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; | |
c2668711 SW |
54 | i_size_write(inode, di->di_size); |
55 | inode->i_atime.tv_sec = di->di_atime; | |
56 | inode->i_mtime.tv_sec = di->di_mtime; | |
57 | inode->i_ctime.tv_sec = di->di_ctime; | |
b3b94faa DT |
58 | inode->i_atime.tv_nsec = 0; |
59 | inode->i_mtime.tv_nsec = 0; | |
60 | inode->i_ctime.tv_nsec = 0; | |
c2668711 | 61 | inode->i_blocks = di->di_blocks << |
feaa7bba | 62 | (GFS2_SB(inode)->sd_sb.sb_bsize_shift - GFS2_BASIC_BLOCK_SHIFT); |
b3b94faa | 63 | |
c2668711 | 64 | if (di->di_flags & GFS2_DIF_IMMUTABLE) |
b3b94faa DT |
65 | inode->i_flags |= S_IMMUTABLE; |
66 | else | |
67 | inode->i_flags &= ~S_IMMUTABLE; | |
68 | ||
c2668711 | 69 | if (di->di_flags & GFS2_DIF_APPENDONLY) |
b3b94faa DT |
70 | inode->i_flags |= S_APPEND; |
71 | else | |
72 | inode->i_flags &= ~S_APPEND; | |
73 | } | |
74 | ||
b3b94faa DT |
75 | /** |
76 | * gfs2_inode_attr_out - Copy attributes from VFS inode into the dinode | |
77 | * @ip: The GFS2 inode | |
78 | * | |
79 | * Only copy out the attributes that we want the VFS layer | |
80 | * to be able to modify. | |
81 | */ | |
82 | ||
83 | void gfs2_inode_attr_out(struct gfs2_inode *ip) | |
84 | { | |
feaa7bba | 85 | struct inode *inode = &ip->i_inode; |
3ca68df6 | 86 | struct gfs2_dinode_host *di = &ip->i_di; |
75d3b817 SW |
87 | di->di_atime = inode->i_atime.tv_sec; |
88 | di->di_mtime = inode->i_mtime.tv_sec; | |
89 | di->di_ctime = inode->i_ctime.tv_sec; | |
b3b94faa DT |
90 | } |
91 | ||
feaa7bba SW |
92 | static int iget_test(struct inode *inode, void *opaque) |
93 | { | |
94 | struct gfs2_inode *ip = GFS2_I(inode); | |
629a21e7 | 95 | struct gfs2_inum_host *inum = opaque; |
feaa7bba SW |
96 | |
97 | if (ip && ip->i_num.no_addr == inum->no_addr) | |
98 | return 1; | |
b3b94faa | 99 | |
feaa7bba SW |
100 | return 0; |
101 | } | |
102 | ||
103 | static int iget_set(struct inode *inode, void *opaque) | |
b3b94faa | 104 | { |
feaa7bba | 105 | struct gfs2_inode *ip = GFS2_I(inode); |
629a21e7 | 106 | struct gfs2_inum_host *inum = opaque; |
b3b94faa | 107 | |
feaa7bba SW |
108 | ip->i_num = *inum; |
109 | return 0; | |
110 | } | |
b3b94faa | 111 | |
629a21e7 | 112 | struct inode *gfs2_ilookup(struct super_block *sb, struct gfs2_inum_host *inum) |
feaa7bba SW |
113 | { |
114 | return ilookup5(sb, (unsigned long)inum->no_formal_ino, | |
115 | iget_test, inum); | |
116 | } | |
b3b94faa | 117 | |
629a21e7 | 118 | static struct inode *gfs2_iget(struct super_block *sb, struct gfs2_inum_host *inum) |
feaa7bba SW |
119 | { |
120 | return iget5_locked(sb, (unsigned long)inum->no_formal_ino, | |
121 | iget_test, iget_set, inum); | |
b3b94faa DT |
122 | } |
123 | ||
124 | /** | |
feaa7bba SW |
125 | * gfs2_inode_lookup - Lookup an inode |
126 | * @sb: The super block | |
127 | * @inum: The inode number | |
128 | * @type: The type of the inode | |
b3b94faa | 129 | * |
feaa7bba | 130 | * Returns: A VFS inode, or an error |
b3b94faa DT |
131 | */ |
132 | ||
629a21e7 | 133 | struct inode *gfs2_inode_lookup(struct super_block *sb, struct gfs2_inum_host *inum, unsigned int type) |
b3b94faa | 134 | { |
feaa7bba SW |
135 | struct inode *inode = gfs2_iget(sb, inum); |
136 | struct gfs2_inode *ip = GFS2_I(inode); | |
137 | struct gfs2_glock *io_gl; | |
138 | int error; | |
b3b94faa | 139 | |
26d83ded SW |
140 | if (!inode) |
141 | return ERR_PTR(-ENOBUFS); | |
142 | ||
feaa7bba SW |
143 | if (inode->i_state & I_NEW) { |
144 | struct gfs2_sbd *sdp = GFS2_SB(inode); | |
145 | umode_t mode = DT2IF(type); | |
bba9dfd8 | 146 | inode->i_private = ip; |
feaa7bba SW |
147 | inode->i_mode = mode; |
148 | ||
149 | if (S_ISREG(mode)) { | |
150 | inode->i_op = &gfs2_file_iops; | |
151 | inode->i_fop = &gfs2_file_fops; | |
152 | inode->i_mapping->a_ops = &gfs2_file_aops; | |
153 | } else if (S_ISDIR(mode)) { | |
154 | inode->i_op = &gfs2_dir_iops; | |
155 | inode->i_fop = &gfs2_dir_fops; | |
156 | } else if (S_ISLNK(mode)) { | |
157 | inode->i_op = &gfs2_symlink_iops; | |
158 | } else { | |
159 | inode->i_op = &gfs2_dev_iops; | |
b3b94faa | 160 | } |
b3b94faa | 161 | |
feaa7bba SW |
162 | error = gfs2_glock_get(sdp, inum->no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl); |
163 | if (unlikely(error)) | |
164 | goto fail; | |
165 | ip->i_gl->gl_object = ip; | |
b3b94faa | 166 | |
feaa7bba SW |
167 | error = gfs2_glock_get(sdp, inum->no_addr, &gfs2_iopen_glops, CREATE, &io_gl); |
168 | if (unlikely(error)) | |
169 | goto fail_put; | |
b3b94faa | 170 | |
feaa7bba SW |
171 | ip->i_vn = ip->i_gl->gl_vn - 1; |
172 | error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh); | |
173 | if (unlikely(error)) | |
174 | goto fail_iopen; | |
b3b94faa | 175 | |
feaa7bba SW |
176 | gfs2_glock_put(io_gl); |
177 | unlock_new_inode(inode); | |
178 | } | |
b3b94faa DT |
179 | |
180 | return inode; | |
feaa7bba SW |
181 | fail_iopen: |
182 | gfs2_glock_put(io_gl); | |
183 | fail_put: | |
184 | ip->i_gl->gl_object = NULL; | |
185 | gfs2_glock_put(ip->i_gl); | |
186 | fail: | |
187 | iput(inode); | |
188 | return ERR_PTR(error); | |
b3b94faa DT |
189 | } |
190 | ||
af339c02 | 191 | static int gfs2_dinode_in(struct gfs2_inode *ip, const void *buf) |
ea744d01 SW |
192 | { |
193 | struct gfs2_dinode_host *di = &ip->i_di; | |
194 | const struct gfs2_dinode *str = buf; | |
195 | ||
af339c02 SW |
196 | if (ip->i_num.no_addr != be64_to_cpu(str->di_num.no_addr)) { |
197 | if (gfs2_consist_inode(ip)) | |
198 | gfs2_dinode_print(ip); | |
199 | return -EIO; | |
200 | } | |
201 | if (ip->i_num.no_formal_ino != be64_to_cpu(str->di_num.no_formal_ino)) | |
202 | return -ESTALE; | |
ea744d01 | 203 | |
b60623c2 | 204 | ip->i_inode.i_mode = be32_to_cpu(str->di_mode); |
e7f14f4d | 205 | ip->i_inode.i_rdev = 0; |
b60623c2 | 206 | switch (ip->i_inode.i_mode & S_IFMT) { |
e7f14f4d SW |
207 | case S_IFBLK: |
208 | case S_IFCHR: | |
209 | ip->i_inode.i_rdev = MKDEV(be32_to_cpu(str->di_major), | |
210 | be32_to_cpu(str->di_minor)); | |
211 | break; | |
212 | }; | |
213 | ||
2933f925 SW |
214 | ip->i_inode.i_uid = be32_to_cpu(str->di_uid); |
215 | ip->i_inode.i_gid = be32_to_cpu(str->di_gid); | |
4f56110a SW |
216 | /* |
217 | * We will need to review setting the nlink count here in the | |
218 | * light of the forthcoming ro bind mount work. This is a reminder | |
219 | * to do that. | |
220 | */ | |
221 | ip->i_inode.i_nlink = be32_to_cpu(str->di_nlink); | |
ea744d01 SW |
222 | di->di_size = be64_to_cpu(str->di_size); |
223 | di->di_blocks = be64_to_cpu(str->di_blocks); | |
224 | di->di_atime = be64_to_cpu(str->di_atime); | |
225 | di->di_mtime = be64_to_cpu(str->di_mtime); | |
226 | di->di_ctime = be64_to_cpu(str->di_ctime); | |
ea744d01 SW |
227 | |
228 | di->di_goal_meta = be64_to_cpu(str->di_goal_meta); | |
229 | di->di_goal_data = be64_to_cpu(str->di_goal_data); | |
230 | di->di_generation = be64_to_cpu(str->di_generation); | |
231 | ||
232 | di->di_flags = be32_to_cpu(str->di_flags); | |
233 | di->di_payload_format = be32_to_cpu(str->di_payload_format); | |
234 | di->di_height = be16_to_cpu(str->di_height); | |
235 | ||
236 | di->di_depth = be16_to_cpu(str->di_depth); | |
237 | di->di_entries = be32_to_cpu(str->di_entries); | |
238 | ||
239 | di->di_eattr = be64_to_cpu(str->di_eattr); | |
af339c02 | 240 | return 0; |
ea744d01 SW |
241 | } |
242 | ||
b3b94faa DT |
243 | /** |
244 | * gfs2_inode_refresh - Refresh the incore copy of the dinode | |
245 | * @ip: The GFS2 inode | |
246 | * | |
247 | * Returns: errno | |
248 | */ | |
249 | ||
250 | int gfs2_inode_refresh(struct gfs2_inode *ip) | |
251 | { | |
252 | struct buffer_head *dibh; | |
253 | int error; | |
254 | ||
255 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
256 | if (error) | |
257 | return error; | |
258 | ||
feaa7bba | 259 | if (gfs2_metatype_check(GFS2_SB(&ip->i_inode), dibh, GFS2_METATYPE_DI)) { |
b3b94faa DT |
260 | brelse(dibh); |
261 | return -EIO; | |
262 | } | |
263 | ||
af339c02 | 264 | error = gfs2_dinode_in(ip, dibh->b_data); |
b3b94faa | 265 | brelse(dibh); |
b3b94faa DT |
266 | ip->i_vn = ip->i_gl->gl_vn; |
267 | ||
af339c02 | 268 | return error; |
b3b94faa DT |
269 | } |
270 | ||
feaa7bba | 271 | int gfs2_dinode_dealloc(struct gfs2_inode *ip) |
b3b94faa | 272 | { |
feaa7bba | 273 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b3b94faa DT |
274 | struct gfs2_alloc *al; |
275 | struct gfs2_rgrpd *rgd; | |
276 | int error; | |
277 | ||
278 | if (ip->i_di.di_blocks != 1) { | |
279 | if (gfs2_consist_inode(ip)) | |
4cc14f0b | 280 | gfs2_dinode_print(ip); |
b3b94faa DT |
281 | return -EIO; |
282 | } | |
283 | ||
284 | al = gfs2_alloc_get(ip); | |
285 | ||
286 | error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE); | |
287 | if (error) | |
288 | goto out; | |
289 | ||
290 | error = gfs2_rindex_hold(sdp, &al->al_ri_gh); | |
291 | if (error) | |
292 | goto out_qs; | |
293 | ||
294 | rgd = gfs2_blk2rgrpd(sdp, ip->i_num.no_addr); | |
295 | if (!rgd) { | |
296 | gfs2_consist_inode(ip); | |
297 | error = -EIO; | |
298 | goto out_rindex_relse; | |
299 | } | |
300 | ||
301 | error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, | |
302 | &al->al_rgd_gh); | |
303 | if (error) | |
304 | goto out_rindex_relse; | |
305 | ||
420b9e5e | 306 | error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_STATFS + RES_QUOTA, 1); |
b3b94faa DT |
307 | if (error) |
308 | goto out_rg_gunlock; | |
309 | ||
310 | gfs2_trans_add_gl(ip->i_gl); | |
311 | ||
312 | gfs2_free_di(rgd, ip); | |
313 | ||
b3b94faa DT |
314 | gfs2_trans_end(sdp); |
315 | clear_bit(GLF_STICKY, &ip->i_gl->gl_flags); | |
316 | ||
feaa7bba | 317 | out_rg_gunlock: |
b3b94faa | 318 | gfs2_glock_dq_uninit(&al->al_rgd_gh); |
feaa7bba | 319 | out_rindex_relse: |
b3b94faa | 320 | gfs2_glock_dq_uninit(&al->al_ri_gh); |
feaa7bba | 321 | out_qs: |
b3b94faa | 322 | gfs2_quota_unhold(ip); |
36327521 | 323 | out: |
feaa7bba | 324 | gfs2_alloc_put(ip); |
b3b94faa DT |
325 | return error; |
326 | } | |
327 | ||
b3b94faa DT |
328 | /** |
329 | * gfs2_change_nlink - Change nlink count on inode | |
330 | * @ip: The GFS2 inode | |
331 | * @diff: The change in the nlink count required | |
332 | * | |
333 | * Returns: errno | |
334 | */ | |
335 | ||
336 | int gfs2_change_nlink(struct gfs2_inode *ip, int diff) | |
337 | { | |
feaa7bba | 338 | struct gfs2_sbd *sdp = ip->i_inode.i_sb->s_fs_info; |
b3b94faa | 339 | struct buffer_head *dibh; |
cd915493 | 340 | u32 nlink; |
b3b94faa DT |
341 | int error; |
342 | ||
4f56110a SW |
343 | BUG_ON(diff != 1 && diff != -1); |
344 | nlink = ip->i_inode.i_nlink + diff; | |
b3b94faa DT |
345 | |
346 | /* If we are reducing the nlink count, but the new value ends up being | |
347 | bigger than the old one, we must have underflowed. */ | |
4f56110a | 348 | if (diff < 0 && nlink > ip->i_inode.i_nlink) { |
b3b94faa | 349 | if (gfs2_consist_inode(ip)) |
4cc14f0b | 350 | gfs2_dinode_print(ip); |
b3b94faa DT |
351 | return -EIO; |
352 | } | |
353 | ||
354 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
355 | if (error) | |
356 | return error; | |
357 | ||
4f56110a SW |
358 | if (diff > 0) |
359 | inc_nlink(&ip->i_inode); | |
360 | else | |
361 | drop_nlink(&ip->i_inode); | |
362 | ||
b3b94faa DT |
363 | ip->i_di.di_ctime = get_seconds(); |
364 | ||
d4e9c4c3 | 365 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
539e5d6b | 366 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa | 367 | brelse(dibh); |
feaa7bba | 368 | mark_inode_dirty(&ip->i_inode); |
b3b94faa | 369 | |
4f56110a | 370 | if (ip->i_inode.i_nlink == 0) { |
feaa7bba SW |
371 | struct gfs2_rgrpd *rgd; |
372 | struct gfs2_holder ri_gh, rg_gh; | |
373 | ||
374 | error = gfs2_rindex_hold(sdp, &ri_gh); | |
375 | if (error) | |
376 | goto out; | |
377 | error = -EIO; | |
378 | rgd = gfs2_blk2rgrpd(sdp, ip->i_num.no_addr); | |
379 | if (!rgd) | |
380 | goto out_norgrp; | |
381 | error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &rg_gh); | |
382 | if (error) | |
383 | goto out_norgrp; | |
384 | ||
385 | gfs2_unlink_di(&ip->i_inode); /* mark inode unlinked */ | |
386 | gfs2_glock_dq_uninit(&rg_gh); | |
387 | out_norgrp: | |
388 | gfs2_glock_dq_uninit(&ri_gh); | |
389 | } | |
390 | out: | |
391 | return error; | |
b3b94faa DT |
392 | } |
393 | ||
c752666c SW |
394 | struct inode *gfs2_lookup_simple(struct inode *dip, const char *name) |
395 | { | |
396 | struct qstr qstr; | |
71b86f56 | 397 | gfs2_str2qstr(&qstr, name); |
c752666c SW |
398 | return gfs2_lookupi(dip, &qstr, 1, NULL); |
399 | } | |
400 | ||
401 | ||
b3b94faa DT |
402 | /** |
403 | * gfs2_lookupi - Look up a filename in a directory and return its inode | |
404 | * @d_gh: An initialized holder for the directory glock | |
405 | * @name: The name of the inode to look for | |
406 | * @is_root: If 1, ignore the caller's permissions | |
407 | * @i_gh: An uninitialized holder for the new inode glock | |
408 | * | |
409 | * There will always be a vnode (Linux VFS inode) for the d_gh inode unless | |
410 | * @is_root is true. | |
411 | * | |
412 | * Returns: errno | |
413 | */ | |
414 | ||
feaa7bba SW |
415 | struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name, |
416 | int is_root, struct nameidata *nd) | |
b3b94faa | 417 | { |
c9fd4307 | 418 | struct super_block *sb = dir->i_sb; |
feaa7bba | 419 | struct gfs2_inode *dip = GFS2_I(dir); |
b3b94faa | 420 | struct gfs2_holder d_gh; |
629a21e7 | 421 | struct gfs2_inum_host inum; |
b3b94faa | 422 | unsigned int type; |
7359a19c | 423 | int error = 0; |
c752666c | 424 | struct inode *inode = NULL; |
b3b94faa DT |
425 | |
426 | if (!name->len || name->len > GFS2_FNAMESIZE) | |
c752666c | 427 | return ERR_PTR(-ENAMETOOLONG); |
b3b94faa | 428 | |
c752666c SW |
429 | if ((name->len == 1 && memcmp(name->name, ".", 1) == 0) || |
430 | (name->len == 2 && memcmp(name->name, "..", 2) == 0 && | |
431 | dir == sb->s_root->d_inode)) { | |
320dd101 SW |
432 | igrab(dir); |
433 | return dir; | |
b3b94faa DT |
434 | } |
435 | ||
436 | error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh); | |
437 | if (error) | |
c752666c | 438 | return ERR_PTR(error); |
b3b94faa DT |
439 | |
440 | if (!is_root) { | |
faf450ef | 441 | error = permission(dir, MAY_EXEC, NULL); |
b3b94faa DT |
442 | if (error) |
443 | goto out; | |
444 | } | |
445 | ||
c752666c | 446 | error = gfs2_dir_search(dir, name, &inum, &type); |
b3b94faa DT |
447 | if (error) |
448 | goto out; | |
449 | ||
feaa7bba | 450 | inode = gfs2_inode_lookup(sb, &inum, type); |
b3b94faa | 451 | |
7359a19c | 452 | out: |
b3b94faa | 453 | gfs2_glock_dq_uninit(&d_gh); |
c752666c SW |
454 | if (error == -ENOENT) |
455 | return NULL; | |
feaa7bba | 456 | return inode; |
b3b94faa DT |
457 | } |
458 | ||
cd915493 | 459 | static int pick_formal_ino_1(struct gfs2_sbd *sdp, u64 *formal_ino) |
b3b94faa | 460 | { |
feaa7bba | 461 | struct gfs2_inode *ip = GFS2_I(sdp->sd_ir_inode); |
b3b94faa | 462 | struct buffer_head *bh; |
e6972647 | 463 | struct gfs2_inum_range_host ir; |
b3b94faa DT |
464 | int error; |
465 | ||
466 | error = gfs2_trans_begin(sdp, RES_DINODE, 0); | |
467 | if (error) | |
468 | return error; | |
f55ab26a | 469 | mutex_lock(&sdp->sd_inum_mutex); |
b3b94faa DT |
470 | |
471 | error = gfs2_meta_inode_buffer(ip, &bh); | |
472 | if (error) { | |
f55ab26a | 473 | mutex_unlock(&sdp->sd_inum_mutex); |
b3b94faa DT |
474 | gfs2_trans_end(sdp); |
475 | return error; | |
476 | } | |
477 | ||
478 | gfs2_inum_range_in(&ir, bh->b_data + sizeof(struct gfs2_dinode)); | |
479 | ||
480 | if (ir.ir_length) { | |
481 | *formal_ino = ir.ir_start++; | |
482 | ir.ir_length--; | |
d4e9c4c3 | 483 | gfs2_trans_add_bh(ip->i_gl, bh, 1); |
b3b94faa DT |
484 | gfs2_inum_range_out(&ir, |
485 | bh->b_data + sizeof(struct gfs2_dinode)); | |
486 | brelse(bh); | |
f55ab26a | 487 | mutex_unlock(&sdp->sd_inum_mutex); |
b3b94faa DT |
488 | gfs2_trans_end(sdp); |
489 | return 0; | |
490 | } | |
491 | ||
492 | brelse(bh); | |
493 | ||
f55ab26a | 494 | mutex_unlock(&sdp->sd_inum_mutex); |
b3b94faa DT |
495 | gfs2_trans_end(sdp); |
496 | ||
497 | return 1; | |
498 | } | |
499 | ||
cd915493 | 500 | static int pick_formal_ino_2(struct gfs2_sbd *sdp, u64 *formal_ino) |
b3b94faa | 501 | { |
feaa7bba SW |
502 | struct gfs2_inode *ip = GFS2_I(sdp->sd_ir_inode); |
503 | struct gfs2_inode *m_ip = GFS2_I(sdp->sd_inum_inode); | |
b3b94faa DT |
504 | struct gfs2_holder gh; |
505 | struct buffer_head *bh; | |
e6972647 | 506 | struct gfs2_inum_range_host ir; |
b3b94faa DT |
507 | int error; |
508 | ||
509 | error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); | |
510 | if (error) | |
511 | return error; | |
512 | ||
513 | error = gfs2_trans_begin(sdp, 2 * RES_DINODE, 0); | |
514 | if (error) | |
515 | goto out; | |
f55ab26a | 516 | mutex_lock(&sdp->sd_inum_mutex); |
b3b94faa DT |
517 | |
518 | error = gfs2_meta_inode_buffer(ip, &bh); | |
519 | if (error) | |
520 | goto out_end_trans; | |
907b9bce | 521 | |
b3b94faa DT |
522 | gfs2_inum_range_in(&ir, bh->b_data + sizeof(struct gfs2_dinode)); |
523 | ||
524 | if (!ir.ir_length) { | |
525 | struct buffer_head *m_bh; | |
cd915493 | 526 | u64 x, y; |
b44b84d7 | 527 | __be64 z; |
b3b94faa DT |
528 | |
529 | error = gfs2_meta_inode_buffer(m_ip, &m_bh); | |
530 | if (error) | |
531 | goto out_brelse; | |
532 | ||
b44b84d7 AV |
533 | z = *(__be64 *)(m_bh->b_data + sizeof(struct gfs2_dinode)); |
534 | x = y = be64_to_cpu(z); | |
b3b94faa DT |
535 | ir.ir_start = x; |
536 | ir.ir_length = GFS2_INUM_QUANTUM; | |
537 | x += GFS2_INUM_QUANTUM; | |
538 | if (x < y) | |
539 | gfs2_consist_inode(m_ip); | |
b44b84d7 | 540 | z = cpu_to_be64(x); |
d4e9c4c3 | 541 | gfs2_trans_add_bh(m_ip->i_gl, m_bh, 1); |
b44b84d7 | 542 | *(__be64 *)(m_bh->b_data + sizeof(struct gfs2_dinode)) = z; |
b3b94faa DT |
543 | |
544 | brelse(m_bh); | |
545 | } | |
546 | ||
547 | *formal_ino = ir.ir_start++; | |
548 | ir.ir_length--; | |
549 | ||
d4e9c4c3 | 550 | gfs2_trans_add_bh(ip->i_gl, bh, 1); |
b3b94faa DT |
551 | gfs2_inum_range_out(&ir, bh->b_data + sizeof(struct gfs2_dinode)); |
552 | ||
420b9e5e | 553 | out_brelse: |
b3b94faa | 554 | brelse(bh); |
420b9e5e | 555 | out_end_trans: |
f55ab26a | 556 | mutex_unlock(&sdp->sd_inum_mutex); |
b3b94faa | 557 | gfs2_trans_end(sdp); |
420b9e5e | 558 | out: |
b3b94faa | 559 | gfs2_glock_dq_uninit(&gh); |
b3b94faa DT |
560 | return error; |
561 | } | |
562 | ||
cd915493 | 563 | static int pick_formal_ino(struct gfs2_sbd *sdp, u64 *inum) |
b3b94faa DT |
564 | { |
565 | int error; | |
566 | ||
567 | error = pick_formal_ino_1(sdp, inum); | |
568 | if (error <= 0) | |
569 | return error; | |
570 | ||
571 | error = pick_formal_ino_2(sdp, inum); | |
572 | ||
573 | return error; | |
574 | } | |
575 | ||
576 | /** | |
577 | * create_ok - OK to create a new on-disk inode here? | |
578 | * @dip: Directory in which dinode is to be created | |
579 | * @name: Name of new dinode | |
580 | * @mode: | |
581 | * | |
582 | * Returns: errno | |
583 | */ | |
584 | ||
feaa7bba | 585 | static int create_ok(struct gfs2_inode *dip, const struct qstr *name, |
b3b94faa DT |
586 | unsigned int mode) |
587 | { | |
588 | int error; | |
589 | ||
faf450ef | 590 | error = permission(&dip->i_inode, MAY_WRITE | MAY_EXEC, NULL); |
b3b94faa DT |
591 | if (error) |
592 | return error; | |
593 | ||
594 | /* Don't create entries in an unlinked directory */ | |
4f56110a | 595 | if (!dip->i_inode.i_nlink) |
b3b94faa DT |
596 | return -EPERM; |
597 | ||
feaa7bba | 598 | error = gfs2_dir_search(&dip->i_inode, name, NULL, NULL); |
b3b94faa DT |
599 | switch (error) { |
600 | case -ENOENT: | |
601 | error = 0; | |
602 | break; | |
603 | case 0: | |
604 | return -EEXIST; | |
605 | default: | |
606 | return error; | |
607 | } | |
608 | ||
cd915493 | 609 | if (dip->i_di.di_entries == (u32)-1) |
b3b94faa | 610 | return -EFBIG; |
4f56110a | 611 | if (S_ISDIR(mode) && dip->i_inode.i_nlink == (u32)-1) |
b3b94faa DT |
612 | return -EMLINK; |
613 | ||
614 | return 0; | |
615 | } | |
616 | ||
617 | static void munge_mode_uid_gid(struct gfs2_inode *dip, unsigned int *mode, | |
618 | unsigned int *uid, unsigned int *gid) | |
619 | { | |
feaa7bba | 620 | if (GFS2_SB(&dip->i_inode)->sd_args.ar_suiddir && |
2933f925 | 621 | (dip->i_inode.i_mode & S_ISUID) && dip->i_inode.i_uid) { |
b3b94faa DT |
622 | if (S_ISDIR(*mode)) |
623 | *mode |= S_ISUID; | |
2933f925 | 624 | else if (dip->i_inode.i_uid != current->fsuid) |
b3b94faa | 625 | *mode &= ~07111; |
2933f925 | 626 | *uid = dip->i_inode.i_uid; |
b3b94faa DT |
627 | } else |
628 | *uid = current->fsuid; | |
629 | ||
b60623c2 | 630 | if (dip->i_inode.i_mode & S_ISGID) { |
b3b94faa DT |
631 | if (S_ISDIR(*mode)) |
632 | *mode |= S_ISGID; | |
2933f925 | 633 | *gid = dip->i_inode.i_gid; |
b3b94faa DT |
634 | } else |
635 | *gid = current->fsgid; | |
636 | } | |
637 | ||
629a21e7 | 638 | static int alloc_dinode(struct gfs2_inode *dip, struct gfs2_inum_host *inum, |
4340fe62 | 639 | u64 *generation) |
b3b94faa | 640 | { |
feaa7bba | 641 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); |
b3b94faa DT |
642 | int error; |
643 | ||
644 | gfs2_alloc_get(dip); | |
645 | ||
646 | dip->i_alloc.al_requested = RES_DINODE; | |
647 | error = gfs2_inplace_reserve(dip); | |
648 | if (error) | |
649 | goto out; | |
650 | ||
feaa7bba | 651 | error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_STATFS, 0); |
b3b94faa DT |
652 | if (error) |
653 | goto out_ipreserv; | |
654 | ||
4340fe62 | 655 | inum->no_addr = gfs2_alloc_di(dip, generation); |
b3b94faa DT |
656 | |
657 | gfs2_trans_end(sdp); | |
658 | ||
4340fe62 | 659 | out_ipreserv: |
b3b94faa | 660 | gfs2_inplace_release(dip); |
4340fe62 | 661 | out: |
b3b94faa | 662 | gfs2_alloc_put(dip); |
b3b94faa DT |
663 | return error; |
664 | } | |
665 | ||
666 | /** | |
667 | * init_dinode - Fill in a new dinode structure | |
668 | * @dip: the directory this inode is being created in | |
669 | * @gl: The glock covering the new inode | |
670 | * @inum: the inode number | |
671 | * @mode: the file permissions | |
672 | * @uid: | |
673 | * @gid: | |
674 | * | |
675 | */ | |
676 | ||
677 | static void init_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl, | |
629a21e7 | 678 | const struct gfs2_inum_host *inum, unsigned int mode, |
4340fe62 | 679 | unsigned int uid, unsigned int gid, |
e7f14f4d | 680 | const u64 *generation, dev_t dev) |
b3b94faa | 681 | { |
feaa7bba | 682 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); |
b96ca4fa | 683 | struct gfs2_dinode *di; |
b3b94faa DT |
684 | struct buffer_head *dibh; |
685 | ||
686 | dibh = gfs2_meta_new(gl, inum->no_addr); | |
d4e9c4c3 | 687 | gfs2_trans_add_bh(gl, dibh, 1); |
b3b94faa DT |
688 | gfs2_metatype_set(dibh, GFS2_METATYPE_DI, GFS2_FORMAT_DI); |
689 | gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode)); | |
b96ca4fa SW |
690 | di = (struct gfs2_dinode *)dibh->b_data; |
691 | ||
2442a098 SW |
692 | di->di_num.no_formal_ino = cpu_to_be64(inum->no_formal_ino); |
693 | di->di_num.no_addr = cpu_to_be64(inum->no_addr); | |
b96ca4fa SW |
694 | di->di_mode = cpu_to_be32(mode); |
695 | di->di_uid = cpu_to_be32(uid); | |
696 | di->di_gid = cpu_to_be32(gid); | |
697 | di->di_nlink = cpu_to_be32(0); | |
698 | di->di_size = cpu_to_be64(0); | |
699 | di->di_blocks = cpu_to_be64(1); | |
700 | di->di_atime = di->di_mtime = di->di_ctime = cpu_to_be64(get_seconds()); | |
e7f14f4d SW |
701 | di->di_major = cpu_to_be32(MAJOR(dev)); |
702 | di->di_minor = cpu_to_be32(MINOR(dev)); | |
b96ca4fa | 703 | di->di_goal_meta = di->di_goal_data = cpu_to_be64(inum->no_addr); |
4340fe62 | 704 | di->di_generation = cpu_to_be64(*generation); |
b96ca4fa | 705 | di->di_flags = cpu_to_be32(0); |
b3b94faa DT |
706 | |
707 | if (S_ISREG(mode)) { | |
708 | if ((dip->i_di.di_flags & GFS2_DIF_INHERIT_JDATA) || | |
709 | gfs2_tune_get(sdp, gt_new_files_jdata)) | |
b96ca4fa | 710 | di->di_flags |= cpu_to_be32(GFS2_DIF_JDATA); |
b3b94faa DT |
711 | if ((dip->i_di.di_flags & GFS2_DIF_INHERIT_DIRECTIO) || |
712 | gfs2_tune_get(sdp, gt_new_files_directio)) | |
b96ca4fa | 713 | di->di_flags |= cpu_to_be32(GFS2_DIF_DIRECTIO); |
b3b94faa | 714 | } else if (S_ISDIR(mode)) { |
568f4c96 SW |
715 | di->di_flags |= cpu_to_be32(dip->i_di.di_flags & |
716 | GFS2_DIF_INHERIT_DIRECTIO); | |
717 | di->di_flags |= cpu_to_be32(dip->i_di.di_flags & | |
718 | GFS2_DIF_INHERIT_JDATA); | |
b3b94faa DT |
719 | } |
720 | ||
b96ca4fa | 721 | di->__pad1 = 0; |
b2a580d8 | 722 | di->di_payload_format = cpu_to_be32(0); |
b96ca4fa SW |
723 | di->di_height = cpu_to_be32(0); |
724 | di->__pad2 = 0; | |
725 | di->__pad3 = 0; | |
726 | di->di_depth = cpu_to_be16(0); | |
727 | di->di_entries = cpu_to_be32(0); | |
728 | memset(&di->__pad4, 0, sizeof(di->__pad4)); | |
729 | di->di_eattr = cpu_to_be64(0); | |
730 | memset(&di->di_reserved, 0, sizeof(di->di_reserved)); | |
731 | ||
b3b94faa DT |
732 | brelse(dibh); |
733 | } | |
734 | ||
735 | static int make_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl, | |
629a21e7 | 736 | unsigned int mode, const struct gfs2_inum_host *inum, |
e7f14f4d | 737 | const u64 *generation, dev_t dev) |
b3b94faa | 738 | { |
feaa7bba | 739 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); |
b3b94faa DT |
740 | unsigned int uid, gid; |
741 | int error; | |
742 | ||
743 | munge_mode_uid_gid(dip, &mode, &uid, &gid); | |
b3b94faa DT |
744 | gfs2_alloc_get(dip); |
745 | ||
746 | error = gfs2_quota_lock(dip, uid, gid); | |
747 | if (error) | |
748 | goto out; | |
749 | ||
750 | error = gfs2_quota_check(dip, uid, gid); | |
751 | if (error) | |
752 | goto out_quota; | |
753 | ||
feaa7bba | 754 | error = gfs2_trans_begin(sdp, RES_DINODE + RES_QUOTA, 0); |
b3b94faa DT |
755 | if (error) |
756 | goto out_quota; | |
757 | ||
e7f14f4d | 758 | init_dinode(dip, gl, inum, mode, uid, gid, generation, dev); |
b3b94faa | 759 | gfs2_quota_change(dip, +1, uid, gid); |
b3b94faa DT |
760 | gfs2_trans_end(sdp); |
761 | ||
feaa7bba | 762 | out_quota: |
b3b94faa | 763 | gfs2_quota_unlock(dip); |
feaa7bba | 764 | out: |
b3b94faa | 765 | gfs2_alloc_put(dip); |
b3b94faa DT |
766 | return error; |
767 | } | |
768 | ||
feaa7bba SW |
769 | static int link_dinode(struct gfs2_inode *dip, const struct qstr *name, |
770 | struct gfs2_inode *ip) | |
b3b94faa | 771 | { |
feaa7bba | 772 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); |
b3b94faa DT |
773 | struct gfs2_alloc *al; |
774 | int alloc_required; | |
775 | struct buffer_head *dibh; | |
776 | int error; | |
777 | ||
778 | al = gfs2_alloc_get(dip); | |
779 | ||
780 | error = gfs2_quota_lock(dip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE); | |
781 | if (error) | |
782 | goto fail; | |
783 | ||
feaa7bba | 784 | error = alloc_required = gfs2_diradd_alloc_required(&dip->i_inode, name); |
c752666c SW |
785 | if (alloc_required < 0) |
786 | goto fail; | |
b3b94faa | 787 | if (alloc_required) { |
2933f925 | 788 | error = gfs2_quota_check(dip, dip->i_inode.i_uid, dip->i_inode.i_gid); |
b3b94faa DT |
789 | if (error) |
790 | goto fail_quota_locks; | |
791 | ||
792 | al->al_requested = sdp->sd_max_dirres; | |
793 | ||
794 | error = gfs2_inplace_reserve(dip); | |
795 | if (error) | |
796 | goto fail_quota_locks; | |
797 | ||
320dd101 | 798 | error = gfs2_trans_begin(sdp, sdp->sd_max_dirres + |
b3b94faa | 799 | al->al_rgd->rd_ri.ri_length + |
907b9bce | 800 | 2 * RES_DINODE + |
b3b94faa DT |
801 | RES_STATFS + RES_QUOTA, 0); |
802 | if (error) | |
803 | goto fail_ipreserv; | |
804 | } else { | |
feaa7bba | 805 | error = gfs2_trans_begin(sdp, RES_LEAF + 2 * RES_DINODE, 0); |
b3b94faa DT |
806 | if (error) |
807 | goto fail_quota_locks; | |
808 | } | |
809 | ||
b60623c2 | 810 | error = gfs2_dir_add(&dip->i_inode, name, &ip->i_num, IF2DT(ip->i_inode.i_mode)); |
b3b94faa DT |
811 | if (error) |
812 | goto fail_end_trans; | |
813 | ||
814 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
815 | if (error) | |
816 | goto fail_end_trans; | |
4f56110a | 817 | ip->i_inode.i_nlink = 1; |
d4e9c4c3 | 818 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
539e5d6b | 819 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa | 820 | brelse(dibh); |
b3b94faa DT |
821 | return 0; |
822 | ||
320dd101 | 823 | fail_end_trans: |
b3b94faa DT |
824 | gfs2_trans_end(sdp); |
825 | ||
320dd101 | 826 | fail_ipreserv: |
b3b94faa DT |
827 | if (dip->i_alloc.al_rgd) |
828 | gfs2_inplace_release(dip); | |
829 | ||
320dd101 | 830 | fail_quota_locks: |
b3b94faa DT |
831 | gfs2_quota_unlock(dip); |
832 | ||
320dd101 | 833 | fail: |
b3b94faa | 834 | gfs2_alloc_put(dip); |
b3b94faa DT |
835 | return error; |
836 | } | |
837 | ||
fcb47e0b RH |
838 | static int gfs2_security_init(struct gfs2_inode *dip, struct gfs2_inode *ip) |
839 | { | |
840 | int err; | |
841 | size_t len; | |
842 | void *value; | |
843 | char *name; | |
844 | struct gfs2_ea_request er; | |
845 | ||
846 | err = security_inode_init_security(&ip->i_inode, &dip->i_inode, | |
847 | &name, &value, &len); | |
848 | ||
849 | if (err) { | |
850 | if (err == -EOPNOTSUPP) | |
851 | return 0; | |
852 | return err; | |
853 | } | |
854 | ||
855 | memset(&er, 0, sizeof(struct gfs2_ea_request)); | |
856 | ||
857 | er.er_type = GFS2_EATYPE_SECURITY; | |
858 | er.er_name = name; | |
859 | er.er_data = value; | |
860 | er.er_name_len = strlen(name); | |
861 | er.er_data_len = len; | |
862 | ||
863 | err = gfs2_ea_set_i(ip, &er); | |
864 | ||
865 | kfree(value); | |
866 | kfree(name); | |
867 | ||
868 | return err; | |
869 | } | |
870 | ||
b3b94faa DT |
871 | /** |
872 | * gfs2_createi - Create a new inode | |
873 | * @ghs: An array of two holders | |
874 | * @name: The name of the new file | |
875 | * @mode: the permissions on the new inode | |
876 | * | |
877 | * @ghs[0] is an initialized holder for the directory | |
878 | * @ghs[1] is the holder for the inode lock | |
879 | * | |
7359a19c | 880 | * If the return value is not NULL, the glocks on both the directory and the new |
b3b94faa DT |
881 | * file are held. A transaction has been started and an inplace reservation |
882 | * is held, as well. | |
883 | * | |
7359a19c | 884 | * Returns: An inode |
b3b94faa DT |
885 | */ |
886 | ||
feaa7bba | 887 | struct inode *gfs2_createi(struct gfs2_holder *ghs, const struct qstr *name, |
e7f14f4d | 888 | unsigned int mode, dev_t dev) |
b3b94faa | 889 | { |
7359a19c | 890 | struct inode *inode; |
5c676f6d | 891 | struct gfs2_inode *dip = ghs->gh_gl->gl_object; |
feaa7bba SW |
892 | struct inode *dir = &dip->i_inode; |
893 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); | |
629a21e7 | 894 | struct gfs2_inum_host inum; |
b3b94faa | 895 | int error; |
4340fe62 | 896 | u64 generation; |
b3b94faa DT |
897 | |
898 | if (!name->len || name->len > GFS2_FNAMESIZE) | |
7359a19c | 899 | return ERR_PTR(-ENAMETOOLONG); |
b3b94faa | 900 | |
b3b94faa DT |
901 | gfs2_holder_reinit(LM_ST_EXCLUSIVE, 0, ghs); |
902 | error = gfs2_glock_nq(ghs); | |
903 | if (error) | |
904 | goto fail; | |
905 | ||
906 | error = create_ok(dip, name, mode); | |
907 | if (error) | |
908 | goto fail_gunlock; | |
909 | ||
feaa7bba | 910 | error = pick_formal_ino(sdp, &inum.no_formal_ino); |
b3b94faa DT |
911 | if (error) |
912 | goto fail_gunlock; | |
913 | ||
4340fe62 | 914 | error = alloc_dinode(dip, &inum, &generation); |
b3b94faa DT |
915 | if (error) |
916 | goto fail_gunlock; | |
917 | ||
feaa7bba | 918 | if (inum.no_addr < dip->i_num.no_addr) { |
b3b94faa DT |
919 | gfs2_glock_dq(ghs); |
920 | ||
feaa7bba | 921 | error = gfs2_glock_nq_num(sdp, inum.no_addr, |
320dd101 SW |
922 | &gfs2_inode_glops, LM_ST_EXCLUSIVE, |
923 | GL_SKIP, ghs + 1); | |
b3b94faa | 924 | if (error) { |
7359a19c | 925 | return ERR_PTR(error); |
b3b94faa DT |
926 | } |
927 | ||
928 | gfs2_holder_reinit(LM_ST_EXCLUSIVE, 0, ghs); | |
929 | error = gfs2_glock_nq(ghs); | |
930 | if (error) { | |
931 | gfs2_glock_dq_uninit(ghs + 1); | |
7359a19c | 932 | return ERR_PTR(error); |
b3b94faa DT |
933 | } |
934 | ||
935 | error = create_ok(dip, name, mode); | |
936 | if (error) | |
937 | goto fail_gunlock2; | |
938 | } else { | |
feaa7bba | 939 | error = gfs2_glock_nq_num(sdp, inum.no_addr, |
320dd101 SW |
940 | &gfs2_inode_glops, LM_ST_EXCLUSIVE, |
941 | GL_SKIP, ghs + 1); | |
b3b94faa DT |
942 | if (error) |
943 | goto fail_gunlock; | |
944 | } | |
945 | ||
e7f14f4d | 946 | error = make_dinode(dip, ghs[1].gh_gl, mode, &inum, &generation, dev); |
b3b94faa DT |
947 | if (error) |
948 | goto fail_gunlock2; | |
949 | ||
feaa7bba SW |
950 | inode = gfs2_inode_lookup(dir->i_sb, &inum, IF2DT(mode)); |
951 | if (IS_ERR(inode)) | |
b3b94faa DT |
952 | goto fail_gunlock2; |
953 | ||
feaa7bba | 954 | error = gfs2_inode_refresh(GFS2_I(inode)); |
b3b94faa DT |
955 | if (error) |
956 | goto fail_iput; | |
957 | ||
feaa7bba | 958 | error = gfs2_acl_create(dip, GFS2_I(inode)); |
b3b94faa DT |
959 | if (error) |
960 | goto fail_iput; | |
961 | ||
fcb47e0b RH |
962 | error = gfs2_security_init(dip, GFS2_I(inode)); |
963 | if (error) | |
964 | goto fail_iput; | |
965 | ||
feaa7bba | 966 | error = link_dinode(dip, name, GFS2_I(inode)); |
b3b94faa DT |
967 | if (error) |
968 | goto fail_iput; | |
969 | ||
7359a19c SW |
970 | if (!inode) |
971 | return ERR_PTR(-ENOMEM); | |
972 | return inode; | |
b3b94faa | 973 | |
320dd101 | 974 | fail_iput: |
feaa7bba | 975 | iput(inode); |
320dd101 | 976 | fail_gunlock2: |
b3b94faa | 977 | gfs2_glock_dq_uninit(ghs + 1); |
320dd101 | 978 | fail_gunlock: |
b3b94faa | 979 | gfs2_glock_dq(ghs); |
320dd101 | 980 | fail: |
7359a19c | 981 | return ERR_PTR(error); |
b3b94faa DT |
982 | } |
983 | ||
b3b94faa DT |
984 | /** |
985 | * gfs2_rmdiri - Remove a directory | |
986 | * @dip: The parent directory of the directory to be removed | |
987 | * @name: The name of the directory to be removed | |
988 | * @ip: The GFS2 inode of the directory to be removed | |
989 | * | |
990 | * Assumes Glocks on dip and ip are held | |
991 | * | |
992 | * Returns: errno | |
993 | */ | |
994 | ||
feaa7bba SW |
995 | int gfs2_rmdiri(struct gfs2_inode *dip, const struct qstr *name, |
996 | struct gfs2_inode *ip) | |
b3b94faa | 997 | { |
b3b94faa DT |
998 | struct qstr dotname; |
999 | int error; | |
1000 | ||
1001 | if (ip->i_di.di_entries != 2) { | |
1002 | if (gfs2_consist_inode(ip)) | |
4cc14f0b | 1003 | gfs2_dinode_print(ip); |
b3b94faa DT |
1004 | return -EIO; |
1005 | } | |
1006 | ||
1007 | error = gfs2_dir_del(dip, name); | |
1008 | if (error) | |
1009 | return error; | |
1010 | ||
1011 | error = gfs2_change_nlink(dip, -1); | |
1012 | if (error) | |
1013 | return error; | |
1014 | ||
71b86f56 | 1015 | gfs2_str2qstr(&dotname, "."); |
b3b94faa DT |
1016 | error = gfs2_dir_del(ip, &dotname); |
1017 | if (error) | |
1018 | return error; | |
1019 | ||
feaa7bba | 1020 | gfs2_str2qstr(&dotname, ".."); |
b3b94faa DT |
1021 | error = gfs2_dir_del(ip, &dotname); |
1022 | if (error) | |
1023 | return error; | |
1024 | ||
4f56110a SW |
1025 | /* It looks odd, but it really should be done twice */ |
1026 | error = gfs2_change_nlink(ip, -1); | |
1027 | if (error) | |
1028 | return error; | |
1029 | ||
1030 | error = gfs2_change_nlink(ip, -1); | |
b3b94faa DT |
1031 | if (error) |
1032 | return error; | |
1033 | ||
b3b94faa DT |
1034 | return error; |
1035 | } | |
1036 | ||
1037 | /* | |
1038 | * gfs2_unlink_ok - check to see that a inode is still in a directory | |
1039 | * @dip: the directory | |
1040 | * @name: the name of the file | |
1041 | * @ip: the inode | |
1042 | * | |
1043 | * Assumes that the lock on (at least) @dip is held. | |
1044 | * | |
1045 | * Returns: 0 if the parent/child relationship is correct, errno if it isn't | |
1046 | */ | |
1047 | ||
feaa7bba | 1048 | int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name, |
b3b94faa DT |
1049 | struct gfs2_inode *ip) |
1050 | { | |
629a21e7 | 1051 | struct gfs2_inum_host inum; |
b3b94faa DT |
1052 | unsigned int type; |
1053 | int error; | |
1054 | ||
feaa7bba | 1055 | if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode)) |
b3b94faa DT |
1056 | return -EPERM; |
1057 | ||
b60623c2 | 1058 | if ((dip->i_inode.i_mode & S_ISVTX) && |
2933f925 SW |
1059 | dip->i_inode.i_uid != current->fsuid && |
1060 | ip->i_inode.i_uid != current->fsuid && !capable(CAP_FOWNER)) | |
b3b94faa DT |
1061 | return -EPERM; |
1062 | ||
feaa7bba | 1063 | if (IS_APPEND(&dip->i_inode)) |
b3b94faa DT |
1064 | return -EPERM; |
1065 | ||
faf450ef | 1066 | error = permission(&dip->i_inode, MAY_WRITE | MAY_EXEC, NULL); |
b3b94faa DT |
1067 | if (error) |
1068 | return error; | |
1069 | ||
feaa7bba | 1070 | error = gfs2_dir_search(&dip->i_inode, name, &inum, &type); |
b3b94faa DT |
1071 | if (error) |
1072 | return error; | |
1073 | ||
1074 | if (!gfs2_inum_equal(&inum, &ip->i_num)) | |
1075 | return -ENOENT; | |
1076 | ||
b60623c2 | 1077 | if (IF2DT(ip->i_inode.i_mode) != type) { |
b3b94faa DT |
1078 | gfs2_consist_inode(dip); |
1079 | return -EIO; | |
1080 | } | |
1081 | ||
1082 | return 0; | |
1083 | } | |
1084 | ||
1085 | /* | |
1086 | * gfs2_ok_to_move - check if it's ok to move a directory to another directory | |
1087 | * @this: move this | |
1088 | * @to: to here | |
1089 | * | |
1090 | * Follow @to back to the root and make sure we don't encounter @this | |
1091 | * Assumes we already hold the rename lock. | |
1092 | * | |
1093 | * Returns: errno | |
1094 | */ | |
1095 | ||
1096 | int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to) | |
1097 | { | |
feaa7bba | 1098 | struct inode *dir = &to->i_inode; |
c9fd4307 | 1099 | struct super_block *sb = dir->i_sb; |
7359a19c | 1100 | struct inode *tmp; |
b3b94faa DT |
1101 | struct qstr dotdot; |
1102 | int error = 0; | |
1103 | ||
71b86f56 | 1104 | gfs2_str2qstr(&dotdot, ".."); |
b3b94faa | 1105 | |
7359a19c | 1106 | igrab(dir); |
b3b94faa DT |
1107 | |
1108 | for (;;) { | |
feaa7bba | 1109 | if (dir == &this->i_inode) { |
b3b94faa DT |
1110 | error = -EINVAL; |
1111 | break; | |
1112 | } | |
c9fd4307 | 1113 | if (dir == sb->s_root->d_inode) { |
b3b94faa DT |
1114 | error = 0; |
1115 | break; | |
1116 | } | |
1117 | ||
c752666c SW |
1118 | tmp = gfs2_lookupi(dir, &dotdot, 1, NULL); |
1119 | if (IS_ERR(tmp)) { | |
1120 | error = PTR_ERR(tmp); | |
b3b94faa | 1121 | break; |
c752666c | 1122 | } |
b3b94faa | 1123 | |
7359a19c SW |
1124 | iput(dir); |
1125 | dir = tmp; | |
b3b94faa DT |
1126 | } |
1127 | ||
7359a19c | 1128 | iput(dir); |
b3b94faa DT |
1129 | |
1130 | return error; | |
1131 | } | |
1132 | ||
1133 | /** | |
1134 | * gfs2_readlinki - return the contents of a symlink | |
1135 | * @ip: the symlink's inode | |
1136 | * @buf: a pointer to the buffer to be filled | |
1137 | * @len: a pointer to the length of @buf | |
1138 | * | |
1139 | * If @buf is too small, a piece of memory is kmalloc()ed and needs | |
1140 | * to be freed by the caller. | |
1141 | * | |
1142 | * Returns: errno | |
1143 | */ | |
1144 | ||
1145 | int gfs2_readlinki(struct gfs2_inode *ip, char **buf, unsigned int *len) | |
1146 | { | |
1147 | struct gfs2_holder i_gh; | |
1148 | struct buffer_head *dibh; | |
1149 | unsigned int x; | |
1150 | int error; | |
1151 | ||
1152 | gfs2_holder_init(ip->i_gl, LM_ST_SHARED, GL_ATIME, &i_gh); | |
1153 | error = gfs2_glock_nq_atime(&i_gh); | |
1154 | if (error) { | |
1155 | gfs2_holder_uninit(&i_gh); | |
1156 | return error; | |
1157 | } | |
1158 | ||
1159 | if (!ip->i_di.di_size) { | |
1160 | gfs2_consist_inode(ip); | |
1161 | error = -EIO; | |
1162 | goto out; | |
1163 | } | |
1164 | ||
1165 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1166 | if (error) | |
1167 | goto out; | |
1168 | ||
1169 | x = ip->i_di.di_size + 1; | |
1170 | if (x > *len) { | |
1171 | *buf = kmalloc(x, GFP_KERNEL); | |
1172 | if (!*buf) { | |
1173 | error = -ENOMEM; | |
1174 | goto out_brelse; | |
1175 | } | |
1176 | } | |
1177 | ||
1178 | memcpy(*buf, dibh->b_data + sizeof(struct gfs2_dinode), x); | |
1179 | *len = x; | |
1180 | ||
feaa7bba | 1181 | out_brelse: |
b3b94faa | 1182 | brelse(dibh); |
feaa7bba | 1183 | out: |
b3b94faa | 1184 | gfs2_glock_dq_uninit(&i_gh); |
b3b94faa DT |
1185 | return error; |
1186 | } | |
1187 | ||
1188 | /** | |
1189 | * gfs2_glock_nq_atime - Acquire a hold on an inode's glock, and | |
1190 | * conditionally update the inode's atime | |
1191 | * @gh: the holder to acquire | |
1192 | * | |
1193 | * Tests atime (access time) for gfs2_read, gfs2_readdir and gfs2_mmap | |
1194 | * Update if the difference between the current time and the inode's current | |
1195 | * atime is greater than an interval specified at mount. | |
1196 | * | |
1197 | * Returns: errno | |
1198 | */ | |
1199 | ||
1200 | int gfs2_glock_nq_atime(struct gfs2_holder *gh) | |
1201 | { | |
1202 | struct gfs2_glock *gl = gh->gh_gl; | |
1203 | struct gfs2_sbd *sdp = gl->gl_sbd; | |
5c676f6d | 1204 | struct gfs2_inode *ip = gl->gl_object; |
cd915493 | 1205 | s64 curtime, quantum = gfs2_tune_get(sdp, gt_atime_quantum); |
b3b94faa DT |
1206 | unsigned int state; |
1207 | int flags; | |
1208 | int error; | |
1209 | ||
1210 | if (gfs2_assert_warn(sdp, gh->gh_flags & GL_ATIME) || | |
1211 | gfs2_assert_warn(sdp, !(gh->gh_flags & GL_ASYNC)) || | |
1212 | gfs2_assert_warn(sdp, gl->gl_ops == &gfs2_inode_glops)) | |
1213 | return -EINVAL; | |
1214 | ||
1215 | state = gh->gh_state; | |
1216 | flags = gh->gh_flags; | |
1217 | ||
1218 | error = gfs2_glock_nq(gh); | |
1219 | if (error) | |
1220 | return error; | |
1221 | ||
1222 | if (test_bit(SDF_NOATIME, &sdp->sd_flags) || | |
1223 | (sdp->sd_vfs->s_flags & MS_RDONLY)) | |
1224 | return 0; | |
1225 | ||
1226 | curtime = get_seconds(); | |
1227 | if (curtime - ip->i_di.di_atime >= quantum) { | |
1228 | gfs2_glock_dq(gh); | |
fd88de56 SW |
1229 | gfs2_holder_reinit(LM_ST_EXCLUSIVE, gh->gh_flags & ~LM_FLAG_ANY, |
1230 | gh); | |
b3b94faa DT |
1231 | error = gfs2_glock_nq(gh); |
1232 | if (error) | |
1233 | return error; | |
1234 | ||
1235 | /* Verify that atime hasn't been updated while we were | |
1236 | trying to get exclusive lock. */ | |
1237 | ||
1238 | curtime = get_seconds(); | |
1239 | if (curtime - ip->i_di.di_atime >= quantum) { | |
1240 | struct buffer_head *dibh; | |
48516ced | 1241 | struct gfs2_dinode *di; |
b3b94faa DT |
1242 | |
1243 | error = gfs2_trans_begin(sdp, RES_DINODE, 0); | |
1244 | if (error == -EROFS) | |
1245 | return 0; | |
1246 | if (error) | |
1247 | goto fail; | |
1248 | ||
1249 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1250 | if (error) | |
1251 | goto fail_end_trans; | |
1252 | ||
1253 | ip->i_di.di_atime = curtime; | |
1254 | ||
d4e9c4c3 | 1255 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
48516ced SW |
1256 | di = (struct gfs2_dinode *)dibh->b_data; |
1257 | di->di_atime = cpu_to_be64(ip->i_di.di_atime); | |
b3b94faa DT |
1258 | brelse(dibh); |
1259 | ||
1260 | gfs2_trans_end(sdp); | |
1261 | } | |
1262 | ||
1263 | /* If someone else has asked for the glock, | |
1264 | unlock and let them have it. Then reacquire | |
1265 | in the original state. */ | |
1266 | if (gfs2_glock_is_blocking(gl)) { | |
1267 | gfs2_glock_dq(gh); | |
1268 | gfs2_holder_reinit(state, flags, gh); | |
1269 | return gfs2_glock_nq(gh); | |
1270 | } | |
1271 | } | |
1272 | ||
1273 | return 0; | |
1274 | ||
feaa7bba | 1275 | fail_end_trans: |
b3b94faa | 1276 | gfs2_trans_end(sdp); |
feaa7bba | 1277 | fail: |
b3b94faa | 1278 | gfs2_glock_dq(gh); |
b3b94faa DT |
1279 | return error; |
1280 | } | |
1281 | ||
1282 | /** | |
1283 | * glock_compare_atime - Compare two struct gfs2_glock structures for sort | |
1284 | * @arg_a: the first structure | |
1285 | * @arg_b: the second structure | |
1286 | * | |
1287 | * Returns: 1 if A > B | |
1288 | * -1 if A < B | |
75d3b817 | 1289 | * 0 if A == B |
b3b94faa DT |
1290 | */ |
1291 | ||
1292 | static int glock_compare_atime(const void *arg_a, const void *arg_b) | |
1293 | { | |
75d3b817 SW |
1294 | const struct gfs2_holder *gh_a = *(const struct gfs2_holder **)arg_a; |
1295 | const struct gfs2_holder *gh_b = *(const struct gfs2_holder **)arg_b; | |
1296 | const struct lm_lockname *a = &gh_a->gh_gl->gl_name; | |
1297 | const struct lm_lockname *b = &gh_b->gh_gl->gl_name; | |
b3b94faa DT |
1298 | |
1299 | if (a->ln_number > b->ln_number) | |
75d3b817 SW |
1300 | return 1; |
1301 | if (a->ln_number < b->ln_number) | |
1302 | return -1; | |
1303 | if (gh_a->gh_state == LM_ST_SHARED && gh_b->gh_state == LM_ST_EXCLUSIVE) | |
1304 | return 1; | |
1305 | if (gh_a->gh_state == LM_ST_SHARED && (gh_b->gh_flags & GL_ATIME)) | |
1306 | return 1; | |
b3b94faa | 1307 | |
75d3b817 | 1308 | return 0; |
b3b94faa DT |
1309 | } |
1310 | ||
1311 | /** | |
1312 | * gfs2_glock_nq_m_atime - acquire multiple glocks where one may need an | |
1313 | * atime update | |
1314 | * @num_gh: the number of structures | |
1315 | * @ghs: an array of struct gfs2_holder structures | |
1316 | * | |
1317 | * Returns: 0 on success (all glocks acquired), | |
1318 | * errno on failure (no glocks acquired) | |
1319 | */ | |
1320 | ||
1321 | int gfs2_glock_nq_m_atime(unsigned int num_gh, struct gfs2_holder *ghs) | |
1322 | { | |
1323 | struct gfs2_holder **p; | |
1324 | unsigned int x; | |
1325 | int error = 0; | |
1326 | ||
1327 | if (!num_gh) | |
1328 | return 0; | |
1329 | ||
1330 | if (num_gh == 1) { | |
1331 | ghs->gh_flags &= ~(LM_FLAG_TRY | GL_ASYNC); | |
1332 | if (ghs->gh_flags & GL_ATIME) | |
1333 | error = gfs2_glock_nq_atime(ghs); | |
1334 | else | |
1335 | error = gfs2_glock_nq(ghs); | |
1336 | return error; | |
1337 | } | |
1338 | ||
1339 | p = kcalloc(num_gh, sizeof(struct gfs2_holder *), GFP_KERNEL); | |
1340 | if (!p) | |
1341 | return -ENOMEM; | |
1342 | ||
1343 | for (x = 0; x < num_gh; x++) | |
1344 | p[x] = &ghs[x]; | |
1345 | ||
1346 | sort(p, num_gh, sizeof(struct gfs2_holder *), glock_compare_atime,NULL); | |
1347 | ||
1348 | for (x = 0; x < num_gh; x++) { | |
1349 | p[x]->gh_flags &= ~(LM_FLAG_TRY | GL_ASYNC); | |
1350 | ||
1351 | if (p[x]->gh_flags & GL_ATIME) | |
1352 | error = gfs2_glock_nq_atime(p[x]); | |
1353 | else | |
1354 | error = gfs2_glock_nq(p[x]); | |
1355 | ||
1356 | if (error) { | |
1357 | while (x--) | |
1358 | gfs2_glock_dq(p[x]); | |
1359 | break; | |
1360 | } | |
1361 | } | |
1362 | ||
1363 | kfree(p); | |
b3b94faa DT |
1364 | return error; |
1365 | } | |
1366 | ||
b3b94faa DT |
1367 | |
1368 | static int | |
1369 | __gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr) | |
1370 | { | |
1371 | struct buffer_head *dibh; | |
1372 | int error; | |
1373 | ||
1374 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1375 | if (!error) { | |
feaa7bba SW |
1376 | error = inode_setattr(&ip->i_inode, attr); |
1377 | gfs2_assert_warn(GFS2_SB(&ip->i_inode), !error); | |
b3b94faa DT |
1378 | gfs2_inode_attr_out(ip); |
1379 | ||
d4e9c4c3 | 1380 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
539e5d6b | 1381 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa DT |
1382 | brelse(dibh); |
1383 | } | |
1384 | return error; | |
1385 | } | |
1386 | ||
1387 | /** | |
1388 | * gfs2_setattr_simple - | |
1389 | * @ip: | |
1390 | * @attr: | |
1391 | * | |
1392 | * Called with a reference on the vnode. | |
1393 | * | |
1394 | * Returns: errno | |
1395 | */ | |
1396 | ||
1397 | int gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr) | |
1398 | { | |
1399 | int error; | |
1400 | ||
5c676f6d | 1401 | if (current->journal_info) |
b3b94faa DT |
1402 | return __gfs2_setattr_simple(ip, attr); |
1403 | ||
feaa7bba | 1404 | error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE, 0); |
b3b94faa DT |
1405 | if (error) |
1406 | return error; | |
1407 | ||
1408 | error = __gfs2_setattr_simple(ip, attr); | |
feaa7bba | 1409 | gfs2_trans_end(GFS2_SB(&ip->i_inode)); |
b3b94faa DT |
1410 | return error; |
1411 | } | |
1412 |