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| author |   Amir Goldstein <amir73il@gmail.com> | 2020-07-16 11:42:27 +0300 |
|---|---|---|
| committer |   Jan Kara <jack@suse.cz> | 2020-07-27 23:24:00 +0200 |
| commit | 5128063739d293b9faf8ffaa9a5dfd622bc954f5 (patch) | |
| tree | d1ef6993402d190ad3f7339d17fb050e0c52906d /fs/notify | |
| parent | fanotify: add basic support for FAN_REPORT_DIR_FID (diff) | |
| download | linux-dev-5128063739d293b9faf8ffaa9a5dfd622bc954f5.tar.xz linux-dev-5128063739d293b9faf8ffaa9a5dfd622bc954f5.zip | |
fanotify: report events with parent dir fid to sb/mount/non-dir marks
In a group with flag FAN_REPORT_DIR_FID, when adding an inode mark with
FAN_EVENT_ON_CHILD, events on non-directory children are reported with
the fid of the parent.
When adding a filesystem or mount mark or mark on a non-dir inode, we
want to report events that are "possible on child" (e.g. open/close)
also with fid of the parent, as if the victim inode's parent is
interested in events "on child".
Some events, currently only FAN_MOVE_SELF, should be reported to a
sb/mount/non-dir mark with parent fid even though they are not
reported to a watching parent.
To get the desired behavior we set the flag FAN_EVENT_ON_CHILD on
all the sb/mount/non-dir mark masks in a group with FAN_REPORT_DIR_FID.
Link: https://lore.kernel.org/r/20200716084230.30611-20-amir73il@gmail.com
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.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/fs/notify/fanotify/fanotify_user.c b/fs/notify/fanotify/fanotify_user.c index e494400711c9..7caa64d028ba 100644 --- a/fs/notify/fanotify/fanotify_user.c +++ b/fs/notify/fanotify/fanotify_user.c @@ -1220,6 +1220,13 @@ static int do_fanotify_mark(int fanotify_fd, unsigned int flags, __u64 mask, if (mnt || !S_ISDIR(inode->i_mode)) { mask &= ~FAN_EVENT_ON_CHILD; umask = FAN_EVENT_ON_CHILD; + /* + * If group needs to report parent fid, register for getting + * events with parent/name info for non-directory. + */ + if ((fid_mode & FAN_REPORT_DIR_FID) && + (flags & FAN_MARK_ADD) && !ignored) + mask |= FAN_EVENT_ON_CHILD; } /* create/update an inode mark */ |