Commit | Line | Data |
---|---|---|
b3b94faa DT |
1 | /* |
2 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. | |
3a8a9a10 | 3 | * Copyright (C) 2004-2006 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> |
b3b94faa DT |
21 | |
22 | #include "gfs2.h" | |
5c676f6d | 23 | #include "incore.h" |
b3b94faa DT |
24 | #include "acl.h" |
25 | #include "bmap.h" | |
26 | #include "dir.h" | |
27 | #include "eattr.h" | |
28 | #include "glock.h" | |
29 | #include "glops.h" | |
30 | #include "inode.h" | |
31 | #include "log.h" | |
32 | #include "meta_io.h" | |
33 | #include "ops_address.h" | |
34 | #include "ops_file.h" | |
35 | #include "ops_inode.h" | |
36 | #include "quota.h" | |
37 | #include "rgrp.h" | |
38 | #include "trans.h" | |
5c676f6d | 39 | #include "util.h" |
b3b94faa DT |
40 | |
41 | /** | |
4340fe62 | 42 | * gfs2_inode_attr_in - Copy attributes from the dinode into the VFS inode |
b3b94faa DT |
43 | * @ip: The GFS2 inode (with embedded disk inode data) |
44 | * @inode: The Linux VFS inode | |
45 | * | |
46 | */ | |
47 | ||
4340fe62 | 48 | void gfs2_inode_attr_in(struct gfs2_inode *ip) |
b3b94faa | 49 | { |
4340fe62 | 50 | struct inode *inode = &ip->i_inode; |
3ca68df6 | 51 | struct gfs2_dinode_host *di = &ip->i_di; |
4340fe62 SW |
52 | |
53 | inode->i_ino = ip->i_num.no_addr; | |
b3b94faa | 54 | |
c2668711 | 55 | switch (di->di_mode & S_IFMT) { |
b3b94faa DT |
56 | case S_IFBLK: |
57 | case S_IFCHR: | |
c2668711 | 58 | inode->i_rdev = MKDEV(di->di_major, di->di_minor); |
b3b94faa DT |
59 | break; |
60 | default: | |
61 | inode->i_rdev = 0; | |
62 | break; | |
63 | }; | |
64 | ||
c2668711 SW |
65 | inode->i_mode = di->di_mode; |
66 | inode->i_nlink = di->di_nlink; | |
67 | inode->i_uid = di->di_uid; | |
68 | inode->i_gid = di->di_gid; | |
69 | i_size_write(inode, di->di_size); | |
70 | inode->i_atime.tv_sec = di->di_atime; | |
71 | inode->i_mtime.tv_sec = di->di_mtime; | |
72 | inode->i_ctime.tv_sec = di->di_ctime; | |
b3b94faa DT |
73 | inode->i_atime.tv_nsec = 0; |
74 | inode->i_mtime.tv_nsec = 0; | |
75 | inode->i_ctime.tv_nsec = 0; | |
c2668711 | 76 | inode->i_blocks = di->di_blocks << |
feaa7bba | 77 | (GFS2_SB(inode)->sd_sb.sb_bsize_shift - GFS2_BASIC_BLOCK_SHIFT); |
b3b94faa | 78 | |
c2668711 | 79 | if (di->di_flags & GFS2_DIF_IMMUTABLE) |
b3b94faa DT |
80 | inode->i_flags |= S_IMMUTABLE; |
81 | else | |
82 | inode->i_flags &= ~S_IMMUTABLE; | |
83 | ||
c2668711 | 84 | if (di->di_flags & GFS2_DIF_APPENDONLY) |
b3b94faa DT |
85 | inode->i_flags |= S_APPEND; |
86 | else | |
87 | inode->i_flags &= ~S_APPEND; | |
88 | } | |
89 | ||
b3b94faa DT |
90 | /** |
91 | * gfs2_inode_attr_out - Copy attributes from VFS inode into the dinode | |
92 | * @ip: The GFS2 inode | |
93 | * | |
94 | * Only copy out the attributes that we want the VFS layer | |
95 | * to be able to modify. | |
96 | */ | |
97 | ||
98 | void gfs2_inode_attr_out(struct gfs2_inode *ip) | |
99 | { | |
feaa7bba | 100 | struct inode *inode = &ip->i_inode; |
3ca68df6 | 101 | struct gfs2_dinode_host *di = &ip->i_di; |
feaa7bba | 102 | gfs2_assert_withdraw(GFS2_SB(inode), |
75d3b817 SW |
103 | (di->di_mode & S_IFMT) == (inode->i_mode & S_IFMT)); |
104 | di->di_mode = inode->i_mode; | |
105 | di->di_uid = inode->i_uid; | |
106 | di->di_gid = inode->i_gid; | |
107 | di->di_atime = inode->i_atime.tv_sec; | |
108 | di->di_mtime = inode->i_mtime.tv_sec; | |
109 | di->di_ctime = inode->i_ctime.tv_sec; | |
b3b94faa DT |
110 | } |
111 | ||
feaa7bba SW |
112 | static int iget_test(struct inode *inode, void *opaque) |
113 | { | |
114 | struct gfs2_inode *ip = GFS2_I(inode); | |
629a21e7 | 115 | struct gfs2_inum_host *inum = opaque; |
feaa7bba SW |
116 | |
117 | if (ip && ip->i_num.no_addr == inum->no_addr) | |
118 | return 1; | |
b3b94faa | 119 | |
feaa7bba SW |
120 | return 0; |
121 | } | |
122 | ||
123 | static int iget_set(struct inode *inode, void *opaque) | |
b3b94faa | 124 | { |
feaa7bba | 125 | struct gfs2_inode *ip = GFS2_I(inode); |
629a21e7 | 126 | struct gfs2_inum_host *inum = opaque; |
b3b94faa | 127 | |
feaa7bba SW |
128 | ip->i_num = *inum; |
129 | return 0; | |
130 | } | |
b3b94faa | 131 | |
629a21e7 | 132 | struct inode *gfs2_ilookup(struct super_block *sb, struct gfs2_inum_host *inum) |
feaa7bba SW |
133 | { |
134 | return ilookup5(sb, (unsigned long)inum->no_formal_ino, | |
135 | iget_test, inum); | |
136 | } | |
b3b94faa | 137 | |
629a21e7 | 138 | static struct inode *gfs2_iget(struct super_block *sb, struct gfs2_inum_host *inum) |
feaa7bba SW |
139 | { |
140 | return iget5_locked(sb, (unsigned long)inum->no_formal_ino, | |
141 | iget_test, iget_set, inum); | |
b3b94faa DT |
142 | } |
143 | ||
144 | /** | |
feaa7bba SW |
145 | * gfs2_inode_lookup - Lookup an inode |
146 | * @sb: The super block | |
147 | * @inum: The inode number | |
148 | * @type: The type of the inode | |
b3b94faa | 149 | * |
feaa7bba | 150 | * Returns: A VFS inode, or an error |
b3b94faa DT |
151 | */ |
152 | ||
629a21e7 | 153 | struct inode *gfs2_inode_lookup(struct super_block *sb, struct gfs2_inum_host *inum, unsigned int type) |
b3b94faa | 154 | { |
feaa7bba SW |
155 | struct inode *inode = gfs2_iget(sb, inum); |
156 | struct gfs2_inode *ip = GFS2_I(inode); | |
157 | struct gfs2_glock *io_gl; | |
158 | int error; | |
b3b94faa | 159 | |
26d83ded SW |
160 | if (!inode) |
161 | return ERR_PTR(-ENOBUFS); | |
162 | ||
feaa7bba SW |
163 | if (inode->i_state & I_NEW) { |
164 | struct gfs2_sbd *sdp = GFS2_SB(inode); | |
165 | umode_t mode = DT2IF(type); | |
bba9dfd8 | 166 | inode->i_private = ip; |
feaa7bba SW |
167 | inode->i_mode = mode; |
168 | ||
169 | if (S_ISREG(mode)) { | |
170 | inode->i_op = &gfs2_file_iops; | |
171 | inode->i_fop = &gfs2_file_fops; | |
172 | inode->i_mapping->a_ops = &gfs2_file_aops; | |
173 | } else if (S_ISDIR(mode)) { | |
174 | inode->i_op = &gfs2_dir_iops; | |
175 | inode->i_fop = &gfs2_dir_fops; | |
176 | } else if (S_ISLNK(mode)) { | |
177 | inode->i_op = &gfs2_symlink_iops; | |
178 | } else { | |
179 | inode->i_op = &gfs2_dev_iops; | |
b3b94faa | 180 | } |
b3b94faa | 181 | |
feaa7bba SW |
182 | error = gfs2_glock_get(sdp, inum->no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl); |
183 | if (unlikely(error)) | |
184 | goto fail; | |
185 | ip->i_gl->gl_object = ip; | |
b3b94faa | 186 | |
feaa7bba SW |
187 | error = gfs2_glock_get(sdp, inum->no_addr, &gfs2_iopen_glops, CREATE, &io_gl); |
188 | if (unlikely(error)) | |
189 | goto fail_put; | |
b3b94faa | 190 | |
feaa7bba SW |
191 | ip->i_vn = ip->i_gl->gl_vn - 1; |
192 | error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh); | |
193 | if (unlikely(error)) | |
194 | goto fail_iopen; | |
b3b94faa | 195 | |
feaa7bba SW |
196 | gfs2_glock_put(io_gl); |
197 | unlock_new_inode(inode); | |
198 | } | |
b3b94faa DT |
199 | |
200 | return inode; | |
feaa7bba SW |
201 | fail_iopen: |
202 | gfs2_glock_put(io_gl); | |
203 | fail_put: | |
204 | ip->i_gl->gl_object = NULL; | |
205 | gfs2_glock_put(ip->i_gl); | |
206 | fail: | |
207 | iput(inode); | |
208 | return ERR_PTR(error); | |
b3b94faa DT |
209 | } |
210 | ||
af339c02 | 211 | static int gfs2_dinode_in(struct gfs2_inode *ip, const void *buf) |
ea744d01 SW |
212 | { |
213 | struct gfs2_dinode_host *di = &ip->i_di; | |
214 | const struct gfs2_dinode *str = buf; | |
215 | ||
af339c02 SW |
216 | if (ip->i_num.no_addr != be64_to_cpu(str->di_num.no_addr)) { |
217 | if (gfs2_consist_inode(ip)) | |
218 | gfs2_dinode_print(ip); | |
219 | return -EIO; | |
220 | } | |
221 | if (ip->i_num.no_formal_ino != be64_to_cpu(str->di_num.no_formal_ino)) | |
222 | return -ESTALE; | |
ea744d01 SW |
223 | |
224 | di->di_mode = be32_to_cpu(str->di_mode); | |
225 | di->di_uid = be32_to_cpu(str->di_uid); | |
226 | di->di_gid = be32_to_cpu(str->di_gid); | |
227 | di->di_nlink = be32_to_cpu(str->di_nlink); | |
228 | di->di_size = be64_to_cpu(str->di_size); | |
229 | di->di_blocks = be64_to_cpu(str->di_blocks); | |
230 | di->di_atime = be64_to_cpu(str->di_atime); | |
231 | di->di_mtime = be64_to_cpu(str->di_mtime); | |
232 | di->di_ctime = be64_to_cpu(str->di_ctime); | |
233 | di->di_major = be32_to_cpu(str->di_major); | |
234 | di->di_minor = be32_to_cpu(str->di_minor); | |
235 | ||
236 | di->di_goal_meta = be64_to_cpu(str->di_goal_meta); | |
237 | di->di_goal_data = be64_to_cpu(str->di_goal_data); | |
238 | di->di_generation = be64_to_cpu(str->di_generation); | |
239 | ||
240 | di->di_flags = be32_to_cpu(str->di_flags); | |
241 | di->di_payload_format = be32_to_cpu(str->di_payload_format); | |
242 | di->di_height = be16_to_cpu(str->di_height); | |
243 | ||
244 | di->di_depth = be16_to_cpu(str->di_depth); | |
245 | di->di_entries = be32_to_cpu(str->di_entries); | |
246 | ||
247 | di->di_eattr = be64_to_cpu(str->di_eattr); | |
af339c02 | 248 | return 0; |
ea744d01 SW |
249 | } |
250 | ||
b3b94faa DT |
251 | /** |
252 | * gfs2_inode_refresh - Refresh the incore copy of the dinode | |
253 | * @ip: The GFS2 inode | |
254 | * | |
255 | * Returns: errno | |
256 | */ | |
257 | ||
258 | int gfs2_inode_refresh(struct gfs2_inode *ip) | |
259 | { | |
260 | struct buffer_head *dibh; | |
261 | int error; | |
262 | ||
263 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
264 | if (error) | |
265 | return error; | |
266 | ||
feaa7bba | 267 | if (gfs2_metatype_check(GFS2_SB(&ip->i_inode), dibh, GFS2_METATYPE_DI)) { |
b3b94faa DT |
268 | brelse(dibh); |
269 | return -EIO; | |
270 | } | |
271 | ||
af339c02 | 272 | error = gfs2_dinode_in(ip, dibh->b_data); |
b3b94faa DT |
273 | |
274 | brelse(dibh); | |
b3b94faa DT |
275 | ip->i_vn = ip->i_gl->gl_vn; |
276 | ||
af339c02 | 277 | return error; |
b3b94faa DT |
278 | } |
279 | ||
feaa7bba | 280 | int gfs2_dinode_dealloc(struct gfs2_inode *ip) |
b3b94faa | 281 | { |
feaa7bba | 282 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa DT |
283 | struct gfs2_alloc *al; |
284 | struct gfs2_rgrpd *rgd; | |
285 | int error; | |
286 | ||
287 | if (ip->i_di.di_blocks != 1) { | |
288 | if (gfs2_consist_inode(ip)) | |
4cc14f0b | 289 | gfs2_dinode_print(ip); |
b3b94faa DT |
290 | return -EIO; |
291 | } | |
292 | ||
293 | al = gfs2_alloc_get(ip); | |
294 | ||
295 | error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE); | |
296 | if (error) | |
297 | goto out; | |
298 | ||
299 | error = gfs2_rindex_hold(sdp, &al->al_ri_gh); | |
300 | if (error) | |
301 | goto out_qs; | |
302 | ||
303 | rgd = gfs2_blk2rgrpd(sdp, ip->i_num.no_addr); | |
304 | if (!rgd) { | |
305 | gfs2_consist_inode(ip); | |
306 | error = -EIO; | |
307 | goto out_rindex_relse; | |
308 | } | |
309 | ||
310 | error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, | |
311 | &al->al_rgd_gh); | |
312 | if (error) | |
313 | goto out_rindex_relse; | |
314 | ||
420b9e5e | 315 | error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_STATFS + RES_QUOTA, 1); |
b3b94faa DT |
316 | if (error) |
317 | goto out_rg_gunlock; | |
318 | ||
319 | gfs2_trans_add_gl(ip->i_gl); | |
320 | ||
321 | gfs2_free_di(rgd, ip); | |
322 | ||
b3b94faa DT |
323 | gfs2_trans_end(sdp); |
324 | clear_bit(GLF_STICKY, &ip->i_gl->gl_flags); | |
325 | ||
feaa7bba | 326 | out_rg_gunlock: |
b3b94faa | 327 | gfs2_glock_dq_uninit(&al->al_rgd_gh); |
feaa7bba | 328 | out_rindex_relse: |
b3b94faa | 329 | gfs2_glock_dq_uninit(&al->al_ri_gh); |
feaa7bba | 330 | out_qs: |
b3b94faa | 331 | gfs2_quota_unhold(ip); |
36327521 | 332 | out: |
feaa7bba | 333 | gfs2_alloc_put(ip); |
b3b94faa DT |
334 | return error; |
335 | } | |
336 | ||
b3b94faa DT |
337 | /** |
338 | * gfs2_change_nlink - Change nlink count on inode | |
339 | * @ip: The GFS2 inode | |
340 | * @diff: The change in the nlink count required | |
341 | * | |
342 | * Returns: errno | |
343 | */ | |
344 | ||
345 | int gfs2_change_nlink(struct gfs2_inode *ip, int diff) | |
346 | { | |
feaa7bba | 347 | struct gfs2_sbd *sdp = ip->i_inode.i_sb->s_fs_info; |
b3b94faa | 348 | struct buffer_head *dibh; |
cd915493 | 349 | u32 nlink; |
b3b94faa DT |
350 | int error; |
351 | ||
29937ac6 | 352 | BUG_ON(ip->i_di.di_nlink != ip->i_inode.i_nlink); |
b3b94faa DT |
353 | nlink = ip->i_di.di_nlink + diff; |
354 | ||
355 | /* If we are reducing the nlink count, but the new value ends up being | |
356 | bigger than the old one, we must have underflowed. */ | |
357 | if (diff < 0 && nlink > ip->i_di.di_nlink) { | |
358 | if (gfs2_consist_inode(ip)) | |
4cc14f0b | 359 | gfs2_dinode_print(ip); |
b3b94faa DT |
360 | return -EIO; |
361 | } | |
362 | ||
363 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
364 | if (error) | |
365 | return error; | |
366 | ||
367 | ip->i_di.di_nlink = nlink; | |
368 | ip->i_di.di_ctime = get_seconds(); | |
29937ac6 | 369 | ip->i_inode.i_nlink = nlink; |
b3b94faa | 370 | |
d4e9c4c3 | 371 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
539e5d6b | 372 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa | 373 | brelse(dibh); |
feaa7bba | 374 | mark_inode_dirty(&ip->i_inode); |
b3b94faa | 375 | |
feaa7bba SW |
376 | if (ip->i_di.di_nlink == 0) { |
377 | struct gfs2_rgrpd *rgd; | |
378 | struct gfs2_holder ri_gh, rg_gh; | |
379 | ||
380 | error = gfs2_rindex_hold(sdp, &ri_gh); | |
381 | if (error) | |
382 | goto out; | |
383 | error = -EIO; | |
384 | rgd = gfs2_blk2rgrpd(sdp, ip->i_num.no_addr); | |
385 | if (!rgd) | |
386 | goto out_norgrp; | |
387 | error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &rg_gh); | |
388 | if (error) | |
389 | goto out_norgrp; | |
390 | ||
f92a0b6f | 391 | clear_nlink(&ip->i_inode); |
feaa7bba SW |
392 | gfs2_unlink_di(&ip->i_inode); /* mark inode unlinked */ |
393 | gfs2_glock_dq_uninit(&rg_gh); | |
394 | out_norgrp: | |
395 | gfs2_glock_dq_uninit(&ri_gh); | |
396 | } | |
397 | out: | |
398 | return error; | |
b3b94faa DT |
399 | } |
400 | ||
c752666c SW |
401 | struct inode *gfs2_lookup_simple(struct inode *dip, const char *name) |
402 | { | |
403 | struct qstr qstr; | |
71b86f56 | 404 | gfs2_str2qstr(&qstr, name); |
c752666c SW |
405 | return gfs2_lookupi(dip, &qstr, 1, NULL); |
406 | } | |
407 | ||
408 | ||
b3b94faa DT |
409 | /** |
410 | * gfs2_lookupi - Look up a filename in a directory and return its inode | |
411 | * @d_gh: An initialized holder for the directory glock | |
412 | * @name: The name of the inode to look for | |
413 | * @is_root: If 1, ignore the caller's permissions | |
414 | * @i_gh: An uninitialized holder for the new inode glock | |
415 | * | |
416 | * There will always be a vnode (Linux VFS inode) for the d_gh inode unless | |
417 | * @is_root is true. | |
418 | * | |
419 | * Returns: errno | |
420 | */ | |
421 | ||
feaa7bba SW |
422 | struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name, |
423 | int is_root, struct nameidata *nd) | |
b3b94faa | 424 | { |
c9fd4307 | 425 | struct super_block *sb = dir->i_sb; |
feaa7bba | 426 | struct gfs2_inode *dip = GFS2_I(dir); |
b3b94faa | 427 | struct gfs2_holder d_gh; |
629a21e7 | 428 | struct gfs2_inum_host inum; |
b3b94faa | 429 | unsigned int type; |
7359a19c | 430 | int error = 0; |
c752666c | 431 | struct inode *inode = NULL; |
b3b94faa DT |
432 | |
433 | if (!name->len || name->len > GFS2_FNAMESIZE) | |
c752666c | 434 | return ERR_PTR(-ENAMETOOLONG); |
b3b94faa | 435 | |
c752666c SW |
436 | if ((name->len == 1 && memcmp(name->name, ".", 1) == 0) || |
437 | (name->len == 2 && memcmp(name->name, "..", 2) == 0 && | |
438 | dir == sb->s_root->d_inode)) { | |
320dd101 SW |
439 | igrab(dir); |
440 | return dir; | |
b3b94faa DT |
441 | } |
442 | ||
443 | error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh); | |
444 | if (error) | |
c752666c | 445 | return ERR_PTR(error); |
b3b94faa DT |
446 | |
447 | if (!is_root) { | |
faf450ef | 448 | error = permission(dir, MAY_EXEC, NULL); |
b3b94faa DT |
449 | if (error) |
450 | goto out; | |
451 | } | |
452 | ||
c752666c | 453 | error = gfs2_dir_search(dir, name, &inum, &type); |
b3b94faa DT |
454 | if (error) |
455 | goto out; | |
456 | ||
feaa7bba | 457 | inode = gfs2_inode_lookup(sb, &inum, type); |
b3b94faa | 458 | |
7359a19c | 459 | out: |
b3b94faa | 460 | gfs2_glock_dq_uninit(&d_gh); |
c752666c SW |
461 | if (error == -ENOENT) |
462 | return NULL; | |
feaa7bba | 463 | return inode; |
b3b94faa DT |
464 | } |
465 | ||
cd915493 | 466 | static int pick_formal_ino_1(struct gfs2_sbd *sdp, u64 *formal_ino) |
b3b94faa | 467 | { |
feaa7bba | 468 | struct gfs2_inode *ip = GFS2_I(sdp->sd_ir_inode); |
b3b94faa | 469 | struct buffer_head *bh; |
e6972647 | 470 | struct gfs2_inum_range_host ir; |
b3b94faa DT |
471 | int error; |
472 | ||
473 | error = gfs2_trans_begin(sdp, RES_DINODE, 0); | |
474 | if (error) | |
475 | return error; | |
f55ab26a | 476 | mutex_lock(&sdp->sd_inum_mutex); |
b3b94faa DT |
477 | |
478 | error = gfs2_meta_inode_buffer(ip, &bh); | |
479 | if (error) { | |
f55ab26a | 480 | mutex_unlock(&sdp->sd_inum_mutex); |
b3b94faa DT |
481 | gfs2_trans_end(sdp); |
482 | return error; | |
483 | } | |
484 | ||
485 | gfs2_inum_range_in(&ir, bh->b_data + sizeof(struct gfs2_dinode)); | |
486 | ||
487 | if (ir.ir_length) { | |
488 | *formal_ino = ir.ir_start++; | |
489 | ir.ir_length--; | |
d4e9c4c3 | 490 | gfs2_trans_add_bh(ip->i_gl, bh, 1); |
b3b94faa DT |
491 | gfs2_inum_range_out(&ir, |
492 | bh->b_data + sizeof(struct gfs2_dinode)); | |
493 | brelse(bh); | |
f55ab26a | 494 | mutex_unlock(&sdp->sd_inum_mutex); |
b3b94faa DT |
495 | gfs2_trans_end(sdp); |
496 | return 0; | |
497 | } | |
498 | ||
499 | brelse(bh); | |
500 | ||
f55ab26a | 501 | mutex_unlock(&sdp->sd_inum_mutex); |
b3b94faa DT |
502 | gfs2_trans_end(sdp); |
503 | ||
504 | return 1; | |
505 | } | |
506 | ||
cd915493 | 507 | static int pick_formal_ino_2(struct gfs2_sbd *sdp, u64 *formal_ino) |
b3b94faa | 508 | { |
feaa7bba SW |
509 | struct gfs2_inode *ip = GFS2_I(sdp->sd_ir_inode); |
510 | struct gfs2_inode *m_ip = GFS2_I(sdp->sd_inum_inode); | |
b3b94faa DT |
511 | struct gfs2_holder gh; |
512 | struct buffer_head *bh; | |
e6972647 | 513 | struct gfs2_inum_range_host ir; |
b3b94faa DT |
514 | int error; |
515 | ||
516 | error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); | |
517 | if (error) | |
518 | return error; | |
519 | ||
520 | error = gfs2_trans_begin(sdp, 2 * RES_DINODE, 0); | |
521 | if (error) | |
522 | goto out; | |
f55ab26a | 523 | mutex_lock(&sdp->sd_inum_mutex); |
b3b94faa DT |
524 | |
525 | error = gfs2_meta_inode_buffer(ip, &bh); | |
526 | if (error) | |
527 | goto out_end_trans; | |
907b9bce | 528 | |
b3b94faa DT |
529 | gfs2_inum_range_in(&ir, bh->b_data + sizeof(struct gfs2_dinode)); |
530 | ||
531 | if (!ir.ir_length) { | |
532 | struct buffer_head *m_bh; | |
cd915493 | 533 | u64 x, y; |
b44b84d7 | 534 | __be64 z; |
b3b94faa DT |
535 | |
536 | error = gfs2_meta_inode_buffer(m_ip, &m_bh); | |
537 | if (error) | |
538 | goto out_brelse; | |
539 | ||
b44b84d7 AV |
540 | z = *(__be64 *)(m_bh->b_data + sizeof(struct gfs2_dinode)); |
541 | x = y = be64_to_cpu(z); | |
b3b94faa DT |
542 | ir.ir_start = x; |
543 | ir.ir_length = GFS2_INUM_QUANTUM; | |
544 | x += GFS2_INUM_QUANTUM; | |
545 | if (x < y) | |
546 | gfs2_consist_inode(m_ip); | |
b44b84d7 | 547 | z = cpu_to_be64(x); |
d4e9c4c3 | 548 | gfs2_trans_add_bh(m_ip->i_gl, m_bh, 1); |
b44b84d7 | 549 | *(__be64 *)(m_bh->b_data + sizeof(struct gfs2_dinode)) = z; |
b3b94faa DT |
550 | |
551 | brelse(m_bh); | |
552 | } | |
553 | ||
554 | *formal_ino = ir.ir_start++; | |
555 | ir.ir_length--; | |
556 | ||
d4e9c4c3 | 557 | gfs2_trans_add_bh(ip->i_gl, bh, 1); |
b3b94faa DT |
558 | gfs2_inum_range_out(&ir, bh->b_data + sizeof(struct gfs2_dinode)); |
559 | ||
420b9e5e | 560 | out_brelse: |
b3b94faa | 561 | brelse(bh); |
420b9e5e | 562 | out_end_trans: |
f55ab26a | 563 | mutex_unlock(&sdp->sd_inum_mutex); |
b3b94faa | 564 | gfs2_trans_end(sdp); |
420b9e5e | 565 | out: |
b3b94faa | 566 | gfs2_glock_dq_uninit(&gh); |
b3b94faa DT |
567 | return error; |
568 | } | |
569 | ||
cd915493 | 570 | static int pick_formal_ino(struct gfs2_sbd *sdp, u64 *inum) |
b3b94faa DT |
571 | { |
572 | int error; | |
573 | ||
574 | error = pick_formal_ino_1(sdp, inum); | |
575 | if (error <= 0) | |
576 | return error; | |
577 | ||
578 | error = pick_formal_ino_2(sdp, inum); | |
579 | ||
580 | return error; | |
581 | } | |
582 | ||
583 | /** | |
584 | * create_ok - OK to create a new on-disk inode here? | |
585 | * @dip: Directory in which dinode is to be created | |
586 | * @name: Name of new dinode | |
587 | * @mode: | |
588 | * | |
589 | * Returns: errno | |
590 | */ | |
591 | ||
feaa7bba | 592 | static int create_ok(struct gfs2_inode *dip, const struct qstr *name, |
b3b94faa DT |
593 | unsigned int mode) |
594 | { | |
595 | int error; | |
596 | ||
faf450ef | 597 | error = permission(&dip->i_inode, MAY_WRITE | MAY_EXEC, NULL); |
b3b94faa DT |
598 | if (error) |
599 | return error; | |
600 | ||
601 | /* Don't create entries in an unlinked directory */ | |
602 | if (!dip->i_di.di_nlink) | |
603 | return -EPERM; | |
604 | ||
feaa7bba | 605 | error = gfs2_dir_search(&dip->i_inode, name, NULL, NULL); |
b3b94faa DT |
606 | switch (error) { |
607 | case -ENOENT: | |
608 | error = 0; | |
609 | break; | |
610 | case 0: | |
611 | return -EEXIST; | |
612 | default: | |
613 | return error; | |
614 | } | |
615 | ||
cd915493 | 616 | if (dip->i_di.di_entries == (u32)-1) |
b3b94faa | 617 | return -EFBIG; |
cd915493 | 618 | if (S_ISDIR(mode) && dip->i_di.di_nlink == (u32)-1) |
b3b94faa DT |
619 | return -EMLINK; |
620 | ||
621 | return 0; | |
622 | } | |
623 | ||
624 | static void munge_mode_uid_gid(struct gfs2_inode *dip, unsigned int *mode, | |
625 | unsigned int *uid, unsigned int *gid) | |
626 | { | |
feaa7bba | 627 | if (GFS2_SB(&dip->i_inode)->sd_args.ar_suiddir && |
420b9e5e | 628 | (dip->i_di.di_mode & S_ISUID) && dip->i_di.di_uid) { |
b3b94faa DT |
629 | if (S_ISDIR(*mode)) |
630 | *mode |= S_ISUID; | |
631 | else if (dip->i_di.di_uid != current->fsuid) | |
632 | *mode &= ~07111; | |
633 | *uid = dip->i_di.di_uid; | |
634 | } else | |
635 | *uid = current->fsuid; | |
636 | ||
637 | if (dip->i_di.di_mode & S_ISGID) { | |
638 | if (S_ISDIR(*mode)) | |
639 | *mode |= S_ISGID; | |
640 | *gid = dip->i_di.di_gid; | |
641 | } else | |
642 | *gid = current->fsgid; | |
643 | } | |
644 | ||
629a21e7 | 645 | static int alloc_dinode(struct gfs2_inode *dip, struct gfs2_inum_host *inum, |
4340fe62 | 646 | u64 *generation) |
b3b94faa | 647 | { |
feaa7bba | 648 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); |
b3b94faa DT |
649 | int error; |
650 | ||
651 | gfs2_alloc_get(dip); | |
652 | ||
653 | dip->i_alloc.al_requested = RES_DINODE; | |
654 | error = gfs2_inplace_reserve(dip); | |
655 | if (error) | |
656 | goto out; | |
657 | ||
feaa7bba | 658 | error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_STATFS, 0); |
b3b94faa DT |
659 | if (error) |
660 | goto out_ipreserv; | |
661 | ||
4340fe62 | 662 | inum->no_addr = gfs2_alloc_di(dip, generation); |
b3b94faa DT |
663 | |
664 | gfs2_trans_end(sdp); | |
665 | ||
4340fe62 | 666 | out_ipreserv: |
b3b94faa | 667 | gfs2_inplace_release(dip); |
4340fe62 | 668 | out: |
b3b94faa | 669 | gfs2_alloc_put(dip); |
b3b94faa DT |
670 | return error; |
671 | } | |
672 | ||
673 | /** | |
674 | * init_dinode - Fill in a new dinode structure | |
675 | * @dip: the directory this inode is being created in | |
676 | * @gl: The glock covering the new inode | |
677 | * @inum: the inode number | |
678 | * @mode: the file permissions | |
679 | * @uid: | |
680 | * @gid: | |
681 | * | |
682 | */ | |
683 | ||
684 | static void init_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl, | |
629a21e7 | 685 | const struct gfs2_inum_host *inum, unsigned int mode, |
4340fe62 SW |
686 | unsigned int uid, unsigned int gid, |
687 | const u64 *generation) | |
b3b94faa | 688 | { |
feaa7bba | 689 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); |
b96ca4fa | 690 | struct gfs2_dinode *di; |
b3b94faa DT |
691 | struct buffer_head *dibh; |
692 | ||
693 | dibh = gfs2_meta_new(gl, inum->no_addr); | |
d4e9c4c3 | 694 | gfs2_trans_add_bh(gl, dibh, 1); |
b3b94faa DT |
695 | gfs2_metatype_set(dibh, GFS2_METATYPE_DI, GFS2_FORMAT_DI); |
696 | gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode)); | |
b96ca4fa SW |
697 | di = (struct gfs2_dinode *)dibh->b_data; |
698 | ||
2442a098 SW |
699 | di->di_num.no_formal_ino = cpu_to_be64(inum->no_formal_ino); |
700 | di->di_num.no_addr = cpu_to_be64(inum->no_addr); | |
b96ca4fa SW |
701 | di->di_mode = cpu_to_be32(mode); |
702 | di->di_uid = cpu_to_be32(uid); | |
703 | di->di_gid = cpu_to_be32(gid); | |
704 | di->di_nlink = cpu_to_be32(0); | |
705 | di->di_size = cpu_to_be64(0); | |
706 | di->di_blocks = cpu_to_be64(1); | |
707 | di->di_atime = di->di_mtime = di->di_ctime = cpu_to_be64(get_seconds()); | |
708 | di->di_major = di->di_minor = cpu_to_be32(0); | |
709 | di->di_goal_meta = di->di_goal_data = cpu_to_be64(inum->no_addr); | |
4340fe62 | 710 | di->di_generation = cpu_to_be64(*generation); |
b96ca4fa | 711 | di->di_flags = cpu_to_be32(0); |
b3b94faa DT |
712 | |
713 | if (S_ISREG(mode)) { | |
714 | if ((dip->i_di.di_flags & GFS2_DIF_INHERIT_JDATA) || | |
715 | gfs2_tune_get(sdp, gt_new_files_jdata)) | |
b96ca4fa | 716 | di->di_flags |= cpu_to_be32(GFS2_DIF_JDATA); |
b3b94faa DT |
717 | if ((dip->i_di.di_flags & GFS2_DIF_INHERIT_DIRECTIO) || |
718 | gfs2_tune_get(sdp, gt_new_files_directio)) | |
b96ca4fa | 719 | di->di_flags |= cpu_to_be32(GFS2_DIF_DIRECTIO); |
b3b94faa | 720 | } else if (S_ISDIR(mode)) { |
568f4c96 SW |
721 | di->di_flags |= cpu_to_be32(dip->i_di.di_flags & |
722 | GFS2_DIF_INHERIT_DIRECTIO); | |
723 | di->di_flags |= cpu_to_be32(dip->i_di.di_flags & | |
724 | GFS2_DIF_INHERIT_JDATA); | |
b3b94faa DT |
725 | } |
726 | ||
b96ca4fa | 727 | di->__pad1 = 0; |
b2a580d8 | 728 | di->di_payload_format = cpu_to_be32(0); |
b96ca4fa SW |
729 | di->di_height = cpu_to_be32(0); |
730 | di->__pad2 = 0; | |
731 | di->__pad3 = 0; | |
732 | di->di_depth = cpu_to_be16(0); | |
733 | di->di_entries = cpu_to_be32(0); | |
734 | memset(&di->__pad4, 0, sizeof(di->__pad4)); | |
735 | di->di_eattr = cpu_to_be64(0); | |
736 | memset(&di->di_reserved, 0, sizeof(di->di_reserved)); | |
737 | ||
b3b94faa DT |
738 | brelse(dibh); |
739 | } | |
740 | ||
741 | static int make_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl, | |
629a21e7 | 742 | unsigned int mode, const struct gfs2_inum_host *inum, |
4340fe62 | 743 | const u64 *generation) |
b3b94faa | 744 | { |
feaa7bba | 745 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); |
b3b94faa DT |
746 | unsigned int uid, gid; |
747 | int error; | |
748 | ||
749 | munge_mode_uid_gid(dip, &mode, &uid, &gid); | |
b3b94faa DT |
750 | gfs2_alloc_get(dip); |
751 | ||
752 | error = gfs2_quota_lock(dip, uid, gid); | |
753 | if (error) | |
754 | goto out; | |
755 | ||
756 | error = gfs2_quota_check(dip, uid, gid); | |
757 | if (error) | |
758 | goto out_quota; | |
759 | ||
feaa7bba | 760 | error = gfs2_trans_begin(sdp, RES_DINODE + RES_QUOTA, 0); |
b3b94faa DT |
761 | if (error) |
762 | goto out_quota; | |
763 | ||
4340fe62 | 764 | init_dinode(dip, gl, inum, mode, uid, gid, generation); |
b3b94faa | 765 | gfs2_quota_change(dip, +1, uid, gid); |
b3b94faa DT |
766 | gfs2_trans_end(sdp); |
767 | ||
feaa7bba | 768 | out_quota: |
b3b94faa | 769 | gfs2_quota_unlock(dip); |
feaa7bba | 770 | out: |
b3b94faa | 771 | gfs2_alloc_put(dip); |
b3b94faa DT |
772 | return error; |
773 | } | |
774 | ||
feaa7bba SW |
775 | static int link_dinode(struct gfs2_inode *dip, const struct qstr *name, |
776 | struct gfs2_inode *ip) | |
b3b94faa | 777 | { |
feaa7bba | 778 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); |
b3b94faa DT |
779 | struct gfs2_alloc *al; |
780 | int alloc_required; | |
781 | struct buffer_head *dibh; | |
782 | int error; | |
783 | ||
784 | al = gfs2_alloc_get(dip); | |
785 | ||
786 | error = gfs2_quota_lock(dip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE); | |
787 | if (error) | |
788 | goto fail; | |
789 | ||
feaa7bba | 790 | error = alloc_required = gfs2_diradd_alloc_required(&dip->i_inode, name); |
c752666c SW |
791 | if (alloc_required < 0) |
792 | goto fail; | |
b3b94faa DT |
793 | if (alloc_required) { |
794 | error = gfs2_quota_check(dip, dip->i_di.di_uid, | |
795 | dip->i_di.di_gid); | |
796 | if (error) | |
797 | goto fail_quota_locks; | |
798 | ||
799 | al->al_requested = sdp->sd_max_dirres; | |
800 | ||
801 | error = gfs2_inplace_reserve(dip); | |
802 | if (error) | |
803 | goto fail_quota_locks; | |
804 | ||
320dd101 | 805 | error = gfs2_trans_begin(sdp, sdp->sd_max_dirres + |
b3b94faa | 806 | al->al_rgd->rd_ri.ri_length + |
907b9bce | 807 | 2 * RES_DINODE + |
b3b94faa DT |
808 | RES_STATFS + RES_QUOTA, 0); |
809 | if (error) | |
810 | goto fail_ipreserv; | |
811 | } else { | |
feaa7bba | 812 | error = gfs2_trans_begin(sdp, RES_LEAF + 2 * RES_DINODE, 0); |
b3b94faa DT |
813 | if (error) |
814 | goto fail_quota_locks; | |
815 | } | |
816 | ||
feaa7bba | 817 | error = gfs2_dir_add(&dip->i_inode, name, &ip->i_num, IF2DT(ip->i_di.di_mode)); |
b3b94faa DT |
818 | if (error) |
819 | goto fail_end_trans; | |
820 | ||
821 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
822 | if (error) | |
823 | goto fail_end_trans; | |
824 | ip->i_di.di_nlink = 1; | |
d4e9c4c3 | 825 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
539e5d6b | 826 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa | 827 | brelse(dibh); |
b3b94faa DT |
828 | return 0; |
829 | ||
320dd101 | 830 | fail_end_trans: |
b3b94faa DT |
831 | gfs2_trans_end(sdp); |
832 | ||
320dd101 | 833 | fail_ipreserv: |
b3b94faa DT |
834 | if (dip->i_alloc.al_rgd) |
835 | gfs2_inplace_release(dip); | |
836 | ||
320dd101 | 837 | fail_quota_locks: |
b3b94faa DT |
838 | gfs2_quota_unlock(dip); |
839 | ||
320dd101 | 840 | fail: |
b3b94faa | 841 | gfs2_alloc_put(dip); |
b3b94faa DT |
842 | return error; |
843 | } | |
844 | ||
fcb47e0b RH |
845 | static int gfs2_security_init(struct gfs2_inode *dip, struct gfs2_inode *ip) |
846 | { | |
847 | int err; | |
848 | size_t len; | |
849 | void *value; | |
850 | char *name; | |
851 | struct gfs2_ea_request er; | |
852 | ||
853 | err = security_inode_init_security(&ip->i_inode, &dip->i_inode, | |
854 | &name, &value, &len); | |
855 | ||
856 | if (err) { | |
857 | if (err == -EOPNOTSUPP) | |
858 | return 0; | |
859 | return err; | |
860 | } | |
861 | ||
862 | memset(&er, 0, sizeof(struct gfs2_ea_request)); | |
863 | ||
864 | er.er_type = GFS2_EATYPE_SECURITY; | |
865 | er.er_name = name; | |
866 | er.er_data = value; | |
867 | er.er_name_len = strlen(name); | |
868 | er.er_data_len = len; | |
869 | ||
870 | err = gfs2_ea_set_i(ip, &er); | |
871 | ||
872 | kfree(value); | |
873 | kfree(name); | |
874 | ||
875 | return err; | |
876 | } | |
877 | ||
b3b94faa DT |
878 | /** |
879 | * gfs2_createi - Create a new inode | |
880 | * @ghs: An array of two holders | |
881 | * @name: The name of the new file | |
882 | * @mode: the permissions on the new inode | |
883 | * | |
884 | * @ghs[0] is an initialized holder for the directory | |
885 | * @ghs[1] is the holder for the inode lock | |
886 | * | |
7359a19c | 887 | * If the return value is not NULL, the glocks on both the directory and the new |
b3b94faa DT |
888 | * file are held. A transaction has been started and an inplace reservation |
889 | * is held, as well. | |
890 | * | |
7359a19c | 891 | * Returns: An inode |
b3b94faa DT |
892 | */ |
893 | ||
feaa7bba | 894 | struct inode *gfs2_createi(struct gfs2_holder *ghs, const struct qstr *name, |
568f4c96 | 895 | unsigned int mode) |
b3b94faa | 896 | { |
7359a19c | 897 | struct inode *inode; |
5c676f6d | 898 | struct gfs2_inode *dip = ghs->gh_gl->gl_object; |
feaa7bba SW |
899 | struct inode *dir = &dip->i_inode; |
900 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); | |
629a21e7 | 901 | struct gfs2_inum_host inum; |
b3b94faa | 902 | int error; |
4340fe62 | 903 | u64 generation; |
b3b94faa DT |
904 | |
905 | if (!name->len || name->len > GFS2_FNAMESIZE) | |
7359a19c | 906 | return ERR_PTR(-ENAMETOOLONG); |
b3b94faa | 907 | |
b3b94faa DT |
908 | gfs2_holder_reinit(LM_ST_EXCLUSIVE, 0, ghs); |
909 | error = gfs2_glock_nq(ghs); | |
910 | if (error) | |
911 | goto fail; | |
912 | ||
913 | error = create_ok(dip, name, mode); | |
914 | if (error) | |
915 | goto fail_gunlock; | |
916 | ||
feaa7bba | 917 | error = pick_formal_ino(sdp, &inum.no_formal_ino); |
b3b94faa DT |
918 | if (error) |
919 | goto fail_gunlock; | |
920 | ||
4340fe62 | 921 | error = alloc_dinode(dip, &inum, &generation); |
b3b94faa DT |
922 | if (error) |
923 | goto fail_gunlock; | |
924 | ||
feaa7bba | 925 | if (inum.no_addr < dip->i_num.no_addr) { |
b3b94faa DT |
926 | gfs2_glock_dq(ghs); |
927 | ||
feaa7bba | 928 | error = gfs2_glock_nq_num(sdp, inum.no_addr, |
320dd101 SW |
929 | &gfs2_inode_glops, LM_ST_EXCLUSIVE, |
930 | GL_SKIP, ghs + 1); | |
b3b94faa | 931 | if (error) { |
7359a19c | 932 | return ERR_PTR(error); |
b3b94faa DT |
933 | } |
934 | ||
935 | gfs2_holder_reinit(LM_ST_EXCLUSIVE, 0, ghs); | |
936 | error = gfs2_glock_nq(ghs); | |
937 | if (error) { | |
938 | gfs2_glock_dq_uninit(ghs + 1); | |
7359a19c | 939 | return ERR_PTR(error); |
b3b94faa DT |
940 | } |
941 | ||
942 | error = create_ok(dip, name, mode); | |
943 | if (error) | |
944 | goto fail_gunlock2; | |
945 | } else { | |
feaa7bba | 946 | error = gfs2_glock_nq_num(sdp, inum.no_addr, |
320dd101 SW |
947 | &gfs2_inode_glops, LM_ST_EXCLUSIVE, |
948 | GL_SKIP, ghs + 1); | |
b3b94faa DT |
949 | if (error) |
950 | goto fail_gunlock; | |
951 | } | |
952 | ||
4340fe62 | 953 | error = make_dinode(dip, ghs[1].gh_gl, mode, &inum, &generation); |
b3b94faa DT |
954 | if (error) |
955 | goto fail_gunlock2; | |
956 | ||
feaa7bba SW |
957 | inode = gfs2_inode_lookup(dir->i_sb, &inum, IF2DT(mode)); |
958 | if (IS_ERR(inode)) | |
b3b94faa DT |
959 | goto fail_gunlock2; |
960 | ||
feaa7bba | 961 | error = gfs2_inode_refresh(GFS2_I(inode)); |
b3b94faa DT |
962 | if (error) |
963 | goto fail_iput; | |
964 | ||
feaa7bba | 965 | error = gfs2_acl_create(dip, GFS2_I(inode)); |
b3b94faa DT |
966 | if (error) |
967 | goto fail_iput; | |
968 | ||
fcb47e0b RH |
969 | error = gfs2_security_init(dip, GFS2_I(inode)); |
970 | if (error) | |
971 | goto fail_iput; | |
972 | ||
feaa7bba | 973 | error = link_dinode(dip, name, GFS2_I(inode)); |
b3b94faa DT |
974 | if (error) |
975 | goto fail_iput; | |
976 | ||
7359a19c SW |
977 | if (!inode) |
978 | return ERR_PTR(-ENOMEM); | |
979 | return inode; | |
b3b94faa | 980 | |
320dd101 | 981 | fail_iput: |
feaa7bba | 982 | iput(inode); |
320dd101 | 983 | fail_gunlock2: |
b3b94faa | 984 | gfs2_glock_dq_uninit(ghs + 1); |
320dd101 | 985 | fail_gunlock: |
b3b94faa | 986 | gfs2_glock_dq(ghs); |
320dd101 | 987 | fail: |
7359a19c | 988 | return ERR_PTR(error); |
b3b94faa DT |
989 | } |
990 | ||
b3b94faa DT |
991 | /** |
992 | * gfs2_rmdiri - Remove a directory | |
993 | * @dip: The parent directory of the directory to be removed | |
994 | * @name: The name of the directory to be removed | |
995 | * @ip: The GFS2 inode of the directory to be removed | |
996 | * | |
997 | * Assumes Glocks on dip and ip are held | |
998 | * | |
999 | * Returns: errno | |
1000 | */ | |
1001 | ||
feaa7bba SW |
1002 | int gfs2_rmdiri(struct gfs2_inode *dip, const struct qstr *name, |
1003 | struct gfs2_inode *ip) | |
b3b94faa | 1004 | { |
b3b94faa DT |
1005 | struct qstr dotname; |
1006 | int error; | |
1007 | ||
1008 | if (ip->i_di.di_entries != 2) { | |
1009 | if (gfs2_consist_inode(ip)) | |
4cc14f0b | 1010 | gfs2_dinode_print(ip); |
b3b94faa DT |
1011 | return -EIO; |
1012 | } | |
1013 | ||
1014 | error = gfs2_dir_del(dip, name); | |
1015 | if (error) | |
1016 | return error; | |
1017 | ||
1018 | error = gfs2_change_nlink(dip, -1); | |
1019 | if (error) | |
1020 | return error; | |
1021 | ||
71b86f56 | 1022 | gfs2_str2qstr(&dotname, "."); |
b3b94faa DT |
1023 | error = gfs2_dir_del(ip, &dotname); |
1024 | if (error) | |
1025 | return error; | |
1026 | ||
feaa7bba | 1027 | gfs2_str2qstr(&dotname, ".."); |
b3b94faa DT |
1028 | error = gfs2_dir_del(ip, &dotname); |
1029 | if (error) | |
1030 | return error; | |
1031 | ||
1032 | error = gfs2_change_nlink(ip, -2); | |
1033 | if (error) | |
1034 | return error; | |
1035 | ||
b3b94faa DT |
1036 | return error; |
1037 | } | |
1038 | ||
1039 | /* | |
1040 | * gfs2_unlink_ok - check to see that a inode is still in a directory | |
1041 | * @dip: the directory | |
1042 | * @name: the name of the file | |
1043 | * @ip: the inode | |
1044 | * | |
1045 | * Assumes that the lock on (at least) @dip is held. | |
1046 | * | |
1047 | * Returns: 0 if the parent/child relationship is correct, errno if it isn't | |
1048 | */ | |
1049 | ||
feaa7bba | 1050 | int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name, |
b3b94faa DT |
1051 | struct gfs2_inode *ip) |
1052 | { | |
629a21e7 | 1053 | struct gfs2_inum_host inum; |
b3b94faa DT |
1054 | unsigned int type; |
1055 | int error; | |
1056 | ||
feaa7bba | 1057 | if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode)) |
b3b94faa DT |
1058 | return -EPERM; |
1059 | ||
1060 | if ((dip->i_di.di_mode & S_ISVTX) && | |
1061 | dip->i_di.di_uid != current->fsuid && | |
feaa7bba | 1062 | ip->i_di.di_uid != current->fsuid && !capable(CAP_FOWNER)) |
b3b94faa DT |
1063 | return -EPERM; |
1064 | ||
feaa7bba | 1065 | if (IS_APPEND(&dip->i_inode)) |
b3b94faa DT |
1066 | return -EPERM; |
1067 | ||
faf450ef | 1068 | error = permission(&dip->i_inode, MAY_WRITE | MAY_EXEC, NULL); |
b3b94faa DT |
1069 | if (error) |
1070 | return error; | |
1071 | ||
feaa7bba | 1072 | error = gfs2_dir_search(&dip->i_inode, name, &inum, &type); |
b3b94faa DT |
1073 | if (error) |
1074 | return error; | |
1075 | ||
1076 | if (!gfs2_inum_equal(&inum, &ip->i_num)) | |
1077 | return -ENOENT; | |
1078 | ||
1079 | if (IF2DT(ip->i_di.di_mode) != type) { | |
1080 | gfs2_consist_inode(dip); | |
1081 | return -EIO; | |
1082 | } | |
1083 | ||
1084 | return 0; | |
1085 | } | |
1086 | ||
1087 | /* | |
1088 | * gfs2_ok_to_move - check if it's ok to move a directory to another directory | |
1089 | * @this: move this | |
1090 | * @to: to here | |
1091 | * | |
1092 | * Follow @to back to the root and make sure we don't encounter @this | |
1093 | * Assumes we already hold the rename lock. | |
1094 | * | |
1095 | * Returns: errno | |
1096 | */ | |
1097 | ||
1098 | int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to) | |
1099 | { | |
feaa7bba | 1100 | struct inode *dir = &to->i_inode; |
c9fd4307 | 1101 | struct super_block *sb = dir->i_sb; |
7359a19c | 1102 | struct inode *tmp; |
b3b94faa DT |
1103 | struct qstr dotdot; |
1104 | int error = 0; | |
1105 | ||
71b86f56 | 1106 | gfs2_str2qstr(&dotdot, ".."); |
b3b94faa | 1107 | |
7359a19c | 1108 | igrab(dir); |
b3b94faa DT |
1109 | |
1110 | for (;;) { | |
feaa7bba | 1111 | if (dir == &this->i_inode) { |
b3b94faa DT |
1112 | error = -EINVAL; |
1113 | break; | |
1114 | } | |
c9fd4307 | 1115 | if (dir == sb->s_root->d_inode) { |
b3b94faa DT |
1116 | error = 0; |
1117 | break; | |
1118 | } | |
1119 | ||
c752666c SW |
1120 | tmp = gfs2_lookupi(dir, &dotdot, 1, NULL); |
1121 | if (IS_ERR(tmp)) { | |
1122 | error = PTR_ERR(tmp); | |
b3b94faa | 1123 | break; |
c752666c | 1124 | } |
b3b94faa | 1125 | |
7359a19c SW |
1126 | iput(dir); |
1127 | dir = tmp; | |
b3b94faa DT |
1128 | } |
1129 | ||
7359a19c | 1130 | iput(dir); |
b3b94faa DT |
1131 | |
1132 | return error; | |
1133 | } | |
1134 | ||
1135 | /** | |
1136 | * gfs2_readlinki - return the contents of a symlink | |
1137 | * @ip: the symlink's inode | |
1138 | * @buf: a pointer to the buffer to be filled | |
1139 | * @len: a pointer to the length of @buf | |
1140 | * | |
1141 | * If @buf is too small, a piece of memory is kmalloc()ed and needs | |
1142 | * to be freed by the caller. | |
1143 | * | |
1144 | * Returns: errno | |
1145 | */ | |
1146 | ||
1147 | int gfs2_readlinki(struct gfs2_inode *ip, char **buf, unsigned int *len) | |
1148 | { | |
1149 | struct gfs2_holder i_gh; | |
1150 | struct buffer_head *dibh; | |
1151 | unsigned int x; | |
1152 | int error; | |
1153 | ||
1154 | gfs2_holder_init(ip->i_gl, LM_ST_SHARED, GL_ATIME, &i_gh); | |
1155 | error = gfs2_glock_nq_atime(&i_gh); | |
1156 | if (error) { | |
1157 | gfs2_holder_uninit(&i_gh); | |
1158 | return error; | |
1159 | } | |
1160 | ||
1161 | if (!ip->i_di.di_size) { | |
1162 | gfs2_consist_inode(ip); | |
1163 | error = -EIO; | |
1164 | goto out; | |
1165 | } | |
1166 | ||
1167 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1168 | if (error) | |
1169 | goto out; | |
1170 | ||
1171 | x = ip->i_di.di_size + 1; | |
1172 | if (x > *len) { | |
1173 | *buf = kmalloc(x, GFP_KERNEL); | |
1174 | if (!*buf) { | |
1175 | error = -ENOMEM; | |
1176 | goto out_brelse; | |
1177 | } | |
1178 | } | |
1179 | ||
1180 | memcpy(*buf, dibh->b_data + sizeof(struct gfs2_dinode), x); | |
1181 | *len = x; | |
1182 | ||
feaa7bba | 1183 | out_brelse: |
b3b94faa | 1184 | brelse(dibh); |
feaa7bba | 1185 | out: |
b3b94faa | 1186 | gfs2_glock_dq_uninit(&i_gh); |
b3b94faa DT |
1187 | return error; |
1188 | } | |
1189 | ||
1190 | /** | |
1191 | * gfs2_glock_nq_atime - Acquire a hold on an inode's glock, and | |
1192 | * conditionally update the inode's atime | |
1193 | * @gh: the holder to acquire | |
1194 | * | |
1195 | * Tests atime (access time) for gfs2_read, gfs2_readdir and gfs2_mmap | |
1196 | * Update if the difference between the current time and the inode's current | |
1197 | * atime is greater than an interval specified at mount. | |
1198 | * | |
1199 | * Returns: errno | |
1200 | */ | |
1201 | ||
1202 | int gfs2_glock_nq_atime(struct gfs2_holder *gh) | |
1203 | { | |
1204 | struct gfs2_glock *gl = gh->gh_gl; | |
1205 | struct gfs2_sbd *sdp = gl->gl_sbd; | |
5c676f6d | 1206 | struct gfs2_inode *ip = gl->gl_object; |
cd915493 | 1207 | s64 curtime, quantum = gfs2_tune_get(sdp, gt_atime_quantum); |
b3b94faa DT |
1208 | unsigned int state; |
1209 | int flags; | |
1210 | int error; | |
1211 | ||
1212 | if (gfs2_assert_warn(sdp, gh->gh_flags & GL_ATIME) || | |
1213 | gfs2_assert_warn(sdp, !(gh->gh_flags & GL_ASYNC)) || | |
1214 | gfs2_assert_warn(sdp, gl->gl_ops == &gfs2_inode_glops)) | |
1215 | return -EINVAL; | |
1216 | ||
1217 | state = gh->gh_state; | |
1218 | flags = gh->gh_flags; | |
1219 | ||
1220 | error = gfs2_glock_nq(gh); | |
1221 | if (error) | |
1222 | return error; | |
1223 | ||
1224 | if (test_bit(SDF_NOATIME, &sdp->sd_flags) || | |
1225 | (sdp->sd_vfs->s_flags & MS_RDONLY)) | |
1226 | return 0; | |
1227 | ||
1228 | curtime = get_seconds(); | |
1229 | if (curtime - ip->i_di.di_atime >= quantum) { | |
1230 | gfs2_glock_dq(gh); | |
fd88de56 SW |
1231 | gfs2_holder_reinit(LM_ST_EXCLUSIVE, gh->gh_flags & ~LM_FLAG_ANY, |
1232 | gh); | |
b3b94faa DT |
1233 | error = gfs2_glock_nq(gh); |
1234 | if (error) | |
1235 | return error; | |
1236 | ||
1237 | /* Verify that atime hasn't been updated while we were | |
1238 | trying to get exclusive lock. */ | |
1239 | ||
1240 | curtime = get_seconds(); | |
1241 | if (curtime - ip->i_di.di_atime >= quantum) { | |
1242 | struct buffer_head *dibh; | |
48516ced | 1243 | struct gfs2_dinode *di; |
b3b94faa DT |
1244 | |
1245 | error = gfs2_trans_begin(sdp, RES_DINODE, 0); | |
1246 | if (error == -EROFS) | |
1247 | return 0; | |
1248 | if (error) | |
1249 | goto fail; | |
1250 | ||
1251 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1252 | if (error) | |
1253 | goto fail_end_trans; | |
1254 | ||
1255 | ip->i_di.di_atime = curtime; | |
1256 | ||
d4e9c4c3 | 1257 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
48516ced SW |
1258 | di = (struct gfs2_dinode *)dibh->b_data; |
1259 | di->di_atime = cpu_to_be64(ip->i_di.di_atime); | |
b3b94faa DT |
1260 | brelse(dibh); |
1261 | ||
1262 | gfs2_trans_end(sdp); | |
1263 | } | |
1264 | ||
1265 | /* If someone else has asked for the glock, | |
1266 | unlock and let them have it. Then reacquire | |
1267 | in the original state. */ | |
1268 | if (gfs2_glock_is_blocking(gl)) { | |
1269 | gfs2_glock_dq(gh); | |
1270 | gfs2_holder_reinit(state, flags, gh); | |
1271 | return gfs2_glock_nq(gh); | |
1272 | } | |
1273 | } | |
1274 | ||
1275 | return 0; | |
1276 | ||
feaa7bba | 1277 | fail_end_trans: |
b3b94faa | 1278 | gfs2_trans_end(sdp); |
feaa7bba | 1279 | fail: |
b3b94faa | 1280 | gfs2_glock_dq(gh); |
b3b94faa DT |
1281 | return error; |
1282 | } | |
1283 | ||
1284 | /** | |
1285 | * glock_compare_atime - Compare two struct gfs2_glock structures for sort | |
1286 | * @arg_a: the first structure | |
1287 | * @arg_b: the second structure | |
1288 | * | |
1289 | * Returns: 1 if A > B | |
1290 | * -1 if A < B | |
75d3b817 | 1291 | * 0 if A == B |
b3b94faa DT |
1292 | */ |
1293 | ||
1294 | static int glock_compare_atime(const void *arg_a, const void *arg_b) | |
1295 | { | |
75d3b817 SW |
1296 | const struct gfs2_holder *gh_a = *(const struct gfs2_holder **)arg_a; |
1297 | const struct gfs2_holder *gh_b = *(const struct gfs2_holder **)arg_b; | |
1298 | const struct lm_lockname *a = &gh_a->gh_gl->gl_name; | |
1299 | const struct lm_lockname *b = &gh_b->gh_gl->gl_name; | |
b3b94faa DT |
1300 | |
1301 | if (a->ln_number > b->ln_number) | |
75d3b817 SW |
1302 | return 1; |
1303 | if (a->ln_number < b->ln_number) | |
1304 | return -1; | |
1305 | if (gh_a->gh_state == LM_ST_SHARED && gh_b->gh_state == LM_ST_EXCLUSIVE) | |
1306 | return 1; | |
1307 | if (gh_a->gh_state == LM_ST_SHARED && (gh_b->gh_flags & GL_ATIME)) | |
1308 | return 1; | |
b3b94faa | 1309 | |
75d3b817 | 1310 | return 0; |
b3b94faa DT |
1311 | } |
1312 | ||
1313 | /** | |
1314 | * gfs2_glock_nq_m_atime - acquire multiple glocks where one may need an | |
1315 | * atime update | |
1316 | * @num_gh: the number of structures | |
1317 | * @ghs: an array of struct gfs2_holder structures | |
1318 | * | |
1319 | * Returns: 0 on success (all glocks acquired), | |
1320 | * errno on failure (no glocks acquired) | |
1321 | */ | |
1322 | ||
1323 | int gfs2_glock_nq_m_atime(unsigned int num_gh, struct gfs2_holder *ghs) | |
1324 | { | |
1325 | struct gfs2_holder **p; | |
1326 | unsigned int x; | |
1327 | int error = 0; | |
1328 | ||
1329 | if (!num_gh) | |
1330 | return 0; | |
1331 | ||
1332 | if (num_gh == 1) { | |
1333 | ghs->gh_flags &= ~(LM_FLAG_TRY | GL_ASYNC); | |
1334 | if (ghs->gh_flags & GL_ATIME) | |
1335 | error = gfs2_glock_nq_atime(ghs); | |
1336 | else | |
1337 | error = gfs2_glock_nq(ghs); | |
1338 | return error; | |
1339 | } | |
1340 | ||
1341 | p = kcalloc(num_gh, sizeof(struct gfs2_holder *), GFP_KERNEL); | |
1342 | if (!p) | |
1343 | return -ENOMEM; | |
1344 | ||
1345 | for (x = 0; x < num_gh; x++) | |
1346 | p[x] = &ghs[x]; | |
1347 | ||
1348 | sort(p, num_gh, sizeof(struct gfs2_holder *), glock_compare_atime,NULL); | |
1349 | ||
1350 | for (x = 0; x < num_gh; x++) { | |
1351 | p[x]->gh_flags &= ~(LM_FLAG_TRY | GL_ASYNC); | |
1352 | ||
1353 | if (p[x]->gh_flags & GL_ATIME) | |
1354 | error = gfs2_glock_nq_atime(p[x]); | |
1355 | else | |
1356 | error = gfs2_glock_nq(p[x]); | |
1357 | ||
1358 | if (error) { | |
1359 | while (x--) | |
1360 | gfs2_glock_dq(p[x]); | |
1361 | break; | |
1362 | } | |
1363 | } | |
1364 | ||
1365 | kfree(p); | |
b3b94faa DT |
1366 | return error; |
1367 | } | |
1368 | ||
b3b94faa DT |
1369 | |
1370 | static int | |
1371 | __gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr) | |
1372 | { | |
1373 | struct buffer_head *dibh; | |
1374 | int error; | |
1375 | ||
1376 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1377 | if (!error) { | |
feaa7bba SW |
1378 | error = inode_setattr(&ip->i_inode, attr); |
1379 | gfs2_assert_warn(GFS2_SB(&ip->i_inode), !error); | |
b3b94faa DT |
1380 | gfs2_inode_attr_out(ip); |
1381 | ||
d4e9c4c3 | 1382 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
539e5d6b | 1383 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa DT |
1384 | brelse(dibh); |
1385 | } | |
1386 | return error; | |
1387 | } | |
1388 | ||
1389 | /** | |
1390 | * gfs2_setattr_simple - | |
1391 | * @ip: | |
1392 | * @attr: | |
1393 | * | |
1394 | * Called with a reference on the vnode. | |
1395 | * | |
1396 | * Returns: errno | |
1397 | */ | |
1398 | ||
1399 | int gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr) | |
1400 | { | |
1401 | int error; | |
1402 | ||
5c676f6d | 1403 | if (current->journal_info) |
b3b94faa DT |
1404 | return __gfs2_setattr_simple(ip, attr); |
1405 | ||
feaa7bba | 1406 | error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE, 0); |
b3b94faa DT |
1407 | if (error) |
1408 | return error; | |
1409 | ||
1410 | error = __gfs2_setattr_simple(ip, attr); | |
feaa7bba | 1411 | gfs2_trans_end(GFS2_SB(&ip->i_inode)); |
b3b94faa DT |
1412 | return error; |
1413 | } | |
1414 |