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authorAndreas Gruenbacher <agruen@suse.de>2005-06-22 13:16:26 -0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2005-06-22 16:07:23 -0400
commita257cdd0e2179630d3201c32ba14d7fcb3c3a055 (patch)
treeaccf4139050690a65f3f2600355cbcd1a602663b /fs
parent9ba02638e4be28dd4ff724202a640264427c62d1 (diff)
[PATCH] NFSD: Add server support for NFSv3 ACLs.
This adds functions for encoding and decoding POSIX ACLs for the NFSACL protocol extension, and the GETACL and SETACL RPCs. The implementation is compatible with NFSACL in Solaris. Signed-off-by: Andreas Gruenbacher <agruen@suse.de> Acked-by: Olaf Kirch <okir@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/Kconfig24
-rw-r--r--fs/Makefile1
-rw-r--r--fs/nfs_common/Makefile7
-rw-r--r--fs/nfs_common/nfsacl.c257
-rw-r--r--fs/nfsd/Makefile2
-rw-r--r--fs/nfsd/nfs2acl.c336
-rw-r--r--fs/nfsd/nfs3acl.c267
-rw-r--r--fs/nfsd/nfs3xdr.c13
-rw-r--r--fs/nfsd/nfssvc.c27
-rw-r--r--fs/nfsd/nfsxdr.c11
-rw-r--r--fs/nfsd/vfs.c107
11 files changed, 1051 insertions, 1 deletions
diff --git a/fs/Kconfig b/fs/Kconfig
index 178e27494b74..d44b04d9b0a9 100644
--- a/fs/Kconfig
+++ b/fs/Kconfig
@@ -1353,6 +1353,7 @@ config NFSD
1353 select LOCKD 1353 select LOCKD
1354 select SUNRPC 1354 select SUNRPC
1355 select EXPORTFS 1355 select EXPORTFS
1356 select NFS_ACL_SUPPORT if NFSD_V3_ACL || NFSD_V2_ACL
1356 help 1357 help
1357 If you want your Linux box to act as an NFS *server*, so that other 1358 If you want your Linux box to act as an NFS *server*, so that other
1358 computers on your local network which support NFS can access certain 1359 computers on your local network which support NFS can access certain
@@ -1376,6 +1377,10 @@ config NFSD
1376 To compile the NFS server support as a module, choose M here: the 1377 To compile the NFS server support as a module, choose M here: the
1377 module will be called nfsd. If unsure, say N. 1378 module will be called nfsd. If unsure, say N.
1378 1379
1380config NFSD_V2_ACL
1381 bool
1382 depends on NFSD
1383
1379config NFSD_V3 1384config NFSD_V3
1380 bool "Provide NFSv3 server support" 1385 bool "Provide NFSv3 server support"
1381 depends on NFSD 1386 depends on NFSD
@@ -1383,6 +1388,16 @@ config NFSD_V3
1383 If you would like to include the NFSv3 server as well as the NFSv2 1388 If you would like to include the NFSv3 server as well as the NFSv2
1384 server, say Y here. If unsure, say Y. 1389 server, say Y here. If unsure, say Y.
1385 1390
1391config NFSD_V3_ACL
1392 bool "Provide server support for the NFSv3 ACL protocol extension"
1393 depends on NFSD_V3
1394 select NFSD_V2_ACL
1395 help
1396 Implement the NFSv3 ACL protocol extension for manipulating POSIX
1397 Access Control Lists on exported file systems. NFS clients should
1398 be compiled with the NFSv3 ACL protocol extension; see the
1399 CONFIG_NFS_V3_ACL option. If unsure, say N.
1400
1386config NFSD_V4 1401config NFSD_V4
1387 bool "Provide NFSv4 server support (EXPERIMENTAL)" 1402 bool "Provide NFSv4 server support (EXPERIMENTAL)"
1388 depends on NFSD_V3 && EXPERIMENTAL 1403 depends on NFSD_V3 && EXPERIMENTAL
@@ -1427,6 +1442,15 @@ config LOCKD_V4
1427config EXPORTFS 1442config EXPORTFS
1428 tristate 1443 tristate
1429 1444
1445config NFS_ACL_SUPPORT
1446 tristate
1447 select FS_POSIX_ACL
1448
1449config NFS_COMMON
1450 bool
1451 depends on NFSD || NFS_FS
1452 default y
1453
1430config SUNRPC 1454config SUNRPC
1431 tristate 1455 tristate
1432 1456
diff --git a/fs/Makefile b/fs/Makefile
index 443f2bc56ccf..fc92e59e9faf 100644
--- a/fs/Makefile
+++ b/fs/Makefile
@@ -31,6 +31,7 @@ obj-$(CONFIG_BINFMT_FLAT) += binfmt_flat.o
31 31
32obj-$(CONFIG_FS_MBCACHE) += mbcache.o 32obj-$(CONFIG_FS_MBCACHE) += mbcache.o
33obj-$(CONFIG_FS_POSIX_ACL) += posix_acl.o xattr_acl.o 33obj-$(CONFIG_FS_POSIX_ACL) += posix_acl.o xattr_acl.o
34obj-$(CONFIG_NFS_COMMON) += nfs_common/
34 35
35obj-$(CONFIG_QUOTA) += dquot.o 36obj-$(CONFIG_QUOTA) += dquot.o
36obj-$(CONFIG_QFMT_V1) += quota_v1.o 37obj-$(CONFIG_QFMT_V1) += quota_v1.o
diff --git a/fs/nfs_common/Makefile b/fs/nfs_common/Makefile
new file mode 100644
index 000000000000..f689ed82af3a
--- /dev/null
+++ b/fs/nfs_common/Makefile
@@ -0,0 +1,7 @@
1#
2# Makefile for Linux filesystem routines that are shared by client and server.
3#
4
5obj-$(CONFIG_NFS_ACL_SUPPORT) += nfs_acl.o
6
7nfs_acl-objs := nfsacl.o
diff --git a/fs/nfs_common/nfsacl.c b/fs/nfs_common/nfsacl.c
new file mode 100644
index 000000000000..18c58c32e326
--- /dev/null
+++ b/fs/nfs_common/nfsacl.c
@@ -0,0 +1,257 @@
1/*
2 * fs/nfs_common/nfsacl.c
3 *
4 * Copyright (C) 2002-2003 Andreas Gruenbacher <agruen@suse.de>
5 */
6
7/*
8 * The Solaris nfsacl protocol represents some ACLs slightly differently
9 * than POSIX 1003.1e draft 17 does (and we do):
10 *
11 * - Minimal ACLs always have an ACL_MASK entry, so they have
12 * four instead of three entries.
13 * - The ACL_MASK entry in such minimal ACLs always has the same
14 * permissions as the ACL_GROUP_OBJ entry. (In extended ACLs
15 * the ACL_MASK and ACL_GROUP_OBJ entries may differ.)
16 * - The identifier fields of the ACL_USER_OBJ and ACL_GROUP_OBJ
17 * entries contain the identifiers of the owner and owning group.
18 * (In POSIX ACLs we always set them to ACL_UNDEFINED_ID).
19 * - ACL entries in the kernel are kept sorted in ascending order
20 * of (e_tag, e_id). Solaris ACLs are unsorted.
21 */
22
23#include <linux/module.h>
24#include <linux/fs.h>
25#include <linux/sunrpc/xdr.h>
26#include <linux/nfsacl.h>
27#include <linux/nfs3.h>
28#include <linux/sort.h>
29
30MODULE_LICENSE("GPL");
31
32EXPORT_SYMBOL(nfsacl_encode);
33EXPORT_SYMBOL(nfsacl_decode);
34
35struct nfsacl_encode_desc {
36 struct xdr_array2_desc desc;
37 unsigned int count;
38 struct posix_acl *acl;
39 int typeflag;
40 uid_t uid;
41 gid_t gid;
42};
43
44static int
45xdr_nfsace_encode(struct xdr_array2_desc *desc, void *elem)
46{
47 struct nfsacl_encode_desc *nfsacl_desc =
48 (struct nfsacl_encode_desc *) desc;
49 u32 *p = (u32 *) elem;
50
51 if (nfsacl_desc->count < nfsacl_desc->acl->a_count) {
52 struct posix_acl_entry *entry =
53 &nfsacl_desc->acl->a_entries[nfsacl_desc->count++];
54
55 *p++ = htonl(entry->e_tag | nfsacl_desc->typeflag);
56 switch(entry->e_tag) {
57 case ACL_USER_OBJ:
58 *p++ = htonl(nfsacl_desc->uid);
59 break;
60 case ACL_GROUP_OBJ:
61 *p++ = htonl(nfsacl_desc->gid);
62 break;
63 case ACL_USER:
64 case ACL_GROUP:
65 *p++ = htonl(entry->e_id);
66 break;
67 default: /* Solaris depends on that! */
68 *p++ = 0;
69 break;
70 }
71 *p++ = htonl(entry->e_perm & S_IRWXO);
72 } else {
73 const struct posix_acl_entry *pa, *pe;
74 int group_obj_perm = ACL_READ|ACL_WRITE|ACL_EXECUTE;
75
76 FOREACH_ACL_ENTRY(pa, nfsacl_desc->acl, pe) {
77 if (pa->e_tag == ACL_GROUP_OBJ) {
78 group_obj_perm = pa->e_perm & S_IRWXO;
79 break;
80 }
81 }
82 /* fake up ACL_MASK entry */
83 *p++ = htonl(ACL_MASK | nfsacl_desc->typeflag);
84 *p++ = htonl(0);
85 *p++ = htonl(group_obj_perm);
86 }
87
88 return 0;
89}
90
91unsigned int
92nfsacl_encode(struct xdr_buf *buf, unsigned int base, struct inode *inode,
93 struct posix_acl *acl, int encode_entries, int typeflag)
94{
95 int entries = (acl && acl->a_count) ? max_t(int, acl->a_count, 4) : 0;
96 struct nfsacl_encode_desc nfsacl_desc = {
97 .desc = {
98 .elem_size = 12,
99 .array_len = encode_entries ? entries : 0,
100 .xcode = xdr_nfsace_encode,
101 },
102 .acl = acl,
103 .typeflag = typeflag,
104 .uid = inode->i_uid,
105 .gid = inode->i_gid,
106 };
107 int err;
108
109 if (entries > NFS_ACL_MAX_ENTRIES ||
110 xdr_encode_word(buf, base, entries))
111 return -EINVAL;
112 err = xdr_encode_array2(buf, base + 4, &nfsacl_desc.desc);
113 if (!err)
114 err = 8 + nfsacl_desc.desc.elem_size *
115 nfsacl_desc.desc.array_len;
116 return err;
117}
118
119struct nfsacl_decode_desc {
120 struct xdr_array2_desc desc;
121 unsigned int count;
122 struct posix_acl *acl;
123};
124
125static int
126xdr_nfsace_decode(struct xdr_array2_desc *desc, void *elem)
127{
128 struct nfsacl_decode_desc *nfsacl_desc =
129 (struct nfsacl_decode_desc *) desc;
130 u32 *p = (u32 *) elem;
131 struct posix_acl_entry *entry;
132
133 if (!nfsacl_desc->acl) {
134 if (desc->array_len > NFS_ACL_MAX_ENTRIES)
135 return -EINVAL;
136 nfsacl_desc->acl = posix_acl_alloc(desc->array_len, GFP_KERNEL);
137 if (!nfsacl_desc->acl)
138 return -ENOMEM;
139 nfsacl_desc->count = 0;
140 }
141
142 entry = &nfsacl_desc->acl->a_entries[nfsacl_desc->count++];
143 entry->e_tag = ntohl(*p++) & ~NFS_ACL_DEFAULT;
144 entry->e_id = ntohl(*p++);
145 entry->e_perm = ntohl(*p++);
146
147 switch(entry->e_tag) {
148 case ACL_USER_OBJ:
149 case ACL_USER:
150 case ACL_GROUP_OBJ:
151 case ACL_GROUP:
152 case ACL_OTHER:
153 if (entry->e_perm & ~S_IRWXO)
154 return -EINVAL;
155 break;
156 case ACL_MASK:
157 /* Solaris sometimes sets additonal bits in the mask */
158 entry->e_perm &= S_IRWXO;
159 break;
160 default:
161 return -EINVAL;
162 }
163
164 return 0;
165}
166
167static int
168cmp_acl_entry(const void *x, const void *y)
169{
170 const struct posix_acl_entry *a = x, *b = y;
171
172 if (a->e_tag != b->e_tag)
173 return a->e_tag - b->e_tag;
174 else if (a->e_id > b->e_id)
175 return 1;
176 else if (a->e_id < b->e_id)
177 return -1;
178 else
179 return 0;
180}
181
182/*
183 * Convert from a Solaris ACL to a POSIX 1003.1e draft 17 ACL.
184 */
185static int
186posix_acl_from_nfsacl(struct posix_acl *acl)
187{
188 struct posix_acl_entry *pa, *pe,
189 *group_obj = NULL, *mask = NULL;
190
191 if (!acl)
192 return 0;
193
194 sort(acl->a_entries, acl->a_count, sizeof(struct posix_acl_entry),
195 cmp_acl_entry, NULL);
196
197 /* Clear undefined identifier fields and find the ACL_GROUP_OBJ
198 and ACL_MASK entries. */
199 FOREACH_ACL_ENTRY(pa, acl, pe) {
200 switch(pa->e_tag) {
201 case ACL_USER_OBJ:
202 pa->e_id = ACL_UNDEFINED_ID;
203 break;
204 case ACL_GROUP_OBJ:
205 pa->e_id = ACL_UNDEFINED_ID;
206 group_obj = pa;
207 break;
208 case ACL_MASK:
209 mask = pa;
210 /* fall through */
211 case ACL_OTHER:
212 pa->e_id = ACL_UNDEFINED_ID;
213 break;
214 }
215 }
216 if (acl->a_count == 4 && group_obj && mask &&
217 mask->e_perm == group_obj->e_perm) {
218 /* remove bogus ACL_MASK entry */
219 memmove(mask, mask+1, (3 - (mask - acl->a_entries)) *
220 sizeof(struct posix_acl_entry));
221 acl->a_count = 3;
222 }
223 return 0;
224}
225
226unsigned int
227nfsacl_decode(struct xdr_buf *buf, unsigned int base, unsigned int *aclcnt,
228 struct posix_acl **pacl)
229{
230 struct nfsacl_decode_desc nfsacl_desc = {
231 .desc = {
232 .elem_size = 12,
233 .xcode = pacl ? xdr_nfsace_decode : NULL,
234 },
235 };
236 u32 entries;
237 int err;
238
239 if (xdr_decode_word(buf, base, &entries) ||
240 entries > NFS_ACL_MAX_ENTRIES)
241 return -EINVAL;
242 err = xdr_decode_array2(buf, base + 4, &nfsacl_desc.desc);
243 if (err)
244 return err;
245 if (pacl) {
246 if (entries != nfsacl_desc.desc.array_len ||
247 posix_acl_from_nfsacl(nfsacl_desc.acl) != 0) {
248 posix_acl_release(nfsacl_desc.acl);
249 return -EINVAL;
250 }
251 *pacl = nfsacl_desc.acl;
252 }
253 if (aclcnt)
254 *aclcnt = entries;
255 return 8 + nfsacl_desc.desc.elem_size *
256 nfsacl_desc.desc.array_len;
257}
diff --git a/fs/nfsd/Makefile b/fs/nfsd/Makefile
index b8680a247f8b..9f043f44c92f 100644
--- a/fs/nfsd/Makefile
+++ b/fs/nfsd/Makefile
@@ -6,7 +6,9 @@ obj-$(CONFIG_NFSD) += nfsd.o
6 6
7nfsd-y := nfssvc.o nfsctl.o nfsproc.o nfsfh.o vfs.o \ 7nfsd-y := nfssvc.o nfsctl.o nfsproc.o nfsfh.o vfs.o \
8 export.o auth.o lockd.o nfscache.o nfsxdr.o stats.o 8 export.o auth.o lockd.o nfscache.o nfsxdr.o stats.o
9nfsd-$(CONFIG_NFSD_V2_ACL) += nfs2acl.o
9nfsd-$(CONFIG_NFSD_V3) += nfs3proc.o nfs3xdr.o 10nfsd-$(CONFIG_NFSD_V3) += nfs3proc.o nfs3xdr.o
11nfsd-$(CONFIG_NFSD_V3_ACL) += nfs3acl.o
10nfsd-$(CONFIG_NFSD_V4) += nfs4proc.o nfs4xdr.o nfs4state.o nfs4idmap.o \ 12nfsd-$(CONFIG_NFSD_V4) += nfs4proc.o nfs4xdr.o nfs4state.o nfs4idmap.o \
11 nfs4acl.o nfs4callback.o 13 nfs4acl.o nfs4callback.o
12nfsd-objs := $(nfsd-y) 14nfsd-objs := $(nfsd-y)
diff --git a/fs/nfsd/nfs2acl.c b/fs/nfsd/nfs2acl.c
new file mode 100644
index 000000000000..7cbf0682b2f0
--- /dev/null
+++ b/fs/nfsd/nfs2acl.c
@@ -0,0 +1,336 @@
1/*
2 * linux/fs/nfsd/nfsacl.c
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>
17
18#define NFSDDBG_FACILITY NFSDDBG_PROC
19#define RETURN_STATUS(st) { resp->status = (st); return (st); }
20
21/*
22 * NULL call.
23 */
24static int
25nfsacld_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
26{
27 return nfs_ok;
28}
29
30/*
31 * Get the Access and/or Default ACL of a file.
32 */
33static int nfsacld_proc_getacl(struct svc_rqst * rqstp,
34 struct nfsd3_getaclargs *argp, struct nfsd3_getaclres *resp)
35{
36 svc_fh *fh;
37 struct posix_acl *acl;
38 int nfserr = 0;
39
40 dprintk("nfsd: GETACL(2acl) %s\n", SVCFH_fmt(&argp->fh));
41
42 fh = fh_copy(&resp->fh, &argp->fh);
43 if ((nfserr = fh_verify(rqstp, &resp->fh, 0, MAY_NOP)))
44 RETURN_STATUS(nfserr_inval);
45
46 if (argp->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT))
47 RETURN_STATUS(nfserr_inval);
48 resp->mask = argp->mask;
49
50 if (resp->mask & (NFS_ACL|NFS_ACLCNT)) {
51 acl = nfsd_get_posix_acl(fh, ACL_TYPE_ACCESS);
52 if (IS_ERR(acl)) {
53 int err = PTR_ERR(acl);
54
55 if (err == -ENODATA || err == -EOPNOTSUPP)
56 acl = NULL;
57 else {
58 nfserr = nfserrno(err);
59 goto fail;
60 }
61 }
62 if (acl == NULL) {
63 /* Solaris returns the inode's minimum ACL. */
64
65 struct inode *inode = fh->fh_dentry->d_inode;
66 acl = posix_acl_from_mode(inode->i_mode, GFP_KERNEL);
67 }
68 resp->acl_access = acl;
69 }
70 if (resp->mask & (NFS_DFACL|NFS_DFACLCNT)) {
71 /* Check how Solaris handles requests for the Default ACL
72 of a non-directory! */
73
74 acl = nfsd_get_posix_acl(fh, ACL_TYPE_DEFAULT);
75 if (IS_ERR(acl)) {
76 int err = PTR_ERR(acl);
77
78 if (err == -ENODATA || err == -EOPNOTSUPP)
79 acl = NULL;
80 else {
81 nfserr = nfserrno(err);
82 goto fail;
83 }
84 }
85 resp->acl_default = acl;
86 }
87
88 /* resp->acl_{access,default} are released in nfssvc_release_getacl. */
89 RETURN_STATUS(0);
90
91fail:
92 posix_acl_release(resp->acl_access);
93 posix_acl_release(resp->acl_default);
94 RETURN_STATUS(nfserr);
95}
96
97/*
98 * Set the Access and/or Default ACL of a file.
99 */
100static int nfsacld_proc_setacl(struct svc_rqst * rqstp,
101 struct nfsd3_setaclargs *argp,
102 struct nfsd_attrstat *resp)
103{
104 svc_fh *fh;
105 int nfserr = 0;
106
107 dprintk("nfsd: SETACL(2acl) %s\n", SVCFH_fmt(&argp->fh));
108
109 fh = fh_copy(&resp->fh, &argp->fh);
110 nfserr = fh_verify(rqstp, &resp->fh, 0, MAY_NOP);
111
112 if (!nfserr) {
113 nfserr = nfserrno( nfsd_set_posix_acl(
114 fh, ACL_TYPE_ACCESS, argp->acl_access) );
115 }
116 if (!nfserr) {
117 nfserr = nfserrno( nfsd_set_posix_acl(
118 fh, ACL_TYPE_DEFAULT, argp->acl_default) );
119 }
120
121 /* argp->acl_{access,default} may have been allocated in
122 nfssvc_decode_setaclargs. */
123 posix_acl_release(argp->acl_access);
124 posix_acl_release(argp->acl_default);
125 return nfserr;
126}
127
128/*
129 * Check file attributes
130 */
131static int nfsacld_proc_getattr(struct svc_rqst * rqstp,
132 struct nfsd_fhandle *argp, struct nfsd_attrstat *resp)
133{
134 dprintk("nfsd: GETATTR %s\n", SVCFH_fmt(&argp->fh));
135
136 fh_copy(&resp->fh, &argp->fh);
137 return fh_verify(rqstp, &resp->fh, 0, MAY_NOP);
138}
139
140/*
141 * Check file access
142 */
143static int nfsacld_proc_access(struct svc_rqst *rqstp, struct nfsd3_accessargs *argp,
144 struct nfsd3_accessres *resp)
145{
146 int nfserr;
147
148 dprintk("nfsd: ACCESS(2acl) %s 0x%x\n",
149 SVCFH_fmt(&argp->fh),
150 argp->access);
151
152 fh_copy(&resp->fh, &argp->fh);
153 resp->access = argp->access;
154 nfserr = nfsd_access(rqstp, &resp->fh, &resp->access, NULL);
155 return nfserr;
156}
157
158/*
159 * XDR decode functions
160 */
161static int nfsaclsvc_decode_getaclargs(struct svc_rqst *rqstp, u32 *p,
162 struct nfsd3_getaclargs *argp)
163{
164 if (!(p = nfs2svc_decode_fh(p, &argp->fh)))
165 return 0;
166 argp->mask = ntohl(*p); p++;
167
168 return xdr_argsize_check(rqstp, p);
169}
170
171
172static int nfsaclsvc_decode_setaclargs(struct svc_rqst *rqstp, u32 *p,
173 struct nfsd3_setaclargs *argp)
174{
175 struct kvec *head = rqstp->rq_arg.head;
176 unsigned int base;
177 int n;
178
179 if (!(p = nfs2svc_decode_fh(p, &argp->fh)))
180 return 0;
181 argp->mask = ntohl(*p++);
182 if (argp->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT) ||
183 !xdr_argsize_check(rqstp, p))
184 return 0;
185
186 base = (char *)p - (char *)head->iov_base;
187 n = nfsacl_decode(&rqstp->rq_arg, base, NULL,
188 (argp->mask & NFS_ACL) ?
189 &argp->acl_access : NULL);
190 if (n > 0)
191 n = nfsacl_decode(&rqstp->rq_arg, base + n, NULL,
192 (argp->mask & NFS_DFACL) ?
193 &argp->acl_default : NULL);
194 return (n > 0);
195}
196
197static int nfsaclsvc_decode_fhandleargs(struct svc_rqst *rqstp, u32 *p,
198 struct nfsd_fhandle *argp)
199{
200 if (!(p = nfs2svc_decode_fh(p, &argp->fh)))
201 return 0;
202 return xdr_argsize_check(rqstp, p);
203}
204
205static int nfsaclsvc_decode_accessargs(struct svc_rqst *rqstp, u32 *p,
206 struct nfsd3_accessargs *argp)
207{
208 if (!(p = nfs2svc_decode_fh(p, &argp->fh)))
209 return 0;
210 argp->access = ntohl(*p++);
211
212 return xdr_argsize_check(rqstp, p);
213}
214
215/*
216 * XDR encode functions
217 */
218
219/* GETACL */
220static int nfsaclsvc_encode_getaclres(struct svc_rqst *rqstp, u32 *p,
221 struct nfsd3_getaclres *resp)
222{
223 struct dentry *dentry = resp->fh.fh_dentry;
224 struct inode *inode = dentry->d_inode;
225 int w = nfsacl_size(
226 (resp->mask & NFS_ACL) ? resp->acl_access : NULL,
227 (resp->mask & NFS_DFACL) ? resp->acl_default : NULL);
228 struct kvec *head = rqstp->rq_res.head;
229 unsigned int base;
230 int n;
231
232 if (dentry == NULL || dentry->d_inode == NULL)
233 return 0;
234 inode = dentry->d_inode;
235
236 p = nfs2svc_encode_fattr(rqstp, p, &resp->fh);
237 *p++ = htonl(resp->mask);
238 if (!xdr_ressize_check(rqstp, p))
239 return 0;
240 base = (char *)p - (char *)head->iov_base;
241
242 rqstp->rq_res.page_len = w;
243 while (w > 0) {
244 if (!svc_take_res_page(rqstp))
245 return 0;
246 w -= PAGE_SIZE;
247 }
248
249 n = nfsacl_encode(&rqstp->rq_res, base, inode,
250 resp->acl_access,
251 resp->mask & NFS_ACL, 0);
252 if (n > 0)
253 n = nfsacl_encode(&rqstp->rq_res, base + n, inode,
254 resp->acl_default,
255 resp->mask & NFS_DFACL,
256 NFS_ACL_DEFAULT);
257 if (n <= 0)
258 return 0;
259 return 1;
260}
261
262static int nfsaclsvc_encode_attrstatres(struct svc_rqst *rqstp, u32 *p,
263 struct nfsd_attrstat *resp)
264{
265 p = nfs2svc_encode_fattr(rqstp, p, &resp->fh);
266 return xdr_ressize_check(rqstp, p);
267}
268
269/* ACCESS */
270static int nfsaclsvc_encode_accessres(struct svc_rqst *rqstp, u32 *p,
271 struct nfsd3_accessres *resp)
272{
273 p = nfs2svc_encode_fattr(rqstp, p, &resp->fh);
274 *p++ = htonl(resp->access);
275 return xdr_ressize_check(rqstp, p);
276}
277
278/*
279 * XDR release functions
280 */
281static int nfsaclsvc_release_getacl(struct svc_rqst *rqstp, u32 *p,
282 struct nfsd3_getaclres *resp)
283{
284 fh_put(&resp->fh);
285 posix_acl_release(resp->acl_access);
286 posix_acl_release(resp->acl_default);
287 return 1;
288}
289
290static int nfsaclsvc_release_fhandle(struct svc_rqst *rqstp, u32 *p,
291 struct nfsd_fhandle *resp)
292{
293 fh_put(&resp->fh);
294 return 1;
295}
296
297#define nfsaclsvc_decode_voidargs NULL
298#define nfsaclsvc_encode_voidres NULL
299#define nfsaclsvc_release_void NULL
300#define nfsd3_fhandleargs nfsd_fhandle
301#define nfsd3_attrstatres nfsd_attrstat
302#define nfsd3_voidres nfsd3_voidargs
303struct nfsd3_voidargs { int dummy; };
304
305#define PROC(name, argt, rest, relt, cache, respsize) \
306 { (svc_procfunc) nfsacld_proc_##name, \
307 (kxdrproc_t) nfsaclsvc_decode_##argt##args, \
308 (kxdrproc_t) nfsaclsvc_encode_##rest##res, \
309 (kxdrproc_t) nfsaclsvc_release_##relt, \
310 sizeof(struct nfsd3_##argt##args), \
311 sizeof(struct nfsd3_##rest##res), \
312 0, \
313 cache, \
314 respsize, \
315 }
316
317#define ST 1 /* status*/
318#define AT 21 /* attributes */
319#define pAT (1+AT) /* post attributes - conditional */
320#define ACL (1+NFS_ACL_MAX_ENTRIES*3) /* Access Control List */
321
322static struct svc_procedure nfsd_acl_procedures2[] = {
323 PROC(null, void, void, void, RC_NOCACHE, ST),
324 PROC(getacl, getacl, getacl, getacl, RC_NOCACHE, ST+1+2*(1+ACL)),
325 PROC(setacl, setacl, attrstat, fhandle, RC_NOCACHE, ST+AT),
326 PROC(getattr, fhandle, attrstat, fhandle, RC_NOCACHE, ST+AT),
327 PROC(access, access, access, fhandle, RC_NOCACHE, ST+AT+1),
328};
329
330struct svc_version nfsd_acl_version2 = {
331 .vs_vers = 2,
332 .vs_nproc = 5,
333 .vs_proc = nfsd_acl_procedures2,
334 .vs_dispatch = nfsd_dispatch,
335 .vs_xdrsize = NFS3_SVC_XDRSIZE,
336};
diff --git a/fs/nfsd/nfs3acl.c b/fs/nfsd/nfs3acl.c
new file mode 100644
index 000000000000..64ba40572fea
--- /dev/null
+++ b/fs/nfsd/nfs3acl.c
@@ -0,0 +1,267 @@
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 */
22static int
23nfsd3_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 */
31static int nfsd3_proc_getacl(struct svc_rqst * rqstp,
32 struct nfsd3_getaclargs *argp, struct nfsd3_getaclres *resp)
33{
34 svc_fh *fh;
35 struct posix_acl *acl;
36 int nfserr = 0;
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
87fail:
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 */
96static int nfsd3_proc_setacl(struct svc_rqst * rqstp,
97 struct nfsd3_setaclargs *argp,
98 struct nfsd3_attrstat *resp)
99{
100 svc_fh *fh;
101 int nfserr = 0;
102
103 fh = fh_copy(&resp->fh, &argp->fh);
104 nfserr = fh_verify(rqstp, &resp->fh, 0, MAY_NOP);
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 */
125static int nfs3svc_decode_getaclargs(struct svc_rqst *rqstp, u32 *p,
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
136static int nfs3svc_decode_setaclargs(struct svc_rqst *rqstp, u32 *p,
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 */
166static int nfs3svc_encode_getaclres(struct svc_rqst *rqstp, u32 *p,
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) {
188 if (!svc_take_res_page(rqstp))
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 */
211static int nfs3svc_encode_setaclres(struct svc_rqst *rqstp, u32 *p,
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 */
222static int nfs3svc_release_getacl(struct svc_rqst *rqstp, u32 *p,
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
235struct 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
254static 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
260struct 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,
266};
267
diff --git a/fs/nfsd/nfs3xdr.c b/fs/nfsd/nfs3xdr.c
index 11f806835c5a..e0e134d6baba 100644
--- a/fs/nfsd/nfs3xdr.c
+++ b/fs/nfsd/nfs3xdr.c
@@ -71,6 +71,12 @@ decode_fh(u32 *p, struct svc_fh *fhp)
71 return p + XDR_QUADLEN(size); 71 return p + XDR_QUADLEN(size);
72} 72}
73 73
74/* Helper function for NFSv3 ACL code */
75u32 *nfs3svc_decode_fh(u32 *p, struct svc_fh *fhp)
76{
77 return decode_fh(p, fhp);
78}
79
74static inline u32 * 80static inline u32 *
75encode_fh(u32 *p, struct svc_fh *fhp) 81encode_fh(u32 *p, struct svc_fh *fhp)
76{ 82{
@@ -233,6 +239,13 @@ encode_post_op_attr(struct svc_rqst *rqstp, u32 *p, struct svc_fh *fhp)
233 return p; 239 return p;
234} 240}
235 241
242/* Helper for NFSv3 ACLs */
243u32 *
244nfs3svc_encode_post_op_attr(struct svc_rqst *rqstp, u32 *p, struct svc_fh *fhp)
245{
246 return encode_post_op_attr(rqstp, p, fhp);
247}
248
236/* 249/*
237 * Enocde weak cache consistency data 250 * Enocde weak cache consistency data
238 */ 251 */
diff --git a/fs/nfsd/nfssvc.c b/fs/nfsd/nfssvc.c
index 02ded7cfbdcf..79b25b19fec8 100644
--- a/fs/nfsd/nfssvc.c
+++ b/fs/nfsd/nfssvc.c
@@ -31,6 +31,7 @@
31#include <linux/nfsd/stats.h> 31#include <linux/nfsd/stats.h>
32#include <linux/nfsd/cache.h> 32#include <linux/nfsd/cache.h>
33#include <linux/lockd/bind.h> 33#include <linux/lockd/bind.h>
34#include <linux/nfsacl.h>
34 35
35#define NFSDDBG_FACILITY NFSDDBG_SVC 36#define NFSDDBG_FACILITY NFSDDBG_SVC
36 37
@@ -362,6 +363,31 @@ nfsd_dispatch(struct svc_rqst *rqstp, u32 *statp)
362 return 1; 363 return 1;
363} 364}
364 365
366#if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
367static struct svc_stat nfsd_acl_svcstats;
368static struct svc_version * nfsd_acl_version[] = {
369 [2] = &nfsd_acl_version2,
370 [3] = &nfsd_acl_version3,
371};
372
373#define NFSD_ACL_NRVERS (sizeof(nfsd_acl_version)/sizeof(nfsd_acl_version[0]))
374static struct svc_program nfsd_acl_program = {
375 .pg_prog = NFS_ACL_PROGRAM,
376 .pg_nvers = NFSD_ACL_NRVERS,
377 .pg_vers = nfsd_acl_version,
378 .pg_name = "nfsd",
379 .pg_stats = &nfsd_acl_svcstats,
380};
381
382static struct svc_stat nfsd_acl_svcstats = {
383 .program = &nfsd_acl_program,
384};
385
386#define nfsd_acl_program_p &nfsd_acl_program
387#else
388#define nfsd_acl_program_p NULL
389#endif /* defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL) */
390
365extern struct svc_version nfsd_version2, nfsd_version3, nfsd_version4; 391extern struct svc_version nfsd_version2, nfsd_version3, nfsd_version4;
366 392
367static struct svc_version * nfsd_version[] = { 393static struct svc_version * nfsd_version[] = {
@@ -376,6 +402,7 @@ static struct svc_version * nfsd_version[] = {
376 402
377#define NFSD_NRVERS (sizeof(nfsd_version)/sizeof(nfsd_version[0])) 403#define NFSD_NRVERS (sizeof(nfsd_version)/sizeof(nfsd_version[0]))
378struct svc_program nfsd_program = { 404struct svc_program nfsd_program = {
405 .pg_next = nfsd_acl_program_p,
379 .pg_prog = NFS_PROGRAM, /* program number */ 406 .pg_prog = NFS_PROGRAM, /* program number */
380 .pg_nvers = NFSD_NRVERS, /* nr of entries in nfsd_version */ 407 .pg_nvers = NFSD_NRVERS, /* nr of entries in nfsd_version */
381 .pg_vers = nfsd_version, /* version table */ 408 .pg_vers = nfsd_version, /* version table */
diff --git a/fs/nfsd/nfsxdr.c b/fs/nfsd/nfsxdr.c
index 948b08287c99..b45999ff33e6 100644
--- a/fs/nfsd/nfsxdr.c
+++ b/fs/nfsd/nfsxdr.c
@@ -49,6 +49,12 @@ decode_fh(u32 *p, struct svc_fh *fhp)
49 return p + (NFS_FHSIZE >> 2); 49 return p + (NFS_FHSIZE >> 2);
50} 50}
51 51
52/* Helper function for NFSv2 ACL code */
53u32 *nfs2svc_decode_fh(u32 *p, struct svc_fh *fhp)
54{
55 return decode_fh(p, fhp);
56}
57
52static inline u32 * 58static inline u32 *
53encode_fh(u32 *p, struct svc_fh *fhp) 59encode_fh(u32 *p, struct svc_fh *fhp)
54{ 60{
@@ -190,6 +196,11 @@ encode_fattr(struct svc_rqst *rqstp, u32 *p, struct svc_fh *fhp)
190 return p; 196 return p;
191} 197}
192 198
199/* Helper function for NFSv2 ACL code */
200u32 *nfs2svc_encode_fattr(struct svc_rqst *rqstp, u32 *p, struct svc_fh *fhp)
201{
202 return encode_fattr(rqstp, p, fhp);
203}
193 204
194/* 205/*
195 * XDR decode functions 206 * XDR decode functions
diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index e3e9d217236e..ae3940dc85cc 100644
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -46,8 +46,9 @@
46#include <linux/nfsd/nfsfh.h> 46#include <linux/nfsd/nfsfh.h>
47#include <linux/quotaops.h> 47#include <linux/quotaops.h>
48#include <linux/dnotify.h> 48#include <linux/dnotify.h>
49#ifdef CONFIG_NFSD_V4 49#include <linux/xattr_acl.h>
50#include <linux/posix_acl.h> 50#include <linux/posix_acl.h>
51#ifdef CONFIG_NFSD_V4
51#include <linux/posix_acl_xattr.h> 52#include <linux/posix_acl_xattr.h>
52#include <linux/xattr_acl.h> 53#include <linux/xattr_acl.h>
53#include <linux/xattr.h> 54#include <linux/xattr.h>
@@ -1857,3 +1858,107 @@ nfsd_racache_init(int cache_size)
1857 nfsdstats.ra_size = cache_size; 1858 nfsdstats.ra_size = cache_size;
1858 return 0; 1859 return 0;
1859} 1860}
1861
1862#if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
1863struct posix_acl *
1864nfsd_get_posix_acl(struct svc_fh *fhp, int type)
1865{
1866 struct inode *inode = fhp->fh_dentry->d_inode;
1867 char *name;
1868 void *value = NULL;
1869 ssize_t size;
1870 struct posix_acl *acl;
1871
1872 if (!IS_POSIXACL(inode) || !inode->i_op || !inode->i_op->getxattr)
1873 return ERR_PTR(-EOPNOTSUPP);
1874 switch(type) {
1875 case ACL_TYPE_ACCESS:
1876 name = XATTR_NAME_ACL_ACCESS;
1877 break;
1878 case ACL_TYPE_DEFAULT:
1879 name = XATTR_NAME_ACL_DEFAULT;
1880 break;
1881 default:
1882 return ERR_PTR(-EOPNOTSUPP);
1883 }
1884
1885 size = inode->i_op->getxattr(fhp->fh_dentry, name, NULL, 0);
1886
1887 if (size < 0) {
1888 acl = ERR_PTR(size);
1889 goto getout;
1890 } else if (size > 0) {
1891 value = kmalloc(size, GFP_KERNEL);
1892 if (!value) {
1893 acl = ERR_PTR(-ENOMEM);
1894 goto getout;
1895 }
1896 size = inode->i_op->getxattr(fhp->fh_dentry, name, value, size);
1897 if (size < 0) {
1898 acl = ERR_PTR(size);
1899 goto getout;
1900 }
1901 }
1902 acl = posix_acl_from_xattr(value, size);
1903
1904getout:
1905 kfree(value);
1906 return acl;
1907}
1908
1909int
1910nfsd_set_posix_acl(struct svc_fh *fhp, int type, struct posix_acl *acl)
1911{
1912 struct inode *inode = fhp->fh_dentry->d_inode;
1913 char *name;
1914 void *value = NULL;
1915 size_t size;
1916 int error;
1917
1918 if (!IS_POSIXACL(inode) || !inode->i_op ||
1919 !inode->i_op->setxattr || !inode->i_op->removexattr)
1920 return -EOPNOTSUPP;
1921 switch(type) {
1922 case ACL_TYPE_ACCESS:
1923 name = XATTR_NAME_ACL_ACCESS;
1924 break;
1925 case ACL_TYPE_DEFAULT:
1926 name = XATTR_NAME_ACL_DEFAULT;
1927 break;
1928 default:
1929 return -EOPNOTSUPP;
1930 }
1931
1932 if (acl && acl->a_count) {
1933 size = xattr_acl_size(acl->a_count);
1934 value = kmalloc(size, GFP_KERNEL);
1935 if (!value)
1936 return -ENOMEM;
1937 size = posix_acl_to_xattr(acl, value, size);
1938 if (size < 0) {
1939 error = size;
1940 goto getout;
1941 }
1942 } else
1943 size = 0;
1944
1945 if (!fhp->fh_locked)
1946 fh_lock(fhp); /* unlocking is done automatically */
1947 if (size)
1948 error = inode->i_op->setxattr(fhp->fh_dentry, name,
1949 value, size, 0);
1950 else {
1951 if (!S_ISDIR(inode->i_mode) && type == ACL_TYPE_DEFAULT)
1952 error = 0;
1953 else {
1954 error = inode->i_op->removexattr(fhp->fh_dentry, name);
1955 if (error == -ENODATA)
1956 error = 0;
1957 }
1958 }
1959
1960getout:
1961 kfree(value);
1962 return error;
1963}
1964#endif /* defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL) */
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-17 03:44:51 -0500