Commit | Line | Data |
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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; | |
639b6d79 | 371 | unsigned int ea_size = gfs2_ea_strlen(ea); |
b3b94faa DT |
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 | ||
639b6d79 RH |
384 | switch (ea->ea_type) { |
385 | case GFS2_EATYPE_USR: | |
b3b94faa DT |
386 | prefix = "user."; |
387 | l = 5; | |
639b6d79 RH |
388 | break; |
389 | case GFS2_EATYPE_SYS: | |
b3b94faa DT |
390 | prefix = "system."; |
391 | l = 7; | |
639b6d79 RH |
392 | break; |
393 | case GFS2_EATYPE_SECURITY: | |
394 | prefix = "security."; | |
395 | l = 9; | |
396 | break; | |
397 | default: | |
90cdd208 | 398 | /* FIXME: Needs looking at again */ |
639b6d79 | 399 | break; |
b3b94faa DT |
400 | } |
401 | ||
90cdd208 SW |
402 | memcpy(er->er_data + ei->ei_size, prefix, l); |
403 | memcpy(er->er_data + ei->ei_size + l, GFS2_EA2NAME(ea), | |
b3b94faa | 404 | ea->ea_name_len); |
90cdd208 | 405 | memcpy(er->er_data + ei->ei_size + ea_size - 1, &c, 1); |
b3b94faa DT |
406 | } |
407 | ||
408 | ei->ei_size += ea_size; | |
409 | ||
410 | return 0; | |
411 | } | |
412 | ||
413 | /** | |
414 | * gfs2_ea_list - | |
415 | * @ip: | |
416 | * @er: | |
417 | * | |
418 | * Returns: actual size of data on success, -errno on error | |
419 | */ | |
420 | ||
421 | int gfs2_ea_list(struct gfs2_inode *ip, struct gfs2_ea_request *er) | |
422 | { | |
423 | struct gfs2_holder i_gh; | |
424 | int error; | |
425 | ||
426 | if (!er->er_data || !er->er_data_len) { | |
427 | er->er_data = NULL; | |
428 | er->er_data_len = 0; | |
429 | } | |
430 | ||
431 | error = gfs2_glock_nq_init(ip->i_gl, | |
432 | LM_ST_SHARED, LM_FLAG_ANY, | |
433 | &i_gh); | |
434 | if (error) | |
435 | return error; | |
436 | ||
437 | if (ip->i_di.di_eattr) { | |
438 | struct ea_list ei = { .ei_er = er, .ei_size = 0 }; | |
439 | ||
440 | error = ea_foreach(ip, ea_list_i, &ei); | |
441 | if (!error) | |
442 | error = ei.ei_size; | |
443 | } | |
444 | ||
445 | gfs2_glock_dq_uninit(&i_gh); | |
446 | ||
447 | return error; | |
448 | } | |
449 | ||
450 | /** | |
451 | * ea_get_unstuffed - actually copies the unstuffed data into the | |
452 | * request buffer | |
453 | * @ip: | |
454 | * @ea: | |
455 | * @data: | |
456 | * | |
457 | * Returns: errno | |
458 | */ | |
459 | ||
460 | static int ea_get_unstuffed(struct gfs2_inode *ip, struct gfs2_ea_header *ea, | |
461 | char *data) | |
462 | { | |
463 | struct gfs2_sbd *sdp = ip->i_sbd; | |
464 | struct buffer_head **bh; | |
465 | unsigned int amount = GFS2_EA_DATA_LEN(ea); | |
5c676f6d | 466 | unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize); |
b3b94faa DT |
467 | uint64_t *dataptrs = GFS2_EA2DATAPTRS(ea); |
468 | unsigned int x; | |
469 | int error = 0; | |
470 | ||
471 | bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_KERNEL); | |
472 | if (!bh) | |
473 | return -ENOMEM; | |
474 | ||
475 | for (x = 0; x < nptrs; x++) { | |
476 | error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs), | |
477 | DIO_START, bh + x); | |
478 | if (error) { | |
479 | while (x--) | |
480 | brelse(bh[x]); | |
481 | goto out; | |
482 | } | |
483 | dataptrs++; | |
484 | } | |
485 | ||
486 | for (x = 0; x < nptrs; x++) { | |
487 | error = gfs2_meta_reread(sdp, bh[x], DIO_WAIT); | |
488 | if (error) { | |
489 | for (; x < nptrs; x++) | |
490 | brelse(bh[x]); | |
491 | goto out; | |
492 | } | |
493 | if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) { | |
494 | for (; x < nptrs; x++) | |
495 | brelse(bh[x]); | |
496 | error = -EIO; | |
497 | goto out; | |
498 | } | |
499 | ||
500 | memcpy(data, | |
501 | bh[x]->b_data + sizeof(struct gfs2_meta_header), | |
502 | (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize); | |
503 | ||
504 | amount -= sdp->sd_jbsize; | |
505 | data += sdp->sd_jbsize; | |
506 | ||
507 | brelse(bh[x]); | |
508 | } | |
509 | ||
510 | out: | |
511 | kfree(bh); | |
512 | ||
513 | return error; | |
514 | } | |
515 | ||
516 | int gfs2_ea_get_copy(struct gfs2_inode *ip, struct gfs2_ea_location *el, | |
517 | char *data) | |
518 | { | |
519 | if (GFS2_EA_IS_STUFFED(el->el_ea)) { | |
520 | memcpy(data, | |
521 | GFS2_EA2DATA(el->el_ea), | |
522 | GFS2_EA_DATA_LEN(el->el_ea)); | |
523 | return 0; | |
524 | } else | |
525 | return ea_get_unstuffed(ip, el->el_ea, data); | |
526 | } | |
527 | ||
528 | /** | |
529 | * gfs2_ea_get_i - | |
530 | * @ip: | |
531 | * @er: | |
532 | * | |
533 | * Returns: actual size of data on success, -errno on error | |
534 | */ | |
535 | ||
536 | int gfs2_ea_get_i(struct gfs2_inode *ip, struct gfs2_ea_request *er) | |
537 | { | |
538 | struct gfs2_ea_location el; | |
539 | int error; | |
540 | ||
541 | if (!ip->i_di.di_eattr) | |
542 | return -ENODATA; | |
543 | ||
544 | error = gfs2_ea_find(ip, er, &el); | |
545 | if (error) | |
546 | return error; | |
547 | if (!el.el_ea) | |
548 | return -ENODATA; | |
549 | ||
550 | if (er->er_data_len) { | |
551 | if (GFS2_EA_DATA_LEN(el.el_ea) > er->er_data_len) | |
552 | error = -ERANGE; | |
553 | else | |
554 | error = gfs2_ea_get_copy(ip, &el, er->er_data); | |
555 | } | |
556 | if (!error) | |
557 | error = GFS2_EA_DATA_LEN(el.el_ea); | |
558 | ||
559 | brelse(el.el_bh); | |
560 | ||
561 | return error; | |
562 | } | |
563 | ||
564 | /** | |
565 | * gfs2_ea_get - | |
566 | * @ip: | |
567 | * @er: | |
568 | * | |
569 | * Returns: actual size of data on success, -errno on error | |
570 | */ | |
571 | ||
572 | int gfs2_ea_get(struct gfs2_inode *ip, struct gfs2_ea_request *er) | |
573 | { | |
574 | struct gfs2_holder i_gh; | |
575 | int error; | |
576 | ||
577 | if (!er->er_name_len || | |
578 | er->er_name_len > GFS2_EA_MAX_NAME_LEN) | |
579 | return -EINVAL; | |
580 | if (!er->er_data || !er->er_data_len) { | |
581 | er->er_data = NULL; | |
582 | er->er_data_len = 0; | |
583 | } | |
584 | ||
585 | error = gfs2_glock_nq_init(ip->i_gl, | |
586 | LM_ST_SHARED, LM_FLAG_ANY, | |
587 | &i_gh); | |
588 | if (error) | |
589 | return error; | |
590 | ||
591 | error = gfs2_ea_ops[er->er_type]->eo_get(ip, er); | |
592 | ||
593 | gfs2_glock_dq_uninit(&i_gh); | |
594 | ||
595 | return error; | |
596 | } | |
597 | ||
598 | /** | |
599 | * ea_alloc_blk - allocates a new block for extended attributes. | |
600 | * @ip: A pointer to the inode that's getting extended attributes | |
601 | * @bhp: | |
602 | * | |
603 | * Returns: errno | |
604 | */ | |
605 | ||
606 | static int ea_alloc_blk(struct gfs2_inode *ip, struct buffer_head **bhp) | |
607 | { | |
608 | struct gfs2_sbd *sdp = ip->i_sbd; | |
609 | struct gfs2_ea_header *ea; | |
610 | uint64_t block; | |
611 | ||
612 | block = gfs2_alloc_meta(ip); | |
613 | ||
614 | *bhp = gfs2_meta_new(ip->i_gl, block); | |
d4e9c4c3 | 615 | gfs2_trans_add_bh(ip->i_gl, *bhp, 1); |
b3b94faa DT |
616 | gfs2_metatype_set(*bhp, GFS2_METATYPE_EA, GFS2_FORMAT_EA); |
617 | gfs2_buffer_clear_tail(*bhp, sizeof(struct gfs2_meta_header)); | |
618 | ||
619 | ea = GFS2_EA_BH2FIRST(*bhp); | |
620 | ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize); | |
621 | ea->ea_type = GFS2_EATYPE_UNUSED; | |
622 | ea->ea_flags = GFS2_EAFLAG_LAST; | |
623 | ea->ea_num_ptrs = 0; | |
624 | ||
625 | ip->i_di.di_blocks++; | |
626 | ||
627 | return 0; | |
628 | } | |
629 | ||
630 | /** | |
631 | * ea_write - writes the request info to an ea, creating new blocks if | |
632 | * necessary | |
633 | * @ip: inode that is being modified | |
634 | * @ea: the location of the new ea in a block | |
635 | * @er: the write request | |
636 | * | |
637 | * Note: does not update ea_rec_len or the GFS2_EAFLAG_LAST bin of ea_flags | |
638 | * | |
639 | * returns : errno | |
640 | */ | |
641 | ||
642 | static int ea_write(struct gfs2_inode *ip, struct gfs2_ea_header *ea, | |
643 | struct gfs2_ea_request *er) | |
644 | { | |
645 | struct gfs2_sbd *sdp = ip->i_sbd; | |
646 | ||
647 | ea->ea_data_len = cpu_to_be32(er->er_data_len); | |
648 | ea->ea_name_len = er->er_name_len; | |
649 | ea->ea_type = er->er_type; | |
650 | ea->__pad = 0; | |
651 | ||
652 | memcpy(GFS2_EA2NAME(ea), er->er_name, er->er_name_len); | |
653 | ||
654 | if (GFS2_EAREQ_SIZE_STUFFED(er) <= sdp->sd_jbsize) { | |
655 | ea->ea_num_ptrs = 0; | |
656 | memcpy(GFS2_EA2DATA(ea), er->er_data, er->er_data_len); | |
657 | } else { | |
658 | uint64_t *dataptr = GFS2_EA2DATAPTRS(ea); | |
659 | const char *data = er->er_data; | |
660 | unsigned int data_len = er->er_data_len; | |
661 | unsigned int copy; | |
662 | unsigned int x; | |
663 | ||
5c676f6d | 664 | ea->ea_num_ptrs = DIV_ROUND_UP(er->er_data_len, sdp->sd_jbsize); |
b3b94faa DT |
665 | for (x = 0; x < ea->ea_num_ptrs; x++) { |
666 | struct buffer_head *bh; | |
667 | uint64_t block; | |
668 | int mh_size = sizeof(struct gfs2_meta_header); | |
669 | ||
670 | block = gfs2_alloc_meta(ip); | |
671 | ||
672 | bh = gfs2_meta_new(ip->i_gl, block); | |
d4e9c4c3 | 673 | gfs2_trans_add_bh(ip->i_gl, bh, 1); |
b3b94faa DT |
674 | gfs2_metatype_set(bh, GFS2_METATYPE_ED, GFS2_FORMAT_ED); |
675 | ||
676 | ip->i_di.di_blocks++; | |
677 | ||
678 | copy = (data_len > sdp->sd_jbsize) ? sdp->sd_jbsize : | |
679 | data_len; | |
680 | memcpy(bh->b_data + mh_size, data, copy); | |
681 | if (copy < sdp->sd_jbsize) | |
682 | memset(bh->b_data + mh_size + copy, 0, | |
683 | sdp->sd_jbsize - copy); | |
684 | ||
685 | *dataptr++ = cpu_to_be64((uint64_t)bh->b_blocknr); | |
686 | data += copy; | |
687 | data_len -= copy; | |
688 | ||
689 | brelse(bh); | |
690 | } | |
691 | ||
692 | gfs2_assert_withdraw(sdp, !data_len); | |
693 | } | |
694 | ||
695 | return 0; | |
696 | } | |
697 | ||
698 | typedef int (*ea_skeleton_call_t) (struct gfs2_inode *ip, | |
699 | struct gfs2_ea_request *er, | |
700 | void *private); | |
701 | ||
702 | static int ea_alloc_skeleton(struct gfs2_inode *ip, struct gfs2_ea_request *er, | |
703 | unsigned int blks, | |
704 | ea_skeleton_call_t skeleton_call, | |
705 | void *private) | |
706 | { | |
707 | struct gfs2_alloc *al; | |
708 | struct buffer_head *dibh; | |
709 | int error; | |
710 | ||
711 | al = gfs2_alloc_get(ip); | |
712 | ||
713 | error = gfs2_quota_lock(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE); | |
714 | if (error) | |
715 | goto out; | |
716 | ||
717 | error = gfs2_quota_check(ip, ip->i_di.di_uid, ip->i_di.di_gid); | |
718 | if (error) | |
719 | goto out_gunlock_q; | |
720 | ||
721 | al->al_requested = blks; | |
722 | ||
723 | error = gfs2_inplace_reserve(ip); | |
724 | if (error) | |
725 | goto out_gunlock_q; | |
726 | ||
727 | error = gfs2_trans_begin(ip->i_sbd, | |
728 | blks + al->al_rgd->rd_ri.ri_length + | |
729 | RES_DINODE + RES_STATFS + RES_QUOTA, 0); | |
730 | if (error) | |
731 | goto out_ipres; | |
732 | ||
733 | error = skeleton_call(ip, er, private); | |
734 | if (error) | |
735 | goto out_end_trans; | |
736 | ||
737 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
738 | if (!error) { | |
739 | if (er->er_flags & GFS2_ERF_MODE) { | |
740 | gfs2_assert_withdraw(ip->i_sbd, | |
741 | (ip->i_di.di_mode & S_IFMT) == | |
742 | (er->er_mode & S_IFMT)); | |
743 | ip->i_di.di_mode = er->er_mode; | |
744 | } | |
745 | ip->i_di.di_ctime = get_seconds(); | |
d4e9c4c3 | 746 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
b3b94faa DT |
747 | gfs2_dinode_out(&ip->i_di, dibh->b_data); |
748 | brelse(dibh); | |
749 | } | |
750 | ||
751 | out_end_trans: | |
752 | gfs2_trans_end(ip->i_sbd); | |
753 | ||
754 | out_ipres: | |
755 | gfs2_inplace_release(ip); | |
756 | ||
757 | out_gunlock_q: | |
758 | gfs2_quota_unlock(ip); | |
759 | ||
760 | out: | |
761 | gfs2_alloc_put(ip); | |
762 | ||
763 | return error; | |
764 | } | |
765 | ||
766 | static int ea_init_i(struct gfs2_inode *ip, struct gfs2_ea_request *er, | |
767 | void *private) | |
768 | { | |
769 | struct buffer_head *bh; | |
770 | int error; | |
771 | ||
772 | error = ea_alloc_blk(ip, &bh); | |
773 | if (error) | |
774 | return error; | |
775 | ||
776 | ip->i_di.di_eattr = bh->b_blocknr; | |
777 | error = ea_write(ip, GFS2_EA_BH2FIRST(bh), er); | |
778 | ||
779 | brelse(bh); | |
780 | ||
781 | return error; | |
782 | } | |
783 | ||
784 | /** | |
785 | * ea_init - initializes a new eattr block | |
786 | * @ip: | |
787 | * @er: | |
788 | * | |
789 | * Returns: errno | |
790 | */ | |
791 | ||
792 | static int ea_init(struct gfs2_inode *ip, struct gfs2_ea_request *er) | |
793 | { | |
794 | unsigned int jbsize = ip->i_sbd->sd_jbsize; | |
795 | unsigned int blks = 1; | |
796 | ||
797 | if (GFS2_EAREQ_SIZE_STUFFED(er) > jbsize) | |
5c676f6d | 798 | blks += DIV_ROUND_UP(er->er_data_len, jbsize); |
b3b94faa DT |
799 | |
800 | return ea_alloc_skeleton(ip, er, blks, ea_init_i, NULL); | |
801 | } | |
802 | ||
803 | static struct gfs2_ea_header *ea_split_ea(struct gfs2_ea_header *ea) | |
804 | { | |
805 | uint32_t ea_size = GFS2_EA_SIZE(ea); | |
568f4c96 SW |
806 | struct gfs2_ea_header *new = (struct gfs2_ea_header *)((char *)ea + |
807 | ea_size); | |
b3b94faa DT |
808 | uint32_t new_size = GFS2_EA_REC_LEN(ea) - ea_size; |
809 | int last = ea->ea_flags & GFS2_EAFLAG_LAST; | |
810 | ||
811 | ea->ea_rec_len = cpu_to_be32(ea_size); | |
812 | ea->ea_flags ^= last; | |
813 | ||
814 | new->ea_rec_len = cpu_to_be32(new_size); | |
815 | new->ea_flags = last; | |
816 | ||
817 | return new; | |
818 | } | |
819 | ||
820 | static void ea_set_remove_stuffed(struct gfs2_inode *ip, | |
821 | struct gfs2_ea_location *el) | |
822 | { | |
823 | struct gfs2_ea_header *ea = el->el_ea; | |
824 | struct gfs2_ea_header *prev = el->el_prev; | |
825 | uint32_t len; | |
826 | ||
d4e9c4c3 | 827 | gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1); |
b3b94faa DT |
828 | |
829 | if (!prev || !GFS2_EA_IS_STUFFED(ea)) { | |
830 | ea->ea_type = GFS2_EATYPE_UNUSED; | |
831 | return; | |
832 | } else if (GFS2_EA2NEXT(prev) != ea) { | |
833 | prev = GFS2_EA2NEXT(prev); | |
834 | gfs2_assert_withdraw(ip->i_sbd, GFS2_EA2NEXT(prev) == ea); | |
835 | } | |
836 | ||
837 | len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea); | |
838 | prev->ea_rec_len = cpu_to_be32(len); | |
839 | ||
840 | if (GFS2_EA_IS_LAST(ea)) | |
841 | prev->ea_flags |= GFS2_EAFLAG_LAST; | |
842 | } | |
843 | ||
844 | struct ea_set { | |
845 | int ea_split; | |
846 | ||
847 | struct gfs2_ea_request *es_er; | |
848 | struct gfs2_ea_location *es_el; | |
849 | ||
850 | struct buffer_head *es_bh; | |
851 | struct gfs2_ea_header *es_ea; | |
852 | }; | |
853 | ||
854 | static int ea_set_simple_noalloc(struct gfs2_inode *ip, struct buffer_head *bh, | |
855 | struct gfs2_ea_header *ea, struct ea_set *es) | |
856 | { | |
857 | struct gfs2_ea_request *er = es->es_er; | |
858 | struct buffer_head *dibh; | |
859 | int error; | |
860 | ||
861 | error = gfs2_trans_begin(ip->i_sbd, RES_DINODE + 2 * RES_EATTR, 0); | |
862 | if (error) | |
863 | return error; | |
864 | ||
d4e9c4c3 | 865 | gfs2_trans_add_bh(ip->i_gl, bh, 1); |
b3b94faa DT |
866 | |
867 | if (es->ea_split) | |
868 | ea = ea_split_ea(ea); | |
869 | ||
870 | ea_write(ip, ea, er); | |
871 | ||
872 | if (es->es_el) | |
873 | ea_set_remove_stuffed(ip, es->es_el); | |
874 | ||
875 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
876 | if (error) | |
877 | goto out; | |
878 | ||
879 | if (er->er_flags & GFS2_ERF_MODE) { | |
880 | gfs2_assert_withdraw(ip->i_sbd, | |
881 | (ip->i_di.di_mode & S_IFMT) == (er->er_mode & S_IFMT)); | |
882 | ip->i_di.di_mode = er->er_mode; | |
883 | } | |
884 | ip->i_di.di_ctime = get_seconds(); | |
d4e9c4c3 | 885 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
b3b94faa DT |
886 | gfs2_dinode_out(&ip->i_di, dibh->b_data); |
887 | brelse(dibh); | |
888 | out: | |
889 | gfs2_trans_end(ip->i_sbd); | |
890 | ||
891 | return error; | |
892 | } | |
893 | ||
894 | static int ea_set_simple_alloc(struct gfs2_inode *ip, | |
895 | struct gfs2_ea_request *er, void *private) | |
896 | { | |
897 | struct ea_set *es = private; | |
898 | struct gfs2_ea_header *ea = es->es_ea; | |
899 | int error; | |
900 | ||
d4e9c4c3 | 901 | gfs2_trans_add_bh(ip->i_gl, es->es_bh, 1); |
b3b94faa DT |
902 | |
903 | if (es->ea_split) | |
904 | ea = ea_split_ea(ea); | |
905 | ||
906 | error = ea_write(ip, ea, er); | |
907 | if (error) | |
908 | return error; | |
909 | ||
910 | if (es->es_el) | |
911 | ea_set_remove_stuffed(ip, es->es_el); | |
912 | ||
913 | return 0; | |
914 | } | |
915 | ||
916 | static int ea_set_simple(struct gfs2_inode *ip, struct buffer_head *bh, | |
917 | struct gfs2_ea_header *ea, struct gfs2_ea_header *prev, | |
918 | void *private) | |
919 | { | |
920 | struct ea_set *es = private; | |
921 | unsigned int size; | |
922 | int stuffed; | |
923 | int error; | |
924 | ||
925 | stuffed = ea_calc_size(ip->i_sbd, es->es_er, &size); | |
926 | ||
927 | if (ea->ea_type == GFS2_EATYPE_UNUSED) { | |
928 | if (GFS2_EA_REC_LEN(ea) < size) | |
929 | return 0; | |
930 | if (!GFS2_EA_IS_STUFFED(ea)) { | |
931 | error = ea_remove_unstuffed(ip, bh, ea, prev, 1); | |
932 | if (error) | |
933 | return error; | |
934 | } | |
935 | es->ea_split = 0; | |
936 | } else if (GFS2_EA_REC_LEN(ea) - GFS2_EA_SIZE(ea) >= size) | |
937 | es->ea_split = 1; | |
938 | else | |
939 | return 0; | |
940 | ||
941 | if (stuffed) { | |
942 | error = ea_set_simple_noalloc(ip, bh, ea, es); | |
943 | if (error) | |
944 | return error; | |
945 | } else { | |
946 | unsigned int blks; | |
947 | ||
948 | es->es_bh = bh; | |
949 | es->es_ea = ea; | |
5c676f6d SW |
950 | blks = 2 + DIV_ROUND_UP(es->es_er->er_data_len, |
951 | ip->i_sbd->sd_jbsize); | |
b3b94faa DT |
952 | |
953 | error = ea_alloc_skeleton(ip, es->es_er, blks, | |
954 | ea_set_simple_alloc, es); | |
955 | if (error) | |
956 | return error; | |
957 | } | |
958 | ||
959 | return 1; | |
960 | } | |
961 | ||
962 | static int ea_set_block(struct gfs2_inode *ip, struct gfs2_ea_request *er, | |
963 | void *private) | |
964 | { | |
965 | struct gfs2_sbd *sdp = ip->i_sbd; | |
966 | struct buffer_head *indbh, *newbh; | |
967 | uint64_t *eablk; | |
968 | int error; | |
969 | int mh_size = sizeof(struct gfs2_meta_header); | |
970 | ||
971 | if (ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT) { | |
972 | uint64_t *end; | |
973 | ||
974 | error = gfs2_meta_read(ip->i_gl, ip->i_di.di_eattr, | |
975 | DIO_START | DIO_WAIT, &indbh); | |
976 | if (error) | |
977 | return error; | |
978 | ||
979 | if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) { | |
980 | error = -EIO; | |
981 | goto out; | |
982 | } | |
983 | ||
984 | eablk = (uint64_t *)(indbh->b_data + mh_size); | |
985 | end = eablk + sdp->sd_inptrs; | |
986 | ||
987 | for (; eablk < end; eablk++) | |
988 | if (!*eablk) | |
989 | break; | |
990 | ||
991 | if (eablk == end) { | |
992 | error = -ENOSPC; | |
993 | goto out; | |
994 | } | |
995 | ||
d4e9c4c3 | 996 | gfs2_trans_add_bh(ip->i_gl, indbh, 1); |
b3b94faa DT |
997 | } else { |
998 | uint64_t blk; | |
999 | ||
1000 | blk = gfs2_alloc_meta(ip); | |
1001 | ||
1002 | indbh = gfs2_meta_new(ip->i_gl, blk); | |
d4e9c4c3 | 1003 | gfs2_trans_add_bh(ip->i_gl, indbh, 1); |
b3b94faa DT |
1004 | gfs2_metatype_set(indbh, GFS2_METATYPE_IN, GFS2_FORMAT_IN); |
1005 | gfs2_buffer_clear_tail(indbh, mh_size); | |
1006 | ||
1007 | eablk = (uint64_t *)(indbh->b_data + mh_size); | |
1008 | *eablk = cpu_to_be64(ip->i_di.di_eattr); | |
1009 | ip->i_di.di_eattr = blk; | |
1010 | ip->i_di.di_flags |= GFS2_DIF_EA_INDIRECT; | |
1011 | ip->i_di.di_blocks++; | |
1012 | ||
1013 | eablk++; | |
1014 | } | |
1015 | ||
1016 | error = ea_alloc_blk(ip, &newbh); | |
1017 | if (error) | |
1018 | goto out; | |
1019 | ||
1020 | *eablk = cpu_to_be64((uint64_t)newbh->b_blocknr); | |
1021 | error = ea_write(ip, GFS2_EA_BH2FIRST(newbh), er); | |
1022 | brelse(newbh); | |
1023 | if (error) | |
1024 | goto out; | |
1025 | ||
1026 | if (private) | |
1027 | ea_set_remove_stuffed(ip, (struct gfs2_ea_location *)private); | |
1028 | ||
1029 | out: | |
1030 | brelse(indbh); | |
1031 | ||
1032 | return error; | |
1033 | } | |
1034 | ||
1035 | static int ea_set_i(struct gfs2_inode *ip, struct gfs2_ea_request *er, | |
1036 | struct gfs2_ea_location *el) | |
1037 | { | |
1038 | struct ea_set es; | |
1039 | unsigned int blks = 2; | |
1040 | int error; | |
1041 | ||
1042 | memset(&es, 0, sizeof(struct ea_set)); | |
1043 | es.es_er = er; | |
1044 | es.es_el = el; | |
1045 | ||
1046 | error = ea_foreach(ip, ea_set_simple, &es); | |
1047 | if (error > 0) | |
1048 | return 0; | |
1049 | if (error) | |
1050 | return error; | |
1051 | ||
1052 | if (!(ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT)) | |
1053 | blks++; | |
1054 | if (GFS2_EAREQ_SIZE_STUFFED(er) > ip->i_sbd->sd_jbsize) | |
5c676f6d | 1055 | blks += DIV_ROUND_UP(er->er_data_len, ip->i_sbd->sd_jbsize); |
b3b94faa DT |
1056 | |
1057 | return ea_alloc_skeleton(ip, er, blks, ea_set_block, el); | |
1058 | } | |
1059 | ||
1060 | static int ea_set_remove_unstuffed(struct gfs2_inode *ip, | |
1061 | struct gfs2_ea_location *el) | |
1062 | { | |
1063 | if (el->el_prev && GFS2_EA2NEXT(el->el_prev) != el->el_ea) { | |
1064 | el->el_prev = GFS2_EA2NEXT(el->el_prev); | |
1065 | gfs2_assert_withdraw(ip->i_sbd, | |
1066 | GFS2_EA2NEXT(el->el_prev) == el->el_ea); | |
1067 | } | |
1068 | ||
1069 | return ea_remove_unstuffed(ip, el->el_bh, el->el_ea, el->el_prev,0); | |
1070 | } | |
1071 | ||
1072 | int gfs2_ea_set_i(struct gfs2_inode *ip, struct gfs2_ea_request *er) | |
1073 | { | |
1074 | struct gfs2_ea_location el; | |
1075 | int error; | |
1076 | ||
1077 | if (!ip->i_di.di_eattr) { | |
1078 | if (er->er_flags & XATTR_REPLACE) | |
1079 | return -ENODATA; | |
1080 | return ea_init(ip, er); | |
1081 | } | |
1082 | ||
1083 | error = gfs2_ea_find(ip, er, &el); | |
1084 | if (error) | |
1085 | return error; | |
1086 | ||
1087 | if (el.el_ea) { | |
1088 | if (ip->i_di.di_flags & GFS2_DIF_APPENDONLY) { | |
1089 | brelse(el.el_bh); | |
1090 | return -EPERM; | |
1091 | } | |
1092 | ||
1093 | error = -EEXIST; | |
1094 | if (!(er->er_flags & XATTR_CREATE)) { | |
1095 | int unstuffed = !GFS2_EA_IS_STUFFED(el.el_ea); | |
1096 | error = ea_set_i(ip, er, &el); | |
1097 | if (!error && unstuffed) | |
1098 | ea_set_remove_unstuffed(ip, &el); | |
1099 | } | |
1100 | ||
1101 | brelse(el.el_bh); | |
1102 | } else { | |
1103 | error = -ENODATA; | |
1104 | if (!(er->er_flags & XATTR_REPLACE)) | |
1105 | error = ea_set_i(ip, er, NULL); | |
1106 | } | |
1107 | ||
1108 | return error; | |
1109 | } | |
1110 | ||
1111 | int gfs2_ea_set(struct gfs2_inode *ip, struct gfs2_ea_request *er) | |
1112 | { | |
1113 | struct gfs2_holder i_gh; | |
1114 | int error; | |
1115 | ||
1116 | if (!er->er_name_len || | |
1117 | er->er_name_len > GFS2_EA_MAX_NAME_LEN) | |
1118 | return -EINVAL; | |
1119 | if (!er->er_data || !er->er_data_len) { | |
1120 | er->er_data = NULL; | |
1121 | er->er_data_len = 0; | |
1122 | } | |
1123 | error = ea_check_size(ip->i_sbd, er); | |
1124 | if (error) | |
1125 | return error; | |
1126 | ||
1127 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); | |
1128 | if (error) | |
1129 | return error; | |
1130 | ||
1131 | if (IS_IMMUTABLE(ip->i_vnode)) | |
1132 | error = -EPERM; | |
1133 | else | |
1134 | error = gfs2_ea_ops[er->er_type]->eo_set(ip, er); | |
1135 | ||
1136 | gfs2_glock_dq_uninit(&i_gh); | |
1137 | ||
1138 | return error; | |
1139 | } | |
1140 | ||
1141 | static int ea_remove_stuffed(struct gfs2_inode *ip, struct gfs2_ea_location *el) | |
1142 | { | |
1143 | struct gfs2_ea_header *ea = el->el_ea; | |
1144 | struct gfs2_ea_header *prev = el->el_prev; | |
1145 | struct buffer_head *dibh; | |
1146 | int error; | |
1147 | ||
1148 | error = gfs2_trans_begin(ip->i_sbd, RES_DINODE + RES_EATTR, 0); | |
1149 | if (error) | |
1150 | return error; | |
1151 | ||
d4e9c4c3 | 1152 | gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1); |
b3b94faa DT |
1153 | |
1154 | if (prev) { | |
1155 | uint32_t len; | |
1156 | ||
1157 | len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea); | |
1158 | prev->ea_rec_len = cpu_to_be32(len); | |
1159 | ||
1160 | if (GFS2_EA_IS_LAST(ea)) | |
1161 | prev->ea_flags |= GFS2_EAFLAG_LAST; | |
1162 | } else | |
1163 | ea->ea_type = GFS2_EATYPE_UNUSED; | |
1164 | ||
1165 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1166 | if (!error) { | |
1167 | ip->i_di.di_ctime = get_seconds(); | |
d4e9c4c3 | 1168 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
b3b94faa DT |
1169 | gfs2_dinode_out(&ip->i_di, dibh->b_data); |
1170 | brelse(dibh); | |
1171 | } | |
1172 | ||
1173 | gfs2_trans_end(ip->i_sbd); | |
1174 | ||
1175 | return error; | |
1176 | } | |
1177 | ||
1178 | int gfs2_ea_remove_i(struct gfs2_inode *ip, struct gfs2_ea_request *er) | |
1179 | { | |
1180 | struct gfs2_ea_location el; | |
1181 | int error; | |
1182 | ||
1183 | if (!ip->i_di.di_eattr) | |
1184 | return -ENODATA; | |
1185 | ||
1186 | error = gfs2_ea_find(ip, er, &el); | |
1187 | if (error) | |
1188 | return error; | |
1189 | if (!el.el_ea) | |
1190 | return -ENODATA; | |
1191 | ||
1192 | if (GFS2_EA_IS_STUFFED(el.el_ea)) | |
1193 | error = ea_remove_stuffed(ip, &el); | |
1194 | else | |
1195 | error = ea_remove_unstuffed(ip, el.el_bh, el.el_ea, el.el_prev, | |
1196 | 0); | |
1197 | ||
1198 | brelse(el.el_bh); | |
1199 | ||
1200 | return error; | |
1201 | } | |
1202 | ||
1203 | /** | |
1204 | * gfs2_ea_remove - sets (or creates or replaces) an extended attribute | |
1205 | * @ip: pointer to the inode of the target file | |
1206 | * @er: request information | |
1207 | * | |
1208 | * Returns: errno | |
1209 | */ | |
1210 | ||
1211 | int gfs2_ea_remove(struct gfs2_inode *ip, struct gfs2_ea_request *er) | |
1212 | { | |
1213 | struct gfs2_holder i_gh; | |
1214 | int error; | |
1215 | ||
1216 | if (!er->er_name_len || er->er_name_len > GFS2_EA_MAX_NAME_LEN) | |
1217 | return -EINVAL; | |
1218 | ||
1219 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); | |
1220 | if (error) | |
1221 | return error; | |
1222 | ||
1223 | if (IS_IMMUTABLE(ip->i_vnode) || IS_APPEND(ip->i_vnode)) | |
1224 | error = -EPERM; | |
1225 | else | |
1226 | error = gfs2_ea_ops[er->er_type]->eo_remove(ip, er); | |
1227 | ||
1228 | gfs2_glock_dq_uninit(&i_gh); | |
1229 | ||
1230 | return error; | |
1231 | } | |
1232 | ||
1233 | static int ea_acl_chmod_unstuffed(struct gfs2_inode *ip, | |
1234 | struct gfs2_ea_header *ea, char *data) | |
1235 | { | |
1236 | struct gfs2_sbd *sdp = ip->i_sbd; | |
1237 | struct buffer_head **bh; | |
1238 | unsigned int amount = GFS2_EA_DATA_LEN(ea); | |
5c676f6d | 1239 | unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize); |
b3b94faa DT |
1240 | uint64_t *dataptrs = GFS2_EA2DATAPTRS(ea); |
1241 | unsigned int x; | |
1242 | int error; | |
1243 | ||
1244 | bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_KERNEL); | |
1245 | if (!bh) | |
1246 | return -ENOMEM; | |
1247 | ||
1248 | error = gfs2_trans_begin(sdp, nptrs + RES_DINODE, 0); | |
1249 | if (error) | |
1250 | goto out; | |
1251 | ||
1252 | for (x = 0; x < nptrs; x++) { | |
1253 | error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs), | |
1254 | DIO_START, bh + x); | |
1255 | if (error) { | |
1256 | while (x--) | |
1257 | brelse(bh[x]); | |
1258 | goto fail; | |
1259 | } | |
1260 | dataptrs++; | |
1261 | } | |
1262 | ||
1263 | for (x = 0; x < nptrs; x++) { | |
1264 | error = gfs2_meta_reread(sdp, bh[x], DIO_WAIT); | |
1265 | if (error) { | |
1266 | for (; x < nptrs; x++) | |
1267 | brelse(bh[x]); | |
1268 | goto fail; | |
1269 | } | |
1270 | if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) { | |
1271 | for (; x < nptrs; x++) | |
1272 | brelse(bh[x]); | |
1273 | error = -EIO; | |
1274 | goto fail; | |
1275 | } | |
1276 | ||
d4e9c4c3 | 1277 | gfs2_trans_add_bh(ip->i_gl, bh[x], 1); |
b3b94faa DT |
1278 | |
1279 | memcpy(bh[x]->b_data + sizeof(struct gfs2_meta_header), | |
1280 | data, | |
1281 | (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize); | |
1282 | ||
1283 | amount -= sdp->sd_jbsize; | |
1284 | data += sdp->sd_jbsize; | |
1285 | ||
1286 | brelse(bh[x]); | |
1287 | } | |
1288 | ||
1289 | out: | |
1290 | kfree(bh); | |
1291 | ||
1292 | return error; | |
1293 | ||
1294 | fail: | |
1295 | gfs2_trans_end(sdp); | |
1296 | kfree(bh); | |
1297 | ||
1298 | return error; | |
1299 | } | |
1300 | ||
1301 | int gfs2_ea_acl_chmod(struct gfs2_inode *ip, struct gfs2_ea_location *el, | |
1302 | struct iattr *attr, char *data) | |
1303 | { | |
1304 | struct buffer_head *dibh; | |
1305 | int error; | |
1306 | ||
1307 | if (GFS2_EA_IS_STUFFED(el->el_ea)) { | |
1308 | error = gfs2_trans_begin(ip->i_sbd, RES_DINODE + RES_EATTR, 0); | |
1309 | if (error) | |
1310 | return error; | |
1311 | ||
d4e9c4c3 | 1312 | gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1); |
b3b94faa DT |
1313 | memcpy(GFS2_EA2DATA(el->el_ea), |
1314 | data, | |
1315 | GFS2_EA_DATA_LEN(el->el_ea)); | |
1316 | } else | |
1317 | error = ea_acl_chmod_unstuffed(ip, el->el_ea, data); | |
1318 | ||
1319 | if (error) | |
1320 | return error; | |
1321 | ||
1322 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1323 | if (!error) { | |
1324 | error = inode_setattr(ip->i_vnode, attr); | |
1325 | gfs2_assert_warn(ip->i_sbd, !error); | |
1326 | gfs2_inode_attr_out(ip); | |
d4e9c4c3 | 1327 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
b3b94faa DT |
1328 | gfs2_dinode_out(&ip->i_di, dibh->b_data); |
1329 | brelse(dibh); | |
1330 | } | |
1331 | ||
1332 | gfs2_trans_end(ip->i_sbd); | |
1333 | ||
1334 | return error; | |
1335 | } | |
1336 | ||
1337 | static int ea_dealloc_indirect(struct gfs2_inode *ip) | |
1338 | { | |
1339 | struct gfs2_sbd *sdp = ip->i_sbd; | |
1340 | struct gfs2_rgrp_list rlist; | |
1341 | struct buffer_head *indbh, *dibh; | |
1342 | uint64_t *eablk, *end; | |
1343 | unsigned int rg_blocks = 0; | |
1344 | uint64_t bstart = 0; | |
1345 | unsigned int blen = 0; | |
1346 | unsigned int blks = 0; | |
1347 | unsigned int x; | |
1348 | int error; | |
1349 | ||
1350 | memset(&rlist, 0, sizeof(struct gfs2_rgrp_list)); | |
1351 | ||
1352 | error = gfs2_meta_read(ip->i_gl, ip->i_di.di_eattr, | |
1353 | DIO_START | DIO_WAIT, &indbh); | |
1354 | if (error) | |
1355 | return error; | |
1356 | ||
1357 | if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) { | |
1358 | error = -EIO; | |
1359 | goto out; | |
1360 | } | |
1361 | ||
1362 | eablk = (uint64_t *)(indbh->b_data + sizeof(struct gfs2_meta_header)); | |
1363 | end = eablk + sdp->sd_inptrs; | |
1364 | ||
1365 | for (; eablk < end; eablk++) { | |
1366 | uint64_t bn; | |
1367 | ||
1368 | if (!*eablk) | |
1369 | break; | |
1370 | bn = be64_to_cpu(*eablk); | |
1371 | ||
1372 | if (bstart + blen == bn) | |
1373 | blen++; | |
1374 | else { | |
1375 | if (bstart) | |
1376 | gfs2_rlist_add(sdp, &rlist, bstart); | |
1377 | bstart = bn; | |
1378 | blen = 1; | |
1379 | } | |
1380 | blks++; | |
1381 | } | |
1382 | if (bstart) | |
1383 | gfs2_rlist_add(sdp, &rlist, bstart); | |
1384 | else | |
1385 | goto out; | |
1386 | ||
1387 | gfs2_rlist_alloc(&rlist, LM_ST_EXCLUSIVE, 0); | |
1388 | ||
1389 | for (x = 0; x < rlist.rl_rgrps; x++) { | |
1390 | struct gfs2_rgrpd *rgd; | |
5c676f6d | 1391 | rgd = rlist.rl_ghs[x].gh_gl->gl_object; |
b3b94faa DT |
1392 | rg_blocks += rgd->rd_ri.ri_length; |
1393 | } | |
1394 | ||
1395 | error = gfs2_glock_nq_m(rlist.rl_rgrps, rlist.rl_ghs); | |
1396 | if (error) | |
1397 | goto out_rlist_free; | |
1398 | ||
1399 | error = gfs2_trans_begin(sdp, rg_blocks + RES_DINODE + | |
1400 | RES_INDIRECT + RES_STATFS + | |
1401 | RES_QUOTA, blks); | |
1402 | if (error) | |
1403 | goto out_gunlock; | |
1404 | ||
d4e9c4c3 | 1405 | gfs2_trans_add_bh(ip->i_gl, indbh, 1); |
b3b94faa DT |
1406 | |
1407 | eablk = (uint64_t *)(indbh->b_data + sizeof(struct gfs2_meta_header)); | |
1408 | bstart = 0; | |
1409 | blen = 0; | |
1410 | ||
1411 | for (; eablk < end; eablk++) { | |
1412 | uint64_t bn; | |
1413 | ||
1414 | if (!*eablk) | |
1415 | break; | |
1416 | bn = be64_to_cpu(*eablk); | |
1417 | ||
1418 | if (bstart + blen == bn) | |
1419 | blen++; | |
1420 | else { | |
1421 | if (bstart) | |
1422 | gfs2_free_meta(ip, bstart, blen); | |
1423 | bstart = bn; | |
1424 | blen = 1; | |
1425 | } | |
1426 | ||
1427 | *eablk = 0; | |
1428 | if (!ip->i_di.di_blocks) | |
1429 | gfs2_consist_inode(ip); | |
1430 | ip->i_di.di_blocks--; | |
1431 | } | |
1432 | if (bstart) | |
1433 | gfs2_free_meta(ip, bstart, blen); | |
1434 | ||
1435 | ip->i_di.di_flags &= ~GFS2_DIF_EA_INDIRECT; | |
1436 | ||
1437 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1438 | if (!error) { | |
d4e9c4c3 | 1439 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
b3b94faa DT |
1440 | gfs2_dinode_out(&ip->i_di, dibh->b_data); |
1441 | brelse(dibh); | |
1442 | } | |
1443 | ||
1444 | gfs2_trans_end(sdp); | |
1445 | ||
1446 | out_gunlock: | |
1447 | gfs2_glock_dq_m(rlist.rl_rgrps, rlist.rl_ghs); | |
1448 | ||
1449 | out_rlist_free: | |
1450 | gfs2_rlist_free(&rlist); | |
1451 | ||
1452 | out: | |
1453 | brelse(indbh); | |
1454 | ||
1455 | return error; | |
1456 | } | |
1457 | ||
1458 | static int ea_dealloc_block(struct gfs2_inode *ip) | |
1459 | { | |
1460 | struct gfs2_sbd *sdp = ip->i_sbd; | |
1461 | struct gfs2_alloc *al = &ip->i_alloc; | |
1462 | struct gfs2_rgrpd *rgd; | |
1463 | struct buffer_head *dibh; | |
1464 | int error; | |
1465 | ||
1466 | rgd = gfs2_blk2rgrpd(sdp, ip->i_di.di_eattr); | |
1467 | if (!rgd) { | |
1468 | gfs2_consist_inode(ip); | |
1469 | return -EIO; | |
1470 | } | |
1471 | ||
1472 | error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, | |
1473 | &al->al_rgd_gh); | |
1474 | if (error) | |
1475 | return error; | |
1476 | ||
1477 | error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_DINODE + | |
1478 | RES_STATFS + RES_QUOTA, 1); | |
1479 | if (error) | |
1480 | goto out_gunlock; | |
1481 | ||
1482 | gfs2_free_meta(ip, ip->i_di.di_eattr, 1); | |
1483 | ||
1484 | ip->i_di.di_eattr = 0; | |
1485 | if (!ip->i_di.di_blocks) | |
1486 | gfs2_consist_inode(ip); | |
1487 | ip->i_di.di_blocks--; | |
1488 | ||
1489 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1490 | if (!error) { | |
d4e9c4c3 | 1491 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
b3b94faa DT |
1492 | gfs2_dinode_out(&ip->i_di, dibh->b_data); |
1493 | brelse(dibh); | |
1494 | } | |
1495 | ||
1496 | gfs2_trans_end(sdp); | |
1497 | ||
1498 | out_gunlock: | |
1499 | gfs2_glock_dq_uninit(&al->al_rgd_gh); | |
1500 | ||
1501 | return error; | |
1502 | } | |
1503 | ||
1504 | /** | |
1505 | * gfs2_ea_dealloc - deallocate the extended attribute fork | |
1506 | * @ip: the inode | |
1507 | * | |
1508 | * Returns: errno | |
1509 | */ | |
1510 | ||
1511 | int gfs2_ea_dealloc(struct gfs2_inode *ip) | |
1512 | { | |
1513 | struct gfs2_alloc *al; | |
1514 | int error; | |
1515 | ||
1516 | al = gfs2_alloc_get(ip); | |
1517 | ||
1518 | error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE); | |
1519 | if (error) | |
1520 | goto out_alloc; | |
1521 | ||
1522 | error = gfs2_rindex_hold(ip->i_sbd, &al->al_ri_gh); | |
1523 | if (error) | |
1524 | goto out_quota; | |
1525 | ||
1526 | error = ea_foreach(ip, ea_dealloc_unstuffed, NULL); | |
1527 | if (error) | |
1528 | goto out_rindex; | |
1529 | ||
1530 | if (ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT) { | |
1531 | error = ea_dealloc_indirect(ip); | |
1532 | if (error) | |
1533 | goto out_rindex; | |
1534 | } | |
1535 | ||
1536 | error = ea_dealloc_block(ip); | |
1537 | ||
1538 | out_rindex: | |
1539 | gfs2_glock_dq_uninit(&al->al_ri_gh); | |
1540 | ||
1541 | out_quota: | |
1542 | gfs2_quota_unhold(ip); | |
1543 | ||
1544 | out_alloc: | |
1545 | gfs2_alloc_put(ip); | |
1546 | ||
1547 | return error; | |
1548 | } | |
1549 |