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> |
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 | ||
194c011f SW |
43 | /** |
44 | * gfs2_set_iop - Sets inode operations | |
45 | * @inode: The inode with correct i_mode filled in | |
46 | * | |
47 | * GFS2 lookup code fills in vfs inode contents based on info obtained | |
48 | * from directory entry inside gfs2_inode_lookup(). | |
49 | */ | |
50 | ||
51 | static void gfs2_set_iop(struct inode *inode) | |
52 | { | |
53 | struct gfs2_sbd *sdp = GFS2_SB(inode); | |
54 | umode_t mode = inode->i_mode; | |
55 | ||
56 | if (S_ISREG(mode)) { | |
57 | inode->i_op = &gfs2_file_iops; | |
58 | if (gfs2_localflocks(sdp)) | |
59 | inode->i_fop = &gfs2_file_fops_nolock; | |
60 | else | |
61 | inode->i_fop = &gfs2_file_fops; | |
62 | } else if (S_ISDIR(mode)) { | |
63 | inode->i_op = &gfs2_dir_iops; | |
64 | if (gfs2_localflocks(sdp)) | |
65 | inode->i_fop = &gfs2_dir_fops_nolock; | |
66 | else | |
67 | inode->i_fop = &gfs2_dir_fops; | |
68 | } else if (S_ISLNK(mode)) { | |
69 | inode->i_op = &gfs2_symlink_iops; | |
70 | } else { | |
71 | inode->i_op = &gfs2_file_iops; | |
72 | init_special_inode(inode, inode->i_mode, inode->i_rdev); | |
73 | } | |
74 | } | |
75 | ||
5f6e13ba AG |
76 | static int iget_test(struct inode *inode, void *opaque) |
77 | { | |
78 | u64 no_addr = *(u64 *)opaque; | |
79 | ||
80 | return GFS2_I(inode)->i_no_addr == no_addr; | |
81 | } | |
82 | ||
83 | static int iget_set(struct inode *inode, void *opaque) | |
84 | { | |
85 | u64 no_addr = *(u64 *)opaque; | |
86 | ||
87 | GFS2_I(inode)->i_no_addr = no_addr; | |
88 | inode->i_ino = no_addr; | |
89 | return 0; | |
90 | } | |
91 | ||
194c011f SW |
92 | /** |
93 | * gfs2_inode_lookup - Lookup an inode | |
94 | * @sb: The super block | |
194c011f | 95 | * @type: The type of the inode |
3ce37b2c AG |
96 | * @no_addr: The inode number |
97 | * @no_formal_ino: The inode generation number | |
98 | * @blktype: Requested block type (GFS2_BLKST_DINODE or GFS2_BLKST_UNLINKED; | |
61b91cfd | 99 | * GFS2_BLKST_FREE to indicate not to verify) |
3ce37b2c AG |
100 | * |
101 | * If @type is DT_UNKNOWN, the inode type is fetched from disk. | |
102 | * | |
103 | * If @blktype is anything other than GFS2_BLKST_FREE (which is used as a | |
104 | * placeholder because it doesn't otherwise make sense), the on-disk block type | |
105 | * is verified to be @blktype. | |
194c011f | 106 | * |
b66648ad AG |
107 | * When @no_formal_ino is non-zero, this function will return ERR_PTR(-ESTALE) |
108 | * if it detects that @no_formal_ino doesn't match the actual inode generation | |
109 | * number. However, it doesn't always know unless @type is DT_UNKNOWN. | |
110 | * | |
194c011f SW |
111 | * Returns: A VFS inode, or an error |
112 | */ | |
113 | ||
114 | struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned int type, | |
3ce37b2c AG |
115 | u64 no_addr, u64 no_formal_ino, |
116 | unsigned int blktype) | |
194c011f SW |
117 | { |
118 | struct inode *inode; | |
119 | struct gfs2_inode *ip; | |
3ce37b2c | 120 | struct gfs2_holder i_gh; |
194c011f SW |
121 | int error; |
122 | ||
6df9f9a2 | 123 | gfs2_holder_mark_uninitialized(&i_gh); |
5f6e13ba | 124 | inode = iget5_locked(sb, no_addr, iget_test, iget_set, &no_addr); |
194c011f | 125 | if (!inode) |
ac3beb6a | 126 | return ERR_PTR(-ENOMEM); |
194c011f | 127 | |
e97321fa | 128 | ip = GFS2_I(inode); |
e97321fa | 129 | |
194c011f SW |
130 | if (inode->i_state & I_NEW) { |
131 | struct gfs2_sbd *sdp = GFS2_SB(inode); | |
5f6e13ba | 132 | struct gfs2_glock *io_gl; |
c412a97c | 133 | int extra_flags = 0; |
194c011f | 134 | |
29464ee3 AG |
135 | error = gfs2_glock_get(sdp, no_addr, &gfs2_inode_glops, CREATE, |
136 | &ip->i_gl); | |
137 | if (unlikely(error)) | |
138 | goto fail; | |
139 | ||
140 | error = gfs2_glock_get(sdp, no_addr, &gfs2_iopen_glops, CREATE, | |
141 | &io_gl); | |
142 | if (unlikely(error)) | |
143 | goto fail; | |
144 | ||
2ec750a0 AG |
145 | /* |
146 | * The only caller that sets @blktype to GFS2_BLKST_UNLINKED is | |
147 | * delete_work_func(). Make sure not to cancel the delete work | |
148 | * from within itself here. | |
149 | */ | |
c412a97c BP |
150 | if (blktype == GFS2_BLKST_UNLINKED) |
151 | extra_flags |= LM_FLAG_TRY; | |
152 | else | |
29464ee3 | 153 | gfs2_cancel_delete_work(io_gl); |
c412a97c | 154 | error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, |
c7d7d2d3 | 155 | GL_EXACT | GL_NOPID | extra_flags, |
29464ee3 AG |
156 | &ip->i_iopen_gh); |
157 | gfs2_glock_put(io_gl); | |
194c011f SW |
158 | if (unlikely(error)) |
159 | goto fail; | |
194c011f | 160 | |
3ce37b2c AG |
161 | if (type == DT_UNKNOWN || blktype != GFS2_BLKST_FREE) { |
162 | /* | |
163 | * The GL_SKIP flag indicates to skip reading the inode | |
5f6e13ba | 164 | * block. We read the inode when instantiating it |
3ce37b2c AG |
165 | * after possibly checking the block type. |
166 | */ | |
167 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, | |
168 | GL_SKIP, &i_gh); | |
169 | if (error) | |
40e7e86e | 170 | goto fail; |
3ce37b2c | 171 | |
b66648ad AG |
172 | error = -ESTALE; |
173 | if (no_formal_ino && | |
174 | gfs2_inode_already_deleted(ip->i_gl, no_formal_ino)) | |
175 | goto fail; | |
176 | ||
3ce37b2c AG |
177 | if (blktype != GFS2_BLKST_FREE) { |
178 | error = gfs2_check_blk_type(sdp, no_addr, | |
179 | blktype); | |
180 | if (error) | |
40e7e86e | 181 | goto fail; |
3ce37b2c AG |
182 | } |
183 | } | |
184 | ||
f2e70d8f | 185 | set_bit(GLF_INSTANTIATE_NEEDED, &ip->i_gl->gl_flags); |
5f6e13ba | 186 | |
2b0fb353 | 187 | /* Lowest possible timestamp; will be overwritten in gfs2_dinode_in. */ |
580f721b JL |
188 | inode_set_atime(inode, |
189 | 1LL << (8 * sizeof(inode_get_atime_sec(inode)) - 1), | |
190 | 0); | |
2b0fb353 | 191 | |
5f6e13ba AG |
192 | glock_set_object(ip->i_gl, ip); |
193 | ||
194c011f SW |
194 | if (type == DT_UNKNOWN) { |
195 | /* Inode glock must be locked already */ | |
f2e70d8f | 196 | error = gfs2_instantiate(&i_gh); |
5f6e13ba AG |
197 | if (error) { |
198 | glock_clear_object(ip->i_gl, ip); | |
40e7e86e | 199 | goto fail; |
5f6e13ba | 200 | } |
194c011f | 201 | } else { |
2b0fb353 | 202 | ip->i_no_formal_ino = no_formal_ino; |
194c011f SW |
203 | inode->i_mode = DT2IF(type); |
204 | } | |
205 | ||
b66648ad AG |
206 | if (gfs2_holder_initialized(&i_gh)) |
207 | gfs2_glock_dq_uninit(&i_gh); | |
5f6e13ba | 208 | glock_set_object(ip->i_iopen_gh.gh_gl, ip); |
b66648ad | 209 | |
194c011f | 210 | gfs2_set_iop(inode); |
b8e12e35 | 211 | unlock_new_inode(inode); |
b66648ad | 212 | } |
332f51d7 | 213 | |
b66648ad AG |
214 | if (no_formal_ino && ip->i_no_formal_ino && |
215 | no_formal_ino != ip->i_no_formal_ino) { | |
b66648ad | 216 | iput(inode); |
b8e12e35 | 217 | return ERR_PTR(-ESTALE); |
194c011f SW |
218 | } |
219 | ||
220 | return inode; | |
221 | ||
40e7e86e | 222 | fail: |
c412a97c BP |
223 | if (error == GLR_TRYFAILED) |
224 | error = -EAGAIN; | |
5f6e13ba | 225 | if (gfs2_holder_initialized(&ip->i_iopen_gh)) |
763766c0 | 226 | gfs2_glock_dq_uninit(&ip->i_iopen_gh); |
6df9f9a2 | 227 | if (gfs2_holder_initialized(&i_gh)) |
3ce37b2c | 228 | gfs2_glock_dq_uninit(&i_gh); |
9ffa1888 AG |
229 | if (ip->i_gl) { |
230 | gfs2_glock_put(ip->i_gl); | |
231 | ip->i_gl = NULL; | |
232 | } | |
194c011f SW |
233 | iget_failed(inode); |
234 | return ERR_PTR(error); | |
235 | } | |
236 | ||
6bdcadea AG |
237 | /** |
238 | * gfs2_lookup_by_inum - look up an inode by inode number | |
239 | * @sdp: The super block | |
240 | * @no_addr: The inode number | |
241 | * @no_formal_ino: The inode generation number (0 for any) | |
242 | * @blktype: Requested block type (see gfs2_inode_lookup) | |
243 | */ | |
194c011f | 244 | struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr, |
6bdcadea | 245 | u64 no_formal_ino, unsigned int blktype) |
194c011f SW |
246 | { |
247 | struct super_block *sb = sdp->sd_vfs; | |
3ce37b2c | 248 | struct inode *inode; |
194c011f SW |
249 | int error; |
250 | ||
b66648ad AG |
251 | inode = gfs2_inode_lookup(sb, DT_UNKNOWN, no_addr, no_formal_ino, |
252 | blktype); | |
194c011f | 253 | if (IS_ERR(inode)) |
3ce37b2c | 254 | return inode; |
194c011f | 255 | |
194c011f | 256 | if (no_formal_ino) { |
194c011f SW |
257 | error = -EIO; |
258 | if (GFS2_I(inode)->i_diskflags & GFS2_DIF_SYSTEM) | |
259 | goto fail_iput; | |
194c011f | 260 | } |
3ce37b2c | 261 | return inode; |
194c011f | 262 | |
194c011f SW |
263 | fail_iput: |
264 | iput(inode); | |
3ce37b2c | 265 | return ERR_PTR(error); |
194c011f SW |
266 | } |
267 | ||
268 | ||
062fb903 AG |
269 | /** |
270 | * gfs2_lookup_meta - Look up an inode in a metadata directory | |
271 | * @dip: The directory | |
272 | * @name: The name of the inode | |
273 | */ | |
274 | struct inode *gfs2_lookup_meta(struct inode *dip, const char *name) | |
194c011f SW |
275 | { |
276 | struct qstr qstr; | |
277 | struct inode *inode; | |
062fb903 | 278 | |
194c011f SW |
279 | gfs2_str2qstr(&qstr, name); |
280 | inode = gfs2_lookupi(dip, &qstr, 1); | |
111c7d27 AG |
281 | if (IS_ERR_OR_NULL(inode)) |
282 | return inode ? inode : ERR_PTR(-ENOENT); | |
283 | ||
284 | /* | |
285 | * Must not call back into the filesystem when allocating | |
286 | * pages in the metadata inode's address space. | |
287 | */ | |
288 | mapping_set_gfp_mask(inode->i_mapping, GFP_NOFS); | |
289 | ||
290 | return inode; | |
194c011f SW |
291 | } |
292 | ||
293 | ||
294 | /** | |
295 | * gfs2_lookupi - Look up a filename in a directory and return its inode | |
c551f66c | 296 | * @dir: The inode of the directory containing the inode to look-up |
194c011f SW |
297 | * @name: The name of the inode to look for |
298 | * @is_root: If 1, ignore the caller's permissions | |
194c011f SW |
299 | * |
300 | * This can be called via the VFS filldir function when NFS is doing | |
301 | * a readdirplus and the inode which its intending to stat isn't | |
302 | * already in cache. In this case we must not take the directory glock | |
303 | * again, since the readdir call will have already taken that lock. | |
304 | * | |
305 | * Returns: errno | |
306 | */ | |
307 | ||
308 | struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name, | |
309 | int is_root) | |
310 | { | |
311 | struct super_block *sb = dir->i_sb; | |
312 | struct gfs2_inode *dip = GFS2_I(dir); | |
313 | struct gfs2_holder d_gh; | |
314 | int error = 0; | |
315 | struct inode *inode = NULL; | |
194c011f | 316 | |
6df9f9a2 | 317 | gfs2_holder_mark_uninitialized(&d_gh); |
194c011f SW |
318 | if (!name->len || name->len > GFS2_FNAMESIZE) |
319 | return ERR_PTR(-ENAMETOOLONG); | |
320 | ||
321 | if ((name->len == 1 && memcmp(name->name, ".", 1) == 0) || | |
322 | (name->len == 2 && memcmp(name->name, "..", 2) == 0 && | |
2b0143b5 | 323 | dir == d_inode(sb->s_root))) { |
194c011f SW |
324 | igrab(dir); |
325 | return dir; | |
326 | } | |
327 | ||
328 | if (gfs2_glock_is_locked_by_me(dip->i_gl) == NULL) { | |
329 | error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh); | |
330 | if (error) | |
331 | return ERR_PTR(error); | |
194c011f SW |
332 | } |
333 | ||
334 | if (!is_root) { | |
4609e1f1 | 335 | error = gfs2_permission(&nop_mnt_idmap, dir, MAY_EXEC); |
194c011f SW |
336 | if (error) |
337 | goto out; | |
338 | } | |
339 | ||
5a00f3cc | 340 | inode = gfs2_dir_search(dir, name, false); |
194c011f SW |
341 | if (IS_ERR(inode)) |
342 | error = PTR_ERR(inode); | |
343 | out: | |
6df9f9a2 | 344 | if (gfs2_holder_initialized(&d_gh)) |
194c011f SW |
345 | gfs2_glock_dq_uninit(&d_gh); |
346 | if (error == -ENOENT) | |
347 | return NULL; | |
348 | return inode ? inode : ERR_PTR(error); | |
349 | } | |
350 | ||
351 | /** | |
352 | * create_ok - OK to create a new on-disk inode here? | |
353 | * @dip: Directory in which dinode is to be created | |
354 | * @name: Name of new dinode | |
355 | * @mode: | |
356 | * | |
357 | * Returns: errno | |
358 | */ | |
359 | ||
360 | static int create_ok(struct gfs2_inode *dip, const struct qstr *name, | |
175a4eb7 | 361 | umode_t mode) |
194c011f SW |
362 | { |
363 | int error; | |
364 | ||
4609e1f1 | 365 | error = gfs2_permission(&nop_mnt_idmap, &dip->i_inode, |
549c7297 | 366 | MAY_WRITE | MAY_EXEC); |
194c011f SW |
367 | if (error) |
368 | return error; | |
369 | ||
370 | /* Don't create entries in an unlinked directory */ | |
371 | if (!dip->i_inode.i_nlink) | |
372 | return -ENOENT; | |
373 | ||
194c011f SW |
374 | if (dip->i_entries == (u32)-1) |
375 | return -EFBIG; | |
376 | if (S_ISDIR(mode) && dip->i_inode.i_nlink == (u32)-1) | |
377 | return -EMLINK; | |
378 | ||
379 | return 0; | |
380 | } | |
381 | ||
c9aecf73 SW |
382 | static void munge_mode_uid_gid(const struct gfs2_inode *dip, |
383 | struct inode *inode) | |
194c011f SW |
384 | { |
385 | if (GFS2_SB(&dip->i_inode)->sd_args.ar_suiddir && | |
6b24c0d2 EB |
386 | (dip->i_inode.i_mode & S_ISUID) && |
387 | !uid_eq(dip->i_inode.i_uid, GLOBAL_ROOT_UID)) { | |
c9aecf73 SW |
388 | if (S_ISDIR(inode->i_mode)) |
389 | inode->i_mode |= S_ISUID; | |
6b24c0d2 | 390 | else if (!uid_eq(dip->i_inode.i_uid, current_fsuid())) |
c9aecf73 SW |
391 | inode->i_mode &= ~07111; |
392 | inode->i_uid = dip->i_inode.i_uid; | |
194c011f | 393 | } else |
c9aecf73 | 394 | inode->i_uid = current_fsuid(); |
194c011f SW |
395 | |
396 | if (dip->i_inode.i_mode & S_ISGID) { | |
c9aecf73 SW |
397 | if (S_ISDIR(inode->i_mode)) |
398 | inode->i_mode |= S_ISGID; | |
399 | inode->i_gid = dip->i_inode.i_gid; | |
194c011f | 400 | } else |
c9aecf73 | 401 | inode->i_gid = current_fsgid(); |
194c011f SW |
402 | } |
403 | ||
b2c8b3ea | 404 | static int alloc_dinode(struct gfs2_inode *ip, u32 flags, unsigned *dblocks) |
194c011f | 405 | { |
c9aecf73 | 406 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b2c8b3ea | 407 | struct gfs2_alloc_parms ap = { .target = *dblocks, .aflags = flags, }; |
194c011f SW |
408 | int error; |
409 | ||
b8fbf471 | 410 | error = gfs2_quota_lock_check(ip, &ap); |
194c011f SW |
411 | if (error) |
412 | goto out; | |
413 | ||
7b9cff46 | 414 | error = gfs2_inplace_reserve(ip, &ap); |
fd4b4e04 SW |
415 | if (error) |
416 | goto out_quota; | |
417 | ||
b2c8b3ea | 418 | error = gfs2_trans_begin(sdp, (*dblocks * RES_RG_BIT) + RES_STATFS + RES_QUOTA, 0); |
194c011f SW |
419 | if (error) |
420 | goto out_ipreserv; | |
421 | ||
4c7b3f7f | 422 | error = gfs2_alloc_blocks(ip, &ip->i_no_addr, dblocks, 1); |
35c23fba AG |
423 | if (error) |
424 | goto out_trans_end; | |
425 | ||
c9aecf73 SW |
426 | ip->i_no_formal_ino = ip->i_generation; |
427 | ip->i_inode.i_ino = ip->i_no_addr; | |
428 | ip->i_goal = ip->i_no_addr; | |
38552ff6 AG |
429 | if (*dblocks > 1) |
430 | ip->i_eattr = ip->i_no_addr + 1; | |
194c011f | 431 | |
35c23fba | 432 | out_trans_end: |
194c011f | 433 | gfs2_trans_end(sdp); |
194c011f | 434 | out_ipreserv: |
c9aecf73 | 435 | gfs2_inplace_release(ip); |
fd4b4e04 SW |
436 | out_quota: |
437 | gfs2_quota_unlock(ip); | |
194c011f | 438 | out: |
194c011f SW |
439 | return error; |
440 | } | |
441 | ||
f2741d98 SW |
442 | static void gfs2_init_dir(struct buffer_head *dibh, |
443 | const struct gfs2_inode *parent) | |
e2d0a13b SW |
444 | { |
445 | struct gfs2_dinode *di = (struct gfs2_dinode *)dibh->b_data; | |
446 | struct gfs2_dirent *dent = (struct gfs2_dirent *)(di+1); | |
447 | ||
448 | gfs2_qstr2dirent(&gfs2_qdot, GFS2_DIRENT_SIZE(gfs2_qdot.len), dent); | |
449 | dent->de_inum = di->di_num; /* already GFS2 endian */ | |
450 | dent->de_type = cpu_to_be16(DT_DIR); | |
451 | ||
452 | dent = (struct gfs2_dirent *)((char*)dent + GFS2_DIRENT_SIZE(1)); | |
453 | gfs2_qstr2dirent(&gfs2_qdotdot, dibh->b_size - GFS2_DIRENT_SIZE(1) - sizeof(struct gfs2_dinode), dent); | |
454 | gfs2_inum_out(parent, dent); | |
455 | dent->de_type = cpu_to_be16(DT_DIR); | |
456 | ||
457 | } | |
458 | ||
b2c8b3ea SW |
459 | /** |
460 | * gfs2_init_xattr - Initialise an xattr block for a new inode | |
461 | * @ip: The inode in question | |
462 | * | |
463 | * This sets up an empty xattr block for a new inode, ready to | |
464 | * take any ACLs, LSM xattrs, etc. | |
465 | */ | |
466 | ||
467 | static void gfs2_init_xattr(struct gfs2_inode *ip) | |
468 | { | |
469 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); | |
470 | struct buffer_head *bh; | |
471 | struct gfs2_ea_header *ea; | |
472 | ||
473 | bh = gfs2_meta_new(ip->i_gl, ip->i_eattr); | |
474 | gfs2_trans_add_meta(ip->i_gl, bh); | |
475 | gfs2_metatype_set(bh, GFS2_METATYPE_EA, GFS2_FORMAT_EA); | |
476 | gfs2_buffer_clear_tail(bh, sizeof(struct gfs2_meta_header)); | |
477 | ||
478 | ea = GFS2_EA_BH2FIRST(bh); | |
479 | ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize); | |
480 | ea->ea_type = GFS2_EATYPE_UNUSED; | |
481 | ea->ea_flags = GFS2_EAFLAG_LAST; | |
482 | ||
483 | brelse(bh); | |
484 | } | |
485 | ||
194c011f SW |
486 | /** |
487 | * init_dinode - Fill in a new dinode structure | |
f2741d98 | 488 | * @dip: The directory this inode is being created in |
c9aecf73 | 489 | * @ip: The inode |
f2741d98 | 490 | * @symname: The symlink destination (if a symlink) |
194c011f SW |
491 | * |
492 | */ | |
493 | ||
c9aecf73 | 494 | static void init_dinode(struct gfs2_inode *dip, struct gfs2_inode *ip, |
79ba7480 | 495 | const char *symname) |
194c011f | 496 | { |
194c011f SW |
497 | struct gfs2_dinode *di; |
498 | struct buffer_head *dibh; | |
194c011f | 499 | |
c9aecf73 | 500 | dibh = gfs2_meta_new(ip->i_gl, ip->i_no_addr); |
350a9b0a | 501 | gfs2_trans_add_meta(ip->i_gl, dibh); |
194c011f | 502 | di = (struct gfs2_dinode *)dibh->b_data; |
79ba7480 | 503 | gfs2_dinode_out(ip, di); |
194c011f | 504 | |
6f24784f AV |
505 | di->di_major = cpu_to_be32(imajor(&ip->i_inode)); |
506 | di->di_minor = cpu_to_be32(iminor(&ip->i_inode)); | |
194c011f | 507 | di->__pad1 = 0; |
194c011f SW |
508 | di->__pad2 = 0; |
509 | di->__pad3 = 0; | |
194c011f | 510 | memset(&di->__pad4, 0, sizeof(di->__pad4)); |
194c011f | 511 | memset(&di->di_reserved, 0, sizeof(di->di_reserved)); |
79ba7480 | 512 | gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode)); |
160b4026 | 513 | |
c9aecf73 | 514 | switch(ip->i_inode.i_mode & S_IFMT) { |
160b4026 | 515 | case S_IFDIR: |
e2d0a13b | 516 | gfs2_init_dir(dibh, dip); |
160b4026 SW |
517 | break; |
518 | case S_IFLNK: | |
c9aecf73 | 519 | memcpy(dibh->b_data + sizeof(struct gfs2_dinode), symname, ip->i_inode.i_size); |
160b4026 | 520 | break; |
e2d0a13b SW |
521 | } |
522 | ||
194c011f | 523 | set_buffer_uptodate(dibh); |
79ba7480 | 524 | brelse(dibh); |
194c011f SW |
525 | } |
526 | ||
534cf9ca | 527 | /** |
c551f66c | 528 | * gfs2_trans_da_blks - Calculate number of blocks to link inode |
534cf9ca SW |
529 | * @dip: The directory we are linking into |
530 | * @da: The dir add information | |
531 | * @nr_inodes: The number of inodes involved | |
532 | * | |
533 | * This calculate the number of blocks we need to reserve in a | |
534 | * transaction to link @nr_inodes into a directory. In most cases | |
535 | * @nr_inodes will be 2 (the directory plus the inode being linked in) | |
536 | * but in case of rename, 4 may be required. | |
537 | * | |
538 | * Returns: Number of blocks | |
539 | */ | |
540 | ||
541 | static unsigned gfs2_trans_da_blks(const struct gfs2_inode *dip, | |
542 | const struct gfs2_diradd *da, | |
543 | unsigned nr_inodes) | |
544 | { | |
545 | return da->nr_blocks + gfs2_rg_blocks(dip, da->nr_blocks) + | |
546 | (nr_inodes * RES_DINODE) + RES_QUOTA + RES_STATFS; | |
547 | } | |
548 | ||
194c011f | 549 | static int link_dinode(struct gfs2_inode *dip, const struct qstr *name, |
3c1c0ae1 | 550 | struct gfs2_inode *ip, struct gfs2_diradd *da) |
194c011f SW |
551 | { |
552 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); | |
3c1c0ae1 | 553 | struct gfs2_alloc_parms ap = { .target = da->nr_blocks, }; |
194c011f SW |
554 | int error; |
555 | ||
3c1c0ae1 | 556 | if (da->nr_blocks) { |
b8fbf471 | 557 | error = gfs2_quota_lock_check(dip, &ap); |
194c011f SW |
558 | if (error) |
559 | goto fail_quota_locks; | |
560 | ||
7b9cff46 | 561 | error = gfs2_inplace_reserve(dip, &ap); |
194c011f SW |
562 | if (error) |
563 | goto fail_quota_locks; | |
564 | ||
534cf9ca | 565 | error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, da, 2), 0); |
194c011f SW |
566 | if (error) |
567 | goto fail_ipreserv; | |
568 | } else { | |
569 | error = gfs2_trans_begin(sdp, RES_LEAF + 2 * RES_DINODE, 0); | |
570 | if (error) | |
571 | goto fail_quota_locks; | |
572 | } | |
573 | ||
2b47dad8 | 574 | error = gfs2_dir_add(&dip->i_inode, name, ip, da); |
194c011f | 575 | |
194c011f | 576 | gfs2_trans_end(sdp); |
194c011f | 577 | fail_ipreserv: |
fd4b4e04 | 578 | gfs2_inplace_release(dip); |
194c011f SW |
579 | fail_quota_locks: |
580 | gfs2_quota_unlock(dip); | |
194c011f SW |
581 | return error; |
582 | } | |
583 | ||
46cc1e5f | 584 | static int gfs2_initxattrs(struct inode *inode, const struct xattr *xattr_array, |
9d8f13ba | 585 | void *fs_info) |
194c011f | 586 | { |
9d8f13ba MZ |
587 | const struct xattr *xattr; |
588 | int err = 0; | |
589 | ||
590 | for (xattr = xattr_array; xattr->name != NULL; xattr++) { | |
591 | err = __gfs2_xattr_set(inode, xattr->name, xattr->value, | |
592 | xattr->value_len, 0, | |
593 | GFS2_EATYPE_SECURITY); | |
594 | if (err < 0) | |
595 | break; | |
194c011f | 596 | } |
194c011f SW |
597 | return err; |
598 | } | |
b3b94faa | 599 | |
194c011f | 600 | /** |
f2741d98 SW |
601 | * gfs2_create_inode - Create a new inode |
602 | * @dir: The parent directory | |
603 | * @dentry: The new dentry | |
6d4ade98 | 604 | * @file: If non-NULL, the file which is being opened |
f2741d98 SW |
605 | * @mode: The permissions on the new inode |
606 | * @dev: For device nodes, this is the device number | |
607 | * @symname: For symlinks, this is the link destination | |
608 | * @size: The initial size of the inode (ignored for directories) | |
c551f66c | 609 | * @excl: Force fail if inode exists |
194c011f | 610 | * |
38552ff6 AG |
611 | * FIXME: Change to allocate the disk blocks and write them out in the same |
612 | * transaction. That way, we can no longer end up in a situation in which an | |
613 | * inode is allocated, the node crashes, and the block looks like a valid | |
614 | * inode. (With atomic creates in place, we will also no longer need to zero | |
615 | * the link count and dirty the inode here on failure.) | |
616 | * | |
f2741d98 | 617 | * Returns: 0 on success, or error code |
194c011f SW |
618 | */ |
619 | ||
f2741d98 | 620 | static int gfs2_create_inode(struct inode *dir, struct dentry *dentry, |
6d4ade98 | 621 | struct file *file, |
175a4eb7 | 622 | umode_t mode, dev_t dev, const char *symname, |
b452a458 | 623 | unsigned int size, int excl) |
194c011f | 624 | { |
f2741d98 | 625 | const struct qstr *name = &dentry->d_name; |
e01580bf | 626 | struct posix_acl *default_acl, *acl; |
761fdbbc | 627 | struct gfs2_holder d_gh, gh; |
194c011f | 628 | struct inode *inode = NULL; |
8e2e0047 | 629 | struct gfs2_inode *dip = GFS2_I(dir), *ip; |
194c011f | 630 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); |
a55a47a3 | 631 | struct gfs2_glock *io_gl; |
38552ff6 | 632 | int error; |
9dbe9610 | 633 | u32 aflags = 0; |
b2c8b3ea | 634 | unsigned blocks = 1; |
19aeb5a6 | 635 | struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, }; |
194c011f SW |
636 | |
637 | if (!name->len || name->len > GFS2_FNAMESIZE) | |
f2741d98 | 638 | return -ENAMETOOLONG; |
194c011f | 639 | |
2fba46a0 | 640 | error = gfs2_qa_get(dip); |
0a305e49 BP |
641 | if (error) |
642 | return error; | |
643 | ||
fd4b4e04 SW |
644 | error = gfs2_rindex_update(sdp); |
645 | if (error) | |
2fba46a0 | 646 | goto fail; |
fd4b4e04 | 647 | |
761fdbbc | 648 | error = gfs2_glock_nq_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, &d_gh); |
194c011f SW |
649 | if (error) |
650 | goto fail; | |
761fdbbc | 651 | gfs2_holder_mark_uninitialized(&gh); |
194c011f SW |
652 | |
653 | error = create_ok(dip, name, mode); | |
5a00f3cc SW |
654 | if (error) |
655 | goto fail_gunlock; | |
656 | ||
657 | inode = gfs2_dir_search(dir, &dentry->d_name, !S_ISREG(mode) || excl); | |
658 | error = PTR_ERR(inode); | |
659 | if (!IS_ERR(inode)) { | |
571a4b57 AV |
660 | if (S_ISDIR(inode->i_mode)) { |
661 | iput(inode); | |
662 | inode = ERR_PTR(-EISDIR); | |
663 | goto fail_gunlock; | |
664 | } | |
44bb31ba | 665 | d_instantiate(dentry, inode); |
6d4ade98 | 666 | error = 0; |
0d0d1107 | 667 | if (file) { |
44bb31ba | 668 | if (S_ISREG(inode->i_mode)) |
be12af3e | 669 | error = finish_open(file, dentry, gfs2_open_common); |
44bb31ba AV |
670 | else |
671 | error = finish_no_open(file, NULL); | |
6d4ade98 | 672 | } |
761fdbbc | 673 | gfs2_glock_dq_uninit(&d_gh); |
2297ab61 | 674 | goto fail; |
5a00f3cc | 675 | } else if (error != -ENOENT) { |
194c011f | 676 | goto fail_gunlock; |
5a00f3cc | 677 | } |
194c011f | 678 | |
3c1c0ae1 | 679 | error = gfs2_diradd_alloc_required(dir, name, &da); |
fd4b4e04 SW |
680 | if (error < 0) |
681 | goto fail_gunlock; | |
682 | ||
c9aecf73 | 683 | inode = new_inode(sdp->sd_vfs); |
fd4b4e04 SW |
684 | error = -ENOMEM; |
685 | if (!inode) | |
686 | goto fail_gunlock; | |
3d0258bc | 687 | ip = GFS2_I(inode); |
fd4b4e04 | 688 | |
e01580bf CH |
689 | error = posix_acl_create(dir, &mode, &default_acl, &acl); |
690 | if (error) | |
783013c0 | 691 | goto fail_gunlock; |
e01580bf | 692 | |
2fba46a0 | 693 | error = gfs2_qa_get(ip); |
194c011f | 694 | if (error) |
e01580bf | 695 | goto fail_free_acls; |
c9aecf73 | 696 | |
c9aecf73 | 697 | inode->i_mode = mode; |
79ba7480 | 698 | set_nlink(inode, S_ISDIR(mode) ? 2 : 1); |
c9aecf73 SW |
699 | inode->i_rdev = dev; |
700 | inode->i_size = size; | |
580f721b | 701 | simple_inode_init_ts(inode); |
c9aecf73 | 702 | munge_mode_uid_gid(dip, inode); |
00a158be | 703 | check_and_update_goal(dip); |
c9aecf73 | 704 | ip->i_goal = dip->i_goal; |
28fb3027 SW |
705 | ip->i_diskflags = 0; |
706 | ip->i_eattr = 0; | |
707 | ip->i_height = 0; | |
708 | ip->i_depth = 0; | |
709 | ip->i_entries = 0; | |
cc963a11 | 710 | ip->i_no_addr = 0; /* Temporarily zero until real addr is assigned */ |
28fb3027 SW |
711 | |
712 | switch(mode & S_IFMT) { | |
713 | case S_IFREG: | |
714 | if ((dip->i_diskflags & GFS2_DIF_INHERIT_JDATA) || | |
715 | gfs2_tune_get(sdp, gt_new_files_jdata)) | |
716 | ip->i_diskflags |= GFS2_DIF_JDATA; | |
717 | gfs2_set_aops(inode); | |
718 | break; | |
719 | case S_IFDIR: | |
720 | ip->i_diskflags |= (dip->i_diskflags & GFS2_DIF_INHERIT_JDATA); | |
721 | ip->i_diskflags |= GFS2_DIF_JDATA; | |
722 | ip->i_entries = 2; | |
723 | break; | |
724 | } | |
acc546fd AD |
725 | |
726 | /* Force SYSTEM flag on all files and subdirs of a SYSTEM directory */ | |
727 | if (dip->i_diskflags & GFS2_DIF_SYSTEM) | |
728 | ip->i_diskflags |= GFS2_DIF_SYSTEM; | |
729 | ||
28fb3027 | 730 | gfs2_set_inode_flags(inode); |
194c011f | 731 | |
2b0143b5 | 732 | if ((GFS2_I(d_inode(sdp->sd_root_dir)) == dip) || |
9dbe9610 SW |
733 | (dip->i_diskflags & GFS2_DIF_TOPDIR)) |
734 | aflags |= GFS2_AF_ORLOV; | |
735 | ||
b2c8b3ea SW |
736 | if (default_acl || acl) |
737 | blocks++; | |
738 | ||
739 | error = alloc_dinode(ip, aflags, &blocks); | |
194c011f | 740 | if (error) |
c9aecf73 | 741 | goto fail_free_inode; |
194c011f | 742 | |
b2c8b3ea SW |
743 | gfs2_set_inode_blocks(inode, blocks); |
744 | ||
c9aecf73 | 745 | error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl); |
194c011f | 746 | if (error) |
c9aecf73 | 747 | goto fail_free_inode; |
98e5a91a | 748 | |
dd0ecf54 | 749 | error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_iopen_glops, CREATE, &io_gl); |
c9aecf73 SW |
750 | if (error) |
751 | goto fail_free_inode; | |
dd0ecf54 | 752 | gfs2_cancel_delete_work(io_gl); |
dd0ecf54 | 753 | |
4ec3c19d | 754 | retry: |
3d36e57f | 755 | error = insert_inode_locked4(inode, ip->i_no_addr, iget_test, &ip->i_no_addr); |
4ec3c19d AG |
756 | if (error == -EBUSY) |
757 | goto retry; | |
758 | if (error) | |
759 | goto fail_gunlock2; | |
3d36e57f | 760 | |
ebdc416c AG |
761 | error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT | GL_NOPID, |
762 | &ip->i_iopen_gh); | |
dd0ecf54 AG |
763 | if (error) |
764 | goto fail_gunlock2; | |
c9aecf73 | 765 | |
761fdbbc | 766 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, &gh); |
29464ee3 AG |
767 | if (error) |
768 | goto fail_gunlock3; | |
769 | ||
b2c8b3ea | 770 | error = gfs2_trans_begin(sdp, blocks, 0); |
c9aecf73 | 771 | if (error) |
29464ee3 | 772 | goto fail_gunlock3; |
194c011f | 773 | |
38552ff6 | 774 | if (blocks > 1) |
b2c8b3ea | 775 | gfs2_init_xattr(ip); |
79ba7480 | 776 | init_dinode(dip, ip, symname); |
fd4b4e04 SW |
777 | gfs2_trans_end(sdp); |
778 | ||
3d36e57f | 779 | glock_set_object(ip->i_gl, ip); |
8793e149 | 780 | glock_set_object(io_gl, ip); |
c9aecf73 | 781 | gfs2_set_iop(inode); |
c9aecf73 | 782 | |
e01580bf | 783 | if (default_acl) { |
1a39ba99 | 784 | error = __gfs2_set_acl(inode, default_acl, ACL_TYPE_DEFAULT); |
6ff9b09e | 785 | if (error) |
29464ee3 | 786 | goto fail_gunlock4; |
e01580bf | 787 | posix_acl_release(default_acl); |
6ff9b09e | 788 | default_acl = NULL; |
e01580bf CH |
789 | } |
790 | if (acl) { | |
6ff9b09e AG |
791 | error = __gfs2_set_acl(inode, acl, ACL_TYPE_ACCESS); |
792 | if (error) | |
29464ee3 | 793 | goto fail_gunlock4; |
e01580bf | 794 | posix_acl_release(acl); |
6ff9b09e | 795 | acl = NULL; |
e01580bf CH |
796 | } |
797 | ||
f45dc26d BP |
798 | error = security_inode_init_security(&ip->i_inode, &dip->i_inode, name, |
799 | &gfs2_initxattrs, NULL); | |
194c011f | 800 | if (error) |
29464ee3 | 801 | goto fail_gunlock4; |
194c011f | 802 | |
3c1c0ae1 | 803 | error = link_dinode(dip, name, ip, &da); |
194c011f | 804 | if (error) |
29464ee3 | 805 | goto fail_gunlock4; |
194c011f | 806 | |
79ba7480 | 807 | mark_inode_dirty(inode); |
6d4ade98 | 808 | d_instantiate(dentry, inode); |
2c47c1be BP |
809 | /* After instantiate, errors should result in evict which will destroy |
810 | * both inode and iopen glocks properly. */ | |
c5bf8fef | 811 | if (file) { |
73a09dd9 | 812 | file->f_mode |= FMODE_CREATED; |
be12af3e | 813 | error = finish_open(file, dentry, gfs2_open_common); |
c5bf8fef | 814 | } |
761fdbbc | 815 | gfs2_glock_dq_uninit(&d_gh); |
2297ab61 | 816 | gfs2_qa_put(ip); |
761fdbbc | 817 | gfs2_glock_dq_uninit(&gh); |
2c47c1be | 818 | gfs2_glock_put(io_gl); |
2297ab61 | 819 | gfs2_qa_put(dip); |
3d36e57f | 820 | unlock_new_inode(inode); |
6d4ade98 | 821 | return error; |
194c011f | 822 | |
29464ee3 | 823 | fail_gunlock4: |
3d36e57f | 824 | glock_clear_object(ip->i_gl, ip); |
9c1b2808 | 825 | glock_clear_object(io_gl, ip); |
29464ee3 | 826 | fail_gunlock3: |
783013c0 | 827 | gfs2_glock_dq_uninit(&ip->i_iopen_gh); |
194c011f | 828 | fail_gunlock2: |
2c47c1be | 829 | gfs2_glock_put(io_gl); |
c9aecf73 | 830 | fail_free_inode: |
9ffa1888 AG |
831 | if (ip->i_gl) { |
832 | gfs2_glock_put(ip->i_gl); | |
833 | ip->i_gl = NULL; | |
834 | } | |
7336905a | 835 | gfs2_rs_deltree(&ip->i_res); |
1595548f | 836 | gfs2_qa_put(ip); |
e01580bf | 837 | fail_free_acls: |
6ff9b09e AG |
838 | posix_acl_release(default_acl); |
839 | posix_acl_release(acl); | |
194c011f | 840 | fail_gunlock: |
2b47dad8 | 841 | gfs2_dir_no_add(&da); |
761fdbbc | 842 | gfs2_glock_dq_uninit(&d_gh); |
15a798f7 | 843 | if (!IS_ERR_OR_NULL(inode)) { |
38552ff6 | 844 | set_bit(GIF_ALLOC_FAILED, &ip->i_flags); |
79ba7480 | 845 | clear_nlink(inode); |
38552ff6 | 846 | if (ip->i_no_addr) |
05978803 | 847 | mark_inode_dirty(inode); |
3d36e57f AG |
848 | if (inode->i_state & I_NEW) |
849 | iget_failed(inode); | |
850 | else | |
851 | iput(inode); | |
40ac218f | 852 | } |
761fdbbc AG |
853 | if (gfs2_holder_initialized(&gh)) |
854 | gfs2_glock_dq_uninit(&gh); | |
194c011f | 855 | fail: |
2fba46a0 | 856 | gfs2_qa_put(dip); |
f2741d98 | 857 | return error; |
194c011f | 858 | } |
f2741d98 | 859 | |
b3b94faa DT |
860 | /** |
861 | * gfs2_create - Create a file | |
6c960e68 | 862 | * @idmap: idmap of the mount the inode was found from |
b3b94faa DT |
863 | * @dir: The directory in which to create the file |
864 | * @dentry: The dentry of the new file | |
865 | * @mode: The mode of the new file | |
c551f66c | 866 | * @excl: Force fail if inode exists |
b3b94faa DT |
867 | * |
868 | * Returns: errno | |
869 | */ | |
870 | ||
6c960e68 | 871 | static int gfs2_create(struct mnt_idmap *idmap, struct inode *dir, |
549c7297 | 872 | struct dentry *dentry, umode_t mode, bool excl) |
b3b94faa | 873 | { |
b452a458 | 874 | return gfs2_create_inode(dir, dentry, NULL, S_IFREG | mode, 0, NULL, 0, excl); |
b3b94faa DT |
875 | } |
876 | ||
877 | /** | |
6d4ade98 | 878 | * __gfs2_lookup - Look up a filename in a directory and return its inode |
b3b94faa DT |
879 | * @dir: The directory inode |
880 | * @dentry: The dentry of the new inode | |
6d4ade98 | 881 | * @file: File to be opened |
b3b94faa | 882 | * |
b3b94faa DT |
883 | * |
884 | * Returns: errno | |
885 | */ | |
886 | ||
6d4ade98 | 887 | static struct dentry *__gfs2_lookup(struct inode *dir, struct dentry *dentry, |
b452a458 | 888 | struct file *file) |
b3b94faa | 889 | { |
6d4ade98 SW |
890 | struct inode *inode; |
891 | struct dentry *d; | |
892 | struct gfs2_holder gh; | |
893 | struct gfs2_glock *gl; | |
894 | int error; | |
895 | ||
896 | inode = gfs2_lookupi(dir, &dentry->d_name, 0); | |
7b7a9115 BC |
897 | if (inode == NULL) { |
898 | d_add(dentry, NULL); | |
6d4ade98 | 899 | return NULL; |
7b7a9115 | 900 | } |
6d4ade98 SW |
901 | if (IS_ERR(inode)) |
902 | return ERR_CAST(inode); | |
903 | ||
904 | gl = GFS2_I(inode)->i_gl; | |
905 | error = gfs2_glock_nq_init(gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); | |
906 | if (error) { | |
907 | iput(inode); | |
908 | return ERR_PTR(error); | |
9656b2c1 | 909 | } |
6d4ade98 SW |
910 | |
911 | d = d_splice_alias(inode, dentry); | |
d57b9c9a | 912 | if (IS_ERR(d)) { |
d57b9c9a BF |
913 | gfs2_glock_dq_uninit(&gh); |
914 | return d; | |
915 | } | |
6d4ade98 | 916 | if (file && S_ISREG(inode->i_mode)) |
be12af3e | 917 | error = finish_open(file, dentry, gfs2_open_common); |
6d4ade98 SW |
918 | |
919 | gfs2_glock_dq_uninit(&gh); | |
5ca1db41 MS |
920 | if (error) { |
921 | dput(d); | |
6d4ade98 | 922 | return ERR_PTR(error); |
5ca1db41 | 923 | } |
6d4ade98 SW |
924 | return d; |
925 | } | |
926 | ||
927 | static struct dentry *gfs2_lookup(struct inode *dir, struct dentry *dentry, | |
928 | unsigned flags) | |
929 | { | |
b452a458 | 930 | return __gfs2_lookup(dir, dentry, NULL); |
b3b94faa DT |
931 | } |
932 | ||
933 | /** | |
934 | * gfs2_link - Link to a file | |
935 | * @old_dentry: The inode to link | |
936 | * @dir: Add link to this directory | |
937 | * @dentry: The name of the link | |
938 | * | |
939 | * Link the inode in "old_dentry" into the directory "dir" with the | |
940 | * name in "dentry". | |
941 | * | |
942 | * Returns: errno | |
943 | */ | |
944 | ||
945 | static int gfs2_link(struct dentry *old_dentry, struct inode *dir, | |
946 | struct dentry *dentry) | |
947 | { | |
feaa7bba SW |
948 | struct gfs2_inode *dip = GFS2_I(dir); |
949 | struct gfs2_sbd *sdp = GFS2_SB(dir); | |
2b0143b5 | 950 | struct inode *inode = d_inode(old_dentry); |
feaa7bba | 951 | struct gfs2_inode *ip = GFS2_I(inode); |
2d084780 | 952 | struct gfs2_holder d_gh, gh; |
2baee03f | 953 | struct buffer_head *dibh; |
19aeb5a6 | 954 | struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, }; |
b3b94faa DT |
955 | int error; |
956 | ||
b60623c2 | 957 | if (S_ISDIR(inode->i_mode)) |
b3b94faa DT |
958 | return -EPERM; |
959 | ||
2fba46a0 | 960 | error = gfs2_qa_get(dip); |
0a305e49 BP |
961 | if (error) |
962 | return error; | |
963 | ||
2d084780 AP |
964 | gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, &d_gh); |
965 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); | |
b3b94faa | 966 | |
2d084780 | 967 | error = gfs2_glock_nq(&d_gh); |
72dbf479 BP |
968 | if (error) |
969 | goto out_parent; | |
970 | ||
2d084780 | 971 | error = gfs2_glock_nq(&gh); |
b3b94faa | 972 | if (error) |
72dbf479 | 973 | goto out_child; |
b3b94faa | 974 | |
d192a8e5 SW |
975 | error = -ENOENT; |
976 | if (inode->i_nlink == 0) | |
977 | goto out_gunlock; | |
978 | ||
4609e1f1 | 979 | error = gfs2_permission(&nop_mnt_idmap, dir, MAY_WRITE | MAY_EXEC); |
b3b94faa DT |
980 | if (error) |
981 | goto out_gunlock; | |
982 | ||
dbb7cae2 | 983 | error = gfs2_dir_check(dir, &dentry->d_name, NULL); |
b3b94faa DT |
984 | switch (error) { |
985 | case -ENOENT: | |
986 | break; | |
987 | case 0: | |
988 | error = -EEXIST; | |
e5966cf2 | 989 | goto out_gunlock; |
b3b94faa DT |
990 | default: |
991 | goto out_gunlock; | |
992 | } | |
993 | ||
994 | error = -EINVAL; | |
4f56110a | 995 | if (!dip->i_inode.i_nlink) |
b3b94faa DT |
996 | goto out_gunlock; |
997 | error = -EFBIG; | |
ad6203f2 | 998 | if (dip->i_entries == (u32)-1) |
b3b94faa DT |
999 | goto out_gunlock; |
1000 | error = -EPERM; | |
1001 | if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) | |
1002 | goto out_gunlock; | |
b3b94faa | 1003 | error = -EMLINK; |
4f56110a | 1004 | if (ip->i_inode.i_nlink == (u32)-1) |
b3b94faa DT |
1005 | goto out_gunlock; |
1006 | ||
3c1c0ae1 | 1007 | error = gfs2_diradd_alloc_required(dir, &dentry->d_name, &da); |
c752666c | 1008 | if (error < 0) |
b3b94faa DT |
1009 | goto out_gunlock; |
1010 | ||
3c1c0ae1 SW |
1011 | if (da.nr_blocks) { |
1012 | struct gfs2_alloc_parms ap = { .target = da.nr_blocks, }; | |
b8fbf471 | 1013 | error = gfs2_quota_lock_check(dip, &ap); |
b3b94faa | 1014 | if (error) |
5407e242 | 1015 | goto out_gunlock; |
b3b94faa | 1016 | |
7b9cff46 | 1017 | error = gfs2_inplace_reserve(dip, &ap); |
b3b94faa DT |
1018 | if (error) |
1019 | goto out_gunlock_q; | |
1020 | ||
534cf9ca | 1021 | error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, &da, 2), 0); |
b3b94faa DT |
1022 | if (error) |
1023 | goto out_ipres; | |
1024 | } else { | |
1025 | error = gfs2_trans_begin(sdp, 2 * RES_DINODE + RES_LEAF, 0); | |
1026 | if (error) | |
1027 | goto out_ipres; | |
1028 | } | |
1029 | ||
2baee03f | 1030 | error = gfs2_meta_inode_buffer(ip, &dibh); |
b3b94faa DT |
1031 | if (error) |
1032 | goto out_end_trans; | |
1033 | ||
2b47dad8 | 1034 | error = gfs2_dir_add(dir, &dentry->d_name, ip, &da); |
2baee03f SW |
1035 | if (error) |
1036 | goto out_brelse; | |
1037 | ||
350a9b0a | 1038 | gfs2_trans_add_meta(ip->i_gl, dibh); |
2baee03f | 1039 | inc_nlink(&ip->i_inode); |
8a8b8d91 | 1040 | inode_set_ctime_current(&ip->i_inode); |
ab9bbda0 SW |
1041 | ihold(inode); |
1042 | d_instantiate(dentry, inode); | |
1043 | mark_inode_dirty(inode); | |
b3b94faa | 1044 | |
2baee03f SW |
1045 | out_brelse: |
1046 | brelse(dibh); | |
feaa7bba | 1047 | out_end_trans: |
b3b94faa | 1048 | gfs2_trans_end(sdp); |
feaa7bba | 1049 | out_ipres: |
3c1c0ae1 | 1050 | if (da.nr_blocks) |
b3b94faa | 1051 | gfs2_inplace_release(dip); |
feaa7bba | 1052 | out_gunlock_q: |
3c1c0ae1 | 1053 | if (da.nr_blocks) |
b3b94faa | 1054 | gfs2_quota_unlock(dip); |
feaa7bba | 1055 | out_gunlock: |
2b47dad8 | 1056 | gfs2_dir_no_add(&da); |
2d084780 | 1057 | gfs2_glock_dq(&gh); |
72dbf479 | 1058 | out_child: |
2d084780 | 1059 | gfs2_glock_dq(&d_gh); |
72dbf479 | 1060 | out_parent: |
2297ab61 | 1061 | gfs2_qa_put(dip); |
2d084780 AP |
1062 | gfs2_holder_uninit(&d_gh); |
1063 | gfs2_holder_uninit(&gh); | |
b3b94faa DT |
1064 | return error; |
1065 | } | |
1066 | ||
87ec2174 SW |
1067 | /* |
1068 | * gfs2_unlink_ok - check to see that a inode is still in a directory | |
1069 | * @dip: the directory | |
1070 | * @name: the name of the file | |
1071 | * @ip: the inode | |
1072 | * | |
1073 | * Assumes that the lock on (at least) @dip is held. | |
1074 | * | |
1075 | * Returns: 0 if the parent/child relationship is correct, errno if it isn't | |
1076 | */ | |
1077 | ||
1078 | static int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name, | |
1079 | const struct gfs2_inode *ip) | |
1080 | { | |
1081 | int error; | |
1082 | ||
1083 | if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode)) | |
1084 | return -EPERM; | |
1085 | ||
1086 | if ((dip->i_inode.i_mode & S_ISVTX) && | |
6b24c0d2 EB |
1087 | !uid_eq(dip->i_inode.i_uid, current_fsuid()) && |
1088 | !uid_eq(ip->i_inode.i_uid, current_fsuid()) && !capable(CAP_FOWNER)) | |
87ec2174 SW |
1089 | return -EPERM; |
1090 | ||
1091 | if (IS_APPEND(&dip->i_inode)) | |
1092 | return -EPERM; | |
1093 | ||
4609e1f1 | 1094 | error = gfs2_permission(&nop_mnt_idmap, &dip->i_inode, |
549c7297 | 1095 | MAY_WRITE | MAY_EXEC); |
87ec2174 SW |
1096 | if (error) |
1097 | return error; | |
1098 | ||
37975f15 | 1099 | return gfs2_dir_check(&dip->i_inode, name, ip); |
87ec2174 SW |
1100 | } |
1101 | ||
b3b94faa | 1102 | /** |
855d23ce SW |
1103 | * gfs2_unlink_inode - Removes an inode from its parent dir and unlinks it |
1104 | * @dip: The parent directory | |
c551f66c | 1105 | * @dentry: The dentry to unlink |
855d23ce SW |
1106 | * |
1107 | * Called with all the locks and in a transaction. This will only be | |
1108 | * called for a directory after it has been checked to ensure it is empty. | |
1109 | * | |
1110 | * Returns: 0 on success, or an error | |
1111 | */ | |
1112 | ||
1113 | static int gfs2_unlink_inode(struct gfs2_inode *dip, | |
4327a9bf | 1114 | const struct dentry *dentry) |
855d23ce | 1115 | { |
2b0143b5 | 1116 | struct inode *inode = d_inode(dentry); |
855d23ce SW |
1117 | struct gfs2_inode *ip = GFS2_I(inode); |
1118 | int error; | |
1119 | ||
1120 | error = gfs2_dir_del(dip, dentry); | |
1121 | if (error) | |
1122 | return error; | |
1123 | ||
1124 | ip->i_entries = 0; | |
8a8b8d91 | 1125 | inode_set_ctime_current(inode); |
855d23ce SW |
1126 | if (S_ISDIR(inode->i_mode)) |
1127 | clear_nlink(inode); | |
1128 | else | |
1129 | drop_nlink(inode); | |
855d23ce SW |
1130 | mark_inode_dirty(inode); |
1131 | if (inode->i_nlink == 0) | |
1132 | gfs2_unlink_di(inode); | |
1133 | return 0; | |
1134 | } | |
1135 | ||
1136 | ||
1137 | /** | |
1138 | * gfs2_unlink - Unlink an inode (this does rmdir as well) | |
1139 | * @dir: The inode of the directory containing the inode to unlink | |
b3b94faa DT |
1140 | * @dentry: The file itself |
1141 | * | |
855d23ce SW |
1142 | * This routine uses the type of the inode as a flag to figure out |
1143 | * whether this is an unlink or an rmdir. | |
b3b94faa DT |
1144 | * |
1145 | * Returns: errno | |
1146 | */ | |
1147 | ||
1148 | static int gfs2_unlink(struct inode *dir, struct dentry *dentry) | |
1149 | { | |
feaa7bba SW |
1150 | struct gfs2_inode *dip = GFS2_I(dir); |
1151 | struct gfs2_sbd *sdp = GFS2_SB(dir); | |
2b0143b5 | 1152 | struct inode *inode = d_inode(dentry); |
855d23ce | 1153 | struct gfs2_inode *ip = GFS2_I(inode); |
14a58517 | 1154 | struct gfs2_holder d_gh, r_gh, gh; |
ddee7608 | 1155 | struct gfs2_rgrpd *rgd; |
5e2f7d61 BP |
1156 | int error; |
1157 | ||
1158 | error = gfs2_rindex_update(sdp); | |
1159 | if (error) | |
1160 | return error; | |
1161 | ||
1162 | error = -EROFS; | |
b3b94faa | 1163 | |
14a58517 AP |
1164 | gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, &d_gh); |
1165 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); | |
b3b94faa | 1166 | |
66fc061b | 1167 | rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr, 1); |
a365fbf3 | 1168 | if (!rgd) |
87654896 | 1169 | goto out_inodes; |
a365fbf3 | 1170 | |
14a58517 | 1171 | gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, LM_FLAG_NODE_SCOPE, &r_gh); |
ddee7608 RC |
1172 | |
1173 | ||
14a58517 | 1174 | error = gfs2_glock_nq(&d_gh); |
b3b94faa | 1175 | if (error) |
8497a46e SW |
1176 | goto out_parent; |
1177 | ||
14a58517 | 1178 | error = gfs2_glock_nq(&gh); |
8497a46e SW |
1179 | if (error) |
1180 | goto out_child; | |
1181 | ||
d192a8e5 | 1182 | error = -ENOENT; |
855d23ce | 1183 | if (inode->i_nlink == 0) |
d192a8e5 SW |
1184 | goto out_rgrp; |
1185 | ||
855d23ce SW |
1186 | if (S_ISDIR(inode->i_mode)) { |
1187 | error = -ENOTEMPTY; | |
1188 | if (ip->i_entries > 2 || inode->i_nlink > 2) | |
1189 | goto out_rgrp; | |
1190 | } | |
1191 | ||
14a58517 | 1192 | error = gfs2_glock_nq(&r_gh); /* rgrp */ |
8497a46e SW |
1193 | if (error) |
1194 | goto out_rgrp; | |
b3b94faa DT |
1195 | |
1196 | error = gfs2_unlink_ok(dip, &dentry->d_name, ip); | |
1197 | if (error) | |
72dbf479 | 1198 | goto out_gunlock; |
b3b94faa | 1199 | |
855d23ce | 1200 | error = gfs2_trans_begin(sdp, 2*RES_DINODE + 3*RES_LEAF + RES_RG_BIT, 0); |
855d23ce | 1201 | if (error) |
2eb5909d | 1202 | goto out_gunlock; |
b3b94faa | 1203 | |
4327a9bf | 1204 | error = gfs2_unlink_inode(dip, dentry); |
feaa7bba | 1205 | gfs2_trans_end(sdp); |
2eb5909d | 1206 | |
72dbf479 | 1207 | out_gunlock: |
14a58517 | 1208 | gfs2_glock_dq(&r_gh); |
8497a46e | 1209 | out_rgrp: |
14a58517 | 1210 | gfs2_glock_dq(&gh); |
8497a46e | 1211 | out_child: |
14a58517 | 1212 | gfs2_glock_dq(&d_gh); |
8497a46e | 1213 | out_parent: |
14a58517 | 1214 | gfs2_holder_uninit(&r_gh); |
87654896 | 1215 | out_inodes: |
14a58517 AP |
1216 | gfs2_holder_uninit(&gh); |
1217 | gfs2_holder_uninit(&d_gh); | |
b3b94faa DT |
1218 | return error; |
1219 | } | |
1220 | ||
1221 | /** | |
1222 | * gfs2_symlink - Create a symlink | |
7a77db95 | 1223 | * @idmap: idmap of the mount the inode was found from |
b3b94faa DT |
1224 | * @dir: The directory to create the symlink in |
1225 | * @dentry: The dentry to put the symlink in | |
1226 | * @symname: The thing which the link points to | |
1227 | * | |
1228 | * Returns: errno | |
1229 | */ | |
1230 | ||
7a77db95 | 1231 | static int gfs2_symlink(struct mnt_idmap *idmap, struct inode *dir, |
549c7297 | 1232 | struct dentry *dentry, const char *symname) |
b3b94faa | 1233 | { |
160b4026 | 1234 | unsigned int size; |
b3b94faa | 1235 | |
b3b94faa | 1236 | size = strlen(symname); |
235628c5 | 1237 | if (size >= gfs2_max_stuffed_size(GFS2_I(dir))) |
b3b94faa DT |
1238 | return -ENAMETOOLONG; |
1239 | ||
b452a458 | 1240 | return gfs2_create_inode(dir, dentry, NULL, S_IFLNK | S_IRWXUGO, 0, symname, size, 0); |
b3b94faa DT |
1241 | } |
1242 | ||
1243 | /** | |
1244 | * gfs2_mkdir - Make a directory | |
c54bd91e | 1245 | * @idmap: idmap of the mount the inode was found from |
b3b94faa DT |
1246 | * @dir: The parent directory of the new one |
1247 | * @dentry: The dentry of the new directory | |
1248 | * @mode: The mode of the new directory | |
1249 | * | |
1250 | * Returns: errno | |
1251 | */ | |
1252 | ||
c54bd91e | 1253 | static int gfs2_mkdir(struct mnt_idmap *idmap, struct inode *dir, |
549c7297 | 1254 | struct dentry *dentry, umode_t mode) |
b3b94faa | 1255 | { |
235628c5 | 1256 | unsigned dsize = gfs2_max_stuffed_size(GFS2_I(dir)); |
b452a458 | 1257 | return gfs2_create_inode(dir, dentry, NULL, S_IFDIR | mode, 0, NULL, dsize, 0); |
b3b94faa DT |
1258 | } |
1259 | ||
b3b94faa DT |
1260 | /** |
1261 | * gfs2_mknod - Make a special file | |
5ebb29be | 1262 | * @idmap: idmap of the mount the inode was found from |
b3b94faa DT |
1263 | * @dir: The directory in which the special file will reside |
1264 | * @dentry: The dentry of the special file | |
1265 | * @mode: The mode of the special file | |
f2741d98 | 1266 | * @dev: The device specification of the special file |
b3b94faa DT |
1267 | * |
1268 | */ | |
1269 | ||
5ebb29be | 1270 | static int gfs2_mknod(struct mnt_idmap *idmap, struct inode *dir, |
549c7297 | 1271 | struct dentry *dentry, umode_t mode, dev_t dev) |
b3b94faa | 1272 | { |
b452a458 | 1273 | return gfs2_create_inode(dir, dentry, NULL, mode, dev, NULL, 0, 0); |
6d4ade98 SW |
1274 | } |
1275 | ||
1276 | /** | |
1277 | * gfs2_atomic_open - Atomically open a file | |
1278 | * @dir: The directory | |
1279 | * @dentry: The proposed new entry | |
1280 | * @file: The proposed new struct file | |
1281 | * @flags: open flags | |
1282 | * @mode: File mode | |
6d4ade98 SW |
1283 | * |
1284 | * Returns: error code or 0 for success | |
1285 | */ | |
1286 | ||
1287 | static int gfs2_atomic_open(struct inode *dir, struct dentry *dentry, | |
86fbca49 | 1288 | struct file *file, unsigned flags, |
44907d79 | 1289 | umode_t mode) |
6d4ade98 SW |
1290 | { |
1291 | struct dentry *d; | |
1292 | bool excl = !!(flags & O_EXCL); | |
1293 | ||
00699ad8 | 1294 | if (!d_in_lookup(dentry)) |
4d93bc3e AV |
1295 | goto skip_lookup; |
1296 | ||
b452a458 | 1297 | d = __gfs2_lookup(dir, dentry, file); |
6d4ade98 SW |
1298 | if (IS_ERR(d)) |
1299 | return PTR_ERR(d); | |
5ca1db41 MS |
1300 | if (d != NULL) |
1301 | dentry = d; | |
2b0143b5 | 1302 | if (d_really_is_positive(dentry)) { |
aad888f8 | 1303 | if (!(file->f_mode & FMODE_OPENED)) |
ec7d879c | 1304 | return finish_no_open(file, d); |
5ca1db41 | 1305 | dput(d); |
21039132 | 1306 | return excl && (flags & O_CREAT) ? -EEXIST : 0; |
6d4ade98 SW |
1307 | } |
1308 | ||
5ca1db41 | 1309 | BUG_ON(d != NULL); |
4d93bc3e AV |
1310 | |
1311 | skip_lookup: | |
6d4ade98 SW |
1312 | if (!(flags & O_CREAT)) |
1313 | return -ENOENT; | |
1314 | ||
b452a458 | 1315 | return gfs2_create_inode(dir, dentry, file, S_IFREG | mode, 0, NULL, 0, excl); |
b3b94faa DT |
1316 | } |
1317 | ||
0188d6c5 SW |
1318 | /* |
1319 | * gfs2_ok_to_move - check if it's ok to move a directory to another directory | |
1320 | * @this: move this | |
1321 | * @to: to here | |
1322 | * | |
1323 | * Follow @to back to the root and make sure we don't encounter @this | |
1324 | * Assumes we already hold the rename lock. | |
1325 | * | |
1326 | * Returns: errno | |
1327 | */ | |
1328 | ||
1329 | static int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to) | |
1330 | { | |
1331 | struct inode *dir = &to->i_inode; | |
1332 | struct super_block *sb = dir->i_sb; | |
1333 | struct inode *tmp; | |
0188d6c5 SW |
1334 | int error = 0; |
1335 | ||
0188d6c5 SW |
1336 | igrab(dir); |
1337 | ||
1338 | for (;;) { | |
1339 | if (dir == &this->i_inode) { | |
1340 | error = -EINVAL; | |
1341 | break; | |
1342 | } | |
2b0143b5 | 1343 | if (dir == d_inode(sb->s_root)) { |
0188d6c5 SW |
1344 | error = 0; |
1345 | break; | |
1346 | } | |
1347 | ||
8d123585 | 1348 | tmp = gfs2_lookupi(dir, &gfs2_qdotdot, 1); |
48f8f711 AD |
1349 | if (!tmp) { |
1350 | error = -ENOENT; | |
1351 | break; | |
1352 | } | |
0188d6c5 SW |
1353 | if (IS_ERR(tmp)) { |
1354 | error = PTR_ERR(tmp); | |
1355 | break; | |
1356 | } | |
1357 | ||
1358 | iput(dir); | |
1359 | dir = tmp; | |
1360 | } | |
1361 | ||
1362 | iput(dir); | |
1363 | ||
1364 | return error; | |
1365 | } | |
1366 | ||
a63b7bbc BM |
1367 | /** |
1368 | * update_moved_ino - Update an inode that's being moved | |
1369 | * @ip: The inode being moved | |
1370 | * @ndip: The parent directory of the new filename | |
1371 | * @dir_rename: True of ip is a directory | |
1372 | * | |
1373 | * Returns: errno | |
1374 | */ | |
1375 | ||
1376 | static int update_moved_ino(struct gfs2_inode *ip, struct gfs2_inode *ndip, | |
1377 | int dir_rename) | |
1378 | { | |
a63b7bbc BM |
1379 | if (dir_rename) |
1380 | return gfs2_dir_mvino(ip, &gfs2_qdotdot, ndip, DT_DIR); | |
1381 | ||
8a8b8d91 | 1382 | inode_set_ctime_current(&ip->i_inode); |
83998ccd | 1383 | mark_inode_dirty_sync(&ip->i_inode); |
a63b7bbc BM |
1384 | return 0; |
1385 | } | |
1386 | ||
1387 | ||
b3b94faa DT |
1388 | /** |
1389 | * gfs2_rename - Rename a file | |
1390 | * @odir: Parent directory of old file name | |
1391 | * @odentry: The old dentry of the file | |
1392 | * @ndir: Parent directory of new file name | |
1393 | * @ndentry: The new dentry of the file | |
1394 | * | |
1395 | * Returns: errno | |
1396 | */ | |
1397 | ||
1398 | static int gfs2_rename(struct inode *odir, struct dentry *odentry, | |
1399 | struct inode *ndir, struct dentry *ndentry) | |
1400 | { | |
feaa7bba SW |
1401 | struct gfs2_inode *odip = GFS2_I(odir); |
1402 | struct gfs2_inode *ndip = GFS2_I(ndir); | |
2b0143b5 | 1403 | struct gfs2_inode *ip = GFS2_I(d_inode(odentry)); |
b3b94faa | 1404 | struct gfs2_inode *nip = NULL; |
feaa7bba | 1405 | struct gfs2_sbd *sdp = GFS2_SB(odir); |
bc74aaef | 1406 | struct gfs2_holder ghs[4], r_gh, rd_gh; |
ddee7608 | 1407 | struct gfs2_rgrpd *nrgd; |
b3b94faa DT |
1408 | unsigned int num_gh; |
1409 | int dir_rename = 0; | |
19aeb5a6 | 1410 | struct gfs2_diradd da = { .nr_blocks = 0, .save_loc = 0, }; |
b3b94faa DT |
1411 | unsigned int x; |
1412 | int error; | |
1413 | ||
6df9f9a2 | 1414 | gfs2_holder_mark_uninitialized(&r_gh); |
bc74aaef | 1415 | gfs2_holder_mark_uninitialized(&rd_gh); |
2b0143b5 DH |
1416 | if (d_really_is_positive(ndentry)) { |
1417 | nip = GFS2_I(d_inode(ndentry)); | |
b3b94faa DT |
1418 | if (ip == nip) |
1419 | return 0; | |
1420 | } | |
1421 | ||
5e2f7d61 BP |
1422 | error = gfs2_rindex_update(sdp); |
1423 | if (error) | |
1424 | return error; | |
1425 | ||
2fba46a0 | 1426 | error = gfs2_qa_get(ndip); |
0a305e49 BP |
1427 | if (error) |
1428 | return error; | |
1429 | ||
0188d6c5 SW |
1430 | if (odip != ndip) { |
1431 | error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE, | |
1432 | 0, &r_gh); | |
b3b94faa DT |
1433 | if (error) |
1434 | goto out; | |
1435 | ||
0188d6c5 SW |
1436 | if (S_ISDIR(ip->i_inode.i_mode)) { |
1437 | dir_rename = 1; | |
a63b7bbc | 1438 | /* don't move a directory into its subdir */ |
0188d6c5 SW |
1439 | error = gfs2_ok_to_move(ip, ndip); |
1440 | if (error) | |
1441 | goto out_gunlock_r; | |
1442 | } | |
b3b94faa DT |
1443 | } |
1444 | ||
d9d1ca30 | 1445 | num_gh = 1; |
ad26967b | 1446 | gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs); |
d9d1ca30 | 1447 | if (odip != ndip) { |
ad26967b BP |
1448 | gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE,GL_ASYNC, |
1449 | ghs + num_gh); | |
d9d1ca30 SW |
1450 | num_gh++; |
1451 | } | |
ad26967b | 1452 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs + num_gh); |
d9d1ca30 | 1453 | num_gh++; |
b3b94faa | 1454 | |
d9d1ca30 | 1455 | if (nip) { |
ad26967b BP |
1456 | gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, |
1457 | ghs + num_gh); | |
d9d1ca30 SW |
1458 | num_gh++; |
1459 | } | |
b3b94faa | 1460 | |
72dbf479 BP |
1461 | for (x = 0; x < num_gh; x++) { |
1462 | error = gfs2_glock_nq(ghs + x); | |
1463 | if (error) | |
1464 | goto out_gunlock; | |
1465 | } | |
ad26967b BP |
1466 | error = gfs2_glock_async_wait(num_gh, ghs); |
1467 | if (error) | |
1468 | goto out_gunlock; | |
b3b94faa | 1469 | |
bc74aaef BP |
1470 | if (nip) { |
1471 | /* Grab the resource group glock for unlink flag twiddling. | |
1472 | * This is the case where the target dinode already exists | |
1473 | * so we unlink before doing the rename. | |
1474 | */ | |
1475 | nrgd = gfs2_blk2rgrpd(sdp, nip->i_no_addr, 1); | |
1476 | if (!nrgd) { | |
1477 | error = -ENOENT; | |
1478 | goto out_gunlock; | |
1479 | } | |
4fc7ec31 BP |
1480 | error = gfs2_glock_nq_init(nrgd->rd_gl, LM_ST_EXCLUSIVE, |
1481 | LM_FLAG_NODE_SCOPE, &rd_gh); | |
bc74aaef BP |
1482 | if (error) |
1483 | goto out_gunlock; | |
1484 | } | |
1485 | ||
d192a8e5 SW |
1486 | error = -ENOENT; |
1487 | if (ip->i_inode.i_nlink == 0) | |
1488 | goto out_gunlock; | |
1489 | ||
b3b94faa DT |
1490 | /* Check out the old directory */ |
1491 | ||
1492 | error = gfs2_unlink_ok(odip, &odentry->d_name, ip); | |
1493 | if (error) | |
1494 | goto out_gunlock; | |
1495 | ||
1496 | /* Check out the new directory */ | |
1497 | ||
1498 | if (nip) { | |
1499 | error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip); | |
1500 | if (error) | |
1501 | goto out_gunlock; | |
1502 | ||
d192a8e5 SW |
1503 | if (nip->i_inode.i_nlink == 0) { |
1504 | error = -EAGAIN; | |
1505 | goto out_gunlock; | |
1506 | } | |
1507 | ||
b60623c2 | 1508 | if (S_ISDIR(nip->i_inode.i_mode)) { |
ad6203f2 | 1509 | if (nip->i_entries < 2) { |
94fb763b | 1510 | gfs2_consist_inode(nip); |
b3b94faa DT |
1511 | error = -EIO; |
1512 | goto out_gunlock; | |
1513 | } | |
ad6203f2 | 1514 | if (nip->i_entries > 2) { |
b3b94faa DT |
1515 | error = -ENOTEMPTY; |
1516 | goto out_gunlock; | |
1517 | } | |
1518 | } | |
1519 | } else { | |
4609e1f1 | 1520 | error = gfs2_permission(&nop_mnt_idmap, ndir, |
549c7297 | 1521 | MAY_WRITE | MAY_EXEC); |
b3b94faa DT |
1522 | if (error) |
1523 | goto out_gunlock; | |
1524 | ||
dbb7cae2 | 1525 | error = gfs2_dir_check(ndir, &ndentry->d_name, NULL); |
b3b94faa DT |
1526 | switch (error) { |
1527 | case -ENOENT: | |
1528 | error = 0; | |
1529 | break; | |
1530 | case 0: | |
1531 | error = -EEXIST; | |
e5966cf2 | 1532 | goto out_gunlock; |
b3b94faa DT |
1533 | default: |
1534 | goto out_gunlock; | |
098b9c14 | 1535 | } |
b3b94faa DT |
1536 | |
1537 | if (odip != ndip) { | |
4f56110a | 1538 | if (!ndip->i_inode.i_nlink) { |
d192a8e5 | 1539 | error = -ENOENT; |
b3b94faa DT |
1540 | goto out_gunlock; |
1541 | } | |
ad6203f2 | 1542 | if (ndip->i_entries == (u32)-1) { |
b3b94faa DT |
1543 | error = -EFBIG; |
1544 | goto out_gunlock; | |
1545 | } | |
b60623c2 | 1546 | if (S_ISDIR(ip->i_inode.i_mode) && |
4f56110a | 1547 | ndip->i_inode.i_nlink == (u32)-1) { |
b3b94faa DT |
1548 | error = -EMLINK; |
1549 | goto out_gunlock; | |
1550 | } | |
1551 | } | |
1552 | } | |
1553 | ||
1554 | /* Check out the dir to be renamed */ | |
1555 | ||
1556 | if (dir_rename) { | |
4609e1f1 | 1557 | error = gfs2_permission(&nop_mnt_idmap, d_inode(odentry), |
549c7297 | 1558 | MAY_WRITE); |
b3b94faa DT |
1559 | if (error) |
1560 | goto out_gunlock; | |
1561 | } | |
1562 | ||
3c1c0ae1 SW |
1563 | if (nip == NULL) { |
1564 | error = gfs2_diradd_alloc_required(ndir, &ndentry->d_name, &da); | |
1565 | if (error) | |
1566 | goto out_gunlock; | |
1567 | } | |
b3b94faa | 1568 | |
3c1c0ae1 SW |
1569 | if (da.nr_blocks) { |
1570 | struct gfs2_alloc_parms ap = { .target = da.nr_blocks, }; | |
b8fbf471 | 1571 | error = gfs2_quota_lock_check(ndip, &ap); |
b3b94faa | 1572 | if (error) |
5407e242 | 1573 | goto out_gunlock; |
b3b94faa | 1574 | |
7b9cff46 | 1575 | error = gfs2_inplace_reserve(ndip, &ap); |
b3b94faa DT |
1576 | if (error) |
1577 | goto out_gunlock_q; | |
1578 | ||
534cf9ca SW |
1579 | error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(ndip, &da, 4) + |
1580 | 4 * RES_LEAF + 4, 0); | |
b3b94faa DT |
1581 | if (error) |
1582 | goto out_ipreserv; | |
1583 | } else { | |
1584 | error = gfs2_trans_begin(sdp, 4 * RES_DINODE + | |
87d21e07 | 1585 | 5 * RES_LEAF + 4, 0); |
b3b94faa DT |
1586 | if (error) |
1587 | goto out_gunlock; | |
1588 | } | |
1589 | ||
1590 | /* Remove the target file, if it exists */ | |
1591 | ||
4327a9bf BP |
1592 | if (nip) |
1593 | error = gfs2_unlink_inode(ndip, ndentry); | |
b3b94faa | 1594 | |
a63b7bbc BM |
1595 | error = update_moved_ino(ip, ndip, dir_rename); |
1596 | if (error) | |
1597 | goto out_end_trans; | |
b3b94faa | 1598 | |
855d23ce | 1599 | error = gfs2_dir_del(odip, odentry); |
b3b94faa DT |
1600 | if (error) |
1601 | goto out_end_trans; | |
1602 | ||
2b47dad8 | 1603 | error = gfs2_dir_add(ndir, &ndentry->d_name, ip, &da); |
b3b94faa DT |
1604 | if (error) |
1605 | goto out_end_trans; | |
1606 | ||
feaa7bba | 1607 | out_end_trans: |
b3b94faa | 1608 | gfs2_trans_end(sdp); |
feaa7bba | 1609 | out_ipreserv: |
3c1c0ae1 | 1610 | if (da.nr_blocks) |
b3b94faa | 1611 | gfs2_inplace_release(ndip); |
feaa7bba | 1612 | out_gunlock_q: |
3c1c0ae1 | 1613 | if (da.nr_blocks) |
b3b94faa | 1614 | gfs2_quota_unlock(ndip); |
feaa7bba | 1615 | out_gunlock: |
2b47dad8 | 1616 | gfs2_dir_no_add(&da); |
bc74aaef BP |
1617 | if (gfs2_holder_initialized(&rd_gh)) |
1618 | gfs2_glock_dq_uninit(&rd_gh); | |
1619 | ||
72dbf479 | 1620 | while (x--) { |
ad26967b BP |
1621 | if (gfs2_holder_queued(ghs + x)) |
1622 | gfs2_glock_dq(ghs + x); | |
b3b94faa | 1623 | gfs2_holder_uninit(ghs + x); |
72dbf479 | 1624 | } |
feaa7bba | 1625 | out_gunlock_r: |
6df9f9a2 | 1626 | if (gfs2_holder_initialized(&r_gh)) |
b3b94faa | 1627 | gfs2_glock_dq_uninit(&r_gh); |
feaa7bba | 1628 | out: |
2fba46a0 | 1629 | gfs2_qa_put(ndip); |
b3b94faa DT |
1630 | return error; |
1631 | } | |
1632 | ||
a63b7bbc BM |
1633 | /** |
1634 | * gfs2_exchange - exchange two files | |
1635 | * @odir: Parent directory of old file name | |
1636 | * @odentry: The old dentry of the file | |
1637 | * @ndir: Parent directory of new file name | |
1638 | * @ndentry: The new dentry of the file | |
1639 | * @flags: The rename flags | |
1640 | * | |
1641 | * Returns: errno | |
1642 | */ | |
1643 | ||
1644 | static int gfs2_exchange(struct inode *odir, struct dentry *odentry, | |
1645 | struct inode *ndir, struct dentry *ndentry, | |
1646 | unsigned int flags) | |
1647 | { | |
1648 | struct gfs2_inode *odip = GFS2_I(odir); | |
1649 | struct gfs2_inode *ndip = GFS2_I(ndir); | |
1650 | struct gfs2_inode *oip = GFS2_I(odentry->d_inode); | |
1651 | struct gfs2_inode *nip = GFS2_I(ndentry->d_inode); | |
1652 | struct gfs2_sbd *sdp = GFS2_SB(odir); | |
ad26967b | 1653 | struct gfs2_holder ghs[4], r_gh; |
a63b7bbc BM |
1654 | unsigned int num_gh; |
1655 | unsigned int x; | |
1656 | umode_t old_mode = oip->i_inode.i_mode; | |
1657 | umode_t new_mode = nip->i_inode.i_mode; | |
1658 | int error; | |
1659 | ||
6df9f9a2 | 1660 | gfs2_holder_mark_uninitialized(&r_gh); |
a63b7bbc BM |
1661 | error = gfs2_rindex_update(sdp); |
1662 | if (error) | |
1663 | return error; | |
1664 | ||
1665 | if (odip != ndip) { | |
1666 | error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE, | |
1667 | 0, &r_gh); | |
1668 | if (error) | |
1669 | goto out; | |
1670 | ||
1671 | if (S_ISDIR(old_mode)) { | |
1672 | /* don't move a directory into its subdir */ | |
1673 | error = gfs2_ok_to_move(oip, ndip); | |
1674 | if (error) | |
1675 | goto out_gunlock_r; | |
1676 | } | |
1677 | ||
1678 | if (S_ISDIR(new_mode)) { | |
1679 | /* don't move a directory into its subdir */ | |
1680 | error = gfs2_ok_to_move(nip, odip); | |
1681 | if (error) | |
1682 | goto out_gunlock_r; | |
1683 | } | |
1684 | } | |
1685 | ||
1686 | num_gh = 1; | |
ad26967b | 1687 | gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs); |
a63b7bbc | 1688 | if (odip != ndip) { |
ad26967b BP |
1689 | gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, |
1690 | ghs + num_gh); | |
a63b7bbc BM |
1691 | num_gh++; |
1692 | } | |
ad26967b | 1693 | gfs2_holder_init(oip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs + num_gh); |
a63b7bbc BM |
1694 | num_gh++; |
1695 | ||
ad26967b | 1696 | gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs + num_gh); |
a63b7bbc BM |
1697 | num_gh++; |
1698 | ||
1699 | for (x = 0; x < num_gh; x++) { | |
1700 | error = gfs2_glock_nq(ghs + x); | |
1701 | if (error) | |
1702 | goto out_gunlock; | |
1703 | } | |
1704 | ||
ad26967b BP |
1705 | error = gfs2_glock_async_wait(num_gh, ghs); |
1706 | if (error) | |
1707 | goto out_gunlock; | |
1708 | ||
a63b7bbc BM |
1709 | error = -ENOENT; |
1710 | if (oip->i_inode.i_nlink == 0 || nip->i_inode.i_nlink == 0) | |
1711 | goto out_gunlock; | |
1712 | ||
1713 | error = gfs2_unlink_ok(odip, &odentry->d_name, oip); | |
1714 | if (error) | |
1715 | goto out_gunlock; | |
1716 | error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip); | |
1717 | if (error) | |
1718 | goto out_gunlock; | |
1719 | ||
1720 | if (S_ISDIR(old_mode)) { | |
4609e1f1 | 1721 | error = gfs2_permission(&nop_mnt_idmap, odentry->d_inode, |
549c7297 | 1722 | MAY_WRITE); |
a63b7bbc BM |
1723 | if (error) |
1724 | goto out_gunlock; | |
1725 | } | |
1726 | if (S_ISDIR(new_mode)) { | |
4609e1f1 | 1727 | error = gfs2_permission(&nop_mnt_idmap, ndentry->d_inode, |
549c7297 | 1728 | MAY_WRITE); |
a63b7bbc BM |
1729 | if (error) |
1730 | goto out_gunlock; | |
1731 | } | |
1732 | error = gfs2_trans_begin(sdp, 4 * RES_DINODE + 4 * RES_LEAF, 0); | |
1733 | if (error) | |
1734 | goto out_gunlock; | |
1735 | ||
1736 | error = update_moved_ino(oip, ndip, S_ISDIR(old_mode)); | |
1737 | if (error) | |
1738 | goto out_end_trans; | |
1739 | ||
1740 | error = update_moved_ino(nip, odip, S_ISDIR(new_mode)); | |
1741 | if (error) | |
1742 | goto out_end_trans; | |
1743 | ||
1744 | error = gfs2_dir_mvino(ndip, &ndentry->d_name, oip, | |
1745 | IF2DT(old_mode)); | |
1746 | if (error) | |
1747 | goto out_end_trans; | |
1748 | ||
1749 | error = gfs2_dir_mvino(odip, &odentry->d_name, nip, | |
1750 | IF2DT(new_mode)); | |
1751 | if (error) | |
1752 | goto out_end_trans; | |
1753 | ||
1754 | if (odip != ndip) { | |
1755 | if (S_ISDIR(new_mode) && !S_ISDIR(old_mode)) { | |
1756 | inc_nlink(&odip->i_inode); | |
1757 | drop_nlink(&ndip->i_inode); | |
1758 | } else if (S_ISDIR(old_mode) && !S_ISDIR(new_mode)) { | |
1759 | inc_nlink(&ndip->i_inode); | |
1760 | drop_nlink(&odip->i_inode); | |
1761 | } | |
1762 | } | |
1763 | mark_inode_dirty(&ndip->i_inode); | |
1764 | if (odip != ndip) | |
1765 | mark_inode_dirty(&odip->i_inode); | |
1766 | ||
1767 | out_end_trans: | |
1768 | gfs2_trans_end(sdp); | |
1769 | out_gunlock: | |
1770 | while (x--) { | |
ad26967b BP |
1771 | if (gfs2_holder_queued(ghs + x)) |
1772 | gfs2_glock_dq(ghs + x); | |
a63b7bbc BM |
1773 | gfs2_holder_uninit(ghs + x); |
1774 | } | |
1775 | out_gunlock_r: | |
6df9f9a2 | 1776 | if (gfs2_holder_initialized(&r_gh)) |
a63b7bbc BM |
1777 | gfs2_glock_dq_uninit(&r_gh); |
1778 | out: | |
1779 | return error; | |
1780 | } | |
1781 | ||
e18275ae | 1782 | static int gfs2_rename2(struct mnt_idmap *idmap, struct inode *odir, |
549c7297 CB |
1783 | struct dentry *odentry, struct inode *ndir, |
1784 | struct dentry *ndentry, unsigned int flags) | |
a63b7bbc BM |
1785 | { |
1786 | flags &= ~RENAME_NOREPLACE; | |
1787 | ||
1788 | if (flags & ~RENAME_EXCHANGE) | |
1789 | return -EINVAL; | |
1790 | ||
1791 | if (flags & RENAME_EXCHANGE) | |
1792 | return gfs2_exchange(odir, odentry, ndir, ndentry, flags); | |
1793 | ||
1794 | return gfs2_rename(odir, odentry, ndir, ndentry); | |
1795 | } | |
1796 | ||
536baf02 | 1797 | /** |
6b255391 | 1798 | * gfs2_get_link - Follow a symbolic link |
c177c2ac | 1799 | * @dentry: The dentry of the link |
6b255391 | 1800 | * @inode: The inode of the link |
fceef393 | 1801 | * @done: destructor for return value |
536baf02 | 1802 | * |
c177c2ac | 1803 | * This can handle symlinks of any size. |
536baf02 | 1804 | * |
c177c2ac | 1805 | * Returns: 0 on success or error code |
536baf02 SW |
1806 | */ |
1807 | ||
6b255391 | 1808 | static const char *gfs2_get_link(struct dentry *dentry, |
fceef393 AV |
1809 | struct inode *inode, |
1810 | struct delayed_call *done) | |
536baf02 | 1811 | { |
6b255391 | 1812 | struct gfs2_inode *ip = GFS2_I(inode); |
536baf02 SW |
1813 | struct gfs2_holder i_gh; |
1814 | struct buffer_head *dibh; | |
160b4026 | 1815 | unsigned int size; |
c177c2ac | 1816 | char *buf; |
536baf02 SW |
1817 | int error; |
1818 | ||
6b255391 AV |
1819 | if (!dentry) |
1820 | return ERR_PTR(-ECHILD); | |
1821 | ||
536baf02 SW |
1822 | gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh); |
1823 | error = gfs2_glock_nq(&i_gh); | |
1824 | if (error) { | |
1825 | gfs2_holder_uninit(&i_gh); | |
680baacb | 1826 | return ERR_PTR(error); |
536baf02 SW |
1827 | } |
1828 | ||
a2e0f799 SW |
1829 | size = (unsigned int)i_size_read(&ip->i_inode); |
1830 | if (size == 0) { | |
536baf02 | 1831 | gfs2_consist_inode(ip); |
c177c2ac | 1832 | buf = ERR_PTR(-EIO); |
536baf02 SW |
1833 | goto out; |
1834 | } | |
1835 | ||
1836 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
c177c2ac AV |
1837 | if (error) { |
1838 | buf = ERR_PTR(error); | |
536baf02 | 1839 | goto out; |
536baf02 SW |
1840 | } |
1841 | ||
160b4026 | 1842 | buf = kzalloc(size + 1, GFP_NOFS); |
c177c2ac AV |
1843 | if (!buf) |
1844 | buf = ERR_PTR(-ENOMEM); | |
1845 | else | |
160b4026 | 1846 | memcpy(buf, dibh->b_data + sizeof(struct gfs2_dinode), size); |
536baf02 SW |
1847 | brelse(dibh); |
1848 | out: | |
1849 | gfs2_glock_dq_uninit(&i_gh); | |
680baacb | 1850 | if (!IS_ERR(buf)) |
fceef393 | 1851 | set_delayed_call(done, kfree_link, buf); |
680baacb | 1852 | return buf; |
b3b94faa DT |
1853 | } |
1854 | ||
b3b94faa | 1855 | /** |
c551f66c | 1856 | * gfs2_permission |
4609e1f1 | 1857 | * @idmap: idmap of the mount the inode was found from |
75d5cfbe SW |
1858 | * @inode: The inode |
1859 | * @mask: The mask to be tested | |
b3b94faa | 1860 | * |
300c7d75 SW |
1861 | * This may be called from the VFS directly, or from within GFS2 with the |
1862 | * inode locked, so we look to see if the glock is already locked and only | |
1863 | * lock the glock if its not already been done. | |
1864 | * | |
b3b94faa DT |
1865 | * Returns: errno |
1866 | */ | |
1867 | ||
4609e1f1 | 1868 | int gfs2_permission(struct mnt_idmap *idmap, struct inode *inode, |
549c7297 | 1869 | int mask) |
b3b94faa | 1870 | { |
074d7306 | 1871 | int may_not_block = mask & MAY_NOT_BLOCK; |
b74c79e9 | 1872 | struct gfs2_inode *ip; |
b3b94faa | 1873 | struct gfs2_holder i_gh; |
0abd1557 | 1874 | struct gfs2_glock *gl; |
b3b94faa | 1875 | int error; |
b74c79e9 | 1876 | |
6df9f9a2 | 1877 | gfs2_holder_mark_uninitialized(&i_gh); |
b74c79e9 | 1878 | ip = GFS2_I(inode); |
074d7306 | 1879 | gl = rcu_dereference_check(ip->i_gl, !may_not_block); |
0abd1557 AV |
1880 | if (unlikely(!gl)) { |
1881 | /* inode is getting torn down, must be RCU mode */ | |
074d7306 | 1882 | WARN_ON_ONCE(!may_not_block); |
0abd1557 AV |
1883 | return -ECHILD; |
1884 | } | |
dd00aaeb AD |
1885 | if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) { |
1886 | int noblock = may_not_block ? GL_NOBLOCK : 0; | |
1887 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, | |
1888 | LM_FLAG_ANY | noblock, &i_gh); | |
2e60d768 BM |
1889 | if (error) |
1890 | return error; | |
300c7d75 | 1891 | } |
b3b94faa | 1892 | |
f58ba889 | 1893 | if ((mask & MAY_WRITE) && IS_IMMUTABLE(inode)) |
337684a1 | 1894 | error = -EPERM; |
f58ba889 | 1895 | else |
4609e1f1 | 1896 | error = generic_permission(&nop_mnt_idmap, inode, mask); |
6df9f9a2 | 1897 | if (gfs2_holder_initialized(&i_gh)) |
b3b94faa | 1898 | gfs2_glock_dq_uninit(&i_gh); |
b3b94faa DT |
1899 | |
1900 | return error; | |
1901 | } | |
1902 | ||
ab9bbda0 | 1903 | static int __gfs2_setattr_simple(struct inode *inode, struct iattr *attr) |
194c011f | 1904 | { |
c1632a0f | 1905 | setattr_copy(&nop_mnt_idmap, inode, attr); |
194c011f | 1906 | mark_inode_dirty(inode); |
194c011f SW |
1907 | return 0; |
1908 | } | |
1909 | ||
a4122a95 | 1910 | static int gfs2_setattr_simple(struct inode *inode, struct iattr *attr) |
194c011f SW |
1911 | { |
1912 | int error; | |
1913 | ||
1914 | if (current->journal_info) | |
ab9bbda0 | 1915 | return __gfs2_setattr_simple(inode, attr); |
194c011f | 1916 | |
ab9bbda0 | 1917 | error = gfs2_trans_begin(GFS2_SB(inode), RES_DINODE, 0); |
194c011f SW |
1918 | if (error) |
1919 | return error; | |
1920 | ||
ab9bbda0 SW |
1921 | error = __gfs2_setattr_simple(inode, attr); |
1922 | gfs2_trans_end(GFS2_SB(inode)); | |
194c011f SW |
1923 | return error; |
1924 | } | |
1925 | ||
b3b94faa DT |
1926 | static int setattr_chown(struct inode *inode, struct iattr *attr) |
1927 | { | |
feaa7bba SW |
1928 | struct gfs2_inode *ip = GFS2_I(inode); |
1929 | struct gfs2_sbd *sdp = GFS2_SB(inode); | |
7c06b5d6 EB |
1930 | kuid_t ouid, nuid; |
1931 | kgid_t ogid, ngid; | |
b3b94faa | 1932 | int error; |
2d8d7990 | 1933 | struct gfs2_alloc_parms ap = {}; |
b3b94faa | 1934 | |
2933f925 SW |
1935 | ouid = inode->i_uid; |
1936 | ogid = inode->i_gid; | |
b3b94faa DT |
1937 | nuid = attr->ia_uid; |
1938 | ngid = attr->ia_gid; | |
1939 | ||
6b24c0d2 | 1940 | if (!(attr->ia_valid & ATTR_UID) || uid_eq(ouid, nuid)) |
f4108a60 | 1941 | ouid = nuid = NO_UID_QUOTA_CHANGE; |
6b24c0d2 | 1942 | if (!(attr->ia_valid & ATTR_GID) || gid_eq(ogid, ngid)) |
f4108a60 | 1943 | ogid = ngid = NO_GID_QUOTA_CHANGE; |
2fba46a0 | 1944 | error = gfs2_qa_get(ip); |
62e96cf8 | 1945 | if (error) |
2fba46a0 | 1946 | return error; |
62e96cf8 BP |
1947 | |
1948 | error = gfs2_rindex_update(sdp); | |
1949 | if (error) | |
1950 | goto out; | |
1951 | ||
1952 | error = gfs2_quota_lock(ip, nuid, ngid); | |
1953 | if (error) | |
1954 | goto out; | |
1955 | ||
b8fbf471 AD |
1956 | ap.target = gfs2_get_inode_blocks(&ip->i_inode); |
1957 | ||
6b24c0d2 EB |
1958 | if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) || |
1959 | !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) { | |
b8fbf471 | 1960 | error = gfs2_quota_check(ip, nuid, ngid, &ap); |
b3b94faa DT |
1961 | if (error) |
1962 | goto out_gunlock_q; | |
1963 | } | |
1964 | ||
1965 | error = gfs2_trans_begin(sdp, RES_DINODE + 2 * RES_QUOTA, 0); | |
1966 | if (error) | |
1967 | goto out_gunlock_q; | |
1968 | ||
ab9bbda0 | 1969 | error = gfs2_setattr_simple(inode, attr); |
b3b94faa DT |
1970 | if (error) |
1971 | goto out_end_trans; | |
1972 | ||
6b24c0d2 EB |
1973 | if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) || |
1974 | !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) { | |
39a72580 | 1975 | gfs2_quota_change(ip, -(s64)ap.target, ouid, ogid); |
b8fbf471 | 1976 | gfs2_quota_change(ip, ap.target, nuid, ngid); |
b3b94faa DT |
1977 | } |
1978 | ||
a91ea69f | 1979 | out_end_trans: |
b3b94faa | 1980 | gfs2_trans_end(sdp); |
a91ea69f | 1981 | out_gunlock_q: |
b3b94faa | 1982 | gfs2_quota_unlock(ip); |
62e96cf8 | 1983 | out: |
2fba46a0 | 1984 | gfs2_qa_put(ip); |
b3b94faa DT |
1985 | return error; |
1986 | } | |
1987 | ||
1988 | /** | |
1989 | * gfs2_setattr - Change attributes on an inode | |
c1632a0f | 1990 | * @idmap: idmap of the mount the inode was found from |
b3b94faa DT |
1991 | * @dentry: The dentry which is changing |
1992 | * @attr: The structure describing the change | |
1993 | * | |
1994 | * The VFS layer wants to change one or more of an inodes attributes. Write | |
1995 | * that change out to disk. | |
1996 | * | |
1997 | * Returns: errno | |
1998 | */ | |
1999 | ||
c1632a0f | 2000 | static int gfs2_setattr(struct mnt_idmap *idmap, |
549c7297 | 2001 | struct dentry *dentry, struct iattr *attr) |
b3b94faa | 2002 | { |
2b0143b5 | 2003 | struct inode *inode = d_inode(dentry); |
feaa7bba | 2004 | struct gfs2_inode *ip = GFS2_I(inode); |
b3b94faa DT |
2005 | struct gfs2_holder i_gh; |
2006 | int error; | |
2007 | ||
2fba46a0 | 2008 | error = gfs2_qa_get(ip); |
0a305e49 BP |
2009 | if (error) |
2010 | return error; | |
2011 | ||
b3b94faa DT |
2012 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); |
2013 | if (error) | |
2fba46a0 | 2014 | goto out; |
b3b94faa | 2015 | |
4609e1f1 | 2016 | error = may_setattr(&nop_mnt_idmap, inode, attr->ia_valid); |
d75b9fa0 | 2017 | if (error) |
2fba46a0 | 2018 | goto error; |
b3b94faa | 2019 | |
c1632a0f | 2020 | error = setattr_prepare(&nop_mnt_idmap, dentry, attr); |
b3b94faa | 2021 | if (error) |
2fba46a0 | 2022 | goto error; |
b3b94faa DT |
2023 | |
2024 | if (attr->ia_valid & ATTR_SIZE) | |
ff8f33c8 | 2025 | error = gfs2_setattr_size(inode, attr->ia_size); |
b3b94faa DT |
2026 | else if (attr->ia_valid & (ATTR_UID | ATTR_GID)) |
2027 | error = setattr_chown(inode, attr); | |
e01580bf | 2028 | else { |
ab9bbda0 | 2029 | error = gfs2_setattr_simple(inode, attr); |
e01580bf | 2030 | if (!error && attr->ia_valid & ATTR_MODE) |
13e83a49 | 2031 | error = posix_acl_chmod(&nop_mnt_idmap, dentry, |
e65ce2a5 | 2032 | inode->i_mode); |
e01580bf | 2033 | } |
b3b94faa | 2034 | |
2fba46a0 | 2035 | error: |
b3b94faa DT |
2036 | if (!error) |
2037 | mark_inode_dirty(inode); | |
ab9bbda0 | 2038 | gfs2_glock_dq_uninit(&i_gh); |
2fba46a0 BP |
2039 | out: |
2040 | gfs2_qa_put(ip); | |
b3b94faa DT |
2041 | return error; |
2042 | } | |
2043 | ||
2044 | /** | |
2045 | * gfs2_getattr - Read out an inode's attributes | |
b74d24f7 | 2046 | * @idmap: idmap of the mount the inode was found from |
a528d35e | 2047 | * @path: Object to query |
b3b94faa | 2048 | * @stat: The inode's stats |
a528d35e DH |
2049 | * @request_mask: Mask of STATX_xxx flags indicating the caller's interests |
2050 | * @flags: AT_STATX_xxx setting | |
b3b94faa | 2051 | * |
dcf3dd85 SW |
2052 | * This may be called from the VFS directly, or from within GFS2 with the |
2053 | * inode locked, so we look to see if the glock is already locked and only | |
2054 | * lock the glock if its not already been done. Note that its the NFS | |
2055 | * readdirplus operation which causes this to be called (from filldir) | |
2056 | * with the glock already held. | |
2057 | * | |
b3b94faa DT |
2058 | * Returns: errno |
2059 | */ | |
2060 | ||
b74d24f7 | 2061 | static int gfs2_getattr(struct mnt_idmap *idmap, |
549c7297 | 2062 | const struct path *path, struct kstat *stat, |
a528d35e | 2063 | u32 request_mask, unsigned int flags) |
b3b94faa | 2064 | { |
a528d35e | 2065 | struct inode *inode = d_inode(path->dentry); |
feaa7bba | 2066 | struct gfs2_inode *ip = GFS2_I(inode); |
b3b94faa | 2067 | struct gfs2_holder gh; |
b2623c2f | 2068 | u32 gfsflags; |
b3b94faa DT |
2069 | int error; |
2070 | ||
6df9f9a2 | 2071 | gfs2_holder_mark_uninitialized(&gh); |
7afd88d9 | 2072 | if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) { |
2e60d768 BM |
2073 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); |
2074 | if (error) | |
2075 | return error; | |
b3b94faa DT |
2076 | } |
2077 | ||
b2623c2f AG |
2078 | gfsflags = ip->i_diskflags; |
2079 | if (gfsflags & GFS2_DIF_APPENDONLY) | |
2080 | stat->attributes |= STATX_ATTR_APPEND; | |
2081 | if (gfsflags & GFS2_DIF_IMMUTABLE) | |
2082 | stat->attributes |= STATX_ATTR_IMMUTABLE; | |
2083 | ||
2084 | stat->attributes_mask |= (STATX_ATTR_APPEND | | |
2085 | STATX_ATTR_COMPRESSED | | |
2086 | STATX_ATTR_ENCRYPTED | | |
2087 | STATX_ATTR_IMMUTABLE | | |
2088 | STATX_ATTR_NODUMP); | |
2089 | ||
0d72b928 | 2090 | generic_fillattr(&nop_mnt_idmap, request_mask, inode, stat); |
b2623c2f | 2091 | |
6df9f9a2 | 2092 | if (gfs2_holder_initialized(&gh)) |
dcf3dd85 SW |
2093 | gfs2_glock_dq_uninit(&gh); |
2094 | ||
2095 | return 0; | |
b3b94faa DT |
2096 | } |
2097 | ||
e9079cce SW |
2098 | static int gfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, |
2099 | u64 start, u64 len) | |
2100 | { | |
2101 | struct gfs2_inode *ip = GFS2_I(inode); | |
2102 | struct gfs2_holder gh; | |
2103 | int ret; | |
2104 | ||
aac1a55b | 2105 | inode_lock_shared(inode); |
e9079cce SW |
2106 | |
2107 | ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh); | |
2108 | if (ret) | |
2109 | goto out; | |
2110 | ||
aac1a55b | 2111 | ret = iomap_fiemap(inode, fieinfo, start, len, &gfs2_iomap_ops); |
e9079cce SW |
2112 | |
2113 | gfs2_glock_dq_uninit(&gh); | |
aac1a55b | 2114 | |
e9079cce | 2115 | out: |
aac1a55b | 2116 | inode_unlock_shared(inode); |
e9079cce SW |
2117 | return ret; |
2118 | } | |
2119 | ||
3a27411c AG |
2120 | loff_t gfs2_seek_data(struct file *file, loff_t offset) |
2121 | { | |
2122 | struct inode *inode = file->f_mapping->host; | |
2123 | struct gfs2_inode *ip = GFS2_I(inode); | |
2124 | struct gfs2_holder gh; | |
2125 | loff_t ret; | |
2126 | ||
2127 | inode_lock_shared(inode); | |
2128 | ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh); | |
2129 | if (!ret) | |
2130 | ret = iomap_seek_data(inode, offset, &gfs2_iomap_ops); | |
2131 | gfs2_glock_dq_uninit(&gh); | |
2132 | inode_unlock_shared(inode); | |
2133 | ||
2134 | if (ret < 0) | |
2135 | return ret; | |
2136 | return vfs_setpos(file, ret, inode->i_sb->s_maxbytes); | |
2137 | } | |
2138 | ||
2139 | loff_t gfs2_seek_hole(struct file *file, loff_t offset) | |
2140 | { | |
2141 | struct inode *inode = file->f_mapping->host; | |
2142 | struct gfs2_inode *ip = GFS2_I(inode); | |
2143 | struct gfs2_holder gh; | |
2144 | loff_t ret; | |
2145 | ||
2146 | inode_lock_shared(inode); | |
2147 | ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh); | |
2148 | if (!ret) | |
2149 | ret = iomap_seek_hole(inode, offset, &gfs2_iomap_ops); | |
2150 | gfs2_glock_dq_uninit(&gh); | |
2151 | inode_unlock_shared(inode); | |
2152 | ||
2153 | if (ret < 0) | |
2154 | return ret; | |
2155 | return vfs_setpos(file, ret, inode->i_sb->s_maxbytes); | |
2156 | } | |
2157 | ||
913e9928 | 2158 | static int gfs2_update_time(struct inode *inode, int flags) |
82e938bd AG |
2159 | { |
2160 | struct gfs2_inode *ip = GFS2_I(inode); | |
2161 | struct gfs2_glock *gl = ip->i_gl; | |
2162 | struct gfs2_holder *gh; | |
2163 | int error; | |
2164 | ||
2165 | gh = gfs2_glock_is_locked_by_me(gl); | |
21d9067e | 2166 | if (gh && gl->gl_state != LM_ST_EXCLUSIVE) { |
82e938bd AG |
2167 | gfs2_glock_dq(gh); |
2168 | gfs2_holder_reinit(LM_ST_EXCLUSIVE, 0, gh); | |
2169 | error = gfs2_glock_nq(gh); | |
2170 | if (error) | |
2171 | return error; | |
2172 | } | |
541d4c79 JL |
2173 | generic_update_time(inode, flags); |
2174 | return 0; | |
82e938bd AG |
2175 | } |
2176 | ||
e3a77eeb | 2177 | static const struct inode_operations gfs2_file_iops = { |
e6305c43 | 2178 | .permission = gfs2_permission, |
b3b94faa DT |
2179 | .setattr = gfs2_setattr, |
2180 | .getattr = gfs2_getattr, | |
b3b94faa | 2181 | .listxattr = gfs2_listxattr, |
e9079cce | 2182 | .fiemap = gfs2_fiemap, |
cac2f8b8 | 2183 | .get_inode_acl = gfs2_get_acl, |
e01580bf | 2184 | .set_acl = gfs2_set_acl, |
82e938bd | 2185 | .update_time = gfs2_update_time, |
88b631cb MS |
2186 | .fileattr_get = gfs2_fileattr_get, |
2187 | .fileattr_set = gfs2_fileattr_set, | |
b3b94faa DT |
2188 | }; |
2189 | ||
e3a77eeb | 2190 | static const struct inode_operations gfs2_dir_iops = { |
b3b94faa DT |
2191 | .create = gfs2_create, |
2192 | .lookup = gfs2_lookup, | |
2193 | .link = gfs2_link, | |
2194 | .unlink = gfs2_unlink, | |
2195 | .symlink = gfs2_symlink, | |
2196 | .mkdir = gfs2_mkdir, | |
855d23ce | 2197 | .rmdir = gfs2_unlink, |
b3b94faa | 2198 | .mknod = gfs2_mknod, |
2773bf00 | 2199 | .rename = gfs2_rename2, |
e6305c43 | 2200 | .permission = gfs2_permission, |
b3b94faa DT |
2201 | .setattr = gfs2_setattr, |
2202 | .getattr = gfs2_getattr, | |
b3b94faa | 2203 | .listxattr = gfs2_listxattr, |
e9079cce | 2204 | .fiemap = gfs2_fiemap, |
cac2f8b8 | 2205 | .get_inode_acl = gfs2_get_acl, |
e01580bf | 2206 | .set_acl = gfs2_set_acl, |
82e938bd | 2207 | .update_time = gfs2_update_time, |
6d4ade98 | 2208 | .atomic_open = gfs2_atomic_open, |
88b631cb MS |
2209 | .fileattr_get = gfs2_fileattr_get, |
2210 | .fileattr_set = gfs2_fileattr_set, | |
b3b94faa DT |
2211 | }; |
2212 | ||
e3a77eeb | 2213 | static const struct inode_operations gfs2_symlink_iops = { |
6b255391 | 2214 | .get_link = gfs2_get_link, |
e6305c43 | 2215 | .permission = gfs2_permission, |
b3b94faa DT |
2216 | .setattr = gfs2_setattr, |
2217 | .getattr = gfs2_getattr, | |
b3b94faa | 2218 | .listxattr = gfs2_listxattr, |
e9079cce | 2219 | .fiemap = gfs2_fiemap, |
b3b94faa DT |
2220 | }; |
2221 |