From a3f73c27afff9590a4432879b7145289cb89cf0a Mon Sep 17 00:00:00 2001 From: Weston Andros Adamson Date: Fri, 18 Oct 2013 15:15:16 -0400 Subject: [PATCH] NFS: separate passed security flavs from selected When filling parsed_mount_data, store the parsed sec= mount option in the new struct nfs_auth_info and the chosen flavor in selected_flavor. This patch lays the groundwork for supporting multiple sec= options. Signed-off-by: Weston Andros Adamson Signed-off-by: Trond Myklebust --- fs/nfs/client.c | 3 ++- fs/nfs/internal.h | 4 ++-- fs/nfs/nfs4client.c | 16 ++++++++------ fs/nfs/super.c | 47 +++++++++++++++++++---------------------- include/linux/nfs_xdr.h | 6 ++++++ 5 files changed, 41 insertions(+), 35 deletions(-) diff --git a/fs/nfs/client.c b/fs/nfs/client.c index 692fd0e9362f..f5a7f7f9cd59 100644 --- a/fs/nfs/client.c +++ b/fs/nfs/client.c @@ -787,7 +787,8 @@ static int nfs_init_server(struct nfs_server *server, server->port = data->nfs_server.port; - error = nfs_init_server_rpcclient(server, &timeparms, data->auth_flavors[0]); + error = nfs_init_server_rpcclient(server, &timeparms, + data->selected_flavor); if (error < 0) goto error; diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h index e5a6bd12562a..c8cd044f0982 100644 --- a/fs/nfs/internal.h +++ b/fs/nfs/internal.h @@ -88,8 +88,8 @@ struct nfs_parsed_mount_data { unsigned int namlen; unsigned int options; unsigned int bsize; - unsigned int auth_flavor_len; - rpc_authflavor_t auth_flavors[1]; + struct nfs_auth_info auth_info; + rpc_authflavor_t selected_flavor; char *client_address; unsigned int version; unsigned int minorversion; diff --git a/fs/nfs/nfs4client.c b/fs/nfs/nfs4client.c index 0cde95e9bd6a..d65090e5d00f 100644 --- a/fs/nfs/nfs4client.c +++ b/fs/nfs/nfs4client.c @@ -949,9 +949,8 @@ out: * Create a version 4 volume record */ static int nfs4_init_server(struct nfs_server *server, - const struct nfs_parsed_mount_data *data) + struct nfs_parsed_mount_data *data) { - rpc_authflavor_t pseudoflavor = RPC_AUTH_UNIX; struct rpc_timeout timeparms; int error; @@ -964,8 +963,10 @@ static int nfs4_init_server(struct nfs_server *server, server->flags = data->flags; server->options = data->options; - if (data->auth_flavor_len >= 1) - pseudoflavor = data->auth_flavors[0]; + if (data->auth_info.flavor_len >= 1) + data->selected_flavor = data->auth_info.flavors[0]; + else + data->selected_flavor = RPC_AUTH_UNIX; /* Get a client record */ error = nfs4_set_client(server, @@ -973,7 +974,7 @@ static int nfs4_init_server(struct nfs_server *server, (const struct sockaddr *)&data->nfs_server.address, data->nfs_server.addrlen, data->client_address, - pseudoflavor, + data->selected_flavor, data->nfs_server.protocol, &timeparms, data->minorversion, @@ -993,7 +994,8 @@ static int nfs4_init_server(struct nfs_server *server, server->port = data->nfs_server.port; - error = nfs_init_server_rpcclient(server, &timeparms, pseudoflavor); + error = nfs_init_server_rpcclient(server, &timeparms, + data->selected_flavor); error: /* Done */ @@ -1020,7 +1022,7 @@ struct nfs_server *nfs4_create_server(struct nfs_mount_info *mount_info, if (!server) return ERR_PTR(-ENOMEM); - auth_probe = mount_info->parsed->auth_flavor_len < 1; + auth_probe = mount_info->parsed->auth_info.flavor_len < 1; /* set up the general RPC client */ error = nfs4_init_server(server, mount_info->parsed); diff --git a/fs/nfs/super.c b/fs/nfs/super.c index e26647be69ce..b87744fb9dcd 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -923,8 +923,7 @@ static struct nfs_parsed_mount_data *nfs_alloc_parsed_mount_data(void) data->mount_server.port = NFS_UNSPEC_PORT; data->nfs_server.port = NFS_UNSPEC_PORT; data->nfs_server.protocol = XPRT_TRANSPORT_TCP; - data->auth_flavors[0] = RPC_AUTH_MAXFLAVOR; - data->auth_flavor_len = 0; + data->selected_flavor = RPC_AUTH_MAXFLAVOR; data->minorversion = 0; data->need_mount = true; data->net = current->nsproxy->net_ns; @@ -1019,13 +1018,6 @@ static void nfs_set_mount_transport_protocol(struct nfs_parsed_mount_data *mnt) } } -static void nfs_set_auth_parsed_mount_data(struct nfs_parsed_mount_data *data, - rpc_authflavor_t pseudoflavor) -{ - data->auth_flavors[0] = pseudoflavor; - data->auth_flavor_len = 1; -} - /* * Parse the value of the 'sec=' option. */ @@ -1076,7 +1068,8 @@ static int nfs_parse_security_flavors(char *value, } mnt->flags |= NFS_MOUNT_SECFLAVOUR; - nfs_set_auth_parsed_mount_data(mnt, pseudoflavor); + mnt->auth_info.flavors[0] = pseudoflavor; + mnt->auth_info.flavor_len = 1; return 1; } @@ -1623,7 +1616,7 @@ out_security_failure: } /* - * Ensure that the specified authtype in args->auth_flavors[0] is supported by + * Ensure that the specified authtype in args->auth_info is supported by * the server. Returns 0 if it's ok, and -EACCES if not. */ static int nfs_verify_authflavor(struct nfs_parsed_mount_data *args, @@ -1640,17 +1633,18 @@ static int nfs_verify_authflavor(struct nfs_parsed_mount_data *args, * can be used. */ for (i = 0; i < count; i++) { - if (args->auth_flavors[0] == server_authlist[i] || + if (args->auth_info.flavors[0] == server_authlist[i] || server_authlist[i] == RPC_AUTH_NULL) goto out; } dfprintk(MOUNT, "NFS: auth flavor %u not supported by server\n", - args->auth_flavors[0]); + args->auth_info.flavors[0]); return -EACCES; out: - dfprintk(MOUNT, "NFS: using auth flavor %u\n", args->auth_flavors[0]); + args->selected_flavor = args->auth_info.flavors[0]; + dfprintk(MOUNT, "NFS: using auth flavor %u\n", args->selected_flavor); return 0; } @@ -1738,9 +1732,10 @@ static struct nfs_server *nfs_try_mount_request(struct nfs_mount_info *mount_inf * Was a sec= authflavor specified in the options? First, verify * whether the server supports it, and then just try to use it if so. */ - if (args->auth_flavor_len > 0) { + if (args->auth_info.flavor_len > 0) { status = nfs_verify_authflavor(args, authlist, authlist_len); - dfprintk(MOUNT, "NFS: using auth flavor %u\n", args->auth_flavors[0]); + dfprintk(MOUNT, "NFS: using auth flavor %u\n", + args->selected_flavor); if (status) return ERR_PTR(status); return nfs_mod->rpc_ops->create_server(mount_info, nfs_mod); @@ -1769,7 +1764,7 @@ static struct nfs_server *nfs_try_mount_request(struct nfs_mount_info *mount_inf /* Fallthrough */ } dfprintk(MOUNT, "NFS: attempting to use auth flavor %u\n", flavor); - nfs_set_auth_parsed_mount_data(args, flavor); + args->selected_flavor = flavor; server = nfs_mod->rpc_ops->create_server(mount_info, nfs_mod); if (!IS_ERR(server)) return server; @@ -1785,7 +1780,7 @@ static struct nfs_server *nfs_try_mount_request(struct nfs_mount_info *mount_inf /* Last chance! Try AUTH_UNIX */ dfprintk(MOUNT, "NFS: attempting to use auth flavor %u\n", RPC_AUTH_UNIX); - nfs_set_auth_parsed_mount_data(args, RPC_AUTH_UNIX); + args->selected_flavor = RPC_AUTH_UNIX; return nfs_mod->rpc_ops->create_server(mount_info, nfs_mod); } @@ -1972,9 +1967,9 @@ static int nfs23_validate_mount_data(void *options, args->bsize = data->bsize; if (data->flags & NFS_MOUNT_SECFLAVOUR) - nfs_set_auth_parsed_mount_data(args, data->pseudoflavor); + args->selected_flavor = data->pseudoflavor; else - nfs_set_auth_parsed_mount_data(args, RPC_AUTH_UNIX); + args->selected_flavor = RPC_AUTH_UNIX; if (!args->nfs_server.hostname) goto out_nomem; @@ -2108,7 +2103,7 @@ static int nfs_validate_text_mount_data(void *options, nfs_set_port(sap, &args->nfs_server.port, port); - if (args->auth_flavor_len > 1) + if (args->auth_info.flavor_len > 1) goto out_bad_auth; return nfs_parse_devname(dev_name, @@ -2146,7 +2141,7 @@ nfs_compare_remount_data(struct nfs_server *nfss, data->version != nfss->nfs_client->rpc_ops->version || data->minorversion != nfss->nfs_client->cl_minorversion || data->retrans != nfss->client->cl_timeout->to_retries || - data->auth_flavors[0] != nfss->client->cl_auth->au_flavor || + data->selected_flavor != nfss->client->cl_auth->au_flavor || data->acregmin != nfss->acregmin / HZ || data->acregmax != nfss->acregmax / HZ || data->acdirmin != nfss->acdirmin / HZ || @@ -2191,7 +2186,9 @@ nfs_remount(struct super_block *sb, int *flags, char *raw_data) data->rsize = nfss->rsize; data->wsize = nfss->wsize; data->retrans = nfss->client->cl_timeout->to_retries; - nfs_set_auth_parsed_mount_data(data, nfss->client->cl_auth->au_flavor); + data->selected_flavor = nfss->client->cl_auth->au_flavor; + data->auth_info.flavors[0] = nfss->client->cl_auth->au_flavor; + data->auth_info.flavor_len = 1; data->acregmin = nfss->acregmin / HZ; data->acregmax = nfss->acregmax / HZ; data->acdirmin = nfss->acdirmin / HZ; @@ -2718,9 +2715,9 @@ static int nfs4_validate_mount_data(void *options, data->auth_flavours, sizeof(pseudoflavor))) return -EFAULT; - nfs_set_auth_parsed_mount_data(args, pseudoflavor); + args->selected_flavor = pseudoflavor; } else - nfs_set_auth_parsed_mount_data(args, RPC_AUTH_UNIX); + args->selected_flavor = RPC_AUTH_UNIX; c = strndup_user(data->hostname.data, NFS4_MAXNAMLEN); if (IS_ERR(c)) diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h index 8fe5b940c5f2..658104acf13b 100644 --- a/include/linux/nfs_xdr.h +++ b/include/linux/nfs_xdr.h @@ -591,6 +591,12 @@ struct nfs_renameres { struct nfs_fattr *new_fattr; }; +/* parsed sec= options */ +struct nfs_auth_info { + unsigned int flavor_len; + rpc_authflavor_t flavors[1]; +}; + /* * Argument struct for decode_entry function */