Commit | Line | Data |
---|---|---|
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 | |
e9fc2aa0 | 7 | * of the GNU General Public License version 2. |
b3b94faa DT |
8 | */ |
9 | ||
b3b94faa DT |
10 | #include <linux/slab.h> |
11 | #include <linux/spinlock.h> | |
12 | #include <linux/completion.h> | |
13 | #include <linux/buffer_head.h> | |
14 | #include <linux/xattr.h> | |
5c676f6d | 15 | #include <linux/gfs2_ondisk.h> |
b3b94faa DT |
16 | #include <asm/uaccess.h> |
17 | ||
18 | #include "gfs2.h" | |
5c676f6d | 19 | #include "incore.h" |
b3b94faa DT |
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" | |
5c676f6d | 29 | #include "util.h" |
b3b94faa DT |
30 | |
31 | /** | |
32 | * ea_calc_size - returns the acutal number of bytes the request will take up | |
33 | * (not counting any unstuffed data blocks) | |
34 | * @sdp: | |
35 | * @er: | |
36 | * @size: | |
37 | * | |
38 | * Returns: 1 if the EA should be stuffed | |
39 | */ | |
40 | ||
41 | static int ea_calc_size(struct gfs2_sbd *sdp, struct gfs2_ea_request *er, | |
42 | unsigned int *size) | |
43 | { | |
44 | *size = GFS2_EAREQ_SIZE_STUFFED(er); | |
45 | if (*size <= sdp->sd_jbsize) | |
46 | return 1; | |
47 | ||
48 | *size = GFS2_EAREQ_SIZE_UNSTUFFED(sdp, er); | |
49 | ||
50 | return 0; | |
51 | } | |
52 | ||
53 | static int ea_check_size(struct gfs2_sbd *sdp, struct gfs2_ea_request *er) | |
54 | { | |
55 | unsigned int size; | |
56 | ||
57 | if (er->er_data_len > GFS2_EA_MAX_DATA_LEN) | |
58 | return -ERANGE; | |
59 | ||
60 | ea_calc_size(sdp, er, &size); | |
61 | ||
62 | /* This can only happen with 512 byte blocks */ | |
63 | if (size > sdp->sd_jbsize) | |
64 | return -ERANGE; | |
65 | ||
66 | return 0; | |
67 | } | |
68 | ||
cca195c5 | 69 | typedef int (*ea_call_t) (struct gfs2_inode *ip, struct buffer_head *bh, |
b3b94faa | 70 | struct gfs2_ea_header *ea, |
cca195c5 | 71 | struct gfs2_ea_header *prev, void *private); |
b3b94faa DT |
72 | |
73 | static int ea_foreach_i(struct gfs2_inode *ip, struct buffer_head *bh, | |
74 | ea_call_t ea_call, void *data) | |
75 | { | |
76 | struct gfs2_ea_header *ea, *prev = NULL; | |
77 | int error = 0; | |
78 | ||
feaa7bba | 79 | if (gfs2_metatype_check(GFS2_SB(&ip->i_inode), bh, GFS2_METATYPE_EA)) |
b3b94faa DT |
80 | return -EIO; |
81 | ||
82 | for (ea = GFS2_EA_BH2FIRST(bh);; prev = ea, ea = GFS2_EA2NEXT(ea)) { | |
83 | if (!GFS2_EA_REC_LEN(ea)) | |
84 | goto fail; | |
cca195c5 SW |
85 | if (!(bh->b_data <= (char *)ea && (char *)GFS2_EA2NEXT(ea) <= |
86 | bh->b_data + bh->b_size)) | |
b3b94faa DT |
87 | goto fail; |
88 | if (!GFS2_EATYPE_VALID(ea->ea_type)) | |
89 | goto fail; | |
90 | ||
91 | error = ea_call(ip, bh, ea, prev, data); | |
92 | if (error) | |
93 | return error; | |
94 | ||
95 | if (GFS2_EA_IS_LAST(ea)) { | |
96 | if ((char *)GFS2_EA2NEXT(ea) != | |
97 | bh->b_data + bh->b_size) | |
98 | goto fail; | |
99 | break; | |
100 | } | |
101 | } | |
102 | ||
103 | return error; | |
104 | ||
a91ea69f | 105 | fail: |
b3b94faa DT |
106 | gfs2_consist_inode(ip); |
107 | return -EIO; | |
108 | } | |
109 | ||
110 | static int ea_foreach(struct gfs2_inode *ip, ea_call_t ea_call, void *data) | |
111 | { | |
112 | struct buffer_head *bh, *eabh; | |
b44b84d7 | 113 | __be64 *eablk, *end; |
b3b94faa DT |
114 | int error; |
115 | ||
3767ac21 | 116 | error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT, &bh); |
b3b94faa DT |
117 | if (error) |
118 | return error; | |
119 | ||
383f01fb | 120 | if (!(ip->i_diskflags & GFS2_DIF_EA_INDIRECT)) { |
b3b94faa DT |
121 | error = ea_foreach_i(ip, bh, ea_call, data); |
122 | goto out; | |
123 | } | |
124 | ||
feaa7bba | 125 | if (gfs2_metatype_check(GFS2_SB(&ip->i_inode), bh, GFS2_METATYPE_IN)) { |
b3b94faa DT |
126 | error = -EIO; |
127 | goto out; | |
128 | } | |
129 | ||
b44b84d7 | 130 | eablk = (__be64 *)(bh->b_data + sizeof(struct gfs2_meta_header)); |
feaa7bba | 131 | end = eablk + GFS2_SB(&ip->i_inode)->sd_inptrs; |
b3b94faa DT |
132 | |
133 | for (; eablk < end; eablk++) { | |
cd915493 | 134 | u64 bn; |
b3b94faa DT |
135 | |
136 | if (!*eablk) | |
137 | break; | |
138 | bn = be64_to_cpu(*eablk); | |
139 | ||
7276b3b0 | 140 | error = gfs2_meta_read(ip->i_gl, bn, DIO_WAIT, &eabh); |
b3b94faa DT |
141 | if (error) |
142 | break; | |
143 | error = ea_foreach_i(ip, eabh, ea_call, data); | |
144 | brelse(eabh); | |
145 | if (error) | |
146 | break; | |
147 | } | |
a91ea69f | 148 | out: |
b3b94faa | 149 | brelse(bh); |
b3b94faa DT |
150 | return error; |
151 | } | |
152 | ||
153 | struct ea_find { | |
154 | struct gfs2_ea_request *ef_er; | |
155 | struct gfs2_ea_location *ef_el; | |
156 | }; | |
157 | ||
158 | static int ea_find_i(struct gfs2_inode *ip, struct buffer_head *bh, | |
159 | struct gfs2_ea_header *ea, struct gfs2_ea_header *prev, | |
160 | void *private) | |
161 | { | |
162 | struct ea_find *ef = private; | |
163 | struct gfs2_ea_request *er = ef->ef_er; | |
164 | ||
165 | if (ea->ea_type == GFS2_EATYPE_UNUSED) | |
166 | return 0; | |
167 | ||
168 | if (ea->ea_type == er->er_type) { | |
169 | if (ea->ea_name_len == er->er_name_len && | |
170 | !memcmp(GFS2_EA2NAME(ea), er->er_name, ea->ea_name_len)) { | |
171 | struct gfs2_ea_location *el = ef->ef_el; | |
172 | get_bh(bh); | |
173 | el->el_bh = bh; | |
174 | el->el_ea = ea; | |
175 | el->el_prev = prev; | |
176 | return 1; | |
177 | } | |
178 | } | |
179 | ||
b3b94faa DT |
180 | return 0; |
181 | } | |
182 | ||
183 | int gfs2_ea_find(struct gfs2_inode *ip, struct gfs2_ea_request *er, | |
184 | struct gfs2_ea_location *el) | |
185 | { | |
186 | struct ea_find ef; | |
187 | int error; | |
188 | ||
189 | ef.ef_er = er; | |
190 | ef.ef_el = el; | |
191 | ||
192 | memset(el, 0, sizeof(struct gfs2_ea_location)); | |
193 | ||
194 | error = ea_foreach(ip, ea_find_i, &ef); | |
195 | if (error > 0) | |
196 | return 0; | |
197 | ||
198 | return error; | |
199 | } | |
200 | ||
201 | /** | |
202 | * ea_dealloc_unstuffed - | |
203 | * @ip: | |
204 | * @bh: | |
205 | * @ea: | |
206 | * @prev: | |
207 | * @private: | |
208 | * | |
209 | * Take advantage of the fact that all unstuffed blocks are | |
210 | * allocated from the same RG. But watch, this may not always | |
211 | * be true. | |
212 | * | |
213 | * Returns: errno | |
214 | */ | |
215 | ||
216 | static int ea_dealloc_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh, | |
217 | struct gfs2_ea_header *ea, | |
218 | struct gfs2_ea_header *prev, void *private) | |
219 | { | |
220 | int *leave = private; | |
feaa7bba | 221 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa DT |
222 | struct gfs2_rgrpd *rgd; |
223 | struct gfs2_holder rg_gh; | |
224 | struct buffer_head *dibh; | |
b44b84d7 AV |
225 | __be64 *dataptrs; |
226 | u64 bn = 0; | |
cd915493 | 227 | u64 bstart = 0; |
b3b94faa DT |
228 | unsigned int blen = 0; |
229 | unsigned int blks = 0; | |
230 | unsigned int x; | |
231 | int error; | |
232 | ||
233 | if (GFS2_EA_IS_STUFFED(ea)) | |
234 | return 0; | |
235 | ||
236 | dataptrs = GFS2_EA2DATAPTRS(ea); | |
cca195c5 | 237 | for (x = 0; x < ea->ea_num_ptrs; x++, dataptrs++) { |
b3b94faa DT |
238 | if (*dataptrs) { |
239 | blks++; | |
240 | bn = be64_to_cpu(*dataptrs); | |
241 | } | |
cca195c5 | 242 | } |
b3b94faa DT |
243 | if (!blks) |
244 | return 0; | |
245 | ||
246 | rgd = gfs2_blk2rgrpd(sdp, bn); | |
247 | if (!rgd) { | |
248 | gfs2_consist_inode(ip); | |
249 | return -EIO; | |
250 | } | |
251 | ||
252 | error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &rg_gh); | |
253 | if (error) | |
254 | return error; | |
255 | ||
bb8d8a6f | 256 | error = gfs2_trans_begin(sdp, rgd->rd_length + RES_DINODE + |
cca195c5 | 257 | RES_EATTR + RES_STATFS + RES_QUOTA, blks); |
b3b94faa DT |
258 | if (error) |
259 | goto out_gunlock; | |
260 | ||
d4e9c4c3 | 261 | gfs2_trans_add_bh(ip->i_gl, bh, 1); |
b3b94faa DT |
262 | |
263 | dataptrs = GFS2_EA2DATAPTRS(ea); | |
264 | for (x = 0; x < ea->ea_num_ptrs; x++, dataptrs++) { | |
265 | if (!*dataptrs) | |
266 | break; | |
267 | bn = be64_to_cpu(*dataptrs); | |
268 | ||
269 | if (bstart + blen == bn) | |
270 | blen++; | |
271 | else { | |
272 | if (bstart) | |
273 | gfs2_free_meta(ip, bstart, blen); | |
274 | bstart = bn; | |
275 | blen = 1; | |
276 | } | |
277 | ||
278 | *dataptrs = 0; | |
77658aad | 279 | gfs2_add_inode_blocks(&ip->i_inode, -1); |
b3b94faa DT |
280 | } |
281 | if (bstart) | |
282 | gfs2_free_meta(ip, bstart, blen); | |
283 | ||
284 | if (prev && !leave) { | |
cd915493 | 285 | u32 len; |
b3b94faa DT |
286 | |
287 | len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea); | |
288 | prev->ea_rec_len = cpu_to_be32(len); | |
289 | ||
290 | if (GFS2_EA_IS_LAST(ea)) | |
291 | prev->ea_flags |= GFS2_EAFLAG_LAST; | |
292 | } else { | |
293 | ea->ea_type = GFS2_EATYPE_UNUSED; | |
294 | ea->ea_num_ptrs = 0; | |
295 | } | |
296 | ||
297 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
298 | if (!error) { | |
4bd91ba1 | 299 | ip->i_inode.i_ctime = CURRENT_TIME; |
d4e9c4c3 | 300 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
539e5d6b | 301 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa DT |
302 | brelse(dibh); |
303 | } | |
304 | ||
305 | gfs2_trans_end(sdp); | |
306 | ||
a91ea69f | 307 | out_gunlock: |
b3b94faa | 308 | gfs2_glock_dq_uninit(&rg_gh); |
b3b94faa DT |
309 | return error; |
310 | } | |
311 | ||
312 | static int ea_remove_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh, | |
313 | struct gfs2_ea_header *ea, | |
314 | struct gfs2_ea_header *prev, int leave) | |
315 | { | |
316 | struct gfs2_alloc *al; | |
317 | int error; | |
318 | ||
319 | al = gfs2_alloc_get(ip); | |
182fe5ab CG |
320 | if (!al) |
321 | return -ENOMEM; | |
b3b94faa DT |
322 | |
323 | error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE); | |
324 | if (error) | |
325 | goto out_alloc; | |
326 | ||
feaa7bba | 327 | error = gfs2_rindex_hold(GFS2_SB(&ip->i_inode), &al->al_ri_gh); |
b3b94faa DT |
328 | if (error) |
329 | goto out_quota; | |
330 | ||
cca195c5 | 331 | error = ea_dealloc_unstuffed(ip, bh, ea, prev, (leave) ? &error : NULL); |
b3b94faa DT |
332 | |
333 | gfs2_glock_dq_uninit(&al->al_ri_gh); | |
334 | ||
a91ea69f | 335 | out_quota: |
b3b94faa | 336 | gfs2_quota_unhold(ip); |
a91ea69f | 337 | out_alloc: |
b3b94faa | 338 | gfs2_alloc_put(ip); |
b3b94faa DT |
339 | return error; |
340 | } | |
341 | ||
b3b94faa DT |
342 | struct ea_list { |
343 | struct gfs2_ea_request *ei_er; | |
344 | unsigned int ei_size; | |
345 | }; | |
346 | ||
347 | static int ea_list_i(struct gfs2_inode *ip, struct buffer_head *bh, | |
348 | struct gfs2_ea_header *ea, struct gfs2_ea_header *prev, | |
349 | void *private) | |
350 | { | |
351 | struct ea_list *ei = private; | |
352 | struct gfs2_ea_request *er = ei->ei_er; | |
639b6d79 | 353 | unsigned int ea_size = gfs2_ea_strlen(ea); |
b3b94faa DT |
354 | |
355 | if (ea->ea_type == GFS2_EATYPE_UNUSED) | |
356 | return 0; | |
357 | ||
358 | if (er->er_data_len) { | |
01eb7c07 SW |
359 | char *prefix = NULL; |
360 | unsigned int l = 0; | |
b3b94faa DT |
361 | char c = 0; |
362 | ||
363 | if (ei->ei_size + ea_size > er->er_data_len) | |
364 | return -ERANGE; | |
365 | ||
639b6d79 RH |
366 | switch (ea->ea_type) { |
367 | case GFS2_EATYPE_USR: | |
b3b94faa DT |
368 | prefix = "user."; |
369 | l = 5; | |
639b6d79 RH |
370 | break; |
371 | case GFS2_EATYPE_SYS: | |
b3b94faa DT |
372 | prefix = "system."; |
373 | l = 7; | |
639b6d79 RH |
374 | break; |
375 | case GFS2_EATYPE_SECURITY: | |
376 | prefix = "security."; | |
377 | l = 9; | |
378 | break; | |
b3b94faa DT |
379 | } |
380 | ||
01eb7c07 SW |
381 | BUG_ON(l == 0); |
382 | ||
90cdd208 SW |
383 | memcpy(er->er_data + ei->ei_size, prefix, l); |
384 | memcpy(er->er_data + ei->ei_size + l, GFS2_EA2NAME(ea), | |
b3b94faa | 385 | ea->ea_name_len); |
90cdd208 | 386 | memcpy(er->er_data + ei->ei_size + ea_size - 1, &c, 1); |
b3b94faa DT |
387 | } |
388 | ||
389 | ei->ei_size += ea_size; | |
390 | ||
391 | return 0; | |
392 | } | |
393 | ||
394 | /** | |
395 | * gfs2_ea_list - | |
396 | * @ip: | |
397 | * @er: | |
398 | * | |
399 | * Returns: actual size of data on success, -errno on error | |
400 | */ | |
401 | ||
402 | int gfs2_ea_list(struct gfs2_inode *ip, struct gfs2_ea_request *er) | |
403 | { | |
404 | struct gfs2_holder i_gh; | |
405 | int error; | |
406 | ||
407 | if (!er->er_data || !er->er_data_len) { | |
408 | er->er_data = NULL; | |
409 | er->er_data_len = 0; | |
410 | } | |
411 | ||
cca195c5 | 412 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh); |
b3b94faa DT |
413 | if (error) |
414 | return error; | |
415 | ||
3767ac21 | 416 | if (ip->i_eattr) { |
b3b94faa DT |
417 | struct ea_list ei = { .ei_er = er, .ei_size = 0 }; |
418 | ||
419 | error = ea_foreach(ip, ea_list_i, &ei); | |
420 | if (!error) | |
421 | error = ei.ei_size; | |
422 | } | |
423 | ||
424 | gfs2_glock_dq_uninit(&i_gh); | |
425 | ||
426 | return error; | |
427 | } | |
428 | ||
429 | /** | |
430 | * ea_get_unstuffed - actually copies the unstuffed data into the | |
431 | * request buffer | |
cca195c5 SW |
432 | * @ip: The GFS2 inode |
433 | * @ea: The extended attribute header structure | |
434 | * @data: The data to be copied | |
b3b94faa DT |
435 | * |
436 | * Returns: errno | |
437 | */ | |
438 | ||
439 | static int ea_get_unstuffed(struct gfs2_inode *ip, struct gfs2_ea_header *ea, | |
440 | char *data) | |
441 | { | |
feaa7bba | 442 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa DT |
443 | struct buffer_head **bh; |
444 | unsigned int amount = GFS2_EA_DATA_LEN(ea); | |
5c676f6d | 445 | unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize); |
b44b84d7 | 446 | __be64 *dataptrs = GFS2_EA2DATAPTRS(ea); |
b3b94faa DT |
447 | unsigned int x; |
448 | int error = 0; | |
449 | ||
16c5f06f | 450 | bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_NOFS); |
b3b94faa DT |
451 | if (!bh) |
452 | return -ENOMEM; | |
453 | ||
454 | for (x = 0; x < nptrs; x++) { | |
7276b3b0 SW |
455 | error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs), 0, |
456 | bh + x); | |
b3b94faa DT |
457 | if (error) { |
458 | while (x--) | |
459 | brelse(bh[x]); | |
460 | goto out; | |
461 | } | |
462 | dataptrs++; | |
463 | } | |
464 | ||
465 | for (x = 0; x < nptrs; x++) { | |
7276b3b0 | 466 | error = gfs2_meta_wait(sdp, bh[x]); |
b3b94faa DT |
467 | if (error) { |
468 | for (; x < nptrs; x++) | |
469 | brelse(bh[x]); | |
470 | goto out; | |
471 | } | |
472 | if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) { | |
473 | for (; x < nptrs; x++) | |
474 | brelse(bh[x]); | |
475 | error = -EIO; | |
476 | goto out; | |
477 | } | |
478 | ||
cca195c5 | 479 | memcpy(data, bh[x]->b_data + sizeof(struct gfs2_meta_header), |
b3b94faa DT |
480 | (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize); |
481 | ||
482 | amount -= sdp->sd_jbsize; | |
483 | data += sdp->sd_jbsize; | |
484 | ||
485 | brelse(bh[x]); | |
486 | } | |
487 | ||
a91ea69f | 488 | out: |
b3b94faa | 489 | kfree(bh); |
b3b94faa DT |
490 | return error; |
491 | } | |
492 | ||
493 | int gfs2_ea_get_copy(struct gfs2_inode *ip, struct gfs2_ea_location *el, | |
494 | char *data) | |
495 | { | |
496 | if (GFS2_EA_IS_STUFFED(el->el_ea)) { | |
cca195c5 | 497 | memcpy(data, GFS2_EA2DATA(el->el_ea), GFS2_EA_DATA_LEN(el->el_ea)); |
b3b94faa DT |
498 | return 0; |
499 | } else | |
500 | return ea_get_unstuffed(ip, el->el_ea, data); | |
501 | } | |
502 | ||
503 | /** | |
504 | * gfs2_ea_get_i - | |
cca195c5 SW |
505 | * @ip: The GFS2 inode |
506 | * @er: The request structure | |
b3b94faa DT |
507 | * |
508 | * Returns: actual size of data on success, -errno on error | |
509 | */ | |
510 | ||
511 | int gfs2_ea_get_i(struct gfs2_inode *ip, struct gfs2_ea_request *er) | |
512 | { | |
513 | struct gfs2_ea_location el; | |
514 | int error; | |
515 | ||
3767ac21 | 516 | if (!ip->i_eattr) |
b3b94faa DT |
517 | return -ENODATA; |
518 | ||
519 | error = gfs2_ea_find(ip, er, &el); | |
520 | if (error) | |
521 | return error; | |
522 | if (!el.el_ea) | |
523 | return -ENODATA; | |
524 | ||
525 | if (er->er_data_len) { | |
526 | if (GFS2_EA_DATA_LEN(el.el_ea) > er->er_data_len) | |
527 | error = -ERANGE; | |
528 | else | |
529 | error = gfs2_ea_get_copy(ip, &el, er->er_data); | |
530 | } | |
531 | if (!error) | |
532 | error = GFS2_EA_DATA_LEN(el.el_ea); | |
533 | ||
534 | brelse(el.el_bh); | |
535 | ||
536 | return error; | |
537 | } | |
538 | ||
539 | /** | |
540 | * gfs2_ea_get - | |
cca195c5 SW |
541 | * @ip: The GFS2 inode |
542 | * @er: The request structure | |
b3b94faa DT |
543 | * |
544 | * Returns: actual size of data on success, -errno on error | |
545 | */ | |
546 | ||
547 | int gfs2_ea_get(struct gfs2_inode *ip, struct gfs2_ea_request *er) | |
548 | { | |
549 | struct gfs2_holder i_gh; | |
550 | int error; | |
551 | ||
552 | if (!er->er_name_len || | |
553 | er->er_name_len > GFS2_EA_MAX_NAME_LEN) | |
554 | return -EINVAL; | |
555 | if (!er->er_data || !er->er_data_len) { | |
556 | er->er_data = NULL; | |
557 | er->er_data_len = 0; | |
558 | } | |
559 | ||
cca195c5 | 560 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh); |
b3b94faa DT |
561 | if (error) |
562 | return error; | |
563 | ||
564 | error = gfs2_ea_ops[er->er_type]->eo_get(ip, er); | |
565 | ||
566 | gfs2_glock_dq_uninit(&i_gh); | |
567 | ||
568 | return error; | |
569 | } | |
570 | ||
571 | /** | |
572 | * ea_alloc_blk - allocates a new block for extended attributes. | |
573 | * @ip: A pointer to the inode that's getting extended attributes | |
cca195c5 | 574 | * @bhp: Pointer to pointer to a struct buffer_head |
b3b94faa DT |
575 | * |
576 | * Returns: errno | |
577 | */ | |
578 | ||
579 | static int ea_alloc_blk(struct gfs2_inode *ip, struct buffer_head **bhp) | |
580 | { | |
feaa7bba | 581 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa | 582 | struct gfs2_ea_header *ea; |
b45e41d7 | 583 | unsigned int n = 1; |
cd915493 | 584 | u64 block; |
b3b94faa | 585 | |
b45e41d7 | 586 | block = gfs2_alloc_block(ip, &n); |
5731be53 | 587 | gfs2_trans_add_unrevoke(sdp, block, 1); |
b3b94faa | 588 | *bhp = gfs2_meta_new(ip->i_gl, block); |
d4e9c4c3 | 589 | gfs2_trans_add_bh(ip->i_gl, *bhp, 1); |
b3b94faa DT |
590 | gfs2_metatype_set(*bhp, GFS2_METATYPE_EA, GFS2_FORMAT_EA); |
591 | gfs2_buffer_clear_tail(*bhp, sizeof(struct gfs2_meta_header)); | |
592 | ||
593 | ea = GFS2_EA_BH2FIRST(*bhp); | |
594 | ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize); | |
595 | ea->ea_type = GFS2_EATYPE_UNUSED; | |
596 | ea->ea_flags = GFS2_EAFLAG_LAST; | |
597 | ea->ea_num_ptrs = 0; | |
598 | ||
77658aad | 599 | gfs2_add_inode_blocks(&ip->i_inode, 1); |
b3b94faa DT |
600 | |
601 | return 0; | |
602 | } | |
603 | ||
604 | /** | |
605 | * ea_write - writes the request info to an ea, creating new blocks if | |
606 | * necessary | |
cca195c5 SW |
607 | * @ip: inode that is being modified |
608 | * @ea: the location of the new ea in a block | |
b3b94faa DT |
609 | * @er: the write request |
610 | * | |
611 | * Note: does not update ea_rec_len or the GFS2_EAFLAG_LAST bin of ea_flags | |
612 | * | |
613 | * returns : errno | |
614 | */ | |
615 | ||
616 | static int ea_write(struct gfs2_inode *ip, struct gfs2_ea_header *ea, | |
617 | struct gfs2_ea_request *er) | |
618 | { | |
feaa7bba | 619 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa DT |
620 | |
621 | ea->ea_data_len = cpu_to_be32(er->er_data_len); | |
622 | ea->ea_name_len = er->er_name_len; | |
623 | ea->ea_type = er->er_type; | |
624 | ea->__pad = 0; | |
625 | ||
626 | memcpy(GFS2_EA2NAME(ea), er->er_name, er->er_name_len); | |
627 | ||
628 | if (GFS2_EAREQ_SIZE_STUFFED(er) <= sdp->sd_jbsize) { | |
629 | ea->ea_num_ptrs = 0; | |
630 | memcpy(GFS2_EA2DATA(ea), er->er_data, er->er_data_len); | |
631 | } else { | |
b44b84d7 | 632 | __be64 *dataptr = GFS2_EA2DATAPTRS(ea); |
b3b94faa DT |
633 | const char *data = er->er_data; |
634 | unsigned int data_len = er->er_data_len; | |
635 | unsigned int copy; | |
636 | unsigned int x; | |
637 | ||
5c676f6d | 638 | ea->ea_num_ptrs = DIV_ROUND_UP(er->er_data_len, sdp->sd_jbsize); |
b3b94faa DT |
639 | for (x = 0; x < ea->ea_num_ptrs; x++) { |
640 | struct buffer_head *bh; | |
cd915493 | 641 | u64 block; |
b3b94faa | 642 | int mh_size = sizeof(struct gfs2_meta_header); |
b45e41d7 | 643 | unsigned int n = 1; |
b3b94faa | 644 | |
b45e41d7 | 645 | block = gfs2_alloc_block(ip, &n); |
5731be53 | 646 | gfs2_trans_add_unrevoke(sdp, block, 1); |
b3b94faa | 647 | bh = gfs2_meta_new(ip->i_gl, block); |
d4e9c4c3 | 648 | gfs2_trans_add_bh(ip->i_gl, bh, 1); |
b3b94faa DT |
649 | gfs2_metatype_set(bh, GFS2_METATYPE_ED, GFS2_FORMAT_ED); |
650 | ||
77658aad | 651 | gfs2_add_inode_blocks(&ip->i_inode, 1); |
b3b94faa | 652 | |
cca195c5 SW |
653 | copy = data_len > sdp->sd_jbsize ? sdp->sd_jbsize : |
654 | data_len; | |
b3b94faa DT |
655 | memcpy(bh->b_data + mh_size, data, copy); |
656 | if (copy < sdp->sd_jbsize) | |
657 | memset(bh->b_data + mh_size + copy, 0, | |
658 | sdp->sd_jbsize - copy); | |
659 | ||
cca195c5 | 660 | *dataptr++ = cpu_to_be64(bh->b_blocknr); |
b3b94faa DT |
661 | data += copy; |
662 | data_len -= copy; | |
663 | ||
664 | brelse(bh); | |
665 | } | |
666 | ||
667 | gfs2_assert_withdraw(sdp, !data_len); | |
668 | } | |
669 | ||
670 | return 0; | |
671 | } | |
672 | ||
673 | typedef int (*ea_skeleton_call_t) (struct gfs2_inode *ip, | |
cca195c5 | 674 | struct gfs2_ea_request *er, void *private); |
b3b94faa DT |
675 | |
676 | static int ea_alloc_skeleton(struct gfs2_inode *ip, struct gfs2_ea_request *er, | |
677 | unsigned int blks, | |
cca195c5 | 678 | ea_skeleton_call_t skeleton_call, void *private) |
b3b94faa DT |
679 | { |
680 | struct gfs2_alloc *al; | |
681 | struct buffer_head *dibh; | |
682 | int error; | |
683 | ||
684 | al = gfs2_alloc_get(ip); | |
182fe5ab CG |
685 | if (!al) |
686 | return -ENOMEM; | |
b3b94faa | 687 | |
d82661d9 | 688 | error = gfs2_quota_lock_check(ip); |
b3b94faa DT |
689 | if (error) |
690 | goto out; | |
691 | ||
b3b94faa DT |
692 | al->al_requested = blks; |
693 | ||
694 | error = gfs2_inplace_reserve(ip); | |
695 | if (error) | |
696 | goto out_gunlock_q; | |
697 | ||
feaa7bba | 698 | error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), |
bb8d8a6f | 699 | blks + al->al_rgd->rd_length + |
b3b94faa DT |
700 | RES_DINODE + RES_STATFS + RES_QUOTA, 0); |
701 | if (error) | |
702 | goto out_ipres; | |
703 | ||
704 | error = skeleton_call(ip, er, private); | |
705 | if (error) | |
706 | goto out_end_trans; | |
707 | ||
708 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
709 | if (!error) { | |
710 | if (er->er_flags & GFS2_ERF_MODE) { | |
feaa7bba | 711 | gfs2_assert_withdraw(GFS2_SB(&ip->i_inode), |
b60623c2 | 712 | (ip->i_inode.i_mode & S_IFMT) == |
b3b94faa | 713 | (er->er_mode & S_IFMT)); |
b60623c2 | 714 | ip->i_inode.i_mode = er->er_mode; |
b3b94faa | 715 | } |
4bd91ba1 | 716 | ip->i_inode.i_ctime = CURRENT_TIME; |
d4e9c4c3 | 717 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
539e5d6b | 718 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa DT |
719 | brelse(dibh); |
720 | } | |
721 | ||
a91ea69f | 722 | out_end_trans: |
feaa7bba | 723 | gfs2_trans_end(GFS2_SB(&ip->i_inode)); |
a91ea69f | 724 | out_ipres: |
b3b94faa | 725 | gfs2_inplace_release(ip); |
a91ea69f | 726 | out_gunlock_q: |
b3b94faa | 727 | gfs2_quota_unlock(ip); |
a91ea69f | 728 | out: |
b3b94faa | 729 | gfs2_alloc_put(ip); |
b3b94faa DT |
730 | return error; |
731 | } | |
732 | ||
733 | static int ea_init_i(struct gfs2_inode *ip, struct gfs2_ea_request *er, | |
734 | void *private) | |
735 | { | |
736 | struct buffer_head *bh; | |
737 | int error; | |
738 | ||
739 | error = ea_alloc_blk(ip, &bh); | |
740 | if (error) | |
741 | return error; | |
742 | ||
3767ac21 | 743 | ip->i_eattr = bh->b_blocknr; |
b3b94faa DT |
744 | error = ea_write(ip, GFS2_EA_BH2FIRST(bh), er); |
745 | ||
746 | brelse(bh); | |
747 | ||
748 | return error; | |
749 | } | |
750 | ||
751 | /** | |
752 | * ea_init - initializes a new eattr block | |
753 | * @ip: | |
754 | * @er: | |
755 | * | |
756 | * Returns: errno | |
757 | */ | |
758 | ||
759 | static int ea_init(struct gfs2_inode *ip, struct gfs2_ea_request *er) | |
760 | { | |
feaa7bba | 761 | unsigned int jbsize = GFS2_SB(&ip->i_inode)->sd_jbsize; |
b3b94faa DT |
762 | unsigned int blks = 1; |
763 | ||
764 | if (GFS2_EAREQ_SIZE_STUFFED(er) > jbsize) | |
5c676f6d | 765 | blks += DIV_ROUND_UP(er->er_data_len, jbsize); |
b3b94faa DT |
766 | |
767 | return ea_alloc_skeleton(ip, er, blks, ea_init_i, NULL); | |
768 | } | |
769 | ||
770 | static struct gfs2_ea_header *ea_split_ea(struct gfs2_ea_header *ea) | |
771 | { | |
cd915493 | 772 | u32 ea_size = GFS2_EA_SIZE(ea); |
568f4c96 SW |
773 | struct gfs2_ea_header *new = (struct gfs2_ea_header *)((char *)ea + |
774 | ea_size); | |
cd915493 | 775 | u32 new_size = GFS2_EA_REC_LEN(ea) - ea_size; |
b3b94faa DT |
776 | int last = ea->ea_flags & GFS2_EAFLAG_LAST; |
777 | ||
778 | ea->ea_rec_len = cpu_to_be32(ea_size); | |
779 | ea->ea_flags ^= last; | |
780 | ||
781 | new->ea_rec_len = cpu_to_be32(new_size); | |
782 | new->ea_flags = last; | |
783 | ||
784 | return new; | |
785 | } | |
786 | ||
787 | static void ea_set_remove_stuffed(struct gfs2_inode *ip, | |
788 | struct gfs2_ea_location *el) | |
789 | { | |
790 | struct gfs2_ea_header *ea = el->el_ea; | |
791 | struct gfs2_ea_header *prev = el->el_prev; | |
cd915493 | 792 | u32 len; |
b3b94faa | 793 | |
d4e9c4c3 | 794 | gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1); |
b3b94faa DT |
795 | |
796 | if (!prev || !GFS2_EA_IS_STUFFED(ea)) { | |
797 | ea->ea_type = GFS2_EATYPE_UNUSED; | |
798 | return; | |
799 | } else if (GFS2_EA2NEXT(prev) != ea) { | |
800 | prev = GFS2_EA2NEXT(prev); | |
feaa7bba | 801 | gfs2_assert_withdraw(GFS2_SB(&ip->i_inode), GFS2_EA2NEXT(prev) == ea); |
b3b94faa DT |
802 | } |
803 | ||
804 | len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea); | |
805 | prev->ea_rec_len = cpu_to_be32(len); | |
806 | ||
807 | if (GFS2_EA_IS_LAST(ea)) | |
808 | prev->ea_flags |= GFS2_EAFLAG_LAST; | |
809 | } | |
810 | ||
811 | struct ea_set { | |
812 | int ea_split; | |
813 | ||
814 | struct gfs2_ea_request *es_er; | |
815 | struct gfs2_ea_location *es_el; | |
816 | ||
817 | struct buffer_head *es_bh; | |
818 | struct gfs2_ea_header *es_ea; | |
819 | }; | |
820 | ||
821 | static int ea_set_simple_noalloc(struct gfs2_inode *ip, struct buffer_head *bh, | |
822 | struct gfs2_ea_header *ea, struct ea_set *es) | |
823 | { | |
824 | struct gfs2_ea_request *er = es->es_er; | |
825 | struct buffer_head *dibh; | |
826 | int error; | |
827 | ||
feaa7bba | 828 | error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + 2 * RES_EATTR, 0); |
b3b94faa DT |
829 | if (error) |
830 | return error; | |
831 | ||
d4e9c4c3 | 832 | gfs2_trans_add_bh(ip->i_gl, bh, 1); |
b3b94faa DT |
833 | |
834 | if (es->ea_split) | |
835 | ea = ea_split_ea(ea); | |
836 | ||
837 | ea_write(ip, ea, er); | |
838 | ||
839 | if (es->es_el) | |
840 | ea_set_remove_stuffed(ip, es->es_el); | |
841 | ||
842 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
843 | if (error) | |
844 | goto out; | |
845 | ||
846 | if (er->er_flags & GFS2_ERF_MODE) { | |
feaa7bba | 847 | gfs2_assert_withdraw(GFS2_SB(&ip->i_inode), |
b60623c2 SW |
848 | (ip->i_inode.i_mode & S_IFMT) == (er->er_mode & S_IFMT)); |
849 | ip->i_inode.i_mode = er->er_mode; | |
b3b94faa | 850 | } |
4bd91ba1 | 851 | ip->i_inode.i_ctime = CURRENT_TIME; |
d4e9c4c3 | 852 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
539e5d6b | 853 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa | 854 | brelse(dibh); |
a91ea69f | 855 | out: |
feaa7bba | 856 | gfs2_trans_end(GFS2_SB(&ip->i_inode)); |
b3b94faa DT |
857 | return error; |
858 | } | |
859 | ||
860 | static int ea_set_simple_alloc(struct gfs2_inode *ip, | |
861 | struct gfs2_ea_request *er, void *private) | |
862 | { | |
863 | struct ea_set *es = private; | |
864 | struct gfs2_ea_header *ea = es->es_ea; | |
865 | int error; | |
866 | ||
d4e9c4c3 | 867 | gfs2_trans_add_bh(ip->i_gl, es->es_bh, 1); |
b3b94faa DT |
868 | |
869 | if (es->ea_split) | |
870 | ea = ea_split_ea(ea); | |
871 | ||
872 | error = ea_write(ip, ea, er); | |
873 | if (error) | |
874 | return error; | |
875 | ||
876 | if (es->es_el) | |
877 | ea_set_remove_stuffed(ip, es->es_el); | |
878 | ||
879 | return 0; | |
880 | } | |
881 | ||
882 | static int ea_set_simple(struct gfs2_inode *ip, struct buffer_head *bh, | |
883 | struct gfs2_ea_header *ea, struct gfs2_ea_header *prev, | |
884 | void *private) | |
885 | { | |
886 | struct ea_set *es = private; | |
887 | unsigned int size; | |
888 | int stuffed; | |
889 | int error; | |
890 | ||
feaa7bba | 891 | stuffed = ea_calc_size(GFS2_SB(&ip->i_inode), es->es_er, &size); |
b3b94faa DT |
892 | |
893 | if (ea->ea_type == GFS2_EATYPE_UNUSED) { | |
894 | if (GFS2_EA_REC_LEN(ea) < size) | |
895 | return 0; | |
896 | if (!GFS2_EA_IS_STUFFED(ea)) { | |
897 | error = ea_remove_unstuffed(ip, bh, ea, prev, 1); | |
898 | if (error) | |
899 | return error; | |
900 | } | |
901 | es->ea_split = 0; | |
902 | } else if (GFS2_EA_REC_LEN(ea) - GFS2_EA_SIZE(ea) >= size) | |
903 | es->ea_split = 1; | |
904 | else | |
905 | return 0; | |
906 | ||
907 | if (stuffed) { | |
908 | error = ea_set_simple_noalloc(ip, bh, ea, es); | |
909 | if (error) | |
910 | return error; | |
911 | } else { | |
912 | unsigned int blks; | |
913 | ||
914 | es->es_bh = bh; | |
915 | es->es_ea = ea; | |
5c676f6d | 916 | blks = 2 + DIV_ROUND_UP(es->es_er->er_data_len, |
feaa7bba | 917 | GFS2_SB(&ip->i_inode)->sd_jbsize); |
b3b94faa DT |
918 | |
919 | error = ea_alloc_skeleton(ip, es->es_er, blks, | |
920 | ea_set_simple_alloc, es); | |
921 | if (error) | |
922 | return error; | |
923 | } | |
924 | ||
925 | return 1; | |
926 | } | |
927 | ||
928 | static int ea_set_block(struct gfs2_inode *ip, struct gfs2_ea_request *er, | |
929 | void *private) | |
930 | { | |
feaa7bba | 931 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa | 932 | struct buffer_head *indbh, *newbh; |
b44b84d7 | 933 | __be64 *eablk; |
b3b94faa DT |
934 | int error; |
935 | int mh_size = sizeof(struct gfs2_meta_header); | |
936 | ||
383f01fb | 937 | if (ip->i_diskflags & GFS2_DIF_EA_INDIRECT) { |
b44b84d7 | 938 | __be64 *end; |
b3b94faa | 939 | |
3767ac21 | 940 | error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT, |
7276b3b0 | 941 | &indbh); |
b3b94faa DT |
942 | if (error) |
943 | return error; | |
944 | ||
945 | if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) { | |
946 | error = -EIO; | |
947 | goto out; | |
948 | } | |
949 | ||
b44b84d7 | 950 | eablk = (__be64 *)(indbh->b_data + mh_size); |
b3b94faa DT |
951 | end = eablk + sdp->sd_inptrs; |
952 | ||
953 | for (; eablk < end; eablk++) | |
954 | if (!*eablk) | |
955 | break; | |
956 | ||
957 | if (eablk == end) { | |
958 | error = -ENOSPC; | |
959 | goto out; | |
960 | } | |
961 | ||
d4e9c4c3 | 962 | gfs2_trans_add_bh(ip->i_gl, indbh, 1); |
b3b94faa | 963 | } else { |
cd915493 | 964 | u64 blk; |
b45e41d7 SW |
965 | unsigned int n = 1; |
966 | blk = gfs2_alloc_block(ip, &n); | |
5731be53 | 967 | gfs2_trans_add_unrevoke(sdp, blk, 1); |
b3b94faa | 968 | indbh = gfs2_meta_new(ip->i_gl, blk); |
d4e9c4c3 | 969 | gfs2_trans_add_bh(ip->i_gl, indbh, 1); |
b3b94faa DT |
970 | gfs2_metatype_set(indbh, GFS2_METATYPE_IN, GFS2_FORMAT_IN); |
971 | gfs2_buffer_clear_tail(indbh, mh_size); | |
972 | ||
b44b84d7 | 973 | eablk = (__be64 *)(indbh->b_data + mh_size); |
3767ac21 SW |
974 | *eablk = cpu_to_be64(ip->i_eattr); |
975 | ip->i_eattr = blk; | |
383f01fb | 976 | ip->i_diskflags |= GFS2_DIF_EA_INDIRECT; |
77658aad | 977 | gfs2_add_inode_blocks(&ip->i_inode, 1); |
b3b94faa DT |
978 | |
979 | eablk++; | |
980 | } | |
981 | ||
982 | error = ea_alloc_blk(ip, &newbh); | |
983 | if (error) | |
984 | goto out; | |
985 | ||
cd915493 | 986 | *eablk = cpu_to_be64((u64)newbh->b_blocknr); |
b3b94faa DT |
987 | error = ea_write(ip, GFS2_EA_BH2FIRST(newbh), er); |
988 | brelse(newbh); | |
989 | if (error) | |
990 | goto out; | |
991 | ||
992 | if (private) | |
cca195c5 | 993 | ea_set_remove_stuffed(ip, private); |
b3b94faa | 994 | |
a91ea69f | 995 | out: |
b3b94faa | 996 | brelse(indbh); |
b3b94faa DT |
997 | return error; |
998 | } | |
999 | ||
1000 | static int ea_set_i(struct gfs2_inode *ip, struct gfs2_ea_request *er, | |
1001 | struct gfs2_ea_location *el) | |
1002 | { | |
1003 | struct ea_set es; | |
1004 | unsigned int blks = 2; | |
1005 | int error; | |
1006 | ||
1007 | memset(&es, 0, sizeof(struct ea_set)); | |
1008 | es.es_er = er; | |
1009 | es.es_el = el; | |
1010 | ||
1011 | error = ea_foreach(ip, ea_set_simple, &es); | |
1012 | if (error > 0) | |
1013 | return 0; | |
1014 | if (error) | |
1015 | return error; | |
1016 | ||
383f01fb | 1017 | if (!(ip->i_diskflags & GFS2_DIF_EA_INDIRECT)) |
b3b94faa | 1018 | blks++; |
feaa7bba SW |
1019 | if (GFS2_EAREQ_SIZE_STUFFED(er) > GFS2_SB(&ip->i_inode)->sd_jbsize) |
1020 | blks += DIV_ROUND_UP(er->er_data_len, GFS2_SB(&ip->i_inode)->sd_jbsize); | |
b3b94faa DT |
1021 | |
1022 | return ea_alloc_skeleton(ip, er, blks, ea_set_block, el); | |
1023 | } | |
1024 | ||
1025 | static int ea_set_remove_unstuffed(struct gfs2_inode *ip, | |
1026 | struct gfs2_ea_location *el) | |
1027 | { | |
1028 | if (el->el_prev && GFS2_EA2NEXT(el->el_prev) != el->el_ea) { | |
1029 | el->el_prev = GFS2_EA2NEXT(el->el_prev); | |
feaa7bba | 1030 | gfs2_assert_withdraw(GFS2_SB(&ip->i_inode), |
b3b94faa DT |
1031 | GFS2_EA2NEXT(el->el_prev) == el->el_ea); |
1032 | } | |
1033 | ||
1034 | return ea_remove_unstuffed(ip, el->el_bh, el->el_ea, el->el_prev,0); | |
1035 | } | |
1036 | ||
1037 | int gfs2_ea_set_i(struct gfs2_inode *ip, struct gfs2_ea_request *er) | |
1038 | { | |
1039 | struct gfs2_ea_location el; | |
1040 | int error; | |
1041 | ||
3767ac21 | 1042 | if (!ip->i_eattr) { |
b3b94faa DT |
1043 | if (er->er_flags & XATTR_REPLACE) |
1044 | return -ENODATA; | |
1045 | return ea_init(ip, er); | |
1046 | } | |
1047 | ||
1048 | error = gfs2_ea_find(ip, er, &el); | |
1049 | if (error) | |
1050 | return error; | |
1051 | ||
1052 | if (el.el_ea) { | |
383f01fb | 1053 | if (ip->i_diskflags & GFS2_DIF_APPENDONLY) { |
b3b94faa DT |
1054 | brelse(el.el_bh); |
1055 | return -EPERM; | |
1056 | } | |
1057 | ||
1058 | error = -EEXIST; | |
1059 | if (!(er->er_flags & XATTR_CREATE)) { | |
1060 | int unstuffed = !GFS2_EA_IS_STUFFED(el.el_ea); | |
1061 | error = ea_set_i(ip, er, &el); | |
1062 | if (!error && unstuffed) | |
1063 | ea_set_remove_unstuffed(ip, &el); | |
1064 | } | |
1065 | ||
1066 | brelse(el.el_bh); | |
1067 | } else { | |
1068 | error = -ENODATA; | |
1069 | if (!(er->er_flags & XATTR_REPLACE)) | |
1070 | error = ea_set_i(ip, er, NULL); | |
1071 | } | |
1072 | ||
1073 | return error; | |
1074 | } | |
1075 | ||
1076 | int gfs2_ea_set(struct gfs2_inode *ip, struct gfs2_ea_request *er) | |
1077 | { | |
1078 | struct gfs2_holder i_gh; | |
1079 | int error; | |
1080 | ||
cca195c5 | 1081 | if (!er->er_name_len || er->er_name_len > GFS2_EA_MAX_NAME_LEN) |
b3b94faa DT |
1082 | return -EINVAL; |
1083 | if (!er->er_data || !er->er_data_len) { | |
1084 | er->er_data = NULL; | |
1085 | er->er_data_len = 0; | |
1086 | } | |
feaa7bba | 1087 | error = ea_check_size(GFS2_SB(&ip->i_inode), er); |
b3b94faa DT |
1088 | if (error) |
1089 | return error; | |
1090 | ||
1091 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); | |
1092 | if (error) | |
1093 | return error; | |
1094 | ||
feaa7bba | 1095 | if (IS_IMMUTABLE(&ip->i_inode)) |
b3b94faa DT |
1096 | error = -EPERM; |
1097 | else | |
1098 | error = gfs2_ea_ops[er->er_type]->eo_set(ip, er); | |
1099 | ||
1100 | gfs2_glock_dq_uninit(&i_gh); | |
1101 | ||
1102 | return error; | |
1103 | } | |
1104 | ||
1105 | static int ea_remove_stuffed(struct gfs2_inode *ip, struct gfs2_ea_location *el) | |
1106 | { | |
1107 | struct gfs2_ea_header *ea = el->el_ea; | |
1108 | struct gfs2_ea_header *prev = el->el_prev; | |
1109 | struct buffer_head *dibh; | |
1110 | int error; | |
1111 | ||
feaa7bba | 1112 | error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + RES_EATTR, 0); |
b3b94faa DT |
1113 | if (error) |
1114 | return error; | |
1115 | ||
d4e9c4c3 | 1116 | gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1); |
b3b94faa DT |
1117 | |
1118 | if (prev) { | |
cd915493 | 1119 | u32 len; |
b3b94faa DT |
1120 | |
1121 | len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea); | |
1122 | prev->ea_rec_len = cpu_to_be32(len); | |
1123 | ||
1124 | if (GFS2_EA_IS_LAST(ea)) | |
1125 | prev->ea_flags |= GFS2_EAFLAG_LAST; | |
1126 | } else | |
1127 | ea->ea_type = GFS2_EATYPE_UNUSED; | |
1128 | ||
1129 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1130 | if (!error) { | |
4bd91ba1 | 1131 | ip->i_inode.i_ctime = CURRENT_TIME; |
d4e9c4c3 | 1132 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
539e5d6b | 1133 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa | 1134 | brelse(dibh); |
907b9bce | 1135 | } |
b3b94faa | 1136 | |
feaa7bba | 1137 | gfs2_trans_end(GFS2_SB(&ip->i_inode)); |
b3b94faa DT |
1138 | |
1139 | return error; | |
1140 | } | |
1141 | ||
1142 | int gfs2_ea_remove_i(struct gfs2_inode *ip, struct gfs2_ea_request *er) | |
1143 | { | |
1144 | struct gfs2_ea_location el; | |
1145 | int error; | |
1146 | ||
3767ac21 | 1147 | if (!ip->i_eattr) |
b3b94faa DT |
1148 | return -ENODATA; |
1149 | ||
1150 | error = gfs2_ea_find(ip, er, &el); | |
1151 | if (error) | |
1152 | return error; | |
1153 | if (!el.el_ea) | |
1154 | return -ENODATA; | |
1155 | ||
1156 | if (GFS2_EA_IS_STUFFED(el.el_ea)) | |
1157 | error = ea_remove_stuffed(ip, &el); | |
1158 | else | |
1159 | error = ea_remove_unstuffed(ip, el.el_bh, el.el_ea, el.el_prev, | |
1160 | 0); | |
1161 | ||
1162 | brelse(el.el_bh); | |
1163 | ||
1164 | return error; | |
1165 | } | |
1166 | ||
1167 | /** | |
1168 | * gfs2_ea_remove - sets (or creates or replaces) an extended attribute | |
1169 | * @ip: pointer to the inode of the target file | |
1170 | * @er: request information | |
1171 | * | |
1172 | * Returns: errno | |
1173 | */ | |
1174 | ||
1175 | int gfs2_ea_remove(struct gfs2_inode *ip, struct gfs2_ea_request *er) | |
1176 | { | |
1177 | struct gfs2_holder i_gh; | |
1178 | int error; | |
1179 | ||
1180 | if (!er->er_name_len || er->er_name_len > GFS2_EA_MAX_NAME_LEN) | |
1181 | return -EINVAL; | |
1182 | ||
1183 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); | |
1184 | if (error) | |
1185 | return error; | |
1186 | ||
feaa7bba | 1187 | if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode)) |
b3b94faa DT |
1188 | error = -EPERM; |
1189 | else | |
1190 | error = gfs2_ea_ops[er->er_type]->eo_remove(ip, er); | |
1191 | ||
1192 | gfs2_glock_dq_uninit(&i_gh); | |
1193 | ||
1194 | return error; | |
1195 | } | |
1196 | ||
1197 | static int ea_acl_chmod_unstuffed(struct gfs2_inode *ip, | |
1198 | struct gfs2_ea_header *ea, char *data) | |
1199 | { | |
feaa7bba | 1200 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa DT |
1201 | struct buffer_head **bh; |
1202 | unsigned int amount = GFS2_EA_DATA_LEN(ea); | |
5c676f6d | 1203 | unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize); |
b44b84d7 | 1204 | __be64 *dataptrs = GFS2_EA2DATAPTRS(ea); |
b3b94faa DT |
1205 | unsigned int x; |
1206 | int error; | |
1207 | ||
16c5f06f | 1208 | bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_NOFS); |
b3b94faa DT |
1209 | if (!bh) |
1210 | return -ENOMEM; | |
1211 | ||
1212 | error = gfs2_trans_begin(sdp, nptrs + RES_DINODE, 0); | |
1213 | if (error) | |
1214 | goto out; | |
1215 | ||
1216 | for (x = 0; x < nptrs; x++) { | |
7276b3b0 SW |
1217 | error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs), 0, |
1218 | bh + x); | |
b3b94faa DT |
1219 | if (error) { |
1220 | while (x--) | |
1221 | brelse(bh[x]); | |
1222 | goto fail; | |
1223 | } | |
1224 | dataptrs++; | |
1225 | } | |
1226 | ||
1227 | for (x = 0; x < nptrs; x++) { | |
7276b3b0 | 1228 | error = gfs2_meta_wait(sdp, bh[x]); |
b3b94faa DT |
1229 | if (error) { |
1230 | for (; x < nptrs; x++) | |
1231 | brelse(bh[x]); | |
1232 | goto fail; | |
1233 | } | |
1234 | if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) { | |
1235 | for (; x < nptrs; x++) | |
1236 | brelse(bh[x]); | |
1237 | error = -EIO; | |
1238 | goto fail; | |
1239 | } | |
1240 | ||
d4e9c4c3 | 1241 | gfs2_trans_add_bh(ip->i_gl, bh[x], 1); |
b3b94faa | 1242 | |
cca195c5 | 1243 | memcpy(bh[x]->b_data + sizeof(struct gfs2_meta_header), data, |
b3b94faa DT |
1244 | (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize); |
1245 | ||
1246 | amount -= sdp->sd_jbsize; | |
1247 | data += sdp->sd_jbsize; | |
1248 | ||
1249 | brelse(bh[x]); | |
1250 | } | |
1251 | ||
a91ea69f | 1252 | out: |
b3b94faa | 1253 | kfree(bh); |
b3b94faa DT |
1254 | return error; |
1255 | ||
a91ea69f | 1256 | fail: |
b3b94faa DT |
1257 | gfs2_trans_end(sdp); |
1258 | kfree(bh); | |
b3b94faa DT |
1259 | return error; |
1260 | } | |
1261 | ||
1262 | int gfs2_ea_acl_chmod(struct gfs2_inode *ip, struct gfs2_ea_location *el, | |
1263 | struct iattr *attr, char *data) | |
1264 | { | |
1265 | struct buffer_head *dibh; | |
1266 | int error; | |
1267 | ||
1268 | if (GFS2_EA_IS_STUFFED(el->el_ea)) { | |
feaa7bba | 1269 | error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + RES_EATTR, 0); |
b3b94faa DT |
1270 | if (error) |
1271 | return error; | |
1272 | ||
d4e9c4c3 | 1273 | gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1); |
cca195c5 | 1274 | memcpy(GFS2_EA2DATA(el->el_ea), data, |
b3b94faa DT |
1275 | GFS2_EA_DATA_LEN(el->el_ea)); |
1276 | } else | |
1277 | error = ea_acl_chmod_unstuffed(ip, el->el_ea, data); | |
1278 | ||
1279 | if (error) | |
1280 | return error; | |
1281 | ||
1282 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1283 | if (!error) { | |
feaa7bba SW |
1284 | error = inode_setattr(&ip->i_inode, attr); |
1285 | gfs2_assert_warn(GFS2_SB(&ip->i_inode), !error); | |
d4e9c4c3 | 1286 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
539e5d6b | 1287 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa DT |
1288 | brelse(dibh); |
1289 | } | |
1290 | ||
feaa7bba | 1291 | gfs2_trans_end(GFS2_SB(&ip->i_inode)); |
b3b94faa DT |
1292 | |
1293 | return error; | |
1294 | } | |
1295 | ||
1296 | static int ea_dealloc_indirect(struct gfs2_inode *ip) | |
1297 | { | |
feaa7bba | 1298 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa DT |
1299 | struct gfs2_rgrp_list rlist; |
1300 | struct buffer_head *indbh, *dibh; | |
b44b84d7 | 1301 | __be64 *eablk, *end; |
b3b94faa | 1302 | unsigned int rg_blocks = 0; |
cd915493 | 1303 | u64 bstart = 0; |
b3b94faa DT |
1304 | unsigned int blen = 0; |
1305 | unsigned int blks = 0; | |
1306 | unsigned int x; | |
1307 | int error; | |
1308 | ||
1309 | memset(&rlist, 0, sizeof(struct gfs2_rgrp_list)); | |
1310 | ||
3767ac21 | 1311 | error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT, &indbh); |
b3b94faa DT |
1312 | if (error) |
1313 | return error; | |
1314 | ||
1315 | if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) { | |
1316 | error = -EIO; | |
1317 | goto out; | |
1318 | } | |
1319 | ||
b44b84d7 | 1320 | eablk = (__be64 *)(indbh->b_data + sizeof(struct gfs2_meta_header)); |
b3b94faa DT |
1321 | end = eablk + sdp->sd_inptrs; |
1322 | ||
1323 | for (; eablk < end; eablk++) { | |
cd915493 | 1324 | u64 bn; |
b3b94faa DT |
1325 | |
1326 | if (!*eablk) | |
1327 | break; | |
1328 | bn = be64_to_cpu(*eablk); | |
1329 | ||
1330 | if (bstart + blen == bn) | |
1331 | blen++; | |
1332 | else { | |
1333 | if (bstart) | |
1334 | gfs2_rlist_add(sdp, &rlist, bstart); | |
1335 | bstart = bn; | |
1336 | blen = 1; | |
1337 | } | |
1338 | blks++; | |
1339 | } | |
1340 | if (bstart) | |
1341 | gfs2_rlist_add(sdp, &rlist, bstart); | |
1342 | else | |
1343 | goto out; | |
1344 | ||
fe6c991c | 1345 | gfs2_rlist_alloc(&rlist, LM_ST_EXCLUSIVE); |
b3b94faa DT |
1346 | |
1347 | for (x = 0; x < rlist.rl_rgrps; x++) { | |
1348 | struct gfs2_rgrpd *rgd; | |
5c676f6d | 1349 | rgd = rlist.rl_ghs[x].gh_gl->gl_object; |
bb8d8a6f | 1350 | rg_blocks += rgd->rd_length; |
b3b94faa DT |
1351 | } |
1352 | ||
1353 | error = gfs2_glock_nq_m(rlist.rl_rgrps, rlist.rl_ghs); | |
1354 | if (error) | |
1355 | goto out_rlist_free; | |
1356 | ||
cca195c5 SW |
1357 | error = gfs2_trans_begin(sdp, rg_blocks + RES_DINODE + RES_INDIRECT + |
1358 | RES_STATFS + RES_QUOTA, blks); | |
b3b94faa DT |
1359 | if (error) |
1360 | goto out_gunlock; | |
1361 | ||
d4e9c4c3 | 1362 | gfs2_trans_add_bh(ip->i_gl, indbh, 1); |
b3b94faa | 1363 | |
b44b84d7 | 1364 | eablk = (__be64 *)(indbh->b_data + sizeof(struct gfs2_meta_header)); |
b3b94faa DT |
1365 | bstart = 0; |
1366 | blen = 0; | |
1367 | ||
1368 | for (; eablk < end; eablk++) { | |
cd915493 | 1369 | u64 bn; |
b3b94faa DT |
1370 | |
1371 | if (!*eablk) | |
1372 | break; | |
1373 | bn = be64_to_cpu(*eablk); | |
1374 | ||
1375 | if (bstart + blen == bn) | |
1376 | blen++; | |
1377 | else { | |
1378 | if (bstart) | |
1379 | gfs2_free_meta(ip, bstart, blen); | |
1380 | bstart = bn; | |
1381 | blen = 1; | |
1382 | } | |
1383 | ||
1384 | *eablk = 0; | |
77658aad | 1385 | gfs2_add_inode_blocks(&ip->i_inode, -1); |
b3b94faa DT |
1386 | } |
1387 | if (bstart) | |
1388 | gfs2_free_meta(ip, bstart, blen); | |
1389 | ||
383f01fb | 1390 | ip->i_diskflags &= ~GFS2_DIF_EA_INDIRECT; |
b3b94faa DT |
1391 | |
1392 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1393 | if (!error) { | |
d4e9c4c3 | 1394 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
539e5d6b | 1395 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa DT |
1396 | brelse(dibh); |
1397 | } | |
1398 | ||
1399 | gfs2_trans_end(sdp); | |
1400 | ||
a91ea69f | 1401 | out_gunlock: |
b3b94faa | 1402 | gfs2_glock_dq_m(rlist.rl_rgrps, rlist.rl_ghs); |
a91ea69f | 1403 | out_rlist_free: |
b3b94faa | 1404 | gfs2_rlist_free(&rlist); |
a91ea69f | 1405 | out: |
b3b94faa | 1406 | brelse(indbh); |
b3b94faa DT |
1407 | return error; |
1408 | } | |
1409 | ||
1410 | static int ea_dealloc_block(struct gfs2_inode *ip) | |
1411 | { | |
feaa7bba | 1412 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
6dbd8224 | 1413 | struct gfs2_alloc *al = ip->i_alloc; |
b3b94faa DT |
1414 | struct gfs2_rgrpd *rgd; |
1415 | struct buffer_head *dibh; | |
1416 | int error; | |
1417 | ||
3767ac21 | 1418 | rgd = gfs2_blk2rgrpd(sdp, ip->i_eattr); |
b3b94faa DT |
1419 | if (!rgd) { |
1420 | gfs2_consist_inode(ip); | |
1421 | return -EIO; | |
1422 | } | |
1423 | ||
1424 | error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, | |
1425 | &al->al_rgd_gh); | |
1426 | if (error) | |
1427 | return error; | |
1428 | ||
cca195c5 SW |
1429 | error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_DINODE + RES_STATFS + |
1430 | RES_QUOTA, 1); | |
b3b94faa DT |
1431 | if (error) |
1432 | goto out_gunlock; | |
1433 | ||
3767ac21 | 1434 | gfs2_free_meta(ip, ip->i_eattr, 1); |
b3b94faa | 1435 | |
3767ac21 | 1436 | ip->i_eattr = 0; |
77658aad | 1437 | gfs2_add_inode_blocks(&ip->i_inode, -1); |
b3b94faa DT |
1438 | |
1439 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1440 | if (!error) { | |
d4e9c4c3 | 1441 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
539e5d6b | 1442 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa DT |
1443 | brelse(dibh); |
1444 | } | |
1445 | ||
1446 | gfs2_trans_end(sdp); | |
1447 | ||
a91ea69f | 1448 | out_gunlock: |
b3b94faa | 1449 | gfs2_glock_dq_uninit(&al->al_rgd_gh); |
b3b94faa DT |
1450 | return error; |
1451 | } | |
1452 | ||
1453 | /** | |
1454 | * gfs2_ea_dealloc - deallocate the extended attribute fork | |
1455 | * @ip: the inode | |
1456 | * | |
1457 | * Returns: errno | |
1458 | */ | |
1459 | ||
1460 | int gfs2_ea_dealloc(struct gfs2_inode *ip) | |
1461 | { | |
1462 | struct gfs2_alloc *al; | |
1463 | int error; | |
1464 | ||
1465 | al = gfs2_alloc_get(ip); | |
182fe5ab CG |
1466 | if (!al) |
1467 | return -ENOMEM; | |
b3b94faa DT |
1468 | |
1469 | error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE); | |
1470 | if (error) | |
1471 | goto out_alloc; | |
1472 | ||
feaa7bba | 1473 | error = gfs2_rindex_hold(GFS2_SB(&ip->i_inode), &al->al_ri_gh); |
b3b94faa DT |
1474 | if (error) |
1475 | goto out_quota; | |
1476 | ||
1477 | error = ea_foreach(ip, ea_dealloc_unstuffed, NULL); | |
1478 | if (error) | |
1479 | goto out_rindex; | |
1480 | ||
383f01fb | 1481 | if (ip->i_diskflags & GFS2_DIF_EA_INDIRECT) { |
b3b94faa DT |
1482 | error = ea_dealloc_indirect(ip); |
1483 | if (error) | |
1484 | goto out_rindex; | |
1485 | } | |
1486 | ||
1487 | error = ea_dealloc_block(ip); | |
1488 | ||
a91ea69f | 1489 | out_rindex: |
b3b94faa | 1490 | gfs2_glock_dq_uninit(&al->al_ri_gh); |
a91ea69f | 1491 | out_quota: |
b3b94faa | 1492 | gfs2_quota_unhold(ip); |
a91ea69f | 1493 | out_alloc: |
b3b94faa | 1494 | gfs2_alloc_put(ip); |
b3b94faa DT |
1495 | return error; |
1496 | } | |
1497 |