Commit | Line | Data |
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b3b94faa DT |
1 | /* |
2 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. | |
f2741d98 | 3 | * Copyright (C) 2004-2011 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 | ||
b3b94faa DT |
10 | #include <linux/slab.h> |
11 | #include <linux/spinlock.h> | |
12 | #include <linux/completion.h> | |
13 | #include <linux/buffer_head.h> | |
14 | #include <linux/namei.h> | |
b3b94faa DT |
15 | #include <linux/mm.h> |
16 | #include <linux/xattr.h> | |
17 | #include <linux/posix_acl.h> | |
5c676f6d | 18 | #include <linux/gfs2_ondisk.h> |
71b86f56 | 19 | #include <linux/crc32.h> |
e9079cce | 20 | #include <linux/fiemap.h> |
194c011f | 21 | #include <linux/security.h> |
b3b94faa DT |
22 | #include <asm/uaccess.h> |
23 | ||
24 | #include "gfs2.h" | |
5c676f6d | 25 | #include "incore.h" |
b3b94faa DT |
26 | #include "acl.h" |
27 | #include "bmap.h" | |
28 | #include "dir.h" | |
307cf6e6 | 29 | #include "xattr.h" |
b3b94faa DT |
30 | #include "glock.h" |
31 | #include "inode.h" | |
32 | #include "meta_io.h" | |
b3b94faa DT |
33 | #include "quota.h" |
34 | #include "rgrp.h" | |
35 | #include "trans.h" | |
5c676f6d | 36 | #include "util.h" |
b2760583 | 37 | #include "super.h" |
194c011f SW |
38 | #include "glops.h" |
39 | ||
40 | struct gfs2_skip_data { | |
41 | u64 no_addr; | |
42 | int skipped; | |
43 | int non_block; | |
44 | }; | |
45 | ||
46 | static int iget_test(struct inode *inode, void *opaque) | |
47 | { | |
48 | struct gfs2_inode *ip = GFS2_I(inode); | |
49 | struct gfs2_skip_data *data = opaque; | |
50 | ||
51 | if (ip->i_no_addr == data->no_addr) { | |
52 | if (data->non_block && | |
53 | inode->i_state & (I_FREEING|I_CLEAR|I_WILL_FREE)) { | |
54 | data->skipped = 1; | |
55 | return 0; | |
56 | } | |
57 | return 1; | |
58 | } | |
59 | return 0; | |
60 | } | |
61 | ||
62 | static int iget_set(struct inode *inode, void *opaque) | |
63 | { | |
64 | struct gfs2_inode *ip = GFS2_I(inode); | |
65 | struct gfs2_skip_data *data = opaque; | |
66 | ||
67 | if (data->skipped) | |
68 | return -ENOENT; | |
69 | inode->i_ino = (unsigned long)(data->no_addr); | |
70 | ip->i_no_addr = data->no_addr; | |
71 | return 0; | |
72 | } | |
73 | ||
74 | struct inode *gfs2_ilookup(struct super_block *sb, u64 no_addr, int non_block) | |
75 | { | |
76 | unsigned long hash = (unsigned long)no_addr; | |
77 | struct gfs2_skip_data data; | |
78 | ||
79 | data.no_addr = no_addr; | |
80 | data.skipped = 0; | |
81 | data.non_block = non_block; | |
82 | return ilookup5(sb, hash, iget_test, &data); | |
83 | } | |
84 | ||
85 | static struct inode *gfs2_iget(struct super_block *sb, u64 no_addr, | |
86 | int non_block) | |
87 | { | |
88 | struct gfs2_skip_data data; | |
89 | unsigned long hash = (unsigned long)no_addr; | |
90 | ||
91 | data.no_addr = no_addr; | |
92 | data.skipped = 0; | |
93 | data.non_block = non_block; | |
94 | return iget5_locked(sb, hash, iget_test, iget_set, &data); | |
95 | } | |
96 | ||
97 | /** | |
98 | * gfs2_set_iop - Sets inode operations | |
99 | * @inode: The inode with correct i_mode filled in | |
100 | * | |
101 | * GFS2 lookup code fills in vfs inode contents based on info obtained | |
102 | * from directory entry inside gfs2_inode_lookup(). | |
103 | */ | |
104 | ||
105 | static void gfs2_set_iop(struct inode *inode) | |
106 | { | |
107 | struct gfs2_sbd *sdp = GFS2_SB(inode); | |
108 | umode_t mode = inode->i_mode; | |
109 | ||
110 | if (S_ISREG(mode)) { | |
111 | inode->i_op = &gfs2_file_iops; | |
112 | if (gfs2_localflocks(sdp)) | |
113 | inode->i_fop = &gfs2_file_fops_nolock; | |
114 | else | |
115 | inode->i_fop = &gfs2_file_fops; | |
116 | } else if (S_ISDIR(mode)) { | |
117 | inode->i_op = &gfs2_dir_iops; | |
118 | if (gfs2_localflocks(sdp)) | |
119 | inode->i_fop = &gfs2_dir_fops_nolock; | |
120 | else | |
121 | inode->i_fop = &gfs2_dir_fops; | |
122 | } else if (S_ISLNK(mode)) { | |
123 | inode->i_op = &gfs2_symlink_iops; | |
124 | } else { | |
125 | inode->i_op = &gfs2_file_iops; | |
126 | init_special_inode(inode, inode->i_mode, inode->i_rdev); | |
127 | } | |
128 | } | |
129 | ||
130 | /** | |
131 | * gfs2_inode_lookup - Lookup an inode | |
132 | * @sb: The super block | |
133 | * @no_addr: The inode number | |
134 | * @type: The type of the inode | |
135 | * non_block: Can we block on inodes that are being freed? | |
136 | * | |
137 | * Returns: A VFS inode, or an error | |
138 | */ | |
139 | ||
140 | struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned int type, | |
141 | u64 no_addr, u64 no_formal_ino, int non_block) | |
142 | { | |
143 | struct inode *inode; | |
144 | struct gfs2_inode *ip; | |
145 | struct gfs2_glock *io_gl = NULL; | |
146 | int error; | |
147 | ||
148 | inode = gfs2_iget(sb, no_addr, non_block); | |
149 | ip = GFS2_I(inode); | |
150 | ||
151 | if (!inode) | |
152 | return ERR_PTR(-ENOBUFS); | |
153 | ||
154 | if (inode->i_state & I_NEW) { | |
155 | struct gfs2_sbd *sdp = GFS2_SB(inode); | |
156 | ip->i_no_formal_ino = no_formal_ino; | |
157 | ||
158 | error = gfs2_glock_get(sdp, no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl); | |
159 | if (unlikely(error)) | |
160 | goto fail; | |
161 | ip->i_gl->gl_object = ip; | |
162 | ||
163 | error = gfs2_glock_get(sdp, no_addr, &gfs2_iopen_glops, CREATE, &io_gl); | |
164 | if (unlikely(error)) | |
165 | goto fail_put; | |
166 | ||
167 | set_bit(GIF_INVALID, &ip->i_flags); | |
168 | error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh); | |
169 | if (unlikely(error)) | |
170 | goto fail_iopen; | |
171 | ||
172 | ip->i_iopen_gh.gh_gl->gl_object = ip; | |
173 | gfs2_glock_put(io_gl); | |
174 | io_gl = NULL; | |
175 | ||
176 | if (type == DT_UNKNOWN) { | |
177 | /* Inode glock must be locked already */ | |
178 | error = gfs2_inode_refresh(GFS2_I(inode)); | |
179 | if (error) | |
180 | goto fail_refresh; | |
181 | } else { | |
182 | inode->i_mode = DT2IF(type); | |
183 | } | |
184 | ||
185 | gfs2_set_iop(inode); | |
186 | unlock_new_inode(inode); | |
187 | } | |
188 | ||
189 | return inode; | |
190 | ||
191 | fail_refresh: | |
192 | ip->i_iopen_gh.gh_gl->gl_object = NULL; | |
193 | gfs2_glock_dq_uninit(&ip->i_iopen_gh); | |
194 | fail_iopen: | |
195 | if (io_gl) | |
196 | gfs2_glock_put(io_gl); | |
197 | fail_put: | |
198 | ip->i_gl->gl_object = NULL; | |
199 | gfs2_glock_put(ip->i_gl); | |
200 | fail: | |
201 | iget_failed(inode); | |
202 | return ERR_PTR(error); | |
203 | } | |
204 | ||
205 | struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr, | |
206 | u64 *no_formal_ino, unsigned int blktype) | |
207 | { | |
208 | struct super_block *sb = sdp->sd_vfs; | |
209 | struct gfs2_holder i_gh; | |
210 | struct inode *inode = NULL; | |
211 | int error; | |
212 | ||
213 | /* Must not read in block until block type is verified */ | |
214 | error = gfs2_glock_nq_num(sdp, no_addr, &gfs2_inode_glops, | |
215 | LM_ST_EXCLUSIVE, GL_SKIP, &i_gh); | |
216 | if (error) | |
217 | return ERR_PTR(error); | |
218 | ||
219 | error = gfs2_check_blk_type(sdp, no_addr, blktype); | |
220 | if (error) | |
221 | goto fail; | |
222 | ||
223 | inode = gfs2_inode_lookup(sb, DT_UNKNOWN, no_addr, 0, 1); | |
224 | if (IS_ERR(inode)) | |
225 | goto fail; | |
226 | ||
227 | /* Two extra checks for NFS only */ | |
228 | if (no_formal_ino) { | |
229 | error = -ESTALE; | |
230 | if (GFS2_I(inode)->i_no_formal_ino != *no_formal_ino) | |
231 | goto fail_iput; | |
232 | ||
233 | error = -EIO; | |
234 | if (GFS2_I(inode)->i_diskflags & GFS2_DIF_SYSTEM) | |
235 | goto fail_iput; | |
236 | ||
237 | error = 0; | |
238 | } | |
239 | ||
240 | fail: | |
241 | gfs2_glock_dq_uninit(&i_gh); | |
242 | return error ? ERR_PTR(error) : inode; | |
243 | fail_iput: | |
244 | iput(inode); | |
245 | goto fail; | |
246 | } | |
247 | ||
248 | ||
249 | struct inode *gfs2_lookup_simple(struct inode *dip, const char *name) | |
250 | { | |
251 | struct qstr qstr; | |
252 | struct inode *inode; | |
253 | gfs2_str2qstr(&qstr, name); | |
254 | inode = gfs2_lookupi(dip, &qstr, 1); | |
255 | /* gfs2_lookupi has inconsistent callers: vfs | |
256 | * related routines expect NULL for no entry found, | |
257 | * gfs2_lookup_simple callers expect ENOENT | |
258 | * and do not check for NULL. | |
259 | */ | |
260 | if (inode == NULL) | |
261 | return ERR_PTR(-ENOENT); | |
262 | else | |
263 | return inode; | |
264 | } | |
265 | ||
266 | ||
267 | /** | |
268 | * gfs2_lookupi - Look up a filename in a directory and return its inode | |
269 | * @d_gh: An initialized holder for the directory glock | |
270 | * @name: The name of the inode to look for | |
271 | * @is_root: If 1, ignore the caller's permissions | |
272 | * @i_gh: An uninitialized holder for the new inode glock | |
273 | * | |
274 | * This can be called via the VFS filldir function when NFS is doing | |
275 | * a readdirplus and the inode which its intending to stat isn't | |
276 | * already in cache. In this case we must not take the directory glock | |
277 | * again, since the readdir call will have already taken that lock. | |
278 | * | |
279 | * Returns: errno | |
280 | */ | |
281 | ||
282 | struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name, | |
283 | int is_root) | |
284 | { | |
285 | struct super_block *sb = dir->i_sb; | |
286 | struct gfs2_inode *dip = GFS2_I(dir); | |
287 | struct gfs2_holder d_gh; | |
288 | int error = 0; | |
289 | struct inode *inode = NULL; | |
290 | int unlock = 0; | |
291 | ||
292 | if (!name->len || name->len > GFS2_FNAMESIZE) | |
293 | return ERR_PTR(-ENAMETOOLONG); | |
294 | ||
295 | if ((name->len == 1 && memcmp(name->name, ".", 1) == 0) || | |
296 | (name->len == 2 && memcmp(name->name, "..", 2) == 0 && | |
297 | dir == sb->s_root->d_inode)) { | |
298 | igrab(dir); | |
299 | return dir; | |
300 | } | |
301 | ||
302 | if (gfs2_glock_is_locked_by_me(dip->i_gl) == NULL) { | |
303 | error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh); | |
304 | if (error) | |
305 | return ERR_PTR(error); | |
306 | unlock = 1; | |
307 | } | |
308 | ||
309 | if (!is_root) { | |
10556cb2 | 310 | error = gfs2_permission(dir, MAY_EXEC); |
194c011f SW |
311 | if (error) |
312 | goto out; | |
313 | } | |
314 | ||
315 | inode = gfs2_dir_search(dir, name); | |
316 | if (IS_ERR(inode)) | |
317 | error = PTR_ERR(inode); | |
318 | out: | |
319 | if (unlock) | |
320 | gfs2_glock_dq_uninit(&d_gh); | |
321 | if (error == -ENOENT) | |
322 | return NULL; | |
323 | return inode ? inode : ERR_PTR(error); | |
324 | } | |
325 | ||
326 | /** | |
327 | * create_ok - OK to create a new on-disk inode here? | |
328 | * @dip: Directory in which dinode is to be created | |
329 | * @name: Name of new dinode | |
330 | * @mode: | |
331 | * | |
332 | * Returns: errno | |
333 | */ | |
334 | ||
335 | static int create_ok(struct gfs2_inode *dip, const struct qstr *name, | |
336 | unsigned int mode) | |
337 | { | |
338 | int error; | |
339 | ||
10556cb2 | 340 | error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC); |
194c011f SW |
341 | if (error) |
342 | return error; | |
343 | ||
344 | /* Don't create entries in an unlinked directory */ | |
345 | if (!dip->i_inode.i_nlink) | |
346 | return -ENOENT; | |
347 | ||
348 | error = gfs2_dir_check(&dip->i_inode, name, NULL); | |
349 | switch (error) { | |
350 | case -ENOENT: | |
351 | error = 0; | |
352 | break; | |
353 | case 0: | |
354 | return -EEXIST; | |
355 | default: | |
356 | return error; | |
357 | } | |
358 | ||
359 | if (dip->i_entries == (u32)-1) | |
360 | return -EFBIG; | |
361 | if (S_ISDIR(mode) && dip->i_inode.i_nlink == (u32)-1) | |
362 | return -EMLINK; | |
363 | ||
364 | return 0; | |
365 | } | |
366 | ||
367 | static void munge_mode_uid_gid(struct gfs2_inode *dip, unsigned int *mode, | |
368 | unsigned int *uid, unsigned int *gid) | |
369 | { | |
370 | if (GFS2_SB(&dip->i_inode)->sd_args.ar_suiddir && | |
371 | (dip->i_inode.i_mode & S_ISUID) && dip->i_inode.i_uid) { | |
372 | if (S_ISDIR(*mode)) | |
373 | *mode |= S_ISUID; | |
374 | else if (dip->i_inode.i_uid != current_fsuid()) | |
375 | *mode &= ~07111; | |
376 | *uid = dip->i_inode.i_uid; | |
377 | } else | |
378 | *uid = current_fsuid(); | |
379 | ||
380 | if (dip->i_inode.i_mode & S_ISGID) { | |
381 | if (S_ISDIR(*mode)) | |
382 | *mode |= S_ISGID; | |
383 | *gid = dip->i_inode.i_gid; | |
384 | } else | |
385 | *gid = current_fsgid(); | |
386 | } | |
387 | ||
388 | static int alloc_dinode(struct gfs2_inode *dip, u64 *no_addr, u64 *generation) | |
389 | { | |
390 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); | |
391 | int error; | |
392 | ||
393 | if (gfs2_alloc_get(dip) == NULL) | |
394 | return -ENOMEM; | |
395 | ||
396 | dip->i_alloc->al_requested = RES_DINODE; | |
397 | error = gfs2_inplace_reserve(dip); | |
398 | if (error) | |
399 | goto out; | |
400 | ||
401 | error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_STATFS, 0); | |
402 | if (error) | |
403 | goto out_ipreserv; | |
404 | ||
405 | error = gfs2_alloc_di(dip, no_addr, generation); | |
406 | ||
407 | gfs2_trans_end(sdp); | |
408 | ||
409 | out_ipreserv: | |
410 | gfs2_inplace_release(dip); | |
411 | out: | |
412 | gfs2_alloc_put(dip); | |
413 | return error; | |
414 | } | |
415 | ||
f2741d98 SW |
416 | static void gfs2_init_dir(struct buffer_head *dibh, |
417 | const struct gfs2_inode *parent) | |
e2d0a13b SW |
418 | { |
419 | struct gfs2_dinode *di = (struct gfs2_dinode *)dibh->b_data; | |
420 | struct gfs2_dirent *dent = (struct gfs2_dirent *)(di+1); | |
421 | ||
422 | gfs2_qstr2dirent(&gfs2_qdot, GFS2_DIRENT_SIZE(gfs2_qdot.len), dent); | |
423 | dent->de_inum = di->di_num; /* already GFS2 endian */ | |
424 | dent->de_type = cpu_to_be16(DT_DIR); | |
425 | ||
426 | dent = (struct gfs2_dirent *)((char*)dent + GFS2_DIRENT_SIZE(1)); | |
427 | gfs2_qstr2dirent(&gfs2_qdotdot, dibh->b_size - GFS2_DIRENT_SIZE(1) - sizeof(struct gfs2_dinode), dent); | |
428 | gfs2_inum_out(parent, dent); | |
429 | dent->de_type = cpu_to_be16(DT_DIR); | |
430 | ||
431 | } | |
432 | ||
194c011f SW |
433 | /** |
434 | * init_dinode - Fill in a new dinode structure | |
f2741d98 | 435 | * @dip: The directory this inode is being created in |
194c011f | 436 | * @gl: The glock covering the new inode |
f2741d98 SW |
437 | * @inum: The inode number |
438 | * @mode: The file permissions | |
439 | * @uid: The uid of the new inode | |
440 | * @gid: The gid of the new inode | |
441 | * @generation: The generation number of the new inode | |
442 | * @dev: The device number (if a device node) | |
443 | * @symname: The symlink destination (if a symlink) | |
444 | * @size: The inode size (ignored for directories) | |
445 | * @bhp: The buffer head (returned to caller) | |
194c011f SW |
446 | * |
447 | */ | |
448 | ||
449 | static void init_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl, | |
450 | const struct gfs2_inum_host *inum, unsigned int mode, | |
451 | unsigned int uid, unsigned int gid, | |
160b4026 SW |
452 | const u64 *generation, dev_t dev, const char *symname, |
453 | unsigned size, struct buffer_head **bhp) | |
194c011f SW |
454 | { |
455 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); | |
456 | struct gfs2_dinode *di; | |
457 | struct buffer_head *dibh; | |
458 | struct timespec tv = CURRENT_TIME; | |
459 | ||
460 | dibh = gfs2_meta_new(gl, inum->no_addr); | |
461 | gfs2_trans_add_bh(gl, dibh, 1); | |
462 | gfs2_metatype_set(dibh, GFS2_METATYPE_DI, GFS2_FORMAT_DI); | |
463 | gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode)); | |
464 | di = (struct gfs2_dinode *)dibh->b_data; | |
465 | ||
466 | di->di_num.no_formal_ino = cpu_to_be64(inum->no_formal_ino); | |
467 | di->di_num.no_addr = cpu_to_be64(inum->no_addr); | |
468 | di->di_mode = cpu_to_be32(mode); | |
469 | di->di_uid = cpu_to_be32(uid); | |
470 | di->di_gid = cpu_to_be32(gid); | |
471 | di->di_nlink = 0; | |
160b4026 | 472 | di->di_size = cpu_to_be64(size); |
194c011f SW |
473 | di->di_blocks = cpu_to_be64(1); |
474 | di->di_atime = di->di_mtime = di->di_ctime = cpu_to_be64(tv.tv_sec); | |
475 | di->di_major = cpu_to_be32(MAJOR(dev)); | |
476 | di->di_minor = cpu_to_be32(MINOR(dev)); | |
477 | di->di_goal_meta = di->di_goal_data = cpu_to_be64(inum->no_addr); | |
478 | di->di_generation = cpu_to_be64(*generation); | |
479 | di->di_flags = 0; | |
194c011f SW |
480 | di->__pad1 = 0; |
481 | di->di_payload_format = cpu_to_be32(S_ISDIR(mode) ? GFS2_FORMAT_DE : 0); | |
482 | di->di_height = 0; | |
483 | di->__pad2 = 0; | |
484 | di->__pad3 = 0; | |
485 | di->di_depth = 0; | |
486 | di->di_entries = 0; | |
487 | memset(&di->__pad4, 0, sizeof(di->__pad4)); | |
488 | di->di_eattr = 0; | |
489 | di->di_atime_nsec = cpu_to_be32(tv.tv_nsec); | |
490 | di->di_mtime_nsec = cpu_to_be32(tv.tv_nsec); | |
491 | di->di_ctime_nsec = cpu_to_be32(tv.tv_nsec); | |
492 | memset(&di->di_reserved, 0, sizeof(di->di_reserved)); | |
160b4026 SW |
493 | |
494 | switch(mode & S_IFMT) { | |
495 | case S_IFREG: | |
e2d0a13b SW |
496 | if ((dip->i_diskflags & GFS2_DIF_INHERIT_JDATA) || |
497 | gfs2_tune_get(sdp, gt_new_files_jdata)) | |
498 | di->di_flags |= cpu_to_be32(GFS2_DIF_JDATA); | |
160b4026 SW |
499 | break; |
500 | case S_IFDIR: | |
e2d0a13b SW |
501 | di->di_flags |= cpu_to_be32(dip->i_diskflags & |
502 | GFS2_DIF_INHERIT_JDATA); | |
503 | di->di_flags |= cpu_to_be32(GFS2_DIF_JDATA); | |
504 | di->di_size = cpu_to_be64(sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode)); | |
505 | di->di_entries = cpu_to_be32(2); | |
506 | gfs2_init_dir(dibh, dip); | |
160b4026 SW |
507 | break; |
508 | case S_IFLNK: | |
509 | memcpy(dibh->b_data + sizeof(struct gfs2_dinode), symname, size); | |
510 | break; | |
e2d0a13b SW |
511 | } |
512 | ||
194c011f SW |
513 | set_buffer_uptodate(dibh); |
514 | ||
515 | *bhp = dibh; | |
516 | } | |
517 | ||
518 | static int make_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl, | |
519 | unsigned int mode, const struct gfs2_inum_host *inum, | |
160b4026 SW |
520 | const u64 *generation, dev_t dev, const char *symname, |
521 | unsigned int size, struct buffer_head **bhp) | |
194c011f SW |
522 | { |
523 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); | |
524 | unsigned int uid, gid; | |
525 | int error; | |
526 | ||
527 | munge_mode_uid_gid(dip, &mode, &uid, &gid); | |
528 | if (!gfs2_alloc_get(dip)) | |
529 | return -ENOMEM; | |
530 | ||
531 | error = gfs2_quota_lock(dip, uid, gid); | |
532 | if (error) | |
533 | goto out; | |
534 | ||
535 | error = gfs2_quota_check(dip, uid, gid); | |
536 | if (error) | |
537 | goto out_quota; | |
538 | ||
539 | error = gfs2_trans_begin(sdp, RES_DINODE + RES_QUOTA, 0); | |
540 | if (error) | |
541 | goto out_quota; | |
542 | ||
160b4026 | 543 | init_dinode(dip, gl, inum, mode, uid, gid, generation, dev, symname, size, bhp); |
194c011f SW |
544 | gfs2_quota_change(dip, +1, uid, gid); |
545 | gfs2_trans_end(sdp); | |
546 | ||
547 | out_quota: | |
548 | gfs2_quota_unlock(dip); | |
549 | out: | |
550 | gfs2_alloc_put(dip); | |
551 | return error; | |
552 | } | |
553 | ||
554 | static int link_dinode(struct gfs2_inode *dip, const struct qstr *name, | |
555 | struct gfs2_inode *ip) | |
556 | { | |
557 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); | |
558 | struct gfs2_alloc *al; | |
559 | int alloc_required; | |
560 | struct buffer_head *dibh; | |
561 | int error; | |
562 | ||
563 | al = gfs2_alloc_get(dip); | |
564 | if (!al) | |
565 | return -ENOMEM; | |
566 | ||
567 | error = gfs2_quota_lock(dip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE); | |
568 | if (error) | |
569 | goto fail; | |
570 | ||
571 | error = alloc_required = gfs2_diradd_alloc_required(&dip->i_inode, name); | |
572 | if (alloc_required < 0) | |
573 | goto fail_quota_locks; | |
574 | if (alloc_required) { | |
575 | error = gfs2_quota_check(dip, dip->i_inode.i_uid, dip->i_inode.i_gid); | |
576 | if (error) | |
577 | goto fail_quota_locks; | |
578 | ||
579 | al->al_requested = sdp->sd_max_dirres; | |
580 | ||
581 | error = gfs2_inplace_reserve(dip); | |
582 | if (error) | |
583 | goto fail_quota_locks; | |
584 | ||
585 | error = gfs2_trans_begin(sdp, sdp->sd_max_dirres + | |
54335b1f | 586 | dip->i_rgd->rd_length + |
194c011f SW |
587 | 2 * RES_DINODE + |
588 | RES_STATFS + RES_QUOTA, 0); | |
589 | if (error) | |
590 | goto fail_ipreserv; | |
591 | } else { | |
592 | error = gfs2_trans_begin(sdp, RES_LEAF + 2 * RES_DINODE, 0); | |
593 | if (error) | |
594 | goto fail_quota_locks; | |
595 | } | |
596 | ||
597 | error = gfs2_dir_add(&dip->i_inode, name, ip); | |
598 | if (error) | |
599 | goto fail_end_trans; | |
600 | ||
601 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
602 | if (error) | |
603 | goto fail_end_trans; | |
e2d0a13b SW |
604 | inc_nlink(&ip->i_inode); |
605 | if (S_ISDIR(ip->i_inode.i_mode)) | |
606 | inc_nlink(&ip->i_inode); | |
194c011f SW |
607 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
608 | gfs2_dinode_out(ip, dibh->b_data); | |
609 | brelse(dibh); | |
610 | return 0; | |
611 | ||
612 | fail_end_trans: | |
613 | gfs2_trans_end(sdp); | |
614 | ||
615 | fail_ipreserv: | |
54335b1f | 616 | gfs2_inplace_release(dip); |
194c011f SW |
617 | |
618 | fail_quota_locks: | |
619 | gfs2_quota_unlock(dip); | |
620 | ||
621 | fail: | |
622 | gfs2_alloc_put(dip); | |
623 | return error; | |
624 | } | |
625 | ||
9d8f13ba MZ |
626 | int gfs2_initxattrs(struct inode *inode, const struct xattr *xattr_array, |
627 | void *fs_info) | |
194c011f | 628 | { |
9d8f13ba MZ |
629 | const struct xattr *xattr; |
630 | int err = 0; | |
631 | ||
632 | for (xattr = xattr_array; xattr->name != NULL; xattr++) { | |
633 | err = __gfs2_xattr_set(inode, xattr->name, xattr->value, | |
634 | xattr->value_len, 0, | |
635 | GFS2_EATYPE_SECURITY); | |
636 | if (err < 0) | |
637 | break; | |
194c011f | 638 | } |
194c011f SW |
639 | return err; |
640 | } | |
b3b94faa | 641 | |
9d8f13ba MZ |
642 | static int gfs2_security_init(struct gfs2_inode *dip, struct gfs2_inode *ip, |
643 | const struct qstr *qstr) | |
644 | { | |
645 | return security_inode_init_security(&ip->i_inode, &dip->i_inode, qstr, | |
646 | &gfs2_initxattrs, NULL); | |
647 | } | |
648 | ||
194c011f | 649 | /** |
f2741d98 SW |
650 | * gfs2_create_inode - Create a new inode |
651 | * @dir: The parent directory | |
652 | * @dentry: The new dentry | |
653 | * @mode: The permissions on the new inode | |
654 | * @dev: For device nodes, this is the device number | |
655 | * @symname: For symlinks, this is the link destination | |
656 | * @size: The initial size of the inode (ignored for directories) | |
194c011f | 657 | * |
f2741d98 | 658 | * Returns: 0 on success, or error code |
194c011f SW |
659 | */ |
660 | ||
f2741d98 SW |
661 | static int gfs2_create_inode(struct inode *dir, struct dentry *dentry, |
662 | unsigned int mode, dev_t dev, const char *symname, | |
9a63edd1 | 663 | unsigned int size, int excl) |
194c011f | 664 | { |
f2741d98 SW |
665 | const struct qstr *name = &dentry->d_name; |
666 | struct gfs2_holder ghs[2]; | |
194c011f | 667 | struct inode *inode = NULL; |
f2741d98 | 668 | struct gfs2_inode *dip = GFS2_I(dir); |
194c011f SW |
669 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); |
670 | struct gfs2_inum_host inum = { .no_addr = 0, .no_formal_ino = 0 }; | |
671 | int error; | |
672 | u64 generation; | |
673 | struct buffer_head *bh = NULL; | |
674 | ||
675 | if (!name->len || name->len > GFS2_FNAMESIZE) | |
f2741d98 | 676 | return -ENAMETOOLONG; |
194c011f | 677 | |
f2741d98 | 678 | error = gfs2_glock_nq_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); |
194c011f SW |
679 | if (error) |
680 | goto fail; | |
681 | ||
682 | error = create_ok(dip, name, mode); | |
9a63edd1 SW |
683 | if ((error == -EEXIST) && S_ISREG(mode) && !excl) { |
684 | inode = gfs2_lookupi(dir, &dentry->d_name, 0); | |
685 | gfs2_glock_dq_uninit(ghs); | |
686 | d_instantiate(dentry, inode); | |
687 | return IS_ERR(inode) ? PTR_ERR(inode) : 0; | |
688 | } | |
194c011f SW |
689 | if (error) |
690 | goto fail_gunlock; | |
691 | ||
692 | error = alloc_dinode(dip, &inum.no_addr, &generation); | |
693 | if (error) | |
694 | goto fail_gunlock; | |
695 | inum.no_formal_ino = generation; | |
696 | ||
697 | error = gfs2_glock_nq_num(sdp, inum.no_addr, &gfs2_inode_glops, | |
698 | LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1); | |
699 | if (error) | |
700 | goto fail_gunlock; | |
701 | ||
160b4026 | 702 | error = make_dinode(dip, ghs[1].gh_gl, mode, &inum, &generation, dev, symname, size, &bh); |
194c011f SW |
703 | if (error) |
704 | goto fail_gunlock2; | |
705 | ||
706 | inode = gfs2_inode_lookup(dir->i_sb, IF2DT(mode), inum.no_addr, | |
707 | inum.no_formal_ino, 0); | |
708 | if (IS_ERR(inode)) | |
709 | goto fail_gunlock2; | |
710 | ||
711 | error = gfs2_inode_refresh(GFS2_I(inode)); | |
712 | if (error) | |
713 | goto fail_gunlock2; | |
714 | ||
715 | error = gfs2_acl_create(dip, inode); | |
716 | if (error) | |
717 | goto fail_gunlock2; | |
718 | ||
719 | error = gfs2_security_init(dip, GFS2_I(inode), name); | |
720 | if (error) | |
721 | goto fail_gunlock2; | |
722 | ||
723 | error = link_dinode(dip, name, GFS2_I(inode)); | |
724 | if (error) | |
725 | goto fail_gunlock2; | |
726 | ||
727 | if (bh) | |
728 | brelse(bh); | |
f2741d98 SW |
729 | |
730 | gfs2_trans_end(sdp); | |
54335b1f | 731 | gfs2_inplace_release(dip); |
f2741d98 SW |
732 | gfs2_quota_unlock(dip); |
733 | gfs2_alloc_put(dip); | |
f2741d98 | 734 | mark_inode_dirty(inode); |
ab9bbda0 | 735 | gfs2_glock_dq_uninit_m(2, ghs); |
f2741d98 SW |
736 | d_instantiate(dentry, inode); |
737 | return 0; | |
194c011f SW |
738 | |
739 | fail_gunlock2: | |
740 | gfs2_glock_dq_uninit(ghs + 1); | |
194c011f | 741 | fail_gunlock: |
f2741d98 | 742 | gfs2_glock_dq_uninit(ghs); |
40ac218f SW |
743 | if (inode && !IS_ERR(inode)) { |
744 | set_bit(GIF_ALLOC_FAILED, &GFS2_I(inode)->i_flags); | |
745 | iput(inode); | |
746 | } | |
194c011f SW |
747 | fail: |
748 | if (bh) | |
749 | brelse(bh); | |
f2741d98 | 750 | return error; |
194c011f | 751 | } |
f2741d98 | 752 | |
b3b94faa DT |
753 | /** |
754 | * gfs2_create - Create a file | |
755 | * @dir: The directory in which to create the file | |
756 | * @dentry: The dentry of the new file | |
757 | * @mode: The mode of the new file | |
758 | * | |
759 | * Returns: errno | |
760 | */ | |
761 | ||
762 | static int gfs2_create(struct inode *dir, struct dentry *dentry, | |
763 | int mode, struct nameidata *nd) | |
764 | { | |
9a63edd1 SW |
765 | int excl = 0; |
766 | if (nd && (nd->flags & LOOKUP_EXCL)) | |
767 | excl = 1; | |
768 | return gfs2_create_inode(dir, dentry, S_IFREG | mode, 0, NULL, 0, excl); | |
b3b94faa DT |
769 | } |
770 | ||
771 | /** | |
772 | * gfs2_lookup - Look up a filename in a directory and return its inode | |
773 | * @dir: The directory inode | |
774 | * @dentry: The dentry of the new inode | |
775 | * @nd: passed from Linux VFS, ignored by us | |
776 | * | |
777 | * Called by the VFS layer. Lock dir and call gfs2_lookupi() | |
778 | * | |
779 | * Returns: errno | |
780 | */ | |
781 | ||
782 | static struct dentry *gfs2_lookup(struct inode *dir, struct dentry *dentry, | |
783 | struct nameidata *nd) | |
784 | { | |
6c673ab3 AV |
785 | struct inode *inode = gfs2_lookupi(dir, &dentry->d_name, 0); |
786 | if (inode && !IS_ERR(inode)) { | |
9656b2c1 SW |
787 | struct gfs2_glock *gl = GFS2_I(inode)->i_gl; |
788 | struct gfs2_holder gh; | |
789 | int error; | |
790 | error = gfs2_glock_nq_init(gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); | |
791 | if (error) { | |
792 | iput(inode); | |
793 | return ERR_PTR(error); | |
794 | } | |
795 | gfs2_glock_dq_uninit(&gh); | |
9656b2c1 | 796 | } |
6c673ab3 | 797 | return d_splice_alias(inode, dentry); |
b3b94faa DT |
798 | } |
799 | ||
800 | /** | |
801 | * gfs2_link - Link to a file | |
802 | * @old_dentry: The inode to link | |
803 | * @dir: Add link to this directory | |
804 | * @dentry: The name of the link | |
805 | * | |
806 | * Link the inode in "old_dentry" into the directory "dir" with the | |
807 | * name in "dentry". | |
808 | * | |
809 | * Returns: errno | |
810 | */ | |
811 | ||
812 | static int gfs2_link(struct dentry *old_dentry, struct inode *dir, | |
813 | struct dentry *dentry) | |
814 | { | |
feaa7bba SW |
815 | struct gfs2_inode *dip = GFS2_I(dir); |
816 | struct gfs2_sbd *sdp = GFS2_SB(dir); | |
b3b94faa | 817 | struct inode *inode = old_dentry->d_inode; |
feaa7bba | 818 | struct gfs2_inode *ip = GFS2_I(inode); |
b3b94faa | 819 | struct gfs2_holder ghs[2]; |
2baee03f | 820 | struct buffer_head *dibh; |
b3b94faa DT |
821 | int alloc_required; |
822 | int error; | |
823 | ||
b60623c2 | 824 | if (S_ISDIR(inode->i_mode)) |
b3b94faa DT |
825 | return -EPERM; |
826 | ||
827 | gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); | |
828 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); | |
829 | ||
72dbf479 BP |
830 | error = gfs2_glock_nq(ghs); /* parent */ |
831 | if (error) | |
832 | goto out_parent; | |
833 | ||
834 | error = gfs2_glock_nq(ghs + 1); /* child */ | |
b3b94faa | 835 | if (error) |
72dbf479 | 836 | goto out_child; |
b3b94faa | 837 | |
d192a8e5 SW |
838 | error = -ENOENT; |
839 | if (inode->i_nlink == 0) | |
840 | goto out_gunlock; | |
841 | ||
10556cb2 | 842 | error = gfs2_permission(dir, MAY_WRITE | MAY_EXEC); |
b3b94faa DT |
843 | if (error) |
844 | goto out_gunlock; | |
845 | ||
dbb7cae2 | 846 | error = gfs2_dir_check(dir, &dentry->d_name, NULL); |
b3b94faa DT |
847 | switch (error) { |
848 | case -ENOENT: | |
849 | break; | |
850 | case 0: | |
851 | error = -EEXIST; | |
852 | default: | |
853 | goto out_gunlock; | |
854 | } | |
855 | ||
856 | error = -EINVAL; | |
4f56110a | 857 | if (!dip->i_inode.i_nlink) |
b3b94faa DT |
858 | goto out_gunlock; |
859 | error = -EFBIG; | |
ad6203f2 | 860 | if (dip->i_entries == (u32)-1) |
b3b94faa DT |
861 | goto out_gunlock; |
862 | error = -EPERM; | |
863 | if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) | |
864 | goto out_gunlock; | |
865 | error = -EINVAL; | |
4f56110a | 866 | if (!ip->i_inode.i_nlink) |
b3b94faa DT |
867 | goto out_gunlock; |
868 | error = -EMLINK; | |
4f56110a | 869 | if (ip->i_inode.i_nlink == (u32)-1) |
b3b94faa DT |
870 | goto out_gunlock; |
871 | ||
c752666c SW |
872 | alloc_required = error = gfs2_diradd_alloc_required(dir, &dentry->d_name); |
873 | if (error < 0) | |
b3b94faa | 874 | goto out_gunlock; |
c752666c | 875 | error = 0; |
b3b94faa DT |
876 | |
877 | if (alloc_required) { | |
878 | struct gfs2_alloc *al = gfs2_alloc_get(dip); | |
182fe5ab CG |
879 | if (!al) { |
880 | error = -ENOMEM; | |
881 | goto out_gunlock; | |
882 | } | |
b3b94faa | 883 | |
d82661d9 | 884 | error = gfs2_quota_lock_check(dip); |
b3b94faa DT |
885 | if (error) |
886 | goto out_alloc; | |
887 | ||
b3b94faa DT |
888 | al->al_requested = sdp->sd_max_dirres; |
889 | ||
890 | error = gfs2_inplace_reserve(dip); | |
891 | if (error) | |
892 | goto out_gunlock_q; | |
893 | ||
1b50259b | 894 | error = gfs2_trans_begin(sdp, sdp->sd_max_dirres + |
54335b1f | 895 | gfs2_rg_blocks(dip) + |
b3b94faa DT |
896 | 2 * RES_DINODE + RES_STATFS + |
897 | RES_QUOTA, 0); | |
898 | if (error) | |
899 | goto out_ipres; | |
900 | } else { | |
901 | error = gfs2_trans_begin(sdp, 2 * RES_DINODE + RES_LEAF, 0); | |
902 | if (error) | |
903 | goto out_ipres; | |
904 | } | |
905 | ||
2baee03f | 906 | error = gfs2_meta_inode_buffer(ip, &dibh); |
b3b94faa DT |
907 | if (error) |
908 | goto out_end_trans; | |
909 | ||
3d6ecb7d | 910 | error = gfs2_dir_add(dir, &dentry->d_name, ip); |
2baee03f SW |
911 | if (error) |
912 | goto out_brelse; | |
913 | ||
914 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); | |
915 | inc_nlink(&ip->i_inode); | |
916 | ip->i_inode.i_ctime = CURRENT_TIME; | |
ab9bbda0 SW |
917 | ihold(inode); |
918 | d_instantiate(dentry, inode); | |
919 | mark_inode_dirty(inode); | |
b3b94faa | 920 | |
2baee03f SW |
921 | out_brelse: |
922 | brelse(dibh); | |
feaa7bba | 923 | out_end_trans: |
b3b94faa | 924 | gfs2_trans_end(sdp); |
feaa7bba | 925 | out_ipres: |
b3b94faa DT |
926 | if (alloc_required) |
927 | gfs2_inplace_release(dip); | |
feaa7bba | 928 | out_gunlock_q: |
b3b94faa DT |
929 | if (alloc_required) |
930 | gfs2_quota_unlock(dip); | |
feaa7bba | 931 | out_alloc: |
b3b94faa DT |
932 | if (alloc_required) |
933 | gfs2_alloc_put(dip); | |
feaa7bba | 934 | out_gunlock: |
72dbf479 BP |
935 | gfs2_glock_dq(ghs + 1); |
936 | out_child: | |
937 | gfs2_glock_dq(ghs); | |
938 | out_parent: | |
b3b94faa DT |
939 | gfs2_holder_uninit(ghs); |
940 | gfs2_holder_uninit(ghs + 1); | |
b3b94faa DT |
941 | return error; |
942 | } | |
943 | ||
87ec2174 SW |
944 | /* |
945 | * gfs2_unlink_ok - check to see that a inode is still in a directory | |
946 | * @dip: the directory | |
947 | * @name: the name of the file | |
948 | * @ip: the inode | |
949 | * | |
950 | * Assumes that the lock on (at least) @dip is held. | |
951 | * | |
952 | * Returns: 0 if the parent/child relationship is correct, errno if it isn't | |
953 | */ | |
954 | ||
955 | static int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name, | |
956 | const struct gfs2_inode *ip) | |
957 | { | |
958 | int error; | |
959 | ||
960 | if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode)) | |
961 | return -EPERM; | |
962 | ||
963 | if ((dip->i_inode.i_mode & S_ISVTX) && | |
964 | dip->i_inode.i_uid != current_fsuid() && | |
965 | ip->i_inode.i_uid != current_fsuid() && !capable(CAP_FOWNER)) | |
966 | return -EPERM; | |
967 | ||
968 | if (IS_APPEND(&dip->i_inode)) | |
969 | return -EPERM; | |
970 | ||
10556cb2 | 971 | error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC); |
87ec2174 SW |
972 | if (error) |
973 | return error; | |
974 | ||
975 | error = gfs2_dir_check(&dip->i_inode, name, ip); | |
976 | if (error) | |
977 | return error; | |
978 | ||
979 | return 0; | |
980 | } | |
981 | ||
b3b94faa | 982 | /** |
855d23ce SW |
983 | * gfs2_unlink_inode - Removes an inode from its parent dir and unlinks it |
984 | * @dip: The parent directory | |
985 | * @name: The name of the entry in the parent directory | |
986 | * @bh: The inode buffer for the inode to be removed | |
987 | * @inode: The inode to be removed | |
988 | * | |
989 | * Called with all the locks and in a transaction. This will only be | |
990 | * called for a directory after it has been checked to ensure it is empty. | |
991 | * | |
992 | * Returns: 0 on success, or an error | |
993 | */ | |
994 | ||
995 | static int gfs2_unlink_inode(struct gfs2_inode *dip, | |
996 | const struct dentry *dentry, | |
997 | struct buffer_head *bh) | |
998 | { | |
999 | struct inode *inode = dentry->d_inode; | |
1000 | struct gfs2_inode *ip = GFS2_I(inode); | |
1001 | int error; | |
1002 | ||
1003 | error = gfs2_dir_del(dip, dentry); | |
1004 | if (error) | |
1005 | return error; | |
1006 | ||
1007 | ip->i_entries = 0; | |
1008 | inode->i_ctime = CURRENT_TIME; | |
1009 | if (S_ISDIR(inode->i_mode)) | |
1010 | clear_nlink(inode); | |
1011 | else | |
1012 | drop_nlink(inode); | |
855d23ce SW |
1013 | mark_inode_dirty(inode); |
1014 | if (inode->i_nlink == 0) | |
1015 | gfs2_unlink_di(inode); | |
1016 | return 0; | |
1017 | } | |
1018 | ||
1019 | ||
1020 | /** | |
1021 | * gfs2_unlink - Unlink an inode (this does rmdir as well) | |
1022 | * @dir: The inode of the directory containing the inode to unlink | |
b3b94faa DT |
1023 | * @dentry: The file itself |
1024 | * | |
855d23ce SW |
1025 | * This routine uses the type of the inode as a flag to figure out |
1026 | * whether this is an unlink or an rmdir. | |
b3b94faa DT |
1027 | * |
1028 | * Returns: errno | |
1029 | */ | |
1030 | ||
1031 | static int gfs2_unlink(struct inode *dir, struct dentry *dentry) | |
1032 | { | |
feaa7bba SW |
1033 | struct gfs2_inode *dip = GFS2_I(dir); |
1034 | struct gfs2_sbd *sdp = GFS2_SB(dir); | |
855d23ce SW |
1035 | struct inode *inode = dentry->d_inode; |
1036 | struct gfs2_inode *ip = GFS2_I(inode); | |
1037 | struct buffer_head *bh; | |
ddee7608 RC |
1038 | struct gfs2_holder ghs[3]; |
1039 | struct gfs2_rgrpd *rgd; | |
b3b94faa DT |
1040 | int error; |
1041 | ||
b3b94faa | 1042 | gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); |
ddee7608 | 1043 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); |
b3b94faa | 1044 | |
dbb7cae2 | 1045 | rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr); |
ddee7608 RC |
1046 | gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2); |
1047 | ||
1048 | ||
8497a46e | 1049 | error = gfs2_glock_nq(ghs); /* parent */ |
b3b94faa | 1050 | if (error) |
8497a46e SW |
1051 | goto out_parent; |
1052 | ||
1053 | error = gfs2_glock_nq(ghs + 1); /* child */ | |
1054 | if (error) | |
1055 | goto out_child; | |
1056 | ||
d192a8e5 | 1057 | error = -ENOENT; |
855d23ce | 1058 | if (inode->i_nlink == 0) |
d192a8e5 SW |
1059 | goto out_rgrp; |
1060 | ||
855d23ce SW |
1061 | if (S_ISDIR(inode->i_mode)) { |
1062 | error = -ENOTEMPTY; | |
1063 | if (ip->i_entries > 2 || inode->i_nlink > 2) | |
1064 | goto out_rgrp; | |
1065 | } | |
1066 | ||
8497a46e SW |
1067 | error = gfs2_glock_nq(ghs + 2); /* rgrp */ |
1068 | if (error) | |
1069 | goto out_rgrp; | |
b3b94faa DT |
1070 | |
1071 | error = gfs2_unlink_ok(dip, &dentry->d_name, ip); | |
1072 | if (error) | |
72dbf479 | 1073 | goto out_gunlock; |
b3b94faa | 1074 | |
855d23ce | 1075 | error = gfs2_trans_begin(sdp, 2*RES_DINODE + 3*RES_LEAF + RES_RG_BIT, 0); |
b3b94faa | 1076 | if (error) |
cd012075 | 1077 | goto out_gunlock; |
b3b94faa | 1078 | |
855d23ce SW |
1079 | error = gfs2_meta_inode_buffer(ip, &bh); |
1080 | if (error) | |
1081 | goto out_end_trans; | |
b3b94faa | 1082 | |
855d23ce SW |
1083 | error = gfs2_unlink_inode(dip, dentry, bh); |
1084 | brelse(bh); | |
b3b94faa | 1085 | |
feaa7bba SW |
1086 | out_end_trans: |
1087 | gfs2_trans_end(sdp); | |
72dbf479 | 1088 | out_gunlock: |
8497a46e SW |
1089 | gfs2_glock_dq(ghs + 2); |
1090 | out_rgrp: | |
ddee7608 | 1091 | gfs2_holder_uninit(ghs + 2); |
8497a46e SW |
1092 | gfs2_glock_dq(ghs + 1); |
1093 | out_child: | |
1094 | gfs2_holder_uninit(ghs + 1); | |
1095 | gfs2_glock_dq(ghs); | |
1096 | out_parent: | |
1097 | gfs2_holder_uninit(ghs); | |
b3b94faa DT |
1098 | return error; |
1099 | } | |
1100 | ||
1101 | /** | |
1102 | * gfs2_symlink - Create a symlink | |
1103 | * @dir: The directory to create the symlink in | |
1104 | * @dentry: The dentry to put the symlink in | |
1105 | * @symname: The thing which the link points to | |
1106 | * | |
1107 | * Returns: errno | |
1108 | */ | |
1109 | ||
1110 | static int gfs2_symlink(struct inode *dir, struct dentry *dentry, | |
1111 | const char *symname) | |
1112 | { | |
feaa7bba | 1113 | struct gfs2_sbd *sdp = GFS2_SB(dir); |
160b4026 | 1114 | unsigned int size; |
b3b94faa | 1115 | |
b3b94faa DT |
1116 | size = strlen(symname); |
1117 | if (size > sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode) - 1) | |
1118 | return -ENAMETOOLONG; | |
1119 | ||
9a63edd1 | 1120 | return gfs2_create_inode(dir, dentry, S_IFLNK | S_IRWXUGO, 0, symname, size, 0); |
b3b94faa DT |
1121 | } |
1122 | ||
1123 | /** | |
1124 | * gfs2_mkdir - Make a directory | |
1125 | * @dir: The parent directory of the new one | |
1126 | * @dentry: The dentry of the new directory | |
1127 | * @mode: The mode of the new directory | |
1128 | * | |
1129 | * Returns: errno | |
1130 | */ | |
1131 | ||
1132 | static int gfs2_mkdir(struct inode *dir, struct dentry *dentry, int mode) | |
1133 | { | |
9a63edd1 | 1134 | return gfs2_create_inode(dir, dentry, S_IFDIR | mode, 0, NULL, 0, 0); |
b3b94faa DT |
1135 | } |
1136 | ||
b3b94faa DT |
1137 | /** |
1138 | * gfs2_mknod - Make a special file | |
1139 | * @dir: The directory in which the special file will reside | |
1140 | * @dentry: The dentry of the special file | |
1141 | * @mode: The mode of the special file | |
f2741d98 | 1142 | * @dev: The device specification of the special file |
b3b94faa DT |
1143 | * |
1144 | */ | |
1145 | ||
1146 | static int gfs2_mknod(struct inode *dir, struct dentry *dentry, int mode, | |
1147 | dev_t dev) | |
1148 | { | |
9a63edd1 | 1149 | return gfs2_create_inode(dir, dentry, mode, dev, NULL, 0, 0); |
b3b94faa DT |
1150 | } |
1151 | ||
0188d6c5 SW |
1152 | /* |
1153 | * gfs2_ok_to_move - check if it's ok to move a directory to another directory | |
1154 | * @this: move this | |
1155 | * @to: to here | |
1156 | * | |
1157 | * Follow @to back to the root and make sure we don't encounter @this | |
1158 | * Assumes we already hold the rename lock. | |
1159 | * | |
1160 | * Returns: errno | |
1161 | */ | |
1162 | ||
1163 | static int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to) | |
1164 | { | |
1165 | struct inode *dir = &to->i_inode; | |
1166 | struct super_block *sb = dir->i_sb; | |
1167 | struct inode *tmp; | |
0188d6c5 SW |
1168 | int error = 0; |
1169 | ||
0188d6c5 SW |
1170 | igrab(dir); |
1171 | ||
1172 | for (;;) { | |
1173 | if (dir == &this->i_inode) { | |
1174 | error = -EINVAL; | |
1175 | break; | |
1176 | } | |
1177 | if (dir == sb->s_root->d_inode) { | |
1178 | error = 0; | |
1179 | break; | |
1180 | } | |
1181 | ||
8d123585 | 1182 | tmp = gfs2_lookupi(dir, &gfs2_qdotdot, 1); |
0188d6c5 SW |
1183 | if (IS_ERR(tmp)) { |
1184 | error = PTR_ERR(tmp); | |
1185 | break; | |
1186 | } | |
1187 | ||
1188 | iput(dir); | |
1189 | dir = tmp; | |
1190 | } | |
1191 | ||
1192 | iput(dir); | |
1193 | ||
1194 | return error; | |
1195 | } | |
1196 | ||
b3b94faa DT |
1197 | /** |
1198 | * gfs2_rename - Rename a file | |
1199 | * @odir: Parent directory of old file name | |
1200 | * @odentry: The old dentry of the file | |
1201 | * @ndir: Parent directory of new file name | |
1202 | * @ndentry: The new dentry of the file | |
1203 | * | |
1204 | * Returns: errno | |
1205 | */ | |
1206 | ||
1207 | static int gfs2_rename(struct inode *odir, struct dentry *odentry, | |
1208 | struct inode *ndir, struct dentry *ndentry) | |
1209 | { | |
feaa7bba SW |
1210 | struct gfs2_inode *odip = GFS2_I(odir); |
1211 | struct gfs2_inode *ndip = GFS2_I(ndir); | |
1212 | struct gfs2_inode *ip = GFS2_I(odentry->d_inode); | |
b3b94faa | 1213 | struct gfs2_inode *nip = NULL; |
feaa7bba | 1214 | struct gfs2_sbd *sdp = GFS2_SB(odir); |
8339ee54 | 1215 | struct gfs2_holder ghs[5], r_gh = { .gh_gl = NULL, }; |
ddee7608 | 1216 | struct gfs2_rgrpd *nrgd; |
b3b94faa DT |
1217 | unsigned int num_gh; |
1218 | int dir_rename = 0; | |
24b977b5 | 1219 | int alloc_required = 0; |
b3b94faa DT |
1220 | unsigned int x; |
1221 | int error; | |
1222 | ||
b3b94faa | 1223 | if (ndentry->d_inode) { |
feaa7bba | 1224 | nip = GFS2_I(ndentry->d_inode); |
b3b94faa DT |
1225 | if (ip == nip) |
1226 | return 0; | |
1227 | } | |
1228 | ||
0188d6c5 SW |
1229 | if (odip != ndip) { |
1230 | error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE, | |
1231 | 0, &r_gh); | |
b3b94faa DT |
1232 | if (error) |
1233 | goto out; | |
1234 | ||
0188d6c5 SW |
1235 | if (S_ISDIR(ip->i_inode.i_mode)) { |
1236 | dir_rename = 1; | |
1237 | /* don't move a dirctory into it's subdir */ | |
1238 | error = gfs2_ok_to_move(ip, ndip); | |
1239 | if (error) | |
1240 | goto out_gunlock_r; | |
1241 | } | |
b3b94faa DT |
1242 | } |
1243 | ||
d9d1ca30 | 1244 | num_gh = 1; |
b3b94faa | 1245 | gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); |
d9d1ca30 SW |
1246 | if (odip != ndip) { |
1247 | gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); | |
1248 | num_gh++; | |
1249 | } | |
1250 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); | |
1251 | num_gh++; | |
b3b94faa | 1252 | |
d9d1ca30 SW |
1253 | if (nip) { |
1254 | gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); | |
1255 | num_gh++; | |
ddee7608 RC |
1256 | /* grab the resource lock for unlink flag twiddling |
1257 | * this is the case of the target file already existing | |
1258 | * so we unlink before doing the rename | |
1259 | */ | |
dbb7cae2 | 1260 | nrgd = gfs2_blk2rgrpd(sdp, nip->i_no_addr); |
ddee7608 RC |
1261 | if (nrgd) |
1262 | gfs2_holder_init(nrgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh++); | |
d9d1ca30 | 1263 | } |
b3b94faa | 1264 | |
72dbf479 BP |
1265 | for (x = 0; x < num_gh; x++) { |
1266 | error = gfs2_glock_nq(ghs + x); | |
1267 | if (error) | |
1268 | goto out_gunlock; | |
1269 | } | |
b3b94faa | 1270 | |
d192a8e5 SW |
1271 | error = -ENOENT; |
1272 | if (ip->i_inode.i_nlink == 0) | |
1273 | goto out_gunlock; | |
1274 | ||
b3b94faa DT |
1275 | /* Check out the old directory */ |
1276 | ||
1277 | error = gfs2_unlink_ok(odip, &odentry->d_name, ip); | |
1278 | if (error) | |
1279 | goto out_gunlock; | |
1280 | ||
1281 | /* Check out the new directory */ | |
1282 | ||
1283 | if (nip) { | |
1284 | error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip); | |
1285 | if (error) | |
1286 | goto out_gunlock; | |
1287 | ||
d192a8e5 SW |
1288 | if (nip->i_inode.i_nlink == 0) { |
1289 | error = -EAGAIN; | |
1290 | goto out_gunlock; | |
1291 | } | |
1292 | ||
b60623c2 | 1293 | if (S_ISDIR(nip->i_inode.i_mode)) { |
ad6203f2 | 1294 | if (nip->i_entries < 2) { |
94fb763b | 1295 | gfs2_consist_inode(nip); |
b3b94faa DT |
1296 | error = -EIO; |
1297 | goto out_gunlock; | |
1298 | } | |
ad6203f2 | 1299 | if (nip->i_entries > 2) { |
b3b94faa DT |
1300 | error = -ENOTEMPTY; |
1301 | goto out_gunlock; | |
1302 | } | |
1303 | } | |
1304 | } else { | |
10556cb2 | 1305 | error = gfs2_permission(ndir, MAY_WRITE | MAY_EXEC); |
b3b94faa DT |
1306 | if (error) |
1307 | goto out_gunlock; | |
1308 | ||
dbb7cae2 | 1309 | error = gfs2_dir_check(ndir, &ndentry->d_name, NULL); |
b3b94faa DT |
1310 | switch (error) { |
1311 | case -ENOENT: | |
1312 | error = 0; | |
1313 | break; | |
1314 | case 0: | |
1315 | error = -EEXIST; | |
1316 | default: | |
1317 | goto out_gunlock; | |
1318 | }; | |
1319 | ||
1320 | if (odip != ndip) { | |
4f56110a | 1321 | if (!ndip->i_inode.i_nlink) { |
d192a8e5 | 1322 | error = -ENOENT; |
b3b94faa DT |
1323 | goto out_gunlock; |
1324 | } | |
ad6203f2 | 1325 | if (ndip->i_entries == (u32)-1) { |
b3b94faa DT |
1326 | error = -EFBIG; |
1327 | goto out_gunlock; | |
1328 | } | |
b60623c2 | 1329 | if (S_ISDIR(ip->i_inode.i_mode) && |
4f56110a | 1330 | ndip->i_inode.i_nlink == (u32)-1) { |
b3b94faa DT |
1331 | error = -EMLINK; |
1332 | goto out_gunlock; | |
1333 | } | |
1334 | } | |
1335 | } | |
1336 | ||
1337 | /* Check out the dir to be renamed */ | |
1338 | ||
1339 | if (dir_rename) { | |
10556cb2 | 1340 | error = gfs2_permission(odentry->d_inode, MAY_WRITE); |
b3b94faa DT |
1341 | if (error) |
1342 | goto out_gunlock; | |
1343 | } | |
1344 | ||
24b977b5 SW |
1345 | if (nip == NULL) |
1346 | alloc_required = gfs2_diradd_alloc_required(ndir, &ndentry->d_name); | |
1347 | error = alloc_required; | |
c752666c | 1348 | if (error < 0) |
b3b94faa | 1349 | goto out_gunlock; |
c752666c | 1350 | error = 0; |
b3b94faa DT |
1351 | |
1352 | if (alloc_required) { | |
1353 | struct gfs2_alloc *al = gfs2_alloc_get(ndip); | |
182fe5ab CG |
1354 | if (!al) { |
1355 | error = -ENOMEM; | |
1356 | goto out_gunlock; | |
1357 | } | |
b3b94faa | 1358 | |
d82661d9 | 1359 | error = gfs2_quota_lock_check(ndip); |
b3b94faa DT |
1360 | if (error) |
1361 | goto out_alloc; | |
1362 | ||
b3b94faa DT |
1363 | al->al_requested = sdp->sd_max_dirres; |
1364 | ||
8339ee54 | 1365 | error = gfs2_inplace_reserve(ndip); |
b3b94faa DT |
1366 | if (error) |
1367 | goto out_gunlock_q; | |
1368 | ||
fe1bdedc | 1369 | error = gfs2_trans_begin(sdp, sdp->sd_max_dirres + |
54335b1f | 1370 | gfs2_rg_blocks(ndip) + |
b3b94faa | 1371 | 4 * RES_DINODE + 4 * RES_LEAF + |
87d21e07 | 1372 | RES_STATFS + RES_QUOTA + 4, 0); |
b3b94faa DT |
1373 | if (error) |
1374 | goto out_ipreserv; | |
1375 | } else { | |
1376 | error = gfs2_trans_begin(sdp, 4 * RES_DINODE + | |
87d21e07 | 1377 | 5 * RES_LEAF + 4, 0); |
b3b94faa DT |
1378 | if (error) |
1379 | goto out_gunlock; | |
1380 | } | |
1381 | ||
1382 | /* Remove the target file, if it exists */ | |
1383 | ||
1384 | if (nip) { | |
855d23ce SW |
1385 | struct buffer_head *bh; |
1386 | error = gfs2_meta_inode_buffer(nip, &bh); | |
b3b94faa DT |
1387 | if (error) |
1388 | goto out_end_trans; | |
855d23ce SW |
1389 | error = gfs2_unlink_inode(ndip, ndentry, bh); |
1390 | brelse(bh); | |
b3b94faa DT |
1391 | } |
1392 | ||
1393 | if (dir_rename) { | |
8d123585 | 1394 | error = gfs2_dir_mvino(ip, &gfs2_qdotdot, ndip, DT_DIR); |
b3b94faa DT |
1395 | if (error) |
1396 | goto out_end_trans; | |
1397 | } else { | |
1398 | struct buffer_head *dibh; | |
1399 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1400 | if (error) | |
1401 | goto out_end_trans; | |
4bd91ba1 | 1402 | ip->i_inode.i_ctime = CURRENT_TIME; |
d4e9c4c3 | 1403 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
539e5d6b | 1404 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa DT |
1405 | brelse(dibh); |
1406 | } | |
1407 | ||
855d23ce | 1408 | error = gfs2_dir_del(odip, odentry); |
b3b94faa DT |
1409 | if (error) |
1410 | goto out_end_trans; | |
1411 | ||
3d6ecb7d | 1412 | error = gfs2_dir_add(ndir, &ndentry->d_name, ip); |
b3b94faa DT |
1413 | if (error) |
1414 | goto out_end_trans; | |
1415 | ||
feaa7bba | 1416 | out_end_trans: |
b3b94faa | 1417 | gfs2_trans_end(sdp); |
feaa7bba | 1418 | out_ipreserv: |
b3b94faa DT |
1419 | if (alloc_required) |
1420 | gfs2_inplace_release(ndip); | |
feaa7bba | 1421 | out_gunlock_q: |
b3b94faa DT |
1422 | if (alloc_required) |
1423 | gfs2_quota_unlock(ndip); | |
feaa7bba | 1424 | out_alloc: |
b3b94faa DT |
1425 | if (alloc_required) |
1426 | gfs2_alloc_put(ndip); | |
feaa7bba | 1427 | out_gunlock: |
72dbf479 BP |
1428 | while (x--) { |
1429 | gfs2_glock_dq(ghs + x); | |
b3b94faa | 1430 | gfs2_holder_uninit(ghs + x); |
72dbf479 | 1431 | } |
feaa7bba | 1432 | out_gunlock_r: |
0188d6c5 | 1433 | if (r_gh.gh_gl) |
b3b94faa | 1434 | gfs2_glock_dq_uninit(&r_gh); |
feaa7bba | 1435 | out: |
b3b94faa DT |
1436 | return error; |
1437 | } | |
1438 | ||
536baf02 | 1439 | /** |
c177c2ac AV |
1440 | * gfs2_follow_link - Follow a symbolic link |
1441 | * @dentry: The dentry of the link | |
1442 | * @nd: Data that we pass to vfs_follow_link() | |
536baf02 | 1443 | * |
c177c2ac | 1444 | * This can handle symlinks of any size. |
536baf02 | 1445 | * |
c177c2ac | 1446 | * Returns: 0 on success or error code |
536baf02 SW |
1447 | */ |
1448 | ||
c177c2ac | 1449 | static void *gfs2_follow_link(struct dentry *dentry, struct nameidata *nd) |
536baf02 | 1450 | { |
c177c2ac | 1451 | struct gfs2_inode *ip = GFS2_I(dentry->d_inode); |
536baf02 SW |
1452 | struct gfs2_holder i_gh; |
1453 | struct buffer_head *dibh; | |
160b4026 | 1454 | unsigned int size; |
c177c2ac | 1455 | char *buf; |
536baf02 SW |
1456 | int error; |
1457 | ||
1458 | gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh); | |
1459 | error = gfs2_glock_nq(&i_gh); | |
1460 | if (error) { | |
1461 | gfs2_holder_uninit(&i_gh); | |
c177c2ac AV |
1462 | nd_set_link(nd, ERR_PTR(error)); |
1463 | return NULL; | |
536baf02 SW |
1464 | } |
1465 | ||
a2e0f799 SW |
1466 | size = (unsigned int)i_size_read(&ip->i_inode); |
1467 | if (size == 0) { | |
536baf02 | 1468 | gfs2_consist_inode(ip); |
c177c2ac | 1469 | buf = ERR_PTR(-EIO); |
536baf02 SW |
1470 | goto out; |
1471 | } | |
1472 | ||
1473 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
c177c2ac AV |
1474 | if (error) { |
1475 | buf = ERR_PTR(error); | |
536baf02 | 1476 | goto out; |
536baf02 SW |
1477 | } |
1478 | ||
160b4026 | 1479 | buf = kzalloc(size + 1, GFP_NOFS); |
c177c2ac AV |
1480 | if (!buf) |
1481 | buf = ERR_PTR(-ENOMEM); | |
1482 | else | |
160b4026 | 1483 | memcpy(buf, dibh->b_data + sizeof(struct gfs2_dinode), size); |
536baf02 SW |
1484 | brelse(dibh); |
1485 | out: | |
1486 | gfs2_glock_dq_uninit(&i_gh); | |
c177c2ac AV |
1487 | nd_set_link(nd, buf); |
1488 | return NULL; | |
b3b94faa DT |
1489 | } |
1490 | ||
c177c2ac | 1491 | static void gfs2_put_link(struct dentry *dentry, struct nameidata *nd, void *p) |
b3b94faa | 1492 | { |
c177c2ac AV |
1493 | char *s = nd_get_link(nd); |
1494 | if (!IS_ERR(s)) | |
1495 | kfree(s); | |
b3b94faa DT |
1496 | } |
1497 | ||
1498 | /** | |
1499 | * gfs2_permission - | |
75d5cfbe SW |
1500 | * @inode: The inode |
1501 | * @mask: The mask to be tested | |
1502 | * @flags: Indicates whether this is an RCU path walk or not | |
b3b94faa | 1503 | * |
300c7d75 SW |
1504 | * This may be called from the VFS directly, or from within GFS2 with the |
1505 | * inode locked, so we look to see if the glock is already locked and only | |
1506 | * lock the glock if its not already been done. | |
1507 | * | |
b3b94faa DT |
1508 | * Returns: errno |
1509 | */ | |
1510 | ||
10556cb2 | 1511 | int gfs2_permission(struct inode *inode, int mask) |
b3b94faa | 1512 | { |
b74c79e9 | 1513 | struct gfs2_inode *ip; |
b3b94faa DT |
1514 | struct gfs2_holder i_gh; |
1515 | int error; | |
300c7d75 | 1516 | int unlock = 0; |
b3b94faa | 1517 | |
b74c79e9 NP |
1518 | |
1519 | ip = GFS2_I(inode); | |
7afd88d9 | 1520 | if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) { |
10556cb2 | 1521 | if (mask & MAY_NOT_BLOCK) |
75d5cfbe | 1522 | return -ECHILD; |
300c7d75 SW |
1523 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh); |
1524 | if (error) | |
1525 | return error; | |
1526 | unlock = 1; | |
1527 | } | |
b3b94faa | 1528 | |
f58ba889 MS |
1529 | if ((mask & MAY_WRITE) && IS_IMMUTABLE(inode)) |
1530 | error = -EACCES; | |
1531 | else | |
2830ba7f | 1532 | error = generic_permission(inode, mask); |
300c7d75 | 1533 | if (unlock) |
b3b94faa | 1534 | gfs2_glock_dq_uninit(&i_gh); |
b3b94faa DT |
1535 | |
1536 | return error; | |
1537 | } | |
1538 | ||
ab9bbda0 | 1539 | static int __gfs2_setattr_simple(struct inode *inode, struct iattr *attr) |
194c011f | 1540 | { |
194c011f SW |
1541 | setattr_copy(inode, attr); |
1542 | mark_inode_dirty(inode); | |
194c011f SW |
1543 | return 0; |
1544 | } | |
1545 | ||
1546 | /** | |
1547 | * gfs2_setattr_simple - | |
1548 | * @ip: | |
1549 | * @attr: | |
1550 | * | |
1551 | * Returns: errno | |
1552 | */ | |
1553 | ||
ab9bbda0 | 1554 | int gfs2_setattr_simple(struct inode *inode, struct iattr *attr) |
194c011f SW |
1555 | { |
1556 | int error; | |
1557 | ||
1558 | if (current->journal_info) | |
ab9bbda0 | 1559 | return __gfs2_setattr_simple(inode, attr); |
194c011f | 1560 | |
ab9bbda0 | 1561 | error = gfs2_trans_begin(GFS2_SB(inode), RES_DINODE, 0); |
194c011f SW |
1562 | if (error) |
1563 | return error; | |
1564 | ||
ab9bbda0 SW |
1565 | error = __gfs2_setattr_simple(inode, attr); |
1566 | gfs2_trans_end(GFS2_SB(inode)); | |
194c011f SW |
1567 | return error; |
1568 | } | |
1569 | ||
b3b94faa DT |
1570 | static int setattr_chown(struct inode *inode, struct iattr *attr) |
1571 | { | |
feaa7bba SW |
1572 | struct gfs2_inode *ip = GFS2_I(inode); |
1573 | struct gfs2_sbd *sdp = GFS2_SB(inode); | |
cd915493 | 1574 | u32 ouid, ogid, nuid, ngid; |
b3b94faa DT |
1575 | int error; |
1576 | ||
2933f925 SW |
1577 | ouid = inode->i_uid; |
1578 | ogid = inode->i_gid; | |
b3b94faa DT |
1579 | nuid = attr->ia_uid; |
1580 | ngid = attr->ia_gid; | |
1581 | ||
1582 | if (!(attr->ia_valid & ATTR_UID) || ouid == nuid) | |
1583 | ouid = nuid = NO_QUOTA_CHANGE; | |
1584 | if (!(attr->ia_valid & ATTR_GID) || ogid == ngid) | |
1585 | ogid = ngid = NO_QUOTA_CHANGE; | |
1586 | ||
182fe5ab CG |
1587 | if (!gfs2_alloc_get(ip)) |
1588 | return -ENOMEM; | |
b3b94faa DT |
1589 | |
1590 | error = gfs2_quota_lock(ip, nuid, ngid); | |
1591 | if (error) | |
1592 | goto out_alloc; | |
1593 | ||
1594 | if (ouid != NO_QUOTA_CHANGE || ogid != NO_QUOTA_CHANGE) { | |
1595 | error = gfs2_quota_check(ip, nuid, ngid); | |
1596 | if (error) | |
1597 | goto out_gunlock_q; | |
1598 | } | |
1599 | ||
1600 | error = gfs2_trans_begin(sdp, RES_DINODE + 2 * RES_QUOTA, 0); | |
1601 | if (error) | |
1602 | goto out_gunlock_q; | |
1603 | ||
ab9bbda0 | 1604 | error = gfs2_setattr_simple(inode, attr); |
b3b94faa DT |
1605 | if (error) |
1606 | goto out_end_trans; | |
1607 | ||
b3b94faa | 1608 | if (ouid != NO_QUOTA_CHANGE || ogid != NO_QUOTA_CHANGE) { |
77658aad SW |
1609 | u64 blocks = gfs2_get_inode_blocks(&ip->i_inode); |
1610 | gfs2_quota_change(ip, -blocks, ouid, ogid); | |
1611 | gfs2_quota_change(ip, blocks, nuid, ngid); | |
b3b94faa DT |
1612 | } |
1613 | ||
a91ea69f | 1614 | out_end_trans: |
b3b94faa | 1615 | gfs2_trans_end(sdp); |
a91ea69f | 1616 | out_gunlock_q: |
b3b94faa | 1617 | gfs2_quota_unlock(ip); |
a91ea69f | 1618 | out_alloc: |
b3b94faa | 1619 | gfs2_alloc_put(ip); |
b3b94faa DT |
1620 | return error; |
1621 | } | |
1622 | ||
1623 | /** | |
1624 | * gfs2_setattr - Change attributes on an inode | |
1625 | * @dentry: The dentry which is changing | |
1626 | * @attr: The structure describing the change | |
1627 | * | |
1628 | * The VFS layer wants to change one or more of an inodes attributes. Write | |
1629 | * that change out to disk. | |
1630 | * | |
1631 | * Returns: errno | |
1632 | */ | |
1633 | ||
1634 | static int gfs2_setattr(struct dentry *dentry, struct iattr *attr) | |
1635 | { | |
1636 | struct inode *inode = dentry->d_inode; | |
feaa7bba | 1637 | struct gfs2_inode *ip = GFS2_I(inode); |
b3b94faa DT |
1638 | struct gfs2_holder i_gh; |
1639 | int error; | |
1640 | ||
b3b94faa DT |
1641 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); |
1642 | if (error) | |
1643 | return error; | |
1644 | ||
1645 | error = -EPERM; | |
1646 | if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) | |
1647 | goto out; | |
1648 | ||
1649 | error = inode_change_ok(inode, attr); | |
1650 | if (error) | |
1651 | goto out; | |
1652 | ||
1653 | if (attr->ia_valid & ATTR_SIZE) | |
ff8f33c8 | 1654 | error = gfs2_setattr_size(inode, attr->ia_size); |
b3b94faa DT |
1655 | else if (attr->ia_valid & (ATTR_UID | ATTR_GID)) |
1656 | error = setattr_chown(inode, attr); | |
1657 | else if ((attr->ia_valid & ATTR_MODE) && IS_POSIXACL(inode)) | |
1658 | error = gfs2_acl_chmod(ip, attr); | |
1659 | else | |
ab9bbda0 | 1660 | error = gfs2_setattr_simple(inode, attr); |
b3b94faa | 1661 | |
a91ea69f | 1662 | out: |
b3b94faa DT |
1663 | if (!error) |
1664 | mark_inode_dirty(inode); | |
ab9bbda0 | 1665 | gfs2_glock_dq_uninit(&i_gh); |
b3b94faa DT |
1666 | return error; |
1667 | } | |
1668 | ||
1669 | /** | |
1670 | * gfs2_getattr - Read out an inode's attributes | |
26c1a574 | 1671 | * @mnt: The vfsmount the inode is being accessed from |
b3b94faa DT |
1672 | * @dentry: The dentry to stat |
1673 | * @stat: The inode's stats | |
1674 | * | |
dcf3dd85 SW |
1675 | * This may be called from the VFS directly, or from within GFS2 with the |
1676 | * inode locked, so we look to see if the glock is already locked and only | |
1677 | * lock the glock if its not already been done. Note that its the NFS | |
1678 | * readdirplus operation which causes this to be called (from filldir) | |
1679 | * with the glock already held. | |
1680 | * | |
b3b94faa DT |
1681 | * Returns: errno |
1682 | */ | |
1683 | ||
1684 | static int gfs2_getattr(struct vfsmount *mnt, struct dentry *dentry, | |
1685 | struct kstat *stat) | |
1686 | { | |
1687 | struct inode *inode = dentry->d_inode; | |
feaa7bba | 1688 | struct gfs2_inode *ip = GFS2_I(inode); |
b3b94faa DT |
1689 | struct gfs2_holder gh; |
1690 | int error; | |
dcf3dd85 | 1691 | int unlock = 0; |
b3b94faa | 1692 | |
7afd88d9 | 1693 | if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) { |
dcf3dd85 SW |
1694 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); |
1695 | if (error) | |
1696 | return error; | |
1697 | unlock = 1; | |
b3b94faa DT |
1698 | } |
1699 | ||
dcf3dd85 | 1700 | generic_fillattr(inode, stat); |
d7c103d0 | 1701 | if (unlock) |
dcf3dd85 SW |
1702 | gfs2_glock_dq_uninit(&gh); |
1703 | ||
1704 | return 0; | |
b3b94faa DT |
1705 | } |
1706 | ||
1707 | static int gfs2_setxattr(struct dentry *dentry, const char *name, | |
1708 | const void *data, size_t size, int flags) | |
1709 | { | |
feaa7bba | 1710 | struct inode *inode = dentry->d_inode; |
40b78a32 SW |
1711 | struct gfs2_inode *ip = GFS2_I(inode); |
1712 | struct gfs2_holder gh; | |
1713 | int ret; | |
b3b94faa | 1714 | |
40b78a32 SW |
1715 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); |
1716 | ret = gfs2_glock_nq(&gh); | |
1717 | if (ret == 0) { | |
1718 | ret = generic_setxattr(dentry, name, data, size, flags); | |
1719 | gfs2_glock_dq(&gh); | |
1720 | } | |
1721 | gfs2_holder_uninit(&gh); | |
1722 | return ret; | |
b3b94faa DT |
1723 | } |
1724 | ||
1725 | static ssize_t gfs2_getxattr(struct dentry *dentry, const char *name, | |
1726 | void *data, size_t size) | |
1727 | { | |
40b78a32 SW |
1728 | struct inode *inode = dentry->d_inode; |
1729 | struct gfs2_inode *ip = GFS2_I(inode); | |
1730 | struct gfs2_holder gh; | |
1731 | int ret; | |
b3b94faa | 1732 | |
40b78a32 SW |
1733 | gfs2_holder_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); |
1734 | ret = gfs2_glock_nq(&gh); | |
1735 | if (ret == 0) { | |
1736 | ret = generic_getxattr(dentry, name, data, size); | |
1737 | gfs2_glock_dq(&gh); | |
1738 | } | |
1739 | gfs2_holder_uninit(&gh); | |
1740 | return ret; | |
b3b94faa DT |
1741 | } |
1742 | ||
1743 | static int gfs2_removexattr(struct dentry *dentry, const char *name) | |
1744 | { | |
40b78a32 SW |
1745 | struct inode *inode = dentry->d_inode; |
1746 | struct gfs2_inode *ip = GFS2_I(inode); | |
1747 | struct gfs2_holder gh; | |
1748 | int ret; | |
b3b94faa | 1749 | |
40b78a32 SW |
1750 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); |
1751 | ret = gfs2_glock_nq(&gh); | |
1752 | if (ret == 0) { | |
1753 | ret = generic_removexattr(dentry, name); | |
1754 | gfs2_glock_dq(&gh); | |
1755 | } | |
1756 | gfs2_holder_uninit(&gh); | |
1757 | return ret; | |
b3b94faa DT |
1758 | } |
1759 | ||
e9079cce SW |
1760 | static int gfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, |
1761 | u64 start, u64 len) | |
1762 | { | |
1763 | struct gfs2_inode *ip = GFS2_I(inode); | |
1764 | struct gfs2_holder gh; | |
1765 | int ret; | |
1766 | ||
1767 | ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC); | |
1768 | if (ret) | |
1769 | return ret; | |
1770 | ||
1771 | mutex_lock(&inode->i_mutex); | |
1772 | ||
1773 | ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh); | |
1774 | if (ret) | |
1775 | goto out; | |
1776 | ||
1777 | if (gfs2_is_stuffed(ip)) { | |
1778 | u64 phys = ip->i_no_addr << inode->i_blkbits; | |
1779 | u64 size = i_size_read(inode); | |
1780 | u32 flags = FIEMAP_EXTENT_LAST|FIEMAP_EXTENT_NOT_ALIGNED| | |
1781 | FIEMAP_EXTENT_DATA_INLINE; | |
1782 | phys += sizeof(struct gfs2_dinode); | |
1783 | phys += start; | |
1784 | if (start + len > size) | |
1785 | len = size - start; | |
1786 | if (start < size) | |
1787 | ret = fiemap_fill_next_extent(fieinfo, start, phys, | |
1788 | len, flags); | |
1789 | if (ret == 1) | |
1790 | ret = 0; | |
1791 | } else { | |
1792 | ret = __generic_block_fiemap(inode, fieinfo, start, len, | |
1793 | gfs2_block_map); | |
1794 | } | |
1795 | ||
1796 | gfs2_glock_dq_uninit(&gh); | |
1797 | out: | |
1798 | mutex_unlock(&inode->i_mutex); | |
1799 | return ret; | |
1800 | } | |
1801 | ||
92e1d5be | 1802 | const struct inode_operations gfs2_file_iops = { |
e6305c43 | 1803 | .permission = gfs2_permission, |
b3b94faa DT |
1804 | .setattr = gfs2_setattr, |
1805 | .getattr = gfs2_getattr, | |
1806 | .setxattr = gfs2_setxattr, | |
1807 | .getxattr = gfs2_getxattr, | |
1808 | .listxattr = gfs2_listxattr, | |
1809 | .removexattr = gfs2_removexattr, | |
e9079cce | 1810 | .fiemap = gfs2_fiemap, |
4e34e719 | 1811 | .get_acl = gfs2_get_acl, |
b3b94faa DT |
1812 | }; |
1813 | ||
92e1d5be | 1814 | const struct inode_operations gfs2_dir_iops = { |
b3b94faa DT |
1815 | .create = gfs2_create, |
1816 | .lookup = gfs2_lookup, | |
1817 | .link = gfs2_link, | |
1818 | .unlink = gfs2_unlink, | |
1819 | .symlink = gfs2_symlink, | |
1820 | .mkdir = gfs2_mkdir, | |
855d23ce | 1821 | .rmdir = gfs2_unlink, |
b3b94faa DT |
1822 | .mknod = gfs2_mknod, |
1823 | .rename = gfs2_rename, | |
e6305c43 | 1824 | .permission = gfs2_permission, |
b3b94faa DT |
1825 | .setattr = gfs2_setattr, |
1826 | .getattr = gfs2_getattr, | |
1827 | .setxattr = gfs2_setxattr, | |
1828 | .getxattr = gfs2_getxattr, | |
1829 | .listxattr = gfs2_listxattr, | |
1830 | .removexattr = gfs2_removexattr, | |
e9079cce | 1831 | .fiemap = gfs2_fiemap, |
4e34e719 | 1832 | .get_acl = gfs2_get_acl, |
b3b94faa DT |
1833 | }; |
1834 | ||
92e1d5be | 1835 | const struct inode_operations gfs2_symlink_iops = { |
c177c2ac | 1836 | .readlink = generic_readlink, |
b3b94faa | 1837 | .follow_link = gfs2_follow_link, |
c177c2ac | 1838 | .put_link = gfs2_put_link, |
e6305c43 | 1839 | .permission = gfs2_permission, |
b3b94faa DT |
1840 | .setattr = gfs2_setattr, |
1841 | .getattr = gfs2_getattr, | |
1842 | .setxattr = gfs2_setxattr, | |
1843 | .getxattr = gfs2_getxattr, | |
1844 | .listxattr = gfs2_listxattr, | |
1845 | .removexattr = gfs2_removexattr, | |
e9079cce | 1846 | .fiemap = gfs2_fiemap, |
4e34e719 | 1847 | .get_acl = gfs2_get_acl, |
b3b94faa DT |
1848 | }; |
1849 |