Commit | Line | Data |
---|---|---|
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 | ||
ff34245d | 40 | struct inode *gfs2_ilookup(struct super_block *sb, u64 no_addr) |
194c011f | 41 | { |
ff34245d | 42 | return ilookup(sb, (unsigned long)no_addr); |
194c011f SW |
43 | } |
44 | ||
45 | /** | |
46 | * gfs2_set_iop - Sets inode operations | |
47 | * @inode: The inode with correct i_mode filled in | |
48 | * | |
49 | * GFS2 lookup code fills in vfs inode contents based on info obtained | |
50 | * from directory entry inside gfs2_inode_lookup(). | |
51 | */ | |
52 | ||
53 | static void gfs2_set_iop(struct inode *inode) | |
54 | { | |
55 | struct gfs2_sbd *sdp = GFS2_SB(inode); | |
56 | umode_t mode = inode->i_mode; | |
57 | ||
58 | if (S_ISREG(mode)) { | |
59 | inode->i_op = &gfs2_file_iops; | |
60 | if (gfs2_localflocks(sdp)) | |
61 | inode->i_fop = &gfs2_file_fops_nolock; | |
62 | else | |
63 | inode->i_fop = &gfs2_file_fops; | |
64 | } else if (S_ISDIR(mode)) { | |
65 | inode->i_op = &gfs2_dir_iops; | |
66 | if (gfs2_localflocks(sdp)) | |
67 | inode->i_fop = &gfs2_dir_fops_nolock; | |
68 | else | |
69 | inode->i_fop = &gfs2_dir_fops; | |
70 | } else if (S_ISLNK(mode)) { | |
71 | inode->i_op = &gfs2_symlink_iops; | |
72 | } else { | |
73 | inode->i_op = &gfs2_file_iops; | |
74 | init_special_inode(inode, inode->i_mode, inode->i_rdev); | |
75 | } | |
76 | } | |
77 | ||
78 | /** | |
79 | * gfs2_inode_lookup - Lookup an inode | |
80 | * @sb: The super block | |
81 | * @no_addr: The inode number | |
82 | * @type: The type of the inode | |
83 | * non_block: Can we block on inodes that are being freed? | |
84 | * | |
85 | * Returns: A VFS inode, or an error | |
86 | */ | |
87 | ||
88 | struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned int type, | |
89 | u64 no_addr, u64 no_formal_ino, int non_block) | |
90 | { | |
91 | struct inode *inode; | |
92 | struct gfs2_inode *ip; | |
93 | struct gfs2_glock *io_gl = NULL; | |
94 | int error; | |
95 | ||
ff34245d | 96 | inode = iget_locked(sb, (unsigned long)no_addr); |
194c011f | 97 | ip = GFS2_I(inode); |
ff34245d | 98 | ip->i_no_addr = no_addr; |
194c011f SW |
99 | |
100 | if (!inode) | |
ac3beb6a | 101 | return ERR_PTR(-ENOMEM); |
194c011f SW |
102 | |
103 | if (inode->i_state & I_NEW) { | |
104 | struct gfs2_sbd *sdp = GFS2_SB(inode); | |
105 | ip->i_no_formal_ino = no_formal_ino; | |
106 | ||
107 | error = gfs2_glock_get(sdp, no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl); | |
108 | if (unlikely(error)) | |
109 | goto fail; | |
110 | ip->i_gl->gl_object = ip; | |
111 | ||
112 | error = gfs2_glock_get(sdp, no_addr, &gfs2_iopen_glops, CREATE, &io_gl); | |
113 | if (unlikely(error)) | |
114 | goto fail_put; | |
115 | ||
116 | set_bit(GIF_INVALID, &ip->i_flags); | |
117 | error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh); | |
118 | if (unlikely(error)) | |
119 | goto fail_iopen; | |
120 | ||
121 | ip->i_iopen_gh.gh_gl->gl_object = ip; | |
122 | gfs2_glock_put(io_gl); | |
123 | io_gl = NULL; | |
124 | ||
125 | if (type == DT_UNKNOWN) { | |
126 | /* Inode glock must be locked already */ | |
127 | error = gfs2_inode_refresh(GFS2_I(inode)); | |
128 | if (error) | |
129 | goto fail_refresh; | |
130 | } else { | |
131 | inode->i_mode = DT2IF(type); | |
132 | } | |
133 | ||
134 | gfs2_set_iop(inode); | |
135 | unlock_new_inode(inode); | |
136 | } | |
137 | ||
138 | return inode; | |
139 | ||
140 | fail_refresh: | |
a6a4d98b | 141 | ip->i_iopen_gh.gh_flags |= GL_NOCACHE; |
194c011f | 142 | ip->i_iopen_gh.gh_gl->gl_object = NULL; |
86d067a7 BP |
143 | gfs2_glock_dq_wait(&ip->i_iopen_gh); |
144 | gfs2_holder_uninit(&ip->i_iopen_gh); | |
194c011f SW |
145 | fail_iopen: |
146 | if (io_gl) | |
147 | gfs2_glock_put(io_gl); | |
148 | fail_put: | |
149 | ip->i_gl->gl_object = NULL; | |
194c011f SW |
150 | fail: |
151 | iget_failed(inode); | |
152 | return ERR_PTR(error); | |
153 | } | |
154 | ||
155 | struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr, | |
156 | u64 *no_formal_ino, unsigned int blktype) | |
157 | { | |
158 | struct super_block *sb = sdp->sd_vfs; | |
159 | struct gfs2_holder i_gh; | |
160 | struct inode *inode = NULL; | |
161 | int error; | |
162 | ||
163 | /* Must not read in block until block type is verified */ | |
164 | error = gfs2_glock_nq_num(sdp, no_addr, &gfs2_inode_glops, | |
165 | LM_ST_EXCLUSIVE, GL_SKIP, &i_gh); | |
166 | if (error) | |
167 | return ERR_PTR(error); | |
168 | ||
169 | error = gfs2_check_blk_type(sdp, no_addr, blktype); | |
170 | if (error) | |
171 | goto fail; | |
172 | ||
173 | inode = gfs2_inode_lookup(sb, DT_UNKNOWN, no_addr, 0, 1); | |
174 | if (IS_ERR(inode)) | |
175 | goto fail; | |
176 | ||
177 | /* Two extra checks for NFS only */ | |
178 | if (no_formal_ino) { | |
179 | error = -ESTALE; | |
180 | if (GFS2_I(inode)->i_no_formal_ino != *no_formal_ino) | |
181 | goto fail_iput; | |
182 | ||
183 | error = -EIO; | |
184 | if (GFS2_I(inode)->i_diskflags & GFS2_DIF_SYSTEM) | |
185 | goto fail_iput; | |
186 | ||
187 | error = 0; | |
188 | } | |
189 | ||
190 | fail: | |
191 | gfs2_glock_dq_uninit(&i_gh); | |
192 | return error ? ERR_PTR(error) : inode; | |
193 | fail_iput: | |
194 | iput(inode); | |
195 | goto fail; | |
196 | } | |
197 | ||
198 | ||
199 | struct inode *gfs2_lookup_simple(struct inode *dip, const char *name) | |
200 | { | |
201 | struct qstr qstr; | |
202 | struct inode *inode; | |
203 | gfs2_str2qstr(&qstr, name); | |
204 | inode = gfs2_lookupi(dip, &qstr, 1); | |
205 | /* gfs2_lookupi has inconsistent callers: vfs | |
206 | * related routines expect NULL for no entry found, | |
207 | * gfs2_lookup_simple callers expect ENOENT | |
208 | * and do not check for NULL. | |
209 | */ | |
210 | if (inode == NULL) | |
211 | return ERR_PTR(-ENOENT); | |
212 | else | |
213 | return inode; | |
214 | } | |
215 | ||
216 | ||
217 | /** | |
218 | * gfs2_lookupi - Look up a filename in a directory and return its inode | |
219 | * @d_gh: An initialized holder for the directory glock | |
220 | * @name: The name of the inode to look for | |
221 | * @is_root: If 1, ignore the caller's permissions | |
222 | * @i_gh: An uninitialized holder for the new inode glock | |
223 | * | |
224 | * This can be called via the VFS filldir function when NFS is doing | |
225 | * a readdirplus and the inode which its intending to stat isn't | |
226 | * already in cache. In this case we must not take the directory glock | |
227 | * again, since the readdir call will have already taken that lock. | |
228 | * | |
229 | * Returns: errno | |
230 | */ | |
231 | ||
232 | struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name, | |
233 | int is_root) | |
234 | { | |
235 | struct super_block *sb = dir->i_sb; | |
236 | struct gfs2_inode *dip = GFS2_I(dir); | |
237 | struct gfs2_holder d_gh; | |
238 | int error = 0; | |
239 | struct inode *inode = NULL; | |
240 | int unlock = 0; | |
241 | ||
242 | if (!name->len || name->len > GFS2_FNAMESIZE) | |
243 | return ERR_PTR(-ENAMETOOLONG); | |
244 | ||
245 | if ((name->len == 1 && memcmp(name->name, ".", 1) == 0) || | |
246 | (name->len == 2 && memcmp(name->name, "..", 2) == 0 && | |
2b0143b5 | 247 | dir == d_inode(sb->s_root))) { |
194c011f SW |
248 | igrab(dir); |
249 | return dir; | |
250 | } | |
251 | ||
252 | if (gfs2_glock_is_locked_by_me(dip->i_gl) == NULL) { | |
253 | error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh); | |
254 | if (error) | |
255 | return ERR_PTR(error); | |
256 | unlock = 1; | |
257 | } | |
258 | ||
259 | if (!is_root) { | |
10556cb2 | 260 | error = gfs2_permission(dir, MAY_EXEC); |
194c011f SW |
261 | if (error) |
262 | goto out; | |
263 | } | |
264 | ||
5a00f3cc | 265 | inode = gfs2_dir_search(dir, name, false); |
194c011f SW |
266 | if (IS_ERR(inode)) |
267 | error = PTR_ERR(inode); | |
268 | out: | |
269 | if (unlock) | |
270 | gfs2_glock_dq_uninit(&d_gh); | |
271 | if (error == -ENOENT) | |
272 | return NULL; | |
273 | return inode ? inode : ERR_PTR(error); | |
274 | } | |
275 | ||
276 | /** | |
277 | * create_ok - OK to create a new on-disk inode here? | |
278 | * @dip: Directory in which dinode is to be created | |
279 | * @name: Name of new dinode | |
280 | * @mode: | |
281 | * | |
282 | * Returns: errno | |
283 | */ | |
284 | ||
285 | static int create_ok(struct gfs2_inode *dip, const struct qstr *name, | |
175a4eb7 | 286 | umode_t mode) |
194c011f SW |
287 | { |
288 | int error; | |
289 | ||
10556cb2 | 290 | error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC); |
194c011f SW |
291 | if (error) |
292 | return error; | |
293 | ||
294 | /* Don't create entries in an unlinked directory */ | |
295 | if (!dip->i_inode.i_nlink) | |
296 | return -ENOENT; | |
297 | ||
194c011f SW |
298 | if (dip->i_entries == (u32)-1) |
299 | return -EFBIG; | |
300 | if (S_ISDIR(mode) && dip->i_inode.i_nlink == (u32)-1) | |
301 | return -EMLINK; | |
302 | ||
303 | return 0; | |
304 | } | |
305 | ||
c9aecf73 SW |
306 | static void munge_mode_uid_gid(const struct gfs2_inode *dip, |
307 | struct inode *inode) | |
194c011f SW |
308 | { |
309 | if (GFS2_SB(&dip->i_inode)->sd_args.ar_suiddir && | |
6b24c0d2 EB |
310 | (dip->i_inode.i_mode & S_ISUID) && |
311 | !uid_eq(dip->i_inode.i_uid, GLOBAL_ROOT_UID)) { | |
c9aecf73 SW |
312 | if (S_ISDIR(inode->i_mode)) |
313 | inode->i_mode |= S_ISUID; | |
6b24c0d2 | 314 | else if (!uid_eq(dip->i_inode.i_uid, current_fsuid())) |
c9aecf73 SW |
315 | inode->i_mode &= ~07111; |
316 | inode->i_uid = dip->i_inode.i_uid; | |
194c011f | 317 | } else |
c9aecf73 | 318 | inode->i_uid = current_fsuid(); |
194c011f SW |
319 | |
320 | if (dip->i_inode.i_mode & S_ISGID) { | |
c9aecf73 SW |
321 | if (S_ISDIR(inode->i_mode)) |
322 | inode->i_mode |= S_ISGID; | |
323 | inode->i_gid = dip->i_inode.i_gid; | |
194c011f | 324 | } else |
c9aecf73 | 325 | inode->i_gid = current_fsgid(); |
194c011f SW |
326 | } |
327 | ||
b2c8b3ea | 328 | static int alloc_dinode(struct gfs2_inode *ip, u32 flags, unsigned *dblocks) |
194c011f | 329 | { |
c9aecf73 | 330 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
b2c8b3ea | 331 | struct gfs2_alloc_parms ap = { .target = *dblocks, .aflags = flags, }; |
194c011f SW |
332 | int error; |
333 | ||
b8fbf471 | 334 | error = gfs2_quota_lock_check(ip, &ap); |
194c011f SW |
335 | if (error) |
336 | goto out; | |
337 | ||
7b9cff46 | 338 | error = gfs2_inplace_reserve(ip, &ap); |
fd4b4e04 SW |
339 | if (error) |
340 | goto out_quota; | |
341 | ||
b2c8b3ea | 342 | error = gfs2_trans_begin(sdp, (*dblocks * RES_RG_BIT) + RES_STATFS + RES_QUOTA, 0); |
194c011f SW |
343 | if (error) |
344 | goto out_ipreserv; | |
345 | ||
b2c8b3ea | 346 | error = gfs2_alloc_blocks(ip, &ip->i_no_addr, dblocks, 1, &ip->i_generation); |
c9aecf73 SW |
347 | ip->i_no_formal_ino = ip->i_generation; |
348 | ip->i_inode.i_ino = ip->i_no_addr; | |
349 | ip->i_goal = ip->i_no_addr; | |
194c011f SW |
350 | |
351 | gfs2_trans_end(sdp); | |
352 | ||
353 | out_ipreserv: | |
c9aecf73 | 354 | gfs2_inplace_release(ip); |
fd4b4e04 SW |
355 | out_quota: |
356 | gfs2_quota_unlock(ip); | |
194c011f | 357 | out: |
194c011f SW |
358 | return error; |
359 | } | |
360 | ||
f2741d98 SW |
361 | static void gfs2_init_dir(struct buffer_head *dibh, |
362 | const struct gfs2_inode *parent) | |
e2d0a13b SW |
363 | { |
364 | struct gfs2_dinode *di = (struct gfs2_dinode *)dibh->b_data; | |
365 | struct gfs2_dirent *dent = (struct gfs2_dirent *)(di+1); | |
366 | ||
367 | gfs2_qstr2dirent(&gfs2_qdot, GFS2_DIRENT_SIZE(gfs2_qdot.len), dent); | |
368 | dent->de_inum = di->di_num; /* already GFS2 endian */ | |
369 | dent->de_type = cpu_to_be16(DT_DIR); | |
370 | ||
371 | dent = (struct gfs2_dirent *)((char*)dent + GFS2_DIRENT_SIZE(1)); | |
372 | gfs2_qstr2dirent(&gfs2_qdotdot, dibh->b_size - GFS2_DIRENT_SIZE(1) - sizeof(struct gfs2_dinode), dent); | |
373 | gfs2_inum_out(parent, dent); | |
374 | dent->de_type = cpu_to_be16(DT_DIR); | |
375 | ||
376 | } | |
377 | ||
b2c8b3ea SW |
378 | /** |
379 | * gfs2_init_xattr - Initialise an xattr block for a new inode | |
380 | * @ip: The inode in question | |
381 | * | |
382 | * This sets up an empty xattr block for a new inode, ready to | |
383 | * take any ACLs, LSM xattrs, etc. | |
384 | */ | |
385 | ||
386 | static void gfs2_init_xattr(struct gfs2_inode *ip) | |
387 | { | |
388 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); | |
389 | struct buffer_head *bh; | |
390 | struct gfs2_ea_header *ea; | |
391 | ||
392 | bh = gfs2_meta_new(ip->i_gl, ip->i_eattr); | |
393 | gfs2_trans_add_meta(ip->i_gl, bh); | |
394 | gfs2_metatype_set(bh, GFS2_METATYPE_EA, GFS2_FORMAT_EA); | |
395 | gfs2_buffer_clear_tail(bh, sizeof(struct gfs2_meta_header)); | |
396 | ||
397 | ea = GFS2_EA_BH2FIRST(bh); | |
398 | ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize); | |
399 | ea->ea_type = GFS2_EATYPE_UNUSED; | |
400 | ea->ea_flags = GFS2_EAFLAG_LAST; | |
401 | ||
402 | brelse(bh); | |
403 | } | |
404 | ||
194c011f SW |
405 | /** |
406 | * init_dinode - Fill in a new dinode structure | |
f2741d98 | 407 | * @dip: The directory this inode is being created in |
c9aecf73 | 408 | * @ip: The inode |
f2741d98 | 409 | * @symname: The symlink destination (if a symlink) |
f2741d98 | 410 | * @bhp: The buffer head (returned to caller) |
194c011f SW |
411 | * |
412 | */ | |
413 | ||
c9aecf73 | 414 | static void init_dinode(struct gfs2_inode *dip, struct gfs2_inode *ip, |
79ba7480 | 415 | const char *symname) |
194c011f | 416 | { |
194c011f SW |
417 | struct gfs2_dinode *di; |
418 | struct buffer_head *dibh; | |
194c011f | 419 | |
c9aecf73 | 420 | dibh = gfs2_meta_new(ip->i_gl, ip->i_no_addr); |
350a9b0a | 421 | gfs2_trans_add_meta(ip->i_gl, dibh); |
194c011f | 422 | di = (struct gfs2_dinode *)dibh->b_data; |
79ba7480 | 423 | gfs2_dinode_out(ip, di); |
194c011f | 424 | |
c9aecf73 SW |
425 | di->di_major = cpu_to_be32(MAJOR(ip->i_inode.i_rdev)); |
426 | di->di_minor = cpu_to_be32(MINOR(ip->i_inode.i_rdev)); | |
194c011f | 427 | di->__pad1 = 0; |
194c011f SW |
428 | di->__pad2 = 0; |
429 | di->__pad3 = 0; | |
194c011f | 430 | memset(&di->__pad4, 0, sizeof(di->__pad4)); |
194c011f | 431 | memset(&di->di_reserved, 0, sizeof(di->di_reserved)); |
79ba7480 | 432 | gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode)); |
160b4026 | 433 | |
c9aecf73 | 434 | switch(ip->i_inode.i_mode & S_IFMT) { |
160b4026 | 435 | case S_IFDIR: |
e2d0a13b | 436 | gfs2_init_dir(dibh, dip); |
160b4026 SW |
437 | break; |
438 | case S_IFLNK: | |
c9aecf73 | 439 | memcpy(dibh->b_data + sizeof(struct gfs2_dinode), symname, ip->i_inode.i_size); |
160b4026 | 440 | break; |
e2d0a13b SW |
441 | } |
442 | ||
194c011f | 443 | set_buffer_uptodate(dibh); |
79ba7480 | 444 | brelse(dibh); |
194c011f SW |
445 | } |
446 | ||
534cf9ca SW |
447 | /** |
448 | * gfs2_trans_da_blocks - Calculate number of blocks to link inode | |
449 | * @dip: The directory we are linking into | |
450 | * @da: The dir add information | |
451 | * @nr_inodes: The number of inodes involved | |
452 | * | |
453 | * This calculate the number of blocks we need to reserve in a | |
454 | * transaction to link @nr_inodes into a directory. In most cases | |
455 | * @nr_inodes will be 2 (the directory plus the inode being linked in) | |
456 | * but in case of rename, 4 may be required. | |
457 | * | |
458 | * Returns: Number of blocks | |
459 | */ | |
460 | ||
461 | static unsigned gfs2_trans_da_blks(const struct gfs2_inode *dip, | |
462 | const struct gfs2_diradd *da, | |
463 | unsigned nr_inodes) | |
464 | { | |
465 | return da->nr_blocks + gfs2_rg_blocks(dip, da->nr_blocks) + | |
466 | (nr_inodes * RES_DINODE) + RES_QUOTA + RES_STATFS; | |
467 | } | |
468 | ||
194c011f | 469 | static int link_dinode(struct gfs2_inode *dip, const struct qstr *name, |
3c1c0ae1 | 470 | struct gfs2_inode *ip, struct gfs2_diradd *da) |
194c011f SW |
471 | { |
472 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); | |
3c1c0ae1 | 473 | struct gfs2_alloc_parms ap = { .target = da->nr_blocks, }; |
194c011f SW |
474 | int error; |
475 | ||
3c1c0ae1 | 476 | if (da->nr_blocks) { |
b8fbf471 | 477 | error = gfs2_quota_lock_check(dip, &ap); |
194c011f SW |
478 | if (error) |
479 | goto fail_quota_locks; | |
480 | ||
7b9cff46 | 481 | error = gfs2_inplace_reserve(dip, &ap); |
194c011f SW |
482 | if (error) |
483 | goto fail_quota_locks; | |
484 | ||
534cf9ca | 485 | error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, da, 2), 0); |
194c011f SW |
486 | if (error) |
487 | goto fail_ipreserv; | |
488 | } else { | |
489 | error = gfs2_trans_begin(sdp, RES_LEAF + 2 * RES_DINODE, 0); | |
490 | if (error) | |
491 | goto fail_quota_locks; | |
492 | } | |
493 | ||
2b47dad8 | 494 | error = gfs2_dir_add(&dip->i_inode, name, ip, da); |
194c011f | 495 | |
194c011f | 496 | gfs2_trans_end(sdp); |
194c011f | 497 | fail_ipreserv: |
fd4b4e04 | 498 | gfs2_inplace_release(dip); |
194c011f SW |
499 | fail_quota_locks: |
500 | gfs2_quota_unlock(dip); | |
194c011f SW |
501 | return error; |
502 | } | |
503 | ||
46cc1e5f | 504 | static int gfs2_initxattrs(struct inode *inode, const struct xattr *xattr_array, |
9d8f13ba | 505 | void *fs_info) |
194c011f | 506 | { |
9d8f13ba MZ |
507 | const struct xattr *xattr; |
508 | int err = 0; | |
509 | ||
510 | for (xattr = xattr_array; xattr->name != NULL; xattr++) { | |
511 | err = __gfs2_xattr_set(inode, xattr->name, xattr->value, | |
512 | xattr->value_len, 0, | |
513 | GFS2_EATYPE_SECURITY); | |
514 | if (err < 0) | |
515 | break; | |
194c011f | 516 | } |
194c011f SW |
517 | return err; |
518 | } | |
b3b94faa | 519 | |
194c011f | 520 | /** |
f2741d98 SW |
521 | * gfs2_create_inode - Create a new inode |
522 | * @dir: The parent directory | |
523 | * @dentry: The new dentry | |
6d4ade98 | 524 | * @file: If non-NULL, the file which is being opened |
f2741d98 SW |
525 | * @mode: The permissions on the new inode |
526 | * @dev: For device nodes, this is the device number | |
527 | * @symname: For symlinks, this is the link destination | |
528 | * @size: The initial size of the inode (ignored for directories) | |
194c011f | 529 | * |
f2741d98 | 530 | * Returns: 0 on success, or error code |
194c011f SW |
531 | */ |
532 | ||
f2741d98 | 533 | static int gfs2_create_inode(struct inode *dir, struct dentry *dentry, |
6d4ade98 | 534 | struct file *file, |
175a4eb7 | 535 | umode_t mode, dev_t dev, const char *symname, |
6d4ade98 | 536 | unsigned int size, int excl, int *opened) |
194c011f | 537 | { |
f2741d98 | 538 | const struct qstr *name = &dentry->d_name; |
e01580bf | 539 | struct posix_acl *default_acl, *acl; |
f2741d98 | 540 | struct gfs2_holder ghs[2]; |
194c011f | 541 | struct inode *inode = NULL; |
8e2e0047 | 542 | struct gfs2_inode *dip = GFS2_I(dir), *ip; |
194c011f | 543 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); |
a4923865 | 544 | struct gfs2_glock *io_gl = NULL; |
783013c0 | 545 | int error, free_vfs_inode = 1; |
9dbe9610 | 546 | u32 aflags = 0; |
b2c8b3ea | 547 | unsigned blocks = 1; |
19aeb5a6 | 548 | struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, }; |
194c011f SW |
549 | |
550 | if (!name->len || name->len > GFS2_FNAMESIZE) | |
f2741d98 | 551 | return -ENAMETOOLONG; |
194c011f | 552 | |
b54e9a0b | 553 | error = gfs2_rsqa_alloc(dip); |
0a305e49 BP |
554 | if (error) |
555 | return error; | |
556 | ||
fd4b4e04 SW |
557 | error = gfs2_rindex_update(sdp); |
558 | if (error) | |
559 | return error; | |
560 | ||
f2741d98 | 561 | error = gfs2_glock_nq_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); |
194c011f SW |
562 | if (error) |
563 | goto fail; | |
564 | ||
565 | error = create_ok(dip, name, mode); | |
5a00f3cc SW |
566 | if (error) |
567 | goto fail_gunlock; | |
568 | ||
569 | inode = gfs2_dir_search(dir, &dentry->d_name, !S_ISREG(mode) || excl); | |
570 | error = PTR_ERR(inode); | |
571 | if (!IS_ERR(inode)) { | |
571a4b57 AV |
572 | if (S_ISDIR(inode->i_mode)) { |
573 | iput(inode); | |
574 | inode = ERR_PTR(-EISDIR); | |
575 | goto fail_gunlock; | |
576 | } | |
44bb31ba | 577 | d_instantiate(dentry, inode); |
6d4ade98 | 578 | error = 0; |
0d0d1107 | 579 | if (file) { |
44bb31ba | 580 | if (S_ISREG(inode->i_mode)) |
5ca1db41 | 581 | error = finish_open(file, dentry, gfs2_open_common, opened); |
44bb31ba AV |
582 | else |
583 | error = finish_no_open(file, NULL); | |
6d4ade98 | 584 | } |
9a63edd1 | 585 | gfs2_glock_dq_uninit(ghs); |
6d4ade98 | 586 | return error; |
5a00f3cc | 587 | } else if (error != -ENOENT) { |
194c011f | 588 | goto fail_gunlock; |
5a00f3cc | 589 | } |
194c011f | 590 | |
3c1c0ae1 | 591 | error = gfs2_diradd_alloc_required(dir, name, &da); |
fd4b4e04 SW |
592 | if (error < 0) |
593 | goto fail_gunlock; | |
594 | ||
c9aecf73 | 595 | inode = new_inode(sdp->sd_vfs); |
fd4b4e04 SW |
596 | error = -ENOMEM; |
597 | if (!inode) | |
598 | goto fail_gunlock; | |
599 | ||
e01580bf CH |
600 | error = posix_acl_create(dir, &mode, &default_acl, &acl); |
601 | if (error) | |
783013c0 | 602 | goto fail_gunlock; |
e01580bf | 603 | |
c9aecf73 | 604 | ip = GFS2_I(inode); |
b54e9a0b | 605 | error = gfs2_rsqa_alloc(ip); |
194c011f | 606 | if (error) |
e01580bf | 607 | goto fail_free_acls; |
c9aecf73 | 608 | |
c9aecf73 | 609 | inode->i_mode = mode; |
79ba7480 | 610 | set_nlink(inode, S_ISDIR(mode) ? 2 : 1); |
c9aecf73 SW |
611 | inode->i_rdev = dev; |
612 | inode->i_size = size; | |
fd4b4e04 | 613 | inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; |
28fb3027 | 614 | gfs2_set_inode_blocks(inode, 1); |
c9aecf73 | 615 | munge_mode_uid_gid(dip, inode); |
00a158be | 616 | check_and_update_goal(dip); |
c9aecf73 | 617 | ip->i_goal = dip->i_goal; |
28fb3027 SW |
618 | ip->i_diskflags = 0; |
619 | ip->i_eattr = 0; | |
620 | ip->i_height = 0; | |
621 | ip->i_depth = 0; | |
622 | ip->i_entries = 0; | |
623 | ||
624 | switch(mode & S_IFMT) { | |
625 | case S_IFREG: | |
626 | if ((dip->i_diskflags & GFS2_DIF_INHERIT_JDATA) || | |
627 | gfs2_tune_get(sdp, gt_new_files_jdata)) | |
628 | ip->i_diskflags |= GFS2_DIF_JDATA; | |
629 | gfs2_set_aops(inode); | |
630 | break; | |
631 | case S_IFDIR: | |
632 | ip->i_diskflags |= (dip->i_diskflags & GFS2_DIF_INHERIT_JDATA); | |
633 | ip->i_diskflags |= GFS2_DIF_JDATA; | |
634 | ip->i_entries = 2; | |
635 | break; | |
636 | } | |
acc546fd AD |
637 | |
638 | /* Force SYSTEM flag on all files and subdirs of a SYSTEM directory */ | |
639 | if (dip->i_diskflags & GFS2_DIF_SYSTEM) | |
640 | ip->i_diskflags |= GFS2_DIF_SYSTEM; | |
641 | ||
28fb3027 | 642 | gfs2_set_inode_flags(inode); |
194c011f | 643 | |
2b0143b5 | 644 | if ((GFS2_I(d_inode(sdp->sd_root_dir)) == dip) || |
9dbe9610 SW |
645 | (dip->i_diskflags & GFS2_DIF_TOPDIR)) |
646 | aflags |= GFS2_AF_ORLOV; | |
647 | ||
b2c8b3ea SW |
648 | if (default_acl || acl) |
649 | blocks++; | |
650 | ||
651 | error = alloc_dinode(ip, aflags, &blocks); | |
194c011f | 652 | if (error) |
c9aecf73 | 653 | goto fail_free_inode; |
194c011f | 654 | |
b2c8b3ea SW |
655 | gfs2_set_inode_blocks(inode, blocks); |
656 | ||
c9aecf73 | 657 | error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl); |
194c011f | 658 | if (error) |
c9aecf73 | 659 | goto fail_free_inode; |
194c011f | 660 | |
1e2d9d44 | 661 | ip->i_gl->gl_object = ip; |
c9aecf73 SW |
662 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1); |
663 | if (error) | |
664 | goto fail_free_inode; | |
665 | ||
b2c8b3ea | 666 | error = gfs2_trans_begin(sdp, blocks, 0); |
c9aecf73 | 667 | if (error) |
194c011f SW |
668 | goto fail_gunlock2; |
669 | ||
b2c8b3ea SW |
670 | if (blocks > 1) { |
671 | ip->i_eattr = ip->i_no_addr + 1; | |
672 | gfs2_init_xattr(ip); | |
673 | } | |
79ba7480 | 674 | init_dinode(dip, ip, symname); |
fd4b4e04 SW |
675 | gfs2_trans_end(sdp); |
676 | ||
c9aecf73 | 677 | error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_iopen_glops, CREATE, &io_gl); |
194c011f SW |
678 | if (error) |
679 | goto fail_gunlock2; | |
680 | ||
a4923865 BP |
681 | BUG_ON(test_and_set_bit(GLF_INODE_CREATING, &io_gl->gl_flags)); |
682 | ||
c9aecf73 | 683 | error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh); |
ff7f4cb4 SW |
684 | if (error) |
685 | goto fail_gunlock2; | |
0a305e49 | 686 | |
c9aecf73 SW |
687 | ip->i_iopen_gh.gh_gl->gl_object = ip; |
688 | gfs2_glock_put(io_gl); | |
689 | gfs2_set_iop(inode); | |
690 | insert_inode_hash(inode); | |
691 | ||
783013c0 BP |
692 | free_vfs_inode = 0; /* After this point, the inode is no longer |
693 | considered free. Any failures need to undo | |
694 | the gfs2 structures. */ | |
e01580bf CH |
695 | if (default_acl) { |
696 | error = gfs2_set_acl(inode, default_acl, ACL_TYPE_DEFAULT); | |
697 | posix_acl_release(default_acl); | |
698 | } | |
699 | if (acl) { | |
700 | if (!error) | |
701 | error = gfs2_set_acl(inode, acl, ACL_TYPE_ACCESS); | |
702 | posix_acl_release(acl); | |
703 | } | |
704 | ||
194c011f | 705 | if (error) |
c9aecf73 | 706 | goto fail_gunlock3; |
194c011f | 707 | |
f45dc26d BP |
708 | error = security_inode_init_security(&ip->i_inode, &dip->i_inode, name, |
709 | &gfs2_initxattrs, NULL); | |
194c011f | 710 | if (error) |
c9aecf73 | 711 | goto fail_gunlock3; |
194c011f | 712 | |
3c1c0ae1 | 713 | error = link_dinode(dip, name, ip, &da); |
194c011f | 714 | if (error) |
c9aecf73 | 715 | goto fail_gunlock3; |
194c011f | 716 | |
79ba7480 | 717 | mark_inode_dirty(inode); |
6d4ade98 | 718 | d_instantiate(dentry, inode); |
c5bf8fef MS |
719 | if (file) { |
720 | *opened |= FILE_CREATED; | |
6d4ade98 | 721 | error = finish_open(file, dentry, gfs2_open_common, opened); |
c5bf8fef | 722 | } |
28fb3027 SW |
723 | gfs2_glock_dq_uninit(ghs); |
724 | gfs2_glock_dq_uninit(ghs + 1); | |
a4923865 | 725 | clear_bit(GLF_INODE_CREATING, &io_gl->gl_flags); |
6d4ade98 | 726 | return error; |
194c011f | 727 | |
c9aecf73 | 728 | fail_gunlock3: |
783013c0 BP |
729 | gfs2_glock_dq_uninit(&ip->i_iopen_gh); |
730 | gfs2_glock_put(io_gl); | |
194c011f | 731 | fail_gunlock2: |
a4923865 BP |
732 | if (io_gl) |
733 | clear_bit(GLF_INODE_CREATING, &io_gl->gl_flags); | |
194c011f | 734 | gfs2_glock_dq_uninit(ghs + 1); |
c9aecf73 SW |
735 | fail_free_inode: |
736 | if (ip->i_gl) | |
737 | gfs2_glock_put(ip->i_gl); | |
b54e9a0b | 738 | gfs2_rsqa_delete(ip, NULL); |
e01580bf CH |
739 | fail_free_acls: |
740 | if (default_acl) | |
741 | posix_acl_release(default_acl); | |
742 | if (acl) | |
743 | posix_acl_release(acl); | |
194c011f | 744 | fail_gunlock: |
2b47dad8 | 745 | gfs2_dir_no_add(&da); |
f2741d98 | 746 | gfs2_glock_dq_uninit(ghs); |
40ac218f | 747 | if (inode && !IS_ERR(inode)) { |
79ba7480 | 748 | clear_nlink(inode); |
05978803 AD |
749 | if (!free_vfs_inode) |
750 | mark_inode_dirty(inode); | |
751 | set_bit(free_vfs_inode ? GIF_FREE_VFS_INODE : GIF_ALLOC_FAILED, | |
752 | &GFS2_I(inode)->i_flags); | |
40ac218f SW |
753 | iput(inode); |
754 | } | |
194c011f | 755 | fail: |
f2741d98 | 756 | return error; |
194c011f | 757 | } |
f2741d98 | 758 | |
b3b94faa DT |
759 | /** |
760 | * gfs2_create - Create a file | |
761 | * @dir: The directory in which to create the file | |
762 | * @dentry: The dentry of the new file | |
763 | * @mode: The mode of the new file | |
764 | * | |
765 | * Returns: errno | |
766 | */ | |
767 | ||
768 | static int gfs2_create(struct inode *dir, struct dentry *dentry, | |
ebfc3b49 | 769 | umode_t mode, bool excl) |
b3b94faa | 770 | { |
6d4ade98 | 771 | return gfs2_create_inode(dir, dentry, NULL, S_IFREG | mode, 0, NULL, 0, excl, NULL); |
b3b94faa DT |
772 | } |
773 | ||
774 | /** | |
6d4ade98 | 775 | * __gfs2_lookup - Look up a filename in a directory and return its inode |
b3b94faa DT |
776 | * @dir: The directory inode |
777 | * @dentry: The dentry of the new inode | |
6d4ade98 SW |
778 | * @file: File to be opened |
779 | * @opened: atomic_open flags | |
b3b94faa | 780 | * |
b3b94faa DT |
781 | * |
782 | * Returns: errno | |
783 | */ | |
784 | ||
6d4ade98 SW |
785 | static struct dentry *__gfs2_lookup(struct inode *dir, struct dentry *dentry, |
786 | struct file *file, int *opened) | |
b3b94faa | 787 | { |
6d4ade98 SW |
788 | struct inode *inode; |
789 | struct dentry *d; | |
790 | struct gfs2_holder gh; | |
791 | struct gfs2_glock *gl; | |
792 | int error; | |
793 | ||
794 | inode = gfs2_lookupi(dir, &dentry->d_name, 0); | |
7b7a9115 BC |
795 | if (inode == NULL) { |
796 | d_add(dentry, NULL); | |
6d4ade98 | 797 | return NULL; |
7b7a9115 | 798 | } |
6d4ade98 SW |
799 | if (IS_ERR(inode)) |
800 | return ERR_CAST(inode); | |
801 | ||
802 | gl = GFS2_I(inode)->i_gl; | |
803 | error = gfs2_glock_nq_init(gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); | |
804 | if (error) { | |
805 | iput(inode); | |
806 | return ERR_PTR(error); | |
9656b2c1 | 807 | } |
6d4ade98 SW |
808 | |
809 | d = d_splice_alias(inode, dentry); | |
d57b9c9a | 810 | if (IS_ERR(d)) { |
d57b9c9a BF |
811 | gfs2_glock_dq_uninit(&gh); |
812 | return d; | |
813 | } | |
6d4ade98 SW |
814 | if (file && S_ISREG(inode->i_mode)) |
815 | error = finish_open(file, dentry, gfs2_open_common, opened); | |
816 | ||
817 | gfs2_glock_dq_uninit(&gh); | |
5ca1db41 MS |
818 | if (error) { |
819 | dput(d); | |
6d4ade98 | 820 | return ERR_PTR(error); |
5ca1db41 | 821 | } |
6d4ade98 SW |
822 | return d; |
823 | } | |
824 | ||
825 | static struct dentry *gfs2_lookup(struct inode *dir, struct dentry *dentry, | |
826 | unsigned flags) | |
827 | { | |
828 | return __gfs2_lookup(dir, dentry, NULL, NULL); | |
b3b94faa DT |
829 | } |
830 | ||
831 | /** | |
832 | * gfs2_link - Link to a file | |
833 | * @old_dentry: The inode to link | |
834 | * @dir: Add link to this directory | |
835 | * @dentry: The name of the link | |
836 | * | |
837 | * Link the inode in "old_dentry" into the directory "dir" with the | |
838 | * name in "dentry". | |
839 | * | |
840 | * Returns: errno | |
841 | */ | |
842 | ||
843 | static int gfs2_link(struct dentry *old_dentry, struct inode *dir, | |
844 | struct dentry *dentry) | |
845 | { | |
feaa7bba SW |
846 | struct gfs2_inode *dip = GFS2_I(dir); |
847 | struct gfs2_sbd *sdp = GFS2_SB(dir); | |
2b0143b5 | 848 | struct inode *inode = d_inode(old_dentry); |
feaa7bba | 849 | struct gfs2_inode *ip = GFS2_I(inode); |
b3b94faa | 850 | struct gfs2_holder ghs[2]; |
2baee03f | 851 | struct buffer_head *dibh; |
19aeb5a6 | 852 | struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, }; |
b3b94faa DT |
853 | int error; |
854 | ||
b60623c2 | 855 | if (S_ISDIR(inode->i_mode)) |
b3b94faa DT |
856 | return -EPERM; |
857 | ||
b54e9a0b | 858 | error = gfs2_rsqa_alloc(dip); |
0a305e49 BP |
859 | if (error) |
860 | return error; | |
861 | ||
b3b94faa DT |
862 | gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); |
863 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); | |
864 | ||
72dbf479 BP |
865 | error = gfs2_glock_nq(ghs); /* parent */ |
866 | if (error) | |
867 | goto out_parent; | |
868 | ||
869 | error = gfs2_glock_nq(ghs + 1); /* child */ | |
b3b94faa | 870 | if (error) |
72dbf479 | 871 | goto out_child; |
b3b94faa | 872 | |
d192a8e5 SW |
873 | error = -ENOENT; |
874 | if (inode->i_nlink == 0) | |
875 | goto out_gunlock; | |
876 | ||
10556cb2 | 877 | error = gfs2_permission(dir, MAY_WRITE | MAY_EXEC); |
b3b94faa DT |
878 | if (error) |
879 | goto out_gunlock; | |
880 | ||
dbb7cae2 | 881 | error = gfs2_dir_check(dir, &dentry->d_name, NULL); |
b3b94faa DT |
882 | switch (error) { |
883 | case -ENOENT: | |
884 | break; | |
885 | case 0: | |
886 | error = -EEXIST; | |
887 | default: | |
888 | goto out_gunlock; | |
889 | } | |
890 | ||
891 | error = -EINVAL; | |
4f56110a | 892 | if (!dip->i_inode.i_nlink) |
b3b94faa DT |
893 | goto out_gunlock; |
894 | error = -EFBIG; | |
ad6203f2 | 895 | if (dip->i_entries == (u32)-1) |
b3b94faa DT |
896 | goto out_gunlock; |
897 | error = -EPERM; | |
898 | if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) | |
899 | goto out_gunlock; | |
900 | error = -EINVAL; | |
4f56110a | 901 | if (!ip->i_inode.i_nlink) |
b3b94faa DT |
902 | goto out_gunlock; |
903 | error = -EMLINK; | |
4f56110a | 904 | if (ip->i_inode.i_nlink == (u32)-1) |
b3b94faa DT |
905 | goto out_gunlock; |
906 | ||
3c1c0ae1 | 907 | error = gfs2_diradd_alloc_required(dir, &dentry->d_name, &da); |
c752666c | 908 | if (error < 0) |
b3b94faa DT |
909 | goto out_gunlock; |
910 | ||
3c1c0ae1 SW |
911 | if (da.nr_blocks) { |
912 | struct gfs2_alloc_parms ap = { .target = da.nr_blocks, }; | |
b8fbf471 | 913 | error = gfs2_quota_lock_check(dip, &ap); |
b3b94faa | 914 | if (error) |
5407e242 | 915 | goto out_gunlock; |
b3b94faa | 916 | |
7b9cff46 | 917 | error = gfs2_inplace_reserve(dip, &ap); |
b3b94faa DT |
918 | if (error) |
919 | goto out_gunlock_q; | |
920 | ||
534cf9ca | 921 | error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, &da, 2), 0); |
b3b94faa DT |
922 | if (error) |
923 | goto out_ipres; | |
924 | } else { | |
925 | error = gfs2_trans_begin(sdp, 2 * RES_DINODE + RES_LEAF, 0); | |
926 | if (error) | |
927 | goto out_ipres; | |
928 | } | |
929 | ||
2baee03f | 930 | error = gfs2_meta_inode_buffer(ip, &dibh); |
b3b94faa DT |
931 | if (error) |
932 | goto out_end_trans; | |
933 | ||
2b47dad8 | 934 | error = gfs2_dir_add(dir, &dentry->d_name, ip, &da); |
2baee03f SW |
935 | if (error) |
936 | goto out_brelse; | |
937 | ||
350a9b0a | 938 | gfs2_trans_add_meta(ip->i_gl, dibh); |
2baee03f SW |
939 | inc_nlink(&ip->i_inode); |
940 | ip->i_inode.i_ctime = CURRENT_TIME; | |
ab9bbda0 SW |
941 | ihold(inode); |
942 | d_instantiate(dentry, inode); | |
943 | mark_inode_dirty(inode); | |
b3b94faa | 944 | |
2baee03f SW |
945 | out_brelse: |
946 | brelse(dibh); | |
feaa7bba | 947 | out_end_trans: |
b3b94faa | 948 | gfs2_trans_end(sdp); |
feaa7bba | 949 | out_ipres: |
3c1c0ae1 | 950 | if (da.nr_blocks) |
b3b94faa | 951 | gfs2_inplace_release(dip); |
feaa7bba | 952 | out_gunlock_q: |
3c1c0ae1 | 953 | if (da.nr_blocks) |
b3b94faa | 954 | gfs2_quota_unlock(dip); |
feaa7bba | 955 | out_gunlock: |
2b47dad8 | 956 | gfs2_dir_no_add(&da); |
72dbf479 BP |
957 | gfs2_glock_dq(ghs + 1); |
958 | out_child: | |
959 | gfs2_glock_dq(ghs); | |
960 | out_parent: | |
b3b94faa DT |
961 | gfs2_holder_uninit(ghs); |
962 | gfs2_holder_uninit(ghs + 1); | |
b3b94faa DT |
963 | return error; |
964 | } | |
965 | ||
87ec2174 SW |
966 | /* |
967 | * gfs2_unlink_ok - check to see that a inode is still in a directory | |
968 | * @dip: the directory | |
969 | * @name: the name of the file | |
970 | * @ip: the inode | |
971 | * | |
972 | * Assumes that the lock on (at least) @dip is held. | |
973 | * | |
974 | * Returns: 0 if the parent/child relationship is correct, errno if it isn't | |
975 | */ | |
976 | ||
977 | static int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name, | |
978 | const struct gfs2_inode *ip) | |
979 | { | |
980 | int error; | |
981 | ||
982 | if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode)) | |
983 | return -EPERM; | |
984 | ||
985 | if ((dip->i_inode.i_mode & S_ISVTX) && | |
6b24c0d2 EB |
986 | !uid_eq(dip->i_inode.i_uid, current_fsuid()) && |
987 | !uid_eq(ip->i_inode.i_uid, current_fsuid()) && !capable(CAP_FOWNER)) | |
87ec2174 SW |
988 | return -EPERM; |
989 | ||
990 | if (IS_APPEND(&dip->i_inode)) | |
991 | return -EPERM; | |
992 | ||
10556cb2 | 993 | error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC); |
87ec2174 SW |
994 | if (error) |
995 | return error; | |
996 | ||
37975f15 | 997 | return gfs2_dir_check(&dip->i_inode, name, ip); |
87ec2174 SW |
998 | } |
999 | ||
b3b94faa | 1000 | /** |
855d23ce SW |
1001 | * gfs2_unlink_inode - Removes an inode from its parent dir and unlinks it |
1002 | * @dip: The parent directory | |
1003 | * @name: The name of the entry in the parent directory | |
855d23ce SW |
1004 | * @inode: The inode to be removed |
1005 | * | |
1006 | * Called with all the locks and in a transaction. This will only be | |
1007 | * called for a directory after it has been checked to ensure it is empty. | |
1008 | * | |
1009 | * Returns: 0 on success, or an error | |
1010 | */ | |
1011 | ||
1012 | static int gfs2_unlink_inode(struct gfs2_inode *dip, | |
4327a9bf | 1013 | const struct dentry *dentry) |
855d23ce | 1014 | { |
2b0143b5 | 1015 | struct inode *inode = d_inode(dentry); |
855d23ce SW |
1016 | struct gfs2_inode *ip = GFS2_I(inode); |
1017 | int error; | |
1018 | ||
1019 | error = gfs2_dir_del(dip, dentry); | |
1020 | if (error) | |
1021 | return error; | |
1022 | ||
1023 | ip->i_entries = 0; | |
1024 | inode->i_ctime = CURRENT_TIME; | |
1025 | if (S_ISDIR(inode->i_mode)) | |
1026 | clear_nlink(inode); | |
1027 | else | |
1028 | drop_nlink(inode); | |
855d23ce SW |
1029 | mark_inode_dirty(inode); |
1030 | if (inode->i_nlink == 0) | |
1031 | gfs2_unlink_di(inode); | |
1032 | return 0; | |
1033 | } | |
1034 | ||
1035 | ||
1036 | /** | |
1037 | * gfs2_unlink - Unlink an inode (this does rmdir as well) | |
1038 | * @dir: The inode of the directory containing the inode to unlink | |
b3b94faa DT |
1039 | * @dentry: The file itself |
1040 | * | |
855d23ce SW |
1041 | * This routine uses the type of the inode as a flag to figure out |
1042 | * whether this is an unlink or an rmdir. | |
b3b94faa DT |
1043 | * |
1044 | * Returns: errno | |
1045 | */ | |
1046 | ||
1047 | static int gfs2_unlink(struct inode *dir, struct dentry *dentry) | |
1048 | { | |
feaa7bba SW |
1049 | struct gfs2_inode *dip = GFS2_I(dir); |
1050 | struct gfs2_sbd *sdp = GFS2_SB(dir); | |
2b0143b5 | 1051 | struct inode *inode = d_inode(dentry); |
855d23ce | 1052 | struct gfs2_inode *ip = GFS2_I(inode); |
ddee7608 RC |
1053 | struct gfs2_holder ghs[3]; |
1054 | struct gfs2_rgrpd *rgd; | |
5e2f7d61 BP |
1055 | int error; |
1056 | ||
1057 | error = gfs2_rindex_update(sdp); | |
1058 | if (error) | |
1059 | return error; | |
1060 | ||
1061 | error = -EROFS; | |
b3b94faa | 1062 | |
b3b94faa | 1063 | gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); |
ddee7608 | 1064 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); |
b3b94faa | 1065 | |
66fc061b | 1066 | rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr, 1); |
a365fbf3 | 1067 | if (!rgd) |
87654896 | 1068 | goto out_inodes; |
a365fbf3 | 1069 | |
ddee7608 RC |
1070 | gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2); |
1071 | ||
1072 | ||
8497a46e | 1073 | error = gfs2_glock_nq(ghs); /* parent */ |
b3b94faa | 1074 | if (error) |
8497a46e SW |
1075 | goto out_parent; |
1076 | ||
1077 | error = gfs2_glock_nq(ghs + 1); /* child */ | |
1078 | if (error) | |
1079 | goto out_child; | |
1080 | ||
d192a8e5 | 1081 | error = -ENOENT; |
855d23ce | 1082 | if (inode->i_nlink == 0) |
d192a8e5 SW |
1083 | goto out_rgrp; |
1084 | ||
855d23ce SW |
1085 | if (S_ISDIR(inode->i_mode)) { |
1086 | error = -ENOTEMPTY; | |
1087 | if (ip->i_entries > 2 || inode->i_nlink > 2) | |
1088 | goto out_rgrp; | |
1089 | } | |
1090 | ||
8497a46e SW |
1091 | error = gfs2_glock_nq(ghs + 2); /* rgrp */ |
1092 | if (error) | |
1093 | goto out_rgrp; | |
b3b94faa DT |
1094 | |
1095 | error = gfs2_unlink_ok(dip, &dentry->d_name, ip); | |
1096 | if (error) | |
72dbf479 | 1097 | goto out_gunlock; |
b3b94faa | 1098 | |
855d23ce | 1099 | error = gfs2_trans_begin(sdp, 2*RES_DINODE + 3*RES_LEAF + RES_RG_BIT, 0); |
855d23ce SW |
1100 | if (error) |
1101 | goto out_end_trans; | |
b3b94faa | 1102 | |
4327a9bf | 1103 | error = gfs2_unlink_inode(dip, dentry); |
b3b94faa | 1104 | |
feaa7bba SW |
1105 | out_end_trans: |
1106 | gfs2_trans_end(sdp); | |
72dbf479 | 1107 | out_gunlock: |
8497a46e SW |
1108 | gfs2_glock_dq(ghs + 2); |
1109 | out_rgrp: | |
8497a46e SW |
1110 | gfs2_glock_dq(ghs + 1); |
1111 | out_child: | |
8497a46e SW |
1112 | gfs2_glock_dq(ghs); |
1113 | out_parent: | |
87654896 SW |
1114 | gfs2_holder_uninit(ghs + 2); |
1115 | out_inodes: | |
1116 | gfs2_holder_uninit(ghs + 1); | |
8497a46e | 1117 | gfs2_holder_uninit(ghs); |
b3b94faa DT |
1118 | return error; |
1119 | } | |
1120 | ||
1121 | /** | |
1122 | * gfs2_symlink - Create a symlink | |
1123 | * @dir: The directory to create the symlink in | |
1124 | * @dentry: The dentry to put the symlink in | |
1125 | * @symname: The thing which the link points to | |
1126 | * | |
1127 | * Returns: errno | |
1128 | */ | |
1129 | ||
1130 | static int gfs2_symlink(struct inode *dir, struct dentry *dentry, | |
1131 | const char *symname) | |
1132 | { | |
feaa7bba | 1133 | struct gfs2_sbd *sdp = GFS2_SB(dir); |
160b4026 | 1134 | unsigned int size; |
b3b94faa | 1135 | |
b3b94faa DT |
1136 | size = strlen(symname); |
1137 | if (size > sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode) - 1) | |
1138 | return -ENAMETOOLONG; | |
1139 | ||
6d4ade98 | 1140 | return gfs2_create_inode(dir, dentry, NULL, S_IFLNK | S_IRWXUGO, 0, symname, size, 0, NULL); |
b3b94faa DT |
1141 | } |
1142 | ||
1143 | /** | |
1144 | * gfs2_mkdir - Make a directory | |
1145 | * @dir: The parent directory of the new one | |
1146 | * @dentry: The dentry of the new directory | |
1147 | * @mode: The mode of the new directory | |
1148 | * | |
1149 | * Returns: errno | |
1150 | */ | |
1151 | ||
18bb1db3 | 1152 | static int gfs2_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) |
b3b94faa | 1153 | { |
28fb3027 SW |
1154 | struct gfs2_sbd *sdp = GFS2_SB(dir); |
1155 | unsigned dsize = sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode); | |
6d4ade98 | 1156 | return gfs2_create_inode(dir, dentry, NULL, S_IFDIR | mode, 0, NULL, dsize, 0, NULL); |
b3b94faa DT |
1157 | } |
1158 | ||
b3b94faa DT |
1159 | /** |
1160 | * gfs2_mknod - Make a special file | |
1161 | * @dir: The directory in which the special file will reside | |
1162 | * @dentry: The dentry of the special file | |
1163 | * @mode: The mode of the special file | |
f2741d98 | 1164 | * @dev: The device specification of the special file |
b3b94faa DT |
1165 | * |
1166 | */ | |
1167 | ||
1a67aafb | 1168 | static int gfs2_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, |
b3b94faa DT |
1169 | dev_t dev) |
1170 | { | |
6d4ade98 SW |
1171 | return gfs2_create_inode(dir, dentry, NULL, mode, dev, NULL, 0, 0, NULL); |
1172 | } | |
1173 | ||
1174 | /** | |
1175 | * gfs2_atomic_open - Atomically open a file | |
1176 | * @dir: The directory | |
1177 | * @dentry: The proposed new entry | |
1178 | * @file: The proposed new struct file | |
1179 | * @flags: open flags | |
1180 | * @mode: File mode | |
1181 | * @opened: Flag to say whether the file has been opened or not | |
1182 | * | |
1183 | * Returns: error code or 0 for success | |
1184 | */ | |
1185 | ||
1186 | static int gfs2_atomic_open(struct inode *dir, struct dentry *dentry, | |
86fbca49 AO |
1187 | struct file *file, unsigned flags, |
1188 | umode_t mode, int *opened) | |
6d4ade98 SW |
1189 | { |
1190 | struct dentry *d; | |
1191 | bool excl = !!(flags & O_EXCL); | |
1192 | ||
4d93bc3e AV |
1193 | if (!d_unhashed(dentry)) |
1194 | goto skip_lookup; | |
1195 | ||
6d4ade98 SW |
1196 | d = __gfs2_lookup(dir, dentry, file, opened); |
1197 | if (IS_ERR(d)) | |
1198 | return PTR_ERR(d); | |
5ca1db41 MS |
1199 | if (d != NULL) |
1200 | dentry = d; | |
2b0143b5 | 1201 | if (d_really_is_positive(dentry)) { |
ec7d879c AV |
1202 | if (!(*opened & FILE_OPENED)) |
1203 | return finish_no_open(file, d); | |
5ca1db41 | 1204 | dput(d); |
6d4ade98 SW |
1205 | return 0; |
1206 | } | |
1207 | ||
5ca1db41 | 1208 | BUG_ON(d != NULL); |
4d93bc3e AV |
1209 | |
1210 | skip_lookup: | |
6d4ade98 SW |
1211 | if (!(flags & O_CREAT)) |
1212 | return -ENOENT; | |
1213 | ||
1214 | return gfs2_create_inode(dir, dentry, file, S_IFREG | mode, 0, NULL, 0, excl, opened); | |
b3b94faa DT |
1215 | } |
1216 | ||
0188d6c5 SW |
1217 | /* |
1218 | * gfs2_ok_to_move - check if it's ok to move a directory to another directory | |
1219 | * @this: move this | |
1220 | * @to: to here | |
1221 | * | |
1222 | * Follow @to back to the root and make sure we don't encounter @this | |
1223 | * Assumes we already hold the rename lock. | |
1224 | * | |
1225 | * Returns: errno | |
1226 | */ | |
1227 | ||
1228 | static int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to) | |
1229 | { | |
1230 | struct inode *dir = &to->i_inode; | |
1231 | struct super_block *sb = dir->i_sb; | |
1232 | struct inode *tmp; | |
0188d6c5 SW |
1233 | int error = 0; |
1234 | ||
0188d6c5 SW |
1235 | igrab(dir); |
1236 | ||
1237 | for (;;) { | |
1238 | if (dir == &this->i_inode) { | |
1239 | error = -EINVAL; | |
1240 | break; | |
1241 | } | |
2b0143b5 | 1242 | if (dir == d_inode(sb->s_root)) { |
0188d6c5 SW |
1243 | error = 0; |
1244 | break; | |
1245 | } | |
1246 | ||
8d123585 | 1247 | tmp = gfs2_lookupi(dir, &gfs2_qdotdot, 1); |
48f8f711 AD |
1248 | if (!tmp) { |
1249 | error = -ENOENT; | |
1250 | break; | |
1251 | } | |
0188d6c5 SW |
1252 | if (IS_ERR(tmp)) { |
1253 | error = PTR_ERR(tmp); | |
1254 | break; | |
1255 | } | |
1256 | ||
1257 | iput(dir); | |
1258 | dir = tmp; | |
1259 | } | |
1260 | ||
1261 | iput(dir); | |
1262 | ||
1263 | return error; | |
1264 | } | |
1265 | ||
a63b7bbc BM |
1266 | /** |
1267 | * update_moved_ino - Update an inode that's being moved | |
1268 | * @ip: The inode being moved | |
1269 | * @ndip: The parent directory of the new filename | |
1270 | * @dir_rename: True of ip is a directory | |
1271 | * | |
1272 | * Returns: errno | |
1273 | */ | |
1274 | ||
1275 | static int update_moved_ino(struct gfs2_inode *ip, struct gfs2_inode *ndip, | |
1276 | int dir_rename) | |
1277 | { | |
1278 | int error; | |
1279 | struct buffer_head *dibh; | |
1280 | ||
1281 | if (dir_rename) | |
1282 | return gfs2_dir_mvino(ip, &gfs2_qdotdot, ndip, DT_DIR); | |
1283 | ||
1284 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1285 | if (error) | |
1286 | return error; | |
1287 | ip->i_inode.i_ctime = CURRENT_TIME; | |
1288 | gfs2_trans_add_meta(ip->i_gl, dibh); | |
1289 | gfs2_dinode_out(ip, dibh->b_data); | |
1290 | brelse(dibh); | |
1291 | return 0; | |
1292 | } | |
1293 | ||
1294 | ||
b3b94faa DT |
1295 | /** |
1296 | * gfs2_rename - Rename a file | |
1297 | * @odir: Parent directory of old file name | |
1298 | * @odentry: The old dentry of the file | |
1299 | * @ndir: Parent directory of new file name | |
1300 | * @ndentry: The new dentry of the file | |
1301 | * | |
1302 | * Returns: errno | |
1303 | */ | |
1304 | ||
1305 | static int gfs2_rename(struct inode *odir, struct dentry *odentry, | |
1306 | struct inode *ndir, struct dentry *ndentry) | |
1307 | { | |
feaa7bba SW |
1308 | struct gfs2_inode *odip = GFS2_I(odir); |
1309 | struct gfs2_inode *ndip = GFS2_I(ndir); | |
2b0143b5 | 1310 | struct gfs2_inode *ip = GFS2_I(d_inode(odentry)); |
b3b94faa | 1311 | struct gfs2_inode *nip = NULL; |
feaa7bba | 1312 | struct gfs2_sbd *sdp = GFS2_SB(odir); |
8339ee54 | 1313 | struct gfs2_holder ghs[5], r_gh = { .gh_gl = NULL, }; |
ddee7608 | 1314 | struct gfs2_rgrpd *nrgd; |
b3b94faa DT |
1315 | unsigned int num_gh; |
1316 | int dir_rename = 0; | |
19aeb5a6 | 1317 | struct gfs2_diradd da = { .nr_blocks = 0, .save_loc = 0, }; |
b3b94faa DT |
1318 | unsigned int x; |
1319 | int error; | |
1320 | ||
2b0143b5 DH |
1321 | if (d_really_is_positive(ndentry)) { |
1322 | nip = GFS2_I(d_inode(ndentry)); | |
b3b94faa DT |
1323 | if (ip == nip) |
1324 | return 0; | |
1325 | } | |
1326 | ||
5e2f7d61 BP |
1327 | error = gfs2_rindex_update(sdp); |
1328 | if (error) | |
1329 | return error; | |
1330 | ||
b54e9a0b | 1331 | error = gfs2_rsqa_alloc(ndip); |
0a305e49 BP |
1332 | if (error) |
1333 | return error; | |
1334 | ||
0188d6c5 SW |
1335 | if (odip != ndip) { |
1336 | error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE, | |
1337 | 0, &r_gh); | |
b3b94faa DT |
1338 | if (error) |
1339 | goto out; | |
1340 | ||
0188d6c5 SW |
1341 | if (S_ISDIR(ip->i_inode.i_mode)) { |
1342 | dir_rename = 1; | |
a63b7bbc | 1343 | /* don't move a directory into its subdir */ |
0188d6c5 SW |
1344 | error = gfs2_ok_to_move(ip, ndip); |
1345 | if (error) | |
1346 | goto out_gunlock_r; | |
1347 | } | |
b3b94faa DT |
1348 | } |
1349 | ||
d9d1ca30 | 1350 | num_gh = 1; |
b3b94faa | 1351 | gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); |
d9d1ca30 SW |
1352 | if (odip != ndip) { |
1353 | gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); | |
1354 | num_gh++; | |
1355 | } | |
1356 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); | |
1357 | num_gh++; | |
b3b94faa | 1358 | |
d9d1ca30 SW |
1359 | if (nip) { |
1360 | gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); | |
1361 | num_gh++; | |
ddee7608 RC |
1362 | /* grab the resource lock for unlink flag twiddling |
1363 | * this is the case of the target file already existing | |
1364 | * so we unlink before doing the rename | |
1365 | */ | |
66fc061b | 1366 | nrgd = gfs2_blk2rgrpd(sdp, nip->i_no_addr, 1); |
ddee7608 RC |
1367 | if (nrgd) |
1368 | gfs2_holder_init(nrgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh++); | |
d9d1ca30 | 1369 | } |
b3b94faa | 1370 | |
72dbf479 BP |
1371 | for (x = 0; x < num_gh; x++) { |
1372 | error = gfs2_glock_nq(ghs + x); | |
1373 | if (error) | |
1374 | goto out_gunlock; | |
1375 | } | |
b3b94faa | 1376 | |
d192a8e5 SW |
1377 | error = -ENOENT; |
1378 | if (ip->i_inode.i_nlink == 0) | |
1379 | goto out_gunlock; | |
1380 | ||
b3b94faa DT |
1381 | /* Check out the old directory */ |
1382 | ||
1383 | error = gfs2_unlink_ok(odip, &odentry->d_name, ip); | |
1384 | if (error) | |
1385 | goto out_gunlock; | |
1386 | ||
1387 | /* Check out the new directory */ | |
1388 | ||
1389 | if (nip) { | |
1390 | error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip); | |
1391 | if (error) | |
1392 | goto out_gunlock; | |
1393 | ||
d192a8e5 SW |
1394 | if (nip->i_inode.i_nlink == 0) { |
1395 | error = -EAGAIN; | |
1396 | goto out_gunlock; | |
1397 | } | |
1398 | ||
b60623c2 | 1399 | if (S_ISDIR(nip->i_inode.i_mode)) { |
ad6203f2 | 1400 | if (nip->i_entries < 2) { |
94fb763b | 1401 | gfs2_consist_inode(nip); |
b3b94faa DT |
1402 | error = -EIO; |
1403 | goto out_gunlock; | |
1404 | } | |
ad6203f2 | 1405 | if (nip->i_entries > 2) { |
b3b94faa DT |
1406 | error = -ENOTEMPTY; |
1407 | goto out_gunlock; | |
1408 | } | |
1409 | } | |
1410 | } else { | |
10556cb2 | 1411 | error = gfs2_permission(ndir, MAY_WRITE | MAY_EXEC); |
b3b94faa DT |
1412 | if (error) |
1413 | goto out_gunlock; | |
1414 | ||
dbb7cae2 | 1415 | error = gfs2_dir_check(ndir, &ndentry->d_name, NULL); |
b3b94faa DT |
1416 | switch (error) { |
1417 | case -ENOENT: | |
1418 | error = 0; | |
1419 | break; | |
1420 | case 0: | |
1421 | error = -EEXIST; | |
1422 | default: | |
1423 | goto out_gunlock; | |
1424 | }; | |
1425 | ||
1426 | if (odip != ndip) { | |
4f56110a | 1427 | if (!ndip->i_inode.i_nlink) { |
d192a8e5 | 1428 | error = -ENOENT; |
b3b94faa DT |
1429 | goto out_gunlock; |
1430 | } | |
ad6203f2 | 1431 | if (ndip->i_entries == (u32)-1) { |
b3b94faa DT |
1432 | error = -EFBIG; |
1433 | goto out_gunlock; | |
1434 | } | |
b60623c2 | 1435 | if (S_ISDIR(ip->i_inode.i_mode) && |
4f56110a | 1436 | ndip->i_inode.i_nlink == (u32)-1) { |
b3b94faa DT |
1437 | error = -EMLINK; |
1438 | goto out_gunlock; | |
1439 | } | |
1440 | } | |
1441 | } | |
1442 | ||
1443 | /* Check out the dir to be renamed */ | |
1444 | ||
1445 | if (dir_rename) { | |
2b0143b5 | 1446 | error = gfs2_permission(d_inode(odentry), MAY_WRITE); |
b3b94faa DT |
1447 | if (error) |
1448 | goto out_gunlock; | |
1449 | } | |
1450 | ||
3c1c0ae1 SW |
1451 | if (nip == NULL) { |
1452 | error = gfs2_diradd_alloc_required(ndir, &ndentry->d_name, &da); | |
1453 | if (error) | |
1454 | goto out_gunlock; | |
1455 | } | |
b3b94faa | 1456 | |
3c1c0ae1 SW |
1457 | if (da.nr_blocks) { |
1458 | struct gfs2_alloc_parms ap = { .target = da.nr_blocks, }; | |
b8fbf471 | 1459 | error = gfs2_quota_lock_check(ndip, &ap); |
b3b94faa | 1460 | if (error) |
5407e242 | 1461 | goto out_gunlock; |
b3b94faa | 1462 | |
7b9cff46 | 1463 | error = gfs2_inplace_reserve(ndip, &ap); |
b3b94faa DT |
1464 | if (error) |
1465 | goto out_gunlock_q; | |
1466 | ||
534cf9ca SW |
1467 | error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(ndip, &da, 4) + |
1468 | 4 * RES_LEAF + 4, 0); | |
b3b94faa DT |
1469 | if (error) |
1470 | goto out_ipreserv; | |
1471 | } else { | |
1472 | error = gfs2_trans_begin(sdp, 4 * RES_DINODE + | |
87d21e07 | 1473 | 5 * RES_LEAF + 4, 0); |
b3b94faa DT |
1474 | if (error) |
1475 | goto out_gunlock; | |
1476 | } | |
1477 | ||
1478 | /* Remove the target file, if it exists */ | |
1479 | ||
4327a9bf BP |
1480 | if (nip) |
1481 | error = gfs2_unlink_inode(ndip, ndentry); | |
b3b94faa | 1482 | |
a63b7bbc BM |
1483 | error = update_moved_ino(ip, ndip, dir_rename); |
1484 | if (error) | |
1485 | goto out_end_trans; | |
b3b94faa | 1486 | |
855d23ce | 1487 | error = gfs2_dir_del(odip, odentry); |
b3b94faa DT |
1488 | if (error) |
1489 | goto out_end_trans; | |
1490 | ||
2b47dad8 | 1491 | error = gfs2_dir_add(ndir, &ndentry->d_name, ip, &da); |
b3b94faa DT |
1492 | if (error) |
1493 | goto out_end_trans; | |
1494 | ||
feaa7bba | 1495 | out_end_trans: |
b3b94faa | 1496 | gfs2_trans_end(sdp); |
feaa7bba | 1497 | out_ipreserv: |
3c1c0ae1 | 1498 | if (da.nr_blocks) |
b3b94faa | 1499 | gfs2_inplace_release(ndip); |
feaa7bba | 1500 | out_gunlock_q: |
3c1c0ae1 | 1501 | if (da.nr_blocks) |
b3b94faa | 1502 | gfs2_quota_unlock(ndip); |
feaa7bba | 1503 | out_gunlock: |
2b47dad8 | 1504 | gfs2_dir_no_add(&da); |
72dbf479 BP |
1505 | while (x--) { |
1506 | gfs2_glock_dq(ghs + x); | |
b3b94faa | 1507 | gfs2_holder_uninit(ghs + x); |
72dbf479 | 1508 | } |
feaa7bba | 1509 | out_gunlock_r: |
0188d6c5 | 1510 | if (r_gh.gh_gl) |
b3b94faa | 1511 | gfs2_glock_dq_uninit(&r_gh); |
feaa7bba | 1512 | out: |
b3b94faa DT |
1513 | return error; |
1514 | } | |
1515 | ||
a63b7bbc BM |
1516 | /** |
1517 | * gfs2_exchange - exchange two files | |
1518 | * @odir: Parent directory of old file name | |
1519 | * @odentry: The old dentry of the file | |
1520 | * @ndir: Parent directory of new file name | |
1521 | * @ndentry: The new dentry of the file | |
1522 | * @flags: The rename flags | |
1523 | * | |
1524 | * Returns: errno | |
1525 | */ | |
1526 | ||
1527 | static int gfs2_exchange(struct inode *odir, struct dentry *odentry, | |
1528 | struct inode *ndir, struct dentry *ndentry, | |
1529 | unsigned int flags) | |
1530 | { | |
1531 | struct gfs2_inode *odip = GFS2_I(odir); | |
1532 | struct gfs2_inode *ndip = GFS2_I(ndir); | |
1533 | struct gfs2_inode *oip = GFS2_I(odentry->d_inode); | |
1534 | struct gfs2_inode *nip = GFS2_I(ndentry->d_inode); | |
1535 | struct gfs2_sbd *sdp = GFS2_SB(odir); | |
1536 | struct gfs2_holder ghs[5], r_gh = { .gh_gl = NULL, }; | |
1537 | unsigned int num_gh; | |
1538 | unsigned int x; | |
1539 | umode_t old_mode = oip->i_inode.i_mode; | |
1540 | umode_t new_mode = nip->i_inode.i_mode; | |
1541 | int error; | |
1542 | ||
1543 | error = gfs2_rindex_update(sdp); | |
1544 | if (error) | |
1545 | return error; | |
1546 | ||
1547 | if (odip != ndip) { | |
1548 | error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE, | |
1549 | 0, &r_gh); | |
1550 | if (error) | |
1551 | goto out; | |
1552 | ||
1553 | if (S_ISDIR(old_mode)) { | |
1554 | /* don't move a directory into its subdir */ | |
1555 | error = gfs2_ok_to_move(oip, ndip); | |
1556 | if (error) | |
1557 | goto out_gunlock_r; | |
1558 | } | |
1559 | ||
1560 | if (S_ISDIR(new_mode)) { | |
1561 | /* don't move a directory into its subdir */ | |
1562 | error = gfs2_ok_to_move(nip, odip); | |
1563 | if (error) | |
1564 | goto out_gunlock_r; | |
1565 | } | |
1566 | } | |
1567 | ||
1568 | num_gh = 1; | |
1569 | gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); | |
1570 | if (odip != ndip) { | |
1571 | gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); | |
1572 | num_gh++; | |
1573 | } | |
1574 | gfs2_holder_init(oip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); | |
1575 | num_gh++; | |
1576 | ||
1577 | gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh); | |
1578 | num_gh++; | |
1579 | ||
1580 | for (x = 0; x < num_gh; x++) { | |
1581 | error = gfs2_glock_nq(ghs + x); | |
1582 | if (error) | |
1583 | goto out_gunlock; | |
1584 | } | |
1585 | ||
1586 | error = -ENOENT; | |
1587 | if (oip->i_inode.i_nlink == 0 || nip->i_inode.i_nlink == 0) | |
1588 | goto out_gunlock; | |
1589 | ||
1590 | error = gfs2_unlink_ok(odip, &odentry->d_name, oip); | |
1591 | if (error) | |
1592 | goto out_gunlock; | |
1593 | error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip); | |
1594 | if (error) | |
1595 | goto out_gunlock; | |
1596 | ||
1597 | if (S_ISDIR(old_mode)) { | |
1598 | error = gfs2_permission(odentry->d_inode, MAY_WRITE); | |
1599 | if (error) | |
1600 | goto out_gunlock; | |
1601 | } | |
1602 | if (S_ISDIR(new_mode)) { | |
1603 | error = gfs2_permission(ndentry->d_inode, MAY_WRITE); | |
1604 | if (error) | |
1605 | goto out_gunlock; | |
1606 | } | |
1607 | error = gfs2_trans_begin(sdp, 4 * RES_DINODE + 4 * RES_LEAF, 0); | |
1608 | if (error) | |
1609 | goto out_gunlock; | |
1610 | ||
1611 | error = update_moved_ino(oip, ndip, S_ISDIR(old_mode)); | |
1612 | if (error) | |
1613 | goto out_end_trans; | |
1614 | ||
1615 | error = update_moved_ino(nip, odip, S_ISDIR(new_mode)); | |
1616 | if (error) | |
1617 | goto out_end_trans; | |
1618 | ||
1619 | error = gfs2_dir_mvino(ndip, &ndentry->d_name, oip, | |
1620 | IF2DT(old_mode)); | |
1621 | if (error) | |
1622 | goto out_end_trans; | |
1623 | ||
1624 | error = gfs2_dir_mvino(odip, &odentry->d_name, nip, | |
1625 | IF2DT(new_mode)); | |
1626 | if (error) | |
1627 | goto out_end_trans; | |
1628 | ||
1629 | if (odip != ndip) { | |
1630 | if (S_ISDIR(new_mode) && !S_ISDIR(old_mode)) { | |
1631 | inc_nlink(&odip->i_inode); | |
1632 | drop_nlink(&ndip->i_inode); | |
1633 | } else if (S_ISDIR(old_mode) && !S_ISDIR(new_mode)) { | |
1634 | inc_nlink(&ndip->i_inode); | |
1635 | drop_nlink(&odip->i_inode); | |
1636 | } | |
1637 | } | |
1638 | mark_inode_dirty(&ndip->i_inode); | |
1639 | if (odip != ndip) | |
1640 | mark_inode_dirty(&odip->i_inode); | |
1641 | ||
1642 | out_end_trans: | |
1643 | gfs2_trans_end(sdp); | |
1644 | out_gunlock: | |
1645 | while (x--) { | |
1646 | gfs2_glock_dq(ghs + x); | |
1647 | gfs2_holder_uninit(ghs + x); | |
1648 | } | |
1649 | out_gunlock_r: | |
1650 | if (r_gh.gh_gl) | |
1651 | gfs2_glock_dq_uninit(&r_gh); | |
1652 | out: | |
1653 | return error; | |
1654 | } | |
1655 | ||
1656 | static int gfs2_rename2(struct inode *odir, struct dentry *odentry, | |
1657 | struct inode *ndir, struct dentry *ndentry, | |
1658 | unsigned int flags) | |
1659 | { | |
1660 | flags &= ~RENAME_NOREPLACE; | |
1661 | ||
1662 | if (flags & ~RENAME_EXCHANGE) | |
1663 | return -EINVAL; | |
1664 | ||
1665 | if (flags & RENAME_EXCHANGE) | |
1666 | return gfs2_exchange(odir, odentry, ndir, ndentry, flags); | |
1667 | ||
1668 | return gfs2_rename(odir, odentry, ndir, ndentry); | |
1669 | } | |
1670 | ||
536baf02 | 1671 | /** |
6b255391 | 1672 | * gfs2_get_link - Follow a symbolic link |
c177c2ac | 1673 | * @dentry: The dentry of the link |
6b255391 | 1674 | * @inode: The inode of the link |
fceef393 | 1675 | * @done: destructor for return value |
536baf02 | 1676 | * |
c177c2ac | 1677 | * This can handle symlinks of any size. |
536baf02 | 1678 | * |
c177c2ac | 1679 | * Returns: 0 on success or error code |
536baf02 SW |
1680 | */ |
1681 | ||
6b255391 | 1682 | static const char *gfs2_get_link(struct dentry *dentry, |
fceef393 AV |
1683 | struct inode *inode, |
1684 | struct delayed_call *done) | |
536baf02 | 1685 | { |
6b255391 | 1686 | struct gfs2_inode *ip = GFS2_I(inode); |
536baf02 SW |
1687 | struct gfs2_holder i_gh; |
1688 | struct buffer_head *dibh; | |
160b4026 | 1689 | unsigned int size; |
c177c2ac | 1690 | char *buf; |
536baf02 SW |
1691 | int error; |
1692 | ||
6b255391 AV |
1693 | if (!dentry) |
1694 | return ERR_PTR(-ECHILD); | |
1695 | ||
536baf02 SW |
1696 | gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh); |
1697 | error = gfs2_glock_nq(&i_gh); | |
1698 | if (error) { | |
1699 | gfs2_holder_uninit(&i_gh); | |
680baacb | 1700 | return ERR_PTR(error); |
536baf02 SW |
1701 | } |
1702 | ||
a2e0f799 SW |
1703 | size = (unsigned int)i_size_read(&ip->i_inode); |
1704 | if (size == 0) { | |
536baf02 | 1705 | gfs2_consist_inode(ip); |
c177c2ac | 1706 | buf = ERR_PTR(-EIO); |
536baf02 SW |
1707 | goto out; |
1708 | } | |
1709 | ||
1710 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
c177c2ac AV |
1711 | if (error) { |
1712 | buf = ERR_PTR(error); | |
536baf02 | 1713 | goto out; |
536baf02 SW |
1714 | } |
1715 | ||
160b4026 | 1716 | buf = kzalloc(size + 1, GFP_NOFS); |
c177c2ac AV |
1717 | if (!buf) |
1718 | buf = ERR_PTR(-ENOMEM); | |
1719 | else | |
160b4026 | 1720 | memcpy(buf, dibh->b_data + sizeof(struct gfs2_dinode), size); |
536baf02 SW |
1721 | brelse(dibh); |
1722 | out: | |
1723 | gfs2_glock_dq_uninit(&i_gh); | |
680baacb | 1724 | if (!IS_ERR(buf)) |
fceef393 | 1725 | set_delayed_call(done, kfree_link, buf); |
680baacb | 1726 | return buf; |
b3b94faa DT |
1727 | } |
1728 | ||
b3b94faa DT |
1729 | /** |
1730 | * gfs2_permission - | |
75d5cfbe SW |
1731 | * @inode: The inode |
1732 | * @mask: The mask to be tested | |
1733 | * @flags: Indicates whether this is an RCU path walk or not | |
b3b94faa | 1734 | * |
300c7d75 SW |
1735 | * This may be called from the VFS directly, or from within GFS2 with the |
1736 | * inode locked, so we look to see if the glock is already locked and only | |
1737 | * lock the glock if its not already been done. | |
1738 | * | |
b3b94faa DT |
1739 | * Returns: errno |
1740 | */ | |
1741 | ||
10556cb2 | 1742 | int gfs2_permission(struct inode *inode, int mask) |
b3b94faa | 1743 | { |
b74c79e9 | 1744 | struct gfs2_inode *ip; |
b3b94faa DT |
1745 | struct gfs2_holder i_gh; |
1746 | int error; | |
300c7d75 | 1747 | int unlock = 0; |
b3b94faa | 1748 | |
b74c79e9 NP |
1749 | |
1750 | ip = GFS2_I(inode); | |
7afd88d9 | 1751 | if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) { |
2e60d768 BM |
1752 | if (mask & MAY_NOT_BLOCK) |
1753 | return -ECHILD; | |
1754 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh); | |
1755 | if (error) | |
1756 | return error; | |
1757 | unlock = 1; | |
300c7d75 | 1758 | } |
b3b94faa | 1759 | |
f58ba889 MS |
1760 | if ((mask & MAY_WRITE) && IS_IMMUTABLE(inode)) |
1761 | error = -EACCES; | |
1762 | else | |
2830ba7f | 1763 | error = generic_permission(inode, mask); |
300c7d75 | 1764 | if (unlock) |
b3b94faa | 1765 | gfs2_glock_dq_uninit(&i_gh); |
b3b94faa DT |
1766 | |
1767 | return error; | |
1768 | } | |
1769 | ||
ab9bbda0 | 1770 | static int __gfs2_setattr_simple(struct inode *inode, struct iattr *attr) |
194c011f | 1771 | { |
194c011f SW |
1772 | setattr_copy(inode, attr); |
1773 | mark_inode_dirty(inode); | |
194c011f SW |
1774 | return 0; |
1775 | } | |
1776 | ||
1777 | /** | |
1778 | * gfs2_setattr_simple - | |
1779 | * @ip: | |
1780 | * @attr: | |
1781 | * | |
1782 | * Returns: errno | |
1783 | */ | |
1784 | ||
ab9bbda0 | 1785 | int gfs2_setattr_simple(struct inode *inode, struct iattr *attr) |
194c011f SW |
1786 | { |
1787 | int error; | |
1788 | ||
1789 | if (current->journal_info) | |
ab9bbda0 | 1790 | return __gfs2_setattr_simple(inode, attr); |
194c011f | 1791 | |
ab9bbda0 | 1792 | error = gfs2_trans_begin(GFS2_SB(inode), RES_DINODE, 0); |
194c011f SW |
1793 | if (error) |
1794 | return error; | |
1795 | ||
ab9bbda0 SW |
1796 | error = __gfs2_setattr_simple(inode, attr); |
1797 | gfs2_trans_end(GFS2_SB(inode)); | |
194c011f SW |
1798 | return error; |
1799 | } | |
1800 | ||
b3b94faa DT |
1801 | static int setattr_chown(struct inode *inode, struct iattr *attr) |
1802 | { | |
feaa7bba SW |
1803 | struct gfs2_inode *ip = GFS2_I(inode); |
1804 | struct gfs2_sbd *sdp = GFS2_SB(inode); | |
7c06b5d6 EB |
1805 | kuid_t ouid, nuid; |
1806 | kgid_t ogid, ngid; | |
b3b94faa | 1807 | int error; |
b8fbf471 | 1808 | struct gfs2_alloc_parms ap; |
b3b94faa | 1809 | |
2933f925 SW |
1810 | ouid = inode->i_uid; |
1811 | ogid = inode->i_gid; | |
b3b94faa DT |
1812 | nuid = attr->ia_uid; |
1813 | ngid = attr->ia_gid; | |
1814 | ||
6b24c0d2 | 1815 | if (!(attr->ia_valid & ATTR_UID) || uid_eq(ouid, nuid)) |
f4108a60 | 1816 | ouid = nuid = NO_UID_QUOTA_CHANGE; |
6b24c0d2 | 1817 | if (!(attr->ia_valid & ATTR_GID) || gid_eq(ogid, ngid)) |
f4108a60 | 1818 | ogid = ngid = NO_GID_QUOTA_CHANGE; |
b3b94faa | 1819 | |
b54e9a0b | 1820 | error = gfs2_rsqa_alloc(ip); |
62e96cf8 BP |
1821 | if (error) |
1822 | goto out; | |
1823 | ||
1824 | error = gfs2_rindex_update(sdp); | |
1825 | if (error) | |
1826 | goto out; | |
1827 | ||
1828 | error = gfs2_quota_lock(ip, nuid, ngid); | |
1829 | if (error) | |
1830 | goto out; | |
1831 | ||
b8fbf471 AD |
1832 | ap.target = gfs2_get_inode_blocks(&ip->i_inode); |
1833 | ||
6b24c0d2 EB |
1834 | if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) || |
1835 | !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) { | |
b8fbf471 | 1836 | error = gfs2_quota_check(ip, nuid, ngid, &ap); |
b3b94faa DT |
1837 | if (error) |
1838 | goto out_gunlock_q; | |
1839 | } | |
1840 | ||
1841 | error = gfs2_trans_begin(sdp, RES_DINODE + 2 * RES_QUOTA, 0); | |
1842 | if (error) | |
1843 | goto out_gunlock_q; | |
1844 | ||
ab9bbda0 | 1845 | error = gfs2_setattr_simple(inode, attr); |
b3b94faa DT |
1846 | if (error) |
1847 | goto out_end_trans; | |
1848 | ||
6b24c0d2 EB |
1849 | if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) || |
1850 | !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) { | |
39a72580 | 1851 | gfs2_quota_change(ip, -(s64)ap.target, ouid, ogid); |
b8fbf471 | 1852 | gfs2_quota_change(ip, ap.target, nuid, ngid); |
b3b94faa DT |
1853 | } |
1854 | ||
a91ea69f | 1855 | out_end_trans: |
b3b94faa | 1856 | gfs2_trans_end(sdp); |
a91ea69f | 1857 | out_gunlock_q: |
b3b94faa | 1858 | gfs2_quota_unlock(ip); |
62e96cf8 | 1859 | out: |
b3b94faa DT |
1860 | return error; |
1861 | } | |
1862 | ||
1863 | /** | |
1864 | * gfs2_setattr - Change attributes on an inode | |
1865 | * @dentry: The dentry which is changing | |
1866 | * @attr: The structure describing the change | |
1867 | * | |
1868 | * The VFS layer wants to change one or more of an inodes attributes. Write | |
1869 | * that change out to disk. | |
1870 | * | |
1871 | * Returns: errno | |
1872 | */ | |
1873 | ||
1874 | static int gfs2_setattr(struct dentry *dentry, struct iattr *attr) | |
1875 | { | |
2b0143b5 | 1876 | struct inode *inode = d_inode(dentry); |
feaa7bba | 1877 | struct gfs2_inode *ip = GFS2_I(inode); |
b3b94faa DT |
1878 | struct gfs2_holder i_gh; |
1879 | int error; | |
1880 | ||
b54e9a0b | 1881 | error = gfs2_rsqa_alloc(ip); |
0a305e49 BP |
1882 | if (error) |
1883 | return error; | |
1884 | ||
b3b94faa DT |
1885 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); |
1886 | if (error) | |
1887 | return error; | |
1888 | ||
1889 | error = -EPERM; | |
1890 | if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) | |
1891 | goto out; | |
1892 | ||
1893 | error = inode_change_ok(inode, attr); | |
1894 | if (error) | |
1895 | goto out; | |
1896 | ||
1897 | if (attr->ia_valid & ATTR_SIZE) | |
ff8f33c8 | 1898 | error = gfs2_setattr_size(inode, attr->ia_size); |
b3b94faa DT |
1899 | else if (attr->ia_valid & (ATTR_UID | ATTR_GID)) |
1900 | error = setattr_chown(inode, attr); | |
e01580bf | 1901 | else { |
ab9bbda0 | 1902 | error = gfs2_setattr_simple(inode, attr); |
e01580bf CH |
1903 | if (!error && attr->ia_valid & ATTR_MODE) |
1904 | error = posix_acl_chmod(inode, inode->i_mode); | |
1905 | } | |
b3b94faa | 1906 | |
a91ea69f | 1907 | out: |
b3b94faa DT |
1908 | if (!error) |
1909 | mark_inode_dirty(inode); | |
ab9bbda0 | 1910 | gfs2_glock_dq_uninit(&i_gh); |
b3b94faa DT |
1911 | return error; |
1912 | } | |
1913 | ||
1914 | /** | |
1915 | * gfs2_getattr - Read out an inode's attributes | |
26c1a574 | 1916 | * @mnt: The vfsmount the inode is being accessed from |
b3b94faa DT |
1917 | * @dentry: The dentry to stat |
1918 | * @stat: The inode's stats | |
1919 | * | |
dcf3dd85 SW |
1920 | * This may be called from the VFS directly, or from within GFS2 with the |
1921 | * inode locked, so we look to see if the glock is already locked and only | |
1922 | * lock the glock if its not already been done. Note that its the NFS | |
1923 | * readdirplus operation which causes this to be called (from filldir) | |
1924 | * with the glock already held. | |
1925 | * | |
b3b94faa DT |
1926 | * Returns: errno |
1927 | */ | |
1928 | ||
1929 | static int gfs2_getattr(struct vfsmount *mnt, struct dentry *dentry, | |
1930 | struct kstat *stat) | |
1931 | { | |
2b0143b5 | 1932 | struct inode *inode = d_inode(dentry); |
feaa7bba | 1933 | struct gfs2_inode *ip = GFS2_I(inode); |
b3b94faa DT |
1934 | struct gfs2_holder gh; |
1935 | int error; | |
dcf3dd85 | 1936 | int unlock = 0; |
b3b94faa | 1937 | |
7afd88d9 | 1938 | if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) { |
2e60d768 BM |
1939 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); |
1940 | if (error) | |
1941 | return error; | |
1942 | unlock = 1; | |
b3b94faa DT |
1943 | } |
1944 | ||
dcf3dd85 | 1945 | generic_fillattr(inode, stat); |
d7c103d0 | 1946 | if (unlock) |
dcf3dd85 SW |
1947 | gfs2_glock_dq_uninit(&gh); |
1948 | ||
1949 | return 0; | |
b3b94faa DT |
1950 | } |
1951 | ||
1952 | static int gfs2_setxattr(struct dentry *dentry, const char *name, | |
1953 | const void *data, size_t size, int flags) | |
1954 | { | |
2b0143b5 | 1955 | struct inode *inode = d_inode(dentry); |
40b78a32 SW |
1956 | struct gfs2_inode *ip = GFS2_I(inode); |
1957 | struct gfs2_holder gh; | |
1958 | int ret; | |
b3b94faa | 1959 | |
40b78a32 SW |
1960 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); |
1961 | ret = gfs2_glock_nq(&gh); | |
1962 | if (ret == 0) { | |
b54e9a0b | 1963 | ret = gfs2_rsqa_alloc(ip); |
645b2ccc SW |
1964 | if (ret == 0) |
1965 | ret = generic_setxattr(dentry, name, data, size, flags); | |
40b78a32 SW |
1966 | gfs2_glock_dq(&gh); |
1967 | } | |
1968 | gfs2_holder_uninit(&gh); | |
1969 | return ret; | |
b3b94faa DT |
1970 | } |
1971 | ||
1972 | static ssize_t gfs2_getxattr(struct dentry *dentry, const char *name, | |
1973 | void *data, size_t size) | |
1974 | { | |
2b0143b5 | 1975 | struct inode *inode = d_inode(dentry); |
40b78a32 SW |
1976 | struct gfs2_inode *ip = GFS2_I(inode); |
1977 | struct gfs2_holder gh; | |
1978 | int ret; | |
b3b94faa | 1979 | |
7bd9ee58 SW |
1980 | /* For selinux during lookup */ |
1981 | if (gfs2_glock_is_locked_by_me(ip->i_gl)) | |
1982 | return generic_getxattr(dentry, name, data, size); | |
1983 | ||
40b78a32 SW |
1984 | gfs2_holder_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); |
1985 | ret = gfs2_glock_nq(&gh); | |
1986 | if (ret == 0) { | |
1987 | ret = generic_getxattr(dentry, name, data, size); | |
1988 | gfs2_glock_dq(&gh); | |
1989 | } | |
1990 | gfs2_holder_uninit(&gh); | |
1991 | return ret; | |
b3b94faa DT |
1992 | } |
1993 | ||
1994 | static int gfs2_removexattr(struct dentry *dentry, const char *name) | |
1995 | { | |
2b0143b5 | 1996 | struct inode *inode = d_inode(dentry); |
40b78a32 SW |
1997 | struct gfs2_inode *ip = GFS2_I(inode); |
1998 | struct gfs2_holder gh; | |
1999 | int ret; | |
b3b94faa | 2000 | |
40b78a32 SW |
2001 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); |
2002 | ret = gfs2_glock_nq(&gh); | |
2003 | if (ret == 0) { | |
b54e9a0b | 2004 | ret = gfs2_rsqa_alloc(ip); |
645b2ccc SW |
2005 | if (ret == 0) |
2006 | ret = generic_removexattr(dentry, name); | |
40b78a32 SW |
2007 | gfs2_glock_dq(&gh); |
2008 | } | |
2009 | gfs2_holder_uninit(&gh); | |
2010 | return ret; | |
b3b94faa DT |
2011 | } |
2012 | ||
e9079cce SW |
2013 | static int gfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, |
2014 | u64 start, u64 len) | |
2015 | { | |
2016 | struct gfs2_inode *ip = GFS2_I(inode); | |
2017 | struct gfs2_holder gh; | |
2018 | int ret; | |
2019 | ||
2020 | ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC); | |
2021 | if (ret) | |
2022 | return ret; | |
2023 | ||
2024 | mutex_lock(&inode->i_mutex); | |
2025 | ||
2026 | ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh); | |
2027 | if (ret) | |
2028 | goto out; | |
2029 | ||
2030 | if (gfs2_is_stuffed(ip)) { | |
2031 | u64 phys = ip->i_no_addr << inode->i_blkbits; | |
2032 | u64 size = i_size_read(inode); | |
2033 | u32 flags = FIEMAP_EXTENT_LAST|FIEMAP_EXTENT_NOT_ALIGNED| | |
2034 | FIEMAP_EXTENT_DATA_INLINE; | |
2035 | phys += sizeof(struct gfs2_dinode); | |
2036 | phys += start; | |
2037 | if (start + len > size) | |
2038 | len = size - start; | |
2039 | if (start < size) | |
2040 | ret = fiemap_fill_next_extent(fieinfo, start, phys, | |
2041 | len, flags); | |
2042 | if (ret == 1) | |
2043 | ret = 0; | |
2044 | } else { | |
2045 | ret = __generic_block_fiemap(inode, fieinfo, start, len, | |
2046 | gfs2_block_map); | |
2047 | } | |
2048 | ||
2049 | gfs2_glock_dq_uninit(&gh); | |
2050 | out: | |
2051 | mutex_unlock(&inode->i_mutex); | |
2052 | return ret; | |
2053 | } | |
2054 | ||
92e1d5be | 2055 | const struct inode_operations gfs2_file_iops = { |
e6305c43 | 2056 | .permission = gfs2_permission, |
b3b94faa DT |
2057 | .setattr = gfs2_setattr, |
2058 | .getattr = gfs2_getattr, | |
2059 | .setxattr = gfs2_setxattr, | |
2060 | .getxattr = gfs2_getxattr, | |
2061 | .listxattr = gfs2_listxattr, | |
2062 | .removexattr = gfs2_removexattr, | |
e9079cce | 2063 | .fiemap = gfs2_fiemap, |
4e34e719 | 2064 | .get_acl = gfs2_get_acl, |
e01580bf | 2065 | .set_acl = gfs2_set_acl, |
b3b94faa DT |
2066 | }; |
2067 | ||
92e1d5be | 2068 | const struct inode_operations gfs2_dir_iops = { |
b3b94faa DT |
2069 | .create = gfs2_create, |
2070 | .lookup = gfs2_lookup, | |
2071 | .link = gfs2_link, | |
2072 | .unlink = gfs2_unlink, | |
2073 | .symlink = gfs2_symlink, | |
2074 | .mkdir = gfs2_mkdir, | |
855d23ce | 2075 | .rmdir = gfs2_unlink, |
b3b94faa | 2076 | .mknod = gfs2_mknod, |
a63b7bbc | 2077 | .rename2 = gfs2_rename2, |
e6305c43 | 2078 | .permission = gfs2_permission, |
b3b94faa DT |
2079 | .setattr = gfs2_setattr, |
2080 | .getattr = gfs2_getattr, | |
2081 | .setxattr = gfs2_setxattr, | |
2082 | .getxattr = gfs2_getxattr, | |
2083 | .listxattr = gfs2_listxattr, | |
2084 | .removexattr = gfs2_removexattr, | |
e9079cce | 2085 | .fiemap = gfs2_fiemap, |
4e34e719 | 2086 | .get_acl = gfs2_get_acl, |
e01580bf | 2087 | .set_acl = gfs2_set_acl, |
6d4ade98 | 2088 | .atomic_open = gfs2_atomic_open, |
b3b94faa DT |
2089 | }; |
2090 | ||
92e1d5be | 2091 | const struct inode_operations gfs2_symlink_iops = { |
c177c2ac | 2092 | .readlink = generic_readlink, |
6b255391 | 2093 | .get_link = gfs2_get_link, |
e6305c43 | 2094 | .permission = gfs2_permission, |
b3b94faa DT |
2095 | .setattr = gfs2_setattr, |
2096 | .getattr = gfs2_getattr, | |
2097 | .setxattr = gfs2_setxattr, | |
2098 | .getxattr = gfs2_getxattr, | |
2099 | .listxattr = gfs2_listxattr, | |
2100 | .removexattr = gfs2_removexattr, | |
e9079cce | 2101 | .fiemap = gfs2_fiemap, |
b3b94faa DT |
2102 | }; |
2103 |