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Limit filesize to the amount that the VM system can currently handle

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(2GB).  If this limit is not imposed, then filesystem corruption will
ensue when files larger than 2GB are created.  This is temporary,
and the underlying limitation will be removed later.
This commit is contained in:
John Dyson 1995-05-01 23:20:24 +00:00
parent 7c431062a2
commit f33775afcf
1 changed files with 16 additions and 1 deletions
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17
sys/ufs/ffs/ffs_vfsops.c
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@ -31,7 +31,7 @@
* SUCH DAMAGE.
*
* @(#)ffs_vfsops.c 8.8 (Berkeley) 4/18/94
* $Id: ffs_vfsops.c,v 1.16 1995/04/09 06:03:37 davidg Exp $
* $Id: ffs_vfsops.c,v 1.17 1995/04/11 04:23:47 davidg Exp $
*/
#include <sys/param.h>
@ -67,6 +67,7 @@
int ffs_sbupdate __P((struct ufsmount *, int));
int ffs_reload __P((struct mount *,struct ucred *,struct proc *));
int ffs_oldfscompat __P((struct fs *));
void ffs_vmlimits __P((struct fs *));
struct vfsops ufs_vfsops = {
ffs_mount,
@ -296,6 +297,7 @@ ffs_reload(mountp, cred, p)
bp->b_flags |= B_INVAL;
brelse(bp);
ffs_oldfscompat(fs);
ffs_vmlimits(fs);
/*
* Step 3: re-read summary information from disk.
*/
@ -458,6 +460,7 @@ ffs_mountfs(devvp, mp, p)
ump->um_quotas[i] = NULLVP;
devvp->v_specflags |= SI_MOUNTEDON;
ffs_oldfscompat(fs);
ffs_vmlimits(fs);
if (ronly == 0)
ffs_sbupdate(ump, MNT_WAIT);
return (0);
@ -505,6 +508,18 @@ ffs_oldfscompat(fs)
return (0);
}
/*
* Sanity check for VM file size limits -- temporary until
* VM system can support > 32bit offsets
*/
void
ffs_vmlimits(fs)
struct fs *fs;
{
if( fs->fs_maxfilesize > (((u_quad_t) 1 << 31) - 1))
fs->fs_maxfilesize = ((u_quad_t) 1 << 31) - 1;
}
/*
* unmount system call
*/