Greg Kroah-Hartman | b244131 | 2017-11-01 15:07:57 +0100 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * XDR support for nfsd |
| 4 | * |
| 5 | * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de> |
| 6 | */ |
| 7 | |
Al Viro | 3dadecc | 2013-01-24 02:18:08 -0500 | [diff] [blame] | 8 | #include "vfs.h" |
Boaz Harrosh | 9a74af2 | 2009-12-03 20:30:56 +0200 | [diff] [blame] | 9 | #include "xdr.h" |
J. Bruce Fields | 2e8138a | 2007-11-15 17:05:43 -0500 | [diff] [blame] | 10 | #include "auth.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 11 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | /* |
| 13 | * Mapping of S_IF* types to NFS file types |
| 14 | */ |
Chuck Lever | 92b54a4 | 2020-10-23 15:28:59 -0400 | [diff] [blame] | 15 | static const u32 nfs_ftypes[] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 16 | NFNON, NFCHR, NFCHR, NFBAD, |
| 17 | NFDIR, NFBAD, NFBLK, NFBAD, |
| 18 | NFREG, NFBAD, NFLNK, NFBAD, |
| 19 | NFSOCK, NFBAD, NFLNK, NFBAD, |
| 20 | }; |
| 21 | |
| 22 | |
| 23 | /* |
Chuck Lever | ebcd8e8 | 2020-10-21 12:14:23 -0400 | [diff] [blame] | 24 | * Basic NFSv2 data types (RFC 1094 Section 2.3) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | */ |
Chuck Lever | ebcd8e8 | 2020-10-21 12:14:23 -0400 | [diff] [blame] | 26 | |
Chuck Lever | f8cba473 | 2020-11-18 14:38:47 -0500 | [diff] [blame] | 27 | /** |
| 28 | * svcxdr_encode_stat - Encode an NFSv2 status code |
| 29 | * @xdr: XDR stream |
| 30 | * @status: status value to encode |
| 31 | * |
| 32 | * Return values: |
| 33 | * %false: Send buffer space was exhausted |
| 34 | * %true: Success |
| 35 | */ |
| 36 | bool |
Chuck Lever | a887eae | 2020-10-23 11:08:02 -0400 | [diff] [blame] | 37 | svcxdr_encode_stat(struct xdr_stream *xdr, __be32 status) |
| 38 | { |
| 39 | __be32 *p; |
| 40 | |
| 41 | p = xdr_reserve_space(xdr, sizeof(status)); |
| 42 | if (!p) |
| 43 | return false; |
| 44 | *p = status; |
| 45 | |
| 46 | return true; |
| 47 | } |
| 48 | |
Chuck Lever | 635a45d | 2020-11-17 11:32:04 -0500 | [diff] [blame] | 49 | /** |
| 50 | * svcxdr_decode_fhandle - Decode an NFSv2 file handle |
| 51 | * @xdr: XDR stream positioned at an encoded NFSv2 FH |
| 52 | * @fhp: OUT: filled-in server file handle |
| 53 | * |
| 54 | * Return values: |
| 55 | * %false: The encoded file handle was not valid |
| 56 | * %true: @fhp has been initialized |
| 57 | */ |
| 58 | bool |
Chuck Lever | ebcd8e8 | 2020-10-21 12:14:23 -0400 | [diff] [blame] | 59 | svcxdr_decode_fhandle(struct xdr_stream *xdr, struct svc_fh *fhp) |
| 60 | { |
| 61 | __be32 *p; |
| 62 | |
| 63 | p = xdr_inline_decode(xdr, NFS_FHSIZE); |
| 64 | if (!p) |
| 65 | return false; |
| 66 | fh_init(fhp, NFS_FHSIZE); |
NeilBrown | d8b2607 | 2021-09-02 11:16:32 +1000 | [diff] [blame] | 67 | memcpy(&fhp->fh_handle.fh_raw, p, NFS_FHSIZE); |
Chuck Lever | ebcd8e8 | 2020-10-21 12:14:23 -0400 | [diff] [blame] | 68 | fhp->fh_handle.fh_size = NFS_FHSIZE; |
| 69 | |
| 70 | return true; |
| 71 | } |
| 72 | |
Chuck Lever | e3b4ef2 | 2020-10-23 16:44:16 -0400 | [diff] [blame] | 73 | static bool |
| 74 | svcxdr_encode_fhandle(struct xdr_stream *xdr, const struct svc_fh *fhp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | { |
Chuck Lever | e3b4ef2 | 2020-10-23 16:44:16 -0400 | [diff] [blame] | 76 | __be32 *p; |
| 77 | |
| 78 | p = xdr_reserve_space(xdr, NFS_FHSIZE); |
| 79 | if (!p) |
| 80 | return false; |
NeilBrown | d8b2607 | 2021-09-02 11:16:32 +1000 | [diff] [blame] | 81 | memcpy(p, &fhp->fh_handle.fh_raw, NFS_FHSIZE); |
Chuck Lever | e3b4ef2 | 2020-10-23 16:44:16 -0400 | [diff] [blame] | 82 | |
| 83 | return true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | } |
| 85 | |
Chuck Lever | 92b54a4 | 2020-10-23 15:28:59 -0400 | [diff] [blame] | 86 | static __be32 * |
| 87 | encode_timeval(__be32 *p, const struct timespec64 *time) |
| 88 | { |
| 89 | *p++ = cpu_to_be32((u32)time->tv_sec); |
| 90 | if (time->tv_nsec) |
| 91 | *p++ = cpu_to_be32(time->tv_nsec / NSEC_PER_USEC); |
| 92 | else |
| 93 | *p++ = xdr_zero; |
| 94 | return p; |
| 95 | } |
| 96 | |
Chuck Lever | 6d742c1 | 2020-10-19 14:33:24 -0400 | [diff] [blame] | 97 | static bool |
| 98 | svcxdr_decode_filename(struct xdr_stream *xdr, char **name, unsigned int *len) |
| 99 | { |
| 100 | u32 size, i; |
| 101 | __be32 *p; |
| 102 | char *c; |
| 103 | |
| 104 | if (xdr_stream_decode_u32(xdr, &size) < 0) |
| 105 | return false; |
| 106 | if (size == 0 || size > NFS_MAXNAMLEN) |
| 107 | return false; |
| 108 | p = xdr_inline_decode(xdr, size); |
| 109 | if (!p) |
| 110 | return false; |
| 111 | |
| 112 | *len = size; |
| 113 | *name = (char *)p; |
| 114 | for (i = 0, c = *name; i < size; i++, c++) |
| 115 | if (*c == '\0' || *c == '/') |
| 116 | return false; |
| 117 | |
| 118 | return true; |
| 119 | } |
| 120 | |
| 121 | static bool |
| 122 | svcxdr_decode_diropargs(struct xdr_stream *xdr, struct svc_fh *fhp, |
| 123 | char **name, unsigned int *len) |
| 124 | { |
| 125 | return svcxdr_decode_fhandle(xdr, fhp) && |
| 126 | svcxdr_decode_filename(xdr, name, len); |
| 127 | } |
| 128 | |
Chuck Lever | 2fdd6bd | 2020-10-21 12:39:06 -0400 | [diff] [blame] | 129 | static bool |
| 130 | svcxdr_decode_sattr(struct svc_rqst *rqstp, struct xdr_stream *xdr, |
| 131 | struct iattr *iap) |
| 132 | { |
| 133 | u32 tmp1, tmp2; |
| 134 | __be32 *p; |
| 135 | |
| 136 | p = xdr_inline_decode(xdr, XDR_UNIT * 8); |
| 137 | if (!p) |
| 138 | return false; |
| 139 | |
| 140 | iap->ia_valid = 0; |
| 141 | |
| 142 | /* |
| 143 | * Some Sun clients put 0xffff in the mode field when they |
| 144 | * mean 0xffffffff. |
| 145 | */ |
| 146 | tmp1 = be32_to_cpup(p++); |
| 147 | if (tmp1 != (u32)-1 && tmp1 != 0xffff) { |
| 148 | iap->ia_valid |= ATTR_MODE; |
| 149 | iap->ia_mode = tmp1; |
| 150 | } |
| 151 | |
| 152 | tmp1 = be32_to_cpup(p++); |
| 153 | if (tmp1 != (u32)-1) { |
| 154 | iap->ia_uid = make_kuid(nfsd_user_namespace(rqstp), tmp1); |
| 155 | if (uid_valid(iap->ia_uid)) |
| 156 | iap->ia_valid |= ATTR_UID; |
| 157 | } |
| 158 | |
| 159 | tmp1 = be32_to_cpup(p++); |
| 160 | if (tmp1 != (u32)-1) { |
| 161 | iap->ia_gid = make_kgid(nfsd_user_namespace(rqstp), tmp1); |
| 162 | if (gid_valid(iap->ia_gid)) |
| 163 | iap->ia_valid |= ATTR_GID; |
| 164 | } |
| 165 | |
| 166 | tmp1 = be32_to_cpup(p++); |
| 167 | if (tmp1 != (u32)-1) { |
| 168 | iap->ia_valid |= ATTR_SIZE; |
| 169 | iap->ia_size = tmp1; |
| 170 | } |
| 171 | |
| 172 | tmp1 = be32_to_cpup(p++); |
| 173 | tmp2 = be32_to_cpup(p++); |
| 174 | if (tmp1 != (u32)-1 && tmp2 != (u32)-1) { |
| 175 | iap->ia_valid |= ATTR_ATIME | ATTR_ATIME_SET; |
| 176 | iap->ia_atime.tv_sec = tmp1; |
| 177 | iap->ia_atime.tv_nsec = tmp2 * NSEC_PER_USEC; |
| 178 | } |
| 179 | |
| 180 | tmp1 = be32_to_cpup(p++); |
| 181 | tmp2 = be32_to_cpup(p++); |
| 182 | if (tmp1 != (u32)-1 && tmp2 != (u32)-1) { |
| 183 | iap->ia_valid |= ATTR_MTIME | ATTR_MTIME_SET; |
| 184 | iap->ia_mtime.tv_sec = tmp1; |
| 185 | iap->ia_mtime.tv_nsec = tmp2 * NSEC_PER_USEC; |
| 186 | /* |
| 187 | * Passing the invalid value useconds=1000000 for mtime |
| 188 | * is a Sun convention for "set both mtime and atime to |
| 189 | * current server time". It's needed to make permissions |
| 190 | * checks for the "touch" program across v2 mounts to |
| 191 | * Solaris and Irix boxes work correctly. See description of |
| 192 | * sattr in section 6.1 of "NFS Illustrated" by |
| 193 | * Brent Callaghan, Addison-Wesley, ISBN 0-201-32750-5 |
| 194 | */ |
| 195 | if (tmp2 == 1000000) |
| 196 | iap->ia_valid &= ~(ATTR_ATIME_SET|ATTR_MTIME_SET); |
| 197 | } |
| 198 | |
| 199 | return true; |
| 200 | } |
| 201 | |
Chuck Lever | f8cba473 | 2020-11-18 14:38:47 -0500 | [diff] [blame] | 202 | /** |
| 203 | * svcxdr_encode_fattr - Encode NFSv2 file attributes |
| 204 | * @rqstp: Context of a completed RPC transaction |
| 205 | * @xdr: XDR stream |
| 206 | * @fhp: File handle to encode |
| 207 | * @stat: Attributes to encode |
| 208 | * |
| 209 | * Return values: |
| 210 | * %false: Send buffer space was exhausted |
| 211 | * %true: Success |
| 212 | */ |
| 213 | bool |
Chuck Lever | 92b54a4 | 2020-10-23 15:28:59 -0400 | [diff] [blame] | 214 | svcxdr_encode_fattr(struct svc_rqst *rqstp, struct xdr_stream *xdr, |
| 215 | const struct svc_fh *fhp, const struct kstat *stat) |
| 216 | { |
| 217 | struct user_namespace *userns = nfsd_user_namespace(rqstp); |
| 218 | struct dentry *dentry = fhp->fh_dentry; |
| 219 | int type = stat->mode & S_IFMT; |
| 220 | struct timespec64 time; |
| 221 | __be32 *p; |
| 222 | u32 fsid; |
| 223 | |
| 224 | p = xdr_reserve_space(xdr, XDR_UNIT * 17); |
| 225 | if (!p) |
Chuck Lever | e3b4ef2 | 2020-10-23 16:44:16 -0400 | [diff] [blame] | 226 | return false; |
Chuck Lever | 92b54a4 | 2020-10-23 15:28:59 -0400 | [diff] [blame] | 227 | |
| 228 | *p++ = cpu_to_be32(nfs_ftypes[type >> 12]); |
| 229 | *p++ = cpu_to_be32((u32)stat->mode); |
| 230 | *p++ = cpu_to_be32((u32)stat->nlink); |
| 231 | *p++ = cpu_to_be32((u32)from_kuid_munged(userns, stat->uid)); |
| 232 | *p++ = cpu_to_be32((u32)from_kgid_munged(userns, stat->gid)); |
| 233 | |
| 234 | if (S_ISLNK(type) && stat->size > NFS_MAXPATHLEN) |
| 235 | *p++ = cpu_to_be32(NFS_MAXPATHLEN); |
| 236 | else |
| 237 | *p++ = cpu_to_be32((u32) stat->size); |
| 238 | *p++ = cpu_to_be32((u32) stat->blksize); |
| 239 | if (S_ISCHR(type) || S_ISBLK(type)) |
| 240 | *p++ = cpu_to_be32(new_encode_dev(stat->rdev)); |
| 241 | else |
| 242 | *p++ = cpu_to_be32(0xffffffff); |
| 243 | *p++ = cpu_to_be32((u32)stat->blocks); |
| 244 | |
| 245 | switch (fsid_source(fhp)) { |
| 246 | case FSIDSOURCE_FSID: |
| 247 | fsid = (u32)fhp->fh_export->ex_fsid; |
| 248 | break; |
| 249 | case FSIDSOURCE_UUID: |
| 250 | fsid = ((u32 *)fhp->fh_export->ex_uuid)[0]; |
| 251 | fsid ^= ((u32 *)fhp->fh_export->ex_uuid)[1]; |
| 252 | fsid ^= ((u32 *)fhp->fh_export->ex_uuid)[2]; |
| 253 | fsid ^= ((u32 *)fhp->fh_export->ex_uuid)[3]; |
| 254 | break; |
| 255 | default: |
| 256 | fsid = new_encode_dev(stat->dev); |
| 257 | break; |
| 258 | } |
| 259 | *p++ = cpu_to_be32(fsid); |
| 260 | |
| 261 | *p++ = cpu_to_be32((u32)stat->ino); |
| 262 | p = encode_timeval(p, &stat->atime); |
| 263 | time = stat->mtime; |
| 264 | lease_get_mtime(d_inode(dentry), &time); |
| 265 | p = encode_timeval(p, &time); |
| 266 | encode_timeval(p, &stat->ctime); |
| 267 | |
Chuck Lever | e3b4ef2 | 2020-10-23 16:44:16 -0400 | [diff] [blame] | 268 | return true; |
Chuck Lever | 92b54a4 | 2020-10-23 15:28:59 -0400 | [diff] [blame] | 269 | } |
| 270 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | /* |
| 272 | * XDR decode functions |
| 273 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 274 | |
Chuck Lever | c44b31c | 2021-10-12 11:57:28 -0400 | [diff] [blame] | 275 | bool |
Chuck Lever | 16c6636 | 2021-10-12 11:57:22 -0400 | [diff] [blame] | 276 | nfssvc_decode_fhandleargs(struct svc_rqst *rqstp, struct xdr_stream *xdr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | { |
Christoph Hellwig | 026fec7 | 2017-05-08 19:01:48 +0200 | [diff] [blame] | 278 | struct nfsd_fhandle *args = rqstp->rq_argp; |
| 279 | |
Chuck Lever | ebcd8e8 | 2020-10-21 12:14:23 -0400 | [diff] [blame] | 280 | return svcxdr_decode_fhandle(xdr, &args->fh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | } |
| 282 | |
Chuck Lever | c44b31c | 2021-10-12 11:57:28 -0400 | [diff] [blame] | 283 | bool |
Chuck Lever | 16c6636 | 2021-10-12 11:57:22 -0400 | [diff] [blame] | 284 | nfssvc_decode_sattrargs(struct svc_rqst *rqstp, struct xdr_stream *xdr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | { |
Christoph Hellwig | 026fec7 | 2017-05-08 19:01:48 +0200 | [diff] [blame] | 286 | struct nfsd_sattrargs *args = rqstp->rq_argp; |
| 287 | |
Chuck Lever | 2fdd6bd | 2020-10-21 12:39:06 -0400 | [diff] [blame] | 288 | return svcxdr_decode_fhandle(xdr, &args->fh) && |
| 289 | svcxdr_decode_sattr(rqstp, xdr, &args->attrs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | } |
| 291 | |
Chuck Lever | c44b31c | 2021-10-12 11:57:28 -0400 | [diff] [blame] | 292 | bool |
Chuck Lever | 16c6636 | 2021-10-12 11:57:22 -0400 | [diff] [blame] | 293 | nfssvc_decode_diropargs(struct svc_rqst *rqstp, struct xdr_stream *xdr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | { |
Christoph Hellwig | 026fec7 | 2017-05-08 19:01:48 +0200 | [diff] [blame] | 295 | struct nfsd_diropargs *args = rqstp->rq_argp; |
| 296 | |
Chuck Lever | 6d742c1 | 2020-10-19 14:33:24 -0400 | [diff] [blame] | 297 | return svcxdr_decode_diropargs(xdr, &args->fh, &args->name, &args->len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 298 | } |
| 299 | |
Chuck Lever | c44b31c | 2021-10-12 11:57:28 -0400 | [diff] [blame] | 300 | bool |
Chuck Lever | 16c6636 | 2021-10-12 11:57:22 -0400 | [diff] [blame] | 301 | nfssvc_decode_readargs(struct svc_rqst *rqstp, struct xdr_stream *xdr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 302 | { |
Christoph Hellwig | 026fec7 | 2017-05-08 19:01:48 +0200 | [diff] [blame] | 303 | struct nfsd_readargs *args = rqstp->rq_argp; |
Chuck Lever | 8c293ef | 2020-10-21 12:15:51 -0400 | [diff] [blame] | 304 | u32 totalcount; |
| 305 | |
| 306 | if (!svcxdr_decode_fhandle(xdr, &args->fh)) |
Chuck Lever | c44b31c | 2021-10-12 11:57:28 -0400 | [diff] [blame] | 307 | return false; |
Chuck Lever | 8c293ef | 2020-10-21 12:15:51 -0400 | [diff] [blame] | 308 | if (xdr_stream_decode_u32(xdr, &args->offset) < 0) |
Chuck Lever | c44b31c | 2021-10-12 11:57:28 -0400 | [diff] [blame] | 309 | return false; |
Chuck Lever | 8c293ef | 2020-10-21 12:15:51 -0400 | [diff] [blame] | 310 | if (xdr_stream_decode_u32(xdr, &args->count) < 0) |
Chuck Lever | c44b31c | 2021-10-12 11:57:28 -0400 | [diff] [blame] | 311 | return false; |
Chuck Lever | 8c293ef | 2020-10-21 12:15:51 -0400 | [diff] [blame] | 312 | /* totalcount is ignored */ |
| 313 | if (xdr_stream_decode_u32(xdr, &totalcount) < 0) |
Chuck Lever | c44b31c | 2021-10-12 11:57:28 -0400 | [diff] [blame] | 314 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | |
Chuck Lever | c44b31c | 2021-10-12 11:57:28 -0400 | [diff] [blame] | 316 | return true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 317 | } |
| 318 | |
Chuck Lever | c44b31c | 2021-10-12 11:57:28 -0400 | [diff] [blame] | 319 | bool |
Chuck Lever | 16c6636 | 2021-10-12 11:57:22 -0400 | [diff] [blame] | 320 | nfssvc_decode_writeargs(struct svc_rqst *rqstp, struct xdr_stream *xdr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 321 | { |
Christoph Hellwig | 026fec7 | 2017-05-08 19:01:48 +0200 | [diff] [blame] | 322 | struct nfsd_writeargs *args = rqstp->rq_argp; |
Chuck Lever | a51b5b7 | 2020-10-21 12:18:36 -0400 | [diff] [blame] | 323 | u32 beginoffset, totalcount; |
Peter Staubach | f34b9568 | 2007-05-09 02:34:48 -0700 | [diff] [blame] | 324 | |
Chuck Lever | a51b5b7 | 2020-10-21 12:18:36 -0400 | [diff] [blame] | 325 | if (!svcxdr_decode_fhandle(xdr, &args->fh)) |
Chuck Lever | c44b31c | 2021-10-12 11:57:28 -0400 | [diff] [blame] | 326 | return false; |
Chuck Lever | a51b5b7 | 2020-10-21 12:18:36 -0400 | [diff] [blame] | 327 | /* beginoffset is ignored */ |
| 328 | if (xdr_stream_decode_u32(xdr, &beginoffset) < 0) |
Chuck Lever | c44b31c | 2021-10-12 11:57:28 -0400 | [diff] [blame] | 329 | return false; |
Chuck Lever | a51b5b7 | 2020-10-21 12:18:36 -0400 | [diff] [blame] | 330 | if (xdr_stream_decode_u32(xdr, &args->offset) < 0) |
Chuck Lever | c44b31c | 2021-10-12 11:57:28 -0400 | [diff] [blame] | 331 | return false; |
Chuck Lever | a51b5b7 | 2020-10-21 12:18:36 -0400 | [diff] [blame] | 332 | /* totalcount is ignored */ |
| 333 | if (xdr_stream_decode_u32(xdr, &totalcount) < 0) |
Chuck Lever | c44b31c | 2021-10-12 11:57:28 -0400 | [diff] [blame] | 334 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 335 | |
Chuck Lever | a51b5b7 | 2020-10-21 12:18:36 -0400 | [diff] [blame] | 336 | /* opaque data */ |
| 337 | if (xdr_stream_decode_u32(xdr, &args->len) < 0) |
Chuck Lever | c44b31c | 2021-10-12 11:57:28 -0400 | [diff] [blame] | 338 | return false; |
Chuck Lever | a51b5b7 | 2020-10-21 12:18:36 -0400 | [diff] [blame] | 339 | if (args->len > NFSSVC_MAXBLKSIZE_V2) |
Chuck Lever | c44b31c | 2021-10-12 11:57:28 -0400 | [diff] [blame] | 340 | return false; |
Peter Staubach | f34b9568 | 2007-05-09 02:34:48 -0700 | [diff] [blame] | 341 | |
Chuck Lever | d4da5ba | 2022-09-12 17:23:07 -0400 | [diff] [blame] | 342 | return xdr_stream_subsegment(xdr, &args->payload, args->len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 343 | } |
| 344 | |
Chuck Lever | c44b31c | 2021-10-12 11:57:28 -0400 | [diff] [blame] | 345 | bool |
Chuck Lever | 16c6636 | 2021-10-12 11:57:22 -0400 | [diff] [blame] | 346 | nfssvc_decode_createargs(struct svc_rqst *rqstp, struct xdr_stream *xdr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | { |
Christoph Hellwig | 026fec7 | 2017-05-08 19:01:48 +0200 | [diff] [blame] | 348 | struct nfsd_createargs *args = rqstp->rq_argp; |
| 349 | |
Chuck Lever | 7dcf65b | 2020-10-21 12:43:58 -0400 | [diff] [blame] | 350 | return svcxdr_decode_diropargs(xdr, &args->fh, |
| 351 | &args->name, &args->len) && |
| 352 | svcxdr_decode_sattr(rqstp, xdr, &args->attrs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 353 | } |
| 354 | |
Chuck Lever | c44b31c | 2021-10-12 11:57:28 -0400 | [diff] [blame] | 355 | bool |
Chuck Lever | 16c6636 | 2021-10-12 11:57:22 -0400 | [diff] [blame] | 356 | nfssvc_decode_renameargs(struct svc_rqst *rqstp, struct xdr_stream *xdr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 357 | { |
Christoph Hellwig | 026fec7 | 2017-05-08 19:01:48 +0200 | [diff] [blame] | 358 | struct nfsd_renameargs *args = rqstp->rq_argp; |
| 359 | |
Chuck Lever | 62aa557 | 2020-10-21 12:35:41 -0400 | [diff] [blame] | 360 | return svcxdr_decode_diropargs(xdr, &args->ffh, |
| 361 | &args->fname, &args->flen) && |
| 362 | svcxdr_decode_diropargs(xdr, &args->tfh, |
| 363 | &args->tname, &args->tlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | } |
| 365 | |
Chuck Lever | c44b31c | 2021-10-12 11:57:28 -0400 | [diff] [blame] | 366 | bool |
Chuck Lever | 16c6636 | 2021-10-12 11:57:22 -0400 | [diff] [blame] | 367 | nfssvc_decode_linkargs(struct svc_rqst *rqstp, struct xdr_stream *xdr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 368 | { |
Christoph Hellwig | 026fec7 | 2017-05-08 19:01:48 +0200 | [diff] [blame] | 369 | struct nfsd_linkargs *args = rqstp->rq_argp; |
| 370 | |
Chuck Lever | 77edcdf | 2020-10-21 12:34:24 -0400 | [diff] [blame] | 371 | return svcxdr_decode_fhandle(xdr, &args->ffh) && |
| 372 | svcxdr_decode_diropargs(xdr, &args->tfh, |
| 373 | &args->tname, &args->tlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 374 | } |
| 375 | |
Chuck Lever | c44b31c | 2021-10-12 11:57:28 -0400 | [diff] [blame] | 376 | bool |
Chuck Lever | 16c6636 | 2021-10-12 11:57:22 -0400 | [diff] [blame] | 377 | nfssvc_decode_symlinkargs(struct svc_rqst *rqstp, struct xdr_stream *xdr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | { |
Christoph Hellwig | 026fec7 | 2017-05-08 19:01:48 +0200 | [diff] [blame] | 379 | struct nfsd_symlinkargs *args = rqstp->rq_argp; |
Chuck Lever | 09f75a53 | 2020-10-21 12:46:03 -0400 | [diff] [blame] | 380 | struct kvec *head = rqstp->rq_arg.head; |
Christoph Hellwig | 026fec7 | 2017-05-08 19:01:48 +0200 | [diff] [blame] | 381 | |
Chuck Lever | 09f75a53 | 2020-10-21 12:46:03 -0400 | [diff] [blame] | 382 | if (!svcxdr_decode_diropargs(xdr, &args->ffh, &args->fname, &args->flen)) |
Chuck Lever | c44b31c | 2021-10-12 11:57:28 -0400 | [diff] [blame] | 383 | return false; |
Chuck Lever | 09f75a53 | 2020-10-21 12:46:03 -0400 | [diff] [blame] | 384 | if (xdr_stream_decode_u32(xdr, &args->tlen) < 0) |
Chuck Lever | c44b31c | 2021-10-12 11:57:28 -0400 | [diff] [blame] | 385 | return false; |
Chuck Lever | 38a7031 | 2018-03-27 10:54:21 -0400 | [diff] [blame] | 386 | if (args->tlen == 0) |
Chuck Lever | c44b31c | 2021-10-12 11:57:28 -0400 | [diff] [blame] | 387 | return false; |
Chuck Lever | 38a7031 | 2018-03-27 10:54:21 -0400 | [diff] [blame] | 388 | |
Chuck Lever | 09f75a53 | 2020-10-21 12:46:03 -0400 | [diff] [blame] | 389 | args->first.iov_len = head->iov_len - xdr_stream_pos(xdr); |
| 390 | args->first.iov_base = xdr_inline_decode(xdr, args->tlen); |
| 391 | if (!args->first.iov_base) |
Chuck Lever | c44b31c | 2021-10-12 11:57:28 -0400 | [diff] [blame] | 392 | return false; |
Chuck Lever | 09f75a53 | 2020-10-21 12:46:03 -0400 | [diff] [blame] | 393 | return svcxdr_decode_sattr(rqstp, xdr, &args->attrs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | } |
| 395 | |
Chuck Lever | c44b31c | 2021-10-12 11:57:28 -0400 | [diff] [blame] | 396 | bool |
Chuck Lever | 16c6636 | 2021-10-12 11:57:22 -0400 | [diff] [blame] | 397 | nfssvc_decode_readdirargs(struct svc_rqst *rqstp, struct xdr_stream *xdr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 398 | { |
Christoph Hellwig | 026fec7 | 2017-05-08 19:01:48 +0200 | [diff] [blame] | 399 | struct nfsd_readdirargs *args = rqstp->rq_argp; |
| 400 | |
Chuck Lever | 8688361 | 2020-10-19 14:15:51 -0400 | [diff] [blame] | 401 | if (!svcxdr_decode_fhandle(xdr, &args->fh)) |
Chuck Lever | c44b31c | 2021-10-12 11:57:28 -0400 | [diff] [blame] | 402 | return false; |
Chuck Lever | 8688361 | 2020-10-19 14:15:51 -0400 | [diff] [blame] | 403 | if (xdr_stream_decode_u32(xdr, &args->cookie) < 0) |
Chuck Lever | c44b31c | 2021-10-12 11:57:28 -0400 | [diff] [blame] | 404 | return false; |
Chuck Lever | 8688361 | 2020-10-19 14:15:51 -0400 | [diff] [blame] | 405 | if (xdr_stream_decode_u32(xdr, &args->count) < 0) |
Chuck Lever | c44b31c | 2021-10-12 11:57:28 -0400 | [diff] [blame] | 406 | return false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | |
Chuck Lever | c44b31c | 2021-10-12 11:57:28 -0400 | [diff] [blame] | 408 | return true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | } |
| 410 | |
| 411 | /* |
| 412 | * XDR encode functions |
| 413 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 414 | |
Chuck Lever | 130e205 | 2021-10-13 10:41:13 -0400 | [diff] [blame] | 415 | bool |
Chuck Lever | fda4944 | 2021-10-13 10:41:06 -0400 | [diff] [blame] | 416 | nfssvc_encode_statres(struct svc_rqst *rqstp, struct xdr_stream *xdr) |
Chuck Lever | cc028a1 | 2020-10-02 15:52:44 -0400 | [diff] [blame] | 417 | { |
| 418 | struct nfsd_stat *resp = rqstp->rq_resp; |
| 419 | |
Chuck Lever | a887eae | 2020-10-23 11:08:02 -0400 | [diff] [blame] | 420 | return svcxdr_encode_stat(xdr, resp->status); |
Chuck Lever | cc028a1 | 2020-10-02 15:52:44 -0400 | [diff] [blame] | 421 | } |
| 422 | |
Chuck Lever | 130e205 | 2021-10-13 10:41:13 -0400 | [diff] [blame] | 423 | bool |
Chuck Lever | fda4944 | 2021-10-13 10:41:06 -0400 | [diff] [blame] | 424 | nfssvc_encode_attrstatres(struct svc_rqst *rqstp, struct xdr_stream *xdr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 425 | { |
Christoph Hellwig | 63f8de3 | 2017-05-08 19:42:02 +0200 | [diff] [blame] | 426 | struct nfsd_attrstat *resp = rqstp->rq_resp; |
| 427 | |
Chuck Lever | 92b54a4 | 2020-10-23 15:28:59 -0400 | [diff] [blame] | 428 | if (!svcxdr_encode_stat(xdr, resp->status)) |
Chuck Lever | 130e205 | 2021-10-13 10:41:13 -0400 | [diff] [blame] | 429 | return false; |
Chuck Lever | 92b54a4 | 2020-10-23 15:28:59 -0400 | [diff] [blame] | 430 | switch (resp->status) { |
| 431 | case nfs_ok: |
| 432 | if (!svcxdr_encode_fattr(rqstp, xdr, &resp->fh, &resp->stat)) |
Chuck Lever | 130e205 | 2021-10-13 10:41:13 -0400 | [diff] [blame] | 433 | return false; |
Chuck Lever | 92b54a4 | 2020-10-23 15:28:59 -0400 | [diff] [blame] | 434 | break; |
| 435 | } |
| 436 | |
Chuck Lever | 130e205 | 2021-10-13 10:41:13 -0400 | [diff] [blame] | 437 | return true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 438 | } |
| 439 | |
Chuck Lever | 130e205 | 2021-10-13 10:41:13 -0400 | [diff] [blame] | 440 | bool |
Chuck Lever | fda4944 | 2021-10-13 10:41:06 -0400 | [diff] [blame] | 441 | nfssvc_encode_diropres(struct svc_rqst *rqstp, struct xdr_stream *xdr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 442 | { |
Christoph Hellwig | 63f8de3 | 2017-05-08 19:42:02 +0200 | [diff] [blame] | 443 | struct nfsd_diropres *resp = rqstp->rq_resp; |
| 444 | |
Chuck Lever | e3b4ef2 | 2020-10-23 16:44:16 -0400 | [diff] [blame] | 445 | if (!svcxdr_encode_stat(xdr, resp->status)) |
Chuck Lever | 130e205 | 2021-10-13 10:41:13 -0400 | [diff] [blame] | 446 | return false; |
Chuck Lever | e3b4ef2 | 2020-10-23 16:44:16 -0400 | [diff] [blame] | 447 | switch (resp->status) { |
| 448 | case nfs_ok: |
| 449 | if (!svcxdr_encode_fhandle(xdr, &resp->fh)) |
Chuck Lever | 130e205 | 2021-10-13 10:41:13 -0400 | [diff] [blame] | 450 | return false; |
Chuck Lever | e3b4ef2 | 2020-10-23 16:44:16 -0400 | [diff] [blame] | 451 | if (!svcxdr_encode_fattr(rqstp, xdr, &resp->fh, &resp->stat)) |
Chuck Lever | 130e205 | 2021-10-13 10:41:13 -0400 | [diff] [blame] | 452 | return false; |
Chuck Lever | e3b4ef2 | 2020-10-23 16:44:16 -0400 | [diff] [blame] | 453 | break; |
| 454 | } |
| 455 | |
Chuck Lever | 130e205 | 2021-10-13 10:41:13 -0400 | [diff] [blame] | 456 | return true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | } |
| 458 | |
Chuck Lever | 130e205 | 2021-10-13 10:41:13 -0400 | [diff] [blame] | 459 | bool |
Chuck Lever | fda4944 | 2021-10-13 10:41:06 -0400 | [diff] [blame] | 460 | nfssvc_encode_readlinkres(struct svc_rqst *rqstp, struct xdr_stream *xdr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 461 | { |
Christoph Hellwig | 63f8de3 | 2017-05-08 19:42:02 +0200 | [diff] [blame] | 462 | struct nfsd_readlinkres *resp = rqstp->rq_resp; |
Chuck Lever | 76e5492 | 2020-11-05 10:24:19 -0500 | [diff] [blame] | 463 | struct kvec *head = rqstp->rq_res.head; |
Christoph Hellwig | 63f8de3 | 2017-05-08 19:42:02 +0200 | [diff] [blame] | 464 | |
Chuck Lever | d9014b0 | 2020-10-23 15:41:09 -0400 | [diff] [blame] | 465 | if (!svcxdr_encode_stat(xdr, resp->status)) |
Chuck Lever | 130e205 | 2021-10-13 10:41:13 -0400 | [diff] [blame] | 466 | return false; |
Chuck Lever | d9014b0 | 2020-10-23 15:41:09 -0400 | [diff] [blame] | 467 | switch (resp->status) { |
| 468 | case nfs_ok: |
| 469 | if (xdr_stream_encode_u32(xdr, resp->len) < 0) |
Chuck Lever | 130e205 | 2021-10-13 10:41:13 -0400 | [diff] [blame] | 470 | return false; |
Chuck Lever | d9014b0 | 2020-10-23 15:41:09 -0400 | [diff] [blame] | 471 | xdr_write_pages(xdr, &resp->page, 0, resp->len); |
| 472 | if (svc_encode_result_payload(rqstp, head->iov_len, resp->len) < 0) |
Chuck Lever | 130e205 | 2021-10-13 10:41:13 -0400 | [diff] [blame] | 473 | return false; |
Chuck Lever | d9014b0 | 2020-10-23 15:41:09 -0400 | [diff] [blame] | 474 | break; |
| 475 | } |
| 476 | |
Chuck Lever | 130e205 | 2021-10-13 10:41:13 -0400 | [diff] [blame] | 477 | return true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 478 | } |
| 479 | |
Chuck Lever | 130e205 | 2021-10-13 10:41:13 -0400 | [diff] [blame] | 480 | bool |
Chuck Lever | fda4944 | 2021-10-13 10:41:06 -0400 | [diff] [blame] | 481 | nfssvc_encode_readres(struct svc_rqst *rqstp, struct xdr_stream *xdr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | { |
Christoph Hellwig | 63f8de3 | 2017-05-08 19:42:02 +0200 | [diff] [blame] | 483 | struct nfsd_readres *resp = rqstp->rq_resp; |
Chuck Lever | 76e5492 | 2020-11-05 10:24:19 -0500 | [diff] [blame] | 484 | struct kvec *head = rqstp->rq_res.head; |
Christoph Hellwig | 63f8de3 | 2017-05-08 19:42:02 +0200 | [diff] [blame] | 485 | |
Chuck Lever | a6f8d9d | 2020-10-23 16:40:11 -0400 | [diff] [blame] | 486 | if (!svcxdr_encode_stat(xdr, resp->status)) |
Chuck Lever | 130e205 | 2021-10-13 10:41:13 -0400 | [diff] [blame] | 487 | return false; |
Chuck Lever | a6f8d9d | 2020-10-23 16:40:11 -0400 | [diff] [blame] | 488 | switch (resp->status) { |
| 489 | case nfs_ok: |
| 490 | if (!svcxdr_encode_fattr(rqstp, xdr, &resp->fh, &resp->stat)) |
Chuck Lever | 130e205 | 2021-10-13 10:41:13 -0400 | [diff] [blame] | 491 | return false; |
Chuck Lever | a6f8d9d | 2020-10-23 16:40:11 -0400 | [diff] [blame] | 492 | if (xdr_stream_encode_u32(xdr, resp->count) < 0) |
Chuck Lever | 130e205 | 2021-10-13 10:41:13 -0400 | [diff] [blame] | 493 | return false; |
Chuck Lever | a6f8d9d | 2020-10-23 16:40:11 -0400 | [diff] [blame] | 494 | xdr_write_pages(xdr, resp->pages, rqstp->rq_res.page_base, |
| 495 | resp->count); |
| 496 | if (svc_encode_result_payload(rqstp, head->iov_len, resp->count) < 0) |
Chuck Lever | 130e205 | 2021-10-13 10:41:13 -0400 | [diff] [blame] | 497 | return false; |
Chuck Lever | a6f8d9d | 2020-10-23 16:40:11 -0400 | [diff] [blame] | 498 | break; |
| 499 | } |
| 500 | |
Chuck Lever | 130e205 | 2021-10-13 10:41:13 -0400 | [diff] [blame] | 501 | return true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | } |
| 503 | |
Chuck Lever | 130e205 | 2021-10-13 10:41:13 -0400 | [diff] [blame] | 504 | bool |
Chuck Lever | fda4944 | 2021-10-13 10:41:06 -0400 | [diff] [blame] | 505 | nfssvc_encode_readdirres(struct svc_rqst *rqstp, struct xdr_stream *xdr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 506 | { |
Christoph Hellwig | 63f8de3 | 2017-05-08 19:42:02 +0200 | [diff] [blame] | 507 | struct nfsd_readdirres *resp = rqstp->rq_resp; |
Chuck Lever | f5dcccd | 2020-11-14 13:45:35 -0500 | [diff] [blame] | 508 | struct xdr_buf *dirlist = &resp->dirlist; |
Christoph Hellwig | 63f8de3 | 2017-05-08 19:42:02 +0200 | [diff] [blame] | 509 | |
Chuck Lever | 94c8f8c | 2020-10-23 16:49:01 -0400 | [diff] [blame] | 510 | if (!svcxdr_encode_stat(xdr, resp->status)) |
Chuck Lever | 130e205 | 2021-10-13 10:41:13 -0400 | [diff] [blame] | 511 | return false; |
Chuck Lever | 94c8f8c | 2020-10-23 16:49:01 -0400 | [diff] [blame] | 512 | switch (resp->status) { |
| 513 | case nfs_ok: |
Chuck Lever | f5dcccd | 2020-11-14 13:45:35 -0500 | [diff] [blame] | 514 | xdr_write_pages(xdr, dirlist->pages, 0, dirlist->len); |
Chuck Lever | 94c8f8c | 2020-10-23 16:49:01 -0400 | [diff] [blame] | 515 | /* no more entries */ |
| 516 | if (xdr_stream_encode_item_absent(xdr) < 0) |
Chuck Lever | 130e205 | 2021-10-13 10:41:13 -0400 | [diff] [blame] | 517 | return false; |
Chuck Lever | 94c8f8c | 2020-10-23 16:49:01 -0400 | [diff] [blame] | 518 | if (xdr_stream_encode_bool(xdr, resp->common.err == nfserr_eof) < 0) |
Chuck Lever | 130e205 | 2021-10-13 10:41:13 -0400 | [diff] [blame] | 519 | return false; |
Chuck Lever | 94c8f8c | 2020-10-23 16:49:01 -0400 | [diff] [blame] | 520 | break; |
| 521 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 522 | |
Chuck Lever | 130e205 | 2021-10-13 10:41:13 -0400 | [diff] [blame] | 523 | return true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 524 | } |
| 525 | |
Chuck Lever | 130e205 | 2021-10-13 10:41:13 -0400 | [diff] [blame] | 526 | bool |
Chuck Lever | fda4944 | 2021-10-13 10:41:06 -0400 | [diff] [blame] | 527 | nfssvc_encode_statfsres(struct svc_rqst *rqstp, struct xdr_stream *xdr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 528 | { |
Christoph Hellwig | 63f8de3 | 2017-05-08 19:42:02 +0200 | [diff] [blame] | 529 | struct nfsd_statfsres *resp = rqstp->rq_resp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 530 | struct kstatfs *stat = &resp->stats; |
Chuck Lever | fda4944 | 2021-10-13 10:41:06 -0400 | [diff] [blame] | 531 | __be32 *p; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 532 | |
Chuck Lever | bf15229 | 2020-10-23 19:01:38 -0400 | [diff] [blame] | 533 | if (!svcxdr_encode_stat(xdr, resp->status)) |
Chuck Lever | 130e205 | 2021-10-13 10:41:13 -0400 | [diff] [blame] | 534 | return false; |
Chuck Lever | bf15229 | 2020-10-23 19:01:38 -0400 | [diff] [blame] | 535 | switch (resp->status) { |
| 536 | case nfs_ok: |
| 537 | p = xdr_reserve_space(xdr, XDR_UNIT * 5); |
| 538 | if (!p) |
Chuck Lever | 130e205 | 2021-10-13 10:41:13 -0400 | [diff] [blame] | 539 | return false; |
Chuck Lever | bf15229 | 2020-10-23 19:01:38 -0400 | [diff] [blame] | 540 | *p++ = cpu_to_be32(NFSSVC_MAXBLKSIZE_V2); |
| 541 | *p++ = cpu_to_be32(stat->f_bsize); |
| 542 | *p++ = cpu_to_be32(stat->f_blocks); |
| 543 | *p++ = cpu_to_be32(stat->f_bfree); |
| 544 | *p = cpu_to_be32(stat->f_bavail); |
| 545 | break; |
| 546 | } |
Chuck Lever | f0af221 | 2020-10-01 18:59:49 -0400 | [diff] [blame] | 547 | |
Chuck Lever | 130e205 | 2021-10-13 10:41:13 -0400 | [diff] [blame] | 548 | return true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 549 | } |
| 550 | |
Chuck Lever | d5253200 | 2020-11-13 16:53:17 -0500 | [diff] [blame] | 551 | /** |
| 552 | * nfssvc_encode_nfscookie - Encode a directory offset cookie |
| 553 | * @resp: readdir result context |
| 554 | * @offset: offset cookie to encode |
| 555 | * |
Chuck Lever | f5dcccd | 2020-11-14 13:45:35 -0500 | [diff] [blame] | 556 | * The buffer space for the offset cookie has already been reserved |
| 557 | * by svcxdr_encode_entry_common(). |
Chuck Lever | d5253200 | 2020-11-13 16:53:17 -0500 | [diff] [blame] | 558 | */ |
| 559 | void nfssvc_encode_nfscookie(struct nfsd_readdirres *resp, u32 offset) |
| 560 | { |
Chuck Lever | f5dcccd | 2020-11-14 13:45:35 -0500 | [diff] [blame] | 561 | __be32 cookie = cpu_to_be32(offset); |
| 562 | |
| 563 | if (!resp->cookie_offset) |
Chuck Lever | d5253200 | 2020-11-13 16:53:17 -0500 | [diff] [blame] | 564 | return; |
| 565 | |
Chuck Lever | f5dcccd | 2020-11-14 13:45:35 -0500 | [diff] [blame] | 566 | write_bytes_to_xdr_buf(&resp->dirlist, resp->cookie_offset, &cookie, |
| 567 | sizeof(cookie)); |
| 568 | resp->cookie_offset = 0; |
| 569 | } |
| 570 | |
| 571 | static bool |
| 572 | svcxdr_encode_entry_common(struct nfsd_readdirres *resp, const char *name, |
| 573 | int namlen, loff_t offset, u64 ino) |
| 574 | { |
| 575 | struct xdr_buf *dirlist = &resp->dirlist; |
| 576 | struct xdr_stream *xdr = &resp->xdr; |
| 577 | |
| 578 | if (xdr_stream_encode_item_present(xdr) < 0) |
| 579 | return false; |
| 580 | /* fileid */ |
| 581 | if (xdr_stream_encode_u32(xdr, (u32)ino) < 0) |
| 582 | return false; |
| 583 | /* name */ |
| 584 | if (xdr_stream_encode_opaque(xdr, name, min(namlen, NFS2_MAXNAMLEN)) < 0) |
| 585 | return false; |
| 586 | /* cookie */ |
| 587 | resp->cookie_offset = dirlist->len; |
| 588 | if (xdr_stream_encode_u32(xdr, ~0U) < 0) |
| 589 | return false; |
| 590 | |
| 591 | return true; |
| 592 | } |
| 593 | |
| 594 | /** |
Chuck Lever | 8a2cf9f | 2020-11-15 14:30:13 -0500 | [diff] [blame] | 595 | * nfssvc_encode_entry - encode one NFSv2 READDIR entry |
Chuck Lever | f5dcccd | 2020-11-14 13:45:35 -0500 | [diff] [blame] | 596 | * @data: directory context |
| 597 | * @name: name of the object to be encoded |
| 598 | * @namlen: length of that name, in bytes |
| 599 | * @offset: the offset of the previous entry |
| 600 | * @ino: the fileid of this entry |
| 601 | * @d_type: unused |
| 602 | * |
| 603 | * Return values: |
| 604 | * %0: Entry was successfully encoded. |
| 605 | * %-EINVAL: An encoding problem occured, secondary status code in resp->common.err |
| 606 | * |
| 607 | * On exit, the following fields are updated: |
| 608 | * - resp->xdr |
| 609 | * - resp->common.err |
| 610 | * - resp->cookie_offset |
| 611 | */ |
Chuck Lever | 8a2cf9f | 2020-11-15 14:30:13 -0500 | [diff] [blame] | 612 | int nfssvc_encode_entry(void *data, const char *name, int namlen, |
| 613 | loff_t offset, u64 ino, unsigned int d_type) |
Chuck Lever | f5dcccd | 2020-11-14 13:45:35 -0500 | [diff] [blame] | 614 | { |
| 615 | struct readdir_cd *ccd = data; |
| 616 | struct nfsd_readdirres *resp = container_of(ccd, |
| 617 | struct nfsd_readdirres, |
| 618 | common); |
| 619 | unsigned int starting_length = resp->dirlist.len; |
| 620 | |
| 621 | /* The offset cookie for the previous entry */ |
| 622 | nfssvc_encode_nfscookie(resp, offset); |
| 623 | |
| 624 | if (!svcxdr_encode_entry_common(resp, name, namlen, offset, ino)) |
| 625 | goto out_toosmall; |
| 626 | |
| 627 | xdr_commit_encode(&resp->xdr); |
| 628 | resp->common.err = nfs_ok; |
| 629 | return 0; |
| 630 | |
| 631 | out_toosmall: |
| 632 | resp->cookie_offset = 0; |
| 633 | resp->common.err = nfserr_toosmall; |
| 634 | resp->dirlist.len = starting_length; |
| 635 | return -EINVAL; |
Chuck Lever | d5253200 | 2020-11-13 16:53:17 -0500 | [diff] [blame] | 636 | } |
| 637 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 638 | /* |
| 639 | * XDR release functions |
| 640 | */ |
Chuck Lever | 1841b9b | 2020-10-01 18:59:44 -0400 | [diff] [blame] | 641 | void nfssvc_release_attrstat(struct svc_rqst *rqstp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 642 | { |
Chuck Lever | 1841b9b | 2020-10-01 18:59:44 -0400 | [diff] [blame] | 643 | struct nfsd_attrstat *resp = rqstp->rq_resp; |
| 644 | |
| 645 | fh_put(&resp->fh); |
| 646 | } |
| 647 | |
| 648 | void nfssvc_release_diropres(struct svc_rqst *rqstp) |
| 649 | { |
| 650 | struct nfsd_diropres *resp = rqstp->rq_resp; |
| 651 | |
| 652 | fh_put(&resp->fh); |
| 653 | } |
| 654 | |
| 655 | void nfssvc_release_readres(struct svc_rqst *rqstp) |
| 656 | { |
| 657 | struct nfsd_readres *resp = rqstp->rq_resp; |
Christoph Hellwig | 8537488 | 2017-05-08 18:48:24 +0200 | [diff] [blame] | 658 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 659 | fh_put(&resp->fh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 660 | } |