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Fix a bug with df on large (>1TB) nfsv3 file servers on 32 bit client

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machines where the 'long' number of blocks in struct statfs wont fit.
Instead of chosing an artificial 512 byte block size, simply scale it up
until we avoid an overflow.  NFSv3 reports the sizes in bytes, and the
blocksize is a figment of nfsclient's imagination.
This commit is contained in:
Peter Wemm 2003-04-24 20:36:32 +00:00
parent 0030cba4aa
commit d76f16de39
1 changed files with 23 additions and 11 deletions
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34
sys/nfsclient/nfs_vfsops.c
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@ -74,6 +74,8 @@ __FBSDID("$FreeBSD$");
#include <nfsclient/nfsm_subs.h>
#include <nfsclient/nfsdiskless.h>
#include <machine/limits.h>
MALLOC_DEFINE(M_NFSREQ, "NFS req", "NFS request header");
MALLOC_DEFINE(M_NFSBIGFH, "NFSV3 bigfh", "NFS version 3 file handle");
MALLOC_DEFINE(M_NFSDIROFF, "NFSV3 diroff", "NFS directory offset data");
@ -245,6 +247,7 @@ nfs_statfs(struct mount *mp, struct statfs *sbp, struct thread *td)
struct mbuf *mreq, *mrep, *md, *mb;
struct nfsnode *np;
u_quad_t tquad;
int bsize;
#ifndef nolint
sfp = NULL;
@ -272,17 +275,26 @@ nfs_statfs(struct mount *mp, struct statfs *sbp, struct thread *td)
sbp->f_flags = nmp->nm_flag;
sbp->f_iosize = nfs_iosize(nmp);
if (v3) {
sbp->f_bsize = NFS_FABLKSIZE;
tquad = fxdr_hyper(&sfp->sf_tbytes);
sbp->f_blocks = (long)(tquad / ((u_quad_t)NFS_FABLKSIZE));
tquad = fxdr_hyper(&sfp->sf_fbytes);
sbp->f_bfree = (long)(tquad / ((u_quad_t)NFS_FABLKSIZE));
tquad = fxdr_hyper(&sfp->sf_abytes);
sbp->f_bavail = (long)(tquad / ((u_quad_t)NFS_FABLKSIZE));
sbp->f_files = (fxdr_unsigned(int32_t,
sfp->sf_tfiles.nfsuquad[1]) & 0x7fffffff);
sbp->f_ffree = (fxdr_unsigned(int32_t,
sfp->sf_ffiles.nfsuquad[1]) & 0x7fffffff);
for (bsize = NFS_FABLKSIZE; ; bsize *= 2) {
sbp->f_bsize = bsize;
tquad = fxdr_hyper(&sfp->sf_tbytes);
if ((tquad / bsize) > LONG_MAX)
continue;
sbp->f_blocks = tquad / bsize;
tquad = fxdr_hyper(&sfp->sf_fbytes);
if ((tquad / bsize) > LONG_MAX)
continue;
sbp->f_bfree = tquad / bsize;
tquad = fxdr_hyper(&sfp->sf_abytes);
if ((tquad / bsize) > LONG_MAX)
continue;
sbp->f_bavail = tquad / bsize;
sbp->f_files = (fxdr_unsigned(int32_t,
sfp->sf_tfiles.nfsuquad[1]) & 0x7fffffff);
sbp->f_ffree = (fxdr_unsigned(int32_t,
sfp->sf_ffiles.nfsuquad[1]) & 0x7fffffff);
break;
}
} else {
sbp->f_bsize = fxdr_unsigned(int32_t, sfp->sf_bsize);
sbp->f_blocks = fxdr_unsigned(int32_t, sfp->sf_blocks);