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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 | ||
cda9dd42 | 40 | static int iget_test(struct inode *inode, void *opaque) |
194c011f | 41 | { |
cda9dd42 AG |
42 | u64 no_addr = *(u64 *)opaque; |
43 | ||
44 | return GFS2_I(inode)->i_no_addr == no_addr; | |
45 | } | |
46 | ||
47 | static int iget_set(struct inode *inode, void *opaque) | |
48 | { | |
49 | u64 no_addr = *(u64 *)opaque; | |
50 | ||
51 | GFS2_I(inode)->i_no_addr = no_addr; | |
52 | inode->i_ino = no_addr; | |
53 | return 0; | |
54 | } | |
55 | ||
3ce37b2c AG |
56 | static struct inode *gfs2_iget(struct super_block *sb, u64 no_addr) |
57 | { | |
58 | struct inode *inode; | |
59 | ||
60 | repeat: | |
cda9dd42 | 61 | inode = iget5_locked(sb, no_addr, iget_test, iget_set, &no_addr); |
3ce37b2c AG |
62 | if (!inode) |
63 | return inode; | |
64 | if (is_bad_inode(inode)) { | |
65 | iput(inode); | |
66 | goto repeat; | |
67 | } | |
3ce37b2c | 68 | return inode; |
194c011f SW |
69 | } |
70 | ||
71 | /** | |
72 | * gfs2_set_iop - Sets inode operations | |
73 | * @inode: The inode with correct i_mode filled in | |
74 | * | |
75 | * GFS2 lookup code fills in vfs inode contents based on info obtained | |
76 | * from directory entry inside gfs2_inode_lookup(). | |
77 | */ | |
78 | ||
79 | static void gfs2_set_iop(struct inode *inode) | |
80 | { | |
81 | struct gfs2_sbd *sdp = GFS2_SB(inode); | |
82 | umode_t mode = inode->i_mode; | |
83 | ||
84 | if (S_ISREG(mode)) { | |
85 | inode->i_op = &gfs2_file_iops; | |
86 | if (gfs2_localflocks(sdp)) | |
87 | inode->i_fop = &gfs2_file_fops_nolock; | |
88 | else | |
89 | inode->i_fop = &gfs2_file_fops; | |
90 | } else if (S_ISDIR(mode)) { | |
91 | inode->i_op = &gfs2_dir_iops; | |
92 | if (gfs2_localflocks(sdp)) | |
93 | inode->i_fop = &gfs2_dir_fops_nolock; | |
94 | else | |
95 | inode->i_fop = &gfs2_dir_fops; | |
96 | } else if (S_ISLNK(mode)) { | |
97 | inode->i_op = &gfs2_symlink_iops; | |
98 | } else { | |
99 | inode->i_op = &gfs2_file_iops; | |
100 | init_special_inode(inode, inode->i_mode, inode->i_rdev); | |
101 | } | |
102 | } | |
103 | ||
104 | /** | |
105 | * gfs2_inode_lookup - Lookup an inode | |
106 | * @sb: The super block | |
194c011f | 107 | * @type: The type of the inode |
3ce37b2c AG |
108 | * @no_addr: The inode number |
109 | * @no_formal_ino: The inode generation number | |
110 | * @blktype: Requested block type (GFS2_BLKST_DINODE or GFS2_BLKST_UNLINKED; | |
111 | * GFS2_BLKST_FREE do indicate not to verify) | |
112 | * | |
113 | * If @type is DT_UNKNOWN, the inode type is fetched from disk. | |
114 | * | |
115 | * If @blktype is anything other than GFS2_BLKST_FREE (which is used as a | |
116 | * placeholder because it doesn't otherwise make sense), the on-disk block type | |
117 | * is verified to be @blktype. | |
194c011f SW |
118 | * |
119 | * Returns: A VFS inode, or an error | |
120 | */ | |
121 | ||
122 | struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned int type, | |
3ce37b2c AG |
123 | u64 no_addr, u64 no_formal_ino, |
124 | unsigned int blktype) | |
194c011f SW |
125 | { |
126 | struct inode *inode; | |
127 | struct gfs2_inode *ip; | |
128 | struct gfs2_glock *io_gl = NULL; | |
3ce37b2c | 129 | struct gfs2_holder i_gh; |
194c011f SW |
130 | int error; |
131 | ||
6df9f9a2 | 132 | gfs2_holder_mark_uninitialized(&i_gh); |
3ce37b2c | 133 | inode = gfs2_iget(sb, no_addr); |
194c011f | 134 | if (!inode) |
ac3beb6a | 135 | return ERR_PTR(-ENOMEM); |
194c011f | 136 | |
e97321fa | 137 | ip = GFS2_I(inode); |
e97321fa | 138 | |
194c011f SW |
139 | if (inode->i_state & I_NEW) { |
140 | struct gfs2_sbd *sdp = GFS2_SB(inode); | |
141 | ip->i_no_formal_ino = no_formal_ino; | |
142 | ||
143 | error = gfs2_glock_get(sdp, no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl); | |
144 | if (unlikely(error)) | |
145 | goto fail; | |
146 | ip->i_gl->gl_object = ip; | |
147 | ||
148 | error = gfs2_glock_get(sdp, no_addr, &gfs2_iopen_glops, CREATE, &io_gl); | |
149 | if (unlikely(error)) | |
150 | goto fail_put; | |
151 | ||
3ce37b2c AG |
152 | if (type == DT_UNKNOWN || blktype != GFS2_BLKST_FREE) { |
153 | /* | |
154 | * The GL_SKIP flag indicates to skip reading the inode | |
155 | * block. We read the inode with gfs2_inode_refresh | |
156 | * after possibly checking the block type. | |
157 | */ | |
158 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, | |
159 | GL_SKIP, &i_gh); | |
160 | if (error) | |
161 | goto fail_put; | |
3ce37b2c AG |
162 | |
163 | if (blktype != GFS2_BLKST_FREE) { | |
164 | error = gfs2_check_blk_type(sdp, no_addr, | |
165 | blktype); | |
166 | if (error) | |
167 | goto fail_put; | |
168 | } | |
169 | } | |
170 | ||
194c011f SW |
171 | set_bit(GIF_INVALID, &ip->i_flags); |
172 | error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh); | |
173 | if (unlikely(error)) | |
3ce37b2c | 174 | goto fail_put; |
194c011f SW |
175 | |
176 | ip->i_iopen_gh.gh_gl->gl_object = ip; | |
177 | gfs2_glock_put(io_gl); | |
178 | io_gl = NULL; | |
179 | ||
180 | if (type == DT_UNKNOWN) { | |
181 | /* Inode glock must be locked already */ | |
182 | error = gfs2_inode_refresh(GFS2_I(inode)); | |
183 | if (error) | |
184 | goto fail_refresh; | |
185 | } else { | |
186 | inode->i_mode = DT2IF(type); | |
187 | } | |
188 | ||
189 | gfs2_set_iop(inode); | |
190 | unlock_new_inode(inode); | |
191 | } | |
192 | ||
6df9f9a2 | 193 | if (gfs2_holder_initialized(&i_gh)) |
3ce37b2c | 194 | gfs2_glock_dq_uninit(&i_gh); |
194c011f SW |
195 | return inode; |
196 | ||
197 | fail_refresh: | |
a6a4d98b | 198 | ip->i_iopen_gh.gh_flags |= GL_NOCACHE; |
194c011f | 199 | ip->i_iopen_gh.gh_gl->gl_object = NULL; |
86d067a7 BP |
200 | gfs2_glock_dq_wait(&ip->i_iopen_gh); |
201 | gfs2_holder_uninit(&ip->i_iopen_gh); | |
3ce37b2c | 202 | fail_put: |
194c011f SW |
203 | if (io_gl) |
204 | gfs2_glock_put(io_gl); | |
6df9f9a2 | 205 | if (gfs2_holder_initialized(&i_gh)) |
3ce37b2c | 206 | gfs2_glock_dq_uninit(&i_gh); |
194c011f | 207 | ip->i_gl->gl_object = NULL; |
194c011f SW |
208 | fail: |
209 | iget_failed(inode); | |
210 | return ERR_PTR(error); | |
211 | } | |
212 | ||
213 | struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr, | |
214 | u64 *no_formal_ino, unsigned int blktype) | |
215 | { | |
216 | struct super_block *sb = sdp->sd_vfs; | |
3ce37b2c | 217 | struct inode *inode; |
194c011f SW |
218 | int error; |
219 | ||
3ce37b2c | 220 | inode = gfs2_inode_lookup(sb, DT_UNKNOWN, no_addr, 0, blktype); |
194c011f | 221 | if (IS_ERR(inode)) |
3ce37b2c | 222 | return inode; |
194c011f SW |
223 | |
224 | /* Two extra checks for NFS only */ | |
225 | if (no_formal_ino) { | |
226 | error = -ESTALE; | |
227 | if (GFS2_I(inode)->i_no_formal_ino != *no_formal_ino) | |
228 | goto fail_iput; | |
229 | ||
230 | error = -EIO; | |
231 | if (GFS2_I(inode)->i_diskflags & GFS2_DIF_SYSTEM) | |
232 | goto fail_iput; | |
194c011f | 233 | } |
3ce37b2c | 234 | return inode; |
194c011f | 235 | |
194c011f SW |
236 | fail_iput: |
237 | iput(inode); | |
3ce37b2c | 238 | return ERR_PTR(error); |
194c011f SW |
239 | } |
240 | ||
241 | ||
242 | struct inode *gfs2_lookup_simple(struct inode *dip, const char *name) | |
243 | { | |
244 | struct qstr qstr; | |
245 | struct inode *inode; | |
246 | gfs2_str2qstr(&qstr, name); | |
247 | inode = gfs2_lookupi(dip, &qstr, 1); | |
248 | /* gfs2_lookupi has inconsistent callers: vfs | |
249 | * related routines expect NULL for no entry found, | |
250 | * gfs2_lookup_simple callers expect ENOENT | |
251 | * and do not check for NULL. | |
252 | */ | |
253 | if (inode == NULL) | |
254 | return ERR_PTR(-ENOENT); | |
255 | else | |
256 | return inode; | |
257 | } | |
258 | ||
259 | ||
260 | /** | |
261 | * gfs2_lookupi - Look up a filename in a directory and return its inode | |
262 | * @d_gh: An initialized holder for the directory glock | |
263 | * @name: The name of the inode to look for | |
264 | * @is_root: If 1, ignore the caller's permissions | |
265 | * @i_gh: An uninitialized holder for the new inode glock | |
266 | * | |
267 | * This can be called via the VFS filldir function when NFS is doing | |
268 | * a readdirplus and the inode which its intending to stat isn't | |
269 | * already in cache. In this case we must not take the directory glock | |
270 | * again, since the readdir call will have already taken that lock. | |
271 | * | |
272 | * Returns: errno | |
273 | */ | |
274 | ||
275 | struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name, | |
276 | int is_root) | |
277 | { | |
278 | struct super_block *sb = dir->i_sb; | |
279 | struct gfs2_inode *dip = GFS2_I(dir); | |
280 | struct gfs2_holder d_gh; | |
281 | int error = 0; | |
282 | struct inode *inode = NULL; | |
194c011f | 283 | |
6df9f9a2 | 284 | gfs2_holder_mark_uninitialized(&d_gh); |
194c011f SW |
285 | if (!name->len || name->len > GFS2_FNAMESIZE) |
286 | return ERR_PTR(-ENAMETOOLONG); | |
287 | ||
288 | if ((name->len == 1 && memcmp(name->name, ".", 1) == 0) || | |
289 | (name->len == 2 && memcmp(name->name, "..", 2) == 0 && | |
2b0143b5 | 290 | dir == d_inode(sb->s_root))) { |
194c011f SW |
291 | igrab(dir); |
292 | return dir; | |
293 | } | |
294 | ||
295 | if (gfs2_glock_is_locked_by_me(dip->i_gl) == NULL) { | |
296 | error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh); | |
297 | if (error) | |
298 | return ERR_PTR(error); | |
194c011f SW |
299 | } |
300 | ||
301 | if (!is_root) { | |
10556cb2 | 302 | error = gfs2_permission(dir, MAY_EXEC); |
194c011f SW |
303 | if (error) |
304 | goto out; | |
305 | } | |
306 | ||
5a00f3cc | 307 | inode = gfs2_dir_search(dir, name, false); |
194c011f SW |
308 | if (IS_ERR(inode)) |
309 | error = PTR_ERR(inode); | |
310 | out: | |
6df9f9a2 | 311 | if (gfs2_holder_initialized(&d_gh)) |
194c011f SW |
312 | gfs2_glock_dq_uninit(&d_gh); |
313 | if (error == -ENOENT) | |
314 | return NULL; | |
315 | return inode ? inode : ERR_PTR(error); | |
316 | } | |
317 | ||
318 | /** | |
319 | * create_ok - OK to create a new on-disk inode here? | |
320 | * @dip: Directory in which dinode is to be created | |
321 | * @name: Name of new dinode | |
322 | * @mode: | |
323 | * | |
324 | * Returns: errno | |
325 | */ | |
326 | ||
327 | static int create_ok(struct gfs2_inode *dip, const struct qstr *name, | |
175a4eb7 | 328 | umode_t mode) |
194c011f SW |
329 | { |
330 | int error; | |
331 | ||
10556cb2 | 332 | error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC); |
194c011f SW |
333 | if (error) |
334 | return error; | |
335 | ||
336 | /* Don't create entries in an unlinked directory */ | |
337 | if (!dip->i_inode.i_nlink) | |
338 | return -ENOENT; | |
339 | ||
194c011f SW |
340 | if (dip->i_entries == (u32)-1) |
341 | return -EFBIG; | |
342 | if (S_ISDIR(mode) && dip->i_inode.i_nlink == (u32)-1) | |
343 | return -EMLINK; | |
344 | ||
345 | return 0; | |
346 | } | |
347 | ||
c9aecf73 SW |
348 | static void munge_mode_uid_gid(const struct gfs2_inode *dip, |
349 | struct inode *inode) | |
194c011f SW |
350 | { |
351 | if (GFS2_SB(&dip->i_inode)->sd_args.ar_suiddir && | |
6b24c0d2 EB |
352 | (dip->i_inode.i_mode & S_ISUID) && |
353 | !uid_eq(dip->i_inode.i_uid, GLOBAL_ROOT_UID)) { | |
c9aecf73 SW |
354 | if (S_ISDIR(inode->i_mode)) |
355 | inode->i_mode |= S_ISUID; | |
6b24c0d2 | 356 | else if (!uid_eq(dip->i_inode.i_uid, current_fsuid())) |
c9aecf73 SW |
357 | inode->i_mode &= ~07111; |
358 | inode->i_uid = dip->i_inode.i_uid; | |
194c011f | 359 | } else |
c9aecf73 | 360 | inode->i_uid = current_fsuid(); |
194c011f SW |
361 | |
362 | if (dip->i_inode.i_mode & S_ISGID) { | |
c9aecf73 SW |
363 | if (S_ISDIR(inode->i_mode)) |
364 | inode->i_mode |= S_ISGID; | |
365 | inode->i_gid = dip->i_inode.i_gid; | |
194c011f | 366 | } else |
c9aecf73 | 367 | inode->i_gid = current_fsgid(); |
194c011f SW |
368 | } |
369 | ||
b2c8b3ea | 370 | static int alloc_dinode(struct gfs2_inode *ip, u32 flags, unsigned *dblocks) |
194c011f | 371 | { |
c9aecf73 | 372 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b2c8b3ea | 373 | struct gfs2_alloc_parms ap = { .target = *dblocks, .aflags = flags, }; |
194c011f SW |
374 | int error; |
375 | ||
b8fbf471 | 376 | error = gfs2_quota_lock_check(ip, &ap); |
194c011f SW |
377 | if (error) |
378 | goto out; | |
379 | ||
7b9cff46 | 380 | error = gfs2_inplace_reserve(ip, &ap); |
fd4b4e04 SW |
381 | if (error) |
382 | goto out_quota; | |
383 | ||
b2c8b3ea | 384 | error = gfs2_trans_begin(sdp, (*dblocks * RES_RG_BIT) + RES_STATFS + RES_QUOTA, 0); |
194c011f SW |
385 | if (error) |
386 | goto out_ipreserv; | |
387 | ||
b2c8b3ea | 388 | error = gfs2_alloc_blocks(ip, &ip->i_no_addr, dblocks, 1, &ip->i_generation); |
c9aecf73 SW |
389 | ip->i_no_formal_ino = ip->i_generation; |
390 | ip->i_inode.i_ino = ip->i_no_addr; | |
391 | ip->i_goal = ip->i_no_addr; | |
194c011f SW |
392 | |
393 | gfs2_trans_end(sdp); | |
394 | ||
395 | out_ipreserv: | |
c9aecf73 | 396 | gfs2_inplace_release(ip); |
fd4b4e04 SW |
397 | out_quota: |
398 | gfs2_quota_unlock(ip); | |
194c011f | 399 | out: |
194c011f SW |
400 | return error; |
401 | } | |
402 | ||
f2741d98 SW |
403 | static void gfs2_init_dir(struct buffer_head *dibh, |
404 | const struct gfs2_inode *parent) | |
e2d0a13b SW |
405 | { |
406 | struct gfs2_dinode *di = (struct gfs2_dinode *)dibh->b_data; | |
407 | struct gfs2_dirent *dent = (struct gfs2_dirent *)(di+1); | |
408 | ||
409 | gfs2_qstr2dirent(&gfs2_qdot, GFS2_DIRENT_SIZE(gfs2_qdot.len), dent); | |
410 | dent->de_inum = di->di_num; /* already GFS2 endian */ | |
411 | dent->de_type = cpu_to_be16(DT_DIR); | |
412 | ||
413 | dent = (struct gfs2_dirent *)((char*)dent + GFS2_DIRENT_SIZE(1)); | |
414 | gfs2_qstr2dirent(&gfs2_qdotdot, dibh->b_size - GFS2_DIRENT_SIZE(1) - sizeof(struct gfs2_dinode), dent); | |
415 | gfs2_inum_out(parent, dent); | |
416 | dent->de_type = cpu_to_be16(DT_DIR); | |
417 | ||
418 | } | |
419 | ||
b2c8b3ea SW |
420 | /** |
421 | * gfs2_init_xattr - Initialise an xattr block for a new inode | |
422 | * @ip: The inode in question | |
423 | * | |
424 | * This sets up an empty xattr block for a new inode, ready to | |
425 | * take any ACLs, LSM xattrs, etc. | |
426 | */ | |
427 | ||
428 | static void gfs2_init_xattr(struct gfs2_inode *ip) | |
429 | { | |
430 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); | |
431 | struct buffer_head *bh; | |
432 | struct gfs2_ea_header *ea; | |
433 | ||
434 | bh = gfs2_meta_new(ip->i_gl, ip->i_eattr); | |
435 | gfs2_trans_add_meta(ip->i_gl, bh); | |
436 | gfs2_metatype_set(bh, GFS2_METATYPE_EA, GFS2_FORMAT_EA); | |
437 | gfs2_buffer_clear_tail(bh, sizeof(struct gfs2_meta_header)); | |
438 | ||
439 | ea = GFS2_EA_BH2FIRST(bh); | |
440 | ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize); | |
441 | ea->ea_type = GFS2_EATYPE_UNUSED; | |
442 | ea->ea_flags = GFS2_EAFLAG_LAST; | |
443 | ||
444 | brelse(bh); | |
445 | } | |
446 | ||
194c011f SW |
447 | /** |
448 | * init_dinode - Fill in a new dinode structure | |
f2741d98 | 449 | * @dip: The directory this inode is being created in |
c9aecf73 | 450 | * @ip: The inode |
f2741d98 | 451 | * @symname: The symlink destination (if a symlink) |
f2741d98 | 452 | * @bhp: The buffer head (returned to caller) |
194c011f SW |
453 | * |
454 | */ | |
455 | ||
c9aecf73 | 456 | static void init_dinode(struct gfs2_inode *dip, struct gfs2_inode *ip, |
79ba7480 | 457 | const char *symname) |
194c011f | 458 | { |
194c011f SW |
459 | struct gfs2_dinode *di; |
460 | struct buffer_head *dibh; | |
194c011f | 461 | |
c9aecf73 | 462 | dibh = gfs2_meta_new(ip->i_gl, ip->i_no_addr); |
350a9b0a | 463 | gfs2_trans_add_meta(ip->i_gl, dibh); |
194c011f | 464 | di = (struct gfs2_dinode *)dibh->b_data; |
79ba7480 | 465 | gfs2_dinode_out(ip, di); |
194c011f | 466 | |
c9aecf73 SW |
467 | di->di_major = cpu_to_be32(MAJOR(ip->i_inode.i_rdev)); |
468 | di->di_minor = cpu_to_be32(MINOR(ip->i_inode.i_rdev)); | |
194c011f | 469 | di->__pad1 = 0; |
194c011f SW |
470 | di->__pad2 = 0; |
471 | di->__pad3 = 0; | |
194c011f | 472 | memset(&di->__pad4, 0, sizeof(di->__pad4)); |
194c011f | 473 | memset(&di->di_reserved, 0, sizeof(di->di_reserved)); |
79ba7480 | 474 | gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode)); |
160b4026 | 475 | |
c9aecf73 | 476 | switch(ip->i_inode.i_mode & S_IFMT) { |
160b4026 | 477 | case S_IFDIR: |
e2d0a13b | 478 | gfs2_init_dir(dibh, dip); |
160b4026 SW |
479 | break; |
480 | case S_IFLNK: | |
c9aecf73 | 481 | memcpy(dibh->b_data + sizeof(struct gfs2_dinode), symname, ip->i_inode.i_size); |
160b4026 | 482 | break; |
e2d0a13b SW |
483 | } |
484 | ||
194c011f | 485 | set_buffer_uptodate(dibh); |
79ba7480 | 486 | brelse(dibh); |
194c011f SW |
487 | } |
488 | ||
534cf9ca SW |
489 | /** |
490 | * gfs2_trans_da_blocks - Calculate number of blocks to link inode | |
491 | * @dip: The directory we are linking into | |
492 | * @da: The dir add information | |
493 | * @nr_inodes: The number of inodes involved | |
494 | * | |
495 | * This calculate the number of blocks we need to reserve in a | |
496 | * transaction to link @nr_inodes into a directory. In most cases | |
497 | * @nr_inodes will be 2 (the directory plus the inode being linked in) | |
498 | * but in case of rename, 4 may be required. | |
499 | * | |
500 | * Returns: Number of blocks | |
501 | */ | |
502 | ||
503 | static unsigned gfs2_trans_da_blks(const struct gfs2_inode *dip, | |
504 | const struct gfs2_diradd *da, | |
505 | unsigned nr_inodes) | |
506 | { | |
507 | return da->nr_blocks + gfs2_rg_blocks(dip, da->nr_blocks) + | |
508 | (nr_inodes * RES_DINODE) + RES_QUOTA + RES_STATFS; | |
509 | } | |
510 | ||
194c011f | 511 | static int link_dinode(struct gfs2_inode *dip, const struct qstr *name, |
3c1c0ae1 | 512 | struct gfs2_inode *ip, struct gfs2_diradd *da) |
194c011f SW |
513 | { |
514 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); | |
3c1c0ae1 | 515 | struct gfs2_alloc_parms ap = { .target = da->nr_blocks, }; |
194c011f SW |
516 | int error; |
517 | ||
3c1c0ae1 | 518 | if (da->nr_blocks) { |
b8fbf471 | 519 | error = gfs2_quota_lock_check(dip, &ap); |
194c011f SW |
520 | if (error) |
521 | goto fail_quota_locks; | |
522 | ||
7b9cff46 | 523 | error = gfs2_inplace_reserve(dip, &ap); |
194c011f SW |
524 | if (error) |
525 | goto fail_quota_locks; | |
526 | ||
534cf9ca | 527 | error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, da, 2), 0); |
194c011f SW |
528 | if (error) |
529 | goto fail_ipreserv; | |
530 | } else { | |
531 | error = gfs2_trans_begin(sdp, RES_LEAF + 2 * RES_DINODE, 0); | |
532 | if (error) | |
533 | goto fail_quota_locks; | |
534 | } | |
535 | ||
2b47dad8 | 536 | error = gfs2_dir_add(&dip->i_inode, name, ip, da); |
194c011f | 537 | |
194c011f | 538 | gfs2_trans_end(sdp); |
194c011f | 539 | fail_ipreserv: |
fd4b4e04 | 540 | gfs2_inplace_release(dip); |
194c011f SW |
541 | fail_quota_locks: |
542 | gfs2_quota_unlock(dip); | |
194c011f SW |
543 | return error; |
544 | } | |
545 | ||
46cc1e5f | 546 | static int gfs2_initxattrs(struct inode *inode, const struct xattr *xattr_array, |
9d8f13ba | 547 | void *fs_info) |
194c011f | 548 | { |
9d8f13ba MZ |
549 | const struct xattr *xattr; |
550 | int err = 0; | |
551 | ||
552 | for (xattr = xattr_array; xattr->name != NULL; xattr++) { | |
553 | err = __gfs2_xattr_set(inode, xattr->name, xattr->value, | |
554 | xattr->value_len, 0, | |
555 | GFS2_EATYPE_SECURITY); | |
556 | if (err < 0) | |
557 | break; | |
194c011f | 558 | } |
194c011f SW |
559 | return err; |
560 | } | |
b3b94faa | 561 | |
194c011f | 562 | /** |
f2741d98 SW |
563 | * gfs2_create_inode - Create a new inode |
564 | * @dir: The parent directory | |
565 | * @dentry: The new dentry | |
6d4ade98 | 566 | * @file: If non-NULL, the file which is being opened |
f2741d98 SW |
567 | * @mode: The permissions on the new inode |
568 | * @dev: For device nodes, this is the device number | |
569 | * @symname: For symlinks, this is the link destination | |
570 | * @size: The initial size of the inode (ignored for directories) | |
194c011f | 571 | * |
f2741d98 | 572 | * Returns: 0 on success, or error code |
194c011f SW |
573 | */ |
574 | ||
f2741d98 | 575 | static int gfs2_create_inode(struct inode *dir, struct dentry *dentry, |
6d4ade98 | 576 | struct file *file, |
175a4eb7 | 577 | umode_t mode, dev_t dev, const char *symname, |
6d4ade98 | 578 | unsigned int size, int excl, int *opened) |
194c011f | 579 | { |
f2741d98 | 580 | const struct qstr *name = &dentry->d_name; |
e01580bf | 581 | struct posix_acl *default_acl, *acl; |
f2741d98 | 582 | struct gfs2_holder ghs[2]; |
194c011f | 583 | struct inode *inode = NULL; |
8e2e0047 | 584 | struct gfs2_inode *dip = GFS2_I(dir), *ip; |
194c011f | 585 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); |
a4923865 | 586 | struct gfs2_glock *io_gl = NULL; |
783013c0 | 587 | int error, free_vfs_inode = 1; |
9dbe9610 | 588 | u32 aflags = 0; |
b2c8b3ea | 589 | unsigned blocks = 1; |
19aeb5a6 | 590 | struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, }; |
194c011f SW |
591 | |
592 | if (!name->len || name->len > GFS2_FNAMESIZE) | |
f2741d98 | 593 | return -ENAMETOOLONG; |
194c011f | 594 | |
b54e9a0b | 595 | error = gfs2_rsqa_alloc(dip); |
0a305e49 BP |
596 | if (error) |
597 | return error; | |
598 | ||
fd4b4e04 SW |
599 | error = gfs2_rindex_update(sdp); |
600 | if (error) | |
601 | return error; | |
602 | ||
f2741d98 | 603 | error = gfs2_glock_nq_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); |
194c011f SW |
604 | if (error) |
605 | goto fail; | |
606 | ||
607 | error = create_ok(dip, name, mode); | |
5a00f3cc SW |
608 | if (error) |
609 | goto fail_gunlock; | |
610 | ||
611 | inode = gfs2_dir_search(dir, &dentry->d_name, !S_ISREG(mode) || excl); | |
612 | error = PTR_ERR(inode); | |
613 | if (!IS_ERR(inode)) { | |
571a4b57 AV |
614 | if (S_ISDIR(inode->i_mode)) { |
615 | iput(inode); | |
616 | inode = ERR_PTR(-EISDIR); | |
617 | goto fail_gunlock; | |
618 | } | |
44bb31ba | 619 | d_instantiate(dentry, inode); |
6d4ade98 | 620 | error = 0; |
0d0d1107 | 621 | if (file) { |
44bb31ba | 622 | if (S_ISREG(inode->i_mode)) |
5ca1db41 | 623 | error = finish_open(file, dentry, gfs2_open_common, opened); |
44bb31ba AV |
624 | else |
625 | error = finish_no_open(file, NULL); | |
6d4ade98 | 626 | } |
9a63edd1 | 627 | gfs2_glock_dq_uninit(ghs); |
6d4ade98 | 628 | return error; |
5a00f3cc | 629 | } else if (error != -ENOENT) { |
194c011f | 630 | goto fail_gunlock; |
5a00f3cc | 631 | } |
194c011f | 632 | |
3c1c0ae1 | 633 | error = gfs2_diradd_alloc_required(dir, name, &da); |
fd4b4e04 SW |
634 | if (error < 0) |
635 | goto fail_gunlock; | |
636 | ||
c9aecf73 | 637 | inode = new_inode(sdp->sd_vfs); |
fd4b4e04 SW |
638 | error = -ENOMEM; |
639 | if (!inode) | |
640 | goto fail_gunlock; | |
641 | ||
e01580bf CH |
642 | error = posix_acl_create(dir, &mode, &default_acl, &acl); |
643 | if (error) | |
783013c0 | 644 | goto fail_gunlock; |
e01580bf | 645 | |
c9aecf73 | 646 | ip = GFS2_I(inode); |
b54e9a0b | 647 | error = gfs2_rsqa_alloc(ip); |
194c011f | 648 | if (error) |
e01580bf | 649 | goto fail_free_acls; |
c9aecf73 | 650 | |
c9aecf73 | 651 | inode->i_mode = mode; |
79ba7480 | 652 | set_nlink(inode, S_ISDIR(mode) ? 2 : 1); |
c9aecf73 SW |
653 | inode->i_rdev = dev; |
654 | inode->i_size = size; | |
fd4b4e04 | 655 | inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; |
28fb3027 | 656 | gfs2_set_inode_blocks(inode, 1); |
c9aecf73 | 657 | munge_mode_uid_gid(dip, inode); |
00a158be | 658 | check_and_update_goal(dip); |
c9aecf73 | 659 | ip->i_goal = dip->i_goal; |
28fb3027 SW |
660 | ip->i_diskflags = 0; |
661 | ip->i_eattr = 0; | |
662 | ip->i_height = 0; | |
663 | ip->i_depth = 0; | |
664 | ip->i_entries = 0; | |
665 | ||
666 | switch(mode & S_IFMT) { | |
667 | case S_IFREG: | |
668 | if ((dip->i_diskflags & GFS2_DIF_INHERIT_JDATA) || | |
669 | gfs2_tune_get(sdp, gt_new_files_jdata)) | |
670 | ip->i_diskflags |= GFS2_DIF_JDATA; | |
671 | gfs2_set_aops(inode); | |
672 | break; | |
673 | case S_IFDIR: | |
674 | ip->i_diskflags |= (dip->i_diskflags & GFS2_DIF_INHERIT_JDATA); | |
675 | ip->i_diskflags |= GFS2_DIF_JDATA; | |
676 | ip->i_entries = 2; | |
677 | break; | |
678 | } | |
acc546fd AD |
679 | |
680 | /* Force SYSTEM flag on all files and subdirs of a SYSTEM directory */ | |
681 | if (dip->i_diskflags & GFS2_DIF_SYSTEM) | |
682 | ip->i_diskflags |= GFS2_DIF_SYSTEM; | |
683 | ||
28fb3027 | 684 | gfs2_set_inode_flags(inode); |
194c011f | 685 | |
2b0143b5 | 686 | if ((GFS2_I(d_inode(sdp->sd_root_dir)) == dip) || |
9dbe9610 SW |
687 | (dip->i_diskflags & GFS2_DIF_TOPDIR)) |
688 | aflags |= GFS2_AF_ORLOV; | |
689 | ||
b2c8b3ea SW |
690 | if (default_acl || acl) |
691 | blocks++; | |
692 | ||
693 | error = alloc_dinode(ip, aflags, &blocks); | |
194c011f | 694 | if (error) |
c9aecf73 | 695 | goto fail_free_inode; |
194c011f | 696 | |
b2c8b3ea SW |
697 | gfs2_set_inode_blocks(inode, blocks); |
698 | ||
c9aecf73 | 699 | error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl); |
194c011f | 700 | if (error) |
c9aecf73 | 701 | goto fail_free_inode; |
194c011f | 702 | |
1e2d9d44 | 703 | ip->i_gl->gl_object = ip; |
c9aecf73 SW |
704 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1); |
705 | if (error) | |
706 | goto fail_free_inode; | |
707 | ||
b2c8b3ea | 708 | error = gfs2_trans_begin(sdp, blocks, 0); |
c9aecf73 | 709 | if (error) |
194c011f SW |
710 | goto fail_gunlock2; |
711 | ||
b2c8b3ea SW |
712 | if (blocks > 1) { |
713 | ip->i_eattr = ip->i_no_addr + 1; | |
714 | gfs2_init_xattr(ip); | |
715 | } | |
79ba7480 | 716 | init_dinode(dip, ip, symname); |
fd4b4e04 SW |
717 | gfs2_trans_end(sdp); |
718 | ||
c9aecf73 | 719 | error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_iopen_glops, CREATE, &io_gl); |
194c011f SW |
720 | if (error) |
721 | goto fail_gunlock2; | |
722 | ||
a4923865 BP |
723 | BUG_ON(test_and_set_bit(GLF_INODE_CREATING, &io_gl->gl_flags)); |
724 | ||
c9aecf73 | 725 | error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh); |
ff7f4cb4 SW |
726 | if (error) |
727 | goto fail_gunlock2; | |
0a305e49 | 728 | |
c9aecf73 SW |
729 | ip->i_iopen_gh.gh_gl->gl_object = ip; |
730 | gfs2_glock_put(io_gl); | |
731 | gfs2_set_iop(inode); | |
732 | insert_inode_hash(inode); | |
733 | ||
783013c0 BP |
734 | free_vfs_inode = 0; /* After this point, the inode is no longer |
735 | considered free. Any failures need to undo | |
736 | the gfs2 structures. */ | |
e01580bf | 737 | if (default_acl) { |
1a39ba99 | 738 | error = __gfs2_set_acl(inode, default_acl, ACL_TYPE_DEFAULT); |
e01580bf CH |
739 | posix_acl_release(default_acl); |
740 | } | |
741 | if (acl) { | |
742 | if (!error) | |
1a39ba99 | 743 | error = __gfs2_set_acl(inode, acl, ACL_TYPE_ACCESS); |
e01580bf CH |
744 | posix_acl_release(acl); |
745 | } | |
746 | ||
194c011f | 747 | if (error) |
c9aecf73 | 748 | goto fail_gunlock3; |
194c011f | 749 | |
f45dc26d BP |
750 | error = security_inode_init_security(&ip->i_inode, &dip->i_inode, name, |
751 | &gfs2_initxattrs, NULL); | |
194c011f | 752 | if (error) |
c9aecf73 | 753 | goto fail_gunlock3; |
194c011f | 754 | |
3c1c0ae1 | 755 | error = link_dinode(dip, name, ip, &da); |
194c011f | 756 | if (error) |
c9aecf73 | 757 | goto fail_gunlock3; |
194c011f | 758 | |
79ba7480 | 759 | mark_inode_dirty(inode); |
6d4ade98 | 760 | d_instantiate(dentry, inode); |
c5bf8fef MS |
761 | if (file) { |
762 | *opened |= FILE_CREATED; | |
6d4ade98 | 763 | error = finish_open(file, dentry, gfs2_open_common, opened); |
c5bf8fef | 764 | } |
28fb3027 SW |
765 | gfs2_glock_dq_uninit(ghs); |
766 | gfs2_glock_dq_uninit(ghs + 1); | |
a4923865 | 767 | clear_bit(GLF_INODE_CREATING, &io_gl->gl_flags); |
6d4ade98 | 768 | return error; |
194c011f | 769 | |
c9aecf73 | 770 | fail_gunlock3: |
783013c0 BP |
771 | gfs2_glock_dq_uninit(&ip->i_iopen_gh); |
772 | gfs2_glock_put(io_gl); | |
194c011f | 773 | fail_gunlock2: |
a4923865 BP |
774 | if (io_gl) |
775 | clear_bit(GLF_INODE_CREATING, &io_gl->gl_flags); | |
194c011f | 776 | gfs2_glock_dq_uninit(ghs + 1); |
c9aecf73 SW |
777 | fail_free_inode: |
778 | if (ip->i_gl) | |
779 | gfs2_glock_put(ip->i_gl); | |
b54e9a0b | 780 | gfs2_rsqa_delete(ip, NULL); |
e01580bf CH |
781 | fail_free_acls: |
782 | if (default_acl) | |
783 | posix_acl_release(default_acl); | |
784 | if (acl) | |
785 | posix_acl_release(acl); | |
194c011f | 786 | fail_gunlock: |
2b47dad8 | 787 | gfs2_dir_no_add(&da); |
f2741d98 | 788 | gfs2_glock_dq_uninit(ghs); |
40ac218f | 789 | if (inode && !IS_ERR(inode)) { |
79ba7480 | 790 | clear_nlink(inode); |
05978803 AD |
791 | if (!free_vfs_inode) |
792 | mark_inode_dirty(inode); | |
793 | set_bit(free_vfs_inode ? GIF_FREE_VFS_INODE : GIF_ALLOC_FAILED, | |
794 | &GFS2_I(inode)->i_flags); | |
40ac218f SW |
795 | iput(inode); |
796 | } | |
194c011f | 797 | fail: |
f2741d98 | 798 | return error; |
194c011f | 799 | } |
f2741d98 | 800 | |
b3b94faa DT |
801 | /** |
802 | * gfs2_create - Create a file | |
803 | * @dir: The directory in which to create the file | |
804 | * @dentry: The dentry of the new file | |
805 | * @mode: The mode of the new file | |
806 | * | |
807 | * Returns: errno | |
808 | */ | |
809 | ||
810 | static int gfs2_create(struct inode *dir, struct dentry *dentry, | |
ebfc3b49 | 811 | umode_t mode, bool excl) |
b3b94faa | 812 | { |
6d4ade98 | 813 | return gfs2_create_inode(dir, dentry, NULL, S_IFREG | mode, 0, NULL, 0, excl, NULL); |
b3b94faa DT |
814 | } |
815 | ||
816 | /** | |
6d4ade98 | 817 | * __gfs2_lookup - Look up a filename in a directory and return its inode |
b3b94faa DT |
818 | * @dir: The directory inode |
819 | * @dentry: The dentry of the new inode | |
6d4ade98 SW |
820 | * @file: File to be opened |
821 | * @opened: atomic_open flags | |
b3b94faa | 822 | * |
b3b94faa DT |
823 | * |
824 | * Returns: errno | |
825 | */ | |
826 | ||
6d4ade98 SW |
827 | static struct dentry *__gfs2_lookup(struct inode *dir, struct dentry *dentry, |
828 | struct file *file, int *opened) | |
b3b94faa | 829 | { |
6d4ade98 SW |
830 | struct inode *inode; |
831 | struct dentry *d; | |
832 | struct gfs2_holder gh; | |
833 | struct gfs2_glock *gl; | |
834 | int error; | |
835 | ||
836 | inode = gfs2_lookupi(dir, &dentry->d_name, 0); | |
7b7a9115 BC |
837 | if (inode == NULL) { |
838 | d_add(dentry, NULL); | |
6d4ade98 | 839 | return NULL; |
7b7a9115 | 840 | } |
6d4ade98 SW |
841 | if (IS_ERR(inode)) |
842 | return ERR_CAST(inode); | |
843 | ||
844 | gl = GFS2_I(inode)->i_gl; | |
845 | error = gfs2_glock_nq_init(gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); | |
846 | if (error) { | |
847 | iput(inode); | |
848 | return ERR_PTR(error); | |
9656b2c1 | 849 | } |
6d4ade98 SW |
850 | |
851 | d = d_splice_alias(inode, dentry); | |
d57b9c9a | 852 | if (IS_ERR(d)) { |
d57b9c9a BF |
853 | gfs2_glock_dq_uninit(&gh); |
854 | return d; | |
855 | } | |
6d4ade98 SW |
856 | if (file && S_ISREG(inode->i_mode)) |
857 | error = finish_open(file, dentry, gfs2_open_common, opened); | |
858 | ||
859 | gfs2_glock_dq_uninit(&gh); | |
5ca1db41 MS |
860 | if (error) { |
861 | dput(d); | |
6d4ade98 | 862 | return ERR_PTR(error); |
5ca1db41 | 863 | } |
6d4ade98 SW |
864 | return d; |
865 | } | |
866 | ||
867 | static struct dentry *gfs2_lookup(struct inode *dir, struct dentry *dentry, | |
868 | unsigned flags) | |
869 | { | |
870 | return __gfs2_lookup(dir, dentry, NULL, NULL); | |
b3b94faa DT |
871 | } |
872 | ||
873 | /** | |
874 | * gfs2_link - Link to a file | |
875 | * @old_dentry: The inode to link | |
876 | * @dir: Add link to this directory | |
877 | * @dentry: The name of the link | |
878 | * | |
879 | * Link the inode in "old_dentry" into the directory "dir" with the | |
880 | * name in "dentry". | |
881 | * | |
882 | * Returns: errno | |
883 | */ | |
884 | ||
885 | static int gfs2_link(struct dentry *old_dentry, struct inode *dir, | |
886 | struct dentry *dentry) | |
887 | { | |
feaa7bba SW |
888 | struct gfs2_inode *dip = GFS2_I(dir); |
889 | struct gfs2_sbd *sdp = GFS2_SB(dir); | |
2b0143b5 | 890 | struct inode *inode = d_inode(old_dentry); |
feaa7bba | 891 | struct gfs2_inode *ip = GFS2_I(inode); |
b3b94faa | 892 | struct gfs2_holder ghs[2]; |
2baee03f | 893 | struct buffer_head *dibh; |
19aeb5a6 | 894 | struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, }; |
b3b94faa DT |
895 | int error; |
896 | ||
b60623c2 | 897 | if (S_ISDIR(inode->i_mode)) |
b3b94faa DT |
898 | return -EPERM; |
899 | ||
b54e9a0b | 900 | error = gfs2_rsqa_alloc(dip); |
0a305e49 BP |
901 | if (error) |
902 | return error; | |
903 | ||
b3b94faa DT |
904 | gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); |
905 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); | |
906 | ||
72dbf479 BP |
907 | error = gfs2_glock_nq(ghs); /* parent */ |
908 | if (error) | |
909 | goto out_parent; | |
910 | ||
911 | error = gfs2_glock_nq(ghs + 1); /* child */ | |
b3b94faa | 912 | if (error) |
72dbf479 | 913 | goto out_child; |
b3b94faa | 914 | |
d192a8e5 SW |
915 | error = -ENOENT; |
916 | if (inode->i_nlink == 0) | |
917 | goto out_gunlock; | |
918 | ||
10556cb2 | 919 | error = gfs2_permission(dir, MAY_WRITE | MAY_EXEC); |
b3b94faa DT |
920 | if (error) |
921 | goto out_gunlock; | |
922 | ||
dbb7cae2 | 923 | error = gfs2_dir_check(dir, &dentry->d_name, NULL); |
b3b94faa DT |
924 | switch (error) { |
925 | case -ENOENT: | |
926 | break; | |
927 | case 0: | |
928 | error = -EEXIST; | |
929 | default: | |
930 | goto out_gunlock; | |
931 | } | |
932 | ||
933 | error = -EINVAL; | |
4f56110a | 934 | if (!dip->i_inode.i_nlink) |
b3b94faa DT |
935 | goto out_gunlock; |
936 | error = -EFBIG; | |
ad6203f2 | 937 | if (dip->i_entries == (u32)-1) |
b3b94faa DT |
938 | goto out_gunlock; |
939 | error = -EPERM; | |
940 | if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) | |
941 | goto out_gunlock; | |
942 | error = -EINVAL; | |
4f56110a | 943 | if (!ip->i_inode.i_nlink) |
b3b94faa DT |
944 | goto out_gunlock; |
945 | error = -EMLINK; | |
4f56110a | 946 | if (ip->i_inode.i_nlink == (u32)-1) |
b3b94faa DT |
947 | goto out_gunlock; |
948 | ||
3c1c0ae1 | 949 | error = gfs2_diradd_alloc_required(dir, &dentry->d_name, &da); |
c752666c | 950 | if (error < 0) |
b3b94faa DT |
951 | goto out_gunlock; |
952 | ||
3c1c0ae1 SW |
953 | if (da.nr_blocks) { |
954 | struct gfs2_alloc_parms ap = { .target = da.nr_blocks, }; | |
b8fbf471 | 955 | error = gfs2_quota_lock_check(dip, &ap); |
b3b94faa | 956 | if (error) |
5407e242 | 957 | goto out_gunlock; |
b3b94faa | 958 | |
7b9cff46 | 959 | error = gfs2_inplace_reserve(dip, &ap); |
b3b94faa DT |
960 | if (error) |
961 | goto out_gunlock_q; | |
962 | ||
534cf9ca | 963 | error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, &da, 2), 0); |
b3b94faa DT |
964 | if (error) |
965 | goto out_ipres; | |
966 | } else { | |
967 | error = gfs2_trans_begin(sdp, 2 * RES_DINODE + RES_LEAF, 0); | |
968 | if (error) | |
969 | goto out_ipres; | |
970 | } | |
971 | ||
2baee03f | 972 | error = gfs2_meta_inode_buffer(ip, &dibh); |
b3b94faa DT |
973 | if (error) |
974 | goto out_end_trans; | |
975 | ||
2b47dad8 | 976 | error = gfs2_dir_add(dir, &dentry->d_name, ip, &da); |
2baee03f SW |
977 | if (error) |
978 | goto out_brelse; | |
979 | ||
350a9b0a | 980 | gfs2_trans_add_meta(ip->i_gl, dibh); |
2baee03f SW |
981 | inc_nlink(&ip->i_inode); |
982 | ip->i_inode.i_ctime = CURRENT_TIME; | |
ab9bbda0 SW |
983 | ihold(inode); |
984 | d_instantiate(dentry, inode); | |
985 | mark_inode_dirty(inode); | |
b3b94faa | 986 | |
2baee03f SW |
987 | out_brelse: |
988 | brelse(dibh); | |
feaa7bba | 989 | out_end_trans: |
b3b94faa | 990 | gfs2_trans_end(sdp); |
feaa7bba | 991 | out_ipres: |
3c1c0ae1 | 992 | if (da.nr_blocks) |
b3b94faa | 993 | gfs2_inplace_release(dip); |
feaa7bba | 994 | out_gunlock_q: |
3c1c0ae1 | 995 | if (da.nr_blocks) |
b3b94faa | 996 | gfs2_quota_unlock(dip); |
feaa7bba | 997 | out_gunlock: |
2b47dad8 | 998 | gfs2_dir_no_add(&da); |
72dbf479 BP |
999 | gfs2_glock_dq(ghs + 1); |
1000 | out_child: | |
1001 | gfs2_glock_dq(ghs); | |
1002 | out_parent: | |
b3b94faa DT |
1003 | gfs2_holder_uninit(ghs); |
1004 | gfs2_holder_uninit(ghs + 1); | |
b3b94faa DT |
1005 | return error; |
1006 | } | |
1007 | ||
87ec2174 SW |
1008 | /* |
1009 | * gfs2_unlink_ok - check to see that a inode is still in a directory | |
1010 | * @dip: the directory | |
1011 | * @name: the name of the file | |
1012 | * @ip: the inode | |
1013 | * | |
1014 | * Assumes that the lock on (at least) @dip is held. | |
1015 | * | |
1016 | * Returns: 0 if the parent/child relationship is correct, errno if it isn't | |
1017 | */ | |
1018 | ||
1019 | static int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name, | |
1020 | const struct gfs2_inode *ip) | |
1021 | { | |
1022 | int error; | |
1023 | ||
1024 | if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode)) | |
1025 | return -EPERM; | |
1026 | ||
1027 | if ((dip->i_inode.i_mode & S_ISVTX) && | |
6b24c0d2 EB |
1028 | !uid_eq(dip->i_inode.i_uid, current_fsuid()) && |
1029 | !uid_eq(ip->i_inode.i_uid, current_fsuid()) && !capable(CAP_FOWNER)) | |
87ec2174 SW |
1030 | return -EPERM; |
1031 | ||
1032 | if (IS_APPEND(&dip->i_inode)) | |
1033 | return -EPERM; | |
1034 | ||
10556cb2 | 1035 | error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC); |
87ec2174 SW |
1036 | if (error) |
1037 | return error; | |
1038 | ||
37975f15 | 1039 | return gfs2_dir_check(&dip->i_inode, name, ip); |
87ec2174 SW |
1040 | } |
1041 | ||
b3b94faa | 1042 | /** |
855d23ce SW |
1043 | * gfs2_unlink_inode - Removes an inode from its parent dir and unlinks it |
1044 | * @dip: The parent directory | |
1045 | * @name: The name of the entry in the parent directory | |
855d23ce SW |
1046 | * @inode: The inode to be removed |
1047 | * | |
1048 | * Called with all the locks and in a transaction. This will only be | |
1049 | * called for a directory after it has been checked to ensure it is empty. | |
1050 | * | |
1051 | * Returns: 0 on success, or an error | |
1052 | */ | |
1053 | ||
1054 | static int gfs2_unlink_inode(struct gfs2_inode *dip, | |
4327a9bf | 1055 | const struct dentry *dentry) |
855d23ce | 1056 | { |
2b0143b5 | 1057 | struct inode *inode = d_inode(dentry); |
855d23ce SW |
1058 | struct gfs2_inode *ip = GFS2_I(inode); |
1059 | int error; | |
1060 | ||
1061 | error = gfs2_dir_del(dip, dentry); | |
1062 | if (error) | |
1063 | return error; | |
1064 | ||
1065 | ip->i_entries = 0; | |
1066 | inode->i_ctime = CURRENT_TIME; | |
1067 | if (S_ISDIR(inode->i_mode)) | |
1068 | clear_nlink(inode); | |
1069 | else | |
1070 | drop_nlink(inode); | |
855d23ce SW |
1071 | mark_inode_dirty(inode); |
1072 | if (inode->i_nlink == 0) | |
1073 | gfs2_unlink_di(inode); | |
1074 | return 0; | |
1075 | } | |
1076 | ||
1077 | ||
1078 | /** | |
1079 | * gfs2_unlink - Unlink an inode (this does rmdir as well) | |
1080 | * @dir: The inode of the directory containing the inode to unlink | |
b3b94faa DT |
1081 | * @dentry: The file itself |
1082 | * | |
855d23ce SW |
1083 | * This routine uses the type of the inode as a flag to figure out |
1084 | * whether this is an unlink or an rmdir. | |
b3b94faa DT |
1085 | * |
1086 | * Returns: errno | |
1087 | */ | |
1088 | ||
1089 | static int gfs2_unlink(struct inode *dir, struct dentry *dentry) | |
1090 | { | |
feaa7bba SW |
1091 | struct gfs2_inode *dip = GFS2_I(dir); |
1092 | struct gfs2_sbd *sdp = GFS2_SB(dir); | |
2b0143b5 | 1093 | struct inode *inode = d_inode(dentry); |
855d23ce | 1094 | struct gfs2_inode *ip = GFS2_I(inode); |
ddee7608 RC |
1095 | struct gfs2_holder ghs[3]; |
1096 | struct gfs2_rgrpd *rgd; | |
5e2f7d61 BP |
1097 | int error; |
1098 | ||
1099 | error = gfs2_rindex_update(sdp); | |
1100 | if (error) | |
1101 | return error; | |
1102 | ||
1103 | error = -EROFS; | |
b3b94faa | 1104 | |
b3b94faa | 1105 | gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); |
ddee7608 | 1106 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); |
b3b94faa | 1107 | |
66fc061b | 1108 | rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr, 1); |
a365fbf3 | 1109 | if (!rgd) |
87654896 | 1110 | goto out_inodes; |
a365fbf3 | 1111 | |
ddee7608 RC |
1112 | gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2); |
1113 | ||
1114 | ||
8497a46e | 1115 | error = gfs2_glock_nq(ghs); /* parent */ |
b3b94faa | 1116 | if (error) |
8497a46e SW |
1117 | goto out_parent; |
1118 | ||
1119 | error = gfs2_glock_nq(ghs + 1); /* child */ | |
1120 | if (error) | |
1121 | goto out_child; | |
1122 | ||
d192a8e5 | 1123 | error = -ENOENT; |
855d23ce | 1124 | if (inode->i_nlink == 0) |
d192a8e5 SW |
1125 | goto out_rgrp; |
1126 | ||
855d23ce SW |
1127 | if (S_ISDIR(inode->i_mode)) { |
1128 | error = -ENOTEMPTY; | |
1129 | if (ip->i_entries > 2 || inode->i_nlink > 2) | |
1130 | goto out_rgrp; | |
1131 | } | |
1132 | ||
8497a46e SW |
1133 | error = gfs2_glock_nq(ghs + 2); /* rgrp */ |
1134 | if (error) | |
1135 | goto out_rgrp; | |
b3b94faa DT |
1136 | |
1137 | error = gfs2_unlink_ok(dip, &dentry->d_name, ip); | |
1138 | if (error) | |
72dbf479 | 1139 | goto out_gunlock; |
b3b94faa | 1140 | |
855d23ce | 1141 | error = gfs2_trans_begin(sdp, 2*RES_DINODE + 3*RES_LEAF + RES_RG_BIT, 0); |
855d23ce SW |
1142 | if (error) |
1143 | goto out_end_trans; | |
b3b94faa | 1144 | |
4327a9bf | 1145 | error = gfs2_unlink_inode(dip, dentry); |
b3b94faa | 1146 | |
feaa7bba SW |
1147 | out_end_trans: |
1148 | gfs2_trans_end(sdp); | |
72dbf479 | 1149 | out_gunlock: |
8497a46e SW |
1150 | gfs2_glock_dq(ghs + 2); |
1151 | out_rgrp: | |
8497a46e SW |
1152 | gfs2_glock_dq(ghs + 1); |
1153 | out_child: | |
8497a46e SW |
1154 | gfs2_glock_dq(ghs); |
1155 | out_parent: | |
87654896 SW |
1156 | gfs2_holder_uninit(ghs + 2); |
1157 | out_inodes: | |
1158 | gfs2_holder_uninit(ghs + 1); | |
8497a46e | 1159 | gfs2_holder_uninit(ghs); |
b3b94faa DT |
1160 | return error; |
1161 | } | |
1162 | ||
1163 | /** | |
1164 | * gfs2_symlink - Create a symlink | |
1165 | * @dir: The directory to create the symlink in | |
1166 | * @dentry: The dentry to put the symlink in | |
1167 | * @symname: The thing which the link points to | |
1168 | * | |
1169 | * Returns: errno | |
1170 | */ | |
1171 | ||
1172 | static int gfs2_symlink(struct inode *dir, struct dentry *dentry, | |
1173 | const char *symname) | |
1174 | { | |
feaa7bba | 1175 | struct gfs2_sbd *sdp = GFS2_SB(dir); |
160b4026 | 1176 | unsigned int size; |
b3b94faa | 1177 | |
b3b94faa DT |
1178 | size = strlen(symname); |
1179 | if (size > sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode) - 1) | |
1180 | return -ENAMETOOLONG; | |
1181 | ||
6d4ade98 | 1182 | return gfs2_create_inode(dir, dentry, NULL, S_IFLNK | S_IRWXUGO, 0, symname, size, 0, NULL); |
b3b94faa DT |
1183 | } |
1184 | ||
1185 | /** | |
1186 | * gfs2_mkdir - Make a directory | |
1187 | * @dir: The parent directory of the new one | |
1188 | * @dentry: The dentry of the new directory | |
1189 | * @mode: The mode of the new directory | |
1190 | * | |
1191 | * Returns: errno | |
1192 | */ | |
1193 | ||
18bb1db3 | 1194 | static int gfs2_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) |
b3b94faa | 1195 | { |
28fb3027 SW |
1196 | struct gfs2_sbd *sdp = GFS2_SB(dir); |
1197 | unsigned dsize = sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode); | |
6d4ade98 | 1198 | return gfs2_create_inode(dir, dentry, NULL, S_IFDIR | mode, 0, NULL, dsize, 0, NULL); |
b3b94faa DT |
1199 | } |
1200 | ||
b3b94faa DT |
1201 | /** |
1202 | * gfs2_mknod - Make a special file | |
1203 | * @dir: The directory in which the special file will reside | |
1204 | * @dentry: The dentry of the special file | |
1205 | * @mode: The mode of the special file | |
f2741d98 | 1206 | * @dev: The device specification of the special file |
b3b94faa DT |
1207 | * |
1208 | */ | |
1209 | ||
1a67aafb | 1210 | static int gfs2_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, |
b3b94faa DT |
1211 | dev_t dev) |
1212 | { | |
6d4ade98 SW |
1213 | return gfs2_create_inode(dir, dentry, NULL, mode, dev, NULL, 0, 0, NULL); |
1214 | } | |
1215 | ||
1216 | /** | |
1217 | * gfs2_atomic_open - Atomically open a file | |
1218 | * @dir: The directory | |
1219 | * @dentry: The proposed new entry | |
1220 | * @file: The proposed new struct file | |
1221 | * @flags: open flags | |
1222 | * @mode: File mode | |
1223 | * @opened: Flag to say whether the file has been opened or not | |
1224 | * | |
1225 | * Returns: error code or 0 for success | |
1226 | */ | |
1227 | ||
1228 | static int gfs2_atomic_open(struct inode *dir, struct dentry *dentry, | |
86fbca49 AO |
1229 | struct file *file, unsigned flags, |
1230 | umode_t mode, int *opened) | |
6d4ade98 SW |
1231 | { |
1232 | struct dentry *d; | |
1233 | bool excl = !!(flags & O_EXCL); | |
1234 | ||
00699ad8 | 1235 | if (!d_in_lookup(dentry)) |
4d93bc3e AV |
1236 | goto skip_lookup; |
1237 | ||
6d4ade98 SW |
1238 | d = __gfs2_lookup(dir, dentry, file, opened); |
1239 | if (IS_ERR(d)) | |
1240 | return PTR_ERR(d); | |
5ca1db41 MS |
1241 | if (d != NULL) |
1242 | dentry = d; | |
2b0143b5 | 1243 | if (d_really_is_positive(dentry)) { |
ec7d879c AV |
1244 | if (!(*opened & FILE_OPENED)) |
1245 | return finish_no_open(file, d); | |
5ca1db41 | 1246 | dput(d); |
6d4ade98 SW |
1247 | return 0; |
1248 | } | |
1249 | ||
5ca1db41 | 1250 | BUG_ON(d != NULL); |
4d93bc3e AV |
1251 | |
1252 | skip_lookup: | |
6d4ade98 SW |
1253 | if (!(flags & O_CREAT)) |
1254 | return -ENOENT; | |
1255 | ||
1256 | return gfs2_create_inode(dir, dentry, file, S_IFREG | mode, 0, NULL, 0, excl, opened); | |
b3b94faa DT |
1257 | } |
1258 | ||
0188d6c5 SW |
1259 | /* |
1260 | * gfs2_ok_to_move - check if it's ok to move a directory to another directory | |
1261 | * @this: move this | |
1262 | * @to: to here | |
1263 | * | |
1264 | * Follow @to back to the root and make sure we don't encounter @this | |
1265 | * Assumes we already hold the rename lock. | |
1266 | * | |
1267 | * Returns: errno | |
1268 | */ | |
1269 | ||
1270 | static int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to) | |
1271 | { | |
1272 | struct inode *dir = &to->i_inode; | |
1273 | struct super_block *sb = dir->i_sb; | |
1274 | struct inode *tmp; | |
0188d6c5 SW |
1275 | int error = 0; |
1276 | ||
0188d6c5 SW |
1277 | igrab(dir); |
1278 | ||
1279 | for (;;) { | |
1280 | if (dir == &this->i_inode) { | |
1281 | error = -EINVAL; | |
1282 | break; | |
1283 | } | |
2b0143b5 | 1284 | if (dir == d_inode(sb->s_root)) { |
0188d6c5 SW |
1285 | error = 0; |
1286 | break; | |
1287 | } | |
1288 | ||
8d123585 | 1289 | tmp = gfs2_lookupi(dir, &gfs2_qdotdot, 1); |
48f8f711 AD |
1290 | if (!tmp) { |
1291 | error = -ENOENT; | |
1292 | break; | |
1293 | } | |
0188d6c5 SW |
1294 | if (IS_ERR(tmp)) { |
1295 | error = PTR_ERR(tmp); | |
1296 | break; | |
1297 | } | |
1298 | ||
1299 | iput(dir); | |
1300 | dir = tmp; | |
1301 | } | |
1302 | ||
1303 | iput(dir); | |
1304 | ||
1305 | return error; | |
1306 | } | |
1307 | ||
a63b7bbc BM |
1308 | /** |
1309 | * update_moved_ino - Update an inode that's being moved | |
1310 | * @ip: The inode being moved | |
1311 | * @ndip: The parent directory of the new filename | |
1312 | * @dir_rename: True of ip is a directory | |
1313 | * | |
1314 | * Returns: errno | |
1315 | */ | |
1316 | ||
1317 | static int update_moved_ino(struct gfs2_inode *ip, struct gfs2_inode *ndip, | |
1318 | int dir_rename) | |
1319 | { | |
1320 | int error; | |
1321 | struct buffer_head *dibh; | |
1322 | ||
1323 | if (dir_rename) | |
1324 | return gfs2_dir_mvino(ip, &gfs2_qdotdot, ndip, DT_DIR); | |
1325 | ||
1326 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1327 | if (error) | |
1328 | return error; | |
1329 | ip->i_inode.i_ctime = CURRENT_TIME; | |
1330 | gfs2_trans_add_meta(ip->i_gl, dibh); | |
1331 | gfs2_dinode_out(ip, dibh->b_data); | |
1332 | brelse(dibh); | |
1333 | return 0; | |
1334 | } | |
1335 | ||
1336 | ||
b3b94faa DT |
1337 | /** |
1338 | * gfs2_rename - Rename a file | |
1339 | * @odir: Parent directory of old file name | |
1340 | * @odentry: The old dentry of the file | |
1341 | * @ndir: Parent directory of new file name | |
1342 | * @ndentry: The new dentry of the file | |
1343 | * | |
1344 | * Returns: errno | |
1345 | */ | |
1346 | ||
1347 | static int gfs2_rename(struct inode *odir, struct dentry *odentry, | |
1348 | struct inode *ndir, struct dentry *ndentry) | |
1349 | { | |
feaa7bba SW |
1350 | struct gfs2_inode *odip = GFS2_I(odir); |
1351 | struct gfs2_inode *ndip = GFS2_I(ndir); | |
2b0143b5 | 1352 | struct gfs2_inode *ip = GFS2_I(d_inode(odentry)); |
b3b94faa | 1353 | struct gfs2_inode *nip = NULL; |
feaa7bba | 1354 | struct gfs2_sbd *sdp = GFS2_SB(odir); |
6df9f9a2 | 1355 | struct gfs2_holder ghs[5], r_gh; |
ddee7608 | 1356 | struct gfs2_rgrpd *nrgd; |
b3b94faa DT |
1357 | unsigned int num_gh; |
1358 | int dir_rename = 0; | |
19aeb5a6 | 1359 | struct gfs2_diradd da = { .nr_blocks = 0, .save_loc = 0, }; |
b3b94faa DT |
1360 | unsigned int x; |
1361 | int error; | |
1362 | ||
6df9f9a2 | 1363 | gfs2_holder_mark_uninitialized(&r_gh); |
2b0143b5 DH |
1364 | if (d_really_is_positive(ndentry)) { |
1365 | nip = GFS2_I(d_inode(ndentry)); | |
b3b94faa DT |
1366 | if (ip == nip) |
1367 | return 0; | |
1368 | } | |
1369 | ||
5e2f7d61 BP |
1370 | error = gfs2_rindex_update(sdp); |
1371 | if (error) | |
1372 | return error; | |
1373 | ||
b54e9a0b | 1374 | error = gfs2_rsqa_alloc(ndip); |
0a305e49 BP |
1375 | if (error) |
1376 | return error; | |
1377 | ||
0188d6c5 SW |
1378 | if (odip != ndip) { |
1379 | error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE, | |
1380 | 0, &r_gh); | |
b3b94faa DT |
1381 | if (error) |
1382 | goto out; | |
1383 | ||
0188d6c5 SW |
1384 | if (S_ISDIR(ip->i_inode.i_mode)) { |
1385 | dir_rename = 1; | |
a63b7bbc | 1386 | /* don't move a directory into its subdir */ |
0188d6c5 SW |
1387 | error = gfs2_ok_to_move(ip, ndip); |
1388 | if (error) | |
1389 | goto out_gunlock_r; | |
1390 | } | |
b3b94faa DT |
1391 | } |
1392 | ||
d9d1ca30 | 1393 | num_gh = 1; |
b3b94faa | 1394 | gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); |
d9d1ca30 SW |
1395 | if (odip != ndip) { |
1396 | gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); | |
1397 | num_gh++; | |
1398 | } | |
1399 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); | |
1400 | num_gh++; | |
b3b94faa | 1401 | |
d9d1ca30 SW |
1402 | if (nip) { |
1403 | gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); | |
1404 | num_gh++; | |
ddee7608 RC |
1405 | /* grab the resource lock for unlink flag twiddling |
1406 | * this is the case of the target file already existing | |
1407 | * so we unlink before doing the rename | |
1408 | */ | |
66fc061b | 1409 | nrgd = gfs2_blk2rgrpd(sdp, nip->i_no_addr, 1); |
ddee7608 RC |
1410 | if (nrgd) |
1411 | gfs2_holder_init(nrgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh++); | |
d9d1ca30 | 1412 | } |
b3b94faa | 1413 | |
72dbf479 BP |
1414 | for (x = 0; x < num_gh; x++) { |
1415 | error = gfs2_glock_nq(ghs + x); | |
1416 | if (error) | |
1417 | goto out_gunlock; | |
1418 | } | |
b3b94faa | 1419 | |
d192a8e5 SW |
1420 | error = -ENOENT; |
1421 | if (ip->i_inode.i_nlink == 0) | |
1422 | goto out_gunlock; | |
1423 | ||
b3b94faa DT |
1424 | /* Check out the old directory */ |
1425 | ||
1426 | error = gfs2_unlink_ok(odip, &odentry->d_name, ip); | |
1427 | if (error) | |
1428 | goto out_gunlock; | |
1429 | ||
1430 | /* Check out the new directory */ | |
1431 | ||
1432 | if (nip) { | |
1433 | error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip); | |
1434 | if (error) | |
1435 | goto out_gunlock; | |
1436 | ||
d192a8e5 SW |
1437 | if (nip->i_inode.i_nlink == 0) { |
1438 | error = -EAGAIN; | |
1439 | goto out_gunlock; | |
1440 | } | |
1441 | ||
b60623c2 | 1442 | if (S_ISDIR(nip->i_inode.i_mode)) { |
ad6203f2 | 1443 | if (nip->i_entries < 2) { |
94fb763b | 1444 | gfs2_consist_inode(nip); |
b3b94faa DT |
1445 | error = -EIO; |
1446 | goto out_gunlock; | |
1447 | } | |
ad6203f2 | 1448 | if (nip->i_entries > 2) { |
b3b94faa DT |
1449 | error = -ENOTEMPTY; |
1450 | goto out_gunlock; | |
1451 | } | |
1452 | } | |
1453 | } else { | |
10556cb2 | 1454 | error = gfs2_permission(ndir, MAY_WRITE | MAY_EXEC); |
b3b94faa DT |
1455 | if (error) |
1456 | goto out_gunlock; | |
1457 | ||
dbb7cae2 | 1458 | error = gfs2_dir_check(ndir, &ndentry->d_name, NULL); |
b3b94faa DT |
1459 | switch (error) { |
1460 | case -ENOENT: | |
1461 | error = 0; | |
1462 | break; | |
1463 | case 0: | |
1464 | error = -EEXIST; | |
1465 | default: | |
1466 | goto out_gunlock; | |
1467 | }; | |
1468 | ||
1469 | if (odip != ndip) { | |
4f56110a | 1470 | if (!ndip->i_inode.i_nlink) { |
d192a8e5 | 1471 | error = -ENOENT; |
b3b94faa DT |
1472 | goto out_gunlock; |
1473 | } | |
ad6203f2 | 1474 | if (ndip->i_entries == (u32)-1) { |
b3b94faa DT |
1475 | error = -EFBIG; |
1476 | goto out_gunlock; | |
1477 | } | |
b60623c2 | 1478 | if (S_ISDIR(ip->i_inode.i_mode) && |
4f56110a | 1479 | ndip->i_inode.i_nlink == (u32)-1) { |
b3b94faa DT |
1480 | error = -EMLINK; |
1481 | goto out_gunlock; | |
1482 | } | |
1483 | } | |
1484 | } | |
1485 | ||
1486 | /* Check out the dir to be renamed */ | |
1487 | ||
1488 | if (dir_rename) { | |
2b0143b5 | 1489 | error = gfs2_permission(d_inode(odentry), MAY_WRITE); |
b3b94faa DT |
1490 | if (error) |
1491 | goto out_gunlock; | |
1492 | } | |
1493 | ||
3c1c0ae1 SW |
1494 | if (nip == NULL) { |
1495 | error = gfs2_diradd_alloc_required(ndir, &ndentry->d_name, &da); | |
1496 | if (error) | |
1497 | goto out_gunlock; | |
1498 | } | |
b3b94faa | 1499 | |
3c1c0ae1 SW |
1500 | if (da.nr_blocks) { |
1501 | struct gfs2_alloc_parms ap = { .target = da.nr_blocks, }; | |
b8fbf471 | 1502 | error = gfs2_quota_lock_check(ndip, &ap); |
b3b94faa | 1503 | if (error) |
5407e242 | 1504 | goto out_gunlock; |
b3b94faa | 1505 | |
7b9cff46 | 1506 | error = gfs2_inplace_reserve(ndip, &ap); |
b3b94faa DT |
1507 | if (error) |
1508 | goto out_gunlock_q; | |
1509 | ||
534cf9ca SW |
1510 | error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(ndip, &da, 4) + |
1511 | 4 * RES_LEAF + 4, 0); | |
b3b94faa DT |
1512 | if (error) |
1513 | goto out_ipreserv; | |
1514 | } else { | |
1515 | error = gfs2_trans_begin(sdp, 4 * RES_DINODE + | |
87d21e07 | 1516 | 5 * RES_LEAF + 4, 0); |
b3b94faa DT |
1517 | if (error) |
1518 | goto out_gunlock; | |
1519 | } | |
1520 | ||
1521 | /* Remove the target file, if it exists */ | |
1522 | ||
4327a9bf BP |
1523 | if (nip) |
1524 | error = gfs2_unlink_inode(ndip, ndentry); | |
b3b94faa | 1525 | |
a63b7bbc BM |
1526 | error = update_moved_ino(ip, ndip, dir_rename); |
1527 | if (error) | |
1528 | goto out_end_trans; | |
b3b94faa | 1529 | |
855d23ce | 1530 | error = gfs2_dir_del(odip, odentry); |
b3b94faa DT |
1531 | if (error) |
1532 | goto out_end_trans; | |
1533 | ||
2b47dad8 | 1534 | error = gfs2_dir_add(ndir, &ndentry->d_name, ip, &da); |
b3b94faa DT |
1535 | if (error) |
1536 | goto out_end_trans; | |
1537 | ||
feaa7bba | 1538 | out_end_trans: |
b3b94faa | 1539 | gfs2_trans_end(sdp); |
feaa7bba | 1540 | out_ipreserv: |
3c1c0ae1 | 1541 | if (da.nr_blocks) |
b3b94faa | 1542 | gfs2_inplace_release(ndip); |
feaa7bba | 1543 | out_gunlock_q: |
3c1c0ae1 | 1544 | if (da.nr_blocks) |
b3b94faa | 1545 | gfs2_quota_unlock(ndip); |
feaa7bba | 1546 | out_gunlock: |
2b47dad8 | 1547 | gfs2_dir_no_add(&da); |
72dbf479 BP |
1548 | while (x--) { |
1549 | gfs2_glock_dq(ghs + x); | |
b3b94faa | 1550 | gfs2_holder_uninit(ghs + x); |
72dbf479 | 1551 | } |
feaa7bba | 1552 | out_gunlock_r: |
6df9f9a2 | 1553 | if (gfs2_holder_initialized(&r_gh)) |
b3b94faa | 1554 | gfs2_glock_dq_uninit(&r_gh); |
feaa7bba | 1555 | out: |
b3b94faa DT |
1556 | return error; |
1557 | } | |
1558 | ||
a63b7bbc BM |
1559 | /** |
1560 | * gfs2_exchange - exchange two files | |
1561 | * @odir: Parent directory of old file name | |
1562 | * @odentry: The old dentry of the file | |
1563 | * @ndir: Parent directory of new file name | |
1564 | * @ndentry: The new dentry of the file | |
1565 | * @flags: The rename flags | |
1566 | * | |
1567 | * Returns: errno | |
1568 | */ | |
1569 | ||
1570 | static int gfs2_exchange(struct inode *odir, struct dentry *odentry, | |
1571 | struct inode *ndir, struct dentry *ndentry, | |
1572 | unsigned int flags) | |
1573 | { | |
1574 | struct gfs2_inode *odip = GFS2_I(odir); | |
1575 | struct gfs2_inode *ndip = GFS2_I(ndir); | |
1576 | struct gfs2_inode *oip = GFS2_I(odentry->d_inode); | |
1577 | struct gfs2_inode *nip = GFS2_I(ndentry->d_inode); | |
1578 | struct gfs2_sbd *sdp = GFS2_SB(odir); | |
6df9f9a2 | 1579 | struct gfs2_holder ghs[5], r_gh; |
a63b7bbc BM |
1580 | unsigned int num_gh; |
1581 | unsigned int x; | |
1582 | umode_t old_mode = oip->i_inode.i_mode; | |
1583 | umode_t new_mode = nip->i_inode.i_mode; | |
1584 | int error; | |
1585 | ||
6df9f9a2 | 1586 | gfs2_holder_mark_uninitialized(&r_gh); |
a63b7bbc BM |
1587 | error = gfs2_rindex_update(sdp); |
1588 | if (error) | |
1589 | return error; | |
1590 | ||
1591 | if (odip != ndip) { | |
1592 | error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE, | |
1593 | 0, &r_gh); | |
1594 | if (error) | |
1595 | goto out; | |
1596 | ||
1597 | if (S_ISDIR(old_mode)) { | |
1598 | /* don't move a directory into its subdir */ | |
1599 | error = gfs2_ok_to_move(oip, ndip); | |
1600 | if (error) | |
1601 | goto out_gunlock_r; | |
1602 | } | |
1603 | ||
1604 | if (S_ISDIR(new_mode)) { | |
1605 | /* don't move a directory into its subdir */ | |
1606 | error = gfs2_ok_to_move(nip, odip); | |
1607 | if (error) | |
1608 | goto out_gunlock_r; | |
1609 | } | |
1610 | } | |
1611 | ||
1612 | num_gh = 1; | |
1613 | gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); | |
1614 | if (odip != ndip) { | |
1615 | gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); | |
1616 | num_gh++; | |
1617 | } | |
1618 | gfs2_holder_init(oip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); | |
1619 | num_gh++; | |
1620 | ||
1621 | gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); | |
1622 | num_gh++; | |
1623 | ||
1624 | for (x = 0; x < num_gh; x++) { | |
1625 | error = gfs2_glock_nq(ghs + x); | |
1626 | if (error) | |
1627 | goto out_gunlock; | |
1628 | } | |
1629 | ||
1630 | error = -ENOENT; | |
1631 | if (oip->i_inode.i_nlink == 0 || nip->i_inode.i_nlink == 0) | |
1632 | goto out_gunlock; | |
1633 | ||
1634 | error = gfs2_unlink_ok(odip, &odentry->d_name, oip); | |
1635 | if (error) | |
1636 | goto out_gunlock; | |
1637 | error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip); | |
1638 | if (error) | |
1639 | goto out_gunlock; | |
1640 | ||
1641 | if (S_ISDIR(old_mode)) { | |
1642 | error = gfs2_permission(odentry->d_inode, MAY_WRITE); | |
1643 | if (error) | |
1644 | goto out_gunlock; | |
1645 | } | |
1646 | if (S_ISDIR(new_mode)) { | |
1647 | error = gfs2_permission(ndentry->d_inode, MAY_WRITE); | |
1648 | if (error) | |
1649 | goto out_gunlock; | |
1650 | } | |
1651 | error = gfs2_trans_begin(sdp, 4 * RES_DINODE + 4 * RES_LEAF, 0); | |
1652 | if (error) | |
1653 | goto out_gunlock; | |
1654 | ||
1655 | error = update_moved_ino(oip, ndip, S_ISDIR(old_mode)); | |
1656 | if (error) | |
1657 | goto out_end_trans; | |
1658 | ||
1659 | error = update_moved_ino(nip, odip, S_ISDIR(new_mode)); | |
1660 | if (error) | |
1661 | goto out_end_trans; | |
1662 | ||
1663 | error = gfs2_dir_mvino(ndip, &ndentry->d_name, oip, | |
1664 | IF2DT(old_mode)); | |
1665 | if (error) | |
1666 | goto out_end_trans; | |
1667 | ||
1668 | error = gfs2_dir_mvino(odip, &odentry->d_name, nip, | |
1669 | IF2DT(new_mode)); | |
1670 | if (error) | |
1671 | goto out_end_trans; | |
1672 | ||
1673 | if (odip != ndip) { | |
1674 | if (S_ISDIR(new_mode) && !S_ISDIR(old_mode)) { | |
1675 | inc_nlink(&odip->i_inode); | |
1676 | drop_nlink(&ndip->i_inode); | |
1677 | } else if (S_ISDIR(old_mode) && !S_ISDIR(new_mode)) { | |
1678 | inc_nlink(&ndip->i_inode); | |
1679 | drop_nlink(&odip->i_inode); | |
1680 | } | |
1681 | } | |
1682 | mark_inode_dirty(&ndip->i_inode); | |
1683 | if (odip != ndip) | |
1684 | mark_inode_dirty(&odip->i_inode); | |
1685 | ||
1686 | out_end_trans: | |
1687 | gfs2_trans_end(sdp); | |
1688 | out_gunlock: | |
1689 | while (x--) { | |
1690 | gfs2_glock_dq(ghs + x); | |
1691 | gfs2_holder_uninit(ghs + x); | |
1692 | } | |
1693 | out_gunlock_r: | |
6df9f9a2 | 1694 | if (gfs2_holder_initialized(&r_gh)) |
a63b7bbc BM |
1695 | gfs2_glock_dq_uninit(&r_gh); |
1696 | out: | |
1697 | return error; | |
1698 | } | |
1699 | ||
1700 | static int gfs2_rename2(struct inode *odir, struct dentry *odentry, | |
1701 | struct inode *ndir, struct dentry *ndentry, | |
1702 | unsigned int flags) | |
1703 | { | |
1704 | flags &= ~RENAME_NOREPLACE; | |
1705 | ||
1706 | if (flags & ~RENAME_EXCHANGE) | |
1707 | return -EINVAL; | |
1708 | ||
1709 | if (flags & RENAME_EXCHANGE) | |
1710 | return gfs2_exchange(odir, odentry, ndir, ndentry, flags); | |
1711 | ||
1712 | return gfs2_rename(odir, odentry, ndir, ndentry); | |
1713 | } | |
1714 | ||
536baf02 | 1715 | /** |
6b255391 | 1716 | * gfs2_get_link - Follow a symbolic link |
c177c2ac | 1717 | * @dentry: The dentry of the link |
6b255391 | 1718 | * @inode: The inode of the link |
fceef393 | 1719 | * @done: destructor for return value |
536baf02 | 1720 | * |
c177c2ac | 1721 | * This can handle symlinks of any size. |
536baf02 | 1722 | * |
c177c2ac | 1723 | * Returns: 0 on success or error code |
536baf02 SW |
1724 | */ |
1725 | ||
6b255391 | 1726 | static const char *gfs2_get_link(struct dentry *dentry, |
fceef393 AV |
1727 | struct inode *inode, |
1728 | struct delayed_call *done) | |
536baf02 | 1729 | { |
6b255391 | 1730 | struct gfs2_inode *ip = GFS2_I(inode); |
536baf02 SW |
1731 | struct gfs2_holder i_gh; |
1732 | struct buffer_head *dibh; | |
160b4026 | 1733 | unsigned int size; |
c177c2ac | 1734 | char *buf; |
536baf02 SW |
1735 | int error; |
1736 | ||
6b255391 AV |
1737 | if (!dentry) |
1738 | return ERR_PTR(-ECHILD); | |
1739 | ||
536baf02 SW |
1740 | gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh); |
1741 | error = gfs2_glock_nq(&i_gh); | |
1742 | if (error) { | |
1743 | gfs2_holder_uninit(&i_gh); | |
680baacb | 1744 | return ERR_PTR(error); |
536baf02 SW |
1745 | } |
1746 | ||
a2e0f799 SW |
1747 | size = (unsigned int)i_size_read(&ip->i_inode); |
1748 | if (size == 0) { | |
536baf02 | 1749 | gfs2_consist_inode(ip); |
c177c2ac | 1750 | buf = ERR_PTR(-EIO); |
536baf02 SW |
1751 | goto out; |
1752 | } | |
1753 | ||
1754 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
c177c2ac AV |
1755 | if (error) { |
1756 | buf = ERR_PTR(error); | |
536baf02 | 1757 | goto out; |
536baf02 SW |
1758 | } |
1759 | ||
160b4026 | 1760 | buf = kzalloc(size + 1, GFP_NOFS); |
c177c2ac AV |
1761 | if (!buf) |
1762 | buf = ERR_PTR(-ENOMEM); | |
1763 | else | |
160b4026 | 1764 | memcpy(buf, dibh->b_data + sizeof(struct gfs2_dinode), size); |
536baf02 SW |
1765 | brelse(dibh); |
1766 | out: | |
1767 | gfs2_glock_dq_uninit(&i_gh); | |
680baacb | 1768 | if (!IS_ERR(buf)) |
fceef393 | 1769 | set_delayed_call(done, kfree_link, buf); |
680baacb | 1770 | return buf; |
b3b94faa DT |
1771 | } |
1772 | ||
b3b94faa DT |
1773 | /** |
1774 | * gfs2_permission - | |
75d5cfbe SW |
1775 | * @inode: The inode |
1776 | * @mask: The mask to be tested | |
1777 | * @flags: Indicates whether this is an RCU path walk or not | |
b3b94faa | 1778 | * |
300c7d75 SW |
1779 | * This may be called from the VFS directly, or from within GFS2 with the |
1780 | * inode locked, so we look to see if the glock is already locked and only | |
1781 | * lock the glock if its not already been done. | |
1782 | * | |
b3b94faa DT |
1783 | * Returns: errno |
1784 | */ | |
1785 | ||
10556cb2 | 1786 | int gfs2_permission(struct inode *inode, int mask) |
b3b94faa | 1787 | { |
b74c79e9 | 1788 | struct gfs2_inode *ip; |
b3b94faa DT |
1789 | struct gfs2_holder i_gh; |
1790 | int error; | |
b74c79e9 | 1791 | |
6df9f9a2 | 1792 | gfs2_holder_mark_uninitialized(&i_gh); |
b74c79e9 | 1793 | ip = GFS2_I(inode); |
7afd88d9 | 1794 | if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) { |
2e60d768 BM |
1795 | if (mask & MAY_NOT_BLOCK) |
1796 | return -ECHILD; | |
1797 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh); | |
1798 | if (error) | |
1799 | return error; | |
300c7d75 | 1800 | } |
b3b94faa | 1801 | |
f58ba889 | 1802 | if ((mask & MAY_WRITE) && IS_IMMUTABLE(inode)) |
337684a1 | 1803 | error = -EPERM; |
f58ba889 | 1804 | else |
2830ba7f | 1805 | error = generic_permission(inode, mask); |
6df9f9a2 | 1806 | if (gfs2_holder_initialized(&i_gh)) |
b3b94faa | 1807 | gfs2_glock_dq_uninit(&i_gh); |
b3b94faa DT |
1808 | |
1809 | return error; | |
1810 | } | |
1811 | ||
ab9bbda0 | 1812 | static int __gfs2_setattr_simple(struct inode *inode, struct iattr *attr) |
194c011f | 1813 | { |
194c011f SW |
1814 | setattr_copy(inode, attr); |
1815 | mark_inode_dirty(inode); | |
194c011f SW |
1816 | return 0; |
1817 | } | |
1818 | ||
1819 | /** | |
1820 | * gfs2_setattr_simple - | |
1821 | * @ip: | |
1822 | * @attr: | |
1823 | * | |
1824 | * Returns: errno | |
1825 | */ | |
1826 | ||
ab9bbda0 | 1827 | int gfs2_setattr_simple(struct inode *inode, struct iattr *attr) |
194c011f SW |
1828 | { |
1829 | int error; | |
1830 | ||
1831 | if (current->journal_info) | |
ab9bbda0 | 1832 | return __gfs2_setattr_simple(inode, attr); |
194c011f | 1833 | |
ab9bbda0 | 1834 | error = gfs2_trans_begin(GFS2_SB(inode), RES_DINODE, 0); |
194c011f SW |
1835 | if (error) |
1836 | return error; | |
1837 | ||
ab9bbda0 SW |
1838 | error = __gfs2_setattr_simple(inode, attr); |
1839 | gfs2_trans_end(GFS2_SB(inode)); | |
194c011f SW |
1840 | return error; |
1841 | } | |
1842 | ||
b3b94faa DT |
1843 | static int setattr_chown(struct inode *inode, struct iattr *attr) |
1844 | { | |
feaa7bba SW |
1845 | struct gfs2_inode *ip = GFS2_I(inode); |
1846 | struct gfs2_sbd *sdp = GFS2_SB(inode); | |
7c06b5d6 EB |
1847 | kuid_t ouid, nuid; |
1848 | kgid_t ogid, ngid; | |
b3b94faa | 1849 | int error; |
b8fbf471 | 1850 | struct gfs2_alloc_parms ap; |
b3b94faa | 1851 | |
2933f925 SW |
1852 | ouid = inode->i_uid; |
1853 | ogid = inode->i_gid; | |
b3b94faa DT |
1854 | nuid = attr->ia_uid; |
1855 | ngid = attr->ia_gid; | |
1856 | ||
6b24c0d2 | 1857 | if (!(attr->ia_valid & ATTR_UID) || uid_eq(ouid, nuid)) |
f4108a60 | 1858 | ouid = nuid = NO_UID_QUOTA_CHANGE; |
6b24c0d2 | 1859 | if (!(attr->ia_valid & ATTR_GID) || gid_eq(ogid, ngid)) |
f4108a60 | 1860 | ogid = ngid = NO_GID_QUOTA_CHANGE; |
b3b94faa | 1861 | |
b54e9a0b | 1862 | error = gfs2_rsqa_alloc(ip); |
62e96cf8 BP |
1863 | if (error) |
1864 | goto out; | |
1865 | ||
1866 | error = gfs2_rindex_update(sdp); | |
1867 | if (error) | |
1868 | goto out; | |
1869 | ||
1870 | error = gfs2_quota_lock(ip, nuid, ngid); | |
1871 | if (error) | |
1872 | goto out; | |
1873 | ||
b8fbf471 AD |
1874 | ap.target = gfs2_get_inode_blocks(&ip->i_inode); |
1875 | ||
6b24c0d2 EB |
1876 | if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) || |
1877 | !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) { | |
b8fbf471 | 1878 | error = gfs2_quota_check(ip, nuid, ngid, &ap); |
b3b94faa DT |
1879 | if (error) |
1880 | goto out_gunlock_q; | |
1881 | } | |
1882 | ||
1883 | error = gfs2_trans_begin(sdp, RES_DINODE + 2 * RES_QUOTA, 0); | |
1884 | if (error) | |
1885 | goto out_gunlock_q; | |
1886 | ||
ab9bbda0 | 1887 | error = gfs2_setattr_simple(inode, attr); |
b3b94faa DT |
1888 | if (error) |
1889 | goto out_end_trans; | |
1890 | ||
6b24c0d2 EB |
1891 | if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) || |
1892 | !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) { | |
39a72580 | 1893 | gfs2_quota_change(ip, -(s64)ap.target, ouid, ogid); |
b8fbf471 | 1894 | gfs2_quota_change(ip, ap.target, nuid, ngid); |
b3b94faa DT |
1895 | } |
1896 | ||
a91ea69f | 1897 | out_end_trans: |
b3b94faa | 1898 | gfs2_trans_end(sdp); |
a91ea69f | 1899 | out_gunlock_q: |
b3b94faa | 1900 | gfs2_quota_unlock(ip); |
62e96cf8 | 1901 | out: |
b3b94faa DT |
1902 | return error; |
1903 | } | |
1904 | ||
1905 | /** | |
1906 | * gfs2_setattr - Change attributes on an inode | |
1907 | * @dentry: The dentry which is changing | |
1908 | * @attr: The structure describing the change | |
1909 | * | |
1910 | * The VFS layer wants to change one or more of an inodes attributes. Write | |
1911 | * that change out to disk. | |
1912 | * | |
1913 | * Returns: errno | |
1914 | */ | |
1915 | ||
1916 | static int gfs2_setattr(struct dentry *dentry, struct iattr *attr) | |
1917 | { | |
2b0143b5 | 1918 | struct inode *inode = d_inode(dentry); |
feaa7bba | 1919 | struct gfs2_inode *ip = GFS2_I(inode); |
b3b94faa DT |
1920 | struct gfs2_holder i_gh; |
1921 | int error; | |
1922 | ||
b54e9a0b | 1923 | error = gfs2_rsqa_alloc(ip); |
0a305e49 BP |
1924 | if (error) |
1925 | return error; | |
1926 | ||
b3b94faa DT |
1927 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); |
1928 | if (error) | |
1929 | return error; | |
1930 | ||
1931 | error = -EPERM; | |
1932 | if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) | |
1933 | goto out; | |
1934 | ||
1935 | error = inode_change_ok(inode, attr); | |
1936 | if (error) | |
1937 | goto out; | |
1938 | ||
1939 | if (attr->ia_valid & ATTR_SIZE) | |
ff8f33c8 | 1940 | error = gfs2_setattr_size(inode, attr->ia_size); |
b3b94faa DT |
1941 | else if (attr->ia_valid & (ATTR_UID | ATTR_GID)) |
1942 | error = setattr_chown(inode, attr); | |
e01580bf | 1943 | else { |
ab9bbda0 | 1944 | error = gfs2_setattr_simple(inode, attr); |
e01580bf CH |
1945 | if (!error && attr->ia_valid & ATTR_MODE) |
1946 | error = posix_acl_chmod(inode, inode->i_mode); | |
1947 | } | |
b3b94faa | 1948 | |
a91ea69f | 1949 | out: |
b3b94faa DT |
1950 | if (!error) |
1951 | mark_inode_dirty(inode); | |
ab9bbda0 | 1952 | gfs2_glock_dq_uninit(&i_gh); |
b3b94faa DT |
1953 | return error; |
1954 | } | |
1955 | ||
1956 | /** | |
1957 | * gfs2_getattr - Read out an inode's attributes | |
26c1a574 | 1958 | * @mnt: The vfsmount the inode is being accessed from |
b3b94faa DT |
1959 | * @dentry: The dentry to stat |
1960 | * @stat: The inode's stats | |
1961 | * | |
dcf3dd85 SW |
1962 | * This may be called from the VFS directly, or from within GFS2 with the |
1963 | * inode locked, so we look to see if the glock is already locked and only | |
1964 | * lock the glock if its not already been done. Note that its the NFS | |
1965 | * readdirplus operation which causes this to be called (from filldir) | |
1966 | * with the glock already held. | |
1967 | * | |
b3b94faa DT |
1968 | * Returns: errno |
1969 | */ | |
1970 | ||
1971 | static int gfs2_getattr(struct vfsmount *mnt, struct dentry *dentry, | |
1972 | struct kstat *stat) | |
1973 | { | |
2b0143b5 | 1974 | struct inode *inode = d_inode(dentry); |
feaa7bba | 1975 | struct gfs2_inode *ip = GFS2_I(inode); |
b3b94faa DT |
1976 | struct gfs2_holder gh; |
1977 | int error; | |
1978 | ||
6df9f9a2 | 1979 | gfs2_holder_mark_uninitialized(&gh); |
7afd88d9 | 1980 | if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) { |
2e60d768 BM |
1981 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); |
1982 | if (error) | |
1983 | return error; | |
b3b94faa DT |
1984 | } |
1985 | ||
dcf3dd85 | 1986 | generic_fillattr(inode, stat); |
6df9f9a2 | 1987 | if (gfs2_holder_initialized(&gh)) |
dcf3dd85 SW |
1988 | gfs2_glock_dq_uninit(&gh); |
1989 | ||
1990 | return 0; | |
b3b94faa DT |
1991 | } |
1992 | ||
e9079cce SW |
1993 | static int gfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, |
1994 | u64 start, u64 len) | |
1995 | { | |
1996 | struct gfs2_inode *ip = GFS2_I(inode); | |
1997 | struct gfs2_holder gh; | |
1998 | int ret; | |
1999 | ||
2000 | ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC); | |
2001 | if (ret) | |
2002 | return ret; | |
2003 | ||
5955102c | 2004 | inode_lock(inode); |
e9079cce SW |
2005 | |
2006 | ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh); | |
2007 | if (ret) | |
2008 | goto out; | |
2009 | ||
2010 | if (gfs2_is_stuffed(ip)) { | |
2011 | u64 phys = ip->i_no_addr << inode->i_blkbits; | |
2012 | u64 size = i_size_read(inode); | |
2013 | u32 flags = FIEMAP_EXTENT_LAST|FIEMAP_EXTENT_NOT_ALIGNED| | |
2014 | FIEMAP_EXTENT_DATA_INLINE; | |
2015 | phys += sizeof(struct gfs2_dinode); | |
2016 | phys += start; | |
2017 | if (start + len > size) | |
2018 | len = size - start; | |
2019 | if (start < size) | |
2020 | ret = fiemap_fill_next_extent(fieinfo, start, phys, | |
2021 | len, flags); | |
2022 | if (ret == 1) | |
2023 | ret = 0; | |
2024 | } else { | |
2025 | ret = __generic_block_fiemap(inode, fieinfo, start, len, | |
2026 | gfs2_block_map); | |
2027 | } | |
2028 | ||
2029 | gfs2_glock_dq_uninit(&gh); | |
2030 | out: | |
5955102c | 2031 | inode_unlock(inode); |
e9079cce SW |
2032 | return ret; |
2033 | } | |
2034 | ||
92e1d5be | 2035 | const struct inode_operations gfs2_file_iops = { |
e6305c43 | 2036 | .permission = gfs2_permission, |
b3b94faa DT |
2037 | .setattr = gfs2_setattr, |
2038 | .getattr = gfs2_getattr, | |
1a39ba99 AV |
2039 | .setxattr = generic_setxattr, |
2040 | .getxattr = generic_getxattr, | |
b3b94faa | 2041 | .listxattr = gfs2_listxattr, |
1a39ba99 | 2042 | .removexattr = generic_removexattr, |
e9079cce | 2043 | .fiemap = gfs2_fiemap, |
4e34e719 | 2044 | .get_acl = gfs2_get_acl, |
e01580bf | 2045 | .set_acl = gfs2_set_acl, |
b3b94faa DT |
2046 | }; |
2047 | ||
92e1d5be | 2048 | const struct inode_operations gfs2_dir_iops = { |
b3b94faa DT |
2049 | .create = gfs2_create, |
2050 | .lookup = gfs2_lookup, | |
2051 | .link = gfs2_link, | |
2052 | .unlink = gfs2_unlink, | |
2053 | .symlink = gfs2_symlink, | |
2054 | .mkdir = gfs2_mkdir, | |
855d23ce | 2055 | .rmdir = gfs2_unlink, |
b3b94faa | 2056 | .mknod = gfs2_mknod, |
a63b7bbc | 2057 | .rename2 = gfs2_rename2, |
e6305c43 | 2058 | .permission = gfs2_permission, |
b3b94faa DT |
2059 | .setattr = gfs2_setattr, |
2060 | .getattr = gfs2_getattr, | |
1a39ba99 AV |
2061 | .setxattr = generic_setxattr, |
2062 | .getxattr = generic_getxattr, | |
b3b94faa | 2063 | .listxattr = gfs2_listxattr, |
1a39ba99 | 2064 | .removexattr = generic_removexattr, |
e9079cce | 2065 | .fiemap = gfs2_fiemap, |
4e34e719 | 2066 | .get_acl = gfs2_get_acl, |
e01580bf | 2067 | .set_acl = gfs2_set_acl, |
6d4ade98 | 2068 | .atomic_open = gfs2_atomic_open, |
b3b94faa DT |
2069 | }; |
2070 | ||
92e1d5be | 2071 | const struct inode_operations gfs2_symlink_iops = { |
c177c2ac | 2072 | .readlink = generic_readlink, |
6b255391 | 2073 | .get_link = gfs2_get_link, |
e6305c43 | 2074 | .permission = gfs2_permission, |
b3b94faa DT |
2075 | .setattr = gfs2_setattr, |
2076 | .getattr = gfs2_getattr, | |
1a39ba99 AV |
2077 | .setxattr = generic_setxattr, |
2078 | .getxattr = generic_getxattr, | |
b3b94faa | 2079 | .listxattr = gfs2_listxattr, |
1a39ba99 | 2080 | .removexattr = generic_removexattr, |
e9079cce | 2081 | .fiemap = gfs2_fiemap, |
b3b94faa DT |
2082 | }; |
2083 |