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authorAmir Goldstein <amir73il@gmail.com>2018-06-23 17:54:48 +0300
committerJan Kara <jack@suse.cz>2018-06-27 13:45:03 +0200
commitb812a9f5896379b6cff2ac168ddb5b89037d8e78 (patch)
tree459d434209e3b4d07d5949159b5c5d8ea0829d26 /fs/notify/mark.c
parent9b6e543450dc03635899ba56b1c39cc593694560 (diff)
downloadlinux-b812a9f5896379b6cff2ac168ddb5b89037d8e78.tar.bz2
fsnotify: pass connp and object type to fsnotify_add_mark()
Instead of passing inode and vfsmount arguments to fsnotify_add_mark() and its _locked variant, pass an abstract object pointer and the object type. The helpers fsnotify_obj_{inode,mount} are added to get the concrete object pointer from abstract object pointer. Signed-off-by: Amir Goldstein <amir73il@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs/notify/mark.c')
-rw-r--r--fs/notify/mark.c42
1 files changed, 17 insertions, 25 deletions
diff --git a/fs/notify/mark.c b/fs/notify/mark.c
index 7b595acd8ec9..7abb73b5beba 100644
--- a/fs/notify/mark.c
+++ b/fs/notify/mark.c
@@ -437,9 +437,9 @@ int fsnotify_compare_groups(struct fsnotify_group *a, struct fsnotify_group *b)
}
static int fsnotify_attach_connector_to_object(fsnotify_connp_t *connp,
- struct inode *inode,
- struct vfsmount *mnt)
+ unsigned int type)
{
+ struct inode *inode = NULL;
struct fsnotify_mark_connector *conn;
conn = kmem_cache_alloc(fsnotify_mark_connector_cachep, GFP_KERNEL);
@@ -447,13 +447,11 @@ static int fsnotify_attach_connector_to_object(fsnotify_connp_t *connp,
return -ENOMEM;
spin_lock_init(&conn->lock);
INIT_HLIST_HEAD(&conn->list);
- if (inode) {
- conn->type = FSNOTIFY_OBJ_TYPE_INODE;
- conn->inode = igrab(inode);
- } else {
- conn->type = FSNOTIFY_OBJ_TYPE_VFSMOUNT;
- conn->mnt = mnt;
- }
+ conn->type = type;
+ if (conn->type == FSNOTIFY_OBJ_TYPE_INODE)
+ inode = conn->inode = igrab(fsnotify_obj_inode(connp));
+ else if (conn->type == FSNOTIFY_OBJ_TYPE_VFSMOUNT)
+ conn->mnt = &fsnotify_obj_mount(connp)->mnt;
/*
* cmpxchg() provides the barrier so that readers of *connp can see
* only initialized structure
@@ -502,27 +500,22 @@ out:
* priority, highest number first, and then by the group's location in memory.
*/
static int fsnotify_add_mark_list(struct fsnotify_mark *mark,
- struct inode *inode, struct vfsmount *mnt,
+ fsnotify_connp_t *connp, unsigned int type,
int allow_dups)
{
struct fsnotify_mark *lmark, *last = NULL;
struct fsnotify_mark_connector *conn;
- fsnotify_connp_t *connp;
int cmp;
int err = 0;
- if (WARN_ON(!inode && !mnt))
+ if (WARN_ON(!fsnotify_valid_obj_type(type)))
return -EINVAL;
- if (inode)
- connp = &inode->i_fsnotify_marks;
- else
- connp = &real_mount(mnt)->mnt_fsnotify_marks;
restart:
spin_lock(&mark->lock);
conn = fsnotify_grab_connector(connp);
if (!conn) {
spin_unlock(&mark->lock);
- err = fsnotify_attach_connector_to_object(connp, inode, mnt);
+ err = fsnotify_attach_connector_to_object(connp, type);
if (err)
return err;
goto restart;
@@ -568,14 +561,13 @@ out_err:
* These marks may be used for the fsnotify backend to determine which
* event types should be delivered to which group.
*/
-int fsnotify_add_mark_locked(struct fsnotify_mark *mark, struct inode *inode,
- struct vfsmount *mnt, int allow_dups)
+int fsnotify_add_mark_locked(struct fsnotify_mark *mark,
+ fsnotify_connp_t *connp, unsigned int type,
+ int allow_dups)
{
struct fsnotify_group *group = mark->group;
int ret = 0;
- BUG_ON(inode && mnt);
- BUG_ON(!inode && !mnt);
BUG_ON(!mutex_is_locked(&group->mark_mutex));
/*
@@ -592,7 +584,7 @@ int fsnotify_add_mark_locked(struct fsnotify_mark *mark, struct inode *inode,
fsnotify_get_mark(mark); /* for g_list */
spin_unlock(&mark->lock);
- ret = fsnotify_add_mark_list(mark, inode, mnt, allow_dups);
+ ret = fsnotify_add_mark_list(mark, connp, type, allow_dups);
if (ret)
goto err;
@@ -612,14 +604,14 @@ err:
return ret;
}
-int fsnotify_add_mark(struct fsnotify_mark *mark, struct inode *inode,
- struct vfsmount *mnt, int allow_dups)
+int fsnotify_add_mark(struct fsnotify_mark *mark, fsnotify_connp_t *connp,
+ unsigned int type, int allow_dups)
{
int ret;
struct fsnotify_group *group = mark->group;
mutex_lock(&group->mark_mutex);
- ret = fsnotify_add_mark_locked(mark, inode, mnt, allow_dups);
+ ret = fsnotify_add_mark_locked(mark, connp, type, allow_dups);
mutex_unlock(&group->mark_mutex);
return ret;
}