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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 | /* | |
9babb374 | 22 | * Copyright 2009 Sun Microsystems, Inc. All rights reserved. |
34dc7c2f BB |
23 | * Use is subject to license terms. |
24 | */ | |
25 | ||
34dc7c2f BB |
26 | #include <sys/zfs_context.h> |
27 | #include <sys/sunddi.h> | |
28 | #include <sys/dmu.h> | |
29 | #include <sys/avl.h> | |
30 | #include <sys/zap.h> | |
31 | #include <sys/refcount.h> | |
32 | #include <sys/nvpair.h> | |
33 | #ifdef _KERNEL | |
34 | #include <sys/kidmap.h> | |
35 | #include <sys/sid.h> | |
36 | #include <sys/zfs_vfsops.h> | |
37 | #include <sys/zfs_znode.h> | |
38 | #endif | |
39 | #include <sys/zfs_fuid.h> | |
40 | ||
41 | /* | |
42 | * FUID Domain table(s). | |
43 | * | |
44 | * The FUID table is stored as a packed nvlist of an array | |
45 | * of nvlists which contain an index, domain string and offset | |
46 | * | |
47 | * During file system initialization the nvlist(s) are read and | |
48 | * two AVL trees are created. One tree is keyed by the index number | |
49 | * and the other by the domain string. Nodes are never removed from | |
9babb374 BB |
50 | * trees, but new entries may be added. If a new entry is added then |
51 | * the zfsvfs->z_fuid_dirty flag is set to true and the caller will then | |
52 | * be responsible for calling zfs_fuid_sync() to sync the changes to disk. | |
53 | * | |
34dc7c2f BB |
54 | */ |
55 | ||
56 | #define FUID_IDX "fuid_idx" | |
57 | #define FUID_DOMAIN "fuid_domain" | |
58 | #define FUID_OFFSET "fuid_offset" | |
59 | #define FUID_NVP_ARRAY "fuid_nvlist" | |
60 | ||
61 | typedef struct fuid_domain { | |
62 | avl_node_t f_domnode; | |
63 | avl_node_t f_idxnode; | |
64 | ksiddomain_t *f_ksid; | |
65 | uint64_t f_idx; | |
66 | } fuid_domain_t; | |
67 | ||
b128c09f BB |
68 | static char *nulldomain = ""; |
69 | ||
34dc7c2f BB |
70 | /* |
71 | * Compare two indexes. | |
72 | */ | |
73 | static int | |
74 | idx_compare(const void *arg1, const void *arg2) | |
75 | { | |
76 | const fuid_domain_t *node1 = arg1; | |
77 | const fuid_domain_t *node2 = arg2; | |
78 | ||
79 | if (node1->f_idx < node2->f_idx) | |
80 | return (-1); | |
81 | else if (node1->f_idx > node2->f_idx) | |
82 | return (1); | |
83 | return (0); | |
84 | } | |
85 | ||
86 | /* | |
87 | * Compare two domain strings. | |
88 | */ | |
89 | static int | |
90 | domain_compare(const void *arg1, const void *arg2) | |
91 | { | |
92 | const fuid_domain_t *node1 = arg1; | |
93 | const fuid_domain_t *node2 = arg2; | |
94 | int val; | |
95 | ||
96 | val = strcmp(node1->f_ksid->kd_name, node2->f_ksid->kd_name); | |
97 | if (val == 0) | |
98 | return (0); | |
99 | return (val > 0 ? 1 : -1); | |
100 | } | |
101 | ||
9babb374 BB |
102 | void |
103 | zfs_fuid_avl_tree_create(avl_tree_t *idx_tree, avl_tree_t *domain_tree) | |
104 | { | |
105 | avl_create(idx_tree, idx_compare, | |
106 | sizeof (fuid_domain_t), offsetof(fuid_domain_t, f_idxnode)); | |
107 | avl_create(domain_tree, domain_compare, | |
108 | sizeof (fuid_domain_t), offsetof(fuid_domain_t, f_domnode)); | |
109 | } | |
110 | ||
34dc7c2f BB |
111 | /* |
112 | * load initial fuid domain and idx trees. This function is used by | |
113 | * both the kernel and zdb. | |
114 | */ | |
115 | uint64_t | |
116 | zfs_fuid_table_load(objset_t *os, uint64_t fuid_obj, avl_tree_t *idx_tree, | |
117 | avl_tree_t *domain_tree) | |
118 | { | |
119 | dmu_buf_t *db; | |
120 | uint64_t fuid_size; | |
121 | ||
9babb374 BB |
122 | ASSERT(fuid_obj != 0); |
123 | VERIFY(0 == dmu_bonus_hold(os, fuid_obj, | |
124 | FTAG, &db)); | |
34dc7c2f BB |
125 | fuid_size = *(uint64_t *)db->db_data; |
126 | dmu_buf_rele(db, FTAG); | |
127 | ||
128 | if (fuid_size) { | |
129 | nvlist_t **fuidnvp; | |
130 | nvlist_t *nvp = NULL; | |
131 | uint_t count; | |
132 | char *packed; | |
133 | int i; | |
134 | ||
135 | packed = kmem_alloc(fuid_size, KM_SLEEP); | |
9babb374 BB |
136 | VERIFY(dmu_read(os, fuid_obj, 0, |
137 | fuid_size, packed, DMU_READ_PREFETCH) == 0); | |
34dc7c2f BB |
138 | VERIFY(nvlist_unpack(packed, fuid_size, |
139 | &nvp, 0) == 0); | |
140 | VERIFY(nvlist_lookup_nvlist_array(nvp, FUID_NVP_ARRAY, | |
141 | &fuidnvp, &count) == 0); | |
142 | ||
143 | for (i = 0; i != count; i++) { | |
144 | fuid_domain_t *domnode; | |
145 | char *domain; | |
146 | uint64_t idx; | |
147 | ||
148 | VERIFY(nvlist_lookup_string(fuidnvp[i], FUID_DOMAIN, | |
149 | &domain) == 0); | |
150 | VERIFY(nvlist_lookup_uint64(fuidnvp[i], FUID_IDX, | |
151 | &idx) == 0); | |
152 | ||
153 | domnode = kmem_alloc(sizeof (fuid_domain_t), KM_SLEEP); | |
154 | ||
155 | domnode->f_idx = idx; | |
156 | domnode->f_ksid = ksid_lookupdomain(domain); | |
157 | avl_add(idx_tree, domnode); | |
158 | avl_add(domain_tree, domnode); | |
159 | } | |
160 | nvlist_free(nvp); | |
161 | kmem_free(packed, fuid_size); | |
162 | } | |
163 | return (fuid_size); | |
164 | } | |
165 | ||
166 | void | |
167 | zfs_fuid_table_destroy(avl_tree_t *idx_tree, avl_tree_t *domain_tree) | |
168 | { | |
169 | fuid_domain_t *domnode; | |
170 | void *cookie; | |
171 | ||
172 | cookie = NULL; | |
173 | while (domnode = avl_destroy_nodes(domain_tree, &cookie)) | |
174 | ksiddomain_rele(domnode->f_ksid); | |
175 | ||
176 | avl_destroy(domain_tree); | |
177 | cookie = NULL; | |
178 | while (domnode = avl_destroy_nodes(idx_tree, &cookie)) | |
179 | kmem_free(domnode, sizeof (fuid_domain_t)); | |
180 | avl_destroy(idx_tree); | |
181 | } | |
182 | ||
183 | char * | |
184 | zfs_fuid_idx_domain(avl_tree_t *idx_tree, uint32_t idx) | |
185 | { | |
186 | fuid_domain_t searchnode, *findnode; | |
187 | avl_index_t loc; | |
188 | ||
189 | searchnode.f_idx = idx; | |
190 | ||
191 | findnode = avl_find(idx_tree, &searchnode, &loc); | |
192 | ||
b128c09f | 193 | return (findnode ? findnode->f_ksid->kd_name : nulldomain); |
34dc7c2f BB |
194 | } |
195 | ||
196 | #ifdef _KERNEL | |
197 | /* | |
198 | * Load the fuid table(s) into memory. | |
199 | */ | |
200 | static void | |
9babb374 | 201 | zfs_fuid_init(zfsvfs_t *zfsvfs) |
34dc7c2f | 202 | { |
34dc7c2f BB |
203 | rw_enter(&zfsvfs->z_fuid_lock, RW_WRITER); |
204 | ||
205 | if (zfsvfs->z_fuid_loaded) { | |
206 | rw_exit(&zfsvfs->z_fuid_lock); | |
207 | return; | |
208 | } | |
209 | ||
9babb374 | 210 | zfs_fuid_avl_tree_create(&zfsvfs->z_fuid_idx, &zfsvfs->z_fuid_domain); |
34dc7c2f | 211 | |
9babb374 BB |
212 | (void) zap_lookup(zfsvfs->z_os, MASTER_NODE_OBJ, |
213 | ZFS_FUID_TABLES, 8, 1, &zfsvfs->z_fuid_obj); | |
b128c09f BB |
214 | if (zfsvfs->z_fuid_obj != 0) { |
215 | zfsvfs->z_fuid_size = zfs_fuid_table_load(zfsvfs->z_os, | |
216 | zfsvfs->z_fuid_obj, &zfsvfs->z_fuid_idx, | |
217 | &zfsvfs->z_fuid_domain); | |
b128c09f | 218 | } |
34dc7c2f | 219 | |
9babb374 BB |
220 | zfsvfs->z_fuid_loaded = B_TRUE; |
221 | rw_exit(&zfsvfs->z_fuid_lock); | |
222 | } | |
223 | ||
224 | /* | |
225 | * sync out AVL trees to persistent storage. | |
226 | */ | |
227 | void | |
228 | zfs_fuid_sync(zfsvfs_t *zfsvfs, dmu_tx_t *tx) | |
229 | { | |
230 | nvlist_t *nvp; | |
231 | nvlist_t **fuids; | |
232 | size_t nvsize = 0; | |
233 | char *packed; | |
234 | dmu_buf_t *db; | |
235 | fuid_domain_t *domnode; | |
236 | int numnodes; | |
237 | int i; | |
238 | ||
239 | if (!zfsvfs->z_fuid_dirty) { | |
240 | return; | |
241 | } | |
242 | ||
243 | rw_enter(&zfsvfs->z_fuid_lock, RW_WRITER); | |
244 | ||
245 | /* | |
246 | * First see if table needs to be created? | |
247 | */ | |
248 | if (zfsvfs->z_fuid_obj == 0) { | |
249 | zfsvfs->z_fuid_obj = dmu_object_alloc(zfsvfs->z_os, | |
250 | DMU_OT_FUID, 1 << 14, DMU_OT_FUID_SIZE, | |
251 | sizeof (uint64_t), tx); | |
252 | VERIFY(zap_add(zfsvfs->z_os, MASTER_NODE_OBJ, | |
253 | ZFS_FUID_TABLES, sizeof (uint64_t), 1, | |
254 | &zfsvfs->z_fuid_obj, tx) == 0); | |
255 | } | |
256 | ||
257 | VERIFY(nvlist_alloc(&nvp, NV_UNIQUE_NAME, KM_SLEEP) == 0); | |
258 | ||
259 | numnodes = avl_numnodes(&zfsvfs->z_fuid_idx); | |
260 | fuids = kmem_alloc(numnodes * sizeof (void *), KM_SLEEP); | |
261 | for (i = 0, domnode = avl_first(&zfsvfs->z_fuid_domain); domnode; i++, | |
262 | domnode = AVL_NEXT(&zfsvfs->z_fuid_domain, domnode)) { | |
263 | VERIFY(nvlist_alloc(&fuids[i], NV_UNIQUE_NAME, KM_SLEEP) == 0); | |
264 | VERIFY(nvlist_add_uint64(fuids[i], FUID_IDX, | |
265 | domnode->f_idx) == 0); | |
266 | VERIFY(nvlist_add_uint64(fuids[i], FUID_OFFSET, 0) == 0); | |
267 | VERIFY(nvlist_add_string(fuids[i], FUID_DOMAIN, | |
268 | domnode->f_ksid->kd_name) == 0); | |
269 | } | |
270 | VERIFY(nvlist_add_nvlist_array(nvp, FUID_NVP_ARRAY, | |
271 | fuids, numnodes) == 0); | |
272 | for (i = 0; i != numnodes; i++) | |
273 | nvlist_free(fuids[i]); | |
274 | kmem_free(fuids, numnodes * sizeof (void *)); | |
275 | VERIFY(nvlist_size(nvp, &nvsize, NV_ENCODE_XDR) == 0); | |
276 | packed = kmem_alloc(nvsize, KM_SLEEP); | |
277 | VERIFY(nvlist_pack(nvp, &packed, &nvsize, | |
278 | NV_ENCODE_XDR, KM_SLEEP) == 0); | |
279 | nvlist_free(nvp); | |
280 | zfsvfs->z_fuid_size = nvsize; | |
281 | dmu_write(zfsvfs->z_os, zfsvfs->z_fuid_obj, 0, | |
282 | zfsvfs->z_fuid_size, packed, tx); | |
283 | kmem_free(packed, zfsvfs->z_fuid_size); | |
284 | VERIFY(0 == dmu_bonus_hold(zfsvfs->z_os, zfsvfs->z_fuid_obj, | |
285 | FTAG, &db)); | |
286 | dmu_buf_will_dirty(db, tx); | |
287 | *(uint64_t *)db->db_data = zfsvfs->z_fuid_size; | |
288 | dmu_buf_rele(db, FTAG); | |
289 | ||
290 | zfsvfs->z_fuid_dirty = B_FALSE; | |
34dc7c2f BB |
291 | rw_exit(&zfsvfs->z_fuid_lock); |
292 | } | |
293 | ||
294 | /* | |
295 | * Query domain table for a given domain. | |
296 | * | |
9babb374 BB |
297 | * If domain isn't found and addok is set, it is added to AVL trees and |
298 | * the zfsvfs->z_fuid_dirty flag will be set to TRUE. It will then be | |
299 | * necessary for the caller or another thread to detect the dirty table | |
300 | * and sync out the changes. | |
34dc7c2f BB |
301 | */ |
302 | int | |
9babb374 BB |
303 | zfs_fuid_find_by_domain(zfsvfs_t *zfsvfs, const char *domain, |
304 | char **retdomain, boolean_t addok) | |
34dc7c2f BB |
305 | { |
306 | fuid_domain_t searchnode, *findnode; | |
307 | avl_index_t loc; | |
b128c09f | 308 | krw_t rw = RW_READER; |
34dc7c2f BB |
309 | |
310 | /* | |
311 | * If the dummy "nobody" domain then return an index of 0 | |
312 | * to cause the created FUID to be a standard POSIX id | |
313 | * for the user nobody. | |
314 | */ | |
315 | if (domain[0] == '\0') { | |
9babb374 BB |
316 | if (retdomain) |
317 | *retdomain = nulldomain; | |
34dc7c2f BB |
318 | return (0); |
319 | } | |
320 | ||
321 | searchnode.f_ksid = ksid_lookupdomain(domain); | |
9babb374 | 322 | if (retdomain) |
34dc7c2f | 323 | *retdomain = searchnode.f_ksid->kd_name; |
34dc7c2f | 324 | if (!zfsvfs->z_fuid_loaded) |
9babb374 | 325 | zfs_fuid_init(zfsvfs); |
34dc7c2f | 326 | |
b128c09f BB |
327 | retry: |
328 | rw_enter(&zfsvfs->z_fuid_lock, rw); | |
34dc7c2f | 329 | findnode = avl_find(&zfsvfs->z_fuid_domain, &searchnode, &loc); |
34dc7c2f BB |
330 | |
331 | if (findnode) { | |
b128c09f | 332 | rw_exit(&zfsvfs->z_fuid_lock); |
34dc7c2f BB |
333 | ksiddomain_rele(searchnode.f_ksid); |
334 | return (findnode->f_idx); | |
9babb374 | 335 | } else if (addok) { |
34dc7c2f | 336 | fuid_domain_t *domnode; |
34dc7c2f | 337 | uint64_t retidx; |
34dc7c2f | 338 | |
b128c09f BB |
339 | if (rw == RW_READER && !rw_tryupgrade(&zfsvfs->z_fuid_lock)) { |
340 | rw_exit(&zfsvfs->z_fuid_lock); | |
341 | rw = RW_WRITER; | |
342 | goto retry; | |
343 | } | |
344 | ||
34dc7c2f BB |
345 | domnode = kmem_alloc(sizeof (fuid_domain_t), KM_SLEEP); |
346 | domnode->f_ksid = searchnode.f_ksid; | |
347 | ||
34dc7c2f BB |
348 | retidx = domnode->f_idx = avl_numnodes(&zfsvfs->z_fuid_idx) + 1; |
349 | ||
350 | avl_add(&zfsvfs->z_fuid_domain, domnode); | |
351 | avl_add(&zfsvfs->z_fuid_idx, domnode); | |
9babb374 | 352 | zfsvfs->z_fuid_dirty = B_TRUE; |
34dc7c2f BB |
353 | rw_exit(&zfsvfs->z_fuid_lock); |
354 | return (retidx); | |
9babb374 | 355 | } else { |
45d1cae3 | 356 | rw_exit(&zfsvfs->z_fuid_lock); |
9babb374 | 357 | return (-1); |
34dc7c2f BB |
358 | } |
359 | } | |
360 | ||
361 | /* | |
362 | * Query domain table by index, returning domain string | |
363 | * | |
364 | * Returns a pointer from an avl node of the domain string. | |
365 | * | |
366 | */ | |
9babb374 | 367 | const char * |
34dc7c2f BB |
368 | zfs_fuid_find_by_idx(zfsvfs_t *zfsvfs, uint32_t idx) |
369 | { | |
370 | char *domain; | |
371 | ||
372 | if (idx == 0 || !zfsvfs->z_use_fuids) | |
373 | return (NULL); | |
374 | ||
375 | if (!zfsvfs->z_fuid_loaded) | |
9babb374 | 376 | zfs_fuid_init(zfsvfs); |
34dc7c2f BB |
377 | |
378 | rw_enter(&zfsvfs->z_fuid_lock, RW_READER); | |
b128c09f BB |
379 | |
380 | if (zfsvfs->z_fuid_obj) | |
381 | domain = zfs_fuid_idx_domain(&zfsvfs->z_fuid_idx, idx); | |
382 | else | |
383 | domain = nulldomain; | |
34dc7c2f BB |
384 | rw_exit(&zfsvfs->z_fuid_lock); |
385 | ||
386 | ASSERT(domain); | |
387 | return (domain); | |
388 | } | |
389 | ||
390 | void | |
391 | zfs_fuid_map_ids(znode_t *zp, cred_t *cr, uid_t *uidp, uid_t *gidp) | |
392 | { | |
393 | *uidp = zfs_fuid_map_id(zp->z_zfsvfs, zp->z_phys->zp_uid, | |
394 | cr, ZFS_OWNER); | |
395 | *gidp = zfs_fuid_map_id(zp->z_zfsvfs, zp->z_phys->zp_gid, | |
396 | cr, ZFS_GROUP); | |
397 | } | |
398 | ||
399 | uid_t | |
400 | zfs_fuid_map_id(zfsvfs_t *zfsvfs, uint64_t fuid, | |
401 | cred_t *cr, zfs_fuid_type_t type) | |
402 | { | |
403 | uint32_t index = FUID_INDEX(fuid); | |
9babb374 | 404 | const char *domain; |
34dc7c2f BB |
405 | uid_t id; |
406 | ||
407 | if (index == 0) | |
408 | return (fuid); | |
409 | ||
410 | domain = zfs_fuid_find_by_idx(zfsvfs, index); | |
411 | ASSERT(domain != NULL); | |
412 | ||
413 | if (type == ZFS_OWNER || type == ZFS_ACE_USER) { | |
414 | (void) kidmap_getuidbysid(crgetzone(cr), domain, | |
415 | FUID_RID(fuid), &id); | |
416 | } else { | |
417 | (void) kidmap_getgidbysid(crgetzone(cr), domain, | |
418 | FUID_RID(fuid), &id); | |
419 | } | |
420 | return (id); | |
421 | } | |
422 | ||
423 | /* | |
424 | * Add a FUID node to the list of fuid's being created for this | |
425 | * ACL | |
426 | * | |
427 | * If ACL has multiple domains, then keep only one copy of each unique | |
428 | * domain. | |
429 | */ | |
430 | static void | |
431 | zfs_fuid_node_add(zfs_fuid_info_t **fuidpp, const char *domain, uint32_t rid, | |
432 | uint64_t idx, uint64_t id, zfs_fuid_type_t type) | |
433 | { | |
434 | zfs_fuid_t *fuid; | |
435 | zfs_fuid_domain_t *fuid_domain; | |
436 | zfs_fuid_info_t *fuidp; | |
437 | uint64_t fuididx; | |
438 | boolean_t found = B_FALSE; | |
439 | ||
440 | if (*fuidpp == NULL) | |
441 | *fuidpp = zfs_fuid_info_alloc(); | |
442 | ||
443 | fuidp = *fuidpp; | |
444 | /* | |
445 | * First find fuid domain index in linked list | |
446 | * | |
447 | * If one isn't found then create an entry. | |
448 | */ | |
449 | ||
450 | for (fuididx = 1, fuid_domain = list_head(&fuidp->z_domains); | |
451 | fuid_domain; fuid_domain = list_next(&fuidp->z_domains, | |
452 | fuid_domain), fuididx++) { | |
453 | if (idx == fuid_domain->z_domidx) { | |
454 | found = B_TRUE; | |
455 | break; | |
456 | } | |
457 | } | |
458 | ||
459 | if (!found) { | |
460 | fuid_domain = kmem_alloc(sizeof (zfs_fuid_domain_t), KM_SLEEP); | |
461 | fuid_domain->z_domain = domain; | |
462 | fuid_domain->z_domidx = idx; | |
463 | list_insert_tail(&fuidp->z_domains, fuid_domain); | |
464 | fuidp->z_domain_str_sz += strlen(domain) + 1; | |
465 | fuidp->z_domain_cnt++; | |
466 | } | |
467 | ||
468 | if (type == ZFS_ACE_USER || type == ZFS_ACE_GROUP) { | |
9babb374 | 469 | |
34dc7c2f BB |
470 | /* |
471 | * Now allocate fuid entry and add it on the end of the list | |
472 | */ | |
473 | ||
474 | fuid = kmem_alloc(sizeof (zfs_fuid_t), KM_SLEEP); | |
475 | fuid->z_id = id; | |
476 | fuid->z_domidx = idx; | |
477 | fuid->z_logfuid = FUID_ENCODE(fuididx, rid); | |
478 | ||
479 | list_insert_tail(&fuidp->z_fuids, fuid); | |
480 | fuidp->z_fuid_cnt++; | |
481 | } else { | |
482 | if (type == ZFS_OWNER) | |
483 | fuidp->z_fuid_owner = FUID_ENCODE(fuididx, rid); | |
484 | else | |
485 | fuidp->z_fuid_group = FUID_ENCODE(fuididx, rid); | |
486 | } | |
487 | } | |
488 | ||
489 | /* | |
490 | * Create a file system FUID, based on information in the users cred | |
491 | */ | |
492 | uint64_t | |
493 | zfs_fuid_create_cred(zfsvfs_t *zfsvfs, zfs_fuid_type_t type, | |
9babb374 | 494 | cred_t *cr, zfs_fuid_info_t **fuidp) |
34dc7c2f BB |
495 | { |
496 | uint64_t idx; | |
497 | ksid_t *ksid; | |
498 | uint32_t rid; | |
499 | char *kdomain; | |
500 | const char *domain; | |
501 | uid_t id; | |
502 | ||
503 | VERIFY(type == ZFS_OWNER || type == ZFS_GROUP); | |
504 | ||
b128c09f BB |
505 | ksid = crgetsid(cr, (type == ZFS_OWNER) ? KSID_OWNER : KSID_GROUP); |
506 | if (ksid) { | |
507 | id = ksid_getid(ksid); | |
508 | } else { | |
509 | if (type == ZFS_OWNER) | |
510 | id = crgetuid(cr); | |
511 | else | |
512 | id = crgetgid(cr); | |
513 | } | |
34dc7c2f | 514 | |
b128c09f | 515 | if (!zfsvfs->z_use_fuids || (!IS_EPHEMERAL(id))) |
34dc7c2f BB |
516 | return ((uint64_t)id); |
517 | ||
34dc7c2f BB |
518 | rid = ksid_getrid(ksid); |
519 | domain = ksid_getdomain(ksid); | |
520 | ||
9babb374 | 521 | idx = zfs_fuid_find_by_domain(zfsvfs, domain, &kdomain, B_TRUE); |
34dc7c2f BB |
522 | |
523 | zfs_fuid_node_add(fuidp, kdomain, rid, idx, id, type); | |
524 | ||
525 | return (FUID_ENCODE(idx, rid)); | |
526 | } | |
527 | ||
528 | /* | |
529 | * Create a file system FUID for an ACL ace | |
530 | * or a chown/chgrp of the file. | |
531 | * This is similar to zfs_fuid_create_cred, except that | |
532 | * we can't find the domain + rid information in the | |
533 | * cred. Instead we have to query Winchester for the | |
534 | * domain and rid. | |
535 | * | |
536 | * During replay operations the domain+rid information is | |
537 | * found in the zfs_fuid_info_t that the replay code has | |
538 | * attached to the zfsvfs of the file system. | |
539 | */ | |
540 | uint64_t | |
541 | zfs_fuid_create(zfsvfs_t *zfsvfs, uint64_t id, cred_t *cr, | |
9babb374 | 542 | zfs_fuid_type_t type, zfs_fuid_info_t **fuidpp) |
34dc7c2f BB |
543 | { |
544 | const char *domain; | |
545 | char *kdomain; | |
546 | uint32_t fuid_idx = FUID_INDEX(id); | |
547 | uint32_t rid; | |
548 | idmap_stat status; | |
549 | uint64_t idx; | |
34dc7c2f BB |
550 | zfs_fuid_t *zfuid = NULL; |
551 | zfs_fuid_info_t *fuidp; | |
552 | ||
553 | /* | |
554 | * If POSIX ID, or entry is already a FUID then | |
555 | * just return the id | |
556 | * | |
557 | * We may also be handed an already FUID'ized id via | |
558 | * chmod. | |
559 | */ | |
560 | ||
561 | if (!zfsvfs->z_use_fuids || !IS_EPHEMERAL(id) || fuid_idx != 0) | |
562 | return (id); | |
563 | ||
fb5f0bc8 | 564 | if (zfsvfs->z_replay) { |
34dc7c2f BB |
565 | fuidp = zfsvfs->z_fuid_replay; |
566 | ||
567 | /* | |
568 | * If we are passed an ephemeral id, but no | |
569 | * fuid_info was logged then return NOBODY. | |
570 | * This is most likely a result of idmap service | |
571 | * not being available. | |
572 | */ | |
573 | if (fuidp == NULL) | |
574 | return (UID_NOBODY); | |
575 | ||
576 | switch (type) { | |
577 | case ZFS_ACE_USER: | |
578 | case ZFS_ACE_GROUP: | |
579 | zfuid = list_head(&fuidp->z_fuids); | |
580 | rid = FUID_RID(zfuid->z_logfuid); | |
581 | idx = FUID_INDEX(zfuid->z_logfuid); | |
582 | break; | |
583 | case ZFS_OWNER: | |
584 | rid = FUID_RID(fuidp->z_fuid_owner); | |
585 | idx = FUID_INDEX(fuidp->z_fuid_owner); | |
586 | break; | |
587 | case ZFS_GROUP: | |
588 | rid = FUID_RID(fuidp->z_fuid_group); | |
589 | idx = FUID_INDEX(fuidp->z_fuid_group); | |
590 | break; | |
591 | }; | |
592 | domain = fuidp->z_domain_table[idx -1]; | |
593 | } else { | |
594 | if (type == ZFS_OWNER || type == ZFS_ACE_USER) | |
595 | status = kidmap_getsidbyuid(crgetzone(cr), id, | |
596 | &domain, &rid); | |
597 | else | |
598 | status = kidmap_getsidbygid(crgetzone(cr), id, | |
599 | &domain, &rid); | |
600 | ||
601 | if (status != 0) { | |
602 | /* | |
603 | * When returning nobody we will need to | |
604 | * make a dummy fuid table entry for logging | |
605 | * purposes. | |
606 | */ | |
607 | rid = UID_NOBODY; | |
b128c09f | 608 | domain = nulldomain; |
34dc7c2f BB |
609 | } |
610 | } | |
611 | ||
9babb374 | 612 | idx = zfs_fuid_find_by_domain(zfsvfs, domain, &kdomain, B_TRUE); |
34dc7c2f | 613 | |
fb5f0bc8 | 614 | if (!zfsvfs->z_replay) |
9babb374 BB |
615 | zfs_fuid_node_add(fuidpp, kdomain, |
616 | rid, idx, id, type); | |
34dc7c2f BB |
617 | else if (zfuid != NULL) { |
618 | list_remove(&fuidp->z_fuids, zfuid); | |
619 | kmem_free(zfuid, sizeof (zfs_fuid_t)); | |
620 | } | |
621 | return (FUID_ENCODE(idx, rid)); | |
622 | } | |
623 | ||
624 | void | |
625 | zfs_fuid_destroy(zfsvfs_t *zfsvfs) | |
626 | { | |
627 | rw_enter(&zfsvfs->z_fuid_lock, RW_WRITER); | |
628 | if (!zfsvfs->z_fuid_loaded) { | |
629 | rw_exit(&zfsvfs->z_fuid_lock); | |
630 | return; | |
631 | } | |
632 | zfs_fuid_table_destroy(&zfsvfs->z_fuid_idx, &zfsvfs->z_fuid_domain); | |
633 | rw_exit(&zfsvfs->z_fuid_lock); | |
634 | } | |
635 | ||
636 | /* | |
637 | * Allocate zfs_fuid_info for tracking FUIDs created during | |
638 | * zfs_mknode, VOP_SETATTR() or VOP_SETSECATTR() | |
639 | */ | |
640 | zfs_fuid_info_t * | |
641 | zfs_fuid_info_alloc(void) | |
642 | { | |
643 | zfs_fuid_info_t *fuidp; | |
644 | ||
645 | fuidp = kmem_zalloc(sizeof (zfs_fuid_info_t), KM_SLEEP); | |
646 | list_create(&fuidp->z_domains, sizeof (zfs_fuid_domain_t), | |
647 | offsetof(zfs_fuid_domain_t, z_next)); | |
648 | list_create(&fuidp->z_fuids, sizeof (zfs_fuid_t), | |
649 | offsetof(zfs_fuid_t, z_next)); | |
650 | return (fuidp); | |
651 | } | |
652 | ||
653 | /* | |
654 | * Release all memory associated with zfs_fuid_info_t | |
655 | */ | |
656 | void | |
657 | zfs_fuid_info_free(zfs_fuid_info_t *fuidp) | |
658 | { | |
659 | zfs_fuid_t *zfuid; | |
660 | zfs_fuid_domain_t *zdomain; | |
661 | ||
662 | while ((zfuid = list_head(&fuidp->z_fuids)) != NULL) { | |
663 | list_remove(&fuidp->z_fuids, zfuid); | |
664 | kmem_free(zfuid, sizeof (zfs_fuid_t)); | |
665 | } | |
666 | ||
667 | if (fuidp->z_domain_table != NULL) | |
668 | kmem_free(fuidp->z_domain_table, | |
669 | (sizeof (char **)) * fuidp->z_domain_cnt); | |
670 | ||
671 | while ((zdomain = list_head(&fuidp->z_domains)) != NULL) { | |
672 | list_remove(&fuidp->z_domains, zdomain); | |
673 | kmem_free(zdomain, sizeof (zfs_fuid_domain_t)); | |
674 | } | |
675 | ||
676 | kmem_free(fuidp, sizeof (zfs_fuid_info_t)); | |
677 | } | |
678 | ||
679 | /* | |
680 | * Check to see if id is a groupmember. If cred | |
681 | * has ksid info then sidlist is checked first | |
682 | * and if still not found then POSIX groups are checked | |
683 | * | |
684 | * Will use a straight FUID compare when possible. | |
685 | */ | |
686 | boolean_t | |
687 | zfs_groupmember(zfsvfs_t *zfsvfs, uint64_t id, cred_t *cr) | |
688 | { | |
689 | ksid_t *ksid = crgetsid(cr, KSID_GROUP); | |
9babb374 | 690 | ksidlist_t *ksidlist = crgetsidlist(cr); |
34dc7c2f BB |
691 | uid_t gid; |
692 | ||
9babb374 | 693 | if (ksid && ksidlist) { |
34dc7c2f BB |
694 | int i; |
695 | ksid_t *ksid_groups; | |
34dc7c2f BB |
696 | uint32_t idx = FUID_INDEX(id); |
697 | uint32_t rid = FUID_RID(id); | |
698 | ||
34dc7c2f BB |
699 | ksid_groups = ksidlist->ksl_sids; |
700 | ||
701 | for (i = 0; i != ksidlist->ksl_nsid; i++) { | |
702 | if (idx == 0) { | |
703 | if (id != IDMAP_WK_CREATOR_GROUP_GID && | |
704 | id == ksid_groups[i].ks_id) { | |
705 | return (B_TRUE); | |
706 | } | |
707 | } else { | |
9babb374 | 708 | const char *domain; |
34dc7c2f BB |
709 | |
710 | domain = zfs_fuid_find_by_idx(zfsvfs, idx); | |
711 | ASSERT(domain != NULL); | |
712 | ||
713 | if (strcmp(domain, | |
714 | IDMAP_WK_CREATOR_SID_AUTHORITY) == 0) | |
715 | return (B_FALSE); | |
716 | ||
717 | if ((strcmp(domain, | |
718 | ksid_groups[i].ks_domain->kd_name) == 0) && | |
719 | rid == ksid_groups[i].ks_rid) | |
720 | return (B_TRUE); | |
721 | } | |
722 | } | |
723 | } | |
724 | ||
725 | /* | |
726 | * Not found in ksidlist, check posix groups | |
727 | */ | |
728 | gid = zfs_fuid_map_id(zfsvfs, id, cr, ZFS_GROUP); | |
729 | return (groupmember(gid, cr)); | |
730 | } | |
9babb374 BB |
731 | |
732 | void | |
733 | zfs_fuid_txhold(zfsvfs_t *zfsvfs, dmu_tx_t *tx) | |
734 | { | |
735 | if (zfsvfs->z_fuid_obj == 0) { | |
736 | dmu_tx_hold_bonus(tx, DMU_NEW_OBJECT); | |
737 | dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, | |
738 | FUID_SIZE_ESTIMATE(zfsvfs)); | |
739 | dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, FALSE, NULL); | |
740 | } else { | |
741 | dmu_tx_hold_bonus(tx, zfsvfs->z_fuid_obj); | |
742 | dmu_tx_hold_write(tx, zfsvfs->z_fuid_obj, 0, | |
743 | FUID_SIZE_ESTIMATE(zfsvfs)); | |
744 | } | |
745 | } | |
34dc7c2f | 746 | #endif |