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7336d0e6 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
b3b94faa DT |
2 | /* |
3 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. | |
f2741d98 | 4 | * Copyright (C) 2004-2011 Red Hat, Inc. All rights reserved. |
b3b94faa DT |
5 | */ |
6 | ||
b3b94faa DT |
7 | #include <linux/slab.h> |
8 | #include <linux/spinlock.h> | |
9 | #include <linux/completion.h> | |
10 | #include <linux/buffer_head.h> | |
11 | #include <linux/namei.h> | |
b3b94faa | 12 | #include <linux/mm.h> |
5b825c3a | 13 | #include <linux/cred.h> |
b3b94faa DT |
14 | #include <linux/xattr.h> |
15 | #include <linux/posix_acl.h> | |
5c676f6d | 16 | #include <linux/gfs2_ondisk.h> |
71b86f56 | 17 | #include <linux/crc32.h> |
aac1a55b | 18 | #include <linux/iomap.h> |
194c011f | 19 | #include <linux/security.h> |
10c5db28 | 20 | #include <linux/fiemap.h> |
7c0f6ba6 | 21 | #include <linux/uaccess.h> |
b3b94faa DT |
22 | |
23 | #include "gfs2.h" | |
5c676f6d | 24 | #include "incore.h" |
b3b94faa DT |
25 | #include "acl.h" |
26 | #include "bmap.h" | |
27 | #include "dir.h" | |
307cf6e6 | 28 | #include "xattr.h" |
b3b94faa DT |
29 | #include "glock.h" |
30 | #include "inode.h" | |
31 | #include "meta_io.h" | |
b3b94faa DT |
32 | #include "quota.h" |
33 | #include "rgrp.h" | |
34 | #include "trans.h" | |
5c676f6d | 35 | #include "util.h" |
b2760583 | 36 | #include "super.h" |
194c011f SW |
37 | #include "glops.h" |
38 | ||
e3a77eeb AG |
39 | static const struct inode_operations gfs2_file_iops; |
40 | static const struct inode_operations gfs2_dir_iops; | |
41 | static const struct inode_operations gfs2_symlink_iops; | |
42 | ||
cda9dd42 | 43 | static int iget_test(struct inode *inode, void *opaque) |
194c011f | 44 | { |
cda9dd42 AG |
45 | u64 no_addr = *(u64 *)opaque; |
46 | ||
47 | return GFS2_I(inode)->i_no_addr == no_addr; | |
48 | } | |
49 | ||
50 | static int iget_set(struct inode *inode, void *opaque) | |
51 | { | |
52 | u64 no_addr = *(u64 *)opaque; | |
53 | ||
54 | GFS2_I(inode)->i_no_addr = no_addr; | |
55 | inode->i_ino = no_addr; | |
56 | return 0; | |
57 | } | |
58 | ||
3ce37b2c AG |
59 | static struct inode *gfs2_iget(struct super_block *sb, u64 no_addr) |
60 | { | |
61 | struct inode *inode; | |
62 | ||
63 | repeat: | |
cda9dd42 | 64 | inode = iget5_locked(sb, no_addr, iget_test, iget_set, &no_addr); |
3ce37b2c AG |
65 | if (!inode) |
66 | return inode; | |
67 | if (is_bad_inode(inode)) { | |
68 | iput(inode); | |
69 | goto repeat; | |
70 | } | |
3ce37b2c | 71 | return inode; |
194c011f SW |
72 | } |
73 | ||
74 | /** | |
75 | * gfs2_set_iop - Sets inode operations | |
76 | * @inode: The inode with correct i_mode filled in | |
77 | * | |
78 | * GFS2 lookup code fills in vfs inode contents based on info obtained | |
79 | * from directory entry inside gfs2_inode_lookup(). | |
80 | */ | |
81 | ||
82 | static void gfs2_set_iop(struct inode *inode) | |
83 | { | |
84 | struct gfs2_sbd *sdp = GFS2_SB(inode); | |
85 | umode_t mode = inode->i_mode; | |
86 | ||
87 | if (S_ISREG(mode)) { | |
88 | inode->i_op = &gfs2_file_iops; | |
89 | if (gfs2_localflocks(sdp)) | |
90 | inode->i_fop = &gfs2_file_fops_nolock; | |
91 | else | |
92 | inode->i_fop = &gfs2_file_fops; | |
93 | } else if (S_ISDIR(mode)) { | |
94 | inode->i_op = &gfs2_dir_iops; | |
95 | if (gfs2_localflocks(sdp)) | |
96 | inode->i_fop = &gfs2_dir_fops_nolock; | |
97 | else | |
98 | inode->i_fop = &gfs2_dir_fops; | |
99 | } else if (S_ISLNK(mode)) { | |
100 | inode->i_op = &gfs2_symlink_iops; | |
101 | } else { | |
102 | inode->i_op = &gfs2_file_iops; | |
103 | init_special_inode(inode, inode->i_mode, inode->i_rdev); | |
104 | } | |
105 | } | |
106 | ||
107 | /** | |
108 | * gfs2_inode_lookup - Lookup an inode | |
109 | * @sb: The super block | |
194c011f | 110 | * @type: The type of the inode |
3ce37b2c AG |
111 | * @no_addr: The inode number |
112 | * @no_formal_ino: The inode generation number | |
113 | * @blktype: Requested block type (GFS2_BLKST_DINODE or GFS2_BLKST_UNLINKED; | |
61b91cfd | 114 | * GFS2_BLKST_FREE to indicate not to verify) |
3ce37b2c AG |
115 | * |
116 | * If @type is DT_UNKNOWN, the inode type is fetched from disk. | |
117 | * | |
118 | * If @blktype is anything other than GFS2_BLKST_FREE (which is used as a | |
119 | * placeholder because it doesn't otherwise make sense), the on-disk block type | |
120 | * is verified to be @blktype. | |
194c011f | 121 | * |
b66648ad AG |
122 | * When @no_formal_ino is non-zero, this function will return ERR_PTR(-ESTALE) |
123 | * if it detects that @no_formal_ino doesn't match the actual inode generation | |
124 | * number. However, it doesn't always know unless @type is DT_UNKNOWN. | |
125 | * | |
194c011f SW |
126 | * Returns: A VFS inode, or an error |
127 | */ | |
128 | ||
129 | struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned int type, | |
3ce37b2c AG |
130 | u64 no_addr, u64 no_formal_ino, |
131 | unsigned int blktype) | |
194c011f SW |
132 | { |
133 | struct inode *inode; | |
134 | struct gfs2_inode *ip; | |
135 | struct gfs2_glock *io_gl = NULL; | |
3ce37b2c | 136 | struct gfs2_holder i_gh; |
194c011f SW |
137 | int error; |
138 | ||
6df9f9a2 | 139 | gfs2_holder_mark_uninitialized(&i_gh); |
3ce37b2c | 140 | inode = gfs2_iget(sb, no_addr); |
194c011f | 141 | if (!inode) |
ac3beb6a | 142 | return ERR_PTR(-ENOMEM); |
194c011f | 143 | |
e97321fa | 144 | ip = GFS2_I(inode); |
e97321fa | 145 | |
194c011f SW |
146 | if (inode->i_state & I_NEW) { |
147 | struct gfs2_sbd *sdp = GFS2_SB(inode); | |
194c011f SW |
148 | |
149 | error = gfs2_glock_get(sdp, no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl); | |
150 | if (unlikely(error)) | |
151 | goto fail; | |
4fd1a579 | 152 | flush_delayed_work(&ip->i_gl->gl_work); |
194c011f SW |
153 | |
154 | error = gfs2_glock_get(sdp, no_addr, &gfs2_iopen_glops, CREATE, &io_gl); | |
155 | if (unlikely(error)) | |
40e7e86e | 156 | goto fail; |
dd0ecf54 AG |
157 | if (blktype != GFS2_BLKST_UNLINKED) |
158 | gfs2_cancel_delete_work(io_gl); | |
194c011f | 159 | |
3ce37b2c AG |
160 | if (type == DT_UNKNOWN || blktype != GFS2_BLKST_FREE) { |
161 | /* | |
162 | * The GL_SKIP flag indicates to skip reading the inode | |
163 | * block. We read the inode with gfs2_inode_refresh | |
164 | * after possibly checking the block type. | |
165 | */ | |
166 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, | |
167 | GL_SKIP, &i_gh); | |
168 | if (error) | |
40e7e86e | 169 | goto fail; |
3ce37b2c | 170 | |
b66648ad AG |
171 | error = -ESTALE; |
172 | if (no_formal_ino && | |
173 | gfs2_inode_already_deleted(ip->i_gl, no_formal_ino)) | |
174 | goto fail; | |
175 | ||
3ce37b2c AG |
176 | if (blktype != GFS2_BLKST_FREE) { |
177 | error = gfs2_check_blk_type(sdp, no_addr, | |
178 | blktype); | |
179 | if (error) | |
40e7e86e | 180 | goto fail; |
3ce37b2c AG |
181 | } |
182 | } | |
183 | ||
4d7c18c7 | 184 | glock_set_object(ip->i_gl, ip); |
194c011f SW |
185 | set_bit(GIF_INVALID, &ip->i_flags); |
186 | error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh); | |
187 | if (unlikely(error)) | |
40e7e86e | 188 | goto fail; |
4fd1a579 | 189 | glock_set_object(ip->i_iopen_gh.gh_gl, ip); |
194c011f SW |
190 | gfs2_glock_put(io_gl); |
191 | io_gl = NULL; | |
192 | ||
2b0fb353 AG |
193 | /* Lowest possible timestamp; will be overwritten in gfs2_dinode_in. */ |
194 | inode->i_atime.tv_sec = 1LL << (8 * sizeof(inode->i_atime.tv_sec) - 1); | |
195 | inode->i_atime.tv_nsec = 0; | |
196 | ||
194c011f SW |
197 | if (type == DT_UNKNOWN) { |
198 | /* Inode glock must be locked already */ | |
199 | error = gfs2_inode_refresh(GFS2_I(inode)); | |
200 | if (error) | |
40e7e86e | 201 | goto fail; |
194c011f | 202 | } else { |
2b0fb353 | 203 | ip->i_no_formal_ino = no_formal_ino; |
194c011f SW |
204 | inode->i_mode = DT2IF(type); |
205 | } | |
206 | ||
b66648ad AG |
207 | if (gfs2_holder_initialized(&i_gh)) |
208 | gfs2_glock_dq_uninit(&i_gh); | |
209 | ||
194c011f | 210 | gfs2_set_iop(inode); |
b66648ad | 211 | } |
332f51d7 | 212 | |
b66648ad AG |
213 | if (no_formal_ino && ip->i_no_formal_ino && |
214 | no_formal_ino != ip->i_no_formal_ino) { | |
5902f4dd | 215 | error = -ESTALE; |
b66648ad AG |
216 | if (inode->i_state & I_NEW) |
217 | goto fail; | |
218 | iput(inode); | |
5902f4dd | 219 | return ERR_PTR(error); |
194c011f SW |
220 | } |
221 | ||
b66648ad AG |
222 | if (inode->i_state & I_NEW) |
223 | unlock_new_inode(inode); | |
224 | ||
194c011f SW |
225 | return inode; |
226 | ||
40e7e86e | 227 | fail: |
194c011f SW |
228 | if (io_gl) |
229 | gfs2_glock_put(io_gl); | |
6df9f9a2 | 230 | if (gfs2_holder_initialized(&i_gh)) |
3ce37b2c | 231 | gfs2_glock_dq_uninit(&i_gh); |
194c011f SW |
232 | iget_failed(inode); |
233 | return ERR_PTR(error); | |
234 | } | |
235 | ||
6bdcadea AG |
236 | /** |
237 | * gfs2_lookup_by_inum - look up an inode by inode number | |
238 | * @sdp: The super block | |
239 | * @no_addr: The inode number | |
240 | * @no_formal_ino: The inode generation number (0 for any) | |
241 | * @blktype: Requested block type (see gfs2_inode_lookup) | |
242 | */ | |
194c011f | 243 | struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr, |
6bdcadea | 244 | u64 no_formal_ino, unsigned int blktype) |
194c011f SW |
245 | { |
246 | struct super_block *sb = sdp->sd_vfs; | |
3ce37b2c | 247 | struct inode *inode; |
194c011f SW |
248 | int error; |
249 | ||
b66648ad AG |
250 | inode = gfs2_inode_lookup(sb, DT_UNKNOWN, no_addr, no_formal_ino, |
251 | blktype); | |
194c011f | 252 | if (IS_ERR(inode)) |
3ce37b2c | 253 | return inode; |
194c011f | 254 | |
194c011f | 255 | if (no_formal_ino) { |
194c011f SW |
256 | error = -EIO; |
257 | if (GFS2_I(inode)->i_diskflags & GFS2_DIF_SYSTEM) | |
258 | goto fail_iput; | |
194c011f | 259 | } |
3ce37b2c | 260 | return inode; |
194c011f | 261 | |
194c011f SW |
262 | fail_iput: |
263 | iput(inode); | |
3ce37b2c | 264 | return ERR_PTR(error); |
194c011f SW |
265 | } |
266 | ||
267 | ||
268 | struct inode *gfs2_lookup_simple(struct inode *dip, const char *name) | |
269 | { | |
270 | struct qstr qstr; | |
271 | struct inode *inode; | |
272 | gfs2_str2qstr(&qstr, name); | |
273 | inode = gfs2_lookupi(dip, &qstr, 1); | |
274 | /* gfs2_lookupi has inconsistent callers: vfs | |
275 | * related routines expect NULL for no entry found, | |
276 | * gfs2_lookup_simple callers expect ENOENT | |
277 | * and do not check for NULL. | |
278 | */ | |
279 | if (inode == NULL) | |
280 | return ERR_PTR(-ENOENT); | |
281 | else | |
282 | return inode; | |
283 | } | |
284 | ||
285 | ||
286 | /** | |
287 | * gfs2_lookupi - Look up a filename in a directory and return its inode | |
288 | * @d_gh: An initialized holder for the directory glock | |
289 | * @name: The name of the inode to look for | |
290 | * @is_root: If 1, ignore the caller's permissions | |
291 | * @i_gh: An uninitialized holder for the new inode glock | |
292 | * | |
293 | * This can be called via the VFS filldir function when NFS is doing | |
294 | * a readdirplus and the inode which its intending to stat isn't | |
295 | * already in cache. In this case we must not take the directory glock | |
296 | * again, since the readdir call will have already taken that lock. | |
297 | * | |
298 | * Returns: errno | |
299 | */ | |
300 | ||
301 | struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name, | |
302 | int is_root) | |
303 | { | |
304 | struct super_block *sb = dir->i_sb; | |
305 | struct gfs2_inode *dip = GFS2_I(dir); | |
306 | struct gfs2_holder d_gh; | |
307 | int error = 0; | |
308 | struct inode *inode = NULL; | |
194c011f | 309 | |
6df9f9a2 | 310 | gfs2_holder_mark_uninitialized(&d_gh); |
194c011f SW |
311 | if (!name->len || name->len > GFS2_FNAMESIZE) |
312 | return ERR_PTR(-ENAMETOOLONG); | |
313 | ||
314 | if ((name->len == 1 && memcmp(name->name, ".", 1) == 0) || | |
315 | (name->len == 2 && memcmp(name->name, "..", 2) == 0 && | |
2b0143b5 | 316 | dir == d_inode(sb->s_root))) { |
194c011f SW |
317 | igrab(dir); |
318 | return dir; | |
319 | } | |
320 | ||
321 | if (gfs2_glock_is_locked_by_me(dip->i_gl) == NULL) { | |
322 | error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh); | |
323 | if (error) | |
324 | return ERR_PTR(error); | |
194c011f SW |
325 | } |
326 | ||
327 | if (!is_root) { | |
10556cb2 | 328 | error = gfs2_permission(dir, MAY_EXEC); |
194c011f SW |
329 | if (error) |
330 | goto out; | |
331 | } | |
332 | ||
5a00f3cc | 333 | inode = gfs2_dir_search(dir, name, false); |
194c011f SW |
334 | if (IS_ERR(inode)) |
335 | error = PTR_ERR(inode); | |
336 | out: | |
6df9f9a2 | 337 | if (gfs2_holder_initialized(&d_gh)) |
194c011f SW |
338 | gfs2_glock_dq_uninit(&d_gh); |
339 | if (error == -ENOENT) | |
340 | return NULL; | |
341 | return inode ? inode : ERR_PTR(error); | |
342 | } | |
343 | ||
344 | /** | |
345 | * create_ok - OK to create a new on-disk inode here? | |
346 | * @dip: Directory in which dinode is to be created | |
347 | * @name: Name of new dinode | |
348 | * @mode: | |
349 | * | |
350 | * Returns: errno | |
351 | */ | |
352 | ||
353 | static int create_ok(struct gfs2_inode *dip, const struct qstr *name, | |
175a4eb7 | 354 | umode_t mode) |
194c011f SW |
355 | { |
356 | int error; | |
357 | ||
10556cb2 | 358 | error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC); |
194c011f SW |
359 | if (error) |
360 | return error; | |
361 | ||
362 | /* Don't create entries in an unlinked directory */ | |
363 | if (!dip->i_inode.i_nlink) | |
364 | return -ENOENT; | |
365 | ||
194c011f SW |
366 | if (dip->i_entries == (u32)-1) |
367 | return -EFBIG; | |
368 | if (S_ISDIR(mode) && dip->i_inode.i_nlink == (u32)-1) | |
369 | return -EMLINK; | |
370 | ||
371 | return 0; | |
372 | } | |
373 | ||
c9aecf73 SW |
374 | static void munge_mode_uid_gid(const struct gfs2_inode *dip, |
375 | struct inode *inode) | |
194c011f SW |
376 | { |
377 | if (GFS2_SB(&dip->i_inode)->sd_args.ar_suiddir && | |
6b24c0d2 EB |
378 | (dip->i_inode.i_mode & S_ISUID) && |
379 | !uid_eq(dip->i_inode.i_uid, GLOBAL_ROOT_UID)) { | |
c9aecf73 SW |
380 | if (S_ISDIR(inode->i_mode)) |
381 | inode->i_mode |= S_ISUID; | |
6b24c0d2 | 382 | else if (!uid_eq(dip->i_inode.i_uid, current_fsuid())) |
c9aecf73 SW |
383 | inode->i_mode &= ~07111; |
384 | inode->i_uid = dip->i_inode.i_uid; | |
194c011f | 385 | } else |
c9aecf73 | 386 | inode->i_uid = current_fsuid(); |
194c011f SW |
387 | |
388 | if (dip->i_inode.i_mode & S_ISGID) { | |
c9aecf73 SW |
389 | if (S_ISDIR(inode->i_mode)) |
390 | inode->i_mode |= S_ISGID; | |
391 | inode->i_gid = dip->i_inode.i_gid; | |
194c011f | 392 | } else |
c9aecf73 | 393 | inode->i_gid = current_fsgid(); |
194c011f SW |
394 | } |
395 | ||
b2c8b3ea | 396 | static int alloc_dinode(struct gfs2_inode *ip, u32 flags, unsigned *dblocks) |
194c011f | 397 | { |
c9aecf73 | 398 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b2c8b3ea | 399 | struct gfs2_alloc_parms ap = { .target = *dblocks, .aflags = flags, }; |
194c011f SW |
400 | int error; |
401 | ||
b8fbf471 | 402 | error = gfs2_quota_lock_check(ip, &ap); |
194c011f SW |
403 | if (error) |
404 | goto out; | |
405 | ||
7b9cff46 | 406 | error = gfs2_inplace_reserve(ip, &ap); |
fd4b4e04 SW |
407 | if (error) |
408 | goto out_quota; | |
409 | ||
b2c8b3ea | 410 | error = gfs2_trans_begin(sdp, (*dblocks * RES_RG_BIT) + RES_STATFS + RES_QUOTA, 0); |
194c011f SW |
411 | if (error) |
412 | goto out_ipreserv; | |
413 | ||
b2c8b3ea | 414 | error = gfs2_alloc_blocks(ip, &ip->i_no_addr, dblocks, 1, &ip->i_generation); |
c9aecf73 SW |
415 | ip->i_no_formal_ino = ip->i_generation; |
416 | ip->i_inode.i_ino = ip->i_no_addr; | |
417 | ip->i_goal = ip->i_no_addr; | |
194c011f SW |
418 | |
419 | gfs2_trans_end(sdp); | |
420 | ||
421 | out_ipreserv: | |
c9aecf73 | 422 | gfs2_inplace_release(ip); |
fd4b4e04 SW |
423 | out_quota: |
424 | gfs2_quota_unlock(ip); | |
194c011f | 425 | out: |
194c011f SW |
426 | return error; |
427 | } | |
428 | ||
f2741d98 SW |
429 | static void gfs2_init_dir(struct buffer_head *dibh, |
430 | const struct gfs2_inode *parent) | |
e2d0a13b SW |
431 | { |
432 | struct gfs2_dinode *di = (struct gfs2_dinode *)dibh->b_data; | |
433 | struct gfs2_dirent *dent = (struct gfs2_dirent *)(di+1); | |
434 | ||
435 | gfs2_qstr2dirent(&gfs2_qdot, GFS2_DIRENT_SIZE(gfs2_qdot.len), dent); | |
436 | dent->de_inum = di->di_num; /* already GFS2 endian */ | |
437 | dent->de_type = cpu_to_be16(DT_DIR); | |
438 | ||
439 | dent = (struct gfs2_dirent *)((char*)dent + GFS2_DIRENT_SIZE(1)); | |
440 | gfs2_qstr2dirent(&gfs2_qdotdot, dibh->b_size - GFS2_DIRENT_SIZE(1) - sizeof(struct gfs2_dinode), dent); | |
441 | gfs2_inum_out(parent, dent); | |
442 | dent->de_type = cpu_to_be16(DT_DIR); | |
443 | ||
444 | } | |
445 | ||
b2c8b3ea SW |
446 | /** |
447 | * gfs2_init_xattr - Initialise an xattr block for a new inode | |
448 | * @ip: The inode in question | |
449 | * | |
450 | * This sets up an empty xattr block for a new inode, ready to | |
451 | * take any ACLs, LSM xattrs, etc. | |
452 | */ | |
453 | ||
454 | static void gfs2_init_xattr(struct gfs2_inode *ip) | |
455 | { | |
456 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); | |
457 | struct buffer_head *bh; | |
458 | struct gfs2_ea_header *ea; | |
459 | ||
460 | bh = gfs2_meta_new(ip->i_gl, ip->i_eattr); | |
461 | gfs2_trans_add_meta(ip->i_gl, bh); | |
462 | gfs2_metatype_set(bh, GFS2_METATYPE_EA, GFS2_FORMAT_EA); | |
463 | gfs2_buffer_clear_tail(bh, sizeof(struct gfs2_meta_header)); | |
464 | ||
465 | ea = GFS2_EA_BH2FIRST(bh); | |
466 | ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize); | |
467 | ea->ea_type = GFS2_EATYPE_UNUSED; | |
468 | ea->ea_flags = GFS2_EAFLAG_LAST; | |
469 | ||
470 | brelse(bh); | |
471 | } | |
472 | ||
194c011f SW |
473 | /** |
474 | * init_dinode - Fill in a new dinode structure | |
f2741d98 | 475 | * @dip: The directory this inode is being created in |
c9aecf73 | 476 | * @ip: The inode |
f2741d98 | 477 | * @symname: The symlink destination (if a symlink) |
f2741d98 | 478 | * @bhp: The buffer head (returned to caller) |
194c011f SW |
479 | * |
480 | */ | |
481 | ||
c9aecf73 | 482 | static void init_dinode(struct gfs2_inode *dip, struct gfs2_inode *ip, |
79ba7480 | 483 | const char *symname) |
194c011f | 484 | { |
194c011f SW |
485 | struct gfs2_dinode *di; |
486 | struct buffer_head *dibh; | |
194c011f | 487 | |
c9aecf73 | 488 | dibh = gfs2_meta_new(ip->i_gl, ip->i_no_addr); |
350a9b0a | 489 | gfs2_trans_add_meta(ip->i_gl, dibh); |
194c011f | 490 | di = (struct gfs2_dinode *)dibh->b_data; |
79ba7480 | 491 | gfs2_dinode_out(ip, di); |
194c011f | 492 | |
c9aecf73 SW |
493 | di->di_major = cpu_to_be32(MAJOR(ip->i_inode.i_rdev)); |
494 | di->di_minor = cpu_to_be32(MINOR(ip->i_inode.i_rdev)); | |
194c011f | 495 | di->__pad1 = 0; |
194c011f SW |
496 | di->__pad2 = 0; |
497 | di->__pad3 = 0; | |
194c011f | 498 | memset(&di->__pad4, 0, sizeof(di->__pad4)); |
194c011f | 499 | memset(&di->di_reserved, 0, sizeof(di->di_reserved)); |
79ba7480 | 500 | gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode)); |
160b4026 | 501 | |
c9aecf73 | 502 | switch(ip->i_inode.i_mode & S_IFMT) { |
160b4026 | 503 | case S_IFDIR: |
e2d0a13b | 504 | gfs2_init_dir(dibh, dip); |
160b4026 SW |
505 | break; |
506 | case S_IFLNK: | |
c9aecf73 | 507 | memcpy(dibh->b_data + sizeof(struct gfs2_dinode), symname, ip->i_inode.i_size); |
160b4026 | 508 | break; |
e2d0a13b SW |
509 | } |
510 | ||
194c011f | 511 | set_buffer_uptodate(dibh); |
79ba7480 | 512 | brelse(dibh); |
194c011f SW |
513 | } |
514 | ||
534cf9ca SW |
515 | /** |
516 | * gfs2_trans_da_blocks - Calculate number of blocks to link inode | |
517 | * @dip: The directory we are linking into | |
518 | * @da: The dir add information | |
519 | * @nr_inodes: The number of inodes involved | |
520 | * | |
521 | * This calculate the number of blocks we need to reserve in a | |
522 | * transaction to link @nr_inodes into a directory. In most cases | |
523 | * @nr_inodes will be 2 (the directory plus the inode being linked in) | |
524 | * but in case of rename, 4 may be required. | |
525 | * | |
526 | * Returns: Number of blocks | |
527 | */ | |
528 | ||
529 | static unsigned gfs2_trans_da_blks(const struct gfs2_inode *dip, | |
530 | const struct gfs2_diradd *da, | |
531 | unsigned nr_inodes) | |
532 | { | |
533 | return da->nr_blocks + gfs2_rg_blocks(dip, da->nr_blocks) + | |
534 | (nr_inodes * RES_DINODE) + RES_QUOTA + RES_STATFS; | |
535 | } | |
536 | ||
194c011f | 537 | static int link_dinode(struct gfs2_inode *dip, const struct qstr *name, |
3c1c0ae1 | 538 | struct gfs2_inode *ip, struct gfs2_diradd *da) |
194c011f SW |
539 | { |
540 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); | |
3c1c0ae1 | 541 | struct gfs2_alloc_parms ap = { .target = da->nr_blocks, }; |
194c011f SW |
542 | int error; |
543 | ||
3c1c0ae1 | 544 | if (da->nr_blocks) { |
b8fbf471 | 545 | error = gfs2_quota_lock_check(dip, &ap); |
194c011f SW |
546 | if (error) |
547 | goto fail_quota_locks; | |
548 | ||
7b9cff46 | 549 | error = gfs2_inplace_reserve(dip, &ap); |
194c011f SW |
550 | if (error) |
551 | goto fail_quota_locks; | |
552 | ||
534cf9ca | 553 | error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, da, 2), 0); |
194c011f SW |
554 | if (error) |
555 | goto fail_ipreserv; | |
556 | } else { | |
557 | error = gfs2_trans_begin(sdp, RES_LEAF + 2 * RES_DINODE, 0); | |
558 | if (error) | |
559 | goto fail_quota_locks; | |
560 | } | |
561 | ||
2b47dad8 | 562 | error = gfs2_dir_add(&dip->i_inode, name, ip, da); |
194c011f | 563 | |
194c011f | 564 | gfs2_trans_end(sdp); |
194c011f | 565 | fail_ipreserv: |
fd4b4e04 | 566 | gfs2_inplace_release(dip); |
194c011f SW |
567 | fail_quota_locks: |
568 | gfs2_quota_unlock(dip); | |
194c011f SW |
569 | return error; |
570 | } | |
571 | ||
46cc1e5f | 572 | static int gfs2_initxattrs(struct inode *inode, const struct xattr *xattr_array, |
9d8f13ba | 573 | void *fs_info) |
194c011f | 574 | { |
9d8f13ba MZ |
575 | const struct xattr *xattr; |
576 | int err = 0; | |
577 | ||
578 | for (xattr = xattr_array; xattr->name != NULL; xattr++) { | |
579 | err = __gfs2_xattr_set(inode, xattr->name, xattr->value, | |
580 | xattr->value_len, 0, | |
581 | GFS2_EATYPE_SECURITY); | |
582 | if (err < 0) | |
583 | break; | |
194c011f | 584 | } |
194c011f SW |
585 | return err; |
586 | } | |
b3b94faa | 587 | |
194c011f | 588 | /** |
f2741d98 SW |
589 | * gfs2_create_inode - Create a new inode |
590 | * @dir: The parent directory | |
591 | * @dentry: The new dentry | |
6d4ade98 | 592 | * @file: If non-NULL, the file which is being opened |
f2741d98 SW |
593 | * @mode: The permissions on the new inode |
594 | * @dev: For device nodes, this is the device number | |
595 | * @symname: For symlinks, this is the link destination | |
596 | * @size: The initial size of the inode (ignored for directories) | |
194c011f | 597 | * |
f2741d98 | 598 | * Returns: 0 on success, or error code |
194c011f SW |
599 | */ |
600 | ||
f2741d98 | 601 | static int gfs2_create_inode(struct inode *dir, struct dentry *dentry, |
6d4ade98 | 602 | struct file *file, |
175a4eb7 | 603 | umode_t mode, dev_t dev, const char *symname, |
b452a458 | 604 | unsigned int size, int excl) |
194c011f | 605 | { |
f2741d98 | 606 | const struct qstr *name = &dentry->d_name; |
e01580bf | 607 | struct posix_acl *default_acl, *acl; |
f2741d98 | 608 | struct gfs2_holder ghs[2]; |
194c011f | 609 | struct inode *inode = NULL; |
8e2e0047 | 610 | struct gfs2_inode *dip = GFS2_I(dir), *ip; |
194c011f | 611 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); |
a55a47a3 | 612 | struct gfs2_glock *io_gl; |
783013c0 | 613 | int error, free_vfs_inode = 1; |
9dbe9610 | 614 | u32 aflags = 0; |
b2c8b3ea | 615 | unsigned blocks = 1; |
19aeb5a6 | 616 | struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, }; |
194c011f SW |
617 | |
618 | if (!name->len || name->len > GFS2_FNAMESIZE) | |
f2741d98 | 619 | return -ENAMETOOLONG; |
194c011f | 620 | |
2fba46a0 | 621 | error = gfs2_qa_get(dip); |
0a305e49 BP |
622 | if (error) |
623 | return error; | |
624 | ||
fd4b4e04 SW |
625 | error = gfs2_rindex_update(sdp); |
626 | if (error) | |
2fba46a0 | 627 | goto fail; |
fd4b4e04 | 628 | |
f2741d98 | 629 | error = gfs2_glock_nq_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); |
194c011f SW |
630 | if (error) |
631 | goto fail; | |
e0b62e21 | 632 | gfs2_holder_mark_uninitialized(ghs + 1); |
194c011f SW |
633 | |
634 | error = create_ok(dip, name, mode); | |
5a00f3cc SW |
635 | if (error) |
636 | goto fail_gunlock; | |
637 | ||
638 | inode = gfs2_dir_search(dir, &dentry->d_name, !S_ISREG(mode) || excl); | |
639 | error = PTR_ERR(inode); | |
640 | if (!IS_ERR(inode)) { | |
571a4b57 AV |
641 | if (S_ISDIR(inode->i_mode)) { |
642 | iput(inode); | |
643 | inode = ERR_PTR(-EISDIR); | |
644 | goto fail_gunlock; | |
645 | } | |
44bb31ba | 646 | d_instantiate(dentry, inode); |
6d4ade98 | 647 | error = 0; |
0d0d1107 | 648 | if (file) { |
44bb31ba | 649 | if (S_ISREG(inode->i_mode)) |
be12af3e | 650 | error = finish_open(file, dentry, gfs2_open_common); |
44bb31ba AV |
651 | else |
652 | error = finish_no_open(file, NULL); | |
6d4ade98 | 653 | } |
9a63edd1 | 654 | gfs2_glock_dq_uninit(ghs); |
2297ab61 | 655 | goto fail; |
5a00f3cc | 656 | } else if (error != -ENOENT) { |
194c011f | 657 | goto fail_gunlock; |
5a00f3cc | 658 | } |
194c011f | 659 | |
3c1c0ae1 | 660 | error = gfs2_diradd_alloc_required(dir, name, &da); |
fd4b4e04 SW |
661 | if (error < 0) |
662 | goto fail_gunlock; | |
663 | ||
c9aecf73 | 664 | inode = new_inode(sdp->sd_vfs); |
fd4b4e04 SW |
665 | error = -ENOMEM; |
666 | if (!inode) | |
667 | goto fail_gunlock; | |
668 | ||
e01580bf CH |
669 | error = posix_acl_create(dir, &mode, &default_acl, &acl); |
670 | if (error) | |
783013c0 | 671 | goto fail_gunlock; |
e01580bf | 672 | |
c9aecf73 | 673 | ip = GFS2_I(inode); |
2fba46a0 | 674 | error = gfs2_qa_get(ip); |
194c011f | 675 | if (error) |
e01580bf | 676 | goto fail_free_acls; |
c9aecf73 | 677 | |
c9aecf73 | 678 | inode->i_mode = mode; |
79ba7480 | 679 | set_nlink(inode, S_ISDIR(mode) ? 2 : 1); |
c9aecf73 SW |
680 | inode->i_rdev = dev; |
681 | inode->i_size = size; | |
078cd827 | 682 | inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode); |
c9aecf73 | 683 | munge_mode_uid_gid(dip, inode); |
00a158be | 684 | check_and_update_goal(dip); |
c9aecf73 | 685 | ip->i_goal = dip->i_goal; |
28fb3027 SW |
686 | ip->i_diskflags = 0; |
687 | ip->i_eattr = 0; | |
688 | ip->i_height = 0; | |
689 | ip->i_depth = 0; | |
690 | ip->i_entries = 0; | |
cc963a11 | 691 | ip->i_no_addr = 0; /* Temporarily zero until real addr is assigned */ |
28fb3027 SW |
692 | |
693 | switch(mode & S_IFMT) { | |
694 | case S_IFREG: | |
695 | if ((dip->i_diskflags & GFS2_DIF_INHERIT_JDATA) || | |
696 | gfs2_tune_get(sdp, gt_new_files_jdata)) | |
697 | ip->i_diskflags |= GFS2_DIF_JDATA; | |
698 | gfs2_set_aops(inode); | |
699 | break; | |
700 | case S_IFDIR: | |
701 | ip->i_diskflags |= (dip->i_diskflags & GFS2_DIF_INHERIT_JDATA); | |
702 | ip->i_diskflags |= GFS2_DIF_JDATA; | |
703 | ip->i_entries = 2; | |
704 | break; | |
705 | } | |
acc546fd AD |
706 | |
707 | /* Force SYSTEM flag on all files and subdirs of a SYSTEM directory */ | |
708 | if (dip->i_diskflags & GFS2_DIF_SYSTEM) | |
709 | ip->i_diskflags |= GFS2_DIF_SYSTEM; | |
710 | ||
28fb3027 | 711 | gfs2_set_inode_flags(inode); |
194c011f | 712 | |
2b0143b5 | 713 | if ((GFS2_I(d_inode(sdp->sd_root_dir)) == dip) || |
9dbe9610 SW |
714 | (dip->i_diskflags & GFS2_DIF_TOPDIR)) |
715 | aflags |= GFS2_AF_ORLOV; | |
716 | ||
b2c8b3ea SW |
717 | if (default_acl || acl) |
718 | blocks++; | |
719 | ||
720 | error = alloc_dinode(ip, aflags, &blocks); | |
194c011f | 721 | if (error) |
c9aecf73 | 722 | goto fail_free_inode; |
194c011f | 723 | |
b2c8b3ea SW |
724 | gfs2_set_inode_blocks(inode, blocks); |
725 | ||
c9aecf73 | 726 | error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl); |
194c011f | 727 | if (error) |
c9aecf73 | 728 | goto fail_free_inode; |
98e5a91a | 729 | flush_delayed_work(&ip->i_gl->gl_work); |
6f6597ba | 730 | glock_set_object(ip->i_gl, ip); |
98e5a91a | 731 | |
dd0ecf54 | 732 | error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_iopen_glops, CREATE, &io_gl); |
c9aecf73 SW |
733 | if (error) |
734 | goto fail_free_inode; | |
dd0ecf54 AG |
735 | gfs2_cancel_delete_work(io_gl); |
736 | glock_set_object(io_gl, ip); | |
737 | ||
738 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1); | |
739 | if (error) | |
740 | goto fail_gunlock2; | |
c9aecf73 | 741 | |
b2c8b3ea | 742 | error = gfs2_trans_begin(sdp, blocks, 0); |
c9aecf73 | 743 | if (error) |
dd0ecf54 | 744 | goto fail_gunlock2; |
194c011f | 745 | |
b2c8b3ea SW |
746 | if (blocks > 1) { |
747 | ip->i_eattr = ip->i_no_addr + 1; | |
748 | gfs2_init_xattr(ip); | |
749 | } | |
79ba7480 | 750 | init_dinode(dip, ip, symname); |
fd4b4e04 SW |
751 | gfs2_trans_end(sdp); |
752 | ||
c9aecf73 | 753 | error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh); |
ff7f4cb4 SW |
754 | if (error) |
755 | goto fail_gunlock2; | |
0a305e49 | 756 | |
c9aecf73 SW |
757 | gfs2_set_iop(inode); |
758 | insert_inode_hash(inode); | |
759 | ||
783013c0 BP |
760 | free_vfs_inode = 0; /* After this point, the inode is no longer |
761 | considered free. Any failures need to undo | |
762 | the gfs2 structures. */ | |
e01580bf | 763 | if (default_acl) { |
1a39ba99 | 764 | error = __gfs2_set_acl(inode, default_acl, ACL_TYPE_DEFAULT); |
6ff9b09e AG |
765 | if (error) |
766 | goto fail_gunlock3; | |
e01580bf | 767 | posix_acl_release(default_acl); |
6ff9b09e | 768 | default_acl = NULL; |
e01580bf CH |
769 | } |
770 | if (acl) { | |
6ff9b09e AG |
771 | error = __gfs2_set_acl(inode, acl, ACL_TYPE_ACCESS); |
772 | if (error) | |
773 | goto fail_gunlock3; | |
e01580bf | 774 | posix_acl_release(acl); |
6ff9b09e | 775 | acl = NULL; |
e01580bf CH |
776 | } |
777 | ||
f45dc26d BP |
778 | error = security_inode_init_security(&ip->i_inode, &dip->i_inode, name, |
779 | &gfs2_initxattrs, NULL); | |
194c011f | 780 | if (error) |
c9aecf73 | 781 | goto fail_gunlock3; |
194c011f | 782 | |
3c1c0ae1 | 783 | error = link_dinode(dip, name, ip, &da); |
194c011f | 784 | if (error) |
c9aecf73 | 785 | goto fail_gunlock3; |
194c011f | 786 | |
79ba7480 | 787 | mark_inode_dirty(inode); |
6d4ade98 | 788 | d_instantiate(dentry, inode); |
2c47c1be BP |
789 | /* After instantiate, errors should result in evict which will destroy |
790 | * both inode and iopen glocks properly. */ | |
c5bf8fef | 791 | if (file) { |
73a09dd9 | 792 | file->f_mode |= FMODE_CREATED; |
be12af3e | 793 | error = finish_open(file, dentry, gfs2_open_common); |
c5bf8fef | 794 | } |
28fb3027 | 795 | gfs2_glock_dq_uninit(ghs); |
2297ab61 | 796 | gfs2_qa_put(ip); |
28fb3027 | 797 | gfs2_glock_dq_uninit(ghs + 1); |
2c47c1be | 798 | gfs2_glock_put(io_gl); |
2297ab61 | 799 | gfs2_qa_put(dip); |
6d4ade98 | 800 | return error; |
194c011f | 801 | |
c9aecf73 | 802 | fail_gunlock3: |
9c1b2808 | 803 | glock_clear_object(io_gl, ip); |
783013c0 | 804 | gfs2_glock_dq_uninit(&ip->i_iopen_gh); |
194c011f | 805 | fail_gunlock2: |
dd0ecf54 | 806 | glock_clear_object(io_gl, ip); |
2c47c1be | 807 | gfs2_glock_put(io_gl); |
c9aecf73 | 808 | fail_free_inode: |
9c1b2808 BP |
809 | if (ip->i_gl) { |
810 | glock_clear_object(ip->i_gl, ip); | |
1a0b00d1 BP |
811 | if (free_vfs_inode) /* else evict will do the put for us */ |
812 | gfs2_glock_put(ip->i_gl); | |
9c1b2808 | 813 | } |
1595548f AG |
814 | gfs2_rs_delete(ip, NULL); |
815 | gfs2_qa_put(ip); | |
e01580bf | 816 | fail_free_acls: |
6ff9b09e AG |
817 | posix_acl_release(default_acl); |
818 | posix_acl_release(acl); | |
194c011f | 819 | fail_gunlock: |
2b47dad8 | 820 | gfs2_dir_no_add(&da); |
f2741d98 | 821 | gfs2_glock_dq_uninit(ghs); |
15a798f7 | 822 | if (!IS_ERR_OR_NULL(inode)) { |
79ba7480 | 823 | clear_nlink(inode); |
05978803 AD |
824 | if (!free_vfs_inode) |
825 | mark_inode_dirty(inode); | |
826 | set_bit(free_vfs_inode ? GIF_FREE_VFS_INODE : GIF_ALLOC_FAILED, | |
827 | &GFS2_I(inode)->i_flags); | |
40ac218f SW |
828 | iput(inode); |
829 | } | |
e0b62e21 AG |
830 | if (gfs2_holder_initialized(ghs + 1)) |
831 | gfs2_glock_dq_uninit(ghs + 1); | |
194c011f | 832 | fail: |
2fba46a0 | 833 | gfs2_qa_put(dip); |
f2741d98 | 834 | return error; |
194c011f | 835 | } |
f2741d98 | 836 | |
b3b94faa DT |
837 | /** |
838 | * gfs2_create - Create a file | |
839 | * @dir: The directory in which to create the file | |
840 | * @dentry: The dentry of the new file | |
841 | * @mode: The mode of the new file | |
842 | * | |
843 | * Returns: errno | |
844 | */ | |
845 | ||
846 | static int gfs2_create(struct inode *dir, struct dentry *dentry, | |
ebfc3b49 | 847 | umode_t mode, bool excl) |
b3b94faa | 848 | { |
b452a458 | 849 | return gfs2_create_inode(dir, dentry, NULL, S_IFREG | mode, 0, NULL, 0, excl); |
b3b94faa DT |
850 | } |
851 | ||
852 | /** | |
6d4ade98 | 853 | * __gfs2_lookup - Look up a filename in a directory and return its inode |
b3b94faa DT |
854 | * @dir: The directory inode |
855 | * @dentry: The dentry of the new inode | |
6d4ade98 | 856 | * @file: File to be opened |
b3b94faa | 857 | * |
b3b94faa DT |
858 | * |
859 | * Returns: errno | |
860 | */ | |
861 | ||
6d4ade98 | 862 | static struct dentry *__gfs2_lookup(struct inode *dir, struct dentry *dentry, |
b452a458 | 863 | struct file *file) |
b3b94faa | 864 | { |
6d4ade98 SW |
865 | struct inode *inode; |
866 | struct dentry *d; | |
867 | struct gfs2_holder gh; | |
868 | struct gfs2_glock *gl; | |
869 | int error; | |
870 | ||
871 | inode = gfs2_lookupi(dir, &dentry->d_name, 0); | |
7b7a9115 BC |
872 | if (inode == NULL) { |
873 | d_add(dentry, NULL); | |
6d4ade98 | 874 | return NULL; |
7b7a9115 | 875 | } |
6d4ade98 SW |
876 | if (IS_ERR(inode)) |
877 | return ERR_CAST(inode); | |
878 | ||
879 | gl = GFS2_I(inode)->i_gl; | |
880 | error = gfs2_glock_nq_init(gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); | |
881 | if (error) { | |
882 | iput(inode); | |
883 | return ERR_PTR(error); | |
9656b2c1 | 884 | } |
6d4ade98 SW |
885 | |
886 | d = d_splice_alias(inode, dentry); | |
d57b9c9a | 887 | if (IS_ERR(d)) { |
d57b9c9a BF |
888 | gfs2_glock_dq_uninit(&gh); |
889 | return d; | |
890 | } | |
6d4ade98 | 891 | if (file && S_ISREG(inode->i_mode)) |
be12af3e | 892 | error = finish_open(file, dentry, gfs2_open_common); |
6d4ade98 SW |
893 | |
894 | gfs2_glock_dq_uninit(&gh); | |
5ca1db41 MS |
895 | if (error) { |
896 | dput(d); | |
6d4ade98 | 897 | return ERR_PTR(error); |
5ca1db41 | 898 | } |
6d4ade98 SW |
899 | return d; |
900 | } | |
901 | ||
902 | static struct dentry *gfs2_lookup(struct inode *dir, struct dentry *dentry, | |
903 | unsigned flags) | |
904 | { | |
b452a458 | 905 | return __gfs2_lookup(dir, dentry, NULL); |
b3b94faa DT |
906 | } |
907 | ||
908 | /** | |
909 | * gfs2_link - Link to a file | |
910 | * @old_dentry: The inode to link | |
911 | * @dir: Add link to this directory | |
912 | * @dentry: The name of the link | |
913 | * | |
914 | * Link the inode in "old_dentry" into the directory "dir" with the | |
915 | * name in "dentry". | |
916 | * | |
917 | * Returns: errno | |
918 | */ | |
919 | ||
920 | static int gfs2_link(struct dentry *old_dentry, struct inode *dir, | |
921 | struct dentry *dentry) | |
922 | { | |
feaa7bba SW |
923 | struct gfs2_inode *dip = GFS2_I(dir); |
924 | struct gfs2_sbd *sdp = GFS2_SB(dir); | |
2b0143b5 | 925 | struct inode *inode = d_inode(old_dentry); |
feaa7bba | 926 | struct gfs2_inode *ip = GFS2_I(inode); |
b3b94faa | 927 | struct gfs2_holder ghs[2]; |
2baee03f | 928 | struct buffer_head *dibh; |
19aeb5a6 | 929 | struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, }; |
b3b94faa DT |
930 | int error; |
931 | ||
b60623c2 | 932 | if (S_ISDIR(inode->i_mode)) |
b3b94faa DT |
933 | return -EPERM; |
934 | ||
2fba46a0 | 935 | error = gfs2_qa_get(dip); |
0a305e49 BP |
936 | if (error) |
937 | return error; | |
938 | ||
b3b94faa DT |
939 | gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); |
940 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); | |
941 | ||
72dbf479 BP |
942 | error = gfs2_glock_nq(ghs); /* parent */ |
943 | if (error) | |
944 | goto out_parent; | |
945 | ||
946 | error = gfs2_glock_nq(ghs + 1); /* child */ | |
b3b94faa | 947 | if (error) |
72dbf479 | 948 | goto out_child; |
b3b94faa | 949 | |
d192a8e5 SW |
950 | error = -ENOENT; |
951 | if (inode->i_nlink == 0) | |
952 | goto out_gunlock; | |
953 | ||
10556cb2 | 954 | error = gfs2_permission(dir, MAY_WRITE | MAY_EXEC); |
b3b94faa DT |
955 | if (error) |
956 | goto out_gunlock; | |
957 | ||
dbb7cae2 | 958 | error = gfs2_dir_check(dir, &dentry->d_name, NULL); |
b3b94faa DT |
959 | switch (error) { |
960 | case -ENOENT: | |
961 | break; | |
962 | case 0: | |
963 | error = -EEXIST; | |
964 | default: | |
965 | goto out_gunlock; | |
966 | } | |
967 | ||
968 | error = -EINVAL; | |
4f56110a | 969 | if (!dip->i_inode.i_nlink) |
b3b94faa DT |
970 | goto out_gunlock; |
971 | error = -EFBIG; | |
ad6203f2 | 972 | if (dip->i_entries == (u32)-1) |
b3b94faa DT |
973 | goto out_gunlock; |
974 | error = -EPERM; | |
975 | if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) | |
976 | goto out_gunlock; | |
977 | error = -EINVAL; | |
4f56110a | 978 | if (!ip->i_inode.i_nlink) |
b3b94faa DT |
979 | goto out_gunlock; |
980 | error = -EMLINK; | |
4f56110a | 981 | if (ip->i_inode.i_nlink == (u32)-1) |
b3b94faa DT |
982 | goto out_gunlock; |
983 | ||
3c1c0ae1 | 984 | error = gfs2_diradd_alloc_required(dir, &dentry->d_name, &da); |
c752666c | 985 | if (error < 0) |
b3b94faa DT |
986 | goto out_gunlock; |
987 | ||
3c1c0ae1 SW |
988 | if (da.nr_blocks) { |
989 | struct gfs2_alloc_parms ap = { .target = da.nr_blocks, }; | |
b8fbf471 | 990 | error = gfs2_quota_lock_check(dip, &ap); |
b3b94faa | 991 | if (error) |
5407e242 | 992 | goto out_gunlock; |
b3b94faa | 993 | |
7b9cff46 | 994 | error = gfs2_inplace_reserve(dip, &ap); |
b3b94faa DT |
995 | if (error) |
996 | goto out_gunlock_q; | |
997 | ||
534cf9ca | 998 | error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, &da, 2), 0); |
b3b94faa DT |
999 | if (error) |
1000 | goto out_ipres; | |
1001 | } else { | |
1002 | error = gfs2_trans_begin(sdp, 2 * RES_DINODE + RES_LEAF, 0); | |
1003 | if (error) | |
1004 | goto out_ipres; | |
1005 | } | |
1006 | ||
2baee03f | 1007 | error = gfs2_meta_inode_buffer(ip, &dibh); |
b3b94faa DT |
1008 | if (error) |
1009 | goto out_end_trans; | |
1010 | ||
2b47dad8 | 1011 | error = gfs2_dir_add(dir, &dentry->d_name, ip, &da); |
2baee03f SW |
1012 | if (error) |
1013 | goto out_brelse; | |
1014 | ||
350a9b0a | 1015 | gfs2_trans_add_meta(ip->i_gl, dibh); |
2baee03f | 1016 | inc_nlink(&ip->i_inode); |
078cd827 | 1017 | ip->i_inode.i_ctime = current_time(&ip->i_inode); |
ab9bbda0 SW |
1018 | ihold(inode); |
1019 | d_instantiate(dentry, inode); | |
1020 | mark_inode_dirty(inode); | |
b3b94faa | 1021 | |
2baee03f SW |
1022 | out_brelse: |
1023 | brelse(dibh); | |
feaa7bba | 1024 | out_end_trans: |
b3b94faa | 1025 | gfs2_trans_end(sdp); |
feaa7bba | 1026 | out_ipres: |
3c1c0ae1 | 1027 | if (da.nr_blocks) |
b3b94faa | 1028 | gfs2_inplace_release(dip); |
feaa7bba | 1029 | out_gunlock_q: |
3c1c0ae1 | 1030 | if (da.nr_blocks) |
b3b94faa | 1031 | gfs2_quota_unlock(dip); |
feaa7bba | 1032 | out_gunlock: |
2b47dad8 | 1033 | gfs2_dir_no_add(&da); |
72dbf479 BP |
1034 | gfs2_glock_dq(ghs + 1); |
1035 | out_child: | |
1036 | gfs2_glock_dq(ghs); | |
1037 | out_parent: | |
2297ab61 | 1038 | gfs2_qa_put(dip); |
b3b94faa DT |
1039 | gfs2_holder_uninit(ghs); |
1040 | gfs2_holder_uninit(ghs + 1); | |
b3b94faa DT |
1041 | return error; |
1042 | } | |
1043 | ||
87ec2174 SW |
1044 | /* |
1045 | * gfs2_unlink_ok - check to see that a inode is still in a directory | |
1046 | * @dip: the directory | |
1047 | * @name: the name of the file | |
1048 | * @ip: the inode | |
1049 | * | |
1050 | * Assumes that the lock on (at least) @dip is held. | |
1051 | * | |
1052 | * Returns: 0 if the parent/child relationship is correct, errno if it isn't | |
1053 | */ | |
1054 | ||
1055 | static int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name, | |
1056 | const struct gfs2_inode *ip) | |
1057 | { | |
1058 | int error; | |
1059 | ||
1060 | if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode)) | |
1061 | return -EPERM; | |
1062 | ||
1063 | if ((dip->i_inode.i_mode & S_ISVTX) && | |
6b24c0d2 EB |
1064 | !uid_eq(dip->i_inode.i_uid, current_fsuid()) && |
1065 | !uid_eq(ip->i_inode.i_uid, current_fsuid()) && !capable(CAP_FOWNER)) | |
87ec2174 SW |
1066 | return -EPERM; |
1067 | ||
1068 | if (IS_APPEND(&dip->i_inode)) | |
1069 | return -EPERM; | |
1070 | ||
10556cb2 | 1071 | error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC); |
87ec2174 SW |
1072 | if (error) |
1073 | return error; | |
1074 | ||
37975f15 | 1075 | return gfs2_dir_check(&dip->i_inode, name, ip); |
87ec2174 SW |
1076 | } |
1077 | ||
b3b94faa | 1078 | /** |
855d23ce SW |
1079 | * gfs2_unlink_inode - Removes an inode from its parent dir and unlinks it |
1080 | * @dip: The parent directory | |
1081 | * @name: The name of the entry in the parent directory | |
855d23ce SW |
1082 | * @inode: The inode to be removed |
1083 | * | |
1084 | * Called with all the locks and in a transaction. This will only be | |
1085 | * called for a directory after it has been checked to ensure it is empty. | |
1086 | * | |
1087 | * Returns: 0 on success, or an error | |
1088 | */ | |
1089 | ||
1090 | static int gfs2_unlink_inode(struct gfs2_inode *dip, | |
4327a9bf | 1091 | const struct dentry *dentry) |
855d23ce | 1092 | { |
2b0143b5 | 1093 | struct inode *inode = d_inode(dentry); |
855d23ce SW |
1094 | struct gfs2_inode *ip = GFS2_I(inode); |
1095 | int error; | |
1096 | ||
1097 | error = gfs2_dir_del(dip, dentry); | |
1098 | if (error) | |
1099 | return error; | |
1100 | ||
1101 | ip->i_entries = 0; | |
078cd827 | 1102 | inode->i_ctime = current_time(inode); |
855d23ce SW |
1103 | if (S_ISDIR(inode->i_mode)) |
1104 | clear_nlink(inode); | |
1105 | else | |
1106 | drop_nlink(inode); | |
855d23ce SW |
1107 | mark_inode_dirty(inode); |
1108 | if (inode->i_nlink == 0) | |
1109 | gfs2_unlink_di(inode); | |
1110 | return 0; | |
1111 | } | |
1112 | ||
1113 | ||
1114 | /** | |
1115 | * gfs2_unlink - Unlink an inode (this does rmdir as well) | |
1116 | * @dir: The inode of the directory containing the inode to unlink | |
b3b94faa DT |
1117 | * @dentry: The file itself |
1118 | * | |
855d23ce SW |
1119 | * This routine uses the type of the inode as a flag to figure out |
1120 | * whether this is an unlink or an rmdir. | |
b3b94faa DT |
1121 | * |
1122 | * Returns: errno | |
1123 | */ | |
1124 | ||
1125 | static int gfs2_unlink(struct inode *dir, struct dentry *dentry) | |
1126 | { | |
feaa7bba SW |
1127 | struct gfs2_inode *dip = GFS2_I(dir); |
1128 | struct gfs2_sbd *sdp = GFS2_SB(dir); | |
2b0143b5 | 1129 | struct inode *inode = d_inode(dentry); |
855d23ce | 1130 | struct gfs2_inode *ip = GFS2_I(inode); |
ddee7608 RC |
1131 | struct gfs2_holder ghs[3]; |
1132 | struct gfs2_rgrpd *rgd; | |
5e2f7d61 BP |
1133 | int error; |
1134 | ||
1135 | error = gfs2_rindex_update(sdp); | |
1136 | if (error) | |
1137 | return error; | |
1138 | ||
1139 | error = -EROFS; | |
b3b94faa | 1140 | |
b3b94faa | 1141 | gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); |
ddee7608 | 1142 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); |
b3b94faa | 1143 | |
66fc061b | 1144 | rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr, 1); |
a365fbf3 | 1145 | if (!rgd) |
87654896 | 1146 | goto out_inodes; |
a365fbf3 | 1147 | |
ddee7608 RC |
1148 | gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2); |
1149 | ||
1150 | ||
8497a46e | 1151 | error = gfs2_glock_nq(ghs); /* parent */ |
b3b94faa | 1152 | if (error) |
8497a46e SW |
1153 | goto out_parent; |
1154 | ||
1155 | error = gfs2_glock_nq(ghs + 1); /* child */ | |
1156 | if (error) | |
1157 | goto out_child; | |
1158 | ||
d192a8e5 | 1159 | error = -ENOENT; |
855d23ce | 1160 | if (inode->i_nlink == 0) |
d192a8e5 SW |
1161 | goto out_rgrp; |
1162 | ||
855d23ce SW |
1163 | if (S_ISDIR(inode->i_mode)) { |
1164 | error = -ENOTEMPTY; | |
1165 | if (ip->i_entries > 2 || inode->i_nlink > 2) | |
1166 | goto out_rgrp; | |
1167 | } | |
1168 | ||
8497a46e SW |
1169 | error = gfs2_glock_nq(ghs + 2); /* rgrp */ |
1170 | if (error) | |
1171 | goto out_rgrp; | |
b3b94faa DT |
1172 | |
1173 | error = gfs2_unlink_ok(dip, &dentry->d_name, ip); | |
1174 | if (error) | |
72dbf479 | 1175 | goto out_gunlock; |
b3b94faa | 1176 | |
855d23ce | 1177 | error = gfs2_trans_begin(sdp, 2*RES_DINODE + 3*RES_LEAF + RES_RG_BIT, 0); |
855d23ce | 1178 | if (error) |
2eb5909d | 1179 | goto out_gunlock; |
b3b94faa | 1180 | |
4327a9bf | 1181 | error = gfs2_unlink_inode(dip, dentry); |
feaa7bba | 1182 | gfs2_trans_end(sdp); |
2eb5909d | 1183 | |
72dbf479 | 1184 | out_gunlock: |
8497a46e SW |
1185 | gfs2_glock_dq(ghs + 2); |
1186 | out_rgrp: | |
8497a46e SW |
1187 | gfs2_glock_dq(ghs + 1); |
1188 | out_child: | |
8497a46e SW |
1189 | gfs2_glock_dq(ghs); |
1190 | out_parent: | |
87654896 SW |
1191 | gfs2_holder_uninit(ghs + 2); |
1192 | out_inodes: | |
1193 | gfs2_holder_uninit(ghs + 1); | |
8497a46e | 1194 | gfs2_holder_uninit(ghs); |
b3b94faa DT |
1195 | return error; |
1196 | } | |
1197 | ||
1198 | /** | |
1199 | * gfs2_symlink - Create a symlink | |
1200 | * @dir: The directory to create the symlink in | |
1201 | * @dentry: The dentry to put the symlink in | |
1202 | * @symname: The thing which the link points to | |
1203 | * | |
1204 | * Returns: errno | |
1205 | */ | |
1206 | ||
1207 | static int gfs2_symlink(struct inode *dir, struct dentry *dentry, | |
1208 | const char *symname) | |
1209 | { | |
160b4026 | 1210 | unsigned int size; |
b3b94faa | 1211 | |
b3b94faa | 1212 | size = strlen(symname); |
235628c5 | 1213 | if (size >= gfs2_max_stuffed_size(GFS2_I(dir))) |
b3b94faa DT |
1214 | return -ENAMETOOLONG; |
1215 | ||
b452a458 | 1216 | return gfs2_create_inode(dir, dentry, NULL, S_IFLNK | S_IRWXUGO, 0, symname, size, 0); |
b3b94faa DT |
1217 | } |
1218 | ||
1219 | /** | |
1220 | * gfs2_mkdir - Make a directory | |
1221 | * @dir: The parent directory of the new one | |
1222 | * @dentry: The dentry of the new directory | |
1223 | * @mode: The mode of the new directory | |
1224 | * | |
1225 | * Returns: errno | |
1226 | */ | |
1227 | ||
18bb1db3 | 1228 | static int gfs2_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) |
b3b94faa | 1229 | { |
235628c5 | 1230 | unsigned dsize = gfs2_max_stuffed_size(GFS2_I(dir)); |
b452a458 | 1231 | return gfs2_create_inode(dir, dentry, NULL, S_IFDIR | mode, 0, NULL, dsize, 0); |
b3b94faa DT |
1232 | } |
1233 | ||
b3b94faa DT |
1234 | /** |
1235 | * gfs2_mknod - Make a special file | |
1236 | * @dir: The directory in which the special file will reside | |
1237 | * @dentry: The dentry of the special file | |
1238 | * @mode: The mode of the special file | |
f2741d98 | 1239 | * @dev: The device specification of the special file |
b3b94faa DT |
1240 | * |
1241 | */ | |
1242 | ||
1a67aafb | 1243 | static int gfs2_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, |
b3b94faa DT |
1244 | dev_t dev) |
1245 | { | |
b452a458 | 1246 | return gfs2_create_inode(dir, dentry, NULL, mode, dev, NULL, 0, 0); |
6d4ade98 SW |
1247 | } |
1248 | ||
1249 | /** | |
1250 | * gfs2_atomic_open - Atomically open a file | |
1251 | * @dir: The directory | |
1252 | * @dentry: The proposed new entry | |
1253 | * @file: The proposed new struct file | |
1254 | * @flags: open flags | |
1255 | * @mode: File mode | |
6d4ade98 SW |
1256 | * |
1257 | * Returns: error code or 0 for success | |
1258 | */ | |
1259 | ||
1260 | static int gfs2_atomic_open(struct inode *dir, struct dentry *dentry, | |
86fbca49 | 1261 | struct file *file, unsigned flags, |
44907d79 | 1262 | umode_t mode) |
6d4ade98 SW |
1263 | { |
1264 | struct dentry *d; | |
1265 | bool excl = !!(flags & O_EXCL); | |
1266 | ||
00699ad8 | 1267 | if (!d_in_lookup(dentry)) |
4d93bc3e AV |
1268 | goto skip_lookup; |
1269 | ||
b452a458 | 1270 | d = __gfs2_lookup(dir, dentry, file); |
6d4ade98 SW |
1271 | if (IS_ERR(d)) |
1272 | return PTR_ERR(d); | |
5ca1db41 MS |
1273 | if (d != NULL) |
1274 | dentry = d; | |
2b0143b5 | 1275 | if (d_really_is_positive(dentry)) { |
aad888f8 | 1276 | if (!(file->f_mode & FMODE_OPENED)) |
ec7d879c | 1277 | return finish_no_open(file, d); |
5ca1db41 | 1278 | dput(d); |
21039132 | 1279 | return excl && (flags & O_CREAT) ? -EEXIST : 0; |
6d4ade98 SW |
1280 | } |
1281 | ||
5ca1db41 | 1282 | BUG_ON(d != NULL); |
4d93bc3e AV |
1283 | |
1284 | skip_lookup: | |
6d4ade98 SW |
1285 | if (!(flags & O_CREAT)) |
1286 | return -ENOENT; | |
1287 | ||
b452a458 | 1288 | return gfs2_create_inode(dir, dentry, file, S_IFREG | mode, 0, NULL, 0, excl); |
b3b94faa DT |
1289 | } |
1290 | ||
0188d6c5 SW |
1291 | /* |
1292 | * gfs2_ok_to_move - check if it's ok to move a directory to another directory | |
1293 | * @this: move this | |
1294 | * @to: to here | |
1295 | * | |
1296 | * Follow @to back to the root and make sure we don't encounter @this | |
1297 | * Assumes we already hold the rename lock. | |
1298 | * | |
1299 | * Returns: errno | |
1300 | */ | |
1301 | ||
1302 | static int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to) | |
1303 | { | |
1304 | struct inode *dir = &to->i_inode; | |
1305 | struct super_block *sb = dir->i_sb; | |
1306 | struct inode *tmp; | |
0188d6c5 SW |
1307 | int error = 0; |
1308 | ||
0188d6c5 SW |
1309 | igrab(dir); |
1310 | ||
1311 | for (;;) { | |
1312 | if (dir == &this->i_inode) { | |
1313 | error = -EINVAL; | |
1314 | break; | |
1315 | } | |
2b0143b5 | 1316 | if (dir == d_inode(sb->s_root)) { |
0188d6c5 SW |
1317 | error = 0; |
1318 | break; | |
1319 | } | |
1320 | ||
8d123585 | 1321 | tmp = gfs2_lookupi(dir, &gfs2_qdotdot, 1); |
48f8f711 AD |
1322 | if (!tmp) { |
1323 | error = -ENOENT; | |
1324 | break; | |
1325 | } | |
0188d6c5 SW |
1326 | if (IS_ERR(tmp)) { |
1327 | error = PTR_ERR(tmp); | |
1328 | break; | |
1329 | } | |
1330 | ||
1331 | iput(dir); | |
1332 | dir = tmp; | |
1333 | } | |
1334 | ||
1335 | iput(dir); | |
1336 | ||
1337 | return error; | |
1338 | } | |
1339 | ||
a63b7bbc BM |
1340 | /** |
1341 | * update_moved_ino - Update an inode that's being moved | |
1342 | * @ip: The inode being moved | |
1343 | * @ndip: The parent directory of the new filename | |
1344 | * @dir_rename: True of ip is a directory | |
1345 | * | |
1346 | * Returns: errno | |
1347 | */ | |
1348 | ||
1349 | static int update_moved_ino(struct gfs2_inode *ip, struct gfs2_inode *ndip, | |
1350 | int dir_rename) | |
1351 | { | |
a63b7bbc BM |
1352 | if (dir_rename) |
1353 | return gfs2_dir_mvino(ip, &gfs2_qdotdot, ndip, DT_DIR); | |
1354 | ||
078cd827 | 1355 | ip->i_inode.i_ctime = current_time(&ip->i_inode); |
83998ccd | 1356 | mark_inode_dirty_sync(&ip->i_inode); |
a63b7bbc BM |
1357 | return 0; |
1358 | } | |
1359 | ||
1360 | ||
b3b94faa DT |
1361 | /** |
1362 | * gfs2_rename - Rename a file | |
1363 | * @odir: Parent directory of old file name | |
1364 | * @odentry: The old dentry of the file | |
1365 | * @ndir: Parent directory of new file name | |
1366 | * @ndentry: The new dentry of the file | |
1367 | * | |
1368 | * Returns: errno | |
1369 | */ | |
1370 | ||
1371 | static int gfs2_rename(struct inode *odir, struct dentry *odentry, | |
1372 | struct inode *ndir, struct dentry *ndentry) | |
1373 | { | |
feaa7bba SW |
1374 | struct gfs2_inode *odip = GFS2_I(odir); |
1375 | struct gfs2_inode *ndip = GFS2_I(ndir); | |
2b0143b5 | 1376 | struct gfs2_inode *ip = GFS2_I(d_inode(odentry)); |
b3b94faa | 1377 | struct gfs2_inode *nip = NULL; |
feaa7bba | 1378 | struct gfs2_sbd *sdp = GFS2_SB(odir); |
bc74aaef | 1379 | struct gfs2_holder ghs[4], r_gh, rd_gh; |
ddee7608 | 1380 | struct gfs2_rgrpd *nrgd; |
b3b94faa DT |
1381 | unsigned int num_gh; |
1382 | int dir_rename = 0; | |
19aeb5a6 | 1383 | struct gfs2_diradd da = { .nr_blocks = 0, .save_loc = 0, }; |
b3b94faa DT |
1384 | unsigned int x; |
1385 | int error; | |
1386 | ||
6df9f9a2 | 1387 | gfs2_holder_mark_uninitialized(&r_gh); |
bc74aaef | 1388 | gfs2_holder_mark_uninitialized(&rd_gh); |
2b0143b5 DH |
1389 | if (d_really_is_positive(ndentry)) { |
1390 | nip = GFS2_I(d_inode(ndentry)); | |
b3b94faa DT |
1391 | if (ip == nip) |
1392 | return 0; | |
1393 | } | |
1394 | ||
5e2f7d61 BP |
1395 | error = gfs2_rindex_update(sdp); |
1396 | if (error) | |
1397 | return error; | |
1398 | ||
2fba46a0 | 1399 | error = gfs2_qa_get(ndip); |
0a305e49 BP |
1400 | if (error) |
1401 | return error; | |
1402 | ||
0188d6c5 SW |
1403 | if (odip != ndip) { |
1404 | error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE, | |
1405 | 0, &r_gh); | |
b3b94faa DT |
1406 | if (error) |
1407 | goto out; | |
1408 | ||
0188d6c5 SW |
1409 | if (S_ISDIR(ip->i_inode.i_mode)) { |
1410 | dir_rename = 1; | |
a63b7bbc | 1411 | /* don't move a directory into its subdir */ |
0188d6c5 SW |
1412 | error = gfs2_ok_to_move(ip, ndip); |
1413 | if (error) | |
1414 | goto out_gunlock_r; | |
1415 | } | |
b3b94faa DT |
1416 | } |
1417 | ||
d9d1ca30 | 1418 | num_gh = 1; |
ad26967b | 1419 | gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs); |
d9d1ca30 | 1420 | if (odip != ndip) { |
ad26967b BP |
1421 | gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE,GL_ASYNC, |
1422 | ghs + num_gh); | |
d9d1ca30 SW |
1423 | num_gh++; |
1424 | } | |
ad26967b | 1425 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs + num_gh); |
d9d1ca30 | 1426 | num_gh++; |
b3b94faa | 1427 | |
d9d1ca30 | 1428 | if (nip) { |
ad26967b BP |
1429 | gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, |
1430 | ghs + num_gh); | |
d9d1ca30 SW |
1431 | num_gh++; |
1432 | } | |
b3b94faa | 1433 | |
72dbf479 BP |
1434 | for (x = 0; x < num_gh; x++) { |
1435 | error = gfs2_glock_nq(ghs + x); | |
1436 | if (error) | |
1437 | goto out_gunlock; | |
1438 | } | |
ad26967b BP |
1439 | error = gfs2_glock_async_wait(num_gh, ghs); |
1440 | if (error) | |
1441 | goto out_gunlock; | |
b3b94faa | 1442 | |
bc74aaef BP |
1443 | if (nip) { |
1444 | /* Grab the resource group glock for unlink flag twiddling. | |
1445 | * This is the case where the target dinode already exists | |
1446 | * so we unlink before doing the rename. | |
1447 | */ | |
1448 | nrgd = gfs2_blk2rgrpd(sdp, nip->i_no_addr, 1); | |
1449 | if (!nrgd) { | |
1450 | error = -ENOENT; | |
1451 | goto out_gunlock; | |
1452 | } | |
1453 | error = gfs2_glock_nq_init(nrgd->rd_gl, LM_ST_EXCLUSIVE, 0, | |
1454 | &rd_gh); | |
1455 | if (error) | |
1456 | goto out_gunlock; | |
1457 | } | |
1458 | ||
d192a8e5 SW |
1459 | error = -ENOENT; |
1460 | if (ip->i_inode.i_nlink == 0) | |
1461 | goto out_gunlock; | |
1462 | ||
b3b94faa DT |
1463 | /* Check out the old directory */ |
1464 | ||
1465 | error = gfs2_unlink_ok(odip, &odentry->d_name, ip); | |
1466 | if (error) | |
1467 | goto out_gunlock; | |
1468 | ||
1469 | /* Check out the new directory */ | |
1470 | ||
1471 | if (nip) { | |
1472 | error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip); | |
1473 | if (error) | |
1474 | goto out_gunlock; | |
1475 | ||
d192a8e5 SW |
1476 | if (nip->i_inode.i_nlink == 0) { |
1477 | error = -EAGAIN; | |
1478 | goto out_gunlock; | |
1479 | } | |
1480 | ||
b60623c2 | 1481 | if (S_ISDIR(nip->i_inode.i_mode)) { |
ad6203f2 | 1482 | if (nip->i_entries < 2) { |
94fb763b | 1483 | gfs2_consist_inode(nip); |
b3b94faa DT |
1484 | error = -EIO; |
1485 | goto out_gunlock; | |
1486 | } | |
ad6203f2 | 1487 | if (nip->i_entries > 2) { |
b3b94faa DT |
1488 | error = -ENOTEMPTY; |
1489 | goto out_gunlock; | |
1490 | } | |
1491 | } | |
1492 | } else { | |
10556cb2 | 1493 | error = gfs2_permission(ndir, MAY_WRITE | MAY_EXEC); |
b3b94faa DT |
1494 | if (error) |
1495 | goto out_gunlock; | |
1496 | ||
dbb7cae2 | 1497 | error = gfs2_dir_check(ndir, &ndentry->d_name, NULL); |
b3b94faa DT |
1498 | switch (error) { |
1499 | case -ENOENT: | |
1500 | error = 0; | |
1501 | break; | |
1502 | case 0: | |
1503 | error = -EEXIST; | |
1504 | default: | |
1505 | goto out_gunlock; | |
098b9c14 | 1506 | } |
b3b94faa DT |
1507 | |
1508 | if (odip != ndip) { | |
4f56110a | 1509 | if (!ndip->i_inode.i_nlink) { |
d192a8e5 | 1510 | error = -ENOENT; |
b3b94faa DT |
1511 | goto out_gunlock; |
1512 | } | |
ad6203f2 | 1513 | if (ndip->i_entries == (u32)-1) { |
b3b94faa DT |
1514 | error = -EFBIG; |
1515 | goto out_gunlock; | |
1516 | } | |
b60623c2 | 1517 | if (S_ISDIR(ip->i_inode.i_mode) && |
4f56110a | 1518 | ndip->i_inode.i_nlink == (u32)-1) { |
b3b94faa DT |
1519 | error = -EMLINK; |
1520 | goto out_gunlock; | |
1521 | } | |
1522 | } | |
1523 | } | |
1524 | ||
1525 | /* Check out the dir to be renamed */ | |
1526 | ||
1527 | if (dir_rename) { | |
2b0143b5 | 1528 | error = gfs2_permission(d_inode(odentry), MAY_WRITE); |
b3b94faa DT |
1529 | if (error) |
1530 | goto out_gunlock; | |
1531 | } | |
1532 | ||
3c1c0ae1 SW |
1533 | if (nip == NULL) { |
1534 | error = gfs2_diradd_alloc_required(ndir, &ndentry->d_name, &da); | |
1535 | if (error) | |
1536 | goto out_gunlock; | |
1537 | } | |
b3b94faa | 1538 | |
3c1c0ae1 SW |
1539 | if (da.nr_blocks) { |
1540 | struct gfs2_alloc_parms ap = { .target = da.nr_blocks, }; | |
b8fbf471 | 1541 | error = gfs2_quota_lock_check(ndip, &ap); |
b3b94faa | 1542 | if (error) |
5407e242 | 1543 | goto out_gunlock; |
b3b94faa | 1544 | |
7b9cff46 | 1545 | error = gfs2_inplace_reserve(ndip, &ap); |
b3b94faa DT |
1546 | if (error) |
1547 | goto out_gunlock_q; | |
1548 | ||
534cf9ca SW |
1549 | error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(ndip, &da, 4) + |
1550 | 4 * RES_LEAF + 4, 0); | |
b3b94faa DT |
1551 | if (error) |
1552 | goto out_ipreserv; | |
1553 | } else { | |
1554 | error = gfs2_trans_begin(sdp, 4 * RES_DINODE + | |
87d21e07 | 1555 | 5 * RES_LEAF + 4, 0); |
b3b94faa DT |
1556 | if (error) |
1557 | goto out_gunlock; | |
1558 | } | |
1559 | ||
1560 | /* Remove the target file, if it exists */ | |
1561 | ||
4327a9bf BP |
1562 | if (nip) |
1563 | error = gfs2_unlink_inode(ndip, ndentry); | |
b3b94faa | 1564 | |
a63b7bbc BM |
1565 | error = update_moved_ino(ip, ndip, dir_rename); |
1566 | if (error) | |
1567 | goto out_end_trans; | |
b3b94faa | 1568 | |
855d23ce | 1569 | error = gfs2_dir_del(odip, odentry); |
b3b94faa DT |
1570 | if (error) |
1571 | goto out_end_trans; | |
1572 | ||
2b47dad8 | 1573 | error = gfs2_dir_add(ndir, &ndentry->d_name, ip, &da); |
b3b94faa DT |
1574 | if (error) |
1575 | goto out_end_trans; | |
1576 | ||
feaa7bba | 1577 | out_end_trans: |
b3b94faa | 1578 | gfs2_trans_end(sdp); |
feaa7bba | 1579 | out_ipreserv: |
3c1c0ae1 | 1580 | if (da.nr_blocks) |
b3b94faa | 1581 | gfs2_inplace_release(ndip); |
feaa7bba | 1582 | out_gunlock_q: |
3c1c0ae1 | 1583 | if (da.nr_blocks) |
b3b94faa | 1584 | gfs2_quota_unlock(ndip); |
feaa7bba | 1585 | out_gunlock: |
2b47dad8 | 1586 | gfs2_dir_no_add(&da); |
bc74aaef BP |
1587 | if (gfs2_holder_initialized(&rd_gh)) |
1588 | gfs2_glock_dq_uninit(&rd_gh); | |
1589 | ||
72dbf479 | 1590 | while (x--) { |
ad26967b BP |
1591 | if (gfs2_holder_queued(ghs + x)) |
1592 | gfs2_glock_dq(ghs + x); | |
b3b94faa | 1593 | gfs2_holder_uninit(ghs + x); |
72dbf479 | 1594 | } |
feaa7bba | 1595 | out_gunlock_r: |
6df9f9a2 | 1596 | if (gfs2_holder_initialized(&r_gh)) |
b3b94faa | 1597 | gfs2_glock_dq_uninit(&r_gh); |
feaa7bba | 1598 | out: |
2fba46a0 | 1599 | gfs2_qa_put(ndip); |
b3b94faa DT |
1600 | return error; |
1601 | } | |
1602 | ||
a63b7bbc BM |
1603 | /** |
1604 | * gfs2_exchange - exchange two files | |
1605 | * @odir: Parent directory of old file name | |
1606 | * @odentry: The old dentry of the file | |
1607 | * @ndir: Parent directory of new file name | |
1608 | * @ndentry: The new dentry of the file | |
1609 | * @flags: The rename flags | |
1610 | * | |
1611 | * Returns: errno | |
1612 | */ | |
1613 | ||
1614 | static int gfs2_exchange(struct inode *odir, struct dentry *odentry, | |
1615 | struct inode *ndir, struct dentry *ndentry, | |
1616 | unsigned int flags) | |
1617 | { | |
1618 | struct gfs2_inode *odip = GFS2_I(odir); | |
1619 | struct gfs2_inode *ndip = GFS2_I(ndir); | |
1620 | struct gfs2_inode *oip = GFS2_I(odentry->d_inode); | |
1621 | struct gfs2_inode *nip = GFS2_I(ndentry->d_inode); | |
1622 | struct gfs2_sbd *sdp = GFS2_SB(odir); | |
ad26967b | 1623 | struct gfs2_holder ghs[4], r_gh; |
a63b7bbc BM |
1624 | unsigned int num_gh; |
1625 | unsigned int x; | |
1626 | umode_t old_mode = oip->i_inode.i_mode; | |
1627 | umode_t new_mode = nip->i_inode.i_mode; | |
1628 | int error; | |
1629 | ||
6df9f9a2 | 1630 | gfs2_holder_mark_uninitialized(&r_gh); |
a63b7bbc BM |
1631 | error = gfs2_rindex_update(sdp); |
1632 | if (error) | |
1633 | return error; | |
1634 | ||
1635 | if (odip != ndip) { | |
1636 | error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE, | |
1637 | 0, &r_gh); | |
1638 | if (error) | |
1639 | goto out; | |
1640 | ||
1641 | if (S_ISDIR(old_mode)) { | |
1642 | /* don't move a directory into its subdir */ | |
1643 | error = gfs2_ok_to_move(oip, ndip); | |
1644 | if (error) | |
1645 | goto out_gunlock_r; | |
1646 | } | |
1647 | ||
1648 | if (S_ISDIR(new_mode)) { | |
1649 | /* don't move a directory into its subdir */ | |
1650 | error = gfs2_ok_to_move(nip, odip); | |
1651 | if (error) | |
1652 | goto out_gunlock_r; | |
1653 | } | |
1654 | } | |
1655 | ||
1656 | num_gh = 1; | |
ad26967b | 1657 | gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs); |
a63b7bbc | 1658 | if (odip != ndip) { |
ad26967b BP |
1659 | gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, |
1660 | ghs + num_gh); | |
a63b7bbc BM |
1661 | num_gh++; |
1662 | } | |
ad26967b | 1663 | gfs2_holder_init(oip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs + num_gh); |
a63b7bbc BM |
1664 | num_gh++; |
1665 | ||
ad26967b | 1666 | gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs + num_gh); |
a63b7bbc BM |
1667 | num_gh++; |
1668 | ||
1669 | for (x = 0; x < num_gh; x++) { | |
1670 | error = gfs2_glock_nq(ghs + x); | |
1671 | if (error) | |
1672 | goto out_gunlock; | |
1673 | } | |
1674 | ||
ad26967b BP |
1675 | error = gfs2_glock_async_wait(num_gh, ghs); |
1676 | if (error) | |
1677 | goto out_gunlock; | |
1678 | ||
a63b7bbc BM |
1679 | error = -ENOENT; |
1680 | if (oip->i_inode.i_nlink == 0 || nip->i_inode.i_nlink == 0) | |
1681 | goto out_gunlock; | |
1682 | ||
1683 | error = gfs2_unlink_ok(odip, &odentry->d_name, oip); | |
1684 | if (error) | |
1685 | goto out_gunlock; | |
1686 | error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip); | |
1687 | if (error) | |
1688 | goto out_gunlock; | |
1689 | ||
1690 | if (S_ISDIR(old_mode)) { | |
1691 | error = gfs2_permission(odentry->d_inode, MAY_WRITE); | |
1692 | if (error) | |
1693 | goto out_gunlock; | |
1694 | } | |
1695 | if (S_ISDIR(new_mode)) { | |
1696 | error = gfs2_permission(ndentry->d_inode, MAY_WRITE); | |
1697 | if (error) | |
1698 | goto out_gunlock; | |
1699 | } | |
1700 | error = gfs2_trans_begin(sdp, 4 * RES_DINODE + 4 * RES_LEAF, 0); | |
1701 | if (error) | |
1702 | goto out_gunlock; | |
1703 | ||
1704 | error = update_moved_ino(oip, ndip, S_ISDIR(old_mode)); | |
1705 | if (error) | |
1706 | goto out_end_trans; | |
1707 | ||
1708 | error = update_moved_ino(nip, odip, S_ISDIR(new_mode)); | |
1709 | if (error) | |
1710 | goto out_end_trans; | |
1711 | ||
1712 | error = gfs2_dir_mvino(ndip, &ndentry->d_name, oip, | |
1713 | IF2DT(old_mode)); | |
1714 | if (error) | |
1715 | goto out_end_trans; | |
1716 | ||
1717 | error = gfs2_dir_mvino(odip, &odentry->d_name, nip, | |
1718 | IF2DT(new_mode)); | |
1719 | if (error) | |
1720 | goto out_end_trans; | |
1721 | ||
1722 | if (odip != ndip) { | |
1723 | if (S_ISDIR(new_mode) && !S_ISDIR(old_mode)) { | |
1724 | inc_nlink(&odip->i_inode); | |
1725 | drop_nlink(&ndip->i_inode); | |
1726 | } else if (S_ISDIR(old_mode) && !S_ISDIR(new_mode)) { | |
1727 | inc_nlink(&ndip->i_inode); | |
1728 | drop_nlink(&odip->i_inode); | |
1729 | } | |
1730 | } | |
1731 | mark_inode_dirty(&ndip->i_inode); | |
1732 | if (odip != ndip) | |
1733 | mark_inode_dirty(&odip->i_inode); | |
1734 | ||
1735 | out_end_trans: | |
1736 | gfs2_trans_end(sdp); | |
1737 | out_gunlock: | |
1738 | while (x--) { | |
ad26967b BP |
1739 | if (gfs2_holder_queued(ghs + x)) |
1740 | gfs2_glock_dq(ghs + x); | |
a63b7bbc BM |
1741 | gfs2_holder_uninit(ghs + x); |
1742 | } | |
1743 | out_gunlock_r: | |
6df9f9a2 | 1744 | if (gfs2_holder_initialized(&r_gh)) |
a63b7bbc BM |
1745 | gfs2_glock_dq_uninit(&r_gh); |
1746 | out: | |
1747 | return error; | |
1748 | } | |
1749 | ||
1750 | static int gfs2_rename2(struct inode *odir, struct dentry *odentry, | |
1751 | struct inode *ndir, struct dentry *ndentry, | |
1752 | unsigned int flags) | |
1753 | { | |
1754 | flags &= ~RENAME_NOREPLACE; | |
1755 | ||
1756 | if (flags & ~RENAME_EXCHANGE) | |
1757 | return -EINVAL; | |
1758 | ||
1759 | if (flags & RENAME_EXCHANGE) | |
1760 | return gfs2_exchange(odir, odentry, ndir, ndentry, flags); | |
1761 | ||
1762 | return gfs2_rename(odir, odentry, ndir, ndentry); | |
1763 | } | |
1764 | ||
536baf02 | 1765 | /** |
6b255391 | 1766 | * gfs2_get_link - Follow a symbolic link |
c177c2ac | 1767 | * @dentry: The dentry of the link |
6b255391 | 1768 | * @inode: The inode of the link |
fceef393 | 1769 | * @done: destructor for return value |
536baf02 | 1770 | * |
c177c2ac | 1771 | * This can handle symlinks of any size. |
536baf02 | 1772 | * |
c177c2ac | 1773 | * Returns: 0 on success or error code |
536baf02 SW |
1774 | */ |
1775 | ||
6b255391 | 1776 | static const char *gfs2_get_link(struct dentry *dentry, |
fceef393 AV |
1777 | struct inode *inode, |
1778 | struct delayed_call *done) | |
536baf02 | 1779 | { |
6b255391 | 1780 | struct gfs2_inode *ip = GFS2_I(inode); |
536baf02 SW |
1781 | struct gfs2_holder i_gh; |
1782 | struct buffer_head *dibh; | |
160b4026 | 1783 | unsigned int size; |
c177c2ac | 1784 | char *buf; |
536baf02 SW |
1785 | int error; |
1786 | ||
6b255391 AV |
1787 | if (!dentry) |
1788 | return ERR_PTR(-ECHILD); | |
1789 | ||
536baf02 SW |
1790 | gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh); |
1791 | error = gfs2_glock_nq(&i_gh); | |
1792 | if (error) { | |
1793 | gfs2_holder_uninit(&i_gh); | |
680baacb | 1794 | return ERR_PTR(error); |
536baf02 SW |
1795 | } |
1796 | ||
a2e0f799 SW |
1797 | size = (unsigned int)i_size_read(&ip->i_inode); |
1798 | if (size == 0) { | |
536baf02 | 1799 | gfs2_consist_inode(ip); |
c177c2ac | 1800 | buf = ERR_PTR(-EIO); |
536baf02 SW |
1801 | goto out; |
1802 | } | |
1803 | ||
1804 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
c177c2ac AV |
1805 | if (error) { |
1806 | buf = ERR_PTR(error); | |
536baf02 | 1807 | goto out; |
536baf02 SW |
1808 | } |
1809 | ||
160b4026 | 1810 | buf = kzalloc(size + 1, GFP_NOFS); |
c177c2ac AV |
1811 | if (!buf) |
1812 | buf = ERR_PTR(-ENOMEM); | |
1813 | else | |
160b4026 | 1814 | memcpy(buf, dibh->b_data + sizeof(struct gfs2_dinode), size); |
536baf02 SW |
1815 | brelse(dibh); |
1816 | out: | |
1817 | gfs2_glock_dq_uninit(&i_gh); | |
680baacb | 1818 | if (!IS_ERR(buf)) |
fceef393 | 1819 | set_delayed_call(done, kfree_link, buf); |
680baacb | 1820 | return buf; |
b3b94faa DT |
1821 | } |
1822 | ||
b3b94faa DT |
1823 | /** |
1824 | * gfs2_permission - | |
75d5cfbe SW |
1825 | * @inode: The inode |
1826 | * @mask: The mask to be tested | |
1827 | * @flags: Indicates whether this is an RCU path walk or not | |
b3b94faa | 1828 | * |
300c7d75 SW |
1829 | * This may be called from the VFS directly, or from within GFS2 with the |
1830 | * inode locked, so we look to see if the glock is already locked and only | |
1831 | * lock the glock if its not already been done. | |
1832 | * | |
b3b94faa DT |
1833 | * Returns: errno |
1834 | */ | |
1835 | ||
10556cb2 | 1836 | int gfs2_permission(struct inode *inode, int mask) |
b3b94faa | 1837 | { |
b74c79e9 | 1838 | struct gfs2_inode *ip; |
b3b94faa DT |
1839 | struct gfs2_holder i_gh; |
1840 | int error; | |
b74c79e9 | 1841 | |
6df9f9a2 | 1842 | gfs2_holder_mark_uninitialized(&i_gh); |
b74c79e9 | 1843 | ip = GFS2_I(inode); |
7afd88d9 | 1844 | if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) { |
2e60d768 BM |
1845 | if (mask & MAY_NOT_BLOCK) |
1846 | return -ECHILD; | |
1847 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh); | |
1848 | if (error) | |
1849 | return error; | |
300c7d75 | 1850 | } |
b3b94faa | 1851 | |
f58ba889 | 1852 | if ((mask & MAY_WRITE) && IS_IMMUTABLE(inode)) |
337684a1 | 1853 | error = -EPERM; |
f58ba889 | 1854 | else |
2830ba7f | 1855 | error = generic_permission(inode, mask); |
6df9f9a2 | 1856 | if (gfs2_holder_initialized(&i_gh)) |
b3b94faa | 1857 | gfs2_glock_dq_uninit(&i_gh); |
b3b94faa DT |
1858 | |
1859 | return error; | |
1860 | } | |
1861 | ||
ab9bbda0 | 1862 | static int __gfs2_setattr_simple(struct inode *inode, struct iattr *attr) |
194c011f | 1863 | { |
194c011f SW |
1864 | setattr_copy(inode, attr); |
1865 | mark_inode_dirty(inode); | |
194c011f SW |
1866 | return 0; |
1867 | } | |
1868 | ||
1869 | /** | |
1870 | * gfs2_setattr_simple - | |
1871 | * @ip: | |
1872 | * @attr: | |
1873 | * | |
1874 | * Returns: errno | |
1875 | */ | |
1876 | ||
ab9bbda0 | 1877 | int gfs2_setattr_simple(struct inode *inode, struct iattr *attr) |
194c011f SW |
1878 | { |
1879 | int error; | |
1880 | ||
1881 | if (current->journal_info) | |
ab9bbda0 | 1882 | return __gfs2_setattr_simple(inode, attr); |
194c011f | 1883 | |
ab9bbda0 | 1884 | error = gfs2_trans_begin(GFS2_SB(inode), RES_DINODE, 0); |
194c011f SW |
1885 | if (error) |
1886 | return error; | |
1887 | ||
ab9bbda0 SW |
1888 | error = __gfs2_setattr_simple(inode, attr); |
1889 | gfs2_trans_end(GFS2_SB(inode)); | |
194c011f SW |
1890 | return error; |
1891 | } | |
1892 | ||
b3b94faa DT |
1893 | static int setattr_chown(struct inode *inode, struct iattr *attr) |
1894 | { | |
feaa7bba SW |
1895 | struct gfs2_inode *ip = GFS2_I(inode); |
1896 | struct gfs2_sbd *sdp = GFS2_SB(inode); | |
7c06b5d6 EB |
1897 | kuid_t ouid, nuid; |
1898 | kgid_t ogid, ngid; | |
b3b94faa | 1899 | int error; |
b8fbf471 | 1900 | struct gfs2_alloc_parms ap; |
b3b94faa | 1901 | |
2933f925 SW |
1902 | ouid = inode->i_uid; |
1903 | ogid = inode->i_gid; | |
b3b94faa DT |
1904 | nuid = attr->ia_uid; |
1905 | ngid = attr->ia_gid; | |
1906 | ||
6b24c0d2 | 1907 | if (!(attr->ia_valid & ATTR_UID) || uid_eq(ouid, nuid)) |
f4108a60 | 1908 | ouid = nuid = NO_UID_QUOTA_CHANGE; |
6b24c0d2 | 1909 | if (!(attr->ia_valid & ATTR_GID) || gid_eq(ogid, ngid)) |
f4108a60 | 1910 | ogid = ngid = NO_GID_QUOTA_CHANGE; |
2fba46a0 | 1911 | error = gfs2_qa_get(ip); |
62e96cf8 | 1912 | if (error) |
2fba46a0 | 1913 | return error; |
62e96cf8 BP |
1914 | |
1915 | error = gfs2_rindex_update(sdp); | |
1916 | if (error) | |
1917 | goto out; | |
1918 | ||
1919 | error = gfs2_quota_lock(ip, nuid, ngid); | |
1920 | if (error) | |
1921 | goto out; | |
1922 | ||
b8fbf471 AD |
1923 | ap.target = gfs2_get_inode_blocks(&ip->i_inode); |
1924 | ||
6b24c0d2 EB |
1925 | if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) || |
1926 | !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) { | |
b8fbf471 | 1927 | error = gfs2_quota_check(ip, nuid, ngid, &ap); |
b3b94faa DT |
1928 | if (error) |
1929 | goto out_gunlock_q; | |
1930 | } | |
1931 | ||
1932 | error = gfs2_trans_begin(sdp, RES_DINODE + 2 * RES_QUOTA, 0); | |
1933 | if (error) | |
1934 | goto out_gunlock_q; | |
1935 | ||
ab9bbda0 | 1936 | error = gfs2_setattr_simple(inode, attr); |
b3b94faa DT |
1937 | if (error) |
1938 | goto out_end_trans; | |
1939 | ||
6b24c0d2 EB |
1940 | if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) || |
1941 | !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) { | |
39a72580 | 1942 | gfs2_quota_change(ip, -(s64)ap.target, ouid, ogid); |
b8fbf471 | 1943 | gfs2_quota_change(ip, ap.target, nuid, ngid); |
b3b94faa DT |
1944 | } |
1945 | ||
a91ea69f | 1946 | out_end_trans: |
b3b94faa | 1947 | gfs2_trans_end(sdp); |
a91ea69f | 1948 | out_gunlock_q: |
b3b94faa | 1949 | gfs2_quota_unlock(ip); |
62e96cf8 | 1950 | out: |
2fba46a0 | 1951 | gfs2_qa_put(ip); |
b3b94faa DT |
1952 | return error; |
1953 | } | |
1954 | ||
1955 | /** | |
1956 | * gfs2_setattr - Change attributes on an inode | |
1957 | * @dentry: The dentry which is changing | |
1958 | * @attr: The structure describing the change | |
1959 | * | |
1960 | * The VFS layer wants to change one or more of an inodes attributes. Write | |
1961 | * that change out to disk. | |
1962 | * | |
1963 | * Returns: errno | |
1964 | */ | |
1965 | ||
1966 | static int gfs2_setattr(struct dentry *dentry, struct iattr *attr) | |
1967 | { | |
2b0143b5 | 1968 | struct inode *inode = d_inode(dentry); |
feaa7bba | 1969 | struct gfs2_inode *ip = GFS2_I(inode); |
b3b94faa DT |
1970 | struct gfs2_holder i_gh; |
1971 | int error; | |
1972 | ||
2fba46a0 | 1973 | error = gfs2_qa_get(ip); |
0a305e49 BP |
1974 | if (error) |
1975 | return error; | |
1976 | ||
b3b94faa DT |
1977 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); |
1978 | if (error) | |
2fba46a0 | 1979 | goto out; |
b3b94faa DT |
1980 | |
1981 | error = -EPERM; | |
1982 | if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) | |
2fba46a0 | 1983 | goto error; |
b3b94faa | 1984 | |
31051c85 | 1985 | error = setattr_prepare(dentry, attr); |
b3b94faa | 1986 | if (error) |
2fba46a0 | 1987 | goto error; |
b3b94faa DT |
1988 | |
1989 | if (attr->ia_valid & ATTR_SIZE) | |
ff8f33c8 | 1990 | error = gfs2_setattr_size(inode, attr->ia_size); |
b3b94faa DT |
1991 | else if (attr->ia_valid & (ATTR_UID | ATTR_GID)) |
1992 | error = setattr_chown(inode, attr); | |
e01580bf | 1993 | else { |
ab9bbda0 | 1994 | error = gfs2_setattr_simple(inode, attr); |
e01580bf CH |
1995 | if (!error && attr->ia_valid & ATTR_MODE) |
1996 | error = posix_acl_chmod(inode, inode->i_mode); | |
1997 | } | |
b3b94faa | 1998 | |
2fba46a0 | 1999 | error: |
b3b94faa DT |
2000 | if (!error) |
2001 | mark_inode_dirty(inode); | |
ab9bbda0 | 2002 | gfs2_glock_dq_uninit(&i_gh); |
2fba46a0 BP |
2003 | out: |
2004 | gfs2_qa_put(ip); | |
b3b94faa DT |
2005 | return error; |
2006 | } | |
2007 | ||
2008 | /** | |
2009 | * gfs2_getattr - Read out an inode's attributes | |
a528d35e | 2010 | * @path: Object to query |
b3b94faa | 2011 | * @stat: The inode's stats |
a528d35e DH |
2012 | * @request_mask: Mask of STATX_xxx flags indicating the caller's interests |
2013 | * @flags: AT_STATX_xxx setting | |
b3b94faa | 2014 | * |
dcf3dd85 SW |
2015 | * This may be called from the VFS directly, or from within GFS2 with the |
2016 | * inode locked, so we look to see if the glock is already locked and only | |
2017 | * lock the glock if its not already been done. Note that its the NFS | |
2018 | * readdirplus operation which causes this to be called (from filldir) | |
2019 | * with the glock already held. | |
2020 | * | |
b3b94faa DT |
2021 | * Returns: errno |
2022 | */ | |
2023 | ||
a528d35e DH |
2024 | static int gfs2_getattr(const struct path *path, struct kstat *stat, |
2025 | u32 request_mask, unsigned int flags) | |
b3b94faa | 2026 | { |
a528d35e | 2027 | struct inode *inode = d_inode(path->dentry); |
feaa7bba | 2028 | struct gfs2_inode *ip = GFS2_I(inode); |
b3b94faa | 2029 | struct gfs2_holder gh; |
b2623c2f | 2030 | u32 gfsflags; |
b3b94faa DT |
2031 | int error; |
2032 | ||
6df9f9a2 | 2033 | gfs2_holder_mark_uninitialized(&gh); |
7afd88d9 | 2034 | if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) { |
2e60d768 BM |
2035 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); |
2036 | if (error) | |
2037 | return error; | |
b3b94faa DT |
2038 | } |
2039 | ||
b2623c2f AG |
2040 | gfsflags = ip->i_diskflags; |
2041 | if (gfsflags & GFS2_DIF_APPENDONLY) | |
2042 | stat->attributes |= STATX_ATTR_APPEND; | |
2043 | if (gfsflags & GFS2_DIF_IMMUTABLE) | |
2044 | stat->attributes |= STATX_ATTR_IMMUTABLE; | |
2045 | ||
2046 | stat->attributes_mask |= (STATX_ATTR_APPEND | | |
2047 | STATX_ATTR_COMPRESSED | | |
2048 | STATX_ATTR_ENCRYPTED | | |
2049 | STATX_ATTR_IMMUTABLE | | |
2050 | STATX_ATTR_NODUMP); | |
2051 | ||
dcf3dd85 | 2052 | generic_fillattr(inode, stat); |
b2623c2f | 2053 | |
6df9f9a2 | 2054 | if (gfs2_holder_initialized(&gh)) |
dcf3dd85 SW |
2055 | gfs2_glock_dq_uninit(&gh); |
2056 | ||
2057 | return 0; | |
b3b94faa DT |
2058 | } |
2059 | ||
e9079cce SW |
2060 | static int gfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, |
2061 | u64 start, u64 len) | |
2062 | { | |
2063 | struct gfs2_inode *ip = GFS2_I(inode); | |
2064 | struct gfs2_holder gh; | |
2065 | int ret; | |
2066 | ||
aac1a55b | 2067 | inode_lock_shared(inode); |
e9079cce SW |
2068 | |
2069 | ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh); | |
2070 | if (ret) | |
2071 | goto out; | |
2072 | ||
aac1a55b | 2073 | ret = iomap_fiemap(inode, fieinfo, start, len, &gfs2_iomap_ops); |
e9079cce SW |
2074 | |
2075 | gfs2_glock_dq_uninit(&gh); | |
aac1a55b | 2076 | |
e9079cce | 2077 | out: |
aac1a55b | 2078 | inode_unlock_shared(inode); |
e9079cce SW |
2079 | return ret; |
2080 | } | |
2081 | ||
3a27411c AG |
2082 | loff_t gfs2_seek_data(struct file *file, loff_t offset) |
2083 | { | |
2084 | struct inode *inode = file->f_mapping->host; | |
2085 | struct gfs2_inode *ip = GFS2_I(inode); | |
2086 | struct gfs2_holder gh; | |
2087 | loff_t ret; | |
2088 | ||
2089 | inode_lock_shared(inode); | |
2090 | ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh); | |
2091 | if (!ret) | |
2092 | ret = iomap_seek_data(inode, offset, &gfs2_iomap_ops); | |
2093 | gfs2_glock_dq_uninit(&gh); | |
2094 | inode_unlock_shared(inode); | |
2095 | ||
2096 | if (ret < 0) | |
2097 | return ret; | |
2098 | return vfs_setpos(file, ret, inode->i_sb->s_maxbytes); | |
2099 | } | |
2100 | ||
2101 | loff_t gfs2_seek_hole(struct file *file, loff_t offset) | |
2102 | { | |
2103 | struct inode *inode = file->f_mapping->host; | |
2104 | struct gfs2_inode *ip = GFS2_I(inode); | |
2105 | struct gfs2_holder gh; | |
2106 | loff_t ret; | |
2107 | ||
2108 | inode_lock_shared(inode); | |
2109 | ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh); | |
2110 | if (!ret) | |
2111 | ret = iomap_seek_hole(inode, offset, &gfs2_iomap_ops); | |
2112 | gfs2_glock_dq_uninit(&gh); | |
2113 | inode_unlock_shared(inode); | |
2114 | ||
2115 | if (ret < 0) | |
2116 | return ret; | |
2117 | return vfs_setpos(file, ret, inode->i_sb->s_maxbytes); | |
2118 | } | |
2119 | ||
82e938bd AG |
2120 | static int gfs2_update_time(struct inode *inode, struct timespec64 *time, |
2121 | int flags) | |
2122 | { | |
2123 | struct gfs2_inode *ip = GFS2_I(inode); | |
2124 | struct gfs2_glock *gl = ip->i_gl; | |
2125 | struct gfs2_holder *gh; | |
2126 | int error; | |
2127 | ||
2128 | gh = gfs2_glock_is_locked_by_me(gl); | |
2129 | if (gh && !gfs2_glock_is_held_excl(gl)) { | |
2130 | gfs2_glock_dq(gh); | |
2131 | gfs2_holder_reinit(LM_ST_EXCLUSIVE, 0, gh); | |
2132 | error = gfs2_glock_nq(gh); | |
2133 | if (error) | |
2134 | return error; | |
2135 | } | |
2136 | return generic_update_time(inode, time, flags); | |
2137 | } | |
2138 | ||
e3a77eeb | 2139 | static const struct inode_operations gfs2_file_iops = { |
e6305c43 | 2140 | .permission = gfs2_permission, |
b3b94faa DT |
2141 | .setattr = gfs2_setattr, |
2142 | .getattr = gfs2_getattr, | |
b3b94faa | 2143 | .listxattr = gfs2_listxattr, |
e9079cce | 2144 | .fiemap = gfs2_fiemap, |
4e34e719 | 2145 | .get_acl = gfs2_get_acl, |
e01580bf | 2146 | .set_acl = gfs2_set_acl, |
82e938bd | 2147 | .update_time = gfs2_update_time, |
b3b94faa DT |
2148 | }; |
2149 | ||
e3a77eeb | 2150 | static const struct inode_operations gfs2_dir_iops = { |
b3b94faa DT |
2151 | .create = gfs2_create, |
2152 | .lookup = gfs2_lookup, | |
2153 | .link = gfs2_link, | |
2154 | .unlink = gfs2_unlink, | |
2155 | .symlink = gfs2_symlink, | |
2156 | .mkdir = gfs2_mkdir, | |
855d23ce | 2157 | .rmdir = gfs2_unlink, |
b3b94faa | 2158 | .mknod = gfs2_mknod, |
2773bf00 | 2159 | .rename = gfs2_rename2, |
e6305c43 | 2160 | .permission = gfs2_permission, |
b3b94faa DT |
2161 | .setattr = gfs2_setattr, |
2162 | .getattr = gfs2_getattr, | |
b3b94faa | 2163 | .listxattr = gfs2_listxattr, |
e9079cce | 2164 | .fiemap = gfs2_fiemap, |
4e34e719 | 2165 | .get_acl = gfs2_get_acl, |
e01580bf | 2166 | .set_acl = gfs2_set_acl, |
82e938bd | 2167 | .update_time = gfs2_update_time, |
6d4ade98 | 2168 | .atomic_open = gfs2_atomic_open, |
b3b94faa DT |
2169 | }; |
2170 | ||
e3a77eeb | 2171 | static const struct inode_operations gfs2_symlink_iops = { |
6b255391 | 2172 | .get_link = gfs2_get_link, |
e6305c43 | 2173 | .permission = gfs2_permission, |
b3b94faa DT |
2174 | .setattr = gfs2_setattr, |
2175 | .getattr = gfs2_getattr, | |
b3b94faa | 2176 | .listxattr = gfs2_listxattr, |
e9079cce | 2177 | .fiemap = gfs2_fiemap, |
b3b94faa DT |
2178 | }; |
2179 |