Andreas Gruenbacher | a257cdd | 2005-06-22 17:16:26 +0000 | [diff] [blame] | 1 | /* |
Uwe Zeisberger | f30c226 | 2006-10-03 23:01:26 +0200 | [diff] [blame] | 2 | * linux/fs/nfsd/nfs2acl.c |
Andreas Gruenbacher | a257cdd | 2005-06-22 17:16:26 +0000 | [diff] [blame] | 3 | * |
| 4 | * Process version 2 NFSACL requests. |
| 5 | * |
| 6 | * Copyright (C) 2002-2003 Andreas Gruenbacher <agruen@suse.de> |
| 7 | */ |
| 8 | |
| 9 | #include <linux/sunrpc/svc.h> |
| 10 | #include <linux/nfs.h> |
| 11 | #include <linux/nfsd/nfsd.h> |
| 12 | #include <linux/nfsd/cache.h> |
| 13 | #include <linux/nfsd/xdr.h> |
| 14 | #include <linux/nfsd/xdr3.h> |
| 15 | #include <linux/posix_acl.h> |
| 16 | #include <linux/nfsacl.h> |
J. Bruce Fields | 0a3adad | 2009-11-04 18:12:35 -0500 | [diff] [blame^] | 17 | #include "vfs.h" |
Andreas Gruenbacher | a257cdd | 2005-06-22 17:16:26 +0000 | [diff] [blame] | 18 | |
| 19 | #define NFSDDBG_FACILITY NFSDDBG_PROC |
| 20 | #define RETURN_STATUS(st) { resp->status = (st); return (st); } |
| 21 | |
| 22 | /* |
| 23 | * NULL call. |
| 24 | */ |
Al Viro | 7111c66 | 2006-10-19 23:28:45 -0700 | [diff] [blame] | 25 | static __be32 |
Andreas Gruenbacher | a257cdd | 2005-06-22 17:16:26 +0000 | [diff] [blame] | 26 | nfsacld_proc_null(struct svc_rqst *rqstp, void *argp, void *resp) |
| 27 | { |
| 28 | return nfs_ok; |
| 29 | } |
| 30 | |
| 31 | /* |
| 32 | * Get the Access and/or Default ACL of a file. |
| 33 | */ |
Al Viro | 7111c66 | 2006-10-19 23:28:45 -0700 | [diff] [blame] | 34 | static __be32 nfsacld_proc_getacl(struct svc_rqst * rqstp, |
Andreas Gruenbacher | a257cdd | 2005-06-22 17:16:26 +0000 | [diff] [blame] | 35 | struct nfsd3_getaclargs *argp, struct nfsd3_getaclres *resp) |
| 36 | { |
| 37 | svc_fh *fh; |
| 38 | struct posix_acl *acl; |
Al Viro | c4d987b | 2006-10-19 23:29:00 -0700 | [diff] [blame] | 39 | __be32 nfserr = 0; |
Andreas Gruenbacher | a257cdd | 2005-06-22 17:16:26 +0000 | [diff] [blame] | 40 | |
| 41 | dprintk("nfsd: GETACL(2acl) %s\n", SVCFH_fmt(&argp->fh)); |
| 42 | |
| 43 | fh = fh_copy(&resp->fh, &argp->fh); |
Miklos Szeredi | 8837abc | 2008-06-16 13:20:29 +0200 | [diff] [blame] | 44 | nfserr = fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_NOP); |
| 45 | if (nfserr) |
J. Bruce Fields | ac8587d | 2007-11-12 16:05:02 -0500 | [diff] [blame] | 46 | RETURN_STATUS(nfserr); |
Andreas Gruenbacher | a257cdd | 2005-06-22 17:16:26 +0000 | [diff] [blame] | 47 | |
| 48 | if (argp->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT)) |
| 49 | RETURN_STATUS(nfserr_inval); |
| 50 | resp->mask = argp->mask; |
| 51 | |
| 52 | if (resp->mask & (NFS_ACL|NFS_ACLCNT)) { |
| 53 | acl = nfsd_get_posix_acl(fh, ACL_TYPE_ACCESS); |
| 54 | if (IS_ERR(acl)) { |
| 55 | int err = PTR_ERR(acl); |
| 56 | |
| 57 | if (err == -ENODATA || err == -EOPNOTSUPP) |
| 58 | acl = NULL; |
| 59 | else { |
| 60 | nfserr = nfserrno(err); |
| 61 | goto fail; |
| 62 | } |
| 63 | } |
| 64 | if (acl == NULL) { |
| 65 | /* Solaris returns the inode's minimum ACL. */ |
| 66 | |
| 67 | struct inode *inode = fh->fh_dentry->d_inode; |
| 68 | acl = posix_acl_from_mode(inode->i_mode, GFP_KERNEL); |
| 69 | } |
| 70 | resp->acl_access = acl; |
| 71 | } |
| 72 | if (resp->mask & (NFS_DFACL|NFS_DFACLCNT)) { |
| 73 | /* Check how Solaris handles requests for the Default ACL |
| 74 | of a non-directory! */ |
| 75 | |
| 76 | acl = nfsd_get_posix_acl(fh, ACL_TYPE_DEFAULT); |
| 77 | if (IS_ERR(acl)) { |
| 78 | int err = PTR_ERR(acl); |
| 79 | |
| 80 | if (err == -ENODATA || err == -EOPNOTSUPP) |
| 81 | acl = NULL; |
| 82 | else { |
| 83 | nfserr = nfserrno(err); |
| 84 | goto fail; |
| 85 | } |
| 86 | } |
| 87 | resp->acl_default = acl; |
| 88 | } |
| 89 | |
| 90 | /* resp->acl_{access,default} are released in nfssvc_release_getacl. */ |
| 91 | RETURN_STATUS(0); |
| 92 | |
| 93 | fail: |
| 94 | posix_acl_release(resp->acl_access); |
| 95 | posix_acl_release(resp->acl_default); |
| 96 | RETURN_STATUS(nfserr); |
| 97 | } |
| 98 | |
| 99 | /* |
| 100 | * Set the Access and/or Default ACL of a file. |
| 101 | */ |
Al Viro | 7111c66 | 2006-10-19 23:28:45 -0700 | [diff] [blame] | 102 | static __be32 nfsacld_proc_setacl(struct svc_rqst * rqstp, |
Andreas Gruenbacher | a257cdd | 2005-06-22 17:16:26 +0000 | [diff] [blame] | 103 | struct nfsd3_setaclargs *argp, |
| 104 | struct nfsd_attrstat *resp) |
| 105 | { |
| 106 | svc_fh *fh; |
Al Viro | c4d987b | 2006-10-19 23:29:00 -0700 | [diff] [blame] | 107 | __be32 nfserr = 0; |
Andreas Gruenbacher | a257cdd | 2005-06-22 17:16:26 +0000 | [diff] [blame] | 108 | |
| 109 | dprintk("nfsd: SETACL(2acl) %s\n", SVCFH_fmt(&argp->fh)); |
| 110 | |
| 111 | fh = fh_copy(&resp->fh, &argp->fh); |
Miklos Szeredi | 8837abc | 2008-06-16 13:20:29 +0200 | [diff] [blame] | 112 | nfserr = fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_SATTR); |
Andreas Gruenbacher | a257cdd | 2005-06-22 17:16:26 +0000 | [diff] [blame] | 113 | |
| 114 | if (!nfserr) { |
| 115 | nfserr = nfserrno( nfsd_set_posix_acl( |
| 116 | fh, ACL_TYPE_ACCESS, argp->acl_access) ); |
| 117 | } |
| 118 | if (!nfserr) { |
| 119 | nfserr = nfserrno( nfsd_set_posix_acl( |
| 120 | fh, ACL_TYPE_DEFAULT, argp->acl_default) ); |
| 121 | } |
| 122 | |
| 123 | /* argp->acl_{access,default} may have been allocated in |
| 124 | nfssvc_decode_setaclargs. */ |
| 125 | posix_acl_release(argp->acl_access); |
| 126 | posix_acl_release(argp->acl_default); |
| 127 | return nfserr; |
| 128 | } |
| 129 | |
| 130 | /* |
| 131 | * Check file attributes |
| 132 | */ |
Al Viro | 7111c66 | 2006-10-19 23:28:45 -0700 | [diff] [blame] | 133 | static __be32 nfsacld_proc_getattr(struct svc_rqst * rqstp, |
Andreas Gruenbacher | a257cdd | 2005-06-22 17:16:26 +0000 | [diff] [blame] | 134 | struct nfsd_fhandle *argp, struct nfsd_attrstat *resp) |
| 135 | { |
| 136 | dprintk("nfsd: GETATTR %s\n", SVCFH_fmt(&argp->fh)); |
| 137 | |
| 138 | fh_copy(&resp->fh, &argp->fh); |
Miklos Szeredi | 8837abc | 2008-06-16 13:20:29 +0200 | [diff] [blame] | 139 | return fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_NOP); |
Andreas Gruenbacher | a257cdd | 2005-06-22 17:16:26 +0000 | [diff] [blame] | 140 | } |
| 141 | |
| 142 | /* |
| 143 | * Check file access |
| 144 | */ |
Al Viro | 7111c66 | 2006-10-19 23:28:45 -0700 | [diff] [blame] | 145 | static __be32 nfsacld_proc_access(struct svc_rqst *rqstp, struct nfsd3_accessargs *argp, |
Andreas Gruenbacher | a257cdd | 2005-06-22 17:16:26 +0000 | [diff] [blame] | 146 | struct nfsd3_accessres *resp) |
| 147 | { |
Al Viro | c4d987b | 2006-10-19 23:29:00 -0700 | [diff] [blame] | 148 | __be32 nfserr; |
Andreas Gruenbacher | a257cdd | 2005-06-22 17:16:26 +0000 | [diff] [blame] | 149 | |
| 150 | dprintk("nfsd: ACCESS(2acl) %s 0x%x\n", |
| 151 | SVCFH_fmt(&argp->fh), |
| 152 | argp->access); |
| 153 | |
| 154 | fh_copy(&resp->fh, &argp->fh); |
| 155 | resp->access = argp->access; |
| 156 | nfserr = nfsd_access(rqstp, &resp->fh, &resp->access, NULL); |
| 157 | return nfserr; |
| 158 | } |
| 159 | |
| 160 | /* |
| 161 | * XDR decode functions |
| 162 | */ |
Al Viro | 131a21c | 2006-10-19 23:28:56 -0700 | [diff] [blame] | 163 | static int nfsaclsvc_decode_getaclargs(struct svc_rqst *rqstp, __be32 *p, |
Andreas Gruenbacher | a257cdd | 2005-06-22 17:16:26 +0000 | [diff] [blame] | 164 | struct nfsd3_getaclargs *argp) |
| 165 | { |
| 166 | if (!(p = nfs2svc_decode_fh(p, &argp->fh))) |
| 167 | return 0; |
| 168 | argp->mask = ntohl(*p); p++; |
| 169 | |
| 170 | return xdr_argsize_check(rqstp, p); |
| 171 | } |
| 172 | |
| 173 | |
Al Viro | 131a21c | 2006-10-19 23:28:56 -0700 | [diff] [blame] | 174 | static int nfsaclsvc_decode_setaclargs(struct svc_rqst *rqstp, __be32 *p, |
Andreas Gruenbacher | a257cdd | 2005-06-22 17:16:26 +0000 | [diff] [blame] | 175 | struct nfsd3_setaclargs *argp) |
| 176 | { |
| 177 | struct kvec *head = rqstp->rq_arg.head; |
| 178 | unsigned int base; |
| 179 | int n; |
| 180 | |
| 181 | if (!(p = nfs2svc_decode_fh(p, &argp->fh))) |
| 182 | return 0; |
| 183 | argp->mask = ntohl(*p++); |
| 184 | if (argp->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT) || |
| 185 | !xdr_argsize_check(rqstp, p)) |
| 186 | return 0; |
| 187 | |
| 188 | base = (char *)p - (char *)head->iov_base; |
| 189 | n = nfsacl_decode(&rqstp->rq_arg, base, NULL, |
| 190 | (argp->mask & NFS_ACL) ? |
| 191 | &argp->acl_access : NULL); |
| 192 | if (n > 0) |
| 193 | n = nfsacl_decode(&rqstp->rq_arg, base + n, NULL, |
| 194 | (argp->mask & NFS_DFACL) ? |
| 195 | &argp->acl_default : NULL); |
| 196 | return (n > 0); |
| 197 | } |
| 198 | |
Al Viro | 131a21c | 2006-10-19 23:28:56 -0700 | [diff] [blame] | 199 | static int nfsaclsvc_decode_fhandleargs(struct svc_rqst *rqstp, __be32 *p, |
Andreas Gruenbacher | a257cdd | 2005-06-22 17:16:26 +0000 | [diff] [blame] | 200 | struct nfsd_fhandle *argp) |
| 201 | { |
| 202 | if (!(p = nfs2svc_decode_fh(p, &argp->fh))) |
| 203 | return 0; |
| 204 | return xdr_argsize_check(rqstp, p); |
| 205 | } |
| 206 | |
Al Viro | 131a21c | 2006-10-19 23:28:56 -0700 | [diff] [blame] | 207 | static int nfsaclsvc_decode_accessargs(struct svc_rqst *rqstp, __be32 *p, |
Andreas Gruenbacher | a257cdd | 2005-06-22 17:16:26 +0000 | [diff] [blame] | 208 | struct nfsd3_accessargs *argp) |
| 209 | { |
| 210 | if (!(p = nfs2svc_decode_fh(p, &argp->fh))) |
| 211 | return 0; |
| 212 | argp->access = ntohl(*p++); |
| 213 | |
| 214 | return xdr_argsize_check(rqstp, p); |
| 215 | } |
| 216 | |
| 217 | /* |
| 218 | * XDR encode functions |
| 219 | */ |
| 220 | |
Peter Staubach | 1b7e040 | 2009-11-02 16:59:07 -0500 | [diff] [blame] | 221 | /* |
| 222 | * There must be an encoding function for void results so svc_process |
| 223 | * will work properly. |
| 224 | */ |
| 225 | int |
| 226 | nfsaclsvc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy) |
| 227 | { |
| 228 | return xdr_ressize_check(rqstp, p); |
| 229 | } |
| 230 | |
Andreas Gruenbacher | a257cdd | 2005-06-22 17:16:26 +0000 | [diff] [blame] | 231 | /* GETACL */ |
Al Viro | 131a21c | 2006-10-19 23:28:56 -0700 | [diff] [blame] | 232 | static int nfsaclsvc_encode_getaclres(struct svc_rqst *rqstp, __be32 *p, |
Andreas Gruenbacher | a257cdd | 2005-06-22 17:16:26 +0000 | [diff] [blame] | 233 | struct nfsd3_getaclres *resp) |
| 234 | { |
| 235 | struct dentry *dentry = resp->fh.fh_dentry; |
Prasad P | aefa89d | 2007-10-24 15:14:32 -0500 | [diff] [blame] | 236 | struct inode *inode; |
Andreas Gruenbacher | a257cdd | 2005-06-22 17:16:26 +0000 | [diff] [blame] | 237 | struct kvec *head = rqstp->rq_res.head; |
| 238 | unsigned int base; |
| 239 | int n; |
Jesper Juhl | cb65a5b | 2006-12-08 02:39:39 -0800 | [diff] [blame] | 240 | int w; |
Andreas Gruenbacher | a257cdd | 2005-06-22 17:16:26 +0000 | [diff] [blame] | 241 | |
Prasad P | aefa89d | 2007-10-24 15:14:32 -0500 | [diff] [blame] | 242 | /* |
| 243 | * Since this is version 2, the check for nfserr in |
| 244 | * nfsd_dispatch actually ensures the following cannot happen. |
| 245 | * However, it seems fragile to depend on that. |
| 246 | */ |
Andreas Gruenbacher | a257cdd | 2005-06-22 17:16:26 +0000 | [diff] [blame] | 247 | if (dentry == NULL || dentry->d_inode == NULL) |
| 248 | return 0; |
| 249 | inode = dentry->d_inode; |
| 250 | |
| 251 | p = nfs2svc_encode_fattr(rqstp, p, &resp->fh); |
| 252 | *p++ = htonl(resp->mask); |
| 253 | if (!xdr_ressize_check(rqstp, p)) |
| 254 | return 0; |
| 255 | base = (char *)p - (char *)head->iov_base; |
| 256 | |
Jesper Juhl | cb65a5b | 2006-12-08 02:39:39 -0800 | [diff] [blame] | 257 | rqstp->rq_res.page_len = w = nfsacl_size( |
| 258 | (resp->mask & NFS_ACL) ? resp->acl_access : NULL, |
| 259 | (resp->mask & NFS_DFACL) ? resp->acl_default : NULL); |
Andreas Gruenbacher | a257cdd | 2005-06-22 17:16:26 +0000 | [diff] [blame] | 260 | while (w > 0) { |
NeilBrown | 4452435 | 2006-10-04 02:15:46 -0700 | [diff] [blame] | 261 | if (!rqstp->rq_respages[rqstp->rq_resused++]) |
Andreas Gruenbacher | a257cdd | 2005-06-22 17:16:26 +0000 | [diff] [blame] | 262 | return 0; |
| 263 | w -= PAGE_SIZE; |
| 264 | } |
| 265 | |
| 266 | n = nfsacl_encode(&rqstp->rq_res, base, inode, |
| 267 | resp->acl_access, |
| 268 | resp->mask & NFS_ACL, 0); |
| 269 | if (n > 0) |
| 270 | n = nfsacl_encode(&rqstp->rq_res, base + n, inode, |
| 271 | resp->acl_default, |
| 272 | resp->mask & NFS_DFACL, |
| 273 | NFS_ACL_DEFAULT); |
| 274 | if (n <= 0) |
| 275 | return 0; |
| 276 | return 1; |
| 277 | } |
| 278 | |
Al Viro | 131a21c | 2006-10-19 23:28:56 -0700 | [diff] [blame] | 279 | static int nfsaclsvc_encode_attrstatres(struct svc_rqst *rqstp, __be32 *p, |
Andreas Gruenbacher | a257cdd | 2005-06-22 17:16:26 +0000 | [diff] [blame] | 280 | struct nfsd_attrstat *resp) |
| 281 | { |
| 282 | p = nfs2svc_encode_fattr(rqstp, p, &resp->fh); |
| 283 | return xdr_ressize_check(rqstp, p); |
| 284 | } |
| 285 | |
| 286 | /* ACCESS */ |
Al Viro | 131a21c | 2006-10-19 23:28:56 -0700 | [diff] [blame] | 287 | static int nfsaclsvc_encode_accessres(struct svc_rqst *rqstp, __be32 *p, |
Andreas Gruenbacher | a257cdd | 2005-06-22 17:16:26 +0000 | [diff] [blame] | 288 | struct nfsd3_accessres *resp) |
| 289 | { |
| 290 | p = nfs2svc_encode_fattr(rqstp, p, &resp->fh); |
| 291 | *p++ = htonl(resp->access); |
| 292 | return xdr_ressize_check(rqstp, p); |
| 293 | } |
| 294 | |
| 295 | /* |
| 296 | * XDR release functions |
| 297 | */ |
Al Viro | 131a21c | 2006-10-19 23:28:56 -0700 | [diff] [blame] | 298 | static int nfsaclsvc_release_getacl(struct svc_rqst *rqstp, __be32 *p, |
Andreas Gruenbacher | a257cdd | 2005-06-22 17:16:26 +0000 | [diff] [blame] | 299 | struct nfsd3_getaclres *resp) |
| 300 | { |
| 301 | fh_put(&resp->fh); |
| 302 | posix_acl_release(resp->acl_access); |
| 303 | posix_acl_release(resp->acl_default); |
| 304 | return 1; |
| 305 | } |
| 306 | |
Greg Banks | c9ce228 | 2007-02-20 10:12:34 +1100 | [diff] [blame] | 307 | static int nfsaclsvc_release_attrstat(struct svc_rqst *rqstp, __be32 *p, |
| 308 | struct nfsd_attrstat *resp) |
Andreas Gruenbacher | a257cdd | 2005-06-22 17:16:26 +0000 | [diff] [blame] | 309 | { |
| 310 | fh_put(&resp->fh); |
| 311 | return 1; |
| 312 | } |
| 313 | |
Greg Banks | c9ce228 | 2007-02-20 10:12:34 +1100 | [diff] [blame] | 314 | static int nfsaclsvc_release_access(struct svc_rqst *rqstp, __be32 *p, |
| 315 | struct nfsd3_accessres *resp) |
| 316 | { |
| 317 | fh_put(&resp->fh); |
| 318 | return 1; |
| 319 | } |
| 320 | |
Andreas Gruenbacher | a257cdd | 2005-06-22 17:16:26 +0000 | [diff] [blame] | 321 | #define nfsaclsvc_decode_voidargs NULL |
Andreas Gruenbacher | a257cdd | 2005-06-22 17:16:26 +0000 | [diff] [blame] | 322 | #define nfsaclsvc_release_void NULL |
| 323 | #define nfsd3_fhandleargs nfsd_fhandle |
| 324 | #define nfsd3_attrstatres nfsd_attrstat |
| 325 | #define nfsd3_voidres nfsd3_voidargs |
| 326 | struct nfsd3_voidargs { int dummy; }; |
| 327 | |
| 328 | #define PROC(name, argt, rest, relt, cache, respsize) \ |
| 329 | { (svc_procfunc) nfsacld_proc_##name, \ |
| 330 | (kxdrproc_t) nfsaclsvc_decode_##argt##args, \ |
| 331 | (kxdrproc_t) nfsaclsvc_encode_##rest##res, \ |
| 332 | (kxdrproc_t) nfsaclsvc_release_##relt, \ |
| 333 | sizeof(struct nfsd3_##argt##args), \ |
| 334 | sizeof(struct nfsd3_##rest##res), \ |
| 335 | 0, \ |
| 336 | cache, \ |
| 337 | respsize, \ |
| 338 | } |
| 339 | |
| 340 | #define ST 1 /* status*/ |
| 341 | #define AT 21 /* attributes */ |
| 342 | #define pAT (1+AT) /* post attributes - conditional */ |
| 343 | #define ACL (1+NFS_ACL_MAX_ENTRIES*3) /* Access Control List */ |
| 344 | |
| 345 | static struct svc_procedure nfsd_acl_procedures2[] = { |
| 346 | PROC(null, void, void, void, RC_NOCACHE, ST), |
| 347 | PROC(getacl, getacl, getacl, getacl, RC_NOCACHE, ST+1+2*(1+ACL)), |
Greg Banks | c9ce228 | 2007-02-20 10:12:34 +1100 | [diff] [blame] | 348 | PROC(setacl, setacl, attrstat, attrstat, RC_NOCACHE, ST+AT), |
| 349 | PROC(getattr, fhandle, attrstat, attrstat, RC_NOCACHE, ST+AT), |
| 350 | PROC(access, access, access, access, RC_NOCACHE, ST+AT+1), |
Andreas Gruenbacher | a257cdd | 2005-06-22 17:16:26 +0000 | [diff] [blame] | 351 | }; |
| 352 | |
| 353 | struct svc_version nfsd_acl_version2 = { |
| 354 | .vs_vers = 2, |
| 355 | .vs_nproc = 5, |
| 356 | .vs_proc = nfsd_acl_procedures2, |
| 357 | .vs_dispatch = nfsd_dispatch, |
| 358 | .vs_xdrsize = NFS3_SVC_XDRSIZE, |
Peter Staubach | 1b7e040 | 2009-11-02 16:59:07 -0500 | [diff] [blame] | 359 | .vs_hidden = 0, |
Andreas Gruenbacher | a257cdd | 2005-06-22 17:16:26 +0000 | [diff] [blame] | 360 | }; |