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authorAmir Goldstein <amir73il@gmail.com>2018-10-04 00:25:34 +0300
committerJan Kara <jack@suse.cz>2018-10-04 13:28:29 +0200
commita72fd224e37bf6a0630bce302deebbccbc236ba2 (patch)
treef4d2451ae1391a8369e9b34c3fefc58a72f680e0 /fs/notify
parent007d1e8395eaa59b0e7ad9eb2b53a40859446a88 (diff)
downloadlinux-a72fd224e37bf6a0630bce302deebbccbc236ba2.tar.bz2
fanotify: simplify handling of FAN_ONDIR
fanotify mark add/remove code jumps through hoops to avoid setting the FS_ISDIR in the commulative object mask. That was just papering over a bug in fsnotify() handling of the FS_ISDIR extra flag. This bug is now fixed, so all the hoops can be removed along with the unneeded internal flag FAN_MARK_ONDIR. Signed-off-by: Amir Goldstein <amir73il@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs/notify')
-rw-r--r--fs/notify/fanotify/fanotify_user.c32
1 files changed, 5 insertions, 27 deletions
diff --git a/fs/notify/fanotify/fanotify_user.c b/fs/notify/fanotify/fanotify_user.c
index 15719d4aa4b5..34b511407035 100644
--- a/fs/notify/fanotify/fanotify_user.c
+++ b/fs/notify/fanotify/fanotify_user.c
@@ -506,18 +506,10 @@ static __u32 fanotify_mark_remove_from_mask(struct fsnotify_mark *fsn_mark,
spin_lock(&fsn_mark->lock);
if (!(flags & FAN_MARK_IGNORED_MASK)) {
- __u32 tmask = fsn_mark->mask & ~mask;
-
- if (flags & FAN_MARK_ONDIR)
- tmask &= ~FAN_ONDIR;
-
oldmask = fsn_mark->mask;
- fsn_mark->mask = tmask;
+ fsn_mark->mask &= ~mask;
} else {
- __u32 tmask = fsn_mark->ignored_mask & ~mask;
- if (flags & FAN_MARK_ONDIR)
- tmask &= ~FAN_ONDIR;
- fsn_mark->ignored_mask = tmask;
+ fsn_mark->ignored_mask &= ~mask;
}
*destroy = !(fsn_mark->mask | fsn_mark->ignored_mask);
spin_unlock(&fsn_mark->lock);
@@ -586,19 +578,10 @@ static __u32 fanotify_mark_add_to_mask(struct fsnotify_mark *fsn_mark,
spin_lock(&fsn_mark->lock);
if (!(flags & FAN_MARK_IGNORED_MASK)) {
- __u32 tmask = fsn_mark->mask | mask;
-
- if (flags & FAN_MARK_ONDIR)
- tmask |= FAN_ONDIR;
-
oldmask = fsn_mark->mask;
- fsn_mark->mask = tmask;
+ fsn_mark->mask |= mask;
} else {
- __u32 tmask = fsn_mark->ignored_mask | mask;
- if (flags & FAN_MARK_ONDIR)
- tmask |= FAN_ONDIR;
-
- fsn_mark->ignored_mask = tmask;
+ fsn_mark->ignored_mask |= mask;
if (flags & FAN_MARK_IGNORED_SURV_MODIFY)
fsn_mark->flags |= FSNOTIFY_MARK_FLAG_IGNORED_SURV_MODIFY;
}
@@ -820,7 +803,7 @@ static int do_fanotify_mark(int fanotify_fd, unsigned int flags, __u64 mask,
struct fsnotify_group *group;
struct fd f;
struct path path;
- u32 valid_mask = FAN_ALL_EVENTS | FAN_EVENT_ON_CHILD;
+ u32 valid_mask = FAN_ALL_EVENTS | FAN_EVENT_ON_CHILD | FAN_ONDIR;
unsigned int mark_type = flags & FAN_MARK_TYPE_MASK;
int ret;
@@ -857,11 +840,6 @@ static int do_fanotify_mark(int fanotify_fd, unsigned int flags, __u64 mask,
return -EINVAL;
}
- if (mask & FAN_ONDIR) {
- flags |= FAN_MARK_ONDIR;
- mask &= ~FAN_ONDIR;
- }
-
if (IS_ENABLED(CONFIG_FANOTIFY_ACCESS_PERMISSIONS))
valid_mask |= FAN_ALL_PERM_EVENTS;