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34dc7c2f BB |
1 | /* |
2 | * CDDL HEADER START | |
3 | * | |
4 | * The contents of this file are subject to the terms of the | |
5 | * Common Development and Distribution License (the "License"). | |
6 | * You may not use this file except in compliance with the License. | |
7 | * | |
8 | * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE | |
9 | * or http://www.opensolaris.org/os/licensing. | |
10 | * See the License for the specific language governing permissions | |
11 | * and limitations under the License. | |
12 | * | |
13 | * When distributing Covered Code, include this CDDL HEADER in each | |
14 | * file and include the License file at usr/src/OPENSOLARIS.LICENSE. | |
15 | * If applicable, add the following below this CDDL HEADER, with the | |
16 | * fields enclosed by brackets "[]" replaced with your own identifying | |
17 | * information: Portions Copyright [yyyy] [name of copyright owner] | |
18 | * | |
19 | * CDDL HEADER END | |
20 | */ | |
21 | /* | |
428870ff | 22 | * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved. |
34dc7c2f BB |
23 | */ |
24 | ||
34dc7c2f | 25 | #include <sys/zfs_context.h> |
34dc7c2f BB |
26 | #include <sys/dmu.h> |
27 | #include <sys/avl.h> | |
28 | #include <sys/zap.h> | |
29 | #include <sys/refcount.h> | |
30 | #include <sys/nvpair.h> | |
31 | #ifdef _KERNEL | |
34dc7c2f BB |
32 | #include <sys/sid.h> |
33 | #include <sys/zfs_vfsops.h> | |
34 | #include <sys/zfs_znode.h> | |
35 | #endif | |
36 | #include <sys/zfs_fuid.h> | |
37 | ||
38 | /* | |
39 | * FUID Domain table(s). | |
40 | * | |
41 | * The FUID table is stored as a packed nvlist of an array | |
42 | * of nvlists which contain an index, domain string and offset | |
43 | * | |
44 | * During file system initialization the nvlist(s) are read and | |
45 | * two AVL trees are created. One tree is keyed by the index number | |
46 | * and the other by the domain string. Nodes are never removed from | |
9babb374 | 47 | * trees, but new entries may be added. If a new entry is added then |
0037b49e | 48 | * the zfsvfs->z_fuid_dirty flag is set to true and the caller will then |
9babb374 BB |
49 | * be responsible for calling zfs_fuid_sync() to sync the changes to disk. |
50 | * | |
34dc7c2f BB |
51 | */ |
52 | ||
53 | #define FUID_IDX "fuid_idx" | |
54 | #define FUID_DOMAIN "fuid_domain" | |
55 | #define FUID_OFFSET "fuid_offset" | |
56 | #define FUID_NVP_ARRAY "fuid_nvlist" | |
57 | ||
58 | typedef struct fuid_domain { | |
59 | avl_node_t f_domnode; | |
60 | avl_node_t f_idxnode; | |
61 | ksiddomain_t *f_ksid; | |
62 | uint64_t f_idx; | |
63 | } fuid_domain_t; | |
64 | ||
b128c09f BB |
65 | static char *nulldomain = ""; |
66 | ||
34dc7c2f BB |
67 | /* |
68 | * Compare two indexes. | |
69 | */ | |
70 | static int | |
71 | idx_compare(const void *arg1, const void *arg2) | |
72 | { | |
ee36c709 GN |
73 | const fuid_domain_t *node1 = (const fuid_domain_t *)arg1; |
74 | const fuid_domain_t *node2 = (const fuid_domain_t *)arg2; | |
34dc7c2f | 75 | |
ee36c709 | 76 | return (AVL_CMP(node1->f_idx, node2->f_idx)); |
34dc7c2f BB |
77 | } |
78 | ||
79 | /* | |
80 | * Compare two domain strings. | |
81 | */ | |
82 | static int | |
83 | domain_compare(const void *arg1, const void *arg2) | |
84 | { | |
ee36c709 GN |
85 | const fuid_domain_t *node1 = (const fuid_domain_t *)arg1; |
86 | const fuid_domain_t *node2 = (const fuid_domain_t *)arg2; | |
34dc7c2f BB |
87 | int val; |
88 | ||
89 | val = strcmp(node1->f_ksid->kd_name, node2->f_ksid->kd_name); | |
ee36c709 GN |
90 | |
91 | return (AVL_ISIGN(val)); | |
34dc7c2f BB |
92 | } |
93 | ||
9babb374 BB |
94 | void |
95 | zfs_fuid_avl_tree_create(avl_tree_t *idx_tree, avl_tree_t *domain_tree) | |
96 | { | |
97 | avl_create(idx_tree, idx_compare, | |
98 | sizeof (fuid_domain_t), offsetof(fuid_domain_t, f_idxnode)); | |
99 | avl_create(domain_tree, domain_compare, | |
100 | sizeof (fuid_domain_t), offsetof(fuid_domain_t, f_domnode)); | |
101 | } | |
102 | ||
34dc7c2f BB |
103 | /* |
104 | * load initial fuid domain and idx trees. This function is used by | |
105 | * both the kernel and zdb. | |
106 | */ | |
107 | uint64_t | |
108 | zfs_fuid_table_load(objset_t *os, uint64_t fuid_obj, avl_tree_t *idx_tree, | |
109 | avl_tree_t *domain_tree) | |
110 | { | |
111 | dmu_buf_t *db; | |
112 | uint64_t fuid_size; | |
113 | ||
9babb374 BB |
114 | ASSERT(fuid_obj != 0); |
115 | VERIFY(0 == dmu_bonus_hold(os, fuid_obj, | |
116 | FTAG, &db)); | |
34dc7c2f BB |
117 | fuid_size = *(uint64_t *)db->db_data; |
118 | dmu_buf_rele(db, FTAG); | |
119 | ||
120 | if (fuid_size) { | |
121 | nvlist_t **fuidnvp; | |
122 | nvlist_t *nvp = NULL; | |
123 | uint_t count; | |
124 | char *packed; | |
125 | int i; | |
126 | ||
127 | packed = kmem_alloc(fuid_size, KM_SLEEP); | |
9babb374 BB |
128 | VERIFY(dmu_read(os, fuid_obj, 0, |
129 | fuid_size, packed, DMU_READ_PREFETCH) == 0); | |
34dc7c2f BB |
130 | VERIFY(nvlist_unpack(packed, fuid_size, |
131 | &nvp, 0) == 0); | |
132 | VERIFY(nvlist_lookup_nvlist_array(nvp, FUID_NVP_ARRAY, | |
133 | &fuidnvp, &count) == 0); | |
134 | ||
135 | for (i = 0; i != count; i++) { | |
136 | fuid_domain_t *domnode; | |
137 | char *domain; | |
138 | uint64_t idx; | |
139 | ||
140 | VERIFY(nvlist_lookup_string(fuidnvp[i], FUID_DOMAIN, | |
141 | &domain) == 0); | |
142 | VERIFY(nvlist_lookup_uint64(fuidnvp[i], FUID_IDX, | |
143 | &idx) == 0); | |
144 | ||
145 | domnode = kmem_alloc(sizeof (fuid_domain_t), KM_SLEEP); | |
146 | ||
147 | domnode->f_idx = idx; | |
148 | domnode->f_ksid = ksid_lookupdomain(domain); | |
149 | avl_add(idx_tree, domnode); | |
150 | avl_add(domain_tree, domnode); | |
151 | } | |
152 | nvlist_free(nvp); | |
153 | kmem_free(packed, fuid_size); | |
154 | } | |
155 | return (fuid_size); | |
156 | } | |
157 | ||
158 | void | |
159 | zfs_fuid_table_destroy(avl_tree_t *idx_tree, avl_tree_t *domain_tree) | |
160 | { | |
161 | fuid_domain_t *domnode; | |
162 | void *cookie; | |
163 | ||
164 | cookie = NULL; | |
c65aa5b2 | 165 | while ((domnode = avl_destroy_nodes(domain_tree, &cookie))) |
34dc7c2f BB |
166 | ksiddomain_rele(domnode->f_ksid); |
167 | ||
168 | avl_destroy(domain_tree); | |
169 | cookie = NULL; | |
c65aa5b2 | 170 | while ((domnode = avl_destroy_nodes(idx_tree, &cookie))) |
34dc7c2f BB |
171 | kmem_free(domnode, sizeof (fuid_domain_t)); |
172 | avl_destroy(idx_tree); | |
173 | } | |
174 | ||
175 | char * | |
176 | zfs_fuid_idx_domain(avl_tree_t *idx_tree, uint32_t idx) | |
177 | { | |
178 | fuid_domain_t searchnode, *findnode; | |
179 | avl_index_t loc; | |
180 | ||
181 | searchnode.f_idx = idx; | |
182 | ||
183 | findnode = avl_find(idx_tree, &searchnode, &loc); | |
184 | ||
b128c09f | 185 | return (findnode ? findnode->f_ksid->kd_name : nulldomain); |
34dc7c2f BB |
186 | } |
187 | ||
188 | #ifdef _KERNEL | |
189 | /* | |
190 | * Load the fuid table(s) into memory. | |
191 | */ | |
192 | static void | |
0037b49e | 193 | zfs_fuid_init(zfsvfs_t *zfsvfs) |
34dc7c2f | 194 | { |
0037b49e | 195 | rw_enter(&zfsvfs->z_fuid_lock, RW_WRITER); |
34dc7c2f | 196 | |
0037b49e BB |
197 | if (zfsvfs->z_fuid_loaded) { |
198 | rw_exit(&zfsvfs->z_fuid_lock); | |
34dc7c2f BB |
199 | return; |
200 | } | |
201 | ||
0037b49e | 202 | zfs_fuid_avl_tree_create(&zfsvfs->z_fuid_idx, &zfsvfs->z_fuid_domain); |
34dc7c2f | 203 | |
0037b49e BB |
204 | (void) zap_lookup(zfsvfs->z_os, MASTER_NODE_OBJ, |
205 | ZFS_FUID_TABLES, 8, 1, &zfsvfs->z_fuid_obj); | |
206 | if (zfsvfs->z_fuid_obj != 0) { | |
207 | zfsvfs->z_fuid_size = zfs_fuid_table_load(zfsvfs->z_os, | |
208 | zfsvfs->z_fuid_obj, &zfsvfs->z_fuid_idx, | |
209 | &zfsvfs->z_fuid_domain); | |
b128c09f | 210 | } |
34dc7c2f | 211 | |
0037b49e BB |
212 | zfsvfs->z_fuid_loaded = B_TRUE; |
213 | rw_exit(&zfsvfs->z_fuid_lock); | |
9babb374 BB |
214 | } |
215 | ||
216 | /* | |
217 | * sync out AVL trees to persistent storage. | |
218 | */ | |
219 | void | |
0037b49e | 220 | zfs_fuid_sync(zfsvfs_t *zfsvfs, dmu_tx_t *tx) |
9babb374 BB |
221 | { |
222 | nvlist_t *nvp; | |
223 | nvlist_t **fuids; | |
224 | size_t nvsize = 0; | |
225 | char *packed; | |
226 | dmu_buf_t *db; | |
227 | fuid_domain_t *domnode; | |
228 | int numnodes; | |
229 | int i; | |
230 | ||
0037b49e | 231 | if (!zfsvfs->z_fuid_dirty) { |
9babb374 BB |
232 | return; |
233 | } | |
234 | ||
0037b49e | 235 | rw_enter(&zfsvfs->z_fuid_lock, RW_WRITER); |
9babb374 BB |
236 | |
237 | /* | |
238 | * First see if table needs to be created? | |
239 | */ | |
0037b49e BB |
240 | if (zfsvfs->z_fuid_obj == 0) { |
241 | zfsvfs->z_fuid_obj = dmu_object_alloc(zfsvfs->z_os, | |
9babb374 BB |
242 | DMU_OT_FUID, 1 << 14, DMU_OT_FUID_SIZE, |
243 | sizeof (uint64_t), tx); | |
0037b49e | 244 | VERIFY(zap_add(zfsvfs->z_os, MASTER_NODE_OBJ, |
9babb374 | 245 | ZFS_FUID_TABLES, sizeof (uint64_t), 1, |
0037b49e | 246 | &zfsvfs->z_fuid_obj, tx) == 0); |
9babb374 BB |
247 | } |
248 | ||
249 | VERIFY(nvlist_alloc(&nvp, NV_UNIQUE_NAME, KM_SLEEP) == 0); | |
250 | ||
0037b49e | 251 | numnodes = avl_numnodes(&zfsvfs->z_fuid_idx); |
9babb374 | 252 | fuids = kmem_alloc(numnodes * sizeof (void *), KM_SLEEP); |
0037b49e BB |
253 | for (i = 0, domnode = avl_first(&zfsvfs->z_fuid_domain); domnode; i++, |
254 | domnode = AVL_NEXT(&zfsvfs->z_fuid_domain, domnode)) { | |
9babb374 BB |
255 | VERIFY(nvlist_alloc(&fuids[i], NV_UNIQUE_NAME, KM_SLEEP) == 0); |
256 | VERIFY(nvlist_add_uint64(fuids[i], FUID_IDX, | |
257 | domnode->f_idx) == 0); | |
258 | VERIFY(nvlist_add_uint64(fuids[i], FUID_OFFSET, 0) == 0); | |
259 | VERIFY(nvlist_add_string(fuids[i], FUID_DOMAIN, | |
260 | domnode->f_ksid->kd_name) == 0); | |
261 | } | |
262 | VERIFY(nvlist_add_nvlist_array(nvp, FUID_NVP_ARRAY, | |
263 | fuids, numnodes) == 0); | |
264 | for (i = 0; i != numnodes; i++) | |
265 | nvlist_free(fuids[i]); | |
266 | kmem_free(fuids, numnodes * sizeof (void *)); | |
267 | VERIFY(nvlist_size(nvp, &nvsize, NV_ENCODE_XDR) == 0); | |
268 | packed = kmem_alloc(nvsize, KM_SLEEP); | |
269 | VERIFY(nvlist_pack(nvp, &packed, &nvsize, | |
270 | NV_ENCODE_XDR, KM_SLEEP) == 0); | |
271 | nvlist_free(nvp); | |
0037b49e BB |
272 | zfsvfs->z_fuid_size = nvsize; |
273 | dmu_write(zfsvfs->z_os, zfsvfs->z_fuid_obj, 0, | |
274 | zfsvfs->z_fuid_size, packed, tx); | |
275 | kmem_free(packed, zfsvfs->z_fuid_size); | |
276 | VERIFY(0 == dmu_bonus_hold(zfsvfs->z_os, zfsvfs->z_fuid_obj, | |
9babb374 BB |
277 | FTAG, &db)); |
278 | dmu_buf_will_dirty(db, tx); | |
0037b49e | 279 | *(uint64_t *)db->db_data = zfsvfs->z_fuid_size; |
9babb374 BB |
280 | dmu_buf_rele(db, FTAG); |
281 | ||
0037b49e BB |
282 | zfsvfs->z_fuid_dirty = B_FALSE; |
283 | rw_exit(&zfsvfs->z_fuid_lock); | |
34dc7c2f BB |
284 | } |
285 | ||
286 | /* | |
287 | * Query domain table for a given domain. | |
288 | * | |
9babb374 | 289 | * If domain isn't found and addok is set, it is added to AVL trees and |
0037b49e | 290 | * the zfsvfs->z_fuid_dirty flag will be set to TRUE. It will then be |
9babb374 BB |
291 | * necessary for the caller or another thread to detect the dirty table |
292 | * and sync out the changes. | |
34dc7c2f BB |
293 | */ |
294 | int | |
0037b49e | 295 | zfs_fuid_find_by_domain(zfsvfs_t *zfsvfs, const char *domain, |
9babb374 | 296 | char **retdomain, boolean_t addok) |
34dc7c2f BB |
297 | { |
298 | fuid_domain_t searchnode, *findnode; | |
299 | avl_index_t loc; | |
b128c09f | 300 | krw_t rw = RW_READER; |
34dc7c2f BB |
301 | |
302 | /* | |
303 | * If the dummy "nobody" domain then return an index of 0 | |
304 | * to cause the created FUID to be a standard POSIX id | |
305 | * for the user nobody. | |
306 | */ | |
307 | if (domain[0] == '\0') { | |
9babb374 BB |
308 | if (retdomain) |
309 | *retdomain = nulldomain; | |
34dc7c2f BB |
310 | return (0); |
311 | } | |
312 | ||
313 | searchnode.f_ksid = ksid_lookupdomain(domain); | |
9babb374 | 314 | if (retdomain) |
34dc7c2f | 315 | *retdomain = searchnode.f_ksid->kd_name; |
0037b49e BB |
316 | if (!zfsvfs->z_fuid_loaded) |
317 | zfs_fuid_init(zfsvfs); | |
34dc7c2f | 318 | |
b128c09f | 319 | retry: |
0037b49e BB |
320 | rw_enter(&zfsvfs->z_fuid_lock, rw); |
321 | findnode = avl_find(&zfsvfs->z_fuid_domain, &searchnode, &loc); | |
34dc7c2f BB |
322 | |
323 | if (findnode) { | |
0037b49e | 324 | rw_exit(&zfsvfs->z_fuid_lock); |
34dc7c2f BB |
325 | ksiddomain_rele(searchnode.f_ksid); |
326 | return (findnode->f_idx); | |
9babb374 | 327 | } else if (addok) { |
34dc7c2f | 328 | fuid_domain_t *domnode; |
34dc7c2f | 329 | uint64_t retidx; |
34dc7c2f | 330 | |
0037b49e BB |
331 | if (rw == RW_READER && !rw_tryupgrade(&zfsvfs->z_fuid_lock)) { |
332 | rw_exit(&zfsvfs->z_fuid_lock); | |
b128c09f BB |
333 | rw = RW_WRITER; |
334 | goto retry; | |
335 | } | |
336 | ||
34dc7c2f BB |
337 | domnode = kmem_alloc(sizeof (fuid_domain_t), KM_SLEEP); |
338 | domnode->f_ksid = searchnode.f_ksid; | |
339 | ||
0037b49e | 340 | retidx = domnode->f_idx = avl_numnodes(&zfsvfs->z_fuid_idx) + 1; |
34dc7c2f | 341 | |
0037b49e BB |
342 | avl_add(&zfsvfs->z_fuid_domain, domnode); |
343 | avl_add(&zfsvfs->z_fuid_idx, domnode); | |
344 | zfsvfs->z_fuid_dirty = B_TRUE; | |
345 | rw_exit(&zfsvfs->z_fuid_lock); | |
34dc7c2f | 346 | return (retidx); |
9babb374 | 347 | } else { |
0037b49e | 348 | rw_exit(&zfsvfs->z_fuid_lock); |
9babb374 | 349 | return (-1); |
34dc7c2f BB |
350 | } |
351 | } | |
352 | ||
353 | /* | |
354 | * Query domain table by index, returning domain string | |
355 | * | |
356 | * Returns a pointer from an avl node of the domain string. | |
357 | * | |
358 | */ | |
9babb374 | 359 | const char * |
0037b49e | 360 | zfs_fuid_find_by_idx(zfsvfs_t *zfsvfs, uint32_t idx) |
34dc7c2f BB |
361 | { |
362 | char *domain; | |
363 | ||
0037b49e | 364 | if (idx == 0 || !zfsvfs->z_use_fuids) |
34dc7c2f BB |
365 | return (NULL); |
366 | ||
0037b49e BB |
367 | if (!zfsvfs->z_fuid_loaded) |
368 | zfs_fuid_init(zfsvfs); | |
34dc7c2f | 369 | |
0037b49e | 370 | rw_enter(&zfsvfs->z_fuid_lock, RW_READER); |
b128c09f | 371 | |
0037b49e BB |
372 | if (zfsvfs->z_fuid_obj || zfsvfs->z_fuid_dirty) |
373 | domain = zfs_fuid_idx_domain(&zfsvfs->z_fuid_idx, idx); | |
b128c09f BB |
374 | else |
375 | domain = nulldomain; | |
0037b49e | 376 | rw_exit(&zfsvfs->z_fuid_lock); |
34dc7c2f BB |
377 | |
378 | ASSERT(domain); | |
379 | return (domain); | |
380 | } | |
381 | ||
382 | void | |
383 | zfs_fuid_map_ids(znode_t *zp, cred_t *cr, uid_t *uidp, uid_t *gidp) | |
384 | { | |
2c6abf15 NB |
385 | *uidp = zfs_fuid_map_id(ZTOZSB(zp), KUID_TO_SUID(ZTOI(zp)->i_uid), |
386 | cr, ZFS_OWNER); | |
387 | *gidp = zfs_fuid_map_id(ZTOZSB(zp), KGID_TO_SGID(ZTOI(zp)->i_gid), | |
388 | cr, ZFS_GROUP); | |
34dc7c2f BB |
389 | } |
390 | ||
391 | uid_t | |
0037b49e | 392 | zfs_fuid_map_id(zfsvfs_t *zfsvfs, uint64_t fuid, |
34dc7c2f BB |
393 | cred_t *cr, zfs_fuid_type_t type) |
394 | { | |
a405c8a6 | 395 | #ifdef HAVE_KSID |
34dc7c2f | 396 | uint32_t index = FUID_INDEX(fuid); |
9babb374 | 397 | const char *domain; |
34dc7c2f BB |
398 | uid_t id; |
399 | ||
400 | if (index == 0) | |
401 | return (fuid); | |
402 | ||
0037b49e | 403 | domain = zfs_fuid_find_by_idx(zfsvfs, index); |
34dc7c2f BB |
404 | ASSERT(domain != NULL); |
405 | ||
406 | if (type == ZFS_OWNER || type == ZFS_ACE_USER) { | |
407 | (void) kidmap_getuidbysid(crgetzone(cr), domain, | |
408 | FUID_RID(fuid), &id); | |
409 | } else { | |
410 | (void) kidmap_getgidbysid(crgetzone(cr), domain, | |
411 | FUID_RID(fuid), &id); | |
412 | } | |
413 | return (id); | |
a405c8a6 | 414 | #else |
5484965a BB |
415 | /* |
416 | * The Linux port only supports POSIX IDs, use the passed id. | |
417 | */ | |
418 | return (fuid); | |
a405c8a6 | 419 | #endif /* HAVE_KSID */ |
34dc7c2f BB |
420 | } |
421 | ||
422 | /* | |
423 | * Add a FUID node to the list of fuid's being created for this | |
424 | * ACL | |
425 | * | |
426 | * If ACL has multiple domains, then keep only one copy of each unique | |
427 | * domain. | |
428 | */ | |
428870ff | 429 | void |
34dc7c2f BB |
430 | zfs_fuid_node_add(zfs_fuid_info_t **fuidpp, const char *domain, uint32_t rid, |
431 | uint64_t idx, uint64_t id, zfs_fuid_type_t type) | |
432 | { | |
433 | zfs_fuid_t *fuid; | |
434 | zfs_fuid_domain_t *fuid_domain; | |
435 | zfs_fuid_info_t *fuidp; | |
436 | uint64_t fuididx; | |
437 | boolean_t found = B_FALSE; | |
438 | ||
439 | if (*fuidpp == NULL) | |
440 | *fuidpp = zfs_fuid_info_alloc(); | |
441 | ||
442 | fuidp = *fuidpp; | |
443 | /* | |
444 | * First find fuid domain index in linked list | |
445 | * | |
446 | * If one isn't found then create an entry. | |
447 | */ | |
448 | ||
449 | for (fuididx = 1, fuid_domain = list_head(&fuidp->z_domains); | |
450 | fuid_domain; fuid_domain = list_next(&fuidp->z_domains, | |
451 | fuid_domain), fuididx++) { | |
452 | if (idx == fuid_domain->z_domidx) { | |
453 | found = B_TRUE; | |
454 | break; | |
455 | } | |
456 | } | |
457 | ||
458 | if (!found) { | |
459 | fuid_domain = kmem_alloc(sizeof (zfs_fuid_domain_t), KM_SLEEP); | |
460 | fuid_domain->z_domain = domain; | |
461 | fuid_domain->z_domidx = idx; | |
462 | list_insert_tail(&fuidp->z_domains, fuid_domain); | |
463 | fuidp->z_domain_str_sz += strlen(domain) + 1; | |
464 | fuidp->z_domain_cnt++; | |
465 | } | |
466 | ||
467 | if (type == ZFS_ACE_USER || type == ZFS_ACE_GROUP) { | |
9babb374 | 468 | |
34dc7c2f BB |
469 | /* |
470 | * Now allocate fuid entry and add it on the end of the list | |
471 | */ | |
472 | ||
473 | fuid = kmem_alloc(sizeof (zfs_fuid_t), KM_SLEEP); | |
474 | fuid->z_id = id; | |
475 | fuid->z_domidx = idx; | |
476 | fuid->z_logfuid = FUID_ENCODE(fuididx, rid); | |
477 | ||
478 | list_insert_tail(&fuidp->z_fuids, fuid); | |
479 | fuidp->z_fuid_cnt++; | |
480 | } else { | |
481 | if (type == ZFS_OWNER) | |
482 | fuidp->z_fuid_owner = FUID_ENCODE(fuididx, rid); | |
483 | else | |
484 | fuidp->z_fuid_group = FUID_ENCODE(fuididx, rid); | |
485 | } | |
486 | } | |
487 | ||
100a91aa | 488 | #ifdef HAVE_KSID |
34dc7c2f BB |
489 | /* |
490 | * Create a file system FUID, based on information in the users cred | |
428870ff BB |
491 | * |
492 | * If cred contains KSID_OWNER then it should be used to determine | |
493 | * the uid otherwise cred's uid will be used. By default cred's gid | |
494 | * is used unless it's an ephemeral ID in which case KSID_GROUP will | |
495 | * be used if it exists. | |
34dc7c2f BB |
496 | */ |
497 | uint64_t | |
0037b49e | 498 | zfs_fuid_create_cred(zfsvfs_t *zfsvfs, zfs_fuid_type_t type, |
9babb374 | 499 | cred_t *cr, zfs_fuid_info_t **fuidp) |
34dc7c2f BB |
500 | { |
501 | uint64_t idx; | |
502 | ksid_t *ksid; | |
503 | uint32_t rid; | |
3558fd73 | 504 | char *kdomain; |
34dc7c2f BB |
505 | const char *domain; |
506 | uid_t id; | |
507 | ||
508 | VERIFY(type == ZFS_OWNER || type == ZFS_GROUP); | |
509 | ||
b128c09f | 510 | ksid = crgetsid(cr, (type == ZFS_OWNER) ? KSID_OWNER : KSID_GROUP); |
428870ff | 511 | |
0037b49e | 512 | if (!zfsvfs->z_use_fuids || (ksid == NULL)) { |
428870ff BB |
513 | id = (type == ZFS_OWNER) ? crgetuid(cr) : crgetgid(cr); |
514 | ||
515 | if (IS_EPHEMERAL(id)) | |
516 | return ((type == ZFS_OWNER) ? UID_NOBODY : GID_NOBODY); | |
517 | ||
518 | return ((uint64_t)id); | |
b128c09f | 519 | } |
34dc7c2f | 520 | |
428870ff BB |
521 | /* |
522 | * ksid is present and FUID is supported | |
523 | */ | |
524 | id = (type == ZFS_OWNER) ? ksid_getid(ksid) : crgetgid(cr); | |
525 | ||
526 | if (!IS_EPHEMERAL(id)) | |
34dc7c2f BB |
527 | return ((uint64_t)id); |
528 | ||
428870ff BB |
529 | if (type == ZFS_GROUP) |
530 | id = ksid_getid(ksid); | |
531 | ||
34dc7c2f BB |
532 | rid = ksid_getrid(ksid); |
533 | domain = ksid_getdomain(ksid); | |
534 | ||
0037b49e | 535 | idx = zfs_fuid_find_by_domain(zfsvfs, domain, &kdomain, B_TRUE); |
34dc7c2f BB |
536 | |
537 | zfs_fuid_node_add(fuidp, kdomain, rid, idx, id, type); | |
538 | ||
539 | return (FUID_ENCODE(idx, rid)); | |
f74b821a | 540 | } |
100a91aa | 541 | #endif /* HAVE_KSID */ |
34dc7c2f BB |
542 | |
543 | /* | |
544 | * Create a file system FUID for an ACL ace | |
545 | * or a chown/chgrp of the file. | |
546 | * This is similar to zfs_fuid_create_cred, except that | |
547 | * we can't find the domain + rid information in the | |
548 | * cred. Instead we have to query Winchester for the | |
549 | * domain and rid. | |
550 | * | |
551 | * During replay operations the domain+rid information is | |
552 | * found in the zfs_fuid_info_t that the replay code has | |
0037b49e | 553 | * attached to the zfsvfs of the file system. |
34dc7c2f BB |
554 | */ |
555 | uint64_t | |
0037b49e | 556 | zfs_fuid_create(zfsvfs_t *zfsvfs, uint64_t id, cred_t *cr, |
9babb374 | 557 | zfs_fuid_type_t type, zfs_fuid_info_t **fuidpp) |
34dc7c2f | 558 | { |
a405c8a6 | 559 | #ifdef HAVE_KSID |
34dc7c2f BB |
560 | const char *domain; |
561 | char *kdomain; | |
562 | uint32_t fuid_idx = FUID_INDEX(id); | |
563 | uint32_t rid; | |
564 | idmap_stat status; | |
a117a6d6 | 565 | uint64_t idx = 0; |
34dc7c2f | 566 | zfs_fuid_t *zfuid = NULL; |
a117a6d6 | 567 | zfs_fuid_info_t *fuidp = NULL; |
34dc7c2f BB |
568 | |
569 | /* | |
570 | * If POSIX ID, or entry is already a FUID then | |
571 | * just return the id | |
572 | * | |
573 | * We may also be handed an already FUID'ized id via | |
574 | * chmod. | |
575 | */ | |
576 | ||
0037b49e | 577 | if (!zfsvfs->z_use_fuids || !IS_EPHEMERAL(id) || fuid_idx != 0) |
34dc7c2f BB |
578 | return (id); |
579 | ||
0037b49e BB |
580 | if (zfsvfs->z_replay) { |
581 | fuidp = zfsvfs->z_fuid_replay; | |
34dc7c2f BB |
582 | |
583 | /* | |
584 | * If we are passed an ephemeral id, but no | |
585 | * fuid_info was logged then return NOBODY. | |
586 | * This is most likely a result of idmap service | |
587 | * not being available. | |
588 | */ | |
589 | if (fuidp == NULL) | |
590 | return (UID_NOBODY); | |
591 | ||
a117a6d6 GW |
592 | VERIFY3U(type, >=, ZFS_OWNER); |
593 | VERIFY3U(type, <=, ZFS_ACE_GROUP); | |
594 | ||
34dc7c2f BB |
595 | switch (type) { |
596 | case ZFS_ACE_USER: | |
597 | case ZFS_ACE_GROUP: | |
598 | zfuid = list_head(&fuidp->z_fuids); | |
599 | rid = FUID_RID(zfuid->z_logfuid); | |
600 | idx = FUID_INDEX(zfuid->z_logfuid); | |
601 | break; | |
602 | case ZFS_OWNER: | |
603 | rid = FUID_RID(fuidp->z_fuid_owner); | |
604 | idx = FUID_INDEX(fuidp->z_fuid_owner); | |
605 | break; | |
606 | case ZFS_GROUP: | |
607 | rid = FUID_RID(fuidp->z_fuid_group); | |
608 | idx = FUID_INDEX(fuidp->z_fuid_group); | |
609 | break; | |
610 | }; | |
a117a6d6 | 611 | domain = fuidp->z_domain_table[idx - 1]; |
34dc7c2f BB |
612 | } else { |
613 | if (type == ZFS_OWNER || type == ZFS_ACE_USER) | |
614 | status = kidmap_getsidbyuid(crgetzone(cr), id, | |
615 | &domain, &rid); | |
616 | else | |
617 | status = kidmap_getsidbygid(crgetzone(cr), id, | |
618 | &domain, &rid); | |
619 | ||
620 | if (status != 0) { | |
621 | /* | |
622 | * When returning nobody we will need to | |
623 | * make a dummy fuid table entry for logging | |
624 | * purposes. | |
625 | */ | |
626 | rid = UID_NOBODY; | |
b128c09f | 627 | domain = nulldomain; |
34dc7c2f BB |
628 | } |
629 | } | |
630 | ||
0037b49e | 631 | idx = zfs_fuid_find_by_domain(zfsvfs, domain, &kdomain, B_TRUE); |
34dc7c2f | 632 | |
0037b49e | 633 | if (!zfsvfs->z_replay) |
9babb374 BB |
634 | zfs_fuid_node_add(fuidpp, kdomain, |
635 | rid, idx, id, type); | |
34dc7c2f BB |
636 | else if (zfuid != NULL) { |
637 | list_remove(&fuidp->z_fuids, zfuid); | |
638 | kmem_free(zfuid, sizeof (zfs_fuid_t)); | |
639 | } | |
640 | return (FUID_ENCODE(idx, rid)); | |
a405c8a6 | 641 | #else |
037849f8 BB |
642 | /* |
643 | * The Linux port only supports POSIX IDs, use the passed id. | |
644 | */ | |
645 | return (id); | |
a405c8a6 | 646 | #endif |
34dc7c2f BB |
647 | } |
648 | ||
649 | void | |
0037b49e | 650 | zfs_fuid_destroy(zfsvfs_t *zfsvfs) |
34dc7c2f | 651 | { |
0037b49e BB |
652 | rw_enter(&zfsvfs->z_fuid_lock, RW_WRITER); |
653 | if (!zfsvfs->z_fuid_loaded) { | |
654 | rw_exit(&zfsvfs->z_fuid_lock); | |
34dc7c2f BB |
655 | return; |
656 | } | |
0037b49e BB |
657 | zfs_fuid_table_destroy(&zfsvfs->z_fuid_idx, &zfsvfs->z_fuid_domain); |
658 | rw_exit(&zfsvfs->z_fuid_lock); | |
34dc7c2f BB |
659 | } |
660 | ||
661 | /* | |
662 | * Allocate zfs_fuid_info for tracking FUIDs created during | |
663 | * zfs_mknode, VOP_SETATTR() or VOP_SETSECATTR() | |
664 | */ | |
665 | zfs_fuid_info_t * | |
666 | zfs_fuid_info_alloc(void) | |
667 | { | |
668 | zfs_fuid_info_t *fuidp; | |
669 | ||
670 | fuidp = kmem_zalloc(sizeof (zfs_fuid_info_t), KM_SLEEP); | |
671 | list_create(&fuidp->z_domains, sizeof (zfs_fuid_domain_t), | |
672 | offsetof(zfs_fuid_domain_t, z_next)); | |
673 | list_create(&fuidp->z_fuids, sizeof (zfs_fuid_t), | |
674 | offsetof(zfs_fuid_t, z_next)); | |
675 | return (fuidp); | |
676 | } | |
677 | ||
678 | /* | |
679 | * Release all memory associated with zfs_fuid_info_t | |
680 | */ | |
681 | void | |
682 | zfs_fuid_info_free(zfs_fuid_info_t *fuidp) | |
683 | { | |
684 | zfs_fuid_t *zfuid; | |
685 | zfs_fuid_domain_t *zdomain; | |
686 | ||
687 | while ((zfuid = list_head(&fuidp->z_fuids)) != NULL) { | |
688 | list_remove(&fuidp->z_fuids, zfuid); | |
689 | kmem_free(zfuid, sizeof (zfs_fuid_t)); | |
690 | } | |
691 | ||
692 | if (fuidp->z_domain_table != NULL) | |
693 | kmem_free(fuidp->z_domain_table, | |
160987b5 | 694 | (sizeof (char *)) * fuidp->z_domain_cnt); |
34dc7c2f BB |
695 | |
696 | while ((zdomain = list_head(&fuidp->z_domains)) != NULL) { | |
697 | list_remove(&fuidp->z_domains, zdomain); | |
698 | kmem_free(zdomain, sizeof (zfs_fuid_domain_t)); | |
699 | } | |
700 | ||
701 | kmem_free(fuidp, sizeof (zfs_fuid_info_t)); | |
702 | } | |
703 | ||
704 | /* | |
705 | * Check to see if id is a groupmember. If cred | |
706 | * has ksid info then sidlist is checked first | |
707 | * and if still not found then POSIX groups are checked | |
708 | * | |
709 | * Will use a straight FUID compare when possible. | |
710 | */ | |
711 | boolean_t | |
0037b49e | 712 | zfs_groupmember(zfsvfs_t *zfsvfs, uint64_t id, cred_t *cr) |
34dc7c2f | 713 | { |
a405c8a6 | 714 | #ifdef HAVE_KSID |
34dc7c2f | 715 | ksid_t *ksid = crgetsid(cr, KSID_GROUP); |
9babb374 | 716 | ksidlist_t *ksidlist = crgetsidlist(cr); |
34dc7c2f BB |
717 | uid_t gid; |
718 | ||
9babb374 | 719 | if (ksid && ksidlist) { |
3558fd73 | 720 | int i; |
34dc7c2f | 721 | ksid_t *ksid_groups; |
34dc7c2f BB |
722 | uint32_t idx = FUID_INDEX(id); |
723 | uint32_t rid = FUID_RID(id); | |
724 | ||
34dc7c2f BB |
725 | ksid_groups = ksidlist->ksl_sids; |
726 | ||
727 | for (i = 0; i != ksidlist->ksl_nsid; i++) { | |
728 | if (idx == 0) { | |
729 | if (id != IDMAP_WK_CREATOR_GROUP_GID && | |
730 | id == ksid_groups[i].ks_id) { | |
731 | return (B_TRUE); | |
732 | } | |
733 | } else { | |
9babb374 | 734 | const char *domain; |
34dc7c2f | 735 | |
0037b49e | 736 | domain = zfs_fuid_find_by_idx(zfsvfs, idx); |
34dc7c2f BB |
737 | ASSERT(domain != NULL); |
738 | ||
739 | if (strcmp(domain, | |
740 | IDMAP_WK_CREATOR_SID_AUTHORITY) == 0) | |
741 | return (B_FALSE); | |
742 | ||
743 | if ((strcmp(domain, | |
744 | ksid_groups[i].ks_domain->kd_name) == 0) && | |
745 | rid == ksid_groups[i].ks_rid) | |
746 | return (B_TRUE); | |
747 | } | |
748 | } | |
749 | } | |
750 | ||
751 | /* | |
752 | * Not found in ksidlist, check posix groups | |
753 | */ | |
0037b49e | 754 | gid = zfs_fuid_map_id(zfsvfs, id, cr, ZFS_GROUP); |
34dc7c2f | 755 | return (groupmember(gid, cr)); |
a405c8a6 BB |
756 | #else |
757 | return (B_TRUE); | |
758 | #endif | |
34dc7c2f | 759 | } |
9babb374 BB |
760 | |
761 | void | |
0037b49e | 762 | zfs_fuid_txhold(zfsvfs_t *zfsvfs, dmu_tx_t *tx) |
9babb374 | 763 | { |
0037b49e | 764 | if (zfsvfs->z_fuid_obj == 0) { |
9babb374 BB |
765 | dmu_tx_hold_bonus(tx, DMU_NEW_OBJECT); |
766 | dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, | |
0037b49e | 767 | FUID_SIZE_ESTIMATE(zfsvfs)); |
9babb374 BB |
768 | dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, FALSE, NULL); |
769 | } else { | |
0037b49e BB |
770 | dmu_tx_hold_bonus(tx, zfsvfs->z_fuid_obj); |
771 | dmu_tx_hold_write(tx, zfsvfs->z_fuid_obj, 0, | |
772 | FUID_SIZE_ESTIMATE(zfsvfs)); | |
9babb374 BB |
773 | } |
774 | } | |
34dc7c2f | 775 | #endif |