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 "quota.h" |
36 | #include "rgrp.h" | |
37 | #include "trans.h" | |
5c676f6d | 38 | #include "util.h" |
b3b94faa | 39 | |
bb8d8a6f SW |
40 | struct gfs2_inum_range_host { |
41 | u64 ir_start; | |
42 | u64 ir_length; | |
43 | }; | |
44 | ||
feaa7bba SW |
45 | static int iget_test(struct inode *inode, void *opaque) |
46 | { | |
47 | struct gfs2_inode *ip = GFS2_I(inode); | |
dbb7cae2 | 48 | u64 *no_addr = opaque; |
feaa7bba | 49 | |
091806ed | 50 | if (ip->i_no_addr == *no_addr && test_bit(GIF_USER, &ip->i_flags)) |
feaa7bba | 51 | return 1; |
b3b94faa | 52 | |
feaa7bba SW |
53 | return 0; |
54 | } | |
55 | ||
56 | static int iget_set(struct inode *inode, void *opaque) | |
b3b94faa | 57 | { |
feaa7bba | 58 | struct gfs2_inode *ip = GFS2_I(inode); |
dbb7cae2 | 59 | u64 *no_addr = opaque; |
b3b94faa | 60 | |
dbb7cae2 SW |
61 | inode->i_ino = (unsigned long)*no_addr; |
62 | ip->i_no_addr = *no_addr; | |
091806ed | 63 | set_bit(GIF_USER, &ip->i_flags); |
feaa7bba SW |
64 | return 0; |
65 | } | |
b3b94faa | 66 | |
dbb7cae2 | 67 | struct inode *gfs2_ilookup(struct super_block *sb, u64 no_addr) |
feaa7bba | 68 | { |
dbb7cae2 SW |
69 | unsigned long hash = (unsigned long)no_addr; |
70 | return ilookup5(sb, hash, iget_test, &no_addr); | |
feaa7bba | 71 | } |
b3b94faa | 72 | |
dbb7cae2 | 73 | static struct inode *gfs2_iget(struct super_block *sb, u64 no_addr) |
feaa7bba | 74 | { |
dbb7cae2 SW |
75 | unsigned long hash = (unsigned long)no_addr; |
76 | return iget5_locked(sb, hash, iget_test, iget_set, &no_addr); | |
b3b94faa DT |
77 | } |
78 | ||
7a9f53b3 BM |
79 | struct gfs2_skip_data { |
80 | u64 no_addr; | |
81 | int skipped; | |
82 | }; | |
83 | ||
84 | static int iget_skip_test(struct inode *inode, void *opaque) | |
85 | { | |
86 | struct gfs2_inode *ip = GFS2_I(inode); | |
87 | struct gfs2_skip_data *data = opaque; | |
88 | ||
091806ed | 89 | if (ip->i_no_addr == data->no_addr && test_bit(GIF_USER, &ip->i_flags)){ |
7a9f53b3 BM |
90 | if (inode->i_state & (I_FREEING|I_CLEAR|I_WILL_FREE)){ |
91 | data->skipped = 1; | |
92 | return 0; | |
93 | } | |
94 | return 1; | |
95 | } | |
96 | return 0; | |
97 | } | |
98 | ||
99 | static int iget_skip_set(struct inode *inode, void *opaque) | |
100 | { | |
101 | struct gfs2_inode *ip = GFS2_I(inode); | |
102 | struct gfs2_skip_data *data = opaque; | |
103 | ||
104 | if (data->skipped) | |
105 | return 1; | |
106 | inode->i_ino = (unsigned long)(data->no_addr); | |
107 | ip->i_no_addr = data->no_addr; | |
091806ed | 108 | set_bit(GIF_USER, &ip->i_flags); |
7a9f53b3 BM |
109 | return 0; |
110 | } | |
111 | ||
112 | static struct inode *gfs2_iget_skip(struct super_block *sb, | |
113 | u64 no_addr) | |
114 | { | |
115 | struct gfs2_skip_data data; | |
116 | unsigned long hash = (unsigned long)no_addr; | |
117 | ||
118 | data.no_addr = no_addr; | |
119 | data.skipped = 0; | |
120 | return iget5_locked(sb, hash, iget_skip_test, iget_skip_set, &data); | |
121 | } | |
122 | ||
35dcc52e WC |
123 | /** |
124 | * GFS2 lookup code fills in vfs inode contents based on info obtained | |
125 | * from directory entry inside gfs2_inode_lookup(). This has caused issues | |
126 | * with NFS code path since its get_dentry routine doesn't have the relevant | |
127 | * directory entry when gfs2_inode_lookup() is invoked. Part of the code | |
128 | * segment inside gfs2_inode_lookup code needs to get moved around. | |
129 | * | |
130 | * Clean up I_LOCK and I_NEW as well. | |
131 | **/ | |
132 | ||
133 | void gfs2_set_iop(struct inode *inode) | |
134 | { | |
c97bfe43 | 135 | struct gfs2_sbd *sdp = GFS2_SB(inode); |
35dcc52e WC |
136 | umode_t mode = inode->i_mode; |
137 | ||
138 | if (S_ISREG(mode)) { | |
139 | inode->i_op = &gfs2_file_iops; | |
c97bfe43 WC |
140 | if (sdp->sd_args.ar_localflocks) |
141 | inode->i_fop = &gfs2_file_fops_nolock; | |
142 | else | |
143 | inode->i_fop = &gfs2_file_fops; | |
35dcc52e WC |
144 | } else if (S_ISDIR(mode)) { |
145 | inode->i_op = &gfs2_dir_iops; | |
c97bfe43 WC |
146 | if (sdp->sd_args.ar_localflocks) |
147 | inode->i_fop = &gfs2_dir_fops_nolock; | |
148 | else | |
149 | inode->i_fop = &gfs2_dir_fops; | |
35dcc52e WC |
150 | } else if (S_ISLNK(mode)) { |
151 | inode->i_op = &gfs2_symlink_iops; | |
152 | } else { | |
d83225d4 | 153 | inode->i_op = &gfs2_file_iops; |
43a33c53 | 154 | init_special_inode(inode, inode->i_mode, inode->i_rdev); |
35dcc52e WC |
155 | } |
156 | ||
157 | unlock_new_inode(inode); | |
158 | } | |
159 | ||
b3b94faa | 160 | /** |
feaa7bba SW |
161 | * gfs2_inode_lookup - Lookup an inode |
162 | * @sb: The super block | |
dbb7cae2 | 163 | * @no_addr: The inode number |
feaa7bba | 164 | * @type: The type of the inode |
7a9f53b3 | 165 | * @skip_freeing: set this not return an inode if it is currently being freed. |
b3b94faa | 166 | * |
feaa7bba | 167 | * Returns: A VFS inode, or an error |
b3b94faa DT |
168 | */ |
169 | ||
091806ed | 170 | struct inode *gfs2_inode_lookup(struct super_block *sb, |
bb9bcf06 WC |
171 | unsigned int type, |
172 | u64 no_addr, | |
7a9f53b3 | 173 | u64 no_formal_ino, int skip_freeing) |
b3b94faa | 174 | { |
7a9f53b3 BM |
175 | struct inode *inode; |
176 | struct gfs2_inode *ip; | |
feaa7bba SW |
177 | struct gfs2_glock *io_gl; |
178 | int error; | |
b3b94faa | 179 | |
7a9f53b3 BM |
180 | if (skip_freeing) |
181 | inode = gfs2_iget_skip(sb, no_addr); | |
182 | else | |
183 | inode = gfs2_iget(sb, no_addr); | |
184 | ip = GFS2_I(inode); | |
185 | ||
26d83ded SW |
186 | if (!inode) |
187 | return ERR_PTR(-ENOBUFS); | |
188 | ||
feaa7bba SW |
189 | if (inode->i_state & I_NEW) { |
190 | struct gfs2_sbd *sdp = GFS2_SB(inode); | |
bb9bcf06 | 191 | ip->i_no_formal_ino = no_formal_ino; |
b3b94faa | 192 | |
dbb7cae2 | 193 | error = gfs2_glock_get(sdp, no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl); |
feaa7bba SW |
194 | if (unlikely(error)) |
195 | goto fail; | |
196 | ip->i_gl->gl_object = ip; | |
b3b94faa | 197 | |
dbb7cae2 | 198 | error = gfs2_glock_get(sdp, no_addr, &gfs2_iopen_glops, CREATE, &io_gl); |
feaa7bba SW |
199 | if (unlikely(error)) |
200 | goto fail_put; | |
b3b94faa | 201 | |
bfded27b | 202 | set_bit(GIF_INVALID, &ip->i_flags); |
feaa7bba SW |
203 | error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh); |
204 | if (unlikely(error)) | |
205 | goto fail_iopen; | |
d93cfa98 | 206 | ip->i_iopen_gh.gh_gl->gl_object = ip; |
b3b94faa | 207 | |
feaa7bba | 208 | gfs2_glock_put(io_gl); |
c8cdf479 | 209 | |
35dcc52e WC |
210 | if ((type == DT_UNKNOWN) && (no_formal_ino == 0)) |
211 | goto gfs2_nfsbypass; | |
212 | ||
213 | inode->i_mode = DT2IF(type); | |
214 | ||
c8cdf479 SW |
215 | /* |
216 | * We must read the inode in order to work out its type in | |
217 | * this case. Note that this doesn't happen often as we normally | |
218 | * know the type beforehand. This code path only occurs during | |
219 | * unlinked inode recovery (where it is safe to do this glock, | |
220 | * which is not true in the general case). | |
221 | */ | |
c8cdf479 SW |
222 | if (type == DT_UNKNOWN) { |
223 | struct gfs2_holder gh; | |
224 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); | |
225 | if (unlikely(error)) | |
226 | goto fail_glock; | |
227 | /* Inode is now uptodate */ | |
c8cdf479 SW |
228 | gfs2_glock_dq_uninit(&gh); |
229 | } | |
230 | ||
35dcc52e | 231 | gfs2_set_iop(inode); |
feaa7bba | 232 | } |
b3b94faa | 233 | |
35dcc52e | 234 | gfs2_nfsbypass: |
b3b94faa | 235 | return inode; |
c8cdf479 SW |
236 | fail_glock: |
237 | gfs2_glock_dq(&ip->i_iopen_gh); | |
feaa7bba SW |
238 | fail_iopen: |
239 | gfs2_glock_put(io_gl); | |
240 | fail_put: | |
241 | ip->i_gl->gl_object = NULL; | |
242 | gfs2_glock_put(ip->i_gl); | |
243 | fail: | |
69840b0d | 244 | iget_failed(inode); |
feaa7bba | 245 | return ERR_PTR(error); |
b3b94faa DT |
246 | } |
247 | ||
af339c02 | 248 | static int gfs2_dinode_in(struct gfs2_inode *ip, const void *buf) |
ea744d01 | 249 | { |
ea744d01 | 250 | const struct gfs2_dinode *str = buf; |
719ee344 | 251 | struct timespec atime; |
9a004508 | 252 | u16 height, depth; |
ea744d01 | 253 | |
ecc30c79 SW |
254 | if (unlikely(ip->i_no_addr != be64_to_cpu(str->di_num.no_addr))) |
255 | goto corrupt; | |
dbb7cae2 | 256 | ip->i_no_formal_ino = be64_to_cpu(str->di_num.no_formal_ino); |
b60623c2 | 257 | ip->i_inode.i_mode = be32_to_cpu(str->di_mode); |
e7f14f4d | 258 | ip->i_inode.i_rdev = 0; |
b60623c2 | 259 | switch (ip->i_inode.i_mode & S_IFMT) { |
e7f14f4d SW |
260 | case S_IFBLK: |
261 | case S_IFCHR: | |
262 | ip->i_inode.i_rdev = MKDEV(be32_to_cpu(str->di_major), | |
263 | be32_to_cpu(str->di_minor)); | |
264 | break; | |
265 | }; | |
266 | ||
2933f925 SW |
267 | ip->i_inode.i_uid = be32_to_cpu(str->di_uid); |
268 | ip->i_inode.i_gid = be32_to_cpu(str->di_gid); | |
4f56110a SW |
269 | /* |
270 | * We will need to review setting the nlink count here in the | |
271 | * light of the forthcoming ro bind mount work. This is a reminder | |
272 | * to do that. | |
273 | */ | |
274 | ip->i_inode.i_nlink = be32_to_cpu(str->di_nlink); | |
c9e98886 SW |
275 | ip->i_disksize = be64_to_cpu(str->di_size); |
276 | i_size_write(&ip->i_inode, ip->i_disksize); | |
77658aad | 277 | gfs2_set_inode_blocks(&ip->i_inode, be64_to_cpu(str->di_blocks)); |
719ee344 SW |
278 | atime.tv_sec = be64_to_cpu(str->di_atime); |
279 | atime.tv_nsec = be32_to_cpu(str->di_atime_nsec); | |
280 | if (timespec_compare(&ip->i_inode.i_atime, &atime) < 0) | |
281 | ip->i_inode.i_atime = atime; | |
1a7b1eed | 282 | ip->i_inode.i_mtime.tv_sec = be64_to_cpu(str->di_mtime); |
4bd91ba1 | 283 | ip->i_inode.i_mtime.tv_nsec = be32_to_cpu(str->di_mtime_nsec); |
1a7b1eed | 284 | ip->i_inode.i_ctime.tv_sec = be64_to_cpu(str->di_ctime); |
4bd91ba1 | 285 | ip->i_inode.i_ctime.tv_nsec = be32_to_cpu(str->di_ctime_nsec); |
ea744d01 | 286 | |
ce276b06 | 287 | ip->i_goal = be64_to_cpu(str->di_goal_meta); |
bcf0b5b3 | 288 | ip->i_generation = be64_to_cpu(str->di_generation); |
ea744d01 | 289 | |
383f01fb | 290 | ip->i_diskflags = be32_to_cpu(str->di_flags); |
6b124d8d | 291 | gfs2_set_inode_flags(&ip->i_inode); |
ecc30c79 SW |
292 | height = be16_to_cpu(str->di_height); |
293 | if (unlikely(height > GFS2_MAX_META_HEIGHT)) | |
294 | goto corrupt; | |
295 | ip->i_height = (u8)height; | |
ea744d01 | 296 | |
9a004508 SW |
297 | depth = be16_to_cpu(str->di_depth); |
298 | if (unlikely(depth > GFS2_DIR_MAX_DEPTH)) | |
299 | goto corrupt; | |
300 | ip->i_depth = (u8)depth; | |
ad6203f2 | 301 | ip->i_entries = be32_to_cpu(str->di_entries); |
ea744d01 | 302 | |
3767ac21 | 303 | ip->i_eattr = be64_to_cpu(str->di_eattr); |
5561093e SW |
304 | if (S_ISREG(ip->i_inode.i_mode)) |
305 | gfs2_set_aops(&ip->i_inode); | |
306 | ||
af339c02 | 307 | return 0; |
ecc30c79 SW |
308 | corrupt: |
309 | if (gfs2_consist_inode(ip)) | |
310 | gfs2_dinode_print(ip); | |
311 | return -EIO; | |
ea744d01 SW |
312 | } |
313 | ||
b3b94faa DT |
314 | /** |
315 | * gfs2_inode_refresh - Refresh the incore copy of the dinode | |
316 | * @ip: The GFS2 inode | |
317 | * | |
318 | * Returns: errno | |
319 | */ | |
320 | ||
321 | int gfs2_inode_refresh(struct gfs2_inode *ip) | |
322 | { | |
323 | struct buffer_head *dibh; | |
324 | int error; | |
325 | ||
326 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
327 | if (error) | |
328 | return error; | |
329 | ||
feaa7bba | 330 | if (gfs2_metatype_check(GFS2_SB(&ip->i_inode), dibh, GFS2_METATYPE_DI)) { |
b3b94faa DT |
331 | brelse(dibh); |
332 | return -EIO; | |
333 | } | |
334 | ||
af339c02 | 335 | error = gfs2_dinode_in(ip, dibh->b_data); |
b3b94faa | 336 | brelse(dibh); |
bfded27b | 337 | clear_bit(GIF_INVALID, &ip->i_flags); |
b3b94faa | 338 | |
af339c02 | 339 | return error; |
b3b94faa DT |
340 | } |
341 | ||
feaa7bba | 342 | int gfs2_dinode_dealloc(struct gfs2_inode *ip) |
b3b94faa | 343 | { |
feaa7bba | 344 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa DT |
345 | struct gfs2_alloc *al; |
346 | struct gfs2_rgrpd *rgd; | |
347 | int error; | |
348 | ||
77658aad | 349 | if (gfs2_get_inode_blocks(&ip->i_inode) != 1) { |
b3b94faa | 350 | if (gfs2_consist_inode(ip)) |
4cc14f0b | 351 | gfs2_dinode_print(ip); |
b3b94faa DT |
352 | return -EIO; |
353 | } | |
354 | ||
355 | al = gfs2_alloc_get(ip); | |
182fe5ab CG |
356 | if (!al) |
357 | return -ENOMEM; | |
b3b94faa DT |
358 | |
359 | error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE); | |
360 | if (error) | |
361 | goto out; | |
362 | ||
363 | error = gfs2_rindex_hold(sdp, &al->al_ri_gh); | |
364 | if (error) | |
365 | goto out_qs; | |
366 | ||
dbb7cae2 | 367 | rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr); |
b3b94faa DT |
368 | if (!rgd) { |
369 | gfs2_consist_inode(ip); | |
370 | error = -EIO; | |
371 | goto out_rindex_relse; | |
372 | } | |
373 | ||
374 | error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, | |
375 | &al->al_rgd_gh); | |
376 | if (error) | |
377 | goto out_rindex_relse; | |
378 | ||
420b9e5e | 379 | error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_STATFS + RES_QUOTA, 1); |
b3b94faa DT |
380 | if (error) |
381 | goto out_rg_gunlock; | |
382 | ||
2bcd610d SW |
383 | set_bit(GLF_DIRTY, &ip->i_gl->gl_flags); |
384 | set_bit(GLF_LFLUSH, &ip->i_gl->gl_flags); | |
b3b94faa DT |
385 | |
386 | gfs2_free_di(rgd, ip); | |
387 | ||
b3b94faa | 388 | gfs2_trans_end(sdp); |
b3b94faa | 389 | |
feaa7bba | 390 | out_rg_gunlock: |
b3b94faa | 391 | gfs2_glock_dq_uninit(&al->al_rgd_gh); |
feaa7bba | 392 | out_rindex_relse: |
b3b94faa | 393 | gfs2_glock_dq_uninit(&al->al_ri_gh); |
feaa7bba | 394 | out_qs: |
b3b94faa | 395 | gfs2_quota_unhold(ip); |
36327521 | 396 | out: |
feaa7bba | 397 | gfs2_alloc_put(ip); |
b3b94faa DT |
398 | return error; |
399 | } | |
400 | ||
b3b94faa | 401 | /** |
87d21e07 | 402 | * gfs2_change_nlink - Change nlink count on inode |
b3b94faa DT |
403 | * @ip: The GFS2 inode |
404 | * @diff: The change in the nlink count required | |
405 | * | |
406 | * Returns: errno | |
407 | */ | |
87d21e07 | 408 | int gfs2_change_nlink(struct gfs2_inode *ip, int diff) |
b3b94faa DT |
409 | { |
410 | struct buffer_head *dibh; | |
cd915493 | 411 | u32 nlink; |
b3b94faa DT |
412 | int error; |
413 | ||
4f56110a SW |
414 | BUG_ON(diff != 1 && diff != -1); |
415 | nlink = ip->i_inode.i_nlink + diff; | |
b3b94faa DT |
416 | |
417 | /* If we are reducing the nlink count, but the new value ends up being | |
418 | bigger than the old one, we must have underflowed. */ | |
4f56110a | 419 | if (diff < 0 && nlink > ip->i_inode.i_nlink) { |
b3b94faa | 420 | if (gfs2_consist_inode(ip)) |
4cc14f0b | 421 | gfs2_dinode_print(ip); |
b3b94faa DT |
422 | return -EIO; |
423 | } | |
424 | ||
425 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
426 | if (error) | |
427 | return error; | |
428 | ||
4f56110a SW |
429 | if (diff > 0) |
430 | inc_nlink(&ip->i_inode); | |
431 | else | |
432 | drop_nlink(&ip->i_inode); | |
433 | ||
4bd91ba1 | 434 | ip->i_inode.i_ctime = CURRENT_TIME; |
b3b94faa | 435 | |
d4e9c4c3 | 436 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
539e5d6b | 437 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa | 438 | brelse(dibh); |
feaa7bba | 439 | mark_inode_dirty(&ip->i_inode); |
b3b94faa | 440 | |
87d21e07 | 441 | if (ip->i_inode.i_nlink == 0) |
ddee7608 | 442 | gfs2_unlink_di(&ip->i_inode); /* mark inode unlinked */ |
87d21e07 | 443 | |
5509826f WC |
444 | return error; |
445 | } | |
446 | ||
c752666c SW |
447 | struct inode *gfs2_lookup_simple(struct inode *dip, const char *name) |
448 | { | |
449 | struct qstr qstr; | |
6c93fd1e | 450 | struct inode *inode; |
71b86f56 | 451 | gfs2_str2qstr(&qstr, name); |
a569c711 | 452 | inode = gfs2_lookupi(dip, &qstr, 1); |
6c93fd1e RC |
453 | /* gfs2_lookupi has inconsistent callers: vfs |
454 | * related routines expect NULL for no entry found, | |
455 | * gfs2_lookup_simple callers expect ENOENT | |
456 | * and do not check for NULL. | |
457 | */ | |
458 | if (inode == NULL) | |
459 | return ERR_PTR(-ENOENT); | |
460 | else | |
461 | return inode; | |
c752666c SW |
462 | } |
463 | ||
464 | ||
b3b94faa DT |
465 | /** |
466 | * gfs2_lookupi - Look up a filename in a directory and return its inode | |
467 | * @d_gh: An initialized holder for the directory glock | |
468 | * @name: The name of the inode to look for | |
469 | * @is_root: If 1, ignore the caller's permissions | |
470 | * @i_gh: An uninitialized holder for the new inode glock | |
471 | * | |
d7c103d0 SW |
472 | * This can be called via the VFS filldir function when NFS is doing |
473 | * a readdirplus and the inode which its intending to stat isn't | |
474 | * already in cache. In this case we must not take the directory glock | |
475 | * again, since the readdir call will have already taken that lock. | |
b3b94faa DT |
476 | * |
477 | * Returns: errno | |
478 | */ | |
479 | ||
feaa7bba | 480 | struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name, |
a569c711 | 481 | int is_root) |
b3b94faa | 482 | { |
c9fd4307 | 483 | struct super_block *sb = dir->i_sb; |
feaa7bba | 484 | struct gfs2_inode *dip = GFS2_I(dir); |
b3b94faa | 485 | struct gfs2_holder d_gh; |
037bcbb7 | 486 | int error = 0; |
c752666c | 487 | struct inode *inode = NULL; |
d7c103d0 | 488 | int unlock = 0; |
b3b94faa DT |
489 | |
490 | if (!name->len || name->len > GFS2_FNAMESIZE) | |
c752666c | 491 | return ERR_PTR(-ENAMETOOLONG); |
b3b94faa | 492 | |
c752666c SW |
493 | if ((name->len == 1 && memcmp(name->name, ".", 1) == 0) || |
494 | (name->len == 2 && memcmp(name->name, "..", 2) == 0 && | |
495 | dir == sb->s_root->d_inode)) { | |
320dd101 SW |
496 | igrab(dir); |
497 | return dir; | |
b3b94faa DT |
498 | } |
499 | ||
7afd88d9 | 500 | if (gfs2_glock_is_locked_by_me(dip->i_gl) == NULL) { |
d7c103d0 SW |
501 | error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh); |
502 | if (error) | |
503 | return ERR_PTR(error); | |
504 | unlock = 1; | |
505 | } | |
b3b94faa DT |
506 | |
507 | if (!is_root) { | |
f58ba889 | 508 | error = gfs2_permission(dir, MAY_EXEC); |
b3b94faa DT |
509 | if (error) |
510 | goto out; | |
511 | } | |
512 | ||
dbb7cae2 SW |
513 | inode = gfs2_dir_search(dir, name); |
514 | if (IS_ERR(inode)) | |
515 | error = PTR_ERR(inode); | |
7359a19c | 516 | out: |
d7c103d0 SW |
517 | if (unlock) |
518 | gfs2_glock_dq_uninit(&d_gh); | |
c752666c SW |
519 | if (error == -ENOENT) |
520 | return NULL; | |
d7c103d0 | 521 | return inode ? inode : ERR_PTR(error); |
b3b94faa DT |
522 | } |
523 | ||
bb8d8a6f SW |
524 | static void gfs2_inum_range_in(struct gfs2_inum_range_host *ir, const void *buf) |
525 | { | |
526 | const struct gfs2_inum_range *str = buf; | |
527 | ||
528 | ir->ir_start = be64_to_cpu(str->ir_start); | |
529 | ir->ir_length = be64_to_cpu(str->ir_length); | |
530 | } | |
531 | ||
532 | static void gfs2_inum_range_out(const struct gfs2_inum_range_host *ir, void *buf) | |
533 | { | |
534 | struct gfs2_inum_range *str = buf; | |
535 | ||
536 | str->ir_start = cpu_to_be64(ir->ir_start); | |
537 | str->ir_length = cpu_to_be64(ir->ir_length); | |
538 | } | |
539 | ||
cd915493 | 540 | static int pick_formal_ino_1(struct gfs2_sbd *sdp, u64 *formal_ino) |
b3b94faa | 541 | { |
feaa7bba | 542 | struct gfs2_inode *ip = GFS2_I(sdp->sd_ir_inode); |
b3b94faa | 543 | struct buffer_head *bh; |
e6972647 | 544 | struct gfs2_inum_range_host ir; |
b3b94faa DT |
545 | int error; |
546 | ||
547 | error = gfs2_trans_begin(sdp, RES_DINODE, 0); | |
548 | if (error) | |
549 | return error; | |
f55ab26a | 550 | mutex_lock(&sdp->sd_inum_mutex); |
b3b94faa DT |
551 | |
552 | error = gfs2_meta_inode_buffer(ip, &bh); | |
553 | if (error) { | |
f55ab26a | 554 | mutex_unlock(&sdp->sd_inum_mutex); |
b3b94faa DT |
555 | gfs2_trans_end(sdp); |
556 | return error; | |
557 | } | |
558 | ||
559 | gfs2_inum_range_in(&ir, bh->b_data + sizeof(struct gfs2_dinode)); | |
560 | ||
561 | if (ir.ir_length) { | |
562 | *formal_ino = ir.ir_start++; | |
563 | ir.ir_length--; | |
d4e9c4c3 | 564 | gfs2_trans_add_bh(ip->i_gl, bh, 1); |
b3b94faa DT |
565 | gfs2_inum_range_out(&ir, |
566 | bh->b_data + sizeof(struct gfs2_dinode)); | |
567 | brelse(bh); | |
f55ab26a | 568 | mutex_unlock(&sdp->sd_inum_mutex); |
b3b94faa DT |
569 | gfs2_trans_end(sdp); |
570 | return 0; | |
571 | } | |
572 | ||
573 | brelse(bh); | |
574 | ||
f55ab26a | 575 | mutex_unlock(&sdp->sd_inum_mutex); |
b3b94faa DT |
576 | gfs2_trans_end(sdp); |
577 | ||
578 | return 1; | |
579 | } | |
580 | ||
cd915493 | 581 | static int pick_formal_ino_2(struct gfs2_sbd *sdp, u64 *formal_ino) |
b3b94faa | 582 | { |
feaa7bba SW |
583 | struct gfs2_inode *ip = GFS2_I(sdp->sd_ir_inode); |
584 | struct gfs2_inode *m_ip = GFS2_I(sdp->sd_inum_inode); | |
b3b94faa DT |
585 | struct gfs2_holder gh; |
586 | struct buffer_head *bh; | |
e6972647 | 587 | struct gfs2_inum_range_host ir; |
b3b94faa DT |
588 | int error; |
589 | ||
590 | error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); | |
591 | if (error) | |
592 | return error; | |
593 | ||
594 | error = gfs2_trans_begin(sdp, 2 * RES_DINODE, 0); | |
595 | if (error) | |
596 | goto out; | |
f55ab26a | 597 | mutex_lock(&sdp->sd_inum_mutex); |
b3b94faa DT |
598 | |
599 | error = gfs2_meta_inode_buffer(ip, &bh); | |
600 | if (error) | |
601 | goto out_end_trans; | |
907b9bce | 602 | |
b3b94faa DT |
603 | gfs2_inum_range_in(&ir, bh->b_data + sizeof(struct gfs2_dinode)); |
604 | ||
605 | if (!ir.ir_length) { | |
606 | struct buffer_head *m_bh; | |
cd915493 | 607 | u64 x, y; |
b44b84d7 | 608 | __be64 z; |
b3b94faa DT |
609 | |
610 | error = gfs2_meta_inode_buffer(m_ip, &m_bh); | |
611 | if (error) | |
612 | goto out_brelse; | |
613 | ||
b44b84d7 AV |
614 | z = *(__be64 *)(m_bh->b_data + sizeof(struct gfs2_dinode)); |
615 | x = y = be64_to_cpu(z); | |
b3b94faa DT |
616 | ir.ir_start = x; |
617 | ir.ir_length = GFS2_INUM_QUANTUM; | |
618 | x += GFS2_INUM_QUANTUM; | |
619 | if (x < y) | |
620 | gfs2_consist_inode(m_ip); | |
b44b84d7 | 621 | z = cpu_to_be64(x); |
d4e9c4c3 | 622 | gfs2_trans_add_bh(m_ip->i_gl, m_bh, 1); |
b44b84d7 | 623 | *(__be64 *)(m_bh->b_data + sizeof(struct gfs2_dinode)) = z; |
b3b94faa DT |
624 | |
625 | brelse(m_bh); | |
626 | } | |
627 | ||
628 | *formal_ino = ir.ir_start++; | |
629 | ir.ir_length--; | |
630 | ||
d4e9c4c3 | 631 | gfs2_trans_add_bh(ip->i_gl, bh, 1); |
b3b94faa DT |
632 | gfs2_inum_range_out(&ir, bh->b_data + sizeof(struct gfs2_dinode)); |
633 | ||
420b9e5e | 634 | out_brelse: |
b3b94faa | 635 | brelse(bh); |
420b9e5e | 636 | out_end_trans: |
f55ab26a | 637 | mutex_unlock(&sdp->sd_inum_mutex); |
b3b94faa | 638 | gfs2_trans_end(sdp); |
420b9e5e | 639 | out: |
b3b94faa | 640 | gfs2_glock_dq_uninit(&gh); |
b3b94faa DT |
641 | return error; |
642 | } | |
643 | ||
cd915493 | 644 | static int pick_formal_ino(struct gfs2_sbd *sdp, u64 *inum) |
b3b94faa DT |
645 | { |
646 | int error; | |
647 | ||
648 | error = pick_formal_ino_1(sdp, inum); | |
649 | if (error <= 0) | |
650 | return error; | |
651 | ||
652 | error = pick_formal_ino_2(sdp, inum); | |
653 | ||
654 | return error; | |
655 | } | |
656 | ||
657 | /** | |
658 | * create_ok - OK to create a new on-disk inode here? | |
659 | * @dip: Directory in which dinode is to be created | |
660 | * @name: Name of new dinode | |
661 | * @mode: | |
662 | * | |
663 | * Returns: errno | |
664 | */ | |
665 | ||
feaa7bba | 666 | static int create_ok(struct gfs2_inode *dip, const struct qstr *name, |
b3b94faa DT |
667 | unsigned int mode) |
668 | { | |
669 | int error; | |
670 | ||
f58ba889 | 671 | error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC); |
b3b94faa DT |
672 | if (error) |
673 | return error; | |
674 | ||
675 | /* Don't create entries in an unlinked directory */ | |
4f56110a | 676 | if (!dip->i_inode.i_nlink) |
b3b94faa DT |
677 | return -EPERM; |
678 | ||
dbb7cae2 | 679 | error = gfs2_dir_check(&dip->i_inode, name, NULL); |
b3b94faa DT |
680 | switch (error) { |
681 | case -ENOENT: | |
682 | error = 0; | |
683 | break; | |
684 | case 0: | |
685 | return -EEXIST; | |
686 | default: | |
687 | return error; | |
688 | } | |
689 | ||
ad6203f2 | 690 | if (dip->i_entries == (u32)-1) |
b3b94faa | 691 | return -EFBIG; |
4f56110a | 692 | if (S_ISDIR(mode) && dip->i_inode.i_nlink == (u32)-1) |
b3b94faa DT |
693 | return -EMLINK; |
694 | ||
695 | return 0; | |
696 | } | |
697 | ||
698 | static void munge_mode_uid_gid(struct gfs2_inode *dip, unsigned int *mode, | |
699 | unsigned int *uid, unsigned int *gid) | |
700 | { | |
feaa7bba | 701 | if (GFS2_SB(&dip->i_inode)->sd_args.ar_suiddir && |
2933f925 | 702 | (dip->i_inode.i_mode & S_ISUID) && dip->i_inode.i_uid) { |
b3b94faa DT |
703 | if (S_ISDIR(*mode)) |
704 | *mode |= S_ISUID; | |
3de7be33 | 705 | else if (dip->i_inode.i_uid != current_fsuid()) |
b3b94faa | 706 | *mode &= ~07111; |
2933f925 | 707 | *uid = dip->i_inode.i_uid; |
b3b94faa | 708 | } else |
3de7be33 | 709 | *uid = current_fsuid(); |
b3b94faa | 710 | |
b60623c2 | 711 | if (dip->i_inode.i_mode & S_ISGID) { |
b3b94faa DT |
712 | if (S_ISDIR(*mode)) |
713 | *mode |= S_ISGID; | |
2933f925 | 714 | *gid = dip->i_inode.i_gid; |
b3b94faa | 715 | } else |
3de7be33 | 716 | *gid = current_fsgid(); |
b3b94faa DT |
717 | } |
718 | ||
dbb7cae2 | 719 | static int alloc_dinode(struct gfs2_inode *dip, u64 *no_addr, u64 *generation) |
b3b94faa | 720 | { |
feaa7bba | 721 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); |
b3b94faa DT |
722 | int error; |
723 | ||
6dbd8224 SW |
724 | if (gfs2_alloc_get(dip) == NULL) |
725 | return -ENOMEM; | |
b3b94faa | 726 | |
6dbd8224 | 727 | dip->i_alloc->al_requested = RES_DINODE; |
b3b94faa DT |
728 | error = gfs2_inplace_reserve(dip); |
729 | if (error) | |
730 | goto out; | |
731 | ||
feaa7bba | 732 | error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_STATFS, 0); |
b3b94faa DT |
733 | if (error) |
734 | goto out_ipreserv; | |
735 | ||
dbb7cae2 | 736 | *no_addr = gfs2_alloc_di(dip, generation); |
b3b94faa DT |
737 | |
738 | gfs2_trans_end(sdp); | |
739 | ||
4340fe62 | 740 | out_ipreserv: |
b3b94faa | 741 | gfs2_inplace_release(dip); |
4340fe62 | 742 | out: |
b3b94faa | 743 | gfs2_alloc_put(dip); |
b3b94faa DT |
744 | return error; |
745 | } | |
746 | ||
747 | /** | |
748 | * init_dinode - Fill in a new dinode structure | |
749 | * @dip: the directory this inode is being created in | |
750 | * @gl: The glock covering the new inode | |
751 | * @inum: the inode number | |
752 | * @mode: the file permissions | |
753 | * @uid: | |
754 | * @gid: | |
755 | * | |
756 | */ | |
757 | ||
758 | static void init_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl, | |
629a21e7 | 759 | const struct gfs2_inum_host *inum, unsigned int mode, |
4340fe62 | 760 | unsigned int uid, unsigned int gid, |
e9bd2b3b | 761 | const u64 *generation, dev_t dev, struct buffer_head **bhp) |
b3b94faa | 762 | { |
feaa7bba | 763 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); |
b96ca4fa | 764 | struct gfs2_dinode *di; |
b3b94faa | 765 | struct buffer_head *dibh; |
4bd91ba1 | 766 | struct timespec tv = CURRENT_TIME; |
b3b94faa DT |
767 | |
768 | dibh = gfs2_meta_new(gl, inum->no_addr); | |
d4e9c4c3 | 769 | gfs2_trans_add_bh(gl, dibh, 1); |
b3b94faa DT |
770 | gfs2_metatype_set(dibh, GFS2_METATYPE_DI, GFS2_FORMAT_DI); |
771 | gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode)); | |
b96ca4fa SW |
772 | di = (struct gfs2_dinode *)dibh->b_data; |
773 | ||
2442a098 SW |
774 | di->di_num.no_formal_ino = cpu_to_be64(inum->no_formal_ino); |
775 | di->di_num.no_addr = cpu_to_be64(inum->no_addr); | |
b96ca4fa SW |
776 | di->di_mode = cpu_to_be32(mode); |
777 | di->di_uid = cpu_to_be32(uid); | |
778 | di->di_gid = cpu_to_be32(gid); | |
294caaa3 SW |
779 | di->di_nlink = 0; |
780 | di->di_size = 0; | |
b96ca4fa | 781 | di->di_blocks = cpu_to_be64(1); |
4bd91ba1 | 782 | di->di_atime = di->di_mtime = di->di_ctime = cpu_to_be64(tv.tv_sec); |
e7f14f4d SW |
783 | di->di_major = cpu_to_be32(MAJOR(dev)); |
784 | di->di_minor = cpu_to_be32(MINOR(dev)); | |
b96ca4fa | 785 | di->di_goal_meta = di->di_goal_data = cpu_to_be64(inum->no_addr); |
4340fe62 | 786 | di->di_generation = cpu_to_be64(*generation); |
294caaa3 | 787 | di->di_flags = 0; |
b3b94faa DT |
788 | |
789 | if (S_ISREG(mode)) { | |
383f01fb | 790 | if ((dip->i_diskflags & GFS2_DIF_INHERIT_JDATA) || |
b3b94faa | 791 | gfs2_tune_get(sdp, gt_new_files_jdata)) |
b96ca4fa | 792 | di->di_flags |= cpu_to_be32(GFS2_DIF_JDATA); |
b3b94faa | 793 | } else if (S_ISDIR(mode)) { |
383f01fb | 794 | di->di_flags |= cpu_to_be32(dip->i_diskflags & |
568f4c96 | 795 | GFS2_DIF_INHERIT_JDATA); |
b3b94faa DT |
796 | } |
797 | ||
b96ca4fa | 798 | di->__pad1 = 0; |
a9583c79 | 799 | di->di_payload_format = cpu_to_be32(S_ISDIR(mode) ? GFS2_FORMAT_DE : 0); |
294caaa3 | 800 | di->di_height = 0; |
b96ca4fa SW |
801 | di->__pad2 = 0; |
802 | di->__pad3 = 0; | |
294caaa3 SW |
803 | di->di_depth = 0; |
804 | di->di_entries = 0; | |
b96ca4fa | 805 | memset(&di->__pad4, 0, sizeof(di->__pad4)); |
294caaa3 | 806 | di->di_eattr = 0; |
4bd91ba1 SW |
807 | di->di_atime_nsec = cpu_to_be32(tv.tv_nsec); |
808 | di->di_mtime_nsec = cpu_to_be32(tv.tv_nsec); | |
809 | di->di_ctime_nsec = cpu_to_be32(tv.tv_nsec); | |
b96ca4fa | 810 | memset(&di->di_reserved, 0, sizeof(di->di_reserved)); |
e9bd2b3b WC |
811 | |
812 | set_buffer_uptodate(dibh); | |
b96ca4fa | 813 | |
e9bd2b3b | 814 | *bhp = dibh; |
b3b94faa DT |
815 | } |
816 | ||
817 | static int make_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl, | |
629a21e7 | 818 | unsigned int mode, const struct gfs2_inum_host *inum, |
e9bd2b3b | 819 | const u64 *generation, dev_t dev, struct buffer_head **bhp) |
b3b94faa | 820 | { |
feaa7bba | 821 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); |
b3b94faa DT |
822 | unsigned int uid, gid; |
823 | int error; | |
824 | ||
825 | munge_mode_uid_gid(dip, &mode, &uid, &gid); | |
182fe5ab CG |
826 | if (!gfs2_alloc_get(dip)) |
827 | return -ENOMEM; | |
b3b94faa DT |
828 | |
829 | error = gfs2_quota_lock(dip, uid, gid); | |
830 | if (error) | |
831 | goto out; | |
832 | ||
833 | error = gfs2_quota_check(dip, uid, gid); | |
834 | if (error) | |
835 | goto out_quota; | |
836 | ||
feaa7bba | 837 | error = gfs2_trans_begin(sdp, RES_DINODE + RES_QUOTA, 0); |
b3b94faa DT |
838 | if (error) |
839 | goto out_quota; | |
840 | ||
e9bd2b3b | 841 | init_dinode(dip, gl, inum, mode, uid, gid, generation, dev, bhp); |
b3b94faa | 842 | gfs2_quota_change(dip, +1, uid, gid); |
b3b94faa DT |
843 | gfs2_trans_end(sdp); |
844 | ||
feaa7bba | 845 | out_quota: |
b3b94faa | 846 | gfs2_quota_unlock(dip); |
feaa7bba | 847 | out: |
b3b94faa | 848 | gfs2_alloc_put(dip); |
b3b94faa DT |
849 | return error; |
850 | } | |
851 | ||
feaa7bba SW |
852 | static int link_dinode(struct gfs2_inode *dip, const struct qstr *name, |
853 | struct gfs2_inode *ip) | |
b3b94faa | 854 | { |
feaa7bba | 855 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); |
b3b94faa DT |
856 | struct gfs2_alloc *al; |
857 | int alloc_required; | |
858 | struct buffer_head *dibh; | |
859 | int error; | |
860 | ||
861 | al = gfs2_alloc_get(dip); | |
182fe5ab CG |
862 | if (!al) |
863 | return -ENOMEM; | |
b3b94faa DT |
864 | |
865 | error = gfs2_quota_lock(dip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE); | |
866 | if (error) | |
867 | goto fail; | |
868 | ||
feaa7bba | 869 | error = alloc_required = gfs2_diradd_alloc_required(&dip->i_inode, name); |
c752666c | 870 | if (alloc_required < 0) |
1b8177ec | 871 | goto fail_quota_locks; |
b3b94faa | 872 | if (alloc_required) { |
2933f925 | 873 | error = gfs2_quota_check(dip, dip->i_inode.i_uid, dip->i_inode.i_gid); |
b3b94faa DT |
874 | if (error) |
875 | goto fail_quota_locks; | |
876 | ||
877 | al->al_requested = sdp->sd_max_dirres; | |
878 | ||
879 | error = gfs2_inplace_reserve(dip); | |
880 | if (error) | |
881 | goto fail_quota_locks; | |
882 | ||
320dd101 | 883 | error = gfs2_trans_begin(sdp, sdp->sd_max_dirres + |
bb8d8a6f | 884 | al->al_rgd->rd_length + |
907b9bce | 885 | 2 * RES_DINODE + |
b3b94faa DT |
886 | RES_STATFS + RES_QUOTA, 0); |
887 | if (error) | |
888 | goto fail_ipreserv; | |
889 | } else { | |
feaa7bba | 890 | error = gfs2_trans_begin(sdp, RES_LEAF + 2 * RES_DINODE, 0); |
b3b94faa DT |
891 | if (error) |
892 | goto fail_quota_locks; | |
893 | } | |
894 | ||
dbb7cae2 | 895 | error = gfs2_dir_add(&dip->i_inode, name, ip, IF2DT(ip->i_inode.i_mode)); |
b3b94faa DT |
896 | if (error) |
897 | goto fail_end_trans; | |
898 | ||
899 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
900 | if (error) | |
901 | goto fail_end_trans; | |
4f56110a | 902 | ip->i_inode.i_nlink = 1; |
d4e9c4c3 | 903 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
539e5d6b | 904 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa | 905 | brelse(dibh); |
b3b94faa DT |
906 | return 0; |
907 | ||
320dd101 | 908 | fail_end_trans: |
b3b94faa DT |
909 | gfs2_trans_end(sdp); |
910 | ||
320dd101 | 911 | fail_ipreserv: |
6dbd8224 | 912 | if (dip->i_alloc->al_rgd) |
b3b94faa DT |
913 | gfs2_inplace_release(dip); |
914 | ||
320dd101 | 915 | fail_quota_locks: |
b3b94faa DT |
916 | gfs2_quota_unlock(dip); |
917 | ||
320dd101 | 918 | fail: |
b3b94faa | 919 | gfs2_alloc_put(dip); |
b3b94faa DT |
920 | return error; |
921 | } | |
922 | ||
fcb47e0b RH |
923 | static int gfs2_security_init(struct gfs2_inode *dip, struct gfs2_inode *ip) |
924 | { | |
925 | int err; | |
926 | size_t len; | |
927 | void *value; | |
928 | char *name; | |
929 | struct gfs2_ea_request er; | |
930 | ||
931 | err = security_inode_init_security(&ip->i_inode, &dip->i_inode, | |
932 | &name, &value, &len); | |
933 | ||
934 | if (err) { | |
935 | if (err == -EOPNOTSUPP) | |
936 | return 0; | |
937 | return err; | |
938 | } | |
939 | ||
940 | memset(&er, 0, sizeof(struct gfs2_ea_request)); | |
941 | ||
942 | er.er_type = GFS2_EATYPE_SECURITY; | |
943 | er.er_name = name; | |
944 | er.er_data = value; | |
945 | er.er_name_len = strlen(name); | |
946 | er.er_data_len = len; | |
947 | ||
948 | err = gfs2_ea_set_i(ip, &er); | |
949 | ||
950 | kfree(value); | |
951 | kfree(name); | |
952 | ||
953 | return err; | |
954 | } | |
955 | ||
b3b94faa DT |
956 | /** |
957 | * gfs2_createi - Create a new inode | |
958 | * @ghs: An array of two holders | |
959 | * @name: The name of the new file | |
960 | * @mode: the permissions on the new inode | |
961 | * | |
962 | * @ghs[0] is an initialized holder for the directory | |
963 | * @ghs[1] is the holder for the inode lock | |
964 | * | |
7359a19c | 965 | * If the return value is not NULL, the glocks on both the directory and the new |
b3b94faa DT |
966 | * file are held. A transaction has been started and an inplace reservation |
967 | * is held, as well. | |
968 | * | |
7359a19c | 969 | * Returns: An inode |
b3b94faa DT |
970 | */ |
971 | ||
feaa7bba | 972 | struct inode *gfs2_createi(struct gfs2_holder *ghs, const struct qstr *name, |
e7f14f4d | 973 | unsigned int mode, dev_t dev) |
b3b94faa | 974 | { |
e1cc8603 | 975 | struct inode *inode = NULL; |
5c676f6d | 976 | struct gfs2_inode *dip = ghs->gh_gl->gl_object; |
feaa7bba SW |
977 | struct inode *dir = &dip->i_inode; |
978 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); | |
dbb7cae2 | 979 | struct gfs2_inum_host inum = { .no_addr = 0, .no_formal_ino = 0 }; |
b3b94faa | 980 | int error; |
4340fe62 | 981 | u64 generation; |
f91a0d3e | 982 | struct buffer_head *bh = NULL; |
b3b94faa DT |
983 | |
984 | if (!name->len || name->len > GFS2_FNAMESIZE) | |
7359a19c | 985 | return ERR_PTR(-ENAMETOOLONG); |
b3b94faa | 986 | |
b3b94faa DT |
987 | gfs2_holder_reinit(LM_ST_EXCLUSIVE, 0, ghs); |
988 | error = gfs2_glock_nq(ghs); | |
989 | if (error) | |
990 | goto fail; | |
991 | ||
992 | error = create_ok(dip, name, mode); | |
993 | if (error) | |
994 | goto fail_gunlock; | |
995 | ||
feaa7bba | 996 | error = pick_formal_ino(sdp, &inum.no_formal_ino); |
b3b94faa DT |
997 | if (error) |
998 | goto fail_gunlock; | |
999 | ||
dbb7cae2 | 1000 | error = alloc_dinode(dip, &inum.no_addr, &generation); |
b3b94faa DT |
1001 | if (error) |
1002 | goto fail_gunlock; | |
1003 | ||
28626e20 SW |
1004 | error = gfs2_glock_nq_num(sdp, inum.no_addr, &gfs2_inode_glops, |
1005 | LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1); | |
1006 | if (error) | |
1007 | goto fail_gunlock; | |
b3b94faa | 1008 | |
e9bd2b3b | 1009 | error = make_dinode(dip, ghs[1].gh_gl, mode, &inum, &generation, dev, &bh); |
b3b94faa DT |
1010 | if (error) |
1011 | goto fail_gunlock2; | |
1012 | ||
bb9bcf06 WC |
1013 | inode = gfs2_inode_lookup(dir->i_sb, IF2DT(mode), |
1014 | inum.no_addr, | |
7a9f53b3 | 1015 | inum.no_formal_ino, 0); |
feaa7bba | 1016 | if (IS_ERR(inode)) |
b3b94faa DT |
1017 | goto fail_gunlock2; |
1018 | ||
feaa7bba | 1019 | error = gfs2_inode_refresh(GFS2_I(inode)); |
b3b94faa | 1020 | if (error) |
e1cc8603 | 1021 | goto fail_gunlock2; |
b3b94faa | 1022 | |
feaa7bba | 1023 | error = gfs2_acl_create(dip, GFS2_I(inode)); |
b3b94faa | 1024 | if (error) |
e1cc8603 | 1025 | goto fail_gunlock2; |
b3b94faa | 1026 | |
fcb47e0b RH |
1027 | error = gfs2_security_init(dip, GFS2_I(inode)); |
1028 | if (error) | |
e1cc8603 | 1029 | goto fail_gunlock2; |
fcb47e0b | 1030 | |
feaa7bba | 1031 | error = link_dinode(dip, name, GFS2_I(inode)); |
b3b94faa | 1032 | if (error) |
e1cc8603 | 1033 | goto fail_gunlock2; |
b3b94faa | 1034 | |
f91a0d3e SW |
1035 | if (bh) |
1036 | brelse(bh); | |
7359a19c | 1037 | return inode; |
b3b94faa | 1038 | |
320dd101 | 1039 | fail_gunlock2: |
b3b94faa | 1040 | gfs2_glock_dq_uninit(ghs + 1); |
bd1eb881 | 1041 | if (inode && !IS_ERR(inode)) |
e1cc8603 | 1042 | iput(inode); |
320dd101 | 1043 | fail_gunlock: |
b3b94faa | 1044 | gfs2_glock_dq(ghs); |
320dd101 | 1045 | fail: |
f91a0d3e SW |
1046 | if (bh) |
1047 | brelse(bh); | |
7359a19c | 1048 | return ERR_PTR(error); |
b3b94faa DT |
1049 | } |
1050 | ||
b3b94faa DT |
1051 | /** |
1052 | * gfs2_rmdiri - Remove a directory | |
1053 | * @dip: The parent directory of the directory to be removed | |
1054 | * @name: The name of the directory to be removed | |
1055 | * @ip: The GFS2 inode of the directory to be removed | |
1056 | * | |
1057 | * Assumes Glocks on dip and ip are held | |
1058 | * | |
1059 | * Returns: errno | |
1060 | */ | |
1061 | ||
feaa7bba SW |
1062 | int gfs2_rmdiri(struct gfs2_inode *dip, const struct qstr *name, |
1063 | struct gfs2_inode *ip) | |
b3b94faa | 1064 | { |
b3b94faa DT |
1065 | struct qstr dotname; |
1066 | int error; | |
1067 | ||
ad6203f2 | 1068 | if (ip->i_entries != 2) { |
b3b94faa | 1069 | if (gfs2_consist_inode(ip)) |
4cc14f0b | 1070 | gfs2_dinode_print(ip); |
b3b94faa DT |
1071 | return -EIO; |
1072 | } | |
1073 | ||
1074 | error = gfs2_dir_del(dip, name); | |
1075 | if (error) | |
1076 | return error; | |
1077 | ||
1078 | error = gfs2_change_nlink(dip, -1); | |
1079 | if (error) | |
1080 | return error; | |
1081 | ||
71b86f56 | 1082 | gfs2_str2qstr(&dotname, "."); |
b3b94faa DT |
1083 | error = gfs2_dir_del(ip, &dotname); |
1084 | if (error) | |
1085 | return error; | |
1086 | ||
feaa7bba | 1087 | gfs2_str2qstr(&dotname, ".."); |
b3b94faa DT |
1088 | error = gfs2_dir_del(ip, &dotname); |
1089 | if (error) | |
1090 | return error; | |
1091 | ||
4f56110a SW |
1092 | /* It looks odd, but it really should be done twice */ |
1093 | error = gfs2_change_nlink(ip, -1); | |
1094 | if (error) | |
1095 | return error; | |
1096 | ||
1097 | error = gfs2_change_nlink(ip, -1); | |
b3b94faa DT |
1098 | if (error) |
1099 | return error; | |
1100 | ||
b3b94faa DT |
1101 | return error; |
1102 | } | |
1103 | ||
1104 | /* | |
1105 | * gfs2_unlink_ok - check to see that a inode is still in a directory | |
1106 | * @dip: the directory | |
1107 | * @name: the name of the file | |
1108 | * @ip: the inode | |
1109 | * | |
1110 | * Assumes that the lock on (at least) @dip is held. | |
1111 | * | |
1112 | * Returns: 0 if the parent/child relationship is correct, errno if it isn't | |
1113 | */ | |
1114 | ||
feaa7bba | 1115 | int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name, |
dbb7cae2 | 1116 | const struct gfs2_inode *ip) |
b3b94faa | 1117 | { |
b3b94faa DT |
1118 | int error; |
1119 | ||
feaa7bba | 1120 | if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode)) |
b3b94faa DT |
1121 | return -EPERM; |
1122 | ||
b60623c2 | 1123 | if ((dip->i_inode.i_mode & S_ISVTX) && |
3de7be33 DH |
1124 | dip->i_inode.i_uid != current_fsuid() && |
1125 | ip->i_inode.i_uid != current_fsuid() && !capable(CAP_FOWNER)) | |
b3b94faa DT |
1126 | return -EPERM; |
1127 | ||
feaa7bba | 1128 | if (IS_APPEND(&dip->i_inode)) |
b3b94faa DT |
1129 | return -EPERM; |
1130 | ||
f58ba889 | 1131 | error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC); |
b3b94faa DT |
1132 | if (error) |
1133 | return error; | |
1134 | ||
dbb7cae2 | 1135 | error = gfs2_dir_check(&dip->i_inode, name, ip); |
b3b94faa DT |
1136 | if (error) |
1137 | return error; | |
1138 | ||
b3b94faa DT |
1139 | return 0; |
1140 | } | |
1141 | ||
b3b94faa DT |
1142 | /** |
1143 | * gfs2_readlinki - return the contents of a symlink | |
1144 | * @ip: the symlink's inode | |
1145 | * @buf: a pointer to the buffer to be filled | |
1146 | * @len: a pointer to the length of @buf | |
1147 | * | |
1148 | * If @buf is too small, a piece of memory is kmalloc()ed and needs | |
1149 | * to be freed by the caller. | |
1150 | * | |
1151 | * Returns: errno | |
1152 | */ | |
1153 | ||
1154 | int gfs2_readlinki(struct gfs2_inode *ip, char **buf, unsigned int *len) | |
1155 | { | |
1156 | struct gfs2_holder i_gh; | |
1157 | struct buffer_head *dibh; | |
1158 | unsigned int x; | |
1159 | int error; | |
1160 | ||
719ee344 SW |
1161 | gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh); |
1162 | error = gfs2_glock_nq(&i_gh); | |
b3b94faa DT |
1163 | if (error) { |
1164 | gfs2_holder_uninit(&i_gh); | |
1165 | return error; | |
1166 | } | |
1167 | ||
c9e98886 | 1168 | if (!ip->i_disksize) { |
b3b94faa DT |
1169 | gfs2_consist_inode(ip); |
1170 | error = -EIO; | |
1171 | goto out; | |
1172 | } | |
1173 | ||
1174 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1175 | if (error) | |
1176 | goto out; | |
1177 | ||
c9e98886 | 1178 | x = ip->i_disksize + 1; |
b3b94faa | 1179 | if (x > *len) { |
16c5f06f | 1180 | *buf = kmalloc(x, GFP_NOFS); |
b3b94faa DT |
1181 | if (!*buf) { |
1182 | error = -ENOMEM; | |
1183 | goto out_brelse; | |
1184 | } | |
1185 | } | |
1186 | ||
1187 | memcpy(*buf, dibh->b_data + sizeof(struct gfs2_dinode), x); | |
1188 | *len = x; | |
1189 | ||
feaa7bba | 1190 | out_brelse: |
b3b94faa | 1191 | brelse(dibh); |
feaa7bba | 1192 | out: |
b3b94faa | 1193 | gfs2_glock_dq_uninit(&i_gh); |
b3b94faa DT |
1194 | return error; |
1195 | } | |
1196 | ||
b3b94faa DT |
1197 | static int |
1198 | __gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr) | |
1199 | { | |
1200 | struct buffer_head *dibh; | |
1201 | int error; | |
1202 | ||
1203 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1204 | if (!error) { | |
feaa7bba SW |
1205 | error = inode_setattr(&ip->i_inode, attr); |
1206 | gfs2_assert_warn(GFS2_SB(&ip->i_inode), !error); | |
d4e9c4c3 | 1207 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
539e5d6b | 1208 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa DT |
1209 | brelse(dibh); |
1210 | } | |
1211 | return error; | |
1212 | } | |
1213 | ||
1214 | /** | |
1215 | * gfs2_setattr_simple - | |
1216 | * @ip: | |
1217 | * @attr: | |
1218 | * | |
1219 | * Called with a reference on the vnode. | |
1220 | * | |
1221 | * Returns: errno | |
1222 | */ | |
1223 | ||
1224 | int gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr) | |
1225 | { | |
1226 | int error; | |
1227 | ||
5c676f6d | 1228 | if (current->journal_info) |
b3b94faa DT |
1229 | return __gfs2_setattr_simple(ip, attr); |
1230 | ||
feaa7bba | 1231 | error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE, 0); |
b3b94faa DT |
1232 | if (error) |
1233 | return error; | |
1234 | ||
1235 | error = __gfs2_setattr_simple(ip, attr); | |
feaa7bba | 1236 | gfs2_trans_end(GFS2_SB(&ip->i_inode)); |
b3b94faa DT |
1237 | return error; |
1238 | } | |
1239 | ||
bb8d8a6f SW |
1240 | void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf) |
1241 | { | |
bb8d8a6f SW |
1242 | struct gfs2_dinode *str = buf; |
1243 | ||
1244 | str->di_header.mh_magic = cpu_to_be32(GFS2_MAGIC); | |
1245 | str->di_header.mh_type = cpu_to_be32(GFS2_METATYPE_DI); | |
1246 | str->di_header.__pad0 = 0; | |
1247 | str->di_header.mh_format = cpu_to_be32(GFS2_FORMAT_DI); | |
1248 | str->di_header.__pad1 = 0; | |
1249 | str->di_num.no_addr = cpu_to_be64(ip->i_no_addr); | |
1250 | str->di_num.no_formal_ino = cpu_to_be64(ip->i_no_formal_ino); | |
1251 | str->di_mode = cpu_to_be32(ip->i_inode.i_mode); | |
1252 | str->di_uid = cpu_to_be32(ip->i_inode.i_uid); | |
1253 | str->di_gid = cpu_to_be32(ip->i_inode.i_gid); | |
1254 | str->di_nlink = cpu_to_be32(ip->i_inode.i_nlink); | |
c9e98886 | 1255 | str->di_size = cpu_to_be64(ip->i_disksize); |
77658aad | 1256 | str->di_blocks = cpu_to_be64(gfs2_get_inode_blocks(&ip->i_inode)); |
bb8d8a6f SW |
1257 | str->di_atime = cpu_to_be64(ip->i_inode.i_atime.tv_sec); |
1258 | str->di_mtime = cpu_to_be64(ip->i_inode.i_mtime.tv_sec); | |
1259 | str->di_ctime = cpu_to_be64(ip->i_inode.i_ctime.tv_sec); | |
1260 | ||
ce276b06 SW |
1261 | str->di_goal_meta = cpu_to_be64(ip->i_goal); |
1262 | str->di_goal_data = cpu_to_be64(ip->i_goal); | |
bcf0b5b3 | 1263 | str->di_generation = cpu_to_be64(ip->i_generation); |
bb8d8a6f | 1264 | |
383f01fb | 1265 | str->di_flags = cpu_to_be32(ip->i_diskflags); |
ecc30c79 | 1266 | str->di_height = cpu_to_be16(ip->i_height); |
bb8d8a6f | 1267 | str->di_payload_format = cpu_to_be32(S_ISDIR(ip->i_inode.i_mode) && |
383f01fb | 1268 | !(ip->i_diskflags & GFS2_DIF_EXHASH) ? |
bb8d8a6f | 1269 | GFS2_FORMAT_DE : 0); |
9a004508 | 1270 | str->di_depth = cpu_to_be16(ip->i_depth); |
ad6203f2 | 1271 | str->di_entries = cpu_to_be32(ip->i_entries); |
bb8d8a6f | 1272 | |
3767ac21 | 1273 | str->di_eattr = cpu_to_be64(ip->i_eattr); |
4bd91ba1 SW |
1274 | str->di_atime_nsec = cpu_to_be32(ip->i_inode.i_atime.tv_nsec); |
1275 | str->di_mtime_nsec = cpu_to_be32(ip->i_inode.i_mtime.tv_nsec); | |
1276 | str->di_ctime_nsec = cpu_to_be32(ip->i_inode.i_ctime.tv_nsec); | |
bb8d8a6f SW |
1277 | } |
1278 | ||
1279 | void gfs2_dinode_print(const struct gfs2_inode *ip) | |
1280 | { | |
bb8d8a6f SW |
1281 | printk(KERN_INFO " no_formal_ino = %llu\n", |
1282 | (unsigned long long)ip->i_no_formal_ino); | |
1283 | printk(KERN_INFO " no_addr = %llu\n", | |
1284 | (unsigned long long)ip->i_no_addr); | |
c9e98886 SW |
1285 | printk(KERN_INFO " i_disksize = %llu\n", |
1286 | (unsigned long long)ip->i_disksize); | |
77658aad SW |
1287 | printk(KERN_INFO " blocks = %llu\n", |
1288 | (unsigned long long)gfs2_get_inode_blocks(&ip->i_inode)); | |
ce276b06 SW |
1289 | printk(KERN_INFO " i_goal = %llu\n", |
1290 | (unsigned long long)ip->i_goal); | |
383f01fb | 1291 | printk(KERN_INFO " i_diskflags = 0x%.8X\n", ip->i_diskflags); |
ca390601 | 1292 | printk(KERN_INFO " i_height = %u\n", ip->i_height); |
9a004508 | 1293 | printk(KERN_INFO " i_depth = %u\n", ip->i_depth); |
ad6203f2 | 1294 | printk(KERN_INFO " i_entries = %u\n", ip->i_entries); |
3767ac21 SW |
1295 | printk(KERN_INFO " i_eattr = %llu\n", |
1296 | (unsigned long long)ip->i_eattr); | |
bb8d8a6f SW |
1297 | } |
1298 |