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Commit | Line | Data |
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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
a257cdd0 | 2 | /* |
a257cdd0 AG |
3 | * Process version 2 NFSACL requests. |
4 | * | |
5 | * Copyright (C) 2002-2003 Andreas Gruenbacher <agruen@suse.de> | |
6 | */ | |
7 | ||
9a74af21 BH |
8 | #include "nfsd.h" |
9 | /* FIXME: nfsacl.h is a broken header */ | |
a257cdd0 | 10 | #include <linux/nfsacl.h> |
5a0e3ad6 | 11 | #include <linux/gfp.h> |
9a74af21 BH |
12 | #include "cache.h" |
13 | #include "xdr3.h" | |
0a3adade | 14 | #include "vfs.h" |
a257cdd0 AG |
15 | |
16 | #define NFSDDBG_FACILITY NFSDDBG_PROC | |
a257cdd0 AG |
17 | |
18 | /* | |
19 | * NULL call. | |
20 | */ | |
7111c66e | 21 | static __be32 |
a6beb732 | 22 | nfsacld_proc_null(struct svc_rqst *rqstp) |
a257cdd0 | 23 | { |
cc028a10 | 24 | return rpc_success; |
a257cdd0 AG |
25 | } |
26 | ||
27 | /* | |
28 | * Get the Access and/or Default ACL of a file. | |
29 | */ | |
a6beb732 | 30 | static __be32 nfsacld_proc_getacl(struct svc_rqst *rqstp) |
a257cdd0 | 31 | { |
a6beb732 CH |
32 | struct nfsd3_getaclargs *argp = rqstp->rq_argp; |
33 | struct nfsd3_getaclres *resp = rqstp->rq_resp; | |
a257cdd0 | 34 | struct posix_acl *acl; |
4ac7249e CH |
35 | struct inode *inode; |
36 | svc_fh *fh; | |
a257cdd0 AG |
37 | |
38 | dprintk("nfsd: GETACL(2acl) %s\n", SVCFH_fmt(&argp->fh)); | |
39 | ||
40 | fh = fh_copy(&resp->fh, &argp->fh); | |
f0af2210 CL |
41 | resp->status = fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_NOP); |
42 | if (resp->status != nfs_ok) | |
43 | goto out; | |
a257cdd0 | 44 | |
2b0143b5 | 45 | inode = d_inode(fh->fh_dentry); |
4ac7249e | 46 | |
f0af2210 CL |
47 | if (argp->mask & ~NFS_ACL_MASK) { |
48 | resp->status = nfserr_inval; | |
49 | goto out; | |
50 | } | |
a257cdd0 AG |
51 | resp->mask = argp->mask; |
52 | ||
f0af2210 CL |
53 | resp->status = fh_getattr(fh, &resp->stat); |
54 | if (resp->status != nfs_ok) | |
55 | goto out; | |
4f4a4fad | 56 | |
a257cdd0 | 57 | if (resp->mask & (NFS_ACL|NFS_ACLCNT)) { |
4ac7249e | 58 | acl = get_acl(inode, ACL_TYPE_ACCESS); |
a257cdd0 AG |
59 | if (acl == NULL) { |
60 | /* Solaris returns the inode's minimum ACL. */ | |
a257cdd0 AG |
61 | acl = posix_acl_from_mode(inode->i_mode, GFP_KERNEL); |
62 | } | |
35e634b8 | 63 | if (IS_ERR(acl)) { |
f0af2210 | 64 | resp->status = nfserrno(PTR_ERR(acl)); |
35e634b8 KM |
65 | goto fail; |
66 | } | |
a257cdd0 AG |
67 | resp->acl_access = acl; |
68 | } | |
69 | if (resp->mask & (NFS_DFACL|NFS_DFACLCNT)) { | |
70 | /* Check how Solaris handles requests for the Default ACL | |
71 | of a non-directory! */ | |
4ac7249e | 72 | acl = get_acl(inode, ACL_TYPE_DEFAULT); |
a257cdd0 | 73 | if (IS_ERR(acl)) { |
f0af2210 | 74 | resp->status = nfserrno(PTR_ERR(acl)); |
4ac7249e | 75 | goto fail; |
a257cdd0 AG |
76 | } |
77 | resp->acl_default = acl; | |
78 | } | |
79 | ||
80 | /* resp->acl_{access,default} are released in nfssvc_release_getacl. */ | |
f0af2210 | 81 | out: |
cc028a10 | 82 | return rpc_success; |
a257cdd0 AG |
83 | |
84 | fail: | |
85 | posix_acl_release(resp->acl_access); | |
86 | posix_acl_release(resp->acl_default); | |
f0af2210 | 87 | goto out; |
a257cdd0 AG |
88 | } |
89 | ||
90 | /* | |
91 | * Set the Access and/or Default ACL of a file. | |
92 | */ | |
a6beb732 | 93 | static __be32 nfsacld_proc_setacl(struct svc_rqst *rqstp) |
a257cdd0 | 94 | { |
a6beb732 CH |
95 | struct nfsd3_setaclargs *argp = rqstp->rq_argp; |
96 | struct nfsd_attrstat *resp = rqstp->rq_resp; | |
4ac7249e | 97 | struct inode *inode; |
a257cdd0 | 98 | svc_fh *fh; |
4ac7249e | 99 | int error; |
a257cdd0 AG |
100 | |
101 | dprintk("nfsd: SETACL(2acl) %s\n", SVCFH_fmt(&argp->fh)); | |
102 | ||
103 | fh = fh_copy(&resp->fh, &argp->fh); | |
f0af2210 CL |
104 | resp->status = fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_SATTR); |
105 | if (resp->status != nfs_ok) | |
4ac7249e | 106 | goto out; |
a257cdd0 | 107 | |
2b0143b5 | 108 | inode = d_inode(fh->fh_dentry); |
a257cdd0 | 109 | |
4ac7249e CH |
110 | error = fh_want_write(fh); |
111 | if (error) | |
112 | goto out_errno; | |
113 | ||
99965378 BH |
114 | fh_lock(fh); |
115 | ||
e65ce2a5 CB |
116 | error = set_posix_acl(&init_user_ns, inode, ACL_TYPE_ACCESS, |
117 | argp->acl_access); | |
4ac7249e | 118 | if (error) |
99965378 | 119 | goto out_drop_lock; |
e65ce2a5 CB |
120 | error = set_posix_acl(&init_user_ns, inode, ACL_TYPE_DEFAULT, |
121 | argp->acl_default); | |
4ac7249e | 122 | if (error) |
99965378 BH |
123 | goto out_drop_lock; |
124 | ||
125 | fh_unlock(fh); | |
4ac7249e CH |
126 | |
127 | fh_drop_write(fh); | |
128 | ||
f0af2210 | 129 | resp->status = fh_getattr(fh, &resp->stat); |
4ac7249e CH |
130 | |
131 | out: | |
a257cdd0 AG |
132 | /* argp->acl_{access,default} may have been allocated in |
133 | nfssvc_decode_setaclargs. */ | |
134 | posix_acl_release(argp->acl_access); | |
135 | posix_acl_release(argp->acl_default); | |
cc028a10 | 136 | return rpc_success; |
f0af2210 | 137 | |
99965378 BH |
138 | out_drop_lock: |
139 | fh_unlock(fh); | |
4ac7249e CH |
140 | fh_drop_write(fh); |
141 | out_errno: | |
f0af2210 | 142 | resp->status = nfserrno(error); |
4ac7249e | 143 | goto out; |
a257cdd0 AG |
144 | } |
145 | ||
146 | /* | |
147 | * Check file attributes | |
148 | */ | |
a6beb732 | 149 | static __be32 nfsacld_proc_getattr(struct svc_rqst *rqstp) |
a257cdd0 | 150 | { |
a6beb732 CH |
151 | struct nfsd_fhandle *argp = rqstp->rq_argp; |
152 | struct nfsd_attrstat *resp = rqstp->rq_resp; | |
f0af2210 | 153 | |
a257cdd0 AG |
154 | dprintk("nfsd: GETATTR %s\n", SVCFH_fmt(&argp->fh)); |
155 | ||
156 | fh_copy(&resp->fh, &argp->fh); | |
f0af2210 CL |
157 | resp->status = fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_NOP); |
158 | if (resp->status != nfs_ok) | |
159 | goto out; | |
160 | resp->status = fh_getattr(&resp->fh, &resp->stat); | |
161 | out: | |
cc028a10 | 162 | return rpc_success; |
a257cdd0 AG |
163 | } |
164 | ||
165 | /* | |
166 | * Check file access | |
167 | */ | |
a6beb732 | 168 | static __be32 nfsacld_proc_access(struct svc_rqst *rqstp) |
a257cdd0 | 169 | { |
a6beb732 CH |
170 | struct nfsd3_accessargs *argp = rqstp->rq_argp; |
171 | struct nfsd3_accessres *resp = rqstp->rq_resp; | |
a257cdd0 AG |
172 | |
173 | dprintk("nfsd: ACCESS(2acl) %s 0x%x\n", | |
174 | SVCFH_fmt(&argp->fh), | |
175 | argp->access); | |
176 | ||
177 | fh_copy(&resp->fh, &argp->fh); | |
178 | resp->access = argp->access; | |
f0af2210 CL |
179 | resp->status = nfsd_access(rqstp, &resp->fh, &resp->access, NULL); |
180 | if (resp->status != nfs_ok) | |
181 | goto out; | |
182 | resp->status = fh_getattr(&resp->fh, &resp->stat); | |
183 | out: | |
cc028a10 | 184 | return rpc_success; |
a257cdd0 AG |
185 | } |
186 | ||
187 | /* | |
188 | * XDR decode functions | |
189 | */ | |
dcc46991 | 190 | |
026fec7e | 191 | static int nfsaclsvc_decode_getaclargs(struct svc_rqst *rqstp, __be32 *p) |
a257cdd0 | 192 | { |
635a45d3 | 193 | struct xdr_stream *xdr = &rqstp->rq_arg_stream; |
026fec7e CH |
194 | struct nfsd3_getaclargs *argp = rqstp->rq_argp; |
195 | ||
635a45d3 CL |
196 | if (!svcxdr_decode_fhandle(xdr, &argp->fh)) |
197 | return 0; | |
198 | if (xdr_stream_decode_u32(xdr, &argp->mask) < 0) | |
a257cdd0 | 199 | return 0; |
a257cdd0 | 200 | |
635a45d3 | 201 | return 1; |
a257cdd0 AG |
202 | } |
203 | ||
026fec7e | 204 | static int nfsaclsvc_decode_setaclargs(struct svc_rqst *rqstp, __be32 *p) |
a257cdd0 | 205 | { |
427eab3b | 206 | struct xdr_stream *xdr = &rqstp->rq_arg_stream; |
026fec7e | 207 | struct nfsd3_setaclargs *argp = rqstp->rq_argp; |
a257cdd0 | 208 | |
427eab3b | 209 | if (!svcxdr_decode_fhandle(xdr, &argp->fh)) |
a257cdd0 | 210 | return 0; |
427eab3b CL |
211 | if (xdr_stream_decode_u32(xdr, &argp->mask) < 0) |
212 | return 0; | |
213 | if (argp->mask & ~NFS_ACL_MASK) | |
214 | return 0; | |
215 | if (!nfs_stream_decode_acl(xdr, NULL, (argp->mask & NFS_ACL) ? | |
216 | &argp->acl_access : NULL)) | |
217 | return 0; | |
218 | if (!nfs_stream_decode_acl(xdr, NULL, (argp->mask & NFS_DFACL) ? | |
219 | &argp->acl_default : NULL)) | |
a257cdd0 AG |
220 | return 0; |
221 | ||
427eab3b | 222 | return 1; |
a257cdd0 AG |
223 | } |
224 | ||
026fec7e | 225 | static int nfsaclsvc_decode_accessargs(struct svc_rqst *rqstp, __be32 *p) |
a257cdd0 | 226 | { |
64063892 CL |
227 | struct xdr_stream *xdr = &rqstp->rq_arg_stream; |
228 | struct nfsd3_accessargs *args = rqstp->rq_argp; | |
026fec7e | 229 | |
64063892 CL |
230 | if (!svcxdr_decode_fhandle(xdr, &args->fh)) |
231 | return 0; | |
232 | if (xdr_stream_decode_u32(xdr, &args->access) < 0) | |
a257cdd0 | 233 | return 0; |
a257cdd0 | 234 | |
64063892 | 235 | return 1; |
a257cdd0 AG |
236 | } |
237 | ||
238 | /* | |
239 | * XDR encode functions | |
240 | */ | |
241 | ||
242 | /* GETACL */ | |
63f8de37 | 243 | static int nfsaclsvc_encode_getaclres(struct svc_rqst *rqstp, __be32 *p) |
a257cdd0 | 244 | { |
f8cba473 | 245 | struct xdr_stream *xdr = &rqstp->rq_res_stream; |
63f8de37 | 246 | struct nfsd3_getaclres *resp = rqstp->rq_resp; |
a257cdd0 | 247 | struct dentry *dentry = resp->fh.fh_dentry; |
aefa89d1 | 248 | struct inode *inode; |
cb65a5ba | 249 | int w; |
a257cdd0 | 250 | |
f8cba473 CL |
251 | if (!svcxdr_encode_stat(xdr, resp->status)) |
252 | return 0; | |
f0af2210 | 253 | |
2b0143b5 | 254 | if (dentry == NULL || d_really_is_negative(dentry)) |
f8cba473 | 255 | return 1; |
2b0143b5 | 256 | inode = d_inode(dentry); |
a257cdd0 | 257 | |
f8cba473 CL |
258 | if (!svcxdr_encode_fattr(rqstp, xdr, &resp->fh, &resp->stat)) |
259 | return 0; | |
260 | if (xdr_stream_encode_u32(xdr, resp->mask) < 0) | |
a257cdd0 | 261 | return 0; |
a257cdd0 | 262 | |
cb65a5ba JJ |
263 | rqstp->rq_res.page_len = w = nfsacl_size( |
264 | (resp->mask & NFS_ACL) ? resp->acl_access : NULL, | |
265 | (resp->mask & NFS_DFACL) ? resp->acl_default : NULL); | |
a257cdd0 | 266 | while (w > 0) { |
afc59400 | 267 | if (!*(rqstp->rq_next_page++)) |
f8cba473 | 268 | return 1; |
a257cdd0 AG |
269 | w -= PAGE_SIZE; |
270 | } | |
271 | ||
f8cba473 CL |
272 | if (!nfs_stream_encode_acl(xdr, inode, resp->acl_access, |
273 | resp->mask & NFS_ACL, 0)) | |
274 | return 0; | |
275 | if (!nfs_stream_encode_acl(xdr, inode, resp->acl_default, | |
276 | resp->mask & NFS_DFACL, NFS_ACL_DEFAULT)) | |
277 | return 0; | |
278 | ||
279 | return 1; | |
a257cdd0 AG |
280 | } |
281 | ||
a257cdd0 | 282 | /* ACCESS */ |
63f8de37 | 283 | static int nfsaclsvc_encode_accessres(struct svc_rqst *rqstp, __be32 *p) |
a257cdd0 | 284 | { |
07f5c296 | 285 | struct xdr_stream *xdr = &rqstp->rq_res_stream; |
63f8de37 CH |
286 | struct nfsd3_accessres *resp = rqstp->rq_resp; |
287 | ||
07f5c296 CL |
288 | if (!svcxdr_encode_stat(xdr, resp->status)) |
289 | return 0; | |
290 | switch (resp->status) { | |
291 | case nfs_ok: | |
292 | if (!svcxdr_encode_fattr(rqstp, xdr, &resp->fh, &resp->stat)) | |
293 | return 0; | |
294 | if (xdr_stream_encode_u32(xdr, resp->access) < 0) | |
295 | return 0; | |
296 | break; | |
297 | } | |
f0af2210 | 298 | |
07f5c296 | 299 | return 1; |
a257cdd0 AG |
300 | } |
301 | ||
302 | /* | |
303 | * XDR release functions | |
304 | */ | |
8537488b | 305 | static void nfsaclsvc_release_getacl(struct svc_rqst *rqstp) |
a257cdd0 | 306 | { |
8537488b CH |
307 | struct nfsd3_getaclres *resp = rqstp->rq_resp; |
308 | ||
a257cdd0 AG |
309 | fh_put(&resp->fh); |
310 | posix_acl_release(resp->acl_access); | |
311 | posix_acl_release(resp->acl_default); | |
a257cdd0 AG |
312 | } |
313 | ||
8537488b | 314 | static void nfsaclsvc_release_access(struct svc_rqst *rqstp) |
c9ce2283 | 315 | { |
8537488b CH |
316 | struct nfsd3_accessres *resp = rqstp->rq_resp; |
317 | ||
318 | fh_put(&resp->fh); | |
c9ce2283 GB |
319 | } |
320 | ||
a257cdd0 AG |
321 | struct nfsd3_voidargs { int dummy; }; |
322 | ||
a257cdd0 AG |
323 | #define ST 1 /* status*/ |
324 | #define AT 21 /* attributes */ | |
325 | #define pAT (1+AT) /* post attributes - conditional */ | |
326 | #define ACL (1+NFS_ACL_MAX_ENTRIES*3) /* Access Control List */ | |
327 | ||
ba1df797 CL |
328 | static const struct svc_procedure nfsd_acl_procedures2[5] = { |
329 | [ACLPROC2_NULL] = { | |
330 | .pc_func = nfsacld_proc_null, | |
788f7183 CL |
331 | .pc_decode = nfssvc_decode_voidarg, |
332 | .pc_encode = nfssvc_encode_voidres, | |
333 | .pc_argsize = sizeof(struct nfsd_voidargs), | |
334 | .pc_ressize = sizeof(struct nfsd_voidres), | |
ba1df797 CL |
335 | .pc_cachetype = RC_NOCACHE, |
336 | .pc_xdrressize = ST, | |
2289e87b | 337 | .pc_name = "NULL", |
ba1df797 CL |
338 | }, |
339 | [ACLPROC2_GETACL] = { | |
340 | .pc_func = nfsacld_proc_getacl, | |
341 | .pc_decode = nfsaclsvc_decode_getaclargs, | |
342 | .pc_encode = nfsaclsvc_encode_getaclres, | |
343 | .pc_release = nfsaclsvc_release_getacl, | |
344 | .pc_argsize = sizeof(struct nfsd3_getaclargs), | |
345 | .pc_ressize = sizeof(struct nfsd3_getaclres), | |
346 | .pc_cachetype = RC_NOCACHE, | |
347 | .pc_xdrressize = ST+1+2*(1+ACL), | |
2289e87b | 348 | .pc_name = "GETACL", |
ba1df797 CL |
349 | }, |
350 | [ACLPROC2_SETACL] = { | |
351 | .pc_func = nfsacld_proc_setacl, | |
352 | .pc_decode = nfsaclsvc_decode_setaclargs, | |
778f068f CL |
353 | .pc_encode = nfssvc_encode_attrstatres, |
354 | .pc_release = nfssvc_release_attrstat, | |
ba1df797 CL |
355 | .pc_argsize = sizeof(struct nfsd3_setaclargs), |
356 | .pc_ressize = sizeof(struct nfsd_attrstat), | |
357 | .pc_cachetype = RC_NOCACHE, | |
358 | .pc_xdrressize = ST+AT, | |
2289e87b | 359 | .pc_name = "SETACL", |
ba1df797 CL |
360 | }, |
361 | [ACLPROC2_GETATTR] = { | |
362 | .pc_func = nfsacld_proc_getattr, | |
571d31f3 | 363 | .pc_decode = nfssvc_decode_fhandleargs, |
8d2009a1 CL |
364 | .pc_encode = nfssvc_encode_attrstatres, |
365 | .pc_release = nfssvc_release_attrstat, | |
ba1df797 CL |
366 | .pc_argsize = sizeof(struct nfsd_fhandle), |
367 | .pc_ressize = sizeof(struct nfsd_attrstat), | |
368 | .pc_cachetype = RC_NOCACHE, | |
369 | .pc_xdrressize = ST+AT, | |
2289e87b | 370 | .pc_name = "GETATTR", |
ba1df797 CL |
371 | }, |
372 | [ACLPROC2_ACCESS] = { | |
373 | .pc_func = nfsacld_proc_access, | |
374 | .pc_decode = nfsaclsvc_decode_accessargs, | |
375 | .pc_encode = nfsaclsvc_encode_accessres, | |
376 | .pc_release = nfsaclsvc_release_access, | |
377 | .pc_argsize = sizeof(struct nfsd3_accessargs), | |
378 | .pc_ressize = sizeof(struct nfsd3_accessres), | |
379 | .pc_cachetype = RC_NOCACHE, | |
380 | .pc_xdrressize = ST+AT+1, | |
2289e87b | 381 | .pc_name = "SETATTR", |
ba1df797 | 382 | }, |
a257cdd0 AG |
383 | }; |
384 | ||
7fd38af9 | 385 | static unsigned int nfsd_acl_count2[ARRAY_SIZE(nfsd_acl_procedures2)]; |
e9679189 CH |
386 | const struct svc_version nfsd_acl_version2 = { |
387 | .vs_vers = 2, | |
388 | .vs_nproc = 5, | |
389 | .vs_proc = nfsd_acl_procedures2, | |
390 | .vs_count = nfsd_acl_count2, | |
391 | .vs_dispatch = nfsd_dispatch, | |
392 | .vs_xdrsize = NFS3_SVC_XDRSIZE, | |
a257cdd0 | 393 | }; |