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| author | Amir Goldstein <amir73il@gmail.com> | 2020-07-16 10:42:28 +0200 |
|---|---|---|
| committer | Jan Kara <jack@suse.cz> | 2020-07-27 23:24:00 +0200 |
| commit | 929943b38daf817f2e6d303ea04401651fc3bc05 (patch) | |
| tree | 09457340373aacd99fb77e114d19e38e0c60e9e7 /fs/notify/fanotify/fanotify.c | |
| parent | fanotify: report events with parent dir fid to sb/mount/non-dir marks (diff) | |
| download | linux-929943b38daf817f2e6d303ea04401651fc3bc05.tar.xz linux-929943b38daf817f2e6d303ea04401651fc3bc05.zip | |
fanotify: add support for FAN_REPORT_NAME
Introduce a new fanotify_init() flag FAN_REPORT_NAME. It requires the
flag FAN_REPORT_DIR_FID and there is a constant for setting both flags
named FAN_REPORT_DFID_NAME.
For a group with flag FAN_REPORT_NAME, the parent fid and name are
reported for directory entry modification events (create/detete/move)
and for events on non-directory objects.
Events on directories themselves are reported with their own fid and
"." as the name.
The parent fid and name are reported with an info record of type
FAN_EVENT_INFO_TYPE_DFID_NAME, similar to the way that parent fid is
reported with into type FAN_EVENT_INFO_TYPE_DFID, but with an appended
null terminated name string.
Link: https://lore.kernel.org/r/20200716084230.30611-21-amir73il@gmail.com
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs/notify/fanotify/fanotify.c')
| -rw-r--r-- | fs/notify/fanotify/fanotify.c | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/fs/notify/fanotify/fanotify.c b/fs/notify/fanotify/fanotify.c index fc2e1fab34af..d793f3e56b26 100644 --- a/fs/notify/fanotify/fanotify.c +++ b/fs/notify/fanotify/fanotify.c @@ -522,9 +522,25 @@ static struct fanotify_event *fanotify_alloc_event(struct fsnotify_group *group, unsigned int fid_mode = FAN_GROUP_FLAG(group, FANOTIFY_FID_BITS); bool name_event = false; - if ((fid_mode & FAN_REPORT_DIR_FID) && dirid) + if ((fid_mode & FAN_REPORT_DIR_FID) && dirid) { id = dirid; + /* + * We record file name only in a group with FAN_REPORT_NAME + * and when we have a directory inode to report. + * + * For directory entry modification event, we record the fid of + * the directory and the name of the modified entry. + * + * For event on non-directory that is reported to parent, we + * record the fid of the parent and the name of the child. + */ + if ((fid_mode & FAN_REPORT_NAME) && + ((mask & ALL_FSNOTIFY_DIRENT_EVENTS) || + !(mask & FAN_ONDIR))) + name_event = true; + } + /* * For queues with unlimited length lost events are not expected and * can possibly have security implications. Avoid losing events when |