David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. |
| 3 | * Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved. |
| 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 |
| 7 | * of the GNU General Public License v.2. |
| 8 | */ |
| 9 | |
| 10 | #include <linux/sched.h> |
| 11 | #include <linux/slab.h> |
| 12 | #include <linux/spinlock.h> |
| 13 | #include <linux/completion.h> |
| 14 | #include <linux/buffer_head.h> |
| 15 | #include <linux/namei.h> |
| 16 | #include <linux/utsname.h> |
| 17 | #include <linux/mm.h> |
| 18 | #include <linux/xattr.h> |
| 19 | #include <linux/posix_acl.h> |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame^] | 20 | #include <linux/gfs2_ondisk.h> |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 21 | #include <asm/semaphore.h> |
| 22 | #include <asm/uaccess.h> |
| 23 | |
| 24 | #include "gfs2.h" |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame^] | 25 | #include "lm_interface.h" |
| 26 | #include "incore.h" |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 27 | #include "acl.h" |
| 28 | #include "bmap.h" |
| 29 | #include "dir.h" |
| 30 | #include "eaops.h" |
| 31 | #include "eattr.h" |
| 32 | #include "glock.h" |
| 33 | #include "inode.h" |
| 34 | #include "meta_io.h" |
| 35 | #include "ops_dentry.h" |
| 36 | #include "ops_inode.h" |
| 37 | #include "page.h" |
| 38 | #include "quota.h" |
| 39 | #include "rgrp.h" |
| 40 | #include "trans.h" |
| 41 | #include "unlinked.h" |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame^] | 42 | #include "util.h" |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 43 | |
| 44 | /** |
| 45 | * gfs2_create - Create a file |
| 46 | * @dir: The directory in which to create the file |
| 47 | * @dentry: The dentry of the new file |
| 48 | * @mode: The mode of the new file |
| 49 | * |
| 50 | * Returns: errno |
| 51 | */ |
| 52 | |
| 53 | static int gfs2_create(struct inode *dir, struct dentry *dentry, |
| 54 | int mode, struct nameidata *nd) |
| 55 | { |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame^] | 56 | struct gfs2_inode *dip = dir->u.generic_ip; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 57 | struct gfs2_sbd *sdp = dip->i_sbd; |
| 58 | struct gfs2_holder ghs[2]; |
| 59 | struct inode *inode; |
| 60 | int new = 1; |
| 61 | int error; |
| 62 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 63 | gfs2_holder_init(dip->i_gl, 0, 0, ghs); |
| 64 | |
| 65 | for (;;) { |
Steven Whitehouse | 7359a19 | 2006-02-13 12:27:43 +0000 | [diff] [blame] | 66 | inode = gfs2_createi(ghs, &dentry->d_name, S_IFREG | mode); |
| 67 | if (!IS_ERR(inode)) { |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 68 | gfs2_trans_end(sdp); |
| 69 | if (dip->i_alloc.al_rgd) |
| 70 | gfs2_inplace_release(dip); |
| 71 | gfs2_quota_unlock(dip); |
| 72 | gfs2_alloc_put(dip); |
| 73 | gfs2_glock_dq_uninit_m(2, ghs); |
| 74 | break; |
Steven Whitehouse | 7359a19 | 2006-02-13 12:27:43 +0000 | [diff] [blame] | 75 | } else if (PTR_ERR(inode) != -EEXIST || |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 76 | (nd->intent.open.flags & O_EXCL)) { |
| 77 | gfs2_holder_uninit(ghs); |
Steven Whitehouse | 7359a19 | 2006-02-13 12:27:43 +0000 | [diff] [blame] | 78 | return PTR_ERR(inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 79 | } |
| 80 | |
Steven Whitehouse | 7359a19 | 2006-02-13 12:27:43 +0000 | [diff] [blame] | 81 | error = gfs2_lookupi(dir, &dentry->d_name, 0, &inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 82 | if (!error) { |
| 83 | new = 0; |
| 84 | gfs2_holder_uninit(ghs); |
| 85 | break; |
| 86 | } else if (error != -ENOENT) { |
| 87 | gfs2_holder_uninit(ghs); |
| 88 | return error; |
| 89 | } |
| 90 | } |
| 91 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 92 | d_instantiate(dentry, inode); |
| 93 | if (new) |
| 94 | mark_inode_dirty(inode); |
| 95 | |
| 96 | return 0; |
| 97 | } |
| 98 | |
| 99 | /** |
| 100 | * gfs2_lookup - Look up a filename in a directory and return its inode |
| 101 | * @dir: The directory inode |
| 102 | * @dentry: The dentry of the new inode |
| 103 | * @nd: passed from Linux VFS, ignored by us |
| 104 | * |
| 105 | * Called by the VFS layer. Lock dir and call gfs2_lookupi() |
| 106 | * |
| 107 | * Returns: errno |
| 108 | */ |
| 109 | |
| 110 | static struct dentry *gfs2_lookup(struct inode *dir, struct dentry *dentry, |
| 111 | struct nameidata *nd) |
| 112 | { |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame^] | 113 | struct gfs2_inode *dip = dir->u.generic_ip; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 114 | struct gfs2_sbd *sdp = dip->i_sbd; |
| 115 | struct inode *inode = NULL; |
| 116 | int error; |
| 117 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 118 | if (!sdp->sd_args.ar_localcaching) |
| 119 | dentry->d_op = &gfs2_dops; |
| 120 | |
Steven Whitehouse | 7359a19 | 2006-02-13 12:27:43 +0000 | [diff] [blame] | 121 | error = gfs2_lookupi(dir, &dentry->d_name, 0, &inode); |
| 122 | if (error && error != -ENOENT) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 123 | return ERR_PTR(error); |
| 124 | |
| 125 | if (inode) |
| 126 | return d_splice_alias(inode, dentry); |
| 127 | d_add(dentry, inode); |
| 128 | |
| 129 | return NULL; |
| 130 | } |
| 131 | |
| 132 | /** |
| 133 | * gfs2_link - Link to a file |
| 134 | * @old_dentry: The inode to link |
| 135 | * @dir: Add link to this directory |
| 136 | * @dentry: The name of the link |
| 137 | * |
| 138 | * Link the inode in "old_dentry" into the directory "dir" with the |
| 139 | * name in "dentry". |
| 140 | * |
| 141 | * Returns: errno |
| 142 | */ |
| 143 | |
| 144 | static int gfs2_link(struct dentry *old_dentry, struct inode *dir, |
| 145 | struct dentry *dentry) |
| 146 | { |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame^] | 147 | struct gfs2_inode *dip = dir->u.generic_ip; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 148 | struct gfs2_sbd *sdp = dip->i_sbd; |
| 149 | struct inode *inode = old_dentry->d_inode; |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame^] | 150 | struct gfs2_inode *ip = inode->u.generic_ip; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 151 | struct gfs2_holder ghs[2]; |
| 152 | int alloc_required; |
| 153 | int error; |
| 154 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 155 | if (S_ISDIR(ip->i_di.di_mode)) |
| 156 | return -EPERM; |
| 157 | |
| 158 | gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); |
| 159 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); |
| 160 | |
| 161 | error = gfs2_glock_nq_m(2, ghs); |
| 162 | if (error) |
| 163 | goto out; |
| 164 | |
| 165 | error = gfs2_repermission(dir, MAY_WRITE | MAY_EXEC, NULL); |
| 166 | if (error) |
| 167 | goto out_gunlock; |
| 168 | |
| 169 | error = gfs2_dir_search(dip, &dentry->d_name, NULL, NULL); |
| 170 | switch (error) { |
| 171 | case -ENOENT: |
| 172 | break; |
| 173 | case 0: |
| 174 | error = -EEXIST; |
| 175 | default: |
| 176 | goto out_gunlock; |
| 177 | } |
| 178 | |
| 179 | error = -EINVAL; |
| 180 | if (!dip->i_di.di_nlink) |
| 181 | goto out_gunlock; |
| 182 | error = -EFBIG; |
| 183 | if (dip->i_di.di_entries == (uint32_t)-1) |
| 184 | goto out_gunlock; |
| 185 | error = -EPERM; |
| 186 | if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) |
| 187 | goto out_gunlock; |
| 188 | error = -EINVAL; |
| 189 | if (!ip->i_di.di_nlink) |
| 190 | goto out_gunlock; |
| 191 | error = -EMLINK; |
| 192 | if (ip->i_di.di_nlink == (uint32_t)-1) |
| 193 | goto out_gunlock; |
| 194 | |
| 195 | error = gfs2_diradd_alloc_required(dip, &dentry->d_name, |
| 196 | &alloc_required); |
| 197 | if (error) |
| 198 | goto out_gunlock; |
| 199 | |
| 200 | if (alloc_required) { |
| 201 | struct gfs2_alloc *al = gfs2_alloc_get(dip); |
| 202 | |
| 203 | error = gfs2_quota_lock(dip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE); |
| 204 | if (error) |
| 205 | goto out_alloc; |
| 206 | |
| 207 | error = gfs2_quota_check(dip, dip->i_di.di_uid, |
| 208 | dip->i_di.di_gid); |
| 209 | if (error) |
| 210 | goto out_gunlock_q; |
| 211 | |
| 212 | al->al_requested = sdp->sd_max_dirres; |
| 213 | |
| 214 | error = gfs2_inplace_reserve(dip); |
| 215 | if (error) |
| 216 | goto out_gunlock_q; |
| 217 | |
| 218 | error = gfs2_trans_begin(sdp, |
| 219 | sdp->sd_max_dirres + |
| 220 | al->al_rgd->rd_ri.ri_length + |
| 221 | 2 * RES_DINODE + RES_STATFS + |
| 222 | RES_QUOTA, 0); |
| 223 | if (error) |
| 224 | goto out_ipres; |
| 225 | } else { |
| 226 | error = gfs2_trans_begin(sdp, 2 * RES_DINODE + RES_LEAF, 0); |
| 227 | if (error) |
| 228 | goto out_ipres; |
| 229 | } |
| 230 | |
| 231 | error = gfs2_dir_add(dip, &dentry->d_name, &ip->i_num, |
| 232 | IF2DT(ip->i_di.di_mode)); |
| 233 | if (error) |
| 234 | goto out_end_trans; |
| 235 | |
| 236 | error = gfs2_change_nlink(ip, +1); |
| 237 | |
| 238 | out_end_trans: |
| 239 | gfs2_trans_end(sdp); |
| 240 | |
| 241 | out_ipres: |
| 242 | if (alloc_required) |
| 243 | gfs2_inplace_release(dip); |
| 244 | |
| 245 | out_gunlock_q: |
| 246 | if (alloc_required) |
| 247 | gfs2_quota_unlock(dip); |
| 248 | |
| 249 | out_alloc: |
| 250 | if (alloc_required) |
| 251 | gfs2_alloc_put(dip); |
| 252 | |
| 253 | out_gunlock: |
| 254 | gfs2_glock_dq_m(2, ghs); |
| 255 | |
| 256 | out: |
| 257 | gfs2_holder_uninit(ghs); |
| 258 | gfs2_holder_uninit(ghs + 1); |
| 259 | |
| 260 | if (!error) { |
| 261 | atomic_inc(&inode->i_count); |
| 262 | d_instantiate(dentry, inode); |
| 263 | mark_inode_dirty(inode); |
| 264 | } |
| 265 | |
| 266 | return error; |
| 267 | } |
| 268 | |
| 269 | /** |
| 270 | * gfs2_unlink - Unlink a file |
| 271 | * @dir: The inode of the directory containing the file to unlink |
| 272 | * @dentry: The file itself |
| 273 | * |
| 274 | * Unlink a file. Call gfs2_unlinki() |
| 275 | * |
| 276 | * Returns: errno |
| 277 | */ |
| 278 | |
| 279 | static int gfs2_unlink(struct inode *dir, struct dentry *dentry) |
| 280 | { |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame^] | 281 | struct gfs2_inode *dip = dir->u.generic_ip; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 282 | struct gfs2_sbd *sdp = dip->i_sbd; |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame^] | 283 | struct gfs2_inode *ip = dentry->d_inode->u.generic_ip; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 284 | struct gfs2_unlinked *ul; |
| 285 | struct gfs2_holder ghs[2]; |
| 286 | int error; |
| 287 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 288 | error = gfs2_unlinked_get(sdp, &ul); |
| 289 | if (error) |
| 290 | return error; |
| 291 | |
| 292 | gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); |
| 293 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); |
| 294 | |
| 295 | error = gfs2_glock_nq_m(2, ghs); |
| 296 | if (error) |
| 297 | goto out; |
| 298 | |
| 299 | error = gfs2_unlink_ok(dip, &dentry->d_name, ip); |
| 300 | if (error) |
| 301 | goto out_gunlock; |
| 302 | |
| 303 | error = gfs2_trans_begin(sdp, 2 * RES_DINODE + RES_LEAF + |
| 304 | RES_UNLINKED, 0); |
| 305 | if (error) |
| 306 | goto out_gunlock; |
| 307 | |
| 308 | error = gfs2_unlinki(dip, &dentry->d_name, ip,ul); |
| 309 | |
| 310 | gfs2_trans_end(sdp); |
| 311 | |
| 312 | out_gunlock: |
| 313 | gfs2_glock_dq_m(2, ghs); |
| 314 | |
| 315 | out: |
| 316 | gfs2_holder_uninit(ghs); |
| 317 | gfs2_holder_uninit(ghs + 1); |
| 318 | |
| 319 | gfs2_unlinked_put(sdp, ul); |
| 320 | |
| 321 | return error; |
| 322 | } |
| 323 | |
| 324 | /** |
| 325 | * gfs2_symlink - Create a symlink |
| 326 | * @dir: The directory to create the symlink in |
| 327 | * @dentry: The dentry to put the symlink in |
| 328 | * @symname: The thing which the link points to |
| 329 | * |
| 330 | * Returns: errno |
| 331 | */ |
| 332 | |
| 333 | static int gfs2_symlink(struct inode *dir, struct dentry *dentry, |
| 334 | const char *symname) |
| 335 | { |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame^] | 336 | struct gfs2_inode *dip = dir->u.generic_ip, *ip; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 337 | struct gfs2_sbd *sdp = dip->i_sbd; |
| 338 | struct gfs2_holder ghs[2]; |
| 339 | struct inode *inode; |
| 340 | struct buffer_head *dibh; |
| 341 | int size; |
| 342 | int error; |
| 343 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 344 | /* Must be stuffed with a null terminator for gfs2_follow_link() */ |
| 345 | size = strlen(symname); |
| 346 | if (size > sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode) - 1) |
| 347 | return -ENAMETOOLONG; |
| 348 | |
| 349 | gfs2_holder_init(dip->i_gl, 0, 0, ghs); |
| 350 | |
Steven Whitehouse | 7359a19 | 2006-02-13 12:27:43 +0000 | [diff] [blame] | 351 | inode = gfs2_createi(ghs, &dentry->d_name, S_IFLNK | S_IRWXUGO); |
| 352 | if (IS_ERR(inode)) { |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 353 | gfs2_holder_uninit(ghs); |
Steven Whitehouse | 7359a19 | 2006-02-13 12:27:43 +0000 | [diff] [blame] | 354 | return PTR_ERR(inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 355 | } |
| 356 | |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame^] | 357 | ip = ghs[1].gh_gl->gl_object; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 358 | |
| 359 | ip->i_di.di_size = size; |
| 360 | |
| 361 | error = gfs2_meta_inode_buffer(ip, &dibh); |
| 362 | |
| 363 | if (!gfs2_assert_withdraw(sdp, !error)) { |
| 364 | gfs2_dinode_out(&ip->i_di, dibh->b_data); |
| 365 | memcpy(dibh->b_data + sizeof(struct gfs2_dinode), symname, |
| 366 | size); |
| 367 | brelse(dibh); |
| 368 | } |
| 369 | |
| 370 | gfs2_trans_end(sdp); |
| 371 | if (dip->i_alloc.al_rgd) |
| 372 | gfs2_inplace_release(dip); |
| 373 | gfs2_quota_unlock(dip); |
| 374 | gfs2_alloc_put(dip); |
| 375 | |
| 376 | gfs2_glock_dq_uninit_m(2, ghs); |
| 377 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 378 | d_instantiate(dentry, inode); |
| 379 | mark_inode_dirty(inode); |
| 380 | |
| 381 | return 0; |
| 382 | } |
| 383 | |
| 384 | /** |
| 385 | * gfs2_mkdir - Make a directory |
| 386 | * @dir: The parent directory of the new one |
| 387 | * @dentry: The dentry of the new directory |
| 388 | * @mode: The mode of the new directory |
| 389 | * |
| 390 | * Returns: errno |
| 391 | */ |
| 392 | |
| 393 | static int gfs2_mkdir(struct inode *dir, struct dentry *dentry, int mode) |
| 394 | { |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame^] | 395 | struct gfs2_inode *dip = dir->u.generic_ip, *ip; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 396 | struct gfs2_sbd *sdp = dip->i_sbd; |
| 397 | struct gfs2_holder ghs[2]; |
| 398 | struct inode *inode; |
| 399 | struct buffer_head *dibh; |
| 400 | int error; |
| 401 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 402 | gfs2_holder_init(dip->i_gl, 0, 0, ghs); |
| 403 | |
Steven Whitehouse | 7359a19 | 2006-02-13 12:27:43 +0000 | [diff] [blame] | 404 | inode = gfs2_createi(ghs, &dentry->d_name, S_IFDIR | mode); |
| 405 | if (IS_ERR(inode)) { |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 406 | gfs2_holder_uninit(ghs); |
Steven Whitehouse | 7359a19 | 2006-02-13 12:27:43 +0000 | [diff] [blame] | 407 | return PTR_ERR(inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 408 | } |
| 409 | |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame^] | 410 | ip = ghs[1].gh_gl->gl_object; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 411 | |
| 412 | ip->i_di.di_nlink = 2; |
| 413 | ip->i_di.di_size = sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode); |
| 414 | ip->i_di.di_flags |= GFS2_DIF_JDATA; |
| 415 | ip->i_di.di_payload_format = GFS2_FORMAT_DE; |
| 416 | ip->i_di.di_entries = 2; |
| 417 | |
| 418 | error = gfs2_meta_inode_buffer(ip, &dibh); |
| 419 | |
| 420 | if (!gfs2_assert_withdraw(sdp, !error)) { |
| 421 | struct gfs2_dinode *di = (struct gfs2_dinode *)dibh->b_data; |
| 422 | struct gfs2_dirent *dent; |
| 423 | |
| 424 | gfs2_dirent_alloc(ip, dibh, 1, &dent); |
| 425 | |
| 426 | dent->de_inum = di->di_num; /* already GFS2 endian */ |
| 427 | dent->de_hash = gfs2_disk_hash(".", 1); |
| 428 | dent->de_hash = cpu_to_be32(dent->de_hash); |
| 429 | dent->de_type = DT_DIR; |
| 430 | memcpy((char *) (dent + 1), ".", 1); |
| 431 | di->di_entries = cpu_to_be32(1); |
| 432 | |
| 433 | gfs2_dirent_alloc(ip, dibh, 2, &dent); |
| 434 | |
| 435 | gfs2_inum_out(&dip->i_num, (char *) &dent->de_inum); |
| 436 | dent->de_hash = gfs2_disk_hash("..", 2); |
| 437 | dent->de_hash = cpu_to_be32(dent->de_hash); |
| 438 | dent->de_type = DT_DIR; |
| 439 | memcpy((char *) (dent + 1), "..", 2); |
| 440 | |
| 441 | gfs2_dinode_out(&ip->i_di, (char *)di); |
| 442 | |
| 443 | brelse(dibh); |
| 444 | } |
| 445 | |
| 446 | error = gfs2_change_nlink(dip, +1); |
| 447 | gfs2_assert_withdraw(sdp, !error); /* dip already pinned */ |
| 448 | |
| 449 | gfs2_trans_end(sdp); |
| 450 | if (dip->i_alloc.al_rgd) |
| 451 | gfs2_inplace_release(dip); |
| 452 | gfs2_quota_unlock(dip); |
| 453 | gfs2_alloc_put(dip); |
| 454 | |
| 455 | gfs2_glock_dq_uninit_m(2, ghs); |
| 456 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 457 | d_instantiate(dentry, inode); |
| 458 | mark_inode_dirty(inode); |
| 459 | |
| 460 | return 0; |
| 461 | } |
| 462 | |
| 463 | /** |
| 464 | * gfs2_rmdir - Remove a directory |
| 465 | * @dir: The parent directory of the directory to be removed |
| 466 | * @dentry: The dentry of the directory to remove |
| 467 | * |
| 468 | * Remove a directory. Call gfs2_rmdiri() |
| 469 | * |
| 470 | * Returns: errno |
| 471 | */ |
| 472 | |
| 473 | static int gfs2_rmdir(struct inode *dir, struct dentry *dentry) |
| 474 | { |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame^] | 475 | struct gfs2_inode *dip = dir->u.generic_ip; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 476 | struct gfs2_sbd *sdp = dip->i_sbd; |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame^] | 477 | struct gfs2_inode *ip = dentry->d_inode->u.generic_ip; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 478 | struct gfs2_unlinked *ul; |
| 479 | struct gfs2_holder ghs[2]; |
| 480 | int error; |
| 481 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 482 | error = gfs2_unlinked_get(sdp, &ul); |
| 483 | if (error) |
| 484 | return error; |
| 485 | |
| 486 | gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); |
| 487 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); |
| 488 | |
| 489 | error = gfs2_glock_nq_m(2, ghs); |
| 490 | if (error) |
| 491 | goto out; |
| 492 | |
| 493 | error = gfs2_unlink_ok(dip, &dentry->d_name, ip); |
| 494 | if (error) |
| 495 | goto out_gunlock; |
| 496 | |
| 497 | if (ip->i_di.di_entries < 2) { |
| 498 | if (gfs2_consist_inode(ip)) |
| 499 | gfs2_dinode_print(&ip->i_di); |
| 500 | error = -EIO; |
| 501 | goto out_gunlock; |
| 502 | } |
| 503 | if (ip->i_di.di_entries > 2) { |
| 504 | error = -ENOTEMPTY; |
| 505 | goto out_gunlock; |
| 506 | } |
| 507 | |
| 508 | error = gfs2_trans_begin(sdp, 2 * RES_DINODE + 3 * RES_LEAF + |
| 509 | RES_UNLINKED, 0); |
| 510 | if (error) |
| 511 | goto out_gunlock; |
| 512 | |
| 513 | error = gfs2_rmdiri(dip, &dentry->d_name, ip, ul); |
| 514 | |
| 515 | gfs2_trans_end(sdp); |
| 516 | |
| 517 | out_gunlock: |
| 518 | gfs2_glock_dq_m(2, ghs); |
| 519 | |
| 520 | out: |
| 521 | gfs2_holder_uninit(ghs); |
| 522 | gfs2_holder_uninit(ghs + 1); |
| 523 | |
| 524 | gfs2_unlinked_put(sdp, ul); |
| 525 | |
| 526 | return error; |
| 527 | } |
| 528 | |
| 529 | /** |
| 530 | * gfs2_mknod - Make a special file |
| 531 | * @dir: The directory in which the special file will reside |
| 532 | * @dentry: The dentry of the special file |
| 533 | * @mode: The mode of the special file |
| 534 | * @rdev: The device specification of the special file |
| 535 | * |
| 536 | */ |
| 537 | |
| 538 | static int gfs2_mknod(struct inode *dir, struct dentry *dentry, int mode, |
| 539 | dev_t dev) |
| 540 | { |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame^] | 541 | struct gfs2_inode *dip = dir->u.generic_ip, *ip; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 542 | struct gfs2_sbd *sdp = dip->i_sbd; |
| 543 | struct gfs2_holder ghs[2]; |
| 544 | struct inode *inode; |
| 545 | struct buffer_head *dibh; |
| 546 | uint32_t major = 0, minor = 0; |
| 547 | int error; |
| 548 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 549 | switch (mode & S_IFMT) { |
| 550 | case S_IFBLK: |
| 551 | case S_IFCHR: |
| 552 | major = MAJOR(dev); |
| 553 | minor = MINOR(dev); |
| 554 | break; |
| 555 | case S_IFIFO: |
| 556 | case S_IFSOCK: |
| 557 | break; |
| 558 | default: |
| 559 | return -EOPNOTSUPP; |
| 560 | }; |
| 561 | |
| 562 | gfs2_holder_init(dip->i_gl, 0, 0, ghs); |
| 563 | |
Steven Whitehouse | 7359a19 | 2006-02-13 12:27:43 +0000 | [diff] [blame] | 564 | inode = gfs2_createi(ghs, &dentry->d_name, mode); |
| 565 | if (IS_ERR(inode)) { |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 566 | gfs2_holder_uninit(ghs); |
Steven Whitehouse | 7359a19 | 2006-02-13 12:27:43 +0000 | [diff] [blame] | 567 | return PTR_ERR(inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 568 | } |
| 569 | |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame^] | 570 | ip = ghs[1].gh_gl->gl_object; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 571 | |
| 572 | ip->i_di.di_major = major; |
| 573 | ip->i_di.di_minor = minor; |
| 574 | |
| 575 | error = gfs2_meta_inode_buffer(ip, &dibh); |
| 576 | |
| 577 | if (!gfs2_assert_withdraw(sdp, !error)) { |
| 578 | gfs2_dinode_out(&ip->i_di, dibh->b_data); |
| 579 | brelse(dibh); |
| 580 | } |
| 581 | |
| 582 | gfs2_trans_end(sdp); |
| 583 | if (dip->i_alloc.al_rgd) |
| 584 | gfs2_inplace_release(dip); |
| 585 | gfs2_quota_unlock(dip); |
| 586 | gfs2_alloc_put(dip); |
| 587 | |
| 588 | gfs2_glock_dq_uninit_m(2, ghs); |
| 589 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 590 | d_instantiate(dentry, inode); |
| 591 | mark_inode_dirty(inode); |
| 592 | |
| 593 | return 0; |
| 594 | } |
| 595 | |
| 596 | /** |
| 597 | * gfs2_rename - Rename a file |
| 598 | * @odir: Parent directory of old file name |
| 599 | * @odentry: The old dentry of the file |
| 600 | * @ndir: Parent directory of new file name |
| 601 | * @ndentry: The new dentry of the file |
| 602 | * |
| 603 | * Returns: errno |
| 604 | */ |
| 605 | |
| 606 | static int gfs2_rename(struct inode *odir, struct dentry *odentry, |
| 607 | struct inode *ndir, struct dentry *ndentry) |
| 608 | { |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame^] | 609 | struct gfs2_inode *odip = odir->u.generic_ip; |
| 610 | struct gfs2_inode *ndip = ndir->u.generic_ip; |
| 611 | struct gfs2_inode *ip = odentry->d_inode->u.generic_ip; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 612 | struct gfs2_inode *nip = NULL; |
| 613 | struct gfs2_sbd *sdp = odip->i_sbd; |
| 614 | struct gfs2_unlinked *ul; |
| 615 | struct gfs2_holder ghs[4], r_gh; |
| 616 | unsigned int num_gh; |
| 617 | int dir_rename = 0; |
| 618 | int alloc_required; |
| 619 | unsigned int x; |
| 620 | int error; |
| 621 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 622 | if (ndentry->d_inode) { |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame^] | 623 | nip = ndentry->d_inode->u.generic_ip; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 624 | if (ip == nip) |
| 625 | return 0; |
| 626 | } |
| 627 | |
| 628 | error = gfs2_unlinked_get(sdp, &ul); |
| 629 | if (error) |
| 630 | return error; |
| 631 | |
| 632 | /* Make sure we aren't trying to move a dirctory into it's subdir */ |
| 633 | |
| 634 | if (S_ISDIR(ip->i_di.di_mode) && odip != ndip) { |
| 635 | dir_rename = 1; |
| 636 | |
| 637 | error = gfs2_glock_nq_init(sdp->sd_rename_gl, |
| 638 | LM_ST_EXCLUSIVE, 0, |
| 639 | &r_gh); |
| 640 | if (error) |
| 641 | goto out; |
| 642 | |
| 643 | error = gfs2_ok_to_move(ip, ndip); |
| 644 | if (error) |
| 645 | goto out_gunlock_r; |
| 646 | } |
| 647 | |
| 648 | gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); |
| 649 | gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); |
| 650 | gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 2); |
| 651 | num_gh = 3; |
| 652 | |
| 653 | if (nip) |
| 654 | gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + num_gh++); |
| 655 | |
| 656 | error = gfs2_glock_nq_m(num_gh, ghs); |
| 657 | if (error) |
| 658 | goto out_uninit; |
| 659 | |
| 660 | /* Check out the old directory */ |
| 661 | |
| 662 | error = gfs2_unlink_ok(odip, &odentry->d_name, ip); |
| 663 | if (error) |
| 664 | goto out_gunlock; |
| 665 | |
| 666 | /* Check out the new directory */ |
| 667 | |
| 668 | if (nip) { |
| 669 | error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip); |
| 670 | if (error) |
| 671 | goto out_gunlock; |
| 672 | |
| 673 | if (S_ISDIR(nip->i_di.di_mode)) { |
| 674 | if (nip->i_di.di_entries < 2) { |
| 675 | if (gfs2_consist_inode(nip)) |
| 676 | gfs2_dinode_print(&nip->i_di); |
| 677 | error = -EIO; |
| 678 | goto out_gunlock; |
| 679 | } |
| 680 | if (nip->i_di.di_entries > 2) { |
| 681 | error = -ENOTEMPTY; |
| 682 | goto out_gunlock; |
| 683 | } |
| 684 | } |
| 685 | } else { |
| 686 | error = gfs2_repermission(ndir, MAY_WRITE | MAY_EXEC, NULL); |
| 687 | if (error) |
| 688 | goto out_gunlock; |
| 689 | |
| 690 | error = gfs2_dir_search(ndip, &ndentry->d_name, NULL, NULL); |
| 691 | switch (error) { |
| 692 | case -ENOENT: |
| 693 | error = 0; |
| 694 | break; |
| 695 | case 0: |
| 696 | error = -EEXIST; |
| 697 | default: |
| 698 | goto out_gunlock; |
| 699 | }; |
| 700 | |
| 701 | if (odip != ndip) { |
| 702 | if (!ndip->i_di.di_nlink) { |
| 703 | error = -EINVAL; |
| 704 | goto out_gunlock; |
| 705 | } |
| 706 | if (ndip->i_di.di_entries == (uint32_t)-1) { |
| 707 | error = -EFBIG; |
| 708 | goto out_gunlock; |
| 709 | } |
| 710 | if (S_ISDIR(ip->i_di.di_mode) && |
| 711 | ndip->i_di.di_nlink == (uint32_t)-1) { |
| 712 | error = -EMLINK; |
| 713 | goto out_gunlock; |
| 714 | } |
| 715 | } |
| 716 | } |
| 717 | |
| 718 | /* Check out the dir to be renamed */ |
| 719 | |
| 720 | if (dir_rename) { |
| 721 | error = gfs2_repermission(odentry->d_inode, MAY_WRITE, NULL); |
| 722 | if (error) |
| 723 | goto out_gunlock; |
| 724 | } |
| 725 | |
| 726 | error = gfs2_diradd_alloc_required(ndip, &ndentry->d_name, |
| 727 | &alloc_required); |
| 728 | if (error) |
| 729 | goto out_gunlock; |
| 730 | |
| 731 | if (alloc_required) { |
| 732 | struct gfs2_alloc *al = gfs2_alloc_get(ndip); |
| 733 | |
| 734 | error = gfs2_quota_lock(ndip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE); |
| 735 | if (error) |
| 736 | goto out_alloc; |
| 737 | |
| 738 | error = gfs2_quota_check(ndip, ndip->i_di.di_uid, |
| 739 | ndip->i_di.di_gid); |
| 740 | if (error) |
| 741 | goto out_gunlock_q; |
| 742 | |
| 743 | al->al_requested = sdp->sd_max_dirres; |
| 744 | |
| 745 | error = gfs2_inplace_reserve(ndip); |
| 746 | if (error) |
| 747 | goto out_gunlock_q; |
| 748 | |
| 749 | error = gfs2_trans_begin(sdp, |
| 750 | sdp->sd_max_dirres + |
| 751 | al->al_rgd->rd_ri.ri_length + |
| 752 | 4 * RES_DINODE + 4 * RES_LEAF + |
| 753 | RES_UNLINKED + RES_STATFS + |
| 754 | RES_QUOTA, 0); |
| 755 | if (error) |
| 756 | goto out_ipreserv; |
| 757 | } else { |
| 758 | error = gfs2_trans_begin(sdp, 4 * RES_DINODE + |
| 759 | 5 * RES_LEAF + |
| 760 | RES_UNLINKED, 0); |
| 761 | if (error) |
| 762 | goto out_gunlock; |
| 763 | } |
| 764 | |
| 765 | /* Remove the target file, if it exists */ |
| 766 | |
| 767 | if (nip) { |
| 768 | if (S_ISDIR(nip->i_di.di_mode)) |
| 769 | error = gfs2_rmdiri(ndip, &ndentry->d_name, nip, ul); |
| 770 | else |
| 771 | error = gfs2_unlinki(ndip, &ndentry->d_name, nip, ul); |
| 772 | if (error) |
| 773 | goto out_end_trans; |
| 774 | } |
| 775 | |
| 776 | if (dir_rename) { |
| 777 | struct qstr name; |
| 778 | name.len = 2; |
| 779 | name.name = ".."; |
| 780 | |
| 781 | error = gfs2_change_nlink(ndip, +1); |
| 782 | if (error) |
| 783 | goto out_end_trans; |
| 784 | error = gfs2_change_nlink(odip, -1); |
| 785 | if (error) |
| 786 | goto out_end_trans; |
| 787 | |
| 788 | error = gfs2_dir_mvino(ip, &name, &ndip->i_num, DT_DIR); |
| 789 | if (error) |
| 790 | goto out_end_trans; |
| 791 | } else { |
| 792 | struct buffer_head *dibh; |
| 793 | error = gfs2_meta_inode_buffer(ip, &dibh); |
| 794 | if (error) |
| 795 | goto out_end_trans; |
| 796 | ip->i_di.di_ctime = get_seconds(); |
Steven Whitehouse | d4e9c4c | 2006-01-18 11:19:28 +0000 | [diff] [blame] | 797 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 798 | gfs2_dinode_out(&ip->i_di, dibh->b_data); |
| 799 | brelse(dibh); |
| 800 | } |
| 801 | |
| 802 | error = gfs2_dir_del(odip, &odentry->d_name); |
| 803 | if (error) |
| 804 | goto out_end_trans; |
| 805 | |
| 806 | error = gfs2_dir_add(ndip, &ndentry->d_name, &ip->i_num, |
| 807 | IF2DT(ip->i_di.di_mode)); |
| 808 | if (error) |
| 809 | goto out_end_trans; |
| 810 | |
| 811 | out_end_trans: |
| 812 | gfs2_trans_end(sdp); |
| 813 | |
| 814 | out_ipreserv: |
| 815 | if (alloc_required) |
| 816 | gfs2_inplace_release(ndip); |
| 817 | |
| 818 | out_gunlock_q: |
| 819 | if (alloc_required) |
| 820 | gfs2_quota_unlock(ndip); |
| 821 | |
| 822 | out_alloc: |
| 823 | if (alloc_required) |
| 824 | gfs2_alloc_put(ndip); |
| 825 | |
| 826 | out_gunlock: |
| 827 | gfs2_glock_dq_m(num_gh, ghs); |
| 828 | |
| 829 | out_uninit: |
| 830 | for (x = 0; x < num_gh; x++) |
| 831 | gfs2_holder_uninit(ghs + x); |
| 832 | |
| 833 | out_gunlock_r: |
| 834 | if (dir_rename) |
| 835 | gfs2_glock_dq_uninit(&r_gh); |
| 836 | |
| 837 | out: |
| 838 | gfs2_unlinked_put(sdp, ul); |
| 839 | |
| 840 | return error; |
| 841 | } |
| 842 | |
| 843 | /** |
| 844 | * gfs2_readlink - Read the value of a symlink |
| 845 | * @dentry: the symlink |
| 846 | * @buf: the buffer to read the symlink data into |
| 847 | * @size: the size of the buffer |
| 848 | * |
| 849 | * Returns: errno |
| 850 | */ |
| 851 | |
| 852 | static int gfs2_readlink(struct dentry *dentry, char __user *user_buf, |
| 853 | int user_size) |
| 854 | { |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame^] | 855 | struct gfs2_inode *ip = dentry->d_inode->u.generic_ip; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 856 | char array[GFS2_FAST_NAME_SIZE], *buf = array; |
| 857 | unsigned int len = GFS2_FAST_NAME_SIZE; |
| 858 | int error; |
| 859 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 860 | error = gfs2_readlinki(ip, &buf, &len); |
| 861 | if (error) |
| 862 | return error; |
| 863 | |
| 864 | if (user_size > len - 1) |
| 865 | user_size = len - 1; |
| 866 | |
| 867 | if (copy_to_user(user_buf, buf, user_size)) |
| 868 | error = -EFAULT; |
| 869 | else |
| 870 | error = user_size; |
| 871 | |
| 872 | if (buf != array) |
| 873 | kfree(buf); |
| 874 | |
| 875 | return error; |
| 876 | } |
| 877 | |
| 878 | /** |
| 879 | * gfs2_follow_link - Follow a symbolic link |
| 880 | * @dentry: The dentry of the link |
| 881 | * @nd: Data that we pass to vfs_follow_link() |
| 882 | * |
| 883 | * This can handle symlinks of any size. It is optimised for symlinks |
| 884 | * under GFS2_FAST_NAME_SIZE. |
| 885 | * |
| 886 | * Returns: 0 on success or error code |
| 887 | */ |
| 888 | |
| 889 | static void *gfs2_follow_link(struct dentry *dentry, struct nameidata *nd) |
| 890 | { |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame^] | 891 | struct gfs2_inode *ip = dentry->d_inode->u.generic_ip; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 892 | char array[GFS2_FAST_NAME_SIZE], *buf = array; |
| 893 | unsigned int len = GFS2_FAST_NAME_SIZE; |
| 894 | int error; |
| 895 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 896 | error = gfs2_readlinki(ip, &buf, &len); |
| 897 | if (!error) { |
| 898 | error = vfs_follow_link(nd, buf); |
| 899 | if (buf != array) |
| 900 | kfree(buf); |
| 901 | } |
| 902 | |
| 903 | return ERR_PTR(error); |
| 904 | } |
| 905 | |
| 906 | /** |
| 907 | * gfs2_permission - |
| 908 | * @inode: |
| 909 | * @mask: |
| 910 | * @nd: passed from Linux VFS, ignored by us |
| 911 | * |
| 912 | * Returns: errno |
| 913 | */ |
| 914 | |
| 915 | static int gfs2_permission(struct inode *inode, int mask, struct nameidata *nd) |
| 916 | { |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame^] | 917 | struct gfs2_inode *ip = inode->u.generic_ip; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 918 | struct gfs2_holder i_gh; |
| 919 | int error; |
| 920 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 921 | if (ip->i_vn == ip->i_gl->gl_vn) |
| 922 | return generic_permission(inode, mask, gfs2_check_acl); |
| 923 | |
| 924 | error = gfs2_glock_nq_init(ip->i_gl, |
| 925 | LM_ST_SHARED, LM_FLAG_ANY, |
| 926 | &i_gh); |
| 927 | if (!error) { |
| 928 | error = generic_permission(inode, mask, gfs2_check_acl_locked); |
| 929 | gfs2_glock_dq_uninit(&i_gh); |
| 930 | } |
| 931 | |
| 932 | return error; |
| 933 | } |
| 934 | |
| 935 | static int setattr_size(struct inode *inode, struct iattr *attr) |
| 936 | { |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame^] | 937 | struct gfs2_inode *ip = inode->u.generic_ip; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 938 | int error; |
| 939 | |
| 940 | if (attr->ia_size != ip->i_di.di_size) { |
| 941 | error = vmtruncate(inode, attr->ia_size); |
| 942 | if (error) |
| 943 | return error; |
| 944 | } |
| 945 | |
Steven Whitehouse | aa6a85a | 2006-01-24 10:37:06 +0000 | [diff] [blame] | 946 | error = gfs2_truncatei(ip, attr->ia_size); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 947 | if (error) |
| 948 | return error; |
| 949 | |
| 950 | return error; |
| 951 | } |
| 952 | |
| 953 | static int setattr_chown(struct inode *inode, struct iattr *attr) |
| 954 | { |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame^] | 955 | struct gfs2_inode *ip = inode->u.generic_ip; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 956 | struct gfs2_sbd *sdp = ip->i_sbd; |
| 957 | struct buffer_head *dibh; |
| 958 | uint32_t ouid, ogid, nuid, ngid; |
| 959 | int error; |
| 960 | |
| 961 | ouid = ip->i_di.di_uid; |
| 962 | ogid = ip->i_di.di_gid; |
| 963 | nuid = attr->ia_uid; |
| 964 | ngid = attr->ia_gid; |
| 965 | |
| 966 | if (!(attr->ia_valid & ATTR_UID) || ouid == nuid) |
| 967 | ouid = nuid = NO_QUOTA_CHANGE; |
| 968 | if (!(attr->ia_valid & ATTR_GID) || ogid == ngid) |
| 969 | ogid = ngid = NO_QUOTA_CHANGE; |
| 970 | |
| 971 | gfs2_alloc_get(ip); |
| 972 | |
| 973 | error = gfs2_quota_lock(ip, nuid, ngid); |
| 974 | if (error) |
| 975 | goto out_alloc; |
| 976 | |
| 977 | if (ouid != NO_QUOTA_CHANGE || ogid != NO_QUOTA_CHANGE) { |
| 978 | error = gfs2_quota_check(ip, nuid, ngid); |
| 979 | if (error) |
| 980 | goto out_gunlock_q; |
| 981 | } |
| 982 | |
| 983 | error = gfs2_trans_begin(sdp, RES_DINODE + 2 * RES_QUOTA, 0); |
| 984 | if (error) |
| 985 | goto out_gunlock_q; |
| 986 | |
| 987 | error = gfs2_meta_inode_buffer(ip, &dibh); |
| 988 | if (error) |
| 989 | goto out_end_trans; |
| 990 | |
| 991 | error = inode_setattr(inode, attr); |
| 992 | gfs2_assert_warn(sdp, !error); |
| 993 | gfs2_inode_attr_out(ip); |
| 994 | |
Steven Whitehouse | d4e9c4c | 2006-01-18 11:19:28 +0000 | [diff] [blame] | 995 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 996 | gfs2_dinode_out(&ip->i_di, dibh->b_data); |
| 997 | brelse(dibh); |
| 998 | |
| 999 | if (ouid != NO_QUOTA_CHANGE || ogid != NO_QUOTA_CHANGE) { |
| 1000 | gfs2_quota_change(ip, -ip->i_di.di_blocks, |
| 1001 | ouid, ogid); |
| 1002 | gfs2_quota_change(ip, ip->i_di.di_blocks, |
| 1003 | nuid, ngid); |
| 1004 | } |
| 1005 | |
| 1006 | out_end_trans: |
| 1007 | gfs2_trans_end(sdp); |
| 1008 | |
| 1009 | out_gunlock_q: |
| 1010 | gfs2_quota_unlock(ip); |
| 1011 | |
| 1012 | out_alloc: |
| 1013 | gfs2_alloc_put(ip); |
| 1014 | |
| 1015 | return error; |
| 1016 | } |
| 1017 | |
| 1018 | /** |
| 1019 | * gfs2_setattr - Change attributes on an inode |
| 1020 | * @dentry: The dentry which is changing |
| 1021 | * @attr: The structure describing the change |
| 1022 | * |
| 1023 | * The VFS layer wants to change one or more of an inodes attributes. Write |
| 1024 | * that change out to disk. |
| 1025 | * |
| 1026 | * Returns: errno |
| 1027 | */ |
| 1028 | |
| 1029 | static int gfs2_setattr(struct dentry *dentry, struct iattr *attr) |
| 1030 | { |
| 1031 | struct inode *inode = dentry->d_inode; |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame^] | 1032 | struct gfs2_inode *ip = inode->u.generic_ip; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1033 | struct gfs2_holder i_gh; |
| 1034 | int error; |
| 1035 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1036 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); |
| 1037 | if (error) |
| 1038 | return error; |
| 1039 | |
| 1040 | error = -EPERM; |
| 1041 | if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) |
| 1042 | goto out; |
| 1043 | |
| 1044 | error = inode_change_ok(inode, attr); |
| 1045 | if (error) |
| 1046 | goto out; |
| 1047 | |
| 1048 | if (attr->ia_valid & ATTR_SIZE) |
| 1049 | error = setattr_size(inode, attr); |
| 1050 | else if (attr->ia_valid & (ATTR_UID | ATTR_GID)) |
| 1051 | error = setattr_chown(inode, attr); |
| 1052 | else if ((attr->ia_valid & ATTR_MODE) && IS_POSIXACL(inode)) |
| 1053 | error = gfs2_acl_chmod(ip, attr); |
| 1054 | else |
| 1055 | error = gfs2_setattr_simple(ip, attr); |
| 1056 | |
| 1057 | out: |
| 1058 | gfs2_glock_dq_uninit(&i_gh); |
| 1059 | |
| 1060 | if (!error) |
| 1061 | mark_inode_dirty(inode); |
| 1062 | |
| 1063 | return error; |
| 1064 | } |
| 1065 | |
| 1066 | /** |
| 1067 | * gfs2_getattr - Read out an inode's attributes |
| 1068 | * @mnt: ? |
| 1069 | * @dentry: The dentry to stat |
| 1070 | * @stat: The inode's stats |
| 1071 | * |
| 1072 | * Returns: errno |
| 1073 | */ |
| 1074 | |
| 1075 | static int gfs2_getattr(struct vfsmount *mnt, struct dentry *dentry, |
| 1076 | struct kstat *stat) |
| 1077 | { |
| 1078 | struct inode *inode = dentry->d_inode; |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame^] | 1079 | struct gfs2_inode *ip = inode->u.generic_ip; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1080 | struct gfs2_holder gh; |
| 1081 | int error; |
| 1082 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1083 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); |
| 1084 | if (!error) { |
| 1085 | generic_fillattr(inode, stat); |
| 1086 | gfs2_glock_dq_uninit(&gh); |
| 1087 | } |
| 1088 | |
| 1089 | return error; |
| 1090 | } |
| 1091 | |
| 1092 | static int gfs2_setxattr(struct dentry *dentry, const char *name, |
| 1093 | const void *data, size_t size, int flags) |
| 1094 | { |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame^] | 1095 | struct gfs2_inode *ip = dentry->d_inode->u.generic_ip; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1096 | struct gfs2_ea_request er; |
| 1097 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1098 | memset(&er, 0, sizeof(struct gfs2_ea_request)); |
| 1099 | er.er_type = gfs2_ea_name2type(name, &er.er_name); |
| 1100 | if (er.er_type == GFS2_EATYPE_UNUSED) |
| 1101 | return -EOPNOTSUPP; |
| 1102 | er.er_data = (char *)data; |
| 1103 | er.er_name_len = strlen(er.er_name); |
| 1104 | er.er_data_len = size; |
| 1105 | er.er_flags = flags; |
| 1106 | |
| 1107 | gfs2_assert_warn(ip->i_sbd, !(er.er_flags & GFS2_ERF_MODE)); |
| 1108 | |
| 1109 | return gfs2_ea_set(ip, &er); |
| 1110 | } |
| 1111 | |
| 1112 | static ssize_t gfs2_getxattr(struct dentry *dentry, const char *name, |
| 1113 | void *data, size_t size) |
| 1114 | { |
| 1115 | struct gfs2_ea_request er; |
| 1116 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1117 | memset(&er, 0, sizeof(struct gfs2_ea_request)); |
| 1118 | er.er_type = gfs2_ea_name2type(name, &er.er_name); |
| 1119 | if (er.er_type == GFS2_EATYPE_UNUSED) |
| 1120 | return -EOPNOTSUPP; |
| 1121 | er.er_data = data; |
| 1122 | er.er_name_len = strlen(er.er_name); |
| 1123 | er.er_data_len = size; |
| 1124 | |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame^] | 1125 | return gfs2_ea_get(dentry->d_inode->u.generic_ip, &er); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1126 | } |
| 1127 | |
| 1128 | static ssize_t gfs2_listxattr(struct dentry *dentry, char *buffer, size_t size) |
| 1129 | { |
| 1130 | struct gfs2_ea_request er; |
| 1131 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1132 | memset(&er, 0, sizeof(struct gfs2_ea_request)); |
| 1133 | er.er_data = (size) ? buffer : NULL; |
| 1134 | er.er_data_len = size; |
| 1135 | |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame^] | 1136 | return gfs2_ea_list(dentry->d_inode->u.generic_ip, &er); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1137 | } |
| 1138 | |
| 1139 | static int gfs2_removexattr(struct dentry *dentry, const char *name) |
| 1140 | { |
| 1141 | struct gfs2_ea_request er; |
| 1142 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1143 | memset(&er, 0, sizeof(struct gfs2_ea_request)); |
| 1144 | er.er_type = gfs2_ea_name2type(name, &er.er_name); |
| 1145 | if (er.er_type == GFS2_EATYPE_UNUSED) |
| 1146 | return -EOPNOTSUPP; |
| 1147 | er.er_name_len = strlen(er.er_name); |
| 1148 | |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame^] | 1149 | return gfs2_ea_remove(dentry->d_inode->u.generic_ip, &er); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1150 | } |
| 1151 | |
| 1152 | struct inode_operations gfs2_file_iops = { |
| 1153 | .permission = gfs2_permission, |
| 1154 | .setattr = gfs2_setattr, |
| 1155 | .getattr = gfs2_getattr, |
| 1156 | .setxattr = gfs2_setxattr, |
| 1157 | .getxattr = gfs2_getxattr, |
| 1158 | .listxattr = gfs2_listxattr, |
| 1159 | .removexattr = gfs2_removexattr, |
| 1160 | }; |
| 1161 | |
| 1162 | struct inode_operations gfs2_dev_iops = { |
| 1163 | .permission = gfs2_permission, |
| 1164 | .setattr = gfs2_setattr, |
| 1165 | .getattr = gfs2_getattr, |
| 1166 | .setxattr = gfs2_setxattr, |
| 1167 | .getxattr = gfs2_getxattr, |
| 1168 | .listxattr = gfs2_listxattr, |
| 1169 | .removexattr = gfs2_removexattr, |
| 1170 | }; |
| 1171 | |
| 1172 | struct inode_operations gfs2_dir_iops = { |
| 1173 | .create = gfs2_create, |
| 1174 | .lookup = gfs2_lookup, |
| 1175 | .link = gfs2_link, |
| 1176 | .unlink = gfs2_unlink, |
| 1177 | .symlink = gfs2_symlink, |
| 1178 | .mkdir = gfs2_mkdir, |
| 1179 | .rmdir = gfs2_rmdir, |
| 1180 | .mknod = gfs2_mknod, |
| 1181 | .rename = gfs2_rename, |
| 1182 | .permission = gfs2_permission, |
| 1183 | .setattr = gfs2_setattr, |
| 1184 | .getattr = gfs2_getattr, |
| 1185 | .setxattr = gfs2_setxattr, |
| 1186 | .getxattr = gfs2_getxattr, |
| 1187 | .listxattr = gfs2_listxattr, |
| 1188 | .removexattr = gfs2_removexattr, |
| 1189 | }; |
| 1190 | |
| 1191 | struct inode_operations gfs2_symlink_iops = { |
| 1192 | .readlink = gfs2_readlink, |
| 1193 | .follow_link = gfs2_follow_link, |
| 1194 | .permission = gfs2_permission, |
| 1195 | .setattr = gfs2_setattr, |
| 1196 | .getattr = gfs2_getattr, |
| 1197 | .setxattr = gfs2_setxattr, |
| 1198 | .getxattr = gfs2_getxattr, |
| 1199 | .listxattr = gfs2_listxattr, |
| 1200 | .removexattr = gfs2_removexattr, |
| 1201 | }; |
| 1202 | |