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During truncation, have to notify the VM about the new size

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of the NFS file *before* doing the nfs_vinvalbuf operation.
Otherwise some invalid data may show up in an mmap.
This commit is contained in:
Kirk McKusick 1998-09-29 23:28:32 +00:00
parent 11ee80a991
commit b6b74f2f4e
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=39792
2 changed files with 10 additions and 6 deletions
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8
sys/nfs/nfs_vnops.c
View File

@ -34,7 +34,7 @@
* SUCH DAMAGE.
*
* @(#)nfs_vnops.c 8.16 (Berkeley) 5/27/95
* $Id: nfs_vnops.c,v 1.105 1998/07/04 20:45:37 julian Exp $
* $Id: nfs_vnops.c,v 1.106 1998/08/13 08:09:08 dfr Exp $
*/
@ -622,6 +622,7 @@ nfs_setattr(ap)
*/
if (vp->v_mount->mnt_flag & MNT_RDONLY)
return (EROFS);
vnode_pager_setsize(vp, (u_long)vap->va_size);
if (np->n_flag & NMODIFIED) {
if (vap->va_size == 0)
error = nfs_vinvalbuf(vp, 0,
@ -629,12 +630,13 @@ nfs_setattr(ap)
else
error = nfs_vinvalbuf(vp, V_SAVE,
ap->a_cred, ap->a_p, 1);
if (error)
if (error) {
vnode_pager_setsize(vp, (u_long)np->n_size);
return (error);
}
}
tsize = np->n_size;
np->n_size = np->n_vattr.va_size = vap->va_size;
vnode_pager_setsize(vp, (u_long)np->n_size);
};
} else if ((vap->va_mtime.tv_sec != VNOVAL ||
vap->va_atime.tv_sec != VNOVAL) && (np->n_flag & NMODIFIED) &&

8
sys/nfsclient/nfs_vnops.c
View File

@ -34,7 +34,7 @@
* SUCH DAMAGE.
*
* @(#)nfs_vnops.c 8.16 (Berkeley) 5/27/95
* $Id: nfs_vnops.c,v 1.105 1998/07/04 20:45:37 julian Exp $
* $Id: nfs_vnops.c,v 1.106 1998/08/13 08:09:08 dfr Exp $
*/
@ -622,6 +622,7 @@ nfs_setattr(ap)
*/
if (vp->v_mount->mnt_flag & MNT_RDONLY)
return (EROFS);
vnode_pager_setsize(vp, (u_long)vap->va_size);
if (np->n_flag & NMODIFIED) {
if (vap->va_size == 0)
error = nfs_vinvalbuf(vp, 0,
@ -629,12 +630,13 @@ nfs_setattr(ap)
else
error = nfs_vinvalbuf(vp, V_SAVE,
ap->a_cred, ap->a_p, 1);
if (error)
if (error) {
vnode_pager_setsize(vp, (u_long)np->n_size);
return (error);
}
}
tsize = np->n_size;
np->n_size = np->n_vattr.va_size = vap->va_size;
vnode_pager_setsize(vp, (u_long)np->n_size);
};
} else if ((vap->va_mtime.tv_sec != VNOVAL ||
vap->va_atime.tv_sec != VNOVAL) && (np->n_flag & NMODIFIED) &&