Commit | Line | Data |
---|---|---|
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> |
b3b94faa DT |
17 | #include <asm/uaccess.h> |
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" | |
28 | #include "trans.h" | |
5c676f6d | 29 | #include "util.h" |
b3b94faa DT |
30 | |
31 | /** | |
32 | * ea_calc_size - returns the acutal number of bytes the request will take up | |
33 | * (not counting any unstuffed data blocks) | |
34 | * @sdp: | |
35 | * @er: | |
36 | * @size: | |
37 | * | |
38 | * Returns: 1 if the EA should be stuffed | |
39 | */ | |
40 | ||
40b78a32 | 41 | static int ea_calc_size(struct gfs2_sbd *sdp, unsigned int nsize, size_t dsize, |
b3b94faa DT |
42 | unsigned int *size) |
43 | { | |
40b78a32 SW |
44 | unsigned int jbsize = sdp->sd_jbsize; |
45 | ||
46 | /* Stuffed */ | |
47 | *size = ALIGN(sizeof(struct gfs2_ea_header) + nsize + dsize, 8); | |
48 | ||
49 | if (*size <= jbsize) | |
b3b94faa DT |
50 | return 1; |
51 | ||
40b78a32 SW |
52 | /* Unstuffed */ |
53 | *size = ALIGN(sizeof(struct gfs2_ea_header) + nsize + | |
54 | (sizeof(__be64) * DIV_ROUND_UP(dsize, jbsize)), 8); | |
b3b94faa DT |
55 | |
56 | return 0; | |
57 | } | |
58 | ||
40b78a32 | 59 | static int ea_check_size(struct gfs2_sbd *sdp, unsigned int nsize, size_t dsize) |
b3b94faa DT |
60 | { |
61 | unsigned int size; | |
62 | ||
40b78a32 | 63 | if (dsize > GFS2_EA_MAX_DATA_LEN) |
b3b94faa DT |
64 | return -ERANGE; |
65 | ||
40b78a32 | 66 | ea_calc_size(sdp, nsize, dsize, &size); |
b3b94faa DT |
67 | |
68 | /* This can only happen with 512 byte blocks */ | |
69 | if (size > sdp->sd_jbsize) | |
70 | return -ERANGE; | |
71 | ||
72 | return 0; | |
73 | } | |
74 | ||
cca195c5 | 75 | typedef int (*ea_call_t) (struct gfs2_inode *ip, struct buffer_head *bh, |
b3b94faa | 76 | struct gfs2_ea_header *ea, |
cca195c5 | 77 | struct gfs2_ea_header *prev, void *private); |
b3b94faa DT |
78 | |
79 | static int ea_foreach_i(struct gfs2_inode *ip, struct buffer_head *bh, | |
80 | ea_call_t ea_call, void *data) | |
81 | { | |
82 | struct gfs2_ea_header *ea, *prev = NULL; | |
83 | int error = 0; | |
84 | ||
feaa7bba | 85 | if (gfs2_metatype_check(GFS2_SB(&ip->i_inode), bh, GFS2_METATYPE_EA)) |
b3b94faa DT |
86 | return -EIO; |
87 | ||
88 | for (ea = GFS2_EA_BH2FIRST(bh);; prev = ea, ea = GFS2_EA2NEXT(ea)) { | |
89 | if (!GFS2_EA_REC_LEN(ea)) | |
90 | goto fail; | |
cca195c5 SW |
91 | if (!(bh->b_data <= (char *)ea && (char *)GFS2_EA2NEXT(ea) <= |
92 | bh->b_data + bh->b_size)) | |
b3b94faa DT |
93 | goto fail; |
94 | if (!GFS2_EATYPE_VALID(ea->ea_type)) | |
95 | goto fail; | |
96 | ||
97 | error = ea_call(ip, bh, ea, prev, data); | |
98 | if (error) | |
99 | return error; | |
100 | ||
101 | if (GFS2_EA_IS_LAST(ea)) { | |
102 | if ((char *)GFS2_EA2NEXT(ea) != | |
103 | bh->b_data + bh->b_size) | |
104 | goto fail; | |
105 | break; | |
106 | } | |
107 | } | |
108 | ||
109 | return error; | |
110 | ||
a91ea69f | 111 | fail: |
b3b94faa DT |
112 | gfs2_consist_inode(ip); |
113 | return -EIO; | |
114 | } | |
115 | ||
116 | static int ea_foreach(struct gfs2_inode *ip, ea_call_t ea_call, void *data) | |
117 | { | |
118 | struct buffer_head *bh, *eabh; | |
b44b84d7 | 119 | __be64 *eablk, *end; |
b3b94faa DT |
120 | int error; |
121 | ||
c8d57703 | 122 | error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT, 0, &bh); |
b3b94faa DT |
123 | if (error) |
124 | return error; | |
125 | ||
383f01fb | 126 | if (!(ip->i_diskflags & GFS2_DIF_EA_INDIRECT)) { |
b3b94faa DT |
127 | error = ea_foreach_i(ip, bh, ea_call, data); |
128 | goto out; | |
129 | } | |
130 | ||
feaa7bba | 131 | if (gfs2_metatype_check(GFS2_SB(&ip->i_inode), bh, GFS2_METATYPE_IN)) { |
b3b94faa DT |
132 | error = -EIO; |
133 | goto out; | |
134 | } | |
135 | ||
b44b84d7 | 136 | eablk = (__be64 *)(bh->b_data + sizeof(struct gfs2_meta_header)); |
feaa7bba | 137 | end = eablk + GFS2_SB(&ip->i_inode)->sd_inptrs; |
b3b94faa DT |
138 | |
139 | for (; eablk < end; eablk++) { | |
cd915493 | 140 | u64 bn; |
b3b94faa DT |
141 | |
142 | if (!*eablk) | |
143 | break; | |
144 | bn = be64_to_cpu(*eablk); | |
145 | ||
c8d57703 | 146 | error = gfs2_meta_read(ip->i_gl, bn, DIO_WAIT, 0, &eabh); |
b3b94faa DT |
147 | if (error) |
148 | break; | |
149 | error = ea_foreach_i(ip, eabh, ea_call, data); | |
150 | brelse(eabh); | |
151 | if (error) | |
152 | break; | |
153 | } | |
a91ea69f | 154 | out: |
b3b94faa | 155 | brelse(bh); |
b3b94faa DT |
156 | return error; |
157 | } | |
158 | ||
159 | struct ea_find { | |
40b78a32 SW |
160 | int type; |
161 | const char *name; | |
162 | size_t namel; | |
b3b94faa DT |
163 | struct gfs2_ea_location *ef_el; |
164 | }; | |
165 | ||
166 | static int ea_find_i(struct gfs2_inode *ip, struct buffer_head *bh, | |
167 | struct gfs2_ea_header *ea, struct gfs2_ea_header *prev, | |
168 | void *private) | |
169 | { | |
170 | struct ea_find *ef = private; | |
b3b94faa DT |
171 | |
172 | if (ea->ea_type == GFS2_EATYPE_UNUSED) | |
173 | return 0; | |
174 | ||
40b78a32 SW |
175 | if (ea->ea_type == ef->type) { |
176 | if (ea->ea_name_len == ef->namel && | |
177 | !memcmp(GFS2_EA2NAME(ea), ef->name, ea->ea_name_len)) { | |
b3b94faa DT |
178 | struct gfs2_ea_location *el = ef->ef_el; |
179 | get_bh(bh); | |
180 | el->el_bh = bh; | |
181 | el->el_ea = ea; | |
182 | el->el_prev = prev; | |
183 | return 1; | |
184 | } | |
185 | } | |
186 | ||
b3b94faa DT |
187 | return 0; |
188 | } | |
189 | ||
479c427d SW |
190 | static int gfs2_ea_find(struct gfs2_inode *ip, int type, const char *name, |
191 | struct gfs2_ea_location *el) | |
b3b94faa DT |
192 | { |
193 | struct ea_find ef; | |
194 | int error; | |
195 | ||
40b78a32 SW |
196 | ef.type = type; |
197 | ef.name = name; | |
198 | ef.namel = strlen(name); | |
b3b94faa DT |
199 | ef.ef_el = el; |
200 | ||
201 | memset(el, 0, sizeof(struct gfs2_ea_location)); | |
202 | ||
203 | error = ea_foreach(ip, ea_find_i, &ef); | |
204 | if (error > 0) | |
205 | return 0; | |
206 | ||
207 | return error; | |
208 | } | |
209 | ||
210 | /** | |
211 | * ea_dealloc_unstuffed - | |
212 | * @ip: | |
213 | * @bh: | |
214 | * @ea: | |
215 | * @prev: | |
216 | * @private: | |
217 | * | |
218 | * Take advantage of the fact that all unstuffed blocks are | |
219 | * allocated from the same RG. But watch, this may not always | |
220 | * be true. | |
221 | * | |
222 | * Returns: errno | |
223 | */ | |
224 | ||
225 | static int ea_dealloc_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh, | |
226 | struct gfs2_ea_header *ea, | |
227 | struct gfs2_ea_header *prev, void *private) | |
228 | { | |
229 | int *leave = private; | |
feaa7bba | 230 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa DT |
231 | struct gfs2_rgrpd *rgd; |
232 | struct gfs2_holder rg_gh; | |
233 | struct buffer_head *dibh; | |
b44b84d7 AV |
234 | __be64 *dataptrs; |
235 | u64 bn = 0; | |
cd915493 | 236 | u64 bstart = 0; |
b3b94faa DT |
237 | unsigned int blen = 0; |
238 | unsigned int blks = 0; | |
239 | unsigned int x; | |
240 | int error; | |
241 | ||
5e2f7d61 BP |
242 | error = gfs2_rindex_update(sdp); |
243 | if (error) | |
244 | return error; | |
245 | ||
b3b94faa DT |
246 | if (GFS2_EA_IS_STUFFED(ea)) |
247 | return 0; | |
248 | ||
249 | dataptrs = GFS2_EA2DATAPTRS(ea); | |
cca195c5 | 250 | for (x = 0; x < ea->ea_num_ptrs; x++, dataptrs++) { |
b3b94faa DT |
251 | if (*dataptrs) { |
252 | blks++; | |
253 | bn = be64_to_cpu(*dataptrs); | |
254 | } | |
cca195c5 | 255 | } |
b3b94faa DT |
256 | if (!blks) |
257 | return 0; | |
258 | ||
66fc061b | 259 | rgd = gfs2_blk2rgrpd(sdp, bn, 1); |
b3b94faa DT |
260 | 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 | ||
bb8d8a6f | 269 | error = gfs2_trans_begin(sdp, rgd->rd_length + RES_DINODE + |
cca195c5 | 270 | RES_EATTR + RES_STATFS + RES_QUOTA, blks); |
b3b94faa DT |
271 | if (error) |
272 | goto out_gunlock; | |
273 | ||
350a9b0a | 274 | gfs2_trans_add_meta(ip->i_gl, bh); |
b3b94faa DT |
275 | |
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; | |
77658aad | 292 | gfs2_add_inode_blocks(&ip->i_inode, -1); |
b3b94faa DT |
293 | } |
294 | if (bstart) | |
295 | gfs2_free_meta(ip, bstart, blen); | |
296 | ||
297 | if (prev && !leave) { | |
cd915493 | 298 | u32 len; |
b3b94faa DT |
299 | |
300 | len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea); | |
301 | prev->ea_rec_len = cpu_to_be32(len); | |
302 | ||
303 | if (GFS2_EA_IS_LAST(ea)) | |
304 | prev->ea_flags |= GFS2_EAFLAG_LAST; | |
305 | } else { | |
306 | ea->ea_type = GFS2_EATYPE_UNUSED; | |
307 | ea->ea_num_ptrs = 0; | |
308 | } | |
309 | ||
310 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
311 | if (!error) { | |
4bd91ba1 | 312 | ip->i_inode.i_ctime = CURRENT_TIME; |
350a9b0a | 313 | gfs2_trans_add_meta(ip->i_gl, dibh); |
539e5d6b | 314 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa DT |
315 | brelse(dibh); |
316 | } | |
317 | ||
318 | gfs2_trans_end(sdp); | |
319 | ||
a91ea69f | 320 | out_gunlock: |
b3b94faa | 321 | gfs2_glock_dq_uninit(&rg_gh); |
b3b94faa DT |
322 | return error; |
323 | } | |
324 | ||
325 | static int ea_remove_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh, | |
326 | struct gfs2_ea_header *ea, | |
327 | struct gfs2_ea_header *prev, int leave) | |
328 | { | |
b3b94faa DT |
329 | int error; |
330 | ||
8e2e0047 BP |
331 | error = gfs2_rindex_update(GFS2_SB(&ip->i_inode)); |
332 | if (error) | |
333 | return error; | |
334 | ||
f4108a60 | 335 | error = gfs2_quota_hold(ip, NO_UID_QUOTA_CHANGE, NO_GID_QUOTA_CHANGE); |
b3b94faa DT |
336 | if (error) |
337 | goto out_alloc; | |
338 | ||
cca195c5 | 339 | error = ea_dealloc_unstuffed(ip, bh, ea, prev, (leave) ? &error : NULL); |
b3b94faa | 340 | |
b3b94faa | 341 | gfs2_quota_unhold(ip); |
a91ea69f | 342 | out_alloc: |
b3b94faa DT |
343 | return error; |
344 | } | |
345 | ||
b3b94faa DT |
346 | struct ea_list { |
347 | struct gfs2_ea_request *ei_er; | |
348 | unsigned int ei_size; | |
349 | }; | |
350 | ||
40b78a32 SW |
351 | static inline unsigned int gfs2_ea_strlen(struct gfs2_ea_header *ea) |
352 | { | |
353 | switch (ea->ea_type) { | |
354 | case GFS2_EATYPE_USR: | |
355 | return 5 + ea->ea_name_len + 1; | |
356 | case GFS2_EATYPE_SYS: | |
357 | return 7 + ea->ea_name_len + 1; | |
358 | case GFS2_EATYPE_SECURITY: | |
359 | return 9 + ea->ea_name_len + 1; | |
360 | default: | |
361 | return 0; | |
362 | } | |
363 | } | |
364 | ||
b3b94faa DT |
365 | static int ea_list_i(struct gfs2_inode *ip, struct buffer_head *bh, |
366 | struct gfs2_ea_header *ea, struct gfs2_ea_header *prev, | |
367 | void *private) | |
368 | { | |
369 | struct ea_list *ei = private; | |
370 | struct gfs2_ea_request *er = ei->ei_er; | |
639b6d79 | 371 | unsigned int ea_size = gfs2_ea_strlen(ea); |
b3b94faa DT |
372 | |
373 | if (ea->ea_type == GFS2_EATYPE_UNUSED) | |
374 | return 0; | |
375 | ||
376 | if (er->er_data_len) { | |
01eb7c07 SW |
377 | char *prefix = NULL; |
378 | unsigned int l = 0; | |
b3b94faa DT |
379 | char c = 0; |
380 | ||
381 | if (ei->ei_size + ea_size > er->er_data_len) | |
382 | return -ERANGE; | |
383 | ||
639b6d79 RH |
384 | switch (ea->ea_type) { |
385 | case GFS2_EATYPE_USR: | |
b3b94faa DT |
386 | prefix = "user."; |
387 | l = 5; | |
639b6d79 RH |
388 | break; |
389 | case GFS2_EATYPE_SYS: | |
b3b94faa DT |
390 | prefix = "system."; |
391 | l = 7; | |
639b6d79 RH |
392 | break; |
393 | case GFS2_EATYPE_SECURITY: | |
394 | prefix = "security."; | |
395 | l = 9; | |
396 | break; | |
b3b94faa DT |
397 | } |
398 | ||
01eb7c07 SW |
399 | BUG_ON(l == 0); |
400 | ||
90cdd208 SW |
401 | memcpy(er->er_data + ei->ei_size, prefix, l); |
402 | memcpy(er->er_data + ei->ei_size + l, GFS2_EA2NAME(ea), | |
b3b94faa | 403 | ea->ea_name_len); |
90cdd208 | 404 | memcpy(er->er_data + ei->ei_size + ea_size - 1, &c, 1); |
b3b94faa DT |
405 | } |
406 | ||
407 | ei->ei_size += ea_size; | |
408 | ||
409 | return 0; | |
410 | } | |
411 | ||
412 | /** | |
40b78a32 SW |
413 | * gfs2_listxattr - List gfs2 extended attributes |
414 | * @dentry: The dentry whose inode we are interested in | |
415 | * @buffer: The buffer to write the results | |
416 | * @size: The size of the buffer | |
b3b94faa DT |
417 | * |
418 | * Returns: actual size of data on success, -errno on error | |
419 | */ | |
420 | ||
40b78a32 | 421 | ssize_t gfs2_listxattr(struct dentry *dentry, char *buffer, size_t size) |
b3b94faa | 422 | { |
2b0143b5 | 423 | struct gfs2_inode *ip = GFS2_I(d_inode(dentry)); |
40b78a32 | 424 | struct gfs2_ea_request er; |
b3b94faa DT |
425 | struct gfs2_holder i_gh; |
426 | int error; | |
427 | ||
40b78a32 SW |
428 | memset(&er, 0, sizeof(struct gfs2_ea_request)); |
429 | if (size) { | |
430 | er.er_data = buffer; | |
431 | er.er_data_len = size; | |
b3b94faa DT |
432 | } |
433 | ||
cca195c5 | 434 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh); |
b3b94faa DT |
435 | if (error) |
436 | return error; | |
437 | ||
3767ac21 | 438 | if (ip->i_eattr) { |
40b78a32 | 439 | struct ea_list ei = { .ei_er = &er, .ei_size = 0 }; |
b3b94faa DT |
440 | |
441 | error = ea_foreach(ip, ea_list_i, &ei); | |
442 | if (!error) | |
443 | error = ei.ei_size; | |
444 | } | |
445 | ||
446 | gfs2_glock_dq_uninit(&i_gh); | |
447 | ||
448 | return error; | |
449 | } | |
450 | ||
451 | /** | |
1f981697 SW |
452 | * ea_iter_unstuffed - copies the unstuffed xattr data to/from the |
453 | * request buffer | |
cca195c5 SW |
454 | * @ip: The GFS2 inode |
455 | * @ea: The extended attribute header structure | |
1f981697 SW |
456 | * @din: The data to be copied in |
457 | * @dout: The data to be copied out (one of din,dout will be NULL) | |
b3b94faa DT |
458 | * |
459 | * Returns: errno | |
460 | */ | |
461 | ||
1f981697 SW |
462 | static int gfs2_iter_unstuffed(struct gfs2_inode *ip, struct gfs2_ea_header *ea, |
463 | const char *din, char *dout) | |
b3b94faa | 464 | { |
feaa7bba | 465 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa DT |
466 | struct buffer_head **bh; |
467 | unsigned int amount = GFS2_EA_DATA_LEN(ea); | |
5c676f6d | 468 | unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize); |
b44b84d7 | 469 | __be64 *dataptrs = GFS2_EA2DATAPTRS(ea); |
b3b94faa DT |
470 | unsigned int x; |
471 | int error = 0; | |
1f981697 SW |
472 | unsigned char *pos; |
473 | unsigned cp_size; | |
b3b94faa | 474 | |
16c5f06f | 475 | bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_NOFS); |
b3b94faa DT |
476 | if (!bh) |
477 | return -ENOMEM; | |
478 | ||
479 | for (x = 0; x < nptrs; x++) { | |
c8d57703 | 480 | error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs), 0, 0, |
7276b3b0 | 481 | bh + x); |
b3b94faa DT |
482 | if (error) { |
483 | while (x--) | |
484 | brelse(bh[x]); | |
485 | goto out; | |
486 | } | |
487 | dataptrs++; | |
488 | } | |
489 | ||
490 | for (x = 0; x < nptrs; x++) { | |
7276b3b0 | 491 | error = gfs2_meta_wait(sdp, bh[x]); |
b3b94faa DT |
492 | if (error) { |
493 | for (; x < nptrs; x++) | |
494 | brelse(bh[x]); | |
495 | goto out; | |
496 | } | |
497 | if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) { | |
498 | for (; x < nptrs; x++) | |
499 | brelse(bh[x]); | |
500 | error = -EIO; | |
501 | goto out; | |
502 | } | |
503 | ||
1f981697 SW |
504 | pos = bh[x]->b_data + sizeof(struct gfs2_meta_header); |
505 | cp_size = (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize; | |
b3b94faa | 506 | |
1f981697 SW |
507 | if (dout) { |
508 | memcpy(dout, pos, cp_size); | |
509 | dout += sdp->sd_jbsize; | |
510 | } | |
511 | ||
512 | if (din) { | |
350a9b0a | 513 | gfs2_trans_add_meta(ip->i_gl, bh[x]); |
1f981697 SW |
514 | memcpy(pos, din, cp_size); |
515 | din += sdp->sd_jbsize; | |
516 | } | |
b3b94faa | 517 | |
1f981697 | 518 | amount -= sdp->sd_jbsize; |
b3b94faa DT |
519 | brelse(bh[x]); |
520 | } | |
521 | ||
a91ea69f | 522 | out: |
b3b94faa | 523 | kfree(bh); |
b3b94faa DT |
524 | return error; |
525 | } | |
526 | ||
479c427d SW |
527 | static int gfs2_ea_get_copy(struct gfs2_inode *ip, struct gfs2_ea_location *el, |
528 | char *data, size_t size) | |
b3b94faa | 529 | { |
40b78a32 SW |
530 | int ret; |
531 | size_t len = GFS2_EA_DATA_LEN(el->el_ea); | |
532 | if (len > size) | |
533 | return -ERANGE; | |
534 | ||
b3b94faa | 535 | if (GFS2_EA_IS_STUFFED(el->el_ea)) { |
40b78a32 SW |
536 | memcpy(data, GFS2_EA2DATA(el->el_ea), len); |
537 | return len; | |
538 | } | |
1f981697 | 539 | ret = gfs2_iter_unstuffed(ip, el->el_ea, NULL, data); |
40b78a32 SW |
540 | if (ret < 0) |
541 | return ret; | |
542 | return len; | |
b3b94faa DT |
543 | } |
544 | ||
479c427d SW |
545 | int gfs2_xattr_acl_get(struct gfs2_inode *ip, const char *name, char **ppdata) |
546 | { | |
547 | struct gfs2_ea_location el; | |
548 | int error; | |
549 | int len; | |
550 | char *data; | |
551 | ||
552 | error = gfs2_ea_find(ip, GFS2_EATYPE_SYS, name, &el); | |
553 | if (error) | |
554 | return error; | |
555 | if (!el.el_ea) | |
556 | goto out; | |
557 | if (!GFS2_EA_DATA_LEN(el.el_ea)) | |
558 | goto out; | |
559 | ||
560 | len = GFS2_EA_DATA_LEN(el.el_ea); | |
561 | data = kmalloc(len, GFP_NOFS); | |
562 | error = -ENOMEM; | |
563 | if (data == NULL) | |
564 | goto out; | |
565 | ||
566 | error = gfs2_ea_get_copy(ip, &el, data, len); | |
114b80ce SW |
567 | if (error < 0) |
568 | kfree(data); | |
569 | else | |
570 | *ppdata = data; | |
479c427d SW |
571 | out: |
572 | brelse(el.el_bh); | |
573 | return error; | |
574 | } | |
575 | ||
b3b94faa | 576 | /** |
40b78a32 SW |
577 | * gfs2_xattr_get - Get a GFS2 extended attribute |
578 | * @inode: The inode | |
40b78a32 SW |
579 | * @name: The name of the extended attribute |
580 | * @buffer: The buffer to write the result into | |
581 | * @size: The size of the buffer | |
431547b3 | 582 | * @type: The type of extended attribute |
b3b94faa DT |
583 | * |
584 | * Returns: actual size of data on success, -errno on error | |
585 | */ | |
d9a82a04 AG |
586 | static int gfs2_xattr_get(const struct xattr_handler *handler, |
587 | struct dentry *dentry, const char *name, | |
588 | void *buffer, size_t size) | |
b3b94faa | 589 | { |
2b0143b5 | 590 | struct gfs2_inode *ip = GFS2_I(d_inode(dentry)); |
b3b94faa | 591 | struct gfs2_ea_location el; |
d9a82a04 | 592 | int type = handler->flags; |
b3b94faa DT |
593 | int error; |
594 | ||
3767ac21 | 595 | if (!ip->i_eattr) |
b3b94faa | 596 | return -ENODATA; |
40b78a32 SW |
597 | if (strlen(name) > GFS2_EA_MAX_NAME_LEN) |
598 | return -EINVAL; | |
b3b94faa | 599 | |
40b78a32 | 600 | error = gfs2_ea_find(ip, type, name, &el); |
b3b94faa DT |
601 | if (error) |
602 | return error; | |
603 | if (!el.el_ea) | |
604 | return -ENODATA; | |
86d00636 | 605 | if (size) |
40b78a32 SW |
606 | error = gfs2_ea_get_copy(ip, &el, buffer, size); |
607 | else | |
b3b94faa | 608 | error = GFS2_EA_DATA_LEN(el.el_ea); |
b3b94faa DT |
609 | brelse(el.el_bh); |
610 | ||
611 | return error; | |
612 | } | |
613 | ||
b3b94faa DT |
614 | /** |
615 | * ea_alloc_blk - allocates a new block for extended attributes. | |
616 | * @ip: A pointer to the inode that's getting extended attributes | |
cca195c5 | 617 | * @bhp: Pointer to pointer to a struct buffer_head |
b3b94faa DT |
618 | * |
619 | * Returns: errno | |
620 | */ | |
621 | ||
622 | static int ea_alloc_blk(struct gfs2_inode *ip, struct buffer_head **bhp) | |
623 | { | |
feaa7bba | 624 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa | 625 | struct gfs2_ea_header *ea; |
b45e41d7 | 626 | unsigned int n = 1; |
cd915493 | 627 | u64 block; |
09010978 | 628 | int error; |
b3b94faa | 629 | |
6e87ed0f | 630 | error = gfs2_alloc_blocks(ip, &block, &n, 0, NULL); |
09010978 SW |
631 | if (error) |
632 | return error; | |
5731be53 | 633 | gfs2_trans_add_unrevoke(sdp, block, 1); |
b3b94faa | 634 | *bhp = gfs2_meta_new(ip->i_gl, block); |
350a9b0a | 635 | gfs2_trans_add_meta(ip->i_gl, *bhp); |
b3b94faa DT |
636 | gfs2_metatype_set(*bhp, GFS2_METATYPE_EA, GFS2_FORMAT_EA); |
637 | gfs2_buffer_clear_tail(*bhp, sizeof(struct gfs2_meta_header)); | |
638 | ||
639 | ea = GFS2_EA_BH2FIRST(*bhp); | |
640 | ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize); | |
641 | ea->ea_type = GFS2_EATYPE_UNUSED; | |
642 | ea->ea_flags = GFS2_EAFLAG_LAST; | |
643 | ea->ea_num_ptrs = 0; | |
644 | ||
77658aad | 645 | gfs2_add_inode_blocks(&ip->i_inode, 1); |
b3b94faa DT |
646 | |
647 | return 0; | |
648 | } | |
649 | ||
650 | /** | |
651 | * ea_write - writes the request info to an ea, creating new blocks if | |
652 | * necessary | |
cca195c5 SW |
653 | * @ip: inode that is being modified |
654 | * @ea: the location of the new ea in a block | |
b3b94faa DT |
655 | * @er: the write request |
656 | * | |
657 | * Note: does not update ea_rec_len or the GFS2_EAFLAG_LAST bin of ea_flags | |
658 | * | |
659 | * returns : errno | |
660 | */ | |
661 | ||
662 | static int ea_write(struct gfs2_inode *ip, struct gfs2_ea_header *ea, | |
663 | struct gfs2_ea_request *er) | |
664 | { | |
feaa7bba | 665 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
09010978 | 666 | int error; |
b3b94faa DT |
667 | |
668 | ea->ea_data_len = cpu_to_be32(er->er_data_len); | |
669 | ea->ea_name_len = er->er_name_len; | |
670 | ea->ea_type = er->er_type; | |
671 | ea->__pad = 0; | |
672 | ||
673 | memcpy(GFS2_EA2NAME(ea), er->er_name, er->er_name_len); | |
674 | ||
675 | if (GFS2_EAREQ_SIZE_STUFFED(er) <= sdp->sd_jbsize) { | |
676 | ea->ea_num_ptrs = 0; | |
677 | memcpy(GFS2_EA2DATA(ea), er->er_data, er->er_data_len); | |
678 | } else { | |
b44b84d7 | 679 | __be64 *dataptr = GFS2_EA2DATAPTRS(ea); |
b3b94faa DT |
680 | const char *data = er->er_data; |
681 | unsigned int data_len = er->er_data_len; | |
682 | unsigned int copy; | |
683 | unsigned int x; | |
684 | ||
5c676f6d | 685 | ea->ea_num_ptrs = DIV_ROUND_UP(er->er_data_len, sdp->sd_jbsize); |
b3b94faa DT |
686 | for (x = 0; x < ea->ea_num_ptrs; x++) { |
687 | struct buffer_head *bh; | |
cd915493 | 688 | u64 block; |
b3b94faa | 689 | int mh_size = sizeof(struct gfs2_meta_header); |
b45e41d7 | 690 | unsigned int n = 1; |
b3b94faa | 691 | |
6e87ed0f | 692 | error = gfs2_alloc_blocks(ip, &block, &n, 0, NULL); |
09010978 SW |
693 | if (error) |
694 | return error; | |
5731be53 | 695 | gfs2_trans_add_unrevoke(sdp, block, 1); |
b3b94faa | 696 | bh = gfs2_meta_new(ip->i_gl, block); |
350a9b0a | 697 | gfs2_trans_add_meta(ip->i_gl, bh); |
b3b94faa DT |
698 | gfs2_metatype_set(bh, GFS2_METATYPE_ED, GFS2_FORMAT_ED); |
699 | ||
77658aad | 700 | gfs2_add_inode_blocks(&ip->i_inode, 1); |
b3b94faa | 701 | |
cca195c5 SW |
702 | copy = data_len > sdp->sd_jbsize ? sdp->sd_jbsize : |
703 | data_len; | |
b3b94faa DT |
704 | memcpy(bh->b_data + mh_size, data, copy); |
705 | if (copy < sdp->sd_jbsize) | |
706 | memset(bh->b_data + mh_size + copy, 0, | |
707 | sdp->sd_jbsize - copy); | |
708 | ||
cca195c5 | 709 | *dataptr++ = cpu_to_be64(bh->b_blocknr); |
b3b94faa DT |
710 | data += copy; |
711 | data_len -= copy; | |
712 | ||
713 | brelse(bh); | |
714 | } | |
715 | ||
716 | gfs2_assert_withdraw(sdp, !data_len); | |
717 | } | |
718 | ||
719 | return 0; | |
720 | } | |
721 | ||
722 | typedef int (*ea_skeleton_call_t) (struct gfs2_inode *ip, | |
cca195c5 | 723 | struct gfs2_ea_request *er, void *private); |
b3b94faa DT |
724 | |
725 | static int ea_alloc_skeleton(struct gfs2_inode *ip, struct gfs2_ea_request *er, | |
726 | unsigned int blks, | |
cca195c5 | 727 | ea_skeleton_call_t skeleton_call, void *private) |
b3b94faa | 728 | { |
7b9cff46 | 729 | struct gfs2_alloc_parms ap = { .target = blks }; |
b3b94faa DT |
730 | struct buffer_head *dibh; |
731 | int error; | |
732 | ||
8e2e0047 BP |
733 | error = gfs2_rindex_update(GFS2_SB(&ip->i_inode)); |
734 | if (error) | |
735 | return error; | |
736 | ||
b8fbf471 | 737 | error = gfs2_quota_lock_check(ip, &ap); |
b3b94faa | 738 | if (error) |
5407e242 | 739 | return error; |
b3b94faa | 740 | |
7b9cff46 | 741 | error = gfs2_inplace_reserve(ip, &ap); |
b3b94faa DT |
742 | if (error) |
743 | goto out_gunlock_q; | |
744 | ||
feaa7bba | 745 | error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), |
71f890f7 | 746 | blks + gfs2_rg_blocks(ip, blks) + |
b3b94faa DT |
747 | RES_DINODE + RES_STATFS + RES_QUOTA, 0); |
748 | if (error) | |
749 | goto out_ipres; | |
750 | ||
751 | error = skeleton_call(ip, er, private); | |
752 | if (error) | |
753 | goto out_end_trans; | |
754 | ||
755 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
756 | if (!error) { | |
4bd91ba1 | 757 | ip->i_inode.i_ctime = CURRENT_TIME; |
350a9b0a | 758 | gfs2_trans_add_meta(ip->i_gl, dibh); |
539e5d6b | 759 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa DT |
760 | brelse(dibh); |
761 | } | |
762 | ||
a91ea69f | 763 | out_end_trans: |
feaa7bba | 764 | gfs2_trans_end(GFS2_SB(&ip->i_inode)); |
a91ea69f | 765 | out_ipres: |
b3b94faa | 766 | gfs2_inplace_release(ip); |
a91ea69f | 767 | out_gunlock_q: |
b3b94faa | 768 | gfs2_quota_unlock(ip); |
b3b94faa DT |
769 | return error; |
770 | } | |
771 | ||
772 | static int ea_init_i(struct gfs2_inode *ip, struct gfs2_ea_request *er, | |
773 | void *private) | |
774 | { | |
775 | struct buffer_head *bh; | |
776 | int error; | |
777 | ||
778 | error = ea_alloc_blk(ip, &bh); | |
779 | if (error) | |
780 | return error; | |
781 | ||
3767ac21 | 782 | ip->i_eattr = bh->b_blocknr; |
b3b94faa DT |
783 | error = ea_write(ip, GFS2_EA_BH2FIRST(bh), er); |
784 | ||
785 | brelse(bh); | |
786 | ||
787 | return error; | |
788 | } | |
789 | ||
790 | /** | |
791 | * ea_init - initializes a new eattr block | |
792 | * @ip: | |
793 | * @er: | |
794 | * | |
795 | * Returns: errno | |
796 | */ | |
797 | ||
40b78a32 SW |
798 | static int ea_init(struct gfs2_inode *ip, int type, const char *name, |
799 | const void *data, size_t size) | |
b3b94faa | 800 | { |
40b78a32 | 801 | struct gfs2_ea_request er; |
feaa7bba | 802 | unsigned int jbsize = GFS2_SB(&ip->i_inode)->sd_jbsize; |
b3b94faa DT |
803 | unsigned int blks = 1; |
804 | ||
40b78a32 SW |
805 | er.er_type = type; |
806 | er.er_name = name; | |
807 | er.er_name_len = strlen(name); | |
808 | er.er_data = (void *)data; | |
809 | er.er_data_len = size; | |
810 | ||
811 | if (GFS2_EAREQ_SIZE_STUFFED(&er) > jbsize) | |
812 | blks += DIV_ROUND_UP(er.er_data_len, jbsize); | |
b3b94faa | 813 | |
40b78a32 | 814 | return ea_alloc_skeleton(ip, &er, blks, ea_init_i, NULL); |
b3b94faa DT |
815 | } |
816 | ||
817 | static struct gfs2_ea_header *ea_split_ea(struct gfs2_ea_header *ea) | |
818 | { | |
cd915493 | 819 | u32 ea_size = GFS2_EA_SIZE(ea); |
568f4c96 SW |
820 | struct gfs2_ea_header *new = (struct gfs2_ea_header *)((char *)ea + |
821 | ea_size); | |
cd915493 | 822 | u32 new_size = GFS2_EA_REC_LEN(ea) - ea_size; |
b3b94faa DT |
823 | int last = ea->ea_flags & GFS2_EAFLAG_LAST; |
824 | ||
825 | ea->ea_rec_len = cpu_to_be32(ea_size); | |
826 | ea->ea_flags ^= last; | |
827 | ||
828 | new->ea_rec_len = cpu_to_be32(new_size); | |
829 | new->ea_flags = last; | |
830 | ||
831 | return new; | |
832 | } | |
833 | ||
834 | static void ea_set_remove_stuffed(struct gfs2_inode *ip, | |
835 | struct gfs2_ea_location *el) | |
836 | { | |
837 | struct gfs2_ea_header *ea = el->el_ea; | |
838 | struct gfs2_ea_header *prev = el->el_prev; | |
cd915493 | 839 | u32 len; |
b3b94faa | 840 | |
350a9b0a | 841 | gfs2_trans_add_meta(ip->i_gl, el->el_bh); |
b3b94faa DT |
842 | |
843 | if (!prev || !GFS2_EA_IS_STUFFED(ea)) { | |
844 | ea->ea_type = GFS2_EATYPE_UNUSED; | |
845 | return; | |
846 | } else if (GFS2_EA2NEXT(prev) != ea) { | |
847 | prev = GFS2_EA2NEXT(prev); | |
feaa7bba | 848 | gfs2_assert_withdraw(GFS2_SB(&ip->i_inode), GFS2_EA2NEXT(prev) == ea); |
b3b94faa DT |
849 | } |
850 | ||
851 | len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea); | |
852 | prev->ea_rec_len = cpu_to_be32(len); | |
853 | ||
854 | if (GFS2_EA_IS_LAST(ea)) | |
855 | prev->ea_flags |= GFS2_EAFLAG_LAST; | |
856 | } | |
857 | ||
858 | struct ea_set { | |
859 | int ea_split; | |
860 | ||
861 | struct gfs2_ea_request *es_er; | |
862 | struct gfs2_ea_location *es_el; | |
863 | ||
864 | struct buffer_head *es_bh; | |
865 | struct gfs2_ea_header *es_ea; | |
866 | }; | |
867 | ||
868 | static int ea_set_simple_noalloc(struct gfs2_inode *ip, struct buffer_head *bh, | |
869 | struct gfs2_ea_header *ea, struct ea_set *es) | |
870 | { | |
871 | struct gfs2_ea_request *er = es->es_er; | |
872 | struct buffer_head *dibh; | |
873 | int error; | |
874 | ||
feaa7bba | 875 | error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + 2 * RES_EATTR, 0); |
b3b94faa DT |
876 | if (error) |
877 | return error; | |
878 | ||
350a9b0a | 879 | gfs2_trans_add_meta(ip->i_gl, bh); |
b3b94faa DT |
880 | |
881 | if (es->ea_split) | |
882 | ea = ea_split_ea(ea); | |
883 | ||
884 | ea_write(ip, ea, er); | |
885 | ||
886 | if (es->es_el) | |
887 | ea_set_remove_stuffed(ip, es->es_el); | |
888 | ||
889 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
890 | if (error) | |
891 | goto out; | |
4bd91ba1 | 892 | ip->i_inode.i_ctime = CURRENT_TIME; |
350a9b0a | 893 | gfs2_trans_add_meta(ip->i_gl, dibh); |
539e5d6b | 894 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa | 895 | brelse(dibh); |
a91ea69f | 896 | out: |
feaa7bba | 897 | gfs2_trans_end(GFS2_SB(&ip->i_inode)); |
b3b94faa DT |
898 | return error; |
899 | } | |
900 | ||
901 | static int ea_set_simple_alloc(struct gfs2_inode *ip, | |
902 | struct gfs2_ea_request *er, void *private) | |
903 | { | |
904 | struct ea_set *es = private; | |
905 | struct gfs2_ea_header *ea = es->es_ea; | |
906 | int error; | |
907 | ||
350a9b0a | 908 | gfs2_trans_add_meta(ip->i_gl, es->es_bh); |
b3b94faa DT |
909 | |
910 | if (es->ea_split) | |
911 | ea = ea_split_ea(ea); | |
912 | ||
913 | error = ea_write(ip, ea, er); | |
914 | if (error) | |
915 | return error; | |
916 | ||
917 | if (es->es_el) | |
918 | ea_set_remove_stuffed(ip, es->es_el); | |
919 | ||
920 | return 0; | |
921 | } | |
922 | ||
923 | static int ea_set_simple(struct gfs2_inode *ip, struct buffer_head *bh, | |
924 | struct gfs2_ea_header *ea, struct gfs2_ea_header *prev, | |
925 | void *private) | |
926 | { | |
927 | struct ea_set *es = private; | |
928 | unsigned int size; | |
929 | int stuffed; | |
930 | int error; | |
931 | ||
40b78a32 SW |
932 | stuffed = ea_calc_size(GFS2_SB(&ip->i_inode), es->es_er->er_name_len, |
933 | es->es_er->er_data_len, &size); | |
b3b94faa DT |
934 | |
935 | if (ea->ea_type == GFS2_EATYPE_UNUSED) { | |
936 | if (GFS2_EA_REC_LEN(ea) < size) | |
937 | return 0; | |
938 | if (!GFS2_EA_IS_STUFFED(ea)) { | |
939 | error = ea_remove_unstuffed(ip, bh, ea, prev, 1); | |
940 | if (error) | |
941 | return error; | |
942 | } | |
943 | es->ea_split = 0; | |
944 | } else if (GFS2_EA_REC_LEN(ea) - GFS2_EA_SIZE(ea) >= size) | |
945 | es->ea_split = 1; | |
946 | else | |
947 | return 0; | |
948 | ||
949 | if (stuffed) { | |
950 | error = ea_set_simple_noalloc(ip, bh, ea, es); | |
951 | if (error) | |
952 | return error; | |
953 | } else { | |
954 | unsigned int blks; | |
955 | ||
956 | es->es_bh = bh; | |
957 | es->es_ea = ea; | |
5c676f6d | 958 | blks = 2 + DIV_ROUND_UP(es->es_er->er_data_len, |
feaa7bba | 959 | GFS2_SB(&ip->i_inode)->sd_jbsize); |
b3b94faa DT |
960 | |
961 | error = ea_alloc_skeleton(ip, es->es_er, blks, | |
962 | ea_set_simple_alloc, es); | |
963 | if (error) | |
964 | return error; | |
965 | } | |
966 | ||
967 | return 1; | |
968 | } | |
969 | ||
970 | static int ea_set_block(struct gfs2_inode *ip, struct gfs2_ea_request *er, | |
971 | void *private) | |
972 | { | |
feaa7bba | 973 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa | 974 | struct buffer_head *indbh, *newbh; |
b44b84d7 | 975 | __be64 *eablk; |
b3b94faa DT |
976 | int error; |
977 | int mh_size = sizeof(struct gfs2_meta_header); | |
978 | ||
383f01fb | 979 | if (ip->i_diskflags & GFS2_DIF_EA_INDIRECT) { |
b44b84d7 | 980 | __be64 *end; |
b3b94faa | 981 | |
c8d57703 | 982 | error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT, 0, |
7276b3b0 | 983 | &indbh); |
b3b94faa DT |
984 | if (error) |
985 | return error; | |
986 | ||
987 | if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) { | |
988 | error = -EIO; | |
989 | goto out; | |
990 | } | |
991 | ||
b44b84d7 | 992 | eablk = (__be64 *)(indbh->b_data + mh_size); |
b3b94faa DT |
993 | end = eablk + sdp->sd_inptrs; |
994 | ||
995 | for (; eablk < end; eablk++) | |
996 | if (!*eablk) | |
997 | break; | |
998 | ||
999 | if (eablk == end) { | |
1000 | error = -ENOSPC; | |
1001 | goto out; | |
1002 | } | |
1003 | ||
350a9b0a | 1004 | gfs2_trans_add_meta(ip->i_gl, indbh); |
b3b94faa | 1005 | } else { |
cd915493 | 1006 | u64 blk; |
b45e41d7 | 1007 | unsigned int n = 1; |
6e87ed0f | 1008 | error = gfs2_alloc_blocks(ip, &blk, &n, 0, NULL); |
09010978 SW |
1009 | if (error) |
1010 | return error; | |
5731be53 | 1011 | gfs2_trans_add_unrevoke(sdp, blk, 1); |
b3b94faa | 1012 | indbh = gfs2_meta_new(ip->i_gl, blk); |
350a9b0a | 1013 | gfs2_trans_add_meta(ip->i_gl, indbh); |
b3b94faa DT |
1014 | gfs2_metatype_set(indbh, GFS2_METATYPE_IN, GFS2_FORMAT_IN); |
1015 | gfs2_buffer_clear_tail(indbh, mh_size); | |
1016 | ||
b44b84d7 | 1017 | eablk = (__be64 *)(indbh->b_data + mh_size); |
3767ac21 SW |
1018 | *eablk = cpu_to_be64(ip->i_eattr); |
1019 | ip->i_eattr = blk; | |
383f01fb | 1020 | ip->i_diskflags |= GFS2_DIF_EA_INDIRECT; |
77658aad | 1021 | gfs2_add_inode_blocks(&ip->i_inode, 1); |
b3b94faa DT |
1022 | |
1023 | eablk++; | |
1024 | } | |
1025 | ||
1026 | error = ea_alloc_blk(ip, &newbh); | |
1027 | if (error) | |
1028 | goto out; | |
1029 | ||
cd915493 | 1030 | *eablk = cpu_to_be64((u64)newbh->b_blocknr); |
b3b94faa DT |
1031 | error = ea_write(ip, GFS2_EA_BH2FIRST(newbh), er); |
1032 | brelse(newbh); | |
1033 | if (error) | |
1034 | goto out; | |
1035 | ||
1036 | if (private) | |
cca195c5 | 1037 | ea_set_remove_stuffed(ip, private); |
b3b94faa | 1038 | |
a91ea69f | 1039 | out: |
b3b94faa | 1040 | brelse(indbh); |
b3b94faa DT |
1041 | return error; |
1042 | } | |
1043 | ||
40b78a32 SW |
1044 | static int ea_set_i(struct gfs2_inode *ip, int type, const char *name, |
1045 | const void *value, size_t size, struct gfs2_ea_location *el) | |
b3b94faa | 1046 | { |
40b78a32 | 1047 | struct gfs2_ea_request er; |
b3b94faa DT |
1048 | struct ea_set es; |
1049 | unsigned int blks = 2; | |
1050 | int error; | |
1051 | ||
40b78a32 SW |
1052 | er.er_type = type; |
1053 | er.er_name = name; | |
1054 | er.er_data = (void *)value; | |
1055 | er.er_name_len = strlen(name); | |
1056 | er.er_data_len = size; | |
1057 | ||
b3b94faa | 1058 | memset(&es, 0, sizeof(struct ea_set)); |
40b78a32 | 1059 | es.es_er = &er; |
b3b94faa DT |
1060 | es.es_el = el; |
1061 | ||
1062 | error = ea_foreach(ip, ea_set_simple, &es); | |
1063 | if (error > 0) | |
1064 | return 0; | |
1065 | if (error) | |
1066 | return error; | |
1067 | ||
383f01fb | 1068 | if (!(ip->i_diskflags & GFS2_DIF_EA_INDIRECT)) |
b3b94faa | 1069 | blks++; |
40b78a32 SW |
1070 | if (GFS2_EAREQ_SIZE_STUFFED(&er) > GFS2_SB(&ip->i_inode)->sd_jbsize) |
1071 | blks += DIV_ROUND_UP(er.er_data_len, GFS2_SB(&ip->i_inode)->sd_jbsize); | |
b3b94faa | 1072 | |
40b78a32 | 1073 | return ea_alloc_skeleton(ip, &er, blks, ea_set_block, el); |
b3b94faa DT |
1074 | } |
1075 | ||
1076 | static int ea_set_remove_unstuffed(struct gfs2_inode *ip, | |
1077 | struct gfs2_ea_location *el) | |
1078 | { | |
1079 | if (el->el_prev && GFS2_EA2NEXT(el->el_prev) != el->el_ea) { | |
1080 | el->el_prev = GFS2_EA2NEXT(el->el_prev); | |
feaa7bba | 1081 | gfs2_assert_withdraw(GFS2_SB(&ip->i_inode), |
b3b94faa DT |
1082 | GFS2_EA2NEXT(el->el_prev) == el->el_ea); |
1083 | } | |
1084 | ||
86d00636 | 1085 | return ea_remove_unstuffed(ip, el->el_bh, el->el_ea, el->el_prev, 0); |
b3b94faa DT |
1086 | } |
1087 | ||
b3b94faa DT |
1088 | static int ea_remove_stuffed(struct gfs2_inode *ip, struct gfs2_ea_location *el) |
1089 | { | |
1090 | struct gfs2_ea_header *ea = el->el_ea; | |
1091 | struct gfs2_ea_header *prev = el->el_prev; | |
1092 | struct buffer_head *dibh; | |
1093 | int error; | |
1094 | ||
feaa7bba | 1095 | error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + RES_EATTR, 0); |
b3b94faa DT |
1096 | if (error) |
1097 | return error; | |
1098 | ||
350a9b0a | 1099 | gfs2_trans_add_meta(ip->i_gl, el->el_bh); |
b3b94faa DT |
1100 | |
1101 | if (prev) { | |
cd915493 | 1102 | u32 len; |
b3b94faa DT |
1103 | |
1104 | len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea); | |
1105 | prev->ea_rec_len = cpu_to_be32(len); | |
1106 | ||
1107 | if (GFS2_EA_IS_LAST(ea)) | |
1108 | prev->ea_flags |= GFS2_EAFLAG_LAST; | |
40b78a32 | 1109 | } else { |
b3b94faa | 1110 | ea->ea_type = GFS2_EATYPE_UNUSED; |
40b78a32 | 1111 | } |
b3b94faa DT |
1112 | |
1113 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1114 | if (!error) { | |
4bd91ba1 | 1115 | ip->i_inode.i_ctime = CURRENT_TIME; |
350a9b0a | 1116 | gfs2_trans_add_meta(ip->i_gl, dibh); |
539e5d6b | 1117 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa | 1118 | brelse(dibh); |
907b9bce | 1119 | } |
b3b94faa | 1120 | |
feaa7bba | 1121 | gfs2_trans_end(GFS2_SB(&ip->i_inode)); |
b3b94faa DT |
1122 | |
1123 | return error; | |
1124 | } | |
1125 | ||
40b78a32 SW |
1126 | /** |
1127 | * gfs2_xattr_remove - Remove a GFS2 extended attribute | |
431547b3 | 1128 | * @ip: The inode |
40b78a32 SW |
1129 | * @type: The type of the extended attribute |
1130 | * @name: The name of the extended attribute | |
1131 | * | |
1132 | * This is not called directly by the VFS since we use the (common) | |
1133 | * scheme of making a "set with NULL data" mean a remove request. Note | |
1134 | * that this is different from a set with zero length data. | |
1135 | * | |
1136 | * Returns: 0, or errno on failure | |
1137 | */ | |
1138 | ||
431547b3 | 1139 | static int gfs2_xattr_remove(struct gfs2_inode *ip, int type, const char *name) |
b3b94faa DT |
1140 | { |
1141 | struct gfs2_ea_location el; | |
1142 | int error; | |
1143 | ||
3767ac21 | 1144 | if (!ip->i_eattr) |
b3b94faa DT |
1145 | return -ENODATA; |
1146 | ||
40b78a32 | 1147 | error = gfs2_ea_find(ip, type, name, &el); |
b3b94faa DT |
1148 | if (error) |
1149 | return error; | |
1150 | if (!el.el_ea) | |
1151 | return -ENODATA; | |
1152 | ||
1153 | if (GFS2_EA_IS_STUFFED(el.el_ea)) | |
1154 | error = ea_remove_stuffed(ip, &el); | |
1155 | else | |
40b78a32 | 1156 | error = ea_remove_unstuffed(ip, el.el_bh, el.el_ea, el.el_prev, 0); |
b3b94faa DT |
1157 | |
1158 | brelse(el.el_bh); | |
1159 | ||
1160 | return error; | |
1161 | } | |
1162 | ||
1163 | /** | |
431547b3 CH |
1164 | * __gfs2_xattr_set - Set (or remove) a GFS2 extended attribute |
1165 | * @ip: The inode | |
40b78a32 SW |
1166 | * @name: The name of the extended attribute |
1167 | * @value: The value of the extended attribute (NULL for remove) | |
1168 | * @size: The size of the @value argument | |
1169 | * @flags: Create or Replace | |
431547b3 | 1170 | * @type: The type of the extended attribute |
b3b94faa | 1171 | * |
40b78a32 SW |
1172 | * See gfs2_xattr_remove() for details of the removal of xattrs. |
1173 | * | |
1174 | * Returns: 0 or errno on failure | |
b3b94faa DT |
1175 | */ |
1176 | ||
431547b3 CH |
1177 | int __gfs2_xattr_set(struct inode *inode, const char *name, |
1178 | const void *value, size_t size, int flags, int type) | |
b3b94faa | 1179 | { |
40b78a32 | 1180 | struct gfs2_inode *ip = GFS2_I(inode); |
431547b3 | 1181 | struct gfs2_sbd *sdp = GFS2_SB(inode); |
40b78a32 SW |
1182 | struct gfs2_ea_location el; |
1183 | unsigned int namel = strlen(name); | |
b3b94faa DT |
1184 | int error; |
1185 | ||
40b78a32 SW |
1186 | if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) |
1187 | return -EPERM; | |
1188 | if (namel > GFS2_EA_MAX_NAME_LEN) | |
1189 | return -ERANGE; | |
b3b94faa | 1190 | |
40b78a32 | 1191 | if (value == NULL) |
431547b3 | 1192 | return gfs2_xattr_remove(ip, type, name); |
40b78a32 SW |
1193 | |
1194 | if (ea_check_size(sdp, namel, size)) | |
1195 | return -ERANGE; | |
1196 | ||
1197 | if (!ip->i_eattr) { | |
1198 | if (flags & XATTR_REPLACE) | |
1199 | return -ENODATA; | |
1200 | return ea_init(ip, type, name, value, size); | |
1201 | } | |
1202 | ||
1203 | error = gfs2_ea_find(ip, type, name, &el); | |
b3b94faa DT |
1204 | if (error) |
1205 | return error; | |
1206 | ||
40b78a32 SW |
1207 | if (el.el_ea) { |
1208 | if (ip->i_diskflags & GFS2_DIF_APPENDONLY) { | |
1209 | brelse(el.el_bh); | |
1210 | return -EPERM; | |
1211 | } | |
b3b94faa | 1212 | |
40b78a32 SW |
1213 | error = -EEXIST; |
1214 | if (!(flags & XATTR_CREATE)) { | |
1215 | int unstuffed = !GFS2_EA_IS_STUFFED(el.el_ea); | |
1216 | error = ea_set_i(ip, type, name, value, size, &el); | |
1217 | if (!error && unstuffed) | |
1218 | ea_set_remove_unstuffed(ip, &el); | |
1219 | } | |
1220 | ||
1221 | brelse(el.el_bh); | |
1222 | return error; | |
1223 | } | |
1224 | ||
1225 | error = -ENODATA; | |
1226 | if (!(flags & XATTR_REPLACE)) | |
1227 | error = ea_set_i(ip, type, name, value, size, NULL); | |
b3b94faa DT |
1228 | |
1229 | return error; | |
1230 | } | |
1231 | ||
d9a82a04 AG |
1232 | static int gfs2_xattr_set(const struct xattr_handler *handler, |
1233 | struct dentry *dentry, const char *name, | |
1234 | const void *value, size_t size, int flags) | |
431547b3 | 1235 | { |
2b0143b5 | 1236 | return __gfs2_xattr_set(d_inode(dentry), name, value, |
d9a82a04 | 1237 | size, flags, handler->flags); |
431547b3 CH |
1238 | } |
1239 | ||
b3b94faa DT |
1240 | static int ea_dealloc_indirect(struct gfs2_inode *ip) |
1241 | { | |
feaa7bba | 1242 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa DT |
1243 | struct gfs2_rgrp_list rlist; |
1244 | struct buffer_head *indbh, *dibh; | |
b44b84d7 | 1245 | __be64 *eablk, *end; |
b3b94faa | 1246 | unsigned int rg_blocks = 0; |
cd915493 | 1247 | u64 bstart = 0; |
b3b94faa DT |
1248 | unsigned int blen = 0; |
1249 | unsigned int blks = 0; | |
1250 | unsigned int x; | |
1251 | int error; | |
1252 | ||
5e2f7d61 BP |
1253 | error = gfs2_rindex_update(sdp); |
1254 | if (error) | |
1255 | return error; | |
1256 | ||
b3b94faa DT |
1257 | memset(&rlist, 0, sizeof(struct gfs2_rgrp_list)); |
1258 | ||
c8d57703 | 1259 | error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT, 0, &indbh); |
b3b94faa DT |
1260 | if (error) |
1261 | return error; | |
1262 | ||
1263 | if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) { | |
1264 | error = -EIO; | |
1265 | goto out; | |
1266 | } | |
1267 | ||
b44b84d7 | 1268 | eablk = (__be64 *)(indbh->b_data + sizeof(struct gfs2_meta_header)); |
b3b94faa DT |
1269 | end = eablk + sdp->sd_inptrs; |
1270 | ||
1271 | for (; eablk < end; eablk++) { | |
cd915493 | 1272 | u64 bn; |
b3b94faa DT |
1273 | |
1274 | if (!*eablk) | |
1275 | break; | |
1276 | bn = be64_to_cpu(*eablk); | |
1277 | ||
1278 | if (bstart + blen == bn) | |
1279 | blen++; | |
1280 | else { | |
1281 | if (bstart) | |
70b0c365 | 1282 | gfs2_rlist_add(ip, &rlist, bstart); |
b3b94faa DT |
1283 | bstart = bn; |
1284 | blen = 1; | |
1285 | } | |
1286 | blks++; | |
1287 | } | |
1288 | if (bstart) | |
70b0c365 | 1289 | gfs2_rlist_add(ip, &rlist, bstart); |
b3b94faa DT |
1290 | else |
1291 | goto out; | |
1292 | ||
fe6c991c | 1293 | gfs2_rlist_alloc(&rlist, LM_ST_EXCLUSIVE); |
b3b94faa DT |
1294 | |
1295 | for (x = 0; x < rlist.rl_rgrps; x++) { | |
1296 | struct gfs2_rgrpd *rgd; | |
5c676f6d | 1297 | rgd = rlist.rl_ghs[x].gh_gl->gl_object; |
bb8d8a6f | 1298 | rg_blocks += rgd->rd_length; |
b3b94faa DT |
1299 | } |
1300 | ||
1301 | error = gfs2_glock_nq_m(rlist.rl_rgrps, rlist.rl_ghs); | |
1302 | if (error) | |
1303 | goto out_rlist_free; | |
1304 | ||
cca195c5 SW |
1305 | error = gfs2_trans_begin(sdp, rg_blocks + RES_DINODE + RES_INDIRECT + |
1306 | RES_STATFS + RES_QUOTA, blks); | |
b3b94faa DT |
1307 | if (error) |
1308 | goto out_gunlock; | |
1309 | ||
350a9b0a | 1310 | gfs2_trans_add_meta(ip->i_gl, indbh); |
b3b94faa | 1311 | |
b44b84d7 | 1312 | eablk = (__be64 *)(indbh->b_data + sizeof(struct gfs2_meta_header)); |
b3b94faa DT |
1313 | bstart = 0; |
1314 | blen = 0; | |
1315 | ||
1316 | for (; eablk < end; eablk++) { | |
cd915493 | 1317 | u64 bn; |
b3b94faa DT |
1318 | |
1319 | if (!*eablk) | |
1320 | break; | |
1321 | bn = be64_to_cpu(*eablk); | |
1322 | ||
1323 | if (bstart + blen == bn) | |
1324 | blen++; | |
1325 | else { | |
1326 | if (bstart) | |
1327 | gfs2_free_meta(ip, bstart, blen); | |
1328 | bstart = bn; | |
1329 | blen = 1; | |
1330 | } | |
1331 | ||
1332 | *eablk = 0; | |
77658aad | 1333 | gfs2_add_inode_blocks(&ip->i_inode, -1); |
b3b94faa DT |
1334 | } |
1335 | if (bstart) | |
1336 | gfs2_free_meta(ip, bstart, blen); | |
1337 | ||
383f01fb | 1338 | ip->i_diskflags &= ~GFS2_DIF_EA_INDIRECT; |
b3b94faa DT |
1339 | |
1340 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1341 | if (!error) { | |
350a9b0a | 1342 | gfs2_trans_add_meta(ip->i_gl, dibh); |
539e5d6b | 1343 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa DT |
1344 | brelse(dibh); |
1345 | } | |
1346 | ||
1347 | gfs2_trans_end(sdp); | |
1348 | ||
a91ea69f | 1349 | out_gunlock: |
b3b94faa | 1350 | gfs2_glock_dq_m(rlist.rl_rgrps, rlist.rl_ghs); |
a91ea69f | 1351 | out_rlist_free: |
b3b94faa | 1352 | gfs2_rlist_free(&rlist); |
a91ea69f | 1353 | out: |
b3b94faa | 1354 | brelse(indbh); |
b3b94faa DT |
1355 | return error; |
1356 | } | |
1357 | ||
1358 | static int ea_dealloc_block(struct gfs2_inode *ip) | |
1359 | { | |
feaa7bba | 1360 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa DT |
1361 | struct gfs2_rgrpd *rgd; |
1362 | struct buffer_head *dibh; | |
564e12b1 | 1363 | struct gfs2_holder gh; |
b3b94faa DT |
1364 | int error; |
1365 | ||
5e2f7d61 BP |
1366 | error = gfs2_rindex_update(sdp); |
1367 | if (error) | |
1368 | return error; | |
1369 | ||
66fc061b | 1370 | rgd = gfs2_blk2rgrpd(sdp, ip->i_eattr, 1); |
b3b94faa DT |
1371 | if (!rgd) { |
1372 | gfs2_consist_inode(ip); | |
1373 | return -EIO; | |
1374 | } | |
1375 | ||
564e12b1 | 1376 | error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &gh); |
b3b94faa DT |
1377 | if (error) |
1378 | return error; | |
1379 | ||
cca195c5 SW |
1380 | error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_DINODE + RES_STATFS + |
1381 | RES_QUOTA, 1); | |
b3b94faa DT |
1382 | if (error) |
1383 | goto out_gunlock; | |
1384 | ||
3767ac21 | 1385 | gfs2_free_meta(ip, ip->i_eattr, 1); |
b3b94faa | 1386 | |
3767ac21 | 1387 | ip->i_eattr = 0; |
77658aad | 1388 | gfs2_add_inode_blocks(&ip->i_inode, -1); |
b3b94faa DT |
1389 | |
1390 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1391 | if (!error) { | |
350a9b0a | 1392 | gfs2_trans_add_meta(ip->i_gl, dibh); |
539e5d6b | 1393 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa DT |
1394 | brelse(dibh); |
1395 | } | |
1396 | ||
1397 | gfs2_trans_end(sdp); | |
1398 | ||
a91ea69f | 1399 | out_gunlock: |
564e12b1 | 1400 | gfs2_glock_dq_uninit(&gh); |
b3b94faa DT |
1401 | return error; |
1402 | } | |
1403 | ||
1404 | /** | |
1405 | * gfs2_ea_dealloc - deallocate the extended attribute fork | |
1406 | * @ip: the inode | |
1407 | * | |
1408 | * Returns: errno | |
1409 | */ | |
1410 | ||
1411 | int gfs2_ea_dealloc(struct gfs2_inode *ip) | |
1412 | { | |
b3b94faa DT |
1413 | int error; |
1414 | ||
8e2e0047 BP |
1415 | error = gfs2_rindex_update(GFS2_SB(&ip->i_inode)); |
1416 | if (error) | |
1417 | return error; | |
1418 | ||
f4108a60 | 1419 | error = gfs2_quota_hold(ip, NO_UID_QUOTA_CHANGE, NO_GID_QUOTA_CHANGE); |
b3b94faa | 1420 | if (error) |
5407e242 | 1421 | return error; |
b3b94faa | 1422 | |
b3b94faa DT |
1423 | error = ea_foreach(ip, ea_dealloc_unstuffed, NULL); |
1424 | if (error) | |
8339ee54 | 1425 | goto out_quota; |
b3b94faa | 1426 | |
383f01fb | 1427 | if (ip->i_diskflags & GFS2_DIF_EA_INDIRECT) { |
b3b94faa DT |
1428 | error = ea_dealloc_indirect(ip); |
1429 | if (error) | |
8339ee54 | 1430 | goto out_quota; |
b3b94faa DT |
1431 | } |
1432 | ||
1433 | error = ea_dealloc_block(ip); | |
1434 | ||
a91ea69f | 1435 | out_quota: |
b3b94faa | 1436 | gfs2_quota_unhold(ip); |
b3b94faa DT |
1437 | return error; |
1438 | } | |
1439 | ||
b7bb0a12 | 1440 | static const struct xattr_handler gfs2_xattr_user_handler = { |
40b78a32 | 1441 | .prefix = XATTR_USER_PREFIX, |
431547b3 CH |
1442 | .flags = GFS2_EATYPE_USR, |
1443 | .get = gfs2_xattr_get, | |
1444 | .set = gfs2_xattr_set, | |
40b78a32 SW |
1445 | }; |
1446 | ||
b7bb0a12 | 1447 | static const struct xattr_handler gfs2_xattr_security_handler = { |
40b78a32 | 1448 | .prefix = XATTR_SECURITY_PREFIX, |
431547b3 CH |
1449 | .flags = GFS2_EATYPE_SECURITY, |
1450 | .get = gfs2_xattr_get, | |
1451 | .set = gfs2_xattr_set, | |
40b78a32 SW |
1452 | }; |
1453 | ||
b7bb0a12 | 1454 | const struct xattr_handler *gfs2_xattr_handlers[] = { |
40b78a32 SW |
1455 | &gfs2_xattr_user_handler, |
1456 | &gfs2_xattr_security_handler, | |
e01580bf CH |
1457 | &posix_acl_access_xattr_handler, |
1458 | &posix_acl_default_xattr_handler, | |
40b78a32 SW |
1459 | NULL, |
1460 | }; | |
1461 |