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authorAl Viro <viro@zeniv.linux.org.uk>2011-06-26 11:54:58 -0400
committerAl Viro <viro@zeniv.linux.org.uk>2011-07-20 01:44:06 -0400
commit1ba106818615faddb63ba782f85f3498b9eb61c6 (patch)
tree45454702de65167453ebb873e8503456b2d0c640 /arch/powerpc/platforms
parentdae6ad8f37529963ae7df52baaccf056b38f210e (diff)
switch do_spufs_create() to user_path_create(), fix double-unlock
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'arch/powerpc/platforms')
-rw-r--r--arch/powerpc/platforms/cell/spufs/inode.c29
-rw-r--r--arch/powerpc/platforms/cell/spufs/spufs.h2
-rw-r--r--arch/powerpc/platforms/cell/spufs/syscalls.c22
3 files changed, 21 insertions, 32 deletions
diff --git a/arch/powerpc/platforms/cell/spufs/inode.c b/arch/powerpc/platforms/cell/spufs/inode.c
index 856e9c398068..e481f6b9a789 100644
--- a/arch/powerpc/platforms/cell/spufs/inode.c
+++ b/arch/powerpc/platforms/cell/spufs/inode.c
@@ -611,15 +611,14 @@ out:
static struct file_system_type spufs_type;
-long spufs_create(struct nameidata *nd, unsigned int flags, mode_t mode,
- struct file *filp)
+long spufs_create(struct path *path, struct dentry *dentry,
+ unsigned int flags, mode_t mode, struct file *filp)
{
- struct dentry *dentry;
int ret;
ret = -EINVAL;
/* check if we are on spufs */
- if (nd->path.dentry->d_sb->s_type != &spufs_type)
+ if (path->dentry->d_sb->s_type != &spufs_type)
goto out;
/* don't accept undefined flags */
@@ -627,33 +626,27 @@ long spufs_create(struct nameidata *nd, unsigned int flags, mode_t mode,
goto out;
/* only threads can be underneath a gang */
- if (nd->path.dentry != nd->path.dentry->d_sb->s_root) {
+ if (path->dentry != path->dentry->d_sb->s_root) {
if ((flags & SPU_CREATE_GANG) ||
- !SPUFS_I(nd->path.dentry->d_inode)->i_gang)
+ !SPUFS_I(path->dentry->d_inode)->i_gang)
goto out;
}
- dentry = lookup_create(nd, 1);
- ret = PTR_ERR(dentry);
- if (IS_ERR(dentry))
- goto out_dir;
-
mode &= ~current_umask();
if (flags & SPU_CREATE_GANG)
- ret = spufs_create_gang(nd->path.dentry->d_inode,
- dentry, nd->path.mnt, mode);
+ ret = spufs_create_gang(path->dentry->d_inode,
+ dentry, path->mnt, mode);
else
- ret = spufs_create_context(nd->path.dentry->d_inode,
- dentry, nd->path.mnt, flags, mode,
+ ret = spufs_create_context(path->dentry->d_inode,
+ dentry, path->mnt, flags, mode,
filp);
if (ret >= 0)
- fsnotify_mkdir(nd->path.dentry->d_inode, dentry);
+ fsnotify_mkdir(path->dentry->d_inode, dentry);
return ret;
-out_dir:
- mutex_unlock(&nd->path.dentry->d_inode->i_mutex);
out:
+ mutex_unlock(&path->dentry->d_inode->i_mutex);
return ret;
}
diff --git a/arch/powerpc/platforms/cell/spufs/spufs.h b/arch/powerpc/platforms/cell/spufs/spufs.h
index c448bac65518..099245f230b2 100644
--- a/arch/powerpc/platforms/cell/spufs/spufs.h
+++ b/arch/powerpc/platforms/cell/spufs/spufs.h
@@ -248,7 +248,7 @@ extern const struct spufs_tree_descr spufs_dir_debug_contents[];
/* system call implementation */
extern struct spufs_calls spufs_calls;
long spufs_run_spu(struct spu_context *ctx, u32 *npc, u32 *status);
-long spufs_create(struct nameidata *nd, unsigned int flags,
+long spufs_create(struct path *nd, struct dentry *dentry, unsigned int flags,
mode_t mode, struct file *filp);
/* ELF coredump callbacks for writing SPU ELF notes */
extern int spufs_coredump_extra_notes_size(void);
diff --git a/arch/powerpc/platforms/cell/spufs/syscalls.c b/arch/powerpc/platforms/cell/spufs/syscalls.c
index a3d2ce54ea2e..609e016e92d0 100644
--- a/arch/powerpc/platforms/cell/spufs/syscalls.c
+++ b/arch/powerpc/platforms/cell/spufs/syscalls.c
@@ -62,21 +62,17 @@ out:
static long do_spu_create(const char __user *pathname, unsigned int flags,
mode_t mode, struct file *neighbor)
{
- char *tmp;
+ struct path path;
+ struct dentry *dentry;
int ret;
- tmp = getname(pathname);
- ret = PTR_ERR(tmp);
- if (!IS_ERR(tmp)) {
- struct nameidata nd;
-
- ret = kern_path_parent(tmp, &nd);
- if (!ret) {
- nd.flags |= LOOKUP_OPEN | LOOKUP_CREATE;
- ret = spufs_create(&nd, flags, mode, neighbor);
- path_put(&nd.path);
- }
- putname(tmp);
+ dentry = user_path_create(AT_FDCWD, pathname, &path, 1);
+ ret = PTR_ERR(dentry);
+ if (!IS_ERR(dentry)) {
+ ret = spufs_create(&path, dentry, flags, mode, neighbor);
+ mutex_unlock(&path.dentry->d_inode->i_mutex);
+ dput(dentry);
+ path_put(&path);
}
return ret;

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