Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | * XDR support for nfsd/protocol version 3. |
| 3 | * |
| 4 | * Copyright (C) 1995, 1996, 1997 Olaf Kirch <okir@monad.swb.de> |
| 5 | * |
| 6 | * 2003-08-09 Jamie Lokier: Use htonl() for nanoseconds, not htons()! |
| 7 | */ |
| 8 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | #include <linux/namei.h> |
Stanislav Kinsbursky | b9c0ef8 | 2012-12-06 14:23:19 +0300 | [diff] [blame] | 10 | #include <linux/sunrpc/svc_xprt.h> |
Boaz Harrosh | 9a74af2 | 2009-12-03 20:30:56 +0200 | [diff] [blame] | 11 | #include "xdr3.h" |
J. Bruce Fields | 2e8138a | 2007-11-15 17:05:43 -0500 | [diff] [blame] | 12 | #include "auth.h" |
Stanislav Kinsbursky | b9c0ef8 | 2012-12-06 14:23:19 +0300 | [diff] [blame] | 13 | #include "netns.h" |
Al Viro | 3dadecc | 2013-01-24 02:18:08 -0500 | [diff] [blame] | 14 | #include "vfs.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | |
| 16 | #define NFSDDBG_FACILITY NFSDDBG_XDR |
| 17 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | |
| 19 | /* |
| 20 | * Mapping of S_IF* types to NFS file types |
| 21 | */ |
| 22 | static u32 nfs3_ftypes[] = { |
| 23 | NF3NON, NF3FIFO, NF3CHR, NF3BAD, |
| 24 | NF3DIR, NF3BAD, NF3BLK, NF3BAD, |
| 25 | NF3REG, NF3BAD, NF3LNK, NF3BAD, |
| 26 | NF3SOCK, NF3BAD, NF3LNK, NF3BAD, |
| 27 | }; |
| 28 | |
| 29 | /* |
| 30 | * XDR functions for basic NFS types |
| 31 | */ |
Adrian Bunk | 3ee6f61 | 2006-12-06 20:40:23 -0800 | [diff] [blame] | 32 | static __be32 * |
Al Viro | 91f0716 | 2006-10-19 23:28:57 -0700 | [diff] [blame] | 33 | encode_time3(__be32 *p, struct timespec *time) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | { |
| 35 | *p++ = htonl((u32) time->tv_sec); *p++ = htonl(time->tv_nsec); |
| 36 | return p; |
| 37 | } |
| 38 | |
Adrian Bunk | 3ee6f61 | 2006-12-06 20:40:23 -0800 | [diff] [blame] | 39 | static __be32 * |
Al Viro | 91f0716 | 2006-10-19 23:28:57 -0700 | [diff] [blame] | 40 | decode_time3(__be32 *p, struct timespec *time) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | { |
| 42 | time->tv_sec = ntohl(*p++); |
| 43 | time->tv_nsec = ntohl(*p++); |
| 44 | return p; |
| 45 | } |
| 46 | |
Adrian Bunk | 3ee6f61 | 2006-12-06 20:40:23 -0800 | [diff] [blame] | 47 | static __be32 * |
Al Viro | 91f0716 | 2006-10-19 23:28:57 -0700 | [diff] [blame] | 48 | decode_fh(__be32 *p, struct svc_fh *fhp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | { |
| 50 | unsigned int size; |
| 51 | fh_init(fhp, NFS3_FHSIZE); |
| 52 | size = ntohl(*p++); |
| 53 | if (size > NFS3_FHSIZE) |
| 54 | return NULL; |
| 55 | |
| 56 | memcpy(&fhp->fh_handle.fh_base, p, size); |
| 57 | fhp->fh_handle.fh_size = size; |
| 58 | return p + XDR_QUADLEN(size); |
| 59 | } |
| 60 | |
Andreas Gruenbacher | a257cdd | 2005-06-22 17:16:26 +0000 | [diff] [blame] | 61 | /* Helper function for NFSv3 ACL code */ |
Al Viro | 91f0716 | 2006-10-19 23:28:57 -0700 | [diff] [blame] | 62 | __be32 *nfs3svc_decode_fh(__be32 *p, struct svc_fh *fhp) |
Andreas Gruenbacher | a257cdd | 2005-06-22 17:16:26 +0000 | [diff] [blame] | 63 | { |
| 64 | return decode_fh(p, fhp); |
| 65 | } |
| 66 | |
Adrian Bunk | 3ee6f61 | 2006-12-06 20:40:23 -0800 | [diff] [blame] | 67 | static __be32 * |
Al Viro | 91f0716 | 2006-10-19 23:28:57 -0700 | [diff] [blame] | 68 | encode_fh(__be32 *p, struct svc_fh *fhp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | { |
| 70 | unsigned int size = fhp->fh_handle.fh_size; |
| 71 | *p++ = htonl(size); |
| 72 | if (size) p[XDR_QUADLEN(size)-1]=0; |
| 73 | memcpy(p, &fhp->fh_handle.fh_base, size); |
| 74 | return p + XDR_QUADLEN(size); |
| 75 | } |
| 76 | |
| 77 | /* |
| 78 | * Decode a file name and make sure that the path contains |
| 79 | * no slashes or null bytes. |
| 80 | */ |
Adrian Bunk | 3ee6f61 | 2006-12-06 20:40:23 -0800 | [diff] [blame] | 81 | static __be32 * |
Chuck Lever | ee1a95b | 2007-11-01 16:56:58 -0400 | [diff] [blame] | 82 | decode_filename(__be32 *p, char **namp, unsigned int *lenp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | { |
| 84 | char *name; |
Chuck Lever | ee1a95b | 2007-11-01 16:56:58 -0400 | [diff] [blame] | 85 | unsigned int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | |
| 87 | if ((p = xdr_decode_string_inplace(p, namp, lenp, NFS3_MAXNAMLEN)) != NULL) { |
| 88 | for (i = 0, name = *namp; i < *lenp; i++, name++) { |
| 89 | if (*name == '\0' || *name == '/') |
| 90 | return NULL; |
| 91 | } |
| 92 | } |
| 93 | |
| 94 | return p; |
| 95 | } |
| 96 | |
Adrian Bunk | 3ee6f61 | 2006-12-06 20:40:23 -0800 | [diff] [blame] | 97 | static __be32 * |
Al Viro | 91f0716 | 2006-10-19 23:28:57 -0700 | [diff] [blame] | 98 | decode_sattr3(__be32 *p, struct iattr *iap) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | { |
| 100 | u32 tmp; |
| 101 | |
| 102 | iap->ia_valid = 0; |
| 103 | |
| 104 | if (*p++) { |
| 105 | iap->ia_valid |= ATTR_MODE; |
| 106 | iap->ia_mode = ntohl(*p++); |
| 107 | } |
| 108 | if (*p++) { |
Eric W. Biederman | 458878a | 2013-02-02 04:16:08 -0800 | [diff] [blame] | 109 | iap->ia_uid = make_kuid(&init_user_ns, ntohl(*p++)); |
| 110 | if (uid_valid(iap->ia_uid)) |
| 111 | iap->ia_valid |= ATTR_UID; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | } |
| 113 | if (*p++) { |
Eric W. Biederman | 458878a | 2013-02-02 04:16:08 -0800 | [diff] [blame] | 114 | iap->ia_gid = make_kgid(&init_user_ns, ntohl(*p++)); |
| 115 | if (gid_valid(iap->ia_gid)) |
| 116 | iap->ia_valid |= ATTR_GID; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | } |
| 118 | if (*p++) { |
| 119 | u64 newsize; |
| 120 | |
| 121 | iap->ia_valid |= ATTR_SIZE; |
| 122 | p = xdr_decode_hyper(p, &newsize); |
Kinglong Mee | 3c7aa15 | 2014-06-10 18:08:19 +0800 | [diff] [blame] | 123 | iap->ia_size = min_t(u64, newsize, NFS_OFFSET_MAX); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | } |
| 125 | if ((tmp = ntohl(*p++)) == 1) { /* set to server time */ |
| 126 | iap->ia_valid |= ATTR_ATIME; |
| 127 | } else if (tmp == 2) { /* set to client time */ |
| 128 | iap->ia_valid |= ATTR_ATIME | ATTR_ATIME_SET; |
| 129 | iap->ia_atime.tv_sec = ntohl(*p++); |
| 130 | iap->ia_atime.tv_nsec = ntohl(*p++); |
| 131 | } |
| 132 | if ((tmp = ntohl(*p++)) == 1) { /* set to server time */ |
| 133 | iap->ia_valid |= ATTR_MTIME; |
| 134 | } else if (tmp == 2) { /* set to client time */ |
| 135 | iap->ia_valid |= ATTR_MTIME | ATTR_MTIME_SET; |
| 136 | iap->ia_mtime.tv_sec = ntohl(*p++); |
| 137 | iap->ia_mtime.tv_nsec = ntohl(*p++); |
| 138 | } |
| 139 | return p; |
| 140 | } |
| 141 | |
NeilBrown | af6a4e2 | 2007-02-14 00:33:12 -0800 | [diff] [blame] | 142 | static __be32 *encode_fsid(__be32 *p, struct svc_fh *fhp) |
| 143 | { |
| 144 | u64 f; |
| 145 | switch(fsid_source(fhp)) { |
| 146 | default: |
| 147 | case FSIDSOURCE_DEV: |
| 148 | p = xdr_encode_hyper(p, (u64)huge_encode_dev |
Al Viro | fc64005 | 2016-04-10 01:33:30 -0400 | [diff] [blame] | 149 | (fhp->fh_dentry->d_sb->s_dev)); |
NeilBrown | af6a4e2 | 2007-02-14 00:33:12 -0800 | [diff] [blame] | 150 | break; |
| 151 | case FSIDSOURCE_FSID: |
| 152 | p = xdr_encode_hyper(p, (u64) fhp->fh_export->ex_fsid); |
| 153 | break; |
| 154 | case FSIDSOURCE_UUID: |
| 155 | f = ((u64*)fhp->fh_export->ex_uuid)[0]; |
| 156 | f ^= ((u64*)fhp->fh_export->ex_uuid)[1]; |
| 157 | p = xdr_encode_hyper(p, f); |
| 158 | break; |
| 159 | } |
| 160 | return p; |
| 161 | } |
| 162 | |
Adrian Bunk | 3ee6f61 | 2006-12-06 20:40:23 -0800 | [diff] [blame] | 163 | static __be32 * |
Al Viro | 91f0716 | 2006-10-19 23:28:57 -0700 | [diff] [blame] | 164 | encode_fattr3(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp, |
David Shaw | a334de2 | 2006-01-06 00:19:58 -0800 | [diff] [blame] | 165 | struct kstat *stat) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | { |
David Shaw | a334de2 | 2006-01-06 00:19:58 -0800 | [diff] [blame] | 167 | *p++ = htonl(nfs3_ftypes[(stat->mode & S_IFMT) >> 12]); |
Albert Fluegel | 6e14b46 | 2013-11-18 12:18:01 -0500 | [diff] [blame] | 168 | *p++ = htonl((u32) (stat->mode & S_IALLUGO)); |
David Shaw | a334de2 | 2006-01-06 00:19:58 -0800 | [diff] [blame] | 169 | *p++ = htonl((u32) stat->nlink); |
Eric W. Biederman | 458878a | 2013-02-02 04:16:08 -0800 | [diff] [blame] | 170 | *p++ = htonl((u32) from_kuid(&init_user_ns, stat->uid)); |
| 171 | *p++ = htonl((u32) from_kgid(&init_user_ns, stat->gid)); |
David Shaw | a334de2 | 2006-01-06 00:19:58 -0800 | [diff] [blame] | 172 | if (S_ISLNK(stat->mode) && stat->size > NFS3_MAXPATHLEN) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | p = xdr_encode_hyper(p, (u64) NFS3_MAXPATHLEN); |
| 174 | } else { |
David Shaw | a334de2 | 2006-01-06 00:19:58 -0800 | [diff] [blame] | 175 | p = xdr_encode_hyper(p, (u64) stat->size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | } |
David Shaw | a334de2 | 2006-01-06 00:19:58 -0800 | [diff] [blame] | 177 | p = xdr_encode_hyper(p, ((u64)stat->blocks) << 9); |
| 178 | *p++ = htonl((u32) MAJOR(stat->rdev)); |
| 179 | *p++ = htonl((u32) MINOR(stat->rdev)); |
NeilBrown | af6a4e2 | 2007-02-14 00:33:12 -0800 | [diff] [blame] | 180 | p = encode_fsid(p, fhp); |
Peter Staubach | 40ee5dc | 2007-08-16 12:10:07 -0400 | [diff] [blame] | 181 | p = xdr_encode_hyper(p, stat->ino); |
David Shaw | a334de2 | 2006-01-06 00:19:58 -0800 | [diff] [blame] | 182 | p = encode_time3(p, &stat->atime); |
Peter Staubach | 40ee5dc | 2007-08-16 12:10:07 -0400 | [diff] [blame] | 183 | p = encode_time3(p, &stat->mtime); |
David Shaw | a334de2 | 2006-01-06 00:19:58 -0800 | [diff] [blame] | 184 | p = encode_time3(p, &stat->ctime); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | |
| 186 | return p; |
| 187 | } |
| 188 | |
Adrian Bunk | 3ee6f61 | 2006-12-06 20:40:23 -0800 | [diff] [blame] | 189 | static __be32 * |
Al Viro | 91f0716 | 2006-10-19 23:28:57 -0700 | [diff] [blame] | 190 | encode_saved_post_attr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | /* Attributes to follow */ |
| 193 | *p++ = xdr_one; |
Peter Staubach | 40ee5dc | 2007-08-16 12:10:07 -0400 | [diff] [blame] | 194 | return encode_fattr3(rqstp, p, fhp, &fhp->fh_post_attr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | } |
| 196 | |
| 197 | /* |
| 198 | * Encode post-operation attributes. |
| 199 | * The inode may be NULL if the call failed because of a stale file |
| 200 | * handle. In this case, no attributes are returned. |
| 201 | */ |
Al Viro | 91f0716 | 2006-10-19 23:28:57 -0700 | [diff] [blame] | 202 | static __be32 * |
| 203 | encode_post_op_attr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 204 | { |
| 205 | struct dentry *dentry = fhp->fh_dentry; |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 206 | if (dentry && d_really_is_positive(dentry)) { |
Al Viro | 3dadecc | 2013-01-24 02:18:08 -0500 | [diff] [blame] | 207 | __be32 err; |
David Shaw | a334de2 | 2006-01-06 00:19:58 -0800 | [diff] [blame] | 208 | struct kstat stat; |
| 209 | |
Al Viro | 3dadecc | 2013-01-24 02:18:08 -0500 | [diff] [blame] | 210 | err = fh_getattr(fhp, &stat); |
David Shaw | a334de2 | 2006-01-06 00:19:58 -0800 | [diff] [blame] | 211 | if (!err) { |
| 212 | *p++ = xdr_one; /* attributes follow */ |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 213 | lease_get_mtime(d_inode(dentry), &stat.mtime); |
David Shaw | a334de2 | 2006-01-06 00:19:58 -0800 | [diff] [blame] | 214 | return encode_fattr3(rqstp, p, fhp, &stat); |
| 215 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 216 | } |
| 217 | *p++ = xdr_zero; |
| 218 | return p; |
| 219 | } |
| 220 | |
Andreas Gruenbacher | a257cdd | 2005-06-22 17:16:26 +0000 | [diff] [blame] | 221 | /* Helper for NFSv3 ACLs */ |
Al Viro | 91f0716 | 2006-10-19 23:28:57 -0700 | [diff] [blame] | 222 | __be32 * |
| 223 | nfs3svc_encode_post_op_attr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp) |
Andreas Gruenbacher | a257cdd | 2005-06-22 17:16:26 +0000 | [diff] [blame] | 224 | { |
| 225 | return encode_post_op_attr(rqstp, p, fhp); |
| 226 | } |
| 227 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | /* |
| 229 | * Enocde weak cache consistency data |
| 230 | */ |
Al Viro | 91f0716 | 2006-10-19 23:28:57 -0700 | [diff] [blame] | 231 | static __be32 * |
| 232 | encode_wcc_data(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | { |
| 234 | struct dentry *dentry = fhp->fh_dentry; |
| 235 | |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 236 | if (dentry && d_really_is_positive(dentry) && fhp->fh_post_saved) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | if (fhp->fh_pre_saved) { |
| 238 | *p++ = xdr_one; |
| 239 | p = xdr_encode_hyper(p, (u64) fhp->fh_pre_size); |
| 240 | p = encode_time3(p, &fhp->fh_pre_mtime); |
| 241 | p = encode_time3(p, &fhp->fh_pre_ctime); |
| 242 | } else { |
| 243 | *p++ = xdr_zero; |
| 244 | } |
| 245 | return encode_saved_post_attr(rqstp, p, fhp); |
| 246 | } |
| 247 | /* no pre- or post-attrs */ |
| 248 | *p++ = xdr_zero; |
| 249 | return encode_post_op_attr(rqstp, p, fhp); |
| 250 | } |
| 251 | |
Peter Staubach | 40ee5dc | 2007-08-16 12:10:07 -0400 | [diff] [blame] | 252 | /* |
| 253 | * Fill in the post_op attr for the wcc data |
| 254 | */ |
| 255 | void fill_post_wcc(struct svc_fh *fhp) |
| 256 | { |
Al Viro | 3dadecc | 2013-01-24 02:18:08 -0500 | [diff] [blame] | 257 | __be32 err; |
Peter Staubach | 40ee5dc | 2007-08-16 12:10:07 -0400 | [diff] [blame] | 258 | |
| 259 | if (fhp->fh_post_saved) |
| 260 | printk("nfsd: inode locked twice during operation.\n"); |
| 261 | |
Al Viro | 3dadecc | 2013-01-24 02:18:08 -0500 | [diff] [blame] | 262 | err = fh_getattr(fhp, &fhp->fh_post_attr); |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 263 | fhp->fh_post_change = d_inode(fhp->fh_dentry)->i_version; |
Neil Brown | c1ac3ff | 2010-12-02 11:14:30 +1100 | [diff] [blame] | 264 | if (err) { |
Jeff Layton | aaf91ec | 2015-09-17 08:28:39 -0400 | [diff] [blame] | 265 | fhp->fh_post_saved = false; |
Neil Brown | c1ac3ff | 2010-12-02 11:14:30 +1100 | [diff] [blame] | 266 | /* Grab the ctime anyway - set_change_info might use it */ |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 267 | fhp->fh_post_attr.ctime = d_inode(fhp->fh_dentry)->i_ctime; |
Neil Brown | c1ac3ff | 2010-12-02 11:14:30 +1100 | [diff] [blame] | 268 | } else |
Jeff Layton | aaf91ec | 2015-09-17 08:28:39 -0400 | [diff] [blame] | 269 | fhp->fh_post_saved = true; |
Peter Staubach | 40ee5dc | 2007-08-16 12:10:07 -0400 | [diff] [blame] | 270 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | |
| 272 | /* |
| 273 | * XDR decode functions |
| 274 | */ |
| 275 | int |
Al Viro | 91f0716 | 2006-10-19 23:28:57 -0700 | [diff] [blame] | 276 | nfs3svc_decode_fhandle(struct svc_rqst *rqstp, __be32 *p, struct nfsd_fhandle *args) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | { |
Benoit Taine | d40aa33 | 2014-05-22 16:32:30 +0200 | [diff] [blame] | 278 | p = decode_fh(p, &args->fh); |
| 279 | if (!p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | return 0; |
| 281 | return xdr_argsize_check(rqstp, p); |
| 282 | } |
| 283 | |
| 284 | int |
Al Viro | 91f0716 | 2006-10-19 23:28:57 -0700 | [diff] [blame] | 285 | nfs3svc_decode_sattrargs(struct svc_rqst *rqstp, __be32 *p, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 286 | struct nfsd3_sattrargs *args) |
| 287 | { |
Benoit Taine | d40aa33 | 2014-05-22 16:32:30 +0200 | [diff] [blame] | 288 | p = decode_fh(p, &args->fh); |
| 289 | if (!p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | return 0; |
NeilBrown | 072f62e | 2007-05-09 02:34:57 -0700 | [diff] [blame] | 291 | p = decode_sattr3(p, &args->attrs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | |
| 293 | if ((args->check_guard = ntohl(*p++)) != 0) { |
| 294 | struct timespec time; |
| 295 | p = decode_time3(p, &time); |
| 296 | args->guardtime = time.tv_sec; |
| 297 | } |
| 298 | |
| 299 | return xdr_argsize_check(rqstp, p); |
| 300 | } |
| 301 | |
| 302 | int |
Al Viro | 91f0716 | 2006-10-19 23:28:57 -0700 | [diff] [blame] | 303 | nfs3svc_decode_diropargs(struct svc_rqst *rqstp, __be32 *p, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | struct nfsd3_diropargs *args) |
| 305 | { |
| 306 | if (!(p = decode_fh(p, &args->fh)) |
| 307 | || !(p = decode_filename(p, &args->name, &args->len))) |
| 308 | return 0; |
| 309 | |
| 310 | return xdr_argsize_check(rqstp, p); |
| 311 | } |
| 312 | |
| 313 | int |
Al Viro | 91f0716 | 2006-10-19 23:28:57 -0700 | [diff] [blame] | 314 | nfs3svc_decode_accessargs(struct svc_rqst *rqstp, __be32 *p, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | struct nfsd3_accessargs *args) |
| 316 | { |
Benoit Taine | d40aa33 | 2014-05-22 16:32:30 +0200 | [diff] [blame] | 317 | p = decode_fh(p, &args->fh); |
| 318 | if (!p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 319 | return 0; |
| 320 | args->access = ntohl(*p++); |
| 321 | |
| 322 | return xdr_argsize_check(rqstp, p); |
| 323 | } |
| 324 | |
| 325 | int |
Al Viro | 91f0716 | 2006-10-19 23:28:57 -0700 | [diff] [blame] | 326 | nfs3svc_decode_readargs(struct svc_rqst *rqstp, __be32 *p, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 327 | struct nfsd3_readargs *args) |
| 328 | { |
| 329 | unsigned int len; |
J. Bruce Fields | afc5940 | 2012-12-10 18:01:37 -0500 | [diff] [blame] | 330 | int v; |
Greg Banks | 7adae48 | 2006-10-04 02:15:47 -0700 | [diff] [blame] | 331 | u32 max_blocksize = svc_max_payload(rqstp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | |
Benoit Taine | d40aa33 | 2014-05-22 16:32:30 +0200 | [diff] [blame] | 333 | p = decode_fh(p, &args->fh); |
| 334 | if (!p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 335 | return 0; |
NeilBrown | 072f62e | 2007-05-09 02:34:57 -0700 | [diff] [blame] | 336 | p = xdr_decode_hyper(p, &args->offset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 337 | |
Kinglong Mee | 3c7aa15 | 2014-06-10 18:08:19 +0800 | [diff] [blame] | 338 | args->count = ntohl(*p++); |
| 339 | len = min(args->count, max_blocksize); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 340 | |
| 341 | /* set up the kvec */ |
| 342 | v=0; |
| 343 | while (len > 0) { |
J. Bruce Fields | afc5940 | 2012-12-10 18:01:37 -0500 | [diff] [blame] | 344 | struct page *p = *(rqstp->rq_next_page++); |
| 345 | |
| 346 | rqstp->rq_vec[v].iov_base = page_address(p); |
Kinglong Mee | 3c7aa15 | 2014-06-10 18:08:19 +0800 | [diff] [blame] | 347 | rqstp->rq_vec[v].iov_len = min_t(unsigned int, len, PAGE_SIZE); |
NeilBrown | 3cc03b1 | 2006-10-04 02:15:47 -0700 | [diff] [blame] | 348 | len -= rqstp->rq_vec[v].iov_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | v++; |
| 350 | } |
| 351 | args->vlen = v; |
| 352 | return xdr_argsize_check(rqstp, p); |
| 353 | } |
| 354 | |
| 355 | int |
Al Viro | 91f0716 | 2006-10-19 23:28:57 -0700 | [diff] [blame] | 356 | nfs3svc_decode_writeargs(struct svc_rqst *rqstp, __be32 *p, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 357 | struct nfsd3_writeargs *args) |
| 358 | { |
Peter Staubach | f34b956 | 2007-05-09 02:34:48 -0700 | [diff] [blame] | 359 | unsigned int len, v, hdr, dlen; |
Greg Banks | 7adae48 | 2006-10-04 02:15:47 -0700 | [diff] [blame] | 360 | u32 max_blocksize = svc_max_payload(rqstp); |
J. Bruce Fields | 8ed0797 | 2017-04-25 16:21:34 -0400 | [diff] [blame^] | 361 | struct kvec *head = rqstp->rq_arg.head; |
| 362 | struct kvec *tail = rqstp->rq_arg.tail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 363 | |
Benoit Taine | d40aa33 | 2014-05-22 16:32:30 +0200 | [diff] [blame] | 364 | p = decode_fh(p, &args->fh); |
| 365 | if (!p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 366 | return 0; |
NeilBrown | 072f62e | 2007-05-09 02:34:57 -0700 | [diff] [blame] | 367 | p = xdr_decode_hyper(p, &args->offset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 368 | |
| 369 | args->count = ntohl(*p++); |
| 370 | args->stable = ntohl(*p++); |
| 371 | len = args->len = ntohl(*p++); |
Peter Staubach | f34b956 | 2007-05-09 02:34:48 -0700 | [diff] [blame] | 372 | /* |
| 373 | * The count must equal the amount of data passed. |
| 374 | */ |
| 375 | if (args->count != args->len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | return 0; |
| 377 | |
Peter Staubach | f34b956 | 2007-05-09 02:34:48 -0700 | [diff] [blame] | 378 | /* |
| 379 | * Check to make sure that we got the right number of |
| 380 | * bytes. |
Peter Staubach | f34b956 | 2007-05-09 02:34:48 -0700 | [diff] [blame] | 381 | */ |
J. Bruce Fields | 8ed0797 | 2017-04-25 16:21:34 -0400 | [diff] [blame^] | 382 | hdr = (void*)p - head->iov_base; |
| 383 | dlen = head->iov_len + rqstp->rq_arg.page_len + tail->iov_len - hdr; |
Peter Staubach | f34b956 | 2007-05-09 02:34:48 -0700 | [diff] [blame] | 384 | /* |
| 385 | * Round the length of the data which was specified up to |
| 386 | * the next multiple of XDR units and then compare that |
| 387 | * against the length which was actually received. |
NeilBrown | ba67a39 | 2008-01-11 17:06:52 -0500 | [diff] [blame] | 388 | * Note that when RPCSEC/GSS (for example) is used, the |
| 389 | * data buffer can be padded so dlen might be larger |
| 390 | * than required. It must never be smaller. |
Peter Staubach | f34b956 | 2007-05-09 02:34:48 -0700 | [diff] [blame] | 391 | */ |
NeilBrown | ba67a39 | 2008-01-11 17:06:52 -0500 | [diff] [blame] | 392 | if (dlen < XDR_QUADLEN(len)*4) |
Peter Staubach | f34b956 | 2007-05-09 02:34:48 -0700 | [diff] [blame] | 393 | return 0; |
| 394 | |
| 395 | if (args->count > max_blocksize) { |
| 396 | args->count = max_blocksize; |
| 397 | len = args->len = max_blocksize; |
| 398 | } |
NeilBrown | 3cc03b1 | 2006-10-04 02:15:47 -0700 | [diff] [blame] | 399 | rqstp->rq_vec[0].iov_base = (void*)p; |
J. Bruce Fields | 8ed0797 | 2017-04-25 16:21:34 -0400 | [diff] [blame^] | 400 | rqstp->rq_vec[0].iov_len = head->iov_len - hdr; |
Peter Staubach | f34b956 | 2007-05-09 02:34:48 -0700 | [diff] [blame] | 401 | v = 0; |
NeilBrown | 3cc03b1 | 2006-10-04 02:15:47 -0700 | [diff] [blame] | 402 | while (len > rqstp->rq_vec[v].iov_len) { |
| 403 | len -= rqstp->rq_vec[v].iov_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 404 | v++; |
NeilBrown | 3cc03b1 | 2006-10-04 02:15:47 -0700 | [diff] [blame] | 405 | rqstp->rq_vec[v].iov_base = page_address(rqstp->rq_pages[v]); |
| 406 | rqstp->rq_vec[v].iov_len = PAGE_SIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | } |
NeilBrown | 3cc03b1 | 2006-10-04 02:15:47 -0700 | [diff] [blame] | 408 | rqstp->rq_vec[v].iov_len = len; |
Peter Staubach | f34b956 | 2007-05-09 02:34:48 -0700 | [diff] [blame] | 409 | args->vlen = v + 1; |
| 410 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | } |
| 412 | |
| 413 | int |
Al Viro | 91f0716 | 2006-10-19 23:28:57 -0700 | [diff] [blame] | 414 | nfs3svc_decode_createargs(struct svc_rqst *rqstp, __be32 *p, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 415 | struct nfsd3_createargs *args) |
| 416 | { |
| 417 | if (!(p = decode_fh(p, &args->fh)) |
| 418 | || !(p = decode_filename(p, &args->name, &args->len))) |
| 419 | return 0; |
| 420 | |
| 421 | switch (args->createmode = ntohl(*p++)) { |
| 422 | case NFS3_CREATE_UNCHECKED: |
| 423 | case NFS3_CREATE_GUARDED: |
NeilBrown | 072f62e | 2007-05-09 02:34:57 -0700 | [diff] [blame] | 424 | p = decode_sattr3(p, &args->attrs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 425 | break; |
| 426 | case NFS3_CREATE_EXCLUSIVE: |
| 427 | args->verf = p; |
| 428 | p += 2; |
| 429 | break; |
| 430 | default: |
| 431 | return 0; |
| 432 | } |
| 433 | |
| 434 | return xdr_argsize_check(rqstp, p); |
| 435 | } |
| 436 | int |
Al Viro | 91f0716 | 2006-10-19 23:28:57 -0700 | [diff] [blame] | 437 | nfs3svc_decode_mkdirargs(struct svc_rqst *rqstp, __be32 *p, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 438 | struct nfsd3_createargs *args) |
| 439 | { |
NeilBrown | 072f62e | 2007-05-09 02:34:57 -0700 | [diff] [blame] | 440 | if (!(p = decode_fh(p, &args->fh)) || |
| 441 | !(p = decode_filename(p, &args->name, &args->len))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 442 | return 0; |
NeilBrown | 072f62e | 2007-05-09 02:34:57 -0700 | [diff] [blame] | 443 | p = decode_sattr3(p, &args->attrs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 444 | |
| 445 | return xdr_argsize_check(rqstp, p); |
| 446 | } |
| 447 | |
| 448 | int |
Al Viro | 91f0716 | 2006-10-19 23:28:57 -0700 | [diff] [blame] | 449 | nfs3svc_decode_symlinkargs(struct svc_rqst *rqstp, __be32 *p, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | struct nfsd3_symlinkargs *args) |
| 451 | { |
Chuck Lever | a628f66 | 2007-11-01 16:57:20 -0400 | [diff] [blame] | 452 | unsigned int len, avail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 453 | char *old, *new; |
| 454 | struct kvec *vec; |
| 455 | |
NeilBrown | 072f62e | 2007-05-09 02:34:57 -0700 | [diff] [blame] | 456 | if (!(p = decode_fh(p, &args->ffh)) || |
| 457 | !(p = decode_filename(p, &args->fname, &args->flen)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 458 | ) |
| 459 | return 0; |
NeilBrown | 072f62e | 2007-05-09 02:34:57 -0700 | [diff] [blame] | 460 | p = decode_sattr3(p, &args->attrs); |
| 461 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 462 | /* now decode the pathname, which might be larger than the first page. |
| 463 | * As we have to check for nul's anyway, we copy it into a new page |
| 464 | * This page appears in the rq_res.pages list, but as pages_len is always |
| 465 | * 0, it won't get in the way |
| 466 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 467 | len = ntohl(*p++); |
| 468 | if (len == 0 || len > NFS3_MAXPATHLEN || len >= PAGE_SIZE) |
| 469 | return 0; |
J. Bruce Fields | afc5940 | 2012-12-10 18:01:37 -0500 | [diff] [blame] | 470 | args->tname = new = page_address(*(rqstp->rq_next_page++)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 471 | args->tlen = len; |
| 472 | /* first copy and check from the first page */ |
| 473 | old = (char*)p; |
| 474 | vec = &rqstp->rq_arg.head[0]; |
| 475 | avail = vec->iov_len - (old - (char*)vec->iov_base); |
| 476 | while (len && avail && *old) { |
| 477 | *new++ = *old++; |
| 478 | len--; |
| 479 | avail--; |
| 480 | } |
| 481 | /* now copy next page if there is one */ |
| 482 | if (len && !avail && rqstp->rq_arg.page_len) { |
Kinglong Mee | 3c7aa15 | 2014-06-10 18:08:19 +0800 | [diff] [blame] | 483 | avail = min_t(unsigned int, rqstp->rq_arg.page_len, PAGE_SIZE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 484 | old = page_address(rqstp->rq_arg.pages[0]); |
| 485 | } |
| 486 | while (len && avail && *old) { |
| 487 | *new++ = *old++; |
| 488 | len--; |
| 489 | avail--; |
| 490 | } |
| 491 | *new = '\0'; |
| 492 | if (len) |
| 493 | return 0; |
| 494 | |
| 495 | return 1; |
| 496 | } |
| 497 | |
| 498 | int |
Al Viro | 91f0716 | 2006-10-19 23:28:57 -0700 | [diff] [blame] | 499 | nfs3svc_decode_mknodargs(struct svc_rqst *rqstp, __be32 *p, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 500 | struct nfsd3_mknodargs *args) |
| 501 | { |
| 502 | if (!(p = decode_fh(p, &args->fh)) |
| 503 | || !(p = decode_filename(p, &args->name, &args->len))) |
| 504 | return 0; |
| 505 | |
| 506 | args->ftype = ntohl(*p++); |
| 507 | |
| 508 | if (args->ftype == NF3BLK || args->ftype == NF3CHR |
NeilBrown | 072f62e | 2007-05-09 02:34:57 -0700 | [diff] [blame] | 509 | || args->ftype == NF3SOCK || args->ftype == NF3FIFO) |
| 510 | p = decode_sattr3(p, &args->attrs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 511 | |
| 512 | if (args->ftype == NF3BLK || args->ftype == NF3CHR) { |
| 513 | args->major = ntohl(*p++); |
| 514 | args->minor = ntohl(*p++); |
| 515 | } |
| 516 | |
| 517 | return xdr_argsize_check(rqstp, p); |
| 518 | } |
| 519 | |
| 520 | int |
Al Viro | 91f0716 | 2006-10-19 23:28:57 -0700 | [diff] [blame] | 521 | nfs3svc_decode_renameargs(struct svc_rqst *rqstp, __be32 *p, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 522 | struct nfsd3_renameargs *args) |
| 523 | { |
| 524 | if (!(p = decode_fh(p, &args->ffh)) |
| 525 | || !(p = decode_filename(p, &args->fname, &args->flen)) |
| 526 | || !(p = decode_fh(p, &args->tfh)) |
| 527 | || !(p = decode_filename(p, &args->tname, &args->tlen))) |
| 528 | return 0; |
| 529 | |
| 530 | return xdr_argsize_check(rqstp, p); |
| 531 | } |
| 532 | |
| 533 | int |
Al Viro | 91f0716 | 2006-10-19 23:28:57 -0700 | [diff] [blame] | 534 | nfs3svc_decode_readlinkargs(struct svc_rqst *rqstp, __be32 *p, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 535 | struct nfsd3_readlinkargs *args) |
| 536 | { |
Benoit Taine | d40aa33 | 2014-05-22 16:32:30 +0200 | [diff] [blame] | 537 | p = decode_fh(p, &args->fh); |
| 538 | if (!p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 539 | return 0; |
J. Bruce Fields | afc5940 | 2012-12-10 18:01:37 -0500 | [diff] [blame] | 540 | args->buffer = page_address(*(rqstp->rq_next_page++)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 541 | |
| 542 | return xdr_argsize_check(rqstp, p); |
| 543 | } |
| 544 | |
| 545 | int |
Al Viro | 91f0716 | 2006-10-19 23:28:57 -0700 | [diff] [blame] | 546 | nfs3svc_decode_linkargs(struct svc_rqst *rqstp, __be32 *p, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | struct nfsd3_linkargs *args) |
| 548 | { |
| 549 | if (!(p = decode_fh(p, &args->ffh)) |
| 550 | || !(p = decode_fh(p, &args->tfh)) |
| 551 | || !(p = decode_filename(p, &args->tname, &args->tlen))) |
| 552 | return 0; |
| 553 | |
| 554 | return xdr_argsize_check(rqstp, p); |
| 555 | } |
| 556 | |
| 557 | int |
Al Viro | 91f0716 | 2006-10-19 23:28:57 -0700 | [diff] [blame] | 558 | nfs3svc_decode_readdirargs(struct svc_rqst *rqstp, __be32 *p, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | struct nfsd3_readdirargs *args) |
| 560 | { |
Benoit Taine | d40aa33 | 2014-05-22 16:32:30 +0200 | [diff] [blame] | 561 | p = decode_fh(p, &args->fh); |
| 562 | if (!p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 563 | return 0; |
| 564 | p = xdr_decode_hyper(p, &args->cookie); |
| 565 | args->verf = p; p += 2; |
| 566 | args->dircount = ~0; |
| 567 | args->count = ntohl(*p++); |
Kinglong Mee | 3c7aa15 | 2014-06-10 18:08:19 +0800 | [diff] [blame] | 568 | args->count = min_t(u32, args->count, PAGE_SIZE); |
J. Bruce Fields | afc5940 | 2012-12-10 18:01:37 -0500 | [diff] [blame] | 569 | args->buffer = page_address(*(rqstp->rq_next_page++)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 570 | |
| 571 | return xdr_argsize_check(rqstp, p); |
| 572 | } |
| 573 | |
| 574 | int |
Al Viro | 91f0716 | 2006-10-19 23:28:57 -0700 | [diff] [blame] | 575 | nfs3svc_decode_readdirplusargs(struct svc_rqst *rqstp, __be32 *p, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 576 | struct nfsd3_readdirargs *args) |
| 577 | { |
J. Bruce Fields | afc5940 | 2012-12-10 18:01:37 -0500 | [diff] [blame] | 578 | int len; |
Greg Banks | 7adae48 | 2006-10-04 02:15:47 -0700 | [diff] [blame] | 579 | u32 max_blocksize = svc_max_payload(rqstp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 580 | |
Benoit Taine | d40aa33 | 2014-05-22 16:32:30 +0200 | [diff] [blame] | 581 | p = decode_fh(p, &args->fh); |
| 582 | if (!p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 583 | return 0; |
| 584 | p = xdr_decode_hyper(p, &args->cookie); |
| 585 | args->verf = p; p += 2; |
| 586 | args->dircount = ntohl(*p++); |
| 587 | args->count = ntohl(*p++); |
| 588 | |
Kinglong Mee | 3c7aa15 | 2014-06-10 18:08:19 +0800 | [diff] [blame] | 589 | len = args->count = min(args->count, max_blocksize); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 590 | while (len > 0) { |
J. Bruce Fields | afc5940 | 2012-12-10 18:01:37 -0500 | [diff] [blame] | 591 | struct page *p = *(rqstp->rq_next_page++); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 592 | if (!args->buffer) |
J. Bruce Fields | afc5940 | 2012-12-10 18:01:37 -0500 | [diff] [blame] | 593 | args->buffer = page_address(p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 594 | len -= PAGE_SIZE; |
| 595 | } |
| 596 | |
| 597 | return xdr_argsize_check(rqstp, p); |
| 598 | } |
| 599 | |
| 600 | int |
Al Viro | 91f0716 | 2006-10-19 23:28:57 -0700 | [diff] [blame] | 601 | nfs3svc_decode_commitargs(struct svc_rqst *rqstp, __be32 *p, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 602 | struct nfsd3_commitargs *args) |
| 603 | { |
Benoit Taine | d40aa33 | 2014-05-22 16:32:30 +0200 | [diff] [blame] | 604 | p = decode_fh(p, &args->fh); |
| 605 | if (!p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 606 | return 0; |
| 607 | p = xdr_decode_hyper(p, &args->offset); |
| 608 | args->count = ntohl(*p++); |
| 609 | |
| 610 | return xdr_argsize_check(rqstp, p); |
| 611 | } |
| 612 | |
| 613 | /* |
| 614 | * XDR encode functions |
| 615 | */ |
| 616 | /* |
| 617 | * There must be an encoding function for void results so svc_process |
| 618 | * will work properly. |
| 619 | */ |
| 620 | int |
Al Viro | 91f0716 | 2006-10-19 23:28:57 -0700 | [diff] [blame] | 621 | nfs3svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 622 | { |
| 623 | return xdr_ressize_check(rqstp, p); |
| 624 | } |
| 625 | |
| 626 | /* GETATTR */ |
| 627 | int |
Al Viro | 91f0716 | 2006-10-19 23:28:57 -0700 | [diff] [blame] | 628 | nfs3svc_encode_attrstat(struct svc_rqst *rqstp, __be32 *p, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 629 | struct nfsd3_attrstat *resp) |
| 630 | { |
Peter Staubach | 40ee5dc | 2007-08-16 12:10:07 -0400 | [diff] [blame] | 631 | if (resp->status == 0) { |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 632 | lease_get_mtime(d_inode(resp->fh.fh_dentry), |
Peter Staubach | 40ee5dc | 2007-08-16 12:10:07 -0400 | [diff] [blame] | 633 | &resp->stat.mtime); |
David Shaw | a334de2 | 2006-01-06 00:19:58 -0800 | [diff] [blame] | 634 | p = encode_fattr3(rqstp, p, &resp->fh, &resp->stat); |
Peter Staubach | 40ee5dc | 2007-08-16 12:10:07 -0400 | [diff] [blame] | 635 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 636 | return xdr_ressize_check(rqstp, p); |
| 637 | } |
| 638 | |
| 639 | /* SETATTR, REMOVE, RMDIR */ |
| 640 | int |
Al Viro | 91f0716 | 2006-10-19 23:28:57 -0700 | [diff] [blame] | 641 | nfs3svc_encode_wccstat(struct svc_rqst *rqstp, __be32 *p, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 642 | struct nfsd3_attrstat *resp) |
| 643 | { |
| 644 | p = encode_wcc_data(rqstp, p, &resp->fh); |
| 645 | return xdr_ressize_check(rqstp, p); |
| 646 | } |
| 647 | |
| 648 | /* LOOKUP */ |
| 649 | int |
Al Viro | 91f0716 | 2006-10-19 23:28:57 -0700 | [diff] [blame] | 650 | nfs3svc_encode_diropres(struct svc_rqst *rqstp, __be32 *p, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 651 | struct nfsd3_diropres *resp) |
| 652 | { |
| 653 | if (resp->status == 0) { |
| 654 | p = encode_fh(p, &resp->fh); |
| 655 | p = encode_post_op_attr(rqstp, p, &resp->fh); |
| 656 | } |
| 657 | p = encode_post_op_attr(rqstp, p, &resp->dirfh); |
| 658 | return xdr_ressize_check(rqstp, p); |
| 659 | } |
| 660 | |
| 661 | /* ACCESS */ |
| 662 | int |
Al Viro | 91f0716 | 2006-10-19 23:28:57 -0700 | [diff] [blame] | 663 | nfs3svc_encode_accessres(struct svc_rqst *rqstp, __be32 *p, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 664 | struct nfsd3_accessres *resp) |
| 665 | { |
| 666 | p = encode_post_op_attr(rqstp, p, &resp->fh); |
| 667 | if (resp->status == 0) |
| 668 | *p++ = htonl(resp->access); |
| 669 | return xdr_ressize_check(rqstp, p); |
| 670 | } |
| 671 | |
| 672 | /* READLINK */ |
| 673 | int |
Al Viro | 91f0716 | 2006-10-19 23:28:57 -0700 | [diff] [blame] | 674 | nfs3svc_encode_readlinkres(struct svc_rqst *rqstp, __be32 *p, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 675 | struct nfsd3_readlinkres *resp) |
| 676 | { |
| 677 | p = encode_post_op_attr(rqstp, p, &resp->fh); |
| 678 | if (resp->status == 0) { |
| 679 | *p++ = htonl(resp->len); |
| 680 | xdr_ressize_check(rqstp, p); |
| 681 | rqstp->rq_res.page_len = resp->len; |
| 682 | if (resp->len & 3) { |
| 683 | /* need to pad the tail */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 684 | rqstp->rq_res.tail[0].iov_base = p; |
| 685 | *p = 0; |
| 686 | rqstp->rq_res.tail[0].iov_len = 4 - (resp->len&3); |
| 687 | } |
| 688 | return 1; |
| 689 | } else |
| 690 | return xdr_ressize_check(rqstp, p); |
| 691 | } |
| 692 | |
| 693 | /* READ */ |
| 694 | int |
Al Viro | 91f0716 | 2006-10-19 23:28:57 -0700 | [diff] [blame] | 695 | nfs3svc_encode_readres(struct svc_rqst *rqstp, __be32 *p, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 696 | struct nfsd3_readres *resp) |
| 697 | { |
| 698 | p = encode_post_op_attr(rqstp, p, &resp->fh); |
| 699 | if (resp->status == 0) { |
| 700 | *p++ = htonl(resp->count); |
| 701 | *p++ = htonl(resp->eof); |
| 702 | *p++ = htonl(resp->count); /* xdr opaque count */ |
| 703 | xdr_ressize_check(rqstp, p); |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 704 | /* now update rqstp->rq_res to reflect data as well */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 705 | rqstp->rq_res.page_len = resp->count; |
| 706 | if (resp->count & 3) { |
| 707 | /* need to pad the tail */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 708 | rqstp->rq_res.tail[0].iov_base = p; |
| 709 | *p = 0; |
| 710 | rqstp->rq_res.tail[0].iov_len = 4 - (resp->count & 3); |
| 711 | } |
| 712 | return 1; |
| 713 | } else |
| 714 | return xdr_ressize_check(rqstp, p); |
| 715 | } |
| 716 | |
| 717 | /* WRITE */ |
| 718 | int |
Al Viro | 91f0716 | 2006-10-19 23:28:57 -0700 | [diff] [blame] | 719 | nfs3svc_encode_writeres(struct svc_rqst *rqstp, __be32 *p, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 720 | struct nfsd3_writeres *resp) |
| 721 | { |
Stanislav Kinsbursky | b9c0ef8 | 2012-12-06 14:23:19 +0300 | [diff] [blame] | 722 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
| 723 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 724 | p = encode_wcc_data(rqstp, p, &resp->fh); |
| 725 | if (resp->status == 0) { |
| 726 | *p++ = htonl(resp->count); |
| 727 | *p++ = htonl(resp->committed); |
Stanislav Kinsbursky | b9c0ef8 | 2012-12-06 14:23:19 +0300 | [diff] [blame] | 728 | *p++ = htonl(nn->nfssvc_boot.tv_sec); |
| 729 | *p++ = htonl(nn->nfssvc_boot.tv_usec); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 730 | } |
| 731 | return xdr_ressize_check(rqstp, p); |
| 732 | } |
| 733 | |
| 734 | /* CREATE, MKDIR, SYMLINK, MKNOD */ |
| 735 | int |
Al Viro | 91f0716 | 2006-10-19 23:28:57 -0700 | [diff] [blame] | 736 | nfs3svc_encode_createres(struct svc_rqst *rqstp, __be32 *p, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 737 | struct nfsd3_diropres *resp) |
| 738 | { |
| 739 | if (resp->status == 0) { |
| 740 | *p++ = xdr_one; |
| 741 | p = encode_fh(p, &resp->fh); |
| 742 | p = encode_post_op_attr(rqstp, p, &resp->fh); |
| 743 | } |
| 744 | p = encode_wcc_data(rqstp, p, &resp->dirfh); |
| 745 | return xdr_ressize_check(rqstp, p); |
| 746 | } |
| 747 | |
| 748 | /* RENAME */ |
| 749 | int |
Al Viro | 91f0716 | 2006-10-19 23:28:57 -0700 | [diff] [blame] | 750 | nfs3svc_encode_renameres(struct svc_rqst *rqstp, __be32 *p, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 751 | struct nfsd3_renameres *resp) |
| 752 | { |
| 753 | p = encode_wcc_data(rqstp, p, &resp->ffh); |
| 754 | p = encode_wcc_data(rqstp, p, &resp->tfh); |
| 755 | return xdr_ressize_check(rqstp, p); |
| 756 | } |
| 757 | |
| 758 | /* LINK */ |
| 759 | int |
Al Viro | 91f0716 | 2006-10-19 23:28:57 -0700 | [diff] [blame] | 760 | nfs3svc_encode_linkres(struct svc_rqst *rqstp, __be32 *p, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 761 | struct nfsd3_linkres *resp) |
| 762 | { |
| 763 | p = encode_post_op_attr(rqstp, p, &resp->fh); |
| 764 | p = encode_wcc_data(rqstp, p, &resp->tfh); |
| 765 | return xdr_ressize_check(rqstp, p); |
| 766 | } |
| 767 | |
| 768 | /* READDIR */ |
| 769 | int |
Al Viro | 91f0716 | 2006-10-19 23:28:57 -0700 | [diff] [blame] | 770 | nfs3svc_encode_readdirres(struct svc_rqst *rqstp, __be32 *p, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 771 | struct nfsd3_readdirres *resp) |
| 772 | { |
| 773 | p = encode_post_op_attr(rqstp, p, &resp->fh); |
| 774 | |
| 775 | if (resp->status == 0) { |
| 776 | /* stupid readdir cookie */ |
| 777 | memcpy(p, resp->verf, 8); p += 2; |
| 778 | xdr_ressize_check(rqstp, p); |
| 779 | if (rqstp->rq_res.head[0].iov_len + (2<<2) > PAGE_SIZE) |
| 780 | return 1; /*No room for trailer */ |
| 781 | rqstp->rq_res.page_len = (resp->count) << 2; |
| 782 | |
| 783 | /* add the 'tail' to the end of the 'head' page - page 0. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 784 | rqstp->rq_res.tail[0].iov_base = p; |
| 785 | *p++ = 0; /* no more entries */ |
| 786 | *p++ = htonl(resp->common.err == nfserr_eof); |
| 787 | rqstp->rq_res.tail[0].iov_len = 2<<2; |
| 788 | return 1; |
| 789 | } else |
| 790 | return xdr_ressize_check(rqstp, p); |
| 791 | } |
| 792 | |
Adrian Bunk | 3ee6f61 | 2006-12-06 20:40:23 -0800 | [diff] [blame] | 793 | static __be32 * |
Al Viro | 91f0716 | 2006-10-19 23:28:57 -0700 | [diff] [blame] | 794 | encode_entry_baggage(struct nfsd3_readdirres *cd, __be32 *p, const char *name, |
Peter Staubach | 40ee5dc | 2007-08-16 12:10:07 -0400 | [diff] [blame] | 795 | int namlen, u64 ino) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 796 | { |
| 797 | *p++ = xdr_one; /* mark entry present */ |
| 798 | p = xdr_encode_hyper(p, ino); /* file id */ |
| 799 | p = xdr_encode_array(p, name, namlen);/* name length & name */ |
| 800 | |
| 801 | cd->offset = p; /* remember pointer */ |
| 802 | p = xdr_encode_hyper(p, NFS_OFFSET_MAX);/* offset of next entry */ |
| 803 | |
| 804 | return p; |
| 805 | } |
| 806 | |
Al Viro | efe3965 | 2012-04-13 00:32:14 -0400 | [diff] [blame] | 807 | static __be32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 808 | compose_entry_fh(struct nfsd3_readdirres *cd, struct svc_fh *fhp, |
NeilBrown | 43b0e7e | 2015-05-03 09:16:53 +1000 | [diff] [blame] | 809 | const char *name, int namlen, u64 ino) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 810 | { |
| 811 | struct svc_export *exp; |
| 812 | struct dentry *dparent, *dchild; |
Al Viro | efe3965 | 2012-04-13 00:32:14 -0400 | [diff] [blame] | 813 | __be32 rv = nfserr_noent; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 814 | |
| 815 | dparent = cd->fh.fh_dentry; |
| 816 | exp = cd->fh.fh_export; |
| 817 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 818 | if (isdotent(name, namlen)) { |
| 819 | if (namlen == 2) { |
| 820 | dchild = dget_parent(dparent); |
Al Viro | efe3965 | 2012-04-13 00:32:14 -0400 | [diff] [blame] | 821 | /* filesystem root - cannot return filehandle for ".." */ |
| 822 | if (dchild == dparent) |
| 823 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 824 | } else |
| 825 | dchild = dget(dparent); |
| 826 | } else |
NeilBrown | bbddca8 | 2016-01-07 16:08:20 -0500 | [diff] [blame] | 827 | dchild = lookup_one_len_unlocked(name, dparent, namlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 828 | if (IS_ERR(dchild)) |
Al Viro | efe3965 | 2012-04-13 00:32:14 -0400 | [diff] [blame] | 829 | return rv; |
J. Bruce Fields | 8177e6d | 2009-09-04 14:13:09 -0400 | [diff] [blame] | 830 | if (d_mountpoint(dchild)) |
| 831 | goto out; |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 832 | if (d_really_is_negative(dchild)) |
J. Bruce Fields | 8177e6d | 2009-09-04 14:13:09 -0400 | [diff] [blame] | 833 | goto out; |
NeilBrown | 43b0e7e | 2015-05-03 09:16:53 +1000 | [diff] [blame] | 834 | if (dchild->d_inode->i_ino != ino) |
| 835 | goto out; |
Al Viro | efe3965 | 2012-04-13 00:32:14 -0400 | [diff] [blame] | 836 | rv = fh_compose(fhp, exp, dchild, &cd->fh); |
J. Bruce Fields | 8177e6d | 2009-09-04 14:13:09 -0400 | [diff] [blame] | 837 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 838 | dput(dchild); |
| 839 | return rv; |
| 840 | } |
| 841 | |
NeilBrown | 43b0e7e | 2015-05-03 09:16:53 +1000 | [diff] [blame] | 842 | static __be32 *encode_entryplus_baggage(struct nfsd3_readdirres *cd, __be32 *p, const char *name, int namlen, u64 ino) |
J. Bruce Fields | 8177e6d | 2009-09-04 14:13:09 -0400 | [diff] [blame] | 843 | { |
J. Bruce Fields | 068c34c | 2014-01-09 16:24:35 -0500 | [diff] [blame] | 844 | struct svc_fh *fh = &cd->scratch; |
Al Viro | efe3965 | 2012-04-13 00:32:14 -0400 | [diff] [blame] | 845 | __be32 err; |
J. Bruce Fields | 8177e6d | 2009-09-04 14:13:09 -0400 | [diff] [blame] | 846 | |
J. Bruce Fields | 068c34c | 2014-01-09 16:24:35 -0500 | [diff] [blame] | 847 | fh_init(fh, NFS3_FHSIZE); |
NeilBrown | 43b0e7e | 2015-05-03 09:16:53 +1000 | [diff] [blame] | 848 | err = compose_entry_fh(cd, fh, name, namlen, ino); |
J. Bruce Fields | 8177e6d | 2009-09-04 14:13:09 -0400 | [diff] [blame] | 849 | if (err) { |
| 850 | *p++ = 0; |
| 851 | *p++ = 0; |
J. Bruce Fields | aed100f | 2009-09-04 14:40:36 -0400 | [diff] [blame] | 852 | goto out; |
J. Bruce Fields | 8177e6d | 2009-09-04 14:13:09 -0400 | [diff] [blame] | 853 | } |
J. Bruce Fields | 068c34c | 2014-01-09 16:24:35 -0500 | [diff] [blame] | 854 | p = encode_post_op_attr(cd->rqstp, p, fh); |
J. Bruce Fields | 8177e6d | 2009-09-04 14:13:09 -0400 | [diff] [blame] | 855 | *p++ = xdr_one; /* yes, a file handle follows */ |
J. Bruce Fields | 068c34c | 2014-01-09 16:24:35 -0500 | [diff] [blame] | 856 | p = encode_fh(p, fh); |
J. Bruce Fields | aed100f | 2009-09-04 14:40:36 -0400 | [diff] [blame] | 857 | out: |
J. Bruce Fields | 068c34c | 2014-01-09 16:24:35 -0500 | [diff] [blame] | 858 | fh_put(fh); |
J. Bruce Fields | 8177e6d | 2009-09-04 14:13:09 -0400 | [diff] [blame] | 859 | return p; |
| 860 | } |
| 861 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 862 | /* |
| 863 | * Encode a directory entry. This one works for both normal readdir |
| 864 | * and readdirplus. |
| 865 | * The normal readdir reply requires 2 (fileid) + 1 (stringlen) |
| 866 | * + string + 2 (cookie) + 1 (next) words, i.e. 6 + strlen. |
| 867 | * |
| 868 | * The readdirplus baggage is 1+21 words for post_op_attr, plus the |
| 869 | * file handle. |
| 870 | */ |
| 871 | |
| 872 | #define NFS3_ENTRY_BAGGAGE (2 + 1 + 2 + 1) |
| 873 | #define NFS3_ENTRYPLUS_BAGGAGE (1 + 21 + 1 + (NFS3_FHSIZE >> 2)) |
| 874 | static int |
NeilBrown | 598b9a5 | 2007-03-26 21:32:08 -0800 | [diff] [blame] | 875 | encode_entry(struct readdir_cd *ccd, const char *name, int namlen, |
Peter Staubach | 40ee5dc | 2007-08-16 12:10:07 -0400 | [diff] [blame] | 876 | loff_t offset, u64 ino, unsigned int d_type, int plus) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 877 | { |
| 878 | struct nfsd3_readdirres *cd = container_of(ccd, struct nfsd3_readdirres, |
| 879 | common); |
Al Viro | 91f0716 | 2006-10-19 23:28:57 -0700 | [diff] [blame] | 880 | __be32 *p = cd->buffer; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 881 | caddr_t curr_page_addr = NULL; |
J. Bruce Fields | afc5940 | 2012-12-10 18:01:37 -0500 | [diff] [blame] | 882 | struct page ** page; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 883 | int slen; /* string (name) length */ |
| 884 | int elen; /* estimated entry length in words */ |
| 885 | int num_entry_words = 0; /* actual number of words */ |
| 886 | |
| 887 | if (cd->offset) { |
| 888 | u64 offset64 = offset; |
| 889 | |
| 890 | if (unlikely(cd->offset1)) { |
| 891 | /* we ended up with offset on a page boundary */ |
| 892 | *cd->offset = htonl(offset64 >> 32); |
| 893 | *cd->offset1 = htonl(offset64 & 0xffffffff); |
| 894 | cd->offset1 = NULL; |
| 895 | } else { |
NeilBrown | 598b9a5 | 2007-03-26 21:32:08 -0800 | [diff] [blame] | 896 | xdr_encode_hyper(cd->offset, offset64); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 897 | } |
| 898 | } |
| 899 | |
| 900 | /* |
| 901 | dprintk("encode_entry(%.*s @%ld%s)\n", |
| 902 | namlen, name, (long) offset, plus? " plus" : ""); |
| 903 | */ |
| 904 | |
| 905 | /* truncate filename if too long */ |
Kinglong Mee | 3c7aa15 | 2014-06-10 18:08:19 +0800 | [diff] [blame] | 906 | namlen = min(namlen, NFS3_MAXNAMLEN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 907 | |
| 908 | slen = XDR_QUADLEN(namlen); |
| 909 | elen = slen + NFS3_ENTRY_BAGGAGE |
| 910 | + (plus? NFS3_ENTRYPLUS_BAGGAGE : 0); |
| 911 | |
| 912 | if (cd->buflen < elen) { |
| 913 | cd->common.err = nfserr_toosmall; |
| 914 | return -EINVAL; |
| 915 | } |
| 916 | |
| 917 | /* determine which page in rq_respages[] we are currently filling */ |
J. Bruce Fields | afc5940 | 2012-12-10 18:01:37 -0500 | [diff] [blame] | 918 | for (page = cd->rqstp->rq_respages + 1; |
| 919 | page < cd->rqstp->rq_next_page; page++) { |
| 920 | curr_page_addr = page_address(*page); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 921 | |
| 922 | if (((caddr_t)cd->buffer >= curr_page_addr) && |
| 923 | ((caddr_t)cd->buffer < curr_page_addr + PAGE_SIZE)) |
| 924 | break; |
| 925 | } |
| 926 | |
| 927 | if ((caddr_t)(cd->buffer + elen) < (curr_page_addr + PAGE_SIZE)) { |
| 928 | /* encode entry in current page */ |
| 929 | |
| 930 | p = encode_entry_baggage(cd, p, name, namlen, ino); |
| 931 | |
J. Bruce Fields | 8177e6d | 2009-09-04 14:13:09 -0400 | [diff] [blame] | 932 | if (plus) |
NeilBrown | 43b0e7e | 2015-05-03 09:16:53 +1000 | [diff] [blame] | 933 | p = encode_entryplus_baggage(cd, p, name, namlen, ino); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 934 | num_entry_words = p - cd->buffer; |
J. Bruce Fields | afc5940 | 2012-12-10 18:01:37 -0500 | [diff] [blame] | 935 | } else if (*(page+1) != NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 936 | /* temporarily encode entry into next page, then move back to |
| 937 | * current and next page in rq_respages[] */ |
Al Viro | 91f0716 | 2006-10-19 23:28:57 -0700 | [diff] [blame] | 938 | __be32 *p1, *tmp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 939 | int len1, len2; |
| 940 | |
| 941 | /* grab next page for temporary storage of entry */ |
J. Bruce Fields | afc5940 | 2012-12-10 18:01:37 -0500 | [diff] [blame] | 942 | p1 = tmp = page_address(*(page+1)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 943 | |
| 944 | p1 = encode_entry_baggage(cd, p1, name, namlen, ino); |
| 945 | |
J. Bruce Fields | 8177e6d | 2009-09-04 14:13:09 -0400 | [diff] [blame] | 946 | if (plus) |
NeilBrown | 43b0e7e | 2015-05-03 09:16:53 +1000 | [diff] [blame] | 947 | p1 = encode_entryplus_baggage(cd, p1, name, namlen, ino); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 948 | |
| 949 | /* determine entry word length and lengths to go in pages */ |
| 950 | num_entry_words = p1 - tmp; |
| 951 | len1 = curr_page_addr + PAGE_SIZE - (caddr_t)cd->buffer; |
| 952 | if ((num_entry_words << 2) < len1) { |
| 953 | /* the actual number of words in the entry is less |
| 954 | * than elen and can still fit in the current page |
| 955 | */ |
| 956 | memmove(p, tmp, num_entry_words << 2); |
| 957 | p += num_entry_words; |
| 958 | |
| 959 | /* update offset */ |
| 960 | cd->offset = cd->buffer + (cd->offset - tmp); |
| 961 | } else { |
| 962 | unsigned int offset_r = (cd->offset - tmp) << 2; |
| 963 | |
| 964 | /* update pointer to offset location. |
| 965 | * This is a 64bit quantity, so we need to |
| 966 | * deal with 3 cases: |
| 967 | * - entirely in first page |
| 968 | * - entirely in second page |
| 969 | * - 4 bytes in each page |
| 970 | */ |
| 971 | if (offset_r + 8 <= len1) { |
| 972 | cd->offset = p + (cd->offset - tmp); |
| 973 | } else if (offset_r >= len1) { |
| 974 | cd->offset -= len1 >> 2; |
| 975 | } else { |
| 976 | /* sitting on the fence */ |
| 977 | BUG_ON(offset_r != len1 - 4); |
| 978 | cd->offset = p + (cd->offset - tmp); |
| 979 | cd->offset1 = tmp; |
| 980 | } |
| 981 | |
| 982 | len2 = (num_entry_words << 2) - len1; |
| 983 | |
| 984 | /* move from temp page to current and next pages */ |
| 985 | memmove(p, tmp, len1); |
| 986 | memmove(tmp, (caddr_t)tmp+len1, len2); |
| 987 | |
| 988 | p = tmp + (len2 >> 2); |
| 989 | } |
| 990 | } |
| 991 | else { |
| 992 | cd->common.err = nfserr_toosmall; |
| 993 | return -EINVAL; |
| 994 | } |
| 995 | |
| 996 | cd->buflen -= num_entry_words; |
| 997 | cd->buffer = p; |
| 998 | cd->common.err = nfs_ok; |
| 999 | return 0; |
| 1000 | |
| 1001 | } |
| 1002 | |
| 1003 | int |
NeilBrown | a0ad13e | 2007-01-26 00:57:10 -0800 | [diff] [blame] | 1004 | nfs3svc_encode_entry(void *cd, const char *name, |
| 1005 | int namlen, loff_t offset, u64 ino, unsigned int d_type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1006 | { |
| 1007 | return encode_entry(cd, name, namlen, offset, ino, d_type, 0); |
| 1008 | } |
| 1009 | |
| 1010 | int |
NeilBrown | a0ad13e | 2007-01-26 00:57:10 -0800 | [diff] [blame] | 1011 | nfs3svc_encode_entry_plus(void *cd, const char *name, |
| 1012 | int namlen, loff_t offset, u64 ino, |
| 1013 | unsigned int d_type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1014 | { |
| 1015 | return encode_entry(cd, name, namlen, offset, ino, d_type, 1); |
| 1016 | } |
| 1017 | |
| 1018 | /* FSSTAT */ |
| 1019 | int |
Al Viro | 91f0716 | 2006-10-19 23:28:57 -0700 | [diff] [blame] | 1020 | nfs3svc_encode_fsstatres(struct svc_rqst *rqstp, __be32 *p, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1021 | struct nfsd3_fsstatres *resp) |
| 1022 | { |
| 1023 | struct kstatfs *s = &resp->stats; |
| 1024 | u64 bs = s->f_bsize; |
| 1025 | |
| 1026 | *p++ = xdr_zero; /* no post_op_attr */ |
| 1027 | |
| 1028 | if (resp->status == 0) { |
| 1029 | p = xdr_encode_hyper(p, bs * s->f_blocks); /* total bytes */ |
| 1030 | p = xdr_encode_hyper(p, bs * s->f_bfree); /* free bytes */ |
| 1031 | p = xdr_encode_hyper(p, bs * s->f_bavail); /* user available bytes */ |
| 1032 | p = xdr_encode_hyper(p, s->f_files); /* total inodes */ |
| 1033 | p = xdr_encode_hyper(p, s->f_ffree); /* free inodes */ |
| 1034 | p = xdr_encode_hyper(p, s->f_ffree); /* user available inodes */ |
| 1035 | *p++ = htonl(resp->invarsec); /* mean unchanged time */ |
| 1036 | } |
| 1037 | return xdr_ressize_check(rqstp, p); |
| 1038 | } |
| 1039 | |
| 1040 | /* FSINFO */ |
| 1041 | int |
Al Viro | 91f0716 | 2006-10-19 23:28:57 -0700 | [diff] [blame] | 1042 | nfs3svc_encode_fsinfores(struct svc_rqst *rqstp, __be32 *p, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1043 | struct nfsd3_fsinfores *resp) |
| 1044 | { |
| 1045 | *p++ = xdr_zero; /* no post_op_attr */ |
| 1046 | |
| 1047 | if (resp->status == 0) { |
| 1048 | *p++ = htonl(resp->f_rtmax); |
| 1049 | *p++ = htonl(resp->f_rtpref); |
| 1050 | *p++ = htonl(resp->f_rtmult); |
| 1051 | *p++ = htonl(resp->f_wtmax); |
| 1052 | *p++ = htonl(resp->f_wtpref); |
| 1053 | *p++ = htonl(resp->f_wtmult); |
| 1054 | *p++ = htonl(resp->f_dtpref); |
| 1055 | p = xdr_encode_hyper(p, resp->f_maxfilesize); |
| 1056 | *p++ = xdr_one; |
| 1057 | *p++ = xdr_zero; |
| 1058 | *p++ = htonl(resp->f_properties); |
| 1059 | } |
| 1060 | |
| 1061 | return xdr_ressize_check(rqstp, p); |
| 1062 | } |
| 1063 | |
| 1064 | /* PATHCONF */ |
| 1065 | int |
Al Viro | 91f0716 | 2006-10-19 23:28:57 -0700 | [diff] [blame] | 1066 | nfs3svc_encode_pathconfres(struct svc_rqst *rqstp, __be32 *p, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1067 | struct nfsd3_pathconfres *resp) |
| 1068 | { |
| 1069 | *p++ = xdr_zero; /* no post_op_attr */ |
| 1070 | |
| 1071 | if (resp->status == 0) { |
| 1072 | *p++ = htonl(resp->p_link_max); |
| 1073 | *p++ = htonl(resp->p_name_max); |
| 1074 | *p++ = htonl(resp->p_no_trunc); |
| 1075 | *p++ = htonl(resp->p_chown_restricted); |
| 1076 | *p++ = htonl(resp->p_case_insensitive); |
| 1077 | *p++ = htonl(resp->p_case_preserving); |
| 1078 | } |
| 1079 | |
| 1080 | return xdr_ressize_check(rqstp, p); |
| 1081 | } |
| 1082 | |
| 1083 | /* COMMIT */ |
| 1084 | int |
Al Viro | 91f0716 | 2006-10-19 23:28:57 -0700 | [diff] [blame] | 1085 | nfs3svc_encode_commitres(struct svc_rqst *rqstp, __be32 *p, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1086 | struct nfsd3_commitres *resp) |
| 1087 | { |
Stanislav Kinsbursky | b9c0ef8 | 2012-12-06 14:23:19 +0300 | [diff] [blame] | 1088 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
| 1089 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1090 | p = encode_wcc_data(rqstp, p, &resp->fh); |
| 1091 | /* Write verifier */ |
| 1092 | if (resp->status == 0) { |
Stanislav Kinsbursky | b9c0ef8 | 2012-12-06 14:23:19 +0300 | [diff] [blame] | 1093 | *p++ = htonl(nn->nfssvc_boot.tv_sec); |
| 1094 | *p++ = htonl(nn->nfssvc_boot.tv_usec); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1095 | } |
| 1096 | return xdr_ressize_check(rqstp, p); |
| 1097 | } |
| 1098 | |
| 1099 | /* |
| 1100 | * XDR release functions |
| 1101 | */ |
| 1102 | int |
Al Viro | 91f0716 | 2006-10-19 23:28:57 -0700 | [diff] [blame] | 1103 | nfs3svc_release_fhandle(struct svc_rqst *rqstp, __be32 *p, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1104 | struct nfsd3_attrstat *resp) |
| 1105 | { |
| 1106 | fh_put(&resp->fh); |
| 1107 | return 1; |
| 1108 | } |
| 1109 | |
| 1110 | int |
Al Viro | 91f0716 | 2006-10-19 23:28:57 -0700 | [diff] [blame] | 1111 | nfs3svc_release_fhandle2(struct svc_rqst *rqstp, __be32 *p, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1112 | struct nfsd3_fhandle_pair *resp) |
| 1113 | { |
| 1114 | fh_put(&resp->fh1); |
| 1115 | fh_put(&resp->fh2); |
| 1116 | return 1; |
| 1117 | } |