diff options
| -rw-r--r-- | fs/reiserfs/bitmap.c | 2 | ||||
| -rw-r--r-- | fs/reiserfs/dir.c | 2 | ||||
| -rw-r--r-- | fs/reiserfs/do_balan.c | 2 | ||||
| -rw-r--r-- | fs/reiserfs/file.c | 2 | ||||
| -rw-r--r-- | fs/reiserfs/fix_node.c | 2 | ||||
| -rw-r--r-- | fs/reiserfs/hashes.c | 2 | ||||
| -rw-r--r-- | fs/reiserfs/ibalance.c | 2 | ||||
| -rw-r--r-- | fs/reiserfs/inode.c | 2 | ||||
| -rw-r--r-- | fs/reiserfs/ioctl.c | 2 | ||||
| -rw-r--r-- | fs/reiserfs/item_ops.c | 2 | ||||
| -rw-r--r-- | fs/reiserfs/journal.c | 2 | ||||
| -rw-r--r-- | fs/reiserfs/lbalance.c | 2 | ||||
| -rw-r--r-- | fs/reiserfs/lock.c | 2 | ||||
| -rw-r--r-- | fs/reiserfs/namei.c | 2 | ||||
| -rw-r--r-- | fs/reiserfs/objectid.c | 2 | ||||
| -rw-r--r-- | fs/reiserfs/prints.c | 4 | ||||
| -rw-r--r-- | fs/reiserfs/procfs.c | 2 | ||||
| -rw-r--r-- | fs/reiserfs/reiserfs.h | 2327 | ||||
| -rw-r--r-- | fs/reiserfs/resize.c | 2 | ||||
| -rw-r--r-- | fs/reiserfs/stree.c | 2 | ||||
| -rw-r--r-- | fs/reiserfs/super.c | 2 | ||||
| -rw-r--r-- | fs/reiserfs/tail_conversion.c | 2 | ||||
| -rw-r--r-- | fs/reiserfs/xattr.c | 2 | ||||
| -rw-r--r-- | fs/reiserfs/xattr.h | 1 | ||||
| -rw-r--r-- | fs/reiserfs/xattr_acl.c | 2 | ||||
| -rw-r--r-- | fs/reiserfs/xattr_security.c | 2 | ||||
| -rw-r--r-- | fs/reiserfs/xattr_trusted.c | 2 | ||||
| -rw-r--r-- | fs/reiserfs/xattr_user.c | 2 | ||||
| -rw-r--r-- | include/linux/reiserfs_fs.h | 2334 |
29 files changed, 2354 insertions, 2362 deletions
diff --git a/fs/reiserfs/bitmap.c b/fs/reiserfs/bitmap.c index 3c463616262..4c0c7d163d1 100644 --- a/fs/reiserfs/bitmap.c +++ b/fs/reiserfs/bitmap.c @@ -4,7 +4,7 @@ /* Reiserfs block (de)allocator, bitmap-based. */ #include <linux/time.h> -#include <linux/reiserfs_fs.h> +#include "reiserfs.h" #include <linux/errno.h> #include <linux/buffer_head.h> #include <linux/kernel.h> diff --git a/fs/reiserfs/dir.c b/fs/reiserfs/dir.c index 133e9355dc6..66c53b642a8 100644 --- a/fs/reiserfs/dir.c +++ b/fs/reiserfs/dir.c @@ -5,7 +5,7 @@ #include <linux/string.h> #include <linux/errno.h> #include <linux/fs.h> -#include <linux/reiserfs_fs.h> +#include "reiserfs.h" #include <linux/stat.h> #include <linux/buffer_head.h> #include <linux/slab.h> diff --git a/fs/reiserfs/do_balan.c b/fs/reiserfs/do_balan.c index 60c08044066..2b7882b508d 100644 --- a/fs/reiserfs/do_balan.c +++ b/fs/reiserfs/do_balan.c @@ -17,7 +17,7 @@ #include <asm/uaccess.h> #include <linux/time.h> -#include <linux/reiserfs_fs.h> +#include "reiserfs.h" #include <linux/buffer_head.h> #include <linux/kernel.h> diff --git a/fs/reiserfs/file.c b/fs/reiserfs/file.c index 3fa5915dea6..8375c922c0d 100644 --- a/fs/reiserfs/file.c +++ b/fs/reiserfs/file.c @@ -3,7 +3,7 @@ */ #include <linux/time.h> -#include <linux/reiserfs_fs.h> +#include "reiserfs.h" #include "acl.h" #include "xattr.h" #include <asm/uaccess.h> diff --git a/fs/reiserfs/fix_node.c b/fs/reiserfs/fix_node.c index 1e4250bc3a6..430e0658704 100644 --- a/fs/reiserfs/fix_node.c +++ b/fs/reiserfs/fix_node.c @@ -37,7 +37,7 @@ #include <linux/time.h> #include <linux/slab.h> #include <linux/string.h> -#include <linux/reiserfs_fs.h> +#include "reiserfs.h" #include <linux/buffer_head.h> /* To make any changes in the tree we find a node, that contains item diff --git a/fs/reiserfs/hashes.c b/fs/reiserfs/hashes.c index 6471c670743..91b0cc1242a 100644 --- a/fs/reiserfs/hashes.c +++ b/fs/reiserfs/hashes.c @@ -19,7 +19,7 @@ // #include <linux/kernel.h> -#include <linux/reiserfs_fs.h> +#include "reiserfs.h" #include <asm/types.h> #define DELTA 0x9E3779B9 diff --git a/fs/reiserfs/ibalance.c b/fs/reiserfs/ibalance.c index 2074fd95046..e1978fd895f 100644 --- a/fs/reiserfs/ibalance.c +++ b/fs/reiserfs/ibalance.c @@ -5,7 +5,7 @@ #include <asm/uaccess.h> #include <linux/string.h> #include <linux/time.h> -#include <linux/reiserfs_fs.h> +#include "reiserfs.h" #include <linux/buffer_head.h> /* this is one and only function that is used outside (do_balance.c) */ diff --git a/fs/reiserfs/inode.c b/fs/reiserfs/inode.c index b696493d6b6..494c315c741 100644 --- a/fs/reiserfs/inode.c +++ b/fs/reiserfs/inode.c @@ -4,7 +4,7 @@ #include <linux/time.h> #include <linux/fs.h> -#include <linux/reiserfs_fs.h> +#include "reiserfs.h" #include "acl.h" #include "xattr.h" #include <linux/exportfs.h> diff --git a/fs/reiserfs/ioctl.c b/fs/reiserfs/ioctl.c index 950e3d1b5c9..0c2185042d5 100644 --- a/fs/reiserfs/ioctl.c +++ b/fs/reiserfs/ioctl.c @@ -5,7 +5,7 @@ #include <linux/capability.h> #include <linux/fs.h> #include <linux/mount.h> -#include <linux/reiserfs_fs.h> +#include "reiserfs.h" #include <linux/time.h> #include <asm/uaccess.h> #include <linux/pagemap.h> diff --git a/fs/reiserfs/item_ops.c b/fs/reiserfs/item_ops.c index 72cb1cc51b8..ee382ef3d30 100644 --- a/fs/reiserfs/item_ops.c +++ b/fs/reiserfs/item_ops.c @@ -3,7 +3,7 @@ */ #include <linux/time.h> -#include <linux/reiserfs_fs.h> +#include "reiserfs.h" // this contains item handlers for old item types: sd, direct, // indirect, directory diff --git a/fs/reiserfs/journal.c b/fs/reiserfs/journal.c index c3cf54fd4de..cf9f4de00a9 100644 --- a/fs/reiserfs/journal.c +++ b/fs/reiserfs/journal.c @@ -37,7 +37,7 @@ #include <linux/time.h> #include <linux/semaphore.h> #include <linux/vmalloc.h> -#include <linux/reiserfs_fs.h> +#include "reiserfs.h" #include <linux/kernel.h> #include <linux/errno.h> #include <linux/fcntl.h> diff --git a/fs/reiserfs/lbalance.c b/fs/reiserfs/lbalance.c index 03d85cbf90b..c4b73f9ccf8 100644 --- a/fs/reiserfs/lbalance.c +++ b/fs/reiserfs/lbalance.c @@ -5,7 +5,7 @@ #include <asm/uaccess.h> #include <linux/string.h> #include <linux/time.h> -#include <linux/reiserfs_fs.h> +#include "reiserfs.h" #include <linux/buffer_head.h> /* these are used in do_balance.c */ diff --git a/fs/reiserfs/lock.c b/fs/reiserfs/lock.c index 7df1ce48203..d735bc8470e 100644 --- a/fs/reiserfs/lock.c +++ b/fs/reiserfs/lock.c @@ -1,4 +1,4 @@ -#include <linux/reiserfs_fs.h> +#include "reiserfs.h" #include <linux/mutex.h> /* diff --git a/fs/reiserfs/namei.c b/fs/reiserfs/namei.c index 34bdab29883..84e8a69cee9 100644 --- a/fs/reiserfs/namei.c +++ b/fs/reiserfs/namei.c @@ -14,7 +14,7 @@ #include <linux/time.h> #include <linux/bitops.h> #include <linux/slab.h> -#include <linux/reiserfs_fs.h> +#include "reiserfs.h" #include "acl.h" #include "xattr.h" #include <linux/quotaops.h> diff --git a/fs/reiserfs/objectid.c b/fs/reiserfs/objectid.c index efc929e6a32..f732d6a5251 100644 --- a/fs/reiserfs/objectid.c +++ b/fs/reiserfs/objectid.c @@ -5,7 +5,7 @@ #include <linux/string.h> #include <linux/random.h> #include <linux/time.h> -#include <linux/reiserfs_fs.h> +#include "reiserfs.h" // find where objectid map starts #define objectid_map(s,rs) (old_format_only (s) ? \ diff --git a/fs/reiserfs/prints.c b/fs/reiserfs/prints.c index 45de98b5946..c0b1112ab7e 100644 --- a/fs/reiserfs/prints.c +++ b/fs/reiserfs/prints.c @@ -4,7 +4,7 @@ #include <linux/time.h> #include <linux/fs.h> -#include <linux/reiserfs_fs.h> +#include "reiserfs.h" #include <linux/string.h> #include <linux/buffer_head.h> @@ -329,7 +329,7 @@ void reiserfs_debug(struct super_block *s, int level, const char *fmt, ...) Numbering scheme for panic used by Vladimir and Anatoly( Hans completely ignores this scheme, and considers it pointless complexity): - panics in reiserfs_fs.h have numbers from 1000 to 1999 + panics in reiserfs.h have numbers from 1000 to 1999 super.c 2000 to 2999 preserve.c (unused) 3000 to 3999 bitmap.c 4000 to 4999 diff --git a/fs/reiserfs/procfs.c b/fs/reiserfs/procfs.c index f931a089bbe..2c1ade692cc 100644 --- a/fs/reiserfs/procfs.c +++ b/fs/reiserfs/procfs.c @@ -12,7 +12,7 @@ #include <linux/time.h> #include <linux/seq_file.h> #include <asm/uaccess.h> -#include <linux/reiserfs_fs.h> +#include "reiserfs.h" #include <linux/init.h> #include <linux/proc_fs.h> diff --git a/fs/reiserfs/reiserfs.h b/fs/reiserfs/reiserfs.h new file mode 100644 index 00000000000..b3865c84f54 --- /dev/null +++ b/fs/reiserfs/reiserfs.h @@ -0,0 +1,2327 @@ +/* + * Copyright 1996, 1997, 1998 Hans Reiser, see reiserfs/README for licensing and copyright details + */ + +#include <linux/reiserfs_fs.h> + +#include <linux/slab.h> +#include <linux/interrupt.h> +#include <linux/sched.h> +#include <linux/workqueue.h> +#include <asm/unaligned.h> +#include <linux/bitops.h> +#include <linux/proc_fs.h> +#include <linux/buffer_head.h> +#include <linux/reiserfs_fs_i.h> +#include <linux/reiserfs_fs_sb.h> + +/* the 32 bit compat definitions with int argument */ +#define REISERFS_IOC32_UNPACK _IOW(0xCD, 1, int) +#define REISERFS_IOC32_GETFLAGS FS_IOC32_GETFLAGS +#define REISERFS_IOC32_SETFLAGS FS_IOC32_SETFLAGS +#define REISERFS_IOC32_GETVERSION FS_IOC32_GETVERSION +#define REISERFS_IOC32_SETVERSION FS_IOC32_SETVERSION + +/* + * Locking primitives. The write lock is a per superblock + * special mutex that has properties close to the Big Kernel Lock + * which was used in the previous locking scheme. + */ +void reiserfs_write_lock(struct super_block *s); +void reiserfs_write_unlock(struct super_block *s); +int reiserfs_write_lock_once(struct super_block *s); +void reiserfs_write_unlock_once(struct super_block *s, int lock_depth); + +#ifdef CONFIG_REISERFS_CHECK +void reiserfs_lock_check_recursive(struct super_block *s); +#else +static inline void reiserfs_lock_check_recursive(struct super_block *s) { } +#endif + +/* + * Several mutexes depend on the write lock. + * However sometimes we want to relax the write lock while we hold + * these mutexes, according to the release/reacquire on schedule() + * properties of the Bkl that were used. + * Reiserfs performances and locking were based on this scheme. + * Now that the write lock is a mutex and not the bkl anymore, doing so + * may result in a deadlock: + * + * A acquire write_lock + * A acquire j_commit_mutex + * A release write_lock and wait for something + * B acquire write_lock + * B can't acquire j_commit_mutex and sleep + * A can't acquire write lock anymore + * deadlock + * + * What we do here is avoiding such deadlock by playing the same game + * than the Bkl: if we can't acquire a mutex that depends on the write lock, + * we release the write lock, wait a bit and then retry. + * + * The mutexes concerned by this hack are: + * - The commit mutex of a journal list + * - The flush mutex + * - The journal lock + * - The inode mutex + */ +static inline void reiserfs_mutex_lock_safe(struct mutex *m, + struct super_block *s) +{ + reiserfs_lock_check_recursive(s); + reiserfs_write_unlock(s); + mutex_lock(m); + reiserfs_write_lock(s); +} + +static inline void +reiserfs_mutex_lock_nested_safe(struct mutex *m, unsigned int subclass, + struct super_block *s) +{ + reiserfs_lock_check_recursive(s); + reiserfs_write_unlock(s); + mutex_lock_nested(m, subclass); + reiserfs_write_lock(s); +} + +static inline void +reiserfs_down_read_safe(struct rw_semaphore *sem, struct super_block *s) +{ + reiserfs_lock_check_recursive(s); + reiserfs_write_unlock(s); + down_read(sem); + reiserfs_write_lock(s); +} + +/* + * When we schedule, we usually want to also release the write lock, + * according to the previous bkl based locking scheme of reiserfs. + */ +static inline void reiserfs_cond_resched(struct super_block *s) +{ + if (need_resched()) { + reiserfs_write_unlock(s); + schedule(); + reiserfs_write_lock(s); + } +} + +struct fid; + +/* in reading the #defines, it may help to understand that they employ + the following abbreviations: + + B = Buffer + I = Item header + H = Height within the tree (should be changed to LEV) + N = Number of the item in the node + STAT = stat data + DEH = Directory Entry Header + EC = Entry Count + E = Entry number + UL = Unsigned Long + BLKH = BLocK Header + UNFM = UNForMatted node + DC = Disk Child + P = Path + + These #defines are named by concatenating these abbreviations, + where first comes the arguments, and last comes the return value, + of the macro. + +*/ + +#define USE_INODE_GENERATION_COUNTER + +#define REISERFS_PREALLOCATE +#define DISPLACE_NEW_PACKING_LOCALITIES +#define PREALLOCATION_SIZE 9 + +/* n must be power of 2 */ +#define _ROUND_UP(x,n) (((x)+(n)-1u) & ~((n)-1u)) + +// to be ok for alpha and others we have to align structures to 8 byte +// boundary. +// FIXME: do not change 4 by anything else: there is code which relies on that +#define ROUND_UP(x) _ROUND_UP(x,8LL) + +/* debug levels. Right now, CONFIG_REISERFS_CHECK means print all debug +** messages. +*/ +#define REISERFS_DEBUG_CODE 5 /* extra messages to help find/debug errors */ + +void __reiserfs_warning(struct super_block *s, const char *id, + const char *func, const char *fmt, ...); +#define reiserfs_warning(s, id, fmt, args...) \ + __reiserfs_warning(s, id, __func__, fmt, ##args) +/* assertions handling */ + +/** always check a condition and panic if it's false. */ +#define __RASSERT(cond, scond, format, args...) \ +do { \ + if (!(cond)) \ + reiserfs_panic(NULL, "assertion failure", "(" #cond ") at " \ + __FILE__ ":%i:%s: " format "\n", \ + in_interrupt() ? -1 : task_pid_nr(current), \ + __LINE__, __func__ , ##args); \ +} while (0) + +#define RASSERT(cond, format, args...) __RASSERT(cond, #cond, format, ##args) + +#if defined( CONFIG_REISERFS_CHECK ) +#define RFALSE(cond, format, args...) __RASSERT(!(cond), "!(" #cond ")", format, ##args) +#else +#define RFALSE( cond, format, args... ) do {;} while( 0 ) +#endif + +#define CONSTF __attribute_const__ +/* + * Disk Data Structures + */ + +/***************************************************************************/ +/* SUPER BLOCK */ +/***************************************************************************/ + +/* + * Structure of super block on disk, a version of which in RAM is often accessed as REISERFS_SB(s)->s_rs + * the version in RAM is part of a larger structure containing fields never written to disk. + */ +#define UNSET_HASH 0 // read_super will guess about, what hash names + // in directories were sorted with +#define TEA_HASH 1 +#define YURA_HASH 2 +#define R5_HASH 3 +#define DEFAULT_HASH R5_HASH + +struct journal_params { + __le32 jp_journal_1st_block; /* where does journal start from on its + * device */ + __le32 jp_journal_dev; /* journal device st_rdev */ + __le32 jp_journal_size; /* size of the journal */ + __le32 jp_journal_trans_max; /* max number of blocks in a transaction. */ + __le32 jp_journal_magic; /* random value made on fs creation (this + * was sb_journal_block_count) */ + __le32 jp_journal_max_batch; /* max number of blocks to batch into a + * trans */ + __le32 jp_journal_max_commit_age; /* in seconds, how old can an async + * commit be */ + __le32 jp_journal_max_trans_age; /* in seconds, how old can a transaction + * be */ +}; + +/* this is the super from 3.5.X, where X >= 10 */ +struct reiserfs_super_block_v1 { + __le32 s_block_count; /* blocks count */ + __le32 s_free_blocks; /* free blocks count */ + __le32 s_root_block; /* root block number */ + struct journal_params s_journal; + __le16 s_blocksize; /* block size */ + __le16 s_oid_maxsize; /* max size of object id array, see + * get_objectid() commentary */ + __le16 s_oid_cursize; /* current size of object id array */ + __le16 s_umount_state; /* this is set to 1 when filesystem was + * umounted, to 2 - when not */ + char s_magic[10]; /* reiserfs magic string indicates that + * file system is reiserfs: + * "ReIsErFs" or "ReIsEr2Fs" or "ReIsEr3Fs" */ + __le16 s_fs_state; /* it is set to used by fsck to mark which + * phase of rebuilding is done */ + __le32 s_hash_function_code; /* indicate, what hash function is being use + * to sort names in a directory*/ + __le16 s_tree_height; /* height of disk tree */ + __le16 s_bmap_nr; /* amount of bitmap blocks needed to address + * each block of file system */ + __le16 s_version; /* this field is only reliable on filesystem + * with non-standard journal */ + __le16 s_reserved_for_journal; /* size in blocks of journal area on main + * device, we need to keep after + * making fs with non-standard journal */ +} __attribute__ ((__packed__)); + +#define SB_SIZE_V1 (sizeof(struct reiserfs_super_block_v1)) + +/* this is the on disk super block */ +struct reiserfs_super_block { + struct reiserfs_super_block_v1 s_v1; + __le32 s_inode_generation; + __le32 s_flags; /* Right now used only by inode-attributes, if enabled */ + unsigned char s_uuid[16]; /* filesystem unique identifier */ + unsigned char s_label[16]; /* filesystem volume label */ + __le16 s_mnt_count; /* Count of mounts since last fsck */ + __le16 s_max_mnt_count; /* Maximum mounts before check */ + __le32 s_lastcheck; /* Timestamp of last fsck */ + __le32 s_check_interval; /* Interval between checks */ + char s_unused[76]; /* zero filled by mkreiserfs and + * reiserfs_convert_objectid_map_v1() + * so any additions must be updated + * there as well. */ +} __attribute__ ((__packed__)); + +#define SB_SIZE (sizeof(struct reiserfs_super_block)) + +#define REISERFS_VERSION_1 0 +#define REISERFS_VERSION_2 2 + +// on-disk super block fields converted to cpu form +#define SB_DISK_SUPER_BLOCK(s) (REISERFS_SB(s)->s_rs) +#define SB_V1_DISK_SUPER_BLOCK(s) (&(SB_DISK_SUPER_BLOCK(s)->s_v1)) +#define SB_BLOCKSIZE(s) \ + le32_to_cpu ((SB_V1_DISK_SUPER_BLOCK(s)->s_blocksize)) +#define SB_BLOCK_COUNT(s) \ + le32_to_cpu ((SB_V1_DISK_SUPER_BLOCK(s)->s_block_count)) +#define SB_FREE_BLOCKS(s) \ + le32_to_cpu ((SB_V1_DISK_SUPER_BLOCK(s)->s_free_blocks)) +#define SB_REISERFS_MAGIC(s) \ + (SB_V1_DISK_SUPER_BLOCK(s)->s_magic) +#define SB_ROOT_BLOCK(s) \ + le32_to_cpu ((SB_V1_DISK_SUPER_BLOCK(s)->s_root_block)) +#define SB_TREE_HEIGHT(s) \ + le16_to_cpu ((SB_V1_DISK_SUPER_BLOCK(s)->s_tree_height)) +#define SB_REISERFS_STATE(s) \ + le16_to_cpu ((SB_V1_DISK_SUPER_BLOCK(s)->s_umount_state)) +#define SB_VERSION(s) le16_to_cpu ((SB_V1_DISK_SUPER_BLOCK(s)->s_version)) +#define SB_BMAP_NR(s) le16_to_cpu ((SB_V1_DISK_SUPER_BLOCK(s)->s_bmap_nr)) + +#define PUT_SB_BLOCK_COUNT(s, val) \ + do { SB_V1_DISK_SUPER_BLOCK(s)->s_block_count = cpu_to_le32(val); } while (0) +#define PUT_SB_FREE_BLOCKS(s, val) \ + do { SB_V1_DISK_SUPER_BLOCK(s)->s_free_blocks = cpu_to_le32(val); } while (0) +#define PUT_SB_ROOT_BLOCK(s, val) \ + do { SB_V1_DISK_SUPER_BLOCK(s)->s_root_block = cpu_to_le32(val); } while (0) +#define PUT_SB_TREE_HEIGHT(s, val) \ + do { SB_V1_DISK_SUPER_BLOCK(s)->s_tree_height = cpu_to_le16(val); } while (0) +#define PUT_SB_REISERFS_STATE(s, val) \ + do { SB_V1_DISK_SUPER_BLOCK(s)->s_umount_state = cpu_to_le16(val); } while (0) +#define PUT_SB_VERSION(s, val) \ + do { SB_V1_DISK_SUPER_BLOCK(s)->s_version = cpu_to_le16(val); } while (0) +#define PUT_SB_BMAP_NR(s, val) \ + do { SB_V1_DISK_SUPER_BLOCK(s)->s_bmap_nr = cpu_to_le16 (val); } while (0) + +#define SB_ONDISK_JP(s) (&SB_V1_DISK_SUPER_BLOCK(s)->s_journal) +#define SB_ONDISK_JOURNAL_SIZE(s) \ + le32_to_cpu ((SB_ONDISK_JP(s)->jp_journal_size)) +#define SB_ONDISK_JOURNAL_1st_BLOCK(s) \ + le32_to_cpu ((SB_ONDISK_JP(s)->jp_journal_1st_block)) +#define SB_ONDISK_JOURNAL_DEVICE(s) \ + le32_to_cpu ((SB_ONDISK_JP(s)->jp_journal_dev)) +#define SB_ONDISK_RESERVED_FOR_JOURNAL(s) \ + le16_to_cpu ((SB_V1_DISK_SUPER_BLOCK(s)->s_reserved_for_journal)) + +#define is_block_in_log_or_reserved_area(s, block) \ + block >= SB_JOURNAL_1st_RESERVED_BLOCK(s) \ + && block < SB_JOURNAL_1st_RESERVED_BLOCK(s) + \ + ((!is_reiserfs_jr(SB_DISK_SUPER_BLOCK(s)) ? \ + SB_ONDISK_JOURNAL_SIZE(s) + 1 : SB_ONDISK_RESERVED_FOR_JOURNAL(s))) + +int is_reiserfs_3_5(struct reiserfs_super_block *rs); +int is_reiserfs_3_6(struct reiserfs_super_block *rs); +int is_reiserfs_jr(struct reiserfs_super_block *rs); + +/* ReiserFS leaves the first 64k unused, so that partition labels have + enough space. If someone wants to write a fancy bootloader that + needs more than 64k, let us know, and this will be increased in size. + This number must be larger than than the largest block size on any + platform, or code will break. -Hans */ +#define REISERFS_DISK_OFFSET_IN_BYTES (64 * 1024) +#define REISERFS_FIRST_BLOCK unused_define +#define REISERFS_JOURNAL_OFFSET_IN_BYTES REISERFS_DISK_OFFSET_IN_BYTES + +/* the spot for the super in versions 3.5 - 3.5.10 (inclusive) */ +#define REISERFS_OLD_DISK_OFFSET_IN_BYTES (8 * 1024) + +/* reiserfs internal error code (used by search_by_key and fix_nodes)) */ +#define CARRY_ON 0 +#define REPEAT_SEARCH -1 +#define IO_ERROR -2 +#define NO_DISK_SPACE -3 +#define NO_BALANCING_NEEDED (-4) +#define NO_MORE_UNUSED_CONTIGUOUS_BLOCKS (-5) +#define QUOTA_EXCEEDED -6 + +typedef __u32 b_blocknr_t; +typedef __le32 unp_t; + +struct unfm_nodeinfo { + unp_t unfm_nodenum; + unsigned short unfm_freespace; +}; + +/* there are two formats of keys: 3.5 and 3.6 + */ +#define KEY_FORMAT_3_5 0 +#define KEY_FORMAT_3_6 1 + +/* there are two stat datas */ +#define STAT_DATA_V1 0 +#define STAT_DATA_V2 1 + +static inline struct reiserfs_inode_info *REISERFS_I(const struct inode *inode) +{ + return container_of(inode, struct reiserfs_inode_info, vfs_inode); +} + +static inline struct reiserfs_sb_info *REISERFS_SB(const struct super_block *sb) +{ + return sb->s_fs_info; +} + +/* Don't trust REISERFS_SB(sb)->s_bmap_nr, it's a u16 + * which overflows on large file systems. */ +static inline __u32 reiserfs_bmap_count(struct super_block *sb) +{ + return (SB_BLOCK_COUNT(sb) - 1) / (sb->s_blocksize * 8) + 1; +} + +static inline int bmap_would_wrap(unsigned bmap_nr) +{ + return bmap_nr > ((1LL << 16) - 1); +} + +/** this says about version of key of all items (but stat data) the + object consists of */ +#define get_inode_item_key_version( inode ) \ + ((REISERFS_I(inode)->i_flags & i_item_key_version_mask) ? KEY_FORMAT_3_6 : KEY_FORMAT_3_5) + +#define set_inode_item_key_version( inode, version ) \ + ({ if((version)==KEY_FORMAT_3_6) \ + REISERFS_I(inode)->i_flags |= i_item_key_version_mask; \ + else \ + REISERFS_I(inode)->i_flags &= ~i_item_key_version_mask; }) + +#define get_inode_sd_version(inode) \ + ((REISERFS_I(inode)->i_flags & i_stat_data_version_mask) ? STAT_DATA_V2 : STAT_DATA_V1) + +#define set_inode_sd_version(inode, version) \ + ({ if((version)==STAT_DATA_V2) \ + REISERFS_I(inode)->i_flags |= i_stat_data_version_mask; \ + else \ + REISERFS_I(inode)->i_flags &= ~i_stat_data_version_mask; }) + +/* This is an aggressive tail suppression policy, I am hoping it + improves our benchmarks. The principle behind it is that percentage + space saving is what matters, not absolute space saving. This is + non-intuitive, but it helps to understand it if you consider that the + cost to access 4 blocks is not much more than the cost to access 1 + block, if you have to do a seek and rotate. A tail risks a + non-linear disk access that is significant as a percentage of total + time cost for a 4 block file and saves an amount of space that is + less significant as a percentage of space, or so goes the hypothesis. + -Hans */ +#define STORE_TAIL_IN_UNFM_S1(n_file_size,n_tail_size,n_block_size) \ +(\ + (!(n_tail_size)) || \ + (((n_tail_size) > MAX_DIRECT_ITEM_LEN(n_block_size)) || \ + ( (n_file_size) >= (n_block_size) * 4 ) || \ + ( ( (n_file_size) >= (n_block_size) * 3 ) && \ + ( (n_tail_size) >= (MAX_DIRECT_ITEM_LEN(n_block_size))/4) ) || \ + ( ( (n_file_size) >= (n_block_size) * 2 ) && \ + ( (n_tail_size) >= (MAX_DIRECT_ITEM_LEN(n_block_size))/2) ) || \ + ( ( (n_file_size) >= (n_block_size) ) && \ + ( (n_tail_size) >= (MAX_DIRECT_ITEM_LEN(n_block_size) * 3)/4) ) ) \ +) + +/* Another strategy for tails, this one means only create a tail if all the + file would fit into one DIRECT item. + Primary intention for this one is to increase performance by decreasing + seeking. +*/ +#define STORE_TAIL_IN_UNFM_S2(n_file_size,n_tail_size,n_block_size) \ +(\ + (!(n_tail_size)) || \ + (((n_file_size) > MAX_DIRECT_ITEM_LEN(n_block_size)) ) \ +) + +/* + * values for s_umount_state field + */ +#define REISERFS_VALID_FS 1 +#define REISERFS_ERROR_FS 2 + +// +// there are 5 item types currently +// +#define TYPE_STAT_DATA 0 +#define TYPE_INDIRECT 1 +#define TYPE_DIRECT 2 +#define TYPE_DIRENTRY 3 +#define TYPE_MAXTYPE 3 +#define TYPE_ANY 15 // FIXME: comment is required + +/***************************************************************************/ +/* KEY & ITEM HEAD */ +/***************************************************************************/ + +// +// directories use this key as well as old files +// +struct offset_v1 { + __le32 k_offset; + __le32 k_uniqueness; +} __attribute__ ((__packed__)); + +struct offset_v2 { + __le64 v; +} __attribute__ ((__packed__)); + +static inline __u16 offset_v2_k_type(const struct offset_v2 *v2) +{ + __u8 type = le64_to_cpu(v2->v) >> 60; + return (type <= TYPE_MAXTYPE) ? type : TYPE_ANY; +} + +static inline void set_offset_v2_k_type(struct offset_v2 *v2, int type) +{ + v2->v = + (v2->v & cpu_to_le64(~0ULL >> 4)) | cpu_to_le64((__u64) type << 60); +} + +static inline loff_t offset_v2_k_offset(const struct offset_v2 *v2) +{ + return le64_to_cpu(v2->v) & (~0ULL >> 4); +} + +static inline void set_offset_v2_k_offset(struct offset_v2 *v2, loff_t offset) +{ + offset &= (~0ULL >> 4); + v2->v = (v2->v & cpu_to_le64(15ULL << 60)) | cpu_to_le64(offset); +} + +/* Key of an item determines its location in the S+tree, and + is composed of 4 components */ +struct reiserfs_key { + __le32 k_dir_id; /* packing locality: by default parent + directory object id */ + __le32 k_objectid; /* object identifier */ + union { + struct offset_v1 k_offset_v1; + struct offset_v2 k_offset_v2; + } __attribute__ ((__packed__)) u; +} __attribute__ ((__packed__)); + +struct in_core_key { + __u32 k_dir_id; /* packing locality: by default parent + directory object id */ + __u32 k_objectid; /* object identifier */ + __u64 k_offset; + __u8 k_type; +}; + +struct cpu_key { + struct in_core_key on_disk_key; + int version; + int key_length; /* 3 in all cases but direct2indirect and + indirect2direct conversion */ +}; + +/* Our function for comparing keys can compare keys of different + lengths. It takes as a parameter the length of the keys it is to + compare. These defines are used in determining what is to be passed + to it as that parameter. */ +#define REISERFS_FULL_KEY_LEN 4 +#define REISERFS_SHORT_KEY_LEN 2 + +/* The result of the key compare */ +#define FIRST_GREATER 1 +#define SECOND_GREATER -1 +#define KEYS_IDENTICAL 0 +#define KEY_FOUND 1 +#define KEY_NOT_FOUND 0 + +#define KEY_SIZE (sizeof(struct reiserfs_key)) +#define SHORT_KEY_SIZE (sizeof (__u32) + sizeof (__u32)) + +/* return values for search_by_key and clones */ +#define ITEM_FOUND 1 +#define ITEM_NOT_FOUND 0 +#define ENTRY_FOUND 1 +#define ENTRY_NOT_FOUND 0 +#define DIRECTORY_NOT_FOUND -1 +#define REGULAR_FILE_FOUND -2 +#define DIRECTORY_FOUND -3 +#define BYTE_FOUND 1 +#define BYTE_NOT_FOUND 0 +#define FILE_NOT_FOUND -1 + +#define POSITION_FOUND 1 +#define POSITION_NOT_FOUND 0 + +// return values for reiserfs_find_entry and search_by_entry_key +#define NAME_FOUND 1 +#define NAME_NOT_FOUND 0 +#define GOTO_PREVIOUS_ITEM 2 +#define NAME_FOUND_INVISIBLE 3 + +/* Everything in the filesystem is stored as a set of items. The + item head contains the key of the item, its free space (for + indirect items) and specifies the location of the item itself + within the block. */ + +struct item_head { + /* Everything in the tree is found by searching for it based on + * its key.*/ + struct reiserfs_key ih_key; + union { + /* The free space in the last unformatted node of an + indirect item if this is an indirect item. This + equals 0xFFFF iff this is a direct item or stat data + item. Note that the key, not this field, is used to + determine the item type, and thus which field this + union contains. */ + __le16 ih_free_space_reserved; + /* Iff this is a directory item, this field equals the + number of directory entries in the directory item. */ + __le16 ih_entry_count; + } __attribute__ ((__packed__)) u; + __le16 ih_item_len; /* total size of the item body */ + __le16 ih_item_location; /* an offset to the item body + * within the block */ + __le16 ih_version; /* 0 for all old items, 2 for new + ones. Highest bit is set by fsck + temporary, cleaned after all + done */ +} __attribute__ ((__packed__)); +/* size of item header */ +#define IH_SIZE (sizeof(struct item_head)) + +#define ih_free_space(ih) le16_to_cpu((ih)->u.ih_free_space_reserved) +#define ih_version(ih) le16_to_cpu((ih)->ih_version) +#define ih_entry_count(ih) le16_to_cpu((ih)->u.ih_entry_count) +#define ih_location(ih) le16_to_cpu((ih)->ih_item_location) +#define ih_item_len(ih) le16_to_cpu((ih)->ih_item_len) + +#define put_ih_free_space(ih, val) do { (ih)->u.ih_free_space_reserved = cpu_to_le16(val); } while(0) +#define put_ih_version(ih, val) do { (ih)->ih_version = cpu_to_le16(val); } while (0) +#define put_ih_entry_count(ih, val) do { (ih)->u.ih_entry_count = cpu_to_le16(val); } while (0) +#define put_ih_location(ih, val) do { (ih)->ih_item_location = cpu_to_le16(val); } while (0) +#define put_ih_item_len(ih, val) do { (ih)->ih_item_len = cpu_to_le16(val); } while (0) + +#define unreachable_item(ih) (ih_version(ih) & (1 << 15)) + +#define get_ih_free_space(ih) (ih_version (ih) == KEY_FORMAT_3_6 ? 0 : ih_free_space (ih)) +#define set_ih_free_space(ih,val) put_ih_free_space((ih), ((ih_version(ih) == KEY_FORMAT_3_6) ? 0 : (val))) + +/* these operate on indirect items, where you've got an array of ints +** at a possibly unaligned location. These are a noop on ia32 +** +** p is the array of __u32, i is the index into the array, v is the value +** to store there. +*/ +#define get_block_num(p, i) get_unaligned_le32((p) + (i)) +#define put_block_num(p, i, v) put_unaligned_le32((v), (p) + (i)) + +// +// in old version uniqueness field shows key type +// +#define V1_SD_UNIQUENESS 0 +#define V1_INDIRECT_UNIQUENESS 0xfffffffe +#define V1_DIRECT_UNIQUENESS 0xffffffff +#define V1_DIRENTRY_UNIQUENESS 500 +#define V1_ANY_UNIQUENESS 555 // FIXME: comment is required + +// +// here are conversion routines +// +static inline int uniqueness2type(__u32 uniqueness) CONSTF; +static inline int uniqueness2type(__u32 uniqueness) +{ + switch ((int)uniqueness) { + case V1_SD_UNIQUENESS: + return TYPE_STAT_DATA; + case V1_INDIRECT_UNIQUENESS: + return TYPE_INDIRECT; + case V1_DIRECT_UNIQUENESS: + return TYPE_DIRECT; + case V1_DIRENTRY_UNIQUENESS: + return TYPE_DIRENTRY; + case V1_ANY_UNIQUENESS: + default: + return TYPE_ANY; + } +} + +static inline __u32 type2uniqueness(int type) CONSTF; +static inline __u32 type2uniqueness(int type) +{ + switch (type) { + case TYPE_STAT_DATA: + return V1_SD_UNIQUENESS; + case TYPE_INDIRECT: + return V1_INDIRECT_UNIQUENESS; + case TYPE_DIRECT: + return V1_DIRECT_UNIQUENESS; + case TYPE_DIRENTRY: + return V1_DIRENTRY_UNIQUENESS; + case TYPE_ANY: + default: + return V1_ANY_UNIQUENESS; + } +} + +// +// key is pointer to on disk key which is stored in le, result is cpu, +// there is no way to get version of object from key, so, provide +// version to these defines +// +static inline loff_t le_key_k_offset(int version, + const struct reiserfs_key *key) +{ + return (version == KEY_FORMAT_3_5) ? + le32_to_cpu(key->u.k_offset_v1.k_offset) : + offset_v2_k_offset(&(key->u.k_offset_v2)); +} + +static inline loff_t le_ih_k_offset(const struct item_head *ih) +{ + return le_key_k_offset(ih_version(ih), &(ih->ih_key)); +} + +static inline loff_t le_key_k_type(int version, const struct reiserfs_key *key) +{ + return (version == KEY_FORMAT_3_5) ? + uniqueness2type(le32_to_cpu(key->u.k_offset_v1.k_uniqueness)) : + offset_v2_k_type(&(key->u.k_offset_v2)); +} + +static inline loff_t le_ih_k_type(const struct item_head *ih) +{ + return le_key_k_type(ih_version(ih), &(ih->ih_key)); +} + +static inline void set_le_key_k_offset(int version, struct reiserfs_key *key, + loff_t offset) +{ + (version == KEY_FORMAT_3_5) ? (void)(key->u.k_offset_v1.k_offset = cpu_to_le32(offset)) : /* jdm check */ + (void)(set_offset_v2_k_offset(&(key->u.k_offset_v2), offset)); +} + +static inline void set_le_ih_k_offset(struct item_head *ih, loff_t offset) +{ + set_le_key_k_offset(ih_version(ih), &(ih->ih_key), offset); +} + +static inline void set_le_key_k_type(int version, struct reiserfs_key *key, + int type) +{ + (version == KEY_FORMAT_3_5) ? + (void)(key->u.k_offset_v1.k_uniqueness = + cpu_to_le32(type2uniqueness(type))) + : (void)(set_offset_v2_k_type(&(key->u.k_offset_v2), type)); +} + +static inline void set_le_ih_k_type(struct item_head *ih, int type) +{ + set_le_key_k_type(ih_version(ih), &(ih->ih_key), type); +} + +static inline int is_direntry_le_key(int version, struct reiserfs_key *key) +{ + return le_key_k_type(version, key) == TYPE_DIRENTRY; +} + +static inline int is_direct_le_key(int version, struct reiserfs_key *key) +{ + return le_key_k_type(version, key) == TYPE_DIRECT; +} + +static inline int is_indirect_le_key(int version, struct reiserfs_key *key) +{ + return le_key_k_type(version, key) == TYPE_INDIRECT; +} + +static inline int is_statdata_le_key(int version, struct reiserfs_key *key) +{ + return le_key_k_type(version, key) == TYPE_STAT_DATA; +} + +// +// item header has version. +// +static inline int is_direntry_le_ih(struct item_head *ih) +{ + return is_direntry_le_key(ih_version(ih), &ih->ih_key); +} + +static inline int is_direct_le_ih(struct item_head *ih) +{ + return is_direct_le_key(ih_version(ih), &ih->ih_key); +} + +static inline int is_indirect_le_ih(struct item_head *ih) +{ + return is_indirect_le_key(ih_version(ih), &ih->ih_key); +} + +static inline int is_statdata_le_ih(struct item_head *ih) +{ + return is_statdata_le_key(ih_version(ih), &ih->ih_key); +} + +// +// key is pointer to cpu key, result is cpu +// +static inline loff_t cpu_key_k_offset(const struct cpu_key *key) +{ + return key->on_disk_key.k_offset; +} + +static inline loff_t cpu_key_k_type(const struct cpu_key *key) +{ + return key->on_disk_key.k_type; +} + +static inline void set_cpu_key_k_offset(struct cpu_key *key, loff_t offset) +{ + key->on_disk_key.k_offset = offset; +} + +static inline void set_cpu_key_k_type(struct cpu_key *key, int type) +{ + key->on_disk_key.k_type = type; +} + +static inline void cpu_key_k_offset_dec(struct cpu_key *key) +{ + key->on_disk_key.k_offset--; +} + +#define is_direntry_cpu_key(key) (cpu_key_k_type (key) == TYPE_DIRENTRY) +#define is_direct_cpu_key(key) (cpu_key_k_type (key) == TYPE_DIRECT) +#define is_indirect_cpu_key(key) (cpu_key_k_type (key) == TYPE_INDIRECT) +#define is_statdata_cpu_key(key) (cpu_key_k_type (key) == TYPE_STAT_DATA) + +/* are these used ? */ +#define is_direntry_cpu_ih(ih) (is_direntry_cpu_key (&((ih)->ih_key))) +#define is_direct_cpu_ih(ih) (is_direct_cpu_key (&((ih)->ih_key))) +#define is_indirect_cpu_ih(ih) (is_indirect_cpu_key (&((ih)->ih_key))) +#define is_statdata_cpu_ih(ih) (is_statdata_cpu_key (&((ih)->ih_key))) + +#define I_K_KEY_IN_ITEM(ih, key, n_blocksize) \ + (!COMP_SHORT_KEYS(ih, key) && \ + I_OFF_BYTE_IN_ITEM(ih, k_offset(key), n_blocksize)) + +/* maximal length of item */ +#define MAX_ITEM_LEN(block_size) (block_size - BLKH_SIZE - IH_SIZE) +#define MIN_ITEM_LEN 1 + +/* object identifier for root dir */ +#define REISERFS_ROOT_OBJECTID 2 +#define REISERFS_ROOT_PARENT_OBJECTID 1 + +extern struct reiserfs_key root_key; + +/* + * Picture represents a leaf of the S+tree + * ______________________________________________________ + * | | Array of | | | + * |Block | Object-Item | F r e e | Objects- | + * | head | Headers | S p a c e | Items | + * |______|_______________|___________________|___________| + */ + +/* Header of a disk block. More precisely, header of a formatted leaf + or internal node, and not the header of an unformatted node. */ +struct block_head { + __le16 blk_level; /* Level of a block in the tree. */ + __le16 blk_nr_item; /* Number of keys/items in a block. */ + __le16 blk_free_space; /* Block free space in bytes. */ + __le16 blk_reserved; + /* dump this in v4/planA */ + struct reiserfs_key blk_right_delim_key; /* kept only for compatibility */ +}; + +#define BLKH_SIZE (sizeof(struct block_head)) +#define blkh_level(p_blkh) (le16_to_cpu((p_blkh)->blk_level)) +#define blkh_nr_item(p_blkh) (le16_to_cpu((p_blkh)->blk_nr_item)) +#define blkh_free_space(p_blkh) (le16_to_cpu((p_blkh)->blk_free_space)) +#define blkh_reserved(p_blkh) (le16_to_cpu((p_blkh)->blk_reserved)) +#define set_blkh_level(p_blkh,val) ((p_blkh)->blk_level = cpu_to_le16(val)) +#define set_blkh_nr_item(p_blkh,val) ((p_blkh)->blk_nr_item = cpu_to_le16(val)) +#define set_blkh_free_space(p_blkh,val) ((p_blkh)->blk_free_space = cpu_to_le16(val)) +#define set_blkh_reserved(p_blkh,val) ((p_blkh)->blk_reserved = cpu_to_le16(val)) +#define blkh_right_delim_key(p_blkh) ((p_blkh)->blk_right_delim_key) +#define set_blkh_right_delim_key(p_blkh,val) ((p_blkh)->blk_right_delim_key = val) + +/* + * values for blk_level field of the struct block_head + */ + +#define FREE_LEVEL 0 /* when node gets removed from the tree its + blk_level is set to FREE_LEVEL. It is then + used to see whether the node is still in the + tree */ + +#define DISK_LEAF_NODE_LEVEL 1 /* Leaf node level. */ + +/* Given the buffer head of a formatted node, resolve to the block head of that node. */ +#define B_BLK_HEAD(bh) ((struct block_head *)((bh)->b_data)) +/* Number of items that are in buffer. */ +#define B_NR_ITEMS(bh) (blkh_nr_item(B_BLK_HEAD(bh))) +#define B_LEVEL(bh) (blkh_level(B_BLK_HEAD(bh))) +#define B_FREE_SPACE(bh) (blkh_free_space(B_BLK_HEAD(bh))) + +#define PUT_B_NR_ITEMS(bh, val) do { set_blkh_nr_item(B_BLK_HEAD(bh), val); } while (0) +#define PUT_B_LEVEL(bh, val) do { set_blkh_level(B_BLK_HEAD(bh), val); } while (0) +#define PUT_B_FREE_SPACE(bh, val) do { set_blkh_free_space(B_BLK_HEAD(bh), val); } while (0) + +/* Get right delimiting key. -- little endian */ +#define B_PRIGHT_DELIM_KEY(bh) (&(blk_right_delim_key(B_BLK_HEAD(bh)))) + +/* Does the buffer contain a disk leaf. */ +#define B_IS_ITEMS_LEVEL(bh) (B_LEVEL(bh) == DISK_LEAF_NODE_LEVEL) + +/* Does the buffer contain a disk internal node */ +#define B_IS_KEYS_LEVEL(bh) (B_LEVEL(bh) > DISK_LEAF_NODE_LEVEL \ + && B_LEVEL(bh) <= MAX_HEIGHT) + +/***************************************************************************/ +/* STAT DATA */ +/***************************************************************************/ + +// +// old stat data is 32 bytes long. We are going to distinguish new one by +// different size +// +struct stat_data_v1 { + __le16 sd_mode; /* file type, permissions */ + __le16 sd_nlink; /* number of hard links */ + __le16 sd_uid; /* owner */ + __le16 sd_gid; /* group */ + __le32 sd_size; /* file size */ + __le32 sd_atime; /* time of last access */ + __le32 sd_mtime; /* time file was last modified */ + __le32 sd_ctime; /* time inode (stat data) was last changed (except changes to sd_atime and sd_mtime) */ + union { + __le32 sd_rdev; + __le32 sd_blocks; /* number of blocks file uses */ + } __attribute__ ((__packed__)) u; + __le32 sd_first_direct_byte; /* first byte of file which is stored + in a direct item: except that if it + equals 1 it is a symlink and if it + equals ~(__u32)0 there is no + direct item. The existence of this + field really grates on me. Let's + replace it with a macro based on + sd_size and our tail suppression + policy. Someday. -Hans */ +} __attribute__ ((__packed__)); + +#define SD_V1_SIZE (sizeof(struct stat_data_v1)) +#define stat_data_v1(ih) (ih_version (ih) == KEY_FORMAT_3_5) +#define sd_v1_mode(sdp) (le16_to_cpu((sdp)->sd_mode)) +#define set_sd_v1_mode(sdp,v) ((sdp)->sd_mode = cpu_to_le16(v)) +#define sd_v1_nlink(sdp) (le16_to_cpu((sdp)->sd_nlink)) +#define set_sd_v1_nlink(sdp,v) ((sdp)->sd_nlink = cpu_to_le16(v)) +#define sd_v1_uid(sdp) (le16_to_cpu((sdp)->sd_uid)) +#define set_sd_v1_uid(sdp,v) ((sdp)->sd_uid = cpu_to_le16(v)) +#define sd_v1_gid(sdp) (le16_to_cpu((sdp)->sd_gid)) +#define set_sd_v1_gid(sdp,v) ((sdp)->sd_gid = cpu_to_le16(v)) +#define sd_v1_size(sdp) (le32_to_cpu((sdp)->sd_size)) +#define set_sd_v1_size(sdp,v) ((sdp)->sd_size = cpu_to_le32(v)) +#define sd_v1_atime(sdp) (le32_to_cpu((sdp)->sd_atime)) +#define set_sd_v1_atime(sdp,v) ((sdp)->sd_atime = cpu_to_le32(v)) +#define sd_v1_mtime(sdp) (le32_to_cpu((sdp)->sd_mtime)) +#define set_sd_v1_mtime(sdp,v) ((sdp)->sd_mtime = cpu_to_le32(v)) +#define sd_v1_ctime(sdp) (le32_to_cpu((sdp)->sd_ctime)) +#define set_sd_v1_ctime(sdp,v) ((sdp)->sd_ctime = cpu_to_le32(v)) +#define sd_v1_rdev(sdp) (le32_to_cpu((sdp)->u.sd_rdev)) +#define set_sd_v1_rdev(sdp,v) ((sdp)->u.sd_rdev = cpu_to_le32(v)) +#define sd_v1_blocks(sdp) (le32_to_cpu((sdp)->u.sd_blocks)) +#define set_sd_v1_blocks(sdp,v) ((sdp)->u.sd_blocks = cpu_to_le32(v)) +#define sd_v1_first_direct_byte(sdp) \ + (le32_to_cpu((sdp)->sd_first_direct_byte)) +#define set_sd_v1_first_direct_byte(sdp,v) \ + ((sdp)->sd_first_direct_byte = cpu_to_le32(v)) + +/* inode flags stored in sd_attrs (nee sd_reserved) */ + +/* we want common flags to have the same values as in ext2, + so chattr(1) will work without problems */ +#define REISERFS_IMMUTABLE_FL FS_IMMUTABLE_FL +#define REISERFS_APPEND_FL FS_APPEND_FL +#define REISERFS_SYNC_FL FS_SYNC_FL +#define REISERFS_NOATIME_FL FS_NOATIME_FL +#define REISERFS_NODUMP_FL FS_NODUMP_FL +#define REISERFS_SECRM_FL FS_SECRM_FL +#define REISERFS_UNRM_FL FS_UNRM_FL +#define REISERFS_COMPR_FL FS_COMPR_FL +#define REISERFS_NOTAIL_FL FS_NOTAIL_FL + +/* persistent flags that file inherits from the parent directory */ +#define REISERFS_INHERIT_MASK ( REISERFS_IMMUTABLE_FL | \ + REISERFS_SYNC_FL | \ + REISERFS_NOATIME_FL | \ + REISERFS_NODUMP_FL | \ + REISERFS_SECRM_FL | \ + REISERFS_COMPR_FL | \ + REISERFS_NOTAIL_FL ) + +/* Stat Data on disk (reiserfs version of UFS disk inode minus the + address blocks) */ +struct stat_data { + __le16 sd_mode; /* file type, permissions */ + __le16 sd_attrs; /* persistent inode flags */ + __le32 sd_nlink; /* number of hard links */ + __le64 sd_size; /* file size */ + __le32 sd_uid; /* owner */ + __le32 sd_gid; /* group */ + __le32 sd_atime; /* time of last access */ + __le32 sd_mtime; /* time file was last modified */ + __le32 sd_ctime; /* time inode (stat data) was last changed (except changes to sd_atime and sd_mtime) */ + __le32 sd_blocks; + union { + __le32 sd_rdev; + __le32 sd_generation; + //__le32 sd_first_direct_byte; + /* first byte of file which is stored in a + direct item: except that if it equals 1 + it is a symlink and if it equals + ~(__u32)0 there is no direct item. The + existence of this field really grates + on me. Let's replace it with a macro + based on sd_size and our tail + suppression policy? */ + } __attribute__ ((__packed__)) u; +} __attribute__ ((__packed__)); +// +// this is 44 bytes long +// +#define SD_SIZE (sizeof(struct stat_data)) +#define SD_V2_SIZE SD_SIZE +#define stat_data_v2(ih) (ih_version (ih) == KEY_FORMAT_3_6) +#define sd_v2_mode(sdp) (le16_to_cpu((sdp)->sd_mode)) +#define set_sd_v2_mode(sdp,v) ((sdp)->sd_mode = cpu_to_le16(v)) +/* sd_reserved */ +/* set_sd_reserved */ +#define sd_v2_nlink(sdp) (le32_to_cpu((sdp)->sd_nlink)) +#define set_sd_v2_nlink(sdp,v) ((sdp)->sd_nlink = cpu_to_le32(v)) +#define sd_v2_size(sdp) (le64_to_cpu((sdp)->sd_size)) +#define set_sd_v2_size(sdp,v) ((sdp)->sd_size = cpu_to_le64(v)) +#define sd_v2_uid(sdp) (le32_to_cpu((sdp)->sd_uid)) +#define set_sd_v2_uid(sdp,v) ((sdp)->sd_uid = cpu_to_le32(v)) +#define sd_v2_gid(sdp) (le32_to_cpu((sdp)->sd_gid)) +#define set_sd_v2_gid(sdp,v) ((sdp)->sd_gid = cpu_to_le32(v)) +#define sd_v2_atime(sdp) (le32_to_cpu((sdp)->sd_atime)) +#define set_sd_v2_atime(sdp,v) ((sdp)->sd_atime = cpu_to_le32(v)) +#define sd_v2_mtime(sdp) (le32_to_cpu((sdp)->sd_mtime)) +#define set_sd_v2_mtime(sdp,v) ((sdp)->sd_mtime = cpu_to_le32(v)) +#define sd_v2_ctime(sdp) (le32_to_cpu((sdp)->sd_ctime)) +#define set_sd_v2_ctime(sdp,v) ((sdp)->sd_ctime = cpu_to_le32(v)) +#define sd_v2_blocks(sdp) (le32_to_cpu((sdp)->sd_blocks)) +#define set_sd_v2_blocks(sdp,v) ((sdp)->sd_blocks = cpu_to_le32(v)) +#define sd_v2_rdev(sdp) (le32_to_cpu((sdp)->u.sd_rdev)) +#define set_sd_v2_rdev(sdp,v) ((sdp)->u.sd_rdev = cpu_to_le32(v)) +#define sd_v2_generation(sdp) (le32_to_cpu((sdp)->u.sd_generation)) +#define set_sd_v2_generation(sdp,v) ((sdp)->u.sd_generation = cpu_to_le32(v)) +#define sd_v2_attrs(sdp) (le16_to_cpu((sdp)->sd_attrs)) +#define set_sd_v2_attrs(sdp,v) ((sdp)->sd_attrs = cpu_to_le16(v)) + +/***************************************************************************/ +/* DIRECTORY STRUCTURE */ +/***************************************************************************/ +/* + Picture represents the structure of directory items + ________________________________________________ + | Array of | | | | | | + | directory |N-1| N-2 | .... | 1st |0th| + | entry headers | | | | | | + |_______________|___|_____|________|_______|___| + <---- directory entries ------> + + First directory item has k_offset component 1. We store "." and ".." + in one item, always, we never split "." and ".." into differing + items. This makes, among other things, the code for removing + directories simpler. */ +#define SD_OFFSET 0 +#define SD_UNIQUENESS 0 +#define DOT_OFFSET 1 +#define DOT_DOT_OFFSET 2 +#define DIRENTRY_UNIQUENESS 500 + +/* */ +#define FIRST_ITEM_OFFSET 1 + +/* + Q: How to get key of object pointed to by entry from entry? + + A: Each directory entry has its header. This header has deh_dir_id and deh_objectid fields, those are key + of object, entry points to */ + +/* NOT IMPLEMENTED: + Directory will someday contain stat data of object */ + +struct reiserfs_de_head { + __le32 deh_offset; /* third component of the directory entry key */ + __le32 deh_dir_id; /* objectid of the parent directory of the object, that is referenced + by directory entry */ + __le32 deh_objectid; /* objectid of the object, that is referenced by directory entry */ + __le16 deh_location; /* offset of name in the whole item */ + __le16 deh_state; /* whether 1) entry contains stat data (for future), and 2) whether + entry is hidden (unlinked) */ +} __attribute__ ((__packed__)); +#define DEH_SIZE sizeof(struct reiserfs_de_head) +#define deh_offset(p_deh) (le32_to_cpu((p_deh)->deh_offset)) +#define deh_dir_id(p_deh) (le32_to_cpu((p_deh)->deh_dir_id)) +#define deh_objectid(p_deh) (le32_to_cpu((p_deh)->deh_objectid)) +#define deh_location(p_deh) (le16_to_cpu((p_deh)->deh_location)) +#define deh_state(p_deh) (le16_to_cpu((p_deh)->deh_state)) + +#define put_deh_offset(p_deh,v) ((p_deh)->deh_offset = cpu_to_le32((v))) +#define put_deh_dir_id(p_deh,v) ((p_deh)->deh_dir_id = cpu_to_le32((v))) +#define put_deh_objectid(p_deh,v) ((p_deh)->deh_objectid = cpu_to_le32((v))) +#define put_deh_location(p_deh,v) ((p_deh)->deh_location = cpu_to_le16((v))) +#define put_deh_state(p_deh,v) ((p_deh)->deh_state = cpu_to_le16((v))) + +/* empty directory contains two entries "." and ".." and their headers */ +#define EMPTY_DIR_SIZE \ +(DEH_SIZE * 2 + ROUND_UP (strlen (".")) + ROUND_UP (strlen (".."))) + +/* old format directories have this size when empty */ +#define EMPTY_DIR_SIZE_V1 (DEH_SIZE * 2 + 3) + +#define DEH_Statdata 0 /* not used now */ +#define DEH_Visible 2 + +/* 64 bit systems (and the S/390) need to be aligned explicitly -jdm */ +#if BITS_PER_LONG == 64 || defined(__s390__) || defined(__hppa__) +# define ADDR_UNALIGNED_BITS (3) +#endif + +/* These are only used to manipulate deh_state. + * Because of this, we'll use the ext2_ bit routines, + * since they are little endian */ +#ifdef ADDR_UNALIGNED_BITS + +# define aligned_address(addr) ((void *)((long)(addr) & ~((1UL << ADDR_UNALIGNED_BITS) - 1))) +# define unaligned_offset(addr) (((int)((long)(addr) & ((1 << ADDR_UNALIGNED_BITS) - 1))) << 3) + +# define set_bit_unaligned(nr, addr) \ + __test_and_set_bit_le((nr) + unaligned_offset(addr), aligned_address(addr)) +# define clear_bit_unaligned(nr, addr) \ + __test_and_clear_bit_le((nr) + unaligned_offset(addr), aligned_address(addr)) +# define test_bit_unaligned(nr, addr) \ + test_bit_le((nr) + unaligned_offset(addr), aligned_address(addr)) + +#else + +# define set_bit_unaligned(nr, addr) __test_and_set_bit_le(nr, addr) +# define clear_bit_unaligned(nr, addr) __test_and_clear_bit_le(nr, addr) +# define test_bit_unaligned(nr, addr) test_bit_le(nr, addr) + +#endif + +#define mark_de_with_sd(deh) set_bit_unaligned (DEH_Statdata, &((deh)->deh_state)) +#define mark_de_without_sd(deh) clear_bit_unaligned (DEH_Statdata, &((deh)->deh_state)) +#define mark_de_visible(deh) set_bit_unaligned (DEH_Visible, &((deh)->deh_state)) +#define mark_de_hidden(deh) clear_bit_unaligned (DEH_Visible, &((deh)->deh_state)) + +#define de_with_sd(deh) test_bit_unaligned (DEH_Statdata, &((deh)->deh_state)) +#define de_visible(deh) test_bit_unaligned (DEH_Visible, &((deh)->deh_state)) +#define de_hidden(deh) !test_bit_unaligned (DEH_Visible, &((deh)->deh_state)) + +extern void make_empty_dir_item_v1(char *body, __le32 dirid, __le32 objid, + __le32 par_dirid, __le32 par_objid); +extern void make_empty_dir_item(char *body, __le32 dirid, __le32 objid, + __le32 par_dirid, __le32 par_objid); + +/* array of the entry headers */ + /* get item body */ +#define B_I_PITEM(bh,ih) ( (bh)->b_data + ih_location(ih) ) +#define B_I_DEH(bh,ih) ((struct reiserfs_de_head *)(B_I_PITEM(bh,ih))) + +/* length of the directory entry in directory item. This define + calculates length of i-th directory entry using directory entry + locations from dir entry head. When it calculates length of 0-th + directory entry, it uses length of whole item in place of entry + location of the non-existent following entry in the calculation. + See picture above.*/ +/* +#define I_DEH_N_ENTRY_LENGTH(ih,deh,i) \ +((i) ? (deh_location((deh)-1) - deh_location((deh))) : (ih_item_len((ih)) - deh_location((deh)))) +*/ +static inline int entry_length(const struct buffer_head *bh, + const struct item_head *ih, int pos_in_item) +{ + struct reiserfs_de_head *deh; + + deh = B_I_DEH(bh, ih) + pos_in_item; + if (pos_in_item) + return deh_location(deh - 1) - deh_location(deh); + + return ih_item_len(ih) - deh_location(deh); +} + +/* number of entries in the directory item, depends on ENTRY_COUNT being at the start of directory dynamic data. */ +#define I_ENTRY_COUNT(ih) (ih_entry_count((ih))) + +/* name by bh, ih and entry_num */ +#define B_I_E_NAME(bh,ih,entry_num) ((char *)(bh->b_data + ih_location(ih) + deh_location(B_I_DEH(bh,ih)+(entry_num)))) + +// two entries per block (at least) +#define REISERFS_MAX_NAME(block_size) 255 + +/* this structure is used for operations on directory entries. It is + not a disk structure. */ +/* When reiserfs_find_entry or search_by_entry_key find directory + entry, they return filled reiserfs_dir_entry structure */ +struct reiserfs_dir_entry { + struct buffer_head *de_bh; + int de_item_num; + struct item_head *de_ih; + int de_entry_num; + struct reiserfs_de_head *de_deh; + int de_entrylen; + int de_namelen; + char *de_name; + unsigned long *de_gen_number_bit_string; + + __u32 de_dir_id; + __u32 de_objectid; + + struct cpu_key de_entry_key; +}; + +/* these defines are useful when a particular member of a reiserfs_dir_entry is needed */ + +/* pointer to file name, stored in entry */ +#define B_I_DEH_ENTRY_FILE_NAME(bh,ih,deh) (B_I_PITEM (bh, ih) + deh_location(deh)) + +/* length of name */ +#define I_DEH_N_ENTRY_FILE_NAME_LENGTH(ih,deh,entry_num) \ +(I_DEH_N_ENTRY_LENGTH (ih, deh, entry_num) - (de_with_sd (deh) ? SD_SIZE : 0)) + +/* hash value occupies bits from 7 up to 30 */ +#define GET_HASH_VALUE(offset) ((offset) & 0x7fffff80LL) +/* generation number occupies 7 bits starting from 0 up to 6 */ +#define GET_GENERATION_NUMBER(offset) ((offset) & 0x7fLL) +#define MAX_GENERATION_NUMBER 127 + +#define SET_GENERATION_NUMBER(offset,gen_number) (GET_HASH_VALUE(offset)|(gen_number)) + +/* + * Picture represents an internal node of the reiserfs tree + * ______________________________________________________ + * | | Array of | Array of | Free | + * |block | keys | pointers | space | + * | head | N | N+1 | | + * |______|_______________|___________________|___________| + */ + +/***************************************************************************/ +/* DISK CHILD */ +/***************************************************************************/ +/* Disk child pointer: The pointer from an internal node of the tree + to a node that is on disk. */ +struct disk_child { + __le32 dc_block_number; /* Disk child's block number. */ + __le16 dc_size; /* Disk child's used space. */ + __le16 dc_reserved; +}; + +#define DC_SIZE (sizeof(struct disk_child)) +#define dc_block_number(dc_p) (le32_to_cpu((dc_p)->dc_block_number)) +#define dc_size(dc_p) (le16_to_cpu((dc_p)->dc_size)) +#define put_dc_block_number(dc_p, val) do { (dc_p)->dc_block_number = cpu_to_le32(val); } while(0) +#define put_dc_size(dc_p, val) do { (dc_p)->dc_size = cpu_to_le16(val); } while(0) + +/* Get disk child by buffer header and position in the tree node. */ +#define B_N_CHILD(bh, n_pos) ((struct disk_child *)\ +((bh)->b_data + BLKH_SIZE + B_NR_ITEMS(bh) * KEY_SIZE + DC_SIZE * (n_pos))) + +/* Get disk child number by buffer header and position in the tree node. */ +#define B_N_CHILD_NUM(bh, n_pos) (dc_block_number(B_N_CHILD(bh, n_pos))) +#define PUT_B_N_CHILD_NUM(bh, n_pos, val) \ + (put_dc_block_number(B_N_CHILD(bh, n_pos), val)) + + /* maximal value of field child_size in structure disk_child */ + /* child size is the combined size of all items and their headers */ +#define MAX_CHILD_SIZE(bh) ((int)( (bh)->b_size - BLKH_SIZE )) + +/* amount of used space in buffer (not including block head) */ +#define B_CHILD_SIZE(cur) (MAX_CHILD_SIZE(cur)-(B_FREE_SPACE(cur))) + +/* max and min number of keys in internal node */ +#define MAX_NR_KEY(bh) ( (MAX_CHILD_SIZE(bh)-DC_SIZE)/(KEY_SIZE+DC_SIZE) ) +#define MIN_NR_KEY(bh) (MAX_NR_KEY(bh)/2) + +/***************************************************************************/ +/* PATH STRUCTURES AND DEFINES */ +/***************************************************************************/ + +/* Search_by_key fills up the path from the root to the leaf as it descends the tree looking for the + key. It uses reiserfs_bread to try to find buffers in the cache given their block number. If it + does not find them in the cache it reads them from disk. For each node search_by_key finds using + reiserfs_bread it then uses bin_search to look through that node. bin_search will find the + position of the block_number of the next node if it is looking through an internal node. If it + is looking through a leaf node bin_search will find the position of the item which has key either + equal to given key, or which is the maximal key less than the given key. */ + +struct path_element { + struct buffer_head *pe_buffer; /* Pointer to the buffer at the path in the tree. */ + int pe_position; /* Position in the tree node which is placed in the */ + /* buffer above. */ +}; + +#define MAX_HEIGHT 5 /* maximal height of a tree. don't change this without changing JOURNAL_PER_BALANCE_CNT */ +#define EXTENDED_MAX_HEIGHT 7 /* Must be equals MAX_HEIGHT + FIRST_PATH_ELEMENT_OFFSET */ +#define FIRST_PATH_ELEMENT_OFFSET 2 /* Must be equal to at least 2. */ + +#define ILLEGAL_PATH_ELEMENT_OFFSET 1 /* Must be equal to FIRST_PATH_ELEMENT_OFFSET - 1 */ +#define MAX_FEB_SIZE 6 /* this MUST be MAX_HEIGHT + 1. See about FEB below */ + +/* We need to keep track of who the ancestors of nodes are. When we + perform a search we record which nodes were visited while + descending the tree looking for the node we searched for. This list + of nodes is called the path. This information is used while + performing balancing. Note that this path information may become + invalid, and this means we must check it when using it to see if it + is still valid. You'll need to read search_by_key and the comments + in it, especially about decrement_counters_in_path(), to understand + this structure. + +Paths make the code so much harder to work with and debug.... An +enormous number of bugs are due to them, and trying to write or modify +code that uses them just makes my head hurt. They are based on an +excessive effort to avoid disturbing the precious VFS code.:-( The +gods only know how we are going to SMP the code that uses them. +znodes are the way! */ + +#define PATH_READA 0x1 /* do read ahead */ +#define PATH_READA_BACK 0x2 /* read backwards */ + +struct treepath { + int path_length; /* Length of the array above. */ + int reada; + struct path_element path_elements[EXTENDED_MAX_HEIGHT]; /* Array of the path elements. */ + int pos_in_item; +}; + +#define pos_in_item(path) ((path)->pos_in_item) + +#define INITIALIZE_PATH(var) \ +struct treepath var = {.path_length = ILLEGAL_PATH_ELEMENT_OFFSET, .reada = 0,} + +/* Get path element by path and path position. */ +#define PATH_OFFSET_PELEMENT(path, n_offset) ((path)->path_elements + (n_offset)) + +/* Get buffer header at the path by path and path position. */ +#define PATH_OFFSET_PBUFFER(path, n_offset) (PATH_OFFSET_PELEMENT(path, n_offset)->pe_buffer) + +/* Get position in the element at the path by path and path position. */ +#define PATH_OFFSET_POSITION(path, n_offset) (PATH_OFFSET_PELEMENT(path, n_offset)->pe_position) + +#define PATH_PLAST_BUFFER(path) (PATH_OFFSET_PBUFFER((path), (path)->path_length)) + /* you know, to the person who didn't + write this the macro name does not + at first suggest what it does. + Maybe POSITION_FROM_PATH_END? Or + maybe we should just focus on + dumping paths... -Hans */ +#define PATH_LAST_POSITION(path) (PATH_OFFSET_POSITION((path), (path)->path_length)) + +#define PATH_PITEM_HEAD(path) B_N_PITEM_HEAD(PATH_PLAST_BUFFER(path), PATH_LAST_POSITION(path)) + +/* in do_balance leaf has h == 0 in contrast with path structure, + where root has level == 0. That is why we need these defines */ +#define PATH_H_PBUFFER(path, h) PATH_OFFSET_PBUFFER (path, path->path_length - (h)) /* tb->S[h] */ +#define PATH_H_PPARENT(path, h) PATH_H_PBUFFER (path, (h) + 1) /* tb->F[h] or tb->S[0]->b_parent */ +#define PATH_H_POSITION(path, h) PATH_OFFSET_POSITION (path, path->path_length - (h)) +#define PATH_H_B_ITEM_ORDER(path, h) PATH_H_POSITION(path, h + 1) /* tb->S[h]->b_item_order */ + +#define PATH_H_PATH_OFFSET(path, n_h) ((path)->path_length - (n_h)) + +#define get_last_bh(path) PATH_PLAST_BUFFER(path) +#define get_ih(path) PATH_PITEM_HEAD(path) +#define get_item_pos(path) PATH_LAST_POSITION(path) +#define get_item(path) ((void *)B_N_PITEM(PATH_PLAST_BUFFER(path), PATH_LAST_POSITION (path))) +#define item_moved(ih,path) comp_items(ih, path) +#define path_changed(ih,path) comp_items (ih, path) + +/***************************************************************************/ +/* MISC */ +/***************************************************************************/ + +/* Size of pointer to the unformatted node. */ +#define UNFM_P_SIZE (sizeof(unp_t)) +#define UNFM_P_SHIFT 2 + +// in in-core inode key is stored on le form +#define INODE_PKEY(inode) ((struct reiserfs_key *)(REISERFS_I(inode)->i_key)) + +#define MAX_UL_INT 0xffffffff +#define MAX_INT 0x7ffffff +#define MAX_US_INT 0xffff + +// reiserfs version 2 has max offset 60 bits. Version 1 - 32 bit offset +#define U32_MAX (~(__u32)0) + +static inline loff_t max_reiserfs_offset(struct inode *inode) +{ + if (get_inode_item_key_version(inode) == KEY_FORMAT_3_5) + return (loff_t) U32_MAX; + + return (loff_t) ((~(__u64) 0) >> 4); +} + +/*#define MAX_KEY_UNIQUENESS MAX_UL_INT*/ +#define MAX_KEY_OBJECTID MAX_UL_INT + +#define MAX_B_NUM MAX_UL_INT +#define MAX_FC_NUM MAX_US_INT + +/* the purpose is to detect overflow of an unsigned short */ +#define REISERFS_LINK_MAX (MAX_US_INT - 1000) + +/* The following defines are used in reiserfs_insert_item and reiserfs_append_item */ +#define REISERFS_KERNEL_MEM 0 /* reiserfs kernel memory mode */ +#define REISERFS_USER_MEM 1 /* reiserfs user memory mode */ + +#define fs_generation(s) (REISERFS_SB(s)->s_generation_counter) +#define get_generation(s) atomic_read (&fs_generation(s)) +#define FILESYSTEM_CHANGED_TB(tb) (get_generation((tb)->tb_sb) != (tb)->fs_gen) +#define __fs_changed(gen,s) (gen != get_generation (s)) +#define fs_changed(gen,s) \ +({ \ + reiserfs_cond_resched(s); \ + __fs_changed(gen, s); \ +}) + +/***************************************************************************/ +/* FIXATE NODES */ +/***************************************************************************/ + +#define VI_TYPE_LEFT_MERGEABLE 1 +#define VI_TYPE_RIGHT_MERGEABLE 2 + +/* To make any changes in the tree we always first find node, that + contains item to be changed/deleted or place to insert a new + item. We call this node S. To do balancing we need to decide what + we will shift to left/right neighbor, or to a new node, where new + item will be etc. To make this analysis simpler we build virtual + node. Virtual node is an array of items, that will replace items of + node S. (For instance if we are going to delete an item, virtual + node does not contain it). Virtual node keeps information about + item sizes and types, mergeability of first and last items, sizes + of all entries in directory item. We use this array of items when + calculating what we can shift to neighbors and how many nodes we + have to have if we do not any shiftings, if we shift to left/right + neighbor or to both. */ +struct virtual_item { + int vi_index; // index in the array of item operations + unsigned short vi_type; // left/right mergeability + unsigned short vi_item_len; /* length of item that it will have after balancing */ + struct item_head *vi_ih; + const char *vi_item; // body of item (old or new) + const void *vi_new_data; // 0 always but paste mode + void *vi_uarea; // item specific area +}; + +struct virtual_node { + char *vn_free_ptr; /* this is a pointer to the free space in the buffer */ + unsigned short vn_nr_item; /* number of items in virtual node */ + short vn_size; /* size of node , that node would have if it has unlimited size and no balancing is performed */ + short vn_mode; /* mode of balancing (paste, insert, delete, cut) */ + short vn_affected_item_num; + short vn_pos_in_item; + struct item_head *vn_ins_ih; /* item header of inserted item, 0 for other modes */ + const void *vn_data; + struct virtual_item *vn_vi; /* array of items (including a new one, excluding item to be deleted) */ +}; + +/* used by directory items when creating virtual nodes */ +struct direntry_uarea { + int flags; + __u16 entry_count; + __u16 entry_sizes[1]; +} __attribute__ ((__packed__)); + +/***************************************************************************/ +/* TREE BALANCE */ +/***************************************************************************/ + +/* This temporary structure is used in tree balance algorithms, and + constructed as we go to the extent that its various parts are + needed. It contains arrays of nodes that can potentially be + involved in the balancing of node S, and parameters that define how + each of the nodes must be balanced. Note that in these algorithms + for balancing the worst case is to need to balance the current node + S and the left and right neighbors and all of their parents plus + create a new node. We implement S1 balancing for the leaf nodes + and S0 balancing for the internal nodes (S1 and S0 are defined in + our papers.)*/ + +#define MAX_FREE_BLOCK 7 /* size of the array of buffers to free at end of do_balance */ + +/* maximum number of FEB blocknrs on a single level */ +#define MAX_AMOUNT_NEEDED 2 + +/* someday somebody will prefix every field in this struct with tb_ */ +struct tree_balance { + int tb_mode; + int need_balance_dirty; + struct super_block *tb_sb; + struct reiserfs_transaction_handle *transaction_handle; + struct treepath *tb_path; + struct buffer_head *L[MAX_HEIGHT]; /* array of left neighbors of nodes in the path */ + struct buffer_head *R[MAX_HEIGHT]; /* array of right neighbors of nodes in the path */ + struct buffer_head *FL[MAX_HEIGHT]; /* array of fathers of the left neighbors */ + struct buffer_head *FR[MAX_HEIGHT]; /* array of fathers of the right neighbors */ + struct buffer_head *CFL[MAX_HEIGHT]; /* array of common parents of center node and its left neighbor */ + struct buffer_head *CFR[MAX_HEIGHT]; /* array of common parents of center node and its right neighbor */ + + struct buffer_head *FEB[MAX_FEB_SIZE]; /* array of empty buffers. Number of buffers in array equals + cur_blknum. */ + struct buffer_head *used[MAX_FEB_SIZE]; + struct buffer_head *thrown[MAX_FEB_SIZE]; + int lnum[MAX_HEIGHT]; /* array of number of items which must be + shifted to the left in order to balance the + current node; for leaves includes item that + will be partially shifted; for internal + nodes, it is the number of child pointers + rather than items. It includes the new item + being created. The code sometimes subtracts + one to get the number of wholly shifted + items for other purposes. */ + int rnum[MAX_HEIGHT]; /* substitute right for left in comment above */ + int lkey[MAX_HEIGHT]; /* array indexed by height h mapping the key delimiting L[h] and + S[h] to its item number within the node CFL[h] */ + int rkey[MAX_HEIGHT]; /* substitute r for l in comment above */ + int insert_size[MAX_HEIGHT]; /* the number of bytes by we are trying to add or remove from + S[h]. A negative value means removing. */ + int blknum[MAX_HEIGHT]; /* number of nodes that will replace node S[h] after + balancing on the level h of the tree. If 0 then S is + being deleted, if 1 then S is remaining and no new nodes + are being created, if 2 or 3 then 1 or 2 new nodes is + being created */ + + /* fields that are used only for balancing leaves of the tree */ + int cur_blknum; /* number of empty blocks having been already allocated */ + int s0num; /* number of items that fall into left most node when S[0] splits */ + int s1num; /* number of items that fall into first new node when S[0] splits */ + int s2num; /* number of items that fall into second new node when S[0] splits */ + int lbytes; /* number of bytes which can flow to the left neighbor from the left */ + /* most liquid item that cannot be shifted from S[0] entirely */ + /* if -1 then nothing will be partially shifted */ + int rbytes; /* number of bytes which will flow to the right neighbor from the right */ + /* most liquid item that cannot be shifted from S[0] entirely */ + /* if -1 then nothing will be partially shifted */ + int s1bytes; /* number of bytes which flow to the first new node when S[0] splits */ + /* note: if S[0] splits into 3 nodes, then items do not need to be cut */ + int s2bytes; + struct buffer_head *buf_to_free[MAX_FREE_BLOCK]; /* buffers which are to be freed after do_balance finishes by unfix_nodes */ + char *vn_buf; /* kmalloced memory. Used to create + virtual node and keep map of + dirtied bitmap blocks */ + int vn_buf_size; /* size of the vn_buf */ + struct virtual_node *tb_vn; /* VN starts after bitmap of bitmap blocks */ + + int fs_gen; /* saved value of `reiserfs_generation' counter + see FILESYSTEM_CHANGED() macro in reiserfs_fs.h */ +#ifdef DISPLACE_NEW_PACKING_LOCALITIES + struct in_core_key key; /* key pointer, to pass to block allocator or + another low-level subsystem */ +#endif +}; + +/* These are modes of balancing */ + +/* When inserting an item. */ +#define M_INSERT 'i' +/* When inserting into (directories only) or appending onto an already + existent item. */ +#define M_PASTE 'p' +/* When deleting an item. */ +#define M_DELETE 'd' +/* When truncating an item or removing an entry from a (directory) item. */ +#define M_CUT 'c' + +/* used when balancing on leaf level skipped (in reiserfsck) */ +#define M_INTERNAL 'n' + +/* When further balancing is not needed, then do_balance does not need + to be called. */ +#define M_SKIP_BALANCING 's' +#define M_CONVERT 'v' + +/* modes of leaf_move_items */ +#define LEAF_FROM_S_TO_L 0 +#define LEAF_FROM_S_TO_R 1 +#define LEAF_FROM_R_TO_L 2 +#define LEAF_FROM_L_TO_R 3 +#define LEAF_FROM_S_TO_SNEW 4 + +#define FIRST_TO_LAST 0 +#define LAST_TO_FIRST 1 + +/* used in do_balance for passing parent of node information that has + been gotten from tb struct */ +struct buffer_info { + struct tree_balance *tb; + struct buffer_head *bi_bh; + struct buffer_head *bi_parent; + int bi_position; +}; + +static inline struct super_block *sb_from_tb(struct tree_balance *tb) +{ + return tb ? tb->tb_sb : NULL; +} + +static inline struct super_block *sb_from_bi(struct buffer_info *bi) +{ + return bi ? sb_from_tb(bi->tb) : NULL; +} + +/* there are 4 types of items: stat data, directory item, indirect, direct. ++-------------------+------------+--------------+------------+ +| | k_offset | k_uniqueness | mergeable? | ++-------------------+------------+--------------+------------+ +| stat data | 0 | 0 | no | ++-------------------+------------+--------------+------------+ +| 1st directory item| DOT_OFFSET |DIRENTRY_UNIQUENESS| no | +| non 1st directory | hash value | | yes | +| item | | | | ++-------------------+------------+--------------+------------+ +| indirect item | offset + 1 |TYPE_INDIRECT | if this is not the first indirect item of the object ++-------------------+------------+--------------+------------+ +| direct item | offset + 1 |TYPE_DIRECT | if not this is not the first direct item of the object ++-------------------+------------+--------------+------------+ +*/ + +struct item_operations { + int (*bytes_number) (struct item_head * ih, int block_size); + void (*decrement_key) (struct cpu_key *); + int (*is_left_mergeable) (struct reiserfs_key * ih, + unsigned long bsize); + void (*print_item) (struct item_head *, char *item); + void (*check_item) (struct item_head *, char *item); + + int (*create_vi) (struct virtual_node * vn, struct virtual_item * vi, + int is_affected, int insert_size); + int (*check_left) (struct virtual_item * vi, int free, + int start_skip, int end_skip); + int (*check_right) (struct virtual_item * vi, int free); + int (*part_size) (struct virtual_item * vi, int from, int to); + int (*unit_num) (struct virtual_item * vi); + void (*print_vi) (struct virtual_item * vi); +}; + +extern struct item_operations *item_ops[TYPE_ANY + 1]; + +#define op_bytes_number(ih,bsize) item_ops[le_ih_k_type (ih)]->bytes_number (ih, bsize) +#define op_is_left_mergeable(key,bsize) item_ops[le_key_k_type (le_key_version (key), key)]->is_left_mergeable (key, bsize) +#define op_print_item(ih,item) item_ops[le_ih_k_type (ih)]->print_item (ih, item) +#define op_check_item(ih,item) item_ops[le_ih_k_type (ih)]->check_item (ih, item) +#define op_create_vi(vn,vi,is_affected,insert_size) item_ops[le_ih_k_type ((vi)->vi_ih)]->create_vi (vn,vi,is_affected,insert_size) +#define op_check_left(vi,free,start_skip,end_skip) item_ops[(vi)->vi_index]->check_left (vi, free, start_skip, end_skip) +#define op_check_right(vi,free) item_ops[(vi)->vi_index]->check_right (vi, free) +#define op_part_size(vi,from,to) item_ops[(vi)->vi_index]->part_size (vi, from, to) +#define op_unit_num(vi) item_ops[(vi)->vi_index]->unit_num (vi) +#define op_print_vi(vi) item_ops[(vi)->vi_index]->print_vi (vi) + +#define COMP_SHORT_KEYS comp_short_keys + +/* number of blocks pointed to by the indirect item */ +#define I_UNFM_NUM(ih) (ih_item_len(ih) / UNFM_P_SIZE) + +/* the used space within the unformatted node corresponding to pos within the item pointed to by ih */ +#define I_POS_UNFM_SIZE(ih,pos,size) (((pos) == I_UNFM_NUM(ih) - 1 ) ? (size) - ih_free_space(ih) : (size)) + +/* number of bytes contained by the direct item or the unformatted nodes the indirect item points to */ + +/* get the item header */ +#define B_N_PITEM_HEAD(bh,item_num) ( (struct item_head * )((bh)->b_data + BLKH_SIZE) + (item_num) ) + +/* get key */ +#define B_N_PDELIM_KEY(bh,item_num) ( (struct reiserfs_key * )((bh)->b_data + BLKH_SIZE) + (item_num) ) + +/* get the key */ +#define B_N_PKEY(bh,item_num) ( &(B_N_PITEM_HEAD(bh,item_num)->ih_key) ) + +/* get item body */ +#define B_N_PITEM(bh,item_num) ( (bh)->b_data + ih_location(B_N_PITEM_HEAD((bh),(item_num)))) + +/* get the stat data by the buffer header and the item order */ +#define B_N_STAT_DATA(bh,nr) \ +( (struct stat_data *)((bh)->b_data + ih_location(B_N_PITEM_HEAD((bh),(nr))) ) ) + + /* following defines use reiserfs buffer header and item header */ + +/* get stat-data */ +#define B_I_STAT_DATA(bh, ih) ( (struct stat_data * )((bh)->b_data + ih_location(ih)) ) + +// this is 3976 for size==4096 +#define MAX_DIRECT_ITEM_LEN(size) ((size) - BLKH_SIZE - 2*IH_SIZE - SD_SIZE - UNFM_P_SIZE) + +/* indirect items consist of entries which contain blocknrs, pos + indicates which entry, and B_I_POS_UNFM_POINTER resolves to the + blocknr contained by the entry pos points to */ +#define B_I_POS_UNFM_POINTER(bh,ih,pos) le32_to_cpu(*(((unp_t *)B_I_PITEM(bh,ih)) + (pos))) +#define PUT_B_I_POS_UNFM_POINTER(bh,ih,pos, val) do {*(((unp_t *)B_I_PITEM(bh,ih)) + (pos)) = cpu_to_le32(val); } while (0) + +struct reiserfs_iget_args { + __u32 objectid; + __u32 dirid; +}; + +/***************************************************************************/ +/* FUNCTION DECLARATIONS */ +/***************************************************************************/ + +#define get_journal_desc_magic(bh) (bh->b_data + bh->b_size - 12) + +#define journal_trans_half(blocksize) \ + ((blocksize - sizeof (struct reiserfs_journal_desc) + sizeof (__u32) - 12) / sizeof (__u32)) + +/* journal.c see journal.c for all the comments here */ + +/* first block written in a commit. */ +struct reiserfs_journal_desc { + __le32 j_trans_id; /* id of commit */ + __le32 j_len; /* length of commit. len +1 is the commit block */ + __le32 j_mount_id; /* mount id of this trans */ + __le32 j_realblock[1]; /* real locations for each block */ +}; + +#define get_desc_trans_id(d) le32_to_cpu((d)->j_trans_id) +#define get_desc_trans_len(d) le32_to_cpu((d)->j_len) +#define get_desc_mount_id(d) le32_to_cpu((d)->j_mount_id) + +#define set_desc_trans_id(d,val) do { (d)->j_trans_id = cpu_to_le32 (val); } while (0) +#define set_desc_trans_len(d,val) do { (d)->j_len = cpu_to_le32 (val); } while (0) +#define set_desc_mount_id(d,val) do { (d)->j_mount_id = cpu_to_le32 (val); } while (0) + +/* last block written in a commit */ +struct reiserfs_journal_commit { + __le32 j_trans_id; /* must match j_trans_id from the desc block */ + __le32 j_len; /* ditto */ + __le32 j_realblock[1]; /* real locations for each block */ +}; + +#define get_commit_trans_id(c) le32_to_cpu((c)->j_trans_id) +#define get_commit_trans_len(c) le32_to_cpu((c)->j_len) +#define get_commit_mount_id(c) le32_to_cpu((c)->j_mount_id) + +#define set_commit_trans_id(c,val) do { (c)->j_trans_id = cpu_to_le32 (val); } while (0) +#define set_commit_trans_len(c,val) do { (c)->j_len = cpu_to_le32 (val); } while (0) + +/* this header block gets written whenever a transaction is considered fully flushed, and is more recent than the +** last fully flushed transaction. fully flushed means all the log blocks and all the real blocks are on disk, +** and this transaction does not need to be replayed. +*/ +struct reiserfs_journal_header { + __le32 j_last_flush_trans_id; /* id of last fully flushed transaction */ + __le32 j_first_unflushed_offset; /* offset in the log of where to start replay after a crash */ + __le32 j_mount_id; + /* 12 */ struct journal_params jh_journal; +}; + +/* biggest tunable defines are right here */ +#define JOURNAL_BLOCK_COUNT 8192 /* number of blocks in the journal */ +#define JOURNAL_TRANS_MAX_DEFAULT 1024 /* biggest possible single transaction, don't change for now (8/3/99) */ +#define JOURNAL_TRANS_MIN_DEFAULT 256 +#define JOURNAL_MAX_BATCH_DEFAULT 900 /* max blocks to batch into one transaction, don't make this any bigger than 900 */ +#define JOURNAL_MIN_RATIO 2 +#define JOURNAL_MAX_COMMIT_AGE 30 +#define JOURNAL_MAX_TRANS_AGE 30 +#define JOURNAL_PER_BALANCE_CNT (3 * (MAX_HEIGHT-2) + 9) +#define JOURNAL_BLOCKS_PER_OBJECT(sb) (JOURNAL_PER_BALANCE_CNT * 3 + \ + 2 * (REISERFS_QUOTA_INIT_BLOCKS(sb) + \ + REISERFS_QUOTA_TRANS_BLOCKS(sb))) + +#ifdef CONFIG_QUOTA +#define REISERFS_QUOTA_OPTS ((1 << REISERFS_USRQUOTA) | (1 << REISERFS_GRPQUOTA)) +/* We need to update data and inode (atime) */ +#define REISERFS_QUOTA_TRANS_BLOCKS(s) (REISERFS_SB(s)->s_mount_opt & REISERFS_QUOTA_OPTS ? 2 : 0) +/* 1 balancing, 1 bitmap, 1 data per write + stat data update */ +#define REISERFS_QUOTA_INIT_BLOCKS(s) (REISERFS_SB(s)->s_mount_opt & REISERFS_QUOTA_OPTS ? \ +(DQUOT_INIT_ALLOC*(JOURNAL_PER_BALANCE_CNT+2)+DQUOT_INIT_REWRITE+1) : 0) +/* same as with INIT */ +#define REISERFS_QUOTA_DEL_BLOCKS(s) (REISERFS_SB(s)->s_mount_opt & REISERFS_QUOTA_OPTS ? \ +(DQUOT_DEL_ALLOC*(JOURNAL_PER_BALANCE_CNT+2)+DQUOT_DEL_REWRITE+1) : 0) +#else +#define REISERFS_QUOTA_TRANS_BLOCKS(s) 0 +#define REISERFS_QUOTA_INIT_BLOCKS(s) 0 +#define REISERFS_QUOTA_DEL_BLOCKS(s) 0 +#endif + +/* both of these can be as low as 1, or as high as you want. The min is the +** number of 4k bitmap nodes preallocated on mount. New nodes are allocated +** as needed, and released when transactions are committed. On release, if +** the current number of nodes is > max, the node is freed, otherwise, +** it is put on a free list for faster use later. +*/ +#define REISERFS_MIN_BITMAP_NODES 10 +#define REISERFS_MAX_BITMAP_NODES 100 + +#define JBH_HASH_SHIFT 13 /* these are based on journal hash size of 8192 */ +#define JBH_HASH_MASK 8191 + +#define _jhashfn(sb,block) \ + (((unsigned long)sb>>L1_CACHE_SHIFT) ^ \ + (((block)<<(JBH_HASH_SHIFT - 6)) ^ ((block) >> 13) ^ ((block) << (JBH_HASH_SHIFT - 12)))) +#define journal_hash(t,sb,block) ((t)[_jhashfn((sb),(block)) & JBH_HASH_MASK]) + +// We need these to make journal.c code more readable +#define journal_find_get_block(s, block) __find_get_block(SB_JOURNAL(s)->j_dev_bd, block, s->s_blocksize) +#define journal_getblk(s, block) __getblk(SB_JOURNAL(s)->j_dev_bd, block, s->s_blocksize) +#define journal_bread(s, block) __bread(SB_JOURNAL(s)->j_dev_bd, block, s->s_blocksize) + +enum reiserfs_bh_state_bits { + BH_JDirty = BH_PrivateStart, /* buffer is in current transaction */ + BH_JDirty_wait, + BH_JNew, /* disk block was taken off free list before + * being in a finished transaction, or + * written to disk. Can be reused immed. */ + BH_JPrepared, + BH_JRestore_dirty, + BH_JTest, // debugging only will go away +}; + +BUFFER_FNS(JDirty, journaled); +TAS_BUFFER_FNS(JDirty, journaled); +BUFFER_FNS(JDirty_wait, journal_dirty); +TAS_BUFFER_FNS(JDirty_wait, journal_dirty); +BUFFER_FNS(JNew, journal_new); +TAS_BUFFER_FNS(JNew, journal_new); +BUFFER_FNS(JPrepared, journal_prepared); +TAS_BUFFER_FNS(JPrepared, journal_prepared); +BUFFER_FNS(JRestore_dirty, journal_restore_dirty); +TAS_BUFFER_FNS(JRestore_dirty, journal_restore_dirty); +BUFFER_FNS(JTest, journal_test); +TAS_BUFFER_FNS(JTest, journal_test); + +/* +** transaction handle which is passed around for all journal calls +*/ +struct reiserfs_transaction_handle { + struct super_block *t_super; /* super for this FS when journal_begin was + called. saves calls to reiserfs_get_super + also used by nested transactions to make + sure they are nesting on the right FS + _must_ be first in the handle + */ + int t_refcount; + int t_blocks_logged; /* number of blocks this writer has logged */ + int t_blocks_allocated; /* number of blocks this writer allocated */ + unsigned int t_trans_id; /* sanity check, equals the current trans id */ + void *t_handle_save; /* save existing current->journal_info */ + unsigned displace_new_blocks:1; /* if new block allocation occurres, that block + should be displaced from others */ + struct list_head t_list; +}; + +/* used to keep track of ordered and tail writes, attached to the buffer + * head through b_journal_head. + */ +struct reiserfs_jh { + struct reiserfs_journal_list *jl; + struct buffer_head *bh; + struct list_head list; +}; + +void reiserfs_free_jh(struct buffer_head *bh); +int reiserfs_add_tail_list(struct inode *inode, struct buffer_head *bh); +int reiserfs_add_ordered_list(struct inode *inode, struct buffer_head *bh); +int journal_mark_dirty(struct reiserfs_transaction_handle *, + struct super_block *, struct buffer_head *bh); + +static inline int reiserfs_file_data_log(struct inode *inode) +{ + if (reiserfs_data_log(inode->i_sb) || + (REISERFS_I(inode)->i_flags & i_data_log)) + return 1; + return 0; +} + +static inline int reiserfs_transaction_running(struct super_block *s) +{ + struct reiserfs_transaction_handle *th = current->journal_info; + if (th && th->t_super == s) + return 1; + if (th && th->t_super == NULL) + BUG(); + return 0; +} + +static inline int reiserfs_transaction_free_space(struct reiserfs_transaction_handle *th) +{ + return th->t_blocks_allocated - th->t_blocks_logged; +} + +struct reiserfs_transaction_handle *reiserfs_persistent_transaction(struct + super_block + *, + int count); +int reiserfs_end_persistent_transaction(struct reiserfs_transaction_handle *); +int reiserfs_commit_page(struct inode *inode, struct page *page, + unsigned from, unsigned to); +int reiserfs_flush_old_commits(struct super_block *); +int reiserfs_commit_for_inode(struct inode *); +int reiserfs_inode_needs_commit(struct inode *); +void reiserfs_update_inode_transaction(struct inode *); +void reiserfs_wait_on_write_block(struct super_block *s); +void reiserfs_block_writes(struct reiserfs_transaction_handle *th); +void reiserfs_allow_writes(struct super_block *s); +void reiserfs_check_lock_depth(struct super_block *s, char *caller); +int reiserfs_prepare_for_journal(struct super_block *, struct buffer_head *bh, + int wait); +void reiserfs_restore_prepared_buffer(struct super_block *, + struct buffer_head *bh); +int journal_init(struct super_block *, const char *j_dev_name, int old_format, + unsigned int); +int journal_release(struct reiserfs_transaction_handle *, struct super_block *); +int journal_release_error(struct reiserfs_transaction_handle *, + struct super_block *); +int journal_end(struct reiserfs_transaction_handle *, struct super_block *, + unsigned long); +int journal_end_sync(struct reiserfs_transaction_handle *, struct super_block *, + unsigned long); +int journal_mark_freed(struct reiserfs_transaction_handle *, + struct super_block *, b_blocknr_t blocknr); +int journal_transaction_should_end(struct reiserfs_transaction_handle *, int); +int reiserfs_in_journal(struct super_block *sb, unsigned int bmap_nr, + int bit_nr, int searchall, b_blocknr_t *next); +int journal_begin(struct reiserfs_transaction_handle *, + struct super_block *sb, unsigned long); +int journal_join_abort(struct reiserfs_transaction_handle *, + struct super_block *sb, unsigned long); +void reiserfs_abort_journal(struct super_block *sb, int errno); +void reiserfs_abort(struct super_block *sb, int errno, const char *fmt, ...); +int reiserfs_allocate_list_bitmaps(struct super_block *s, + struct reiserfs_list_bitmap *, unsigned int); + +void add_save_link(struct reiserfs_transaction_handle *th, + struct inode *inode, int truncate); +int remove_save_link(struct inode *inode, int truncate); + +/* objectid.c */ +__u32 reiserfs_get_unused_objectid(struct reiserfs_transaction_handle *th); +void reiserfs_release_objectid(struct reiserfs_transaction_handle *th, + __u32 objectid_to_release); +int reiserfs_convert_objectid_map_v1(struct super_block *); + +/* stree.c */ +int B_IS_IN_TREE(const struct buffer_head *); +extern void copy_item_head(struct item_head *to, + const struct item_head *from); + +// first key is in cpu form, second - le +extern int comp_short_keys(const struct reiserfs_key *le_key, + const struct cpu_key *cpu_key); +extern void le_key2cpu_key(struct cpu_key *to, const struct reiserfs_key *from); + +// both are in le form +extern int comp_le_keys(const struct reiserfs_key *, + const struct reiserfs_key *); +extern int comp_short_le_keys(const struct reiserfs_key *, + const struct reiserfs_key *); + +// +// get key version from on disk key - kludge +// +static inline int le_key_version(const struct reiserfs_key *key) +{ + int type; + + type = offset_v2_k_type(&(key->u.k_offset_v2)); + if (type != TYPE_DIRECT && type != TYPE_INDIRECT + && type != TYPE_DIRENTRY) + return KEY_FORMAT_3_5; + + return KEY_FORMAT_3_6; + +} + +static inline void copy_key(struct reiserfs_key *to, + const struct reiserfs_key *from) +{ + memcpy(to, from, KEY_SIZE); +} + +int comp_items(const struct item_head *stored_ih, const struct treepath *path); +const struct reiserfs_key *get_rkey(const struct treepath *chk_path, + const struct super_block *sb); +int search_by_key(struct super_block *, const struct cpu_key *, + struct treepath *, int); +#define search_item(s,key,path) search_by_key (s, key, path, DISK_LEAF_NODE_LEVEL) +int search_for_position_by_key(struct super_block *sb, + const struct cpu_key *cpu_key, + struct treepath *search_path); +extern void decrement_bcount(struct buffer_head *bh); +void decrement_counters_in_path(struct treepath *search_path); +void pathrelse(struct treepath *search_path); +int reiserfs_check_path(struct treepath *p); +void pathrelse_and_restore(struct super_block *s, struct treepath *search_path); + +int reiserfs_insert_item(struct reiserfs_transaction_handle *th, + struct treepath *path, + const struct cpu_key *key, + struct item_head *ih, + struct inode *inode, const char *body); + +int reiserfs_paste_into_item(struct reiserfs_transaction_handle *th, + struct treepath *path, + const struct cpu_key *key, + struct inode *inode, + const char *body, int paste_size); + +int reiserfs_cut_from_item(struct reiserfs_transaction_handle *th, + struct treepath *path, + struct cpu_key *key, + struct inode *inode, + struct page *page, loff_t new_file_size); + +int reiserfs_delete_item(struct reiserfs_transaction_handle *th, + struct treepath *path, + const struct cpu_key *key, + struct inode *inode, struct buffer_head *un_bh); + +void reiserfs_delete_solid_item(struct reiserfs_transaction_handle *th, + struct inode *inode, struct reiserfs_key *key); +int reiserfs_delete_object(struct reiserfs_transaction_handle *th, + struct inode *inode); +int reiserfs_do_truncate(struct reiserfs_transaction_handle *th, + struct inode *inode, struct page *, + int update_timestamps); + +#define i_block_size(inode) ((inode)->i_sb->s_blocksize) +#define file_size(inode) ((inode)->i_size) +#define tail_size(inode) (file_size (inode) & (i_block_size (inode) - 1)) + +#define tail_has_to_be_packed(inode) (have_large_tails ((inode)->i_sb)?\ +!STORE_TAIL_IN_UNFM_S1(file_size (inode), tail_size(inode), inode->i_sb->s_blocksize):have_small_tails ((inode)->i_sb)?!STORE_TAIL_IN_UNFM_S2(file_size (inode), tail_size(inode), inode->i_sb->s_blocksize):0 ) + +void padd_item(char *item, int total_length, int length); + +/* inode.c */ +/* args for the create parameter of reiserfs_get_block */ +#define GET_BLOCK_NO_CREATE 0 /* don't create new blocks or convert tails */ +#define GET_BLOCK_CREATE 1 /* add anything you need to find block */ +#define GET_BLOCK_NO_HOLE 2 /* return -ENOENT for file holes */ +#define GET_BLOCK_READ_DIRECT 4 /* read the tail if indirect item not found */ +#define GET_BLOCK_NO_IMUX 8 /* i_mutex is not held, don't preallocate */ +#define GET_BLOCK_NO_DANGLE 16 /* don't leave any transactions running */ + +void reiserfs_read_locked_inode(struct inode *inode, + struct reiserfs_iget_args *args); +int reiserfs_find_actor(struct inode *inode, void *p); +int reiserfs_init_locked_inode(struct inode *inode, void *p); +void reiserfs_evict_inode(struct inode *inode); +int reiserfs_write_inode(struct inode *inode, struct writeback_control *wbc); +int reiserfs_get_block(struct inode *inode, sector_t block, + struct buffer_head *bh_result, int create); +struct dentry *reiserfs_fh_to_dentry(struct super_block *sb, struct fid *fid, + int fh_len, int fh_type); +struct dentry *reiserfs_fh_to_parent(struct super_block *sb, struct fid *fid, + int fh_len, int fh_type); +int reiserfs_encode_fh(struct dentry *dentry, __u32 * data, int *lenp, + int connectable); + +int reiserfs_truncate_file(struct inode *, int update_timestamps); +void make_cpu_key(struct cpu_key *cpu_key, struct inode *inode, loff_t offset, + int type, int key_length); +void make_le_item_head(struct item_head *ih, const struct cpu_key *key, + int version, + loff_t offset, int type, int length, int entry_count); +struct inode *reiserfs_iget(struct super_block *s, const struct cpu_key *key); + +struct reiserfs_security_handle; +int reiserfs_new_inode(struct reiserfs_transaction_handle *th, + struct inode *dir, umode_t mode, + const char *symname, loff_t i_size, + struct dentry *dentry, struct inode *inode, + struct reiserfs_security_handle *security); + +void reiserfs_update_sd_size(struct reiserfs_transaction_handle *th, + struct inode *inode, loff_t size); + +static inline void reiserfs_update_sd(struct reiserfs_transaction_handle *th, + struct inode *inode) +{ + reiserfs_update_sd_size(th, inode, inode->i_size); +} + +void sd_attrs_to_i_attrs(__u16 sd_attrs, struct inode *inode); +void i_attrs_to_sd_attrs(struct inode *inode, __u16 * sd_attrs); +int reiserfs_setattr(struct dentry *dentry, struct iattr *attr); + +int __reiserfs_write_begin(struct page *page, unsigned from, unsigned len); + +/* namei.c */ +void set_de_name_and_namelen(struct reiserfs_dir_entry *de); +int search_by_entry_key(struct super_block *sb, const struct cpu_key *key, + struct treepath *path, struct reiserfs_dir_entry *de); +struct dentry *reiserfs_get_parent(struct dentry *); + +#ifdef CONFIG_REISERFS_PROC_INFO +int reiserfs_proc_info_init(struct super_block *sb); +int reiserfs_proc_info_done(struct super_block *sb); +int reiserfs_proc_info_global_init(void); +int reiserfs_proc_info_global_done(void); + +#define PROC_EXP( e ) e + +#define __PINFO( sb ) REISERFS_SB(sb) -> s_proc_info_data +#define PROC_INFO_MAX( sb, field, value ) \ + __PINFO( sb ).field = \ + max( REISERFS_SB( sb ) -> s_proc_info_data.field, value ) +#define PROC_INFO_INC( sb, field ) ( ++ ( __PINFO( sb ).field ) ) +#define PROC_INFO_ADD( sb, field, val ) ( __PINFO( sb ).field += ( val ) ) +#define PROC_INFO_BH_STAT( sb, bh, level ) \ + PROC_INFO_INC( sb, sbk_read_at[ ( level ) ] ); \ + PROC_INFO_ADD( sb, free_at[ ( level ) ], B_FREE_SPACE( bh ) ); \ + PROC_INFO_ADD( sb, items_at[ ( level ) ], B_NR_ITEMS( bh ) ) +#else +static inline int reiserfs_proc_info_init(struct super_block *sb) +{ + return 0; +} + +static inline int reiserfs_proc_info_done(struct super_block *sb) +{ + return 0; +} + +static inline int reiserfs_proc_info_global_init(void) +{ + return 0; +} + +static inline int reiserfs_proc_info_global_done(void) +{ + return 0; +} + +#define PROC_EXP( e ) +#define VOID_V ( ( void ) 0 ) +#define PROC_INFO_MAX( sb, field, value ) VOID_V +#define PROC_INFO_INC( sb, field ) VOID_V +#define PROC_INFO_ADD( sb, field, val ) VOID_V +#define PROC_INFO_BH_STAT(sb, bh, n_node_level) VOID_V +#endif + +/* dir.c */ +extern const struct inode_operations reiserfs_dir_inode_operations; +extern const struct inode_operations reiserfs_symlink_inode_operations; +extern const struct inode_operations reiserfs_special_inode_operations; +extern const struct file_operations reiserfs_dir_operations; +int reiserfs_readdir_dentry(struct dentry *, void *, filldir_t, loff_t *); + +/* tail_conversion.c */ +int direct2indirect(struct reiserfs_transaction_handle *, struct inode *, + struct treepath *, struct buffer_head *, loff_t); +int indirect2direct(struct reiserfs_transaction_handle *, struct inode *, + struct page *, struct treepath *, const struct cpu_key *, + loff_t, char *); +void reiserfs_unmap_buffer(struct buffer_head *); + +/* file.c */ +extern const struct inode_operations reiserfs_file_inode_operations; +extern const struct file_operations reiserfs_file_operations; +extern const struct address_space_operations reiserfs_address_space_operations; + +/* fix_nodes.c */ + +int fix_nodes(int n_op_mode, struct tree_balance *tb, + struct item_head *ins_ih, const void *); +void unfix_nodes(struct tree_balance *); + +/* prints.c */ +void __reiserfs_panic(struct super_block *s, const char *id, + const char *function, const char *fmt, ...) + __attribute__ ((noreturn)); +#define reiserfs_panic(s, id, fmt, args...) \ + __reiserfs_panic(s, id, __func__, fmt, ##args) +void __reiserfs_error(struct super_block *s, const char *id, + const char *function, const char *fmt, ...); +#define reiserfs_error(s, id, fmt, args...) \ + __reiserfs_error(s, id, __func__, fmt, ##args) +void reiserfs_info(struct super_block *s, const char *fmt, ...); +void reiserfs_debug(struct super_block *s, int level, const char *fmt, ...); +void print_indirect_item(struct buffer_head *bh, int item_num); +void store_print_tb(struct tree_balance *tb); +void print_cur_tb(char *mes); +void print_de(struct reiserfs_dir_entry *de); +void print_bi(struct buffer_info *bi, char *mes); +#define PRINT_LEAF_ITEMS 1 /* print all items */ +#define PRINT_DIRECTORY_ITEMS 2 /* print directory items */ +#define PRINT_DIRECT_ITEMS 4 /* print contents of direct items */ +void print_block(struct buffer_head *bh, ...); +void print_bmap(struct super_block *s, int silent); +void print_bmap_block(int i, char *data, int size, int silent); +/*void print_super_block (struct super_block * s, char * mes);*/ +void print_objectid_map(struct super_block *s); +void print_block_head(struct buffer_head *bh, char *mes); +void check_leaf(struct buffer_head *bh); +void check_internal(struct buffer_head *bh); +void print_statistics(struct super_block *s); +char *reiserfs_hashname(int code); + +/* lbalance.c */ +int leaf_move_items(int shift_mode, struct tree_balance *tb, int mov_num, + int mov_bytes, struct buffer_head *Snew); +int leaf_shift_left(struct tree_balance *tb, int shift_num, int shift_bytes); +int leaf_shift_right(struct tree_balance *tb, int shift_num, int shift_bytes); +void leaf_delete_items(struct buffer_info *cur_bi, int last_first, int first, + int del_num, int del_bytes); +void leaf_insert_into_buf(struct buffer_info *bi, int before, + struct item_head *inserted_item_ih, + const char *inserted_item_body, int zeros_number); +void leaf_paste_in_buffer(struct buffer_info *bi, int pasted_item_num, + int pos_in_item, int paste_size, const char *body, + int zeros_number); +void leaf_cut_from_buffer(struct buffer_info *bi, int cut_item_num, + int pos_in_item, int cut_size); +void leaf_paste_entries(struct buffer_info *bi, int item_num, int before, + int new_entry_count, struct reiserfs_de_head *new_dehs, + const char *records, int paste_size); +/* ibalance.c */ +int balance_internal(struct tree_balance *, int, int, struct item_head *, + struct buffer_head **); + +/* do_balance.c */ +void do_balance_mark_leaf_dirty(struct tree_balance *tb, + struct buffer_head *bh, int flag); +#define do_balance_mark_internal_dirty do_balance_mark_leaf_dirty +#define do_balance_mark_sb_dirty do_balance_mark_leaf_dirty + +void do_balance(struct tree_balance *tb, struct item_head *ih, + const char *body, int flag); +void reiserfs_invalidate_buffer(struct tree_balance *tb, + struct buffer_head *bh); + +int get_left_neighbor_position(struct tree_balance *tb, int h); +int get_right_neighbor_position(struct tree_balance *tb, int h); +void replace_key(struct tree_balance *tb, struct buffer_head *, int, + struct buffer_head *, int); +void make_empty_node(struct buffer_info *); +struct buffer_head *get_FEB(struct tree_balance *); + +/* bitmap.c */ + +/* structure contains hints for block allocator, and it is a container for + * arguments, such as node, search path, transaction_handle, etc. */ +struct __reiserfs_blocknr_hint { + struct inode *inode; /* inode passed to allocator, if we allocate unf. nodes */ + sector_t block; /* file offset, in blocks */ + struct in_core_key key; + struct treepath *path; /* search path, used by allocator to deternine search_start by + * various ways */ + struct reiserfs_transaction_handle *th; /* transaction handle is needed to log super blocks and + * bitmap blocks changes */ + b_blocknr_t beg, end; + b_blocknr_t search_start; /* a field used to transfer search start value (block number) + * between different block allocator procedures + * (determine_search_start() and others) */ + int prealloc_size; /* is set in determine_prealloc_size() function, used by underlayed + * function that do actual allocation */ + + unsigned formatted_node:1; /* the allocator uses different polices for getting disk space for + * formatted/unformatted blocks with/without preallocation */ + unsigned preallocate:1; +}; + +typedef struct __reiserfs_blocknr_hint reiserfs_blocknr_hint_t; + +int reiserfs_parse_alloc_options(struct super_block *, char *); +void reiserfs_init_alloc_options(struct super_block *s); + +/* + * given a directory, this will tell you what packing locality + * to use for a new object underneat it. The locality is returned + * in disk byte order (le). + */ +__le32 reiserfs_choose_packing(struct inode *dir); + +int reiserfs_init_bitmap_cache(struct super_block *sb); +void reiserfs_free_bitmap_cache(struct super_block *sb); +void reiserfs_cache_bitmap_metadata(struct super_block *sb, struct buffer_head *bh, struct reiserfs_bitmap_info *info); +struct buffer_head *reiserfs_read_bitmap_block(struct super_block *sb, unsigned int bitmap); +int is_reusable(struct super_block *s, b_blocknr_t block, int bit_value); +void reiserfs_free_block(struct reiserfs_transaction_handle *th, struct inode *, + b_blocknr_t, int for_unformatted); +int reiserfs_allocate_blocknrs(reiserfs_blocknr_hint_t *, b_blocknr_t *, int, + int); +static inline int reiserfs_new_form_blocknrs(struct tree_balance *tb, + b_blocknr_t * new_blocknrs, + int amount_needed) +{ + reiserfs_blocknr_hint_t hint = { + .th = tb->transaction_handle, + .path = tb->tb_path, + .inode = NULL, + .key = tb->key, + .block = 0, + .formatted_node = 1 + }; + return reiserfs_allocate_blocknrs(&hint, new_blocknrs, amount_needed, + 0); +} + +static inline int reiserfs_new_unf_blocknrs(struct reiserfs_transaction_handle + *th, struct inode *inode, + b_blocknr_t * new_blocknrs, + struct treepath *path, + sector_t block) +{ + reiserfs_blocknr_hint_t hint = { + .th = th, + .path = path, + .inode = inode, + .block = block, + .formatted_node = 0, + .preallocate = 0 + }; + return reiserfs_allocate_blocknrs(&hint, new_blocknrs, 1, 0); +} + +#ifdef REISERFS_PREALLOCATE +static inline int reiserfs_new_unf_blocknrs2(struct reiserfs_transaction_handle + *th, struct inode *inode, + b_blocknr_t * new_blocknrs, + struct treepath *path, + sector_t block) +{ + reiserfs_blocknr_hint_t hint = { + .th = th, + .path = path, + .inode = inode, + .block = block, + .formatted_node = 0, + .preallocate = 1 + }; + return reiserfs_allocate_blocknrs(&hint, new_blocknrs, 1, 0); +} + +void reiserfs_discard_prealloc(struct reiserfs_transaction_handle *th, + struct inode *inode); +void reiserfs_discard_all_prealloc(struct reiserfs_transaction_handle *th); +#endif + +/* hashes.c */ +__u32 keyed_hash(const signed char *msg, int len); +__u32 yura_hash(const signed char *msg, int len); +__u32 r5_hash(const signed char *msg, int len); + +#define reiserfs_set_le_bit __set_bit_le +#define reiserfs_test_and_set_le_bit __test_and_set_bit_le +#define reiserfs_clear_le_bit __clear_bit_le +#define reiserfs_test_and_clear_le_bit __test_and_clear_bit_le +#define reiserfs_test_le_bit test_bit_le +#define reiserfs_find_next_zero_le_bit find_next_zero_bit_le + +/* sometimes reiserfs_truncate may require to allocate few new blocks + to perform indirect2direct conversion. People probably used to + think, that truncate should work without problems on a filesystem + without free disk space. They may complain that they can not + truncate due to lack of free disk space. This spare space allows us + to not worry about it. 500 is probably too much, but it should be + absolutely safe */ +#define SPARE_SPACE 500 + +/* prototypes from ioctl.c */ +long reiserfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg); +long reiserfs_compat_ioctl(struct file *filp, + unsigned int cmd, unsigned long arg); +int reiserfs_unpack(struct inode *inode, struct file *filp); diff --git a/fs/reiserfs/resize.c b/fs/reiserfs/resize.c index e1415ad9325..9a17f63c3fd 100644 --- a/fs/reiserfs/resize.c +++ b/fs/reiserfs/resize.c @@ -13,7 +13,7 @@ #include <linux/vmalloc.h> #include <linux/string.h> #include <linux/errno.h> -#include <linux/reiserfs_fs.h> +#include "reiserfs.h" #include <linux/buffer_head.h> int reiserfs_resize(struct super_block *s, unsigned long block_count_new) diff --git a/fs/reiserfs/stree.c b/fs/reiserfs/stree.c index 313d39d639e..f1b68afc268 100644 --- a/fs/reiserfs/stree.c +++ b/fs/reiserfs/stree.c @@ -51,7 +51,7 @@ #include <linux/time.h> #include <linux/string.h> #include <linux/pagemap.h> -#include <linux/reiserfs_fs.h> +#include "reiserfs.h" #include <linux/buffer_head.h> #include <linux/quotaops.h> diff --git a/fs/reiserfs/super.c b/fs/reiserfs/super.c index cf68a6ba0ec..8b7616ef06d 100644 --- a/fs/reiserfs/super.c +++ b/fs/reiserfs/super.c @@ -16,7 +16,7 @@ #include <linux/vmalloc.h> #include <linux/time.h> #include <asm/uaccess.h> -#include <linux/reiserfs_fs.h> +#include "reiserfs.h" #include "acl.h" #include "xattr.h" #include <linux/init.h> diff --git a/fs/reiserfs/tail_conversion.c b/fs/reiserfs/tail_conversion.c index d7f6e51bef2..32f9a80d292 100644 --- a/fs/reiserfs/tail_conversion.c +++ b/fs/reiserfs/tail_conversion.c @@ -5,7 +5,7 @@ #include <linux/time.h> #include <linux/pagemap.h> #include <linux/buffer_head.h> -#include <linux/reiserfs_fs.h> +#include "reiserfs.h" /* access to tail : when one is going to read tail it must make sure, that is not running. direct2indirect and indirect2direct can not run concurrently */ diff --git a/fs/reiserfs/xattr.c b/fs/reiserfs/xattr.c index 61c9b5633e2..46fc1c20a6b 100644 --- a/fs/reiserfs/xattr.c +++ b/fs/reiserfs/xattr.c @@ -33,7 +33,7 @@ * The xattrs themselves are protected by the xattr_sem. */ -#include <linux/reiserfs_fs.h> +#include "reiserfs.h" #include <linux/capability.h> #include <linux/dcache.h> #include <linux/namei.h> diff --git a/fs/reiserfs/xattr.h b/fs/reiserfs/xattr.h index ccd146bb066..f59626c5d33 100644 --- a/fs/reiserfs/xattr.h +++ b/fs/reiserfs/xattr.h @@ -2,7 +2,6 @@ #include <linux/init.h> #include <linux/list.h> #include <linux/rwsem.h> -#include <linux/reiserfs_fs.h> struct inode; struct dentry; diff --git a/fs/reiserfs/xattr_acl.c b/fs/reiserfs/xattr_acl.c index f09094057ea..44474f9b990 100644 --- a/fs/reiserfs/xattr_acl.c +++ b/fs/reiserfs/xattr_acl.c @@ -1,7 +1,7 @@ #include <linux/capability.h> #include <linux/fs.h> #include <linux/posix_acl.h> -#include <linux/reiserfs_fs.h> +#include "reiserfs.h" #include <linux/errno.h> #include <linux/pagemap.h> #include <linux/xattr.h> diff --git a/fs/reiserfs/xattr_security.c b/fs/reiserfs/xattr_security.c index 6104066e44c..800a3cef6f6 100644 --- a/fs/reiserfs/xattr_security.c +++ b/fs/reiserfs/xattr_security.c @@ -1,4 +1,4 @@ -#include <linux/reiserfs_fs.h> +#include "reiserfs.h" #include <linux/errno.h> #include <linux/fs.h> #include <linux/pagemap.h> diff --git a/fs/reiserfs/xattr_trusted.c b/fs/reiserfs/xattr_trusted.c index f995b258c14..a0035719f66 100644 --- a/fs/reiserfs/xattr_trusted.c +++ b/fs/reiserfs/xattr_trusted.c @@ -1,4 +1,4 @@ -#include <linux/reiserfs_fs.h> +#include "reiserfs.h" #include <linux/capability.h> #include <linux/errno.h> #include <linux/fs.h> diff --git a/fs/reiserfs/xattr_user.c b/fs/reiserfs/xattr_user.c index 748978db6f0..8667491ae7c 100644 --- a/fs/reiserfs/xattr_user.c +++ b/fs/reiserfs/xattr_user.c @@ -1,4 +1,4 @@ -#include <linux/reiserfs_fs.h> +#include "reiserfs.h" #include <linux/errno.h> #include <linux/fs.h> #include <linux/pagemap.h> diff --git a/include/linux/reiserfs_fs.h b/include/linux/reiserfs_fs.h index 2213ddcce20..ea3700cd736 100644 --- a/include/linux/reiserfs_fs.h +++ b/include/linux/reiserfs_fs.h @@ -1,32 +1,12 @@ /* * Copyright 1996, 1997, 1998 Hans Reiser, see reiserfs/README for licensing and copyright details */ - - /* this file has an amazingly stupid - name, yura please fix it to be - reiserfs.h, and merge all the rest - of our .h files that are in this - directory into it. */ - #ifndef _LINUX_REISER_FS_H #define _LINUX_REISER_FS_H #include <linux/types.h> #include <linux/magic.h> -#ifdef __KERNEL__ -#include <linux/slab.h> -#include <linux/interrupt.h> -#include <linux/sched.h> -#include <linux/workqueue.h> -#include <asm/unaligned.h> -#include <linux/bitops.h> -#include <linux/proc_fs.h> -#include <linux/buffer_head.h> -#include <linux/reiserfs_fs_i.h> -#include <linux/reiserfs_fs_sb.h> -#endif - /* * include/linux/reiser_fs.h * @@ -43,2318 +23,4 @@ #define REISERFS_IOC_GETVERSION FS_IOC_GETVERSION #define REISERFS_IOC_SETVERSION FS_IOC_SETVERSION -#ifdef __KERNEL__ -/* the 32 bit compat definitions with int argument */ -#define REISERFS_IOC32_UNPACK _IOW(0xCD, 1, int) -#define REISERFS_IOC32_GETFLAGS FS_IOC32_GETFLAGS -#define REISERFS_IOC32_SETFLAGS FS_IOC32_SETFLAGS -#define REISERFS_IOC32_GETVERSION FS_IOC32_GETVERSION -#define REISERFS_IOC32_SETVERSION FS_IOC32_SETVERSION - -/* - * Locking primitives. The write lock is a per superblock - * special mutex that has properties close to the Big Kernel Lock - * which was used in the previous locking scheme. - */ -void reiserfs_write_lock(struct super_block *s); -void reiserfs_write_unlock(struct super_block *s); -int reiserfs_write_lock_once(struct super_block *s); -void reiserfs_write_unlock_once(struct super_block *s, int lock_depth); - -#ifdef CONFIG_REISERFS_CHECK -void reiserfs_lock_check_recursive(struct super_block *s); -#else -static inline void reiserfs_lock_check_recursive(struct super_block *s) { } -#endif - -/* - * Several mutexes depend on the write lock. - * However sometimes we want to relax the write lock while we hold - * these mutexes, according to the release/reacquire on schedule() - * properties of the Bkl that were used. - * Reiserfs performances and locking were based on this scheme. - * Now that the write lock is a mutex and not the bkl anymore, doing so - * may result in a deadlock: - * - * A acquire write_lock - * A acquire j_commit_mutex - * A release write_lock and wait for something - * B acquire write_lock - * B can't acquire j_commit_mutex and sleep - * A can't acquire write lock anymore - * deadlock - * - * What we do here is avoiding such deadlock by playing the same game - * than the Bkl: if we can't acquire a mutex that depends on the write lock, - * we release the write lock, wait a bit and then retry. - * - * The mutexes concerned by this hack are: - * - The commit mutex of a journal list - * - The flush mutex - * - The journal lock - * - The inode mutex - */ -static inline void reiserfs_mutex_lock_safe(struct mutex *m, - struct super_block *s) -{ - reiserfs_lock_check_recursive(s); - reiserfs_write_unlock(s); - mutex_lock(m); - reiserfs_write_lock(s); -} - -static inline void -reiserfs_mutex_lock_nested_safe(struct mutex *m, unsigned int subclass, - struct super_block *s) -{ - reiserfs_lock_check_recursive(s); - reiserfs_write_unlock(s); - mutex_lock_nested(m, subclass); - reiserfs_write_lock(s); -} - -static inline void -reiserfs_down_read_safe(struct rw_semaphore *sem, struct super_block *s) -{ - reiserfs_lock_check_recursive(s); - reiserfs_write_unlock(s); - down_read(sem); - reiserfs_write_lock(s); -} - -/* - * When we schedule, we usually want to also release the write lock, - * according to the previous bkl based locking scheme of reiserfs. - */ -static inline void reiserfs_cond_resched(struct super_block *s) -{ - if (need_resched()) { - reiserfs_write_unlock(s); - schedule(); - reiserfs_write_lock(s); - } -} - -struct fid; - -/* in reading the #defines, it may help to understand that they employ - the following abbreviations: - - B = Buffer - I = Item header - H = Height within the tree (should be changed to LEV) - N = Number of the item in the node - STAT = stat data - DEH = Directory Entry Header - EC = Entry Count - E = Entry number - UL = Unsigned Long - BLKH = BLocK Header - UNFM = UNForMatted node - DC = Disk Child - P = Path - - These #defines are named by concatenating these abbreviations, - where first comes the arguments, and last comes the return value, - of the macro. - -*/ - -#define USE_INODE_GENERATION_COUNTER - -#define REISERFS_PREALLOCATE -#define DISPLACE_NEW_PACKING_LOCALITIES -#define PREALLOCATION_SIZE 9 - -/* n must be power of 2 */ -#define _ROUND_UP(x,n) (((x)+(n)-1u) & ~((n)-1u)) - -// to be ok for alpha and others we have to align structures to 8 byte -// boundary. -// FIXME: do not change 4 by anything else: there is code which relies on that -#define ROUND_UP(x) _ROUND_UP(x,8LL) - -/* debug levels. Right now, CONFIG_REISERFS_CHECK means print all debug -** messages. -*/ -#define REISERFS_DEBUG_CODE 5 /* extra messages to help find/debug errors */ - -void __reiserfs_warning(struct super_block *s, const char *id, - const char *func, const char *fmt, ...); -#define reiserfs_warning(s, id, fmt, args...) \ - __reiserfs_warning(s, id, __func__, fmt, ##args) -/* assertions handling */ - -/** always check a condition and panic if it's false. */ -#define __RASSERT(cond, scond, format, args...) \ -do { \ - if (!(cond)) \ - reiserfs_panic(NULL, "assertion failure", "(" #cond ") at " \ - __FILE__ ":%i:%s: " format "\n", \ - in_interrupt() ? -1 : task_pid_nr(current), \ - __LINE__, __func__ , ##args); \ -} while (0) - -#define RASSERT(cond, format, args...) __RASSERT(cond, #cond, format, ##args) - -#if defined( CONFIG_REISERFS_CHECK ) -#define RFALSE(cond, format, args...) __RASSERT(!(cond), "!(" #cond ")", format, ##args) -#else -#define RFALSE( cond, format, args... ) do {;} while( 0 ) -#endif - -#define CONSTF __attribute_const__ -/* - * Disk Data Structures - */ - -/***************************************************************************/ -/* SUPER BLOCK */ -/***************************************************************************/ - -/* - * Structure of super block on disk, a version of which in RAM is often accessed as REISERFS_SB(s)->s_rs - * the version in RAM is part of a larger structure containing fields never written to disk. - */ -#define UNSET_HASH 0 // read_super will guess about, what hash names - // in directories were sorted with -#define TEA_HASH 1 -#define YURA_HASH 2 -#define R5_HASH 3 -#define DEFAULT_HASH R5_HASH - -struct journal_params { - __le32 jp_journal_1st_block; /* where does journal start from on its - * device */ - __le32 jp_journal_dev; /* journal device st_rdev */ - __le32 jp_journal_size; /* size of the journal */ - __le32 jp_journal_trans_max; /* max number of blocks in a transaction. */ - __le32 jp_journal_magic; /* random value made on fs creation (this - * was sb_journal_block_count) */ - __le32 jp_journal_max_batch; /* max number of blocks to batch into a - * trans */ - __le32 jp_journal_max_commit_age; /* in seconds, how old can an async - * commit be */ - __le32 jp_journal_max_trans_age; /* in seconds, how old can a transaction - * be */ -}; - -/* this is the super from 3.5.X, where X >= 10 */ -struct reiserfs_super_block_v1 { - __le32 s_block_count; /* blocks count */ - __le32 s_free_blocks; /* free blocks count */ - __le32 s_root_block; /* root block number */ - struct journal_params s_journal; - __le16 s_blocksize; /* block size */ - __le16 s_oid_maxsize; /* max size of object id array, see - * get_objectid() commentary */ - __le16 s_oid_cursize; /* current size of object id array */ - __le16 s_umount_state; /* this is set to 1 when filesystem was - * umounted, to 2 - when not */ - char s_magic[10]; /* reiserfs magic string indicates that - * file system is reiserfs: - * "ReIsErFs" or "ReIsEr2Fs" or "ReIsEr3Fs" */ - __le16 s_fs_state; /* it is set to used by fsck to mark which - * phase of rebuilding is done */ - __le32 s_hash_function_code; /* indicate, what hash function is being use - * to sort names in a directory*/ - __le16 s_tree_height; /* height of disk tree */ - __le16 s_bmap_nr; /* amount of bitmap blocks needed to address - * each block of file system */ - __le16 s_version; /* this field is only reliable on filesystem - * with non-standard journal */ - __le16 s_reserved_for_journal; /* size in blocks of journal area on main - * device, we need to keep after - * making fs with non-standard journal */ -} __attribute__ ((__packed__)); - -#define SB_SIZE_V1 (sizeof(struct reiserfs_super_block_v1)) - -/* this is the on disk super block */ -struct reiserfs_super_block { - struct reiserfs_super_block_v1 s_v1; - __le32 s_inode_generation; - __le32 s_flags; /* Right now used only by inode-attributes, if enabled */ - unsigned char s_uuid[16]; /* filesystem unique identifier */ - unsigned char s_label[16]; /* filesystem volume label */ - __le16 s_mnt_count; /* Count of mounts since last fsck */ - __le16 s_max_mnt_count; /* Maximum mounts before check */ - __le32 s_lastcheck; /* Timestamp of last fsck */ - __le32 s_check_interval; /* Interval between checks */ - char s_unused[76]; /* zero filled by mkreiserfs and - * reiserfs_convert_objectid_map_v1() - * so any additions must be updated - * there as well. */ -} __attribute__ ((__packed__)); - -#define SB_SIZE (sizeof(struct reiserfs_super_block)) - -#define REISERFS_VERSION_1 0 -#define REISERFS_VERSION_2 2 - -// on-disk super block fields converted to cpu form -#define SB_DISK_SUPER_BLOCK(s) (REISERFS_SB(s)->s_rs) -#define SB_V1_DISK_SUPER_BLOCK(s) (&(SB_DISK_SUPER_BLOCK(s)->s_v1)) -#define SB_BLOCKSIZE(s) \ - le32_to_cpu ((SB_V1_DISK_SUPER_BLOCK(s)->s_blocksize)) -#define SB_BLOCK_COUNT(s) \ - le32_to_cpu ((SB_V1_DISK_SUPER_BLOCK(s)->s_block_count)) -#define SB_FREE_BLOCKS(s) \ - le32_to_cpu ((SB_V1_DISK_SUPER_BLOCK(s)->s_free_blocks)) -#define SB_REISERFS_MAGIC(s) \ - (SB_V1_DISK_SUPER_BLOCK(s)->s_magic) -#define SB_ROOT_BLOCK(s) \ - le32_to_cpu ((SB_V1_DISK_SUPER_BLOCK(s)->s_root_block)) -#define SB_TREE_HEIGHT(s) \ - le16_to_cpu ((SB_V1_DISK_SUPER_BLOCK(s)->s_tree_height)) -#define SB_REISERFS_STATE(s) \ - le16_to_cpu ((SB_V1_DISK_SUPER_BLOCK(s)->s_umount_state)) -#define SB_VERSION(s) le16_to_cpu ((SB_V1_DISK_SUPER_BLOCK(s)->s_version)) -#define SB_BMAP_NR(s) le16_to_cpu ((SB_V1_DISK_SUPER_BLOCK(s)->s_bmap_nr)) - -#define PUT_SB_BLOCK_COUNT(s, val) \ - do { SB_V1_DISK_SUPER_BLOCK(s)->s_block_count = cpu_to_le32(val); } while (0) -#define PUT_SB_FREE_BLOCKS(s, val) \ - do { SB_V1_DISK_SUPER_BLOCK(s)->s_free_blocks = cpu_to_le32(val); } while (0) -#define PUT_SB_ROOT_BLOCK(s, val) \ - do { SB_V1_DISK_SUPER_BLOCK(s)->s_root_block = cpu_to_le32(val); } while (0) -#define PUT_SB_TREE_HEIGHT(s, val) \ - do { SB_V1_DISK_SUPER_BLOCK(s)->s_tree_height = cpu_to_le16(val); } while (0) -#define PUT_SB_REISERFS_STATE(s, val) \ - do { SB_V1_DISK_SUPER_BLOCK(s)->s_umount_state = cpu_to_le16(val); } while (0) -#define PUT_SB_VERSION(s, val) \ - do { SB_V1_DISK_SUPER_BLOCK(s)->s_version = cpu_to_le16(val); } while (0) -#define PUT_SB_BMAP_NR(s, val) \ - do { SB_V1_DISK_SUPER_BLOCK(s)->s_bmap_nr = cpu_to_le16 (val); } while (0) - -#define SB_ONDISK_JP(s) (&SB_V1_DISK_SUPER_BLOCK(s)->s_journal) -#define SB_ONDISK_JOURNAL_SIZE(s) \ - le32_to_cpu ((SB_ONDISK_JP(s)->jp_journal_size)) -#define SB_ONDISK_JOURNAL_1st_BLOCK(s) \ - le32_to_cpu ((SB_ONDISK_JP(s)->jp_journal_1st_block)) -#define SB_ONDISK_JOURNAL_DEVICE(s) \ - le32_to_cpu ((SB_ONDISK_JP(s)->jp_journal_dev)) -#define SB_ONDISK_RESERVED_FOR_JOURNAL(s) \ - le16_to_cpu ((SB_V1_DISK_SUPER_BLOCK(s)->s_reserved_for_journal)) - -#define is_block_in_log_or_reserved_area(s, block) \ - block >= SB_JOURNAL_1st_RESERVED_BLOCK(s) \ - && block < SB_JOURNAL_1st_RESERVED_BLOCK(s) + \ - ((!is_reiserfs_jr(SB_DISK_SUPER_BLOCK(s)) ? \ - SB_ONDISK_JOURNAL_SIZE(s) + 1 : SB_ONDISK_RESERVED_FOR_JOURNAL(s))) - -int is_reiserfs_3_5(struct reiserfs_super_block *rs); -int is_reiserfs_3_6(struct reiserfs_super_block *rs); -int is_reiserfs_jr(struct reiserfs_super_block *rs); - -/* ReiserFS leaves the first 64k unused, so that partition labels have - enough space. If someone wants to write a fancy bootloader that - needs more than 64k, let us know, and this will be increased in size. - This number must be larger than than the largest block size on any - platform, or code will break. -Hans */ -#define REISERFS_DISK_OFFSET_IN_BYTES (64 * 1024) -#define REISERFS_FIRST_BLOCK unused_define -#define REISERFS_JOURNAL_OFFSET_IN_BYTES REISERFS_DISK_OFFSET_IN_BYTES - -/* the spot for the super in versions 3.5 - 3.5.10 (inclusive) */ -#define REISERFS_OLD_DISK_OFFSET_IN_BYTES (8 * 1024) - -/* reiserfs internal error code (used by search_by_key and fix_nodes)) */ -#define CARRY_ON 0 -#define REPEAT_SEARCH -1 -#define IO_ERROR -2 -#define NO_DISK_SPACE -3 -#define NO_BALANCING_NEEDED (-4) -#define NO_MORE_UNUSED_CONTIGUOUS_BLOCKS (-5) -#define QUOTA_EXCEEDED -6 - -typedef __u32 b_blocknr_t; -typedef __le32 unp_t; - -struct unfm_nodeinfo { - unp_t unfm_nodenum; - unsigned short unfm_freespace; -}; - -/* there are two formats of keys: 3.5 and 3.6 - */ -#define KEY_FORMAT_3_5 0 -#define KEY_FORMAT_3_6 1 - -/* there are two stat datas */ -#define STAT_DATA_V1 0 -#define STAT_DATA_V2 1 - -static inline struct reiserfs_inode_info *REISERFS_I(const struct inode *inode) -{ - return container_of(inode, struct reiserfs_inode_info, vfs_inode); -} - -static inline struct reiserfs_sb_info *REISERFS_SB(const struct super_block *sb) -{ - return sb->s_fs_info; -} - -/* Don't trust REISERFS_SB(sb)->s_bmap_nr, it's a u16 - * which overflows on large file systems. */ -static inline __u32 reiserfs_bmap_count(struct super_block *sb) -{ - return (SB_BLOCK_COUNT(sb) - 1) / (sb->s_blocksize * 8) + 1; -} - -static inline int bmap_would_wrap(unsigned bmap_nr) -{ - return bmap_nr > ((1LL << 16) - 1); -} - -/** this says about version of key of all items (but stat data) the - object consists of */ -#define get_inode_item_key_version( inode ) \ - ((REISERFS_I(inode)->i_flags & i_item_key_version_mask) ? KEY_FORMAT_3_6 : KEY_FORMAT_3_5) - -#define set_inode_item_key_version( inode, version ) \ - ({ if((version)==KEY_FORMAT_3_6) \ - REISERFS_I(inode)->i_flags |= i_item_key_version_mask; \ - else \ - REISERFS_I(inode)->i_flags &= ~i_item_key_version_mask; }) - -#define get_inode_sd_version(inode) \ - ((REISERFS_I(inode)->i_flags & i_stat_data_version_mask) ? STAT_DATA_V2 : STAT_DATA_V1) - -#define set_inode_sd_version(inode, version) \ - ({ if((version)==STAT_DATA_V2) \ - REISERFS_I(inode)->i_flags |= i_stat_data_version_mask; \ - else \ - REISERFS_I(inode)->i_flags &= ~i_stat_data_version_mask; }) - -/* This is an aggressive tail suppression policy, I am hoping it - improves our benchmarks. The principle behind it is that percentage - space saving is what matters, not absolute space saving. This is - non-intuitive, but it helps to understand it if you consider that the - cost to access 4 blocks is not much more than the cost to access 1 - block, if you have to do a seek and rotate. A tail risks a - non-linear disk access that is significant as a percentage of total - time cost for a 4 block file and saves an amount of space that is - less significant as a percentage of space, or so goes the hypothesis. - -Hans */ -#define STORE_TAIL_IN_UNFM_S1(n_file_size,n_tail_size,n_block_size) \ -(\ - (!(n_tail_size)) || \ - (((n_tail_size) > MAX_DIRECT_ITEM_LEN(n_block_size)) || \ - ( (n_file_size) >= (n_block_size) * 4 ) || \ - ( ( (n_file_size) >= (n_block_size) * 3 ) && \ - ( (n_tail_size) >= (MAX_DIRECT_ITEM_LEN(n_block_size))/4) ) || \ - ( ( (n_file_size) >= (n_block_size) * 2 ) && \ - ( (n_tail_size) >= (MAX_DIRECT_ITEM_LEN(n_block_size))/2) ) || \ - ( ( (n_file_size) >= (n_block_size) ) && \ - ( (n_tail_size) >= (MAX_DIRECT_ITEM_LEN(n_block_size) * 3)/4) ) ) \ -) - -/* Another strategy for tails, this one means only create a tail if all the - file would fit into one DIRECT item. - Primary intention for this one is to increase performance by decreasing - seeking. -*/ -#define STORE_TAIL_IN_UNFM_S2(n_file_size,n_tail_size,n_block_size) \ -(\ - (!(n_tail_size)) || \ - (((n_file_size) > MAX_DIRECT_ITEM_LEN(n_block_size)) ) \ -) - -/* - * values for s_umount_state field - */ -#define REISERFS_VALID_FS 1 -#define REISERFS_ERROR_FS 2 - -// -// there are 5 item types currently -// -#define TYPE_STAT_DATA 0 -#define TYPE_INDIRECT 1 -#define TYPE_DIRECT 2 -#define TYPE_DIRENTRY 3 -#define TYPE_MAXTYPE 3 -#define TYPE_ANY 15 // FIXME: comment is required - -/***************************************************************************/ -/* KEY & ITEM HEAD */ -/***************************************************************************/ - -// -// directories use this key as well as old files -// -struct offset_v1 { - __le32 k_offset; - __le32 k_uniqueness; -} __attribute__ ((__packed__)); - -struct offset_v2 { - __le64 v; -} __attribute__ ((__packed__)); - -static inline __u16 offset_v2_k_type(const struct offset_v2 *v2) -{ - __u8 type = le64_to_cpu(v2->v) >> 60; - return (type <= TYPE_MAXTYPE) ? type : TYPE_ANY; -} - -static inline void set_offset_v2_k_type(struct offset_v2 *v2, int type) -{ - v2->v = - (v2->v & cpu_to_le64(~0ULL >> 4)) | cpu_to_le64((__u64) type << 60); -} - -static inline loff_t offset_v2_k_offset(const struct offset_v2 *v2) -{ - return le64_to_cpu(v2->v) & (~0ULL >> 4); -} - -static inline void set_offset_v2_k_offset(struct offset_v2 *v2, loff_t offset) -{ - offset &= (~0ULL >> 4); - v2->v = (v2->v & cpu_to_le64(15ULL << 60)) | cpu_to_le64(offset); -} - -/* Key of an item determines its location in the S+tree, and - is composed of 4 components */ -struct reiserfs_key { - __le32 k_dir_id; /* packing locality: by default parent - directory object id */ - __le32 k_objectid; /* object identifier */ - union { - struct offset_v1 k_offset_v1; - struct offset_v2 k_offset_v2; - } __attribute__ ((__packed__)) u; -} __attribute__ ((__packed__)); - -struct in_core_key { - __u32 k_dir_id; /* packing locality: by default parent - directory object id */ - __u32 k_objectid; /* object identifier */ - __u64 k_offset; - __u8 k_type; -}; - -struct cpu_key { - struct in_core_key on_disk_key; - int version; - int key_length; /* 3 in all cases but direct2indirect and - indirect2direct conversion */ -}; - -/* Our function for comparing keys can compare keys of different - lengths. It takes as a parameter the length of the keys it is to - compare. These defines are used in determining what is to be passed - to it as that parameter. */ -#define REISERFS_FULL_KEY_LEN 4 -#define REISERFS_SHORT_KEY_LEN 2 - -/* The result of the key compare */ -#define FIRST_GREATER 1 -#define SECOND_GREATER -1 -#define KEYS_IDENTICAL 0 -#define KEY_FOUND 1 -#define KEY_NOT_FOUND 0 - -#define KEY_SIZE (sizeof(struct reiserfs_key)) -#define SHORT_KEY_SIZE (sizeof (__u32) + sizeof (__u32)) - -/* return values for search_by_key and clones */ -#define ITEM_FOUND 1 -#define ITEM_NOT_FOUND 0 -#define ENTRY_FOUND 1 -#define ENTRY_NOT_FOUND 0 -#define DIRECTORY_NOT_FOUND -1 -#define REGULAR_FILE_FOUND -2 -#define DIRECTORY_FOUND -3 -#define BYTE_FOUND 1 -#define BYTE_NOT_FOUND 0 -#define FILE_NOT_FOUND -1 - -#define POSITION_FOUND 1 -#define POSITION_NOT_FOUND 0 - -// return values for reiserfs_find_entry and search_by_entry_key -#define NAME_FOUND 1 -#define NAME_NOT_FOUND 0 -#define GOTO_PREVIOUS_ITEM 2 -#define NAME_FOUND_INVISIBLE 3 - -/* Everything in the filesystem is stored as a set of items. The - item head contains the key of the item, its free space (for - indirect items) and specifies the location of the item itself - within the block. */ - -struct item_head { - /* Everything in the tree is found by searching for it based on - * its key.*/ - struct reiserfs_key ih_key; - union { - /* The free space in the last unformatted node of an - indirect item if this is an indirect item. This - equals 0xFFFF iff this is a direct item or stat data - item. Note that the key, not this field, is used to - determine the item type, and thus which field this - union contains. */ - __le16 ih_free_space_reserved; - /* Iff this is a directory item, this field equals the - number of directory entries in the directory item. */ - __le16 ih_entry_count; - } __attribute__ ((__packed__)) u; - __le16 ih_item_len; /* total size of the item body */ - __le16 ih_item_location; /* an offset to the item body - * within the block */ - __le16 ih_version; /* 0 for all old items, 2 for new - ones. Highest bit is set by fsck - temporary, cleaned after all - done */ -} __attribute__ ((__packed__)); -/* size of item header */ -#define IH_SIZE (sizeof(struct item_head)) - -#define ih_free_space(ih) le16_to_cpu((ih)->u.ih_free_space_reserved) -#define ih_version(ih) le16_to_cpu((ih)->ih_version) -#define ih_entry_count(ih) le16_to_cpu((ih)->u.ih_entry_count) -#define ih_location(ih) le16_to_cpu((ih)->ih_item_location) -#define ih_item_len(ih) le16_to_cpu((ih)->ih_item_len) - -#define put_ih_free_space(ih, val) do { (ih)->u.ih_free_space_reserved = cpu_to_le16(val); } while(0) -#define put_ih_version(ih, val) do { (ih)->ih_version = cpu_to_le16(val); } while (0) -#define put_ih_entry_count(ih, val) do { (ih)->u.ih_entry_count = cpu_to_le16(val); } while (0) -#define put_ih_location(ih, val) do { (ih)->ih_item_location = cpu_to_le16(val); } while (0) -#define put_ih_item_len(ih, val) do { (ih)->ih_item_len = cpu_to_le16(val); } while (0) - -#define unreachable_item(ih) (ih_version(ih) & (1 << 15)) - -#define get_ih_free_space(ih) (ih_version (ih) == KEY_FORMAT_3_6 ? 0 : ih_free_space (ih)) -#define set_ih_free_space(ih,val) put_ih_free_space((ih), ((ih_version(ih) == KEY_FORMAT_3_6) ? 0 : (val))) - -/* these operate on indirect items, where you've got an array of ints -** at a possibly unaligned location. These are a noop on ia32 -** -** p is the array of __u32, i is the index into the array, v is the value -** to store there. -*/ -#define get_block_num(p, i) get_unaligned_le32((p) + (i)) -#define put_block_num(p, i, v) put_unaligned_le32((v), (p) + (i)) - -// -// in old version uniqueness field shows key type -// -#define V1_SD_UNIQUENESS 0 -#define V1_INDIRECT_UNIQUENESS 0xfffffffe -#define V1_DIRECT_UNIQUENESS 0xffffffff -#define V1_DIRENTRY_UNIQUENESS 500 -#define V1_ANY_UNIQUENESS 555 // FIXME: comment is required - -// -// here are conversion routines -// -static inline int uniqueness2type(__u32 uniqueness) CONSTF; -static inline int uniqueness2type(__u32 uniqueness) -{ - switch ((int)uniqueness) { - case V1_SD_UNIQUENESS: - return TYPE_STAT_DATA; - case V1_INDIRECT_UNIQUENESS: - return TYPE_INDIRECT; - case V1_DIRECT_UNIQUENESS: - return TYPE_DIRECT; - case V1_DIRENTRY_UNIQUENESS: - return TYPE_DIRENTRY; - case V1_ANY_UNIQUENESS: - default: - return TYPE_ANY; - } -} - -static inline __u32 type2uniqueness(int type) CONSTF; -static inline __u32 type2uniqueness(int type) -{ - switch (type) { - case TYPE_STAT_DATA: - return V1_SD_UNIQUENESS; - case TYPE_INDIRECT: - return V1_INDIRECT_UNIQUENESS; - case TYPE_DIRECT: - return V1_DIRECT_UNIQUENESS; - case TYPE_DIRENTRY: - return V1_DIRENTRY_UNIQUENESS; - case TYPE_ANY: - default: - return V1_ANY_UNIQUENESS; - } -} - -// -// key is pointer to on disk key which is stored in le, result is cpu, -// there is no way to get version of object from key, so, provide -// version to these defines -// -static inline loff_t le_key_k_offset(int version, - const struct reiserfs_key *key) -{ - return (version == KEY_FORMAT_3_5) ? - le32_to_cpu(key->u.k_offset_v1.k_offset) : - offset_v2_k_offset(&(key->u.k_offset_v2)); -} - -static inline loff_t le_ih_k_offset(const struct item_head *ih) -{ - return le_key_k_offset(ih_version(ih), &(ih->ih_key)); -} - -static inline loff_t le_key_k_type(int version, const struct reiserfs_key *key) -{ - return (version == KEY_FORMAT_3_5) ? - uniqueness2type(le32_to_cpu(key->u.k_offset_v1.k_uniqueness)) : - offset_v2_k_type(&(key->u.k_offset_v2)); -} - -static inline loff_t le_ih_k_type(const struct item_head *ih) -{ - return le_key_k_type(ih_version(ih), &(ih->ih_key)); -} - -static inline void set_le_key_k_offset(int version, struct reiserfs_key *key, - loff_t offset) -{ - (version == KEY_FORMAT_3_5) ? (void)(key->u.k_offset_v1.k_offset = cpu_to_le32(offset)) : /* jdm check */ - (void)(set_offset_v2_k_offset(&(key->u.k_offset_v2), offset)); -} - -static inline void set_le_ih_k_offset(struct item_head *ih, loff_t offset) -{ - set_le_key_k_offset(ih_version(ih), &(ih->ih_key), offset); -} - -static inline void set_le_key_k_type(int version, struct reiserfs_key *key, - int type) -{ - (version == KEY_FORMAT_3_5) ? - (void)(key->u.k_offset_v1.k_uniqueness = - cpu_to_le32(type2uniqueness(type))) - : (void)(set_offset_v2_k_type(&(key->u.k_offset_v2), type)); -} - -static inline void set_le_ih_k_type(struct item_head *ih, int type) -{ - set_le_key_k_type(ih_version(ih), &(ih->ih_key), type); -} - -static inline int is_direntry_le_key(int version, struct reiserfs_key *key) -{ - return le_key_k_type(version, key) == TYPE_DIRENTRY; -} - -static inline int is_direct_le_key(int version, struct reiserfs_key *key) -{ - return le_key_k_type(version, key) == TYPE_DIRECT; -} - -static inline int is_indirect_le_key(int version, struct reiserfs_key *key) -{ - return le_key_k_type(version, key) == TYPE_INDIRECT; -} - -static inline int is_statdata_le_key(int version, struct reiserfs_key *key) -{ - return le_key_k_type(version, key) == TYPE_STAT_DATA; -} - -// -// item header has version. -// -static inline int is_direntry_le_ih(struct item_head *ih) -{ - return is_direntry_le_key(ih_version(ih), &ih->ih_key); -} - -static inline int is_direct_le_ih(struct item_head *ih) -{ - return is_direct_le_key(ih_version(ih), &ih->ih_key); -} - -static inline int is_indirect_le_ih(struct item_head *ih) -{ - return is_indirect_le_key(ih_version(ih), &ih->ih_key); -} - -static inline int is_statdata_le_ih(struct item_head *ih) -{ - return is_statdata_le_key(ih_version(ih), &ih->ih_key); -} - -// -// key is pointer to cpu key, result is cpu -// -static inline loff_t cpu_key_k_offset(const struct cpu_key *key) -{ - return key->on_disk_key.k_offset; -} - -static inline loff_t cpu_key_k_type(const struct cpu_key *key) -{ - return key->on_disk_key.k_type; -} - -static inline void set_cpu_key_k_offset(struct cpu_key *key, loff_t offset) -{ - key->on_disk_key.k_offset = offset; -} - -static inline void set_cpu_key_k_type(struct cpu_key *key, int type) -{ - key->on_disk_key.k_type = type; -} - -static inline void cpu_key_k_offset_dec(struct cpu_key *key) -{ - key->on_disk_key.k_offset--; -} - -#define is_direntry_cpu_key(key) (cpu_key_k_type (key) == TYPE_DIRENTRY) -#define is_direct_cpu_key(key) (cpu_key_k_type (key) == TYPE_DIRECT) -#define is_indirect_cpu_key(key) (cpu_key_k_type (key) == TYPE_INDIRECT) -#define is_statdata_cpu_key(key) (cpu_key_k_type (key) == TYPE_STAT_DATA) - -/* are these used ? */ -#define is_direntry_cpu_ih(ih) (is_direntry_cpu_key (&((ih)->ih_key))) -#define is_direct_cpu_ih(ih) (is_direct_cpu_key (&((ih)->ih_key))) -#define is_indirect_cpu_ih(ih) (is_indirect_cpu_key (&((ih)->ih_key))) -#define is_statdata_cpu_ih(ih) (is_statdata_cpu_key (&((ih)->ih_key))) - -#define I_K_KEY_IN_ITEM(ih, key, n_blocksize) \ - (!COMP_SHORT_KEYS(ih, key) && \ - I_OFF_BYTE_IN_ITEM(ih, k_offset(key), n_blocksize)) - -/* maximal length of item */ -#define MAX_ITEM_LEN(block_size) (block_size - BLKH_SIZE - IH_SIZE) -#define MIN_ITEM_LEN 1 - -/* object identifier for root dir */ -#define REISERFS_ROOT_OBJECTID 2 -#define REISERFS_ROOT_PARENT_OBJECTID 1 - -extern struct reiserfs_key root_key; - -/* - * Picture represents a leaf of the S+tree - * ______________________________________________________ - * | | Array of | | | - * |Block | Object-Item | F r e e | Objects- | - * | head | Headers | S p a c e | Items | - * |______|_______________|___________________|___________| - */ - -/* Header of a disk block. More precisely, header of a formatted leaf - or internal node, and not the header of an unformatted node. */ -struct block_head { - __le16 blk_level; /* Level of a block in the tree. */ - __le16 blk_nr_item; /* Number of keys/items in a block. */ - __le16 blk_free_space; /* Block free space in bytes. */ - __le16 blk_reserved; - /* dump this in v4/planA */ - struct reiserfs_key blk_right_delim_key; /* kept only for compatibility */ -}; - -#define BLKH_SIZE (sizeof(struct block_head)) -#define blkh_level(p_blkh) (le16_to_cpu((p_blkh)->blk_level)) -#define blkh_nr_item(p_blkh) (le16_to_cpu((p_blkh)->blk_nr_item)) -#define blkh_free_space(p_blkh) (le16_to_cpu((p_blkh)->blk_free_space)) -#define blkh_reserved(p_blkh) (le16_to_cpu((p_blkh)->blk_reserved)) -#define set_blkh_level(p_blkh,val) ((p_blkh)->blk_level = cpu_to_le16(val)) -#define set_blkh_nr_item(p_blkh,val) ((p_blkh)->blk_nr_item = cpu_to_le16(val)) -#define set_blkh_free_space(p_blkh,val) ((p_blkh)->blk_free_space = cpu_to_le16(val)) -#define set_blkh_reserved(p_blkh,val) ((p_blkh)->blk_reserved = cpu_to_le16(val)) -#define blkh_right_delim_key(p_blkh) ((p_blkh)->blk_right_delim_key) -#define set_blkh_right_delim_key(p_blkh,val) ((p_blkh)->blk_right_delim_key = val) - -/* - * values for blk_level field of the struct block_head - */ - -#define FREE_LEVEL 0 /* when node gets removed from the tree its - blk_level is set to FREE_LEVEL. It is then - used to see whether the node is still in the - tree */ - -#define DISK_LEAF_NODE_LEVEL 1 /* Leaf node level. */ - -/* Given the buffer head of a formatted node, resolve to the block head of that node. */ -#define B_BLK_HEAD(bh) ((struct block_head *)((bh)->b_data)) -/* Number of items that are in buffer. */ -#define B_NR_ITEMS(bh) (blkh_nr_item(B_BLK_HEAD(bh))) -#define B_LEVEL(bh) (blkh_level(B_BLK_HEAD(bh))) -#define B_FREE_SPACE(bh) (blkh_free_space(B_BLK_HEAD(bh))) - -#define PUT_B_NR_ITEMS(bh, val) do { set_blkh_nr_item(B_BLK_HEAD(bh), val); } while (0) -#define PUT_B_LEVEL(bh, val) do { set_blkh_level(B_BLK_HEAD(bh), val); } while (0) -#define PUT_B_FREE_SPACE(bh, val) do { set_blkh_free_space(B_BLK_HEAD(bh), val); } while (0) - -/* Get right delimiting key. -- little endian */ -#define B_PRIGHT_DELIM_KEY(bh) (&(blk_right_delim_key(B_BLK_HEAD(bh)))) - -/* Does the buffer contain a disk leaf. */ -#define B_IS_ITEMS_LEVEL(bh) (B_LEVEL(bh) == DISK_LEAF_NODE_LEVEL) - -/* Does the buffer contain a disk internal node */ -#define B_IS_KEYS_LEVEL(bh) (B_LEVEL(bh) > DISK_LEAF_NODE_LEVEL \ - && B_LEVEL(bh) <= MAX_HEIGHT) - -/***************************************************************************/ -/* STAT DATA */ -/***************************************************************************/ - -// -// old stat data is 32 bytes long. We are going to distinguish new one by -// different size -// -struct stat_data_v1 { - __le16 sd_mode; /* file type, permissions */ - __le16 sd_nlink; /* number of hard links */ - __le16 sd_uid; /* owner */ - __le16 sd_gid; /* group */ - __le32 sd_size; /* file size */ - __le32 sd_atime; /* time of last access */ - __le32 sd_mtime; /* time file was last modified */ - __le32 sd_ctime; /* time inode (stat data) was last changed (except changes to sd_atime and sd_mtime) */ - union { - __le32 sd_rdev; - __le32 sd_blocks; /* number of blocks file uses */ - } __attribute__ ((__packed__)) u; - __le32 sd_first_direct_byte; /* first byte of file which is stored - in a direct item: except that if it - equals 1 it is a symlink and if it - equals ~(__u32)0 there is no - direct item. The existence of this - field really grates on me. Let's - replace it with a macro based on - sd_size and our tail suppression - policy. Someday. -Hans */ -} __attribute__ ((__packed__)); - -#define SD_V1_SIZE (sizeof(struct stat_data_v1)) -#define stat_data_v1(ih) (ih_version (ih) == KEY_FORMAT_3_5) -#define sd_v1_mode(sdp) (le16_to_cpu((sdp)->sd_mode)) -#define set_sd_v1_mode(sdp,v) ((sdp)->sd_mode = cpu_to_le16(v)) -#define sd_v1_nlink(sdp) (le16_to_cpu((sdp)->sd_nlink)) -#define set_sd_v1_nlink(sdp,v) ((sdp)->sd_nlink = cpu_to_le16(v)) -#define sd_v1_uid(sdp) (le16_to_cpu((sdp)->sd_uid)) -#define set_sd_v1_uid(sdp,v) ((sdp)->sd_uid = cpu_to_le16(v)) -#define sd_v1_gid(sdp) (le16_to_cpu((sdp)->sd_gid)) -#define set_sd_v1_gid(sdp,v) ((sdp)->sd_gid = cpu_to_le16(v)) -#define sd_v1_size(sdp) (le32_to_cpu((sdp)->sd_size)) -#define set_sd_v1_size(sdp,v) ((sdp)->sd_size = cpu_to_le32(v)) -#define sd_v1_atime(sdp) (le32_to_cpu((sdp)->sd_atime)) -#define set_sd_v1_atime(sdp,v) ((sdp)->sd_atime = cpu_to_le32(v)) -#define sd_v1_mtime(sdp) (le32_to_cpu((sdp)->sd_mtime)) -#define set_sd_v1_mtime(sdp,v) ((sdp)->sd_mtime = cpu_to_le32(v)) -#define sd_v1_ctime(sdp) (le32_to_cpu((sdp)->sd_ctime)) -#define set_sd_v1_ctime(sdp,v) ((sdp)->sd_ctime = cpu_to_le32(v)) -#define sd_v1_rdev(sdp) (le32_to_cpu((sdp)->u.sd_rdev)) -#define set_sd_v1_rdev(sdp,v) ((sdp)->u.sd_rdev = cpu_to_le32(v)) -#define sd_v1_blocks(sdp) (le32_to_cpu((sdp)->u.sd_blocks)) -#define set_sd_v1_blocks(sdp,v) ((sdp)->u.sd_blocks = cpu_to_le32(v)) -#define sd_v1_first_direct_byte(sdp) \ - (le32_to_cpu((sdp)->sd_first_direct_byte)) -#define set_sd_v1_first_direct_byte(sdp,v) \ - ((sdp)->sd_first_direct_byte = cpu_to_le32(v)) - -/* inode flags stored in sd_attrs (nee sd_reserved) */ - -/* we want common flags to have the same values as in ext2, - so chattr(1) will work without problems */ -#define REISERFS_IMMUTABLE_FL FS_IMMUTABLE_FL -#define REISERFS_APPEND_FL FS_APPEND_FL -#define REISERFS_SYNC_FL FS_SYNC_FL -#define REISERFS_NOATIME_FL FS_NOATIME_FL -#define REISERFS_NODUMP_FL FS_NODUMP_FL -#define REISERFS_SECRM_FL FS_SECRM_FL -#define REISERFS_UNRM_FL FS_UNRM_FL -#define REISERFS_COMPR_FL FS_COMPR_FL -#define REISERFS_NOTAIL_FL FS_NOTAIL_FL - -/* persistent flags that file inherits from the parent directory */ -#define REISERFS_INHERIT_MASK ( REISERFS_IMMUTABLE_FL | \ - REISERFS_SYNC_FL | \ - REISERFS_NOATIME_FL | \ - REISERFS_NODUMP_FL | \ - REISERFS_SECRM_FL | \ - REISERFS_COMPR_FL | \ - REISERFS_NOTAIL_FL ) - -/* Stat Data on disk (reiserfs version of UFS disk inode minus the - address blocks) */ -struct stat_data { - __le16 sd_mode; /* file type, permissions */ - __le16 sd_attrs; /* persistent inode flags */ - __le32 sd_nlink; /* number of hard links */ - __le64 sd_size; /* file size */ - __le32 sd_uid; /* owner */ - __le32 sd_gid; /* group */ - __le32 sd_atime; /* time of last access */ - __le32 sd_mtime; /* time file was last modified */ - __le32 sd_ctime; /* time inode (stat data) was last changed (except changes to sd_atime and sd_mtime) */ - __le32 sd_blocks; - union { - __le32 sd_rdev; - __le32 sd_generation; - //__le32 sd_first_direct_byte; - /* first byte of file which is stored in a - direct item: except that if it equals 1 - it is a symlink and if it equals - ~(__u32)0 there is no direct item. The - existence of this field really grates - on me. Let's replace it with a macro - based on sd_size and our tail - suppression policy? */ - } __attribute__ ((__packed__)) u; -} __attribute__ ((__packed__)); -// -// this is 44 bytes long -// -#define SD_SIZE (sizeof(struct stat_data)) -#define SD_V2_SIZE SD_SIZE -#define stat_data_v2(ih) (ih_version (ih) == KEY_FORMAT_3_6) -#define sd_v2_mode(sdp) (le16_to_cpu((sdp)->sd_mode)) -#define set_sd_v2_mode(sdp,v) ((sdp)->sd_mode = cpu_to_le16(v)) -/* sd_reserved */ -/* set_sd_reserved */ -#define sd_v2_nlink(sdp) (le32_to_cpu((sdp)->sd_nlink)) -#define set_sd_v2_nlink(sdp,v) ((sdp)->sd_nlink = cpu_to_le32(v)) -#define sd_v2_size(sdp) (le64_to_cpu((sdp)->sd_size)) -#define set_sd_v2_size(sdp,v) ((sdp)->sd_size = cpu_to_le64(v)) -#define sd_v2_uid(sdp) (le32_to_cpu((sdp)->sd_uid)) -#define set_sd_v2_uid(sdp,v) ((sdp)->sd_uid = cpu_to_le32(v)) -#define sd_v2_gid(sdp) (le32_to_cpu((sdp)->sd_gid)) -#define set_sd_v2_gid(sdp,v) ((sdp)->sd_gid = cpu_to_le32(v)) -#define sd_v2_atime(sdp) (le32_to_cpu((sdp)->sd_atime)) -#define set_sd_v2_atime(sdp,v) ((sdp)->sd_atime = cpu_to_le32(v)) -#define sd_v2_mtime(sdp) (le32_to_cpu((sdp)->sd_mtime)) -#define set_sd_v2_mtime(sdp,v) ((sdp)->sd_mtime = cpu_to_le32(v)) -#define sd_v2_ctime(sdp) (le32_to_cpu((sdp)->sd_ctime)) -#define set_sd_v2_ctime(sdp,v) ((sdp)->sd_ctime = cpu_to_le32(v)) -#define sd_v2_blocks(sdp) (le32_to_cpu((sdp)->sd_blocks)) -#define set_sd_v2_blocks(sdp,v) ((sdp)->sd_blocks = cpu_to_le32(v)) -#define sd_v2_rdev(sdp) (le32_to_cpu((sdp)->u.sd_rdev)) -#define set_sd_v2_rdev(sdp,v) ((sdp)->u.sd_rdev = cpu_to_le32(v)) -#define sd_v2_generation(sdp) (le32_to_cpu((sdp)->u.sd_generation)) -#define set_sd_v2_generation(sdp,v) ((sdp)->u.sd_generation = cpu_to_le32(v)) -#define sd_v2_attrs(sdp) (le16_to_cpu((sdp)->sd_attrs)) -#define set_sd_v2_attrs(sdp,v) ((sdp)->sd_attrs = cpu_to_le16(v)) - -/***************************************************************************/ -/* DIRECTORY STRUCTURE */ -/***************************************************************************/ -/* - Picture represents the structure of directory items - ________________________________________________ - | Array of | | | | | | - | directory |N-1| N-2 | .... | 1st |0th| - | entry headers | | | | | | - |_______________|___|_____|________|_______|___| - <---- directory entries ------> - - First directory item has k_offset component 1. We store "." and ".." - in one item, always, we never split "." and ".." into differing - items. This makes, among other things, the code for removing - directories simpler. */ -#define SD_OFFSET 0 -#define SD_UNIQUENESS 0 -#define DOT_OFFSET 1 -#define DOT_DOT_OFFSET 2 -#define DIRENTRY_UNIQUENESS 500 - -/* */ -#define FIRST_ITEM_OFFSET 1 - -/* - Q: How to get key of object pointed to by entry from entry? - - A: Each directory entry has its header. This header has deh_dir_id and deh_objectid fields, those are key - of object, entry points to */ - -/* NOT IMPLEMENTED: - Directory will someday contain stat data of object */ - -struct reiserfs_de_head { - __le32 deh_offset; /* third component of the directory entry key */ - __le32 deh_dir_id; /* objectid of the parent directory of the object, that is referenced - by directory entry */ - __le32 deh_objectid; /* objectid of the object, that is referenced by directory entry */ - __le16 deh_location; /* offset of name in the whole item */ - __le16 deh_state; /* whether 1) entry contains stat data (for future), and 2) whether - entry is hidden (unlinked) */ -} __attribute__ ((__packed__)); -#define DEH_SIZE sizeof(struct reiserfs_de_head) -#define deh_offset(p_deh) (le32_to_cpu((p_deh)->deh_offset)) -#define deh_dir_id(p_deh) (le32_to_cpu((p_deh)->deh_dir_id)) -#define deh_objectid(p_deh) (le32_to_cpu((p_deh)->deh_objectid)) -#define deh_location(p_deh) (le16_to_cpu((p_deh)->deh_location)) -#define deh_state(p_deh) (le16_to_cpu((p_deh)->deh_state)) - -#define put_deh_offset(p_deh,v) ((p_deh)->deh_offset = cpu_to_le32((v))) -#define put_deh_dir_id(p_deh,v) ((p_deh)->deh_dir_id = cpu_to_le32((v))) -#define put_deh_objectid(p_deh,v) ((p_deh)->deh_objectid = cpu_to_le32((v))) -#define put_deh_location(p_deh,v) ((p_deh)->deh_location = cpu_to_le16((v))) -#define put_deh_state(p_deh,v) ((p_deh)->deh_state = cpu_to_le16((v))) - -/* empty directory contains two entries "." and ".." and their headers */ -#define EMPTY_DIR_SIZE \ -(DEH_SIZE * 2 + ROUND_UP (strlen (".")) + ROUND_UP (strlen (".."))) - -/* old format directories have this size when empty */ -#define EMPTY_DIR_SIZE_V1 (DEH_SIZE * 2 + 3) - -#define DEH_Statdata 0 /* not used now */ -#define DEH_Visible 2 - -/* 64 bit systems (and the S/390) need to be aligned explicitly -jdm */ -#if BITS_PER_LONG == 64 || defined(__s390__) || defined(__hppa__) -# define ADDR_UNALIGNED_BITS (3) -#endif - -/* These are only used to manipulate deh_state. - * Because of this, we'll use the ext2_ bit routines, - * since they are little endian */ -#ifdef ADDR_UNALIGNED_BITS - -# define aligned_address(addr) ((void *)((long)(addr) & ~((1UL << ADDR_UNALIGNED_BITS) - 1))) -# define unaligned_offset(addr) (((int)((long)(addr) & ((1 << ADDR_UNALIGNED_BITS) - 1))) << 3) - -# define set_bit_unaligned(nr, addr) \ - __test_and_set_bit_le((nr) + unaligned_offset(addr), aligned_address(addr)) -# define clear_bit_unaligned(nr, addr) \ - __test_and_clear_bit_le((nr) + unaligned_offset(addr), aligned_address(addr)) -# define test_bit_unaligned(nr, addr) \ - test_bit_le((nr) + unaligned_offset(addr), aligned_address(addr)) - -#else - -# define set_bit_unaligned(nr, addr) __test_and_set_bit_le(nr, addr) -# define clear_bit_unaligned(nr, addr) __test_and_clear_bit_le(nr, addr) -# define test_bit_unaligned(nr, addr) test_bit_le(nr, addr) - -#endif - -#define mark_de_with_sd(deh) set_bit_unaligned (DEH_Statdata, &((deh)->deh_state)) -#define mark_de_without_sd(deh) clear_bit_unaligned (DEH_Statdata, &((deh)->deh_state)) -#define mark_de_visible(deh) set_bit_unaligned (DEH_Visible, &((deh)->deh_state)) -#define mark_de_hidden(deh) clear_bit_unaligned (DEH_Visible, &((deh)->deh_state)) - -#define de_with_sd(deh) test_bit_unaligned (DEH_Statdata, &((deh)->deh_state)) -#define de_visible(deh) test_bit_unaligned (DEH_Visible, &((deh)->deh_state)) -#define de_hidden(deh) !test_bit_unaligned (DEH_Visible, &((deh)->deh_state)) - -extern void make_empty_dir_item_v1(char *body, __le32 dirid, __le32 objid, - __le32 par_dirid, __le32 par_objid); -extern void make_empty_dir_item(char *body, __le32 dirid, __le32 objid, - __le32 par_dirid, __le32 par_objid); - -/* array of the entry headers */ - /* get item body */ -#define B_I_PITEM(bh,ih) ( (bh)->b_data + ih_location(ih) ) -#define B_I_DEH(bh,ih) ((struct reiserfs_de_head *)(B_I_PITEM(bh,ih))) - -/* length of the directory entry in directory item. This define - calculates length of i-th directory entry using directory entry - locations from dir entry head. When it calculates length of 0-th - directory entry, it uses length of whole item in place of entry - location of the non-existent following entry in the calculation. - See picture above.*/ -/* -#define I_DEH_N_ENTRY_LENGTH(ih,deh,i) \ -((i) ? (deh_location((deh)-1) - deh_location((deh))) : (ih_item_len((ih)) - deh_location((deh)))) -*/ -static inline int entry_length(const struct buffer_head *bh, - const struct item_head *ih, int pos_in_item) -{ - struct reiserfs_de_head *deh; - - deh = B_I_DEH(bh, ih) + pos_in_item; - if (pos_in_item) - return deh_location(deh - 1) - deh_location(deh); - - return ih_item_len(ih) - deh_location(deh); -} - -/* number of entries in the directory item, depends on ENTRY_COUNT being at the start of directory dynamic data. */ -#define I_ENTRY_COUNT(ih) (ih_entry_count((ih))) - -/* name by bh, ih and entry_num */ -#define B_I_E_NAME(bh,ih,entry_num) ((char *)(bh->b_data + ih_location(ih) + deh_location(B_I_DEH(bh,ih)+(entry_num)))) - -// two entries per block (at least) -#define REISERFS_MAX_NAME(block_size) 255 - -/* this structure is used for operations on directory entries. It is - not a disk structure. */ -/* When reiserfs_find_entry or search_by_entry_key find directory - entry, they return filled reiserfs_dir_entry structure */ -struct reiserfs_dir_entry { - struct buffer_head *de_bh; - int de_item_num; - struct item_head *de_ih; - int de_entry_num; - struct reiserfs_de_head *de_deh; - int de_entrylen; - int de_namelen; - char *de_name; - unsigned long *de_gen_number_bit_string; - - __u32 de_dir_id; - __u32 de_objectid; - - struct cpu_key de_entry_key; -}; - -/* these defines are useful when a particular member of a reiserfs_dir_entry is needed */ - -/* pointer to file name, stored in entry */ -#define B_I_DEH_ENTRY_FILE_NAME(bh,ih,deh) (B_I_PITEM (bh, ih) + deh_location(deh)) - -/* length of name */ -#define I_DEH_N_ENTRY_FILE_NAME_LENGTH(ih,deh,entry_num) \ -(I_DEH_N_ENTRY_LENGTH (ih, deh, entry_num) - (de_with_sd (deh) ? SD_SIZE : 0)) - -/* hash value occupies bits from 7 up to 30 */ -#define GET_HASH_VALUE(offset) ((offset) & 0x7fffff80LL) -/* generation number occupies 7 bits starting from 0 up to 6 */ -#define GET_GENERATION_NUMBER(offset) ((offset) & 0x7fLL) -#define MAX_GENERATION_NUMBER 127 - -#define SET_GENERATION_NUMBER(offset,gen_number) (GET_HASH_VALUE(offset)|(gen_number)) - -/* - * Picture represents an internal node of the reiserfs tree - * ______________________________________________________ - * | | Array of | Array of | Free | - * |block | keys | pointers | space | - * | head | N | N+1 | | - * |______|_______________|___________________|___________| - */ - -/***************************************************************************/ -/* DISK CHILD */ -/***************************************************************************/ -/* Disk child pointer: The pointer from an internal node of the tree - to a node that is on disk. */ -struct disk_child { - __le32 dc_block_number; /* Disk child's block number. */ - __le16 dc_size; /* Disk child's used space. */ - __le16 dc_reserved; -}; - -#define DC_SIZE (sizeof(struct disk_child)) -#define dc_block_number(dc_p) (le32_to_cpu((dc_p)->dc_block_number)) -#define dc_size(dc_p) (le16_to_cpu((dc_p)->dc_size)) -#define put_dc_block_number(dc_p, val) do { (dc_p)->dc_block_number = cpu_to_le32(val); } while(0) -#define put_dc_size(dc_p, val) do { (dc_p)->dc_size = cpu_to_le16(val); } while(0) - -/* Get disk child by buffer header and position in the tree node. */ -#define B_N_CHILD(bh, n_pos) ((struct disk_child *)\ -((bh)->b_data + BLKH_SIZE + B_NR_ITEMS(bh) * KEY_SIZE + DC_SIZE * (n_pos))) - -/* Get disk child number by buffer header and position in the tree node. */ -#define B_N_CHILD_NUM(bh, n_pos) (dc_block_number(B_N_CHILD(bh, n_pos))) -#define PUT_B_N_CHILD_NUM(bh, n_pos, val) \ - (put_dc_block_number(B_N_CHILD(bh, n_pos), val)) - - /* maximal value of field child_size in structure disk_child */ - /* child size is the combined size of all items and their headers */ -#define MAX_CHILD_SIZE(bh) ((int)( (bh)->b_size - BLKH_SIZE )) - -/* amount of used space in buffer (not including block head) */ -#define B_CHILD_SIZE(cur) (MAX_CHILD_SIZE(cur)-(B_FREE_SPACE(cur))) - -/* max and min number of keys in internal node */ -#define MAX_NR_KEY(bh) ( (MAX_CHILD_SIZE(bh)-DC_SIZE)/(KEY_SIZE+DC_SIZE) ) -#define MIN_NR_KEY(bh) (MAX_NR_KEY(bh)/2) - -/***************************************************************************/ -/* PATH STRUCTURES AND DEFINES */ -/***************************************************************************/ - -/* Search_by_key fills up the path from the root to the leaf as it descends the tree looking for the - key. It uses reiserfs_bread to try to find buffers in the cache given their block number. If it - does not find them in the cache it reads them from disk. For each node search_by_key finds using - reiserfs_bread it then uses bin_search to look through that node. bin_search will find the - position of the block_number of the next node if it is looking through an internal node. If it - is looking through a leaf node bin_search will find the position of the item which has key either - equal to given key, or which is the maximal key less than the given key. */ - -struct path_element { - struct buffer_head *pe_buffer; /* Pointer to the buffer at the path in the tree. */ - int pe_position; /* Position in the tree node which is placed in the */ - /* buffer above. */ -}; - -#define MAX_HEIGHT 5 /* maximal height of a tree. don't change this without changing JOURNAL_PER_BALANCE_CNT */ -#define EXTENDED_MAX_HEIGHT 7 /* Must be equals MAX_HEIGHT + FIRST_PATH_ELEMENT_OFFSET */ -#define FIRST_PATH_ELEMENT_OFFSET 2 /* Must be equal to at least 2. */ - -#define ILLEGAL_PATH_ELEMENT_OFFSET 1 /* Must be equal to FIRST_PATH_ELEMENT_OFFSET - 1 */ -#define MAX_FEB_SIZE 6 /* this MUST be MAX_HEIGHT + 1. See about FEB below */ - -/* We need to keep track of who the ancestors of nodes are. When we - perform a search we record which nodes were visited while - descending the tree looking for the node we searched for. This list - of nodes is called the path. This information is used while - performing balancing. Note that this path information may become - invalid, and this means we must check it when using it to see if it - is still valid. You'll need to read search_by_key and the comments - in it, especially about decrement_counters_in_path(), to understand - this structure. - -Paths make the code so much harder to work with and debug.... An -enormous number of bugs are due to them, and trying to write or modify -code that uses them just makes my head hurt. They are based on an -excessive effort to avoid disturbing the precious VFS code.:-( The -gods only know how we are going to SMP the code that uses them. -znodes are the way! */ - -#define PATH_READA 0x1 /* do read ahead */ -#define PATH_READA_BACK 0x2 /* read backwards */ - -struct treepath { - int path_length; /* Length of the array above. */ - int reada; - struct path_element path_elements[EXTENDED_MAX_HEIGHT]; /* Array of the path elements. */ - int pos_in_item; -}; - -#define pos_in_item(path) ((path)->pos_in_item) - -#define INITIALIZE_PATH(var) \ -struct treepath var = {.path_length = ILLEGAL_PATH_ELEMENT_OFFSET, .reada = 0,} - -/* Get path element by path and path position. */ -#define PATH_OFFSET_PELEMENT(path, n_offset) ((path)->path_elements + (n_offset)) - -/* Get buffer header at the path by path and path position. */ -#define PATH_OFFSET_PBUFFER(path, n_offset) (PATH_OFFSET_PELEMENT(path, n_offset)->pe_buffer) - -/* Get position in the element at the path by path and path position. */ -#define PATH_OFFSET_POSITION(path, n_offset) (PATH_OFFSET_PELEMENT(path, n_offset)->pe_position) - -#define PATH_PLAST_BUFFER(path) (PATH_OFFSET_PBUFFER((path), (path)->path_length)) - /* you know, to the person who didn't - write this the macro name does not - at first suggest what it does. - Maybe POSITION_FROM_PATH_END? Or - maybe we should just focus on - dumping paths... -Hans */ -#define PATH_LAST_POSITION(path) (PATH_OFFSET_POSITION((path), (path)->path_length)) - -#define PATH_PITEM_HEAD(path) B_N_PITEM_HEAD(PATH_PLAST_BUFFER(path), PATH_LAST_POSITION(path)) - -/* in do_balance leaf has h == 0 in contrast with path structure, - where root has level == 0. That is why we need these defines */ -#define PATH_H_PBUFFER(path, h) PATH_OFFSET_PBUFFER (path, path->path_length - (h)) /* tb->S[h] */ -#define PATH_H_PPARENT(path, h) PATH_H_PBUFFER (path, (h) + 1) /* tb->F[h] or tb->S[0]->b_parent */ -#define PATH_H_POSITION(path, h) PATH_OFFSET_POSITION (path, path->path_length - (h)) -#define PATH_H_B_ITEM_ORDER(path, h) PATH_H_POSITION(path, h + 1) /* tb->S[h]->b_item_order */ - -#define PATH_H_PATH_OFFSET(path, n_h) ((path)->path_length - (n_h)) - -#define get_last_bh(path) PATH_PLAST_BUFFER(path) -#define get_ih(path) PATH_PITEM_HEAD(path) -#define get_item_pos(path) PATH_LAST_POSITION(path) -#define get_item(path) ((void *)B_N_PITEM(PATH_PLAST_BUFFER(path), PATH_LAST_POSITION (path))) -#define item_moved(ih,path) comp_items(ih, path) -#define path_changed(ih,path) comp_items (ih, path) - -/***************************************************************************/ -/* MISC */ -/***************************************************************************/ - -/* Size of pointer to the unformatted node. */ -#define UNFM_P_SIZE (sizeof(unp_t)) -#define UNFM_P_SHIFT 2 - -// in in-core inode key is stored on le form -#define INODE_PKEY(inode) ((struct reiserfs_key *)(REISERFS_I(inode)->i_key)) - -#define MAX_UL_INT 0xffffffff -#define MAX_INT 0x7ffffff -#define MAX_US_INT 0xffff - -// reiserfs version 2 has max offset 60 bits. Version 1 - 32 bit offset -#define U32_MAX (~(__u32)0) - -static inline loff_t max_reiserfs_offset(struct inode *inode) -{ - if (get_inode_item_key_version(inode) == KEY_FORMAT_3_5) - return (loff_t) U32_MAX; - - return (loff_t) ((~(__u64) 0) >> 4); -} - -/*#define MAX_KEY_UNIQUENESS MAX_UL_INT*/ -#define MAX_KEY_OBJECTID MAX_UL_INT - -#define MAX_B_NUM MAX_UL_INT -#define MAX_FC_NUM MAX_US_INT - -/* the purpose is to detect overflow of an unsigned short */ -#define REISERFS_LINK_MAX (MAX_US_INT - 1000) - -/* The following defines are used in reiserfs_insert_item and reiserfs_append_item */ -#define REISERFS_KERNEL_MEM 0 /* reiserfs kernel memory mode */ -#define REISERFS_USER_MEM 1 /* reiserfs user memory mode */ - -#define fs_generation(s) (REISERFS_SB(s)->s_generation_counter) -#define get_generation(s) atomic_read (&fs_generation(s)) -#define FILESYSTEM_CHANGED_TB(tb) (get_generation((tb)->tb_sb) != (tb)->fs_gen) -#define __fs_changed(gen,s) (gen != get_generation (s)) -#define fs_changed(gen,s) \ -({ \ - reiserfs_cond_resched(s); \ - __fs_changed(gen, s); \ -}) - -/***************************************************************************/ -/* FIXATE NODES */ -/***************************************************************************/ - -#define VI_TYPE_LEFT_MERGEABLE 1 -#define VI_TYPE_RIGHT_MERGEABLE 2 - -/* To make any changes in the tree we always first find node, that - contains item to be changed/deleted or place to insert a new - item. We call this node S. To do balancing we need to decide what - we will shift to left/right neighbor, or to a new node, where new - item will be etc. To make this analysis simpler we build virtual - node. Virtual node is an array of items, that will replace items of - node S. (For instance if we are going to delete an item, virtual - node does not contain it). Virtual node keeps information about - item sizes and types, mergeability of first and last items, sizes - of all entries in directory item. We use this array of items when - calculating what we can shift to neighbors and how many nodes we - have to have if we do not any shiftings, if we shift to left/right - neighbor or to both. */ -struct virtual_item { - int vi_index; // index in the array of item operations - unsigned short vi_type; // left/right mergeability - unsigned short vi_item_len; /* length of item that it will have after balancing */ - struct item_head *vi_ih; - const char *vi_item; // body of item (old or new) - const void *vi_new_data; // 0 always but paste mode - void *vi_uarea; // item specific area -}; - -struct virtual_node { - char *vn_free_ptr; /* this is a pointer to the free space in the buffer */ - unsigned short vn_nr_item; /* number of items in virtual node */ - short vn_size; /* size of node , that node would have if it has unlimited size and no balancing is performed */ - short vn_mode; /* mode of balancing (paste, insert, delete, cut) */ - short vn_affected_item_num; - short vn_pos_in_item; - struct item_head *vn_ins_ih; /* item header of inserted item, 0 for other modes */ - const void *vn_data; - struct virtual_item *vn_vi; /* array of items (including a new one, excluding item to be deleted) */ -}; - -/* used by directory items when creating virtual nodes */ -struct direntry_uarea { - int flags; - __u16 entry_count; - __u16 entry_sizes[1]; -} __attribute__ ((__packed__)); - -/***************************************************************************/ -/* TREE BALANCE */ -/***************************************************************************/ - -/* This temporary structure is used in tree balance algorithms, and - constructed as we go to the extent that its various parts are - needed. It contains arrays of nodes that can potentially be - involved in the balancing of node S, and parameters that define how - each of the nodes must be balanced. Note that in these algorithms - for balancing the worst case is to need to balance the current node - S and the left and right neighbors and all of their parents plus - create a new node. We implement S1 balancing for the leaf nodes - and S0 balancing for the internal nodes (S1 and S0 are defined in - our papers.)*/ - -#define MAX_FREE_BLOCK 7 /* size of the array of buffers to free at end of do_balance */ - -/* maximum number of FEB blocknrs on a single level */ -#define MAX_AMOUNT_NEEDED 2 - -/* someday somebody will prefix every field in this struct with tb_ */ -struct tree_balance { - int tb_mode; - int need_balance_dirty; - struct super_block *tb_sb; - struct reiserfs_transaction_handle *transaction_handle; - struct treepath *tb_path; - struct buffer_head *L[MAX_HEIGHT]; /* array of left neighbors of nodes in the path */ - struct buffer_head *R[MAX_HEIGHT]; /* array of right neighbors of nodes in the path */ - struct buffer_head *FL[MAX_HEIGHT]; /* array of fathers of the left neighbors */ - struct buffer_head *FR[MAX_HEIGHT]; /* array of fathers of the right neighbors */ - struct buffer_head *CFL[MAX_HEIGHT]; /* array of common parents of center node and its left neighbor */ - struct buffer_head *CFR[MAX_HEIGHT]; /* array of common parents of center node and its right neighbor */ - - struct buffer_head *FEB[MAX_FEB_SIZE]; /* array of empty buffers. Number of buffers in array equals - cur_blknum. */ - struct buffer_head *used[MAX_FEB_SIZE]; - struct buffer_head *thrown[MAX_FEB_SIZE]; - int lnum[MAX_HEIGHT]; /* array of number of items which must be - shifted to the left in order to balance the - current node; for leaves includes item that - will be partially shifted; for internal - nodes, it is the number of child pointers - rather than items. It includes the new item - being created. The code sometimes subtracts - one to get the number of wholly shifted - items for other purposes. */ - int rnum[MAX_HEIGHT]; /* substitute right for left in comment above */ - int lkey[MAX_HEIGHT]; /* array indexed by height h mapping the key delimiting L[h] and - S[h] to its item number within the node CFL[h] */ - int rkey[MAX_HEIGHT]; /* substitute r for l in comment above */ - int insert_size[MAX_HEIGHT]; /* the number of bytes by we are trying to add or remove from - S[h]. A negative value means removing. */ - int blknum[MAX_HEIGHT]; /* number of nodes that will replace node S[h] after - balancing on the level h of the tree. If 0 then S is - being deleted, if 1 then S is remaining and no new nodes - are being created, if 2 or 3 then 1 or 2 new nodes is - being created */ - - /* fields that are used only for balancing leaves of the tree */ - int cur_blknum; /* number of empty blocks having been already allocated */ - int s0num; /* number of items that fall into left most node when S[0] splits */ - int s1num; /* number of items that fall into first new node when S[0] splits */ - int s2num; /* number of items that fall into second new node when S[0] splits */ - int lbytes; /* number of bytes which can flow to the left neighbor from the left */ - /* most liquid item that cannot be shifted from S[0] entirely */ - /* if -1 then nothing will be partially shifted */ - int rbytes; /* number of bytes which will flow to the right neighbor from the right */ - /* most liquid item that cannot be shifted from S[0] entirely */ - /* if -1 then nothing will be partially shifted */ - int s1bytes; /* number of bytes which flow to the first new node when S[0] splits */ - /* note: if S[0] splits into 3 nodes, then items do not need to be cut */ - int s2bytes; - struct buffer_head *buf_to_free[MAX_FREE_BLOCK]; /* buffers which are to be freed after do_balance finishes by unfix_nodes */ - char *vn_buf; /* kmalloced memory. Used to create - virtual node and keep map of - dirtied bitmap blocks */ - int vn_buf_size; /* size of the vn_buf */ - struct virtual_node *tb_vn; /* VN starts after bitmap of bitmap blocks */ - - int fs_gen; /* saved value of `reiserfs_generation' counter - see FILESYSTEM_CHANGED() macro in reiserfs_fs.h */ -#ifdef DISPLACE_NEW_PACKING_LOCALITIES - struct in_core_key key; /* key pointer, to pass to block allocator or - another low-level subsystem */ -#endif -}; - -/* These are modes of balancing */ - -/* When inserting an item. */ -#define M_INSERT 'i' -/* When inserting into (directories only) or appending onto an already - existent item. */ -#define M_PASTE 'p' -/* When deleting an item. */ -#define M_DELETE 'd' -/* When truncating an item or removing an entry from a (directory) item. */ -#define M_CUT 'c' - -/* used when balancing on leaf level skipped (in reiserfsck) */ -#define M_INTERNAL 'n' - -/* When further balancing is not needed, then do_balance does not need - to be called. */ -#define M_SKIP_BALANCING 's' -#define M_CONVERT 'v' - -/* modes of leaf_move_items */ -#define LEAF_FROM_S_TO_L 0 -#define LEAF_FROM_S_TO_R 1 -#define LEAF_FROM_R_TO_L 2 -#define LEAF_FROM_L_TO_R 3 -#define LEAF_FROM_S_TO_SNEW 4 - -#define FIRST_TO_LAST 0 -#define LAST_TO_FIRST 1 - -/* used in do_balance for passing parent of node information that has - been gotten from tb struct */ -struct buffer_info { - struct tree_balance *tb; - struct buffer_head *bi_bh; - struct buffer_head *bi_parent; - int bi_position; -}; - -static inline struct super_block *sb_from_tb(struct tree_balance *tb) -{ - return tb ? tb->tb_sb : NULL; -} - -static inline struct super_block *sb_from_bi(struct buffer_info *bi) -{ - return bi ? sb_from_tb(bi->tb) : NULL; -} - -/* there are 4 types of items: stat data, directory item, indirect, direct. -+-------------------+------------+--------------+------------+ -| | k_offset | k_uniqueness | mergeable? | -+-------------------+------------+--------------+------------+ -| stat data | 0 | 0 | no | -+-------------------+------------+--------------+------------+ -| 1st directory item| DOT_OFFSET |DIRENTRY_UNIQUENESS| no | -| non 1st directory | hash value | | yes | -| item | | | | -+-------------------+------------+--------------+------------+ -| indirect item | offset + 1 |TYPE_INDIRECT | if this is not the first indirect item of the object -+-------------------+------------+--------------+------------+ -| direct item | offset + 1 |TYPE_DIRECT | if not this is not the first direct item of the object -+-------------------+------------+--------------+------------+ -*/ - -struct item_operations { - int (*bytes_number) (struct item_head * ih, int block_size); - void (*decrement_key) (struct cpu_key *); - int (*is_left_mergeable) (struct reiserfs_key * ih, - unsigned long bsize); - void (*print_item) (struct item_head *, char *item); - void (*check_item) (struct item_head *, char *item); - - int (*create_vi) (struct virtual_node * vn, struct virtual_item * vi, - int is_affected, int insert_size); - int (*check_left) (struct virtual_item * vi, int free, - int start_skip, int end_skip); - int (*check_right) (struct virtual_item * vi, int free); - int (*part_size) (struct virtual_item * vi, int from, int to); - int (*unit_num) (struct virtual_item * vi); - void (*print_vi) (struct virtual_item * vi); -}; - -extern struct item_operations *item_ops[TYPE_ANY + 1]; - -#define op_bytes_number(ih,bsize) item_ops[le_ih_k_type (ih)]->bytes_number (ih, bsize) -#define op_is_left_mergeable(key,bsize) item_ops[le_key_k_type (le_key_version (key), key)]->is_left_mergeable (key, bsize) -#define op_print_item(ih,item) item_ops[le_ih_k_type (ih)]->print_item (ih, item) -#define op_check_item(ih,item) item_ops[le_ih_k_type (ih)]->check_item (ih, item) -#define op_create_vi(vn,vi,is_affected,insert_size) item_ops[le_ih_k_type ((vi)->vi_ih)]->create_vi (vn,vi,is_affected,insert_size) -#define op_check_left(vi,free,start_skip,end_skip) item_ops[(vi)->vi_index]->check_left (vi, free, start_skip, end_skip) -#define op_check_right(vi,free) item_ops[(vi)->vi_index]->check_right (vi, free) -#define op_part_size(vi,from,to) item_ops[(vi)->vi_index]->part_size (vi, from, to) -#define op_unit_num(vi) item_ops[(vi)->vi_index]->unit_num (vi) -#define op_print_vi(vi) item_ops[(vi)->vi_index]->print_vi (vi) - -#define COMP_SHORT_KEYS comp_short_keys - -/* number of blocks pointed to by the indirect item */ -#define I_UNFM_NUM(ih) (ih_item_len(ih) / UNFM_P_SIZE) - -/* the used space within the unformatted node corresponding to pos within the item pointed to by ih */ -#define I_POS_UNFM_SIZE(ih,pos,size) (((pos) == I_UNFM_NUM(ih) - 1 ) ? (size) - ih_free_space(ih) : (size)) - -/* number of bytes contained by the direct item or the unformatted nodes the indirect item points to */ - -/* get the item header */ -#define B_N_PITEM_HEAD(bh,item_num) ( (struct item_head * )((bh)->b_data + BLKH_SIZE) + (item_num) ) - -/* get key */ -#define B_N_PDELIM_KEY(bh,item_num) ( (struct reiserfs_key * )((bh)->b_data + BLKH_SIZE) + (item_num) ) - -/* get the key */ -#define B_N_PKEY(bh,item_num) ( &(B_N_PITEM_HEAD(bh,item_num)->ih_key) ) - -/* get item body */ -#define B_N_PITEM(bh,item_num) ( (bh)->b_data + ih_location(B_N_PITEM_HEAD((bh),(item_num)))) - -/* get the stat data by the buffer header and the item order */ -#define B_N_STAT_DATA(bh,nr) \ -( (struct stat_data *)((bh)->b_data + ih_location(B_N_PITEM_HEAD((bh),(nr))) ) ) - - /* following defines use reiserfs buffer header and item header */ - -/* get stat-data */ -#define B_I_STAT_DATA(bh, ih) ( (struct stat_data * )((bh)->b_data + ih_location(ih)) ) - -// this is 3976 for size==4096 -#define MAX_DIRECT_ITEM_LEN(size) ((size) - BLKH_SIZE - 2*IH_SIZE - SD_SIZE - UNFM_P_SIZE) - -/* indirect items consist of entries which contain blocknrs, pos - indicates which entry, and B_I_POS_UNFM_POINTER resolves to the - blocknr contained by the entry pos points to */ -#define B_I_POS_UNFM_POINTER(bh,ih,pos) le32_to_cpu(*(((unp_t *)B_I_PITEM(bh,ih)) + (pos))) -#define PUT_B_I_POS_UNFM_POINTER(bh,ih,pos, val) do {*(((unp_t *)B_I_PITEM(bh,ih)) + (pos)) = cpu_to_le32(val); } while (0) - -struct reiserfs_iget_args { - __u32 objectid; - __u32 dirid; -}; - -/***************************************************************************/ -/* FUNCTION DECLARATIONS */ -/***************************************************************************/ - -#define get_journal_desc_magic(bh) (bh->b_data + bh->b_size - 12) - -#define journal_trans_half(blocksize) \ - ((blocksize - sizeof (struct reiserfs_journal_desc) + sizeof (__u32) - 12) / sizeof (__u32)) - -/* journal.c see journal.c for all the comments here */ - -/* first block written in a commit. */ -struct reiserfs_journal_desc { - __le32 j_trans_id; /* id of commit */ - __le32 j_len; /* length of commit. len +1 is the commit block */ - __le32 j_mount_id; /* mount id of this trans */ - __le32 j_realblock[1]; /* real locations for each block */ -}; - -#define get_desc_trans_id(d) le32_to_cpu((d)->j_trans_id) -#define get_desc_trans_len(d) le32_to_cpu((d)->j_len) -#define get_desc_mount_id(d) le32_to_cpu((d)->j_mount_id) - -#define set_desc_trans_id(d,val) do { (d)->j_trans_id = cpu_to_le32 (val); } while (0) -#define set_desc_trans_len(d,val) do { (d)->j_len = cpu_to_le32 (val); } while (0) -#define set_desc_mount_id(d,val) do { (d)->j_mount_id = cpu_to_le32 (val); } while (0) - -/* last block written in a commit */ -struct reiserfs_journal_commit { - __le32 j_trans_id; /* must match j_trans_id from the desc block */ - __le32 j_len; /* ditto */ - __le32 j_realblock[1]; /* real locations for each block */ -}; - -#define get_commit_trans_id(c) le32_to_cpu((c)->j_trans_id) -#define get_commit_trans_len(c) le32_to_cpu((c)->j_len) -#define get_commit_mount_id(c) le32_to_cpu((c)->j_mount_id) - -#define set_commit_trans_id(c,val) do { (c)->j_trans_id = cpu_to_le32 (val); } while (0) -#define set_commit_trans_len(c,val) do { (c)->j_len = cpu_to_le32 (val); } while (0) - -/* this header block gets written whenever a transaction is considered fully flushed, and is more recent than the -** last fully flushed transaction. fully flushed means all the log blocks and all the real blocks are on disk, -** and this transaction does not need to be replayed. -*/ -struct reiserfs_journal_header { - __le32 j_last_flush_trans_id; /* id of last fully flushed transaction */ - __le32 j_first_unflushed_offset; /* offset in the log of where to start replay after a crash */ - __le32 j_mount_id; - /* 12 */ struct journal_params jh_journal; -}; - -/* biggest tunable defines are right here */ -#define JOURNAL_BLOCK_COUNT 8192 /* number of blocks in the journal */ -#define JOURNAL_TRANS_MAX_DEFAULT 1024 /* biggest possible single transaction, don't change for now (8/3/99) */ -#define JOURNAL_TRANS_MIN_DEFAULT 256 -#define JOURNAL_MAX_BATCH_DEFAULT 900 /* max blocks to batch into one transaction, don't make this any bigger than 900 */ -#define JOURNAL_MIN_RATIO 2 -#define JOURNAL_MAX_COMMIT_AGE 30 -#define JOURNAL_MAX_TRANS_AGE 30 -#define JOURNAL_PER_BALANCE_CNT (3 * (MAX_HEIGHT-2) + 9) -#define JOURNAL_BLOCKS_PER_OBJECT(sb) (JOURNAL_PER_BALANCE_CNT * 3 + \ - 2 * (REISERFS_QUOTA_INIT_BLOCKS(sb) + \ - REISERFS_QUOTA_TRANS_BLOCKS(sb))) - -#ifdef CONFIG_QUOTA -#define REISERFS_QUOTA_OPTS ((1 << REISERFS_USRQUOTA) | (1 << REISERFS_GRPQUOTA)) -/* We need to update data and inode (atime) */ -#define REISERFS_QUOTA_TRANS_BLOCKS(s) (REISERFS_SB(s)->s_mount_opt & REISERFS_QUOTA_OPTS ? 2 : 0) -/* 1 balancing, 1 bitmap, 1 data per write + stat data update */ -#define REISERFS_QUOTA_INIT_BLOCKS(s) (REISERFS_SB(s)->s_mount_opt & REISERFS_QUOTA_OPTS ? \ -(DQUOT_INIT_ALLOC*(JOURNAL_PER_BALANCE_CNT+2)+DQUOT_INIT_REWRITE+1) : 0) -/* same as with INIT */ -#define REISERFS_QUOTA_DEL_BLOCKS(s) (REISERFS_SB(s)->s_mount_opt & REISERFS_QUOTA_OPTS ? \ -(DQUOT_DEL_ALLOC*(JOURNAL_PER_BALANCE_CNT+2)+DQUOT_DEL_REWRITE+1) : 0) -#else -#define REISERFS_QUOTA_TRANS_BLOCKS(s) 0 -#define REISERFS_QUOTA_INIT_BLOCKS(s) 0 -#define REISERFS_QUOTA_DEL_BLOCKS(s) 0 -#endif - -/* both of these can be as low as 1, or as high as you want. The min is the -** number of 4k bitmap nodes preallocated on mount. New nodes are allocated -** as needed, and released when transactions are committed. On release, if -** the current number of nodes is > max, the node is freed, otherwise, -** it is put on a free list for faster use later. -*/ -#define REISERFS_MIN_BITMAP_NODES 10 -#define REISERFS_MAX_BITMAP_NODES 100 - -#define JBH_HASH_SHIFT 13 /* these are based on journal hash size of 8192 */ -#define JBH_HASH_MASK 8191 - -#define _jhashfn(sb,block) \ - (((unsigned long)sb>>L1_CACHE_SHIFT) ^ \ - (((block)<<(JBH_HASH_SHIFT - 6)) ^ ((block) >> 13) ^ ((block) << (JBH_HASH_SHIFT - 12)))) -#define journal_hash(t,sb,block) ((t)[_jhashfn((sb),(block)) & JBH_HASH_MASK]) - -// We need these to make journal.c code more readable -#define journal_find_get_block(s, block) __find_get_block(SB_JOURNAL(s)->j_dev_bd, block, s->s_blocksize) -#define journal_getblk(s, block) __getblk(SB_JOURNAL(s)->j_dev_bd, block, s->s_blocksize) -#define journal_bread(s, block) __bread(SB_JOURNAL(s)->j_dev_bd, block, s->s_blocksize) - -enum reiserfs_bh_state_bits { - BH_JDirty = BH_PrivateStart, /* buffer is in current transaction */ - BH_JDirty_wait, - BH_JNew, /* disk block was taken off free list before - * being in a finished transaction, or - * written to disk. Can be reused immed. */ - BH_JPrepared, - BH_JRestore_dirty, - BH_JTest, // debugging only will go away -}; - -BUFFER_FNS(JDirty, journaled); -TAS_BUFFER_FNS(JDirty, journaled); -BUFFER_FNS(JDirty_wait, journal_dirty); -TAS_BUFFER_FNS(JDirty_wait, journal_dirty); -BUFFER_FNS(JNew, journal_new); -TAS_BUFFER_FNS(JNew, journal_new); -BUFFER_FNS(JPrepared, journal_prepared); -TAS_BUFFER_FNS(JPrepared, journal_prepared); -BUFFER_FNS(JRestore_dirty, journal_restore_dirty); -TAS_BUFFER_FNS(JRestore_dirty, journal_restore_dirty); -BUFFER_FNS(JTest, journal_test); -TAS_BUFFER_FNS(JTest, journal_test); - -/* -** transaction handle which is passed around for all journal calls -*/ -struct reiserfs_transaction_handle { - struct super_block *t_super; /* super for this FS when journal_begin was - called. saves calls to reiserfs_get_super - also used by nested transactions to make - sure they are nesting on the right FS - _must_ be first in the handle - */ - int t_refcount; - int t_blocks_logged; /* number of blocks this writer has logged */ - int t_blocks_allocated; /* number of blocks this writer allocated */ - unsigned int t_trans_id; /* sanity check, equals the current trans id */ - void *t_handle_save; /* save existing current->journal_info */ - unsigned displace_new_blocks:1; /* if new block allocation occurres, that block - should be displaced from others */ - struct list_head t_list; -}; - -/* used to keep track of ordered and tail writes, attached to the buffer - * head through b_journal_head. - */ -struct reiserfs_jh { - struct reiserfs_journal_list *jl; - struct buffer_head *bh; - struct list_head list; -}; - -void reiserfs_free_jh(struct buffer_head *bh); -int reiserfs_add_tail_list(struct inode *inode, struct buffer_head *bh); -int reiserfs_add_ordered_list(struct inode *inode, struct buffer_head *bh); -int journal_mark_dirty(struct reiserfs_transaction_handle *, - struct super_block *, struct buffer_head *bh); - -static inline int reiserfs_file_data_log(struct inode *inode) -{ - if (reiserfs_data_log(inode->i_sb) || - (REISERFS_I(inode)->i_flags & i_data_log)) - return 1; - return 0; -} - -static inline int reiserfs_transaction_running(struct super_block *s) -{ - struct reiserfs_transaction_handle *th = current->journal_info; - if (th && th->t_super == s) - return 1; - if (th && th->t_super == NULL) - BUG(); - return 0; -} - -static inline int reiserfs_transaction_free_space(struct reiserfs_transaction_handle *th) -{ - return th->t_blocks_allocated - th->t_blocks_logged; -} - -struct reiserfs_transaction_handle *reiserfs_persistent_transaction(struct - super_block - *, - int count); -int reiserfs_end_persistent_transaction(struct reiserfs_transaction_handle *); -int reiserfs_commit_page(struct inode *inode, struct page *page, - unsigned from, unsigned to); -int reiserfs_flush_old_commits(struct super_block *); -int reiserfs_commit_for_inode(struct inode *); -int reiserfs_inode_needs_commit(struct inode *); -void reiserfs_update_inode_transaction(struct inode *); -void reiserfs_wait_on_write_block(struct super_block *s); -void reiserfs_block_writes(struct reiserfs_transaction_handle *th); -void reiserfs_allow_writes(struct super_block *s); -void reiserfs_check_lock_depth(struct super_block *s, char *caller); -int reiserfs_prepare_for_journal(struct super_block *, struct buffer_head *bh, - int wait); -void reiserfs_restore_prepared_buffer(struct super_block *, - struct buffer_head *bh); -int journal_init(struct super_block *, const char *j_dev_name, int old_format, - unsigned int); -int journal_release(struct reiserfs_transaction_handle *, struct super_block *); -int journal_release_error(struct reiserfs_transaction_handle *, - struct super_block *); -int journal_end(struct reiserfs_transaction_handle *, struct super_block *, - unsigned long); -int journal_end_sync(struct reiserfs_transaction_handle *, struct super_block *, - unsigned long); -int journal_mark_freed(struct reiserfs_transaction_handle *, - struct super_block *, b_blocknr_t blocknr); -int journal_transaction_should_end(struct reiserfs_transaction_handle *, int); -int reiserfs_in_journal(struct super_block *sb, unsigned int bmap_nr, - int bit_nr, int searchall, b_blocknr_t *next); -int journal_begin(struct reiserfs_transaction_handle *, - struct super_block *sb, unsigned long); -int journal_join_abort(struct reiserfs_transaction_handle *, - struct super_block *sb, unsigned long); -void reiserfs_abort_journal(struct super_block *sb, int errno); -void reiserfs_abort(struct super_block *sb, int errno, const char *fmt, ...); -int reiserfs_allocate_list_bitmaps(struct super_block *s, - struct reiserfs_list_bitmap *, unsigned int); - -void add_save_link(struct reiserfs_transaction_handle *th, - struct inode *inode, int truncate); -int remove_save_link(struct inode *inode, int truncate); - -/* objectid.c */ -__u32 reiserfs_get_unused_objectid(struct reiserfs_transaction_handle *th); -void reiserfs_release_objectid(struct reiserfs_transaction_handle *th, - __u32 objectid_to_release); -int reiserfs_convert_objectid_map_v1(struct super_block *); - -/* stree.c */ -int B_IS_IN_TREE(const struct buffer_head *); -extern void copy_item_head(struct item_head *to, - const struct item_head *from); - -// first key is in cpu form, second - le -extern int comp_short_keys(const struct reiserfs_key *le_key, - const struct cpu_key *cpu_key); -extern void le_key2cpu_key(struct cpu_key *to, const struct reiserfs_key *from); - -// both are in le form -extern int comp_le_keys(const struct reiserfs_key *, - const struct reiserfs_key *); -extern int comp_short_le_keys(const struct reiserfs_key *, - const struct reiserfs_key *); - -// -// get key version from on disk key - kludge -// -static inline int le_key_version(const struct reiserfs_key *key) -{ - int type; - - type = offset_v2_k_type(&(key->u.k_offset_v2)); - if (type != TYPE_DIRECT && type != TYPE_INDIRECT - && type != TYPE_DIRENTRY) - return KEY_FORMAT_3_5; - - return KEY_FORMAT_3_6; - -} - -static inline void copy_key(struct reiserfs_key *to, - const struct reiserfs_key *from) -{ - memcpy(to, from, KEY_SIZE); -} - -int comp_items(const struct item_head *stored_ih, const struct treepath *path); -const struct reiserfs_key *get_rkey(const struct treepath *chk_path, - const struct super_block *sb); -int search_by_key(struct super_block *, const struct cpu_key *, - struct treepath *, int); -#define search_item(s,key,path) search_by_key (s, key, path, DISK_LEAF_NODE_LEVEL) -int search_for_position_by_key(struct super_block *sb, - const struct cpu_key *cpu_key, - struct treepath *search_path); -extern void decrement_bcount(struct buffer_head *bh); -void decrement_counters_in_path(struct treepath *search_path); -void pathrelse(struct treepath *search_path); -int reiserfs_check_path(struct treepath *p); -void pathrelse_and_restore(struct super_block *s, struct treepath *search_path); - -int reiserfs_insert_item(struct reiserfs_transaction_handle *th, - struct treepath *path, - const struct cpu_key *key, - struct item_head *ih, - struct inode *inode, const char *body); - -int reiserfs_paste_into_item(struct reiserfs_transaction_handle *th, - struct treepath *path, - const struct cpu_key *key, - struct inode *inode, - const char *body, int paste_size); - -int reiserfs_cut_from_item(struct reiserfs_transaction_handle *th, - struct treepath *path, - struct cpu_key *key, - struct inode *inode, - struct page *page, loff_t new_file_size); - -int reiserfs_delete_item(struct reiserfs_transaction_handle *th, - struct treepath *path, - const struct cpu_key *key, - struct inode *inode, struct buffer_head *un_bh); - -void reiserfs_delete_solid_item(struct reiserfs_transaction_handle *th, - struct inode *inode, struct reiserfs_key *key); -int reiserfs_delete_object(struct reiserfs_transaction_handle *th, - struct inode *inode); -int reiserfs_do_truncate(struct reiserfs_transaction_handle *th, - struct inode *inode, struct page *, - int update_timestamps); - -#define i_block_size(inode) ((inode)->i_sb->s_blocksize) -#define file_size(inode) ((inode)->i_size) -#define tail_size(inode) (file_size (inode) & (i_block_size (inode) - 1)) - -#define tail_has_to_be_packed(inode) (have_large_tails ((inode)->i_sb)?\ -!STORE_TAIL_IN_UNFM_S1(file_size (inode), tail_size(inode), inode->i_sb->s_blocksize):have_small_tails ((inode)->i_sb)?!STORE_TAIL_IN_UNFM_S2(file_size (inode), tail_size(inode), inode->i_sb->s_blocksize):0 ) - -void padd_item(char *item, int total_length, int length); - -/* inode.c */ -/* args for the create parameter of reiserfs_get_block */ -#define GET_BLOCK_NO_CREATE 0 /* don't create new blocks or convert tails */ -#define GET_BLOCK_CREATE 1 /* add anything you need to find block */ -#define GET_BLOCK_NO_HOLE 2 /* return -ENOENT for file holes */ -#define GET_BLOCK_READ_DIRECT 4 /* read the tail if indirect item not found */ -#define GET_BLOCK_NO_IMUX 8 /* i_mutex is not held, don't preallocate */ -#define GET_BLOCK_NO_DANGLE 16 /* don't leave any transactions running */ - -void reiserfs_read_locked_inode(struct inode *inode, - struct reiserfs_iget_args *args); -int reiserfs_find_actor(struct inode *inode, void *p); -int reiserfs_init_locked_inode(struct inode *inode, void *p); -void reiserfs_evict_inode(struct inode *inode); -int reiserfs_write_inode(struct inode *inode, struct writeback_control *wbc); -int reiserfs_get_block(struct inode *inode, sector_t block, - struct buffer_head *bh_result, int create); -struct dentry *reiserfs_fh_to_dentry(struct super_block *sb, struct fid *fid, - int fh_len, int fh_type); -struct dentry *reiserfs_fh_to_parent(struct super_block *sb, struct fid *fid, - int fh_len, int fh_type); -int reiserfs_encode_fh(struct dentry *dentry, __u32 * data, int *lenp, - int connectable); - -int reiserfs_truncate_file(struct inode *, int update_timestamps); -void make_cpu_key(struct cpu_key *cpu_key, struct inode *inode, loff_t offset, - int type, int key_length); -void make_le_item_head(struct item_head *ih, const struct cpu_key *key, - int version, - loff_t offset, int type, int length, int entry_count); -struct inode *reiserfs_iget(struct super_block *s, const struct cpu_key *key); - -struct reiserfs_security_handle; -int reiserfs_new_inode(struct reiserfs_transaction_handle *th, - struct inode *dir, umode_t mode, - const char *symname, loff_t i_size, - struct dentry *dentry, struct inode *inode, - struct reiserfs_security_handle *security); - -void reiserfs_update_sd_size(struct reiserfs_transaction_handle *th, - struct inode *inode, loff_t size); - -static inline void reiserfs_update_sd(struct reiserfs_transaction_handle *th, - struct inode *inode) -{ - reiserfs_update_sd_size(th, inode, inode->i_size); -} - -void sd_attrs_to_i_attrs(__u16 sd_attrs, struct inode *inode); -void i_attrs_to_sd_attrs(struct inode *inode, __u16 * sd_attrs); -int reiserfs_setattr(struct dentry *dentry, struct iattr *attr); - -int __reiserfs_write_begin(struct page *page, unsigned from, unsigned len); - -/* namei.c */ -void set_de_name_and_namelen(struct reiserfs_dir_entry *de); -int search_by_entry_key(struct super_block *sb, const struct cpu_key *key, - struct treepath *path, struct reiserfs_dir_entry *de); -struct dentry *reiserfs_get_parent(struct dentry *); - -#ifdef CONFIG_REISERFS_PROC_INFO -int reiserfs_proc_info_init(struct super_block *sb); -int reiserfs_proc_info_done(struct super_block *sb); -int reiserfs_proc_info_global_init(void); -int reiserfs_proc_info_global_done(void); - -#define PROC_EXP( e ) e - -#define __PINFO( sb ) REISERFS_SB(sb) -> s_proc_info_data -#define PROC_INFO_MAX( sb, field, value ) \ - __PINFO( sb ).field = \ - max( REISERFS_SB( sb ) -> s_proc_info_data.field, value ) -#define PROC_INFO_INC( sb, field ) ( ++ ( __PINFO( sb ).field ) ) -#define PROC_INFO_ADD( sb, field, val ) ( __PINFO( sb ).field += ( val ) ) -#define PROC_INFO_BH_STAT( sb, bh, level ) \ - PROC_INFO_INC( sb, sbk_read_at[ ( level ) ] ); \ - PROC_INFO_ADD( sb, free_at[ ( level ) ], B_FREE_SPACE( bh ) ); \ - PROC_INFO_ADD( sb, items_at[ ( level ) ], B_NR_ITEMS( bh ) ) -#else -static inline int reiserfs_proc_info_init(struct super_block *sb) -{ - return 0; -} - -static inline int reiserfs_proc_info_done(struct super_block *sb) -{ - return 0; -} - -static inline int reiserfs_proc_info_global_init(void) -{ - return 0; -} - -static inline int reiserfs_proc_info_global_done(void) -{ - return 0; -} - -#define PROC_EXP( e ) -#define VOID_V ( ( void ) 0 ) -#define PROC_INFO_MAX( sb, field, value ) VOID_V -#define PROC_INFO_INC( sb, field ) VOID_V -#define PROC_INFO_ADD( sb, field, val ) VOID_V -#define PROC_INFO_BH_STAT(sb, bh, n_node_level) VOID_V -#endif - -/* dir.c */ -extern const struct inode_operations reiserfs_dir_inode_operations; -extern const struct inode_operations reiserfs_symlink_inode_operations; -extern const struct inode_operations reiserfs_special_inode_operations; -extern const struct file_operations reiserfs_dir_operations; -int reiserfs_readdir_dentry(struct dentry *, void *, filldir_t, loff_t *); - -/* tail_conversion.c */ -int direct2indirect(struct reiserfs_transaction_handle *, struct inode *, - struct treepath *, struct buffer_head *, loff_t); -int indirect2direct(struct reiserfs_transaction_handle *, struct inode *, - struct page *, struct treepath *, const struct cpu_key *, - loff_t, char *); -void reiserfs_unmap_buffer(struct buffer_head *); - -/* file.c */ -extern const struct inode_operations reiserfs_file_inode_operations; -extern const struct file_operations reiserfs_file_operations; -extern const struct address_space_operations reiserfs_address_space_operations; - -/* fix_nodes.c */ - -int fix_nodes(int n_op_mode, struct tree_balance *tb, - struct item_head *ins_ih, const void *); -void unfix_nodes(struct tree_balance *); - -/* prints.c */ -void __reiserfs_panic(struct super_block *s, const char *id, - const char *function, const char *fmt, ...) - __attribute__ ((noreturn)); -#define reiserfs_panic(s, id, fmt, args...) \ - __reiserfs_panic(s, id, __func__, fmt, ##args) -void __reiserfs_error(struct super_block *s, const char *id, - const char *function, const char *fmt, ...); -#define reiserfs_error(s, id, fmt, args...) \ - __reiserfs_error(s, id, __func__, fmt, ##args) -void reiserfs_info(struct super_block *s, const char *fmt, ...); -void reiserfs_debug(struct super_block *s, int level, const char *fmt, ...); -void print_indirect_item(struct buffer_head *bh, int item_num); -void store_print_tb(struct tree_balance *tb); -void print_cur_tb(char *mes); -void print_de(struct reiserfs_dir_entry *de); -void print_bi(struct buffer_info *bi, char *mes); -#define PRINT_LEAF_ITEMS 1 /* print all items */ -#define PRINT_DIRECTORY_ITEMS 2 /* print directory items */ -#define PRINT_DIRECT_ITEMS 4 /* print contents of direct items */ -void print_block(struct buffer_head *bh, ...); -void print_bmap(struct super_block *s, int silent); -void print_bmap_block(int i, char *data, int size, int silent); -/*void print_super_block (struct super_block * s, char * mes);*/ -void print_objectid_map(struct super_block *s); -void print_block_head(struct buffer_head *bh, char *mes); -void check_leaf(struct buffer_head *bh); -void check_internal(struct buffer_head *bh); -void print_statistics(struct super_block *s); -char *reiserfs_hashname(int code); - -/* lbalance.c */ -int leaf_move_items(int shift_mode, struct tree_balance *tb, int mov_num, - int mov_bytes, struct buffer_head *Snew); -int leaf_shift_left(struct tree_balance *tb, int shift_num, int shift_bytes); -int leaf_shift_right(struct tree_balance *tb, int shift_num, int shift_bytes); -void leaf_delete_items(struct buffer_info *cur_bi, int last_first, int first, - int del_num, int del_bytes); -void leaf_insert_into_buf(struct buffer_info *bi, int before, - struct item_head *inserted_item_ih, - const char *inserted_item_body, int zeros_number); -void leaf_paste_in_buffer(struct buffer_info *bi, int pasted_item_num, - int pos_in_item, int paste_size, const char *body, - int zeros_number); -void leaf_cut_from_buffer(struct buffer_info *bi, int cut_item_num, - int pos_in_item, int cut_size); -void leaf_paste_entries(struct buffer_info *bi, int item_num, int before, - int new_entry_count, struct reiserfs_de_head *new_dehs, - const char *records, int paste_size); -/* ibalance.c */ -int balance_internal(struct tree_balance *, int, int, struct item_head *, - struct buffer_head **); - -/* do_balance.c */ -void do_balance_mark_leaf_dirty(struct tree_balance *tb, - struct buffer_head *bh, int flag); -#define do_balance_mark_internal_dirty do_balance_mark_leaf_dirty -#define do_balance_mark_sb_dirty do_balance_mark_leaf_dirty - -void do_balance(struct tree_balance *tb, struct item_head *ih, - const char *body, int flag); -void reiserfs_invalidate_buffer(struct tree_balance *tb, - struct buffer_head *bh); - -int get_left_neighbor_position(struct tree_balance *tb, int h); -int get_right_neighbor_position(struct tree_balance *tb, int h); -void replace_key(struct tree_balance *tb, struct buffer_head *, int, - struct buffer_head *, int); -void make_empty_node(struct buffer_info *); -struct buffer_head *get_FEB(struct tree_balance *); - -/* bitmap.c */ - -/* structure contains hints for block allocator, and it is a container for - * arguments, such as node, search path, transaction_handle, etc. */ -struct __reiserfs_blocknr_hint { - struct inode *inode; /* inode passed to allocator, if we allocate unf. nodes */ - sector_t block; /* file offset, in blocks */ - struct in_core_key key; - struct treepath *path; /* search path, used by allocator to deternine search_start by - * various ways */ - struct reiserfs_transaction_handle *th; /* transaction handle is needed to log super blocks and - * bitmap blocks changes */ - b_blocknr_t beg, end; - b_blocknr_t search_start; /* a field used to transfer search start value (block number) - * between different block allocator procedures - * (determine_search_start() and others) */ - int prealloc_size; /* is set in determine_prealloc_size() function, used by underlayed - * function that do actual allocation */ - - unsigned formatted_node:1; /* the allocator uses different polices for getting disk space for - * formatted/unformatted blocks with/without preallocation */ - unsigned preallocate:1; -}; - -typedef struct __reiserfs_blocknr_hint reiserfs_blocknr_hint_t; - -int reiserfs_parse_alloc_options(struct super_block *, char *); -void reiserfs_init_alloc_options(struct super_block *s); - -/* - * given a directory, this will tell you what packing locality - * to use for a new object underneat it. The locality is returned - * in disk byte order (le). - */ -__le32 reiserfs_choose_packing(struct inode *dir); - -int reiserfs_init_bitmap_cache(struct super_block *sb); -void reiserfs_free_bitmap_cache(struct super_block *sb); -void reiserfs_cache_bitmap_metadata(struct super_block *sb, struct buffer_head *bh, struct reiserfs_bitmap_info *info); -struct buffer_head *reiserfs_read_bitmap_block(struct super_block *sb, unsigned int bitmap); -int is_reusable(struct super_block *s, b_blocknr_t block, int bit_value); -void reiserfs_free_block(struct reiserfs_transaction_handle *th, struct inode *, - b_blocknr_t, int for_unformatted); -int reiserfs_allocate_blocknrs(reiserfs_blocknr_hint_t *, b_blocknr_t *, int, - int); -static inline int reiserfs_new_form_blocknrs(struct tree_balance *tb, - b_blocknr_t * new_blocknrs, - int amount_needed) -{ - reiserfs_blocknr_hint_t hint = { - .th = tb->transaction_handle, - .path = tb->tb_path, - .inode = NULL, - .key = tb->key, - .block = 0, - .formatted_node = 1 - }; - return reiserfs_allocate_blocknrs(&hint, new_blocknrs, amount_needed, - 0); -} - -static inline int reiserfs_new_unf_blocknrs(struct reiserfs_transaction_handle - *th, struct inode *inode, - b_blocknr_t * new_blocknrs, - struct treepath *path, - sector_t block) -{ - reiserfs_blocknr_hint_t hint = { - .th = th, - .path = path, - .inode = inode, - .block = block, - .formatted_node = 0, - .preallocate = 0 - }; - return reiserfs_allocate_blocknrs(&hint, new_blocknrs, 1, 0); -} - -#ifdef REISERFS_PREALLOCATE -static inline int reiserfs_new_unf_blocknrs2(struct reiserfs_transaction_handle - *th, struct inode *inode, - b_blocknr_t * new_blocknrs, - struct treepath *path, - sector_t block) -{ - reiserfs_blocknr_hint_t hint = { - .th = th, - .path = path, - .inode = inode, - .block = block, - .formatted_node = 0, - .preallocate = 1 - }; - return reiserfs_allocate_blocknrs(&hint, new_blocknrs, 1, 0); -} - -void reiserfs_discard_prealloc(struct reiserfs_transaction_handle *th, - struct inode *inode); -void reiserfs_discard_all_prealloc(struct reiserfs_transaction_handle *th); -#endif - -/* hashes.c */ -__u32 keyed_hash(const signed char *msg, int len); -__u32 yura_hash(const signed char *msg, int len); -__u32 r5_hash(const signed char *msg, int len); - -#define reiserfs_set_le_bit __set_bit_le -#define reiserfs_test_and_set_le_bit __test_and_set_bit_le -#define reiserfs_clear_le_bit __clear_bit_le -#define reiserfs_test_and_clear_le_bit __test_and_clear_bit_le -#define reiserfs_test_le_bit test_bit_le -#define reiserfs_find_next_zero_le_bit find_next_zero_bit_le - -/* sometimes reiserfs_truncate may require to allocate few new blocks - to perform indirect2direct conversion. People probably used to - think, that truncate should work without problems on a filesystem - without free disk space. They may complain that they can not - truncate due to lack of free disk space. This spare space allows us - to not worry about it. 500 is probably too much, but it should be - absolutely safe */ -#define SPARE_SPACE 500 - -/* prototypes from ioctl.c */ -long reiserfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg); -long reiserfs_compat_ioctl(struct file *filp, - unsigned int cmd, unsigned long arg); -int reiserfs_unpack(struct inode *inode, struct file *filp); - -#endif /* __KERNEL__ */ - #endif /* _LINUX_REISER_FS_H */ |