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Date: Sun, 9 Jun 2013 14:40:43 +0200
From: Lino Sanfilippo <LinoSanfilippo@....de>
To: eparis@...hat.com
Cc: linux-kernel@...r.kernel.org,
Lino Sanfilippo <LinoSanfilippo@....de>
Subject: [PATCH 2/5] 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@....de>
---
fs/notify/fanotify/fanotify_user.c | 71 ++++++++++++++++++------------------
1 file changed, 35 insertions(+), 36 deletions(-)
diff --git a/fs/notify/fanotify/fanotify_user.c b/fs/notify/fanotify/fanotify_user.c
index 213f0a1..6c307d7 100644
--- a/fs/notify/fanotify/fanotify_user.c
+++ b/fs/notify/fanotify/fanotify_user.c
@@ -601,33 +601,45 @@ 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) {
- 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) {
+ fsn_mark = fanotify_add_new_mark(group, NULL, mnt);
+ if (IS_ERR(fsn_mark)) {
mutex_unlock(&group->mark_mutex);
- goto err;
+ return PTR_ERR(fsn_mark);
}
}
added = fanotify_mark_add_to_mask(fsn_mark, mask, flags);
@@ -635,9 +647,9 @@ 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,
@@ -646,7 +658,6 @@ 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);
@@ -663,22 +674,10 @@ 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);
@@ -686,9 +685,9 @@ 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 */
--
1.7.9.5
--
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