Commit | Line | Data |
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b3b94faa DT |
1 | /* |
2 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. | |
f2741d98 | 3 | * Copyright (C) 2004-2011 Red Hat, Inc. All rights reserved. |
b3b94faa DT |
4 | * |
5 | * This copyrighted material is made available to anyone wishing to use, | |
6 | * modify, copy, or redistribute it subject to the terms and conditions | |
e9fc2aa0 | 7 | * of the GNU General Public License version 2. |
b3b94faa DT |
8 | */ |
9 | ||
b3b94faa DT |
10 | #include <linux/slab.h> |
11 | #include <linux/spinlock.h> | |
12 | #include <linux/completion.h> | |
13 | #include <linux/buffer_head.h> | |
14 | #include <linux/namei.h> | |
b3b94faa DT |
15 | #include <linux/mm.h> |
16 | #include <linux/xattr.h> | |
17 | #include <linux/posix_acl.h> | |
5c676f6d | 18 | #include <linux/gfs2_ondisk.h> |
71b86f56 | 19 | #include <linux/crc32.h> |
e9079cce | 20 | #include <linux/fiemap.h> |
194c011f | 21 | #include <linux/security.h> |
b3b94faa DT |
22 | #include <asm/uaccess.h> |
23 | ||
24 | #include "gfs2.h" | |
5c676f6d | 25 | #include "incore.h" |
b3b94faa DT |
26 | #include "acl.h" |
27 | #include "bmap.h" | |
28 | #include "dir.h" | |
307cf6e6 | 29 | #include "xattr.h" |
b3b94faa DT |
30 | #include "glock.h" |
31 | #include "inode.h" | |
32 | #include "meta_io.h" | |
b3b94faa DT |
33 | #include "quota.h" |
34 | #include "rgrp.h" | |
35 | #include "trans.h" | |
5c676f6d | 36 | #include "util.h" |
b2760583 | 37 | #include "super.h" |
194c011f SW |
38 | #include "glops.h" |
39 | ||
40 | struct gfs2_skip_data { | |
41 | u64 no_addr; | |
42 | int skipped; | |
43 | int non_block; | |
44 | }; | |
45 | ||
46 | static int iget_test(struct inode *inode, void *opaque) | |
47 | { | |
48 | struct gfs2_inode *ip = GFS2_I(inode); | |
49 | struct gfs2_skip_data *data = opaque; | |
50 | ||
51 | if (ip->i_no_addr == data->no_addr) { | |
52 | if (data->non_block && | |
53 | inode->i_state & (I_FREEING|I_CLEAR|I_WILL_FREE)) { | |
54 | data->skipped = 1; | |
55 | return 0; | |
56 | } | |
57 | return 1; | |
58 | } | |
59 | return 0; | |
60 | } | |
61 | ||
62 | static int iget_set(struct inode *inode, void *opaque) | |
63 | { | |
64 | struct gfs2_inode *ip = GFS2_I(inode); | |
65 | struct gfs2_skip_data *data = opaque; | |
66 | ||
67 | if (data->skipped) | |
68 | return -ENOENT; | |
69 | inode->i_ino = (unsigned long)(data->no_addr); | |
70 | ip->i_no_addr = data->no_addr; | |
71 | return 0; | |
72 | } | |
73 | ||
74 | struct inode *gfs2_ilookup(struct super_block *sb, u64 no_addr, int non_block) | |
75 | { | |
76 | unsigned long hash = (unsigned long)no_addr; | |
77 | struct gfs2_skip_data data; | |
78 | ||
79 | data.no_addr = no_addr; | |
80 | data.skipped = 0; | |
81 | data.non_block = non_block; | |
82 | return ilookup5(sb, hash, iget_test, &data); | |
83 | } | |
84 | ||
85 | static struct inode *gfs2_iget(struct super_block *sb, u64 no_addr, | |
86 | int non_block) | |
87 | { | |
88 | struct gfs2_skip_data data; | |
89 | unsigned long hash = (unsigned long)no_addr; | |
90 | ||
91 | data.no_addr = no_addr; | |
92 | data.skipped = 0; | |
93 | data.non_block = non_block; | |
94 | return iget5_locked(sb, hash, iget_test, iget_set, &data); | |
95 | } | |
96 | ||
97 | /** | |
98 | * gfs2_set_iop - Sets inode operations | |
99 | * @inode: The inode with correct i_mode filled in | |
100 | * | |
101 | * GFS2 lookup code fills in vfs inode contents based on info obtained | |
102 | * from directory entry inside gfs2_inode_lookup(). | |
103 | */ | |
104 | ||
105 | static void gfs2_set_iop(struct inode *inode) | |
106 | { | |
107 | struct gfs2_sbd *sdp = GFS2_SB(inode); | |
108 | umode_t mode = inode->i_mode; | |
109 | ||
110 | if (S_ISREG(mode)) { | |
111 | inode->i_op = &gfs2_file_iops; | |
112 | if (gfs2_localflocks(sdp)) | |
113 | inode->i_fop = &gfs2_file_fops_nolock; | |
114 | else | |
115 | inode->i_fop = &gfs2_file_fops; | |
116 | } else if (S_ISDIR(mode)) { | |
117 | inode->i_op = &gfs2_dir_iops; | |
118 | if (gfs2_localflocks(sdp)) | |
119 | inode->i_fop = &gfs2_dir_fops_nolock; | |
120 | else | |
121 | inode->i_fop = &gfs2_dir_fops; | |
122 | } else if (S_ISLNK(mode)) { | |
123 | inode->i_op = &gfs2_symlink_iops; | |
124 | } else { | |
125 | inode->i_op = &gfs2_file_iops; | |
126 | init_special_inode(inode, inode->i_mode, inode->i_rdev); | |
127 | } | |
128 | } | |
129 | ||
130 | /** | |
131 | * gfs2_inode_lookup - Lookup an inode | |
132 | * @sb: The super block | |
133 | * @no_addr: The inode number | |
134 | * @type: The type of the inode | |
135 | * non_block: Can we block on inodes that are being freed? | |
136 | * | |
137 | * Returns: A VFS inode, or an error | |
138 | */ | |
139 | ||
140 | struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned int type, | |
141 | u64 no_addr, u64 no_formal_ino, int non_block) | |
142 | { | |
143 | struct inode *inode; | |
144 | struct gfs2_inode *ip; | |
145 | struct gfs2_glock *io_gl = NULL; | |
146 | int error; | |
147 | ||
148 | inode = gfs2_iget(sb, no_addr, non_block); | |
149 | ip = GFS2_I(inode); | |
150 | ||
151 | if (!inode) | |
ac3beb6a | 152 | return ERR_PTR(-ENOMEM); |
194c011f SW |
153 | |
154 | if (inode->i_state & I_NEW) { | |
155 | struct gfs2_sbd *sdp = GFS2_SB(inode); | |
156 | ip->i_no_formal_ino = no_formal_ino; | |
157 | ||
158 | error = gfs2_glock_get(sdp, no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl); | |
159 | if (unlikely(error)) | |
160 | goto fail; | |
161 | ip->i_gl->gl_object = ip; | |
162 | ||
163 | error = gfs2_glock_get(sdp, no_addr, &gfs2_iopen_glops, CREATE, &io_gl); | |
164 | if (unlikely(error)) | |
165 | goto fail_put; | |
166 | ||
167 | set_bit(GIF_INVALID, &ip->i_flags); | |
168 | error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh); | |
169 | if (unlikely(error)) | |
170 | goto fail_iopen; | |
171 | ||
172 | ip->i_iopen_gh.gh_gl->gl_object = ip; | |
173 | gfs2_glock_put(io_gl); | |
174 | io_gl = NULL; | |
175 | ||
176 | if (type == DT_UNKNOWN) { | |
177 | /* Inode glock must be locked already */ | |
178 | error = gfs2_inode_refresh(GFS2_I(inode)); | |
179 | if (error) | |
180 | goto fail_refresh; | |
181 | } else { | |
182 | inode->i_mode = DT2IF(type); | |
183 | } | |
184 | ||
185 | gfs2_set_iop(inode); | |
186 | unlock_new_inode(inode); | |
187 | } | |
188 | ||
189 | return inode; | |
190 | ||
191 | fail_refresh: | |
a6a4d98b | 192 | ip->i_iopen_gh.gh_flags |= GL_NOCACHE; |
194c011f SW |
193 | ip->i_iopen_gh.gh_gl->gl_object = NULL; |
194 | gfs2_glock_dq_uninit(&ip->i_iopen_gh); | |
195 | fail_iopen: | |
196 | if (io_gl) | |
197 | gfs2_glock_put(io_gl); | |
198 | fail_put: | |
199 | ip->i_gl->gl_object = NULL; | |
200 | gfs2_glock_put(ip->i_gl); | |
201 | fail: | |
202 | iget_failed(inode); | |
203 | return ERR_PTR(error); | |
204 | } | |
205 | ||
206 | struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr, | |
207 | u64 *no_formal_ino, unsigned int blktype) | |
208 | { | |
209 | struct super_block *sb = sdp->sd_vfs; | |
210 | struct gfs2_holder i_gh; | |
211 | struct inode *inode = NULL; | |
212 | int error; | |
213 | ||
214 | /* Must not read in block until block type is verified */ | |
215 | error = gfs2_glock_nq_num(sdp, no_addr, &gfs2_inode_glops, | |
216 | LM_ST_EXCLUSIVE, GL_SKIP, &i_gh); | |
217 | if (error) | |
218 | return ERR_PTR(error); | |
219 | ||
220 | error = gfs2_check_blk_type(sdp, no_addr, blktype); | |
221 | if (error) | |
222 | goto fail; | |
223 | ||
224 | inode = gfs2_inode_lookup(sb, DT_UNKNOWN, no_addr, 0, 1); | |
225 | if (IS_ERR(inode)) | |
226 | goto fail; | |
227 | ||
228 | /* Two extra checks for NFS only */ | |
229 | if (no_formal_ino) { | |
230 | error = -ESTALE; | |
231 | if (GFS2_I(inode)->i_no_formal_ino != *no_formal_ino) | |
232 | goto fail_iput; | |
233 | ||
234 | error = -EIO; | |
235 | if (GFS2_I(inode)->i_diskflags & GFS2_DIF_SYSTEM) | |
236 | goto fail_iput; | |
237 | ||
238 | error = 0; | |
239 | } | |
240 | ||
241 | fail: | |
242 | gfs2_glock_dq_uninit(&i_gh); | |
243 | return error ? ERR_PTR(error) : inode; | |
244 | fail_iput: | |
245 | iput(inode); | |
246 | goto fail; | |
247 | } | |
248 | ||
249 | ||
250 | struct inode *gfs2_lookup_simple(struct inode *dip, const char *name) | |
251 | { | |
252 | struct qstr qstr; | |
253 | struct inode *inode; | |
254 | gfs2_str2qstr(&qstr, name); | |
255 | inode = gfs2_lookupi(dip, &qstr, 1); | |
256 | /* gfs2_lookupi has inconsistent callers: vfs | |
257 | * related routines expect NULL for no entry found, | |
258 | * gfs2_lookup_simple callers expect ENOENT | |
259 | * and do not check for NULL. | |
260 | */ | |
261 | if (inode == NULL) | |
262 | return ERR_PTR(-ENOENT); | |
263 | else | |
264 | return inode; | |
265 | } | |
266 | ||
267 | ||
268 | /** | |
269 | * gfs2_lookupi - Look up a filename in a directory and return its inode | |
270 | * @d_gh: An initialized holder for the directory glock | |
271 | * @name: The name of the inode to look for | |
272 | * @is_root: If 1, ignore the caller's permissions | |
273 | * @i_gh: An uninitialized holder for the new inode glock | |
274 | * | |
275 | * This can be called via the VFS filldir function when NFS is doing | |
276 | * a readdirplus and the inode which its intending to stat isn't | |
277 | * already in cache. In this case we must not take the directory glock | |
278 | * again, since the readdir call will have already taken that lock. | |
279 | * | |
280 | * Returns: errno | |
281 | */ | |
282 | ||
283 | struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name, | |
284 | int is_root) | |
285 | { | |
286 | struct super_block *sb = dir->i_sb; | |
287 | struct gfs2_inode *dip = GFS2_I(dir); | |
288 | struct gfs2_holder d_gh; | |
289 | int error = 0; | |
290 | struct inode *inode = NULL; | |
291 | int unlock = 0; | |
292 | ||
293 | if (!name->len || name->len > GFS2_FNAMESIZE) | |
294 | return ERR_PTR(-ENAMETOOLONG); | |
295 | ||
296 | if ((name->len == 1 && memcmp(name->name, ".", 1) == 0) || | |
297 | (name->len == 2 && memcmp(name->name, "..", 2) == 0 && | |
2b0143b5 | 298 | dir == d_inode(sb->s_root))) { |
194c011f SW |
299 | igrab(dir); |
300 | return dir; | |
301 | } | |
302 | ||
303 | if (gfs2_glock_is_locked_by_me(dip->i_gl) == NULL) { | |
304 | error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh); | |
305 | if (error) | |
306 | return ERR_PTR(error); | |
307 | unlock = 1; | |
308 | } | |
309 | ||
310 | if (!is_root) { | |
10556cb2 | 311 | error = gfs2_permission(dir, MAY_EXEC); |
194c011f SW |
312 | if (error) |
313 | goto out; | |
314 | } | |
315 | ||
5a00f3cc | 316 | inode = gfs2_dir_search(dir, name, false); |
194c011f SW |
317 | if (IS_ERR(inode)) |
318 | error = PTR_ERR(inode); | |
319 | out: | |
320 | if (unlock) | |
321 | gfs2_glock_dq_uninit(&d_gh); | |
322 | if (error == -ENOENT) | |
323 | return NULL; | |
324 | return inode ? inode : ERR_PTR(error); | |
325 | } | |
326 | ||
327 | /** | |
328 | * create_ok - OK to create a new on-disk inode here? | |
329 | * @dip: Directory in which dinode is to be created | |
330 | * @name: Name of new dinode | |
331 | * @mode: | |
332 | * | |
333 | * Returns: errno | |
334 | */ | |
335 | ||
336 | static int create_ok(struct gfs2_inode *dip, const struct qstr *name, | |
175a4eb7 | 337 | umode_t mode) |
194c011f SW |
338 | { |
339 | int error; | |
340 | ||
10556cb2 | 341 | error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC); |
194c011f SW |
342 | if (error) |
343 | return error; | |
344 | ||
345 | /* Don't create entries in an unlinked directory */ | |
346 | if (!dip->i_inode.i_nlink) | |
347 | return -ENOENT; | |
348 | ||
194c011f SW |
349 | if (dip->i_entries == (u32)-1) |
350 | return -EFBIG; | |
351 | if (S_ISDIR(mode) && dip->i_inode.i_nlink == (u32)-1) | |
352 | return -EMLINK; | |
353 | ||
354 | return 0; | |
355 | } | |
356 | ||
c9aecf73 SW |
357 | static void munge_mode_uid_gid(const struct gfs2_inode *dip, |
358 | struct inode *inode) | |
194c011f SW |
359 | { |
360 | if (GFS2_SB(&dip->i_inode)->sd_args.ar_suiddir && | |
6b24c0d2 EB |
361 | (dip->i_inode.i_mode & S_ISUID) && |
362 | !uid_eq(dip->i_inode.i_uid, GLOBAL_ROOT_UID)) { | |
c9aecf73 SW |
363 | if (S_ISDIR(inode->i_mode)) |
364 | inode->i_mode |= S_ISUID; | |
6b24c0d2 | 365 | else if (!uid_eq(dip->i_inode.i_uid, current_fsuid())) |
c9aecf73 SW |
366 | inode->i_mode &= ~07111; |
367 | inode->i_uid = dip->i_inode.i_uid; | |
194c011f | 368 | } else |
c9aecf73 | 369 | inode->i_uid = current_fsuid(); |
194c011f SW |
370 | |
371 | if (dip->i_inode.i_mode & S_ISGID) { | |
c9aecf73 SW |
372 | if (S_ISDIR(inode->i_mode)) |
373 | inode->i_mode |= S_ISGID; | |
374 | inode->i_gid = dip->i_inode.i_gid; | |
194c011f | 375 | } else |
c9aecf73 | 376 | inode->i_gid = current_fsgid(); |
194c011f SW |
377 | } |
378 | ||
b2c8b3ea | 379 | static int alloc_dinode(struct gfs2_inode *ip, u32 flags, unsigned *dblocks) |
194c011f | 380 | { |
c9aecf73 | 381 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b2c8b3ea | 382 | struct gfs2_alloc_parms ap = { .target = *dblocks, .aflags = flags, }; |
194c011f SW |
383 | int error; |
384 | ||
b8fbf471 | 385 | error = gfs2_quota_lock_check(ip, &ap); |
194c011f SW |
386 | if (error) |
387 | goto out; | |
388 | ||
7b9cff46 | 389 | error = gfs2_inplace_reserve(ip, &ap); |
fd4b4e04 SW |
390 | if (error) |
391 | goto out_quota; | |
392 | ||
b2c8b3ea | 393 | error = gfs2_trans_begin(sdp, (*dblocks * RES_RG_BIT) + RES_STATFS + RES_QUOTA, 0); |
194c011f SW |
394 | if (error) |
395 | goto out_ipreserv; | |
396 | ||
b2c8b3ea | 397 | error = gfs2_alloc_blocks(ip, &ip->i_no_addr, dblocks, 1, &ip->i_generation); |
c9aecf73 SW |
398 | ip->i_no_formal_ino = ip->i_generation; |
399 | ip->i_inode.i_ino = ip->i_no_addr; | |
400 | ip->i_goal = ip->i_no_addr; | |
194c011f SW |
401 | |
402 | gfs2_trans_end(sdp); | |
403 | ||
404 | out_ipreserv: | |
c9aecf73 | 405 | gfs2_inplace_release(ip); |
fd4b4e04 SW |
406 | out_quota: |
407 | gfs2_quota_unlock(ip); | |
194c011f | 408 | out: |
194c011f SW |
409 | return error; |
410 | } | |
411 | ||
f2741d98 SW |
412 | static void gfs2_init_dir(struct buffer_head *dibh, |
413 | const struct gfs2_inode *parent) | |
e2d0a13b SW |
414 | { |
415 | struct gfs2_dinode *di = (struct gfs2_dinode *)dibh->b_data; | |
416 | struct gfs2_dirent *dent = (struct gfs2_dirent *)(di+1); | |
417 | ||
418 | gfs2_qstr2dirent(&gfs2_qdot, GFS2_DIRENT_SIZE(gfs2_qdot.len), dent); | |
419 | dent->de_inum = di->di_num; /* already GFS2 endian */ | |
420 | dent->de_type = cpu_to_be16(DT_DIR); | |
421 | ||
422 | dent = (struct gfs2_dirent *)((char*)dent + GFS2_DIRENT_SIZE(1)); | |
423 | gfs2_qstr2dirent(&gfs2_qdotdot, dibh->b_size - GFS2_DIRENT_SIZE(1) - sizeof(struct gfs2_dinode), dent); | |
424 | gfs2_inum_out(parent, dent); | |
425 | dent->de_type = cpu_to_be16(DT_DIR); | |
426 | ||
427 | } | |
428 | ||
b2c8b3ea SW |
429 | /** |
430 | * gfs2_init_xattr - Initialise an xattr block for a new inode | |
431 | * @ip: The inode in question | |
432 | * | |
433 | * This sets up an empty xattr block for a new inode, ready to | |
434 | * take any ACLs, LSM xattrs, etc. | |
435 | */ | |
436 | ||
437 | static void gfs2_init_xattr(struct gfs2_inode *ip) | |
438 | { | |
439 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); | |
440 | struct buffer_head *bh; | |
441 | struct gfs2_ea_header *ea; | |
442 | ||
443 | bh = gfs2_meta_new(ip->i_gl, ip->i_eattr); | |
444 | gfs2_trans_add_meta(ip->i_gl, bh); | |
445 | gfs2_metatype_set(bh, GFS2_METATYPE_EA, GFS2_FORMAT_EA); | |
446 | gfs2_buffer_clear_tail(bh, sizeof(struct gfs2_meta_header)); | |
447 | ||
448 | ea = GFS2_EA_BH2FIRST(bh); | |
449 | ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize); | |
450 | ea->ea_type = GFS2_EATYPE_UNUSED; | |
451 | ea->ea_flags = GFS2_EAFLAG_LAST; | |
452 | ||
453 | brelse(bh); | |
454 | } | |
455 | ||
194c011f SW |
456 | /** |
457 | * init_dinode - Fill in a new dinode structure | |
f2741d98 | 458 | * @dip: The directory this inode is being created in |
c9aecf73 | 459 | * @ip: The inode |
f2741d98 | 460 | * @symname: The symlink destination (if a symlink) |
f2741d98 | 461 | * @bhp: The buffer head (returned to caller) |
194c011f SW |
462 | * |
463 | */ | |
464 | ||
c9aecf73 | 465 | static void init_dinode(struct gfs2_inode *dip, struct gfs2_inode *ip, |
79ba7480 | 466 | const char *symname) |
194c011f | 467 | { |
194c011f SW |
468 | struct gfs2_dinode *di; |
469 | struct buffer_head *dibh; | |
194c011f | 470 | |
c9aecf73 | 471 | dibh = gfs2_meta_new(ip->i_gl, ip->i_no_addr); |
350a9b0a | 472 | gfs2_trans_add_meta(ip->i_gl, dibh); |
194c011f | 473 | di = (struct gfs2_dinode *)dibh->b_data; |
79ba7480 | 474 | gfs2_dinode_out(ip, di); |
194c011f | 475 | |
c9aecf73 SW |
476 | di->di_major = cpu_to_be32(MAJOR(ip->i_inode.i_rdev)); |
477 | di->di_minor = cpu_to_be32(MINOR(ip->i_inode.i_rdev)); | |
194c011f | 478 | di->__pad1 = 0; |
194c011f SW |
479 | di->__pad2 = 0; |
480 | di->__pad3 = 0; | |
194c011f | 481 | memset(&di->__pad4, 0, sizeof(di->__pad4)); |
194c011f | 482 | memset(&di->di_reserved, 0, sizeof(di->di_reserved)); |
79ba7480 | 483 | gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode)); |
160b4026 | 484 | |
c9aecf73 | 485 | switch(ip->i_inode.i_mode & S_IFMT) { |
160b4026 | 486 | case S_IFDIR: |
e2d0a13b | 487 | gfs2_init_dir(dibh, dip); |
160b4026 SW |
488 | break; |
489 | case S_IFLNK: | |
c9aecf73 | 490 | memcpy(dibh->b_data + sizeof(struct gfs2_dinode), symname, ip->i_inode.i_size); |
160b4026 | 491 | break; |
e2d0a13b SW |
492 | } |
493 | ||
194c011f | 494 | set_buffer_uptodate(dibh); |
79ba7480 | 495 | brelse(dibh); |
194c011f SW |
496 | } |
497 | ||
534cf9ca SW |
498 | /** |
499 | * gfs2_trans_da_blocks - Calculate number of blocks to link inode | |
500 | * @dip: The directory we are linking into | |
501 | * @da: The dir add information | |
502 | * @nr_inodes: The number of inodes involved | |
503 | * | |
504 | * This calculate the number of blocks we need to reserve in a | |
505 | * transaction to link @nr_inodes into a directory. In most cases | |
506 | * @nr_inodes will be 2 (the directory plus the inode being linked in) | |
507 | * but in case of rename, 4 may be required. | |
508 | * | |
509 | * Returns: Number of blocks | |
510 | */ | |
511 | ||
512 | static unsigned gfs2_trans_da_blks(const struct gfs2_inode *dip, | |
513 | const struct gfs2_diradd *da, | |
514 | unsigned nr_inodes) | |
515 | { | |
516 | return da->nr_blocks + gfs2_rg_blocks(dip, da->nr_blocks) + | |
517 | (nr_inodes * RES_DINODE) + RES_QUOTA + RES_STATFS; | |
518 | } | |
519 | ||
194c011f | 520 | static int link_dinode(struct gfs2_inode *dip, const struct qstr *name, |
3c1c0ae1 | 521 | struct gfs2_inode *ip, struct gfs2_diradd *da) |
194c011f SW |
522 | { |
523 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); | |
3c1c0ae1 | 524 | struct gfs2_alloc_parms ap = { .target = da->nr_blocks, }; |
194c011f SW |
525 | int error; |
526 | ||
3c1c0ae1 | 527 | if (da->nr_blocks) { |
b8fbf471 | 528 | error = gfs2_quota_lock_check(dip, &ap); |
194c011f SW |
529 | if (error) |
530 | goto fail_quota_locks; | |
531 | ||
7b9cff46 | 532 | error = gfs2_inplace_reserve(dip, &ap); |
194c011f SW |
533 | if (error) |
534 | goto fail_quota_locks; | |
535 | ||
534cf9ca | 536 | error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, da, 2), 0); |
194c011f SW |
537 | if (error) |
538 | goto fail_ipreserv; | |
539 | } else { | |
540 | error = gfs2_trans_begin(sdp, RES_LEAF + 2 * RES_DINODE, 0); | |
541 | if (error) | |
542 | goto fail_quota_locks; | |
543 | } | |
544 | ||
2b47dad8 | 545 | error = gfs2_dir_add(&dip->i_inode, name, ip, da); |
194c011f | 546 | |
194c011f | 547 | gfs2_trans_end(sdp); |
194c011f | 548 | fail_ipreserv: |
fd4b4e04 | 549 | gfs2_inplace_release(dip); |
194c011f SW |
550 | fail_quota_locks: |
551 | gfs2_quota_unlock(dip); | |
194c011f SW |
552 | return error; |
553 | } | |
554 | ||
46cc1e5f | 555 | static int gfs2_initxattrs(struct inode *inode, const struct xattr *xattr_array, |
9d8f13ba | 556 | void *fs_info) |
194c011f | 557 | { |
9d8f13ba MZ |
558 | const struct xattr *xattr; |
559 | int err = 0; | |
560 | ||
561 | for (xattr = xattr_array; xattr->name != NULL; xattr++) { | |
562 | err = __gfs2_xattr_set(inode, xattr->name, xattr->value, | |
563 | xattr->value_len, 0, | |
564 | GFS2_EATYPE_SECURITY); | |
565 | if (err < 0) | |
566 | break; | |
194c011f | 567 | } |
194c011f SW |
568 | return err; |
569 | } | |
b3b94faa | 570 | |
194c011f | 571 | /** |
f2741d98 SW |
572 | * gfs2_create_inode - Create a new inode |
573 | * @dir: The parent directory | |
574 | * @dentry: The new dentry | |
6d4ade98 | 575 | * @file: If non-NULL, the file which is being opened |
f2741d98 SW |
576 | * @mode: The permissions on the new inode |
577 | * @dev: For device nodes, this is the device number | |
578 | * @symname: For symlinks, this is the link destination | |
579 | * @size: The initial size of the inode (ignored for directories) | |
194c011f | 580 | * |
f2741d98 | 581 | * Returns: 0 on success, or error code |
194c011f SW |
582 | */ |
583 | ||
f2741d98 | 584 | static int gfs2_create_inode(struct inode *dir, struct dentry *dentry, |
6d4ade98 | 585 | struct file *file, |
175a4eb7 | 586 | umode_t mode, dev_t dev, const char *symname, |
6d4ade98 | 587 | unsigned int size, int excl, int *opened) |
194c011f | 588 | { |
f2741d98 | 589 | const struct qstr *name = &dentry->d_name; |
e01580bf | 590 | struct posix_acl *default_acl, *acl; |
f2741d98 | 591 | struct gfs2_holder ghs[2]; |
194c011f | 592 | struct inode *inode = NULL; |
8e2e0047 | 593 | struct gfs2_inode *dip = GFS2_I(dir), *ip; |
194c011f | 594 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); |
c9aecf73 | 595 | struct gfs2_glock *io_gl; |
05978803 | 596 | int error, free_vfs_inode = 0; |
9dbe9610 | 597 | u32 aflags = 0; |
b2c8b3ea | 598 | unsigned blocks = 1; |
19aeb5a6 | 599 | struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, }; |
194c011f SW |
600 | |
601 | if (!name->len || name->len > GFS2_FNAMESIZE) | |
f2741d98 | 602 | return -ENAMETOOLONG; |
194c011f | 603 | |
0a305e49 BP |
604 | error = gfs2_rs_alloc(dip); |
605 | if (error) | |
606 | return error; | |
607 | ||
fd4b4e04 SW |
608 | error = gfs2_rindex_update(sdp); |
609 | if (error) | |
610 | return error; | |
611 | ||
f2741d98 | 612 | error = gfs2_glock_nq_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); |
194c011f SW |
613 | if (error) |
614 | goto fail; | |
615 | ||
616 | error = create_ok(dip, name, mode); | |
5a00f3cc SW |
617 | if (error) |
618 | goto fail_gunlock; | |
619 | ||
620 | inode = gfs2_dir_search(dir, &dentry->d_name, !S_ISREG(mode) || excl); | |
621 | error = PTR_ERR(inode); | |
622 | if (!IS_ERR(inode)) { | |
571a4b57 AV |
623 | if (S_ISDIR(inode->i_mode)) { |
624 | iput(inode); | |
625 | inode = ERR_PTR(-EISDIR); | |
626 | goto fail_gunlock; | |
627 | } | |
44bb31ba | 628 | d_instantiate(dentry, inode); |
6d4ade98 | 629 | error = 0; |
0d0d1107 | 630 | if (file) { |
44bb31ba | 631 | if (S_ISREG(inode->i_mode)) |
5ca1db41 | 632 | error = finish_open(file, dentry, gfs2_open_common, opened); |
44bb31ba AV |
633 | else |
634 | error = finish_no_open(file, NULL); | |
6d4ade98 | 635 | } |
9a63edd1 | 636 | gfs2_glock_dq_uninit(ghs); |
6d4ade98 | 637 | return error; |
5a00f3cc | 638 | } else if (error != -ENOENT) { |
194c011f | 639 | goto fail_gunlock; |
5a00f3cc | 640 | } |
194c011f | 641 | |
3c1c0ae1 | 642 | error = gfs2_diradd_alloc_required(dir, name, &da); |
fd4b4e04 SW |
643 | if (error < 0) |
644 | goto fail_gunlock; | |
645 | ||
c9aecf73 | 646 | inode = new_inode(sdp->sd_vfs); |
fd4b4e04 SW |
647 | error = -ENOMEM; |
648 | if (!inode) | |
649 | goto fail_gunlock; | |
650 | ||
e01580bf CH |
651 | error = posix_acl_create(dir, &mode, &default_acl, &acl); |
652 | if (error) | |
653 | goto fail_free_vfs_inode; | |
654 | ||
c9aecf73 SW |
655 | ip = GFS2_I(inode); |
656 | error = gfs2_rs_alloc(ip); | |
194c011f | 657 | if (error) |
e01580bf | 658 | goto fail_free_acls; |
c9aecf73 | 659 | |
c9aecf73 | 660 | inode->i_mode = mode; |
79ba7480 | 661 | set_nlink(inode, S_ISDIR(mode) ? 2 : 1); |
c9aecf73 SW |
662 | inode->i_rdev = dev; |
663 | inode->i_size = size; | |
fd4b4e04 | 664 | inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; |
28fb3027 | 665 | gfs2_set_inode_blocks(inode, 1); |
c9aecf73 | 666 | munge_mode_uid_gid(dip, inode); |
00a158be | 667 | check_and_update_goal(dip); |
c9aecf73 | 668 | ip->i_goal = dip->i_goal; |
28fb3027 SW |
669 | ip->i_diskflags = 0; |
670 | ip->i_eattr = 0; | |
671 | ip->i_height = 0; | |
672 | ip->i_depth = 0; | |
673 | ip->i_entries = 0; | |
674 | ||
675 | switch(mode & S_IFMT) { | |
676 | case S_IFREG: | |
677 | if ((dip->i_diskflags & GFS2_DIF_INHERIT_JDATA) || | |
678 | gfs2_tune_get(sdp, gt_new_files_jdata)) | |
679 | ip->i_diskflags |= GFS2_DIF_JDATA; | |
680 | gfs2_set_aops(inode); | |
681 | break; | |
682 | case S_IFDIR: | |
683 | ip->i_diskflags |= (dip->i_diskflags & GFS2_DIF_INHERIT_JDATA); | |
684 | ip->i_diskflags |= GFS2_DIF_JDATA; | |
685 | ip->i_entries = 2; | |
686 | break; | |
687 | } | |
688 | gfs2_set_inode_flags(inode); | |
194c011f | 689 | |
2b0143b5 | 690 | if ((GFS2_I(d_inode(sdp->sd_root_dir)) == dip) || |
9dbe9610 SW |
691 | (dip->i_diskflags & GFS2_DIF_TOPDIR)) |
692 | aflags |= GFS2_AF_ORLOV; | |
693 | ||
b2c8b3ea SW |
694 | if (default_acl || acl) |
695 | blocks++; | |
696 | ||
697 | error = alloc_dinode(ip, aflags, &blocks); | |
194c011f | 698 | if (error) |
c9aecf73 | 699 | goto fail_free_inode; |
194c011f | 700 | |
b2c8b3ea SW |
701 | gfs2_set_inode_blocks(inode, blocks); |
702 | ||
c9aecf73 | 703 | error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl); |
194c011f | 704 | if (error) |
c9aecf73 | 705 | goto fail_free_inode; |
194c011f | 706 | |
1e2d9d44 | 707 | ip->i_gl->gl_object = ip; |
c9aecf73 SW |
708 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1); |
709 | if (error) | |
710 | goto fail_free_inode; | |
711 | ||
b2c8b3ea | 712 | error = gfs2_trans_begin(sdp, blocks, 0); |
c9aecf73 | 713 | if (error) |
194c011f SW |
714 | goto fail_gunlock2; |
715 | ||
b2c8b3ea SW |
716 | if (blocks > 1) { |
717 | ip->i_eattr = ip->i_no_addr + 1; | |
718 | gfs2_init_xattr(ip); | |
719 | } | |
79ba7480 | 720 | init_dinode(dip, ip, symname); |
fd4b4e04 SW |
721 | gfs2_trans_end(sdp); |
722 | ||
c9aecf73 | 723 | error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_iopen_glops, CREATE, &io_gl); |
194c011f SW |
724 | if (error) |
725 | goto fail_gunlock2; | |
726 | ||
c9aecf73 | 727 | error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh); |
ff7f4cb4 SW |
728 | if (error) |
729 | goto fail_gunlock2; | |
0a305e49 | 730 | |
c9aecf73 SW |
731 | ip->i_iopen_gh.gh_gl->gl_object = ip; |
732 | gfs2_glock_put(io_gl); | |
733 | gfs2_set_iop(inode); | |
734 | insert_inode_hash(inode); | |
735 | ||
e01580bf CH |
736 | if (default_acl) { |
737 | error = gfs2_set_acl(inode, default_acl, ACL_TYPE_DEFAULT); | |
738 | posix_acl_release(default_acl); | |
739 | } | |
740 | if (acl) { | |
741 | if (!error) | |
742 | error = gfs2_set_acl(inode, acl, ACL_TYPE_ACCESS); | |
743 | posix_acl_release(acl); | |
744 | } | |
745 | ||
194c011f | 746 | if (error) |
c9aecf73 | 747 | goto fail_gunlock3; |
194c011f | 748 | |
f45dc26d BP |
749 | error = security_inode_init_security(&ip->i_inode, &dip->i_inode, name, |
750 | &gfs2_initxattrs, NULL); | |
194c011f | 751 | if (error) |
c9aecf73 | 752 | goto fail_gunlock3; |
194c011f | 753 | |
3c1c0ae1 | 754 | error = link_dinode(dip, name, ip, &da); |
194c011f | 755 | if (error) |
c9aecf73 | 756 | goto fail_gunlock3; |
194c011f | 757 | |
79ba7480 | 758 | mark_inode_dirty(inode); |
6d4ade98 | 759 | d_instantiate(dentry, inode); |
c5bf8fef MS |
760 | if (file) { |
761 | *opened |= FILE_CREATED; | |
6d4ade98 | 762 | error = finish_open(file, dentry, gfs2_open_common, opened); |
c5bf8fef | 763 | } |
28fb3027 SW |
764 | gfs2_glock_dq_uninit(ghs); |
765 | gfs2_glock_dq_uninit(ghs + 1); | |
6d4ade98 | 766 | return error; |
194c011f | 767 | |
c9aecf73 SW |
768 | fail_gunlock3: |
769 | gfs2_glock_dq_uninit(ghs + 1); | |
770 | if (ip->i_gl) | |
771 | gfs2_glock_put(ip->i_gl); | |
772 | goto fail_gunlock; | |
773 | ||
194c011f SW |
774 | fail_gunlock2: |
775 | gfs2_glock_dq_uninit(ghs + 1); | |
c9aecf73 SW |
776 | fail_free_inode: |
777 | if (ip->i_gl) | |
778 | gfs2_glock_put(ip->i_gl); | |
af5c2697 | 779 | gfs2_rs_delete(ip, NULL); |
e01580bf CH |
780 | fail_free_acls: |
781 | if (default_acl) | |
782 | posix_acl_release(default_acl); | |
783 | if (acl) | |
784 | posix_acl_release(acl); | |
785 | fail_free_vfs_inode: | |
05978803 | 786 | free_vfs_inode = 1; |
194c011f | 787 | fail_gunlock: |
2b47dad8 | 788 | gfs2_dir_no_add(&da); |
f2741d98 | 789 | gfs2_glock_dq_uninit(ghs); |
40ac218f | 790 | if (inode && !IS_ERR(inode)) { |
79ba7480 | 791 | clear_nlink(inode); |
05978803 AD |
792 | if (!free_vfs_inode) |
793 | mark_inode_dirty(inode); | |
794 | set_bit(free_vfs_inode ? GIF_FREE_VFS_INODE : GIF_ALLOC_FAILED, | |
795 | &GFS2_I(inode)->i_flags); | |
40ac218f SW |
796 | iput(inode); |
797 | } | |
194c011f | 798 | fail: |
f2741d98 | 799 | return error; |
194c011f | 800 | } |
f2741d98 | 801 | |
b3b94faa DT |
802 | /** |
803 | * gfs2_create - Create a file | |
804 | * @dir: The directory in which to create the file | |
805 | * @dentry: The dentry of the new file | |
806 | * @mode: The mode of the new file | |
807 | * | |
808 | * Returns: errno | |
809 | */ | |
810 | ||
811 | static int gfs2_create(struct inode *dir, struct dentry *dentry, | |
ebfc3b49 | 812 | umode_t mode, bool excl) |
b3b94faa | 813 | { |
6d4ade98 | 814 | return gfs2_create_inode(dir, dentry, NULL, S_IFREG | mode, 0, NULL, 0, excl, NULL); |
b3b94faa DT |
815 | } |
816 | ||
817 | /** | |
6d4ade98 | 818 | * __gfs2_lookup - Look up a filename in a directory and return its inode |
b3b94faa DT |
819 | * @dir: The directory inode |
820 | * @dentry: The dentry of the new inode | |
6d4ade98 SW |
821 | * @file: File to be opened |
822 | * @opened: atomic_open flags | |
b3b94faa | 823 | * |
b3b94faa DT |
824 | * |
825 | * Returns: errno | |
826 | */ | |
827 | ||
6d4ade98 SW |
828 | static struct dentry *__gfs2_lookup(struct inode *dir, struct dentry *dentry, |
829 | struct file *file, int *opened) | |
b3b94faa | 830 | { |
6d4ade98 SW |
831 | struct inode *inode; |
832 | struct dentry *d; | |
833 | struct gfs2_holder gh; | |
834 | struct gfs2_glock *gl; | |
835 | int error; | |
836 | ||
837 | inode = gfs2_lookupi(dir, &dentry->d_name, 0); | |
7b7a9115 BC |
838 | if (inode == NULL) { |
839 | d_add(dentry, NULL); | |
6d4ade98 | 840 | return NULL; |
7b7a9115 | 841 | } |
6d4ade98 SW |
842 | if (IS_ERR(inode)) |
843 | return ERR_CAST(inode); | |
844 | ||
845 | gl = GFS2_I(inode)->i_gl; | |
846 | error = gfs2_glock_nq_init(gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); | |
847 | if (error) { | |
848 | iput(inode); | |
849 | return ERR_PTR(error); | |
9656b2c1 | 850 | } |
6d4ade98 SW |
851 | |
852 | d = d_splice_alias(inode, dentry); | |
d57b9c9a | 853 | if (IS_ERR(d)) { |
d57b9c9a BF |
854 | gfs2_glock_dq_uninit(&gh); |
855 | return d; | |
856 | } | |
6d4ade98 SW |
857 | if (file && S_ISREG(inode->i_mode)) |
858 | error = finish_open(file, dentry, gfs2_open_common, opened); | |
859 | ||
860 | gfs2_glock_dq_uninit(&gh); | |
5ca1db41 MS |
861 | if (error) { |
862 | dput(d); | |
6d4ade98 | 863 | return ERR_PTR(error); |
5ca1db41 | 864 | } |
6d4ade98 SW |
865 | return d; |
866 | } | |
867 | ||
868 | static struct dentry *gfs2_lookup(struct inode *dir, struct dentry *dentry, | |
869 | unsigned flags) | |
870 | { | |
871 | return __gfs2_lookup(dir, dentry, NULL, NULL); | |
b3b94faa DT |
872 | } |
873 | ||
874 | /** | |
875 | * gfs2_link - Link to a file | |
876 | * @old_dentry: The inode to link | |
877 | * @dir: Add link to this directory | |
878 | * @dentry: The name of the link | |
879 | * | |
880 | * Link the inode in "old_dentry" into the directory "dir" with the | |
881 | * name in "dentry". | |
882 | * | |
883 | * Returns: errno | |
884 | */ | |
885 | ||
886 | static int gfs2_link(struct dentry *old_dentry, struct inode *dir, | |
887 | struct dentry *dentry) | |
888 | { | |
feaa7bba SW |
889 | struct gfs2_inode *dip = GFS2_I(dir); |
890 | struct gfs2_sbd *sdp = GFS2_SB(dir); | |
2b0143b5 | 891 | struct inode *inode = d_inode(old_dentry); |
feaa7bba | 892 | struct gfs2_inode *ip = GFS2_I(inode); |
b3b94faa | 893 | struct gfs2_holder ghs[2]; |
2baee03f | 894 | struct buffer_head *dibh; |
19aeb5a6 | 895 | struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, }; |
b3b94faa DT |
896 | int error; |
897 | ||
b60623c2 | 898 | if (S_ISDIR(inode->i_mode)) |
b3b94faa DT |
899 | return -EPERM; |
900 | ||
0a305e49 BP |
901 | error = gfs2_rs_alloc(dip); |
902 | if (error) | |
903 | return error; | |
904 | ||
b3b94faa DT |
905 | gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); |
906 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); | |
907 | ||
72dbf479 BP |
908 | error = gfs2_glock_nq(ghs); /* parent */ |
909 | if (error) | |
910 | goto out_parent; | |
911 | ||
912 | error = gfs2_glock_nq(ghs + 1); /* child */ | |
b3b94faa | 913 | if (error) |
72dbf479 | 914 | goto out_child; |
b3b94faa | 915 | |
d192a8e5 SW |
916 | error = -ENOENT; |
917 | if (inode->i_nlink == 0) | |
918 | goto out_gunlock; | |
919 | ||
10556cb2 | 920 | error = gfs2_permission(dir, MAY_WRITE | MAY_EXEC); |
b3b94faa DT |
921 | if (error) |
922 | goto out_gunlock; | |
923 | ||
dbb7cae2 | 924 | error = gfs2_dir_check(dir, &dentry->d_name, NULL); |
b3b94faa DT |
925 | switch (error) { |
926 | case -ENOENT: | |
927 | break; | |
928 | case 0: | |
929 | error = -EEXIST; | |
930 | default: | |
931 | goto out_gunlock; | |
932 | } | |
933 | ||
934 | error = -EINVAL; | |
4f56110a | 935 | if (!dip->i_inode.i_nlink) |
b3b94faa DT |
936 | goto out_gunlock; |
937 | error = -EFBIG; | |
ad6203f2 | 938 | if (dip->i_entries == (u32)-1) |
b3b94faa DT |
939 | goto out_gunlock; |
940 | error = -EPERM; | |
941 | if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) | |
942 | goto out_gunlock; | |
943 | error = -EINVAL; | |
4f56110a | 944 | if (!ip->i_inode.i_nlink) |
b3b94faa DT |
945 | goto out_gunlock; |
946 | error = -EMLINK; | |
4f56110a | 947 | if (ip->i_inode.i_nlink == (u32)-1) |
b3b94faa DT |
948 | goto out_gunlock; |
949 | ||
3c1c0ae1 | 950 | error = gfs2_diradd_alloc_required(dir, &dentry->d_name, &da); |
c752666c | 951 | if (error < 0) |
b3b94faa DT |
952 | goto out_gunlock; |
953 | ||
3c1c0ae1 SW |
954 | if (da.nr_blocks) { |
955 | struct gfs2_alloc_parms ap = { .target = da.nr_blocks, }; | |
b8fbf471 | 956 | error = gfs2_quota_lock_check(dip, &ap); |
b3b94faa | 957 | if (error) |
5407e242 | 958 | goto out_gunlock; |
b3b94faa | 959 | |
7b9cff46 | 960 | error = gfs2_inplace_reserve(dip, &ap); |
b3b94faa DT |
961 | if (error) |
962 | goto out_gunlock_q; | |
963 | ||
534cf9ca | 964 | error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, &da, 2), 0); |
b3b94faa DT |
965 | if (error) |
966 | goto out_ipres; | |
967 | } else { | |
968 | error = gfs2_trans_begin(sdp, 2 * RES_DINODE + RES_LEAF, 0); | |
969 | if (error) | |
970 | goto out_ipres; | |
971 | } | |
972 | ||
2baee03f | 973 | error = gfs2_meta_inode_buffer(ip, &dibh); |
b3b94faa DT |
974 | if (error) |
975 | goto out_end_trans; | |
976 | ||
2b47dad8 | 977 | error = gfs2_dir_add(dir, &dentry->d_name, ip, &da); |
2baee03f SW |
978 | if (error) |
979 | goto out_brelse; | |
980 | ||
350a9b0a | 981 | gfs2_trans_add_meta(ip->i_gl, dibh); |
2baee03f SW |
982 | inc_nlink(&ip->i_inode); |
983 | ip->i_inode.i_ctime = CURRENT_TIME; | |
ab9bbda0 SW |
984 | ihold(inode); |
985 | d_instantiate(dentry, inode); | |
986 | mark_inode_dirty(inode); | |
b3b94faa | 987 | |
2baee03f SW |
988 | out_brelse: |
989 | brelse(dibh); | |
feaa7bba | 990 | out_end_trans: |
b3b94faa | 991 | gfs2_trans_end(sdp); |
feaa7bba | 992 | out_ipres: |
3c1c0ae1 | 993 | if (da.nr_blocks) |
b3b94faa | 994 | gfs2_inplace_release(dip); |
feaa7bba | 995 | out_gunlock_q: |
3c1c0ae1 | 996 | if (da.nr_blocks) |
b3b94faa | 997 | gfs2_quota_unlock(dip); |
feaa7bba | 998 | out_gunlock: |
2b47dad8 | 999 | gfs2_dir_no_add(&da); |
72dbf479 BP |
1000 | gfs2_glock_dq(ghs + 1); |
1001 | out_child: | |
1002 | gfs2_glock_dq(ghs); | |
1003 | out_parent: | |
b3b94faa DT |
1004 | gfs2_holder_uninit(ghs); |
1005 | gfs2_holder_uninit(ghs + 1); | |
b3b94faa DT |
1006 | return error; |
1007 | } | |
1008 | ||
87ec2174 SW |
1009 | /* |
1010 | * gfs2_unlink_ok - check to see that a inode is still in a directory | |
1011 | * @dip: the directory | |
1012 | * @name: the name of the file | |
1013 | * @ip: the inode | |
1014 | * | |
1015 | * Assumes that the lock on (at least) @dip is held. | |
1016 | * | |
1017 | * Returns: 0 if the parent/child relationship is correct, errno if it isn't | |
1018 | */ | |
1019 | ||
1020 | static int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name, | |
1021 | const struct gfs2_inode *ip) | |
1022 | { | |
1023 | int error; | |
1024 | ||
1025 | if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode)) | |
1026 | return -EPERM; | |
1027 | ||
1028 | if ((dip->i_inode.i_mode & S_ISVTX) && | |
6b24c0d2 EB |
1029 | !uid_eq(dip->i_inode.i_uid, current_fsuid()) && |
1030 | !uid_eq(ip->i_inode.i_uid, current_fsuid()) && !capable(CAP_FOWNER)) | |
87ec2174 SW |
1031 | return -EPERM; |
1032 | ||
1033 | if (IS_APPEND(&dip->i_inode)) | |
1034 | return -EPERM; | |
1035 | ||
10556cb2 | 1036 | error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC); |
87ec2174 SW |
1037 | if (error) |
1038 | return error; | |
1039 | ||
37975f15 | 1040 | return gfs2_dir_check(&dip->i_inode, name, ip); |
87ec2174 SW |
1041 | } |
1042 | ||
b3b94faa | 1043 | /** |
855d23ce SW |
1044 | * gfs2_unlink_inode - Removes an inode from its parent dir and unlinks it |
1045 | * @dip: The parent directory | |
1046 | * @name: The name of the entry in the parent directory | |
855d23ce SW |
1047 | * @inode: The inode to be removed |
1048 | * | |
1049 | * Called with all the locks and in a transaction. This will only be | |
1050 | * called for a directory after it has been checked to ensure it is empty. | |
1051 | * | |
1052 | * Returns: 0 on success, or an error | |
1053 | */ | |
1054 | ||
1055 | static int gfs2_unlink_inode(struct gfs2_inode *dip, | |
4327a9bf | 1056 | const struct dentry *dentry) |
855d23ce | 1057 | { |
2b0143b5 | 1058 | struct inode *inode = d_inode(dentry); |
855d23ce SW |
1059 | struct gfs2_inode *ip = GFS2_I(inode); |
1060 | int error; | |
1061 | ||
1062 | error = gfs2_dir_del(dip, dentry); | |
1063 | if (error) | |
1064 | return error; | |
1065 | ||
1066 | ip->i_entries = 0; | |
1067 | inode->i_ctime = CURRENT_TIME; | |
1068 | if (S_ISDIR(inode->i_mode)) | |
1069 | clear_nlink(inode); | |
1070 | else | |
1071 | drop_nlink(inode); | |
855d23ce SW |
1072 | mark_inode_dirty(inode); |
1073 | if (inode->i_nlink == 0) | |
1074 | gfs2_unlink_di(inode); | |
1075 | return 0; | |
1076 | } | |
1077 | ||
1078 | ||
1079 | /** | |
1080 | * gfs2_unlink - Unlink an inode (this does rmdir as well) | |
1081 | * @dir: The inode of the directory containing the inode to unlink | |
b3b94faa DT |
1082 | * @dentry: The file itself |
1083 | * | |
855d23ce SW |
1084 | * This routine uses the type of the inode as a flag to figure out |
1085 | * whether this is an unlink or an rmdir. | |
b3b94faa DT |
1086 | * |
1087 | * Returns: errno | |
1088 | */ | |
1089 | ||
1090 | static int gfs2_unlink(struct inode *dir, struct dentry *dentry) | |
1091 | { | |
feaa7bba SW |
1092 | struct gfs2_inode *dip = GFS2_I(dir); |
1093 | struct gfs2_sbd *sdp = GFS2_SB(dir); | |
2b0143b5 | 1094 | struct inode *inode = d_inode(dentry); |
855d23ce | 1095 | struct gfs2_inode *ip = GFS2_I(inode); |
ddee7608 RC |
1096 | struct gfs2_holder ghs[3]; |
1097 | struct gfs2_rgrpd *rgd; | |
5e2f7d61 BP |
1098 | int error; |
1099 | ||
1100 | error = gfs2_rindex_update(sdp); | |
1101 | if (error) | |
1102 | return error; | |
1103 | ||
1104 | error = -EROFS; | |
b3b94faa | 1105 | |
b3b94faa | 1106 | gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); |
ddee7608 | 1107 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); |
b3b94faa | 1108 | |
66fc061b | 1109 | rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr, 1); |
a365fbf3 | 1110 | if (!rgd) |
87654896 | 1111 | goto out_inodes; |
a365fbf3 | 1112 | |
ddee7608 RC |
1113 | gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2); |
1114 | ||
1115 | ||
8497a46e | 1116 | error = gfs2_glock_nq(ghs); /* parent */ |
b3b94faa | 1117 | if (error) |
8497a46e SW |
1118 | goto out_parent; |
1119 | ||
1120 | error = gfs2_glock_nq(ghs + 1); /* child */ | |
1121 | if (error) | |
1122 | goto out_child; | |
1123 | ||
d192a8e5 | 1124 | error = -ENOENT; |
855d23ce | 1125 | if (inode->i_nlink == 0) |
d192a8e5 SW |
1126 | goto out_rgrp; |
1127 | ||
855d23ce SW |
1128 | if (S_ISDIR(inode->i_mode)) { |
1129 | error = -ENOTEMPTY; | |
1130 | if (ip->i_entries > 2 || inode->i_nlink > 2) | |
1131 | goto out_rgrp; | |
1132 | } | |
1133 | ||
8497a46e SW |
1134 | error = gfs2_glock_nq(ghs + 2); /* rgrp */ |
1135 | if (error) | |
1136 | goto out_rgrp; | |
b3b94faa DT |
1137 | |
1138 | error = gfs2_unlink_ok(dip, &dentry->d_name, ip); | |
1139 | if (error) | |
72dbf479 | 1140 | goto out_gunlock; |
b3b94faa | 1141 | |
855d23ce | 1142 | error = gfs2_trans_begin(sdp, 2*RES_DINODE + 3*RES_LEAF + RES_RG_BIT, 0); |
855d23ce SW |
1143 | if (error) |
1144 | goto out_end_trans; | |
b3b94faa | 1145 | |
4327a9bf | 1146 | error = gfs2_unlink_inode(dip, dentry); |
b3b94faa | 1147 | |
feaa7bba SW |
1148 | out_end_trans: |
1149 | gfs2_trans_end(sdp); | |
72dbf479 | 1150 | out_gunlock: |
8497a46e SW |
1151 | gfs2_glock_dq(ghs + 2); |
1152 | out_rgrp: | |
8497a46e SW |
1153 | gfs2_glock_dq(ghs + 1); |
1154 | out_child: | |
8497a46e SW |
1155 | gfs2_glock_dq(ghs); |
1156 | out_parent: | |
87654896 SW |
1157 | gfs2_holder_uninit(ghs + 2); |
1158 | out_inodes: | |
1159 | gfs2_holder_uninit(ghs + 1); | |
8497a46e | 1160 | gfs2_holder_uninit(ghs); |
b3b94faa DT |
1161 | return error; |
1162 | } | |
1163 | ||
1164 | /** | |
1165 | * gfs2_symlink - Create a symlink | |
1166 | * @dir: The directory to create the symlink in | |
1167 | * @dentry: The dentry to put the symlink in | |
1168 | * @symname: The thing which the link points to | |
1169 | * | |
1170 | * Returns: errno | |
1171 | */ | |
1172 | ||
1173 | static int gfs2_symlink(struct inode *dir, struct dentry *dentry, | |
1174 | const char *symname) | |
1175 | { | |
feaa7bba | 1176 | struct gfs2_sbd *sdp = GFS2_SB(dir); |
160b4026 | 1177 | unsigned int size; |
b3b94faa | 1178 | |
b3b94faa DT |
1179 | size = strlen(symname); |
1180 | if (size > sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode) - 1) | |
1181 | return -ENAMETOOLONG; | |
1182 | ||
6d4ade98 | 1183 | return gfs2_create_inode(dir, dentry, NULL, S_IFLNK | S_IRWXUGO, 0, symname, size, 0, NULL); |
b3b94faa DT |
1184 | } |
1185 | ||
1186 | /** | |
1187 | * gfs2_mkdir - Make a directory | |
1188 | * @dir: The parent directory of the new one | |
1189 | * @dentry: The dentry of the new directory | |
1190 | * @mode: The mode of the new directory | |
1191 | * | |
1192 | * Returns: errno | |
1193 | */ | |
1194 | ||
18bb1db3 | 1195 | static int gfs2_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) |
b3b94faa | 1196 | { |
28fb3027 SW |
1197 | struct gfs2_sbd *sdp = GFS2_SB(dir); |
1198 | unsigned dsize = sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode); | |
6d4ade98 | 1199 | return gfs2_create_inode(dir, dentry, NULL, S_IFDIR | mode, 0, NULL, dsize, 0, NULL); |
b3b94faa DT |
1200 | } |
1201 | ||
b3b94faa DT |
1202 | /** |
1203 | * gfs2_mknod - Make a special file | |
1204 | * @dir: The directory in which the special file will reside | |
1205 | * @dentry: The dentry of the special file | |
1206 | * @mode: The mode of the special file | |
f2741d98 | 1207 | * @dev: The device specification of the special file |
b3b94faa DT |
1208 | * |
1209 | */ | |
1210 | ||
1a67aafb | 1211 | static int gfs2_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, |
b3b94faa DT |
1212 | dev_t dev) |
1213 | { | |
6d4ade98 SW |
1214 | return gfs2_create_inode(dir, dentry, NULL, mode, dev, NULL, 0, 0, NULL); |
1215 | } | |
1216 | ||
1217 | /** | |
1218 | * gfs2_atomic_open - Atomically open a file | |
1219 | * @dir: The directory | |
1220 | * @dentry: The proposed new entry | |
1221 | * @file: The proposed new struct file | |
1222 | * @flags: open flags | |
1223 | * @mode: File mode | |
1224 | * @opened: Flag to say whether the file has been opened or not | |
1225 | * | |
1226 | * Returns: error code or 0 for success | |
1227 | */ | |
1228 | ||
1229 | static int gfs2_atomic_open(struct inode *dir, struct dentry *dentry, | |
86fbca49 AO |
1230 | struct file *file, unsigned flags, |
1231 | umode_t mode, int *opened) | |
6d4ade98 SW |
1232 | { |
1233 | struct dentry *d; | |
1234 | bool excl = !!(flags & O_EXCL); | |
1235 | ||
4d93bc3e AV |
1236 | if (!d_unhashed(dentry)) |
1237 | goto skip_lookup; | |
1238 | ||
6d4ade98 SW |
1239 | d = __gfs2_lookup(dir, dentry, file, opened); |
1240 | if (IS_ERR(d)) | |
1241 | return PTR_ERR(d); | |
5ca1db41 MS |
1242 | if (d != NULL) |
1243 | dentry = d; | |
2b0143b5 | 1244 | if (d_really_is_positive(dentry)) { |
ec7d879c AV |
1245 | if (!(*opened & FILE_OPENED)) |
1246 | return finish_no_open(file, d); | |
5ca1db41 | 1247 | dput(d); |
6d4ade98 SW |
1248 | return 0; |
1249 | } | |
1250 | ||
5ca1db41 | 1251 | BUG_ON(d != NULL); |
4d93bc3e AV |
1252 | |
1253 | skip_lookup: | |
6d4ade98 SW |
1254 | if (!(flags & O_CREAT)) |
1255 | return -ENOENT; | |
1256 | ||
1257 | return gfs2_create_inode(dir, dentry, file, S_IFREG | mode, 0, NULL, 0, excl, opened); | |
b3b94faa DT |
1258 | } |
1259 | ||
0188d6c5 SW |
1260 | /* |
1261 | * gfs2_ok_to_move - check if it's ok to move a directory to another directory | |
1262 | * @this: move this | |
1263 | * @to: to here | |
1264 | * | |
1265 | * Follow @to back to the root and make sure we don't encounter @this | |
1266 | * Assumes we already hold the rename lock. | |
1267 | * | |
1268 | * Returns: errno | |
1269 | */ | |
1270 | ||
1271 | static int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to) | |
1272 | { | |
1273 | struct inode *dir = &to->i_inode; | |
1274 | struct super_block *sb = dir->i_sb; | |
1275 | struct inode *tmp; | |
0188d6c5 SW |
1276 | int error = 0; |
1277 | ||
0188d6c5 SW |
1278 | igrab(dir); |
1279 | ||
1280 | for (;;) { | |
1281 | if (dir == &this->i_inode) { | |
1282 | error = -EINVAL; | |
1283 | break; | |
1284 | } | |
2b0143b5 | 1285 | if (dir == d_inode(sb->s_root)) { |
0188d6c5 SW |
1286 | error = 0; |
1287 | break; | |
1288 | } | |
1289 | ||
8d123585 | 1290 | tmp = gfs2_lookupi(dir, &gfs2_qdotdot, 1); |
48f8f711 AD |
1291 | if (!tmp) { |
1292 | error = -ENOENT; | |
1293 | break; | |
1294 | } | |
0188d6c5 SW |
1295 | if (IS_ERR(tmp)) { |
1296 | error = PTR_ERR(tmp); | |
1297 | break; | |
1298 | } | |
1299 | ||
1300 | iput(dir); | |
1301 | dir = tmp; | |
1302 | } | |
1303 | ||
1304 | iput(dir); | |
1305 | ||
1306 | return error; | |
1307 | } | |
1308 | ||
a63b7bbc BM |
1309 | /** |
1310 | * update_moved_ino - Update an inode that's being moved | |
1311 | * @ip: The inode being moved | |
1312 | * @ndip: The parent directory of the new filename | |
1313 | * @dir_rename: True of ip is a directory | |
1314 | * | |
1315 | * Returns: errno | |
1316 | */ | |
1317 | ||
1318 | static int update_moved_ino(struct gfs2_inode *ip, struct gfs2_inode *ndip, | |
1319 | int dir_rename) | |
1320 | { | |
1321 | int error; | |
1322 | struct buffer_head *dibh; | |
1323 | ||
1324 | if (dir_rename) | |
1325 | return gfs2_dir_mvino(ip, &gfs2_qdotdot, ndip, DT_DIR); | |
1326 | ||
1327 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1328 | if (error) | |
1329 | return error; | |
1330 | ip->i_inode.i_ctime = CURRENT_TIME; | |
1331 | gfs2_trans_add_meta(ip->i_gl, dibh); | |
1332 | gfs2_dinode_out(ip, dibh->b_data); | |
1333 | brelse(dibh); | |
1334 | return 0; | |
1335 | } | |
1336 | ||
1337 | ||
b3b94faa DT |
1338 | /** |
1339 | * gfs2_rename - Rename a file | |
1340 | * @odir: Parent directory of old file name | |
1341 | * @odentry: The old dentry of the file | |
1342 | * @ndir: Parent directory of new file name | |
1343 | * @ndentry: The new dentry of the file | |
1344 | * | |
1345 | * Returns: errno | |
1346 | */ | |
1347 | ||
1348 | static int gfs2_rename(struct inode *odir, struct dentry *odentry, | |
1349 | struct inode *ndir, struct dentry *ndentry) | |
1350 | { | |
feaa7bba SW |
1351 | struct gfs2_inode *odip = GFS2_I(odir); |
1352 | struct gfs2_inode *ndip = GFS2_I(ndir); | |
2b0143b5 | 1353 | struct gfs2_inode *ip = GFS2_I(d_inode(odentry)); |
b3b94faa | 1354 | struct gfs2_inode *nip = NULL; |
feaa7bba | 1355 | struct gfs2_sbd *sdp = GFS2_SB(odir); |
8339ee54 | 1356 | struct gfs2_holder ghs[5], r_gh = { .gh_gl = NULL, }; |
ddee7608 | 1357 | struct gfs2_rgrpd *nrgd; |
b3b94faa DT |
1358 | unsigned int num_gh; |
1359 | int dir_rename = 0; | |
19aeb5a6 | 1360 | struct gfs2_diradd da = { .nr_blocks = 0, .save_loc = 0, }; |
b3b94faa DT |
1361 | unsigned int x; |
1362 | int error; | |
1363 | ||
2b0143b5 DH |
1364 | if (d_really_is_positive(ndentry)) { |
1365 | nip = GFS2_I(d_inode(ndentry)); | |
b3b94faa DT |
1366 | if (ip == nip) |
1367 | return 0; | |
1368 | } | |
1369 | ||
5e2f7d61 BP |
1370 | error = gfs2_rindex_update(sdp); |
1371 | if (error) | |
1372 | return error; | |
1373 | ||
0a305e49 BP |
1374 | error = gfs2_rs_alloc(ndip); |
1375 | if (error) | |
1376 | return error; | |
1377 | ||
0188d6c5 SW |
1378 | if (odip != ndip) { |
1379 | error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE, | |
1380 | 0, &r_gh); | |
b3b94faa DT |
1381 | if (error) |
1382 | goto out; | |
1383 | ||
0188d6c5 SW |
1384 | if (S_ISDIR(ip->i_inode.i_mode)) { |
1385 | dir_rename = 1; | |
a63b7bbc | 1386 | /* don't move a directory into its subdir */ |
0188d6c5 SW |
1387 | error = gfs2_ok_to_move(ip, ndip); |
1388 | if (error) | |
1389 | goto out_gunlock_r; | |
1390 | } | |
b3b94faa DT |
1391 | } |
1392 | ||
d9d1ca30 | 1393 | num_gh = 1; |
b3b94faa | 1394 | gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); |
d9d1ca30 SW |
1395 | if (odip != ndip) { |
1396 | gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); | |
1397 | num_gh++; | |
1398 | } | |
1399 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); | |
1400 | num_gh++; | |
b3b94faa | 1401 | |
d9d1ca30 SW |
1402 | if (nip) { |
1403 | gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); | |
1404 | num_gh++; | |
ddee7608 RC |
1405 | /* grab the resource lock for unlink flag twiddling |
1406 | * this is the case of the target file already existing | |
1407 | * so we unlink before doing the rename | |
1408 | */ | |
66fc061b | 1409 | nrgd = gfs2_blk2rgrpd(sdp, nip->i_no_addr, 1); |
ddee7608 RC |
1410 | if (nrgd) |
1411 | gfs2_holder_init(nrgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh++); | |
d9d1ca30 | 1412 | } |
b3b94faa | 1413 | |
72dbf479 BP |
1414 | for (x = 0; x < num_gh; x++) { |
1415 | error = gfs2_glock_nq(ghs + x); | |
1416 | if (error) | |
1417 | goto out_gunlock; | |
1418 | } | |
b3b94faa | 1419 | |
d192a8e5 SW |
1420 | error = -ENOENT; |
1421 | if (ip->i_inode.i_nlink == 0) | |
1422 | goto out_gunlock; | |
1423 | ||
b3b94faa DT |
1424 | /* Check out the old directory */ |
1425 | ||
1426 | error = gfs2_unlink_ok(odip, &odentry->d_name, ip); | |
1427 | if (error) | |
1428 | goto out_gunlock; | |
1429 | ||
1430 | /* Check out the new directory */ | |
1431 | ||
1432 | if (nip) { | |
1433 | error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip); | |
1434 | if (error) | |
1435 | goto out_gunlock; | |
1436 | ||
d192a8e5 SW |
1437 | if (nip->i_inode.i_nlink == 0) { |
1438 | error = -EAGAIN; | |
1439 | goto out_gunlock; | |
1440 | } | |
1441 | ||
b60623c2 | 1442 | if (S_ISDIR(nip->i_inode.i_mode)) { |
ad6203f2 | 1443 | if (nip->i_entries < 2) { |
94fb763b | 1444 | gfs2_consist_inode(nip); |
b3b94faa DT |
1445 | error = -EIO; |
1446 | goto out_gunlock; | |
1447 | } | |
ad6203f2 | 1448 | if (nip->i_entries > 2) { |
b3b94faa DT |
1449 | error = -ENOTEMPTY; |
1450 | goto out_gunlock; | |
1451 | } | |
1452 | } | |
1453 | } else { | |
10556cb2 | 1454 | error = gfs2_permission(ndir, MAY_WRITE | MAY_EXEC); |
b3b94faa DT |
1455 | if (error) |
1456 | goto out_gunlock; | |
1457 | ||
dbb7cae2 | 1458 | error = gfs2_dir_check(ndir, &ndentry->d_name, NULL); |
b3b94faa DT |
1459 | switch (error) { |
1460 | case -ENOENT: | |
1461 | error = 0; | |
1462 | break; | |
1463 | case 0: | |
1464 | error = -EEXIST; | |
1465 | default: | |
1466 | goto out_gunlock; | |
1467 | }; | |
1468 | ||
1469 | if (odip != ndip) { | |
4f56110a | 1470 | if (!ndip->i_inode.i_nlink) { |
d192a8e5 | 1471 | error = -ENOENT; |
b3b94faa DT |
1472 | goto out_gunlock; |
1473 | } | |
ad6203f2 | 1474 | if (ndip->i_entries == (u32)-1) { |
b3b94faa DT |
1475 | error = -EFBIG; |
1476 | goto out_gunlock; | |
1477 | } | |
b60623c2 | 1478 | if (S_ISDIR(ip->i_inode.i_mode) && |
4f56110a | 1479 | ndip->i_inode.i_nlink == (u32)-1) { |
b3b94faa DT |
1480 | error = -EMLINK; |
1481 | goto out_gunlock; | |
1482 | } | |
1483 | } | |
1484 | } | |
1485 | ||
1486 | /* Check out the dir to be renamed */ | |
1487 | ||
1488 | if (dir_rename) { | |
2b0143b5 | 1489 | error = gfs2_permission(d_inode(odentry), MAY_WRITE); |
b3b94faa DT |
1490 | if (error) |
1491 | goto out_gunlock; | |
1492 | } | |
1493 | ||
3c1c0ae1 SW |
1494 | if (nip == NULL) { |
1495 | error = gfs2_diradd_alloc_required(ndir, &ndentry->d_name, &da); | |
1496 | if (error) | |
1497 | goto out_gunlock; | |
1498 | } | |
b3b94faa | 1499 | |
3c1c0ae1 SW |
1500 | if (da.nr_blocks) { |
1501 | struct gfs2_alloc_parms ap = { .target = da.nr_blocks, }; | |
b8fbf471 | 1502 | error = gfs2_quota_lock_check(ndip, &ap); |
b3b94faa | 1503 | if (error) |
5407e242 | 1504 | goto out_gunlock; |
b3b94faa | 1505 | |
7b9cff46 | 1506 | error = gfs2_inplace_reserve(ndip, &ap); |
b3b94faa DT |
1507 | if (error) |
1508 | goto out_gunlock_q; | |
1509 | ||
534cf9ca SW |
1510 | error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(ndip, &da, 4) + |
1511 | 4 * RES_LEAF + 4, 0); | |
b3b94faa DT |
1512 | if (error) |
1513 | goto out_ipreserv; | |
1514 | } else { | |
1515 | error = gfs2_trans_begin(sdp, 4 * RES_DINODE + | |
87d21e07 | 1516 | 5 * RES_LEAF + 4, 0); |
b3b94faa DT |
1517 | if (error) |
1518 | goto out_gunlock; | |
1519 | } | |
1520 | ||
1521 | /* Remove the target file, if it exists */ | |
1522 | ||
4327a9bf BP |
1523 | if (nip) |
1524 | error = gfs2_unlink_inode(ndip, ndentry); | |
b3b94faa | 1525 | |
a63b7bbc BM |
1526 | error = update_moved_ino(ip, ndip, dir_rename); |
1527 | if (error) | |
1528 | goto out_end_trans; | |
b3b94faa | 1529 | |
855d23ce | 1530 | error = gfs2_dir_del(odip, odentry); |
b3b94faa DT |
1531 | if (error) |
1532 | goto out_end_trans; | |
1533 | ||
2b47dad8 | 1534 | error = gfs2_dir_add(ndir, &ndentry->d_name, ip, &da); |
b3b94faa DT |
1535 | if (error) |
1536 | goto out_end_trans; | |
1537 | ||
feaa7bba | 1538 | out_end_trans: |
b3b94faa | 1539 | gfs2_trans_end(sdp); |
feaa7bba | 1540 | out_ipreserv: |
3c1c0ae1 | 1541 | if (da.nr_blocks) |
b3b94faa | 1542 | gfs2_inplace_release(ndip); |
feaa7bba | 1543 | out_gunlock_q: |
3c1c0ae1 | 1544 | if (da.nr_blocks) |
b3b94faa | 1545 | gfs2_quota_unlock(ndip); |
feaa7bba | 1546 | out_gunlock: |
2b47dad8 | 1547 | gfs2_dir_no_add(&da); |
72dbf479 BP |
1548 | while (x--) { |
1549 | gfs2_glock_dq(ghs + x); | |
b3b94faa | 1550 | gfs2_holder_uninit(ghs + x); |
72dbf479 | 1551 | } |
feaa7bba | 1552 | out_gunlock_r: |
0188d6c5 | 1553 | if (r_gh.gh_gl) |
b3b94faa | 1554 | gfs2_glock_dq_uninit(&r_gh); |
feaa7bba | 1555 | out: |
b3b94faa DT |
1556 | return error; |
1557 | } | |
1558 | ||
a63b7bbc BM |
1559 | /** |
1560 | * gfs2_exchange - exchange two files | |
1561 | * @odir: Parent directory of old file name | |
1562 | * @odentry: The old dentry of the file | |
1563 | * @ndir: Parent directory of new file name | |
1564 | * @ndentry: The new dentry of the file | |
1565 | * @flags: The rename flags | |
1566 | * | |
1567 | * Returns: errno | |
1568 | */ | |
1569 | ||
1570 | static int gfs2_exchange(struct inode *odir, struct dentry *odentry, | |
1571 | struct inode *ndir, struct dentry *ndentry, | |
1572 | unsigned int flags) | |
1573 | { | |
1574 | struct gfs2_inode *odip = GFS2_I(odir); | |
1575 | struct gfs2_inode *ndip = GFS2_I(ndir); | |
1576 | struct gfs2_inode *oip = GFS2_I(odentry->d_inode); | |
1577 | struct gfs2_inode *nip = GFS2_I(ndentry->d_inode); | |
1578 | struct gfs2_sbd *sdp = GFS2_SB(odir); | |
1579 | struct gfs2_holder ghs[5], r_gh = { .gh_gl = NULL, }; | |
1580 | unsigned int num_gh; | |
1581 | unsigned int x; | |
1582 | umode_t old_mode = oip->i_inode.i_mode; | |
1583 | umode_t new_mode = nip->i_inode.i_mode; | |
1584 | int error; | |
1585 | ||
1586 | error = gfs2_rindex_update(sdp); | |
1587 | if (error) | |
1588 | return error; | |
1589 | ||
1590 | if (odip != ndip) { | |
1591 | error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE, | |
1592 | 0, &r_gh); | |
1593 | if (error) | |
1594 | goto out; | |
1595 | ||
1596 | if (S_ISDIR(old_mode)) { | |
1597 | /* don't move a directory into its subdir */ | |
1598 | error = gfs2_ok_to_move(oip, ndip); | |
1599 | if (error) | |
1600 | goto out_gunlock_r; | |
1601 | } | |
1602 | ||
1603 | if (S_ISDIR(new_mode)) { | |
1604 | /* don't move a directory into its subdir */ | |
1605 | error = gfs2_ok_to_move(nip, odip); | |
1606 | if (error) | |
1607 | goto out_gunlock_r; | |
1608 | } | |
1609 | } | |
1610 | ||
1611 | num_gh = 1; | |
1612 | gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); | |
1613 | if (odip != ndip) { | |
1614 | gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); | |
1615 | num_gh++; | |
1616 | } | |
1617 | gfs2_holder_init(oip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); | |
1618 | num_gh++; | |
1619 | ||
1620 | gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); | |
1621 | num_gh++; | |
1622 | ||
1623 | for (x = 0; x < num_gh; x++) { | |
1624 | error = gfs2_glock_nq(ghs + x); | |
1625 | if (error) | |
1626 | goto out_gunlock; | |
1627 | } | |
1628 | ||
1629 | error = -ENOENT; | |
1630 | if (oip->i_inode.i_nlink == 0 || nip->i_inode.i_nlink == 0) | |
1631 | goto out_gunlock; | |
1632 | ||
1633 | error = gfs2_unlink_ok(odip, &odentry->d_name, oip); | |
1634 | if (error) | |
1635 | goto out_gunlock; | |
1636 | error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip); | |
1637 | if (error) | |
1638 | goto out_gunlock; | |
1639 | ||
1640 | if (S_ISDIR(old_mode)) { | |
1641 | error = gfs2_permission(odentry->d_inode, MAY_WRITE); | |
1642 | if (error) | |
1643 | goto out_gunlock; | |
1644 | } | |
1645 | if (S_ISDIR(new_mode)) { | |
1646 | error = gfs2_permission(ndentry->d_inode, MAY_WRITE); | |
1647 | if (error) | |
1648 | goto out_gunlock; | |
1649 | } | |
1650 | error = gfs2_trans_begin(sdp, 4 * RES_DINODE + 4 * RES_LEAF, 0); | |
1651 | if (error) | |
1652 | goto out_gunlock; | |
1653 | ||
1654 | error = update_moved_ino(oip, ndip, S_ISDIR(old_mode)); | |
1655 | if (error) | |
1656 | goto out_end_trans; | |
1657 | ||
1658 | error = update_moved_ino(nip, odip, S_ISDIR(new_mode)); | |
1659 | if (error) | |
1660 | goto out_end_trans; | |
1661 | ||
1662 | error = gfs2_dir_mvino(ndip, &ndentry->d_name, oip, | |
1663 | IF2DT(old_mode)); | |
1664 | if (error) | |
1665 | goto out_end_trans; | |
1666 | ||
1667 | error = gfs2_dir_mvino(odip, &odentry->d_name, nip, | |
1668 | IF2DT(new_mode)); | |
1669 | if (error) | |
1670 | goto out_end_trans; | |
1671 | ||
1672 | if (odip != ndip) { | |
1673 | if (S_ISDIR(new_mode) && !S_ISDIR(old_mode)) { | |
1674 | inc_nlink(&odip->i_inode); | |
1675 | drop_nlink(&ndip->i_inode); | |
1676 | } else if (S_ISDIR(old_mode) && !S_ISDIR(new_mode)) { | |
1677 | inc_nlink(&ndip->i_inode); | |
1678 | drop_nlink(&odip->i_inode); | |
1679 | } | |
1680 | } | |
1681 | mark_inode_dirty(&ndip->i_inode); | |
1682 | if (odip != ndip) | |
1683 | mark_inode_dirty(&odip->i_inode); | |
1684 | ||
1685 | out_end_trans: | |
1686 | gfs2_trans_end(sdp); | |
1687 | out_gunlock: | |
1688 | while (x--) { | |
1689 | gfs2_glock_dq(ghs + x); | |
1690 | gfs2_holder_uninit(ghs + x); | |
1691 | } | |
1692 | out_gunlock_r: | |
1693 | if (r_gh.gh_gl) | |
1694 | gfs2_glock_dq_uninit(&r_gh); | |
1695 | out: | |
1696 | return error; | |
1697 | } | |
1698 | ||
1699 | static int gfs2_rename2(struct inode *odir, struct dentry *odentry, | |
1700 | struct inode *ndir, struct dentry *ndentry, | |
1701 | unsigned int flags) | |
1702 | { | |
1703 | flags &= ~RENAME_NOREPLACE; | |
1704 | ||
1705 | if (flags & ~RENAME_EXCHANGE) | |
1706 | return -EINVAL; | |
1707 | ||
1708 | if (flags & RENAME_EXCHANGE) | |
1709 | return gfs2_exchange(odir, odentry, ndir, ndentry, flags); | |
1710 | ||
1711 | return gfs2_rename(odir, odentry, ndir, ndentry); | |
1712 | } | |
1713 | ||
536baf02 | 1714 | /** |
c177c2ac AV |
1715 | * gfs2_follow_link - Follow a symbolic link |
1716 | * @dentry: The dentry of the link | |
1717 | * @nd: Data that we pass to vfs_follow_link() | |
536baf02 | 1718 | * |
c177c2ac | 1719 | * This can handle symlinks of any size. |
536baf02 | 1720 | * |
c177c2ac | 1721 | * Returns: 0 on success or error code |
536baf02 SW |
1722 | */ |
1723 | ||
6e77137b | 1724 | static const char *gfs2_follow_link(struct dentry *dentry, void **cookie) |
536baf02 | 1725 | { |
2b0143b5 | 1726 | struct gfs2_inode *ip = GFS2_I(d_inode(dentry)); |
536baf02 SW |
1727 | struct gfs2_holder i_gh; |
1728 | struct buffer_head *dibh; | |
160b4026 | 1729 | unsigned int size; |
c177c2ac | 1730 | char *buf; |
536baf02 SW |
1731 | int error; |
1732 | ||
1733 | gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh); | |
1734 | error = gfs2_glock_nq(&i_gh); | |
1735 | if (error) { | |
1736 | gfs2_holder_uninit(&i_gh); | |
680baacb | 1737 | return ERR_PTR(error); |
536baf02 SW |
1738 | } |
1739 | ||
a2e0f799 SW |
1740 | size = (unsigned int)i_size_read(&ip->i_inode); |
1741 | if (size == 0) { | |
536baf02 | 1742 | gfs2_consist_inode(ip); |
c177c2ac | 1743 | buf = ERR_PTR(-EIO); |
536baf02 SW |
1744 | goto out; |
1745 | } | |
1746 | ||
1747 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
c177c2ac AV |
1748 | if (error) { |
1749 | buf = ERR_PTR(error); | |
536baf02 | 1750 | goto out; |
536baf02 SW |
1751 | } |
1752 | ||
160b4026 | 1753 | buf = kzalloc(size + 1, GFP_NOFS); |
c177c2ac AV |
1754 | if (!buf) |
1755 | buf = ERR_PTR(-ENOMEM); | |
1756 | else | |
160b4026 | 1757 | memcpy(buf, dibh->b_data + sizeof(struct gfs2_dinode), size); |
536baf02 SW |
1758 | brelse(dibh); |
1759 | out: | |
1760 | gfs2_glock_dq_uninit(&i_gh); | |
680baacb AV |
1761 | if (!IS_ERR(buf)) |
1762 | *cookie = buf; | |
1763 | return buf; | |
b3b94faa DT |
1764 | } |
1765 | ||
b3b94faa DT |
1766 | /** |
1767 | * gfs2_permission - | |
75d5cfbe SW |
1768 | * @inode: The inode |
1769 | * @mask: The mask to be tested | |
1770 | * @flags: Indicates whether this is an RCU path walk or not | |
b3b94faa | 1771 | * |
300c7d75 SW |
1772 | * This may be called from the VFS directly, or from within GFS2 with the |
1773 | * inode locked, so we look to see if the glock is already locked and only | |
1774 | * lock the glock if its not already been done. | |
1775 | * | |
b3b94faa DT |
1776 | * Returns: errno |
1777 | */ | |
1778 | ||
10556cb2 | 1779 | int gfs2_permission(struct inode *inode, int mask) |
b3b94faa | 1780 | { |
b74c79e9 | 1781 | struct gfs2_inode *ip; |
b3b94faa DT |
1782 | struct gfs2_holder i_gh; |
1783 | int error; | |
300c7d75 | 1784 | int unlock = 0; |
b3b94faa | 1785 | |
b74c79e9 NP |
1786 | |
1787 | ip = GFS2_I(inode); | |
7afd88d9 | 1788 | if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) { |
2e60d768 BM |
1789 | if (mask & MAY_NOT_BLOCK) |
1790 | return -ECHILD; | |
1791 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh); | |
1792 | if (error) | |
1793 | return error; | |
1794 | unlock = 1; | |
300c7d75 | 1795 | } |
b3b94faa | 1796 | |
f58ba889 MS |
1797 | if ((mask & MAY_WRITE) && IS_IMMUTABLE(inode)) |
1798 | error = -EACCES; | |
1799 | else | |
2830ba7f | 1800 | error = generic_permission(inode, mask); |
300c7d75 | 1801 | if (unlock) |
b3b94faa | 1802 | gfs2_glock_dq_uninit(&i_gh); |
b3b94faa DT |
1803 | |
1804 | return error; | |
1805 | } | |
1806 | ||
ab9bbda0 | 1807 | static int __gfs2_setattr_simple(struct inode *inode, struct iattr *attr) |
194c011f | 1808 | { |
194c011f SW |
1809 | setattr_copy(inode, attr); |
1810 | mark_inode_dirty(inode); | |
194c011f SW |
1811 | return 0; |
1812 | } | |
1813 | ||
1814 | /** | |
1815 | * gfs2_setattr_simple - | |
1816 | * @ip: | |
1817 | * @attr: | |
1818 | * | |
1819 | * Returns: errno | |
1820 | */ | |
1821 | ||
ab9bbda0 | 1822 | int gfs2_setattr_simple(struct inode *inode, struct iattr *attr) |
194c011f SW |
1823 | { |
1824 | int error; | |
1825 | ||
1826 | if (current->journal_info) | |
ab9bbda0 | 1827 | return __gfs2_setattr_simple(inode, attr); |
194c011f | 1828 | |
ab9bbda0 | 1829 | error = gfs2_trans_begin(GFS2_SB(inode), RES_DINODE, 0); |
194c011f SW |
1830 | if (error) |
1831 | return error; | |
1832 | ||
ab9bbda0 SW |
1833 | error = __gfs2_setattr_simple(inode, attr); |
1834 | gfs2_trans_end(GFS2_SB(inode)); | |
194c011f SW |
1835 | return error; |
1836 | } | |
1837 | ||
b3b94faa DT |
1838 | static int setattr_chown(struct inode *inode, struct iattr *attr) |
1839 | { | |
feaa7bba SW |
1840 | struct gfs2_inode *ip = GFS2_I(inode); |
1841 | struct gfs2_sbd *sdp = GFS2_SB(inode); | |
7c06b5d6 EB |
1842 | kuid_t ouid, nuid; |
1843 | kgid_t ogid, ngid; | |
b3b94faa | 1844 | int error; |
b8fbf471 | 1845 | struct gfs2_alloc_parms ap; |
b3b94faa | 1846 | |
2933f925 SW |
1847 | ouid = inode->i_uid; |
1848 | ogid = inode->i_gid; | |
b3b94faa DT |
1849 | nuid = attr->ia_uid; |
1850 | ngid = attr->ia_gid; | |
1851 | ||
6b24c0d2 | 1852 | if (!(attr->ia_valid & ATTR_UID) || uid_eq(ouid, nuid)) |
f4108a60 | 1853 | ouid = nuid = NO_UID_QUOTA_CHANGE; |
6b24c0d2 | 1854 | if (!(attr->ia_valid & ATTR_GID) || gid_eq(ogid, ngid)) |
f4108a60 | 1855 | ogid = ngid = NO_GID_QUOTA_CHANGE; |
b3b94faa | 1856 | |
62e96cf8 | 1857 | error = get_write_access(inode); |
b3b94faa | 1858 | if (error) |
5407e242 | 1859 | return error; |
b3b94faa | 1860 | |
62e96cf8 BP |
1861 | error = gfs2_rs_alloc(ip); |
1862 | if (error) | |
1863 | goto out; | |
1864 | ||
1865 | error = gfs2_rindex_update(sdp); | |
1866 | if (error) | |
1867 | goto out; | |
1868 | ||
1869 | error = gfs2_quota_lock(ip, nuid, ngid); | |
1870 | if (error) | |
1871 | goto out; | |
1872 | ||
b8fbf471 AD |
1873 | ap.target = gfs2_get_inode_blocks(&ip->i_inode); |
1874 | ||
6b24c0d2 EB |
1875 | if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) || |
1876 | !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) { | |
b8fbf471 | 1877 | error = gfs2_quota_check(ip, nuid, ngid, &ap); |
b3b94faa DT |
1878 | if (error) |
1879 | goto out_gunlock_q; | |
1880 | } | |
1881 | ||
1882 | error = gfs2_trans_begin(sdp, RES_DINODE + 2 * RES_QUOTA, 0); | |
1883 | if (error) | |
1884 | goto out_gunlock_q; | |
1885 | ||
ab9bbda0 | 1886 | error = gfs2_setattr_simple(inode, attr); |
b3b94faa DT |
1887 | if (error) |
1888 | goto out_end_trans; | |
1889 | ||
6b24c0d2 EB |
1890 | if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) || |
1891 | !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) { | |
39a72580 | 1892 | gfs2_quota_change(ip, -(s64)ap.target, ouid, ogid); |
b8fbf471 | 1893 | gfs2_quota_change(ip, ap.target, nuid, ngid); |
b3b94faa DT |
1894 | } |
1895 | ||
a91ea69f | 1896 | out_end_trans: |
b3b94faa | 1897 | gfs2_trans_end(sdp); |
a91ea69f | 1898 | out_gunlock_q: |
b3b94faa | 1899 | gfs2_quota_unlock(ip); |
62e96cf8 BP |
1900 | out: |
1901 | put_write_access(inode); | |
b3b94faa DT |
1902 | return error; |
1903 | } | |
1904 | ||
1905 | /** | |
1906 | * gfs2_setattr - Change attributes on an inode | |
1907 | * @dentry: The dentry which is changing | |
1908 | * @attr: The structure describing the change | |
1909 | * | |
1910 | * The VFS layer wants to change one or more of an inodes attributes. Write | |
1911 | * that change out to disk. | |
1912 | * | |
1913 | * Returns: errno | |
1914 | */ | |
1915 | ||
1916 | static int gfs2_setattr(struct dentry *dentry, struct iattr *attr) | |
1917 | { | |
2b0143b5 | 1918 | struct inode *inode = d_inode(dentry); |
feaa7bba | 1919 | struct gfs2_inode *ip = GFS2_I(inode); |
b3b94faa DT |
1920 | struct gfs2_holder i_gh; |
1921 | int error; | |
1922 | ||
0a305e49 BP |
1923 | error = gfs2_rs_alloc(ip); |
1924 | if (error) | |
1925 | return error; | |
1926 | ||
b3b94faa DT |
1927 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); |
1928 | if (error) | |
1929 | return error; | |
1930 | ||
1931 | error = -EPERM; | |
1932 | if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) | |
1933 | goto out; | |
1934 | ||
1935 | error = inode_change_ok(inode, attr); | |
1936 | if (error) | |
1937 | goto out; | |
1938 | ||
1939 | if (attr->ia_valid & ATTR_SIZE) | |
ff8f33c8 | 1940 | error = gfs2_setattr_size(inode, attr->ia_size); |
b3b94faa DT |
1941 | else if (attr->ia_valid & (ATTR_UID | ATTR_GID)) |
1942 | error = setattr_chown(inode, attr); | |
e01580bf | 1943 | else { |
ab9bbda0 | 1944 | error = gfs2_setattr_simple(inode, attr); |
e01580bf CH |
1945 | if (!error && attr->ia_valid & ATTR_MODE) |
1946 | error = posix_acl_chmod(inode, inode->i_mode); | |
1947 | } | |
b3b94faa | 1948 | |
a91ea69f | 1949 | out: |
b3b94faa DT |
1950 | if (!error) |
1951 | mark_inode_dirty(inode); | |
ab9bbda0 | 1952 | gfs2_glock_dq_uninit(&i_gh); |
b3b94faa DT |
1953 | return error; |
1954 | } | |
1955 | ||
1956 | /** | |
1957 | * gfs2_getattr - Read out an inode's attributes | |
26c1a574 | 1958 | * @mnt: The vfsmount the inode is being accessed from |
b3b94faa DT |
1959 | * @dentry: The dentry to stat |
1960 | * @stat: The inode's stats | |
1961 | * | |
dcf3dd85 SW |
1962 | * This may be called from the VFS directly, or from within GFS2 with the |
1963 | * inode locked, so we look to see if the glock is already locked and only | |
1964 | * lock the glock if its not already been done. Note that its the NFS | |
1965 | * readdirplus operation which causes this to be called (from filldir) | |
1966 | * with the glock already held. | |
1967 | * | |
b3b94faa DT |
1968 | * Returns: errno |
1969 | */ | |
1970 | ||
1971 | static int gfs2_getattr(struct vfsmount *mnt, struct dentry *dentry, | |
1972 | struct kstat *stat) | |
1973 | { | |
2b0143b5 | 1974 | struct inode *inode = d_inode(dentry); |
feaa7bba | 1975 | struct gfs2_inode *ip = GFS2_I(inode); |
b3b94faa DT |
1976 | struct gfs2_holder gh; |
1977 | int error; | |
dcf3dd85 | 1978 | int unlock = 0; |
b3b94faa | 1979 | |
7afd88d9 | 1980 | if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) { |
2e60d768 BM |
1981 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); |
1982 | if (error) | |
1983 | return error; | |
1984 | unlock = 1; | |
b3b94faa DT |
1985 | } |
1986 | ||
dcf3dd85 | 1987 | generic_fillattr(inode, stat); |
d7c103d0 | 1988 | if (unlock) |
dcf3dd85 SW |
1989 | gfs2_glock_dq_uninit(&gh); |
1990 | ||
1991 | return 0; | |
b3b94faa DT |
1992 | } |
1993 | ||
1994 | static int gfs2_setxattr(struct dentry *dentry, const char *name, | |
1995 | const void *data, size_t size, int flags) | |
1996 | { | |
2b0143b5 | 1997 | struct inode *inode = d_inode(dentry); |
40b78a32 SW |
1998 | struct gfs2_inode *ip = GFS2_I(inode); |
1999 | struct gfs2_holder gh; | |
2000 | int ret; | |
b3b94faa | 2001 | |
40b78a32 SW |
2002 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); |
2003 | ret = gfs2_glock_nq(&gh); | |
2004 | if (ret == 0) { | |
645b2ccc SW |
2005 | ret = gfs2_rs_alloc(ip); |
2006 | if (ret == 0) | |
2007 | ret = generic_setxattr(dentry, name, data, size, flags); | |
40b78a32 SW |
2008 | gfs2_glock_dq(&gh); |
2009 | } | |
2010 | gfs2_holder_uninit(&gh); | |
2011 | return ret; | |
b3b94faa DT |
2012 | } |
2013 | ||
2014 | static ssize_t gfs2_getxattr(struct dentry *dentry, const char *name, | |
2015 | void *data, size_t size) | |
2016 | { | |
2b0143b5 | 2017 | struct inode *inode = d_inode(dentry); |
40b78a32 SW |
2018 | struct gfs2_inode *ip = GFS2_I(inode); |
2019 | struct gfs2_holder gh; | |
2020 | int ret; | |
b3b94faa | 2021 | |
7bd9ee58 SW |
2022 | /* For selinux during lookup */ |
2023 | if (gfs2_glock_is_locked_by_me(ip->i_gl)) | |
2024 | return generic_getxattr(dentry, name, data, size); | |
2025 | ||
40b78a32 SW |
2026 | gfs2_holder_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); |
2027 | ret = gfs2_glock_nq(&gh); | |
2028 | if (ret == 0) { | |
2029 | ret = generic_getxattr(dentry, name, data, size); | |
2030 | gfs2_glock_dq(&gh); | |
2031 | } | |
2032 | gfs2_holder_uninit(&gh); | |
2033 | return ret; | |
b3b94faa DT |
2034 | } |
2035 | ||
2036 | static int gfs2_removexattr(struct dentry *dentry, const char *name) | |
2037 | { | |
2b0143b5 | 2038 | struct inode *inode = d_inode(dentry); |
40b78a32 SW |
2039 | struct gfs2_inode *ip = GFS2_I(inode); |
2040 | struct gfs2_holder gh; | |
2041 | int ret; | |
b3b94faa | 2042 | |
40b78a32 SW |
2043 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); |
2044 | ret = gfs2_glock_nq(&gh); | |
2045 | if (ret == 0) { | |
645b2ccc SW |
2046 | ret = gfs2_rs_alloc(ip); |
2047 | if (ret == 0) | |
2048 | ret = generic_removexattr(dentry, name); | |
40b78a32 SW |
2049 | gfs2_glock_dq(&gh); |
2050 | } | |
2051 | gfs2_holder_uninit(&gh); | |
2052 | return ret; | |
b3b94faa DT |
2053 | } |
2054 | ||
e9079cce SW |
2055 | static int gfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, |
2056 | u64 start, u64 len) | |
2057 | { | |
2058 | struct gfs2_inode *ip = GFS2_I(inode); | |
2059 | struct gfs2_holder gh; | |
2060 | int ret; | |
2061 | ||
2062 | ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC); | |
2063 | if (ret) | |
2064 | return ret; | |
2065 | ||
2066 | mutex_lock(&inode->i_mutex); | |
2067 | ||
2068 | ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh); | |
2069 | if (ret) | |
2070 | goto out; | |
2071 | ||
2072 | if (gfs2_is_stuffed(ip)) { | |
2073 | u64 phys = ip->i_no_addr << inode->i_blkbits; | |
2074 | u64 size = i_size_read(inode); | |
2075 | u32 flags = FIEMAP_EXTENT_LAST|FIEMAP_EXTENT_NOT_ALIGNED| | |
2076 | FIEMAP_EXTENT_DATA_INLINE; | |
2077 | phys += sizeof(struct gfs2_dinode); | |
2078 | phys += start; | |
2079 | if (start + len > size) | |
2080 | len = size - start; | |
2081 | if (start < size) | |
2082 | ret = fiemap_fill_next_extent(fieinfo, start, phys, | |
2083 | len, flags); | |
2084 | if (ret == 1) | |
2085 | ret = 0; | |
2086 | } else { | |
2087 | ret = __generic_block_fiemap(inode, fieinfo, start, len, | |
2088 | gfs2_block_map); | |
2089 | } | |
2090 | ||
2091 | gfs2_glock_dq_uninit(&gh); | |
2092 | out: | |
2093 | mutex_unlock(&inode->i_mutex); | |
2094 | return ret; | |
2095 | } | |
2096 | ||
92e1d5be | 2097 | const struct inode_operations gfs2_file_iops = { |
e6305c43 | 2098 | .permission = gfs2_permission, |
b3b94faa DT |
2099 | .setattr = gfs2_setattr, |
2100 | .getattr = gfs2_getattr, | |
2101 | .setxattr = gfs2_setxattr, | |
2102 | .getxattr = gfs2_getxattr, | |
2103 | .listxattr = gfs2_listxattr, | |
2104 | .removexattr = gfs2_removexattr, | |
e9079cce | 2105 | .fiemap = gfs2_fiemap, |
4e34e719 | 2106 | .get_acl = gfs2_get_acl, |
e01580bf | 2107 | .set_acl = gfs2_set_acl, |
b3b94faa DT |
2108 | }; |
2109 | ||
92e1d5be | 2110 | const struct inode_operations gfs2_dir_iops = { |
b3b94faa DT |
2111 | .create = gfs2_create, |
2112 | .lookup = gfs2_lookup, | |
2113 | .link = gfs2_link, | |
2114 | .unlink = gfs2_unlink, | |
2115 | .symlink = gfs2_symlink, | |
2116 | .mkdir = gfs2_mkdir, | |
855d23ce | 2117 | .rmdir = gfs2_unlink, |
b3b94faa | 2118 | .mknod = gfs2_mknod, |
a63b7bbc | 2119 | .rename2 = gfs2_rename2, |
e6305c43 | 2120 | .permission = gfs2_permission, |
b3b94faa DT |
2121 | .setattr = gfs2_setattr, |
2122 | .getattr = gfs2_getattr, | |
2123 | .setxattr = gfs2_setxattr, | |
2124 | .getxattr = gfs2_getxattr, | |
2125 | .listxattr = gfs2_listxattr, | |
2126 | .removexattr = gfs2_removexattr, | |
e9079cce | 2127 | .fiemap = gfs2_fiemap, |
4e34e719 | 2128 | .get_acl = gfs2_get_acl, |
e01580bf | 2129 | .set_acl = gfs2_set_acl, |
6d4ade98 | 2130 | .atomic_open = gfs2_atomic_open, |
b3b94faa DT |
2131 | }; |
2132 | ||
92e1d5be | 2133 | const struct inode_operations gfs2_symlink_iops = { |
c177c2ac | 2134 | .readlink = generic_readlink, |
b3b94faa | 2135 | .follow_link = gfs2_follow_link, |
87dc800b | 2136 | .put_link = kfree_put_link, |
e6305c43 | 2137 | .permission = gfs2_permission, |
b3b94faa DT |
2138 | .setattr = gfs2_setattr, |
2139 | .getattr = gfs2_getattr, | |
2140 | .setxattr = gfs2_setxattr, | |
2141 | .getxattr = gfs2_getxattr, | |
2142 | .listxattr = gfs2_listxattr, | |
2143 | .removexattr = gfs2_removexattr, | |
e9079cce | 2144 | .fiemap = gfs2_fiemap, |
b3b94faa DT |
2145 | }; |
2146 |