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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 | ||
3ce37b2c AG |
40 | static struct inode *gfs2_iget(struct super_block *sb, u64 no_addr) |
41 | { | |
42 | struct inode *inode; | |
43 | ||
44 | repeat: | |
45 | inode = iget_locked(sb, no_addr); | |
46 | if (!inode) | |
47 | return inode; | |
48 | if (is_bad_inode(inode)) { | |
49 | iput(inode); | |
50 | goto repeat; | |
51 | } | |
52 | GFS2_I(inode)->i_no_addr = no_addr; | |
53 | return inode; | |
194c011f SW |
54 | } |
55 | ||
56 | /** | |
57 | * gfs2_set_iop - Sets inode operations | |
58 | * @inode: The inode with correct i_mode filled in | |
59 | * | |
60 | * GFS2 lookup code fills in vfs inode contents based on info obtained | |
61 | * from directory entry inside gfs2_inode_lookup(). | |
62 | */ | |
63 | ||
64 | static void gfs2_set_iop(struct inode *inode) | |
65 | { | |
66 | struct gfs2_sbd *sdp = GFS2_SB(inode); | |
67 | umode_t mode = inode->i_mode; | |
68 | ||
69 | if (S_ISREG(mode)) { | |
70 | inode->i_op = &gfs2_file_iops; | |
71 | if (gfs2_localflocks(sdp)) | |
72 | inode->i_fop = &gfs2_file_fops_nolock; | |
73 | else | |
74 | inode->i_fop = &gfs2_file_fops; | |
75 | } else if (S_ISDIR(mode)) { | |
76 | inode->i_op = &gfs2_dir_iops; | |
77 | if (gfs2_localflocks(sdp)) | |
78 | inode->i_fop = &gfs2_dir_fops_nolock; | |
79 | else | |
80 | inode->i_fop = &gfs2_dir_fops; | |
81 | } else if (S_ISLNK(mode)) { | |
82 | inode->i_op = &gfs2_symlink_iops; | |
83 | } else { | |
84 | inode->i_op = &gfs2_file_iops; | |
85 | init_special_inode(inode, inode->i_mode, inode->i_rdev); | |
86 | } | |
87 | } | |
88 | ||
89 | /** | |
90 | * gfs2_inode_lookup - Lookup an inode | |
91 | * @sb: The super block | |
194c011f | 92 | * @type: The type of the inode |
3ce37b2c AG |
93 | * @no_addr: The inode number |
94 | * @no_formal_ino: The inode generation number | |
95 | * @blktype: Requested block type (GFS2_BLKST_DINODE or GFS2_BLKST_UNLINKED; | |
96 | * GFS2_BLKST_FREE do indicate not to verify) | |
97 | * | |
98 | * If @type is DT_UNKNOWN, the inode type is fetched from disk. | |
99 | * | |
100 | * If @blktype is anything other than GFS2_BLKST_FREE (which is used as a | |
101 | * placeholder because it doesn't otherwise make sense), the on-disk block type | |
102 | * is verified to be @blktype. | |
194c011f SW |
103 | * |
104 | * Returns: A VFS inode, or an error | |
105 | */ | |
106 | ||
107 | struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned int type, | |
3ce37b2c AG |
108 | u64 no_addr, u64 no_formal_ino, |
109 | unsigned int blktype) | |
194c011f SW |
110 | { |
111 | struct inode *inode; | |
112 | struct gfs2_inode *ip; | |
113 | struct gfs2_glock *io_gl = NULL; | |
3ce37b2c AG |
114 | struct gfs2_holder i_gh; |
115 | bool unlock = false; | |
194c011f SW |
116 | int error; |
117 | ||
3ce37b2c | 118 | inode = gfs2_iget(sb, no_addr); |
194c011f | 119 | if (!inode) |
ac3beb6a | 120 | return ERR_PTR(-ENOMEM); |
194c011f | 121 | |
e97321fa | 122 | ip = GFS2_I(inode); |
e97321fa | 123 | |
194c011f SW |
124 | if (inode->i_state & I_NEW) { |
125 | struct gfs2_sbd *sdp = GFS2_SB(inode); | |
126 | ip->i_no_formal_ino = no_formal_ino; | |
127 | ||
128 | error = gfs2_glock_get(sdp, no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl); | |
129 | if (unlikely(error)) | |
130 | goto fail; | |
131 | ip->i_gl->gl_object = ip; | |
132 | ||
133 | error = gfs2_glock_get(sdp, no_addr, &gfs2_iopen_glops, CREATE, &io_gl); | |
134 | if (unlikely(error)) | |
135 | goto fail_put; | |
136 | ||
3ce37b2c AG |
137 | if (type == DT_UNKNOWN || blktype != GFS2_BLKST_FREE) { |
138 | /* | |
139 | * The GL_SKIP flag indicates to skip reading the inode | |
140 | * block. We read the inode with gfs2_inode_refresh | |
141 | * after possibly checking the block type. | |
142 | */ | |
143 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, | |
144 | GL_SKIP, &i_gh); | |
145 | if (error) | |
146 | goto fail_put; | |
147 | unlock = true; | |
148 | ||
149 | if (blktype != GFS2_BLKST_FREE) { | |
150 | error = gfs2_check_blk_type(sdp, no_addr, | |
151 | blktype); | |
152 | if (error) | |
153 | goto fail_put; | |
154 | } | |
155 | } | |
156 | ||
194c011f SW |
157 | set_bit(GIF_INVALID, &ip->i_flags); |
158 | error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh); | |
159 | if (unlikely(error)) | |
3ce37b2c | 160 | goto fail_put; |
194c011f SW |
161 | |
162 | ip->i_iopen_gh.gh_gl->gl_object = ip; | |
163 | gfs2_glock_put(io_gl); | |
164 | io_gl = NULL; | |
165 | ||
166 | if (type == DT_UNKNOWN) { | |
167 | /* Inode glock must be locked already */ | |
168 | error = gfs2_inode_refresh(GFS2_I(inode)); | |
169 | if (error) | |
170 | goto fail_refresh; | |
171 | } else { | |
172 | inode->i_mode = DT2IF(type); | |
173 | } | |
174 | ||
175 | gfs2_set_iop(inode); | |
176 | unlock_new_inode(inode); | |
177 | } | |
178 | ||
3ce37b2c AG |
179 | if (unlock) |
180 | gfs2_glock_dq_uninit(&i_gh); | |
194c011f SW |
181 | return inode; |
182 | ||
183 | fail_refresh: | |
a6a4d98b | 184 | ip->i_iopen_gh.gh_flags |= GL_NOCACHE; |
194c011f | 185 | ip->i_iopen_gh.gh_gl->gl_object = NULL; |
86d067a7 BP |
186 | gfs2_glock_dq_wait(&ip->i_iopen_gh); |
187 | gfs2_holder_uninit(&ip->i_iopen_gh); | |
3ce37b2c | 188 | fail_put: |
194c011f SW |
189 | if (io_gl) |
190 | gfs2_glock_put(io_gl); | |
3ce37b2c AG |
191 | if (unlock) |
192 | gfs2_glock_dq_uninit(&i_gh); | |
194c011f | 193 | ip->i_gl->gl_object = NULL; |
194c011f SW |
194 | fail: |
195 | iget_failed(inode); | |
196 | return ERR_PTR(error); | |
197 | } | |
198 | ||
199 | struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr, | |
200 | u64 *no_formal_ino, unsigned int blktype) | |
201 | { | |
202 | struct super_block *sb = sdp->sd_vfs; | |
3ce37b2c | 203 | struct inode *inode; |
194c011f SW |
204 | int error; |
205 | ||
3ce37b2c | 206 | inode = gfs2_inode_lookup(sb, DT_UNKNOWN, no_addr, 0, blktype); |
194c011f | 207 | if (IS_ERR(inode)) |
3ce37b2c | 208 | return inode; |
194c011f SW |
209 | |
210 | /* Two extra checks for NFS only */ | |
211 | if (no_formal_ino) { | |
212 | error = -ESTALE; | |
213 | if (GFS2_I(inode)->i_no_formal_ino != *no_formal_ino) | |
214 | goto fail_iput; | |
215 | ||
216 | error = -EIO; | |
217 | if (GFS2_I(inode)->i_diskflags & GFS2_DIF_SYSTEM) | |
218 | goto fail_iput; | |
194c011f | 219 | } |
3ce37b2c | 220 | return inode; |
194c011f | 221 | |
194c011f SW |
222 | fail_iput: |
223 | iput(inode); | |
3ce37b2c | 224 | return ERR_PTR(error); |
194c011f SW |
225 | } |
226 | ||
227 | ||
228 | struct inode *gfs2_lookup_simple(struct inode *dip, const char *name) | |
229 | { | |
230 | struct qstr qstr; | |
231 | struct inode *inode; | |
232 | gfs2_str2qstr(&qstr, name); | |
233 | inode = gfs2_lookupi(dip, &qstr, 1); | |
234 | /* gfs2_lookupi has inconsistent callers: vfs | |
235 | * related routines expect NULL for no entry found, | |
236 | * gfs2_lookup_simple callers expect ENOENT | |
237 | * and do not check for NULL. | |
238 | */ | |
239 | if (inode == NULL) | |
240 | return ERR_PTR(-ENOENT); | |
241 | else | |
242 | return inode; | |
243 | } | |
244 | ||
245 | ||
246 | /** | |
247 | * gfs2_lookupi - Look up a filename in a directory and return its inode | |
248 | * @d_gh: An initialized holder for the directory glock | |
249 | * @name: The name of the inode to look for | |
250 | * @is_root: If 1, ignore the caller's permissions | |
251 | * @i_gh: An uninitialized holder for the new inode glock | |
252 | * | |
253 | * This can be called via the VFS filldir function when NFS is doing | |
254 | * a readdirplus and the inode which its intending to stat isn't | |
255 | * already in cache. In this case we must not take the directory glock | |
256 | * again, since the readdir call will have already taken that lock. | |
257 | * | |
258 | * Returns: errno | |
259 | */ | |
260 | ||
261 | struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name, | |
262 | int is_root) | |
263 | { | |
264 | struct super_block *sb = dir->i_sb; | |
265 | struct gfs2_inode *dip = GFS2_I(dir); | |
266 | struct gfs2_holder d_gh; | |
267 | int error = 0; | |
268 | struct inode *inode = NULL; | |
269 | int unlock = 0; | |
270 | ||
271 | if (!name->len || name->len > GFS2_FNAMESIZE) | |
272 | return ERR_PTR(-ENAMETOOLONG); | |
273 | ||
274 | if ((name->len == 1 && memcmp(name->name, ".", 1) == 0) || | |
275 | (name->len == 2 && memcmp(name->name, "..", 2) == 0 && | |
2b0143b5 | 276 | dir == d_inode(sb->s_root))) { |
194c011f SW |
277 | igrab(dir); |
278 | return dir; | |
279 | } | |
280 | ||
281 | if (gfs2_glock_is_locked_by_me(dip->i_gl) == NULL) { | |
282 | error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh); | |
283 | if (error) | |
284 | return ERR_PTR(error); | |
285 | unlock = 1; | |
286 | } | |
287 | ||
288 | if (!is_root) { | |
10556cb2 | 289 | error = gfs2_permission(dir, MAY_EXEC); |
194c011f SW |
290 | if (error) |
291 | goto out; | |
292 | } | |
293 | ||
5a00f3cc | 294 | inode = gfs2_dir_search(dir, name, false); |
194c011f SW |
295 | if (IS_ERR(inode)) |
296 | error = PTR_ERR(inode); | |
297 | out: | |
298 | if (unlock) | |
299 | gfs2_glock_dq_uninit(&d_gh); | |
300 | if (error == -ENOENT) | |
301 | return NULL; | |
302 | return inode ? inode : ERR_PTR(error); | |
303 | } | |
304 | ||
305 | /** | |
306 | * create_ok - OK to create a new on-disk inode here? | |
307 | * @dip: Directory in which dinode is to be created | |
308 | * @name: Name of new dinode | |
309 | * @mode: | |
310 | * | |
311 | * Returns: errno | |
312 | */ | |
313 | ||
314 | static int create_ok(struct gfs2_inode *dip, const struct qstr *name, | |
175a4eb7 | 315 | umode_t mode) |
194c011f SW |
316 | { |
317 | int error; | |
318 | ||
10556cb2 | 319 | error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC); |
194c011f SW |
320 | if (error) |
321 | return error; | |
322 | ||
323 | /* Don't create entries in an unlinked directory */ | |
324 | if (!dip->i_inode.i_nlink) | |
325 | return -ENOENT; | |
326 | ||
194c011f SW |
327 | if (dip->i_entries == (u32)-1) |
328 | return -EFBIG; | |
329 | if (S_ISDIR(mode) && dip->i_inode.i_nlink == (u32)-1) | |
330 | return -EMLINK; | |
331 | ||
332 | return 0; | |
333 | } | |
334 | ||
c9aecf73 SW |
335 | static void munge_mode_uid_gid(const struct gfs2_inode *dip, |
336 | struct inode *inode) | |
194c011f SW |
337 | { |
338 | if (GFS2_SB(&dip->i_inode)->sd_args.ar_suiddir && | |
6b24c0d2 EB |
339 | (dip->i_inode.i_mode & S_ISUID) && |
340 | !uid_eq(dip->i_inode.i_uid, GLOBAL_ROOT_UID)) { | |
c9aecf73 SW |
341 | if (S_ISDIR(inode->i_mode)) |
342 | inode->i_mode |= S_ISUID; | |
6b24c0d2 | 343 | else if (!uid_eq(dip->i_inode.i_uid, current_fsuid())) |
c9aecf73 SW |
344 | inode->i_mode &= ~07111; |
345 | inode->i_uid = dip->i_inode.i_uid; | |
194c011f | 346 | } else |
c9aecf73 | 347 | inode->i_uid = current_fsuid(); |
194c011f SW |
348 | |
349 | if (dip->i_inode.i_mode & S_ISGID) { | |
c9aecf73 SW |
350 | if (S_ISDIR(inode->i_mode)) |
351 | inode->i_mode |= S_ISGID; | |
352 | inode->i_gid = dip->i_inode.i_gid; | |
194c011f | 353 | } else |
c9aecf73 | 354 | inode->i_gid = current_fsgid(); |
194c011f SW |
355 | } |
356 | ||
b2c8b3ea | 357 | static int alloc_dinode(struct gfs2_inode *ip, u32 flags, unsigned *dblocks) |
194c011f | 358 | { |
c9aecf73 | 359 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b2c8b3ea | 360 | struct gfs2_alloc_parms ap = { .target = *dblocks, .aflags = flags, }; |
194c011f SW |
361 | int error; |
362 | ||
b8fbf471 | 363 | error = gfs2_quota_lock_check(ip, &ap); |
194c011f SW |
364 | if (error) |
365 | goto out; | |
366 | ||
7b9cff46 | 367 | error = gfs2_inplace_reserve(ip, &ap); |
fd4b4e04 SW |
368 | if (error) |
369 | goto out_quota; | |
370 | ||
b2c8b3ea | 371 | error = gfs2_trans_begin(sdp, (*dblocks * RES_RG_BIT) + RES_STATFS + RES_QUOTA, 0); |
194c011f SW |
372 | if (error) |
373 | goto out_ipreserv; | |
374 | ||
b2c8b3ea | 375 | error = gfs2_alloc_blocks(ip, &ip->i_no_addr, dblocks, 1, &ip->i_generation); |
c9aecf73 SW |
376 | ip->i_no_formal_ino = ip->i_generation; |
377 | ip->i_inode.i_ino = ip->i_no_addr; | |
378 | ip->i_goal = ip->i_no_addr; | |
194c011f SW |
379 | |
380 | gfs2_trans_end(sdp); | |
381 | ||
382 | out_ipreserv: | |
c9aecf73 | 383 | gfs2_inplace_release(ip); |
fd4b4e04 SW |
384 | out_quota: |
385 | gfs2_quota_unlock(ip); | |
194c011f | 386 | out: |
194c011f SW |
387 | return error; |
388 | } | |
389 | ||
f2741d98 SW |
390 | static void gfs2_init_dir(struct buffer_head *dibh, |
391 | const struct gfs2_inode *parent) | |
e2d0a13b SW |
392 | { |
393 | struct gfs2_dinode *di = (struct gfs2_dinode *)dibh->b_data; | |
394 | struct gfs2_dirent *dent = (struct gfs2_dirent *)(di+1); | |
395 | ||
396 | gfs2_qstr2dirent(&gfs2_qdot, GFS2_DIRENT_SIZE(gfs2_qdot.len), dent); | |
397 | dent->de_inum = di->di_num; /* already GFS2 endian */ | |
398 | dent->de_type = cpu_to_be16(DT_DIR); | |
399 | ||
400 | dent = (struct gfs2_dirent *)((char*)dent + GFS2_DIRENT_SIZE(1)); | |
401 | gfs2_qstr2dirent(&gfs2_qdotdot, dibh->b_size - GFS2_DIRENT_SIZE(1) - sizeof(struct gfs2_dinode), dent); | |
402 | gfs2_inum_out(parent, dent); | |
403 | dent->de_type = cpu_to_be16(DT_DIR); | |
404 | ||
405 | } | |
406 | ||
b2c8b3ea SW |
407 | /** |
408 | * gfs2_init_xattr - Initialise an xattr block for a new inode | |
409 | * @ip: The inode in question | |
410 | * | |
411 | * This sets up an empty xattr block for a new inode, ready to | |
412 | * take any ACLs, LSM xattrs, etc. | |
413 | */ | |
414 | ||
415 | static void gfs2_init_xattr(struct gfs2_inode *ip) | |
416 | { | |
417 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); | |
418 | struct buffer_head *bh; | |
419 | struct gfs2_ea_header *ea; | |
420 | ||
421 | bh = gfs2_meta_new(ip->i_gl, ip->i_eattr); | |
422 | gfs2_trans_add_meta(ip->i_gl, bh); | |
423 | gfs2_metatype_set(bh, GFS2_METATYPE_EA, GFS2_FORMAT_EA); | |
424 | gfs2_buffer_clear_tail(bh, sizeof(struct gfs2_meta_header)); | |
425 | ||
426 | ea = GFS2_EA_BH2FIRST(bh); | |
427 | ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize); | |
428 | ea->ea_type = GFS2_EATYPE_UNUSED; | |
429 | ea->ea_flags = GFS2_EAFLAG_LAST; | |
430 | ||
431 | brelse(bh); | |
432 | } | |
433 | ||
194c011f SW |
434 | /** |
435 | * init_dinode - Fill in a new dinode structure | |
f2741d98 | 436 | * @dip: The directory this inode is being created in |
c9aecf73 | 437 | * @ip: The inode |
f2741d98 | 438 | * @symname: The symlink destination (if a symlink) |
f2741d98 | 439 | * @bhp: The buffer head (returned to caller) |
194c011f SW |
440 | * |
441 | */ | |
442 | ||
c9aecf73 | 443 | static void init_dinode(struct gfs2_inode *dip, struct gfs2_inode *ip, |
79ba7480 | 444 | const char *symname) |
194c011f | 445 | { |
194c011f SW |
446 | struct gfs2_dinode *di; |
447 | struct buffer_head *dibh; | |
194c011f | 448 | |
c9aecf73 | 449 | dibh = gfs2_meta_new(ip->i_gl, ip->i_no_addr); |
350a9b0a | 450 | gfs2_trans_add_meta(ip->i_gl, dibh); |
194c011f | 451 | di = (struct gfs2_dinode *)dibh->b_data; |
79ba7480 | 452 | gfs2_dinode_out(ip, di); |
194c011f | 453 | |
c9aecf73 SW |
454 | di->di_major = cpu_to_be32(MAJOR(ip->i_inode.i_rdev)); |
455 | di->di_minor = cpu_to_be32(MINOR(ip->i_inode.i_rdev)); | |
194c011f | 456 | di->__pad1 = 0; |
194c011f SW |
457 | di->__pad2 = 0; |
458 | di->__pad3 = 0; | |
194c011f | 459 | memset(&di->__pad4, 0, sizeof(di->__pad4)); |
194c011f | 460 | memset(&di->di_reserved, 0, sizeof(di->di_reserved)); |
79ba7480 | 461 | gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode)); |
160b4026 | 462 | |
c9aecf73 | 463 | switch(ip->i_inode.i_mode & S_IFMT) { |
160b4026 | 464 | case S_IFDIR: |
e2d0a13b | 465 | gfs2_init_dir(dibh, dip); |
160b4026 SW |
466 | break; |
467 | case S_IFLNK: | |
c9aecf73 | 468 | memcpy(dibh->b_data + sizeof(struct gfs2_dinode), symname, ip->i_inode.i_size); |
160b4026 | 469 | break; |
e2d0a13b SW |
470 | } |
471 | ||
194c011f | 472 | set_buffer_uptodate(dibh); |
79ba7480 | 473 | brelse(dibh); |
194c011f SW |
474 | } |
475 | ||
534cf9ca SW |
476 | /** |
477 | * gfs2_trans_da_blocks - Calculate number of blocks to link inode | |
478 | * @dip: The directory we are linking into | |
479 | * @da: The dir add information | |
480 | * @nr_inodes: The number of inodes involved | |
481 | * | |
482 | * This calculate the number of blocks we need to reserve in a | |
483 | * transaction to link @nr_inodes into a directory. In most cases | |
484 | * @nr_inodes will be 2 (the directory plus the inode being linked in) | |
485 | * but in case of rename, 4 may be required. | |
486 | * | |
487 | * Returns: Number of blocks | |
488 | */ | |
489 | ||
490 | static unsigned gfs2_trans_da_blks(const struct gfs2_inode *dip, | |
491 | const struct gfs2_diradd *da, | |
492 | unsigned nr_inodes) | |
493 | { | |
494 | return da->nr_blocks + gfs2_rg_blocks(dip, da->nr_blocks) + | |
495 | (nr_inodes * RES_DINODE) + RES_QUOTA + RES_STATFS; | |
496 | } | |
497 | ||
194c011f | 498 | static int link_dinode(struct gfs2_inode *dip, const struct qstr *name, |
3c1c0ae1 | 499 | struct gfs2_inode *ip, struct gfs2_diradd *da) |
194c011f SW |
500 | { |
501 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); | |
3c1c0ae1 | 502 | struct gfs2_alloc_parms ap = { .target = da->nr_blocks, }; |
194c011f SW |
503 | int error; |
504 | ||
3c1c0ae1 | 505 | if (da->nr_blocks) { |
b8fbf471 | 506 | error = gfs2_quota_lock_check(dip, &ap); |
194c011f SW |
507 | if (error) |
508 | goto fail_quota_locks; | |
509 | ||
7b9cff46 | 510 | error = gfs2_inplace_reserve(dip, &ap); |
194c011f SW |
511 | if (error) |
512 | goto fail_quota_locks; | |
513 | ||
534cf9ca | 514 | error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, da, 2), 0); |
194c011f SW |
515 | if (error) |
516 | goto fail_ipreserv; | |
517 | } else { | |
518 | error = gfs2_trans_begin(sdp, RES_LEAF + 2 * RES_DINODE, 0); | |
519 | if (error) | |
520 | goto fail_quota_locks; | |
521 | } | |
522 | ||
2b47dad8 | 523 | error = gfs2_dir_add(&dip->i_inode, name, ip, da); |
194c011f | 524 | |
194c011f | 525 | gfs2_trans_end(sdp); |
194c011f | 526 | fail_ipreserv: |
fd4b4e04 | 527 | gfs2_inplace_release(dip); |
194c011f SW |
528 | fail_quota_locks: |
529 | gfs2_quota_unlock(dip); | |
194c011f SW |
530 | return error; |
531 | } | |
532 | ||
46cc1e5f | 533 | static int gfs2_initxattrs(struct inode *inode, const struct xattr *xattr_array, |
9d8f13ba | 534 | void *fs_info) |
194c011f | 535 | { |
9d8f13ba MZ |
536 | const struct xattr *xattr; |
537 | int err = 0; | |
538 | ||
539 | for (xattr = xattr_array; xattr->name != NULL; xattr++) { | |
540 | err = __gfs2_xattr_set(inode, xattr->name, xattr->value, | |
541 | xattr->value_len, 0, | |
542 | GFS2_EATYPE_SECURITY); | |
543 | if (err < 0) | |
544 | break; | |
194c011f | 545 | } |
194c011f SW |
546 | return err; |
547 | } | |
b3b94faa | 548 | |
194c011f | 549 | /** |
f2741d98 SW |
550 | * gfs2_create_inode - Create a new inode |
551 | * @dir: The parent directory | |
552 | * @dentry: The new dentry | |
6d4ade98 | 553 | * @file: If non-NULL, the file which is being opened |
f2741d98 SW |
554 | * @mode: The permissions on the new inode |
555 | * @dev: For device nodes, this is the device number | |
556 | * @symname: For symlinks, this is the link destination | |
557 | * @size: The initial size of the inode (ignored for directories) | |
194c011f | 558 | * |
f2741d98 | 559 | * Returns: 0 on success, or error code |
194c011f SW |
560 | */ |
561 | ||
f2741d98 | 562 | static int gfs2_create_inode(struct inode *dir, struct dentry *dentry, |
6d4ade98 | 563 | struct file *file, |
175a4eb7 | 564 | umode_t mode, dev_t dev, const char *symname, |
6d4ade98 | 565 | unsigned int size, int excl, int *opened) |
194c011f | 566 | { |
f2741d98 | 567 | const struct qstr *name = &dentry->d_name; |
e01580bf | 568 | struct posix_acl *default_acl, *acl; |
f2741d98 | 569 | struct gfs2_holder ghs[2]; |
194c011f | 570 | struct inode *inode = NULL; |
8e2e0047 | 571 | struct gfs2_inode *dip = GFS2_I(dir), *ip; |
194c011f | 572 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); |
a4923865 | 573 | struct gfs2_glock *io_gl = NULL; |
783013c0 | 574 | int error, free_vfs_inode = 1; |
9dbe9610 | 575 | u32 aflags = 0; |
b2c8b3ea | 576 | unsigned blocks = 1; |
19aeb5a6 | 577 | struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, }; |
194c011f SW |
578 | |
579 | if (!name->len || name->len > GFS2_FNAMESIZE) | |
f2741d98 | 580 | return -ENAMETOOLONG; |
194c011f | 581 | |
b54e9a0b | 582 | error = gfs2_rsqa_alloc(dip); |
0a305e49 BP |
583 | if (error) |
584 | return error; | |
585 | ||
fd4b4e04 SW |
586 | error = gfs2_rindex_update(sdp); |
587 | if (error) | |
588 | return error; | |
589 | ||
f2741d98 | 590 | error = gfs2_glock_nq_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); |
194c011f SW |
591 | if (error) |
592 | goto fail; | |
593 | ||
594 | error = create_ok(dip, name, mode); | |
5a00f3cc SW |
595 | if (error) |
596 | goto fail_gunlock; | |
597 | ||
598 | inode = gfs2_dir_search(dir, &dentry->d_name, !S_ISREG(mode) || excl); | |
599 | error = PTR_ERR(inode); | |
600 | if (!IS_ERR(inode)) { | |
571a4b57 AV |
601 | if (S_ISDIR(inode->i_mode)) { |
602 | iput(inode); | |
603 | inode = ERR_PTR(-EISDIR); | |
604 | goto fail_gunlock; | |
605 | } | |
44bb31ba | 606 | d_instantiate(dentry, inode); |
6d4ade98 | 607 | error = 0; |
0d0d1107 | 608 | if (file) { |
44bb31ba | 609 | if (S_ISREG(inode->i_mode)) |
5ca1db41 | 610 | error = finish_open(file, dentry, gfs2_open_common, opened); |
44bb31ba AV |
611 | else |
612 | error = finish_no_open(file, NULL); | |
6d4ade98 | 613 | } |
9a63edd1 | 614 | gfs2_glock_dq_uninit(ghs); |
6d4ade98 | 615 | return error; |
5a00f3cc | 616 | } else if (error != -ENOENT) { |
194c011f | 617 | goto fail_gunlock; |
5a00f3cc | 618 | } |
194c011f | 619 | |
3c1c0ae1 | 620 | error = gfs2_diradd_alloc_required(dir, name, &da); |
fd4b4e04 SW |
621 | if (error < 0) |
622 | goto fail_gunlock; | |
623 | ||
c9aecf73 | 624 | inode = new_inode(sdp->sd_vfs); |
fd4b4e04 SW |
625 | error = -ENOMEM; |
626 | if (!inode) | |
627 | goto fail_gunlock; | |
628 | ||
e01580bf CH |
629 | error = posix_acl_create(dir, &mode, &default_acl, &acl); |
630 | if (error) | |
783013c0 | 631 | goto fail_gunlock; |
e01580bf | 632 | |
c9aecf73 | 633 | ip = GFS2_I(inode); |
b54e9a0b | 634 | error = gfs2_rsqa_alloc(ip); |
194c011f | 635 | if (error) |
e01580bf | 636 | goto fail_free_acls; |
c9aecf73 | 637 | |
c9aecf73 | 638 | inode->i_mode = mode; |
79ba7480 | 639 | set_nlink(inode, S_ISDIR(mode) ? 2 : 1); |
c9aecf73 SW |
640 | inode->i_rdev = dev; |
641 | inode->i_size = size; | |
fd4b4e04 | 642 | inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; |
28fb3027 | 643 | gfs2_set_inode_blocks(inode, 1); |
c9aecf73 | 644 | munge_mode_uid_gid(dip, inode); |
00a158be | 645 | check_and_update_goal(dip); |
c9aecf73 | 646 | ip->i_goal = dip->i_goal; |
28fb3027 SW |
647 | ip->i_diskflags = 0; |
648 | ip->i_eattr = 0; | |
649 | ip->i_height = 0; | |
650 | ip->i_depth = 0; | |
651 | ip->i_entries = 0; | |
652 | ||
653 | switch(mode & S_IFMT) { | |
654 | case S_IFREG: | |
655 | if ((dip->i_diskflags & GFS2_DIF_INHERIT_JDATA) || | |
656 | gfs2_tune_get(sdp, gt_new_files_jdata)) | |
657 | ip->i_diskflags |= GFS2_DIF_JDATA; | |
658 | gfs2_set_aops(inode); | |
659 | break; | |
660 | case S_IFDIR: | |
661 | ip->i_diskflags |= (dip->i_diskflags & GFS2_DIF_INHERIT_JDATA); | |
662 | ip->i_diskflags |= GFS2_DIF_JDATA; | |
663 | ip->i_entries = 2; | |
664 | break; | |
665 | } | |
acc546fd AD |
666 | |
667 | /* Force SYSTEM flag on all files and subdirs of a SYSTEM directory */ | |
668 | if (dip->i_diskflags & GFS2_DIF_SYSTEM) | |
669 | ip->i_diskflags |= GFS2_DIF_SYSTEM; | |
670 | ||
28fb3027 | 671 | gfs2_set_inode_flags(inode); |
194c011f | 672 | |
2b0143b5 | 673 | if ((GFS2_I(d_inode(sdp->sd_root_dir)) == dip) || |
9dbe9610 SW |
674 | (dip->i_diskflags & GFS2_DIF_TOPDIR)) |
675 | aflags |= GFS2_AF_ORLOV; | |
676 | ||
b2c8b3ea SW |
677 | if (default_acl || acl) |
678 | blocks++; | |
679 | ||
680 | error = alloc_dinode(ip, aflags, &blocks); | |
194c011f | 681 | if (error) |
c9aecf73 | 682 | goto fail_free_inode; |
194c011f | 683 | |
b2c8b3ea SW |
684 | gfs2_set_inode_blocks(inode, blocks); |
685 | ||
c9aecf73 | 686 | error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl); |
194c011f | 687 | if (error) |
c9aecf73 | 688 | goto fail_free_inode; |
194c011f | 689 | |
1e2d9d44 | 690 | ip->i_gl->gl_object = ip; |
c9aecf73 SW |
691 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1); |
692 | if (error) | |
693 | goto fail_free_inode; | |
694 | ||
b2c8b3ea | 695 | error = gfs2_trans_begin(sdp, blocks, 0); |
c9aecf73 | 696 | if (error) |
194c011f SW |
697 | goto fail_gunlock2; |
698 | ||
b2c8b3ea SW |
699 | if (blocks > 1) { |
700 | ip->i_eattr = ip->i_no_addr + 1; | |
701 | gfs2_init_xattr(ip); | |
702 | } | |
79ba7480 | 703 | init_dinode(dip, ip, symname); |
fd4b4e04 SW |
704 | gfs2_trans_end(sdp); |
705 | ||
c9aecf73 | 706 | error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_iopen_glops, CREATE, &io_gl); |
194c011f SW |
707 | if (error) |
708 | goto fail_gunlock2; | |
709 | ||
a4923865 BP |
710 | BUG_ON(test_and_set_bit(GLF_INODE_CREATING, &io_gl->gl_flags)); |
711 | ||
c9aecf73 | 712 | error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh); |
ff7f4cb4 SW |
713 | if (error) |
714 | goto fail_gunlock2; | |
0a305e49 | 715 | |
c9aecf73 SW |
716 | ip->i_iopen_gh.gh_gl->gl_object = ip; |
717 | gfs2_glock_put(io_gl); | |
718 | gfs2_set_iop(inode); | |
719 | insert_inode_hash(inode); | |
720 | ||
783013c0 BP |
721 | free_vfs_inode = 0; /* After this point, the inode is no longer |
722 | considered free. Any failures need to undo | |
723 | the gfs2 structures. */ | |
e01580bf | 724 | if (default_acl) { |
1a39ba99 | 725 | error = __gfs2_set_acl(inode, default_acl, ACL_TYPE_DEFAULT); |
e01580bf CH |
726 | posix_acl_release(default_acl); |
727 | } | |
728 | if (acl) { | |
729 | if (!error) | |
1a39ba99 | 730 | error = __gfs2_set_acl(inode, acl, ACL_TYPE_ACCESS); |
e01580bf CH |
731 | posix_acl_release(acl); |
732 | } | |
733 | ||
194c011f | 734 | if (error) |
c9aecf73 | 735 | goto fail_gunlock3; |
194c011f | 736 | |
f45dc26d BP |
737 | error = security_inode_init_security(&ip->i_inode, &dip->i_inode, name, |
738 | &gfs2_initxattrs, NULL); | |
194c011f | 739 | if (error) |
c9aecf73 | 740 | goto fail_gunlock3; |
194c011f | 741 | |
3c1c0ae1 | 742 | error = link_dinode(dip, name, ip, &da); |
194c011f | 743 | if (error) |
c9aecf73 | 744 | goto fail_gunlock3; |
194c011f | 745 | |
79ba7480 | 746 | mark_inode_dirty(inode); |
6d4ade98 | 747 | d_instantiate(dentry, inode); |
c5bf8fef MS |
748 | if (file) { |
749 | *opened |= FILE_CREATED; | |
6d4ade98 | 750 | error = finish_open(file, dentry, gfs2_open_common, opened); |
c5bf8fef | 751 | } |
28fb3027 SW |
752 | gfs2_glock_dq_uninit(ghs); |
753 | gfs2_glock_dq_uninit(ghs + 1); | |
a4923865 | 754 | clear_bit(GLF_INODE_CREATING, &io_gl->gl_flags); |
6d4ade98 | 755 | return error; |
194c011f | 756 | |
c9aecf73 | 757 | fail_gunlock3: |
783013c0 BP |
758 | gfs2_glock_dq_uninit(&ip->i_iopen_gh); |
759 | gfs2_glock_put(io_gl); | |
194c011f | 760 | fail_gunlock2: |
a4923865 BP |
761 | if (io_gl) |
762 | clear_bit(GLF_INODE_CREATING, &io_gl->gl_flags); | |
194c011f | 763 | gfs2_glock_dq_uninit(ghs + 1); |
c9aecf73 SW |
764 | fail_free_inode: |
765 | if (ip->i_gl) | |
766 | gfs2_glock_put(ip->i_gl); | |
b54e9a0b | 767 | gfs2_rsqa_delete(ip, NULL); |
e01580bf CH |
768 | fail_free_acls: |
769 | if (default_acl) | |
770 | posix_acl_release(default_acl); | |
771 | if (acl) | |
772 | posix_acl_release(acl); | |
194c011f | 773 | fail_gunlock: |
2b47dad8 | 774 | gfs2_dir_no_add(&da); |
f2741d98 | 775 | gfs2_glock_dq_uninit(ghs); |
40ac218f | 776 | if (inode && !IS_ERR(inode)) { |
79ba7480 | 777 | clear_nlink(inode); |
05978803 AD |
778 | if (!free_vfs_inode) |
779 | mark_inode_dirty(inode); | |
780 | set_bit(free_vfs_inode ? GIF_FREE_VFS_INODE : GIF_ALLOC_FAILED, | |
781 | &GFS2_I(inode)->i_flags); | |
40ac218f SW |
782 | iput(inode); |
783 | } | |
194c011f | 784 | fail: |
f2741d98 | 785 | return error; |
194c011f | 786 | } |
f2741d98 | 787 | |
b3b94faa DT |
788 | /** |
789 | * gfs2_create - Create a file | |
790 | * @dir: The directory in which to create the file | |
791 | * @dentry: The dentry of the new file | |
792 | * @mode: The mode of the new file | |
793 | * | |
794 | * Returns: errno | |
795 | */ | |
796 | ||
797 | static int gfs2_create(struct inode *dir, struct dentry *dentry, | |
ebfc3b49 | 798 | umode_t mode, bool excl) |
b3b94faa | 799 | { |
6d4ade98 | 800 | return gfs2_create_inode(dir, dentry, NULL, S_IFREG | mode, 0, NULL, 0, excl, NULL); |
b3b94faa DT |
801 | } |
802 | ||
803 | /** | |
6d4ade98 | 804 | * __gfs2_lookup - Look up a filename in a directory and return its inode |
b3b94faa DT |
805 | * @dir: The directory inode |
806 | * @dentry: The dentry of the new inode | |
6d4ade98 SW |
807 | * @file: File to be opened |
808 | * @opened: atomic_open flags | |
b3b94faa | 809 | * |
b3b94faa DT |
810 | * |
811 | * Returns: errno | |
812 | */ | |
813 | ||
6d4ade98 SW |
814 | static struct dentry *__gfs2_lookup(struct inode *dir, struct dentry *dentry, |
815 | struct file *file, int *opened) | |
b3b94faa | 816 | { |
6d4ade98 SW |
817 | struct inode *inode; |
818 | struct dentry *d; | |
819 | struct gfs2_holder gh; | |
820 | struct gfs2_glock *gl; | |
821 | int error; | |
822 | ||
823 | inode = gfs2_lookupi(dir, &dentry->d_name, 0); | |
7b7a9115 BC |
824 | if (inode == NULL) { |
825 | d_add(dentry, NULL); | |
6d4ade98 | 826 | return NULL; |
7b7a9115 | 827 | } |
6d4ade98 SW |
828 | if (IS_ERR(inode)) |
829 | return ERR_CAST(inode); | |
830 | ||
831 | gl = GFS2_I(inode)->i_gl; | |
832 | error = gfs2_glock_nq_init(gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); | |
833 | if (error) { | |
834 | iput(inode); | |
835 | return ERR_PTR(error); | |
9656b2c1 | 836 | } |
6d4ade98 SW |
837 | |
838 | d = d_splice_alias(inode, dentry); | |
d57b9c9a | 839 | if (IS_ERR(d)) { |
d57b9c9a BF |
840 | gfs2_glock_dq_uninit(&gh); |
841 | return d; | |
842 | } | |
6d4ade98 SW |
843 | if (file && S_ISREG(inode->i_mode)) |
844 | error = finish_open(file, dentry, gfs2_open_common, opened); | |
845 | ||
846 | gfs2_glock_dq_uninit(&gh); | |
5ca1db41 MS |
847 | if (error) { |
848 | dput(d); | |
6d4ade98 | 849 | return ERR_PTR(error); |
5ca1db41 | 850 | } |
6d4ade98 SW |
851 | return d; |
852 | } | |
853 | ||
854 | static struct dentry *gfs2_lookup(struct inode *dir, struct dentry *dentry, | |
855 | unsigned flags) | |
856 | { | |
857 | return __gfs2_lookup(dir, dentry, NULL, NULL); | |
b3b94faa DT |
858 | } |
859 | ||
860 | /** | |
861 | * gfs2_link - Link to a file | |
862 | * @old_dentry: The inode to link | |
863 | * @dir: Add link to this directory | |
864 | * @dentry: The name of the link | |
865 | * | |
866 | * Link the inode in "old_dentry" into the directory "dir" with the | |
867 | * name in "dentry". | |
868 | * | |
869 | * Returns: errno | |
870 | */ | |
871 | ||
872 | static int gfs2_link(struct dentry *old_dentry, struct inode *dir, | |
873 | struct dentry *dentry) | |
874 | { | |
feaa7bba SW |
875 | struct gfs2_inode *dip = GFS2_I(dir); |
876 | struct gfs2_sbd *sdp = GFS2_SB(dir); | |
2b0143b5 | 877 | struct inode *inode = d_inode(old_dentry); |
feaa7bba | 878 | struct gfs2_inode *ip = GFS2_I(inode); |
b3b94faa | 879 | struct gfs2_holder ghs[2]; |
2baee03f | 880 | struct buffer_head *dibh; |
19aeb5a6 | 881 | struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, }; |
b3b94faa DT |
882 | int error; |
883 | ||
b60623c2 | 884 | if (S_ISDIR(inode->i_mode)) |
b3b94faa DT |
885 | return -EPERM; |
886 | ||
b54e9a0b | 887 | error = gfs2_rsqa_alloc(dip); |
0a305e49 BP |
888 | if (error) |
889 | return error; | |
890 | ||
b3b94faa DT |
891 | gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); |
892 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); | |
893 | ||
72dbf479 BP |
894 | error = gfs2_glock_nq(ghs); /* parent */ |
895 | if (error) | |
896 | goto out_parent; | |
897 | ||
898 | error = gfs2_glock_nq(ghs + 1); /* child */ | |
b3b94faa | 899 | if (error) |
72dbf479 | 900 | goto out_child; |
b3b94faa | 901 | |
d192a8e5 SW |
902 | error = -ENOENT; |
903 | if (inode->i_nlink == 0) | |
904 | goto out_gunlock; | |
905 | ||
10556cb2 | 906 | error = gfs2_permission(dir, MAY_WRITE | MAY_EXEC); |
b3b94faa DT |
907 | if (error) |
908 | goto out_gunlock; | |
909 | ||
dbb7cae2 | 910 | error = gfs2_dir_check(dir, &dentry->d_name, NULL); |
b3b94faa DT |
911 | switch (error) { |
912 | case -ENOENT: | |
913 | break; | |
914 | case 0: | |
915 | error = -EEXIST; | |
916 | default: | |
917 | goto out_gunlock; | |
918 | } | |
919 | ||
920 | error = -EINVAL; | |
4f56110a | 921 | if (!dip->i_inode.i_nlink) |
b3b94faa DT |
922 | goto out_gunlock; |
923 | error = -EFBIG; | |
ad6203f2 | 924 | if (dip->i_entries == (u32)-1) |
b3b94faa DT |
925 | goto out_gunlock; |
926 | error = -EPERM; | |
927 | if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) | |
928 | goto out_gunlock; | |
929 | error = -EINVAL; | |
4f56110a | 930 | if (!ip->i_inode.i_nlink) |
b3b94faa DT |
931 | goto out_gunlock; |
932 | error = -EMLINK; | |
4f56110a | 933 | if (ip->i_inode.i_nlink == (u32)-1) |
b3b94faa DT |
934 | goto out_gunlock; |
935 | ||
3c1c0ae1 | 936 | error = gfs2_diradd_alloc_required(dir, &dentry->d_name, &da); |
c752666c | 937 | if (error < 0) |
b3b94faa DT |
938 | goto out_gunlock; |
939 | ||
3c1c0ae1 SW |
940 | if (da.nr_blocks) { |
941 | struct gfs2_alloc_parms ap = { .target = da.nr_blocks, }; | |
b8fbf471 | 942 | error = gfs2_quota_lock_check(dip, &ap); |
b3b94faa | 943 | if (error) |
5407e242 | 944 | goto out_gunlock; |
b3b94faa | 945 | |
7b9cff46 | 946 | error = gfs2_inplace_reserve(dip, &ap); |
b3b94faa DT |
947 | if (error) |
948 | goto out_gunlock_q; | |
949 | ||
534cf9ca | 950 | error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, &da, 2), 0); |
b3b94faa DT |
951 | if (error) |
952 | goto out_ipres; | |
953 | } else { | |
954 | error = gfs2_trans_begin(sdp, 2 * RES_DINODE + RES_LEAF, 0); | |
955 | if (error) | |
956 | goto out_ipres; | |
957 | } | |
958 | ||
2baee03f | 959 | error = gfs2_meta_inode_buffer(ip, &dibh); |
b3b94faa DT |
960 | if (error) |
961 | goto out_end_trans; | |
962 | ||
2b47dad8 | 963 | error = gfs2_dir_add(dir, &dentry->d_name, ip, &da); |
2baee03f SW |
964 | if (error) |
965 | goto out_brelse; | |
966 | ||
350a9b0a | 967 | gfs2_trans_add_meta(ip->i_gl, dibh); |
2baee03f SW |
968 | inc_nlink(&ip->i_inode); |
969 | ip->i_inode.i_ctime = CURRENT_TIME; | |
ab9bbda0 SW |
970 | ihold(inode); |
971 | d_instantiate(dentry, inode); | |
972 | mark_inode_dirty(inode); | |
b3b94faa | 973 | |
2baee03f SW |
974 | out_brelse: |
975 | brelse(dibh); | |
feaa7bba | 976 | out_end_trans: |
b3b94faa | 977 | gfs2_trans_end(sdp); |
feaa7bba | 978 | out_ipres: |
3c1c0ae1 | 979 | if (da.nr_blocks) |
b3b94faa | 980 | gfs2_inplace_release(dip); |
feaa7bba | 981 | out_gunlock_q: |
3c1c0ae1 | 982 | if (da.nr_blocks) |
b3b94faa | 983 | gfs2_quota_unlock(dip); |
feaa7bba | 984 | out_gunlock: |
2b47dad8 | 985 | gfs2_dir_no_add(&da); |
72dbf479 BP |
986 | gfs2_glock_dq(ghs + 1); |
987 | out_child: | |
988 | gfs2_glock_dq(ghs); | |
989 | out_parent: | |
b3b94faa DT |
990 | gfs2_holder_uninit(ghs); |
991 | gfs2_holder_uninit(ghs + 1); | |
b3b94faa DT |
992 | return error; |
993 | } | |
994 | ||
87ec2174 SW |
995 | /* |
996 | * gfs2_unlink_ok - check to see that a inode is still in a directory | |
997 | * @dip: the directory | |
998 | * @name: the name of the file | |
999 | * @ip: the inode | |
1000 | * | |
1001 | * Assumes that the lock on (at least) @dip is held. | |
1002 | * | |
1003 | * Returns: 0 if the parent/child relationship is correct, errno if it isn't | |
1004 | */ | |
1005 | ||
1006 | static int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name, | |
1007 | const struct gfs2_inode *ip) | |
1008 | { | |
1009 | int error; | |
1010 | ||
1011 | if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode)) | |
1012 | return -EPERM; | |
1013 | ||
1014 | if ((dip->i_inode.i_mode & S_ISVTX) && | |
6b24c0d2 EB |
1015 | !uid_eq(dip->i_inode.i_uid, current_fsuid()) && |
1016 | !uid_eq(ip->i_inode.i_uid, current_fsuid()) && !capable(CAP_FOWNER)) | |
87ec2174 SW |
1017 | return -EPERM; |
1018 | ||
1019 | if (IS_APPEND(&dip->i_inode)) | |
1020 | return -EPERM; | |
1021 | ||
10556cb2 | 1022 | error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC); |
87ec2174 SW |
1023 | if (error) |
1024 | return error; | |
1025 | ||
37975f15 | 1026 | return gfs2_dir_check(&dip->i_inode, name, ip); |
87ec2174 SW |
1027 | } |
1028 | ||
b3b94faa | 1029 | /** |
855d23ce SW |
1030 | * gfs2_unlink_inode - Removes an inode from its parent dir and unlinks it |
1031 | * @dip: The parent directory | |
1032 | * @name: The name of the entry in the parent directory | |
855d23ce SW |
1033 | * @inode: The inode to be removed |
1034 | * | |
1035 | * Called with all the locks and in a transaction. This will only be | |
1036 | * called for a directory after it has been checked to ensure it is empty. | |
1037 | * | |
1038 | * Returns: 0 on success, or an error | |
1039 | */ | |
1040 | ||
1041 | static int gfs2_unlink_inode(struct gfs2_inode *dip, | |
4327a9bf | 1042 | const struct dentry *dentry) |
855d23ce | 1043 | { |
2b0143b5 | 1044 | struct inode *inode = d_inode(dentry); |
855d23ce SW |
1045 | struct gfs2_inode *ip = GFS2_I(inode); |
1046 | int error; | |
1047 | ||
1048 | error = gfs2_dir_del(dip, dentry); | |
1049 | if (error) | |
1050 | return error; | |
1051 | ||
1052 | ip->i_entries = 0; | |
1053 | inode->i_ctime = CURRENT_TIME; | |
1054 | if (S_ISDIR(inode->i_mode)) | |
1055 | clear_nlink(inode); | |
1056 | else | |
1057 | drop_nlink(inode); | |
855d23ce SW |
1058 | mark_inode_dirty(inode); |
1059 | if (inode->i_nlink == 0) | |
1060 | gfs2_unlink_di(inode); | |
1061 | return 0; | |
1062 | } | |
1063 | ||
1064 | ||
1065 | /** | |
1066 | * gfs2_unlink - Unlink an inode (this does rmdir as well) | |
1067 | * @dir: The inode of the directory containing the inode to unlink | |
b3b94faa DT |
1068 | * @dentry: The file itself |
1069 | * | |
855d23ce SW |
1070 | * This routine uses the type of the inode as a flag to figure out |
1071 | * whether this is an unlink or an rmdir. | |
b3b94faa DT |
1072 | * |
1073 | * Returns: errno | |
1074 | */ | |
1075 | ||
1076 | static int gfs2_unlink(struct inode *dir, struct dentry *dentry) | |
1077 | { | |
feaa7bba SW |
1078 | struct gfs2_inode *dip = GFS2_I(dir); |
1079 | struct gfs2_sbd *sdp = GFS2_SB(dir); | |
2b0143b5 | 1080 | struct inode *inode = d_inode(dentry); |
855d23ce | 1081 | struct gfs2_inode *ip = GFS2_I(inode); |
ddee7608 RC |
1082 | struct gfs2_holder ghs[3]; |
1083 | struct gfs2_rgrpd *rgd; | |
5e2f7d61 BP |
1084 | int error; |
1085 | ||
1086 | error = gfs2_rindex_update(sdp); | |
1087 | if (error) | |
1088 | return error; | |
1089 | ||
1090 | error = -EROFS; | |
b3b94faa | 1091 | |
b3b94faa | 1092 | gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); |
ddee7608 | 1093 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); |
b3b94faa | 1094 | |
66fc061b | 1095 | rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr, 1); |
a365fbf3 | 1096 | if (!rgd) |
87654896 | 1097 | goto out_inodes; |
a365fbf3 | 1098 | |
ddee7608 RC |
1099 | gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2); |
1100 | ||
1101 | ||
8497a46e | 1102 | error = gfs2_glock_nq(ghs); /* parent */ |
b3b94faa | 1103 | if (error) |
8497a46e SW |
1104 | goto out_parent; |
1105 | ||
1106 | error = gfs2_glock_nq(ghs + 1); /* child */ | |
1107 | if (error) | |
1108 | goto out_child; | |
1109 | ||
d192a8e5 | 1110 | error = -ENOENT; |
855d23ce | 1111 | if (inode->i_nlink == 0) |
d192a8e5 SW |
1112 | goto out_rgrp; |
1113 | ||
855d23ce SW |
1114 | if (S_ISDIR(inode->i_mode)) { |
1115 | error = -ENOTEMPTY; | |
1116 | if (ip->i_entries > 2 || inode->i_nlink > 2) | |
1117 | goto out_rgrp; | |
1118 | } | |
1119 | ||
8497a46e SW |
1120 | error = gfs2_glock_nq(ghs + 2); /* rgrp */ |
1121 | if (error) | |
1122 | goto out_rgrp; | |
b3b94faa DT |
1123 | |
1124 | error = gfs2_unlink_ok(dip, &dentry->d_name, ip); | |
1125 | if (error) | |
72dbf479 | 1126 | goto out_gunlock; |
b3b94faa | 1127 | |
855d23ce | 1128 | error = gfs2_trans_begin(sdp, 2*RES_DINODE + 3*RES_LEAF + RES_RG_BIT, 0); |
855d23ce SW |
1129 | if (error) |
1130 | goto out_end_trans; | |
b3b94faa | 1131 | |
4327a9bf | 1132 | error = gfs2_unlink_inode(dip, dentry); |
b3b94faa | 1133 | |
feaa7bba SW |
1134 | out_end_trans: |
1135 | gfs2_trans_end(sdp); | |
72dbf479 | 1136 | out_gunlock: |
8497a46e SW |
1137 | gfs2_glock_dq(ghs + 2); |
1138 | out_rgrp: | |
8497a46e SW |
1139 | gfs2_glock_dq(ghs + 1); |
1140 | out_child: | |
8497a46e SW |
1141 | gfs2_glock_dq(ghs); |
1142 | out_parent: | |
87654896 SW |
1143 | gfs2_holder_uninit(ghs + 2); |
1144 | out_inodes: | |
1145 | gfs2_holder_uninit(ghs + 1); | |
8497a46e | 1146 | gfs2_holder_uninit(ghs); |
b3b94faa DT |
1147 | return error; |
1148 | } | |
1149 | ||
1150 | /** | |
1151 | * gfs2_symlink - Create a symlink | |
1152 | * @dir: The directory to create the symlink in | |
1153 | * @dentry: The dentry to put the symlink in | |
1154 | * @symname: The thing which the link points to | |
1155 | * | |
1156 | * Returns: errno | |
1157 | */ | |
1158 | ||
1159 | static int gfs2_symlink(struct inode *dir, struct dentry *dentry, | |
1160 | const char *symname) | |
1161 | { | |
feaa7bba | 1162 | struct gfs2_sbd *sdp = GFS2_SB(dir); |
160b4026 | 1163 | unsigned int size; |
b3b94faa | 1164 | |
b3b94faa DT |
1165 | size = strlen(symname); |
1166 | if (size > sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode) - 1) | |
1167 | return -ENAMETOOLONG; | |
1168 | ||
6d4ade98 | 1169 | return gfs2_create_inode(dir, dentry, NULL, S_IFLNK | S_IRWXUGO, 0, symname, size, 0, NULL); |
b3b94faa DT |
1170 | } |
1171 | ||
1172 | /** | |
1173 | * gfs2_mkdir - Make a directory | |
1174 | * @dir: The parent directory of the new one | |
1175 | * @dentry: The dentry of the new directory | |
1176 | * @mode: The mode of the new directory | |
1177 | * | |
1178 | * Returns: errno | |
1179 | */ | |
1180 | ||
18bb1db3 | 1181 | static int gfs2_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) |
b3b94faa | 1182 | { |
28fb3027 SW |
1183 | struct gfs2_sbd *sdp = GFS2_SB(dir); |
1184 | unsigned dsize = sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode); | |
6d4ade98 | 1185 | return gfs2_create_inode(dir, dentry, NULL, S_IFDIR | mode, 0, NULL, dsize, 0, NULL); |
b3b94faa DT |
1186 | } |
1187 | ||
b3b94faa DT |
1188 | /** |
1189 | * gfs2_mknod - Make a special file | |
1190 | * @dir: The directory in which the special file will reside | |
1191 | * @dentry: The dentry of the special file | |
1192 | * @mode: The mode of the special file | |
f2741d98 | 1193 | * @dev: The device specification of the special file |
b3b94faa DT |
1194 | * |
1195 | */ | |
1196 | ||
1a67aafb | 1197 | static int gfs2_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, |
b3b94faa DT |
1198 | dev_t dev) |
1199 | { | |
6d4ade98 SW |
1200 | return gfs2_create_inode(dir, dentry, NULL, mode, dev, NULL, 0, 0, NULL); |
1201 | } | |
1202 | ||
1203 | /** | |
1204 | * gfs2_atomic_open - Atomically open a file | |
1205 | * @dir: The directory | |
1206 | * @dentry: The proposed new entry | |
1207 | * @file: The proposed new struct file | |
1208 | * @flags: open flags | |
1209 | * @mode: File mode | |
1210 | * @opened: Flag to say whether the file has been opened or not | |
1211 | * | |
1212 | * Returns: error code or 0 for success | |
1213 | */ | |
1214 | ||
1215 | static int gfs2_atomic_open(struct inode *dir, struct dentry *dentry, | |
86fbca49 AO |
1216 | struct file *file, unsigned flags, |
1217 | umode_t mode, int *opened) | |
6d4ade98 SW |
1218 | { |
1219 | struct dentry *d; | |
1220 | bool excl = !!(flags & O_EXCL); | |
1221 | ||
4d93bc3e AV |
1222 | if (!d_unhashed(dentry)) |
1223 | goto skip_lookup; | |
1224 | ||
6d4ade98 SW |
1225 | d = __gfs2_lookup(dir, dentry, file, opened); |
1226 | if (IS_ERR(d)) | |
1227 | return PTR_ERR(d); | |
5ca1db41 MS |
1228 | if (d != NULL) |
1229 | dentry = d; | |
2b0143b5 | 1230 | if (d_really_is_positive(dentry)) { |
ec7d879c AV |
1231 | if (!(*opened & FILE_OPENED)) |
1232 | return finish_no_open(file, d); | |
5ca1db41 | 1233 | dput(d); |
6d4ade98 SW |
1234 | return 0; |
1235 | } | |
1236 | ||
5ca1db41 | 1237 | BUG_ON(d != NULL); |
4d93bc3e AV |
1238 | |
1239 | skip_lookup: | |
6d4ade98 SW |
1240 | if (!(flags & O_CREAT)) |
1241 | return -ENOENT; | |
1242 | ||
1243 | return gfs2_create_inode(dir, dentry, file, S_IFREG | mode, 0, NULL, 0, excl, opened); | |
b3b94faa DT |
1244 | } |
1245 | ||
0188d6c5 SW |
1246 | /* |
1247 | * gfs2_ok_to_move - check if it's ok to move a directory to another directory | |
1248 | * @this: move this | |
1249 | * @to: to here | |
1250 | * | |
1251 | * Follow @to back to the root and make sure we don't encounter @this | |
1252 | * Assumes we already hold the rename lock. | |
1253 | * | |
1254 | * Returns: errno | |
1255 | */ | |
1256 | ||
1257 | static int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to) | |
1258 | { | |
1259 | struct inode *dir = &to->i_inode; | |
1260 | struct super_block *sb = dir->i_sb; | |
1261 | struct inode *tmp; | |
0188d6c5 SW |
1262 | int error = 0; |
1263 | ||
0188d6c5 SW |
1264 | igrab(dir); |
1265 | ||
1266 | for (;;) { | |
1267 | if (dir == &this->i_inode) { | |
1268 | error = -EINVAL; | |
1269 | break; | |
1270 | } | |
2b0143b5 | 1271 | if (dir == d_inode(sb->s_root)) { |
0188d6c5 SW |
1272 | error = 0; |
1273 | break; | |
1274 | } | |
1275 | ||
8d123585 | 1276 | tmp = gfs2_lookupi(dir, &gfs2_qdotdot, 1); |
48f8f711 AD |
1277 | if (!tmp) { |
1278 | error = -ENOENT; | |
1279 | break; | |
1280 | } | |
0188d6c5 SW |
1281 | if (IS_ERR(tmp)) { |
1282 | error = PTR_ERR(tmp); | |
1283 | break; | |
1284 | } | |
1285 | ||
1286 | iput(dir); | |
1287 | dir = tmp; | |
1288 | } | |
1289 | ||
1290 | iput(dir); | |
1291 | ||
1292 | return error; | |
1293 | } | |
1294 | ||
a63b7bbc BM |
1295 | /** |
1296 | * update_moved_ino - Update an inode that's being moved | |
1297 | * @ip: The inode being moved | |
1298 | * @ndip: The parent directory of the new filename | |
1299 | * @dir_rename: True of ip is a directory | |
1300 | * | |
1301 | * Returns: errno | |
1302 | */ | |
1303 | ||
1304 | static int update_moved_ino(struct gfs2_inode *ip, struct gfs2_inode *ndip, | |
1305 | int dir_rename) | |
1306 | { | |
1307 | int error; | |
1308 | struct buffer_head *dibh; | |
1309 | ||
1310 | if (dir_rename) | |
1311 | return gfs2_dir_mvino(ip, &gfs2_qdotdot, ndip, DT_DIR); | |
1312 | ||
1313 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1314 | if (error) | |
1315 | return error; | |
1316 | ip->i_inode.i_ctime = CURRENT_TIME; | |
1317 | gfs2_trans_add_meta(ip->i_gl, dibh); | |
1318 | gfs2_dinode_out(ip, dibh->b_data); | |
1319 | brelse(dibh); | |
1320 | return 0; | |
1321 | } | |
1322 | ||
1323 | ||
b3b94faa DT |
1324 | /** |
1325 | * gfs2_rename - Rename a file | |
1326 | * @odir: Parent directory of old file name | |
1327 | * @odentry: The old dentry of the file | |
1328 | * @ndir: Parent directory of new file name | |
1329 | * @ndentry: The new dentry of the file | |
1330 | * | |
1331 | * Returns: errno | |
1332 | */ | |
1333 | ||
1334 | static int gfs2_rename(struct inode *odir, struct dentry *odentry, | |
1335 | struct inode *ndir, struct dentry *ndentry) | |
1336 | { | |
feaa7bba SW |
1337 | struct gfs2_inode *odip = GFS2_I(odir); |
1338 | struct gfs2_inode *ndip = GFS2_I(ndir); | |
2b0143b5 | 1339 | struct gfs2_inode *ip = GFS2_I(d_inode(odentry)); |
b3b94faa | 1340 | struct gfs2_inode *nip = NULL; |
feaa7bba | 1341 | struct gfs2_sbd *sdp = GFS2_SB(odir); |
8339ee54 | 1342 | struct gfs2_holder ghs[5], r_gh = { .gh_gl = NULL, }; |
ddee7608 | 1343 | struct gfs2_rgrpd *nrgd; |
b3b94faa DT |
1344 | unsigned int num_gh; |
1345 | int dir_rename = 0; | |
19aeb5a6 | 1346 | struct gfs2_diradd da = { .nr_blocks = 0, .save_loc = 0, }; |
b3b94faa DT |
1347 | unsigned int x; |
1348 | int error; | |
1349 | ||
2b0143b5 DH |
1350 | if (d_really_is_positive(ndentry)) { |
1351 | nip = GFS2_I(d_inode(ndentry)); | |
b3b94faa DT |
1352 | if (ip == nip) |
1353 | return 0; | |
1354 | } | |
1355 | ||
5e2f7d61 BP |
1356 | error = gfs2_rindex_update(sdp); |
1357 | if (error) | |
1358 | return error; | |
1359 | ||
b54e9a0b | 1360 | error = gfs2_rsqa_alloc(ndip); |
0a305e49 BP |
1361 | if (error) |
1362 | return error; | |
1363 | ||
0188d6c5 SW |
1364 | if (odip != ndip) { |
1365 | error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE, | |
1366 | 0, &r_gh); | |
b3b94faa DT |
1367 | if (error) |
1368 | goto out; | |
1369 | ||
0188d6c5 SW |
1370 | if (S_ISDIR(ip->i_inode.i_mode)) { |
1371 | dir_rename = 1; | |
a63b7bbc | 1372 | /* don't move a directory into its subdir */ |
0188d6c5 SW |
1373 | error = gfs2_ok_to_move(ip, ndip); |
1374 | if (error) | |
1375 | goto out_gunlock_r; | |
1376 | } | |
b3b94faa DT |
1377 | } |
1378 | ||
d9d1ca30 | 1379 | num_gh = 1; |
b3b94faa | 1380 | gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); |
d9d1ca30 SW |
1381 | if (odip != ndip) { |
1382 | gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); | |
1383 | num_gh++; | |
1384 | } | |
1385 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); | |
1386 | num_gh++; | |
b3b94faa | 1387 | |
d9d1ca30 SW |
1388 | if (nip) { |
1389 | gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); | |
1390 | num_gh++; | |
ddee7608 RC |
1391 | /* grab the resource lock for unlink flag twiddling |
1392 | * this is the case of the target file already existing | |
1393 | * so we unlink before doing the rename | |
1394 | */ | |
66fc061b | 1395 | nrgd = gfs2_blk2rgrpd(sdp, nip->i_no_addr, 1); |
ddee7608 RC |
1396 | if (nrgd) |
1397 | gfs2_holder_init(nrgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh++); | |
d9d1ca30 | 1398 | } |
b3b94faa | 1399 | |
72dbf479 BP |
1400 | for (x = 0; x < num_gh; x++) { |
1401 | error = gfs2_glock_nq(ghs + x); | |
1402 | if (error) | |
1403 | goto out_gunlock; | |
1404 | } | |
b3b94faa | 1405 | |
d192a8e5 SW |
1406 | error = -ENOENT; |
1407 | if (ip->i_inode.i_nlink == 0) | |
1408 | goto out_gunlock; | |
1409 | ||
b3b94faa DT |
1410 | /* Check out the old directory */ |
1411 | ||
1412 | error = gfs2_unlink_ok(odip, &odentry->d_name, ip); | |
1413 | if (error) | |
1414 | goto out_gunlock; | |
1415 | ||
1416 | /* Check out the new directory */ | |
1417 | ||
1418 | if (nip) { | |
1419 | error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip); | |
1420 | if (error) | |
1421 | goto out_gunlock; | |
1422 | ||
d192a8e5 SW |
1423 | if (nip->i_inode.i_nlink == 0) { |
1424 | error = -EAGAIN; | |
1425 | goto out_gunlock; | |
1426 | } | |
1427 | ||
b60623c2 | 1428 | if (S_ISDIR(nip->i_inode.i_mode)) { |
ad6203f2 | 1429 | if (nip->i_entries < 2) { |
94fb763b | 1430 | gfs2_consist_inode(nip); |
b3b94faa DT |
1431 | error = -EIO; |
1432 | goto out_gunlock; | |
1433 | } | |
ad6203f2 | 1434 | if (nip->i_entries > 2) { |
b3b94faa DT |
1435 | error = -ENOTEMPTY; |
1436 | goto out_gunlock; | |
1437 | } | |
1438 | } | |
1439 | } else { | |
10556cb2 | 1440 | error = gfs2_permission(ndir, MAY_WRITE | MAY_EXEC); |
b3b94faa DT |
1441 | if (error) |
1442 | goto out_gunlock; | |
1443 | ||
dbb7cae2 | 1444 | error = gfs2_dir_check(ndir, &ndentry->d_name, NULL); |
b3b94faa DT |
1445 | switch (error) { |
1446 | case -ENOENT: | |
1447 | error = 0; | |
1448 | break; | |
1449 | case 0: | |
1450 | error = -EEXIST; | |
1451 | default: | |
1452 | goto out_gunlock; | |
1453 | }; | |
1454 | ||
1455 | if (odip != ndip) { | |
4f56110a | 1456 | if (!ndip->i_inode.i_nlink) { |
d192a8e5 | 1457 | error = -ENOENT; |
b3b94faa DT |
1458 | goto out_gunlock; |
1459 | } | |
ad6203f2 | 1460 | if (ndip->i_entries == (u32)-1) { |
b3b94faa DT |
1461 | error = -EFBIG; |
1462 | goto out_gunlock; | |
1463 | } | |
b60623c2 | 1464 | if (S_ISDIR(ip->i_inode.i_mode) && |
4f56110a | 1465 | ndip->i_inode.i_nlink == (u32)-1) { |
b3b94faa DT |
1466 | error = -EMLINK; |
1467 | goto out_gunlock; | |
1468 | } | |
1469 | } | |
1470 | } | |
1471 | ||
1472 | /* Check out the dir to be renamed */ | |
1473 | ||
1474 | if (dir_rename) { | |
2b0143b5 | 1475 | error = gfs2_permission(d_inode(odentry), MAY_WRITE); |
b3b94faa DT |
1476 | if (error) |
1477 | goto out_gunlock; | |
1478 | } | |
1479 | ||
3c1c0ae1 SW |
1480 | if (nip == NULL) { |
1481 | error = gfs2_diradd_alloc_required(ndir, &ndentry->d_name, &da); | |
1482 | if (error) | |
1483 | goto out_gunlock; | |
1484 | } | |
b3b94faa | 1485 | |
3c1c0ae1 SW |
1486 | if (da.nr_blocks) { |
1487 | struct gfs2_alloc_parms ap = { .target = da.nr_blocks, }; | |
b8fbf471 | 1488 | error = gfs2_quota_lock_check(ndip, &ap); |
b3b94faa | 1489 | if (error) |
5407e242 | 1490 | goto out_gunlock; |
b3b94faa | 1491 | |
7b9cff46 | 1492 | error = gfs2_inplace_reserve(ndip, &ap); |
b3b94faa DT |
1493 | if (error) |
1494 | goto out_gunlock_q; | |
1495 | ||
534cf9ca SW |
1496 | error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(ndip, &da, 4) + |
1497 | 4 * RES_LEAF + 4, 0); | |
b3b94faa DT |
1498 | if (error) |
1499 | goto out_ipreserv; | |
1500 | } else { | |
1501 | error = gfs2_trans_begin(sdp, 4 * RES_DINODE + | |
87d21e07 | 1502 | 5 * RES_LEAF + 4, 0); |
b3b94faa DT |
1503 | if (error) |
1504 | goto out_gunlock; | |
1505 | } | |
1506 | ||
1507 | /* Remove the target file, if it exists */ | |
1508 | ||
4327a9bf BP |
1509 | if (nip) |
1510 | error = gfs2_unlink_inode(ndip, ndentry); | |
b3b94faa | 1511 | |
a63b7bbc BM |
1512 | error = update_moved_ino(ip, ndip, dir_rename); |
1513 | if (error) | |
1514 | goto out_end_trans; | |
b3b94faa | 1515 | |
855d23ce | 1516 | error = gfs2_dir_del(odip, odentry); |
b3b94faa DT |
1517 | if (error) |
1518 | goto out_end_trans; | |
1519 | ||
2b47dad8 | 1520 | error = gfs2_dir_add(ndir, &ndentry->d_name, ip, &da); |
b3b94faa DT |
1521 | if (error) |
1522 | goto out_end_trans; | |
1523 | ||
feaa7bba | 1524 | out_end_trans: |
b3b94faa | 1525 | gfs2_trans_end(sdp); |
feaa7bba | 1526 | out_ipreserv: |
3c1c0ae1 | 1527 | if (da.nr_blocks) |
b3b94faa | 1528 | gfs2_inplace_release(ndip); |
feaa7bba | 1529 | out_gunlock_q: |
3c1c0ae1 | 1530 | if (da.nr_blocks) |
b3b94faa | 1531 | gfs2_quota_unlock(ndip); |
feaa7bba | 1532 | out_gunlock: |
2b47dad8 | 1533 | gfs2_dir_no_add(&da); |
72dbf479 BP |
1534 | while (x--) { |
1535 | gfs2_glock_dq(ghs + x); | |
b3b94faa | 1536 | gfs2_holder_uninit(ghs + x); |
72dbf479 | 1537 | } |
feaa7bba | 1538 | out_gunlock_r: |
0188d6c5 | 1539 | if (r_gh.gh_gl) |
b3b94faa | 1540 | gfs2_glock_dq_uninit(&r_gh); |
feaa7bba | 1541 | out: |
b3b94faa DT |
1542 | return error; |
1543 | } | |
1544 | ||
a63b7bbc BM |
1545 | /** |
1546 | * gfs2_exchange - exchange two files | |
1547 | * @odir: Parent directory of old file name | |
1548 | * @odentry: The old dentry of the file | |
1549 | * @ndir: Parent directory of new file name | |
1550 | * @ndentry: The new dentry of the file | |
1551 | * @flags: The rename flags | |
1552 | * | |
1553 | * Returns: errno | |
1554 | */ | |
1555 | ||
1556 | static int gfs2_exchange(struct inode *odir, struct dentry *odentry, | |
1557 | struct inode *ndir, struct dentry *ndentry, | |
1558 | unsigned int flags) | |
1559 | { | |
1560 | struct gfs2_inode *odip = GFS2_I(odir); | |
1561 | struct gfs2_inode *ndip = GFS2_I(ndir); | |
1562 | struct gfs2_inode *oip = GFS2_I(odentry->d_inode); | |
1563 | struct gfs2_inode *nip = GFS2_I(ndentry->d_inode); | |
1564 | struct gfs2_sbd *sdp = GFS2_SB(odir); | |
1565 | struct gfs2_holder ghs[5], r_gh = { .gh_gl = NULL, }; | |
1566 | unsigned int num_gh; | |
1567 | unsigned int x; | |
1568 | umode_t old_mode = oip->i_inode.i_mode; | |
1569 | umode_t new_mode = nip->i_inode.i_mode; | |
1570 | int error; | |
1571 | ||
1572 | error = gfs2_rindex_update(sdp); | |
1573 | if (error) | |
1574 | return error; | |
1575 | ||
1576 | if (odip != ndip) { | |
1577 | error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE, | |
1578 | 0, &r_gh); | |
1579 | if (error) | |
1580 | goto out; | |
1581 | ||
1582 | if (S_ISDIR(old_mode)) { | |
1583 | /* don't move a directory into its subdir */ | |
1584 | error = gfs2_ok_to_move(oip, ndip); | |
1585 | if (error) | |
1586 | goto out_gunlock_r; | |
1587 | } | |
1588 | ||
1589 | if (S_ISDIR(new_mode)) { | |
1590 | /* don't move a directory into its subdir */ | |
1591 | error = gfs2_ok_to_move(nip, odip); | |
1592 | if (error) | |
1593 | goto out_gunlock_r; | |
1594 | } | |
1595 | } | |
1596 | ||
1597 | num_gh = 1; | |
1598 | gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); | |
1599 | if (odip != ndip) { | |
1600 | gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); | |
1601 | num_gh++; | |
1602 | } | |
1603 | gfs2_holder_init(oip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); | |
1604 | num_gh++; | |
1605 | ||
1606 | gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); | |
1607 | num_gh++; | |
1608 | ||
1609 | for (x = 0; x < num_gh; x++) { | |
1610 | error = gfs2_glock_nq(ghs + x); | |
1611 | if (error) | |
1612 | goto out_gunlock; | |
1613 | } | |
1614 | ||
1615 | error = -ENOENT; | |
1616 | if (oip->i_inode.i_nlink == 0 || nip->i_inode.i_nlink == 0) | |
1617 | goto out_gunlock; | |
1618 | ||
1619 | error = gfs2_unlink_ok(odip, &odentry->d_name, oip); | |
1620 | if (error) | |
1621 | goto out_gunlock; | |
1622 | error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip); | |
1623 | if (error) | |
1624 | goto out_gunlock; | |
1625 | ||
1626 | if (S_ISDIR(old_mode)) { | |
1627 | error = gfs2_permission(odentry->d_inode, MAY_WRITE); | |
1628 | if (error) | |
1629 | goto out_gunlock; | |
1630 | } | |
1631 | if (S_ISDIR(new_mode)) { | |
1632 | error = gfs2_permission(ndentry->d_inode, MAY_WRITE); | |
1633 | if (error) | |
1634 | goto out_gunlock; | |
1635 | } | |
1636 | error = gfs2_trans_begin(sdp, 4 * RES_DINODE + 4 * RES_LEAF, 0); | |
1637 | if (error) | |
1638 | goto out_gunlock; | |
1639 | ||
1640 | error = update_moved_ino(oip, ndip, S_ISDIR(old_mode)); | |
1641 | if (error) | |
1642 | goto out_end_trans; | |
1643 | ||
1644 | error = update_moved_ino(nip, odip, S_ISDIR(new_mode)); | |
1645 | if (error) | |
1646 | goto out_end_trans; | |
1647 | ||
1648 | error = gfs2_dir_mvino(ndip, &ndentry->d_name, oip, | |
1649 | IF2DT(old_mode)); | |
1650 | if (error) | |
1651 | goto out_end_trans; | |
1652 | ||
1653 | error = gfs2_dir_mvino(odip, &odentry->d_name, nip, | |
1654 | IF2DT(new_mode)); | |
1655 | if (error) | |
1656 | goto out_end_trans; | |
1657 | ||
1658 | if (odip != ndip) { | |
1659 | if (S_ISDIR(new_mode) && !S_ISDIR(old_mode)) { | |
1660 | inc_nlink(&odip->i_inode); | |
1661 | drop_nlink(&ndip->i_inode); | |
1662 | } else if (S_ISDIR(old_mode) && !S_ISDIR(new_mode)) { | |
1663 | inc_nlink(&ndip->i_inode); | |
1664 | drop_nlink(&odip->i_inode); | |
1665 | } | |
1666 | } | |
1667 | mark_inode_dirty(&ndip->i_inode); | |
1668 | if (odip != ndip) | |
1669 | mark_inode_dirty(&odip->i_inode); | |
1670 | ||
1671 | out_end_trans: | |
1672 | gfs2_trans_end(sdp); | |
1673 | out_gunlock: | |
1674 | while (x--) { | |
1675 | gfs2_glock_dq(ghs + x); | |
1676 | gfs2_holder_uninit(ghs + x); | |
1677 | } | |
1678 | out_gunlock_r: | |
1679 | if (r_gh.gh_gl) | |
1680 | gfs2_glock_dq_uninit(&r_gh); | |
1681 | out: | |
1682 | return error; | |
1683 | } | |
1684 | ||
1685 | static int gfs2_rename2(struct inode *odir, struct dentry *odentry, | |
1686 | struct inode *ndir, struct dentry *ndentry, | |
1687 | unsigned int flags) | |
1688 | { | |
1689 | flags &= ~RENAME_NOREPLACE; | |
1690 | ||
1691 | if (flags & ~RENAME_EXCHANGE) | |
1692 | return -EINVAL; | |
1693 | ||
1694 | if (flags & RENAME_EXCHANGE) | |
1695 | return gfs2_exchange(odir, odentry, ndir, ndentry, flags); | |
1696 | ||
1697 | return gfs2_rename(odir, odentry, ndir, ndentry); | |
1698 | } | |
1699 | ||
536baf02 | 1700 | /** |
6b255391 | 1701 | * gfs2_get_link - Follow a symbolic link |
c177c2ac | 1702 | * @dentry: The dentry of the link |
6b255391 | 1703 | * @inode: The inode of the link |
fceef393 | 1704 | * @done: destructor for return value |
536baf02 | 1705 | * |
c177c2ac | 1706 | * This can handle symlinks of any size. |
536baf02 | 1707 | * |
c177c2ac | 1708 | * Returns: 0 on success or error code |
536baf02 SW |
1709 | */ |
1710 | ||
6b255391 | 1711 | static const char *gfs2_get_link(struct dentry *dentry, |
fceef393 AV |
1712 | struct inode *inode, |
1713 | struct delayed_call *done) | |
536baf02 | 1714 | { |
6b255391 | 1715 | struct gfs2_inode *ip = GFS2_I(inode); |
536baf02 SW |
1716 | struct gfs2_holder i_gh; |
1717 | struct buffer_head *dibh; | |
160b4026 | 1718 | unsigned int size; |
c177c2ac | 1719 | char *buf; |
536baf02 SW |
1720 | int error; |
1721 | ||
6b255391 AV |
1722 | if (!dentry) |
1723 | return ERR_PTR(-ECHILD); | |
1724 | ||
536baf02 SW |
1725 | gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh); |
1726 | error = gfs2_glock_nq(&i_gh); | |
1727 | if (error) { | |
1728 | gfs2_holder_uninit(&i_gh); | |
680baacb | 1729 | return ERR_PTR(error); |
536baf02 SW |
1730 | } |
1731 | ||
a2e0f799 SW |
1732 | size = (unsigned int)i_size_read(&ip->i_inode); |
1733 | if (size == 0) { | |
536baf02 | 1734 | gfs2_consist_inode(ip); |
c177c2ac | 1735 | buf = ERR_PTR(-EIO); |
536baf02 SW |
1736 | goto out; |
1737 | } | |
1738 | ||
1739 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
c177c2ac AV |
1740 | if (error) { |
1741 | buf = ERR_PTR(error); | |
536baf02 | 1742 | goto out; |
536baf02 SW |
1743 | } |
1744 | ||
160b4026 | 1745 | buf = kzalloc(size + 1, GFP_NOFS); |
c177c2ac AV |
1746 | if (!buf) |
1747 | buf = ERR_PTR(-ENOMEM); | |
1748 | else | |
160b4026 | 1749 | memcpy(buf, dibh->b_data + sizeof(struct gfs2_dinode), size); |
536baf02 SW |
1750 | brelse(dibh); |
1751 | out: | |
1752 | gfs2_glock_dq_uninit(&i_gh); | |
680baacb | 1753 | if (!IS_ERR(buf)) |
fceef393 | 1754 | set_delayed_call(done, kfree_link, buf); |
680baacb | 1755 | return buf; |
b3b94faa DT |
1756 | } |
1757 | ||
b3b94faa DT |
1758 | /** |
1759 | * gfs2_permission - | |
75d5cfbe SW |
1760 | * @inode: The inode |
1761 | * @mask: The mask to be tested | |
1762 | * @flags: Indicates whether this is an RCU path walk or not | |
b3b94faa | 1763 | * |
300c7d75 SW |
1764 | * This may be called from the VFS directly, or from within GFS2 with the |
1765 | * inode locked, so we look to see if the glock is already locked and only | |
1766 | * lock the glock if its not already been done. | |
1767 | * | |
b3b94faa DT |
1768 | * Returns: errno |
1769 | */ | |
1770 | ||
10556cb2 | 1771 | int gfs2_permission(struct inode *inode, int mask) |
b3b94faa | 1772 | { |
b74c79e9 | 1773 | struct gfs2_inode *ip; |
b3b94faa DT |
1774 | struct gfs2_holder i_gh; |
1775 | int error; | |
300c7d75 | 1776 | int unlock = 0; |
b3b94faa | 1777 | |
b74c79e9 NP |
1778 | |
1779 | ip = GFS2_I(inode); | |
7afd88d9 | 1780 | if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) { |
2e60d768 BM |
1781 | if (mask & MAY_NOT_BLOCK) |
1782 | return -ECHILD; | |
1783 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh); | |
1784 | if (error) | |
1785 | return error; | |
1786 | unlock = 1; | |
300c7d75 | 1787 | } |
b3b94faa | 1788 | |
f58ba889 MS |
1789 | if ((mask & MAY_WRITE) && IS_IMMUTABLE(inode)) |
1790 | error = -EACCES; | |
1791 | else | |
2830ba7f | 1792 | error = generic_permission(inode, mask); |
300c7d75 | 1793 | if (unlock) |
b3b94faa | 1794 | gfs2_glock_dq_uninit(&i_gh); |
b3b94faa DT |
1795 | |
1796 | return error; | |
1797 | } | |
1798 | ||
ab9bbda0 | 1799 | static int __gfs2_setattr_simple(struct inode *inode, struct iattr *attr) |
194c011f | 1800 | { |
194c011f SW |
1801 | setattr_copy(inode, attr); |
1802 | mark_inode_dirty(inode); | |
194c011f SW |
1803 | return 0; |
1804 | } | |
1805 | ||
1806 | /** | |
1807 | * gfs2_setattr_simple - | |
1808 | * @ip: | |
1809 | * @attr: | |
1810 | * | |
1811 | * Returns: errno | |
1812 | */ | |
1813 | ||
ab9bbda0 | 1814 | int gfs2_setattr_simple(struct inode *inode, struct iattr *attr) |
194c011f SW |
1815 | { |
1816 | int error; | |
1817 | ||
1818 | if (current->journal_info) | |
ab9bbda0 | 1819 | return __gfs2_setattr_simple(inode, attr); |
194c011f | 1820 | |
ab9bbda0 | 1821 | error = gfs2_trans_begin(GFS2_SB(inode), RES_DINODE, 0); |
194c011f SW |
1822 | if (error) |
1823 | return error; | |
1824 | ||
ab9bbda0 SW |
1825 | error = __gfs2_setattr_simple(inode, attr); |
1826 | gfs2_trans_end(GFS2_SB(inode)); | |
194c011f SW |
1827 | return error; |
1828 | } | |
1829 | ||
b3b94faa DT |
1830 | static int setattr_chown(struct inode *inode, struct iattr *attr) |
1831 | { | |
feaa7bba SW |
1832 | struct gfs2_inode *ip = GFS2_I(inode); |
1833 | struct gfs2_sbd *sdp = GFS2_SB(inode); | |
7c06b5d6 EB |
1834 | kuid_t ouid, nuid; |
1835 | kgid_t ogid, ngid; | |
b3b94faa | 1836 | int error; |
b8fbf471 | 1837 | struct gfs2_alloc_parms ap; |
b3b94faa | 1838 | |
2933f925 SW |
1839 | ouid = inode->i_uid; |
1840 | ogid = inode->i_gid; | |
b3b94faa DT |
1841 | nuid = attr->ia_uid; |
1842 | ngid = attr->ia_gid; | |
1843 | ||
6b24c0d2 | 1844 | if (!(attr->ia_valid & ATTR_UID) || uid_eq(ouid, nuid)) |
f4108a60 | 1845 | ouid = nuid = NO_UID_QUOTA_CHANGE; |
6b24c0d2 | 1846 | if (!(attr->ia_valid & ATTR_GID) || gid_eq(ogid, ngid)) |
f4108a60 | 1847 | ogid = ngid = NO_GID_QUOTA_CHANGE; |
b3b94faa | 1848 | |
b54e9a0b | 1849 | error = gfs2_rsqa_alloc(ip); |
62e96cf8 BP |
1850 | if (error) |
1851 | goto out; | |
1852 | ||
1853 | error = gfs2_rindex_update(sdp); | |
1854 | if (error) | |
1855 | goto out; | |
1856 | ||
1857 | error = gfs2_quota_lock(ip, nuid, ngid); | |
1858 | if (error) | |
1859 | goto out; | |
1860 | ||
b8fbf471 AD |
1861 | ap.target = gfs2_get_inode_blocks(&ip->i_inode); |
1862 | ||
6b24c0d2 EB |
1863 | if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) || |
1864 | !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) { | |
b8fbf471 | 1865 | error = gfs2_quota_check(ip, nuid, ngid, &ap); |
b3b94faa DT |
1866 | if (error) |
1867 | goto out_gunlock_q; | |
1868 | } | |
1869 | ||
1870 | error = gfs2_trans_begin(sdp, RES_DINODE + 2 * RES_QUOTA, 0); | |
1871 | if (error) | |
1872 | goto out_gunlock_q; | |
1873 | ||
ab9bbda0 | 1874 | error = gfs2_setattr_simple(inode, attr); |
b3b94faa DT |
1875 | if (error) |
1876 | goto out_end_trans; | |
1877 | ||
6b24c0d2 EB |
1878 | if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) || |
1879 | !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) { | |
39a72580 | 1880 | gfs2_quota_change(ip, -(s64)ap.target, ouid, ogid); |
b8fbf471 | 1881 | gfs2_quota_change(ip, ap.target, nuid, ngid); |
b3b94faa DT |
1882 | } |
1883 | ||
a91ea69f | 1884 | out_end_trans: |
b3b94faa | 1885 | gfs2_trans_end(sdp); |
a91ea69f | 1886 | out_gunlock_q: |
b3b94faa | 1887 | gfs2_quota_unlock(ip); |
62e96cf8 | 1888 | out: |
b3b94faa DT |
1889 | return error; |
1890 | } | |
1891 | ||
1892 | /** | |
1893 | * gfs2_setattr - Change attributes on an inode | |
1894 | * @dentry: The dentry which is changing | |
1895 | * @attr: The structure describing the change | |
1896 | * | |
1897 | * The VFS layer wants to change one or more of an inodes attributes. Write | |
1898 | * that change out to disk. | |
1899 | * | |
1900 | * Returns: errno | |
1901 | */ | |
1902 | ||
1903 | static int gfs2_setattr(struct dentry *dentry, struct iattr *attr) | |
1904 | { | |
2b0143b5 | 1905 | struct inode *inode = d_inode(dentry); |
feaa7bba | 1906 | struct gfs2_inode *ip = GFS2_I(inode); |
b3b94faa DT |
1907 | struct gfs2_holder i_gh; |
1908 | int error; | |
1909 | ||
b54e9a0b | 1910 | error = gfs2_rsqa_alloc(ip); |
0a305e49 BP |
1911 | if (error) |
1912 | return error; | |
1913 | ||
b3b94faa DT |
1914 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); |
1915 | if (error) | |
1916 | return error; | |
1917 | ||
1918 | error = -EPERM; | |
1919 | if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) | |
1920 | goto out; | |
1921 | ||
1922 | error = inode_change_ok(inode, attr); | |
1923 | if (error) | |
1924 | goto out; | |
1925 | ||
1926 | if (attr->ia_valid & ATTR_SIZE) | |
ff8f33c8 | 1927 | error = gfs2_setattr_size(inode, attr->ia_size); |
b3b94faa DT |
1928 | else if (attr->ia_valid & (ATTR_UID | ATTR_GID)) |
1929 | error = setattr_chown(inode, attr); | |
e01580bf | 1930 | else { |
ab9bbda0 | 1931 | error = gfs2_setattr_simple(inode, attr); |
e01580bf CH |
1932 | if (!error && attr->ia_valid & ATTR_MODE) |
1933 | error = posix_acl_chmod(inode, inode->i_mode); | |
1934 | } | |
b3b94faa | 1935 | |
a91ea69f | 1936 | out: |
b3b94faa DT |
1937 | if (!error) |
1938 | mark_inode_dirty(inode); | |
ab9bbda0 | 1939 | gfs2_glock_dq_uninit(&i_gh); |
b3b94faa DT |
1940 | return error; |
1941 | } | |
1942 | ||
1943 | /** | |
1944 | * gfs2_getattr - Read out an inode's attributes | |
26c1a574 | 1945 | * @mnt: The vfsmount the inode is being accessed from |
b3b94faa DT |
1946 | * @dentry: The dentry to stat |
1947 | * @stat: The inode's stats | |
1948 | * | |
dcf3dd85 SW |
1949 | * This may be called from the VFS directly, or from within GFS2 with the |
1950 | * inode locked, so we look to see if the glock is already locked and only | |
1951 | * lock the glock if its not already been done. Note that its the NFS | |
1952 | * readdirplus operation which causes this to be called (from filldir) | |
1953 | * with the glock already held. | |
1954 | * | |
b3b94faa DT |
1955 | * Returns: errno |
1956 | */ | |
1957 | ||
1958 | static int gfs2_getattr(struct vfsmount *mnt, struct dentry *dentry, | |
1959 | struct kstat *stat) | |
1960 | { | |
2b0143b5 | 1961 | struct inode *inode = d_inode(dentry); |
feaa7bba | 1962 | struct gfs2_inode *ip = GFS2_I(inode); |
b3b94faa DT |
1963 | struct gfs2_holder gh; |
1964 | int error; | |
dcf3dd85 | 1965 | int unlock = 0; |
b3b94faa | 1966 | |
7afd88d9 | 1967 | if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) { |
2e60d768 BM |
1968 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); |
1969 | if (error) | |
1970 | return error; | |
1971 | unlock = 1; | |
b3b94faa DT |
1972 | } |
1973 | ||
dcf3dd85 | 1974 | generic_fillattr(inode, stat); |
d7c103d0 | 1975 | if (unlock) |
dcf3dd85 SW |
1976 | gfs2_glock_dq_uninit(&gh); |
1977 | ||
1978 | return 0; | |
b3b94faa DT |
1979 | } |
1980 | ||
e9079cce SW |
1981 | static int gfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, |
1982 | u64 start, u64 len) | |
1983 | { | |
1984 | struct gfs2_inode *ip = GFS2_I(inode); | |
1985 | struct gfs2_holder gh; | |
1986 | int ret; | |
1987 | ||
1988 | ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC); | |
1989 | if (ret) | |
1990 | return ret; | |
1991 | ||
5955102c | 1992 | inode_lock(inode); |
e9079cce SW |
1993 | |
1994 | ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh); | |
1995 | if (ret) | |
1996 | goto out; | |
1997 | ||
1998 | if (gfs2_is_stuffed(ip)) { | |
1999 | u64 phys = ip->i_no_addr << inode->i_blkbits; | |
2000 | u64 size = i_size_read(inode); | |
2001 | u32 flags = FIEMAP_EXTENT_LAST|FIEMAP_EXTENT_NOT_ALIGNED| | |
2002 | FIEMAP_EXTENT_DATA_INLINE; | |
2003 | phys += sizeof(struct gfs2_dinode); | |
2004 | phys += start; | |
2005 | if (start + len > size) | |
2006 | len = size - start; | |
2007 | if (start < size) | |
2008 | ret = fiemap_fill_next_extent(fieinfo, start, phys, | |
2009 | len, flags); | |
2010 | if (ret == 1) | |
2011 | ret = 0; | |
2012 | } else { | |
2013 | ret = __generic_block_fiemap(inode, fieinfo, start, len, | |
2014 | gfs2_block_map); | |
2015 | } | |
2016 | ||
2017 | gfs2_glock_dq_uninit(&gh); | |
2018 | out: | |
5955102c | 2019 | inode_unlock(inode); |
e9079cce SW |
2020 | return ret; |
2021 | } | |
2022 | ||
92e1d5be | 2023 | const struct inode_operations gfs2_file_iops = { |
e6305c43 | 2024 | .permission = gfs2_permission, |
b3b94faa DT |
2025 | .setattr = gfs2_setattr, |
2026 | .getattr = gfs2_getattr, | |
1a39ba99 AV |
2027 | .setxattr = generic_setxattr, |
2028 | .getxattr = generic_getxattr, | |
b3b94faa | 2029 | .listxattr = gfs2_listxattr, |
1a39ba99 | 2030 | .removexattr = generic_removexattr, |
e9079cce | 2031 | .fiemap = gfs2_fiemap, |
4e34e719 | 2032 | .get_acl = gfs2_get_acl, |
e01580bf | 2033 | .set_acl = gfs2_set_acl, |
b3b94faa DT |
2034 | }; |
2035 | ||
92e1d5be | 2036 | const struct inode_operations gfs2_dir_iops = { |
b3b94faa DT |
2037 | .create = gfs2_create, |
2038 | .lookup = gfs2_lookup, | |
2039 | .link = gfs2_link, | |
2040 | .unlink = gfs2_unlink, | |
2041 | .symlink = gfs2_symlink, | |
2042 | .mkdir = gfs2_mkdir, | |
855d23ce | 2043 | .rmdir = gfs2_unlink, |
b3b94faa | 2044 | .mknod = gfs2_mknod, |
a63b7bbc | 2045 | .rename2 = gfs2_rename2, |
e6305c43 | 2046 | .permission = gfs2_permission, |
b3b94faa DT |
2047 | .setattr = gfs2_setattr, |
2048 | .getattr = gfs2_getattr, | |
1a39ba99 AV |
2049 | .setxattr = generic_setxattr, |
2050 | .getxattr = generic_getxattr, | |
b3b94faa | 2051 | .listxattr = gfs2_listxattr, |
1a39ba99 | 2052 | .removexattr = generic_removexattr, |
e9079cce | 2053 | .fiemap = gfs2_fiemap, |
4e34e719 | 2054 | .get_acl = gfs2_get_acl, |
e01580bf | 2055 | .set_acl = gfs2_set_acl, |
6d4ade98 | 2056 | .atomic_open = gfs2_atomic_open, |
b3b94faa DT |
2057 | }; |
2058 | ||
92e1d5be | 2059 | const struct inode_operations gfs2_symlink_iops = { |
c177c2ac | 2060 | .readlink = generic_readlink, |
6b255391 | 2061 | .get_link = gfs2_get_link, |
e6305c43 | 2062 | .permission = gfs2_permission, |
b3b94faa DT |
2063 | .setattr = gfs2_setattr, |
2064 | .getattr = gfs2_getattr, | |
1a39ba99 AV |
2065 | .setxattr = generic_setxattr, |
2066 | .getxattr = generic_getxattr, | |
b3b94faa | 2067 | .listxattr = gfs2_listxattr, |
1a39ba99 | 2068 | .removexattr = generic_removexattr, |
e9079cce | 2069 | .fiemap = gfs2_fiemap, |
b3b94faa DT |
2070 | }; |
2071 |