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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * net/sunrpc/rpc_pipe.c | |
3 | * | |
4 | * Userland/kernel interface for rpcauth_gss. | |
5 | * Code shamelessly plagiarized from fs/nfsd/nfsctl.c | |
d51fe1be | 6 | * and fs/sysfs/inode.c |
1da177e4 LT |
7 | * |
8 | * Copyright (c) 2002, Trond Myklebust <trond.myklebust@fys.uio.no> | |
9 | * | |
10 | */ | |
1da177e4 LT |
11 | #include <linux/module.h> |
12 | #include <linux/slab.h> | |
13 | #include <linux/string.h> | |
14 | #include <linux/pagemap.h> | |
15 | #include <linux/mount.h> | |
16 | #include <linux/namei.h> | |
50e437d5 | 17 | #include <linux/fsnotify.h> |
1da177e4 | 18 | #include <linux/kernel.h> |
2446ab60 | 19 | #include <linux/rcupdate.h> |
1da177e4 LT |
20 | |
21 | #include <asm/ioctls.h> | |
1da177e4 LT |
22 | #include <linux/poll.h> |
23 | #include <linux/wait.h> | |
24 | #include <linux/seq_file.h> | |
25 | ||
26 | #include <linux/sunrpc/clnt.h> | |
27 | #include <linux/workqueue.h> | |
28 | #include <linux/sunrpc/rpc_pipe_fs.h> | |
8854e82d | 29 | #include <linux/sunrpc/cache.h> |
021c68de | 30 | #include <linux/nsproxy.h> |
2d00131a | 31 | #include <linux/notifier.h> |
1da177e4 | 32 | |
021c68de | 33 | #include "netns.h" |
2d00131a | 34 | #include "sunrpc.h" |
1da177e4 | 35 | |
efc46bf2 SK |
36 | #define RPCDBG_FACILITY RPCDBG_DEBUG |
37 | ||
38 | #define NET_NAME(net) ((net == &init_net) ? " (init_net)" : "") | |
1da177e4 LT |
39 | |
40 | static struct file_system_type rpc_pipe_fs_type; | |
4b9a445e | 41 | static const struct rpc_pipe_ops gssd_dummy_pipe_ops; |
1da177e4 | 42 | |
e18b890b | 43 | static struct kmem_cache *rpc_inode_cachep __read_mostly; |
1da177e4 LT |
44 | |
45 | #define RPC_UPCALL_TIMEOUT (30*HZ) | |
46 | ||
2d00131a SK |
47 | static BLOCKING_NOTIFIER_HEAD(rpc_pipefs_notifier_list); |
48 | ||
49 | int rpc_pipefs_notifier_register(struct notifier_block *nb) | |
50 | { | |
51 | return blocking_notifier_chain_cond_register(&rpc_pipefs_notifier_list, nb); | |
52 | } | |
53 | EXPORT_SYMBOL_GPL(rpc_pipefs_notifier_register); | |
54 | ||
55 | void rpc_pipefs_notifier_unregister(struct notifier_block *nb) | |
56 | { | |
57 | blocking_notifier_chain_unregister(&rpc_pipefs_notifier_list, nb); | |
58 | } | |
59 | EXPORT_SYMBOL_GPL(rpc_pipefs_notifier_unregister); | |
60 | ||
591ad7fe | 61 | static void rpc_purge_list(wait_queue_head_t *waitq, struct list_head *head, |
9842ef35 | 62 | void (*destroy_msg)(struct rpc_pipe_msg *), int err) |
1da177e4 | 63 | { |
1da177e4 LT |
64 | struct rpc_pipe_msg *msg; |
65 | ||
9842ef35 TM |
66 | if (list_empty(head)) |
67 | return; | |
68 | do { | |
b3eb67a2 | 69 | msg = list_entry(head->next, struct rpc_pipe_msg, list); |
5a67657a | 70 | list_del_init(&msg->list); |
1da177e4 | 71 | msg->errno = err; |
b3eb67a2 | 72 | destroy_msg(msg); |
9842ef35 | 73 | } while (!list_empty(head)); |
92123e06 JL |
74 | |
75 | if (waitq) | |
76 | wake_up(waitq); | |
1da177e4 LT |
77 | } |
78 | ||
79 | static void | |
65f27f38 | 80 | rpc_timeout_upcall_queue(struct work_struct *work) |
1da177e4 | 81 | { |
9842ef35 | 82 | LIST_HEAD(free_list); |
ba9e0975 SK |
83 | struct rpc_pipe *pipe = |
84 | container_of(work, struct rpc_pipe, queue_timeout.work); | |
9842ef35 | 85 | void (*destroy_msg)(struct rpc_pipe_msg *); |
591ad7fe | 86 | struct dentry *dentry; |
1da177e4 | 87 | |
ba9e0975 | 88 | spin_lock(&pipe->lock); |
ba9e0975 SK |
89 | destroy_msg = pipe->ops->destroy_msg; |
90 | if (pipe->nreaders == 0) { | |
91 | list_splice_init(&pipe->pipe, &free_list); | |
92 | pipe->pipelen = 0; | |
9842ef35 | 93 | } |
591ad7fe | 94 | dentry = dget(pipe->dentry); |
ba9e0975 | 95 | spin_unlock(&pipe->lock); |
92123e06 JL |
96 | rpc_purge_list(dentry ? &RPC_I(dentry->d_inode)->waitq : NULL, |
97 | &free_list, destroy_msg, -ETIMEDOUT); | |
98 | dput(dentry); | |
1da177e4 LT |
99 | } |
100 | ||
c1225158 PT |
101 | ssize_t rpc_pipe_generic_upcall(struct file *filp, struct rpc_pipe_msg *msg, |
102 | char __user *dst, size_t buflen) | |
103 | { | |
104 | char *data = (char *)msg->data + msg->copied; | |
105 | size_t mlen = min(msg->len - msg->copied, buflen); | |
106 | unsigned long left; | |
107 | ||
108 | left = copy_to_user(dst, data, mlen); | |
109 | if (left == mlen) { | |
110 | msg->errno = -EFAULT; | |
111 | return -EFAULT; | |
112 | } | |
113 | ||
114 | mlen -= left; | |
115 | msg->copied += mlen; | |
116 | msg->errno = 0; | |
117 | return mlen; | |
118 | } | |
119 | EXPORT_SYMBOL_GPL(rpc_pipe_generic_upcall); | |
120 | ||
93a44a75 | 121 | /** |
1a5778aa | 122 | * rpc_queue_upcall - queue an upcall message to userspace |
bda14606 | 123 | * @pipe: upcall pipe on which to queue given message |
93a44a75 BF |
124 | * @msg: message to queue |
125 | * | |
126 | * Call with an @inode created by rpc_mkpipe() to queue an upcall. | |
127 | * A userspace process may then later read the upcall by performing a | |
128 | * read on an open file for this inode. It is up to the caller to | |
129 | * initialize the fields of @msg (other than @msg->list) appropriately. | |
130 | */ | |
1da177e4 | 131 | int |
d706ed1f | 132 | rpc_queue_upcall(struct rpc_pipe *pipe, struct rpc_pipe_msg *msg) |
1da177e4 | 133 | { |
6070fe6f | 134 | int res = -EPIPE; |
591ad7fe | 135 | struct dentry *dentry; |
1da177e4 | 136 | |
d0fe13ba | 137 | spin_lock(&pipe->lock); |
d0fe13ba SK |
138 | if (pipe->nreaders) { |
139 | list_add_tail(&msg->list, &pipe->pipe); | |
140 | pipe->pipelen += msg->len; | |
6070fe6f | 141 | res = 0; |
d0fe13ba SK |
142 | } else if (pipe->flags & RPC_PIPE_WAIT_FOR_OPEN) { |
143 | if (list_empty(&pipe->pipe)) | |
24c5d9d7 | 144 | queue_delayed_work(rpciod_workqueue, |
d0fe13ba | 145 | &pipe->queue_timeout, |
1da177e4 | 146 | RPC_UPCALL_TIMEOUT); |
d0fe13ba SK |
147 | list_add_tail(&msg->list, &pipe->pipe); |
148 | pipe->pipelen += msg->len; | |
6070fe6f TM |
149 | res = 0; |
150 | } | |
591ad7fe | 151 | dentry = dget(pipe->dentry); |
d0fe13ba | 152 | spin_unlock(&pipe->lock); |
591ad7fe SK |
153 | if (dentry) { |
154 | wake_up(&RPC_I(dentry->d_inode)->waitq); | |
155 | dput(dentry); | |
156 | } | |
1da177e4 LT |
157 | return res; |
158 | } | |
468039ee | 159 | EXPORT_SYMBOL_GPL(rpc_queue_upcall); |
1da177e4 | 160 | |
6070fe6f TM |
161 | static inline void |
162 | rpc_inode_setowner(struct inode *inode, void *private) | |
163 | { | |
164 | RPC_I(inode)->private = private; | |
165 | } | |
166 | ||
1da177e4 LT |
167 | static void |
168 | rpc_close_pipes(struct inode *inode) | |
169 | { | |
ba9e0975 | 170 | struct rpc_pipe *pipe = RPC_I(inode)->pipe; |
e712804a | 171 | int need_release; |
ad6b1340 | 172 | LIST_HEAD(free_list); |
1da177e4 | 173 | |
1b1dcc1b | 174 | mutex_lock(&inode->i_mutex); |
ad6b1340 SK |
175 | spin_lock(&pipe->lock); |
176 | need_release = pipe->nreaders != 0 || pipe->nwriters != 0; | |
177 | pipe->nreaders = 0; | |
178 | list_splice_init(&pipe->in_upcall, &free_list); | |
179 | list_splice_init(&pipe->pipe, &free_list); | |
180 | pipe->pipelen = 0; | |
181 | pipe->dentry = NULL; | |
182 | spin_unlock(&pipe->lock); | |
591ad7fe | 183 | rpc_purge_list(&RPC_I(inode)->waitq, &free_list, pipe->ops->destroy_msg, -EPIPE); |
ad6b1340 SK |
184 | pipe->nwriters = 0; |
185 | if (need_release && pipe->ops->release_pipe) | |
186 | pipe->ops->release_pipe(inode); | |
187 | cancel_delayed_work_sync(&pipe->queue_timeout); | |
6070fe6f | 188 | rpc_inode_setowner(inode, NULL); |
2c9030ee | 189 | RPC_I(inode)->pipe = NULL; |
1b1dcc1b | 190 | mutex_unlock(&inode->i_mutex); |
1da177e4 LT |
191 | } |
192 | ||
1da177e4 LT |
193 | static struct inode * |
194 | rpc_alloc_inode(struct super_block *sb) | |
195 | { | |
196 | struct rpc_inode *rpci; | |
e94b1766 | 197 | rpci = (struct rpc_inode *)kmem_cache_alloc(rpc_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
198 | if (!rpci) |
199 | return NULL; | |
200 | return &rpci->vfs_inode; | |
201 | } | |
202 | ||
203 | static void | |
fa0d7e3d | 204 | rpc_i_callback(struct rcu_head *head) |
1da177e4 | 205 | { |
fa0d7e3d | 206 | struct inode *inode = container_of(head, struct inode, i_rcu); |
1da177e4 LT |
207 | kmem_cache_free(rpc_inode_cachep, RPC_I(inode)); |
208 | } | |
209 | ||
fa0d7e3d NP |
210 | static void |
211 | rpc_destroy_inode(struct inode *inode) | |
212 | { | |
213 | call_rcu(&inode->i_rcu, rpc_i_callback); | |
214 | } | |
215 | ||
1da177e4 LT |
216 | static int |
217 | rpc_pipe_open(struct inode *inode, struct file *filp) | |
218 | { | |
2c9030ee | 219 | struct rpc_pipe *pipe; |
c3810608 | 220 | int first_open; |
1da177e4 LT |
221 | int res = -ENXIO; |
222 | ||
1b1dcc1b | 223 | mutex_lock(&inode->i_mutex); |
2c9030ee SK |
224 | pipe = RPC_I(inode)->pipe; |
225 | if (pipe == NULL) | |
c3810608 | 226 | goto out; |
d0fe13ba SK |
227 | first_open = pipe->nreaders == 0 && pipe->nwriters == 0; |
228 | if (first_open && pipe->ops->open_pipe) { | |
229 | res = pipe->ops->open_pipe(inode); | |
c3810608 BF |
230 | if (res) |
231 | goto out; | |
1da177e4 | 232 | } |
c3810608 | 233 | if (filp->f_mode & FMODE_READ) |
d0fe13ba | 234 | pipe->nreaders++; |
c3810608 | 235 | if (filp->f_mode & FMODE_WRITE) |
d0fe13ba | 236 | pipe->nwriters++; |
c3810608 BF |
237 | res = 0; |
238 | out: | |
1b1dcc1b | 239 | mutex_unlock(&inode->i_mutex); |
1da177e4 LT |
240 | return res; |
241 | } | |
242 | ||
243 | static int | |
244 | rpc_pipe_release(struct inode *inode, struct file *filp) | |
245 | { | |
2c9030ee | 246 | struct rpc_pipe *pipe; |
1da177e4 | 247 | struct rpc_pipe_msg *msg; |
e712804a | 248 | int last_close; |
1da177e4 | 249 | |
1b1dcc1b | 250 | mutex_lock(&inode->i_mutex); |
2c9030ee SK |
251 | pipe = RPC_I(inode)->pipe; |
252 | if (pipe == NULL) | |
1da177e4 | 253 | goto out; |
655b5bb4 | 254 | msg = filp->private_data; |
1da177e4 | 255 | if (msg != NULL) { |
ba9e0975 | 256 | spin_lock(&pipe->lock); |
48e49187 | 257 | msg->errno = -EAGAIN; |
5a67657a | 258 | list_del_init(&msg->list); |
ba9e0975 SK |
259 | spin_unlock(&pipe->lock); |
260 | pipe->ops->destroy_msg(msg); | |
1da177e4 LT |
261 | } |
262 | if (filp->f_mode & FMODE_WRITE) | |
ba9e0975 | 263 | pipe->nwriters --; |
9842ef35 | 264 | if (filp->f_mode & FMODE_READ) { |
ba9e0975 SK |
265 | pipe->nreaders --; |
266 | if (pipe->nreaders == 0) { | |
9842ef35 | 267 | LIST_HEAD(free_list); |
ba9e0975 SK |
268 | spin_lock(&pipe->lock); |
269 | list_splice_init(&pipe->pipe, &free_list); | |
270 | pipe->pipelen = 0; | |
271 | spin_unlock(&pipe->lock); | |
591ad7fe | 272 | rpc_purge_list(&RPC_I(inode)->waitq, &free_list, |
ba9e0975 | 273 | pipe->ops->destroy_msg, -EAGAIN); |
9842ef35 TM |
274 | } |
275 | } | |
ba9e0975 SK |
276 | last_close = pipe->nwriters == 0 && pipe->nreaders == 0; |
277 | if (last_close && pipe->ops->release_pipe) | |
278 | pipe->ops->release_pipe(inode); | |
1da177e4 | 279 | out: |
1b1dcc1b | 280 | mutex_unlock(&inode->i_mutex); |
1da177e4 LT |
281 | return 0; |
282 | } | |
283 | ||
284 | static ssize_t | |
285 | rpc_pipe_read(struct file *filp, char __user *buf, size_t len, loff_t *offset) | |
286 | { | |
496ad9aa | 287 | struct inode *inode = file_inode(filp); |
2c9030ee | 288 | struct rpc_pipe *pipe; |
1da177e4 LT |
289 | struct rpc_pipe_msg *msg; |
290 | int res = 0; | |
291 | ||
1b1dcc1b | 292 | mutex_lock(&inode->i_mutex); |
2c9030ee SK |
293 | pipe = RPC_I(inode)->pipe; |
294 | if (pipe == NULL) { | |
1da177e4 LT |
295 | res = -EPIPE; |
296 | goto out_unlock; | |
297 | } | |
298 | msg = filp->private_data; | |
299 | if (msg == NULL) { | |
d0fe13ba SK |
300 | spin_lock(&pipe->lock); |
301 | if (!list_empty(&pipe->pipe)) { | |
302 | msg = list_entry(pipe->pipe.next, | |
1da177e4 LT |
303 | struct rpc_pipe_msg, |
304 | list); | |
d0fe13ba SK |
305 | list_move(&msg->list, &pipe->in_upcall); |
306 | pipe->pipelen -= msg->len; | |
1da177e4 LT |
307 | filp->private_data = msg; |
308 | msg->copied = 0; | |
309 | } | |
d0fe13ba | 310 | spin_unlock(&pipe->lock); |
1da177e4 LT |
311 | if (msg == NULL) |
312 | goto out_unlock; | |
313 | } | |
314 | /* NOTE: it is up to the callback to update msg->copied */ | |
d0fe13ba | 315 | res = pipe->ops->upcall(filp, msg, buf, len); |
1da177e4 LT |
316 | if (res < 0 || msg->len == msg->copied) { |
317 | filp->private_data = NULL; | |
d0fe13ba | 318 | spin_lock(&pipe->lock); |
5a67657a | 319 | list_del_init(&msg->list); |
d0fe13ba SK |
320 | spin_unlock(&pipe->lock); |
321 | pipe->ops->destroy_msg(msg); | |
1da177e4 LT |
322 | } |
323 | out_unlock: | |
1b1dcc1b | 324 | mutex_unlock(&inode->i_mutex); |
1da177e4 LT |
325 | return res; |
326 | } | |
327 | ||
328 | static ssize_t | |
329 | rpc_pipe_write(struct file *filp, const char __user *buf, size_t len, loff_t *offset) | |
330 | { | |
496ad9aa | 331 | struct inode *inode = file_inode(filp); |
1da177e4 LT |
332 | int res; |
333 | ||
1b1dcc1b | 334 | mutex_lock(&inode->i_mutex); |
1da177e4 | 335 | res = -EPIPE; |
2c9030ee SK |
336 | if (RPC_I(inode)->pipe != NULL) |
337 | res = RPC_I(inode)->pipe->ops->downcall(filp, buf, len); | |
1b1dcc1b | 338 | mutex_unlock(&inode->i_mutex); |
1da177e4 LT |
339 | return res; |
340 | } | |
341 | ||
342 | static unsigned int | |
343 | rpc_pipe_poll(struct file *filp, struct poll_table_struct *wait) | |
344 | { | |
496ad9aa | 345 | struct inode *inode = file_inode(filp); |
591ad7fe SK |
346 | struct rpc_inode *rpci = RPC_I(inode); |
347 | unsigned int mask = POLLOUT | POLLWRNORM; | |
1da177e4 | 348 | |
1da177e4 LT |
349 | poll_wait(filp, &rpci->waitq, wait); |
350 | ||
591ad7fe SK |
351 | mutex_lock(&inode->i_mutex); |
352 | if (rpci->pipe == NULL) | |
1da177e4 | 353 | mask |= POLLERR | POLLHUP; |
591ad7fe | 354 | else if (filp->private_data || !list_empty(&rpci->pipe->pipe)) |
1da177e4 | 355 | mask |= POLLIN | POLLRDNORM; |
591ad7fe | 356 | mutex_unlock(&inode->i_mutex); |
1da177e4 LT |
357 | return mask; |
358 | } | |
359 | ||
a6f8dbc6 AB |
360 | static long |
361 | rpc_pipe_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) | |
1da177e4 | 362 | { |
496ad9aa | 363 | struct inode *inode = file_inode(filp); |
2c9030ee | 364 | struct rpc_pipe *pipe; |
1da177e4 LT |
365 | int len; |
366 | ||
367 | switch (cmd) { | |
368 | case FIONREAD: | |
2c9030ee SK |
369 | mutex_lock(&inode->i_mutex); |
370 | pipe = RPC_I(inode)->pipe; | |
371 | if (pipe == NULL) { | |
372 | mutex_unlock(&inode->i_mutex); | |
1da177e4 | 373 | return -EPIPE; |
a6f8dbc6 | 374 | } |
2c9030ee | 375 | spin_lock(&pipe->lock); |
d0fe13ba | 376 | len = pipe->pipelen; |
1da177e4 LT |
377 | if (filp->private_data) { |
378 | struct rpc_pipe_msg *msg; | |
655b5bb4 | 379 | msg = filp->private_data; |
1da177e4 LT |
380 | len += msg->len - msg->copied; |
381 | } | |
d0fe13ba | 382 | spin_unlock(&pipe->lock); |
2c9030ee | 383 | mutex_unlock(&inode->i_mutex); |
1da177e4 LT |
384 | return put_user(len, (int __user *)arg); |
385 | default: | |
386 | return -EINVAL; | |
387 | } | |
388 | } | |
389 | ||
da7071d7 | 390 | static const struct file_operations rpc_pipe_fops = { |
1da177e4 LT |
391 | .owner = THIS_MODULE, |
392 | .llseek = no_llseek, | |
393 | .read = rpc_pipe_read, | |
394 | .write = rpc_pipe_write, | |
395 | .poll = rpc_pipe_poll, | |
674b604c | 396 | .unlocked_ioctl = rpc_pipe_ioctl, |
1da177e4 LT |
397 | .open = rpc_pipe_open, |
398 | .release = rpc_pipe_release, | |
399 | }; | |
400 | ||
401 | static int | |
402 | rpc_show_info(struct seq_file *m, void *v) | |
403 | { | |
404 | struct rpc_clnt *clnt = m->private; | |
405 | ||
2446ab60 | 406 | rcu_read_lock(); |
4e0038b6 TM |
407 | seq_printf(m, "RPC server: %s\n", |
408 | rcu_dereference(clnt->cl_xprt)->servername); | |
55909f21 | 409 | seq_printf(m, "service: %s (%d) version %d\n", clnt->cl_program->name, |
1da177e4 | 410 | clnt->cl_prog, clnt->cl_vers); |
e7f78657 CL |
411 | seq_printf(m, "address: %s\n", rpc_peeraddr2str(clnt, RPC_DISPLAY_ADDR)); |
412 | seq_printf(m, "protocol: %s\n", rpc_peeraddr2str(clnt, RPC_DISPLAY_PROTO)); | |
bf19aace | 413 | seq_printf(m, "port: %s\n", rpc_peeraddr2str(clnt, RPC_DISPLAY_PORT)); |
2446ab60 | 414 | rcu_read_unlock(); |
1da177e4 LT |
415 | return 0; |
416 | } | |
417 | ||
418 | static int | |
419 | rpc_info_open(struct inode *inode, struct file *file) | |
420 | { | |
006abe88 | 421 | struct rpc_clnt *clnt = NULL; |
1da177e4 LT |
422 | int ret = single_open(file, rpc_show_info, NULL); |
423 | ||
424 | if (!ret) { | |
425 | struct seq_file *m = file->private_data; | |
006abe88 TM |
426 | |
427 | spin_lock(&file->f_path.dentry->d_lock); | |
428 | if (!d_unhashed(file->f_path.dentry)) | |
429 | clnt = RPC_I(inode)->private; | |
430 | if (clnt != NULL && atomic_inc_not_zero(&clnt->cl_count)) { | |
431 | spin_unlock(&file->f_path.dentry->d_lock); | |
1da177e4 LT |
432 | m->private = clnt; |
433 | } else { | |
006abe88 | 434 | spin_unlock(&file->f_path.dentry->d_lock); |
1da177e4 LT |
435 | single_release(inode, file); |
436 | ret = -EINVAL; | |
437 | } | |
1da177e4 LT |
438 | } |
439 | return ret; | |
440 | } | |
441 | ||
442 | static int | |
443 | rpc_info_release(struct inode *inode, struct file *file) | |
444 | { | |
445 | struct seq_file *m = file->private_data; | |
446 | struct rpc_clnt *clnt = (struct rpc_clnt *)m->private; | |
447 | ||
448 | if (clnt) | |
449 | rpc_release_client(clnt); | |
450 | return single_release(inode, file); | |
451 | } | |
452 | ||
da7071d7 | 453 | static const struct file_operations rpc_info_operations = { |
1da177e4 LT |
454 | .owner = THIS_MODULE, |
455 | .open = rpc_info_open, | |
456 | .read = seq_read, | |
457 | .llseek = seq_lseek, | |
458 | .release = rpc_info_release, | |
459 | }; | |
460 | ||
461 | ||
1da177e4 LT |
462 | /* |
463 | * Description of fs contents. | |
464 | */ | |
465 | struct rpc_filelist { | |
ac6fecee | 466 | const char *name; |
99ac48f5 | 467 | const struct file_operations *i_fop; |
7364af6a | 468 | umode_t mode; |
1da177e4 LT |
469 | }; |
470 | ||
1da177e4 | 471 | static struct inode * |
7364af6a | 472 | rpc_get_inode(struct super_block *sb, umode_t mode) |
1da177e4 LT |
473 | { |
474 | struct inode *inode = new_inode(sb); | |
475 | if (!inode) | |
476 | return NULL; | |
85fe4025 | 477 | inode->i_ino = get_next_ino(); |
1da177e4 | 478 | inode->i_mode = mode; |
1da177e4 | 479 | inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; |
89f0e4fe JP |
480 | switch (mode & S_IFMT) { |
481 | case S_IFDIR: | |
482 | inode->i_fop = &simple_dir_operations; | |
275448eb | 483 | inode->i_op = &simple_dir_inode_operations; |
89f0e4fe JP |
484 | inc_nlink(inode); |
485 | default: | |
486 | break; | |
1da177e4 LT |
487 | } |
488 | return inode; | |
489 | } | |
490 | ||
7589806e TM |
491 | static int __rpc_create_common(struct inode *dir, struct dentry *dentry, |
492 | umode_t mode, | |
493 | const struct file_operations *i_fop, | |
494 | void *private) | |
495 | { | |
496 | struct inode *inode; | |
497 | ||
beb0f0a9 | 498 | d_drop(dentry); |
7589806e TM |
499 | inode = rpc_get_inode(dir->i_sb, mode); |
500 | if (!inode) | |
501 | goto out_err; | |
502 | inode->i_ino = iunique(dir->i_sb, 100); | |
503 | if (i_fop) | |
504 | inode->i_fop = i_fop; | |
505 | if (private) | |
506 | rpc_inode_setowner(inode, private); | |
507 | d_add(dentry, inode); | |
508 | return 0; | |
509 | out_err: | |
1e903eda AV |
510 | printk(KERN_WARNING "%s: %s failed to allocate inode for dentry %pd\n", |
511 | __FILE__, __func__, dentry); | |
7589806e TM |
512 | dput(dentry); |
513 | return -ENOMEM; | |
514 | } | |
515 | ||
ac6fecee TM |
516 | static int __rpc_create(struct inode *dir, struct dentry *dentry, |
517 | umode_t mode, | |
518 | const struct file_operations *i_fop, | |
519 | void *private) | |
520 | { | |
521 | int err; | |
522 | ||
523 | err = __rpc_create_common(dir, dentry, S_IFREG | mode, i_fop, private); | |
524 | if (err) | |
525 | return err; | |
526 | fsnotify_create(dir, dentry); | |
527 | return 0; | |
528 | } | |
529 | ||
7589806e TM |
530 | static int __rpc_mkdir(struct inode *dir, struct dentry *dentry, |
531 | umode_t mode, | |
532 | const struct file_operations *i_fop, | |
533 | void *private) | |
534 | { | |
535 | int err; | |
536 | ||
537 | err = __rpc_create_common(dir, dentry, S_IFDIR | mode, i_fop, private); | |
538 | if (err) | |
539 | return err; | |
540 | inc_nlink(dir); | |
541 | fsnotify_mkdir(dir, dentry); | |
542 | return 0; | |
543 | } | |
544 | ||
ba9e0975 SK |
545 | static void |
546 | init_pipe(struct rpc_pipe *pipe) | |
547 | { | |
548 | pipe->nreaders = 0; | |
549 | pipe->nwriters = 0; | |
550 | INIT_LIST_HEAD(&pipe->in_upcall); | |
551 | INIT_LIST_HEAD(&pipe->in_downcall); | |
552 | INIT_LIST_HEAD(&pipe->pipe); | |
553 | pipe->pipelen = 0; | |
ba9e0975 SK |
554 | INIT_DELAYED_WORK(&pipe->queue_timeout, |
555 | rpc_timeout_upcall_queue); | |
556 | pipe->ops = NULL; | |
557 | spin_lock_init(&pipe->lock); | |
c239d83b SK |
558 | pipe->dentry = NULL; |
559 | } | |
ba9e0975 | 560 | |
c239d83b SK |
561 | void rpc_destroy_pipe_data(struct rpc_pipe *pipe) |
562 | { | |
563 | kfree(pipe); | |
ba9e0975 | 564 | } |
c239d83b | 565 | EXPORT_SYMBOL_GPL(rpc_destroy_pipe_data); |
ba9e0975 | 566 | |
c239d83b | 567 | struct rpc_pipe *rpc_mkpipe_data(const struct rpc_pipe_ops *ops, int flags) |
7589806e | 568 | { |
ba9e0975 | 569 | struct rpc_pipe *pipe; |
7589806e | 570 | |
ba9e0975 SK |
571 | pipe = kzalloc(sizeof(struct rpc_pipe), GFP_KERNEL); |
572 | if (!pipe) | |
c239d83b | 573 | return ERR_PTR(-ENOMEM); |
ba9e0975 | 574 | init_pipe(pipe); |
c239d83b SK |
575 | pipe->ops = ops; |
576 | pipe->flags = flags; | |
577 | return pipe; | |
578 | } | |
579 | EXPORT_SYMBOL_GPL(rpc_mkpipe_data); | |
580 | ||
581 | static int __rpc_mkpipe_dentry(struct inode *dir, struct dentry *dentry, | |
582 | umode_t mode, | |
583 | const struct file_operations *i_fop, | |
584 | void *private, | |
585 | struct rpc_pipe *pipe) | |
7589806e TM |
586 | { |
587 | struct rpc_inode *rpci; | |
588 | int err; | |
589 | ||
590 | err = __rpc_create_common(dir, dentry, S_IFIFO | mode, i_fop, private); | |
591 | if (err) | |
592 | return err; | |
593 | rpci = RPC_I(dentry->d_inode); | |
7589806e | 594 | rpci->private = private; |
ba9e0975 | 595 | rpci->pipe = pipe; |
7589806e TM |
596 | fsnotify_create(dir, dentry); |
597 | return 0; | |
598 | } | |
599 | ||
ac6fecee TM |
600 | static int __rpc_rmdir(struct inode *dir, struct dentry *dentry) |
601 | { | |
602 | int ret; | |
603 | ||
604 | dget(dentry); | |
605 | ret = simple_rmdir(dir, dentry); | |
606 | d_delete(dentry); | |
607 | dput(dentry); | |
608 | return ret; | |
609 | } | |
610 | ||
eee17325 SK |
611 | int rpc_rmdir(struct dentry *dentry) |
612 | { | |
613 | struct dentry *parent; | |
614 | struct inode *dir; | |
615 | int error; | |
616 | ||
617 | parent = dget_parent(dentry); | |
618 | dir = parent->d_inode; | |
619 | mutex_lock_nested(&dir->i_mutex, I_MUTEX_PARENT); | |
620 | error = __rpc_rmdir(dir, dentry); | |
621 | mutex_unlock(&dir->i_mutex); | |
622 | dput(parent); | |
623 | return error; | |
624 | } | |
625 | EXPORT_SYMBOL_GPL(rpc_rmdir); | |
626 | ||
810d90bc TM |
627 | static int __rpc_unlink(struct inode *dir, struct dentry *dentry) |
628 | { | |
629 | int ret; | |
630 | ||
631 | dget(dentry); | |
632 | ret = simple_unlink(dir, dentry); | |
633 | d_delete(dentry); | |
634 | dput(dentry); | |
635 | return ret; | |
636 | } | |
637 | ||
638 | static int __rpc_rmpipe(struct inode *dir, struct dentry *dentry) | |
639 | { | |
640 | struct inode *inode = dentry->d_inode; | |
810d90bc | 641 | |
810d90bc TM |
642 | rpc_close_pipes(inode); |
643 | return __rpc_unlink(dir, dentry); | |
644 | } | |
645 | ||
5bff0386 | 646 | static struct dentry *__rpc_lookup_create_exclusive(struct dentry *parent, |
d3db90b0 | 647 | const char *name) |
cfeaa4a3 | 648 | { |
d3db90b0 AV |
649 | struct qstr q = QSTR_INIT(name, strlen(name)); |
650 | struct dentry *dentry = d_hash_and_lookup(parent, &q); | |
cfeaa4a3 | 651 | if (!dentry) { |
d3db90b0 | 652 | dentry = d_alloc(parent, &q); |
5bff0386 SK |
653 | if (!dentry) |
654 | return ERR_PTR(-ENOMEM); | |
cfeaa4a3 | 655 | } |
76fa6665 | 656 | if (dentry->d_inode == NULL) |
cfeaa4a3 TM |
657 | return dentry; |
658 | dput(dentry); | |
659 | return ERR_PTR(-EEXIST); | |
660 | } | |
661 | ||
1da177e4 LT |
662 | /* |
663 | * FIXME: This probably has races. | |
664 | */ | |
ac6fecee TM |
665 | static void __rpc_depopulate(struct dentry *parent, |
666 | const struct rpc_filelist *files, | |
667 | int start, int eof) | |
1da177e4 LT |
668 | { |
669 | struct inode *dir = parent->d_inode; | |
ac6fecee TM |
670 | struct dentry *dentry; |
671 | struct qstr name; | |
672 | int i; | |
1da177e4 | 673 | |
ac6fecee TM |
674 | for (i = start; i < eof; i++) { |
675 | name.name = files[i].name; | |
676 | name.len = strlen(files[i].name); | |
d3db90b0 | 677 | dentry = d_hash_and_lookup(parent, &name); |
ac6fecee TM |
678 | |
679 | if (dentry == NULL) | |
62e1761c | 680 | continue; |
ac6fecee TM |
681 | if (dentry->d_inode == NULL) |
682 | goto next; | |
683 | switch (dentry->d_inode->i_mode & S_IFMT) { | |
684 | default: | |
685 | BUG(); | |
686 | case S_IFREG: | |
687 | __rpc_unlink(dir, dentry); | |
1da177e4 | 688 | break; |
ac6fecee TM |
689 | case S_IFDIR: |
690 | __rpc_rmdir(dir, dentry); | |
691 | } | |
692 | next: | |
693 | dput(dentry); | |
1da177e4 | 694 | } |
ac6fecee TM |
695 | } |
696 | ||
697 | static void rpc_depopulate(struct dentry *parent, | |
698 | const struct rpc_filelist *files, | |
699 | int start, int eof) | |
700 | { | |
701 | struct inode *dir = parent->d_inode; | |
702 | ||
703 | mutex_lock_nested(&dir->i_mutex, I_MUTEX_CHILD); | |
704 | __rpc_depopulate(parent, files, start, eof); | |
1b1dcc1b | 705 | mutex_unlock(&dir->i_mutex); |
1da177e4 LT |
706 | } |
707 | ||
ac6fecee TM |
708 | static int rpc_populate(struct dentry *parent, |
709 | const struct rpc_filelist *files, | |
710 | int start, int eof, | |
711 | void *private) | |
1da177e4 | 712 | { |
ac6fecee | 713 | struct inode *dir = parent->d_inode; |
1da177e4 | 714 | struct dentry *dentry; |
ac6fecee | 715 | int i, err; |
1da177e4 | 716 | |
1b1dcc1b | 717 | mutex_lock(&dir->i_mutex); |
1da177e4 | 718 | for (i = start; i < eof; i++) { |
d3db90b0 | 719 | dentry = __rpc_lookup_create_exclusive(parent, files[i].name); |
ac6fecee TM |
720 | err = PTR_ERR(dentry); |
721 | if (IS_ERR(dentry)) | |
1da177e4 | 722 | goto out_bad; |
ac6fecee TM |
723 | switch (files[i].mode & S_IFMT) { |
724 | default: | |
725 | BUG(); | |
726 | case S_IFREG: | |
727 | err = __rpc_create(dir, dentry, | |
728 | files[i].mode, | |
729 | files[i].i_fop, | |
730 | private); | |
731 | break; | |
732 | case S_IFDIR: | |
733 | err = __rpc_mkdir(dir, dentry, | |
734 | files[i].mode, | |
735 | NULL, | |
736 | private); | |
1da177e4 | 737 | } |
ac6fecee TM |
738 | if (err != 0) |
739 | goto out_bad; | |
1da177e4 | 740 | } |
1b1dcc1b | 741 | mutex_unlock(&dir->i_mutex); |
1da177e4 LT |
742 | return 0; |
743 | out_bad: | |
ac6fecee | 744 | __rpc_depopulate(parent, files, start, eof); |
1b1dcc1b | 745 | mutex_unlock(&dir->i_mutex); |
1e903eda AV |
746 | printk(KERN_WARNING "%s: %s failed to populate directory %pd\n", |
747 | __FILE__, __func__, parent); | |
ac6fecee | 748 | return err; |
f134585a | 749 | } |
1da177e4 | 750 | |
e57aed77 | 751 | static struct dentry *rpc_mkdir_populate(struct dentry *parent, |
a95e691f | 752 | const char *name, umode_t mode, void *private, |
e57aed77 | 753 | int (*populate)(struct dentry *, void *), void *args_populate) |
f134585a | 754 | { |
f134585a | 755 | struct dentry *dentry; |
7d59d1e8 | 756 | struct inode *dir = parent->d_inode; |
f134585a TM |
757 | int error; |
758 | ||
7d59d1e8 TM |
759 | mutex_lock_nested(&dir->i_mutex, I_MUTEX_PARENT); |
760 | dentry = __rpc_lookup_create_exclusive(parent, name); | |
f134585a | 761 | if (IS_ERR(dentry)) |
7d59d1e8 TM |
762 | goto out; |
763 | error = __rpc_mkdir(dir, dentry, mode, NULL, private); | |
7589806e TM |
764 | if (error != 0) |
765 | goto out_err; | |
e57aed77 TM |
766 | if (populate != NULL) { |
767 | error = populate(dentry, args_populate); | |
768 | if (error) | |
769 | goto err_rmdir; | |
770 | } | |
f134585a | 771 | out: |
1b1dcc1b | 772 | mutex_unlock(&dir->i_mutex); |
5c3e985a | 773 | return dentry; |
ac6fecee | 774 | err_rmdir: |
f134585a | 775 | __rpc_rmdir(dir, dentry); |
7589806e | 776 | out_err: |
f134585a TM |
777 | dentry = ERR_PTR(error); |
778 | goto out; | |
1da177e4 LT |
779 | } |
780 | ||
e57aed77 TM |
781 | static int rpc_rmdir_depopulate(struct dentry *dentry, |
782 | void (*depopulate)(struct dentry *)) | |
1da177e4 | 783 | { |
dff02cc1 | 784 | struct dentry *parent; |
f134585a TM |
785 | struct inode *dir; |
786 | int error; | |
278c995c | 787 | |
dff02cc1 TM |
788 | parent = dget_parent(dentry); |
789 | dir = parent->d_inode; | |
c6573c29 | 790 | mutex_lock_nested(&dir->i_mutex, I_MUTEX_PARENT); |
e57aed77 TM |
791 | if (depopulate != NULL) |
792 | depopulate(dentry); | |
f134585a | 793 | error = __rpc_rmdir(dir, dentry); |
1b1dcc1b | 794 | mutex_unlock(&dir->i_mutex); |
dff02cc1 | 795 | dput(parent); |
f134585a | 796 | return error; |
1da177e4 LT |
797 | } |
798 | ||
93a44a75 BF |
799 | /** |
800 | * rpc_mkpipe - make an rpc_pipefs file for kernel<->userspace communication | |
801 | * @parent: dentry of directory to create new "pipe" in | |
802 | * @name: name of pipe | |
803 | * @private: private data to associate with the pipe, for the caller's use | |
bda14606 | 804 | * @pipe: &rpc_pipe containing input parameters |
93a44a75 BF |
805 | * |
806 | * Data is made available for userspace to read by calls to | |
807 | * rpc_queue_upcall(). The actual reads will result in calls to | |
808 | * @ops->upcall, which will be called with the file pointer, | |
809 | * message, and userspace buffer to copy to. | |
810 | * | |
811 | * Writes can come at any time, and do not necessarily have to be | |
812 | * responses to upcalls. They will result in calls to @msg->downcall. | |
813 | * | |
814 | * The @private argument passed here will be available to all these methods | |
496ad9aa | 815 | * from the file pointer, via RPC_I(file_inode(file))->private. |
93a44a75 | 816 | */ |
c239d83b SK |
817 | struct dentry *rpc_mkpipe_dentry(struct dentry *parent, const char *name, |
818 | void *private, struct rpc_pipe *pipe) | |
1da177e4 | 819 | { |
1da177e4 | 820 | struct dentry *dentry; |
7589806e | 821 | struct inode *dir = parent->d_inode; |
7364af6a | 822 | umode_t umode = S_IFIFO | S_IRUSR | S_IWUSR; |
7589806e | 823 | int err; |
7364af6a | 824 | |
c239d83b | 825 | if (pipe->ops->upcall == NULL) |
7364af6a | 826 | umode &= ~S_IRUGO; |
c239d83b | 827 | if (pipe->ops->downcall == NULL) |
7364af6a | 828 | umode &= ~S_IWUGO; |
1da177e4 | 829 | |
cfeaa4a3 | 830 | mutex_lock_nested(&dir->i_mutex, I_MUTEX_PARENT); |
d3db90b0 | 831 | dentry = __rpc_lookup_create_exclusive(parent, name); |
1da177e4 | 832 | if (IS_ERR(dentry)) |
cfeaa4a3 | 833 | goto out; |
c239d83b SK |
834 | err = __rpc_mkpipe_dentry(dir, dentry, umode, &rpc_pipe_fops, |
835 | private, pipe); | |
7589806e TM |
836 | if (err) |
837 | goto out_err; | |
f134585a | 838 | out: |
1b1dcc1b | 839 | mutex_unlock(&dir->i_mutex); |
5c3e985a | 840 | return dentry; |
7589806e TM |
841 | out_err: |
842 | dentry = ERR_PTR(err); | |
1e903eda AV |
843 | printk(KERN_WARNING "%s: %s() failed to create pipe %pd/%s (errno = %d)\n", |
844 | __FILE__, __func__, parent, name, | |
7589806e | 845 | err); |
f134585a | 846 | goto out; |
1da177e4 | 847 | } |
c239d83b | 848 | EXPORT_SYMBOL_GPL(rpc_mkpipe_dentry); |
1da177e4 | 849 | |
93a44a75 BF |
850 | /** |
851 | * rpc_unlink - remove a pipe | |
852 | * @dentry: dentry for the pipe, as returned from rpc_mkpipe | |
853 | * | |
854 | * After this call, lookups will no longer find the pipe, and any | |
855 | * attempts to read or write using preexisting opens of the pipe will | |
856 | * return -EPIPE. | |
857 | */ | |
f134585a | 858 | int |
5d67476f | 859 | rpc_unlink(struct dentry *dentry) |
1da177e4 | 860 | { |
5d67476f | 861 | struct dentry *parent; |
f134585a | 862 | struct inode *dir; |
5d67476f | 863 | int error = 0; |
1da177e4 | 864 | |
5d67476f TM |
865 | parent = dget_parent(dentry); |
866 | dir = parent->d_inode; | |
c6573c29 | 867 | mutex_lock_nested(&dir->i_mutex, I_MUTEX_PARENT); |
810d90bc | 868 | error = __rpc_rmpipe(dir, dentry); |
1b1dcc1b | 869 | mutex_unlock(&dir->i_mutex); |
5d67476f | 870 | dput(parent); |
f134585a | 871 | return error; |
1da177e4 | 872 | } |
468039ee | 873 | EXPORT_SYMBOL_GPL(rpc_unlink); |
1da177e4 | 874 | |
6739ffb7 TM |
875 | /** |
876 | * rpc_init_pipe_dir_head - initialise a struct rpc_pipe_dir_head | |
877 | * @pdh: pointer to struct rpc_pipe_dir_head | |
878 | */ | |
879 | void rpc_init_pipe_dir_head(struct rpc_pipe_dir_head *pdh) | |
880 | { | |
881 | INIT_LIST_HEAD(&pdh->pdh_entries); | |
882 | pdh->pdh_dentry = NULL; | |
883 | } | |
884 | EXPORT_SYMBOL_GPL(rpc_init_pipe_dir_head); | |
885 | ||
886 | /** | |
887 | * rpc_init_pipe_dir_object - initialise a struct rpc_pipe_dir_object | |
888 | * @pdo: pointer to struct rpc_pipe_dir_object | |
889 | * @pdo_ops: pointer to const struct rpc_pipe_dir_object_ops | |
890 | * @pdo_data: pointer to caller-defined data | |
891 | */ | |
892 | void rpc_init_pipe_dir_object(struct rpc_pipe_dir_object *pdo, | |
893 | const struct rpc_pipe_dir_object_ops *pdo_ops, | |
894 | void *pdo_data) | |
895 | { | |
896 | INIT_LIST_HEAD(&pdo->pdo_head); | |
897 | pdo->pdo_ops = pdo_ops; | |
898 | pdo->pdo_data = pdo_data; | |
899 | } | |
900 | EXPORT_SYMBOL_GPL(rpc_init_pipe_dir_object); | |
901 | ||
902 | static int | |
903 | rpc_add_pipe_dir_object_locked(struct net *net, | |
904 | struct rpc_pipe_dir_head *pdh, | |
905 | struct rpc_pipe_dir_object *pdo) | |
906 | { | |
907 | int ret = 0; | |
908 | ||
909 | if (pdh->pdh_dentry) | |
910 | ret = pdo->pdo_ops->create(pdh->pdh_dentry, pdo); | |
911 | if (ret == 0) | |
912 | list_add_tail(&pdo->pdo_head, &pdh->pdh_entries); | |
913 | return ret; | |
914 | } | |
915 | ||
916 | static void | |
917 | rpc_remove_pipe_dir_object_locked(struct net *net, | |
918 | struct rpc_pipe_dir_head *pdh, | |
919 | struct rpc_pipe_dir_object *pdo) | |
920 | { | |
921 | if (pdh->pdh_dentry) | |
922 | pdo->pdo_ops->destroy(pdh->pdh_dentry, pdo); | |
923 | list_del_init(&pdo->pdo_head); | |
924 | } | |
925 | ||
926 | /** | |
927 | * rpc_add_pipe_dir_object - associate a rpc_pipe_dir_object to a directory | |
928 | * @net: pointer to struct net | |
929 | * @pdh: pointer to struct rpc_pipe_dir_head | |
930 | * @pdo: pointer to struct rpc_pipe_dir_object | |
931 | * | |
932 | */ | |
933 | int | |
934 | rpc_add_pipe_dir_object(struct net *net, | |
935 | struct rpc_pipe_dir_head *pdh, | |
936 | struct rpc_pipe_dir_object *pdo) | |
937 | { | |
938 | int ret = 0; | |
939 | ||
940 | if (list_empty(&pdo->pdo_head)) { | |
941 | struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); | |
942 | ||
943 | mutex_lock(&sn->pipefs_sb_lock); | |
944 | ret = rpc_add_pipe_dir_object_locked(net, pdh, pdo); | |
945 | mutex_unlock(&sn->pipefs_sb_lock); | |
946 | } | |
947 | return ret; | |
948 | } | |
949 | EXPORT_SYMBOL_GPL(rpc_add_pipe_dir_object); | |
950 | ||
951 | /** | |
952 | * rpc_remove_pipe_dir_object - remove a rpc_pipe_dir_object from a directory | |
953 | * @net: pointer to struct net | |
954 | * @pdh: pointer to struct rpc_pipe_dir_head | |
955 | * @pdo: pointer to struct rpc_pipe_dir_object | |
956 | * | |
957 | */ | |
958 | void | |
959 | rpc_remove_pipe_dir_object(struct net *net, | |
960 | struct rpc_pipe_dir_head *pdh, | |
961 | struct rpc_pipe_dir_object *pdo) | |
962 | { | |
963 | if (!list_empty(&pdo->pdo_head)) { | |
964 | struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); | |
965 | ||
966 | mutex_lock(&sn->pipefs_sb_lock); | |
967 | rpc_remove_pipe_dir_object_locked(net, pdh, pdo); | |
968 | mutex_unlock(&sn->pipefs_sb_lock); | |
969 | } | |
970 | } | |
971 | EXPORT_SYMBOL_GPL(rpc_remove_pipe_dir_object); | |
972 | ||
298fc355 TM |
973 | /** |
974 | * rpc_find_or_alloc_pipe_dir_object | |
975 | * @net: pointer to struct net | |
976 | * @pdh: pointer to struct rpc_pipe_dir_head | |
977 | * @match: match struct rpc_pipe_dir_object to data | |
978 | * @alloc: allocate a new struct rpc_pipe_dir_object | |
979 | * @data: user defined data for match() and alloc() | |
980 | * | |
981 | */ | |
982 | struct rpc_pipe_dir_object * | |
983 | rpc_find_or_alloc_pipe_dir_object(struct net *net, | |
984 | struct rpc_pipe_dir_head *pdh, | |
985 | int (*match)(struct rpc_pipe_dir_object *, void *), | |
986 | struct rpc_pipe_dir_object *(*alloc)(void *), | |
987 | void *data) | |
988 | { | |
989 | struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); | |
990 | struct rpc_pipe_dir_object *pdo; | |
991 | ||
992 | mutex_lock(&sn->pipefs_sb_lock); | |
993 | list_for_each_entry(pdo, &pdh->pdh_entries, pdo_head) { | |
994 | if (!match(pdo, data)) | |
995 | continue; | |
996 | goto out; | |
997 | } | |
998 | pdo = alloc(data); | |
999 | if (!pdo) | |
1000 | goto out; | |
1001 | rpc_add_pipe_dir_object_locked(net, pdh, pdo); | |
1002 | out: | |
1003 | mutex_unlock(&sn->pipefs_sb_lock); | |
1004 | return pdo; | |
1005 | } | |
1006 | EXPORT_SYMBOL_GPL(rpc_find_or_alloc_pipe_dir_object); | |
1007 | ||
6739ffb7 TM |
1008 | static void |
1009 | rpc_create_pipe_dir_objects(struct rpc_pipe_dir_head *pdh) | |
1010 | { | |
1011 | struct rpc_pipe_dir_object *pdo; | |
1012 | struct dentry *dir = pdh->pdh_dentry; | |
1013 | ||
1014 | list_for_each_entry(pdo, &pdh->pdh_entries, pdo_head) | |
1015 | pdo->pdo_ops->create(dir, pdo); | |
1016 | } | |
1017 | ||
1018 | static void | |
1019 | rpc_destroy_pipe_dir_objects(struct rpc_pipe_dir_head *pdh) | |
1020 | { | |
1021 | struct rpc_pipe_dir_object *pdo; | |
1022 | struct dentry *dir = pdh->pdh_dentry; | |
1023 | ||
1024 | list_for_each_entry(pdo, &pdh->pdh_entries, pdo_head) | |
1025 | pdo->pdo_ops->destroy(dir, pdo); | |
1026 | } | |
1027 | ||
e57aed77 TM |
1028 | enum { |
1029 | RPCAUTH_info, | |
1030 | RPCAUTH_EOF | |
1031 | }; | |
1032 | ||
1033 | static const struct rpc_filelist authfiles[] = { | |
1034 | [RPCAUTH_info] = { | |
1035 | .name = "info", | |
1036 | .i_fop = &rpc_info_operations, | |
1037 | .mode = S_IFREG | S_IRUSR, | |
1038 | }, | |
1039 | }; | |
1040 | ||
1041 | static int rpc_clntdir_populate(struct dentry *dentry, void *private) | |
1042 | { | |
1043 | return rpc_populate(dentry, | |
1044 | authfiles, RPCAUTH_info, RPCAUTH_EOF, | |
1045 | private); | |
1046 | } | |
1047 | ||
1048 | static void rpc_clntdir_depopulate(struct dentry *dentry) | |
1049 | { | |
1050 | rpc_depopulate(dentry, authfiles, RPCAUTH_info, RPCAUTH_EOF); | |
1051 | } | |
1052 | ||
7d59d1e8 TM |
1053 | /** |
1054 | * rpc_create_client_dir - Create a new rpc_client directory in rpc_pipefs | |
a95e691f AV |
1055 | * @dentry: the parent of new directory |
1056 | * @name: the name of new directory | |
7d59d1e8 TM |
1057 | * @rpc_client: rpc client to associate with this directory |
1058 | * | |
1059 | * This creates a directory at the given @path associated with | |
1060 | * @rpc_clnt, which will contain a file named "info" with some basic | |
1061 | * information about the client, together with any "pipes" that may | |
1062 | * later be created using rpc_mkpipe(). | |
1063 | */ | |
23ac6581 | 1064 | struct dentry *rpc_create_client_dir(struct dentry *dentry, |
a95e691f | 1065 | const char *name, |
e57aed77 TM |
1066 | struct rpc_clnt *rpc_client) |
1067 | { | |
6739ffb7 TM |
1068 | struct dentry *ret; |
1069 | ||
1070 | ret = rpc_mkdir_populate(dentry, name, S_IRUGO | S_IXUGO, NULL, | |
e57aed77 | 1071 | rpc_clntdir_populate, rpc_client); |
6739ffb7 TM |
1072 | if (!IS_ERR(ret)) { |
1073 | rpc_client->cl_pipedir_objects.pdh_dentry = ret; | |
1074 | rpc_create_pipe_dir_objects(&rpc_client->cl_pipedir_objects); | |
1075 | } | |
1076 | return ret; | |
e57aed77 TM |
1077 | } |
1078 | ||
1079 | /** | |
1080 | * rpc_remove_client_dir - Remove a directory created with rpc_create_client_dir() | |
6739ffb7 | 1081 | * @rpc_client: rpc_client for the pipe |
e57aed77 | 1082 | */ |
c36dcfe1 | 1083 | int rpc_remove_client_dir(struct rpc_clnt *rpc_client) |
7d59d1e8 | 1084 | { |
c36dcfe1 TM |
1085 | struct dentry *dentry = rpc_client->cl_pipedir_objects.pdh_dentry; |
1086 | ||
1087 | if (dentry == NULL) | |
1088 | return 0; | |
1089 | rpc_destroy_pipe_dir_objects(&rpc_client->cl_pipedir_objects); | |
1090 | rpc_client->cl_pipedir_objects.pdh_dentry = NULL; | |
e57aed77 | 1091 | return rpc_rmdir_depopulate(dentry, rpc_clntdir_depopulate); |
7d59d1e8 TM |
1092 | } |
1093 | ||
8854e82d TM |
1094 | static const struct rpc_filelist cache_pipefs_files[3] = { |
1095 | [0] = { | |
1096 | .name = "channel", | |
1097 | .i_fop = &cache_file_operations_pipefs, | |
96c61cbd | 1098 | .mode = S_IFREG|S_IRUSR|S_IWUSR, |
8854e82d TM |
1099 | }, |
1100 | [1] = { | |
1101 | .name = "content", | |
1102 | .i_fop = &content_file_operations_pipefs, | |
1103 | .mode = S_IFREG|S_IRUSR, | |
1104 | }, | |
1105 | [2] = { | |
1106 | .name = "flush", | |
1107 | .i_fop = &cache_flush_operations_pipefs, | |
1108 | .mode = S_IFREG|S_IRUSR|S_IWUSR, | |
1109 | }, | |
1110 | }; | |
1111 | ||
1112 | static int rpc_cachedir_populate(struct dentry *dentry, void *private) | |
1113 | { | |
1114 | return rpc_populate(dentry, | |
1115 | cache_pipefs_files, 0, 3, | |
1116 | private); | |
1117 | } | |
1118 | ||
1119 | static void rpc_cachedir_depopulate(struct dentry *dentry) | |
1120 | { | |
1121 | rpc_depopulate(dentry, cache_pipefs_files, 0, 3); | |
1122 | } | |
1123 | ||
a95e691f | 1124 | struct dentry *rpc_create_cache_dir(struct dentry *parent, const char *name, |
64f1426f | 1125 | umode_t umode, struct cache_detail *cd) |
8854e82d TM |
1126 | { |
1127 | return rpc_mkdir_populate(parent, name, umode, NULL, | |
1128 | rpc_cachedir_populate, cd); | |
1129 | } | |
1130 | ||
1131 | void rpc_remove_cache_dir(struct dentry *dentry) | |
1132 | { | |
1133 | rpc_rmdir_depopulate(dentry, rpc_cachedir_depopulate); | |
1134 | } | |
1135 | ||
1da177e4 LT |
1136 | /* |
1137 | * populate the filesystem | |
1138 | */ | |
b87221de | 1139 | static const struct super_operations s_ops = { |
1da177e4 LT |
1140 | .alloc_inode = rpc_alloc_inode, |
1141 | .destroy_inode = rpc_destroy_inode, | |
1142 | .statfs = simple_statfs, | |
1143 | }; | |
1144 | ||
1145 | #define RPCAUTH_GSSMAGIC 0x67596969 | |
1146 | ||
bb156749 TM |
1147 | /* |
1148 | * We have a single directory with 1 node in it. | |
1149 | */ | |
1150 | enum { | |
1151 | RPCAUTH_lockd, | |
1152 | RPCAUTH_mount, | |
1153 | RPCAUTH_nfs, | |
1154 | RPCAUTH_portmap, | |
1155 | RPCAUTH_statd, | |
1156 | RPCAUTH_nfsd4_cb, | |
e571cbf1 | 1157 | RPCAUTH_cache, |
b3537c35 | 1158 | RPCAUTH_nfsd, |
4b9a445e | 1159 | RPCAUTH_gssd, |
bb156749 TM |
1160 | RPCAUTH_RootEOF |
1161 | }; | |
1162 | ||
1163 | static const struct rpc_filelist files[] = { | |
1164 | [RPCAUTH_lockd] = { | |
1165 | .name = "lockd", | |
1166 | .mode = S_IFDIR | S_IRUGO | S_IXUGO, | |
1167 | }, | |
1168 | [RPCAUTH_mount] = { | |
1169 | .name = "mount", | |
1170 | .mode = S_IFDIR | S_IRUGO | S_IXUGO, | |
1171 | }, | |
1172 | [RPCAUTH_nfs] = { | |
1173 | .name = "nfs", | |
1174 | .mode = S_IFDIR | S_IRUGO | S_IXUGO, | |
1175 | }, | |
1176 | [RPCAUTH_portmap] = { | |
1177 | .name = "portmap", | |
1178 | .mode = S_IFDIR | S_IRUGO | S_IXUGO, | |
1179 | }, | |
1180 | [RPCAUTH_statd] = { | |
1181 | .name = "statd", | |
1182 | .mode = S_IFDIR | S_IRUGO | S_IXUGO, | |
1183 | }, | |
1184 | [RPCAUTH_nfsd4_cb] = { | |
1185 | .name = "nfsd4_cb", | |
1186 | .mode = S_IFDIR | S_IRUGO | S_IXUGO, | |
1187 | }, | |
e571cbf1 TM |
1188 | [RPCAUTH_cache] = { |
1189 | .name = "cache", | |
1190 | .mode = S_IFDIR | S_IRUGO | S_IXUGO, | |
1191 | }, | |
b3537c35 JL |
1192 | [RPCAUTH_nfsd] = { |
1193 | .name = "nfsd", | |
1194 | .mode = S_IFDIR | S_IRUGO | S_IXUGO, | |
1195 | }, | |
4b9a445e JL |
1196 | [RPCAUTH_gssd] = { |
1197 | .name = "gssd", | |
1198 | .mode = S_IFDIR | S_IRUGO | S_IXUGO, | |
1199 | }, | |
bb156749 TM |
1200 | }; |
1201 | ||
432eb1a5 SK |
1202 | /* |
1203 | * This call can be used only in RPC pipefs mount notification hooks. | |
1204 | */ | |
1205 | struct dentry *rpc_d_lookup_sb(const struct super_block *sb, | |
1206 | const unsigned char *dir_name) | |
1207 | { | |
26fe5750 | 1208 | struct qstr dir = QSTR_INIT(dir_name, strlen(dir_name)); |
d3db90b0 | 1209 | return d_hash_and_lookup(sb->s_root, &dir); |
432eb1a5 SK |
1210 | } |
1211 | EXPORT_SYMBOL_GPL(rpc_d_lookup_sb); | |
1212 | ||
4b9a445e | 1213 | int rpc_pipefs_init_net(struct net *net) |
c21a588f SK |
1214 | { |
1215 | struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); | |
1216 | ||
4b9a445e JL |
1217 | sn->gssd_dummy = rpc_mkpipe_data(&gssd_dummy_pipe_ops, 0); |
1218 | if (IS_ERR(sn->gssd_dummy)) | |
1219 | return PTR_ERR(sn->gssd_dummy); | |
1220 | ||
c21a588f | 1221 | mutex_init(&sn->pipefs_sb_lock); |
2aed8b47 | 1222 | sn->pipe_version = -1; |
4b9a445e JL |
1223 | return 0; |
1224 | } | |
1225 | ||
1226 | void rpc_pipefs_exit_net(struct net *net) | |
1227 | { | |
1228 | struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); | |
1229 | ||
1230 | rpc_destroy_pipe_data(sn->gssd_dummy); | |
c21a588f SK |
1231 | } |
1232 | ||
1233 | /* | |
1234 | * This call will be used for per network namespace operations calls. | |
1235 | * Note: Function will be returned with pipefs_sb_lock taken if superblock was | |
1236 | * found. This lock have to be released by rpc_put_sb_net() when all operations | |
1237 | * will be completed. | |
1238 | */ | |
1239 | struct super_block *rpc_get_sb_net(const struct net *net) | |
1240 | { | |
1241 | struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); | |
1242 | ||
1243 | mutex_lock(&sn->pipefs_sb_lock); | |
1244 | if (sn->pipefs_sb) | |
1245 | return sn->pipefs_sb; | |
1246 | mutex_unlock(&sn->pipefs_sb_lock); | |
1247 | return NULL; | |
1248 | } | |
1249 | EXPORT_SYMBOL_GPL(rpc_get_sb_net); | |
1250 | ||
1251 | void rpc_put_sb_net(const struct net *net) | |
1252 | { | |
1253 | struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); | |
1254 | ||
749386e9 | 1255 | WARN_ON(sn->pipefs_sb == NULL); |
c21a588f SK |
1256 | mutex_unlock(&sn->pipefs_sb_lock); |
1257 | } | |
1258 | EXPORT_SYMBOL_GPL(rpc_put_sb_net); | |
1259 | ||
4b9a445e JL |
1260 | static const struct rpc_filelist gssd_dummy_clnt_dir[] = { |
1261 | [0] = { | |
1262 | .name = "clntXX", | |
1263 | .mode = S_IFDIR | S_IRUGO | S_IXUGO, | |
1264 | }, | |
1265 | }; | |
1266 | ||
1267 | static ssize_t | |
1268 | dummy_downcall(struct file *filp, const char __user *src, size_t len) | |
1269 | { | |
1270 | return -EINVAL; | |
1271 | } | |
1272 | ||
1273 | static const struct rpc_pipe_ops gssd_dummy_pipe_ops = { | |
1274 | .upcall = rpc_pipe_generic_upcall, | |
1275 | .downcall = dummy_downcall, | |
1276 | }; | |
1277 | ||
1278 | /** | |
1279 | * rpc_gssd_dummy_populate - create a dummy gssd pipe | |
1280 | * @root: root of the rpc_pipefs filesystem | |
1281 | * @pipe_data: pipe data created when netns is initialized | |
1282 | * | |
1283 | * Create a dummy set of directories and a pipe that gssd can hold open to | |
1284 | * indicate that it is up and running. | |
1285 | */ | |
1286 | static struct dentry * | |
1287 | rpc_gssd_dummy_populate(struct dentry *root, struct rpc_pipe *pipe_data) | |
1288 | { | |
1289 | int ret = 0; | |
1290 | struct dentry *gssd_dentry; | |
1291 | struct dentry *clnt_dentry = NULL; | |
1292 | struct dentry *pipe_dentry = NULL; | |
1293 | struct qstr q = QSTR_INIT(files[RPCAUTH_gssd].name, | |
1294 | strlen(files[RPCAUTH_gssd].name)); | |
1295 | ||
1296 | /* We should never get this far if "gssd" doesn't exist */ | |
1297 | gssd_dentry = d_hash_and_lookup(root, &q); | |
1298 | if (!gssd_dentry) | |
1299 | return ERR_PTR(-ENOENT); | |
1300 | ||
1301 | ret = rpc_populate(gssd_dentry, gssd_dummy_clnt_dir, 0, 1, NULL); | |
1302 | if (ret) { | |
1303 | pipe_dentry = ERR_PTR(ret); | |
1304 | goto out; | |
1305 | } | |
1306 | ||
1307 | q.name = gssd_dummy_clnt_dir[0].name; | |
1308 | q.len = strlen(gssd_dummy_clnt_dir[0].name); | |
1309 | clnt_dentry = d_hash_and_lookup(gssd_dentry, &q); | |
1310 | if (!clnt_dentry) { | |
1311 | pipe_dentry = ERR_PTR(-ENOENT); | |
1312 | goto out; | |
1313 | } | |
1314 | ||
1315 | pipe_dentry = rpc_mkpipe_dentry(clnt_dentry, "gssd", NULL, pipe_data); | |
3396f92f JL |
1316 | if (IS_ERR(pipe_dentry)) |
1317 | __rpc_depopulate(gssd_dentry, gssd_dummy_clnt_dir, 0, 1); | |
4b9a445e JL |
1318 | out: |
1319 | dput(clnt_dentry); | |
1320 | dput(gssd_dentry); | |
1321 | return pipe_dentry; | |
1322 | } | |
1323 | ||
1da177e4 LT |
1324 | static int |
1325 | rpc_fill_super(struct super_block *sb, void *data, int silent) | |
1326 | { | |
1327 | struct inode *inode; | |
4b9a445e | 1328 | struct dentry *root, *gssd_dentry; |
38b0da75 | 1329 | struct net *net = data; |
90c4e829 | 1330 | struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); |
2d00131a | 1331 | int err; |
1da177e4 LT |
1332 | |
1333 | sb->s_blocksize = PAGE_CACHE_SIZE; | |
1334 | sb->s_blocksize_bits = PAGE_CACHE_SHIFT; | |
1335 | sb->s_magic = RPCAUTH_GSSMAGIC; | |
1336 | sb->s_op = &s_ops; | |
b26d4cd3 | 1337 | sb->s_d_op = &simple_dentry_operations; |
1da177e4 LT |
1338 | sb->s_time_gran = 1; |
1339 | ||
7e450b4e | 1340 | inode = rpc_get_inode(sb, S_IFDIR | S_IRUGO | S_IXUGO); |
48fde701 AV |
1341 | sb->s_root = root = d_make_root(inode); |
1342 | if (!root) | |
1da177e4 | 1343 | return -ENOMEM; |
ac6fecee | 1344 | if (rpc_populate(root, files, RPCAUTH_lockd, RPCAUTH_RootEOF, NULL)) |
fc7bed8c | 1345 | return -ENOMEM; |
4b9a445e JL |
1346 | |
1347 | gssd_dentry = rpc_gssd_dummy_populate(root, sn->gssd_dummy); | |
1348 | if (IS_ERR(gssd_dentry)) { | |
1349 | __rpc_depopulate(root, files, RPCAUTH_lockd, RPCAUTH_RootEOF); | |
1350 | return PTR_ERR(gssd_dentry); | |
1351 | } | |
1352 | ||
d8af9bc1 CL |
1353 | dprintk("RPC: sending pipefs MOUNT notification for net %p%s\n", |
1354 | net, NET_NAME(net)); | |
38481605 | 1355 | mutex_lock(&sn->pipefs_sb_lock); |
37629b57 | 1356 | sn->pipefs_sb = sb; |
2d00131a SK |
1357 | err = blocking_notifier_call_chain(&rpc_pipefs_notifier_list, |
1358 | RPC_PIPEFS_MOUNT, | |
1359 | sb); | |
1360 | if (err) | |
1361 | goto err_depopulate; | |
021c68de | 1362 | sb->s_fs_info = get_net(net); |
38481605 | 1363 | mutex_unlock(&sn->pipefs_sb_lock); |
1da177e4 | 1364 | return 0; |
2d00131a SK |
1365 | |
1366 | err_depopulate: | |
4b9a445e | 1367 | dput(gssd_dentry); |
2d00131a SK |
1368 | blocking_notifier_call_chain(&rpc_pipefs_notifier_list, |
1369 | RPC_PIPEFS_UMOUNT, | |
1370 | sb); | |
37629b57 | 1371 | sn->pipefs_sb = NULL; |
2d00131a | 1372 | __rpc_depopulate(root, files, RPCAUTH_lockd, RPCAUTH_RootEOF); |
38481605 | 1373 | mutex_unlock(&sn->pipefs_sb_lock); |
2d00131a | 1374 | return err; |
1da177e4 LT |
1375 | } |
1376 | ||
89f84243 JL |
1377 | bool |
1378 | gssd_running(struct net *net) | |
1379 | { | |
1380 | struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); | |
1381 | struct rpc_pipe *pipe = sn->gssd_dummy; | |
1382 | ||
1383 | return pipe->nreaders || pipe->nwriters; | |
1384 | } | |
1385 | EXPORT_SYMBOL_GPL(gssd_running); | |
1386 | ||
fc14f2fe AV |
1387 | static struct dentry * |
1388 | rpc_mount(struct file_system_type *fs_type, | |
1389 | int flags, const char *dev_name, void *data) | |
1da177e4 | 1390 | { |
38b0da75 | 1391 | return mount_ns(fs_type, flags, current->nsproxy->net_ns, rpc_fill_super); |
1da177e4 LT |
1392 | } |
1393 | ||
09acfea5 | 1394 | static void rpc_kill_sb(struct super_block *sb) |
021c68de SK |
1395 | { |
1396 | struct net *net = sb->s_fs_info; | |
90c4e829 | 1397 | struct sunrpc_net *sn = net_generic(net, sunrpc_net_id); |
021c68de | 1398 | |
c21a588f | 1399 | mutex_lock(&sn->pipefs_sb_lock); |
642fe4d0 TM |
1400 | if (sn->pipefs_sb != sb) { |
1401 | mutex_unlock(&sn->pipefs_sb_lock); | |
1402 | goto out; | |
1403 | } | |
90c4e829 | 1404 | sn->pipefs_sb = NULL; |
d8af9bc1 CL |
1405 | dprintk("RPC: sending pipefs UMOUNT notification for net %p%s\n", |
1406 | net, NET_NAME(net)); | |
2d00131a SK |
1407 | blocking_notifier_call_chain(&rpc_pipefs_notifier_list, |
1408 | RPC_PIPEFS_UMOUNT, | |
1409 | sb); | |
adb6fa7f | 1410 | mutex_unlock(&sn->pipefs_sb_lock); |
642fe4d0 TM |
1411 | put_net(net); |
1412 | out: | |
021c68de | 1413 | kill_litter_super(sb); |
1da177e4 LT |
1414 | } |
1415 | ||
1416 | static struct file_system_type rpc_pipe_fs_type = { | |
1417 | .owner = THIS_MODULE, | |
1418 | .name = "rpc_pipefs", | |
fc14f2fe | 1419 | .mount = rpc_mount, |
021c68de | 1420 | .kill_sb = rpc_kill_sb, |
1da177e4 | 1421 | }; |
7f78e035 | 1422 | MODULE_ALIAS_FS("rpc_pipefs"); |
fa7614dd | 1423 | MODULE_ALIAS("rpc_pipefs"); |
1da177e4 LT |
1424 | |
1425 | static void | |
51cc5068 | 1426 | init_once(void *foo) |
1da177e4 LT |
1427 | { |
1428 | struct rpc_inode *rpci = (struct rpc_inode *) foo; | |
1429 | ||
a35afb83 CL |
1430 | inode_init_once(&rpci->vfs_inode); |
1431 | rpci->private = NULL; | |
ba9e0975 | 1432 | rpci->pipe = NULL; |
a35afb83 | 1433 | init_waitqueue_head(&rpci->waitq); |
1da177e4 LT |
1434 | } |
1435 | ||
1436 | int register_rpc_pipefs(void) | |
1437 | { | |
5bd5f581 AM |
1438 | int err; |
1439 | ||
1da177e4 | 1440 | rpc_inode_cachep = kmem_cache_create("rpc_inode_cache", |
fffb60f9 PJ |
1441 | sizeof(struct rpc_inode), |
1442 | 0, (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT| | |
1443 | SLAB_MEM_SPREAD), | |
20c2df83 | 1444 | init_once); |
1da177e4 LT |
1445 | if (!rpc_inode_cachep) |
1446 | return -ENOMEM; | |
80df9d20 SK |
1447 | err = rpc_clients_notifier_register(); |
1448 | if (err) | |
1449 | goto err_notifier; | |
5bd5f581 | 1450 | err = register_filesystem(&rpc_pipe_fs_type); |
80df9d20 SK |
1451 | if (err) |
1452 | goto err_register; | |
1da177e4 | 1453 | return 0; |
80df9d20 SK |
1454 | |
1455 | err_register: | |
1456 | rpc_clients_notifier_unregister(); | |
1457 | err_notifier: | |
1458 | kmem_cache_destroy(rpc_inode_cachep); | |
1459 | return err; | |
1da177e4 LT |
1460 | } |
1461 | ||
1462 | void unregister_rpc_pipefs(void) | |
1463 | { | |
80df9d20 | 1464 | rpc_clients_notifier_unregister(); |
1a1d92c1 | 1465 | kmem_cache_destroy(rpc_inode_cachep); |
1da177e4 LT |
1466 | unregister_filesystem(&rpc_pipe_fs_type); |
1467 | } |