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fanotify: check FS_ISDIR flag instead of d_is_dir()

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All fsnotify hooks set the FS_ISDIR flag for events that happen
on directory victim inodes except for fsnotify_perm().

Add the missing FS_ISDIR flag in fsnotify_perm() hook and let
fanotify_group_event_mask() check the FS_ISDIR flag instead of
checking if path argument is a directory.

This is needed for fanotify support for event types that do not
carry path information.

Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Amir Goldstein 2019-01-10 19:04:41 +02:00 committed by Jan Kara
parent 0a20df7ed3
commit 0321e03cb4
2 changed files with 4 additions and 1 deletions
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2
fs/notify/fanotify/fanotify.c
View File

@ -144,7 +144,7 @@ static u32 fanotify_group_event_mask(struct fsnotify_iter_info *iter_info,
marks_ignored_mask |= mark->ignored_mask;
}
if (d_is_dir(path->dentry) &&
if (event_mask & FS_ISDIR &&
!(marks_mask & FS_ISDIR & ~marks_ignored_mask))
return 0;

3
include/linux/fsnotify.h
View File

@ -79,6 +79,9 @@ static inline int fsnotify_perm(struct file *file, int mask)
fsnotify_mask = FS_ACCESS_PERM;
}
if (S_ISDIR(inode->i_mode))
fsnotify_mask |= FS_ISDIR;
return fsnotify_path(inode, path, fsnotify_mask);
}