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fsnotify: pass flags argument to fsnotify_alloc_group()

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Add flags argument to fsnotify_alloc_group(), define and use the flag
FSNOTIFY_GROUP_USER in inotify and fanotify instead of the helper
fsnotify_alloc_user_group() to indicate user allocation.

Although the flag FSNOTIFY_GROUP_USER is currently not used after group
allocation, we store the flags argument in the group struct for future
use of other group flags.

Link: https://lore.kernel.org/r/20220422120327.3459282-5-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 2022-04-22 15:03:15 +03:00 • committed by Jan Kara
parent 623af4f538
commit 867a448d58
9 changed files with 26 additions and 21 deletions
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8
include/linux/fsnotify_backend.h
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@ -210,6 +210,9 @@ struct fsnotify_group {
unsigned int priority;
bool shutdown; /* group is being shut down, don't queue more events */
#define FSNOTIFY_GROUP_USER 0x01 /* user allocated group */
int flags;
/* stores all fastpath marks assoc with this group so they can be cleaned on unregister */
struct mutex mark_mutex; /* protect marks_list */
atomic_t user_waits; /* Number of tasks waiting for user
@ -543,8 +546,9 @@ static inline void fsnotify_update_flags(struct dentry *dentry)
/* called from fsnotify listeners, such as fanotify or dnotify */
/* create a new group */
extern struct fsnotify_group *fsnotify_alloc_group(const struct fsnotify_ops *ops);
extern struct fsnotify_group *fsnotify_alloc_user_group(const struct fsnotify_ops *ops);
extern struct fsnotify_group *fsnotify_alloc_group(
const struct fsnotify_ops *ops,
int flags);
/* get reference to a group */
extern void fsnotify_get_group(struct fsnotify_group *group);
/* drop reference on a group from fsnotify_alloc_group */