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| author | Trond Myklebust <Trond.Myklebust@netapp.com> | 2013-08-07 18:30:52 +0200 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2013-08-07 18:37:04 +0200 |
| commit | 6da1a034362f86e157e251e65394f0b6570e3e3a (patch) | |
| tree | f8fa747e0efdd4dca2c94c219c62e8265a51d76a /fs/nfs/super.c | |
| parent | nfs: verify open flags before allowing an atomic open (diff) | |
| download | linux-6da1a034362f86e157e251e65394f0b6570e3e3a.tar.xz linux-6da1a034362f86e157e251e65394f0b6570e3e3a.zip | |
NFSv4: Refuse mount attempts with proto=udp
RFC3530 disallows the use of udp as a transport protocol for NFSv4.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs/super.c')
| -rw-r--r-- | fs/nfs/super.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/fs/nfs/super.c b/fs/nfs/super.c index 71fdc0dfa0d2..f2071d221c77 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -2084,6 +2084,8 @@ static int nfs_validate_text_mount_data(void *options, max_namelen = NFS4_MAXNAMLEN; max_pathlen = NFS4_MAXPATHLEN; nfs_validate_transport_protocol(args); + if (args->nfs_server.protocol == XPRT_TRANSPORT_UDP) + goto out_invalid_transport_udp; nfs4_validate_mount_flags(args); #else goto out_v4_not_compiled; @@ -2106,6 +2108,10 @@ static int nfs_validate_text_mount_data(void *options, out_v4_not_compiled: dfprintk(MOUNT, "NFS: NFSv4 is not compiled into kernel\n"); return -EPROTONOSUPPORT; +#else +out_invalid_transport_udp: + dfprintk(MOUNT, "NFSv4: Unsupported transport protocol udp\n"); + return -EINVAL; #endif /* !CONFIG_NFS_V4 */ out_no_address: @@ -2711,6 +2717,8 @@ static int nfs4_validate_mount_data(void *options, args->acdirmax = data->acdirmax; args->nfs_server.protocol = data->proto; nfs_validate_transport_protocol(args); + if (args->nfs_server.protocol == XPRT_TRANSPORT_UDP) + goto out_invalid_transport_udp; break; default: @@ -2731,6 +2739,10 @@ out_inval_auth: out_no_address: dfprintk(MOUNT, "NFS4: mount program didn't pass remote address\n"); return -EINVAL; + +out_invalid_transport_udp: + dfprintk(MOUNT, "NFSv4: Unsupported transport protocol udp\n"); + return -EINVAL; } /* |