Commit | Line | Data |
---|---|---|
b3b94faa DT |
1 | /* |
2 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. | |
ca390601 | 3 | * Copyright (C) 2004-2008 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 | ||
10 | #include <linux/sched.h> | |
11 | #include <linux/slab.h> | |
12 | #include <linux/spinlock.h> | |
13 | #include <linux/completion.h> | |
14 | #include <linux/buffer_head.h> | |
15 | #include <linux/posix_acl.h> | |
16 | #include <linux/sort.h> | |
5c676f6d | 17 | #include <linux/gfs2_ondisk.h> |
71b86f56 | 18 | #include <linux/crc32.h> |
7d308590 | 19 | #include <linux/lm_interface.h> |
fcb47e0b | 20 | #include <linux/security.h> |
719ee344 | 21 | #include <linux/time.h> |
b3b94faa DT |
22 | |
23 | #include "gfs2.h" | |
5c676f6d | 24 | #include "incore.h" |
b3b94faa DT |
25 | #include "acl.h" |
26 | #include "bmap.h" | |
27 | #include "dir.h" | |
28 | #include "eattr.h" | |
29 | #include "glock.h" | |
30 | #include "glops.h" | |
31 | #include "inode.h" | |
32 | #include "log.h" | |
33 | #include "meta_io.h" | |
34 | #include "ops_address.h" | |
b3b94faa DT |
35 | #include "ops_inode.h" |
36 | #include "quota.h" | |
37 | #include "rgrp.h" | |
38 | #include "trans.h" | |
5c676f6d | 39 | #include "util.h" |
b3b94faa | 40 | |
bb8d8a6f SW |
41 | struct gfs2_inum_range_host { |
42 | u64 ir_start; | |
43 | u64 ir_length; | |
44 | }; | |
45 | ||
feaa7bba SW |
46 | static int iget_test(struct inode *inode, void *opaque) |
47 | { | |
48 | struct gfs2_inode *ip = GFS2_I(inode); | |
dbb7cae2 | 49 | u64 *no_addr = opaque; |
feaa7bba | 50 | |
091806ed | 51 | if (ip->i_no_addr == *no_addr && test_bit(GIF_USER, &ip->i_flags)) |
feaa7bba | 52 | return 1; |
b3b94faa | 53 | |
feaa7bba SW |
54 | return 0; |
55 | } | |
56 | ||
57 | static int iget_set(struct inode *inode, void *opaque) | |
b3b94faa | 58 | { |
feaa7bba | 59 | struct gfs2_inode *ip = GFS2_I(inode); |
dbb7cae2 | 60 | u64 *no_addr = opaque; |
b3b94faa | 61 | |
dbb7cae2 SW |
62 | inode->i_ino = (unsigned long)*no_addr; |
63 | ip->i_no_addr = *no_addr; | |
091806ed | 64 | set_bit(GIF_USER, &ip->i_flags); |
feaa7bba SW |
65 | return 0; |
66 | } | |
b3b94faa | 67 | |
dbb7cae2 | 68 | struct inode *gfs2_ilookup(struct super_block *sb, u64 no_addr) |
feaa7bba | 69 | { |
dbb7cae2 SW |
70 | unsigned long hash = (unsigned long)no_addr; |
71 | return ilookup5(sb, hash, iget_test, &no_addr); | |
feaa7bba | 72 | } |
b3b94faa | 73 | |
dbb7cae2 | 74 | static struct inode *gfs2_iget(struct super_block *sb, u64 no_addr) |
feaa7bba | 75 | { |
dbb7cae2 SW |
76 | unsigned long hash = (unsigned long)no_addr; |
77 | return iget5_locked(sb, hash, iget_test, iget_set, &no_addr); | |
b3b94faa DT |
78 | } |
79 | ||
7a9f53b3 BM |
80 | struct gfs2_skip_data { |
81 | u64 no_addr; | |
82 | int skipped; | |
83 | }; | |
84 | ||
85 | static int iget_skip_test(struct inode *inode, void *opaque) | |
86 | { | |
87 | struct gfs2_inode *ip = GFS2_I(inode); | |
88 | struct gfs2_skip_data *data = opaque; | |
89 | ||
091806ed | 90 | if (ip->i_no_addr == data->no_addr && test_bit(GIF_USER, &ip->i_flags)){ |
7a9f53b3 BM |
91 | if (inode->i_state & (I_FREEING|I_CLEAR|I_WILL_FREE)){ |
92 | data->skipped = 1; | |
93 | return 0; | |
94 | } | |
95 | return 1; | |
96 | } | |
97 | return 0; | |
98 | } | |
99 | ||
100 | static int iget_skip_set(struct inode *inode, void *opaque) | |
101 | { | |
102 | struct gfs2_inode *ip = GFS2_I(inode); | |
103 | struct gfs2_skip_data *data = opaque; | |
104 | ||
105 | if (data->skipped) | |
106 | return 1; | |
107 | inode->i_ino = (unsigned long)(data->no_addr); | |
108 | ip->i_no_addr = data->no_addr; | |
091806ed | 109 | set_bit(GIF_USER, &ip->i_flags); |
7a9f53b3 BM |
110 | return 0; |
111 | } | |
112 | ||
113 | static struct inode *gfs2_iget_skip(struct super_block *sb, | |
114 | u64 no_addr) | |
115 | { | |
116 | struct gfs2_skip_data data; | |
117 | unsigned long hash = (unsigned long)no_addr; | |
118 | ||
119 | data.no_addr = no_addr; | |
120 | data.skipped = 0; | |
121 | return iget5_locked(sb, hash, iget_skip_test, iget_skip_set, &data); | |
122 | } | |
123 | ||
35dcc52e WC |
124 | /** |
125 | * GFS2 lookup code fills in vfs inode contents based on info obtained | |
126 | * from directory entry inside gfs2_inode_lookup(). This has caused issues | |
127 | * with NFS code path since its get_dentry routine doesn't have the relevant | |
128 | * directory entry when gfs2_inode_lookup() is invoked. Part of the code | |
129 | * segment inside gfs2_inode_lookup code needs to get moved around. | |
130 | * | |
131 | * Clean up I_LOCK and I_NEW as well. | |
132 | **/ | |
133 | ||
134 | void gfs2_set_iop(struct inode *inode) | |
135 | { | |
c97bfe43 | 136 | struct gfs2_sbd *sdp = GFS2_SB(inode); |
35dcc52e WC |
137 | umode_t mode = inode->i_mode; |
138 | ||
139 | if (S_ISREG(mode)) { | |
140 | inode->i_op = &gfs2_file_iops; | |
c97bfe43 WC |
141 | if (sdp->sd_args.ar_localflocks) |
142 | inode->i_fop = &gfs2_file_fops_nolock; | |
143 | else | |
144 | inode->i_fop = &gfs2_file_fops; | |
35dcc52e WC |
145 | } else if (S_ISDIR(mode)) { |
146 | inode->i_op = &gfs2_dir_iops; | |
c97bfe43 WC |
147 | if (sdp->sd_args.ar_localflocks) |
148 | inode->i_fop = &gfs2_dir_fops_nolock; | |
149 | else | |
150 | inode->i_fop = &gfs2_dir_fops; | |
35dcc52e WC |
151 | } else if (S_ISLNK(mode)) { |
152 | inode->i_op = &gfs2_symlink_iops; | |
153 | } else { | |
d83225d4 | 154 | inode->i_op = &gfs2_file_iops; |
43a33c53 | 155 | init_special_inode(inode, inode->i_mode, inode->i_rdev); |
35dcc52e WC |
156 | } |
157 | ||
158 | unlock_new_inode(inode); | |
159 | } | |
160 | ||
b3b94faa | 161 | /** |
feaa7bba SW |
162 | * gfs2_inode_lookup - Lookup an inode |
163 | * @sb: The super block | |
dbb7cae2 | 164 | * @no_addr: The inode number |
feaa7bba | 165 | * @type: The type of the inode |
7a9f53b3 | 166 | * @skip_freeing: set this not return an inode if it is currently being freed. |
b3b94faa | 167 | * |
feaa7bba | 168 | * Returns: A VFS inode, or an error |
b3b94faa DT |
169 | */ |
170 | ||
091806ed | 171 | struct inode *gfs2_inode_lookup(struct super_block *sb, |
bb9bcf06 WC |
172 | unsigned int type, |
173 | u64 no_addr, | |
7a9f53b3 | 174 | u64 no_formal_ino, int skip_freeing) |
b3b94faa | 175 | { |
7a9f53b3 BM |
176 | struct inode *inode; |
177 | struct gfs2_inode *ip; | |
feaa7bba SW |
178 | struct gfs2_glock *io_gl; |
179 | int error; | |
b3b94faa | 180 | |
7a9f53b3 BM |
181 | if (skip_freeing) |
182 | inode = gfs2_iget_skip(sb, no_addr); | |
183 | else | |
184 | inode = gfs2_iget(sb, no_addr); | |
185 | ip = GFS2_I(inode); | |
186 | ||
26d83ded SW |
187 | if (!inode) |
188 | return ERR_PTR(-ENOBUFS); | |
189 | ||
feaa7bba SW |
190 | if (inode->i_state & I_NEW) { |
191 | struct gfs2_sbd *sdp = GFS2_SB(inode); | |
bb9bcf06 | 192 | ip->i_no_formal_ino = no_formal_ino; |
b3b94faa | 193 | |
dbb7cae2 | 194 | error = gfs2_glock_get(sdp, no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl); |
feaa7bba SW |
195 | if (unlikely(error)) |
196 | goto fail; | |
197 | ip->i_gl->gl_object = ip; | |
b3b94faa | 198 | |
dbb7cae2 | 199 | error = gfs2_glock_get(sdp, no_addr, &gfs2_iopen_glops, CREATE, &io_gl); |
feaa7bba SW |
200 | if (unlikely(error)) |
201 | goto fail_put; | |
b3b94faa | 202 | |
bfded27b | 203 | set_bit(GIF_INVALID, &ip->i_flags); |
feaa7bba SW |
204 | error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh); |
205 | if (unlikely(error)) | |
206 | goto fail_iopen; | |
d93cfa98 | 207 | ip->i_iopen_gh.gh_gl->gl_object = ip; |
b3b94faa | 208 | |
feaa7bba | 209 | gfs2_glock_put(io_gl); |
c8cdf479 | 210 | |
35dcc52e WC |
211 | if ((type == DT_UNKNOWN) && (no_formal_ino == 0)) |
212 | goto gfs2_nfsbypass; | |
213 | ||
214 | inode->i_mode = DT2IF(type); | |
215 | ||
c8cdf479 SW |
216 | /* |
217 | * We must read the inode in order to work out its type in | |
218 | * this case. Note that this doesn't happen often as we normally | |
219 | * know the type beforehand. This code path only occurs during | |
220 | * unlinked inode recovery (where it is safe to do this glock, | |
221 | * which is not true in the general case). | |
222 | */ | |
c8cdf479 SW |
223 | if (type == DT_UNKNOWN) { |
224 | struct gfs2_holder gh; | |
225 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); | |
226 | if (unlikely(error)) | |
227 | goto fail_glock; | |
228 | /* Inode is now uptodate */ | |
c8cdf479 SW |
229 | gfs2_glock_dq_uninit(&gh); |
230 | } | |
231 | ||
35dcc52e | 232 | gfs2_set_iop(inode); |
feaa7bba | 233 | } |
b3b94faa | 234 | |
35dcc52e | 235 | gfs2_nfsbypass: |
b3b94faa | 236 | return inode; |
c8cdf479 SW |
237 | fail_glock: |
238 | gfs2_glock_dq(&ip->i_iopen_gh); | |
feaa7bba SW |
239 | fail_iopen: |
240 | gfs2_glock_put(io_gl); | |
241 | fail_put: | |
242 | ip->i_gl->gl_object = NULL; | |
243 | gfs2_glock_put(ip->i_gl); | |
244 | fail: | |
69840b0d | 245 | iget_failed(inode); |
feaa7bba | 246 | return ERR_PTR(error); |
b3b94faa DT |
247 | } |
248 | ||
af339c02 | 249 | static int gfs2_dinode_in(struct gfs2_inode *ip, const void *buf) |
ea744d01 SW |
250 | { |
251 | struct gfs2_dinode_host *di = &ip->i_di; | |
252 | const struct gfs2_dinode *str = buf; | |
719ee344 | 253 | struct timespec atime; |
9a004508 | 254 | u16 height, depth; |
ea744d01 | 255 | |
ecc30c79 SW |
256 | if (unlikely(ip->i_no_addr != be64_to_cpu(str->di_num.no_addr))) |
257 | goto corrupt; | |
dbb7cae2 | 258 | ip->i_no_formal_ino = be64_to_cpu(str->di_num.no_formal_ino); |
b60623c2 | 259 | ip->i_inode.i_mode = be32_to_cpu(str->di_mode); |
e7f14f4d | 260 | ip->i_inode.i_rdev = 0; |
b60623c2 | 261 | switch (ip->i_inode.i_mode & S_IFMT) { |
e7f14f4d SW |
262 | case S_IFBLK: |
263 | case S_IFCHR: | |
264 | ip->i_inode.i_rdev = MKDEV(be32_to_cpu(str->di_major), | |
265 | be32_to_cpu(str->di_minor)); | |
266 | break; | |
267 | }; | |
268 | ||
2933f925 SW |
269 | ip->i_inode.i_uid = be32_to_cpu(str->di_uid); |
270 | ip->i_inode.i_gid = be32_to_cpu(str->di_gid); | |
4f56110a SW |
271 | /* |
272 | * We will need to review setting the nlink count here in the | |
273 | * light of the forthcoming ro bind mount work. This is a reminder | |
274 | * to do that. | |
275 | */ | |
276 | ip->i_inode.i_nlink = be32_to_cpu(str->di_nlink); | |
ea744d01 | 277 | di->di_size = be64_to_cpu(str->di_size); |
9e2dbdac | 278 | i_size_write(&ip->i_inode, di->di_size); |
77658aad | 279 | gfs2_set_inode_blocks(&ip->i_inode, be64_to_cpu(str->di_blocks)); |
719ee344 SW |
280 | atime.tv_sec = be64_to_cpu(str->di_atime); |
281 | atime.tv_nsec = be32_to_cpu(str->di_atime_nsec); | |
282 | if (timespec_compare(&ip->i_inode.i_atime, &atime) < 0) | |
283 | ip->i_inode.i_atime = atime; | |
1a7b1eed | 284 | ip->i_inode.i_mtime.tv_sec = be64_to_cpu(str->di_mtime); |
4bd91ba1 | 285 | ip->i_inode.i_mtime.tv_nsec = be32_to_cpu(str->di_mtime_nsec); |
1a7b1eed | 286 | ip->i_inode.i_ctime.tv_sec = be64_to_cpu(str->di_ctime); |
4bd91ba1 | 287 | ip->i_inode.i_ctime.tv_nsec = be32_to_cpu(str->di_ctime_nsec); |
ea744d01 | 288 | |
ce276b06 | 289 | ip->i_goal = be64_to_cpu(str->di_goal_meta); |
ea744d01 SW |
290 | di->di_generation = be64_to_cpu(str->di_generation); |
291 | ||
292 | di->di_flags = be32_to_cpu(str->di_flags); | |
6b124d8d | 293 | gfs2_set_inode_flags(&ip->i_inode); |
ecc30c79 SW |
294 | height = be16_to_cpu(str->di_height); |
295 | if (unlikely(height > GFS2_MAX_META_HEIGHT)) | |
296 | goto corrupt; | |
297 | ip->i_height = (u8)height; | |
ea744d01 | 298 | |
9a004508 SW |
299 | depth = be16_to_cpu(str->di_depth); |
300 | if (unlikely(depth > GFS2_DIR_MAX_DEPTH)) | |
301 | goto corrupt; | |
302 | ip->i_depth = (u8)depth; | |
ea744d01 SW |
303 | di->di_entries = be32_to_cpu(str->di_entries); |
304 | ||
305 | di->di_eattr = be64_to_cpu(str->di_eattr); | |
5561093e SW |
306 | if (S_ISREG(ip->i_inode.i_mode)) |
307 | gfs2_set_aops(&ip->i_inode); | |
308 | ||
af339c02 | 309 | return 0; |
ecc30c79 SW |
310 | corrupt: |
311 | if (gfs2_consist_inode(ip)) | |
312 | gfs2_dinode_print(ip); | |
313 | return -EIO; | |
ea744d01 SW |
314 | } |
315 | ||
b3b94faa DT |
316 | /** |
317 | * gfs2_inode_refresh - Refresh the incore copy of the dinode | |
318 | * @ip: The GFS2 inode | |
319 | * | |
320 | * Returns: errno | |
321 | */ | |
322 | ||
323 | int gfs2_inode_refresh(struct gfs2_inode *ip) | |
324 | { | |
325 | struct buffer_head *dibh; | |
326 | int error; | |
327 | ||
328 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
329 | if (error) | |
330 | return error; | |
331 | ||
feaa7bba | 332 | if (gfs2_metatype_check(GFS2_SB(&ip->i_inode), dibh, GFS2_METATYPE_DI)) { |
b3b94faa DT |
333 | brelse(dibh); |
334 | return -EIO; | |
335 | } | |
336 | ||
af339c02 | 337 | error = gfs2_dinode_in(ip, dibh->b_data); |
b3b94faa | 338 | brelse(dibh); |
bfded27b | 339 | clear_bit(GIF_INVALID, &ip->i_flags); |
b3b94faa | 340 | |
af339c02 | 341 | return error; |
b3b94faa DT |
342 | } |
343 | ||
feaa7bba | 344 | int gfs2_dinode_dealloc(struct gfs2_inode *ip) |
b3b94faa | 345 | { |
feaa7bba | 346 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa DT |
347 | struct gfs2_alloc *al; |
348 | struct gfs2_rgrpd *rgd; | |
349 | int error; | |
350 | ||
77658aad | 351 | if (gfs2_get_inode_blocks(&ip->i_inode) != 1) { |
b3b94faa | 352 | if (gfs2_consist_inode(ip)) |
4cc14f0b | 353 | gfs2_dinode_print(ip); |
b3b94faa DT |
354 | return -EIO; |
355 | } | |
356 | ||
357 | al = gfs2_alloc_get(ip); | |
182fe5ab CG |
358 | if (!al) |
359 | return -ENOMEM; | |
b3b94faa DT |
360 | |
361 | error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE); | |
362 | if (error) | |
363 | goto out; | |
364 | ||
365 | error = gfs2_rindex_hold(sdp, &al->al_ri_gh); | |
366 | if (error) | |
367 | goto out_qs; | |
368 | ||
dbb7cae2 | 369 | rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr); |
b3b94faa DT |
370 | if (!rgd) { |
371 | gfs2_consist_inode(ip); | |
372 | error = -EIO; | |
373 | goto out_rindex_relse; | |
374 | } | |
375 | ||
376 | error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, | |
377 | &al->al_rgd_gh); | |
378 | if (error) | |
379 | goto out_rindex_relse; | |
380 | ||
420b9e5e | 381 | error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_STATFS + RES_QUOTA, 1); |
b3b94faa DT |
382 | if (error) |
383 | goto out_rg_gunlock; | |
384 | ||
2bcd610d SW |
385 | set_bit(GLF_DIRTY, &ip->i_gl->gl_flags); |
386 | set_bit(GLF_LFLUSH, &ip->i_gl->gl_flags); | |
b3b94faa DT |
387 | |
388 | gfs2_free_di(rgd, ip); | |
389 | ||
b3b94faa DT |
390 | gfs2_trans_end(sdp); |
391 | clear_bit(GLF_STICKY, &ip->i_gl->gl_flags); | |
392 | ||
feaa7bba | 393 | out_rg_gunlock: |
b3b94faa | 394 | gfs2_glock_dq_uninit(&al->al_rgd_gh); |
feaa7bba | 395 | out_rindex_relse: |
b3b94faa | 396 | gfs2_glock_dq_uninit(&al->al_ri_gh); |
feaa7bba | 397 | out_qs: |
b3b94faa | 398 | gfs2_quota_unhold(ip); |
36327521 | 399 | out: |
feaa7bba | 400 | gfs2_alloc_put(ip); |
b3b94faa DT |
401 | return error; |
402 | } | |
403 | ||
b3b94faa | 404 | /** |
87d21e07 | 405 | * gfs2_change_nlink - Change nlink count on inode |
b3b94faa DT |
406 | * @ip: The GFS2 inode |
407 | * @diff: The change in the nlink count required | |
408 | * | |
409 | * Returns: errno | |
410 | */ | |
87d21e07 | 411 | int gfs2_change_nlink(struct gfs2_inode *ip, int diff) |
b3b94faa DT |
412 | { |
413 | struct buffer_head *dibh; | |
cd915493 | 414 | u32 nlink; |
b3b94faa DT |
415 | int error; |
416 | ||
4f56110a SW |
417 | BUG_ON(diff != 1 && diff != -1); |
418 | nlink = ip->i_inode.i_nlink + diff; | |
b3b94faa DT |
419 | |
420 | /* If we are reducing the nlink count, but the new value ends up being | |
421 | bigger than the old one, we must have underflowed. */ | |
4f56110a | 422 | if (diff < 0 && nlink > ip->i_inode.i_nlink) { |
b3b94faa | 423 | if (gfs2_consist_inode(ip)) |
4cc14f0b | 424 | gfs2_dinode_print(ip); |
b3b94faa DT |
425 | return -EIO; |
426 | } | |
427 | ||
428 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
429 | if (error) | |
430 | return error; | |
431 | ||
4f56110a SW |
432 | if (diff > 0) |
433 | inc_nlink(&ip->i_inode); | |
434 | else | |
435 | drop_nlink(&ip->i_inode); | |
436 | ||
4bd91ba1 | 437 | ip->i_inode.i_ctime = CURRENT_TIME; |
b3b94faa | 438 | |
d4e9c4c3 | 439 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
539e5d6b | 440 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa | 441 | brelse(dibh); |
feaa7bba | 442 | mark_inode_dirty(&ip->i_inode); |
b3b94faa | 443 | |
87d21e07 | 444 | if (ip->i_inode.i_nlink == 0) |
ddee7608 | 445 | gfs2_unlink_di(&ip->i_inode); /* mark inode unlinked */ |
87d21e07 | 446 | |
5509826f WC |
447 | return error; |
448 | } | |
449 | ||
c752666c SW |
450 | struct inode *gfs2_lookup_simple(struct inode *dip, const char *name) |
451 | { | |
452 | struct qstr qstr; | |
6c93fd1e | 453 | struct inode *inode; |
71b86f56 | 454 | gfs2_str2qstr(&qstr, name); |
a569c711 | 455 | inode = gfs2_lookupi(dip, &qstr, 1); |
6c93fd1e RC |
456 | /* gfs2_lookupi has inconsistent callers: vfs |
457 | * related routines expect NULL for no entry found, | |
458 | * gfs2_lookup_simple callers expect ENOENT | |
459 | * and do not check for NULL. | |
460 | */ | |
461 | if (inode == NULL) | |
462 | return ERR_PTR(-ENOENT); | |
463 | else | |
464 | return inode; | |
c752666c SW |
465 | } |
466 | ||
467 | ||
b3b94faa DT |
468 | /** |
469 | * gfs2_lookupi - Look up a filename in a directory and return its inode | |
470 | * @d_gh: An initialized holder for the directory glock | |
471 | * @name: The name of the inode to look for | |
472 | * @is_root: If 1, ignore the caller's permissions | |
473 | * @i_gh: An uninitialized holder for the new inode glock | |
474 | * | |
d7c103d0 SW |
475 | * This can be called via the VFS filldir function when NFS is doing |
476 | * a readdirplus and the inode which its intending to stat isn't | |
477 | * already in cache. In this case we must not take the directory glock | |
478 | * again, since the readdir call will have already taken that lock. | |
b3b94faa DT |
479 | * |
480 | * Returns: errno | |
481 | */ | |
482 | ||
feaa7bba | 483 | struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name, |
a569c711 | 484 | int is_root) |
b3b94faa | 485 | { |
c9fd4307 | 486 | struct super_block *sb = dir->i_sb; |
feaa7bba | 487 | struct gfs2_inode *dip = GFS2_I(dir); |
b3b94faa | 488 | struct gfs2_holder d_gh; |
037bcbb7 | 489 | int error = 0; |
c752666c | 490 | struct inode *inode = NULL; |
d7c103d0 | 491 | int unlock = 0; |
b3b94faa DT |
492 | |
493 | if (!name->len || name->len > GFS2_FNAMESIZE) | |
c752666c | 494 | return ERR_PTR(-ENAMETOOLONG); |
b3b94faa | 495 | |
c752666c SW |
496 | if ((name->len == 1 && memcmp(name->name, ".", 1) == 0) || |
497 | (name->len == 2 && memcmp(name->name, "..", 2) == 0 && | |
498 | dir == sb->s_root->d_inode)) { | |
320dd101 SW |
499 | igrab(dir); |
500 | return dir; | |
b3b94faa DT |
501 | } |
502 | ||
7afd88d9 | 503 | if (gfs2_glock_is_locked_by_me(dip->i_gl) == NULL) { |
d7c103d0 SW |
504 | error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh); |
505 | if (error) | |
506 | return ERR_PTR(error); | |
507 | unlock = 1; | |
508 | } | |
b3b94faa DT |
509 | |
510 | if (!is_root) { | |
f58ba889 | 511 | error = gfs2_permission(dir, MAY_EXEC); |
b3b94faa DT |
512 | if (error) |
513 | goto out; | |
514 | } | |
515 | ||
dbb7cae2 SW |
516 | inode = gfs2_dir_search(dir, name); |
517 | if (IS_ERR(inode)) | |
518 | error = PTR_ERR(inode); | |
7359a19c | 519 | out: |
d7c103d0 SW |
520 | if (unlock) |
521 | gfs2_glock_dq_uninit(&d_gh); | |
c752666c SW |
522 | if (error == -ENOENT) |
523 | return NULL; | |
d7c103d0 | 524 | return inode ? inode : ERR_PTR(error); |
b3b94faa DT |
525 | } |
526 | ||
bb8d8a6f SW |
527 | static void gfs2_inum_range_in(struct gfs2_inum_range_host *ir, const void *buf) |
528 | { | |
529 | const struct gfs2_inum_range *str = buf; | |
530 | ||
531 | ir->ir_start = be64_to_cpu(str->ir_start); | |
532 | ir->ir_length = be64_to_cpu(str->ir_length); | |
533 | } | |
534 | ||
535 | static void gfs2_inum_range_out(const struct gfs2_inum_range_host *ir, void *buf) | |
536 | { | |
537 | struct gfs2_inum_range *str = buf; | |
538 | ||
539 | str->ir_start = cpu_to_be64(ir->ir_start); | |
540 | str->ir_length = cpu_to_be64(ir->ir_length); | |
541 | } | |
542 | ||
cd915493 | 543 | static int pick_formal_ino_1(struct gfs2_sbd *sdp, u64 *formal_ino) |
b3b94faa | 544 | { |
feaa7bba | 545 | struct gfs2_inode *ip = GFS2_I(sdp->sd_ir_inode); |
b3b94faa | 546 | struct buffer_head *bh; |
e6972647 | 547 | struct gfs2_inum_range_host ir; |
b3b94faa DT |
548 | int error; |
549 | ||
550 | error = gfs2_trans_begin(sdp, RES_DINODE, 0); | |
551 | if (error) | |
552 | return error; | |
f55ab26a | 553 | mutex_lock(&sdp->sd_inum_mutex); |
b3b94faa DT |
554 | |
555 | error = gfs2_meta_inode_buffer(ip, &bh); | |
556 | if (error) { | |
f55ab26a | 557 | mutex_unlock(&sdp->sd_inum_mutex); |
b3b94faa DT |
558 | gfs2_trans_end(sdp); |
559 | return error; | |
560 | } | |
561 | ||
562 | gfs2_inum_range_in(&ir, bh->b_data + sizeof(struct gfs2_dinode)); | |
563 | ||
564 | if (ir.ir_length) { | |
565 | *formal_ino = ir.ir_start++; | |
566 | ir.ir_length--; | |
d4e9c4c3 | 567 | gfs2_trans_add_bh(ip->i_gl, bh, 1); |
b3b94faa DT |
568 | gfs2_inum_range_out(&ir, |
569 | bh->b_data + sizeof(struct gfs2_dinode)); | |
570 | brelse(bh); | |
f55ab26a | 571 | mutex_unlock(&sdp->sd_inum_mutex); |
b3b94faa DT |
572 | gfs2_trans_end(sdp); |
573 | return 0; | |
574 | } | |
575 | ||
576 | brelse(bh); | |
577 | ||
f55ab26a | 578 | mutex_unlock(&sdp->sd_inum_mutex); |
b3b94faa DT |
579 | gfs2_trans_end(sdp); |
580 | ||
581 | return 1; | |
582 | } | |
583 | ||
cd915493 | 584 | static int pick_formal_ino_2(struct gfs2_sbd *sdp, u64 *formal_ino) |
b3b94faa | 585 | { |
feaa7bba SW |
586 | struct gfs2_inode *ip = GFS2_I(sdp->sd_ir_inode); |
587 | struct gfs2_inode *m_ip = GFS2_I(sdp->sd_inum_inode); | |
b3b94faa DT |
588 | struct gfs2_holder gh; |
589 | struct buffer_head *bh; | |
e6972647 | 590 | struct gfs2_inum_range_host ir; |
b3b94faa DT |
591 | int error; |
592 | ||
593 | error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); | |
594 | if (error) | |
595 | return error; | |
596 | ||
597 | error = gfs2_trans_begin(sdp, 2 * RES_DINODE, 0); | |
598 | if (error) | |
599 | goto out; | |
f55ab26a | 600 | mutex_lock(&sdp->sd_inum_mutex); |
b3b94faa DT |
601 | |
602 | error = gfs2_meta_inode_buffer(ip, &bh); | |
603 | if (error) | |
604 | goto out_end_trans; | |
907b9bce | 605 | |
b3b94faa DT |
606 | gfs2_inum_range_in(&ir, bh->b_data + sizeof(struct gfs2_dinode)); |
607 | ||
608 | if (!ir.ir_length) { | |
609 | struct buffer_head *m_bh; | |
cd915493 | 610 | u64 x, y; |
b44b84d7 | 611 | __be64 z; |
b3b94faa DT |
612 | |
613 | error = gfs2_meta_inode_buffer(m_ip, &m_bh); | |
614 | if (error) | |
615 | goto out_brelse; | |
616 | ||
b44b84d7 AV |
617 | z = *(__be64 *)(m_bh->b_data + sizeof(struct gfs2_dinode)); |
618 | x = y = be64_to_cpu(z); | |
b3b94faa DT |
619 | ir.ir_start = x; |
620 | ir.ir_length = GFS2_INUM_QUANTUM; | |
621 | x += GFS2_INUM_QUANTUM; | |
622 | if (x < y) | |
623 | gfs2_consist_inode(m_ip); | |
b44b84d7 | 624 | z = cpu_to_be64(x); |
d4e9c4c3 | 625 | gfs2_trans_add_bh(m_ip->i_gl, m_bh, 1); |
b44b84d7 | 626 | *(__be64 *)(m_bh->b_data + sizeof(struct gfs2_dinode)) = z; |
b3b94faa DT |
627 | |
628 | brelse(m_bh); | |
629 | } | |
630 | ||
631 | *formal_ino = ir.ir_start++; | |
632 | ir.ir_length--; | |
633 | ||
d4e9c4c3 | 634 | gfs2_trans_add_bh(ip->i_gl, bh, 1); |
b3b94faa DT |
635 | gfs2_inum_range_out(&ir, bh->b_data + sizeof(struct gfs2_dinode)); |
636 | ||
420b9e5e | 637 | out_brelse: |
b3b94faa | 638 | brelse(bh); |
420b9e5e | 639 | out_end_trans: |
f55ab26a | 640 | mutex_unlock(&sdp->sd_inum_mutex); |
b3b94faa | 641 | gfs2_trans_end(sdp); |
420b9e5e | 642 | out: |
b3b94faa | 643 | gfs2_glock_dq_uninit(&gh); |
b3b94faa DT |
644 | return error; |
645 | } | |
646 | ||
cd915493 | 647 | static int pick_formal_ino(struct gfs2_sbd *sdp, u64 *inum) |
b3b94faa DT |
648 | { |
649 | int error; | |
650 | ||
651 | error = pick_formal_ino_1(sdp, inum); | |
652 | if (error <= 0) | |
653 | return error; | |
654 | ||
655 | error = pick_formal_ino_2(sdp, inum); | |
656 | ||
657 | return error; | |
658 | } | |
659 | ||
660 | /** | |
661 | * create_ok - OK to create a new on-disk inode here? | |
662 | * @dip: Directory in which dinode is to be created | |
663 | * @name: Name of new dinode | |
664 | * @mode: | |
665 | * | |
666 | * Returns: errno | |
667 | */ | |
668 | ||
feaa7bba | 669 | static int create_ok(struct gfs2_inode *dip, const struct qstr *name, |
b3b94faa DT |
670 | unsigned int mode) |
671 | { | |
672 | int error; | |
673 | ||
f58ba889 | 674 | error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC); |
b3b94faa DT |
675 | if (error) |
676 | return error; | |
677 | ||
678 | /* Don't create entries in an unlinked directory */ | |
4f56110a | 679 | if (!dip->i_inode.i_nlink) |
b3b94faa DT |
680 | return -EPERM; |
681 | ||
dbb7cae2 | 682 | error = gfs2_dir_check(&dip->i_inode, name, NULL); |
b3b94faa DT |
683 | switch (error) { |
684 | case -ENOENT: | |
685 | error = 0; | |
686 | break; | |
687 | case 0: | |
688 | return -EEXIST; | |
689 | default: | |
690 | return error; | |
691 | } | |
692 | ||
cd915493 | 693 | if (dip->i_di.di_entries == (u32)-1) |
b3b94faa | 694 | return -EFBIG; |
4f56110a | 695 | if (S_ISDIR(mode) && dip->i_inode.i_nlink == (u32)-1) |
b3b94faa DT |
696 | return -EMLINK; |
697 | ||
698 | return 0; | |
699 | } | |
700 | ||
701 | static void munge_mode_uid_gid(struct gfs2_inode *dip, unsigned int *mode, | |
702 | unsigned int *uid, unsigned int *gid) | |
703 | { | |
feaa7bba | 704 | if (GFS2_SB(&dip->i_inode)->sd_args.ar_suiddir && |
2933f925 | 705 | (dip->i_inode.i_mode & S_ISUID) && dip->i_inode.i_uid) { |
b3b94faa DT |
706 | if (S_ISDIR(*mode)) |
707 | *mode |= S_ISUID; | |
3de7be33 | 708 | else if (dip->i_inode.i_uid != current_fsuid()) |
b3b94faa | 709 | *mode &= ~07111; |
2933f925 | 710 | *uid = dip->i_inode.i_uid; |
b3b94faa | 711 | } else |
3de7be33 | 712 | *uid = current_fsuid(); |
b3b94faa | 713 | |
b60623c2 | 714 | if (dip->i_inode.i_mode & S_ISGID) { |
b3b94faa DT |
715 | if (S_ISDIR(*mode)) |
716 | *mode |= S_ISGID; | |
2933f925 | 717 | *gid = dip->i_inode.i_gid; |
b3b94faa | 718 | } else |
3de7be33 | 719 | *gid = current_fsgid(); |
b3b94faa DT |
720 | } |
721 | ||
dbb7cae2 | 722 | static int alloc_dinode(struct gfs2_inode *dip, u64 *no_addr, u64 *generation) |
b3b94faa | 723 | { |
feaa7bba | 724 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); |
b3b94faa DT |
725 | int error; |
726 | ||
6dbd8224 SW |
727 | if (gfs2_alloc_get(dip) == NULL) |
728 | return -ENOMEM; | |
b3b94faa | 729 | |
6dbd8224 | 730 | dip->i_alloc->al_requested = RES_DINODE; |
b3b94faa DT |
731 | error = gfs2_inplace_reserve(dip); |
732 | if (error) | |
733 | goto out; | |
734 | ||
feaa7bba | 735 | error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_STATFS, 0); |
b3b94faa DT |
736 | if (error) |
737 | goto out_ipreserv; | |
738 | ||
dbb7cae2 | 739 | *no_addr = gfs2_alloc_di(dip, generation); |
b3b94faa DT |
740 | |
741 | gfs2_trans_end(sdp); | |
742 | ||
4340fe62 | 743 | out_ipreserv: |
b3b94faa | 744 | gfs2_inplace_release(dip); |
4340fe62 | 745 | out: |
b3b94faa | 746 | gfs2_alloc_put(dip); |
b3b94faa DT |
747 | return error; |
748 | } | |
749 | ||
750 | /** | |
751 | * init_dinode - Fill in a new dinode structure | |
752 | * @dip: the directory this inode is being created in | |
753 | * @gl: The glock covering the new inode | |
754 | * @inum: the inode number | |
755 | * @mode: the file permissions | |
756 | * @uid: | |
757 | * @gid: | |
758 | * | |
759 | */ | |
760 | ||
761 | static void init_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl, | |
629a21e7 | 762 | const struct gfs2_inum_host *inum, unsigned int mode, |
4340fe62 | 763 | unsigned int uid, unsigned int gid, |
e9bd2b3b | 764 | const u64 *generation, dev_t dev, struct buffer_head **bhp) |
b3b94faa | 765 | { |
feaa7bba | 766 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); |
b96ca4fa | 767 | struct gfs2_dinode *di; |
b3b94faa | 768 | struct buffer_head *dibh; |
4bd91ba1 | 769 | struct timespec tv = CURRENT_TIME; |
b3b94faa DT |
770 | |
771 | dibh = gfs2_meta_new(gl, inum->no_addr); | |
d4e9c4c3 | 772 | gfs2_trans_add_bh(gl, dibh, 1); |
b3b94faa DT |
773 | gfs2_metatype_set(dibh, GFS2_METATYPE_DI, GFS2_FORMAT_DI); |
774 | gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode)); | |
b96ca4fa SW |
775 | di = (struct gfs2_dinode *)dibh->b_data; |
776 | ||
2442a098 SW |
777 | di->di_num.no_formal_ino = cpu_to_be64(inum->no_formal_ino); |
778 | di->di_num.no_addr = cpu_to_be64(inum->no_addr); | |
b96ca4fa SW |
779 | di->di_mode = cpu_to_be32(mode); |
780 | di->di_uid = cpu_to_be32(uid); | |
781 | di->di_gid = cpu_to_be32(gid); | |
294caaa3 SW |
782 | di->di_nlink = 0; |
783 | di->di_size = 0; | |
b96ca4fa | 784 | di->di_blocks = cpu_to_be64(1); |
4bd91ba1 | 785 | di->di_atime = di->di_mtime = di->di_ctime = cpu_to_be64(tv.tv_sec); |
e7f14f4d SW |
786 | di->di_major = cpu_to_be32(MAJOR(dev)); |
787 | di->di_minor = cpu_to_be32(MINOR(dev)); | |
b96ca4fa | 788 | di->di_goal_meta = di->di_goal_data = cpu_to_be64(inum->no_addr); |
4340fe62 | 789 | di->di_generation = cpu_to_be64(*generation); |
294caaa3 | 790 | di->di_flags = 0; |
b3b94faa DT |
791 | |
792 | if (S_ISREG(mode)) { | |
793 | if ((dip->i_di.di_flags & GFS2_DIF_INHERIT_JDATA) || | |
794 | gfs2_tune_get(sdp, gt_new_files_jdata)) | |
b96ca4fa | 795 | di->di_flags |= cpu_to_be32(GFS2_DIF_JDATA); |
b3b94faa | 796 | } else if (S_ISDIR(mode)) { |
568f4c96 SW |
797 | di->di_flags |= cpu_to_be32(dip->i_di.di_flags & |
798 | GFS2_DIF_INHERIT_JDATA); | |
b3b94faa DT |
799 | } |
800 | ||
b96ca4fa | 801 | di->__pad1 = 0; |
a9583c79 | 802 | di->di_payload_format = cpu_to_be32(S_ISDIR(mode) ? GFS2_FORMAT_DE : 0); |
294caaa3 | 803 | di->di_height = 0; |
b96ca4fa SW |
804 | di->__pad2 = 0; |
805 | di->__pad3 = 0; | |
294caaa3 SW |
806 | di->di_depth = 0; |
807 | di->di_entries = 0; | |
b96ca4fa | 808 | memset(&di->__pad4, 0, sizeof(di->__pad4)); |
294caaa3 | 809 | di->di_eattr = 0; |
4bd91ba1 SW |
810 | di->di_atime_nsec = cpu_to_be32(tv.tv_nsec); |
811 | di->di_mtime_nsec = cpu_to_be32(tv.tv_nsec); | |
812 | di->di_ctime_nsec = cpu_to_be32(tv.tv_nsec); | |
b96ca4fa | 813 | memset(&di->di_reserved, 0, sizeof(di->di_reserved)); |
e9bd2b3b WC |
814 | |
815 | set_buffer_uptodate(dibh); | |
b96ca4fa | 816 | |
e9bd2b3b | 817 | *bhp = dibh; |
b3b94faa DT |
818 | } |
819 | ||
820 | static int make_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl, | |
629a21e7 | 821 | unsigned int mode, const struct gfs2_inum_host *inum, |
e9bd2b3b | 822 | const u64 *generation, dev_t dev, struct buffer_head **bhp) |
b3b94faa | 823 | { |
feaa7bba | 824 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); |
b3b94faa DT |
825 | unsigned int uid, gid; |
826 | int error; | |
827 | ||
828 | munge_mode_uid_gid(dip, &mode, &uid, &gid); | |
182fe5ab CG |
829 | if (!gfs2_alloc_get(dip)) |
830 | return -ENOMEM; | |
b3b94faa DT |
831 | |
832 | error = gfs2_quota_lock(dip, uid, gid); | |
833 | if (error) | |
834 | goto out; | |
835 | ||
836 | error = gfs2_quota_check(dip, uid, gid); | |
837 | if (error) | |
838 | goto out_quota; | |
839 | ||
feaa7bba | 840 | error = gfs2_trans_begin(sdp, RES_DINODE + RES_QUOTA, 0); |
b3b94faa DT |
841 | if (error) |
842 | goto out_quota; | |
843 | ||
e9bd2b3b | 844 | init_dinode(dip, gl, inum, mode, uid, gid, generation, dev, bhp); |
b3b94faa | 845 | gfs2_quota_change(dip, +1, uid, gid); |
b3b94faa DT |
846 | gfs2_trans_end(sdp); |
847 | ||
feaa7bba | 848 | out_quota: |
b3b94faa | 849 | gfs2_quota_unlock(dip); |
feaa7bba | 850 | out: |
b3b94faa | 851 | gfs2_alloc_put(dip); |
b3b94faa DT |
852 | return error; |
853 | } | |
854 | ||
feaa7bba SW |
855 | static int link_dinode(struct gfs2_inode *dip, const struct qstr *name, |
856 | struct gfs2_inode *ip) | |
b3b94faa | 857 | { |
feaa7bba | 858 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); |
b3b94faa DT |
859 | struct gfs2_alloc *al; |
860 | int alloc_required; | |
861 | struct buffer_head *dibh; | |
862 | int error; | |
863 | ||
864 | al = gfs2_alloc_get(dip); | |
182fe5ab CG |
865 | if (!al) |
866 | return -ENOMEM; | |
b3b94faa DT |
867 | |
868 | error = gfs2_quota_lock(dip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE); | |
869 | if (error) | |
870 | goto fail; | |
871 | ||
feaa7bba | 872 | error = alloc_required = gfs2_diradd_alloc_required(&dip->i_inode, name); |
c752666c | 873 | if (alloc_required < 0) |
1b8177ec | 874 | goto fail_quota_locks; |
b3b94faa | 875 | if (alloc_required) { |
2933f925 | 876 | error = gfs2_quota_check(dip, dip->i_inode.i_uid, dip->i_inode.i_gid); |
b3b94faa DT |
877 | if (error) |
878 | goto fail_quota_locks; | |
879 | ||
880 | al->al_requested = sdp->sd_max_dirres; | |
881 | ||
882 | error = gfs2_inplace_reserve(dip); | |
883 | if (error) | |
884 | goto fail_quota_locks; | |
885 | ||
320dd101 | 886 | error = gfs2_trans_begin(sdp, sdp->sd_max_dirres + |
bb8d8a6f | 887 | al->al_rgd->rd_length + |
907b9bce | 888 | 2 * RES_DINODE + |
b3b94faa DT |
889 | RES_STATFS + RES_QUOTA, 0); |
890 | if (error) | |
891 | goto fail_ipreserv; | |
892 | } else { | |
feaa7bba | 893 | error = gfs2_trans_begin(sdp, RES_LEAF + 2 * RES_DINODE, 0); |
b3b94faa DT |
894 | if (error) |
895 | goto fail_quota_locks; | |
896 | } | |
897 | ||
dbb7cae2 | 898 | error = gfs2_dir_add(&dip->i_inode, name, ip, IF2DT(ip->i_inode.i_mode)); |
b3b94faa DT |
899 | if (error) |
900 | goto fail_end_trans; | |
901 | ||
902 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
903 | if (error) | |
904 | goto fail_end_trans; | |
4f56110a | 905 | ip->i_inode.i_nlink = 1; |
d4e9c4c3 | 906 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
539e5d6b | 907 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa | 908 | brelse(dibh); |
b3b94faa DT |
909 | return 0; |
910 | ||
320dd101 | 911 | fail_end_trans: |
b3b94faa DT |
912 | gfs2_trans_end(sdp); |
913 | ||
320dd101 | 914 | fail_ipreserv: |
6dbd8224 | 915 | if (dip->i_alloc->al_rgd) |
b3b94faa DT |
916 | gfs2_inplace_release(dip); |
917 | ||
320dd101 | 918 | fail_quota_locks: |
b3b94faa DT |
919 | gfs2_quota_unlock(dip); |
920 | ||
320dd101 | 921 | fail: |
b3b94faa | 922 | gfs2_alloc_put(dip); |
b3b94faa DT |
923 | return error; |
924 | } | |
925 | ||
fcb47e0b RH |
926 | static int gfs2_security_init(struct gfs2_inode *dip, struct gfs2_inode *ip) |
927 | { | |
928 | int err; | |
929 | size_t len; | |
930 | void *value; | |
931 | char *name; | |
932 | struct gfs2_ea_request er; | |
933 | ||
934 | err = security_inode_init_security(&ip->i_inode, &dip->i_inode, | |
935 | &name, &value, &len); | |
936 | ||
937 | if (err) { | |
938 | if (err == -EOPNOTSUPP) | |
939 | return 0; | |
940 | return err; | |
941 | } | |
942 | ||
943 | memset(&er, 0, sizeof(struct gfs2_ea_request)); | |
944 | ||
945 | er.er_type = GFS2_EATYPE_SECURITY; | |
946 | er.er_name = name; | |
947 | er.er_data = value; | |
948 | er.er_name_len = strlen(name); | |
949 | er.er_data_len = len; | |
950 | ||
951 | err = gfs2_ea_set_i(ip, &er); | |
952 | ||
953 | kfree(value); | |
954 | kfree(name); | |
955 | ||
956 | return err; | |
957 | } | |
958 | ||
b3b94faa DT |
959 | /** |
960 | * gfs2_createi - Create a new inode | |
961 | * @ghs: An array of two holders | |
962 | * @name: The name of the new file | |
963 | * @mode: the permissions on the new inode | |
964 | * | |
965 | * @ghs[0] is an initialized holder for the directory | |
966 | * @ghs[1] is the holder for the inode lock | |
967 | * | |
7359a19c | 968 | * If the return value is not NULL, the glocks on both the directory and the new |
b3b94faa DT |
969 | * file are held. A transaction has been started and an inplace reservation |
970 | * is held, as well. | |
971 | * | |
7359a19c | 972 | * Returns: An inode |
b3b94faa DT |
973 | */ |
974 | ||
feaa7bba | 975 | struct inode *gfs2_createi(struct gfs2_holder *ghs, const struct qstr *name, |
e7f14f4d | 976 | unsigned int mode, dev_t dev) |
b3b94faa | 977 | { |
e1cc8603 | 978 | struct inode *inode = NULL; |
5c676f6d | 979 | struct gfs2_inode *dip = ghs->gh_gl->gl_object; |
feaa7bba SW |
980 | struct inode *dir = &dip->i_inode; |
981 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); | |
dbb7cae2 | 982 | struct gfs2_inum_host inum = { .no_addr = 0, .no_formal_ino = 0 }; |
b3b94faa | 983 | int error; |
4340fe62 | 984 | u64 generation; |
f91a0d3e | 985 | struct buffer_head *bh = NULL; |
b3b94faa DT |
986 | |
987 | if (!name->len || name->len > GFS2_FNAMESIZE) | |
7359a19c | 988 | return ERR_PTR(-ENAMETOOLONG); |
b3b94faa | 989 | |
b3b94faa DT |
990 | gfs2_holder_reinit(LM_ST_EXCLUSIVE, 0, ghs); |
991 | error = gfs2_glock_nq(ghs); | |
992 | if (error) | |
993 | goto fail; | |
994 | ||
995 | error = create_ok(dip, name, mode); | |
996 | if (error) | |
997 | goto fail_gunlock; | |
998 | ||
feaa7bba | 999 | error = pick_formal_ino(sdp, &inum.no_formal_ino); |
b3b94faa DT |
1000 | if (error) |
1001 | goto fail_gunlock; | |
1002 | ||
dbb7cae2 | 1003 | error = alloc_dinode(dip, &inum.no_addr, &generation); |
b3b94faa DT |
1004 | if (error) |
1005 | goto fail_gunlock; | |
1006 | ||
28626e20 SW |
1007 | error = gfs2_glock_nq_num(sdp, inum.no_addr, &gfs2_inode_glops, |
1008 | LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1); | |
1009 | if (error) | |
1010 | goto fail_gunlock; | |
b3b94faa | 1011 | |
e9bd2b3b | 1012 | error = make_dinode(dip, ghs[1].gh_gl, mode, &inum, &generation, dev, &bh); |
b3b94faa DT |
1013 | if (error) |
1014 | goto fail_gunlock2; | |
1015 | ||
bb9bcf06 WC |
1016 | inode = gfs2_inode_lookup(dir->i_sb, IF2DT(mode), |
1017 | inum.no_addr, | |
7a9f53b3 | 1018 | inum.no_formal_ino, 0); |
feaa7bba | 1019 | if (IS_ERR(inode)) |
b3b94faa DT |
1020 | goto fail_gunlock2; |
1021 | ||
feaa7bba | 1022 | error = gfs2_inode_refresh(GFS2_I(inode)); |
b3b94faa | 1023 | if (error) |
e1cc8603 | 1024 | goto fail_gunlock2; |
b3b94faa | 1025 | |
feaa7bba | 1026 | error = gfs2_acl_create(dip, GFS2_I(inode)); |
b3b94faa | 1027 | if (error) |
e1cc8603 | 1028 | goto fail_gunlock2; |
b3b94faa | 1029 | |
fcb47e0b RH |
1030 | error = gfs2_security_init(dip, GFS2_I(inode)); |
1031 | if (error) | |
e1cc8603 | 1032 | goto fail_gunlock2; |
fcb47e0b | 1033 | |
feaa7bba | 1034 | error = link_dinode(dip, name, GFS2_I(inode)); |
b3b94faa | 1035 | if (error) |
e1cc8603 | 1036 | goto fail_gunlock2; |
b3b94faa | 1037 | |
f91a0d3e SW |
1038 | if (bh) |
1039 | brelse(bh); | |
7359a19c | 1040 | return inode; |
b3b94faa | 1041 | |
320dd101 | 1042 | fail_gunlock2: |
b3b94faa | 1043 | gfs2_glock_dq_uninit(ghs + 1); |
bd1eb881 | 1044 | if (inode && !IS_ERR(inode)) |
e1cc8603 | 1045 | iput(inode); |
320dd101 | 1046 | fail_gunlock: |
b3b94faa | 1047 | gfs2_glock_dq(ghs); |
320dd101 | 1048 | fail: |
f91a0d3e SW |
1049 | if (bh) |
1050 | brelse(bh); | |
7359a19c | 1051 | return ERR_PTR(error); |
b3b94faa DT |
1052 | } |
1053 | ||
b3b94faa DT |
1054 | /** |
1055 | * gfs2_rmdiri - Remove a directory | |
1056 | * @dip: The parent directory of the directory to be removed | |
1057 | * @name: The name of the directory to be removed | |
1058 | * @ip: The GFS2 inode of the directory to be removed | |
1059 | * | |
1060 | * Assumes Glocks on dip and ip are held | |
1061 | * | |
1062 | * Returns: errno | |
1063 | */ | |
1064 | ||
feaa7bba SW |
1065 | int gfs2_rmdiri(struct gfs2_inode *dip, const struct qstr *name, |
1066 | struct gfs2_inode *ip) | |
b3b94faa | 1067 | { |
b3b94faa DT |
1068 | struct qstr dotname; |
1069 | int error; | |
1070 | ||
1071 | if (ip->i_di.di_entries != 2) { | |
1072 | if (gfs2_consist_inode(ip)) | |
4cc14f0b | 1073 | gfs2_dinode_print(ip); |
b3b94faa DT |
1074 | return -EIO; |
1075 | } | |
1076 | ||
1077 | error = gfs2_dir_del(dip, name); | |
1078 | if (error) | |
1079 | return error; | |
1080 | ||
1081 | error = gfs2_change_nlink(dip, -1); | |
1082 | if (error) | |
1083 | return error; | |
1084 | ||
71b86f56 | 1085 | gfs2_str2qstr(&dotname, "."); |
b3b94faa DT |
1086 | error = gfs2_dir_del(ip, &dotname); |
1087 | if (error) | |
1088 | return error; | |
1089 | ||
feaa7bba | 1090 | gfs2_str2qstr(&dotname, ".."); |
b3b94faa DT |
1091 | error = gfs2_dir_del(ip, &dotname); |
1092 | if (error) | |
1093 | return error; | |
1094 | ||
4f56110a SW |
1095 | /* It looks odd, but it really should be done twice */ |
1096 | error = gfs2_change_nlink(ip, -1); | |
1097 | if (error) | |
1098 | return error; | |
1099 | ||
1100 | error = gfs2_change_nlink(ip, -1); | |
b3b94faa DT |
1101 | if (error) |
1102 | return error; | |
1103 | ||
b3b94faa DT |
1104 | return error; |
1105 | } | |
1106 | ||
1107 | /* | |
1108 | * gfs2_unlink_ok - check to see that a inode is still in a directory | |
1109 | * @dip: the directory | |
1110 | * @name: the name of the file | |
1111 | * @ip: the inode | |
1112 | * | |
1113 | * Assumes that the lock on (at least) @dip is held. | |
1114 | * | |
1115 | * Returns: 0 if the parent/child relationship is correct, errno if it isn't | |
1116 | */ | |
1117 | ||
feaa7bba | 1118 | int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name, |
dbb7cae2 | 1119 | const struct gfs2_inode *ip) |
b3b94faa | 1120 | { |
b3b94faa DT |
1121 | int error; |
1122 | ||
feaa7bba | 1123 | if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode)) |
b3b94faa DT |
1124 | return -EPERM; |
1125 | ||
b60623c2 | 1126 | if ((dip->i_inode.i_mode & S_ISVTX) && |
3de7be33 DH |
1127 | dip->i_inode.i_uid != current_fsuid() && |
1128 | ip->i_inode.i_uid != current_fsuid() && !capable(CAP_FOWNER)) | |
b3b94faa DT |
1129 | return -EPERM; |
1130 | ||
feaa7bba | 1131 | if (IS_APPEND(&dip->i_inode)) |
b3b94faa DT |
1132 | return -EPERM; |
1133 | ||
f58ba889 | 1134 | error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC); |
b3b94faa DT |
1135 | if (error) |
1136 | return error; | |
1137 | ||
dbb7cae2 | 1138 | error = gfs2_dir_check(&dip->i_inode, name, ip); |
b3b94faa DT |
1139 | if (error) |
1140 | return error; | |
1141 | ||
b3b94faa DT |
1142 | return 0; |
1143 | } | |
1144 | ||
b3b94faa DT |
1145 | /** |
1146 | * gfs2_readlinki - return the contents of a symlink | |
1147 | * @ip: the symlink's inode | |
1148 | * @buf: a pointer to the buffer to be filled | |
1149 | * @len: a pointer to the length of @buf | |
1150 | * | |
1151 | * If @buf is too small, a piece of memory is kmalloc()ed and needs | |
1152 | * to be freed by the caller. | |
1153 | * | |
1154 | * Returns: errno | |
1155 | */ | |
1156 | ||
1157 | int gfs2_readlinki(struct gfs2_inode *ip, char **buf, unsigned int *len) | |
1158 | { | |
1159 | struct gfs2_holder i_gh; | |
1160 | struct buffer_head *dibh; | |
1161 | unsigned int x; | |
1162 | int error; | |
1163 | ||
719ee344 SW |
1164 | gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh); |
1165 | error = gfs2_glock_nq(&i_gh); | |
b3b94faa DT |
1166 | if (error) { |
1167 | gfs2_holder_uninit(&i_gh); | |
1168 | return error; | |
1169 | } | |
1170 | ||
1171 | if (!ip->i_di.di_size) { | |
1172 | gfs2_consist_inode(ip); | |
1173 | error = -EIO; | |
1174 | goto out; | |
1175 | } | |
1176 | ||
1177 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1178 | if (error) | |
1179 | goto out; | |
1180 | ||
1181 | x = ip->i_di.di_size + 1; | |
1182 | if (x > *len) { | |
16c5f06f | 1183 | *buf = kmalloc(x, GFP_NOFS); |
b3b94faa DT |
1184 | if (!*buf) { |
1185 | error = -ENOMEM; | |
1186 | goto out_brelse; | |
1187 | } | |
1188 | } | |
1189 | ||
1190 | memcpy(*buf, dibh->b_data + sizeof(struct gfs2_dinode), x); | |
1191 | *len = x; | |
1192 | ||
feaa7bba | 1193 | out_brelse: |
b3b94faa | 1194 | brelse(dibh); |
feaa7bba | 1195 | out: |
b3b94faa | 1196 | gfs2_glock_dq_uninit(&i_gh); |
b3b94faa DT |
1197 | return error; |
1198 | } | |
1199 | ||
b3b94faa DT |
1200 | static int |
1201 | __gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr) | |
1202 | { | |
1203 | struct buffer_head *dibh; | |
1204 | int error; | |
1205 | ||
1206 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1207 | if (!error) { | |
feaa7bba SW |
1208 | error = inode_setattr(&ip->i_inode, attr); |
1209 | gfs2_assert_warn(GFS2_SB(&ip->i_inode), !error); | |
d4e9c4c3 | 1210 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
539e5d6b | 1211 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa DT |
1212 | brelse(dibh); |
1213 | } | |
1214 | return error; | |
1215 | } | |
1216 | ||
1217 | /** | |
1218 | * gfs2_setattr_simple - | |
1219 | * @ip: | |
1220 | * @attr: | |
1221 | * | |
1222 | * Called with a reference on the vnode. | |
1223 | * | |
1224 | * Returns: errno | |
1225 | */ | |
1226 | ||
1227 | int gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr) | |
1228 | { | |
1229 | int error; | |
1230 | ||
5c676f6d | 1231 | if (current->journal_info) |
b3b94faa DT |
1232 | return __gfs2_setattr_simple(ip, attr); |
1233 | ||
feaa7bba | 1234 | error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE, 0); |
b3b94faa DT |
1235 | if (error) |
1236 | return error; | |
1237 | ||
1238 | error = __gfs2_setattr_simple(ip, attr); | |
feaa7bba | 1239 | gfs2_trans_end(GFS2_SB(&ip->i_inode)); |
b3b94faa DT |
1240 | return error; |
1241 | } | |
1242 | ||
bb8d8a6f SW |
1243 | void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf) |
1244 | { | |
1245 | const struct gfs2_dinode_host *di = &ip->i_di; | |
1246 | struct gfs2_dinode *str = buf; | |
1247 | ||
1248 | str->di_header.mh_magic = cpu_to_be32(GFS2_MAGIC); | |
1249 | str->di_header.mh_type = cpu_to_be32(GFS2_METATYPE_DI); | |
1250 | str->di_header.__pad0 = 0; | |
1251 | str->di_header.mh_format = cpu_to_be32(GFS2_FORMAT_DI); | |
1252 | str->di_header.__pad1 = 0; | |
1253 | str->di_num.no_addr = cpu_to_be64(ip->i_no_addr); | |
1254 | str->di_num.no_formal_ino = cpu_to_be64(ip->i_no_formal_ino); | |
1255 | str->di_mode = cpu_to_be32(ip->i_inode.i_mode); | |
1256 | str->di_uid = cpu_to_be32(ip->i_inode.i_uid); | |
1257 | str->di_gid = cpu_to_be32(ip->i_inode.i_gid); | |
1258 | str->di_nlink = cpu_to_be32(ip->i_inode.i_nlink); | |
1259 | str->di_size = cpu_to_be64(di->di_size); | |
77658aad | 1260 | str->di_blocks = cpu_to_be64(gfs2_get_inode_blocks(&ip->i_inode)); |
bb8d8a6f SW |
1261 | str->di_atime = cpu_to_be64(ip->i_inode.i_atime.tv_sec); |
1262 | str->di_mtime = cpu_to_be64(ip->i_inode.i_mtime.tv_sec); | |
1263 | str->di_ctime = cpu_to_be64(ip->i_inode.i_ctime.tv_sec); | |
1264 | ||
ce276b06 SW |
1265 | str->di_goal_meta = cpu_to_be64(ip->i_goal); |
1266 | str->di_goal_data = cpu_to_be64(ip->i_goal); | |
bb8d8a6f SW |
1267 | str->di_generation = cpu_to_be64(di->di_generation); |
1268 | ||
1269 | str->di_flags = cpu_to_be32(di->di_flags); | |
ecc30c79 | 1270 | str->di_height = cpu_to_be16(ip->i_height); |
bb8d8a6f SW |
1271 | str->di_payload_format = cpu_to_be32(S_ISDIR(ip->i_inode.i_mode) && |
1272 | !(ip->i_di.di_flags & GFS2_DIF_EXHASH) ? | |
1273 | GFS2_FORMAT_DE : 0); | |
9a004508 | 1274 | str->di_depth = cpu_to_be16(ip->i_depth); |
bb8d8a6f SW |
1275 | str->di_entries = cpu_to_be32(di->di_entries); |
1276 | ||
1277 | str->di_eattr = cpu_to_be64(di->di_eattr); | |
4bd91ba1 SW |
1278 | str->di_atime_nsec = cpu_to_be32(ip->i_inode.i_atime.tv_nsec); |
1279 | str->di_mtime_nsec = cpu_to_be32(ip->i_inode.i_mtime.tv_nsec); | |
1280 | str->di_ctime_nsec = cpu_to_be32(ip->i_inode.i_ctime.tv_nsec); | |
bb8d8a6f SW |
1281 | } |
1282 | ||
1283 | void gfs2_dinode_print(const struct gfs2_inode *ip) | |
1284 | { | |
1285 | const struct gfs2_dinode_host *di = &ip->i_di; | |
1286 | ||
1287 | printk(KERN_INFO " no_formal_ino = %llu\n", | |
1288 | (unsigned long long)ip->i_no_formal_ino); | |
1289 | printk(KERN_INFO " no_addr = %llu\n", | |
1290 | (unsigned long long)ip->i_no_addr); | |
1291 | printk(KERN_INFO " di_size = %llu\n", (unsigned long long)di->di_size); | |
77658aad SW |
1292 | printk(KERN_INFO " blocks = %llu\n", |
1293 | (unsigned long long)gfs2_get_inode_blocks(&ip->i_inode)); | |
ce276b06 SW |
1294 | printk(KERN_INFO " i_goal = %llu\n", |
1295 | (unsigned long long)ip->i_goal); | |
bb8d8a6f | 1296 | printk(KERN_INFO " di_flags = 0x%.8X\n", di->di_flags); |
ca390601 | 1297 | printk(KERN_INFO " i_height = %u\n", ip->i_height); |
9a004508 | 1298 | printk(KERN_INFO " i_depth = %u\n", ip->i_depth); |
bb8d8a6f SW |
1299 | printk(KERN_INFO " di_entries = %u\n", di->di_entries); |
1300 | printk(KERN_INFO " di_eattr = %llu\n", | |
1301 | (unsigned long long)di->di_eattr); | |
1302 | } | |
1303 |