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Commit | Line | Data |
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b3b94faa DT |
1 | /* |
2 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. | |
3a8a9a10 | 3 | * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. |
b3b94faa DT |
4 | * |
5 | * This copyrighted material is made available to anyone wishing to use, | |
6 | * modify, copy, or redistribute it subject to the terms and conditions | |
e9fc2aa0 | 7 | * of the GNU General Public License version 2. |
b3b94faa DT |
8 | */ |
9 | ||
b3b94faa DT |
10 | #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> | |
5c676f6d | 15 | #include <linux/gfs2_ondisk.h> |
e01580bf | 16 | #include <linux/posix_acl_xattr.h> |
7c0f6ba6 | 17 | #include <linux/uaccess.h> |
b3b94faa DT |
18 | |
19 | #include "gfs2.h" | |
5c676f6d | 20 | #include "incore.h" |
b3b94faa | 21 | #include "acl.h" |
307cf6e6 | 22 | #include "xattr.h" |
b3b94faa DT |
23 | #include "glock.h" |
24 | #include "inode.h" | |
25 | #include "meta_io.h" | |
26 | #include "quota.h" | |
27 | #include "rgrp.h" | |
27c3b415 | 28 | #include "super.h" |
b3b94faa | 29 | #include "trans.h" |
5c676f6d | 30 | #include "util.h" |
b3b94faa DT |
31 | |
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 | ||
40b78a32 | 42 | static int ea_calc_size(struct gfs2_sbd *sdp, unsigned int nsize, size_t dsize, |
b3b94faa DT |
43 | unsigned int *size) |
44 | { | |
40b78a32 SW |
45 | 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) | |
b3b94faa DT |
51 | return 1; |
52 | ||
40b78a32 SW |
53 | /* Unstuffed */ |
54 | *size = ALIGN(sizeof(struct gfs2_ea_header) + nsize + | |
55 | (sizeof(__be64) * DIV_ROUND_UP(dsize, jbsize)), 8); | |
b3b94faa DT |
56 | |
57 | return 0; | |
58 | } | |
59 | ||
40b78a32 | 60 | static int ea_check_size(struct gfs2_sbd *sdp, unsigned int nsize, size_t dsize) |
b3b94faa DT |
61 | { |
62 | unsigned int size; | |
63 | ||
40b78a32 | 64 | if (dsize > GFS2_EA_MAX_DATA_LEN) |
b3b94faa DT |
65 | return -ERANGE; |
66 | ||
40b78a32 | 67 | ea_calc_size(sdp, nsize, dsize, &size); |
b3b94faa DT |
68 | |
69 | /* This can only happen with 512 byte blocks */ | |
70 | if (size > sdp->sd_jbsize) | |
71 | return -ERANGE; | |
72 | ||
73 | return 0; | |
74 | } | |
75 | ||
cca195c5 | 76 | typedef int (*ea_call_t) (struct gfs2_inode *ip, struct buffer_head *bh, |
b3b94faa | 77 | struct gfs2_ea_header *ea, |
cca195c5 | 78 | struct gfs2_ea_header *prev, void *private); |
b3b94faa DT |
79 | |
80 | static 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 | ||
feaa7bba | 86 | if (gfs2_metatype_check(GFS2_SB(&ip->i_inode), bh, GFS2_METATYPE_EA)) |
b3b94faa DT |
87 | 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; | |
cca195c5 SW |
92 | if (!(bh->b_data <= (char *)ea && (char *)GFS2_EA2NEXT(ea) <= |
93 | bh->b_data + bh->b_size)) | |
b3b94faa DT |
94 | 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 | ||
a91ea69f | 112 | fail: |
b3b94faa DT |
113 | gfs2_consist_inode(ip); |
114 | return -EIO; | |
115 | } | |
116 | ||
117 | static int ea_foreach(struct gfs2_inode *ip, ea_call_t ea_call, void *data) | |
118 | { | |
119 | struct buffer_head *bh, *eabh; | |
b44b84d7 | 120 | __be64 *eablk, *end; |
b3b94faa DT |
121 | int error; |
122 | ||
c8d57703 | 123 | error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT, 0, &bh); |
b3b94faa DT |
124 | if (error) |
125 | return error; | |
126 | ||
383f01fb | 127 | if (!(ip->i_diskflags & GFS2_DIF_EA_INDIRECT)) { |
b3b94faa DT |
128 | error = ea_foreach_i(ip, bh, ea_call, data); |
129 | goto out; | |
130 | } | |
131 | ||
feaa7bba | 132 | if (gfs2_metatype_check(GFS2_SB(&ip->i_inode), bh, GFS2_METATYPE_IN)) { |
b3b94faa DT |
133 | error = -EIO; |
134 | goto out; | |
135 | } | |
136 | ||
b44b84d7 | 137 | eablk = (__be64 *)(bh->b_data + sizeof(struct gfs2_meta_header)); |
feaa7bba | 138 | end = eablk + GFS2_SB(&ip->i_inode)->sd_inptrs; |
b3b94faa DT |
139 | |
140 | for (; eablk < end; eablk++) { | |
cd915493 | 141 | u64 bn; |
b3b94faa DT |
142 | |
143 | if (!*eablk) | |
144 | break; | |
145 | bn = be64_to_cpu(*eablk); | |
146 | ||
c8d57703 | 147 | error = gfs2_meta_read(ip->i_gl, bn, DIO_WAIT, 0, &eabh); |
b3b94faa DT |
148 | if (error) |
149 | break; | |
150 | error = ea_foreach_i(ip, eabh, ea_call, data); | |
151 | brelse(eabh); | |
152 | if (error) | |
153 | break; | |
154 | } | |
a91ea69f | 155 | out: |
b3b94faa | 156 | brelse(bh); |
b3b94faa DT |
157 | return error; |
158 | } | |
159 | ||
160 | struct ea_find { | |
40b78a32 SW |
161 | int type; |
162 | const char *name; | |
163 | size_t namel; | |
b3b94faa DT |
164 | struct gfs2_ea_location *ef_el; |
165 | }; | |
166 | ||
167 | static 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; | |
b3b94faa DT |
172 | |
173 | if (ea->ea_type == GFS2_EATYPE_UNUSED) | |
174 | return 0; | |
175 | ||
40b78a32 SW |
176 | 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)) { | |
b3b94faa DT |
179 | 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 | ||
b3b94faa DT |
188 | return 0; |
189 | } | |
190 | ||
479c427d SW |
191 | static int gfs2_ea_find(struct gfs2_inode *ip, int type, const char *name, |
192 | struct gfs2_ea_location *el) | |
b3b94faa DT |
193 | { |
194 | struct ea_find ef; | |
195 | int error; | |
196 | ||
40b78a32 SW |
197 | ef.type = type; |
198 | ef.name = name; | |
199 | ef.namel = strlen(name); | |
b3b94faa DT |
200 | 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 | ||
226 | static 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; | |
feaa7bba | 231 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa DT |
232 | struct gfs2_rgrpd *rgd; |
233 | struct gfs2_holder rg_gh; | |
234 | struct buffer_head *dibh; | |
b44b84d7 AV |
235 | __be64 *dataptrs; |
236 | u64 bn = 0; | |
cd915493 | 237 | u64 bstart = 0; |
b3b94faa DT |
238 | unsigned int blen = 0; |
239 | unsigned int blks = 0; | |
240 | unsigned int x; | |
241 | int error; | |
242 | ||
5e2f7d61 BP |
243 | error = gfs2_rindex_update(sdp); |
244 | if (error) | |
245 | return error; | |
246 | ||
b3b94faa DT |
247 | if (GFS2_EA_IS_STUFFED(ea)) |
248 | return 0; | |
249 | ||
250 | dataptrs = GFS2_EA2DATAPTRS(ea); | |
cca195c5 | 251 | for (x = 0; x < ea->ea_num_ptrs; x++, dataptrs++) { |
b3b94faa DT |
252 | if (*dataptrs) { |
253 | blks++; | |
254 | bn = be64_to_cpu(*dataptrs); | |
255 | } | |
cca195c5 | 256 | } |
b3b94faa DT |
257 | if (!blks) |
258 | return 0; | |
259 | ||
66fc061b | 260 | rgd = gfs2_blk2rgrpd(sdp, bn, 1); |
b3b94faa DT |
261 | if (!rgd) { |
262 | gfs2_consist_inode(ip); | |
263 | return -EIO; | |
264 | } | |
265 | ||
266 | error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &rg_gh); | |
267 | if (error) | |
268 | return error; | |
269 | ||
bb8d8a6f | 270 | error = gfs2_trans_begin(sdp, rgd->rd_length + RES_DINODE + |
cca195c5 | 271 | RES_EATTR + RES_STATFS + RES_QUOTA, blks); |
b3b94faa DT |
272 | if (error) |
273 | goto out_gunlock; | |
274 | ||
350a9b0a | 275 | gfs2_trans_add_meta(ip->i_gl, bh); |
b3b94faa DT |
276 | |
277 | dataptrs = GFS2_EA2DATAPTRS(ea); | |
278 | for (x = 0; x < ea->ea_num_ptrs; x++, dataptrs++) { | |
279 | if (!*dataptrs) | |
280 | break; | |
281 | bn = be64_to_cpu(*dataptrs); | |
282 | ||
283 | if (bstart + blen == bn) | |
284 | blen++; | |
285 | else { | |
286 | if (bstart) | |
287 | gfs2_free_meta(ip, bstart, blen); | |
288 | bstart = bn; | |
289 | blen = 1; | |
290 | } | |
291 | ||
292 | *dataptrs = 0; | |
77658aad | 293 | gfs2_add_inode_blocks(&ip->i_inode, -1); |
b3b94faa DT |
294 | } |
295 | if (bstart) | |
296 | gfs2_free_meta(ip, bstart, blen); | |
297 | ||
298 | if (prev && !leave) { | |
cd915493 | 299 | u32 len; |
b3b94faa DT |
300 | |
301 | len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea); | |
302 | prev->ea_rec_len = cpu_to_be32(len); | |
303 | ||
304 | if (GFS2_EA_IS_LAST(ea)) | |
305 | prev->ea_flags |= GFS2_EAFLAG_LAST; | |
306 | } else { | |
307 | ea->ea_type = GFS2_EATYPE_UNUSED; | |
308 | ea->ea_num_ptrs = 0; | |
309 | } | |
310 | ||
311 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
312 | if (!error) { | |
078cd827 | 313 | ip->i_inode.i_ctime = current_time(&ip->i_inode); |
350a9b0a | 314 | gfs2_trans_add_meta(ip->i_gl, dibh); |
539e5d6b | 315 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa DT |
316 | brelse(dibh); |
317 | } | |
318 | ||
319 | gfs2_trans_end(sdp); | |
320 | ||
a91ea69f | 321 | out_gunlock: |
b3b94faa | 322 | gfs2_glock_dq_uninit(&rg_gh); |
b3b94faa DT |
323 | return error; |
324 | } | |
325 | ||
326 | static int ea_remove_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh, | |
327 | struct gfs2_ea_header *ea, | |
328 | struct gfs2_ea_header *prev, int leave) | |
329 | { | |
b3b94faa DT |
330 | int error; |
331 | ||
8e2e0047 BP |
332 | error = gfs2_rindex_update(GFS2_SB(&ip->i_inode)); |
333 | if (error) | |
334 | return error; | |
335 | ||
f4108a60 | 336 | error = gfs2_quota_hold(ip, NO_UID_QUOTA_CHANGE, NO_GID_QUOTA_CHANGE); |
b3b94faa DT |
337 | if (error) |
338 | goto out_alloc; | |
339 | ||
cca195c5 | 340 | error = ea_dealloc_unstuffed(ip, bh, ea, prev, (leave) ? &error : NULL); |
b3b94faa | 341 | |
b3b94faa | 342 | gfs2_quota_unhold(ip); |
a91ea69f | 343 | out_alloc: |
b3b94faa DT |
344 | return error; |
345 | } | |
346 | ||
b3b94faa DT |
347 | struct ea_list { |
348 | struct gfs2_ea_request *ei_er; | |
349 | unsigned int ei_size; | |
350 | }; | |
351 | ||
40b78a32 SW |
352 | static inline unsigned int gfs2_ea_strlen(struct gfs2_ea_header *ea) |
353 | { | |
354 | switch (ea->ea_type) { | |
355 | case GFS2_EATYPE_USR: | |
356 | return 5 + ea->ea_name_len + 1; | |
357 | case GFS2_EATYPE_SYS: | |
358 | return 7 + ea->ea_name_len + 1; | |
359 | case GFS2_EATYPE_SECURITY: | |
360 | return 9 + ea->ea_name_len + 1; | |
361 | default: | |
362 | return 0; | |
363 | } | |
364 | } | |
365 | ||
b3b94faa DT |
366 | static int ea_list_i(struct gfs2_inode *ip, struct buffer_head *bh, |
367 | struct gfs2_ea_header *ea, struct gfs2_ea_header *prev, | |
368 | void *private) | |
369 | { | |
370 | struct ea_list *ei = private; | |
371 | struct gfs2_ea_request *er = ei->ei_er; | |
639b6d79 | 372 | unsigned int ea_size = gfs2_ea_strlen(ea); |
b3b94faa DT |
373 | |
374 | if (ea->ea_type == GFS2_EATYPE_UNUSED) | |
375 | return 0; | |
376 | ||
377 | if (er->er_data_len) { | |
01eb7c07 SW |
378 | char *prefix = NULL; |
379 | unsigned int l = 0; | |
b3b94faa DT |
380 | char c = 0; |
381 | ||
382 | if (ei->ei_size + ea_size > er->er_data_len) | |
383 | return -ERANGE; | |
384 | ||
639b6d79 RH |
385 | switch (ea->ea_type) { |
386 | case GFS2_EATYPE_USR: | |
b3b94faa DT |
387 | prefix = "user."; |
388 | l = 5; | |
639b6d79 RH |
389 | break; |
390 | case GFS2_EATYPE_SYS: | |
b3b94faa DT |
391 | prefix = "system."; |
392 | l = 7; | |
639b6d79 RH |
393 | break; |
394 | case GFS2_EATYPE_SECURITY: | |
395 | prefix = "security."; | |
396 | l = 9; | |
397 | break; | |
b3b94faa DT |
398 | } |
399 | ||
01eb7c07 SW |
400 | BUG_ON(l == 0); |
401 | ||
90cdd208 SW |
402 | memcpy(er->er_data + ei->ei_size, prefix, l); |
403 | memcpy(er->er_data + ei->ei_size + l, GFS2_EA2NAME(ea), | |
b3b94faa | 404 | ea->ea_name_len); |
90cdd208 | 405 | memcpy(er->er_data + ei->ei_size + ea_size - 1, &c, 1); |
b3b94faa DT |
406 | } |
407 | ||
408 | ei->ei_size += ea_size; | |
409 | ||
410 | return 0; | |
411 | } | |
412 | ||
413 | /** | |
40b78a32 SW |
414 | * gfs2_listxattr - List gfs2 extended attributes |
415 | * @dentry: The dentry whose inode we are interested in | |
416 | * @buffer: The buffer to write the results | |
417 | * @size: The size of the buffer | |
b3b94faa DT |
418 | * |
419 | * Returns: actual size of data on success, -errno on error | |
420 | */ | |
421 | ||
40b78a32 | 422 | ssize_t gfs2_listxattr(struct dentry *dentry, char *buffer, size_t size) |
b3b94faa | 423 | { |
2b0143b5 | 424 | struct gfs2_inode *ip = GFS2_I(d_inode(dentry)); |
40b78a32 | 425 | struct gfs2_ea_request er; |
b3b94faa DT |
426 | struct gfs2_holder i_gh; |
427 | int error; | |
428 | ||
40b78a32 SW |
429 | memset(&er, 0, sizeof(struct gfs2_ea_request)); |
430 | if (size) { | |
431 | er.er_data = buffer; | |
432 | er.er_data_len = size; | |
b3b94faa DT |
433 | } |
434 | ||
cca195c5 | 435 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh); |
b3b94faa DT |
436 | if (error) |
437 | return error; | |
438 | ||
3767ac21 | 439 | if (ip->i_eattr) { |
40b78a32 | 440 | struct ea_list ei = { .ei_er = &er, .ei_size = 0 }; |
b3b94faa DT |
441 | |
442 | error = ea_foreach(ip, ea_list_i, &ei); | |
443 | if (!error) | |
444 | error = ei.ei_size; | |
445 | } | |
446 | ||
447 | gfs2_glock_dq_uninit(&i_gh); | |
448 | ||
449 | return error; | |
450 | } | |
451 | ||
452 | /** | |
1f981697 SW |
453 | * ea_iter_unstuffed - copies the unstuffed xattr data to/from the |
454 | * request buffer | |
cca195c5 SW |
455 | * @ip: The GFS2 inode |
456 | * @ea: The extended attribute header structure | |
1f981697 SW |
457 | * @din: The data to be copied in |
458 | * @dout: The data to be copied out (one of din,dout will be NULL) | |
b3b94faa DT |
459 | * |
460 | * Returns: errno | |
461 | */ | |
462 | ||
1f981697 SW |
463 | static int gfs2_iter_unstuffed(struct gfs2_inode *ip, struct gfs2_ea_header *ea, |
464 | const char *din, char *dout) | |
b3b94faa | 465 | { |
feaa7bba | 466 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa DT |
467 | struct buffer_head **bh; |
468 | unsigned int amount = GFS2_EA_DATA_LEN(ea); | |
5c676f6d | 469 | unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize); |
b44b84d7 | 470 | __be64 *dataptrs = GFS2_EA2DATAPTRS(ea); |
b3b94faa DT |
471 | unsigned int x; |
472 | int error = 0; | |
1f981697 SW |
473 | unsigned char *pos; |
474 | unsigned cp_size; | |
b3b94faa | 475 | |
16c5f06f | 476 | bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_NOFS); |
b3b94faa DT |
477 | if (!bh) |
478 | return -ENOMEM; | |
479 | ||
480 | for (x = 0; x < nptrs; x++) { | |
c8d57703 | 481 | error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs), 0, 0, |
7276b3b0 | 482 | bh + x); |
b3b94faa DT |
483 | if (error) { |
484 | while (x--) | |
485 | brelse(bh[x]); | |
486 | goto out; | |
487 | } | |
488 | dataptrs++; | |
489 | } | |
490 | ||
491 | for (x = 0; x < nptrs; x++) { | |
7276b3b0 | 492 | error = gfs2_meta_wait(sdp, bh[x]); |
b3b94faa DT |
493 | if (error) { |
494 | for (; x < nptrs; x++) | |
495 | brelse(bh[x]); | |
496 | goto out; | |
497 | } | |
498 | if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) { | |
499 | for (; x < nptrs; x++) | |
500 | brelse(bh[x]); | |
501 | error = -EIO; | |
502 | goto out; | |
503 | } | |
504 | ||
1f981697 SW |
505 | pos = bh[x]->b_data + sizeof(struct gfs2_meta_header); |
506 | cp_size = (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize; | |
b3b94faa | 507 | |
1f981697 SW |
508 | if (dout) { |
509 | memcpy(dout, pos, cp_size); | |
510 | dout += sdp->sd_jbsize; | |
511 | } | |
512 | ||
513 | if (din) { | |
350a9b0a | 514 | gfs2_trans_add_meta(ip->i_gl, bh[x]); |
1f981697 SW |
515 | memcpy(pos, din, cp_size); |
516 | din += sdp->sd_jbsize; | |
517 | } | |
b3b94faa | 518 | |
1f981697 | 519 | amount -= sdp->sd_jbsize; |
b3b94faa DT |
520 | brelse(bh[x]); |
521 | } | |
522 | ||
a91ea69f | 523 | out: |
b3b94faa | 524 | kfree(bh); |
b3b94faa DT |
525 | return error; |
526 | } | |
527 | ||
479c427d SW |
528 | static int gfs2_ea_get_copy(struct gfs2_inode *ip, struct gfs2_ea_location *el, |
529 | char *data, size_t size) | |
b3b94faa | 530 | { |
40b78a32 SW |
531 | int ret; |
532 | size_t len = GFS2_EA_DATA_LEN(el->el_ea); | |
533 | if (len > size) | |
534 | return -ERANGE; | |
535 | ||
b3b94faa | 536 | if (GFS2_EA_IS_STUFFED(el->el_ea)) { |
40b78a32 SW |
537 | memcpy(data, GFS2_EA2DATA(el->el_ea), len); |
538 | return len; | |
539 | } | |
1f981697 | 540 | ret = gfs2_iter_unstuffed(ip, el->el_ea, NULL, data); |
40b78a32 SW |
541 | if (ret < 0) |
542 | return ret; | |
543 | return len; | |
b3b94faa DT |
544 | } |
545 | ||
479c427d SW |
546 | int gfs2_xattr_acl_get(struct gfs2_inode *ip, const char *name, char **ppdata) |
547 | { | |
548 | struct gfs2_ea_location el; | |
549 | int error; | |
550 | int len; | |
551 | char *data; | |
552 | ||
553 | error = gfs2_ea_find(ip, GFS2_EATYPE_SYS, name, &el); | |
554 | if (error) | |
555 | return error; | |
556 | if (!el.el_ea) | |
557 | goto out; | |
558 | if (!GFS2_EA_DATA_LEN(el.el_ea)) | |
559 | goto out; | |
560 | ||
561 | len = GFS2_EA_DATA_LEN(el.el_ea); | |
562 | data = kmalloc(len, GFP_NOFS); | |
563 | error = -ENOMEM; | |
564 | if (data == NULL) | |
565 | goto out; | |
566 | ||
567 | error = gfs2_ea_get_copy(ip, &el, data, len); | |
114b80ce SW |
568 | if (error < 0) |
569 | kfree(data); | |
570 | else | |
571 | *ppdata = data; | |
479c427d SW |
572 | out: |
573 | brelse(el.el_bh); | |
574 | return error; | |
575 | } | |
576 | ||
b3b94faa | 577 | /** |
40b78a32 SW |
578 | * gfs2_xattr_get - Get a GFS2 extended attribute |
579 | * @inode: The inode | |
40b78a32 SW |
580 | * @name: The name of the extended attribute |
581 | * @buffer: The buffer to write the result into | |
582 | * @size: The size of the buffer | |
431547b3 | 583 | * @type: The type of extended attribute |
b3b94faa DT |
584 | * |
585 | * Returns: actual size of data on success, -errno on error | |
586 | */ | |
1a39ba99 AV |
587 | static int __gfs2_xattr_get(struct inode *inode, const char *name, |
588 | void *buffer, size_t size, int type) | |
b3b94faa | 589 | { |
b296821a | 590 | struct gfs2_inode *ip = GFS2_I(inode); |
b3b94faa DT |
591 | struct gfs2_ea_location el; |
592 | int error; | |
593 | ||
3767ac21 | 594 | if (!ip->i_eattr) |
b3b94faa | 595 | return -ENODATA; |
40b78a32 SW |
596 | if (strlen(name) > GFS2_EA_MAX_NAME_LEN) |
597 | return -EINVAL; | |
b3b94faa | 598 | |
40b78a32 | 599 | error = gfs2_ea_find(ip, type, name, &el); |
b3b94faa DT |
600 | if (error) |
601 | return error; | |
602 | if (!el.el_ea) | |
603 | return -ENODATA; | |
86d00636 | 604 | if (size) |
40b78a32 SW |
605 | error = gfs2_ea_get_copy(ip, &el, buffer, size); |
606 | else | |
b3b94faa | 607 | error = GFS2_EA_DATA_LEN(el.el_ea); |
b3b94faa DT |
608 | brelse(el.el_bh); |
609 | ||
610 | return error; | |
611 | } | |
612 | ||
1a39ba99 AV |
613 | static int gfs2_xattr_get(const struct xattr_handler *handler, |
614 | struct dentry *unused, struct inode *inode, | |
615 | const char *name, void *buffer, size_t size) | |
616 | { | |
617 | struct gfs2_inode *ip = GFS2_I(inode); | |
618 | struct gfs2_holder gh; | |
619 | bool need_unlock = false; | |
620 | int ret; | |
621 | ||
622 | /* During lookup, SELinux calls this function with the glock locked. */ | |
623 | ||
624 | if (!gfs2_glock_is_locked_by_me(ip->i_gl)) { | |
625 | ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); | |
626 | if (ret) | |
627 | return ret; | |
628 | need_unlock = true; | |
629 | } | |
630 | ret = __gfs2_xattr_get(inode, name, buffer, size, handler->flags); | |
631 | if (need_unlock) | |
632 | gfs2_glock_dq_uninit(&gh); | |
633 | return ret; | |
634 | } | |
635 | ||
b3b94faa DT |
636 | /** |
637 | * ea_alloc_blk - allocates a new block for extended attributes. | |
638 | * @ip: A pointer to the inode that's getting extended attributes | |
cca195c5 | 639 | * @bhp: Pointer to pointer to a struct buffer_head |
b3b94faa DT |
640 | * |
641 | * Returns: errno | |
642 | */ | |
643 | ||
644 | static int ea_alloc_blk(struct gfs2_inode *ip, struct buffer_head **bhp) | |
645 | { | |
feaa7bba | 646 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa | 647 | struct gfs2_ea_header *ea; |
b45e41d7 | 648 | unsigned int n = 1; |
cd915493 | 649 | u64 block; |
09010978 | 650 | int error; |
b3b94faa | 651 | |
6e87ed0f | 652 | error = gfs2_alloc_blocks(ip, &block, &n, 0, NULL); |
09010978 SW |
653 | if (error) |
654 | return error; | |
5731be53 | 655 | gfs2_trans_add_unrevoke(sdp, block, 1); |
b3b94faa | 656 | *bhp = gfs2_meta_new(ip->i_gl, block); |
350a9b0a | 657 | gfs2_trans_add_meta(ip->i_gl, *bhp); |
b3b94faa DT |
658 | gfs2_metatype_set(*bhp, GFS2_METATYPE_EA, GFS2_FORMAT_EA); |
659 | gfs2_buffer_clear_tail(*bhp, sizeof(struct gfs2_meta_header)); | |
660 | ||
661 | ea = GFS2_EA_BH2FIRST(*bhp); | |
662 | ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize); | |
663 | ea->ea_type = GFS2_EATYPE_UNUSED; | |
664 | ea->ea_flags = GFS2_EAFLAG_LAST; | |
665 | ea->ea_num_ptrs = 0; | |
666 | ||
77658aad | 667 | gfs2_add_inode_blocks(&ip->i_inode, 1); |
b3b94faa DT |
668 | |
669 | return 0; | |
670 | } | |
671 | ||
672 | /** | |
673 | * ea_write - writes the request info to an ea, creating new blocks if | |
674 | * necessary | |
cca195c5 SW |
675 | * @ip: inode that is being modified |
676 | * @ea: the location of the new ea in a block | |
b3b94faa DT |
677 | * @er: the write request |
678 | * | |
679 | * Note: does not update ea_rec_len or the GFS2_EAFLAG_LAST bin of ea_flags | |
680 | * | |
681 | * returns : errno | |
682 | */ | |
683 | ||
684 | static int ea_write(struct gfs2_inode *ip, struct gfs2_ea_header *ea, | |
685 | struct gfs2_ea_request *er) | |
686 | { | |
feaa7bba | 687 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
09010978 | 688 | int error; |
b3b94faa DT |
689 | |
690 | ea->ea_data_len = cpu_to_be32(er->er_data_len); | |
691 | ea->ea_name_len = er->er_name_len; | |
692 | ea->ea_type = er->er_type; | |
693 | ea->__pad = 0; | |
694 | ||
695 | memcpy(GFS2_EA2NAME(ea), er->er_name, er->er_name_len); | |
696 | ||
697 | if (GFS2_EAREQ_SIZE_STUFFED(er) <= sdp->sd_jbsize) { | |
698 | ea->ea_num_ptrs = 0; | |
699 | memcpy(GFS2_EA2DATA(ea), er->er_data, er->er_data_len); | |
700 | } else { | |
b44b84d7 | 701 | __be64 *dataptr = GFS2_EA2DATAPTRS(ea); |
b3b94faa DT |
702 | const char *data = er->er_data; |
703 | unsigned int data_len = er->er_data_len; | |
704 | unsigned int copy; | |
705 | unsigned int x; | |
706 | ||
5c676f6d | 707 | ea->ea_num_ptrs = DIV_ROUND_UP(er->er_data_len, sdp->sd_jbsize); |
b3b94faa DT |
708 | for (x = 0; x < ea->ea_num_ptrs; x++) { |
709 | struct buffer_head *bh; | |
cd915493 | 710 | u64 block; |
b3b94faa | 711 | int mh_size = sizeof(struct gfs2_meta_header); |
b45e41d7 | 712 | unsigned int n = 1; |
b3b94faa | 713 | |
6e87ed0f | 714 | error = gfs2_alloc_blocks(ip, &block, &n, 0, NULL); |
09010978 SW |
715 | if (error) |
716 | return error; | |
5731be53 | 717 | gfs2_trans_add_unrevoke(sdp, block, 1); |
b3b94faa | 718 | bh = gfs2_meta_new(ip->i_gl, block); |
350a9b0a | 719 | gfs2_trans_add_meta(ip->i_gl, bh); |
b3b94faa DT |
720 | gfs2_metatype_set(bh, GFS2_METATYPE_ED, GFS2_FORMAT_ED); |
721 | ||
77658aad | 722 | gfs2_add_inode_blocks(&ip->i_inode, 1); |
b3b94faa | 723 | |
cca195c5 SW |
724 | copy = data_len > sdp->sd_jbsize ? sdp->sd_jbsize : |
725 | data_len; | |
b3b94faa DT |
726 | memcpy(bh->b_data + mh_size, data, copy); |
727 | if (copy < sdp->sd_jbsize) | |
728 | memset(bh->b_data + mh_size + copy, 0, | |
729 | sdp->sd_jbsize - copy); | |
730 | ||
cca195c5 | 731 | *dataptr++ = cpu_to_be64(bh->b_blocknr); |
b3b94faa DT |
732 | data += copy; |
733 | data_len -= copy; | |
734 | ||
735 | brelse(bh); | |
736 | } | |
737 | ||
738 | gfs2_assert_withdraw(sdp, !data_len); | |
739 | } | |
740 | ||
741 | return 0; | |
742 | } | |
743 | ||
744 | typedef int (*ea_skeleton_call_t) (struct gfs2_inode *ip, | |
cca195c5 | 745 | struct gfs2_ea_request *er, void *private); |
b3b94faa DT |
746 | |
747 | static int ea_alloc_skeleton(struct gfs2_inode *ip, struct gfs2_ea_request *er, | |
748 | unsigned int blks, | |
cca195c5 | 749 | ea_skeleton_call_t skeleton_call, void *private) |
b3b94faa | 750 | { |
7b9cff46 | 751 | struct gfs2_alloc_parms ap = { .target = blks }; |
b3b94faa DT |
752 | struct buffer_head *dibh; |
753 | int error; | |
754 | ||
8e2e0047 BP |
755 | error = gfs2_rindex_update(GFS2_SB(&ip->i_inode)); |
756 | if (error) | |
757 | return error; | |
758 | ||
b8fbf471 | 759 | error = gfs2_quota_lock_check(ip, &ap); |
b3b94faa | 760 | if (error) |
5407e242 | 761 | return error; |
b3b94faa | 762 | |
7b9cff46 | 763 | error = gfs2_inplace_reserve(ip, &ap); |
b3b94faa DT |
764 | if (error) |
765 | goto out_gunlock_q; | |
766 | ||
feaa7bba | 767 | error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), |
71f890f7 | 768 | blks + gfs2_rg_blocks(ip, blks) + |
b3b94faa DT |
769 | RES_DINODE + RES_STATFS + RES_QUOTA, 0); |
770 | if (error) | |
771 | goto out_ipres; | |
772 | ||
773 | error = skeleton_call(ip, er, private); | |
774 | if (error) | |
775 | goto out_end_trans; | |
776 | ||
777 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
778 | if (!error) { | |
078cd827 | 779 | ip->i_inode.i_ctime = current_time(&ip->i_inode); |
350a9b0a | 780 | gfs2_trans_add_meta(ip->i_gl, dibh); |
539e5d6b | 781 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa DT |
782 | brelse(dibh); |
783 | } | |
784 | ||
a91ea69f | 785 | out_end_trans: |
feaa7bba | 786 | gfs2_trans_end(GFS2_SB(&ip->i_inode)); |
a91ea69f | 787 | out_ipres: |
b3b94faa | 788 | gfs2_inplace_release(ip); |
a91ea69f | 789 | out_gunlock_q: |
b3b94faa | 790 | gfs2_quota_unlock(ip); |
b3b94faa DT |
791 | return error; |
792 | } | |
793 | ||
794 | static int ea_init_i(struct gfs2_inode *ip, struct gfs2_ea_request *er, | |
795 | void *private) | |
796 | { | |
797 | struct buffer_head *bh; | |
798 | int error; | |
799 | ||
800 | error = ea_alloc_blk(ip, &bh); | |
801 | if (error) | |
802 | return error; | |
803 | ||
3767ac21 | 804 | ip->i_eattr = bh->b_blocknr; |
b3b94faa DT |
805 | error = ea_write(ip, GFS2_EA_BH2FIRST(bh), er); |
806 | ||
807 | brelse(bh); | |
808 | ||
809 | return error; | |
810 | } | |
811 | ||
812 | /** | |
813 | * ea_init - initializes a new eattr block | |
814 | * @ip: | |
815 | * @er: | |
816 | * | |
817 | * Returns: errno | |
818 | */ | |
819 | ||
40b78a32 SW |
820 | static int ea_init(struct gfs2_inode *ip, int type, const char *name, |
821 | const void *data, size_t size) | |
b3b94faa | 822 | { |
40b78a32 | 823 | struct gfs2_ea_request er; |
feaa7bba | 824 | unsigned int jbsize = GFS2_SB(&ip->i_inode)->sd_jbsize; |
b3b94faa DT |
825 | unsigned int blks = 1; |
826 | ||
40b78a32 SW |
827 | er.er_type = type; |
828 | er.er_name = name; | |
829 | er.er_name_len = strlen(name); | |
830 | er.er_data = (void *)data; | |
831 | er.er_data_len = size; | |
832 | ||
833 | if (GFS2_EAREQ_SIZE_STUFFED(&er) > jbsize) | |
834 | blks += DIV_ROUND_UP(er.er_data_len, jbsize); | |
b3b94faa | 835 | |
40b78a32 | 836 | return ea_alloc_skeleton(ip, &er, blks, ea_init_i, NULL); |
b3b94faa DT |
837 | } |
838 | ||
839 | static struct gfs2_ea_header *ea_split_ea(struct gfs2_ea_header *ea) | |
840 | { | |
cd915493 | 841 | u32 ea_size = GFS2_EA_SIZE(ea); |
568f4c96 SW |
842 | struct gfs2_ea_header *new = (struct gfs2_ea_header *)((char *)ea + |
843 | ea_size); | |
cd915493 | 844 | u32 new_size = GFS2_EA_REC_LEN(ea) - ea_size; |
b3b94faa DT |
845 | int last = ea->ea_flags & GFS2_EAFLAG_LAST; |
846 | ||
847 | ea->ea_rec_len = cpu_to_be32(ea_size); | |
848 | ea->ea_flags ^= last; | |
849 | ||
850 | new->ea_rec_len = cpu_to_be32(new_size); | |
851 | new->ea_flags = last; | |
852 | ||
853 | return new; | |
854 | } | |
855 | ||
856 | static void ea_set_remove_stuffed(struct gfs2_inode *ip, | |
857 | struct gfs2_ea_location *el) | |
858 | { | |
859 | struct gfs2_ea_header *ea = el->el_ea; | |
860 | struct gfs2_ea_header *prev = el->el_prev; | |
cd915493 | 861 | u32 len; |
b3b94faa | 862 | |
350a9b0a | 863 | gfs2_trans_add_meta(ip->i_gl, el->el_bh); |
b3b94faa DT |
864 | |
865 | if (!prev || !GFS2_EA_IS_STUFFED(ea)) { | |
866 | ea->ea_type = GFS2_EATYPE_UNUSED; | |
867 | return; | |
868 | } else if (GFS2_EA2NEXT(prev) != ea) { | |
869 | prev = GFS2_EA2NEXT(prev); | |
feaa7bba | 870 | gfs2_assert_withdraw(GFS2_SB(&ip->i_inode), GFS2_EA2NEXT(prev) == ea); |
b3b94faa DT |
871 | } |
872 | ||
873 | len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea); | |
874 | prev->ea_rec_len = cpu_to_be32(len); | |
875 | ||
876 | if (GFS2_EA_IS_LAST(ea)) | |
877 | prev->ea_flags |= GFS2_EAFLAG_LAST; | |
878 | } | |
879 | ||
880 | struct ea_set { | |
881 | int ea_split; | |
882 | ||
883 | struct gfs2_ea_request *es_er; | |
884 | struct gfs2_ea_location *es_el; | |
885 | ||
886 | struct buffer_head *es_bh; | |
887 | struct gfs2_ea_header *es_ea; | |
888 | }; | |
889 | ||
890 | static int ea_set_simple_noalloc(struct gfs2_inode *ip, struct buffer_head *bh, | |
891 | struct gfs2_ea_header *ea, struct ea_set *es) | |
892 | { | |
893 | struct gfs2_ea_request *er = es->es_er; | |
894 | struct buffer_head *dibh; | |
895 | int error; | |
896 | ||
feaa7bba | 897 | error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + 2 * RES_EATTR, 0); |
b3b94faa DT |
898 | if (error) |
899 | return error; | |
900 | ||
350a9b0a | 901 | gfs2_trans_add_meta(ip->i_gl, bh); |
b3b94faa DT |
902 | |
903 | if (es->ea_split) | |
904 | ea = ea_split_ea(ea); | |
905 | ||
906 | ea_write(ip, ea, er); | |
907 | ||
908 | if (es->es_el) | |
909 | ea_set_remove_stuffed(ip, es->es_el); | |
910 | ||
911 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
912 | if (error) | |
913 | goto out; | |
078cd827 | 914 | ip->i_inode.i_ctime = current_time(&ip->i_inode); |
350a9b0a | 915 | gfs2_trans_add_meta(ip->i_gl, dibh); |
539e5d6b | 916 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa | 917 | brelse(dibh); |
a91ea69f | 918 | out: |
feaa7bba | 919 | gfs2_trans_end(GFS2_SB(&ip->i_inode)); |
b3b94faa DT |
920 | return error; |
921 | } | |
922 | ||
923 | static int ea_set_simple_alloc(struct gfs2_inode *ip, | |
924 | struct gfs2_ea_request *er, void *private) | |
925 | { | |
926 | struct ea_set *es = private; | |
927 | struct gfs2_ea_header *ea = es->es_ea; | |
928 | int error; | |
929 | ||
350a9b0a | 930 | gfs2_trans_add_meta(ip->i_gl, es->es_bh); |
b3b94faa DT |
931 | |
932 | if (es->ea_split) | |
933 | ea = ea_split_ea(ea); | |
934 | ||
935 | error = ea_write(ip, ea, er); | |
936 | if (error) | |
937 | return error; | |
938 | ||
939 | if (es->es_el) | |
940 | ea_set_remove_stuffed(ip, es->es_el); | |
941 | ||
942 | return 0; | |
943 | } | |
944 | ||
945 | static int ea_set_simple(struct gfs2_inode *ip, struct buffer_head *bh, | |
946 | struct gfs2_ea_header *ea, struct gfs2_ea_header *prev, | |
947 | void *private) | |
948 | { | |
949 | struct ea_set *es = private; | |
950 | unsigned int size; | |
951 | int stuffed; | |
952 | int error; | |
953 | ||
40b78a32 SW |
954 | stuffed = ea_calc_size(GFS2_SB(&ip->i_inode), es->es_er->er_name_len, |
955 | es->es_er->er_data_len, &size); | |
b3b94faa DT |
956 | |
957 | if (ea->ea_type == GFS2_EATYPE_UNUSED) { | |
958 | if (GFS2_EA_REC_LEN(ea) < size) | |
959 | return 0; | |
960 | if (!GFS2_EA_IS_STUFFED(ea)) { | |
961 | error = ea_remove_unstuffed(ip, bh, ea, prev, 1); | |
962 | if (error) | |
963 | return error; | |
964 | } | |
965 | es->ea_split = 0; | |
966 | } else if (GFS2_EA_REC_LEN(ea) - GFS2_EA_SIZE(ea) >= size) | |
967 | es->ea_split = 1; | |
968 | else | |
969 | return 0; | |
970 | ||
971 | if (stuffed) { | |
972 | error = ea_set_simple_noalloc(ip, bh, ea, es); | |
973 | if (error) | |
974 | return error; | |
975 | } else { | |
976 | unsigned int blks; | |
977 | ||
978 | es->es_bh = bh; | |
979 | es->es_ea = ea; | |
5c676f6d | 980 | blks = 2 + DIV_ROUND_UP(es->es_er->er_data_len, |
feaa7bba | 981 | GFS2_SB(&ip->i_inode)->sd_jbsize); |
b3b94faa DT |
982 | |
983 | error = ea_alloc_skeleton(ip, es->es_er, blks, | |
984 | ea_set_simple_alloc, es); | |
985 | if (error) | |
986 | return error; | |
987 | } | |
988 | ||
989 | return 1; | |
990 | } | |
991 | ||
992 | static int ea_set_block(struct gfs2_inode *ip, struct gfs2_ea_request *er, | |
993 | void *private) | |
994 | { | |
feaa7bba | 995 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa | 996 | struct buffer_head *indbh, *newbh; |
b44b84d7 | 997 | __be64 *eablk; |
b3b94faa DT |
998 | int error; |
999 | int mh_size = sizeof(struct gfs2_meta_header); | |
1000 | ||
383f01fb | 1001 | if (ip->i_diskflags & GFS2_DIF_EA_INDIRECT) { |
b44b84d7 | 1002 | __be64 *end; |
b3b94faa | 1003 | |
c8d57703 | 1004 | error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT, 0, |
7276b3b0 | 1005 | &indbh); |
b3b94faa DT |
1006 | if (error) |
1007 | return error; | |
1008 | ||
1009 | if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) { | |
1010 | error = -EIO; | |
1011 | goto out; | |
1012 | } | |
1013 | ||
b44b84d7 | 1014 | eablk = (__be64 *)(indbh->b_data + mh_size); |
b3b94faa DT |
1015 | end = eablk + sdp->sd_inptrs; |
1016 | ||
1017 | for (; eablk < end; eablk++) | |
1018 | if (!*eablk) | |
1019 | break; | |
1020 | ||
1021 | if (eablk == end) { | |
1022 | error = -ENOSPC; | |
1023 | goto out; | |
1024 | } | |
1025 | ||
350a9b0a | 1026 | gfs2_trans_add_meta(ip->i_gl, indbh); |
b3b94faa | 1027 | } else { |
cd915493 | 1028 | u64 blk; |
b45e41d7 | 1029 | unsigned int n = 1; |
6e87ed0f | 1030 | error = gfs2_alloc_blocks(ip, &blk, &n, 0, NULL); |
09010978 SW |
1031 | if (error) |
1032 | return error; | |
5731be53 | 1033 | gfs2_trans_add_unrevoke(sdp, blk, 1); |
b3b94faa | 1034 | indbh = gfs2_meta_new(ip->i_gl, blk); |
350a9b0a | 1035 | gfs2_trans_add_meta(ip->i_gl, indbh); |
b3b94faa DT |
1036 | gfs2_metatype_set(indbh, GFS2_METATYPE_IN, GFS2_FORMAT_IN); |
1037 | gfs2_buffer_clear_tail(indbh, mh_size); | |
1038 | ||
b44b84d7 | 1039 | eablk = (__be64 *)(indbh->b_data + mh_size); |
3767ac21 SW |
1040 | *eablk = cpu_to_be64(ip->i_eattr); |
1041 | ip->i_eattr = blk; | |
383f01fb | 1042 | ip->i_diskflags |= GFS2_DIF_EA_INDIRECT; |
77658aad | 1043 | gfs2_add_inode_blocks(&ip->i_inode, 1); |
b3b94faa DT |
1044 | |
1045 | eablk++; | |
1046 | } | |
1047 | ||
1048 | error = ea_alloc_blk(ip, &newbh); | |
1049 | if (error) | |
1050 | goto out; | |
1051 | ||
cd915493 | 1052 | *eablk = cpu_to_be64((u64)newbh->b_blocknr); |
b3b94faa DT |
1053 | error = ea_write(ip, GFS2_EA_BH2FIRST(newbh), er); |
1054 | brelse(newbh); | |
1055 | if (error) | |
1056 | goto out; | |
1057 | ||
1058 | if (private) | |
cca195c5 | 1059 | ea_set_remove_stuffed(ip, private); |
b3b94faa | 1060 | |
a91ea69f | 1061 | out: |
b3b94faa | 1062 | brelse(indbh); |
b3b94faa DT |
1063 | return error; |
1064 | } | |
1065 | ||
40b78a32 SW |
1066 | static int ea_set_i(struct gfs2_inode *ip, int type, const char *name, |
1067 | const void *value, size_t size, struct gfs2_ea_location *el) | |
b3b94faa | 1068 | { |
40b78a32 | 1069 | struct gfs2_ea_request er; |
b3b94faa DT |
1070 | struct ea_set es; |
1071 | unsigned int blks = 2; | |
1072 | int error; | |
1073 | ||
40b78a32 SW |
1074 | er.er_type = type; |
1075 | er.er_name = name; | |
1076 | er.er_data = (void *)value; | |
1077 | er.er_name_len = strlen(name); | |
1078 | er.er_data_len = size; | |
1079 | ||
b3b94faa | 1080 | memset(&es, 0, sizeof(struct ea_set)); |
40b78a32 | 1081 | es.es_er = &er; |
b3b94faa DT |
1082 | es.es_el = el; |
1083 | ||
1084 | error = ea_foreach(ip, ea_set_simple, &es); | |
1085 | if (error > 0) | |
1086 | return 0; | |
1087 | if (error) | |
1088 | return error; | |
1089 | ||
383f01fb | 1090 | if (!(ip->i_diskflags & GFS2_DIF_EA_INDIRECT)) |
b3b94faa | 1091 | blks++; |
40b78a32 SW |
1092 | if (GFS2_EAREQ_SIZE_STUFFED(&er) > GFS2_SB(&ip->i_inode)->sd_jbsize) |
1093 | blks += DIV_ROUND_UP(er.er_data_len, GFS2_SB(&ip->i_inode)->sd_jbsize); | |
b3b94faa | 1094 | |
40b78a32 | 1095 | return ea_alloc_skeleton(ip, &er, blks, ea_set_block, el); |
b3b94faa DT |
1096 | } |
1097 | ||
1098 | static int ea_set_remove_unstuffed(struct gfs2_inode *ip, | |
1099 | struct gfs2_ea_location *el) | |
1100 | { | |
1101 | if (el->el_prev && GFS2_EA2NEXT(el->el_prev) != el->el_ea) { | |
1102 | el->el_prev = GFS2_EA2NEXT(el->el_prev); | |
feaa7bba | 1103 | gfs2_assert_withdraw(GFS2_SB(&ip->i_inode), |
b3b94faa DT |
1104 | GFS2_EA2NEXT(el->el_prev) == el->el_ea); |
1105 | } | |
1106 | ||
86d00636 | 1107 | return ea_remove_unstuffed(ip, el->el_bh, el->el_ea, el->el_prev, 0); |
b3b94faa DT |
1108 | } |
1109 | ||
b3b94faa DT |
1110 | static int ea_remove_stuffed(struct gfs2_inode *ip, struct gfs2_ea_location *el) |
1111 | { | |
1112 | struct gfs2_ea_header *ea = el->el_ea; | |
1113 | struct gfs2_ea_header *prev = el->el_prev; | |
1114 | struct buffer_head *dibh; | |
1115 | int error; | |
1116 | ||
feaa7bba | 1117 | error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + RES_EATTR, 0); |
b3b94faa DT |
1118 | if (error) |
1119 | return error; | |
1120 | ||
350a9b0a | 1121 | gfs2_trans_add_meta(ip->i_gl, el->el_bh); |
b3b94faa DT |
1122 | |
1123 | if (prev) { | |
cd915493 | 1124 | u32 len; |
b3b94faa DT |
1125 | |
1126 | len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea); | |
1127 | prev->ea_rec_len = cpu_to_be32(len); | |
1128 | ||
1129 | if (GFS2_EA_IS_LAST(ea)) | |
1130 | prev->ea_flags |= GFS2_EAFLAG_LAST; | |
40b78a32 | 1131 | } else { |
b3b94faa | 1132 | ea->ea_type = GFS2_EATYPE_UNUSED; |
40b78a32 | 1133 | } |
b3b94faa DT |
1134 | |
1135 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1136 | if (!error) { | |
078cd827 | 1137 | ip->i_inode.i_ctime = current_time(&ip->i_inode); |
350a9b0a | 1138 | gfs2_trans_add_meta(ip->i_gl, dibh); |
539e5d6b | 1139 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa | 1140 | brelse(dibh); |
907b9bce | 1141 | } |
b3b94faa | 1142 | |
feaa7bba | 1143 | gfs2_trans_end(GFS2_SB(&ip->i_inode)); |
b3b94faa DT |
1144 | |
1145 | return error; | |
1146 | } | |
1147 | ||
40b78a32 SW |
1148 | /** |
1149 | * gfs2_xattr_remove - Remove a GFS2 extended attribute | |
431547b3 | 1150 | * @ip: The inode |
40b78a32 SW |
1151 | * @type: The type of the extended attribute |
1152 | * @name: The name of the extended attribute | |
1153 | * | |
1154 | * This is not called directly by the VFS since we use the (common) | |
1155 | * scheme of making a "set with NULL data" mean a remove request. Note | |
1156 | * that this is different from a set with zero length data. | |
1157 | * | |
1158 | * Returns: 0, or errno on failure | |
1159 | */ | |
1160 | ||
431547b3 | 1161 | static int gfs2_xattr_remove(struct gfs2_inode *ip, int type, const char *name) |
b3b94faa DT |
1162 | { |
1163 | struct gfs2_ea_location el; | |
1164 | int error; | |
1165 | ||
3767ac21 | 1166 | if (!ip->i_eattr) |
b3b94faa DT |
1167 | return -ENODATA; |
1168 | ||
40b78a32 | 1169 | error = gfs2_ea_find(ip, type, name, &el); |
b3b94faa DT |
1170 | if (error) |
1171 | return error; | |
1172 | if (!el.el_ea) | |
1173 | return -ENODATA; | |
1174 | ||
1175 | if (GFS2_EA_IS_STUFFED(el.el_ea)) | |
1176 | error = ea_remove_stuffed(ip, &el); | |
1177 | else | |
40b78a32 | 1178 | error = ea_remove_unstuffed(ip, el.el_bh, el.el_ea, el.el_prev, 0); |
b3b94faa DT |
1179 | |
1180 | brelse(el.el_bh); | |
1181 | ||
1182 | return error; | |
1183 | } | |
1184 | ||
1185 | /** | |
431547b3 CH |
1186 | * __gfs2_xattr_set - Set (or remove) a GFS2 extended attribute |
1187 | * @ip: The inode | |
40b78a32 SW |
1188 | * @name: The name of the extended attribute |
1189 | * @value: The value of the extended attribute (NULL for remove) | |
1190 | * @size: The size of the @value argument | |
1191 | * @flags: Create or Replace | |
431547b3 | 1192 | * @type: The type of the extended attribute |
b3b94faa | 1193 | * |
40b78a32 SW |
1194 | * See gfs2_xattr_remove() for details of the removal of xattrs. |
1195 | * | |
1196 | * Returns: 0 or errno on failure | |
b3b94faa DT |
1197 | */ |
1198 | ||
431547b3 CH |
1199 | int __gfs2_xattr_set(struct inode *inode, const char *name, |
1200 | const void *value, size_t size, int flags, int type) | |
b3b94faa | 1201 | { |
40b78a32 | 1202 | struct gfs2_inode *ip = GFS2_I(inode); |
431547b3 | 1203 | struct gfs2_sbd *sdp = GFS2_SB(inode); |
40b78a32 SW |
1204 | struct gfs2_ea_location el; |
1205 | unsigned int namel = strlen(name); | |
b3b94faa DT |
1206 | int error; |
1207 | ||
40b78a32 SW |
1208 | if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) |
1209 | return -EPERM; | |
1210 | if (namel > GFS2_EA_MAX_NAME_LEN) | |
1211 | return -ERANGE; | |
b3b94faa | 1212 | |
54aae14b EF |
1213 | if (value == NULL) { |
1214 | error = gfs2_xattr_remove(ip, type, name); | |
1215 | if (error == -ENODATA && !(flags & XATTR_REPLACE)) | |
1216 | error = 0; | |
1217 | return error; | |
1218 | } | |
40b78a32 SW |
1219 | |
1220 | if (ea_check_size(sdp, namel, size)) | |
1221 | return -ERANGE; | |
1222 | ||
1223 | if (!ip->i_eattr) { | |
1224 | if (flags & XATTR_REPLACE) | |
1225 | return -ENODATA; | |
1226 | return ea_init(ip, type, name, value, size); | |
1227 | } | |
1228 | ||
1229 | error = gfs2_ea_find(ip, type, name, &el); | |
b3b94faa DT |
1230 | if (error) |
1231 | return error; | |
1232 | ||
40b78a32 SW |
1233 | if (el.el_ea) { |
1234 | if (ip->i_diskflags & GFS2_DIF_APPENDONLY) { | |
1235 | brelse(el.el_bh); | |
1236 | return -EPERM; | |
1237 | } | |
b3b94faa | 1238 | |
40b78a32 SW |
1239 | error = -EEXIST; |
1240 | if (!(flags & XATTR_CREATE)) { | |
1241 | int unstuffed = !GFS2_EA_IS_STUFFED(el.el_ea); | |
1242 | error = ea_set_i(ip, type, name, value, size, &el); | |
1243 | if (!error && unstuffed) | |
1244 | ea_set_remove_unstuffed(ip, &el); | |
1245 | } | |
1246 | ||
1247 | brelse(el.el_bh); | |
1248 | return error; | |
1249 | } | |
1250 | ||
1251 | error = -ENODATA; | |
1252 | if (!(flags & XATTR_REPLACE)) | |
1253 | error = ea_set_i(ip, type, name, value, size, NULL); | |
b3b94faa DT |
1254 | |
1255 | return error; | |
1256 | } | |
1257 | ||
d9a82a04 | 1258 | static int gfs2_xattr_set(const struct xattr_handler *handler, |
59301226 AV |
1259 | struct dentry *unused, struct inode *inode, |
1260 | const char *name, const void *value, | |
1261 | size_t size, int flags) | |
431547b3 | 1262 | { |
1a39ba99 AV |
1263 | struct gfs2_inode *ip = GFS2_I(inode); |
1264 | struct gfs2_holder gh; | |
1265 | int ret; | |
1266 | ||
1267 | ret = gfs2_rsqa_alloc(ip); | |
1268 | if (ret) | |
1269 | return ret; | |
1270 | ||
1271 | ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); | |
1272 | if (ret) | |
1273 | return ret; | |
1274 | ret = __gfs2_xattr_set(inode, name, value, size, flags, handler->flags); | |
1275 | gfs2_glock_dq_uninit(&gh); | |
1276 | return ret; | |
431547b3 CH |
1277 | } |
1278 | ||
b3b94faa DT |
1279 | static int ea_dealloc_indirect(struct gfs2_inode *ip) |
1280 | { | |
feaa7bba | 1281 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa DT |
1282 | struct gfs2_rgrp_list rlist; |
1283 | struct buffer_head *indbh, *dibh; | |
b44b84d7 | 1284 | __be64 *eablk, *end; |
b3b94faa | 1285 | unsigned int rg_blocks = 0; |
cd915493 | 1286 | u64 bstart = 0; |
b3b94faa DT |
1287 | unsigned int blen = 0; |
1288 | unsigned int blks = 0; | |
1289 | unsigned int x; | |
1290 | int error; | |
1291 | ||
5e2f7d61 BP |
1292 | error = gfs2_rindex_update(sdp); |
1293 | if (error) | |
1294 | return error; | |
1295 | ||
b3b94faa DT |
1296 | memset(&rlist, 0, sizeof(struct gfs2_rgrp_list)); |
1297 | ||
c8d57703 | 1298 | error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT, 0, &indbh); |
b3b94faa DT |
1299 | if (error) |
1300 | return error; | |
1301 | ||
1302 | if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) { | |
1303 | error = -EIO; | |
1304 | goto out; | |
1305 | } | |
1306 | ||
b44b84d7 | 1307 | eablk = (__be64 *)(indbh->b_data + sizeof(struct gfs2_meta_header)); |
b3b94faa DT |
1308 | end = eablk + sdp->sd_inptrs; |
1309 | ||
1310 | for (; eablk < end; eablk++) { | |
cd915493 | 1311 | u64 bn; |
b3b94faa DT |
1312 | |
1313 | if (!*eablk) | |
1314 | break; | |
1315 | bn = be64_to_cpu(*eablk); | |
1316 | ||
1317 | if (bstart + blen == bn) | |
1318 | blen++; | |
1319 | else { | |
1320 | if (bstart) | |
70b0c365 | 1321 | gfs2_rlist_add(ip, &rlist, bstart); |
b3b94faa DT |
1322 | bstart = bn; |
1323 | blen = 1; | |
1324 | } | |
1325 | blks++; | |
1326 | } | |
1327 | if (bstart) | |
70b0c365 | 1328 | gfs2_rlist_add(ip, &rlist, bstart); |
b3b94faa DT |
1329 | else |
1330 | goto out; | |
1331 | ||
fe6c991c | 1332 | gfs2_rlist_alloc(&rlist, LM_ST_EXCLUSIVE); |
b3b94faa DT |
1333 | |
1334 | for (x = 0; x < rlist.rl_rgrps; x++) { | |
6f6597ba AG |
1335 | struct gfs2_rgrpd *rgd = gfs2_glock2rgrp(rlist.rl_ghs[x].gh_gl); |
1336 | ||
bb8d8a6f | 1337 | rg_blocks += rgd->rd_length; |
b3b94faa DT |
1338 | } |
1339 | ||
1340 | error = gfs2_glock_nq_m(rlist.rl_rgrps, rlist.rl_ghs); | |
1341 | if (error) | |
1342 | goto out_rlist_free; | |
1343 | ||
cca195c5 SW |
1344 | error = gfs2_trans_begin(sdp, rg_blocks + RES_DINODE + RES_INDIRECT + |
1345 | RES_STATFS + RES_QUOTA, blks); | |
b3b94faa DT |
1346 | if (error) |
1347 | goto out_gunlock; | |
1348 | ||
350a9b0a | 1349 | gfs2_trans_add_meta(ip->i_gl, indbh); |
b3b94faa | 1350 | |
b44b84d7 | 1351 | eablk = (__be64 *)(indbh->b_data + sizeof(struct gfs2_meta_header)); |
b3b94faa DT |
1352 | bstart = 0; |
1353 | blen = 0; | |
1354 | ||
1355 | for (; eablk < end; eablk++) { | |
cd915493 | 1356 | u64 bn; |
b3b94faa DT |
1357 | |
1358 | if (!*eablk) | |
1359 | break; | |
1360 | bn = be64_to_cpu(*eablk); | |
1361 | ||
1362 | if (bstart + blen == bn) | |
1363 | blen++; | |
1364 | else { | |
1365 | if (bstart) | |
1366 | gfs2_free_meta(ip, bstart, blen); | |
1367 | bstart = bn; | |
1368 | blen = 1; | |
1369 | } | |
1370 | ||
1371 | *eablk = 0; | |
77658aad | 1372 | gfs2_add_inode_blocks(&ip->i_inode, -1); |
b3b94faa DT |
1373 | } |
1374 | if (bstart) | |
1375 | gfs2_free_meta(ip, bstart, blen); | |
1376 | ||
383f01fb | 1377 | ip->i_diskflags &= ~GFS2_DIF_EA_INDIRECT; |
b3b94faa DT |
1378 | |
1379 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1380 | if (!error) { | |
350a9b0a | 1381 | gfs2_trans_add_meta(ip->i_gl, dibh); |
539e5d6b | 1382 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa DT |
1383 | brelse(dibh); |
1384 | } | |
1385 | ||
1386 | gfs2_trans_end(sdp); | |
1387 | ||
a91ea69f | 1388 | out_gunlock: |
b3b94faa | 1389 | gfs2_glock_dq_m(rlist.rl_rgrps, rlist.rl_ghs); |
a91ea69f | 1390 | out_rlist_free: |
b3b94faa | 1391 | gfs2_rlist_free(&rlist); |
a91ea69f | 1392 | out: |
b3b94faa | 1393 | brelse(indbh); |
b3b94faa DT |
1394 | return error; |
1395 | } | |
1396 | ||
1397 | static int ea_dealloc_block(struct gfs2_inode *ip) | |
1398 | { | |
feaa7bba | 1399 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa DT |
1400 | struct gfs2_rgrpd *rgd; |
1401 | struct buffer_head *dibh; | |
564e12b1 | 1402 | struct gfs2_holder gh; |
b3b94faa DT |
1403 | int error; |
1404 | ||
5e2f7d61 BP |
1405 | error = gfs2_rindex_update(sdp); |
1406 | if (error) | |
1407 | return error; | |
1408 | ||
66fc061b | 1409 | rgd = gfs2_blk2rgrpd(sdp, ip->i_eattr, 1); |
b3b94faa DT |
1410 | if (!rgd) { |
1411 | gfs2_consist_inode(ip); | |
1412 | return -EIO; | |
1413 | } | |
1414 | ||
564e12b1 | 1415 | error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &gh); |
b3b94faa DT |
1416 | if (error) |
1417 | return error; | |
1418 | ||
cca195c5 SW |
1419 | error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_DINODE + RES_STATFS + |
1420 | RES_QUOTA, 1); | |
b3b94faa DT |
1421 | if (error) |
1422 | goto out_gunlock; | |
1423 | ||
3767ac21 | 1424 | gfs2_free_meta(ip, ip->i_eattr, 1); |
b3b94faa | 1425 | |
3767ac21 | 1426 | ip->i_eattr = 0; |
77658aad | 1427 | gfs2_add_inode_blocks(&ip->i_inode, -1); |
b3b94faa DT |
1428 | |
1429 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1430 | if (!error) { | |
350a9b0a | 1431 | gfs2_trans_add_meta(ip->i_gl, dibh); |
539e5d6b | 1432 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa DT |
1433 | brelse(dibh); |
1434 | } | |
1435 | ||
1436 | gfs2_trans_end(sdp); | |
1437 | ||
a91ea69f | 1438 | out_gunlock: |
564e12b1 | 1439 | gfs2_glock_dq_uninit(&gh); |
b3b94faa DT |
1440 | return error; |
1441 | } | |
1442 | ||
1443 | /** | |
1444 | * gfs2_ea_dealloc - deallocate the extended attribute fork | |
1445 | * @ip: the inode | |
1446 | * | |
1447 | * Returns: errno | |
1448 | */ | |
1449 | ||
1450 | int gfs2_ea_dealloc(struct gfs2_inode *ip) | |
1451 | { | |
b3b94faa DT |
1452 | int error; |
1453 | ||
8e2e0047 BP |
1454 | error = gfs2_rindex_update(GFS2_SB(&ip->i_inode)); |
1455 | if (error) | |
1456 | return error; | |
1457 | ||
f4108a60 | 1458 | error = gfs2_quota_hold(ip, NO_UID_QUOTA_CHANGE, NO_GID_QUOTA_CHANGE); |
b3b94faa | 1459 | if (error) |
5407e242 | 1460 | return error; |
b3b94faa | 1461 | |
b3b94faa DT |
1462 | error = ea_foreach(ip, ea_dealloc_unstuffed, NULL); |
1463 | if (error) | |
8339ee54 | 1464 | goto out_quota; |
b3b94faa | 1465 | |
383f01fb | 1466 | if (ip->i_diskflags & GFS2_DIF_EA_INDIRECT) { |
b3b94faa DT |
1467 | error = ea_dealloc_indirect(ip); |
1468 | if (error) | |
8339ee54 | 1469 | goto out_quota; |
b3b94faa DT |
1470 | } |
1471 | ||
1472 | error = ea_dealloc_block(ip); | |
1473 | ||
a91ea69f | 1474 | out_quota: |
b3b94faa | 1475 | gfs2_quota_unhold(ip); |
b3b94faa DT |
1476 | return error; |
1477 | } | |
1478 | ||
b7bb0a12 | 1479 | static const struct xattr_handler gfs2_xattr_user_handler = { |
40b78a32 | 1480 | .prefix = XATTR_USER_PREFIX, |
431547b3 CH |
1481 | .flags = GFS2_EATYPE_USR, |
1482 | .get = gfs2_xattr_get, | |
1483 | .set = gfs2_xattr_set, | |
40b78a32 SW |
1484 | }; |
1485 | ||
b7bb0a12 | 1486 | static const struct xattr_handler gfs2_xattr_security_handler = { |
40b78a32 | 1487 | .prefix = XATTR_SECURITY_PREFIX, |
431547b3 CH |
1488 | .flags = GFS2_EATYPE_SECURITY, |
1489 | .get = gfs2_xattr_get, | |
1490 | .set = gfs2_xattr_set, | |
40b78a32 SW |
1491 | }; |
1492 | ||
b7bb0a12 | 1493 | const struct xattr_handler *gfs2_xattr_handlers[] = { |
40b78a32 SW |
1494 | &gfs2_xattr_user_handler, |
1495 | &gfs2_xattr_security_handler, | |
e01580bf CH |
1496 | &posix_acl_access_xattr_handler, |
1497 | &posix_acl_default_xattr_handler, | |
40b78a32 SW |
1498 | NULL, |
1499 | }; | |
1500 |