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| author | Theodore Ts'o <tytso@mit.edu> | 2014-10-05 22:56:00 -0400 |
|---|---|---|
| committer | Jiri Slaby <jslaby@suse.cz> | 2014-11-13 19:02:34 +0100 |
| commit | bead15b503cf4007a0383f6e8a7409569c41a546 (patch) | |
| tree | 381148640feaec910b546a6e0efbf374f8b7be1e /fs/ext4/ext4.h | |
| parent | 147261f789cb5b1f0d62459f849c18dea7ada958 (diff) | |
| download | lwn-bead15b503cf4007a0383f6e8a7409569c41a546.tar.gz lwn-bead15b503cf4007a0383f6e8a7409569c41a546.zip | |
ext4: add ext4_iget_normal() which is to be used for dir tree lookups
commit f4bb2981024fc91b23b4d09a8817c415396dbabb upstream.
If there is a corrupted file system which has directory entries that
point at reserved, metadata inodes, prohibit them from being used by
treating them the same way we treat Boot Loader inodes --- that is,
mark them to be bad inodes. This prohibits them from being opened,
deleted, or modified via chmod, chown, utimes, etc.
In particular, this prevents a corrupted file system which has a
directory entry which points at the journal inode from being deleted
and its blocks released, after which point Much Hilarity Ensues.
Reported-by: Sami Liedes <sami.liedes@iki.fi>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Diffstat (limited to 'fs/ext4/ext4.h')
| -rw-r--r-- | fs/ext4/ext4.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index 54d94db2cf03..4eca63f8314a 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -2093,6 +2093,7 @@ int do_journal_get_write_access(handle_t *handle, #define CONVERT_INLINE_DATA 2 extern struct inode *ext4_iget(struct super_block *, unsigned long); +extern struct inode *ext4_iget_normal(struct super_block *, unsigned long); extern int ext4_write_inode(struct inode *, struct writeback_control *); extern int ext4_setattr(struct dentry *, struct iattr *); extern int ext4_getattr(struct vfsmount *mnt, struct dentry *dentry, |