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b3b94faa DT |
1 | /* |
2 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. | |
3 | * Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved. | |
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> | |
16 | #include <asm/semaphore.h> | |
17 | #include <asm/uaccess.h> | |
18 | ||
19 | #include "gfs2.h" | |
20 | #include "acl.h" | |
21 | #include "eaops.h" | |
22 | #include "eattr.h" | |
23 | #include "glock.h" | |
24 | #include "inode.h" | |
25 | #include "meta_io.h" | |
26 | #include "quota.h" | |
27 | #include "rgrp.h" | |
28 | #include "trans.h" | |
29 | ||
30 | /** | |
31 | * ea_calc_size - returns the acutal number of bytes the request will take up | |
32 | * (not counting any unstuffed data blocks) | |
33 | * @sdp: | |
34 | * @er: | |
35 | * @size: | |
36 | * | |
37 | * Returns: 1 if the EA should be stuffed | |
38 | */ | |
39 | ||
40 | static int ea_calc_size(struct gfs2_sbd *sdp, struct gfs2_ea_request *er, | |
41 | unsigned int *size) | |
42 | { | |
43 | *size = GFS2_EAREQ_SIZE_STUFFED(er); | |
44 | if (*size <= sdp->sd_jbsize) | |
45 | return 1; | |
46 | ||
47 | *size = GFS2_EAREQ_SIZE_UNSTUFFED(sdp, er); | |
48 | ||
49 | return 0; | |
50 | } | |
51 | ||
52 | static int ea_check_size(struct gfs2_sbd *sdp, struct gfs2_ea_request *er) | |
53 | { | |
54 | unsigned int size; | |
55 | ||
56 | if (er->er_data_len > GFS2_EA_MAX_DATA_LEN) | |
57 | return -ERANGE; | |
58 | ||
59 | ea_calc_size(sdp, er, &size); | |
60 | ||
61 | /* This can only happen with 512 byte blocks */ | |
62 | if (size > sdp->sd_jbsize) | |
63 | return -ERANGE; | |
64 | ||
65 | return 0; | |
66 | } | |
67 | ||
68 | typedef int (*ea_call_t) (struct gfs2_inode *ip, | |
69 | struct buffer_head *bh, | |
70 | struct gfs2_ea_header *ea, | |
71 | struct gfs2_ea_header *prev, | |
72 | void *private); | |
73 | ||
74 | static int ea_foreach_i(struct gfs2_inode *ip, struct buffer_head *bh, | |
75 | ea_call_t ea_call, void *data) | |
76 | { | |
77 | struct gfs2_ea_header *ea, *prev = NULL; | |
78 | int error = 0; | |
79 | ||
80 | if (gfs2_metatype_check(ip->i_sbd, bh, GFS2_METATYPE_EA)) | |
81 | return -EIO; | |
82 | ||
83 | for (ea = GFS2_EA_BH2FIRST(bh);; prev = ea, ea = GFS2_EA2NEXT(ea)) { | |
84 | if (!GFS2_EA_REC_LEN(ea)) | |
85 | goto fail; | |
86 | if (!(bh->b_data <= (char *)ea && | |
87 | (char *)GFS2_EA2NEXT(ea) <= | |
88 | bh->b_data + bh->b_size)) | |
89 | goto fail; | |
90 | if (!GFS2_EATYPE_VALID(ea->ea_type)) | |
91 | goto fail; | |
92 | ||
93 | error = ea_call(ip, bh, ea, prev, data); | |
94 | if (error) | |
95 | return error; | |
96 | ||
97 | if (GFS2_EA_IS_LAST(ea)) { | |
98 | if ((char *)GFS2_EA2NEXT(ea) != | |
99 | bh->b_data + bh->b_size) | |
100 | goto fail; | |
101 | break; | |
102 | } | |
103 | } | |
104 | ||
105 | return error; | |
106 | ||
107 | fail: | |
108 | gfs2_consist_inode(ip); | |
109 | return -EIO; | |
110 | } | |
111 | ||
112 | static int ea_foreach(struct gfs2_inode *ip, ea_call_t ea_call, void *data) | |
113 | { | |
114 | struct buffer_head *bh, *eabh; | |
115 | uint64_t *eablk, *end; | |
116 | int error; | |
117 | ||
118 | error = gfs2_meta_read(ip->i_gl, ip->i_di.di_eattr, | |
119 | DIO_START | DIO_WAIT, &bh); | |
120 | if (error) | |
121 | return error; | |
122 | ||
123 | if (!(ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT)) { | |
124 | error = ea_foreach_i(ip, bh, ea_call, data); | |
125 | goto out; | |
126 | } | |
127 | ||
128 | if (gfs2_metatype_check(ip->i_sbd, bh, GFS2_METATYPE_IN)) { | |
129 | error = -EIO; | |
130 | goto out; | |
131 | } | |
132 | ||
133 | eablk = (uint64_t *)(bh->b_data + sizeof(struct gfs2_meta_header)); | |
134 | end = eablk + ip->i_sbd->sd_inptrs; | |
135 | ||
136 | for (; eablk < end; eablk++) { | |
137 | uint64_t bn; | |
138 | ||
139 | if (!*eablk) | |
140 | break; | |
141 | bn = be64_to_cpu(*eablk); | |
142 | ||
143 | error = gfs2_meta_read(ip->i_gl, bn, DIO_START | DIO_WAIT, | |
144 | &eabh); | |
145 | if (error) | |
146 | break; | |
147 | error = ea_foreach_i(ip, eabh, ea_call, data); | |
148 | brelse(eabh); | |
149 | if (error) | |
150 | break; | |
151 | } | |
152 | out: | |
153 | brelse(bh); | |
154 | ||
155 | return error; | |
156 | } | |
157 | ||
158 | struct ea_find { | |
159 | struct gfs2_ea_request *ef_er; | |
160 | struct gfs2_ea_location *ef_el; | |
161 | }; | |
162 | ||
163 | static int ea_find_i(struct gfs2_inode *ip, struct buffer_head *bh, | |
164 | struct gfs2_ea_header *ea, struct gfs2_ea_header *prev, | |
165 | void *private) | |
166 | { | |
167 | struct ea_find *ef = private; | |
168 | struct gfs2_ea_request *er = ef->ef_er; | |
169 | ||
170 | if (ea->ea_type == GFS2_EATYPE_UNUSED) | |
171 | return 0; | |
172 | ||
173 | if (ea->ea_type == er->er_type) { | |
174 | if (ea->ea_name_len == er->er_name_len && | |
175 | !memcmp(GFS2_EA2NAME(ea), er->er_name, ea->ea_name_len)) { | |
176 | struct gfs2_ea_location *el = ef->ef_el; | |
177 | get_bh(bh); | |
178 | el->el_bh = bh; | |
179 | el->el_ea = ea; | |
180 | el->el_prev = prev; | |
181 | return 1; | |
182 | } | |
183 | } | |
184 | ||
185 | #if 0 | |
186 | else if ((ip->i_di.di_flags & GFS2_DIF_EA_PACKED) && | |
187 | er->er_type == GFS2_EATYPE_SYS) | |
188 | return 1; | |
189 | #endif | |
190 | ||
191 | return 0; | |
192 | } | |
193 | ||
194 | int gfs2_ea_find(struct gfs2_inode *ip, struct gfs2_ea_request *er, | |
195 | struct gfs2_ea_location *el) | |
196 | { | |
197 | struct ea_find ef; | |
198 | int error; | |
199 | ||
200 | ef.ef_er = er; | |
201 | ef.ef_el = el; | |
202 | ||
203 | memset(el, 0, sizeof(struct gfs2_ea_location)); | |
204 | ||
205 | error = ea_foreach(ip, ea_find_i, &ef); | |
206 | if (error > 0) | |
207 | return 0; | |
208 | ||
209 | return error; | |
210 | } | |
211 | ||
212 | /** | |
213 | * ea_dealloc_unstuffed - | |
214 | * @ip: | |
215 | * @bh: | |
216 | * @ea: | |
217 | * @prev: | |
218 | * @private: | |
219 | * | |
220 | * Take advantage of the fact that all unstuffed blocks are | |
221 | * allocated from the same RG. But watch, this may not always | |
222 | * be true. | |
223 | * | |
224 | * Returns: errno | |
225 | */ | |
226 | ||
227 | static int ea_dealloc_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh, | |
228 | struct gfs2_ea_header *ea, | |
229 | struct gfs2_ea_header *prev, void *private) | |
230 | { | |
231 | int *leave = private; | |
232 | struct gfs2_sbd *sdp = ip->i_sbd; | |
233 | struct gfs2_rgrpd *rgd; | |
234 | struct gfs2_holder rg_gh; | |
235 | struct buffer_head *dibh; | |
236 | uint64_t *dataptrs, bn = 0; | |
237 | uint64_t bstart = 0; | |
238 | unsigned int blen = 0; | |
239 | unsigned int blks = 0; | |
240 | unsigned int x; | |
241 | int error; | |
242 | ||
243 | if (GFS2_EA_IS_STUFFED(ea)) | |
244 | return 0; | |
245 | ||
246 | dataptrs = GFS2_EA2DATAPTRS(ea); | |
247 | for (x = 0; x < ea->ea_num_ptrs; x++, dataptrs++) | |
248 | if (*dataptrs) { | |
249 | blks++; | |
250 | bn = be64_to_cpu(*dataptrs); | |
251 | } | |
252 | if (!blks) | |
253 | return 0; | |
254 | ||
255 | rgd = gfs2_blk2rgrpd(sdp, bn); | |
256 | if (!rgd) { | |
257 | gfs2_consist_inode(ip); | |
258 | return -EIO; | |
259 | } | |
260 | ||
261 | error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &rg_gh); | |
262 | if (error) | |
263 | return error; | |
264 | ||
265 | error = gfs2_trans_begin(sdp, rgd->rd_ri.ri_length + | |
266 | RES_DINODE + RES_EATTR + RES_STATFS + | |
267 | RES_QUOTA, blks); | |
268 | if (error) | |
269 | goto out_gunlock; | |
270 | ||
d4e9c4c3 | 271 | gfs2_trans_add_bh(ip->i_gl, bh, 1); |
b3b94faa DT |
272 | |
273 | dataptrs = GFS2_EA2DATAPTRS(ea); | |
274 | for (x = 0; x < ea->ea_num_ptrs; x++, dataptrs++) { | |
275 | if (!*dataptrs) | |
276 | break; | |
277 | bn = be64_to_cpu(*dataptrs); | |
278 | ||
279 | if (bstart + blen == bn) | |
280 | blen++; | |
281 | else { | |
282 | if (bstart) | |
283 | gfs2_free_meta(ip, bstart, blen); | |
284 | bstart = bn; | |
285 | blen = 1; | |
286 | } | |
287 | ||
288 | *dataptrs = 0; | |
289 | if (!ip->i_di.di_blocks) | |
290 | gfs2_consist_inode(ip); | |
291 | ip->i_di.di_blocks--; | |
292 | } | |
293 | if (bstart) | |
294 | gfs2_free_meta(ip, bstart, blen); | |
295 | ||
296 | if (prev && !leave) { | |
297 | uint32_t len; | |
298 | ||
299 | len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea); | |
300 | prev->ea_rec_len = cpu_to_be32(len); | |
301 | ||
302 | if (GFS2_EA_IS_LAST(ea)) | |
303 | prev->ea_flags |= GFS2_EAFLAG_LAST; | |
304 | } else { | |
305 | ea->ea_type = GFS2_EATYPE_UNUSED; | |
306 | ea->ea_num_ptrs = 0; | |
307 | } | |
308 | ||
309 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
310 | if (!error) { | |
311 | ip->i_di.di_ctime = get_seconds(); | |
d4e9c4c3 | 312 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
b3b94faa DT |
313 | gfs2_dinode_out(&ip->i_di, dibh->b_data); |
314 | brelse(dibh); | |
315 | } | |
316 | ||
317 | gfs2_trans_end(sdp); | |
318 | ||
319 | out_gunlock: | |
320 | gfs2_glock_dq_uninit(&rg_gh); | |
321 | ||
322 | return error; | |
323 | } | |
324 | ||
325 | static int ea_remove_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh, | |
326 | struct gfs2_ea_header *ea, | |
327 | struct gfs2_ea_header *prev, int leave) | |
328 | { | |
329 | struct gfs2_alloc *al; | |
330 | int error; | |
331 | ||
332 | al = gfs2_alloc_get(ip); | |
333 | ||
334 | error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE); | |
335 | if (error) | |
336 | goto out_alloc; | |
337 | ||
338 | error = gfs2_rindex_hold(ip->i_sbd, &al->al_ri_gh); | |
339 | if (error) | |
340 | goto out_quota; | |
341 | ||
342 | error = ea_dealloc_unstuffed(ip, | |
343 | bh, ea, prev, | |
344 | (leave) ? &error : NULL); | |
345 | ||
346 | gfs2_glock_dq_uninit(&al->al_ri_gh); | |
347 | ||
348 | out_quota: | |
349 | gfs2_quota_unhold(ip); | |
350 | ||
351 | out_alloc: | |
352 | gfs2_alloc_put(ip); | |
353 | ||
354 | return error; | |
355 | } | |
356 | ||
357 | /******************************************************************************/ | |
358 | ||
359 | static int gfs2_ea_repack_i(struct gfs2_inode *ip) | |
360 | { | |
361 | return -EOPNOTSUPP; | |
362 | } | |
363 | ||
364 | int gfs2_ea_repack(struct gfs2_inode *ip) | |
365 | { | |
366 | struct gfs2_holder gh; | |
367 | int error; | |
368 | ||
369 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); | |
370 | if (error) | |
371 | return error; | |
372 | ||
373 | /* Some sort of permissions checking would be nice */ | |
374 | ||
375 | error = gfs2_ea_repack_i(ip); | |
376 | ||
377 | gfs2_glock_dq_uninit(&gh); | |
378 | ||
379 | return error; | |
380 | } | |
381 | ||
382 | struct ea_list { | |
383 | struct gfs2_ea_request *ei_er; | |
384 | unsigned int ei_size; | |
385 | }; | |
386 | ||
387 | static int ea_list_i(struct gfs2_inode *ip, struct buffer_head *bh, | |
388 | struct gfs2_ea_header *ea, struct gfs2_ea_header *prev, | |
389 | void *private) | |
390 | { | |
391 | struct ea_list *ei = private; | |
392 | struct gfs2_ea_request *er = ei->ei_er; | |
393 | unsigned int ea_size = GFS2_EA_STRLEN(ea); | |
394 | ||
395 | if (ea->ea_type == GFS2_EATYPE_UNUSED) | |
396 | return 0; | |
397 | ||
398 | if (er->er_data_len) { | |
399 | char *prefix; | |
400 | unsigned int l; | |
401 | char c = 0; | |
402 | ||
403 | if (ei->ei_size + ea_size > er->er_data_len) | |
404 | return -ERANGE; | |
405 | ||
406 | if (ea->ea_type == GFS2_EATYPE_USR) { | |
407 | prefix = "user."; | |
408 | l = 5; | |
409 | } else { | |
410 | prefix = "system."; | |
411 | l = 7; | |
412 | } | |
413 | ||
414 | memcpy(er->er_data + ei->ei_size, | |
415 | prefix, l); | |
416 | memcpy(er->er_data + ei->ei_size + l, | |
417 | GFS2_EA2NAME(ea), | |
418 | ea->ea_name_len); | |
419 | memcpy(er->er_data + ei->ei_size + | |
420 | ea_size - 1, | |
421 | &c, 1); | |
422 | } | |
423 | ||
424 | ei->ei_size += ea_size; | |
425 | ||
426 | return 0; | |
427 | } | |
428 | ||
429 | /** | |
430 | * gfs2_ea_list - | |
431 | * @ip: | |
432 | * @er: | |
433 | * | |
434 | * Returns: actual size of data on success, -errno on error | |
435 | */ | |
436 | ||
437 | int gfs2_ea_list(struct gfs2_inode *ip, struct gfs2_ea_request *er) | |
438 | { | |
439 | struct gfs2_holder i_gh; | |
440 | int error; | |
441 | ||
442 | if (!er->er_data || !er->er_data_len) { | |
443 | er->er_data = NULL; | |
444 | er->er_data_len = 0; | |
445 | } | |
446 | ||
447 | error = gfs2_glock_nq_init(ip->i_gl, | |
448 | LM_ST_SHARED, LM_FLAG_ANY, | |
449 | &i_gh); | |
450 | if (error) | |
451 | return error; | |
452 | ||
453 | if (ip->i_di.di_eattr) { | |
454 | struct ea_list ei = { .ei_er = er, .ei_size = 0 }; | |
455 | ||
456 | error = ea_foreach(ip, ea_list_i, &ei); | |
457 | if (!error) | |
458 | error = ei.ei_size; | |
459 | } | |
460 | ||
461 | gfs2_glock_dq_uninit(&i_gh); | |
462 | ||
463 | return error; | |
464 | } | |
465 | ||
466 | /** | |
467 | * ea_get_unstuffed - actually copies the unstuffed data into the | |
468 | * request buffer | |
469 | * @ip: | |
470 | * @ea: | |
471 | * @data: | |
472 | * | |
473 | * Returns: errno | |
474 | */ | |
475 | ||
476 | static int ea_get_unstuffed(struct gfs2_inode *ip, struct gfs2_ea_header *ea, | |
477 | char *data) | |
478 | { | |
479 | struct gfs2_sbd *sdp = ip->i_sbd; | |
480 | struct buffer_head **bh; | |
481 | unsigned int amount = GFS2_EA_DATA_LEN(ea); | |
482 | unsigned int nptrs = DIV_RU(amount, sdp->sd_jbsize); | |
483 | uint64_t *dataptrs = GFS2_EA2DATAPTRS(ea); | |
484 | unsigned int x; | |
485 | int error = 0; | |
486 | ||
487 | bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_KERNEL); | |
488 | if (!bh) | |
489 | return -ENOMEM; | |
490 | ||
491 | for (x = 0; x < nptrs; x++) { | |
492 | error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs), | |
493 | DIO_START, bh + x); | |
494 | if (error) { | |
495 | while (x--) | |
496 | brelse(bh[x]); | |
497 | goto out; | |
498 | } | |
499 | dataptrs++; | |
500 | } | |
501 | ||
502 | for (x = 0; x < nptrs; x++) { | |
503 | error = gfs2_meta_reread(sdp, bh[x], DIO_WAIT); | |
504 | if (error) { | |
505 | for (; x < nptrs; x++) | |
506 | brelse(bh[x]); | |
507 | goto out; | |
508 | } | |
509 | if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) { | |
510 | for (; x < nptrs; x++) | |
511 | brelse(bh[x]); | |
512 | error = -EIO; | |
513 | goto out; | |
514 | } | |
515 | ||
516 | memcpy(data, | |
517 | bh[x]->b_data + sizeof(struct gfs2_meta_header), | |
518 | (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize); | |
519 | ||
520 | amount -= sdp->sd_jbsize; | |
521 | data += sdp->sd_jbsize; | |
522 | ||
523 | brelse(bh[x]); | |
524 | } | |
525 | ||
526 | out: | |
527 | kfree(bh); | |
528 | ||
529 | return error; | |
530 | } | |
531 | ||
532 | int gfs2_ea_get_copy(struct gfs2_inode *ip, struct gfs2_ea_location *el, | |
533 | char *data) | |
534 | { | |
535 | if (GFS2_EA_IS_STUFFED(el->el_ea)) { | |
536 | memcpy(data, | |
537 | GFS2_EA2DATA(el->el_ea), | |
538 | GFS2_EA_DATA_LEN(el->el_ea)); | |
539 | return 0; | |
540 | } else | |
541 | return ea_get_unstuffed(ip, el->el_ea, data); | |
542 | } | |
543 | ||
544 | /** | |
545 | * gfs2_ea_get_i - | |
546 | * @ip: | |
547 | * @er: | |
548 | * | |
549 | * Returns: actual size of data on success, -errno on error | |
550 | */ | |
551 | ||
552 | int gfs2_ea_get_i(struct gfs2_inode *ip, struct gfs2_ea_request *er) | |
553 | { | |
554 | struct gfs2_ea_location el; | |
555 | int error; | |
556 | ||
557 | if (!ip->i_di.di_eattr) | |
558 | return -ENODATA; | |
559 | ||
560 | error = gfs2_ea_find(ip, er, &el); | |
561 | if (error) | |
562 | return error; | |
563 | if (!el.el_ea) | |
564 | return -ENODATA; | |
565 | ||
566 | if (er->er_data_len) { | |
567 | if (GFS2_EA_DATA_LEN(el.el_ea) > er->er_data_len) | |
568 | error = -ERANGE; | |
569 | else | |
570 | error = gfs2_ea_get_copy(ip, &el, er->er_data); | |
571 | } | |
572 | if (!error) | |
573 | error = GFS2_EA_DATA_LEN(el.el_ea); | |
574 | ||
575 | brelse(el.el_bh); | |
576 | ||
577 | return error; | |
578 | } | |
579 | ||
580 | /** | |
581 | * gfs2_ea_get - | |
582 | * @ip: | |
583 | * @er: | |
584 | * | |
585 | * Returns: actual size of data on success, -errno on error | |
586 | */ | |
587 | ||
588 | int gfs2_ea_get(struct gfs2_inode *ip, struct gfs2_ea_request *er) | |
589 | { | |
590 | struct gfs2_holder i_gh; | |
591 | int error; | |
592 | ||
593 | if (!er->er_name_len || | |
594 | er->er_name_len > GFS2_EA_MAX_NAME_LEN) | |
595 | return -EINVAL; | |
596 | if (!er->er_data || !er->er_data_len) { | |
597 | er->er_data = NULL; | |
598 | er->er_data_len = 0; | |
599 | } | |
600 | ||
601 | error = gfs2_glock_nq_init(ip->i_gl, | |
602 | LM_ST_SHARED, LM_FLAG_ANY, | |
603 | &i_gh); | |
604 | if (error) | |
605 | return error; | |
606 | ||
607 | error = gfs2_ea_ops[er->er_type]->eo_get(ip, er); | |
608 | ||
609 | gfs2_glock_dq_uninit(&i_gh); | |
610 | ||
611 | return error; | |
612 | } | |
613 | ||
614 | /** | |
615 | * ea_alloc_blk - allocates a new block for extended attributes. | |
616 | * @ip: A pointer to the inode that's getting extended attributes | |
617 | * @bhp: | |
618 | * | |
619 | * Returns: errno | |
620 | */ | |
621 | ||
622 | static int ea_alloc_blk(struct gfs2_inode *ip, struct buffer_head **bhp) | |
623 | { | |
624 | struct gfs2_sbd *sdp = ip->i_sbd; | |
625 | struct gfs2_ea_header *ea; | |
626 | uint64_t block; | |
627 | ||
628 | block = gfs2_alloc_meta(ip); | |
629 | ||
630 | *bhp = gfs2_meta_new(ip->i_gl, block); | |
d4e9c4c3 | 631 | gfs2_trans_add_bh(ip->i_gl, *bhp, 1); |
b3b94faa DT |
632 | gfs2_metatype_set(*bhp, GFS2_METATYPE_EA, GFS2_FORMAT_EA); |
633 | gfs2_buffer_clear_tail(*bhp, sizeof(struct gfs2_meta_header)); | |
634 | ||
635 | ea = GFS2_EA_BH2FIRST(*bhp); | |
636 | ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize); | |
637 | ea->ea_type = GFS2_EATYPE_UNUSED; | |
638 | ea->ea_flags = GFS2_EAFLAG_LAST; | |
639 | ea->ea_num_ptrs = 0; | |
640 | ||
641 | ip->i_di.di_blocks++; | |
642 | ||
643 | return 0; | |
644 | } | |
645 | ||
646 | /** | |
647 | * ea_write - writes the request info to an ea, creating new blocks if | |
648 | * necessary | |
649 | * @ip: inode that is being modified | |
650 | * @ea: the location of the new ea in a block | |
651 | * @er: the write request | |
652 | * | |
653 | * Note: does not update ea_rec_len or the GFS2_EAFLAG_LAST bin of ea_flags | |
654 | * | |
655 | * returns : errno | |
656 | */ | |
657 | ||
658 | static int ea_write(struct gfs2_inode *ip, struct gfs2_ea_header *ea, | |
659 | struct gfs2_ea_request *er) | |
660 | { | |
661 | struct gfs2_sbd *sdp = ip->i_sbd; | |
662 | ||
663 | ea->ea_data_len = cpu_to_be32(er->er_data_len); | |
664 | ea->ea_name_len = er->er_name_len; | |
665 | ea->ea_type = er->er_type; | |
666 | ea->__pad = 0; | |
667 | ||
668 | memcpy(GFS2_EA2NAME(ea), er->er_name, er->er_name_len); | |
669 | ||
670 | if (GFS2_EAREQ_SIZE_STUFFED(er) <= sdp->sd_jbsize) { | |
671 | ea->ea_num_ptrs = 0; | |
672 | memcpy(GFS2_EA2DATA(ea), er->er_data, er->er_data_len); | |
673 | } else { | |
674 | uint64_t *dataptr = GFS2_EA2DATAPTRS(ea); | |
675 | const char *data = er->er_data; | |
676 | unsigned int data_len = er->er_data_len; | |
677 | unsigned int copy; | |
678 | unsigned int x; | |
679 | ||
680 | ea->ea_num_ptrs = DIV_RU(er->er_data_len, sdp->sd_jbsize); | |
681 | for (x = 0; x < ea->ea_num_ptrs; x++) { | |
682 | struct buffer_head *bh; | |
683 | uint64_t block; | |
684 | int mh_size = sizeof(struct gfs2_meta_header); | |
685 | ||
686 | block = gfs2_alloc_meta(ip); | |
687 | ||
688 | bh = gfs2_meta_new(ip->i_gl, block); | |
d4e9c4c3 | 689 | gfs2_trans_add_bh(ip->i_gl, bh, 1); |
b3b94faa DT |
690 | gfs2_metatype_set(bh, GFS2_METATYPE_ED, GFS2_FORMAT_ED); |
691 | ||
692 | ip->i_di.di_blocks++; | |
693 | ||
694 | copy = (data_len > sdp->sd_jbsize) ? sdp->sd_jbsize : | |
695 | data_len; | |
696 | memcpy(bh->b_data + mh_size, data, copy); | |
697 | if (copy < sdp->sd_jbsize) | |
698 | memset(bh->b_data + mh_size + copy, 0, | |
699 | sdp->sd_jbsize - copy); | |
700 | ||
701 | *dataptr++ = cpu_to_be64((uint64_t)bh->b_blocknr); | |
702 | data += copy; | |
703 | data_len -= copy; | |
704 | ||
705 | brelse(bh); | |
706 | } | |
707 | ||
708 | gfs2_assert_withdraw(sdp, !data_len); | |
709 | } | |
710 | ||
711 | return 0; | |
712 | } | |
713 | ||
714 | typedef int (*ea_skeleton_call_t) (struct gfs2_inode *ip, | |
715 | struct gfs2_ea_request *er, | |
716 | void *private); | |
717 | ||
718 | static int ea_alloc_skeleton(struct gfs2_inode *ip, struct gfs2_ea_request *er, | |
719 | unsigned int blks, | |
720 | ea_skeleton_call_t skeleton_call, | |
721 | void *private) | |
722 | { | |
723 | struct gfs2_alloc *al; | |
724 | struct buffer_head *dibh; | |
725 | int error; | |
726 | ||
727 | al = gfs2_alloc_get(ip); | |
728 | ||
729 | error = gfs2_quota_lock(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE); | |
730 | if (error) | |
731 | goto out; | |
732 | ||
733 | error = gfs2_quota_check(ip, ip->i_di.di_uid, ip->i_di.di_gid); | |
734 | if (error) | |
735 | goto out_gunlock_q; | |
736 | ||
737 | al->al_requested = blks; | |
738 | ||
739 | error = gfs2_inplace_reserve(ip); | |
740 | if (error) | |
741 | goto out_gunlock_q; | |
742 | ||
743 | error = gfs2_trans_begin(ip->i_sbd, | |
744 | blks + al->al_rgd->rd_ri.ri_length + | |
745 | RES_DINODE + RES_STATFS + RES_QUOTA, 0); | |
746 | if (error) | |
747 | goto out_ipres; | |
748 | ||
749 | error = skeleton_call(ip, er, private); | |
750 | if (error) | |
751 | goto out_end_trans; | |
752 | ||
753 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
754 | if (!error) { | |
755 | if (er->er_flags & GFS2_ERF_MODE) { | |
756 | gfs2_assert_withdraw(ip->i_sbd, | |
757 | (ip->i_di.di_mode & S_IFMT) == | |
758 | (er->er_mode & S_IFMT)); | |
759 | ip->i_di.di_mode = er->er_mode; | |
760 | } | |
761 | ip->i_di.di_ctime = get_seconds(); | |
d4e9c4c3 | 762 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
b3b94faa DT |
763 | gfs2_dinode_out(&ip->i_di, dibh->b_data); |
764 | brelse(dibh); | |
765 | } | |
766 | ||
767 | out_end_trans: | |
768 | gfs2_trans_end(ip->i_sbd); | |
769 | ||
770 | out_ipres: | |
771 | gfs2_inplace_release(ip); | |
772 | ||
773 | out_gunlock_q: | |
774 | gfs2_quota_unlock(ip); | |
775 | ||
776 | out: | |
777 | gfs2_alloc_put(ip); | |
778 | ||
779 | return error; | |
780 | } | |
781 | ||
782 | static int ea_init_i(struct gfs2_inode *ip, struct gfs2_ea_request *er, | |
783 | void *private) | |
784 | { | |
785 | struct buffer_head *bh; | |
786 | int error; | |
787 | ||
788 | error = ea_alloc_blk(ip, &bh); | |
789 | if (error) | |
790 | return error; | |
791 | ||
792 | ip->i_di.di_eattr = bh->b_blocknr; | |
793 | error = ea_write(ip, GFS2_EA_BH2FIRST(bh), er); | |
794 | ||
795 | brelse(bh); | |
796 | ||
797 | return error; | |
798 | } | |
799 | ||
800 | /** | |
801 | * ea_init - initializes a new eattr block | |
802 | * @ip: | |
803 | * @er: | |
804 | * | |
805 | * Returns: errno | |
806 | */ | |
807 | ||
808 | static int ea_init(struct gfs2_inode *ip, struct gfs2_ea_request *er) | |
809 | { | |
810 | unsigned int jbsize = ip->i_sbd->sd_jbsize; | |
811 | unsigned int blks = 1; | |
812 | ||
813 | if (GFS2_EAREQ_SIZE_STUFFED(er) > jbsize) | |
814 | blks += DIV_RU(er->er_data_len, jbsize); | |
815 | ||
816 | return ea_alloc_skeleton(ip, er, blks, ea_init_i, NULL); | |
817 | } | |
818 | ||
819 | static struct gfs2_ea_header *ea_split_ea(struct gfs2_ea_header *ea) | |
820 | { | |
821 | uint32_t ea_size = GFS2_EA_SIZE(ea); | |
822 | struct gfs2_ea_header *new = (struct gfs2_ea_header *)((char *)ea + ea_size); | |
823 | uint32_t new_size = GFS2_EA_REC_LEN(ea) - ea_size; | |
824 | int last = ea->ea_flags & GFS2_EAFLAG_LAST; | |
825 | ||
826 | ea->ea_rec_len = cpu_to_be32(ea_size); | |
827 | ea->ea_flags ^= last; | |
828 | ||
829 | new->ea_rec_len = cpu_to_be32(new_size); | |
830 | new->ea_flags = last; | |
831 | ||
832 | return new; | |
833 | } | |
834 | ||
835 | static void ea_set_remove_stuffed(struct gfs2_inode *ip, | |
836 | struct gfs2_ea_location *el) | |
837 | { | |
838 | struct gfs2_ea_header *ea = el->el_ea; | |
839 | struct gfs2_ea_header *prev = el->el_prev; | |
840 | uint32_t len; | |
841 | ||
d4e9c4c3 | 842 | gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1); |
b3b94faa DT |
843 | |
844 | if (!prev || !GFS2_EA_IS_STUFFED(ea)) { | |
845 | ea->ea_type = GFS2_EATYPE_UNUSED; | |
846 | return; | |
847 | } else if (GFS2_EA2NEXT(prev) != ea) { | |
848 | prev = GFS2_EA2NEXT(prev); | |
849 | gfs2_assert_withdraw(ip->i_sbd, GFS2_EA2NEXT(prev) == ea); | |
850 | } | |
851 | ||
852 | len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea); | |
853 | prev->ea_rec_len = cpu_to_be32(len); | |
854 | ||
855 | if (GFS2_EA_IS_LAST(ea)) | |
856 | prev->ea_flags |= GFS2_EAFLAG_LAST; | |
857 | } | |
858 | ||
859 | struct ea_set { | |
860 | int ea_split; | |
861 | ||
862 | struct gfs2_ea_request *es_er; | |
863 | struct gfs2_ea_location *es_el; | |
864 | ||
865 | struct buffer_head *es_bh; | |
866 | struct gfs2_ea_header *es_ea; | |
867 | }; | |
868 | ||
869 | static int ea_set_simple_noalloc(struct gfs2_inode *ip, struct buffer_head *bh, | |
870 | struct gfs2_ea_header *ea, struct ea_set *es) | |
871 | { | |
872 | struct gfs2_ea_request *er = es->es_er; | |
873 | struct buffer_head *dibh; | |
874 | int error; | |
875 | ||
876 | error = gfs2_trans_begin(ip->i_sbd, RES_DINODE + 2 * RES_EATTR, 0); | |
877 | if (error) | |
878 | return error; | |
879 | ||
d4e9c4c3 | 880 | gfs2_trans_add_bh(ip->i_gl, bh, 1); |
b3b94faa DT |
881 | |
882 | if (es->ea_split) | |
883 | ea = ea_split_ea(ea); | |
884 | ||
885 | ea_write(ip, ea, er); | |
886 | ||
887 | if (es->es_el) | |
888 | ea_set_remove_stuffed(ip, es->es_el); | |
889 | ||
890 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
891 | if (error) | |
892 | goto out; | |
893 | ||
894 | if (er->er_flags & GFS2_ERF_MODE) { | |
895 | gfs2_assert_withdraw(ip->i_sbd, | |
896 | (ip->i_di.di_mode & S_IFMT) == (er->er_mode & S_IFMT)); | |
897 | ip->i_di.di_mode = er->er_mode; | |
898 | } | |
899 | ip->i_di.di_ctime = get_seconds(); | |
d4e9c4c3 | 900 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
b3b94faa DT |
901 | gfs2_dinode_out(&ip->i_di, dibh->b_data); |
902 | brelse(dibh); | |
903 | out: | |
904 | gfs2_trans_end(ip->i_sbd); | |
905 | ||
906 | return error; | |
907 | } | |
908 | ||
909 | static int ea_set_simple_alloc(struct gfs2_inode *ip, | |
910 | struct gfs2_ea_request *er, void *private) | |
911 | { | |
912 | struct ea_set *es = private; | |
913 | struct gfs2_ea_header *ea = es->es_ea; | |
914 | int error; | |
915 | ||
d4e9c4c3 | 916 | gfs2_trans_add_bh(ip->i_gl, es->es_bh, 1); |
b3b94faa DT |
917 | |
918 | if (es->ea_split) | |
919 | ea = ea_split_ea(ea); | |
920 | ||
921 | error = ea_write(ip, ea, er); | |
922 | if (error) | |
923 | return error; | |
924 | ||
925 | if (es->es_el) | |
926 | ea_set_remove_stuffed(ip, es->es_el); | |
927 | ||
928 | return 0; | |
929 | } | |
930 | ||
931 | static int ea_set_simple(struct gfs2_inode *ip, struct buffer_head *bh, | |
932 | struct gfs2_ea_header *ea, struct gfs2_ea_header *prev, | |
933 | void *private) | |
934 | { | |
935 | struct ea_set *es = private; | |
936 | unsigned int size; | |
937 | int stuffed; | |
938 | int error; | |
939 | ||
940 | stuffed = ea_calc_size(ip->i_sbd, es->es_er, &size); | |
941 | ||
942 | if (ea->ea_type == GFS2_EATYPE_UNUSED) { | |
943 | if (GFS2_EA_REC_LEN(ea) < size) | |
944 | return 0; | |
945 | if (!GFS2_EA_IS_STUFFED(ea)) { | |
946 | error = ea_remove_unstuffed(ip, bh, ea, prev, 1); | |
947 | if (error) | |
948 | return error; | |
949 | } | |
950 | es->ea_split = 0; | |
951 | } else if (GFS2_EA_REC_LEN(ea) - GFS2_EA_SIZE(ea) >= size) | |
952 | es->ea_split = 1; | |
953 | else | |
954 | return 0; | |
955 | ||
956 | if (stuffed) { | |
957 | error = ea_set_simple_noalloc(ip, bh, ea, es); | |
958 | if (error) | |
959 | return error; | |
960 | } else { | |
961 | unsigned int blks; | |
962 | ||
963 | es->es_bh = bh; | |
964 | es->es_ea = ea; | |
965 | blks = 2 + DIV_RU(es->es_er->er_data_len, ip->i_sbd->sd_jbsize); | |
966 | ||
967 | error = ea_alloc_skeleton(ip, es->es_er, blks, | |
968 | ea_set_simple_alloc, es); | |
969 | if (error) | |
970 | return error; | |
971 | } | |
972 | ||
973 | return 1; | |
974 | } | |
975 | ||
976 | static int ea_set_block(struct gfs2_inode *ip, struct gfs2_ea_request *er, | |
977 | void *private) | |
978 | { | |
979 | struct gfs2_sbd *sdp = ip->i_sbd; | |
980 | struct buffer_head *indbh, *newbh; | |
981 | uint64_t *eablk; | |
982 | int error; | |
983 | int mh_size = sizeof(struct gfs2_meta_header); | |
984 | ||
985 | if (ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT) { | |
986 | uint64_t *end; | |
987 | ||
988 | error = gfs2_meta_read(ip->i_gl, ip->i_di.di_eattr, | |
989 | DIO_START | DIO_WAIT, &indbh); | |
990 | if (error) | |
991 | return error; | |
992 | ||
993 | if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) { | |
994 | error = -EIO; | |
995 | goto out; | |
996 | } | |
997 | ||
998 | eablk = (uint64_t *)(indbh->b_data + mh_size); | |
999 | end = eablk + sdp->sd_inptrs; | |
1000 | ||
1001 | for (; eablk < end; eablk++) | |
1002 | if (!*eablk) | |
1003 | break; | |
1004 | ||
1005 | if (eablk == end) { | |
1006 | error = -ENOSPC; | |
1007 | goto out; | |
1008 | } | |
1009 | ||
d4e9c4c3 | 1010 | gfs2_trans_add_bh(ip->i_gl, indbh, 1); |
b3b94faa DT |
1011 | } else { |
1012 | uint64_t blk; | |
1013 | ||
1014 | blk = gfs2_alloc_meta(ip); | |
1015 | ||
1016 | indbh = gfs2_meta_new(ip->i_gl, blk); | |
d4e9c4c3 | 1017 | gfs2_trans_add_bh(ip->i_gl, indbh, 1); |
b3b94faa DT |
1018 | gfs2_metatype_set(indbh, GFS2_METATYPE_IN, GFS2_FORMAT_IN); |
1019 | gfs2_buffer_clear_tail(indbh, mh_size); | |
1020 | ||
1021 | eablk = (uint64_t *)(indbh->b_data + mh_size); | |
1022 | *eablk = cpu_to_be64(ip->i_di.di_eattr); | |
1023 | ip->i_di.di_eattr = blk; | |
1024 | ip->i_di.di_flags |= GFS2_DIF_EA_INDIRECT; | |
1025 | ip->i_di.di_blocks++; | |
1026 | ||
1027 | eablk++; | |
1028 | } | |
1029 | ||
1030 | error = ea_alloc_blk(ip, &newbh); | |
1031 | if (error) | |
1032 | goto out; | |
1033 | ||
1034 | *eablk = cpu_to_be64((uint64_t)newbh->b_blocknr); | |
1035 | error = ea_write(ip, GFS2_EA_BH2FIRST(newbh), er); | |
1036 | brelse(newbh); | |
1037 | if (error) | |
1038 | goto out; | |
1039 | ||
1040 | if (private) | |
1041 | ea_set_remove_stuffed(ip, (struct gfs2_ea_location *)private); | |
1042 | ||
1043 | out: | |
1044 | brelse(indbh); | |
1045 | ||
1046 | return error; | |
1047 | } | |
1048 | ||
1049 | static int ea_set_i(struct gfs2_inode *ip, struct gfs2_ea_request *er, | |
1050 | struct gfs2_ea_location *el) | |
1051 | { | |
1052 | struct ea_set es; | |
1053 | unsigned int blks = 2; | |
1054 | int error; | |
1055 | ||
1056 | memset(&es, 0, sizeof(struct ea_set)); | |
1057 | es.es_er = er; | |
1058 | es.es_el = el; | |
1059 | ||
1060 | error = ea_foreach(ip, ea_set_simple, &es); | |
1061 | if (error > 0) | |
1062 | return 0; | |
1063 | if (error) | |
1064 | return error; | |
1065 | ||
1066 | if (!(ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT)) | |
1067 | blks++; | |
1068 | if (GFS2_EAREQ_SIZE_STUFFED(er) > ip->i_sbd->sd_jbsize) | |
1069 | blks += DIV_RU(er->er_data_len, ip->i_sbd->sd_jbsize); | |
1070 | ||
1071 | return ea_alloc_skeleton(ip, er, blks, ea_set_block, el); | |
1072 | } | |
1073 | ||
1074 | static int ea_set_remove_unstuffed(struct gfs2_inode *ip, | |
1075 | struct gfs2_ea_location *el) | |
1076 | { | |
1077 | if (el->el_prev && GFS2_EA2NEXT(el->el_prev) != el->el_ea) { | |
1078 | el->el_prev = GFS2_EA2NEXT(el->el_prev); | |
1079 | gfs2_assert_withdraw(ip->i_sbd, | |
1080 | GFS2_EA2NEXT(el->el_prev) == el->el_ea); | |
1081 | } | |
1082 | ||
1083 | return ea_remove_unstuffed(ip, el->el_bh, el->el_ea, el->el_prev,0); | |
1084 | } | |
1085 | ||
1086 | int gfs2_ea_set_i(struct gfs2_inode *ip, struct gfs2_ea_request *er) | |
1087 | { | |
1088 | struct gfs2_ea_location el; | |
1089 | int error; | |
1090 | ||
1091 | if (!ip->i_di.di_eattr) { | |
1092 | if (er->er_flags & XATTR_REPLACE) | |
1093 | return -ENODATA; | |
1094 | return ea_init(ip, er); | |
1095 | } | |
1096 | ||
1097 | error = gfs2_ea_find(ip, er, &el); | |
1098 | if (error) | |
1099 | return error; | |
1100 | ||
1101 | if (el.el_ea) { | |
1102 | if (ip->i_di.di_flags & GFS2_DIF_APPENDONLY) { | |
1103 | brelse(el.el_bh); | |
1104 | return -EPERM; | |
1105 | } | |
1106 | ||
1107 | error = -EEXIST; | |
1108 | if (!(er->er_flags & XATTR_CREATE)) { | |
1109 | int unstuffed = !GFS2_EA_IS_STUFFED(el.el_ea); | |
1110 | error = ea_set_i(ip, er, &el); | |
1111 | if (!error && unstuffed) | |
1112 | ea_set_remove_unstuffed(ip, &el); | |
1113 | } | |
1114 | ||
1115 | brelse(el.el_bh); | |
1116 | } else { | |
1117 | error = -ENODATA; | |
1118 | if (!(er->er_flags & XATTR_REPLACE)) | |
1119 | error = ea_set_i(ip, er, NULL); | |
1120 | } | |
1121 | ||
1122 | return error; | |
1123 | } | |
1124 | ||
1125 | int gfs2_ea_set(struct gfs2_inode *ip, struct gfs2_ea_request *er) | |
1126 | { | |
1127 | struct gfs2_holder i_gh; | |
1128 | int error; | |
1129 | ||
1130 | if (!er->er_name_len || | |
1131 | er->er_name_len > GFS2_EA_MAX_NAME_LEN) | |
1132 | return -EINVAL; | |
1133 | if (!er->er_data || !er->er_data_len) { | |
1134 | er->er_data = NULL; | |
1135 | er->er_data_len = 0; | |
1136 | } | |
1137 | error = ea_check_size(ip->i_sbd, er); | |
1138 | if (error) | |
1139 | return error; | |
1140 | ||
1141 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); | |
1142 | if (error) | |
1143 | return error; | |
1144 | ||
1145 | if (IS_IMMUTABLE(ip->i_vnode)) | |
1146 | error = -EPERM; | |
1147 | else | |
1148 | error = gfs2_ea_ops[er->er_type]->eo_set(ip, er); | |
1149 | ||
1150 | gfs2_glock_dq_uninit(&i_gh); | |
1151 | ||
1152 | return error; | |
1153 | } | |
1154 | ||
1155 | static int ea_remove_stuffed(struct gfs2_inode *ip, struct gfs2_ea_location *el) | |
1156 | { | |
1157 | struct gfs2_ea_header *ea = el->el_ea; | |
1158 | struct gfs2_ea_header *prev = el->el_prev; | |
1159 | struct buffer_head *dibh; | |
1160 | int error; | |
1161 | ||
1162 | error = gfs2_trans_begin(ip->i_sbd, RES_DINODE + RES_EATTR, 0); | |
1163 | if (error) | |
1164 | return error; | |
1165 | ||
d4e9c4c3 | 1166 | gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1); |
b3b94faa DT |
1167 | |
1168 | if (prev) { | |
1169 | uint32_t len; | |
1170 | ||
1171 | len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea); | |
1172 | prev->ea_rec_len = cpu_to_be32(len); | |
1173 | ||
1174 | if (GFS2_EA_IS_LAST(ea)) | |
1175 | prev->ea_flags |= GFS2_EAFLAG_LAST; | |
1176 | } else | |
1177 | ea->ea_type = GFS2_EATYPE_UNUSED; | |
1178 | ||
1179 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1180 | if (!error) { | |
1181 | ip->i_di.di_ctime = get_seconds(); | |
d4e9c4c3 | 1182 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
b3b94faa DT |
1183 | gfs2_dinode_out(&ip->i_di, dibh->b_data); |
1184 | brelse(dibh); | |
1185 | } | |
1186 | ||
1187 | gfs2_trans_end(ip->i_sbd); | |
1188 | ||
1189 | return error; | |
1190 | } | |
1191 | ||
1192 | int gfs2_ea_remove_i(struct gfs2_inode *ip, struct gfs2_ea_request *er) | |
1193 | { | |
1194 | struct gfs2_ea_location el; | |
1195 | int error; | |
1196 | ||
1197 | if (!ip->i_di.di_eattr) | |
1198 | return -ENODATA; | |
1199 | ||
1200 | error = gfs2_ea_find(ip, er, &el); | |
1201 | if (error) | |
1202 | return error; | |
1203 | if (!el.el_ea) | |
1204 | return -ENODATA; | |
1205 | ||
1206 | if (GFS2_EA_IS_STUFFED(el.el_ea)) | |
1207 | error = ea_remove_stuffed(ip, &el); | |
1208 | else | |
1209 | error = ea_remove_unstuffed(ip, el.el_bh, el.el_ea, el.el_prev, | |
1210 | 0); | |
1211 | ||
1212 | brelse(el.el_bh); | |
1213 | ||
1214 | return error; | |
1215 | } | |
1216 | ||
1217 | /** | |
1218 | * gfs2_ea_remove - sets (or creates or replaces) an extended attribute | |
1219 | * @ip: pointer to the inode of the target file | |
1220 | * @er: request information | |
1221 | * | |
1222 | * Returns: errno | |
1223 | */ | |
1224 | ||
1225 | int gfs2_ea_remove(struct gfs2_inode *ip, struct gfs2_ea_request *er) | |
1226 | { | |
1227 | struct gfs2_holder i_gh; | |
1228 | int error; | |
1229 | ||
1230 | if (!er->er_name_len || er->er_name_len > GFS2_EA_MAX_NAME_LEN) | |
1231 | return -EINVAL; | |
1232 | ||
1233 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); | |
1234 | if (error) | |
1235 | return error; | |
1236 | ||
1237 | if (IS_IMMUTABLE(ip->i_vnode) || IS_APPEND(ip->i_vnode)) | |
1238 | error = -EPERM; | |
1239 | else | |
1240 | error = gfs2_ea_ops[er->er_type]->eo_remove(ip, er); | |
1241 | ||
1242 | gfs2_glock_dq_uninit(&i_gh); | |
1243 | ||
1244 | return error; | |
1245 | } | |
1246 | ||
1247 | static int ea_acl_chmod_unstuffed(struct gfs2_inode *ip, | |
1248 | struct gfs2_ea_header *ea, char *data) | |
1249 | { | |
1250 | struct gfs2_sbd *sdp = ip->i_sbd; | |
1251 | struct buffer_head **bh; | |
1252 | unsigned int amount = GFS2_EA_DATA_LEN(ea); | |
1253 | unsigned int nptrs = DIV_RU(amount, sdp->sd_jbsize); | |
1254 | uint64_t *dataptrs = GFS2_EA2DATAPTRS(ea); | |
1255 | unsigned int x; | |
1256 | int error; | |
1257 | ||
1258 | bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_KERNEL); | |
1259 | if (!bh) | |
1260 | return -ENOMEM; | |
1261 | ||
1262 | error = gfs2_trans_begin(sdp, nptrs + RES_DINODE, 0); | |
1263 | if (error) | |
1264 | goto out; | |
1265 | ||
1266 | for (x = 0; x < nptrs; x++) { | |
1267 | error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs), | |
1268 | DIO_START, bh + x); | |
1269 | if (error) { | |
1270 | while (x--) | |
1271 | brelse(bh[x]); | |
1272 | goto fail; | |
1273 | } | |
1274 | dataptrs++; | |
1275 | } | |
1276 | ||
1277 | for (x = 0; x < nptrs; x++) { | |
1278 | error = gfs2_meta_reread(sdp, bh[x], DIO_WAIT); | |
1279 | if (error) { | |
1280 | for (; x < nptrs; x++) | |
1281 | brelse(bh[x]); | |
1282 | goto fail; | |
1283 | } | |
1284 | if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) { | |
1285 | for (; x < nptrs; x++) | |
1286 | brelse(bh[x]); | |
1287 | error = -EIO; | |
1288 | goto fail; | |
1289 | } | |
1290 | ||
d4e9c4c3 | 1291 | gfs2_trans_add_bh(ip->i_gl, bh[x], 1); |
b3b94faa DT |
1292 | |
1293 | memcpy(bh[x]->b_data + sizeof(struct gfs2_meta_header), | |
1294 | data, | |
1295 | (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize); | |
1296 | ||
1297 | amount -= sdp->sd_jbsize; | |
1298 | data += sdp->sd_jbsize; | |
1299 | ||
1300 | brelse(bh[x]); | |
1301 | } | |
1302 | ||
1303 | out: | |
1304 | kfree(bh); | |
1305 | ||
1306 | return error; | |
1307 | ||
1308 | fail: | |
1309 | gfs2_trans_end(sdp); | |
1310 | kfree(bh); | |
1311 | ||
1312 | return error; | |
1313 | } | |
1314 | ||
1315 | int gfs2_ea_acl_chmod(struct gfs2_inode *ip, struct gfs2_ea_location *el, | |
1316 | struct iattr *attr, char *data) | |
1317 | { | |
1318 | struct buffer_head *dibh; | |
1319 | int error; | |
1320 | ||
1321 | if (GFS2_EA_IS_STUFFED(el->el_ea)) { | |
1322 | error = gfs2_trans_begin(ip->i_sbd, RES_DINODE + RES_EATTR, 0); | |
1323 | if (error) | |
1324 | return error; | |
1325 | ||
d4e9c4c3 | 1326 | gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1); |
b3b94faa DT |
1327 | memcpy(GFS2_EA2DATA(el->el_ea), |
1328 | data, | |
1329 | GFS2_EA_DATA_LEN(el->el_ea)); | |
1330 | } else | |
1331 | error = ea_acl_chmod_unstuffed(ip, el->el_ea, data); | |
1332 | ||
1333 | if (error) | |
1334 | return error; | |
1335 | ||
1336 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1337 | if (!error) { | |
1338 | error = inode_setattr(ip->i_vnode, attr); | |
1339 | gfs2_assert_warn(ip->i_sbd, !error); | |
1340 | gfs2_inode_attr_out(ip); | |
d4e9c4c3 | 1341 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
b3b94faa DT |
1342 | gfs2_dinode_out(&ip->i_di, dibh->b_data); |
1343 | brelse(dibh); | |
1344 | } | |
1345 | ||
1346 | gfs2_trans_end(ip->i_sbd); | |
1347 | ||
1348 | return error; | |
1349 | } | |
1350 | ||
1351 | static int ea_dealloc_indirect(struct gfs2_inode *ip) | |
1352 | { | |
1353 | struct gfs2_sbd *sdp = ip->i_sbd; | |
1354 | struct gfs2_rgrp_list rlist; | |
1355 | struct buffer_head *indbh, *dibh; | |
1356 | uint64_t *eablk, *end; | |
1357 | unsigned int rg_blocks = 0; | |
1358 | uint64_t bstart = 0; | |
1359 | unsigned int blen = 0; | |
1360 | unsigned int blks = 0; | |
1361 | unsigned int x; | |
1362 | int error; | |
1363 | ||
1364 | memset(&rlist, 0, sizeof(struct gfs2_rgrp_list)); | |
1365 | ||
1366 | error = gfs2_meta_read(ip->i_gl, ip->i_di.di_eattr, | |
1367 | DIO_START | DIO_WAIT, &indbh); | |
1368 | if (error) | |
1369 | return error; | |
1370 | ||
1371 | if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) { | |
1372 | error = -EIO; | |
1373 | goto out; | |
1374 | } | |
1375 | ||
1376 | eablk = (uint64_t *)(indbh->b_data + sizeof(struct gfs2_meta_header)); | |
1377 | end = eablk + sdp->sd_inptrs; | |
1378 | ||
1379 | for (; eablk < end; eablk++) { | |
1380 | uint64_t bn; | |
1381 | ||
1382 | if (!*eablk) | |
1383 | break; | |
1384 | bn = be64_to_cpu(*eablk); | |
1385 | ||
1386 | if (bstart + blen == bn) | |
1387 | blen++; | |
1388 | else { | |
1389 | if (bstart) | |
1390 | gfs2_rlist_add(sdp, &rlist, bstart); | |
1391 | bstart = bn; | |
1392 | blen = 1; | |
1393 | } | |
1394 | blks++; | |
1395 | } | |
1396 | if (bstart) | |
1397 | gfs2_rlist_add(sdp, &rlist, bstart); | |
1398 | else | |
1399 | goto out; | |
1400 | ||
1401 | gfs2_rlist_alloc(&rlist, LM_ST_EXCLUSIVE, 0); | |
1402 | ||
1403 | for (x = 0; x < rlist.rl_rgrps; x++) { | |
1404 | struct gfs2_rgrpd *rgd; | |
1405 | rgd = get_gl2rgd(rlist.rl_ghs[x].gh_gl); | |
1406 | rg_blocks += rgd->rd_ri.ri_length; | |
1407 | } | |
1408 | ||
1409 | error = gfs2_glock_nq_m(rlist.rl_rgrps, rlist.rl_ghs); | |
1410 | if (error) | |
1411 | goto out_rlist_free; | |
1412 | ||
1413 | error = gfs2_trans_begin(sdp, rg_blocks + RES_DINODE + | |
1414 | RES_INDIRECT + RES_STATFS + | |
1415 | RES_QUOTA, blks); | |
1416 | if (error) | |
1417 | goto out_gunlock; | |
1418 | ||
d4e9c4c3 | 1419 | gfs2_trans_add_bh(ip->i_gl, indbh, 1); |
b3b94faa DT |
1420 | |
1421 | eablk = (uint64_t *)(indbh->b_data + sizeof(struct gfs2_meta_header)); | |
1422 | bstart = 0; | |
1423 | blen = 0; | |
1424 | ||
1425 | for (; eablk < end; eablk++) { | |
1426 | uint64_t bn; | |
1427 | ||
1428 | if (!*eablk) | |
1429 | break; | |
1430 | bn = be64_to_cpu(*eablk); | |
1431 | ||
1432 | if (bstart + blen == bn) | |
1433 | blen++; | |
1434 | else { | |
1435 | if (bstart) | |
1436 | gfs2_free_meta(ip, bstart, blen); | |
1437 | bstart = bn; | |
1438 | blen = 1; | |
1439 | } | |
1440 | ||
1441 | *eablk = 0; | |
1442 | if (!ip->i_di.di_blocks) | |
1443 | gfs2_consist_inode(ip); | |
1444 | ip->i_di.di_blocks--; | |
1445 | } | |
1446 | if (bstart) | |
1447 | gfs2_free_meta(ip, bstart, blen); | |
1448 | ||
1449 | ip->i_di.di_flags &= ~GFS2_DIF_EA_INDIRECT; | |
1450 | ||
1451 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1452 | if (!error) { | |
d4e9c4c3 | 1453 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
b3b94faa DT |
1454 | gfs2_dinode_out(&ip->i_di, dibh->b_data); |
1455 | brelse(dibh); | |
1456 | } | |
1457 | ||
1458 | gfs2_trans_end(sdp); | |
1459 | ||
1460 | out_gunlock: | |
1461 | gfs2_glock_dq_m(rlist.rl_rgrps, rlist.rl_ghs); | |
1462 | ||
1463 | out_rlist_free: | |
1464 | gfs2_rlist_free(&rlist); | |
1465 | ||
1466 | out: | |
1467 | brelse(indbh); | |
1468 | ||
1469 | return error; | |
1470 | } | |
1471 | ||
1472 | static int ea_dealloc_block(struct gfs2_inode *ip) | |
1473 | { | |
1474 | struct gfs2_sbd *sdp = ip->i_sbd; | |
1475 | struct gfs2_alloc *al = &ip->i_alloc; | |
1476 | struct gfs2_rgrpd *rgd; | |
1477 | struct buffer_head *dibh; | |
1478 | int error; | |
1479 | ||
1480 | rgd = gfs2_blk2rgrpd(sdp, ip->i_di.di_eattr); | |
1481 | if (!rgd) { | |
1482 | gfs2_consist_inode(ip); | |
1483 | return -EIO; | |
1484 | } | |
1485 | ||
1486 | error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, | |
1487 | &al->al_rgd_gh); | |
1488 | if (error) | |
1489 | return error; | |
1490 | ||
1491 | error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_DINODE + | |
1492 | RES_STATFS + RES_QUOTA, 1); | |
1493 | if (error) | |
1494 | goto out_gunlock; | |
1495 | ||
1496 | gfs2_free_meta(ip, ip->i_di.di_eattr, 1); | |
1497 | ||
1498 | ip->i_di.di_eattr = 0; | |
1499 | if (!ip->i_di.di_blocks) | |
1500 | gfs2_consist_inode(ip); | |
1501 | ip->i_di.di_blocks--; | |
1502 | ||
1503 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1504 | if (!error) { | |
d4e9c4c3 | 1505 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
b3b94faa DT |
1506 | gfs2_dinode_out(&ip->i_di, dibh->b_data); |
1507 | brelse(dibh); | |
1508 | } | |
1509 | ||
1510 | gfs2_trans_end(sdp); | |
1511 | ||
1512 | out_gunlock: | |
1513 | gfs2_glock_dq_uninit(&al->al_rgd_gh); | |
1514 | ||
1515 | return error; | |
1516 | } | |
1517 | ||
1518 | /** | |
1519 | * gfs2_ea_dealloc - deallocate the extended attribute fork | |
1520 | * @ip: the inode | |
1521 | * | |
1522 | * Returns: errno | |
1523 | */ | |
1524 | ||
1525 | int gfs2_ea_dealloc(struct gfs2_inode *ip) | |
1526 | { | |
1527 | struct gfs2_alloc *al; | |
1528 | int error; | |
1529 | ||
1530 | al = gfs2_alloc_get(ip); | |
1531 | ||
1532 | error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE); | |
1533 | if (error) | |
1534 | goto out_alloc; | |
1535 | ||
1536 | error = gfs2_rindex_hold(ip->i_sbd, &al->al_ri_gh); | |
1537 | if (error) | |
1538 | goto out_quota; | |
1539 | ||
1540 | error = ea_foreach(ip, ea_dealloc_unstuffed, NULL); | |
1541 | if (error) | |
1542 | goto out_rindex; | |
1543 | ||
1544 | if (ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT) { | |
1545 | error = ea_dealloc_indirect(ip); | |
1546 | if (error) | |
1547 | goto out_rindex; | |
1548 | } | |
1549 | ||
1550 | error = ea_dealloc_block(ip); | |
1551 | ||
1552 | out_rindex: | |
1553 | gfs2_glock_dq_uninit(&al->al_ri_gh); | |
1554 | ||
1555 | out_quota: | |
1556 | gfs2_quota_unhold(ip); | |
1557 | ||
1558 | out_alloc: | |
1559 | gfs2_alloc_put(ip); | |
1560 | ||
1561 | return error; | |
1562 | } | |
1563 |