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| author | Daniel Rosenberg <drosen@google.com> | 2018-08-20 19:21:43 -0700 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2018-10-16 09:36:39 -0700 |
| commit | 4354994f097d068a894aa1a0860da54571df3582 (patch) | |
| tree | bfa7fb1e09a2caa88aa2cdcf129834537a4c6a40 /fs/f2fs/inode.c | |
| parent | fb7d70db305a1446864227abf711b756568f8242 (diff) | |
| download | linux-stable-4354994f097d068a894aa1a0860da54571df3582.tar.gz linux-stable-4354994f097d068a894aa1a0860da54571df3582.tar.bz2 linux-stable-4354994f097d068a894aa1a0860da54571df3582.zip | |
f2fs: checkpoint disabling
Note that, it requires "f2fs: return correct errno in f2fs_gc".
This adds a lightweight non-persistent snapshotting scheme to f2fs.
To use, mount with the option checkpoint=disable, and to return to
normal operation, remount with checkpoint=enable. If the filesystem
is shut down before remounting with checkpoint=enable, it will revert
back to its apparent state when it was first mounted with
checkpoint=disable. This is useful for situations where you wish to be
able to roll back the state of the disk in case of some critical
failure.
Signed-off-by: Daniel Rosenberg <drosen@google.com>
[Jaegeuk Kim: use SB_RDONLY instead of MS_RDONLY]
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/inode.c')
| -rw-r--r-- | fs/f2fs/inode.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/fs/f2fs/inode.c b/fs/f2fs/inode.c index 86e7333d60c1..4ee9d6c4b719 100644 --- a/fs/f2fs/inode.c +++ b/fs/f2fs/inode.c @@ -607,6 +607,9 @@ int f2fs_write_inode(struct inode *inode, struct writeback_control *wbc) if (!is_inode_flag_set(inode, FI_DIRTY_INODE)) return 0; + if (f2fs_is_checkpoint_ready(sbi)) + return -ENOSPC; + /* * We need to balance fs here to prevent from producing dirty node pages * during the urgent cleaning time when runing out of free sections. @@ -688,7 +691,8 @@ no_delete: stat_dec_inline_dir(inode); stat_dec_inline_inode(inode); - if (likely(!is_set_ckpt_flags(sbi, CP_ERROR_FLAG))) + if (likely(!is_set_ckpt_flags(sbi, CP_ERROR_FLAG) && + !is_sbi_flag_set(sbi, SBI_CP_DISABLED))) f2fs_bug_on(sbi, is_inode_flag_set(inode, FI_DIRTY_INODE)); else f2fs_inode_synced(inode); |