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b3b94faa DT |
1 | /* |
2 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. | |
3a8a9a10 | 3 | * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. |
b3b94faa DT |
4 | * |
5 | * This copyrighted material is made available to anyone wishing to use, | |
6 | * modify, copy, or redistribute it subject to the terms and conditions | |
7 | * of the GNU General Public License v.2. | |
8 | */ | |
9 | ||
10 | #include <linux/sched.h> | |
11 | #include <linux/slab.h> | |
12 | #include <linux/spinlock.h> | |
13 | #include <linux/completion.h> | |
14 | #include <linux/buffer_head.h> | |
15 | #include <linux/xattr.h> | |
5c676f6d | 16 | #include <linux/gfs2_ondisk.h> |
b3b94faa DT |
17 | #include <asm/uaccess.h> |
18 | ||
19 | #include "gfs2.h" | |
5c676f6d SW |
20 | #include "lm_interface.h" |
21 | #include "incore.h" | |
b3b94faa DT |
22 | #include "acl.h" |
23 | #include "eaops.h" | |
24 | #include "eattr.h" | |
25 | #include "glock.h" | |
26 | #include "inode.h" | |
27 | #include "meta_io.h" | |
28 | #include "quota.h" | |
29 | #include "rgrp.h" | |
30 | #include "trans.h" | |
5c676f6d | 31 | #include "util.h" |
b3b94faa DT |
32 | |
33 | /** | |
34 | * ea_calc_size - returns the acutal number of bytes the request will take up | |
35 | * (not counting any unstuffed data blocks) | |
36 | * @sdp: | |
37 | * @er: | |
38 | * @size: | |
39 | * | |
40 | * Returns: 1 if the EA should be stuffed | |
41 | */ | |
42 | ||
43 | static int ea_calc_size(struct gfs2_sbd *sdp, struct gfs2_ea_request *er, | |
44 | unsigned int *size) | |
45 | { | |
46 | *size = GFS2_EAREQ_SIZE_STUFFED(er); | |
47 | if (*size <= sdp->sd_jbsize) | |
48 | return 1; | |
49 | ||
50 | *size = GFS2_EAREQ_SIZE_UNSTUFFED(sdp, er); | |
51 | ||
52 | return 0; | |
53 | } | |
54 | ||
55 | static int ea_check_size(struct gfs2_sbd *sdp, struct gfs2_ea_request *er) | |
56 | { | |
57 | unsigned int size; | |
58 | ||
59 | if (er->er_data_len > GFS2_EA_MAX_DATA_LEN) | |
60 | return -ERANGE; | |
61 | ||
62 | ea_calc_size(sdp, er, &size); | |
63 | ||
64 | /* This can only happen with 512 byte blocks */ | |
65 | if (size > sdp->sd_jbsize) | |
66 | return -ERANGE; | |
67 | ||
68 | return 0; | |
69 | } | |
70 | ||
71 | typedef int (*ea_call_t) (struct gfs2_inode *ip, | |
72 | struct buffer_head *bh, | |
73 | struct gfs2_ea_header *ea, | |
74 | struct gfs2_ea_header *prev, | |
75 | void *private); | |
76 | ||
77 | static int ea_foreach_i(struct gfs2_inode *ip, struct buffer_head *bh, | |
78 | ea_call_t ea_call, void *data) | |
79 | { | |
80 | struct gfs2_ea_header *ea, *prev = NULL; | |
81 | int error = 0; | |
82 | ||
83 | if (gfs2_metatype_check(ip->i_sbd, bh, GFS2_METATYPE_EA)) | |
84 | return -EIO; | |
85 | ||
86 | for (ea = GFS2_EA_BH2FIRST(bh);; prev = ea, ea = GFS2_EA2NEXT(ea)) { | |
87 | if (!GFS2_EA_REC_LEN(ea)) | |
88 | goto fail; | |
89 | if (!(bh->b_data <= (char *)ea && | |
90 | (char *)GFS2_EA2NEXT(ea) <= | |
91 | bh->b_data + bh->b_size)) | |
92 | goto fail; | |
93 | if (!GFS2_EATYPE_VALID(ea->ea_type)) | |
94 | goto fail; | |
95 | ||
96 | error = ea_call(ip, bh, ea, prev, data); | |
97 | if (error) | |
98 | return error; | |
99 | ||
100 | if (GFS2_EA_IS_LAST(ea)) { | |
101 | if ((char *)GFS2_EA2NEXT(ea) != | |
102 | bh->b_data + bh->b_size) | |
103 | goto fail; | |
104 | break; | |
105 | } | |
106 | } | |
107 | ||
108 | return error; | |
109 | ||
110 | fail: | |
111 | gfs2_consist_inode(ip); | |
112 | return -EIO; | |
113 | } | |
114 | ||
115 | static int ea_foreach(struct gfs2_inode *ip, ea_call_t ea_call, void *data) | |
116 | { | |
117 | struct buffer_head *bh, *eabh; | |
118 | uint64_t *eablk, *end; | |
119 | int error; | |
120 | ||
121 | error = gfs2_meta_read(ip->i_gl, ip->i_di.di_eattr, | |
122 | DIO_START | DIO_WAIT, &bh); | |
123 | if (error) | |
124 | return error; | |
125 | ||
126 | if (!(ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT)) { | |
127 | error = ea_foreach_i(ip, bh, ea_call, data); | |
128 | goto out; | |
129 | } | |
130 | ||
131 | if (gfs2_metatype_check(ip->i_sbd, bh, GFS2_METATYPE_IN)) { | |
132 | error = -EIO; | |
133 | goto out; | |
134 | } | |
135 | ||
136 | eablk = (uint64_t *)(bh->b_data + sizeof(struct gfs2_meta_header)); | |
137 | end = eablk + ip->i_sbd->sd_inptrs; | |
138 | ||
139 | for (; eablk < end; eablk++) { | |
140 | uint64_t bn; | |
141 | ||
142 | if (!*eablk) | |
143 | break; | |
144 | bn = be64_to_cpu(*eablk); | |
145 | ||
146 | error = gfs2_meta_read(ip->i_gl, bn, DIO_START | DIO_WAIT, | |
147 | &eabh); | |
148 | if (error) | |
149 | break; | |
150 | error = ea_foreach_i(ip, eabh, ea_call, data); | |
151 | brelse(eabh); | |
152 | if (error) | |
153 | break; | |
154 | } | |
155 | out: | |
156 | brelse(bh); | |
157 | ||
158 | return error; | |
159 | } | |
160 | ||
161 | struct ea_find { | |
162 | struct gfs2_ea_request *ef_er; | |
163 | struct gfs2_ea_location *ef_el; | |
164 | }; | |
165 | ||
166 | static int ea_find_i(struct gfs2_inode *ip, struct buffer_head *bh, | |
167 | struct gfs2_ea_header *ea, struct gfs2_ea_header *prev, | |
168 | void *private) | |
169 | { | |
170 | struct ea_find *ef = private; | |
171 | struct gfs2_ea_request *er = ef->ef_er; | |
172 | ||
173 | if (ea->ea_type == GFS2_EATYPE_UNUSED) | |
174 | return 0; | |
175 | ||
176 | if (ea->ea_type == er->er_type) { | |
177 | if (ea->ea_name_len == er->er_name_len && | |
178 | !memcmp(GFS2_EA2NAME(ea), er->er_name, ea->ea_name_len)) { | |
179 | struct gfs2_ea_location *el = ef->ef_el; | |
180 | get_bh(bh); | |
181 | el->el_bh = bh; | |
182 | el->el_ea = ea; | |
183 | el->el_prev = prev; | |
184 | return 1; | |
185 | } | |
186 | } | |
187 | ||
188 | #if 0 | |
189 | else if ((ip->i_di.di_flags & GFS2_DIF_EA_PACKED) && | |
190 | er->er_type == GFS2_EATYPE_SYS) | |
191 | return 1; | |
192 | #endif | |
193 | ||
194 | return 0; | |
195 | } | |
196 | ||
197 | int gfs2_ea_find(struct gfs2_inode *ip, struct gfs2_ea_request *er, | |
198 | struct gfs2_ea_location *el) | |
199 | { | |
200 | struct ea_find ef; | |
201 | int error; | |
202 | ||
203 | ef.ef_er = er; | |
204 | ef.ef_el = el; | |
205 | ||
206 | memset(el, 0, sizeof(struct gfs2_ea_location)); | |
207 | ||
208 | error = ea_foreach(ip, ea_find_i, &ef); | |
209 | if (error > 0) | |
210 | return 0; | |
211 | ||
212 | return error; | |
213 | } | |
214 | ||
215 | /** | |
216 | * ea_dealloc_unstuffed - | |
217 | * @ip: | |
218 | * @bh: | |
219 | * @ea: | |
220 | * @prev: | |
221 | * @private: | |
222 | * | |
223 | * Take advantage of the fact that all unstuffed blocks are | |
224 | * allocated from the same RG. But watch, this may not always | |
225 | * be true. | |
226 | * | |
227 | * Returns: errno | |
228 | */ | |
229 | ||
230 | static int ea_dealloc_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh, | |
231 | struct gfs2_ea_header *ea, | |
232 | struct gfs2_ea_header *prev, void *private) | |
233 | { | |
234 | int *leave = private; | |
235 | struct gfs2_sbd *sdp = ip->i_sbd; | |
236 | struct gfs2_rgrpd *rgd; | |
237 | struct gfs2_holder rg_gh; | |
238 | struct buffer_head *dibh; | |
239 | uint64_t *dataptrs, bn = 0; | |
240 | uint64_t bstart = 0; | |
241 | unsigned int blen = 0; | |
242 | unsigned int blks = 0; | |
243 | unsigned int x; | |
244 | int error; | |
245 | ||
246 | if (GFS2_EA_IS_STUFFED(ea)) | |
247 | return 0; | |
248 | ||
249 | dataptrs = GFS2_EA2DATAPTRS(ea); | |
250 | for (x = 0; x < ea->ea_num_ptrs; x++, dataptrs++) | |
251 | if (*dataptrs) { | |
252 | blks++; | |
253 | bn = be64_to_cpu(*dataptrs); | |
254 | } | |
255 | if (!blks) | |
256 | return 0; | |
257 | ||
258 | rgd = gfs2_blk2rgrpd(sdp, bn); | |
259 | if (!rgd) { | |
260 | gfs2_consist_inode(ip); | |
261 | return -EIO; | |
262 | } | |
263 | ||
264 | error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &rg_gh); | |
265 | if (error) | |
266 | return error; | |
267 | ||
268 | error = gfs2_trans_begin(sdp, rgd->rd_ri.ri_length + | |
269 | RES_DINODE + RES_EATTR + RES_STATFS + | |
270 | RES_QUOTA, blks); | |
271 | if (error) | |
272 | goto out_gunlock; | |
273 | ||
d4e9c4c3 | 274 | gfs2_trans_add_bh(ip->i_gl, bh, 1); |
b3b94faa DT |
275 | |
276 | dataptrs = GFS2_EA2DATAPTRS(ea); | |
277 | for (x = 0; x < ea->ea_num_ptrs; x++, dataptrs++) { | |
278 | if (!*dataptrs) | |
279 | break; | |
280 | bn = be64_to_cpu(*dataptrs); | |
281 | ||
282 | if (bstart + blen == bn) | |
283 | blen++; | |
284 | else { | |
285 | if (bstart) | |
286 | gfs2_free_meta(ip, bstart, blen); | |
287 | bstart = bn; | |
288 | blen = 1; | |
289 | } | |
290 | ||
291 | *dataptrs = 0; | |
292 | if (!ip->i_di.di_blocks) | |
293 | gfs2_consist_inode(ip); | |
294 | ip->i_di.di_blocks--; | |
295 | } | |
296 | if (bstart) | |
297 | gfs2_free_meta(ip, bstart, blen); | |
298 | ||
299 | if (prev && !leave) { | |
300 | uint32_t len; | |
301 | ||
302 | len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea); | |
303 | prev->ea_rec_len = cpu_to_be32(len); | |
304 | ||
305 | if (GFS2_EA_IS_LAST(ea)) | |
306 | prev->ea_flags |= GFS2_EAFLAG_LAST; | |
307 | } else { | |
308 | ea->ea_type = GFS2_EATYPE_UNUSED; | |
309 | ea->ea_num_ptrs = 0; | |
310 | } | |
311 | ||
312 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
313 | if (!error) { | |
314 | ip->i_di.di_ctime = get_seconds(); | |
d4e9c4c3 | 315 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
b3b94faa DT |
316 | gfs2_dinode_out(&ip->i_di, dibh->b_data); |
317 | brelse(dibh); | |
318 | } | |
319 | ||
320 | gfs2_trans_end(sdp); | |
321 | ||
322 | out_gunlock: | |
323 | gfs2_glock_dq_uninit(&rg_gh); | |
324 | ||
325 | return error; | |
326 | } | |
327 | ||
328 | static int ea_remove_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh, | |
329 | struct gfs2_ea_header *ea, | |
330 | struct gfs2_ea_header *prev, int leave) | |
331 | { | |
332 | struct gfs2_alloc *al; | |
333 | int error; | |
334 | ||
335 | al = gfs2_alloc_get(ip); | |
336 | ||
337 | error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE); | |
338 | if (error) | |
339 | goto out_alloc; | |
340 | ||
341 | error = gfs2_rindex_hold(ip->i_sbd, &al->al_ri_gh); | |
342 | if (error) | |
343 | goto out_quota; | |
344 | ||
345 | error = ea_dealloc_unstuffed(ip, | |
346 | bh, ea, prev, | |
347 | (leave) ? &error : NULL); | |
348 | ||
349 | gfs2_glock_dq_uninit(&al->al_ri_gh); | |
350 | ||
351 | out_quota: | |
352 | gfs2_quota_unhold(ip); | |
353 | ||
354 | out_alloc: | |
355 | gfs2_alloc_put(ip); | |
356 | ||
357 | return error; | |
358 | } | |
359 | ||
b3b94faa DT |
360 | struct ea_list { |
361 | struct gfs2_ea_request *ei_er; | |
362 | unsigned int ei_size; | |
363 | }; | |
364 | ||
365 | static int ea_list_i(struct gfs2_inode *ip, struct buffer_head *bh, | |
366 | struct gfs2_ea_header *ea, struct gfs2_ea_header *prev, | |
367 | void *private) | |
368 | { | |
369 | struct ea_list *ei = private; | |
370 | struct gfs2_ea_request *er = ei->ei_er; | |
371 | unsigned int ea_size = GFS2_EA_STRLEN(ea); | |
372 | ||
373 | if (ea->ea_type == GFS2_EATYPE_UNUSED) | |
374 | return 0; | |
375 | ||
376 | if (er->er_data_len) { | |
377 | char *prefix; | |
378 | unsigned int l; | |
379 | char c = 0; | |
380 | ||
381 | if (ei->ei_size + ea_size > er->er_data_len) | |
382 | return -ERANGE; | |
383 | ||
384 | if (ea->ea_type == GFS2_EATYPE_USR) { | |
385 | prefix = "user."; | |
386 | l = 5; | |
387 | } else { | |
388 | prefix = "system."; | |
389 | l = 7; | |
390 | } | |
391 | ||
392 | memcpy(er->er_data + ei->ei_size, | |
393 | prefix, l); | |
394 | memcpy(er->er_data + ei->ei_size + l, | |
395 | GFS2_EA2NAME(ea), | |
396 | ea->ea_name_len); | |
397 | memcpy(er->er_data + ei->ei_size + | |
398 | ea_size - 1, | |
399 | &c, 1); | |
400 | } | |
401 | ||
402 | ei->ei_size += ea_size; | |
403 | ||
404 | return 0; | |
405 | } | |
406 | ||
407 | /** | |
408 | * gfs2_ea_list - | |
409 | * @ip: | |
410 | * @er: | |
411 | * | |
412 | * Returns: actual size of data on success, -errno on error | |
413 | */ | |
414 | ||
415 | int gfs2_ea_list(struct gfs2_inode *ip, struct gfs2_ea_request *er) | |
416 | { | |
417 | struct gfs2_holder i_gh; | |
418 | int error; | |
419 | ||
420 | if (!er->er_data || !er->er_data_len) { | |
421 | er->er_data = NULL; | |
422 | er->er_data_len = 0; | |
423 | } | |
424 | ||
425 | error = gfs2_glock_nq_init(ip->i_gl, | |
426 | LM_ST_SHARED, LM_FLAG_ANY, | |
427 | &i_gh); | |
428 | if (error) | |
429 | return error; | |
430 | ||
431 | if (ip->i_di.di_eattr) { | |
432 | struct ea_list ei = { .ei_er = er, .ei_size = 0 }; | |
433 | ||
434 | error = ea_foreach(ip, ea_list_i, &ei); | |
435 | if (!error) | |
436 | error = ei.ei_size; | |
437 | } | |
438 | ||
439 | gfs2_glock_dq_uninit(&i_gh); | |
440 | ||
441 | return error; | |
442 | } | |
443 | ||
444 | /** | |
445 | * ea_get_unstuffed - actually copies the unstuffed data into the | |
446 | * request buffer | |
447 | * @ip: | |
448 | * @ea: | |
449 | * @data: | |
450 | * | |
451 | * Returns: errno | |
452 | */ | |
453 | ||
454 | static int ea_get_unstuffed(struct gfs2_inode *ip, struct gfs2_ea_header *ea, | |
455 | char *data) | |
456 | { | |
457 | struct gfs2_sbd *sdp = ip->i_sbd; | |
458 | struct buffer_head **bh; | |
459 | unsigned int amount = GFS2_EA_DATA_LEN(ea); | |
5c676f6d | 460 | unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize); |
b3b94faa DT |
461 | uint64_t *dataptrs = GFS2_EA2DATAPTRS(ea); |
462 | unsigned int x; | |
463 | int error = 0; | |
464 | ||
465 | bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_KERNEL); | |
466 | if (!bh) | |
467 | return -ENOMEM; | |
468 | ||
469 | for (x = 0; x < nptrs; x++) { | |
470 | error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs), | |
471 | DIO_START, bh + x); | |
472 | if (error) { | |
473 | while (x--) | |
474 | brelse(bh[x]); | |
475 | goto out; | |
476 | } | |
477 | dataptrs++; | |
478 | } | |
479 | ||
480 | for (x = 0; x < nptrs; x++) { | |
481 | error = gfs2_meta_reread(sdp, bh[x], DIO_WAIT); | |
482 | if (error) { | |
483 | for (; x < nptrs; x++) | |
484 | brelse(bh[x]); | |
485 | goto out; | |
486 | } | |
487 | if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) { | |
488 | for (; x < nptrs; x++) | |
489 | brelse(bh[x]); | |
490 | error = -EIO; | |
491 | goto out; | |
492 | } | |
493 | ||
494 | memcpy(data, | |
495 | bh[x]->b_data + sizeof(struct gfs2_meta_header), | |
496 | (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize); | |
497 | ||
498 | amount -= sdp->sd_jbsize; | |
499 | data += sdp->sd_jbsize; | |
500 | ||
501 | brelse(bh[x]); | |
502 | } | |
503 | ||
504 | out: | |
505 | kfree(bh); | |
506 | ||
507 | return error; | |
508 | } | |
509 | ||
510 | int gfs2_ea_get_copy(struct gfs2_inode *ip, struct gfs2_ea_location *el, | |
511 | char *data) | |
512 | { | |
513 | if (GFS2_EA_IS_STUFFED(el->el_ea)) { | |
514 | memcpy(data, | |
515 | GFS2_EA2DATA(el->el_ea), | |
516 | GFS2_EA_DATA_LEN(el->el_ea)); | |
517 | return 0; | |
518 | } else | |
519 | return ea_get_unstuffed(ip, el->el_ea, data); | |
520 | } | |
521 | ||
522 | /** | |
523 | * gfs2_ea_get_i - | |
524 | * @ip: | |
525 | * @er: | |
526 | * | |
527 | * Returns: actual size of data on success, -errno on error | |
528 | */ | |
529 | ||
530 | int gfs2_ea_get_i(struct gfs2_inode *ip, struct gfs2_ea_request *er) | |
531 | { | |
532 | struct gfs2_ea_location el; | |
533 | int error; | |
534 | ||
535 | if (!ip->i_di.di_eattr) | |
536 | return -ENODATA; | |
537 | ||
538 | error = gfs2_ea_find(ip, er, &el); | |
539 | if (error) | |
540 | return error; | |
541 | if (!el.el_ea) | |
542 | return -ENODATA; | |
543 | ||
544 | if (er->er_data_len) { | |
545 | if (GFS2_EA_DATA_LEN(el.el_ea) > er->er_data_len) | |
546 | error = -ERANGE; | |
547 | else | |
548 | error = gfs2_ea_get_copy(ip, &el, er->er_data); | |
549 | } | |
550 | if (!error) | |
551 | error = GFS2_EA_DATA_LEN(el.el_ea); | |
552 | ||
553 | brelse(el.el_bh); | |
554 | ||
555 | return error; | |
556 | } | |
557 | ||
558 | /** | |
559 | * gfs2_ea_get - | |
560 | * @ip: | |
561 | * @er: | |
562 | * | |
563 | * Returns: actual size of data on success, -errno on error | |
564 | */ | |
565 | ||
566 | int gfs2_ea_get(struct gfs2_inode *ip, struct gfs2_ea_request *er) | |
567 | { | |
568 | struct gfs2_holder i_gh; | |
569 | int error; | |
570 | ||
571 | if (!er->er_name_len || | |
572 | er->er_name_len > GFS2_EA_MAX_NAME_LEN) | |
573 | return -EINVAL; | |
574 | if (!er->er_data || !er->er_data_len) { | |
575 | er->er_data = NULL; | |
576 | er->er_data_len = 0; | |
577 | } | |
578 | ||
579 | error = gfs2_glock_nq_init(ip->i_gl, | |
580 | LM_ST_SHARED, LM_FLAG_ANY, | |
581 | &i_gh); | |
582 | if (error) | |
583 | return error; | |
584 | ||
585 | error = gfs2_ea_ops[er->er_type]->eo_get(ip, er); | |
586 | ||
587 | gfs2_glock_dq_uninit(&i_gh); | |
588 | ||
589 | return error; | |
590 | } | |
591 | ||
592 | /** | |
593 | * ea_alloc_blk - allocates a new block for extended attributes. | |
594 | * @ip: A pointer to the inode that's getting extended attributes | |
595 | * @bhp: | |
596 | * | |
597 | * Returns: errno | |
598 | */ | |
599 | ||
600 | static int ea_alloc_blk(struct gfs2_inode *ip, struct buffer_head **bhp) | |
601 | { | |
602 | struct gfs2_sbd *sdp = ip->i_sbd; | |
603 | struct gfs2_ea_header *ea; | |
604 | uint64_t block; | |
605 | ||
606 | block = gfs2_alloc_meta(ip); | |
607 | ||
608 | *bhp = gfs2_meta_new(ip->i_gl, block); | |
d4e9c4c3 | 609 | gfs2_trans_add_bh(ip->i_gl, *bhp, 1); |
b3b94faa DT |
610 | gfs2_metatype_set(*bhp, GFS2_METATYPE_EA, GFS2_FORMAT_EA); |
611 | gfs2_buffer_clear_tail(*bhp, sizeof(struct gfs2_meta_header)); | |
612 | ||
613 | ea = GFS2_EA_BH2FIRST(*bhp); | |
614 | ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize); | |
615 | ea->ea_type = GFS2_EATYPE_UNUSED; | |
616 | ea->ea_flags = GFS2_EAFLAG_LAST; | |
617 | ea->ea_num_ptrs = 0; | |
618 | ||
619 | ip->i_di.di_blocks++; | |
620 | ||
621 | return 0; | |
622 | } | |
623 | ||
624 | /** | |
625 | * ea_write - writes the request info to an ea, creating new blocks if | |
626 | * necessary | |
627 | * @ip: inode that is being modified | |
628 | * @ea: the location of the new ea in a block | |
629 | * @er: the write request | |
630 | * | |
631 | * Note: does not update ea_rec_len or the GFS2_EAFLAG_LAST bin of ea_flags | |
632 | * | |
633 | * returns : errno | |
634 | */ | |
635 | ||
636 | static int ea_write(struct gfs2_inode *ip, struct gfs2_ea_header *ea, | |
637 | struct gfs2_ea_request *er) | |
638 | { | |
639 | struct gfs2_sbd *sdp = ip->i_sbd; | |
640 | ||
641 | ea->ea_data_len = cpu_to_be32(er->er_data_len); | |
642 | ea->ea_name_len = er->er_name_len; | |
643 | ea->ea_type = er->er_type; | |
644 | ea->__pad = 0; | |
645 | ||
646 | memcpy(GFS2_EA2NAME(ea), er->er_name, er->er_name_len); | |
647 | ||
648 | if (GFS2_EAREQ_SIZE_STUFFED(er) <= sdp->sd_jbsize) { | |
649 | ea->ea_num_ptrs = 0; | |
650 | memcpy(GFS2_EA2DATA(ea), er->er_data, er->er_data_len); | |
651 | } else { | |
652 | uint64_t *dataptr = GFS2_EA2DATAPTRS(ea); | |
653 | const char *data = er->er_data; | |
654 | unsigned int data_len = er->er_data_len; | |
655 | unsigned int copy; | |
656 | unsigned int x; | |
657 | ||
5c676f6d | 658 | ea->ea_num_ptrs = DIV_ROUND_UP(er->er_data_len, sdp->sd_jbsize); |
b3b94faa DT |
659 | for (x = 0; x < ea->ea_num_ptrs; x++) { |
660 | struct buffer_head *bh; | |
661 | uint64_t block; | |
662 | int mh_size = sizeof(struct gfs2_meta_header); | |
663 | ||
664 | block = gfs2_alloc_meta(ip); | |
665 | ||
666 | bh = gfs2_meta_new(ip->i_gl, block); | |
d4e9c4c3 | 667 | gfs2_trans_add_bh(ip->i_gl, bh, 1); |
b3b94faa DT |
668 | gfs2_metatype_set(bh, GFS2_METATYPE_ED, GFS2_FORMAT_ED); |
669 | ||
670 | ip->i_di.di_blocks++; | |
671 | ||
672 | copy = (data_len > sdp->sd_jbsize) ? sdp->sd_jbsize : | |
673 | data_len; | |
674 | memcpy(bh->b_data + mh_size, data, copy); | |
675 | if (copy < sdp->sd_jbsize) | |
676 | memset(bh->b_data + mh_size + copy, 0, | |
677 | sdp->sd_jbsize - copy); | |
678 | ||
679 | *dataptr++ = cpu_to_be64((uint64_t)bh->b_blocknr); | |
680 | data += copy; | |
681 | data_len -= copy; | |
682 | ||
683 | brelse(bh); | |
684 | } | |
685 | ||
686 | gfs2_assert_withdraw(sdp, !data_len); | |
687 | } | |
688 | ||
689 | return 0; | |
690 | } | |
691 | ||
692 | typedef int (*ea_skeleton_call_t) (struct gfs2_inode *ip, | |
693 | struct gfs2_ea_request *er, | |
694 | void *private); | |
695 | ||
696 | static int ea_alloc_skeleton(struct gfs2_inode *ip, struct gfs2_ea_request *er, | |
697 | unsigned int blks, | |
698 | ea_skeleton_call_t skeleton_call, | |
699 | void *private) | |
700 | { | |
701 | struct gfs2_alloc *al; | |
702 | struct buffer_head *dibh; | |
703 | int error; | |
704 | ||
705 | al = gfs2_alloc_get(ip); | |
706 | ||
707 | error = gfs2_quota_lock(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE); | |
708 | if (error) | |
709 | goto out; | |
710 | ||
711 | error = gfs2_quota_check(ip, ip->i_di.di_uid, ip->i_di.di_gid); | |
712 | if (error) | |
713 | goto out_gunlock_q; | |
714 | ||
715 | al->al_requested = blks; | |
716 | ||
717 | error = gfs2_inplace_reserve(ip); | |
718 | if (error) | |
719 | goto out_gunlock_q; | |
720 | ||
721 | error = gfs2_trans_begin(ip->i_sbd, | |
722 | blks + al->al_rgd->rd_ri.ri_length + | |
723 | RES_DINODE + RES_STATFS + RES_QUOTA, 0); | |
724 | if (error) | |
725 | goto out_ipres; | |
726 | ||
727 | error = skeleton_call(ip, er, private); | |
728 | if (error) | |
729 | goto out_end_trans; | |
730 | ||
731 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
732 | if (!error) { | |
733 | if (er->er_flags & GFS2_ERF_MODE) { | |
734 | gfs2_assert_withdraw(ip->i_sbd, | |
735 | (ip->i_di.di_mode & S_IFMT) == | |
736 | (er->er_mode & S_IFMT)); | |
737 | ip->i_di.di_mode = er->er_mode; | |
738 | } | |
739 | ip->i_di.di_ctime = get_seconds(); | |
d4e9c4c3 | 740 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
b3b94faa DT |
741 | gfs2_dinode_out(&ip->i_di, dibh->b_data); |
742 | brelse(dibh); | |
743 | } | |
744 | ||
745 | out_end_trans: | |
746 | gfs2_trans_end(ip->i_sbd); | |
747 | ||
748 | out_ipres: | |
749 | gfs2_inplace_release(ip); | |
750 | ||
751 | out_gunlock_q: | |
752 | gfs2_quota_unlock(ip); | |
753 | ||
754 | out: | |
755 | gfs2_alloc_put(ip); | |
756 | ||
757 | return error; | |
758 | } | |
759 | ||
760 | static int ea_init_i(struct gfs2_inode *ip, struct gfs2_ea_request *er, | |
761 | void *private) | |
762 | { | |
763 | struct buffer_head *bh; | |
764 | int error; | |
765 | ||
766 | error = ea_alloc_blk(ip, &bh); | |
767 | if (error) | |
768 | return error; | |
769 | ||
770 | ip->i_di.di_eattr = bh->b_blocknr; | |
771 | error = ea_write(ip, GFS2_EA_BH2FIRST(bh), er); | |
772 | ||
773 | brelse(bh); | |
774 | ||
775 | return error; | |
776 | } | |
777 | ||
778 | /** | |
779 | * ea_init - initializes a new eattr block | |
780 | * @ip: | |
781 | * @er: | |
782 | * | |
783 | * Returns: errno | |
784 | */ | |
785 | ||
786 | static int ea_init(struct gfs2_inode *ip, struct gfs2_ea_request *er) | |
787 | { | |
788 | unsigned int jbsize = ip->i_sbd->sd_jbsize; | |
789 | unsigned int blks = 1; | |
790 | ||
791 | if (GFS2_EAREQ_SIZE_STUFFED(er) > jbsize) | |
5c676f6d | 792 | blks += DIV_ROUND_UP(er->er_data_len, jbsize); |
b3b94faa DT |
793 | |
794 | return ea_alloc_skeleton(ip, er, blks, ea_init_i, NULL); | |
795 | } | |
796 | ||
797 | static struct gfs2_ea_header *ea_split_ea(struct gfs2_ea_header *ea) | |
798 | { | |
799 | uint32_t ea_size = GFS2_EA_SIZE(ea); | |
568f4c96 SW |
800 | struct gfs2_ea_header *new = (struct gfs2_ea_header *)((char *)ea + |
801 | ea_size); | |
b3b94faa DT |
802 | uint32_t new_size = GFS2_EA_REC_LEN(ea) - ea_size; |
803 | int last = ea->ea_flags & GFS2_EAFLAG_LAST; | |
804 | ||
805 | ea->ea_rec_len = cpu_to_be32(ea_size); | |
806 | ea->ea_flags ^= last; | |
807 | ||
808 | new->ea_rec_len = cpu_to_be32(new_size); | |
809 | new->ea_flags = last; | |
810 | ||
811 | return new; | |
812 | } | |
813 | ||
814 | static void ea_set_remove_stuffed(struct gfs2_inode *ip, | |
815 | struct gfs2_ea_location *el) | |
816 | { | |
817 | struct gfs2_ea_header *ea = el->el_ea; | |
818 | struct gfs2_ea_header *prev = el->el_prev; | |
819 | uint32_t len; | |
820 | ||
d4e9c4c3 | 821 | gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1); |
b3b94faa DT |
822 | |
823 | if (!prev || !GFS2_EA_IS_STUFFED(ea)) { | |
824 | ea->ea_type = GFS2_EATYPE_UNUSED; | |
825 | return; | |
826 | } else if (GFS2_EA2NEXT(prev) != ea) { | |
827 | prev = GFS2_EA2NEXT(prev); | |
828 | gfs2_assert_withdraw(ip->i_sbd, GFS2_EA2NEXT(prev) == ea); | |
829 | } | |
830 | ||
831 | len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea); | |
832 | prev->ea_rec_len = cpu_to_be32(len); | |
833 | ||
834 | if (GFS2_EA_IS_LAST(ea)) | |
835 | prev->ea_flags |= GFS2_EAFLAG_LAST; | |
836 | } | |
837 | ||
838 | struct ea_set { | |
839 | int ea_split; | |
840 | ||
841 | struct gfs2_ea_request *es_er; | |
842 | struct gfs2_ea_location *es_el; | |
843 | ||
844 | struct buffer_head *es_bh; | |
845 | struct gfs2_ea_header *es_ea; | |
846 | }; | |
847 | ||
848 | static int ea_set_simple_noalloc(struct gfs2_inode *ip, struct buffer_head *bh, | |
849 | struct gfs2_ea_header *ea, struct ea_set *es) | |
850 | { | |
851 | struct gfs2_ea_request *er = es->es_er; | |
852 | struct buffer_head *dibh; | |
853 | int error; | |
854 | ||
855 | error = gfs2_trans_begin(ip->i_sbd, RES_DINODE + 2 * RES_EATTR, 0); | |
856 | if (error) | |
857 | return error; | |
858 | ||
d4e9c4c3 | 859 | gfs2_trans_add_bh(ip->i_gl, bh, 1); |
b3b94faa DT |
860 | |
861 | if (es->ea_split) | |
862 | ea = ea_split_ea(ea); | |
863 | ||
864 | ea_write(ip, ea, er); | |
865 | ||
866 | if (es->es_el) | |
867 | ea_set_remove_stuffed(ip, es->es_el); | |
868 | ||
869 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
870 | if (error) | |
871 | goto out; | |
872 | ||
873 | if (er->er_flags & GFS2_ERF_MODE) { | |
874 | gfs2_assert_withdraw(ip->i_sbd, | |
875 | (ip->i_di.di_mode & S_IFMT) == (er->er_mode & S_IFMT)); | |
876 | ip->i_di.di_mode = er->er_mode; | |
877 | } | |
878 | ip->i_di.di_ctime = get_seconds(); | |
d4e9c4c3 | 879 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
b3b94faa DT |
880 | gfs2_dinode_out(&ip->i_di, dibh->b_data); |
881 | brelse(dibh); | |
882 | out: | |
883 | gfs2_trans_end(ip->i_sbd); | |
884 | ||
885 | return error; | |
886 | } | |
887 | ||
888 | static int ea_set_simple_alloc(struct gfs2_inode *ip, | |
889 | struct gfs2_ea_request *er, void *private) | |
890 | { | |
891 | struct ea_set *es = private; | |
892 | struct gfs2_ea_header *ea = es->es_ea; | |
893 | int error; | |
894 | ||
d4e9c4c3 | 895 | gfs2_trans_add_bh(ip->i_gl, es->es_bh, 1); |
b3b94faa DT |
896 | |
897 | if (es->ea_split) | |
898 | ea = ea_split_ea(ea); | |
899 | ||
900 | error = ea_write(ip, ea, er); | |
901 | if (error) | |
902 | return error; | |
903 | ||
904 | if (es->es_el) | |
905 | ea_set_remove_stuffed(ip, es->es_el); | |
906 | ||
907 | return 0; | |
908 | } | |
909 | ||
910 | static int ea_set_simple(struct gfs2_inode *ip, struct buffer_head *bh, | |
911 | struct gfs2_ea_header *ea, struct gfs2_ea_header *prev, | |
912 | void *private) | |
913 | { | |
914 | struct ea_set *es = private; | |
915 | unsigned int size; | |
916 | int stuffed; | |
917 | int error; | |
918 | ||
919 | stuffed = ea_calc_size(ip->i_sbd, es->es_er, &size); | |
920 | ||
921 | if (ea->ea_type == GFS2_EATYPE_UNUSED) { | |
922 | if (GFS2_EA_REC_LEN(ea) < size) | |
923 | return 0; | |
924 | if (!GFS2_EA_IS_STUFFED(ea)) { | |
925 | error = ea_remove_unstuffed(ip, bh, ea, prev, 1); | |
926 | if (error) | |
927 | return error; | |
928 | } | |
929 | es->ea_split = 0; | |
930 | } else if (GFS2_EA_REC_LEN(ea) - GFS2_EA_SIZE(ea) >= size) | |
931 | es->ea_split = 1; | |
932 | else | |
933 | return 0; | |
934 | ||
935 | if (stuffed) { | |
936 | error = ea_set_simple_noalloc(ip, bh, ea, es); | |
937 | if (error) | |
938 | return error; | |
939 | } else { | |
940 | unsigned int blks; | |
941 | ||
942 | es->es_bh = bh; | |
943 | es->es_ea = ea; | |
5c676f6d SW |
944 | blks = 2 + DIV_ROUND_UP(es->es_er->er_data_len, |
945 | ip->i_sbd->sd_jbsize); | |
b3b94faa DT |
946 | |
947 | error = ea_alloc_skeleton(ip, es->es_er, blks, | |
948 | ea_set_simple_alloc, es); | |
949 | if (error) | |
950 | return error; | |
951 | } | |
952 | ||
953 | return 1; | |
954 | } | |
955 | ||
956 | static int ea_set_block(struct gfs2_inode *ip, struct gfs2_ea_request *er, | |
957 | void *private) | |
958 | { | |
959 | struct gfs2_sbd *sdp = ip->i_sbd; | |
960 | struct buffer_head *indbh, *newbh; | |
961 | uint64_t *eablk; | |
962 | int error; | |
963 | int mh_size = sizeof(struct gfs2_meta_header); | |
964 | ||
965 | if (ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT) { | |
966 | uint64_t *end; | |
967 | ||
968 | error = gfs2_meta_read(ip->i_gl, ip->i_di.di_eattr, | |
969 | DIO_START | DIO_WAIT, &indbh); | |
970 | if (error) | |
971 | return error; | |
972 | ||
973 | if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) { | |
974 | error = -EIO; | |
975 | goto out; | |
976 | } | |
977 | ||
978 | eablk = (uint64_t *)(indbh->b_data + mh_size); | |
979 | end = eablk + sdp->sd_inptrs; | |
980 | ||
981 | for (; eablk < end; eablk++) | |
982 | if (!*eablk) | |
983 | break; | |
984 | ||
985 | if (eablk == end) { | |
986 | error = -ENOSPC; | |
987 | goto out; | |
988 | } | |
989 | ||
d4e9c4c3 | 990 | gfs2_trans_add_bh(ip->i_gl, indbh, 1); |
b3b94faa DT |
991 | } else { |
992 | uint64_t blk; | |
993 | ||
994 | blk = gfs2_alloc_meta(ip); | |
995 | ||
996 | indbh = gfs2_meta_new(ip->i_gl, blk); | |
d4e9c4c3 | 997 | gfs2_trans_add_bh(ip->i_gl, indbh, 1); |
b3b94faa DT |
998 | gfs2_metatype_set(indbh, GFS2_METATYPE_IN, GFS2_FORMAT_IN); |
999 | gfs2_buffer_clear_tail(indbh, mh_size); | |
1000 | ||
1001 | eablk = (uint64_t *)(indbh->b_data + mh_size); | |
1002 | *eablk = cpu_to_be64(ip->i_di.di_eattr); | |
1003 | ip->i_di.di_eattr = blk; | |
1004 | ip->i_di.di_flags |= GFS2_DIF_EA_INDIRECT; | |
1005 | ip->i_di.di_blocks++; | |
1006 | ||
1007 | eablk++; | |
1008 | } | |
1009 | ||
1010 | error = ea_alloc_blk(ip, &newbh); | |
1011 | if (error) | |
1012 | goto out; | |
1013 | ||
1014 | *eablk = cpu_to_be64((uint64_t)newbh->b_blocknr); | |
1015 | error = ea_write(ip, GFS2_EA_BH2FIRST(newbh), er); | |
1016 | brelse(newbh); | |
1017 | if (error) | |
1018 | goto out; | |
1019 | ||
1020 | if (private) | |
1021 | ea_set_remove_stuffed(ip, (struct gfs2_ea_location *)private); | |
1022 | ||
1023 | out: | |
1024 | brelse(indbh); | |
1025 | ||
1026 | return error; | |
1027 | } | |
1028 | ||
1029 | static int ea_set_i(struct gfs2_inode *ip, struct gfs2_ea_request *er, | |
1030 | struct gfs2_ea_location *el) | |
1031 | { | |
1032 | struct ea_set es; | |
1033 | unsigned int blks = 2; | |
1034 | int error; | |
1035 | ||
1036 | memset(&es, 0, sizeof(struct ea_set)); | |
1037 | es.es_er = er; | |
1038 | es.es_el = el; | |
1039 | ||
1040 | error = ea_foreach(ip, ea_set_simple, &es); | |
1041 | if (error > 0) | |
1042 | return 0; | |
1043 | if (error) | |
1044 | return error; | |
1045 | ||
1046 | if (!(ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT)) | |
1047 | blks++; | |
1048 | if (GFS2_EAREQ_SIZE_STUFFED(er) > ip->i_sbd->sd_jbsize) | |
5c676f6d | 1049 | blks += DIV_ROUND_UP(er->er_data_len, ip->i_sbd->sd_jbsize); |
b3b94faa DT |
1050 | |
1051 | return ea_alloc_skeleton(ip, er, blks, ea_set_block, el); | |
1052 | } | |
1053 | ||
1054 | static int ea_set_remove_unstuffed(struct gfs2_inode *ip, | |
1055 | struct gfs2_ea_location *el) | |
1056 | { | |
1057 | if (el->el_prev && GFS2_EA2NEXT(el->el_prev) != el->el_ea) { | |
1058 | el->el_prev = GFS2_EA2NEXT(el->el_prev); | |
1059 | gfs2_assert_withdraw(ip->i_sbd, | |
1060 | GFS2_EA2NEXT(el->el_prev) == el->el_ea); | |
1061 | } | |
1062 | ||
1063 | return ea_remove_unstuffed(ip, el->el_bh, el->el_ea, el->el_prev,0); | |
1064 | } | |
1065 | ||
1066 | int gfs2_ea_set_i(struct gfs2_inode *ip, struct gfs2_ea_request *er) | |
1067 | { | |
1068 | struct gfs2_ea_location el; | |
1069 | int error; | |
1070 | ||
1071 | if (!ip->i_di.di_eattr) { | |
1072 | if (er->er_flags & XATTR_REPLACE) | |
1073 | return -ENODATA; | |
1074 | return ea_init(ip, er); | |
1075 | } | |
1076 | ||
1077 | error = gfs2_ea_find(ip, er, &el); | |
1078 | if (error) | |
1079 | return error; | |
1080 | ||
1081 | if (el.el_ea) { | |
1082 | if (ip->i_di.di_flags & GFS2_DIF_APPENDONLY) { | |
1083 | brelse(el.el_bh); | |
1084 | return -EPERM; | |
1085 | } | |
1086 | ||
1087 | error = -EEXIST; | |
1088 | if (!(er->er_flags & XATTR_CREATE)) { | |
1089 | int unstuffed = !GFS2_EA_IS_STUFFED(el.el_ea); | |
1090 | error = ea_set_i(ip, er, &el); | |
1091 | if (!error && unstuffed) | |
1092 | ea_set_remove_unstuffed(ip, &el); | |
1093 | } | |
1094 | ||
1095 | brelse(el.el_bh); | |
1096 | } else { | |
1097 | error = -ENODATA; | |
1098 | if (!(er->er_flags & XATTR_REPLACE)) | |
1099 | error = ea_set_i(ip, er, NULL); | |
1100 | } | |
1101 | ||
1102 | return error; | |
1103 | } | |
1104 | ||
1105 | int gfs2_ea_set(struct gfs2_inode *ip, struct gfs2_ea_request *er) | |
1106 | { | |
1107 | struct gfs2_holder i_gh; | |
1108 | int error; | |
1109 | ||
1110 | if (!er->er_name_len || | |
1111 | er->er_name_len > GFS2_EA_MAX_NAME_LEN) | |
1112 | return -EINVAL; | |
1113 | if (!er->er_data || !er->er_data_len) { | |
1114 | er->er_data = NULL; | |
1115 | er->er_data_len = 0; | |
1116 | } | |
1117 | error = ea_check_size(ip->i_sbd, er); | |
1118 | if (error) | |
1119 | return error; | |
1120 | ||
1121 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); | |
1122 | if (error) | |
1123 | return error; | |
1124 | ||
1125 | if (IS_IMMUTABLE(ip->i_vnode)) | |
1126 | error = -EPERM; | |
1127 | else | |
1128 | error = gfs2_ea_ops[er->er_type]->eo_set(ip, er); | |
1129 | ||
1130 | gfs2_glock_dq_uninit(&i_gh); | |
1131 | ||
1132 | return error; | |
1133 | } | |
1134 | ||
1135 | static int ea_remove_stuffed(struct gfs2_inode *ip, struct gfs2_ea_location *el) | |
1136 | { | |
1137 | struct gfs2_ea_header *ea = el->el_ea; | |
1138 | struct gfs2_ea_header *prev = el->el_prev; | |
1139 | struct buffer_head *dibh; | |
1140 | int error; | |
1141 | ||
1142 | error = gfs2_trans_begin(ip->i_sbd, RES_DINODE + RES_EATTR, 0); | |
1143 | if (error) | |
1144 | return error; | |
1145 | ||
d4e9c4c3 | 1146 | gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1); |
b3b94faa DT |
1147 | |
1148 | if (prev) { | |
1149 | uint32_t len; | |
1150 | ||
1151 | len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea); | |
1152 | prev->ea_rec_len = cpu_to_be32(len); | |
1153 | ||
1154 | if (GFS2_EA_IS_LAST(ea)) | |
1155 | prev->ea_flags |= GFS2_EAFLAG_LAST; | |
1156 | } else | |
1157 | ea->ea_type = GFS2_EATYPE_UNUSED; | |
1158 | ||
1159 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1160 | if (!error) { | |
1161 | ip->i_di.di_ctime = get_seconds(); | |
d4e9c4c3 | 1162 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
b3b94faa DT |
1163 | gfs2_dinode_out(&ip->i_di, dibh->b_data); |
1164 | brelse(dibh); | |
1165 | } | |
1166 | ||
1167 | gfs2_trans_end(ip->i_sbd); | |
1168 | ||
1169 | return error; | |
1170 | } | |
1171 | ||
1172 | int gfs2_ea_remove_i(struct gfs2_inode *ip, struct gfs2_ea_request *er) | |
1173 | { | |
1174 | struct gfs2_ea_location el; | |
1175 | int error; | |
1176 | ||
1177 | if (!ip->i_di.di_eattr) | |
1178 | return -ENODATA; | |
1179 | ||
1180 | error = gfs2_ea_find(ip, er, &el); | |
1181 | if (error) | |
1182 | return error; | |
1183 | if (!el.el_ea) | |
1184 | return -ENODATA; | |
1185 | ||
1186 | if (GFS2_EA_IS_STUFFED(el.el_ea)) | |
1187 | error = ea_remove_stuffed(ip, &el); | |
1188 | else | |
1189 | error = ea_remove_unstuffed(ip, el.el_bh, el.el_ea, el.el_prev, | |
1190 | 0); | |
1191 | ||
1192 | brelse(el.el_bh); | |
1193 | ||
1194 | return error; | |
1195 | } | |
1196 | ||
1197 | /** | |
1198 | * gfs2_ea_remove - sets (or creates or replaces) an extended attribute | |
1199 | * @ip: pointer to the inode of the target file | |
1200 | * @er: request information | |
1201 | * | |
1202 | * Returns: errno | |
1203 | */ | |
1204 | ||
1205 | int gfs2_ea_remove(struct gfs2_inode *ip, struct gfs2_ea_request *er) | |
1206 | { | |
1207 | struct gfs2_holder i_gh; | |
1208 | int error; | |
1209 | ||
1210 | if (!er->er_name_len || er->er_name_len > GFS2_EA_MAX_NAME_LEN) | |
1211 | return -EINVAL; | |
1212 | ||
1213 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); | |
1214 | if (error) | |
1215 | return error; | |
1216 | ||
1217 | if (IS_IMMUTABLE(ip->i_vnode) || IS_APPEND(ip->i_vnode)) | |
1218 | error = -EPERM; | |
1219 | else | |
1220 | error = gfs2_ea_ops[er->er_type]->eo_remove(ip, er); | |
1221 | ||
1222 | gfs2_glock_dq_uninit(&i_gh); | |
1223 | ||
1224 | return error; | |
1225 | } | |
1226 | ||
1227 | static int ea_acl_chmod_unstuffed(struct gfs2_inode *ip, | |
1228 | struct gfs2_ea_header *ea, char *data) | |
1229 | { | |
1230 | struct gfs2_sbd *sdp = ip->i_sbd; | |
1231 | struct buffer_head **bh; | |
1232 | unsigned int amount = GFS2_EA_DATA_LEN(ea); | |
5c676f6d | 1233 | unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize); |
b3b94faa DT |
1234 | uint64_t *dataptrs = GFS2_EA2DATAPTRS(ea); |
1235 | unsigned int x; | |
1236 | int error; | |
1237 | ||
1238 | bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_KERNEL); | |
1239 | if (!bh) | |
1240 | return -ENOMEM; | |
1241 | ||
1242 | error = gfs2_trans_begin(sdp, nptrs + RES_DINODE, 0); | |
1243 | if (error) | |
1244 | goto out; | |
1245 | ||
1246 | for (x = 0; x < nptrs; x++) { | |
1247 | error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs), | |
1248 | DIO_START, bh + x); | |
1249 | if (error) { | |
1250 | while (x--) | |
1251 | brelse(bh[x]); | |
1252 | goto fail; | |
1253 | } | |
1254 | dataptrs++; | |
1255 | } | |
1256 | ||
1257 | for (x = 0; x < nptrs; x++) { | |
1258 | error = gfs2_meta_reread(sdp, bh[x], DIO_WAIT); | |
1259 | if (error) { | |
1260 | for (; x < nptrs; x++) | |
1261 | brelse(bh[x]); | |
1262 | goto fail; | |
1263 | } | |
1264 | if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) { | |
1265 | for (; x < nptrs; x++) | |
1266 | brelse(bh[x]); | |
1267 | error = -EIO; | |
1268 | goto fail; | |
1269 | } | |
1270 | ||
d4e9c4c3 | 1271 | gfs2_trans_add_bh(ip->i_gl, bh[x], 1); |
b3b94faa DT |
1272 | |
1273 | memcpy(bh[x]->b_data + sizeof(struct gfs2_meta_header), | |
1274 | data, | |
1275 | (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize); | |
1276 | ||
1277 | amount -= sdp->sd_jbsize; | |
1278 | data += sdp->sd_jbsize; | |
1279 | ||
1280 | brelse(bh[x]); | |
1281 | } | |
1282 | ||
1283 | out: | |
1284 | kfree(bh); | |
1285 | ||
1286 | return error; | |
1287 | ||
1288 | fail: | |
1289 | gfs2_trans_end(sdp); | |
1290 | kfree(bh); | |
1291 | ||
1292 | return error; | |
1293 | } | |
1294 | ||
1295 | int gfs2_ea_acl_chmod(struct gfs2_inode *ip, struct gfs2_ea_location *el, | |
1296 | struct iattr *attr, char *data) | |
1297 | { | |
1298 | struct buffer_head *dibh; | |
1299 | int error; | |
1300 | ||
1301 | if (GFS2_EA_IS_STUFFED(el->el_ea)) { | |
1302 | error = gfs2_trans_begin(ip->i_sbd, RES_DINODE + RES_EATTR, 0); | |
1303 | if (error) | |
1304 | return error; | |
1305 | ||
d4e9c4c3 | 1306 | gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1); |
b3b94faa DT |
1307 | memcpy(GFS2_EA2DATA(el->el_ea), |
1308 | data, | |
1309 | GFS2_EA_DATA_LEN(el->el_ea)); | |
1310 | } else | |
1311 | error = ea_acl_chmod_unstuffed(ip, el->el_ea, data); | |
1312 | ||
1313 | if (error) | |
1314 | return error; | |
1315 | ||
1316 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1317 | if (!error) { | |
1318 | error = inode_setattr(ip->i_vnode, attr); | |
1319 | gfs2_assert_warn(ip->i_sbd, !error); | |
1320 | gfs2_inode_attr_out(ip); | |
d4e9c4c3 | 1321 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
b3b94faa DT |
1322 | gfs2_dinode_out(&ip->i_di, dibh->b_data); |
1323 | brelse(dibh); | |
1324 | } | |
1325 | ||
1326 | gfs2_trans_end(ip->i_sbd); | |
1327 | ||
1328 | return error; | |
1329 | } | |
1330 | ||
1331 | static int ea_dealloc_indirect(struct gfs2_inode *ip) | |
1332 | { | |
1333 | struct gfs2_sbd *sdp = ip->i_sbd; | |
1334 | struct gfs2_rgrp_list rlist; | |
1335 | struct buffer_head *indbh, *dibh; | |
1336 | uint64_t *eablk, *end; | |
1337 | unsigned int rg_blocks = 0; | |
1338 | uint64_t bstart = 0; | |
1339 | unsigned int blen = 0; | |
1340 | unsigned int blks = 0; | |
1341 | unsigned int x; | |
1342 | int error; | |
1343 | ||
1344 | memset(&rlist, 0, sizeof(struct gfs2_rgrp_list)); | |
1345 | ||
1346 | error = gfs2_meta_read(ip->i_gl, ip->i_di.di_eattr, | |
1347 | DIO_START | DIO_WAIT, &indbh); | |
1348 | if (error) | |
1349 | return error; | |
1350 | ||
1351 | if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) { | |
1352 | error = -EIO; | |
1353 | goto out; | |
1354 | } | |
1355 | ||
1356 | eablk = (uint64_t *)(indbh->b_data + sizeof(struct gfs2_meta_header)); | |
1357 | end = eablk + sdp->sd_inptrs; | |
1358 | ||
1359 | for (; eablk < end; eablk++) { | |
1360 | uint64_t bn; | |
1361 | ||
1362 | if (!*eablk) | |
1363 | break; | |
1364 | bn = be64_to_cpu(*eablk); | |
1365 | ||
1366 | if (bstart + blen == bn) | |
1367 | blen++; | |
1368 | else { | |
1369 | if (bstart) | |
1370 | gfs2_rlist_add(sdp, &rlist, bstart); | |
1371 | bstart = bn; | |
1372 | blen = 1; | |
1373 | } | |
1374 | blks++; | |
1375 | } | |
1376 | if (bstart) | |
1377 | gfs2_rlist_add(sdp, &rlist, bstart); | |
1378 | else | |
1379 | goto out; | |
1380 | ||
1381 | gfs2_rlist_alloc(&rlist, LM_ST_EXCLUSIVE, 0); | |
1382 | ||
1383 | for (x = 0; x < rlist.rl_rgrps; x++) { | |
1384 | struct gfs2_rgrpd *rgd; | |
5c676f6d | 1385 | rgd = rlist.rl_ghs[x].gh_gl->gl_object; |
b3b94faa DT |
1386 | rg_blocks += rgd->rd_ri.ri_length; |
1387 | } | |
1388 | ||
1389 | error = gfs2_glock_nq_m(rlist.rl_rgrps, rlist.rl_ghs); | |
1390 | if (error) | |
1391 | goto out_rlist_free; | |
1392 | ||
1393 | error = gfs2_trans_begin(sdp, rg_blocks + RES_DINODE + | |
1394 | RES_INDIRECT + RES_STATFS + | |
1395 | RES_QUOTA, blks); | |
1396 | if (error) | |
1397 | goto out_gunlock; | |
1398 | ||
d4e9c4c3 | 1399 | gfs2_trans_add_bh(ip->i_gl, indbh, 1); |
b3b94faa DT |
1400 | |
1401 | eablk = (uint64_t *)(indbh->b_data + sizeof(struct gfs2_meta_header)); | |
1402 | bstart = 0; | |
1403 | blen = 0; | |
1404 | ||
1405 | for (; eablk < end; eablk++) { | |
1406 | uint64_t bn; | |
1407 | ||
1408 | if (!*eablk) | |
1409 | break; | |
1410 | bn = be64_to_cpu(*eablk); | |
1411 | ||
1412 | if (bstart + blen == bn) | |
1413 | blen++; | |
1414 | else { | |
1415 | if (bstart) | |
1416 | gfs2_free_meta(ip, bstart, blen); | |
1417 | bstart = bn; | |
1418 | blen = 1; | |
1419 | } | |
1420 | ||
1421 | *eablk = 0; | |
1422 | if (!ip->i_di.di_blocks) | |
1423 | gfs2_consist_inode(ip); | |
1424 | ip->i_di.di_blocks--; | |
1425 | } | |
1426 | if (bstart) | |
1427 | gfs2_free_meta(ip, bstart, blen); | |
1428 | ||
1429 | ip->i_di.di_flags &= ~GFS2_DIF_EA_INDIRECT; | |
1430 | ||
1431 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1432 | if (!error) { | |
d4e9c4c3 | 1433 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
b3b94faa DT |
1434 | gfs2_dinode_out(&ip->i_di, dibh->b_data); |
1435 | brelse(dibh); | |
1436 | } | |
1437 | ||
1438 | gfs2_trans_end(sdp); | |
1439 | ||
1440 | out_gunlock: | |
1441 | gfs2_glock_dq_m(rlist.rl_rgrps, rlist.rl_ghs); | |
1442 | ||
1443 | out_rlist_free: | |
1444 | gfs2_rlist_free(&rlist); | |
1445 | ||
1446 | out: | |
1447 | brelse(indbh); | |
1448 | ||
1449 | return error; | |
1450 | } | |
1451 | ||
1452 | static int ea_dealloc_block(struct gfs2_inode *ip) | |
1453 | { | |
1454 | struct gfs2_sbd *sdp = ip->i_sbd; | |
1455 | struct gfs2_alloc *al = &ip->i_alloc; | |
1456 | struct gfs2_rgrpd *rgd; | |
1457 | struct buffer_head *dibh; | |
1458 | int error; | |
1459 | ||
1460 | rgd = gfs2_blk2rgrpd(sdp, ip->i_di.di_eattr); | |
1461 | if (!rgd) { | |
1462 | gfs2_consist_inode(ip); | |
1463 | return -EIO; | |
1464 | } | |
1465 | ||
1466 | error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, | |
1467 | &al->al_rgd_gh); | |
1468 | if (error) | |
1469 | return error; | |
1470 | ||
1471 | error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_DINODE + | |
1472 | RES_STATFS + RES_QUOTA, 1); | |
1473 | if (error) | |
1474 | goto out_gunlock; | |
1475 | ||
1476 | gfs2_free_meta(ip, ip->i_di.di_eattr, 1); | |
1477 | ||
1478 | ip->i_di.di_eattr = 0; | |
1479 | if (!ip->i_di.di_blocks) | |
1480 | gfs2_consist_inode(ip); | |
1481 | ip->i_di.di_blocks--; | |
1482 | ||
1483 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1484 | if (!error) { | |
d4e9c4c3 | 1485 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
b3b94faa DT |
1486 | gfs2_dinode_out(&ip->i_di, dibh->b_data); |
1487 | brelse(dibh); | |
1488 | } | |
1489 | ||
1490 | gfs2_trans_end(sdp); | |
1491 | ||
1492 | out_gunlock: | |
1493 | gfs2_glock_dq_uninit(&al->al_rgd_gh); | |
1494 | ||
1495 | return error; | |
1496 | } | |
1497 | ||
1498 | /** | |
1499 | * gfs2_ea_dealloc - deallocate the extended attribute fork | |
1500 | * @ip: the inode | |
1501 | * | |
1502 | * Returns: errno | |
1503 | */ | |
1504 | ||
1505 | int gfs2_ea_dealloc(struct gfs2_inode *ip) | |
1506 | { | |
1507 | struct gfs2_alloc *al; | |
1508 | int error; | |
1509 | ||
1510 | al = gfs2_alloc_get(ip); | |
1511 | ||
1512 | error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE); | |
1513 | if (error) | |
1514 | goto out_alloc; | |
1515 | ||
1516 | error = gfs2_rindex_hold(ip->i_sbd, &al->al_ri_gh); | |
1517 | if (error) | |
1518 | goto out_quota; | |
1519 | ||
1520 | error = ea_foreach(ip, ea_dealloc_unstuffed, NULL); | |
1521 | if (error) | |
1522 | goto out_rindex; | |
1523 | ||
1524 | if (ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT) { | |
1525 | error = ea_dealloc_indirect(ip); | |
1526 | if (error) | |
1527 | goto out_rindex; | |
1528 | } | |
1529 | ||
1530 | error = ea_dealloc_block(ip); | |
1531 | ||
1532 | out_rindex: | |
1533 | gfs2_glock_dq_uninit(&al->al_ri_gh); | |
1534 | ||
1535 | out_quota: | |
1536 | gfs2_quota_unhold(ip); | |
1537 | ||
1538 | out_alloc: | |
1539 | gfs2_alloc_put(ip); | |
1540 | ||
1541 | return error; | |
1542 | } | |
1543 |