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fsnotify: Add wrapper around fsnotify_add_event

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fsnotify_add_event is growing in number of parameters, which in most
case are just passed a NULL pointer.  So, split out a new
fsnotify_insert_event function to clean things up for users who don't
need an insert hook.

Link: https://lore.kernel.org/r/20211025192746.66445-10-krisman@collabora.com
Suggested-by: Amir Goldstein <amir73il@gmail.com>
Reviewed-by: Amir Goldstein <amir73il@gmail.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.com>
Signed-off-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Gabriel Krisman Bertazi 2021-10-25 16:27:24 -03:00 committed by Jan Kara
parent 808967a0a4
commit 1ad03c3a32
4 changed files with 25 additions and 16 deletions
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4
fs/notify/fanotify/fanotify.c
View File

@ -781,8 +781,8 @@ static int fanotify_handle_event(struct fsnotify_group *group, u32 mask,
}
fsn_event = &event->fse;
ret = fsnotify_add_event(group, fsn_event, fanotify_merge,
fanotify_insert_event);
ret = fsnotify_insert_event(group, fsn_event, fanotify_merge,
fanotify_insert_event);
if (ret) {
/* Permission events shouldn't be merged */
BUG_ON(ret == 1 && mask & FANOTIFY_PERM_EVENTS);

2
fs/notify/inotify/inotify_fsnotify.c
View File

@ -116,7 +116,7 @@ int inotify_handle_inode_event(struct fsnotify_mark *inode_mark, u32 mask,
if (len)
strcpy(event->name, name->name);
ret = fsnotify_add_event(group, fsn_event, inotify_merge, NULL);
ret = fsnotify_add_event(group, fsn_event, inotify_merge);
if (ret) {
/* Our event wasn't used in the end. Free it. */
fsnotify_destroy_event(group, fsn_event);

12
fs/notify/notification.c
View File

@ -78,12 +78,12 @@ void fsnotify_destroy_event(struct fsnotify_group *group,
* 2 if the event was not queued - either the queue of events has overflown
* or the group is shutting down.
*/
int fsnotify_add_event(struct fsnotify_group *group,
struct fsnotify_event *event,
int (*merge)(struct fsnotify_group *,
struct fsnotify_event *),
void (*insert)(struct fsnotify_group *,
struct fsnotify_event *))
int fsnotify_insert_event(struct fsnotify_group *group,
struct fsnotify_event *event,
int (*merge)(struct fsnotify_group *,
struct fsnotify_event *),
void (*insert)(struct fsnotify_group *,
struct fsnotify_event *))
{
int ret = 0;
struct list_head *list = &group->notification_list;

23
include/linux/fsnotify_backend.h
View File

@ -498,16 +498,25 @@ extern int fsnotify_fasync(int fd, struct file *file, int on);
extern void fsnotify_destroy_event(struct fsnotify_group *group,
struct fsnotify_event *event);
/* attach the event to the group notification queue */
extern int fsnotify_add_event(struct fsnotify_group *group,
struct fsnotify_event *event,
int (*merge)(struct fsnotify_group *,
struct fsnotify_event *),
void (*insert)(struct fsnotify_group *,
struct fsnotify_event *));
extern int fsnotify_insert_event(struct fsnotify_group *group,
struct fsnotify_event *event,
int (*merge)(struct fsnotify_group *,
struct fsnotify_event *),
void (*insert)(struct fsnotify_group *,
struct fsnotify_event *));
static inline int fsnotify_add_event(struct fsnotify_group *group,
struct fsnotify_event *event,
int (*merge)(struct fsnotify_group *,
struct fsnotify_event *))
{
return fsnotify_insert_event(group, event, merge, NULL);
}
/* Queue overflow event to a notification group */
static inline void fsnotify_queue_overflow(struct fsnotify_group *group)
{
fsnotify_add_event(group, group->overflow_event, NULL, NULL);
fsnotify_add_event(group, group->overflow_event, NULL);
}
static inline bool fsnotify_is_overflow_event(u32 mask)