diff options
Diffstat (limited to 'sys/ufs/ffs/ffs_alloc.c')
| -rw-r--r-- | sys/ufs/ffs/ffs_alloc.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/sys/ufs/ffs/ffs_alloc.c b/sys/ufs/ffs/ffs_alloc.c index dbfe87585eb..313ff679cbd 100644 --- a/sys/ufs/ffs/ffs_alloc.c +++ b/sys/ufs/ffs/ffs_alloc.c @@ -1,4 +1,4 @@ -/* $OpenBSD: ffs_alloc.c,v 1.68 2007/01/06 23:30:42 tedu Exp $ */ +/* $OpenBSD: ffs_alloc.c,v 1.69 2007/01/07 15:39:22 sturm Exp $ */ /* $NetBSD: ffs_alloc.c,v 1.11 1996/05/11 18:27:09 mycroft Exp $ */ /* @@ -134,23 +134,29 @@ ffs_alloc(struct inode *ip, daddr_t lbn, daddr_t bpref, int size, if ((error = ufs_quota_alloc_blocks(ip, btodb(size), cred)) != 0) return (error); + /* + * Start allocation in the preferred block's cylinder group or + * the file's inode's cylinder group if no preferred block was + * specified. + */ if (bpref >= fs->fs_size) bpref = 0; if (bpref == 0) cg = ino_to_cg(fs, ip->i_number); else cg = dtog(fs, bpref); + + /* Try allocating a block. */ bno = (daddr_t)ffs_hashalloc(ip, cg, (long)bpref, size, ffs_alloccg); if (bno > 0) { + /* allocation successful, update inode data */ DIP_ADD(ip, blocks, btodb(size)); ip->i_flag |= IN_CHANGE | IN_UPDATE; *bnp = bno; return (0); } - /* - * Restore user's disk quota because allocation failed. - */ + /* Restore user's disk quota because allocation failed. */ (void) ufs_quota_free_blocks(ip, btodb(size), cred); nospace: @@ -1280,6 +1286,7 @@ ffs_alloccg(struct inode *ip, int cg, daddr_t bpref, int size) fs = ip->i_fs; if (fs->fs_cs(fs, cg).cs_nbfree == 0 && size == fs->fs_bsize) return (0); + /* read cylinder group block */ error = bread(ip->i_devvp, fsbtodb(fs, cgtod(fs, cg)), (int)fs->fs_cgsize, NOCRED, &bp); if (error) { @@ -1296,6 +1303,7 @@ ffs_alloccg(struct inode *ip, int cg, daddr_t bpref, int size) cgp->cg_ffs2_time = cgp->cg_time = time_second; if (size == fs->fs_bsize) { + /* allocate and return a complete data block */ bno = ffs_alloccgblk(ip, bp, bpref); bdwrite(bp); return (bno); |