blob: 71d7bf830c09a44ed22884c75c5ae3f77ec1824d [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
241 if (GFS2_EA_IS_STUFFED(ea))
242 return 0;
243
244 dataptrs = GFS2_EA2DATAPTRS(ea);
Steven Whitehousecca195c2006-09-05 13:15:18 -0400245 for (x = 0; x < ea->ea_num_ptrs; x++, dataptrs++) {
David Teiglandb3b94fa2006-01-16 16:50:04 +0000246 if (*dataptrs) {
247 blks++;
248 bn = be64_to_cpu(*dataptrs);
249 }
Steven Whitehousecca195c2006-09-05 13:15:18 -0400250 }
David Teiglandb3b94fa2006-01-16 16:50:04 +0000251 if (!blks)
252 return 0;
253
254 rgd = gfs2_blk2rgrpd(sdp, bn);
255 if (!rgd) {
256 gfs2_consist_inode(ip);
257 return -EIO;
258 }
259
260 error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &rg_gh);
261 if (error)
262 return error;
263
Steven Whitehousebb8d8a62007-06-01 14:11:58 +0100264 error = gfs2_trans_begin(sdp, rgd->rd_length + RES_DINODE +
Steven Whitehousecca195c2006-09-05 13:15:18 -0400265 RES_EATTR + RES_STATFS + RES_QUOTA, blks);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000266 if (error)
267 goto out_gunlock;
268
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +0000269 gfs2_trans_add_bh(ip->i_gl, bh, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000270
271 dataptrs = GFS2_EA2DATAPTRS(ea);
272 for (x = 0; x < ea->ea_num_ptrs; x++, dataptrs++) {
273 if (!*dataptrs)
274 break;
275 bn = be64_to_cpu(*dataptrs);
276
277 if (bstart + blen == bn)
278 blen++;
279 else {
280 if (bstart)
281 gfs2_free_meta(ip, bstart, blen);
282 bstart = bn;
283 blen = 1;
284 }
285
286 *dataptrs = 0;
Steven Whitehouse77658aa2008-02-12 14:17:27 +0000287 gfs2_add_inode_blocks(&ip->i_inode, -1);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000288 }
289 if (bstart)
290 gfs2_free_meta(ip, bstart, blen);
291
292 if (prev && !leave) {
Steven Whitehousecd915492006-09-04 12:49:07 -0400293 u32 len;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000294
295 len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
296 prev->ea_rec_len = cpu_to_be32(len);
297
298 if (GFS2_EA_IS_LAST(ea))
299 prev->ea_flags |= GFS2_EAFLAG_LAST;
300 } else {
301 ea->ea_type = GFS2_EATYPE_UNUSED;
302 ea->ea_num_ptrs = 0;
303 }
304
305 error = gfs2_meta_inode_buffer(ip, &dibh);
306 if (!error) {
Steven Whitehouse4bd91ba2007-06-05 09:39:18 +0100307 ip->i_inode.i_ctime = CURRENT_TIME;
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +0000308 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
Steven Whitehouse539e5d62006-10-31 15:07:05 -0500309 gfs2_dinode_out(ip, dibh->b_data);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000310 brelse(dibh);
311 }
312
313 gfs2_trans_end(sdp);
314
Steven Whitehousea91ea692006-09-04 12:04:26 -0400315out_gunlock:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000316 gfs2_glock_dq_uninit(&rg_gh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000317 return error;
318}
319
320static int ea_remove_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh,
321 struct gfs2_ea_header *ea,
322 struct gfs2_ea_header *prev, int leave)
323{
324 struct gfs2_alloc *al;
325 int error;
326
327 al = gfs2_alloc_get(ip);
Cyrill Gorcunov182fe5a2008-03-03 21:54:21 +0300328 if (!al)
329 return -ENOMEM;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000330
331 error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
332 if (error)
333 goto out_alloc;
334
Steven Whitehousecca195c2006-09-05 13:15:18 -0400335 error = ea_dealloc_unstuffed(ip, bh, ea, prev, (leave) ? &error : NULL);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000336
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
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100348static inline unsigned int gfs2_ea_strlen(struct gfs2_ea_header *ea)
349{
350 switch (ea->ea_type) {
351 case GFS2_EATYPE_USR:
352 return 5 + ea->ea_name_len + 1;
353 case GFS2_EATYPE_SYS:
354 return 7 + ea->ea_name_len + 1;
355 case GFS2_EATYPE_SECURITY:
356 return 9 + ea->ea_name_len + 1;
357 default:
358 return 0;
359 }
360}
361
David Teiglandb3b94fa2006-01-16 16:50:04 +0000362static int ea_list_i(struct gfs2_inode *ip, struct buffer_head *bh,
363 struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
364 void *private)
365{
366 struct ea_list *ei = private;
367 struct gfs2_ea_request *er = ei->ei_er;
Ryan O'Hara639b6d72006-05-22 10:08:35 -0400368 unsigned int ea_size = gfs2_ea_strlen(ea);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000369
370 if (ea->ea_type == GFS2_EATYPE_UNUSED)
371 return 0;
372
373 if (er->er_data_len) {
Steven Whitehouse01eb7c02006-06-06 17:31:30 -0400374 char *prefix = NULL;
375 unsigned int l = 0;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000376 char c = 0;
377
378 if (ei->ei_size + ea_size > er->er_data_len)
379 return -ERANGE;
380
Ryan O'Hara639b6d72006-05-22 10:08:35 -0400381 switch (ea->ea_type) {
382 case GFS2_EATYPE_USR:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000383 prefix = "user.";
384 l = 5;
Ryan O'Hara639b6d72006-05-22 10:08:35 -0400385 break;
386 case GFS2_EATYPE_SYS:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000387 prefix = "system.";
388 l = 7;
Ryan O'Hara639b6d72006-05-22 10:08:35 -0400389 break;
390 case GFS2_EATYPE_SECURITY:
391 prefix = "security.";
392 l = 9;
393 break;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000394 }
395
Steven Whitehouse01eb7c02006-06-06 17:31:30 -0400396 BUG_ON(l == 0);
397
Steven Whitehouse90cdd202006-05-22 10:36:25 -0400398 memcpy(er->er_data + ei->ei_size, prefix, l);
399 memcpy(er->er_data + ei->ei_size + l, GFS2_EA2NAME(ea),
David Teiglandb3b94fa2006-01-16 16:50:04 +0000400 ea->ea_name_len);
Steven Whitehouse90cdd202006-05-22 10:36:25 -0400401 memcpy(er->er_data + ei->ei_size + ea_size - 1, &c, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000402 }
403
404 ei->ei_size += ea_size;
405
406 return 0;
407}
408
409/**
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100410 * gfs2_listxattr - List gfs2 extended attributes
411 * @dentry: The dentry whose inode we are interested in
412 * @buffer: The buffer to write the results
413 * @size: The size of the buffer
David Teiglandb3b94fa2006-01-16 16:50:04 +0000414 *
415 * Returns: actual size of data on success, -errno on error
416 */
417
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100418ssize_t gfs2_listxattr(struct dentry *dentry, char *buffer, size_t size)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000419{
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100420 struct gfs2_inode *ip = GFS2_I(dentry->d_inode);
421 struct gfs2_ea_request er;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000422 struct gfs2_holder i_gh;
423 int error;
424
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100425 memset(&er, 0, sizeof(struct gfs2_ea_request));
426 if (size) {
427 er.er_data = buffer;
428 er.er_data_len = size;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000429 }
430
Steven Whitehousecca195c2006-09-05 13:15:18 -0400431 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000432 if (error)
433 return error;
434
Steven Whitehouse3767ac22008-11-03 14:28:42 +0000435 if (ip->i_eattr) {
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100436 struct ea_list ei = { .ei_er = &er, .ei_size = 0 };
David Teiglandb3b94fa2006-01-16 16:50:04 +0000437
438 error = ea_foreach(ip, ea_list_i, &ei);
439 if (!error)
440 error = ei.ei_size;
441 }
442
443 gfs2_glock_dq_uninit(&i_gh);
444
445 return error;
446}
447
448/**
449 * ea_get_unstuffed - actually copies the unstuffed data into the
450 * request buffer
Steven Whitehousecca195c2006-09-05 13:15:18 -0400451 * @ip: The GFS2 inode
452 * @ea: The extended attribute header structure
453 * @data: The data to be copied
David Teiglandb3b94fa2006-01-16 16:50:04 +0000454 *
455 * Returns: errno
456 */
457
458static int ea_get_unstuffed(struct gfs2_inode *ip, struct gfs2_ea_header *ea,
459 char *data)
460{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400461 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000462 struct buffer_head **bh;
463 unsigned int amount = GFS2_EA_DATA_LEN(ea);
Steven Whitehouse5c676f62006-02-27 17:23:27 -0500464 unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize);
Al Virob44b84d2006-10-14 10:46:30 -0400465 __be64 *dataptrs = GFS2_EA2DATAPTRS(ea);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000466 unsigned int x;
467 int error = 0;
468
Josef Bacik16c5f062008-04-09 09:33:41 -0400469 bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_NOFS);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000470 if (!bh)
471 return -ENOMEM;
472
473 for (x = 0; x < nptrs; x++) {
Steven Whitehouse7276b3b2006-09-21 17:05:23 -0400474 error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs), 0,
475 bh + x);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000476 if (error) {
477 while (x--)
478 brelse(bh[x]);
479 goto out;
480 }
481 dataptrs++;
482 }
483
484 for (x = 0; x < nptrs; x++) {
Steven Whitehouse7276b3b2006-09-21 17:05:23 -0400485 error = gfs2_meta_wait(sdp, bh[x]);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000486 if (error) {
487 for (; x < nptrs; x++)
488 brelse(bh[x]);
489 goto out;
490 }
491 if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) {
492 for (; x < nptrs; x++)
493 brelse(bh[x]);
494 error = -EIO;
495 goto out;
496 }
497
Steven Whitehousecca195c2006-09-05 13:15:18 -0400498 memcpy(data, bh[x]->b_data + sizeof(struct gfs2_meta_header),
David Teiglandb3b94fa2006-01-16 16:50:04 +0000499 (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize);
500
501 amount -= sdp->sd_jbsize;
502 data += sdp->sd_jbsize;
503
504 brelse(bh[x]);
505 }
506
Steven Whitehousea91ea692006-09-04 12:04:26 -0400507out:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000508 kfree(bh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000509 return error;
510}
511
Steven Whitehouse479c4272009-10-02 12:00:00 +0100512static int gfs2_ea_get_copy(struct gfs2_inode *ip, struct gfs2_ea_location *el,
513 char *data, size_t size)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000514{
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100515 int ret;
516 size_t len = GFS2_EA_DATA_LEN(el->el_ea);
517 if (len > size)
518 return -ERANGE;
519
David Teiglandb3b94fa2006-01-16 16:50:04 +0000520 if (GFS2_EA_IS_STUFFED(el->el_ea)) {
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100521 memcpy(data, GFS2_EA2DATA(el->el_ea), len);
522 return len;
523 }
524 ret = ea_get_unstuffed(ip, el->el_ea, data);
525 if (ret < 0)
526 return ret;
527 return len;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000528}
529
Steven Whitehouse479c4272009-10-02 12:00:00 +0100530int gfs2_xattr_acl_get(struct gfs2_inode *ip, const char *name, char **ppdata)
531{
532 struct gfs2_ea_location el;
533 int error;
534 int len;
535 char *data;
536
537 error = gfs2_ea_find(ip, GFS2_EATYPE_SYS, name, &el);
538 if (error)
539 return error;
540 if (!el.el_ea)
541 goto out;
542 if (!GFS2_EA_DATA_LEN(el.el_ea))
543 goto out;
544
545 len = GFS2_EA_DATA_LEN(el.el_ea);
546 data = kmalloc(len, GFP_NOFS);
547 error = -ENOMEM;
548 if (data == NULL)
549 goto out;
550
551 error = gfs2_ea_get_copy(ip, &el, data, len);
552 if (error == 0)
553 error = len;
554 *ppdata = data;
555out:
556 brelse(el.el_bh);
557 return error;
558}
559
David Teiglandb3b94fa2006-01-16 16:50:04 +0000560/**
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100561 * gfs2_xattr_get - Get a GFS2 extended attribute
562 * @inode: The inode
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100563 * @name: The name of the extended attribute
564 * @buffer: The buffer to write the result into
565 * @size: The size of the buffer
Christoph Hellwig431547b2009-11-13 09:52:56 +0000566 * @type: The type of extended attribute
David Teiglandb3b94fa2006-01-16 16:50:04 +0000567 *
568 * Returns: actual size of data on success, -errno on error
569 */
Christoph Hellwig431547b2009-11-13 09:52:56 +0000570static int gfs2_xattr_get(struct dentry *dentry, const char *name,
571 void *buffer, size_t size, int type)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000572{
Christoph Hellwig431547b2009-11-13 09:52:56 +0000573 struct gfs2_inode *ip = GFS2_I(dentry->d_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000574 struct gfs2_ea_location el;
575 int error;
576
Steven Whitehouse3767ac22008-11-03 14:28:42 +0000577 if (!ip->i_eattr)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000578 return -ENODATA;
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100579 if (strlen(name) > GFS2_EA_MAX_NAME_LEN)
580 return -EINVAL;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000581
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100582 error = gfs2_ea_find(ip, type, name, &el);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000583 if (error)
584 return error;
585 if (!el.el_ea)
586 return -ENODATA;
Steven Whitehouse86d00632009-09-14 09:50:57 +0100587 if (size)
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100588 error = gfs2_ea_get_copy(ip, &el, buffer, size);
589 else
David Teiglandb3b94fa2006-01-16 16:50:04 +0000590 error = GFS2_EA_DATA_LEN(el.el_ea);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000591 brelse(el.el_bh);
592
593 return error;
594}
595
596/**
David Teiglandb3b94fa2006-01-16 16:50:04 +0000597 * ea_alloc_blk - allocates a new block for extended attributes.
598 * @ip: A pointer to the inode that's getting extended attributes
Steven Whitehousecca195c2006-09-05 13:15:18 -0400599 * @bhp: Pointer to pointer to a struct buffer_head
David Teiglandb3b94fa2006-01-16 16:50:04 +0000600 *
601 * Returns: errno
602 */
603
604static int ea_alloc_blk(struct gfs2_inode *ip, struct buffer_head **bhp)
605{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400606 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000607 struct gfs2_ea_header *ea;
Steven Whitehouseb45e41d2008-02-06 10:11:15 +0000608 unsigned int n = 1;
Steven Whitehousecd915492006-09-04 12:49:07 -0400609 u64 block;
Steven Whitehouse09010972009-05-20 10:48:47 +0100610 int error;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000611
Steven Whitehouse09010972009-05-20 10:48:47 +0100612 error = gfs2_alloc_block(ip, &block, &n);
613 if (error)
614 return error;
Steven Whitehouse5731be52008-02-01 13:16:55 +0000615 gfs2_trans_add_unrevoke(sdp, block, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000616 *bhp = gfs2_meta_new(ip->i_gl, block);
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +0000617 gfs2_trans_add_bh(ip->i_gl, *bhp, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000618 gfs2_metatype_set(*bhp, GFS2_METATYPE_EA, GFS2_FORMAT_EA);
619 gfs2_buffer_clear_tail(*bhp, sizeof(struct gfs2_meta_header));
620
621 ea = GFS2_EA_BH2FIRST(*bhp);
622 ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize);
623 ea->ea_type = GFS2_EATYPE_UNUSED;
624 ea->ea_flags = GFS2_EAFLAG_LAST;
625 ea->ea_num_ptrs = 0;
626
Steven Whitehouse77658aa2008-02-12 14:17:27 +0000627 gfs2_add_inode_blocks(&ip->i_inode, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000628
629 return 0;
630}
631
632/**
633 * ea_write - writes the request info to an ea, creating new blocks if
634 * necessary
Steven Whitehousecca195c2006-09-05 13:15:18 -0400635 * @ip: inode that is being modified
636 * @ea: the location of the new ea in a block
David Teiglandb3b94fa2006-01-16 16:50:04 +0000637 * @er: the write request
638 *
639 * Note: does not update ea_rec_len or the GFS2_EAFLAG_LAST bin of ea_flags
640 *
641 * returns : errno
642 */
643
644static int ea_write(struct gfs2_inode *ip, struct gfs2_ea_header *ea,
645 struct gfs2_ea_request *er)
646{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400647 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
Steven Whitehouse09010972009-05-20 10:48:47 +0100648 int error;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000649
650 ea->ea_data_len = cpu_to_be32(er->er_data_len);
651 ea->ea_name_len = er->er_name_len;
652 ea->ea_type = er->er_type;
653 ea->__pad = 0;
654
655 memcpy(GFS2_EA2NAME(ea), er->er_name, er->er_name_len);
656
657 if (GFS2_EAREQ_SIZE_STUFFED(er) <= sdp->sd_jbsize) {
658 ea->ea_num_ptrs = 0;
659 memcpy(GFS2_EA2DATA(ea), er->er_data, er->er_data_len);
660 } else {
Al Virob44b84d2006-10-14 10:46:30 -0400661 __be64 *dataptr = GFS2_EA2DATAPTRS(ea);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000662 const char *data = er->er_data;
663 unsigned int data_len = er->er_data_len;
664 unsigned int copy;
665 unsigned int x;
666
Steven Whitehouse5c676f62006-02-27 17:23:27 -0500667 ea->ea_num_ptrs = DIV_ROUND_UP(er->er_data_len, sdp->sd_jbsize);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000668 for (x = 0; x < ea->ea_num_ptrs; x++) {
669 struct buffer_head *bh;
Steven Whitehousecd915492006-09-04 12:49:07 -0400670 u64 block;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000671 int mh_size = sizeof(struct gfs2_meta_header);
Steven Whitehouseb45e41d2008-02-06 10:11:15 +0000672 unsigned int n = 1;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000673
Steven Whitehouse09010972009-05-20 10:48:47 +0100674 error = gfs2_alloc_block(ip, &block, &n);
675 if (error)
676 return error;
Steven Whitehouse5731be52008-02-01 13:16:55 +0000677 gfs2_trans_add_unrevoke(sdp, block, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000678 bh = gfs2_meta_new(ip->i_gl, block);
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +0000679 gfs2_trans_add_bh(ip->i_gl, bh, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000680 gfs2_metatype_set(bh, GFS2_METATYPE_ED, GFS2_FORMAT_ED);
681
Steven Whitehouse77658aa2008-02-12 14:17:27 +0000682 gfs2_add_inode_blocks(&ip->i_inode, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000683
Steven Whitehousecca195c2006-09-05 13:15:18 -0400684 copy = data_len > sdp->sd_jbsize ? sdp->sd_jbsize :
685 data_len;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000686 memcpy(bh->b_data + mh_size, data, copy);
687 if (copy < sdp->sd_jbsize)
688 memset(bh->b_data + mh_size + copy, 0,
689 sdp->sd_jbsize - copy);
690
Steven Whitehousecca195c2006-09-05 13:15:18 -0400691 *dataptr++ = cpu_to_be64(bh->b_blocknr);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000692 data += copy;
693 data_len -= copy;
694
695 brelse(bh);
696 }
697
698 gfs2_assert_withdraw(sdp, !data_len);
699 }
700
701 return 0;
702}
703
704typedef int (*ea_skeleton_call_t) (struct gfs2_inode *ip,
Steven Whitehousecca195c2006-09-05 13:15:18 -0400705 struct gfs2_ea_request *er, void *private);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000706
707static int ea_alloc_skeleton(struct gfs2_inode *ip, struct gfs2_ea_request *er,
708 unsigned int blks,
Steven Whitehousecca195c2006-09-05 13:15:18 -0400709 ea_skeleton_call_t skeleton_call, void *private)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000710{
711 struct gfs2_alloc *al;
712 struct buffer_head *dibh;
713 int error;
714
715 al = gfs2_alloc_get(ip);
Cyrill Gorcunov182fe5a2008-03-03 21:54:21 +0300716 if (!al)
717 return -ENOMEM;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000718
Steven Whitehoused82661d2008-03-10 15:34:50 +0000719 error = gfs2_quota_lock_check(ip);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000720 if (error)
721 goto out;
722
David Teiglandb3b94fa2006-01-16 16:50:04 +0000723 al->al_requested = blks;
724
725 error = gfs2_inplace_reserve(ip);
726 if (error)
727 goto out_gunlock_q;
728
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400729 error = gfs2_trans_begin(GFS2_SB(&ip->i_inode),
Steven Whitehouse54335b12011-09-01 13:31:59 +0100730 blks + gfs2_rg_blocks(ip) +
David Teiglandb3b94fa2006-01-16 16:50:04 +0000731 RES_DINODE + RES_STATFS + RES_QUOTA, 0);
732 if (error)
733 goto out_ipres;
734
735 error = skeleton_call(ip, er, private);
736 if (error)
737 goto out_end_trans;
738
739 error = gfs2_meta_inode_buffer(ip, &dibh);
740 if (!error) {
Steven Whitehouse4bd91ba2007-06-05 09:39:18 +0100741 ip->i_inode.i_ctime = CURRENT_TIME;
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +0000742 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
Steven Whitehouse539e5d62006-10-31 15:07:05 -0500743 gfs2_dinode_out(ip, dibh->b_data);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000744 brelse(dibh);
745 }
746
Steven Whitehousea91ea692006-09-04 12:04:26 -0400747out_end_trans:
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400748 gfs2_trans_end(GFS2_SB(&ip->i_inode));
Steven Whitehousea91ea692006-09-04 12:04:26 -0400749out_ipres:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000750 gfs2_inplace_release(ip);
Steven Whitehousea91ea692006-09-04 12:04:26 -0400751out_gunlock_q:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000752 gfs2_quota_unlock(ip);
Steven Whitehousea91ea692006-09-04 12:04:26 -0400753out:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000754 gfs2_alloc_put(ip);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000755 return error;
756}
757
758static int ea_init_i(struct gfs2_inode *ip, struct gfs2_ea_request *er,
759 void *private)
760{
761 struct buffer_head *bh;
762 int error;
763
764 error = ea_alloc_blk(ip, &bh);
765 if (error)
766 return error;
767
Steven Whitehouse3767ac22008-11-03 14:28:42 +0000768 ip->i_eattr = bh->b_blocknr;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000769 error = ea_write(ip, GFS2_EA_BH2FIRST(bh), er);
770
771 brelse(bh);
772
773 return error;
774}
775
776/**
777 * ea_init - initializes a new eattr block
778 * @ip:
779 * @er:
780 *
781 * Returns: errno
782 */
783
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100784static int ea_init(struct gfs2_inode *ip, int type, const char *name,
785 const void *data, size_t size)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000786{
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100787 struct gfs2_ea_request er;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400788 unsigned int jbsize = GFS2_SB(&ip->i_inode)->sd_jbsize;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000789 unsigned int blks = 1;
790
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100791 er.er_type = type;
792 er.er_name = name;
793 er.er_name_len = strlen(name);
794 er.er_data = (void *)data;
795 er.er_data_len = size;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000796
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100797 if (GFS2_EAREQ_SIZE_STUFFED(&er) > jbsize)
798 blks += DIV_ROUND_UP(er.er_data_len, jbsize);
799
800 return ea_alloc_skeleton(ip, &er, blks, ea_init_i, NULL);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000801}
802
803static struct gfs2_ea_header *ea_split_ea(struct gfs2_ea_header *ea)
804{
Steven Whitehousecd915492006-09-04 12:49:07 -0400805 u32 ea_size = GFS2_EA_SIZE(ea);
Steven Whitehouse568f4c92006-02-27 12:00:42 -0500806 struct gfs2_ea_header *new = (struct gfs2_ea_header *)((char *)ea +
807 ea_size);
Steven Whitehousecd915492006-09-04 12:49:07 -0400808 u32 new_size = GFS2_EA_REC_LEN(ea) - ea_size;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000809 int last = ea->ea_flags & GFS2_EAFLAG_LAST;
810
811 ea->ea_rec_len = cpu_to_be32(ea_size);
812 ea->ea_flags ^= last;
813
814 new->ea_rec_len = cpu_to_be32(new_size);
815 new->ea_flags = last;
816
817 return new;
818}
819
820static void ea_set_remove_stuffed(struct gfs2_inode *ip,
821 struct gfs2_ea_location *el)
822{
823 struct gfs2_ea_header *ea = el->el_ea;
824 struct gfs2_ea_header *prev = el->el_prev;
Steven Whitehousecd915492006-09-04 12:49:07 -0400825 u32 len;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000826
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +0000827 gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000828
829 if (!prev || !GFS2_EA_IS_STUFFED(ea)) {
830 ea->ea_type = GFS2_EATYPE_UNUSED;
831 return;
832 } else if (GFS2_EA2NEXT(prev) != ea) {
833 prev = GFS2_EA2NEXT(prev);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400834 gfs2_assert_withdraw(GFS2_SB(&ip->i_inode), GFS2_EA2NEXT(prev) == ea);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000835 }
836
837 len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
838 prev->ea_rec_len = cpu_to_be32(len);
839
840 if (GFS2_EA_IS_LAST(ea))
841 prev->ea_flags |= GFS2_EAFLAG_LAST;
842}
843
844struct ea_set {
845 int ea_split;
846
847 struct gfs2_ea_request *es_er;
848 struct gfs2_ea_location *es_el;
849
850 struct buffer_head *es_bh;
851 struct gfs2_ea_header *es_ea;
852};
853
854static int ea_set_simple_noalloc(struct gfs2_inode *ip, struct buffer_head *bh,
855 struct gfs2_ea_header *ea, struct ea_set *es)
856{
857 struct gfs2_ea_request *er = es->es_er;
858 struct buffer_head *dibh;
859 int error;
860
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400861 error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + 2 * RES_EATTR, 0);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000862 if (error)
863 return error;
864
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +0000865 gfs2_trans_add_bh(ip->i_gl, bh, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000866
867 if (es->ea_split)
868 ea = ea_split_ea(ea);
869
870 ea_write(ip, ea, er);
871
872 if (es->es_el)
873 ea_set_remove_stuffed(ip, es->es_el);
874
875 error = gfs2_meta_inode_buffer(ip, &dibh);
876 if (error)
877 goto out;
Steven Whitehouse4bd91ba2007-06-05 09:39:18 +0100878 ip->i_inode.i_ctime = CURRENT_TIME;
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +0000879 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
Steven Whitehouse539e5d62006-10-31 15:07:05 -0500880 gfs2_dinode_out(ip, dibh->b_data);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000881 brelse(dibh);
Steven Whitehousea91ea692006-09-04 12:04:26 -0400882out:
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400883 gfs2_trans_end(GFS2_SB(&ip->i_inode));
David Teiglandb3b94fa2006-01-16 16:50:04 +0000884 return error;
885}
886
887static int ea_set_simple_alloc(struct gfs2_inode *ip,
888 struct gfs2_ea_request *er, void *private)
889{
890 struct ea_set *es = private;
891 struct gfs2_ea_header *ea = es->es_ea;
892 int error;
893
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +0000894 gfs2_trans_add_bh(ip->i_gl, es->es_bh, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000895
896 if (es->ea_split)
897 ea = ea_split_ea(ea);
898
899 error = ea_write(ip, ea, er);
900 if (error)
901 return error;
902
903 if (es->es_el)
904 ea_set_remove_stuffed(ip, es->es_el);
905
906 return 0;
907}
908
909static int ea_set_simple(struct gfs2_inode *ip, struct buffer_head *bh,
910 struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
911 void *private)
912{
913 struct ea_set *es = private;
914 unsigned int size;
915 int stuffed;
916 int error;
917
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100918 stuffed = ea_calc_size(GFS2_SB(&ip->i_inode), es->es_er->er_name_len,
919 es->es_er->er_data_len, &size);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000920
921 if (ea->ea_type == GFS2_EATYPE_UNUSED) {
922 if (GFS2_EA_REC_LEN(ea) < size)
923 return 0;
924 if (!GFS2_EA_IS_STUFFED(ea)) {
925 error = ea_remove_unstuffed(ip, bh, ea, prev, 1);
926 if (error)
927 return error;
928 }
929 es->ea_split = 0;
930 } else if (GFS2_EA_REC_LEN(ea) - GFS2_EA_SIZE(ea) >= size)
931 es->ea_split = 1;
932 else
933 return 0;
934
935 if (stuffed) {
936 error = ea_set_simple_noalloc(ip, bh, ea, es);
937 if (error)
938 return error;
939 } else {
940 unsigned int blks;
941
942 es->es_bh = bh;
943 es->es_ea = ea;
Steven Whitehouse5c676f62006-02-27 17:23:27 -0500944 blks = 2 + DIV_ROUND_UP(es->es_er->er_data_len,
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400945 GFS2_SB(&ip->i_inode)->sd_jbsize);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000946
947 error = ea_alloc_skeleton(ip, es->es_er, blks,
948 ea_set_simple_alloc, es);
949 if (error)
950 return error;
951 }
952
953 return 1;
954}
955
956static int ea_set_block(struct gfs2_inode *ip, struct gfs2_ea_request *er,
957 void *private)
958{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400959 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000960 struct buffer_head *indbh, *newbh;
Al Virob44b84d2006-10-14 10:46:30 -0400961 __be64 *eablk;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000962 int error;
963 int mh_size = sizeof(struct gfs2_meta_header);
964
Steven Whitehouse383f01f2008-11-04 10:05:22 +0000965 if (ip->i_diskflags & GFS2_DIF_EA_INDIRECT) {
Al Virob44b84d2006-10-14 10:46:30 -0400966 __be64 *end;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000967
Steven Whitehouse3767ac22008-11-03 14:28:42 +0000968 error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT,
Steven Whitehouse7276b3b2006-09-21 17:05:23 -0400969 &indbh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000970 if (error)
971 return error;
972
973 if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) {
974 error = -EIO;
975 goto out;
976 }
977
Al Virob44b84d2006-10-14 10:46:30 -0400978 eablk = (__be64 *)(indbh->b_data + mh_size);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000979 end = eablk + sdp->sd_inptrs;
980
981 for (; eablk < end; eablk++)
982 if (!*eablk)
983 break;
984
985 if (eablk == end) {
986 error = -ENOSPC;
987 goto out;
988 }
989
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +0000990 gfs2_trans_add_bh(ip->i_gl, indbh, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000991 } else {
Steven Whitehousecd915492006-09-04 12:49:07 -0400992 u64 blk;
Steven Whitehouseb45e41d2008-02-06 10:11:15 +0000993 unsigned int n = 1;
Steven Whitehouse09010972009-05-20 10:48:47 +0100994 error = gfs2_alloc_block(ip, &blk, &n);
995 if (error)
996 return error;
Steven Whitehouse5731be52008-02-01 13:16:55 +0000997 gfs2_trans_add_unrevoke(sdp, blk, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000998 indbh = gfs2_meta_new(ip->i_gl, blk);
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +0000999 gfs2_trans_add_bh(ip->i_gl, indbh, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001000 gfs2_metatype_set(indbh, GFS2_METATYPE_IN, GFS2_FORMAT_IN);
1001 gfs2_buffer_clear_tail(indbh, mh_size);
1002
Al Virob44b84d2006-10-14 10:46:30 -04001003 eablk = (__be64 *)(indbh->b_data + mh_size);
Steven Whitehouse3767ac22008-11-03 14:28:42 +00001004 *eablk = cpu_to_be64(ip->i_eattr);
1005 ip->i_eattr = blk;
Steven Whitehouse383f01f2008-11-04 10:05:22 +00001006 ip->i_diskflags |= GFS2_DIF_EA_INDIRECT;
Steven Whitehouse77658aa2008-02-12 14:17:27 +00001007 gfs2_add_inode_blocks(&ip->i_inode, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001008
1009 eablk++;
1010 }
1011
1012 error = ea_alloc_blk(ip, &newbh);
1013 if (error)
1014 goto out;
1015
Steven Whitehousecd915492006-09-04 12:49:07 -04001016 *eablk = cpu_to_be64((u64)newbh->b_blocknr);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001017 error = ea_write(ip, GFS2_EA_BH2FIRST(newbh), er);
1018 brelse(newbh);
1019 if (error)
1020 goto out;
1021
1022 if (private)
Steven Whitehousecca195c2006-09-05 13:15:18 -04001023 ea_set_remove_stuffed(ip, private);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001024
Steven Whitehousea91ea692006-09-04 12:04:26 -04001025out:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001026 brelse(indbh);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001027 return error;
1028}
1029
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001030static int ea_set_i(struct gfs2_inode *ip, int type, const char *name,
1031 const void *value, size_t size, struct gfs2_ea_location *el)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001032{
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001033 struct gfs2_ea_request er;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001034 struct ea_set es;
1035 unsigned int blks = 2;
1036 int error;
1037
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001038 er.er_type = type;
1039 er.er_name = name;
1040 er.er_data = (void *)value;
1041 er.er_name_len = strlen(name);
1042 er.er_data_len = size;
1043
David Teiglandb3b94fa2006-01-16 16:50:04 +00001044 memset(&es, 0, sizeof(struct ea_set));
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001045 es.es_er = &er;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001046 es.es_el = el;
1047
1048 error = ea_foreach(ip, ea_set_simple, &es);
1049 if (error > 0)
1050 return 0;
1051 if (error)
1052 return error;
1053
Steven Whitehouse383f01f2008-11-04 10:05:22 +00001054 if (!(ip->i_diskflags & GFS2_DIF_EA_INDIRECT))
David Teiglandb3b94fa2006-01-16 16:50:04 +00001055 blks++;
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001056 if (GFS2_EAREQ_SIZE_STUFFED(&er) > GFS2_SB(&ip->i_inode)->sd_jbsize)
1057 blks += DIV_ROUND_UP(er.er_data_len, GFS2_SB(&ip->i_inode)->sd_jbsize);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001058
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001059 return ea_alloc_skeleton(ip, &er, blks, ea_set_block, el);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001060}
1061
1062static int ea_set_remove_unstuffed(struct gfs2_inode *ip,
1063 struct gfs2_ea_location *el)
1064{
1065 if (el->el_prev && GFS2_EA2NEXT(el->el_prev) != el->el_ea) {
1066 el->el_prev = GFS2_EA2NEXT(el->el_prev);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001067 gfs2_assert_withdraw(GFS2_SB(&ip->i_inode),
David Teiglandb3b94fa2006-01-16 16:50:04 +00001068 GFS2_EA2NEXT(el->el_prev) == el->el_ea);
1069 }
1070
Steven Whitehouse86d00632009-09-14 09:50:57 +01001071 return ea_remove_unstuffed(ip, el->el_bh, el->el_ea, el->el_prev, 0);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001072}
1073
David Teiglandb3b94fa2006-01-16 16:50:04 +00001074static int ea_remove_stuffed(struct gfs2_inode *ip, struct gfs2_ea_location *el)
1075{
1076 struct gfs2_ea_header *ea = el->el_ea;
1077 struct gfs2_ea_header *prev = el->el_prev;
1078 struct buffer_head *dibh;
1079 int error;
1080
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001081 error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + RES_EATTR, 0);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001082 if (error)
1083 return error;
1084
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +00001085 gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001086
1087 if (prev) {
Steven Whitehousecd915492006-09-04 12:49:07 -04001088 u32 len;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001089
1090 len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
1091 prev->ea_rec_len = cpu_to_be32(len);
1092
1093 if (GFS2_EA_IS_LAST(ea))
1094 prev->ea_flags |= GFS2_EAFLAG_LAST;
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001095 } else {
David Teiglandb3b94fa2006-01-16 16:50:04 +00001096 ea->ea_type = GFS2_EATYPE_UNUSED;
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001097 }
David Teiglandb3b94fa2006-01-16 16:50:04 +00001098
1099 error = gfs2_meta_inode_buffer(ip, &dibh);
1100 if (!error) {
Steven Whitehouse4bd91ba2007-06-05 09:39:18 +01001101 ip->i_inode.i_ctime = CURRENT_TIME;
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +00001102 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
Steven Whitehouse539e5d62006-10-31 15:07:05 -05001103 gfs2_dinode_out(ip, dibh->b_data);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001104 brelse(dibh);
Steven Whitehouse907b9bc2006-09-25 09:26:04 -04001105 }
David Teiglandb3b94fa2006-01-16 16:50:04 +00001106
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001107 gfs2_trans_end(GFS2_SB(&ip->i_inode));
David Teiglandb3b94fa2006-01-16 16:50:04 +00001108
1109 return error;
1110}
1111
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001112/**
1113 * gfs2_xattr_remove - Remove a GFS2 extended attribute
Christoph Hellwig431547b2009-11-13 09:52:56 +00001114 * @ip: The inode
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001115 * @type: The type of the extended attribute
1116 * @name: The name of the extended attribute
1117 *
1118 * This is not called directly by the VFS since we use the (common)
1119 * scheme of making a "set with NULL data" mean a remove request. Note
1120 * that this is different from a set with zero length data.
1121 *
1122 * Returns: 0, or errno on failure
1123 */
1124
Christoph Hellwig431547b2009-11-13 09:52:56 +00001125static int gfs2_xattr_remove(struct gfs2_inode *ip, int type, const char *name)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001126{
1127 struct gfs2_ea_location el;
1128 int error;
1129
Steven Whitehouse3767ac22008-11-03 14:28:42 +00001130 if (!ip->i_eattr)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001131 return -ENODATA;
1132
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001133 error = gfs2_ea_find(ip, type, name, &el);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001134 if (error)
1135 return error;
1136 if (!el.el_ea)
1137 return -ENODATA;
1138
1139 if (GFS2_EA_IS_STUFFED(el.el_ea))
1140 error = ea_remove_stuffed(ip, &el);
1141 else
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001142 error = ea_remove_unstuffed(ip, el.el_bh, el.el_ea, el.el_prev, 0);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001143
1144 brelse(el.el_bh);
1145
1146 return error;
1147}
1148
1149/**
Christoph Hellwig431547b2009-11-13 09:52:56 +00001150 * __gfs2_xattr_set - Set (or remove) a GFS2 extended attribute
1151 * @ip: The inode
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001152 * @name: The name of the extended attribute
1153 * @value: The value of the extended attribute (NULL for remove)
1154 * @size: The size of the @value argument
1155 * @flags: Create or Replace
Christoph Hellwig431547b2009-11-13 09:52:56 +00001156 * @type: The type of the extended attribute
David Teiglandb3b94fa2006-01-16 16:50:04 +00001157 *
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001158 * See gfs2_xattr_remove() for details of the removal of xattrs.
1159 *
1160 * Returns: 0 or errno on failure
David Teiglandb3b94fa2006-01-16 16:50:04 +00001161 */
1162
Christoph Hellwig431547b2009-11-13 09:52:56 +00001163int __gfs2_xattr_set(struct inode *inode, const char *name,
1164 const void *value, size_t size, int flags, int type)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001165{
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001166 struct gfs2_inode *ip = GFS2_I(inode);
Christoph Hellwig431547b2009-11-13 09:52:56 +00001167 struct gfs2_sbd *sdp = GFS2_SB(inode);
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001168 struct gfs2_ea_location el;
1169 unsigned int namel = strlen(name);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001170 int error;
1171
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001172 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
1173 return -EPERM;
1174 if (namel > GFS2_EA_MAX_NAME_LEN)
1175 return -ERANGE;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001176
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001177 if (value == NULL)
Christoph Hellwig431547b2009-11-13 09:52:56 +00001178 return gfs2_xattr_remove(ip, type, name);
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001179
1180 if (ea_check_size(sdp, namel, size))
1181 return -ERANGE;
1182
1183 if (!ip->i_eattr) {
1184 if (flags & XATTR_REPLACE)
1185 return -ENODATA;
1186 return ea_init(ip, type, name, value, size);
1187 }
1188
1189 error = gfs2_ea_find(ip, type, name, &el);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001190 if (error)
1191 return error;
1192
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001193 if (el.el_ea) {
1194 if (ip->i_diskflags & GFS2_DIF_APPENDONLY) {
1195 brelse(el.el_bh);
1196 return -EPERM;
1197 }
David Teiglandb3b94fa2006-01-16 16:50:04 +00001198
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001199 error = -EEXIST;
1200 if (!(flags & XATTR_CREATE)) {
1201 int unstuffed = !GFS2_EA_IS_STUFFED(el.el_ea);
1202 error = ea_set_i(ip, type, name, value, size, &el);
1203 if (!error && unstuffed)
1204 ea_set_remove_unstuffed(ip, &el);
1205 }
1206
1207 brelse(el.el_bh);
1208 return error;
1209 }
1210
1211 error = -ENODATA;
1212 if (!(flags & XATTR_REPLACE))
1213 error = ea_set_i(ip, type, name, value, size, NULL);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001214
1215 return error;
1216}
1217
Christoph Hellwig431547b2009-11-13 09:52:56 +00001218static int gfs2_xattr_set(struct dentry *dentry, const char *name,
1219 const void *value, size_t size, int flags, int type)
1220{
1221 return __gfs2_xattr_set(dentry->d_inode, name, value,
1222 size, flags, type);
1223}
1224
David Teiglandb3b94fa2006-01-16 16:50:04 +00001225static int ea_acl_chmod_unstuffed(struct gfs2_inode *ip,
1226 struct gfs2_ea_header *ea, char *data)
1227{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001228 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001229 struct buffer_head **bh;
1230 unsigned int amount = GFS2_EA_DATA_LEN(ea);
Steven Whitehouse5c676f62006-02-27 17:23:27 -05001231 unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize);
Al Virob44b84d2006-10-14 10:46:30 -04001232 __be64 *dataptrs = GFS2_EA2DATAPTRS(ea);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001233 unsigned int x;
1234 int error;
1235
Josef Bacik16c5f062008-04-09 09:33:41 -04001236 bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_NOFS);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001237 if (!bh)
1238 return -ENOMEM;
1239
1240 error = gfs2_trans_begin(sdp, nptrs + RES_DINODE, 0);
1241 if (error)
1242 goto out;
1243
1244 for (x = 0; x < nptrs; x++) {
Steven Whitehouse7276b3b2006-09-21 17:05:23 -04001245 error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs), 0,
1246 bh + x);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001247 if (error) {
1248 while (x--)
1249 brelse(bh[x]);
1250 goto fail;
1251 }
1252 dataptrs++;
1253 }
1254
1255 for (x = 0; x < nptrs; x++) {
Steven Whitehouse7276b3b2006-09-21 17:05:23 -04001256 error = gfs2_meta_wait(sdp, bh[x]);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001257 if (error) {
1258 for (; x < nptrs; x++)
1259 brelse(bh[x]);
1260 goto fail;
1261 }
1262 if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) {
1263 for (; x < nptrs; x++)
1264 brelse(bh[x]);
1265 error = -EIO;
1266 goto fail;
1267 }
1268
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +00001269 gfs2_trans_add_bh(ip->i_gl, bh[x], 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001270
Steven Whitehousecca195c2006-09-05 13:15:18 -04001271 memcpy(bh[x]->b_data + sizeof(struct gfs2_meta_header), data,
David Teiglandb3b94fa2006-01-16 16:50:04 +00001272 (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize);
1273
1274 amount -= sdp->sd_jbsize;
1275 data += sdp->sd_jbsize;
1276
1277 brelse(bh[x]);
1278 }
1279
Steven Whitehousea91ea692006-09-04 12:04:26 -04001280out:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001281 kfree(bh);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001282 return error;
1283
Steven Whitehousea91ea692006-09-04 12:04:26 -04001284fail:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001285 gfs2_trans_end(sdp);
1286 kfree(bh);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001287 return error;
1288}
1289
Steven Whitehouse479c4272009-10-02 12:00:00 +01001290int gfs2_xattr_acl_chmod(struct gfs2_inode *ip, struct iattr *attr, char *data)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001291{
Steven Whitehouseab9bbda2011-08-15 14:20:36 +01001292 struct inode *inode = &ip->i_inode;
1293 struct gfs2_sbd *sdp = GFS2_SB(inode);
Steven Whitehouse479c4272009-10-02 12:00:00 +01001294 struct gfs2_ea_location el;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001295 int error;
1296
Steven Whitehouse479c4272009-10-02 12:00:00 +01001297 error = gfs2_ea_find(ip, GFS2_EATYPE_SYS, GFS2_POSIX_ACL_ACCESS, &el);
1298 if (error)
1299 return error;
1300
1301 if (GFS2_EA_IS_STUFFED(el.el_ea)) {
Steven Whitehousee412bdb2009-12-21 13:55:28 +00001302 error = gfs2_trans_begin(sdp, RES_DINODE + RES_EATTR, 0);
1303 if (error == 0) {
1304 gfs2_trans_add_bh(ip->i_gl, el.el_bh, 1);
1305 memcpy(GFS2_EA2DATA(el.el_ea), data,
1306 GFS2_EA_DATA_LEN(el.el_ea));
1307 }
1308 } else {
Steven Whitehouse479c4272009-10-02 12:00:00 +01001309 error = ea_acl_chmod_unstuffed(ip, el.el_ea, data);
Steven Whitehousee412bdb2009-12-21 13:55:28 +00001310 }
David Teiglandb3b94fa2006-01-16 16:50:04 +00001311
Steven Whitehousee412bdb2009-12-21 13:55:28 +00001312 brelse(el.el_bh);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001313 if (error)
1314 return error;
1315
Steven Whitehouseab9bbda2011-08-15 14:20:36 +01001316 error = gfs2_setattr_simple(inode, attr);
Steven Whitehousee412bdb2009-12-21 13:55:28 +00001317 gfs2_trans_end(sdp);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001318 return error;
1319}
1320
1321static int ea_dealloc_indirect(struct gfs2_inode *ip)
1322{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001323 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001324 struct gfs2_rgrp_list rlist;
1325 struct buffer_head *indbh, *dibh;
Al Virob44b84d2006-10-14 10:46:30 -04001326 __be64 *eablk, *end;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001327 unsigned int rg_blocks = 0;
Steven Whitehousecd915492006-09-04 12:49:07 -04001328 u64 bstart = 0;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001329 unsigned int blen = 0;
1330 unsigned int blks = 0;
1331 unsigned int x;
1332 int error;
1333
1334 memset(&rlist, 0, sizeof(struct gfs2_rgrp_list));
1335
Steven Whitehouse3767ac22008-11-03 14:28:42 +00001336 error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT, &indbh);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001337 if (error)
1338 return error;
1339
1340 if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) {
1341 error = -EIO;
1342 goto out;
1343 }
1344
Al Virob44b84d2006-10-14 10:46:30 -04001345 eablk = (__be64 *)(indbh->b_data + sizeof(struct gfs2_meta_header));
David Teiglandb3b94fa2006-01-16 16:50:04 +00001346 end = eablk + sdp->sd_inptrs;
1347
1348 for (; eablk < end; eablk++) {
Steven Whitehousecd915492006-09-04 12:49:07 -04001349 u64 bn;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001350
1351 if (!*eablk)
1352 break;
1353 bn = be64_to_cpu(*eablk);
1354
1355 if (bstart + blen == bn)
1356 blen++;
1357 else {
1358 if (bstart)
Steven Whitehouse70b0c362011-09-02 16:08:09 +01001359 gfs2_rlist_add(ip, &rlist, bstart);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001360 bstart = bn;
1361 blen = 1;
1362 }
1363 blks++;
1364 }
1365 if (bstart)
Steven Whitehouse70b0c362011-09-02 16:08:09 +01001366 gfs2_rlist_add(ip, &rlist, bstart);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001367 else
1368 goto out;
1369
Bob Petersonfe6c9912008-01-28 11:13:02 -06001370 gfs2_rlist_alloc(&rlist, LM_ST_EXCLUSIVE);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001371
1372 for (x = 0; x < rlist.rl_rgrps; x++) {
1373 struct gfs2_rgrpd *rgd;
Steven Whitehouse5c676f62006-02-27 17:23:27 -05001374 rgd = rlist.rl_ghs[x].gh_gl->gl_object;
Steven Whitehousebb8d8a62007-06-01 14:11:58 +01001375 rg_blocks += rgd->rd_length;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001376 }
1377
1378 error = gfs2_glock_nq_m(rlist.rl_rgrps, rlist.rl_ghs);
1379 if (error)
1380 goto out_rlist_free;
1381
Steven Whitehousecca195c2006-09-05 13:15:18 -04001382 error = gfs2_trans_begin(sdp, rg_blocks + RES_DINODE + RES_INDIRECT +
1383 RES_STATFS + RES_QUOTA, blks);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001384 if (error)
1385 goto out_gunlock;
1386
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +00001387 gfs2_trans_add_bh(ip->i_gl, indbh, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001388
Al Virob44b84d2006-10-14 10:46:30 -04001389 eablk = (__be64 *)(indbh->b_data + sizeof(struct gfs2_meta_header));
David Teiglandb3b94fa2006-01-16 16:50:04 +00001390 bstart = 0;
1391 blen = 0;
1392
1393 for (; eablk < end; eablk++) {
Steven Whitehousecd915492006-09-04 12:49:07 -04001394 u64 bn;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001395
1396 if (!*eablk)
1397 break;
1398 bn = be64_to_cpu(*eablk);
1399
1400 if (bstart + blen == bn)
1401 blen++;
1402 else {
1403 if (bstart)
1404 gfs2_free_meta(ip, bstart, blen);
1405 bstart = bn;
1406 blen = 1;
1407 }
1408
1409 *eablk = 0;
Steven Whitehouse77658aa2008-02-12 14:17:27 +00001410 gfs2_add_inode_blocks(&ip->i_inode, -1);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001411 }
1412 if (bstart)
1413 gfs2_free_meta(ip, bstart, blen);
1414
Steven Whitehouse383f01f2008-11-04 10:05:22 +00001415 ip->i_diskflags &= ~GFS2_DIF_EA_INDIRECT;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001416
1417 error = gfs2_meta_inode_buffer(ip, &dibh);
1418 if (!error) {
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +00001419 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
Steven Whitehouse539e5d62006-10-31 15:07:05 -05001420 gfs2_dinode_out(ip, dibh->b_data);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001421 brelse(dibh);
1422 }
1423
1424 gfs2_trans_end(sdp);
1425
Steven Whitehousea91ea692006-09-04 12:04:26 -04001426out_gunlock:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001427 gfs2_glock_dq_m(rlist.rl_rgrps, rlist.rl_ghs);
Steven Whitehousea91ea692006-09-04 12:04:26 -04001428out_rlist_free:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001429 gfs2_rlist_free(&rlist);
Steven Whitehousea91ea692006-09-04 12:04:26 -04001430out:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001431 brelse(indbh);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001432 return error;
1433}
1434
1435static int ea_dealloc_block(struct gfs2_inode *ip)
1436{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001437 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
Steven Whitehouse6dbd8222008-01-10 15:18:55 +00001438 struct gfs2_alloc *al = ip->i_alloc;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001439 struct gfs2_rgrpd *rgd;
1440 struct buffer_head *dibh;
1441 int error;
1442
Steven Whitehouse3767ac22008-11-03 14:28:42 +00001443 rgd = gfs2_blk2rgrpd(sdp, ip->i_eattr);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001444 if (!rgd) {
1445 gfs2_consist_inode(ip);
1446 return -EIO;
1447 }
1448
1449 error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0,
1450 &al->al_rgd_gh);
1451 if (error)
1452 return error;
1453
Steven Whitehousecca195c2006-09-05 13:15:18 -04001454 error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_DINODE + RES_STATFS +
1455 RES_QUOTA, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001456 if (error)
1457 goto out_gunlock;
1458
Steven Whitehouse3767ac22008-11-03 14:28:42 +00001459 gfs2_free_meta(ip, ip->i_eattr, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001460
Steven Whitehouse3767ac22008-11-03 14:28:42 +00001461 ip->i_eattr = 0;
Steven Whitehouse77658aa2008-02-12 14:17:27 +00001462 gfs2_add_inode_blocks(&ip->i_inode, -1);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001463
1464 error = gfs2_meta_inode_buffer(ip, &dibh);
1465 if (!error) {
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +00001466 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
Steven Whitehouse539e5d62006-10-31 15:07:05 -05001467 gfs2_dinode_out(ip, dibh->b_data);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001468 brelse(dibh);
1469 }
1470
1471 gfs2_trans_end(sdp);
1472
Steven Whitehousea91ea692006-09-04 12:04:26 -04001473out_gunlock:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001474 gfs2_glock_dq_uninit(&al->al_rgd_gh);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001475 return error;
1476}
1477
1478/**
1479 * gfs2_ea_dealloc - deallocate the extended attribute fork
1480 * @ip: the inode
1481 *
1482 * Returns: errno
1483 */
1484
1485int gfs2_ea_dealloc(struct gfs2_inode *ip)
1486{
1487 struct gfs2_alloc *al;
1488 int error;
1489
1490 al = gfs2_alloc_get(ip);
Cyrill Gorcunov182fe5a2008-03-03 21:54:21 +03001491 if (!al)
1492 return -ENOMEM;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001493
1494 error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
1495 if (error)
1496 goto out_alloc;
1497
David Teiglandb3b94fa2006-01-16 16:50:04 +00001498 error = ea_foreach(ip, ea_dealloc_unstuffed, NULL);
1499 if (error)
Steven Whitehouse8339ee52011-08-31 16:38:29 +01001500 goto out_quota;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001501
Steven Whitehouse383f01f2008-11-04 10:05:22 +00001502 if (ip->i_diskflags & GFS2_DIF_EA_INDIRECT) {
David Teiglandb3b94fa2006-01-16 16:50:04 +00001503 error = ea_dealloc_indirect(ip);
1504 if (error)
Steven Whitehouse8339ee52011-08-31 16:38:29 +01001505 goto out_quota;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001506 }
1507
1508 error = ea_dealloc_block(ip);
1509
Steven Whitehousea91ea692006-09-04 12:04:26 -04001510out_quota:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001511 gfs2_quota_unhold(ip);
Steven Whitehousea91ea692006-09-04 12:04:26 -04001512out_alloc:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001513 gfs2_alloc_put(ip);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001514 return error;
1515}
1516
Stephen Hemmingerb7bb0a12010-05-13 17:53:23 -07001517static const struct xattr_handler gfs2_xattr_user_handler = {
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001518 .prefix = XATTR_USER_PREFIX,
Christoph Hellwig431547b2009-11-13 09:52:56 +00001519 .flags = GFS2_EATYPE_USR,
1520 .get = gfs2_xattr_get,
1521 .set = gfs2_xattr_set,
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001522};
1523
Stephen Hemmingerb7bb0a12010-05-13 17:53:23 -07001524static const struct xattr_handler gfs2_xattr_security_handler = {
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001525 .prefix = XATTR_SECURITY_PREFIX,
Christoph Hellwig431547b2009-11-13 09:52:56 +00001526 .flags = GFS2_EATYPE_SECURITY,
1527 .get = gfs2_xattr_get,
1528 .set = gfs2_xattr_set,
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001529};
1530
Stephen Hemmingerb7bb0a12010-05-13 17:53:23 -07001531const struct xattr_handler *gfs2_xattr_handlers[] = {
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001532 &gfs2_xattr_user_handler,
1533 &gfs2_xattr_security_handler,
1534 &gfs2_xattr_system_handler,
1535 NULL,
1536};
1537