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NFSv4: Refuse mount attempts with proto=udp

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RFC3530 disallows the use of udp as a transport protocol for NFSv4.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Trond Myklebust 2013-08-07 12:30:52 -04:00
parent 9597c13b2f
commit 6da1a03436
1 changed files with 12 additions and 0 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

12
fs/nfs/super.c
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@ -2084,6 +2084,8 @@ static int nfs_validate_text_mount_data(void *options,
max_namelen = NFS4_MAXNAMLEN; max_namelen = NFS4_MAXNAMLEN;
max_pathlen = NFS4_MAXPATHLEN; max_pathlen = NFS4_MAXPATHLEN;
nfs_validate_transport_protocol(args); nfs_validate_transport_protocol(args);
if (args->nfs_server.protocol == XPRT_TRANSPORT_UDP)
goto out_invalid_transport_udp;
nfs4_validate_mount_flags(args); nfs4_validate_mount_flags(args);
#else #else
goto out_v4_not_compiled; goto out_v4_not_compiled;
@ -2106,6 +2108,10 @@ static int nfs_validate_text_mount_data(void *options,
out_v4_not_compiled: out_v4_not_compiled:
dfprintk(MOUNT, "NFS: NFSv4 is not compiled into kernel\n"); dfprintk(MOUNT, "NFS: NFSv4 is not compiled into kernel\n");
return -EPROTONOSUPPORT; return -EPROTONOSUPPORT;
#else
out_invalid_transport_udp:
dfprintk(MOUNT, "NFSv4: Unsupported transport protocol udp\n");
return -EINVAL;
#endif /* !CONFIG_NFS_V4 */ #endif /* !CONFIG_NFS_V4 */
out_no_address: out_no_address:
@ -2711,6 +2717,8 @@ static int nfs4_validate_mount_data(void *options,
args->acdirmax = data->acdirmax; args->acdirmax = data->acdirmax;
args->nfs_server.protocol = data->proto; args->nfs_server.protocol = data->proto;
nfs_validate_transport_protocol(args); nfs_validate_transport_protocol(args);
if (args->nfs_server.protocol == XPRT_TRANSPORT_UDP)
goto out_invalid_transport_udp;
break; break;
default: default:
@ -2731,6 +2739,10 @@ static int nfs4_validate_mount_data(void *options,
out_no_address: out_no_address:
dfprintk(MOUNT, "NFS4: mount program didn't pass remote address\n"); dfprintk(MOUNT, "NFS4: mount program didn't pass remote address\n");
return -EINVAL; return -EINVAL;
out_invalid_transport_udp:
dfprintk(MOUNT, "NFSv4: Unsupported transport protocol udp\n");
return -EINVAL;
} }
/* /*