blob: 0d1c76d906aef7796b2e19bc565dde74391399ce [file] [log] [blame]
David Teiglandb3b94fa2006-01-16 16:50:04 +00001/*
2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
Steven Whitehouse3a8a9a12006-05-18 15:09:15 -04003 * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
David Teiglandb3b94fa2006-01-16 16:50:04 +00004 *
5 * This copyrighted material is made available to anyone wishing to use,
6 * modify, copy, or redistribute it subject to the terms and conditions
Steven Whitehousee9fc2aa2006-09-01 11:05:15 -04007 * of the GNU General Public License version 2.
David Teiglandb3b94fa2006-01-16 16:50:04 +00008 */
9
David Teiglandb3b94fa2006-01-16 16:50:04 +000010#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>
Steven Whitehouse5c676f62006-02-27 17:23:27 -050015#include <linux/gfs2_ondisk.h>
Fabio Massimo Di Nitto7d308592006-09-19 07:56:29 +020016#include <linux/lm_interface.h>
David Teiglandb3b94fa2006-01-16 16:50:04 +000017#include <asm/uaccess.h>
18
19#include "gfs2.h"
Steven Whitehouse5c676f62006-02-27 17:23:27 -050020#include "incore.h"
David Teiglandb3b94fa2006-01-16 16:50:04 +000021#include "acl.h"
22#include "eaops.h"
23#include "eattr.h"
24#include "glock.h"
25#include "inode.h"
26#include "meta_io.h"
27#include "quota.h"
28#include "rgrp.h"
29#include "trans.h"
Steven Whitehouse5c676f62006-02-27 17:23:27 -050030#include "util.h"
David Teiglandb3b94fa2006-01-16 16:50:04 +000031
32/**
33 * ea_calc_size - returns the acutal number of bytes the request will take up
34 * (not counting any unstuffed data blocks)
35 * @sdp:
36 * @er:
37 * @size:
38 *
39 * Returns: 1 if the EA should be stuffed
40 */
41
42static int ea_calc_size(struct gfs2_sbd *sdp, struct gfs2_ea_request *er,
43 unsigned int *size)
44{
45 *size = GFS2_EAREQ_SIZE_STUFFED(er);
46 if (*size <= sdp->sd_jbsize)
47 return 1;
48
49 *size = GFS2_EAREQ_SIZE_UNSTUFFED(sdp, er);
50
51 return 0;
52}
53
54static int ea_check_size(struct gfs2_sbd *sdp, struct gfs2_ea_request *er)
55{
56 unsigned int size;
57
58 if (er->er_data_len > GFS2_EA_MAX_DATA_LEN)
59 return -ERANGE;
60
61 ea_calc_size(sdp, er, &size);
62
63 /* This can only happen with 512 byte blocks */
64 if (size > sdp->sd_jbsize)
65 return -ERANGE;
66
67 return 0;
68}
69
Steven Whitehousecca195c2006-09-05 13:15:18 -040070typedef int (*ea_call_t) (struct gfs2_inode *ip, struct buffer_head *bh,
David Teiglandb3b94fa2006-01-16 16:50:04 +000071 struct gfs2_ea_header *ea,
Steven Whitehousecca195c2006-09-05 13:15:18 -040072 struct gfs2_ea_header *prev, void *private);
David Teiglandb3b94fa2006-01-16 16:50:04 +000073
74static int ea_foreach_i(struct gfs2_inode *ip, struct buffer_head *bh,
75 ea_call_t ea_call, void *data)
76{
77 struct gfs2_ea_header *ea, *prev = NULL;
78 int error = 0;
79
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -040080 if (gfs2_metatype_check(GFS2_SB(&ip->i_inode), bh, GFS2_METATYPE_EA))
David Teiglandb3b94fa2006-01-16 16:50:04 +000081 return -EIO;
82
83 for (ea = GFS2_EA_BH2FIRST(bh);; prev = ea, ea = GFS2_EA2NEXT(ea)) {
84 if (!GFS2_EA_REC_LEN(ea))
85 goto fail;
Steven Whitehousecca195c2006-09-05 13:15:18 -040086 if (!(bh->b_data <= (char *)ea && (char *)GFS2_EA2NEXT(ea) <=
87 bh->b_data + bh->b_size))
David Teiglandb3b94fa2006-01-16 16:50:04 +000088 goto fail;
89 if (!GFS2_EATYPE_VALID(ea->ea_type))
90 goto fail;
91
92 error = ea_call(ip, bh, ea, prev, data);
93 if (error)
94 return error;
95
96 if (GFS2_EA_IS_LAST(ea)) {
97 if ((char *)GFS2_EA2NEXT(ea) !=
98 bh->b_data + bh->b_size)
99 goto fail;
100 break;
101 }
102 }
103
104 return error;
105
Steven Whitehousea91ea692006-09-04 12:04:26 -0400106fail:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000107 gfs2_consist_inode(ip);
108 return -EIO;
109}
110
111static int ea_foreach(struct gfs2_inode *ip, ea_call_t ea_call, void *data)
112{
113 struct buffer_head *bh, *eabh;
Al Virob44b84d2006-10-14 10:46:30 -0400114 __be64 *eablk, *end;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000115 int error;
116
Steven Whitehouse3767ac22008-11-03 14:28:42 +0000117 error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT, &bh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000118 if (error)
119 return error;
120
Steven Whitehouse383f01f2008-11-04 10:05:22 +0000121 if (!(ip->i_diskflags & GFS2_DIF_EA_INDIRECT)) {
David Teiglandb3b94fa2006-01-16 16:50:04 +0000122 error = ea_foreach_i(ip, bh, ea_call, data);
123 goto out;
124 }
125
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400126 if (gfs2_metatype_check(GFS2_SB(&ip->i_inode), bh, GFS2_METATYPE_IN)) {
David Teiglandb3b94fa2006-01-16 16:50:04 +0000127 error = -EIO;
128 goto out;
129 }
130
Al Virob44b84d2006-10-14 10:46:30 -0400131 eablk = (__be64 *)(bh->b_data + sizeof(struct gfs2_meta_header));
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400132 end = eablk + GFS2_SB(&ip->i_inode)->sd_inptrs;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000133
134 for (; eablk < end; eablk++) {
Steven Whitehousecd915492006-09-04 12:49:07 -0400135 u64 bn;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000136
137 if (!*eablk)
138 break;
139 bn = be64_to_cpu(*eablk);
140
Steven Whitehouse7276b3b2006-09-21 17:05:23 -0400141 error = gfs2_meta_read(ip->i_gl, bn, DIO_WAIT, &eabh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000142 if (error)
143 break;
144 error = ea_foreach_i(ip, eabh, ea_call, data);
145 brelse(eabh);
146 if (error)
147 break;
148 }
Steven Whitehousea91ea692006-09-04 12:04:26 -0400149out:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000150 brelse(bh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000151 return error;
152}
153
154struct ea_find {
155 struct gfs2_ea_request *ef_er;
156 struct gfs2_ea_location *ef_el;
157};
158
159static int ea_find_i(struct gfs2_inode *ip, struct buffer_head *bh,
160 struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
161 void *private)
162{
163 struct ea_find *ef = private;
164 struct gfs2_ea_request *er = ef->ef_er;
165
166 if (ea->ea_type == GFS2_EATYPE_UNUSED)
167 return 0;
168
169 if (ea->ea_type == er->er_type) {
170 if (ea->ea_name_len == er->er_name_len &&
171 !memcmp(GFS2_EA2NAME(ea), er->er_name, ea->ea_name_len)) {
172 struct gfs2_ea_location *el = ef->ef_el;
173 get_bh(bh);
174 el->el_bh = bh;
175 el->el_ea = ea;
176 el->el_prev = prev;
177 return 1;
178 }
179 }
180
David Teiglandb3b94fa2006-01-16 16:50:04 +0000181 return 0;
182}
183
184int gfs2_ea_find(struct gfs2_inode *ip, struct gfs2_ea_request *er,
185 struct gfs2_ea_location *el)
186{
187 struct ea_find ef;
188 int error;
189
190 ef.ef_er = er;
191 ef.ef_el = el;
192
193 memset(el, 0, sizeof(struct gfs2_ea_location));
194
195 error = ea_foreach(ip, ea_find_i, &ef);
196 if (error > 0)
197 return 0;
198
199 return error;
200}
201
202/**
203 * ea_dealloc_unstuffed -
204 * @ip:
205 * @bh:
206 * @ea:
207 * @prev:
208 * @private:
209 *
210 * Take advantage of the fact that all unstuffed blocks are
211 * allocated from the same RG. But watch, this may not always
212 * be true.
213 *
214 * Returns: errno
215 */
216
217static int ea_dealloc_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh,
218 struct gfs2_ea_header *ea,
219 struct gfs2_ea_header *prev, void *private)
220{
221 int *leave = private;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400222 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000223 struct gfs2_rgrpd *rgd;
224 struct gfs2_holder rg_gh;
225 struct buffer_head *dibh;
Al Virob44b84d2006-10-14 10:46:30 -0400226 __be64 *dataptrs;
227 u64 bn = 0;
Steven Whitehousecd915492006-09-04 12:49:07 -0400228 u64 bstart = 0;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000229 unsigned int blen = 0;
230 unsigned int blks = 0;
231 unsigned int x;
232 int error;
233
234 if (GFS2_EA_IS_STUFFED(ea))
235 return 0;
236
237 dataptrs = GFS2_EA2DATAPTRS(ea);
Steven Whitehousecca195c2006-09-05 13:15:18 -0400238 for (x = 0; x < ea->ea_num_ptrs; x++, dataptrs++) {
David Teiglandb3b94fa2006-01-16 16:50:04 +0000239 if (*dataptrs) {
240 blks++;
241 bn = be64_to_cpu(*dataptrs);
242 }
Steven Whitehousecca195c2006-09-05 13:15:18 -0400243 }
David Teiglandb3b94fa2006-01-16 16:50:04 +0000244 if (!blks)
245 return 0;
246
247 rgd = gfs2_blk2rgrpd(sdp, bn);
248 if (!rgd) {
249 gfs2_consist_inode(ip);
250 return -EIO;
251 }
252
253 error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &rg_gh);
254 if (error)
255 return error;
256
Steven Whitehousebb8d8a62007-06-01 14:11:58 +0100257 error = gfs2_trans_begin(sdp, rgd->rd_length + RES_DINODE +
Steven Whitehousecca195c2006-09-05 13:15:18 -0400258 RES_EATTR + RES_STATFS + RES_QUOTA, blks);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000259 if (error)
260 goto out_gunlock;
261
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +0000262 gfs2_trans_add_bh(ip->i_gl, bh, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000263
264 dataptrs = GFS2_EA2DATAPTRS(ea);
265 for (x = 0; x < ea->ea_num_ptrs; x++, dataptrs++) {
266 if (!*dataptrs)
267 break;
268 bn = be64_to_cpu(*dataptrs);
269
270 if (bstart + blen == bn)
271 blen++;
272 else {
273 if (bstart)
274 gfs2_free_meta(ip, bstart, blen);
275 bstart = bn;
276 blen = 1;
277 }
278
279 *dataptrs = 0;
Steven Whitehouse77658aa2008-02-12 14:17:27 +0000280 gfs2_add_inode_blocks(&ip->i_inode, -1);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000281 }
282 if (bstart)
283 gfs2_free_meta(ip, bstart, blen);
284
285 if (prev && !leave) {
Steven Whitehousecd915492006-09-04 12:49:07 -0400286 u32 len;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000287
288 len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
289 prev->ea_rec_len = cpu_to_be32(len);
290
291 if (GFS2_EA_IS_LAST(ea))
292 prev->ea_flags |= GFS2_EAFLAG_LAST;
293 } else {
294 ea->ea_type = GFS2_EATYPE_UNUSED;
295 ea->ea_num_ptrs = 0;
296 }
297
298 error = gfs2_meta_inode_buffer(ip, &dibh);
299 if (!error) {
Steven Whitehouse4bd91ba2007-06-05 09:39:18 +0100300 ip->i_inode.i_ctime = CURRENT_TIME;
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +0000301 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
Steven Whitehouse539e5d62006-10-31 15:07:05 -0500302 gfs2_dinode_out(ip, dibh->b_data);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000303 brelse(dibh);
304 }
305
306 gfs2_trans_end(sdp);
307
Steven Whitehousea91ea692006-09-04 12:04:26 -0400308out_gunlock:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000309 gfs2_glock_dq_uninit(&rg_gh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000310 return error;
311}
312
313static int ea_remove_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh,
314 struct gfs2_ea_header *ea,
315 struct gfs2_ea_header *prev, int leave)
316{
317 struct gfs2_alloc *al;
318 int error;
319
320 al = gfs2_alloc_get(ip);
Cyrill Gorcunov182fe5a2008-03-03 21:54:21 +0300321 if (!al)
322 return -ENOMEM;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000323
324 error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
325 if (error)
326 goto out_alloc;
327
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400328 error = gfs2_rindex_hold(GFS2_SB(&ip->i_inode), &al->al_ri_gh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000329 if (error)
330 goto out_quota;
331
Steven Whitehousecca195c2006-09-05 13:15:18 -0400332 error = ea_dealloc_unstuffed(ip, bh, ea, prev, (leave) ? &error : NULL);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000333
334 gfs2_glock_dq_uninit(&al->al_ri_gh);
335
Steven Whitehousea91ea692006-09-04 12:04:26 -0400336out_quota:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000337 gfs2_quota_unhold(ip);
Steven Whitehousea91ea692006-09-04 12:04:26 -0400338out_alloc:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000339 gfs2_alloc_put(ip);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000340 return error;
341}
342
David Teiglandb3b94fa2006-01-16 16:50:04 +0000343struct ea_list {
344 struct gfs2_ea_request *ei_er;
345 unsigned int ei_size;
346};
347
348static int ea_list_i(struct gfs2_inode *ip, struct buffer_head *bh,
349 struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
350 void *private)
351{
352 struct ea_list *ei = private;
353 struct gfs2_ea_request *er = ei->ei_er;
Ryan O'Hara639b6d72006-05-22 10:08:35 -0400354 unsigned int ea_size = gfs2_ea_strlen(ea);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000355
356 if (ea->ea_type == GFS2_EATYPE_UNUSED)
357 return 0;
358
359 if (er->er_data_len) {
Steven Whitehouse01eb7c02006-06-06 17:31:30 -0400360 char *prefix = NULL;
361 unsigned int l = 0;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000362 char c = 0;
363
364 if (ei->ei_size + ea_size > er->er_data_len)
365 return -ERANGE;
366
Ryan O'Hara639b6d72006-05-22 10:08:35 -0400367 switch (ea->ea_type) {
368 case GFS2_EATYPE_USR:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000369 prefix = "user.";
370 l = 5;
Ryan O'Hara639b6d72006-05-22 10:08:35 -0400371 break;
372 case GFS2_EATYPE_SYS:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000373 prefix = "system.";
374 l = 7;
Ryan O'Hara639b6d72006-05-22 10:08:35 -0400375 break;
376 case GFS2_EATYPE_SECURITY:
377 prefix = "security.";
378 l = 9;
379 break;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000380 }
381
Steven Whitehouse01eb7c02006-06-06 17:31:30 -0400382 BUG_ON(l == 0);
383
Steven Whitehouse90cdd202006-05-22 10:36:25 -0400384 memcpy(er->er_data + ei->ei_size, prefix, l);
385 memcpy(er->er_data + ei->ei_size + l, GFS2_EA2NAME(ea),
David Teiglandb3b94fa2006-01-16 16:50:04 +0000386 ea->ea_name_len);
Steven Whitehouse90cdd202006-05-22 10:36:25 -0400387 memcpy(er->er_data + ei->ei_size + ea_size - 1, &c, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000388 }
389
390 ei->ei_size += ea_size;
391
392 return 0;
393}
394
395/**
396 * gfs2_ea_list -
397 * @ip:
398 * @er:
399 *
400 * Returns: actual size of data on success, -errno on error
401 */
402
403int gfs2_ea_list(struct gfs2_inode *ip, struct gfs2_ea_request *er)
404{
405 struct gfs2_holder i_gh;
406 int error;
407
408 if (!er->er_data || !er->er_data_len) {
409 er->er_data = NULL;
410 er->er_data_len = 0;
411 }
412
Steven Whitehousecca195c2006-09-05 13:15:18 -0400413 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000414 if (error)
415 return error;
416
Steven Whitehouse3767ac22008-11-03 14:28:42 +0000417 if (ip->i_eattr) {
David Teiglandb3b94fa2006-01-16 16:50:04 +0000418 struct ea_list ei = { .ei_er = er, .ei_size = 0 };
419
420 error = ea_foreach(ip, ea_list_i, &ei);
421 if (!error)
422 error = ei.ei_size;
423 }
424
425 gfs2_glock_dq_uninit(&i_gh);
426
427 return error;
428}
429
430/**
431 * ea_get_unstuffed - actually copies the unstuffed data into the
432 * request buffer
Steven Whitehousecca195c2006-09-05 13:15:18 -0400433 * @ip: The GFS2 inode
434 * @ea: The extended attribute header structure
435 * @data: The data to be copied
David Teiglandb3b94fa2006-01-16 16:50:04 +0000436 *
437 * Returns: errno
438 */
439
440static int ea_get_unstuffed(struct gfs2_inode *ip, struct gfs2_ea_header *ea,
441 char *data)
442{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400443 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000444 struct buffer_head **bh;
445 unsigned int amount = GFS2_EA_DATA_LEN(ea);
Steven Whitehouse5c676f62006-02-27 17:23:27 -0500446 unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize);
Al Virob44b84d2006-10-14 10:46:30 -0400447 __be64 *dataptrs = GFS2_EA2DATAPTRS(ea);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000448 unsigned int x;
449 int error = 0;
450
Josef Bacik16c5f062008-04-09 09:33:41 -0400451 bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_NOFS);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000452 if (!bh)
453 return -ENOMEM;
454
455 for (x = 0; x < nptrs; x++) {
Steven Whitehouse7276b3b2006-09-21 17:05:23 -0400456 error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs), 0,
457 bh + x);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000458 if (error) {
459 while (x--)
460 brelse(bh[x]);
461 goto out;
462 }
463 dataptrs++;
464 }
465
466 for (x = 0; x < nptrs; x++) {
Steven Whitehouse7276b3b2006-09-21 17:05:23 -0400467 error = gfs2_meta_wait(sdp, bh[x]);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000468 if (error) {
469 for (; x < nptrs; x++)
470 brelse(bh[x]);
471 goto out;
472 }
473 if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) {
474 for (; x < nptrs; x++)
475 brelse(bh[x]);
476 error = -EIO;
477 goto out;
478 }
479
Steven Whitehousecca195c2006-09-05 13:15:18 -0400480 memcpy(data, bh[x]->b_data + sizeof(struct gfs2_meta_header),
David Teiglandb3b94fa2006-01-16 16:50:04 +0000481 (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize);
482
483 amount -= sdp->sd_jbsize;
484 data += sdp->sd_jbsize;
485
486 brelse(bh[x]);
487 }
488
Steven Whitehousea91ea692006-09-04 12:04:26 -0400489out:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000490 kfree(bh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000491 return error;
492}
493
494int gfs2_ea_get_copy(struct gfs2_inode *ip, struct gfs2_ea_location *el,
495 char *data)
496{
497 if (GFS2_EA_IS_STUFFED(el->el_ea)) {
Steven Whitehousecca195c2006-09-05 13:15:18 -0400498 memcpy(data, GFS2_EA2DATA(el->el_ea), GFS2_EA_DATA_LEN(el->el_ea));
David Teiglandb3b94fa2006-01-16 16:50:04 +0000499 return 0;
500 } else
501 return ea_get_unstuffed(ip, el->el_ea, data);
502}
503
504/**
505 * gfs2_ea_get_i -
Steven Whitehousecca195c2006-09-05 13:15:18 -0400506 * @ip: The GFS2 inode
507 * @er: The request structure
David Teiglandb3b94fa2006-01-16 16:50:04 +0000508 *
509 * Returns: actual size of data on success, -errno on error
510 */
511
512int gfs2_ea_get_i(struct gfs2_inode *ip, struct gfs2_ea_request *er)
513{
514 struct gfs2_ea_location el;
515 int error;
516
Steven Whitehouse3767ac22008-11-03 14:28:42 +0000517 if (!ip->i_eattr)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000518 return -ENODATA;
519
520 error = gfs2_ea_find(ip, er, &el);
521 if (error)
522 return error;
523 if (!el.el_ea)
524 return -ENODATA;
525
526 if (er->er_data_len) {
527 if (GFS2_EA_DATA_LEN(el.el_ea) > er->er_data_len)
528 error = -ERANGE;
529 else
530 error = gfs2_ea_get_copy(ip, &el, er->er_data);
531 }
532 if (!error)
533 error = GFS2_EA_DATA_LEN(el.el_ea);
534
535 brelse(el.el_bh);
536
537 return error;
538}
539
540/**
541 * gfs2_ea_get -
Steven Whitehousecca195c2006-09-05 13:15:18 -0400542 * @ip: The GFS2 inode
543 * @er: The request structure
David Teiglandb3b94fa2006-01-16 16:50:04 +0000544 *
545 * Returns: actual size of data on success, -errno on error
546 */
547
548int gfs2_ea_get(struct gfs2_inode *ip, struct gfs2_ea_request *er)
549{
550 struct gfs2_holder i_gh;
551 int error;
552
553 if (!er->er_name_len ||
554 er->er_name_len > GFS2_EA_MAX_NAME_LEN)
555 return -EINVAL;
556 if (!er->er_data || !er->er_data_len) {
557 er->er_data = NULL;
558 er->er_data_len = 0;
559 }
560
Steven Whitehousecca195c2006-09-05 13:15:18 -0400561 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000562 if (error)
563 return error;
564
565 error = gfs2_ea_ops[er->er_type]->eo_get(ip, er);
566
567 gfs2_glock_dq_uninit(&i_gh);
568
569 return error;
570}
571
572/**
573 * ea_alloc_blk - allocates a new block for extended attributes.
574 * @ip: A pointer to the inode that's getting extended attributes
Steven Whitehousecca195c2006-09-05 13:15:18 -0400575 * @bhp: Pointer to pointer to a struct buffer_head
David Teiglandb3b94fa2006-01-16 16:50:04 +0000576 *
577 * Returns: errno
578 */
579
580static int ea_alloc_blk(struct gfs2_inode *ip, struct buffer_head **bhp)
581{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400582 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000583 struct gfs2_ea_header *ea;
Steven Whitehouseb45e41d2008-02-06 10:11:15 +0000584 unsigned int n = 1;
Steven Whitehousecd915492006-09-04 12:49:07 -0400585 u64 block;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000586
Steven Whitehouseb45e41d2008-02-06 10:11:15 +0000587 block = gfs2_alloc_block(ip, &n);
Steven Whitehouse5731be52008-02-01 13:16:55 +0000588 gfs2_trans_add_unrevoke(sdp, block, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000589 *bhp = gfs2_meta_new(ip->i_gl, block);
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +0000590 gfs2_trans_add_bh(ip->i_gl, *bhp, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000591 gfs2_metatype_set(*bhp, GFS2_METATYPE_EA, GFS2_FORMAT_EA);
592 gfs2_buffer_clear_tail(*bhp, sizeof(struct gfs2_meta_header));
593
594 ea = GFS2_EA_BH2FIRST(*bhp);
595 ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize);
596 ea->ea_type = GFS2_EATYPE_UNUSED;
597 ea->ea_flags = GFS2_EAFLAG_LAST;
598 ea->ea_num_ptrs = 0;
599
Steven Whitehouse77658aa2008-02-12 14:17:27 +0000600 gfs2_add_inode_blocks(&ip->i_inode, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000601
602 return 0;
603}
604
605/**
606 * ea_write - writes the request info to an ea, creating new blocks if
607 * necessary
Steven Whitehousecca195c2006-09-05 13:15:18 -0400608 * @ip: inode that is being modified
609 * @ea: the location of the new ea in a block
David Teiglandb3b94fa2006-01-16 16:50:04 +0000610 * @er: the write request
611 *
612 * Note: does not update ea_rec_len or the GFS2_EAFLAG_LAST bin of ea_flags
613 *
614 * returns : errno
615 */
616
617static int ea_write(struct gfs2_inode *ip, struct gfs2_ea_header *ea,
618 struct gfs2_ea_request *er)
619{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400620 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000621
622 ea->ea_data_len = cpu_to_be32(er->er_data_len);
623 ea->ea_name_len = er->er_name_len;
624 ea->ea_type = er->er_type;
625 ea->__pad = 0;
626
627 memcpy(GFS2_EA2NAME(ea), er->er_name, er->er_name_len);
628
629 if (GFS2_EAREQ_SIZE_STUFFED(er) <= sdp->sd_jbsize) {
630 ea->ea_num_ptrs = 0;
631 memcpy(GFS2_EA2DATA(ea), er->er_data, er->er_data_len);
632 } else {
Al Virob44b84d2006-10-14 10:46:30 -0400633 __be64 *dataptr = GFS2_EA2DATAPTRS(ea);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000634 const char *data = er->er_data;
635 unsigned int data_len = er->er_data_len;
636 unsigned int copy;
637 unsigned int x;
638
Steven Whitehouse5c676f62006-02-27 17:23:27 -0500639 ea->ea_num_ptrs = DIV_ROUND_UP(er->er_data_len, sdp->sd_jbsize);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000640 for (x = 0; x < ea->ea_num_ptrs; x++) {
641 struct buffer_head *bh;
Steven Whitehousecd915492006-09-04 12:49:07 -0400642 u64 block;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000643 int mh_size = sizeof(struct gfs2_meta_header);
Steven Whitehouseb45e41d2008-02-06 10:11:15 +0000644 unsigned int n = 1;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000645
Steven Whitehouseb45e41d2008-02-06 10:11:15 +0000646 block = gfs2_alloc_block(ip, &n);
Steven Whitehouse5731be52008-02-01 13:16:55 +0000647 gfs2_trans_add_unrevoke(sdp, block, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000648 bh = gfs2_meta_new(ip->i_gl, block);
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +0000649 gfs2_trans_add_bh(ip->i_gl, bh, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000650 gfs2_metatype_set(bh, GFS2_METATYPE_ED, GFS2_FORMAT_ED);
651
Steven Whitehouse77658aa2008-02-12 14:17:27 +0000652 gfs2_add_inode_blocks(&ip->i_inode, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000653
Steven Whitehousecca195c2006-09-05 13:15:18 -0400654 copy = data_len > sdp->sd_jbsize ? sdp->sd_jbsize :
655 data_len;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000656 memcpy(bh->b_data + mh_size, data, copy);
657 if (copy < sdp->sd_jbsize)
658 memset(bh->b_data + mh_size + copy, 0,
659 sdp->sd_jbsize - copy);
660
Steven Whitehousecca195c2006-09-05 13:15:18 -0400661 *dataptr++ = cpu_to_be64(bh->b_blocknr);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000662 data += copy;
663 data_len -= copy;
664
665 brelse(bh);
666 }
667
668 gfs2_assert_withdraw(sdp, !data_len);
669 }
670
671 return 0;
672}
673
674typedef int (*ea_skeleton_call_t) (struct gfs2_inode *ip,
Steven Whitehousecca195c2006-09-05 13:15:18 -0400675 struct gfs2_ea_request *er, void *private);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000676
677static int ea_alloc_skeleton(struct gfs2_inode *ip, struct gfs2_ea_request *er,
678 unsigned int blks,
Steven Whitehousecca195c2006-09-05 13:15:18 -0400679 ea_skeleton_call_t skeleton_call, void *private)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000680{
681 struct gfs2_alloc *al;
682 struct buffer_head *dibh;
683 int error;
684
685 al = gfs2_alloc_get(ip);
Cyrill Gorcunov182fe5a2008-03-03 21:54:21 +0300686 if (!al)
687 return -ENOMEM;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000688
Steven Whitehoused82661d2008-03-10 15:34:50 +0000689 error = gfs2_quota_lock_check(ip);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000690 if (error)
691 goto out;
692
David Teiglandb3b94fa2006-01-16 16:50:04 +0000693 al->al_requested = blks;
694
695 error = gfs2_inplace_reserve(ip);
696 if (error)
697 goto out_gunlock_q;
698
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400699 error = gfs2_trans_begin(GFS2_SB(&ip->i_inode),
Steven Whitehousebb8d8a62007-06-01 14:11:58 +0100700 blks + al->al_rgd->rd_length +
David Teiglandb3b94fa2006-01-16 16:50:04 +0000701 RES_DINODE + RES_STATFS + RES_QUOTA, 0);
702 if (error)
703 goto out_ipres;
704
705 error = skeleton_call(ip, er, private);
706 if (error)
707 goto out_end_trans;
708
709 error = gfs2_meta_inode_buffer(ip, &dibh);
710 if (!error) {
711 if (er->er_flags & GFS2_ERF_MODE) {
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400712 gfs2_assert_withdraw(GFS2_SB(&ip->i_inode),
Steven Whitehouseb60623c2006-11-01 12:22:46 -0500713 (ip->i_inode.i_mode & S_IFMT) ==
David Teiglandb3b94fa2006-01-16 16:50:04 +0000714 (er->er_mode & S_IFMT));
Steven Whitehouseb60623c2006-11-01 12:22:46 -0500715 ip->i_inode.i_mode = er->er_mode;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000716 }
Steven Whitehouse4bd91ba2007-06-05 09:39:18 +0100717 ip->i_inode.i_ctime = CURRENT_TIME;
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +0000718 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
Steven Whitehouse539e5d62006-10-31 15:07:05 -0500719 gfs2_dinode_out(ip, dibh->b_data);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000720 brelse(dibh);
721 }
722
Steven Whitehousea91ea692006-09-04 12:04:26 -0400723out_end_trans:
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400724 gfs2_trans_end(GFS2_SB(&ip->i_inode));
Steven Whitehousea91ea692006-09-04 12:04:26 -0400725out_ipres:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000726 gfs2_inplace_release(ip);
Steven Whitehousea91ea692006-09-04 12:04:26 -0400727out_gunlock_q:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000728 gfs2_quota_unlock(ip);
Steven Whitehousea91ea692006-09-04 12:04:26 -0400729out:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000730 gfs2_alloc_put(ip);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000731 return error;
732}
733
734static int ea_init_i(struct gfs2_inode *ip, struct gfs2_ea_request *er,
735 void *private)
736{
737 struct buffer_head *bh;
738 int error;
739
740 error = ea_alloc_blk(ip, &bh);
741 if (error)
742 return error;
743
Steven Whitehouse3767ac22008-11-03 14:28:42 +0000744 ip->i_eattr = bh->b_blocknr;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000745 error = ea_write(ip, GFS2_EA_BH2FIRST(bh), er);
746
747 brelse(bh);
748
749 return error;
750}
751
752/**
753 * ea_init - initializes a new eattr block
754 * @ip:
755 * @er:
756 *
757 * Returns: errno
758 */
759
760static int ea_init(struct gfs2_inode *ip, struct gfs2_ea_request *er)
761{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400762 unsigned int jbsize = GFS2_SB(&ip->i_inode)->sd_jbsize;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000763 unsigned int blks = 1;
764
765 if (GFS2_EAREQ_SIZE_STUFFED(er) > jbsize)
Steven Whitehouse5c676f62006-02-27 17:23:27 -0500766 blks += DIV_ROUND_UP(er->er_data_len, jbsize);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000767
768 return ea_alloc_skeleton(ip, er, blks, ea_init_i, NULL);
769}
770
771static struct gfs2_ea_header *ea_split_ea(struct gfs2_ea_header *ea)
772{
Steven Whitehousecd915492006-09-04 12:49:07 -0400773 u32 ea_size = GFS2_EA_SIZE(ea);
Steven Whitehouse568f4c92006-02-27 12:00:42 -0500774 struct gfs2_ea_header *new = (struct gfs2_ea_header *)((char *)ea +
775 ea_size);
Steven Whitehousecd915492006-09-04 12:49:07 -0400776 u32 new_size = GFS2_EA_REC_LEN(ea) - ea_size;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000777 int last = ea->ea_flags & GFS2_EAFLAG_LAST;
778
779 ea->ea_rec_len = cpu_to_be32(ea_size);
780 ea->ea_flags ^= last;
781
782 new->ea_rec_len = cpu_to_be32(new_size);
783 new->ea_flags = last;
784
785 return new;
786}
787
788static void ea_set_remove_stuffed(struct gfs2_inode *ip,
789 struct gfs2_ea_location *el)
790{
791 struct gfs2_ea_header *ea = el->el_ea;
792 struct gfs2_ea_header *prev = el->el_prev;
Steven Whitehousecd915492006-09-04 12:49:07 -0400793 u32 len;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000794
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +0000795 gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000796
797 if (!prev || !GFS2_EA_IS_STUFFED(ea)) {
798 ea->ea_type = GFS2_EATYPE_UNUSED;
799 return;
800 } else if (GFS2_EA2NEXT(prev) != ea) {
801 prev = GFS2_EA2NEXT(prev);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400802 gfs2_assert_withdraw(GFS2_SB(&ip->i_inode), GFS2_EA2NEXT(prev) == ea);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000803 }
804
805 len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
806 prev->ea_rec_len = cpu_to_be32(len);
807
808 if (GFS2_EA_IS_LAST(ea))
809 prev->ea_flags |= GFS2_EAFLAG_LAST;
810}
811
812struct ea_set {
813 int ea_split;
814
815 struct gfs2_ea_request *es_er;
816 struct gfs2_ea_location *es_el;
817
818 struct buffer_head *es_bh;
819 struct gfs2_ea_header *es_ea;
820};
821
822static int ea_set_simple_noalloc(struct gfs2_inode *ip, struct buffer_head *bh,
823 struct gfs2_ea_header *ea, struct ea_set *es)
824{
825 struct gfs2_ea_request *er = es->es_er;
826 struct buffer_head *dibh;
827 int error;
828
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400829 error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + 2 * RES_EATTR, 0);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000830 if (error)
831 return error;
832
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +0000833 gfs2_trans_add_bh(ip->i_gl, bh, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000834
835 if (es->ea_split)
836 ea = ea_split_ea(ea);
837
838 ea_write(ip, ea, er);
839
840 if (es->es_el)
841 ea_set_remove_stuffed(ip, es->es_el);
842
843 error = gfs2_meta_inode_buffer(ip, &dibh);
844 if (error)
845 goto out;
846
847 if (er->er_flags & GFS2_ERF_MODE) {
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400848 gfs2_assert_withdraw(GFS2_SB(&ip->i_inode),
Steven Whitehouseb60623c2006-11-01 12:22:46 -0500849 (ip->i_inode.i_mode & S_IFMT) == (er->er_mode & S_IFMT));
850 ip->i_inode.i_mode = er->er_mode;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000851 }
Steven Whitehouse4bd91ba2007-06-05 09:39:18 +0100852 ip->i_inode.i_ctime = CURRENT_TIME;
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +0000853 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
Steven Whitehouse539e5d62006-10-31 15:07:05 -0500854 gfs2_dinode_out(ip, dibh->b_data);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000855 brelse(dibh);
Steven Whitehousea91ea692006-09-04 12:04:26 -0400856out:
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400857 gfs2_trans_end(GFS2_SB(&ip->i_inode));
David Teiglandb3b94fa2006-01-16 16:50:04 +0000858 return error;
859}
860
861static int ea_set_simple_alloc(struct gfs2_inode *ip,
862 struct gfs2_ea_request *er, void *private)
863{
864 struct ea_set *es = private;
865 struct gfs2_ea_header *ea = es->es_ea;
866 int error;
867
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +0000868 gfs2_trans_add_bh(ip->i_gl, es->es_bh, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000869
870 if (es->ea_split)
871 ea = ea_split_ea(ea);
872
873 error = ea_write(ip, ea, er);
874 if (error)
875 return error;
876
877 if (es->es_el)
878 ea_set_remove_stuffed(ip, es->es_el);
879
880 return 0;
881}
882
883static int ea_set_simple(struct gfs2_inode *ip, struct buffer_head *bh,
884 struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
885 void *private)
886{
887 struct ea_set *es = private;
888 unsigned int size;
889 int stuffed;
890 int error;
891
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400892 stuffed = ea_calc_size(GFS2_SB(&ip->i_inode), es->es_er, &size);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000893
894 if (ea->ea_type == GFS2_EATYPE_UNUSED) {
895 if (GFS2_EA_REC_LEN(ea) < size)
896 return 0;
897 if (!GFS2_EA_IS_STUFFED(ea)) {
898 error = ea_remove_unstuffed(ip, bh, ea, prev, 1);
899 if (error)
900 return error;
901 }
902 es->ea_split = 0;
903 } else if (GFS2_EA_REC_LEN(ea) - GFS2_EA_SIZE(ea) >= size)
904 es->ea_split = 1;
905 else
906 return 0;
907
908 if (stuffed) {
909 error = ea_set_simple_noalloc(ip, bh, ea, es);
910 if (error)
911 return error;
912 } else {
913 unsigned int blks;
914
915 es->es_bh = bh;
916 es->es_ea = ea;
Steven Whitehouse5c676f62006-02-27 17:23:27 -0500917 blks = 2 + DIV_ROUND_UP(es->es_er->er_data_len,
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400918 GFS2_SB(&ip->i_inode)->sd_jbsize);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000919
920 error = ea_alloc_skeleton(ip, es->es_er, blks,
921 ea_set_simple_alloc, es);
922 if (error)
923 return error;
924 }
925
926 return 1;
927}
928
929static int ea_set_block(struct gfs2_inode *ip, struct gfs2_ea_request *er,
930 void *private)
931{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400932 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000933 struct buffer_head *indbh, *newbh;
Al Virob44b84d2006-10-14 10:46:30 -0400934 __be64 *eablk;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000935 int error;
936 int mh_size = sizeof(struct gfs2_meta_header);
937
Steven Whitehouse383f01f2008-11-04 10:05:22 +0000938 if (ip->i_diskflags & GFS2_DIF_EA_INDIRECT) {
Al Virob44b84d2006-10-14 10:46:30 -0400939 __be64 *end;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000940
Steven Whitehouse3767ac22008-11-03 14:28:42 +0000941 error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT,
Steven Whitehouse7276b3b2006-09-21 17:05:23 -0400942 &indbh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000943 if (error)
944 return error;
945
946 if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) {
947 error = -EIO;
948 goto out;
949 }
950
Al Virob44b84d2006-10-14 10:46:30 -0400951 eablk = (__be64 *)(indbh->b_data + mh_size);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000952 end = eablk + sdp->sd_inptrs;
953
954 for (; eablk < end; eablk++)
955 if (!*eablk)
956 break;
957
958 if (eablk == end) {
959 error = -ENOSPC;
960 goto out;
961 }
962
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +0000963 gfs2_trans_add_bh(ip->i_gl, indbh, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000964 } else {
Steven Whitehousecd915492006-09-04 12:49:07 -0400965 u64 blk;
Steven Whitehouseb45e41d2008-02-06 10:11:15 +0000966 unsigned int n = 1;
967 blk = gfs2_alloc_block(ip, &n);
Steven Whitehouse5731be52008-02-01 13:16:55 +0000968 gfs2_trans_add_unrevoke(sdp, blk, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000969 indbh = gfs2_meta_new(ip->i_gl, blk);
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +0000970 gfs2_trans_add_bh(ip->i_gl, indbh, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000971 gfs2_metatype_set(indbh, GFS2_METATYPE_IN, GFS2_FORMAT_IN);
972 gfs2_buffer_clear_tail(indbh, mh_size);
973
Al Virob44b84d2006-10-14 10:46:30 -0400974 eablk = (__be64 *)(indbh->b_data + mh_size);
Steven Whitehouse3767ac22008-11-03 14:28:42 +0000975 *eablk = cpu_to_be64(ip->i_eattr);
976 ip->i_eattr = blk;
Steven Whitehouse383f01f2008-11-04 10:05:22 +0000977 ip->i_diskflags |= GFS2_DIF_EA_INDIRECT;
Steven Whitehouse77658aa2008-02-12 14:17:27 +0000978 gfs2_add_inode_blocks(&ip->i_inode, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000979
980 eablk++;
981 }
982
983 error = ea_alloc_blk(ip, &newbh);
984 if (error)
985 goto out;
986
Steven Whitehousecd915492006-09-04 12:49:07 -0400987 *eablk = cpu_to_be64((u64)newbh->b_blocknr);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000988 error = ea_write(ip, GFS2_EA_BH2FIRST(newbh), er);
989 brelse(newbh);
990 if (error)
991 goto out;
992
993 if (private)
Steven Whitehousecca195c2006-09-05 13:15:18 -0400994 ea_set_remove_stuffed(ip, private);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000995
Steven Whitehousea91ea692006-09-04 12:04:26 -0400996out:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000997 brelse(indbh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000998 return error;
999}
1000
1001static int ea_set_i(struct gfs2_inode *ip, struct gfs2_ea_request *er,
1002 struct gfs2_ea_location *el)
1003{
1004 struct ea_set es;
1005 unsigned int blks = 2;
1006 int error;
1007
1008 memset(&es, 0, sizeof(struct ea_set));
1009 es.es_er = er;
1010 es.es_el = el;
1011
1012 error = ea_foreach(ip, ea_set_simple, &es);
1013 if (error > 0)
1014 return 0;
1015 if (error)
1016 return error;
1017
Steven Whitehouse383f01f2008-11-04 10:05:22 +00001018 if (!(ip->i_diskflags & GFS2_DIF_EA_INDIRECT))
David Teiglandb3b94fa2006-01-16 16:50:04 +00001019 blks++;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001020 if (GFS2_EAREQ_SIZE_STUFFED(er) > GFS2_SB(&ip->i_inode)->sd_jbsize)
1021 blks += DIV_ROUND_UP(er->er_data_len, GFS2_SB(&ip->i_inode)->sd_jbsize);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001022
1023 return ea_alloc_skeleton(ip, er, blks, ea_set_block, el);
1024}
1025
1026static int ea_set_remove_unstuffed(struct gfs2_inode *ip,
1027 struct gfs2_ea_location *el)
1028{
1029 if (el->el_prev && GFS2_EA2NEXT(el->el_prev) != el->el_ea) {
1030 el->el_prev = GFS2_EA2NEXT(el->el_prev);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001031 gfs2_assert_withdraw(GFS2_SB(&ip->i_inode),
David Teiglandb3b94fa2006-01-16 16:50:04 +00001032 GFS2_EA2NEXT(el->el_prev) == el->el_ea);
1033 }
1034
1035 return ea_remove_unstuffed(ip, el->el_bh, el->el_ea, el->el_prev,0);
1036}
1037
1038int gfs2_ea_set_i(struct gfs2_inode *ip, struct gfs2_ea_request *er)
1039{
1040 struct gfs2_ea_location el;
1041 int error;
1042
Steven Whitehouse3767ac22008-11-03 14:28:42 +00001043 if (!ip->i_eattr) {
David Teiglandb3b94fa2006-01-16 16:50:04 +00001044 if (er->er_flags & XATTR_REPLACE)
1045 return -ENODATA;
1046 return ea_init(ip, er);
1047 }
1048
1049 error = gfs2_ea_find(ip, er, &el);
1050 if (error)
1051 return error;
1052
1053 if (el.el_ea) {
Steven Whitehouse383f01f2008-11-04 10:05:22 +00001054 if (ip->i_diskflags & GFS2_DIF_APPENDONLY) {
David Teiglandb3b94fa2006-01-16 16:50:04 +00001055 brelse(el.el_bh);
1056 return -EPERM;
1057 }
1058
1059 error = -EEXIST;
1060 if (!(er->er_flags & XATTR_CREATE)) {
1061 int unstuffed = !GFS2_EA_IS_STUFFED(el.el_ea);
1062 error = ea_set_i(ip, er, &el);
1063 if (!error && unstuffed)
1064 ea_set_remove_unstuffed(ip, &el);
1065 }
1066
1067 brelse(el.el_bh);
1068 } else {
1069 error = -ENODATA;
1070 if (!(er->er_flags & XATTR_REPLACE))
1071 error = ea_set_i(ip, er, NULL);
1072 }
1073
1074 return error;
1075}
1076
1077int gfs2_ea_set(struct gfs2_inode *ip, struct gfs2_ea_request *er)
1078{
1079 struct gfs2_holder i_gh;
1080 int error;
1081
Steven Whitehousecca195c2006-09-05 13:15:18 -04001082 if (!er->er_name_len || er->er_name_len > GFS2_EA_MAX_NAME_LEN)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001083 return -EINVAL;
1084 if (!er->er_data || !er->er_data_len) {
1085 er->er_data = NULL;
1086 er->er_data_len = 0;
1087 }
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001088 error = ea_check_size(GFS2_SB(&ip->i_inode), er);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001089 if (error)
1090 return error;
1091
1092 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
1093 if (error)
1094 return error;
1095
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001096 if (IS_IMMUTABLE(&ip->i_inode))
David Teiglandb3b94fa2006-01-16 16:50:04 +00001097 error = -EPERM;
1098 else
1099 error = gfs2_ea_ops[er->er_type]->eo_set(ip, er);
1100
1101 gfs2_glock_dq_uninit(&i_gh);
1102
1103 return error;
1104}
1105
1106static int ea_remove_stuffed(struct gfs2_inode *ip, struct gfs2_ea_location *el)
1107{
1108 struct gfs2_ea_header *ea = el->el_ea;
1109 struct gfs2_ea_header *prev = el->el_prev;
1110 struct buffer_head *dibh;
1111 int error;
1112
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001113 error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + RES_EATTR, 0);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001114 if (error)
1115 return error;
1116
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +00001117 gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001118
1119 if (prev) {
Steven Whitehousecd915492006-09-04 12:49:07 -04001120 u32 len;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001121
1122 len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
1123 prev->ea_rec_len = cpu_to_be32(len);
1124
1125 if (GFS2_EA_IS_LAST(ea))
1126 prev->ea_flags |= GFS2_EAFLAG_LAST;
1127 } else
1128 ea->ea_type = GFS2_EATYPE_UNUSED;
1129
1130 error = gfs2_meta_inode_buffer(ip, &dibh);
1131 if (!error) {
Steven Whitehouse4bd91ba2007-06-05 09:39:18 +01001132 ip->i_inode.i_ctime = CURRENT_TIME;
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +00001133 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
Steven Whitehouse539e5d62006-10-31 15:07:05 -05001134 gfs2_dinode_out(ip, dibh->b_data);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001135 brelse(dibh);
Steven Whitehouse907b9bc2006-09-25 09:26:04 -04001136 }
David Teiglandb3b94fa2006-01-16 16:50:04 +00001137
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001138 gfs2_trans_end(GFS2_SB(&ip->i_inode));
David Teiglandb3b94fa2006-01-16 16:50:04 +00001139
1140 return error;
1141}
1142
1143int gfs2_ea_remove_i(struct gfs2_inode *ip, struct gfs2_ea_request *er)
1144{
1145 struct gfs2_ea_location el;
1146 int error;
1147
Steven Whitehouse3767ac22008-11-03 14:28:42 +00001148 if (!ip->i_eattr)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001149 return -ENODATA;
1150
1151 error = gfs2_ea_find(ip, er, &el);
1152 if (error)
1153 return error;
1154 if (!el.el_ea)
1155 return -ENODATA;
1156
1157 if (GFS2_EA_IS_STUFFED(el.el_ea))
1158 error = ea_remove_stuffed(ip, &el);
1159 else
1160 error = ea_remove_unstuffed(ip, el.el_bh, el.el_ea, el.el_prev,
1161 0);
1162
1163 brelse(el.el_bh);
1164
1165 return error;
1166}
1167
1168/**
1169 * gfs2_ea_remove - sets (or creates or replaces) an extended attribute
1170 * @ip: pointer to the inode of the target file
1171 * @er: request information
1172 *
1173 * Returns: errno
1174 */
1175
1176int gfs2_ea_remove(struct gfs2_inode *ip, struct gfs2_ea_request *er)
1177{
1178 struct gfs2_holder i_gh;
1179 int error;
1180
1181 if (!er->er_name_len || er->er_name_len > GFS2_EA_MAX_NAME_LEN)
1182 return -EINVAL;
1183
1184 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
1185 if (error)
1186 return error;
1187
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001188 if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode))
David Teiglandb3b94fa2006-01-16 16:50:04 +00001189 error = -EPERM;
1190 else
1191 error = gfs2_ea_ops[er->er_type]->eo_remove(ip, er);
1192
1193 gfs2_glock_dq_uninit(&i_gh);
1194
1195 return error;
1196}
1197
1198static int ea_acl_chmod_unstuffed(struct gfs2_inode *ip,
1199 struct gfs2_ea_header *ea, char *data)
1200{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001201 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001202 struct buffer_head **bh;
1203 unsigned int amount = GFS2_EA_DATA_LEN(ea);
Steven Whitehouse5c676f62006-02-27 17:23:27 -05001204 unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize);
Al Virob44b84d2006-10-14 10:46:30 -04001205 __be64 *dataptrs = GFS2_EA2DATAPTRS(ea);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001206 unsigned int x;
1207 int error;
1208
Josef Bacik16c5f062008-04-09 09:33:41 -04001209 bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_NOFS);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001210 if (!bh)
1211 return -ENOMEM;
1212
1213 error = gfs2_trans_begin(sdp, nptrs + RES_DINODE, 0);
1214 if (error)
1215 goto out;
1216
1217 for (x = 0; x < nptrs; x++) {
Steven Whitehouse7276b3b2006-09-21 17:05:23 -04001218 error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs), 0,
1219 bh + x);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001220 if (error) {
1221 while (x--)
1222 brelse(bh[x]);
1223 goto fail;
1224 }
1225 dataptrs++;
1226 }
1227
1228 for (x = 0; x < nptrs; x++) {
Steven Whitehouse7276b3b2006-09-21 17:05:23 -04001229 error = gfs2_meta_wait(sdp, bh[x]);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001230 if (error) {
1231 for (; x < nptrs; x++)
1232 brelse(bh[x]);
1233 goto fail;
1234 }
1235 if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) {
1236 for (; x < nptrs; x++)
1237 brelse(bh[x]);
1238 error = -EIO;
1239 goto fail;
1240 }
1241
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +00001242 gfs2_trans_add_bh(ip->i_gl, bh[x], 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001243
Steven Whitehousecca195c2006-09-05 13:15:18 -04001244 memcpy(bh[x]->b_data + sizeof(struct gfs2_meta_header), data,
David Teiglandb3b94fa2006-01-16 16:50:04 +00001245 (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize);
1246
1247 amount -= sdp->sd_jbsize;
1248 data += sdp->sd_jbsize;
1249
1250 brelse(bh[x]);
1251 }
1252
Steven Whitehousea91ea692006-09-04 12:04:26 -04001253out:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001254 kfree(bh);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001255 return error;
1256
Steven Whitehousea91ea692006-09-04 12:04:26 -04001257fail:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001258 gfs2_trans_end(sdp);
1259 kfree(bh);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001260 return error;
1261}
1262
1263int gfs2_ea_acl_chmod(struct gfs2_inode *ip, struct gfs2_ea_location *el,
1264 struct iattr *attr, char *data)
1265{
1266 struct buffer_head *dibh;
1267 int error;
1268
1269 if (GFS2_EA_IS_STUFFED(el->el_ea)) {
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001270 error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + RES_EATTR, 0);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001271 if (error)
1272 return error;
1273
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +00001274 gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1);
Steven Whitehousecca195c2006-09-05 13:15:18 -04001275 memcpy(GFS2_EA2DATA(el->el_ea), data,
David Teiglandb3b94fa2006-01-16 16:50:04 +00001276 GFS2_EA_DATA_LEN(el->el_ea));
1277 } else
1278 error = ea_acl_chmod_unstuffed(ip, el->el_ea, data);
1279
1280 if (error)
1281 return error;
1282
1283 error = gfs2_meta_inode_buffer(ip, &dibh);
1284 if (!error) {
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001285 error = inode_setattr(&ip->i_inode, attr);
1286 gfs2_assert_warn(GFS2_SB(&ip->i_inode), !error);
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +00001287 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
Steven Whitehouse539e5d62006-10-31 15:07:05 -05001288 gfs2_dinode_out(ip, dibh->b_data);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001289 brelse(dibh);
1290 }
1291
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001292 gfs2_trans_end(GFS2_SB(&ip->i_inode));
David Teiglandb3b94fa2006-01-16 16:50:04 +00001293
1294 return error;
1295}
1296
1297static int ea_dealloc_indirect(struct gfs2_inode *ip)
1298{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001299 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001300 struct gfs2_rgrp_list rlist;
1301 struct buffer_head *indbh, *dibh;
Al Virob44b84d2006-10-14 10:46:30 -04001302 __be64 *eablk, *end;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001303 unsigned int rg_blocks = 0;
Steven Whitehousecd915492006-09-04 12:49:07 -04001304 u64 bstart = 0;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001305 unsigned int blen = 0;
1306 unsigned int blks = 0;
1307 unsigned int x;
1308 int error;
1309
1310 memset(&rlist, 0, sizeof(struct gfs2_rgrp_list));
1311
Steven Whitehouse3767ac22008-11-03 14:28:42 +00001312 error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT, &indbh);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001313 if (error)
1314 return error;
1315
1316 if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) {
1317 error = -EIO;
1318 goto out;
1319 }
1320
Al Virob44b84d2006-10-14 10:46:30 -04001321 eablk = (__be64 *)(indbh->b_data + sizeof(struct gfs2_meta_header));
David Teiglandb3b94fa2006-01-16 16:50:04 +00001322 end = eablk + sdp->sd_inptrs;
1323
1324 for (; eablk < end; eablk++) {
Steven Whitehousecd915492006-09-04 12:49:07 -04001325 u64 bn;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001326
1327 if (!*eablk)
1328 break;
1329 bn = be64_to_cpu(*eablk);
1330
1331 if (bstart + blen == bn)
1332 blen++;
1333 else {
1334 if (bstart)
1335 gfs2_rlist_add(sdp, &rlist, bstart);
1336 bstart = bn;
1337 blen = 1;
1338 }
1339 blks++;
1340 }
1341 if (bstart)
1342 gfs2_rlist_add(sdp, &rlist, bstart);
1343 else
1344 goto out;
1345
Bob Petersonfe6c9912008-01-28 11:13:02 -06001346 gfs2_rlist_alloc(&rlist, LM_ST_EXCLUSIVE);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001347
1348 for (x = 0; x < rlist.rl_rgrps; x++) {
1349 struct gfs2_rgrpd *rgd;
Steven Whitehouse5c676f62006-02-27 17:23:27 -05001350 rgd = rlist.rl_ghs[x].gh_gl->gl_object;
Steven Whitehousebb8d8a62007-06-01 14:11:58 +01001351 rg_blocks += rgd->rd_length;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001352 }
1353
1354 error = gfs2_glock_nq_m(rlist.rl_rgrps, rlist.rl_ghs);
1355 if (error)
1356 goto out_rlist_free;
1357
Steven Whitehousecca195c2006-09-05 13:15:18 -04001358 error = gfs2_trans_begin(sdp, rg_blocks + RES_DINODE + RES_INDIRECT +
1359 RES_STATFS + RES_QUOTA, blks);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001360 if (error)
1361 goto out_gunlock;
1362
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +00001363 gfs2_trans_add_bh(ip->i_gl, indbh, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001364
Al Virob44b84d2006-10-14 10:46:30 -04001365 eablk = (__be64 *)(indbh->b_data + sizeof(struct gfs2_meta_header));
David Teiglandb3b94fa2006-01-16 16:50:04 +00001366 bstart = 0;
1367 blen = 0;
1368
1369 for (; eablk < end; eablk++) {
Steven Whitehousecd915492006-09-04 12:49:07 -04001370 u64 bn;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001371
1372 if (!*eablk)
1373 break;
1374 bn = be64_to_cpu(*eablk);
1375
1376 if (bstart + blen == bn)
1377 blen++;
1378 else {
1379 if (bstart)
1380 gfs2_free_meta(ip, bstart, blen);
1381 bstart = bn;
1382 blen = 1;
1383 }
1384
1385 *eablk = 0;
Steven Whitehouse77658aa2008-02-12 14:17:27 +00001386 gfs2_add_inode_blocks(&ip->i_inode, -1);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001387 }
1388 if (bstart)
1389 gfs2_free_meta(ip, bstart, blen);
1390
Steven Whitehouse383f01f2008-11-04 10:05:22 +00001391 ip->i_diskflags &= ~GFS2_DIF_EA_INDIRECT;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001392
1393 error = gfs2_meta_inode_buffer(ip, &dibh);
1394 if (!error) {
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +00001395 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
Steven Whitehouse539e5d62006-10-31 15:07:05 -05001396 gfs2_dinode_out(ip, dibh->b_data);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001397 brelse(dibh);
1398 }
1399
1400 gfs2_trans_end(sdp);
1401
Steven Whitehousea91ea692006-09-04 12:04:26 -04001402out_gunlock:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001403 gfs2_glock_dq_m(rlist.rl_rgrps, rlist.rl_ghs);
Steven Whitehousea91ea692006-09-04 12:04:26 -04001404out_rlist_free:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001405 gfs2_rlist_free(&rlist);
Steven Whitehousea91ea692006-09-04 12:04:26 -04001406out:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001407 brelse(indbh);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001408 return error;
1409}
1410
1411static int ea_dealloc_block(struct gfs2_inode *ip)
1412{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001413 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
Steven Whitehouse6dbd8222008-01-10 15:18:55 +00001414 struct gfs2_alloc *al = ip->i_alloc;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001415 struct gfs2_rgrpd *rgd;
1416 struct buffer_head *dibh;
1417 int error;
1418
Steven Whitehouse3767ac22008-11-03 14:28:42 +00001419 rgd = gfs2_blk2rgrpd(sdp, ip->i_eattr);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001420 if (!rgd) {
1421 gfs2_consist_inode(ip);
1422 return -EIO;
1423 }
1424
1425 error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0,
1426 &al->al_rgd_gh);
1427 if (error)
1428 return error;
1429
Steven Whitehousecca195c2006-09-05 13:15:18 -04001430 error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_DINODE + RES_STATFS +
1431 RES_QUOTA, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001432 if (error)
1433 goto out_gunlock;
1434
Steven Whitehouse3767ac22008-11-03 14:28:42 +00001435 gfs2_free_meta(ip, ip->i_eattr, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001436
Steven Whitehouse3767ac22008-11-03 14:28:42 +00001437 ip->i_eattr = 0;
Steven Whitehouse77658aa2008-02-12 14:17:27 +00001438 gfs2_add_inode_blocks(&ip->i_inode, -1);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001439
1440 error = gfs2_meta_inode_buffer(ip, &dibh);
1441 if (!error) {
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +00001442 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
Steven Whitehouse539e5d62006-10-31 15:07:05 -05001443 gfs2_dinode_out(ip, dibh->b_data);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001444 brelse(dibh);
1445 }
1446
1447 gfs2_trans_end(sdp);
1448
Steven Whitehousea91ea692006-09-04 12:04:26 -04001449out_gunlock:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001450 gfs2_glock_dq_uninit(&al->al_rgd_gh);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001451 return error;
1452}
1453
1454/**
1455 * gfs2_ea_dealloc - deallocate the extended attribute fork
1456 * @ip: the inode
1457 *
1458 * Returns: errno
1459 */
1460
1461int gfs2_ea_dealloc(struct gfs2_inode *ip)
1462{
1463 struct gfs2_alloc *al;
1464 int error;
1465
1466 al = gfs2_alloc_get(ip);
Cyrill Gorcunov182fe5a2008-03-03 21:54:21 +03001467 if (!al)
1468 return -ENOMEM;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001469
1470 error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
1471 if (error)
1472 goto out_alloc;
1473
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001474 error = gfs2_rindex_hold(GFS2_SB(&ip->i_inode), &al->al_ri_gh);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001475 if (error)
1476 goto out_quota;
1477
1478 error = ea_foreach(ip, ea_dealloc_unstuffed, NULL);
1479 if (error)
1480 goto out_rindex;
1481
Steven Whitehouse383f01f2008-11-04 10:05:22 +00001482 if (ip->i_diskflags & GFS2_DIF_EA_INDIRECT) {
David Teiglandb3b94fa2006-01-16 16:50:04 +00001483 error = ea_dealloc_indirect(ip);
1484 if (error)
1485 goto out_rindex;
1486 }
1487
1488 error = ea_dealloc_block(ip);
1489
Steven Whitehousea91ea692006-09-04 12:04:26 -04001490out_rindex:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001491 gfs2_glock_dq_uninit(&al->al_ri_gh);
Steven Whitehousea91ea692006-09-04 12:04:26 -04001492out_quota:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001493 gfs2_quota_unhold(ip);
Steven Whitehousea91ea692006-09-04 12:04:26 -04001494out_alloc:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001495 gfs2_alloc_put(ip);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001496 return error;
1497}
1498