blob: 3a28535040841151a9d246d104f7e145aa5b28f8 [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>
Christoph Hellwige01580b2013-12-20 05:16:52 -080016#include <linux/posix_acl_xattr.h>
David Teiglandb3b94fa2006-01-16 16:50:04 +000017#include <asm/uaccess.h>
18
19#include "gfs2.h"
Steven Whitehouse5c676f62006-02-27 17:23:27 -050020#include "incore.h"
David Teiglandb3b94fa2006-01-16 16:50:04 +000021#include "acl.h"
Steven Whitehouse307cf6e2009-08-26 18:51:04 +010022#include "xattr.h"
David Teiglandb3b94fa2006-01-16 16:50:04 +000023#include "glock.h"
24#include "inode.h"
25#include "meta_io.h"
26#include "quota.h"
27#include "rgrp.h"
28#include "trans.h"
Steven Whitehouse5c676f62006-02-27 17:23:27 -050029#include "util.h"
David Teiglandb3b94fa2006-01-16 16:50:04 +000030
31/**
32 * ea_calc_size - returns the acutal number of bytes the request will take up
33 * (not counting any unstuffed data blocks)
34 * @sdp:
35 * @er:
36 * @size:
37 *
38 * Returns: 1 if the EA should be stuffed
39 */
40
Steven Whitehouse40b78a32009-08-26 18:41:32 +010041static int ea_calc_size(struct gfs2_sbd *sdp, unsigned int nsize, size_t dsize,
David Teiglandb3b94fa2006-01-16 16:50:04 +000042 unsigned int *size)
43{
Steven Whitehouse40b78a32009-08-26 18:41:32 +010044 unsigned int jbsize = sdp->sd_jbsize;
45
46 /* Stuffed */
47 *size = ALIGN(sizeof(struct gfs2_ea_header) + nsize + dsize, 8);
48
49 if (*size <= jbsize)
David Teiglandb3b94fa2006-01-16 16:50:04 +000050 return 1;
51
Steven Whitehouse40b78a32009-08-26 18:41:32 +010052 /* Unstuffed */
53 *size = ALIGN(sizeof(struct gfs2_ea_header) + nsize +
54 (sizeof(__be64) * DIV_ROUND_UP(dsize, jbsize)), 8);
David Teiglandb3b94fa2006-01-16 16:50:04 +000055
56 return 0;
57}
58
Steven Whitehouse40b78a32009-08-26 18:41:32 +010059static int ea_check_size(struct gfs2_sbd *sdp, unsigned int nsize, size_t dsize)
David Teiglandb3b94fa2006-01-16 16:50:04 +000060{
61 unsigned int size;
62
Steven Whitehouse40b78a32009-08-26 18:41:32 +010063 if (dsize > GFS2_EA_MAX_DATA_LEN)
David Teiglandb3b94fa2006-01-16 16:50:04 +000064 return -ERANGE;
65
Steven Whitehouse40b78a32009-08-26 18:41:32 +010066 ea_calc_size(sdp, nsize, dsize, &size);
David Teiglandb3b94fa2006-01-16 16:50:04 +000067
68 /* This can only happen with 512 byte blocks */
69 if (size > sdp->sd_jbsize)
70 return -ERANGE;
71
72 return 0;
73}
74
Steven Whitehousecca195c2006-09-05 13:15:18 -040075typedef int (*ea_call_t) (struct gfs2_inode *ip, struct buffer_head *bh,
David Teiglandb3b94fa2006-01-16 16:50:04 +000076 struct gfs2_ea_header *ea,
Steven Whitehousecca195c2006-09-05 13:15:18 -040077 struct gfs2_ea_header *prev, void *private);
David Teiglandb3b94fa2006-01-16 16:50:04 +000078
79static int ea_foreach_i(struct gfs2_inode *ip, struct buffer_head *bh,
80 ea_call_t ea_call, void *data)
81{
82 struct gfs2_ea_header *ea, *prev = NULL;
83 int error = 0;
84
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -040085 if (gfs2_metatype_check(GFS2_SB(&ip->i_inode), bh, GFS2_METATYPE_EA))
David Teiglandb3b94fa2006-01-16 16:50:04 +000086 return -EIO;
87
88 for (ea = GFS2_EA_BH2FIRST(bh);; prev = ea, ea = GFS2_EA2NEXT(ea)) {
89 if (!GFS2_EA_REC_LEN(ea))
90 goto fail;
Steven Whitehousecca195c2006-09-05 13:15:18 -040091 if (!(bh->b_data <= (char *)ea && (char *)GFS2_EA2NEXT(ea) <=
92 bh->b_data + bh->b_size))
David Teiglandb3b94fa2006-01-16 16:50:04 +000093 goto fail;
94 if (!GFS2_EATYPE_VALID(ea->ea_type))
95 goto fail;
96
97 error = ea_call(ip, bh, ea, prev, data);
98 if (error)
99 return error;
100
101 if (GFS2_EA_IS_LAST(ea)) {
102 if ((char *)GFS2_EA2NEXT(ea) !=
103 bh->b_data + bh->b_size)
104 goto fail;
105 break;
106 }
107 }
108
109 return error;
110
Steven Whitehousea91ea692006-09-04 12:04:26 -0400111fail:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000112 gfs2_consist_inode(ip);
113 return -EIO;
114}
115
116static int ea_foreach(struct gfs2_inode *ip, ea_call_t ea_call, void *data)
117{
118 struct buffer_head *bh, *eabh;
Al Virob44b84d2006-10-14 10:46:30 -0400119 __be64 *eablk, *end;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000120 int error;
121
Andreas Gruenbacherc8d57702015-11-11 15:00:35 -0600122 error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT, 0, &bh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000123 if (error)
124 return error;
125
Steven Whitehouse383f01f2008-11-04 10:05:22 +0000126 if (!(ip->i_diskflags & GFS2_DIF_EA_INDIRECT)) {
David Teiglandb3b94fa2006-01-16 16:50:04 +0000127 error = ea_foreach_i(ip, bh, ea_call, data);
128 goto out;
129 }
130
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400131 if (gfs2_metatype_check(GFS2_SB(&ip->i_inode), bh, GFS2_METATYPE_IN)) {
David Teiglandb3b94fa2006-01-16 16:50:04 +0000132 error = -EIO;
133 goto out;
134 }
135
Al Virob44b84d2006-10-14 10:46:30 -0400136 eablk = (__be64 *)(bh->b_data + sizeof(struct gfs2_meta_header));
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400137 end = eablk + GFS2_SB(&ip->i_inode)->sd_inptrs;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000138
139 for (; eablk < end; eablk++) {
Steven Whitehousecd915492006-09-04 12:49:07 -0400140 u64 bn;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000141
142 if (!*eablk)
143 break;
144 bn = be64_to_cpu(*eablk);
145
Andreas Gruenbacherc8d57702015-11-11 15:00:35 -0600146 error = gfs2_meta_read(ip->i_gl, bn, DIO_WAIT, 0, &eabh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000147 if (error)
148 break;
149 error = ea_foreach_i(ip, eabh, ea_call, data);
150 brelse(eabh);
151 if (error)
152 break;
153 }
Steven Whitehousea91ea692006-09-04 12:04:26 -0400154out:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000155 brelse(bh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000156 return error;
157}
158
159struct ea_find {
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100160 int type;
161 const char *name;
162 size_t namel;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000163 struct gfs2_ea_location *ef_el;
164};
165
166static int ea_find_i(struct gfs2_inode *ip, struct buffer_head *bh,
167 struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
168 void *private)
169{
170 struct ea_find *ef = private;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000171
172 if (ea->ea_type == GFS2_EATYPE_UNUSED)
173 return 0;
174
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100175 if (ea->ea_type == ef->type) {
176 if (ea->ea_name_len == ef->namel &&
177 !memcmp(GFS2_EA2NAME(ea), ef->name, ea->ea_name_len)) {
David Teiglandb3b94fa2006-01-16 16:50:04 +0000178 struct gfs2_ea_location *el = ef->ef_el;
179 get_bh(bh);
180 el->el_bh = bh;
181 el->el_ea = ea;
182 el->el_prev = prev;
183 return 1;
184 }
185 }
186
David Teiglandb3b94fa2006-01-16 16:50:04 +0000187 return 0;
188}
189
Steven Whitehouse479c4272009-10-02 12:00:00 +0100190static int gfs2_ea_find(struct gfs2_inode *ip, int type, const char *name,
191 struct gfs2_ea_location *el)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000192{
193 struct ea_find ef;
194 int error;
195
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100196 ef.type = type;
197 ef.name = name;
198 ef.namel = strlen(name);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000199 ef.ef_el = el;
200
201 memset(el, 0, sizeof(struct gfs2_ea_location));
202
203 error = ea_foreach(ip, ea_find_i, &ef);
204 if (error > 0)
205 return 0;
206
207 return error;
208}
209
210/**
211 * ea_dealloc_unstuffed -
212 * @ip:
213 * @bh:
214 * @ea:
215 * @prev:
216 * @private:
217 *
218 * Take advantage of the fact that all unstuffed blocks are
219 * allocated from the same RG. But watch, this may not always
220 * be true.
221 *
222 * Returns: errno
223 */
224
225static int ea_dealloc_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh,
226 struct gfs2_ea_header *ea,
227 struct gfs2_ea_header *prev, void *private)
228{
229 int *leave = private;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400230 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000231 struct gfs2_rgrpd *rgd;
232 struct gfs2_holder rg_gh;
233 struct buffer_head *dibh;
Al Virob44b84d2006-10-14 10:46:30 -0400234 __be64 *dataptrs;
235 u64 bn = 0;
Steven Whitehousecd915492006-09-04 12:49:07 -0400236 u64 bstart = 0;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000237 unsigned int blen = 0;
238 unsigned int blks = 0;
239 unsigned int x;
240 int error;
241
Bob Peterson5e2f7d62012-04-04 22:11:16 -0400242 error = gfs2_rindex_update(sdp);
243 if (error)
244 return error;
245
David Teiglandb3b94fa2006-01-16 16:50:04 +0000246 if (GFS2_EA_IS_STUFFED(ea))
247 return 0;
248
249 dataptrs = GFS2_EA2DATAPTRS(ea);
Steven Whitehousecca195c2006-09-05 13:15:18 -0400250 for (x = 0; x < ea->ea_num_ptrs; x++, dataptrs++) {
David Teiglandb3b94fa2006-01-16 16:50:04 +0000251 if (*dataptrs) {
252 blks++;
253 bn = be64_to_cpu(*dataptrs);
254 }
Steven Whitehousecca195c2006-09-05 13:15:18 -0400255 }
David Teiglandb3b94fa2006-01-16 16:50:04 +0000256 if (!blks)
257 return 0;
258
Steven Whitehouse66fc0612012-02-08 12:58:32 +0000259 rgd = gfs2_blk2rgrpd(sdp, bn, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000260 if (!rgd) {
261 gfs2_consist_inode(ip);
262 return -EIO;
263 }
264
265 error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &rg_gh);
266 if (error)
267 return error;
268
Steven Whitehousebb8d8a62007-06-01 14:11:58 +0100269 error = gfs2_trans_begin(sdp, rgd->rd_length + RES_DINODE +
Steven Whitehousecca195c2006-09-05 13:15:18 -0400270 RES_EATTR + RES_STATFS + RES_QUOTA, blks);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000271 if (error)
272 goto out_gunlock;
273
Steven Whitehouse350a9b02012-12-14 12:36:02 +0000274 gfs2_trans_add_meta(ip->i_gl, bh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000275
276 dataptrs = GFS2_EA2DATAPTRS(ea);
277 for (x = 0; x < ea->ea_num_ptrs; x++, dataptrs++) {
278 if (!*dataptrs)
279 break;
280 bn = be64_to_cpu(*dataptrs);
281
282 if (bstart + blen == bn)
283 blen++;
284 else {
285 if (bstart)
286 gfs2_free_meta(ip, bstart, blen);
287 bstart = bn;
288 blen = 1;
289 }
290
291 *dataptrs = 0;
Steven Whitehouse77658aa2008-02-12 14:17:27 +0000292 gfs2_add_inode_blocks(&ip->i_inode, -1);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000293 }
294 if (bstart)
295 gfs2_free_meta(ip, bstart, blen);
296
297 if (prev && !leave) {
Steven Whitehousecd915492006-09-04 12:49:07 -0400298 u32 len;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000299
300 len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
301 prev->ea_rec_len = cpu_to_be32(len);
302
303 if (GFS2_EA_IS_LAST(ea))
304 prev->ea_flags |= GFS2_EAFLAG_LAST;
305 } else {
306 ea->ea_type = GFS2_EATYPE_UNUSED;
307 ea->ea_num_ptrs = 0;
308 }
309
310 error = gfs2_meta_inode_buffer(ip, &dibh);
311 if (!error) {
Steven Whitehouse4bd91ba2007-06-05 09:39:18 +0100312 ip->i_inode.i_ctime = CURRENT_TIME;
Steven Whitehouse350a9b02012-12-14 12:36:02 +0000313 gfs2_trans_add_meta(ip->i_gl, dibh);
Steven Whitehouse539e5d62006-10-31 15:07:05 -0500314 gfs2_dinode_out(ip, dibh->b_data);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000315 brelse(dibh);
316 }
317
318 gfs2_trans_end(sdp);
319
Steven Whitehousea91ea692006-09-04 12:04:26 -0400320out_gunlock:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000321 gfs2_glock_dq_uninit(&rg_gh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000322 return error;
323}
324
325static int ea_remove_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh,
326 struct gfs2_ea_header *ea,
327 struct gfs2_ea_header *prev, int leave)
328{
David Teiglandb3b94fa2006-01-16 16:50:04 +0000329 int error;
330
Bob Peterson8e2e0042012-07-19 08:12:40 -0400331 error = gfs2_rindex_update(GFS2_SB(&ip->i_inode));
332 if (error)
333 return error;
334
Eric W. Biedermanf4108a62013-01-31 17:49:26 -0800335 error = gfs2_quota_hold(ip, NO_UID_QUOTA_CHANGE, NO_GID_QUOTA_CHANGE);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000336 if (error)
337 goto out_alloc;
338
Steven Whitehousecca195c2006-09-05 13:15:18 -0400339 error = ea_dealloc_unstuffed(ip, bh, ea, prev, (leave) ? &error : NULL);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000340
David Teiglandb3b94fa2006-01-16 16:50:04 +0000341 gfs2_quota_unhold(ip);
Steven Whitehousea91ea692006-09-04 12:04:26 -0400342out_alloc:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000343 return error;
344}
345
David Teiglandb3b94fa2006-01-16 16:50:04 +0000346struct ea_list {
347 struct gfs2_ea_request *ei_er;
348 unsigned int ei_size;
349};
350
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100351static inline unsigned int gfs2_ea_strlen(struct gfs2_ea_header *ea)
352{
353 switch (ea->ea_type) {
354 case GFS2_EATYPE_USR:
355 return 5 + ea->ea_name_len + 1;
356 case GFS2_EATYPE_SYS:
357 return 7 + ea->ea_name_len + 1;
358 case GFS2_EATYPE_SECURITY:
359 return 9 + ea->ea_name_len + 1;
360 default:
361 return 0;
362 }
363}
364
David Teiglandb3b94fa2006-01-16 16:50:04 +0000365static int ea_list_i(struct gfs2_inode *ip, struct buffer_head *bh,
366 struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
367 void *private)
368{
369 struct ea_list *ei = private;
370 struct gfs2_ea_request *er = ei->ei_er;
Ryan O'Hara639b6d72006-05-22 10:08:35 -0400371 unsigned int ea_size = gfs2_ea_strlen(ea);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000372
373 if (ea->ea_type == GFS2_EATYPE_UNUSED)
374 return 0;
375
376 if (er->er_data_len) {
Steven Whitehouse01eb7c02006-06-06 17:31:30 -0400377 char *prefix = NULL;
378 unsigned int l = 0;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000379 char c = 0;
380
381 if (ei->ei_size + ea_size > er->er_data_len)
382 return -ERANGE;
383
Ryan O'Hara639b6d72006-05-22 10:08:35 -0400384 switch (ea->ea_type) {
385 case GFS2_EATYPE_USR:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000386 prefix = "user.";
387 l = 5;
Ryan O'Hara639b6d72006-05-22 10:08:35 -0400388 break;
389 case GFS2_EATYPE_SYS:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000390 prefix = "system.";
391 l = 7;
Ryan O'Hara639b6d72006-05-22 10:08:35 -0400392 break;
393 case GFS2_EATYPE_SECURITY:
394 prefix = "security.";
395 l = 9;
396 break;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000397 }
398
Steven Whitehouse01eb7c02006-06-06 17:31:30 -0400399 BUG_ON(l == 0);
400
Steven Whitehouse90cdd202006-05-22 10:36:25 -0400401 memcpy(er->er_data + ei->ei_size, prefix, l);
402 memcpy(er->er_data + ei->ei_size + l, GFS2_EA2NAME(ea),
David Teiglandb3b94fa2006-01-16 16:50:04 +0000403 ea->ea_name_len);
Steven Whitehouse90cdd202006-05-22 10:36:25 -0400404 memcpy(er->er_data + ei->ei_size + ea_size - 1, &c, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000405 }
406
407 ei->ei_size += ea_size;
408
409 return 0;
410}
411
412/**
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100413 * gfs2_listxattr - List gfs2 extended attributes
414 * @dentry: The dentry whose inode we are interested in
415 * @buffer: The buffer to write the results
416 * @size: The size of the buffer
David Teiglandb3b94fa2006-01-16 16:50:04 +0000417 *
418 * Returns: actual size of data on success, -errno on error
419 */
420
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100421ssize_t gfs2_listxattr(struct dentry *dentry, char *buffer, size_t size)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000422{
David Howells2b0143b2015-03-17 22:25:59 +0000423 struct gfs2_inode *ip = GFS2_I(d_inode(dentry));
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100424 struct gfs2_ea_request er;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000425 struct gfs2_holder i_gh;
426 int error;
427
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100428 memset(&er, 0, sizeof(struct gfs2_ea_request));
429 if (size) {
430 er.er_data = buffer;
431 er.er_data_len = size;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000432 }
433
Steven Whitehousecca195c2006-09-05 13:15:18 -0400434 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000435 if (error)
436 return error;
437
Steven Whitehouse3767ac22008-11-03 14:28:42 +0000438 if (ip->i_eattr) {
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100439 struct ea_list ei = { .ei_er = &er, .ei_size = 0 };
David Teiglandb3b94fa2006-01-16 16:50:04 +0000440
441 error = ea_foreach(ip, ea_list_i, &ei);
442 if (!error)
443 error = ei.ei_size;
444 }
445
446 gfs2_glock_dq_uninit(&i_gh);
447
448 return error;
449}
450
451/**
Steven Whitehouse1f981692012-07-26 11:26:36 +0100452 * ea_iter_unstuffed - copies the unstuffed xattr data to/from the
453 * request buffer
Steven Whitehousecca195c2006-09-05 13:15:18 -0400454 * @ip: The GFS2 inode
455 * @ea: The extended attribute header structure
Steven Whitehouse1f981692012-07-26 11:26:36 +0100456 * @din: The data to be copied in
457 * @dout: The data to be copied out (one of din,dout will be NULL)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000458 *
459 * Returns: errno
460 */
461
Steven Whitehouse1f981692012-07-26 11:26:36 +0100462static int gfs2_iter_unstuffed(struct gfs2_inode *ip, struct gfs2_ea_header *ea,
463 const char *din, char *dout)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000464{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400465 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000466 struct buffer_head **bh;
467 unsigned int amount = GFS2_EA_DATA_LEN(ea);
Steven Whitehouse5c676f62006-02-27 17:23:27 -0500468 unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize);
Al Virob44b84d2006-10-14 10:46:30 -0400469 __be64 *dataptrs = GFS2_EA2DATAPTRS(ea);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000470 unsigned int x;
471 int error = 0;
Steven Whitehouse1f981692012-07-26 11:26:36 +0100472 unsigned char *pos;
473 unsigned cp_size;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000474
Josef Bacik16c5f062008-04-09 09:33:41 -0400475 bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_NOFS);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000476 if (!bh)
477 return -ENOMEM;
478
479 for (x = 0; x < nptrs; x++) {
Andreas Gruenbacherc8d57702015-11-11 15:00:35 -0600480 error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs), 0, 0,
Steven Whitehouse7276b3b2006-09-21 17:05:23 -0400481 bh + x);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000482 if (error) {
483 while (x--)
484 brelse(bh[x]);
485 goto out;
486 }
487 dataptrs++;
488 }
489
490 for (x = 0; x < nptrs; x++) {
Steven Whitehouse7276b3b2006-09-21 17:05:23 -0400491 error = gfs2_meta_wait(sdp, bh[x]);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000492 if (error) {
493 for (; x < nptrs; x++)
494 brelse(bh[x]);
495 goto out;
496 }
497 if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) {
498 for (; x < nptrs; x++)
499 brelse(bh[x]);
500 error = -EIO;
501 goto out;
502 }
503
Steven Whitehouse1f981692012-07-26 11:26:36 +0100504 pos = bh[x]->b_data + sizeof(struct gfs2_meta_header);
505 cp_size = (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize;
506
507 if (dout) {
508 memcpy(dout, pos, cp_size);
509 dout += sdp->sd_jbsize;
510 }
511
512 if (din) {
Steven Whitehouse350a9b02012-12-14 12:36:02 +0000513 gfs2_trans_add_meta(ip->i_gl, bh[x]);
Steven Whitehouse1f981692012-07-26 11:26:36 +0100514 memcpy(pos, din, cp_size);
515 din += sdp->sd_jbsize;
516 }
David Teiglandb3b94fa2006-01-16 16:50:04 +0000517
518 amount -= sdp->sd_jbsize;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000519 brelse(bh[x]);
520 }
521
Steven Whitehousea91ea692006-09-04 12:04:26 -0400522out:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000523 kfree(bh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000524 return error;
525}
526
Steven Whitehouse479c4272009-10-02 12:00:00 +0100527static int gfs2_ea_get_copy(struct gfs2_inode *ip, struct gfs2_ea_location *el,
528 char *data, size_t size)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000529{
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100530 int ret;
531 size_t len = GFS2_EA_DATA_LEN(el->el_ea);
532 if (len > size)
533 return -ERANGE;
534
David Teiglandb3b94fa2006-01-16 16:50:04 +0000535 if (GFS2_EA_IS_STUFFED(el->el_ea)) {
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100536 memcpy(data, GFS2_EA2DATA(el->el_ea), len);
537 return len;
538 }
Steven Whitehouse1f981692012-07-26 11:26:36 +0100539 ret = gfs2_iter_unstuffed(ip, el->el_ea, NULL, data);
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100540 if (ret < 0)
541 return ret;
542 return len;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000543}
544
Steven Whitehouse479c4272009-10-02 12:00:00 +0100545int gfs2_xattr_acl_get(struct gfs2_inode *ip, const char *name, char **ppdata)
546{
547 struct gfs2_ea_location el;
548 int error;
549 int len;
550 char *data;
551
552 error = gfs2_ea_find(ip, GFS2_EATYPE_SYS, name, &el);
553 if (error)
554 return error;
555 if (!el.el_ea)
556 goto out;
557 if (!GFS2_EA_DATA_LEN(el.el_ea))
558 goto out;
559
560 len = GFS2_EA_DATA_LEN(el.el_ea);
561 data = kmalloc(len, GFP_NOFS);
562 error = -ENOMEM;
563 if (data == NULL)
564 goto out;
565
566 error = gfs2_ea_get_copy(ip, &el, data, len);
Steven Whitehouse114b80c2011-11-09 12:54:43 +0000567 if (error < 0)
568 kfree(data);
569 else
570 *ppdata = data;
Steven Whitehouse479c4272009-10-02 12:00:00 +0100571out:
572 brelse(el.el_bh);
573 return error;
574}
575
David Teiglandb3b94fa2006-01-16 16:50:04 +0000576/**
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100577 * gfs2_xattr_get - Get a GFS2 extended attribute
578 * @inode: The inode
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100579 * @name: The name of the extended attribute
580 * @buffer: The buffer to write the result into
581 * @size: The size of the buffer
Christoph Hellwig431547b2009-11-13 09:52:56 +0000582 * @type: The type of extended attribute
David Teiglandb3b94fa2006-01-16 16:50:04 +0000583 *
584 * Returns: actual size of data on success, -errno on error
585 */
Al Viro1a39ba92016-05-13 03:59:17 +0200586static int __gfs2_xattr_get(struct inode *inode, const char *name,
587 void *buffer, size_t size, int type)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000588{
Al Virob2968212016-04-10 20:48:24 -0400589 struct gfs2_inode *ip = GFS2_I(inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000590 struct gfs2_ea_location el;
591 int error;
592
Steven Whitehouse3767ac22008-11-03 14:28:42 +0000593 if (!ip->i_eattr)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000594 return -ENODATA;
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100595 if (strlen(name) > GFS2_EA_MAX_NAME_LEN)
596 return -EINVAL;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000597
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100598 error = gfs2_ea_find(ip, type, name, &el);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000599 if (error)
600 return error;
601 if (!el.el_ea)
602 return -ENODATA;
Steven Whitehouse86d00632009-09-14 09:50:57 +0100603 if (size)
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100604 error = gfs2_ea_get_copy(ip, &el, buffer, size);
605 else
David Teiglandb3b94fa2006-01-16 16:50:04 +0000606 error = GFS2_EA_DATA_LEN(el.el_ea);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000607 brelse(el.el_bh);
608
609 return error;
610}
611
Al Viro1a39ba92016-05-13 03:59:17 +0200612static int gfs2_xattr_get(const struct xattr_handler *handler,
613 struct dentry *unused, struct inode *inode,
614 const char *name, void *buffer, size_t size)
615{
616 struct gfs2_inode *ip = GFS2_I(inode);
617 struct gfs2_holder gh;
618 bool need_unlock = false;
619 int ret;
620
621 /* During lookup, SELinux calls this function with the glock locked. */
622
623 if (!gfs2_glock_is_locked_by_me(ip->i_gl)) {
624 ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh);
625 if (ret)
626 return ret;
627 need_unlock = true;
628 }
629 ret = __gfs2_xattr_get(inode, name, buffer, size, handler->flags);
630 if (need_unlock)
631 gfs2_glock_dq_uninit(&gh);
632 return ret;
633}
634
David Teiglandb3b94fa2006-01-16 16:50:04 +0000635/**
David Teiglandb3b94fa2006-01-16 16:50:04 +0000636 * ea_alloc_blk - allocates a new block for extended attributes.
637 * @ip: A pointer to the inode that's getting extended attributes
Steven Whitehousecca195c2006-09-05 13:15:18 -0400638 * @bhp: Pointer to pointer to a struct buffer_head
David Teiglandb3b94fa2006-01-16 16:50:04 +0000639 *
640 * Returns: errno
641 */
642
643static int ea_alloc_blk(struct gfs2_inode *ip, struct buffer_head **bhp)
644{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400645 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000646 struct gfs2_ea_header *ea;
Steven Whitehouseb45e41d2008-02-06 10:11:15 +0000647 unsigned int n = 1;
Steven Whitehousecd915492006-09-04 12:49:07 -0400648 u64 block;
Steven Whitehouse09010972009-05-20 10:48:47 +0100649 int error;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000650
Bob Peterson6e87ed02011-11-18 10:58:32 -0500651 error = gfs2_alloc_blocks(ip, &block, &n, 0, NULL);
Steven Whitehouse09010972009-05-20 10:48:47 +0100652 if (error)
653 return error;
Steven Whitehouse5731be52008-02-01 13:16:55 +0000654 gfs2_trans_add_unrevoke(sdp, block, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000655 *bhp = gfs2_meta_new(ip->i_gl, block);
Steven Whitehouse350a9b02012-12-14 12:36:02 +0000656 gfs2_trans_add_meta(ip->i_gl, *bhp);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000657 gfs2_metatype_set(*bhp, GFS2_METATYPE_EA, GFS2_FORMAT_EA);
658 gfs2_buffer_clear_tail(*bhp, sizeof(struct gfs2_meta_header));
659
660 ea = GFS2_EA_BH2FIRST(*bhp);
661 ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize);
662 ea->ea_type = GFS2_EATYPE_UNUSED;
663 ea->ea_flags = GFS2_EAFLAG_LAST;
664 ea->ea_num_ptrs = 0;
665
Steven Whitehouse77658aa2008-02-12 14:17:27 +0000666 gfs2_add_inode_blocks(&ip->i_inode, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000667
668 return 0;
669}
670
671/**
672 * ea_write - writes the request info to an ea, creating new blocks if
673 * necessary
Steven Whitehousecca195c2006-09-05 13:15:18 -0400674 * @ip: inode that is being modified
675 * @ea: the location of the new ea in a block
David Teiglandb3b94fa2006-01-16 16:50:04 +0000676 * @er: the write request
677 *
678 * Note: does not update ea_rec_len or the GFS2_EAFLAG_LAST bin of ea_flags
679 *
680 * returns : errno
681 */
682
683static int ea_write(struct gfs2_inode *ip, struct gfs2_ea_header *ea,
684 struct gfs2_ea_request *er)
685{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400686 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
Steven Whitehouse09010972009-05-20 10:48:47 +0100687 int error;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000688
689 ea->ea_data_len = cpu_to_be32(er->er_data_len);
690 ea->ea_name_len = er->er_name_len;
691 ea->ea_type = er->er_type;
692 ea->__pad = 0;
693
694 memcpy(GFS2_EA2NAME(ea), er->er_name, er->er_name_len);
695
696 if (GFS2_EAREQ_SIZE_STUFFED(er) <= sdp->sd_jbsize) {
697 ea->ea_num_ptrs = 0;
698 memcpy(GFS2_EA2DATA(ea), er->er_data, er->er_data_len);
699 } else {
Al Virob44b84d2006-10-14 10:46:30 -0400700 __be64 *dataptr = GFS2_EA2DATAPTRS(ea);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000701 const char *data = er->er_data;
702 unsigned int data_len = er->er_data_len;
703 unsigned int copy;
704 unsigned int x;
705
Steven Whitehouse5c676f62006-02-27 17:23:27 -0500706 ea->ea_num_ptrs = DIV_ROUND_UP(er->er_data_len, sdp->sd_jbsize);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000707 for (x = 0; x < ea->ea_num_ptrs; x++) {
708 struct buffer_head *bh;
Steven Whitehousecd915492006-09-04 12:49:07 -0400709 u64 block;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000710 int mh_size = sizeof(struct gfs2_meta_header);
Steven Whitehouseb45e41d2008-02-06 10:11:15 +0000711 unsigned int n = 1;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000712
Bob Peterson6e87ed02011-11-18 10:58:32 -0500713 error = gfs2_alloc_blocks(ip, &block, &n, 0, NULL);
Steven Whitehouse09010972009-05-20 10:48:47 +0100714 if (error)
715 return error;
Steven Whitehouse5731be52008-02-01 13:16:55 +0000716 gfs2_trans_add_unrevoke(sdp, block, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000717 bh = gfs2_meta_new(ip->i_gl, block);
Steven Whitehouse350a9b02012-12-14 12:36:02 +0000718 gfs2_trans_add_meta(ip->i_gl, bh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000719 gfs2_metatype_set(bh, GFS2_METATYPE_ED, GFS2_FORMAT_ED);
720
Steven Whitehouse77658aa2008-02-12 14:17:27 +0000721 gfs2_add_inode_blocks(&ip->i_inode, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000722
Steven Whitehousecca195c2006-09-05 13:15:18 -0400723 copy = data_len > sdp->sd_jbsize ? sdp->sd_jbsize :
724 data_len;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000725 memcpy(bh->b_data + mh_size, data, copy);
726 if (copy < sdp->sd_jbsize)
727 memset(bh->b_data + mh_size + copy, 0,
728 sdp->sd_jbsize - copy);
729
Steven Whitehousecca195c2006-09-05 13:15:18 -0400730 *dataptr++ = cpu_to_be64(bh->b_blocknr);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000731 data += copy;
732 data_len -= copy;
733
734 brelse(bh);
735 }
736
737 gfs2_assert_withdraw(sdp, !data_len);
738 }
739
740 return 0;
741}
742
743typedef int (*ea_skeleton_call_t) (struct gfs2_inode *ip,
Steven Whitehousecca195c2006-09-05 13:15:18 -0400744 struct gfs2_ea_request *er, void *private);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000745
746static int ea_alloc_skeleton(struct gfs2_inode *ip, struct gfs2_ea_request *er,
747 unsigned int blks,
Steven Whitehousecca195c2006-09-05 13:15:18 -0400748 ea_skeleton_call_t skeleton_call, void *private)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000749{
Steven Whitehouse7b9cff42013-10-02 11:13:25 +0100750 struct gfs2_alloc_parms ap = { .target = blks };
David Teiglandb3b94fa2006-01-16 16:50:04 +0000751 struct buffer_head *dibh;
752 int error;
753
Bob Peterson8e2e0042012-07-19 08:12:40 -0400754 error = gfs2_rindex_update(GFS2_SB(&ip->i_inode));
755 if (error)
756 return error;
757
Abhi Dasb8fbf472015-03-18 12:03:41 -0500758 error = gfs2_quota_lock_check(ip, &ap);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000759 if (error)
Bob Peterson5407e242012-05-18 09:28:23 -0400760 return error;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000761
Steven Whitehouse7b9cff42013-10-02 11:13:25 +0100762 error = gfs2_inplace_reserve(ip, &ap);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000763 if (error)
764 goto out_gunlock_q;
765
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400766 error = gfs2_trans_begin(GFS2_SB(&ip->i_inode),
Steven Whitehouse71f890f2012-07-30 14:53:19 +0100767 blks + gfs2_rg_blocks(ip, blks) +
David Teiglandb3b94fa2006-01-16 16:50:04 +0000768 RES_DINODE + RES_STATFS + RES_QUOTA, 0);
769 if (error)
770 goto out_ipres;
771
772 error = skeleton_call(ip, er, private);
773 if (error)
774 goto out_end_trans;
775
776 error = gfs2_meta_inode_buffer(ip, &dibh);
777 if (!error) {
Steven Whitehouse4bd91ba2007-06-05 09:39:18 +0100778 ip->i_inode.i_ctime = CURRENT_TIME;
Steven Whitehouse350a9b02012-12-14 12:36:02 +0000779 gfs2_trans_add_meta(ip->i_gl, dibh);
Steven Whitehouse539e5d62006-10-31 15:07:05 -0500780 gfs2_dinode_out(ip, dibh->b_data);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000781 brelse(dibh);
782 }
783
Steven Whitehousea91ea692006-09-04 12:04:26 -0400784out_end_trans:
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400785 gfs2_trans_end(GFS2_SB(&ip->i_inode));
Steven Whitehousea91ea692006-09-04 12:04:26 -0400786out_ipres:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000787 gfs2_inplace_release(ip);
Steven Whitehousea91ea692006-09-04 12:04:26 -0400788out_gunlock_q:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000789 gfs2_quota_unlock(ip);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000790 return error;
791}
792
793static int ea_init_i(struct gfs2_inode *ip, struct gfs2_ea_request *er,
794 void *private)
795{
796 struct buffer_head *bh;
797 int error;
798
799 error = ea_alloc_blk(ip, &bh);
800 if (error)
801 return error;
802
Steven Whitehouse3767ac22008-11-03 14:28:42 +0000803 ip->i_eattr = bh->b_blocknr;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000804 error = ea_write(ip, GFS2_EA_BH2FIRST(bh), er);
805
806 brelse(bh);
807
808 return error;
809}
810
811/**
812 * ea_init - initializes a new eattr block
813 * @ip:
814 * @er:
815 *
816 * Returns: errno
817 */
818
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100819static int ea_init(struct gfs2_inode *ip, int type, const char *name,
820 const void *data, size_t size)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000821{
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100822 struct gfs2_ea_request er;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400823 unsigned int jbsize = GFS2_SB(&ip->i_inode)->sd_jbsize;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000824 unsigned int blks = 1;
825
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100826 er.er_type = type;
827 er.er_name = name;
828 er.er_name_len = strlen(name);
829 er.er_data = (void *)data;
830 er.er_data_len = size;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000831
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100832 if (GFS2_EAREQ_SIZE_STUFFED(&er) > jbsize)
833 blks += DIV_ROUND_UP(er.er_data_len, jbsize);
834
835 return ea_alloc_skeleton(ip, &er, blks, ea_init_i, NULL);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000836}
837
838static struct gfs2_ea_header *ea_split_ea(struct gfs2_ea_header *ea)
839{
Steven Whitehousecd915492006-09-04 12:49:07 -0400840 u32 ea_size = GFS2_EA_SIZE(ea);
Steven Whitehouse568f4c92006-02-27 12:00:42 -0500841 struct gfs2_ea_header *new = (struct gfs2_ea_header *)((char *)ea +
842 ea_size);
Steven Whitehousecd915492006-09-04 12:49:07 -0400843 u32 new_size = GFS2_EA_REC_LEN(ea) - ea_size;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000844 int last = ea->ea_flags & GFS2_EAFLAG_LAST;
845
846 ea->ea_rec_len = cpu_to_be32(ea_size);
847 ea->ea_flags ^= last;
848
849 new->ea_rec_len = cpu_to_be32(new_size);
850 new->ea_flags = last;
851
852 return new;
853}
854
855static void ea_set_remove_stuffed(struct gfs2_inode *ip,
856 struct gfs2_ea_location *el)
857{
858 struct gfs2_ea_header *ea = el->el_ea;
859 struct gfs2_ea_header *prev = el->el_prev;
Steven Whitehousecd915492006-09-04 12:49:07 -0400860 u32 len;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000861
Steven Whitehouse350a9b02012-12-14 12:36:02 +0000862 gfs2_trans_add_meta(ip->i_gl, el->el_bh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000863
864 if (!prev || !GFS2_EA_IS_STUFFED(ea)) {
865 ea->ea_type = GFS2_EATYPE_UNUSED;
866 return;
867 } else if (GFS2_EA2NEXT(prev) != ea) {
868 prev = GFS2_EA2NEXT(prev);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400869 gfs2_assert_withdraw(GFS2_SB(&ip->i_inode), GFS2_EA2NEXT(prev) == ea);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000870 }
871
872 len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
873 prev->ea_rec_len = cpu_to_be32(len);
874
875 if (GFS2_EA_IS_LAST(ea))
876 prev->ea_flags |= GFS2_EAFLAG_LAST;
877}
878
879struct ea_set {
880 int ea_split;
881
882 struct gfs2_ea_request *es_er;
883 struct gfs2_ea_location *es_el;
884
885 struct buffer_head *es_bh;
886 struct gfs2_ea_header *es_ea;
887};
888
889static int ea_set_simple_noalloc(struct gfs2_inode *ip, struct buffer_head *bh,
890 struct gfs2_ea_header *ea, struct ea_set *es)
891{
892 struct gfs2_ea_request *er = es->es_er;
893 struct buffer_head *dibh;
894 int error;
895
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400896 error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + 2 * RES_EATTR, 0);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000897 if (error)
898 return error;
899
Steven Whitehouse350a9b02012-12-14 12:36:02 +0000900 gfs2_trans_add_meta(ip->i_gl, bh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000901
902 if (es->ea_split)
903 ea = ea_split_ea(ea);
904
905 ea_write(ip, ea, er);
906
907 if (es->es_el)
908 ea_set_remove_stuffed(ip, es->es_el);
909
910 error = gfs2_meta_inode_buffer(ip, &dibh);
911 if (error)
912 goto out;
Steven Whitehouse4bd91ba2007-06-05 09:39:18 +0100913 ip->i_inode.i_ctime = CURRENT_TIME;
Steven Whitehouse350a9b02012-12-14 12:36:02 +0000914 gfs2_trans_add_meta(ip->i_gl, dibh);
Steven Whitehouse539e5d62006-10-31 15:07:05 -0500915 gfs2_dinode_out(ip, dibh->b_data);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000916 brelse(dibh);
Steven Whitehousea91ea692006-09-04 12:04:26 -0400917out:
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400918 gfs2_trans_end(GFS2_SB(&ip->i_inode));
David Teiglandb3b94fa2006-01-16 16:50:04 +0000919 return error;
920}
921
922static int ea_set_simple_alloc(struct gfs2_inode *ip,
923 struct gfs2_ea_request *er, void *private)
924{
925 struct ea_set *es = private;
926 struct gfs2_ea_header *ea = es->es_ea;
927 int error;
928
Steven Whitehouse350a9b02012-12-14 12:36:02 +0000929 gfs2_trans_add_meta(ip->i_gl, es->es_bh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000930
931 if (es->ea_split)
932 ea = ea_split_ea(ea);
933
934 error = ea_write(ip, ea, er);
935 if (error)
936 return error;
937
938 if (es->es_el)
939 ea_set_remove_stuffed(ip, es->es_el);
940
941 return 0;
942}
943
944static int ea_set_simple(struct gfs2_inode *ip, struct buffer_head *bh,
945 struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
946 void *private)
947{
948 struct ea_set *es = private;
949 unsigned int size;
950 int stuffed;
951 int error;
952
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100953 stuffed = ea_calc_size(GFS2_SB(&ip->i_inode), es->es_er->er_name_len,
954 es->es_er->er_data_len, &size);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000955
956 if (ea->ea_type == GFS2_EATYPE_UNUSED) {
957 if (GFS2_EA_REC_LEN(ea) < size)
958 return 0;
959 if (!GFS2_EA_IS_STUFFED(ea)) {
960 error = ea_remove_unstuffed(ip, bh, ea, prev, 1);
961 if (error)
962 return error;
963 }
964 es->ea_split = 0;
965 } else if (GFS2_EA_REC_LEN(ea) - GFS2_EA_SIZE(ea) >= size)
966 es->ea_split = 1;
967 else
968 return 0;
969
970 if (stuffed) {
971 error = ea_set_simple_noalloc(ip, bh, ea, es);
972 if (error)
973 return error;
974 } else {
975 unsigned int blks;
976
977 es->es_bh = bh;
978 es->es_ea = ea;
Steven Whitehouse5c676f62006-02-27 17:23:27 -0500979 blks = 2 + DIV_ROUND_UP(es->es_er->er_data_len,
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400980 GFS2_SB(&ip->i_inode)->sd_jbsize);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000981
982 error = ea_alloc_skeleton(ip, es->es_er, blks,
983 ea_set_simple_alloc, es);
984 if (error)
985 return error;
986 }
987
988 return 1;
989}
990
991static int ea_set_block(struct gfs2_inode *ip, struct gfs2_ea_request *er,
992 void *private)
993{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400994 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000995 struct buffer_head *indbh, *newbh;
Al Virob44b84d2006-10-14 10:46:30 -0400996 __be64 *eablk;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000997 int error;
998 int mh_size = sizeof(struct gfs2_meta_header);
999
Steven Whitehouse383f01f2008-11-04 10:05:22 +00001000 if (ip->i_diskflags & GFS2_DIF_EA_INDIRECT) {
Al Virob44b84d2006-10-14 10:46:30 -04001001 __be64 *end;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001002
Andreas Gruenbacherc8d57702015-11-11 15:00:35 -06001003 error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT, 0,
Steven Whitehouse7276b3b2006-09-21 17:05:23 -04001004 &indbh);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001005 if (error)
1006 return error;
1007
1008 if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) {
1009 error = -EIO;
1010 goto out;
1011 }
1012
Al Virob44b84d2006-10-14 10:46:30 -04001013 eablk = (__be64 *)(indbh->b_data + mh_size);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001014 end = eablk + sdp->sd_inptrs;
1015
1016 for (; eablk < end; eablk++)
1017 if (!*eablk)
1018 break;
1019
1020 if (eablk == end) {
1021 error = -ENOSPC;
1022 goto out;
1023 }
1024
Steven Whitehouse350a9b02012-12-14 12:36:02 +00001025 gfs2_trans_add_meta(ip->i_gl, indbh);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001026 } else {
Steven Whitehousecd915492006-09-04 12:49:07 -04001027 u64 blk;
Steven Whitehouseb45e41d2008-02-06 10:11:15 +00001028 unsigned int n = 1;
Bob Peterson6e87ed02011-11-18 10:58:32 -05001029 error = gfs2_alloc_blocks(ip, &blk, &n, 0, NULL);
Steven Whitehouse09010972009-05-20 10:48:47 +01001030 if (error)
1031 return error;
Steven Whitehouse5731be52008-02-01 13:16:55 +00001032 gfs2_trans_add_unrevoke(sdp, blk, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001033 indbh = gfs2_meta_new(ip->i_gl, blk);
Steven Whitehouse350a9b02012-12-14 12:36:02 +00001034 gfs2_trans_add_meta(ip->i_gl, indbh);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001035 gfs2_metatype_set(indbh, GFS2_METATYPE_IN, GFS2_FORMAT_IN);
1036 gfs2_buffer_clear_tail(indbh, mh_size);
1037
Al Virob44b84d2006-10-14 10:46:30 -04001038 eablk = (__be64 *)(indbh->b_data + mh_size);
Steven Whitehouse3767ac22008-11-03 14:28:42 +00001039 *eablk = cpu_to_be64(ip->i_eattr);
1040 ip->i_eattr = blk;
Steven Whitehouse383f01f2008-11-04 10:05:22 +00001041 ip->i_diskflags |= GFS2_DIF_EA_INDIRECT;
Steven Whitehouse77658aa2008-02-12 14:17:27 +00001042 gfs2_add_inode_blocks(&ip->i_inode, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001043
1044 eablk++;
1045 }
1046
1047 error = ea_alloc_blk(ip, &newbh);
1048 if (error)
1049 goto out;
1050
Steven Whitehousecd915492006-09-04 12:49:07 -04001051 *eablk = cpu_to_be64((u64)newbh->b_blocknr);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001052 error = ea_write(ip, GFS2_EA_BH2FIRST(newbh), er);
1053 brelse(newbh);
1054 if (error)
1055 goto out;
1056
1057 if (private)
Steven Whitehousecca195c2006-09-05 13:15:18 -04001058 ea_set_remove_stuffed(ip, private);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001059
Steven Whitehousea91ea692006-09-04 12:04:26 -04001060out:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001061 brelse(indbh);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001062 return error;
1063}
1064
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001065static int ea_set_i(struct gfs2_inode *ip, int type, const char *name,
1066 const void *value, size_t size, struct gfs2_ea_location *el)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001067{
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001068 struct gfs2_ea_request er;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001069 struct ea_set es;
1070 unsigned int blks = 2;
1071 int error;
1072
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001073 er.er_type = type;
1074 er.er_name = name;
1075 er.er_data = (void *)value;
1076 er.er_name_len = strlen(name);
1077 er.er_data_len = size;
1078
David Teiglandb3b94fa2006-01-16 16:50:04 +00001079 memset(&es, 0, sizeof(struct ea_set));
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001080 es.es_er = &er;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001081 es.es_el = el;
1082
1083 error = ea_foreach(ip, ea_set_simple, &es);
1084 if (error > 0)
1085 return 0;
1086 if (error)
1087 return error;
1088
Steven Whitehouse383f01f2008-11-04 10:05:22 +00001089 if (!(ip->i_diskflags & GFS2_DIF_EA_INDIRECT))
David Teiglandb3b94fa2006-01-16 16:50:04 +00001090 blks++;
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001091 if (GFS2_EAREQ_SIZE_STUFFED(&er) > GFS2_SB(&ip->i_inode)->sd_jbsize)
1092 blks += DIV_ROUND_UP(er.er_data_len, GFS2_SB(&ip->i_inode)->sd_jbsize);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001093
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001094 return ea_alloc_skeleton(ip, &er, blks, ea_set_block, el);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001095}
1096
1097static int ea_set_remove_unstuffed(struct gfs2_inode *ip,
1098 struct gfs2_ea_location *el)
1099{
1100 if (el->el_prev && GFS2_EA2NEXT(el->el_prev) != el->el_ea) {
1101 el->el_prev = GFS2_EA2NEXT(el->el_prev);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001102 gfs2_assert_withdraw(GFS2_SB(&ip->i_inode),
David Teiglandb3b94fa2006-01-16 16:50:04 +00001103 GFS2_EA2NEXT(el->el_prev) == el->el_ea);
1104 }
1105
Steven Whitehouse86d00632009-09-14 09:50:57 +01001106 return ea_remove_unstuffed(ip, el->el_bh, el->el_ea, el->el_prev, 0);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001107}
1108
David Teiglandb3b94fa2006-01-16 16:50:04 +00001109static int ea_remove_stuffed(struct gfs2_inode *ip, struct gfs2_ea_location *el)
1110{
1111 struct gfs2_ea_header *ea = el->el_ea;
1112 struct gfs2_ea_header *prev = el->el_prev;
1113 struct buffer_head *dibh;
1114 int error;
1115
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001116 error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + RES_EATTR, 0);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001117 if (error)
1118 return error;
1119
Steven Whitehouse350a9b02012-12-14 12:36:02 +00001120 gfs2_trans_add_meta(ip->i_gl, el->el_bh);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001121
1122 if (prev) {
Steven Whitehousecd915492006-09-04 12:49:07 -04001123 u32 len;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001124
1125 len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
1126 prev->ea_rec_len = cpu_to_be32(len);
1127
1128 if (GFS2_EA_IS_LAST(ea))
1129 prev->ea_flags |= GFS2_EAFLAG_LAST;
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001130 } else {
David Teiglandb3b94fa2006-01-16 16:50:04 +00001131 ea->ea_type = GFS2_EATYPE_UNUSED;
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001132 }
David Teiglandb3b94fa2006-01-16 16:50:04 +00001133
1134 error = gfs2_meta_inode_buffer(ip, &dibh);
1135 if (!error) {
Steven Whitehouse4bd91ba2007-06-05 09:39:18 +01001136 ip->i_inode.i_ctime = CURRENT_TIME;
Steven Whitehouse350a9b02012-12-14 12:36:02 +00001137 gfs2_trans_add_meta(ip->i_gl, dibh);
Steven Whitehouse539e5d62006-10-31 15:07:05 -05001138 gfs2_dinode_out(ip, dibh->b_data);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001139 brelse(dibh);
Steven Whitehouse907b9bc2006-09-25 09:26:04 -04001140 }
David Teiglandb3b94fa2006-01-16 16:50:04 +00001141
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001142 gfs2_trans_end(GFS2_SB(&ip->i_inode));
David Teiglandb3b94fa2006-01-16 16:50:04 +00001143
1144 return error;
1145}
1146
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001147/**
1148 * gfs2_xattr_remove - Remove a GFS2 extended attribute
Christoph Hellwig431547b2009-11-13 09:52:56 +00001149 * @ip: The inode
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001150 * @type: The type of the extended attribute
1151 * @name: The name of the extended attribute
1152 *
1153 * This is not called directly by the VFS since we use the (common)
1154 * scheme of making a "set with NULL data" mean a remove request. Note
1155 * that this is different from a set with zero length data.
1156 *
1157 * Returns: 0, or errno on failure
1158 */
1159
Christoph Hellwig431547b2009-11-13 09:52:56 +00001160static int gfs2_xattr_remove(struct gfs2_inode *ip, int type, const char *name)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001161{
1162 struct gfs2_ea_location el;
1163 int error;
1164
Steven Whitehouse3767ac22008-11-03 14:28:42 +00001165 if (!ip->i_eattr)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001166 return -ENODATA;
1167
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001168 error = gfs2_ea_find(ip, type, name, &el);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001169 if (error)
1170 return error;
1171 if (!el.el_ea)
1172 return -ENODATA;
1173
1174 if (GFS2_EA_IS_STUFFED(el.el_ea))
1175 error = ea_remove_stuffed(ip, &el);
1176 else
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001177 error = ea_remove_unstuffed(ip, el.el_bh, el.el_ea, el.el_prev, 0);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001178
1179 brelse(el.el_bh);
1180
1181 return error;
1182}
1183
1184/**
Christoph Hellwig431547b2009-11-13 09:52:56 +00001185 * __gfs2_xattr_set - Set (or remove) a GFS2 extended attribute
1186 * @ip: The inode
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001187 * @name: The name of the extended attribute
1188 * @value: The value of the extended attribute (NULL for remove)
1189 * @size: The size of the @value argument
1190 * @flags: Create or Replace
Christoph Hellwig431547b2009-11-13 09:52:56 +00001191 * @type: The type of the extended attribute
David Teiglandb3b94fa2006-01-16 16:50:04 +00001192 *
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001193 * See gfs2_xattr_remove() for details of the removal of xattrs.
1194 *
1195 * Returns: 0 or errno on failure
David Teiglandb3b94fa2006-01-16 16:50:04 +00001196 */
1197
Christoph Hellwig431547b2009-11-13 09:52:56 +00001198int __gfs2_xattr_set(struct inode *inode, const char *name,
1199 const void *value, size_t size, int flags, int type)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001200{
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001201 struct gfs2_inode *ip = GFS2_I(inode);
Christoph Hellwig431547b2009-11-13 09:52:56 +00001202 struct gfs2_sbd *sdp = GFS2_SB(inode);
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001203 struct gfs2_ea_location el;
1204 unsigned int namel = strlen(name);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001205 int error;
1206
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001207 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
1208 return -EPERM;
1209 if (namel > GFS2_EA_MAX_NAME_LEN)
1210 return -ERANGE;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001211
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001212 if (value == NULL)
Christoph Hellwig431547b2009-11-13 09:52:56 +00001213 return gfs2_xattr_remove(ip, type, name);
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001214
1215 if (ea_check_size(sdp, namel, size))
1216 return -ERANGE;
1217
1218 if (!ip->i_eattr) {
1219 if (flags & XATTR_REPLACE)
1220 return -ENODATA;
1221 return ea_init(ip, type, name, value, size);
1222 }
1223
1224 error = gfs2_ea_find(ip, type, name, &el);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001225 if (error)
1226 return error;
1227
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001228 if (el.el_ea) {
1229 if (ip->i_diskflags & GFS2_DIF_APPENDONLY) {
1230 brelse(el.el_bh);
1231 return -EPERM;
1232 }
David Teiglandb3b94fa2006-01-16 16:50:04 +00001233
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001234 error = -EEXIST;
1235 if (!(flags & XATTR_CREATE)) {
1236 int unstuffed = !GFS2_EA_IS_STUFFED(el.el_ea);
1237 error = ea_set_i(ip, type, name, value, size, &el);
1238 if (!error && unstuffed)
1239 ea_set_remove_unstuffed(ip, &el);
1240 }
1241
1242 brelse(el.el_bh);
1243 return error;
1244 }
1245
1246 error = -ENODATA;
1247 if (!(flags & XATTR_REPLACE))
1248 error = ea_set_i(ip, type, name, value, size, NULL);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001249
1250 return error;
1251}
1252
Andreas Gruenbacherd9a82a02015-10-04 19:18:51 +02001253static int gfs2_xattr_set(const struct xattr_handler *handler,
Al Viro59301222016-05-27 10:19:30 -04001254 struct dentry *unused, struct inode *inode,
1255 const char *name, const void *value,
1256 size_t size, int flags)
Christoph Hellwig431547b2009-11-13 09:52:56 +00001257{
Al Viro1a39ba92016-05-13 03:59:17 +02001258 struct gfs2_inode *ip = GFS2_I(inode);
1259 struct gfs2_holder gh;
1260 int ret;
1261
1262 ret = gfs2_rsqa_alloc(ip);
1263 if (ret)
1264 return ret;
1265
1266 ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
1267 if (ret)
1268 return ret;
1269 ret = __gfs2_xattr_set(inode, name, value, size, flags, handler->flags);
1270 gfs2_glock_dq_uninit(&gh);
1271 return ret;
Christoph Hellwig431547b2009-11-13 09:52:56 +00001272}
1273
David Teiglandb3b94fa2006-01-16 16:50:04 +00001274static int ea_dealloc_indirect(struct gfs2_inode *ip)
1275{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001276 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001277 struct gfs2_rgrp_list rlist;
1278 struct buffer_head *indbh, *dibh;
Al Virob44b84d2006-10-14 10:46:30 -04001279 __be64 *eablk, *end;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001280 unsigned int rg_blocks = 0;
Steven Whitehousecd915492006-09-04 12:49:07 -04001281 u64 bstart = 0;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001282 unsigned int blen = 0;
1283 unsigned int blks = 0;
1284 unsigned int x;
1285 int error;
1286
Bob Peterson5e2f7d62012-04-04 22:11:16 -04001287 error = gfs2_rindex_update(sdp);
1288 if (error)
1289 return error;
1290
David Teiglandb3b94fa2006-01-16 16:50:04 +00001291 memset(&rlist, 0, sizeof(struct gfs2_rgrp_list));
1292
Andreas Gruenbacherc8d57702015-11-11 15:00:35 -06001293 error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT, 0, &indbh);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001294 if (error)
1295 return error;
1296
1297 if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) {
1298 error = -EIO;
1299 goto out;
1300 }
1301
Al Virob44b84d2006-10-14 10:46:30 -04001302 eablk = (__be64 *)(indbh->b_data + sizeof(struct gfs2_meta_header));
David Teiglandb3b94fa2006-01-16 16:50:04 +00001303 end = eablk + sdp->sd_inptrs;
1304
1305 for (; eablk < end; eablk++) {
Steven Whitehousecd915492006-09-04 12:49:07 -04001306 u64 bn;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001307
1308 if (!*eablk)
1309 break;
1310 bn = be64_to_cpu(*eablk);
1311
1312 if (bstart + blen == bn)
1313 blen++;
1314 else {
1315 if (bstart)
Steven Whitehouse70b0c362011-09-02 16:08:09 +01001316 gfs2_rlist_add(ip, &rlist, bstart);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001317 bstart = bn;
1318 blen = 1;
1319 }
1320 blks++;
1321 }
1322 if (bstart)
Steven Whitehouse70b0c362011-09-02 16:08:09 +01001323 gfs2_rlist_add(ip, &rlist, bstart);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001324 else
1325 goto out;
1326
Bob Petersonfe6c9912008-01-28 11:13:02 -06001327 gfs2_rlist_alloc(&rlist, LM_ST_EXCLUSIVE);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001328
1329 for (x = 0; x < rlist.rl_rgrps; x++) {
1330 struct gfs2_rgrpd *rgd;
Steven Whitehouse5c676f62006-02-27 17:23:27 -05001331 rgd = rlist.rl_ghs[x].gh_gl->gl_object;
Steven Whitehousebb8d8a62007-06-01 14:11:58 +01001332 rg_blocks += rgd->rd_length;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001333 }
1334
1335 error = gfs2_glock_nq_m(rlist.rl_rgrps, rlist.rl_ghs);
1336 if (error)
1337 goto out_rlist_free;
1338
Steven Whitehousecca195c2006-09-05 13:15:18 -04001339 error = gfs2_trans_begin(sdp, rg_blocks + RES_DINODE + RES_INDIRECT +
1340 RES_STATFS + RES_QUOTA, blks);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001341 if (error)
1342 goto out_gunlock;
1343
Steven Whitehouse350a9b02012-12-14 12:36:02 +00001344 gfs2_trans_add_meta(ip->i_gl, indbh);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001345
Al Virob44b84d2006-10-14 10:46:30 -04001346 eablk = (__be64 *)(indbh->b_data + sizeof(struct gfs2_meta_header));
David Teiglandb3b94fa2006-01-16 16:50:04 +00001347 bstart = 0;
1348 blen = 0;
1349
1350 for (; eablk < end; eablk++) {
Steven Whitehousecd915492006-09-04 12:49:07 -04001351 u64 bn;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001352
1353 if (!*eablk)
1354 break;
1355 bn = be64_to_cpu(*eablk);
1356
1357 if (bstart + blen == bn)
1358 blen++;
1359 else {
1360 if (bstart)
1361 gfs2_free_meta(ip, bstart, blen);
1362 bstart = bn;
1363 blen = 1;
1364 }
1365
1366 *eablk = 0;
Steven Whitehouse77658aa2008-02-12 14:17:27 +00001367 gfs2_add_inode_blocks(&ip->i_inode, -1);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001368 }
1369 if (bstart)
1370 gfs2_free_meta(ip, bstart, blen);
1371
Steven Whitehouse383f01f2008-11-04 10:05:22 +00001372 ip->i_diskflags &= ~GFS2_DIF_EA_INDIRECT;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001373
1374 error = gfs2_meta_inode_buffer(ip, &dibh);
1375 if (!error) {
Steven Whitehouse350a9b02012-12-14 12:36:02 +00001376 gfs2_trans_add_meta(ip->i_gl, dibh);
Steven Whitehouse539e5d62006-10-31 15:07:05 -05001377 gfs2_dinode_out(ip, dibh->b_data);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001378 brelse(dibh);
1379 }
1380
1381 gfs2_trans_end(sdp);
1382
Steven Whitehousea91ea692006-09-04 12:04:26 -04001383out_gunlock:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001384 gfs2_glock_dq_m(rlist.rl_rgrps, rlist.rl_ghs);
Steven Whitehousea91ea692006-09-04 12:04:26 -04001385out_rlist_free:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001386 gfs2_rlist_free(&rlist);
Steven Whitehousea91ea692006-09-04 12:04:26 -04001387out:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001388 brelse(indbh);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001389 return error;
1390}
1391
1392static int ea_dealloc_block(struct gfs2_inode *ip)
1393{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001394 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001395 struct gfs2_rgrpd *rgd;
1396 struct buffer_head *dibh;
Bob Peterson564e12b2011-11-21 13:36:17 -05001397 struct gfs2_holder gh;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001398 int error;
1399
Bob Peterson5e2f7d62012-04-04 22:11:16 -04001400 error = gfs2_rindex_update(sdp);
1401 if (error)
1402 return error;
1403
Steven Whitehouse66fc0612012-02-08 12:58:32 +00001404 rgd = gfs2_blk2rgrpd(sdp, ip->i_eattr, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001405 if (!rgd) {
1406 gfs2_consist_inode(ip);
1407 return -EIO;
1408 }
1409
Bob Peterson564e12b2011-11-21 13:36:17 -05001410 error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &gh);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001411 if (error)
1412 return error;
1413
Steven Whitehousecca195c2006-09-05 13:15:18 -04001414 error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_DINODE + RES_STATFS +
1415 RES_QUOTA, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001416 if (error)
1417 goto out_gunlock;
1418
Steven Whitehouse3767ac22008-11-03 14:28:42 +00001419 gfs2_free_meta(ip, ip->i_eattr, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001420
Steven Whitehouse3767ac22008-11-03 14:28:42 +00001421 ip->i_eattr = 0;
Steven Whitehouse77658aa2008-02-12 14:17:27 +00001422 gfs2_add_inode_blocks(&ip->i_inode, -1);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001423
1424 error = gfs2_meta_inode_buffer(ip, &dibh);
1425 if (!error) {
Steven Whitehouse350a9b02012-12-14 12:36:02 +00001426 gfs2_trans_add_meta(ip->i_gl, dibh);
Steven Whitehouse539e5d62006-10-31 15:07:05 -05001427 gfs2_dinode_out(ip, dibh->b_data);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001428 brelse(dibh);
1429 }
1430
1431 gfs2_trans_end(sdp);
1432
Steven Whitehousea91ea692006-09-04 12:04:26 -04001433out_gunlock:
Bob Peterson564e12b2011-11-21 13:36:17 -05001434 gfs2_glock_dq_uninit(&gh);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001435 return error;
1436}
1437
1438/**
1439 * gfs2_ea_dealloc - deallocate the extended attribute fork
1440 * @ip: the inode
1441 *
1442 * Returns: errno
1443 */
1444
1445int gfs2_ea_dealloc(struct gfs2_inode *ip)
1446{
David Teiglandb3b94fa2006-01-16 16:50:04 +00001447 int error;
1448
Bob Peterson8e2e0042012-07-19 08:12:40 -04001449 error = gfs2_rindex_update(GFS2_SB(&ip->i_inode));
1450 if (error)
1451 return error;
1452
Eric W. Biedermanf4108a62013-01-31 17:49:26 -08001453 error = gfs2_quota_hold(ip, NO_UID_QUOTA_CHANGE, NO_GID_QUOTA_CHANGE);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001454 if (error)
Bob Peterson5407e242012-05-18 09:28:23 -04001455 return error;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001456
David Teiglandb3b94fa2006-01-16 16:50:04 +00001457 error = ea_foreach(ip, ea_dealloc_unstuffed, NULL);
1458 if (error)
Steven Whitehouse8339ee52011-08-31 16:38:29 +01001459 goto out_quota;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001460
Steven Whitehouse383f01f2008-11-04 10:05:22 +00001461 if (ip->i_diskflags & GFS2_DIF_EA_INDIRECT) {
David Teiglandb3b94fa2006-01-16 16:50:04 +00001462 error = ea_dealloc_indirect(ip);
1463 if (error)
Steven Whitehouse8339ee52011-08-31 16:38:29 +01001464 goto out_quota;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001465 }
1466
1467 error = ea_dealloc_block(ip);
1468
Steven Whitehousea91ea692006-09-04 12:04:26 -04001469out_quota:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001470 gfs2_quota_unhold(ip);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001471 return error;
1472}
1473
Stephen Hemmingerb7bb0a12010-05-13 17:53:23 -07001474static const struct xattr_handler gfs2_xattr_user_handler = {
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001475 .prefix = XATTR_USER_PREFIX,
Christoph Hellwig431547b2009-11-13 09:52:56 +00001476 .flags = GFS2_EATYPE_USR,
1477 .get = gfs2_xattr_get,
1478 .set = gfs2_xattr_set,
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001479};
1480
Stephen Hemmingerb7bb0a12010-05-13 17:53:23 -07001481static const struct xattr_handler gfs2_xattr_security_handler = {
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001482 .prefix = XATTR_SECURITY_PREFIX,
Christoph Hellwig431547b2009-11-13 09:52:56 +00001483 .flags = GFS2_EATYPE_SECURITY,
1484 .get = gfs2_xattr_get,
1485 .set = gfs2_xattr_set,
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001486};
1487
Stephen Hemmingerb7bb0a12010-05-13 17:53:23 -07001488const struct xattr_handler *gfs2_xattr_handlers[] = {
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001489 &gfs2_xattr_user_handler,
1490 &gfs2_xattr_security_handler,
Christoph Hellwige01580b2013-12-20 05:16:52 -08001491 &posix_acl_access_xattr_handler,
1492 &posix_acl_default_xattr_handler,
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001493 NULL,
1494};
1495