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This commit is contained in:
Simon Gardling
2024-09-10 13:03:02 -04:00
parent 53c617d779
commit d66450e427
381 changed files with 28864 additions and 34170 deletions
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70
kern/fs/sfs/sfs_balloc.c
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@@ -41,63 +41,53 @@
/*
* Zero out a disk block.
*/
static
int
sfs_clearblock(struct sfs_fs *sfs, daddr_t block)
{
/* static -> automatically initialized to zero */
static char zeros[SFS_BLOCKSIZE];
static int sfs_clearblock(struct sfs_fs *sfs, daddr_t block) {
/* static -> automatically initialized to zero */
static char zeros[SFS_BLOCKSIZE];
return sfs_writeblock(sfs, block, zeros, SFS_BLOCKSIZE);
return sfs_writeblock(sfs, block, zeros, SFS_BLOCKSIZE);
}
/*
* Allocate a block.
*/
int
sfs_balloc(struct sfs_fs *sfs, daddr_t *diskblock)
{
int result;
int sfs_balloc(struct sfs_fs *sfs, daddr_t *diskblock) {
int result;
result = bitmap_alloc(sfs->sfs_freemap, diskblock);
if (result) {
return result;
}
sfs->sfs_freemapdirty = true;
result = bitmap_alloc(sfs->sfs_freemap, diskblock);
if (result) {
return result;
}
sfs->sfs_freemapdirty = true;
if (*diskblock >= sfs->sfs_sb.sb_nblocks) {
panic("sfs: %s: balloc: invalid block %u\n",
sfs->sfs_sb.sb_volname, *diskblock);
}
if (*diskblock >= sfs->sfs_sb.sb_nblocks) {
panic("sfs: %s: balloc: invalid block %u\n", sfs->sfs_sb.sb_volname,
*diskblock);
}
/* Clear block before returning it */
result = sfs_clearblock(sfs, *diskblock);
if (result) {
bitmap_unmark(sfs->sfs_freemap, *diskblock);
}
return result;
/* Clear block before returning it */
result = sfs_clearblock(sfs, *diskblock);
if (result) {
bitmap_unmark(sfs->sfs_freemap, *diskblock);
}
return result;
}
/*
* Free a block.
*/
void
sfs_bfree(struct sfs_fs *sfs, daddr_t diskblock)
{
bitmap_unmark(sfs->sfs_freemap, diskblock);
sfs->sfs_freemapdirty = true;
void sfs_bfree(struct sfs_fs *sfs, daddr_t diskblock) {
bitmap_unmark(sfs->sfs_freemap, diskblock);
sfs->sfs_freemapdirty = true;
}
/*
* Check if a block is in use.
*/
int
sfs_bused(struct sfs_fs *sfs, daddr_t diskblock)
{
if (diskblock >= sfs->sfs_sb.sb_nblocks) {
panic("sfs: %s: sfs_bused called on out of range block %u\n",
sfs->sfs_sb.sb_volname, diskblock);
}
return bitmap_isset(sfs->sfs_freemap, diskblock);
int sfs_bused(struct sfs_fs *sfs, daddr_t diskblock) {
if (diskblock >= sfs->sfs_sb.sb_nblocks) {
panic("sfs: %s: sfs_bused called on out of range block %u\n",
sfs->sfs_sb.sb_volname, diskblock);
}
return bitmap_isset(sfs->sfs_freemap, diskblock);
}