Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) International Business Machines Corp., 2000-2004 |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License as published by |
| 6 | * the Free Software Foundation; either version 2 of the License, or |
| 7 | * (at your option) any later version. |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See |
| 12 | * the GNU General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, write to the Free Software |
| 16 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 17 | */ |
| 18 | |
| 19 | /* |
| 20 | * jfs_imap.c: inode allocation map manager |
| 21 | * |
| 22 | * Serialization: |
| 23 | * Each AG has a simple lock which is used to control the serialization of |
| 24 | * the AG level lists. This lock should be taken first whenever an AG |
| 25 | * level list will be modified or accessed. |
| 26 | * |
| 27 | * Each IAG is locked by obtaining the buffer for the IAG page. |
| 28 | * |
| 29 | * There is also a inode lock for the inode map inode. A read lock needs to |
| 30 | * be taken whenever an IAG is read from the map or the global level |
| 31 | * information is read. A write lock needs to be taken whenever the global |
| 32 | * level information is modified or an atomic operation needs to be used. |
| 33 | * |
| 34 | * If more than one IAG is read at one time, the read lock may not |
| 35 | * be given up until all of the IAG's are read. Otherwise, a deadlock |
| 36 | * may occur when trying to obtain the read lock while another thread |
| 37 | * holding the read lock is waiting on the IAG already being held. |
| 38 | * |
| 39 | * The control page of the inode map is read into memory by diMount(). |
| 40 | * Thereafter it should only be modified in memory and then it will be |
| 41 | * written out when the filesystem is unmounted by diUnmount(). |
| 42 | */ |
| 43 | |
| 44 | #include <linux/fs.h> |
| 45 | #include <linux/buffer_head.h> |
| 46 | #include <linux/pagemap.h> |
| 47 | #include <linux/quotaops.h> |
| 48 | |
| 49 | #include "jfs_incore.h" |
Dave Kleikamp | 1868f4a | 2005-05-04 15:29:35 -0500 | [diff] [blame] | 50 | #include "jfs_inode.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | #include "jfs_filsys.h" |
| 52 | #include "jfs_dinode.h" |
| 53 | #include "jfs_dmap.h" |
| 54 | #include "jfs_imap.h" |
| 55 | #include "jfs_metapage.h" |
| 56 | #include "jfs_superblock.h" |
| 57 | #include "jfs_debug.h" |
| 58 | |
| 59 | /* |
Dave Kleikamp | ac17b8b | 2005-10-03 15:32:11 -0500 | [diff] [blame^] | 60 | * __mark_inode_dirty expects inodes to be hashed. Since we don't want |
| 61 | * special inodes in the fileset inode space, we hash them to a dummy head |
| 62 | */ |
| 63 | static HLIST_HEAD(aggregate_hash); |
| 64 | |
| 65 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | * imap locks |
| 67 | */ |
| 68 | /* iag free list lock */ |
| 69 | #define IAGFREE_LOCK_INIT(imap) init_MUTEX(&imap->im_freelock) |
| 70 | #define IAGFREE_LOCK(imap) down(&imap->im_freelock) |
| 71 | #define IAGFREE_UNLOCK(imap) up(&imap->im_freelock) |
| 72 | |
| 73 | /* per ag iag list locks */ |
| 74 | #define AG_LOCK_INIT(imap,index) init_MUTEX(&(imap->im_aglock[index])) |
| 75 | #define AG_LOCK(imap,agno) down(&imap->im_aglock[agno]) |
| 76 | #define AG_UNLOCK(imap,agno) up(&imap->im_aglock[agno]) |
| 77 | |
| 78 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | * forward references |
| 80 | */ |
| 81 | static int diAllocAG(struct inomap *, int, boolean_t, struct inode *); |
| 82 | static int diAllocAny(struct inomap *, int, boolean_t, struct inode *); |
| 83 | static int diAllocBit(struct inomap *, struct iag *, int); |
| 84 | static int diAllocExt(struct inomap *, int, struct inode *); |
| 85 | static int diAllocIno(struct inomap *, int, struct inode *); |
| 86 | static int diFindFree(u32, int); |
| 87 | static int diNewExt(struct inomap *, struct iag *, int); |
| 88 | static int diNewIAG(struct inomap *, int *, int, struct metapage **); |
| 89 | static void duplicateIXtree(struct super_block *, s64, int, s64 *); |
| 90 | |
| 91 | static int diIAGRead(struct inomap * imap, int, struct metapage **); |
| 92 | static int copy_from_dinode(struct dinode *, struct inode *); |
| 93 | static void copy_to_dinode(struct dinode *, struct inode *); |
| 94 | |
| 95 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | * NAME: diMount() |
| 97 | * |
| 98 | * FUNCTION: initialize the incore inode map control structures for |
| 99 | * a fileset or aggregate init time. |
| 100 | * |
| 101 | * the inode map's control structure (dinomap) is |
| 102 | * brought in from disk and placed in virtual memory. |
| 103 | * |
| 104 | * PARAMETERS: |
| 105 | * ipimap - pointer to inode map inode for the aggregate or fileset. |
| 106 | * |
| 107 | * RETURN VALUES: |
| 108 | * 0 - success |
| 109 | * -ENOMEM - insufficient free virtual memory. |
| 110 | * -EIO - i/o error. |
| 111 | */ |
| 112 | int diMount(struct inode *ipimap) |
| 113 | { |
| 114 | struct inomap *imap; |
| 115 | struct metapage *mp; |
| 116 | int index; |
| 117 | struct dinomap_disk *dinom_le; |
| 118 | |
| 119 | /* |
| 120 | * allocate/initialize the in-memory inode map control structure |
| 121 | */ |
| 122 | /* allocate the in-memory inode map control structure. */ |
| 123 | imap = (struct inomap *) kmalloc(sizeof(struct inomap), GFP_KERNEL); |
| 124 | if (imap == NULL) { |
| 125 | jfs_err("diMount: kmalloc returned NULL!"); |
| 126 | return -ENOMEM; |
| 127 | } |
| 128 | |
| 129 | /* read the on-disk inode map control structure. */ |
| 130 | |
| 131 | mp = read_metapage(ipimap, |
| 132 | IMAPBLKNO << JFS_SBI(ipimap->i_sb)->l2nbperpage, |
| 133 | PSIZE, 0); |
| 134 | if (mp == NULL) { |
| 135 | kfree(imap); |
| 136 | return -EIO; |
| 137 | } |
| 138 | |
| 139 | /* copy the on-disk version to the in-memory version. */ |
| 140 | dinom_le = (struct dinomap_disk *) mp->data; |
| 141 | imap->im_freeiag = le32_to_cpu(dinom_le->in_freeiag); |
| 142 | imap->im_nextiag = le32_to_cpu(dinom_le->in_nextiag); |
| 143 | atomic_set(&imap->im_numinos, le32_to_cpu(dinom_le->in_numinos)); |
| 144 | atomic_set(&imap->im_numfree, le32_to_cpu(dinom_le->in_numfree)); |
| 145 | imap->im_nbperiext = le32_to_cpu(dinom_le->in_nbperiext); |
| 146 | imap->im_l2nbperiext = le32_to_cpu(dinom_le->in_l2nbperiext); |
| 147 | for (index = 0; index < MAXAG; index++) { |
| 148 | imap->im_agctl[index].inofree = |
| 149 | le32_to_cpu(dinom_le->in_agctl[index].inofree); |
| 150 | imap->im_agctl[index].extfree = |
| 151 | le32_to_cpu(dinom_le->in_agctl[index].extfree); |
| 152 | imap->im_agctl[index].numinos = |
| 153 | le32_to_cpu(dinom_le->in_agctl[index].numinos); |
| 154 | imap->im_agctl[index].numfree = |
| 155 | le32_to_cpu(dinom_le->in_agctl[index].numfree); |
| 156 | } |
| 157 | |
| 158 | /* release the buffer. */ |
| 159 | release_metapage(mp); |
| 160 | |
| 161 | /* |
| 162 | * allocate/initialize inode allocation map locks |
| 163 | */ |
| 164 | /* allocate and init iag free list lock */ |
| 165 | IAGFREE_LOCK_INIT(imap); |
| 166 | |
| 167 | /* allocate and init ag list locks */ |
| 168 | for (index = 0; index < MAXAG; index++) { |
| 169 | AG_LOCK_INIT(imap, index); |
| 170 | } |
| 171 | |
| 172 | /* bind the inode map inode and inode map control structure |
| 173 | * to each other. |
| 174 | */ |
| 175 | imap->im_ipimap = ipimap; |
| 176 | JFS_IP(ipimap)->i_imap = imap; |
| 177 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | return (0); |
| 179 | } |
| 180 | |
| 181 | |
| 182 | /* |
| 183 | * NAME: diUnmount() |
| 184 | * |
| 185 | * FUNCTION: write to disk the incore inode map control structures for |
| 186 | * a fileset or aggregate at unmount time. |
| 187 | * |
| 188 | * PARAMETERS: |
| 189 | * ipimap - pointer to inode map inode for the aggregate or fileset. |
| 190 | * |
| 191 | * RETURN VALUES: |
| 192 | * 0 - success |
| 193 | * -ENOMEM - insufficient free virtual memory. |
| 194 | * -EIO - i/o error. |
| 195 | */ |
| 196 | int diUnmount(struct inode *ipimap, int mounterror) |
| 197 | { |
| 198 | struct inomap *imap = JFS_IP(ipimap)->i_imap; |
| 199 | |
| 200 | /* |
| 201 | * update the on-disk inode map control structure |
| 202 | */ |
| 203 | |
| 204 | if (!(mounterror || isReadOnly(ipimap))) |
| 205 | diSync(ipimap); |
| 206 | |
| 207 | /* |
| 208 | * Invalidate the page cache buffers |
| 209 | */ |
| 210 | truncate_inode_pages(ipimap->i_mapping, 0); |
| 211 | |
| 212 | /* |
| 213 | * free in-memory control structure |
| 214 | */ |
| 215 | kfree(imap); |
| 216 | |
| 217 | return (0); |
| 218 | } |
| 219 | |
| 220 | |
| 221 | /* |
| 222 | * diSync() |
| 223 | */ |
| 224 | int diSync(struct inode *ipimap) |
| 225 | { |
| 226 | struct dinomap_disk *dinom_le; |
| 227 | struct inomap *imp = JFS_IP(ipimap)->i_imap; |
| 228 | struct metapage *mp; |
| 229 | int index; |
| 230 | |
| 231 | /* |
| 232 | * write imap global conrol page |
| 233 | */ |
| 234 | /* read the on-disk inode map control structure */ |
| 235 | mp = get_metapage(ipimap, |
| 236 | IMAPBLKNO << JFS_SBI(ipimap->i_sb)->l2nbperpage, |
| 237 | PSIZE, 0); |
| 238 | if (mp == NULL) { |
| 239 | jfs_err("diSync: get_metapage failed!"); |
| 240 | return -EIO; |
| 241 | } |
| 242 | |
| 243 | /* copy the in-memory version to the on-disk version */ |
| 244 | dinom_le = (struct dinomap_disk *) mp->data; |
| 245 | dinom_le->in_freeiag = cpu_to_le32(imp->im_freeiag); |
| 246 | dinom_le->in_nextiag = cpu_to_le32(imp->im_nextiag); |
| 247 | dinom_le->in_numinos = cpu_to_le32(atomic_read(&imp->im_numinos)); |
| 248 | dinom_le->in_numfree = cpu_to_le32(atomic_read(&imp->im_numfree)); |
| 249 | dinom_le->in_nbperiext = cpu_to_le32(imp->im_nbperiext); |
| 250 | dinom_le->in_l2nbperiext = cpu_to_le32(imp->im_l2nbperiext); |
| 251 | for (index = 0; index < MAXAG; index++) { |
| 252 | dinom_le->in_agctl[index].inofree = |
| 253 | cpu_to_le32(imp->im_agctl[index].inofree); |
| 254 | dinom_le->in_agctl[index].extfree = |
| 255 | cpu_to_le32(imp->im_agctl[index].extfree); |
| 256 | dinom_le->in_agctl[index].numinos = |
| 257 | cpu_to_le32(imp->im_agctl[index].numinos); |
| 258 | dinom_le->in_agctl[index].numfree = |
| 259 | cpu_to_le32(imp->im_agctl[index].numfree); |
| 260 | } |
| 261 | |
| 262 | /* write out the control structure */ |
| 263 | write_metapage(mp); |
| 264 | |
| 265 | /* |
| 266 | * write out dirty pages of imap |
| 267 | */ |
| 268 | filemap_fdatawrite(ipimap->i_mapping); |
| 269 | filemap_fdatawait(ipimap->i_mapping); |
| 270 | |
| 271 | diWriteSpecial(ipimap, 0); |
| 272 | |
| 273 | return (0); |
| 274 | } |
| 275 | |
| 276 | |
| 277 | /* |
| 278 | * NAME: diRead() |
| 279 | * |
| 280 | * FUNCTION: initialize an incore inode from disk. |
| 281 | * |
| 282 | * on entry, the specifed incore inode should itself |
| 283 | * specify the disk inode number corresponding to the |
| 284 | * incore inode (i.e. i_number should be initialized). |
| 285 | * |
| 286 | * this routine handles incore inode initialization for |
| 287 | * both "special" and "regular" inodes. special inodes |
| 288 | * are those required early in the mount process and |
| 289 | * require special handling since much of the file system |
| 290 | * is not yet initialized. these "special" inodes are |
| 291 | * identified by a NULL inode map inode pointer and are |
| 292 | * actually initialized by a call to diReadSpecial(). |
| 293 | * |
| 294 | * for regular inodes, the iag describing the disk inode |
| 295 | * is read from disk to determine the inode extent address |
| 296 | * for the disk inode. with the inode extent address in |
| 297 | * hand, the page of the extent that contains the disk |
| 298 | * inode is read and the disk inode is copied to the |
| 299 | * incore inode. |
| 300 | * |
| 301 | * PARAMETERS: |
| 302 | * ip - pointer to incore inode to be initialized from disk. |
| 303 | * |
| 304 | * RETURN VALUES: |
| 305 | * 0 - success |
| 306 | * -EIO - i/o error. |
| 307 | * -ENOMEM - insufficient memory |
| 308 | * |
| 309 | */ |
| 310 | int diRead(struct inode *ip) |
| 311 | { |
| 312 | struct jfs_sb_info *sbi = JFS_SBI(ip->i_sb); |
| 313 | int iagno, ino, extno, rc; |
| 314 | struct inode *ipimap; |
| 315 | struct dinode *dp; |
| 316 | struct iag *iagp; |
| 317 | struct metapage *mp; |
| 318 | s64 blkno, agstart; |
| 319 | struct inomap *imap; |
| 320 | int block_offset; |
| 321 | int inodes_left; |
| 322 | uint pageno; |
| 323 | int rel_inode; |
| 324 | |
| 325 | jfs_info("diRead: ino = %ld", ip->i_ino); |
| 326 | |
| 327 | ipimap = sbi->ipimap; |
| 328 | JFS_IP(ip)->ipimap = ipimap; |
| 329 | |
| 330 | /* determine the iag number for this inode (number) */ |
| 331 | iagno = INOTOIAG(ip->i_ino); |
| 332 | |
| 333 | /* read the iag */ |
| 334 | imap = JFS_IP(ipimap)->i_imap; |
| 335 | IREAD_LOCK(ipimap); |
| 336 | rc = diIAGRead(imap, iagno, &mp); |
| 337 | IREAD_UNLOCK(ipimap); |
| 338 | if (rc) { |
| 339 | jfs_err("diRead: diIAGRead returned %d", rc); |
| 340 | return (rc); |
| 341 | } |
| 342 | |
| 343 | iagp = (struct iag *) mp->data; |
| 344 | |
| 345 | /* determine inode extent that holds the disk inode */ |
| 346 | ino = ip->i_ino & (INOSPERIAG - 1); |
| 347 | extno = ino >> L2INOSPEREXT; |
| 348 | |
| 349 | if ((lengthPXD(&iagp->inoext[extno]) != imap->im_nbperiext) || |
| 350 | (addressPXD(&iagp->inoext[extno]) == 0)) { |
| 351 | release_metapage(mp); |
| 352 | return -ESTALE; |
| 353 | } |
| 354 | |
| 355 | /* get disk block number of the page within the inode extent |
| 356 | * that holds the disk inode. |
| 357 | */ |
| 358 | blkno = INOPBLK(&iagp->inoext[extno], ino, sbi->l2nbperpage); |
| 359 | |
| 360 | /* get the ag for the iag */ |
| 361 | agstart = le64_to_cpu(iagp->agstart); |
| 362 | |
| 363 | release_metapage(mp); |
| 364 | |
| 365 | rel_inode = (ino & (INOSPERPAGE - 1)); |
| 366 | pageno = blkno >> sbi->l2nbperpage; |
| 367 | |
| 368 | if ((block_offset = ((u32) blkno & (sbi->nbperpage - 1)))) { |
| 369 | /* |
| 370 | * OS/2 didn't always align inode extents on page boundaries |
| 371 | */ |
| 372 | inodes_left = |
| 373 | (sbi->nbperpage - block_offset) << sbi->l2niperblk; |
| 374 | |
| 375 | if (rel_inode < inodes_left) |
| 376 | rel_inode += block_offset << sbi->l2niperblk; |
| 377 | else { |
| 378 | pageno += 1; |
| 379 | rel_inode -= inodes_left; |
| 380 | } |
| 381 | } |
| 382 | |
| 383 | /* read the page of disk inode */ |
| 384 | mp = read_metapage(ipimap, pageno << sbi->l2nbperpage, PSIZE, 1); |
| 385 | if (mp == 0) { |
| 386 | jfs_err("diRead: read_metapage failed"); |
| 387 | return -EIO; |
| 388 | } |
| 389 | |
| 390 | /* locate the the disk inode requested */ |
| 391 | dp = (struct dinode *) mp->data; |
| 392 | dp += rel_inode; |
| 393 | |
| 394 | if (ip->i_ino != le32_to_cpu(dp->di_number)) { |
| 395 | jfs_error(ip->i_sb, "diRead: i_ino != di_number"); |
| 396 | rc = -EIO; |
| 397 | } else if (le32_to_cpu(dp->di_nlink) == 0) |
| 398 | rc = -ESTALE; |
| 399 | else |
| 400 | /* copy the disk inode to the in-memory inode */ |
| 401 | rc = copy_from_dinode(dp, ip); |
| 402 | |
| 403 | release_metapage(mp); |
| 404 | |
| 405 | /* set the ag for the inode */ |
| 406 | JFS_IP(ip)->agno = BLKTOAG(agstart, sbi); |
| 407 | JFS_IP(ip)->active_ag = -1; |
| 408 | |
| 409 | return (rc); |
| 410 | } |
| 411 | |
| 412 | |
| 413 | /* |
| 414 | * NAME: diReadSpecial() |
| 415 | * |
| 416 | * FUNCTION: initialize a 'special' inode from disk. |
| 417 | * |
| 418 | * this routines handles aggregate level inodes. The |
| 419 | * inode cache cannot differentiate between the |
| 420 | * aggregate inodes and the filesystem inodes, so we |
| 421 | * handle these here. We don't actually use the aggregate |
| 422 | * inode map, since these inodes are at a fixed location |
| 423 | * and in some cases the aggregate inode map isn't initialized |
| 424 | * yet. |
| 425 | * |
| 426 | * PARAMETERS: |
| 427 | * sb - filesystem superblock |
| 428 | * inum - aggregate inode number |
| 429 | * secondary - 1 if secondary aggregate inode table |
| 430 | * |
| 431 | * RETURN VALUES: |
| 432 | * new inode - success |
| 433 | * NULL - i/o error. |
| 434 | */ |
| 435 | struct inode *diReadSpecial(struct super_block *sb, ino_t inum, int secondary) |
| 436 | { |
| 437 | struct jfs_sb_info *sbi = JFS_SBI(sb); |
| 438 | uint address; |
| 439 | struct dinode *dp; |
| 440 | struct inode *ip; |
| 441 | struct metapage *mp; |
| 442 | |
| 443 | ip = new_inode(sb); |
| 444 | if (ip == NULL) { |
| 445 | jfs_err("diReadSpecial: new_inode returned NULL!"); |
| 446 | return ip; |
| 447 | } |
| 448 | |
| 449 | if (secondary) { |
| 450 | address = addressPXD(&sbi->ait2) >> sbi->l2nbperpage; |
| 451 | JFS_IP(ip)->ipimap = sbi->ipaimap2; |
| 452 | } else { |
| 453 | address = AITBL_OFF >> L2PSIZE; |
| 454 | JFS_IP(ip)->ipimap = sbi->ipaimap; |
| 455 | } |
| 456 | |
| 457 | ASSERT(inum < INOSPEREXT); |
| 458 | |
| 459 | ip->i_ino = inum; |
| 460 | |
| 461 | address += inum >> 3; /* 8 inodes per 4K page */ |
| 462 | |
| 463 | /* read the page of fixed disk inode (AIT) in raw mode */ |
| 464 | mp = read_metapage(ip, address << sbi->l2nbperpage, PSIZE, 1); |
| 465 | if (mp == NULL) { |
| 466 | ip->i_nlink = 1; /* Don't want iput() deleting it */ |
| 467 | iput(ip); |
| 468 | return (NULL); |
| 469 | } |
| 470 | |
| 471 | /* get the pointer to the disk inode of interest */ |
| 472 | dp = (struct dinode *) (mp->data); |
| 473 | dp += inum % 8; /* 8 inodes per 4K page */ |
| 474 | |
| 475 | /* copy on-disk inode to in-memory inode */ |
| 476 | if ((copy_from_dinode(dp, ip)) != 0) { |
| 477 | /* handle bad return by returning NULL for ip */ |
| 478 | ip->i_nlink = 1; /* Don't want iput() deleting it */ |
| 479 | iput(ip); |
| 480 | /* release the page */ |
| 481 | release_metapage(mp); |
| 482 | return (NULL); |
| 483 | |
| 484 | } |
| 485 | |
Dave Kleikamp | 7fab479 | 2005-05-02 12:25:02 -0600 | [diff] [blame] | 486 | ip->i_mapping->a_ops = &jfs_metapage_aops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | mapping_set_gfp_mask(ip->i_mapping, GFP_NOFS); |
| 488 | |
| 489 | /* Allocations to metadata inodes should not affect quotas */ |
| 490 | ip->i_flags |= S_NOQUOTA; |
| 491 | |
| 492 | if ((inum == FILESYSTEM_I) && (JFS_IP(ip)->ipimap == sbi->ipaimap)) { |
| 493 | sbi->gengen = le32_to_cpu(dp->di_gengen); |
| 494 | sbi->inostamp = le32_to_cpu(dp->di_inostamp); |
| 495 | } |
| 496 | |
| 497 | /* release the page */ |
| 498 | release_metapage(mp); |
| 499 | |
Dave Kleikamp | ac17b8b | 2005-10-03 15:32:11 -0500 | [diff] [blame^] | 500 | hlist_add_head(&ip->i_hash, &aggregate_hash); |
| 501 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | return (ip); |
| 503 | } |
| 504 | |
| 505 | /* |
| 506 | * NAME: diWriteSpecial() |
| 507 | * |
| 508 | * FUNCTION: Write the special inode to disk |
| 509 | * |
| 510 | * PARAMETERS: |
| 511 | * ip - special inode |
| 512 | * secondary - 1 if secondary aggregate inode table |
| 513 | * |
| 514 | * RETURN VALUES: none |
| 515 | */ |
| 516 | |
| 517 | void diWriteSpecial(struct inode *ip, int secondary) |
| 518 | { |
| 519 | struct jfs_sb_info *sbi = JFS_SBI(ip->i_sb); |
| 520 | uint address; |
| 521 | struct dinode *dp; |
| 522 | ino_t inum = ip->i_ino; |
| 523 | struct metapage *mp; |
| 524 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 525 | if (secondary) |
| 526 | address = addressPXD(&sbi->ait2) >> sbi->l2nbperpage; |
| 527 | else |
| 528 | address = AITBL_OFF >> L2PSIZE; |
| 529 | |
| 530 | ASSERT(inum < INOSPEREXT); |
| 531 | |
| 532 | address += inum >> 3; /* 8 inodes per 4K page */ |
| 533 | |
| 534 | /* read the page of fixed disk inode (AIT) in raw mode */ |
| 535 | mp = read_metapage(ip, address << sbi->l2nbperpage, PSIZE, 1); |
| 536 | if (mp == NULL) { |
| 537 | jfs_err("diWriteSpecial: failed to read aggregate inode " |
| 538 | "extent!"); |
| 539 | return; |
| 540 | } |
| 541 | |
| 542 | /* get the pointer to the disk inode of interest */ |
| 543 | dp = (struct dinode *) (mp->data); |
| 544 | dp += inum % 8; /* 8 inodes per 4K page */ |
| 545 | |
| 546 | /* copy on-disk inode to in-memory inode */ |
| 547 | copy_to_dinode(dp, ip); |
| 548 | memcpy(&dp->di_xtroot, &JFS_IP(ip)->i_xtroot, 288); |
| 549 | |
| 550 | if (inum == FILESYSTEM_I) |
| 551 | dp->di_gengen = cpu_to_le32(sbi->gengen); |
| 552 | |
| 553 | /* write the page */ |
| 554 | write_metapage(mp); |
| 555 | } |
| 556 | |
| 557 | /* |
| 558 | * NAME: diFreeSpecial() |
| 559 | * |
| 560 | * FUNCTION: Free allocated space for special inode |
| 561 | */ |
| 562 | void diFreeSpecial(struct inode *ip) |
| 563 | { |
| 564 | if (ip == NULL) { |
| 565 | jfs_err("diFreeSpecial called with NULL ip!"); |
| 566 | return; |
| 567 | } |
| 568 | filemap_fdatawrite(ip->i_mapping); |
| 569 | filemap_fdatawait(ip->i_mapping); |
| 570 | truncate_inode_pages(ip->i_mapping, 0); |
| 571 | iput(ip); |
| 572 | } |
| 573 | |
| 574 | |
| 575 | |
| 576 | /* |
| 577 | * NAME: diWrite() |
| 578 | * |
| 579 | * FUNCTION: write the on-disk inode portion of the in-memory inode |
| 580 | * to its corresponding on-disk inode. |
| 581 | * |
| 582 | * on entry, the specifed incore inode should itself |
| 583 | * specify the disk inode number corresponding to the |
| 584 | * incore inode (i.e. i_number should be initialized). |
| 585 | * |
| 586 | * the inode contains the inode extent address for the disk |
| 587 | * inode. with the inode extent address in hand, the |
| 588 | * page of the extent that contains the disk inode is |
| 589 | * read and the disk inode portion of the incore inode |
| 590 | * is copied to the disk inode. |
| 591 | * |
| 592 | * PARAMETERS: |
| 593 | * tid - transacation id |
| 594 | * ip - pointer to incore inode to be written to the inode extent. |
| 595 | * |
| 596 | * RETURN VALUES: |
| 597 | * 0 - success |
| 598 | * -EIO - i/o error. |
| 599 | */ |
| 600 | int diWrite(tid_t tid, struct inode *ip) |
| 601 | { |
| 602 | struct jfs_sb_info *sbi = JFS_SBI(ip->i_sb); |
| 603 | struct jfs_inode_info *jfs_ip = JFS_IP(ip); |
| 604 | int rc = 0; |
| 605 | s32 ino; |
| 606 | struct dinode *dp; |
| 607 | s64 blkno; |
| 608 | int block_offset; |
| 609 | int inodes_left; |
| 610 | struct metapage *mp; |
| 611 | uint pageno; |
| 612 | int rel_inode; |
| 613 | int dioffset; |
| 614 | struct inode *ipimap; |
| 615 | uint type; |
| 616 | lid_t lid; |
| 617 | struct tlock *ditlck, *tlck; |
| 618 | struct linelock *dilinelock, *ilinelock; |
| 619 | struct lv *lv; |
| 620 | int n; |
| 621 | |
| 622 | ipimap = jfs_ip->ipimap; |
| 623 | |
| 624 | ino = ip->i_ino & (INOSPERIAG - 1); |
| 625 | |
| 626 | if (!addressPXD(&(jfs_ip->ixpxd)) || |
| 627 | (lengthPXD(&(jfs_ip->ixpxd)) != |
| 628 | JFS_IP(ipimap)->i_imap->im_nbperiext)) { |
| 629 | jfs_error(ip->i_sb, "diWrite: ixpxd invalid"); |
| 630 | return -EIO; |
| 631 | } |
| 632 | |
| 633 | /* |
| 634 | * read the page of disk inode containing the specified inode: |
| 635 | */ |
| 636 | /* compute the block address of the page */ |
| 637 | blkno = INOPBLK(&(jfs_ip->ixpxd), ino, sbi->l2nbperpage); |
| 638 | |
| 639 | rel_inode = (ino & (INOSPERPAGE - 1)); |
| 640 | pageno = blkno >> sbi->l2nbperpage; |
| 641 | |
| 642 | if ((block_offset = ((u32) blkno & (sbi->nbperpage - 1)))) { |
| 643 | /* |
| 644 | * OS/2 didn't always align inode extents on page boundaries |
| 645 | */ |
| 646 | inodes_left = |
| 647 | (sbi->nbperpage - block_offset) << sbi->l2niperblk; |
| 648 | |
| 649 | if (rel_inode < inodes_left) |
| 650 | rel_inode += block_offset << sbi->l2niperblk; |
| 651 | else { |
| 652 | pageno += 1; |
| 653 | rel_inode -= inodes_left; |
| 654 | } |
| 655 | } |
| 656 | /* read the page of disk inode */ |
| 657 | retry: |
| 658 | mp = read_metapage(ipimap, pageno << sbi->l2nbperpage, PSIZE, 1); |
| 659 | if (mp == 0) |
| 660 | return -EIO; |
| 661 | |
| 662 | /* get the pointer to the disk inode */ |
| 663 | dp = (struct dinode *) mp->data; |
| 664 | dp += rel_inode; |
| 665 | |
| 666 | dioffset = (ino & (INOSPERPAGE - 1)) << L2DISIZE; |
| 667 | |
| 668 | /* |
| 669 | * acquire transaction lock on the on-disk inode; |
| 670 | * N.B. tlock is acquired on ipimap not ip; |
| 671 | */ |
| 672 | if ((ditlck = |
| 673 | txLock(tid, ipimap, mp, tlckINODE | tlckENTRY)) == NULL) |
| 674 | goto retry; |
| 675 | dilinelock = (struct linelock *) & ditlck->lock; |
| 676 | |
| 677 | /* |
| 678 | * copy btree root from in-memory inode to on-disk inode |
| 679 | * |
| 680 | * (tlock is taken from inline B+-tree root in in-memory |
| 681 | * inode when the B+-tree root is updated, which is pointed |
| 682 | * by jfs_ip->blid as well as being on tx tlock list) |
| 683 | * |
| 684 | * further processing of btree root is based on the copy |
| 685 | * in in-memory inode, where txLog() will log from, and, |
| 686 | * for xtree root, txUpdateMap() will update map and reset |
| 687 | * XAD_NEW bit; |
| 688 | */ |
| 689 | |
| 690 | if (S_ISDIR(ip->i_mode) && (lid = jfs_ip->xtlid)) { |
| 691 | /* |
| 692 | * This is the special xtree inside the directory for storing |
| 693 | * the directory table |
| 694 | */ |
| 695 | xtpage_t *p, *xp; |
| 696 | xad_t *xad; |
| 697 | |
| 698 | jfs_ip->xtlid = 0; |
| 699 | tlck = lid_to_tlock(lid); |
| 700 | assert(tlck->type & tlckXTREE); |
| 701 | tlck->type |= tlckBTROOT; |
| 702 | tlck->mp = mp; |
| 703 | ilinelock = (struct linelock *) & tlck->lock; |
| 704 | |
| 705 | /* |
| 706 | * copy xtree root from inode to dinode: |
| 707 | */ |
| 708 | p = &jfs_ip->i_xtroot; |
| 709 | xp = (xtpage_t *) &dp->di_dirtable; |
| 710 | lv = ilinelock->lv; |
| 711 | for (n = 0; n < ilinelock->index; n++, lv++) { |
| 712 | memcpy(&xp->xad[lv->offset], &p->xad[lv->offset], |
| 713 | lv->length << L2XTSLOTSIZE); |
| 714 | } |
| 715 | |
| 716 | /* reset on-disk (metadata page) xtree XAD_NEW bit */ |
| 717 | xad = &xp->xad[XTENTRYSTART]; |
| 718 | for (n = XTENTRYSTART; |
| 719 | n < le16_to_cpu(xp->header.nextindex); n++, xad++) |
| 720 | if (xad->flag & (XAD_NEW | XAD_EXTENDED)) |
| 721 | xad->flag &= ~(XAD_NEW | XAD_EXTENDED); |
| 722 | } |
| 723 | |
| 724 | if ((lid = jfs_ip->blid) == 0) |
| 725 | goto inlineData; |
| 726 | jfs_ip->blid = 0; |
| 727 | |
| 728 | tlck = lid_to_tlock(lid); |
| 729 | type = tlck->type; |
| 730 | tlck->type |= tlckBTROOT; |
| 731 | tlck->mp = mp; |
| 732 | ilinelock = (struct linelock *) & tlck->lock; |
| 733 | |
| 734 | /* |
| 735 | * regular file: 16 byte (XAD slot) granularity |
| 736 | */ |
| 737 | if (type & tlckXTREE) { |
| 738 | xtpage_t *p, *xp; |
| 739 | xad_t *xad; |
| 740 | |
| 741 | /* |
| 742 | * copy xtree root from inode to dinode: |
| 743 | */ |
| 744 | p = &jfs_ip->i_xtroot; |
| 745 | xp = &dp->di_xtroot; |
| 746 | lv = ilinelock->lv; |
| 747 | for (n = 0; n < ilinelock->index; n++, lv++) { |
| 748 | memcpy(&xp->xad[lv->offset], &p->xad[lv->offset], |
| 749 | lv->length << L2XTSLOTSIZE); |
| 750 | } |
| 751 | |
| 752 | /* reset on-disk (metadata page) xtree XAD_NEW bit */ |
| 753 | xad = &xp->xad[XTENTRYSTART]; |
| 754 | for (n = XTENTRYSTART; |
| 755 | n < le16_to_cpu(xp->header.nextindex); n++, xad++) |
| 756 | if (xad->flag & (XAD_NEW | XAD_EXTENDED)) |
| 757 | xad->flag &= ~(XAD_NEW | XAD_EXTENDED); |
| 758 | } |
| 759 | /* |
| 760 | * directory: 32 byte (directory entry slot) granularity |
| 761 | */ |
| 762 | else if (type & tlckDTREE) { |
| 763 | dtpage_t *p, *xp; |
| 764 | |
| 765 | /* |
| 766 | * copy dtree root from inode to dinode: |
| 767 | */ |
| 768 | p = (dtpage_t *) &jfs_ip->i_dtroot; |
| 769 | xp = (dtpage_t *) & dp->di_dtroot; |
| 770 | lv = ilinelock->lv; |
| 771 | for (n = 0; n < ilinelock->index; n++, lv++) { |
| 772 | memcpy(&xp->slot[lv->offset], &p->slot[lv->offset], |
| 773 | lv->length << L2DTSLOTSIZE); |
| 774 | } |
| 775 | } else { |
| 776 | jfs_err("diWrite: UFO tlock"); |
| 777 | } |
| 778 | |
| 779 | inlineData: |
| 780 | /* |
| 781 | * copy inline symlink from in-memory inode to on-disk inode |
| 782 | */ |
| 783 | if (S_ISLNK(ip->i_mode) && ip->i_size < IDATASIZE) { |
| 784 | lv = & dilinelock->lv[dilinelock->index]; |
| 785 | lv->offset = (dioffset + 2 * 128) >> L2INODESLOTSIZE; |
| 786 | lv->length = 2; |
| 787 | memcpy(&dp->di_fastsymlink, jfs_ip->i_inline, IDATASIZE); |
| 788 | dilinelock->index++; |
| 789 | } |
| 790 | /* |
| 791 | * copy inline data from in-memory inode to on-disk inode: |
| 792 | * 128 byte slot granularity |
| 793 | */ |
| 794 | if (test_cflag(COMMIT_Inlineea, ip)) { |
| 795 | lv = & dilinelock->lv[dilinelock->index]; |
| 796 | lv->offset = (dioffset + 3 * 128) >> L2INODESLOTSIZE; |
| 797 | lv->length = 1; |
| 798 | memcpy(&dp->di_inlineea, jfs_ip->i_inline_ea, INODESLOTSIZE); |
| 799 | dilinelock->index++; |
| 800 | |
| 801 | clear_cflag(COMMIT_Inlineea, ip); |
| 802 | } |
| 803 | |
| 804 | /* |
| 805 | * lock/copy inode base: 128 byte slot granularity |
| 806 | */ |
| 807 | // baseDinode: |
| 808 | lv = & dilinelock->lv[dilinelock->index]; |
| 809 | lv->offset = dioffset >> L2INODESLOTSIZE; |
| 810 | copy_to_dinode(dp, ip); |
| 811 | if (test_and_clear_cflag(COMMIT_Dirtable, ip)) { |
| 812 | lv->length = 2; |
| 813 | memcpy(&dp->di_dirtable, &jfs_ip->i_dirtable, 96); |
| 814 | } else |
| 815 | lv->length = 1; |
| 816 | dilinelock->index++; |
| 817 | |
| 818 | #ifdef _JFS_FASTDASD |
| 819 | /* |
| 820 | * We aren't logging changes to the DASD used in directory inodes, |
| 821 | * but we need to write them to disk. If we don't unmount cleanly, |
| 822 | * mount will recalculate the DASD used. |
| 823 | */ |
| 824 | if (S_ISDIR(ip->i_mode) |
| 825 | && (ip->i_ipmnt->i_mntflag & JFS_DASD_ENABLED)) |
| 826 | memcpy(&dp->di_DASD, &ip->i_DASD, sizeof(struct dasd)); |
| 827 | #endif /* _JFS_FASTDASD */ |
| 828 | |
| 829 | /* release the buffer holding the updated on-disk inode. |
| 830 | * the buffer will be later written by commit processing. |
| 831 | */ |
| 832 | write_metapage(mp); |
| 833 | |
| 834 | return (rc); |
| 835 | } |
| 836 | |
| 837 | |
| 838 | /* |
| 839 | * NAME: diFree(ip) |
| 840 | * |
| 841 | * FUNCTION: free a specified inode from the inode working map |
| 842 | * for a fileset or aggregate. |
| 843 | * |
| 844 | * if the inode to be freed represents the first (only) |
| 845 | * free inode within the iag, the iag will be placed on |
| 846 | * the ag free inode list. |
| 847 | * |
| 848 | * freeing the inode will cause the inode extent to be |
| 849 | * freed if the inode is the only allocated inode within |
| 850 | * the extent. in this case all the disk resource backing |
| 851 | * up the inode extent will be freed. in addition, the iag |
| 852 | * will be placed on the ag extent free list if the extent |
| 853 | * is the first free extent in the iag. if freeing the |
| 854 | * extent also means that no free inodes will exist for |
| 855 | * the iag, the iag will also be removed from the ag free |
| 856 | * inode list. |
| 857 | * |
| 858 | * the iag describing the inode will be freed if the extent |
| 859 | * is to be freed and it is the only backed extent within |
| 860 | * the iag. in this case, the iag will be removed from the |
| 861 | * ag free extent list and ag free inode list and placed on |
| 862 | * the inode map's free iag list. |
| 863 | * |
| 864 | * a careful update approach is used to provide consistency |
| 865 | * in the face of updates to multiple buffers. under this |
| 866 | * approach, all required buffers are obtained before making |
| 867 | * any updates and are held until all updates are complete. |
| 868 | * |
| 869 | * PARAMETERS: |
| 870 | * ip - inode to be freed. |
| 871 | * |
| 872 | * RETURN VALUES: |
| 873 | * 0 - success |
| 874 | * -EIO - i/o error. |
| 875 | */ |
| 876 | int diFree(struct inode *ip) |
| 877 | { |
| 878 | int rc; |
| 879 | ino_t inum = ip->i_ino; |
| 880 | struct iag *iagp, *aiagp, *biagp, *ciagp, *diagp; |
| 881 | struct metapage *mp, *amp, *bmp, *cmp, *dmp; |
| 882 | int iagno, ino, extno, bitno, sword, agno; |
| 883 | int back, fwd; |
| 884 | u32 bitmap, mask; |
| 885 | struct inode *ipimap = JFS_SBI(ip->i_sb)->ipimap; |
| 886 | struct inomap *imap = JFS_IP(ipimap)->i_imap; |
| 887 | pxd_t freepxd; |
| 888 | tid_t tid; |
| 889 | struct inode *iplist[3]; |
| 890 | struct tlock *tlck; |
| 891 | struct pxd_lock *pxdlock; |
| 892 | |
| 893 | /* |
| 894 | * This is just to suppress compiler warnings. The same logic that |
| 895 | * references these variables is used to initialize them. |
| 896 | */ |
| 897 | aiagp = biagp = ciagp = diagp = NULL; |
| 898 | |
| 899 | /* get the iag number containing the inode. |
| 900 | */ |
| 901 | iagno = INOTOIAG(inum); |
| 902 | |
| 903 | /* make sure that the iag is contained within |
| 904 | * the map. |
| 905 | */ |
| 906 | if (iagno >= imap->im_nextiag) { |
| 907 | dump_mem("imap", imap, 32); |
| 908 | jfs_error(ip->i_sb, |
| 909 | "diFree: inum = %d, iagno = %d, nextiag = %d", |
| 910 | (uint) inum, iagno, imap->im_nextiag); |
| 911 | return -EIO; |
| 912 | } |
| 913 | |
| 914 | /* get the allocation group for this ino. |
| 915 | */ |
| 916 | agno = JFS_IP(ip)->agno; |
| 917 | |
| 918 | /* Lock the AG specific inode map information |
| 919 | */ |
| 920 | AG_LOCK(imap, agno); |
| 921 | |
| 922 | /* Obtain read lock in imap inode. Don't release it until we have |
| 923 | * read all of the IAG's that we are going to. |
| 924 | */ |
| 925 | IREAD_LOCK(ipimap); |
| 926 | |
| 927 | /* read the iag. |
| 928 | */ |
| 929 | if ((rc = diIAGRead(imap, iagno, &mp))) { |
| 930 | IREAD_UNLOCK(ipimap); |
| 931 | AG_UNLOCK(imap, agno); |
| 932 | return (rc); |
| 933 | } |
| 934 | iagp = (struct iag *) mp->data; |
| 935 | |
| 936 | /* get the inode number and extent number of the inode within |
| 937 | * the iag and the inode number within the extent. |
| 938 | */ |
| 939 | ino = inum & (INOSPERIAG - 1); |
| 940 | extno = ino >> L2INOSPEREXT; |
| 941 | bitno = ino & (INOSPEREXT - 1); |
| 942 | mask = HIGHORDER >> bitno; |
| 943 | |
| 944 | if (!(le32_to_cpu(iagp->wmap[extno]) & mask)) { |
| 945 | jfs_error(ip->i_sb, |
| 946 | "diFree: wmap shows inode already free"); |
| 947 | } |
| 948 | |
| 949 | if (!addressPXD(&iagp->inoext[extno])) { |
| 950 | release_metapage(mp); |
| 951 | IREAD_UNLOCK(ipimap); |
| 952 | AG_UNLOCK(imap, agno); |
| 953 | jfs_error(ip->i_sb, "diFree: invalid inoext"); |
| 954 | return -EIO; |
| 955 | } |
| 956 | |
| 957 | /* compute the bitmap for the extent reflecting the freed inode. |
| 958 | */ |
| 959 | bitmap = le32_to_cpu(iagp->wmap[extno]) & ~mask; |
| 960 | |
| 961 | if (imap->im_agctl[agno].numfree > imap->im_agctl[agno].numinos) { |
| 962 | release_metapage(mp); |
| 963 | IREAD_UNLOCK(ipimap); |
| 964 | AG_UNLOCK(imap, agno); |
| 965 | jfs_error(ip->i_sb, "diFree: numfree > numinos"); |
| 966 | return -EIO; |
| 967 | } |
| 968 | /* |
| 969 | * inode extent still has some inodes or below low water mark: |
| 970 | * keep the inode extent; |
| 971 | */ |
| 972 | if (bitmap || |
| 973 | imap->im_agctl[agno].numfree < 96 || |
| 974 | (imap->im_agctl[agno].numfree < 288 && |
| 975 | (((imap->im_agctl[agno].numfree * 100) / |
| 976 | imap->im_agctl[agno].numinos) <= 25))) { |
| 977 | /* if the iag currently has no free inodes (i.e., |
| 978 | * the inode being freed is the first free inode of iag), |
| 979 | * insert the iag at head of the inode free list for the ag. |
| 980 | */ |
| 981 | if (iagp->nfreeinos == 0) { |
| 982 | /* check if there are any iags on the ag inode |
| 983 | * free list. if so, read the first one so that |
| 984 | * we can link the current iag onto the list at |
| 985 | * the head. |
| 986 | */ |
| 987 | if ((fwd = imap->im_agctl[agno].inofree) >= 0) { |
| 988 | /* read the iag that currently is the head |
| 989 | * of the list. |
| 990 | */ |
| 991 | if ((rc = diIAGRead(imap, fwd, &))) { |
| 992 | IREAD_UNLOCK(ipimap); |
| 993 | AG_UNLOCK(imap, agno); |
| 994 | release_metapage(mp); |
| 995 | return (rc); |
| 996 | } |
| 997 | aiagp = (struct iag *) amp->data; |
| 998 | |
| 999 | /* make current head point back to the iag. |
| 1000 | */ |
| 1001 | aiagp->inofreeback = cpu_to_le32(iagno); |
| 1002 | |
| 1003 | write_metapage(amp); |
| 1004 | } |
| 1005 | |
| 1006 | /* iag points forward to current head and iag |
| 1007 | * becomes the new head of the list. |
| 1008 | */ |
| 1009 | iagp->inofreefwd = |
| 1010 | cpu_to_le32(imap->im_agctl[agno].inofree); |
| 1011 | iagp->inofreeback = cpu_to_le32(-1); |
| 1012 | imap->im_agctl[agno].inofree = iagno; |
| 1013 | } |
| 1014 | IREAD_UNLOCK(ipimap); |
| 1015 | |
| 1016 | /* update the free inode summary map for the extent if |
| 1017 | * freeing the inode means the extent will now have free |
| 1018 | * inodes (i.e., the inode being freed is the first free |
| 1019 | * inode of extent), |
| 1020 | */ |
| 1021 | if (iagp->wmap[extno] == cpu_to_le32(ONES)) { |
| 1022 | sword = extno >> L2EXTSPERSUM; |
| 1023 | bitno = extno & (EXTSPERSUM - 1); |
| 1024 | iagp->inosmap[sword] &= |
| 1025 | cpu_to_le32(~(HIGHORDER >> bitno)); |
| 1026 | } |
| 1027 | |
| 1028 | /* update the bitmap. |
| 1029 | */ |
| 1030 | iagp->wmap[extno] = cpu_to_le32(bitmap); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1031 | |
| 1032 | /* update the free inode counts at the iag, ag and |
| 1033 | * map level. |
| 1034 | */ |
| 1035 | iagp->nfreeinos = |
| 1036 | cpu_to_le32(le32_to_cpu(iagp->nfreeinos) + 1); |
| 1037 | imap->im_agctl[agno].numfree += 1; |
| 1038 | atomic_inc(&imap->im_numfree); |
| 1039 | |
| 1040 | /* release the AG inode map lock |
| 1041 | */ |
| 1042 | AG_UNLOCK(imap, agno); |
| 1043 | |
| 1044 | /* write the iag */ |
| 1045 | write_metapage(mp); |
| 1046 | |
| 1047 | return (0); |
| 1048 | } |
| 1049 | |
| 1050 | |
| 1051 | /* |
| 1052 | * inode extent has become free and above low water mark: |
| 1053 | * free the inode extent; |
| 1054 | */ |
| 1055 | |
| 1056 | /* |
| 1057 | * prepare to update iag list(s) (careful update step 1) |
| 1058 | */ |
| 1059 | amp = bmp = cmp = dmp = NULL; |
| 1060 | fwd = back = -1; |
| 1061 | |
| 1062 | /* check if the iag currently has no free extents. if so, |
| 1063 | * it will be placed on the head of the ag extent free list. |
| 1064 | */ |
| 1065 | if (iagp->nfreeexts == 0) { |
| 1066 | /* check if the ag extent free list has any iags. |
| 1067 | * if so, read the iag at the head of the list now. |
| 1068 | * this (head) iag will be updated later to reflect |
| 1069 | * the addition of the current iag at the head of |
| 1070 | * the list. |
| 1071 | */ |
| 1072 | if ((fwd = imap->im_agctl[agno].extfree) >= 0) { |
| 1073 | if ((rc = diIAGRead(imap, fwd, &))) |
| 1074 | goto error_out; |
| 1075 | aiagp = (struct iag *) amp->data; |
| 1076 | } |
| 1077 | } else { |
| 1078 | /* iag has free extents. check if the addition of a free |
| 1079 | * extent will cause all extents to be free within this |
| 1080 | * iag. if so, the iag will be removed from the ag extent |
| 1081 | * free list and placed on the inode map's free iag list. |
| 1082 | */ |
| 1083 | if (iagp->nfreeexts == cpu_to_le32(EXTSPERIAG - 1)) { |
| 1084 | /* in preparation for removing the iag from the |
| 1085 | * ag extent free list, read the iags preceeding |
| 1086 | * and following the iag on the ag extent free |
| 1087 | * list. |
| 1088 | */ |
| 1089 | if ((fwd = le32_to_cpu(iagp->extfreefwd)) >= 0) { |
| 1090 | if ((rc = diIAGRead(imap, fwd, &))) |
| 1091 | goto error_out; |
| 1092 | aiagp = (struct iag *) amp->data; |
| 1093 | } |
| 1094 | |
| 1095 | if ((back = le32_to_cpu(iagp->extfreeback)) >= 0) { |
| 1096 | if ((rc = diIAGRead(imap, back, &bmp))) |
| 1097 | goto error_out; |
| 1098 | biagp = (struct iag *) bmp->data; |
| 1099 | } |
| 1100 | } |
| 1101 | } |
| 1102 | |
| 1103 | /* remove the iag from the ag inode free list if freeing |
| 1104 | * this extent cause the iag to have no free inodes. |
| 1105 | */ |
| 1106 | if (iagp->nfreeinos == cpu_to_le32(INOSPEREXT - 1)) { |
| 1107 | int inofreeback = le32_to_cpu(iagp->inofreeback); |
| 1108 | int inofreefwd = le32_to_cpu(iagp->inofreefwd); |
| 1109 | |
| 1110 | /* in preparation for removing the iag from the |
| 1111 | * ag inode free list, read the iags preceeding |
| 1112 | * and following the iag on the ag inode free |
| 1113 | * list. before reading these iags, we must make |
| 1114 | * sure that we already don't have them in hand |
| 1115 | * from up above, since re-reading an iag (buffer) |
| 1116 | * we are currently holding would cause a deadlock. |
| 1117 | */ |
| 1118 | if (inofreefwd >= 0) { |
| 1119 | |
| 1120 | if (inofreefwd == fwd) |
| 1121 | ciagp = (struct iag *) amp->data; |
| 1122 | else if (inofreefwd == back) |
| 1123 | ciagp = (struct iag *) bmp->data; |
| 1124 | else { |
| 1125 | if ((rc = |
| 1126 | diIAGRead(imap, inofreefwd, &cmp))) |
| 1127 | goto error_out; |
| 1128 | ciagp = (struct iag *) cmp->data; |
| 1129 | } |
| 1130 | assert(ciagp != NULL); |
| 1131 | } |
| 1132 | |
| 1133 | if (inofreeback >= 0) { |
| 1134 | if (inofreeback == fwd) |
| 1135 | diagp = (struct iag *) amp->data; |
| 1136 | else if (inofreeback == back) |
| 1137 | diagp = (struct iag *) bmp->data; |
| 1138 | else { |
| 1139 | if ((rc = |
| 1140 | diIAGRead(imap, inofreeback, &dmp))) |
| 1141 | goto error_out; |
| 1142 | diagp = (struct iag *) dmp->data; |
| 1143 | } |
| 1144 | assert(diagp != NULL); |
| 1145 | } |
| 1146 | } |
| 1147 | |
| 1148 | IREAD_UNLOCK(ipimap); |
| 1149 | |
| 1150 | /* |
| 1151 | * invalidate any page of the inode extent freed from buffer cache; |
| 1152 | */ |
| 1153 | freepxd = iagp->inoext[extno]; |
| 1154 | invalidate_pxd_metapages(ip, freepxd); |
| 1155 | |
| 1156 | /* |
| 1157 | * update iag list(s) (careful update step 2) |
| 1158 | */ |
| 1159 | /* add the iag to the ag extent free list if this is the |
| 1160 | * first free extent for the iag. |
| 1161 | */ |
| 1162 | if (iagp->nfreeexts == 0) { |
| 1163 | if (fwd >= 0) |
| 1164 | aiagp->extfreeback = cpu_to_le32(iagno); |
| 1165 | |
| 1166 | iagp->extfreefwd = |
| 1167 | cpu_to_le32(imap->im_agctl[agno].extfree); |
| 1168 | iagp->extfreeback = cpu_to_le32(-1); |
| 1169 | imap->im_agctl[agno].extfree = iagno; |
| 1170 | } else { |
| 1171 | /* remove the iag from the ag extent list if all extents |
| 1172 | * are now free and place it on the inode map iag free list. |
| 1173 | */ |
| 1174 | if (iagp->nfreeexts == cpu_to_le32(EXTSPERIAG - 1)) { |
| 1175 | if (fwd >= 0) |
| 1176 | aiagp->extfreeback = iagp->extfreeback; |
| 1177 | |
| 1178 | if (back >= 0) |
| 1179 | biagp->extfreefwd = iagp->extfreefwd; |
| 1180 | else |
| 1181 | imap->im_agctl[agno].extfree = |
| 1182 | le32_to_cpu(iagp->extfreefwd); |
| 1183 | |
| 1184 | iagp->extfreefwd = iagp->extfreeback = cpu_to_le32(-1); |
| 1185 | |
| 1186 | IAGFREE_LOCK(imap); |
| 1187 | iagp->iagfree = cpu_to_le32(imap->im_freeiag); |
| 1188 | imap->im_freeiag = iagno; |
| 1189 | IAGFREE_UNLOCK(imap); |
| 1190 | } |
| 1191 | } |
| 1192 | |
| 1193 | /* remove the iag from the ag inode free list if freeing |
| 1194 | * this extent causes the iag to have no free inodes. |
| 1195 | */ |
| 1196 | if (iagp->nfreeinos == cpu_to_le32(INOSPEREXT - 1)) { |
| 1197 | if ((int) le32_to_cpu(iagp->inofreefwd) >= 0) |
| 1198 | ciagp->inofreeback = iagp->inofreeback; |
| 1199 | |
| 1200 | if ((int) le32_to_cpu(iagp->inofreeback) >= 0) |
| 1201 | diagp->inofreefwd = iagp->inofreefwd; |
| 1202 | else |
| 1203 | imap->im_agctl[agno].inofree = |
| 1204 | le32_to_cpu(iagp->inofreefwd); |
| 1205 | |
| 1206 | iagp->inofreefwd = iagp->inofreeback = cpu_to_le32(-1); |
| 1207 | } |
| 1208 | |
| 1209 | /* update the inode extent address and working map |
| 1210 | * to reflect the free extent. |
| 1211 | * the permanent map should have been updated already |
| 1212 | * for the inode being freed. |
| 1213 | */ |
| 1214 | if (iagp->pmap[extno] != 0) { |
| 1215 | jfs_error(ip->i_sb, "diFree: the pmap does not show inode free"); |
| 1216 | } |
| 1217 | iagp->wmap[extno] = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1218 | PXDlength(&iagp->inoext[extno], 0); |
| 1219 | PXDaddress(&iagp->inoext[extno], 0); |
| 1220 | |
| 1221 | /* update the free extent and free inode summary maps |
| 1222 | * to reflect the freed extent. |
| 1223 | * the inode summary map is marked to indicate no inodes |
| 1224 | * available for the freed extent. |
| 1225 | */ |
| 1226 | sword = extno >> L2EXTSPERSUM; |
| 1227 | bitno = extno & (EXTSPERSUM - 1); |
| 1228 | mask = HIGHORDER >> bitno; |
| 1229 | iagp->inosmap[sword] |= cpu_to_le32(mask); |
| 1230 | iagp->extsmap[sword] &= cpu_to_le32(~mask); |
| 1231 | |
| 1232 | /* update the number of free inodes and number of free extents |
| 1233 | * for the iag. |
| 1234 | */ |
| 1235 | iagp->nfreeinos = cpu_to_le32(le32_to_cpu(iagp->nfreeinos) - |
| 1236 | (INOSPEREXT - 1)); |
| 1237 | iagp->nfreeexts = cpu_to_le32(le32_to_cpu(iagp->nfreeexts) + 1); |
| 1238 | |
| 1239 | /* update the number of free inodes and backed inodes |
| 1240 | * at the ag and inode map level. |
| 1241 | */ |
| 1242 | imap->im_agctl[agno].numfree -= (INOSPEREXT - 1); |
| 1243 | imap->im_agctl[agno].numinos -= INOSPEREXT; |
| 1244 | atomic_sub(INOSPEREXT - 1, &imap->im_numfree); |
| 1245 | atomic_sub(INOSPEREXT, &imap->im_numinos); |
| 1246 | |
| 1247 | if (amp) |
| 1248 | write_metapage(amp); |
| 1249 | if (bmp) |
| 1250 | write_metapage(bmp); |
| 1251 | if (cmp) |
| 1252 | write_metapage(cmp); |
| 1253 | if (dmp) |
| 1254 | write_metapage(dmp); |
| 1255 | |
| 1256 | /* |
| 1257 | * start transaction to update block allocation map |
| 1258 | * for the inode extent freed; |
| 1259 | * |
| 1260 | * N.B. AG_LOCK is released and iag will be released below, and |
| 1261 | * other thread may allocate inode from/reusing the ixad freed |
| 1262 | * BUT with new/different backing inode extent from the extent |
| 1263 | * to be freed by the transaction; |
| 1264 | */ |
| 1265 | tid = txBegin(ipimap->i_sb, COMMIT_FORCE); |
| 1266 | down(&JFS_IP(ipimap)->commit_sem); |
| 1267 | |
| 1268 | /* acquire tlock of the iag page of the freed ixad |
| 1269 | * to force the page NOHOMEOK (even though no data is |
| 1270 | * logged from the iag page) until NOREDOPAGE|FREEXTENT log |
| 1271 | * for the free of the extent is committed; |
| 1272 | * write FREEXTENT|NOREDOPAGE log record |
| 1273 | * N.B. linelock is overlaid as freed extent descriptor; |
| 1274 | */ |
| 1275 | tlck = txLock(tid, ipimap, mp, tlckINODE | tlckFREE); |
| 1276 | pxdlock = (struct pxd_lock *) & tlck->lock; |
| 1277 | pxdlock->flag = mlckFREEPXD; |
| 1278 | pxdlock->pxd = freepxd; |
| 1279 | pxdlock->index = 1; |
| 1280 | |
| 1281 | write_metapage(mp); |
| 1282 | |
| 1283 | iplist[0] = ipimap; |
| 1284 | |
| 1285 | /* |
| 1286 | * logredo needs the IAG number and IAG extent index in order |
| 1287 | * to ensure that the IMap is consistent. The least disruptive |
| 1288 | * way to pass these values through to the transaction manager |
| 1289 | * is in the iplist array. |
| 1290 | * |
| 1291 | * It's not pretty, but it works. |
| 1292 | */ |
| 1293 | iplist[1] = (struct inode *) (size_t)iagno; |
| 1294 | iplist[2] = (struct inode *) (size_t)extno; |
| 1295 | |
| 1296 | rc = txCommit(tid, 1, &iplist[0], COMMIT_FORCE); |
| 1297 | |
| 1298 | txEnd(tid); |
| 1299 | up(&JFS_IP(ipimap)->commit_sem); |
| 1300 | |
| 1301 | /* unlock the AG inode map information */ |
| 1302 | AG_UNLOCK(imap, agno); |
| 1303 | |
| 1304 | return (0); |
| 1305 | |
| 1306 | error_out: |
| 1307 | IREAD_UNLOCK(ipimap); |
| 1308 | |
| 1309 | if (amp) |
| 1310 | release_metapage(amp); |
| 1311 | if (bmp) |
| 1312 | release_metapage(bmp); |
| 1313 | if (cmp) |
| 1314 | release_metapage(cmp); |
| 1315 | if (dmp) |
| 1316 | release_metapage(dmp); |
| 1317 | |
| 1318 | AG_UNLOCK(imap, agno); |
| 1319 | |
| 1320 | release_metapage(mp); |
| 1321 | |
| 1322 | return (rc); |
| 1323 | } |
| 1324 | |
| 1325 | /* |
| 1326 | * There are several places in the diAlloc* routines where we initialize |
| 1327 | * the inode. |
| 1328 | */ |
| 1329 | static inline void |
| 1330 | diInitInode(struct inode *ip, int iagno, int ino, int extno, struct iag * iagp) |
| 1331 | { |
| 1332 | struct jfs_sb_info *sbi = JFS_SBI(ip->i_sb); |
| 1333 | struct jfs_inode_info *jfs_ip = JFS_IP(ip); |
| 1334 | |
| 1335 | ip->i_ino = (iagno << L2INOSPERIAG) + ino; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1336 | jfs_ip->ixpxd = iagp->inoext[extno]; |
| 1337 | jfs_ip->agno = BLKTOAG(le64_to_cpu(iagp->agstart), sbi); |
| 1338 | jfs_ip->active_ag = -1; |
| 1339 | } |
| 1340 | |
| 1341 | |
| 1342 | /* |
| 1343 | * NAME: diAlloc(pip,dir,ip) |
| 1344 | * |
| 1345 | * FUNCTION: allocate a disk inode from the inode working map |
| 1346 | * for a fileset or aggregate. |
| 1347 | * |
| 1348 | * PARAMETERS: |
| 1349 | * pip - pointer to incore inode for the parent inode. |
| 1350 | * dir - TRUE if the new disk inode is for a directory. |
| 1351 | * ip - pointer to a new inode |
| 1352 | * |
| 1353 | * RETURN VALUES: |
| 1354 | * 0 - success. |
| 1355 | * -ENOSPC - insufficient disk resources. |
| 1356 | * -EIO - i/o error. |
| 1357 | */ |
| 1358 | int diAlloc(struct inode *pip, boolean_t dir, struct inode *ip) |
| 1359 | { |
| 1360 | int rc, ino, iagno, addext, extno, bitno, sword; |
| 1361 | int nwords, rem, i, agno; |
| 1362 | u32 mask, inosmap, extsmap; |
| 1363 | struct inode *ipimap; |
| 1364 | struct metapage *mp; |
| 1365 | ino_t inum; |
| 1366 | struct iag *iagp; |
| 1367 | struct inomap *imap; |
| 1368 | |
| 1369 | /* get the pointers to the inode map inode and the |
| 1370 | * corresponding imap control structure. |
| 1371 | */ |
| 1372 | ipimap = JFS_SBI(pip->i_sb)->ipimap; |
| 1373 | imap = JFS_IP(ipimap)->i_imap; |
| 1374 | JFS_IP(ip)->ipimap = ipimap; |
| 1375 | JFS_IP(ip)->fileset = FILESYSTEM_I; |
| 1376 | |
| 1377 | /* for a directory, the allocation policy is to start |
| 1378 | * at the ag level using the preferred ag. |
| 1379 | */ |
| 1380 | if (dir == TRUE) { |
| 1381 | agno = dbNextAG(JFS_SBI(pip->i_sb)->ipbmap); |
| 1382 | AG_LOCK(imap, agno); |
| 1383 | goto tryag; |
| 1384 | } |
| 1385 | |
| 1386 | /* for files, the policy starts off by trying to allocate from |
| 1387 | * the same iag containing the parent disk inode: |
| 1388 | * try to allocate the new disk inode close to the parent disk |
| 1389 | * inode, using parent disk inode number + 1 as the allocation |
| 1390 | * hint. (we use a left-to-right policy to attempt to avoid |
| 1391 | * moving backward on the disk.) compute the hint within the |
| 1392 | * file system and the iag. |
| 1393 | */ |
| 1394 | |
| 1395 | /* get the ag number of this iag */ |
| 1396 | agno = JFS_IP(pip)->agno; |
| 1397 | |
| 1398 | if (atomic_read(&JFS_SBI(pip->i_sb)->bmap->db_active[agno])) { |
| 1399 | /* |
| 1400 | * There is an open file actively growing. We want to |
| 1401 | * allocate new inodes from a different ag to avoid |
| 1402 | * fragmentation problems. |
| 1403 | */ |
| 1404 | agno = dbNextAG(JFS_SBI(pip->i_sb)->ipbmap); |
| 1405 | AG_LOCK(imap, agno); |
| 1406 | goto tryag; |
| 1407 | } |
| 1408 | |
| 1409 | inum = pip->i_ino + 1; |
| 1410 | ino = inum & (INOSPERIAG - 1); |
| 1411 | |
| 1412 | /* back off the the hint if it is outside of the iag */ |
| 1413 | if (ino == 0) |
| 1414 | inum = pip->i_ino; |
| 1415 | |
| 1416 | /* lock the AG inode map information */ |
| 1417 | AG_LOCK(imap, agno); |
| 1418 | |
| 1419 | /* Get read lock on imap inode */ |
| 1420 | IREAD_LOCK(ipimap); |
| 1421 | |
| 1422 | /* get the iag number and read the iag */ |
| 1423 | iagno = INOTOIAG(inum); |
| 1424 | if ((rc = diIAGRead(imap, iagno, &mp))) { |
| 1425 | IREAD_UNLOCK(ipimap); |
| 1426 | AG_UNLOCK(imap, agno); |
| 1427 | return (rc); |
| 1428 | } |
| 1429 | iagp = (struct iag *) mp->data; |
| 1430 | |
| 1431 | /* determine if new inode extent is allowed to be added to the iag. |
| 1432 | * new inode extent can be added to the iag if the ag |
| 1433 | * has less than 32 free disk inodes and the iag has free extents. |
| 1434 | */ |
| 1435 | addext = (imap->im_agctl[agno].numfree < 32 && iagp->nfreeexts); |
| 1436 | |
| 1437 | /* |
| 1438 | * try to allocate from the IAG |
| 1439 | */ |
| 1440 | /* check if the inode may be allocated from the iag |
| 1441 | * (i.e. the inode has free inodes or new extent can be added). |
| 1442 | */ |
| 1443 | if (iagp->nfreeinos || addext) { |
| 1444 | /* determine the extent number of the hint. |
| 1445 | */ |
| 1446 | extno = ino >> L2INOSPEREXT; |
| 1447 | |
| 1448 | /* check if the extent containing the hint has backed |
| 1449 | * inodes. if so, try to allocate within this extent. |
| 1450 | */ |
| 1451 | if (addressPXD(&iagp->inoext[extno])) { |
| 1452 | bitno = ino & (INOSPEREXT - 1); |
| 1453 | if ((bitno = |
| 1454 | diFindFree(le32_to_cpu(iagp->wmap[extno]), |
| 1455 | bitno)) |
| 1456 | < INOSPEREXT) { |
| 1457 | ino = (extno << L2INOSPEREXT) + bitno; |
| 1458 | |
| 1459 | /* a free inode (bit) was found within this |
| 1460 | * extent, so allocate it. |
| 1461 | */ |
| 1462 | rc = diAllocBit(imap, iagp, ino); |
| 1463 | IREAD_UNLOCK(ipimap); |
| 1464 | if (rc) { |
| 1465 | assert(rc == -EIO); |
| 1466 | } else { |
| 1467 | /* set the results of the allocation |
| 1468 | * and write the iag. |
| 1469 | */ |
| 1470 | diInitInode(ip, iagno, ino, extno, |
| 1471 | iagp); |
| 1472 | mark_metapage_dirty(mp); |
| 1473 | } |
| 1474 | release_metapage(mp); |
| 1475 | |
| 1476 | /* free the AG lock and return. |
| 1477 | */ |
| 1478 | AG_UNLOCK(imap, agno); |
| 1479 | return (rc); |
| 1480 | } |
| 1481 | |
| 1482 | if (!addext) |
| 1483 | extno = |
| 1484 | (extno == |
| 1485 | EXTSPERIAG - 1) ? 0 : extno + 1; |
| 1486 | } |
| 1487 | |
| 1488 | /* |
| 1489 | * no free inodes within the extent containing the hint. |
| 1490 | * |
| 1491 | * try to allocate from the backed extents following |
| 1492 | * hint or, if appropriate (i.e. addext is true), allocate |
| 1493 | * an extent of free inodes at or following the extent |
| 1494 | * containing the hint. |
| 1495 | * |
| 1496 | * the free inode and free extent summary maps are used |
| 1497 | * here, so determine the starting summary map position |
| 1498 | * and the number of words we'll have to examine. again, |
| 1499 | * the approach is to allocate following the hint, so we |
| 1500 | * might have to initially ignore prior bits of the summary |
| 1501 | * map that represent extents prior to the extent containing |
| 1502 | * the hint and later revisit these bits. |
| 1503 | */ |
| 1504 | bitno = extno & (EXTSPERSUM - 1); |
| 1505 | nwords = (bitno == 0) ? SMAPSZ : SMAPSZ + 1; |
| 1506 | sword = extno >> L2EXTSPERSUM; |
| 1507 | |
| 1508 | /* mask any prior bits for the starting words of the |
| 1509 | * summary map. |
| 1510 | */ |
| 1511 | mask = ONES << (EXTSPERSUM - bitno); |
| 1512 | inosmap = le32_to_cpu(iagp->inosmap[sword]) | mask; |
| 1513 | extsmap = le32_to_cpu(iagp->extsmap[sword]) | mask; |
| 1514 | |
| 1515 | /* scan the free inode and free extent summary maps for |
| 1516 | * free resources. |
| 1517 | */ |
| 1518 | for (i = 0; i < nwords; i++) { |
| 1519 | /* check if this word of the free inode summary |
| 1520 | * map describes an extent with free inodes. |
| 1521 | */ |
| 1522 | if (~inosmap) { |
| 1523 | /* an extent with free inodes has been |
| 1524 | * found. determine the extent number |
| 1525 | * and the inode number within the extent. |
| 1526 | */ |
| 1527 | rem = diFindFree(inosmap, 0); |
| 1528 | extno = (sword << L2EXTSPERSUM) + rem; |
| 1529 | rem = diFindFree(le32_to_cpu(iagp->wmap[extno]), |
| 1530 | 0); |
| 1531 | if (rem >= INOSPEREXT) { |
| 1532 | IREAD_UNLOCK(ipimap); |
| 1533 | release_metapage(mp); |
| 1534 | AG_UNLOCK(imap, agno); |
| 1535 | jfs_error(ip->i_sb, |
| 1536 | "diAlloc: can't find free bit " |
| 1537 | "in wmap"); |
| 1538 | return EIO; |
| 1539 | } |
| 1540 | |
| 1541 | /* determine the inode number within the |
| 1542 | * iag and allocate the inode from the |
| 1543 | * map. |
| 1544 | */ |
| 1545 | ino = (extno << L2INOSPEREXT) + rem; |
| 1546 | rc = diAllocBit(imap, iagp, ino); |
| 1547 | IREAD_UNLOCK(ipimap); |
| 1548 | if (rc) |
| 1549 | assert(rc == -EIO); |
| 1550 | else { |
| 1551 | /* set the results of the allocation |
| 1552 | * and write the iag. |
| 1553 | */ |
| 1554 | diInitInode(ip, iagno, ino, extno, |
| 1555 | iagp); |
| 1556 | mark_metapage_dirty(mp); |
| 1557 | } |
| 1558 | release_metapage(mp); |
| 1559 | |
| 1560 | /* free the AG lock and return. |
| 1561 | */ |
| 1562 | AG_UNLOCK(imap, agno); |
| 1563 | return (rc); |
| 1564 | |
| 1565 | } |
| 1566 | |
| 1567 | /* check if we may allocate an extent of free |
| 1568 | * inodes and whether this word of the free |
| 1569 | * extents summary map describes a free extent. |
| 1570 | */ |
| 1571 | if (addext && ~extsmap) { |
| 1572 | /* a free extent has been found. determine |
| 1573 | * the extent number. |
| 1574 | */ |
| 1575 | rem = diFindFree(extsmap, 0); |
| 1576 | extno = (sword << L2EXTSPERSUM) + rem; |
| 1577 | |
| 1578 | /* allocate an extent of free inodes. |
| 1579 | */ |
| 1580 | if ((rc = diNewExt(imap, iagp, extno))) { |
| 1581 | /* if there is no disk space for a |
| 1582 | * new extent, try to allocate the |
| 1583 | * disk inode from somewhere else. |
| 1584 | */ |
| 1585 | if (rc == -ENOSPC) |
| 1586 | break; |
| 1587 | |
| 1588 | assert(rc == -EIO); |
| 1589 | } else { |
| 1590 | /* set the results of the allocation |
| 1591 | * and write the iag. |
| 1592 | */ |
| 1593 | diInitInode(ip, iagno, |
| 1594 | extno << L2INOSPEREXT, |
| 1595 | extno, iagp); |
| 1596 | mark_metapage_dirty(mp); |
| 1597 | } |
| 1598 | release_metapage(mp); |
| 1599 | /* free the imap inode & the AG lock & return. |
| 1600 | */ |
| 1601 | IREAD_UNLOCK(ipimap); |
| 1602 | AG_UNLOCK(imap, agno); |
| 1603 | return (rc); |
| 1604 | } |
| 1605 | |
| 1606 | /* move on to the next set of summary map words. |
| 1607 | */ |
| 1608 | sword = (sword == SMAPSZ - 1) ? 0 : sword + 1; |
| 1609 | inosmap = le32_to_cpu(iagp->inosmap[sword]); |
| 1610 | extsmap = le32_to_cpu(iagp->extsmap[sword]); |
| 1611 | } |
| 1612 | } |
| 1613 | /* unlock imap inode */ |
| 1614 | IREAD_UNLOCK(ipimap); |
| 1615 | |
| 1616 | /* nothing doing in this iag, so release it. */ |
| 1617 | release_metapage(mp); |
| 1618 | |
| 1619 | tryag: |
| 1620 | /* |
| 1621 | * try to allocate anywhere within the same AG as the parent inode. |
| 1622 | */ |
| 1623 | rc = diAllocAG(imap, agno, dir, ip); |
| 1624 | |
| 1625 | AG_UNLOCK(imap, agno); |
| 1626 | |
| 1627 | if (rc != -ENOSPC) |
| 1628 | return (rc); |
| 1629 | |
| 1630 | /* |
| 1631 | * try to allocate in any AG. |
| 1632 | */ |
| 1633 | return (diAllocAny(imap, agno, dir, ip)); |
| 1634 | } |
| 1635 | |
| 1636 | |
| 1637 | /* |
| 1638 | * NAME: diAllocAG(imap,agno,dir,ip) |
| 1639 | * |
| 1640 | * FUNCTION: allocate a disk inode from the allocation group. |
| 1641 | * |
| 1642 | * this routine first determines if a new extent of free |
| 1643 | * inodes should be added for the allocation group, with |
| 1644 | * the current request satisfied from this extent. if this |
| 1645 | * is the case, an attempt will be made to do just that. if |
| 1646 | * this attempt fails or it has been determined that a new |
| 1647 | * extent should not be added, an attempt is made to satisfy |
| 1648 | * the request by allocating an existing (backed) free inode |
| 1649 | * from the allocation group. |
| 1650 | * |
| 1651 | * PRE CONDITION: Already have the AG lock for this AG. |
| 1652 | * |
| 1653 | * PARAMETERS: |
| 1654 | * imap - pointer to inode map control structure. |
| 1655 | * agno - allocation group to allocate from. |
| 1656 | * dir - TRUE if the new disk inode is for a directory. |
| 1657 | * ip - pointer to the new inode to be filled in on successful return |
| 1658 | * with the disk inode number allocated, its extent address |
| 1659 | * and the start of the ag. |
| 1660 | * |
| 1661 | * RETURN VALUES: |
| 1662 | * 0 - success. |
| 1663 | * -ENOSPC - insufficient disk resources. |
| 1664 | * -EIO - i/o error. |
| 1665 | */ |
| 1666 | static int |
| 1667 | diAllocAG(struct inomap * imap, int agno, boolean_t dir, struct inode *ip) |
| 1668 | { |
| 1669 | int rc, addext, numfree, numinos; |
| 1670 | |
| 1671 | /* get the number of free and the number of backed disk |
| 1672 | * inodes currently within the ag. |
| 1673 | */ |
| 1674 | numfree = imap->im_agctl[agno].numfree; |
| 1675 | numinos = imap->im_agctl[agno].numinos; |
| 1676 | |
| 1677 | if (numfree > numinos) { |
| 1678 | jfs_error(ip->i_sb, "diAllocAG: numfree > numinos"); |
| 1679 | return -EIO; |
| 1680 | } |
| 1681 | |
| 1682 | /* determine if we should allocate a new extent of free inodes |
| 1683 | * within the ag: for directory inodes, add a new extent |
| 1684 | * if there are a small number of free inodes or number of free |
| 1685 | * inodes is a small percentage of the number of backed inodes. |
| 1686 | */ |
| 1687 | if (dir == TRUE) |
| 1688 | addext = (numfree < 64 || |
| 1689 | (numfree < 256 |
| 1690 | && ((numfree * 100) / numinos) <= 20)); |
| 1691 | else |
| 1692 | addext = (numfree == 0); |
| 1693 | |
| 1694 | /* |
| 1695 | * try to allocate a new extent of free inodes. |
| 1696 | */ |
| 1697 | if (addext) { |
| 1698 | /* if free space is not avaliable for this new extent, try |
| 1699 | * below to allocate a free and existing (already backed) |
| 1700 | * inode from the ag. |
| 1701 | */ |
| 1702 | if ((rc = diAllocExt(imap, agno, ip)) != -ENOSPC) |
| 1703 | return (rc); |
| 1704 | } |
| 1705 | |
| 1706 | /* |
| 1707 | * try to allocate an existing free inode from the ag. |
| 1708 | */ |
| 1709 | return (diAllocIno(imap, agno, ip)); |
| 1710 | } |
| 1711 | |
| 1712 | |
| 1713 | /* |
| 1714 | * NAME: diAllocAny(imap,agno,dir,iap) |
| 1715 | * |
| 1716 | * FUNCTION: allocate a disk inode from any other allocation group. |
| 1717 | * |
| 1718 | * this routine is called when an allocation attempt within |
| 1719 | * the primary allocation group has failed. if attempts to |
| 1720 | * allocate an inode from any allocation group other than the |
| 1721 | * specified primary group. |
| 1722 | * |
| 1723 | * PARAMETERS: |
| 1724 | * imap - pointer to inode map control structure. |
| 1725 | * agno - primary allocation group (to avoid). |
| 1726 | * dir - TRUE if the new disk inode is for a directory. |
| 1727 | * ip - pointer to a new inode to be filled in on successful return |
| 1728 | * with the disk inode number allocated, its extent address |
| 1729 | * and the start of the ag. |
| 1730 | * |
| 1731 | * RETURN VALUES: |
| 1732 | * 0 - success. |
| 1733 | * -ENOSPC - insufficient disk resources. |
| 1734 | * -EIO - i/o error. |
| 1735 | */ |
| 1736 | static int |
| 1737 | diAllocAny(struct inomap * imap, int agno, boolean_t dir, struct inode *ip) |
| 1738 | { |
| 1739 | int ag, rc; |
| 1740 | int maxag = JFS_SBI(imap->im_ipimap->i_sb)->bmap->db_maxag; |
| 1741 | |
| 1742 | |
| 1743 | /* try to allocate from the ags following agno up to |
| 1744 | * the maximum ag number. |
| 1745 | */ |
| 1746 | for (ag = agno + 1; ag <= maxag; ag++) { |
| 1747 | AG_LOCK(imap, ag); |
| 1748 | |
| 1749 | rc = diAllocAG(imap, ag, dir, ip); |
| 1750 | |
| 1751 | AG_UNLOCK(imap, ag); |
| 1752 | |
| 1753 | if (rc != -ENOSPC) |
| 1754 | return (rc); |
| 1755 | } |
| 1756 | |
| 1757 | /* try to allocate from the ags in front of agno. |
| 1758 | */ |
| 1759 | for (ag = 0; ag < agno; ag++) { |
| 1760 | AG_LOCK(imap, ag); |
| 1761 | |
| 1762 | rc = diAllocAG(imap, ag, dir, ip); |
| 1763 | |
| 1764 | AG_UNLOCK(imap, ag); |
| 1765 | |
| 1766 | if (rc != -ENOSPC) |
| 1767 | return (rc); |
| 1768 | } |
| 1769 | |
| 1770 | /* no free disk inodes. |
| 1771 | */ |
| 1772 | return -ENOSPC; |
| 1773 | } |
| 1774 | |
| 1775 | |
| 1776 | /* |
| 1777 | * NAME: diAllocIno(imap,agno,ip) |
| 1778 | * |
| 1779 | * FUNCTION: allocate a disk inode from the allocation group's free |
| 1780 | * inode list, returning an error if this free list is |
| 1781 | * empty (i.e. no iags on the list). |
| 1782 | * |
| 1783 | * allocation occurs from the first iag on the list using |
| 1784 | * the iag's free inode summary map to find the leftmost |
| 1785 | * free inode in the iag. |
| 1786 | * |
| 1787 | * PRE CONDITION: Already have AG lock for this AG. |
| 1788 | * |
| 1789 | * PARAMETERS: |
| 1790 | * imap - pointer to inode map control structure. |
| 1791 | * agno - allocation group. |
| 1792 | * ip - pointer to new inode to be filled in on successful return |
| 1793 | * with the disk inode number allocated, its extent address |
| 1794 | * and the start of the ag. |
| 1795 | * |
| 1796 | * RETURN VALUES: |
| 1797 | * 0 - success. |
| 1798 | * -ENOSPC - insufficient disk resources. |
| 1799 | * -EIO - i/o error. |
| 1800 | */ |
| 1801 | static int diAllocIno(struct inomap * imap, int agno, struct inode *ip) |
| 1802 | { |
| 1803 | int iagno, ino, rc, rem, extno, sword; |
| 1804 | struct metapage *mp; |
| 1805 | struct iag *iagp; |
| 1806 | |
| 1807 | /* check if there are iags on the ag's free inode list. |
| 1808 | */ |
| 1809 | if ((iagno = imap->im_agctl[agno].inofree) < 0) |
| 1810 | return -ENOSPC; |
| 1811 | |
| 1812 | /* obtain read lock on imap inode */ |
| 1813 | IREAD_LOCK(imap->im_ipimap); |
| 1814 | |
| 1815 | /* read the iag at the head of the list. |
| 1816 | */ |
| 1817 | if ((rc = diIAGRead(imap, iagno, &mp))) { |
| 1818 | IREAD_UNLOCK(imap->im_ipimap); |
| 1819 | return (rc); |
| 1820 | } |
| 1821 | iagp = (struct iag *) mp->data; |
| 1822 | |
| 1823 | /* better be free inodes in this iag if it is on the |
| 1824 | * list. |
| 1825 | */ |
| 1826 | if (!iagp->nfreeinos) { |
| 1827 | IREAD_UNLOCK(imap->im_ipimap); |
| 1828 | release_metapage(mp); |
| 1829 | jfs_error(ip->i_sb, |
| 1830 | "diAllocIno: nfreeinos = 0, but iag on freelist"); |
| 1831 | return -EIO; |
| 1832 | } |
| 1833 | |
| 1834 | /* scan the free inode summary map to find an extent |
| 1835 | * with free inodes. |
| 1836 | */ |
| 1837 | for (sword = 0;; sword++) { |
| 1838 | if (sword >= SMAPSZ) { |
| 1839 | IREAD_UNLOCK(imap->im_ipimap); |
| 1840 | release_metapage(mp); |
| 1841 | jfs_error(ip->i_sb, |
| 1842 | "diAllocIno: free inode not found in summary map"); |
| 1843 | return -EIO; |
| 1844 | } |
| 1845 | |
| 1846 | if (~iagp->inosmap[sword]) |
| 1847 | break; |
| 1848 | } |
| 1849 | |
| 1850 | /* found a extent with free inodes. determine |
| 1851 | * the extent number. |
| 1852 | */ |
| 1853 | rem = diFindFree(le32_to_cpu(iagp->inosmap[sword]), 0); |
| 1854 | if (rem >= EXTSPERSUM) { |
| 1855 | IREAD_UNLOCK(imap->im_ipimap); |
| 1856 | release_metapage(mp); |
| 1857 | jfs_error(ip->i_sb, "diAllocIno: no free extent found"); |
| 1858 | return -EIO; |
| 1859 | } |
| 1860 | extno = (sword << L2EXTSPERSUM) + rem; |
| 1861 | |
| 1862 | /* find the first free inode in the extent. |
| 1863 | */ |
| 1864 | rem = diFindFree(le32_to_cpu(iagp->wmap[extno]), 0); |
| 1865 | if (rem >= INOSPEREXT) { |
| 1866 | IREAD_UNLOCK(imap->im_ipimap); |
| 1867 | release_metapage(mp); |
| 1868 | jfs_error(ip->i_sb, "diAllocIno: free inode not found"); |
| 1869 | return -EIO; |
| 1870 | } |
| 1871 | |
| 1872 | /* compute the inode number within the iag. |
| 1873 | */ |
| 1874 | ino = (extno << L2INOSPEREXT) + rem; |
| 1875 | |
| 1876 | /* allocate the inode. |
| 1877 | */ |
| 1878 | rc = diAllocBit(imap, iagp, ino); |
| 1879 | IREAD_UNLOCK(imap->im_ipimap); |
| 1880 | if (rc) { |
| 1881 | release_metapage(mp); |
| 1882 | return (rc); |
| 1883 | } |
| 1884 | |
| 1885 | /* set the results of the allocation and write the iag. |
| 1886 | */ |
| 1887 | diInitInode(ip, iagno, ino, extno, iagp); |
| 1888 | write_metapage(mp); |
| 1889 | |
| 1890 | return (0); |
| 1891 | } |
| 1892 | |
| 1893 | |
| 1894 | /* |
| 1895 | * NAME: diAllocExt(imap,agno,ip) |
| 1896 | * |
| 1897 | * FUNCTION: add a new extent of free inodes to an iag, allocating |
| 1898 | * an inode from this extent to satisfy the current allocation |
| 1899 | * request. |
| 1900 | * |
| 1901 | * this routine first tries to find an existing iag with free |
| 1902 | * extents through the ag free extent list. if list is not |
| 1903 | * empty, the head of the list will be selected as the home |
| 1904 | * of the new extent of free inodes. otherwise (the list is |
| 1905 | * empty), a new iag will be allocated for the ag to contain |
| 1906 | * the extent. |
| 1907 | * |
| 1908 | * once an iag has been selected, the free extent summary map |
| 1909 | * is used to locate a free extent within the iag and diNewExt() |
| 1910 | * is called to initialize the extent, with initialization |
| 1911 | * including the allocation of the first inode of the extent |
| 1912 | * for the purpose of satisfying this request. |
| 1913 | * |
| 1914 | * PARAMETERS: |
| 1915 | * imap - pointer to inode map control structure. |
| 1916 | * agno - allocation group number. |
| 1917 | * ip - pointer to new inode to be filled in on successful return |
| 1918 | * with the disk inode number allocated, its extent address |
| 1919 | * and the start of the ag. |
| 1920 | * |
| 1921 | * RETURN VALUES: |
| 1922 | * 0 - success. |
| 1923 | * -ENOSPC - insufficient disk resources. |
| 1924 | * -EIO - i/o error. |
| 1925 | */ |
| 1926 | static int diAllocExt(struct inomap * imap, int agno, struct inode *ip) |
| 1927 | { |
| 1928 | int rem, iagno, sword, extno, rc; |
| 1929 | struct metapage *mp; |
| 1930 | struct iag *iagp; |
| 1931 | |
| 1932 | /* check if the ag has any iags with free extents. if not, |
| 1933 | * allocate a new iag for the ag. |
| 1934 | */ |
| 1935 | if ((iagno = imap->im_agctl[agno].extfree) < 0) { |
| 1936 | /* If successful, diNewIAG will obtain the read lock on the |
| 1937 | * imap inode. |
| 1938 | */ |
| 1939 | if ((rc = diNewIAG(imap, &iagno, agno, &mp))) { |
| 1940 | return (rc); |
| 1941 | } |
| 1942 | iagp = (struct iag *) mp->data; |
| 1943 | |
| 1944 | /* set the ag number if this a brand new iag |
| 1945 | */ |
| 1946 | iagp->agstart = |
| 1947 | cpu_to_le64(AGTOBLK(agno, imap->im_ipimap)); |
| 1948 | } else { |
| 1949 | /* read the iag. |
| 1950 | */ |
| 1951 | IREAD_LOCK(imap->im_ipimap); |
| 1952 | if ((rc = diIAGRead(imap, iagno, &mp))) { |
| 1953 | IREAD_UNLOCK(imap->im_ipimap); |
| 1954 | jfs_error(ip->i_sb, "diAllocExt: error reading iag"); |
| 1955 | return rc; |
| 1956 | } |
| 1957 | iagp = (struct iag *) mp->data; |
| 1958 | } |
| 1959 | |
| 1960 | /* using the free extent summary map, find a free extent. |
| 1961 | */ |
| 1962 | for (sword = 0;; sword++) { |
| 1963 | if (sword >= SMAPSZ) { |
| 1964 | release_metapage(mp); |
| 1965 | IREAD_UNLOCK(imap->im_ipimap); |
| 1966 | jfs_error(ip->i_sb, |
| 1967 | "diAllocExt: free ext summary map not found"); |
| 1968 | return -EIO; |
| 1969 | } |
| 1970 | if (~iagp->extsmap[sword]) |
| 1971 | break; |
| 1972 | } |
| 1973 | |
| 1974 | /* determine the extent number of the free extent. |
| 1975 | */ |
| 1976 | rem = diFindFree(le32_to_cpu(iagp->extsmap[sword]), 0); |
| 1977 | if (rem >= EXTSPERSUM) { |
| 1978 | release_metapage(mp); |
| 1979 | IREAD_UNLOCK(imap->im_ipimap); |
| 1980 | jfs_error(ip->i_sb, "diAllocExt: free extent not found"); |
| 1981 | return -EIO; |
| 1982 | } |
| 1983 | extno = (sword << L2EXTSPERSUM) + rem; |
| 1984 | |
| 1985 | /* initialize the new extent. |
| 1986 | */ |
| 1987 | rc = diNewExt(imap, iagp, extno); |
| 1988 | IREAD_UNLOCK(imap->im_ipimap); |
| 1989 | if (rc) { |
| 1990 | /* something bad happened. if a new iag was allocated, |
| 1991 | * place it back on the inode map's iag free list, and |
| 1992 | * clear the ag number information. |
| 1993 | */ |
| 1994 | if (iagp->nfreeexts == cpu_to_le32(EXTSPERIAG)) { |
| 1995 | IAGFREE_LOCK(imap); |
| 1996 | iagp->iagfree = cpu_to_le32(imap->im_freeiag); |
| 1997 | imap->im_freeiag = iagno; |
| 1998 | IAGFREE_UNLOCK(imap); |
| 1999 | } |
| 2000 | write_metapage(mp); |
| 2001 | return (rc); |
| 2002 | } |
| 2003 | |
| 2004 | /* set the results of the allocation and write the iag. |
| 2005 | */ |
| 2006 | diInitInode(ip, iagno, extno << L2INOSPEREXT, extno, iagp); |
| 2007 | |
| 2008 | write_metapage(mp); |
| 2009 | |
| 2010 | return (0); |
| 2011 | } |
| 2012 | |
| 2013 | |
| 2014 | /* |
| 2015 | * NAME: diAllocBit(imap,iagp,ino) |
| 2016 | * |
| 2017 | * FUNCTION: allocate a backed inode from an iag. |
| 2018 | * |
| 2019 | * this routine performs the mechanics of allocating a |
| 2020 | * specified inode from a backed extent. |
| 2021 | * |
| 2022 | * if the inode to be allocated represents the last free |
| 2023 | * inode within the iag, the iag will be removed from the |
| 2024 | * ag free inode list. |
| 2025 | * |
| 2026 | * a careful update approach is used to provide consistency |
| 2027 | * in the face of updates to multiple buffers. under this |
| 2028 | * approach, all required buffers are obtained before making |
| 2029 | * any updates and are held all are updates are complete. |
| 2030 | * |
| 2031 | * PRE CONDITION: Already have buffer lock on iagp. Already have AG lock on |
| 2032 | * this AG. Must have read lock on imap inode. |
| 2033 | * |
| 2034 | * PARAMETERS: |
| 2035 | * imap - pointer to inode map control structure. |
| 2036 | * iagp - pointer to iag. |
| 2037 | * ino - inode number to be allocated within the iag. |
| 2038 | * |
| 2039 | * RETURN VALUES: |
| 2040 | * 0 - success. |
| 2041 | * -ENOSPC - insufficient disk resources. |
| 2042 | * -EIO - i/o error. |
| 2043 | */ |
| 2044 | static int diAllocBit(struct inomap * imap, struct iag * iagp, int ino) |
| 2045 | { |
| 2046 | int extno, bitno, agno, sword, rc; |
| 2047 | struct metapage *amp = NULL, *bmp = NULL; |
| 2048 | struct iag *aiagp = NULL, *biagp = NULL; |
| 2049 | u32 mask; |
| 2050 | |
| 2051 | /* check if this is the last free inode within the iag. |
| 2052 | * if so, it will have to be removed from the ag free |
| 2053 | * inode list, so get the iags preceeding and following |
| 2054 | * it on the list. |
| 2055 | */ |
| 2056 | if (iagp->nfreeinos == cpu_to_le32(1)) { |
| 2057 | if ((int) le32_to_cpu(iagp->inofreefwd) >= 0) { |
| 2058 | if ((rc = |
| 2059 | diIAGRead(imap, le32_to_cpu(iagp->inofreefwd), |
| 2060 | &))) |
| 2061 | return (rc); |
| 2062 | aiagp = (struct iag *) amp->data; |
| 2063 | } |
| 2064 | |
| 2065 | if ((int) le32_to_cpu(iagp->inofreeback) >= 0) { |
| 2066 | if ((rc = |
| 2067 | diIAGRead(imap, |
| 2068 | le32_to_cpu(iagp->inofreeback), |
| 2069 | &bmp))) { |
| 2070 | if (amp) |
| 2071 | release_metapage(amp); |
| 2072 | return (rc); |
| 2073 | } |
| 2074 | biagp = (struct iag *) bmp->data; |
| 2075 | } |
| 2076 | } |
| 2077 | |
| 2078 | /* get the ag number, extent number, inode number within |
| 2079 | * the extent. |
| 2080 | */ |
| 2081 | agno = BLKTOAG(le64_to_cpu(iagp->agstart), JFS_SBI(imap->im_ipimap->i_sb)); |
| 2082 | extno = ino >> L2INOSPEREXT; |
| 2083 | bitno = ino & (INOSPEREXT - 1); |
| 2084 | |
| 2085 | /* compute the mask for setting the map. |
| 2086 | */ |
| 2087 | mask = HIGHORDER >> bitno; |
| 2088 | |
| 2089 | /* the inode should be free and backed. |
| 2090 | */ |
| 2091 | if (((le32_to_cpu(iagp->pmap[extno]) & mask) != 0) || |
| 2092 | ((le32_to_cpu(iagp->wmap[extno]) & mask) != 0) || |
| 2093 | (addressPXD(&iagp->inoext[extno]) == 0)) { |
| 2094 | if (amp) |
| 2095 | release_metapage(amp); |
| 2096 | if (bmp) |
| 2097 | release_metapage(bmp); |
| 2098 | |
| 2099 | jfs_error(imap->im_ipimap->i_sb, |
| 2100 | "diAllocBit: iag inconsistent"); |
| 2101 | return -EIO; |
| 2102 | } |
| 2103 | |
| 2104 | /* mark the inode as allocated in the working map. |
| 2105 | */ |
| 2106 | iagp->wmap[extno] |= cpu_to_le32(mask); |
| 2107 | |
| 2108 | /* check if all inodes within the extent are now |
| 2109 | * allocated. if so, update the free inode summary |
| 2110 | * map to reflect this. |
| 2111 | */ |
| 2112 | if (iagp->wmap[extno] == cpu_to_le32(ONES)) { |
| 2113 | sword = extno >> L2EXTSPERSUM; |
| 2114 | bitno = extno & (EXTSPERSUM - 1); |
| 2115 | iagp->inosmap[sword] |= cpu_to_le32(HIGHORDER >> bitno); |
| 2116 | } |
| 2117 | |
| 2118 | /* if this was the last free inode in the iag, remove the |
| 2119 | * iag from the ag free inode list. |
| 2120 | */ |
| 2121 | if (iagp->nfreeinos == cpu_to_le32(1)) { |
| 2122 | if (amp) { |
| 2123 | aiagp->inofreeback = iagp->inofreeback; |
| 2124 | write_metapage(amp); |
| 2125 | } |
| 2126 | |
| 2127 | if (bmp) { |
| 2128 | biagp->inofreefwd = iagp->inofreefwd; |
| 2129 | write_metapage(bmp); |
| 2130 | } else { |
| 2131 | imap->im_agctl[agno].inofree = |
| 2132 | le32_to_cpu(iagp->inofreefwd); |
| 2133 | } |
| 2134 | iagp->inofreefwd = iagp->inofreeback = cpu_to_le32(-1); |
| 2135 | } |
| 2136 | |
| 2137 | /* update the free inode count at the iag, ag, inode |
| 2138 | * map levels. |
| 2139 | */ |
| 2140 | iagp->nfreeinos = cpu_to_le32(le32_to_cpu(iagp->nfreeinos) - 1); |
| 2141 | imap->im_agctl[agno].numfree -= 1; |
| 2142 | atomic_dec(&imap->im_numfree); |
| 2143 | |
| 2144 | return (0); |
| 2145 | } |
| 2146 | |
| 2147 | |
| 2148 | /* |
| 2149 | * NAME: diNewExt(imap,iagp,extno) |
| 2150 | * |
| 2151 | * FUNCTION: initialize a new extent of inodes for an iag, allocating |
| 2152 | * the first inode of the extent for use for the current |
| 2153 | * allocation request. |
| 2154 | * |
| 2155 | * disk resources are allocated for the new extent of inodes |
| 2156 | * and the inodes themselves are initialized to reflect their |
| 2157 | * existence within the extent (i.e. their inode numbers and |
| 2158 | * inode extent addresses are set) and their initial state |
| 2159 | * (mode and link count are set to zero). |
| 2160 | * |
| 2161 | * if the iag is new, it is not yet on an ag extent free list |
| 2162 | * but will now be placed on this list. |
| 2163 | * |
| 2164 | * if the allocation of the new extent causes the iag to |
| 2165 | * have no free extent, the iag will be removed from the |
| 2166 | * ag extent free list. |
| 2167 | * |
| 2168 | * if the iag has no free backed inodes, it will be placed |
| 2169 | * on the ag free inode list, since the addition of the new |
| 2170 | * extent will now cause it to have free inodes. |
| 2171 | * |
| 2172 | * a careful update approach is used to provide consistency |
| 2173 | * (i.e. list consistency) in the face of updates to multiple |
| 2174 | * buffers. under this approach, all required buffers are |
| 2175 | * obtained before making any updates and are held until all |
| 2176 | * updates are complete. |
| 2177 | * |
| 2178 | * PRE CONDITION: Already have buffer lock on iagp. Already have AG lock on |
| 2179 | * this AG. Must have read lock on imap inode. |
| 2180 | * |
| 2181 | * PARAMETERS: |
| 2182 | * imap - pointer to inode map control structure. |
| 2183 | * iagp - pointer to iag. |
| 2184 | * extno - extent number. |
| 2185 | * |
| 2186 | * RETURN VALUES: |
| 2187 | * 0 - success. |
| 2188 | * -ENOSPC - insufficient disk resources. |
| 2189 | * -EIO - i/o error. |
| 2190 | */ |
| 2191 | static int diNewExt(struct inomap * imap, struct iag * iagp, int extno) |
| 2192 | { |
| 2193 | int agno, iagno, fwd, back, freei = 0, sword, rc; |
| 2194 | struct iag *aiagp = NULL, *biagp = NULL, *ciagp = NULL; |
| 2195 | struct metapage *amp, *bmp, *cmp, *dmp; |
| 2196 | struct inode *ipimap; |
| 2197 | s64 blkno, hint; |
| 2198 | int i, j; |
| 2199 | u32 mask; |
| 2200 | ino_t ino; |
| 2201 | struct dinode *dp; |
| 2202 | struct jfs_sb_info *sbi; |
| 2203 | |
| 2204 | /* better have free extents. |
| 2205 | */ |
| 2206 | if (!iagp->nfreeexts) { |
| 2207 | jfs_error(imap->im_ipimap->i_sb, "diNewExt: no free extents"); |
| 2208 | return -EIO; |
| 2209 | } |
| 2210 | |
| 2211 | /* get the inode map inode. |
| 2212 | */ |
| 2213 | ipimap = imap->im_ipimap; |
| 2214 | sbi = JFS_SBI(ipimap->i_sb); |
| 2215 | |
| 2216 | amp = bmp = cmp = NULL; |
| 2217 | |
| 2218 | /* get the ag and iag numbers for this iag. |
| 2219 | */ |
| 2220 | agno = BLKTOAG(le64_to_cpu(iagp->agstart), sbi); |
| 2221 | iagno = le32_to_cpu(iagp->iagnum); |
| 2222 | |
| 2223 | /* check if this is the last free extent within the |
| 2224 | * iag. if so, the iag must be removed from the ag |
| 2225 | * free extent list, so get the iags preceeding and |
| 2226 | * following the iag on this list. |
| 2227 | */ |
| 2228 | if (iagp->nfreeexts == cpu_to_le32(1)) { |
| 2229 | if ((fwd = le32_to_cpu(iagp->extfreefwd)) >= 0) { |
| 2230 | if ((rc = diIAGRead(imap, fwd, &))) |
| 2231 | return (rc); |
| 2232 | aiagp = (struct iag *) amp->data; |
| 2233 | } |
| 2234 | |
| 2235 | if ((back = le32_to_cpu(iagp->extfreeback)) >= 0) { |
| 2236 | if ((rc = diIAGRead(imap, back, &bmp))) |
| 2237 | goto error_out; |
| 2238 | biagp = (struct iag *) bmp->data; |
| 2239 | } |
| 2240 | } else { |
| 2241 | /* the iag has free extents. if all extents are free |
| 2242 | * (as is the case for a newly allocated iag), the iag |
| 2243 | * must be added to the ag free extent list, so get |
| 2244 | * the iag at the head of the list in preparation for |
| 2245 | * adding this iag to this list. |
| 2246 | */ |
| 2247 | fwd = back = -1; |
| 2248 | if (iagp->nfreeexts == cpu_to_le32(EXTSPERIAG)) { |
| 2249 | if ((fwd = imap->im_agctl[agno].extfree) >= 0) { |
| 2250 | if ((rc = diIAGRead(imap, fwd, &))) |
| 2251 | goto error_out; |
| 2252 | aiagp = (struct iag *) amp->data; |
| 2253 | } |
| 2254 | } |
| 2255 | } |
| 2256 | |
| 2257 | /* check if the iag has no free inodes. if so, the iag |
| 2258 | * will have to be added to the ag free inode list, so get |
| 2259 | * the iag at the head of the list in preparation for |
| 2260 | * adding this iag to this list. in doing this, we must |
| 2261 | * check if we already have the iag at the head of |
| 2262 | * the list in hand. |
| 2263 | */ |
| 2264 | if (iagp->nfreeinos == 0) { |
| 2265 | freei = imap->im_agctl[agno].inofree; |
| 2266 | |
| 2267 | if (freei >= 0) { |
| 2268 | if (freei == fwd) { |
| 2269 | ciagp = aiagp; |
| 2270 | } else if (freei == back) { |
| 2271 | ciagp = biagp; |
| 2272 | } else { |
| 2273 | if ((rc = diIAGRead(imap, freei, &cmp))) |
| 2274 | goto error_out; |
| 2275 | ciagp = (struct iag *) cmp->data; |
| 2276 | } |
| 2277 | if (ciagp == NULL) { |
| 2278 | jfs_error(imap->im_ipimap->i_sb, |
| 2279 | "diNewExt: ciagp == NULL"); |
| 2280 | rc = -EIO; |
| 2281 | goto error_out; |
| 2282 | } |
| 2283 | } |
| 2284 | } |
| 2285 | |
| 2286 | /* allocate disk space for the inode extent. |
| 2287 | */ |
| 2288 | if ((extno == 0) || (addressPXD(&iagp->inoext[extno - 1]) == 0)) |
| 2289 | hint = ((s64) agno << sbi->bmap->db_agl2size) - 1; |
| 2290 | else |
| 2291 | hint = addressPXD(&iagp->inoext[extno - 1]) + |
| 2292 | lengthPXD(&iagp->inoext[extno - 1]) - 1; |
| 2293 | |
| 2294 | if ((rc = dbAlloc(ipimap, hint, (s64) imap->im_nbperiext, &blkno))) |
| 2295 | goto error_out; |
| 2296 | |
| 2297 | /* compute the inode number of the first inode within the |
| 2298 | * extent. |
| 2299 | */ |
| 2300 | ino = (iagno << L2INOSPERIAG) + (extno << L2INOSPEREXT); |
| 2301 | |
| 2302 | /* initialize the inodes within the newly allocated extent a |
| 2303 | * page at a time. |
| 2304 | */ |
| 2305 | for (i = 0; i < imap->im_nbperiext; i += sbi->nbperpage) { |
| 2306 | /* get a buffer for this page of disk inodes. |
| 2307 | */ |
| 2308 | dmp = get_metapage(ipimap, blkno + i, PSIZE, 1); |
| 2309 | if (dmp == NULL) { |
| 2310 | rc = -EIO; |
| 2311 | goto error_out; |
| 2312 | } |
| 2313 | dp = (struct dinode *) dmp->data; |
| 2314 | |
| 2315 | /* initialize the inode number, mode, link count and |
| 2316 | * inode extent address. |
| 2317 | */ |
| 2318 | for (j = 0; j < INOSPERPAGE; j++, dp++, ino++) { |
| 2319 | dp->di_inostamp = cpu_to_le32(sbi->inostamp); |
| 2320 | dp->di_number = cpu_to_le32(ino); |
| 2321 | dp->di_fileset = cpu_to_le32(FILESYSTEM_I); |
| 2322 | dp->di_mode = 0; |
| 2323 | dp->di_nlink = 0; |
| 2324 | PXDaddress(&(dp->di_ixpxd), blkno); |
| 2325 | PXDlength(&(dp->di_ixpxd), imap->im_nbperiext); |
| 2326 | } |
| 2327 | write_metapage(dmp); |
| 2328 | } |
| 2329 | |
| 2330 | /* if this is the last free extent within the iag, remove the |
| 2331 | * iag from the ag free extent list. |
| 2332 | */ |
| 2333 | if (iagp->nfreeexts == cpu_to_le32(1)) { |
| 2334 | if (fwd >= 0) |
| 2335 | aiagp->extfreeback = iagp->extfreeback; |
| 2336 | |
| 2337 | if (back >= 0) |
| 2338 | biagp->extfreefwd = iagp->extfreefwd; |
| 2339 | else |
| 2340 | imap->im_agctl[agno].extfree = |
| 2341 | le32_to_cpu(iagp->extfreefwd); |
| 2342 | |
| 2343 | iagp->extfreefwd = iagp->extfreeback = cpu_to_le32(-1); |
| 2344 | } else { |
| 2345 | /* if the iag has all free extents (newly allocated iag), |
| 2346 | * add the iag to the ag free extent list. |
| 2347 | */ |
| 2348 | if (iagp->nfreeexts == cpu_to_le32(EXTSPERIAG)) { |
| 2349 | if (fwd >= 0) |
| 2350 | aiagp->extfreeback = cpu_to_le32(iagno); |
| 2351 | |
| 2352 | iagp->extfreefwd = cpu_to_le32(fwd); |
| 2353 | iagp->extfreeback = cpu_to_le32(-1); |
| 2354 | imap->im_agctl[agno].extfree = iagno; |
| 2355 | } |
| 2356 | } |
| 2357 | |
| 2358 | /* if the iag has no free inodes, add the iag to the |
| 2359 | * ag free inode list. |
| 2360 | */ |
| 2361 | if (iagp->nfreeinos == 0) { |
| 2362 | if (freei >= 0) |
| 2363 | ciagp->inofreeback = cpu_to_le32(iagno); |
| 2364 | |
| 2365 | iagp->inofreefwd = |
| 2366 | cpu_to_le32(imap->im_agctl[agno].inofree); |
| 2367 | iagp->inofreeback = cpu_to_le32(-1); |
| 2368 | imap->im_agctl[agno].inofree = iagno; |
| 2369 | } |
| 2370 | |
| 2371 | /* initialize the extent descriptor of the extent. */ |
| 2372 | PXDlength(&iagp->inoext[extno], imap->im_nbperiext); |
| 2373 | PXDaddress(&iagp->inoext[extno], blkno); |
| 2374 | |
| 2375 | /* initialize the working and persistent map of the extent. |
| 2376 | * the working map will be initialized such that |
| 2377 | * it indicates the first inode of the extent is allocated. |
| 2378 | */ |
| 2379 | iagp->wmap[extno] = cpu_to_le32(HIGHORDER); |
| 2380 | iagp->pmap[extno] = 0; |
| 2381 | |
| 2382 | /* update the free inode and free extent summary maps |
| 2383 | * for the extent to indicate the extent has free inodes |
| 2384 | * and no longer represents a free extent. |
| 2385 | */ |
| 2386 | sword = extno >> L2EXTSPERSUM; |
| 2387 | mask = HIGHORDER >> (extno & (EXTSPERSUM - 1)); |
| 2388 | iagp->extsmap[sword] |= cpu_to_le32(mask); |
| 2389 | iagp->inosmap[sword] &= cpu_to_le32(~mask); |
| 2390 | |
| 2391 | /* update the free inode and free extent counts for the |
| 2392 | * iag. |
| 2393 | */ |
| 2394 | iagp->nfreeinos = cpu_to_le32(le32_to_cpu(iagp->nfreeinos) + |
| 2395 | (INOSPEREXT - 1)); |
| 2396 | iagp->nfreeexts = cpu_to_le32(le32_to_cpu(iagp->nfreeexts) - 1); |
| 2397 | |
| 2398 | /* update the free and backed inode counts for the ag. |
| 2399 | */ |
| 2400 | imap->im_agctl[agno].numfree += (INOSPEREXT - 1); |
| 2401 | imap->im_agctl[agno].numinos += INOSPEREXT; |
| 2402 | |
| 2403 | /* update the free and backed inode counts for the inode map. |
| 2404 | */ |
| 2405 | atomic_add(INOSPEREXT - 1, &imap->im_numfree); |
| 2406 | atomic_add(INOSPEREXT, &imap->im_numinos); |
| 2407 | |
| 2408 | /* write the iags. |
| 2409 | */ |
| 2410 | if (amp) |
| 2411 | write_metapage(amp); |
| 2412 | if (bmp) |
| 2413 | write_metapage(bmp); |
| 2414 | if (cmp) |
| 2415 | write_metapage(cmp); |
| 2416 | |
| 2417 | return (0); |
| 2418 | |
| 2419 | error_out: |
| 2420 | |
| 2421 | /* release the iags. |
| 2422 | */ |
| 2423 | if (amp) |
| 2424 | release_metapage(amp); |
| 2425 | if (bmp) |
| 2426 | release_metapage(bmp); |
| 2427 | if (cmp) |
| 2428 | release_metapage(cmp); |
| 2429 | |
| 2430 | return (rc); |
| 2431 | } |
| 2432 | |
| 2433 | |
| 2434 | /* |
| 2435 | * NAME: diNewIAG(imap,iagnop,agno) |
| 2436 | * |
| 2437 | * FUNCTION: allocate a new iag for an allocation group. |
| 2438 | * |
| 2439 | * first tries to allocate the iag from the inode map |
| 2440 | * iagfree list: |
| 2441 | * if the list has free iags, the head of the list is removed |
| 2442 | * and returned to satisfy the request. |
| 2443 | * if the inode map's iag free list is empty, the inode map |
| 2444 | * is extended to hold a new iag. this new iag is initialized |
| 2445 | * and returned to satisfy the request. |
| 2446 | * |
| 2447 | * PARAMETERS: |
| 2448 | * imap - pointer to inode map control structure. |
| 2449 | * iagnop - pointer to an iag number set with the number of the |
| 2450 | * newly allocated iag upon successful return. |
| 2451 | * agno - allocation group number. |
| 2452 | * bpp - Buffer pointer to be filled in with new IAG's buffer |
| 2453 | * |
| 2454 | * RETURN VALUES: |
| 2455 | * 0 - success. |
| 2456 | * -ENOSPC - insufficient disk resources. |
| 2457 | * -EIO - i/o error. |
| 2458 | * |
| 2459 | * serialization: |
| 2460 | * AG lock held on entry/exit; |
| 2461 | * write lock on the map is held inside; |
| 2462 | * read lock on the map is held on successful completion; |
| 2463 | * |
| 2464 | * note: new iag transaction: |
| 2465 | * . synchronously write iag; |
| 2466 | * . write log of xtree and inode of imap; |
| 2467 | * . commit; |
| 2468 | * . synchronous write of xtree (right to left, bottom to top); |
| 2469 | * . at start of logredo(): init in-memory imap with one additional iag page; |
| 2470 | * . at end of logredo(): re-read imap inode to determine |
| 2471 | * new imap size; |
| 2472 | */ |
| 2473 | static int |
| 2474 | diNewIAG(struct inomap * imap, int *iagnop, int agno, struct metapage ** mpp) |
| 2475 | { |
| 2476 | int rc; |
| 2477 | int iagno, i, xlen; |
| 2478 | struct inode *ipimap; |
| 2479 | struct super_block *sb; |
| 2480 | struct jfs_sb_info *sbi; |
| 2481 | struct metapage *mp; |
| 2482 | struct iag *iagp; |
| 2483 | s64 xaddr = 0; |
| 2484 | s64 blkno; |
| 2485 | tid_t tid; |
| 2486 | #ifdef _STILL_TO_PORT |
| 2487 | xad_t xad; |
| 2488 | #endif /* _STILL_TO_PORT */ |
| 2489 | struct inode *iplist[1]; |
| 2490 | |
| 2491 | /* pick up pointers to the inode map and mount inodes */ |
| 2492 | ipimap = imap->im_ipimap; |
| 2493 | sb = ipimap->i_sb; |
| 2494 | sbi = JFS_SBI(sb); |
| 2495 | |
| 2496 | /* acquire the free iag lock */ |
| 2497 | IAGFREE_LOCK(imap); |
| 2498 | |
| 2499 | /* if there are any iags on the inode map free iag list, |
| 2500 | * allocate the iag from the head of the list. |
| 2501 | */ |
| 2502 | if (imap->im_freeiag >= 0) { |
| 2503 | /* pick up the iag number at the head of the list */ |
| 2504 | iagno = imap->im_freeiag; |
| 2505 | |
| 2506 | /* determine the logical block number of the iag */ |
| 2507 | blkno = IAGTOLBLK(iagno, sbi->l2nbperpage); |
| 2508 | } else { |
| 2509 | /* no free iags. the inode map will have to be extented |
| 2510 | * to include a new iag. |
| 2511 | */ |
| 2512 | |
| 2513 | /* acquire inode map lock */ |
| 2514 | IWRITE_LOCK(ipimap); |
| 2515 | |
| 2516 | if (ipimap->i_size >> L2PSIZE != imap->im_nextiag + 1) { |
| 2517 | IWRITE_UNLOCK(ipimap); |
| 2518 | IAGFREE_UNLOCK(imap); |
| 2519 | jfs_error(imap->im_ipimap->i_sb, |
| 2520 | "diNewIAG: ipimap->i_size is wrong"); |
| 2521 | return -EIO; |
| 2522 | } |
| 2523 | |
| 2524 | |
| 2525 | /* get the next avaliable iag number */ |
| 2526 | iagno = imap->im_nextiag; |
| 2527 | |
| 2528 | /* make sure that we have not exceeded the maximum inode |
| 2529 | * number limit. |
| 2530 | */ |
| 2531 | if (iagno > (MAXIAGS - 1)) { |
| 2532 | /* release the inode map lock */ |
| 2533 | IWRITE_UNLOCK(ipimap); |
| 2534 | |
| 2535 | rc = -ENOSPC; |
| 2536 | goto out; |
| 2537 | } |
| 2538 | |
| 2539 | /* |
| 2540 | * synchronously append new iag page. |
| 2541 | */ |
| 2542 | /* determine the logical address of iag page to append */ |
| 2543 | blkno = IAGTOLBLK(iagno, sbi->l2nbperpage); |
| 2544 | |
| 2545 | /* Allocate extent for new iag page */ |
| 2546 | xlen = sbi->nbperpage; |
| 2547 | if ((rc = dbAlloc(ipimap, 0, (s64) xlen, &xaddr))) { |
| 2548 | /* release the inode map lock */ |
| 2549 | IWRITE_UNLOCK(ipimap); |
| 2550 | |
| 2551 | goto out; |
| 2552 | } |
| 2553 | |
Dave Kleikamp | d2e8370 | 2005-05-02 12:24:51 -0600 | [diff] [blame] | 2554 | /* |
| 2555 | * start transaction of update of the inode map |
| 2556 | * addressing structure pointing to the new iag page; |
| 2557 | */ |
| 2558 | tid = txBegin(sb, COMMIT_FORCE); |
| 2559 | down(&JFS_IP(ipimap)->commit_sem); |
| 2560 | |
| 2561 | /* update the inode map addressing structure to point to it */ |
| 2562 | if ((rc = |
| 2563 | xtInsert(tid, ipimap, 0, blkno, xlen, &xaddr, 0))) { |
| 2564 | txEnd(tid); |
| 2565 | up(&JFS_IP(ipimap)->commit_sem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2566 | /* Free the blocks allocated for the iag since it was |
| 2567 | * not successfully added to the inode map |
| 2568 | */ |
| 2569 | dbFree(ipimap, xaddr, (s64) xlen); |
| 2570 | |
| 2571 | /* release the inode map lock */ |
| 2572 | IWRITE_UNLOCK(ipimap); |
| 2573 | |
Dave Kleikamp | d2e8370 | 2005-05-02 12:24:51 -0600 | [diff] [blame] | 2574 | goto out; |
| 2575 | } |
| 2576 | |
| 2577 | /* update the inode map's inode to reflect the extension */ |
| 2578 | ipimap->i_size += PSIZE; |
| 2579 | inode_add_bytes(ipimap, PSIZE); |
| 2580 | |
| 2581 | /* assign a buffer for the page */ |
| 2582 | mp = get_metapage(ipimap, blkno, PSIZE, 0); |
| 2583 | if (!mp) { |
| 2584 | /* |
| 2585 | * This is very unlikely since we just created the |
| 2586 | * extent, but let's try to handle it correctly |
| 2587 | */ |
| 2588 | xtTruncate(tid, ipimap, ipimap->i_size - PSIZE, |
| 2589 | COMMIT_PWMAP); |
| 2590 | |
| 2591 | txAbort(tid, 0); |
| 2592 | txEnd(tid); |
| 2593 | |
| 2594 | /* release the inode map lock */ |
| 2595 | IWRITE_UNLOCK(ipimap); |
| 2596 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2597 | rc = -EIO; |
| 2598 | goto out; |
| 2599 | } |
| 2600 | iagp = (struct iag *) mp->data; |
| 2601 | |
| 2602 | /* init the iag */ |
| 2603 | memset(iagp, 0, sizeof(struct iag)); |
| 2604 | iagp->iagnum = cpu_to_le32(iagno); |
| 2605 | iagp->inofreefwd = iagp->inofreeback = cpu_to_le32(-1); |
| 2606 | iagp->extfreefwd = iagp->extfreeback = cpu_to_le32(-1); |
| 2607 | iagp->iagfree = cpu_to_le32(-1); |
| 2608 | iagp->nfreeinos = 0; |
| 2609 | iagp->nfreeexts = cpu_to_le32(EXTSPERIAG); |
| 2610 | |
| 2611 | /* initialize the free inode summary map (free extent |
| 2612 | * summary map initialization handled by bzero). |
| 2613 | */ |
| 2614 | for (i = 0; i < SMAPSZ; i++) |
| 2615 | iagp->inosmap[i] = cpu_to_le32(ONES); |
| 2616 | |
| 2617 | /* |
Dave Kleikamp | d2e8370 | 2005-05-02 12:24:51 -0600 | [diff] [blame] | 2618 | * Write and sync the metapage |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2619 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2620 | flush_metapage(mp); |
| 2621 | |
| 2622 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2623 | * txCommit(COMMIT_FORCE) will synchronously write address |
| 2624 | * index pages and inode after commit in careful update order |
| 2625 | * of address index pages (right to left, bottom up); |
| 2626 | */ |
| 2627 | iplist[0] = ipimap; |
| 2628 | rc = txCommit(tid, 1, &iplist[0], COMMIT_FORCE); |
| 2629 | |
| 2630 | txEnd(tid); |
| 2631 | up(&JFS_IP(ipimap)->commit_sem); |
| 2632 | |
| 2633 | duplicateIXtree(sb, blkno, xlen, &xaddr); |
| 2634 | |
| 2635 | /* update the next avaliable iag number */ |
| 2636 | imap->im_nextiag += 1; |
| 2637 | |
| 2638 | /* Add the iag to the iag free list so we don't lose the iag |
| 2639 | * if a failure happens now. |
| 2640 | */ |
| 2641 | imap->im_freeiag = iagno; |
| 2642 | |
| 2643 | /* Until we have logredo working, we want the imap inode & |
| 2644 | * control page to be up to date. |
| 2645 | */ |
| 2646 | diSync(ipimap); |
| 2647 | |
| 2648 | /* release the inode map lock */ |
| 2649 | IWRITE_UNLOCK(ipimap); |
| 2650 | } |
| 2651 | |
| 2652 | /* obtain read lock on map */ |
| 2653 | IREAD_LOCK(ipimap); |
| 2654 | |
| 2655 | /* read the iag */ |
| 2656 | if ((rc = diIAGRead(imap, iagno, &mp))) { |
| 2657 | IREAD_UNLOCK(ipimap); |
| 2658 | rc = -EIO; |
| 2659 | goto out; |
| 2660 | } |
| 2661 | iagp = (struct iag *) mp->data; |
| 2662 | |
| 2663 | /* remove the iag from the iag free list */ |
| 2664 | imap->im_freeiag = le32_to_cpu(iagp->iagfree); |
| 2665 | iagp->iagfree = cpu_to_le32(-1); |
| 2666 | |
| 2667 | /* set the return iag number and buffer pointer */ |
| 2668 | *iagnop = iagno; |
| 2669 | *mpp = mp; |
| 2670 | |
| 2671 | out: |
| 2672 | /* release the iag free lock */ |
| 2673 | IAGFREE_UNLOCK(imap); |
| 2674 | |
| 2675 | return (rc); |
| 2676 | } |
| 2677 | |
| 2678 | /* |
| 2679 | * NAME: diIAGRead() |
| 2680 | * |
| 2681 | * FUNCTION: get the buffer for the specified iag within a fileset |
| 2682 | * or aggregate inode map. |
| 2683 | * |
| 2684 | * PARAMETERS: |
| 2685 | * imap - pointer to inode map control structure. |
| 2686 | * iagno - iag number. |
| 2687 | * bpp - point to buffer pointer to be filled in on successful |
| 2688 | * exit. |
| 2689 | * |
| 2690 | * SERIALIZATION: |
| 2691 | * must have read lock on imap inode |
| 2692 | * (When called by diExtendFS, the filesystem is quiesced, therefore |
| 2693 | * the read lock is unnecessary.) |
| 2694 | * |
| 2695 | * RETURN VALUES: |
| 2696 | * 0 - success. |
| 2697 | * -EIO - i/o error. |
| 2698 | */ |
| 2699 | static int diIAGRead(struct inomap * imap, int iagno, struct metapage ** mpp) |
| 2700 | { |
| 2701 | struct inode *ipimap = imap->im_ipimap; |
| 2702 | s64 blkno; |
| 2703 | |
| 2704 | /* compute the logical block number of the iag. */ |
| 2705 | blkno = IAGTOLBLK(iagno, JFS_SBI(ipimap->i_sb)->l2nbperpage); |
| 2706 | |
| 2707 | /* read the iag. */ |
| 2708 | *mpp = read_metapage(ipimap, blkno, PSIZE, 0); |
| 2709 | if (*mpp == NULL) { |
| 2710 | return -EIO; |
| 2711 | } |
| 2712 | |
| 2713 | return (0); |
| 2714 | } |
| 2715 | |
| 2716 | /* |
| 2717 | * NAME: diFindFree() |
| 2718 | * |
| 2719 | * FUNCTION: find the first free bit in a word starting at |
| 2720 | * the specified bit position. |
| 2721 | * |
| 2722 | * PARAMETERS: |
| 2723 | * word - word to be examined. |
| 2724 | * start - starting bit position. |
| 2725 | * |
| 2726 | * RETURN VALUES: |
| 2727 | * bit position of first free bit in the word or 32 if |
| 2728 | * no free bits were found. |
| 2729 | */ |
| 2730 | static int diFindFree(u32 word, int start) |
| 2731 | { |
| 2732 | int bitno; |
| 2733 | assert(start < 32); |
| 2734 | /* scan the word for the first free bit. */ |
| 2735 | for (word <<= start, bitno = start; bitno < 32; |
| 2736 | bitno++, word <<= 1) { |
| 2737 | if ((word & HIGHORDER) == 0) |
| 2738 | break; |
| 2739 | } |
| 2740 | return (bitno); |
| 2741 | } |
| 2742 | |
| 2743 | /* |
| 2744 | * NAME: diUpdatePMap() |
| 2745 | * |
| 2746 | * FUNCTION: Update the persistent map in an IAG for the allocation or |
| 2747 | * freeing of the specified inode. |
| 2748 | * |
| 2749 | * PRE CONDITIONS: Working map has already been updated for allocate. |
| 2750 | * |
| 2751 | * PARAMETERS: |
| 2752 | * ipimap - Incore inode map inode |
| 2753 | * inum - Number of inode to mark in permanent map |
| 2754 | * is_free - If TRUE indicates inode should be marked freed, otherwise |
| 2755 | * indicates inode should be marked allocated. |
| 2756 | * |
| 2757 | * RETURN VALUES: |
| 2758 | * 0 for success |
| 2759 | */ |
| 2760 | int |
| 2761 | diUpdatePMap(struct inode *ipimap, |
| 2762 | unsigned long inum, boolean_t is_free, struct tblock * tblk) |
| 2763 | { |
| 2764 | int rc; |
| 2765 | struct iag *iagp; |
| 2766 | struct metapage *mp; |
| 2767 | int iagno, ino, extno, bitno; |
| 2768 | struct inomap *imap; |
| 2769 | u32 mask; |
| 2770 | struct jfs_log *log; |
| 2771 | int lsn, difft, diffp; |
Dave Kleikamp | 7fab479 | 2005-05-02 12:25:02 -0600 | [diff] [blame] | 2772 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2773 | |
| 2774 | imap = JFS_IP(ipimap)->i_imap; |
| 2775 | /* get the iag number containing the inode */ |
| 2776 | iagno = INOTOIAG(inum); |
| 2777 | /* make sure that the iag is contained within the map */ |
| 2778 | if (iagno >= imap->im_nextiag) { |
| 2779 | jfs_error(ipimap->i_sb, |
| 2780 | "diUpdatePMap: the iag is outside the map"); |
| 2781 | return -EIO; |
| 2782 | } |
| 2783 | /* read the iag */ |
| 2784 | IREAD_LOCK(ipimap); |
| 2785 | rc = diIAGRead(imap, iagno, &mp); |
| 2786 | IREAD_UNLOCK(ipimap); |
| 2787 | if (rc) |
| 2788 | return (rc); |
Dave Kleikamp | 7fab479 | 2005-05-02 12:25:02 -0600 | [diff] [blame] | 2789 | metapage_wait_for_io(mp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2790 | iagp = (struct iag *) mp->data; |
| 2791 | /* get the inode number and extent number of the inode within |
| 2792 | * the iag and the inode number within the extent. |
| 2793 | */ |
| 2794 | ino = inum & (INOSPERIAG - 1); |
| 2795 | extno = ino >> L2INOSPEREXT; |
| 2796 | bitno = ino & (INOSPEREXT - 1); |
| 2797 | mask = HIGHORDER >> bitno; |
| 2798 | /* |
| 2799 | * mark the inode free in persistent map: |
| 2800 | */ |
| 2801 | if (is_free == TRUE) { |
| 2802 | /* The inode should have been allocated both in working |
| 2803 | * map and in persistent map; |
| 2804 | * the inode will be freed from working map at the release |
| 2805 | * of last reference release; |
| 2806 | */ |
| 2807 | if (!(le32_to_cpu(iagp->wmap[extno]) & mask)) { |
| 2808 | jfs_error(ipimap->i_sb, |
| 2809 | "diUpdatePMap: inode %ld not marked as " |
| 2810 | "allocated in wmap!", inum); |
| 2811 | } |
| 2812 | if (!(le32_to_cpu(iagp->pmap[extno]) & mask)) { |
| 2813 | jfs_error(ipimap->i_sb, |
| 2814 | "diUpdatePMap: inode %ld not marked as " |
| 2815 | "allocated in pmap!", inum); |
| 2816 | } |
| 2817 | /* update the bitmap for the extent of the freed inode */ |
| 2818 | iagp->pmap[extno] &= cpu_to_le32(~mask); |
| 2819 | } |
| 2820 | /* |
| 2821 | * mark the inode allocated in persistent map: |
| 2822 | */ |
| 2823 | else { |
| 2824 | /* The inode should be already allocated in the working map |
| 2825 | * and should be free in persistent map; |
| 2826 | */ |
| 2827 | if (!(le32_to_cpu(iagp->wmap[extno]) & mask)) { |
| 2828 | release_metapage(mp); |
| 2829 | jfs_error(ipimap->i_sb, |
| 2830 | "diUpdatePMap: the inode is not allocated in " |
| 2831 | "the working map"); |
| 2832 | return -EIO; |
| 2833 | } |
| 2834 | if ((le32_to_cpu(iagp->pmap[extno]) & mask) != 0) { |
| 2835 | release_metapage(mp); |
| 2836 | jfs_error(ipimap->i_sb, |
| 2837 | "diUpdatePMap: the inode is not free in the " |
| 2838 | "persistent map"); |
| 2839 | return -EIO; |
| 2840 | } |
| 2841 | /* update the bitmap for the extent of the allocated inode */ |
| 2842 | iagp->pmap[extno] |= cpu_to_le32(mask); |
| 2843 | } |
| 2844 | /* |
| 2845 | * update iag lsn |
| 2846 | */ |
| 2847 | lsn = tblk->lsn; |
| 2848 | log = JFS_SBI(tblk->sb)->log; |
| 2849 | if (mp->lsn != 0) { |
| 2850 | /* inherit older/smaller lsn */ |
| 2851 | logdiff(difft, lsn, log); |
| 2852 | logdiff(diffp, mp->lsn, log); |
Dave Kleikamp | 7fab479 | 2005-05-02 12:25:02 -0600 | [diff] [blame] | 2853 | LOGSYNC_LOCK(log, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2854 | if (difft < diffp) { |
| 2855 | mp->lsn = lsn; |
| 2856 | /* move mp after tblock in logsync list */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2857 | list_move(&mp->synclist, &tblk->synclist); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2858 | } |
| 2859 | /* inherit younger/larger clsn */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2860 | assert(mp->clsn); |
| 2861 | logdiff(difft, tblk->clsn, log); |
| 2862 | logdiff(diffp, mp->clsn, log); |
| 2863 | if (difft > diffp) |
| 2864 | mp->clsn = tblk->clsn; |
Dave Kleikamp | 7fab479 | 2005-05-02 12:25:02 -0600 | [diff] [blame] | 2865 | LOGSYNC_UNLOCK(log, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2866 | } else { |
| 2867 | mp->log = log; |
| 2868 | mp->lsn = lsn; |
| 2869 | /* insert mp after tblock in logsync list */ |
Dave Kleikamp | 7fab479 | 2005-05-02 12:25:02 -0600 | [diff] [blame] | 2870 | LOGSYNC_LOCK(log, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2871 | log->count++; |
| 2872 | list_add(&mp->synclist, &tblk->synclist); |
| 2873 | mp->clsn = tblk->clsn; |
Dave Kleikamp | 7fab479 | 2005-05-02 12:25:02 -0600 | [diff] [blame] | 2874 | LOGSYNC_UNLOCK(log, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2875 | } |
| 2876 | write_metapage(mp); |
| 2877 | return (0); |
| 2878 | } |
| 2879 | |
| 2880 | /* |
| 2881 | * diExtendFS() |
| 2882 | * |
| 2883 | * function: update imap for extendfs(); |
| 2884 | * |
| 2885 | * note: AG size has been increased s.t. each k old contiguous AGs are |
| 2886 | * coalesced into a new AG; |
| 2887 | */ |
| 2888 | int diExtendFS(struct inode *ipimap, struct inode *ipbmap) |
| 2889 | { |
| 2890 | int rc, rcx = 0; |
| 2891 | struct inomap *imap = JFS_IP(ipimap)->i_imap; |
| 2892 | struct iag *iagp = NULL, *hiagp = NULL; |
| 2893 | struct bmap *mp = JFS_SBI(ipbmap->i_sb)->bmap; |
| 2894 | struct metapage *bp, *hbp; |
| 2895 | int i, n, head; |
| 2896 | int numinos, xnuminos = 0, xnumfree = 0; |
| 2897 | s64 agstart; |
| 2898 | |
| 2899 | jfs_info("diExtendFS: nextiag:%d numinos:%d numfree:%d", |
| 2900 | imap->im_nextiag, atomic_read(&imap->im_numinos), |
| 2901 | atomic_read(&imap->im_numfree)); |
| 2902 | |
| 2903 | /* |
| 2904 | * reconstruct imap |
| 2905 | * |
| 2906 | * coalesce contiguous k (newAGSize/oldAGSize) AGs; |
| 2907 | * i.e., (AGi, ..., AGj) where i = k*n and j = k*(n+1) - 1 to AGn; |
| 2908 | * note: new AG size = old AG size * (2**x). |
| 2909 | */ |
| 2910 | |
| 2911 | /* init per AG control information im_agctl[] */ |
| 2912 | for (i = 0; i < MAXAG; i++) { |
| 2913 | imap->im_agctl[i].inofree = -1; |
| 2914 | imap->im_agctl[i].extfree = -1; |
| 2915 | imap->im_agctl[i].numinos = 0; /* number of backed inodes */ |
| 2916 | imap->im_agctl[i].numfree = 0; /* number of free backed inodes */ |
| 2917 | } |
| 2918 | |
| 2919 | /* |
| 2920 | * process each iag page of the map. |
| 2921 | * |
| 2922 | * rebuild AG Free Inode List, AG Free Inode Extent List; |
| 2923 | */ |
| 2924 | for (i = 0; i < imap->im_nextiag; i++) { |
| 2925 | if ((rc = diIAGRead(imap, i, &bp))) { |
| 2926 | rcx = rc; |
| 2927 | continue; |
| 2928 | } |
| 2929 | iagp = (struct iag *) bp->data; |
| 2930 | if (le32_to_cpu(iagp->iagnum) != i) { |
| 2931 | release_metapage(bp); |
| 2932 | jfs_error(ipimap->i_sb, |
| 2933 | "diExtendFs: unexpected value of iagnum"); |
| 2934 | return -EIO; |
| 2935 | } |
| 2936 | |
| 2937 | /* leave free iag in the free iag list */ |
| 2938 | if (iagp->nfreeexts == cpu_to_le32(EXTSPERIAG)) { |
| 2939 | release_metapage(bp); |
| 2940 | continue; |
| 2941 | } |
| 2942 | |
| 2943 | /* agstart that computes to the same ag is treated as same; */ |
| 2944 | agstart = le64_to_cpu(iagp->agstart); |
| 2945 | /* iagp->agstart = agstart & ~(mp->db_agsize - 1); */ |
| 2946 | n = agstart >> mp->db_agl2size; |
| 2947 | |
| 2948 | /* compute backed inodes */ |
| 2949 | numinos = (EXTSPERIAG - le32_to_cpu(iagp->nfreeexts)) |
| 2950 | << L2INOSPEREXT; |
| 2951 | if (numinos > 0) { |
| 2952 | /* merge AG backed inodes */ |
| 2953 | imap->im_agctl[n].numinos += numinos; |
| 2954 | xnuminos += numinos; |
| 2955 | } |
| 2956 | |
| 2957 | /* if any backed free inodes, insert at AG free inode list */ |
| 2958 | if ((int) le32_to_cpu(iagp->nfreeinos) > 0) { |
| 2959 | if ((head = imap->im_agctl[n].inofree) == -1) { |
| 2960 | iagp->inofreefwd = cpu_to_le32(-1); |
| 2961 | iagp->inofreeback = cpu_to_le32(-1); |
| 2962 | } else { |
| 2963 | if ((rc = diIAGRead(imap, head, &hbp))) { |
| 2964 | rcx = rc; |
| 2965 | goto nextiag; |
| 2966 | } |
| 2967 | hiagp = (struct iag *) hbp->data; |
| 2968 | hiagp->inofreeback = iagp->iagnum; |
| 2969 | iagp->inofreefwd = cpu_to_le32(head); |
| 2970 | iagp->inofreeback = cpu_to_le32(-1); |
| 2971 | write_metapage(hbp); |
| 2972 | } |
| 2973 | |
| 2974 | imap->im_agctl[n].inofree = |
| 2975 | le32_to_cpu(iagp->iagnum); |
| 2976 | |
| 2977 | /* merge AG backed free inodes */ |
| 2978 | imap->im_agctl[n].numfree += |
| 2979 | le32_to_cpu(iagp->nfreeinos); |
| 2980 | xnumfree += le32_to_cpu(iagp->nfreeinos); |
| 2981 | } |
| 2982 | |
| 2983 | /* if any free extents, insert at AG free extent list */ |
| 2984 | if (le32_to_cpu(iagp->nfreeexts) > 0) { |
| 2985 | if ((head = imap->im_agctl[n].extfree) == -1) { |
| 2986 | iagp->extfreefwd = cpu_to_le32(-1); |
| 2987 | iagp->extfreeback = cpu_to_le32(-1); |
| 2988 | } else { |
| 2989 | if ((rc = diIAGRead(imap, head, &hbp))) { |
| 2990 | rcx = rc; |
| 2991 | goto nextiag; |
| 2992 | } |
| 2993 | hiagp = (struct iag *) hbp->data; |
| 2994 | hiagp->extfreeback = iagp->iagnum; |
| 2995 | iagp->extfreefwd = cpu_to_le32(head); |
| 2996 | iagp->extfreeback = cpu_to_le32(-1); |
| 2997 | write_metapage(hbp); |
| 2998 | } |
| 2999 | |
| 3000 | imap->im_agctl[n].extfree = |
| 3001 | le32_to_cpu(iagp->iagnum); |
| 3002 | } |
| 3003 | |
| 3004 | nextiag: |
| 3005 | write_metapage(bp); |
| 3006 | } |
| 3007 | |
| 3008 | if (xnuminos != atomic_read(&imap->im_numinos) || |
| 3009 | xnumfree != atomic_read(&imap->im_numfree)) { |
| 3010 | jfs_error(ipimap->i_sb, |
| 3011 | "diExtendFs: numinos or numfree incorrect"); |
| 3012 | return -EIO; |
| 3013 | } |
| 3014 | |
| 3015 | return rcx; |
| 3016 | } |
| 3017 | |
| 3018 | |
| 3019 | /* |
| 3020 | * duplicateIXtree() |
| 3021 | * |
| 3022 | * serialization: IWRITE_LOCK held on entry/exit |
| 3023 | * |
| 3024 | * note: shadow page with regular inode (rel.2); |
| 3025 | */ |
| 3026 | static void duplicateIXtree(struct super_block *sb, s64 blkno, |
| 3027 | int xlen, s64 *xaddr) |
| 3028 | { |
| 3029 | struct jfs_superblock *j_sb; |
| 3030 | struct buffer_head *bh; |
| 3031 | struct inode *ip; |
| 3032 | tid_t tid; |
| 3033 | |
| 3034 | /* if AIT2 ipmap2 is bad, do not try to update it */ |
| 3035 | if (JFS_SBI(sb)->mntflag & JFS_BAD_SAIT) /* s_flag */ |
| 3036 | return; |
| 3037 | ip = diReadSpecial(sb, FILESYSTEM_I, 1); |
| 3038 | if (ip == NULL) { |
| 3039 | JFS_SBI(sb)->mntflag |= JFS_BAD_SAIT; |
| 3040 | if (readSuper(sb, &bh)) |
| 3041 | return; |
| 3042 | j_sb = (struct jfs_superblock *)bh->b_data; |
| 3043 | j_sb->s_flag |= cpu_to_le32(JFS_BAD_SAIT); |
| 3044 | |
| 3045 | mark_buffer_dirty(bh); |
| 3046 | sync_dirty_buffer(bh); |
| 3047 | brelse(bh); |
| 3048 | return; |
| 3049 | } |
| 3050 | |
| 3051 | /* start transaction */ |
| 3052 | tid = txBegin(sb, COMMIT_FORCE); |
| 3053 | /* update the inode map addressing structure to point to it */ |
| 3054 | if (xtInsert(tid, ip, 0, blkno, xlen, xaddr, 0)) { |
| 3055 | JFS_SBI(sb)->mntflag |= JFS_BAD_SAIT; |
| 3056 | txAbort(tid, 1); |
| 3057 | goto cleanup; |
| 3058 | |
| 3059 | } |
| 3060 | /* update the inode map's inode to reflect the extension */ |
| 3061 | ip->i_size += PSIZE; |
| 3062 | inode_add_bytes(ip, PSIZE); |
| 3063 | txCommit(tid, 1, &ip, COMMIT_FORCE); |
| 3064 | cleanup: |
| 3065 | txEnd(tid); |
| 3066 | diFreeSpecial(ip); |
| 3067 | } |
| 3068 | |
| 3069 | /* |
| 3070 | * NAME: copy_from_dinode() |
| 3071 | * |
| 3072 | * FUNCTION: Copies inode info from disk inode to in-memory inode |
| 3073 | * |
| 3074 | * RETURN VALUES: |
| 3075 | * 0 - success |
| 3076 | * -ENOMEM - insufficient memory |
| 3077 | */ |
| 3078 | static int copy_from_dinode(struct dinode * dip, struct inode *ip) |
| 3079 | { |
| 3080 | struct jfs_inode_info *jfs_ip = JFS_IP(ip); |
| 3081 | |
| 3082 | jfs_ip->fileset = le32_to_cpu(dip->di_fileset); |
| 3083 | jfs_ip->mode2 = le32_to_cpu(dip->di_mode); |
| 3084 | |
| 3085 | ip->i_mode = le32_to_cpu(dip->di_mode) & 0xffff; |
| 3086 | ip->i_nlink = le32_to_cpu(dip->di_nlink); |
| 3087 | ip->i_uid = le32_to_cpu(dip->di_uid); |
| 3088 | ip->i_gid = le32_to_cpu(dip->di_gid); |
| 3089 | ip->i_size = le64_to_cpu(dip->di_size); |
| 3090 | ip->i_atime.tv_sec = le32_to_cpu(dip->di_atime.tv_sec); |
| 3091 | ip->i_atime.tv_nsec = le32_to_cpu(dip->di_atime.tv_nsec); |
| 3092 | ip->i_mtime.tv_sec = le32_to_cpu(dip->di_mtime.tv_sec); |
| 3093 | ip->i_mtime.tv_nsec = le32_to_cpu(dip->di_mtime.tv_nsec); |
| 3094 | ip->i_ctime.tv_sec = le32_to_cpu(dip->di_ctime.tv_sec); |
| 3095 | ip->i_ctime.tv_nsec = le32_to_cpu(dip->di_ctime.tv_nsec); |
| 3096 | ip->i_blksize = ip->i_sb->s_blocksize; |
| 3097 | ip->i_blocks = LBLK2PBLK(ip->i_sb, le64_to_cpu(dip->di_nblocks)); |
| 3098 | ip->i_generation = le32_to_cpu(dip->di_gen); |
| 3099 | |
| 3100 | jfs_ip->ixpxd = dip->di_ixpxd; /* in-memory pxd's are little-endian */ |
| 3101 | jfs_ip->acl = dip->di_acl; /* as are dxd's */ |
| 3102 | jfs_ip->ea = dip->di_ea; |
| 3103 | jfs_ip->next_index = le32_to_cpu(dip->di_next_index); |
| 3104 | jfs_ip->otime = le32_to_cpu(dip->di_otime.tv_sec); |
| 3105 | jfs_ip->acltype = le32_to_cpu(dip->di_acltype); |
| 3106 | |
| 3107 | if (S_ISCHR(ip->i_mode) || S_ISBLK(ip->i_mode)) { |
| 3108 | jfs_ip->dev = le32_to_cpu(dip->di_rdev); |
| 3109 | ip->i_rdev = new_decode_dev(jfs_ip->dev); |
| 3110 | } |
| 3111 | |
| 3112 | if (S_ISDIR(ip->i_mode)) { |
| 3113 | memcpy(&jfs_ip->i_dirtable, &dip->di_dirtable, 384); |
| 3114 | } else if (S_ISREG(ip->i_mode) || S_ISLNK(ip->i_mode)) { |
| 3115 | memcpy(&jfs_ip->i_xtroot, &dip->di_xtroot, 288); |
| 3116 | } else |
| 3117 | memcpy(&jfs_ip->i_inline_ea, &dip->di_inlineea, 128); |
| 3118 | |
| 3119 | /* Zero the in-memory-only stuff */ |
| 3120 | jfs_ip->cflag = 0; |
| 3121 | jfs_ip->btindex = 0; |
| 3122 | jfs_ip->btorder = 0; |
| 3123 | jfs_ip->bxflag = 0; |
| 3124 | jfs_ip->blid = 0; |
| 3125 | jfs_ip->atlhead = 0; |
| 3126 | jfs_ip->atltail = 0; |
| 3127 | jfs_ip->xtlid = 0; |
| 3128 | return (0); |
| 3129 | } |
| 3130 | |
| 3131 | /* |
| 3132 | * NAME: copy_to_dinode() |
| 3133 | * |
| 3134 | * FUNCTION: Copies inode info from in-memory inode to disk inode |
| 3135 | */ |
| 3136 | static void copy_to_dinode(struct dinode * dip, struct inode *ip) |
| 3137 | { |
| 3138 | struct jfs_inode_info *jfs_ip = JFS_IP(ip); |
| 3139 | |
| 3140 | dip->di_fileset = cpu_to_le32(jfs_ip->fileset); |
| 3141 | dip->di_inostamp = cpu_to_le32(JFS_SBI(ip->i_sb)->inostamp); |
| 3142 | dip->di_number = cpu_to_le32(ip->i_ino); |
| 3143 | dip->di_gen = cpu_to_le32(ip->i_generation); |
| 3144 | dip->di_size = cpu_to_le64(ip->i_size); |
| 3145 | dip->di_nblocks = cpu_to_le64(PBLK2LBLK(ip->i_sb, ip->i_blocks)); |
| 3146 | dip->di_nlink = cpu_to_le32(ip->i_nlink); |
| 3147 | dip->di_uid = cpu_to_le32(ip->i_uid); |
| 3148 | dip->di_gid = cpu_to_le32(ip->i_gid); |
| 3149 | /* |
| 3150 | * mode2 is only needed for storing the higher order bits. |
| 3151 | * Trust i_mode for the lower order ones |
| 3152 | */ |
| 3153 | dip->di_mode = cpu_to_le32((jfs_ip->mode2 & 0xffff0000) | ip->i_mode); |
| 3154 | dip->di_atime.tv_sec = cpu_to_le32(ip->i_atime.tv_sec); |
| 3155 | dip->di_atime.tv_nsec = cpu_to_le32(ip->i_atime.tv_nsec); |
| 3156 | dip->di_ctime.tv_sec = cpu_to_le32(ip->i_ctime.tv_sec); |
| 3157 | dip->di_ctime.tv_nsec = cpu_to_le32(ip->i_ctime.tv_nsec); |
| 3158 | dip->di_mtime.tv_sec = cpu_to_le32(ip->i_mtime.tv_sec); |
| 3159 | dip->di_mtime.tv_nsec = cpu_to_le32(ip->i_mtime.tv_nsec); |
| 3160 | dip->di_ixpxd = jfs_ip->ixpxd; /* in-memory pxd's are little-endian */ |
| 3161 | dip->di_acl = jfs_ip->acl; /* as are dxd's */ |
| 3162 | dip->di_ea = jfs_ip->ea; |
| 3163 | dip->di_next_index = cpu_to_le32(jfs_ip->next_index); |
| 3164 | dip->di_otime.tv_sec = cpu_to_le32(jfs_ip->otime); |
| 3165 | dip->di_otime.tv_nsec = 0; |
| 3166 | dip->di_acltype = cpu_to_le32(jfs_ip->acltype); |
| 3167 | if (S_ISCHR(ip->i_mode) || S_ISBLK(ip->i_mode)) |
| 3168 | dip->di_rdev = cpu_to_le32(jfs_ip->dev); |
| 3169 | } |