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70e083d2 TG |
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 | /* | |
22 | * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved. | |
23 | */ | |
24 | ||
25 | #include <sys/zfs_context.h> | |
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 | |
32 | #include <sys/kidmap.h> | |
33 | #include <sys/sid.h> | |
34 | #include <sys/zfs_vfsops.h> | |
35 | #include <sys/zfs_znode.h> | |
36 | #endif | |
37 | #include <sys/zfs_fuid.h> | |
38 | ||
39 | /* | |
40 | * FUID Domain table(s). | |
41 | * | |
42 | * The FUID table is stored as a packed nvlist of an array | |
43 | * of nvlists which contain an index, domain string and offset | |
44 | * | |
45 | * During file system initialization the nvlist(s) are read and | |
46 | * two AVL trees are created. One tree is keyed by the index number | |
47 | * and the other by the domain string. Nodes are never removed from | |
48 | * trees, but new entries may be added. If a new entry is added then | |
86e3c28a | 49 | * the zfsvfs->z_fuid_dirty flag is set to true and the caller will then |
70e083d2 TG |
50 | * be responsible for calling zfs_fuid_sync() to sync the changes to disk. |
51 | * | |
52 | */ | |
53 | ||
54 | #define FUID_IDX "fuid_idx" | |
55 | #define FUID_DOMAIN "fuid_domain" | |
56 | #define FUID_OFFSET "fuid_offset" | |
57 | #define FUID_NVP_ARRAY "fuid_nvlist" | |
58 | ||
59 | typedef struct fuid_domain { | |
60 | avl_node_t f_domnode; | |
61 | avl_node_t f_idxnode; | |
62 | ksiddomain_t *f_ksid; | |
63 | uint64_t f_idx; | |
64 | } fuid_domain_t; | |
65 | ||
66 | static char *nulldomain = ""; | |
67 | ||
68 | /* | |
69 | * Compare two indexes. | |
70 | */ | |
71 | static int | |
72 | idx_compare(const void *arg1, const void *arg2) | |
73 | { | |
86e3c28a CIK |
74 | const fuid_domain_t *node1 = (const fuid_domain_t *)arg1; |
75 | const fuid_domain_t *node2 = (const fuid_domain_t *)arg2; | |
70e083d2 | 76 | |
86e3c28a | 77 | return (AVL_CMP(node1->f_idx, node2->f_idx)); |
70e083d2 TG |
78 | } |
79 | ||
80 | /* | |
81 | * Compare two domain strings. | |
82 | */ | |
83 | static int | |
84 | domain_compare(const void *arg1, const void *arg2) | |
85 | { | |
86e3c28a CIK |
86 | const fuid_domain_t *node1 = (const fuid_domain_t *)arg1; |
87 | const fuid_domain_t *node2 = (const fuid_domain_t *)arg2; | |
70e083d2 TG |
88 | int val; |
89 | ||
90 | val = strcmp(node1->f_ksid->kd_name, node2->f_ksid->kd_name); | |
86e3c28a CIK |
91 | |
92 | return (AVL_ISIGN(val)); | |
70e083d2 TG |
93 | } |
94 | ||
95 | void | |
96 | zfs_fuid_avl_tree_create(avl_tree_t *idx_tree, avl_tree_t *domain_tree) | |
97 | { | |
98 | avl_create(idx_tree, idx_compare, | |
99 | sizeof (fuid_domain_t), offsetof(fuid_domain_t, f_idxnode)); | |
100 | avl_create(domain_tree, domain_compare, | |
101 | sizeof (fuid_domain_t), offsetof(fuid_domain_t, f_domnode)); | |
102 | } | |
103 | ||
104 | /* | |
105 | * load initial fuid domain and idx trees. This function is used by | |
106 | * both the kernel and zdb. | |
107 | */ | |
108 | uint64_t | |
109 | zfs_fuid_table_load(objset_t *os, uint64_t fuid_obj, avl_tree_t *idx_tree, | |
110 | avl_tree_t *domain_tree) | |
111 | { | |
112 | dmu_buf_t *db; | |
113 | uint64_t fuid_size; | |
114 | ||
115 | ASSERT(fuid_obj != 0); | |
116 | VERIFY(0 == dmu_bonus_hold(os, fuid_obj, | |
117 | FTAG, &db)); | |
118 | fuid_size = *(uint64_t *)db->db_data; | |
119 | dmu_buf_rele(db, FTAG); | |
120 | ||
121 | if (fuid_size) { | |
122 | nvlist_t **fuidnvp; | |
123 | nvlist_t *nvp = NULL; | |
124 | uint_t count; | |
125 | char *packed; | |
126 | int i; | |
127 | ||
128 | packed = kmem_alloc(fuid_size, KM_SLEEP); | |
129 | VERIFY(dmu_read(os, fuid_obj, 0, | |
130 | fuid_size, packed, DMU_READ_PREFETCH) == 0); | |
131 | VERIFY(nvlist_unpack(packed, fuid_size, | |
132 | &nvp, 0) == 0); | |
133 | VERIFY(nvlist_lookup_nvlist_array(nvp, FUID_NVP_ARRAY, | |
134 | &fuidnvp, &count) == 0); | |
135 | ||
136 | for (i = 0; i != count; i++) { | |
137 | fuid_domain_t *domnode; | |
138 | char *domain; | |
139 | uint64_t idx; | |
140 | ||
141 | VERIFY(nvlist_lookup_string(fuidnvp[i], FUID_DOMAIN, | |
142 | &domain) == 0); | |
143 | VERIFY(nvlist_lookup_uint64(fuidnvp[i], FUID_IDX, | |
144 | &idx) == 0); | |
145 | ||
146 | domnode = kmem_alloc(sizeof (fuid_domain_t), KM_SLEEP); | |
147 | ||
148 | domnode->f_idx = idx; | |
149 | domnode->f_ksid = ksid_lookupdomain(domain); | |
150 | avl_add(idx_tree, domnode); | |
151 | avl_add(domain_tree, domnode); | |
152 | } | |
153 | nvlist_free(nvp); | |
154 | kmem_free(packed, fuid_size); | |
155 | } | |
156 | return (fuid_size); | |
157 | } | |
158 | ||
159 | void | |
160 | zfs_fuid_table_destroy(avl_tree_t *idx_tree, avl_tree_t *domain_tree) | |
161 | { | |
162 | fuid_domain_t *domnode; | |
163 | void *cookie; | |
164 | ||
165 | cookie = NULL; | |
166 | while ((domnode = avl_destroy_nodes(domain_tree, &cookie))) | |
167 | ksiddomain_rele(domnode->f_ksid); | |
168 | ||
169 | avl_destroy(domain_tree); | |
170 | cookie = NULL; | |
171 | while ((domnode = avl_destroy_nodes(idx_tree, &cookie))) | |
172 | kmem_free(domnode, sizeof (fuid_domain_t)); | |
173 | avl_destroy(idx_tree); | |
174 | } | |
175 | ||
176 | char * | |
177 | zfs_fuid_idx_domain(avl_tree_t *idx_tree, uint32_t idx) | |
178 | { | |
179 | fuid_domain_t searchnode, *findnode; | |
180 | avl_index_t loc; | |
181 | ||
182 | searchnode.f_idx = idx; | |
183 | ||
184 | findnode = avl_find(idx_tree, &searchnode, &loc); | |
185 | ||
186 | return (findnode ? findnode->f_ksid->kd_name : nulldomain); | |
187 | } | |
188 | ||
189 | #ifdef _KERNEL | |
190 | /* | |
191 | * Load the fuid table(s) into memory. | |
192 | */ | |
193 | static void | |
86e3c28a | 194 | zfs_fuid_init(zfsvfs_t *zfsvfs) |
70e083d2 | 195 | { |
86e3c28a | 196 | rw_enter(&zfsvfs->z_fuid_lock, RW_WRITER); |
70e083d2 | 197 | |
86e3c28a CIK |
198 | if (zfsvfs->z_fuid_loaded) { |
199 | rw_exit(&zfsvfs->z_fuid_lock); | |
70e083d2 TG |
200 | return; |
201 | } | |
202 | ||
86e3c28a | 203 | zfs_fuid_avl_tree_create(&zfsvfs->z_fuid_idx, &zfsvfs->z_fuid_domain); |
70e083d2 | 204 | |
86e3c28a CIK |
205 | (void) zap_lookup(zfsvfs->z_os, MASTER_NODE_OBJ, |
206 | ZFS_FUID_TABLES, 8, 1, &zfsvfs->z_fuid_obj); | |
207 | if (zfsvfs->z_fuid_obj != 0) { | |
208 | zfsvfs->z_fuid_size = zfs_fuid_table_load(zfsvfs->z_os, | |
209 | zfsvfs->z_fuid_obj, &zfsvfs->z_fuid_idx, | |
210 | &zfsvfs->z_fuid_domain); | |
70e083d2 TG |
211 | } |
212 | ||
86e3c28a CIK |
213 | zfsvfs->z_fuid_loaded = B_TRUE; |
214 | rw_exit(&zfsvfs->z_fuid_lock); | |
70e083d2 TG |
215 | } |
216 | ||
217 | /* | |
218 | * sync out AVL trees to persistent storage. | |
219 | */ | |
220 | void | |
86e3c28a | 221 | zfs_fuid_sync(zfsvfs_t *zfsvfs, dmu_tx_t *tx) |
70e083d2 TG |
222 | { |
223 | nvlist_t *nvp; | |
224 | nvlist_t **fuids; | |
225 | size_t nvsize = 0; | |
226 | char *packed; | |
227 | dmu_buf_t *db; | |
228 | fuid_domain_t *domnode; | |
229 | int numnodes; | |
230 | int i; | |
231 | ||
86e3c28a | 232 | if (!zfsvfs->z_fuid_dirty) { |
70e083d2 TG |
233 | return; |
234 | } | |
235 | ||
86e3c28a | 236 | rw_enter(&zfsvfs->z_fuid_lock, RW_WRITER); |
70e083d2 TG |
237 | |
238 | /* | |
239 | * First see if table needs to be created? | |
240 | */ | |
86e3c28a CIK |
241 | if (zfsvfs->z_fuid_obj == 0) { |
242 | zfsvfs->z_fuid_obj = dmu_object_alloc(zfsvfs->z_os, | |
70e083d2 TG |
243 | DMU_OT_FUID, 1 << 14, DMU_OT_FUID_SIZE, |
244 | sizeof (uint64_t), tx); | |
86e3c28a | 245 | VERIFY(zap_add(zfsvfs->z_os, MASTER_NODE_OBJ, |
70e083d2 | 246 | ZFS_FUID_TABLES, sizeof (uint64_t), 1, |
86e3c28a | 247 | &zfsvfs->z_fuid_obj, tx) == 0); |
70e083d2 TG |
248 | } |
249 | ||
250 | VERIFY(nvlist_alloc(&nvp, NV_UNIQUE_NAME, KM_SLEEP) == 0); | |
251 | ||
86e3c28a | 252 | numnodes = avl_numnodes(&zfsvfs->z_fuid_idx); |
70e083d2 | 253 | fuids = kmem_alloc(numnodes * sizeof (void *), KM_SLEEP); |
86e3c28a CIK |
254 | for (i = 0, domnode = avl_first(&zfsvfs->z_fuid_domain); domnode; i++, |
255 | domnode = AVL_NEXT(&zfsvfs->z_fuid_domain, domnode)) { | |
70e083d2 TG |
256 | VERIFY(nvlist_alloc(&fuids[i], NV_UNIQUE_NAME, KM_SLEEP) == 0); |
257 | VERIFY(nvlist_add_uint64(fuids[i], FUID_IDX, | |
258 | domnode->f_idx) == 0); | |
259 | VERIFY(nvlist_add_uint64(fuids[i], FUID_OFFSET, 0) == 0); | |
260 | VERIFY(nvlist_add_string(fuids[i], FUID_DOMAIN, | |
261 | domnode->f_ksid->kd_name) == 0); | |
262 | } | |
263 | VERIFY(nvlist_add_nvlist_array(nvp, FUID_NVP_ARRAY, | |
264 | fuids, numnodes) == 0); | |
265 | for (i = 0; i != numnodes; i++) | |
266 | nvlist_free(fuids[i]); | |
267 | kmem_free(fuids, numnodes * sizeof (void *)); | |
268 | VERIFY(nvlist_size(nvp, &nvsize, NV_ENCODE_XDR) == 0); | |
269 | packed = kmem_alloc(nvsize, KM_SLEEP); | |
270 | VERIFY(nvlist_pack(nvp, &packed, &nvsize, | |
271 | NV_ENCODE_XDR, KM_SLEEP) == 0); | |
272 | nvlist_free(nvp); | |
86e3c28a CIK |
273 | zfsvfs->z_fuid_size = nvsize; |
274 | dmu_write(zfsvfs->z_os, zfsvfs->z_fuid_obj, 0, | |
275 | zfsvfs->z_fuid_size, packed, tx); | |
276 | kmem_free(packed, zfsvfs->z_fuid_size); | |
277 | VERIFY(0 == dmu_bonus_hold(zfsvfs->z_os, zfsvfs->z_fuid_obj, | |
70e083d2 TG |
278 | FTAG, &db)); |
279 | dmu_buf_will_dirty(db, tx); | |
86e3c28a | 280 | *(uint64_t *)db->db_data = zfsvfs->z_fuid_size; |
70e083d2 TG |
281 | dmu_buf_rele(db, FTAG); |
282 | ||
86e3c28a CIK |
283 | zfsvfs->z_fuid_dirty = B_FALSE; |
284 | rw_exit(&zfsvfs->z_fuid_lock); | |
70e083d2 TG |
285 | } |
286 | ||
287 | /* | |
288 | * Query domain table for a given domain. | |
289 | * | |
290 | * If domain isn't found and addok is set, it is added to AVL trees and | |
86e3c28a | 291 | * the zfsvfs->z_fuid_dirty flag will be set to TRUE. It will then be |
70e083d2 TG |
292 | * necessary for the caller or another thread to detect the dirty table |
293 | * and sync out the changes. | |
294 | */ | |
295 | int | |
86e3c28a | 296 | zfs_fuid_find_by_domain(zfsvfs_t *zfsvfs, const char *domain, |
70e083d2 TG |
297 | char **retdomain, boolean_t addok) |
298 | { | |
299 | fuid_domain_t searchnode, *findnode; | |
300 | avl_index_t loc; | |
301 | krw_t rw = RW_READER; | |
302 | ||
303 | /* | |
304 | * If the dummy "nobody" domain then return an index of 0 | |
305 | * to cause the created FUID to be a standard POSIX id | |
306 | * for the user nobody. | |
307 | */ | |
308 | if (domain[0] == '\0') { | |
309 | if (retdomain) | |
310 | *retdomain = nulldomain; | |
311 | return (0); | |
312 | } | |
313 | ||
314 | searchnode.f_ksid = ksid_lookupdomain(domain); | |
315 | if (retdomain) | |
316 | *retdomain = searchnode.f_ksid->kd_name; | |
86e3c28a CIK |
317 | if (!zfsvfs->z_fuid_loaded) |
318 | zfs_fuid_init(zfsvfs); | |
70e083d2 TG |
319 | |
320 | retry: | |
86e3c28a CIK |
321 | rw_enter(&zfsvfs->z_fuid_lock, rw); |
322 | findnode = avl_find(&zfsvfs->z_fuid_domain, &searchnode, &loc); | |
70e083d2 TG |
323 | |
324 | if (findnode) { | |
86e3c28a | 325 | rw_exit(&zfsvfs->z_fuid_lock); |
70e083d2 TG |
326 | ksiddomain_rele(searchnode.f_ksid); |
327 | return (findnode->f_idx); | |
328 | } else if (addok) { | |
329 | fuid_domain_t *domnode; | |
330 | uint64_t retidx; | |
331 | ||
86e3c28a CIK |
332 | if (rw == RW_READER && !rw_tryupgrade(&zfsvfs->z_fuid_lock)) { |
333 | rw_exit(&zfsvfs->z_fuid_lock); | |
70e083d2 TG |
334 | rw = RW_WRITER; |
335 | goto retry; | |
336 | } | |
337 | ||
338 | domnode = kmem_alloc(sizeof (fuid_domain_t), KM_SLEEP); | |
339 | domnode->f_ksid = searchnode.f_ksid; | |
340 | ||
86e3c28a | 341 | retidx = domnode->f_idx = avl_numnodes(&zfsvfs->z_fuid_idx) + 1; |
70e083d2 | 342 | |
86e3c28a CIK |
343 | avl_add(&zfsvfs->z_fuid_domain, domnode); |
344 | avl_add(&zfsvfs->z_fuid_idx, domnode); | |
345 | zfsvfs->z_fuid_dirty = B_TRUE; | |
346 | rw_exit(&zfsvfs->z_fuid_lock); | |
70e083d2 TG |
347 | return (retidx); |
348 | } else { | |
86e3c28a | 349 | rw_exit(&zfsvfs->z_fuid_lock); |
70e083d2 TG |
350 | return (-1); |
351 | } | |
352 | } | |
353 | ||
354 | /* | |
355 | * Query domain table by index, returning domain string | |
356 | * | |
357 | * Returns a pointer from an avl node of the domain string. | |
358 | * | |
359 | */ | |
360 | const char * | |
86e3c28a | 361 | zfs_fuid_find_by_idx(zfsvfs_t *zfsvfs, uint32_t idx) |
70e083d2 TG |
362 | { |
363 | char *domain; | |
364 | ||
86e3c28a | 365 | if (idx == 0 || !zfsvfs->z_use_fuids) |
70e083d2 TG |
366 | return (NULL); |
367 | ||
86e3c28a CIK |
368 | if (!zfsvfs->z_fuid_loaded) |
369 | zfs_fuid_init(zfsvfs); | |
70e083d2 | 370 | |
86e3c28a | 371 | rw_enter(&zfsvfs->z_fuid_lock, RW_READER); |
70e083d2 | 372 | |
86e3c28a CIK |
373 | if (zfsvfs->z_fuid_obj || zfsvfs->z_fuid_dirty) |
374 | domain = zfs_fuid_idx_domain(&zfsvfs->z_fuid_idx, idx); | |
70e083d2 TG |
375 | else |
376 | domain = nulldomain; | |
86e3c28a | 377 | rw_exit(&zfsvfs->z_fuid_lock); |
70e083d2 TG |
378 | |
379 | ASSERT(domain); | |
380 | return (domain); | |
381 | } | |
382 | ||
383 | void | |
384 | zfs_fuid_map_ids(znode_t *zp, cred_t *cr, uid_t *uidp, uid_t *gidp) | |
385 | { | |
86e3c28a CIK |
386 | *uidp = zfs_fuid_map_id(ZTOZSB(zp), KUID_TO_SUID(ZTOI(zp)->i_uid), |
387 | cr, ZFS_OWNER); | |
388 | *gidp = zfs_fuid_map_id(ZTOZSB(zp), KGID_TO_SGID(ZTOI(zp)->i_gid), | |
389 | cr, ZFS_GROUP); | |
70e083d2 TG |
390 | } |
391 | ||
392 | uid_t | |
86e3c28a | 393 | zfs_fuid_map_id(zfsvfs_t *zfsvfs, uint64_t fuid, |
70e083d2 TG |
394 | cred_t *cr, zfs_fuid_type_t type) |
395 | { | |
396 | #ifdef HAVE_KSID | |
397 | uint32_t index = FUID_INDEX(fuid); | |
398 | const char *domain; | |
399 | uid_t id; | |
400 | ||
401 | if (index == 0) | |
402 | return (fuid); | |
403 | ||
86e3c28a | 404 | domain = zfs_fuid_find_by_idx(zfsvfs, index); |
70e083d2 TG |
405 | ASSERT(domain != NULL); |
406 | ||
407 | if (type == ZFS_OWNER || type == ZFS_ACE_USER) { | |
408 | (void) kidmap_getuidbysid(crgetzone(cr), domain, | |
409 | FUID_RID(fuid), &id); | |
410 | } else { | |
411 | (void) kidmap_getgidbysid(crgetzone(cr), domain, | |
412 | FUID_RID(fuid), &id); | |
413 | } | |
414 | return (id); | |
415 | #else | |
416 | /* | |
417 | * The Linux port only supports POSIX IDs, use the passed id. | |
418 | */ | |
419 | return (fuid); | |
420 | #endif /* HAVE_KSID */ | |
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 | 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) { | |
469 | ||
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 | #ifdef HAVE_KSID | |
490 | /* | |
491 | * Create a file system FUID, based on information in the users cred | |
492 | * | |
493 | * If cred contains KSID_OWNER then it should be used to determine | |
494 | * the uid otherwise cred's uid will be used. By default cred's gid | |
495 | * is used unless it's an ephemeral ID in which case KSID_GROUP will | |
496 | * be used if it exists. | |
497 | */ | |
498 | uint64_t | |
86e3c28a | 499 | zfs_fuid_create_cred(zfsvfs_t *zfsvfs, zfs_fuid_type_t type, |
70e083d2 TG |
500 | cred_t *cr, zfs_fuid_info_t **fuidp) |
501 | { | |
502 | uint64_t idx; | |
503 | ksid_t *ksid; | |
504 | uint32_t rid; | |
505 | char *kdomain; | |
506 | const char *domain; | |
507 | uid_t id; | |
508 | ||
509 | VERIFY(type == ZFS_OWNER || type == ZFS_GROUP); | |
510 | ||
511 | ksid = crgetsid(cr, (type == ZFS_OWNER) ? KSID_OWNER : KSID_GROUP); | |
512 | ||
86e3c28a | 513 | if (!zfsvfs->z_use_fuids || (ksid == NULL)) { |
70e083d2 TG |
514 | id = (type == ZFS_OWNER) ? crgetuid(cr) : crgetgid(cr); |
515 | ||
516 | if (IS_EPHEMERAL(id)) | |
517 | return ((type == ZFS_OWNER) ? UID_NOBODY : GID_NOBODY); | |
518 | ||
519 | return ((uint64_t)id); | |
520 | } | |
521 | ||
522 | /* | |
523 | * ksid is present and FUID is supported | |
524 | */ | |
525 | id = (type == ZFS_OWNER) ? ksid_getid(ksid) : crgetgid(cr); | |
526 | ||
527 | if (!IS_EPHEMERAL(id)) | |
528 | return ((uint64_t)id); | |
529 | ||
530 | if (type == ZFS_GROUP) | |
531 | id = ksid_getid(ksid); | |
532 | ||
533 | rid = ksid_getrid(ksid); | |
534 | domain = ksid_getdomain(ksid); | |
535 | ||
86e3c28a | 536 | idx = zfs_fuid_find_by_domain(zfsvfs, domain, &kdomain, B_TRUE); |
70e083d2 TG |
537 | |
538 | zfs_fuid_node_add(fuidp, kdomain, rid, idx, id, type); | |
539 | ||
540 | return (FUID_ENCODE(idx, rid)); | |
541 | } | |
542 | #endif /* HAVE_KSID */ | |
543 | ||
544 | /* | |
545 | * Create a file system FUID for an ACL ace | |
546 | * or a chown/chgrp of the file. | |
547 | * This is similar to zfs_fuid_create_cred, except that | |
548 | * we can't find the domain + rid information in the | |
549 | * cred. Instead we have to query Winchester for the | |
550 | * domain and rid. | |
551 | * | |
552 | * During replay operations the domain+rid information is | |
553 | * found in the zfs_fuid_info_t that the replay code has | |
86e3c28a | 554 | * attached to the zfsvfs of the file system. |
70e083d2 TG |
555 | */ |
556 | uint64_t | |
86e3c28a | 557 | zfs_fuid_create(zfsvfs_t *zfsvfs, uint64_t id, cred_t *cr, |
70e083d2 TG |
558 | zfs_fuid_type_t type, zfs_fuid_info_t **fuidpp) |
559 | { | |
560 | #ifdef HAVE_KSID | |
561 | const char *domain; | |
562 | char *kdomain; | |
563 | uint32_t fuid_idx = FUID_INDEX(id); | |
564 | uint32_t rid; | |
565 | idmap_stat status; | |
566 | uint64_t idx = 0; | |
567 | zfs_fuid_t *zfuid = NULL; | |
568 | zfs_fuid_info_t *fuidp = NULL; | |
569 | ||
570 | /* | |
571 | * If POSIX ID, or entry is already a FUID then | |
572 | * just return the id | |
573 | * | |
574 | * We may also be handed an already FUID'ized id via | |
575 | * chmod. | |
576 | */ | |
577 | ||
86e3c28a | 578 | if (!zfsvfs->z_use_fuids || !IS_EPHEMERAL(id) || fuid_idx != 0) |
70e083d2 TG |
579 | return (id); |
580 | ||
86e3c28a CIK |
581 | if (zfsvfs->z_replay) { |
582 | fuidp = zfsvfs->z_fuid_replay; | |
70e083d2 TG |
583 | |
584 | /* | |
585 | * If we are passed an ephemeral id, but no | |
586 | * fuid_info was logged then return NOBODY. | |
587 | * This is most likely a result of idmap service | |
588 | * not being available. | |
589 | */ | |
590 | if (fuidp == NULL) | |
591 | return (UID_NOBODY); | |
592 | ||
593 | VERIFY3U(type, >=, ZFS_OWNER); | |
594 | VERIFY3U(type, <=, ZFS_ACE_GROUP); | |
595 | ||
596 | switch (type) { | |
597 | case ZFS_ACE_USER: | |
598 | case ZFS_ACE_GROUP: | |
599 | zfuid = list_head(&fuidp->z_fuids); | |
600 | rid = FUID_RID(zfuid->z_logfuid); | |
601 | idx = FUID_INDEX(zfuid->z_logfuid); | |
602 | break; | |
603 | case ZFS_OWNER: | |
604 | rid = FUID_RID(fuidp->z_fuid_owner); | |
605 | idx = FUID_INDEX(fuidp->z_fuid_owner); | |
606 | break; | |
607 | case ZFS_GROUP: | |
608 | rid = FUID_RID(fuidp->z_fuid_group); | |
609 | idx = FUID_INDEX(fuidp->z_fuid_group); | |
610 | break; | |
611 | }; | |
612 | domain = fuidp->z_domain_table[idx - 1]; | |
613 | } else { | |
614 | if (type == ZFS_OWNER || type == ZFS_ACE_USER) | |
615 | status = kidmap_getsidbyuid(crgetzone(cr), id, | |
616 | &domain, &rid); | |
617 | else | |
618 | status = kidmap_getsidbygid(crgetzone(cr), id, | |
619 | &domain, &rid); | |
620 | ||
621 | if (status != 0) { | |
622 | /* | |
623 | * When returning nobody we will need to | |
624 | * make a dummy fuid table entry for logging | |
625 | * purposes. | |
626 | */ | |
627 | rid = UID_NOBODY; | |
628 | domain = nulldomain; | |
629 | } | |
630 | } | |
631 | ||
86e3c28a | 632 | idx = zfs_fuid_find_by_domain(zfsvfs, domain, &kdomain, B_TRUE); |
70e083d2 | 633 | |
86e3c28a | 634 | if (!zfsvfs->z_replay) |
70e083d2 TG |
635 | zfs_fuid_node_add(fuidpp, kdomain, |
636 | rid, idx, id, type); | |
637 | else if (zfuid != NULL) { | |
638 | list_remove(&fuidp->z_fuids, zfuid); | |
639 | kmem_free(zfuid, sizeof (zfs_fuid_t)); | |
640 | } | |
641 | return (FUID_ENCODE(idx, rid)); | |
642 | #else | |
643 | /* | |
644 | * The Linux port only supports POSIX IDs, use the passed id. | |
645 | */ | |
646 | return (id); | |
647 | #endif | |
648 | } | |
649 | ||
650 | void | |
86e3c28a | 651 | zfs_fuid_destroy(zfsvfs_t *zfsvfs) |
70e083d2 | 652 | { |
86e3c28a CIK |
653 | rw_enter(&zfsvfs->z_fuid_lock, RW_WRITER); |
654 | if (!zfsvfs->z_fuid_loaded) { | |
655 | rw_exit(&zfsvfs->z_fuid_lock); | |
70e083d2 TG |
656 | return; |
657 | } | |
86e3c28a CIK |
658 | zfs_fuid_table_destroy(&zfsvfs->z_fuid_idx, &zfsvfs->z_fuid_domain); |
659 | rw_exit(&zfsvfs->z_fuid_lock); | |
70e083d2 TG |
660 | } |
661 | ||
662 | /* | |
663 | * Allocate zfs_fuid_info for tracking FUIDs created during | |
664 | * zfs_mknode, VOP_SETATTR() or VOP_SETSECATTR() | |
665 | */ | |
666 | zfs_fuid_info_t * | |
667 | zfs_fuid_info_alloc(void) | |
668 | { | |
669 | zfs_fuid_info_t *fuidp; | |
670 | ||
671 | fuidp = kmem_zalloc(sizeof (zfs_fuid_info_t), KM_SLEEP); | |
672 | list_create(&fuidp->z_domains, sizeof (zfs_fuid_domain_t), | |
673 | offsetof(zfs_fuid_domain_t, z_next)); | |
674 | list_create(&fuidp->z_fuids, sizeof (zfs_fuid_t), | |
675 | offsetof(zfs_fuid_t, z_next)); | |
676 | return (fuidp); | |
677 | } | |
678 | ||
679 | /* | |
680 | * Release all memory associated with zfs_fuid_info_t | |
681 | */ | |
682 | void | |
683 | zfs_fuid_info_free(zfs_fuid_info_t *fuidp) | |
684 | { | |
685 | zfs_fuid_t *zfuid; | |
686 | zfs_fuid_domain_t *zdomain; | |
687 | ||
688 | while ((zfuid = list_head(&fuidp->z_fuids)) != NULL) { | |
689 | list_remove(&fuidp->z_fuids, zfuid); | |
690 | kmem_free(zfuid, sizeof (zfs_fuid_t)); | |
691 | } | |
692 | ||
693 | if (fuidp->z_domain_table != NULL) | |
694 | kmem_free(fuidp->z_domain_table, | |
86e3c28a | 695 | (sizeof (char *)) * fuidp->z_domain_cnt); |
70e083d2 TG |
696 | |
697 | while ((zdomain = list_head(&fuidp->z_domains)) != NULL) { | |
698 | list_remove(&fuidp->z_domains, zdomain); | |
699 | kmem_free(zdomain, sizeof (zfs_fuid_domain_t)); | |
700 | } | |
701 | ||
702 | kmem_free(fuidp, sizeof (zfs_fuid_info_t)); | |
703 | } | |
704 | ||
705 | /* | |
706 | * Check to see if id is a groupmember. If cred | |
707 | * has ksid info then sidlist is checked first | |
708 | * and if still not found then POSIX groups are checked | |
709 | * | |
710 | * Will use a straight FUID compare when possible. | |
711 | */ | |
712 | boolean_t | |
86e3c28a | 713 | zfs_groupmember(zfsvfs_t *zfsvfs, uint64_t id, cred_t *cr) |
70e083d2 TG |
714 | { |
715 | #ifdef HAVE_KSID | |
716 | ksid_t *ksid = crgetsid(cr, KSID_GROUP); | |
717 | ksidlist_t *ksidlist = crgetsidlist(cr); | |
718 | uid_t gid; | |
719 | ||
720 | if (ksid && ksidlist) { | |
721 | int i; | |
722 | ksid_t *ksid_groups; | |
723 | uint32_t idx = FUID_INDEX(id); | |
724 | uint32_t rid = FUID_RID(id); | |
725 | ||
726 | ksid_groups = ksidlist->ksl_sids; | |
727 | ||
728 | for (i = 0; i != ksidlist->ksl_nsid; i++) { | |
729 | if (idx == 0) { | |
730 | if (id != IDMAP_WK_CREATOR_GROUP_GID && | |
731 | id == ksid_groups[i].ks_id) { | |
732 | return (B_TRUE); | |
733 | } | |
734 | } else { | |
735 | const char *domain; | |
736 | ||
86e3c28a | 737 | domain = zfs_fuid_find_by_idx(zfsvfs, idx); |
70e083d2 TG |
738 | ASSERT(domain != NULL); |
739 | ||
740 | if (strcmp(domain, | |
741 | IDMAP_WK_CREATOR_SID_AUTHORITY) == 0) | |
742 | return (B_FALSE); | |
743 | ||
744 | if ((strcmp(domain, | |
745 | ksid_groups[i].ks_domain->kd_name) == 0) && | |
746 | rid == ksid_groups[i].ks_rid) | |
747 | return (B_TRUE); | |
748 | } | |
749 | } | |
750 | } | |
751 | ||
752 | /* | |
753 | * Not found in ksidlist, check posix groups | |
754 | */ | |
86e3c28a | 755 | gid = zfs_fuid_map_id(zfsvfs, id, cr, ZFS_GROUP); |
70e083d2 TG |
756 | return (groupmember(gid, cr)); |
757 | #else | |
758 | return (B_TRUE); | |
759 | #endif | |
760 | } | |
761 | ||
762 | void | |
86e3c28a | 763 | zfs_fuid_txhold(zfsvfs_t *zfsvfs, dmu_tx_t *tx) |
70e083d2 | 764 | { |
86e3c28a | 765 | if (zfsvfs->z_fuid_obj == 0) { |
70e083d2 TG |
766 | dmu_tx_hold_bonus(tx, DMU_NEW_OBJECT); |
767 | dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, | |
86e3c28a | 768 | FUID_SIZE_ESTIMATE(zfsvfs)); |
70e083d2 TG |
769 | dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, FALSE, NULL); |
770 | } else { | |
86e3c28a CIK |
771 | dmu_tx_hold_bonus(tx, zfsvfs->z_fuid_obj); |
772 | dmu_tx_hold_write(tx, zfsvfs->z_fuid_obj, 0, | |
773 | FUID_SIZE_ESTIMATE(zfsvfs)); | |
70e083d2 TG |
774 | } |
775 | } | |
776 | #endif |