diff options
| -rw-r--r-- | fs/nfs/internal.h | 6 | ||||
| -rw-r--r-- | fs/nfs/mount_clnt.c | 37 |
2 files changed, 43 insertions, 0 deletions
diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h index e4d6a8348adf..0207758de44a 100644 --- a/fs/nfs/internal.h +++ b/fs/nfs/internal.h @@ -30,6 +30,12 @@ struct nfs_clone_mount { }; /* + * Note: RFC 1813 doesn't limit the number of auth flavors that + * a server can return, so make something up. + */ +#define NFS_MAX_SECFLAVORS (12) + +/* * In-kernel mount arguments */ struct nfs_parsed_mount_data { diff --git a/fs/nfs/mount_clnt.c b/fs/nfs/mount_clnt.c index dd8c6f448eaa..ed0a27ed538d 100644 --- a/fs/nfs/mount_clnt.c +++ b/fs/nfs/mount_clnt.c @@ -33,6 +33,7 @@ #define MNT_fhs_status_sz (1) #define MNT_fhandle_sz XDR_QUADLEN(NFS2_FHSIZE) #define MNT_fhandle3_sz (1 + XDR_QUADLEN(NFS3_FHSIZE)) +#define MNT_authflav3_sz (1 + NFS_MAX_SECFLAVORS) /* * XDR argument and result sizes @@ -122,6 +123,8 @@ static struct { struct mountres { int errno; struct nfs_fh *fh; + unsigned int *auth_count; + rpc_authflavor_t *auth_flavors; }; struct mnt_fhstatus { @@ -334,6 +337,40 @@ static int decode_fhandle3(struct xdr_stream *xdr, struct mountres *res) return 0; } +static int decode_auth_flavors(struct xdr_stream *xdr, struct mountres *res) +{ + rpc_authflavor_t *flavors = res->auth_flavors; + unsigned int *count = res->auth_count; + u32 entries, i; + __be32 *p; + + if (*count == 0) + return 0; + + p = xdr_inline_decode(xdr, sizeof(entries)); + if (unlikely(p == NULL)) + return -EIO; + entries = ntohl(*p); + dprintk("NFS: received %u auth flavors\n", entries); + if (entries > NFS_MAX_SECFLAVORS) + entries = NFS_MAX_SECFLAVORS; + + p = xdr_inline_decode(xdr, sizeof(u32) * entries); + if (unlikely(p == NULL)) + return -EIO; + + if (entries > *count) + entries = *count; + + for (i = 0; i < entries; i++) { + flavors[i] = ntohl(*p++); + dprintk("NFS:\tflavor %u: %d\n", i, flavors[i]); + } + *count = i; + + return 0; +} + static int xdr_decode_fhstatus3(struct rpc_rqst *req, __be32 *p, struct mnt_fhstatus *res) { |