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path: root/fs/f2fs/recovery.c
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2017-04-18f2fs: avoid dirty node pages in check_only recoveryJaegeuk Kim
In the check_only mode, we should not make any dirty node pages. Otherwise, we can get this panic: F2FS-fs (nvme0n1p1): Need to recover fsync data ------------[ cut here ]------------ kernel BUG at fs/f2fs/node.c:2204! CPU: 7 PID: 19923 Comm: mount Tainted: G OE 4.9.8 #2 RIP: 0010:[<ffffffffc0979c0b>] [<ffffffffc0979c0b>] flush_nat_entries+0x43b/0x7d0 [f2fs] Call Trace: [<ffffffffc096ddaa>] ? __f2fs_submit_merged_bio+0x5a/0xd0 [f2fs] [<ffffffffc096ddaa>] ? __f2fs_submit_merged_bio+0x5a/0xd0 [f2fs] [<ffffffffc096dddb>] ? __f2fs_submit_merged_bio+0x8b/0xd0 [f2fs] [<ffffffff860e450f>] ? up_write+0x1f/0x40 [<ffffffffc096dddb>] ? __f2fs_submit_merged_bio+0x8b/0xd0 [f2fs] [<ffffffffc0969f04>] write_checkpoint+0x2f4/0xf20 [f2fs] [<ffffffff860e938d>] ? trace_hardirqs_on+0xd/0x10 [<ffffffffc0960bc9>] ? f2fs_sync_fs+0x79/0x190 [f2fs] [<ffffffffc0960bc9>] ? f2fs_sync_fs+0x79/0x190 [f2fs] [<ffffffffc0960bd5>] f2fs_sync_fs+0x85/0x190 [f2fs] [<ffffffffc097b6de>] f2fs_balance_fs_bg+0x7e/0x1c0 [f2fs] [<ffffffffc0977b64>] f2fs_write_node_pages+0x34/0x350 [f2fs] [<ffffffff860e5f42>] ? __lock_is_held+0x52/0x70 [<ffffffff861d9b31>] do_writepages+0x21/0x30 [<ffffffff86298ce1>] __writeback_single_inode+0x61/0x760 [<ffffffff86909127>] ? _raw_spin_unlock+0x27/0x40 [<ffffffff8629a735>] writeback_single_inode+0xd5/0x190 [<ffffffff8629a889>] write_inode_now+0x99/0xc0 [<ffffffff86283876>] iput+0x1f6/0x2c0 [<ffffffffc0964b52>] f2fs_fill_super+0xc32/0x10c0 [f2fs] [<ffffffff86266462>] mount_bdev+0x182/0x1b0 [<ffffffffc0963f20>] ? f2fs_commit_super+0x100/0x100 [f2fs] [<ffffffffc0960da5>] f2fs_mount+0x15/0x20 [f2fs] [<ffffffff86266e08>] mount_fs+0x38/0x170 [<ffffffff86288bab>] vfs_kern_mount+0x6b/0x160 [<ffffffff8628bcfe>] do_mount+0x1be/0xd60 Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2017-02-23f2fs: change recovery policy of xattr node blockChao Yu
Currently, if we call fsync after updating the xattr date belongs to the file, f2fs needs to trigger checkpoint to keep xattr data consistent. But, this policy cause low performance as checkpoint will block most foreground operations and cause unneeded and unrelated IOs around checkpoint. This patch will reuse regular file recovery policy for xattr node block, so, we change to write xattr node block tagged with fsync flag to warm area instead of cold area, and during recovery, we search warm node chain for fsynced xattr block, and do the recovery. So, for below application IO pattern, performance can be improved obviously: - touch file - create/update/delete xattr entry in file - fsync file Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2017-02-22f2fs: fix to avoid overflow when left shifting page offsetChao Yu
We use following method to calculate size with current page index: size = index << PAGE_SHIFT If type of index has only 32-bits size, left shifting will incur overflow, which makes result incorrect. So let's cast index with 64-bits type to avoid such issue. Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2017-01-29f2fs: remove unused values in recover_fsync_dataYunlei He
This patch remove unused values in function recover_fsync_data Signed-off-by: Yunlei He <heyunlei@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-11-29f2fs: do not activate auto_recovery for fallocated i_sizeJaegeuk Kim
If a file needs to keep its i_size by fallocate, we need to turn off auto recovery during roll-forward recovery. This will resolve the below scenario. 1. xfs_io -f /mnt/f2fs/file -c "pwrite 0 4096" -c "fsync" 2. xfs_io -f /mnt/f2fs/file -c "falloc -k 4096 4096" -c "fsync" 3. md5sum /mnt/f2fs/file; 4. godown /mnt/f2fs/ 5. umount /mnt/f2fs/ 6. mount -t f2fs /dev/sdx /mnt/f2fs 7. md5sum /mnt/f2fs/file Reported-by: Chao Yu <chao@kernel.org> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-11-25f2fs: do not recover i_size if it's validJaegeuk Kim
If i_size is already valid during roll_forward recovery, we should not update it according to the block alignment. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-11-23Revert "f2fs: do not recover from previous remained wrong dnodes"Chao Yu
i_times of inode will be set with current system time which can be configured through 'date', so it's not safe to judge dnode block as garbage data or unchanged inode depend on i_times. Now, we have used enhanced 'cp_ver + cp' crc method to verify valid dnode block, so I expect recoverying invalid dnode is almost not possible. This reverts commit 807b1e1c8e08452948495b1a9985ab46d329e5c2. Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-11-23f2fs: fix wrong i_atime recoveryChao Yu
Shouldn't update in-memory i_atime with on-disk i_mtime of inode when recovering inode. Shuoran found this bug which is hidden for a long time, honour is belong to him. Signed-off-by: Shuoran Liu <liushuoran@huawei.com> Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-09-30f2fs: introduce cp_lock to protect updating of ckpt_flagsChao Yu
This patch introduces spinlock to protect updating process of ckpt_flags field in struct f2fs_checkpoint, it avoids incorrectly updating in race condition. Signed-off-by: Chao Yu <yuchao0@huawei.com> [Jaegeuk Kim: add __is_set_ckpt_flags likewise __set_ckpt_flags] Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-09-30f2fs: put directory inodes before checkpoint in roll-forward recoveryJaegeuk Kim
Before checkpoint, we'd be better drop any inodes. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-09-30f2fs: use crc and cp version to determine roll-forward recoveryJaegeuk Kim
Previously, we used cp_version only to detect recoverable dnodes. In order to avoid same garbage cp_version, we needed to truncate the next dnode during checkpoint, resulting in additional discard or data write. If we can distinguish this by using crc in addition to cp_version, we can remove this overhead. There is backward compatibility concern where it changes node_footer layout. So, this patch introduces a new checkpoint flag, CP_CRC_RECOVERY_FLAG, to detect new layout. New layout will be activated only when this flag is set. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-09-13f2fs: avoid ENOMEM during roll-forward recoveryJaegeuk Kim
This patch gives another chances during roll-forward recovery regarding to -ENOMEM. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-09-12f2fs: add common iget in add_fsync_inodeJaegeuk Kim
There is no functional change. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-09-07f2fs: add roll-forward recovery process for encrypted dentryShuoran Liu
Add roll-forward recovery process for encrypted dentry, so the first fsync issued to an encrypted file does not need writing checkpoint. This improves the performance of the following test at thousands of small files: open -> write -> fsync -> close Signed-off-by: Shuoran Liu <liushuoran@huawei.com> Acked-by: Chao Yu <yuchao0@huawei.com> [Jaegeuk Kim: modify kernel message to show encrypted names] Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-09-07f2fs: support async discardChao Yu
Like most filesystems, f2fs will issue discard command synchronously, so when user trigger fstrim through ioctl, multiple discard commands will be issued serially with sync mode, which makes poor performance. In this patch we try to support async discard, so that all discard commands can be issued and be waited for endio in batch to improve performance. Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-07-20f2fs: handle error case with f2fs_bug_onJaegeuk Kim
It's enough to show BUG or WARN by f2fs_bug_on for error case. Then, we don't need to remain corrupted filesystem. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-07-20f2fs: fix to report error number of f2fs_find_entryChao Yu
This patch fixes to report the right error number of f2fs_find_entry to its caller. Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-06-13f2fs: introduce mode=lfs mount optionJaegeuk Kim
This mount option is to enable original log-structured filesystem forcefully. So, there should be no random writes for main area. Especially, this supports host-managed SMR device. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-06-02f2fs: avoid unnecessary updating inode during fsyncJaegeuk Kim
If roll-forward recovery can recover i_size, we don't need to update inode's metadata during fsync. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-06-02f2fs: remove syncing inode page in all the casesJaegeuk Kim
This patch reduces to call them across the whole tree. - sync_inode_page() - update_inode_page() - update_inode() - f2fs_write_inode() Instead, checkpoint will flush all the dirty inode metadata before syncing node pages. Note that, this is doable, since we call mark_inode_dirty_sync() for all inode's field change which needs to update on-disk inode as well. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-06-02f2fs: introduce f2fs_i_size_write with mark_inode_dirty_syncJaegeuk Kim
This patch introduces f2fs_i_size_write() to call mark_inode_dirty_sync() with i_size_write(). Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-05-20f2fs: avoid ENOSPC fault in the recovery processJaegeuk Kim
This patch avoids impossible error injection, ENOSPC, during recovery process. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-05-18f2fs: use percpu_counter for alloc_valid_block_countJaegeuk Kim
This patch uses percpu_count for sbi->alloc_valid_block_count. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-05-11f2fs: avoid f2fs_bug_on during recoveryJaegeuk Kim
We don't need to use f2fs_bug_on() to treat with any error case when allocating a block during recovery. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-05-07f2fs: fix inode cache leakChao Yu
When testing f2fs with inline_dentry option, generic/342 reports: VFS: Busy inodes after unmount of dm-0. Self-destruct in 5 seconds. Have a nice day... After rmmod f2fs module, kenrel shows following dmesg: ============================================================================= BUG f2fs_inode_cache (Tainted: G O ): Objects remaining in f2fs_inode_cache on __kmem_cache_shutdown() ----------------------------------------------------------------------------- Disabling lock debugging due to kernel taint INFO: Slab 0xf51ca0e0 objects=22 used=1 fp=0xd1e6fc60 flags=0x40004080 CPU: 3 PID: 7455 Comm: rmmod Tainted: G B O 4.6.0-rc4+ #16 Hardware name: innotek GmbH VirtualBox/VirtualBox, BIOS VirtualBox 12/01/2006 00000086 00000086 d062fe18 c13a83a0 f51ca0e0 d062fe38 d062fea4 c11c7276 c1981040 f51ca0e0 00000016 00000001 d1e6fc60 40004080 656a624f 20737463 616d6572 6e696e69 6e692067 66326620 6e695f73 5f65646f 68636163 6e6f2065 Call Trace: [<c13a83a0>] dump_stack+0x5f/0x8f [<c11c7276>] slab_err+0x76/0x80 [<c11cbfc0>] ? __kmem_cache_shutdown+0x100/0x2f0 [<c11cbfc0>] ? __kmem_cache_shutdown+0x100/0x2f0 [<c11cbfe5>] __kmem_cache_shutdown+0x125/0x2f0 [<c1198a38>] kmem_cache_destroy+0x158/0x1f0 [<c176b43d>] ? mutex_unlock+0xd/0x10 [<f8f15aa3>] exit_f2fs_fs+0x4b/0x5a8 [f2fs] [<c10f596c>] SyS_delete_module+0x16c/0x1d0 [<c1001b10>] ? do_fast_syscall_32+0x30/0x1c0 [<c13c59bf>] ? __this_cpu_preempt_check+0xf/0x20 [<c10afa7d>] ? trace_hardirqs_on_caller+0xdd/0x210 [<c10ad50b>] ? trace_hardirqs_off+0xb/0x10 [<c1001b81>] do_fast_syscall_32+0xa1/0x1c0 [<c176d888>] sysenter_past_esp+0x45/0x74 INFO: Object 0xd1e6d9e0 @offset=6624 kmem_cache_destroy f2fs_inode_cache: Slab cache still has objects CPU: 3 PID: 7455 Comm: rmmod Tainted: G B O 4.6.0-rc4+ #16 Hardware name: innotek GmbH VirtualBox/VirtualBox, BIOS VirtualBox 12/01/2006 00000286 00000286 d062fef4 c13a83a0 f174b000 d062ff14 d062ff28 c1198ac7 c197fe18 f3c5b980 d062ff20 000d04f2 d062ff0c d062ff0c d062ff14 d062ff14 f8f20dc0 fffffff5 d062e000 d062ff30 f8f15aa3 d062ff7c c10f596c 73663266 Call Trace: [<c13a83a0>] dump_stack+0x5f/0x8f [<c1198ac7>] kmem_cache_destroy+0x1e7/0x1f0 [<f8f15aa3>] exit_f2fs_fs+0x4b/0x5a8 [f2fs] [<c10f596c>] SyS_delete_module+0x16c/0x1d0 [<c1001b10>] ? do_fast_syscall_32+0x30/0x1c0 [<c13c59bf>] ? __this_cpu_preempt_check+0xf/0x20 [<c10afa7d>] ? trace_hardirqs_on_caller+0xdd/0x210 [<c10ad50b>] ? trace_hardirqs_off+0xb/0x10 [<c1001b81>] do_fast_syscall_32+0xa1/0x1c0 [<c176d888>] sysenter_past_esp+0x45/0x74 The reason is: in recovery flow, we use delayed iput mechanism for directory which has recovered dentry block. It means the reference of inode will be held until last dirty dentry page being writebacked. But when we mount f2fs with inline_dentry option, during recovery, dirent may only be recovered into dir inode page rather than dentry page, so there are no chance for us to release inode reference in ->writepage when writebacking last dentry page. We can call paired iget/iput explicityly for inline_dentry case, but for non-inline_dentry case, iput will call writeback_single_inode to write all data pages synchronously, but during recovery, ->writepages of f2fs skips writing all pages, result in losing dirent. This patch fixes this issue by obsoleting old mechanism, and introduce a new dir_list to hold all directory inodes which has recovered datas until finishing recovery. Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-05-07f2fs: remove unneeded readahead in find_fsync_dnodesChao Yu
In find_fsync_dnodes, get_tmp_page will read dnode page synchronously, previously, ra_meta_page did the same work, which is redundant, remove it. Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-05-03f2fs: factor out fsync inode entry operationsChao Yu
Factor out fsync inode entry operations into {add,del}_fsync_inode. Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-04-26f2fs: set fsync mark only for the last dnodeJaegeuk Kim
In order to give atomic writes, we should consider power failure during sync_node_pages in fsync. So, this patch marks fsync flag only in the last dnode block. Acked-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-04-15f2fs: give -EINVAL for norecovery and rw mountJaegeuk Kim
Once detecting something to recover, f2fs should stop mounting, given norecovery and rw mount options. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-04-04mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macrosKirill A. Shutemov
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>
2016-02-22f2fs: support revoking atomic written pagesChao Yu
f2fs support atomic write with following semantics: 1. open db file 2. ioctl start atomic write 3. (write db file) * n 4. ioctl commit atomic write 5. close db file With this flow we can avoid file becoming corrupted when abnormal power cut, because we hold data of transaction in referenced pages linked in inmem_pages list of inode, but without setting them dirty, so these data won't be persisted unless we commit them in step 4. But we should still hold journal db file in memory by using volatile write, because our semantics of 'atomic write support' is incomplete, in step 4, we could fail to submit all dirty data of transaction, once partial dirty data was committed in storage, then after a checkpoint & abnormal power-cut, db file will be corrupted forever. So this patch tries to improve atomic write flow by adding a revoking flow, once inner error occurs in committing, this gives another chance to try to revoke these partial submitted data of current transaction, it makes committing operation more like aotmical one. If we're not lucky, once revoking operation was failed, EAGAIN will be reported to user for suggesting doing the recovery with held journal file, or retrying current transaction again. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-02-22f2fs: remove unneeded pointer conversionChao Yu
There are redundant pointer conversion in following call stack: - at position a, inode was been converted to f2fs_file_info. - at position b, f2fs_file_info was been converted to inode again. - truncate_blocks(inode,..) - fi = F2FS_I(inode) ---a - ADDRS_PER_PAGE(node_page, fi) - addrs_per_inode(fi) - inode = &fi->vfs_inode ---b - f2fs_has_inline_xattr(inode) - fi = F2FS_I(inode) - is_inode_flag_set(fi,..) In order to avoid unneeded conversion, alter ADDRS_PER_PAGE and addrs_per_inode to acept parameter with type of inode pointer. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-02-22f2fs: use wait_for_stable_page to avoid contentionJaegeuk Kim
In write_begin, if storage supports stable_page, we don't need to wait for writeback to update its contents. This patch introduces to use wait_for_stable_page instead of wait_on_page_writeback. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-12-30f2fs: report error of do_checkpointChao Yu
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>
2015-12-04f2fs: clean up argument of recover_dataChao Yu
In recover_data, value of argument 'type' will be CURSEG_WARM_NODE all the time, remove it for cleanup. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-12-04f2fs: do not recover from previous remained wrong dnodesJaegeuk Kim
If device does not support discard, some obsolete dnodes can be recovered by roll-forward. This patch enhances the recovery flow. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-10-12f2fs: support lower priority asynchronous readahead in ra_meta_pagesChao Yu
Now, we use ra_meta_pages to reads continuous physical blocks as much as possible to improve performance of following reads. However, ra_meta_pages uses a synchronous readahead approach by submitting bio with READ, as READ is with high priority, it can not be used in the case of preloading blocks, and it's not sure when these RAed pages will be used. This patch supports asynchronous readahead in ra_meta_pages by tagging bio with READA flag in order to allow preloading. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-10-12f2fs: don't tag REQ_META for temporary non-meta pagesChao Yu
In recovery or checkpoint flow, we grab pages temperarily in meta inode's mapping for caching temperary data, actually, datas in these pages were not meta data of f2fs, but still we tag them with REQ_META flag. However, lower device like eMMC may do some optimization for data of such type. So in order to avoid wrong optimization, we'd better remove such flag for temperary non-meta pages. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-10-09f2fs: remove unneeded f2fs_{,un}lock_op in do_recover_data()Chao Yu
Protecting recovery flow by using cp_rwsem is not needed, since we have prevent triggering any checkpoint by locking cp_mutex previously. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-10-09f2fs: fix overflow of size calculationChao Yu
We have potential overflow issue when calculating size of object, when we left shift index with PAGE_CACHE_SHIFT bits, if type of index has only 32-bits space in 32-bit architecture, left shifting will incur overflow, i.e: pgoff_t index = 0xFFFFFFFF; loff_t size = index << PAGE_CACHE_SHIFT; size: 0xFFFFF000 So we should cast index with 64-bits type to avoid this issue. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-08-20f2fs: do not write any node pages related to orphan inodesJaegeuk Kim
We should not write node pages when deleting orphan inodes. In order to do that, we can eaisly set POR_DOING flag earlier before entering orphan inode routine. Reviewed-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-08-05f2fs: recover invalid/reserved block address for fsynced fileChao Yu
When testing with generic/101 in xfstests, error message outputed as below: --- tests/generic/101.out +++ results//generic/101.out.bad @@ -10,10 +10,14 @@ File foo content after log replay: 0000000 aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa * -0200000 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 +0200000 bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb * 0372000 ... (Run 'diff -u tests/generic/101.out results/generic/101.out.bad' to see the entire diff) The test flow is like below: 1. pwrite foo -S 0xaa 0 64K 2. pwrite foo -S 0xbb 64K 61K 3. sync 4. truncate foo 64K 5. truncate foo 125K 6. fsync foo 7. flakey drop writes 8. umount After this test, we expect the data of recovered file will have the first 64k of data filling with value 0xaa and the next 61k of data filling with value 0x00 because we have fsynced it before dropping writes in dm. In f2fs, during recovering, we will only recover the valid block address in direct node page if it is marked as a fsynced dnode, but block address which means invalid/reserved (with value NULL_ADDR/NEW_ADDR) will not be recovered. So, the file recovered shows its incorrect data 0xbb in range of [61k, 125k]. In this patch, we fix to recover invalid/reserved block during recover flow. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-08-05f2fs: invalidate temporary meta pageChao Yu
To avoid meeting garbage data in next free node block at the end of warm node chain when doing recovery, we will try to zero out that invalid block. If the device is not support discard, our way for zeroing out block is: grabbing a temporary zeroed page in meta inode, then, issue write request with this page. But, we forget to release that temporary page, so our memory usage will increase without gaining any hit ratio benefit, so it's better to free it for saving memory. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-06-02f2fs: hide common code in f2fs_replace_blockChao Yu
This patch clean up codes through: 1.rename f2fs_replace_block to __f2fs_replace_block(). 2.introduce new f2fs_replace_block() to include __f2fs_replace_block() and some common related codes around __f2fs_replace_block(). Then, newly introduced function f2fs_replace_block can be used by following patch. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-05-28f2fs crypto: add filename encryption for roll-forward recoveryJaegeuk Kim
This patch adds a bit flag to indicate whether or not i_name in the inode is encrypted. If this name is encrypted, we can't do recover_dentry during roll-forward. So, f2fs_sync_file() needs to do checkpoint, if this will be needed in future. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-05-28f2fs: introduce f2fs_replace_block() for reuseChao Yu
Introduce a generic function replace_block base on recover_data_page, and export it. So with it we can operate file's meta data which is in CP/SSA area when we invoke fallocate with FALLOC_FL_COLLAPSE_RANGE flag. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-05-07f2fs: use is_valid_blkaddr to verify blkaddr for readabilityChao Yu
Export is_valid_blkaddr() and use it to replace some codes for readability. Signed-off-by: Chao Yu <chao2.yu@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2015-04-16f2fs: pass checkpoint reason on roll-forward recoveryJaegeuk Kim
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 Kim
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 Kim
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>
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