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fanotify: add basic support for FAN_REPORT_DIR_FID

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For now, the flag is mutually exclusive with FAN_REPORT_FID.
Events include a single info record of type FAN_EVENT_INFO_TYPE_DFID
with a directory file handle.

For now, events are only reported for:
- Directory modification events
- Events on children of a watching directory
- Events on directory objects

Soon, we will add support for reporting the parent directory fid
for events on non-directories with filesystem/mount mark and
support for reporting both parent directory fid and child fid.

Link: https://lore.kernel.org/r/20200716084230.30611-19-amir73il@gmail.com
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Amir Goldstein
2020-07-16 11:42:26 +03:00
committed by Jan Kara
parent 79cb299c7e
commit 83b7a59896
4 changed files with 101 additions and 17 deletions
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2
include/linux/fanotify.h
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@@ -18,7 +18,7 @@
#define FANOTIFY_CLASS_BITS (FAN_CLASS_NOTIF | FAN_CLASS_CONTENT | \
FAN_CLASS_PRE_CONTENT)
#define FANOTIFY_FID_BITS (FAN_REPORT_FID)
#define FANOTIFY_FID_BITS (FAN_REPORT_FID | FAN_REPORT_DIR_FID)
#define FANOTIFY_INIT_FLAGS (FANOTIFY_CLASS_BITS | FANOTIFY_FID_BITS | \
FAN_REPORT_TID | \