Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Chuck Lever | 1920723 | 2007-07-01 12:13:33 -0400 | [diff] [blame] | 2 | * In-kernel MOUNT protocol client |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * |
| 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | #include <linux/sunrpc/sched.h> |
| 16 | #include <linux/nfs_fs.h> |
Steve Dickson | 8491945 | 2008-04-11 20:03:06 -0400 | [diff] [blame] | 17 | #include "internal.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | |
| 19 | #ifdef RPC_DEBUG |
Chuck Lever | 3ea9730 | 2007-07-01 12:13:27 -0400 | [diff] [blame] | 20 | # define NFSDBG_FACILITY NFSDBG_MOUNT |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | #endif |
| 22 | |
Chuck Lever | 2ad7809 | 2009-06-17 18:02:11 -0700 | [diff] [blame] | 23 | /* |
Chuck Lever | 29a1bd6 | 2009-06-17 18:02:11 -0700 | [diff] [blame] | 24 | * Defined by RFC 1094, section A.3; and RFC 1813, section 5.1.4 |
| 25 | */ |
| 26 | #define MNTPATHLEN (1024) |
| 27 | |
| 28 | /* |
| 29 | * XDR data type sizes |
| 30 | */ |
| 31 | #define encode_dirpath_sz (1 + XDR_QUADLEN(MNTPATHLEN)) |
Chuck Lever | fb12529 | 2009-06-17 18:02:12 -0700 | [diff] [blame] | 32 | #define MNT_status_sz (1) |
| 33 | #define MNT_fhs_status_sz (1) |
Chuck Lever | 4fdcd99 | 2009-06-17 18:02:12 -0700 | [diff] [blame] | 34 | #define MNT_fhandle_sz XDR_QUADLEN(NFS2_FHSIZE) |
| 35 | #define MNT_fhandle3_sz (1 + XDR_QUADLEN(NFS3_FHSIZE)) |
Chuck Lever | a14017d | 2009-06-17 18:02:12 -0700 | [diff] [blame] | 36 | #define MNT_authflav3_sz (1 + NFS_MAX_SECFLAVORS) |
Chuck Lever | 29a1bd6 | 2009-06-17 18:02:11 -0700 | [diff] [blame] | 37 | |
| 38 | /* |
| 39 | * XDR argument and result sizes |
| 40 | */ |
| 41 | #define MNT_enc_dirpath_sz encode_dirpath_sz |
Chuck Lever | 8e02f6b | 2009-06-17 18:02:13 -0700 | [diff] [blame] | 42 | #define MNT_dec_mountres_sz (MNT_status_sz + MNT_fhandle_sz) |
| 43 | #define MNT_dec_mountres3_sz (MNT_status_sz + MNT_fhandle_sz + \ |
| 44 | MNT_authflav3_sz) |
Chuck Lever | 29a1bd6 | 2009-06-17 18:02:11 -0700 | [diff] [blame] | 45 | |
| 46 | /* |
Chuck Lever | 2ad7809 | 2009-06-17 18:02:11 -0700 | [diff] [blame] | 47 | * Defined by RFC 1094, section A.5 |
| 48 | */ |
| 49 | enum { |
| 50 | MOUNTPROC_NULL = 0, |
| 51 | MOUNTPROC_MNT = 1, |
| 52 | MOUNTPROC_DUMP = 2, |
| 53 | MOUNTPROC_UMNT = 3, |
| 54 | MOUNTPROC_UMNTALL = 4, |
| 55 | MOUNTPROC_EXPORT = 5, |
| 56 | }; |
| 57 | |
| 58 | /* |
| 59 | * Defined by RFC 1813, section 5.2 |
| 60 | */ |
| 61 | enum { |
| 62 | MOUNTPROC3_NULL = 0, |
| 63 | MOUNTPROC3_MNT = 1, |
| 64 | MOUNTPROC3_DUMP = 2, |
| 65 | MOUNTPROC3_UMNT = 3, |
| 66 | MOUNTPROC3_UMNTALL = 4, |
| 67 | MOUNTPROC3_EXPORT = 5, |
| 68 | }; |
| 69 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | static struct rpc_program mnt_program; |
| 71 | |
Chuck Lever | fb12529 | 2009-06-17 18:02:12 -0700 | [diff] [blame] | 72 | /* |
| 73 | * Defined by OpenGroup XNFS Version 3W, chapter 8 |
| 74 | */ |
| 75 | enum mountstat { |
| 76 | MNT_OK = 0, |
| 77 | MNT_EPERM = 1, |
| 78 | MNT_ENOENT = 2, |
| 79 | MNT_EACCES = 13, |
| 80 | MNT_EINVAL = 22, |
| 81 | }; |
| 82 | |
| 83 | static struct { |
| 84 | u32 status; |
| 85 | int errno; |
| 86 | } mnt_errtbl[] = { |
| 87 | { .status = MNT_OK, .errno = 0, }, |
| 88 | { .status = MNT_EPERM, .errno = -EPERM, }, |
| 89 | { .status = MNT_ENOENT, .errno = -ENOENT, }, |
| 90 | { .status = MNT_EACCES, .errno = -EACCES, }, |
| 91 | { .status = MNT_EINVAL, .errno = -EINVAL, }, |
| 92 | }; |
| 93 | |
| 94 | /* |
| 95 | * Defined by RFC 1813, section 5.1.5 |
| 96 | */ |
| 97 | enum mountstat3 { |
| 98 | MNT3_OK = 0, /* no error */ |
| 99 | MNT3ERR_PERM = 1, /* Not owner */ |
| 100 | MNT3ERR_NOENT = 2, /* No such file or directory */ |
| 101 | MNT3ERR_IO = 5, /* I/O error */ |
| 102 | MNT3ERR_ACCES = 13, /* Permission denied */ |
| 103 | MNT3ERR_NOTDIR = 20, /* Not a directory */ |
| 104 | MNT3ERR_INVAL = 22, /* Invalid argument */ |
| 105 | MNT3ERR_NAMETOOLONG = 63, /* Filename too long */ |
| 106 | MNT3ERR_NOTSUPP = 10004, /* Operation not supported */ |
| 107 | MNT3ERR_SERVERFAULT = 10006, /* A failure on the server */ |
| 108 | }; |
| 109 | |
| 110 | static struct { |
| 111 | u32 status; |
| 112 | int errno; |
| 113 | } mnt3_errtbl[] = { |
| 114 | { .status = MNT3_OK, .errno = 0, }, |
| 115 | { .status = MNT3ERR_PERM, .errno = -EPERM, }, |
| 116 | { .status = MNT3ERR_NOENT, .errno = -ENOENT, }, |
| 117 | { .status = MNT3ERR_IO, .errno = -EIO, }, |
| 118 | { .status = MNT3ERR_ACCES, .errno = -EACCES, }, |
| 119 | { .status = MNT3ERR_NOTDIR, .errno = -ENOTDIR, }, |
| 120 | { .status = MNT3ERR_INVAL, .errno = -EINVAL, }, |
| 121 | { .status = MNT3ERR_NAMETOOLONG, .errno = -ENAMETOOLONG, }, |
| 122 | { .status = MNT3ERR_NOTSUPP, .errno = -ENOTSUPP, }, |
Trond Myklebust | fdcb457 | 2010-02-08 09:32:40 -0500 | [diff] [blame] | 123 | { .status = MNT3ERR_SERVERFAULT, .errno = -EREMOTEIO, }, |
Chuck Lever | fb12529 | 2009-06-17 18:02:12 -0700 | [diff] [blame] | 124 | }; |
| 125 | |
| 126 | struct mountres { |
| 127 | int errno; |
| 128 | struct nfs_fh *fh; |
Chuck Lever | a14017d | 2009-06-17 18:02:12 -0700 | [diff] [blame] | 129 | unsigned int *auth_count; |
| 130 | rpc_authflavor_t *auth_flavors; |
Chuck Lever | fb12529 | 2009-06-17 18:02:12 -0700 | [diff] [blame] | 131 | }; |
| 132 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | struct mnt_fhstatus { |
Chuck Lever | 1920723 | 2007-07-01 12:13:33 -0400 | [diff] [blame] | 134 | u32 status; |
| 135 | struct nfs_fh *fh; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | }; |
| 137 | |
Chuck Lever | 3ea9730 | 2007-07-01 12:13:27 -0400 | [diff] [blame] | 138 | /** |
| 139 | * nfs_mount - Obtain an NFS file handle for the given host and path |
Chuck Lever | c5d120f | 2008-12-23 15:21:35 -0500 | [diff] [blame] | 140 | * @info: pointer to mount request arguments |
Chuck Lever | 3ea9730 | 2007-07-01 12:13:27 -0400 | [diff] [blame] | 141 | * |
| 142 | * Uses default timeout parameters specified by underlying transport. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | */ |
Chuck Lever | c5d120f | 2008-12-23 15:21:35 -0500 | [diff] [blame] | 144 | int nfs_mount(struct nfs_mount_request *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | { |
Chuck Lever | 8e02f6b | 2009-06-17 18:02:13 -0700 | [diff] [blame] | 146 | struct mountres result = { |
| 147 | .fh = info->fh, |
| 148 | .auth_count = info->auth_flav_len, |
| 149 | .auth_flavors = info->auth_flavs, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | }; |
Chuck Lever | dead28d | 2006-03-20 13:44:23 -0500 | [diff] [blame] | 151 | struct rpc_message msg = { |
Chuck Lever | c5d120f | 2008-12-23 15:21:35 -0500 | [diff] [blame] | 152 | .rpc_argp = info->dirpath, |
Chuck Lever | dead28d | 2006-03-20 13:44:23 -0500 | [diff] [blame] | 153 | .rpc_resp = &result, |
| 154 | }; |
Chuck Lever | 3ea9730 | 2007-07-01 12:13:27 -0400 | [diff] [blame] | 155 | struct rpc_create_args args = { |
Pavel Emelyanov | c653ce3 | 2010-09-29 16:04:45 +0400 | [diff] [blame] | 156 | .net = &init_net, |
Chuck Lever | c5d120f | 2008-12-23 15:21:35 -0500 | [diff] [blame] | 157 | .protocol = info->protocol, |
| 158 | .address = info->sap, |
| 159 | .addrsize = info->salen, |
| 160 | .servername = info->hostname, |
Chuck Lever | 3ea9730 | 2007-07-01 12:13:27 -0400 | [diff] [blame] | 161 | .program = &mnt_program, |
Chuck Lever | c5d120f | 2008-12-23 15:21:35 -0500 | [diff] [blame] | 162 | .version = info->version, |
Chuck Lever | 3ea9730 | 2007-07-01 12:13:27 -0400 | [diff] [blame] | 163 | .authflavor = RPC_AUTH_UNIX, |
Chuck Lever | 3ea9730 | 2007-07-01 12:13:27 -0400 | [diff] [blame] | 164 | }; |
| 165 | struct rpc_clnt *mnt_clnt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | int status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | |
Chuck Lever | 3ea9730 | 2007-07-01 12:13:27 -0400 | [diff] [blame] | 168 | dprintk("NFS: sending MNT request for %s:%s\n", |
Chuck Lever | c5d120f | 2008-12-23 15:21:35 -0500 | [diff] [blame] | 169 | (info->hostname ? info->hostname : "server"), |
| 170 | info->dirpath); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | |
Chuck Lever | 50a737f | 2008-12-23 15:21:37 -0500 | [diff] [blame] | 172 | if (info->noresvport) |
| 173 | args.flags |= RPC_CLNT_CREATE_NONPRIVPORT; |
| 174 | |
Chuck Lever | 3ea9730 | 2007-07-01 12:13:27 -0400 | [diff] [blame] | 175 | mnt_clnt = rpc_create(&args); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | if (IS_ERR(mnt_clnt)) |
Chuck Lever | 013a8c1 | 2007-07-01 12:13:38 -0400 | [diff] [blame] | 177 | goto out_clnt_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | |
Chuck Lever | c5d120f | 2008-12-23 15:21:35 -0500 | [diff] [blame] | 179 | if (info->version == NFS_MNT3_VERSION) |
Chuck Lever | dead28d | 2006-03-20 13:44:23 -0500 | [diff] [blame] | 180 | msg.rpc_proc = &mnt_clnt->cl_procinfo[MOUNTPROC3_MNT]; |
| 181 | else |
Chuck Lever | 2ad7809 | 2009-06-17 18:02:11 -0700 | [diff] [blame] | 182 | msg.rpc_proc = &mnt_clnt->cl_procinfo[MOUNTPROC_MNT]; |
Chuck Lever | dead28d | 2006-03-20 13:44:23 -0500 | [diff] [blame] | 183 | |
| 184 | status = rpc_call_sync(mnt_clnt, &msg, 0); |
Trond Myklebust | 90c5755 | 2007-06-09 19:49:36 -0400 | [diff] [blame] | 185 | rpc_shutdown_client(mnt_clnt); |
Chuck Lever | 013a8c1 | 2007-07-01 12:13:38 -0400 | [diff] [blame] | 186 | |
| 187 | if (status < 0) |
| 188 | goto out_call_err; |
Chuck Lever | 8e02f6b | 2009-06-17 18:02:13 -0700 | [diff] [blame] | 189 | if (result.errno != 0) |
Chuck Lever | 013a8c1 | 2007-07-01 12:13:38 -0400 | [diff] [blame] | 190 | goto out_mnt_err; |
| 191 | |
| 192 | dprintk("NFS: MNT request succeeded\n"); |
| 193 | status = 0; |
| 194 | |
| 195 | out: |
| 196 | return status; |
| 197 | |
| 198 | out_clnt_err: |
| 199 | status = PTR_ERR(mnt_clnt); |
Chuck Lever | 8e02f6b | 2009-06-17 18:02:13 -0700 | [diff] [blame] | 200 | dprintk("NFS: failed to create MNT RPC client, status=%d\n", status); |
Chuck Lever | 013a8c1 | 2007-07-01 12:13:38 -0400 | [diff] [blame] | 201 | goto out; |
| 202 | |
| 203 | out_call_err: |
Chuck Lever | 8e02f6b | 2009-06-17 18:02:13 -0700 | [diff] [blame] | 204 | dprintk("NFS: MNT request failed, status=%d\n", status); |
Chuck Lever | 013a8c1 | 2007-07-01 12:13:38 -0400 | [diff] [blame] | 205 | goto out; |
| 206 | |
| 207 | out_mnt_err: |
Chuck Lever | 8e02f6b | 2009-06-17 18:02:13 -0700 | [diff] [blame] | 208 | dprintk("NFS: MNT server returned result %d\n", result.errno); |
| 209 | status = result.errno; |
Chuck Lever | 013a8c1 | 2007-07-01 12:13:38 -0400 | [diff] [blame] | 210 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 211 | } |
| 212 | |
Chuck Lever | 0b52412 | 2009-08-09 15:09:30 -0400 | [diff] [blame] | 213 | /** |
| 214 | * nfs_umount - Notify a server that we have unmounted this export |
| 215 | * @info: pointer to umount request arguments |
| 216 | * |
| 217 | * MOUNTPROC_UMNT is advisory, so we set a short timeout, and always |
| 218 | * use UDP. |
| 219 | */ |
| 220 | void nfs_umount(const struct nfs_mount_request *info) |
| 221 | { |
| 222 | static const struct rpc_timeout nfs_umnt_timeout = { |
| 223 | .to_initval = 1 * HZ, |
| 224 | .to_maxval = 3 * HZ, |
| 225 | .to_retries = 2, |
| 226 | }; |
| 227 | struct rpc_create_args args = { |
Pavel Emelyanov | c653ce3 | 2010-09-29 16:04:45 +0400 | [diff] [blame] | 228 | .net = &init_net, |
Chuck Lever | 0b52412 | 2009-08-09 15:09:30 -0400 | [diff] [blame] | 229 | .protocol = IPPROTO_UDP, |
| 230 | .address = info->sap, |
| 231 | .addrsize = info->salen, |
| 232 | .timeout = &nfs_umnt_timeout, |
| 233 | .servername = info->hostname, |
| 234 | .program = &mnt_program, |
| 235 | .version = info->version, |
| 236 | .authflavor = RPC_AUTH_UNIX, |
| 237 | .flags = RPC_CLNT_CREATE_NOPING, |
| 238 | }; |
Chuck Lever | 0b52412 | 2009-08-09 15:09:30 -0400 | [diff] [blame] | 239 | struct rpc_message msg = { |
| 240 | .rpc_argp = info->dirpath, |
Chuck Lever | 0b52412 | 2009-08-09 15:09:30 -0400 | [diff] [blame] | 241 | }; |
| 242 | struct rpc_clnt *clnt; |
| 243 | int status; |
| 244 | |
| 245 | if (info->noresvport) |
| 246 | args.flags |= RPC_CLNT_CREATE_NONPRIVPORT; |
| 247 | |
| 248 | clnt = rpc_create(&args); |
| 249 | if (unlikely(IS_ERR(clnt))) |
| 250 | goto out_clnt_err; |
| 251 | |
| 252 | dprintk("NFS: sending UMNT request for %s:%s\n", |
| 253 | (info->hostname ? info->hostname : "server"), info->dirpath); |
| 254 | |
| 255 | if (info->version == NFS_MNT3_VERSION) |
| 256 | msg.rpc_proc = &clnt->cl_procinfo[MOUNTPROC3_UMNT]; |
| 257 | else |
| 258 | msg.rpc_proc = &clnt->cl_procinfo[MOUNTPROC_UMNT]; |
| 259 | |
| 260 | status = rpc_call_sync(clnt, &msg, 0); |
| 261 | rpc_shutdown_client(clnt); |
| 262 | |
| 263 | if (unlikely(status < 0)) |
| 264 | goto out_call_err; |
| 265 | |
| 266 | return; |
| 267 | |
| 268 | out_clnt_err: |
| 269 | dprintk("NFS: failed to create UMNT RPC client, status=%ld\n", |
| 270 | PTR_ERR(clnt)); |
| 271 | return; |
| 272 | |
| 273 | out_call_err: |
| 274 | dprintk("NFS: UMNT request failed, status=%d\n", status); |
| 275 | } |
| 276 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | /* |
| 278 | * XDR encode/decode functions for MOUNT |
| 279 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | |
Chuck Lever | 98eb2b4 | 2010-12-14 14:58:40 +0000 | [diff] [blame] | 281 | static void encode_mntdirpath(struct xdr_stream *xdr, const char *pathname) |
Chuck Lever | 29a1bd6 | 2009-06-17 18:02:11 -0700 | [diff] [blame] | 282 | { |
| 283 | const u32 pathname_len = strlen(pathname); |
| 284 | __be32 *p; |
| 285 | |
Chuck Lever | 98eb2b4 | 2010-12-14 14:58:40 +0000 | [diff] [blame] | 286 | BUG_ON(pathname_len > MNTPATHLEN); |
| 287 | p = xdr_reserve_space(xdr, 4 + pathname_len); |
Chuck Lever | 29a1bd6 | 2009-06-17 18:02:11 -0700 | [diff] [blame] | 288 | xdr_encode_opaque(p, pathname, pathname_len); |
Chuck Lever | 29a1bd6 | 2009-06-17 18:02:11 -0700 | [diff] [blame] | 289 | } |
| 290 | |
| 291 | static int mnt_enc_dirpath(struct rpc_rqst *req, __be32 *p, |
| 292 | const char *dirpath) |
| 293 | { |
| 294 | struct xdr_stream xdr; |
| 295 | |
| 296 | xdr_init_encode(&xdr, &req->rq_snd_buf, p); |
Chuck Lever | 98eb2b4 | 2010-12-14 14:58:40 +0000 | [diff] [blame] | 297 | encode_mntdirpath(&xdr, dirpath); |
| 298 | return 0; |
Chuck Lever | 29a1bd6 | 2009-06-17 18:02:11 -0700 | [diff] [blame] | 299 | } |
| 300 | |
Chuck Lever | fb12529 | 2009-06-17 18:02:12 -0700 | [diff] [blame] | 301 | /* |
| 302 | * RFC 1094: "A non-zero status indicates some sort of error. In this |
| 303 | * case, the status is a UNIX error number." This can be problematic |
| 304 | * if the server and client use different errno values for the same |
| 305 | * error. |
| 306 | * |
| 307 | * However, the OpenGroup XNFS spec provides a simple mapping that is |
| 308 | * independent of local errno values on the server and the client. |
| 309 | */ |
| 310 | static int decode_status(struct xdr_stream *xdr, struct mountres *res) |
| 311 | { |
| 312 | unsigned int i; |
| 313 | u32 status; |
| 314 | __be32 *p; |
| 315 | |
Chuck Lever | 98eb2b4 | 2010-12-14 14:58:40 +0000 | [diff] [blame] | 316 | p = xdr_inline_decode(xdr, 4); |
Chuck Lever | fb12529 | 2009-06-17 18:02:12 -0700 | [diff] [blame] | 317 | if (unlikely(p == NULL)) |
| 318 | return -EIO; |
Chuck Lever | 98eb2b4 | 2010-12-14 14:58:40 +0000 | [diff] [blame] | 319 | status = be32_to_cpup(p); |
Chuck Lever | fb12529 | 2009-06-17 18:02:12 -0700 | [diff] [blame] | 320 | |
Roel Kluin | dd8ac1d | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 321 | for (i = 0; i < ARRAY_SIZE(mnt_errtbl); i++) { |
Chuck Lever | fb12529 | 2009-06-17 18:02:12 -0700 | [diff] [blame] | 322 | if (mnt_errtbl[i].status == status) { |
| 323 | res->errno = mnt_errtbl[i].errno; |
| 324 | return 0; |
| 325 | } |
| 326 | } |
| 327 | |
| 328 | dprintk("NFS: unrecognized MNT status code: %u\n", status); |
| 329 | res->errno = -EACCES; |
| 330 | return 0; |
| 331 | } |
| 332 | |
Chuck Lever | 4fdcd99 | 2009-06-17 18:02:12 -0700 | [diff] [blame] | 333 | static int decode_fhandle(struct xdr_stream *xdr, struct mountres *res) |
| 334 | { |
| 335 | struct nfs_fh *fh = res->fh; |
| 336 | __be32 *p; |
| 337 | |
| 338 | p = xdr_inline_decode(xdr, NFS2_FHSIZE); |
| 339 | if (unlikely(p == NULL)) |
| 340 | return -EIO; |
| 341 | |
| 342 | fh->size = NFS2_FHSIZE; |
| 343 | memcpy(fh->data, p, NFS2_FHSIZE); |
| 344 | return 0; |
| 345 | } |
| 346 | |
Chuck Lever | 8e02f6b | 2009-06-17 18:02:13 -0700 | [diff] [blame] | 347 | static int mnt_dec_mountres(struct rpc_rqst *req, __be32 *p, |
| 348 | struct mountres *res) |
| 349 | { |
| 350 | struct xdr_stream xdr; |
| 351 | int status; |
| 352 | |
| 353 | xdr_init_decode(&xdr, &req->rq_rcv_buf, p); |
| 354 | |
| 355 | status = decode_status(&xdr, res); |
| 356 | if (unlikely(status != 0 || res->errno != 0)) |
| 357 | return status; |
| 358 | return decode_fhandle(&xdr, res); |
| 359 | } |
| 360 | |
Chuck Lever | fb12529 | 2009-06-17 18:02:12 -0700 | [diff] [blame] | 361 | static int decode_fhs_status(struct xdr_stream *xdr, struct mountres *res) |
| 362 | { |
| 363 | unsigned int i; |
| 364 | u32 status; |
| 365 | __be32 *p; |
| 366 | |
Chuck Lever | 98eb2b4 | 2010-12-14 14:58:40 +0000 | [diff] [blame] | 367 | p = xdr_inline_decode(xdr, 4); |
Chuck Lever | fb12529 | 2009-06-17 18:02:12 -0700 | [diff] [blame] | 368 | if (unlikely(p == NULL)) |
| 369 | return -EIO; |
Chuck Lever | 98eb2b4 | 2010-12-14 14:58:40 +0000 | [diff] [blame] | 370 | status = be32_to_cpup(p); |
Chuck Lever | fb12529 | 2009-06-17 18:02:12 -0700 | [diff] [blame] | 371 | |
Roel Kluin | dd8ac1d | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 372 | for (i = 0; i < ARRAY_SIZE(mnt3_errtbl); i++) { |
Chuck Lever | fb12529 | 2009-06-17 18:02:12 -0700 | [diff] [blame] | 373 | if (mnt3_errtbl[i].status == status) { |
| 374 | res->errno = mnt3_errtbl[i].errno; |
| 375 | return 0; |
| 376 | } |
| 377 | } |
| 378 | |
| 379 | dprintk("NFS: unrecognized MNT3 status code: %u\n", status); |
| 380 | res->errno = -EACCES; |
| 381 | return 0; |
| 382 | } |
| 383 | |
Chuck Lever | 4fdcd99 | 2009-06-17 18:02:12 -0700 | [diff] [blame] | 384 | static int decode_fhandle3(struct xdr_stream *xdr, struct mountres *res) |
| 385 | { |
| 386 | struct nfs_fh *fh = res->fh; |
| 387 | u32 size; |
| 388 | __be32 *p; |
| 389 | |
Chuck Lever | 98eb2b4 | 2010-12-14 14:58:40 +0000 | [diff] [blame] | 390 | p = xdr_inline_decode(xdr, 4); |
Chuck Lever | 4fdcd99 | 2009-06-17 18:02:12 -0700 | [diff] [blame] | 391 | if (unlikely(p == NULL)) |
| 392 | return -EIO; |
| 393 | |
Chuck Lever | 98eb2b4 | 2010-12-14 14:58:40 +0000 | [diff] [blame] | 394 | size = be32_to_cpup(p); |
Chuck Lever | 4fdcd99 | 2009-06-17 18:02:12 -0700 | [diff] [blame] | 395 | if (size > NFS3_FHSIZE || size == 0) |
| 396 | return -EIO; |
| 397 | |
| 398 | p = xdr_inline_decode(xdr, size); |
| 399 | if (unlikely(p == NULL)) |
| 400 | return -EIO; |
| 401 | |
| 402 | fh->size = size; |
| 403 | memcpy(fh->data, p, size); |
| 404 | return 0; |
| 405 | } |
| 406 | |
Chuck Lever | a14017d | 2009-06-17 18:02:12 -0700 | [diff] [blame] | 407 | static int decode_auth_flavors(struct xdr_stream *xdr, struct mountres *res) |
| 408 | { |
| 409 | rpc_authflavor_t *flavors = res->auth_flavors; |
| 410 | unsigned int *count = res->auth_count; |
| 411 | u32 entries, i; |
| 412 | __be32 *p; |
| 413 | |
| 414 | if (*count == 0) |
| 415 | return 0; |
| 416 | |
Chuck Lever | 98eb2b4 | 2010-12-14 14:58:40 +0000 | [diff] [blame] | 417 | p = xdr_inline_decode(xdr, 4); |
Chuck Lever | a14017d | 2009-06-17 18:02:12 -0700 | [diff] [blame] | 418 | if (unlikely(p == NULL)) |
| 419 | return -EIO; |
Chuck Lever | 98eb2b4 | 2010-12-14 14:58:40 +0000 | [diff] [blame] | 420 | entries = be32_to_cpup(p); |
Chuck Lever | a14017d | 2009-06-17 18:02:12 -0700 | [diff] [blame] | 421 | dprintk("NFS: received %u auth flavors\n", entries); |
| 422 | if (entries > NFS_MAX_SECFLAVORS) |
| 423 | entries = NFS_MAX_SECFLAVORS; |
| 424 | |
Chuck Lever | 98eb2b4 | 2010-12-14 14:58:40 +0000 | [diff] [blame] | 425 | p = xdr_inline_decode(xdr, 4 * entries); |
Chuck Lever | a14017d | 2009-06-17 18:02:12 -0700 | [diff] [blame] | 426 | if (unlikely(p == NULL)) |
| 427 | return -EIO; |
| 428 | |
| 429 | if (entries > *count) |
| 430 | entries = *count; |
| 431 | |
| 432 | for (i = 0; i < entries; i++) { |
Chuck Lever | 98eb2b4 | 2010-12-14 14:58:40 +0000 | [diff] [blame] | 433 | flavors[i] = be32_to_cpup(p++); |
Chuck Lever | ed58b29 | 2010-09-17 10:54:37 -0400 | [diff] [blame] | 434 | dprintk("NFS: auth flavor[%u]: %d\n", i, flavors[i]); |
Chuck Lever | a14017d | 2009-06-17 18:02:12 -0700 | [diff] [blame] | 435 | } |
| 436 | *count = i; |
| 437 | |
| 438 | return 0; |
| 439 | } |
| 440 | |
Chuck Lever | 8e02f6b | 2009-06-17 18:02:13 -0700 | [diff] [blame] | 441 | static int mnt_dec_mountres3(struct rpc_rqst *req, __be32 *p, |
| 442 | struct mountres *res) |
| 443 | { |
| 444 | struct xdr_stream xdr; |
| 445 | int status; |
| 446 | |
| 447 | xdr_init_decode(&xdr, &req->rq_rcv_buf, p); |
| 448 | |
| 449 | status = decode_fhs_status(&xdr, res); |
| 450 | if (unlikely(status != 0 || res->errno != 0)) |
| 451 | return status; |
| 452 | status = decode_fhandle3(&xdr, res); |
| 453 | if (unlikely(status != 0)) { |
| 454 | res->errno = -EBADHANDLE; |
| 455 | return 0; |
| 456 | } |
| 457 | return decode_auth_flavors(&xdr, res); |
| 458 | } |
| 459 | |
Chuck Lever | 1920723 | 2007-07-01 12:13:33 -0400 | [diff] [blame] | 460 | static struct rpc_procinfo mnt_procedures[] = { |
Chuck Lever | 2ad7809 | 2009-06-17 18:02:11 -0700 | [diff] [blame] | 461 | [MOUNTPROC_MNT] = { |
| 462 | .p_proc = MOUNTPROC_MNT, |
Chuck Lever | 29a1bd6 | 2009-06-17 18:02:11 -0700 | [diff] [blame] | 463 | .p_encode = (kxdrproc_t)mnt_enc_dirpath, |
Chuck Lever | 8e02f6b | 2009-06-17 18:02:13 -0700 | [diff] [blame] | 464 | .p_decode = (kxdrproc_t)mnt_dec_mountres, |
Chuck Lever | 29a1bd6 | 2009-06-17 18:02:11 -0700 | [diff] [blame] | 465 | .p_arglen = MNT_enc_dirpath_sz, |
Chuck Lever | 8e02f6b | 2009-06-17 18:02:13 -0700 | [diff] [blame] | 466 | .p_replen = MNT_dec_mountres_sz, |
Chuck Lever | 2ad7809 | 2009-06-17 18:02:11 -0700 | [diff] [blame] | 467 | .p_statidx = MOUNTPROC_MNT, |
Chuck Lever | 1920723 | 2007-07-01 12:13:33 -0400 | [diff] [blame] | 468 | .p_name = "MOUNT", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | }, |
Chuck Lever | 0b52412 | 2009-08-09 15:09:30 -0400 | [diff] [blame] | 470 | [MOUNTPROC_UMNT] = { |
| 471 | .p_proc = MOUNTPROC_UMNT, |
| 472 | .p_encode = (kxdrproc_t)mnt_enc_dirpath, |
| 473 | .p_arglen = MNT_enc_dirpath_sz, |
| 474 | .p_statidx = MOUNTPROC_UMNT, |
| 475 | .p_name = "UMOUNT", |
| 476 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 477 | }; |
| 478 | |
| 479 | static struct rpc_procinfo mnt3_procedures[] = { |
Chuck Lever | 1920723 | 2007-07-01 12:13:33 -0400 | [diff] [blame] | 480 | [MOUNTPROC3_MNT] = { |
| 481 | .p_proc = MOUNTPROC3_MNT, |
Chuck Lever | 29a1bd6 | 2009-06-17 18:02:11 -0700 | [diff] [blame] | 482 | .p_encode = (kxdrproc_t)mnt_enc_dirpath, |
Chuck Lever | 8e02f6b | 2009-06-17 18:02:13 -0700 | [diff] [blame] | 483 | .p_decode = (kxdrproc_t)mnt_dec_mountres3, |
Chuck Lever | 29a1bd6 | 2009-06-17 18:02:11 -0700 | [diff] [blame] | 484 | .p_arglen = MNT_enc_dirpath_sz, |
Chuck Lever | 8e02f6b | 2009-06-17 18:02:13 -0700 | [diff] [blame] | 485 | .p_replen = MNT_dec_mountres3_sz, |
Chuck Lever | 1920723 | 2007-07-01 12:13:33 -0400 | [diff] [blame] | 486 | .p_statidx = MOUNTPROC3_MNT, |
| 487 | .p_name = "MOUNT", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | }, |
Chuck Lever | 0b52412 | 2009-08-09 15:09:30 -0400 | [diff] [blame] | 489 | [MOUNTPROC3_UMNT] = { |
| 490 | .p_proc = MOUNTPROC3_UMNT, |
| 491 | .p_encode = (kxdrproc_t)mnt_enc_dirpath, |
| 492 | .p_arglen = MNT_enc_dirpath_sz, |
| 493 | .p_statidx = MOUNTPROC3_UMNT, |
| 494 | .p_name = "UMOUNT", |
| 495 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 496 | }; |
| 497 | |
| 498 | |
Chuck Lever | 1920723 | 2007-07-01 12:13:33 -0400 | [diff] [blame] | 499 | static struct rpc_version mnt_version1 = { |
| 500 | .number = 1, |
Chuck Lever | 5b362ac | 2010-12-10 12:31:14 -0500 | [diff] [blame] | 501 | .nrprocs = ARRAY_SIZE(mnt_procedures), |
Chuck Lever | 1920723 | 2007-07-01 12:13:33 -0400 | [diff] [blame] | 502 | .procs = mnt_procedures, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | }; |
| 504 | |
Chuck Lever | 1920723 | 2007-07-01 12:13:33 -0400 | [diff] [blame] | 505 | static struct rpc_version mnt_version3 = { |
| 506 | .number = 3, |
Chuck Lever | 5b362ac | 2010-12-10 12:31:14 -0500 | [diff] [blame] | 507 | .nrprocs = ARRAY_SIZE(mnt3_procedures), |
Chuck Lever | 1920723 | 2007-07-01 12:13:33 -0400 | [diff] [blame] | 508 | .procs = mnt3_procedures, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 509 | }; |
| 510 | |
Chuck Lever | 1920723 | 2007-07-01 12:13:33 -0400 | [diff] [blame] | 511 | static struct rpc_version *mnt_version[] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 512 | NULL, |
| 513 | &mnt_version1, |
| 514 | NULL, |
| 515 | &mnt_version3, |
| 516 | }; |
| 517 | |
Chuck Lever | 1920723 | 2007-07-01 12:13:33 -0400 | [diff] [blame] | 518 | static struct rpc_stat mnt_stats; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | |
Chuck Lever | 1920723 | 2007-07-01 12:13:33 -0400 | [diff] [blame] | 520 | static struct rpc_program mnt_program = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 521 | .name = "mount", |
| 522 | .number = NFS_MNT_PROGRAM, |
Tobias Klauser | e8c96f8 | 2006-03-24 03:15:34 -0800 | [diff] [blame] | 523 | .nrvers = ARRAY_SIZE(mnt_version), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 524 | .version = mnt_version, |
| 525 | .stats = &mnt_stats, |
| 526 | }; |