[PATCH 10/32] SUNRPC: Clean up file creation code in rpc_pipefs

Trond Myklebust
2009-08-19T23:40:56Z

net/sunrpc/rpc_pipe.c | 120 +++++++++++++++++++++++++++++++-----------------
1 files changed, 77 insertions(+), 43 deletions(-)

diff --git a/net/sunrpc/rpc_pipe.c b/net/sunrpc/rpc_pipe.c
index 2940b92..d8c7815 100644
--- a/net/sunrpc/rpc_pipe.c
+++ b/net/sunrpc/rpc_pipe.c
@@ -539,6 +539,68 @@ rpc_get_inode(struct super_block *sb, umode_t mode)
return inode;
}

+static int __rpc_create_common(struct inode *dir, struct dentry *dentry,
+ umode_t mode,
+ const struct file_operations *i_fop,
+ void *private)
+{
+ struct inode *inode;
+
+ BUG_ON(!d_unhashed(dentry));
+ inode = rpc_get_inode(dir->i_sb, mode);
+ if (!inode)
+ goto out_err;
+ inode->i_ino = iunique(dir->i_sb, 100);
+ if (i_fop)
+ inode->i_fop = i_fop;
+ if (private)
+ rpc_inode_setowner(inode, private);
+ d_add(dentry, inode);
+ return 0;
+out_err:
+ printk(KERN_WARNING "%s: %s failed to allocate inode for dentry %s\n",
+ __FILE__, __func__, dentry->d_name.name);
+ dput(dentry);
+ return -ENOMEM;
+}
+
+static int __rpc_mkdir(struct inode *dir, struct dentry *dentry,
+ umode_t mode,
+ const struct file_operations *i_fop,
+ void *private)
+{
+ int err;
+
+ err = __rpc_create_common(dir, dentry, S_IFDIR | mode, i_fop, private);
+ if (err)
+ return err;
+ inc_nlink(dir);
+ fsnotify_mkdir(dir, dentry);
+ return 0;
+}
+
+static int __rpc_mkpipe(struct inode *dir, struct dentry *dentry,
+ umode_t mode,
+ const struct file_operations *i_fop,
+ void *private,
+ const struct rpc_pipe_ops *ops,
+ int flags)
+{
+ struct rpc_inode *rpci;
+ int err;
+
+ err = __rpc_create_common(dir, dentry, S_IFIFO | mode, i_fop, private);
+ if (err)
+ return err;
+ rpci = RPC_I(dentry->d_inode);
+ rpci->nkern_readwriters = 1;
+ rpci->private = private;
+ rpci->flags = flags;
+ rpci->ops = ops;
+ fsnotify_create(dir, dentry);
+ return 0;
+}
+
/*
* FIXME: This probably has races.
*/
@@ -629,25 +691,6 @@ out_bad:
}

static int
-__rpc_mkdir(struct inode *dir, struct dentry *dentry)
-{
- struct inode *inode;
-
- inode = rpc_get_inode(dir->i_sb, S_IFDIR | S_IRUGO | S_IXUGO);
- if (!inode)
- goto out_err;
- inode->i_ino = iunique(dir->i_sb, 100);
- d_instantiate(dentry, inode);
- inc_nlink(dir);
- fsnotify_mkdir(dir, dentry);
- return 0;
-out_err:
- printk(KERN_WARNING "%s: %s failed to allocate inode for dentry %s\n",
- __FILE__, __func__, dentry->d_name.name);
- return -ENOMEM;
-}
-
-static int
__rpc_rmdir(struct inode *dir, struct dentry *dentry)
{
int error;
@@ -717,9 +760,9 @@ rpc_mkdir(char *path, struct rpc_clnt *rpc_client)
if (IS_ERR(dentry))
return dentry;
dir = nd.path.dentry->d_inode;
- if ((error = __rpc_mkdir(dir, dentry)) != 0)
- goto err_dput;
- RPC_I(dentry->d_inode)->private = rpc_client;
+ error = __rpc_mkdir(dir, dentry, S_IRUGO | S_IXUGO, NULL, rpc_client);
+ if (error != 0)
+ goto out_err;
error = rpc_populate(dentry, authfiles,
RPCAUTH_info, RPCAUTH_EOF);
if (error)
@@ -732,8 +775,7 @@ out:
err_depopulate:
rpc_depopulate(dentry, RPCAUTH_info, RPCAUTH_EOF);
__rpc_rmdir(dir, dentry);
-err_dput:
- dput(dentry);
+out_err:
printk(KERN_WARNING "%s: %s() failed to create directory %s (errno = %d)\n",
__FILE__, __func__, path, error);
dentry = ERR_PTR(error);
@@ -787,9 +829,9 @@ struct dentry *rpc_mkpipe(struct dentry *parent, const char *name,
int flags)
{
struct dentry *dentry;
- struct inode *dir, *inode;
- struct rpc_inode *rpci;
+ struct inode *dir = parent->d_inode;
umode_t umode = S_IFIFO | S_IRUSR | S_IWUSR;
+ int err;

if (ops->upcall == NULL)
umode &= ~S_IRUGO;
@@ -801,7 +843,7 @@ struct dentry *rpc_mkpipe(struct dentry *parent, const char *name,
return dentry;
dir = parent->d_inode;
if (dentry->d_inode) {
- rpci = RPC_I(dentry->d_inode);
+ struct rpc_inode *rpci = RPC_I(dentry->d_inode);
if (rpci->private != private ||
rpci->ops != ops ||
rpci->flags != flags) {
@@ -811,28 +853,20 @@ struct dentry *rpc_mkpipe(struct dentry *parent, const char *name,
rpci->nkern_readwriters++;
goto out;
}
- inode = rpc_get_inode(dir->i_sb, umode);
- if (!inode)
- goto err_dput;
- inode->i_ino = iunique(dir->i_sb, 100);
- inode->i_fop = &rpc_pipe_fops;
- d_instantiate(dentry, inode);
- rpci = RPC_I(inode);
- rpci->private = private;
- rpci->flags = flags;
- rpci->ops = ops;
- rpci->nkern_readwriters = 1;
- fsnotify_create(dir, dentry);
+
+ err = __rpc_mkpipe(dir, dentry, umode, &rpc_pipe_fops,
+ private, ops, flags);
+ if (err)
+ goto out_err;
dget(dentry);
out:
mutex_unlock(&dir->i_mutex);
return dentry;
-err_dput:
- dput(dentry);
- dentry = ERR_PTR(-ENOMEM);
+out_err:
+ dentry = ERR_PTR(err);
printk(KERN_WARNING "%s: %s() failed to create pipe %s/%s (errno = %d)\n",
__FILE__, __func__, parent->d_name.name, name,
- -ENOMEM);
+ err);
goto out;
}
EXPORT_SYMBOL_GPL(rpc_mkpipe);
--
1.6.0.4