jfs_dmap.c (95d465fd750897ab32462a6702fbfe1b122cbbc0) jfs_dmap.c (4d81715fc5dfa1680ad47d7edf3ac4a74c5bf104)
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 *

--- 389 unchanged lines hidden (view full) ---

398 * FUNCTION: update the allocation state (free or allocate) of the
399 * specified block range in the persistent block allocation map.
400 *
401 * the blocks will be updated in the persistent map one
402 * dmap at a time.
403 *
404 * PARAMETERS:
405 * ipbmap - pointer to in-core inode for the block map.
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 *

--- 389 unchanged lines hidden (view full) ---

398 * FUNCTION: update the allocation state (free or allocate) of the
399 * specified block range in the persistent block allocation map.
400 *
401 * the blocks will be updated in the persistent map one
402 * dmap at a time.
403 *
404 * PARAMETERS:
405 * ipbmap - pointer to in-core inode for the block map.
406 * free - TRUE if block range is to be freed from the persistent
407 * map; FALSE if it is to be allocated.
406 * free - 'true' if block range is to be freed from the persistent
407 * map; 'false' if it is to be allocated.
408 * blkno - starting block number of the range.
409 * nblocks - number of contiguous blocks in the range.
410 * tblk - transaction block;
411 *
412 * RETURN VALUES:
413 * 0 - success
414 * -EIO - i/o error
415 */

--- 1973 unchanged lines hidden (view full) ---

2389 * be adjusted.
2390 * PARAMETERS:
2391 * bmp - pointer to bmap descriptor
2392 * blkno - the first block of a block range within a dmap. it is
2393 * the allocation or deallocation of this block range that
2394 * requires the dmap control page to be adjusted.
2395 * newval - the new value of the lower level dmap or dmap control
2396 * page root.
408 * blkno - starting block number of the range.
409 * nblocks - number of contiguous blocks in the range.
410 * tblk - transaction block;
411 *
412 * RETURN VALUES:
413 * 0 - success
414 * -EIO - i/o error
415 */

--- 1973 unchanged lines hidden (view full) ---

2389 * be adjusted.
2390 * PARAMETERS:
2391 * bmp - pointer to bmap descriptor
2392 * blkno - the first block of a block range within a dmap. it is
2393 * the allocation or deallocation of this block range that
2394 * requires the dmap control page to be adjusted.
2395 * newval - the new value of the lower level dmap or dmap control
2396 * page root.
2397 * alloc - TRUE if adjustment is due to an allocation.
2397 * alloc - 'true' if adjustment is due to an allocation.
2398 * level - current level of dmap control page (i.e. L0, L1, L2) to
2399 * be adjusted.
2400 *
2401 * RETURN VALUES:
2402 * 0 - success
2403 * -EIO - i/o error
2404 *
2405 * serialization: IREAD_LOCK(ipbmap) or IWRITE_LOCK(ipbmap) held on entry/exit;

--- 879 unchanged lines hidden (view full) ---

3285 * L2L1L0d0,...,dnL0d0,...,dnL0d0,...,dnL1L0d0,...,dnL0d0,...,dnL0d0,..dm
3286 *
3287 * <---old---><----------------------------extend----------------------->
3288 */
3289int dbExtendFS(struct inode *ipbmap, s64 blkno, s64 nblocks)
3290{
3291 struct jfs_sb_info *sbi = JFS_SBI(ipbmap->i_sb);
3292 int nbperpage = sbi->nbperpage;
2398 * level - current level of dmap control page (i.e. L0, L1, L2) to
2399 * be adjusted.
2400 *
2401 * RETURN VALUES:
2402 * 0 - success
2403 * -EIO - i/o error
2404 *
2405 * serialization: IREAD_LOCK(ipbmap) or IWRITE_LOCK(ipbmap) held on entry/exit;

--- 879 unchanged lines hidden (view full) ---

3285 * L2L1L0d0,...,dnL0d0,...,dnL0d0,...,dnL1L0d0,...,dnL0d0,...,dnL0d0,..dm
3286 *
3287 * <---old---><----------------------------extend----------------------->
3288 */
3289int dbExtendFS(struct inode *ipbmap, s64 blkno, s64 nblocks)
3290{
3291 struct jfs_sb_info *sbi = JFS_SBI(ipbmap->i_sb);
3292 int nbperpage = sbi->nbperpage;
3293 int i, i0 = TRUE, j, j0 = TRUE, k, n;
3293 int i, i0 = true, j, j0 = true, k, n;
3294 s64 newsize;
3295 s64 p;
3296 struct metapage *mp, *l2mp, *l1mp = NULL, *l0mp = NULL;
3297 struct dmapctl *l2dcp, *l1dcp, *l0dcp;
3298 struct dmap *dp;
3299 s8 *l0leaf, *l1leaf, *l2leaf;
3300 struct bmap *bmp = sbi->bmap;
3301 int agno, l2agsize, oldl2agsize;

--- 91 unchanged lines hidden (view full) ---

3393 if (l1mp == NULL)
3394 goto errout;
3395 l1dcp = (struct dmapctl *) l1mp->data;
3396
3397 /* compute start L0 */
3398 j = (blkno & (MAXL1SIZE - 1)) >> L2MAXL0SIZE;
3399 l1leaf = l1dcp->stree + CTLLEAFIND + j;
3400 p = BLKTOL0(blkno, sbi->l2nbperpage);
3294 s64 newsize;
3295 s64 p;
3296 struct metapage *mp, *l2mp, *l1mp = NULL, *l0mp = NULL;
3297 struct dmapctl *l2dcp, *l1dcp, *l0dcp;
3298 struct dmap *dp;
3299 s8 *l0leaf, *l1leaf, *l2leaf;
3300 struct bmap *bmp = sbi->bmap;
3301 int agno, l2agsize, oldl2agsize;

--- 91 unchanged lines hidden (view full) ---

3393 if (l1mp == NULL)
3394 goto errout;
3395 l1dcp = (struct dmapctl *) l1mp->data;
3396
3397 /* compute start L0 */
3398 j = (blkno & (MAXL1SIZE - 1)) >> L2MAXL0SIZE;
3399 l1leaf = l1dcp->stree + CTLLEAFIND + j;
3400 p = BLKTOL0(blkno, sbi->l2nbperpage);
3401 j0 = FALSE;
3401 j0 = false;
3402 } else {
3403 /* assign/init L1 page */
3404 l1mp = get_metapage(ipbmap, p, PSIZE, 0);
3405 if (l1mp == NULL)
3406 goto errout;
3407
3408 l1dcp = (struct dmapctl *) l1mp->data;
3409

--- 17 unchanged lines hidden (view full) ---

3427 l0dcp = (struct dmapctl *) l0mp->data;
3428
3429 /* compute start dmap */
3430 i = (blkno & (MAXL0SIZE - 1)) >>
3431 L2BPERDMAP;
3432 l0leaf = l0dcp->stree + CTLLEAFIND + i;
3433 p = BLKTODMAP(blkno,
3434 sbi->l2nbperpage);
3402 } else {
3403 /* assign/init L1 page */
3404 l1mp = get_metapage(ipbmap, p, PSIZE, 0);
3405 if (l1mp == NULL)
3406 goto errout;
3407
3408 l1dcp = (struct dmapctl *) l1mp->data;
3409

--- 17 unchanged lines hidden (view full) ---

3427 l0dcp = (struct dmapctl *) l0mp->data;
3428
3429 /* compute start dmap */
3430 i = (blkno & (MAXL0SIZE - 1)) >>
3431 L2BPERDMAP;
3432 l0leaf = l0dcp->stree + CTLLEAFIND + i;
3433 p = BLKTODMAP(blkno,
3434 sbi->l2nbperpage);
3435 i0 = FALSE;
3435 i0 = false;
3436 } else {
3437 /* assign/init L0 page */
3438 l0mp = get_metapage(ipbmap, p, PSIZE, 0);
3439 if (l0mp == NULL)
3440 goto errout;
3441
3442 l0dcp = (struct dmapctl *) l0mp->data;
3443

--- 556 unchanged lines hidden --- 		3436 } else {
3437 /* assign/init L0 page */
3438 l0mp = get_metapage(ipbmap, p, PSIZE, 0);
3439 if (l0mp == NULL)
3440 goto errout;
3441
3442 l0dcp = (struct dmapctl *) l0mp->data;
3443

--- 556 unchanged lines hidden ---