diff options
| -rw-r--r-- | fs/nfs/idmap.c | 10 | ||||
| -rw-r--r-- | include/linux/sunrpc/clnt.h | 2 | ||||
| -rw-r--r-- | include/linux/sunrpc/rpc_pipe_fs.h | 9 | ||||
| -rw-r--r-- | net/sunrpc/auth_gss/auth_gss.c | 9 | ||||
| -rw-r--r-- | net/sunrpc/clnt.c | 53 | ||||
| -rw-r--r-- | net/sunrpc/rpc_pipe.c | 268 |
6 files changed, 209 insertions, 142 deletions
diff --git a/fs/nfs/idmap.c b/fs/nfs/idmap.c index 1d0a5bf0d264..ffb8df91dc34 100644 --- a/fs/nfs/idmap.c +++ b/fs/nfs/idmap.c @@ -66,6 +66,7 @@ struct idmap_hashtable { }; struct idmap { + char idmap_path[48]; struct dentry *idmap_dentry; wait_queue_head_t idmap_wq; struct idmap_msg idmap_im; @@ -101,8 +102,11 @@ nfs_idmap_new(struct nfs4_client *clp) memset(idmap, 0, sizeof(*idmap)); - idmap->idmap_dentry = rpc_mkpipe(clp->cl_rpcclient->cl_dentry, - "idmap", idmap, &idmap_upcall_ops, 0); + snprintf(idmap->idmap_path, sizeof(idmap->idmap_path), + "%s/idmap", clp->cl_rpcclient->cl_pathname); + + idmap->idmap_dentry = rpc_mkpipe(idmap->idmap_path, + idmap, &idmap_upcall_ops, 0); if (IS_ERR(idmap->idmap_dentry)) { kfree(idmap); return; @@ -124,7 +128,7 @@ nfs_idmap_delete(struct nfs4_client *clp) if (!idmap) return; - rpc_unlink(idmap->idmap_dentry); + rpc_unlink(idmap->idmap_path); clp->cl_idmap = NULL; kfree(idmap); } diff --git a/include/linux/sunrpc/clnt.h b/include/linux/sunrpc/clnt.h index b5b51c196690..ab151bbb66df 100644 --- a/include/linux/sunrpc/clnt.h +++ b/include/linux/sunrpc/clnt.h @@ -59,7 +59,7 @@ struct rpc_clnt { int cl_nodelen; /* nodename length */ char cl_nodename[UNX_MAXNODENAME]; - struct dentry * __cl_parent_dentry; + char cl_pathname[30];/* Path in rpc_pipe_fs */ 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 63878d05c9a9..63929349571f 100644 --- a/include/linux/sunrpc/rpc_pipe_fs.h +++ b/include/linux/sunrpc/rpc_pipe_fs.h @@ -41,11 +41,10 @@ RPC_I(struct inode *inode) extern int rpc_queue_upcall(struct inode *, struct rpc_pipe_msg *); -extern struct dentry *rpc_mkdir(struct dentry *, char *, struct rpc_clnt *); -extern void rpc_rmdir(struct dentry *); -extern struct dentry *rpc_mkpipe(struct dentry *, char *, void *, - struct rpc_pipe_ops *, int flags); -extern void rpc_unlink(struct dentry *); +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 *); #endif #endif diff --git a/net/sunrpc/auth_gss/auth_gss.c b/net/sunrpc/auth_gss/auth_gss.c index bd2555139fa9..d2b08f16c257 100644 --- a/net/sunrpc/auth_gss/auth_gss.c +++ b/net/sunrpc/auth_gss/auth_gss.c @@ -87,6 +87,7 @@ struct gss_auth { struct list_head upcalls; struct rpc_clnt *client; struct dentry *dentry; + char path[48]; spinlock_t lock; }; @@ -689,8 +690,10 @@ gss_create(struct rpc_clnt *clnt, rpc_authflavor_t flavor) if (err) goto err_put_mech; - gss_auth->dentry = rpc_mkpipe(clnt->cl_dentry, gss_auth->mech->gm_name, - clnt, &gss_upcall_ops, RPC_PIPE_WAIT_FOR_OPEN); + snprintf(gss_auth->path, sizeof(gss_auth->path), "%s/%s", + clnt->cl_pathname, + gss_auth->mech->gm_name); + gss_auth->dentry = rpc_mkpipe(gss_auth->path, clnt, &gss_upcall_ops, RPC_PIPE_WAIT_FOR_OPEN); if (IS_ERR(gss_auth->dentry)) { err = PTR_ERR(gss_auth->dentry); goto err_put_mech; @@ -715,7 +718,7 @@ gss_destroy(struct rpc_auth *auth) auth, auth->au_flavor); gss_auth = container_of(auth, struct gss_auth, rpc_auth); - rpc_unlink(gss_auth->dentry); + rpc_unlink(gss_auth->path); gss_mech_put(gss_auth->mech); rpcauth_free_credcache(auth); diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c index 63bf591310e0..5a8f01d726e9 100644 --- a/net/sunrpc/clnt.c +++ b/net/sunrpc/clnt.c @@ -67,42 +67,26 @@ static u32 * call_verify(struct rpc_task *task); static int rpc_setup_pipedir(struct rpc_clnt *clnt, char *dir_name) { - static unsigned int clntid; - char name[128]; + static uint32_t clntid; int error; if (dir_name == NULL) return 0; - - retry_parent: - clnt->__cl_parent_dentry = rpc_mkdir(NULL, dir_name, NULL); - if (IS_ERR(clnt->__cl_parent_dentry)) { - error = PTR_ERR(clnt->__cl_parent_dentry); - if (error == -EEXIST) - goto retry_parent; /* XXX(hch): WTF? */ - - printk(KERN_INFO "RPC: Couldn't create pipefs entry %s, error %d\n", - dir_name, error); - return error; - } - - - retry_child: - snprintf(name, sizeof(name), "clnt%x", clntid++); - name[sizeof(name) - 1] = '\0'; - - clnt->cl_dentry = rpc_mkdir(clnt->__cl_parent_dentry, name, clnt); - if (IS_ERR(clnt->cl_dentry)) { + 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_dentry = rpc_mkdir(clnt->cl_pathname, clnt); + if (!IS_ERR(clnt->cl_dentry)) + return 0; error = PTR_ERR(clnt->cl_dentry); - if (error == -EEXIST) - goto retry_child; - printk(KERN_INFO "RPC: Couldn't create pipefs entry %s, error %d\n", - name, error); - rpc_rmdir(clnt->__cl_parent_dentry); - return error; + if (error != -EEXIST) { + printk(KERN_INFO "RPC: Couldn't create pipefs entry %s, error %d\n", + clnt->cl_pathname, error); + return error; + } } - - return 0; } /* @@ -190,8 +174,7 @@ rpc_new_client(struct rpc_xprt *xprt, char *servname, return clnt; out_no_auth: - rpc_rmdir(clnt->cl_dentry); - rpc_rmdir(clnt->__cl_parent_dentry); + rpc_rmdir(clnt->cl_pathname); out_no_path: if (clnt->cl_server != clnt->cl_inline_name) kfree(clnt->cl_server); @@ -319,10 +302,8 @@ rpc_destroy_client(struct rpc_clnt *clnt) rpc_destroy_client(clnt->cl_parent); goto out_free; } - if (clnt->cl_dentry) - rpc_rmdir(clnt->cl_dentry); - if (clnt->__cl_parent_dentry) - rpc_rmdir(clnt->__cl_parent_dentry); + if (clnt->cl_pathname[0]) + rpc_rmdir(clnt->cl_pathname); if (clnt->cl_xprt) { xprt_destroy(clnt->cl_xprt); clnt->cl_xprt = NULL; diff --git a/net/sunrpc/rpc_pipe.c b/net/sunrpc/rpc_pipe.c index b382809726d8..ded6c63f11ec 100644 --- a/net/sunrpc/rpc_pipe.c +++ b/net/sunrpc/rpc_pipe.c @@ -414,6 +414,38 @@ rpc_put_mount(void) simple_release_fs(&rpc_mount, &rpc_mount_count); } +static int +rpc_lookup_parent(char *path, struct nameidata *nd) +{ + if (path[0] == '\0') + return -ENOENT; + if (rpc_get_mount()) { + printk(KERN_WARNING "%s: %s failed to mount " + "pseudofilesystem \n", __FILE__, __FUNCTION__); + return -ENODEV; + } + nd->mnt = mntget(rpc_mount); + nd->dentry = dget(rpc_mount->mnt_root); + nd->last_type = LAST_ROOT; + nd->flags = LOOKUP_PARENT; + nd->depth = 0; + + if (path_walk(path, nd)) { + printk(KERN_WARNING "%s: %s failed to find path %s\n", + __FILE__, __FUNCTION__, path); + rpc_put_mount(); + return -ENOENT; + } + return 0; +} + +static void +rpc_release_path(struct nameidata *nd) +{ + path_release(nd); + rpc_put_mount(); +} + static struct inode * rpc_get_inode(struct super_block *sb, int mode) { @@ -518,149 +550,197 @@ out_bad: return -ENOMEM; } -struct dentry * -rpc_mkdir(struct dentry *parent, char *name, struct rpc_clnt *rpc_client) +static int +__rpc_mkdir(struct inode *dir, struct dentry *dentry) { - struct inode *dir; - struct dentry *dentry; struct inode *inode; + + inode = rpc_get_inode(dir->i_sb, S_IFDIR | S_IRUSR | S_IXUSR); + if (!inode) + goto out_err; + inode->i_ino = iunique(dir->i_sb, 100); + 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", + __FILE__, __FUNCTION__, dentry->d_name.name); + return -ENOMEM; +} + +static int +__rpc_rmdir(struct inode *dir, struct dentry *dentry) +{ int error; - if (!parent) - parent = rpc_mount->mnt_root; + shrink_dcache_parent(dentry); + if (dentry->d_inode) { + rpc_close_pipes(dentry->d_inode); + rpc_inode_setowner(dentry->d_inode, NULL); + } + if ((error = simple_rmdir(dir, dentry)) != 0) + return error; + if (!error) { + inode_dir_notify(dir, DN_DELETE); + d_drop(dentry); + rpc_put_mount(); + } + return 0; +} - dir = parent->d_inode; - - error = rpc_get_mount(); - if (error) - return ERR_PTR(error); +static struct dentry * +rpc_lookup_negative(char *path, struct nameidata *nd) +{ + struct dentry *dentry; + struct inode *dir; + int error; + if ((error = rpc_lookup_parent(path, nd)) != 0) + return ERR_PTR(error); + dir = nd->dentry->d_inode; down(&dir->i_sem); - dentry = lookup_one_len(name, parent, strlen(name)); + dentry = lookup_hash(&nd->last, nd->dentry); if (IS_ERR(dentry)) - goto out_unlock; + goto out_err; if (dentry->d_inode) { + dput(dentry); dentry = ERR_PTR(-EEXIST); - goto out_dput; + goto out_err; } - - inode = rpc_get_inode(dir->i_sb, S_IFDIR | S_IRUSR | S_IXUSR); - if (!inode) - goto out_dput; - inode->i_ino = iunique(dir->i_sb, 100); - dir->i_nlink++; - RPC_I(dentry->d_inode)->private = rpc_client; - - d_instantiate(dentry, inode); - dget(dentry); + return dentry; +out_err: up(&dir->i_sem); + rpc_release_path(nd); + return dentry; +} - inode_dir_notify(dir, DN_CREATE); +struct dentry * +rpc_mkdir(char *path, struct rpc_clnt *rpc_client) +{ + struct nameidata nd; + struct dentry *dentry; + struct inode *dir; + int error; + + dentry = rpc_lookup_negative(path, &nd); + if (IS_ERR(dentry)) + return dentry; + dir = nd.dentry->d_inode; + if ((error = __rpc_mkdir(dir, dentry)) != 0) + goto err_dput; + RPC_I(dentry->d_inode)->private = rpc_client; error = rpc_populate(dentry, authfiles, RPCAUTH_info, RPCAUTH_EOF); if (error) - goto out_depopulate; - - return dentry; - - out_depopulate: - rpc_rmdir(dentry); - out_dput: - dput(dentry); - out_unlock: + goto err_depopulate; +out: up(&dir->i_sem); - rpc_put_mount(); + rpc_release_path(&nd); return dentry; +err_depopulate: + rpc_depopulate(dentry); + __rpc_rmdir(dir, dentry); +err_dput: + dput(dentry); + printk(KERN_WARNING "%s: %s() failed to create directory %s (errno = %d)\n", + __FILE__, __FUNCTION__, path, error); + dentry = ERR_PTR(error); + goto out; } -void -rpc_rmdir(struct dentry *dentry) +int +rpc_rmdir(char *path) { - struct dentry *parent = dentry->d_parent; - - rpc_depopulate(dentry); + struct nameidata nd; + struct dentry *dentry; + struct inode *dir; + int error; - down(&parent->d_inode->i_sem); - if (dentry->d_inode) { - rpc_close_pipes(dentry->d_inode); - rpc_inode_setowner(dentry->d_inode, NULL); - simple_rmdir(parent->d_inode, dentry); + if ((error = rpc_lookup_parent(path, &nd)) != 0) + return error; + dir = nd.dentry->d_inode; + down(&dir->i_sem); + dentry = lookup_hash(&nd.last, nd.dentry); + if (IS_ERR(dentry)) { + error = PTR_ERR(dentry); + goto out_release; } - up(&parent->d_inode->i_sem); - - inode_dir_notify(parent->d_inode, DN_DELETE); - rpc_put_mount(); + rpc_depopulate(dentry); + error = __rpc_rmdir(dir, dentry); + dput(dentry); +out_release: + up(&dir->i_sem); + rpc_release_path(&nd); + return error; } struct dentry * -rpc_mkpipe(struct dentry *parent, char *name, void *private, - struct rpc_pipe_ops *ops, int flags) +rpc_mkpipe(char *path, void *private, struct rpc_pipe_ops *ops, int flags) { - struct inode *dir = parent->d_inode; + struct nameidata nd; struct dentry *dentry; - struct inode *inode; + struct inode *dir, *inode; struct rpc_inode *rpci; - int error; - - error = rpc_get_mount(); - if (error) - return ERR_PTR(error); - down(&parent->d_inode->i_sem); - dentry = lookup_one_len(name, parent, strlen(name)); + dentry = rpc_lookup_negative(path, &nd); if (IS_ERR(dentry)) - goto out_unlock; - if (dentry->d_inode) { - dentry = ERR_PTR(-EEXIST); - goto out_dput; - } - - inode = rpc_get_inode(parent->d_inode->i_sb, - S_IFSOCK | S_IRUSR | S_IWUSR); - if (!inode) { - dentry = ERR_PTR(-ENOMEM); - goto out_dput; - } - + return dentry; + dir = nd.dentry->d_inode; + inode = rpc_get_inode(dir->i_sb, S_IFSOCK | S_IRUSR | S_IWUSR); + 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; - - d_instantiate(dentry, inode); - dget(dentry); - up(&parent->d_inode->i_sem); - inode_dir_notify(dir, DN_CREATE); +out: + up(&dir->i_sem); + rpc_release_path(&nd); return dentry; - - out_dput: +err_dput: dput(dentry); - out_unlock: - up(&parent->d_inode->i_sem); - rpc_put_mount(); - return dentry; + dentry = ERR_PTR(-ENOMEM); + printk(KERN_WARNING "%s: %s() failed to create pipe %s (errno = %d)\n", + __FILE__, __FUNCTION__, path, -ENOMEM); + goto out; } -void -rpc_unlink(struct dentry *dentry) +int +rpc_unlink(char *path) { - struct dentry *parent = dentry->d_parent; + struct nameidata nd; + struct dentry *dentry; + struct inode *dir; + int error; - down(&parent->d_inode->i_sem); + if ((error = rpc_lookup_parent(path, &nd)) != 0) + return error; + dir = nd.dentry->d_inode; + down(&dir->i_sem); + dentry = lookup_hash(&nd.last, nd.dentry); + if (IS_ERR(dentry)) { + error = PTR_ERR(dentry); + goto out_release; + } + d_drop(dentry); if (dentry->d_inode) { rpc_close_pipes(dentry->d_inode); rpc_inode_setowner(dentry->d_inode, NULL); - simple_unlink(parent->d_inode, dentry); + error = simple_unlink(dir, dentry); } - up(&parent->d_inode->i_sem); - - inode_dir_notify(parent->d_inode, DN_DELETE); - rpc_put_mount(); + dput(dentry); + inode_dir_notify(dir, DN_DELETE); +out_release: + up(&dir->i_sem); + rpc_release_path(&nd); + return error; } /* |