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NFS: use secinfo when crossing mountpoints

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A submount may use different security than the parent
mount does.  We should figure out what sec flavor the
submount uses at mount time.

Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Bryan Schumaker
2011-03-24 17:12:30 +00:00
committed by Trond Myklebust
parent 5a5ea0d485
commit 7ebb931598
7 changed files with 165 additions and 11 deletions
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11
fs/nfs/nfs4xdr.c
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@@ -113,7 +113,7 @@ static int nfs4_stat_to_errno(int);
#define encode_restorefh_maxsz (op_encode_hdr_maxsz)
#define decode_restorefh_maxsz (op_decode_hdr_maxsz)
#define encode_fsinfo_maxsz (encode_getattr_maxsz)
#define decode_fsinfo_maxsz (op_decode_hdr_maxsz + 11)
#define decode_fsinfo_maxsz (op_decode_hdr_maxsz + 15)
#define encode_renew_maxsz (op_encode_hdr_maxsz + 3)
#define decode_renew_maxsz (op_decode_hdr_maxsz)
#define encode_setclientid_maxsz \
@@ -2966,6 +2966,7 @@ static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap)
if (unlikely(!p))
goto out_overflow;
bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
return -be32_to_cpup(p);
}
return 0;
out_overflow:
@@ -3953,6 +3954,10 @@ static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
fattr->valid |= status;
status = decode_attr_error(xdr, bitmap);
if (status == -NFS4ERR_WRONGSEC) {
nfs_fixup_secinfo_attributes(fattr, fh);
status = 0;
}
if (status < 0)
goto xdr_error;
@@ -6314,10 +6319,6 @@ static struct {
{ NFS4ERR_SYMLINK, -ELOOP },
{ NFS4ERR_OP_ILLEGAL, -EOPNOTSUPP },
{ NFS4ERR_DEADLOCK, -EDEADLK },
{ NFS4ERR_WRONGSEC, -EPERM }, /* FIXME: this needs
* to be handled by a
* middle-layer.
*/
{ -1, -EIO }
};