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, | |
175a4eb7 | 336 | umode_t mode) |
194c011f SW |
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 | ||
175a4eb7 | 367 | static void munge_mode_uid_gid(struct gfs2_inode *dip, umode_t *mode, |
194c011f SW |
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; | |
6a8099ed | 392 | int dblocks = 1; |
194c011f | 393 | |
564e12b1 | 394 | error = gfs2_inplace_reserve(dip, RES_DINODE); |
194c011f SW |
395 | if (error) |
396 | goto out; | |
397 | ||
398 | error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_STATFS, 0); | |
399 | if (error) | |
400 | goto out_ipreserv; | |
401 | ||
6e87ed0f | 402 | error = gfs2_alloc_blocks(dip, no_addr, &dblocks, 1, generation); |
194c011f SW |
403 | |
404 | gfs2_trans_end(sdp); | |
405 | ||
406 | out_ipreserv: | |
407 | gfs2_inplace_release(dip); | |
408 | out: | |
194c011f SW |
409 | return error; |
410 | } | |
411 | ||
f2741d98 SW |
412 | static void gfs2_init_dir(struct buffer_head *dibh, |
413 | const struct gfs2_inode *parent) | |
e2d0a13b SW |
414 | { |
415 | struct gfs2_dinode *di = (struct gfs2_dinode *)dibh->b_data; | |
416 | struct gfs2_dirent *dent = (struct gfs2_dirent *)(di+1); | |
417 | ||
418 | gfs2_qstr2dirent(&gfs2_qdot, GFS2_DIRENT_SIZE(gfs2_qdot.len), dent); | |
419 | dent->de_inum = di->di_num; /* already GFS2 endian */ | |
420 | dent->de_type = cpu_to_be16(DT_DIR); | |
421 | ||
422 | dent = (struct gfs2_dirent *)((char*)dent + GFS2_DIRENT_SIZE(1)); | |
423 | gfs2_qstr2dirent(&gfs2_qdotdot, dibh->b_size - GFS2_DIRENT_SIZE(1) - sizeof(struct gfs2_dinode), dent); | |
424 | gfs2_inum_out(parent, dent); | |
425 | dent->de_type = cpu_to_be16(DT_DIR); | |
426 | ||
427 | } | |
428 | ||
194c011f SW |
429 | /** |
430 | * init_dinode - Fill in a new dinode structure | |
f2741d98 | 431 | * @dip: The directory this inode is being created in |
194c011f | 432 | * @gl: The glock covering the new inode |
f2741d98 SW |
433 | * @inum: The inode number |
434 | * @mode: The file permissions | |
435 | * @uid: The uid of the new inode | |
436 | * @gid: The gid of the new inode | |
437 | * @generation: The generation number of the new inode | |
438 | * @dev: The device number (if a device node) | |
439 | * @symname: The symlink destination (if a symlink) | |
440 | * @size: The inode size (ignored for directories) | |
441 | * @bhp: The buffer head (returned to caller) | |
194c011f SW |
442 | * |
443 | */ | |
444 | ||
445 | static void init_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl, | |
175a4eb7 | 446 | const struct gfs2_inum_host *inum, umode_t mode, |
194c011f | 447 | unsigned int uid, unsigned int gid, |
160b4026 SW |
448 | const u64 *generation, dev_t dev, const char *symname, |
449 | unsigned size, struct buffer_head **bhp) | |
194c011f SW |
450 | { |
451 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); | |
452 | struct gfs2_dinode *di; | |
453 | struct buffer_head *dibh; | |
454 | struct timespec tv = CURRENT_TIME; | |
455 | ||
456 | dibh = gfs2_meta_new(gl, inum->no_addr); | |
457 | gfs2_trans_add_bh(gl, dibh, 1); | |
458 | gfs2_metatype_set(dibh, GFS2_METATYPE_DI, GFS2_FORMAT_DI); | |
459 | gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode)); | |
460 | di = (struct gfs2_dinode *)dibh->b_data; | |
461 | ||
462 | di->di_num.no_formal_ino = cpu_to_be64(inum->no_formal_ino); | |
463 | di->di_num.no_addr = cpu_to_be64(inum->no_addr); | |
464 | di->di_mode = cpu_to_be32(mode); | |
465 | di->di_uid = cpu_to_be32(uid); | |
466 | di->di_gid = cpu_to_be32(gid); | |
467 | di->di_nlink = 0; | |
160b4026 | 468 | di->di_size = cpu_to_be64(size); |
194c011f SW |
469 | di->di_blocks = cpu_to_be64(1); |
470 | di->di_atime = di->di_mtime = di->di_ctime = cpu_to_be64(tv.tv_sec); | |
471 | di->di_major = cpu_to_be32(MAJOR(dev)); | |
472 | di->di_minor = cpu_to_be32(MINOR(dev)); | |
473 | di->di_goal_meta = di->di_goal_data = cpu_to_be64(inum->no_addr); | |
474 | di->di_generation = cpu_to_be64(*generation); | |
475 | di->di_flags = 0; | |
194c011f SW |
476 | di->__pad1 = 0; |
477 | di->di_payload_format = cpu_to_be32(S_ISDIR(mode) ? GFS2_FORMAT_DE : 0); | |
478 | di->di_height = 0; | |
479 | di->__pad2 = 0; | |
480 | di->__pad3 = 0; | |
481 | di->di_depth = 0; | |
482 | di->di_entries = 0; | |
483 | memset(&di->__pad4, 0, sizeof(di->__pad4)); | |
484 | di->di_eattr = 0; | |
485 | di->di_atime_nsec = cpu_to_be32(tv.tv_nsec); | |
486 | di->di_mtime_nsec = cpu_to_be32(tv.tv_nsec); | |
487 | di->di_ctime_nsec = cpu_to_be32(tv.tv_nsec); | |
488 | memset(&di->di_reserved, 0, sizeof(di->di_reserved)); | |
160b4026 SW |
489 | |
490 | switch(mode & S_IFMT) { | |
491 | case S_IFREG: | |
e2d0a13b SW |
492 | if ((dip->i_diskflags & GFS2_DIF_INHERIT_JDATA) || |
493 | gfs2_tune_get(sdp, gt_new_files_jdata)) | |
494 | di->di_flags |= cpu_to_be32(GFS2_DIF_JDATA); | |
160b4026 SW |
495 | break; |
496 | case S_IFDIR: | |
e2d0a13b SW |
497 | di->di_flags |= cpu_to_be32(dip->i_diskflags & |
498 | GFS2_DIF_INHERIT_JDATA); | |
499 | di->di_flags |= cpu_to_be32(GFS2_DIF_JDATA); | |
500 | di->di_size = cpu_to_be64(sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode)); | |
501 | di->di_entries = cpu_to_be32(2); | |
502 | gfs2_init_dir(dibh, dip); | |
160b4026 SW |
503 | break; |
504 | case S_IFLNK: | |
505 | memcpy(dibh->b_data + sizeof(struct gfs2_dinode), symname, size); | |
506 | break; | |
e2d0a13b SW |
507 | } |
508 | ||
194c011f SW |
509 | set_buffer_uptodate(dibh); |
510 | ||
511 | *bhp = dibh; | |
512 | } | |
513 | ||
514 | static int make_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl, | |
175a4eb7 | 515 | umode_t mode, const struct gfs2_inum_host *inum, |
160b4026 SW |
516 | const u64 *generation, dev_t dev, const char *symname, |
517 | unsigned int size, struct buffer_head **bhp) | |
194c011f SW |
518 | { |
519 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); | |
520 | unsigned int uid, gid; | |
521 | int error; | |
522 | ||
523 | munge_mode_uid_gid(dip, &mode, &uid, &gid); | |
564e12b1 | 524 | if (!gfs2_qadata_get(dip)) |
194c011f SW |
525 | return -ENOMEM; |
526 | ||
527 | error = gfs2_quota_lock(dip, uid, gid); | |
528 | if (error) | |
529 | goto out; | |
530 | ||
531 | error = gfs2_quota_check(dip, uid, gid); | |
532 | if (error) | |
533 | goto out_quota; | |
534 | ||
535 | error = gfs2_trans_begin(sdp, RES_DINODE + RES_QUOTA, 0); | |
536 | if (error) | |
537 | goto out_quota; | |
538 | ||
160b4026 | 539 | init_dinode(dip, gl, inum, mode, uid, gid, generation, dev, symname, size, bhp); |
194c011f SW |
540 | gfs2_quota_change(dip, +1, uid, gid); |
541 | gfs2_trans_end(sdp); | |
542 | ||
543 | out_quota: | |
544 | gfs2_quota_unlock(dip); | |
545 | out: | |
564e12b1 | 546 | gfs2_qadata_put(dip); |
194c011f SW |
547 | return error; |
548 | } | |
549 | ||
550 | static int link_dinode(struct gfs2_inode *dip, const struct qstr *name, | |
551 | struct gfs2_inode *ip) | |
552 | { | |
553 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); | |
564e12b1 | 554 | struct gfs2_qadata *qa; |
194c011f SW |
555 | int alloc_required; |
556 | struct buffer_head *dibh; | |
557 | int error; | |
558 | ||
564e12b1 BP |
559 | qa = gfs2_qadata_get(dip); |
560 | if (!qa) | |
194c011f SW |
561 | return -ENOMEM; |
562 | ||
563 | error = gfs2_quota_lock(dip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE); | |
564 | if (error) | |
565 | goto fail; | |
566 | ||
567 | error = alloc_required = gfs2_diradd_alloc_required(&dip->i_inode, name); | |
568 | if (alloc_required < 0) | |
569 | goto fail_quota_locks; | |
570 | if (alloc_required) { | |
571 | error = gfs2_quota_check(dip, dip->i_inode.i_uid, dip->i_inode.i_gid); | |
572 | if (error) | |
573 | goto fail_quota_locks; | |
574 | ||
564e12b1 | 575 | error = gfs2_inplace_reserve(dip, sdp->sd_max_dirres); |
194c011f SW |
576 | if (error) |
577 | goto fail_quota_locks; | |
578 | ||
579 | error = gfs2_trans_begin(sdp, sdp->sd_max_dirres + | |
54335b1f | 580 | dip->i_rgd->rd_length + |
194c011f SW |
581 | 2 * RES_DINODE + |
582 | RES_STATFS + RES_QUOTA, 0); | |
583 | if (error) | |
584 | goto fail_ipreserv; | |
585 | } else { | |
586 | error = gfs2_trans_begin(sdp, RES_LEAF + 2 * RES_DINODE, 0); | |
587 | if (error) | |
588 | goto fail_quota_locks; | |
589 | } | |
590 | ||
591 | error = gfs2_dir_add(&dip->i_inode, name, ip); | |
592 | if (error) | |
593 | goto fail_end_trans; | |
594 | ||
595 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
596 | if (error) | |
597 | goto fail_end_trans; | |
66ad863b | 598 | set_nlink(&ip->i_inode, S_ISDIR(ip->i_inode.i_mode) ? 2 : 1); |
194c011f SW |
599 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
600 | gfs2_dinode_out(ip, dibh->b_data); | |
601 | brelse(dibh); | |
602 | return 0; | |
603 | ||
604 | fail_end_trans: | |
605 | gfs2_trans_end(sdp); | |
606 | ||
607 | fail_ipreserv: | |
54335b1f | 608 | gfs2_inplace_release(dip); |
194c011f SW |
609 | |
610 | fail_quota_locks: | |
611 | gfs2_quota_unlock(dip); | |
612 | ||
613 | fail: | |
564e12b1 | 614 | gfs2_qadata_put(dip); |
194c011f SW |
615 | return error; |
616 | } | |
617 | ||
46cc1e5f | 618 | static int gfs2_initxattrs(struct inode *inode, const struct xattr *xattr_array, |
9d8f13ba | 619 | void *fs_info) |
194c011f | 620 | { |
9d8f13ba MZ |
621 | const struct xattr *xattr; |
622 | int err = 0; | |
623 | ||
624 | for (xattr = xattr_array; xattr->name != NULL; xattr++) { | |
625 | err = __gfs2_xattr_set(inode, xattr->name, xattr->value, | |
626 | xattr->value_len, 0, | |
627 | GFS2_EATYPE_SECURITY); | |
628 | if (err < 0) | |
629 | break; | |
194c011f | 630 | } |
194c011f SW |
631 | return err; |
632 | } | |
b3b94faa | 633 | |
9d8f13ba MZ |
634 | static int gfs2_security_init(struct gfs2_inode *dip, struct gfs2_inode *ip, |
635 | const struct qstr *qstr) | |
636 | { | |
637 | return security_inode_init_security(&ip->i_inode, &dip->i_inode, qstr, | |
638 | &gfs2_initxattrs, NULL); | |
639 | } | |
640 | ||
194c011f | 641 | /** |
f2741d98 SW |
642 | * gfs2_create_inode - Create a new inode |
643 | * @dir: The parent directory | |
644 | * @dentry: The new dentry | |
645 | * @mode: The permissions on the new inode | |
646 | * @dev: For device nodes, this is the device number | |
647 | * @symname: For symlinks, this is the link destination | |
648 | * @size: The initial size of the inode (ignored for directories) | |
194c011f | 649 | * |
f2741d98 | 650 | * Returns: 0 on success, or error code |
194c011f SW |
651 | */ |
652 | ||
f2741d98 | 653 | static int gfs2_create_inode(struct inode *dir, struct dentry *dentry, |
175a4eb7 | 654 | umode_t mode, dev_t dev, const char *symname, |
9a63edd1 | 655 | unsigned int size, int excl) |
194c011f | 656 | { |
f2741d98 SW |
657 | const struct qstr *name = &dentry->d_name; |
658 | struct gfs2_holder ghs[2]; | |
194c011f | 659 | struct inode *inode = NULL; |
f2741d98 | 660 | struct gfs2_inode *dip = GFS2_I(dir); |
194c011f SW |
661 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); |
662 | struct gfs2_inum_host inum = { .no_addr = 0, .no_formal_ino = 0 }; | |
663 | int error; | |
664 | u64 generation; | |
665 | struct buffer_head *bh = NULL; | |
666 | ||
667 | if (!name->len || name->len > GFS2_FNAMESIZE) | |
f2741d98 | 668 | return -ENAMETOOLONG; |
194c011f | 669 | |
f2741d98 | 670 | error = gfs2_glock_nq_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); |
194c011f SW |
671 | if (error) |
672 | goto fail; | |
673 | ||
674 | error = create_ok(dip, name, mode); | |
9a63edd1 SW |
675 | if ((error == -EEXIST) && S_ISREG(mode) && !excl) { |
676 | inode = gfs2_lookupi(dir, &dentry->d_name, 0); | |
677 | gfs2_glock_dq_uninit(ghs); | |
678 | d_instantiate(dentry, inode); | |
679 | return IS_ERR(inode) ? PTR_ERR(inode) : 0; | |
680 | } | |
194c011f SW |
681 | if (error) |
682 | goto fail_gunlock; | |
683 | ||
684 | error = alloc_dinode(dip, &inum.no_addr, &generation); | |
685 | if (error) | |
686 | goto fail_gunlock; | |
687 | inum.no_formal_ino = generation; | |
688 | ||
689 | error = gfs2_glock_nq_num(sdp, inum.no_addr, &gfs2_inode_glops, | |
690 | LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1); | |
691 | if (error) | |
692 | goto fail_gunlock; | |
693 | ||
160b4026 | 694 | error = make_dinode(dip, ghs[1].gh_gl, mode, &inum, &generation, dev, symname, size, &bh); |
194c011f SW |
695 | if (error) |
696 | goto fail_gunlock2; | |
697 | ||
698 | inode = gfs2_inode_lookup(dir->i_sb, IF2DT(mode), inum.no_addr, | |
699 | inum.no_formal_ino, 0); | |
700 | if (IS_ERR(inode)) | |
701 | goto fail_gunlock2; | |
702 | ||
703 | error = gfs2_inode_refresh(GFS2_I(inode)); | |
704 | if (error) | |
705 | goto fail_gunlock2; | |
706 | ||
707 | error = gfs2_acl_create(dip, inode); | |
708 | if (error) | |
709 | goto fail_gunlock2; | |
710 | ||
711 | error = gfs2_security_init(dip, GFS2_I(inode), name); | |
712 | if (error) | |
713 | goto fail_gunlock2; | |
714 | ||
715 | error = link_dinode(dip, name, GFS2_I(inode)); | |
716 | if (error) | |
717 | goto fail_gunlock2; | |
718 | ||
719 | if (bh) | |
720 | brelse(bh); | |
f2741d98 SW |
721 | |
722 | gfs2_trans_end(sdp); | |
564e12b1 BP |
723 | /* Check if we reserved space in the rgrp. Function link_dinode may |
724 | not, depending on whether alloc is required. */ | |
725 | if (dip->i_res) | |
726 | gfs2_inplace_release(dip); | |
f2741d98 | 727 | gfs2_quota_unlock(dip); |
564e12b1 | 728 | gfs2_qadata_put(dip); |
f2741d98 | 729 | mark_inode_dirty(inode); |
ab9bbda0 | 730 | gfs2_glock_dq_uninit_m(2, ghs); |
f2741d98 SW |
731 | d_instantiate(dentry, inode); |
732 | return 0; | |
194c011f SW |
733 | |
734 | fail_gunlock2: | |
735 | gfs2_glock_dq_uninit(ghs + 1); | |
194c011f | 736 | fail_gunlock: |
f2741d98 | 737 | gfs2_glock_dq_uninit(ghs); |
40ac218f SW |
738 | if (inode && !IS_ERR(inode)) { |
739 | set_bit(GIF_ALLOC_FAILED, &GFS2_I(inode)->i_flags); | |
740 | iput(inode); | |
741 | } | |
194c011f SW |
742 | fail: |
743 | if (bh) | |
744 | brelse(bh); | |
f2741d98 | 745 | return error; |
194c011f | 746 | } |
f2741d98 | 747 | |
b3b94faa DT |
748 | /** |
749 | * gfs2_create - Create a file | |
750 | * @dir: The directory in which to create the file | |
751 | * @dentry: The dentry of the new file | |
752 | * @mode: The mode of the new file | |
753 | * | |
754 | * Returns: errno | |
755 | */ | |
756 | ||
757 | static int gfs2_create(struct inode *dir, struct dentry *dentry, | |
ebfc3b49 | 758 | umode_t mode, bool excl) |
b3b94faa | 759 | { |
9a63edd1 | 760 | return gfs2_create_inode(dir, dentry, S_IFREG | mode, 0, NULL, 0, excl); |
b3b94faa DT |
761 | } |
762 | ||
763 | /** | |
764 | * gfs2_lookup - Look up a filename in a directory and return its inode | |
765 | * @dir: The directory inode | |
766 | * @dentry: The dentry of the new inode | |
767 | * @nd: passed from Linux VFS, ignored by us | |
768 | * | |
769 | * Called by the VFS layer. Lock dir and call gfs2_lookupi() | |
770 | * | |
771 | * Returns: errno | |
772 | */ | |
773 | ||
774 | static struct dentry *gfs2_lookup(struct inode *dir, struct dentry *dentry, | |
00cd8dd3 | 775 | unsigned int flags) |
b3b94faa | 776 | { |
6c673ab3 AV |
777 | struct inode *inode = gfs2_lookupi(dir, &dentry->d_name, 0); |
778 | if (inode && !IS_ERR(inode)) { | |
9656b2c1 SW |
779 | struct gfs2_glock *gl = GFS2_I(inode)->i_gl; |
780 | struct gfs2_holder gh; | |
781 | int error; | |
782 | error = gfs2_glock_nq_init(gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); | |
783 | if (error) { | |
784 | iput(inode); | |
785 | return ERR_PTR(error); | |
786 | } | |
787 | gfs2_glock_dq_uninit(&gh); | |
9656b2c1 | 788 | } |
6c673ab3 | 789 | return d_splice_alias(inode, dentry); |
b3b94faa DT |
790 | } |
791 | ||
792 | /** | |
793 | * gfs2_link - Link to a file | |
794 | * @old_dentry: The inode to link | |
795 | * @dir: Add link to this directory | |
796 | * @dentry: The name of the link | |
797 | * | |
798 | * Link the inode in "old_dentry" into the directory "dir" with the | |
799 | * name in "dentry". | |
800 | * | |
801 | * Returns: errno | |
802 | */ | |
803 | ||
804 | static int gfs2_link(struct dentry *old_dentry, struct inode *dir, | |
805 | struct dentry *dentry) | |
806 | { | |
feaa7bba SW |
807 | struct gfs2_inode *dip = GFS2_I(dir); |
808 | struct gfs2_sbd *sdp = GFS2_SB(dir); | |
b3b94faa | 809 | struct inode *inode = old_dentry->d_inode; |
feaa7bba | 810 | struct gfs2_inode *ip = GFS2_I(inode); |
b3b94faa | 811 | struct gfs2_holder ghs[2]; |
2baee03f | 812 | struct buffer_head *dibh; |
b3b94faa DT |
813 | int alloc_required; |
814 | int error; | |
815 | ||
b60623c2 | 816 | if (S_ISDIR(inode->i_mode)) |
b3b94faa DT |
817 | return -EPERM; |
818 | ||
819 | gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); | |
820 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); | |
821 | ||
72dbf479 BP |
822 | error = gfs2_glock_nq(ghs); /* parent */ |
823 | if (error) | |
824 | goto out_parent; | |
825 | ||
826 | error = gfs2_glock_nq(ghs + 1); /* child */ | |
b3b94faa | 827 | if (error) |
72dbf479 | 828 | goto out_child; |
b3b94faa | 829 | |
d192a8e5 SW |
830 | error = -ENOENT; |
831 | if (inode->i_nlink == 0) | |
832 | goto out_gunlock; | |
833 | ||
10556cb2 | 834 | error = gfs2_permission(dir, MAY_WRITE | MAY_EXEC); |
b3b94faa DT |
835 | if (error) |
836 | goto out_gunlock; | |
837 | ||
dbb7cae2 | 838 | error = gfs2_dir_check(dir, &dentry->d_name, NULL); |
b3b94faa DT |
839 | switch (error) { |
840 | case -ENOENT: | |
841 | break; | |
842 | case 0: | |
843 | error = -EEXIST; | |
844 | default: | |
845 | goto out_gunlock; | |
846 | } | |
847 | ||
848 | error = -EINVAL; | |
4f56110a | 849 | if (!dip->i_inode.i_nlink) |
b3b94faa DT |
850 | goto out_gunlock; |
851 | error = -EFBIG; | |
ad6203f2 | 852 | if (dip->i_entries == (u32)-1) |
b3b94faa DT |
853 | goto out_gunlock; |
854 | error = -EPERM; | |
855 | if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) | |
856 | goto out_gunlock; | |
857 | error = -EINVAL; | |
4f56110a | 858 | if (!ip->i_inode.i_nlink) |
b3b94faa DT |
859 | goto out_gunlock; |
860 | error = -EMLINK; | |
4f56110a | 861 | if (ip->i_inode.i_nlink == (u32)-1) |
b3b94faa DT |
862 | goto out_gunlock; |
863 | ||
c752666c SW |
864 | alloc_required = error = gfs2_diradd_alloc_required(dir, &dentry->d_name); |
865 | if (error < 0) | |
b3b94faa | 866 | goto out_gunlock; |
c752666c | 867 | error = 0; |
b3b94faa DT |
868 | |
869 | if (alloc_required) { | |
564e12b1 BP |
870 | struct gfs2_qadata *qa = gfs2_qadata_get(dip); |
871 | ||
872 | if (!qa) { | |
182fe5ab CG |
873 | error = -ENOMEM; |
874 | goto out_gunlock; | |
875 | } | |
b3b94faa | 876 | |
d82661d9 | 877 | error = gfs2_quota_lock_check(dip); |
b3b94faa DT |
878 | if (error) |
879 | goto out_alloc; | |
880 | ||
564e12b1 | 881 | error = gfs2_inplace_reserve(dip, sdp->sd_max_dirres); |
b3b94faa DT |
882 | if (error) |
883 | goto out_gunlock_q; | |
884 | ||
1b50259b | 885 | error = gfs2_trans_begin(sdp, sdp->sd_max_dirres + |
54335b1f | 886 | gfs2_rg_blocks(dip) + |
b3b94faa DT |
887 | 2 * RES_DINODE + RES_STATFS + |
888 | RES_QUOTA, 0); | |
889 | if (error) | |
890 | goto out_ipres; | |
891 | } else { | |
892 | error = gfs2_trans_begin(sdp, 2 * RES_DINODE + RES_LEAF, 0); | |
893 | if (error) | |
894 | goto out_ipres; | |
895 | } | |
896 | ||
2baee03f | 897 | error = gfs2_meta_inode_buffer(ip, &dibh); |
b3b94faa DT |
898 | if (error) |
899 | goto out_end_trans; | |
900 | ||
3d6ecb7d | 901 | error = gfs2_dir_add(dir, &dentry->d_name, ip); |
2baee03f SW |
902 | if (error) |
903 | goto out_brelse; | |
904 | ||
905 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); | |
906 | inc_nlink(&ip->i_inode); | |
907 | ip->i_inode.i_ctime = CURRENT_TIME; | |
ab9bbda0 SW |
908 | ihold(inode); |
909 | d_instantiate(dentry, inode); | |
910 | mark_inode_dirty(inode); | |
b3b94faa | 911 | |
2baee03f SW |
912 | out_brelse: |
913 | brelse(dibh); | |
feaa7bba | 914 | out_end_trans: |
b3b94faa | 915 | gfs2_trans_end(sdp); |
feaa7bba | 916 | out_ipres: |
b3b94faa DT |
917 | if (alloc_required) |
918 | gfs2_inplace_release(dip); | |
feaa7bba | 919 | out_gunlock_q: |
b3b94faa DT |
920 | if (alloc_required) |
921 | gfs2_quota_unlock(dip); | |
feaa7bba | 922 | out_alloc: |
b3b94faa | 923 | if (alloc_required) |
564e12b1 | 924 | gfs2_qadata_put(dip); |
feaa7bba | 925 | out_gunlock: |
72dbf479 BP |
926 | gfs2_glock_dq(ghs + 1); |
927 | out_child: | |
928 | gfs2_glock_dq(ghs); | |
929 | out_parent: | |
b3b94faa DT |
930 | gfs2_holder_uninit(ghs); |
931 | gfs2_holder_uninit(ghs + 1); | |
b3b94faa DT |
932 | return error; |
933 | } | |
934 | ||
87ec2174 SW |
935 | /* |
936 | * gfs2_unlink_ok - check to see that a inode is still in a directory | |
937 | * @dip: the directory | |
938 | * @name: the name of the file | |
939 | * @ip: the inode | |
940 | * | |
941 | * Assumes that the lock on (at least) @dip is held. | |
942 | * | |
943 | * Returns: 0 if the parent/child relationship is correct, errno if it isn't | |
944 | */ | |
945 | ||
946 | static int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name, | |
947 | const struct gfs2_inode *ip) | |
948 | { | |
949 | int error; | |
950 | ||
951 | if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode)) | |
952 | return -EPERM; | |
953 | ||
954 | if ((dip->i_inode.i_mode & S_ISVTX) && | |
955 | dip->i_inode.i_uid != current_fsuid() && | |
956 | ip->i_inode.i_uid != current_fsuid() && !capable(CAP_FOWNER)) | |
957 | return -EPERM; | |
958 | ||
959 | if (IS_APPEND(&dip->i_inode)) | |
960 | return -EPERM; | |
961 | ||
10556cb2 | 962 | error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC); |
87ec2174 SW |
963 | if (error) |
964 | return error; | |
965 | ||
966 | error = gfs2_dir_check(&dip->i_inode, name, ip); | |
967 | if (error) | |
968 | return error; | |
969 | ||
970 | return 0; | |
971 | } | |
972 | ||
b3b94faa | 973 | /** |
855d23ce SW |
974 | * gfs2_unlink_inode - Removes an inode from its parent dir and unlinks it |
975 | * @dip: The parent directory | |
976 | * @name: The name of the entry in the parent directory | |
977 | * @bh: The inode buffer for the inode to be removed | |
978 | * @inode: The inode to be removed | |
979 | * | |
980 | * Called with all the locks and in a transaction. This will only be | |
981 | * called for a directory after it has been checked to ensure it is empty. | |
982 | * | |
983 | * Returns: 0 on success, or an error | |
984 | */ | |
985 | ||
986 | static int gfs2_unlink_inode(struct gfs2_inode *dip, | |
987 | const struct dentry *dentry, | |
988 | struct buffer_head *bh) | |
989 | { | |
990 | struct inode *inode = dentry->d_inode; | |
991 | struct gfs2_inode *ip = GFS2_I(inode); | |
992 | int error; | |
993 | ||
994 | error = gfs2_dir_del(dip, dentry); | |
995 | if (error) | |
996 | return error; | |
997 | ||
998 | ip->i_entries = 0; | |
999 | inode->i_ctime = CURRENT_TIME; | |
1000 | if (S_ISDIR(inode->i_mode)) | |
1001 | clear_nlink(inode); | |
1002 | else | |
1003 | drop_nlink(inode); | |
855d23ce SW |
1004 | mark_inode_dirty(inode); |
1005 | if (inode->i_nlink == 0) | |
1006 | gfs2_unlink_di(inode); | |
1007 | return 0; | |
1008 | } | |
1009 | ||
1010 | ||
1011 | /** | |
1012 | * gfs2_unlink - Unlink an inode (this does rmdir as well) | |
1013 | * @dir: The inode of the directory containing the inode to unlink | |
b3b94faa DT |
1014 | * @dentry: The file itself |
1015 | * | |
855d23ce SW |
1016 | * This routine uses the type of the inode as a flag to figure out |
1017 | * whether this is an unlink or an rmdir. | |
b3b94faa DT |
1018 | * |
1019 | * Returns: errno | |
1020 | */ | |
1021 | ||
1022 | static int gfs2_unlink(struct inode *dir, struct dentry *dentry) | |
1023 | { | |
feaa7bba SW |
1024 | struct gfs2_inode *dip = GFS2_I(dir); |
1025 | struct gfs2_sbd *sdp = GFS2_SB(dir); | |
855d23ce SW |
1026 | struct inode *inode = dentry->d_inode; |
1027 | struct gfs2_inode *ip = GFS2_I(inode); | |
1028 | struct buffer_head *bh; | |
ddee7608 RC |
1029 | struct gfs2_holder ghs[3]; |
1030 | struct gfs2_rgrpd *rgd; | |
5e2f7d61 BP |
1031 | int error; |
1032 | ||
1033 | error = gfs2_rindex_update(sdp); | |
1034 | if (error) | |
1035 | return error; | |
1036 | ||
1037 | error = -EROFS; | |
b3b94faa | 1038 | |
b3b94faa | 1039 | gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); |
ddee7608 | 1040 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); |
b3b94faa | 1041 | |
66fc061b | 1042 | rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr, 1); |
a365fbf3 | 1043 | if (!rgd) |
87654896 | 1044 | goto out_inodes; |
a365fbf3 | 1045 | |
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: | |
8497a46e SW |
1091 | gfs2_glock_dq(ghs + 1); |
1092 | out_child: | |
8497a46e SW |
1093 | gfs2_glock_dq(ghs); |
1094 | out_parent: | |
87654896 SW |
1095 | gfs2_holder_uninit(ghs + 2); |
1096 | out_inodes: | |
1097 | gfs2_holder_uninit(ghs + 1); | |
8497a46e | 1098 | gfs2_holder_uninit(ghs); |
b3b94faa DT |
1099 | return error; |
1100 | } | |
1101 | ||
1102 | /** | |
1103 | * gfs2_symlink - Create a symlink | |
1104 | * @dir: The directory to create the symlink in | |
1105 | * @dentry: The dentry to put the symlink in | |
1106 | * @symname: The thing which the link points to | |
1107 | * | |
1108 | * Returns: errno | |
1109 | */ | |
1110 | ||
1111 | static int gfs2_symlink(struct inode *dir, struct dentry *dentry, | |
1112 | const char *symname) | |
1113 | { | |
feaa7bba | 1114 | struct gfs2_sbd *sdp = GFS2_SB(dir); |
160b4026 | 1115 | unsigned int size; |
b3b94faa | 1116 | |
b3b94faa DT |
1117 | size = strlen(symname); |
1118 | if (size > sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode) - 1) | |
1119 | return -ENAMETOOLONG; | |
1120 | ||
9a63edd1 | 1121 | return gfs2_create_inode(dir, dentry, S_IFLNK | S_IRWXUGO, 0, symname, size, 0); |
b3b94faa DT |
1122 | } |
1123 | ||
1124 | /** | |
1125 | * gfs2_mkdir - Make a directory | |
1126 | * @dir: The parent directory of the new one | |
1127 | * @dentry: The dentry of the new directory | |
1128 | * @mode: The mode of the new directory | |
1129 | * | |
1130 | * Returns: errno | |
1131 | */ | |
1132 | ||
18bb1db3 | 1133 | static int gfs2_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) |
b3b94faa | 1134 | { |
9a63edd1 | 1135 | return gfs2_create_inode(dir, dentry, S_IFDIR | mode, 0, NULL, 0, 0); |
b3b94faa DT |
1136 | } |
1137 | ||
b3b94faa DT |
1138 | /** |
1139 | * gfs2_mknod - Make a special file | |
1140 | * @dir: The directory in which the special file will reside | |
1141 | * @dentry: The dentry of the special file | |
1142 | * @mode: The mode of the special file | |
f2741d98 | 1143 | * @dev: The device specification of the special file |
b3b94faa DT |
1144 | * |
1145 | */ | |
1146 | ||
1a67aafb | 1147 | static int gfs2_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, |
b3b94faa DT |
1148 | dev_t dev) |
1149 | { | |
9a63edd1 | 1150 | return gfs2_create_inode(dir, dentry, mode, dev, NULL, 0, 0); |
b3b94faa DT |
1151 | } |
1152 | ||
0188d6c5 SW |
1153 | /* |
1154 | * gfs2_ok_to_move - check if it's ok to move a directory to another directory | |
1155 | * @this: move this | |
1156 | * @to: to here | |
1157 | * | |
1158 | * Follow @to back to the root and make sure we don't encounter @this | |
1159 | * Assumes we already hold the rename lock. | |
1160 | * | |
1161 | * Returns: errno | |
1162 | */ | |
1163 | ||
1164 | static int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to) | |
1165 | { | |
1166 | struct inode *dir = &to->i_inode; | |
1167 | struct super_block *sb = dir->i_sb; | |
1168 | struct inode *tmp; | |
0188d6c5 SW |
1169 | int error = 0; |
1170 | ||
0188d6c5 SW |
1171 | igrab(dir); |
1172 | ||
1173 | for (;;) { | |
1174 | if (dir == &this->i_inode) { | |
1175 | error = -EINVAL; | |
1176 | break; | |
1177 | } | |
1178 | if (dir == sb->s_root->d_inode) { | |
1179 | error = 0; | |
1180 | break; | |
1181 | } | |
1182 | ||
8d123585 | 1183 | tmp = gfs2_lookupi(dir, &gfs2_qdotdot, 1); |
0188d6c5 SW |
1184 | if (IS_ERR(tmp)) { |
1185 | error = PTR_ERR(tmp); | |
1186 | break; | |
1187 | } | |
1188 | ||
1189 | iput(dir); | |
1190 | dir = tmp; | |
1191 | } | |
1192 | ||
1193 | iput(dir); | |
1194 | ||
1195 | return error; | |
1196 | } | |
1197 | ||
b3b94faa DT |
1198 | /** |
1199 | * gfs2_rename - Rename a file | |
1200 | * @odir: Parent directory of old file name | |
1201 | * @odentry: The old dentry of the file | |
1202 | * @ndir: Parent directory of new file name | |
1203 | * @ndentry: The new dentry of the file | |
1204 | * | |
1205 | * Returns: errno | |
1206 | */ | |
1207 | ||
1208 | static int gfs2_rename(struct inode *odir, struct dentry *odentry, | |
1209 | struct inode *ndir, struct dentry *ndentry) | |
1210 | { | |
feaa7bba SW |
1211 | struct gfs2_inode *odip = GFS2_I(odir); |
1212 | struct gfs2_inode *ndip = GFS2_I(ndir); | |
1213 | struct gfs2_inode *ip = GFS2_I(odentry->d_inode); | |
b3b94faa | 1214 | struct gfs2_inode *nip = NULL; |
feaa7bba | 1215 | struct gfs2_sbd *sdp = GFS2_SB(odir); |
8339ee54 | 1216 | struct gfs2_holder ghs[5], r_gh = { .gh_gl = NULL, }; |
ddee7608 | 1217 | struct gfs2_rgrpd *nrgd; |
b3b94faa DT |
1218 | unsigned int num_gh; |
1219 | int dir_rename = 0; | |
24b977b5 | 1220 | int alloc_required = 0; |
b3b94faa DT |
1221 | unsigned int x; |
1222 | int error; | |
1223 | ||
b3b94faa | 1224 | if (ndentry->d_inode) { |
feaa7bba | 1225 | nip = GFS2_I(ndentry->d_inode); |
b3b94faa DT |
1226 | if (ip == nip) |
1227 | return 0; | |
1228 | } | |
1229 | ||
5e2f7d61 BP |
1230 | error = gfs2_rindex_update(sdp); |
1231 | if (error) | |
1232 | return error; | |
1233 | ||
0188d6c5 SW |
1234 | if (odip != ndip) { |
1235 | error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE, | |
1236 | 0, &r_gh); | |
b3b94faa DT |
1237 | if (error) |
1238 | goto out; | |
1239 | ||
0188d6c5 SW |
1240 | if (S_ISDIR(ip->i_inode.i_mode)) { |
1241 | dir_rename = 1; | |
1242 | /* don't move a dirctory into it's subdir */ | |
1243 | error = gfs2_ok_to_move(ip, ndip); | |
1244 | if (error) | |
1245 | goto out_gunlock_r; | |
1246 | } | |
b3b94faa DT |
1247 | } |
1248 | ||
d9d1ca30 | 1249 | num_gh = 1; |
b3b94faa | 1250 | gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); |
d9d1ca30 SW |
1251 | if (odip != ndip) { |
1252 | gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); | |
1253 | num_gh++; | |
1254 | } | |
1255 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); | |
1256 | num_gh++; | |
b3b94faa | 1257 | |
d9d1ca30 SW |
1258 | if (nip) { |
1259 | gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); | |
1260 | num_gh++; | |
ddee7608 RC |
1261 | /* grab the resource lock for unlink flag twiddling |
1262 | * this is the case of the target file already existing | |
1263 | * so we unlink before doing the rename | |
1264 | */ | |
66fc061b | 1265 | nrgd = gfs2_blk2rgrpd(sdp, nip->i_no_addr, 1); |
ddee7608 RC |
1266 | if (nrgd) |
1267 | gfs2_holder_init(nrgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh++); | |
d9d1ca30 | 1268 | } |
b3b94faa | 1269 | |
72dbf479 BP |
1270 | for (x = 0; x < num_gh; x++) { |
1271 | error = gfs2_glock_nq(ghs + x); | |
1272 | if (error) | |
1273 | goto out_gunlock; | |
1274 | } | |
b3b94faa | 1275 | |
d192a8e5 SW |
1276 | error = -ENOENT; |
1277 | if (ip->i_inode.i_nlink == 0) | |
1278 | goto out_gunlock; | |
1279 | ||
b3b94faa DT |
1280 | /* Check out the old directory */ |
1281 | ||
1282 | error = gfs2_unlink_ok(odip, &odentry->d_name, ip); | |
1283 | if (error) | |
1284 | goto out_gunlock; | |
1285 | ||
1286 | /* Check out the new directory */ | |
1287 | ||
1288 | if (nip) { | |
1289 | error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip); | |
1290 | if (error) | |
1291 | goto out_gunlock; | |
1292 | ||
d192a8e5 SW |
1293 | if (nip->i_inode.i_nlink == 0) { |
1294 | error = -EAGAIN; | |
1295 | goto out_gunlock; | |
1296 | } | |
1297 | ||
b60623c2 | 1298 | if (S_ISDIR(nip->i_inode.i_mode)) { |
ad6203f2 | 1299 | if (nip->i_entries < 2) { |
94fb763b | 1300 | gfs2_consist_inode(nip); |
b3b94faa DT |
1301 | error = -EIO; |
1302 | goto out_gunlock; | |
1303 | } | |
ad6203f2 | 1304 | if (nip->i_entries > 2) { |
b3b94faa DT |
1305 | error = -ENOTEMPTY; |
1306 | goto out_gunlock; | |
1307 | } | |
1308 | } | |
1309 | } else { | |
10556cb2 | 1310 | error = gfs2_permission(ndir, MAY_WRITE | MAY_EXEC); |
b3b94faa DT |
1311 | if (error) |
1312 | goto out_gunlock; | |
1313 | ||
dbb7cae2 | 1314 | error = gfs2_dir_check(ndir, &ndentry->d_name, NULL); |
b3b94faa DT |
1315 | switch (error) { |
1316 | case -ENOENT: | |
1317 | error = 0; | |
1318 | break; | |
1319 | case 0: | |
1320 | error = -EEXIST; | |
1321 | default: | |
1322 | goto out_gunlock; | |
1323 | }; | |
1324 | ||
1325 | if (odip != ndip) { | |
4f56110a | 1326 | if (!ndip->i_inode.i_nlink) { |
d192a8e5 | 1327 | error = -ENOENT; |
b3b94faa DT |
1328 | goto out_gunlock; |
1329 | } | |
ad6203f2 | 1330 | if (ndip->i_entries == (u32)-1) { |
b3b94faa DT |
1331 | error = -EFBIG; |
1332 | goto out_gunlock; | |
1333 | } | |
b60623c2 | 1334 | if (S_ISDIR(ip->i_inode.i_mode) && |
4f56110a | 1335 | ndip->i_inode.i_nlink == (u32)-1) { |
b3b94faa DT |
1336 | error = -EMLINK; |
1337 | goto out_gunlock; | |
1338 | } | |
1339 | } | |
1340 | } | |
1341 | ||
1342 | /* Check out the dir to be renamed */ | |
1343 | ||
1344 | if (dir_rename) { | |
10556cb2 | 1345 | error = gfs2_permission(odentry->d_inode, MAY_WRITE); |
b3b94faa DT |
1346 | if (error) |
1347 | goto out_gunlock; | |
1348 | } | |
1349 | ||
24b977b5 SW |
1350 | if (nip == NULL) |
1351 | alloc_required = gfs2_diradd_alloc_required(ndir, &ndentry->d_name); | |
1352 | error = alloc_required; | |
c752666c | 1353 | if (error < 0) |
b3b94faa DT |
1354 | goto out_gunlock; |
1355 | ||
1356 | if (alloc_required) { | |
564e12b1 BP |
1357 | struct gfs2_qadata *qa = gfs2_qadata_get(ndip); |
1358 | ||
1359 | if (!qa) { | |
182fe5ab CG |
1360 | error = -ENOMEM; |
1361 | goto out_gunlock; | |
1362 | } | |
b3b94faa | 1363 | |
d82661d9 | 1364 | error = gfs2_quota_lock_check(ndip); |
b3b94faa DT |
1365 | if (error) |
1366 | goto out_alloc; | |
1367 | ||
564e12b1 | 1368 | error = gfs2_inplace_reserve(ndip, sdp->sd_max_dirres); |
b3b94faa DT |
1369 | if (error) |
1370 | goto out_gunlock_q; | |
1371 | ||
fe1bdedc | 1372 | error = gfs2_trans_begin(sdp, sdp->sd_max_dirres + |
54335b1f | 1373 | gfs2_rg_blocks(ndip) + |
b3b94faa | 1374 | 4 * RES_DINODE + 4 * RES_LEAF + |
87d21e07 | 1375 | RES_STATFS + RES_QUOTA + 4, 0); |
b3b94faa DT |
1376 | if (error) |
1377 | goto out_ipreserv; | |
1378 | } else { | |
1379 | error = gfs2_trans_begin(sdp, 4 * RES_DINODE + | |
87d21e07 | 1380 | 5 * RES_LEAF + 4, 0); |
b3b94faa DT |
1381 | if (error) |
1382 | goto out_gunlock; | |
1383 | } | |
1384 | ||
1385 | /* Remove the target file, if it exists */ | |
1386 | ||
1387 | if (nip) { | |
855d23ce SW |
1388 | struct buffer_head *bh; |
1389 | error = gfs2_meta_inode_buffer(nip, &bh); | |
b3b94faa DT |
1390 | if (error) |
1391 | goto out_end_trans; | |
855d23ce SW |
1392 | error = gfs2_unlink_inode(ndip, ndentry, bh); |
1393 | brelse(bh); | |
b3b94faa DT |
1394 | } |
1395 | ||
1396 | if (dir_rename) { | |
8d123585 | 1397 | error = gfs2_dir_mvino(ip, &gfs2_qdotdot, ndip, DT_DIR); |
b3b94faa DT |
1398 | if (error) |
1399 | goto out_end_trans; | |
1400 | } else { | |
1401 | struct buffer_head *dibh; | |
1402 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1403 | if (error) | |
1404 | goto out_end_trans; | |
4bd91ba1 | 1405 | ip->i_inode.i_ctime = CURRENT_TIME; |
d4e9c4c3 | 1406 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
539e5d6b | 1407 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa DT |
1408 | brelse(dibh); |
1409 | } | |
1410 | ||
855d23ce | 1411 | error = gfs2_dir_del(odip, odentry); |
b3b94faa DT |
1412 | if (error) |
1413 | goto out_end_trans; | |
1414 | ||
3d6ecb7d | 1415 | error = gfs2_dir_add(ndir, &ndentry->d_name, ip); |
b3b94faa DT |
1416 | if (error) |
1417 | goto out_end_trans; | |
1418 | ||
feaa7bba | 1419 | out_end_trans: |
b3b94faa | 1420 | gfs2_trans_end(sdp); |
feaa7bba | 1421 | out_ipreserv: |
b3b94faa DT |
1422 | if (alloc_required) |
1423 | gfs2_inplace_release(ndip); | |
feaa7bba | 1424 | out_gunlock_q: |
b3b94faa DT |
1425 | if (alloc_required) |
1426 | gfs2_quota_unlock(ndip); | |
feaa7bba | 1427 | out_alloc: |
b3b94faa | 1428 | if (alloc_required) |
564e12b1 | 1429 | gfs2_qadata_put(ndip); |
feaa7bba | 1430 | out_gunlock: |
72dbf479 BP |
1431 | while (x--) { |
1432 | gfs2_glock_dq(ghs + x); | |
b3b94faa | 1433 | gfs2_holder_uninit(ghs + x); |
72dbf479 | 1434 | } |
feaa7bba | 1435 | out_gunlock_r: |
0188d6c5 | 1436 | if (r_gh.gh_gl) |
b3b94faa | 1437 | gfs2_glock_dq_uninit(&r_gh); |
feaa7bba | 1438 | out: |
b3b94faa DT |
1439 | return error; |
1440 | } | |
1441 | ||
536baf02 | 1442 | /** |
c177c2ac AV |
1443 | * gfs2_follow_link - Follow a symbolic link |
1444 | * @dentry: The dentry of the link | |
1445 | * @nd: Data that we pass to vfs_follow_link() | |
536baf02 | 1446 | * |
c177c2ac | 1447 | * This can handle symlinks of any size. |
536baf02 | 1448 | * |
c177c2ac | 1449 | * Returns: 0 on success or error code |
536baf02 SW |
1450 | */ |
1451 | ||
c177c2ac | 1452 | static void *gfs2_follow_link(struct dentry *dentry, struct nameidata *nd) |
536baf02 | 1453 | { |
c177c2ac | 1454 | struct gfs2_inode *ip = GFS2_I(dentry->d_inode); |
536baf02 SW |
1455 | struct gfs2_holder i_gh; |
1456 | struct buffer_head *dibh; | |
160b4026 | 1457 | unsigned int size; |
c177c2ac | 1458 | char *buf; |
536baf02 SW |
1459 | int error; |
1460 | ||
1461 | gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh); | |
1462 | error = gfs2_glock_nq(&i_gh); | |
1463 | if (error) { | |
1464 | gfs2_holder_uninit(&i_gh); | |
c177c2ac AV |
1465 | nd_set_link(nd, ERR_PTR(error)); |
1466 | return NULL; | |
536baf02 SW |
1467 | } |
1468 | ||
a2e0f799 SW |
1469 | size = (unsigned int)i_size_read(&ip->i_inode); |
1470 | if (size == 0) { | |
536baf02 | 1471 | gfs2_consist_inode(ip); |
c177c2ac | 1472 | buf = ERR_PTR(-EIO); |
536baf02 SW |
1473 | goto out; |
1474 | } | |
1475 | ||
1476 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
c177c2ac AV |
1477 | if (error) { |
1478 | buf = ERR_PTR(error); | |
536baf02 | 1479 | goto out; |
536baf02 SW |
1480 | } |
1481 | ||
160b4026 | 1482 | buf = kzalloc(size + 1, GFP_NOFS); |
c177c2ac AV |
1483 | if (!buf) |
1484 | buf = ERR_PTR(-ENOMEM); | |
1485 | else | |
160b4026 | 1486 | memcpy(buf, dibh->b_data + sizeof(struct gfs2_dinode), size); |
536baf02 SW |
1487 | brelse(dibh); |
1488 | out: | |
1489 | gfs2_glock_dq_uninit(&i_gh); | |
c177c2ac AV |
1490 | nd_set_link(nd, buf); |
1491 | return NULL; | |
b3b94faa DT |
1492 | } |
1493 | ||
c177c2ac | 1494 | static void gfs2_put_link(struct dentry *dentry, struct nameidata *nd, void *p) |
b3b94faa | 1495 | { |
c177c2ac AV |
1496 | char *s = nd_get_link(nd); |
1497 | if (!IS_ERR(s)) | |
1498 | kfree(s); | |
b3b94faa DT |
1499 | } |
1500 | ||
1501 | /** | |
1502 | * gfs2_permission - | |
75d5cfbe SW |
1503 | * @inode: The inode |
1504 | * @mask: The mask to be tested | |
1505 | * @flags: Indicates whether this is an RCU path walk or not | |
b3b94faa | 1506 | * |
300c7d75 SW |
1507 | * This may be called from the VFS directly, or from within GFS2 with the |
1508 | * inode locked, so we look to see if the glock is already locked and only | |
1509 | * lock the glock if its not already been done. | |
1510 | * | |
b3b94faa DT |
1511 | * Returns: errno |
1512 | */ | |
1513 | ||
10556cb2 | 1514 | int gfs2_permission(struct inode *inode, int mask) |
b3b94faa | 1515 | { |
b74c79e9 | 1516 | struct gfs2_inode *ip; |
b3b94faa DT |
1517 | struct gfs2_holder i_gh; |
1518 | int error; | |
300c7d75 | 1519 | int unlock = 0; |
b3b94faa | 1520 | |
b74c79e9 NP |
1521 | |
1522 | ip = GFS2_I(inode); | |
7afd88d9 | 1523 | if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) { |
10556cb2 | 1524 | if (mask & MAY_NOT_BLOCK) |
75d5cfbe | 1525 | return -ECHILD; |
300c7d75 SW |
1526 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh); |
1527 | if (error) | |
1528 | return error; | |
1529 | unlock = 1; | |
1530 | } | |
b3b94faa | 1531 | |
f58ba889 MS |
1532 | if ((mask & MAY_WRITE) && IS_IMMUTABLE(inode)) |
1533 | error = -EACCES; | |
1534 | else | |
2830ba7f | 1535 | error = generic_permission(inode, mask); |
300c7d75 | 1536 | if (unlock) |
b3b94faa | 1537 | gfs2_glock_dq_uninit(&i_gh); |
b3b94faa DT |
1538 | |
1539 | return error; | |
1540 | } | |
1541 | ||
ab9bbda0 | 1542 | static int __gfs2_setattr_simple(struct inode *inode, struct iattr *attr) |
194c011f | 1543 | { |
194c011f SW |
1544 | setattr_copy(inode, attr); |
1545 | mark_inode_dirty(inode); | |
194c011f SW |
1546 | return 0; |
1547 | } | |
1548 | ||
1549 | /** | |
1550 | * gfs2_setattr_simple - | |
1551 | * @ip: | |
1552 | * @attr: | |
1553 | * | |
1554 | * Returns: errno | |
1555 | */ | |
1556 | ||
ab9bbda0 | 1557 | int gfs2_setattr_simple(struct inode *inode, struct iattr *attr) |
194c011f SW |
1558 | { |
1559 | int error; | |
1560 | ||
1561 | if (current->journal_info) | |
ab9bbda0 | 1562 | return __gfs2_setattr_simple(inode, attr); |
194c011f | 1563 | |
ab9bbda0 | 1564 | error = gfs2_trans_begin(GFS2_SB(inode), RES_DINODE, 0); |
194c011f SW |
1565 | if (error) |
1566 | return error; | |
1567 | ||
ab9bbda0 SW |
1568 | error = __gfs2_setattr_simple(inode, attr); |
1569 | gfs2_trans_end(GFS2_SB(inode)); | |
194c011f SW |
1570 | return error; |
1571 | } | |
1572 | ||
b3b94faa DT |
1573 | static int setattr_chown(struct inode *inode, struct iattr *attr) |
1574 | { | |
feaa7bba SW |
1575 | struct gfs2_inode *ip = GFS2_I(inode); |
1576 | struct gfs2_sbd *sdp = GFS2_SB(inode); | |
cd915493 | 1577 | u32 ouid, ogid, nuid, ngid; |
b3b94faa DT |
1578 | int error; |
1579 | ||
2933f925 SW |
1580 | ouid = inode->i_uid; |
1581 | ogid = inode->i_gid; | |
b3b94faa DT |
1582 | nuid = attr->ia_uid; |
1583 | ngid = attr->ia_gid; | |
1584 | ||
1585 | if (!(attr->ia_valid & ATTR_UID) || ouid == nuid) | |
1586 | ouid = nuid = NO_QUOTA_CHANGE; | |
1587 | if (!(attr->ia_valid & ATTR_GID) || ogid == ngid) | |
1588 | ogid = ngid = NO_QUOTA_CHANGE; | |
1589 | ||
564e12b1 | 1590 | if (!gfs2_qadata_get(ip)) |
182fe5ab | 1591 | return -ENOMEM; |
b3b94faa DT |
1592 | |
1593 | error = gfs2_quota_lock(ip, nuid, ngid); | |
1594 | if (error) | |
1595 | goto out_alloc; | |
1596 | ||
1597 | if (ouid != NO_QUOTA_CHANGE || ogid != NO_QUOTA_CHANGE) { | |
1598 | error = gfs2_quota_check(ip, nuid, ngid); | |
1599 | if (error) | |
1600 | goto out_gunlock_q; | |
1601 | } | |
1602 | ||
1603 | error = gfs2_trans_begin(sdp, RES_DINODE + 2 * RES_QUOTA, 0); | |
1604 | if (error) | |
1605 | goto out_gunlock_q; | |
1606 | ||
ab9bbda0 | 1607 | error = gfs2_setattr_simple(inode, attr); |
b3b94faa DT |
1608 | if (error) |
1609 | goto out_end_trans; | |
1610 | ||
b3b94faa | 1611 | if (ouid != NO_QUOTA_CHANGE || ogid != NO_QUOTA_CHANGE) { |
77658aad SW |
1612 | u64 blocks = gfs2_get_inode_blocks(&ip->i_inode); |
1613 | gfs2_quota_change(ip, -blocks, ouid, ogid); | |
1614 | gfs2_quota_change(ip, blocks, nuid, ngid); | |
b3b94faa DT |
1615 | } |
1616 | ||
a91ea69f | 1617 | out_end_trans: |
b3b94faa | 1618 | gfs2_trans_end(sdp); |
a91ea69f | 1619 | out_gunlock_q: |
b3b94faa | 1620 | gfs2_quota_unlock(ip); |
a91ea69f | 1621 | out_alloc: |
564e12b1 | 1622 | gfs2_qadata_put(ip); |
b3b94faa DT |
1623 | return error; |
1624 | } | |
1625 | ||
1626 | /** | |
1627 | * gfs2_setattr - Change attributes on an inode | |
1628 | * @dentry: The dentry which is changing | |
1629 | * @attr: The structure describing the change | |
1630 | * | |
1631 | * The VFS layer wants to change one or more of an inodes attributes. Write | |
1632 | * that change out to disk. | |
1633 | * | |
1634 | * Returns: errno | |
1635 | */ | |
1636 | ||
1637 | static int gfs2_setattr(struct dentry *dentry, struct iattr *attr) | |
1638 | { | |
1639 | struct inode *inode = dentry->d_inode; | |
feaa7bba | 1640 | struct gfs2_inode *ip = GFS2_I(inode); |
b3b94faa DT |
1641 | struct gfs2_holder i_gh; |
1642 | int error; | |
1643 | ||
b3b94faa DT |
1644 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); |
1645 | if (error) | |
1646 | return error; | |
1647 | ||
1648 | error = -EPERM; | |
1649 | if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) | |
1650 | goto out; | |
1651 | ||
1652 | error = inode_change_ok(inode, attr); | |
1653 | if (error) | |
1654 | goto out; | |
1655 | ||
1656 | if (attr->ia_valid & ATTR_SIZE) | |
ff8f33c8 | 1657 | error = gfs2_setattr_size(inode, attr->ia_size); |
b3b94faa DT |
1658 | else if (attr->ia_valid & (ATTR_UID | ATTR_GID)) |
1659 | error = setattr_chown(inode, attr); | |
1660 | else if ((attr->ia_valid & ATTR_MODE) && IS_POSIXACL(inode)) | |
1661 | error = gfs2_acl_chmod(ip, attr); | |
1662 | else | |
ab9bbda0 | 1663 | error = gfs2_setattr_simple(inode, attr); |
b3b94faa | 1664 | |
a91ea69f | 1665 | out: |
b3b94faa DT |
1666 | if (!error) |
1667 | mark_inode_dirty(inode); | |
ab9bbda0 | 1668 | gfs2_glock_dq_uninit(&i_gh); |
b3b94faa DT |
1669 | return error; |
1670 | } | |
1671 | ||
1672 | /** | |
1673 | * gfs2_getattr - Read out an inode's attributes | |
26c1a574 | 1674 | * @mnt: The vfsmount the inode is being accessed from |
b3b94faa DT |
1675 | * @dentry: The dentry to stat |
1676 | * @stat: The inode's stats | |
1677 | * | |
dcf3dd85 SW |
1678 | * This may be called from the VFS directly, or from within GFS2 with the |
1679 | * inode locked, so we look to see if the glock is already locked and only | |
1680 | * lock the glock if its not already been done. Note that its the NFS | |
1681 | * readdirplus operation which causes this to be called (from filldir) | |
1682 | * with the glock already held. | |
1683 | * | |
b3b94faa DT |
1684 | * Returns: errno |
1685 | */ | |
1686 | ||
1687 | static int gfs2_getattr(struct vfsmount *mnt, struct dentry *dentry, | |
1688 | struct kstat *stat) | |
1689 | { | |
1690 | struct inode *inode = dentry->d_inode; | |
feaa7bba | 1691 | struct gfs2_inode *ip = GFS2_I(inode); |
b3b94faa DT |
1692 | struct gfs2_holder gh; |
1693 | int error; | |
dcf3dd85 | 1694 | int unlock = 0; |
b3b94faa | 1695 | |
7afd88d9 | 1696 | if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) { |
dcf3dd85 SW |
1697 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); |
1698 | if (error) | |
1699 | return error; | |
1700 | unlock = 1; | |
b3b94faa DT |
1701 | } |
1702 | ||
dcf3dd85 | 1703 | generic_fillattr(inode, stat); |
d7c103d0 | 1704 | if (unlock) |
dcf3dd85 SW |
1705 | gfs2_glock_dq_uninit(&gh); |
1706 | ||
1707 | return 0; | |
b3b94faa DT |
1708 | } |
1709 | ||
1710 | static int gfs2_setxattr(struct dentry *dentry, const char *name, | |
1711 | const void *data, size_t size, int flags) | |
1712 | { | |
feaa7bba | 1713 | struct inode *inode = dentry->d_inode; |
40b78a32 SW |
1714 | struct gfs2_inode *ip = GFS2_I(inode); |
1715 | struct gfs2_holder gh; | |
1716 | int ret; | |
b3b94faa | 1717 | |
40b78a32 SW |
1718 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); |
1719 | ret = gfs2_glock_nq(&gh); | |
1720 | if (ret == 0) { | |
1721 | ret = generic_setxattr(dentry, name, data, size, flags); | |
1722 | gfs2_glock_dq(&gh); | |
1723 | } | |
1724 | gfs2_holder_uninit(&gh); | |
1725 | return ret; | |
b3b94faa DT |
1726 | } |
1727 | ||
1728 | static ssize_t gfs2_getxattr(struct dentry *dentry, const char *name, | |
1729 | void *data, size_t size) | |
1730 | { | |
40b78a32 SW |
1731 | struct inode *inode = dentry->d_inode; |
1732 | struct gfs2_inode *ip = GFS2_I(inode); | |
1733 | struct gfs2_holder gh; | |
1734 | int ret; | |
b3b94faa | 1735 | |
40b78a32 SW |
1736 | gfs2_holder_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); |
1737 | ret = gfs2_glock_nq(&gh); | |
1738 | if (ret == 0) { | |
1739 | ret = generic_getxattr(dentry, name, data, size); | |
1740 | gfs2_glock_dq(&gh); | |
1741 | } | |
1742 | gfs2_holder_uninit(&gh); | |
1743 | return ret; | |
b3b94faa DT |
1744 | } |
1745 | ||
1746 | static int gfs2_removexattr(struct dentry *dentry, const char *name) | |
1747 | { | |
40b78a32 SW |
1748 | struct inode *inode = dentry->d_inode; |
1749 | struct gfs2_inode *ip = GFS2_I(inode); | |
1750 | struct gfs2_holder gh; | |
1751 | int ret; | |
b3b94faa | 1752 | |
40b78a32 SW |
1753 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); |
1754 | ret = gfs2_glock_nq(&gh); | |
1755 | if (ret == 0) { | |
1756 | ret = generic_removexattr(dentry, name); | |
1757 | gfs2_glock_dq(&gh); | |
1758 | } | |
1759 | gfs2_holder_uninit(&gh); | |
1760 | return ret; | |
b3b94faa DT |
1761 | } |
1762 | ||
e9079cce SW |
1763 | static int gfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, |
1764 | u64 start, u64 len) | |
1765 | { | |
1766 | struct gfs2_inode *ip = GFS2_I(inode); | |
1767 | struct gfs2_holder gh; | |
1768 | int ret; | |
1769 | ||
1770 | ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC); | |
1771 | if (ret) | |
1772 | return ret; | |
1773 | ||
1774 | mutex_lock(&inode->i_mutex); | |
1775 | ||
1776 | ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh); | |
1777 | if (ret) | |
1778 | goto out; | |
1779 | ||
1780 | if (gfs2_is_stuffed(ip)) { | |
1781 | u64 phys = ip->i_no_addr << inode->i_blkbits; | |
1782 | u64 size = i_size_read(inode); | |
1783 | u32 flags = FIEMAP_EXTENT_LAST|FIEMAP_EXTENT_NOT_ALIGNED| | |
1784 | FIEMAP_EXTENT_DATA_INLINE; | |
1785 | phys += sizeof(struct gfs2_dinode); | |
1786 | phys += start; | |
1787 | if (start + len > size) | |
1788 | len = size - start; | |
1789 | if (start < size) | |
1790 | ret = fiemap_fill_next_extent(fieinfo, start, phys, | |
1791 | len, flags); | |
1792 | if (ret == 1) | |
1793 | ret = 0; | |
1794 | } else { | |
1795 | ret = __generic_block_fiemap(inode, fieinfo, start, len, | |
1796 | gfs2_block_map); | |
1797 | } | |
1798 | ||
1799 | gfs2_glock_dq_uninit(&gh); | |
1800 | out: | |
1801 | mutex_unlock(&inode->i_mutex); | |
1802 | return ret; | |
1803 | } | |
1804 | ||
92e1d5be | 1805 | const struct inode_operations gfs2_file_iops = { |
e6305c43 | 1806 | .permission = gfs2_permission, |
b3b94faa DT |
1807 | .setattr = gfs2_setattr, |
1808 | .getattr = gfs2_getattr, | |
1809 | .setxattr = gfs2_setxattr, | |
1810 | .getxattr = gfs2_getxattr, | |
1811 | .listxattr = gfs2_listxattr, | |
1812 | .removexattr = gfs2_removexattr, | |
e9079cce | 1813 | .fiemap = gfs2_fiemap, |
4e34e719 | 1814 | .get_acl = gfs2_get_acl, |
b3b94faa DT |
1815 | }; |
1816 | ||
92e1d5be | 1817 | const struct inode_operations gfs2_dir_iops = { |
b3b94faa DT |
1818 | .create = gfs2_create, |
1819 | .lookup = gfs2_lookup, | |
1820 | .link = gfs2_link, | |
1821 | .unlink = gfs2_unlink, | |
1822 | .symlink = gfs2_symlink, | |
1823 | .mkdir = gfs2_mkdir, | |
855d23ce | 1824 | .rmdir = gfs2_unlink, |
b3b94faa DT |
1825 | .mknod = gfs2_mknod, |
1826 | .rename = gfs2_rename, | |
e6305c43 | 1827 | .permission = gfs2_permission, |
b3b94faa DT |
1828 | .setattr = gfs2_setattr, |
1829 | .getattr = gfs2_getattr, | |
1830 | .setxattr = gfs2_setxattr, | |
1831 | .getxattr = gfs2_getxattr, | |
1832 | .listxattr = gfs2_listxattr, | |
1833 | .removexattr = gfs2_removexattr, | |
e9079cce | 1834 | .fiemap = gfs2_fiemap, |
4e34e719 | 1835 | .get_acl = gfs2_get_acl, |
b3b94faa DT |
1836 | }; |
1837 | ||
92e1d5be | 1838 | const struct inode_operations gfs2_symlink_iops = { |
c177c2ac | 1839 | .readlink = generic_readlink, |
b3b94faa | 1840 | .follow_link = gfs2_follow_link, |
c177c2ac | 1841 | .put_link = gfs2_put_link, |
e6305c43 | 1842 | .permission = gfs2_permission, |
b3b94faa DT |
1843 | .setattr = gfs2_setattr, |
1844 | .getattr = gfs2_getattr, | |
1845 | .setxattr = gfs2_setxattr, | |
1846 | .getxattr = gfs2_getxattr, | |
1847 | .listxattr = gfs2_listxattr, | |
1848 | .removexattr = gfs2_removexattr, | |
e9079cce | 1849 | .fiemap = gfs2_fiemap, |
4e34e719 | 1850 | .get_acl = gfs2_get_acl, |
b3b94faa DT |
1851 | }; |
1852 |