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fanotify: put duplicate code for adding vfsmount/inode marks into an own function 

The code under the groups mark_mutex in fanotify_add_inode_mark() and
fanotify_add_vfsmount_mark() is almost identical.  So put it into a
seperate function.

Signed-off-by: Lino Sanfilippo <LinoSanfilippo@gmx.de>
Cc: Eric Paris <eparis@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Lino Sanfilippo 2013-07-08 15:59:43 -07:00 committed by Linus Torvalds
parent 7b18527c4a
commit 5e9c070ca0
1 changed files with 35 additions and 36 deletions
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71
fs/notify/fanotify/fanotify_user.c
View File

@ -600,33 +600,45 @@ static __u32 fanotify_mark_add_to_mask(struct fsnotify_mark *fsn_mark,
return mask & ~oldmask;
}
static struct fsnotify_mark *fanotify_add_new_mark(struct fsnotify_group *group,
struct inode *inode,
struct vfsmount *mnt)
{
struct fsnotify_mark *mark;
int ret;
if (atomic_read(&group->num_marks) > group->fanotify_data.max_marks)
return ERR_PTR(-ENOSPC);
mark = kmem_cache_alloc(fanotify_mark_cache, GFP_KERNEL);
if (!mark)
return ERR_PTR(-ENOMEM);
fsnotify_init_mark(mark, fanotify_free_mark);
ret = fsnotify_add_mark_locked(mark, group, inode, mnt, 0);
if (ret) {
fsnotify_put_mark(mark);
return ERR_PTR(ret);
}
return mark;
}
static int fanotify_add_vfsmount_mark(struct fsnotify_group *group,
struct vfsmount *mnt, __u32 mask,
unsigned int flags)
{
struct fsnotify_mark *fsn_mark;
__u32 added;
int ret = 0;
mutex_lock(&group->mark_mutex);
fsn_mark = fsnotify_find_vfsmount_mark(group, mnt);
if (!fsn_mark) {
if (atomic_read(&group->num_marks) > group->fanotify_data.max_marks) {
fsn_mark = fanotify_add_new_mark(group, NULL, mnt);
if (IS_ERR(fsn_mark)) {
mutex_unlock(&group->mark_mutex);
return -ENOSPC;
}
fsn_mark = kmem_cache_alloc(fanotify_mark_cache, GFP_KERNEL);
if (!fsn_mark) {
mutex_unlock(&group->mark_mutex);
return -ENOMEM;
}
fsnotify_init_mark(fsn_mark, fanotify_free_mark);
ret = fsnotify_add_mark_locked(fsn_mark, group, NULL, mnt, 0);
if (ret) {
mutex_unlock(&group->mark_mutex);
goto err;
return PTR_ERR(fsn_mark);
}
}
added = fanotify_mark_add_to_mask(fsn_mark, mask, flags);
@ -634,9 +646,9 @@ static int fanotify_add_vfsmount_mark(struct fsnotify_group *group,
if (added & ~real_mount(mnt)->mnt_fsnotify_mask)
fsnotify_recalc_vfsmount_mask(mnt);
err:
fsnotify_put_mark(fsn_mark);
return ret;
return 0;
}
static int fanotify_add_inode_mark(struct fsnotify_group *group,
@ -645,7 +657,6 @@ static int fanotify_add_inode_mark(struct fsnotify_group *group,
{
struct fsnotify_mark *fsn_mark;
__u32 added;
int ret = 0;
pr_debug("%s: group=%p inode=%p\n", __func__, group, inode);
@ -662,22 +673,10 @@ static int fanotify_add_inode_mark(struct fsnotify_group *group,
mutex_lock(&group->mark_mutex);
fsn_mark = fsnotify_find_inode_mark(group, inode);
if (!fsn_mark) {
if (atomic_read(&group->num_marks) > group->fanotify_data.max_marks) {
fsn_mark = fanotify_add_new_mark(group, inode, NULL);
if (IS_ERR(fsn_mark)) {
mutex_unlock(&group->mark_mutex);
return -ENOSPC;
}
fsn_mark = kmem_cache_alloc(fanotify_mark_cache, GFP_KERNEL);
if (!fsn_mark) {
mutex_unlock(&group->mark_mutex);
return -ENOMEM;
}
fsnotify_init_mark(fsn_mark, fanotify_free_mark);
ret = fsnotify_add_mark_locked(fsn_mark, group, inode, NULL, 0);
if (ret) {
mutex_unlock(&group->mark_mutex);
goto err;
return PTR_ERR(fsn_mark);
}
}
added = fanotify_mark_add_to_mask(fsn_mark, mask, flags);
@ -685,9 +684,9 @@ static int fanotify_add_inode_mark(struct fsnotify_group *group,
if (added & ~inode->i_fsnotify_mask)
fsnotify_recalc_inode_mask(inode);
err:
fsnotify_put_mark(fsn_mark);
return ret;
return 0;
}
/* fanotify syscalls */