blob: 3efe946672beb0b23cb7b7fbf0da79842b801cd5 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Chuck Lever19207232007-07-01 12:13:33 -04002 * In-kernel MOUNT protocol client
Linus Torvalds1da177e2005-04-16 15:20:36 -07003 *
4 * Copyright (C) 1997, Olaf Kirch <okir@monad.swb.de>
5 */
6
7#include <linux/types.h>
8#include <linux/socket.h>
9#include <linux/kernel.h>
10#include <linux/errno.h>
11#include <linux/uio.h>
12#include <linux/net.h>
13#include <linux/in.h>
14#include <linux/sunrpc/clnt.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070015#include <linux/sunrpc/sched.h>
16#include <linux/nfs_fs.h>
Steve Dickson84919452008-04-11 20:03:06 -040017#include "internal.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070018
Kinglong Mee39de4932015-09-24 20:57:03 +080019#define NFSDBG_FACILITY NFSDBG_MOUNT
Linus Torvalds1da177e2005-04-16 15:20:36 -070020
Chuck Lever2ad78092009-06-17 18:02:11 -070021/*
Chuck Lever29a1bd62009-06-17 18:02:11 -070022 * Defined by RFC 1094, section A.3; and RFC 1813, section 5.1.4
23 */
24#define MNTPATHLEN (1024)
25
26/*
27 * XDR data type sizes
28 */
29#define encode_dirpath_sz (1 + XDR_QUADLEN(MNTPATHLEN))
Chuck Leverfb125292009-06-17 18:02:12 -070030#define MNT_status_sz (1)
31#define MNT_fhs_status_sz (1)
Chuck Lever4fdcd992009-06-17 18:02:12 -070032#define MNT_fhandle_sz XDR_QUADLEN(NFS2_FHSIZE)
33#define MNT_fhandle3_sz (1 + XDR_QUADLEN(NFS3_FHSIZE))
Chuck Levera14017d2009-06-17 18:02:12 -070034#define MNT_authflav3_sz (1 + NFS_MAX_SECFLAVORS)
Chuck Lever29a1bd62009-06-17 18:02:11 -070035
36/*
37 * XDR argument and result sizes
38 */
39#define MNT_enc_dirpath_sz encode_dirpath_sz
Chuck Lever8e02f6b2009-06-17 18:02:13 -070040#define MNT_dec_mountres_sz (MNT_status_sz + MNT_fhandle_sz)
41#define MNT_dec_mountres3_sz (MNT_status_sz + MNT_fhandle_sz + \
42 MNT_authflav3_sz)
Chuck Lever29a1bd62009-06-17 18:02:11 -070043
44/*
Chuck Lever2ad78092009-06-17 18:02:11 -070045 * Defined by RFC 1094, section A.5
46 */
47enum {
48 MOUNTPROC_NULL = 0,
49 MOUNTPROC_MNT = 1,
50 MOUNTPROC_DUMP = 2,
51 MOUNTPROC_UMNT = 3,
52 MOUNTPROC_UMNTALL = 4,
53 MOUNTPROC_EXPORT = 5,
54};
55
56/*
57 * Defined by RFC 1813, section 5.2
58 */
59enum {
60 MOUNTPROC3_NULL = 0,
61 MOUNTPROC3_MNT = 1,
62 MOUNTPROC3_DUMP = 2,
63 MOUNTPROC3_UMNT = 3,
64 MOUNTPROC3_UMNTALL = 4,
65 MOUNTPROC3_EXPORT = 5,
66};
67
Trond Myklebusta613fa12012-01-20 13:53:56 -050068static const struct rpc_program mnt_program;
Linus Torvalds1da177e2005-04-16 15:20:36 -070069
Chuck Leverfb125292009-06-17 18:02:12 -070070/*
71 * Defined by OpenGroup XNFS Version 3W, chapter 8
72 */
73enum mountstat {
74 MNT_OK = 0,
75 MNT_EPERM = 1,
76 MNT_ENOENT = 2,
77 MNT_EACCES = 13,
78 MNT_EINVAL = 22,
79};
80
81static struct {
82 u32 status;
83 int errno;
84} mnt_errtbl[] = {
85 { .status = MNT_OK, .errno = 0, },
86 { .status = MNT_EPERM, .errno = -EPERM, },
87 { .status = MNT_ENOENT, .errno = -ENOENT, },
88 { .status = MNT_EACCES, .errno = -EACCES, },
89 { .status = MNT_EINVAL, .errno = -EINVAL, },
90};
91
92/*
93 * Defined by RFC 1813, section 5.1.5
94 */
95enum mountstat3 {
96 MNT3_OK = 0, /* no error */
97 MNT3ERR_PERM = 1, /* Not owner */
98 MNT3ERR_NOENT = 2, /* No such file or directory */
99 MNT3ERR_IO = 5, /* I/O error */
100 MNT3ERR_ACCES = 13, /* Permission denied */
101 MNT3ERR_NOTDIR = 20, /* Not a directory */
102 MNT3ERR_INVAL = 22, /* Invalid argument */
103 MNT3ERR_NAMETOOLONG = 63, /* Filename too long */
104 MNT3ERR_NOTSUPP = 10004, /* Operation not supported */
105 MNT3ERR_SERVERFAULT = 10006, /* A failure on the server */
106};
107
108static struct {
109 u32 status;
110 int errno;
111} mnt3_errtbl[] = {
112 { .status = MNT3_OK, .errno = 0, },
113 { .status = MNT3ERR_PERM, .errno = -EPERM, },
114 { .status = MNT3ERR_NOENT, .errno = -ENOENT, },
115 { .status = MNT3ERR_IO, .errno = -EIO, },
116 { .status = MNT3ERR_ACCES, .errno = -EACCES, },
117 { .status = MNT3ERR_NOTDIR, .errno = -ENOTDIR, },
118 { .status = MNT3ERR_INVAL, .errno = -EINVAL, },
119 { .status = MNT3ERR_NAMETOOLONG, .errno = -ENAMETOOLONG, },
120 { .status = MNT3ERR_NOTSUPP, .errno = -ENOTSUPP, },
Trond Myklebustfdcb4572010-02-08 09:32:40 -0500121 { .status = MNT3ERR_SERVERFAULT, .errno = -EREMOTEIO, },
Chuck Leverfb125292009-06-17 18:02:12 -0700122};
123
124struct mountres {
125 int errno;
126 struct nfs_fh *fh;
Chuck Levera14017d2009-06-17 18:02:12 -0700127 unsigned int *auth_count;
128 rpc_authflavor_t *auth_flavors;
Chuck Leverfb125292009-06-17 18:02:12 -0700129};
130
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131struct mnt_fhstatus {
Chuck Lever19207232007-07-01 12:13:33 -0400132 u32 status;
133 struct nfs_fh *fh;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134};
135
Chuck Lever3ea97302007-07-01 12:13:27 -0400136/**
137 * nfs_mount - Obtain an NFS file handle for the given host and path
Chuck Leverc5d120f2008-12-23 15:21:35 -0500138 * @info: pointer to mount request arguments
Chuck Lever3ea97302007-07-01 12:13:27 -0400139 *
Jeff Laytonfb9b02f2013-06-27 15:54:40 -0400140 * Uses default timeout parameters specified by underlying transport. On
141 * successful return, the auth_flavs list and auth_flav_len will be populated
142 * with the list from the server or a faked-up list if the server didn't
143 * provide one.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144 */
Chuck Leverc5d120f2008-12-23 15:21:35 -0500145int nfs_mount(struct nfs_mount_request *info)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146{
Chuck Lever8e02f6b2009-06-17 18:02:13 -0700147 struct mountres result = {
148 .fh = info->fh,
149 .auth_count = info->auth_flav_len,
150 .auth_flavors = info->auth_flavs,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151 };
Chuck Leverdead28d2006-03-20 13:44:23 -0500152 struct rpc_message msg = {
Chuck Leverc5d120f2008-12-23 15:21:35 -0500153 .rpc_argp = info->dirpath,
Chuck Leverdead28d2006-03-20 13:44:23 -0500154 .rpc_resp = &result,
155 };
Chuck Lever3ea97302007-07-01 12:13:27 -0400156 struct rpc_create_args args = {
Stanislav Kinsbursky6d59b8d2012-01-10 16:12:54 +0400157 .net = info->net,
Chuck Leverc5d120f2008-12-23 15:21:35 -0500158 .protocol = info->protocol,
159 .address = info->sap,
160 .addrsize = info->salen,
161 .servername = info->hostname,
Chuck Lever3ea97302007-07-01 12:13:27 -0400162 .program = &mnt_program,
Chuck Leverc5d120f2008-12-23 15:21:35 -0500163 .version = info->version,
Chuck Lever3ea97302007-07-01 12:13:27 -0400164 .authflavor = RPC_AUTH_UNIX,
Chuck Lever3ea97302007-07-01 12:13:27 -0400165 };
166 struct rpc_clnt *mnt_clnt;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167 int status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168
Chuck Lever3ea97302007-07-01 12:13:27 -0400169 dprintk("NFS: sending MNT request for %s:%s\n",
Chuck Leverc5d120f2008-12-23 15:21:35 -0500170 (info->hostname ? info->hostname : "server"),
171 info->dirpath);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172
Trond Myklebust28d79ea2012-10-15 16:25:42 -0400173 if (strlen(info->dirpath) > MNTPATHLEN)
174 return -ENAMETOOLONG;
175
Chuck Lever50a737f2008-12-23 15:21:37 -0500176 if (info->noresvport)
177 args.flags |= RPC_CLNT_CREATE_NONPRIVPORT;
178
Chuck Lever3ea97302007-07-01 12:13:27 -0400179 mnt_clnt = rpc_create(&args);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180 if (IS_ERR(mnt_clnt))
Chuck Lever013a8c12007-07-01 12:13:38 -0400181 goto out_clnt_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182
Chuck Leverc5d120f2008-12-23 15:21:35 -0500183 if (info->version == NFS_MNT3_VERSION)
Chuck Leverdead28d2006-03-20 13:44:23 -0500184 msg.rpc_proc = &mnt_clnt->cl_procinfo[MOUNTPROC3_MNT];
185 else
Chuck Lever2ad78092009-06-17 18:02:11 -0700186 msg.rpc_proc = &mnt_clnt->cl_procinfo[MOUNTPROC_MNT];
Chuck Leverdead28d2006-03-20 13:44:23 -0500187
Scott Mayhewacce94e2012-10-16 13:22:19 -0400188 status = rpc_call_sync(mnt_clnt, &msg, RPC_TASK_SOFT|RPC_TASK_TIMEOUT);
Trond Myklebust90c57552007-06-09 19:49:36 -0400189 rpc_shutdown_client(mnt_clnt);
Chuck Lever013a8c12007-07-01 12:13:38 -0400190
191 if (status < 0)
192 goto out_call_err;
Chuck Lever8e02f6b2009-06-17 18:02:13 -0700193 if (result.errno != 0)
Chuck Lever013a8c12007-07-01 12:13:38 -0400194 goto out_mnt_err;
195
196 dprintk("NFS: MNT request succeeded\n");
197 status = 0;
198
Jeff Laytonfb9b02f2013-06-27 15:54:40 -0400199 /*
200 * If the server didn't provide a flavor list, allow the
201 * client to try any flavor.
202 */
203 if (info->version != NFS_MNT3_VERSION || *info->auth_flav_len == 0) {
204 dprintk("NFS: Faking up auth_flavs list\n");
205 info->auth_flavs[0] = RPC_AUTH_NULL;
206 *info->auth_flav_len = 1;
207 }
Chuck Lever013a8c12007-07-01 12:13:38 -0400208out:
209 return status;
210
211out_clnt_err:
212 status = PTR_ERR(mnt_clnt);
Chuck Lever8e02f6b2009-06-17 18:02:13 -0700213 dprintk("NFS: failed to create MNT RPC client, status=%d\n", status);
Chuck Lever013a8c12007-07-01 12:13:38 -0400214 goto out;
215
216out_call_err:
Chuck Lever8e02f6b2009-06-17 18:02:13 -0700217 dprintk("NFS: MNT request failed, status=%d\n", status);
Chuck Lever013a8c12007-07-01 12:13:38 -0400218 goto out;
219
220out_mnt_err:
Chuck Lever8e02f6b2009-06-17 18:02:13 -0700221 dprintk("NFS: MNT server returned result %d\n", result.errno);
222 status = result.errno;
Chuck Lever013a8c12007-07-01 12:13:38 -0400223 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224}
225
Chuck Lever0b524122009-08-09 15:09:30 -0400226/**
227 * nfs_umount - Notify a server that we have unmounted this export
228 * @info: pointer to umount request arguments
229 *
230 * MOUNTPROC_UMNT is advisory, so we set a short timeout, and always
231 * use UDP.
232 */
233void nfs_umount(const struct nfs_mount_request *info)
234{
235 static const struct rpc_timeout nfs_umnt_timeout = {
236 .to_initval = 1 * HZ,
237 .to_maxval = 3 * HZ,
238 .to_retries = 2,
239 };
240 struct rpc_create_args args = {
Stanislav Kinsbursky6d59b8d2012-01-10 16:12:54 +0400241 .net = info->net,
Chuck Lever0b524122009-08-09 15:09:30 -0400242 .protocol = IPPROTO_UDP,
243 .address = info->sap,
244 .addrsize = info->salen,
245 .timeout = &nfs_umnt_timeout,
246 .servername = info->hostname,
247 .program = &mnt_program,
248 .version = info->version,
249 .authflavor = RPC_AUTH_UNIX,
250 .flags = RPC_CLNT_CREATE_NOPING,
251 };
Chuck Lever0b524122009-08-09 15:09:30 -0400252 struct rpc_message msg = {
253 .rpc_argp = info->dirpath,
Chuck Lever0b524122009-08-09 15:09:30 -0400254 };
255 struct rpc_clnt *clnt;
256 int status;
257
Trond Myklebust28d79ea2012-10-15 16:25:42 -0400258 if (strlen(info->dirpath) > MNTPATHLEN)
259 return;
260
Chuck Lever0b524122009-08-09 15:09:30 -0400261 if (info->noresvport)
262 args.flags |= RPC_CLNT_CREATE_NONPRIVPORT;
263
264 clnt = rpc_create(&args);
Tobias Klauserc8b031e2010-12-09 15:53:28 +0100265 if (IS_ERR(clnt))
Chuck Lever0b524122009-08-09 15:09:30 -0400266 goto out_clnt_err;
267
268 dprintk("NFS: sending UMNT request for %s:%s\n",
269 (info->hostname ? info->hostname : "server"), info->dirpath);
270
271 if (info->version == NFS_MNT3_VERSION)
272 msg.rpc_proc = &clnt->cl_procinfo[MOUNTPROC3_UMNT];
273 else
274 msg.rpc_proc = &clnt->cl_procinfo[MOUNTPROC_UMNT];
275
276 status = rpc_call_sync(clnt, &msg, 0);
277 rpc_shutdown_client(clnt);
278
279 if (unlikely(status < 0))
280 goto out_call_err;
281
282 return;
283
284out_clnt_err:
285 dprintk("NFS: failed to create UMNT RPC client, status=%ld\n",
286 PTR_ERR(clnt));
287 return;
288
289out_call_err:
290 dprintk("NFS: UMNT request failed, status=%d\n", status);
291}
292
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293/*
294 * XDR encode/decode functions for MOUNT
295 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296
Chuck Lever98eb2b42010-12-14 14:58:40 +0000297static void encode_mntdirpath(struct xdr_stream *xdr, const char *pathname)
Chuck Lever29a1bd62009-06-17 18:02:11 -0700298{
299 const u32 pathname_len = strlen(pathname);
300 __be32 *p;
301
Chuck Lever98eb2b42010-12-14 14:58:40 +0000302 p = xdr_reserve_space(xdr, 4 + pathname_len);
Chuck Lever29a1bd62009-06-17 18:02:11 -0700303 xdr_encode_opaque(p, pathname, pathname_len);
Chuck Lever29a1bd62009-06-17 18:02:11 -0700304}
305
Chuck Lever9f06c712010-12-14 14:59:18 +0000306static void mnt_xdr_enc_dirpath(struct rpc_rqst *req, struct xdr_stream *xdr,
Christoph Hellwig0096d392017-05-08 10:01:49 +0200307 const void *dirpath)
Chuck Lever29a1bd62009-06-17 18:02:11 -0700308{
Chuck Lever9f06c712010-12-14 14:59:18 +0000309 encode_mntdirpath(xdr, dirpath);
Chuck Lever29a1bd62009-06-17 18:02:11 -0700310}
311
Chuck Leverfb125292009-06-17 18:02:12 -0700312/*
313 * RFC 1094: "A non-zero status indicates some sort of error. In this
314 * case, the status is a UNIX error number." This can be problematic
315 * if the server and client use different errno values for the same
316 * error.
317 *
318 * However, the OpenGroup XNFS spec provides a simple mapping that is
319 * independent of local errno values on the server and the client.
320 */
321static int decode_status(struct xdr_stream *xdr, struct mountres *res)
322{
323 unsigned int i;
324 u32 status;
325 __be32 *p;
326
Chuck Lever98eb2b42010-12-14 14:58:40 +0000327 p = xdr_inline_decode(xdr, 4);
Chuck Leverfb125292009-06-17 18:02:12 -0700328 if (unlikely(p == NULL))
329 return -EIO;
Chuck Lever98eb2b42010-12-14 14:58:40 +0000330 status = be32_to_cpup(p);
Chuck Leverfb125292009-06-17 18:02:12 -0700331
Roel Kluindd8ac1d2009-08-09 15:06:19 -0400332 for (i = 0; i < ARRAY_SIZE(mnt_errtbl); i++) {
Chuck Leverfb125292009-06-17 18:02:12 -0700333 if (mnt_errtbl[i].status == status) {
334 res->errno = mnt_errtbl[i].errno;
335 return 0;
336 }
337 }
338
339 dprintk("NFS: unrecognized MNT status code: %u\n", status);
340 res->errno = -EACCES;
341 return 0;
342}
343
Chuck Lever4fdcd992009-06-17 18:02:12 -0700344static int decode_fhandle(struct xdr_stream *xdr, struct mountres *res)
345{
346 struct nfs_fh *fh = res->fh;
347 __be32 *p;
348
349 p = xdr_inline_decode(xdr, NFS2_FHSIZE);
350 if (unlikely(p == NULL))
351 return -EIO;
352
353 fh->size = NFS2_FHSIZE;
354 memcpy(fh->data, p, NFS2_FHSIZE);
355 return 0;
356}
357
Chuck Leverbf269552010-12-14 14:59:29 +0000358static int mnt_xdr_dec_mountres(struct rpc_rqst *req,
359 struct xdr_stream *xdr,
Christoph Hellwig18d9cff2017-05-08 15:09:02 +0200360 void *data)
Chuck Lever8e02f6b2009-06-17 18:02:13 -0700361{
Christoph Hellwig18d9cff2017-05-08 15:09:02 +0200362 struct mountres *res = data;
Chuck Lever8e02f6b2009-06-17 18:02:13 -0700363 int status;
364
Chuck Leverbf269552010-12-14 14:59:29 +0000365 status = decode_status(xdr, res);
Chuck Lever8e02f6b2009-06-17 18:02:13 -0700366 if (unlikely(status != 0 || res->errno != 0))
367 return status;
Chuck Leverbf269552010-12-14 14:59:29 +0000368 return decode_fhandle(xdr, res);
Chuck Lever8e02f6b2009-06-17 18:02:13 -0700369}
370
Chuck Leverfb125292009-06-17 18:02:12 -0700371static int decode_fhs_status(struct xdr_stream *xdr, struct mountres *res)
372{
373 unsigned int i;
374 u32 status;
375 __be32 *p;
376
Chuck Lever98eb2b42010-12-14 14:58:40 +0000377 p = xdr_inline_decode(xdr, 4);
Chuck Leverfb125292009-06-17 18:02:12 -0700378 if (unlikely(p == NULL))
379 return -EIO;
Chuck Lever98eb2b42010-12-14 14:58:40 +0000380 status = be32_to_cpup(p);
Chuck Leverfb125292009-06-17 18:02:12 -0700381
Roel Kluindd8ac1d2009-08-09 15:06:19 -0400382 for (i = 0; i < ARRAY_SIZE(mnt3_errtbl); i++) {
Chuck Leverfb125292009-06-17 18:02:12 -0700383 if (mnt3_errtbl[i].status == status) {
384 res->errno = mnt3_errtbl[i].errno;
385 return 0;
386 }
387 }
388
389 dprintk("NFS: unrecognized MNT3 status code: %u\n", status);
390 res->errno = -EACCES;
391 return 0;
392}
393
Chuck Lever4fdcd992009-06-17 18:02:12 -0700394static int decode_fhandle3(struct xdr_stream *xdr, struct mountres *res)
395{
396 struct nfs_fh *fh = res->fh;
397 u32 size;
398 __be32 *p;
399
Chuck Lever98eb2b42010-12-14 14:58:40 +0000400 p = xdr_inline_decode(xdr, 4);
Chuck Lever4fdcd992009-06-17 18:02:12 -0700401 if (unlikely(p == NULL))
402 return -EIO;
403
Chuck Lever98eb2b42010-12-14 14:58:40 +0000404 size = be32_to_cpup(p);
Chuck Lever4fdcd992009-06-17 18:02:12 -0700405 if (size > NFS3_FHSIZE || size == 0)
406 return -EIO;
407
408 p = xdr_inline_decode(xdr, size);
409 if (unlikely(p == NULL))
410 return -EIO;
411
412 fh->size = size;
413 memcpy(fh->data, p, size);
414 return 0;
415}
416
Chuck Levera14017d2009-06-17 18:02:12 -0700417static int decode_auth_flavors(struct xdr_stream *xdr, struct mountres *res)
418{
419 rpc_authflavor_t *flavors = res->auth_flavors;
420 unsigned int *count = res->auth_count;
421 u32 entries, i;
422 __be32 *p;
423
424 if (*count == 0)
425 return 0;
426
Chuck Lever98eb2b42010-12-14 14:58:40 +0000427 p = xdr_inline_decode(xdr, 4);
Chuck Levera14017d2009-06-17 18:02:12 -0700428 if (unlikely(p == NULL))
429 return -EIO;
Chuck Lever98eb2b42010-12-14 14:58:40 +0000430 entries = be32_to_cpup(p);
Chuck Levera14017d2009-06-17 18:02:12 -0700431 dprintk("NFS: received %u auth flavors\n", entries);
432 if (entries > NFS_MAX_SECFLAVORS)
433 entries = NFS_MAX_SECFLAVORS;
434
Chuck Lever98eb2b42010-12-14 14:58:40 +0000435 p = xdr_inline_decode(xdr, 4 * entries);
Chuck Levera14017d2009-06-17 18:02:12 -0700436 if (unlikely(p == NULL))
437 return -EIO;
438
439 if (entries > *count)
440 entries = *count;
441
442 for (i = 0; i < entries; i++) {
Chuck Lever98eb2b42010-12-14 14:58:40 +0000443 flavors[i] = be32_to_cpup(p++);
Chuck Levered58b292010-09-17 10:54:37 -0400444 dprintk("NFS: auth flavor[%u]: %d\n", i, flavors[i]);
Chuck Levera14017d2009-06-17 18:02:12 -0700445 }
446 *count = i;
447
448 return 0;
449}
450
Chuck Leverbf269552010-12-14 14:59:29 +0000451static int mnt_xdr_dec_mountres3(struct rpc_rqst *req,
452 struct xdr_stream *xdr,
Christoph Hellwig18d9cff2017-05-08 15:09:02 +0200453 void *data)
Chuck Lever8e02f6b2009-06-17 18:02:13 -0700454{
Christoph Hellwig18d9cff2017-05-08 15:09:02 +0200455 struct mountres *res = data;
Chuck Lever8e02f6b2009-06-17 18:02:13 -0700456 int status;
457
Chuck Leverbf269552010-12-14 14:59:29 +0000458 status = decode_fhs_status(xdr, res);
Chuck Lever8e02f6b2009-06-17 18:02:13 -0700459 if (unlikely(status != 0 || res->errno != 0))
460 return status;
Chuck Leverbf269552010-12-14 14:59:29 +0000461 status = decode_fhandle3(xdr, res);
Chuck Lever8e02f6b2009-06-17 18:02:13 -0700462 if (unlikely(status != 0)) {
463 res->errno = -EBADHANDLE;
464 return 0;
465 }
Chuck Leverbf269552010-12-14 14:59:29 +0000466 return decode_auth_flavors(xdr, res);
Chuck Lever8e02f6b2009-06-17 18:02:13 -0700467}
468
Christoph Hellwig499b4982017-05-12 15:36:49 +0200469static const struct rpc_procinfo mnt_procedures[] = {
Chuck Lever2ad78092009-06-17 18:02:11 -0700470 [MOUNTPROC_MNT] = {
471 .p_proc = MOUNTPROC_MNT,
Christoph Hellwig0096d392017-05-08 10:01:49 +0200472 .p_encode = mnt_xdr_enc_dirpath,
Christoph Hellwig18d9cff2017-05-08 15:09:02 +0200473 .p_decode = mnt_xdr_dec_mountres,
Chuck Lever29a1bd62009-06-17 18:02:11 -0700474 .p_arglen = MNT_enc_dirpath_sz,
Chuck Lever8e02f6b2009-06-17 18:02:13 -0700475 .p_replen = MNT_dec_mountres_sz,
Chuck Lever2ad78092009-06-17 18:02:11 -0700476 .p_statidx = MOUNTPROC_MNT,
Chuck Lever19207232007-07-01 12:13:33 -0400477 .p_name = "MOUNT",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478 },
Chuck Lever0b524122009-08-09 15:09:30 -0400479 [MOUNTPROC_UMNT] = {
480 .p_proc = MOUNTPROC_UMNT,
Christoph Hellwig0096d392017-05-08 10:01:49 +0200481 .p_encode = mnt_xdr_enc_dirpath,
Chuck Lever0b524122009-08-09 15:09:30 -0400482 .p_arglen = MNT_enc_dirpath_sz,
483 .p_statidx = MOUNTPROC_UMNT,
484 .p_name = "UMOUNT",
485 },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700486};
487
Christoph Hellwig499b4982017-05-12 15:36:49 +0200488static const struct rpc_procinfo mnt3_procedures[] = {
Chuck Lever19207232007-07-01 12:13:33 -0400489 [MOUNTPROC3_MNT] = {
490 .p_proc = MOUNTPROC3_MNT,
Christoph Hellwig0096d392017-05-08 10:01:49 +0200491 .p_encode = mnt_xdr_enc_dirpath,
Christoph Hellwig18d9cff2017-05-08 15:09:02 +0200492 .p_decode = mnt_xdr_dec_mountres3,
Chuck Lever29a1bd62009-06-17 18:02:11 -0700493 .p_arglen = MNT_enc_dirpath_sz,
Chuck Lever8e02f6b2009-06-17 18:02:13 -0700494 .p_replen = MNT_dec_mountres3_sz,
Chuck Lever19207232007-07-01 12:13:33 -0400495 .p_statidx = MOUNTPROC3_MNT,
496 .p_name = "MOUNT",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700497 },
Chuck Lever0b524122009-08-09 15:09:30 -0400498 [MOUNTPROC3_UMNT] = {
499 .p_proc = MOUNTPROC3_UMNT,
Christoph Hellwig0096d392017-05-08 10:01:49 +0200500 .p_encode = mnt_xdr_enc_dirpath,
Chuck Lever0b524122009-08-09 15:09:30 -0400501 .p_arglen = MNT_enc_dirpath_sz,
502 .p_statidx = MOUNTPROC3_UMNT,
503 .p_name = "UMOUNT",
504 },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505};
506
Christoph Hellwig1c5876d2017-05-08 23:27:10 +0200507static unsigned int mnt_counts[ARRAY_SIZE(mnt_procedures)];
Trond Myklebusta613fa12012-01-20 13:53:56 -0500508static const struct rpc_version mnt_version1 = {
Chuck Lever19207232007-07-01 12:13:33 -0400509 .number = 1,
Chuck Lever5b362ac2010-12-10 12:31:14 -0500510 .nrprocs = ARRAY_SIZE(mnt_procedures),
Chuck Lever19207232007-07-01 12:13:33 -0400511 .procs = mnt_procedures,
Christoph Hellwig1c5876d2017-05-08 23:27:10 +0200512 .counts = mnt_counts,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513};
514
Christoph Hellwig1c5876d2017-05-08 23:27:10 +0200515static unsigned int mnt3_counts[ARRAY_SIZE(mnt_procedures)];
Trond Myklebusta613fa12012-01-20 13:53:56 -0500516static const struct rpc_version mnt_version3 = {
Chuck Lever19207232007-07-01 12:13:33 -0400517 .number = 3,
Chuck Lever5b362ac2010-12-10 12:31:14 -0500518 .nrprocs = ARRAY_SIZE(mnt3_procedures),
Chuck Lever19207232007-07-01 12:13:33 -0400519 .procs = mnt3_procedures,
Christoph Hellwig1c5876d2017-05-08 23:27:10 +0200520 .counts = mnt3_counts,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700521};
522
Trond Myklebusta613fa12012-01-20 13:53:56 -0500523static const struct rpc_version *mnt_version[] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700524 NULL,
525 &mnt_version1,
526 NULL,
527 &mnt_version3,
528};
529
Chuck Lever19207232007-07-01 12:13:33 -0400530static struct rpc_stat mnt_stats;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700531
Trond Myklebusta613fa12012-01-20 13:53:56 -0500532static const struct rpc_program mnt_program = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533 .name = "mount",
534 .number = NFS_MNT_PROGRAM,
Tobias Klausere8c96f82006-03-24 03:15:34 -0800535 .nrvers = ARRAY_SIZE(mnt_version),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700536 .version = mnt_version,
537 .stats = &mnt_stats,
538};