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fsnotify: add helper to get mask from connector

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Use a helper to get the mask from the object (i.e. i_fsnotify_mask)
to generalize code of add/remove inode/vfsmount mark.

Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Amir Goldstein 2018-06-23 17:54:50 +03:00 committed by Jan Kara
parent 36f10f55ff
commit 3ac70bfcde
3 changed files with 31 additions and 12 deletions
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16
fs/notify/fanotify/fanotify_user.c
View File

@ -542,8 +542,8 @@ static int fanotify_remove_vfsmount_mark(struct fsnotify_group *group,
removed = fanotify_mark_remove_from_mask(fsn_mark, mask, flags,
&destroy_mark);
if (removed & real_mount(mnt)->mnt_fsnotify_mask)
fsnotify_recalc_mask(real_mount(mnt)->mnt_fsnotify_marks);
if (removed & fsnotify_conn_mask(fsn_mark->connector))
fsnotify_recalc_mask(fsn_mark->connector);
if (destroy_mark)
fsnotify_detach_mark(fsn_mark);
mutex_unlock(&group->mark_mutex);
@ -571,8 +571,8 @@ static int fanotify_remove_inode_mark(struct fsnotify_group *group,
removed = fanotify_mark_remove_from_mask(fsn_mark, mask, flags,
&destroy_mark);
if (removed & inode->i_fsnotify_mask)
fsnotify_recalc_mask(inode->i_fsnotify_marks);
if (removed & fsnotify_conn_mask(fsn_mark->connector))
fsnotify_recalc_mask(fsn_mark->connector);
if (destroy_mark)
fsnotify_detach_mark(fsn_mark);
mutex_unlock(&group->mark_mutex);
@ -658,8 +658,8 @@ static int fanotify_add_vfsmount_mark(struct fsnotify_group *group,
}
}
added = fanotify_mark_add_to_mask(fsn_mark, mask, flags);
if (added & ~real_mount(mnt)->mnt_fsnotify_mask)
fsnotify_recalc_mask(real_mount(mnt)->mnt_fsnotify_marks);
if (added & ~fsnotify_conn_mask(fsn_mark->connector))
fsnotify_recalc_mask(fsn_mark->connector);
mutex_unlock(&group->mark_mutex);
fsnotify_put_mark(fsn_mark);
@ -697,8 +697,8 @@ static int fanotify_add_inode_mark(struct fsnotify_group *group,
}
}
added = fanotify_mark_add_to_mask(fsn_mark, mask, flags);
if (added & ~inode->i_fsnotify_mask)
fsnotify_recalc_mask(inode->i_fsnotify_marks);
if (added & ~fsnotify_conn_mask(fsn_mark->connector))
fsnotify_recalc_mask(fsn_mark->connector);
mutex_unlock(&group->mark_mutex);
fsnotify_put_mark(fsn_mark);

25
fs/notify/mark.c
View File

@ -109,6 +109,23 @@ void fsnotify_get_mark(struct fsnotify_mark *mark)
refcount_inc(&mark->refcnt);
}
static __u32 *fsnotify_conn_mask_p(struct fsnotify_mark_connector *conn)
{
if (conn->type == FSNOTIFY_OBJ_TYPE_INODE)
return &fsnotify_conn_inode(conn)->i_fsnotify_mask;
else if (conn->type == FSNOTIFY_OBJ_TYPE_VFSMOUNT)
return &fsnotify_conn_mount(conn)->mnt_fsnotify_mask;
return NULL;
}
__u32 fsnotify_conn_mask(struct fsnotify_mark_connector *conn)
{
if (WARN_ON(!fsnotify_valid_obj_type(conn->type)))
return 0;
return *fsnotify_conn_mask_p(conn);
}
static void __fsnotify_recalc_mask(struct fsnotify_mark_connector *conn)
{
u32 new_mask = 0;
@ -119,10 +136,10 @@ static void __fsnotify_recalc_mask(struct fsnotify_mark_connector *conn)
if (mark->flags & FSNOTIFY_MARK_FLAG_ATTACHED)
new_mask |= mark->mask;
}
if (conn->type == FSNOTIFY_OBJ_TYPE_INODE)
fsnotify_conn_inode(conn)->i_fsnotify_mask = new_mask;
else if (conn->type == FSNOTIFY_OBJ_TYPE_VFSMOUNT)
fsnotify_conn_mount(conn)->mnt_fsnotify_mask = new_mask;
if (WARN_ON(!fsnotify_valid_obj_type(conn->type)))
return;
*fsnotify_conn_mask_p(conn) = new_mask;
}
/*

2
include/linux/fsnotify_backend.h
View File

@ -401,6 +401,8 @@ extern struct fsnotify_event *fsnotify_remove_first_event(struct fsnotify_group
/* functions used to manipulate the marks attached to inodes */
/* Get mask of events for a list of marks */
extern __u32 fsnotify_conn_mask(struct fsnotify_mark_connector *conn);
/* Calculate mask of events for a list of marks */
extern void fsnotify_recalc_mask(struct fsnotify_mark_connector *conn);
extern void fsnotify_init_mark(struct fsnotify_mark *mark,