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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> |
7d308590 | 19 | #include <linux/lm_interface.h> |
fcb47e0b | 20 | #include <linux/security.h> |
719ee344 | 21 | #include <linux/time.h> |
b3b94faa DT |
22 | |
23 | #include "gfs2.h" | |
5c676f6d | 24 | #include "incore.h" |
b3b94faa DT |
25 | #include "acl.h" |
26 | #include "bmap.h" | |
27 | #include "dir.h" | |
28 | #include "eattr.h" | |
29 | #include "glock.h" | |
30 | #include "glops.h" | |
31 | #include "inode.h" | |
32 | #include "log.h" | |
33 | #include "meta_io.h" | |
34 | #include "ops_address.h" | |
b3b94faa DT |
35 | #include "quota.h" |
36 | #include "rgrp.h" | |
37 | #include "trans.h" | |
5c676f6d | 38 | #include "util.h" |
b3b94faa | 39 | |
bb8d8a6f SW |
40 | struct gfs2_inum_range_host { |
41 | u64 ir_start; | |
42 | u64 ir_length; | |
43 | }; | |
44 | ||
feaa7bba SW |
45 | static int iget_test(struct inode *inode, void *opaque) |
46 | { | |
47 | struct gfs2_inode *ip = GFS2_I(inode); | |
dbb7cae2 | 48 | u64 *no_addr = opaque; |
feaa7bba | 49 | |
091806ed | 50 | if (ip->i_no_addr == *no_addr && test_bit(GIF_USER, &ip->i_flags)) |
feaa7bba | 51 | return 1; |
b3b94faa | 52 | |
feaa7bba SW |
53 | return 0; |
54 | } | |
55 | ||
56 | static int iget_set(struct inode *inode, void *opaque) | |
b3b94faa | 57 | { |
feaa7bba | 58 | struct gfs2_inode *ip = GFS2_I(inode); |
dbb7cae2 | 59 | u64 *no_addr = opaque; |
b3b94faa | 60 | |
dbb7cae2 SW |
61 | inode->i_ino = (unsigned long)*no_addr; |
62 | ip->i_no_addr = *no_addr; | |
091806ed | 63 | set_bit(GIF_USER, &ip->i_flags); |
feaa7bba SW |
64 | return 0; |
65 | } | |
b3b94faa | 66 | |
dbb7cae2 | 67 | struct inode *gfs2_ilookup(struct super_block *sb, u64 no_addr) |
feaa7bba | 68 | { |
dbb7cae2 SW |
69 | unsigned long hash = (unsigned long)no_addr; |
70 | return ilookup5(sb, hash, iget_test, &no_addr); | |
feaa7bba | 71 | } |
b3b94faa | 72 | |
dbb7cae2 | 73 | static struct inode *gfs2_iget(struct super_block *sb, u64 no_addr) |
feaa7bba | 74 | { |
dbb7cae2 SW |
75 | unsigned long hash = (unsigned long)no_addr; |
76 | return iget5_locked(sb, hash, iget_test, iget_set, &no_addr); | |
b3b94faa DT |
77 | } |
78 | ||
7a9f53b3 BM |
79 | struct gfs2_skip_data { |
80 | u64 no_addr; | |
81 | int skipped; | |
82 | }; | |
83 | ||
84 | static int iget_skip_test(struct inode *inode, void *opaque) | |
85 | { | |
86 | struct gfs2_inode *ip = GFS2_I(inode); | |
87 | struct gfs2_skip_data *data = opaque; | |
88 | ||
091806ed | 89 | if (ip->i_no_addr == data->no_addr && test_bit(GIF_USER, &ip->i_flags)){ |
7a9f53b3 BM |
90 | if (inode->i_state & (I_FREEING|I_CLEAR|I_WILL_FREE)){ |
91 | data->skipped = 1; | |
92 | return 0; | |
93 | } | |
94 | return 1; | |
95 | } | |
96 | return 0; | |
97 | } | |
98 | ||
99 | static int iget_skip_set(struct inode *inode, void *opaque) | |
100 | { | |
101 | struct gfs2_inode *ip = GFS2_I(inode); | |
102 | struct gfs2_skip_data *data = opaque; | |
103 | ||
104 | if (data->skipped) | |
105 | return 1; | |
106 | inode->i_ino = (unsigned long)(data->no_addr); | |
107 | ip->i_no_addr = data->no_addr; | |
091806ed | 108 | set_bit(GIF_USER, &ip->i_flags); |
7a9f53b3 BM |
109 | return 0; |
110 | } | |
111 | ||
112 | static struct inode *gfs2_iget_skip(struct super_block *sb, | |
113 | u64 no_addr) | |
114 | { | |
115 | struct gfs2_skip_data data; | |
116 | unsigned long hash = (unsigned long)no_addr; | |
117 | ||
118 | data.no_addr = no_addr; | |
119 | data.skipped = 0; | |
120 | return iget5_locked(sb, hash, iget_skip_test, iget_skip_set, &data); | |
121 | } | |
122 | ||
35dcc52e WC |
123 | /** |
124 | * GFS2 lookup code fills in vfs inode contents based on info obtained | |
125 | * from directory entry inside gfs2_inode_lookup(). This has caused issues | |
126 | * with NFS code path since its get_dentry routine doesn't have the relevant | |
127 | * directory entry when gfs2_inode_lookup() is invoked. Part of the code | |
128 | * segment inside gfs2_inode_lookup code needs to get moved around. | |
129 | * | |
130 | * Clean up I_LOCK and I_NEW as well. | |
131 | **/ | |
132 | ||
133 | void gfs2_set_iop(struct inode *inode) | |
134 | { | |
c97bfe43 | 135 | struct gfs2_sbd *sdp = GFS2_SB(inode); |
35dcc52e WC |
136 | umode_t mode = inode->i_mode; |
137 | ||
138 | if (S_ISREG(mode)) { | |
139 | inode->i_op = &gfs2_file_iops; | |
c97bfe43 WC |
140 | if (sdp->sd_args.ar_localflocks) |
141 | inode->i_fop = &gfs2_file_fops_nolock; | |
142 | else | |
143 | inode->i_fop = &gfs2_file_fops; | |
35dcc52e WC |
144 | } else if (S_ISDIR(mode)) { |
145 | inode->i_op = &gfs2_dir_iops; | |
c97bfe43 WC |
146 | if (sdp->sd_args.ar_localflocks) |
147 | inode->i_fop = &gfs2_dir_fops_nolock; | |
148 | else | |
149 | inode->i_fop = &gfs2_dir_fops; | |
35dcc52e WC |
150 | } else if (S_ISLNK(mode)) { |
151 | inode->i_op = &gfs2_symlink_iops; | |
152 | } else { | |
d83225d4 | 153 | inode->i_op = &gfs2_file_iops; |
43a33c53 | 154 | init_special_inode(inode, inode->i_mode, inode->i_rdev); |
35dcc52e WC |
155 | } |
156 | ||
157 | unlock_new_inode(inode); | |
158 | } | |
159 | ||
b3b94faa | 160 | /** |
feaa7bba SW |
161 | * gfs2_inode_lookup - Lookup an inode |
162 | * @sb: The super block | |
dbb7cae2 | 163 | * @no_addr: The inode number |
feaa7bba | 164 | * @type: The type of the inode |
7a9f53b3 | 165 | * @skip_freeing: set this not return an inode if it is currently being freed. |
b3b94faa | 166 | * |
feaa7bba | 167 | * Returns: A VFS inode, or an error |
b3b94faa DT |
168 | */ |
169 | ||
091806ed | 170 | struct inode *gfs2_inode_lookup(struct super_block *sb, |
bb9bcf06 WC |
171 | unsigned int type, |
172 | u64 no_addr, | |
7a9f53b3 | 173 | u64 no_formal_ino, int skip_freeing) |
b3b94faa | 174 | { |
7a9f53b3 BM |
175 | struct inode *inode; |
176 | struct gfs2_inode *ip; | |
feaa7bba SW |
177 | struct gfs2_glock *io_gl; |
178 | int error; | |
b3b94faa | 179 | |
7a9f53b3 BM |
180 | if (skip_freeing) |
181 | inode = gfs2_iget_skip(sb, no_addr); | |
182 | else | |
183 | inode = gfs2_iget(sb, no_addr); | |
184 | ip = GFS2_I(inode); | |
185 | ||
26d83ded SW |
186 | if (!inode) |
187 | return ERR_PTR(-ENOBUFS); | |
188 | ||
feaa7bba SW |
189 | if (inode->i_state & I_NEW) { |
190 | struct gfs2_sbd *sdp = GFS2_SB(inode); | |
bb9bcf06 | 191 | ip->i_no_formal_ino = no_formal_ino; |
b3b94faa | 192 | |
dbb7cae2 | 193 | error = gfs2_glock_get(sdp, no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl); |
feaa7bba SW |
194 | if (unlikely(error)) |
195 | goto fail; | |
196 | ip->i_gl->gl_object = ip; | |
b3b94faa | 197 | |
dbb7cae2 | 198 | error = gfs2_glock_get(sdp, no_addr, &gfs2_iopen_glops, CREATE, &io_gl); |
feaa7bba SW |
199 | if (unlikely(error)) |
200 | goto fail_put; | |
b3b94faa | 201 | |
bfded27b | 202 | set_bit(GIF_INVALID, &ip->i_flags); |
feaa7bba SW |
203 | error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh); |
204 | if (unlikely(error)) | |
205 | goto fail_iopen; | |
d93cfa98 | 206 | ip->i_iopen_gh.gh_gl->gl_object = ip; |
b3b94faa | 207 | |
feaa7bba | 208 | gfs2_glock_put(io_gl); |
c8cdf479 | 209 | |
35dcc52e WC |
210 | if ((type == DT_UNKNOWN) && (no_formal_ino == 0)) |
211 | goto gfs2_nfsbypass; | |
212 | ||
213 | inode->i_mode = DT2IF(type); | |
214 | ||
c8cdf479 SW |
215 | /* |
216 | * We must read the inode in order to work out its type in | |
217 | * this case. Note that this doesn't happen often as we normally | |
218 | * know the type beforehand. This code path only occurs during | |
219 | * unlinked inode recovery (where it is safe to do this glock, | |
220 | * which is not true in the general case). | |
221 | */ | |
c8cdf479 SW |
222 | if (type == DT_UNKNOWN) { |
223 | struct gfs2_holder gh; | |
224 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); | |
225 | if (unlikely(error)) | |
226 | goto fail_glock; | |
227 | /* Inode is now uptodate */ | |
c8cdf479 SW |
228 | gfs2_glock_dq_uninit(&gh); |
229 | } | |
230 | ||
35dcc52e | 231 | gfs2_set_iop(inode); |
feaa7bba | 232 | } |
b3b94faa | 233 | |
35dcc52e | 234 | gfs2_nfsbypass: |
b3b94faa | 235 | return inode; |
c8cdf479 SW |
236 | fail_glock: |
237 | gfs2_glock_dq(&ip->i_iopen_gh); | |
feaa7bba SW |
238 | fail_iopen: |
239 | gfs2_glock_put(io_gl); | |
240 | fail_put: | |
241 | ip->i_gl->gl_object = NULL; | |
242 | gfs2_glock_put(ip->i_gl); | |
243 | fail: | |
69840b0d | 244 | iget_failed(inode); |
feaa7bba | 245 | return ERR_PTR(error); |
b3b94faa DT |
246 | } |
247 | ||
af339c02 | 248 | static int gfs2_dinode_in(struct gfs2_inode *ip, const void *buf) |
ea744d01 SW |
249 | { |
250 | struct gfs2_dinode_host *di = &ip->i_di; | |
251 | const struct gfs2_dinode *str = buf; | |
719ee344 | 252 | struct timespec atime; |
9a004508 | 253 | u16 height, depth; |
ea744d01 | 254 | |
ecc30c79 SW |
255 | if (unlikely(ip->i_no_addr != be64_to_cpu(str->di_num.no_addr))) |
256 | goto corrupt; | |
dbb7cae2 | 257 | ip->i_no_formal_ino = be64_to_cpu(str->di_num.no_formal_ino); |
b60623c2 | 258 | ip->i_inode.i_mode = be32_to_cpu(str->di_mode); |
e7f14f4d | 259 | ip->i_inode.i_rdev = 0; |
b60623c2 | 260 | switch (ip->i_inode.i_mode & S_IFMT) { |
e7f14f4d SW |
261 | case S_IFBLK: |
262 | case S_IFCHR: | |
263 | ip->i_inode.i_rdev = MKDEV(be32_to_cpu(str->di_major), | |
264 | be32_to_cpu(str->di_minor)); | |
265 | break; | |
266 | }; | |
267 | ||
2933f925 SW |
268 | ip->i_inode.i_uid = be32_to_cpu(str->di_uid); |
269 | ip->i_inode.i_gid = be32_to_cpu(str->di_gid); | |
4f56110a SW |
270 | /* |
271 | * We will need to review setting the nlink count here in the | |
272 | * light of the forthcoming ro bind mount work. This is a reminder | |
273 | * to do that. | |
274 | */ | |
275 | ip->i_inode.i_nlink = be32_to_cpu(str->di_nlink); | |
ea744d01 | 276 | di->di_size = be64_to_cpu(str->di_size); |
9e2dbdac | 277 | i_size_write(&ip->i_inode, di->di_size); |
77658aad | 278 | gfs2_set_inode_blocks(&ip->i_inode, be64_to_cpu(str->di_blocks)); |
719ee344 SW |
279 | atime.tv_sec = be64_to_cpu(str->di_atime); |
280 | atime.tv_nsec = be32_to_cpu(str->di_atime_nsec); | |
281 | if (timespec_compare(&ip->i_inode.i_atime, &atime) < 0) | |
282 | ip->i_inode.i_atime = atime; | |
1a7b1eed | 283 | ip->i_inode.i_mtime.tv_sec = be64_to_cpu(str->di_mtime); |
4bd91ba1 | 284 | ip->i_inode.i_mtime.tv_nsec = be32_to_cpu(str->di_mtime_nsec); |
1a7b1eed | 285 | ip->i_inode.i_ctime.tv_sec = be64_to_cpu(str->di_ctime); |
4bd91ba1 | 286 | ip->i_inode.i_ctime.tv_nsec = be32_to_cpu(str->di_ctime_nsec); |
ea744d01 | 287 | |
ce276b06 | 288 | ip->i_goal = be64_to_cpu(str->di_goal_meta); |
bcf0b5b3 | 289 | ip->i_generation = be64_to_cpu(str->di_generation); |
ea744d01 SW |
290 | |
291 | di->di_flags = be32_to_cpu(str->di_flags); | |
6b124d8d | 292 | gfs2_set_inode_flags(&ip->i_inode); |
ecc30c79 SW |
293 | height = be16_to_cpu(str->di_height); |
294 | if (unlikely(height > GFS2_MAX_META_HEIGHT)) | |
295 | goto corrupt; | |
296 | ip->i_height = (u8)height; | |
ea744d01 | 297 | |
9a004508 SW |
298 | depth = be16_to_cpu(str->di_depth); |
299 | if (unlikely(depth > GFS2_DIR_MAX_DEPTH)) | |
300 | goto corrupt; | |
301 | ip->i_depth = (u8)depth; | |
ea744d01 SW |
302 | di->di_entries = be32_to_cpu(str->di_entries); |
303 | ||
304 | di->di_eattr = be64_to_cpu(str->di_eattr); | |
5561093e SW |
305 | if (S_ISREG(ip->i_inode.i_mode)) |
306 | gfs2_set_aops(&ip->i_inode); | |
307 | ||
af339c02 | 308 | return 0; |
ecc30c79 SW |
309 | corrupt: |
310 | if (gfs2_consist_inode(ip)) | |
311 | gfs2_dinode_print(ip); | |
312 | return -EIO; | |
ea744d01 SW |
313 | } |
314 | ||
b3b94faa DT |
315 | /** |
316 | * gfs2_inode_refresh - Refresh the incore copy of the dinode | |
317 | * @ip: The GFS2 inode | |
318 | * | |
319 | * Returns: errno | |
320 | */ | |
321 | ||
322 | int gfs2_inode_refresh(struct gfs2_inode *ip) | |
323 | { | |
324 | struct buffer_head *dibh; | |
325 | int error; | |
326 | ||
327 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
328 | if (error) | |
329 | return error; | |
330 | ||
feaa7bba | 331 | if (gfs2_metatype_check(GFS2_SB(&ip->i_inode), dibh, GFS2_METATYPE_DI)) { |
b3b94faa DT |
332 | brelse(dibh); |
333 | return -EIO; | |
334 | } | |
335 | ||
af339c02 | 336 | error = gfs2_dinode_in(ip, dibh->b_data); |
b3b94faa | 337 | brelse(dibh); |
bfded27b | 338 | clear_bit(GIF_INVALID, &ip->i_flags); |
b3b94faa | 339 | |
af339c02 | 340 | return error; |
b3b94faa DT |
341 | } |
342 | ||
feaa7bba | 343 | int gfs2_dinode_dealloc(struct gfs2_inode *ip) |
b3b94faa | 344 | { |
feaa7bba | 345 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa DT |
346 | struct gfs2_alloc *al; |
347 | struct gfs2_rgrpd *rgd; | |
348 | int error; | |
349 | ||
77658aad | 350 | if (gfs2_get_inode_blocks(&ip->i_inode) != 1) { |
b3b94faa | 351 | if (gfs2_consist_inode(ip)) |
4cc14f0b | 352 | gfs2_dinode_print(ip); |
b3b94faa DT |
353 | return -EIO; |
354 | } | |
355 | ||
356 | al = gfs2_alloc_get(ip); | |
182fe5ab CG |
357 | if (!al) |
358 | return -ENOMEM; | |
b3b94faa DT |
359 | |
360 | error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE); | |
361 | if (error) | |
362 | goto out; | |
363 | ||
364 | error = gfs2_rindex_hold(sdp, &al->al_ri_gh); | |
365 | if (error) | |
366 | goto out_qs; | |
367 | ||
dbb7cae2 | 368 | rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr); |
b3b94faa DT |
369 | if (!rgd) { |
370 | gfs2_consist_inode(ip); | |
371 | error = -EIO; | |
372 | goto out_rindex_relse; | |
373 | } | |
374 | ||
375 | error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, | |
376 | &al->al_rgd_gh); | |
377 | if (error) | |
378 | goto out_rindex_relse; | |
379 | ||
420b9e5e | 380 | error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_STATFS + RES_QUOTA, 1); |
b3b94faa DT |
381 | if (error) |
382 | goto out_rg_gunlock; | |
383 | ||
2bcd610d SW |
384 | set_bit(GLF_DIRTY, &ip->i_gl->gl_flags); |
385 | set_bit(GLF_LFLUSH, &ip->i_gl->gl_flags); | |
b3b94faa DT |
386 | |
387 | gfs2_free_di(rgd, ip); | |
388 | ||
b3b94faa DT |
389 | gfs2_trans_end(sdp); |
390 | clear_bit(GLF_STICKY, &ip->i_gl->gl_flags); | |
391 | ||
feaa7bba | 392 | out_rg_gunlock: |
b3b94faa | 393 | gfs2_glock_dq_uninit(&al->al_rgd_gh); |
feaa7bba | 394 | out_rindex_relse: |
b3b94faa | 395 | gfs2_glock_dq_uninit(&al->al_ri_gh); |
feaa7bba | 396 | out_qs: |
b3b94faa | 397 | gfs2_quota_unhold(ip); |
36327521 | 398 | out: |
feaa7bba | 399 | gfs2_alloc_put(ip); |
b3b94faa DT |
400 | return error; |
401 | } | |
402 | ||
b3b94faa | 403 | /** |
87d21e07 | 404 | * gfs2_change_nlink - Change nlink count on inode |
b3b94faa DT |
405 | * @ip: The GFS2 inode |
406 | * @diff: The change in the nlink count required | |
407 | * | |
408 | * Returns: errno | |
409 | */ | |
87d21e07 | 410 | int gfs2_change_nlink(struct gfs2_inode *ip, int diff) |
b3b94faa DT |
411 | { |
412 | struct buffer_head *dibh; | |
cd915493 | 413 | u32 nlink; |
b3b94faa DT |
414 | int error; |
415 | ||
4f56110a SW |
416 | BUG_ON(diff != 1 && diff != -1); |
417 | nlink = ip->i_inode.i_nlink + diff; | |
b3b94faa DT |
418 | |
419 | /* If we are reducing the nlink count, but the new value ends up being | |
420 | bigger than the old one, we must have underflowed. */ | |
4f56110a | 421 | if (diff < 0 && nlink > ip->i_inode.i_nlink) { |
b3b94faa | 422 | if (gfs2_consist_inode(ip)) |
4cc14f0b | 423 | gfs2_dinode_print(ip); |
b3b94faa DT |
424 | return -EIO; |
425 | } | |
426 | ||
427 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
428 | if (error) | |
429 | return error; | |
430 | ||
4f56110a SW |
431 | if (diff > 0) |
432 | inc_nlink(&ip->i_inode); | |
433 | else | |
434 | drop_nlink(&ip->i_inode); | |
435 | ||
4bd91ba1 | 436 | ip->i_inode.i_ctime = CURRENT_TIME; |
b3b94faa | 437 | |
d4e9c4c3 | 438 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
539e5d6b | 439 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa | 440 | brelse(dibh); |
feaa7bba | 441 | mark_inode_dirty(&ip->i_inode); |
b3b94faa | 442 | |
87d21e07 | 443 | if (ip->i_inode.i_nlink == 0) |
ddee7608 | 444 | gfs2_unlink_di(&ip->i_inode); /* mark inode unlinked */ |
87d21e07 | 445 | |
5509826f WC |
446 | return error; |
447 | } | |
448 | ||
c752666c SW |
449 | struct inode *gfs2_lookup_simple(struct inode *dip, const char *name) |
450 | { | |
451 | struct qstr qstr; | |
6c93fd1e | 452 | struct inode *inode; |
71b86f56 | 453 | gfs2_str2qstr(&qstr, name); |
a569c711 | 454 | inode = gfs2_lookupi(dip, &qstr, 1); |
6c93fd1e RC |
455 | /* gfs2_lookupi has inconsistent callers: vfs |
456 | * related routines expect NULL for no entry found, | |
457 | * gfs2_lookup_simple callers expect ENOENT | |
458 | * and do not check for NULL. | |
459 | */ | |
460 | if (inode == NULL) | |
461 | return ERR_PTR(-ENOENT); | |
462 | else | |
463 | return inode; | |
c752666c SW |
464 | } |
465 | ||
466 | ||
b3b94faa DT |
467 | /** |
468 | * gfs2_lookupi - Look up a filename in a directory and return its inode | |
469 | * @d_gh: An initialized holder for the directory glock | |
470 | * @name: The name of the inode to look for | |
471 | * @is_root: If 1, ignore the caller's permissions | |
472 | * @i_gh: An uninitialized holder for the new inode glock | |
473 | * | |
d7c103d0 SW |
474 | * This can be called via the VFS filldir function when NFS is doing |
475 | * a readdirplus and the inode which its intending to stat isn't | |
476 | * already in cache. In this case we must not take the directory glock | |
477 | * again, since the readdir call will have already taken that lock. | |
b3b94faa DT |
478 | * |
479 | * Returns: errno | |
480 | */ | |
481 | ||
feaa7bba | 482 | struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name, |
a569c711 | 483 | int is_root) |
b3b94faa | 484 | { |
c9fd4307 | 485 | struct super_block *sb = dir->i_sb; |
feaa7bba | 486 | struct gfs2_inode *dip = GFS2_I(dir); |
b3b94faa | 487 | struct gfs2_holder d_gh; |
037bcbb7 | 488 | int error = 0; |
c752666c | 489 | struct inode *inode = NULL; |
d7c103d0 | 490 | int unlock = 0; |
b3b94faa DT |
491 | |
492 | if (!name->len || name->len > GFS2_FNAMESIZE) | |
c752666c | 493 | return ERR_PTR(-ENAMETOOLONG); |
b3b94faa | 494 | |
c752666c SW |
495 | if ((name->len == 1 && memcmp(name->name, ".", 1) == 0) || |
496 | (name->len == 2 && memcmp(name->name, "..", 2) == 0 && | |
497 | dir == sb->s_root->d_inode)) { | |
320dd101 SW |
498 | igrab(dir); |
499 | return dir; | |
b3b94faa DT |
500 | } |
501 | ||
7afd88d9 | 502 | if (gfs2_glock_is_locked_by_me(dip->i_gl) == NULL) { |
d7c103d0 SW |
503 | error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh); |
504 | if (error) | |
505 | return ERR_PTR(error); | |
506 | unlock = 1; | |
507 | } | |
b3b94faa DT |
508 | |
509 | if (!is_root) { | |
f58ba889 | 510 | error = gfs2_permission(dir, MAY_EXEC); |
b3b94faa DT |
511 | if (error) |
512 | goto out; | |
513 | } | |
514 | ||
dbb7cae2 SW |
515 | inode = gfs2_dir_search(dir, name); |
516 | if (IS_ERR(inode)) | |
517 | error = PTR_ERR(inode); | |
7359a19c | 518 | out: |
d7c103d0 SW |
519 | if (unlock) |
520 | gfs2_glock_dq_uninit(&d_gh); | |
c752666c SW |
521 | if (error == -ENOENT) |
522 | return NULL; | |
d7c103d0 | 523 | return inode ? inode : ERR_PTR(error); |
b3b94faa DT |
524 | } |
525 | ||
bb8d8a6f SW |
526 | static void gfs2_inum_range_in(struct gfs2_inum_range_host *ir, const void *buf) |
527 | { | |
528 | const struct gfs2_inum_range *str = buf; | |
529 | ||
530 | ir->ir_start = be64_to_cpu(str->ir_start); | |
531 | ir->ir_length = be64_to_cpu(str->ir_length); | |
532 | } | |
533 | ||
534 | static void gfs2_inum_range_out(const struct gfs2_inum_range_host *ir, void *buf) | |
535 | { | |
536 | struct gfs2_inum_range *str = buf; | |
537 | ||
538 | str->ir_start = cpu_to_be64(ir->ir_start); | |
539 | str->ir_length = cpu_to_be64(ir->ir_length); | |
540 | } | |
541 | ||
cd915493 | 542 | static int pick_formal_ino_1(struct gfs2_sbd *sdp, u64 *formal_ino) |
b3b94faa | 543 | { |
feaa7bba | 544 | struct gfs2_inode *ip = GFS2_I(sdp->sd_ir_inode); |
b3b94faa | 545 | struct buffer_head *bh; |
e6972647 | 546 | struct gfs2_inum_range_host ir; |
b3b94faa DT |
547 | int error; |
548 | ||
549 | error = gfs2_trans_begin(sdp, RES_DINODE, 0); | |
550 | if (error) | |
551 | return error; | |
f55ab26a | 552 | mutex_lock(&sdp->sd_inum_mutex); |
b3b94faa DT |
553 | |
554 | error = gfs2_meta_inode_buffer(ip, &bh); | |
555 | if (error) { | |
f55ab26a | 556 | mutex_unlock(&sdp->sd_inum_mutex); |
b3b94faa DT |
557 | gfs2_trans_end(sdp); |
558 | return error; | |
559 | } | |
560 | ||
561 | gfs2_inum_range_in(&ir, bh->b_data + sizeof(struct gfs2_dinode)); | |
562 | ||
563 | if (ir.ir_length) { | |
564 | *formal_ino = ir.ir_start++; | |
565 | ir.ir_length--; | |
d4e9c4c3 | 566 | gfs2_trans_add_bh(ip->i_gl, bh, 1); |
b3b94faa DT |
567 | gfs2_inum_range_out(&ir, |
568 | bh->b_data + sizeof(struct gfs2_dinode)); | |
569 | brelse(bh); | |
f55ab26a | 570 | mutex_unlock(&sdp->sd_inum_mutex); |
b3b94faa DT |
571 | gfs2_trans_end(sdp); |
572 | return 0; | |
573 | } | |
574 | ||
575 | brelse(bh); | |
576 | ||
f55ab26a | 577 | mutex_unlock(&sdp->sd_inum_mutex); |
b3b94faa DT |
578 | gfs2_trans_end(sdp); |
579 | ||
580 | return 1; | |
581 | } | |
582 | ||
cd915493 | 583 | static int pick_formal_ino_2(struct gfs2_sbd *sdp, u64 *formal_ino) |
b3b94faa | 584 | { |
feaa7bba SW |
585 | struct gfs2_inode *ip = GFS2_I(sdp->sd_ir_inode); |
586 | struct gfs2_inode *m_ip = GFS2_I(sdp->sd_inum_inode); | |
b3b94faa DT |
587 | struct gfs2_holder gh; |
588 | struct buffer_head *bh; | |
e6972647 | 589 | struct gfs2_inum_range_host ir; |
b3b94faa DT |
590 | int error; |
591 | ||
592 | error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); | |
593 | if (error) | |
594 | return error; | |
595 | ||
596 | error = gfs2_trans_begin(sdp, 2 * RES_DINODE, 0); | |
597 | if (error) | |
598 | goto out; | |
f55ab26a | 599 | mutex_lock(&sdp->sd_inum_mutex); |
b3b94faa DT |
600 | |
601 | error = gfs2_meta_inode_buffer(ip, &bh); | |
602 | if (error) | |
603 | goto out_end_trans; | |
907b9bce | 604 | |
b3b94faa DT |
605 | gfs2_inum_range_in(&ir, bh->b_data + sizeof(struct gfs2_dinode)); |
606 | ||
607 | if (!ir.ir_length) { | |
608 | struct buffer_head *m_bh; | |
cd915493 | 609 | u64 x, y; |
b44b84d7 | 610 | __be64 z; |
b3b94faa DT |
611 | |
612 | error = gfs2_meta_inode_buffer(m_ip, &m_bh); | |
613 | if (error) | |
614 | goto out_brelse; | |
615 | ||
b44b84d7 AV |
616 | z = *(__be64 *)(m_bh->b_data + sizeof(struct gfs2_dinode)); |
617 | x = y = be64_to_cpu(z); | |
b3b94faa DT |
618 | ir.ir_start = x; |
619 | ir.ir_length = GFS2_INUM_QUANTUM; | |
620 | x += GFS2_INUM_QUANTUM; | |
621 | if (x < y) | |
622 | gfs2_consist_inode(m_ip); | |
b44b84d7 | 623 | z = cpu_to_be64(x); |
d4e9c4c3 | 624 | gfs2_trans_add_bh(m_ip->i_gl, m_bh, 1); |
b44b84d7 | 625 | *(__be64 *)(m_bh->b_data + sizeof(struct gfs2_dinode)) = z; |
b3b94faa DT |
626 | |
627 | brelse(m_bh); | |
628 | } | |
629 | ||
630 | *formal_ino = ir.ir_start++; | |
631 | ir.ir_length--; | |
632 | ||
d4e9c4c3 | 633 | gfs2_trans_add_bh(ip->i_gl, bh, 1); |
b3b94faa DT |
634 | gfs2_inum_range_out(&ir, bh->b_data + sizeof(struct gfs2_dinode)); |
635 | ||
420b9e5e | 636 | out_brelse: |
b3b94faa | 637 | brelse(bh); |
420b9e5e | 638 | out_end_trans: |
f55ab26a | 639 | mutex_unlock(&sdp->sd_inum_mutex); |
b3b94faa | 640 | gfs2_trans_end(sdp); |
420b9e5e | 641 | out: |
b3b94faa | 642 | gfs2_glock_dq_uninit(&gh); |
b3b94faa DT |
643 | return error; |
644 | } | |
645 | ||
cd915493 | 646 | static int pick_formal_ino(struct gfs2_sbd *sdp, u64 *inum) |
b3b94faa DT |
647 | { |
648 | int error; | |
649 | ||
650 | error = pick_formal_ino_1(sdp, inum); | |
651 | if (error <= 0) | |
652 | return error; | |
653 | ||
654 | error = pick_formal_ino_2(sdp, inum); | |
655 | ||
656 | return error; | |
657 | } | |
658 | ||
659 | /** | |
660 | * create_ok - OK to create a new on-disk inode here? | |
661 | * @dip: Directory in which dinode is to be created | |
662 | * @name: Name of new dinode | |
663 | * @mode: | |
664 | * | |
665 | * Returns: errno | |
666 | */ | |
667 | ||
feaa7bba | 668 | static int create_ok(struct gfs2_inode *dip, const struct qstr *name, |
b3b94faa DT |
669 | unsigned int mode) |
670 | { | |
671 | int error; | |
672 | ||
f58ba889 | 673 | error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC); |
b3b94faa DT |
674 | if (error) |
675 | return error; | |
676 | ||
677 | /* Don't create entries in an unlinked directory */ | |
4f56110a | 678 | if (!dip->i_inode.i_nlink) |
b3b94faa DT |
679 | return -EPERM; |
680 | ||
dbb7cae2 | 681 | error = gfs2_dir_check(&dip->i_inode, name, NULL); |
b3b94faa DT |
682 | switch (error) { |
683 | case -ENOENT: | |
684 | error = 0; | |
685 | break; | |
686 | case 0: | |
687 | return -EEXIST; | |
688 | default: | |
689 | return error; | |
690 | } | |
691 | ||
cd915493 | 692 | if (dip->i_di.di_entries == (u32)-1) |
b3b94faa | 693 | return -EFBIG; |
4f56110a | 694 | if (S_ISDIR(mode) && dip->i_inode.i_nlink == (u32)-1) |
b3b94faa DT |
695 | return -EMLINK; |
696 | ||
697 | return 0; | |
698 | } | |
699 | ||
700 | static void munge_mode_uid_gid(struct gfs2_inode *dip, unsigned int *mode, | |
701 | unsigned int *uid, unsigned int *gid) | |
702 | { | |
feaa7bba | 703 | if (GFS2_SB(&dip->i_inode)->sd_args.ar_suiddir && |
2933f925 | 704 | (dip->i_inode.i_mode & S_ISUID) && dip->i_inode.i_uid) { |
b3b94faa DT |
705 | if (S_ISDIR(*mode)) |
706 | *mode |= S_ISUID; | |
3de7be33 | 707 | else if (dip->i_inode.i_uid != current_fsuid()) |
b3b94faa | 708 | *mode &= ~07111; |
2933f925 | 709 | *uid = dip->i_inode.i_uid; |
b3b94faa | 710 | } else |
3de7be33 | 711 | *uid = current_fsuid(); |
b3b94faa | 712 | |
b60623c2 | 713 | if (dip->i_inode.i_mode & S_ISGID) { |
b3b94faa DT |
714 | if (S_ISDIR(*mode)) |
715 | *mode |= S_ISGID; | |
2933f925 | 716 | *gid = dip->i_inode.i_gid; |
b3b94faa | 717 | } else |
3de7be33 | 718 | *gid = current_fsgid(); |
b3b94faa DT |
719 | } |
720 | ||
dbb7cae2 | 721 | static int alloc_dinode(struct gfs2_inode *dip, u64 *no_addr, u64 *generation) |
b3b94faa | 722 | { |
feaa7bba | 723 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); |
b3b94faa DT |
724 | int error; |
725 | ||
6dbd8224 SW |
726 | if (gfs2_alloc_get(dip) == NULL) |
727 | return -ENOMEM; | |
b3b94faa | 728 | |
6dbd8224 | 729 | dip->i_alloc->al_requested = RES_DINODE; |
b3b94faa DT |
730 | error = gfs2_inplace_reserve(dip); |
731 | if (error) | |
732 | goto out; | |
733 | ||
feaa7bba | 734 | error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_STATFS, 0); |
b3b94faa DT |
735 | if (error) |
736 | goto out_ipreserv; | |
737 | ||
dbb7cae2 | 738 | *no_addr = gfs2_alloc_di(dip, generation); |
b3b94faa DT |
739 | |
740 | gfs2_trans_end(sdp); | |
741 | ||
4340fe62 | 742 | out_ipreserv: |
b3b94faa | 743 | gfs2_inplace_release(dip); |
4340fe62 | 744 | out: |
b3b94faa | 745 | gfs2_alloc_put(dip); |
b3b94faa DT |
746 | return error; |
747 | } | |
748 | ||
749 | /** | |
750 | * init_dinode - Fill in a new dinode structure | |
751 | * @dip: the directory this inode is being created in | |
752 | * @gl: The glock covering the new inode | |
753 | * @inum: the inode number | |
754 | * @mode: the file permissions | |
755 | * @uid: | |
756 | * @gid: | |
757 | * | |
758 | */ | |
759 | ||
760 | static void init_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl, | |
629a21e7 | 761 | const struct gfs2_inum_host *inum, unsigned int mode, |
4340fe62 | 762 | unsigned int uid, unsigned int gid, |
e9bd2b3b | 763 | const u64 *generation, dev_t dev, struct buffer_head **bhp) |
b3b94faa | 764 | { |
feaa7bba | 765 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); |
b96ca4fa | 766 | struct gfs2_dinode *di; |
b3b94faa | 767 | struct buffer_head *dibh; |
4bd91ba1 | 768 | struct timespec tv = CURRENT_TIME; |
b3b94faa DT |
769 | |
770 | dibh = gfs2_meta_new(gl, inum->no_addr); | |
d4e9c4c3 | 771 | gfs2_trans_add_bh(gl, dibh, 1); |
b3b94faa DT |
772 | gfs2_metatype_set(dibh, GFS2_METATYPE_DI, GFS2_FORMAT_DI); |
773 | gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode)); | |
b96ca4fa SW |
774 | di = (struct gfs2_dinode *)dibh->b_data; |
775 | ||
2442a098 SW |
776 | di->di_num.no_formal_ino = cpu_to_be64(inum->no_formal_ino); |
777 | di->di_num.no_addr = cpu_to_be64(inum->no_addr); | |
b96ca4fa SW |
778 | di->di_mode = cpu_to_be32(mode); |
779 | di->di_uid = cpu_to_be32(uid); | |
780 | di->di_gid = cpu_to_be32(gid); | |
294caaa3 SW |
781 | di->di_nlink = 0; |
782 | di->di_size = 0; | |
b96ca4fa | 783 | di->di_blocks = cpu_to_be64(1); |
4bd91ba1 | 784 | di->di_atime = di->di_mtime = di->di_ctime = cpu_to_be64(tv.tv_sec); |
e7f14f4d SW |
785 | di->di_major = cpu_to_be32(MAJOR(dev)); |
786 | di->di_minor = cpu_to_be32(MINOR(dev)); | |
b96ca4fa | 787 | di->di_goal_meta = di->di_goal_data = cpu_to_be64(inum->no_addr); |
4340fe62 | 788 | di->di_generation = cpu_to_be64(*generation); |
294caaa3 | 789 | di->di_flags = 0; |
b3b94faa DT |
790 | |
791 | if (S_ISREG(mode)) { | |
792 | if ((dip->i_di.di_flags & GFS2_DIF_INHERIT_JDATA) || | |
793 | gfs2_tune_get(sdp, gt_new_files_jdata)) | |
b96ca4fa | 794 | di->di_flags |= cpu_to_be32(GFS2_DIF_JDATA); |
b3b94faa | 795 | } else if (S_ISDIR(mode)) { |
568f4c96 SW |
796 | di->di_flags |= cpu_to_be32(dip->i_di.di_flags & |
797 | GFS2_DIF_INHERIT_JDATA); | |
b3b94faa DT |
798 | } |
799 | ||
b96ca4fa | 800 | di->__pad1 = 0; |
a9583c79 | 801 | di->di_payload_format = cpu_to_be32(S_ISDIR(mode) ? GFS2_FORMAT_DE : 0); |
294caaa3 | 802 | di->di_height = 0; |
b96ca4fa SW |
803 | di->__pad2 = 0; |
804 | di->__pad3 = 0; | |
294caaa3 SW |
805 | di->di_depth = 0; |
806 | di->di_entries = 0; | |
b96ca4fa | 807 | memset(&di->__pad4, 0, sizeof(di->__pad4)); |
294caaa3 | 808 | di->di_eattr = 0; |
4bd91ba1 SW |
809 | di->di_atime_nsec = cpu_to_be32(tv.tv_nsec); |
810 | di->di_mtime_nsec = cpu_to_be32(tv.tv_nsec); | |
811 | di->di_ctime_nsec = cpu_to_be32(tv.tv_nsec); | |
b96ca4fa | 812 | memset(&di->di_reserved, 0, sizeof(di->di_reserved)); |
e9bd2b3b WC |
813 | |
814 | set_buffer_uptodate(dibh); | |
b96ca4fa | 815 | |
e9bd2b3b | 816 | *bhp = dibh; |
b3b94faa DT |
817 | } |
818 | ||
819 | static int make_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl, | |
629a21e7 | 820 | unsigned int mode, const struct gfs2_inum_host *inum, |
e9bd2b3b | 821 | const u64 *generation, dev_t dev, struct buffer_head **bhp) |
b3b94faa | 822 | { |
feaa7bba | 823 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); |
b3b94faa DT |
824 | unsigned int uid, gid; |
825 | int error; | |
826 | ||
827 | munge_mode_uid_gid(dip, &mode, &uid, &gid); | |
182fe5ab CG |
828 | if (!gfs2_alloc_get(dip)) |
829 | return -ENOMEM; | |
b3b94faa DT |
830 | |
831 | error = gfs2_quota_lock(dip, uid, gid); | |
832 | if (error) | |
833 | goto out; | |
834 | ||
835 | error = gfs2_quota_check(dip, uid, gid); | |
836 | if (error) | |
837 | goto out_quota; | |
838 | ||
feaa7bba | 839 | error = gfs2_trans_begin(sdp, RES_DINODE + RES_QUOTA, 0); |
b3b94faa DT |
840 | if (error) |
841 | goto out_quota; | |
842 | ||
e9bd2b3b | 843 | init_dinode(dip, gl, inum, mode, uid, gid, generation, dev, bhp); |
b3b94faa | 844 | gfs2_quota_change(dip, +1, uid, gid); |
b3b94faa DT |
845 | gfs2_trans_end(sdp); |
846 | ||
feaa7bba | 847 | out_quota: |
b3b94faa | 848 | gfs2_quota_unlock(dip); |
feaa7bba | 849 | out: |
b3b94faa | 850 | gfs2_alloc_put(dip); |
b3b94faa DT |
851 | return error; |
852 | } | |
853 | ||
feaa7bba SW |
854 | static int link_dinode(struct gfs2_inode *dip, const struct qstr *name, |
855 | struct gfs2_inode *ip) | |
b3b94faa | 856 | { |
feaa7bba | 857 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); |
b3b94faa DT |
858 | struct gfs2_alloc *al; |
859 | int alloc_required; | |
860 | struct buffer_head *dibh; | |
861 | int error; | |
862 | ||
863 | al = gfs2_alloc_get(dip); | |
182fe5ab CG |
864 | if (!al) |
865 | return -ENOMEM; | |
b3b94faa DT |
866 | |
867 | error = gfs2_quota_lock(dip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE); | |
868 | if (error) | |
869 | goto fail; | |
870 | ||
feaa7bba | 871 | error = alloc_required = gfs2_diradd_alloc_required(&dip->i_inode, name); |
c752666c | 872 | if (alloc_required < 0) |
1b8177ec | 873 | goto fail_quota_locks; |
b3b94faa | 874 | if (alloc_required) { |
2933f925 | 875 | error = gfs2_quota_check(dip, dip->i_inode.i_uid, dip->i_inode.i_gid); |
b3b94faa DT |
876 | if (error) |
877 | goto fail_quota_locks; | |
878 | ||
879 | al->al_requested = sdp->sd_max_dirres; | |
880 | ||
881 | error = gfs2_inplace_reserve(dip); | |
882 | if (error) | |
883 | goto fail_quota_locks; | |
884 | ||
320dd101 | 885 | error = gfs2_trans_begin(sdp, sdp->sd_max_dirres + |
bb8d8a6f | 886 | al->al_rgd->rd_length + |
907b9bce | 887 | 2 * RES_DINODE + |
b3b94faa DT |
888 | RES_STATFS + RES_QUOTA, 0); |
889 | if (error) | |
890 | goto fail_ipreserv; | |
891 | } else { | |
feaa7bba | 892 | error = gfs2_trans_begin(sdp, RES_LEAF + 2 * RES_DINODE, 0); |
b3b94faa DT |
893 | if (error) |
894 | goto fail_quota_locks; | |
895 | } | |
896 | ||
dbb7cae2 | 897 | error = gfs2_dir_add(&dip->i_inode, name, ip, IF2DT(ip->i_inode.i_mode)); |
b3b94faa DT |
898 | if (error) |
899 | goto fail_end_trans; | |
900 | ||
901 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
902 | if (error) | |
903 | goto fail_end_trans; | |
4f56110a | 904 | ip->i_inode.i_nlink = 1; |
d4e9c4c3 | 905 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
539e5d6b | 906 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa | 907 | brelse(dibh); |
b3b94faa DT |
908 | return 0; |
909 | ||
320dd101 | 910 | fail_end_trans: |
b3b94faa DT |
911 | gfs2_trans_end(sdp); |
912 | ||
320dd101 | 913 | fail_ipreserv: |
6dbd8224 | 914 | if (dip->i_alloc->al_rgd) |
b3b94faa DT |
915 | gfs2_inplace_release(dip); |
916 | ||
320dd101 | 917 | fail_quota_locks: |
b3b94faa DT |
918 | gfs2_quota_unlock(dip); |
919 | ||
320dd101 | 920 | fail: |
b3b94faa | 921 | gfs2_alloc_put(dip); |
b3b94faa DT |
922 | return error; |
923 | } | |
924 | ||
fcb47e0b RH |
925 | static int gfs2_security_init(struct gfs2_inode *dip, struct gfs2_inode *ip) |
926 | { | |
927 | int err; | |
928 | size_t len; | |
929 | void *value; | |
930 | char *name; | |
931 | struct gfs2_ea_request er; | |
932 | ||
933 | err = security_inode_init_security(&ip->i_inode, &dip->i_inode, | |
934 | &name, &value, &len); | |
935 | ||
936 | if (err) { | |
937 | if (err == -EOPNOTSUPP) | |
938 | return 0; | |
939 | return err; | |
940 | } | |
941 | ||
942 | memset(&er, 0, sizeof(struct gfs2_ea_request)); | |
943 | ||
944 | er.er_type = GFS2_EATYPE_SECURITY; | |
945 | er.er_name = name; | |
946 | er.er_data = value; | |
947 | er.er_name_len = strlen(name); | |
948 | er.er_data_len = len; | |
949 | ||
950 | err = gfs2_ea_set_i(ip, &er); | |
951 | ||
952 | kfree(value); | |
953 | kfree(name); | |
954 | ||
955 | return err; | |
956 | } | |
957 | ||
b3b94faa DT |
958 | /** |
959 | * gfs2_createi - Create a new inode | |
960 | * @ghs: An array of two holders | |
961 | * @name: The name of the new file | |
962 | * @mode: the permissions on the new inode | |
963 | * | |
964 | * @ghs[0] is an initialized holder for the directory | |
965 | * @ghs[1] is the holder for the inode lock | |
966 | * | |
7359a19c | 967 | * If the return value is not NULL, the glocks on both the directory and the new |
b3b94faa DT |
968 | * file are held. A transaction has been started and an inplace reservation |
969 | * is held, as well. | |
970 | * | |
7359a19c | 971 | * Returns: An inode |
b3b94faa DT |
972 | */ |
973 | ||
feaa7bba | 974 | struct inode *gfs2_createi(struct gfs2_holder *ghs, const struct qstr *name, |
e7f14f4d | 975 | unsigned int mode, dev_t dev) |
b3b94faa | 976 | { |
e1cc8603 | 977 | struct inode *inode = NULL; |
5c676f6d | 978 | struct gfs2_inode *dip = ghs->gh_gl->gl_object; |
feaa7bba SW |
979 | struct inode *dir = &dip->i_inode; |
980 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); | |
dbb7cae2 | 981 | struct gfs2_inum_host inum = { .no_addr = 0, .no_formal_ino = 0 }; |
b3b94faa | 982 | int error; |
4340fe62 | 983 | u64 generation; |
f91a0d3e | 984 | struct buffer_head *bh = NULL; |
b3b94faa DT |
985 | |
986 | if (!name->len || name->len > GFS2_FNAMESIZE) | |
7359a19c | 987 | return ERR_PTR(-ENAMETOOLONG); |
b3b94faa | 988 | |
b3b94faa DT |
989 | gfs2_holder_reinit(LM_ST_EXCLUSIVE, 0, ghs); |
990 | error = gfs2_glock_nq(ghs); | |
991 | if (error) | |
992 | goto fail; | |
993 | ||
994 | error = create_ok(dip, name, mode); | |
995 | if (error) | |
996 | goto fail_gunlock; | |
997 | ||
feaa7bba | 998 | error = pick_formal_ino(sdp, &inum.no_formal_ino); |
b3b94faa DT |
999 | if (error) |
1000 | goto fail_gunlock; | |
1001 | ||
dbb7cae2 | 1002 | error = alloc_dinode(dip, &inum.no_addr, &generation); |
b3b94faa DT |
1003 | if (error) |
1004 | goto fail_gunlock; | |
1005 | ||
28626e20 SW |
1006 | error = gfs2_glock_nq_num(sdp, inum.no_addr, &gfs2_inode_glops, |
1007 | LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1); | |
1008 | if (error) | |
1009 | goto fail_gunlock; | |
b3b94faa | 1010 | |
e9bd2b3b | 1011 | error = make_dinode(dip, ghs[1].gh_gl, mode, &inum, &generation, dev, &bh); |
b3b94faa DT |
1012 | if (error) |
1013 | goto fail_gunlock2; | |
1014 | ||
bb9bcf06 WC |
1015 | inode = gfs2_inode_lookup(dir->i_sb, IF2DT(mode), |
1016 | inum.no_addr, | |
7a9f53b3 | 1017 | inum.no_formal_ino, 0); |
feaa7bba | 1018 | if (IS_ERR(inode)) |
b3b94faa DT |
1019 | goto fail_gunlock2; |
1020 | ||
feaa7bba | 1021 | error = gfs2_inode_refresh(GFS2_I(inode)); |
b3b94faa | 1022 | if (error) |
e1cc8603 | 1023 | goto fail_gunlock2; |
b3b94faa | 1024 | |
feaa7bba | 1025 | error = gfs2_acl_create(dip, GFS2_I(inode)); |
b3b94faa | 1026 | if (error) |
e1cc8603 | 1027 | goto fail_gunlock2; |
b3b94faa | 1028 | |
fcb47e0b RH |
1029 | error = gfs2_security_init(dip, GFS2_I(inode)); |
1030 | if (error) | |
e1cc8603 | 1031 | goto fail_gunlock2; |
fcb47e0b | 1032 | |
feaa7bba | 1033 | error = link_dinode(dip, name, GFS2_I(inode)); |
b3b94faa | 1034 | if (error) |
e1cc8603 | 1035 | goto fail_gunlock2; |
b3b94faa | 1036 | |
f91a0d3e SW |
1037 | if (bh) |
1038 | brelse(bh); | |
7359a19c | 1039 | return inode; |
b3b94faa | 1040 | |
320dd101 | 1041 | fail_gunlock2: |
b3b94faa | 1042 | gfs2_glock_dq_uninit(ghs + 1); |
bd1eb881 | 1043 | if (inode && !IS_ERR(inode)) |
e1cc8603 | 1044 | iput(inode); |
320dd101 | 1045 | fail_gunlock: |
b3b94faa | 1046 | gfs2_glock_dq(ghs); |
320dd101 | 1047 | fail: |
f91a0d3e SW |
1048 | if (bh) |
1049 | brelse(bh); | |
7359a19c | 1050 | return ERR_PTR(error); |
b3b94faa DT |
1051 | } |
1052 | ||
b3b94faa DT |
1053 | /** |
1054 | * gfs2_rmdiri - Remove a directory | |
1055 | * @dip: The parent directory of the directory to be removed | |
1056 | * @name: The name of the directory to be removed | |
1057 | * @ip: The GFS2 inode of the directory to be removed | |
1058 | * | |
1059 | * Assumes Glocks on dip and ip are held | |
1060 | * | |
1061 | * Returns: errno | |
1062 | */ | |
1063 | ||
feaa7bba SW |
1064 | int gfs2_rmdiri(struct gfs2_inode *dip, const struct qstr *name, |
1065 | struct gfs2_inode *ip) | |
b3b94faa | 1066 | { |
b3b94faa DT |
1067 | struct qstr dotname; |
1068 | int error; | |
1069 | ||
1070 | if (ip->i_di.di_entries != 2) { | |
1071 | if (gfs2_consist_inode(ip)) | |
4cc14f0b | 1072 | gfs2_dinode_print(ip); |
b3b94faa DT |
1073 | return -EIO; |
1074 | } | |
1075 | ||
1076 | error = gfs2_dir_del(dip, name); | |
1077 | if (error) | |
1078 | return error; | |
1079 | ||
1080 | error = gfs2_change_nlink(dip, -1); | |
1081 | if (error) | |
1082 | return error; | |
1083 | ||
71b86f56 | 1084 | gfs2_str2qstr(&dotname, "."); |
b3b94faa DT |
1085 | error = gfs2_dir_del(ip, &dotname); |
1086 | if (error) | |
1087 | return error; | |
1088 | ||
feaa7bba | 1089 | gfs2_str2qstr(&dotname, ".."); |
b3b94faa DT |
1090 | error = gfs2_dir_del(ip, &dotname); |
1091 | if (error) | |
1092 | return error; | |
1093 | ||
4f56110a SW |
1094 | /* It looks odd, but it really should be done twice */ |
1095 | error = gfs2_change_nlink(ip, -1); | |
1096 | if (error) | |
1097 | return error; | |
1098 | ||
1099 | error = gfs2_change_nlink(ip, -1); | |
b3b94faa DT |
1100 | if (error) |
1101 | return error; | |
1102 | ||
b3b94faa DT |
1103 | return error; |
1104 | } | |
1105 | ||
1106 | /* | |
1107 | * gfs2_unlink_ok - check to see that a inode is still in a directory | |
1108 | * @dip: the directory | |
1109 | * @name: the name of the file | |
1110 | * @ip: the inode | |
1111 | * | |
1112 | * Assumes that the lock on (at least) @dip is held. | |
1113 | * | |
1114 | * Returns: 0 if the parent/child relationship is correct, errno if it isn't | |
1115 | */ | |
1116 | ||
feaa7bba | 1117 | int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name, |
dbb7cae2 | 1118 | const struct gfs2_inode *ip) |
b3b94faa | 1119 | { |
b3b94faa DT |
1120 | int error; |
1121 | ||
feaa7bba | 1122 | if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode)) |
b3b94faa DT |
1123 | return -EPERM; |
1124 | ||
b60623c2 | 1125 | if ((dip->i_inode.i_mode & S_ISVTX) && |
3de7be33 DH |
1126 | dip->i_inode.i_uid != current_fsuid() && |
1127 | ip->i_inode.i_uid != current_fsuid() && !capable(CAP_FOWNER)) | |
b3b94faa DT |
1128 | return -EPERM; |
1129 | ||
feaa7bba | 1130 | if (IS_APPEND(&dip->i_inode)) |
b3b94faa DT |
1131 | return -EPERM; |
1132 | ||
f58ba889 | 1133 | error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC); |
b3b94faa DT |
1134 | if (error) |
1135 | return error; | |
1136 | ||
dbb7cae2 | 1137 | error = gfs2_dir_check(&dip->i_inode, name, ip); |
b3b94faa DT |
1138 | if (error) |
1139 | return error; | |
1140 | ||
b3b94faa DT |
1141 | return 0; |
1142 | } | |
1143 | ||
b3b94faa DT |
1144 | /** |
1145 | * gfs2_readlinki - return the contents of a symlink | |
1146 | * @ip: the symlink's inode | |
1147 | * @buf: a pointer to the buffer to be filled | |
1148 | * @len: a pointer to the length of @buf | |
1149 | * | |
1150 | * If @buf is too small, a piece of memory is kmalloc()ed and needs | |
1151 | * to be freed by the caller. | |
1152 | * | |
1153 | * Returns: errno | |
1154 | */ | |
1155 | ||
1156 | int gfs2_readlinki(struct gfs2_inode *ip, char **buf, unsigned int *len) | |
1157 | { | |
1158 | struct gfs2_holder i_gh; | |
1159 | struct buffer_head *dibh; | |
1160 | unsigned int x; | |
1161 | int error; | |
1162 | ||
719ee344 SW |
1163 | gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh); |
1164 | error = gfs2_glock_nq(&i_gh); | |
b3b94faa DT |
1165 | if (error) { |
1166 | gfs2_holder_uninit(&i_gh); | |
1167 | return error; | |
1168 | } | |
1169 | ||
1170 | if (!ip->i_di.di_size) { | |
1171 | gfs2_consist_inode(ip); | |
1172 | error = -EIO; | |
1173 | goto out; | |
1174 | } | |
1175 | ||
1176 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1177 | if (error) | |
1178 | goto out; | |
1179 | ||
1180 | x = ip->i_di.di_size + 1; | |
1181 | if (x > *len) { | |
16c5f06f | 1182 | *buf = kmalloc(x, GFP_NOFS); |
b3b94faa DT |
1183 | if (!*buf) { |
1184 | error = -ENOMEM; | |
1185 | goto out_brelse; | |
1186 | } | |
1187 | } | |
1188 | ||
1189 | memcpy(*buf, dibh->b_data + sizeof(struct gfs2_dinode), x); | |
1190 | *len = x; | |
1191 | ||
feaa7bba | 1192 | out_brelse: |
b3b94faa | 1193 | brelse(dibh); |
feaa7bba | 1194 | out: |
b3b94faa | 1195 | gfs2_glock_dq_uninit(&i_gh); |
b3b94faa DT |
1196 | return error; |
1197 | } | |
1198 | ||
b3b94faa DT |
1199 | static int |
1200 | __gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr) | |
1201 | { | |
1202 | struct buffer_head *dibh; | |
1203 | int error; | |
1204 | ||
1205 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1206 | if (!error) { | |
feaa7bba SW |
1207 | error = inode_setattr(&ip->i_inode, attr); |
1208 | gfs2_assert_warn(GFS2_SB(&ip->i_inode), !error); | |
d4e9c4c3 | 1209 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
539e5d6b | 1210 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa DT |
1211 | brelse(dibh); |
1212 | } | |
1213 | return error; | |
1214 | } | |
1215 | ||
1216 | /** | |
1217 | * gfs2_setattr_simple - | |
1218 | * @ip: | |
1219 | * @attr: | |
1220 | * | |
1221 | * Called with a reference on the vnode. | |
1222 | * | |
1223 | * Returns: errno | |
1224 | */ | |
1225 | ||
1226 | int gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr) | |
1227 | { | |
1228 | int error; | |
1229 | ||
5c676f6d | 1230 | if (current->journal_info) |
b3b94faa DT |
1231 | return __gfs2_setattr_simple(ip, attr); |
1232 | ||
feaa7bba | 1233 | error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE, 0); |
b3b94faa DT |
1234 | if (error) |
1235 | return error; | |
1236 | ||
1237 | error = __gfs2_setattr_simple(ip, attr); | |
feaa7bba | 1238 | gfs2_trans_end(GFS2_SB(&ip->i_inode)); |
b3b94faa DT |
1239 | return error; |
1240 | } | |
1241 | ||
bb8d8a6f SW |
1242 | void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf) |
1243 | { | |
1244 | const struct gfs2_dinode_host *di = &ip->i_di; | |
1245 | struct gfs2_dinode *str = buf; | |
1246 | ||
1247 | str->di_header.mh_magic = cpu_to_be32(GFS2_MAGIC); | |
1248 | str->di_header.mh_type = cpu_to_be32(GFS2_METATYPE_DI); | |
1249 | str->di_header.__pad0 = 0; | |
1250 | str->di_header.mh_format = cpu_to_be32(GFS2_FORMAT_DI); | |
1251 | str->di_header.__pad1 = 0; | |
1252 | str->di_num.no_addr = cpu_to_be64(ip->i_no_addr); | |
1253 | str->di_num.no_formal_ino = cpu_to_be64(ip->i_no_formal_ino); | |
1254 | str->di_mode = cpu_to_be32(ip->i_inode.i_mode); | |
1255 | str->di_uid = cpu_to_be32(ip->i_inode.i_uid); | |
1256 | str->di_gid = cpu_to_be32(ip->i_inode.i_gid); | |
1257 | str->di_nlink = cpu_to_be32(ip->i_inode.i_nlink); | |
1258 | str->di_size = cpu_to_be64(di->di_size); | |
77658aad | 1259 | str->di_blocks = cpu_to_be64(gfs2_get_inode_blocks(&ip->i_inode)); |
bb8d8a6f SW |
1260 | str->di_atime = cpu_to_be64(ip->i_inode.i_atime.tv_sec); |
1261 | str->di_mtime = cpu_to_be64(ip->i_inode.i_mtime.tv_sec); | |
1262 | str->di_ctime = cpu_to_be64(ip->i_inode.i_ctime.tv_sec); | |
1263 | ||
ce276b06 SW |
1264 | str->di_goal_meta = cpu_to_be64(ip->i_goal); |
1265 | str->di_goal_data = cpu_to_be64(ip->i_goal); | |
bcf0b5b3 | 1266 | str->di_generation = cpu_to_be64(ip->i_generation); |
bb8d8a6f SW |
1267 | |
1268 | str->di_flags = cpu_to_be32(di->di_flags); | |
ecc30c79 | 1269 | str->di_height = cpu_to_be16(ip->i_height); |
bb8d8a6f SW |
1270 | str->di_payload_format = cpu_to_be32(S_ISDIR(ip->i_inode.i_mode) && |
1271 | !(ip->i_di.di_flags & GFS2_DIF_EXHASH) ? | |
1272 | GFS2_FORMAT_DE : 0); | |
9a004508 | 1273 | str->di_depth = cpu_to_be16(ip->i_depth); |
bb8d8a6f SW |
1274 | str->di_entries = cpu_to_be32(di->di_entries); |
1275 | ||
1276 | str->di_eattr = cpu_to_be64(di->di_eattr); | |
4bd91ba1 SW |
1277 | str->di_atime_nsec = cpu_to_be32(ip->i_inode.i_atime.tv_nsec); |
1278 | str->di_mtime_nsec = cpu_to_be32(ip->i_inode.i_mtime.tv_nsec); | |
1279 | str->di_ctime_nsec = cpu_to_be32(ip->i_inode.i_ctime.tv_nsec); | |
bb8d8a6f SW |
1280 | } |
1281 | ||
1282 | void gfs2_dinode_print(const struct gfs2_inode *ip) | |
1283 | { | |
1284 | const struct gfs2_dinode_host *di = &ip->i_di; | |
1285 | ||
1286 | printk(KERN_INFO " no_formal_ino = %llu\n", | |
1287 | (unsigned long long)ip->i_no_formal_ino); | |
1288 | printk(KERN_INFO " no_addr = %llu\n", | |
1289 | (unsigned long long)ip->i_no_addr); | |
1290 | printk(KERN_INFO " di_size = %llu\n", (unsigned long long)di->di_size); | |
77658aad SW |
1291 | printk(KERN_INFO " blocks = %llu\n", |
1292 | (unsigned long long)gfs2_get_inode_blocks(&ip->i_inode)); | |
ce276b06 SW |
1293 | printk(KERN_INFO " i_goal = %llu\n", |
1294 | (unsigned long long)ip->i_goal); | |
bb8d8a6f | 1295 | printk(KERN_INFO " di_flags = 0x%.8X\n", di->di_flags); |
ca390601 | 1296 | printk(KERN_INFO " i_height = %u\n", ip->i_height); |
9a004508 | 1297 | printk(KERN_INFO " i_depth = %u\n", ip->i_depth); |
bb8d8a6f SW |
1298 | printk(KERN_INFO " di_entries = %u\n", di->di_entries); |
1299 | printk(KERN_INFO " di_eattr = %llu\n", | |
1300 | (unsigned long long)di->di_eattr); | |
1301 | } | |
1302 |