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2016-05-18f2fs: make exit_f2fs_fs more clearTiezhu Yang1-5/+5
init_f2fs_fs does: 1) f2fs_build_trace_ios 2) init_inodecache 3) create_node_manager_caches 4) create_segment_manager_caches 5) create_checkpoint_caches 6) create_extent_cache 7) kset_create_and_add 8) kobject_init_and_add 9) register_shrinker 10) register_filesystem 11) f2fs_create_root_stats 12) proc_mkdir exit_f2fs_fs should do cleanup in the reverse order to make the code more clear. Signed-off-by: Tiezhu Yang <kernelpatch@126.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-05-18f2fs: use percpu_counter for total_valid_inode_countJaegeuk Kim1-3/+8
This patch uses percpu_counter to avoid stat_lock. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-05-18f2fs: use percpu_counter for alloc_valid_block_countJaegeuk Kim1-2/+5
This patch uses percpu_count for sbi->alloc_valid_block_count. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-05-18f2fs: use percpu_counter for # of dirty pages in inodeJaegeuk Kim1-1/+6
This patch adds percpu_counter for # of dirty pages in inode. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-05-18f2fs: use percpu_counter for page countersJaegeuk Kim1-4/+27
This patch substitutes percpu_counter for atomic_counter when counting various types of pages. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-05-18f2fs: use bio count instead of F2FS_WRITEBACK page countJaegeuk Kim1-2/+1
This can reduce page counting overhead. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-05-16f2fs: add fault injection to sysfsSheng Yong1-5/+65
This patch introduces a new struct f2fs_fault_info and a global f2fs_fault to save fault injection status. Fault injection entries are created in /sys/fs/f2fs/fault_injection/ during initializing f2fs module. Signed-off-by: Sheng Yong <shengyong1@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-05-16f2fs: correct return value type of f2fs_fill_superSheng Yong1-3/+3
Signed-off-by: Sheng Yong <shengyong1@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-05-07fscrypto/f2fs: allow fs-specific key prefix for fs encryptionJaegeuk Kim1-0/+13
This patch allows fscrypto to handle a second key prefix given by filesystem. The main reason is to provide backward compatibility, since previously f2fs used "f2fs:" as a crypto prefix instead of "fscrypt:". Later, ext4 should also provide key_prefix() to give "ext4:". One concern decribed by Ted would be kinda double check overhead of prefixes. In x86, for example, validate_user_key consumes 8 ms after boot-up, which turns out derive_key_aes() consumed most of the time to load specific crypto module. After such the cold miss, it shows almost zero latencies, which treats as a negligible overhead. Note that request_key() detects wrong prefix in prior to derive_key_aes() even. Cc: Ted Tso <tytso@mit.edu> Cc: stable@vger.kernel.org # v4.6 Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-05-07f2fs: fix leak of orphan inode objectsJaegeuk Kim1-1/+1
When unmounting filesystem, we should release all the ino entries. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-05-07f2fs: inject ENOSPC failuresJaegeuk Kim1-0/+4
This patch injects ENOSPC failures. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-05-07f2fs: inject page allocation failuresJaegeuk Kim1-0/+1
This patch adds page allocation failures. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-05-07f2fs: inject kmalloc failureJaegeuk Kim1-0/+6
This patch injects kmalloc failure given a fault injection rate. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-05-07f2fs: add mount option to select fault injection ratioJaegeuk Kim1-0/+19
This patch adds a mount option to select fault ratio. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-05-07f2fs: add proc entry to show valid block bitmapJaegeuk Kim1-1/+31
This patch adds a new proc entry to show segment information in more detail. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-05-07f2fs: introduce macros for proc entriesJaegeuk Kim1-11/+14
This adds macros to be used multiple proc entries. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-04-15f2fs: treat as a normal umount when remounting roJaegeuk Kim1-8/+10
When user remounts f2fs as read-only, we can mark the checkpoint as umount. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-04-15f2fs: give -EINVAL for norecovery and rw mountJaegeuk Kim1-2/+12
Once detecting something to recover, f2fs should stop mounting, given norecovery and rw mount options. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-04-15f2fs: recover superblock at RW remountsJaegeuk Kim1-9/+27
This patch adds a sbi flag, SBI_NEED_SB_WRITE, which indicates it needs to recover superblock when (re)mounting as RW. This is set only when f2fs is mounted as RO. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-04-15f2fs: give RO message when recovering superblockJaegeuk Kim1-1/+4
When one of superblocks is missing, f2fs recovers it with the valid one. But, even if f2fs is mounted as RO, we'd better notify that too. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-04-04Merge tag 'f2fs-for-linus' of ↵Linus Torvalds1-38/+66
git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs Pull f2fs fixes from Jaegeuk Kim. * tag 'f2fs-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs: f2fs: retrieve IO write stat from the right place f2fs crypto: fix corrupted symlink in encrypted case f2fs: cover large section in sanity check of super
2016-04-04mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macrosKirill A. Shutemov1-2/+2
PAGE_CACHE_{SIZE,SHIFT,MASK,ALIGN} macros were introduced *long* time ago with promise that one day it will be possible to implement page cache with bigger chunks than PAGE_SIZE. This promise never materialized. And unlikely will. We have many places where PAGE_CACHE_SIZE assumed to be equal to PAGE_SIZE. And it's constant source of confusion on whether PAGE_CACHE_* or PAGE_* constant should be used in a particular case, especially on the border between fs and mm. Global switching to PAGE_CACHE_SIZE != PAGE_SIZE would cause to much breakage to be doable. Let's stop pretending that pages in page cache are special. They are not. The changes are pretty straight-forward: - <foo> << (PAGE_CACHE_SHIFT - PAGE_SHIFT) -> <foo>; - <foo> >> (PAGE_CACHE_SHIFT - PAGE_SHIFT) -> <foo>; - PAGE_CACHE_{SIZE,SHIFT,MASK,ALIGN} -> PAGE_{SIZE,SHIFT,MASK,ALIGN}; - page_cache_get() -> get_page(); - page_cache_release() -> put_page(); This patch contains automated changes generated with coccinelle using script below. For some reason, coccinelle doesn't patch header files. I've called spatch for them manually. The only adjustment after coccinelle is revert of changes to PAGE_CAHCE_ALIGN definition: we are going to drop it later. There are few places in the code where coccinelle didn't reach. I'll fix them manually in a separate patch. Comments and documentation also will be addressed with the separate patch. virtual patch @@ expression E; @@ - E << (PAGE_CACHE_SHIFT - PAGE_SHIFT) + E @@ expression E; @@ - E >> (PAGE_CACHE_SHIFT - PAGE_SHIFT) + E @@ @@ - PAGE_CACHE_SHIFT + PAGE_SHIFT @@ @@ - PAGE_CACHE_SIZE + PAGE_SIZE @@ @@ - PAGE_CACHE_MASK + PAGE_MASK @@ expression E; @@ - PAGE_CACHE_ALIGN(E) + PAGE_ALIGN(E) @@ expression E; @@ - page_cache_get(E) + get_page(E) @@ expression E; @@ - page_cache_release(E) + put_page(E) Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Acked-by: Michal Hocko <mhocko@suse.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-03-30f2fs: retrieve IO write stat from the right placeShuoran Liu1-1/+1
In the following patch, f2fs: split journal cache from curseg cache journal cache is split from curseg cache. So IO write statistics should be retrived from journal cache but not curseg->sum_blk. Otherwise, it will get 0, and the stat is lost. Signed-off-by: Shuoran Liu <liushuoran@huawei.com> Reviewed-by: Chao Yu <chao@kernel.org> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-03-28f2fs: cover large section in sanity check of superJaegeuk Kim1-37/+65
This patch fixes the bug which does not cover a large section case when checking the sanity of superblock. If f2fs detects misalignment, it will fix the superblock during the mount time, so it doesn't need to trigger fsck.f2fs further. Reported-by: Matthias Prager <linux@matthiasprager.de> Reported-by: David Gnedt <david.gnedt@davizone.at> Cc: stable 4.5+ <stable@vger.kernel.org> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-03-17f2fs: use cryptoapi crc32 functionsKeith Mok1-0/+13
The crc function is done bit by bit. Optimize this by use cryptoapi crc32 function which is backed by h/w acceleration. Signed-off-by: Keith Mok <ek9852@gmail.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-03-17fs crypto: move per-file encryption from f2fs tree to fs/cryptoJaegeuk Kim1-17/+38
This patch adds the renamed functions moved from the f2fs crypto files. 1. definitions for per-file encryption used by ext4 and f2fs. 2. crypto.c for encrypt/decrypt functions a. IO preparation: - fscrypt_get_ctx / fscrypt_release_ctx b. before IOs: - fscrypt_encrypt_page - fscrypt_decrypt_page - fscrypt_zeroout_range c. after IOs: - fscrypt_decrypt_bio_pages - fscrypt_pullback_bio_page - fscrypt_restore_control_page 3. policy.c supporting context management. a. For ioctls: - fscrypt_process_policy - fscrypt_get_policy b. For context permission - fscrypt_has_permitted_context - fscrypt_inherit_context 4. keyinfo.c to handle permissions - fscrypt_get_encryption_info - fscrypt_free_encryption_info 5. fname.c to support filename encryption a. general wrapper functions - fscrypt_fname_disk_to_usr - fscrypt_fname_usr_to_disk - fscrypt_setup_filename - fscrypt_free_filename b. specific filename handling functions - fscrypt_fname_alloc_buffer - fscrypt_fname_free_buffer 6. Makefile and Kconfig Cc: Al Viro <viro@ftp.linux.org.uk> Signed-off-by: Michael Halcrow <mhalcrow@google.com> Signed-off-by: Ildar Muslukhov <ildarm@google.com> Signed-off-by: Uday Savagaonkar <savagaon@google.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-02-26f2fs: introduce f2fs_flush_merged_bios for cleanupChao Yu1-5/+2
Add a new helper f2fs_flush_merged_bios to clean up redundant codes. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-02-22f2fs: show more info about superblock recoveryChao Yu1-2/+4
This patch changes to show more info in message log about the recovery of the corrupted superblock during ->mount, e.g. the index of corrupted superblock and the result of recovery. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-02-22f2fs: move sanity checking of cp into get_valid_checkpointShawn Lin1-9/+1
>From the function name of get_valid_checkpoint, it seems to return the valid cp or NULL for caller to check. If no valid one is found, f2fs_fill_super will print the err log. But if get_valid_checkpoint get one valid(the return value indicate that it's valid, however actually it is invalid after sanity checking), then print another similar err log. That seems strange. Let's keep sanity checking inside the procedure of geting valid cp. Another improvement we gained from this move is that even the large volume is supported, we check the cp in advanced to skip the following procedure if failing the sanity checking. Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-02-22f2fs: slightly reorganize read_raw_super_blockShawn Lin1-37/+36
read_raw_super_block was introduced to help find the first valid superblock. Commit da554e48caab ("f2fs: recovering broken superblock during mount") changed the behaviour to read both of them and check whether need the recovery flag or not. So the comment before this function isn't consistent with what it actually does. Also, the origin code use two tags to round the err cases, which isn't so readable. So this patch amend the comment and slightly reorganize it. Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-02-22f2fs: introduce f2fs_journal struct to wrap journal infoChao Yu1-1/+1
Introduce a new structure f2fs_journal to wrap journal info in struct f2fs_summary_block for readability. struct f2fs_journal { union { __le16 n_nats; __le16 n_sits; }; union { struct nat_journal nat_j; struct sit_journal sit_j; struct f2fs_extra_info info; }; } __packed; struct f2fs_summary_block { struct f2fs_summary entries[ENTRIES_IN_SUM]; struct f2fs_journal journal; struct summary_footer footer; } __packed; Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-02-22f2fs: split drop_inmem_pages from commit_inmem_pagesChao Yu1-1/+1
Split drop_inmem_pages from commit_inmem_pages for code readability, and prepare for the following modification. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-02-22f2fs: flush bios to handle cp_error in put_superJaegeuk Kim1-0/+7
Sometimes, if cp_error is set, there remains under-writeback pages, resulting in kernel hang in put_super. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-02-22f2fs: introduce lifetime write IO statisticsShuoran Liu1-2/+37
This patch introduces lifetime IO write statistics exposed to the sysfs interface. The write IO amount is obtained from block layer, accumulated in the file system and stored in the hot node summary of checkpoint. Signed-off-by: Shuoran Liu <liushuoran@huawei.com> Signed-off-by: Pengyang Hou <houpengyang@huawei.com> [Jaegeuk Kim: add sysfs documentation] Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-02-22f2fs: export dirty_nats_ratio in sysfsChao Yu1-0/+2
This patch exports a new sysfs entry 'dirty_nat_ratio' to control threshold of dirty nat entries, if current ratio exceeds configured threshold, checkpoint will be triggered in f2fs_balance_fs_bg for flushing dirty nats. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-01-14kmemcg: account certain kmem allocations to memcgVladimir Davydov1-2/+3
Mark those kmem allocations that are known to be easily triggered from userspace as __GFP_ACCOUNT/SLAB_ACCOUNT, which makes them accounted to memcg. For the list, see below: - threadinfo - task_struct - task_delay_info - pid - cred - mm_struct - vm_area_struct and vm_region (nommu) - anon_vma and anon_vma_chain - signal_struct - sighand_struct - fs_struct - files_struct - fdtable and fdtable->full_fds_bits - dentry and external_name - inode for all filesystems. This is the most tedious part, because most filesystems overwrite the alloc_inode method. The list is far from complete, so feel free to add more objects. Nevertheless, it should be close to "account everything" approach and keep most workloads within bounds. Malevolent users will be able to breach the limit, but this was possible even with the former "account everything" approach (simply because it did not account everything in fact). [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Vladimir Davydov <vdavydov@virtuozzo.com> Acked-by: Johannes Weiner <hannes@cmpxchg.org> Acked-by: Michal Hocko <mhocko@suse.com> Cc: Tejun Heo <tj@kernel.org> Cc: Greg Thelen <gthelen@google.com> Cc: Christoph Lameter <cl@linux.com> Cc: Pekka Enberg <penberg@kernel.org> Cc: David Rientjes <rientjes@google.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-01-11f2fs: detect idle time depending on user behaviorJaegeuk Kim1-0/+4
This patch adds last time that user requested filesystem operations. This information is used to detect whether system is idle or not later. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-01-11f2fs: introduce time and interval facilityJaegeuk Kim1-4/+3
This patch adds time and interval arrays to store some timing variables. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-01-08f2fs: avoid unnecessary f2fs_balance_fs callsJaegeuk Kim1-2/+0
Only when node page is newly dirtied, it needs to check whether we need to do f2fs_gc. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-01-03f2fs: introduce max_file_blocks in sbiChao Yu1-3/+4
Introduce max_file_blocks in sbi to store max block index of file in f2fs, it could be used to avoid unneeded calculation of max block index in runtime. Signed-off-by: Chao Yu <chao2.yu@samsung.com> [Jaegeuk Kim: fix overflow of sbi->max_file_blocks] Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-12-30f2fs: add a max block check for get_data_block_bmapYunlei He1-1/+1
This patch adds a max block check for get_data_block_bmap. Trinity test program will send a block number as parameter into ioctl_fibmap, which will be used in get_node_path(), when the block number large than f2fs max blocks, it will trigger kernel bug. Signed-off-by: Yunlei He <heyunlei@huawei.com> Signed-off-by: Xue Liu <liuxueliu.liu@huawei.com> [Jaegeuk Kim: fix missing condition, pointed by Chao Yu] Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-12-30f2fs: declare static functionJaegeuk Kim1-1/+1
The __f2fs_commit_super is static. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-12-30f2fs: report error of do_checkpointChao Yu1-2/+3
do_checkpoint and write_checkpoint can fail due to reasons like triggering in a readonly fs or encountering IO error of storage device. So it's better to report such error info to user, let user be aware of failure of doing checkpoint. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-12-16f2fs: introduce new option for controlling data flushChao Yu1-0/+7
Add a new option 'data_flush' to enable data flush functionality. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-12-16f2fs: record dirty status of regular/symlink inodeChao Yu1-2/+4
Maintain regular/symlink inode which has dirty pages in global dirty list and record their total dirty pages count like the way of handling directory inode. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-12-16f2fs: introduce __f2fs_commit_superChao Yu1-17/+13
Introduce __f2fs_commit_super to include duplicated codes in f2fs_commit_super for cleanup. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-12-16f2fs: don't grab super block buffer header all the timeChao Yu1-46/+35
We have already got one copy of valid super block in memory, do not grab buffer header of super block all the time. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-12-16f2fs: backup raw_super in sbiYunlei He1-4/+15
f2fs use fields of f2fs_super_block struct directly in a grabbed buffer. Once the buffer happen to be destroyed (e.g. through dd), it may bring in unpredictable effect on f2fs. This patch fixes to allocate additional buffer to store datas of super block rather than using grabbed block buffer directly. Signed-off-by: Yunlei He <heyunlei@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org> Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-12-15f2fs: introduce dirty list node in inode infoChao Yu1-0/+1
Add a new dirt list node member in inode info for linking the inode to global dirty list in superblock, instead of old implementation which allocate slab cache memory as an entry to inode. It avoids memory pressure due to slab cache allocation, and also makes codes more clean. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-12-15f2fs: rename {add,remove,release}_dirty_inode to {add,remove,release}_ino_entryChao Yu1-1/+1
remove_dirty_dir_inode will be renamed to remove_dirty_inode as a generic function in following patch for removing directory/regular/symlink inode in global dirty list. Here rename ino management related functions for readability, also in order to avoid name conflict. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
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