blob: 05de2095465926d5be73f58012011b608ae1690e [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>
Linus Torvalds7c0f6ba2016-12-24 11:46:01 -080017#include <linux/uaccess.h>
David Teiglandb3b94fa2006-01-16 16:50:04 +000018
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"
Bob Peterson27c3b412017-08-18 09:15:13 -050028#include "super.h"
David Teiglandb3b94fa2006-01-16 16:50:04 +000029#include "trans.h"
Steven Whitehouse5c676f62006-02-27 17:23:27 -050030#include "util.h"
David Teiglandb3b94fa2006-01-16 16:50:04 +000031
32/**
33 * ea_calc_size - returns the acutal number of bytes the request will take up
34 * (not counting any unstuffed data blocks)
35 * @sdp:
36 * @er:
37 * @size:
38 *
39 * Returns: 1 if the EA should be stuffed
40 */
41
Steven Whitehouse40b78a32009-08-26 18:41:32 +010042static int ea_calc_size(struct gfs2_sbd *sdp, unsigned int nsize, size_t dsize,
David Teiglandb3b94fa2006-01-16 16:50:04 +000043 unsigned int *size)
44{
Steven Whitehouse40b78a32009-08-26 18:41:32 +010045 unsigned int jbsize = sdp->sd_jbsize;
46
47 /* Stuffed */
48 *size = ALIGN(sizeof(struct gfs2_ea_header) + nsize + dsize, 8);
49
50 if (*size <= jbsize)
David Teiglandb3b94fa2006-01-16 16:50:04 +000051 return 1;
52
Steven Whitehouse40b78a32009-08-26 18:41:32 +010053 /* Unstuffed */
54 *size = ALIGN(sizeof(struct gfs2_ea_header) + nsize +
55 (sizeof(__be64) * DIV_ROUND_UP(dsize, jbsize)), 8);
David Teiglandb3b94fa2006-01-16 16:50:04 +000056
57 return 0;
58}
59
Steven Whitehouse40b78a32009-08-26 18:41:32 +010060static int ea_check_size(struct gfs2_sbd *sdp, unsigned int nsize, size_t dsize)
David Teiglandb3b94fa2006-01-16 16:50:04 +000061{
62 unsigned int size;
63
Steven Whitehouse40b78a32009-08-26 18:41:32 +010064 if (dsize > GFS2_EA_MAX_DATA_LEN)
David Teiglandb3b94fa2006-01-16 16:50:04 +000065 return -ERANGE;
66
Steven Whitehouse40b78a32009-08-26 18:41:32 +010067 ea_calc_size(sdp, nsize, dsize, &size);
David Teiglandb3b94fa2006-01-16 16:50:04 +000068
69 /* This can only happen with 512 byte blocks */
70 if (size > sdp->sd_jbsize)
71 return -ERANGE;
72
73 return 0;
74}
75
Steven Whitehousecca195c2006-09-05 13:15:18 -040076typedef int (*ea_call_t) (struct gfs2_inode *ip, struct buffer_head *bh,
David Teiglandb3b94fa2006-01-16 16:50:04 +000077 struct gfs2_ea_header *ea,
Steven Whitehousecca195c2006-09-05 13:15:18 -040078 struct gfs2_ea_header *prev, void *private);
David Teiglandb3b94fa2006-01-16 16:50:04 +000079
80static int ea_foreach_i(struct gfs2_inode *ip, struct buffer_head *bh,
81 ea_call_t ea_call, void *data)
82{
83 struct gfs2_ea_header *ea, *prev = NULL;
84 int error = 0;
85
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -040086 if (gfs2_metatype_check(GFS2_SB(&ip->i_inode), bh, GFS2_METATYPE_EA))
David Teiglandb3b94fa2006-01-16 16:50:04 +000087 return -EIO;
88
89 for (ea = GFS2_EA_BH2FIRST(bh);; prev = ea, ea = GFS2_EA2NEXT(ea)) {
90 if (!GFS2_EA_REC_LEN(ea))
91 goto fail;
Steven Whitehousecca195c2006-09-05 13:15:18 -040092 if (!(bh->b_data <= (char *)ea && (char *)GFS2_EA2NEXT(ea) <=
93 bh->b_data + bh->b_size))
David Teiglandb3b94fa2006-01-16 16:50:04 +000094 goto fail;
95 if (!GFS2_EATYPE_VALID(ea->ea_type))
96 goto fail;
97
98 error = ea_call(ip, bh, ea, prev, data);
99 if (error)
100 return error;
101
102 if (GFS2_EA_IS_LAST(ea)) {
103 if ((char *)GFS2_EA2NEXT(ea) !=
104 bh->b_data + bh->b_size)
105 goto fail;
106 break;
107 }
108 }
109
110 return error;
111
Steven Whitehousea91ea692006-09-04 12:04:26 -0400112fail:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000113 gfs2_consist_inode(ip);
114 return -EIO;
115}
116
117static int ea_foreach(struct gfs2_inode *ip, ea_call_t ea_call, void *data)
118{
119 struct buffer_head *bh, *eabh;
Al Virob44b84d2006-10-14 10:46:30 -0400120 __be64 *eablk, *end;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000121 int error;
122
Andreas Gruenbacherc8d57702015-11-11 15:00:35 -0600123 error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT, 0, &bh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000124 if (error)
125 return error;
126
Steven Whitehouse383f01f2008-11-04 10:05:22 +0000127 if (!(ip->i_diskflags & GFS2_DIF_EA_INDIRECT)) {
David Teiglandb3b94fa2006-01-16 16:50:04 +0000128 error = ea_foreach_i(ip, bh, ea_call, data);
129 goto out;
130 }
131
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400132 if (gfs2_metatype_check(GFS2_SB(&ip->i_inode), bh, GFS2_METATYPE_IN)) {
David Teiglandb3b94fa2006-01-16 16:50:04 +0000133 error = -EIO;
134 goto out;
135 }
136
Al Virob44b84d2006-10-14 10:46:30 -0400137 eablk = (__be64 *)(bh->b_data + sizeof(struct gfs2_meta_header));
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400138 end = eablk + GFS2_SB(&ip->i_inode)->sd_inptrs;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000139
140 for (; eablk < end; eablk++) {
Steven Whitehousecd915492006-09-04 12:49:07 -0400141 u64 bn;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000142
143 if (!*eablk)
144 break;
145 bn = be64_to_cpu(*eablk);
146
Andreas Gruenbacherc8d57702015-11-11 15:00:35 -0600147 error = gfs2_meta_read(ip->i_gl, bn, DIO_WAIT, 0, &eabh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000148 if (error)
149 break;
150 error = ea_foreach_i(ip, eabh, ea_call, data);
151 brelse(eabh);
152 if (error)
153 break;
154 }
Steven Whitehousea91ea692006-09-04 12:04:26 -0400155out:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000156 brelse(bh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000157 return error;
158}
159
160struct ea_find {
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100161 int type;
162 const char *name;
163 size_t namel;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000164 struct gfs2_ea_location *ef_el;
165};
166
167static int ea_find_i(struct gfs2_inode *ip, struct buffer_head *bh,
168 struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
169 void *private)
170{
171 struct ea_find *ef = private;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000172
173 if (ea->ea_type == GFS2_EATYPE_UNUSED)
174 return 0;
175
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100176 if (ea->ea_type == ef->type) {
177 if (ea->ea_name_len == ef->namel &&
178 !memcmp(GFS2_EA2NAME(ea), ef->name, ea->ea_name_len)) {
David Teiglandb3b94fa2006-01-16 16:50:04 +0000179 struct gfs2_ea_location *el = ef->ef_el;
180 get_bh(bh);
181 el->el_bh = bh;
182 el->el_ea = ea;
183 el->el_prev = prev;
184 return 1;
185 }
186 }
187
David Teiglandb3b94fa2006-01-16 16:50:04 +0000188 return 0;
189}
190
Steven Whitehouse479c4272009-10-02 12:00:00 +0100191static int gfs2_ea_find(struct gfs2_inode *ip, int type, const char *name,
192 struct gfs2_ea_location *el)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000193{
194 struct ea_find ef;
195 int error;
196
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100197 ef.type = type;
198 ef.name = name;
199 ef.namel = strlen(name);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000200 ef.ef_el = el;
201
202 memset(el, 0, sizeof(struct gfs2_ea_location));
203
204 error = ea_foreach(ip, ea_find_i, &ef);
205 if (error > 0)
206 return 0;
207
208 return error;
209}
210
211/**
212 * ea_dealloc_unstuffed -
213 * @ip:
214 * @bh:
215 * @ea:
216 * @prev:
217 * @private:
218 *
219 * Take advantage of the fact that all unstuffed blocks are
220 * allocated from the same RG. But watch, this may not always
221 * be true.
222 *
223 * Returns: errno
224 */
225
226static int ea_dealloc_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh,
227 struct gfs2_ea_header *ea,
228 struct gfs2_ea_header *prev, void *private)
229{
230 int *leave = private;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400231 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000232 struct gfs2_rgrpd *rgd;
233 struct gfs2_holder rg_gh;
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
Andreas Gruenbacher6862c442017-10-04 16:21:19 +0200310 ip->i_inode.i_ctime = current_time(&ip->i_inode);
311 __mark_inode_dirty(&ip->i_inode, I_DIRTY_SYNC | I_DIRTY_DATASYNC);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000312
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{
David Teiglandb3b94fa2006-01-16 16:50:04 +0000324 int error;
325
Bob Peterson8e2e0042012-07-19 08:12:40 -0400326 error = gfs2_rindex_update(GFS2_SB(&ip->i_inode));
327 if (error)
328 return error;
329
Eric W. Biedermanf4108a62013-01-31 17:49:26 -0800330 error = gfs2_quota_hold(ip, NO_UID_QUOTA_CHANGE, NO_GID_QUOTA_CHANGE);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000331 if (error)
332 goto out_alloc;
333
Steven Whitehousecca195c2006-09-05 13:15:18 -0400334 error = ea_dealloc_unstuffed(ip, bh, ea, prev, (leave) ? &error : NULL);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000335
David Teiglandb3b94fa2006-01-16 16:50:04 +0000336 gfs2_quota_unhold(ip);
Steven Whitehousea91ea692006-09-04 12:04:26 -0400337out_alloc:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000338 return error;
339}
340
David Teiglandb3b94fa2006-01-16 16:50:04 +0000341struct ea_list {
342 struct gfs2_ea_request *ei_er;
343 unsigned int ei_size;
344};
345
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100346static inline unsigned int gfs2_ea_strlen(struct gfs2_ea_header *ea)
347{
348 switch (ea->ea_type) {
349 case GFS2_EATYPE_USR:
350 return 5 + ea->ea_name_len + 1;
351 case GFS2_EATYPE_SYS:
352 return 7 + ea->ea_name_len + 1;
353 case GFS2_EATYPE_SECURITY:
354 return 9 + ea->ea_name_len + 1;
355 default:
356 return 0;
357 }
358}
359
David Teiglandb3b94fa2006-01-16 16:50:04 +0000360static int ea_list_i(struct gfs2_inode *ip, struct buffer_head *bh,
361 struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
362 void *private)
363{
364 struct ea_list *ei = private;
365 struct gfs2_ea_request *er = ei->ei_er;
Ryan O'Hara639b6d72006-05-22 10:08:35 -0400366 unsigned int ea_size = gfs2_ea_strlen(ea);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000367
368 if (ea->ea_type == GFS2_EATYPE_UNUSED)
369 return 0;
370
371 if (er->er_data_len) {
Steven Whitehouse01eb7c02006-06-06 17:31:30 -0400372 char *prefix = NULL;
373 unsigned int l = 0;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000374 char c = 0;
375
376 if (ei->ei_size + ea_size > er->er_data_len)
377 return -ERANGE;
378
Ryan O'Hara639b6d72006-05-22 10:08:35 -0400379 switch (ea->ea_type) {
380 case GFS2_EATYPE_USR:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000381 prefix = "user.";
382 l = 5;
Ryan O'Hara639b6d72006-05-22 10:08:35 -0400383 break;
384 case GFS2_EATYPE_SYS:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000385 prefix = "system.";
386 l = 7;
Ryan O'Hara639b6d72006-05-22 10:08:35 -0400387 break;
388 case GFS2_EATYPE_SECURITY:
389 prefix = "security.";
390 l = 9;
391 break;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000392 }
393
Steven Whitehouse01eb7c02006-06-06 17:31:30 -0400394 BUG_ON(l == 0);
395
Steven Whitehouse90cdd202006-05-22 10:36:25 -0400396 memcpy(er->er_data + ei->ei_size, prefix, l);
397 memcpy(er->er_data + ei->ei_size + l, GFS2_EA2NAME(ea),
David Teiglandb3b94fa2006-01-16 16:50:04 +0000398 ea->ea_name_len);
Steven Whitehouse90cdd202006-05-22 10:36:25 -0400399 memcpy(er->er_data + ei->ei_size + ea_size - 1, &c, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000400 }
401
402 ei->ei_size += ea_size;
403
404 return 0;
405}
406
407/**
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100408 * gfs2_listxattr - List gfs2 extended attributes
409 * @dentry: The dentry whose inode we are interested in
410 * @buffer: The buffer to write the results
411 * @size: The size of the buffer
David Teiglandb3b94fa2006-01-16 16:50:04 +0000412 *
413 * Returns: actual size of data on success, -errno on error
414 */
415
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100416ssize_t gfs2_listxattr(struct dentry *dentry, char *buffer, size_t size)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000417{
David Howells2b0143b2015-03-17 22:25:59 +0000418 struct gfs2_inode *ip = GFS2_I(d_inode(dentry));
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100419 struct gfs2_ea_request er;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000420 struct gfs2_holder i_gh;
421 int error;
422
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100423 memset(&er, 0, sizeof(struct gfs2_ea_request));
424 if (size) {
425 er.er_data = buffer;
426 er.er_data_len = size;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000427 }
428
Steven Whitehousecca195c2006-09-05 13:15:18 -0400429 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000430 if (error)
431 return error;
432
Steven Whitehouse3767ac22008-11-03 14:28:42 +0000433 if (ip->i_eattr) {
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100434 struct ea_list ei = { .ei_er = &er, .ei_size = 0 };
David Teiglandb3b94fa2006-01-16 16:50:04 +0000435
436 error = ea_foreach(ip, ea_list_i, &ei);
437 if (!error)
438 error = ei.ei_size;
439 }
440
441 gfs2_glock_dq_uninit(&i_gh);
442
443 return error;
444}
445
446/**
Steven Whitehouse1f981692012-07-26 11:26:36 +0100447 * ea_iter_unstuffed - copies the unstuffed xattr data to/from the
448 * request buffer
Steven Whitehousecca195c2006-09-05 13:15:18 -0400449 * @ip: The GFS2 inode
450 * @ea: The extended attribute header structure
Steven Whitehouse1f981692012-07-26 11:26:36 +0100451 * @din: The data to be copied in
452 * @dout: The data to be copied out (one of din,dout will be NULL)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000453 *
454 * Returns: errno
455 */
456
Steven Whitehouse1f981692012-07-26 11:26:36 +0100457static int gfs2_iter_unstuffed(struct gfs2_inode *ip, struct gfs2_ea_header *ea,
458 const char *din, char *dout)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000459{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400460 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000461 struct buffer_head **bh;
462 unsigned int amount = GFS2_EA_DATA_LEN(ea);
Steven Whitehouse5c676f62006-02-27 17:23:27 -0500463 unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize);
Al Virob44b84d2006-10-14 10:46:30 -0400464 __be64 *dataptrs = GFS2_EA2DATAPTRS(ea);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000465 unsigned int x;
466 int error = 0;
Steven Whitehouse1f981692012-07-26 11:26:36 +0100467 unsigned char *pos;
468 unsigned cp_size;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000469
Josef Bacik16c5f062008-04-09 09:33:41 -0400470 bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_NOFS);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000471 if (!bh)
472 return -ENOMEM;
473
474 for (x = 0; x < nptrs; x++) {
Andreas Gruenbacherc8d57702015-11-11 15:00:35 -0600475 error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs), 0, 0,
Steven Whitehouse7276b3b2006-09-21 17:05:23 -0400476 bh + x);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000477 if (error) {
478 while (x--)
479 brelse(bh[x]);
480 goto out;
481 }
482 dataptrs++;
483 }
484
485 for (x = 0; x < nptrs; x++) {
Steven Whitehouse7276b3b2006-09-21 17:05:23 -0400486 error = gfs2_meta_wait(sdp, bh[x]);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000487 if (error) {
488 for (; x < nptrs; x++)
489 brelse(bh[x]);
490 goto out;
491 }
492 if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) {
493 for (; x < nptrs; x++)
494 brelse(bh[x]);
495 error = -EIO;
496 goto out;
497 }
498
Steven Whitehouse1f981692012-07-26 11:26:36 +0100499 pos = bh[x]->b_data + sizeof(struct gfs2_meta_header);
500 cp_size = (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize;
501
502 if (dout) {
503 memcpy(dout, pos, cp_size);
504 dout += sdp->sd_jbsize;
505 }
506
507 if (din) {
Steven Whitehouse350a9b02012-12-14 12:36:02 +0000508 gfs2_trans_add_meta(ip->i_gl, bh[x]);
Steven Whitehouse1f981692012-07-26 11:26:36 +0100509 memcpy(pos, din, cp_size);
510 din += sdp->sd_jbsize;
511 }
David Teiglandb3b94fa2006-01-16 16:50:04 +0000512
513 amount -= sdp->sd_jbsize;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000514 brelse(bh[x]);
515 }
516
Steven Whitehousea91ea692006-09-04 12:04:26 -0400517out:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000518 kfree(bh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000519 return error;
520}
521
Steven Whitehouse479c4272009-10-02 12:00:00 +0100522static int gfs2_ea_get_copy(struct gfs2_inode *ip, struct gfs2_ea_location *el,
523 char *data, size_t size)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000524{
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100525 int ret;
526 size_t len = GFS2_EA_DATA_LEN(el->el_ea);
527 if (len > size)
528 return -ERANGE;
529
David Teiglandb3b94fa2006-01-16 16:50:04 +0000530 if (GFS2_EA_IS_STUFFED(el->el_ea)) {
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100531 memcpy(data, GFS2_EA2DATA(el->el_ea), len);
532 return len;
533 }
Steven Whitehouse1f981692012-07-26 11:26:36 +0100534 ret = gfs2_iter_unstuffed(ip, el->el_ea, NULL, data);
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100535 if (ret < 0)
536 return ret;
537 return len;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000538}
539
Steven Whitehouse479c4272009-10-02 12:00:00 +0100540int gfs2_xattr_acl_get(struct gfs2_inode *ip, const char *name, char **ppdata)
541{
542 struct gfs2_ea_location el;
543 int error;
544 int len;
545 char *data;
546
547 error = gfs2_ea_find(ip, GFS2_EATYPE_SYS, name, &el);
548 if (error)
549 return error;
550 if (!el.el_ea)
551 goto out;
552 if (!GFS2_EA_DATA_LEN(el.el_ea))
553 goto out;
554
555 len = GFS2_EA_DATA_LEN(el.el_ea);
556 data = kmalloc(len, GFP_NOFS);
557 error = -ENOMEM;
558 if (data == NULL)
559 goto out;
560
561 error = gfs2_ea_get_copy(ip, &el, data, len);
Steven Whitehouse114b80c2011-11-09 12:54:43 +0000562 if (error < 0)
563 kfree(data);
564 else
565 *ppdata = data;
Steven Whitehouse479c4272009-10-02 12:00:00 +0100566out:
567 brelse(el.el_bh);
568 return error;
569}
570
David Teiglandb3b94fa2006-01-16 16:50:04 +0000571/**
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100572 * gfs2_xattr_get - Get a GFS2 extended attribute
573 * @inode: The inode
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100574 * @name: The name of the extended attribute
575 * @buffer: The buffer to write the result into
576 * @size: The size of the buffer
Christoph Hellwig431547b2009-11-13 09:52:56 +0000577 * @type: The type of extended attribute
David Teiglandb3b94fa2006-01-16 16:50:04 +0000578 *
579 * Returns: actual size of data on success, -errno on error
580 */
Al Viro1a39ba92016-05-13 03:59:17 +0200581static int __gfs2_xattr_get(struct inode *inode, const char *name,
582 void *buffer, size_t size, int type)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000583{
Al Virob2968212016-04-10 20:48:24 -0400584 struct gfs2_inode *ip = GFS2_I(inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000585 struct gfs2_ea_location el;
586 int error;
587
Steven Whitehouse3767ac22008-11-03 14:28:42 +0000588 if (!ip->i_eattr)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000589 return -ENODATA;
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100590 if (strlen(name) > GFS2_EA_MAX_NAME_LEN)
591 return -EINVAL;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000592
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100593 error = gfs2_ea_find(ip, type, name, &el);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000594 if (error)
595 return error;
596 if (!el.el_ea)
597 return -ENODATA;
Steven Whitehouse86d00632009-09-14 09:50:57 +0100598 if (size)
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100599 error = gfs2_ea_get_copy(ip, &el, buffer, size);
600 else
David Teiglandb3b94fa2006-01-16 16:50:04 +0000601 error = GFS2_EA_DATA_LEN(el.el_ea);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000602 brelse(el.el_bh);
603
604 return error;
605}
606
Al Viro1a39ba92016-05-13 03:59:17 +0200607static int gfs2_xattr_get(const struct xattr_handler *handler,
608 struct dentry *unused, struct inode *inode,
609 const char *name, void *buffer, size_t size)
610{
611 struct gfs2_inode *ip = GFS2_I(inode);
612 struct gfs2_holder gh;
Al Viro1a39ba92016-05-13 03:59:17 +0200613 int ret;
614
615 /* During lookup, SELinux calls this function with the glock locked. */
616
617 if (!gfs2_glock_is_locked_by_me(ip->i_gl)) {
618 ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh);
619 if (ret)
620 return ret;
Andreas Gruenbacherd0920a92017-10-13 00:39:38 +0200621 } else {
622 gfs2_holder_mark_uninitialized(&gh);
Al Viro1a39ba92016-05-13 03:59:17 +0200623 }
624 ret = __gfs2_xattr_get(inode, name, buffer, size, handler->flags);
Andreas Gruenbacherd0920a92017-10-13 00:39:38 +0200625 if (gfs2_holder_initialized(&gh))
Al Viro1a39ba92016-05-13 03:59:17 +0200626 gfs2_glock_dq_uninit(&gh);
627 return ret;
628}
629
David Teiglandb3b94fa2006-01-16 16:50:04 +0000630/**
David Teiglandb3b94fa2006-01-16 16:50:04 +0000631 * ea_alloc_blk - allocates a new block for extended attributes.
632 * @ip: A pointer to the inode that's getting extended attributes
Steven Whitehousecca195c2006-09-05 13:15:18 -0400633 * @bhp: Pointer to pointer to a struct buffer_head
David Teiglandb3b94fa2006-01-16 16:50:04 +0000634 *
635 * Returns: errno
636 */
637
638static int ea_alloc_blk(struct gfs2_inode *ip, struct buffer_head **bhp)
639{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400640 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000641 struct gfs2_ea_header *ea;
Steven Whitehouseb45e41d2008-02-06 10:11:15 +0000642 unsigned int n = 1;
Steven Whitehousecd915492006-09-04 12:49:07 -0400643 u64 block;
Steven Whitehouse09010972009-05-20 10:48:47 +0100644 int error;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000645
Bob Peterson6e87ed02011-11-18 10:58:32 -0500646 error = gfs2_alloc_blocks(ip, &block, &n, 0, NULL);
Steven Whitehouse09010972009-05-20 10:48:47 +0100647 if (error)
648 return error;
Steven Whitehouse5731be52008-02-01 13:16:55 +0000649 gfs2_trans_add_unrevoke(sdp, block, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000650 *bhp = gfs2_meta_new(ip->i_gl, block);
Steven Whitehouse350a9b02012-12-14 12:36:02 +0000651 gfs2_trans_add_meta(ip->i_gl, *bhp);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000652 gfs2_metatype_set(*bhp, GFS2_METATYPE_EA, GFS2_FORMAT_EA);
653 gfs2_buffer_clear_tail(*bhp, sizeof(struct gfs2_meta_header));
654
655 ea = GFS2_EA_BH2FIRST(*bhp);
656 ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize);
657 ea->ea_type = GFS2_EATYPE_UNUSED;
658 ea->ea_flags = GFS2_EAFLAG_LAST;
659 ea->ea_num_ptrs = 0;
660
Steven Whitehouse77658aa2008-02-12 14:17:27 +0000661 gfs2_add_inode_blocks(&ip->i_inode, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000662
663 return 0;
664}
665
666/**
667 * ea_write - writes the request info to an ea, creating new blocks if
668 * necessary
Steven Whitehousecca195c2006-09-05 13:15:18 -0400669 * @ip: inode that is being modified
670 * @ea: the location of the new ea in a block
David Teiglandb3b94fa2006-01-16 16:50:04 +0000671 * @er: the write request
672 *
673 * Note: does not update ea_rec_len or the GFS2_EAFLAG_LAST bin of ea_flags
674 *
675 * returns : errno
676 */
677
678static int ea_write(struct gfs2_inode *ip, struct gfs2_ea_header *ea,
679 struct gfs2_ea_request *er)
680{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400681 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
Steven Whitehouse09010972009-05-20 10:48:47 +0100682 int error;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000683
684 ea->ea_data_len = cpu_to_be32(er->er_data_len);
685 ea->ea_name_len = er->er_name_len;
686 ea->ea_type = er->er_type;
687 ea->__pad = 0;
688
689 memcpy(GFS2_EA2NAME(ea), er->er_name, er->er_name_len);
690
691 if (GFS2_EAREQ_SIZE_STUFFED(er) <= sdp->sd_jbsize) {
692 ea->ea_num_ptrs = 0;
693 memcpy(GFS2_EA2DATA(ea), er->er_data, er->er_data_len);
694 } else {
Al Virob44b84d2006-10-14 10:46:30 -0400695 __be64 *dataptr = GFS2_EA2DATAPTRS(ea);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000696 const char *data = er->er_data;
697 unsigned int data_len = er->er_data_len;
698 unsigned int copy;
699 unsigned int x;
700
Steven Whitehouse5c676f62006-02-27 17:23:27 -0500701 ea->ea_num_ptrs = DIV_ROUND_UP(er->er_data_len, sdp->sd_jbsize);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000702 for (x = 0; x < ea->ea_num_ptrs; x++) {
703 struct buffer_head *bh;
Steven Whitehousecd915492006-09-04 12:49:07 -0400704 u64 block;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000705 int mh_size = sizeof(struct gfs2_meta_header);
Steven Whitehouseb45e41d2008-02-06 10:11:15 +0000706 unsigned int n = 1;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000707
Bob Peterson6e87ed02011-11-18 10:58:32 -0500708 error = gfs2_alloc_blocks(ip, &block, &n, 0, NULL);
Steven Whitehouse09010972009-05-20 10:48:47 +0100709 if (error)
710 return error;
Steven Whitehouse5731be52008-02-01 13:16:55 +0000711 gfs2_trans_add_unrevoke(sdp, block, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000712 bh = gfs2_meta_new(ip->i_gl, block);
Steven Whitehouse350a9b02012-12-14 12:36:02 +0000713 gfs2_trans_add_meta(ip->i_gl, bh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000714 gfs2_metatype_set(bh, GFS2_METATYPE_ED, GFS2_FORMAT_ED);
715
Steven Whitehouse77658aa2008-02-12 14:17:27 +0000716 gfs2_add_inode_blocks(&ip->i_inode, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000717
Steven Whitehousecca195c2006-09-05 13:15:18 -0400718 copy = data_len > sdp->sd_jbsize ? sdp->sd_jbsize :
719 data_len;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000720 memcpy(bh->b_data + mh_size, data, copy);
721 if (copy < sdp->sd_jbsize)
722 memset(bh->b_data + mh_size + copy, 0,
723 sdp->sd_jbsize - copy);
724
Steven Whitehousecca195c2006-09-05 13:15:18 -0400725 *dataptr++ = cpu_to_be64(bh->b_blocknr);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000726 data += copy;
727 data_len -= copy;
728
729 brelse(bh);
730 }
731
732 gfs2_assert_withdraw(sdp, !data_len);
733 }
734
735 return 0;
736}
737
738typedef int (*ea_skeleton_call_t) (struct gfs2_inode *ip,
Steven Whitehousecca195c2006-09-05 13:15:18 -0400739 struct gfs2_ea_request *er, void *private);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000740
741static int ea_alloc_skeleton(struct gfs2_inode *ip, struct gfs2_ea_request *er,
742 unsigned int blks,
Steven Whitehousecca195c2006-09-05 13:15:18 -0400743 ea_skeleton_call_t skeleton_call, void *private)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000744{
Steven Whitehouse7b9cff42013-10-02 11:13:25 +0100745 struct gfs2_alloc_parms ap = { .target = blks };
David Teiglandb3b94fa2006-01-16 16:50:04 +0000746 int error;
747
Bob Peterson8e2e0042012-07-19 08:12:40 -0400748 error = gfs2_rindex_update(GFS2_SB(&ip->i_inode));
749 if (error)
750 return error;
751
Abhi Dasb8fbf472015-03-18 12:03:41 -0500752 error = gfs2_quota_lock_check(ip, &ap);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000753 if (error)
Bob Peterson5407e242012-05-18 09:28:23 -0400754 return error;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000755
Steven Whitehouse7b9cff42013-10-02 11:13:25 +0100756 error = gfs2_inplace_reserve(ip, &ap);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000757 if (error)
758 goto out_gunlock_q;
759
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400760 error = gfs2_trans_begin(GFS2_SB(&ip->i_inode),
Steven Whitehouse71f890f2012-07-30 14:53:19 +0100761 blks + gfs2_rg_blocks(ip, blks) +
David Teiglandb3b94fa2006-01-16 16:50:04 +0000762 RES_DINODE + RES_STATFS + RES_QUOTA, 0);
763 if (error)
764 goto out_ipres;
765
766 error = skeleton_call(ip, er, private);
767 if (error)
768 goto out_end_trans;
769
Andreas Gruenbacher6862c442017-10-04 16:21:19 +0200770 ip->i_inode.i_ctime = current_time(&ip->i_inode);
771 __mark_inode_dirty(&ip->i_inode, I_DIRTY_SYNC | I_DIRTY_DATASYNC);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000772
Steven Whitehousea91ea692006-09-04 12:04:26 -0400773out_end_trans:
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400774 gfs2_trans_end(GFS2_SB(&ip->i_inode));
Steven Whitehousea91ea692006-09-04 12:04:26 -0400775out_ipres:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000776 gfs2_inplace_release(ip);
Steven Whitehousea91ea692006-09-04 12:04:26 -0400777out_gunlock_q:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000778 gfs2_quota_unlock(ip);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000779 return error;
780}
781
782static int ea_init_i(struct gfs2_inode *ip, struct gfs2_ea_request *er,
783 void *private)
784{
785 struct buffer_head *bh;
786 int error;
787
788 error = ea_alloc_blk(ip, &bh);
789 if (error)
790 return error;
791
Steven Whitehouse3767ac22008-11-03 14:28:42 +0000792 ip->i_eattr = bh->b_blocknr;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000793 error = ea_write(ip, GFS2_EA_BH2FIRST(bh), er);
794
795 brelse(bh);
796
797 return error;
798}
799
800/**
801 * ea_init - initializes a new eattr block
802 * @ip:
803 * @er:
804 *
805 * Returns: errno
806 */
807
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100808static int ea_init(struct gfs2_inode *ip, int type, const char *name,
809 const void *data, size_t size)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000810{
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100811 struct gfs2_ea_request er;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400812 unsigned int jbsize = GFS2_SB(&ip->i_inode)->sd_jbsize;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000813 unsigned int blks = 1;
814
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100815 er.er_type = type;
816 er.er_name = name;
817 er.er_name_len = strlen(name);
818 er.er_data = (void *)data;
819 er.er_data_len = size;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000820
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100821 if (GFS2_EAREQ_SIZE_STUFFED(&er) > jbsize)
822 blks += DIV_ROUND_UP(er.er_data_len, jbsize);
823
824 return ea_alloc_skeleton(ip, &er, blks, ea_init_i, NULL);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000825}
826
827static struct gfs2_ea_header *ea_split_ea(struct gfs2_ea_header *ea)
828{
Steven Whitehousecd915492006-09-04 12:49:07 -0400829 u32 ea_size = GFS2_EA_SIZE(ea);
Steven Whitehouse568f4c92006-02-27 12:00:42 -0500830 struct gfs2_ea_header *new = (struct gfs2_ea_header *)((char *)ea +
831 ea_size);
Steven Whitehousecd915492006-09-04 12:49:07 -0400832 u32 new_size = GFS2_EA_REC_LEN(ea) - ea_size;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000833 int last = ea->ea_flags & GFS2_EAFLAG_LAST;
834
835 ea->ea_rec_len = cpu_to_be32(ea_size);
836 ea->ea_flags ^= last;
837
838 new->ea_rec_len = cpu_to_be32(new_size);
839 new->ea_flags = last;
840
841 return new;
842}
843
844static void ea_set_remove_stuffed(struct gfs2_inode *ip,
845 struct gfs2_ea_location *el)
846{
847 struct gfs2_ea_header *ea = el->el_ea;
848 struct gfs2_ea_header *prev = el->el_prev;
Steven Whitehousecd915492006-09-04 12:49:07 -0400849 u32 len;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000850
Steven Whitehouse350a9b02012-12-14 12:36:02 +0000851 gfs2_trans_add_meta(ip->i_gl, el->el_bh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000852
853 if (!prev || !GFS2_EA_IS_STUFFED(ea)) {
854 ea->ea_type = GFS2_EATYPE_UNUSED;
855 return;
856 } else if (GFS2_EA2NEXT(prev) != ea) {
857 prev = GFS2_EA2NEXT(prev);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400858 gfs2_assert_withdraw(GFS2_SB(&ip->i_inode), GFS2_EA2NEXT(prev) == ea);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000859 }
860
861 len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
862 prev->ea_rec_len = cpu_to_be32(len);
863
864 if (GFS2_EA_IS_LAST(ea))
865 prev->ea_flags |= GFS2_EAFLAG_LAST;
866}
867
868struct ea_set {
869 int ea_split;
870
871 struct gfs2_ea_request *es_er;
872 struct gfs2_ea_location *es_el;
873
874 struct buffer_head *es_bh;
875 struct gfs2_ea_header *es_ea;
876};
877
878static int ea_set_simple_noalloc(struct gfs2_inode *ip, struct buffer_head *bh,
879 struct gfs2_ea_header *ea, struct ea_set *es)
880{
881 struct gfs2_ea_request *er = es->es_er;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000882 int error;
883
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400884 error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + 2 * RES_EATTR, 0);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000885 if (error)
886 return error;
887
Steven Whitehouse350a9b02012-12-14 12:36:02 +0000888 gfs2_trans_add_meta(ip->i_gl, bh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000889
890 if (es->ea_split)
891 ea = ea_split_ea(ea);
892
893 ea_write(ip, ea, er);
894
895 if (es->es_el)
896 ea_set_remove_stuffed(ip, es->es_el);
897
Deepa Dinamani078cd822016-09-14 07:48:04 -0700898 ip->i_inode.i_ctime = current_time(&ip->i_inode);
Andreas Gruenbacher6862c442017-10-04 16:21:19 +0200899 __mark_inode_dirty(&ip->i_inode, I_DIRTY_SYNC | I_DIRTY_DATASYNC);
900
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400901 gfs2_trans_end(GFS2_SB(&ip->i_inode));
David Teiglandb3b94fa2006-01-16 16:50:04 +0000902 return error;
903}
904
905static int ea_set_simple_alloc(struct gfs2_inode *ip,
906 struct gfs2_ea_request *er, void *private)
907{
908 struct ea_set *es = private;
909 struct gfs2_ea_header *ea = es->es_ea;
910 int error;
911
Steven Whitehouse350a9b02012-12-14 12:36:02 +0000912 gfs2_trans_add_meta(ip->i_gl, es->es_bh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000913
914 if (es->ea_split)
915 ea = ea_split_ea(ea);
916
917 error = ea_write(ip, ea, er);
918 if (error)
919 return error;
920
921 if (es->es_el)
922 ea_set_remove_stuffed(ip, es->es_el);
923
924 return 0;
925}
926
927static int ea_set_simple(struct gfs2_inode *ip, struct buffer_head *bh,
928 struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
929 void *private)
930{
931 struct ea_set *es = private;
932 unsigned int size;
933 int stuffed;
934 int error;
935
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100936 stuffed = ea_calc_size(GFS2_SB(&ip->i_inode), es->es_er->er_name_len,
937 es->es_er->er_data_len, &size);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000938
939 if (ea->ea_type == GFS2_EATYPE_UNUSED) {
940 if (GFS2_EA_REC_LEN(ea) < size)
941 return 0;
942 if (!GFS2_EA_IS_STUFFED(ea)) {
943 error = ea_remove_unstuffed(ip, bh, ea, prev, 1);
944 if (error)
945 return error;
946 }
947 es->ea_split = 0;
948 } else if (GFS2_EA_REC_LEN(ea) - GFS2_EA_SIZE(ea) >= size)
949 es->ea_split = 1;
950 else
951 return 0;
952
953 if (stuffed) {
954 error = ea_set_simple_noalloc(ip, bh, ea, es);
955 if (error)
956 return error;
957 } else {
958 unsigned int blks;
959
960 es->es_bh = bh;
961 es->es_ea = ea;
Steven Whitehouse5c676f62006-02-27 17:23:27 -0500962 blks = 2 + DIV_ROUND_UP(es->es_er->er_data_len,
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400963 GFS2_SB(&ip->i_inode)->sd_jbsize);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000964
965 error = ea_alloc_skeleton(ip, es->es_er, blks,
966 ea_set_simple_alloc, es);
967 if (error)
968 return error;
969 }
970
971 return 1;
972}
973
974static int ea_set_block(struct gfs2_inode *ip, struct gfs2_ea_request *er,
975 void *private)
976{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400977 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000978 struct buffer_head *indbh, *newbh;
Al Virob44b84d2006-10-14 10:46:30 -0400979 __be64 *eablk;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000980 int error;
981 int mh_size = sizeof(struct gfs2_meta_header);
982
Steven Whitehouse383f01f2008-11-04 10:05:22 +0000983 if (ip->i_diskflags & GFS2_DIF_EA_INDIRECT) {
Al Virob44b84d2006-10-14 10:46:30 -0400984 __be64 *end;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000985
Andreas Gruenbacherc8d57702015-11-11 15:00:35 -0600986 error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT, 0,
Steven Whitehouse7276b3b2006-09-21 17:05:23 -0400987 &indbh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000988 if (error)
989 return error;
990
991 if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) {
992 error = -EIO;
993 goto out;
994 }
995
Al Virob44b84d2006-10-14 10:46:30 -0400996 eablk = (__be64 *)(indbh->b_data + mh_size);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000997 end = eablk + sdp->sd_inptrs;
998
999 for (; eablk < end; eablk++)
1000 if (!*eablk)
1001 break;
1002
1003 if (eablk == end) {
1004 error = -ENOSPC;
1005 goto out;
1006 }
1007
Steven Whitehouse350a9b02012-12-14 12:36:02 +00001008 gfs2_trans_add_meta(ip->i_gl, indbh);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001009 } else {
Steven Whitehousecd915492006-09-04 12:49:07 -04001010 u64 blk;
Steven Whitehouseb45e41d2008-02-06 10:11:15 +00001011 unsigned int n = 1;
Bob Peterson6e87ed02011-11-18 10:58:32 -05001012 error = gfs2_alloc_blocks(ip, &blk, &n, 0, NULL);
Steven Whitehouse09010972009-05-20 10:48:47 +01001013 if (error)
1014 return error;
Steven Whitehouse5731be52008-02-01 13:16:55 +00001015 gfs2_trans_add_unrevoke(sdp, blk, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001016 indbh = gfs2_meta_new(ip->i_gl, blk);
Steven Whitehouse350a9b02012-12-14 12:36:02 +00001017 gfs2_trans_add_meta(ip->i_gl, indbh);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001018 gfs2_metatype_set(indbh, GFS2_METATYPE_IN, GFS2_FORMAT_IN);
1019 gfs2_buffer_clear_tail(indbh, mh_size);
1020
Al Virob44b84d2006-10-14 10:46:30 -04001021 eablk = (__be64 *)(indbh->b_data + mh_size);
Steven Whitehouse3767ac22008-11-03 14:28:42 +00001022 *eablk = cpu_to_be64(ip->i_eattr);
1023 ip->i_eattr = blk;
Steven Whitehouse383f01f2008-11-04 10:05:22 +00001024 ip->i_diskflags |= GFS2_DIF_EA_INDIRECT;
Steven Whitehouse77658aa2008-02-12 14:17:27 +00001025 gfs2_add_inode_blocks(&ip->i_inode, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001026
1027 eablk++;
1028 }
1029
1030 error = ea_alloc_blk(ip, &newbh);
1031 if (error)
1032 goto out;
1033
Steven Whitehousecd915492006-09-04 12:49:07 -04001034 *eablk = cpu_to_be64((u64)newbh->b_blocknr);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001035 error = ea_write(ip, GFS2_EA_BH2FIRST(newbh), er);
1036 brelse(newbh);
1037 if (error)
1038 goto out;
1039
1040 if (private)
Steven Whitehousecca195c2006-09-05 13:15:18 -04001041 ea_set_remove_stuffed(ip, private);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001042
Steven Whitehousea91ea692006-09-04 12:04:26 -04001043out:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001044 brelse(indbh);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001045 return error;
1046}
1047
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001048static int ea_set_i(struct gfs2_inode *ip, int type, const char *name,
1049 const void *value, size_t size, struct gfs2_ea_location *el)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001050{
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001051 struct gfs2_ea_request er;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001052 struct ea_set es;
1053 unsigned int blks = 2;
1054 int error;
1055
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001056 er.er_type = type;
1057 er.er_name = name;
1058 er.er_data = (void *)value;
1059 er.er_name_len = strlen(name);
1060 er.er_data_len = size;
1061
David Teiglandb3b94fa2006-01-16 16:50:04 +00001062 memset(&es, 0, sizeof(struct ea_set));
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001063 es.es_er = &er;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001064 es.es_el = el;
1065
1066 error = ea_foreach(ip, ea_set_simple, &es);
1067 if (error > 0)
1068 return 0;
1069 if (error)
1070 return error;
1071
Steven Whitehouse383f01f2008-11-04 10:05:22 +00001072 if (!(ip->i_diskflags & GFS2_DIF_EA_INDIRECT))
David Teiglandb3b94fa2006-01-16 16:50:04 +00001073 blks++;
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001074 if (GFS2_EAREQ_SIZE_STUFFED(&er) > GFS2_SB(&ip->i_inode)->sd_jbsize)
1075 blks += DIV_ROUND_UP(er.er_data_len, GFS2_SB(&ip->i_inode)->sd_jbsize);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001076
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001077 return ea_alloc_skeleton(ip, &er, blks, ea_set_block, el);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001078}
1079
1080static int ea_set_remove_unstuffed(struct gfs2_inode *ip,
1081 struct gfs2_ea_location *el)
1082{
1083 if (el->el_prev && GFS2_EA2NEXT(el->el_prev) != el->el_ea) {
1084 el->el_prev = GFS2_EA2NEXT(el->el_prev);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001085 gfs2_assert_withdraw(GFS2_SB(&ip->i_inode),
David Teiglandb3b94fa2006-01-16 16:50:04 +00001086 GFS2_EA2NEXT(el->el_prev) == el->el_ea);
1087 }
1088
Steven Whitehouse86d00632009-09-14 09:50:57 +01001089 return ea_remove_unstuffed(ip, el->el_bh, el->el_ea, el->el_prev, 0);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001090}
1091
David Teiglandb3b94fa2006-01-16 16:50:04 +00001092static int ea_remove_stuffed(struct gfs2_inode *ip, struct gfs2_ea_location *el)
1093{
1094 struct gfs2_ea_header *ea = el->el_ea;
1095 struct gfs2_ea_header *prev = el->el_prev;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001096 int error;
1097
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001098 error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + RES_EATTR, 0);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001099 if (error)
1100 return error;
1101
Steven Whitehouse350a9b02012-12-14 12:36:02 +00001102 gfs2_trans_add_meta(ip->i_gl, el->el_bh);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001103
1104 if (prev) {
Steven Whitehousecd915492006-09-04 12:49:07 -04001105 u32 len;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001106
1107 len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
1108 prev->ea_rec_len = cpu_to_be32(len);
1109
1110 if (GFS2_EA_IS_LAST(ea))
1111 prev->ea_flags |= GFS2_EAFLAG_LAST;
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001112 } else {
David Teiglandb3b94fa2006-01-16 16:50:04 +00001113 ea->ea_type = GFS2_EATYPE_UNUSED;
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001114 }
David Teiglandb3b94fa2006-01-16 16:50:04 +00001115
Andreas Gruenbacher6862c442017-10-04 16:21:19 +02001116 ip->i_inode.i_ctime = current_time(&ip->i_inode);
1117 __mark_inode_dirty(&ip->i_inode, I_DIRTY_SYNC | I_DIRTY_DATASYNC);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001118
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001119 gfs2_trans_end(GFS2_SB(&ip->i_inode));
David Teiglandb3b94fa2006-01-16 16:50:04 +00001120
1121 return error;
1122}
1123
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001124/**
1125 * gfs2_xattr_remove - Remove a GFS2 extended attribute
Christoph Hellwig431547b2009-11-13 09:52:56 +00001126 * @ip: The inode
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001127 * @type: The type of the extended attribute
1128 * @name: The name of the extended attribute
1129 *
1130 * This is not called directly by the VFS since we use the (common)
1131 * scheme of making a "set with NULL data" mean a remove request. Note
1132 * that this is different from a set with zero length data.
1133 *
1134 * Returns: 0, or errno on failure
1135 */
1136
Christoph Hellwig431547b2009-11-13 09:52:56 +00001137static int gfs2_xattr_remove(struct gfs2_inode *ip, int type, const char *name)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001138{
1139 struct gfs2_ea_location el;
1140 int error;
1141
Steven Whitehouse3767ac22008-11-03 14:28:42 +00001142 if (!ip->i_eattr)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001143 return -ENODATA;
1144
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001145 error = gfs2_ea_find(ip, type, name, &el);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001146 if (error)
1147 return error;
1148 if (!el.el_ea)
1149 return -ENODATA;
1150
1151 if (GFS2_EA_IS_STUFFED(el.el_ea))
1152 error = ea_remove_stuffed(ip, &el);
1153 else
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001154 error = ea_remove_unstuffed(ip, el.el_bh, el.el_ea, el.el_prev, 0);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001155
1156 brelse(el.el_bh);
1157
1158 return error;
1159}
1160
1161/**
Christoph Hellwig431547b2009-11-13 09:52:56 +00001162 * __gfs2_xattr_set - Set (or remove) a GFS2 extended attribute
1163 * @ip: The inode
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001164 * @name: The name of the extended attribute
1165 * @value: The value of the extended attribute (NULL for remove)
1166 * @size: The size of the @value argument
1167 * @flags: Create or Replace
Christoph Hellwig431547b2009-11-13 09:52:56 +00001168 * @type: The type of the extended attribute
David Teiglandb3b94fa2006-01-16 16:50:04 +00001169 *
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001170 * See gfs2_xattr_remove() for details of the removal of xattrs.
1171 *
1172 * Returns: 0 or errno on failure
David Teiglandb3b94fa2006-01-16 16:50:04 +00001173 */
1174
Christoph Hellwig431547b2009-11-13 09:52:56 +00001175int __gfs2_xattr_set(struct inode *inode, const char *name,
1176 const void *value, size_t size, int flags, int type)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001177{
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001178 struct gfs2_inode *ip = GFS2_I(inode);
Christoph Hellwig431547b2009-11-13 09:52:56 +00001179 struct gfs2_sbd *sdp = GFS2_SB(inode);
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001180 struct gfs2_ea_location el;
1181 unsigned int namel = strlen(name);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001182 int error;
1183
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001184 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
1185 return -EPERM;
1186 if (namel > GFS2_EA_MAX_NAME_LEN)
1187 return -ERANGE;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001188
Ernesto A. Fernández54aae142017-08-30 07:26:30 -05001189 if (value == NULL) {
1190 error = gfs2_xattr_remove(ip, type, name);
1191 if (error == -ENODATA && !(flags & XATTR_REPLACE))
1192 error = 0;
1193 return error;
1194 }
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001195
1196 if (ea_check_size(sdp, namel, size))
1197 return -ERANGE;
1198
1199 if (!ip->i_eattr) {
1200 if (flags & XATTR_REPLACE)
1201 return -ENODATA;
1202 return ea_init(ip, type, name, value, size);
1203 }
1204
1205 error = gfs2_ea_find(ip, type, name, &el);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001206 if (error)
1207 return error;
1208
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001209 if (el.el_ea) {
1210 if (ip->i_diskflags & GFS2_DIF_APPENDONLY) {
1211 brelse(el.el_bh);
1212 return -EPERM;
1213 }
David Teiglandb3b94fa2006-01-16 16:50:04 +00001214
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001215 error = -EEXIST;
1216 if (!(flags & XATTR_CREATE)) {
1217 int unstuffed = !GFS2_EA_IS_STUFFED(el.el_ea);
1218 error = ea_set_i(ip, type, name, value, size, &el);
1219 if (!error && unstuffed)
1220 ea_set_remove_unstuffed(ip, &el);
1221 }
1222
1223 brelse(el.el_bh);
1224 return error;
1225 }
1226
1227 error = -ENODATA;
1228 if (!(flags & XATTR_REPLACE))
1229 error = ea_set_i(ip, type, name, value, size, NULL);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001230
1231 return error;
1232}
1233
Andreas Gruenbacherd9a82a02015-10-04 19:18:51 +02001234static int gfs2_xattr_set(const struct xattr_handler *handler,
Al Viro59301222016-05-27 10:19:30 -04001235 struct dentry *unused, struct inode *inode,
1236 const char *name, const void *value,
1237 size_t size, int flags)
Christoph Hellwig431547b2009-11-13 09:52:56 +00001238{
Al Viro1a39ba92016-05-13 03:59:17 +02001239 struct gfs2_inode *ip = GFS2_I(inode);
1240 struct gfs2_holder gh;
1241 int ret;
1242
1243 ret = gfs2_rsqa_alloc(ip);
1244 if (ret)
1245 return ret;
1246
Andreas Gruenbacherd0920a92017-10-13 00:39:38 +02001247 /* May be called from gfs_setattr with the glock locked. */
1248
1249 if (!gfs2_glock_is_locked_by_me(ip->i_gl)) {
1250 ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
1251 if (ret)
1252 return ret;
1253 } else {
1254 if (WARN_ON_ONCE(ip->i_gl->gl_state != LM_ST_EXCLUSIVE))
1255 return -EIO;
1256 gfs2_holder_mark_uninitialized(&gh);
1257 }
Al Viro1a39ba92016-05-13 03:59:17 +02001258 ret = __gfs2_xattr_set(inode, name, value, size, flags, handler->flags);
Andreas Gruenbacherd0920a92017-10-13 00:39:38 +02001259 if (gfs2_holder_initialized(&gh))
1260 gfs2_glock_dq_uninit(&gh);
Al Viro1a39ba92016-05-13 03:59:17 +02001261 return ret;
Christoph Hellwig431547b2009-11-13 09:52:56 +00001262}
1263
David Teiglandb3b94fa2006-01-16 16:50:04 +00001264static int ea_dealloc_indirect(struct gfs2_inode *ip)
1265{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001266 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001267 struct gfs2_rgrp_list rlist;
1268 struct buffer_head *indbh, *dibh;
Al Virob44b84d2006-10-14 10:46:30 -04001269 __be64 *eablk, *end;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001270 unsigned int rg_blocks = 0;
Steven Whitehousecd915492006-09-04 12:49:07 -04001271 u64 bstart = 0;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001272 unsigned int blen = 0;
1273 unsigned int blks = 0;
1274 unsigned int x;
1275 int error;
1276
Bob Peterson5e2f7d62012-04-04 22:11:16 -04001277 error = gfs2_rindex_update(sdp);
1278 if (error)
1279 return error;
1280
David Teiglandb3b94fa2006-01-16 16:50:04 +00001281 memset(&rlist, 0, sizeof(struct gfs2_rgrp_list));
1282
Andreas Gruenbacherc8d57702015-11-11 15:00:35 -06001283 error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT, 0, &indbh);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001284 if (error)
1285 return error;
1286
1287 if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) {
1288 error = -EIO;
1289 goto out;
1290 }
1291
Al Virob44b84d2006-10-14 10:46:30 -04001292 eablk = (__be64 *)(indbh->b_data + sizeof(struct gfs2_meta_header));
David Teiglandb3b94fa2006-01-16 16:50:04 +00001293 end = eablk + sdp->sd_inptrs;
1294
1295 for (; eablk < end; eablk++) {
Steven Whitehousecd915492006-09-04 12:49:07 -04001296 u64 bn;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001297
1298 if (!*eablk)
1299 break;
1300 bn = be64_to_cpu(*eablk);
1301
1302 if (bstart + blen == bn)
1303 blen++;
1304 else {
1305 if (bstart)
Steven Whitehouse70b0c362011-09-02 16:08:09 +01001306 gfs2_rlist_add(ip, &rlist, bstart);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001307 bstart = bn;
1308 blen = 1;
1309 }
1310 blks++;
1311 }
1312 if (bstart)
Steven Whitehouse70b0c362011-09-02 16:08:09 +01001313 gfs2_rlist_add(ip, &rlist, bstart);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001314 else
1315 goto out;
1316
Bob Petersonfe6c9912008-01-28 11:13:02 -06001317 gfs2_rlist_alloc(&rlist, LM_ST_EXCLUSIVE);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001318
1319 for (x = 0; x < rlist.rl_rgrps; x++) {
Andreas Gruenbacher6f6597ba2017-06-30 07:55:08 -05001320 struct gfs2_rgrpd *rgd = gfs2_glock2rgrp(rlist.rl_ghs[x].gh_gl);
1321
Steven Whitehousebb8d8a62007-06-01 14:11:58 +01001322 rg_blocks += rgd->rd_length;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001323 }
1324
1325 error = gfs2_glock_nq_m(rlist.rl_rgrps, rlist.rl_ghs);
1326 if (error)
1327 goto out_rlist_free;
1328
Steven Whitehousecca195c2006-09-05 13:15:18 -04001329 error = gfs2_trans_begin(sdp, rg_blocks + RES_DINODE + RES_INDIRECT +
1330 RES_STATFS + RES_QUOTA, blks);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001331 if (error)
1332 goto out_gunlock;
1333
Steven Whitehouse350a9b02012-12-14 12:36:02 +00001334 gfs2_trans_add_meta(ip->i_gl, indbh);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001335
Al Virob44b84d2006-10-14 10:46:30 -04001336 eablk = (__be64 *)(indbh->b_data + sizeof(struct gfs2_meta_header));
David Teiglandb3b94fa2006-01-16 16:50:04 +00001337 bstart = 0;
1338 blen = 0;
1339
1340 for (; eablk < end; eablk++) {
Steven Whitehousecd915492006-09-04 12:49:07 -04001341 u64 bn;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001342
1343 if (!*eablk)
1344 break;
1345 bn = be64_to_cpu(*eablk);
1346
1347 if (bstart + blen == bn)
1348 blen++;
1349 else {
1350 if (bstart)
1351 gfs2_free_meta(ip, bstart, blen);
1352 bstart = bn;
1353 blen = 1;
1354 }
1355
1356 *eablk = 0;
Steven Whitehouse77658aa2008-02-12 14:17:27 +00001357 gfs2_add_inode_blocks(&ip->i_inode, -1);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001358 }
1359 if (bstart)
1360 gfs2_free_meta(ip, bstart, blen);
1361
Steven Whitehouse383f01f2008-11-04 10:05:22 +00001362 ip->i_diskflags &= ~GFS2_DIF_EA_INDIRECT;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001363
1364 error = gfs2_meta_inode_buffer(ip, &dibh);
1365 if (!error) {
Steven Whitehouse350a9b02012-12-14 12:36:02 +00001366 gfs2_trans_add_meta(ip->i_gl, dibh);
Steven Whitehouse539e5d62006-10-31 15:07:05 -05001367 gfs2_dinode_out(ip, dibh->b_data);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001368 brelse(dibh);
1369 }
1370
1371 gfs2_trans_end(sdp);
1372
Steven Whitehousea91ea692006-09-04 12:04:26 -04001373out_gunlock:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001374 gfs2_glock_dq_m(rlist.rl_rgrps, rlist.rl_ghs);
Steven Whitehousea91ea692006-09-04 12:04:26 -04001375out_rlist_free:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001376 gfs2_rlist_free(&rlist);
Steven Whitehousea91ea692006-09-04 12:04:26 -04001377out:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001378 brelse(indbh);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001379 return error;
1380}
1381
1382static int ea_dealloc_block(struct gfs2_inode *ip)
1383{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001384 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001385 struct gfs2_rgrpd *rgd;
1386 struct buffer_head *dibh;
Bob Peterson564e12b2011-11-21 13:36:17 -05001387 struct gfs2_holder gh;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001388 int error;
1389
Bob Peterson5e2f7d62012-04-04 22:11:16 -04001390 error = gfs2_rindex_update(sdp);
1391 if (error)
1392 return error;
1393
Steven Whitehouse66fc0612012-02-08 12:58:32 +00001394 rgd = gfs2_blk2rgrpd(sdp, ip->i_eattr, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001395 if (!rgd) {
1396 gfs2_consist_inode(ip);
1397 return -EIO;
1398 }
1399
Bob Peterson564e12b2011-11-21 13:36:17 -05001400 error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &gh);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001401 if (error)
1402 return error;
1403
Steven Whitehousecca195c2006-09-05 13:15:18 -04001404 error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_DINODE + RES_STATFS +
1405 RES_QUOTA, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001406 if (error)
1407 goto out_gunlock;
1408
Steven Whitehouse3767ac22008-11-03 14:28:42 +00001409 gfs2_free_meta(ip, ip->i_eattr, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001410
Steven Whitehouse3767ac22008-11-03 14:28:42 +00001411 ip->i_eattr = 0;
Steven Whitehouse77658aa2008-02-12 14:17:27 +00001412 gfs2_add_inode_blocks(&ip->i_inode, -1);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001413
1414 error = gfs2_meta_inode_buffer(ip, &dibh);
1415 if (!error) {
Steven Whitehouse350a9b02012-12-14 12:36:02 +00001416 gfs2_trans_add_meta(ip->i_gl, dibh);
Steven Whitehouse539e5d62006-10-31 15:07:05 -05001417 gfs2_dinode_out(ip, dibh->b_data);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001418 brelse(dibh);
1419 }
1420
1421 gfs2_trans_end(sdp);
1422
Steven Whitehousea91ea692006-09-04 12:04:26 -04001423out_gunlock:
Bob Peterson564e12b2011-11-21 13:36:17 -05001424 gfs2_glock_dq_uninit(&gh);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001425 return error;
1426}
1427
1428/**
1429 * gfs2_ea_dealloc - deallocate the extended attribute fork
1430 * @ip: the inode
1431 *
1432 * Returns: errno
1433 */
1434
1435int gfs2_ea_dealloc(struct gfs2_inode *ip)
1436{
David Teiglandb3b94fa2006-01-16 16:50:04 +00001437 int error;
1438
Bob Peterson8e2e0042012-07-19 08:12:40 -04001439 error = gfs2_rindex_update(GFS2_SB(&ip->i_inode));
1440 if (error)
1441 return error;
1442
Eric W. Biedermanf4108a62013-01-31 17:49:26 -08001443 error = gfs2_quota_hold(ip, NO_UID_QUOTA_CHANGE, NO_GID_QUOTA_CHANGE);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001444 if (error)
Bob Peterson5407e242012-05-18 09:28:23 -04001445 return error;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001446
David Teiglandb3b94fa2006-01-16 16:50:04 +00001447 error = ea_foreach(ip, ea_dealloc_unstuffed, NULL);
1448 if (error)
Steven Whitehouse8339ee52011-08-31 16:38:29 +01001449 goto out_quota;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001450
Steven Whitehouse383f01f2008-11-04 10:05:22 +00001451 if (ip->i_diskflags & GFS2_DIF_EA_INDIRECT) {
David Teiglandb3b94fa2006-01-16 16:50:04 +00001452 error = ea_dealloc_indirect(ip);
1453 if (error)
Steven Whitehouse8339ee52011-08-31 16:38:29 +01001454 goto out_quota;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001455 }
1456
1457 error = ea_dealloc_block(ip);
1458
Steven Whitehousea91ea692006-09-04 12:04:26 -04001459out_quota:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001460 gfs2_quota_unhold(ip);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001461 return error;
1462}
1463
Stephen Hemmingerb7bb0a12010-05-13 17:53:23 -07001464static const struct xattr_handler gfs2_xattr_user_handler = {
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001465 .prefix = XATTR_USER_PREFIX,
Christoph Hellwig431547b2009-11-13 09:52:56 +00001466 .flags = GFS2_EATYPE_USR,
1467 .get = gfs2_xattr_get,
1468 .set = gfs2_xattr_set,
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001469};
1470
Stephen Hemmingerb7bb0a12010-05-13 17:53:23 -07001471static const struct xattr_handler gfs2_xattr_security_handler = {
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001472 .prefix = XATTR_SECURITY_PREFIX,
Christoph Hellwig431547b2009-11-13 09:52:56 +00001473 .flags = GFS2_EATYPE_SECURITY,
1474 .get = gfs2_xattr_get,
1475 .set = gfs2_xattr_set,
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001476};
1477
Stephen Hemmingerb7bb0a12010-05-13 17:53:23 -07001478const struct xattr_handler *gfs2_xattr_handlers[] = {
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001479 &gfs2_xattr_user_handler,
1480 &gfs2_xattr_security_handler,
Christoph Hellwige01580b2013-12-20 05:16:52 -08001481 &posix_acl_access_xattr_handler,
1482 &posix_acl_default_xattr_handler,
Steven Whitehouse40b78a32009-08-26 18:41:32 +01001483 NULL,
1484};
1485