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authorDaniel Rosenberg <drosen@google.com>2018-08-20 19:21:43 -0700
committerJaegeuk Kim <jaegeuk@kernel.org>2018-10-16 09:36:39 -0700
commit4354994f097d068a894aa1a0860da54571df3582 (patch)
treebfa7fb1e09a2caa88aa2cdcf129834537a4c6a40 /fs/f2fs/inode.c
parentfb7d70db305a1446864227abf711b756568f8242 (diff)
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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.c6
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);