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Commit | Line | Data |
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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> |
fcb47e0b | 19 | #include <linux/security.h> |
719ee344 | 20 | #include <linux/time.h> |
b3b94faa DT |
21 | |
22 | #include "gfs2.h" | |
5c676f6d | 23 | #include "incore.h" |
b3b94faa DT |
24 | #include "acl.h" |
25 | #include "bmap.h" | |
26 | #include "dir.h" | |
27 | #include "eattr.h" | |
28 | #include "glock.h" | |
29 | #include "glops.h" | |
30 | #include "inode.h" | |
31 | #include "log.h" | |
32 | #include "meta_io.h" | |
33 | #include "ops_address.h" | |
b3b94faa DT |
34 | #include "quota.h" |
35 | #include "rgrp.h" | |
36 | #include "trans.h" | |
5c676f6d | 37 | #include "util.h" |
b3b94faa | 38 | |
bb8d8a6f SW |
39 | struct gfs2_inum_range_host { |
40 | u64 ir_start; | |
41 | u64 ir_length; | |
42 | }; | |
43 | ||
feaa7bba SW |
44 | static int iget_test(struct inode *inode, void *opaque) |
45 | { | |
46 | struct gfs2_inode *ip = GFS2_I(inode); | |
dbb7cae2 | 47 | u64 *no_addr = opaque; |
feaa7bba | 48 | |
091806ed | 49 | if (ip->i_no_addr == *no_addr && test_bit(GIF_USER, &ip->i_flags)) |
feaa7bba | 50 | return 1; |
b3b94faa | 51 | |
feaa7bba SW |
52 | return 0; |
53 | } | |
54 | ||
55 | static int iget_set(struct inode *inode, void *opaque) | |
b3b94faa | 56 | { |
feaa7bba | 57 | struct gfs2_inode *ip = GFS2_I(inode); |
dbb7cae2 | 58 | u64 *no_addr = opaque; |
b3b94faa | 59 | |
dbb7cae2 SW |
60 | inode->i_ino = (unsigned long)*no_addr; |
61 | ip->i_no_addr = *no_addr; | |
091806ed | 62 | set_bit(GIF_USER, &ip->i_flags); |
feaa7bba SW |
63 | return 0; |
64 | } | |
b3b94faa | 65 | |
dbb7cae2 | 66 | struct inode *gfs2_ilookup(struct super_block *sb, u64 no_addr) |
feaa7bba | 67 | { |
dbb7cae2 SW |
68 | unsigned long hash = (unsigned long)no_addr; |
69 | return ilookup5(sb, hash, iget_test, &no_addr); | |
feaa7bba | 70 | } |
b3b94faa | 71 | |
dbb7cae2 | 72 | static struct inode *gfs2_iget(struct super_block *sb, u64 no_addr) |
feaa7bba | 73 | { |
dbb7cae2 SW |
74 | unsigned long hash = (unsigned long)no_addr; |
75 | return iget5_locked(sb, hash, iget_test, iget_set, &no_addr); | |
b3b94faa DT |
76 | } |
77 | ||
7a9f53b3 BM |
78 | struct gfs2_skip_data { |
79 | u64 no_addr; | |
80 | int skipped; | |
81 | }; | |
82 | ||
83 | static int iget_skip_test(struct inode *inode, void *opaque) | |
84 | { | |
85 | struct gfs2_inode *ip = GFS2_I(inode); | |
86 | struct gfs2_skip_data *data = opaque; | |
87 | ||
091806ed | 88 | if (ip->i_no_addr == data->no_addr && test_bit(GIF_USER, &ip->i_flags)){ |
7a9f53b3 BM |
89 | if (inode->i_state & (I_FREEING|I_CLEAR|I_WILL_FREE)){ |
90 | data->skipped = 1; | |
91 | return 0; | |
92 | } | |
93 | return 1; | |
94 | } | |
95 | return 0; | |
96 | } | |
97 | ||
98 | static int iget_skip_set(struct inode *inode, void *opaque) | |
99 | { | |
100 | struct gfs2_inode *ip = GFS2_I(inode); | |
101 | struct gfs2_skip_data *data = opaque; | |
102 | ||
103 | if (data->skipped) | |
104 | return 1; | |
105 | inode->i_ino = (unsigned long)(data->no_addr); | |
106 | ip->i_no_addr = data->no_addr; | |
091806ed | 107 | set_bit(GIF_USER, &ip->i_flags); |
7a9f53b3 BM |
108 | return 0; |
109 | } | |
110 | ||
111 | static struct inode *gfs2_iget_skip(struct super_block *sb, | |
112 | u64 no_addr) | |
113 | { | |
114 | struct gfs2_skip_data data; | |
115 | unsigned long hash = (unsigned long)no_addr; | |
116 | ||
117 | data.no_addr = no_addr; | |
118 | data.skipped = 0; | |
119 | return iget5_locked(sb, hash, iget_skip_test, iget_skip_set, &data); | |
120 | } | |
121 | ||
35dcc52e WC |
122 | /** |
123 | * GFS2 lookup code fills in vfs inode contents based on info obtained | |
124 | * from directory entry inside gfs2_inode_lookup(). This has caused issues | |
125 | * with NFS code path since its get_dentry routine doesn't have the relevant | |
126 | * directory entry when gfs2_inode_lookup() is invoked. Part of the code | |
127 | * segment inside gfs2_inode_lookup code needs to get moved around. | |
128 | * | |
129 | * Clean up I_LOCK and I_NEW as well. | |
130 | **/ | |
131 | ||
132 | void gfs2_set_iop(struct inode *inode) | |
133 | { | |
c97bfe43 | 134 | struct gfs2_sbd *sdp = GFS2_SB(inode); |
35dcc52e WC |
135 | umode_t mode = inode->i_mode; |
136 | ||
137 | if (S_ISREG(mode)) { | |
138 | inode->i_op = &gfs2_file_iops; | |
f057f6cd SW |
139 | if (gfs2_localflocks(sdp)) |
140 | inode->i_fop = gfs2_file_fops_nolock; | |
c97bfe43 | 141 | else |
f057f6cd | 142 | inode->i_fop = gfs2_file_fops; |
35dcc52e WC |
143 | } else if (S_ISDIR(mode)) { |
144 | inode->i_op = &gfs2_dir_iops; | |
f057f6cd SW |
145 | if (gfs2_localflocks(sdp)) |
146 | inode->i_fop = gfs2_dir_fops_nolock; | |
c97bfe43 | 147 | else |
f057f6cd | 148 | inode->i_fop = gfs2_dir_fops; |
35dcc52e WC |
149 | } else if (S_ISLNK(mode)) { |
150 | inode->i_op = &gfs2_symlink_iops; | |
151 | } else { | |
d83225d4 | 152 | inode->i_op = &gfs2_file_iops; |
43a33c53 | 153 | init_special_inode(inode, inode->i_mode, inode->i_rdev); |
35dcc52e WC |
154 | } |
155 | ||
156 | unlock_new_inode(inode); | |
157 | } | |
158 | ||
b3b94faa | 159 | /** |
feaa7bba SW |
160 | * gfs2_inode_lookup - Lookup an inode |
161 | * @sb: The super block | |
dbb7cae2 | 162 | * @no_addr: The inode number |
feaa7bba | 163 | * @type: The type of the inode |
7a9f53b3 | 164 | * @skip_freeing: set this not return an inode if it is currently being freed. |
b3b94faa | 165 | * |
feaa7bba | 166 | * Returns: A VFS inode, or an error |
b3b94faa DT |
167 | */ |
168 | ||
091806ed | 169 | struct inode *gfs2_inode_lookup(struct super_block *sb, |
bb9bcf06 WC |
170 | unsigned int type, |
171 | u64 no_addr, | |
7a9f53b3 | 172 | u64 no_formal_ino, int skip_freeing) |
b3b94faa | 173 | { |
7a9f53b3 BM |
174 | struct inode *inode; |
175 | struct gfs2_inode *ip; | |
feaa7bba SW |
176 | struct gfs2_glock *io_gl; |
177 | int error; | |
b3b94faa | 178 | |
7a9f53b3 BM |
179 | if (skip_freeing) |
180 | inode = gfs2_iget_skip(sb, no_addr); | |
181 | else | |
182 | inode = gfs2_iget(sb, no_addr); | |
183 | ip = GFS2_I(inode); | |
184 | ||
26d83ded SW |
185 | if (!inode) |
186 | return ERR_PTR(-ENOBUFS); | |
187 | ||
feaa7bba SW |
188 | if (inode->i_state & I_NEW) { |
189 | struct gfs2_sbd *sdp = GFS2_SB(inode); | |
bb9bcf06 | 190 | ip->i_no_formal_ino = no_formal_ino; |
b3b94faa | 191 | |
dbb7cae2 | 192 | error = gfs2_glock_get(sdp, no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl); |
feaa7bba SW |
193 | if (unlikely(error)) |
194 | goto fail; | |
195 | ip->i_gl->gl_object = ip; | |
b3b94faa | 196 | |
dbb7cae2 | 197 | error = gfs2_glock_get(sdp, no_addr, &gfs2_iopen_glops, CREATE, &io_gl); |
feaa7bba SW |
198 | if (unlikely(error)) |
199 | goto fail_put; | |
b3b94faa | 200 | |
bfded27b | 201 | set_bit(GIF_INVALID, &ip->i_flags); |
feaa7bba SW |
202 | error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh); |
203 | if (unlikely(error)) | |
204 | goto fail_iopen; | |
d93cfa98 | 205 | ip->i_iopen_gh.gh_gl->gl_object = ip; |
b3b94faa | 206 | |
feaa7bba | 207 | gfs2_glock_put(io_gl); |
c8cdf479 | 208 | |
35dcc52e WC |
209 | if ((type == DT_UNKNOWN) && (no_formal_ino == 0)) |
210 | goto gfs2_nfsbypass; | |
211 | ||
212 | inode->i_mode = DT2IF(type); | |
213 | ||
c8cdf479 SW |
214 | /* |
215 | * We must read the inode in order to work out its type in | |
216 | * this case. Note that this doesn't happen often as we normally | |
217 | * know the type beforehand. This code path only occurs during | |
218 | * unlinked inode recovery (where it is safe to do this glock, | |
219 | * which is not true in the general case). | |
220 | */ | |
c8cdf479 SW |
221 | if (type == DT_UNKNOWN) { |
222 | struct gfs2_holder gh; | |
223 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); | |
224 | if (unlikely(error)) | |
225 | goto fail_glock; | |
226 | /* Inode is now uptodate */ | |
c8cdf479 SW |
227 | gfs2_glock_dq_uninit(&gh); |
228 | } | |
229 | ||
35dcc52e | 230 | gfs2_set_iop(inode); |
feaa7bba | 231 | } |
b3b94faa | 232 | |
35dcc52e | 233 | gfs2_nfsbypass: |
b3b94faa | 234 | return inode; |
c8cdf479 SW |
235 | fail_glock: |
236 | gfs2_glock_dq(&ip->i_iopen_gh); | |
feaa7bba SW |
237 | fail_iopen: |
238 | gfs2_glock_put(io_gl); | |
239 | fail_put: | |
240 | ip->i_gl->gl_object = NULL; | |
241 | gfs2_glock_put(ip->i_gl); | |
242 | fail: | |
69840b0d | 243 | iget_failed(inode); |
feaa7bba | 244 | return ERR_PTR(error); |
b3b94faa DT |
245 | } |
246 | ||
af339c02 | 247 | static int gfs2_dinode_in(struct gfs2_inode *ip, const void *buf) |
ea744d01 | 248 | { |
ea744d01 | 249 | const struct gfs2_dinode *str = buf; |
719ee344 | 250 | struct timespec atime; |
9a004508 | 251 | u16 height, depth; |
ea744d01 | 252 | |
ecc30c79 SW |
253 | if (unlikely(ip->i_no_addr != be64_to_cpu(str->di_num.no_addr))) |
254 | goto corrupt; | |
dbb7cae2 | 255 | ip->i_no_formal_ino = be64_to_cpu(str->di_num.no_formal_ino); |
b60623c2 | 256 | ip->i_inode.i_mode = be32_to_cpu(str->di_mode); |
e7f14f4d | 257 | ip->i_inode.i_rdev = 0; |
b60623c2 | 258 | switch (ip->i_inode.i_mode & S_IFMT) { |
e7f14f4d SW |
259 | case S_IFBLK: |
260 | case S_IFCHR: | |
261 | ip->i_inode.i_rdev = MKDEV(be32_to_cpu(str->di_major), | |
262 | be32_to_cpu(str->di_minor)); | |
263 | break; | |
264 | }; | |
265 | ||
2933f925 SW |
266 | ip->i_inode.i_uid = be32_to_cpu(str->di_uid); |
267 | ip->i_inode.i_gid = be32_to_cpu(str->di_gid); | |
4f56110a SW |
268 | /* |
269 | * We will need to review setting the nlink count here in the | |
270 | * light of the forthcoming ro bind mount work. This is a reminder | |
271 | * to do that. | |
272 | */ | |
273 | ip->i_inode.i_nlink = be32_to_cpu(str->di_nlink); | |
c9e98886 SW |
274 | ip->i_disksize = be64_to_cpu(str->di_size); |
275 | i_size_write(&ip->i_inode, ip->i_disksize); | |
77658aad | 276 | gfs2_set_inode_blocks(&ip->i_inode, be64_to_cpu(str->di_blocks)); |
719ee344 SW |
277 | atime.tv_sec = be64_to_cpu(str->di_atime); |
278 | atime.tv_nsec = be32_to_cpu(str->di_atime_nsec); | |
279 | if (timespec_compare(&ip->i_inode.i_atime, &atime) < 0) | |
280 | ip->i_inode.i_atime = atime; | |
1a7b1eed | 281 | ip->i_inode.i_mtime.tv_sec = be64_to_cpu(str->di_mtime); |
4bd91ba1 | 282 | ip->i_inode.i_mtime.tv_nsec = be32_to_cpu(str->di_mtime_nsec); |
1a7b1eed | 283 | ip->i_inode.i_ctime.tv_sec = be64_to_cpu(str->di_ctime); |
4bd91ba1 | 284 | ip->i_inode.i_ctime.tv_nsec = be32_to_cpu(str->di_ctime_nsec); |
ea744d01 | 285 | |
ce276b06 | 286 | ip->i_goal = be64_to_cpu(str->di_goal_meta); |
bcf0b5b3 | 287 | ip->i_generation = be64_to_cpu(str->di_generation); |
ea744d01 | 288 | |
383f01fb | 289 | ip->i_diskflags = be32_to_cpu(str->di_flags); |
6b124d8d | 290 | gfs2_set_inode_flags(&ip->i_inode); |
ecc30c79 SW |
291 | height = be16_to_cpu(str->di_height); |
292 | if (unlikely(height > GFS2_MAX_META_HEIGHT)) | |
293 | goto corrupt; | |
294 | ip->i_height = (u8)height; | |
ea744d01 | 295 | |
9a004508 SW |
296 | depth = be16_to_cpu(str->di_depth); |
297 | if (unlikely(depth > GFS2_DIR_MAX_DEPTH)) | |
298 | goto corrupt; | |
299 | ip->i_depth = (u8)depth; | |
ad6203f2 | 300 | ip->i_entries = be32_to_cpu(str->di_entries); |
ea744d01 | 301 | |
3767ac21 | 302 | ip->i_eattr = be64_to_cpu(str->di_eattr); |
5561093e SW |
303 | if (S_ISREG(ip->i_inode.i_mode)) |
304 | gfs2_set_aops(&ip->i_inode); | |
305 | ||
af339c02 | 306 | return 0; |
ecc30c79 SW |
307 | corrupt: |
308 | if (gfs2_consist_inode(ip)) | |
309 | gfs2_dinode_print(ip); | |
310 | return -EIO; | |
ea744d01 SW |
311 | } |
312 | ||
b3b94faa DT |
313 | /** |
314 | * gfs2_inode_refresh - Refresh the incore copy of the dinode | |
315 | * @ip: The GFS2 inode | |
316 | * | |
317 | * Returns: errno | |
318 | */ | |
319 | ||
320 | int gfs2_inode_refresh(struct gfs2_inode *ip) | |
321 | { | |
322 | struct buffer_head *dibh; | |
323 | int error; | |
324 | ||
325 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
326 | if (error) | |
327 | return error; | |
328 | ||
feaa7bba | 329 | if (gfs2_metatype_check(GFS2_SB(&ip->i_inode), dibh, GFS2_METATYPE_DI)) { |
b3b94faa DT |
330 | brelse(dibh); |
331 | return -EIO; | |
332 | } | |
333 | ||
af339c02 | 334 | error = gfs2_dinode_in(ip, dibh->b_data); |
b3b94faa | 335 | brelse(dibh); |
bfded27b | 336 | clear_bit(GIF_INVALID, &ip->i_flags); |
b3b94faa | 337 | |
af339c02 | 338 | return error; |
b3b94faa DT |
339 | } |
340 | ||
feaa7bba | 341 | int gfs2_dinode_dealloc(struct gfs2_inode *ip) |
b3b94faa | 342 | { |
feaa7bba | 343 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa DT |
344 | struct gfs2_alloc *al; |
345 | struct gfs2_rgrpd *rgd; | |
346 | int error; | |
347 | ||
77658aad | 348 | if (gfs2_get_inode_blocks(&ip->i_inode) != 1) { |
b3b94faa | 349 | if (gfs2_consist_inode(ip)) |
4cc14f0b | 350 | gfs2_dinode_print(ip); |
b3b94faa DT |
351 | return -EIO; |
352 | } | |
353 | ||
354 | al = gfs2_alloc_get(ip); | |
182fe5ab CG |
355 | if (!al) |
356 | return -ENOMEM; | |
b3b94faa DT |
357 | |
358 | error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE); | |
359 | if (error) | |
360 | goto out; | |
361 | ||
362 | error = gfs2_rindex_hold(sdp, &al->al_ri_gh); | |
363 | if (error) | |
364 | goto out_qs; | |
365 | ||
dbb7cae2 | 366 | rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr); |
b3b94faa DT |
367 | if (!rgd) { |
368 | gfs2_consist_inode(ip); | |
369 | error = -EIO; | |
370 | goto out_rindex_relse; | |
371 | } | |
372 | ||
373 | error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, | |
374 | &al->al_rgd_gh); | |
375 | if (error) | |
376 | goto out_rindex_relse; | |
377 | ||
420b9e5e | 378 | error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_STATFS + RES_QUOTA, 1); |
b3b94faa DT |
379 | if (error) |
380 | goto out_rg_gunlock; | |
381 | ||
2bcd610d SW |
382 | set_bit(GLF_DIRTY, &ip->i_gl->gl_flags); |
383 | set_bit(GLF_LFLUSH, &ip->i_gl->gl_flags); | |
b3b94faa DT |
384 | |
385 | gfs2_free_di(rgd, ip); | |
386 | ||
b3b94faa | 387 | gfs2_trans_end(sdp); |
b3b94faa | 388 | |
feaa7bba | 389 | out_rg_gunlock: |
b3b94faa | 390 | gfs2_glock_dq_uninit(&al->al_rgd_gh); |
feaa7bba | 391 | out_rindex_relse: |
b3b94faa | 392 | gfs2_glock_dq_uninit(&al->al_ri_gh); |
feaa7bba | 393 | out_qs: |
b3b94faa | 394 | gfs2_quota_unhold(ip); |
36327521 | 395 | out: |
feaa7bba | 396 | gfs2_alloc_put(ip); |
b3b94faa DT |
397 | return error; |
398 | } | |
399 | ||
b3b94faa | 400 | /** |
87d21e07 | 401 | * gfs2_change_nlink - Change nlink count on inode |
b3b94faa DT |
402 | * @ip: The GFS2 inode |
403 | * @diff: The change in the nlink count required | |
404 | * | |
405 | * Returns: errno | |
406 | */ | |
87d21e07 | 407 | int gfs2_change_nlink(struct gfs2_inode *ip, int diff) |
b3b94faa DT |
408 | { |
409 | struct buffer_head *dibh; | |
cd915493 | 410 | u32 nlink; |
b3b94faa DT |
411 | int error; |
412 | ||
4f56110a SW |
413 | BUG_ON(diff != 1 && diff != -1); |
414 | nlink = ip->i_inode.i_nlink + diff; | |
b3b94faa DT |
415 | |
416 | /* If we are reducing the nlink count, but the new value ends up being | |
417 | bigger than the old one, we must have underflowed. */ | |
4f56110a | 418 | if (diff < 0 && nlink > ip->i_inode.i_nlink) { |
b3b94faa | 419 | if (gfs2_consist_inode(ip)) |
4cc14f0b | 420 | gfs2_dinode_print(ip); |
b3b94faa DT |
421 | return -EIO; |
422 | } | |
423 | ||
424 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
425 | if (error) | |
426 | return error; | |
427 | ||
4f56110a SW |
428 | if (diff > 0) |
429 | inc_nlink(&ip->i_inode); | |
430 | else | |
431 | drop_nlink(&ip->i_inode); | |
432 | ||
4bd91ba1 | 433 | ip->i_inode.i_ctime = CURRENT_TIME; |
b3b94faa | 434 | |
d4e9c4c3 | 435 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
539e5d6b | 436 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa | 437 | brelse(dibh); |
feaa7bba | 438 | mark_inode_dirty(&ip->i_inode); |
b3b94faa | 439 | |
87d21e07 | 440 | if (ip->i_inode.i_nlink == 0) |
ddee7608 | 441 | gfs2_unlink_di(&ip->i_inode); /* mark inode unlinked */ |
87d21e07 | 442 | |
5509826f WC |
443 | return error; |
444 | } | |
445 | ||
c752666c SW |
446 | struct inode *gfs2_lookup_simple(struct inode *dip, const char *name) |
447 | { | |
448 | struct qstr qstr; | |
6c93fd1e | 449 | struct inode *inode; |
71b86f56 | 450 | gfs2_str2qstr(&qstr, name); |
a569c711 | 451 | inode = gfs2_lookupi(dip, &qstr, 1); |
6c93fd1e RC |
452 | /* gfs2_lookupi has inconsistent callers: vfs |
453 | * related routines expect NULL for no entry found, | |
454 | * gfs2_lookup_simple callers expect ENOENT | |
455 | * and do not check for NULL. | |
456 | */ | |
457 | if (inode == NULL) | |
458 | return ERR_PTR(-ENOENT); | |
459 | else | |
460 | return inode; | |
c752666c SW |
461 | } |
462 | ||
463 | ||
b3b94faa DT |
464 | /** |
465 | * gfs2_lookupi - Look up a filename in a directory and return its inode | |
466 | * @d_gh: An initialized holder for the directory glock | |
467 | * @name: The name of the inode to look for | |
468 | * @is_root: If 1, ignore the caller's permissions | |
469 | * @i_gh: An uninitialized holder for the new inode glock | |
470 | * | |
d7c103d0 SW |
471 | * This can be called via the VFS filldir function when NFS is doing |
472 | * a readdirplus and the inode which its intending to stat isn't | |
473 | * already in cache. In this case we must not take the directory glock | |
474 | * again, since the readdir call will have already taken that lock. | |
b3b94faa DT |
475 | * |
476 | * Returns: errno | |
477 | */ | |
478 | ||
feaa7bba | 479 | struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name, |
a569c711 | 480 | int is_root) |
b3b94faa | 481 | { |
c9fd4307 | 482 | struct super_block *sb = dir->i_sb; |
feaa7bba | 483 | struct gfs2_inode *dip = GFS2_I(dir); |
b3b94faa | 484 | struct gfs2_holder d_gh; |
037bcbb7 | 485 | int error = 0; |
c752666c | 486 | struct inode *inode = NULL; |
d7c103d0 | 487 | int unlock = 0; |
b3b94faa DT |
488 | |
489 | if (!name->len || name->len > GFS2_FNAMESIZE) | |
c752666c | 490 | return ERR_PTR(-ENAMETOOLONG); |
b3b94faa | 491 | |
c752666c SW |
492 | if ((name->len == 1 && memcmp(name->name, ".", 1) == 0) || |
493 | (name->len == 2 && memcmp(name->name, "..", 2) == 0 && | |
494 | dir == sb->s_root->d_inode)) { | |
320dd101 SW |
495 | igrab(dir); |
496 | return dir; | |
b3b94faa DT |
497 | } |
498 | ||
7afd88d9 | 499 | if (gfs2_glock_is_locked_by_me(dip->i_gl) == NULL) { |
d7c103d0 SW |
500 | error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh); |
501 | if (error) | |
502 | return ERR_PTR(error); | |
503 | unlock = 1; | |
504 | } | |
b3b94faa DT |
505 | |
506 | if (!is_root) { | |
f58ba889 | 507 | error = gfs2_permission(dir, MAY_EXEC); |
b3b94faa DT |
508 | if (error) |
509 | goto out; | |
510 | } | |
511 | ||
dbb7cae2 SW |
512 | inode = gfs2_dir_search(dir, name); |
513 | if (IS_ERR(inode)) | |
514 | error = PTR_ERR(inode); | |
7359a19c | 515 | out: |
d7c103d0 SW |
516 | if (unlock) |
517 | gfs2_glock_dq_uninit(&d_gh); | |
c752666c SW |
518 | if (error == -ENOENT) |
519 | return NULL; | |
d7c103d0 | 520 | return inode ? inode : ERR_PTR(error); |
b3b94faa DT |
521 | } |
522 | ||
bb8d8a6f SW |
523 | static void gfs2_inum_range_in(struct gfs2_inum_range_host *ir, const void *buf) |
524 | { | |
525 | const struct gfs2_inum_range *str = buf; | |
526 | ||
527 | ir->ir_start = be64_to_cpu(str->ir_start); | |
528 | ir->ir_length = be64_to_cpu(str->ir_length); | |
529 | } | |
530 | ||
531 | static void gfs2_inum_range_out(const struct gfs2_inum_range_host *ir, void *buf) | |
532 | { | |
533 | struct gfs2_inum_range *str = buf; | |
534 | ||
535 | str->ir_start = cpu_to_be64(ir->ir_start); | |
536 | str->ir_length = cpu_to_be64(ir->ir_length); | |
537 | } | |
538 | ||
cd915493 | 539 | static int pick_formal_ino_1(struct gfs2_sbd *sdp, u64 *formal_ino) |
b3b94faa | 540 | { |
feaa7bba | 541 | struct gfs2_inode *ip = GFS2_I(sdp->sd_ir_inode); |
b3b94faa | 542 | struct buffer_head *bh; |
e6972647 | 543 | struct gfs2_inum_range_host ir; |
b3b94faa DT |
544 | int error; |
545 | ||
546 | error = gfs2_trans_begin(sdp, RES_DINODE, 0); | |
547 | if (error) | |
548 | return error; | |
f55ab26a | 549 | mutex_lock(&sdp->sd_inum_mutex); |
b3b94faa DT |
550 | |
551 | error = gfs2_meta_inode_buffer(ip, &bh); | |
552 | if (error) { | |
f55ab26a | 553 | mutex_unlock(&sdp->sd_inum_mutex); |
b3b94faa DT |
554 | gfs2_trans_end(sdp); |
555 | return error; | |
556 | } | |
557 | ||
558 | gfs2_inum_range_in(&ir, bh->b_data + sizeof(struct gfs2_dinode)); | |
559 | ||
560 | if (ir.ir_length) { | |
561 | *formal_ino = ir.ir_start++; | |
562 | ir.ir_length--; | |
d4e9c4c3 | 563 | gfs2_trans_add_bh(ip->i_gl, bh, 1); |
b3b94faa DT |
564 | gfs2_inum_range_out(&ir, |
565 | bh->b_data + sizeof(struct gfs2_dinode)); | |
566 | brelse(bh); | |
f55ab26a | 567 | mutex_unlock(&sdp->sd_inum_mutex); |
b3b94faa DT |
568 | gfs2_trans_end(sdp); |
569 | return 0; | |
570 | } | |
571 | ||
572 | brelse(bh); | |
573 | ||
f55ab26a | 574 | mutex_unlock(&sdp->sd_inum_mutex); |
b3b94faa DT |
575 | gfs2_trans_end(sdp); |
576 | ||
577 | return 1; | |
578 | } | |
579 | ||
cd915493 | 580 | static int pick_formal_ino_2(struct gfs2_sbd *sdp, u64 *formal_ino) |
b3b94faa | 581 | { |
feaa7bba SW |
582 | struct gfs2_inode *ip = GFS2_I(sdp->sd_ir_inode); |
583 | struct gfs2_inode *m_ip = GFS2_I(sdp->sd_inum_inode); | |
b3b94faa DT |
584 | struct gfs2_holder gh; |
585 | struct buffer_head *bh; | |
e6972647 | 586 | struct gfs2_inum_range_host ir; |
b3b94faa DT |
587 | int error; |
588 | ||
589 | error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); | |
590 | if (error) | |
591 | return error; | |
592 | ||
593 | error = gfs2_trans_begin(sdp, 2 * RES_DINODE, 0); | |
594 | if (error) | |
595 | goto out; | |
f55ab26a | 596 | mutex_lock(&sdp->sd_inum_mutex); |
b3b94faa DT |
597 | |
598 | error = gfs2_meta_inode_buffer(ip, &bh); | |
599 | if (error) | |
600 | goto out_end_trans; | |
907b9bce | 601 | |
b3b94faa DT |
602 | gfs2_inum_range_in(&ir, bh->b_data + sizeof(struct gfs2_dinode)); |
603 | ||
604 | if (!ir.ir_length) { | |
605 | struct buffer_head *m_bh; | |
cd915493 | 606 | u64 x, y; |
b44b84d7 | 607 | __be64 z; |
b3b94faa DT |
608 | |
609 | error = gfs2_meta_inode_buffer(m_ip, &m_bh); | |
610 | if (error) | |
611 | goto out_brelse; | |
612 | ||
b44b84d7 AV |
613 | z = *(__be64 *)(m_bh->b_data + sizeof(struct gfs2_dinode)); |
614 | x = y = be64_to_cpu(z); | |
b3b94faa DT |
615 | ir.ir_start = x; |
616 | ir.ir_length = GFS2_INUM_QUANTUM; | |
617 | x += GFS2_INUM_QUANTUM; | |
618 | if (x < y) | |
619 | gfs2_consist_inode(m_ip); | |
b44b84d7 | 620 | z = cpu_to_be64(x); |
d4e9c4c3 | 621 | gfs2_trans_add_bh(m_ip->i_gl, m_bh, 1); |
b44b84d7 | 622 | *(__be64 *)(m_bh->b_data + sizeof(struct gfs2_dinode)) = z; |
b3b94faa DT |
623 | |
624 | brelse(m_bh); | |
625 | } | |
626 | ||
627 | *formal_ino = ir.ir_start++; | |
628 | ir.ir_length--; | |
629 | ||
d4e9c4c3 | 630 | gfs2_trans_add_bh(ip->i_gl, bh, 1); |
b3b94faa DT |
631 | gfs2_inum_range_out(&ir, bh->b_data + sizeof(struct gfs2_dinode)); |
632 | ||
420b9e5e | 633 | out_brelse: |
b3b94faa | 634 | brelse(bh); |
420b9e5e | 635 | out_end_trans: |
f55ab26a | 636 | mutex_unlock(&sdp->sd_inum_mutex); |
b3b94faa | 637 | gfs2_trans_end(sdp); |
420b9e5e | 638 | out: |
b3b94faa | 639 | gfs2_glock_dq_uninit(&gh); |
b3b94faa DT |
640 | return error; |
641 | } | |
642 | ||
cd915493 | 643 | static int pick_formal_ino(struct gfs2_sbd *sdp, u64 *inum) |
b3b94faa DT |
644 | { |
645 | int error; | |
646 | ||
647 | error = pick_formal_ino_1(sdp, inum); | |
648 | if (error <= 0) | |
649 | return error; | |
650 | ||
651 | error = pick_formal_ino_2(sdp, inum); | |
652 | ||
653 | return error; | |
654 | } | |
655 | ||
656 | /** | |
657 | * create_ok - OK to create a new on-disk inode here? | |
658 | * @dip: Directory in which dinode is to be created | |
659 | * @name: Name of new dinode | |
660 | * @mode: | |
661 | * | |
662 | * Returns: errno | |
663 | */ | |
664 | ||
feaa7bba | 665 | static int create_ok(struct gfs2_inode *dip, const struct qstr *name, |
b3b94faa DT |
666 | unsigned int mode) |
667 | { | |
668 | int error; | |
669 | ||
f58ba889 | 670 | error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC); |
b3b94faa DT |
671 | if (error) |
672 | return error; | |
673 | ||
674 | /* Don't create entries in an unlinked directory */ | |
4f56110a | 675 | if (!dip->i_inode.i_nlink) |
b3b94faa DT |
676 | return -EPERM; |
677 | ||
dbb7cae2 | 678 | error = gfs2_dir_check(&dip->i_inode, name, NULL); |
b3b94faa DT |
679 | switch (error) { |
680 | case -ENOENT: | |
681 | error = 0; | |
682 | break; | |
683 | case 0: | |
684 | return -EEXIST; | |
685 | default: | |
686 | return error; | |
687 | } | |
688 | ||
ad6203f2 | 689 | if (dip->i_entries == (u32)-1) |
b3b94faa | 690 | return -EFBIG; |
4f56110a | 691 | if (S_ISDIR(mode) && dip->i_inode.i_nlink == (u32)-1) |
b3b94faa DT |
692 | return -EMLINK; |
693 | ||
694 | return 0; | |
695 | } | |
696 | ||
697 | static void munge_mode_uid_gid(struct gfs2_inode *dip, unsigned int *mode, | |
698 | unsigned int *uid, unsigned int *gid) | |
699 | { | |
feaa7bba | 700 | if (GFS2_SB(&dip->i_inode)->sd_args.ar_suiddir && |
2933f925 | 701 | (dip->i_inode.i_mode & S_ISUID) && dip->i_inode.i_uid) { |
b3b94faa DT |
702 | if (S_ISDIR(*mode)) |
703 | *mode |= S_ISUID; | |
3de7be33 | 704 | else if (dip->i_inode.i_uid != current_fsuid()) |
b3b94faa | 705 | *mode &= ~07111; |
2933f925 | 706 | *uid = dip->i_inode.i_uid; |
b3b94faa | 707 | } else |
3de7be33 | 708 | *uid = current_fsuid(); |
b3b94faa | 709 | |
b60623c2 | 710 | if (dip->i_inode.i_mode & S_ISGID) { |
b3b94faa DT |
711 | if (S_ISDIR(*mode)) |
712 | *mode |= S_ISGID; | |
2933f925 | 713 | *gid = dip->i_inode.i_gid; |
b3b94faa | 714 | } else |
3de7be33 | 715 | *gid = current_fsgid(); |
b3b94faa DT |
716 | } |
717 | ||
dbb7cae2 | 718 | static int alloc_dinode(struct gfs2_inode *dip, u64 *no_addr, u64 *generation) |
b3b94faa | 719 | { |
feaa7bba | 720 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); |
b3b94faa DT |
721 | int error; |
722 | ||
6dbd8224 SW |
723 | if (gfs2_alloc_get(dip) == NULL) |
724 | return -ENOMEM; | |
b3b94faa | 725 | |
6dbd8224 | 726 | dip->i_alloc->al_requested = RES_DINODE; |
b3b94faa DT |
727 | error = gfs2_inplace_reserve(dip); |
728 | if (error) | |
729 | goto out; | |
730 | ||
feaa7bba | 731 | error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_STATFS, 0); |
b3b94faa DT |
732 | if (error) |
733 | goto out_ipreserv; | |
734 | ||
dbb7cae2 | 735 | *no_addr = gfs2_alloc_di(dip, generation); |
b3b94faa DT |
736 | |
737 | gfs2_trans_end(sdp); | |
738 | ||
4340fe62 | 739 | out_ipreserv: |
b3b94faa | 740 | gfs2_inplace_release(dip); |
4340fe62 | 741 | out: |
b3b94faa | 742 | gfs2_alloc_put(dip); |
b3b94faa DT |
743 | return error; |
744 | } | |
745 | ||
746 | /** | |
747 | * init_dinode - Fill in a new dinode structure | |
748 | * @dip: the directory this inode is being created in | |
749 | * @gl: The glock covering the new inode | |
750 | * @inum: the inode number | |
751 | * @mode: the file permissions | |
752 | * @uid: | |
753 | * @gid: | |
754 | * | |
755 | */ | |
756 | ||
757 | static void init_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl, | |
629a21e7 | 758 | const struct gfs2_inum_host *inum, unsigned int mode, |
4340fe62 | 759 | unsigned int uid, unsigned int gid, |
e9bd2b3b | 760 | const u64 *generation, dev_t dev, struct buffer_head **bhp) |
b3b94faa | 761 | { |
feaa7bba | 762 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); |
b96ca4fa | 763 | struct gfs2_dinode *di; |
b3b94faa | 764 | struct buffer_head *dibh; |
4bd91ba1 | 765 | struct timespec tv = CURRENT_TIME; |
b3b94faa DT |
766 | |
767 | dibh = gfs2_meta_new(gl, inum->no_addr); | |
d4e9c4c3 | 768 | gfs2_trans_add_bh(gl, dibh, 1); |
b3b94faa DT |
769 | gfs2_metatype_set(dibh, GFS2_METATYPE_DI, GFS2_FORMAT_DI); |
770 | gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode)); | |
b96ca4fa SW |
771 | di = (struct gfs2_dinode *)dibh->b_data; |
772 | ||
2442a098 SW |
773 | di->di_num.no_formal_ino = cpu_to_be64(inum->no_formal_ino); |
774 | di->di_num.no_addr = cpu_to_be64(inum->no_addr); | |
b96ca4fa SW |
775 | di->di_mode = cpu_to_be32(mode); |
776 | di->di_uid = cpu_to_be32(uid); | |
777 | di->di_gid = cpu_to_be32(gid); | |
294caaa3 SW |
778 | di->di_nlink = 0; |
779 | di->di_size = 0; | |
b96ca4fa | 780 | di->di_blocks = cpu_to_be64(1); |
4bd91ba1 | 781 | di->di_atime = di->di_mtime = di->di_ctime = cpu_to_be64(tv.tv_sec); |
e7f14f4d SW |
782 | di->di_major = cpu_to_be32(MAJOR(dev)); |
783 | di->di_minor = cpu_to_be32(MINOR(dev)); | |
b96ca4fa | 784 | di->di_goal_meta = di->di_goal_data = cpu_to_be64(inum->no_addr); |
4340fe62 | 785 | di->di_generation = cpu_to_be64(*generation); |
294caaa3 | 786 | di->di_flags = 0; |
b3b94faa DT |
787 | |
788 | if (S_ISREG(mode)) { | |
383f01fb | 789 | if ((dip->i_diskflags & GFS2_DIF_INHERIT_JDATA) || |
b3b94faa | 790 | gfs2_tune_get(sdp, gt_new_files_jdata)) |
b96ca4fa | 791 | di->di_flags |= cpu_to_be32(GFS2_DIF_JDATA); |
b3b94faa | 792 | } else if (S_ISDIR(mode)) { |
383f01fb | 793 | di->di_flags |= cpu_to_be32(dip->i_diskflags & |
568f4c96 | 794 | GFS2_DIF_INHERIT_JDATA); |
b3b94faa DT |
795 | } |
796 | ||
b96ca4fa | 797 | di->__pad1 = 0; |
a9583c79 | 798 | di->di_payload_format = cpu_to_be32(S_ISDIR(mode) ? GFS2_FORMAT_DE : 0); |
294caaa3 | 799 | di->di_height = 0; |
b96ca4fa SW |
800 | di->__pad2 = 0; |
801 | di->__pad3 = 0; | |
294caaa3 SW |
802 | di->di_depth = 0; |
803 | di->di_entries = 0; | |
b96ca4fa | 804 | memset(&di->__pad4, 0, sizeof(di->__pad4)); |
294caaa3 | 805 | di->di_eattr = 0; |
4bd91ba1 SW |
806 | di->di_atime_nsec = cpu_to_be32(tv.tv_nsec); |
807 | di->di_mtime_nsec = cpu_to_be32(tv.tv_nsec); | |
808 | di->di_ctime_nsec = cpu_to_be32(tv.tv_nsec); | |
b96ca4fa | 809 | memset(&di->di_reserved, 0, sizeof(di->di_reserved)); |
e9bd2b3b WC |
810 | |
811 | set_buffer_uptodate(dibh); | |
b96ca4fa | 812 | |
e9bd2b3b | 813 | *bhp = dibh; |
b3b94faa DT |
814 | } |
815 | ||
816 | static int make_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl, | |
629a21e7 | 817 | unsigned int mode, const struct gfs2_inum_host *inum, |
e9bd2b3b | 818 | const u64 *generation, dev_t dev, struct buffer_head **bhp) |
b3b94faa | 819 | { |
feaa7bba | 820 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); |
b3b94faa DT |
821 | unsigned int uid, gid; |
822 | int error; | |
823 | ||
824 | munge_mode_uid_gid(dip, &mode, &uid, &gid); | |
182fe5ab CG |
825 | if (!gfs2_alloc_get(dip)) |
826 | return -ENOMEM; | |
b3b94faa DT |
827 | |
828 | error = gfs2_quota_lock(dip, uid, gid); | |
829 | if (error) | |
830 | goto out; | |
831 | ||
832 | error = gfs2_quota_check(dip, uid, gid); | |
833 | if (error) | |
834 | goto out_quota; | |
835 | ||
feaa7bba | 836 | error = gfs2_trans_begin(sdp, RES_DINODE + RES_QUOTA, 0); |
b3b94faa DT |
837 | if (error) |
838 | goto out_quota; | |
839 | ||
e9bd2b3b | 840 | init_dinode(dip, gl, inum, mode, uid, gid, generation, dev, bhp); |
b3b94faa | 841 | gfs2_quota_change(dip, +1, uid, gid); |
b3b94faa DT |
842 | gfs2_trans_end(sdp); |
843 | ||
feaa7bba | 844 | out_quota: |
b3b94faa | 845 | gfs2_quota_unlock(dip); |
feaa7bba | 846 | out: |
b3b94faa | 847 | gfs2_alloc_put(dip); |
b3b94faa DT |
848 | return error; |
849 | } | |
850 | ||
feaa7bba SW |
851 | static int link_dinode(struct gfs2_inode *dip, const struct qstr *name, |
852 | struct gfs2_inode *ip) | |
b3b94faa | 853 | { |
feaa7bba | 854 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); |
b3b94faa DT |
855 | struct gfs2_alloc *al; |
856 | int alloc_required; | |
857 | struct buffer_head *dibh; | |
858 | int error; | |
859 | ||
860 | al = gfs2_alloc_get(dip); | |
182fe5ab CG |
861 | if (!al) |
862 | return -ENOMEM; | |
b3b94faa DT |
863 | |
864 | error = gfs2_quota_lock(dip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE); | |
865 | if (error) | |
866 | goto fail; | |
867 | ||
feaa7bba | 868 | error = alloc_required = gfs2_diradd_alloc_required(&dip->i_inode, name); |
c752666c | 869 | if (alloc_required < 0) |
1b8177ec | 870 | goto fail_quota_locks; |
b3b94faa | 871 | if (alloc_required) { |
2933f925 | 872 | error = gfs2_quota_check(dip, dip->i_inode.i_uid, dip->i_inode.i_gid); |
b3b94faa DT |
873 | if (error) |
874 | goto fail_quota_locks; | |
875 | ||
876 | al->al_requested = sdp->sd_max_dirres; | |
877 | ||
878 | error = gfs2_inplace_reserve(dip); | |
879 | if (error) | |
880 | goto fail_quota_locks; | |
881 | ||
320dd101 | 882 | error = gfs2_trans_begin(sdp, sdp->sd_max_dirres + |
bb8d8a6f | 883 | al->al_rgd->rd_length + |
907b9bce | 884 | 2 * RES_DINODE + |
b3b94faa DT |
885 | RES_STATFS + RES_QUOTA, 0); |
886 | if (error) | |
887 | goto fail_ipreserv; | |
888 | } else { | |
feaa7bba | 889 | error = gfs2_trans_begin(sdp, RES_LEAF + 2 * RES_DINODE, 0); |
b3b94faa DT |
890 | if (error) |
891 | goto fail_quota_locks; | |
892 | } | |
893 | ||
dbb7cae2 | 894 | error = gfs2_dir_add(&dip->i_inode, name, ip, IF2DT(ip->i_inode.i_mode)); |
b3b94faa DT |
895 | if (error) |
896 | goto fail_end_trans; | |
897 | ||
898 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
899 | if (error) | |
900 | goto fail_end_trans; | |
4f56110a | 901 | ip->i_inode.i_nlink = 1; |
d4e9c4c3 | 902 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
539e5d6b | 903 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa | 904 | brelse(dibh); |
b3b94faa DT |
905 | return 0; |
906 | ||
320dd101 | 907 | fail_end_trans: |
b3b94faa DT |
908 | gfs2_trans_end(sdp); |
909 | ||
320dd101 | 910 | fail_ipreserv: |
6dbd8224 | 911 | if (dip->i_alloc->al_rgd) |
b3b94faa DT |
912 | gfs2_inplace_release(dip); |
913 | ||
320dd101 | 914 | fail_quota_locks: |
b3b94faa DT |
915 | gfs2_quota_unlock(dip); |
916 | ||
320dd101 | 917 | fail: |
b3b94faa | 918 | gfs2_alloc_put(dip); |
b3b94faa DT |
919 | return error; |
920 | } | |
921 | ||
fcb47e0b RH |
922 | static int gfs2_security_init(struct gfs2_inode *dip, struct gfs2_inode *ip) |
923 | { | |
924 | int err; | |
925 | size_t len; | |
926 | void *value; | |
927 | char *name; | |
928 | struct gfs2_ea_request er; | |
929 | ||
930 | err = security_inode_init_security(&ip->i_inode, &dip->i_inode, | |
931 | &name, &value, &len); | |
932 | ||
933 | if (err) { | |
934 | if (err == -EOPNOTSUPP) | |
935 | return 0; | |
936 | return err; | |
937 | } | |
938 | ||
939 | memset(&er, 0, sizeof(struct gfs2_ea_request)); | |
940 | ||
941 | er.er_type = GFS2_EATYPE_SECURITY; | |
942 | er.er_name = name; | |
943 | er.er_data = value; | |
944 | er.er_name_len = strlen(name); | |
945 | er.er_data_len = len; | |
946 | ||
947 | err = gfs2_ea_set_i(ip, &er); | |
948 | ||
949 | kfree(value); | |
950 | kfree(name); | |
951 | ||
952 | return err; | |
953 | } | |
954 | ||
b3b94faa DT |
955 | /** |
956 | * gfs2_createi - Create a new inode | |
957 | * @ghs: An array of two holders | |
958 | * @name: The name of the new file | |
959 | * @mode: the permissions on the new inode | |
960 | * | |
961 | * @ghs[0] is an initialized holder for the directory | |
962 | * @ghs[1] is the holder for the inode lock | |
963 | * | |
7359a19c | 964 | * If the return value is not NULL, the glocks on both the directory and the new |
b3b94faa DT |
965 | * file are held. A transaction has been started and an inplace reservation |
966 | * is held, as well. | |
967 | * | |
7359a19c | 968 | * Returns: An inode |
b3b94faa DT |
969 | */ |
970 | ||
feaa7bba | 971 | struct inode *gfs2_createi(struct gfs2_holder *ghs, const struct qstr *name, |
e7f14f4d | 972 | unsigned int mode, dev_t dev) |
b3b94faa | 973 | { |
e1cc8603 | 974 | struct inode *inode = NULL; |
5c676f6d | 975 | struct gfs2_inode *dip = ghs->gh_gl->gl_object; |
feaa7bba SW |
976 | struct inode *dir = &dip->i_inode; |
977 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); | |
dbb7cae2 | 978 | struct gfs2_inum_host inum = { .no_addr = 0, .no_formal_ino = 0 }; |
b3b94faa | 979 | int error; |
4340fe62 | 980 | u64 generation; |
f91a0d3e | 981 | struct buffer_head *bh = NULL; |
b3b94faa DT |
982 | |
983 | if (!name->len || name->len > GFS2_FNAMESIZE) | |
7359a19c | 984 | return ERR_PTR(-ENAMETOOLONG); |
b3b94faa | 985 | |
b3b94faa DT |
986 | gfs2_holder_reinit(LM_ST_EXCLUSIVE, 0, ghs); |
987 | error = gfs2_glock_nq(ghs); | |
988 | if (error) | |
989 | goto fail; | |
990 | ||
991 | error = create_ok(dip, name, mode); | |
992 | if (error) | |
993 | goto fail_gunlock; | |
994 | ||
feaa7bba | 995 | error = pick_formal_ino(sdp, &inum.no_formal_ino); |
b3b94faa DT |
996 | if (error) |
997 | goto fail_gunlock; | |
998 | ||
dbb7cae2 | 999 | error = alloc_dinode(dip, &inum.no_addr, &generation); |
b3b94faa DT |
1000 | if (error) |
1001 | goto fail_gunlock; | |
1002 | ||
28626e20 SW |
1003 | error = gfs2_glock_nq_num(sdp, inum.no_addr, &gfs2_inode_glops, |
1004 | LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1); | |
1005 | if (error) | |
1006 | goto fail_gunlock; | |
b3b94faa | 1007 | |
e9bd2b3b | 1008 | error = make_dinode(dip, ghs[1].gh_gl, mode, &inum, &generation, dev, &bh); |
b3b94faa DT |
1009 | if (error) |
1010 | goto fail_gunlock2; | |
1011 | ||
bb9bcf06 WC |
1012 | inode = gfs2_inode_lookup(dir->i_sb, IF2DT(mode), |
1013 | inum.no_addr, | |
7a9f53b3 | 1014 | inum.no_formal_ino, 0); |
feaa7bba | 1015 | if (IS_ERR(inode)) |
b3b94faa DT |
1016 | goto fail_gunlock2; |
1017 | ||
feaa7bba | 1018 | error = gfs2_inode_refresh(GFS2_I(inode)); |
b3b94faa | 1019 | if (error) |
e1cc8603 | 1020 | goto fail_gunlock2; |
b3b94faa | 1021 | |
feaa7bba | 1022 | error = gfs2_acl_create(dip, GFS2_I(inode)); |
b3b94faa | 1023 | if (error) |
e1cc8603 | 1024 | goto fail_gunlock2; |
b3b94faa | 1025 | |
fcb47e0b RH |
1026 | error = gfs2_security_init(dip, GFS2_I(inode)); |
1027 | if (error) | |
e1cc8603 | 1028 | goto fail_gunlock2; |
fcb47e0b | 1029 | |
feaa7bba | 1030 | error = link_dinode(dip, name, GFS2_I(inode)); |
b3b94faa | 1031 | if (error) |
e1cc8603 | 1032 | goto fail_gunlock2; |
b3b94faa | 1033 | |
f91a0d3e SW |
1034 | if (bh) |
1035 | brelse(bh); | |
7359a19c | 1036 | return inode; |
b3b94faa | 1037 | |
320dd101 | 1038 | fail_gunlock2: |
b3b94faa | 1039 | gfs2_glock_dq_uninit(ghs + 1); |
bd1eb881 | 1040 | if (inode && !IS_ERR(inode)) |
e1cc8603 | 1041 | iput(inode); |
320dd101 | 1042 | fail_gunlock: |
b3b94faa | 1043 | gfs2_glock_dq(ghs); |
320dd101 | 1044 | fail: |
f91a0d3e SW |
1045 | if (bh) |
1046 | brelse(bh); | |
7359a19c | 1047 | return ERR_PTR(error); |
b3b94faa DT |
1048 | } |
1049 | ||
b3b94faa DT |
1050 | /** |
1051 | * gfs2_rmdiri - Remove a directory | |
1052 | * @dip: The parent directory of the directory to be removed | |
1053 | * @name: The name of the directory to be removed | |
1054 | * @ip: The GFS2 inode of the directory to be removed | |
1055 | * | |
1056 | * Assumes Glocks on dip and ip are held | |
1057 | * | |
1058 | * Returns: errno | |
1059 | */ | |
1060 | ||
feaa7bba SW |
1061 | int gfs2_rmdiri(struct gfs2_inode *dip, const struct qstr *name, |
1062 | struct gfs2_inode *ip) | |
b3b94faa | 1063 | { |
b3b94faa DT |
1064 | struct qstr dotname; |
1065 | int error; | |
1066 | ||
ad6203f2 | 1067 | if (ip->i_entries != 2) { |
b3b94faa | 1068 | if (gfs2_consist_inode(ip)) |
4cc14f0b | 1069 | gfs2_dinode_print(ip); |
b3b94faa DT |
1070 | return -EIO; |
1071 | } | |
1072 | ||
1073 | error = gfs2_dir_del(dip, name); | |
1074 | if (error) | |
1075 | return error; | |
1076 | ||
1077 | error = gfs2_change_nlink(dip, -1); | |
1078 | if (error) | |
1079 | return error; | |
1080 | ||
71b86f56 | 1081 | gfs2_str2qstr(&dotname, "."); |
b3b94faa DT |
1082 | error = gfs2_dir_del(ip, &dotname); |
1083 | if (error) | |
1084 | return error; | |
1085 | ||
feaa7bba | 1086 | gfs2_str2qstr(&dotname, ".."); |
b3b94faa DT |
1087 | error = gfs2_dir_del(ip, &dotname); |
1088 | if (error) | |
1089 | return error; | |
1090 | ||
4f56110a SW |
1091 | /* It looks odd, but it really should be done twice */ |
1092 | error = gfs2_change_nlink(ip, -1); | |
1093 | if (error) | |
1094 | return error; | |
1095 | ||
1096 | error = gfs2_change_nlink(ip, -1); | |
b3b94faa DT |
1097 | if (error) |
1098 | return error; | |
1099 | ||
b3b94faa DT |
1100 | return error; |
1101 | } | |
1102 | ||
1103 | /* | |
1104 | * gfs2_unlink_ok - check to see that a inode is still in a directory | |
1105 | * @dip: the directory | |
1106 | * @name: the name of the file | |
1107 | * @ip: the inode | |
1108 | * | |
1109 | * Assumes that the lock on (at least) @dip is held. | |
1110 | * | |
1111 | * Returns: 0 if the parent/child relationship is correct, errno if it isn't | |
1112 | */ | |
1113 | ||
feaa7bba | 1114 | int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name, |
dbb7cae2 | 1115 | const struct gfs2_inode *ip) |
b3b94faa | 1116 | { |
b3b94faa DT |
1117 | int error; |
1118 | ||
feaa7bba | 1119 | if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode)) |
b3b94faa DT |
1120 | return -EPERM; |
1121 | ||
b60623c2 | 1122 | if ((dip->i_inode.i_mode & S_ISVTX) && |
3de7be33 DH |
1123 | dip->i_inode.i_uid != current_fsuid() && |
1124 | ip->i_inode.i_uid != current_fsuid() && !capable(CAP_FOWNER)) | |
b3b94faa DT |
1125 | return -EPERM; |
1126 | ||
feaa7bba | 1127 | if (IS_APPEND(&dip->i_inode)) |
b3b94faa DT |
1128 | return -EPERM; |
1129 | ||
f58ba889 | 1130 | error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC); |
b3b94faa DT |
1131 | if (error) |
1132 | return error; | |
1133 | ||
dbb7cae2 | 1134 | error = gfs2_dir_check(&dip->i_inode, name, ip); |
b3b94faa DT |
1135 | if (error) |
1136 | return error; | |
1137 | ||
b3b94faa DT |
1138 | return 0; |
1139 | } | |
1140 | ||
b3b94faa DT |
1141 | /** |
1142 | * gfs2_readlinki - return the contents of a symlink | |
1143 | * @ip: the symlink's inode | |
1144 | * @buf: a pointer to the buffer to be filled | |
1145 | * @len: a pointer to the length of @buf | |
1146 | * | |
1147 | * If @buf is too small, a piece of memory is kmalloc()ed and needs | |
1148 | * to be freed by the caller. | |
1149 | * | |
1150 | * Returns: errno | |
1151 | */ | |
1152 | ||
1153 | int gfs2_readlinki(struct gfs2_inode *ip, char **buf, unsigned int *len) | |
1154 | { | |
1155 | struct gfs2_holder i_gh; | |
1156 | struct buffer_head *dibh; | |
1157 | unsigned int x; | |
1158 | int error; | |
1159 | ||
719ee344 SW |
1160 | gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh); |
1161 | error = gfs2_glock_nq(&i_gh); | |
b3b94faa DT |
1162 | if (error) { |
1163 | gfs2_holder_uninit(&i_gh); | |
1164 | return error; | |
1165 | } | |
1166 | ||
c9e98886 | 1167 | if (!ip->i_disksize) { |
b3b94faa DT |
1168 | gfs2_consist_inode(ip); |
1169 | error = -EIO; | |
1170 | goto out; | |
1171 | } | |
1172 | ||
1173 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1174 | if (error) | |
1175 | goto out; | |
1176 | ||
c9e98886 | 1177 | x = ip->i_disksize + 1; |
b3b94faa | 1178 | if (x > *len) { |
16c5f06f | 1179 | *buf = kmalloc(x, GFP_NOFS); |
b3b94faa DT |
1180 | if (!*buf) { |
1181 | error = -ENOMEM; | |
1182 | goto out_brelse; | |
1183 | } | |
1184 | } | |
1185 | ||
1186 | memcpy(*buf, dibh->b_data + sizeof(struct gfs2_dinode), x); | |
1187 | *len = x; | |
1188 | ||
feaa7bba | 1189 | out_brelse: |
b3b94faa | 1190 | brelse(dibh); |
feaa7bba | 1191 | out: |
b3b94faa | 1192 | gfs2_glock_dq_uninit(&i_gh); |
b3b94faa DT |
1193 | return error; |
1194 | } | |
1195 | ||
b3b94faa DT |
1196 | static int |
1197 | __gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr) | |
1198 | { | |
1199 | struct buffer_head *dibh; | |
1200 | int error; | |
1201 | ||
1202 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1203 | if (!error) { | |
feaa7bba SW |
1204 | error = inode_setattr(&ip->i_inode, attr); |
1205 | gfs2_assert_warn(GFS2_SB(&ip->i_inode), !error); | |
d4e9c4c3 | 1206 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
539e5d6b | 1207 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa DT |
1208 | brelse(dibh); |
1209 | } | |
1210 | return error; | |
1211 | } | |
1212 | ||
1213 | /** | |
1214 | * gfs2_setattr_simple - | |
1215 | * @ip: | |
1216 | * @attr: | |
1217 | * | |
1218 | * Called with a reference on the vnode. | |
1219 | * | |
1220 | * Returns: errno | |
1221 | */ | |
1222 | ||
1223 | int gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr) | |
1224 | { | |
1225 | int error; | |
1226 | ||
5c676f6d | 1227 | if (current->journal_info) |
b3b94faa DT |
1228 | return __gfs2_setattr_simple(ip, attr); |
1229 | ||
feaa7bba | 1230 | error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE, 0); |
b3b94faa DT |
1231 | if (error) |
1232 | return error; | |
1233 | ||
1234 | error = __gfs2_setattr_simple(ip, attr); | |
feaa7bba | 1235 | gfs2_trans_end(GFS2_SB(&ip->i_inode)); |
b3b94faa DT |
1236 | return error; |
1237 | } | |
1238 | ||
bb8d8a6f SW |
1239 | void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf) |
1240 | { | |
bb8d8a6f SW |
1241 | struct gfs2_dinode *str = buf; |
1242 | ||
1243 | str->di_header.mh_magic = cpu_to_be32(GFS2_MAGIC); | |
1244 | str->di_header.mh_type = cpu_to_be32(GFS2_METATYPE_DI); | |
1245 | str->di_header.__pad0 = 0; | |
1246 | str->di_header.mh_format = cpu_to_be32(GFS2_FORMAT_DI); | |
1247 | str->di_header.__pad1 = 0; | |
1248 | str->di_num.no_addr = cpu_to_be64(ip->i_no_addr); | |
1249 | str->di_num.no_formal_ino = cpu_to_be64(ip->i_no_formal_ino); | |
1250 | str->di_mode = cpu_to_be32(ip->i_inode.i_mode); | |
1251 | str->di_uid = cpu_to_be32(ip->i_inode.i_uid); | |
1252 | str->di_gid = cpu_to_be32(ip->i_inode.i_gid); | |
1253 | str->di_nlink = cpu_to_be32(ip->i_inode.i_nlink); | |
c9e98886 | 1254 | str->di_size = cpu_to_be64(ip->i_disksize); |
77658aad | 1255 | str->di_blocks = cpu_to_be64(gfs2_get_inode_blocks(&ip->i_inode)); |
bb8d8a6f SW |
1256 | str->di_atime = cpu_to_be64(ip->i_inode.i_atime.tv_sec); |
1257 | str->di_mtime = cpu_to_be64(ip->i_inode.i_mtime.tv_sec); | |
1258 | str->di_ctime = cpu_to_be64(ip->i_inode.i_ctime.tv_sec); | |
1259 | ||
ce276b06 SW |
1260 | str->di_goal_meta = cpu_to_be64(ip->i_goal); |
1261 | str->di_goal_data = cpu_to_be64(ip->i_goal); | |
bcf0b5b3 | 1262 | str->di_generation = cpu_to_be64(ip->i_generation); |
bb8d8a6f | 1263 | |
383f01fb | 1264 | str->di_flags = cpu_to_be32(ip->i_diskflags); |
ecc30c79 | 1265 | str->di_height = cpu_to_be16(ip->i_height); |
bb8d8a6f | 1266 | str->di_payload_format = cpu_to_be32(S_ISDIR(ip->i_inode.i_mode) && |
383f01fb | 1267 | !(ip->i_diskflags & GFS2_DIF_EXHASH) ? |
bb8d8a6f | 1268 | GFS2_FORMAT_DE : 0); |
9a004508 | 1269 | str->di_depth = cpu_to_be16(ip->i_depth); |
ad6203f2 | 1270 | str->di_entries = cpu_to_be32(ip->i_entries); |
bb8d8a6f | 1271 | |
3767ac21 | 1272 | str->di_eattr = cpu_to_be64(ip->i_eattr); |
4bd91ba1 SW |
1273 | str->di_atime_nsec = cpu_to_be32(ip->i_inode.i_atime.tv_nsec); |
1274 | str->di_mtime_nsec = cpu_to_be32(ip->i_inode.i_mtime.tv_nsec); | |
1275 | str->di_ctime_nsec = cpu_to_be32(ip->i_inode.i_ctime.tv_nsec); | |
bb8d8a6f SW |
1276 | } |
1277 | ||
1278 | void gfs2_dinode_print(const struct gfs2_inode *ip) | |
1279 | { | |
bb8d8a6f SW |
1280 | printk(KERN_INFO " no_formal_ino = %llu\n", |
1281 | (unsigned long long)ip->i_no_formal_ino); | |
1282 | printk(KERN_INFO " no_addr = %llu\n", | |
1283 | (unsigned long long)ip->i_no_addr); | |
c9e98886 SW |
1284 | printk(KERN_INFO " i_disksize = %llu\n", |
1285 | (unsigned long long)ip->i_disksize); | |
77658aad SW |
1286 | printk(KERN_INFO " blocks = %llu\n", |
1287 | (unsigned long long)gfs2_get_inode_blocks(&ip->i_inode)); | |
ce276b06 SW |
1288 | printk(KERN_INFO " i_goal = %llu\n", |
1289 | (unsigned long long)ip->i_goal); | |
383f01fb | 1290 | printk(KERN_INFO " i_diskflags = 0x%.8X\n", ip->i_diskflags); |
ca390601 | 1291 | printk(KERN_INFO " i_height = %u\n", ip->i_height); |
9a004508 | 1292 | printk(KERN_INFO " i_depth = %u\n", ip->i_depth); |
ad6203f2 | 1293 | printk(KERN_INFO " i_entries = %u\n", ip->i_entries); |
3767ac21 SW |
1294 | printk(KERN_INFO " i_eattr = %llu\n", |
1295 | (unsigned long long)ip->i_eattr); | |
bb8d8a6f SW |
1296 | } |
1297 |