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authorTrond Myklebust <Trond.Myklebust@netapp.com>2006-03-20 13:44:49 -0500
committerTrond Myklebust <Trond.Myklebust@netapp.com>2006-03-20 13:44:49 -0500
commit5428154827c2bf7cfdc9dab60db1e0eaa57c027a (patch)
treeec2e6c9119ad76cad353a50da2be3ac71adbf54d
parenta9a801787a761616589a6526d7a29c13f4deb3d8 (diff)
downloadop-kernel-dev-5428154827c2bf7cfdc9dab60db1e0eaa57c027a.zip
op-kernel-dev-5428154827c2bf7cfdc9dab60db1e0eaa57c027a.tar.gz
SUNRPC: Fix a 'Busy inodes' error in rpc_pipefs
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
-rw-r--r--include/linux/sunrpc/clnt.h1
-rw-r--r--include/linux/sunrpc/rpc_pipe_fs.h2
-rw-r--r--net/sunrpc/clnt.c24
-rw-r--r--net/sunrpc/rpc_pipe.c22
4 files changed, 35 insertions, 14 deletions
diff --git a/include/linux/sunrpc/clnt.h b/include/linux/sunrpc/clnt.h
index e37c061..8fe9f35 100644
--- a/include/linux/sunrpc/clnt.h
+++ b/include/linux/sunrpc/clnt.h
@@ -60,6 +60,7 @@ struct rpc_clnt {
int cl_nodelen; /* nodename length */
char cl_nodename[UNX_MAXNODENAME];
char cl_pathname[30];/* Path in rpc_pipe_fs */
+ struct vfsmount * cl_vfsmnt;
struct dentry * cl_dentry; /* inode */
struct rpc_clnt * cl_parent; /* Points to parent of clones */
struct rpc_rtt cl_rtt_default;
diff --git a/include/linux/sunrpc/rpc_pipe_fs.h b/include/linux/sunrpc/rpc_pipe_fs.h
index 6392934..2c2189c 100644
--- a/include/linux/sunrpc/rpc_pipe_fs.h
+++ b/include/linux/sunrpc/rpc_pipe_fs.h
@@ -45,6 +45,8 @@ extern struct dentry *rpc_mkdir(char *, struct rpc_clnt *);
extern int rpc_rmdir(char *);
extern struct dentry *rpc_mkpipe(char *, void *, struct rpc_pipe_ops *, int flags);
extern int rpc_unlink(char *);
+extern struct vfsmount *rpc_get_mount(void);
+extern void rpc_put_mount(void);
#endif
#endif
diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
index 0bb23e8..9f77530 100644
--- a/net/sunrpc/clnt.c
+++ b/net/sunrpc/clnt.c
@@ -70,8 +70,15 @@ rpc_setup_pipedir(struct rpc_clnt *clnt, char *dir_name)
static uint32_t clntid;
int error;
+ clnt->cl_vfsmnt = ERR_PTR(-ENOENT);
+ clnt->cl_dentry = ERR_PTR(-ENOENT);
if (dir_name == NULL)
return 0;
+
+ clnt->cl_vfsmnt = rpc_get_mount();
+ if (IS_ERR(clnt->cl_vfsmnt))
+ return PTR_ERR(clnt->cl_vfsmnt);
+
for (;;) {
snprintf(clnt->cl_pathname, sizeof(clnt->cl_pathname),
"%s/clnt%x", dir_name,
@@ -84,6 +91,7 @@ rpc_setup_pipedir(struct rpc_clnt *clnt, char *dir_name)
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;
}
}
@@ -175,7 +183,11 @@ rpc_new_client(struct rpc_xprt *xprt, char *servname,
return clnt;
out_no_auth:
- rpc_rmdir(clnt->cl_pathname);
+ if (!IS_ERR(clnt->cl_dentry)) {
+ rpc_rmdir(clnt->cl_pathname);
+ dput(clnt->cl_dentry);
+ rpc_put_mount();
+ }
out_no_path:
if (clnt->cl_server != clnt->cl_inline_name)
kfree(clnt->cl_server);
@@ -240,13 +252,15 @@ rpc_clone_client(struct rpc_clnt *clnt)
new->cl_autobind = 0;
new->cl_oneshot = 0;
new->cl_dead = 0;
- dget(new->cl_dentry);
+ if (!IS_ERR(new->cl_dentry)) {
+ dget(new->cl_dentry);
+ rpc_get_mount();
+ }
rpc_init_rtt(&new->cl_rtt_default, clnt->cl_xprt->timeout.to_initval);
if (new->cl_auth)
atomic_inc(&new->cl_auth->au_count);
new->cl_pmap = &new->cl_pmap_default;
new->cl_metrics = rpc_alloc_iostats(clnt);
- rpc_init_wait_queue(&new->cl_pmap_default.pm_bindwait, "bindwait");
return new;
out_no_clnt:
printk(KERN_INFO "RPC: out of memory in %s\n", __FUNCTION__);
@@ -318,8 +332,10 @@ rpc_destroy_client(struct rpc_clnt *clnt)
out_free:
rpc_free_iostats(clnt->cl_metrics);
clnt->cl_metrics = NULL;
- if (clnt->cl_dentry)
+ if (!IS_ERR(clnt->cl_dentry)) {
dput(clnt->cl_dentry);
+ rpc_put_mount();
+ }
kfree(clnt);
return 0;
}
diff --git a/net/sunrpc/rpc_pipe.c b/net/sunrpc/rpc_pipe.c
index 72b2217..391d2bf 100644
--- a/net/sunrpc/rpc_pipe.c
+++ b/net/sunrpc/rpc_pipe.c
@@ -435,14 +435,17 @@ static struct rpc_filelist authfiles[] = {
},
};
-static int
-rpc_get_mount(void)
+struct vfsmount *rpc_get_mount(void)
{
- return simple_pin_fs("rpc_pipefs", &rpc_mount, &rpc_mount_count);
+ int err;
+
+ err = simple_pin_fs("rpc_pipefs", &rpc_mount, &rpc_mount_count);
+ if (err != 0)
+ return ERR_PTR(err);
+ return rpc_mount;
}
-static void
-rpc_put_mount(void)
+void rpc_put_mount(void)
{
simple_release_fs(&rpc_mount, &rpc_mount_count);
}
@@ -452,12 +455,13 @@ rpc_lookup_parent(char *path, struct nameidata *nd)
{
if (path[0] == '\0')
return -ENOENT;
- if (rpc_get_mount()) {
+ nd->mnt = rpc_get_mount();
+ if (IS_ERR(nd->mnt)) {
printk(KERN_WARNING "%s: %s failed to mount "
"pseudofilesystem \n", __FILE__, __FUNCTION__);
- return -ENODEV;
+ return PTR_ERR(nd->mnt);
}
- nd->mnt = mntget(rpc_mount);
+ mntget(nd->mnt);
nd->dentry = dget(rpc_mount->mnt_root);
nd->last_type = LAST_ROOT;
nd->flags = LOOKUP_PARENT;
@@ -594,7 +598,6 @@ __rpc_mkdir(struct inode *dir, struct dentry *dentry)
d_instantiate(dentry, inode);
dir->i_nlink++;
inode_dir_notify(dir, DN_CREATE);
- rpc_get_mount();
return 0;
out_err:
printk(KERN_WARNING "%s: %s failed to allocate inode for dentry %s\n",
@@ -615,7 +618,6 @@ __rpc_rmdir(struct inode *dir, struct dentry *dentry)
if (!error) {
inode_dir_notify(dir, DN_DELETE);
d_drop(dentry);
- rpc_put_mount();
}
return 0;
}
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