blob: d08cd88155c75278c4607f49c078622bf87ab5ee [file] [log] [blame]
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +00001/*
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +00002 * Process version 2 NFSACL requests.
3 *
4 * Copyright (C) 2002-2003 Andreas Gruenbacher <agruen@suse.de>
5 */
6
Boaz Harrosh9a74af22009-12-03 20:30:56 +02007#include "nfsd.h"
8/* FIXME: nfsacl.h is a broken header */
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +00009#include <linux/nfsacl.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090010#include <linux/gfp.h>
Boaz Harrosh9a74af22009-12-03 20:30:56 +020011#include "cache.h"
12#include "xdr3.h"
J. Bruce Fields0a3adad2009-11-04 18:12:35 -050013#include "vfs.h"
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +000014
15#define NFSDDBG_FACILITY NFSDDBG_PROC
16#define RETURN_STATUS(st) { resp->status = (st); return (st); }
17
18/*
19 * NULL call.
20 */
Al Viro7111c662006-10-19 23:28:45 -070021static __be32
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +000022nfsacld_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
23{
24 return nfs_ok;
25}
26
27/*
28 * Get the Access and/or Default ACL of a file.
29 */
Al Viro7111c662006-10-19 23:28:45 -070030static __be32 nfsacld_proc_getacl(struct svc_rqst * rqstp,
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +000031 struct nfsd3_getaclargs *argp, struct nfsd3_getaclres *resp)
32{
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +000033 struct posix_acl *acl;
Christoph Hellwig4ac72492013-12-20 05:16:55 -080034 struct inode *inode;
35 svc_fh *fh;
Al Viroc4d987b2006-10-19 23:29:00 -070036 __be32 nfserr = 0;
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +000037
38 dprintk("nfsd: GETACL(2acl) %s\n", SVCFH_fmt(&argp->fh));
39
40 fh = fh_copy(&resp->fh, &argp->fh);
Miklos Szeredi8837abc2008-06-16 13:20:29 +020041 nfserr = fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_NOP);
42 if (nfserr)
J. Bruce Fieldsac8587d2007-11-12 16:05:02 -050043 RETURN_STATUS(nfserr);
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +000044
David Howells2b0143b2015-03-17 22:25:59 +000045 inode = d_inode(fh->fh_dentry);
Christoph Hellwig4ac72492013-12-20 05:16:55 -080046
Kinglong Mee7b8f4582015-07-03 19:39:02 +080047 if (argp->mask & ~NFS_ACL_MASK)
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +000048 RETURN_STATUS(nfserr_inval);
49 resp->mask = argp->mask;
50
J. Bruce Fields4f4a4fa2013-02-01 15:13:04 -050051 nfserr = fh_getattr(fh, &resp->stat);
52 if (nfserr)
Kinglong Mee7b8f4582015-07-03 19:39:02 +080053 RETURN_STATUS(nfserr);
J. Bruce Fields4f4a4fa2013-02-01 15:13:04 -050054
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +000055 if (resp->mask & (NFS_ACL|NFS_ACLCNT)) {
Christoph Hellwig4ac72492013-12-20 05:16:55 -080056 acl = get_acl(inode, ACL_TYPE_ACCESS);
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +000057 if (acl == NULL) {
58 /* Solaris returns the inode's minimum ACL. */
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +000059 acl = posix_acl_from_mode(inode->i_mode, GFP_KERNEL);
60 }
Kinglong Mee35e634b2014-07-09 21:54:16 +080061 if (IS_ERR(acl)) {
62 nfserr = nfserrno(PTR_ERR(acl));
63 goto fail;
64 }
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +000065 resp->acl_access = acl;
66 }
67 if (resp->mask & (NFS_DFACL|NFS_DFACLCNT)) {
68 /* Check how Solaris handles requests for the Default ACL
69 of a non-directory! */
Christoph Hellwig4ac72492013-12-20 05:16:55 -080070 acl = get_acl(inode, ACL_TYPE_DEFAULT);
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +000071 if (IS_ERR(acl)) {
Christoph Hellwig4ac72492013-12-20 05:16:55 -080072 nfserr = nfserrno(PTR_ERR(acl));
73 goto fail;
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +000074 }
75 resp->acl_default = acl;
76 }
77
78 /* resp->acl_{access,default} are released in nfssvc_release_getacl. */
79 RETURN_STATUS(0);
80
81fail:
82 posix_acl_release(resp->acl_access);
83 posix_acl_release(resp->acl_default);
84 RETURN_STATUS(nfserr);
85}
86
87/*
88 * Set the Access and/or Default ACL of a file.
89 */
Al Viro7111c662006-10-19 23:28:45 -070090static __be32 nfsacld_proc_setacl(struct svc_rqst * rqstp,
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +000091 struct nfsd3_setaclargs *argp,
92 struct nfsd_attrstat *resp)
93{
Christoph Hellwig4ac72492013-12-20 05:16:55 -080094 struct inode *inode;
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +000095 svc_fh *fh;
Al Viroc4d987b2006-10-19 23:29:00 -070096 __be32 nfserr = 0;
Christoph Hellwig4ac72492013-12-20 05:16:55 -080097 int error;
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +000098
99 dprintk("nfsd: SETACL(2acl) %s\n", SVCFH_fmt(&argp->fh));
100
101 fh = fh_copy(&resp->fh, &argp->fh);
Miklos Szeredi8837abc2008-06-16 13:20:29 +0200102 nfserr = fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_SATTR);
Christoph Hellwig4ac72492013-12-20 05:16:55 -0800103 if (nfserr)
104 goto out;
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000105
David Howells2b0143b2015-03-17 22:25:59 +0000106 inode = d_inode(fh->fh_dentry);
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000107
Christoph Hellwig4ac72492013-12-20 05:16:55 -0800108 error = fh_want_write(fh);
109 if (error)
110 goto out_errno;
111
Ben Hutchings99965372016-06-22 19:43:35 +0100112 fh_lock(fh);
113
114 error = set_posix_acl(inode, ACL_TYPE_ACCESS, argp->acl_access);
Christoph Hellwig4ac72492013-12-20 05:16:55 -0800115 if (error)
Ben Hutchings99965372016-06-22 19:43:35 +0100116 goto out_drop_lock;
117 error = set_posix_acl(inode, ACL_TYPE_DEFAULT, argp->acl_default);
Christoph Hellwig4ac72492013-12-20 05:16:55 -0800118 if (error)
Ben Hutchings99965372016-06-22 19:43:35 +0100119 goto out_drop_lock;
120
121 fh_unlock(fh);
Christoph Hellwig4ac72492013-12-20 05:16:55 -0800122
123 fh_drop_write(fh);
124
125 nfserr = fh_getattr(fh, &resp->stat);
126
127out:
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000128 /* argp->acl_{access,default} may have been allocated in
129 nfssvc_decode_setaclargs. */
130 posix_acl_release(argp->acl_access);
131 posix_acl_release(argp->acl_default);
132 return nfserr;
Ben Hutchings99965372016-06-22 19:43:35 +0100133out_drop_lock:
134 fh_unlock(fh);
Christoph Hellwig4ac72492013-12-20 05:16:55 -0800135 fh_drop_write(fh);
136out_errno:
137 nfserr = nfserrno(error);
138 goto out;
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000139}
140
141/*
142 * Check file attributes
143 */
Al Viro7111c662006-10-19 23:28:45 -0700144static __be32 nfsacld_proc_getattr(struct svc_rqst * rqstp,
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000145 struct nfsd_fhandle *argp, struct nfsd_attrstat *resp)
146{
J. Bruce Fields4f4a4fa2013-02-01 15:13:04 -0500147 __be32 nfserr;
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000148 dprintk("nfsd: GETATTR %s\n", SVCFH_fmt(&argp->fh));
149
150 fh_copy(&resp->fh, &argp->fh);
J. Bruce Fields4f4a4fa2013-02-01 15:13:04 -0500151 nfserr = fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_NOP);
152 if (nfserr)
153 return nfserr;
154 nfserr = fh_getattr(&resp->fh, &resp->stat);
155 return nfserr;
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000156}
157
158/*
159 * Check file access
160 */
Al Viro7111c662006-10-19 23:28:45 -0700161static __be32 nfsacld_proc_access(struct svc_rqst *rqstp, struct nfsd3_accessargs *argp,
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000162 struct nfsd3_accessres *resp)
163{
Al Viroc4d987b2006-10-19 23:29:00 -0700164 __be32 nfserr;
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000165
166 dprintk("nfsd: ACCESS(2acl) %s 0x%x\n",
167 SVCFH_fmt(&argp->fh),
168 argp->access);
169
170 fh_copy(&resp->fh, &argp->fh);
171 resp->access = argp->access;
172 nfserr = nfsd_access(rqstp, &resp->fh, &resp->access, NULL);
J. Bruce Fields4f4a4fa2013-02-01 15:13:04 -0500173 if (nfserr)
174 return nfserr;
175 nfserr = fh_getattr(&resp->fh, &resp->stat);
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000176 return nfserr;
177}
178
179/*
180 * XDR decode functions
181 */
Al Viro131a21c2006-10-19 23:28:56 -0700182static int nfsaclsvc_decode_getaclargs(struct svc_rqst *rqstp, __be32 *p,
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000183 struct nfsd3_getaclargs *argp)
184{
Benoit Tained40aa332014-05-22 16:32:30 +0200185 p = nfs2svc_decode_fh(p, &argp->fh);
186 if (!p)
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000187 return 0;
188 argp->mask = ntohl(*p); p++;
189
190 return xdr_argsize_check(rqstp, p);
191}
192
193
Al Viro131a21c2006-10-19 23:28:56 -0700194static int nfsaclsvc_decode_setaclargs(struct svc_rqst *rqstp, __be32 *p,
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000195 struct nfsd3_setaclargs *argp)
196{
197 struct kvec *head = rqstp->rq_arg.head;
198 unsigned int base;
199 int n;
200
Benoit Tained40aa332014-05-22 16:32:30 +0200201 p = nfs2svc_decode_fh(p, &argp->fh);
202 if (!p)
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000203 return 0;
204 argp->mask = ntohl(*p++);
Kinglong Mee7b8f4582015-07-03 19:39:02 +0800205 if (argp->mask & ~NFS_ACL_MASK ||
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000206 !xdr_argsize_check(rqstp, p))
207 return 0;
208
209 base = (char *)p - (char *)head->iov_base;
210 n = nfsacl_decode(&rqstp->rq_arg, base, NULL,
211 (argp->mask & NFS_ACL) ?
212 &argp->acl_access : NULL);
213 if (n > 0)
214 n = nfsacl_decode(&rqstp->rq_arg, base + n, NULL,
215 (argp->mask & NFS_DFACL) ?
216 &argp->acl_default : NULL);
217 return (n > 0);
218}
219
Al Viro131a21c2006-10-19 23:28:56 -0700220static int nfsaclsvc_decode_fhandleargs(struct svc_rqst *rqstp, __be32 *p,
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000221 struct nfsd_fhandle *argp)
222{
Benoit Tained40aa332014-05-22 16:32:30 +0200223 p = nfs2svc_decode_fh(p, &argp->fh);
224 if (!p)
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000225 return 0;
226 return xdr_argsize_check(rqstp, p);
227}
228
Al Viro131a21c2006-10-19 23:28:56 -0700229static int nfsaclsvc_decode_accessargs(struct svc_rqst *rqstp, __be32 *p,
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000230 struct nfsd3_accessargs *argp)
231{
Benoit Tained40aa332014-05-22 16:32:30 +0200232 p = nfs2svc_decode_fh(p, &argp->fh);
233 if (!p)
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000234 return 0;
235 argp->access = ntohl(*p++);
236
237 return xdr_argsize_check(rqstp, p);
238}
239
240/*
241 * XDR encode functions
242 */
243
Peter Staubach1b7e0402009-11-02 16:59:07 -0500244/*
245 * There must be an encoding function for void results so svc_process
246 * will work properly.
247 */
J. Bruce Fields9c0b0ff2012-07-27 14:16:05 -0400248static int nfsaclsvc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
Peter Staubach1b7e0402009-11-02 16:59:07 -0500249{
250 return xdr_ressize_check(rqstp, p);
251}
252
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000253/* GETACL */
Al Viro131a21c2006-10-19 23:28:56 -0700254static int nfsaclsvc_encode_getaclres(struct svc_rqst *rqstp, __be32 *p,
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000255 struct nfsd3_getaclres *resp)
256{
257 struct dentry *dentry = resp->fh.fh_dentry;
Prasad Paefa89d2007-10-24 15:14:32 -0500258 struct inode *inode;
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000259 struct kvec *head = rqstp->rq_res.head;
260 unsigned int base;
261 int n;
Jesper Juhlcb65a5b2006-12-08 02:39:39 -0800262 int w;
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000263
Prasad Paefa89d2007-10-24 15:14:32 -0500264 /*
265 * Since this is version 2, the check for nfserr in
266 * nfsd_dispatch actually ensures the following cannot happen.
267 * However, it seems fragile to depend on that.
268 */
David Howells2b0143b2015-03-17 22:25:59 +0000269 if (dentry == NULL || d_really_is_negative(dentry))
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000270 return 0;
David Howells2b0143b2015-03-17 22:25:59 +0000271 inode = d_inode(dentry);
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000272
J. Bruce Fields4f4a4fa2013-02-01 15:13:04 -0500273 p = nfs2svc_encode_fattr(rqstp, p, &resp->fh, &resp->stat);
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000274 *p++ = htonl(resp->mask);
275 if (!xdr_ressize_check(rqstp, p))
276 return 0;
277 base = (char *)p - (char *)head->iov_base;
278
Jesper Juhlcb65a5b2006-12-08 02:39:39 -0800279 rqstp->rq_res.page_len = w = nfsacl_size(
280 (resp->mask & NFS_ACL) ? resp->acl_access : NULL,
281 (resp->mask & NFS_DFACL) ? resp->acl_default : NULL);
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000282 while (w > 0) {
J. Bruce Fieldsafc59402012-12-10 18:01:37 -0500283 if (!*(rqstp->rq_next_page++))
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000284 return 0;
285 w -= PAGE_SIZE;
286 }
287
288 n = nfsacl_encode(&rqstp->rq_res, base, inode,
289 resp->acl_access,
290 resp->mask & NFS_ACL, 0);
291 if (n > 0)
292 n = nfsacl_encode(&rqstp->rq_res, base + n, inode,
293 resp->acl_default,
294 resp->mask & NFS_DFACL,
295 NFS_ACL_DEFAULT);
Kinglong Mee7b8f4582015-07-03 19:39:02 +0800296 return (n > 0);
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000297}
298
Al Viro131a21c2006-10-19 23:28:56 -0700299static int nfsaclsvc_encode_attrstatres(struct svc_rqst *rqstp, __be32 *p,
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000300 struct nfsd_attrstat *resp)
301{
J. Bruce Fields4f4a4fa2013-02-01 15:13:04 -0500302 p = nfs2svc_encode_fattr(rqstp, p, &resp->fh, &resp->stat);
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000303 return xdr_ressize_check(rqstp, p);
304}
305
306/* ACCESS */
Al Viro131a21c2006-10-19 23:28:56 -0700307static int nfsaclsvc_encode_accessres(struct svc_rqst *rqstp, __be32 *p,
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000308 struct nfsd3_accessres *resp)
309{
J. Bruce Fields4f4a4fa2013-02-01 15:13:04 -0500310 p = nfs2svc_encode_fattr(rqstp, p, &resp->fh, &resp->stat);
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000311 *p++ = htonl(resp->access);
312 return xdr_ressize_check(rqstp, p);
313}
314
315/*
316 * XDR release functions
317 */
Al Viro131a21c2006-10-19 23:28:56 -0700318static int nfsaclsvc_release_getacl(struct svc_rqst *rqstp, __be32 *p,
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000319 struct nfsd3_getaclres *resp)
320{
321 fh_put(&resp->fh);
322 posix_acl_release(resp->acl_access);
323 posix_acl_release(resp->acl_default);
324 return 1;
325}
326
Greg Banksc9ce2282007-02-20 10:12:34 +1100327static int nfsaclsvc_release_attrstat(struct svc_rqst *rqstp, __be32 *p,
328 struct nfsd_attrstat *resp)
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000329{
330 fh_put(&resp->fh);
331 return 1;
332}
333
Greg Banksc9ce2282007-02-20 10:12:34 +1100334static int nfsaclsvc_release_access(struct svc_rqst *rqstp, __be32 *p,
335 struct nfsd3_accessres *resp)
336{
337 fh_put(&resp->fh);
338 return 1;
339}
340
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000341#define nfsaclsvc_decode_voidargs NULL
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000342#define nfsaclsvc_release_void NULL
343#define nfsd3_fhandleargs nfsd_fhandle
344#define nfsd3_attrstatres nfsd_attrstat
345#define nfsd3_voidres nfsd3_voidargs
346struct nfsd3_voidargs { int dummy; };
347
348#define PROC(name, argt, rest, relt, cache, respsize) \
349 { (svc_procfunc) nfsacld_proc_##name, \
350 (kxdrproc_t) nfsaclsvc_decode_##argt##args, \
351 (kxdrproc_t) nfsaclsvc_encode_##rest##res, \
352 (kxdrproc_t) nfsaclsvc_release_##relt, \
353 sizeof(struct nfsd3_##argt##args), \
354 sizeof(struct nfsd3_##rest##res), \
355 0, \
356 cache, \
357 respsize, \
358 }
359
360#define ST 1 /* status*/
361#define AT 21 /* attributes */
362#define pAT (1+AT) /* post attributes - conditional */
363#define ACL (1+NFS_ACL_MAX_ENTRIES*3) /* Access Control List */
364
365static struct svc_procedure nfsd_acl_procedures2[] = {
366 PROC(null, void, void, void, RC_NOCACHE, ST),
367 PROC(getacl, getacl, getacl, getacl, RC_NOCACHE, ST+1+2*(1+ACL)),
Greg Banksc9ce2282007-02-20 10:12:34 +1100368 PROC(setacl, setacl, attrstat, attrstat, RC_NOCACHE, ST+AT),
369 PROC(getattr, fhandle, attrstat, attrstat, RC_NOCACHE, ST+AT),
370 PROC(access, access, access, access, RC_NOCACHE, ST+AT+1),
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000371};
372
373struct svc_version nfsd_acl_version2 = {
374 .vs_vers = 2,
375 .vs_nproc = 5,
376 .vs_proc = nfsd_acl_procedures2,
377 .vs_dispatch = nfsd_dispatch,
378 .vs_xdrsize = NFS3_SVC_XDRSIZE,
Peter Staubach1b7e0402009-11-02 16:59:07 -0500379 .vs_hidden = 0,
Andreas Gruenbachera257cdd2005-06-22 17:16:26 +0000380};