Andreas Gruenbacher | a257cdd | 2005-06-22 17:16:26 +0000 | [diff] [blame] | 1 | /* |
| 2 | * linux/fs/nfsd/nfs3acl.c |
| 3 | * |
| 4 | * Process version 3 NFSACL requests. |
| 5 | * |
| 6 | * Copyright (C) 2002-2003 Andreas Gruenbacher <agruen@suse.de> |
| 7 | */ |
| 8 | |
| 9 | #include <linux/sunrpc/svc.h> |
| 10 | #include <linux/nfs3.h> |
| 11 | #include <linux/nfsd/nfsd.h> |
| 12 | #include <linux/nfsd/cache.h> |
| 13 | #include <linux/nfsd/xdr3.h> |
| 14 | #include <linux/posix_acl.h> |
| 15 | #include <linux/nfsacl.h> |
| 16 | |
| 17 | #define RETURN_STATUS(st) { resp->status = (st); return (st); } |
| 18 | |
| 19 | /* |
| 20 | * NULL call. |
| 21 | */ |
Al Viro | 7111c66 | 2006-10-19 23:28:45 -0700 | [diff] [blame] | 22 | static __be32 |
Andreas Gruenbacher | a257cdd | 2005-06-22 17:16:26 +0000 | [diff] [blame] | 23 | nfsd3_proc_null(struct svc_rqst *rqstp, void *argp, void *resp) |
| 24 | { |
| 25 | return nfs_ok; |
| 26 | } |
| 27 | |
| 28 | /* |
| 29 | * Get the Access and/or Default ACL of a file. |
| 30 | */ |
Al Viro | 7111c66 | 2006-10-19 23:28:45 -0700 | [diff] [blame] | 31 | static __be32 nfsd3_proc_getacl(struct svc_rqst * rqstp, |
Andreas Gruenbacher | a257cdd | 2005-06-22 17:16:26 +0000 | [diff] [blame] | 32 | struct nfsd3_getaclargs *argp, struct nfsd3_getaclres *resp) |
| 33 | { |
| 34 | svc_fh *fh; |
| 35 | struct posix_acl *acl; |
Al Viro | c4d987b | 2006-10-19 23:29:00 -0700 | [diff] [blame] | 36 | __be32 nfserr = 0; |
Andreas Gruenbacher | a257cdd | 2005-06-22 17:16:26 +0000 | [diff] [blame] | 37 | |
| 38 | fh = fh_copy(&resp->fh, &argp->fh); |
| 39 | if ((nfserr = fh_verify(rqstp, &resp->fh, 0, MAY_NOP))) |
| 40 | RETURN_STATUS(nfserr_inval); |
| 41 | |
| 42 | if (argp->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT)) |
| 43 | RETURN_STATUS(nfserr_inval); |
| 44 | resp->mask = argp->mask; |
| 45 | |
| 46 | if (resp->mask & (NFS_ACL|NFS_ACLCNT)) { |
| 47 | acl = nfsd_get_posix_acl(fh, ACL_TYPE_ACCESS); |
| 48 | if (IS_ERR(acl)) { |
| 49 | int err = PTR_ERR(acl); |
| 50 | |
| 51 | if (err == -ENODATA || err == -EOPNOTSUPP) |
| 52 | acl = NULL; |
| 53 | else { |
| 54 | nfserr = nfserrno(err); |
| 55 | goto fail; |
| 56 | } |
| 57 | } |
| 58 | if (acl == NULL) { |
| 59 | /* Solaris returns the inode's minimum ACL. */ |
| 60 | |
| 61 | struct inode *inode = fh->fh_dentry->d_inode; |
| 62 | acl = posix_acl_from_mode(inode->i_mode, GFP_KERNEL); |
| 63 | } |
| 64 | resp->acl_access = acl; |
| 65 | } |
| 66 | if (resp->mask & (NFS_DFACL|NFS_DFACLCNT)) { |
| 67 | /* Check how Solaris handles requests for the Default ACL |
| 68 | of a non-directory! */ |
| 69 | |
| 70 | acl = nfsd_get_posix_acl(fh, ACL_TYPE_DEFAULT); |
| 71 | if (IS_ERR(acl)) { |
| 72 | int err = PTR_ERR(acl); |
| 73 | |
| 74 | if (err == -ENODATA || err == -EOPNOTSUPP) |
| 75 | acl = NULL; |
| 76 | else { |
| 77 | nfserr = nfserrno(err); |
| 78 | goto fail; |
| 79 | } |
| 80 | } |
| 81 | resp->acl_default = acl; |
| 82 | } |
| 83 | |
| 84 | /* resp->acl_{access,default} are released in nfs3svc_release_getacl. */ |
| 85 | RETURN_STATUS(0); |
| 86 | |
| 87 | fail: |
| 88 | posix_acl_release(resp->acl_access); |
| 89 | posix_acl_release(resp->acl_default); |
| 90 | RETURN_STATUS(nfserr); |
| 91 | } |
| 92 | |
| 93 | /* |
| 94 | * Set the Access and/or Default ACL of a file. |
| 95 | */ |
Al Viro | 7111c66 | 2006-10-19 23:28:45 -0700 | [diff] [blame] | 96 | static __be32 nfsd3_proc_setacl(struct svc_rqst * rqstp, |
Andreas Gruenbacher | a257cdd | 2005-06-22 17:16:26 +0000 | [diff] [blame] | 97 | struct nfsd3_setaclargs *argp, |
| 98 | struct nfsd3_attrstat *resp) |
| 99 | { |
| 100 | svc_fh *fh; |
Al Viro | c4d987b | 2006-10-19 23:29:00 -0700 | [diff] [blame] | 101 | __be32 nfserr = 0; |
Andreas Gruenbacher | a257cdd | 2005-06-22 17:16:26 +0000 | [diff] [blame] | 102 | |
| 103 | fh = fh_copy(&resp->fh, &argp->fh); |
Andreas Gruenbacher | b7964c3 | 2005-12-20 16:29:05 +0100 | [diff] [blame] | 104 | nfserr = fh_verify(rqstp, &resp->fh, 0, MAY_SATTR); |
Andreas Gruenbacher | a257cdd | 2005-06-22 17:16:26 +0000 | [diff] [blame] | 105 | |
| 106 | if (!nfserr) { |
| 107 | nfserr = nfserrno( nfsd_set_posix_acl( |
| 108 | fh, ACL_TYPE_ACCESS, argp->acl_access) ); |
| 109 | } |
| 110 | if (!nfserr) { |
| 111 | nfserr = nfserrno( nfsd_set_posix_acl( |
| 112 | fh, ACL_TYPE_DEFAULT, argp->acl_default) ); |
| 113 | } |
| 114 | |
| 115 | /* argp->acl_{access,default} may have been allocated in |
| 116 | nfs3svc_decode_setaclargs. */ |
| 117 | posix_acl_release(argp->acl_access); |
| 118 | posix_acl_release(argp->acl_default); |
| 119 | RETURN_STATUS(nfserr); |
| 120 | } |
| 121 | |
| 122 | /* |
| 123 | * XDR decode functions |
| 124 | */ |
Al Viro | 91f0716 | 2006-10-19 23:28:57 -0700 | [diff] [blame] | 125 | static int nfs3svc_decode_getaclargs(struct svc_rqst *rqstp, __be32 *p, |
Andreas Gruenbacher | a257cdd | 2005-06-22 17:16:26 +0000 | [diff] [blame] | 126 | struct nfsd3_getaclargs *args) |
| 127 | { |
| 128 | if (!(p = nfs3svc_decode_fh(p, &args->fh))) |
| 129 | return 0; |
| 130 | args->mask = ntohl(*p); p++; |
| 131 | |
| 132 | return xdr_argsize_check(rqstp, p); |
| 133 | } |
| 134 | |
| 135 | |
Al Viro | 91f0716 | 2006-10-19 23:28:57 -0700 | [diff] [blame] | 136 | static int nfs3svc_decode_setaclargs(struct svc_rqst *rqstp, __be32 *p, |
Andreas Gruenbacher | a257cdd | 2005-06-22 17:16:26 +0000 | [diff] [blame] | 137 | struct nfsd3_setaclargs *args) |
| 138 | { |
| 139 | struct kvec *head = rqstp->rq_arg.head; |
| 140 | unsigned int base; |
| 141 | int n; |
| 142 | |
| 143 | if (!(p = nfs3svc_decode_fh(p, &args->fh))) |
| 144 | return 0; |
| 145 | args->mask = ntohl(*p++); |
| 146 | if (args->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT) || |
| 147 | !xdr_argsize_check(rqstp, p)) |
| 148 | return 0; |
| 149 | |
| 150 | base = (char *)p - (char *)head->iov_base; |
| 151 | n = nfsacl_decode(&rqstp->rq_arg, base, NULL, |
| 152 | (args->mask & NFS_ACL) ? |
| 153 | &args->acl_access : NULL); |
| 154 | if (n > 0) |
| 155 | n = nfsacl_decode(&rqstp->rq_arg, base + n, NULL, |
| 156 | (args->mask & NFS_DFACL) ? |
| 157 | &args->acl_default : NULL); |
| 158 | return (n > 0); |
| 159 | } |
| 160 | |
| 161 | /* |
| 162 | * XDR encode functions |
| 163 | */ |
| 164 | |
| 165 | /* GETACL */ |
Al Viro | 91f0716 | 2006-10-19 23:28:57 -0700 | [diff] [blame] | 166 | static int nfs3svc_encode_getaclres(struct svc_rqst *rqstp, __be32 *p, |
Andreas Gruenbacher | a257cdd | 2005-06-22 17:16:26 +0000 | [diff] [blame] | 167 | struct nfsd3_getaclres *resp) |
| 168 | { |
| 169 | struct dentry *dentry = resp->fh.fh_dentry; |
| 170 | |
| 171 | p = nfs3svc_encode_post_op_attr(rqstp, p, &resp->fh); |
| 172 | if (resp->status == 0 && dentry && dentry->d_inode) { |
| 173 | struct inode *inode = dentry->d_inode; |
| 174 | int w = nfsacl_size( |
| 175 | (resp->mask & NFS_ACL) ? resp->acl_access : NULL, |
| 176 | (resp->mask & NFS_DFACL) ? resp->acl_default : NULL); |
| 177 | struct kvec *head = rqstp->rq_res.head; |
| 178 | unsigned int base; |
| 179 | int n; |
| 180 | |
| 181 | *p++ = htonl(resp->mask); |
| 182 | if (!xdr_ressize_check(rqstp, p)) |
| 183 | return 0; |
| 184 | base = (char *)p - (char *)head->iov_base; |
| 185 | |
| 186 | rqstp->rq_res.page_len = w; |
| 187 | while (w > 0) { |
NeilBrown | 4452435 | 2006-10-04 02:15:46 -0700 | [diff] [blame] | 188 | if (!rqstp->rq_respages[rqstp->rq_resused++]) |
Andreas Gruenbacher | a257cdd | 2005-06-22 17:16:26 +0000 | [diff] [blame] | 189 | return 0; |
| 190 | w -= PAGE_SIZE; |
| 191 | } |
| 192 | |
| 193 | n = nfsacl_encode(&rqstp->rq_res, base, inode, |
| 194 | resp->acl_access, |
| 195 | resp->mask & NFS_ACL, 0); |
| 196 | if (n > 0) |
| 197 | n = nfsacl_encode(&rqstp->rq_res, base + n, inode, |
| 198 | resp->acl_default, |
| 199 | resp->mask & NFS_DFACL, |
| 200 | NFS_ACL_DEFAULT); |
| 201 | if (n <= 0) |
| 202 | return 0; |
| 203 | } else |
| 204 | if (!xdr_ressize_check(rqstp, p)) |
| 205 | return 0; |
| 206 | |
| 207 | return 1; |
| 208 | } |
| 209 | |
| 210 | /* SETACL */ |
Al Viro | 91f0716 | 2006-10-19 23:28:57 -0700 | [diff] [blame] | 211 | static int nfs3svc_encode_setaclres(struct svc_rqst *rqstp, __be32 *p, |
Andreas Gruenbacher | a257cdd | 2005-06-22 17:16:26 +0000 | [diff] [blame] | 212 | struct nfsd3_attrstat *resp) |
| 213 | { |
| 214 | p = nfs3svc_encode_post_op_attr(rqstp, p, &resp->fh); |
| 215 | |
| 216 | return xdr_ressize_check(rqstp, p); |
| 217 | } |
| 218 | |
| 219 | /* |
| 220 | * XDR release functions |
| 221 | */ |
Al Viro | 91f0716 | 2006-10-19 23:28:57 -0700 | [diff] [blame] | 222 | static int nfs3svc_release_getacl(struct svc_rqst *rqstp, __be32 *p, |
Andreas Gruenbacher | a257cdd | 2005-06-22 17:16:26 +0000 | [diff] [blame] | 223 | struct nfsd3_getaclres *resp) |
| 224 | { |
| 225 | fh_put(&resp->fh); |
| 226 | posix_acl_release(resp->acl_access); |
| 227 | posix_acl_release(resp->acl_default); |
| 228 | return 1; |
| 229 | } |
| 230 | |
| 231 | #define nfs3svc_decode_voidargs NULL |
| 232 | #define nfs3svc_release_void NULL |
| 233 | #define nfsd3_setaclres nfsd3_attrstat |
| 234 | #define nfsd3_voidres nfsd3_voidargs |
| 235 | struct nfsd3_voidargs { int dummy; }; |
| 236 | |
| 237 | #define PROC(name, argt, rest, relt, cache, respsize) \ |
| 238 | { (svc_procfunc) nfsd3_proc_##name, \ |
| 239 | (kxdrproc_t) nfs3svc_decode_##argt##args, \ |
| 240 | (kxdrproc_t) nfs3svc_encode_##rest##res, \ |
| 241 | (kxdrproc_t) nfs3svc_release_##relt, \ |
| 242 | sizeof(struct nfsd3_##argt##args), \ |
| 243 | sizeof(struct nfsd3_##rest##res), \ |
| 244 | 0, \ |
| 245 | cache, \ |
| 246 | respsize, \ |
| 247 | } |
| 248 | |
| 249 | #define ST 1 /* status*/ |
| 250 | #define AT 21 /* attributes */ |
| 251 | #define pAT (1+AT) /* post attributes - conditional */ |
| 252 | #define ACL (1+NFS_ACL_MAX_ENTRIES*3) /* Access Control List */ |
| 253 | |
| 254 | static struct svc_procedure nfsd_acl_procedures3[] = { |
| 255 | PROC(null, void, void, void, RC_NOCACHE, ST), |
| 256 | PROC(getacl, getacl, getacl, getacl, RC_NOCACHE, ST+1+2*(1+ACL)), |
| 257 | PROC(setacl, setacl, setacl, fhandle, RC_NOCACHE, ST+pAT), |
| 258 | }; |
| 259 | |
| 260 | struct svc_version nfsd_acl_version3 = { |
| 261 | .vs_vers = 3, |
| 262 | .vs_nproc = 3, |
| 263 | .vs_proc = nfsd_acl_procedures3, |
| 264 | .vs_dispatch = nfsd_dispatch, |
| 265 | .vs_xdrsize = NFS3_SVC_XDRSIZE, |
Olaf Kirch | bc5fea4 | 2006-10-04 02:16:05 -0700 | [diff] [blame] | 266 | .vs_hidden = 1, |
Andreas Gruenbacher | a257cdd | 2005-06-22 17:16:26 +0000 | [diff] [blame] | 267 | }; |
| 268 | |