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authorGabriel Krisman Bertazi <krisman@collabora.com>2021-10-25 16:27:38 -0300
committerJan Kara <jack@suse.cz>2021-10-27 12:37:20 +0200
commit4bd5a5c8e6e5cd964e9738e6ef87f6c2cb453edf (patch)
tree0bbe923f386411b6ca8fce6e911da7e8e93d5b2f /fs/notify
parent2c5069433a3adc01ff9c5673567961bb7f138074 (diff)
fanotify: Add helpers to decide whether to report FID/DFID
Now that there is an event that reports FID records even for a zeroed file handle, wrap the logic that deides whether to issue the records into helper functions. This shouldn't have any impact on the code, but simplifies further patches. Link: https://lore.kernel.org/r/20211025192746.66445-24-krisman@collabora.com Reviewed-by: Jan Kara <jack@suse.cz> Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.com> Reviewed-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.h10
-rw-r--r--fs/notify/fanotify/fanotify_user.c13
2 files changed, 17 insertions, 6 deletions
diff --git a/fs/notify/fanotify/fanotify.h b/fs/notify/fanotify/fanotify.h
index 3510d06654ed..80af269eebb8 100644
--- a/fs/notify/fanotify/fanotify.h
+++ b/fs/notify/fanotify/fanotify.h
@@ -264,6 +264,16 @@ static inline int fanotify_event_dir_fh_len(struct fanotify_event *event)
return info ? fanotify_info_dir_fh_len(info) : 0;
}
+static inline bool fanotify_event_has_object_fh(struct fanotify_event *event)
+{
+ return fanotify_event_object_fh_len(event) > 0;
+}
+
+static inline bool fanotify_event_has_dir_fh(struct fanotify_event *event)
+{
+ return fanotify_event_dir_fh_len(event) > 0;
+}
+
struct fanotify_path_event {
struct fanotify_event fae;
struct path path;
diff --git a/fs/notify/fanotify/fanotify_user.c b/fs/notify/fanotify/fanotify_user.c
index 2f4182b754b2..a9b5c36ee49e 100644
--- a/fs/notify/fanotify/fanotify_user.c
+++ b/fs/notify/fanotify/fanotify_user.c
@@ -140,10 +140,9 @@ static size_t fanotify_event_len(unsigned int info_mode,
return event_len;
info = fanotify_event_info(event);
- dir_fh_len = fanotify_event_dir_fh_len(event);
- fh_len = fanotify_event_object_fh_len(event);
- if (dir_fh_len) {
+ if (fanotify_event_has_dir_fh(event)) {
+ dir_fh_len = fanotify_event_dir_fh_len(event);
event_len += fanotify_fid_info_len(dir_fh_len, info->name_len);
} else if ((info_mode & FAN_REPORT_NAME) &&
(event->mask & FAN_ONDIR)) {
@@ -157,8 +156,10 @@ static size_t fanotify_event_len(unsigned int info_mode,
if (info_mode & FAN_REPORT_PIDFD)
event_len += FANOTIFY_PIDFD_INFO_HDR_LEN;
- if (fh_len)
+ if (fanotify_event_has_object_fh(event)) {
+ fh_len = fanotify_event_object_fh_len(event);
event_len += fanotify_fid_info_len(fh_len, dot_len);
+ }
return event_len;
}
@@ -451,7 +452,7 @@ static int copy_info_records_to_user(struct fanotify_event *event,
/*
* Event info records order is as follows: dir fid + name, child fid.
*/
- if (fanotify_event_dir_fh_len(event)) {
+ if (fanotify_event_has_dir_fh(event)) {
info_type = info->name_len ? FAN_EVENT_INFO_TYPE_DFID_NAME :
FAN_EVENT_INFO_TYPE_DFID;
ret = copy_fid_info_to_user(fanotify_event_fsid(event),
@@ -467,7 +468,7 @@ static int copy_info_records_to_user(struct fanotify_event *event,
total_bytes += ret;
}
- if (fanotify_event_object_fh_len(event)) {
+ if (fanotify_event_has_object_fh(event)) {
const char *dot = NULL;
int dot_len = 0;