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SUNRPC: Clean up rpc_create_client_dir() 

Factor out the code that does lookups from the code that actually creates
the directory.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Trond Myklebust 2009-08-09 15:14:23 -04:00
parent 458adb8ba9
commit 7d59d1e865
1 changed files with 41 additions and 42 deletions
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83
net/sunrpc/rpc_pipe.c
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@ -639,26 +639,6 @@ static struct dentry *__rpc_lookup_create_exclusive(struct dentry *parent,
return ERR_PTR(-EEXIST); return ERR_PTR(-EEXIST);
} }
static struct dentry *rpc_lookup_negative(const char *path,
struct nameidata *nd)
{
struct inode *dir;
struct dentry *dentry;
int error;
error = rpc_lookup_parent(path, nd);
if (error != 0)
return ERR_PTR(error);
dir = nd->path.dentry->d_inode;
mutex_lock_nested(&dir->i_mutex, I_MUTEX_PARENT);
dentry = __rpc_lookup_create_exclusive(nd->path.dentry, &nd->last);
if (IS_ERR(dentry)) {
mutex_unlock(&dir->i_mutex);
rpc_release_path(nd);
}
return dentry;
}
/* /*
* FIXME: This probably has races. * FIXME: This probably has races.
*/ */
@ -754,44 +734,30 @@ out_bad:
return err; return err;
} }
/** struct dentry *rpc_mkdir_populate(struct dentry *parent,
* rpc_create_client_dir - Create a new rpc_client directory in rpc_pipefs struct qstr *name, umode_t mode, void *private)
* @path: path from the rpc_pipefs root to the new directory
* @rpc_client: rpc client to associate with this directory
*
* This creates a directory at the given @path associated with
* @rpc_clnt, which will contain a file named "info" with some basic
* information about the client, together with any "pipes" that may
* later be created using rpc_mkpipe().
*/
struct dentry *rpc_create_client_dir(const char *path,
struct rpc_clnt *rpc_client)
{ {
struct nameidata nd;
struct dentry *dentry; struct dentry *dentry;
struct inode *dir; struct inode *dir = parent->d_inode;
int error; int error;
dentry = rpc_lookup_negative(path, &nd); mutex_lock_nested(&dir->i_mutex, I_MUTEX_PARENT);
dentry = __rpc_lookup_create_exclusive(parent, name);
if (IS_ERR(dentry)) if (IS_ERR(dentry))
return dentry; goto out;
dir = nd.path.dentry->d_inode; error = __rpc_mkdir(dir, dentry, mode, NULL, private);
error = __rpc_mkdir(dir, dentry, S_IRUGO | S_IXUGO, NULL, rpc_client);
if (error != 0) if (error != 0)
goto out_err; goto out_err;
error = rpc_populate(dentry, authfiles, error = rpc_populate(dentry, authfiles,
RPCAUTH_info, RPCAUTH_EOF, rpc_client); RPCAUTH_info, RPCAUTH_EOF, private);
if (error) if (error)
goto err_rmdir; goto err_rmdir;
out: out:
mutex_unlock(&dir->i_mutex); mutex_unlock(&dir->i_mutex);
rpc_release_path(&nd);
return dentry; return dentry;
err_rmdir: err_rmdir:
__rpc_rmdir(dir, dentry); __rpc_rmdir(dir, dentry);
out_err: out_err:
printk(KERN_WARNING "%s: %s() failed to create directory %s (errno = %d)\n",
__FILE__, __func__, path, error);
dentry = ERR_PTR(error); dentry = ERR_PTR(error);
goto out; goto out;
} }
@ -913,6 +879,39 @@ rpc_unlink(struct dentry *dentry)
} }
EXPORT_SYMBOL_GPL(rpc_unlink); EXPORT_SYMBOL_GPL(rpc_unlink);
/**
* rpc_create_client_dir - Create a new rpc_client directory in rpc_pipefs
* @path: path from the rpc_pipefs root to the new directory
* @rpc_client: rpc client to associate with this directory
*
* This creates a directory at the given @path associated with
* @rpc_clnt, which will contain a file named "info" with some basic
* information about the client, together with any "pipes" that may
* later be created using rpc_mkpipe().
*/
struct dentry *rpc_create_client_dir(const char *path,
struct rpc_clnt *rpc_client)
{
struct nameidata nd;
struct dentry *ret;
struct inode *dir;
ret = ERR_PTR(rpc_lookup_parent(path, &nd));
if (IS_ERR(ret))
goto out_err;
dir = nd.path.dentry->d_inode;
ret = rpc_mkdir_populate(nd.path.dentry, &nd.last,
S_IRUGO | S_IXUGO, rpc_client);
rpc_release_path(&nd);
if (!IS_ERR(ret))
return ret;
out_err:
printk(KERN_WARNING "%s: %s() failed to create directory %s (errno = %ld)\n",
__FILE__, __func__, path, PTR_ERR(ret));
return ret;
}
/* /*
* populate the filesystem * populate the filesystem
*/ */