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 BP |
394 | error = gfs2_rindex_update(sdp); |
395 | if (error) | |
396 | fs_warn(sdp, "rindex update returns %d\n", error); | |
194c011f | 397 | |
564e12b1 | 398 | error = gfs2_inplace_reserve(dip, RES_DINODE); |
194c011f SW |
399 | if (error) |
400 | goto out; | |
401 | ||
402 | error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_STATFS, 0); | |
403 | if (error) | |
404 | goto out_ipreserv; | |
405 | ||
6e87ed0f | 406 | error = gfs2_alloc_blocks(dip, no_addr, &dblocks, 1, generation); |
194c011f SW |
407 | |
408 | gfs2_trans_end(sdp); | |
409 | ||
410 | out_ipreserv: | |
411 | gfs2_inplace_release(dip); | |
412 | out: | |
194c011f SW |
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, | |
175a4eb7 | 450 | const struct gfs2_inum_host *inum, umode_t mode, |
194c011f | 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, | |
175a4eb7 | 519 | umode_t 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); | |
564e12b1 | 528 | if (!gfs2_qadata_get(dip)) |
194c011f SW |
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: | |
564e12b1 | 550 | gfs2_qadata_put(dip); |
194c011f SW |
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); | |
564e12b1 | 558 | struct gfs2_qadata *qa; |
194c011f SW |
559 | int alloc_required; |
560 | struct buffer_head *dibh; | |
561 | int error; | |
562 | ||
564e12b1 BP |
563 | qa = gfs2_qadata_get(dip); |
564 | if (!qa) | |
194c011f SW |
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 | ||
564e12b1 | 579 | error = gfs2_inplace_reserve(dip, sdp->sd_max_dirres); |
194c011f SW |
580 | if (error) |
581 | goto fail_quota_locks; | |
582 | ||
583 | error = gfs2_trans_begin(sdp, sdp->sd_max_dirres + | |
54335b1f | 584 | dip->i_rgd->rd_length + |
194c011f SW |
585 | 2 * RES_DINODE + |
586 | RES_STATFS + RES_QUOTA, 0); | |
587 | if (error) | |
588 | goto fail_ipreserv; | |
589 | } else { | |
590 | error = gfs2_trans_begin(sdp, RES_LEAF + 2 * RES_DINODE, 0); | |
591 | if (error) | |
592 | goto fail_quota_locks; | |
593 | } | |
594 | ||
595 | error = gfs2_dir_add(&dip->i_inode, name, ip); | |
596 | if (error) | |
597 | goto fail_end_trans; | |
598 | ||
599 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
600 | if (error) | |
601 | goto fail_end_trans; | |
66ad863b | 602 | set_nlink(&ip->i_inode, S_ISDIR(ip->i_inode.i_mode) ? 2 : 1); |
194c011f SW |
603 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
604 | gfs2_dinode_out(ip, dibh->b_data); | |
605 | brelse(dibh); | |
606 | return 0; | |
607 | ||
608 | fail_end_trans: | |
609 | gfs2_trans_end(sdp); | |
610 | ||
611 | fail_ipreserv: | |
54335b1f | 612 | gfs2_inplace_release(dip); |
194c011f SW |
613 | |
614 | fail_quota_locks: | |
615 | gfs2_quota_unlock(dip); | |
616 | ||
617 | fail: | |
564e12b1 | 618 | gfs2_qadata_put(dip); |
194c011f SW |
619 | return error; |
620 | } | |
621 | ||
46cc1e5f | 622 | static int gfs2_initxattrs(struct inode *inode, const struct xattr *xattr_array, |
9d8f13ba | 623 | void *fs_info) |
194c011f | 624 | { |
9d8f13ba MZ |
625 | const struct xattr *xattr; |
626 | int err = 0; | |
627 | ||
628 | for (xattr = xattr_array; xattr->name != NULL; xattr++) { | |
629 | err = __gfs2_xattr_set(inode, xattr->name, xattr->value, | |
630 | xattr->value_len, 0, | |
631 | GFS2_EATYPE_SECURITY); | |
632 | if (err < 0) | |
633 | break; | |
194c011f | 634 | } |
194c011f SW |
635 | return err; |
636 | } | |
b3b94faa | 637 | |
9d8f13ba MZ |
638 | static int gfs2_security_init(struct gfs2_inode *dip, struct gfs2_inode *ip, |
639 | const struct qstr *qstr) | |
640 | { | |
641 | return security_inode_init_security(&ip->i_inode, &dip->i_inode, qstr, | |
642 | &gfs2_initxattrs, NULL); | |
643 | } | |
644 | ||
194c011f | 645 | /** |
f2741d98 SW |
646 | * gfs2_create_inode - Create a new inode |
647 | * @dir: The parent directory | |
648 | * @dentry: The new dentry | |
649 | * @mode: The permissions on the new inode | |
650 | * @dev: For device nodes, this is the device number | |
651 | * @symname: For symlinks, this is the link destination | |
652 | * @size: The initial size of the inode (ignored for directories) | |
194c011f | 653 | * |
f2741d98 | 654 | * Returns: 0 on success, or error code |
194c011f SW |
655 | */ |
656 | ||
f2741d98 | 657 | static int gfs2_create_inode(struct inode *dir, struct dentry *dentry, |
175a4eb7 | 658 | umode_t mode, dev_t dev, const char *symname, |
9a63edd1 | 659 | unsigned int size, int excl) |
194c011f | 660 | { |
f2741d98 SW |
661 | const struct qstr *name = &dentry->d_name; |
662 | struct gfs2_holder ghs[2]; | |
194c011f | 663 | struct inode *inode = NULL; |
f2741d98 | 664 | struct gfs2_inode *dip = GFS2_I(dir); |
194c011f SW |
665 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); |
666 | struct gfs2_inum_host inum = { .no_addr = 0, .no_formal_ino = 0 }; | |
667 | int error; | |
668 | u64 generation; | |
669 | struct buffer_head *bh = NULL; | |
670 | ||
671 | if (!name->len || name->len > GFS2_FNAMESIZE) | |
f2741d98 | 672 | return -ENAMETOOLONG; |
194c011f | 673 | |
f2741d98 | 674 | error = gfs2_glock_nq_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); |
194c011f SW |
675 | if (error) |
676 | goto fail; | |
677 | ||
678 | error = create_ok(dip, name, mode); | |
9a63edd1 SW |
679 | if ((error == -EEXIST) && S_ISREG(mode) && !excl) { |
680 | inode = gfs2_lookupi(dir, &dentry->d_name, 0); | |
681 | gfs2_glock_dq_uninit(ghs); | |
682 | d_instantiate(dentry, inode); | |
683 | return IS_ERR(inode) ? PTR_ERR(inode) : 0; | |
684 | } | |
194c011f SW |
685 | if (error) |
686 | goto fail_gunlock; | |
687 | ||
688 | error = alloc_dinode(dip, &inum.no_addr, &generation); | |
689 | if (error) | |
690 | goto fail_gunlock; | |
691 | inum.no_formal_ino = generation; | |
692 | ||
693 | error = gfs2_glock_nq_num(sdp, inum.no_addr, &gfs2_inode_glops, | |
694 | LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1); | |
695 | if (error) | |
696 | goto fail_gunlock; | |
697 | ||
160b4026 | 698 | error = make_dinode(dip, ghs[1].gh_gl, mode, &inum, &generation, dev, symname, size, &bh); |
194c011f SW |
699 | if (error) |
700 | goto fail_gunlock2; | |
701 | ||
702 | inode = gfs2_inode_lookup(dir->i_sb, IF2DT(mode), inum.no_addr, | |
703 | inum.no_formal_ino, 0); | |
704 | if (IS_ERR(inode)) | |
705 | goto fail_gunlock2; | |
706 | ||
707 | error = gfs2_inode_refresh(GFS2_I(inode)); | |
708 | if (error) | |
709 | goto fail_gunlock2; | |
710 | ||
711 | error = gfs2_acl_create(dip, inode); | |
712 | if (error) | |
713 | goto fail_gunlock2; | |
714 | ||
715 | error = gfs2_security_init(dip, GFS2_I(inode), name); | |
716 | if (error) | |
717 | goto fail_gunlock2; | |
718 | ||
719 | error = link_dinode(dip, name, GFS2_I(inode)); | |
720 | if (error) | |
721 | goto fail_gunlock2; | |
722 | ||
723 | if (bh) | |
724 | brelse(bh); | |
f2741d98 SW |
725 | |
726 | gfs2_trans_end(sdp); | |
564e12b1 BP |
727 | /* Check if we reserved space in the rgrp. Function link_dinode may |
728 | not, depending on whether alloc is required. */ | |
729 | if (dip->i_res) | |
730 | gfs2_inplace_release(dip); | |
f2741d98 | 731 | gfs2_quota_unlock(dip); |
564e12b1 | 732 | gfs2_qadata_put(dip); |
f2741d98 | 733 | mark_inode_dirty(inode); |
ab9bbda0 | 734 | gfs2_glock_dq_uninit_m(2, ghs); |
f2741d98 SW |
735 | d_instantiate(dentry, inode); |
736 | return 0; | |
194c011f SW |
737 | |
738 | fail_gunlock2: | |
739 | gfs2_glock_dq_uninit(ghs + 1); | |
194c011f | 740 | fail_gunlock: |
f2741d98 | 741 | gfs2_glock_dq_uninit(ghs); |
40ac218f SW |
742 | if (inode && !IS_ERR(inode)) { |
743 | set_bit(GIF_ALLOC_FAILED, &GFS2_I(inode)->i_flags); | |
744 | iput(inode); | |
745 | } | |
194c011f SW |
746 | fail: |
747 | if (bh) | |
748 | brelse(bh); | |
f2741d98 | 749 | return error; |
194c011f | 750 | } |
f2741d98 | 751 | |
b3b94faa DT |
752 | /** |
753 | * gfs2_create - Create a file | |
754 | * @dir: The directory in which to create the file | |
755 | * @dentry: The dentry of the new file | |
756 | * @mode: The mode of the new file | |
757 | * | |
758 | * Returns: errno | |
759 | */ | |
760 | ||
761 | static int gfs2_create(struct inode *dir, struct dentry *dentry, | |
4acdaf27 | 762 | umode_t mode, struct nameidata *nd) |
b3b94faa | 763 | { |
9a63edd1 SW |
764 | int excl = 0; |
765 | if (nd && (nd->flags & LOOKUP_EXCL)) | |
766 | excl = 1; | |
767 | return gfs2_create_inode(dir, dentry, S_IFREG | mode, 0, NULL, 0, excl); | |
b3b94faa DT |
768 | } |
769 | ||
770 | /** | |
771 | * gfs2_lookup - Look up a filename in a directory and return its inode | |
772 | * @dir: The directory inode | |
773 | * @dentry: The dentry of the new inode | |
774 | * @nd: passed from Linux VFS, ignored by us | |
775 | * | |
776 | * Called by the VFS layer. Lock dir and call gfs2_lookupi() | |
777 | * | |
778 | * Returns: errno | |
779 | */ | |
780 | ||
781 | static struct dentry *gfs2_lookup(struct inode *dir, struct dentry *dentry, | |
782 | struct nameidata *nd) | |
783 | { | |
6c673ab3 AV |
784 | struct inode *inode = gfs2_lookupi(dir, &dentry->d_name, 0); |
785 | if (inode && !IS_ERR(inode)) { | |
9656b2c1 SW |
786 | struct gfs2_glock *gl = GFS2_I(inode)->i_gl; |
787 | struct gfs2_holder gh; | |
788 | int error; | |
789 | error = gfs2_glock_nq_init(gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); | |
790 | if (error) { | |
791 | iput(inode); | |
792 | return ERR_PTR(error); | |
793 | } | |
794 | gfs2_glock_dq_uninit(&gh); | |
9656b2c1 | 795 | } |
6c673ab3 | 796 | return d_splice_alias(inode, dentry); |
b3b94faa DT |
797 | } |
798 | ||
799 | /** | |
800 | * gfs2_link - Link to a file | |
801 | * @old_dentry: The inode to link | |
802 | * @dir: Add link to this directory | |
803 | * @dentry: The name of the link | |
804 | * | |
805 | * Link the inode in "old_dentry" into the directory "dir" with the | |
806 | * name in "dentry". | |
807 | * | |
808 | * Returns: errno | |
809 | */ | |
810 | ||
811 | static int gfs2_link(struct dentry *old_dentry, struct inode *dir, | |
812 | struct dentry *dentry) | |
813 | { | |
feaa7bba SW |
814 | struct gfs2_inode *dip = GFS2_I(dir); |
815 | struct gfs2_sbd *sdp = GFS2_SB(dir); | |
b3b94faa | 816 | struct inode *inode = old_dentry->d_inode; |
feaa7bba | 817 | struct gfs2_inode *ip = GFS2_I(inode); |
b3b94faa | 818 | struct gfs2_holder ghs[2]; |
2baee03f | 819 | struct buffer_head *dibh; |
b3b94faa DT |
820 | int alloc_required; |
821 | int error; | |
822 | ||
b60623c2 | 823 | if (S_ISDIR(inode->i_mode)) |
b3b94faa DT |
824 | return -EPERM; |
825 | ||
826 | gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); | |
827 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); | |
828 | ||
72dbf479 BP |
829 | error = gfs2_glock_nq(ghs); /* parent */ |
830 | if (error) | |
831 | goto out_parent; | |
832 | ||
833 | error = gfs2_glock_nq(ghs + 1); /* child */ | |
b3b94faa | 834 | if (error) |
72dbf479 | 835 | goto out_child; |
b3b94faa | 836 | |
d192a8e5 SW |
837 | error = -ENOENT; |
838 | if (inode->i_nlink == 0) | |
839 | goto out_gunlock; | |
840 | ||
10556cb2 | 841 | error = gfs2_permission(dir, MAY_WRITE | MAY_EXEC); |
b3b94faa DT |
842 | if (error) |
843 | goto out_gunlock; | |
844 | ||
dbb7cae2 | 845 | error = gfs2_dir_check(dir, &dentry->d_name, NULL); |
b3b94faa DT |
846 | switch (error) { |
847 | case -ENOENT: | |
848 | break; | |
849 | case 0: | |
850 | error = -EEXIST; | |
851 | default: | |
852 | goto out_gunlock; | |
853 | } | |
854 | ||
855 | error = -EINVAL; | |
4f56110a | 856 | if (!dip->i_inode.i_nlink) |
b3b94faa DT |
857 | goto out_gunlock; |
858 | error = -EFBIG; | |
ad6203f2 | 859 | if (dip->i_entries == (u32)-1) |
b3b94faa DT |
860 | goto out_gunlock; |
861 | error = -EPERM; | |
862 | if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) | |
863 | goto out_gunlock; | |
864 | error = -EINVAL; | |
4f56110a | 865 | if (!ip->i_inode.i_nlink) |
b3b94faa DT |
866 | goto out_gunlock; |
867 | error = -EMLINK; | |
4f56110a | 868 | if (ip->i_inode.i_nlink == (u32)-1) |
b3b94faa DT |
869 | goto out_gunlock; |
870 | ||
c752666c SW |
871 | alloc_required = error = gfs2_diradd_alloc_required(dir, &dentry->d_name); |
872 | if (error < 0) | |
b3b94faa | 873 | goto out_gunlock; |
c752666c | 874 | error = 0; |
b3b94faa DT |
875 | |
876 | if (alloc_required) { | |
564e12b1 BP |
877 | struct gfs2_qadata *qa = gfs2_qadata_get(dip); |
878 | ||
879 | if (!qa) { | |
182fe5ab CG |
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 | ||
564e12b1 | 888 | error = gfs2_inplace_reserve(dip, sdp->sd_max_dirres); |
b3b94faa DT |
889 | if (error) |
890 | goto out_gunlock_q; | |
891 | ||
1b50259b | 892 | error = gfs2_trans_begin(sdp, sdp->sd_max_dirres + |
54335b1f | 893 | gfs2_rg_blocks(dip) + |
b3b94faa DT |
894 | 2 * RES_DINODE + RES_STATFS + |
895 | RES_QUOTA, 0); | |
896 | if (error) | |
897 | goto out_ipres; | |
898 | } else { | |
899 | error = gfs2_trans_begin(sdp, 2 * RES_DINODE + RES_LEAF, 0); | |
900 | if (error) | |
901 | goto out_ipres; | |
902 | } | |
903 | ||
2baee03f | 904 | error = gfs2_meta_inode_buffer(ip, &dibh); |
b3b94faa DT |
905 | if (error) |
906 | goto out_end_trans; | |
907 | ||
3d6ecb7d | 908 | error = gfs2_dir_add(dir, &dentry->d_name, ip); |
2baee03f SW |
909 | if (error) |
910 | goto out_brelse; | |
911 | ||
912 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); | |
913 | inc_nlink(&ip->i_inode); | |
914 | ip->i_inode.i_ctime = CURRENT_TIME; | |
ab9bbda0 SW |
915 | ihold(inode); |
916 | d_instantiate(dentry, inode); | |
917 | mark_inode_dirty(inode); | |
b3b94faa | 918 | |
2baee03f SW |
919 | out_brelse: |
920 | brelse(dibh); | |
feaa7bba | 921 | out_end_trans: |
b3b94faa | 922 | gfs2_trans_end(sdp); |
feaa7bba | 923 | out_ipres: |
b3b94faa DT |
924 | if (alloc_required) |
925 | gfs2_inplace_release(dip); | |
feaa7bba | 926 | out_gunlock_q: |
b3b94faa DT |
927 | if (alloc_required) |
928 | gfs2_quota_unlock(dip); | |
feaa7bba | 929 | out_alloc: |
b3b94faa | 930 | if (alloc_required) |
564e12b1 | 931 | gfs2_qadata_put(dip); |
feaa7bba | 932 | out_gunlock: |
72dbf479 BP |
933 | gfs2_glock_dq(ghs + 1); |
934 | out_child: | |
935 | gfs2_glock_dq(ghs); | |
936 | out_parent: | |
b3b94faa DT |
937 | gfs2_holder_uninit(ghs); |
938 | gfs2_holder_uninit(ghs + 1); | |
b3b94faa DT |
939 | return error; |
940 | } | |
941 | ||
87ec2174 SW |
942 | /* |
943 | * gfs2_unlink_ok - check to see that a inode is still in a directory | |
944 | * @dip: the directory | |
945 | * @name: the name of the file | |
946 | * @ip: the inode | |
947 | * | |
948 | * Assumes that the lock on (at least) @dip is held. | |
949 | * | |
950 | * Returns: 0 if the parent/child relationship is correct, errno if it isn't | |
951 | */ | |
952 | ||
953 | static int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name, | |
954 | const struct gfs2_inode *ip) | |
955 | { | |
956 | int error; | |
957 | ||
958 | if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode)) | |
959 | return -EPERM; | |
960 | ||
961 | if ((dip->i_inode.i_mode & S_ISVTX) && | |
962 | dip->i_inode.i_uid != current_fsuid() && | |
963 | ip->i_inode.i_uid != current_fsuid() && !capable(CAP_FOWNER)) | |
964 | return -EPERM; | |
965 | ||
966 | if (IS_APPEND(&dip->i_inode)) | |
967 | return -EPERM; | |
968 | ||
10556cb2 | 969 | error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC); |
87ec2174 SW |
970 | if (error) |
971 | return error; | |
972 | ||
973 | error = gfs2_dir_check(&dip->i_inode, name, ip); | |
974 | if (error) | |
975 | return error; | |
976 | ||
977 | return 0; | |
978 | } | |
979 | ||
b3b94faa | 980 | /** |
855d23ce SW |
981 | * gfs2_unlink_inode - Removes an inode from its parent dir and unlinks it |
982 | * @dip: The parent directory | |
983 | * @name: The name of the entry in the parent directory | |
984 | * @bh: The inode buffer for the inode to be removed | |
985 | * @inode: The inode to be removed | |
986 | * | |
987 | * Called with all the locks and in a transaction. This will only be | |
988 | * called for a directory after it has been checked to ensure it is empty. | |
989 | * | |
990 | * Returns: 0 on success, or an error | |
991 | */ | |
992 | ||
993 | static int gfs2_unlink_inode(struct gfs2_inode *dip, | |
994 | const struct dentry *dentry, | |
995 | struct buffer_head *bh) | |
996 | { | |
997 | struct inode *inode = dentry->d_inode; | |
998 | struct gfs2_inode *ip = GFS2_I(inode); | |
999 | int error; | |
1000 | ||
1001 | error = gfs2_dir_del(dip, dentry); | |
1002 | if (error) | |
1003 | return error; | |
1004 | ||
1005 | ip->i_entries = 0; | |
1006 | inode->i_ctime = CURRENT_TIME; | |
1007 | if (S_ISDIR(inode->i_mode)) | |
1008 | clear_nlink(inode); | |
1009 | else | |
1010 | drop_nlink(inode); | |
855d23ce SW |
1011 | mark_inode_dirty(inode); |
1012 | if (inode->i_nlink == 0) | |
1013 | gfs2_unlink_di(inode); | |
1014 | return 0; | |
1015 | } | |
1016 | ||
1017 | ||
1018 | /** | |
1019 | * gfs2_unlink - Unlink an inode (this does rmdir as well) | |
1020 | * @dir: The inode of the directory containing the inode to unlink | |
b3b94faa DT |
1021 | * @dentry: The file itself |
1022 | * | |
855d23ce SW |
1023 | * This routine uses the type of the inode as a flag to figure out |
1024 | * whether this is an unlink or an rmdir. | |
b3b94faa DT |
1025 | * |
1026 | * Returns: errno | |
1027 | */ | |
1028 | ||
1029 | static int gfs2_unlink(struct inode *dir, struct dentry *dentry) | |
1030 | { | |
feaa7bba SW |
1031 | struct gfs2_inode *dip = GFS2_I(dir); |
1032 | struct gfs2_sbd *sdp = GFS2_SB(dir); | |
855d23ce SW |
1033 | struct inode *inode = dentry->d_inode; |
1034 | struct gfs2_inode *ip = GFS2_I(inode); | |
1035 | struct buffer_head *bh; | |
ddee7608 RC |
1036 | struct gfs2_holder ghs[3]; |
1037 | struct gfs2_rgrpd *rgd; | |
718b97bd | 1038 | int error; |
b3b94faa | 1039 | |
718b97bd BP |
1040 | error = gfs2_rindex_update(sdp); |
1041 | if (error) | |
1042 | return error; | |
b3b94faa | 1043 | gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); |
ddee7608 | 1044 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); |
b3b94faa | 1045 | |
dbb7cae2 | 1046 | rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr); |
718b97bd BP |
1047 | if (!rgd) { |
1048 | error = -EROFS; | |
87654896 | 1049 | goto out_inodes; |
718b97bd | 1050 | } |
ddee7608 RC |
1051 | gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2); |
1052 | ||
1053 | ||
8497a46e | 1054 | error = gfs2_glock_nq(ghs); /* parent */ |
b3b94faa | 1055 | if (error) |
8497a46e SW |
1056 | goto out_parent; |
1057 | ||
1058 | error = gfs2_glock_nq(ghs + 1); /* child */ | |
1059 | if (error) | |
1060 | goto out_child; | |
1061 | ||
d192a8e5 | 1062 | error = -ENOENT; |
855d23ce | 1063 | if (inode->i_nlink == 0) |
d192a8e5 SW |
1064 | goto out_rgrp; |
1065 | ||
855d23ce SW |
1066 | if (S_ISDIR(inode->i_mode)) { |
1067 | error = -ENOTEMPTY; | |
1068 | if (ip->i_entries > 2 || inode->i_nlink > 2) | |
1069 | goto out_rgrp; | |
1070 | } | |
1071 | ||
8497a46e SW |
1072 | error = gfs2_glock_nq(ghs + 2); /* rgrp */ |
1073 | if (error) | |
1074 | goto out_rgrp; | |
b3b94faa DT |
1075 | |
1076 | error = gfs2_unlink_ok(dip, &dentry->d_name, ip); | |
1077 | if (error) | |
72dbf479 | 1078 | goto out_gunlock; |
b3b94faa | 1079 | |
855d23ce | 1080 | error = gfs2_trans_begin(sdp, 2*RES_DINODE + 3*RES_LEAF + RES_RG_BIT, 0); |
b3b94faa | 1081 | if (error) |
cd012075 | 1082 | goto out_gunlock; |
b3b94faa | 1083 | |
855d23ce SW |
1084 | error = gfs2_meta_inode_buffer(ip, &bh); |
1085 | if (error) | |
1086 | goto out_end_trans; | |
b3b94faa | 1087 | |
855d23ce SW |
1088 | error = gfs2_unlink_inode(dip, dentry, bh); |
1089 | brelse(bh); | |
b3b94faa | 1090 | |
feaa7bba SW |
1091 | out_end_trans: |
1092 | gfs2_trans_end(sdp); | |
72dbf479 | 1093 | out_gunlock: |
8497a46e SW |
1094 | gfs2_glock_dq(ghs + 2); |
1095 | out_rgrp: | |
8497a46e SW |
1096 | gfs2_glock_dq(ghs + 1); |
1097 | out_child: | |
8497a46e SW |
1098 | gfs2_glock_dq(ghs); |
1099 | out_parent: | |
87654896 SW |
1100 | gfs2_holder_uninit(ghs + 2); |
1101 | out_inodes: | |
1102 | gfs2_holder_uninit(ghs + 1); | |
8497a46e | 1103 | gfs2_holder_uninit(ghs); |
b3b94faa DT |
1104 | return error; |
1105 | } | |
1106 | ||
1107 | /** | |
1108 | * gfs2_symlink - Create a symlink | |
1109 | * @dir: The directory to create the symlink in | |
1110 | * @dentry: The dentry to put the symlink in | |
1111 | * @symname: The thing which the link points to | |
1112 | * | |
1113 | * Returns: errno | |
1114 | */ | |
1115 | ||
1116 | static int gfs2_symlink(struct inode *dir, struct dentry *dentry, | |
1117 | const char *symname) | |
1118 | { | |
feaa7bba | 1119 | struct gfs2_sbd *sdp = GFS2_SB(dir); |
160b4026 | 1120 | unsigned int size; |
b3b94faa | 1121 | |
b3b94faa DT |
1122 | size = strlen(symname); |
1123 | if (size > sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode) - 1) | |
1124 | return -ENAMETOOLONG; | |
1125 | ||
9a63edd1 | 1126 | return gfs2_create_inode(dir, dentry, S_IFLNK | S_IRWXUGO, 0, symname, size, 0); |
b3b94faa DT |
1127 | } |
1128 | ||
1129 | /** | |
1130 | * gfs2_mkdir - Make a directory | |
1131 | * @dir: The parent directory of the new one | |
1132 | * @dentry: The dentry of the new directory | |
1133 | * @mode: The mode of the new directory | |
1134 | * | |
1135 | * Returns: errno | |
1136 | */ | |
1137 | ||
18bb1db3 | 1138 | static int gfs2_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) |
b3b94faa | 1139 | { |
9a63edd1 | 1140 | return gfs2_create_inode(dir, dentry, S_IFDIR | mode, 0, NULL, 0, 0); |
b3b94faa DT |
1141 | } |
1142 | ||
b3b94faa DT |
1143 | /** |
1144 | * gfs2_mknod - Make a special file | |
1145 | * @dir: The directory in which the special file will reside | |
1146 | * @dentry: The dentry of the special file | |
1147 | * @mode: The mode of the special file | |
f2741d98 | 1148 | * @dev: The device specification of the special file |
b3b94faa DT |
1149 | * |
1150 | */ | |
1151 | ||
1a67aafb | 1152 | static int gfs2_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, |
b3b94faa DT |
1153 | dev_t dev) |
1154 | { | |
9a63edd1 | 1155 | return gfs2_create_inode(dir, dentry, mode, dev, NULL, 0, 0); |
b3b94faa DT |
1156 | } |
1157 | ||
0188d6c5 SW |
1158 | /* |
1159 | * gfs2_ok_to_move - check if it's ok to move a directory to another directory | |
1160 | * @this: move this | |
1161 | * @to: to here | |
1162 | * | |
1163 | * Follow @to back to the root and make sure we don't encounter @this | |
1164 | * Assumes we already hold the rename lock. | |
1165 | * | |
1166 | * Returns: errno | |
1167 | */ | |
1168 | ||
1169 | static int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to) | |
1170 | { | |
1171 | struct inode *dir = &to->i_inode; | |
1172 | struct super_block *sb = dir->i_sb; | |
1173 | struct inode *tmp; | |
0188d6c5 SW |
1174 | int error = 0; |
1175 | ||
0188d6c5 SW |
1176 | igrab(dir); |
1177 | ||
1178 | for (;;) { | |
1179 | if (dir == &this->i_inode) { | |
1180 | error = -EINVAL; | |
1181 | break; | |
1182 | } | |
1183 | if (dir == sb->s_root->d_inode) { | |
1184 | error = 0; | |
1185 | break; | |
1186 | } | |
1187 | ||
8d123585 | 1188 | tmp = gfs2_lookupi(dir, &gfs2_qdotdot, 1); |
0188d6c5 SW |
1189 | if (IS_ERR(tmp)) { |
1190 | error = PTR_ERR(tmp); | |
1191 | break; | |
1192 | } | |
1193 | ||
1194 | iput(dir); | |
1195 | dir = tmp; | |
1196 | } | |
1197 | ||
1198 | iput(dir); | |
1199 | ||
1200 | return error; | |
1201 | } | |
1202 | ||
b3b94faa DT |
1203 | /** |
1204 | * gfs2_rename - Rename a file | |
1205 | * @odir: Parent directory of old file name | |
1206 | * @odentry: The old dentry of the file | |
1207 | * @ndir: Parent directory of new file name | |
1208 | * @ndentry: The new dentry of the file | |
1209 | * | |
1210 | * Returns: errno | |
1211 | */ | |
1212 | ||
1213 | static int gfs2_rename(struct inode *odir, struct dentry *odentry, | |
1214 | struct inode *ndir, struct dentry *ndentry) | |
1215 | { | |
feaa7bba SW |
1216 | struct gfs2_inode *odip = GFS2_I(odir); |
1217 | struct gfs2_inode *ndip = GFS2_I(ndir); | |
1218 | struct gfs2_inode *ip = GFS2_I(odentry->d_inode); | |
b3b94faa | 1219 | struct gfs2_inode *nip = NULL; |
feaa7bba | 1220 | struct gfs2_sbd *sdp = GFS2_SB(odir); |
8339ee54 | 1221 | struct gfs2_holder ghs[5], r_gh = { .gh_gl = NULL, }; |
ddee7608 | 1222 | struct gfs2_rgrpd *nrgd; |
b3b94faa DT |
1223 | unsigned int num_gh; |
1224 | int dir_rename = 0; | |
24b977b5 | 1225 | int alloc_required = 0; |
b3b94faa DT |
1226 | unsigned int x; |
1227 | int error; | |
1228 | ||
b3b94faa | 1229 | if (ndentry->d_inode) { |
feaa7bba | 1230 | nip = GFS2_I(ndentry->d_inode); |
b3b94faa DT |
1231 | if (ip == nip) |
1232 | return 0; | |
1233 | } | |
1234 | ||
0188d6c5 SW |
1235 | if (odip != ndip) { |
1236 | error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE, | |
1237 | 0, &r_gh); | |
b3b94faa DT |
1238 | if (error) |
1239 | goto out; | |
1240 | ||
0188d6c5 SW |
1241 | if (S_ISDIR(ip->i_inode.i_mode)) { |
1242 | dir_rename = 1; | |
1243 | /* don't move a dirctory into it's subdir */ | |
1244 | error = gfs2_ok_to_move(ip, ndip); | |
1245 | if (error) | |
1246 | goto out_gunlock_r; | |
1247 | } | |
b3b94faa DT |
1248 | } |
1249 | ||
d9d1ca30 | 1250 | num_gh = 1; |
b3b94faa | 1251 | gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); |
d9d1ca30 SW |
1252 | if (odip != ndip) { |
1253 | gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); | |
1254 | num_gh++; | |
1255 | } | |
1256 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); | |
1257 | num_gh++; | |
b3b94faa | 1258 | |
d9d1ca30 SW |
1259 | if (nip) { |
1260 | gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); | |
1261 | num_gh++; | |
ddee7608 RC |
1262 | /* grab the resource lock for unlink flag twiddling |
1263 | * this is the case of the target file already existing | |
1264 | * so we unlink before doing the rename | |
1265 | */ | |
dbb7cae2 | 1266 | nrgd = gfs2_blk2rgrpd(sdp, nip->i_no_addr); |
ddee7608 RC |
1267 | if (nrgd) |
1268 | gfs2_holder_init(nrgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh++); | |
d9d1ca30 | 1269 | } |
b3b94faa | 1270 | |
72dbf479 BP |
1271 | for (x = 0; x < num_gh; x++) { |
1272 | error = gfs2_glock_nq(ghs + x); | |
1273 | if (error) | |
1274 | goto out_gunlock; | |
1275 | } | |
b3b94faa | 1276 | |
d192a8e5 SW |
1277 | error = -ENOENT; |
1278 | if (ip->i_inode.i_nlink == 0) | |
1279 | goto out_gunlock; | |
1280 | ||
b3b94faa DT |
1281 | /* Check out the old directory */ |
1282 | ||
1283 | error = gfs2_unlink_ok(odip, &odentry->d_name, ip); | |
1284 | if (error) | |
1285 | goto out_gunlock; | |
1286 | ||
1287 | /* Check out the new directory */ | |
1288 | ||
1289 | if (nip) { | |
1290 | error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip); | |
1291 | if (error) | |
1292 | goto out_gunlock; | |
1293 | ||
d192a8e5 SW |
1294 | if (nip->i_inode.i_nlink == 0) { |
1295 | error = -EAGAIN; | |
1296 | goto out_gunlock; | |
1297 | } | |
1298 | ||
b60623c2 | 1299 | if (S_ISDIR(nip->i_inode.i_mode)) { |
ad6203f2 | 1300 | if (nip->i_entries < 2) { |
94fb763b | 1301 | gfs2_consist_inode(nip); |
b3b94faa DT |
1302 | error = -EIO; |
1303 | goto out_gunlock; | |
1304 | } | |
ad6203f2 | 1305 | if (nip->i_entries > 2) { |
b3b94faa DT |
1306 | error = -ENOTEMPTY; |
1307 | goto out_gunlock; | |
1308 | } | |
1309 | } | |
1310 | } else { | |
10556cb2 | 1311 | error = gfs2_permission(ndir, MAY_WRITE | MAY_EXEC); |
b3b94faa DT |
1312 | if (error) |
1313 | goto out_gunlock; | |
1314 | ||
dbb7cae2 | 1315 | error = gfs2_dir_check(ndir, &ndentry->d_name, NULL); |
b3b94faa DT |
1316 | switch (error) { |
1317 | case -ENOENT: | |
1318 | error = 0; | |
1319 | break; | |
1320 | case 0: | |
1321 | error = -EEXIST; | |
1322 | default: | |
1323 | goto out_gunlock; | |
1324 | }; | |
1325 | ||
1326 | if (odip != ndip) { | |
4f56110a | 1327 | if (!ndip->i_inode.i_nlink) { |
d192a8e5 | 1328 | error = -ENOENT; |
b3b94faa DT |
1329 | goto out_gunlock; |
1330 | } | |
ad6203f2 | 1331 | if (ndip->i_entries == (u32)-1) { |
b3b94faa DT |
1332 | error = -EFBIG; |
1333 | goto out_gunlock; | |
1334 | } | |
b60623c2 | 1335 | if (S_ISDIR(ip->i_inode.i_mode) && |
4f56110a | 1336 | ndip->i_inode.i_nlink == (u32)-1) { |
b3b94faa DT |
1337 | error = -EMLINK; |
1338 | goto out_gunlock; | |
1339 | } | |
1340 | } | |
1341 | } | |
1342 | ||
1343 | /* Check out the dir to be renamed */ | |
1344 | ||
1345 | if (dir_rename) { | |
10556cb2 | 1346 | error = gfs2_permission(odentry->d_inode, MAY_WRITE); |
b3b94faa DT |
1347 | if (error) |
1348 | goto out_gunlock; | |
1349 | } | |
1350 | ||
24b977b5 SW |
1351 | if (nip == NULL) |
1352 | alloc_required = gfs2_diradd_alloc_required(ndir, &ndentry->d_name); | |
1353 | error = alloc_required; | |
c752666c | 1354 | if (error < 0) |
b3b94faa | 1355 | goto out_gunlock; |
c752666c | 1356 | error = 0; |
b3b94faa DT |
1357 | |
1358 | if (alloc_required) { | |
564e12b1 BP |
1359 | struct gfs2_qadata *qa = gfs2_qadata_get(ndip); |
1360 | ||
1361 | if (!qa) { | |
182fe5ab CG |
1362 | error = -ENOMEM; |
1363 | goto out_gunlock; | |
1364 | } | |
b3b94faa | 1365 | |
d82661d9 | 1366 | error = gfs2_quota_lock_check(ndip); |
b3b94faa DT |
1367 | if (error) |
1368 | goto out_alloc; | |
1369 | ||
564e12b1 | 1370 | error = gfs2_inplace_reserve(ndip, sdp->sd_max_dirres); |
b3b94faa DT |
1371 | if (error) |
1372 | goto out_gunlock_q; | |
1373 | ||
fe1bdedc | 1374 | error = gfs2_trans_begin(sdp, sdp->sd_max_dirres + |
54335b1f | 1375 | gfs2_rg_blocks(ndip) + |
b3b94faa | 1376 | 4 * RES_DINODE + 4 * RES_LEAF + |
87d21e07 | 1377 | RES_STATFS + RES_QUOTA + 4, 0); |
b3b94faa DT |
1378 | if (error) |
1379 | goto out_ipreserv; | |
1380 | } else { | |
1381 | error = gfs2_trans_begin(sdp, 4 * RES_DINODE + | |
87d21e07 | 1382 | 5 * RES_LEAF + 4, 0); |
b3b94faa DT |
1383 | if (error) |
1384 | goto out_gunlock; | |
1385 | } | |
1386 | ||
1387 | /* Remove the target file, if it exists */ | |
1388 | ||
1389 | if (nip) { | |
855d23ce SW |
1390 | struct buffer_head *bh; |
1391 | error = gfs2_meta_inode_buffer(nip, &bh); | |
b3b94faa DT |
1392 | if (error) |
1393 | goto out_end_trans; | |
855d23ce SW |
1394 | error = gfs2_unlink_inode(ndip, ndentry, bh); |
1395 | brelse(bh); | |
b3b94faa DT |
1396 | } |
1397 | ||
1398 | if (dir_rename) { | |
8d123585 | 1399 | error = gfs2_dir_mvino(ip, &gfs2_qdotdot, ndip, DT_DIR); |
b3b94faa DT |
1400 | if (error) |
1401 | goto out_end_trans; | |
1402 | } else { | |
1403 | struct buffer_head *dibh; | |
1404 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1405 | if (error) | |
1406 | goto out_end_trans; | |
4bd91ba1 | 1407 | ip->i_inode.i_ctime = CURRENT_TIME; |
d4e9c4c3 | 1408 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
539e5d6b | 1409 | gfs2_dinode_out(ip, dibh->b_data); |
b3b94faa DT |
1410 | brelse(dibh); |
1411 | } | |
1412 | ||
855d23ce | 1413 | error = gfs2_dir_del(odip, odentry); |
b3b94faa DT |
1414 | if (error) |
1415 | goto out_end_trans; | |
1416 | ||
3d6ecb7d | 1417 | error = gfs2_dir_add(ndir, &ndentry->d_name, ip); |
b3b94faa DT |
1418 | if (error) |
1419 | goto out_end_trans; | |
1420 | ||
feaa7bba | 1421 | out_end_trans: |
b3b94faa | 1422 | gfs2_trans_end(sdp); |
feaa7bba | 1423 | out_ipreserv: |
b3b94faa DT |
1424 | if (alloc_required) |
1425 | gfs2_inplace_release(ndip); | |
feaa7bba | 1426 | out_gunlock_q: |
b3b94faa DT |
1427 | if (alloc_required) |
1428 | gfs2_quota_unlock(ndip); | |
feaa7bba | 1429 | out_alloc: |
b3b94faa | 1430 | if (alloc_required) |
564e12b1 | 1431 | gfs2_qadata_put(ndip); |
feaa7bba | 1432 | out_gunlock: |
72dbf479 BP |
1433 | while (x--) { |
1434 | gfs2_glock_dq(ghs + x); | |
b3b94faa | 1435 | gfs2_holder_uninit(ghs + x); |
72dbf479 | 1436 | } |
feaa7bba | 1437 | out_gunlock_r: |
0188d6c5 | 1438 | if (r_gh.gh_gl) |
b3b94faa | 1439 | gfs2_glock_dq_uninit(&r_gh); |
feaa7bba | 1440 | out: |
b3b94faa DT |
1441 | return error; |
1442 | } | |
1443 | ||
536baf02 | 1444 | /** |
c177c2ac AV |
1445 | * gfs2_follow_link - Follow a symbolic link |
1446 | * @dentry: The dentry of the link | |
1447 | * @nd: Data that we pass to vfs_follow_link() | |
536baf02 | 1448 | * |
c177c2ac | 1449 | * This can handle symlinks of any size. |
536baf02 | 1450 | * |
c177c2ac | 1451 | * Returns: 0 on success or error code |
536baf02 SW |
1452 | */ |
1453 | ||
c177c2ac | 1454 | static void *gfs2_follow_link(struct dentry *dentry, struct nameidata *nd) |
536baf02 | 1455 | { |
c177c2ac | 1456 | struct gfs2_inode *ip = GFS2_I(dentry->d_inode); |
536baf02 SW |
1457 | struct gfs2_holder i_gh; |
1458 | struct buffer_head *dibh; | |
160b4026 | 1459 | unsigned int size; |
c177c2ac | 1460 | char *buf; |
536baf02 SW |
1461 | int error; |
1462 | ||
1463 | gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh); | |
1464 | error = gfs2_glock_nq(&i_gh); | |
1465 | if (error) { | |
1466 | gfs2_holder_uninit(&i_gh); | |
c177c2ac AV |
1467 | nd_set_link(nd, ERR_PTR(error)); |
1468 | return NULL; | |
536baf02 SW |
1469 | } |
1470 | ||
a2e0f799 SW |
1471 | size = (unsigned int)i_size_read(&ip->i_inode); |
1472 | if (size == 0) { | |
536baf02 | 1473 | gfs2_consist_inode(ip); |
c177c2ac | 1474 | buf = ERR_PTR(-EIO); |
536baf02 SW |
1475 | goto out; |
1476 | } | |
1477 | ||
1478 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
c177c2ac AV |
1479 | if (error) { |
1480 | buf = ERR_PTR(error); | |
536baf02 | 1481 | goto out; |
536baf02 SW |
1482 | } |
1483 | ||
160b4026 | 1484 | buf = kzalloc(size + 1, GFP_NOFS); |
c177c2ac AV |
1485 | if (!buf) |
1486 | buf = ERR_PTR(-ENOMEM); | |
1487 | else | |
160b4026 | 1488 | memcpy(buf, dibh->b_data + sizeof(struct gfs2_dinode), size); |
536baf02 SW |
1489 | brelse(dibh); |
1490 | out: | |
1491 | gfs2_glock_dq_uninit(&i_gh); | |
c177c2ac AV |
1492 | nd_set_link(nd, buf); |
1493 | return NULL; | |
b3b94faa DT |
1494 | } |
1495 | ||
c177c2ac | 1496 | static void gfs2_put_link(struct dentry *dentry, struct nameidata *nd, void *p) |
b3b94faa | 1497 | { |
c177c2ac AV |
1498 | char *s = nd_get_link(nd); |
1499 | if (!IS_ERR(s)) | |
1500 | kfree(s); | |
b3b94faa DT |
1501 | } |
1502 | ||
1503 | /** | |
1504 | * gfs2_permission - | |
75d5cfbe SW |
1505 | * @inode: The inode |
1506 | * @mask: The mask to be tested | |
1507 | * @flags: Indicates whether this is an RCU path walk or not | |
b3b94faa | 1508 | * |
300c7d75 SW |
1509 | * This may be called from the VFS directly, or from within GFS2 with the |
1510 | * inode locked, so we look to see if the glock is already locked and only | |
1511 | * lock the glock if its not already been done. | |
1512 | * | |
b3b94faa DT |
1513 | * Returns: errno |
1514 | */ | |
1515 | ||
10556cb2 | 1516 | int gfs2_permission(struct inode *inode, int mask) |
b3b94faa | 1517 | { |
b74c79e9 | 1518 | struct gfs2_inode *ip; |
b3b94faa DT |
1519 | struct gfs2_holder i_gh; |
1520 | int error; | |
300c7d75 | 1521 | int unlock = 0; |
b3b94faa | 1522 | |
b74c79e9 NP |
1523 | |
1524 | ip = GFS2_I(inode); | |
7afd88d9 | 1525 | if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) { |
10556cb2 | 1526 | if (mask & MAY_NOT_BLOCK) |
75d5cfbe | 1527 | return -ECHILD; |
300c7d75 SW |
1528 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh); |
1529 | if (error) | |
1530 | return error; | |
1531 | unlock = 1; | |
1532 | } | |
b3b94faa | 1533 | |
f58ba889 MS |
1534 | if ((mask & MAY_WRITE) && IS_IMMUTABLE(inode)) |
1535 | error = -EACCES; | |
1536 | else | |
2830ba7f | 1537 | error = generic_permission(inode, mask); |
300c7d75 | 1538 | if (unlock) |
b3b94faa | 1539 | gfs2_glock_dq_uninit(&i_gh); |
b3b94faa DT |
1540 | |
1541 | return error; | |
1542 | } | |
1543 | ||
ab9bbda0 | 1544 | static int __gfs2_setattr_simple(struct inode *inode, struct iattr *attr) |
194c011f | 1545 | { |
194c011f SW |
1546 | setattr_copy(inode, attr); |
1547 | mark_inode_dirty(inode); | |
194c011f SW |
1548 | return 0; |
1549 | } | |
1550 | ||
1551 | /** | |
1552 | * gfs2_setattr_simple - | |
1553 | * @ip: | |
1554 | * @attr: | |
1555 | * | |
1556 | * Returns: errno | |
1557 | */ | |
1558 | ||
ab9bbda0 | 1559 | int gfs2_setattr_simple(struct inode *inode, struct iattr *attr) |
194c011f SW |
1560 | { |
1561 | int error; | |
1562 | ||
1563 | if (current->journal_info) | |
ab9bbda0 | 1564 | return __gfs2_setattr_simple(inode, attr); |
194c011f | 1565 | |
ab9bbda0 | 1566 | error = gfs2_trans_begin(GFS2_SB(inode), RES_DINODE, 0); |
194c011f SW |
1567 | if (error) |
1568 | return error; | |
1569 | ||
ab9bbda0 SW |
1570 | error = __gfs2_setattr_simple(inode, attr); |
1571 | gfs2_trans_end(GFS2_SB(inode)); | |
194c011f SW |
1572 | return error; |
1573 | } | |
1574 | ||
b3b94faa DT |
1575 | static int setattr_chown(struct inode *inode, struct iattr *attr) |
1576 | { | |
feaa7bba SW |
1577 | struct gfs2_inode *ip = GFS2_I(inode); |
1578 | struct gfs2_sbd *sdp = GFS2_SB(inode); | |
cd915493 | 1579 | u32 ouid, ogid, nuid, ngid; |
b3b94faa DT |
1580 | int error; |
1581 | ||
2933f925 SW |
1582 | ouid = inode->i_uid; |
1583 | ogid = inode->i_gid; | |
b3b94faa DT |
1584 | nuid = attr->ia_uid; |
1585 | ngid = attr->ia_gid; | |
1586 | ||
1587 | if (!(attr->ia_valid & ATTR_UID) || ouid == nuid) | |
1588 | ouid = nuid = NO_QUOTA_CHANGE; | |
1589 | if (!(attr->ia_valid & ATTR_GID) || ogid == ngid) | |
1590 | ogid = ngid = NO_QUOTA_CHANGE; | |
1591 | ||
564e12b1 | 1592 | if (!gfs2_qadata_get(ip)) |
182fe5ab | 1593 | return -ENOMEM; |
b3b94faa DT |
1594 | |
1595 | error = gfs2_quota_lock(ip, nuid, ngid); | |
1596 | if (error) | |
1597 | goto out_alloc; | |
1598 | ||
1599 | if (ouid != NO_QUOTA_CHANGE || ogid != NO_QUOTA_CHANGE) { | |
1600 | error = gfs2_quota_check(ip, nuid, ngid); | |
1601 | if (error) | |
1602 | goto out_gunlock_q; | |
1603 | } | |
1604 | ||
1605 | error = gfs2_trans_begin(sdp, RES_DINODE + 2 * RES_QUOTA, 0); | |
1606 | if (error) | |
1607 | goto out_gunlock_q; | |
1608 | ||
ab9bbda0 | 1609 | error = gfs2_setattr_simple(inode, attr); |
b3b94faa DT |
1610 | if (error) |
1611 | goto out_end_trans; | |
1612 | ||
b3b94faa | 1613 | if (ouid != NO_QUOTA_CHANGE || ogid != NO_QUOTA_CHANGE) { |
77658aad SW |
1614 | u64 blocks = gfs2_get_inode_blocks(&ip->i_inode); |
1615 | gfs2_quota_change(ip, -blocks, ouid, ogid); | |
1616 | gfs2_quota_change(ip, blocks, nuid, ngid); | |
b3b94faa DT |
1617 | } |
1618 | ||
a91ea69f | 1619 | out_end_trans: |
b3b94faa | 1620 | gfs2_trans_end(sdp); |
a91ea69f | 1621 | out_gunlock_q: |
b3b94faa | 1622 | gfs2_quota_unlock(ip); |
a91ea69f | 1623 | out_alloc: |
564e12b1 | 1624 | gfs2_qadata_put(ip); |
b3b94faa DT |
1625 | return error; |
1626 | } | |
1627 | ||
1628 | /** | |
1629 | * gfs2_setattr - Change attributes on an inode | |
1630 | * @dentry: The dentry which is changing | |
1631 | * @attr: The structure describing the change | |
1632 | * | |
1633 | * The VFS layer wants to change one or more of an inodes attributes. Write | |
1634 | * that change out to disk. | |
1635 | * | |
1636 | * Returns: errno | |
1637 | */ | |
1638 | ||
1639 | static int gfs2_setattr(struct dentry *dentry, struct iattr *attr) | |
1640 | { | |
1641 | struct inode *inode = dentry->d_inode; | |
feaa7bba | 1642 | struct gfs2_inode *ip = GFS2_I(inode); |
b3b94faa DT |
1643 | struct gfs2_holder i_gh; |
1644 | int error; | |
1645 | ||
b3b94faa DT |
1646 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); |
1647 | if (error) | |
1648 | return error; | |
1649 | ||
1650 | error = -EPERM; | |
1651 | if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) | |
1652 | goto out; | |
1653 | ||
1654 | error = inode_change_ok(inode, attr); | |
1655 | if (error) | |
1656 | goto out; | |
1657 | ||
1658 | if (attr->ia_valid & ATTR_SIZE) | |
ff8f33c8 | 1659 | error = gfs2_setattr_size(inode, attr->ia_size); |
b3b94faa DT |
1660 | else if (attr->ia_valid & (ATTR_UID | ATTR_GID)) |
1661 | error = setattr_chown(inode, attr); | |
1662 | else if ((attr->ia_valid & ATTR_MODE) && IS_POSIXACL(inode)) | |
1663 | error = gfs2_acl_chmod(ip, attr); | |
1664 | else | |
ab9bbda0 | 1665 | error = gfs2_setattr_simple(inode, attr); |
b3b94faa | 1666 | |
a91ea69f | 1667 | out: |
b3b94faa DT |
1668 | if (!error) |
1669 | mark_inode_dirty(inode); | |
ab9bbda0 | 1670 | gfs2_glock_dq_uninit(&i_gh); |
b3b94faa DT |
1671 | return error; |
1672 | } | |
1673 | ||
1674 | /** | |
1675 | * gfs2_getattr - Read out an inode's attributes | |
26c1a574 | 1676 | * @mnt: The vfsmount the inode is being accessed from |
b3b94faa DT |
1677 | * @dentry: The dentry to stat |
1678 | * @stat: The inode's stats | |
1679 | * | |
dcf3dd85 SW |
1680 | * This may be called from the VFS directly, or from within GFS2 with the |
1681 | * inode locked, so we look to see if the glock is already locked and only | |
1682 | * lock the glock if its not already been done. Note that its the NFS | |
1683 | * readdirplus operation which causes this to be called (from filldir) | |
1684 | * with the glock already held. | |
1685 | * | |
b3b94faa DT |
1686 | * Returns: errno |
1687 | */ | |
1688 | ||
1689 | static int gfs2_getattr(struct vfsmount *mnt, struct dentry *dentry, | |
1690 | struct kstat *stat) | |
1691 | { | |
1692 | struct inode *inode = dentry->d_inode; | |
feaa7bba | 1693 | struct gfs2_inode *ip = GFS2_I(inode); |
b3b94faa DT |
1694 | struct gfs2_holder gh; |
1695 | int error; | |
dcf3dd85 | 1696 | int unlock = 0; |
b3b94faa | 1697 | |
7afd88d9 | 1698 | if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) { |
dcf3dd85 SW |
1699 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); |
1700 | if (error) | |
1701 | return error; | |
1702 | unlock = 1; | |
b3b94faa DT |
1703 | } |
1704 | ||
dcf3dd85 | 1705 | generic_fillattr(inode, stat); |
d7c103d0 | 1706 | if (unlock) |
dcf3dd85 SW |
1707 | gfs2_glock_dq_uninit(&gh); |
1708 | ||
1709 | return 0; | |
b3b94faa DT |
1710 | } |
1711 | ||
1712 | static int gfs2_setxattr(struct dentry *dentry, const char *name, | |
1713 | const void *data, size_t size, int flags) | |
1714 | { | |
feaa7bba | 1715 | struct inode *inode = dentry->d_inode; |
40b78a32 SW |
1716 | struct gfs2_inode *ip = GFS2_I(inode); |
1717 | struct gfs2_holder gh; | |
1718 | int ret; | |
b3b94faa | 1719 | |
40b78a32 SW |
1720 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); |
1721 | ret = gfs2_glock_nq(&gh); | |
1722 | if (ret == 0) { | |
1723 | ret = generic_setxattr(dentry, name, data, size, flags); | |
1724 | gfs2_glock_dq(&gh); | |
1725 | } | |
1726 | gfs2_holder_uninit(&gh); | |
1727 | return ret; | |
b3b94faa DT |
1728 | } |
1729 | ||
1730 | static ssize_t gfs2_getxattr(struct dentry *dentry, const char *name, | |
1731 | void *data, size_t size) | |
1732 | { | |
40b78a32 SW |
1733 | struct inode *inode = dentry->d_inode; |
1734 | struct gfs2_inode *ip = GFS2_I(inode); | |
1735 | struct gfs2_holder gh; | |
1736 | int ret; | |
b3b94faa | 1737 | |
40b78a32 SW |
1738 | gfs2_holder_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); |
1739 | ret = gfs2_glock_nq(&gh); | |
1740 | if (ret == 0) { | |
1741 | ret = generic_getxattr(dentry, name, data, size); | |
1742 | gfs2_glock_dq(&gh); | |
1743 | } | |
1744 | gfs2_holder_uninit(&gh); | |
1745 | return ret; | |
b3b94faa DT |
1746 | } |
1747 | ||
1748 | static int gfs2_removexattr(struct dentry *dentry, const char *name) | |
1749 | { | |
40b78a32 SW |
1750 | struct inode *inode = dentry->d_inode; |
1751 | struct gfs2_inode *ip = GFS2_I(inode); | |
1752 | struct gfs2_holder gh; | |
1753 | int ret; | |
b3b94faa | 1754 | |
40b78a32 SW |
1755 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); |
1756 | ret = gfs2_glock_nq(&gh); | |
1757 | if (ret == 0) { | |
1758 | ret = generic_removexattr(dentry, name); | |
1759 | gfs2_glock_dq(&gh); | |
1760 | } | |
1761 | gfs2_holder_uninit(&gh); | |
1762 | return ret; | |
b3b94faa DT |
1763 | } |
1764 | ||
e9079cce SW |
1765 | static int gfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, |
1766 | u64 start, u64 len) | |
1767 | { | |
1768 | struct gfs2_inode *ip = GFS2_I(inode); | |
1769 | struct gfs2_holder gh; | |
1770 | int ret; | |
1771 | ||
1772 | ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC); | |
1773 | if (ret) | |
1774 | return ret; | |
1775 | ||
1776 | mutex_lock(&inode->i_mutex); | |
1777 | ||
1778 | ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh); | |
1779 | if (ret) | |
1780 | goto out; | |
1781 | ||
1782 | if (gfs2_is_stuffed(ip)) { | |
1783 | u64 phys = ip->i_no_addr << inode->i_blkbits; | |
1784 | u64 size = i_size_read(inode); | |
1785 | u32 flags = FIEMAP_EXTENT_LAST|FIEMAP_EXTENT_NOT_ALIGNED| | |
1786 | FIEMAP_EXTENT_DATA_INLINE; | |
1787 | phys += sizeof(struct gfs2_dinode); | |
1788 | phys += start; | |
1789 | if (start + len > size) | |
1790 | len = size - start; | |
1791 | if (start < size) | |
1792 | ret = fiemap_fill_next_extent(fieinfo, start, phys, | |
1793 | len, flags); | |
1794 | if (ret == 1) | |
1795 | ret = 0; | |
1796 | } else { | |
1797 | ret = __generic_block_fiemap(inode, fieinfo, start, len, | |
1798 | gfs2_block_map); | |
1799 | } | |
1800 | ||
1801 | gfs2_glock_dq_uninit(&gh); | |
1802 | out: | |
1803 | mutex_unlock(&inode->i_mutex); | |
1804 | return ret; | |
1805 | } | |
1806 | ||
92e1d5be | 1807 | const struct inode_operations gfs2_file_iops = { |
e6305c43 | 1808 | .permission = gfs2_permission, |
b3b94faa DT |
1809 | .setattr = gfs2_setattr, |
1810 | .getattr = gfs2_getattr, | |
1811 | .setxattr = gfs2_setxattr, | |
1812 | .getxattr = gfs2_getxattr, | |
1813 | .listxattr = gfs2_listxattr, | |
1814 | .removexattr = gfs2_removexattr, | |
e9079cce | 1815 | .fiemap = gfs2_fiemap, |
4e34e719 | 1816 | .get_acl = gfs2_get_acl, |
b3b94faa DT |
1817 | }; |
1818 | ||
92e1d5be | 1819 | const struct inode_operations gfs2_dir_iops = { |
b3b94faa DT |
1820 | .create = gfs2_create, |
1821 | .lookup = gfs2_lookup, | |
1822 | .link = gfs2_link, | |
1823 | .unlink = gfs2_unlink, | |
1824 | .symlink = gfs2_symlink, | |
1825 | .mkdir = gfs2_mkdir, | |
855d23ce | 1826 | .rmdir = gfs2_unlink, |
b3b94faa DT |
1827 | .mknod = gfs2_mknod, |
1828 | .rename = gfs2_rename, | |
e6305c43 | 1829 | .permission = gfs2_permission, |
b3b94faa DT |
1830 | .setattr = gfs2_setattr, |
1831 | .getattr = gfs2_getattr, | |
1832 | .setxattr = gfs2_setxattr, | |
1833 | .getxattr = gfs2_getxattr, | |
1834 | .listxattr = gfs2_listxattr, | |
1835 | .removexattr = gfs2_removexattr, | |
e9079cce | 1836 | .fiemap = gfs2_fiemap, |
4e34e719 | 1837 | .get_acl = gfs2_get_acl, |
b3b94faa DT |
1838 | }; |
1839 | ||
92e1d5be | 1840 | const struct inode_operations gfs2_symlink_iops = { |
c177c2ac | 1841 | .readlink = generic_readlink, |
b3b94faa | 1842 | .follow_link = gfs2_follow_link, |
c177c2ac | 1843 | .put_link = gfs2_put_link, |
e6305c43 | 1844 | .permission = gfs2_permission, |
b3b94faa DT |
1845 | .setattr = gfs2_setattr, |
1846 | .getattr = gfs2_getattr, | |
1847 | .setxattr = gfs2_setxattr, | |
1848 | .getxattr = gfs2_getxattr, | |
1849 | .listxattr = gfs2_listxattr, | |
1850 | .removexattr = gfs2_removexattr, | |
e9079cce | 1851 | .fiemap = gfs2_fiemap, |
4e34e719 | 1852 | .get_acl = gfs2_get_acl, |
b3b94faa DT |
1853 | }; |
1854 |