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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" | |
b3b94faa DT |
33 | #include "quota.h" |
34 | #include "rgrp.h" | |
35 | #include "trans.h" | |
5c676f6d | 36 | #include "util.h" |
b3b94faa | 37 | |
bb8d8a6f SW |
38 | struct gfs2_inum_range_host { |
39 | u64 ir_start; | |
40 | u64 ir_length; | |
41 | }; | |
42 | ||
feaa7bba SW |
43 | static int iget_test(struct inode *inode, void *opaque) |
44 | { | |
45 | struct gfs2_inode *ip = GFS2_I(inode); | |
dbb7cae2 | 46 | u64 *no_addr = opaque; |
feaa7bba | 47 | |
091806ed | 48 | if (ip->i_no_addr == *no_addr && test_bit(GIF_USER, &ip->i_flags)) |
feaa7bba | 49 | return 1; |
b3b94faa | 50 | |
feaa7bba SW |
51 | return 0; |
52 | } | |
53 | ||
54 | static int iget_set(struct inode *inode, void *opaque) | |
b3b94faa | 55 | { |
feaa7bba | 56 | struct gfs2_inode *ip = GFS2_I(inode); |
dbb7cae2 | 57 | u64 *no_addr = opaque; |
b3b94faa | 58 | |
dbb7cae2 SW |
59 | inode->i_ino = (unsigned long)*no_addr; |
60 | ip->i_no_addr = *no_addr; | |
091806ed | 61 | set_bit(GIF_USER, &ip->i_flags); |
feaa7bba SW |
62 | return 0; |
63 | } | |
b3b94faa | 64 | |
dbb7cae2 | 65 | struct inode *gfs2_ilookup(struct super_block *sb, u64 no_addr) |
feaa7bba | 66 | { |
dbb7cae2 SW |
67 | unsigned long hash = (unsigned long)no_addr; |
68 | return ilookup5(sb, hash, iget_test, &no_addr); | |
feaa7bba | 69 | } |
b3b94faa | 70 | |
dbb7cae2 | 71 | static struct inode *gfs2_iget(struct super_block *sb, u64 no_addr) |
feaa7bba | 72 | { |
dbb7cae2 SW |
73 | unsigned long hash = (unsigned long)no_addr; |
74 | return iget5_locked(sb, hash, iget_test, iget_set, &no_addr); | |
b3b94faa DT |
75 | } |
76 | ||
7a9f53b3 BM |
77 | struct gfs2_skip_data { |
78 | u64 no_addr; | |
79 | int skipped; | |
80 | }; | |
81 | ||
82 | static int iget_skip_test(struct inode *inode, void *opaque) | |
83 | { | |
84 | struct gfs2_inode *ip = GFS2_I(inode); | |
85 | struct gfs2_skip_data *data = opaque; | |
86 | ||
091806ed | 87 | if (ip->i_no_addr == data->no_addr && test_bit(GIF_USER, &ip->i_flags)){ |
7a9f53b3 BM |
88 | if (inode->i_state & (I_FREEING|I_CLEAR|I_WILL_FREE)){ |
89 | data->skipped = 1; | |
90 | return 0; | |
91 | } | |
92 | return 1; | |
93 | } | |
94 | return 0; | |
95 | } | |
96 | ||
97 | static int iget_skip_set(struct inode *inode, void *opaque) | |
98 | { | |
99 | struct gfs2_inode *ip = GFS2_I(inode); | |
100 | struct gfs2_skip_data *data = opaque; | |
101 | ||
102 | if (data->skipped) | |
103 | return 1; | |
104 | inode->i_ino = (unsigned long)(data->no_addr); | |
105 | ip->i_no_addr = data->no_addr; | |
091806ed | 106 | set_bit(GIF_USER, &ip->i_flags); |
7a9f53b3 BM |
107 | return 0; |
108 | } | |
109 | ||
110 | static struct inode *gfs2_iget_skip(struct super_block *sb, | |
111 | u64 no_addr) | |
112 | { | |
113 | struct gfs2_skip_data data; | |
114 | unsigned long hash = (unsigned long)no_addr; | |
115 | ||
116 | data.no_addr = no_addr; | |
117 | data.skipped = 0; | |
118 | return iget5_locked(sb, hash, iget_skip_test, iget_skip_set, &data); | |
119 | } | |
120 | ||
35dcc52e WC |
121 | /** |
122 | * GFS2 lookup code fills in vfs inode contents based on info obtained | |
123 | * from directory entry inside gfs2_inode_lookup(). This has caused issues | |
124 | * with NFS code path since its get_dentry routine doesn't have the relevant | |
125 | * directory entry when gfs2_inode_lookup() is invoked. Part of the code | |
126 | * segment inside gfs2_inode_lookup code needs to get moved around. | |
127 | * | |
128 | * Clean up I_LOCK and I_NEW as well. | |
129 | **/ | |
130 | ||
131 | void gfs2_set_iop(struct inode *inode) | |
132 | { | |
c97bfe43 | 133 | struct gfs2_sbd *sdp = GFS2_SB(inode); |
35dcc52e WC |
134 | umode_t mode = inode->i_mode; |
135 | ||
136 | if (S_ISREG(mode)) { | |
137 | inode->i_op = &gfs2_file_iops; | |
f057f6cd | 138 | if (gfs2_localflocks(sdp)) |
10d21988 | 139 | inode->i_fop = &gfs2_file_fops_nolock; |
c97bfe43 | 140 | else |
10d21988 | 141 | inode->i_fop = &gfs2_file_fops; |
35dcc52e WC |
142 | } else if (S_ISDIR(mode)) { |
143 | inode->i_op = &gfs2_dir_iops; | |
f057f6cd | 144 | if (gfs2_localflocks(sdp)) |
10d21988 | 145 | inode->i_fop = &gfs2_dir_fops_nolock; |
c97bfe43 | 146 | else |
10d21988 | 147 | inode->i_fop = &gfs2_dir_fops; |
35dcc52e WC |
148 | } else if (S_ISLNK(mode)) { |
149 | inode->i_op = &gfs2_symlink_iops; | |
150 | } else { | |
d83225d4 | 151 | inode->i_op = &gfs2_file_iops; |
43a33c53 | 152 | init_special_inode(inode, inode->i_mode, inode->i_rdev); |
35dcc52e WC |
153 | } |
154 | ||
155 | unlock_new_inode(inode); | |
156 | } | |
157 | ||
b3b94faa | 158 | /** |
feaa7bba SW |
159 | * gfs2_inode_lookup - Lookup an inode |
160 | * @sb: The super block | |
dbb7cae2 | 161 | * @no_addr: The inode number |
feaa7bba | 162 | * @type: The type of the inode |
7a9f53b3 | 163 | * @skip_freeing: set this not return an inode if it is currently being freed. |
b3b94faa | 164 | * |
feaa7bba | 165 | * Returns: A VFS inode, or an error |
b3b94faa DT |
166 | */ |
167 | ||
091806ed | 168 | struct inode *gfs2_inode_lookup(struct super_block *sb, |
bb9bcf06 WC |
169 | unsigned int type, |
170 | u64 no_addr, | |
7a9f53b3 | 171 | u64 no_formal_ino, int skip_freeing) |
b3b94faa | 172 | { |
7a9f53b3 BM |
173 | struct inode *inode; |
174 | struct gfs2_inode *ip; | |
feaa7bba SW |
175 | struct gfs2_glock *io_gl; |
176 | int error; | |
b3b94faa | 177 | |
7a9f53b3 BM |
178 | if (skip_freeing) |
179 | inode = gfs2_iget_skip(sb, no_addr); | |
180 | else | |
181 | inode = gfs2_iget(sb, no_addr); | |
182 | ip = GFS2_I(inode); | |
183 | ||
26d83ded SW |
184 | if (!inode) |
185 | return ERR_PTR(-ENOBUFS); | |
186 | ||
feaa7bba SW |
187 | if (inode->i_state & I_NEW) { |
188 | struct gfs2_sbd *sdp = GFS2_SB(inode); | |
bb9bcf06 | 189 | ip->i_no_formal_ino = no_formal_ino; |
b3b94faa | 190 | |
dbb7cae2 | 191 | error = gfs2_glock_get(sdp, no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl); |
feaa7bba SW |
192 | if (unlikely(error)) |
193 | goto fail; | |
194 | ip->i_gl->gl_object = ip; | |
b3b94faa | 195 | |
dbb7cae2 | 196 | error = gfs2_glock_get(sdp, no_addr, &gfs2_iopen_glops, CREATE, &io_gl); |
feaa7bba SW |
197 | if (unlikely(error)) |
198 | goto fail_put; | |
b3b94faa | 199 | |
bfded27b | 200 | set_bit(GIF_INVALID, &ip->i_flags); |
feaa7bba SW |
201 | error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh); |
202 | if (unlikely(error)) | |
203 | goto fail_iopen; | |
d93cfa98 | 204 | ip->i_iopen_gh.gh_gl->gl_object = ip; |
b3b94faa | 205 | |
feaa7bba | 206 | gfs2_glock_put(io_gl); |
c8cdf479 | 207 | |
35dcc52e WC |
208 | if ((type == DT_UNKNOWN) && (no_formal_ino == 0)) |
209 | goto gfs2_nfsbypass; | |
210 | ||
211 | inode->i_mode = DT2IF(type); | |
212 | ||
c8cdf479 SW |
213 | /* |
214 | * We must read the inode in order to work out its type in | |
215 | * this case. Note that this doesn't happen often as we normally | |
216 | * know the type beforehand. This code path only occurs during | |
217 | * unlinked inode recovery (where it is safe to do this glock, | |
218 | * which is not true in the general case). | |
219 | */ | |
c8cdf479 SW |
220 | if (type == DT_UNKNOWN) { |
221 | struct gfs2_holder gh; | |
222 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); | |
223 | if (unlikely(error)) | |
224 | goto fail_glock; | |
225 | /* Inode is now uptodate */ | |
c8cdf479 SW |
226 | gfs2_glock_dq_uninit(&gh); |
227 | } | |
228 | ||
35dcc52e | 229 | gfs2_set_iop(inode); |
feaa7bba | 230 | } |
b3b94faa | 231 | |
35dcc52e | 232 | gfs2_nfsbypass: |
b3b94faa | 233 | return inode; |
c8cdf479 SW |
234 | fail_glock: |
235 | gfs2_glock_dq(&ip->i_iopen_gh); | |
feaa7bba SW |
236 | fail_iopen: |
237 | gfs2_glock_put(io_gl); | |
238 | fail_put: | |
239 | ip->i_gl->gl_object = NULL; | |
240 | gfs2_glock_put(ip->i_gl); | |
241 | fail: | |
69840b0d | 242 | iget_failed(inode); |
feaa7bba | 243 | return ERR_PTR(error); |
b3b94faa DT |
244 | } |
245 | ||
af339c02 | 246 | static int gfs2_dinode_in(struct gfs2_inode *ip, const void *buf) |
ea744d01 | 247 | { |
ea744d01 | 248 | const struct gfs2_dinode *str = buf; |
719ee344 | 249 | struct timespec atime; |
9a004508 | 250 | u16 height, depth; |
ea744d01 | 251 | |
ecc30c79 SW |
252 | if (unlikely(ip->i_no_addr != be64_to_cpu(str->di_num.no_addr))) |
253 | goto corrupt; | |
dbb7cae2 | 254 | ip->i_no_formal_ino = be64_to_cpu(str->di_num.no_formal_ino); |
b60623c2 | 255 | ip->i_inode.i_mode = be32_to_cpu(str->di_mode); |
e7f14f4d | 256 | ip->i_inode.i_rdev = 0; |
b60623c2 | 257 | switch (ip->i_inode.i_mode & S_IFMT) { |
e7f14f4d SW |
258 | case S_IFBLK: |
259 | case S_IFCHR: | |
260 | ip->i_inode.i_rdev = MKDEV(be32_to_cpu(str->di_major), | |
261 | be32_to_cpu(str->di_minor)); | |
262 | break; | |
263 | }; | |
264 | ||
2933f925 SW |
265 | ip->i_inode.i_uid = be32_to_cpu(str->di_uid); |
266 | ip->i_inode.i_gid = be32_to_cpu(str->di_gid); | |
4f56110a SW |
267 | /* |
268 | * We will need to review setting the nlink count here in the | |
269 | * light of the forthcoming ro bind mount work. This is a reminder | |
270 | * to do that. | |
271 | */ | |
272 | ip->i_inode.i_nlink = be32_to_cpu(str->di_nlink); | |
c9e98886 SW |
273 | ip->i_disksize = be64_to_cpu(str->di_size); |
274 | i_size_write(&ip->i_inode, ip->i_disksize); | |
77658aad | 275 | gfs2_set_inode_blocks(&ip->i_inode, be64_to_cpu(str->di_blocks)); |
719ee344 SW |
276 | atime.tv_sec = be64_to_cpu(str->di_atime); |
277 | atime.tv_nsec = be32_to_cpu(str->di_atime_nsec); | |
278 | if (timespec_compare(&ip->i_inode.i_atime, &atime) < 0) | |
279 | ip->i_inode.i_atime = atime; | |
1a7b1eed | 280 | ip->i_inode.i_mtime.tv_sec = be64_to_cpu(str->di_mtime); |
4bd91ba1 | 281 | ip->i_inode.i_mtime.tv_nsec = be32_to_cpu(str->di_mtime_nsec); |
1a7b1eed | 282 | ip->i_inode.i_ctime.tv_sec = be64_to_cpu(str->di_ctime); |
4bd91ba1 | 283 | ip->i_inode.i_ctime.tv_nsec = be32_to_cpu(str->di_ctime_nsec); |
ea744d01 | 284 | |
ce276b06 | 285 | ip->i_goal = be64_to_cpu(str->di_goal_meta); |
bcf0b5b3 | 286 | ip->i_generation = be64_to_cpu(str->di_generation); |
ea744d01 | 287 | |
383f01fb | 288 | ip->i_diskflags = be32_to_cpu(str->di_flags); |
6b124d8d | 289 | gfs2_set_inode_flags(&ip->i_inode); |
ecc30c79 SW |
290 | height = be16_to_cpu(str->di_height); |
291 | if (unlikely(height > GFS2_MAX_META_HEIGHT)) | |
292 | goto corrupt; | |
293 | ip->i_height = (u8)height; | |
ea744d01 | 294 | |
9a004508 SW |
295 | depth = be16_to_cpu(str->di_depth); |
296 | if (unlikely(depth > GFS2_DIR_MAX_DEPTH)) | |
297 | goto corrupt; | |
298 | ip->i_depth = (u8)depth; | |
ad6203f2 | 299 | ip->i_entries = be32_to_cpu(str->di_entries); |
ea744d01 | 300 | |
3767ac21 | 301 | ip->i_eattr = be64_to_cpu(str->di_eattr); |
5561093e SW |
302 | if (S_ISREG(ip->i_inode.i_mode)) |
303 | gfs2_set_aops(&ip->i_inode); | |
304 | ||
af339c02 | 305 | return 0; |
ecc30c79 SW |
306 | corrupt: |
307 | if (gfs2_consist_inode(ip)) | |
308 | gfs2_dinode_print(ip); | |
309 | return -EIO; | |
ea744d01 SW |
310 | } |
311 | ||
b3b94faa DT |
312 | /** |
313 | * gfs2_inode_refresh - Refresh the incore copy of the dinode | |
314 | * @ip: The GFS2 inode | |
315 | * | |
316 | * Returns: errno | |
317 | */ | |
318 | ||
319 | int gfs2_inode_refresh(struct gfs2_inode *ip) | |
320 | { | |
321 | struct buffer_head *dibh; | |
322 | int error; | |
323 | ||
324 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
325 | if (error) | |
326 | return error; | |
327 | ||
feaa7bba | 328 | if (gfs2_metatype_check(GFS2_SB(&ip->i_inode), dibh, GFS2_METATYPE_DI)) { |
b3b94faa DT |
329 | brelse(dibh); |
330 | return -EIO; | |
331 | } | |
332 | ||
af339c02 | 333 | error = gfs2_dinode_in(ip, dibh->b_data); |
b3b94faa | 334 | brelse(dibh); |
bfded27b | 335 | clear_bit(GIF_INVALID, &ip->i_flags); |
b3b94faa | 336 | |
af339c02 | 337 | return error; |
b3b94faa DT |
338 | } |
339 | ||
feaa7bba | 340 | int gfs2_dinode_dealloc(struct gfs2_inode *ip) |
b3b94faa | 341 | { |
feaa7bba | 342 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa DT |
343 | struct gfs2_alloc *al; |
344 | struct gfs2_rgrpd *rgd; | |
345 | int error; | |
346 | ||
77658aad | 347 | if (gfs2_get_inode_blocks(&ip->i_inode) != 1) { |
b3b94faa | 348 | if (gfs2_consist_inode(ip)) |
4cc14f0b | 349 | gfs2_dinode_print(ip); |
b3b94faa DT |
350 | return -EIO; |
351 | } | |
352 | ||
353 | al = gfs2_alloc_get(ip); | |
182fe5ab CG |
354 | if (!al) |
355 | return -ENOMEM; | |
b3b94faa DT |
356 | |
357 | error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE); | |
358 | if (error) | |
359 | goto out; | |
360 | ||
361 | error = gfs2_rindex_hold(sdp, &al->al_ri_gh); | |
362 | if (error) | |
363 | goto out_qs; | |
364 | ||
dbb7cae2 | 365 | rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr); |
b3b94faa DT |
366 | if (!rgd) { |
367 | gfs2_consist_inode(ip); | |
368 | error = -EIO; | |
369 | goto out_rindex_relse; | |
370 | } | |
371 | ||
372 | error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, | |
373 | &al->al_rgd_gh); | |
374 | if (error) | |
375 | goto out_rindex_relse; | |
376 | ||
420b9e5e | 377 | error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_STATFS + RES_QUOTA, 1); |
b3b94faa DT |
378 | if (error) |
379 | goto out_rg_gunlock; | |
380 | ||
2bcd610d SW |
381 | set_bit(GLF_DIRTY, &ip->i_gl->gl_flags); |
382 | set_bit(GLF_LFLUSH, &ip->i_gl->gl_flags); | |
b3b94faa DT |
383 | |
384 | gfs2_free_di(rgd, ip); | |
385 | ||
b3b94faa | 386 | gfs2_trans_end(sdp); |
b3b94faa | 387 | |
feaa7bba | 388 | out_rg_gunlock: |
b3b94faa | 389 | gfs2_glock_dq_uninit(&al->al_rgd_gh); |
feaa7bba | 390 | out_rindex_relse: |
b3b94faa | 391 | gfs2_glock_dq_uninit(&al->al_ri_gh); |
feaa7bba | 392 | out_qs: |
b3b94faa | 393 | gfs2_quota_unhold(ip); |
36327521 | 394 | out: |
feaa7bba | 395 | gfs2_alloc_put(ip); |
b3b94faa DT |
396 | return error; |
397 | } | |
398 | ||
b3b94faa | 399 | /** |
87d21e07 | 400 | * gfs2_change_nlink - Change nlink count on inode |
b3b94faa DT |
401 | * @ip: The GFS2 inode |
402 | * @diff: The change in the nlink count required | |
403 | * | |
404 | * Returns: errno | |
405 | */ | |
87d21e07 | 406 | int gfs2_change_nlink(struct gfs2_inode *ip, int diff) |
b3b94faa DT |
407 | { |
408 | struct buffer_head *dibh; | |
cd915493 | 409 | u32 nlink; |
b3b94faa DT |
410 | int error; |
411 | ||
4f56110a SW |
412 | BUG_ON(diff != 1 && diff != -1); |
413 | nlink = ip->i_inode.i_nlink + diff; | |
b3b94faa DT |
414 | |
415 | /* If we are reducing the nlink count, but the new value ends up being | |
416 | bigger than the old one, we must have underflowed. */ | |
4f56110a | 417 | if (diff < 0 && nlink > ip->i_inode.i_nlink) { |
b3b94faa | 418 | if (gfs2_consist_inode(ip)) |
4cc14f0b | 419 | gfs2_dinode_print(ip); |
b3b94faa DT |
420 | return -EIO; |
421 | } | |
422 | ||
423 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
424 | if (error) | |
425 | return error; | |
426 | ||
4f56110a SW |
427 | if (diff > 0) |
428 | inc_nlink(&ip->i_inode); | |
429 | else | |
430 | drop_nlink(&ip->i_inode); | |
431 | ||
4bd91ba1 | 432 | ip->i_inode.i_ctime = CURRENT_TIME; |
b3b94faa | 433 | |
d4e9c4c3 | 434 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
539e5d6b | 435 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa | 436 | brelse(dibh); |
feaa7bba | 437 | mark_inode_dirty(&ip->i_inode); |
b3b94faa | 438 | |
87d21e07 | 439 | if (ip->i_inode.i_nlink == 0) |
ddee7608 | 440 | gfs2_unlink_di(&ip->i_inode); /* mark inode unlinked */ |
87d21e07 | 441 | |
5509826f WC |
442 | return error; |
443 | } | |
444 | ||
c752666c SW |
445 | struct inode *gfs2_lookup_simple(struct inode *dip, const char *name) |
446 | { | |
447 | struct qstr qstr; | |
6c93fd1e | 448 | struct inode *inode; |
71b86f56 | 449 | gfs2_str2qstr(&qstr, name); |
a569c711 | 450 | inode = gfs2_lookupi(dip, &qstr, 1); |
6c93fd1e RC |
451 | /* gfs2_lookupi has inconsistent callers: vfs |
452 | * related routines expect NULL for no entry found, | |
453 | * gfs2_lookup_simple callers expect ENOENT | |
454 | * and do not check for NULL. | |
455 | */ | |
456 | if (inode == NULL) | |
457 | return ERR_PTR(-ENOENT); | |
458 | else | |
459 | return inode; | |
c752666c SW |
460 | } |
461 | ||
462 | ||
b3b94faa DT |
463 | /** |
464 | * gfs2_lookupi - Look up a filename in a directory and return its inode | |
465 | * @d_gh: An initialized holder for the directory glock | |
466 | * @name: The name of the inode to look for | |
467 | * @is_root: If 1, ignore the caller's permissions | |
468 | * @i_gh: An uninitialized holder for the new inode glock | |
469 | * | |
d7c103d0 SW |
470 | * This can be called via the VFS filldir function when NFS is doing |
471 | * a readdirplus and the inode which its intending to stat isn't | |
472 | * already in cache. In this case we must not take the directory glock | |
473 | * again, since the readdir call will have already taken that lock. | |
b3b94faa DT |
474 | * |
475 | * Returns: errno | |
476 | */ | |
477 | ||
feaa7bba | 478 | struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name, |
a569c711 | 479 | int is_root) |
b3b94faa | 480 | { |
c9fd4307 | 481 | struct super_block *sb = dir->i_sb; |
feaa7bba | 482 | struct gfs2_inode *dip = GFS2_I(dir); |
b3b94faa | 483 | struct gfs2_holder d_gh; |
037bcbb7 | 484 | int error = 0; |
c752666c | 485 | struct inode *inode = NULL; |
d7c103d0 | 486 | int unlock = 0; |
b3b94faa DT |
487 | |
488 | if (!name->len || name->len > GFS2_FNAMESIZE) | |
c752666c | 489 | return ERR_PTR(-ENAMETOOLONG); |
b3b94faa | 490 | |
c752666c SW |
491 | if ((name->len == 1 && memcmp(name->name, ".", 1) == 0) || |
492 | (name->len == 2 && memcmp(name->name, "..", 2) == 0 && | |
493 | dir == sb->s_root->d_inode)) { | |
320dd101 SW |
494 | igrab(dir); |
495 | return dir; | |
b3b94faa DT |
496 | } |
497 | ||
7afd88d9 | 498 | if (gfs2_glock_is_locked_by_me(dip->i_gl) == NULL) { |
d7c103d0 SW |
499 | error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh); |
500 | if (error) | |
501 | return ERR_PTR(error); | |
502 | unlock = 1; | |
503 | } | |
b3b94faa DT |
504 | |
505 | if (!is_root) { | |
f58ba889 | 506 | error = gfs2_permission(dir, MAY_EXEC); |
b3b94faa DT |
507 | if (error) |
508 | goto out; | |
509 | } | |
510 | ||
dbb7cae2 SW |
511 | inode = gfs2_dir_search(dir, name); |
512 | if (IS_ERR(inode)) | |
513 | error = PTR_ERR(inode); | |
7359a19c | 514 | out: |
d7c103d0 SW |
515 | if (unlock) |
516 | gfs2_glock_dq_uninit(&d_gh); | |
c752666c SW |
517 | if (error == -ENOENT) |
518 | return NULL; | |
d7c103d0 | 519 | return inode ? inode : ERR_PTR(error); |
b3b94faa DT |
520 | } |
521 | ||
bb8d8a6f SW |
522 | static void gfs2_inum_range_in(struct gfs2_inum_range_host *ir, const void *buf) |
523 | { | |
524 | const struct gfs2_inum_range *str = buf; | |
525 | ||
526 | ir->ir_start = be64_to_cpu(str->ir_start); | |
527 | ir->ir_length = be64_to_cpu(str->ir_length); | |
528 | } | |
529 | ||
530 | static void gfs2_inum_range_out(const struct gfs2_inum_range_host *ir, void *buf) | |
531 | { | |
532 | struct gfs2_inum_range *str = buf; | |
533 | ||
534 | str->ir_start = cpu_to_be64(ir->ir_start); | |
535 | str->ir_length = cpu_to_be64(ir->ir_length); | |
536 | } | |
537 | ||
cd915493 | 538 | static int pick_formal_ino_1(struct gfs2_sbd *sdp, u64 *formal_ino) |
b3b94faa | 539 | { |
feaa7bba | 540 | struct gfs2_inode *ip = GFS2_I(sdp->sd_ir_inode); |
b3b94faa | 541 | struct buffer_head *bh; |
e6972647 | 542 | struct gfs2_inum_range_host ir; |
b3b94faa DT |
543 | int error; |
544 | ||
545 | error = gfs2_trans_begin(sdp, RES_DINODE, 0); | |
546 | if (error) | |
547 | return error; | |
f55ab26a | 548 | mutex_lock(&sdp->sd_inum_mutex); |
b3b94faa DT |
549 | |
550 | error = gfs2_meta_inode_buffer(ip, &bh); | |
551 | if (error) { | |
f55ab26a | 552 | mutex_unlock(&sdp->sd_inum_mutex); |
b3b94faa DT |
553 | gfs2_trans_end(sdp); |
554 | return error; | |
555 | } | |
556 | ||
557 | gfs2_inum_range_in(&ir, bh->b_data + sizeof(struct gfs2_dinode)); | |
558 | ||
559 | if (ir.ir_length) { | |
560 | *formal_ino = ir.ir_start++; | |
561 | ir.ir_length--; | |
d4e9c4c3 | 562 | gfs2_trans_add_bh(ip->i_gl, bh, 1); |
b3b94faa DT |
563 | gfs2_inum_range_out(&ir, |
564 | bh->b_data + sizeof(struct gfs2_dinode)); | |
565 | brelse(bh); | |
f55ab26a | 566 | mutex_unlock(&sdp->sd_inum_mutex); |
b3b94faa DT |
567 | gfs2_trans_end(sdp); |
568 | return 0; | |
569 | } | |
570 | ||
571 | brelse(bh); | |
572 | ||
f55ab26a | 573 | mutex_unlock(&sdp->sd_inum_mutex); |
b3b94faa DT |
574 | gfs2_trans_end(sdp); |
575 | ||
576 | return 1; | |
577 | } | |
578 | ||
cd915493 | 579 | static int pick_formal_ino_2(struct gfs2_sbd *sdp, u64 *formal_ino) |
b3b94faa | 580 | { |
feaa7bba SW |
581 | struct gfs2_inode *ip = GFS2_I(sdp->sd_ir_inode); |
582 | struct gfs2_inode *m_ip = GFS2_I(sdp->sd_inum_inode); | |
b3b94faa DT |
583 | struct gfs2_holder gh; |
584 | struct buffer_head *bh; | |
e6972647 | 585 | struct gfs2_inum_range_host ir; |
b3b94faa DT |
586 | int error; |
587 | ||
588 | error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); | |
589 | if (error) | |
590 | return error; | |
591 | ||
592 | error = gfs2_trans_begin(sdp, 2 * RES_DINODE, 0); | |
593 | if (error) | |
594 | goto out; | |
f55ab26a | 595 | mutex_lock(&sdp->sd_inum_mutex); |
b3b94faa DT |
596 | |
597 | error = gfs2_meta_inode_buffer(ip, &bh); | |
598 | if (error) | |
599 | goto out_end_trans; | |
907b9bce | 600 | |
b3b94faa DT |
601 | gfs2_inum_range_in(&ir, bh->b_data + sizeof(struct gfs2_dinode)); |
602 | ||
603 | if (!ir.ir_length) { | |
604 | struct buffer_head *m_bh; | |
cd915493 | 605 | u64 x, y; |
b44b84d7 | 606 | __be64 z; |
b3b94faa DT |
607 | |
608 | error = gfs2_meta_inode_buffer(m_ip, &m_bh); | |
609 | if (error) | |
610 | goto out_brelse; | |
611 | ||
b44b84d7 AV |
612 | z = *(__be64 *)(m_bh->b_data + sizeof(struct gfs2_dinode)); |
613 | x = y = be64_to_cpu(z); | |
b3b94faa DT |
614 | ir.ir_start = x; |
615 | ir.ir_length = GFS2_INUM_QUANTUM; | |
616 | x += GFS2_INUM_QUANTUM; | |
617 | if (x < y) | |
618 | gfs2_consist_inode(m_ip); | |
b44b84d7 | 619 | z = cpu_to_be64(x); |
d4e9c4c3 | 620 | gfs2_trans_add_bh(m_ip->i_gl, m_bh, 1); |
b44b84d7 | 621 | *(__be64 *)(m_bh->b_data + sizeof(struct gfs2_dinode)) = z; |
b3b94faa DT |
622 | |
623 | brelse(m_bh); | |
624 | } | |
625 | ||
626 | *formal_ino = ir.ir_start++; | |
627 | ir.ir_length--; | |
628 | ||
d4e9c4c3 | 629 | gfs2_trans_add_bh(ip->i_gl, bh, 1); |
b3b94faa DT |
630 | gfs2_inum_range_out(&ir, bh->b_data + sizeof(struct gfs2_dinode)); |
631 | ||
420b9e5e | 632 | out_brelse: |
b3b94faa | 633 | brelse(bh); |
420b9e5e | 634 | out_end_trans: |
f55ab26a | 635 | mutex_unlock(&sdp->sd_inum_mutex); |
b3b94faa | 636 | gfs2_trans_end(sdp); |
420b9e5e | 637 | out: |
b3b94faa | 638 | gfs2_glock_dq_uninit(&gh); |
b3b94faa DT |
639 | return error; |
640 | } | |
641 | ||
cd915493 | 642 | static int pick_formal_ino(struct gfs2_sbd *sdp, u64 *inum) |
b3b94faa DT |
643 | { |
644 | int error; | |
645 | ||
646 | error = pick_formal_ino_1(sdp, inum); | |
647 | if (error <= 0) | |
648 | return error; | |
649 | ||
650 | error = pick_formal_ino_2(sdp, inum); | |
651 | ||
652 | return error; | |
653 | } | |
654 | ||
655 | /** | |
656 | * create_ok - OK to create a new on-disk inode here? | |
657 | * @dip: Directory in which dinode is to be created | |
658 | * @name: Name of new dinode | |
659 | * @mode: | |
660 | * | |
661 | * Returns: errno | |
662 | */ | |
663 | ||
feaa7bba | 664 | static int create_ok(struct gfs2_inode *dip, const struct qstr *name, |
b3b94faa DT |
665 | unsigned int mode) |
666 | { | |
667 | int error; | |
668 | ||
f58ba889 | 669 | error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC); |
b3b94faa DT |
670 | if (error) |
671 | return error; | |
672 | ||
673 | /* Don't create entries in an unlinked directory */ | |
4f56110a | 674 | if (!dip->i_inode.i_nlink) |
b3b94faa DT |
675 | return -EPERM; |
676 | ||
dbb7cae2 | 677 | error = gfs2_dir_check(&dip->i_inode, name, NULL); |
b3b94faa DT |
678 | switch (error) { |
679 | case -ENOENT: | |
680 | error = 0; | |
681 | break; | |
682 | case 0: | |
683 | return -EEXIST; | |
684 | default: | |
685 | return error; | |
686 | } | |
687 | ||
ad6203f2 | 688 | if (dip->i_entries == (u32)-1) |
b3b94faa | 689 | return -EFBIG; |
4f56110a | 690 | if (S_ISDIR(mode) && dip->i_inode.i_nlink == (u32)-1) |
b3b94faa DT |
691 | return -EMLINK; |
692 | ||
693 | return 0; | |
694 | } | |
695 | ||
696 | static void munge_mode_uid_gid(struct gfs2_inode *dip, unsigned int *mode, | |
697 | unsigned int *uid, unsigned int *gid) | |
698 | { | |
feaa7bba | 699 | if (GFS2_SB(&dip->i_inode)->sd_args.ar_suiddir && |
2933f925 | 700 | (dip->i_inode.i_mode & S_ISUID) && dip->i_inode.i_uid) { |
b3b94faa DT |
701 | if (S_ISDIR(*mode)) |
702 | *mode |= S_ISUID; | |
3de7be33 | 703 | else if (dip->i_inode.i_uid != current_fsuid()) |
b3b94faa | 704 | *mode &= ~07111; |
2933f925 | 705 | *uid = dip->i_inode.i_uid; |
b3b94faa | 706 | } else |
3de7be33 | 707 | *uid = current_fsuid(); |
b3b94faa | 708 | |
b60623c2 | 709 | if (dip->i_inode.i_mode & S_ISGID) { |
b3b94faa DT |
710 | if (S_ISDIR(*mode)) |
711 | *mode |= S_ISGID; | |
2933f925 | 712 | *gid = dip->i_inode.i_gid; |
b3b94faa | 713 | } else |
3de7be33 | 714 | *gid = current_fsgid(); |
b3b94faa DT |
715 | } |
716 | ||
dbb7cae2 | 717 | static int alloc_dinode(struct gfs2_inode *dip, u64 *no_addr, u64 *generation) |
b3b94faa | 718 | { |
feaa7bba | 719 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); |
b3b94faa DT |
720 | int error; |
721 | ||
6dbd8224 SW |
722 | if (gfs2_alloc_get(dip) == NULL) |
723 | return -ENOMEM; | |
b3b94faa | 724 | |
6dbd8224 | 725 | dip->i_alloc->al_requested = RES_DINODE; |
b3b94faa DT |
726 | error = gfs2_inplace_reserve(dip); |
727 | if (error) | |
728 | goto out; | |
729 | ||
feaa7bba | 730 | error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_STATFS, 0); |
b3b94faa DT |
731 | if (error) |
732 | goto out_ipreserv; | |
733 | ||
dbb7cae2 | 734 | *no_addr = gfs2_alloc_di(dip, generation); |
b3b94faa DT |
735 | |
736 | gfs2_trans_end(sdp); | |
737 | ||
4340fe62 | 738 | out_ipreserv: |
b3b94faa | 739 | gfs2_inplace_release(dip); |
4340fe62 | 740 | out: |
b3b94faa | 741 | gfs2_alloc_put(dip); |
b3b94faa DT |
742 | return error; |
743 | } | |
744 | ||
745 | /** | |
746 | * init_dinode - Fill in a new dinode structure | |
747 | * @dip: the directory this inode is being created in | |
748 | * @gl: The glock covering the new inode | |
749 | * @inum: the inode number | |
750 | * @mode: the file permissions | |
751 | * @uid: | |
752 | * @gid: | |
753 | * | |
754 | */ | |
755 | ||
756 | static void init_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl, | |
629a21e7 | 757 | const struct gfs2_inum_host *inum, unsigned int mode, |
4340fe62 | 758 | unsigned int uid, unsigned int gid, |
e9bd2b3b | 759 | const u64 *generation, dev_t dev, struct buffer_head **bhp) |
b3b94faa | 760 | { |
feaa7bba | 761 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); |
b96ca4fa | 762 | struct gfs2_dinode *di; |
b3b94faa | 763 | struct buffer_head *dibh; |
4bd91ba1 | 764 | struct timespec tv = CURRENT_TIME; |
b3b94faa DT |
765 | |
766 | dibh = gfs2_meta_new(gl, inum->no_addr); | |
d4e9c4c3 | 767 | gfs2_trans_add_bh(gl, dibh, 1); |
b3b94faa DT |
768 | gfs2_metatype_set(dibh, GFS2_METATYPE_DI, GFS2_FORMAT_DI); |
769 | gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode)); | |
b96ca4fa SW |
770 | di = (struct gfs2_dinode *)dibh->b_data; |
771 | ||
2442a098 SW |
772 | di->di_num.no_formal_ino = cpu_to_be64(inum->no_formal_ino); |
773 | di->di_num.no_addr = cpu_to_be64(inum->no_addr); | |
b96ca4fa SW |
774 | di->di_mode = cpu_to_be32(mode); |
775 | di->di_uid = cpu_to_be32(uid); | |
776 | di->di_gid = cpu_to_be32(gid); | |
294caaa3 SW |
777 | di->di_nlink = 0; |
778 | di->di_size = 0; | |
b96ca4fa | 779 | di->di_blocks = cpu_to_be64(1); |
4bd91ba1 | 780 | di->di_atime = di->di_mtime = di->di_ctime = cpu_to_be64(tv.tv_sec); |
e7f14f4d SW |
781 | di->di_major = cpu_to_be32(MAJOR(dev)); |
782 | di->di_minor = cpu_to_be32(MINOR(dev)); | |
b96ca4fa | 783 | di->di_goal_meta = di->di_goal_data = cpu_to_be64(inum->no_addr); |
4340fe62 | 784 | di->di_generation = cpu_to_be64(*generation); |
294caaa3 | 785 | di->di_flags = 0; |
b3b94faa DT |
786 | |
787 | if (S_ISREG(mode)) { | |
383f01fb | 788 | if ((dip->i_diskflags & GFS2_DIF_INHERIT_JDATA) || |
b3b94faa | 789 | gfs2_tune_get(sdp, gt_new_files_jdata)) |
b96ca4fa | 790 | di->di_flags |= cpu_to_be32(GFS2_DIF_JDATA); |
b3b94faa | 791 | } else if (S_ISDIR(mode)) { |
383f01fb | 792 | di->di_flags |= cpu_to_be32(dip->i_diskflags & |
568f4c96 | 793 | GFS2_DIF_INHERIT_JDATA); |
b3b94faa DT |
794 | } |
795 | ||
b96ca4fa | 796 | di->__pad1 = 0; |
a9583c79 | 797 | di->di_payload_format = cpu_to_be32(S_ISDIR(mode) ? GFS2_FORMAT_DE : 0); |
294caaa3 | 798 | di->di_height = 0; |
b96ca4fa SW |
799 | di->__pad2 = 0; |
800 | di->__pad3 = 0; | |
294caaa3 SW |
801 | di->di_depth = 0; |
802 | di->di_entries = 0; | |
b96ca4fa | 803 | memset(&di->__pad4, 0, sizeof(di->__pad4)); |
294caaa3 | 804 | di->di_eattr = 0; |
4bd91ba1 SW |
805 | di->di_atime_nsec = cpu_to_be32(tv.tv_nsec); |
806 | di->di_mtime_nsec = cpu_to_be32(tv.tv_nsec); | |
807 | di->di_ctime_nsec = cpu_to_be32(tv.tv_nsec); | |
b96ca4fa | 808 | memset(&di->di_reserved, 0, sizeof(di->di_reserved)); |
e9bd2b3b WC |
809 | |
810 | set_buffer_uptodate(dibh); | |
b96ca4fa | 811 | |
e9bd2b3b | 812 | *bhp = dibh; |
b3b94faa DT |
813 | } |
814 | ||
815 | static int make_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl, | |
629a21e7 | 816 | unsigned int mode, const struct gfs2_inum_host *inum, |
e9bd2b3b | 817 | const u64 *generation, dev_t dev, struct buffer_head **bhp) |
b3b94faa | 818 | { |
feaa7bba | 819 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); |
b3b94faa DT |
820 | unsigned int uid, gid; |
821 | int error; | |
822 | ||
823 | munge_mode_uid_gid(dip, &mode, &uid, &gid); | |
182fe5ab CG |
824 | if (!gfs2_alloc_get(dip)) |
825 | return -ENOMEM; | |
b3b94faa DT |
826 | |
827 | error = gfs2_quota_lock(dip, uid, gid); | |
828 | if (error) | |
829 | goto out; | |
830 | ||
831 | error = gfs2_quota_check(dip, uid, gid); | |
832 | if (error) | |
833 | goto out_quota; | |
834 | ||
feaa7bba | 835 | error = gfs2_trans_begin(sdp, RES_DINODE + RES_QUOTA, 0); |
b3b94faa DT |
836 | if (error) |
837 | goto out_quota; | |
838 | ||
e9bd2b3b | 839 | init_dinode(dip, gl, inum, mode, uid, gid, generation, dev, bhp); |
b3b94faa | 840 | gfs2_quota_change(dip, +1, uid, gid); |
b3b94faa DT |
841 | gfs2_trans_end(sdp); |
842 | ||
feaa7bba | 843 | out_quota: |
b3b94faa | 844 | gfs2_quota_unlock(dip); |
feaa7bba | 845 | out: |
b3b94faa | 846 | gfs2_alloc_put(dip); |
b3b94faa DT |
847 | return error; |
848 | } | |
849 | ||
feaa7bba SW |
850 | static int link_dinode(struct gfs2_inode *dip, const struct qstr *name, |
851 | struct gfs2_inode *ip) | |
b3b94faa | 852 | { |
feaa7bba | 853 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); |
b3b94faa DT |
854 | struct gfs2_alloc *al; |
855 | int alloc_required; | |
856 | struct buffer_head *dibh; | |
857 | int error; | |
858 | ||
859 | al = gfs2_alloc_get(dip); | |
182fe5ab CG |
860 | if (!al) |
861 | return -ENOMEM; | |
b3b94faa DT |
862 | |
863 | error = gfs2_quota_lock(dip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE); | |
864 | if (error) | |
865 | goto fail; | |
866 | ||
feaa7bba | 867 | error = alloc_required = gfs2_diradd_alloc_required(&dip->i_inode, name); |
c752666c | 868 | if (alloc_required < 0) |
1b8177ec | 869 | goto fail_quota_locks; |
b3b94faa | 870 | if (alloc_required) { |
2933f925 | 871 | error = gfs2_quota_check(dip, dip->i_inode.i_uid, dip->i_inode.i_gid); |
b3b94faa DT |
872 | if (error) |
873 | goto fail_quota_locks; | |
874 | ||
875 | al->al_requested = sdp->sd_max_dirres; | |
876 | ||
877 | error = gfs2_inplace_reserve(dip); | |
878 | if (error) | |
879 | goto fail_quota_locks; | |
880 | ||
320dd101 | 881 | error = gfs2_trans_begin(sdp, sdp->sd_max_dirres + |
bb8d8a6f | 882 | al->al_rgd->rd_length + |
907b9bce | 883 | 2 * RES_DINODE + |
b3b94faa DT |
884 | RES_STATFS + RES_QUOTA, 0); |
885 | if (error) | |
886 | goto fail_ipreserv; | |
887 | } else { | |
feaa7bba | 888 | error = gfs2_trans_begin(sdp, RES_LEAF + 2 * RES_DINODE, 0); |
b3b94faa DT |
889 | if (error) |
890 | goto fail_quota_locks; | |
891 | } | |
892 | ||
dbb7cae2 | 893 | error = gfs2_dir_add(&dip->i_inode, name, ip, IF2DT(ip->i_inode.i_mode)); |
b3b94faa DT |
894 | if (error) |
895 | goto fail_end_trans; | |
896 | ||
897 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
898 | if (error) | |
899 | goto fail_end_trans; | |
4f56110a | 900 | ip->i_inode.i_nlink = 1; |
d4e9c4c3 | 901 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
539e5d6b | 902 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa | 903 | brelse(dibh); |
b3b94faa DT |
904 | return 0; |
905 | ||
320dd101 | 906 | fail_end_trans: |
b3b94faa DT |
907 | gfs2_trans_end(sdp); |
908 | ||
320dd101 | 909 | fail_ipreserv: |
6dbd8224 | 910 | if (dip->i_alloc->al_rgd) |
b3b94faa DT |
911 | gfs2_inplace_release(dip); |
912 | ||
320dd101 | 913 | fail_quota_locks: |
b3b94faa DT |
914 | gfs2_quota_unlock(dip); |
915 | ||
320dd101 | 916 | fail: |
b3b94faa | 917 | gfs2_alloc_put(dip); |
b3b94faa DT |
918 | return error; |
919 | } | |
920 | ||
fcb47e0b RH |
921 | static int gfs2_security_init(struct gfs2_inode *dip, struct gfs2_inode *ip) |
922 | { | |
923 | int err; | |
924 | size_t len; | |
925 | void *value; | |
926 | char *name; | |
927 | struct gfs2_ea_request er; | |
928 | ||
929 | err = security_inode_init_security(&ip->i_inode, &dip->i_inode, | |
930 | &name, &value, &len); | |
931 | ||
932 | if (err) { | |
933 | if (err == -EOPNOTSUPP) | |
934 | return 0; | |
935 | return err; | |
936 | } | |
937 | ||
938 | memset(&er, 0, sizeof(struct gfs2_ea_request)); | |
939 | ||
940 | er.er_type = GFS2_EATYPE_SECURITY; | |
941 | er.er_name = name; | |
942 | er.er_data = value; | |
943 | er.er_name_len = strlen(name); | |
944 | er.er_data_len = len; | |
945 | ||
946 | err = gfs2_ea_set_i(ip, &er); | |
947 | ||
948 | kfree(value); | |
949 | kfree(name); | |
950 | ||
951 | return err; | |
952 | } | |
953 | ||
b3b94faa DT |
954 | /** |
955 | * gfs2_createi - Create a new inode | |
956 | * @ghs: An array of two holders | |
957 | * @name: The name of the new file | |
958 | * @mode: the permissions on the new inode | |
959 | * | |
960 | * @ghs[0] is an initialized holder for the directory | |
961 | * @ghs[1] is the holder for the inode lock | |
962 | * | |
7359a19c | 963 | * If the return value is not NULL, the glocks on both the directory and the new |
b3b94faa DT |
964 | * file are held. A transaction has been started and an inplace reservation |
965 | * is held, as well. | |
966 | * | |
7359a19c | 967 | * Returns: An inode |
b3b94faa DT |
968 | */ |
969 | ||
feaa7bba | 970 | struct inode *gfs2_createi(struct gfs2_holder *ghs, const struct qstr *name, |
e7f14f4d | 971 | unsigned int mode, dev_t dev) |
b3b94faa | 972 | { |
e1cc8603 | 973 | struct inode *inode = NULL; |
5c676f6d | 974 | struct gfs2_inode *dip = ghs->gh_gl->gl_object; |
feaa7bba SW |
975 | struct inode *dir = &dip->i_inode; |
976 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); | |
dbb7cae2 | 977 | struct gfs2_inum_host inum = { .no_addr = 0, .no_formal_ino = 0 }; |
b3b94faa | 978 | int error; |
4340fe62 | 979 | u64 generation; |
f91a0d3e | 980 | struct buffer_head *bh = NULL; |
b3b94faa DT |
981 | |
982 | if (!name->len || name->len > GFS2_FNAMESIZE) | |
7359a19c | 983 | return ERR_PTR(-ENAMETOOLONG); |
b3b94faa | 984 | |
b3b94faa DT |
985 | gfs2_holder_reinit(LM_ST_EXCLUSIVE, 0, ghs); |
986 | error = gfs2_glock_nq(ghs); | |
987 | if (error) | |
988 | goto fail; | |
989 | ||
990 | error = create_ok(dip, name, mode); | |
991 | if (error) | |
992 | goto fail_gunlock; | |
993 | ||
feaa7bba | 994 | error = pick_formal_ino(sdp, &inum.no_formal_ino); |
b3b94faa DT |
995 | if (error) |
996 | goto fail_gunlock; | |
997 | ||
dbb7cae2 | 998 | error = alloc_dinode(dip, &inum.no_addr, &generation); |
b3b94faa DT |
999 | if (error) |
1000 | goto fail_gunlock; | |
1001 | ||
28626e20 SW |
1002 | error = gfs2_glock_nq_num(sdp, inum.no_addr, &gfs2_inode_glops, |
1003 | LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1); | |
1004 | if (error) | |
1005 | goto fail_gunlock; | |
b3b94faa | 1006 | |
e9bd2b3b | 1007 | error = make_dinode(dip, ghs[1].gh_gl, mode, &inum, &generation, dev, &bh); |
b3b94faa DT |
1008 | if (error) |
1009 | goto fail_gunlock2; | |
1010 | ||
bb9bcf06 WC |
1011 | inode = gfs2_inode_lookup(dir->i_sb, IF2DT(mode), |
1012 | inum.no_addr, | |
7a9f53b3 | 1013 | inum.no_formal_ino, 0); |
feaa7bba | 1014 | if (IS_ERR(inode)) |
b3b94faa DT |
1015 | goto fail_gunlock2; |
1016 | ||
feaa7bba | 1017 | error = gfs2_inode_refresh(GFS2_I(inode)); |
b3b94faa | 1018 | if (error) |
e1cc8603 | 1019 | goto fail_gunlock2; |
b3b94faa | 1020 | |
feaa7bba | 1021 | error = gfs2_acl_create(dip, GFS2_I(inode)); |
b3b94faa | 1022 | if (error) |
e1cc8603 | 1023 | goto fail_gunlock2; |
b3b94faa | 1024 | |
fcb47e0b RH |
1025 | error = gfs2_security_init(dip, GFS2_I(inode)); |
1026 | if (error) | |
e1cc8603 | 1027 | goto fail_gunlock2; |
fcb47e0b | 1028 | |
feaa7bba | 1029 | error = link_dinode(dip, name, GFS2_I(inode)); |
b3b94faa | 1030 | if (error) |
e1cc8603 | 1031 | goto fail_gunlock2; |
b3b94faa | 1032 | |
f91a0d3e SW |
1033 | if (bh) |
1034 | brelse(bh); | |
7359a19c | 1035 | return inode; |
b3b94faa | 1036 | |
320dd101 | 1037 | fail_gunlock2: |
b3b94faa | 1038 | gfs2_glock_dq_uninit(ghs + 1); |
bd1eb881 | 1039 | if (inode && !IS_ERR(inode)) |
e1cc8603 | 1040 | iput(inode); |
320dd101 | 1041 | fail_gunlock: |
b3b94faa | 1042 | gfs2_glock_dq(ghs); |
320dd101 | 1043 | fail: |
f91a0d3e SW |
1044 | if (bh) |
1045 | brelse(bh); | |
7359a19c | 1046 | return ERR_PTR(error); |
b3b94faa DT |
1047 | } |
1048 | ||
b3b94faa DT |
1049 | /** |
1050 | * gfs2_rmdiri - Remove a directory | |
1051 | * @dip: The parent directory of the directory to be removed | |
1052 | * @name: The name of the directory to be removed | |
1053 | * @ip: The GFS2 inode of the directory to be removed | |
1054 | * | |
1055 | * Assumes Glocks on dip and ip are held | |
1056 | * | |
1057 | * Returns: errno | |
1058 | */ | |
1059 | ||
feaa7bba SW |
1060 | int gfs2_rmdiri(struct gfs2_inode *dip, const struct qstr *name, |
1061 | struct gfs2_inode *ip) | |
b3b94faa | 1062 | { |
b3b94faa DT |
1063 | struct qstr dotname; |
1064 | int error; | |
1065 | ||
ad6203f2 | 1066 | if (ip->i_entries != 2) { |
b3b94faa | 1067 | if (gfs2_consist_inode(ip)) |
4cc14f0b | 1068 | gfs2_dinode_print(ip); |
b3b94faa DT |
1069 | return -EIO; |
1070 | } | |
1071 | ||
1072 | error = gfs2_dir_del(dip, name); | |
1073 | if (error) | |
1074 | return error; | |
1075 | ||
1076 | error = gfs2_change_nlink(dip, -1); | |
1077 | if (error) | |
1078 | return error; | |
1079 | ||
71b86f56 | 1080 | gfs2_str2qstr(&dotname, "."); |
b3b94faa DT |
1081 | error = gfs2_dir_del(ip, &dotname); |
1082 | if (error) | |
1083 | return error; | |
1084 | ||
feaa7bba | 1085 | gfs2_str2qstr(&dotname, ".."); |
b3b94faa DT |
1086 | error = gfs2_dir_del(ip, &dotname); |
1087 | if (error) | |
1088 | return error; | |
1089 | ||
4f56110a SW |
1090 | /* It looks odd, but it really should be done twice */ |
1091 | error = gfs2_change_nlink(ip, -1); | |
1092 | if (error) | |
1093 | return error; | |
1094 | ||
1095 | error = gfs2_change_nlink(ip, -1); | |
b3b94faa DT |
1096 | if (error) |
1097 | return error; | |
1098 | ||
b3b94faa DT |
1099 | return error; |
1100 | } | |
1101 | ||
1102 | /* | |
1103 | * gfs2_unlink_ok - check to see that a inode is still in a directory | |
1104 | * @dip: the directory | |
1105 | * @name: the name of the file | |
1106 | * @ip: the inode | |
1107 | * | |
1108 | * Assumes that the lock on (at least) @dip is held. | |
1109 | * | |
1110 | * Returns: 0 if the parent/child relationship is correct, errno if it isn't | |
1111 | */ | |
1112 | ||
feaa7bba | 1113 | int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name, |
dbb7cae2 | 1114 | const struct gfs2_inode *ip) |
b3b94faa | 1115 | { |
b3b94faa DT |
1116 | int error; |
1117 | ||
feaa7bba | 1118 | if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode)) |
b3b94faa DT |
1119 | return -EPERM; |
1120 | ||
b60623c2 | 1121 | if ((dip->i_inode.i_mode & S_ISVTX) && |
3de7be33 DH |
1122 | dip->i_inode.i_uid != current_fsuid() && |
1123 | ip->i_inode.i_uid != current_fsuid() && !capable(CAP_FOWNER)) | |
b3b94faa DT |
1124 | return -EPERM; |
1125 | ||
feaa7bba | 1126 | if (IS_APPEND(&dip->i_inode)) |
b3b94faa DT |
1127 | return -EPERM; |
1128 | ||
f58ba889 | 1129 | error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC); |
b3b94faa DT |
1130 | if (error) |
1131 | return error; | |
1132 | ||
dbb7cae2 | 1133 | error = gfs2_dir_check(&dip->i_inode, name, ip); |
b3b94faa DT |
1134 | if (error) |
1135 | return error; | |
1136 | ||
b3b94faa DT |
1137 | return 0; |
1138 | } | |
1139 | ||
b3b94faa DT |
1140 | /** |
1141 | * gfs2_readlinki - return the contents of a symlink | |
1142 | * @ip: the symlink's inode | |
1143 | * @buf: a pointer to the buffer to be filled | |
1144 | * @len: a pointer to the length of @buf | |
1145 | * | |
1146 | * If @buf is too small, a piece of memory is kmalloc()ed and needs | |
1147 | * to be freed by the caller. | |
1148 | * | |
1149 | * Returns: errno | |
1150 | */ | |
1151 | ||
1152 | int gfs2_readlinki(struct gfs2_inode *ip, char **buf, unsigned int *len) | |
1153 | { | |
1154 | struct gfs2_holder i_gh; | |
1155 | struct buffer_head *dibh; | |
1156 | unsigned int x; | |
1157 | int error; | |
1158 | ||
719ee344 SW |
1159 | gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh); |
1160 | error = gfs2_glock_nq(&i_gh); | |
b3b94faa DT |
1161 | if (error) { |
1162 | gfs2_holder_uninit(&i_gh); | |
1163 | return error; | |
1164 | } | |
1165 | ||
c9e98886 | 1166 | if (!ip->i_disksize) { |
b3b94faa DT |
1167 | gfs2_consist_inode(ip); |
1168 | error = -EIO; | |
1169 | goto out; | |
1170 | } | |
1171 | ||
1172 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1173 | if (error) | |
1174 | goto out; | |
1175 | ||
c9e98886 | 1176 | x = ip->i_disksize + 1; |
b3b94faa | 1177 | if (x > *len) { |
16c5f06f | 1178 | *buf = kmalloc(x, GFP_NOFS); |
b3b94faa DT |
1179 | if (!*buf) { |
1180 | error = -ENOMEM; | |
1181 | goto out_brelse; | |
1182 | } | |
1183 | } | |
1184 | ||
1185 | memcpy(*buf, dibh->b_data + sizeof(struct gfs2_dinode), x); | |
1186 | *len = x; | |
1187 | ||
feaa7bba | 1188 | out_brelse: |
b3b94faa | 1189 | brelse(dibh); |
feaa7bba | 1190 | out: |
b3b94faa | 1191 | gfs2_glock_dq_uninit(&i_gh); |
b3b94faa DT |
1192 | return error; |
1193 | } | |
1194 | ||
b3b94faa DT |
1195 | static int |
1196 | __gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr) | |
1197 | { | |
1198 | struct buffer_head *dibh; | |
1199 | int error; | |
1200 | ||
1201 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1202 | if (!error) { | |
feaa7bba SW |
1203 | error = inode_setattr(&ip->i_inode, attr); |
1204 | gfs2_assert_warn(GFS2_SB(&ip->i_inode), !error); | |
d4e9c4c3 | 1205 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
539e5d6b | 1206 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa DT |
1207 | brelse(dibh); |
1208 | } | |
1209 | return error; | |
1210 | } | |
1211 | ||
1212 | /** | |
1213 | * gfs2_setattr_simple - | |
1214 | * @ip: | |
1215 | * @attr: | |
1216 | * | |
1217 | * Called with a reference on the vnode. | |
1218 | * | |
1219 | * Returns: errno | |
1220 | */ | |
1221 | ||
1222 | int gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr) | |
1223 | { | |
1224 | int error; | |
1225 | ||
5c676f6d | 1226 | if (current->journal_info) |
b3b94faa DT |
1227 | return __gfs2_setattr_simple(ip, attr); |
1228 | ||
feaa7bba | 1229 | error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE, 0); |
b3b94faa DT |
1230 | if (error) |
1231 | return error; | |
1232 | ||
1233 | error = __gfs2_setattr_simple(ip, attr); | |
feaa7bba | 1234 | gfs2_trans_end(GFS2_SB(&ip->i_inode)); |
b3b94faa DT |
1235 | return error; |
1236 | } | |
1237 | ||
bb8d8a6f SW |
1238 | void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf) |
1239 | { | |
bb8d8a6f SW |
1240 | struct gfs2_dinode *str = buf; |
1241 | ||
1242 | str->di_header.mh_magic = cpu_to_be32(GFS2_MAGIC); | |
1243 | str->di_header.mh_type = cpu_to_be32(GFS2_METATYPE_DI); | |
1244 | str->di_header.__pad0 = 0; | |
1245 | str->di_header.mh_format = cpu_to_be32(GFS2_FORMAT_DI); | |
1246 | str->di_header.__pad1 = 0; | |
1247 | str->di_num.no_addr = cpu_to_be64(ip->i_no_addr); | |
1248 | str->di_num.no_formal_ino = cpu_to_be64(ip->i_no_formal_ino); | |
1249 | str->di_mode = cpu_to_be32(ip->i_inode.i_mode); | |
1250 | str->di_uid = cpu_to_be32(ip->i_inode.i_uid); | |
1251 | str->di_gid = cpu_to_be32(ip->i_inode.i_gid); | |
1252 | str->di_nlink = cpu_to_be32(ip->i_inode.i_nlink); | |
c9e98886 | 1253 | str->di_size = cpu_to_be64(ip->i_disksize); |
77658aad | 1254 | str->di_blocks = cpu_to_be64(gfs2_get_inode_blocks(&ip->i_inode)); |
bb8d8a6f SW |
1255 | str->di_atime = cpu_to_be64(ip->i_inode.i_atime.tv_sec); |
1256 | str->di_mtime = cpu_to_be64(ip->i_inode.i_mtime.tv_sec); | |
1257 | str->di_ctime = cpu_to_be64(ip->i_inode.i_ctime.tv_sec); | |
1258 | ||
ce276b06 SW |
1259 | str->di_goal_meta = cpu_to_be64(ip->i_goal); |
1260 | str->di_goal_data = cpu_to_be64(ip->i_goal); | |
bcf0b5b3 | 1261 | str->di_generation = cpu_to_be64(ip->i_generation); |
bb8d8a6f | 1262 | |
383f01fb | 1263 | str->di_flags = cpu_to_be32(ip->i_diskflags); |
ecc30c79 | 1264 | str->di_height = cpu_to_be16(ip->i_height); |
bb8d8a6f | 1265 | str->di_payload_format = cpu_to_be32(S_ISDIR(ip->i_inode.i_mode) && |
383f01fb | 1266 | !(ip->i_diskflags & GFS2_DIF_EXHASH) ? |
bb8d8a6f | 1267 | GFS2_FORMAT_DE : 0); |
9a004508 | 1268 | str->di_depth = cpu_to_be16(ip->i_depth); |
ad6203f2 | 1269 | str->di_entries = cpu_to_be32(ip->i_entries); |
bb8d8a6f | 1270 | |
3767ac21 | 1271 | str->di_eattr = cpu_to_be64(ip->i_eattr); |
4bd91ba1 SW |
1272 | str->di_atime_nsec = cpu_to_be32(ip->i_inode.i_atime.tv_nsec); |
1273 | str->di_mtime_nsec = cpu_to_be32(ip->i_inode.i_mtime.tv_nsec); | |
1274 | str->di_ctime_nsec = cpu_to_be32(ip->i_inode.i_ctime.tv_nsec); | |
bb8d8a6f SW |
1275 | } |
1276 | ||
1277 | void gfs2_dinode_print(const struct gfs2_inode *ip) | |
1278 | { | |
bb8d8a6f SW |
1279 | printk(KERN_INFO " no_formal_ino = %llu\n", |
1280 | (unsigned long long)ip->i_no_formal_ino); | |
1281 | printk(KERN_INFO " no_addr = %llu\n", | |
1282 | (unsigned long long)ip->i_no_addr); | |
c9e98886 SW |
1283 | printk(KERN_INFO " i_disksize = %llu\n", |
1284 | (unsigned long long)ip->i_disksize); | |
77658aad SW |
1285 | printk(KERN_INFO " blocks = %llu\n", |
1286 | (unsigned long long)gfs2_get_inode_blocks(&ip->i_inode)); | |
ce276b06 SW |
1287 | printk(KERN_INFO " i_goal = %llu\n", |
1288 | (unsigned long long)ip->i_goal); | |
383f01fb | 1289 | printk(KERN_INFO " i_diskflags = 0x%.8X\n", ip->i_diskflags); |
ca390601 | 1290 | printk(KERN_INFO " i_height = %u\n", ip->i_height); |
9a004508 | 1291 | printk(KERN_INFO " i_depth = %u\n", ip->i_depth); |
ad6203f2 | 1292 | printk(KERN_INFO " i_entries = %u\n", ip->i_entries); |
3767ac21 SW |
1293 | printk(KERN_INFO " i_eattr = %llu\n", |
1294 | (unsigned long long)ip->i_eattr); | |
bb8d8a6f SW |
1295 | } |
1296 |