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SUNRPC: clean up rpc_setup_pipedir() 

There is still a little wart or two there: Since we've already got a
vfsmount, we might as well pass that in to rpc_create_client_dir.
Another point is that if we open code __rpc_lookup_path() here, then we can
avoid looking up the entire parent directory path over and over again: it
doesn't change.

Also get rid of rpc_clnt->cl_pathname, since it has no users...

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Trond Myklebust 2009-08-09 15:14:25 -04:00
parent 7d217caca5
commit 23ac658170
4 changed files with 37 additions and 72 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
include/linux/sunrpc/clnt.h
View File

@ -51,7 +51,6 @@ struct rpc_clnt {
int cl_nodelen; /* nodename length */
char cl_nodename[UNX_MAXNODENAME];
char cl_pathname[30];/* Path in rpc_pipe_fs */
struct path cl_path;
struct rpc_clnt * cl_parent; /* Points to parent of clones */
struct rpc_rtt cl_rtt_default;

2
include/linux/sunrpc/rpc_pipe_fs.h
View File

@ -45,7 +45,7 @@ RPC_I(struct inode *inode)
extern int rpc_queue_upcall(struct inode *, struct rpc_pipe_msg *);
struct rpc_clnt;
extern struct dentry *rpc_create_client_dir(const char *, struct rpc_clnt *);
extern struct dentry *rpc_create_client_dir(struct dentry *, struct qstr *, struct rpc_clnt *);
extern int rpc_remove_client_dir(struct dentry *);
extern struct dentry *rpc_mkpipe(struct dentry *, const char *, void *,
const struct rpc_pipe_ops *, int flags);

48
net/sunrpc/clnt.c
View File

@ -27,6 +27,8 @@
#include <linux/types.h>
#include <linux/kallsyms.h>
#include <linux/mm.h>
#include <linux/namei.h>
#include <linux/mount.h>
#include <linux/slab.h>
#include <linux/utsname.h>
#include <linux/workqueue.h>
@ -97,6 +99,12 @@ static int
rpc_setup_pipedir(struct rpc_clnt *clnt, char *dir_name)
{
static uint32_t clntid;
struct nameidata nd;
struct path path;
char name[15];
struct qstr q = {
.name = name,
};
int error;
clnt->cl_path.mnt = ERR_PTR(-ENOENT);
@ -104,26 +112,36 @@ rpc_setup_pipedir(struct rpc_clnt *clnt, char *dir_name)
if (dir_name == NULL)
return 0;
clnt->cl_path.mnt = rpc_get_mount();
if (IS_ERR(clnt->cl_path.mnt))
return PTR_ERR(clnt->cl_path.mnt);
path.mnt = rpc_get_mount();
if (IS_ERR(path.mnt))
return PTR_ERR(path.mnt);
error = vfs_path_lookup(path.mnt->mnt_root, path.mnt, dir_name, 0, &nd);
if (error)
goto err;
for (;;) {
snprintf(clnt->cl_pathname, sizeof(clnt->cl_pathname),
"%s/clnt%x", dir_name,
(unsigned int)clntid++);
clnt->cl_pathname[sizeof(clnt->cl_pathname) - 1] = '\0';
clnt->cl_path.dentry = rpc_create_client_dir(clnt->cl_pathname, clnt);
if (!IS_ERR(clnt->cl_path.dentry))
return 0;
error = PTR_ERR(clnt->cl_path.dentry);
q.len = snprintf(name, sizeof(name), "clnt%x", (unsigned int)clntid++);
name[sizeof(name) - 1] = '\0';
q.hash = full_name_hash(q.name, q.len);
path.dentry = rpc_create_client_dir(nd.path.dentry, &q, clnt);
if (!IS_ERR(path.dentry))
break;
error = PTR_ERR(path.dentry);
if (error != -EEXIST) {
printk(KERN_INFO "RPC: Couldn't create pipefs entry %s, error %d\n",
clnt->cl_pathname, error);
rpc_put_mount();
return error;
printk(KERN_INFO "RPC: Couldn't create pipefs entry"
" %s/%s, error %d\n",
dir_name, name, error);
goto err_path_put;
}
}
path_put(&nd.path);
clnt->cl_path = path;
return 0;
err_path_put:
path_put(&nd.path);
err:
rpc_put_mount();
return error;
}
static struct rpc_clnt * rpc_new_client(const struct rpc_create_args *args, struct rpc_xprt *xprt)

58
net/sunrpc/rpc_pipe.c
View File

@ -443,42 +443,6 @@ static const struct dentry_operations rpc_dentry_operations = {
.d_delete = rpc_delete_dentry,
};
static int __rpc_lookup_path(const char *pathname, unsigned flags,
struct nameidata *nd)
{
struct vfsmount *mnt;
if (pathname[0] == '\0')
return -ENOENT;
mnt = rpc_get_mount();
if (IS_ERR(mnt)) {
printk(KERN_WARNING "%s: %s failed to mount "
"pseudofilesystem \n", __FILE__, __func__);
return PTR_ERR(mnt);
}
if (vfs_path_lookup(mnt->mnt_root, mnt, pathname, flags, nd)) {
printk(KERN_WARNING "%s: %s failed to find path %s\n",
__FILE__, __func__, pathname);
rpc_put_mount();
return -ENOENT;
}
return 0;
}
static int rpc_lookup_parent(const char *pathname, struct nameidata *nd)
{
return __rpc_lookup_path(pathname, LOOKUP_PARENT, nd);
}
static void
rpc_release_path(struct nameidata *nd)
{
path_put(&nd->path);
rpc_put_mount();
}
static struct inode *
rpc_get_inode(struct super_block *sb, umode_t mode)
{
@ -889,27 +853,11 @@ EXPORT_SYMBOL_GPL(rpc_unlink);
* 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 dentry *rpc_create_client_dir(struct dentry *dentry,
struct qstr *name,
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;
return rpc_mkdir_populate(dentry, name, S_IRUGO | S_IXUGO, rpc_client);
}
/*