-/* Copyright (c) 1981 Regents of the University of California */
-
-static char vers[] = "@(#)lfs_alloc.c 1.12 %G%";
-
-/* alloc.c 4.8 81/03/08 */
-
-#include "../h/param.h"
-#include "../h/systm.h"
-#include "../h/mount.h"
-#include "../h/fs.h"
-#include "../h/conf.h"
-#include "../h/buf.h"
-#include "../h/inode.h"
-#include "../h/dir.h"
-#include "../h/user.h"
-
-extern u_long hashalloc();
-extern ino_t ialloccg();
-extern daddr_t alloccg();
-extern daddr_t alloccgblk();
-extern daddr_t fragextend();
-extern daddr_t blkpref();
-extern daddr_t mapsearch();
-extern int inside[], around[];
-extern unsigned char *fragtbl[];
-
-struct buf *
-alloc(dev, ip, bpref, size)
- dev_t dev;
- register struct inode *ip;
- daddr_t bpref;
- int size;
-{
- daddr_t bno;
- register struct fs *fs;
- register struct buf *bp;
- int cg;
-
- fs = getfs(dev);
- if ((unsigned)size > fs->fs_bsize || size % fs->fs_fsize != 0)
- panic("alloc: bad size");
- if (size == fs->fs_bsize && fs->fs_cstotal.cs_nbfree == 0)
- goto nospace;
- if (u.u_uid != 0 &&
- fs->fs_cstotal.cs_nbfree * fs->fs_frag + fs->fs_cstotal.cs_nffree <
- fs->fs_dsize * fs->fs_minfree / 100)
- goto nospace;
- if (bpref >= fs->fs_size)
- bpref = 0;
- if (bpref == 0)
- cg = itog(ip->i_number, fs);
- else
- cg = dtog(bpref, fs);
- bno = (daddr_t)hashalloc(dev, fs, cg, (long)bpref, size, alloccg);
- if (bno == 0)
- goto nospace;
- bp = getblk(dev, fsbtodb(fs, bno), size);
- clrbuf(bp);
- return (bp);
-nospace:
- fserr(fs, "file system full");
- uprintf("\n%s: write failed, file system is full\n", fs->fs_fsmnt);
- u.u_error = ENOSPC;
- return (NULL);
-}
-
-struct buf *
-realloccg(dev, bprev, bpref, osize, nsize)
- dev_t dev;
- daddr_t bprev, bpref;
- int osize, nsize;
-{
- daddr_t bno;
- register struct fs *fs;
- register struct buf *bp, *obp;
- caddr_t cp;
- int cg;
-
- fs = getfs(dev);
- if ((unsigned)osize > fs->fs_bsize || osize % fs->fs_fsize != 0 ||
- (unsigned)nsize > fs->fs_bsize || nsize % fs->fs_fsize != 0)
- panic("realloccg: bad size");
- if (u.u_uid != 0 &&
- fs->fs_cstotal.cs_nbfree * fs->fs_frag + fs->fs_cstotal.cs_nffree <
- fs->fs_dsize * fs->fs_minfree / 100)
- goto nospace;
- if (bprev == 0)
- panic("realloccg: bad bprev");
- else
- cg = dtog(bprev, fs);
- bno = fragextend(dev, fs, cg, (long)bprev, osize, nsize);
- if (bno != 0) {
- bp = bread(dev, fsbtodb(fs, bno), osize);
- bp->b_bcount = nsize;
- blkclr(bp->b_un.b_addr + osize, nsize - osize);
- return (bp);
- }
- if (bpref >= fs->fs_size)
- bpref = 0;
- bno = (daddr_t)hashalloc(dev, fs, cg, (long)bpref, nsize, alloccg);
- if (bno != 0) {
- /*
- * make a new copy
- */
- obp = bread(dev, fsbtodb(fs, bprev), osize);
- bp = getblk(dev, fsbtodb(fs, bno), nsize);
- cp = bp->b_un.b_addr;
- bp->b_un.b_addr = obp->b_un.b_addr;
- obp->b_un.b_addr = cp;
- obp->b_flags |= B_INVAL;
- brelse(obp);
- fre(dev, bprev, (off_t)osize);
- blkclr(bp->b_un.b_addr + osize, nsize - osize);
- return(bp);
- }
-nospace:
- /*
- * no space available
- */
- fserr(fs, "file system full");
- uprintf("\n%s: write failed, file system is full\n", fs->fs_fsmnt);
- u.u_error = ENOSPC;
- return (NULL);
-}
-
-struct inode *
-ialloc(dev, ipref, mode)
- dev_t dev;
- ino_t ipref;
- int mode;
-{
- ino_t ino;
- register struct fs *fs;
- register struct inode *ip;
- int cg;
-
- fs = getfs(dev);
- if (fs->fs_cstotal.cs_nifree == 0)
- goto noinodes;
- if (ipref >= fs->fs_ncg * fs->fs_ipg)
- ipref = 0;
- cg = itog(ipref, fs);
- ino = (ino_t)hashalloc(dev, fs, cg, (long)ipref, mode, ialloccg);
- if (ino == 0)
- goto noinodes;
- ip = iget(dev, ino);
- if (ip == NULL) {
- ifree(dev, ino, 0);
- return (NULL);
- }
- if (ip->i_mode)
- panic("ialloc: dup alloc");
- return (ip);
-noinodes:
- fserr(fs, "out of inodes");
- uprintf("\n%s: create failed, no inodes free\n", fs->fs_fsmnt);
- u.u_error = ENOSPC;
- return (NULL);
-}
-