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-rw-r--r--fs/ext4/balloc.c4
-rw-r--r--fs/ext4/dir.c27
-rw-r--r--fs/ext4/ext4.h65
-rw-r--r--fs/ext4/ext4_jbd2.h12
-rw-r--r--fs/ext4/extents.c4
-rw-r--r--fs/ext4/extents_status.c1
-rw-r--r--fs/ext4/file.c4
-rw-r--r--fs/ext4/indirect.c22
-rw-r--r--fs/ext4/inline.c21
-rw-r--r--fs/ext4/inode.c130
-rw-r--r--fs/ext4/ioctl.c99
-rw-r--r--fs/ext4/mballoc.c5
-rw-r--r--fs/ext4/move_extent.c15
-rw-r--r--fs/ext4/namei.c213
-rw-r--r--fs/ext4/page-io.c44
-rw-r--r--fs/ext4/sysfs.c6
16 files changed, 404 insertions, 268 deletions
diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c
index e5d6ee61ff48..0b202e00d93f 100644
--- a/fs/ext4/balloc.c
+++ b/fs/ext4/balloc.c
@@ -603,9 +603,9 @@ int ext4_claim_free_clusters(struct ext4_sb_info *sbi,
}
/**
- * ext4_should_retry_alloc()
+ * ext4_should_retry_alloc() - check if a block allocation should be retried
* @sb: super block
- * @retries number of attemps has been made
+ * @retries: number of attemps has been made
*
* ext4_should_retry_alloc() is called when ENOSPC is returned, and if
* it is profitable to retry the operation, this function will wait
diff --git a/fs/ext4/dir.c b/fs/ext4/dir.c
index c7843b149a1e..86054f31fe4d 100644
--- a/fs/ext4/dir.c
+++ b/fs/ext4/dir.c
@@ -33,6 +33,9 @@
static int ext4_dx_readdir(struct file *, struct dir_context *);
/**
+ * is_dx_dir() - check if a directory is using htree indexing
+ * @inode: directory inode
+ *
* Check if the given dir-inode refers to an htree-indexed directory
* (or a directory which could potentially get converted to use htree
* indexing).
@@ -109,7 +112,6 @@ static int ext4_readdir(struct file *file, struct dir_context *ctx)
struct inode *inode = file_inode(file);
struct super_block *sb = inode->i_sb;
struct buffer_head *bh = NULL;
- int dir_has_error = 0;
struct fscrypt_str fstr = FSTR_INIT(NULL, 0);
if (IS_ENCRYPTED(inode)) {
@@ -145,8 +147,6 @@ static int ext4_readdir(struct file *file, struct dir_context *ctx)
return err;
}
- offset = ctx->pos & (sb->s_blocksize - 1);
-
while (ctx->pos < inode->i_size) {
struct ext4_map_blocks map;
@@ -155,9 +155,18 @@ static int ext4_readdir(struct file *file, struct dir_context *ctx)
goto errout;
}
cond_resched();
+ offset = ctx->pos & (sb->s_blocksize - 1);
map.m_lblk = ctx->pos >> EXT4_BLOCK_SIZE_BITS(sb);
map.m_len = 1;
err = ext4_map_blocks(NULL, inode, &map, 0);
+ if (err == 0) {
+ /* m_len should never be zero but let's avoid
+ * an infinite loop if it somehow is */
+ if (map.m_len == 0)
+ map.m_len = 1;
+ ctx->pos += map.m_len * sb->s_blocksize;
+ continue;
+ }
if (err > 0) {
pgoff_t index = map.m_pblk >>
(PAGE_SHIFT - inode->i_blkbits);
@@ -176,13 +185,6 @@ static int ext4_readdir(struct file *file, struct dir_context *ctx)
}
if (!bh) {
- if (!dir_has_error) {
- EXT4_ERROR_FILE(file, 0,
- "directory contains a "
- "hole at offset %llu",
- (unsigned long long) ctx->pos);
- dir_has_error = 1;
- }
/* corrupt size? Maybe no more blocks to read */
if (ctx->pos > inode->i_blocks << 9)
break;
@@ -192,8 +194,7 @@ static int ext4_readdir(struct file *file, struct dir_context *ctx)
/* Check the checksum */
if (!buffer_verified(bh) &&
- !ext4_dirent_csum_verify(inode,
- (struct ext4_dir_entry *)bh->b_data)) {
+ !ext4_dirblock_csum_verify(inode, bh)) {
EXT4_ERROR_FILE(file, 0, "directory fails checksum "
"at offset %llu",
(unsigned long long)ctx->pos);
@@ -674,7 +675,7 @@ static int ext4_d_compare(const struct dentry *dentry, unsigned int len,
return memcmp(str, name->name, len);
}
- return ext4_ci_compare(dentry->d_parent->d_inode, name, &qstr);
+ return ext4_ci_compare(dentry->d_parent->d_inode, name, &qstr, false);
}
static int ext4_d_hash(const struct dentry *dentry, struct qstr *str)
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 1cb67859e051..bf660aa7a9e0 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -421,7 +421,8 @@ struct flex_groups {
EXT4_PROJINHERIT_FL | EXT4_CASEFOLD_FL)
/* Flags that are appropriate for regular files (all but dir-specific ones). */
-#define EXT4_REG_FLMASK (~(EXT4_DIRSYNC_FL | EXT4_TOPDIR_FL | EXT4_CASEFOLD_FL))
+#define EXT4_REG_FLMASK (~(EXT4_DIRSYNC_FL | EXT4_TOPDIR_FL | EXT4_CASEFOLD_FL |\
+ EXT4_PROJINHERIT_FL))
/* Flags that are appropriate for non-directories/regular files. */
#define EXT4_OTHER_FLMASK (EXT4_NODUMP_FL | EXT4_NOATIME_FL)
@@ -2077,6 +2078,9 @@ struct ext4_filename {
#ifdef CONFIG_FS_ENCRYPTION
struct fscrypt_str crypto_buf;
#endif
+#ifdef CONFIG_UNICODE
+ struct fscrypt_str cf_name;
+#endif
};
#define fname_name(p) ((p)->disk_name.name)
@@ -2302,6 +2306,12 @@ extern unsigned ext4_free_clusters_after_init(struct super_block *sb,
struct ext4_group_desc *gdp);
ext4_fsblk_t ext4_inode_to_goal_block(struct inode *);
+#ifdef CONFIG_UNICODE
+extern void ext4_fname_setup_ci_filename(struct inode *dir,
+ const struct qstr *iname,
+ struct fscrypt_str *fname);
+#endif
+
#ifdef CONFIG_FS_ENCRYPTION
static inline void ext4_fname_from_fscrypt_name(struct ext4_filename *dst,
const struct fscrypt_name *src)
@@ -2328,6 +2338,10 @@ static inline int ext4_fname_setup_filename(struct inode *dir,
return err;
ext4_fname_from_fscrypt_name(fname, &name);
+
+#ifdef CONFIG_UNICODE
+ ext4_fname_setup_ci_filename(dir, iname, &fname->cf_name);
+#endif
return 0;
}
@@ -2343,6 +2357,10 @@ static inline int ext4_fname_prepare_lookup(struct inode *dir,
return err;
ext4_fname_from_fscrypt_name(fname, &name);
+
+#ifdef CONFIG_UNICODE
+ ext4_fname_setup_ci_filename(dir, &dentry->d_name, &fname->cf_name);
+#endif
return 0;
}
@@ -2356,6 +2374,11 @@ static inline void ext4_fname_free_filename(struct ext4_filename *fname)
fname->crypto_buf.name = NULL;
fname->usr_fname = NULL;
fname->disk_name.name = NULL;
+
+#ifdef CONFIG_UNICODE
+ kfree(fname->cf_name.name);
+ fname->cf_name.name = NULL;
+#endif
}
#else /* !CONFIG_FS_ENCRYPTION */
static inline int ext4_fname_setup_filename(struct inode *dir,
@@ -2366,6 +2389,11 @@ static inline int ext4_fname_setup_filename(struct inode *dir,
fname->usr_fname = iname;
fname->disk_name.name = (unsigned char *) iname->name;
fname->disk_name.len = iname->len;
+
+#ifdef CONFIG_UNICODE
+ ext4_fname_setup_ci_filename(dir, iname, &fname->cf_name);
+#endif
+
return 0;
}
@@ -2376,7 +2404,13 @@ static inline int ext4_fname_prepare_lookup(struct inode *dir,
return ext4_fname_setup_filename(dir, &dentry->d_name, 1, fname);
}
-static inline void ext4_fname_free_filename(struct ext4_filename *fname) { }
+static inline void ext4_fname_free_filename(struct ext4_filename *fname)
+{
+#ifdef CONFIG_UNICODE
+ kfree(fname->cf_name.name);
+ fname->cf_name.name = NULL;
+#endif
+}
#endif /* !CONFIG_FS_ENCRYPTION */
/* dir.c */
@@ -2568,8 +2602,8 @@ extern int ext4_ext_migrate(struct inode *);
extern int ext4_ind_migrate(struct inode *inode);
/* namei.c */
-extern int ext4_dirent_csum_verify(struct inode *inode,
- struct ext4_dir_entry *dirent);
+extern int ext4_dirblock_csum_verify(struct inode *inode,
+ struct buffer_head *bh);
extern int ext4_orphan_add(handle_t *, struct inode *);
extern int ext4_orphan_del(handle_t *, struct inode *);
extern int ext4_htree_fill_tree(struct file *dir_file, __u32 start_hash,
@@ -3070,11 +3104,11 @@ extern int ext4_try_create_inline_dir(handle_t *handle,
extern int ext4_read_inline_dir(struct file *filp,
struct dir_context *ctx,
int *has_inline_data);
-extern int htree_inlinedir_to_tree(struct file *dir_file,
- struct inode *dir, ext4_lblk_t block,
- struct dx_hash_info *hinfo,
- __u32 start_hash, __u32 start_minor_hash,
- int *has_inline_data);
+extern int ext4_inlinedir_to_tree(struct file *dir_file,
+ struct inode *dir, ext4_lblk_t block,
+ struct dx_hash_info *hinfo,
+ __u32 start_hash, __u32 start_minor_hash,
+ int *has_inline_data);
extern struct buffer_head *ext4_find_inline_entry(struct inode *dir,
struct ext4_filename *fname,
struct ext4_dir_entry_2 **res_dir,
@@ -3113,14 +3147,13 @@ extern struct ext4_dir_entry_2 *ext4_init_dot_dotdot(struct inode *inode,
struct ext4_dir_entry_2 *de,
int blocksize, int csum_size,
unsigned int parent_ino, int dotdot_real_len);
-extern void initialize_dirent_tail(struct ext4_dir_entry_tail *t,
- unsigned int blocksize);
-extern int ext4_handle_dirty_dirent_node(handle_t *handle,
- struct inode *inode,
- struct buffer_head *bh);
+extern void ext4_initialize_dirent_tail(struct buffer_head *bh,
+ unsigned int blocksize);
+extern int ext4_handle_dirty_dirblock(handle_t *handle, struct inode *inode,
+ struct buffer_head *bh);
extern int ext4_ci_compare(const struct inode *parent,
- const struct qstr *name,
- const struct qstr *entry);
+ const struct qstr *fname,
+ const struct qstr *entry, bool quick);
#define S_SHIFT 12
static const unsigned char ext4_type_by_mode[(S_IFMT >> S_SHIFT) + 1] = {
diff --git a/fs/ext4/ext4_jbd2.h b/fs/ext4/ext4_jbd2.h
index 75a5309f2231..ef8fcf7d0d3b 100644
--- a/fs/ext4/ext4_jbd2.h
+++ b/fs/ext4/ext4_jbd2.h
@@ -361,20 +361,20 @@ static inline int ext4_journal_force_commit(journal_t *journal)
}
static inline int ext4_jbd2_inode_add_write(handle_t *handle,
- struct inode *inode)
+ struct inode *inode, loff_t start_byte, loff_t length)
{
if (ext4_handle_valid(handle))
- return jbd2_journal_inode_add_write(handle,
- EXT4_I(inode)->jinode);
+ return jbd2_journal_inode_ranged_write(handle,
+ EXT4_I(inode)->jinode, start_byte, length);
return 0;
}
static inline int ext4_jbd2_inode_add_wait(handle_t *handle,
- struct inode *inode)
+ struct inode *inode, loff_t start_byte, loff_t length)
{
if (ext4_handle_valid(handle))
- return jbd2_journal_inode_add_wait(handle,
- EXT4_I(inode)->jinode);
+ return jbd2_journal_inode_ranged_wait(handle,
+ EXT4_I(inode)->jinode, start_byte, length);
return 0;
}
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index d40ed940001e..92266a2da7d6 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -5676,8 +5676,8 @@ out_mutex:
}
/**
- * ext4_swap_extents - Swap extents between two inodes
- *
+ * ext4_swap_extents() - Swap extents between two inodes
+ * @handle: handle for this transaction
* @inode1: First inode
* @inode2: Second inode
* @lblk1: Start block for first inode
diff --git a/fs/ext4/extents_status.c b/fs/ext4/extents_status.c
index 023a3eb3afa3..7521de2dcf3a 100644
--- a/fs/ext4/extents_status.c
+++ b/fs/ext4/extents_status.c
@@ -1317,7 +1317,6 @@ static int es_do_reclaim_extents(struct ext4_inode_info *ei, ext4_lblk_t end,
es = __es_tree_search(&tree->root, ei->i_es_shrink_lblk);
if (!es)
goto out_wrap;
- node = &es->rb_node;
while (*nr_to_scan > 0) {
if (es->es_lblk > end) {
ei->i_es_shrink_lblk = end + 1;
diff --git a/fs/ext4/file.c b/fs/ext4/file.c
index 2c5baa5e8291..f4a24a46245e 100644
--- a/fs/ext4/file.c
+++ b/fs/ext4/file.c
@@ -165,6 +165,10 @@ static ssize_t ext4_write_checks(struct kiocb *iocb, struct iov_iter *from)
ret = generic_write_checks(iocb, from);
if (ret <= 0)
return ret;
+
+ if (unlikely(IS_IMMUTABLE(inode)))
+ return -EPERM;
+
/*
* If we have encountered a bitmap-format file, the size limit
* is smaller than s_maxbytes, which is for extent-mapped files.
diff --git a/fs/ext4/indirect.c b/fs/ext4/indirect.c
index 2024d3fa5504..36699a131168 100644
--- a/fs/ext4/indirect.c
+++ b/fs/ext4/indirect.c
@@ -294,14 +294,12 @@ static int ext4_blks_to_allocate(Indirect *branch, int k, unsigned int blks,
}
/**
- * ext4_alloc_branch - allocate and set up a chain of blocks.
- * @handle: handle for this transaction
- * @inode: owner
- * @indirect_blks: number of allocated indirect blocks
- * @blks: number of allocated direct blocks
- * @goal: preferred place for allocation
- * @offsets: offsets (in the blocks) to store the pointers to next.
- * @branch: place to store the chain in.
+ * ext4_alloc_branch() - allocate and set up a chain of blocks
+ * @handle: handle for this transaction
+ * @ar: structure describing the allocation request
+ * @indirect_blks: number of allocated indirect blocks
+ * @offsets: offsets (in the blocks) to store the pointers to next.
+ * @branch: place to store the chain in.
*
* This function allocates blocks, zeroes out all but the last one,
* links them into chain and (if we are synchronous) writes them to disk.
@@ -396,15 +394,11 @@ failed:
}
/**
- * ext4_splice_branch - splice the allocated branch onto inode.
+ * ext4_splice_branch() - splice the allocated branch onto inode.
* @handle: handle for this transaction
- * @inode: owner
- * @block: (logical) number of block we are adding
- * @chain: chain of indirect blocks (with a missing link - see
- * ext4_alloc_branch)
+ * @ar: structure describing the allocation request
* @where: location of missing link
* @num: number of indirect blocks we are adding
- * @blks: number of direct blocks we are adding
*
* This function fills the missing link and does all housekeeping needed in
* inode (->i_blocks, etc.). In case of success we end up with the full
diff --git a/fs/ext4/inline.c b/fs/ext4/inline.c
index f73bc3925282..88cdf3c90bd1 100644
--- a/fs/ext4/inline.c
+++ b/fs/ext4/inline.c
@@ -1132,7 +1132,6 @@ static int ext4_finish_convert_inline_dir(handle_t *handle,
{
int err, csum_size = 0, header_size = 0;
struct ext4_dir_entry_2 *de;
- struct ext4_dir_entry_tail *t;
void *target = dir_block->b_data;
/*
@@ -1158,13 +1157,11 @@ static int ext4_finish_convert_inline_dir(handle_t *handle,
inline_size - EXT4_INLINE_DOTDOT_SIZE + header_size,
inode->i_sb->s_blocksize - csum_size);
- if (csum_size) {
- t = EXT4_DIRENT_TAIL(dir_block->b_data,
- inode->i_sb->s_blocksize);
- initialize_dirent_tail(t, inode->i_sb->s_blocksize);
- }
+ if (csum_size)
+ ext4_initialize_dirent_tail(dir_block,
+ inode->i_sb->s_blocksize);
set_buffer_uptodate(dir_block);
- err = ext4_handle_dirty_dirent_node(handle, inode, dir_block);
+ err = ext4_handle_dirty_dirblock(handle, inode, dir_block);
if (err)
return err;
set_buffer_verified(dir_block);
@@ -1327,11 +1324,11 @@ out:
* inlined dir. It returns the number directory entries loaded
* into the tree. If there is an error it is returned in err.
*/
-int htree_inlinedir_to_tree(struct file *dir_file,
- struct inode *dir, ext4_lblk_t block,
- struct dx_hash_info *hinfo,
- __u32 start_hash, __u32 start_minor_hash,
- int *has_inline_data)
+int ext4_inlinedir_to_tree(struct file *dir_file,
+ struct inode *dir, ext4_lblk_t block,
+ struct dx_hash_info *hinfo,
+ __u32 start_hash, __u32 start_minor_hash,
+ int *has_inline_data)
{
int err = 0, count = 0;
unsigned int parent_ino;
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index c7f77c643008..420fe3deed39 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -731,10 +731,16 @@ out_sem:
!(flags & EXT4_GET_BLOCKS_ZERO) &&
!ext4_is_quota_file(inode) &&
ext4_should_order_data(inode)) {
+ loff_t start_byte =
+ (loff_t)map->m_lblk << inode->i_blkbits;
+ loff_t length = (loff_t)map->m_len << inode->i_blkbits;
+
if (flags & EXT4_GET_BLOCKS_IO_SUBMIT)
- ret = ext4_jbd2_inode_add_wait(handle, inode);
+ ret = ext4_jbd2_inode_add_wait(handle, inode,
+ start_byte, length);
else
- ret = ext4_jbd2_inode_add_write(handle, inode);
+ ret = ext4_jbd2_inode_add_write(handle, inode,
+ start_byte, length);
if (ret)
return ret;
}
@@ -1164,8 +1170,9 @@ static int ext4_block_write_begin(struct page *page, loff_t pos, unsigned len,
int err = 0;
unsigned blocksize = inode->i_sb->s_blocksize;
unsigned bbits;
- struct buffer_head *bh, *head, *wait[2], **wait_bh = wait;
- bool decrypt = false;
+ struct buffer_head *bh, *head, *wait[2];
+ int nr_wait = 0;
+ int i;
BUG_ON(!PageLocked(page));
BUG_ON(from > PAGE_SIZE);
@@ -1217,23 +1224,32 @@ static int ext4_block_write_begin(struct page *page, loff_t pos, unsigned len,
!buffer_unwritten(bh) &&
(block_start < from || block_end > to)) {
ll_rw_block(REQ_OP_READ, 0, 1, &bh);
- *wait_bh++ = bh;
- decrypt = IS_ENCRYPTED(inode) && S_ISREG(inode->i_mode);
+ wait[nr_wait++] = bh;
}
}
/*
* If we issued read requests, let them complete.
*/
- while (wait_bh > wait) {
- wait_on_buffer(*--wait_bh);
- if (!buffer_uptodate(*wait_bh))
+ for (i = 0; i < nr_wait; i++) {
+ wait_on_buffer(wait[i]);
+ if (!buffer_uptodate(wait[i]))
err = -EIO;
}
- if (unlikely(err))
+ if (unlikely(err)) {
page_zero_new_buffers(page, from, to);
- else if (decrypt)
- err = fscrypt_decrypt_page(page->mapping->host, page,
- PAGE_SIZE, 0, page->index);
+ } else if (IS_ENCRYPTED(inode) && S_ISREG(inode->i_mode)) {
+ for (i = 0; i < nr_wait; i++) {
+ int err2;
+
+ err2 = fscrypt_decrypt_pagecache_blocks(page, blocksize,
+ bh_offset(wait[i]));
+ if (err2) {
+ clear_buffer_uptodate(wait[i]);
+ err = err2;
+ }
+ }
+ }
+
return err;
}
#endif
@@ -4065,9 +4081,8 @@ static int __ext4_block_zero_page_range(handle_t *handle,
if (S_ISREG(inode->i_mode) && IS_ENCRYPTED(inode)) {
/* We expect the key to be set. */
BUG_ON(!fscrypt_has_encryption_key(inode));
- BUG_ON(blocksize != PAGE_SIZE);
- WARN_ON_ONCE(fscrypt_decrypt_page(page->mapping->host,
- page, PAGE_SIZE, 0, page->index));
+ WARN_ON_ONCE(fscrypt_decrypt_pagecache_blocks(
+ page, blocksize, bh_offset(bh)));
}
}
if (ext4_should_journal_data(inode)) {
@@ -4085,7 +4100,8 @@ static int __ext4_block_zero_page_range(handle_t *handle,
err = 0;
mark_buffer_dirty(bh);
if (ext4_should_order_data(inode))
- err = ext4_jbd2_inode_add_write(handle, inode);
+ err = ext4_jbd2_inode_add_write(handle, inode, from,
+ length);
}
unlock:
@@ -4570,6 +4586,7 @@ static int __ext4_get_inode_loc(struct inode *inode,
struct buffer_head *bh;
struct super_block *sb = inode->i_sb;
ext4_fsblk_t block;
+ struct blk_plug plug;
int inodes_per_block, inode_offset;
iloc->bh = NULL;
@@ -4658,6 +4675,7 @@ make_io:
* If we need to do any I/O, try to pre-readahead extra
* blocks from the inode table.
*/
+ blk_start_plug(&plug);
if (EXT4_SB(sb)->s_inode_readahead_blks) {
ext4_fsblk_t b, end, table;
unsigned num;
@@ -4688,6 +4706,7 @@ make_io:
get_bh(bh);
bh->b_end_io = end_buffer_read_sync;
submit_bh(REQ_OP_READ, REQ_META | REQ_PRIO, bh);
+ blk_finish_plug(&plug);
wait_on_buffer(bh);
if (!buffer_uptodate(bh)) {
EXT4_ERROR_INODE_BLOCK(inode, block,
@@ -5520,6 +5539,14 @@ int ext4_setattr(struct dentry *dentry, struct iattr *attr)
if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb))))
return -EIO;
+ if (unlikely(IS_IMMUTABLE(inode)))
+ return -EPERM;
+
+ if (unlikely(IS_APPEND(inode) &&
+ (ia_valid & (ATTR_MODE | ATTR_UID |
+ ATTR_GID | ATTR_TIMES_SET))))
+ return -EPERM;
+
error = setattr_prepare(dentry, attr);
if (error)
return error;
@@ -5571,7 +5598,7 @@ int ext4_setattr(struct dentry *dentry, struct iattr *attr)
if (attr->ia_valid & ATTR_SIZE) {
handle_t *handle;
loff_t oldsize = inode->i_size;
- int shrink = (attr->ia_size <= inode->i_size);
+ int shrink = (attr->ia_size < inode->i_size);
if (!(ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS))) {
struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
@@ -5585,18 +5612,33 @@ int ext4_setattr(struct dentry *dentry, struct iattr *attr)
if (IS_I_VERSION(inode) && attr->ia_size != inode->i_size)
inode_inc_iversion(inode);
- if (ext4_should_order_data(inode) &&
- (attr->ia_size < inode->i_size)) {
- error = ext4_begin_ordered_truncate(inode,
+ if (shrink) {
+ if (ext4_should_order_data(inode)) {
+ error = ext4_begin_ordered_truncate(inode,
attr->ia_size);
- if (error)
- goto err_out;
+ if (error)
+ goto err_out;
+ }
+ /*
+ * Blocks are going to be removed from the inode. Wait
+ * for dio in flight.
+ */
+ inode_dio_wait(inode);
+ }
+
+ down_write(&EXT4_I(inode)->i_mmap_sem);
+
+ rc = ext4_break_layouts(inode);
+ if (rc) {
+ up_write(&EXT4_I(inode)->i_mmap_sem);
+ return rc;
}
+
if (attr->ia_size != inode->i_size) {
handle = ext4_journal_start(inode, EXT4_HT_INODE, 3);
if (IS_ERR(handle)) {
error = PTR_ERR(handle);
- goto err_out;
+ goto out_mmap_sem;
}
if (ext4_handle_valid(handle) && shrink) {
error = ext4_orphan_add(handle, inode);
@@ -5624,42 +5666,31 @@ int ext4_setattr(struct dentry *dentry, struct iattr *attr)
i_size_write(inode, attr->ia_size);
up_write(&EXT4_I(inode)->i_data_sem);
ext4_journal_stop(handle);
- if (error) {
- if (orphan && inode->i_nlink)
- ext4_orphan_del(NULL, inode);
- goto err_out;
+ if (error)
+ goto out_mmap_sem;
+ if (!shrink) {
+ pagecache_isize_extended(inode, oldsize,
+ inode->i_size);
+ } else if (ext4_should_journal_data(inode)) {
+ ext4_wait_for_tail_page_commit(inode);
}
}
- if (!shrink) {
- pagecache_isize_extended(inode, oldsize, inode->i_size);
- } else {
- /*
- * Blocks are going to be removed from the inode. Wait
- * for dio in flight.
- */
- inode_dio_wait(inode);
- }
- if (orphan && ext4_should_journal_data(inode))
- ext4_wait_for_tail_page_commit(inode);
- down_write(&EXT4_I(inode)->i_mmap_sem);
-
- rc = ext4_break_layouts(inode);
- if (rc) {
- up_write(&EXT4_I(inode)->i_mmap_sem);
- error = rc;
- goto err_out;
- }
/*
* Truncate pagecache after we've waited for commit
* in data=journal mode to make pages freeable.
*/
truncate_pagecache(inode, inode->i_size);
- if (shrink) {
+ /*
+ * Call ext4_truncate() even if i_size didn't change to
+ * truncate possible preallocated blocks.
+ */
+ if (attr->ia_size <= oldsize) {
rc = ext4_truncate(inode);
if (rc)
error = rc;
}
+out_mmap_sem:
up_write(&EXT4_I(inode)->i_mmap_sem);
}
@@ -6190,6 +6221,9 @@ vm_fault_t ext4_page_mkwrite(struct vm_fault *vmf)
get_block_t *get_block;
int retries = 0;
+ if (unlikely(IS_IMMUTABLE(inode)))
+ return VM_FAULT_SIGBUS;
+
sb_start_pagefault(inode->i_sb);
file_update_time(vma->vm_file);
diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c
index e486e49b31ed..442f7ef873fc 100644
--- a/fs/ext4/ioctl.c
+++ b/fs/ext4/ioctl.c
@@ -269,6 +269,29 @@ static int uuid_is_zero(__u8 u[16])
}
#endif
+/*
+ * If immutable is set and we are not clearing it, we're not allowed to change
+ * anything else in the inode. Don't error out if we're only trying to set
+ * immutable on an immutable file.
+ */
+static int ext4_ioctl_check_immutable(struct inode *inode, __u32 new_projid,
+ unsigned int flags)
+{
+ struct ext4_inode_info *ei = EXT4_I(inode);
+ unsigned int oldflags = ei->i_flags;
+
+ if (!(oldflags & EXT4_IMMUTABLE_FL) || !(flags & EXT4_IMMUTABLE_FL))
+ return 0;
+
+ if ((oldflags & ~EXT4_IMMUTABLE_FL) != (flags & ~EXT4_IMMUTABLE_FL))
+ return -EPERM;
+ if (ext4_has_feature_project(inode->i_sb) &&
+ __kprojid_val(ei->i_projid) != new_projid)
+ return -EPERM;
+
+ return 0;
+}
+
static int ext4_ioctl_setflags(struct inode *inode,
unsigned int flags)
{
@@ -289,16 +312,9 @@ static int ext4_ioctl_setflags(struct inode *inode,
/* The JOURNAL_DATA flag is modifiable only by root */
jflag = flags & EXT4_JOURNAL_DATA_FL;
- /*
- * The IMMUTABLE and APPEND_ONLY flags can only be changed by
- * the relevant capability.
- *
- * This test looks nicer. Thanks to Pauline Middelink
- */
- if ((flags ^ oldflags) & (EXT4_APPEND_FL | EXT4_IMMUTABLE_FL)) {
- if (!capable(CAP_LINUX_IMMUTABLE))
- goto flags_out;
- }
+ err = vfs_ioc_setflags_prepare(inode, oldflags, flags);
+ if (err)
+ goto flags_out;
/*
* The JOURNAL_DATA flag can only be changed by
@@ -340,6 +356,20 @@ static int ext4_ioctl_setflags(struct inode *inode,
}
}
+ /*
+ * Wait for all pending directio and then flush all the dirty pages
+ * for this file. The flush marks all the pages readonly, so any
+ * subsequent attempt to write to the file (particularly mmap pages)
+ * will come through the filesystem and fail.
+ */
+ if (S_ISREG(inode->i_mode) && !IS_IMMUTABLE(inode) &&
+ (flags & EXT4_IMMUTABLE_FL)) {
+ inode_dio_wait(inode);
+ err = filemap_write_and_wait(inode->i_mapping);
+ if (err)
+ goto flags_out;
+ }
+
handle = ext4_journal_start(inode, EXT4_HT_INODE, 1);
if (IS_ERR(handle)) {
err = PTR_ERR(handle);
@@ -704,28 +734,15 @@ group_add_out:
return err;
}
-static int ext4_ioctl_check_project(struct inode *inode, struct fsxattr *fa)
+static void ext4_fill_fsxattr(struct inode *inode, struct fsxattr *fa)
{
- /*
- * Project Quota ID state is only allowed to change from within the init
- * namespace. Enforce that restriction only if we are trying to change
- * the quota ID state. Everything else is allowed in user namespaces.
- */
- if (current_user_ns() == &init_user_ns)
- return 0;
-
- if (__kprojid_val(EXT4_I(inode)->i_projid) != fa->fsx_projid)
- return -EINVAL;
+ struct ext4_inode_info *ei = EXT4_I(inode);
- if (ext4_test_inode_flag(inode, EXT4_INODE_PROJINHERIT)) {
- if (!(fa->fsx_xflags & FS_XFLAG_PROJINHERIT))
- return -EINVAL;
- } else {
- if (fa->fsx_xflags & FS_XFLAG_PROJINHERIT)
- return -EINVAL;
- }
+ simple_fill_fsxattr(fa, ext4_iflags_to_xflags(ei->i_flags &
+ EXT4_FL_USER_VISIBLE));
- return 0;
+ if (ext4_has_feature_project(inode->i_sb))
+ fa->fsx_projid = from_kprojid(&init_user_ns, ei->i_projid);
}
long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
@@ -742,6 +759,8 @@ long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
return ext4_ioc_getfsmap(sb, (void __user *)arg);
case EXT4_IOC_GETFLAGS:
flags = ei->i_flags & EXT4_FL_USER_VISIBLE;
+ if (S_ISREG(inode->i_mode))
+ flags &= ~EXT4_PROJINHERIT_FL;
return put_user(flags, (int __user *) arg);
case EXT4_IOC_SETFLAGS: {
int err;
@@ -769,7 +788,11 @@ long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
return err;
inode_lock(inode);
- err = ext4_ioctl_setflags(inode, flags);
+ err = ext4_ioctl_check_immutable(inode,
+ from_kprojid(&init_user_ns, ei->i_projid),
+ flags);
+ if (!err)
+ err = ext4_ioctl_setflags(inode, flags);
inode_unlock(inode);
mnt_drop_write_file(filp);
return err;
@@ -1096,13 +1119,7 @@ resizefs_out:
{
struct fsxattr fa;
- memset(&fa, 0, sizeof(struct fsxattr));
- fa.fsx_xflags = ext4_iflags_to_xflags(ei->i_flags & EXT4_FL_USER_VISIBLE);
-
- if (ext4_has_feature_project(inode->i_sb)) {
- fa.fsx_projid = (__u32)from_kprojid(&init_user_ns,
- EXT4_I(inode)->i_projid);
- }
+ ext4_fill_fsxattr(inode, &fa);
if (copy_to_user((struct fsxattr __user *)arg,
&fa, sizeof(fa)))
@@ -1111,7 +1128,7 @@ resizefs_out:
}
case EXT4_IOC_FSSETXATTR:
{
- struct fsxattr fa;
+ struct fsxattr fa, old_fa;
int err;
if (copy_from_user(&fa, (struct fsxattr __user *)arg,
@@ -1134,11 +1151,15 @@ resizefs_out:
return err;
inode_lock(inode);
- err = ext4_ioctl_check_project(inode, &fa);
+ ext4_fill_fsxattr(inode, &old_fa);
+ err = vfs_ioc_fssetxattr_check(inode, &old_fa, &fa);
if (err)
goto out;
flags = (ei->i_flags & ~EXT4_FL_XFLAG_VISIBLE) |
(flags & EXT4_FL_XFLAG_VISIBLE);
+ err = ext4_ioctl_check_immutable(inode, fa.fsx_projid, flags);
+ if (err)
+ goto out;
err = ext4_ioctl_setflags(inode, flags);
if (err)
goto out;
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 99ba720dbb7a..a3e2767bdf2f 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -4696,8 +4696,9 @@ ext4_mb_free_metadata(handle_t *handle, struct ext4_buddy *e4b,
* ext4_free_blocks() -- Free given blocks and update quota
* @handle: handle for this transaction
* @inode: inode
- * @block: start physical block to free
- * @count: number of blocks to count
+ * @bh: optional buffer of the block to be freed
+ * @block: starting physical block to be freed
+ * @count: number of blocks to be freed
* @flags: flags used by ext4_free_blocks
*/
void ext4_free_blocks(handle_t *handle, struct inode *inode,
diff --git a/fs/ext4/move_extent.c b/fs/ext4/move_extent.c
index 1083a9f3f16a..30ce3dc69378 100644
--- a/fs/ext4/move_extent.c
+++ b/fs/ext4/move_extent.c
@@ -13,11 +13,10 @@
#include "ext4_extents.h"
/**
- * get_ext_path - Find an extent path for designated logical block number.
- *
- * @inode: an inode which is searched
+ * get_ext_path() - Find an extent path for designated logical block number.
+ * @inode: inode to be searched
* @lblock: logical block number to find an extent path
- * @path: pointer to an extent path pointer (for output)
+ * @ppath: pointer to an extent path pointer (for output)
*
* ext4_find_extent wrapper. Return 0 on success, or a negative error value
* on failure.
@@ -42,8 +41,9 @@ get_ext_path(struct inode *inode, ext4_lblk_t lblock,
}
/**
- * ext4_double_down_write_data_sem - Acquire two inodes' write lock
- * of i_data_sem
+ * ext4_double_down_write_data_sem() - write lock two inodes's i_data_sem
+ * @first: inode to be locked
+ * @second: inode to be locked
*
* Acquire write lock of i_data_sem of the two inodes
*/
@@ -390,7 +390,8 @@ data_copy:
/* Even in case of data=writeback it is reasonable to pin
* inode to transaction, to prevent unexpected data loss */
- *err = ext4_jbd2_inode_add_write(handle, orig_inode);
+ *err = ext4_jbd2_inode_add_write(handle, orig_inode,
+ (loff_t)orig_page_offset << PAGE_SHIFT, replaced_size);
unlock_pages:
unlock_page(pagep[0]);
diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index cd01c4a67ffb..129029534075 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -82,8 +82,18 @@ static struct buffer_head *ext4_append(handle_t *handle,
static int ext4_dx_csum_verify(struct inode *inode,
struct ext4_dir_entry *dirent);
+/*
+ * Hints to ext4_read_dirblock regarding whether we expect a directory
+ * block being read to be an index block, or a block containing
+ * directory entries (and if the latter, whether it was found via a
+ * logical block in an htree index block). This is used to control
+ * what sort of sanity checkinig ext4_read_dirblock() will do on the
+ * directory block read from the storage device. EITHER will means
+ * the caller doesn't know what kind of directory block will be read,
+ * so no specific verification will be done.
+ */
typedef enum {
- EITHER, INDEX, DIRENT
+ EITHER, INDEX, DIRENT, DIRENT_HTREE
} dirblock_type_t;
#define ext4_read_dirblock(inode, block, type) \
@@ -109,11 +119,14 @@ static struct buffer_head *__ext4_read_dirblock(struct inode *inode,
return bh;
}
- if (!bh) {
+ if (!bh && (type == INDEX || type == DIRENT_HTREE)) {
ext4_error_inode(inode, func, line, block,
- "Directory hole found");
+ "Directory hole found for htree %s block",
+ (type == INDEX) ? "index" : "leaf");
return ERR_PTR(-EFSCORRUPTED);
}
+ if (!bh)
+ return NULL;
dirent = (struct ext4_dir_entry *) bh->b_data;
/* Determine whether or not we have an index block */
if (is_dx(inode)) {
@@ -150,7 +163,7 @@ static struct buffer_head *__ext4_read_dirblock(struct inode *inode,
}
}
if (!is_dx_block) {
- if (ext4_dirent_csum_verify(inode, dirent))
+ if (ext4_dirblock_csum_verify(inode, bh))
set_buffer_verified(bh);
else {
ext4_error_inode(inode, func, line, block,
@@ -280,9 +293,11 @@ static int ext4_dx_add_entry(handle_t *handle, struct ext4_filename *fname,
struct inode *dir, struct inode *inode);
/* checksumming functions */
-void initialize_dirent_tail(struct ext4_dir_entry_tail *t,
- unsigned int blocksize)
+void ext4_initialize_dirent_tail(struct buffer_head *bh,
+ unsigned int blocksize)
{
+ struct ext4_dir_entry_tail *t = EXT4_DIRENT_TAIL(bh->b_data, blocksize);
+
memset(t, 0, sizeof(struct ext4_dir_entry_tail));
t->det_rec_len = ext4_rec_len_to_disk(
sizeof(struct ext4_dir_entry_tail), blocksize);
@@ -291,17 +306,17 @@ void initialize_dirent_tail(struct ext4_dir_entry_tail *t,
/* Walk through a dirent block to find a checksum "dirent" at the tail */
static struct ext4_dir_entry_tail *get_dirent_tail(struct inode *inode,
- struct ext4_dir_entry *de)
+ struct buffer_head *bh)
{
struct ext4_dir_entry_tail *t;
#ifdef PARANOID
struct ext4_dir_entry *d, *top;
- d = de;
- top = (struct ext4_dir_entry *)(((void *)de) +
+ d = (struct ext4_dir_entry *)bh->b_data;
+ top = (struct ext4_dir_entry *)(bh->b_data +
(EXT4_BLOCK_SIZE(inode->i_sb) -
- sizeof(struct ext4_dir_entry_tail)));
+ sizeof(struct ext4_dir_entry_tail)));
while (d < top && d->rec_len)
d = (struct ext4_dir_entry *)(((void *)d) +
le16_to_cpu(d->rec_len));
@@ -311,7 +326,7 @@ static struct ext4_dir_entry_tail *get_dirent_tail(struct inode *inode,
t = (struct ext4_dir_entry_tail *)d;
#else
- t = EXT4_DIRENT_TAIL(de, EXT4_BLOCK_SIZE(inode->i_sb));
+ t = EXT4_DIRENT_TAIL(bh->b_data, EXT4_BLOCK_SIZE(inode->i_sb));
#endif
if (t->det_reserved_zero1 ||
@@ -323,8 +338,7 @@ static struct ext4_dir_entry_tail *get_dirent_tail(struct inode *inode,
return t;
}
-static __le32 ext4_dirent_csum(struct inode *inode,
- struct ext4_dir_entry *dirent, int size)
+static __le32 ext4_dirblock_csum(struct inode *inode, void *dirent, int size)
{
struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
struct ext4_inode_info *ei = EXT4_I(inode);
@@ -344,49 +358,49 @@ static void __warn_no_space_for_csum(struct inode *inode, const char *func,
"No space for directory leaf checksum. Please run e2fsck -D.");
}
-int ext4_dirent_csum_verify(struct inode *inode, struct ext4_dir_entry *dirent)
+int ext4_dirblock_csum_verify(struct inode *inode, struct buffer_head *bh)
{
struct ext4_dir_entry_tail *t;
if (!ext4_has_metadata_csum(inode->i_sb))
return 1;
- t = get_dirent_tail(inode, dirent);
+ t = get_dirent_tail(inode, bh);
if (!t) {
warn_no_space_for_csum(inode);
return 0;
}
- if (t->det_checksum != ext4_dirent_csum(inode, dirent,
- (void *)t - (void *)dirent))
+ if (t->det_checksum != ext4_dirblock_csum(inode, bh->b_data,
+ (char *)t - bh->b_data))
return 0;
return 1;
}
-static void ext4_dirent_csum_set(struct inode *inode,
- struct ext4_dir_entry *dirent)
+static void ext4_dirblock_csum_set(struct inode *inode,
+ struct buffer_head *bh)
{
struct ext4_dir_entry_tail *t;
if (!ext4_has_metadata_csum(inode->i_sb))
return;
- t = get_dirent_tail(inode, dirent);
+ t = get_dirent_tail(inode, bh);
if (!t) {
warn_no_space_for_csum(inode);
return;
}
- t->det_checksum = ext4_dirent_csum(inode, dirent,
- (void *)t - (void *)dirent);
+ t->det_checksum = ext4_dirblock_csum(inode, bh->b_data,
+ (char *)t - bh->b_data);
}
-int ext4_handle_dirty_dirent_node(handle_t *handle,
- struct inode *inode,
- struct buffer_head *bh)
+int ext4_handle_dirty_dirblock(handle_t *handle,
+ struct inode *inode,
+ struct buffer_head *bh)
{
- ext4_dirent_csum_set(inode, (struct ext4_dir_entry *)bh->b_data);
+ ext4_dirblock_csum_set(inode, bh);
return ext4_handle_dirty_metadata(handle, inode, bh);
}
@@ -980,7 +994,7 @@ static int htree_dirblock_to_tree(struct file *dir_file,
dxtrace(printk(KERN_INFO "In htree dirblock_to_tree: block %lu\n",
(unsigned long)block));
- bh = ext4_read_dirblock(dir, block, DIRENT);
+ bh = ext4_read_dirblock(dir, block, DIRENT_HTREE);
if (IS_ERR(bh))
return PTR_ERR(bh);
@@ -1090,10 +1104,10 @@ int ext4_htree_fill_tree(struct file *dir_file, __u32 start_hash,
hinfo.seed = EXT4_SB(dir->i_sb)->s_hash_seed;
if (ext4_has_inline_data(dir)) {
int has_inline_data = 1;
- count = htree_inlinedir_to_tree(dir_file, dir, 0,
- &hinfo, start_hash,
- start_minor_hash,
- &has_inline_data);
+ count = ext4_inlinedir_to_tree(dir_file, dir, 0,
+ &hinfo, start_hash,
+ start_minor_hash,
+ &has_inline_data);
if (has_inline_data) {
*next_hash = ~0;
return count;
@@ -1259,19 +1273,24 @@ static void dx_insert_block(struct dx_frame *frame, u32 hash, ext4_lblk_t block)
#ifdef CONFIG_UNICODE
/*
* Test whether a case-insensitive directory entry matches the filename
- * being searched for.
+ * being searched for. If quick is set, assume the name being looked up
+ * is already in the casefolded form.
*
* Returns: 0 if the directory entry matches, more than 0 if it
* doesn't match or less than zero on error.
*/
int ext4_ci_compare(const struct inode *parent, const struct qstr *name,
- const struct qstr *entry)
+ const struct qstr *entry, bool quick)
{
const struct ext4_sb_info *sbi = EXT4_SB(parent->i_sb);
const struct unicode_map *um = sbi->s_encoding;
int ret;
- ret = utf8_strncasecmp(um, name, entry);
+ if (quick)
+ ret = utf8_strncasecmp_folded(um, name, entry);
+ else
+ ret = utf8_strncasecmp(um, name, entry);
+
if (ret < 0) {
/* Handle invalid character sequence as either an error
* or as an opaque byte sequence.
@@ -1287,6 +1306,32 @@ int ext4_ci_compare(const struct inode *parent, const struct qstr *name,
return ret;
}
+
+void ext4_fname_setup_ci_filename(struct inode *dir, const struct qstr *iname,
+ struct fscrypt_str *cf_name)
+{
+ int len;
+
+ if (!IS_CASEFOLDED(dir)) {
+ cf_name->name = NULL;
+ return;
+ }
+
+ cf_name->name = kmalloc(EXT4_NAME_LEN, GFP_NOFS);
+ if (!cf_name->name)
+ return;
+
+ len = utf8_casefold(EXT4_SB(dir->i_sb)->s_encoding,
+ iname, cf_name->name,
+ EXT4_NAME_LEN);
+ if (len <= 0) {
+ kfree(cf_name->name);
+ cf_name->name = NULL;
+ return;
+ }
+ cf_name->len = (unsigned) len;
+
+}
#endif
/*
@@ -1313,8 +1358,15 @@ static inline bool ext4_match(const struct inode *parent,
#endif
#ifdef CONFIG_UNICODE
- if (EXT4_SB(parent->i_sb)->s_encoding && IS_CASEFOLDED(parent))
- return (ext4_ci_compare(parent, fname->usr_fname, &entry) == 0);
+ if (EXT4_SB(parent->i_sb)->s_encoding && IS_CASEFOLDED(parent)) {
+ if (fname->cf_name.name) {
+ struct qstr cf = {.name = fname->cf_name.name,
+ .len = fname->cf_name.len};
+ return !ext4_ci_compare(parent, &cf, &entry, true);
+ }
+ return !ext4_ci_compare(parent, fname->usr_fname, &entry,
+ false);
+ }
#endif
return fscrypt_match_name(&f, de->name, de->name_len);
@@ -1484,8 +1536,7 @@ restart:
if (!buffer_verified(bh) &&
!is_dx_internal_node(dir, block,
(struct ext4_dir_entry *)bh->b_data) &&
- !ext4_dirent_csum_verify(dir,
- (struct ext4_dir_entry *)bh->b_data)) {
+ !ext4_dirblock_csum_verify(dir, bh)) {
EXT4_ERROR_INODE(dir, "checksumming directory "
"block %lu", (unsigned long)block);
brelse(bh);
@@ -1586,7 +1637,7 @@ static struct buffer_head * ext4_dx_find_entry(struct inode *dir,
return (struct buffer_head *) frame;
do {
block = dx_get_block(frame->at);
- bh = ext4_read_dirblock(dir, block, DIRENT);
+ bh = ext4_read_dirblock(dir, block, DIRENT_HTREE);
if (IS_ERR(bh))
goto errout;
@@ -1769,7 +1820,6 @@ static struct ext4_dir_entry_2 *do_split(handle_t *handle, struct inode *dir,
char *data1 = (*bh)->b_data, *data2;
unsigned split, move, size;
struct ext4_dir_entry_2 *de = NULL, *de2;
- struct ext4_dir_entry_tail *t;
int csum_size = 0;
int err = 0, i;
@@ -1830,11 +1880,8 @@ static struct ext4_dir_entry_2 *do_split(handle_t *handle, struct inode *dir,
(char *) de2,
blocksize);
if (csum_size) {
- t = EXT4_DIRENT_TAIL(data2, blocksize);
- initialize_dirent_tail(t, blocksize);
-
- t = EXT4_DIRENT_TAIL(data1, blocksize);
- initialize_dirent_tail(t, blocksize);
+ ext4_initialize_dirent_tail(*bh, blocksize);
+ ext4_initialize_dirent_tail(bh2, blocksize);
}
dxtrace(dx_show_leaf(dir, hinfo, (struct ext4_dir_entry_2 *) data1,
@@ -1848,7 +1895,7 @@ static struct ext4_dir_entry_2 *do_split(handle_t *handle, struct inode *dir,
de = de2;
}
dx_insert_block(frame, hash2 + continued, newblock);
- err = ext4_handle_dirty_dirent_node(handle, dir, bh2);
+ err = ext4_handle_dirty_dirblock(handle, dir, bh2);
if (err)
goto journal_error;
err = ext4_handle_dirty_dx_node(handle, dir, frame->bh);
@@ -1976,7 +2023,7 @@ static int add_dirent_to_buf(handle_t *handle, struct ext4_filename *fname,
inode_inc_iversion(dir);
ext4_mark_inode_dirty(handle, dir);
BUFFER_TRACE(bh, "call ext4_handle_dirty_metadata");
- err = ext4_handle_dirty_dirent_node(handle, dir, bh);
+ err = ext4_handle_dirty_dirblock(handle, dir, bh);
if (err)
ext4_std_error(dir->i_sb, err);
return 0;
@@ -1995,8 +2042,7 @@ static int make_indexed_dir(handle_t *handle, struct ext4_filename *fname,
struct dx_frame frames[EXT4_HTREE_LEVEL], *frame;
struct dx_entry *entries;
struct ext4_dir_entry_2 *de, *de2;
- struct ext4_dir_entry_tail *t;
- char *data1, *top;
+ char *data2, *top;
unsigned len;
int retval;
unsigned blocksize;
@@ -2036,21 +2082,18 @@ static int make_indexed_dir(handle_t *handle, struct ext4_filename *fname,
return PTR_ERR(bh2);
}
ext4_set_inode_flag(dir, EXT4_INODE_INDEX);
- data1 = bh2->b_data;
+ data2 = bh2->b_data;
- memcpy (data1, de, len);
- de = (struct ext4_dir_entry_2 *) data1;
- top = data1 + len;
+ memcpy(data2, de, len);
+ de = (struct ext4_dir_entry_2 *) data2;
+ top = data2 + len;
while ((char *)(de2 = ext4_next_entry(de, blocksize)) < top)
de = de2;
- de->rec_len = ext4_rec_len_to_disk(data1 + (blocksize - csum_size) -
- (char *) de,
- blocksize);
+ de->rec_len = ext4_rec_len_to_disk(data2 + (blocksize - csum_size) -
+ (char *) de, blocksize);
- if (csum_size) {
- t = EXT4_DIRENT_TAIL(data1, blocksize);
- initialize_dirent_tail(t, blocksize);
- }
+ if (csum_size)
+ ext4_initialize_dirent_tail(bh2, blocksize);
/* Initialize the root; the dot dirents already exist */
de = (struct ext4_dir_entry_2 *) (&root->dotdot);
@@ -2080,7 +2123,7 @@ static int make_indexed_dir(handle_t *handle, struct ext4_filename *fname,
retval = ext4_handle_dirty_dx_node(handle, dir, frame->bh);
if (retval)
goto out_frames;
- retval = ext4_handle_dirty_dirent_node(handle, dir, bh2);
+ retval = ext4_handle_dirty_dirblock(handle, dir, bh2);
if (retval)
goto out_frames;
@@ -2120,7 +2163,6 @@ static int ext4_add_entry(handle_t *handle, struct dentry *dentry,
struct inode *dir = d_inode(dentry->d_parent);
struct buffer_head *bh = NULL;
struct ext4_dir_entry_2 *de;
- struct ext4_dir_entry_tail *t;
struct super_block *sb;
struct ext4_sb_info *sbi;
struct ext4_filename fname;
@@ -2170,6 +2212,11 @@ static int ext4_add_entry(handle_t *handle, struct dentry *dentry,
blocks = dir->i_size >> sb->s_blocksize_bits;
for (block = 0; block < blocks; block++) {
bh = ext4_read_dirblock(dir, block, DIRENT);
+ if (bh == NULL) {
+ bh = ext4_bread(handle, dir, block,
+ EXT4_GET_BLOCKS_CREATE);
+ goto add_to_new_block;
+ }
if (IS_ERR(bh)) {
retval = PTR_ERR(bh);
bh = NULL;
@@ -2190,6 +2237,7 @@ static int ext4_add_entry(handle_t *handle, struct dentry *dentry,
brelse(bh);
}
bh = ext4_append(handle, dir, &block);
+add_to_new_block:
if (IS_ERR(bh)) {
retval = PTR_ERR(bh);
bh = NULL;
@@ -2199,10 +2247,8 @@ static int ext4_add_entry(handle_t *handle, struct dentry *dentry,
de->inode = 0;
de->rec_len = ext4_rec_len_to_disk(blocksize - csum_size, blocksize);
- if (csum_size) {
- t = EXT4_DIRENT_TAIL(bh->b_data, blocksize);
- initialize_dirent_tail(t, blocksize);
- }
+ if (csum_size)
+ ext4_initialize_dirent_tail(bh, blocksize);
retval = add_dirent_to_buf(handle, &fname, dir, inode, de, bh);
out:
@@ -2234,7 +2280,7 @@ again:
return PTR_ERR(frame);
entries = frame->entries;
at = frame->at;
- bh = ext4_read_dirblock(dir, dx_get_block(frame->at), DIRENT);
+ bh = ext4_read_dirblock(dir, dx_get_block(frame->at), DIRENT_HTREE);
if (IS_ERR(bh)) {
err = PTR_ERR(bh);
bh = NULL;
@@ -2460,7 +2506,7 @@ static int ext4_delete_entry(handle_t *handle,
goto out;
BUFFER_TRACE(bh, "call ext4_handle_dirty_metadata");
- err = ext4_handle_dirty_dirent_node(handle, dir, bh);
+ err = ext4_handle_dirty_dirblock(handle, dir, bh);
if (unlikely(err))
goto out;
@@ -2662,7 +2708,6 @@ static int ext4_init_new_dir(handle_t *handle, struct inode *dir,
{
struct buffer_head *dir_block = NULL;
struct ext4_dir_entry_2 *de;
- struct ext4_dir_entry_tail *t;
ext4_lblk_t block = 0;
unsigned int blocksize = dir->i_sb->s_blocksize;
int csum_size = 0;
@@ -2686,13 +2731,11 @@ static int ext4_init_new_dir(handle_t *handle, struct inode *dir,
de = (struct ext4_dir_entry_2 *)dir_block->b_data;
ext4_init_dot_dotdot(inode, de, blocksize, csum_size, dir->i_ino, 0);
set_nlink(inode, 2);
- if (csum_size) {
- t = EXT4_DIRENT_TAIL(dir_block->b_data, blocksize);
- initialize_dirent_tail(t, blocksize);
- }
+ if (csum_size)
+ ext4_initialize_dirent_tail(dir_block, blocksize);
BUFFER_TRACE(dir_block, "call ext4_handle_dirty_metadata");
- err = ext4_handle_dirty_dirent_node(handle, inode, dir_block);
+ err = ext4_handle_dirty_dirblock(handle, inode, dir_block);
if (err)
goto out;
set_buffer_verified(dir_block);
@@ -2782,7 +2825,10 @@ bool ext4_empty_dir(struct inode *inode)
EXT4_ERROR_INODE(inode, "invalid size");
return true;
}
- bh = ext4_read_dirblock(inode, 0, EITHER);
+ /* The first directory block must not be a hole,
+ * so treat it as DIRENT_HTREE
+ */
+ bh = ext4_read_dirblock(inode, 0, DIRENT_HTREE);
if (IS_ERR(bh))
return true;
@@ -2804,6 +2850,10 @@ bool ext4_empty_dir(struct inode *inode)
brelse(bh);
lblock = offset >> EXT4_BLOCK_SIZE_BITS(sb);
bh = ext4_read_dirblock(inode, lblock, EITHER);
+ if (bh == NULL) {
+ offset += sb->s_blocksize;
+ continue;
+ }
if (IS_ERR(bh))
return true;
de = (struct ext4_dir_entry_2 *) bh->b_data;
@@ -3369,7 +3419,10 @@ static struct buffer_head *ext4_get_first_dir_block(handle_t *handle,
struct buffer_head *bh;
if (!ext4_has_inline_data(inode)) {
- bh = ext4_read_dirblock(inode, 0, EITHER);
+ /* The first directory block must not be a hole, so
+ * treat it as DIRENT_HTREE
+ */
+ bh = ext4_read_dirblock(inode, 0, DIRENT_HTREE);
if (IS_ERR(bh)) {
*retval = PTR_ERR(bh);
return NULL;
@@ -3430,9 +3483,8 @@ static int ext4_rename_dir_finish(handle_t *handle, struct ext4_renament *ent,
ent->inode,
ent->dir_bh);
} else {
- retval = ext4_handle_dirty_dirent_node(handle,
- ent->inode,
- ent->dir_bh);
+ retval = ext4_handle_dirty_dirblock(handle, ent->inode,
+ ent->dir_bh);
}
} else {
retval = ext4_mark_inode_dirty(handle, ent->inode);
@@ -3462,8 +3514,7 @@ static int ext4_setent(handle_t *handle, struct ext4_renament *ent,
ext4_mark_inode_dirty(handle, ent->dir);
BUFFER_TRACE(ent->bh, "call ext4_handle_dirty_metadata");
if (!ent->inlined) {
- retval = ext4_handle_dirty_dirent_node(handle,
- ent->dir, ent->bh);
+ retval = ext4_handle_dirty_dirblock(handle, ent->dir, ent->bh);
if (unlikely(retval)) {
ext4_std_error(ent->dir->i_sb, retval);
return retval;
diff --git a/fs/ext4/page-io.c b/fs/ext4/page-io.c
index 56e287f5ee50..12ceadef32c5 100644
--- a/fs/ext4/page-io.c
+++ b/fs/ext4/page-io.c
@@ -66,9 +66,7 @@ static void ext4_finish_bio(struct bio *bio)
bio_for_each_segment_all(bvec, bio, iter_all) {
struct page *page = bvec->bv_page;
-#ifdef CONFIG_FS_ENCRYPTION
- struct page *data_page = NULL;
-#endif
+ struct page *bounce_page = NULL;
struct buffer_head *bh, *head;
unsigned bio_start = bvec->bv_offset;
unsigned bio_end = bio_start + bvec->bv_len;
@@ -78,13 +76,10 @@ static void ext4_finish_bio(struct bio *bio)
if (!page)
continue;
-#ifdef CONFIG_FS_ENCRYPTION
- if (!page->mapping) {
- /* The bounce data pages are unmapped. */
- data_page = page;
- fscrypt_pullback_bio_page(&page, false);
+ if (fscrypt_is_bounce_page(page)) {
+ bounce_page = page;
+ page = fscrypt_pagecache_page(bounce_page);
}
-#endif
if (bio->bi_status) {
SetPageError(page);
@@ -111,10 +106,7 @@ static void ext4_finish_bio(struct bio *bio)
bit_spin_unlock(BH_Uptodate_Lock, &head->b_state);
local_irq_restore(flags);
if (!under_io) {
-#ifdef CONFIG_FS_ENCRYPTION
- if (data_page)
- fscrypt_restore_control_page(data_page);
-#endif
+ fscrypt_free_bounce_page(bounce_page);
end_page_writeback(page);
}
}
@@ -415,7 +407,7 @@ int ext4_bio_write_page(struct ext4_io_submit *io,
struct writeback_control *wbc,
bool keep_towrite)
{
- struct page *data_page = NULL;
+ struct page *bounce_page = NULL;
struct inode *inode = page->mapping->host;
unsigned block_start;
struct buffer_head *bh, *head;
@@ -475,14 +467,22 @@ int ext4_bio_write_page(struct ext4_io_submit *io,
bh = head = page_buffers(page);
+ /*
+ * If any blocks are being written to an encrypted file, encrypt them
+ * into a bounce page. For simplicity, just encrypt until the last
+ * block which might be needed. This may cause some unneeded blocks
+ * (e.g. holes) to be unnecessarily encrypted, but this is rare and
+ * can't happen in the common case of blocksize == PAGE_SIZE.
+ */
if (IS_ENCRYPTED(inode) && S_ISREG(inode->i_mode) && nr_to_submit) {
gfp_t gfp_flags = GFP_NOFS;
+ unsigned int enc_bytes = round_up(len, i_blocksize(inode));
retry_encrypt:
- data_page = fscrypt_encrypt_page(inode, page, PAGE_SIZE, 0,
- page->index, gfp_flags);
- if (IS_ERR(data_page)) {
- ret = PTR_ERR(data_page);
+ bounce_page = fscrypt_encrypt_pagecache_blocks(page, enc_bytes,
+ 0, gfp_flags);
+ if (IS_ERR(bounce_page)) {
+ ret = PTR_ERR(bounce_page);
if (ret == -ENOMEM && wbc->sync_mode == WB_SYNC_ALL) {
if (io->io_bio) {
ext4_io_submit(io);
@@ -491,7 +491,7 @@ int ext4_bio_write_page(struct ext4_io_submit *io,
gfp_flags |= __GFP_NOFAIL;
goto retry_encrypt;
}
- data_page = NULL;
+ bounce_page = NULL;
goto out;
}
}
@@ -500,8 +500,7 @@ int ext4_bio_write_page(struct ext4_io_submit *io,
do {
if (!buffer_async_write(bh))
continue;
- ret = io_submit_add_bh(io, inode,
- data_page ? data_page : page, bh);
+ ret = io_submit_add_bh(io, inode, bounce_page ?: page, bh);
if (ret) {
/*
* We only get here on ENOMEM. Not much else
@@ -517,8 +516,7 @@ int ext4_bio_write_page(struct ext4_io_submit *io,
/* Error stopped previous loop? Clean up buffers... */
if (ret) {
out:
- if (data_page)
- fscrypt_restore_control_page(data_page);
+ fscrypt_free_bounce_page(bounce_page);
printk_ratelimited(KERN_ERR "%s: ret = %d\n", __func__, ret);
redirty_page_for_writepage(wbc, page);
do {
diff --git a/fs/ext4/sysfs.c b/fs/ext4/sysfs.c
index 04b4f53f0659..b3cd7655a6ff 100644
--- a/fs/ext4/sysfs.c
+++ b/fs/ext4/sysfs.c
@@ -230,6 +230,7 @@ static struct attribute *ext4_attrs[] = {
ATTR_LIST(journal_task),
NULL,
};
+ATTRIBUTE_GROUPS(ext4);
/* Features this copy of ext4 supports */
EXT4_ATTR_FEATURE(lazy_itable_init);
@@ -256,6 +257,7 @@ static struct attribute *ext4_feat_attrs[] = {
ATTR_LIST(metadata_csum_seed),
NULL,
};
+ATTRIBUTE_GROUPS(ext4_feat);
static void *calc_ptr(struct ext4_attr *a, struct ext4_sb_info *sbi)
{
@@ -374,13 +376,13 @@ static const struct sysfs_ops ext4_attr_ops = {
};
static struct kobj_type ext4_sb_ktype = {
- .default_attrs = ext4_attrs,
+ .default_groups = ext4_groups,
.sysfs_ops = &ext4_attr_ops,
.release = ext4_sb_release,
};
static struct kobj_type ext4_feat_ktype = {
- .default_attrs = ext4_feat_attrs,
+ .default_groups = ext4_feat_groups,
.sysfs_ops = &ext4_attr_ops,
.release = (void (*)(struct kobject *))kfree,
};
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-24 03:43:11 +0000