]>
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 | */ | |
1a39ba99 AV |
586 | static int __gfs2_xattr_get(struct inode *inode, const char *name, |
587 | void *buffer, size_t size, int type) | |
b3b94faa | 588 | { |
b296821a | 589 | struct gfs2_inode *ip = GFS2_I(inode); |
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 | ||
1a39ba99 AV |
612 | static int gfs2_xattr_get(const struct xattr_handler *handler, |
613 | struct dentry *unused, struct inode *inode, | |
614 | const char *name, void *buffer, size_t size) | |
615 | { | |
616 | struct gfs2_inode *ip = GFS2_I(inode); | |
617 | struct gfs2_holder gh; | |
618 | bool need_unlock = false; | |
619 | int ret; | |
620 | ||
621 | /* During lookup, SELinux calls this function with the glock locked. */ | |
622 | ||
623 | if (!gfs2_glock_is_locked_by_me(ip->i_gl)) { | |
624 | ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); | |
625 | if (ret) | |
626 | return ret; | |
627 | need_unlock = true; | |
628 | } | |
629 | ret = __gfs2_xattr_get(inode, name, buffer, size, handler->flags); | |
630 | if (need_unlock) | |
631 | gfs2_glock_dq_uninit(&gh); | |
632 | return ret; | |
633 | } | |
634 | ||
b3b94faa DT |
635 | /** |
636 | * ea_alloc_blk - allocates a new block for extended attributes. | |
637 | * @ip: A pointer to the inode that's getting extended attributes | |
cca195c5 | 638 | * @bhp: Pointer to pointer to a struct buffer_head |
b3b94faa DT |
639 | * |
640 | * Returns: errno | |
641 | */ | |
642 | ||
643 | static int ea_alloc_blk(struct gfs2_inode *ip, struct buffer_head **bhp) | |
644 | { | |
feaa7bba | 645 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa | 646 | struct gfs2_ea_header *ea; |
b45e41d7 | 647 | unsigned int n = 1; |
cd915493 | 648 | u64 block; |
09010978 | 649 | int error; |
b3b94faa | 650 | |
6e87ed0f | 651 | error = gfs2_alloc_blocks(ip, &block, &n, 0, NULL); |
09010978 SW |
652 | if (error) |
653 | return error; | |
5731be53 | 654 | gfs2_trans_add_unrevoke(sdp, block, 1); |
b3b94faa | 655 | *bhp = gfs2_meta_new(ip->i_gl, block); |
350a9b0a | 656 | gfs2_trans_add_meta(ip->i_gl, *bhp); |
b3b94faa DT |
657 | gfs2_metatype_set(*bhp, GFS2_METATYPE_EA, GFS2_FORMAT_EA); |
658 | gfs2_buffer_clear_tail(*bhp, sizeof(struct gfs2_meta_header)); | |
659 | ||
660 | ea = GFS2_EA_BH2FIRST(*bhp); | |
661 | ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize); | |
662 | ea->ea_type = GFS2_EATYPE_UNUSED; | |
663 | ea->ea_flags = GFS2_EAFLAG_LAST; | |
664 | ea->ea_num_ptrs = 0; | |
665 | ||
77658aad | 666 | gfs2_add_inode_blocks(&ip->i_inode, 1); |
b3b94faa DT |
667 | |
668 | return 0; | |
669 | } | |
670 | ||
671 | /** | |
672 | * ea_write - writes the request info to an ea, creating new blocks if | |
673 | * necessary | |
cca195c5 SW |
674 | * @ip: inode that is being modified |
675 | * @ea: the location of the new ea in a block | |
b3b94faa DT |
676 | * @er: the write request |
677 | * | |
678 | * Note: does not update ea_rec_len or the GFS2_EAFLAG_LAST bin of ea_flags | |
679 | * | |
680 | * returns : errno | |
681 | */ | |
682 | ||
683 | static int ea_write(struct gfs2_inode *ip, struct gfs2_ea_header *ea, | |
684 | struct gfs2_ea_request *er) | |
685 | { | |
feaa7bba | 686 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
09010978 | 687 | int error; |
b3b94faa DT |
688 | |
689 | ea->ea_data_len = cpu_to_be32(er->er_data_len); | |
690 | ea->ea_name_len = er->er_name_len; | |
691 | ea->ea_type = er->er_type; | |
692 | ea->__pad = 0; | |
693 | ||
694 | memcpy(GFS2_EA2NAME(ea), er->er_name, er->er_name_len); | |
695 | ||
696 | if (GFS2_EAREQ_SIZE_STUFFED(er) <= sdp->sd_jbsize) { | |
697 | ea->ea_num_ptrs = 0; | |
698 | memcpy(GFS2_EA2DATA(ea), er->er_data, er->er_data_len); | |
699 | } else { | |
b44b84d7 | 700 | __be64 *dataptr = GFS2_EA2DATAPTRS(ea); |
b3b94faa DT |
701 | const char *data = er->er_data; |
702 | unsigned int data_len = er->er_data_len; | |
703 | unsigned int copy; | |
704 | unsigned int x; | |
705 | ||
5c676f6d | 706 | ea->ea_num_ptrs = DIV_ROUND_UP(er->er_data_len, sdp->sd_jbsize); |
b3b94faa DT |
707 | for (x = 0; x < ea->ea_num_ptrs; x++) { |
708 | struct buffer_head *bh; | |
cd915493 | 709 | u64 block; |
b3b94faa | 710 | int mh_size = sizeof(struct gfs2_meta_header); |
b45e41d7 | 711 | unsigned int n = 1; |
b3b94faa | 712 | |
6e87ed0f | 713 | error = gfs2_alloc_blocks(ip, &block, &n, 0, NULL); |
09010978 SW |
714 | if (error) |
715 | return error; | |
5731be53 | 716 | gfs2_trans_add_unrevoke(sdp, block, 1); |
b3b94faa | 717 | bh = gfs2_meta_new(ip->i_gl, block); |
350a9b0a | 718 | gfs2_trans_add_meta(ip->i_gl, bh); |
b3b94faa DT |
719 | gfs2_metatype_set(bh, GFS2_METATYPE_ED, GFS2_FORMAT_ED); |
720 | ||
77658aad | 721 | gfs2_add_inode_blocks(&ip->i_inode, 1); |
b3b94faa | 722 | |
cca195c5 SW |
723 | copy = data_len > sdp->sd_jbsize ? sdp->sd_jbsize : |
724 | data_len; | |
b3b94faa DT |
725 | memcpy(bh->b_data + mh_size, data, copy); |
726 | if (copy < sdp->sd_jbsize) | |
727 | memset(bh->b_data + mh_size + copy, 0, | |
728 | sdp->sd_jbsize - copy); | |
729 | ||
cca195c5 | 730 | *dataptr++ = cpu_to_be64(bh->b_blocknr); |
b3b94faa DT |
731 | data += copy; |
732 | data_len -= copy; | |
733 | ||
734 | brelse(bh); | |
735 | } | |
736 | ||
737 | gfs2_assert_withdraw(sdp, !data_len); | |
738 | } | |
739 | ||
740 | return 0; | |
741 | } | |
742 | ||
743 | typedef int (*ea_skeleton_call_t) (struct gfs2_inode *ip, | |
cca195c5 | 744 | struct gfs2_ea_request *er, void *private); |
b3b94faa DT |
745 | |
746 | static int ea_alloc_skeleton(struct gfs2_inode *ip, struct gfs2_ea_request *er, | |
747 | unsigned int blks, | |
cca195c5 | 748 | ea_skeleton_call_t skeleton_call, void *private) |
b3b94faa | 749 | { |
7b9cff46 | 750 | struct gfs2_alloc_parms ap = { .target = blks }; |
b3b94faa DT |
751 | struct buffer_head *dibh; |
752 | int error; | |
753 | ||
8e2e0047 BP |
754 | error = gfs2_rindex_update(GFS2_SB(&ip->i_inode)); |
755 | if (error) | |
756 | return error; | |
757 | ||
b8fbf471 | 758 | error = gfs2_quota_lock_check(ip, &ap); |
b3b94faa | 759 | if (error) |
5407e242 | 760 | return error; |
b3b94faa | 761 | |
7b9cff46 | 762 | error = gfs2_inplace_reserve(ip, &ap); |
b3b94faa DT |
763 | if (error) |
764 | goto out_gunlock_q; | |
765 | ||
feaa7bba | 766 | error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), |
71f890f7 | 767 | blks + gfs2_rg_blocks(ip, blks) + |
b3b94faa DT |
768 | RES_DINODE + RES_STATFS + RES_QUOTA, 0); |
769 | if (error) | |
770 | goto out_ipres; | |
771 | ||
772 | error = skeleton_call(ip, er, private); | |
773 | if (error) | |
774 | goto out_end_trans; | |
775 | ||
776 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
777 | if (!error) { | |
4bd91ba1 | 778 | ip->i_inode.i_ctime = CURRENT_TIME; |
350a9b0a | 779 | gfs2_trans_add_meta(ip->i_gl, dibh); |
539e5d6b | 780 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa DT |
781 | brelse(dibh); |
782 | } | |
783 | ||
a91ea69f | 784 | out_end_trans: |
feaa7bba | 785 | gfs2_trans_end(GFS2_SB(&ip->i_inode)); |
a91ea69f | 786 | out_ipres: |
b3b94faa | 787 | gfs2_inplace_release(ip); |
a91ea69f | 788 | out_gunlock_q: |
b3b94faa | 789 | gfs2_quota_unlock(ip); |
b3b94faa DT |
790 | return error; |
791 | } | |
792 | ||
793 | static int ea_init_i(struct gfs2_inode *ip, struct gfs2_ea_request *er, | |
794 | void *private) | |
795 | { | |
796 | struct buffer_head *bh; | |
797 | int error; | |
798 | ||
799 | error = ea_alloc_blk(ip, &bh); | |
800 | if (error) | |
801 | return error; | |
802 | ||
3767ac21 | 803 | ip->i_eattr = bh->b_blocknr; |
b3b94faa DT |
804 | error = ea_write(ip, GFS2_EA_BH2FIRST(bh), er); |
805 | ||
806 | brelse(bh); | |
807 | ||
808 | return error; | |
809 | } | |
810 | ||
811 | /** | |
812 | * ea_init - initializes a new eattr block | |
813 | * @ip: | |
814 | * @er: | |
815 | * | |
816 | * Returns: errno | |
817 | */ | |
818 | ||
40b78a32 SW |
819 | static int ea_init(struct gfs2_inode *ip, int type, const char *name, |
820 | const void *data, size_t size) | |
b3b94faa | 821 | { |
40b78a32 | 822 | struct gfs2_ea_request er; |
feaa7bba | 823 | unsigned int jbsize = GFS2_SB(&ip->i_inode)->sd_jbsize; |
b3b94faa DT |
824 | unsigned int blks = 1; |
825 | ||
40b78a32 SW |
826 | er.er_type = type; |
827 | er.er_name = name; | |
828 | er.er_name_len = strlen(name); | |
829 | er.er_data = (void *)data; | |
830 | er.er_data_len = size; | |
831 | ||
832 | if (GFS2_EAREQ_SIZE_STUFFED(&er) > jbsize) | |
833 | blks += DIV_ROUND_UP(er.er_data_len, jbsize); | |
b3b94faa | 834 | |
40b78a32 | 835 | return ea_alloc_skeleton(ip, &er, blks, ea_init_i, NULL); |
b3b94faa DT |
836 | } |
837 | ||
838 | static struct gfs2_ea_header *ea_split_ea(struct gfs2_ea_header *ea) | |
839 | { | |
cd915493 | 840 | u32 ea_size = GFS2_EA_SIZE(ea); |
568f4c96 SW |
841 | struct gfs2_ea_header *new = (struct gfs2_ea_header *)((char *)ea + |
842 | ea_size); | |
cd915493 | 843 | u32 new_size = GFS2_EA_REC_LEN(ea) - ea_size; |
b3b94faa DT |
844 | int last = ea->ea_flags & GFS2_EAFLAG_LAST; |
845 | ||
846 | ea->ea_rec_len = cpu_to_be32(ea_size); | |
847 | ea->ea_flags ^= last; | |
848 | ||
849 | new->ea_rec_len = cpu_to_be32(new_size); | |
850 | new->ea_flags = last; | |
851 | ||
852 | return new; | |
853 | } | |
854 | ||
855 | static void ea_set_remove_stuffed(struct gfs2_inode *ip, | |
856 | struct gfs2_ea_location *el) | |
857 | { | |
858 | struct gfs2_ea_header *ea = el->el_ea; | |
859 | struct gfs2_ea_header *prev = el->el_prev; | |
cd915493 | 860 | u32 len; |
b3b94faa | 861 | |
350a9b0a | 862 | gfs2_trans_add_meta(ip->i_gl, el->el_bh); |
b3b94faa DT |
863 | |
864 | if (!prev || !GFS2_EA_IS_STUFFED(ea)) { | |
865 | ea->ea_type = GFS2_EATYPE_UNUSED; | |
866 | return; | |
867 | } else if (GFS2_EA2NEXT(prev) != ea) { | |
868 | prev = GFS2_EA2NEXT(prev); | |
feaa7bba | 869 | gfs2_assert_withdraw(GFS2_SB(&ip->i_inode), GFS2_EA2NEXT(prev) == ea); |
b3b94faa DT |
870 | } |
871 | ||
872 | len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea); | |
873 | prev->ea_rec_len = cpu_to_be32(len); | |
874 | ||
875 | if (GFS2_EA_IS_LAST(ea)) | |
876 | prev->ea_flags |= GFS2_EAFLAG_LAST; | |
877 | } | |
878 | ||
879 | struct ea_set { | |
880 | int ea_split; | |
881 | ||
882 | struct gfs2_ea_request *es_er; | |
883 | struct gfs2_ea_location *es_el; | |
884 | ||
885 | struct buffer_head *es_bh; | |
886 | struct gfs2_ea_header *es_ea; | |
887 | }; | |
888 | ||
889 | static int ea_set_simple_noalloc(struct gfs2_inode *ip, struct buffer_head *bh, | |
890 | struct gfs2_ea_header *ea, struct ea_set *es) | |
891 | { | |
892 | struct gfs2_ea_request *er = es->es_er; | |
893 | struct buffer_head *dibh; | |
894 | int error; | |
895 | ||
feaa7bba | 896 | error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + 2 * RES_EATTR, 0); |
b3b94faa DT |
897 | if (error) |
898 | return error; | |
899 | ||
350a9b0a | 900 | gfs2_trans_add_meta(ip->i_gl, bh); |
b3b94faa DT |
901 | |
902 | if (es->ea_split) | |
903 | ea = ea_split_ea(ea); | |
904 | ||
905 | ea_write(ip, ea, er); | |
906 | ||
907 | if (es->es_el) | |
908 | ea_set_remove_stuffed(ip, es->es_el); | |
909 | ||
910 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
911 | if (error) | |
912 | goto out; | |
4bd91ba1 | 913 | ip->i_inode.i_ctime = CURRENT_TIME; |
350a9b0a | 914 | gfs2_trans_add_meta(ip->i_gl, dibh); |
539e5d6b | 915 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa | 916 | brelse(dibh); |
a91ea69f | 917 | out: |
feaa7bba | 918 | gfs2_trans_end(GFS2_SB(&ip->i_inode)); |
b3b94faa DT |
919 | return error; |
920 | } | |
921 | ||
922 | static int ea_set_simple_alloc(struct gfs2_inode *ip, | |
923 | struct gfs2_ea_request *er, void *private) | |
924 | { | |
925 | struct ea_set *es = private; | |
926 | struct gfs2_ea_header *ea = es->es_ea; | |
927 | int error; | |
928 | ||
350a9b0a | 929 | gfs2_trans_add_meta(ip->i_gl, es->es_bh); |
b3b94faa DT |
930 | |
931 | if (es->ea_split) | |
932 | ea = ea_split_ea(ea); | |
933 | ||
934 | error = ea_write(ip, ea, er); | |
935 | if (error) | |
936 | return error; | |
937 | ||
938 | if (es->es_el) | |
939 | ea_set_remove_stuffed(ip, es->es_el); | |
940 | ||
941 | return 0; | |
942 | } | |
943 | ||
944 | static int ea_set_simple(struct gfs2_inode *ip, struct buffer_head *bh, | |
945 | struct gfs2_ea_header *ea, struct gfs2_ea_header *prev, | |
946 | void *private) | |
947 | { | |
948 | struct ea_set *es = private; | |
949 | unsigned int size; | |
950 | int stuffed; | |
951 | int error; | |
952 | ||
40b78a32 SW |
953 | stuffed = ea_calc_size(GFS2_SB(&ip->i_inode), es->es_er->er_name_len, |
954 | es->es_er->er_data_len, &size); | |
b3b94faa DT |
955 | |
956 | if (ea->ea_type == GFS2_EATYPE_UNUSED) { | |
957 | if (GFS2_EA_REC_LEN(ea) < size) | |
958 | return 0; | |
959 | if (!GFS2_EA_IS_STUFFED(ea)) { | |
960 | error = ea_remove_unstuffed(ip, bh, ea, prev, 1); | |
961 | if (error) | |
962 | return error; | |
963 | } | |
964 | es->ea_split = 0; | |
965 | } else if (GFS2_EA_REC_LEN(ea) - GFS2_EA_SIZE(ea) >= size) | |
966 | es->ea_split = 1; | |
967 | else | |
968 | return 0; | |
969 | ||
970 | if (stuffed) { | |
971 | error = ea_set_simple_noalloc(ip, bh, ea, es); | |
972 | if (error) | |
973 | return error; | |
974 | } else { | |
975 | unsigned int blks; | |
976 | ||
977 | es->es_bh = bh; | |
978 | es->es_ea = ea; | |
5c676f6d | 979 | blks = 2 + DIV_ROUND_UP(es->es_er->er_data_len, |
feaa7bba | 980 | GFS2_SB(&ip->i_inode)->sd_jbsize); |
b3b94faa DT |
981 | |
982 | error = ea_alloc_skeleton(ip, es->es_er, blks, | |
983 | ea_set_simple_alloc, es); | |
984 | if (error) | |
985 | return error; | |
986 | } | |
987 | ||
988 | return 1; | |
989 | } | |
990 | ||
991 | static int ea_set_block(struct gfs2_inode *ip, struct gfs2_ea_request *er, | |
992 | void *private) | |
993 | { | |
feaa7bba | 994 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa | 995 | struct buffer_head *indbh, *newbh; |
b44b84d7 | 996 | __be64 *eablk; |
b3b94faa DT |
997 | int error; |
998 | int mh_size = sizeof(struct gfs2_meta_header); | |
999 | ||
383f01fb | 1000 | if (ip->i_diskflags & GFS2_DIF_EA_INDIRECT) { |
b44b84d7 | 1001 | __be64 *end; |
b3b94faa | 1002 | |
c8d57703 | 1003 | error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT, 0, |
7276b3b0 | 1004 | &indbh); |
b3b94faa DT |
1005 | if (error) |
1006 | return error; | |
1007 | ||
1008 | if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) { | |
1009 | error = -EIO; | |
1010 | goto out; | |
1011 | } | |
1012 | ||
b44b84d7 | 1013 | eablk = (__be64 *)(indbh->b_data + mh_size); |
b3b94faa DT |
1014 | end = eablk + sdp->sd_inptrs; |
1015 | ||
1016 | for (; eablk < end; eablk++) | |
1017 | if (!*eablk) | |
1018 | break; | |
1019 | ||
1020 | if (eablk == end) { | |
1021 | error = -ENOSPC; | |
1022 | goto out; | |
1023 | } | |
1024 | ||
350a9b0a | 1025 | gfs2_trans_add_meta(ip->i_gl, indbh); |
b3b94faa | 1026 | } else { |
cd915493 | 1027 | u64 blk; |
b45e41d7 | 1028 | unsigned int n = 1; |
6e87ed0f | 1029 | error = gfs2_alloc_blocks(ip, &blk, &n, 0, NULL); |
09010978 SW |
1030 | if (error) |
1031 | return error; | |
5731be53 | 1032 | gfs2_trans_add_unrevoke(sdp, blk, 1); |
b3b94faa | 1033 | indbh = gfs2_meta_new(ip->i_gl, blk); |
350a9b0a | 1034 | gfs2_trans_add_meta(ip->i_gl, indbh); |
b3b94faa DT |
1035 | gfs2_metatype_set(indbh, GFS2_METATYPE_IN, GFS2_FORMAT_IN); |
1036 | gfs2_buffer_clear_tail(indbh, mh_size); | |
1037 | ||
b44b84d7 | 1038 | eablk = (__be64 *)(indbh->b_data + mh_size); |
3767ac21 SW |
1039 | *eablk = cpu_to_be64(ip->i_eattr); |
1040 | ip->i_eattr = blk; | |
383f01fb | 1041 | ip->i_diskflags |= GFS2_DIF_EA_INDIRECT; |
77658aad | 1042 | gfs2_add_inode_blocks(&ip->i_inode, 1); |
b3b94faa DT |
1043 | |
1044 | eablk++; | |
1045 | } | |
1046 | ||
1047 | error = ea_alloc_blk(ip, &newbh); | |
1048 | if (error) | |
1049 | goto out; | |
1050 | ||
cd915493 | 1051 | *eablk = cpu_to_be64((u64)newbh->b_blocknr); |
b3b94faa DT |
1052 | error = ea_write(ip, GFS2_EA_BH2FIRST(newbh), er); |
1053 | brelse(newbh); | |
1054 | if (error) | |
1055 | goto out; | |
1056 | ||
1057 | if (private) | |
cca195c5 | 1058 | ea_set_remove_stuffed(ip, private); |
b3b94faa | 1059 | |
a91ea69f | 1060 | out: |
b3b94faa | 1061 | brelse(indbh); |
b3b94faa DT |
1062 | return error; |
1063 | } | |
1064 | ||
40b78a32 SW |
1065 | static int ea_set_i(struct gfs2_inode *ip, int type, const char *name, |
1066 | const void *value, size_t size, struct gfs2_ea_location *el) | |
b3b94faa | 1067 | { |
40b78a32 | 1068 | struct gfs2_ea_request er; |
b3b94faa DT |
1069 | struct ea_set es; |
1070 | unsigned int blks = 2; | |
1071 | int error; | |
1072 | ||
40b78a32 SW |
1073 | er.er_type = type; |
1074 | er.er_name = name; | |
1075 | er.er_data = (void *)value; | |
1076 | er.er_name_len = strlen(name); | |
1077 | er.er_data_len = size; | |
1078 | ||
b3b94faa | 1079 | memset(&es, 0, sizeof(struct ea_set)); |
40b78a32 | 1080 | es.es_er = &er; |
b3b94faa DT |
1081 | es.es_el = el; |
1082 | ||
1083 | error = ea_foreach(ip, ea_set_simple, &es); | |
1084 | if (error > 0) | |
1085 | return 0; | |
1086 | if (error) | |
1087 | return error; | |
1088 | ||
383f01fb | 1089 | if (!(ip->i_diskflags & GFS2_DIF_EA_INDIRECT)) |
b3b94faa | 1090 | blks++; |
40b78a32 SW |
1091 | if (GFS2_EAREQ_SIZE_STUFFED(&er) > GFS2_SB(&ip->i_inode)->sd_jbsize) |
1092 | blks += DIV_ROUND_UP(er.er_data_len, GFS2_SB(&ip->i_inode)->sd_jbsize); | |
b3b94faa | 1093 | |
40b78a32 | 1094 | return ea_alloc_skeleton(ip, &er, blks, ea_set_block, el); |
b3b94faa DT |
1095 | } |
1096 | ||
1097 | static int ea_set_remove_unstuffed(struct gfs2_inode *ip, | |
1098 | struct gfs2_ea_location *el) | |
1099 | { | |
1100 | if (el->el_prev && GFS2_EA2NEXT(el->el_prev) != el->el_ea) { | |
1101 | el->el_prev = GFS2_EA2NEXT(el->el_prev); | |
feaa7bba | 1102 | gfs2_assert_withdraw(GFS2_SB(&ip->i_inode), |
b3b94faa DT |
1103 | GFS2_EA2NEXT(el->el_prev) == el->el_ea); |
1104 | } | |
1105 | ||
86d00636 | 1106 | return ea_remove_unstuffed(ip, el->el_bh, el->el_ea, el->el_prev, 0); |
b3b94faa DT |
1107 | } |
1108 | ||
b3b94faa DT |
1109 | static int ea_remove_stuffed(struct gfs2_inode *ip, struct gfs2_ea_location *el) |
1110 | { | |
1111 | struct gfs2_ea_header *ea = el->el_ea; | |
1112 | struct gfs2_ea_header *prev = el->el_prev; | |
1113 | struct buffer_head *dibh; | |
1114 | int error; | |
1115 | ||
feaa7bba | 1116 | error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + RES_EATTR, 0); |
b3b94faa DT |
1117 | if (error) |
1118 | return error; | |
1119 | ||
350a9b0a | 1120 | gfs2_trans_add_meta(ip->i_gl, el->el_bh); |
b3b94faa DT |
1121 | |
1122 | if (prev) { | |
cd915493 | 1123 | u32 len; |
b3b94faa DT |
1124 | |
1125 | len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea); | |
1126 | prev->ea_rec_len = cpu_to_be32(len); | |
1127 | ||
1128 | if (GFS2_EA_IS_LAST(ea)) | |
1129 | prev->ea_flags |= GFS2_EAFLAG_LAST; | |
40b78a32 | 1130 | } else { |
b3b94faa | 1131 | ea->ea_type = GFS2_EATYPE_UNUSED; |
40b78a32 | 1132 | } |
b3b94faa DT |
1133 | |
1134 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1135 | if (!error) { | |
4bd91ba1 | 1136 | ip->i_inode.i_ctime = CURRENT_TIME; |
350a9b0a | 1137 | gfs2_trans_add_meta(ip->i_gl, dibh); |
539e5d6b | 1138 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa | 1139 | brelse(dibh); |
907b9bce | 1140 | } |
b3b94faa | 1141 | |
feaa7bba | 1142 | gfs2_trans_end(GFS2_SB(&ip->i_inode)); |
b3b94faa DT |
1143 | |
1144 | return error; | |
1145 | } | |
1146 | ||
40b78a32 SW |
1147 | /** |
1148 | * gfs2_xattr_remove - Remove a GFS2 extended attribute | |
431547b3 | 1149 | * @ip: The inode |
40b78a32 SW |
1150 | * @type: The type of the extended attribute |
1151 | * @name: The name of the extended attribute | |
1152 | * | |
1153 | * This is not called directly by the VFS since we use the (common) | |
1154 | * scheme of making a "set with NULL data" mean a remove request. Note | |
1155 | * that this is different from a set with zero length data. | |
1156 | * | |
1157 | * Returns: 0, or errno on failure | |
1158 | */ | |
1159 | ||
431547b3 | 1160 | static int gfs2_xattr_remove(struct gfs2_inode *ip, int type, const char *name) |
b3b94faa DT |
1161 | { |
1162 | struct gfs2_ea_location el; | |
1163 | int error; | |
1164 | ||
3767ac21 | 1165 | if (!ip->i_eattr) |
b3b94faa DT |
1166 | return -ENODATA; |
1167 | ||
40b78a32 | 1168 | error = gfs2_ea_find(ip, type, name, &el); |
b3b94faa DT |
1169 | if (error) |
1170 | return error; | |
1171 | if (!el.el_ea) | |
1172 | return -ENODATA; | |
1173 | ||
1174 | if (GFS2_EA_IS_STUFFED(el.el_ea)) | |
1175 | error = ea_remove_stuffed(ip, &el); | |
1176 | else | |
40b78a32 | 1177 | error = ea_remove_unstuffed(ip, el.el_bh, el.el_ea, el.el_prev, 0); |
b3b94faa DT |
1178 | |
1179 | brelse(el.el_bh); | |
1180 | ||
1181 | return error; | |
1182 | } | |
1183 | ||
1184 | /** | |
431547b3 CH |
1185 | * __gfs2_xattr_set - Set (or remove) a GFS2 extended attribute |
1186 | * @ip: The inode | |
40b78a32 SW |
1187 | * @name: The name of the extended attribute |
1188 | * @value: The value of the extended attribute (NULL for remove) | |
1189 | * @size: The size of the @value argument | |
1190 | * @flags: Create or Replace | |
431547b3 | 1191 | * @type: The type of the extended attribute |
b3b94faa | 1192 | * |
40b78a32 SW |
1193 | * See gfs2_xattr_remove() for details of the removal of xattrs. |
1194 | * | |
1195 | * Returns: 0 or errno on failure | |
b3b94faa DT |
1196 | */ |
1197 | ||
431547b3 CH |
1198 | int __gfs2_xattr_set(struct inode *inode, const char *name, |
1199 | const void *value, size_t size, int flags, int type) | |
b3b94faa | 1200 | { |
40b78a32 | 1201 | struct gfs2_inode *ip = GFS2_I(inode); |
431547b3 | 1202 | struct gfs2_sbd *sdp = GFS2_SB(inode); |
40b78a32 SW |
1203 | struct gfs2_ea_location el; |
1204 | unsigned int namel = strlen(name); | |
b3b94faa DT |
1205 | int error; |
1206 | ||
40b78a32 SW |
1207 | if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) |
1208 | return -EPERM; | |
1209 | if (namel > GFS2_EA_MAX_NAME_LEN) | |
1210 | return -ERANGE; | |
b3b94faa | 1211 | |
40b78a32 | 1212 | if (value == NULL) |
431547b3 | 1213 | return gfs2_xattr_remove(ip, type, name); |
40b78a32 SW |
1214 | |
1215 | if (ea_check_size(sdp, namel, size)) | |
1216 | return -ERANGE; | |
1217 | ||
1218 | if (!ip->i_eattr) { | |
1219 | if (flags & XATTR_REPLACE) | |
1220 | return -ENODATA; | |
1221 | return ea_init(ip, type, name, value, size); | |
1222 | } | |
1223 | ||
1224 | error = gfs2_ea_find(ip, type, name, &el); | |
b3b94faa DT |
1225 | if (error) |
1226 | return error; | |
1227 | ||
40b78a32 SW |
1228 | if (el.el_ea) { |
1229 | if (ip->i_diskflags & GFS2_DIF_APPENDONLY) { | |
1230 | brelse(el.el_bh); | |
1231 | return -EPERM; | |
1232 | } | |
b3b94faa | 1233 | |
40b78a32 SW |
1234 | error = -EEXIST; |
1235 | if (!(flags & XATTR_CREATE)) { | |
1236 | int unstuffed = !GFS2_EA_IS_STUFFED(el.el_ea); | |
1237 | error = ea_set_i(ip, type, name, value, size, &el); | |
1238 | if (!error && unstuffed) | |
1239 | ea_set_remove_unstuffed(ip, &el); | |
1240 | } | |
1241 | ||
1242 | brelse(el.el_bh); | |
1243 | return error; | |
1244 | } | |
1245 | ||
1246 | error = -ENODATA; | |
1247 | if (!(flags & XATTR_REPLACE)) | |
1248 | error = ea_set_i(ip, type, name, value, size, NULL); | |
b3b94faa DT |
1249 | |
1250 | return error; | |
1251 | } | |
1252 | ||
d9a82a04 | 1253 | static int gfs2_xattr_set(const struct xattr_handler *handler, |
59301226 AV |
1254 | struct dentry *unused, struct inode *inode, |
1255 | const char *name, const void *value, | |
1256 | size_t size, int flags) | |
431547b3 | 1257 | { |
1a39ba99 AV |
1258 | struct gfs2_inode *ip = GFS2_I(inode); |
1259 | struct gfs2_holder gh; | |
1260 | int ret; | |
1261 | ||
1262 | ret = gfs2_rsqa_alloc(ip); | |
1263 | if (ret) | |
1264 | return ret; | |
1265 | ||
1266 | ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); | |
1267 | if (ret) | |
1268 | return ret; | |
1269 | ret = __gfs2_xattr_set(inode, name, value, size, flags, handler->flags); | |
1270 | gfs2_glock_dq_uninit(&gh); | |
1271 | return ret; | |
431547b3 CH |
1272 | } |
1273 | ||
b3b94faa DT |
1274 | static int ea_dealloc_indirect(struct gfs2_inode *ip) |
1275 | { | |
feaa7bba | 1276 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa DT |
1277 | struct gfs2_rgrp_list rlist; |
1278 | struct buffer_head *indbh, *dibh; | |
b44b84d7 | 1279 | __be64 *eablk, *end; |
b3b94faa | 1280 | unsigned int rg_blocks = 0; |
cd915493 | 1281 | u64 bstart = 0; |
b3b94faa DT |
1282 | unsigned int blen = 0; |
1283 | unsigned int blks = 0; | |
1284 | unsigned int x; | |
1285 | int error; | |
1286 | ||
5e2f7d61 BP |
1287 | error = gfs2_rindex_update(sdp); |
1288 | if (error) | |
1289 | return error; | |
1290 | ||
b3b94faa DT |
1291 | memset(&rlist, 0, sizeof(struct gfs2_rgrp_list)); |
1292 | ||
c8d57703 | 1293 | error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT, 0, &indbh); |
b3b94faa DT |
1294 | if (error) |
1295 | return error; | |
1296 | ||
1297 | if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) { | |
1298 | error = -EIO; | |
1299 | goto out; | |
1300 | } | |
1301 | ||
b44b84d7 | 1302 | eablk = (__be64 *)(indbh->b_data + sizeof(struct gfs2_meta_header)); |
b3b94faa DT |
1303 | end = eablk + sdp->sd_inptrs; |
1304 | ||
1305 | for (; eablk < end; eablk++) { | |
cd915493 | 1306 | u64 bn; |
b3b94faa DT |
1307 | |
1308 | if (!*eablk) | |
1309 | break; | |
1310 | bn = be64_to_cpu(*eablk); | |
1311 | ||
1312 | if (bstart + blen == bn) | |
1313 | blen++; | |
1314 | else { | |
1315 | if (bstart) | |
70b0c365 | 1316 | gfs2_rlist_add(ip, &rlist, bstart); |
b3b94faa DT |
1317 | bstart = bn; |
1318 | blen = 1; | |
1319 | } | |
1320 | blks++; | |
1321 | } | |
1322 | if (bstart) | |
70b0c365 | 1323 | gfs2_rlist_add(ip, &rlist, bstart); |
b3b94faa DT |
1324 | else |
1325 | goto out; | |
1326 | ||
fe6c991c | 1327 | gfs2_rlist_alloc(&rlist, LM_ST_EXCLUSIVE); |
b3b94faa DT |
1328 | |
1329 | for (x = 0; x < rlist.rl_rgrps; x++) { | |
1330 | struct gfs2_rgrpd *rgd; | |
5c676f6d | 1331 | rgd = rlist.rl_ghs[x].gh_gl->gl_object; |
bb8d8a6f | 1332 | rg_blocks += rgd->rd_length; |
b3b94faa DT |
1333 | } |
1334 | ||
1335 | error = gfs2_glock_nq_m(rlist.rl_rgrps, rlist.rl_ghs); | |
1336 | if (error) | |
1337 | goto out_rlist_free; | |
1338 | ||
cca195c5 SW |
1339 | error = gfs2_trans_begin(sdp, rg_blocks + RES_DINODE + RES_INDIRECT + |
1340 | RES_STATFS + RES_QUOTA, blks); | |
b3b94faa DT |
1341 | if (error) |
1342 | goto out_gunlock; | |
1343 | ||
350a9b0a | 1344 | gfs2_trans_add_meta(ip->i_gl, indbh); |
b3b94faa | 1345 | |
b44b84d7 | 1346 | eablk = (__be64 *)(indbh->b_data + sizeof(struct gfs2_meta_header)); |
b3b94faa DT |
1347 | bstart = 0; |
1348 | blen = 0; | |
1349 | ||
1350 | for (; eablk < end; eablk++) { | |
cd915493 | 1351 | u64 bn; |
b3b94faa DT |
1352 | |
1353 | if (!*eablk) | |
1354 | break; | |
1355 | bn = be64_to_cpu(*eablk); | |
1356 | ||
1357 | if (bstart + blen == bn) | |
1358 | blen++; | |
1359 | else { | |
1360 | if (bstart) | |
1361 | gfs2_free_meta(ip, bstart, blen); | |
1362 | bstart = bn; | |
1363 | blen = 1; | |
1364 | } | |
1365 | ||
1366 | *eablk = 0; | |
77658aad | 1367 | gfs2_add_inode_blocks(&ip->i_inode, -1); |
b3b94faa DT |
1368 | } |
1369 | if (bstart) | |
1370 | gfs2_free_meta(ip, bstart, blen); | |
1371 | ||
383f01fb | 1372 | ip->i_diskflags &= ~GFS2_DIF_EA_INDIRECT; |
b3b94faa DT |
1373 | |
1374 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1375 | if (!error) { | |
350a9b0a | 1376 | gfs2_trans_add_meta(ip->i_gl, dibh); |
539e5d6b | 1377 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa DT |
1378 | brelse(dibh); |
1379 | } | |
1380 | ||
1381 | gfs2_trans_end(sdp); | |
1382 | ||
a91ea69f | 1383 | out_gunlock: |
b3b94faa | 1384 | gfs2_glock_dq_m(rlist.rl_rgrps, rlist.rl_ghs); |
a91ea69f | 1385 | out_rlist_free: |
b3b94faa | 1386 | gfs2_rlist_free(&rlist); |
a91ea69f | 1387 | out: |
b3b94faa | 1388 | brelse(indbh); |
b3b94faa DT |
1389 | return error; |
1390 | } | |
1391 | ||
1392 | static int ea_dealloc_block(struct gfs2_inode *ip) | |
1393 | { | |
feaa7bba | 1394 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa DT |
1395 | struct gfs2_rgrpd *rgd; |
1396 | struct buffer_head *dibh; | |
564e12b1 | 1397 | struct gfs2_holder gh; |
b3b94faa DT |
1398 | int error; |
1399 | ||
5e2f7d61 BP |
1400 | error = gfs2_rindex_update(sdp); |
1401 | if (error) | |
1402 | return error; | |
1403 | ||
66fc061b | 1404 | rgd = gfs2_blk2rgrpd(sdp, ip->i_eattr, 1); |
b3b94faa DT |
1405 | if (!rgd) { |
1406 | gfs2_consist_inode(ip); | |
1407 | return -EIO; | |
1408 | } | |
1409 | ||
564e12b1 | 1410 | error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &gh); |
b3b94faa DT |
1411 | if (error) |
1412 | return error; | |
1413 | ||
cca195c5 SW |
1414 | error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_DINODE + RES_STATFS + |
1415 | RES_QUOTA, 1); | |
b3b94faa DT |
1416 | if (error) |
1417 | goto out_gunlock; | |
1418 | ||
3767ac21 | 1419 | gfs2_free_meta(ip, ip->i_eattr, 1); |
b3b94faa | 1420 | |
3767ac21 | 1421 | ip->i_eattr = 0; |
77658aad | 1422 | gfs2_add_inode_blocks(&ip->i_inode, -1); |
b3b94faa DT |
1423 | |
1424 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1425 | if (!error) { | |
350a9b0a | 1426 | gfs2_trans_add_meta(ip->i_gl, dibh); |
539e5d6b | 1427 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa DT |
1428 | brelse(dibh); |
1429 | } | |
1430 | ||
1431 | gfs2_trans_end(sdp); | |
1432 | ||
a91ea69f | 1433 | out_gunlock: |
564e12b1 | 1434 | gfs2_glock_dq_uninit(&gh); |
b3b94faa DT |
1435 | return error; |
1436 | } | |
1437 | ||
1438 | /** | |
1439 | * gfs2_ea_dealloc - deallocate the extended attribute fork | |
1440 | * @ip: the inode | |
1441 | * | |
1442 | * Returns: errno | |
1443 | */ | |
1444 | ||
1445 | int gfs2_ea_dealloc(struct gfs2_inode *ip) | |
1446 | { | |
b3b94faa DT |
1447 | int error; |
1448 | ||
8e2e0047 BP |
1449 | error = gfs2_rindex_update(GFS2_SB(&ip->i_inode)); |
1450 | if (error) | |
1451 | return error; | |
1452 | ||
f4108a60 | 1453 | error = gfs2_quota_hold(ip, NO_UID_QUOTA_CHANGE, NO_GID_QUOTA_CHANGE); |
b3b94faa | 1454 | if (error) |
5407e242 | 1455 | return error; |
b3b94faa | 1456 | |
b3b94faa DT |
1457 | error = ea_foreach(ip, ea_dealloc_unstuffed, NULL); |
1458 | if (error) | |
8339ee54 | 1459 | goto out_quota; |
b3b94faa | 1460 | |
383f01fb | 1461 | if (ip->i_diskflags & GFS2_DIF_EA_INDIRECT) { |
b3b94faa DT |
1462 | error = ea_dealloc_indirect(ip); |
1463 | if (error) | |
8339ee54 | 1464 | goto out_quota; |
b3b94faa DT |
1465 | } |
1466 | ||
1467 | error = ea_dealloc_block(ip); | |
1468 | ||
a91ea69f | 1469 | out_quota: |
b3b94faa | 1470 | gfs2_quota_unhold(ip); |
b3b94faa DT |
1471 | return error; |
1472 | } | |
1473 | ||
b7bb0a12 | 1474 | static const struct xattr_handler gfs2_xattr_user_handler = { |
40b78a32 | 1475 | .prefix = XATTR_USER_PREFIX, |
431547b3 CH |
1476 | .flags = GFS2_EATYPE_USR, |
1477 | .get = gfs2_xattr_get, | |
1478 | .set = gfs2_xattr_set, | |
40b78a32 SW |
1479 | }; |
1480 | ||
b7bb0a12 | 1481 | static const struct xattr_handler gfs2_xattr_security_handler = { |
40b78a32 | 1482 | .prefix = XATTR_SECURITY_PREFIX, |
431547b3 CH |
1483 | .flags = GFS2_EATYPE_SECURITY, |
1484 | .get = gfs2_xattr_get, | |
1485 | .set = gfs2_xattr_set, | |
40b78a32 SW |
1486 | }; |
1487 | ||
b7bb0a12 | 1488 | const struct xattr_handler *gfs2_xattr_handlers[] = { |
40b78a32 SW |
1489 | &gfs2_xattr_user_handler, |
1490 | &gfs2_xattr_security_handler, | |
e01580bf CH |
1491 | &posix_acl_access_xattr_handler, |
1492 | &posix_acl_default_xattr_handler, | |
40b78a32 SW |
1493 | NULL, |
1494 | }; | |
1495 |