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 | ||
3767ac21 | 122 | error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT, &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 | ||
7276b3b0 | 146 | error = gfs2_meta_read(ip->i_gl, bn, DIO_WAIT, &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++) { | |
7276b3b0 SW |
480 | error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs), 0, |
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 | */ | |
431547b3 CH |
586 | static int gfs2_xattr_get(struct dentry *dentry, const char *name, |
587 | void *buffer, size_t size, int type) | |
b3b94faa | 588 | { |
2b0143b5 | 589 | struct gfs2_inode *ip = GFS2_I(d_inode(dentry)); |
b3b94faa DT |
590 | struct gfs2_ea_location el; |
591 | int error; | |
592 | ||
3767ac21 | 593 | if (!ip->i_eattr) |
b3b94faa | 594 | return -ENODATA; |
40b78a32 SW |
595 | if (strlen(name) > GFS2_EA_MAX_NAME_LEN) |
596 | return -EINVAL; | |
b3b94faa | 597 | |
40b78a32 | 598 | error = gfs2_ea_find(ip, type, name, &el); |
b3b94faa DT |
599 | if (error) |
600 | return error; | |
601 | if (!el.el_ea) | |
602 | return -ENODATA; | |
86d00636 | 603 | if (size) |
40b78a32 SW |
604 | error = gfs2_ea_get_copy(ip, &el, buffer, size); |
605 | else | |
b3b94faa | 606 | error = GFS2_EA_DATA_LEN(el.el_ea); |
b3b94faa DT |
607 | brelse(el.el_bh); |
608 | ||
609 | return error; | |
610 | } | |
611 | ||
b3b94faa DT |
612 | /** |
613 | * ea_alloc_blk - allocates a new block for extended attributes. | |
614 | * @ip: A pointer to the inode that's getting extended attributes | |
cca195c5 | 615 | * @bhp: Pointer to pointer to a struct buffer_head |
b3b94faa DT |
616 | * |
617 | * Returns: errno | |
618 | */ | |
619 | ||
620 | static int ea_alloc_blk(struct gfs2_inode *ip, struct buffer_head **bhp) | |
621 | { | |
feaa7bba | 622 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa | 623 | struct gfs2_ea_header *ea; |
b45e41d7 | 624 | unsigned int n = 1; |
cd915493 | 625 | u64 block; |
09010978 | 626 | int error; |
b3b94faa | 627 | |
6e87ed0f | 628 | error = gfs2_alloc_blocks(ip, &block, &n, 0, NULL); |
09010978 SW |
629 | if (error) |
630 | return error; | |
5731be53 | 631 | gfs2_trans_add_unrevoke(sdp, block, 1); |
b3b94faa | 632 | *bhp = gfs2_meta_new(ip->i_gl, block); |
350a9b0a | 633 | gfs2_trans_add_meta(ip->i_gl, *bhp); |
b3b94faa DT |
634 | gfs2_metatype_set(*bhp, GFS2_METATYPE_EA, GFS2_FORMAT_EA); |
635 | gfs2_buffer_clear_tail(*bhp, sizeof(struct gfs2_meta_header)); | |
636 | ||
637 | ea = GFS2_EA_BH2FIRST(*bhp); | |
638 | ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize); | |
639 | ea->ea_type = GFS2_EATYPE_UNUSED; | |
640 | ea->ea_flags = GFS2_EAFLAG_LAST; | |
641 | ea->ea_num_ptrs = 0; | |
642 | ||
77658aad | 643 | gfs2_add_inode_blocks(&ip->i_inode, 1); |
b3b94faa DT |
644 | |
645 | return 0; | |
646 | } | |
647 | ||
648 | /** | |
649 | * ea_write - writes the request info to an ea, creating new blocks if | |
650 | * necessary | |
cca195c5 SW |
651 | * @ip: inode that is being modified |
652 | * @ea: the location of the new ea in a block | |
b3b94faa DT |
653 | * @er: the write request |
654 | * | |
655 | * Note: does not update ea_rec_len or the GFS2_EAFLAG_LAST bin of ea_flags | |
656 | * | |
657 | * returns : errno | |
658 | */ | |
659 | ||
660 | static int ea_write(struct gfs2_inode *ip, struct gfs2_ea_header *ea, | |
661 | struct gfs2_ea_request *er) | |
662 | { | |
feaa7bba | 663 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
09010978 | 664 | int error; |
b3b94faa DT |
665 | |
666 | ea->ea_data_len = cpu_to_be32(er->er_data_len); | |
667 | ea->ea_name_len = er->er_name_len; | |
668 | ea->ea_type = er->er_type; | |
669 | ea->__pad = 0; | |
670 | ||
671 | memcpy(GFS2_EA2NAME(ea), er->er_name, er->er_name_len); | |
672 | ||
673 | if (GFS2_EAREQ_SIZE_STUFFED(er) <= sdp->sd_jbsize) { | |
674 | ea->ea_num_ptrs = 0; | |
675 | memcpy(GFS2_EA2DATA(ea), er->er_data, er->er_data_len); | |
676 | } else { | |
b44b84d7 | 677 | __be64 *dataptr = GFS2_EA2DATAPTRS(ea); |
b3b94faa DT |
678 | const char *data = er->er_data; |
679 | unsigned int data_len = er->er_data_len; | |
680 | unsigned int copy; | |
681 | unsigned int x; | |
682 | ||
5c676f6d | 683 | ea->ea_num_ptrs = DIV_ROUND_UP(er->er_data_len, sdp->sd_jbsize); |
b3b94faa DT |
684 | for (x = 0; x < ea->ea_num_ptrs; x++) { |
685 | struct buffer_head *bh; | |
cd915493 | 686 | u64 block; |
b3b94faa | 687 | int mh_size = sizeof(struct gfs2_meta_header); |
b45e41d7 | 688 | unsigned int n = 1; |
b3b94faa | 689 | |
6e87ed0f | 690 | error = gfs2_alloc_blocks(ip, &block, &n, 0, NULL); |
09010978 SW |
691 | if (error) |
692 | return error; | |
5731be53 | 693 | gfs2_trans_add_unrevoke(sdp, block, 1); |
b3b94faa | 694 | bh = gfs2_meta_new(ip->i_gl, block); |
350a9b0a | 695 | gfs2_trans_add_meta(ip->i_gl, bh); |
b3b94faa DT |
696 | gfs2_metatype_set(bh, GFS2_METATYPE_ED, GFS2_FORMAT_ED); |
697 | ||
77658aad | 698 | gfs2_add_inode_blocks(&ip->i_inode, 1); |
b3b94faa | 699 | |
cca195c5 SW |
700 | copy = data_len > sdp->sd_jbsize ? sdp->sd_jbsize : |
701 | data_len; | |
b3b94faa DT |
702 | memcpy(bh->b_data + mh_size, data, copy); |
703 | if (copy < sdp->sd_jbsize) | |
704 | memset(bh->b_data + mh_size + copy, 0, | |
705 | sdp->sd_jbsize - copy); | |
706 | ||
cca195c5 | 707 | *dataptr++ = cpu_to_be64(bh->b_blocknr); |
b3b94faa DT |
708 | data += copy; |
709 | data_len -= copy; | |
710 | ||
711 | brelse(bh); | |
712 | } | |
713 | ||
714 | gfs2_assert_withdraw(sdp, !data_len); | |
715 | } | |
716 | ||
717 | return 0; | |
718 | } | |
719 | ||
720 | typedef int (*ea_skeleton_call_t) (struct gfs2_inode *ip, | |
cca195c5 | 721 | struct gfs2_ea_request *er, void *private); |
b3b94faa DT |
722 | |
723 | static int ea_alloc_skeleton(struct gfs2_inode *ip, struct gfs2_ea_request *er, | |
724 | unsigned int blks, | |
cca195c5 | 725 | ea_skeleton_call_t skeleton_call, void *private) |
b3b94faa | 726 | { |
7b9cff46 | 727 | struct gfs2_alloc_parms ap = { .target = blks }; |
b3b94faa DT |
728 | struct buffer_head *dibh; |
729 | int error; | |
730 | ||
8e2e0047 BP |
731 | error = gfs2_rindex_update(GFS2_SB(&ip->i_inode)); |
732 | if (error) | |
733 | return error; | |
734 | ||
b8fbf471 | 735 | error = gfs2_quota_lock_check(ip, &ap); |
b3b94faa | 736 | if (error) |
5407e242 | 737 | return error; |
b3b94faa | 738 | |
7b9cff46 | 739 | error = gfs2_inplace_reserve(ip, &ap); |
b3b94faa DT |
740 | if (error) |
741 | goto out_gunlock_q; | |
742 | ||
feaa7bba | 743 | error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), |
71f890f7 | 744 | blks + gfs2_rg_blocks(ip, blks) + |
b3b94faa DT |
745 | RES_DINODE + RES_STATFS + RES_QUOTA, 0); |
746 | if (error) | |
747 | goto out_ipres; | |
748 | ||
749 | error = skeleton_call(ip, er, private); | |
750 | if (error) | |
751 | goto out_end_trans; | |
752 | ||
753 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
754 | if (!error) { | |
4bd91ba1 | 755 | ip->i_inode.i_ctime = CURRENT_TIME; |
350a9b0a | 756 | gfs2_trans_add_meta(ip->i_gl, dibh); |
539e5d6b | 757 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa DT |
758 | brelse(dibh); |
759 | } | |
760 | ||
a91ea69f | 761 | out_end_trans: |
feaa7bba | 762 | gfs2_trans_end(GFS2_SB(&ip->i_inode)); |
a91ea69f | 763 | out_ipres: |
b3b94faa | 764 | gfs2_inplace_release(ip); |
a91ea69f | 765 | out_gunlock_q: |
b3b94faa | 766 | gfs2_quota_unlock(ip); |
b3b94faa DT |
767 | return error; |
768 | } | |
769 | ||
770 | static int ea_init_i(struct gfs2_inode *ip, struct gfs2_ea_request *er, | |
771 | void *private) | |
772 | { | |
773 | struct buffer_head *bh; | |
774 | int error; | |
775 | ||
776 | error = ea_alloc_blk(ip, &bh); | |
777 | if (error) | |
778 | return error; | |
779 | ||
3767ac21 | 780 | ip->i_eattr = bh->b_blocknr; |
b3b94faa DT |
781 | error = ea_write(ip, GFS2_EA_BH2FIRST(bh), er); |
782 | ||
783 | brelse(bh); | |
784 | ||
785 | return error; | |
786 | } | |
787 | ||
788 | /** | |
789 | * ea_init - initializes a new eattr block | |
790 | * @ip: | |
791 | * @er: | |
792 | * | |
793 | * Returns: errno | |
794 | */ | |
795 | ||
40b78a32 SW |
796 | static int ea_init(struct gfs2_inode *ip, int type, const char *name, |
797 | const void *data, size_t size) | |
b3b94faa | 798 | { |
40b78a32 | 799 | struct gfs2_ea_request er; |
feaa7bba | 800 | unsigned int jbsize = GFS2_SB(&ip->i_inode)->sd_jbsize; |
b3b94faa DT |
801 | unsigned int blks = 1; |
802 | ||
40b78a32 SW |
803 | er.er_type = type; |
804 | er.er_name = name; | |
805 | er.er_name_len = strlen(name); | |
806 | er.er_data = (void *)data; | |
807 | er.er_data_len = size; | |
808 | ||
809 | if (GFS2_EAREQ_SIZE_STUFFED(&er) > jbsize) | |
810 | blks += DIV_ROUND_UP(er.er_data_len, jbsize); | |
b3b94faa | 811 | |
40b78a32 | 812 | return ea_alloc_skeleton(ip, &er, blks, ea_init_i, NULL); |
b3b94faa DT |
813 | } |
814 | ||
815 | static struct gfs2_ea_header *ea_split_ea(struct gfs2_ea_header *ea) | |
816 | { | |
cd915493 | 817 | u32 ea_size = GFS2_EA_SIZE(ea); |
568f4c96 SW |
818 | struct gfs2_ea_header *new = (struct gfs2_ea_header *)((char *)ea + |
819 | ea_size); | |
cd915493 | 820 | u32 new_size = GFS2_EA_REC_LEN(ea) - ea_size; |
b3b94faa DT |
821 | int last = ea->ea_flags & GFS2_EAFLAG_LAST; |
822 | ||
823 | ea->ea_rec_len = cpu_to_be32(ea_size); | |
824 | ea->ea_flags ^= last; | |
825 | ||
826 | new->ea_rec_len = cpu_to_be32(new_size); | |
827 | new->ea_flags = last; | |
828 | ||
829 | return new; | |
830 | } | |
831 | ||
832 | static void ea_set_remove_stuffed(struct gfs2_inode *ip, | |
833 | struct gfs2_ea_location *el) | |
834 | { | |
835 | struct gfs2_ea_header *ea = el->el_ea; | |
836 | struct gfs2_ea_header *prev = el->el_prev; | |
cd915493 | 837 | u32 len; |
b3b94faa | 838 | |
350a9b0a | 839 | gfs2_trans_add_meta(ip->i_gl, el->el_bh); |
b3b94faa DT |
840 | |
841 | if (!prev || !GFS2_EA_IS_STUFFED(ea)) { | |
842 | ea->ea_type = GFS2_EATYPE_UNUSED; | |
843 | return; | |
844 | } else if (GFS2_EA2NEXT(prev) != ea) { | |
845 | prev = GFS2_EA2NEXT(prev); | |
feaa7bba | 846 | gfs2_assert_withdraw(GFS2_SB(&ip->i_inode), GFS2_EA2NEXT(prev) == ea); |
b3b94faa DT |
847 | } |
848 | ||
849 | len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea); | |
850 | prev->ea_rec_len = cpu_to_be32(len); | |
851 | ||
852 | if (GFS2_EA_IS_LAST(ea)) | |
853 | prev->ea_flags |= GFS2_EAFLAG_LAST; | |
854 | } | |
855 | ||
856 | struct ea_set { | |
857 | int ea_split; | |
858 | ||
859 | struct gfs2_ea_request *es_er; | |
860 | struct gfs2_ea_location *es_el; | |
861 | ||
862 | struct buffer_head *es_bh; | |
863 | struct gfs2_ea_header *es_ea; | |
864 | }; | |
865 | ||
866 | static int ea_set_simple_noalloc(struct gfs2_inode *ip, struct buffer_head *bh, | |
867 | struct gfs2_ea_header *ea, struct ea_set *es) | |
868 | { | |
869 | struct gfs2_ea_request *er = es->es_er; | |
870 | struct buffer_head *dibh; | |
871 | int error; | |
872 | ||
feaa7bba | 873 | error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + 2 * RES_EATTR, 0); |
b3b94faa DT |
874 | if (error) |
875 | return error; | |
876 | ||
350a9b0a | 877 | gfs2_trans_add_meta(ip->i_gl, bh); |
b3b94faa DT |
878 | |
879 | if (es->ea_split) | |
880 | ea = ea_split_ea(ea); | |
881 | ||
882 | ea_write(ip, ea, er); | |
883 | ||
884 | if (es->es_el) | |
885 | ea_set_remove_stuffed(ip, es->es_el); | |
886 | ||
887 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
888 | if (error) | |
889 | goto out; | |
4bd91ba1 | 890 | ip->i_inode.i_ctime = CURRENT_TIME; |
350a9b0a | 891 | gfs2_trans_add_meta(ip->i_gl, dibh); |
539e5d6b | 892 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa | 893 | brelse(dibh); |
a91ea69f | 894 | out: |
feaa7bba | 895 | gfs2_trans_end(GFS2_SB(&ip->i_inode)); |
b3b94faa DT |
896 | return error; |
897 | } | |
898 | ||
899 | static int ea_set_simple_alloc(struct gfs2_inode *ip, | |
900 | struct gfs2_ea_request *er, void *private) | |
901 | { | |
902 | struct ea_set *es = private; | |
903 | struct gfs2_ea_header *ea = es->es_ea; | |
904 | int error; | |
905 | ||
350a9b0a | 906 | gfs2_trans_add_meta(ip->i_gl, es->es_bh); |
b3b94faa DT |
907 | |
908 | if (es->ea_split) | |
909 | ea = ea_split_ea(ea); | |
910 | ||
911 | error = ea_write(ip, ea, er); | |
912 | if (error) | |
913 | return error; | |
914 | ||
915 | if (es->es_el) | |
916 | ea_set_remove_stuffed(ip, es->es_el); | |
917 | ||
918 | return 0; | |
919 | } | |
920 | ||
921 | static int ea_set_simple(struct gfs2_inode *ip, struct buffer_head *bh, | |
922 | struct gfs2_ea_header *ea, struct gfs2_ea_header *prev, | |
923 | void *private) | |
924 | { | |
925 | struct ea_set *es = private; | |
926 | unsigned int size; | |
927 | int stuffed; | |
928 | int error; | |
929 | ||
40b78a32 SW |
930 | stuffed = ea_calc_size(GFS2_SB(&ip->i_inode), es->es_er->er_name_len, |
931 | es->es_er->er_data_len, &size); | |
b3b94faa DT |
932 | |
933 | if (ea->ea_type == GFS2_EATYPE_UNUSED) { | |
934 | if (GFS2_EA_REC_LEN(ea) < size) | |
935 | return 0; | |
936 | if (!GFS2_EA_IS_STUFFED(ea)) { | |
937 | error = ea_remove_unstuffed(ip, bh, ea, prev, 1); | |
938 | if (error) | |
939 | return error; | |
940 | } | |
941 | es->ea_split = 0; | |
942 | } else if (GFS2_EA_REC_LEN(ea) - GFS2_EA_SIZE(ea) >= size) | |
943 | es->ea_split = 1; | |
944 | else | |
945 | return 0; | |
946 | ||
947 | if (stuffed) { | |
948 | error = ea_set_simple_noalloc(ip, bh, ea, es); | |
949 | if (error) | |
950 | return error; | |
951 | } else { | |
952 | unsigned int blks; | |
953 | ||
954 | es->es_bh = bh; | |
955 | es->es_ea = ea; | |
5c676f6d | 956 | blks = 2 + DIV_ROUND_UP(es->es_er->er_data_len, |
feaa7bba | 957 | GFS2_SB(&ip->i_inode)->sd_jbsize); |
b3b94faa DT |
958 | |
959 | error = ea_alloc_skeleton(ip, es->es_er, blks, | |
960 | ea_set_simple_alloc, es); | |
961 | if (error) | |
962 | return error; | |
963 | } | |
964 | ||
965 | return 1; | |
966 | } | |
967 | ||
968 | static int ea_set_block(struct gfs2_inode *ip, struct gfs2_ea_request *er, | |
969 | void *private) | |
970 | { | |
feaa7bba | 971 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa | 972 | struct buffer_head *indbh, *newbh; |
b44b84d7 | 973 | __be64 *eablk; |
b3b94faa DT |
974 | int error; |
975 | int mh_size = sizeof(struct gfs2_meta_header); | |
976 | ||
383f01fb | 977 | if (ip->i_diskflags & GFS2_DIF_EA_INDIRECT) { |
b44b84d7 | 978 | __be64 *end; |
b3b94faa | 979 | |
3767ac21 | 980 | error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT, |
7276b3b0 | 981 | &indbh); |
b3b94faa DT |
982 | if (error) |
983 | return error; | |
984 | ||
985 | if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) { | |
986 | error = -EIO; | |
987 | goto out; | |
988 | } | |
989 | ||
b44b84d7 | 990 | eablk = (__be64 *)(indbh->b_data + mh_size); |
b3b94faa DT |
991 | end = eablk + sdp->sd_inptrs; |
992 | ||
993 | for (; eablk < end; eablk++) | |
994 | if (!*eablk) | |
995 | break; | |
996 | ||
997 | if (eablk == end) { | |
998 | error = -ENOSPC; | |
999 | goto out; | |
1000 | } | |
1001 | ||
350a9b0a | 1002 | gfs2_trans_add_meta(ip->i_gl, indbh); |
b3b94faa | 1003 | } else { |
cd915493 | 1004 | u64 blk; |
b45e41d7 | 1005 | unsigned int n = 1; |
6e87ed0f | 1006 | error = gfs2_alloc_blocks(ip, &blk, &n, 0, NULL); |
09010978 SW |
1007 | if (error) |
1008 | return error; | |
5731be53 | 1009 | gfs2_trans_add_unrevoke(sdp, blk, 1); |
b3b94faa | 1010 | indbh = gfs2_meta_new(ip->i_gl, blk); |
350a9b0a | 1011 | gfs2_trans_add_meta(ip->i_gl, indbh); |
b3b94faa DT |
1012 | gfs2_metatype_set(indbh, GFS2_METATYPE_IN, GFS2_FORMAT_IN); |
1013 | gfs2_buffer_clear_tail(indbh, mh_size); | |
1014 | ||
b44b84d7 | 1015 | eablk = (__be64 *)(indbh->b_data + mh_size); |
3767ac21 SW |
1016 | *eablk = cpu_to_be64(ip->i_eattr); |
1017 | ip->i_eattr = blk; | |
383f01fb | 1018 | ip->i_diskflags |= GFS2_DIF_EA_INDIRECT; |
77658aad | 1019 | gfs2_add_inode_blocks(&ip->i_inode, 1); |
b3b94faa DT |
1020 | |
1021 | eablk++; | |
1022 | } | |
1023 | ||
1024 | error = ea_alloc_blk(ip, &newbh); | |
1025 | if (error) | |
1026 | goto out; | |
1027 | ||
cd915493 | 1028 | *eablk = cpu_to_be64((u64)newbh->b_blocknr); |
b3b94faa DT |
1029 | error = ea_write(ip, GFS2_EA_BH2FIRST(newbh), er); |
1030 | brelse(newbh); | |
1031 | if (error) | |
1032 | goto out; | |
1033 | ||
1034 | if (private) | |
cca195c5 | 1035 | ea_set_remove_stuffed(ip, private); |
b3b94faa | 1036 | |
a91ea69f | 1037 | out: |
b3b94faa | 1038 | brelse(indbh); |
b3b94faa DT |
1039 | return error; |
1040 | } | |
1041 | ||
40b78a32 SW |
1042 | static int ea_set_i(struct gfs2_inode *ip, int type, const char *name, |
1043 | const void *value, size_t size, struct gfs2_ea_location *el) | |
b3b94faa | 1044 | { |
40b78a32 | 1045 | struct gfs2_ea_request er; |
b3b94faa DT |
1046 | struct ea_set es; |
1047 | unsigned int blks = 2; | |
1048 | int error; | |
1049 | ||
40b78a32 SW |
1050 | er.er_type = type; |
1051 | er.er_name = name; | |
1052 | er.er_data = (void *)value; | |
1053 | er.er_name_len = strlen(name); | |
1054 | er.er_data_len = size; | |
1055 | ||
b3b94faa | 1056 | memset(&es, 0, sizeof(struct ea_set)); |
40b78a32 | 1057 | es.es_er = &er; |
b3b94faa DT |
1058 | es.es_el = el; |
1059 | ||
1060 | error = ea_foreach(ip, ea_set_simple, &es); | |
1061 | if (error > 0) | |
1062 | return 0; | |
1063 | if (error) | |
1064 | return error; | |
1065 | ||
383f01fb | 1066 | if (!(ip->i_diskflags & GFS2_DIF_EA_INDIRECT)) |
b3b94faa | 1067 | blks++; |
40b78a32 SW |
1068 | if (GFS2_EAREQ_SIZE_STUFFED(&er) > GFS2_SB(&ip->i_inode)->sd_jbsize) |
1069 | blks += DIV_ROUND_UP(er.er_data_len, GFS2_SB(&ip->i_inode)->sd_jbsize); | |
b3b94faa | 1070 | |
40b78a32 | 1071 | return ea_alloc_skeleton(ip, &er, blks, ea_set_block, el); |
b3b94faa DT |
1072 | } |
1073 | ||
1074 | static int ea_set_remove_unstuffed(struct gfs2_inode *ip, | |
1075 | struct gfs2_ea_location *el) | |
1076 | { | |
1077 | if (el->el_prev && GFS2_EA2NEXT(el->el_prev) != el->el_ea) { | |
1078 | el->el_prev = GFS2_EA2NEXT(el->el_prev); | |
feaa7bba | 1079 | gfs2_assert_withdraw(GFS2_SB(&ip->i_inode), |
b3b94faa DT |
1080 | GFS2_EA2NEXT(el->el_prev) == el->el_ea); |
1081 | } | |
1082 | ||
86d00636 | 1083 | return ea_remove_unstuffed(ip, el->el_bh, el->el_ea, el->el_prev, 0); |
b3b94faa DT |
1084 | } |
1085 | ||
b3b94faa DT |
1086 | static int ea_remove_stuffed(struct gfs2_inode *ip, struct gfs2_ea_location *el) |
1087 | { | |
1088 | struct gfs2_ea_header *ea = el->el_ea; | |
1089 | struct gfs2_ea_header *prev = el->el_prev; | |
1090 | struct buffer_head *dibh; | |
1091 | int error; | |
1092 | ||
feaa7bba | 1093 | error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + RES_EATTR, 0); |
b3b94faa DT |
1094 | if (error) |
1095 | return error; | |
1096 | ||
350a9b0a | 1097 | gfs2_trans_add_meta(ip->i_gl, el->el_bh); |
b3b94faa DT |
1098 | |
1099 | if (prev) { | |
cd915493 | 1100 | u32 len; |
b3b94faa DT |
1101 | |
1102 | len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea); | |
1103 | prev->ea_rec_len = cpu_to_be32(len); | |
1104 | ||
1105 | if (GFS2_EA_IS_LAST(ea)) | |
1106 | prev->ea_flags |= GFS2_EAFLAG_LAST; | |
40b78a32 | 1107 | } else { |
b3b94faa | 1108 | ea->ea_type = GFS2_EATYPE_UNUSED; |
40b78a32 | 1109 | } |
b3b94faa DT |
1110 | |
1111 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1112 | if (!error) { | |
4bd91ba1 | 1113 | ip->i_inode.i_ctime = CURRENT_TIME; |
350a9b0a | 1114 | gfs2_trans_add_meta(ip->i_gl, dibh); |
539e5d6b | 1115 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa | 1116 | brelse(dibh); |
907b9bce | 1117 | } |
b3b94faa | 1118 | |
feaa7bba | 1119 | gfs2_trans_end(GFS2_SB(&ip->i_inode)); |
b3b94faa DT |
1120 | |
1121 | return error; | |
1122 | } | |
1123 | ||
40b78a32 SW |
1124 | /** |
1125 | * gfs2_xattr_remove - Remove a GFS2 extended attribute | |
431547b3 | 1126 | * @ip: The inode |
40b78a32 SW |
1127 | * @type: The type of the extended attribute |
1128 | * @name: The name of the extended attribute | |
1129 | * | |
1130 | * This is not called directly by the VFS since we use the (common) | |
1131 | * scheme of making a "set with NULL data" mean a remove request. Note | |
1132 | * that this is different from a set with zero length data. | |
1133 | * | |
1134 | * Returns: 0, or errno on failure | |
1135 | */ | |
1136 | ||
431547b3 | 1137 | static int gfs2_xattr_remove(struct gfs2_inode *ip, int type, const char *name) |
b3b94faa DT |
1138 | { |
1139 | struct gfs2_ea_location el; | |
1140 | int error; | |
1141 | ||
3767ac21 | 1142 | if (!ip->i_eattr) |
b3b94faa DT |
1143 | return -ENODATA; |
1144 | ||
40b78a32 | 1145 | error = gfs2_ea_find(ip, type, name, &el); |
b3b94faa DT |
1146 | if (error) |
1147 | return error; | |
1148 | if (!el.el_ea) | |
1149 | return -ENODATA; | |
1150 | ||
1151 | if (GFS2_EA_IS_STUFFED(el.el_ea)) | |
1152 | error = ea_remove_stuffed(ip, &el); | |
1153 | else | |
40b78a32 | 1154 | error = ea_remove_unstuffed(ip, el.el_bh, el.el_ea, el.el_prev, 0); |
b3b94faa DT |
1155 | |
1156 | brelse(el.el_bh); | |
1157 | ||
1158 | return error; | |
1159 | } | |
1160 | ||
1161 | /** | |
431547b3 CH |
1162 | * __gfs2_xattr_set - Set (or remove) a GFS2 extended attribute |
1163 | * @ip: The inode | |
40b78a32 SW |
1164 | * @name: The name of the extended attribute |
1165 | * @value: The value of the extended attribute (NULL for remove) | |
1166 | * @size: The size of the @value argument | |
1167 | * @flags: Create or Replace | |
431547b3 | 1168 | * @type: The type of the extended attribute |
b3b94faa | 1169 | * |
40b78a32 SW |
1170 | * See gfs2_xattr_remove() for details of the removal of xattrs. |
1171 | * | |
1172 | * Returns: 0 or errno on failure | |
b3b94faa DT |
1173 | */ |
1174 | ||
431547b3 CH |
1175 | int __gfs2_xattr_set(struct inode *inode, const char *name, |
1176 | const void *value, size_t size, int flags, int type) | |
b3b94faa | 1177 | { |
40b78a32 | 1178 | struct gfs2_inode *ip = GFS2_I(inode); |
431547b3 | 1179 | struct gfs2_sbd *sdp = GFS2_SB(inode); |
40b78a32 SW |
1180 | struct gfs2_ea_location el; |
1181 | unsigned int namel = strlen(name); | |
b3b94faa DT |
1182 | int error; |
1183 | ||
40b78a32 SW |
1184 | if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) |
1185 | return -EPERM; | |
1186 | if (namel > GFS2_EA_MAX_NAME_LEN) | |
1187 | return -ERANGE; | |
b3b94faa | 1188 | |
40b78a32 | 1189 | if (value == NULL) |
431547b3 | 1190 | return gfs2_xattr_remove(ip, type, name); |
40b78a32 SW |
1191 | |
1192 | if (ea_check_size(sdp, namel, size)) | |
1193 | return -ERANGE; | |
1194 | ||
1195 | if (!ip->i_eattr) { | |
1196 | if (flags & XATTR_REPLACE) | |
1197 | return -ENODATA; | |
1198 | return ea_init(ip, type, name, value, size); | |
1199 | } | |
1200 | ||
1201 | error = gfs2_ea_find(ip, type, name, &el); | |
b3b94faa DT |
1202 | if (error) |
1203 | return error; | |
1204 | ||
40b78a32 SW |
1205 | if (el.el_ea) { |
1206 | if (ip->i_diskflags & GFS2_DIF_APPENDONLY) { | |
1207 | brelse(el.el_bh); | |
1208 | return -EPERM; | |
1209 | } | |
b3b94faa | 1210 | |
40b78a32 SW |
1211 | error = -EEXIST; |
1212 | if (!(flags & XATTR_CREATE)) { | |
1213 | int unstuffed = !GFS2_EA_IS_STUFFED(el.el_ea); | |
1214 | error = ea_set_i(ip, type, name, value, size, &el); | |
1215 | if (!error && unstuffed) | |
1216 | ea_set_remove_unstuffed(ip, &el); | |
1217 | } | |
1218 | ||
1219 | brelse(el.el_bh); | |
1220 | return error; | |
1221 | } | |
1222 | ||
1223 | error = -ENODATA; | |
1224 | if (!(flags & XATTR_REPLACE)) | |
1225 | error = ea_set_i(ip, type, name, value, size, NULL); | |
b3b94faa DT |
1226 | |
1227 | return error; | |
1228 | } | |
1229 | ||
431547b3 CH |
1230 | static int gfs2_xattr_set(struct dentry *dentry, const char *name, |
1231 | const void *value, size_t size, int flags, int type) | |
1232 | { | |
2b0143b5 | 1233 | return __gfs2_xattr_set(d_inode(dentry), name, value, |
431547b3 CH |
1234 | size, flags, type); |
1235 | } | |
1236 | ||
1f981697 | 1237 | |
b3b94faa DT |
1238 | static int ea_acl_chmod_unstuffed(struct gfs2_inode *ip, |
1239 | struct gfs2_ea_header *ea, char *data) | |
1240 | { | |
feaa7bba | 1241 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa | 1242 | unsigned int amount = GFS2_EA_DATA_LEN(ea); |
5c676f6d | 1243 | unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize); |
1f981697 | 1244 | int ret; |
b3b94faa | 1245 | |
1f981697 SW |
1246 | ret = gfs2_trans_begin(sdp, nptrs + RES_DINODE, 0); |
1247 | if (ret) | |
1248 | return ret; | |
b3b94faa | 1249 | |
1f981697 | 1250 | ret = gfs2_iter_unstuffed(ip, ea, data, NULL); |
b3b94faa | 1251 | gfs2_trans_end(sdp); |
1f981697 SW |
1252 | |
1253 | return ret; | |
b3b94faa DT |
1254 | } |
1255 | ||
479c427d | 1256 | int gfs2_xattr_acl_chmod(struct gfs2_inode *ip, struct iattr *attr, char *data) |
b3b94faa | 1257 | { |
ab9bbda0 SW |
1258 | struct inode *inode = &ip->i_inode; |
1259 | struct gfs2_sbd *sdp = GFS2_SB(inode); | |
479c427d | 1260 | struct gfs2_ea_location el; |
b3b94faa DT |
1261 | int error; |
1262 | ||
479c427d SW |
1263 | error = gfs2_ea_find(ip, GFS2_EATYPE_SYS, GFS2_POSIX_ACL_ACCESS, &el); |
1264 | if (error) | |
1265 | return error; | |
1266 | ||
1267 | if (GFS2_EA_IS_STUFFED(el.el_ea)) { | |
e412bdb1 SW |
1268 | error = gfs2_trans_begin(sdp, RES_DINODE + RES_EATTR, 0); |
1269 | if (error == 0) { | |
350a9b0a | 1270 | gfs2_trans_add_meta(ip->i_gl, el.el_bh); |
e412bdb1 SW |
1271 | memcpy(GFS2_EA2DATA(el.el_ea), data, |
1272 | GFS2_EA_DATA_LEN(el.el_ea)); | |
1273 | } | |
1274 | } else { | |
479c427d | 1275 | error = ea_acl_chmod_unstuffed(ip, el.el_ea, data); |
e412bdb1 | 1276 | } |
b3b94faa | 1277 | |
e412bdb1 | 1278 | brelse(el.el_bh); |
b3b94faa DT |
1279 | if (error) |
1280 | return error; | |
1281 | ||
ab9bbda0 | 1282 | error = gfs2_setattr_simple(inode, attr); |
e412bdb1 | 1283 | gfs2_trans_end(sdp); |
b3b94faa DT |
1284 | return error; |
1285 | } | |
1286 | ||
1287 | static int ea_dealloc_indirect(struct gfs2_inode *ip) | |
1288 | { | |
feaa7bba | 1289 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa DT |
1290 | struct gfs2_rgrp_list rlist; |
1291 | struct buffer_head *indbh, *dibh; | |
b44b84d7 | 1292 | __be64 *eablk, *end; |
b3b94faa | 1293 | unsigned int rg_blocks = 0; |
cd915493 | 1294 | u64 bstart = 0; |
b3b94faa DT |
1295 | unsigned int blen = 0; |
1296 | unsigned int blks = 0; | |
1297 | unsigned int x; | |
1298 | int error; | |
1299 | ||
5e2f7d61 BP |
1300 | error = gfs2_rindex_update(sdp); |
1301 | if (error) | |
1302 | return error; | |
1303 | ||
b3b94faa DT |
1304 | memset(&rlist, 0, sizeof(struct gfs2_rgrp_list)); |
1305 | ||
3767ac21 | 1306 | error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT, &indbh); |
b3b94faa DT |
1307 | if (error) |
1308 | return error; | |
1309 | ||
1310 | if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) { | |
1311 | error = -EIO; | |
1312 | goto out; | |
1313 | } | |
1314 | ||
b44b84d7 | 1315 | eablk = (__be64 *)(indbh->b_data + sizeof(struct gfs2_meta_header)); |
b3b94faa DT |
1316 | end = eablk + sdp->sd_inptrs; |
1317 | ||
1318 | for (; eablk < end; eablk++) { | |
cd915493 | 1319 | u64 bn; |
b3b94faa DT |
1320 | |
1321 | if (!*eablk) | |
1322 | break; | |
1323 | bn = be64_to_cpu(*eablk); | |
1324 | ||
1325 | if (bstart + blen == bn) | |
1326 | blen++; | |
1327 | else { | |
1328 | if (bstart) | |
70b0c365 | 1329 | gfs2_rlist_add(ip, &rlist, bstart); |
b3b94faa DT |
1330 | bstart = bn; |
1331 | blen = 1; | |
1332 | } | |
1333 | blks++; | |
1334 | } | |
1335 | if (bstart) | |
70b0c365 | 1336 | gfs2_rlist_add(ip, &rlist, bstart); |
b3b94faa DT |
1337 | else |
1338 | goto out; | |
1339 | ||
fe6c991c | 1340 | gfs2_rlist_alloc(&rlist, LM_ST_EXCLUSIVE); |
b3b94faa DT |
1341 | |
1342 | for (x = 0; x < rlist.rl_rgrps; x++) { | |
1343 | struct gfs2_rgrpd *rgd; | |
5c676f6d | 1344 | rgd = rlist.rl_ghs[x].gh_gl->gl_object; |
bb8d8a6f | 1345 | rg_blocks += rgd->rd_length; |
b3b94faa DT |
1346 | } |
1347 | ||
1348 | error = gfs2_glock_nq_m(rlist.rl_rgrps, rlist.rl_ghs); | |
1349 | if (error) | |
1350 | goto out_rlist_free; | |
1351 | ||
cca195c5 SW |
1352 | error = gfs2_trans_begin(sdp, rg_blocks + RES_DINODE + RES_INDIRECT + |
1353 | RES_STATFS + RES_QUOTA, blks); | |
b3b94faa DT |
1354 | if (error) |
1355 | goto out_gunlock; | |
1356 | ||
350a9b0a | 1357 | gfs2_trans_add_meta(ip->i_gl, indbh); |
b3b94faa | 1358 | |
b44b84d7 | 1359 | eablk = (__be64 *)(indbh->b_data + sizeof(struct gfs2_meta_header)); |
b3b94faa DT |
1360 | bstart = 0; |
1361 | blen = 0; | |
1362 | ||
1363 | for (; eablk < end; eablk++) { | |
cd915493 | 1364 | u64 bn; |
b3b94faa DT |
1365 | |
1366 | if (!*eablk) | |
1367 | break; | |
1368 | bn = be64_to_cpu(*eablk); | |
1369 | ||
1370 | if (bstart + blen == bn) | |
1371 | blen++; | |
1372 | else { | |
1373 | if (bstart) | |
1374 | gfs2_free_meta(ip, bstart, blen); | |
1375 | bstart = bn; | |
1376 | blen = 1; | |
1377 | } | |
1378 | ||
1379 | *eablk = 0; | |
77658aad | 1380 | gfs2_add_inode_blocks(&ip->i_inode, -1); |
b3b94faa DT |
1381 | } |
1382 | if (bstart) | |
1383 | gfs2_free_meta(ip, bstart, blen); | |
1384 | ||
383f01fb | 1385 | ip->i_diskflags &= ~GFS2_DIF_EA_INDIRECT; |
b3b94faa DT |
1386 | |
1387 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1388 | if (!error) { | |
350a9b0a | 1389 | gfs2_trans_add_meta(ip->i_gl, dibh); |
539e5d6b | 1390 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa DT |
1391 | brelse(dibh); |
1392 | } | |
1393 | ||
1394 | gfs2_trans_end(sdp); | |
1395 | ||
a91ea69f | 1396 | out_gunlock: |
b3b94faa | 1397 | gfs2_glock_dq_m(rlist.rl_rgrps, rlist.rl_ghs); |
a91ea69f | 1398 | out_rlist_free: |
b3b94faa | 1399 | gfs2_rlist_free(&rlist); |
a91ea69f | 1400 | out: |
b3b94faa | 1401 | brelse(indbh); |
b3b94faa DT |
1402 | return error; |
1403 | } | |
1404 | ||
1405 | static int ea_dealloc_block(struct gfs2_inode *ip) | |
1406 | { | |
feaa7bba | 1407 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa DT |
1408 | struct gfs2_rgrpd *rgd; |
1409 | struct buffer_head *dibh; | |
564e12b1 | 1410 | struct gfs2_holder gh; |
b3b94faa DT |
1411 | int error; |
1412 | ||
5e2f7d61 BP |
1413 | error = gfs2_rindex_update(sdp); |
1414 | if (error) | |
1415 | return error; | |
1416 | ||
66fc061b | 1417 | rgd = gfs2_blk2rgrpd(sdp, ip->i_eattr, 1); |
b3b94faa DT |
1418 | if (!rgd) { |
1419 | gfs2_consist_inode(ip); | |
1420 | return -EIO; | |
1421 | } | |
1422 | ||
564e12b1 | 1423 | error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &gh); |
b3b94faa DT |
1424 | if (error) |
1425 | return error; | |
1426 | ||
cca195c5 SW |
1427 | error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_DINODE + RES_STATFS + |
1428 | RES_QUOTA, 1); | |
b3b94faa DT |
1429 | if (error) |
1430 | goto out_gunlock; | |
1431 | ||
3767ac21 | 1432 | gfs2_free_meta(ip, ip->i_eattr, 1); |
b3b94faa | 1433 | |
3767ac21 | 1434 | ip->i_eattr = 0; |
77658aad | 1435 | gfs2_add_inode_blocks(&ip->i_inode, -1); |
b3b94faa DT |
1436 | |
1437 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1438 | if (!error) { | |
350a9b0a | 1439 | gfs2_trans_add_meta(ip->i_gl, dibh); |
539e5d6b | 1440 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa DT |
1441 | brelse(dibh); |
1442 | } | |
1443 | ||
1444 | gfs2_trans_end(sdp); | |
1445 | ||
a91ea69f | 1446 | out_gunlock: |
564e12b1 | 1447 | gfs2_glock_dq_uninit(&gh); |
b3b94faa DT |
1448 | return error; |
1449 | } | |
1450 | ||
1451 | /** | |
1452 | * gfs2_ea_dealloc - deallocate the extended attribute fork | |
1453 | * @ip: the inode | |
1454 | * | |
1455 | * Returns: errno | |
1456 | */ | |
1457 | ||
1458 | int gfs2_ea_dealloc(struct gfs2_inode *ip) | |
1459 | { | |
b3b94faa DT |
1460 | int error; |
1461 | ||
8e2e0047 BP |
1462 | error = gfs2_rindex_update(GFS2_SB(&ip->i_inode)); |
1463 | if (error) | |
1464 | return error; | |
1465 | ||
f4108a60 | 1466 | error = gfs2_quota_hold(ip, NO_UID_QUOTA_CHANGE, NO_GID_QUOTA_CHANGE); |
b3b94faa | 1467 | if (error) |
5407e242 | 1468 | return error; |
b3b94faa | 1469 | |
b3b94faa DT |
1470 | error = ea_foreach(ip, ea_dealloc_unstuffed, NULL); |
1471 | if (error) | |
8339ee54 | 1472 | goto out_quota; |
b3b94faa | 1473 | |
383f01fb | 1474 | if (ip->i_diskflags & GFS2_DIF_EA_INDIRECT) { |
b3b94faa DT |
1475 | error = ea_dealloc_indirect(ip); |
1476 | if (error) | |
8339ee54 | 1477 | goto out_quota; |
b3b94faa DT |
1478 | } |
1479 | ||
1480 | error = ea_dealloc_block(ip); | |
1481 | ||
a91ea69f | 1482 | out_quota: |
b3b94faa | 1483 | gfs2_quota_unhold(ip); |
b3b94faa DT |
1484 | return error; |
1485 | } | |
1486 | ||
b7bb0a12 | 1487 | static const struct xattr_handler gfs2_xattr_user_handler = { |
40b78a32 | 1488 | .prefix = XATTR_USER_PREFIX, |
431547b3 CH |
1489 | .flags = GFS2_EATYPE_USR, |
1490 | .get = gfs2_xattr_get, | |
1491 | .set = gfs2_xattr_set, | |
40b78a32 SW |
1492 | }; |
1493 | ||
b7bb0a12 | 1494 | static const struct xattr_handler gfs2_xattr_security_handler = { |
40b78a32 | 1495 | .prefix = XATTR_SECURITY_PREFIX, |
431547b3 CH |
1496 | .flags = GFS2_EATYPE_SECURITY, |
1497 | .get = gfs2_xattr_get, | |
1498 | .set = gfs2_xattr_set, | |
40b78a32 SW |
1499 | }; |
1500 | ||
b7bb0a12 | 1501 | const struct xattr_handler *gfs2_xattr_handlers[] = { |
40b78a32 SW |
1502 | &gfs2_xattr_user_handler, |
1503 | &gfs2_xattr_security_handler, | |
e01580bf CH |
1504 | &posix_acl_access_xattr_handler, |
1505 | &posix_acl_default_xattr_handler, | |
40b78a32 SW |
1506 | NULL, |
1507 | }; | |
1508 |