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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 | 15 | #include <linux/mm.h> |
5b825c3a | 16 | #include <linux/cred.h> |
b3b94faa DT |
17 | #include <linux/xattr.h> |
18 | #include <linux/posix_acl.h> | |
5c676f6d | 19 | #include <linux/gfs2_ondisk.h> |
71b86f56 | 20 | #include <linux/crc32.h> |
aac1a55b | 21 | #include <linux/iomap.h> |
194c011f | 22 | #include <linux/security.h> |
7c0f6ba6 | 23 | #include <linux/uaccess.h> |
b3b94faa DT |
24 | |
25 | #include "gfs2.h" | |
5c676f6d | 26 | #include "incore.h" |
b3b94faa DT |
27 | #include "acl.h" |
28 | #include "bmap.h" | |
29 | #include "dir.h" | |
307cf6e6 | 30 | #include "xattr.h" |
b3b94faa DT |
31 | #include "glock.h" |
32 | #include "inode.h" | |
33 | #include "meta_io.h" | |
b3b94faa DT |
34 | #include "quota.h" |
35 | #include "rgrp.h" | |
36 | #include "trans.h" | |
5c676f6d | 37 | #include "util.h" |
b2760583 | 38 | #include "super.h" |
194c011f SW |
39 | #include "glops.h" |
40 | ||
cda9dd42 | 41 | static int iget_test(struct inode *inode, void *opaque) |
194c011f | 42 | { |
cda9dd42 AG |
43 | u64 no_addr = *(u64 *)opaque; |
44 | ||
45 | return GFS2_I(inode)->i_no_addr == no_addr; | |
46 | } | |
47 | ||
48 | static int iget_set(struct inode *inode, void *opaque) | |
49 | { | |
50 | u64 no_addr = *(u64 *)opaque; | |
51 | ||
52 | GFS2_I(inode)->i_no_addr = no_addr; | |
53 | inode->i_ino = no_addr; | |
54 | return 0; | |
55 | } | |
56 | ||
3ce37b2c AG |
57 | static struct inode *gfs2_iget(struct super_block *sb, u64 no_addr) |
58 | { | |
59 | struct inode *inode; | |
60 | ||
61 | repeat: | |
cda9dd42 | 62 | inode = iget5_locked(sb, no_addr, iget_test, iget_set, &no_addr); |
3ce37b2c AG |
63 | if (!inode) |
64 | return inode; | |
65 | if (is_bad_inode(inode)) { | |
66 | iput(inode); | |
67 | goto repeat; | |
68 | } | |
3ce37b2c | 69 | return inode; |
194c011f SW |
70 | } |
71 | ||
72 | /** | |
73 | * gfs2_set_iop - Sets inode operations | |
74 | * @inode: The inode with correct i_mode filled in | |
75 | * | |
76 | * GFS2 lookup code fills in vfs inode contents based on info obtained | |
77 | * from directory entry inside gfs2_inode_lookup(). | |
78 | */ | |
79 | ||
80 | static void gfs2_set_iop(struct inode *inode) | |
81 | { | |
82 | struct gfs2_sbd *sdp = GFS2_SB(inode); | |
83 | umode_t mode = inode->i_mode; | |
84 | ||
85 | if (S_ISREG(mode)) { | |
86 | inode->i_op = &gfs2_file_iops; | |
87 | if (gfs2_localflocks(sdp)) | |
88 | inode->i_fop = &gfs2_file_fops_nolock; | |
89 | else | |
90 | inode->i_fop = &gfs2_file_fops; | |
91 | } else if (S_ISDIR(mode)) { | |
92 | inode->i_op = &gfs2_dir_iops; | |
93 | if (gfs2_localflocks(sdp)) | |
94 | inode->i_fop = &gfs2_dir_fops_nolock; | |
95 | else | |
96 | inode->i_fop = &gfs2_dir_fops; | |
97 | } else if (S_ISLNK(mode)) { | |
98 | inode->i_op = &gfs2_symlink_iops; | |
99 | } else { | |
100 | inode->i_op = &gfs2_file_iops; | |
101 | init_special_inode(inode, inode->i_mode, inode->i_rdev); | |
102 | } | |
103 | } | |
104 | ||
105 | /** | |
106 | * gfs2_inode_lookup - Lookup an inode | |
107 | * @sb: The super block | |
194c011f | 108 | * @type: The type of the inode |
3ce37b2c AG |
109 | * @no_addr: The inode number |
110 | * @no_formal_ino: The inode generation number | |
111 | * @blktype: Requested block type (GFS2_BLKST_DINODE or GFS2_BLKST_UNLINKED; | |
61b91cfd | 112 | * GFS2_BLKST_FREE to indicate not to verify) |
3ce37b2c AG |
113 | * |
114 | * If @type is DT_UNKNOWN, the inode type is fetched from disk. | |
115 | * | |
116 | * If @blktype is anything other than GFS2_BLKST_FREE (which is used as a | |
117 | * placeholder because it doesn't otherwise make sense), the on-disk block type | |
118 | * is verified to be @blktype. | |
194c011f SW |
119 | * |
120 | * Returns: A VFS inode, or an error | |
121 | */ | |
122 | ||
123 | struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned int type, | |
3ce37b2c AG |
124 | u64 no_addr, u64 no_formal_ino, |
125 | unsigned int blktype) | |
194c011f SW |
126 | { |
127 | struct inode *inode; | |
128 | struct gfs2_inode *ip; | |
129 | struct gfs2_glock *io_gl = NULL; | |
3ce37b2c | 130 | struct gfs2_holder i_gh; |
194c011f SW |
131 | int error; |
132 | ||
6df9f9a2 | 133 | gfs2_holder_mark_uninitialized(&i_gh); |
3ce37b2c | 134 | inode = gfs2_iget(sb, no_addr); |
194c011f | 135 | if (!inode) |
ac3beb6a | 136 | return ERR_PTR(-ENOMEM); |
194c011f | 137 | |
e97321fa | 138 | ip = GFS2_I(inode); |
e97321fa | 139 | |
194c011f SW |
140 | if (inode->i_state & I_NEW) { |
141 | struct gfs2_sbd *sdp = GFS2_SB(inode); | |
142 | ip->i_no_formal_ino = no_formal_ino; | |
143 | ||
144 | error = gfs2_glock_get(sdp, no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl); | |
145 | if (unlikely(error)) | |
146 | goto fail; | |
4fd1a579 | 147 | flush_delayed_work(&ip->i_gl->gl_work); |
194c011f SW |
148 | |
149 | error = gfs2_glock_get(sdp, no_addr, &gfs2_iopen_glops, CREATE, &io_gl); | |
150 | if (unlikely(error)) | |
151 | goto fail_put; | |
152 | ||
3ce37b2c AG |
153 | if (type == DT_UNKNOWN || blktype != GFS2_BLKST_FREE) { |
154 | /* | |
155 | * The GL_SKIP flag indicates to skip reading the inode | |
156 | * block. We read the inode with gfs2_inode_refresh | |
157 | * after possibly checking the block type. | |
158 | */ | |
159 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, | |
160 | GL_SKIP, &i_gh); | |
161 | if (error) | |
162 | goto fail_put; | |
3ce37b2c AG |
163 | |
164 | if (blktype != GFS2_BLKST_FREE) { | |
165 | error = gfs2_check_blk_type(sdp, no_addr, | |
166 | blktype); | |
167 | if (error) | |
168 | goto fail_put; | |
169 | } | |
170 | } | |
171 | ||
4d7c18c7 | 172 | glock_set_object(ip->i_gl, ip); |
194c011f SW |
173 | set_bit(GIF_INVALID, &ip->i_flags); |
174 | error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh); | |
175 | if (unlikely(error)) | |
3ce37b2c | 176 | goto fail_put; |
4fd1a579 | 177 | glock_set_object(ip->i_iopen_gh.gh_gl, ip); |
194c011f SW |
178 | gfs2_glock_put(io_gl); |
179 | io_gl = NULL; | |
180 | ||
181 | if (type == DT_UNKNOWN) { | |
182 | /* Inode glock must be locked already */ | |
183 | error = gfs2_inode_refresh(GFS2_I(inode)); | |
184 | if (error) | |
185 | goto fail_refresh; | |
186 | } else { | |
187 | inode->i_mode = DT2IF(type); | |
188 | } | |
189 | ||
190 | gfs2_set_iop(inode); | |
332f51d7 | 191 | |
38eedf28 AG |
192 | /* Lowest possible timestamp; will be overwritten in gfs2_dinode_in. */ |
193 | inode->i_atime.tv_sec = 1LL << (8 * sizeof(inode->i_atime.tv_sec) - 1); | |
332f51d7 AG |
194 | inode->i_atime.tv_nsec = 0; |
195 | ||
194c011f SW |
196 | unlock_new_inode(inode); |
197 | } | |
198 | ||
6df9f9a2 | 199 | if (gfs2_holder_initialized(&i_gh)) |
3ce37b2c | 200 | gfs2_glock_dq_uninit(&i_gh); |
194c011f SW |
201 | return inode; |
202 | ||
203 | fail_refresh: | |
a6a4d98b | 204 | ip->i_iopen_gh.gh_flags |= GL_NOCACHE; |
df3d87bd | 205 | glock_clear_object(ip->i_iopen_gh.gh_gl, ip); |
d4da3198 | 206 | gfs2_glock_dq_uninit(&ip->i_iopen_gh); |
3ce37b2c | 207 | fail_put: |
194c011f SW |
208 | if (io_gl) |
209 | gfs2_glock_put(io_gl); | |
4d7c18c7 | 210 | glock_clear_object(ip->i_gl, ip); |
6df9f9a2 | 211 | if (gfs2_holder_initialized(&i_gh)) |
3ce37b2c | 212 | gfs2_glock_dq_uninit(&i_gh); |
194c011f SW |
213 | fail: |
214 | iget_failed(inode); | |
215 | return ERR_PTR(error); | |
216 | } | |
217 | ||
218 | struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr, | |
219 | u64 *no_formal_ino, unsigned int blktype) | |
220 | { | |
221 | struct super_block *sb = sdp->sd_vfs; | |
3ce37b2c | 222 | struct inode *inode; |
194c011f SW |
223 | int error; |
224 | ||
3ce37b2c | 225 | inode = gfs2_inode_lookup(sb, DT_UNKNOWN, no_addr, 0, blktype); |
194c011f | 226 | if (IS_ERR(inode)) |
3ce37b2c | 227 | return inode; |
194c011f SW |
228 | |
229 | /* Two extra checks for NFS only */ | |
230 | if (no_formal_ino) { | |
231 | error = -ESTALE; | |
232 | if (GFS2_I(inode)->i_no_formal_ino != *no_formal_ino) | |
233 | goto fail_iput; | |
234 | ||
235 | error = -EIO; | |
236 | if (GFS2_I(inode)->i_diskflags & GFS2_DIF_SYSTEM) | |
237 | goto fail_iput; | |
194c011f | 238 | } |
3ce37b2c | 239 | return inode; |
194c011f | 240 | |
194c011f SW |
241 | fail_iput: |
242 | iput(inode); | |
3ce37b2c | 243 | return ERR_PTR(error); |
194c011f SW |
244 | } |
245 | ||
246 | ||
247 | struct inode *gfs2_lookup_simple(struct inode *dip, const char *name) | |
248 | { | |
249 | struct qstr qstr; | |
250 | struct inode *inode; | |
251 | gfs2_str2qstr(&qstr, name); | |
252 | inode = gfs2_lookupi(dip, &qstr, 1); | |
253 | /* gfs2_lookupi has inconsistent callers: vfs | |
254 | * related routines expect NULL for no entry found, | |
255 | * gfs2_lookup_simple callers expect ENOENT | |
256 | * and do not check for NULL. | |
257 | */ | |
258 | if (inode == NULL) | |
259 | return ERR_PTR(-ENOENT); | |
260 | else | |
261 | return inode; | |
262 | } | |
263 | ||
264 | ||
265 | /** | |
266 | * gfs2_lookupi - Look up a filename in a directory and return its inode | |
267 | * @d_gh: An initialized holder for the directory glock | |
268 | * @name: The name of the inode to look for | |
269 | * @is_root: If 1, ignore the caller's permissions | |
270 | * @i_gh: An uninitialized holder for the new inode glock | |
271 | * | |
272 | * This can be called via the VFS filldir function when NFS is doing | |
273 | * a readdirplus and the inode which its intending to stat isn't | |
274 | * already in cache. In this case we must not take the directory glock | |
275 | * again, since the readdir call will have already taken that lock. | |
276 | * | |
277 | * Returns: errno | |
278 | */ | |
279 | ||
280 | struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name, | |
281 | int is_root) | |
282 | { | |
283 | struct super_block *sb = dir->i_sb; | |
284 | struct gfs2_inode *dip = GFS2_I(dir); | |
285 | struct gfs2_holder d_gh; | |
286 | int error = 0; | |
287 | struct inode *inode = NULL; | |
194c011f | 288 | |
6df9f9a2 | 289 | gfs2_holder_mark_uninitialized(&d_gh); |
194c011f SW |
290 | if (!name->len || name->len > GFS2_FNAMESIZE) |
291 | return ERR_PTR(-ENAMETOOLONG); | |
292 | ||
293 | if ((name->len == 1 && memcmp(name->name, ".", 1) == 0) || | |
294 | (name->len == 2 && memcmp(name->name, "..", 2) == 0 && | |
2b0143b5 | 295 | dir == d_inode(sb->s_root))) { |
194c011f SW |
296 | igrab(dir); |
297 | return dir; | |
298 | } | |
299 | ||
300 | if (gfs2_glock_is_locked_by_me(dip->i_gl) == NULL) { | |
301 | error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh); | |
302 | if (error) | |
303 | return ERR_PTR(error); | |
194c011f SW |
304 | } |
305 | ||
306 | if (!is_root) { | |
10556cb2 | 307 | error = gfs2_permission(dir, MAY_EXEC); |
194c011f SW |
308 | if (error) |
309 | goto out; | |
310 | } | |
311 | ||
5a00f3cc | 312 | inode = gfs2_dir_search(dir, name, false); |
194c011f SW |
313 | if (IS_ERR(inode)) |
314 | error = PTR_ERR(inode); | |
315 | out: | |
6df9f9a2 | 316 | if (gfs2_holder_initialized(&d_gh)) |
194c011f SW |
317 | gfs2_glock_dq_uninit(&d_gh); |
318 | if (error == -ENOENT) | |
319 | return NULL; | |
320 | return inode ? inode : ERR_PTR(error); | |
321 | } | |
322 | ||
323 | /** | |
324 | * create_ok - OK to create a new on-disk inode here? | |
325 | * @dip: Directory in which dinode is to be created | |
326 | * @name: Name of new dinode | |
327 | * @mode: | |
328 | * | |
329 | * Returns: errno | |
330 | */ | |
331 | ||
332 | static int create_ok(struct gfs2_inode *dip, const struct qstr *name, | |
175a4eb7 | 333 | umode_t mode) |
194c011f SW |
334 | { |
335 | int error; | |
336 | ||
10556cb2 | 337 | error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC); |
194c011f SW |
338 | if (error) |
339 | return error; | |
340 | ||
341 | /* Don't create entries in an unlinked directory */ | |
342 | if (!dip->i_inode.i_nlink) | |
343 | return -ENOENT; | |
344 | ||
194c011f SW |
345 | if (dip->i_entries == (u32)-1) |
346 | return -EFBIG; | |
347 | if (S_ISDIR(mode) && dip->i_inode.i_nlink == (u32)-1) | |
348 | return -EMLINK; | |
349 | ||
350 | return 0; | |
351 | } | |
352 | ||
c9aecf73 SW |
353 | static void munge_mode_uid_gid(const struct gfs2_inode *dip, |
354 | struct inode *inode) | |
194c011f SW |
355 | { |
356 | if (GFS2_SB(&dip->i_inode)->sd_args.ar_suiddir && | |
6b24c0d2 EB |
357 | (dip->i_inode.i_mode & S_ISUID) && |
358 | !uid_eq(dip->i_inode.i_uid, GLOBAL_ROOT_UID)) { | |
c9aecf73 SW |
359 | if (S_ISDIR(inode->i_mode)) |
360 | inode->i_mode |= S_ISUID; | |
6b24c0d2 | 361 | else if (!uid_eq(dip->i_inode.i_uid, current_fsuid())) |
c9aecf73 SW |
362 | inode->i_mode &= ~07111; |
363 | inode->i_uid = dip->i_inode.i_uid; | |
194c011f | 364 | } else |
c9aecf73 | 365 | inode->i_uid = current_fsuid(); |
194c011f SW |
366 | |
367 | if (dip->i_inode.i_mode & S_ISGID) { | |
c9aecf73 SW |
368 | if (S_ISDIR(inode->i_mode)) |
369 | inode->i_mode |= S_ISGID; | |
370 | inode->i_gid = dip->i_inode.i_gid; | |
194c011f | 371 | } else |
c9aecf73 | 372 | inode->i_gid = current_fsgid(); |
194c011f SW |
373 | } |
374 | ||
b2c8b3ea | 375 | static int alloc_dinode(struct gfs2_inode *ip, u32 flags, unsigned *dblocks) |
194c011f | 376 | { |
c9aecf73 | 377 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b2c8b3ea | 378 | struct gfs2_alloc_parms ap = { .target = *dblocks, .aflags = flags, }; |
194c011f SW |
379 | int error; |
380 | ||
b8fbf471 | 381 | error = gfs2_quota_lock_check(ip, &ap); |
194c011f SW |
382 | if (error) |
383 | goto out; | |
384 | ||
7b9cff46 | 385 | error = gfs2_inplace_reserve(ip, &ap); |
fd4b4e04 SW |
386 | if (error) |
387 | goto out_quota; | |
388 | ||
b2c8b3ea | 389 | error = gfs2_trans_begin(sdp, (*dblocks * RES_RG_BIT) + RES_STATFS + RES_QUOTA, 0); |
194c011f SW |
390 | if (error) |
391 | goto out_ipreserv; | |
392 | ||
b2c8b3ea | 393 | error = gfs2_alloc_blocks(ip, &ip->i_no_addr, dblocks, 1, &ip->i_generation); |
c9aecf73 SW |
394 | ip->i_no_formal_ino = ip->i_generation; |
395 | ip->i_inode.i_ino = ip->i_no_addr; | |
396 | ip->i_goal = ip->i_no_addr; | |
194c011f SW |
397 | |
398 | gfs2_trans_end(sdp); | |
399 | ||
400 | out_ipreserv: | |
c9aecf73 | 401 | gfs2_inplace_release(ip); |
fd4b4e04 SW |
402 | out_quota: |
403 | gfs2_quota_unlock(ip); | |
194c011f | 404 | out: |
194c011f SW |
405 | return error; |
406 | } | |
407 | ||
f2741d98 SW |
408 | static void gfs2_init_dir(struct buffer_head *dibh, |
409 | const struct gfs2_inode *parent) | |
e2d0a13b SW |
410 | { |
411 | struct gfs2_dinode *di = (struct gfs2_dinode *)dibh->b_data; | |
412 | struct gfs2_dirent *dent = (struct gfs2_dirent *)(di+1); | |
413 | ||
414 | gfs2_qstr2dirent(&gfs2_qdot, GFS2_DIRENT_SIZE(gfs2_qdot.len), dent); | |
415 | dent->de_inum = di->di_num; /* already GFS2 endian */ | |
416 | dent->de_type = cpu_to_be16(DT_DIR); | |
417 | ||
418 | dent = (struct gfs2_dirent *)((char*)dent + GFS2_DIRENT_SIZE(1)); | |
419 | gfs2_qstr2dirent(&gfs2_qdotdot, dibh->b_size - GFS2_DIRENT_SIZE(1) - sizeof(struct gfs2_dinode), dent); | |
420 | gfs2_inum_out(parent, dent); | |
421 | dent->de_type = cpu_to_be16(DT_DIR); | |
422 | ||
423 | } | |
424 | ||
b2c8b3ea SW |
425 | /** |
426 | * gfs2_init_xattr - Initialise an xattr block for a new inode | |
427 | * @ip: The inode in question | |
428 | * | |
429 | * This sets up an empty xattr block for a new inode, ready to | |
430 | * take any ACLs, LSM xattrs, etc. | |
431 | */ | |
432 | ||
433 | static void gfs2_init_xattr(struct gfs2_inode *ip) | |
434 | { | |
435 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); | |
436 | struct buffer_head *bh; | |
437 | struct gfs2_ea_header *ea; | |
438 | ||
439 | bh = gfs2_meta_new(ip->i_gl, ip->i_eattr); | |
440 | gfs2_trans_add_meta(ip->i_gl, bh); | |
441 | gfs2_metatype_set(bh, GFS2_METATYPE_EA, GFS2_FORMAT_EA); | |
442 | gfs2_buffer_clear_tail(bh, sizeof(struct gfs2_meta_header)); | |
443 | ||
444 | ea = GFS2_EA_BH2FIRST(bh); | |
445 | ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize); | |
446 | ea->ea_type = GFS2_EATYPE_UNUSED; | |
447 | ea->ea_flags = GFS2_EAFLAG_LAST; | |
448 | ||
449 | brelse(bh); | |
450 | } | |
451 | ||
194c011f SW |
452 | /** |
453 | * init_dinode - Fill in a new dinode structure | |
f2741d98 | 454 | * @dip: The directory this inode is being created in |
c9aecf73 | 455 | * @ip: The inode |
f2741d98 | 456 | * @symname: The symlink destination (if a symlink) |
f2741d98 | 457 | * @bhp: The buffer head (returned to caller) |
194c011f SW |
458 | * |
459 | */ | |
460 | ||
c9aecf73 | 461 | static void init_dinode(struct gfs2_inode *dip, struct gfs2_inode *ip, |
79ba7480 | 462 | const char *symname) |
194c011f | 463 | { |
194c011f SW |
464 | struct gfs2_dinode *di; |
465 | struct buffer_head *dibh; | |
194c011f | 466 | |
c9aecf73 | 467 | dibh = gfs2_meta_new(ip->i_gl, ip->i_no_addr); |
350a9b0a | 468 | gfs2_trans_add_meta(ip->i_gl, dibh); |
194c011f | 469 | di = (struct gfs2_dinode *)dibh->b_data; |
79ba7480 | 470 | gfs2_dinode_out(ip, di); |
194c011f | 471 | |
c9aecf73 SW |
472 | di->di_major = cpu_to_be32(MAJOR(ip->i_inode.i_rdev)); |
473 | di->di_minor = cpu_to_be32(MINOR(ip->i_inode.i_rdev)); | |
194c011f | 474 | di->__pad1 = 0; |
194c011f SW |
475 | di->__pad2 = 0; |
476 | di->__pad3 = 0; | |
194c011f | 477 | memset(&di->__pad4, 0, sizeof(di->__pad4)); |
194c011f | 478 | memset(&di->di_reserved, 0, sizeof(di->di_reserved)); |
79ba7480 | 479 | gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode)); |
160b4026 | 480 | |
c9aecf73 | 481 | switch(ip->i_inode.i_mode & S_IFMT) { |
160b4026 | 482 | case S_IFDIR: |
e2d0a13b | 483 | gfs2_init_dir(dibh, dip); |
160b4026 SW |
484 | break; |
485 | case S_IFLNK: | |
c9aecf73 | 486 | memcpy(dibh->b_data + sizeof(struct gfs2_dinode), symname, ip->i_inode.i_size); |
160b4026 | 487 | break; |
e2d0a13b SW |
488 | } |
489 | ||
194c011f | 490 | set_buffer_uptodate(dibh); |
79ba7480 | 491 | brelse(dibh); |
194c011f SW |
492 | } |
493 | ||
534cf9ca SW |
494 | /** |
495 | * gfs2_trans_da_blocks - Calculate number of blocks to link inode | |
496 | * @dip: The directory we are linking into | |
497 | * @da: The dir add information | |
498 | * @nr_inodes: The number of inodes involved | |
499 | * | |
500 | * This calculate the number of blocks we need to reserve in a | |
501 | * transaction to link @nr_inodes into a directory. In most cases | |
502 | * @nr_inodes will be 2 (the directory plus the inode being linked in) | |
503 | * but in case of rename, 4 may be required. | |
504 | * | |
505 | * Returns: Number of blocks | |
506 | */ | |
507 | ||
508 | static unsigned gfs2_trans_da_blks(const struct gfs2_inode *dip, | |
509 | const struct gfs2_diradd *da, | |
510 | unsigned nr_inodes) | |
511 | { | |
512 | return da->nr_blocks + gfs2_rg_blocks(dip, da->nr_blocks) + | |
513 | (nr_inodes * RES_DINODE) + RES_QUOTA + RES_STATFS; | |
514 | } | |
515 | ||
194c011f | 516 | static int link_dinode(struct gfs2_inode *dip, const struct qstr *name, |
3c1c0ae1 | 517 | struct gfs2_inode *ip, struct gfs2_diradd *da) |
194c011f SW |
518 | { |
519 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); | |
3c1c0ae1 | 520 | struct gfs2_alloc_parms ap = { .target = da->nr_blocks, }; |
194c011f SW |
521 | int error; |
522 | ||
3c1c0ae1 | 523 | if (da->nr_blocks) { |
b8fbf471 | 524 | error = gfs2_quota_lock_check(dip, &ap); |
194c011f SW |
525 | if (error) |
526 | goto fail_quota_locks; | |
527 | ||
7b9cff46 | 528 | error = gfs2_inplace_reserve(dip, &ap); |
194c011f SW |
529 | if (error) |
530 | goto fail_quota_locks; | |
531 | ||
534cf9ca | 532 | error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, da, 2), 0); |
194c011f SW |
533 | if (error) |
534 | goto fail_ipreserv; | |
535 | } else { | |
536 | error = gfs2_trans_begin(sdp, RES_LEAF + 2 * RES_DINODE, 0); | |
537 | if (error) | |
538 | goto fail_quota_locks; | |
539 | } | |
540 | ||
2b47dad8 | 541 | error = gfs2_dir_add(&dip->i_inode, name, ip, da); |
194c011f | 542 | |
194c011f | 543 | gfs2_trans_end(sdp); |
194c011f | 544 | fail_ipreserv: |
fd4b4e04 | 545 | gfs2_inplace_release(dip); |
194c011f SW |
546 | fail_quota_locks: |
547 | gfs2_quota_unlock(dip); | |
194c011f SW |
548 | return error; |
549 | } | |
550 | ||
46cc1e5f | 551 | static int gfs2_initxattrs(struct inode *inode, const struct xattr *xattr_array, |
9d8f13ba | 552 | void *fs_info) |
194c011f | 553 | { |
9d8f13ba MZ |
554 | const struct xattr *xattr; |
555 | int err = 0; | |
556 | ||
557 | for (xattr = xattr_array; xattr->name != NULL; xattr++) { | |
558 | err = __gfs2_xattr_set(inode, xattr->name, xattr->value, | |
559 | xattr->value_len, 0, | |
560 | GFS2_EATYPE_SECURITY); | |
561 | if (err < 0) | |
562 | break; | |
194c011f | 563 | } |
194c011f SW |
564 | return err; |
565 | } | |
b3b94faa | 566 | |
194c011f | 567 | /** |
f2741d98 SW |
568 | * gfs2_create_inode - Create a new inode |
569 | * @dir: The parent directory | |
570 | * @dentry: The new dentry | |
6d4ade98 | 571 | * @file: If non-NULL, the file which is being opened |
f2741d98 SW |
572 | * @mode: The permissions on the new inode |
573 | * @dev: For device nodes, this is the device number | |
574 | * @symname: For symlinks, this is the link destination | |
575 | * @size: The initial size of the inode (ignored for directories) | |
194c011f | 576 | * |
f2741d98 | 577 | * Returns: 0 on success, or error code |
194c011f SW |
578 | */ |
579 | ||
f2741d98 | 580 | static int gfs2_create_inode(struct inode *dir, struct dentry *dentry, |
6d4ade98 | 581 | struct file *file, |
175a4eb7 | 582 | umode_t mode, dev_t dev, const char *symname, |
6d4ade98 | 583 | unsigned int size, int excl, int *opened) |
194c011f | 584 | { |
f2741d98 | 585 | const struct qstr *name = &dentry->d_name; |
e01580bf | 586 | struct posix_acl *default_acl, *acl; |
f2741d98 | 587 | struct gfs2_holder ghs[2]; |
194c011f | 588 | struct inode *inode = NULL; |
8e2e0047 | 589 | struct gfs2_inode *dip = GFS2_I(dir), *ip; |
194c011f | 590 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); |
a4923865 | 591 | struct gfs2_glock *io_gl = NULL; |
783013c0 | 592 | int error, free_vfs_inode = 1; |
9dbe9610 | 593 | u32 aflags = 0; |
b2c8b3ea | 594 | unsigned blocks = 1; |
19aeb5a6 | 595 | struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, }; |
194c011f SW |
596 | |
597 | if (!name->len || name->len > GFS2_FNAMESIZE) | |
f2741d98 | 598 | return -ENAMETOOLONG; |
194c011f | 599 | |
b54e9a0b | 600 | error = gfs2_rsqa_alloc(dip); |
0a305e49 BP |
601 | if (error) |
602 | return error; | |
603 | ||
fd4b4e04 SW |
604 | error = gfs2_rindex_update(sdp); |
605 | if (error) | |
606 | return error; | |
607 | ||
f2741d98 | 608 | error = gfs2_glock_nq_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); |
194c011f SW |
609 | if (error) |
610 | goto fail; | |
e0b62e21 | 611 | gfs2_holder_mark_uninitialized(ghs + 1); |
194c011f SW |
612 | |
613 | error = create_ok(dip, name, mode); | |
5a00f3cc SW |
614 | if (error) |
615 | goto fail_gunlock; | |
616 | ||
617 | inode = gfs2_dir_search(dir, &dentry->d_name, !S_ISREG(mode) || excl); | |
618 | error = PTR_ERR(inode); | |
619 | if (!IS_ERR(inode)) { | |
571a4b57 AV |
620 | if (S_ISDIR(inode->i_mode)) { |
621 | iput(inode); | |
622 | inode = ERR_PTR(-EISDIR); | |
623 | goto fail_gunlock; | |
624 | } | |
44bb31ba | 625 | d_instantiate(dentry, inode); |
6d4ade98 | 626 | error = 0; |
0d0d1107 | 627 | if (file) { |
44bb31ba | 628 | if (S_ISREG(inode->i_mode)) |
5ca1db41 | 629 | error = finish_open(file, dentry, gfs2_open_common, opened); |
44bb31ba AV |
630 | else |
631 | error = finish_no_open(file, NULL); | |
6d4ade98 | 632 | } |
9a63edd1 | 633 | gfs2_glock_dq_uninit(ghs); |
6d4ade98 | 634 | return error; |
5a00f3cc | 635 | } else if (error != -ENOENT) { |
194c011f | 636 | goto fail_gunlock; |
5a00f3cc | 637 | } |
194c011f | 638 | |
3c1c0ae1 | 639 | error = gfs2_diradd_alloc_required(dir, name, &da); |
fd4b4e04 SW |
640 | if (error < 0) |
641 | goto fail_gunlock; | |
642 | ||
c9aecf73 | 643 | inode = new_inode(sdp->sd_vfs); |
fd4b4e04 SW |
644 | error = -ENOMEM; |
645 | if (!inode) | |
646 | goto fail_gunlock; | |
647 | ||
e01580bf CH |
648 | error = posix_acl_create(dir, &mode, &default_acl, &acl); |
649 | if (error) | |
783013c0 | 650 | goto fail_gunlock; |
e01580bf | 651 | |
c9aecf73 | 652 | ip = GFS2_I(inode); |
b54e9a0b | 653 | error = gfs2_rsqa_alloc(ip); |
194c011f | 654 | if (error) |
e01580bf | 655 | goto fail_free_acls; |
c9aecf73 | 656 | |
c9aecf73 | 657 | inode->i_mode = mode; |
79ba7480 | 658 | set_nlink(inode, S_ISDIR(mode) ? 2 : 1); |
c9aecf73 SW |
659 | inode->i_rdev = dev; |
660 | inode->i_size = size; | |
078cd827 | 661 | inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode); |
28fb3027 | 662 | gfs2_set_inode_blocks(inode, 1); |
c9aecf73 | 663 | munge_mode_uid_gid(dip, inode); |
00a158be | 664 | check_and_update_goal(dip); |
c9aecf73 | 665 | ip->i_goal = dip->i_goal; |
28fb3027 SW |
666 | ip->i_diskflags = 0; |
667 | ip->i_eattr = 0; | |
668 | ip->i_height = 0; | |
669 | ip->i_depth = 0; | |
670 | ip->i_entries = 0; | |
cc963a11 | 671 | ip->i_no_addr = 0; /* Temporarily zero until real addr is assigned */ |
28fb3027 SW |
672 | |
673 | switch(mode & S_IFMT) { | |
674 | case S_IFREG: | |
675 | if ((dip->i_diskflags & GFS2_DIF_INHERIT_JDATA) || | |
676 | gfs2_tune_get(sdp, gt_new_files_jdata)) | |
677 | ip->i_diskflags |= GFS2_DIF_JDATA; | |
678 | gfs2_set_aops(inode); | |
679 | break; | |
680 | case S_IFDIR: | |
681 | ip->i_diskflags |= (dip->i_diskflags & GFS2_DIF_INHERIT_JDATA); | |
682 | ip->i_diskflags |= GFS2_DIF_JDATA; | |
683 | ip->i_entries = 2; | |
684 | break; | |
685 | } | |
acc546fd AD |
686 | |
687 | /* Force SYSTEM flag on all files and subdirs of a SYSTEM directory */ | |
688 | if (dip->i_diskflags & GFS2_DIF_SYSTEM) | |
689 | ip->i_diskflags |= GFS2_DIF_SYSTEM; | |
690 | ||
28fb3027 | 691 | gfs2_set_inode_flags(inode); |
194c011f | 692 | |
2b0143b5 | 693 | if ((GFS2_I(d_inode(sdp->sd_root_dir)) == dip) || |
9dbe9610 SW |
694 | (dip->i_diskflags & GFS2_DIF_TOPDIR)) |
695 | aflags |= GFS2_AF_ORLOV; | |
696 | ||
b2c8b3ea SW |
697 | if (default_acl || acl) |
698 | blocks++; | |
699 | ||
700 | error = alloc_dinode(ip, aflags, &blocks); | |
194c011f | 701 | if (error) |
c9aecf73 | 702 | goto fail_free_inode; |
194c011f | 703 | |
b2c8b3ea SW |
704 | gfs2_set_inode_blocks(inode, blocks); |
705 | ||
c9aecf73 | 706 | error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl); |
194c011f | 707 | if (error) |
c9aecf73 | 708 | goto fail_free_inode; |
98e5a91a | 709 | flush_delayed_work(&ip->i_gl->gl_work); |
6f6597ba | 710 | glock_set_object(ip->i_gl, ip); |
98e5a91a | 711 | |
c9aecf73 SW |
712 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1); |
713 | if (error) | |
714 | goto fail_free_inode; | |
715 | ||
b2c8b3ea | 716 | error = gfs2_trans_begin(sdp, blocks, 0); |
c9aecf73 | 717 | if (error) |
194c011f SW |
718 | goto fail_gunlock2; |
719 | ||
b2c8b3ea SW |
720 | if (blocks > 1) { |
721 | ip->i_eattr = ip->i_no_addr + 1; | |
722 | gfs2_init_xattr(ip); | |
723 | } | |
79ba7480 | 724 | init_dinode(dip, ip, symname); |
fd4b4e04 SW |
725 | gfs2_trans_end(sdp); |
726 | ||
c9aecf73 | 727 | error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_iopen_glops, CREATE, &io_gl); |
194c011f SW |
728 | if (error) |
729 | goto fail_gunlock2; | |
730 | ||
a4923865 BP |
731 | BUG_ON(test_and_set_bit(GLF_INODE_CREATING, &io_gl->gl_flags)); |
732 | ||
c9aecf73 | 733 | error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh); |
ff7f4cb4 SW |
734 | if (error) |
735 | goto fail_gunlock2; | |
0a305e49 | 736 | |
6f6597ba | 737 | glock_set_object(ip->i_iopen_gh.gh_gl, ip); |
c9aecf73 SW |
738 | gfs2_glock_put(io_gl); |
739 | gfs2_set_iop(inode); | |
740 | insert_inode_hash(inode); | |
741 | ||
783013c0 BP |
742 | free_vfs_inode = 0; /* After this point, the inode is no longer |
743 | considered free. Any failures need to undo | |
744 | the gfs2 structures. */ | |
e01580bf | 745 | if (default_acl) { |
1a39ba99 | 746 | error = __gfs2_set_acl(inode, default_acl, ACL_TYPE_DEFAULT); |
e01580bf CH |
747 | posix_acl_release(default_acl); |
748 | } | |
749 | if (acl) { | |
750 | if (!error) | |
1a39ba99 | 751 | error = __gfs2_set_acl(inode, acl, ACL_TYPE_ACCESS); |
e01580bf CH |
752 | posix_acl_release(acl); |
753 | } | |
754 | ||
194c011f | 755 | if (error) |
c9aecf73 | 756 | goto fail_gunlock3; |
194c011f | 757 | |
f45dc26d BP |
758 | error = security_inode_init_security(&ip->i_inode, &dip->i_inode, name, |
759 | &gfs2_initxattrs, NULL); | |
194c011f | 760 | if (error) |
c9aecf73 | 761 | goto fail_gunlock3; |
194c011f | 762 | |
3c1c0ae1 | 763 | error = link_dinode(dip, name, ip, &da); |
194c011f | 764 | if (error) |
c9aecf73 | 765 | goto fail_gunlock3; |
194c011f | 766 | |
79ba7480 | 767 | mark_inode_dirty(inode); |
6d4ade98 | 768 | d_instantiate(dentry, inode); |
c5bf8fef MS |
769 | if (file) { |
770 | *opened |= FILE_CREATED; | |
6d4ade98 | 771 | error = finish_open(file, dentry, gfs2_open_common, opened); |
c5bf8fef | 772 | } |
28fb3027 SW |
773 | gfs2_glock_dq_uninit(ghs); |
774 | gfs2_glock_dq_uninit(ghs + 1); | |
a4923865 | 775 | clear_bit(GLF_INODE_CREATING, &io_gl->gl_flags); |
6d4ade98 | 776 | return error; |
194c011f | 777 | |
c9aecf73 | 778 | fail_gunlock3: |
9c1b2808 | 779 | glock_clear_object(io_gl, ip); |
783013c0 BP |
780 | gfs2_glock_dq_uninit(&ip->i_iopen_gh); |
781 | gfs2_glock_put(io_gl); | |
194c011f | 782 | fail_gunlock2: |
a4923865 BP |
783 | if (io_gl) |
784 | clear_bit(GLF_INODE_CREATING, &io_gl->gl_flags); | |
c9aecf73 | 785 | fail_free_inode: |
9c1b2808 BP |
786 | if (ip->i_gl) { |
787 | glock_clear_object(ip->i_gl, ip); | |
c9aecf73 | 788 | gfs2_glock_put(ip->i_gl); |
9c1b2808 | 789 | } |
b54e9a0b | 790 | gfs2_rsqa_delete(ip, NULL); |
e01580bf CH |
791 | fail_free_acls: |
792 | if (default_acl) | |
793 | posix_acl_release(default_acl); | |
794 | if (acl) | |
795 | posix_acl_release(acl); | |
194c011f | 796 | fail_gunlock: |
2b47dad8 | 797 | gfs2_dir_no_add(&da); |
f2741d98 | 798 | gfs2_glock_dq_uninit(ghs); |
40ac218f | 799 | if (inode && !IS_ERR(inode)) { |
79ba7480 | 800 | clear_nlink(inode); |
05978803 AD |
801 | if (!free_vfs_inode) |
802 | mark_inode_dirty(inode); | |
803 | set_bit(free_vfs_inode ? GIF_FREE_VFS_INODE : GIF_ALLOC_FAILED, | |
804 | &GFS2_I(inode)->i_flags); | |
40ac218f SW |
805 | iput(inode); |
806 | } | |
e0b62e21 AG |
807 | if (gfs2_holder_initialized(ghs + 1)) |
808 | gfs2_glock_dq_uninit(ghs + 1); | |
194c011f | 809 | fail: |
f2741d98 | 810 | return error; |
194c011f | 811 | } |
f2741d98 | 812 | |
b3b94faa DT |
813 | /** |
814 | * gfs2_create - Create a file | |
815 | * @dir: The directory in which to create the file | |
816 | * @dentry: The dentry of the new file | |
817 | * @mode: The mode of the new file | |
818 | * | |
819 | * Returns: errno | |
820 | */ | |
821 | ||
822 | static int gfs2_create(struct inode *dir, struct dentry *dentry, | |
ebfc3b49 | 823 | umode_t mode, bool excl) |
b3b94faa | 824 | { |
6d4ade98 | 825 | return gfs2_create_inode(dir, dentry, NULL, S_IFREG | mode, 0, NULL, 0, excl, NULL); |
b3b94faa DT |
826 | } |
827 | ||
828 | /** | |
6d4ade98 | 829 | * __gfs2_lookup - Look up a filename in a directory and return its inode |
b3b94faa DT |
830 | * @dir: The directory inode |
831 | * @dentry: The dentry of the new inode | |
6d4ade98 SW |
832 | * @file: File to be opened |
833 | * @opened: atomic_open flags | |
b3b94faa | 834 | * |
b3b94faa DT |
835 | * |
836 | * Returns: errno | |
837 | */ | |
838 | ||
6d4ade98 SW |
839 | static struct dentry *__gfs2_lookup(struct inode *dir, struct dentry *dentry, |
840 | struct file *file, int *opened) | |
b3b94faa | 841 | { |
6d4ade98 SW |
842 | struct inode *inode; |
843 | struct dentry *d; | |
844 | struct gfs2_holder gh; | |
845 | struct gfs2_glock *gl; | |
846 | int error; | |
847 | ||
848 | inode = gfs2_lookupi(dir, &dentry->d_name, 0); | |
7b7a9115 BC |
849 | if (inode == NULL) { |
850 | d_add(dentry, NULL); | |
6d4ade98 | 851 | return NULL; |
7b7a9115 | 852 | } |
6d4ade98 SW |
853 | if (IS_ERR(inode)) |
854 | return ERR_CAST(inode); | |
855 | ||
856 | gl = GFS2_I(inode)->i_gl; | |
857 | error = gfs2_glock_nq_init(gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); | |
858 | if (error) { | |
859 | iput(inode); | |
860 | return ERR_PTR(error); | |
9656b2c1 | 861 | } |
6d4ade98 SW |
862 | |
863 | d = d_splice_alias(inode, dentry); | |
d57b9c9a | 864 | if (IS_ERR(d)) { |
d57b9c9a BF |
865 | gfs2_glock_dq_uninit(&gh); |
866 | return d; | |
867 | } | |
6d4ade98 SW |
868 | if (file && S_ISREG(inode->i_mode)) |
869 | error = finish_open(file, dentry, gfs2_open_common, opened); | |
870 | ||
871 | gfs2_glock_dq_uninit(&gh); | |
5ca1db41 MS |
872 | if (error) { |
873 | dput(d); | |
6d4ade98 | 874 | return ERR_PTR(error); |
5ca1db41 | 875 | } |
6d4ade98 SW |
876 | return d; |
877 | } | |
878 | ||
879 | static struct dentry *gfs2_lookup(struct inode *dir, struct dentry *dentry, | |
880 | unsigned flags) | |
881 | { | |
882 | return __gfs2_lookup(dir, dentry, NULL, NULL); | |
b3b94faa DT |
883 | } |
884 | ||
885 | /** | |
886 | * gfs2_link - Link to a file | |
887 | * @old_dentry: The inode to link | |
888 | * @dir: Add link to this directory | |
889 | * @dentry: The name of the link | |
890 | * | |
891 | * Link the inode in "old_dentry" into the directory "dir" with the | |
892 | * name in "dentry". | |
893 | * | |
894 | * Returns: errno | |
895 | */ | |
896 | ||
897 | static int gfs2_link(struct dentry *old_dentry, struct inode *dir, | |
898 | struct dentry *dentry) | |
899 | { | |
feaa7bba SW |
900 | struct gfs2_inode *dip = GFS2_I(dir); |
901 | struct gfs2_sbd *sdp = GFS2_SB(dir); | |
2b0143b5 | 902 | struct inode *inode = d_inode(old_dentry); |
feaa7bba | 903 | struct gfs2_inode *ip = GFS2_I(inode); |
b3b94faa | 904 | struct gfs2_holder ghs[2]; |
2baee03f | 905 | struct buffer_head *dibh; |
19aeb5a6 | 906 | struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, }; |
b3b94faa DT |
907 | int error; |
908 | ||
b60623c2 | 909 | if (S_ISDIR(inode->i_mode)) |
b3b94faa DT |
910 | return -EPERM; |
911 | ||
b54e9a0b | 912 | error = gfs2_rsqa_alloc(dip); |
0a305e49 BP |
913 | if (error) |
914 | return error; | |
915 | ||
b3b94faa DT |
916 | gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); |
917 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); | |
918 | ||
72dbf479 BP |
919 | error = gfs2_glock_nq(ghs); /* parent */ |
920 | if (error) | |
921 | goto out_parent; | |
922 | ||
923 | error = gfs2_glock_nq(ghs + 1); /* child */ | |
b3b94faa | 924 | if (error) |
72dbf479 | 925 | goto out_child; |
b3b94faa | 926 | |
d192a8e5 SW |
927 | error = -ENOENT; |
928 | if (inode->i_nlink == 0) | |
929 | goto out_gunlock; | |
930 | ||
10556cb2 | 931 | error = gfs2_permission(dir, MAY_WRITE | MAY_EXEC); |
b3b94faa DT |
932 | if (error) |
933 | goto out_gunlock; | |
934 | ||
dbb7cae2 | 935 | error = gfs2_dir_check(dir, &dentry->d_name, NULL); |
b3b94faa DT |
936 | switch (error) { |
937 | case -ENOENT: | |
938 | break; | |
939 | case 0: | |
940 | error = -EEXIST; | |
941 | default: | |
942 | goto out_gunlock; | |
943 | } | |
944 | ||
945 | error = -EINVAL; | |
4f56110a | 946 | if (!dip->i_inode.i_nlink) |
b3b94faa DT |
947 | goto out_gunlock; |
948 | error = -EFBIG; | |
ad6203f2 | 949 | if (dip->i_entries == (u32)-1) |
b3b94faa DT |
950 | goto out_gunlock; |
951 | error = -EPERM; | |
952 | if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) | |
953 | goto out_gunlock; | |
954 | error = -EINVAL; | |
4f56110a | 955 | if (!ip->i_inode.i_nlink) |
b3b94faa DT |
956 | goto out_gunlock; |
957 | error = -EMLINK; | |
4f56110a | 958 | if (ip->i_inode.i_nlink == (u32)-1) |
b3b94faa DT |
959 | goto out_gunlock; |
960 | ||
3c1c0ae1 | 961 | error = gfs2_diradd_alloc_required(dir, &dentry->d_name, &da); |
c752666c | 962 | if (error < 0) |
b3b94faa DT |
963 | goto out_gunlock; |
964 | ||
3c1c0ae1 SW |
965 | if (da.nr_blocks) { |
966 | struct gfs2_alloc_parms ap = { .target = da.nr_blocks, }; | |
b8fbf471 | 967 | error = gfs2_quota_lock_check(dip, &ap); |
b3b94faa | 968 | if (error) |
5407e242 | 969 | goto out_gunlock; |
b3b94faa | 970 | |
7b9cff46 | 971 | error = gfs2_inplace_reserve(dip, &ap); |
b3b94faa DT |
972 | if (error) |
973 | goto out_gunlock_q; | |
974 | ||
534cf9ca | 975 | error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, &da, 2), 0); |
b3b94faa DT |
976 | if (error) |
977 | goto out_ipres; | |
978 | } else { | |
979 | error = gfs2_trans_begin(sdp, 2 * RES_DINODE + RES_LEAF, 0); | |
980 | if (error) | |
981 | goto out_ipres; | |
982 | } | |
983 | ||
2baee03f | 984 | error = gfs2_meta_inode_buffer(ip, &dibh); |
b3b94faa DT |
985 | if (error) |
986 | goto out_end_trans; | |
987 | ||
2b47dad8 | 988 | error = gfs2_dir_add(dir, &dentry->d_name, ip, &da); |
2baee03f SW |
989 | if (error) |
990 | goto out_brelse; | |
991 | ||
350a9b0a | 992 | gfs2_trans_add_meta(ip->i_gl, dibh); |
2baee03f | 993 | inc_nlink(&ip->i_inode); |
078cd827 | 994 | ip->i_inode.i_ctime = current_time(&ip->i_inode); |
ab9bbda0 SW |
995 | ihold(inode); |
996 | d_instantiate(dentry, inode); | |
997 | mark_inode_dirty(inode); | |
b3b94faa | 998 | |
2baee03f SW |
999 | out_brelse: |
1000 | brelse(dibh); | |
feaa7bba | 1001 | out_end_trans: |
b3b94faa | 1002 | gfs2_trans_end(sdp); |
feaa7bba | 1003 | out_ipres: |
3c1c0ae1 | 1004 | if (da.nr_blocks) |
b3b94faa | 1005 | gfs2_inplace_release(dip); |
feaa7bba | 1006 | out_gunlock_q: |
3c1c0ae1 | 1007 | if (da.nr_blocks) |
b3b94faa | 1008 | gfs2_quota_unlock(dip); |
feaa7bba | 1009 | out_gunlock: |
2b47dad8 | 1010 | gfs2_dir_no_add(&da); |
72dbf479 BP |
1011 | gfs2_glock_dq(ghs + 1); |
1012 | out_child: | |
1013 | gfs2_glock_dq(ghs); | |
1014 | out_parent: | |
b3b94faa DT |
1015 | gfs2_holder_uninit(ghs); |
1016 | gfs2_holder_uninit(ghs + 1); | |
b3b94faa DT |
1017 | return error; |
1018 | } | |
1019 | ||
87ec2174 SW |
1020 | /* |
1021 | * gfs2_unlink_ok - check to see that a inode is still in a directory | |
1022 | * @dip: the directory | |
1023 | * @name: the name of the file | |
1024 | * @ip: the inode | |
1025 | * | |
1026 | * Assumes that the lock on (at least) @dip is held. | |
1027 | * | |
1028 | * Returns: 0 if the parent/child relationship is correct, errno if it isn't | |
1029 | */ | |
1030 | ||
1031 | static int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name, | |
1032 | const struct gfs2_inode *ip) | |
1033 | { | |
1034 | int error; | |
1035 | ||
1036 | if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode)) | |
1037 | return -EPERM; | |
1038 | ||
1039 | if ((dip->i_inode.i_mode & S_ISVTX) && | |
6b24c0d2 EB |
1040 | !uid_eq(dip->i_inode.i_uid, current_fsuid()) && |
1041 | !uid_eq(ip->i_inode.i_uid, current_fsuid()) && !capable(CAP_FOWNER)) | |
87ec2174 SW |
1042 | return -EPERM; |
1043 | ||
1044 | if (IS_APPEND(&dip->i_inode)) | |
1045 | return -EPERM; | |
1046 | ||
10556cb2 | 1047 | error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC); |
87ec2174 SW |
1048 | if (error) |
1049 | return error; | |
1050 | ||
37975f15 | 1051 | return gfs2_dir_check(&dip->i_inode, name, ip); |
87ec2174 SW |
1052 | } |
1053 | ||
b3b94faa | 1054 | /** |
855d23ce SW |
1055 | * gfs2_unlink_inode - Removes an inode from its parent dir and unlinks it |
1056 | * @dip: The parent directory | |
1057 | * @name: The name of the entry in the parent directory | |
855d23ce SW |
1058 | * @inode: The inode to be removed |
1059 | * | |
1060 | * Called with all the locks and in a transaction. This will only be | |
1061 | * called for a directory after it has been checked to ensure it is empty. | |
1062 | * | |
1063 | * Returns: 0 on success, or an error | |
1064 | */ | |
1065 | ||
1066 | static int gfs2_unlink_inode(struct gfs2_inode *dip, | |
4327a9bf | 1067 | const struct dentry *dentry) |
855d23ce | 1068 | { |
2b0143b5 | 1069 | struct inode *inode = d_inode(dentry); |
855d23ce SW |
1070 | struct gfs2_inode *ip = GFS2_I(inode); |
1071 | int error; | |
1072 | ||
1073 | error = gfs2_dir_del(dip, dentry); | |
1074 | if (error) | |
1075 | return error; | |
1076 | ||
1077 | ip->i_entries = 0; | |
078cd827 | 1078 | inode->i_ctime = current_time(inode); |
855d23ce SW |
1079 | if (S_ISDIR(inode->i_mode)) |
1080 | clear_nlink(inode); | |
1081 | else | |
1082 | drop_nlink(inode); | |
855d23ce SW |
1083 | mark_inode_dirty(inode); |
1084 | if (inode->i_nlink == 0) | |
1085 | gfs2_unlink_di(inode); | |
1086 | return 0; | |
1087 | } | |
1088 | ||
1089 | ||
1090 | /** | |
1091 | * gfs2_unlink - Unlink an inode (this does rmdir as well) | |
1092 | * @dir: The inode of the directory containing the inode to unlink | |
b3b94faa DT |
1093 | * @dentry: The file itself |
1094 | * | |
855d23ce SW |
1095 | * This routine uses the type of the inode as a flag to figure out |
1096 | * whether this is an unlink or an rmdir. | |
b3b94faa DT |
1097 | * |
1098 | * Returns: errno | |
1099 | */ | |
1100 | ||
1101 | static int gfs2_unlink(struct inode *dir, struct dentry *dentry) | |
1102 | { | |
feaa7bba SW |
1103 | struct gfs2_inode *dip = GFS2_I(dir); |
1104 | struct gfs2_sbd *sdp = GFS2_SB(dir); | |
2b0143b5 | 1105 | struct inode *inode = d_inode(dentry); |
855d23ce | 1106 | struct gfs2_inode *ip = GFS2_I(inode); |
ddee7608 RC |
1107 | struct gfs2_holder ghs[3]; |
1108 | struct gfs2_rgrpd *rgd; | |
5e2f7d61 BP |
1109 | int error; |
1110 | ||
1111 | error = gfs2_rindex_update(sdp); | |
1112 | if (error) | |
1113 | return error; | |
1114 | ||
1115 | error = -EROFS; | |
b3b94faa | 1116 | |
b3b94faa | 1117 | gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); |
ddee7608 | 1118 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); |
b3b94faa | 1119 | |
66fc061b | 1120 | rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr, 1); |
a365fbf3 | 1121 | if (!rgd) |
87654896 | 1122 | goto out_inodes; |
a365fbf3 | 1123 | |
ddee7608 RC |
1124 | gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2); |
1125 | ||
1126 | ||
8497a46e | 1127 | error = gfs2_glock_nq(ghs); /* parent */ |
b3b94faa | 1128 | if (error) |
8497a46e SW |
1129 | goto out_parent; |
1130 | ||
1131 | error = gfs2_glock_nq(ghs + 1); /* child */ | |
1132 | if (error) | |
1133 | goto out_child; | |
1134 | ||
d192a8e5 | 1135 | error = -ENOENT; |
855d23ce | 1136 | if (inode->i_nlink == 0) |
d192a8e5 SW |
1137 | goto out_rgrp; |
1138 | ||
855d23ce SW |
1139 | if (S_ISDIR(inode->i_mode)) { |
1140 | error = -ENOTEMPTY; | |
1141 | if (ip->i_entries > 2 || inode->i_nlink > 2) | |
1142 | goto out_rgrp; | |
1143 | } | |
1144 | ||
8497a46e SW |
1145 | error = gfs2_glock_nq(ghs + 2); /* rgrp */ |
1146 | if (error) | |
1147 | goto out_rgrp; | |
b3b94faa DT |
1148 | |
1149 | error = gfs2_unlink_ok(dip, &dentry->d_name, ip); | |
1150 | if (error) | |
72dbf479 | 1151 | goto out_gunlock; |
b3b94faa | 1152 | |
855d23ce | 1153 | error = gfs2_trans_begin(sdp, 2*RES_DINODE + 3*RES_LEAF + RES_RG_BIT, 0); |
855d23ce | 1154 | if (error) |
2eb5909d | 1155 | goto out_gunlock; |
b3b94faa | 1156 | |
4327a9bf | 1157 | error = gfs2_unlink_inode(dip, dentry); |
feaa7bba | 1158 | gfs2_trans_end(sdp); |
2eb5909d | 1159 | |
72dbf479 | 1160 | out_gunlock: |
8497a46e SW |
1161 | gfs2_glock_dq(ghs + 2); |
1162 | out_rgrp: | |
8497a46e SW |
1163 | gfs2_glock_dq(ghs + 1); |
1164 | out_child: | |
8497a46e SW |
1165 | gfs2_glock_dq(ghs); |
1166 | out_parent: | |
87654896 SW |
1167 | gfs2_holder_uninit(ghs + 2); |
1168 | out_inodes: | |
1169 | gfs2_holder_uninit(ghs + 1); | |
8497a46e | 1170 | gfs2_holder_uninit(ghs); |
b3b94faa DT |
1171 | return error; |
1172 | } | |
1173 | ||
1174 | /** | |
1175 | * gfs2_symlink - Create a symlink | |
1176 | * @dir: The directory to create the symlink in | |
1177 | * @dentry: The dentry to put the symlink in | |
1178 | * @symname: The thing which the link points to | |
1179 | * | |
1180 | * Returns: errno | |
1181 | */ | |
1182 | ||
1183 | static int gfs2_symlink(struct inode *dir, struct dentry *dentry, | |
1184 | const char *symname) | |
1185 | { | |
160b4026 | 1186 | unsigned int size; |
b3b94faa | 1187 | |
b3b94faa | 1188 | size = strlen(symname); |
235628c5 | 1189 | if (size >= gfs2_max_stuffed_size(GFS2_I(dir))) |
b3b94faa DT |
1190 | return -ENAMETOOLONG; |
1191 | ||
6d4ade98 | 1192 | return gfs2_create_inode(dir, dentry, NULL, S_IFLNK | S_IRWXUGO, 0, symname, size, 0, NULL); |
b3b94faa DT |
1193 | } |
1194 | ||
1195 | /** | |
1196 | * gfs2_mkdir - Make a directory | |
1197 | * @dir: The parent directory of the new one | |
1198 | * @dentry: The dentry of the new directory | |
1199 | * @mode: The mode of the new directory | |
1200 | * | |
1201 | * Returns: errno | |
1202 | */ | |
1203 | ||
18bb1db3 | 1204 | static int gfs2_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) |
b3b94faa | 1205 | { |
235628c5 | 1206 | unsigned dsize = gfs2_max_stuffed_size(GFS2_I(dir)); |
6d4ade98 | 1207 | return gfs2_create_inode(dir, dentry, NULL, S_IFDIR | mode, 0, NULL, dsize, 0, NULL); |
b3b94faa DT |
1208 | } |
1209 | ||
b3b94faa DT |
1210 | /** |
1211 | * gfs2_mknod - Make a special file | |
1212 | * @dir: The directory in which the special file will reside | |
1213 | * @dentry: The dentry of the special file | |
1214 | * @mode: The mode of the special file | |
f2741d98 | 1215 | * @dev: The device specification of the special file |
b3b94faa DT |
1216 | * |
1217 | */ | |
1218 | ||
1a67aafb | 1219 | static int gfs2_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, |
b3b94faa DT |
1220 | dev_t dev) |
1221 | { | |
6d4ade98 SW |
1222 | return gfs2_create_inode(dir, dentry, NULL, mode, dev, NULL, 0, 0, NULL); |
1223 | } | |
1224 | ||
1225 | /** | |
1226 | * gfs2_atomic_open - Atomically open a file | |
1227 | * @dir: The directory | |
1228 | * @dentry: The proposed new entry | |
1229 | * @file: The proposed new struct file | |
1230 | * @flags: open flags | |
1231 | * @mode: File mode | |
1232 | * @opened: Flag to say whether the file has been opened or not | |
1233 | * | |
1234 | * Returns: error code or 0 for success | |
1235 | */ | |
1236 | ||
1237 | static int gfs2_atomic_open(struct inode *dir, struct dentry *dentry, | |
86fbca49 AO |
1238 | struct file *file, unsigned flags, |
1239 | umode_t mode, int *opened) | |
6d4ade98 SW |
1240 | { |
1241 | struct dentry *d; | |
1242 | bool excl = !!(flags & O_EXCL); | |
1243 | ||
00699ad8 | 1244 | if (!d_in_lookup(dentry)) |
4d93bc3e AV |
1245 | goto skip_lookup; |
1246 | ||
6d4ade98 SW |
1247 | d = __gfs2_lookup(dir, dentry, file, opened); |
1248 | if (IS_ERR(d)) | |
1249 | return PTR_ERR(d); | |
5ca1db41 MS |
1250 | if (d != NULL) |
1251 | dentry = d; | |
2b0143b5 | 1252 | if (d_really_is_positive(dentry)) { |
ec7d879c AV |
1253 | if (!(*opened & FILE_OPENED)) |
1254 | return finish_no_open(file, d); | |
5ca1db41 | 1255 | dput(d); |
6d4ade98 SW |
1256 | return 0; |
1257 | } | |
1258 | ||
5ca1db41 | 1259 | BUG_ON(d != NULL); |
4d93bc3e AV |
1260 | |
1261 | skip_lookup: | |
6d4ade98 SW |
1262 | if (!(flags & O_CREAT)) |
1263 | return -ENOENT; | |
1264 | ||
1265 | return gfs2_create_inode(dir, dentry, file, S_IFREG | mode, 0, NULL, 0, excl, opened); | |
b3b94faa DT |
1266 | } |
1267 | ||
0188d6c5 SW |
1268 | /* |
1269 | * gfs2_ok_to_move - check if it's ok to move a directory to another directory | |
1270 | * @this: move this | |
1271 | * @to: to here | |
1272 | * | |
1273 | * Follow @to back to the root and make sure we don't encounter @this | |
1274 | * Assumes we already hold the rename lock. | |
1275 | * | |
1276 | * Returns: errno | |
1277 | */ | |
1278 | ||
1279 | static int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to) | |
1280 | { | |
1281 | struct inode *dir = &to->i_inode; | |
1282 | struct super_block *sb = dir->i_sb; | |
1283 | struct inode *tmp; | |
0188d6c5 SW |
1284 | int error = 0; |
1285 | ||
0188d6c5 SW |
1286 | igrab(dir); |
1287 | ||
1288 | for (;;) { | |
1289 | if (dir == &this->i_inode) { | |
1290 | error = -EINVAL; | |
1291 | break; | |
1292 | } | |
2b0143b5 | 1293 | if (dir == d_inode(sb->s_root)) { |
0188d6c5 SW |
1294 | error = 0; |
1295 | break; | |
1296 | } | |
1297 | ||
8d123585 | 1298 | tmp = gfs2_lookupi(dir, &gfs2_qdotdot, 1); |
48f8f711 AD |
1299 | if (!tmp) { |
1300 | error = -ENOENT; | |
1301 | break; | |
1302 | } | |
0188d6c5 SW |
1303 | if (IS_ERR(tmp)) { |
1304 | error = PTR_ERR(tmp); | |
1305 | break; | |
1306 | } | |
1307 | ||
1308 | iput(dir); | |
1309 | dir = tmp; | |
1310 | } | |
1311 | ||
1312 | iput(dir); | |
1313 | ||
1314 | return error; | |
1315 | } | |
1316 | ||
a63b7bbc BM |
1317 | /** |
1318 | * update_moved_ino - Update an inode that's being moved | |
1319 | * @ip: The inode being moved | |
1320 | * @ndip: The parent directory of the new filename | |
1321 | * @dir_rename: True of ip is a directory | |
1322 | * | |
1323 | * Returns: errno | |
1324 | */ | |
1325 | ||
1326 | static int update_moved_ino(struct gfs2_inode *ip, struct gfs2_inode *ndip, | |
1327 | int dir_rename) | |
1328 | { | |
1329 | int error; | |
1330 | struct buffer_head *dibh; | |
1331 | ||
1332 | if (dir_rename) | |
1333 | return gfs2_dir_mvino(ip, &gfs2_qdotdot, ndip, DT_DIR); | |
1334 | ||
1335 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1336 | if (error) | |
1337 | return error; | |
078cd827 | 1338 | ip->i_inode.i_ctime = current_time(&ip->i_inode); |
a63b7bbc BM |
1339 | gfs2_trans_add_meta(ip->i_gl, dibh); |
1340 | gfs2_dinode_out(ip, dibh->b_data); | |
1341 | brelse(dibh); | |
1342 | return 0; | |
1343 | } | |
1344 | ||
1345 | ||
b3b94faa DT |
1346 | /** |
1347 | * gfs2_rename - Rename a file | |
1348 | * @odir: Parent directory of old file name | |
1349 | * @odentry: The old dentry of the file | |
1350 | * @ndir: Parent directory of new file name | |
1351 | * @ndentry: The new dentry of the file | |
1352 | * | |
1353 | * Returns: errno | |
1354 | */ | |
1355 | ||
1356 | static int gfs2_rename(struct inode *odir, struct dentry *odentry, | |
1357 | struct inode *ndir, struct dentry *ndentry) | |
1358 | { | |
feaa7bba SW |
1359 | struct gfs2_inode *odip = GFS2_I(odir); |
1360 | struct gfs2_inode *ndip = GFS2_I(ndir); | |
2b0143b5 | 1361 | struct gfs2_inode *ip = GFS2_I(d_inode(odentry)); |
b3b94faa | 1362 | struct gfs2_inode *nip = NULL; |
feaa7bba | 1363 | struct gfs2_sbd *sdp = GFS2_SB(odir); |
6df9f9a2 | 1364 | struct gfs2_holder ghs[5], r_gh; |
ddee7608 | 1365 | struct gfs2_rgrpd *nrgd; |
b3b94faa DT |
1366 | unsigned int num_gh; |
1367 | int dir_rename = 0; | |
19aeb5a6 | 1368 | struct gfs2_diradd da = { .nr_blocks = 0, .save_loc = 0, }; |
b3b94faa DT |
1369 | unsigned int x; |
1370 | int error; | |
1371 | ||
6df9f9a2 | 1372 | gfs2_holder_mark_uninitialized(&r_gh); |
2b0143b5 DH |
1373 | if (d_really_is_positive(ndentry)) { |
1374 | nip = GFS2_I(d_inode(ndentry)); | |
b3b94faa DT |
1375 | if (ip == nip) |
1376 | return 0; | |
1377 | } | |
1378 | ||
5e2f7d61 BP |
1379 | error = gfs2_rindex_update(sdp); |
1380 | if (error) | |
1381 | return error; | |
1382 | ||
b54e9a0b | 1383 | error = gfs2_rsqa_alloc(ndip); |
0a305e49 BP |
1384 | if (error) |
1385 | return error; | |
1386 | ||
0188d6c5 SW |
1387 | if (odip != ndip) { |
1388 | error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE, | |
1389 | 0, &r_gh); | |
b3b94faa DT |
1390 | if (error) |
1391 | goto out; | |
1392 | ||
0188d6c5 SW |
1393 | if (S_ISDIR(ip->i_inode.i_mode)) { |
1394 | dir_rename = 1; | |
a63b7bbc | 1395 | /* don't move a directory into its subdir */ |
0188d6c5 SW |
1396 | error = gfs2_ok_to_move(ip, ndip); |
1397 | if (error) | |
1398 | goto out_gunlock_r; | |
1399 | } | |
b3b94faa DT |
1400 | } |
1401 | ||
d9d1ca30 | 1402 | num_gh = 1; |
b3b94faa | 1403 | gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); |
d9d1ca30 SW |
1404 | if (odip != ndip) { |
1405 | gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); | |
1406 | num_gh++; | |
1407 | } | |
1408 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); | |
1409 | num_gh++; | |
b3b94faa | 1410 | |
d9d1ca30 SW |
1411 | if (nip) { |
1412 | gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); | |
1413 | num_gh++; | |
ddee7608 RC |
1414 | /* grab the resource lock for unlink flag twiddling |
1415 | * this is the case of the target file already existing | |
1416 | * so we unlink before doing the rename | |
1417 | */ | |
66fc061b | 1418 | nrgd = gfs2_blk2rgrpd(sdp, nip->i_no_addr, 1); |
ddee7608 RC |
1419 | if (nrgd) |
1420 | gfs2_holder_init(nrgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh++); | |
d9d1ca30 | 1421 | } |
b3b94faa | 1422 | |
72dbf479 BP |
1423 | for (x = 0; x < num_gh; x++) { |
1424 | error = gfs2_glock_nq(ghs + x); | |
1425 | if (error) | |
1426 | goto out_gunlock; | |
1427 | } | |
b3b94faa | 1428 | |
d192a8e5 SW |
1429 | error = -ENOENT; |
1430 | if (ip->i_inode.i_nlink == 0) | |
1431 | goto out_gunlock; | |
1432 | ||
b3b94faa DT |
1433 | /* Check out the old directory */ |
1434 | ||
1435 | error = gfs2_unlink_ok(odip, &odentry->d_name, ip); | |
1436 | if (error) | |
1437 | goto out_gunlock; | |
1438 | ||
1439 | /* Check out the new directory */ | |
1440 | ||
1441 | if (nip) { | |
1442 | error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip); | |
1443 | if (error) | |
1444 | goto out_gunlock; | |
1445 | ||
d192a8e5 SW |
1446 | if (nip->i_inode.i_nlink == 0) { |
1447 | error = -EAGAIN; | |
1448 | goto out_gunlock; | |
1449 | } | |
1450 | ||
b60623c2 | 1451 | if (S_ISDIR(nip->i_inode.i_mode)) { |
ad6203f2 | 1452 | if (nip->i_entries < 2) { |
94fb763b | 1453 | gfs2_consist_inode(nip); |
b3b94faa DT |
1454 | error = -EIO; |
1455 | goto out_gunlock; | |
1456 | } | |
ad6203f2 | 1457 | if (nip->i_entries > 2) { |
b3b94faa DT |
1458 | error = -ENOTEMPTY; |
1459 | goto out_gunlock; | |
1460 | } | |
1461 | } | |
1462 | } else { | |
10556cb2 | 1463 | error = gfs2_permission(ndir, MAY_WRITE | MAY_EXEC); |
b3b94faa DT |
1464 | if (error) |
1465 | goto out_gunlock; | |
1466 | ||
dbb7cae2 | 1467 | error = gfs2_dir_check(ndir, &ndentry->d_name, NULL); |
b3b94faa DT |
1468 | switch (error) { |
1469 | case -ENOENT: | |
1470 | error = 0; | |
1471 | break; | |
1472 | case 0: | |
1473 | error = -EEXIST; | |
1474 | default: | |
1475 | goto out_gunlock; | |
1476 | }; | |
1477 | ||
1478 | if (odip != ndip) { | |
4f56110a | 1479 | if (!ndip->i_inode.i_nlink) { |
d192a8e5 | 1480 | error = -ENOENT; |
b3b94faa DT |
1481 | goto out_gunlock; |
1482 | } | |
ad6203f2 | 1483 | if (ndip->i_entries == (u32)-1) { |
b3b94faa DT |
1484 | error = -EFBIG; |
1485 | goto out_gunlock; | |
1486 | } | |
b60623c2 | 1487 | if (S_ISDIR(ip->i_inode.i_mode) && |
4f56110a | 1488 | ndip->i_inode.i_nlink == (u32)-1) { |
b3b94faa DT |
1489 | error = -EMLINK; |
1490 | goto out_gunlock; | |
1491 | } | |
1492 | } | |
1493 | } | |
1494 | ||
1495 | /* Check out the dir to be renamed */ | |
1496 | ||
1497 | if (dir_rename) { | |
2b0143b5 | 1498 | error = gfs2_permission(d_inode(odentry), MAY_WRITE); |
b3b94faa DT |
1499 | if (error) |
1500 | goto out_gunlock; | |
1501 | } | |
1502 | ||
3c1c0ae1 SW |
1503 | if (nip == NULL) { |
1504 | error = gfs2_diradd_alloc_required(ndir, &ndentry->d_name, &da); | |
1505 | if (error) | |
1506 | goto out_gunlock; | |
1507 | } | |
b3b94faa | 1508 | |
3c1c0ae1 SW |
1509 | if (da.nr_blocks) { |
1510 | struct gfs2_alloc_parms ap = { .target = da.nr_blocks, }; | |
b8fbf471 | 1511 | error = gfs2_quota_lock_check(ndip, &ap); |
b3b94faa | 1512 | if (error) |
5407e242 | 1513 | goto out_gunlock; |
b3b94faa | 1514 | |
7b9cff46 | 1515 | error = gfs2_inplace_reserve(ndip, &ap); |
b3b94faa DT |
1516 | if (error) |
1517 | goto out_gunlock_q; | |
1518 | ||
534cf9ca SW |
1519 | error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(ndip, &da, 4) + |
1520 | 4 * RES_LEAF + 4, 0); | |
b3b94faa DT |
1521 | if (error) |
1522 | goto out_ipreserv; | |
1523 | } else { | |
1524 | error = gfs2_trans_begin(sdp, 4 * RES_DINODE + | |
87d21e07 | 1525 | 5 * RES_LEAF + 4, 0); |
b3b94faa DT |
1526 | if (error) |
1527 | goto out_gunlock; | |
1528 | } | |
1529 | ||
1530 | /* Remove the target file, if it exists */ | |
1531 | ||
4327a9bf BP |
1532 | if (nip) |
1533 | error = gfs2_unlink_inode(ndip, ndentry); | |
b3b94faa | 1534 | |
a63b7bbc BM |
1535 | error = update_moved_ino(ip, ndip, dir_rename); |
1536 | if (error) | |
1537 | goto out_end_trans; | |
b3b94faa | 1538 | |
855d23ce | 1539 | error = gfs2_dir_del(odip, odentry); |
b3b94faa DT |
1540 | if (error) |
1541 | goto out_end_trans; | |
1542 | ||
2b47dad8 | 1543 | error = gfs2_dir_add(ndir, &ndentry->d_name, ip, &da); |
b3b94faa DT |
1544 | if (error) |
1545 | goto out_end_trans; | |
1546 | ||
feaa7bba | 1547 | out_end_trans: |
b3b94faa | 1548 | gfs2_trans_end(sdp); |
feaa7bba | 1549 | out_ipreserv: |
3c1c0ae1 | 1550 | if (da.nr_blocks) |
b3b94faa | 1551 | gfs2_inplace_release(ndip); |
feaa7bba | 1552 | out_gunlock_q: |
3c1c0ae1 | 1553 | if (da.nr_blocks) |
b3b94faa | 1554 | gfs2_quota_unlock(ndip); |
feaa7bba | 1555 | out_gunlock: |
2b47dad8 | 1556 | gfs2_dir_no_add(&da); |
72dbf479 BP |
1557 | while (x--) { |
1558 | gfs2_glock_dq(ghs + x); | |
b3b94faa | 1559 | gfs2_holder_uninit(ghs + x); |
72dbf479 | 1560 | } |
feaa7bba | 1561 | out_gunlock_r: |
6df9f9a2 | 1562 | if (gfs2_holder_initialized(&r_gh)) |
b3b94faa | 1563 | gfs2_glock_dq_uninit(&r_gh); |
feaa7bba | 1564 | out: |
b3b94faa DT |
1565 | return error; |
1566 | } | |
1567 | ||
a63b7bbc BM |
1568 | /** |
1569 | * gfs2_exchange - exchange two files | |
1570 | * @odir: Parent directory of old file name | |
1571 | * @odentry: The old dentry of the file | |
1572 | * @ndir: Parent directory of new file name | |
1573 | * @ndentry: The new dentry of the file | |
1574 | * @flags: The rename flags | |
1575 | * | |
1576 | * Returns: errno | |
1577 | */ | |
1578 | ||
1579 | static int gfs2_exchange(struct inode *odir, struct dentry *odentry, | |
1580 | struct inode *ndir, struct dentry *ndentry, | |
1581 | unsigned int flags) | |
1582 | { | |
1583 | struct gfs2_inode *odip = GFS2_I(odir); | |
1584 | struct gfs2_inode *ndip = GFS2_I(ndir); | |
1585 | struct gfs2_inode *oip = GFS2_I(odentry->d_inode); | |
1586 | struct gfs2_inode *nip = GFS2_I(ndentry->d_inode); | |
1587 | struct gfs2_sbd *sdp = GFS2_SB(odir); | |
6df9f9a2 | 1588 | struct gfs2_holder ghs[5], r_gh; |
a63b7bbc BM |
1589 | unsigned int num_gh; |
1590 | unsigned int x; | |
1591 | umode_t old_mode = oip->i_inode.i_mode; | |
1592 | umode_t new_mode = nip->i_inode.i_mode; | |
1593 | int error; | |
1594 | ||
6df9f9a2 | 1595 | gfs2_holder_mark_uninitialized(&r_gh); |
a63b7bbc BM |
1596 | error = gfs2_rindex_update(sdp); |
1597 | if (error) | |
1598 | return error; | |
1599 | ||
1600 | if (odip != ndip) { | |
1601 | error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE, | |
1602 | 0, &r_gh); | |
1603 | if (error) | |
1604 | goto out; | |
1605 | ||
1606 | if (S_ISDIR(old_mode)) { | |
1607 | /* don't move a directory into its subdir */ | |
1608 | error = gfs2_ok_to_move(oip, ndip); | |
1609 | if (error) | |
1610 | goto out_gunlock_r; | |
1611 | } | |
1612 | ||
1613 | if (S_ISDIR(new_mode)) { | |
1614 | /* don't move a directory into its subdir */ | |
1615 | error = gfs2_ok_to_move(nip, odip); | |
1616 | if (error) | |
1617 | goto out_gunlock_r; | |
1618 | } | |
1619 | } | |
1620 | ||
1621 | num_gh = 1; | |
1622 | gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); | |
1623 | if (odip != ndip) { | |
1624 | gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); | |
1625 | num_gh++; | |
1626 | } | |
1627 | gfs2_holder_init(oip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); | |
1628 | num_gh++; | |
1629 | ||
1630 | gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); | |
1631 | num_gh++; | |
1632 | ||
1633 | for (x = 0; x < num_gh; x++) { | |
1634 | error = gfs2_glock_nq(ghs + x); | |
1635 | if (error) | |
1636 | goto out_gunlock; | |
1637 | } | |
1638 | ||
1639 | error = -ENOENT; | |
1640 | if (oip->i_inode.i_nlink == 0 || nip->i_inode.i_nlink == 0) | |
1641 | goto out_gunlock; | |
1642 | ||
1643 | error = gfs2_unlink_ok(odip, &odentry->d_name, oip); | |
1644 | if (error) | |
1645 | goto out_gunlock; | |
1646 | error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip); | |
1647 | if (error) | |
1648 | goto out_gunlock; | |
1649 | ||
1650 | if (S_ISDIR(old_mode)) { | |
1651 | error = gfs2_permission(odentry->d_inode, MAY_WRITE); | |
1652 | if (error) | |
1653 | goto out_gunlock; | |
1654 | } | |
1655 | if (S_ISDIR(new_mode)) { | |
1656 | error = gfs2_permission(ndentry->d_inode, MAY_WRITE); | |
1657 | if (error) | |
1658 | goto out_gunlock; | |
1659 | } | |
1660 | error = gfs2_trans_begin(sdp, 4 * RES_DINODE + 4 * RES_LEAF, 0); | |
1661 | if (error) | |
1662 | goto out_gunlock; | |
1663 | ||
1664 | error = update_moved_ino(oip, ndip, S_ISDIR(old_mode)); | |
1665 | if (error) | |
1666 | goto out_end_trans; | |
1667 | ||
1668 | error = update_moved_ino(nip, odip, S_ISDIR(new_mode)); | |
1669 | if (error) | |
1670 | goto out_end_trans; | |
1671 | ||
1672 | error = gfs2_dir_mvino(ndip, &ndentry->d_name, oip, | |
1673 | IF2DT(old_mode)); | |
1674 | if (error) | |
1675 | goto out_end_trans; | |
1676 | ||
1677 | error = gfs2_dir_mvino(odip, &odentry->d_name, nip, | |
1678 | IF2DT(new_mode)); | |
1679 | if (error) | |
1680 | goto out_end_trans; | |
1681 | ||
1682 | if (odip != ndip) { | |
1683 | if (S_ISDIR(new_mode) && !S_ISDIR(old_mode)) { | |
1684 | inc_nlink(&odip->i_inode); | |
1685 | drop_nlink(&ndip->i_inode); | |
1686 | } else if (S_ISDIR(old_mode) && !S_ISDIR(new_mode)) { | |
1687 | inc_nlink(&ndip->i_inode); | |
1688 | drop_nlink(&odip->i_inode); | |
1689 | } | |
1690 | } | |
1691 | mark_inode_dirty(&ndip->i_inode); | |
1692 | if (odip != ndip) | |
1693 | mark_inode_dirty(&odip->i_inode); | |
1694 | ||
1695 | out_end_trans: | |
1696 | gfs2_trans_end(sdp); | |
1697 | out_gunlock: | |
1698 | while (x--) { | |
1699 | gfs2_glock_dq(ghs + x); | |
1700 | gfs2_holder_uninit(ghs + x); | |
1701 | } | |
1702 | out_gunlock_r: | |
6df9f9a2 | 1703 | if (gfs2_holder_initialized(&r_gh)) |
a63b7bbc BM |
1704 | gfs2_glock_dq_uninit(&r_gh); |
1705 | out: | |
1706 | return error; | |
1707 | } | |
1708 | ||
1709 | static int gfs2_rename2(struct inode *odir, struct dentry *odentry, | |
1710 | struct inode *ndir, struct dentry *ndentry, | |
1711 | unsigned int flags) | |
1712 | { | |
1713 | flags &= ~RENAME_NOREPLACE; | |
1714 | ||
1715 | if (flags & ~RENAME_EXCHANGE) | |
1716 | return -EINVAL; | |
1717 | ||
1718 | if (flags & RENAME_EXCHANGE) | |
1719 | return gfs2_exchange(odir, odentry, ndir, ndentry, flags); | |
1720 | ||
1721 | return gfs2_rename(odir, odentry, ndir, ndentry); | |
1722 | } | |
1723 | ||
536baf02 | 1724 | /** |
6b255391 | 1725 | * gfs2_get_link - Follow a symbolic link |
c177c2ac | 1726 | * @dentry: The dentry of the link |
6b255391 | 1727 | * @inode: The inode of the link |
fceef393 | 1728 | * @done: destructor for return value |
536baf02 | 1729 | * |
c177c2ac | 1730 | * This can handle symlinks of any size. |
536baf02 | 1731 | * |
c177c2ac | 1732 | * Returns: 0 on success or error code |
536baf02 SW |
1733 | */ |
1734 | ||
6b255391 | 1735 | static const char *gfs2_get_link(struct dentry *dentry, |
fceef393 AV |
1736 | struct inode *inode, |
1737 | struct delayed_call *done) | |
536baf02 | 1738 | { |
6b255391 | 1739 | struct gfs2_inode *ip = GFS2_I(inode); |
536baf02 SW |
1740 | struct gfs2_holder i_gh; |
1741 | struct buffer_head *dibh; | |
160b4026 | 1742 | unsigned int size; |
c177c2ac | 1743 | char *buf; |
536baf02 SW |
1744 | int error; |
1745 | ||
6b255391 AV |
1746 | if (!dentry) |
1747 | return ERR_PTR(-ECHILD); | |
1748 | ||
536baf02 SW |
1749 | gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh); |
1750 | error = gfs2_glock_nq(&i_gh); | |
1751 | if (error) { | |
1752 | gfs2_holder_uninit(&i_gh); | |
680baacb | 1753 | return ERR_PTR(error); |
536baf02 SW |
1754 | } |
1755 | ||
a2e0f799 SW |
1756 | size = (unsigned int)i_size_read(&ip->i_inode); |
1757 | if (size == 0) { | |
536baf02 | 1758 | gfs2_consist_inode(ip); |
c177c2ac | 1759 | buf = ERR_PTR(-EIO); |
536baf02 SW |
1760 | goto out; |
1761 | } | |
1762 | ||
1763 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
c177c2ac AV |
1764 | if (error) { |
1765 | buf = ERR_PTR(error); | |
536baf02 | 1766 | goto out; |
536baf02 SW |
1767 | } |
1768 | ||
160b4026 | 1769 | buf = kzalloc(size + 1, GFP_NOFS); |
c177c2ac AV |
1770 | if (!buf) |
1771 | buf = ERR_PTR(-ENOMEM); | |
1772 | else | |
160b4026 | 1773 | memcpy(buf, dibh->b_data + sizeof(struct gfs2_dinode), size); |
536baf02 SW |
1774 | brelse(dibh); |
1775 | out: | |
1776 | gfs2_glock_dq_uninit(&i_gh); | |
680baacb | 1777 | if (!IS_ERR(buf)) |
fceef393 | 1778 | set_delayed_call(done, kfree_link, buf); |
680baacb | 1779 | return buf; |
b3b94faa DT |
1780 | } |
1781 | ||
b3b94faa DT |
1782 | /** |
1783 | * gfs2_permission - | |
75d5cfbe SW |
1784 | * @inode: The inode |
1785 | * @mask: The mask to be tested | |
1786 | * @flags: Indicates whether this is an RCU path walk or not | |
b3b94faa | 1787 | * |
300c7d75 SW |
1788 | * This may be called from the VFS directly, or from within GFS2 with the |
1789 | * inode locked, so we look to see if the glock is already locked and only | |
1790 | * lock the glock if its not already been done. | |
1791 | * | |
b3b94faa DT |
1792 | * Returns: errno |
1793 | */ | |
1794 | ||
10556cb2 | 1795 | int gfs2_permission(struct inode *inode, int mask) |
b3b94faa | 1796 | { |
b74c79e9 | 1797 | struct gfs2_inode *ip; |
b3b94faa DT |
1798 | struct gfs2_holder i_gh; |
1799 | int error; | |
b74c79e9 | 1800 | |
6df9f9a2 | 1801 | gfs2_holder_mark_uninitialized(&i_gh); |
b74c79e9 | 1802 | ip = GFS2_I(inode); |
7afd88d9 | 1803 | if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) { |
2e60d768 BM |
1804 | if (mask & MAY_NOT_BLOCK) |
1805 | return -ECHILD; | |
1806 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh); | |
1807 | if (error) | |
1808 | return error; | |
300c7d75 | 1809 | } |
b3b94faa | 1810 | |
f58ba889 | 1811 | if ((mask & MAY_WRITE) && IS_IMMUTABLE(inode)) |
337684a1 | 1812 | error = -EPERM; |
f58ba889 | 1813 | else |
2830ba7f | 1814 | error = generic_permission(inode, mask); |
6df9f9a2 | 1815 | if (gfs2_holder_initialized(&i_gh)) |
b3b94faa | 1816 | gfs2_glock_dq_uninit(&i_gh); |
b3b94faa DT |
1817 | |
1818 | return error; | |
1819 | } | |
1820 | ||
ab9bbda0 | 1821 | static int __gfs2_setattr_simple(struct inode *inode, struct iattr *attr) |
194c011f | 1822 | { |
194c011f SW |
1823 | setattr_copy(inode, attr); |
1824 | mark_inode_dirty(inode); | |
194c011f SW |
1825 | return 0; |
1826 | } | |
1827 | ||
1828 | /** | |
1829 | * gfs2_setattr_simple - | |
1830 | * @ip: | |
1831 | * @attr: | |
1832 | * | |
1833 | * Returns: errno | |
1834 | */ | |
1835 | ||
ab9bbda0 | 1836 | int gfs2_setattr_simple(struct inode *inode, struct iattr *attr) |
194c011f SW |
1837 | { |
1838 | int error; | |
1839 | ||
1840 | if (current->journal_info) | |
ab9bbda0 | 1841 | return __gfs2_setattr_simple(inode, attr); |
194c011f | 1842 | |
ab9bbda0 | 1843 | error = gfs2_trans_begin(GFS2_SB(inode), RES_DINODE, 0); |
194c011f SW |
1844 | if (error) |
1845 | return error; | |
1846 | ||
ab9bbda0 SW |
1847 | error = __gfs2_setattr_simple(inode, attr); |
1848 | gfs2_trans_end(GFS2_SB(inode)); | |
194c011f SW |
1849 | return error; |
1850 | } | |
1851 | ||
b3b94faa DT |
1852 | static int setattr_chown(struct inode *inode, struct iattr *attr) |
1853 | { | |
feaa7bba SW |
1854 | struct gfs2_inode *ip = GFS2_I(inode); |
1855 | struct gfs2_sbd *sdp = GFS2_SB(inode); | |
7c06b5d6 EB |
1856 | kuid_t ouid, nuid; |
1857 | kgid_t ogid, ngid; | |
b3b94faa | 1858 | int error; |
b8fbf471 | 1859 | struct gfs2_alloc_parms ap; |
b3b94faa | 1860 | |
2933f925 SW |
1861 | ouid = inode->i_uid; |
1862 | ogid = inode->i_gid; | |
b3b94faa DT |
1863 | nuid = attr->ia_uid; |
1864 | ngid = attr->ia_gid; | |
1865 | ||
6b24c0d2 | 1866 | if (!(attr->ia_valid & ATTR_UID) || uid_eq(ouid, nuid)) |
f4108a60 | 1867 | ouid = nuid = NO_UID_QUOTA_CHANGE; |
6b24c0d2 | 1868 | if (!(attr->ia_valid & ATTR_GID) || gid_eq(ogid, ngid)) |
f4108a60 | 1869 | ogid = ngid = NO_GID_QUOTA_CHANGE; |
b3b94faa | 1870 | |
b54e9a0b | 1871 | error = gfs2_rsqa_alloc(ip); |
62e96cf8 BP |
1872 | if (error) |
1873 | goto out; | |
1874 | ||
1875 | error = gfs2_rindex_update(sdp); | |
1876 | if (error) | |
1877 | goto out; | |
1878 | ||
1879 | error = gfs2_quota_lock(ip, nuid, ngid); | |
1880 | if (error) | |
1881 | goto out; | |
1882 | ||
b8fbf471 AD |
1883 | ap.target = gfs2_get_inode_blocks(&ip->i_inode); |
1884 | ||
6b24c0d2 EB |
1885 | if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) || |
1886 | !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) { | |
b8fbf471 | 1887 | error = gfs2_quota_check(ip, nuid, ngid, &ap); |
b3b94faa DT |
1888 | if (error) |
1889 | goto out_gunlock_q; | |
1890 | } | |
1891 | ||
1892 | error = gfs2_trans_begin(sdp, RES_DINODE + 2 * RES_QUOTA, 0); | |
1893 | if (error) | |
1894 | goto out_gunlock_q; | |
1895 | ||
ab9bbda0 | 1896 | error = gfs2_setattr_simple(inode, attr); |
b3b94faa DT |
1897 | if (error) |
1898 | goto out_end_trans; | |
1899 | ||
6b24c0d2 EB |
1900 | if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) || |
1901 | !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) { | |
39a72580 | 1902 | gfs2_quota_change(ip, -(s64)ap.target, ouid, ogid); |
b8fbf471 | 1903 | gfs2_quota_change(ip, ap.target, nuid, ngid); |
b3b94faa DT |
1904 | } |
1905 | ||
a91ea69f | 1906 | out_end_trans: |
b3b94faa | 1907 | gfs2_trans_end(sdp); |
a91ea69f | 1908 | out_gunlock_q: |
b3b94faa | 1909 | gfs2_quota_unlock(ip); |
62e96cf8 | 1910 | out: |
b3b94faa DT |
1911 | return error; |
1912 | } | |
1913 | ||
1914 | /** | |
1915 | * gfs2_setattr - Change attributes on an inode | |
1916 | * @dentry: The dentry which is changing | |
1917 | * @attr: The structure describing the change | |
1918 | * | |
1919 | * The VFS layer wants to change one or more of an inodes attributes. Write | |
1920 | * that change out to disk. | |
1921 | * | |
1922 | * Returns: errno | |
1923 | */ | |
1924 | ||
1925 | static int gfs2_setattr(struct dentry *dentry, struct iattr *attr) | |
1926 | { | |
2b0143b5 | 1927 | struct inode *inode = d_inode(dentry); |
feaa7bba | 1928 | struct gfs2_inode *ip = GFS2_I(inode); |
b3b94faa DT |
1929 | struct gfs2_holder i_gh; |
1930 | int error; | |
1931 | ||
b54e9a0b | 1932 | error = gfs2_rsqa_alloc(ip); |
0a305e49 BP |
1933 | if (error) |
1934 | return error; | |
1935 | ||
b3b94faa DT |
1936 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); |
1937 | if (error) | |
1938 | return error; | |
1939 | ||
1940 | error = -EPERM; | |
1941 | if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) | |
1942 | goto out; | |
1943 | ||
31051c85 | 1944 | error = setattr_prepare(dentry, attr); |
b3b94faa DT |
1945 | if (error) |
1946 | goto out; | |
1947 | ||
1948 | if (attr->ia_valid & ATTR_SIZE) | |
ff8f33c8 | 1949 | error = gfs2_setattr_size(inode, attr->ia_size); |
b3b94faa DT |
1950 | else if (attr->ia_valid & (ATTR_UID | ATTR_GID)) |
1951 | error = setattr_chown(inode, attr); | |
e01580bf | 1952 | else { |
ab9bbda0 | 1953 | error = gfs2_setattr_simple(inode, attr); |
e01580bf CH |
1954 | if (!error && attr->ia_valid & ATTR_MODE) |
1955 | error = posix_acl_chmod(inode, inode->i_mode); | |
1956 | } | |
b3b94faa | 1957 | |
a91ea69f | 1958 | out: |
b3b94faa DT |
1959 | if (!error) |
1960 | mark_inode_dirty(inode); | |
ab9bbda0 | 1961 | gfs2_glock_dq_uninit(&i_gh); |
b3b94faa DT |
1962 | return error; |
1963 | } | |
1964 | ||
1965 | /** | |
1966 | * gfs2_getattr - Read out an inode's attributes | |
a528d35e | 1967 | * @path: Object to query |
b3b94faa | 1968 | * @stat: The inode's stats |
a528d35e DH |
1969 | * @request_mask: Mask of STATX_xxx flags indicating the caller's interests |
1970 | * @flags: AT_STATX_xxx setting | |
b3b94faa | 1971 | * |
dcf3dd85 SW |
1972 | * This may be called from the VFS directly, or from within GFS2 with the |
1973 | * inode locked, so we look to see if the glock is already locked and only | |
1974 | * lock the glock if its not already been done. Note that its the NFS | |
1975 | * readdirplus operation which causes this to be called (from filldir) | |
1976 | * with the glock already held. | |
1977 | * | |
b3b94faa DT |
1978 | * Returns: errno |
1979 | */ | |
1980 | ||
a528d35e DH |
1981 | static int gfs2_getattr(const struct path *path, struct kstat *stat, |
1982 | u32 request_mask, unsigned int flags) | |
b3b94faa | 1983 | { |
a528d35e | 1984 | struct inode *inode = d_inode(path->dentry); |
feaa7bba | 1985 | struct gfs2_inode *ip = GFS2_I(inode); |
b3b94faa | 1986 | struct gfs2_holder gh; |
b2623c2f | 1987 | u32 gfsflags; |
b3b94faa DT |
1988 | int error; |
1989 | ||
6df9f9a2 | 1990 | gfs2_holder_mark_uninitialized(&gh); |
7afd88d9 | 1991 | if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) { |
2e60d768 BM |
1992 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); |
1993 | if (error) | |
1994 | return error; | |
b3b94faa DT |
1995 | } |
1996 | ||
b2623c2f AG |
1997 | gfsflags = ip->i_diskflags; |
1998 | if (gfsflags & GFS2_DIF_APPENDONLY) | |
1999 | stat->attributes |= STATX_ATTR_APPEND; | |
2000 | if (gfsflags & GFS2_DIF_IMMUTABLE) | |
2001 | stat->attributes |= STATX_ATTR_IMMUTABLE; | |
2002 | ||
2003 | stat->attributes_mask |= (STATX_ATTR_APPEND | | |
2004 | STATX_ATTR_COMPRESSED | | |
2005 | STATX_ATTR_ENCRYPTED | | |
2006 | STATX_ATTR_IMMUTABLE | | |
2007 | STATX_ATTR_NODUMP); | |
2008 | ||
dcf3dd85 | 2009 | generic_fillattr(inode, stat); |
b2623c2f | 2010 | |
6df9f9a2 | 2011 | if (gfs2_holder_initialized(&gh)) |
dcf3dd85 SW |
2012 | gfs2_glock_dq_uninit(&gh); |
2013 | ||
2014 | return 0; | |
b3b94faa DT |
2015 | } |
2016 | ||
aac1a55b BP |
2017 | const struct iomap_ops gfs2_iomap_ops = { |
2018 | .iomap_begin = gfs2_iomap_begin, | |
2019 | }; | |
2020 | ||
e9079cce SW |
2021 | static int gfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, |
2022 | u64 start, u64 len) | |
2023 | { | |
2024 | struct gfs2_inode *ip = GFS2_I(inode); | |
2025 | struct gfs2_holder gh; | |
2026 | int ret; | |
2027 | ||
aac1a55b | 2028 | inode_lock_shared(inode); |
e9079cce SW |
2029 | |
2030 | ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh); | |
2031 | if (ret) | |
2032 | goto out; | |
2033 | ||
aac1a55b | 2034 | ret = iomap_fiemap(inode, fieinfo, start, len, &gfs2_iomap_ops); |
e9079cce SW |
2035 | |
2036 | gfs2_glock_dq_uninit(&gh); | |
aac1a55b | 2037 | |
e9079cce | 2038 | out: |
aac1a55b | 2039 | inode_unlock_shared(inode); |
e9079cce SW |
2040 | return ret; |
2041 | } | |
2042 | ||
3a27411c AG |
2043 | loff_t gfs2_seek_data(struct file *file, loff_t offset) |
2044 | { | |
2045 | struct inode *inode = file->f_mapping->host; | |
2046 | struct gfs2_inode *ip = GFS2_I(inode); | |
2047 | struct gfs2_holder gh; | |
2048 | loff_t ret; | |
2049 | ||
2050 | inode_lock_shared(inode); | |
2051 | ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh); | |
2052 | if (!ret) | |
2053 | ret = iomap_seek_data(inode, offset, &gfs2_iomap_ops); | |
2054 | gfs2_glock_dq_uninit(&gh); | |
2055 | inode_unlock_shared(inode); | |
2056 | ||
2057 | if (ret < 0) | |
2058 | return ret; | |
2059 | return vfs_setpos(file, ret, inode->i_sb->s_maxbytes); | |
2060 | } | |
2061 | ||
2062 | loff_t gfs2_seek_hole(struct file *file, loff_t offset) | |
2063 | { | |
2064 | struct inode *inode = file->f_mapping->host; | |
2065 | struct gfs2_inode *ip = GFS2_I(inode); | |
2066 | struct gfs2_holder gh; | |
2067 | loff_t ret; | |
2068 | ||
2069 | inode_lock_shared(inode); | |
2070 | ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh); | |
2071 | if (!ret) | |
2072 | ret = iomap_seek_hole(inode, offset, &gfs2_iomap_ops); | |
2073 | gfs2_glock_dq_uninit(&gh); | |
2074 | inode_unlock_shared(inode); | |
2075 | ||
2076 | if (ret < 0) | |
2077 | return ret; | |
2078 | return vfs_setpos(file, ret, inode->i_sb->s_maxbytes); | |
2079 | } | |
2080 | ||
92e1d5be | 2081 | const struct inode_operations gfs2_file_iops = { |
e6305c43 | 2082 | .permission = gfs2_permission, |
b3b94faa DT |
2083 | .setattr = gfs2_setattr, |
2084 | .getattr = gfs2_getattr, | |
b3b94faa | 2085 | .listxattr = gfs2_listxattr, |
e9079cce | 2086 | .fiemap = gfs2_fiemap, |
4e34e719 | 2087 | .get_acl = gfs2_get_acl, |
e01580bf | 2088 | .set_acl = gfs2_set_acl, |
b3b94faa DT |
2089 | }; |
2090 | ||
92e1d5be | 2091 | const struct inode_operations gfs2_dir_iops = { |
b3b94faa DT |
2092 | .create = gfs2_create, |
2093 | .lookup = gfs2_lookup, | |
2094 | .link = gfs2_link, | |
2095 | .unlink = gfs2_unlink, | |
2096 | .symlink = gfs2_symlink, | |
2097 | .mkdir = gfs2_mkdir, | |
855d23ce | 2098 | .rmdir = gfs2_unlink, |
b3b94faa | 2099 | .mknod = gfs2_mknod, |
2773bf00 | 2100 | .rename = gfs2_rename2, |
e6305c43 | 2101 | .permission = gfs2_permission, |
b3b94faa DT |
2102 | .setattr = gfs2_setattr, |
2103 | .getattr = gfs2_getattr, | |
b3b94faa | 2104 | .listxattr = gfs2_listxattr, |
e9079cce | 2105 | .fiemap = gfs2_fiemap, |
4e34e719 | 2106 | .get_acl = gfs2_get_acl, |
e01580bf | 2107 | .set_acl = gfs2_set_acl, |
6d4ade98 | 2108 | .atomic_open = gfs2_atomic_open, |
b3b94faa DT |
2109 | }; |
2110 | ||
92e1d5be | 2111 | const struct inode_operations gfs2_symlink_iops = { |
6b255391 | 2112 | .get_link = gfs2_get_link, |
e6305c43 | 2113 | .permission = gfs2_permission, |
b3b94faa DT |
2114 | .setattr = gfs2_setattr, |
2115 | .getattr = gfs2_getattr, | |
b3b94faa | 2116 | .listxattr = gfs2_listxattr, |
e9079cce | 2117 | .fiemap = gfs2_fiemap, |
b3b94faa DT |
2118 | }; |
2119 |