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authorJaegeuk Kim <jaegeuk.kim@samsung.com>2012-12-10 17:52:48 +0900
committerJaegeuk Kim <jaegeuk.kim@samsung.com>2012-12-11 13:43:45 +0900
commit6666e6aa9f36b2bfd6b30072c07b34f2a24becf1 (patch)
tree29a4b75710c8dc3e8df25617aae0b6e51359f1f3 /fs/f2fs/f2fs.h
parent3cd8a23948b29301f8f67b8d70c5c18fabbc05e1 (diff)
downloadop-kernel-dev-6666e6aa9f36b2bfd6b30072c07b34f2a24becf1.zip
op-kernel-dev-6666e6aa9f36b2bfd6b30072c07b34f2a24becf1.tar.gz
f2fs: fix tracking parent inode number
Previously, f2fs didn't track the parent inode number correctly which is stored in each f2fs_inode. In the case of the following scenario, a bug can be occured. Let's suppose there are one directory, "/b", and two files, "/a" and "/b/a". - pino of "/a" is ROOT_INO. - pino of "/b/a" is DIR_B_INO. Then, # sync : The inode pages of "/a" and "/b/a" contain the parent inode numbers as ROOT_INO and DIR_B_INO respectively. # mv /a /b/a : The parent inode number of "/a" should be changed to DIR_B_INO, but f2fs didn't do that. Ref. f2fs_set_link(). In order to fix this clearly, I added i_pino in f2fs_inode_info, and whenever it needs to be changed like in f2fs_add_link() and f2fs_set_link(), it is updated temporarily in f2fs_inode_info. And later, f2fs_write_inode() stores the latest information to the inode pages. For power-off-recovery, f2fs_sync_file() triggers simply f2fs_write_inode(). Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
Diffstat (limited to 'fs/f2fs/f2fs.h')
-rw-r--r--fs/f2fs/f2fs.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 2bce3a6..a18d63d 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -136,6 +136,7 @@ struct f2fs_inode_info {
unsigned long i_flags; /* keep an inode flags for ioctl */
unsigned char i_advise; /* use to give file attribute hints */
unsigned int i_current_depth; /* use only in directory structure */
+ unsigned int i_pino; /* parent inode number */
umode_t i_acl_mode; /* keep file acl mode temporarily */
/* Use below internally in f2fs*/
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