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authorAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>2011-07-06 16:32:31 +0530
committerEric Van Hensbergen <ericvh@gmail.com>2011-07-23 09:32:50 -0500
commited80fcfac2565fa866d93ba14f0e75de17a8223e (patch)
tree504a4efb5377bc5d8e9ff3a8eb45bb2b00303b93 /fs/9p/vfs_inode.c
parent4d63055fa9657aa402da25575045c23f37c3da05 (diff)
downloadlinux-ed80fcfac2565fa866d93ba14f0e75de17a8223e.tar.bz2
fs/9p: Always ask new inode in create
This make sure we don't end up reusing the unlinked inode object. The ideal way is to use inode i_generation. But i_generation is not available in userspace always. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
Diffstat (limited to 'fs/9p/vfs_inode.c')
-rw-r--r--fs/9p/vfs_inode.c22
1 files changed, 17 insertions, 5 deletions
diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c
index 3d8a18ee78e6..3bbf705634b2 100644
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -454,6 +454,11 @@ static int v9fs_test_inode(struct inode *inode, void *data)
return 1;
}
+static int v9fs_test_new_inode(struct inode *inode, void *data)
+{
+ return 0;
+}
+
static int v9fs_set_inode(struct inode *inode, void *data)
{
struct v9fs_inode *v9inode = V9FS_I(inode);
@@ -465,15 +470,22 @@ static int v9fs_set_inode(struct inode *inode, void *data)
static struct inode *v9fs_qid_iget(struct super_block *sb,
struct p9_qid *qid,
- struct p9_wstat *st)
+ struct p9_wstat *st,
+ int new)
{
int retval, umode;
unsigned long i_ino;
struct inode *inode;
struct v9fs_session_info *v9ses = sb->s_fs_info;
+ int (*test)(struct inode *, void *);
+
+ if (new)
+ test = v9fs_test_new_inode;
+ else
+ test = v9fs_test_inode;
i_ino = v9fs_qid2ino(qid);
- inode = iget5_locked(sb, i_ino, v9fs_test_inode, v9fs_set_inode, st);
+ inode = iget5_locked(sb, i_ino, test, v9fs_set_inode, st);
if (!inode)
return ERR_PTR(-ENOMEM);
if (!(inode->i_state & I_NEW))
@@ -504,7 +516,7 @@ error:
struct inode *
v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid,
- struct super_block *sb)
+ struct super_block *sb, int new)
{
struct p9_wstat *st;
struct inode *inode = NULL;
@@ -513,7 +525,7 @@ v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid,
if (IS_ERR(st))
return ERR_CAST(st);
- inode = v9fs_qid_iget(sb, &st->qid, st);
+ inode = v9fs_qid_iget(sb, &st->qid, st, new);
p9stat_free(st);
kfree(st);
return inode;
@@ -615,7 +627,7 @@ v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir,
}
/* instantiate inode and assign the unopened fid to the dentry */
- inode = v9fs_get_inode_from_fid(v9ses, fid, dir->i_sb);
+ inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
if (IS_ERR(inode)) {
err = PTR_ERR(inode);
P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", err);