blob: ecd37f30ab91986923c5fa8c0cdf02f1bd3d330b [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>
David Teiglandb3b94fa2006-01-16 16:50:04 +000016#include <asm/uaccess.h>
17
18#include "gfs2.h"
Steven Whitehouse5c676f62006-02-27 17:23:27 -050019#include "incore.h"
David Teiglandb3b94fa2006-01-16 16:50:04 +000020#include "acl.h"
Steven Whitehouse307cf6e2009-08-26 18:51:04 +010021#include "xattr.h"
David Teiglandb3b94fa2006-01-16 16:50:04 +000022#include "glock.h"
23#include "inode.h"
24#include "meta_io.h"
25#include "quota.h"
26#include "rgrp.h"
27#include "trans.h"
Steven Whitehouse5c676f62006-02-27 17:23:27 -050028#include "util.h"
David Teiglandb3b94fa2006-01-16 16:50:04 +000029
30/**
31 * ea_calc_size - returns the acutal number of bytes the request will take up
32 * (not counting any unstuffed data blocks)
33 * @sdp:
34 * @er:
35 * @size:
36 *
37 * Returns: 1 if the EA should be stuffed
38 */
39
Steven Whitehouse40b78a32009-08-26 18:41:32 +010040static int ea_calc_size(struct gfs2_sbd *sdp, unsigned int nsize, size_t dsize,
David Teiglandb3b94fa2006-01-16 16:50:04 +000041 unsigned int *size)
42{
Steven Whitehouse40b78a32009-08-26 18:41:32 +010043 unsigned int jbsize = sdp->sd_jbsize;
44
45 /* Stuffed */
46 *size = ALIGN(sizeof(struct gfs2_ea_header) + nsize + dsize, 8);
47
48 if (*size <= jbsize)
David Teiglandb3b94fa2006-01-16 16:50:04 +000049 return 1;
50
Steven Whitehouse40b78a32009-08-26 18:41:32 +010051 /* Unstuffed */
52 *size = ALIGN(sizeof(struct gfs2_ea_header) + nsize +
53 (sizeof(__be64) * DIV_ROUND_UP(dsize, jbsize)), 8);
David Teiglandb3b94fa2006-01-16 16:50:04 +000054
55 return 0;
56}
57
Steven Whitehouse40b78a32009-08-26 18:41:32 +010058static int ea_check_size(struct gfs2_sbd *sdp, unsigned int nsize, size_t dsize)
David Teiglandb3b94fa2006-01-16 16:50:04 +000059{
60 unsigned int size;
61
Steven Whitehouse40b78a32009-08-26 18:41:32 +010062 if (dsize > GFS2_EA_MAX_DATA_LEN)
David Teiglandb3b94fa2006-01-16 16:50:04 +000063 return -ERANGE;
64
Steven Whitehouse40b78a32009-08-26 18:41:32 +010065 ea_calc_size(sdp, nsize, dsize, &size);
David Teiglandb3b94fa2006-01-16 16:50:04 +000066
67 /* This can only happen with 512 byte blocks */
68 if (size > sdp->sd_jbsize)
69 return -ERANGE;
70
71 return 0;
72}
73
Steven Whitehousecca195c2006-09-05 13:15:18 -040074typedef int (*ea_call_t) (struct gfs2_inode *ip, struct buffer_head *bh,
David Teiglandb3b94fa2006-01-16 16:50:04 +000075 struct gfs2_ea_header *ea,
Steven Whitehousecca195c2006-09-05 13:15:18 -040076 struct gfs2_ea_header *prev, void *private);
David Teiglandb3b94fa2006-01-16 16:50:04 +000077
78static int ea_foreach_i(struct gfs2_inode *ip, struct buffer_head *bh,
79 ea_call_t ea_call, void *data)
80{
81 struct gfs2_ea_header *ea, *prev = NULL;
82 int error = 0;
83
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -040084 if (gfs2_metatype_check(GFS2_SB(&ip->i_inode), bh, GFS2_METATYPE_EA))
David Teiglandb3b94fa2006-01-16 16:50:04 +000085 return -EIO;
86
87 for (ea = GFS2_EA_BH2FIRST(bh);; prev = ea, ea = GFS2_EA2NEXT(ea)) {
88 if (!GFS2_EA_REC_LEN(ea))
89 goto fail;
Steven Whitehousecca195c2006-09-05 13:15:18 -040090 if (!(bh->b_data <= (char *)ea && (char *)GFS2_EA2NEXT(ea) <=
91 bh->b_data + bh->b_size))
David Teiglandb3b94fa2006-01-16 16:50:04 +000092 goto fail;
93 if (!GFS2_EATYPE_VALID(ea->ea_type))
94 goto fail;
95
96 error = ea_call(ip, bh, ea, prev, data);
97 if (error)
98 return error;
99
100 if (GFS2_EA_IS_LAST(ea)) {
101 if ((char *)GFS2_EA2NEXT(ea) !=
102 bh->b_data + bh->b_size)
103 goto fail;
104 break;
105 }
106 }
107
108 return error;
109
Steven Whitehousea91ea692006-09-04 12:04:26 -0400110fail:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000111 gfs2_consist_inode(ip);
112 return -EIO;
113}
114
115static int ea_foreach(struct gfs2_inode *ip, ea_call_t ea_call, void *data)
116{
117 struct buffer_head *bh, *eabh;
Al Virob44b84d2006-10-14 10:46:30 -0400118 __be64 *eablk, *end;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000119 int error;
120
Steven Whitehouse3767ac22008-11-03 14:28:42 +0000121 error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT, &bh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000122 if (error)
123 return error;
124
Steven Whitehouse383f01f2008-11-04 10:05:22 +0000125 if (!(ip->i_diskflags & GFS2_DIF_EA_INDIRECT)) {
David Teiglandb3b94fa2006-01-16 16:50:04 +0000126 error = ea_foreach_i(ip, bh, ea_call, data);
127 goto out;
128 }
129
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400130 if (gfs2_metatype_check(GFS2_SB(&ip->i_inode), bh, GFS2_METATYPE_IN)) {
David Teiglandb3b94fa2006-01-16 16:50:04 +0000131 error = -EIO;
132 goto out;
133 }
134
Al Virob44b84d2006-10-14 10:46:30 -0400135 eablk = (__be64 *)(bh->b_data + sizeof(struct gfs2_meta_header));
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400136 end = eablk + GFS2_SB(&ip->i_inode)->sd_inptrs;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000137
138 for (; eablk < end; eablk++) {
Steven Whitehousecd915492006-09-04 12:49:07 -0400139 u64 bn;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000140
141 if (!*eablk)
142 break;
143 bn = be64_to_cpu(*eablk);
144
Steven Whitehouse7276b3b2006-09-21 17:05:23 -0400145 error = gfs2_meta_read(ip->i_gl, bn, DIO_WAIT, &eabh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000146 if (error)
147 break;
148 error = ea_foreach_i(ip, eabh, ea_call, data);
149 brelse(eabh);
150 if (error)
151 break;
152 }
Steven Whitehousea91ea692006-09-04 12:04:26 -0400153out:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000154 brelse(bh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000155 return error;
156}
157
158struct ea_find {
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100159 int type;
160 const char *name;
161 size_t namel;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000162 struct gfs2_ea_location *ef_el;
163};
164
165static int ea_find_i(struct gfs2_inode *ip, struct buffer_head *bh,
166 struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
167 void *private)
168{
169 struct ea_find *ef = private;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000170
171 if (ea->ea_type == GFS2_EATYPE_UNUSED)
172 return 0;
173
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100174 if (ea->ea_type == ef->type) {
175 if (ea->ea_name_len == ef->namel &&
176 !memcmp(GFS2_EA2NAME(ea), ef->name, ea->ea_name_len)) {
David Teiglandb3b94fa2006-01-16 16:50:04 +0000177 struct gfs2_ea_location *el = ef->ef_el;
178 get_bh(bh);
179 el->el_bh = bh;
180 el->el_ea = ea;
181 el->el_prev = prev;
182 return 1;
183 }
184 }
185
David Teiglandb3b94fa2006-01-16 16:50:04 +0000186 return 0;
187}
188
Steven Whitehouse479c4272009-10-02 12:00:00 +0100189static int gfs2_ea_find(struct gfs2_inode *ip, int type, const char *name,
190 struct gfs2_ea_location *el)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000191{
192 struct ea_find ef;
193 int error;
194
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100195 ef.type = type;
196 ef.name = name;
197 ef.namel = strlen(name);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000198 ef.ef_el = el;
199
200 memset(el, 0, sizeof(struct gfs2_ea_location));
201
202 error = ea_foreach(ip, ea_find_i, &ef);
203 if (error > 0)
204 return 0;
205
206 return error;
207}
208
209/**
210 * ea_dealloc_unstuffed -
211 * @ip:
212 * @bh:
213 * @ea:
214 * @prev:
215 * @private:
216 *
217 * Take advantage of the fact that all unstuffed blocks are
218 * allocated from the same RG. But watch, this may not always
219 * be true.
220 *
221 * Returns: errno
222 */
223
224static int ea_dealloc_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh,
225 struct gfs2_ea_header *ea,
226 struct gfs2_ea_header *prev, void *private)
227{
228 int *leave = private;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400229 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000230 struct gfs2_rgrpd *rgd;
231 struct gfs2_holder rg_gh;
232 struct buffer_head *dibh;
Al Virob44b84d2006-10-14 10:46:30 -0400233 __be64 *dataptrs;
234 u64 bn = 0;
Steven Whitehousecd915492006-09-04 12:49:07 -0400235 u64 bstart = 0;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000236 unsigned int blen = 0;
237 unsigned int blks = 0;
238 unsigned int x;
239 int error;
240
Bob Peterson5e2f7d62012-04-04 22:11:16 -0400241 error = gfs2_rindex_update(sdp);
242 if (error)
243 return error;
244
David Teiglandb3b94fa2006-01-16 16:50:04 +0000245 if (GFS2_EA_IS_STUFFED(ea))
246 return 0;
247
248 dataptrs = GFS2_EA2DATAPTRS(ea);
Steven Whitehousecca195c2006-09-05 13:15:18 -0400249 for (x = 0; x < ea->ea_num_ptrs; x++, dataptrs++) {
David Teiglandb3b94fa2006-01-16 16:50:04 +0000250 if (*dataptrs) {
251 blks++;
252 bn = be64_to_cpu(*dataptrs);
253 }
Steven Whitehousecca195c2006-09-05 13:15:18 -0400254 }
David Teiglandb3b94fa2006-01-16 16:50:04 +0000255 if (!blks)
256 return 0;
257
Steven Whitehouse66fc0612012-02-08 12:58:32 +0000258 rgd = gfs2_blk2rgrpd(sdp, bn, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000259 if (!rgd) {
260 gfs2_consist_inode(ip);
261 return -EIO;
262 }
263
264 error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &rg_gh);
265 if (error)
266 return error;
267
Steven Whitehousebb8d8a62007-06-01 14:11:58 +0100268 error = gfs2_trans_begin(sdp, rgd->rd_length + RES_DINODE +
Steven Whitehousecca195c2006-09-05 13:15:18 -0400269 RES_EATTR + RES_STATFS + RES_QUOTA, blks);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000270 if (error)
271 goto out_gunlock;
272
Steven Whitehouse350a9b02012-12-14 12:36:02 +0000273 gfs2_trans_add_meta(ip->i_gl, bh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000274
275 dataptrs = GFS2_EA2DATAPTRS(ea);
276 for (x = 0; x < ea->ea_num_ptrs; x++, dataptrs++) {
277 if (!*dataptrs)
278 break;
279 bn = be64_to_cpu(*dataptrs);
280
281 if (bstart + blen == bn)
282 blen++;
283 else {
284 if (bstart)
285 gfs2_free_meta(ip, bstart, blen);
286 bstart = bn;
287 blen = 1;
288 }
289
290 *dataptrs = 0;
Steven Whitehouse77658aa2008-02-12 14:17:27 +0000291 gfs2_add_inode_blocks(&ip->i_inode, -1);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000292 }
293 if (bstart)
294 gfs2_free_meta(ip, bstart, blen);
295
296 if (prev && !leave) {
Steven Whitehousecd915492006-09-04 12:49:07 -0400297 u32 len;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000298
299 len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
300 prev->ea_rec_len = cpu_to_be32(len);
301
302 if (GFS2_EA_IS_LAST(ea))
303 prev->ea_flags |= GFS2_EAFLAG_LAST;
304 } else {
305 ea->ea_type = GFS2_EATYPE_UNUSED;
306 ea->ea_num_ptrs = 0;
307 }
308
309 error = gfs2_meta_inode_buffer(ip, &dibh);
310 if (!error) {
Steven Whitehouse4bd91ba2007-06-05 09:39:18 +0100311 ip->i_inode.i_ctime = CURRENT_TIME;
Steven Whitehouse350a9b02012-12-14 12:36:02 +0000312 gfs2_trans_add_meta(ip->i_gl, dibh);
Steven Whitehouse539e5d62006-10-31 15:07:05 -0500313 gfs2_dinode_out(ip, dibh->b_data);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000314 brelse(dibh);
315 }
316
317 gfs2_trans_end(sdp);
318
Steven Whitehousea91ea692006-09-04 12:04:26 -0400319out_gunlock:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000320 gfs2_glock_dq_uninit(&rg_gh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000321 return error;
322}
323
324static int ea_remove_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh,
325 struct gfs2_ea_header *ea,
326 struct gfs2_ea_header *prev, int leave)
327{
David Teiglandb3b94fa2006-01-16 16:50:04 +0000328 int error;
329
Bob Peterson8e2e0042012-07-19 08:12:40 -0400330 error = gfs2_rindex_update(GFS2_SB(&ip->i_inode));
331 if (error)
332 return error;
333
Eric W. Biedermanf4108a62013-01-31 17:49:26 -0800334 error = gfs2_quota_hold(ip, NO_UID_QUOTA_CHANGE, NO_GID_QUOTA_CHANGE);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000335 if (error)
336 goto out_alloc;
337
Steven Whitehousecca195c2006-09-05 13:15:18 -0400338 error = ea_dealloc_unstuffed(ip, bh, ea, prev, (leave) ? &error : NULL);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000339
David Teiglandb3b94fa2006-01-16 16:50:04 +0000340 gfs2_quota_unhold(ip);
Steven Whitehousea91ea692006-09-04 12:04:26 -0400341out_alloc:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000342 return error;
343}
344
David Teiglandb3b94fa2006-01-16 16:50:04 +0000345struct ea_list {
346 struct gfs2_ea_request *ei_er;
347 unsigned int ei_size;
348};
349
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100350static inline unsigned int gfs2_ea_strlen(struct gfs2_ea_header *ea)
351{
352 switch (ea->ea_type) {
353 case GFS2_EATYPE_USR:
354 return 5 + ea->ea_name_len + 1;
355 case GFS2_EATYPE_SYS:
356 return 7 + ea->ea_name_len + 1;
357 case GFS2_EATYPE_SECURITY:
358 return 9 + ea->ea_name_len + 1;
359 default:
360 return 0;
361 }
362}
363
David Teiglandb3b94fa2006-01-16 16:50:04 +0000364static int ea_list_i(struct gfs2_inode *ip, struct buffer_head *bh,
365 struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
366 void *private)
367{
368 struct ea_list *ei = private;
369 struct gfs2_ea_request *er = ei->ei_er;
Ryan O'Hara639b6d72006-05-22 10:08:35 -0400370 unsigned int ea_size = gfs2_ea_strlen(ea);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000371
372 if (ea->ea_type == GFS2_EATYPE_UNUSED)
373 return 0;
374
375 if (er->er_data_len) {
Steven Whitehouse01eb7c02006-06-06 17:31:30 -0400376 char *prefix = NULL;
377 unsigned int l = 0;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000378 char c = 0;
379
380 if (ei->ei_size + ea_size > er->er_data_len)
381 return -ERANGE;
382
Ryan O'Hara639b6d72006-05-22 10:08:35 -0400383 switch (ea->ea_type) {
384 case GFS2_EATYPE_USR:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000385 prefix = "user.";
386 l = 5;
Ryan O'Hara639b6d72006-05-22 10:08:35 -0400387 break;
388 case GFS2_EATYPE_SYS:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000389 prefix = "system.";
390 l = 7;
Ryan O'Hara639b6d72006-05-22 10:08:35 -0400391 break;
392 case GFS2_EATYPE_SECURITY:
393 prefix = "security.";
394 l = 9;
395 break;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000396 }
397
Steven Whitehouse01eb7c02006-06-06 17:31:30 -0400398 BUG_ON(l == 0);
399
Steven Whitehouse90cdd202006-05-22 10:36:25 -0400400 memcpy(er->er_data + ei->ei_size, prefix, l);
401 memcpy(er->er_data + ei->ei_size + l, GFS2_EA2NAME(ea),
David Teiglandb3b94fa2006-01-16 16:50:04 +0000402 ea->ea_name_len);
Steven Whitehouse90cdd202006-05-22 10:36:25 -0400403 memcpy(er->er_data + ei->ei_size + ea_size - 1, &c, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000404 }
405
406 ei->ei_size += ea_size;
407
408 return 0;
409}
410
411/**
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100412 * gfs2_listxattr - List gfs2 extended attributes
413 * @dentry: The dentry whose inode we are interested in
414 * @buffer: The buffer to write the results
415 * @size: The size of the buffer
David Teiglandb3b94fa2006-01-16 16:50:04 +0000416 *
417 * Returns: actual size of data on success, -errno on error
418 */
419
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100420ssize_t gfs2_listxattr(struct dentry *dentry, char *buffer, size_t size)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000421{
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100422 struct gfs2_inode *ip = GFS2_I(dentry->d_inode);
423 struct gfs2_ea_request er;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000424 struct gfs2_holder i_gh;
425 int error;
426
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100427 memset(&er, 0, sizeof(struct gfs2_ea_request));
428 if (size) {
429 er.er_data = buffer;
430 er.er_data_len = size;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000431 }
432
Steven Whitehousecca195c2006-09-05 13:15:18 -0400433 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000434 if (error)
435 return error;
436
Steven Whitehouse3767ac22008-11-03 14:28:42 +0000437 if (ip->i_eattr) {
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100438 struct ea_list ei = { .ei_er = &er, .ei_size = 0 };
David Teiglandb3b94fa2006-01-16 16:50:04 +0000439
440 error = ea_foreach(ip, ea_list_i, &ei);
441 if (!error)
442 error = ei.ei_size;
443 }
444
445 gfs2_glock_dq_uninit(&i_gh);
446
447 return error;
448}
449
450/**
Steven Whitehouse1f981692012-07-26 11:26:36 +0100451 * ea_iter_unstuffed - copies the unstuffed xattr data to/from the
452 * request buffer
Steven Whitehousecca195c2006-09-05 13:15:18 -0400453 * @ip: The GFS2 inode
454 * @ea: The extended attribute header structure
Steven Whitehouse1f981692012-07-26 11:26:36 +0100455 * @din: The data to be copied in
456 * @dout: The data to be copied out (one of din,dout will be NULL)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000457 *
458 * Returns: errno
459 */
460
Steven Whitehouse1f981692012-07-26 11:26:36 +0100461static int gfs2_iter_unstuffed(struct gfs2_inode *ip, struct gfs2_ea_header *ea,
462 const char *din, char *dout)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000463{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400464 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000465 struct buffer_head **bh;
466 unsigned int amount = GFS2_EA_DATA_LEN(ea);
Steven Whitehouse5c676f62006-02-27 17:23:27 -0500467 unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize);
Al Virob44b84d2006-10-14 10:46:30 -0400468 __be64 *dataptrs = GFS2_EA2DATAPTRS(ea);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000469 unsigned int x;
470 int error = 0;
Steven Whitehouse1f981692012-07-26 11:26:36 +0100471 unsigned char *pos;
472 unsigned cp_size;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000473
Josef Bacik16c5f062008-04-09 09:33:41 -0400474 bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_NOFS);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000475 if (!bh)
476 return -ENOMEM;
477
478 for (x = 0; x < nptrs; x++) {
Steven Whitehouse7276b3b2006-09-21 17:05:23 -0400479 error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs), 0,
480 bh + x);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000481 if (error) {
482 while (x--)
483 brelse(bh[x]);
484 goto out;
485 }
486 dataptrs++;
487 }
488
489 for (x = 0; x < nptrs; x++) {
Steven Whitehouse7276b3b2006-09-21 17:05:23 -0400490 error = gfs2_meta_wait(sdp, bh[x]);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000491 if (error) {
492 for (; x < nptrs; x++)
493 brelse(bh[x]);
494 goto out;
495 }
496 if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) {
497 for (; x < nptrs; x++)
498 brelse(bh[x]);
499 error = -EIO;
500 goto out;
501 }
502
Steven Whitehouse1f981692012-07-26 11:26:36 +0100503 pos = bh[x]->b_data + sizeof(struct gfs2_meta_header);
504 cp_size = (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize;
505
506 if (dout) {
507 memcpy(dout, pos, cp_size);
508 dout += sdp->sd_jbsize;
509 }
510
511 if (din) {
Steven Whitehouse350a9b02012-12-14 12:36:02 +0000512 gfs2_trans_add_meta(ip->i_gl, bh[x]);
Steven Whitehouse1f981692012-07-26 11:26:36 +0100513 memcpy(pos, din, cp_size);
514 din += sdp->sd_jbsize;
515 }
David Teiglandb3b94fa2006-01-16 16:50:04 +0000516
517 amount -= sdp->sd_jbsize;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000518 brelse(bh[x]);
519 }
520
Steven Whitehousea91ea692006-09-04 12:04:26 -0400521out:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000522 kfree(bh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000523 return error;
524}
525
Steven Whitehouse479c4272009-10-02 12:00:00 +0100526static int gfs2_ea_get_copy(struct gfs2_inode *ip, struct gfs2_ea_location *el,
527 char *data, size_t size)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000528{
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100529 int ret;
530 size_t len = GFS2_EA_DATA_LEN(el->el_ea);
531 if (len > size)
532 return -ERANGE;
533
David Teiglandb3b94fa2006-01-16 16:50:04 +0000534 if (GFS2_EA_IS_STUFFED(el->el_ea)) {
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100535 memcpy(data, GFS2_EA2DATA(el->el_ea), len);
536 return len;
537 }
Steven Whitehouse1f981692012-07-26 11:26:36 +0100538 ret = gfs2_iter_unstuffed(ip, el->el_ea, NULL, data);
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100539 if (ret < 0)
540 return ret;
541 return len;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000542}
543
Steven Whitehouse479c4272009-10-02 12:00:00 +0100544int gfs2_xattr_acl_get(struct gfs2_inode *ip, const char *name, char **ppdata)
545{
546 struct gfs2_ea_location el;
547 int error;
548 int len;
549 char *data;
550
551 error = gfs2_ea_find(ip, GFS2_EATYPE_SYS, name, &el);
552 if (error)
553 return error;
554 if (!el.el_ea)
555 goto out;
556 if (!GFS2_EA_DATA_LEN(el.el_ea))
557 goto out;
558
559 len = GFS2_EA_DATA_LEN(el.el_ea);
560 data = kmalloc(len, GFP_NOFS);
561 error = -ENOMEM;
562 if (data == NULL)
563 goto out;
564
565 error = gfs2_ea_get_copy(ip, &el, data, len);
Steven Whitehouse114b80c2011-11-09 12:54:43 +0000566 if (error < 0)
567 kfree(data);
568 else
569 *ppdata = data;
Steven Whitehouse479c4272009-10-02 12:00:00 +0100570out:
571 brelse(el.el_bh);
572 return error;
573}
574
David Teiglandb3b94fa2006-01-16 16:50:04 +0000575/**
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100576 * gfs2_xattr_get - Get a GFS2 extended attribute
577 * @inode: The inode
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100578 * @name: The name of the extended attribute
579 * @buffer: The buffer to write the result into
580 * @size: The size of the buffer
Christoph Hellwig431547b2009-11-13 09:52:56 +0000581 * @type: The type of extended attribute
David Teiglandb3b94fa2006-01-16 16:50:04 +0000582 *
583 * Returns: actual size of data on success, -errno on error
584 */
Christoph Hellwig431547b2009-11-13 09:52:56 +0000585static int gfs2_xattr_get(struct dentry *dentry, const char *name,
586 void *buffer, size_t size, int type)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000587{
Christoph Hellwig431547b2009-11-13 09:52:56 +0000588 struct gfs2_inode *ip = GFS2_I(dentry->d_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000589 struct gfs2_ea_location el;
590 int error;
591
Steven Whitehouse3767ac22008-11-03 14:28:42 +0000592 if (!ip->i_eattr)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000593 return -ENODATA;
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100594 if (strlen(name) > GFS2_EA_MAX_NAME_LEN)
595 return -EINVAL;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000596
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100597 error = gfs2_ea_find(ip, type, name, &el);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000598 if (error)
599 return error;
600 if (!el.el_ea)
601 return -ENODATA;
Steven Whitehouse86d00632009-09-14 09:50:57 +0100602 if (size)
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100603 error = gfs2_ea_get_copy(ip, &el, buffer, size);
604 else
David Teiglandb3b94fa2006-01-16 16:50:04 +0000605 error = GFS2_EA_DATA_LEN(el.el_ea);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000606 brelse(el.el_bh);
607
608 return error;
609}
610
611/**
David Teiglandb3b94fa2006-01-16 16:50:04 +0000612 * ea_alloc_blk - allocates a new block for extended attributes.
613 * @ip: A pointer to the inode that's getting extended attributes
Steven Whitehousecca195c2006-09-05 13:15:18 -0400614 * @bhp: Pointer to pointer to a struct buffer_head
David Teiglandb3b94fa2006-01-16 16:50:04 +0000615 *
616 * Returns: errno
617 */
618
619static int ea_alloc_blk(struct gfs2_inode *ip, struct buffer_head **bhp)
620{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400621 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000622 struct gfs2_ea_header *ea;
Steven Whitehouseb45e41d2008-02-06 10:11:15 +0000623 unsigned int n = 1;
Steven Whitehousecd915492006-09-04 12:49:07 -0400624 u64 block;
Steven Whitehouse09010972009-05-20 10:48:47 +0100625 int error;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000626
Bob Peterson6e87ed02011-11-18 10:58:32 -0500627 error = gfs2_alloc_blocks(ip, &block, &n, 0, NULL);
Steven Whitehouse09010972009-05-20 10:48:47 +0100628 if (error)
629 return error;
Steven Whitehouse5731be52008-02-01 13:16:55 +0000630 gfs2_trans_add_unrevoke(sdp, block, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000631 *bhp = gfs2_meta_new(ip->i_gl, block);
Steven Whitehouse350a9b02012-12-14 12:36:02 +0000632 gfs2_trans_add_meta(ip->i_gl, *bhp);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000633 gfs2_metatype_set(*bhp, GFS2_METATYPE_EA, GFS2_FORMAT_EA);
634 gfs2_buffer_clear_tail(*bhp, sizeof(struct gfs2_meta_header));
635
636 ea = GFS2_EA_BH2FIRST(*bhp);
637 ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize);
638 ea->ea_type = GFS2_EATYPE_UNUSED;
639 ea->ea_flags = GFS2_EAFLAG_LAST;
640 ea->ea_num_ptrs = 0;
641
Steven Whitehouse77658aa2008-02-12 14:17:27 +0000642 gfs2_add_inode_blocks(&ip->i_inode, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000643
644 return 0;
645}
646
647/**
648 * ea_write - writes the request info to an ea, creating new blocks if
649 * necessary
Steven Whitehousecca195c2006-09-05 13:15:18 -0400650 * @ip: inode that is being modified
651 * @ea: the location of the new ea in a block
David Teiglandb3b94fa2006-01-16 16:50:04 +0000652 * @er: the write request
653 *
654 * Note: does not update ea_rec_len or the GFS2_EAFLAG_LAST bin of ea_flags
655 *
656 * returns : errno
657 */
658
659static int ea_write(struct gfs2_inode *ip, struct gfs2_ea_header *ea,
660 struct gfs2_ea_request *er)
661{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400662 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
Steven Whitehouse09010972009-05-20 10:48:47 +0100663 int error;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000664
665 ea->ea_data_len = cpu_to_be32(er->er_data_len);
666 ea->ea_name_len = er->er_name_len;
667 ea->ea_type = er->er_type;
668 ea->__pad = 0;
669
670 memcpy(GFS2_EA2NAME(ea), er->er_name, er->er_name_len);
671
672 if (GFS2_EAREQ_SIZE_STUFFED(er) <= sdp->sd_jbsize) {
673 ea->ea_num_ptrs = 0;
674 memcpy(GFS2_EA2DATA(ea), er->er_data, er->er_data_len);
675 } else {
Al Virob44b84d2006-10-14 10:46:30 -0400676 __be64 *dataptr = GFS2_EA2DATAPTRS(ea);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000677 const char *data = er->er_data;
678 unsigned int data_len = er->er_data_len;
679 unsigned int copy;
680 unsigned int x;
681
Steven Whitehouse5c676f62006-02-27 17:23:27 -0500682 ea->ea_num_ptrs = DIV_ROUND_UP(er->er_data_len, sdp->sd_jbsize);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000683 for (x = 0; x < ea->ea_num_ptrs; x++) {
684 struct buffer_head *bh;
Steven Whitehousecd915492006-09-04 12:49:07 -0400685 u64 block;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000686 int mh_size = sizeof(struct gfs2_meta_header);
Steven Whitehouseb45e41d2008-02-06 10:11:15 +0000687 unsigned int n = 1;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000688
Bob Peterson6e87ed02011-11-18 10:58:32 -0500689 error = gfs2_alloc_blocks(ip, &block, &n, 0, NULL);
Steven Whitehouse09010972009-05-20 10:48:47 +0100690 if (error)
691 return error;
Steven Whitehouse5731be52008-02-01 13:16:55 +0000692 gfs2_trans_add_unrevoke(sdp, block, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000693 bh = gfs2_meta_new(ip->i_gl, block);
Steven Whitehouse350a9b02012-12-14 12:36:02 +0000694 gfs2_trans_add_meta(ip->i_gl, bh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000695 gfs2_metatype_set(bh, GFS2_METATYPE_ED, GFS2_FORMAT_ED);
696
Steven Whitehouse77658aa2008-02-12 14:17:27 +0000697 gfs2_add_inode_blocks(&ip->i_inode, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000698
Steven Whitehousecca195c2006-09-05 13:15:18 -0400699 copy = data_len > sdp->sd_jbsize ? sdp->sd_jbsize :
700 data_len;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000701 memcpy(bh->b_data + mh_size, data, copy);
702 if (copy < sdp->sd_jbsize)
703 memset(bh->b_data + mh_size + copy, 0,
704 sdp->sd_jbsize - copy);
705
Steven Whitehousecca195c2006-09-05 13:15:18 -0400706 *dataptr++ = cpu_to_be64(bh->b_blocknr);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000707 data += copy;
708 data_len -= copy;
709
710 brelse(bh);
711 }
712
713 gfs2_assert_withdraw(sdp, !data_len);
714 }
715
716 return 0;
717}
718
719typedef int (*ea_skeleton_call_t) (struct gfs2_inode *ip,
Steven Whitehousecca195c2006-09-05 13:15:18 -0400720 struct gfs2_ea_request *er, void *private);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000721
722static int ea_alloc_skeleton(struct gfs2_inode *ip, struct gfs2_ea_request *er,
723 unsigned int blks,
Steven Whitehousecca195c2006-09-05 13:15:18 -0400724 ea_skeleton_call_t skeleton_call, void *private)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000725{
David Teiglandb3b94fa2006-01-16 16:50:04 +0000726 struct buffer_head *dibh;
727 int error;
728
Bob Peterson8e2e0042012-07-19 08:12:40 -0400729 error = gfs2_rindex_update(GFS2_SB(&ip->i_inode));
730 if (error)
731 return error;
732
Steven Whitehoused82661d2008-03-10 15:34:50 +0000733 error = gfs2_quota_lock_check(ip);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000734 if (error)
Bob Peterson5407e242012-05-18 09:28:23 -0400735 return error;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000736
Steven Whitehouse9dbe9612012-10-31 10:37:10 +0000737 error = gfs2_inplace_reserve(ip, blks, 0);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000738 if (error)
739 goto out_gunlock_q;
740
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400741 error = gfs2_trans_begin(GFS2_SB(&ip->i_inode),
Steven Whitehouse71f890f2012-07-30 14:53:19 +0100742 blks + gfs2_rg_blocks(ip, blks) +
David Teiglandb3b94fa2006-01-16 16:50:04 +0000743 RES_DINODE + RES_STATFS + RES_QUOTA, 0);
744 if (error)
745 goto out_ipres;
746
747 error = skeleton_call(ip, er, private);
748 if (error)
749 goto out_end_trans;
750
751 error = gfs2_meta_inode_buffer(ip, &dibh);
752 if (!error) {
Steven Whitehouse4bd91ba2007-06-05 09:39:18 +0100753 ip->i_inode.i_ctime = CURRENT_TIME;
Steven Whitehouse350a9b02012-12-14 12:36:02 +0000754 gfs2_trans_add_meta(ip->i_gl, dibh);
Steven Whitehouse539e5d62006-10-31 15:07:05 -0500755 gfs2_dinode_out(ip, dibh->b_data);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000756 brelse(dibh);
757 }
758
Steven Whitehousea91ea692006-09-04 12:04:26 -0400759out_end_trans:
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400760 gfs2_trans_end(GFS2_SB(&ip->i_inode));
Steven Whitehousea91ea692006-09-04 12:04:26 -0400761out_ipres:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000762 gfs2_inplace_release(ip);
Steven Whitehousea91ea692006-09-04 12:04:26 -0400763out_gunlock_q:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000764 gfs2_quota_unlock(ip);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000765 return error;
766}
767
768static int ea_init_i(struct gfs2_inode *ip, struct gfs2_ea_request *er,
769 void *private)
770{
771 struct buffer_head *bh;
772 int error;
773
774 error = ea_alloc_blk(ip, &bh);
775 if (error)
776 return error;
777
Steven Whitehouse3767ac22008-11-03 14:28:42 +0000778 ip->i_eattr = bh->b_blocknr;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000779 error = ea_write(ip, GFS2_EA_BH2FIRST(bh), er);
780
781 brelse(bh);
782
783 return error;
784}
785
786/**
787 * ea_init - initializes a new eattr block
788 * @ip:
789 * @er:
790 *
791 * Returns: errno
792 */
793
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100794static int ea_init(struct gfs2_inode *ip, int type, const char *name,
795 const void *data, size_t size)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000796{
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100797 struct gfs2_ea_request er;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400798 unsigned int jbsize = GFS2_SB(&ip->i_inode)->sd_jbsize;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000799 unsigned int blks = 1;
800
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100801 er.er_type = type;
802 er.er_name = name;
803 er.er_name_len = strlen(name);
804 er.er_data = (void *)data;
805 er.er_data_len = size;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000806
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100807 if (GFS2_EAREQ_SIZE_STUFFED(&er) > jbsize)
808 blks += DIV_ROUND_UP(er.er_data_len, jbsize);
809
810 return ea_alloc_skeleton(ip, &er, blks, ea_init_i, NULL);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000811}
812
813static struct gfs2_ea_header *ea_split_ea(struct gfs2_ea_header *ea)
814{
Steven Whitehousecd915492006-09-04 12:49:07 -0400815 u32 ea_size = GFS2_EA_SIZE(ea);
Steven Whitehouse568f4c92006-02-27 12:00:42 -0500816 struct gfs2_ea_header *new = (struct gfs2_ea_header *)((char *)ea +
817 ea_size);
Steven Whitehousecd915492006-09-04 12:49:07 -0400818 u32 new_size = GFS2_EA_REC_LEN(ea) - ea_size;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000819 int last = ea->ea_flags & GFS2_EAFLAG_LAST;
820
821 ea->ea_rec_len = cpu_to_be32(ea_size);
822 ea->ea_flags ^= last;
823
824 new->ea_rec_len = cpu_to_be32(new_size);
825 new->ea_flags = last;
826
827 return new;
828}
829
830static void ea_set_remove_stuffed(struct gfs2_inode *ip,
831 struct gfs2_ea_location *el)
832{
833 struct gfs2_ea_header *ea = el->el_ea;
834 struct gfs2_ea_header *prev = el->el_prev;
Steven Whitehousecd915492006-09-04 12:49:07 -0400835 u32 len;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000836
Steven Whitehouse350a9b02012-12-14 12:36:02 +0000837 gfs2_trans_add_meta(ip->i_gl, el->el_bh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000838
839 if (!prev || !GFS2_EA_IS_STUFFED(ea)) {
840 ea->ea_type = GFS2_EATYPE_UNUSED;
841 return;
842 } else if (GFS2_EA2NEXT(prev) != ea) {
843 prev = GFS2_EA2NEXT(prev);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400844 gfs2_assert_withdraw(GFS2_SB(&ip->i_inode), GFS2_EA2NEXT(prev) == ea);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000845 }
846
847 len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
848 prev->ea_rec_len = cpu_to_be32(len);
849
850 if (GFS2_EA_IS_LAST(ea))
851 prev->ea_flags |= GFS2_EAFLAG_LAST;
852}
853
854struct ea_set {
855 int ea_split;
856
857 struct gfs2_ea_request *es_er;
858 struct gfs2_ea_location *es_el;
859
860 struct buffer_head *es_bh;
861 struct gfs2_ea_header *es_ea;
862};
863
864static int ea_set_simple_noalloc(struct gfs2_inode *ip, struct buffer_head *bh,
865 struct gfs2_ea_header *ea, struct ea_set *es)
866{
867 struct gfs2_ea_request *er = es->es_er;
868 struct buffer_head *dibh;
869 int error;
870
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400871 error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + 2 * RES_EATTR, 0);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000872 if (error)
873 return error;
874
Steven Whitehouse350a9b02012-12-14 12:36:02 +0000875 gfs2_trans_add_meta(ip->i_gl, bh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000876
877 if (es->ea_split)
878 ea = ea_split_ea(ea);
879
880 ea_write(ip, ea, er);
881
882 if (es->es_el)
883 ea_set_remove_stuffed(ip, es->es_el);
884
885 error = gfs2_meta_inode_buffer(ip, &dibh);
886 if (error)
887 goto out;
Steven Whitehouse4bd91ba2007-06-05 09:39:18 +0100888 ip->i_inode.i_ctime = CURRENT_TIME;
Steven Whitehouse350a9b02012-12-14 12:36:02 +0000889 gfs2_trans_add_meta(ip->i_gl, dibh);
Steven Whitehouse539e5d62006-10-31 15:07:05 -0500890 gfs2_dinode_out(ip, dibh->b_data);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000891 brelse(dibh);
Steven Whitehousea91ea692006-09-04 12:04:26 -0400892out:
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400893 gfs2_trans_end(GFS2_SB(&ip->i_inode));
David Teiglandb3b94fa2006-01-16 16:50:04 +0000894 return error;
895}
896
897static int ea_set_simple_alloc(struct gfs2_inode *ip,
898 struct gfs2_ea_request *er, void *private)
899{
900 struct ea_set *es = private;
901 struct gfs2_ea_header *ea = es->es_ea;
902 int error;
903
Steven Whitehouse350a9b02012-12-14 12:36:02 +0000904 gfs2_trans_add_meta(ip->i_gl, es->es_bh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000905
906 if (es->ea_split)
907 ea = ea_split_ea(ea);
908
909 error = ea_write(ip, ea, er);
910 if (error)
911 return error;
912
913 if (es->es_el)
914 ea_set_remove_stuffed(ip, es->es_el);
915
916 return 0;
917}
918
919static int ea_set_simple(struct gfs2_inode *ip, struct buffer_head *bh,
920 struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
921 void *private)
922{
923 struct ea_set *es = private;
924 unsigned int size;
925 int stuffed;
926 int error;
927
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100928 stuffed = ea_calc_size(GFS2_SB(&ip->i_inode), es->es_er->er_name_len,
929 es->es_er->er_data_len, &size);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000930
931 if (ea->ea_type == GFS2_EATYPE_UNUSED) {
932 if (GFS2_EA_REC_LEN(ea) < size)
933 return 0;
934 if (!GFS2_EA_IS_STUFFED(ea)) {
935 error = ea_remove_unstuffed(ip, bh, ea, prev, 1);
936 if (error)
937 return error;
938 }
939 es->ea_split = 0;
940 } else if (GFS2_EA_REC_LEN(ea) - GFS2_EA_SIZE(ea) >= size)
941 es->ea_split = 1;
942 else
943 return 0;
944
945 if (stuffed) {
946 error = ea_set_simple_noalloc(ip, bh, ea, es);
947 if (error)
948 return error;
949 } else {
950 unsigned int blks;
951
952 es->es_bh = bh;
953 es->es_ea = ea;
Steven Whitehouse5c676f62006-02-27 17:23:27 -0500954 blks = 2 + DIV_ROUND_UP(es->es_er->er_data_len,
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400955 GFS2_SB(&ip->i_inode)->sd_jbsize);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000956
957 error = ea_alloc_skeleton(ip, es->es_er, blks,
958 ea_set_simple_alloc, es);
959 if (error)
960 return error;
961 }
962
963 return 1;
964}
965
966static int ea_set_block(struct gfs2_inode *ip, struct gfs2_ea_request *er,
967 void *private)
968{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400969 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000970 struct buffer_head *indbh, *newbh;
Al Virob44b84d2006-10-14 10:46:30 -0400971 __be64 *eablk;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000972 int error;
973 int mh_size = sizeof(struct gfs2_meta_header);
974
Steven Whitehouse383f01f2008-11-04 10:05:22 +0000975 if (ip->i_diskflags & GFS2_DIF_EA_INDIRECT) {
Al Virob44b84d2006-10-14 10:46:30 -0400976 __be64 *end;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000977
Steven Whitehouse3767ac22008-11-03 14:28:42 +0000978 error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT,
Steven Whitehouse7276b3b2006-09-21 17:05:23 -0400979 &indbh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000980 if (error)
981 return error;
982
983 if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) {
984 error = -EIO;
985 goto out;
986 }
987
Al Virob44b84d2006-10-14 10:46:30 -0400988 eablk = (__be64 *)(indbh->b_data + mh_size);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000989 end = eablk + sdp->sd_inptrs;
990
991 for (; eablk < end; eablk++)
992 if (!*eablk)
993 break;
994
995 if (eablk == end) {
996 error = -ENOSPC;
997 goto out;
998 }
999
Steven Whitehouse350a9b02012-12-14 12:36:02 +00001000 gfs2_trans_add_meta(ip->i_gl, indbh);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001001 } else {
Steven Whitehousecd915492006-09-04 12:49:07 -04001002 u64 blk;
Steven Whitehouseb45e41d2008-02-06 10:11:15 +00001003 unsigned int n = 1;
Bob Peterson6e87ed02011-11-18 10:58:32 -05001004 error = gfs2_alloc_blocks(ip, &blk, &n, 0, NULL);
Steven Whitehouse09010972009-05-20 10:48:47 +01001005 if (error)
1006 return error;
Steven Whitehouse5731be52008-02-01 13:16:55 +00001007 gfs2_trans_add_unrevoke(sdp, blk, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001008 indbh = gfs2_meta_new(ip->i_gl, blk);
Steven Whitehouse350a9b02012-12-14 12:36:02 +00001009 gfs2_trans_add_meta(ip->i_gl, indbh);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001010 gfs2_metatype_set(indbh, GFS2_METATYPE_IN, GFS2_FORMAT_IN);
1011 gfs2_buffer_clear_tail(indbh, mh_size);
1012
Al Virob44b84d2006-10-14 10:46:30 -04001013 eablk = (__be64 *)(indbh->b_data + mh_size);
Steven Whitehouse3767ac22008-11-03 14:28:42 +00001014 *eablk = cpu_to_be64(ip->i_eattr);
1015 ip->i_eattr = blk;
Steven Whitehouse383f01f2008-11-04 10:05:22 +00001016 ip->i_diskflags |= GFS2_DIF_EA_INDIRECT;
Steven Whitehouse77658aa2008-02-12 14:17:27 +00001017 gfs2_add_inode_blocks(&ip->i_inode, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001018
1019 eablk++;
1020 }
1021
1022 error = ea_alloc_blk(ip, &newbh);
1023 if (error)
1024 goto out;
1025
Steven Whitehousecd915492006-09-04 12:49:07 -04001026 *eablk = cpu_to_be64((u64)newbh->b_blocknr);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001027 error = ea_write(ip, GFS2_EA_BH2FIRST(newbh), er);
1028 brelse(newbh);
1029 if (error)
1030 goto out;
1031
1032 if (private)
Steven Whitehousecca195c2006-09-05 13:15:18 -04001033 ea_set_remove_stuffed(ip, private);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001034
Steven Whitehousea91ea692006-09-04 12:04:26 -04001035out:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001036 brelse(indbh);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001037 return error;
1038}
1039
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001040static int ea_set_i(struct gfs2_inode *ip, int type, const char *name,
1041 const void *value, size_t size, struct gfs2_ea_location *el)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001042{
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001043 struct gfs2_ea_request er;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001044 struct ea_set es;
1045 unsigned int blks = 2;
1046 int error;
1047
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001048 er.er_type = type;
1049 er.er_name = name;
1050 er.er_data = (void *)value;
1051 er.er_name_len = strlen(name);
1052 er.er_data_len = size;
1053
David Teiglandb3b94fa2006-01-16 16:50:04 +00001054 memset(&es, 0, sizeof(struct ea_set));
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001055 es.es_er = &er;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001056 es.es_el = el;
1057
1058 error = ea_foreach(ip, ea_set_simple, &es);
1059 if (error > 0)
1060 return 0;
1061 if (error)
1062 return error;
1063
Steven Whitehouse383f01f2008-11-04 10:05:22 +00001064 if (!(ip->i_diskflags & GFS2_DIF_EA_INDIRECT))
David Teiglandb3b94fa2006-01-16 16:50:04 +00001065 blks++;
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001066 if (GFS2_EAREQ_SIZE_STUFFED(&er) > GFS2_SB(&ip->i_inode)->sd_jbsize)
1067 blks += DIV_ROUND_UP(er.er_data_len, GFS2_SB(&ip->i_inode)->sd_jbsize);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001068
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001069 return ea_alloc_skeleton(ip, &er, blks, ea_set_block, el);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001070}
1071
1072static int ea_set_remove_unstuffed(struct gfs2_inode *ip,
1073 struct gfs2_ea_location *el)
1074{
1075 if (el->el_prev && GFS2_EA2NEXT(el->el_prev) != el->el_ea) {
1076 el->el_prev = GFS2_EA2NEXT(el->el_prev);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001077 gfs2_assert_withdraw(GFS2_SB(&ip->i_inode),
David Teiglandb3b94fa2006-01-16 16:50:04 +00001078 GFS2_EA2NEXT(el->el_prev) == el->el_ea);
1079 }
1080
Steven Whitehouse86d00632009-09-14 09:50:57 +01001081 return ea_remove_unstuffed(ip, el->el_bh, el->el_ea, el->el_prev, 0);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001082}
1083
David Teiglandb3b94fa2006-01-16 16:50:04 +00001084static int ea_remove_stuffed(struct gfs2_inode *ip, struct gfs2_ea_location *el)
1085{
1086 struct gfs2_ea_header *ea = el->el_ea;
1087 struct gfs2_ea_header *prev = el->el_prev;
1088 struct buffer_head *dibh;
1089 int error;
1090
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001091 error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + RES_EATTR, 0);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001092 if (error)
1093 return error;
1094
Steven Whitehouse350a9b02012-12-14 12:36:02 +00001095 gfs2_trans_add_meta(ip->i_gl, el->el_bh);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001096
1097 if (prev) {
Steven Whitehousecd915492006-09-04 12:49:07 -04001098 u32 len;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001099
1100 len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
1101 prev->ea_rec_len = cpu_to_be32(len);
1102
1103 if (GFS2_EA_IS_LAST(ea))
1104 prev->ea_flags |= GFS2_EAFLAG_LAST;
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001105 } else {
David Teiglandb3b94fa2006-01-16 16:50:04 +00001106 ea->ea_type = GFS2_EATYPE_UNUSED;
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001107 }
David Teiglandb3b94fa2006-01-16 16:50:04 +00001108
1109 error = gfs2_meta_inode_buffer(ip, &dibh);
1110 if (!error) {
Steven Whitehouse4bd91ba2007-06-05 09:39:18 +01001111 ip->i_inode.i_ctime = CURRENT_TIME;
Steven Whitehouse350a9b02012-12-14 12:36:02 +00001112 gfs2_trans_add_meta(ip->i_gl, dibh);
Steven Whitehouse539e5d62006-10-31 15:07:05 -05001113 gfs2_dinode_out(ip, dibh->b_data);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001114 brelse(dibh);
Steven Whitehouse907b9bc2006-09-25 09:26:04 -04001115 }
David Teiglandb3b94fa2006-01-16 16:50:04 +00001116
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001117 gfs2_trans_end(GFS2_SB(&ip->i_inode));
David Teiglandb3b94fa2006-01-16 16:50:04 +00001118
1119 return error;
1120}
1121
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001122/**
1123 * gfs2_xattr_remove - Remove a GFS2 extended attribute
Christoph Hellwig431547b2009-11-13 09:52:56 +00001124 * @ip: The inode
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001125 * @type: The type of the extended attribute
1126 * @name: The name of the extended attribute
1127 *
1128 * This is not called directly by the VFS since we use the (common)
1129 * scheme of making a "set with NULL data" mean a remove request. Note
1130 * that this is different from a set with zero length data.
1131 *
1132 * Returns: 0, or errno on failure
1133 */
1134
Christoph Hellwig431547b2009-11-13 09:52:56 +00001135static int gfs2_xattr_remove(struct gfs2_inode *ip, int type, const char *name)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001136{
1137 struct gfs2_ea_location el;
1138 int error;
1139
Steven Whitehouse3767ac22008-11-03 14:28:42 +00001140 if (!ip->i_eattr)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001141 return -ENODATA;
1142
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001143 error = gfs2_ea_find(ip, type, name, &el);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001144 if (error)
1145 return error;
1146 if (!el.el_ea)
1147 return -ENODATA;
1148
1149 if (GFS2_EA_IS_STUFFED(el.el_ea))
1150 error = ea_remove_stuffed(ip, &el);
1151 else
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001152 error = ea_remove_unstuffed(ip, el.el_bh, el.el_ea, el.el_prev, 0);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001153
1154 brelse(el.el_bh);
1155
1156 return error;
1157}
1158
1159/**
Christoph Hellwig431547b2009-11-13 09:52:56 +00001160 * __gfs2_xattr_set - Set (or remove) a GFS2 extended attribute
1161 * @ip: The inode
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001162 * @name: The name of the extended attribute
1163 * @value: The value of the extended attribute (NULL for remove)
1164 * @size: The size of the @value argument
1165 * @flags: Create or Replace
Christoph Hellwig431547b2009-11-13 09:52:56 +00001166 * @type: The type of the extended attribute
David Teiglandb3b94fa2006-01-16 16:50:04 +00001167 *
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001168 * See gfs2_xattr_remove() for details of the removal of xattrs.
1169 *
1170 * Returns: 0 or errno on failure
David Teiglandb3b94fa2006-01-16 16:50:04 +00001171 */
1172
Christoph Hellwig431547b2009-11-13 09:52:56 +00001173int __gfs2_xattr_set(struct inode *inode, const char *name,
1174 const void *value, size_t size, int flags, int type)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001175{
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001176 struct gfs2_inode *ip = GFS2_I(inode);
Christoph Hellwig431547b2009-11-13 09:52:56 +00001177 struct gfs2_sbd *sdp = GFS2_SB(inode);
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001178 struct gfs2_ea_location el;
1179 unsigned int namel = strlen(name);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001180 int error;
1181
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001182 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
1183 return -EPERM;
1184 if (namel > GFS2_EA_MAX_NAME_LEN)
1185 return -ERANGE;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001186
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001187 if (value == NULL)
Christoph Hellwig431547b2009-11-13 09:52:56 +00001188 return gfs2_xattr_remove(ip, type, name);
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001189
1190 if (ea_check_size(sdp, namel, size))
1191 return -ERANGE;
1192
1193 if (!ip->i_eattr) {
1194 if (flags & XATTR_REPLACE)
1195 return -ENODATA;
1196 return ea_init(ip, type, name, value, size);
1197 }
1198
1199 error = gfs2_ea_find(ip, type, name, &el);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001200 if (error)
1201 return error;
1202
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001203 if (el.el_ea) {
1204 if (ip->i_diskflags & GFS2_DIF_APPENDONLY) {
1205 brelse(el.el_bh);
1206 return -EPERM;
1207 }
David Teiglandb3b94fa2006-01-16 16:50:04 +00001208
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001209 error = -EEXIST;
1210 if (!(flags & XATTR_CREATE)) {
1211 int unstuffed = !GFS2_EA_IS_STUFFED(el.el_ea);
1212 error = ea_set_i(ip, type, name, value, size, &el);
1213 if (!error && unstuffed)
1214 ea_set_remove_unstuffed(ip, &el);
1215 }
1216
1217 brelse(el.el_bh);
1218 return error;
1219 }
1220
1221 error = -ENODATA;
1222 if (!(flags & XATTR_REPLACE))
1223 error = ea_set_i(ip, type, name, value, size, NULL);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001224
1225 return error;
1226}
1227
Christoph Hellwig431547b2009-11-13 09:52:56 +00001228static int gfs2_xattr_set(struct dentry *dentry, const char *name,
1229 const void *value, size_t size, int flags, int type)
1230{
1231 return __gfs2_xattr_set(dentry->d_inode, name, value,
1232 size, flags, type);
1233}
1234
Steven Whitehouse1f981692012-07-26 11:26:36 +01001235
David Teiglandb3b94fa2006-01-16 16:50:04 +00001236static int ea_acl_chmod_unstuffed(struct gfs2_inode *ip,
1237 struct gfs2_ea_header *ea, char *data)
1238{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001239 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001240 unsigned int amount = GFS2_EA_DATA_LEN(ea);
Steven Whitehouse5c676f62006-02-27 17:23:27 -05001241 unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize);
Steven Whitehouse1f981692012-07-26 11:26:36 +01001242 int ret;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001243
Steven Whitehouse1f981692012-07-26 11:26:36 +01001244 ret = gfs2_trans_begin(sdp, nptrs + RES_DINODE, 0);
1245 if (ret)
1246 return ret;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001247
Steven Whitehouse1f981692012-07-26 11:26:36 +01001248 ret = gfs2_iter_unstuffed(ip, ea, data, NULL);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001249 gfs2_trans_end(sdp);
Steven Whitehouse1f981692012-07-26 11:26:36 +01001250
1251 return ret;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001252}
1253
Steven Whitehouse479c4272009-10-02 12:00:00 +01001254int gfs2_xattr_acl_chmod(struct gfs2_inode *ip, struct iattr *attr, char *data)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001255{
Steven Whitehouseab9bbda2011-08-15 14:20:36 +01001256 struct inode *inode = &ip->i_inode;
1257 struct gfs2_sbd *sdp = GFS2_SB(inode);
Steven Whitehouse479c4272009-10-02 12:00:00 +01001258 struct gfs2_ea_location el;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001259 int error;
1260
Steven Whitehouse479c4272009-10-02 12:00:00 +01001261 error = gfs2_ea_find(ip, GFS2_EATYPE_SYS, GFS2_POSIX_ACL_ACCESS, &el);
1262 if (error)
1263 return error;
1264
1265 if (GFS2_EA_IS_STUFFED(el.el_ea)) {
Steven Whitehousee412bdb2009-12-21 13:55:28 +00001266 error = gfs2_trans_begin(sdp, RES_DINODE + RES_EATTR, 0);
1267 if (error == 0) {
Steven Whitehouse350a9b02012-12-14 12:36:02 +00001268 gfs2_trans_add_meta(ip->i_gl, el.el_bh);
Steven Whitehousee412bdb2009-12-21 13:55:28 +00001269 memcpy(GFS2_EA2DATA(el.el_ea), data,
1270 GFS2_EA_DATA_LEN(el.el_ea));
1271 }
1272 } else {
Steven Whitehouse479c4272009-10-02 12:00:00 +01001273 error = ea_acl_chmod_unstuffed(ip, el.el_ea, data);
Steven Whitehousee412bdb2009-12-21 13:55:28 +00001274 }
David Teiglandb3b94fa2006-01-16 16:50:04 +00001275
Steven Whitehousee412bdb2009-12-21 13:55:28 +00001276 brelse(el.el_bh);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001277 if (error)
1278 return error;
1279
Steven Whitehouseab9bbda2011-08-15 14:20:36 +01001280 error = gfs2_setattr_simple(inode, attr);
Steven Whitehousee412bdb2009-12-21 13:55:28 +00001281 gfs2_trans_end(sdp);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001282 return error;
1283}
1284
1285static int ea_dealloc_indirect(struct gfs2_inode *ip)
1286{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001287 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001288 struct gfs2_rgrp_list rlist;
1289 struct buffer_head *indbh, *dibh;
Al Virob44b84d2006-10-14 10:46:30 -04001290 __be64 *eablk, *end;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001291 unsigned int rg_blocks = 0;
Steven Whitehousecd915492006-09-04 12:49:07 -04001292 u64 bstart = 0;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001293 unsigned int blen = 0;
1294 unsigned int blks = 0;
1295 unsigned int x;
1296 int error;
1297
Bob Peterson5e2f7d62012-04-04 22:11:16 -04001298 error = gfs2_rindex_update(sdp);
1299 if (error)
1300 return error;
1301
David Teiglandb3b94fa2006-01-16 16:50:04 +00001302 memset(&rlist, 0, sizeof(struct gfs2_rgrp_list));
1303
Steven Whitehouse3767ac22008-11-03 14:28:42 +00001304 error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT, &indbh);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001305 if (error)
1306 return error;
1307
1308 if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) {
1309 error = -EIO;
1310 goto out;
1311 }
1312
Al Virob44b84d2006-10-14 10:46:30 -04001313 eablk = (__be64 *)(indbh->b_data + sizeof(struct gfs2_meta_header));
David Teiglandb3b94fa2006-01-16 16:50:04 +00001314 end = eablk + sdp->sd_inptrs;
1315
1316 for (; eablk < end; eablk++) {
Steven Whitehousecd915492006-09-04 12:49:07 -04001317 u64 bn;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001318
1319 if (!*eablk)
1320 break;
1321 bn = be64_to_cpu(*eablk);
1322
1323 if (bstart + blen == bn)
1324 blen++;
1325 else {
1326 if (bstart)
Steven Whitehouse70b0c362011-09-02 16:08:09 +01001327 gfs2_rlist_add(ip, &rlist, bstart);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001328 bstart = bn;
1329 blen = 1;
1330 }
1331 blks++;
1332 }
1333 if (bstart)
Steven Whitehouse70b0c362011-09-02 16:08:09 +01001334 gfs2_rlist_add(ip, &rlist, bstart);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001335 else
1336 goto out;
1337
Bob Petersonfe6c9912008-01-28 11:13:02 -06001338 gfs2_rlist_alloc(&rlist, LM_ST_EXCLUSIVE);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001339
1340 for (x = 0; x < rlist.rl_rgrps; x++) {
1341 struct gfs2_rgrpd *rgd;
Steven Whitehouse5c676f62006-02-27 17:23:27 -05001342 rgd = rlist.rl_ghs[x].gh_gl->gl_object;
Steven Whitehousebb8d8a62007-06-01 14:11:58 +01001343 rg_blocks += rgd->rd_length;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001344 }
1345
1346 error = gfs2_glock_nq_m(rlist.rl_rgrps, rlist.rl_ghs);
1347 if (error)
1348 goto out_rlist_free;
1349
Steven Whitehousecca195c2006-09-05 13:15:18 -04001350 error = gfs2_trans_begin(sdp, rg_blocks + RES_DINODE + RES_INDIRECT +
1351 RES_STATFS + RES_QUOTA, blks);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001352 if (error)
1353 goto out_gunlock;
1354
Steven Whitehouse350a9b02012-12-14 12:36:02 +00001355 gfs2_trans_add_meta(ip->i_gl, indbh);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001356
Al Virob44b84d2006-10-14 10:46:30 -04001357 eablk = (__be64 *)(indbh->b_data + sizeof(struct gfs2_meta_header));
David Teiglandb3b94fa2006-01-16 16:50:04 +00001358 bstart = 0;
1359 blen = 0;
1360
1361 for (; eablk < end; eablk++) {
Steven Whitehousecd915492006-09-04 12:49:07 -04001362 u64 bn;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001363
1364 if (!*eablk)
1365 break;
1366 bn = be64_to_cpu(*eablk);
1367
1368 if (bstart + blen == bn)
1369 blen++;
1370 else {
1371 if (bstart)
1372 gfs2_free_meta(ip, bstart, blen);
1373 bstart = bn;
1374 blen = 1;
1375 }
1376
1377 *eablk = 0;
Steven Whitehouse77658aa2008-02-12 14:17:27 +00001378 gfs2_add_inode_blocks(&ip->i_inode, -1);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001379 }
1380 if (bstart)
1381 gfs2_free_meta(ip, bstart, blen);
1382
Steven Whitehouse383f01f2008-11-04 10:05:22 +00001383 ip->i_diskflags &= ~GFS2_DIF_EA_INDIRECT;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001384
1385 error = gfs2_meta_inode_buffer(ip, &dibh);
1386 if (!error) {
Steven Whitehouse350a9b02012-12-14 12:36:02 +00001387 gfs2_trans_add_meta(ip->i_gl, dibh);
Steven Whitehouse539e5d62006-10-31 15:07:05 -05001388 gfs2_dinode_out(ip, dibh->b_data);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001389 brelse(dibh);
1390 }
1391
1392 gfs2_trans_end(sdp);
1393
Steven Whitehousea91ea692006-09-04 12:04:26 -04001394out_gunlock:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001395 gfs2_glock_dq_m(rlist.rl_rgrps, rlist.rl_ghs);
Steven Whitehousea91ea692006-09-04 12:04:26 -04001396out_rlist_free:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001397 gfs2_rlist_free(&rlist);
Steven Whitehousea91ea692006-09-04 12:04:26 -04001398out:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001399 brelse(indbh);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001400 return error;
1401}
1402
1403static int ea_dealloc_block(struct gfs2_inode *ip)
1404{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001405 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001406 struct gfs2_rgrpd *rgd;
1407 struct buffer_head *dibh;
Bob Peterson564e12b2011-11-21 13:36:17 -05001408 struct gfs2_holder gh;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001409 int error;
1410
Bob Peterson5e2f7d62012-04-04 22:11:16 -04001411 error = gfs2_rindex_update(sdp);
1412 if (error)
1413 return error;
1414
Steven Whitehouse66fc0612012-02-08 12:58:32 +00001415 rgd = gfs2_blk2rgrpd(sdp, ip->i_eattr, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001416 if (!rgd) {
1417 gfs2_consist_inode(ip);
1418 return -EIO;
1419 }
1420
Bob Peterson564e12b2011-11-21 13:36:17 -05001421 error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &gh);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001422 if (error)
1423 return error;
1424
Steven Whitehousecca195c2006-09-05 13:15:18 -04001425 error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_DINODE + RES_STATFS +
1426 RES_QUOTA, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001427 if (error)
1428 goto out_gunlock;
1429
Steven Whitehouse3767ac22008-11-03 14:28:42 +00001430 gfs2_free_meta(ip, ip->i_eattr, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001431
Steven Whitehouse3767ac22008-11-03 14:28:42 +00001432 ip->i_eattr = 0;
Steven Whitehouse77658aa2008-02-12 14:17:27 +00001433 gfs2_add_inode_blocks(&ip->i_inode, -1);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001434
1435 error = gfs2_meta_inode_buffer(ip, &dibh);
1436 if (!error) {
Steven Whitehouse350a9b02012-12-14 12:36:02 +00001437 gfs2_trans_add_meta(ip->i_gl, dibh);
Steven Whitehouse539e5d62006-10-31 15:07:05 -05001438 gfs2_dinode_out(ip, dibh->b_data);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001439 brelse(dibh);
1440 }
1441
1442 gfs2_trans_end(sdp);
1443
Steven Whitehousea91ea692006-09-04 12:04:26 -04001444out_gunlock:
Bob Peterson564e12b2011-11-21 13:36:17 -05001445 gfs2_glock_dq_uninit(&gh);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001446 return error;
1447}
1448
1449/**
1450 * gfs2_ea_dealloc - deallocate the extended attribute fork
1451 * @ip: the inode
1452 *
1453 * Returns: errno
1454 */
1455
1456int gfs2_ea_dealloc(struct gfs2_inode *ip)
1457{
David Teiglandb3b94fa2006-01-16 16:50:04 +00001458 int error;
1459
Bob Peterson8e2e0042012-07-19 08:12:40 -04001460 error = gfs2_rindex_update(GFS2_SB(&ip->i_inode));
1461 if (error)
1462 return error;
1463
Eric W. Biedermanf4108a62013-01-31 17:49:26 -08001464 error = gfs2_quota_hold(ip, NO_UID_QUOTA_CHANGE, NO_GID_QUOTA_CHANGE);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001465 if (error)
Bob Peterson5407e242012-05-18 09:28:23 -04001466 return error;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001467
David Teiglandb3b94fa2006-01-16 16:50:04 +00001468 error = ea_foreach(ip, ea_dealloc_unstuffed, NULL);
1469 if (error)
Steven Whitehouse8339ee52011-08-31 16:38:29 +01001470 goto out_quota;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001471
Steven Whitehouse383f01f2008-11-04 10:05:22 +00001472 if (ip->i_diskflags & GFS2_DIF_EA_INDIRECT) {
David Teiglandb3b94fa2006-01-16 16:50:04 +00001473 error = ea_dealloc_indirect(ip);
1474 if (error)
Steven Whitehouse8339ee52011-08-31 16:38:29 +01001475 goto out_quota;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001476 }
1477
1478 error = ea_dealloc_block(ip);
1479
Steven Whitehousea91ea692006-09-04 12:04:26 -04001480out_quota:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001481 gfs2_quota_unhold(ip);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001482 return error;
1483}
1484
Stephen Hemmingerb7bb0a12010-05-13 17:53:23 -07001485static const struct xattr_handler gfs2_xattr_user_handler = {
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001486 .prefix = XATTR_USER_PREFIX,
Christoph Hellwig431547b2009-11-13 09:52:56 +00001487 .flags = GFS2_EATYPE_USR,
1488 .get = gfs2_xattr_get,
1489 .set = gfs2_xattr_set,
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001490};
1491
Stephen Hemmingerb7bb0a12010-05-13 17:53:23 -07001492static const struct xattr_handler gfs2_xattr_security_handler = {
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001493 .prefix = XATTR_SECURITY_PREFIX,
Christoph Hellwig431547b2009-11-13 09:52:56 +00001494 .flags = GFS2_EATYPE_SECURITY,
1495 .get = gfs2_xattr_get,
1496 .set = gfs2_xattr_set,
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001497};
1498
Stephen Hemmingerb7bb0a12010-05-13 17:53:23 -07001499const struct xattr_handler *gfs2_xattr_handlers[] = {
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001500 &gfs2_xattr_user_handler,
1501 &gfs2_xattr_security_handler,
1502 &gfs2_xattr_system_handler,
1503 NULL,
1504};
1505