Commit | Line | Data |
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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> |
7c0f6ba6 | 20 | #include <linux/uaccess.h> |
b3b94faa DT |
21 | |
22 | #include "gfs2.h" | |
5c676f6d | 23 | #include "incore.h" |
b3b94faa DT |
24 | #include "acl.h" |
25 | #include "bmap.h" | |
26 | #include "dir.h" | |
307cf6e6 | 27 | #include "xattr.h" |
b3b94faa DT |
28 | #include "glock.h" |
29 | #include "inode.h" | |
30 | #include "meta_io.h" | |
b3b94faa DT |
31 | #include "quota.h" |
32 | #include "rgrp.h" | |
33 | #include "trans.h" | |
5c676f6d | 34 | #include "util.h" |
b2760583 | 35 | #include "super.h" |
194c011f SW |
36 | #include "glops.h" |
37 | ||
cda9dd42 | 38 | static int iget_test(struct inode *inode, void *opaque) |
194c011f | 39 | { |
cda9dd42 AG |
40 | u64 no_addr = *(u64 *)opaque; |
41 | ||
42 | return GFS2_I(inode)->i_no_addr == no_addr; | |
43 | } | |
44 | ||
45 | static int iget_set(struct inode *inode, void *opaque) | |
46 | { | |
47 | u64 no_addr = *(u64 *)opaque; | |
48 | ||
49 | GFS2_I(inode)->i_no_addr = no_addr; | |
50 | inode->i_ino = no_addr; | |
51 | return 0; | |
52 | } | |
53 | ||
3ce37b2c AG |
54 | static struct inode *gfs2_iget(struct super_block *sb, u64 no_addr) |
55 | { | |
56 | struct inode *inode; | |
57 | ||
58 | repeat: | |
cda9dd42 | 59 | inode = iget5_locked(sb, no_addr, iget_test, iget_set, &no_addr); |
3ce37b2c AG |
60 | if (!inode) |
61 | return inode; | |
62 | if (is_bad_inode(inode)) { | |
63 | iput(inode); | |
64 | goto repeat; | |
65 | } | |
3ce37b2c | 66 | return inode; |
194c011f SW |
67 | } |
68 | ||
69 | /** | |
70 | * gfs2_set_iop - Sets inode operations | |
71 | * @inode: The inode with correct i_mode filled in | |
72 | * | |
73 | * GFS2 lookup code fills in vfs inode contents based on info obtained | |
74 | * from directory entry inside gfs2_inode_lookup(). | |
75 | */ | |
76 | ||
77 | static void gfs2_set_iop(struct inode *inode) | |
78 | { | |
79 | struct gfs2_sbd *sdp = GFS2_SB(inode); | |
80 | umode_t mode = inode->i_mode; | |
81 | ||
82 | if (S_ISREG(mode)) { | |
83 | inode->i_op = &gfs2_file_iops; | |
84 | if (gfs2_localflocks(sdp)) | |
85 | inode->i_fop = &gfs2_file_fops_nolock; | |
86 | else | |
87 | inode->i_fop = &gfs2_file_fops; | |
88 | } else if (S_ISDIR(mode)) { | |
89 | inode->i_op = &gfs2_dir_iops; | |
90 | if (gfs2_localflocks(sdp)) | |
91 | inode->i_fop = &gfs2_dir_fops_nolock; | |
92 | else | |
93 | inode->i_fop = &gfs2_dir_fops; | |
94 | } else if (S_ISLNK(mode)) { | |
95 | inode->i_op = &gfs2_symlink_iops; | |
96 | } else { | |
97 | inode->i_op = &gfs2_file_iops; | |
98 | init_special_inode(inode, inode->i_mode, inode->i_rdev); | |
99 | } | |
100 | } | |
101 | ||
102 | /** | |
103 | * gfs2_inode_lookup - Lookup an inode | |
104 | * @sb: The super block | |
194c011f | 105 | * @type: The type of the inode |
3ce37b2c AG |
106 | * @no_addr: The inode number |
107 | * @no_formal_ino: The inode generation number | |
108 | * @blktype: Requested block type (GFS2_BLKST_DINODE or GFS2_BLKST_UNLINKED; | |
61b91cfd | 109 | * GFS2_BLKST_FREE to indicate not to verify) |
3ce37b2c AG |
110 | * |
111 | * If @type is DT_UNKNOWN, the inode type is fetched from disk. | |
112 | * | |
113 | * If @blktype is anything other than GFS2_BLKST_FREE (which is used as a | |
114 | * placeholder because it doesn't otherwise make sense), the on-disk block type | |
115 | * is verified to be @blktype. | |
194c011f SW |
116 | * |
117 | * Returns: A VFS inode, or an error | |
118 | */ | |
119 | ||
120 | struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned int type, | |
3ce37b2c AG |
121 | u64 no_addr, u64 no_formal_ino, |
122 | unsigned int blktype) | |
194c011f SW |
123 | { |
124 | struct inode *inode; | |
125 | struct gfs2_inode *ip; | |
126 | struct gfs2_glock *io_gl = NULL; | |
3ce37b2c | 127 | struct gfs2_holder i_gh; |
194c011f SW |
128 | int error; |
129 | ||
6df9f9a2 | 130 | gfs2_holder_mark_uninitialized(&i_gh); |
3ce37b2c | 131 | inode = gfs2_iget(sb, no_addr); |
194c011f | 132 | if (!inode) |
ac3beb6a | 133 | return ERR_PTR(-ENOMEM); |
194c011f | 134 | |
e97321fa | 135 | ip = GFS2_I(inode); |
e97321fa | 136 | |
194c011f SW |
137 | if (inode->i_state & I_NEW) { |
138 | struct gfs2_sbd *sdp = GFS2_SB(inode); | |
194c011f SW |
139 | |
140 | error = gfs2_glock_get(sdp, no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl); | |
141 | if (unlikely(error)) | |
142 | goto fail; | |
4fd1a579 | 143 | flush_delayed_work(&ip->i_gl->gl_work); |
194c011f SW |
144 | |
145 | error = gfs2_glock_get(sdp, no_addr, &gfs2_iopen_glops, CREATE, &io_gl); | |
146 | if (unlikely(error)) | |
40e7e86e | 147 | goto fail; |
194c011f | 148 | |
3ce37b2c AG |
149 | if (type == DT_UNKNOWN || blktype != GFS2_BLKST_FREE) { |
150 | /* | |
151 | * The GL_SKIP flag indicates to skip reading the inode | |
152 | * block. We read the inode with gfs2_inode_refresh | |
153 | * after possibly checking the block type. | |
154 | */ | |
155 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, | |
156 | GL_SKIP, &i_gh); | |
157 | if (error) | |
40e7e86e | 158 | goto fail; |
3ce37b2c AG |
159 | |
160 | if (blktype != GFS2_BLKST_FREE) { | |
161 | error = gfs2_check_blk_type(sdp, no_addr, | |
162 | blktype); | |
163 | if (error) | |
40e7e86e | 164 | goto fail; |
3ce37b2c AG |
165 | } |
166 | } | |
167 | ||
4d7c18c7 | 168 | glock_set_object(ip->i_gl, ip); |
194c011f SW |
169 | set_bit(GIF_INVALID, &ip->i_flags); |
170 | error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh); | |
171 | if (unlikely(error)) | |
40e7e86e | 172 | goto fail; |
a0e3cc65 | 173 | gfs2_cancel_delete_work(ip->i_iopen_gh.gh_gl); |
4fd1a579 | 174 | glock_set_object(ip->i_iopen_gh.gh_gl, ip); |
194c011f SW |
175 | gfs2_glock_put(io_gl); |
176 | io_gl = NULL; | |
177 | ||
2b0fb353 AG |
178 | /* Lowest possible timestamp; will be overwritten in gfs2_dinode_in. */ |
179 | inode->i_atime.tv_sec = 1LL << (8 * sizeof(inode->i_atime.tv_sec) - 1); | |
180 | inode->i_atime.tv_nsec = 0; | |
181 | ||
194c011f SW |
182 | if (type == DT_UNKNOWN) { |
183 | /* Inode glock must be locked already */ | |
184 | error = gfs2_inode_refresh(GFS2_I(inode)); | |
185 | if (error) | |
40e7e86e | 186 | goto fail; |
194c011f | 187 | } else { |
2b0fb353 | 188 | ip->i_no_formal_ino = no_formal_ino; |
194c011f SW |
189 | inode->i_mode = DT2IF(type); |
190 | } | |
191 | ||
192 | gfs2_set_iop(inode); | |
332f51d7 | 193 | |
194c011f SW |
194 | unlock_new_inode(inode); |
195 | } | |
196 | ||
6df9f9a2 | 197 | if (gfs2_holder_initialized(&i_gh)) |
3ce37b2c | 198 | gfs2_glock_dq_uninit(&i_gh); |
194c011f SW |
199 | return inode; |
200 | ||
40e7e86e | 201 | fail: |
194c011f SW |
202 | if (io_gl) |
203 | gfs2_glock_put(io_gl); | |
6df9f9a2 | 204 | if (gfs2_holder_initialized(&i_gh)) |
3ce37b2c | 205 | gfs2_glock_dq_uninit(&i_gh); |
194c011f SW |
206 | iget_failed(inode); |
207 | return ERR_PTR(error); | |
208 | } | |
209 | ||
210 | struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr, | |
211 | u64 *no_formal_ino, unsigned int blktype) | |
212 | { | |
213 | struct super_block *sb = sdp->sd_vfs; | |
3ce37b2c | 214 | struct inode *inode; |
194c011f SW |
215 | int error; |
216 | ||
3ce37b2c | 217 | inode = gfs2_inode_lookup(sb, DT_UNKNOWN, no_addr, 0, blktype); |
194c011f | 218 | if (IS_ERR(inode)) |
3ce37b2c | 219 | return inode; |
194c011f SW |
220 | |
221 | /* Two extra checks for NFS only */ | |
222 | if (no_formal_ino) { | |
223 | error = -ESTALE; | |
224 | if (GFS2_I(inode)->i_no_formal_ino != *no_formal_ino) | |
225 | goto fail_iput; | |
226 | ||
227 | error = -EIO; | |
228 | if (GFS2_I(inode)->i_diskflags & GFS2_DIF_SYSTEM) | |
229 | goto fail_iput; | |
194c011f | 230 | } |
3ce37b2c | 231 | return inode; |
194c011f | 232 | |
194c011f SW |
233 | fail_iput: |
234 | iput(inode); | |
3ce37b2c | 235 | return ERR_PTR(error); |
194c011f SW |
236 | } |
237 | ||
238 | ||
239 | struct inode *gfs2_lookup_simple(struct inode *dip, const char *name) | |
240 | { | |
241 | struct qstr qstr; | |
242 | struct inode *inode; | |
243 | gfs2_str2qstr(&qstr, name); | |
244 | inode = gfs2_lookupi(dip, &qstr, 1); | |
245 | /* gfs2_lookupi has inconsistent callers: vfs | |
246 | * related routines expect NULL for no entry found, | |
247 | * gfs2_lookup_simple callers expect ENOENT | |
248 | * and do not check for NULL. | |
249 | */ | |
250 | if (inode == NULL) | |
251 | return ERR_PTR(-ENOENT); | |
252 | else | |
253 | return inode; | |
254 | } | |
255 | ||
256 | ||
257 | /** | |
258 | * gfs2_lookupi - Look up a filename in a directory and return its inode | |
259 | * @d_gh: An initialized holder for the directory glock | |
260 | * @name: The name of the inode to look for | |
261 | * @is_root: If 1, ignore the caller's permissions | |
262 | * @i_gh: An uninitialized holder for the new inode glock | |
263 | * | |
264 | * This can be called via the VFS filldir function when NFS is doing | |
265 | * a readdirplus and the inode which its intending to stat isn't | |
266 | * already in cache. In this case we must not take the directory glock | |
267 | * again, since the readdir call will have already taken that lock. | |
268 | * | |
269 | * Returns: errno | |
270 | */ | |
271 | ||
272 | struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name, | |
273 | int is_root) | |
274 | { | |
275 | struct super_block *sb = dir->i_sb; | |
276 | struct gfs2_inode *dip = GFS2_I(dir); | |
277 | struct gfs2_holder d_gh; | |
278 | int error = 0; | |
279 | struct inode *inode = NULL; | |
194c011f | 280 | |
6df9f9a2 | 281 | gfs2_holder_mark_uninitialized(&d_gh); |
194c011f SW |
282 | if (!name->len || name->len > GFS2_FNAMESIZE) |
283 | return ERR_PTR(-ENAMETOOLONG); | |
284 | ||
285 | if ((name->len == 1 && memcmp(name->name, ".", 1) == 0) || | |
286 | (name->len == 2 && memcmp(name->name, "..", 2) == 0 && | |
2b0143b5 | 287 | dir == d_inode(sb->s_root))) { |
194c011f SW |
288 | igrab(dir); |
289 | return dir; | |
290 | } | |
291 | ||
292 | if (gfs2_glock_is_locked_by_me(dip->i_gl) == NULL) { | |
293 | error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh); | |
294 | if (error) | |
295 | return ERR_PTR(error); | |
194c011f SW |
296 | } |
297 | ||
298 | if (!is_root) { | |
10556cb2 | 299 | error = gfs2_permission(dir, MAY_EXEC); |
194c011f SW |
300 | if (error) |
301 | goto out; | |
302 | } | |
303 | ||
5a00f3cc | 304 | inode = gfs2_dir_search(dir, name, false); |
194c011f SW |
305 | if (IS_ERR(inode)) |
306 | error = PTR_ERR(inode); | |
307 | out: | |
6df9f9a2 | 308 | if (gfs2_holder_initialized(&d_gh)) |
194c011f SW |
309 | gfs2_glock_dq_uninit(&d_gh); |
310 | if (error == -ENOENT) | |
311 | return NULL; | |
312 | return inode ? inode : ERR_PTR(error); | |
313 | } | |
314 | ||
315 | /** | |
316 | * create_ok - OK to create a new on-disk inode here? | |
317 | * @dip: Directory in which dinode is to be created | |
318 | * @name: Name of new dinode | |
319 | * @mode: | |
320 | * | |
321 | * Returns: errno | |
322 | */ | |
323 | ||
324 | static int create_ok(struct gfs2_inode *dip, const struct qstr *name, | |
175a4eb7 | 325 | umode_t mode) |
194c011f SW |
326 | { |
327 | int error; | |
328 | ||
10556cb2 | 329 | error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC); |
194c011f SW |
330 | if (error) |
331 | return error; | |
332 | ||
333 | /* Don't create entries in an unlinked directory */ | |
334 | if (!dip->i_inode.i_nlink) | |
335 | return -ENOENT; | |
336 | ||
194c011f SW |
337 | if (dip->i_entries == (u32)-1) |
338 | return -EFBIG; | |
339 | if (S_ISDIR(mode) && dip->i_inode.i_nlink == (u32)-1) | |
340 | return -EMLINK; | |
341 | ||
342 | return 0; | |
343 | } | |
344 | ||
c9aecf73 SW |
345 | static void munge_mode_uid_gid(const struct gfs2_inode *dip, |
346 | struct inode *inode) | |
194c011f SW |
347 | { |
348 | if (GFS2_SB(&dip->i_inode)->sd_args.ar_suiddir && | |
6b24c0d2 EB |
349 | (dip->i_inode.i_mode & S_ISUID) && |
350 | !uid_eq(dip->i_inode.i_uid, GLOBAL_ROOT_UID)) { | |
c9aecf73 SW |
351 | if (S_ISDIR(inode->i_mode)) |
352 | inode->i_mode |= S_ISUID; | |
6b24c0d2 | 353 | else if (!uid_eq(dip->i_inode.i_uid, current_fsuid())) |
c9aecf73 SW |
354 | inode->i_mode &= ~07111; |
355 | inode->i_uid = dip->i_inode.i_uid; | |
194c011f | 356 | } else |
c9aecf73 | 357 | inode->i_uid = current_fsuid(); |
194c011f SW |
358 | |
359 | if (dip->i_inode.i_mode & S_ISGID) { | |
c9aecf73 SW |
360 | if (S_ISDIR(inode->i_mode)) |
361 | inode->i_mode |= S_ISGID; | |
362 | inode->i_gid = dip->i_inode.i_gid; | |
194c011f | 363 | } else |
c9aecf73 | 364 | inode->i_gid = current_fsgid(); |
194c011f SW |
365 | } |
366 | ||
b2c8b3ea | 367 | static int alloc_dinode(struct gfs2_inode *ip, u32 flags, unsigned *dblocks) |
194c011f | 368 | { |
c9aecf73 | 369 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b2c8b3ea | 370 | struct gfs2_alloc_parms ap = { .target = *dblocks, .aflags = flags, }; |
194c011f SW |
371 | int error; |
372 | ||
b8fbf471 | 373 | error = gfs2_quota_lock_check(ip, &ap); |
194c011f SW |
374 | if (error) |
375 | goto out; | |
376 | ||
7b9cff46 | 377 | error = gfs2_inplace_reserve(ip, &ap); |
fd4b4e04 SW |
378 | if (error) |
379 | goto out_quota; | |
380 | ||
b2c8b3ea | 381 | error = gfs2_trans_begin(sdp, (*dblocks * RES_RG_BIT) + RES_STATFS + RES_QUOTA, 0); |
194c011f SW |
382 | if (error) |
383 | goto out_ipreserv; | |
384 | ||
b2c8b3ea | 385 | error = gfs2_alloc_blocks(ip, &ip->i_no_addr, dblocks, 1, &ip->i_generation); |
c9aecf73 SW |
386 | ip->i_no_formal_ino = ip->i_generation; |
387 | ip->i_inode.i_ino = ip->i_no_addr; | |
388 | ip->i_goal = ip->i_no_addr; | |
194c011f SW |
389 | |
390 | gfs2_trans_end(sdp); | |
391 | ||
392 | out_ipreserv: | |
c9aecf73 | 393 | gfs2_inplace_release(ip); |
fd4b4e04 SW |
394 | out_quota: |
395 | gfs2_quota_unlock(ip); | |
194c011f | 396 | out: |
194c011f SW |
397 | return error; |
398 | } | |
399 | ||
f2741d98 SW |
400 | static void gfs2_init_dir(struct buffer_head *dibh, |
401 | const struct gfs2_inode *parent) | |
e2d0a13b SW |
402 | { |
403 | struct gfs2_dinode *di = (struct gfs2_dinode *)dibh->b_data; | |
404 | struct gfs2_dirent *dent = (struct gfs2_dirent *)(di+1); | |
405 | ||
406 | gfs2_qstr2dirent(&gfs2_qdot, GFS2_DIRENT_SIZE(gfs2_qdot.len), dent); | |
407 | dent->de_inum = di->di_num; /* already GFS2 endian */ | |
408 | dent->de_type = cpu_to_be16(DT_DIR); | |
409 | ||
410 | dent = (struct gfs2_dirent *)((char*)dent + GFS2_DIRENT_SIZE(1)); | |
411 | gfs2_qstr2dirent(&gfs2_qdotdot, dibh->b_size - GFS2_DIRENT_SIZE(1) - sizeof(struct gfs2_dinode), dent); | |
412 | gfs2_inum_out(parent, dent); | |
413 | dent->de_type = cpu_to_be16(DT_DIR); | |
414 | ||
415 | } | |
416 | ||
b2c8b3ea SW |
417 | /** |
418 | * gfs2_init_xattr - Initialise an xattr block for a new inode | |
419 | * @ip: The inode in question | |
420 | * | |
421 | * This sets up an empty xattr block for a new inode, ready to | |
422 | * take any ACLs, LSM xattrs, etc. | |
423 | */ | |
424 | ||
425 | static void gfs2_init_xattr(struct gfs2_inode *ip) | |
426 | { | |
427 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); | |
428 | struct buffer_head *bh; | |
429 | struct gfs2_ea_header *ea; | |
430 | ||
431 | bh = gfs2_meta_new(ip->i_gl, ip->i_eattr); | |
432 | gfs2_trans_add_meta(ip->i_gl, bh); | |
433 | gfs2_metatype_set(bh, GFS2_METATYPE_EA, GFS2_FORMAT_EA); | |
434 | gfs2_buffer_clear_tail(bh, sizeof(struct gfs2_meta_header)); | |
435 | ||
436 | ea = GFS2_EA_BH2FIRST(bh); | |
437 | ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize); | |
438 | ea->ea_type = GFS2_EATYPE_UNUSED; | |
439 | ea->ea_flags = GFS2_EAFLAG_LAST; | |
440 | ||
441 | brelse(bh); | |
442 | } | |
443 | ||
194c011f SW |
444 | /** |
445 | * init_dinode - Fill in a new dinode structure | |
f2741d98 | 446 | * @dip: The directory this inode is being created in |
c9aecf73 | 447 | * @ip: The inode |
f2741d98 | 448 | * @symname: The symlink destination (if a symlink) |
f2741d98 | 449 | * @bhp: The buffer head (returned to caller) |
194c011f SW |
450 | * |
451 | */ | |
452 | ||
c9aecf73 | 453 | static void init_dinode(struct gfs2_inode *dip, struct gfs2_inode *ip, |
79ba7480 | 454 | const char *symname) |
194c011f | 455 | { |
194c011f SW |
456 | struct gfs2_dinode *di; |
457 | struct buffer_head *dibh; | |
194c011f | 458 | |
c9aecf73 | 459 | dibh = gfs2_meta_new(ip->i_gl, ip->i_no_addr); |
350a9b0a | 460 | gfs2_trans_add_meta(ip->i_gl, dibh); |
194c011f | 461 | di = (struct gfs2_dinode *)dibh->b_data; |
79ba7480 | 462 | gfs2_dinode_out(ip, di); |
194c011f | 463 | |
c9aecf73 SW |
464 | di->di_major = cpu_to_be32(MAJOR(ip->i_inode.i_rdev)); |
465 | di->di_minor = cpu_to_be32(MINOR(ip->i_inode.i_rdev)); | |
194c011f | 466 | di->__pad1 = 0; |
194c011f SW |
467 | di->__pad2 = 0; |
468 | di->__pad3 = 0; | |
194c011f | 469 | memset(&di->__pad4, 0, sizeof(di->__pad4)); |
194c011f | 470 | memset(&di->di_reserved, 0, sizeof(di->di_reserved)); |
79ba7480 | 471 | gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode)); |
160b4026 | 472 | |
c9aecf73 | 473 | switch(ip->i_inode.i_mode & S_IFMT) { |
160b4026 | 474 | case S_IFDIR: |
e2d0a13b | 475 | gfs2_init_dir(dibh, dip); |
160b4026 SW |
476 | break; |
477 | case S_IFLNK: | |
c9aecf73 | 478 | memcpy(dibh->b_data + sizeof(struct gfs2_dinode), symname, ip->i_inode.i_size); |
160b4026 | 479 | break; |
e2d0a13b SW |
480 | } |
481 | ||
194c011f | 482 | set_buffer_uptodate(dibh); |
79ba7480 | 483 | brelse(dibh); |
194c011f SW |
484 | } |
485 | ||
534cf9ca SW |
486 | /** |
487 | * gfs2_trans_da_blocks - Calculate number of blocks to link inode | |
488 | * @dip: The directory we are linking into | |
489 | * @da: The dir add information | |
490 | * @nr_inodes: The number of inodes involved | |
491 | * | |
492 | * This calculate the number of blocks we need to reserve in a | |
493 | * transaction to link @nr_inodes into a directory. In most cases | |
494 | * @nr_inodes will be 2 (the directory plus the inode being linked in) | |
495 | * but in case of rename, 4 may be required. | |
496 | * | |
497 | * Returns: Number of blocks | |
498 | */ | |
499 | ||
500 | static unsigned gfs2_trans_da_blks(const struct gfs2_inode *dip, | |
501 | const struct gfs2_diradd *da, | |
502 | unsigned nr_inodes) | |
503 | { | |
504 | return da->nr_blocks + gfs2_rg_blocks(dip, da->nr_blocks) + | |
505 | (nr_inodes * RES_DINODE) + RES_QUOTA + RES_STATFS; | |
506 | } | |
507 | ||
194c011f | 508 | static int link_dinode(struct gfs2_inode *dip, const struct qstr *name, |
3c1c0ae1 | 509 | struct gfs2_inode *ip, struct gfs2_diradd *da) |
194c011f SW |
510 | { |
511 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); | |
3c1c0ae1 | 512 | struct gfs2_alloc_parms ap = { .target = da->nr_blocks, }; |
194c011f SW |
513 | int error; |
514 | ||
3c1c0ae1 | 515 | if (da->nr_blocks) { |
b8fbf471 | 516 | error = gfs2_quota_lock_check(dip, &ap); |
194c011f SW |
517 | if (error) |
518 | goto fail_quota_locks; | |
519 | ||
7b9cff46 | 520 | error = gfs2_inplace_reserve(dip, &ap); |
194c011f SW |
521 | if (error) |
522 | goto fail_quota_locks; | |
523 | ||
534cf9ca | 524 | error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, da, 2), 0); |
194c011f SW |
525 | if (error) |
526 | goto fail_ipreserv; | |
527 | } else { | |
528 | error = gfs2_trans_begin(sdp, RES_LEAF + 2 * RES_DINODE, 0); | |
529 | if (error) | |
530 | goto fail_quota_locks; | |
531 | } | |
532 | ||
2b47dad8 | 533 | error = gfs2_dir_add(&dip->i_inode, name, ip, da); |
194c011f | 534 | |
194c011f | 535 | gfs2_trans_end(sdp); |
194c011f | 536 | fail_ipreserv: |
fd4b4e04 | 537 | gfs2_inplace_release(dip); |
194c011f SW |
538 | fail_quota_locks: |
539 | gfs2_quota_unlock(dip); | |
194c011f SW |
540 | return error; |
541 | } | |
542 | ||
46cc1e5f | 543 | static int gfs2_initxattrs(struct inode *inode, const struct xattr *xattr_array, |
9d8f13ba | 544 | void *fs_info) |
194c011f | 545 | { |
9d8f13ba MZ |
546 | const struct xattr *xattr; |
547 | int err = 0; | |
548 | ||
549 | for (xattr = xattr_array; xattr->name != NULL; xattr++) { | |
550 | err = __gfs2_xattr_set(inode, xattr->name, xattr->value, | |
551 | xattr->value_len, 0, | |
552 | GFS2_EATYPE_SECURITY); | |
553 | if (err < 0) | |
554 | break; | |
194c011f | 555 | } |
194c011f SW |
556 | return err; |
557 | } | |
b3b94faa | 558 | |
194c011f | 559 | /** |
f2741d98 SW |
560 | * gfs2_create_inode - Create a new inode |
561 | * @dir: The parent directory | |
562 | * @dentry: The new dentry | |
6d4ade98 | 563 | * @file: If non-NULL, the file which is being opened |
f2741d98 SW |
564 | * @mode: The permissions on the new inode |
565 | * @dev: For device nodes, this is the device number | |
566 | * @symname: For symlinks, this is the link destination | |
567 | * @size: The initial size of the inode (ignored for directories) | |
194c011f | 568 | * |
f2741d98 | 569 | * Returns: 0 on success, or error code |
194c011f SW |
570 | */ |
571 | ||
f2741d98 | 572 | static int gfs2_create_inode(struct inode *dir, struct dentry *dentry, |
6d4ade98 | 573 | struct file *file, |
175a4eb7 | 574 | umode_t mode, dev_t dev, const char *symname, |
b452a458 | 575 | unsigned int size, int excl) |
194c011f | 576 | { |
f2741d98 | 577 | const struct qstr *name = &dentry->d_name; |
e01580bf | 578 | struct posix_acl *default_acl, *acl; |
f2741d98 | 579 | struct gfs2_holder ghs[2]; |
194c011f | 580 | struct inode *inode = NULL; |
8e2e0047 | 581 | struct gfs2_inode *dip = GFS2_I(dir), *ip; |
194c011f | 582 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); |
a4923865 | 583 | struct gfs2_glock *io_gl = NULL; |
783013c0 | 584 | int error, free_vfs_inode = 1; |
9dbe9610 | 585 | u32 aflags = 0; |
b2c8b3ea | 586 | unsigned blocks = 1; |
19aeb5a6 | 587 | struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, }; |
194c011f SW |
588 | |
589 | if (!name->len || name->len > GFS2_FNAMESIZE) | |
f2741d98 | 590 | return -ENAMETOOLONG; |
194c011f | 591 | |
2fba46a0 | 592 | error = gfs2_qa_get(dip); |
0a305e49 BP |
593 | if (error) |
594 | return error; | |
595 | ||
fd4b4e04 SW |
596 | error = gfs2_rindex_update(sdp); |
597 | if (error) | |
2fba46a0 | 598 | goto fail; |
fd4b4e04 | 599 | |
f2741d98 | 600 | error = gfs2_glock_nq_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); |
194c011f SW |
601 | if (error) |
602 | goto fail; | |
e0b62e21 | 603 | gfs2_holder_mark_uninitialized(ghs + 1); |
194c011f SW |
604 | |
605 | error = create_ok(dip, name, mode); | |
5a00f3cc SW |
606 | if (error) |
607 | goto fail_gunlock; | |
608 | ||
609 | inode = gfs2_dir_search(dir, &dentry->d_name, !S_ISREG(mode) || excl); | |
610 | error = PTR_ERR(inode); | |
611 | if (!IS_ERR(inode)) { | |
571a4b57 AV |
612 | if (S_ISDIR(inode->i_mode)) { |
613 | iput(inode); | |
614 | inode = ERR_PTR(-EISDIR); | |
615 | goto fail_gunlock; | |
616 | } | |
44bb31ba | 617 | d_instantiate(dentry, inode); |
6d4ade98 | 618 | error = 0; |
0d0d1107 | 619 | if (file) { |
44bb31ba | 620 | if (S_ISREG(inode->i_mode)) |
be12af3e | 621 | error = finish_open(file, dentry, gfs2_open_common); |
44bb31ba AV |
622 | else |
623 | error = finish_no_open(file, NULL); | |
6d4ade98 | 624 | } |
9a63edd1 | 625 | gfs2_glock_dq_uninit(ghs); |
2297ab61 | 626 | goto fail; |
5a00f3cc | 627 | } else if (error != -ENOENT) { |
194c011f | 628 | goto fail_gunlock; |
5a00f3cc | 629 | } |
194c011f | 630 | |
3c1c0ae1 | 631 | error = gfs2_diradd_alloc_required(dir, name, &da); |
fd4b4e04 SW |
632 | if (error < 0) |
633 | goto fail_gunlock; | |
634 | ||
c9aecf73 | 635 | inode = new_inode(sdp->sd_vfs); |
fd4b4e04 SW |
636 | error = -ENOMEM; |
637 | if (!inode) | |
638 | goto fail_gunlock; | |
639 | ||
e01580bf CH |
640 | error = posix_acl_create(dir, &mode, &default_acl, &acl); |
641 | if (error) | |
783013c0 | 642 | goto fail_gunlock; |
e01580bf | 643 | |
c9aecf73 | 644 | ip = GFS2_I(inode); |
2fba46a0 | 645 | error = gfs2_qa_get(ip); |
194c011f | 646 | if (error) |
e01580bf | 647 | goto fail_free_acls; |
c9aecf73 | 648 | |
c9aecf73 | 649 | inode->i_mode = mode; |
79ba7480 | 650 | set_nlink(inode, S_ISDIR(mode) ? 2 : 1); |
c9aecf73 SW |
651 | inode->i_rdev = dev; |
652 | inode->i_size = size; | |
078cd827 | 653 | inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode); |
c9aecf73 | 654 | munge_mode_uid_gid(dip, inode); |
00a158be | 655 | check_and_update_goal(dip); |
c9aecf73 | 656 | ip->i_goal = dip->i_goal; |
28fb3027 SW |
657 | ip->i_diskflags = 0; |
658 | ip->i_eattr = 0; | |
659 | ip->i_height = 0; | |
660 | ip->i_depth = 0; | |
661 | ip->i_entries = 0; | |
cc963a11 | 662 | ip->i_no_addr = 0; /* Temporarily zero until real addr is assigned */ |
28fb3027 SW |
663 | |
664 | switch(mode & S_IFMT) { | |
665 | case S_IFREG: | |
666 | if ((dip->i_diskflags & GFS2_DIF_INHERIT_JDATA) || | |
667 | gfs2_tune_get(sdp, gt_new_files_jdata)) | |
668 | ip->i_diskflags |= GFS2_DIF_JDATA; | |
669 | gfs2_set_aops(inode); | |
670 | break; | |
671 | case S_IFDIR: | |
672 | ip->i_diskflags |= (dip->i_diskflags & GFS2_DIF_INHERIT_JDATA); | |
673 | ip->i_diskflags |= GFS2_DIF_JDATA; | |
674 | ip->i_entries = 2; | |
675 | break; | |
676 | } | |
acc546fd AD |
677 | |
678 | /* Force SYSTEM flag on all files and subdirs of a SYSTEM directory */ | |
679 | if (dip->i_diskflags & GFS2_DIF_SYSTEM) | |
680 | ip->i_diskflags |= GFS2_DIF_SYSTEM; | |
681 | ||
28fb3027 | 682 | gfs2_set_inode_flags(inode); |
194c011f | 683 | |
2b0143b5 | 684 | if ((GFS2_I(d_inode(sdp->sd_root_dir)) == dip) || |
9dbe9610 SW |
685 | (dip->i_diskflags & GFS2_DIF_TOPDIR)) |
686 | aflags |= GFS2_AF_ORLOV; | |
687 | ||
b2c8b3ea SW |
688 | if (default_acl || acl) |
689 | blocks++; | |
690 | ||
691 | error = alloc_dinode(ip, aflags, &blocks); | |
194c011f | 692 | if (error) |
c9aecf73 | 693 | goto fail_free_inode; |
194c011f | 694 | |
b2c8b3ea SW |
695 | gfs2_set_inode_blocks(inode, blocks); |
696 | ||
c9aecf73 | 697 | error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl); |
194c011f | 698 | if (error) |
c9aecf73 | 699 | goto fail_free_inode; |
98e5a91a | 700 | flush_delayed_work(&ip->i_gl->gl_work); |
6f6597ba | 701 | glock_set_object(ip->i_gl, ip); |
98e5a91a | 702 | |
c9aecf73 SW |
703 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1); |
704 | if (error) | |
705 | goto fail_free_inode; | |
706 | ||
b2c8b3ea | 707 | error = gfs2_trans_begin(sdp, blocks, 0); |
c9aecf73 | 708 | if (error) |
2c47c1be | 709 | goto fail_free_inode; |
194c011f | 710 | |
b2c8b3ea SW |
711 | if (blocks > 1) { |
712 | ip->i_eattr = ip->i_no_addr + 1; | |
713 | gfs2_init_xattr(ip); | |
714 | } | |
79ba7480 | 715 | init_dinode(dip, ip, symname); |
fd4b4e04 SW |
716 | gfs2_trans_end(sdp); |
717 | ||
c9aecf73 | 718 | error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_iopen_glops, CREATE, &io_gl); |
194c011f | 719 | if (error) |
2c47c1be | 720 | goto fail_free_inode; |
194c011f | 721 | |
a4923865 BP |
722 | BUG_ON(test_and_set_bit(GLF_INODE_CREATING, &io_gl->gl_flags)); |
723 | ||
c9aecf73 | 724 | error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh); |
ff7f4cb4 SW |
725 | if (error) |
726 | goto fail_gunlock2; | |
0a305e49 | 727 | |
a0e3cc65 | 728 | gfs2_cancel_delete_work(ip->i_iopen_gh.gh_gl); |
6f6597ba | 729 | glock_set_object(ip->i_iopen_gh.gh_gl, ip); |
c9aecf73 SW |
730 | gfs2_set_iop(inode); |
731 | insert_inode_hash(inode); | |
732 | ||
783013c0 BP |
733 | free_vfs_inode = 0; /* After this point, the inode is no longer |
734 | considered free. Any failures need to undo | |
735 | the gfs2 structures. */ | |
e01580bf | 736 | if (default_acl) { |
1a39ba99 | 737 | error = __gfs2_set_acl(inode, default_acl, ACL_TYPE_DEFAULT); |
6ff9b09e AG |
738 | if (error) |
739 | goto fail_gunlock3; | |
e01580bf | 740 | posix_acl_release(default_acl); |
6ff9b09e | 741 | default_acl = NULL; |
e01580bf CH |
742 | } |
743 | if (acl) { | |
6ff9b09e AG |
744 | error = __gfs2_set_acl(inode, acl, ACL_TYPE_ACCESS); |
745 | if (error) | |
746 | goto fail_gunlock3; | |
e01580bf | 747 | posix_acl_release(acl); |
6ff9b09e | 748 | acl = NULL; |
e01580bf CH |
749 | } |
750 | ||
f45dc26d BP |
751 | error = security_inode_init_security(&ip->i_inode, &dip->i_inode, name, |
752 | &gfs2_initxattrs, NULL); | |
194c011f | 753 | if (error) |
c9aecf73 | 754 | goto fail_gunlock3; |
194c011f | 755 | |
3c1c0ae1 | 756 | error = link_dinode(dip, name, ip, &da); |
194c011f | 757 | if (error) |
c9aecf73 | 758 | goto fail_gunlock3; |
194c011f | 759 | |
79ba7480 | 760 | mark_inode_dirty(inode); |
6d4ade98 | 761 | d_instantiate(dentry, inode); |
2c47c1be BP |
762 | /* After instantiate, errors should result in evict which will destroy |
763 | * both inode and iopen glocks properly. */ | |
c5bf8fef | 764 | if (file) { |
73a09dd9 | 765 | file->f_mode |= FMODE_CREATED; |
be12af3e | 766 | error = finish_open(file, dentry, gfs2_open_common); |
c5bf8fef | 767 | } |
28fb3027 | 768 | gfs2_glock_dq_uninit(ghs); |
2297ab61 | 769 | gfs2_qa_put(ip); |
28fb3027 | 770 | gfs2_glock_dq_uninit(ghs + 1); |
a4923865 | 771 | clear_bit(GLF_INODE_CREATING, &io_gl->gl_flags); |
2c47c1be | 772 | gfs2_glock_put(io_gl); |
2297ab61 | 773 | gfs2_qa_put(dip); |
6d4ade98 | 774 | return error; |
194c011f | 775 | |
c9aecf73 | 776 | fail_gunlock3: |
9c1b2808 | 777 | glock_clear_object(io_gl, ip); |
783013c0 | 778 | gfs2_glock_dq_uninit(&ip->i_iopen_gh); |
194c011f | 779 | fail_gunlock2: |
2c47c1be BP |
780 | clear_bit(GLF_INODE_CREATING, &io_gl->gl_flags); |
781 | gfs2_glock_put(io_gl); | |
c9aecf73 | 782 | fail_free_inode: |
9c1b2808 BP |
783 | if (ip->i_gl) { |
784 | glock_clear_object(ip->i_gl, ip); | |
c9aecf73 | 785 | gfs2_glock_put(ip->i_gl); |
9c1b2808 | 786 | } |
1595548f AG |
787 | gfs2_rs_delete(ip, NULL); |
788 | gfs2_qa_put(ip); | |
e01580bf | 789 | fail_free_acls: |
6ff9b09e AG |
790 | posix_acl_release(default_acl); |
791 | posix_acl_release(acl); | |
194c011f | 792 | fail_gunlock: |
2b47dad8 | 793 | gfs2_dir_no_add(&da); |
f2741d98 | 794 | gfs2_glock_dq_uninit(ghs); |
15a798f7 | 795 | if (!IS_ERR_OR_NULL(inode)) { |
79ba7480 | 796 | clear_nlink(inode); |
05978803 AD |
797 | if (!free_vfs_inode) |
798 | mark_inode_dirty(inode); | |
799 | set_bit(free_vfs_inode ? GIF_FREE_VFS_INODE : GIF_ALLOC_FAILED, | |
800 | &GFS2_I(inode)->i_flags); | |
40ac218f SW |
801 | iput(inode); |
802 | } | |
e0b62e21 AG |
803 | if (gfs2_holder_initialized(ghs + 1)) |
804 | gfs2_glock_dq_uninit(ghs + 1); | |
194c011f | 805 | fail: |
2fba46a0 | 806 | gfs2_qa_put(dip); |
f2741d98 | 807 | return error; |
194c011f | 808 | } |
f2741d98 | 809 | |
b3b94faa DT |
810 | /** |
811 | * gfs2_create - Create a file | |
812 | * @dir: The directory in which to create the file | |
813 | * @dentry: The dentry of the new file | |
814 | * @mode: The mode of the new file | |
815 | * | |
816 | * Returns: errno | |
817 | */ | |
818 | ||
819 | static int gfs2_create(struct inode *dir, struct dentry *dentry, | |
ebfc3b49 | 820 | umode_t mode, bool excl) |
b3b94faa | 821 | { |
b452a458 | 822 | return gfs2_create_inode(dir, dentry, NULL, S_IFREG | mode, 0, NULL, 0, excl); |
b3b94faa DT |
823 | } |
824 | ||
825 | /** | |
6d4ade98 | 826 | * __gfs2_lookup - Look up a filename in a directory and return its inode |
b3b94faa DT |
827 | * @dir: The directory inode |
828 | * @dentry: The dentry of the new inode | |
6d4ade98 | 829 | * @file: File to be opened |
b3b94faa | 830 | * |
b3b94faa DT |
831 | * |
832 | * Returns: errno | |
833 | */ | |
834 | ||
6d4ade98 | 835 | static struct dentry *__gfs2_lookup(struct inode *dir, struct dentry *dentry, |
b452a458 | 836 | struct file *file) |
b3b94faa | 837 | { |
6d4ade98 SW |
838 | struct inode *inode; |
839 | struct dentry *d; | |
840 | struct gfs2_holder gh; | |
841 | struct gfs2_glock *gl; | |
842 | int error; | |
843 | ||
844 | inode = gfs2_lookupi(dir, &dentry->d_name, 0); | |
7b7a9115 BC |
845 | if (inode == NULL) { |
846 | d_add(dentry, NULL); | |
6d4ade98 | 847 | return NULL; |
7b7a9115 | 848 | } |
6d4ade98 SW |
849 | if (IS_ERR(inode)) |
850 | return ERR_CAST(inode); | |
851 | ||
852 | gl = GFS2_I(inode)->i_gl; | |
853 | error = gfs2_glock_nq_init(gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); | |
854 | if (error) { | |
855 | iput(inode); | |
856 | return ERR_PTR(error); | |
9656b2c1 | 857 | } |
6d4ade98 SW |
858 | |
859 | d = d_splice_alias(inode, dentry); | |
d57b9c9a | 860 | if (IS_ERR(d)) { |
d57b9c9a BF |
861 | gfs2_glock_dq_uninit(&gh); |
862 | return d; | |
863 | } | |
6d4ade98 | 864 | if (file && S_ISREG(inode->i_mode)) |
be12af3e | 865 | error = finish_open(file, dentry, gfs2_open_common); |
6d4ade98 SW |
866 | |
867 | gfs2_glock_dq_uninit(&gh); | |
5ca1db41 MS |
868 | if (error) { |
869 | dput(d); | |
6d4ade98 | 870 | return ERR_PTR(error); |
5ca1db41 | 871 | } |
6d4ade98 SW |
872 | return d; |
873 | } | |
874 | ||
875 | static struct dentry *gfs2_lookup(struct inode *dir, struct dentry *dentry, | |
876 | unsigned flags) | |
877 | { | |
b452a458 | 878 | return __gfs2_lookup(dir, dentry, NULL); |
b3b94faa DT |
879 | } |
880 | ||
881 | /** | |
882 | * gfs2_link - Link to a file | |
883 | * @old_dentry: The inode to link | |
884 | * @dir: Add link to this directory | |
885 | * @dentry: The name of the link | |
886 | * | |
887 | * Link the inode in "old_dentry" into the directory "dir" with the | |
888 | * name in "dentry". | |
889 | * | |
890 | * Returns: errno | |
891 | */ | |
892 | ||
893 | static int gfs2_link(struct dentry *old_dentry, struct inode *dir, | |
894 | struct dentry *dentry) | |
895 | { | |
feaa7bba SW |
896 | struct gfs2_inode *dip = GFS2_I(dir); |
897 | struct gfs2_sbd *sdp = GFS2_SB(dir); | |
2b0143b5 | 898 | struct inode *inode = d_inode(old_dentry); |
feaa7bba | 899 | struct gfs2_inode *ip = GFS2_I(inode); |
b3b94faa | 900 | struct gfs2_holder ghs[2]; |
2baee03f | 901 | struct buffer_head *dibh; |
19aeb5a6 | 902 | struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, }; |
b3b94faa DT |
903 | int error; |
904 | ||
b60623c2 | 905 | if (S_ISDIR(inode->i_mode)) |
b3b94faa DT |
906 | return -EPERM; |
907 | ||
2fba46a0 | 908 | error = gfs2_qa_get(dip); |
0a305e49 BP |
909 | if (error) |
910 | return error; | |
911 | ||
b3b94faa DT |
912 | gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); |
913 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); | |
914 | ||
72dbf479 BP |
915 | error = gfs2_glock_nq(ghs); /* parent */ |
916 | if (error) | |
917 | goto out_parent; | |
918 | ||
919 | error = gfs2_glock_nq(ghs + 1); /* child */ | |
b3b94faa | 920 | if (error) |
72dbf479 | 921 | goto out_child; |
b3b94faa | 922 | |
d192a8e5 SW |
923 | error = -ENOENT; |
924 | if (inode->i_nlink == 0) | |
925 | goto out_gunlock; | |
926 | ||
10556cb2 | 927 | error = gfs2_permission(dir, MAY_WRITE | MAY_EXEC); |
b3b94faa DT |
928 | if (error) |
929 | goto out_gunlock; | |
930 | ||
dbb7cae2 | 931 | error = gfs2_dir_check(dir, &dentry->d_name, NULL); |
b3b94faa DT |
932 | switch (error) { |
933 | case -ENOENT: | |
934 | break; | |
935 | case 0: | |
936 | error = -EEXIST; | |
937 | default: | |
938 | goto out_gunlock; | |
939 | } | |
940 | ||
941 | error = -EINVAL; | |
4f56110a | 942 | if (!dip->i_inode.i_nlink) |
b3b94faa DT |
943 | goto out_gunlock; |
944 | error = -EFBIG; | |
ad6203f2 | 945 | if (dip->i_entries == (u32)-1) |
b3b94faa DT |
946 | goto out_gunlock; |
947 | error = -EPERM; | |
948 | if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) | |
949 | goto out_gunlock; | |
950 | error = -EINVAL; | |
4f56110a | 951 | if (!ip->i_inode.i_nlink) |
b3b94faa DT |
952 | goto out_gunlock; |
953 | error = -EMLINK; | |
4f56110a | 954 | if (ip->i_inode.i_nlink == (u32)-1) |
b3b94faa DT |
955 | goto out_gunlock; |
956 | ||
3c1c0ae1 | 957 | error = gfs2_diradd_alloc_required(dir, &dentry->d_name, &da); |
c752666c | 958 | if (error < 0) |
b3b94faa DT |
959 | goto out_gunlock; |
960 | ||
3c1c0ae1 SW |
961 | if (da.nr_blocks) { |
962 | struct gfs2_alloc_parms ap = { .target = da.nr_blocks, }; | |
b8fbf471 | 963 | error = gfs2_quota_lock_check(dip, &ap); |
b3b94faa | 964 | if (error) |
5407e242 | 965 | goto out_gunlock; |
b3b94faa | 966 | |
7b9cff46 | 967 | error = gfs2_inplace_reserve(dip, &ap); |
b3b94faa DT |
968 | if (error) |
969 | goto out_gunlock_q; | |
970 | ||
534cf9ca | 971 | error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, &da, 2), 0); |
b3b94faa DT |
972 | if (error) |
973 | goto out_ipres; | |
974 | } else { | |
975 | error = gfs2_trans_begin(sdp, 2 * RES_DINODE + RES_LEAF, 0); | |
976 | if (error) | |
977 | goto out_ipres; | |
978 | } | |
979 | ||
2baee03f | 980 | error = gfs2_meta_inode_buffer(ip, &dibh); |
b3b94faa DT |
981 | if (error) |
982 | goto out_end_trans; | |
983 | ||
2b47dad8 | 984 | error = gfs2_dir_add(dir, &dentry->d_name, ip, &da); |
2baee03f SW |
985 | if (error) |
986 | goto out_brelse; | |
987 | ||
350a9b0a | 988 | gfs2_trans_add_meta(ip->i_gl, dibh); |
2baee03f | 989 | inc_nlink(&ip->i_inode); |
078cd827 | 990 | ip->i_inode.i_ctime = current_time(&ip->i_inode); |
ab9bbda0 SW |
991 | ihold(inode); |
992 | d_instantiate(dentry, inode); | |
993 | mark_inode_dirty(inode); | |
b3b94faa | 994 | |
2baee03f SW |
995 | out_brelse: |
996 | brelse(dibh); | |
feaa7bba | 997 | out_end_trans: |
b3b94faa | 998 | gfs2_trans_end(sdp); |
feaa7bba | 999 | out_ipres: |
3c1c0ae1 | 1000 | if (da.nr_blocks) |
b3b94faa | 1001 | gfs2_inplace_release(dip); |
feaa7bba | 1002 | out_gunlock_q: |
3c1c0ae1 | 1003 | if (da.nr_blocks) |
b3b94faa | 1004 | gfs2_quota_unlock(dip); |
feaa7bba | 1005 | out_gunlock: |
2b47dad8 | 1006 | gfs2_dir_no_add(&da); |
72dbf479 BP |
1007 | gfs2_glock_dq(ghs + 1); |
1008 | out_child: | |
1009 | gfs2_glock_dq(ghs); | |
1010 | out_parent: | |
2297ab61 | 1011 | gfs2_qa_put(dip); |
b3b94faa DT |
1012 | gfs2_holder_uninit(ghs); |
1013 | gfs2_holder_uninit(ghs + 1); | |
b3b94faa DT |
1014 | return error; |
1015 | } | |
1016 | ||
87ec2174 SW |
1017 | /* |
1018 | * gfs2_unlink_ok - check to see that a inode is still in a directory | |
1019 | * @dip: the directory | |
1020 | * @name: the name of the file | |
1021 | * @ip: the inode | |
1022 | * | |
1023 | * Assumes that the lock on (at least) @dip is held. | |
1024 | * | |
1025 | * Returns: 0 if the parent/child relationship is correct, errno if it isn't | |
1026 | */ | |
1027 | ||
1028 | static int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name, | |
1029 | const struct gfs2_inode *ip) | |
1030 | { | |
1031 | int error; | |
1032 | ||
1033 | if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode)) | |
1034 | return -EPERM; | |
1035 | ||
1036 | if ((dip->i_inode.i_mode & S_ISVTX) && | |
6b24c0d2 EB |
1037 | !uid_eq(dip->i_inode.i_uid, current_fsuid()) && |
1038 | !uid_eq(ip->i_inode.i_uid, current_fsuid()) && !capable(CAP_FOWNER)) | |
87ec2174 SW |
1039 | return -EPERM; |
1040 | ||
1041 | if (IS_APPEND(&dip->i_inode)) | |
1042 | return -EPERM; | |
1043 | ||
10556cb2 | 1044 | error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC); |
87ec2174 SW |
1045 | if (error) |
1046 | return error; | |
1047 | ||
37975f15 | 1048 | return gfs2_dir_check(&dip->i_inode, name, ip); |
87ec2174 SW |
1049 | } |
1050 | ||
b3b94faa | 1051 | /** |
855d23ce SW |
1052 | * gfs2_unlink_inode - Removes an inode from its parent dir and unlinks it |
1053 | * @dip: The parent directory | |
1054 | * @name: The name of the entry in the parent directory | |
855d23ce SW |
1055 | * @inode: The inode to be removed |
1056 | * | |
1057 | * Called with all the locks and in a transaction. This will only be | |
1058 | * called for a directory after it has been checked to ensure it is empty. | |
1059 | * | |
1060 | * Returns: 0 on success, or an error | |
1061 | */ | |
1062 | ||
1063 | static int gfs2_unlink_inode(struct gfs2_inode *dip, | |
4327a9bf | 1064 | const struct dentry *dentry) |
855d23ce | 1065 | { |
2b0143b5 | 1066 | struct inode *inode = d_inode(dentry); |
855d23ce SW |
1067 | struct gfs2_inode *ip = GFS2_I(inode); |
1068 | int error; | |
1069 | ||
1070 | error = gfs2_dir_del(dip, dentry); | |
1071 | if (error) | |
1072 | return error; | |
1073 | ||
1074 | ip->i_entries = 0; | |
078cd827 | 1075 | inode->i_ctime = current_time(inode); |
855d23ce SW |
1076 | if (S_ISDIR(inode->i_mode)) |
1077 | clear_nlink(inode); | |
1078 | else | |
1079 | drop_nlink(inode); | |
855d23ce SW |
1080 | mark_inode_dirty(inode); |
1081 | if (inode->i_nlink == 0) | |
1082 | gfs2_unlink_di(inode); | |
1083 | return 0; | |
1084 | } | |
1085 | ||
1086 | ||
1087 | /** | |
1088 | * gfs2_unlink - Unlink an inode (this does rmdir as well) | |
1089 | * @dir: The inode of the directory containing the inode to unlink | |
b3b94faa DT |
1090 | * @dentry: The file itself |
1091 | * | |
855d23ce SW |
1092 | * This routine uses the type of the inode as a flag to figure out |
1093 | * whether this is an unlink or an rmdir. | |
b3b94faa DT |
1094 | * |
1095 | * Returns: errno | |
1096 | */ | |
1097 | ||
1098 | static int gfs2_unlink(struct inode *dir, struct dentry *dentry) | |
1099 | { | |
feaa7bba SW |
1100 | struct gfs2_inode *dip = GFS2_I(dir); |
1101 | struct gfs2_sbd *sdp = GFS2_SB(dir); | |
2b0143b5 | 1102 | struct inode *inode = d_inode(dentry); |
855d23ce | 1103 | struct gfs2_inode *ip = GFS2_I(inode); |
ddee7608 RC |
1104 | struct gfs2_holder ghs[3]; |
1105 | struct gfs2_rgrpd *rgd; | |
5e2f7d61 BP |
1106 | int error; |
1107 | ||
1108 | error = gfs2_rindex_update(sdp); | |
1109 | if (error) | |
1110 | return error; | |
1111 | ||
1112 | error = -EROFS; | |
b3b94faa | 1113 | |
b3b94faa | 1114 | gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); |
ddee7608 | 1115 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); |
b3b94faa | 1116 | |
66fc061b | 1117 | rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr, 1); |
a365fbf3 | 1118 | if (!rgd) |
87654896 | 1119 | goto out_inodes; |
a365fbf3 | 1120 | |
ddee7608 RC |
1121 | gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2); |
1122 | ||
1123 | ||
8497a46e | 1124 | error = gfs2_glock_nq(ghs); /* parent */ |
b3b94faa | 1125 | if (error) |
8497a46e SW |
1126 | goto out_parent; |
1127 | ||
1128 | error = gfs2_glock_nq(ghs + 1); /* child */ | |
1129 | if (error) | |
1130 | goto out_child; | |
1131 | ||
d192a8e5 | 1132 | error = -ENOENT; |
855d23ce | 1133 | if (inode->i_nlink == 0) |
d192a8e5 SW |
1134 | goto out_rgrp; |
1135 | ||
855d23ce SW |
1136 | if (S_ISDIR(inode->i_mode)) { |
1137 | error = -ENOTEMPTY; | |
1138 | if (ip->i_entries > 2 || inode->i_nlink > 2) | |
1139 | goto out_rgrp; | |
1140 | } | |
1141 | ||
8497a46e SW |
1142 | error = gfs2_glock_nq(ghs + 2); /* rgrp */ |
1143 | if (error) | |
1144 | goto out_rgrp; | |
b3b94faa DT |
1145 | |
1146 | error = gfs2_unlink_ok(dip, &dentry->d_name, ip); | |
1147 | if (error) | |
72dbf479 | 1148 | goto out_gunlock; |
b3b94faa | 1149 | |
855d23ce | 1150 | error = gfs2_trans_begin(sdp, 2*RES_DINODE + 3*RES_LEAF + RES_RG_BIT, 0); |
855d23ce | 1151 | if (error) |
2eb5909d | 1152 | goto out_gunlock; |
b3b94faa | 1153 | |
4327a9bf | 1154 | error = gfs2_unlink_inode(dip, dentry); |
feaa7bba | 1155 | gfs2_trans_end(sdp); |
2eb5909d | 1156 | |
72dbf479 | 1157 | out_gunlock: |
8497a46e SW |
1158 | gfs2_glock_dq(ghs + 2); |
1159 | out_rgrp: | |
8497a46e SW |
1160 | gfs2_glock_dq(ghs + 1); |
1161 | out_child: | |
8497a46e SW |
1162 | gfs2_glock_dq(ghs); |
1163 | out_parent: | |
87654896 SW |
1164 | gfs2_holder_uninit(ghs + 2); |
1165 | out_inodes: | |
1166 | gfs2_holder_uninit(ghs + 1); | |
8497a46e | 1167 | gfs2_holder_uninit(ghs); |
b3b94faa DT |
1168 | return error; |
1169 | } | |
1170 | ||
1171 | /** | |
1172 | * gfs2_symlink - Create a symlink | |
1173 | * @dir: The directory to create the symlink in | |
1174 | * @dentry: The dentry to put the symlink in | |
1175 | * @symname: The thing which the link points to | |
1176 | * | |
1177 | * Returns: errno | |
1178 | */ | |
1179 | ||
1180 | static int gfs2_symlink(struct inode *dir, struct dentry *dentry, | |
1181 | const char *symname) | |
1182 | { | |
160b4026 | 1183 | unsigned int size; |
b3b94faa | 1184 | |
b3b94faa | 1185 | size = strlen(symname); |
235628c5 | 1186 | if (size >= gfs2_max_stuffed_size(GFS2_I(dir))) |
b3b94faa DT |
1187 | return -ENAMETOOLONG; |
1188 | ||
b452a458 | 1189 | return gfs2_create_inode(dir, dentry, NULL, S_IFLNK | S_IRWXUGO, 0, symname, size, 0); |
b3b94faa DT |
1190 | } |
1191 | ||
1192 | /** | |
1193 | * gfs2_mkdir - Make a directory | |
1194 | * @dir: The parent directory of the new one | |
1195 | * @dentry: The dentry of the new directory | |
1196 | * @mode: The mode of the new directory | |
1197 | * | |
1198 | * Returns: errno | |
1199 | */ | |
1200 | ||
18bb1db3 | 1201 | static int gfs2_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) |
b3b94faa | 1202 | { |
235628c5 | 1203 | unsigned dsize = gfs2_max_stuffed_size(GFS2_I(dir)); |
b452a458 | 1204 | return gfs2_create_inode(dir, dentry, NULL, S_IFDIR | mode, 0, NULL, dsize, 0); |
b3b94faa DT |
1205 | } |
1206 | ||
b3b94faa DT |
1207 | /** |
1208 | * gfs2_mknod - Make a special file | |
1209 | * @dir: The directory in which the special file will reside | |
1210 | * @dentry: The dentry of the special file | |
1211 | * @mode: The mode of the special file | |
f2741d98 | 1212 | * @dev: The device specification of the special file |
b3b94faa DT |
1213 | * |
1214 | */ | |
1215 | ||
1a67aafb | 1216 | static int gfs2_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, |
b3b94faa DT |
1217 | dev_t dev) |
1218 | { | |
b452a458 | 1219 | return gfs2_create_inode(dir, dentry, NULL, mode, dev, NULL, 0, 0); |
6d4ade98 SW |
1220 | } |
1221 | ||
1222 | /** | |
1223 | * gfs2_atomic_open - Atomically open a file | |
1224 | * @dir: The directory | |
1225 | * @dentry: The proposed new entry | |
1226 | * @file: The proposed new struct file | |
1227 | * @flags: open flags | |
1228 | * @mode: File mode | |
6d4ade98 SW |
1229 | * |
1230 | * Returns: error code or 0 for success | |
1231 | */ | |
1232 | ||
1233 | static int gfs2_atomic_open(struct inode *dir, struct dentry *dentry, | |
86fbca49 | 1234 | struct file *file, unsigned flags, |
44907d79 | 1235 | umode_t mode) |
6d4ade98 SW |
1236 | { |
1237 | struct dentry *d; | |
1238 | bool excl = !!(flags & O_EXCL); | |
1239 | ||
00699ad8 | 1240 | if (!d_in_lookup(dentry)) |
4d93bc3e AV |
1241 | goto skip_lookup; |
1242 | ||
b452a458 | 1243 | d = __gfs2_lookup(dir, dentry, file); |
6d4ade98 SW |
1244 | if (IS_ERR(d)) |
1245 | return PTR_ERR(d); | |
5ca1db41 MS |
1246 | if (d != NULL) |
1247 | dentry = d; | |
2b0143b5 | 1248 | if (d_really_is_positive(dentry)) { |
aad888f8 | 1249 | if (!(file->f_mode & FMODE_OPENED)) |
ec7d879c | 1250 | return finish_no_open(file, d); |
5ca1db41 | 1251 | dput(d); |
21039132 | 1252 | return excl && (flags & O_CREAT) ? -EEXIST : 0; |
6d4ade98 SW |
1253 | } |
1254 | ||
5ca1db41 | 1255 | BUG_ON(d != NULL); |
4d93bc3e AV |
1256 | |
1257 | skip_lookup: | |
6d4ade98 SW |
1258 | if (!(flags & O_CREAT)) |
1259 | return -ENOENT; | |
1260 | ||
b452a458 | 1261 | return gfs2_create_inode(dir, dentry, file, S_IFREG | mode, 0, NULL, 0, excl); |
b3b94faa DT |
1262 | } |
1263 | ||
0188d6c5 SW |
1264 | /* |
1265 | * gfs2_ok_to_move - check if it's ok to move a directory to another directory | |
1266 | * @this: move this | |
1267 | * @to: to here | |
1268 | * | |
1269 | * Follow @to back to the root and make sure we don't encounter @this | |
1270 | * Assumes we already hold the rename lock. | |
1271 | * | |
1272 | * Returns: errno | |
1273 | */ | |
1274 | ||
1275 | static int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to) | |
1276 | { | |
1277 | struct inode *dir = &to->i_inode; | |
1278 | struct super_block *sb = dir->i_sb; | |
1279 | struct inode *tmp; | |
0188d6c5 SW |
1280 | int error = 0; |
1281 | ||
0188d6c5 SW |
1282 | igrab(dir); |
1283 | ||
1284 | for (;;) { | |
1285 | if (dir == &this->i_inode) { | |
1286 | error = -EINVAL; | |
1287 | break; | |
1288 | } | |
2b0143b5 | 1289 | if (dir == d_inode(sb->s_root)) { |
0188d6c5 SW |
1290 | error = 0; |
1291 | break; | |
1292 | } | |
1293 | ||
8d123585 | 1294 | tmp = gfs2_lookupi(dir, &gfs2_qdotdot, 1); |
48f8f711 AD |
1295 | if (!tmp) { |
1296 | error = -ENOENT; | |
1297 | break; | |
1298 | } | |
0188d6c5 SW |
1299 | if (IS_ERR(tmp)) { |
1300 | error = PTR_ERR(tmp); | |
1301 | break; | |
1302 | } | |
1303 | ||
1304 | iput(dir); | |
1305 | dir = tmp; | |
1306 | } | |
1307 | ||
1308 | iput(dir); | |
1309 | ||
1310 | return error; | |
1311 | } | |
1312 | ||
a63b7bbc BM |
1313 | /** |
1314 | * update_moved_ino - Update an inode that's being moved | |
1315 | * @ip: The inode being moved | |
1316 | * @ndip: The parent directory of the new filename | |
1317 | * @dir_rename: True of ip is a directory | |
1318 | * | |
1319 | * Returns: errno | |
1320 | */ | |
1321 | ||
1322 | static int update_moved_ino(struct gfs2_inode *ip, struct gfs2_inode *ndip, | |
1323 | int dir_rename) | |
1324 | { | |
a63b7bbc BM |
1325 | if (dir_rename) |
1326 | return gfs2_dir_mvino(ip, &gfs2_qdotdot, ndip, DT_DIR); | |
1327 | ||
078cd827 | 1328 | ip->i_inode.i_ctime = current_time(&ip->i_inode); |
83998ccd | 1329 | mark_inode_dirty_sync(&ip->i_inode); |
a63b7bbc BM |
1330 | return 0; |
1331 | } | |
1332 | ||
1333 | ||
b3b94faa DT |
1334 | /** |
1335 | * gfs2_rename - Rename a file | |
1336 | * @odir: Parent directory of old file name | |
1337 | * @odentry: The old dentry of the file | |
1338 | * @ndir: Parent directory of new file name | |
1339 | * @ndentry: The new dentry of the file | |
1340 | * | |
1341 | * Returns: errno | |
1342 | */ | |
1343 | ||
1344 | static int gfs2_rename(struct inode *odir, struct dentry *odentry, | |
1345 | struct inode *ndir, struct dentry *ndentry) | |
1346 | { | |
feaa7bba SW |
1347 | struct gfs2_inode *odip = GFS2_I(odir); |
1348 | struct gfs2_inode *ndip = GFS2_I(ndir); | |
2b0143b5 | 1349 | struct gfs2_inode *ip = GFS2_I(d_inode(odentry)); |
b3b94faa | 1350 | struct gfs2_inode *nip = NULL; |
feaa7bba | 1351 | struct gfs2_sbd *sdp = GFS2_SB(odir); |
bc74aaef | 1352 | struct gfs2_holder ghs[4], r_gh, rd_gh; |
ddee7608 | 1353 | struct gfs2_rgrpd *nrgd; |
b3b94faa DT |
1354 | unsigned int num_gh; |
1355 | int dir_rename = 0; | |
19aeb5a6 | 1356 | struct gfs2_diradd da = { .nr_blocks = 0, .save_loc = 0, }; |
b3b94faa DT |
1357 | unsigned int x; |
1358 | int error; | |
1359 | ||
6df9f9a2 | 1360 | gfs2_holder_mark_uninitialized(&r_gh); |
bc74aaef | 1361 | gfs2_holder_mark_uninitialized(&rd_gh); |
2b0143b5 DH |
1362 | if (d_really_is_positive(ndentry)) { |
1363 | nip = GFS2_I(d_inode(ndentry)); | |
b3b94faa DT |
1364 | if (ip == nip) |
1365 | return 0; | |
1366 | } | |
1367 | ||
5e2f7d61 BP |
1368 | error = gfs2_rindex_update(sdp); |
1369 | if (error) | |
1370 | return error; | |
1371 | ||
2fba46a0 | 1372 | error = gfs2_qa_get(ndip); |
0a305e49 BP |
1373 | if (error) |
1374 | return error; | |
1375 | ||
0188d6c5 SW |
1376 | if (odip != ndip) { |
1377 | error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE, | |
1378 | 0, &r_gh); | |
b3b94faa DT |
1379 | if (error) |
1380 | goto out; | |
1381 | ||
0188d6c5 SW |
1382 | if (S_ISDIR(ip->i_inode.i_mode)) { |
1383 | dir_rename = 1; | |
a63b7bbc | 1384 | /* don't move a directory into its subdir */ |
0188d6c5 SW |
1385 | error = gfs2_ok_to_move(ip, ndip); |
1386 | if (error) | |
1387 | goto out_gunlock_r; | |
1388 | } | |
b3b94faa DT |
1389 | } |
1390 | ||
d9d1ca30 | 1391 | num_gh = 1; |
ad26967b | 1392 | gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs); |
d9d1ca30 | 1393 | if (odip != ndip) { |
ad26967b BP |
1394 | gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE,GL_ASYNC, |
1395 | ghs + num_gh); | |
d9d1ca30 SW |
1396 | num_gh++; |
1397 | } | |
ad26967b | 1398 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs + num_gh); |
d9d1ca30 | 1399 | num_gh++; |
b3b94faa | 1400 | |
d9d1ca30 | 1401 | if (nip) { |
ad26967b BP |
1402 | gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, |
1403 | ghs + num_gh); | |
d9d1ca30 SW |
1404 | num_gh++; |
1405 | } | |
b3b94faa | 1406 | |
72dbf479 BP |
1407 | for (x = 0; x < num_gh; x++) { |
1408 | error = gfs2_glock_nq(ghs + x); | |
1409 | if (error) | |
1410 | goto out_gunlock; | |
1411 | } | |
ad26967b BP |
1412 | error = gfs2_glock_async_wait(num_gh, ghs); |
1413 | if (error) | |
1414 | goto out_gunlock; | |
b3b94faa | 1415 | |
bc74aaef BP |
1416 | if (nip) { |
1417 | /* Grab the resource group glock for unlink flag twiddling. | |
1418 | * This is the case where the target dinode already exists | |
1419 | * so we unlink before doing the rename. | |
1420 | */ | |
1421 | nrgd = gfs2_blk2rgrpd(sdp, nip->i_no_addr, 1); | |
1422 | if (!nrgd) { | |
1423 | error = -ENOENT; | |
1424 | goto out_gunlock; | |
1425 | } | |
1426 | error = gfs2_glock_nq_init(nrgd->rd_gl, LM_ST_EXCLUSIVE, 0, | |
1427 | &rd_gh); | |
1428 | if (error) | |
1429 | goto out_gunlock; | |
1430 | } | |
1431 | ||
d192a8e5 SW |
1432 | error = -ENOENT; |
1433 | if (ip->i_inode.i_nlink == 0) | |
1434 | goto out_gunlock; | |
1435 | ||
b3b94faa DT |
1436 | /* Check out the old directory */ |
1437 | ||
1438 | error = gfs2_unlink_ok(odip, &odentry->d_name, ip); | |
1439 | if (error) | |
1440 | goto out_gunlock; | |
1441 | ||
1442 | /* Check out the new directory */ | |
1443 | ||
1444 | if (nip) { | |
1445 | error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip); | |
1446 | if (error) | |
1447 | goto out_gunlock; | |
1448 | ||
d192a8e5 SW |
1449 | if (nip->i_inode.i_nlink == 0) { |
1450 | error = -EAGAIN; | |
1451 | goto out_gunlock; | |
1452 | } | |
1453 | ||
b60623c2 | 1454 | if (S_ISDIR(nip->i_inode.i_mode)) { |
ad6203f2 | 1455 | if (nip->i_entries < 2) { |
94fb763b | 1456 | gfs2_consist_inode(nip); |
b3b94faa DT |
1457 | error = -EIO; |
1458 | goto out_gunlock; | |
1459 | } | |
ad6203f2 | 1460 | if (nip->i_entries > 2) { |
b3b94faa DT |
1461 | error = -ENOTEMPTY; |
1462 | goto out_gunlock; | |
1463 | } | |
1464 | } | |
1465 | } else { | |
10556cb2 | 1466 | error = gfs2_permission(ndir, MAY_WRITE | MAY_EXEC); |
b3b94faa DT |
1467 | if (error) |
1468 | goto out_gunlock; | |
1469 | ||
dbb7cae2 | 1470 | error = gfs2_dir_check(ndir, &ndentry->d_name, NULL); |
b3b94faa DT |
1471 | switch (error) { |
1472 | case -ENOENT: | |
1473 | error = 0; | |
1474 | break; | |
1475 | case 0: | |
1476 | error = -EEXIST; | |
1477 | default: | |
1478 | goto out_gunlock; | |
098b9c14 | 1479 | } |
b3b94faa DT |
1480 | |
1481 | if (odip != ndip) { | |
4f56110a | 1482 | if (!ndip->i_inode.i_nlink) { |
d192a8e5 | 1483 | error = -ENOENT; |
b3b94faa DT |
1484 | goto out_gunlock; |
1485 | } | |
ad6203f2 | 1486 | if (ndip->i_entries == (u32)-1) { |
b3b94faa DT |
1487 | error = -EFBIG; |
1488 | goto out_gunlock; | |
1489 | } | |
b60623c2 | 1490 | if (S_ISDIR(ip->i_inode.i_mode) && |
4f56110a | 1491 | ndip->i_inode.i_nlink == (u32)-1) { |
b3b94faa DT |
1492 | error = -EMLINK; |
1493 | goto out_gunlock; | |
1494 | } | |
1495 | } | |
1496 | } | |
1497 | ||
1498 | /* Check out the dir to be renamed */ | |
1499 | ||
1500 | if (dir_rename) { | |
2b0143b5 | 1501 | error = gfs2_permission(d_inode(odentry), MAY_WRITE); |
b3b94faa DT |
1502 | if (error) |
1503 | goto out_gunlock; | |
1504 | } | |
1505 | ||
3c1c0ae1 SW |
1506 | if (nip == NULL) { |
1507 | error = gfs2_diradd_alloc_required(ndir, &ndentry->d_name, &da); | |
1508 | if (error) | |
1509 | goto out_gunlock; | |
1510 | } | |
b3b94faa | 1511 | |
3c1c0ae1 SW |
1512 | if (da.nr_blocks) { |
1513 | struct gfs2_alloc_parms ap = { .target = da.nr_blocks, }; | |
b8fbf471 | 1514 | error = gfs2_quota_lock_check(ndip, &ap); |
b3b94faa | 1515 | if (error) |
5407e242 | 1516 | goto out_gunlock; |
b3b94faa | 1517 | |
7b9cff46 | 1518 | error = gfs2_inplace_reserve(ndip, &ap); |
b3b94faa DT |
1519 | if (error) |
1520 | goto out_gunlock_q; | |
1521 | ||
534cf9ca SW |
1522 | error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(ndip, &da, 4) + |
1523 | 4 * RES_LEAF + 4, 0); | |
b3b94faa DT |
1524 | if (error) |
1525 | goto out_ipreserv; | |
1526 | } else { | |
1527 | error = gfs2_trans_begin(sdp, 4 * RES_DINODE + | |
87d21e07 | 1528 | 5 * RES_LEAF + 4, 0); |
b3b94faa DT |
1529 | if (error) |
1530 | goto out_gunlock; | |
1531 | } | |
1532 | ||
1533 | /* Remove the target file, if it exists */ | |
1534 | ||
4327a9bf BP |
1535 | if (nip) |
1536 | error = gfs2_unlink_inode(ndip, ndentry); | |
b3b94faa | 1537 | |
a63b7bbc BM |
1538 | error = update_moved_ino(ip, ndip, dir_rename); |
1539 | if (error) | |
1540 | goto out_end_trans; | |
b3b94faa | 1541 | |
855d23ce | 1542 | error = gfs2_dir_del(odip, odentry); |
b3b94faa DT |
1543 | if (error) |
1544 | goto out_end_trans; | |
1545 | ||
2b47dad8 | 1546 | error = gfs2_dir_add(ndir, &ndentry->d_name, ip, &da); |
b3b94faa DT |
1547 | if (error) |
1548 | goto out_end_trans; | |
1549 | ||
feaa7bba | 1550 | out_end_trans: |
b3b94faa | 1551 | gfs2_trans_end(sdp); |
feaa7bba | 1552 | out_ipreserv: |
3c1c0ae1 | 1553 | if (da.nr_blocks) |
b3b94faa | 1554 | gfs2_inplace_release(ndip); |
feaa7bba | 1555 | out_gunlock_q: |
3c1c0ae1 | 1556 | if (da.nr_blocks) |
b3b94faa | 1557 | gfs2_quota_unlock(ndip); |
feaa7bba | 1558 | out_gunlock: |
2b47dad8 | 1559 | gfs2_dir_no_add(&da); |
bc74aaef BP |
1560 | if (gfs2_holder_initialized(&rd_gh)) |
1561 | gfs2_glock_dq_uninit(&rd_gh); | |
1562 | ||
72dbf479 | 1563 | while (x--) { |
ad26967b BP |
1564 | if (gfs2_holder_queued(ghs + x)) |
1565 | gfs2_glock_dq(ghs + x); | |
b3b94faa | 1566 | gfs2_holder_uninit(ghs + x); |
72dbf479 | 1567 | } |
feaa7bba | 1568 | out_gunlock_r: |
6df9f9a2 | 1569 | if (gfs2_holder_initialized(&r_gh)) |
b3b94faa | 1570 | gfs2_glock_dq_uninit(&r_gh); |
feaa7bba | 1571 | out: |
2fba46a0 | 1572 | gfs2_qa_put(ndip); |
b3b94faa DT |
1573 | return error; |
1574 | } | |
1575 | ||
a63b7bbc BM |
1576 | /** |
1577 | * gfs2_exchange - exchange two files | |
1578 | * @odir: Parent directory of old file name | |
1579 | * @odentry: The old dentry of the file | |
1580 | * @ndir: Parent directory of new file name | |
1581 | * @ndentry: The new dentry of the file | |
1582 | * @flags: The rename flags | |
1583 | * | |
1584 | * Returns: errno | |
1585 | */ | |
1586 | ||
1587 | static int gfs2_exchange(struct inode *odir, struct dentry *odentry, | |
1588 | struct inode *ndir, struct dentry *ndentry, | |
1589 | unsigned int flags) | |
1590 | { | |
1591 | struct gfs2_inode *odip = GFS2_I(odir); | |
1592 | struct gfs2_inode *ndip = GFS2_I(ndir); | |
1593 | struct gfs2_inode *oip = GFS2_I(odentry->d_inode); | |
1594 | struct gfs2_inode *nip = GFS2_I(ndentry->d_inode); | |
1595 | struct gfs2_sbd *sdp = GFS2_SB(odir); | |
ad26967b | 1596 | struct gfs2_holder ghs[4], r_gh; |
a63b7bbc BM |
1597 | unsigned int num_gh; |
1598 | unsigned int x; | |
1599 | umode_t old_mode = oip->i_inode.i_mode; | |
1600 | umode_t new_mode = nip->i_inode.i_mode; | |
1601 | int error; | |
1602 | ||
6df9f9a2 | 1603 | gfs2_holder_mark_uninitialized(&r_gh); |
a63b7bbc BM |
1604 | error = gfs2_rindex_update(sdp); |
1605 | if (error) | |
1606 | return error; | |
1607 | ||
1608 | if (odip != ndip) { | |
1609 | error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE, | |
1610 | 0, &r_gh); | |
1611 | if (error) | |
1612 | goto out; | |
1613 | ||
1614 | if (S_ISDIR(old_mode)) { | |
1615 | /* don't move a directory into its subdir */ | |
1616 | error = gfs2_ok_to_move(oip, ndip); | |
1617 | if (error) | |
1618 | goto out_gunlock_r; | |
1619 | } | |
1620 | ||
1621 | if (S_ISDIR(new_mode)) { | |
1622 | /* don't move a directory into its subdir */ | |
1623 | error = gfs2_ok_to_move(nip, odip); | |
1624 | if (error) | |
1625 | goto out_gunlock_r; | |
1626 | } | |
1627 | } | |
1628 | ||
1629 | num_gh = 1; | |
ad26967b | 1630 | gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs); |
a63b7bbc | 1631 | if (odip != ndip) { |
ad26967b BP |
1632 | gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, |
1633 | ghs + num_gh); | |
a63b7bbc BM |
1634 | num_gh++; |
1635 | } | |
ad26967b | 1636 | gfs2_holder_init(oip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs + num_gh); |
a63b7bbc BM |
1637 | num_gh++; |
1638 | ||
ad26967b | 1639 | gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs + num_gh); |
a63b7bbc BM |
1640 | num_gh++; |
1641 | ||
1642 | for (x = 0; x < num_gh; x++) { | |
1643 | error = gfs2_glock_nq(ghs + x); | |
1644 | if (error) | |
1645 | goto out_gunlock; | |
1646 | } | |
1647 | ||
ad26967b BP |
1648 | error = gfs2_glock_async_wait(num_gh, ghs); |
1649 | if (error) | |
1650 | goto out_gunlock; | |
1651 | ||
a63b7bbc BM |
1652 | error = -ENOENT; |
1653 | if (oip->i_inode.i_nlink == 0 || nip->i_inode.i_nlink == 0) | |
1654 | goto out_gunlock; | |
1655 | ||
1656 | error = gfs2_unlink_ok(odip, &odentry->d_name, oip); | |
1657 | if (error) | |
1658 | goto out_gunlock; | |
1659 | error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip); | |
1660 | if (error) | |
1661 | goto out_gunlock; | |
1662 | ||
1663 | if (S_ISDIR(old_mode)) { | |
1664 | error = gfs2_permission(odentry->d_inode, MAY_WRITE); | |
1665 | if (error) | |
1666 | goto out_gunlock; | |
1667 | } | |
1668 | if (S_ISDIR(new_mode)) { | |
1669 | error = gfs2_permission(ndentry->d_inode, MAY_WRITE); | |
1670 | if (error) | |
1671 | goto out_gunlock; | |
1672 | } | |
1673 | error = gfs2_trans_begin(sdp, 4 * RES_DINODE + 4 * RES_LEAF, 0); | |
1674 | if (error) | |
1675 | goto out_gunlock; | |
1676 | ||
1677 | error = update_moved_ino(oip, ndip, S_ISDIR(old_mode)); | |
1678 | if (error) | |
1679 | goto out_end_trans; | |
1680 | ||
1681 | error = update_moved_ino(nip, odip, S_ISDIR(new_mode)); | |
1682 | if (error) | |
1683 | goto out_end_trans; | |
1684 | ||
1685 | error = gfs2_dir_mvino(ndip, &ndentry->d_name, oip, | |
1686 | IF2DT(old_mode)); | |
1687 | if (error) | |
1688 | goto out_end_trans; | |
1689 | ||
1690 | error = gfs2_dir_mvino(odip, &odentry->d_name, nip, | |
1691 | IF2DT(new_mode)); | |
1692 | if (error) | |
1693 | goto out_end_trans; | |
1694 | ||
1695 | if (odip != ndip) { | |
1696 | if (S_ISDIR(new_mode) && !S_ISDIR(old_mode)) { | |
1697 | inc_nlink(&odip->i_inode); | |
1698 | drop_nlink(&ndip->i_inode); | |
1699 | } else if (S_ISDIR(old_mode) && !S_ISDIR(new_mode)) { | |
1700 | inc_nlink(&ndip->i_inode); | |
1701 | drop_nlink(&odip->i_inode); | |
1702 | } | |
1703 | } | |
1704 | mark_inode_dirty(&ndip->i_inode); | |
1705 | if (odip != ndip) | |
1706 | mark_inode_dirty(&odip->i_inode); | |
1707 | ||
1708 | out_end_trans: | |
1709 | gfs2_trans_end(sdp); | |
1710 | out_gunlock: | |
1711 | while (x--) { | |
ad26967b BP |
1712 | if (gfs2_holder_queued(ghs + x)) |
1713 | gfs2_glock_dq(ghs + x); | |
a63b7bbc BM |
1714 | gfs2_holder_uninit(ghs + x); |
1715 | } | |
1716 | out_gunlock_r: | |
6df9f9a2 | 1717 | if (gfs2_holder_initialized(&r_gh)) |
a63b7bbc BM |
1718 | gfs2_glock_dq_uninit(&r_gh); |
1719 | out: | |
1720 | return error; | |
1721 | } | |
1722 | ||
1723 | static int gfs2_rename2(struct inode *odir, struct dentry *odentry, | |
1724 | struct inode *ndir, struct dentry *ndentry, | |
1725 | unsigned int flags) | |
1726 | { | |
1727 | flags &= ~RENAME_NOREPLACE; | |
1728 | ||
1729 | if (flags & ~RENAME_EXCHANGE) | |
1730 | return -EINVAL; | |
1731 | ||
1732 | if (flags & RENAME_EXCHANGE) | |
1733 | return gfs2_exchange(odir, odentry, ndir, ndentry, flags); | |
1734 | ||
1735 | return gfs2_rename(odir, odentry, ndir, ndentry); | |
1736 | } | |
1737 | ||
536baf02 | 1738 | /** |
6b255391 | 1739 | * gfs2_get_link - Follow a symbolic link |
c177c2ac | 1740 | * @dentry: The dentry of the link |
6b255391 | 1741 | * @inode: The inode of the link |
fceef393 | 1742 | * @done: destructor for return value |
536baf02 | 1743 | * |
c177c2ac | 1744 | * This can handle symlinks of any size. |
536baf02 | 1745 | * |
c177c2ac | 1746 | * Returns: 0 on success or error code |
536baf02 SW |
1747 | */ |
1748 | ||
6b255391 | 1749 | static const char *gfs2_get_link(struct dentry *dentry, |
fceef393 AV |
1750 | struct inode *inode, |
1751 | struct delayed_call *done) | |
536baf02 | 1752 | { |
6b255391 | 1753 | struct gfs2_inode *ip = GFS2_I(inode); |
536baf02 SW |
1754 | struct gfs2_holder i_gh; |
1755 | struct buffer_head *dibh; | |
160b4026 | 1756 | unsigned int size; |
c177c2ac | 1757 | char *buf; |
536baf02 SW |
1758 | int error; |
1759 | ||
6b255391 AV |
1760 | if (!dentry) |
1761 | return ERR_PTR(-ECHILD); | |
1762 | ||
536baf02 SW |
1763 | gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh); |
1764 | error = gfs2_glock_nq(&i_gh); | |
1765 | if (error) { | |
1766 | gfs2_holder_uninit(&i_gh); | |
680baacb | 1767 | return ERR_PTR(error); |
536baf02 SW |
1768 | } |
1769 | ||
a2e0f799 SW |
1770 | size = (unsigned int)i_size_read(&ip->i_inode); |
1771 | if (size == 0) { | |
536baf02 | 1772 | gfs2_consist_inode(ip); |
c177c2ac | 1773 | buf = ERR_PTR(-EIO); |
536baf02 SW |
1774 | goto out; |
1775 | } | |
1776 | ||
1777 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
c177c2ac AV |
1778 | if (error) { |
1779 | buf = ERR_PTR(error); | |
536baf02 | 1780 | goto out; |
536baf02 SW |
1781 | } |
1782 | ||
160b4026 | 1783 | buf = kzalloc(size + 1, GFP_NOFS); |
c177c2ac AV |
1784 | if (!buf) |
1785 | buf = ERR_PTR(-ENOMEM); | |
1786 | else | |
160b4026 | 1787 | memcpy(buf, dibh->b_data + sizeof(struct gfs2_dinode), size); |
536baf02 SW |
1788 | brelse(dibh); |
1789 | out: | |
1790 | gfs2_glock_dq_uninit(&i_gh); | |
680baacb | 1791 | if (!IS_ERR(buf)) |
fceef393 | 1792 | set_delayed_call(done, kfree_link, buf); |
680baacb | 1793 | return buf; |
b3b94faa DT |
1794 | } |
1795 | ||
b3b94faa DT |
1796 | /** |
1797 | * gfs2_permission - | |
75d5cfbe SW |
1798 | * @inode: The inode |
1799 | * @mask: The mask to be tested | |
1800 | * @flags: Indicates whether this is an RCU path walk or not | |
b3b94faa | 1801 | * |
300c7d75 SW |
1802 | * This may be called from the VFS directly, or from within GFS2 with the |
1803 | * inode locked, so we look to see if the glock is already locked and only | |
1804 | * lock the glock if its not already been done. | |
1805 | * | |
b3b94faa DT |
1806 | * Returns: errno |
1807 | */ | |
1808 | ||
10556cb2 | 1809 | int gfs2_permission(struct inode *inode, int mask) |
b3b94faa | 1810 | { |
b74c79e9 | 1811 | struct gfs2_inode *ip; |
b3b94faa DT |
1812 | struct gfs2_holder i_gh; |
1813 | int error; | |
b74c79e9 | 1814 | |
6df9f9a2 | 1815 | gfs2_holder_mark_uninitialized(&i_gh); |
b74c79e9 | 1816 | ip = GFS2_I(inode); |
7afd88d9 | 1817 | if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) { |
2e60d768 BM |
1818 | if (mask & MAY_NOT_BLOCK) |
1819 | return -ECHILD; | |
1820 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh); | |
1821 | if (error) | |
1822 | return error; | |
300c7d75 | 1823 | } |
b3b94faa | 1824 | |
f58ba889 | 1825 | if ((mask & MAY_WRITE) && IS_IMMUTABLE(inode)) |
337684a1 | 1826 | error = -EPERM; |
f58ba889 | 1827 | else |
2830ba7f | 1828 | error = generic_permission(inode, mask); |
6df9f9a2 | 1829 | if (gfs2_holder_initialized(&i_gh)) |
b3b94faa | 1830 | gfs2_glock_dq_uninit(&i_gh); |
b3b94faa DT |
1831 | |
1832 | return error; | |
1833 | } | |
1834 | ||
ab9bbda0 | 1835 | static int __gfs2_setattr_simple(struct inode *inode, struct iattr *attr) |
194c011f | 1836 | { |
194c011f SW |
1837 | setattr_copy(inode, attr); |
1838 | mark_inode_dirty(inode); | |
194c011f SW |
1839 | return 0; |
1840 | } | |
1841 | ||
1842 | /** | |
1843 | * gfs2_setattr_simple - | |
1844 | * @ip: | |
1845 | * @attr: | |
1846 | * | |
1847 | * Returns: errno | |
1848 | */ | |
1849 | ||
ab9bbda0 | 1850 | int gfs2_setattr_simple(struct inode *inode, struct iattr *attr) |
194c011f SW |
1851 | { |
1852 | int error; | |
1853 | ||
1854 | if (current->journal_info) | |
ab9bbda0 | 1855 | return __gfs2_setattr_simple(inode, attr); |
194c011f | 1856 | |
ab9bbda0 | 1857 | error = gfs2_trans_begin(GFS2_SB(inode), RES_DINODE, 0); |
194c011f SW |
1858 | if (error) |
1859 | return error; | |
1860 | ||
ab9bbda0 SW |
1861 | error = __gfs2_setattr_simple(inode, attr); |
1862 | gfs2_trans_end(GFS2_SB(inode)); | |
194c011f SW |
1863 | return error; |
1864 | } | |
1865 | ||
b3b94faa DT |
1866 | static int setattr_chown(struct inode *inode, struct iattr *attr) |
1867 | { | |
feaa7bba SW |
1868 | struct gfs2_inode *ip = GFS2_I(inode); |
1869 | struct gfs2_sbd *sdp = GFS2_SB(inode); | |
7c06b5d6 EB |
1870 | kuid_t ouid, nuid; |
1871 | kgid_t ogid, ngid; | |
b3b94faa | 1872 | int error; |
b8fbf471 | 1873 | struct gfs2_alloc_parms ap; |
b3b94faa | 1874 | |
2933f925 SW |
1875 | ouid = inode->i_uid; |
1876 | ogid = inode->i_gid; | |
b3b94faa DT |
1877 | nuid = attr->ia_uid; |
1878 | ngid = attr->ia_gid; | |
1879 | ||
6b24c0d2 | 1880 | if (!(attr->ia_valid & ATTR_UID) || uid_eq(ouid, nuid)) |
f4108a60 | 1881 | ouid = nuid = NO_UID_QUOTA_CHANGE; |
6b24c0d2 | 1882 | if (!(attr->ia_valid & ATTR_GID) || gid_eq(ogid, ngid)) |
f4108a60 | 1883 | ogid = ngid = NO_GID_QUOTA_CHANGE; |
2fba46a0 | 1884 | error = gfs2_qa_get(ip); |
62e96cf8 | 1885 | if (error) |
2fba46a0 | 1886 | return error; |
62e96cf8 BP |
1887 | |
1888 | error = gfs2_rindex_update(sdp); | |
1889 | if (error) | |
1890 | goto out; | |
1891 | ||
1892 | error = gfs2_quota_lock(ip, nuid, ngid); | |
1893 | if (error) | |
1894 | goto out; | |
1895 | ||
b8fbf471 AD |
1896 | ap.target = gfs2_get_inode_blocks(&ip->i_inode); |
1897 | ||
6b24c0d2 EB |
1898 | if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) || |
1899 | !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) { | |
b8fbf471 | 1900 | error = gfs2_quota_check(ip, nuid, ngid, &ap); |
b3b94faa DT |
1901 | if (error) |
1902 | goto out_gunlock_q; | |
1903 | } | |
1904 | ||
1905 | error = gfs2_trans_begin(sdp, RES_DINODE + 2 * RES_QUOTA, 0); | |
1906 | if (error) | |
1907 | goto out_gunlock_q; | |
1908 | ||
ab9bbda0 | 1909 | error = gfs2_setattr_simple(inode, attr); |
b3b94faa DT |
1910 | if (error) |
1911 | goto out_end_trans; | |
1912 | ||
6b24c0d2 EB |
1913 | if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) || |
1914 | !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) { | |
39a72580 | 1915 | gfs2_quota_change(ip, -(s64)ap.target, ouid, ogid); |
b8fbf471 | 1916 | gfs2_quota_change(ip, ap.target, nuid, ngid); |
b3b94faa DT |
1917 | } |
1918 | ||
a91ea69f | 1919 | out_end_trans: |
b3b94faa | 1920 | gfs2_trans_end(sdp); |
a91ea69f | 1921 | out_gunlock_q: |
b3b94faa | 1922 | gfs2_quota_unlock(ip); |
62e96cf8 | 1923 | out: |
2fba46a0 | 1924 | gfs2_qa_put(ip); |
b3b94faa DT |
1925 | return error; |
1926 | } | |
1927 | ||
1928 | /** | |
1929 | * gfs2_setattr - Change attributes on an inode | |
1930 | * @dentry: The dentry which is changing | |
1931 | * @attr: The structure describing the change | |
1932 | * | |
1933 | * The VFS layer wants to change one or more of an inodes attributes. Write | |
1934 | * that change out to disk. | |
1935 | * | |
1936 | * Returns: errno | |
1937 | */ | |
1938 | ||
1939 | static int gfs2_setattr(struct dentry *dentry, struct iattr *attr) | |
1940 | { | |
2b0143b5 | 1941 | struct inode *inode = d_inode(dentry); |
feaa7bba | 1942 | struct gfs2_inode *ip = GFS2_I(inode); |
b3b94faa DT |
1943 | struct gfs2_holder i_gh; |
1944 | int error; | |
1945 | ||
2fba46a0 | 1946 | error = gfs2_qa_get(ip); |
0a305e49 BP |
1947 | if (error) |
1948 | return error; | |
1949 | ||
b3b94faa DT |
1950 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); |
1951 | if (error) | |
2fba46a0 | 1952 | goto out; |
b3b94faa DT |
1953 | |
1954 | error = -EPERM; | |
1955 | if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) | |
2fba46a0 | 1956 | goto error; |
b3b94faa | 1957 | |
31051c85 | 1958 | error = setattr_prepare(dentry, attr); |
b3b94faa | 1959 | if (error) |
2fba46a0 | 1960 | goto error; |
b3b94faa DT |
1961 | |
1962 | if (attr->ia_valid & ATTR_SIZE) | |
ff8f33c8 | 1963 | error = gfs2_setattr_size(inode, attr->ia_size); |
b3b94faa DT |
1964 | else if (attr->ia_valid & (ATTR_UID | ATTR_GID)) |
1965 | error = setattr_chown(inode, attr); | |
e01580bf | 1966 | else { |
ab9bbda0 | 1967 | error = gfs2_setattr_simple(inode, attr); |
e01580bf CH |
1968 | if (!error && attr->ia_valid & ATTR_MODE) |
1969 | error = posix_acl_chmod(inode, inode->i_mode); | |
1970 | } | |
b3b94faa | 1971 | |
2fba46a0 | 1972 | error: |
b3b94faa DT |
1973 | if (!error) |
1974 | mark_inode_dirty(inode); | |
ab9bbda0 | 1975 | gfs2_glock_dq_uninit(&i_gh); |
2fba46a0 BP |
1976 | out: |
1977 | gfs2_qa_put(ip); | |
b3b94faa DT |
1978 | return error; |
1979 | } | |
1980 | ||
1981 | /** | |
1982 | * gfs2_getattr - Read out an inode's attributes | |
a528d35e | 1983 | * @path: Object to query |
b3b94faa | 1984 | * @stat: The inode's stats |
a528d35e DH |
1985 | * @request_mask: Mask of STATX_xxx flags indicating the caller's interests |
1986 | * @flags: AT_STATX_xxx setting | |
b3b94faa | 1987 | * |
dcf3dd85 SW |
1988 | * This may be called from the VFS directly, or from within GFS2 with the |
1989 | * inode locked, so we look to see if the glock is already locked and only | |
1990 | * lock the glock if its not already been done. Note that its the NFS | |
1991 | * readdirplus operation which causes this to be called (from filldir) | |
1992 | * with the glock already held. | |
1993 | * | |
b3b94faa DT |
1994 | * Returns: errno |
1995 | */ | |
1996 | ||
a528d35e DH |
1997 | static int gfs2_getattr(const struct path *path, struct kstat *stat, |
1998 | u32 request_mask, unsigned int flags) | |
b3b94faa | 1999 | { |
a528d35e | 2000 | struct inode *inode = d_inode(path->dentry); |
feaa7bba | 2001 | struct gfs2_inode *ip = GFS2_I(inode); |
b3b94faa | 2002 | struct gfs2_holder gh; |
b2623c2f | 2003 | u32 gfsflags; |
b3b94faa DT |
2004 | int error; |
2005 | ||
6df9f9a2 | 2006 | gfs2_holder_mark_uninitialized(&gh); |
7afd88d9 | 2007 | if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) { |
2e60d768 BM |
2008 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); |
2009 | if (error) | |
2010 | return error; | |
b3b94faa DT |
2011 | } |
2012 | ||
b2623c2f AG |
2013 | gfsflags = ip->i_diskflags; |
2014 | if (gfsflags & GFS2_DIF_APPENDONLY) | |
2015 | stat->attributes |= STATX_ATTR_APPEND; | |
2016 | if (gfsflags & GFS2_DIF_IMMUTABLE) | |
2017 | stat->attributes |= STATX_ATTR_IMMUTABLE; | |
2018 | ||
2019 | stat->attributes_mask |= (STATX_ATTR_APPEND | | |
2020 | STATX_ATTR_COMPRESSED | | |
2021 | STATX_ATTR_ENCRYPTED | | |
2022 | STATX_ATTR_IMMUTABLE | | |
2023 | STATX_ATTR_NODUMP); | |
2024 | ||
dcf3dd85 | 2025 | generic_fillattr(inode, stat); |
b2623c2f | 2026 | |
6df9f9a2 | 2027 | if (gfs2_holder_initialized(&gh)) |
dcf3dd85 SW |
2028 | gfs2_glock_dq_uninit(&gh); |
2029 | ||
2030 | return 0; | |
b3b94faa DT |
2031 | } |
2032 | ||
e9079cce SW |
2033 | static int gfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, |
2034 | u64 start, u64 len) | |
2035 | { | |
2036 | struct gfs2_inode *ip = GFS2_I(inode); | |
2037 | struct gfs2_holder gh; | |
2038 | int ret; | |
2039 | ||
aac1a55b | 2040 | inode_lock_shared(inode); |
e9079cce SW |
2041 | |
2042 | ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh); | |
2043 | if (ret) | |
2044 | goto out; | |
2045 | ||
aac1a55b | 2046 | ret = iomap_fiemap(inode, fieinfo, start, len, &gfs2_iomap_ops); |
e9079cce SW |
2047 | |
2048 | gfs2_glock_dq_uninit(&gh); | |
aac1a55b | 2049 | |
e9079cce | 2050 | out: |
aac1a55b | 2051 | inode_unlock_shared(inode); |
e9079cce SW |
2052 | return ret; |
2053 | } | |
2054 | ||
3a27411c AG |
2055 | loff_t gfs2_seek_data(struct file *file, loff_t offset) |
2056 | { | |
2057 | struct inode *inode = file->f_mapping->host; | |
2058 | struct gfs2_inode *ip = GFS2_I(inode); | |
2059 | struct gfs2_holder gh; | |
2060 | loff_t ret; | |
2061 | ||
2062 | inode_lock_shared(inode); | |
2063 | ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh); | |
2064 | if (!ret) | |
2065 | ret = iomap_seek_data(inode, offset, &gfs2_iomap_ops); | |
2066 | gfs2_glock_dq_uninit(&gh); | |
2067 | inode_unlock_shared(inode); | |
2068 | ||
2069 | if (ret < 0) | |
2070 | return ret; | |
2071 | return vfs_setpos(file, ret, inode->i_sb->s_maxbytes); | |
2072 | } | |
2073 | ||
2074 | loff_t gfs2_seek_hole(struct file *file, loff_t offset) | |
2075 | { | |
2076 | struct inode *inode = file->f_mapping->host; | |
2077 | struct gfs2_inode *ip = GFS2_I(inode); | |
2078 | struct gfs2_holder gh; | |
2079 | loff_t ret; | |
2080 | ||
2081 | inode_lock_shared(inode); | |
2082 | ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh); | |
2083 | if (!ret) | |
2084 | ret = iomap_seek_hole(inode, offset, &gfs2_iomap_ops); | |
2085 | gfs2_glock_dq_uninit(&gh); | |
2086 | inode_unlock_shared(inode); | |
2087 | ||
2088 | if (ret < 0) | |
2089 | return ret; | |
2090 | return vfs_setpos(file, ret, inode->i_sb->s_maxbytes); | |
2091 | } | |
2092 | ||
92e1d5be | 2093 | const struct inode_operations gfs2_file_iops = { |
e6305c43 | 2094 | .permission = gfs2_permission, |
b3b94faa DT |
2095 | .setattr = gfs2_setattr, |
2096 | .getattr = gfs2_getattr, | |
b3b94faa | 2097 | .listxattr = gfs2_listxattr, |
e9079cce | 2098 | .fiemap = gfs2_fiemap, |
4e34e719 | 2099 | .get_acl = gfs2_get_acl, |
e01580bf | 2100 | .set_acl = gfs2_set_acl, |
b3b94faa DT |
2101 | }; |
2102 | ||
92e1d5be | 2103 | const struct inode_operations gfs2_dir_iops = { |
b3b94faa DT |
2104 | .create = gfs2_create, |
2105 | .lookup = gfs2_lookup, | |
2106 | .link = gfs2_link, | |
2107 | .unlink = gfs2_unlink, | |
2108 | .symlink = gfs2_symlink, | |
2109 | .mkdir = gfs2_mkdir, | |
855d23ce | 2110 | .rmdir = gfs2_unlink, |
b3b94faa | 2111 | .mknod = gfs2_mknod, |
2773bf00 | 2112 | .rename = gfs2_rename2, |
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, |
4e34e719 | 2118 | .get_acl = gfs2_get_acl, |
e01580bf | 2119 | .set_acl = gfs2_set_acl, |
6d4ade98 | 2120 | .atomic_open = gfs2_atomic_open, |
b3b94faa DT |
2121 | }; |
2122 | ||
92e1d5be | 2123 | const struct inode_operations gfs2_symlink_iops = { |
6b255391 | 2124 | .get_link = gfs2_get_link, |
e6305c43 | 2125 | .permission = gfs2_permission, |
b3b94faa DT |
2126 | .setattr = gfs2_setattr, |
2127 | .getattr = gfs2_getattr, | |
b3b94faa | 2128 | .listxattr = gfs2_listxattr, |
e9079cce | 2129 | .fiemap = gfs2_fiemap, |
b3b94faa DT |
2130 | }; |
2131 |