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path: root/fs/f2fs/recovery.c
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2015-04-16f2fs: pass checkpoint reason on roll-forward recoveryJaegeuk Kim1-1/+1
This patch adds CP_RECOVERY to remain recovery information for checkpoint. And, it makes sure writing checkpoint in this case. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-04-10f2fs: do not recover wrong data indexJaegeuk Kim1-1/+3
During the roll-forward recovery, if we found a new data index written fsync lastly, we need to recover new block address. But, if that address was corrupted, we should not recover that. Otherwise, f2fs gets kernel panic from: In check_index_in_prev_nodes(), sentry = get_seg_entry(sbi, segno); --------------------------> out-of-range segno. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-04-10f2fs: do not increase link count during recoveryJaegeuk Kim1-8/+3
If there are multiple fsynced dnodes having a dent flag, roll-forward routine sets FI_INC_LINK for their inode, and recovery_dentry increases its link count accordingly. That results in normal file having a link count as 2, so we can't unlink those files. This was added to handle several inode blocks having same inode number with different directory paths. But, current f2fs doesn't replay all of path changes and only recover its dentry for the last fsynced inode block. So, there is no reason to do this. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-04-10f2fs: add F2FS_INLINE_DOTS to recover missing dot dentriesJaegeuk Kim1-1/+1
If f2fs was corrupted with missing dot dentries, it needs to recover them after fsck.f2fs detection. The underlying precedure is: 1. The fsck.f2fs remains F2FS_INLINE_DOTS flag in directory inode, if it detects missing dot dentries. 2. When f2fs looks up the corrupted directory, it triggers f2fs_add_link with proper inode numbers and their dot and dotdot names. 3. Once f2fs recovers the directory without errors, it removes F2FS_INLINE_DOTS finally. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-04-10f2fs: fix mismatching lock and unlock pages for roll-forward recoveryJaegeuk Kim1-17/+31
Previously, inode page is not correctly locked and unlocked in pair during the roll-forward recovery. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-04-10f2fs: split set_data_blkaddr from f2fs_update_extent_cacheChao Yu1-0/+1
Split __set_data_blkaddr from f2fs_update_extent_cache for readability. Additionally rename __set_data_blkaddr to set_data_blkaddr for exporting. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-03-03f2fs: avoid wrong error during recoveryJaegeuk Kim1-1/+3
During the roll-forward recovery, -ENOENT for f2fs_iget can be skipped. So, this error value should not be propagated. Reviewed-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-03-03f2fs: remove obsolete codeJaegeuk Kim1-2/+0
This patch removes obsolete code in which summary variable is not needed. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-03-03f2fs: introduce universal lookup/update interface for extent cacheChao Yu1-1/+1
In this patch, we do these jobs: 1. rename {check,update}_extent_cache to {lookup,update}_extent_info; 2. introduce universal lookup/update interface of extent cache: f2fs_{lookup,update}_extent_cache including above two real functions, then export them to function callers. So after above cleanup, we can add new rb-tree based extent cache into exported interfaces. v2: o remove "f2fs_" for inner function {lookup,update}_extent_info suggested by Jaegeuk Kim. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-02-11f2fs: merge flags in struct f2fs_sb_infoChao Yu1-2/+2
Currently, there are several variables with Boolean type as below: struct f2fs_sb_info { ... int s_dirty; bool need_fsck; bool s_closing; ... bool por_doing; ... } For this there are some issues: 1. there are some space of f2fs_sb_info is wasted due to aligning after Boolean type variables by compiler. 2. if we continuously add new flag into f2fs_sb_info, structure will be messed up. So in this patch, we try to: 1. switch s_dirty to Boolean type variable since it has two status 0/1. 2. merge s_dirty/need_fsck/s_closing/por_doing variables into s_flag. 3. introduce an enum type which can indicate different states of sbi. 4. use new introduced universal interfaces is_sbi_flag_set/{set,clear}_sbi_flag to operate flags for sbi. After that, above issues will be fixed. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-02-11f2fs: leave comment for code readabilityJaegeuk Kim1-0/+4
During the recovery, any xattr blocks should not be found, since they are written into cold log, not the warm node chain. Reviewed-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-01-09f2fs: clean up to remove parameterJaegeuk Kim1-1/+2
This patch uses dn->data_blkaddr as a parameter for the destination block address. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2014-12-08f2fs: avoid to ra unneeded blocks in recover flowChao Yu1-2/+8
To improve recovery speed, f2fs try to readahead many contiguous blocks in warm node segment, but for most time, abnormal power-off do not occur frequently, so when mount a normal power-off f2fs image, by contrary ra so many blocks and then invalid them will hurt the performance of mount. It's better to just ra the first next-block for normal condition. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2014-11-23f2fs: introduce f2fs_dentry_kunmap to clean upJaegeuk Kim1-2/+1
This patch introduces f2fs_dentry_kunmap to clean up dirty codes. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2014-11-03f2fs: enable inline dir handlingChao Yu1-1/+2
Add inline dir functions into normal dir ops' function to handle inline ops. Besides, we enable inline dir mode when a new dir inode is created if inline_data option is on. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2014-11-03f2fs: export dir operations for inline dirChao Yu1-1/+1
This patch exports some dir operations for inline dir, additionally introduces f2fs_drop_nlink from f2fs_delete_entry for reusing by inline dir function. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2014-09-30f2fs: check the use of macros on block counts and addressesJaegeuk Kim1-5/+3
This patch cleans up the existing and new macros for readability. Rule is like this. ,-----------------------------------------> MAX_BLKADDR -, | ,------------- TOTAL_BLKS ----------------------------, | | | | ,- seg0_blkaddr ,----- sit/nat/ssa/main blkaddress | block | | (SEG0_BLKADDR) | | | | (e.g., MAIN_BLKADDR) | address 0..x................ a b c d ............................. | | global seg# 0...................... m ............................. | | | | `------- MAIN_SEGS -----------' `-------------- TOTAL_SEGS ---------------------------' | | seg# 0..........xx.................. = Note = o GET_SEGNO_FROM_SEG0 : blk address -> global segno o GET_SEGNO : blk address -> segno o START_BLOCK : segno -> starting block address Reviewed-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2014-09-30f2fs: introduce cp_control structureJaegeuk Kim1-1/+4
This patch add a new data structure to control checkpoint parameters. Currently, it presents the reason of checkpoint such as is_umount and normal sync. Reviewed-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2014-09-23f2fs: remove redundant operation during roll-forward recoveryJaegeuk Kim1-24/+19
If same data is updated multiple times, we don't need to redo whole the operations. Let's just update the lastest one. Reviewed-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2014-09-23f2fs: fix roll-forward missing scenariosJaegeuk Kim1-11/+60
We can summarize the roll forward recovery scenarios as follows. [Term] F: fsync_mark, D: dentry_mark 1. inode(x) | CP | inode(x) | dnode(F) -> Update the latest inode(x). 2. inode(x) | CP | inode(F) | dnode(F) -> No problem. 3. inode(x) | CP | dnode(F) | inode(x) -> Recover to the latest dnode(F), and drop the last inode(x) 4. inode(x) | CP | dnode(F) | inode(F) -> No problem. 5. CP | inode(x) | dnode(F) -> The inode(DF) was missing. Should drop this dnode(F). 6. CP | inode(DF) | dnode(F) -> No problem. 7. CP | dnode(F) | inode(DF) -> If f2fs_iget fails, then goto next to find inode(DF). 8. CP | dnode(F) | inode(x) -> If f2fs_iget fails, then goto next to find inode(DF). But it will fail due to no inode(DF). So, this patch adds some missing points such as #1, #5, #7, and #8. Signed-off-by: Huang Ying <ying.huang@intel.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2014-09-23f2fs: use meta_inode cache to improve roll-forward speedJaegeuk Kim1-33/+23
Previously, all the dnode pages should be read during the roll-forward recovery. Even worsely, whole the chain was traversed twice. This patch removes that redundant and costly read operations by using page cache of meta_inode and readahead function as well. Reviewed-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2014-09-16f2fs: fix double lock for inode page during roll-foward recoveryJaegeuk Kim1-7/+21
If the inode is same and its data index are needed to truncate, we can fall into double lock for its inode page via get_dnode_of_data. Error case is like this. 1. write data 1, 2, 3, 4, 5 in inode #4. 2. write data 100, 102, 103, 104, 105 in dnode #6 of inode #4. 3. sync 4. update data 100->106 in dnode #6. 5. fsync inode #4. 6. power-cut -> Then, 1. go back to #3's checkpoint 2. in do_recover_data, get_dnode_of_data() gets inode #4. 3. detect 100->106 in dnode #6. 4. check_index_in_prev_nodes tries to truncate 100 in dnode #6. 5. to trigger truncate_hole, get_dnode_of_data should grab inode #4. 6. detect *kernel hang* This patch should resolve that bug. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2014-09-09f2fs: need fsck.f2fs when f2fs_bug_on is triggeredJaegeuk Kim1-4/+4
If any f2fs_bug_on is triggered, fsck.f2fs is needed. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2014-09-03f2fs: introduce F2FS_I_SB, F2FS_M_SB, and F2FS_P_SBJaegeuk Kim1-1/+1
This patch adds three inline functions to clean up dirty casting codes. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2014-08-21f2fs: remove rewrite_node_pageJaegeuk Kim1-2/+0
I think we need to let the dirty node pages remain in the page cache instead of rewriting them in their places. So, after done with successful recovery, write_checkpoint will flush all of them through the normal write path. Through this, we can avoid potential error cases in terms of block allocation. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2014-08-21f2fs: prevent checkpoint during roll-forwardJaegeuk Kim1-0/+8
Any checkpoint should not be done during the core roll-forward procedure. Especially, it includes error cases too. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2014-08-19f2fs: avoid bug_on when error is occurredJaegeuk Kim1-1/+2
During the recovery, if an error like EIO or ENOMEM, f2fs_bug_on should skip. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2014-08-19f2fs: fix to recover inline_xattr/data and blocksJaegeuk Kim1-4/+9
This patch fixes not to skip xattr recovery and inline xattr/data recovery order. Reviewed-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2014-08-19f2fs: clear FI_INC_LINK during the recoveryJaegeuk Kim1-1/+3
If an inode are fsynced multiple times with fsync & dent marks, this inode will set FI_INC_LINK at find_fsync_dnodes during the recovery. But, in recover_inode, recover_dentry doesn't clear that flag when multiple hits were occurred. So this patch removes the flag for the further consistency. Reviewed-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2014-08-02f2fs: avoid skipping recover_inline_xattr after recover_inline_dataChao Yu1-0/+2
When we recover data of inode in roll-forward procedure, and the inode has both inline data and inline xattr. We may skip recovering inline xattr if we recover inline data form node page first. This patch will fix the problem that we lost inline xattr data in above scenario. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2014-07-30f2fs: avoid retrying wrong recovery routine when error was occurredJaegeuk Kim1-1/+19
This patch eliminates the propagation of recovery errors to the next mount. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2014-06-07f2fs: avoid not to call remove_dirty_inodeJaegeuk Kim1-8/+13
There is an errorneous case during the recovery like below. In recovery_dentry, 1) dir = f2fs_iget(); 2) mark the dir with FI_DELAY_IPUT 3) goto unmap_out After the end of recovery routine, there is no dirty dentries so the dir cannot be released by iput in remove_dirty_dir_inode. This patch fixes such the bug case by handling the iget and iput in the recovery_dentry procedure. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2014-05-07f2fs: set errno when f2fs_iget failed in recover_dentryChao Yu1-1/+2
We should set the error number correctly when we fail in recover_dentry(), so the recover flow could stop for the reason as error number shows instead of continuing. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-05-07f2fs: introduce help macro ADDRS_PER_PAGE()Chao Yu1-4/+1
Introduce help macro ADDRS_PER_PAGE() to get the number of address pointers in direct node or inode. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-05-07f2fs: remove costly dirty_dir_inode operationsJaegeuk Kim1-8/+10
This patch removes list opeations in handling dirty dir inodes. Previously, F2FS traverses whole the list of dirty dir inodes to check whether there is an existing inode or not, resulting in heavy CPU overheads. So this patch removes such the traverse operations by adding FI_DIRTY_DIR to indicate the inode lies on the list or not. Through this simple flag, we can remove redundant operations gracefully. Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-04-02f2fs: use list_for_each_entry{_safe} for simplyfying codeChao Yu1-4/+2
This patch use list_for_each_entry{_safe} instead of list_for_each{_safe} for simplfying code. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-03-20f2fs: call f2fs_wait_on_page_writeback instead of native functionJaegeuk Kim1-1/+1
If a page is on writeback, f2fs can face with deadlock due to under writepages. This is caused by merging IOs inside f2fs, so if it comes to detect, let's throw merged IOs, which is implemented by f2fs_wait_on_page_writeback. Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-03-10f2fs: remove the unused ctor argument of f2fs_kmem_cache_create()Gu Zheng1-1/+1
Signed-off-by: Gu Zheng <guz.fnst@cn.fujitsu.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-02-27f2fs: use existing macro to clean up some codesChao Yu1-1/+1
This patch use existing macro F2FS_INODE/NEXT_FREE_BLKADDR to clean up some codes. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-02-17f2fs: fix a build warningJaegeuk Kim1-11/+8
This patch modifies flow a little bit to avoid the following build warnings. src/fs/f2fs/recovery.c: In function ‘check_index_in_prev_nodes’: src/fs/f2fs/recovery.c:288:51: warning: ‘sum.<U5390>.<U52f8>.ofs_in_node’ may be used uninitialized in this function [-Wmaybe-uninitialized] src/fs/f2fs/recovery.c:260:23: warning: ‘sum.nid’ may be used uninitialized in this function [-Wmaybe-uninitialized] Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-02-17f2fs: clean up with a macroJaegeuk Kim1-2/+1
This patch adds GET_BLKOFF_FROM_SEG0 to clean up some codes. Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-02-17f2fs: fix to recover xattr node blockJaegeuk Kim1-0/+3
If a new xattr node page was allocated and its inode is fsynced, we should recover the xattr node page during the roll-forward process after power-cut. But, previously, f2fs didn't handle that case, resulting in kernel panic as follows reported by Tom Li. BUG: unable to handle kernel paging request at ffffc9001c861a98 IP: [<ffffffffa0295236>] check_index_in_prev_nodes+0x86/0x2d0 [f2fs] Call Trace: [<ffffffff815ece9b>] ? printk+0x48/0x4a [<ffffffffa029626a>] recover_fsync_data+0xdca/0xf50 [f2fs] [<ffffffffa02873ae>] f2fs_fill_super+0x92e/0x970 [f2fs] [<ffffffff8112c9f8>] mount_bdev+0x1b8/0x200 [<ffffffffa0286a80>] ? f2fs_remount+0x130/0x130 [f2fs] [<ffffffffa0285e40>] f2fs_mount+0x10/0x20 [f2fs] [<ffffffff8112d4de>] mount_fs+0x3e/0x1b0 [<ffffffff810ef4eb>] ? __alloc_percpu+0xb/0x10 [<ffffffff8114761f>] vfs_kern_mount+0x6f/0x120 [<ffffffff811497b9>] do_mount+0x259/0xa90 [<ffffffff810ead1d>] ? memdup_user+0x3d/0x80 [<ffffffff810eadb3>] ? strndup_user+0x53/0x70 [<ffffffff8114a2c9>] SyS_mount+0x89/0xd0 [<ffffffff815feae2>] system_call_fastpath+0x16/0x1b This patch adds a recovery function of xattr node pages. Reported-by: Tom Li <biergaizi@members.fsf.org> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-01-20f2fs: clean checkpatch warningsChris Fries1-6/+6
Fixed a variety of trivial checkpatch warnings. The only delta should be some minor formatting on log strings that were split / too long. Signed-off-by: Chris Fries <cfries@motorola.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-01-06f2fs: add inline_data recovery routineJaegeuk Kim1-2/+6
This patch adds a inline_data recovery routine with the following policy. [prev.] [next] of inline_data flag o o -> recover inline_data o x -> remove inline_data, and then recover data blocks x o -> remove inline_data, and then recover inline_data x x -> recover data blocks Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2013-12-26f2fs: introduce F2FS_INODE macro to get f2fs_inodeJaegeuk Kim1-4/+2
This patch introduces F2FS_INODE that returns struct f2fs_inode * from the inode page. By using this macro, we can remove unnecessary casting codes like below. struct f2fs_inode *ri = &F2FS_NODE(inode_page)->i; -> struct f2fs_inode *ri = F2FS_INODE(inode_page); Reviewed-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2013-12-26f2fs: check filename length in recover_dentryChao Yu1-0/+6
In current flow, we will get Null return value of f2fs_find_entry in recover_dentry when name.len is bigger than F2FS_NAME_LEN, and then we still add this inode into its dir entry. To avoid this situation, we must check filename length before we use it. Another point is that we could remove the code of checking filename length In f2fs_find_entry, because f2fs_lookup will be called previously to ensure of validity of filename length. V2: o add WARN_ON() as Jaegeuk Kim suggested. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2013-12-23f2fs: add unlikely() macro for compiler more aggressivelyJaegeuk Kim1-1/+1
This patch adds unlikely() macro into the most of codes. The basic rule is to add that when: - checking unusual errors, - checking page mappings, - and the other unlikely conditions. Change log from v1: - Don't add unlikely for the NULL test and error test: advised by Andi Kleen. Cc: Chao Yu <chao2.yu@samsung.com> Cc: Andi Kleen <andi@firstfloor.org> Reviewed-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2013-12-23f2fs: avoid unneeded page release for correct _count of pageChao Yu1-4/+5
In find_fsync_dnodes() and recover_data(), our flow is like this: ->f2fs_submit_page_bio() -> f2fs_put_page() -> page_cache_release() ---- page->_count declined to zero. ->__free_pages() -> put_page_testzero() ---- page->_count will be declined again. We will get a segment fault in put_page_testzero when CONFIG_DEBUG_VM is on, or return MM with a bad page with wrong _count num. So let's just release this page. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2013-12-23f2fs: use inner macro GFP_F2FS_ZERO for simplificationChao Yu1-1/+1
Use inner macro GFP_F2FS_ZERO to instead of GFP_NOFS | __GFP_ZERO for simplification of code. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2013-12-23f2fs: refactor bio-related operationsJaegeuk Kim1-2/+2
This patch integrates redundant bio operations on read and write IOs. 1. Move bio-related codes to the top of data.c. 2. Replace f2fs_submit_bio with f2fs_submit_merged_bio, which handles read bios additionally. 3. Introduce __submit_merged_bio to submit the merged bio. 4. Change f2fs_readpage to f2fs_submit_page_bio. 5. Introduce f2fs_submit_page_mbio to integrate previous submit_read_page and submit_write_page. Reviewed-by: Gu Zheng <guz.fnst@cn.fujitsu.com> Reviewed-by: Chao Yu <chao2.yu@samsung.com > Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
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