From b72e4f42a33137acc037546277a08f407d3c1016 Mon Sep 17 00:00:00 2001 From: Bryan Schumaker Date: Thu, 10 May 2012 15:07:40 -0400 Subject: [PATCH] NFS: Create a single function for text mount data The v2/3 and v4 cases were very similar, with just a few parameters changed. This makes it easy to share code. Signed-off-by: Bryan Schumaker Signed-off-by: Trond Myklebust --- fs/nfs/internal.h | 1 + fs/nfs/super.c | 151 +++++++++++++++++++++++++----------------------------- 2 files changed, 71 insertions(+), 81 deletions(-) diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h index 1855e8f..4e9b0ff 100644 --- a/fs/nfs/internal.h +++ b/fs/nfs/internal.h @@ -103,6 +103,7 @@ struct nfs_parsed_mount_data { unsigned int version; unsigned int minorversion; char *fscache_uniq; + bool need_mount; struct { struct sockaddr_storage address; diff --git a/fs/nfs/super.c b/fs/nfs/super.c index c69c806..db636d7 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -66,6 +66,7 @@ #include "pnfs.h" #define NFSDBG_FACILITY NFSDBG_VFS +#define NFS_TEXT_DATA 1 #ifdef CONFIG_NFS_V3 #define NFS_DEFAULT_VERSION 3 @@ -333,8 +334,7 @@ static const struct super_operations nfs_sops = { }; #ifdef CONFIG_NFS_V4 -static int nfs4_validate_text_mount_data(void *options, - struct nfs_parsed_mount_data *args, const char *dev_name); +static void nfs4_validate_mount_flags(struct nfs_parsed_mount_data *); static struct dentry *nfs4_try_mount(int flags, const char *dev_name, struct nfs_parsed_mount_data *data); static struct dentry *nfs4_mount(struct file_system_type *fs_type, @@ -964,6 +964,7 @@ static struct nfs_parsed_mount_data *nfs_alloc_parsed_mount_data(void) data->auth_flavors[0] = RPC_AUTH_UNIX; data->auth_flavor_len = 1; data->minorversion = 0; + data->need_mount = true; data->net = current->nsproxy->net_ns; security_init_mnt_opts(&data->lsm_opts); } @@ -1754,9 +1755,11 @@ static struct dentry *nfs_try_mount(int flags, const char *dev_name, int status; struct nfs_server *server; - status = nfs_request_mount(mount_info->parsed, mntfh); - if (status) - return ERR_PTR(status); + if (mount_info->parsed->need_mount) { + status = nfs_request_mount(mount_info->parsed, mntfh); + if (status) + return ERR_PTR(status); + } /* Get a volume representation */ server = nfs_create_server(mount_info->parsed, mntfh); @@ -1911,6 +1914,7 @@ static int nfs_validate_mount_data(void *options, args->acregmax = data->acregmax; args->acdirmin = data->acdirmin; args->acdirmax = data->acdirmax; + args->need_mount = false; memcpy(sap, &data->addr, sizeof(data->addr)); args->nfs_server.addrlen = sizeof(data->addr); @@ -1962,38 +1966,8 @@ static int nfs_validate_mount_data(void *options, } break; - default: { - int status; - - if (nfs_parse_mount_options((char *)options, args) == 0) - return -EINVAL; - - if (!nfs_verify_server_address(sap)) - goto out_no_address; - - if (args->version == 4) -#ifdef CONFIG_NFS_V4 - return nfs4_validate_text_mount_data(options, - args, dev_name); -#else - goto out_v4_not_compiled; -#endif - - nfs_set_port(sap, &args->nfs_server.port, 0); - - nfs_set_mount_transport_protocol(args); - - status = nfs_parse_devname(dev_name, - &args->nfs_server.hostname, - PAGE_SIZE, - &args->nfs_server.export_path, - NFS_MAXPATHLEN); - - if (status) - return status; - - break; - } + default: + return NFS_TEXT_DATA; } #ifndef CONFIG_NFS_V3 @@ -2022,12 +1996,6 @@ out_v3_not_compiled: return -EPROTONOSUPPORT; #endif /* !CONFIG_NFS_V3 */ -#ifndef CONFIG_NFS_V4 -out_v4_not_compiled: - dfprintk(MOUNT, "NFS: NFSv4 is not compiled into kernel\n"); - return -EPROTONOSUPPORT; -#endif /* !CONFIG_NFS_V4 */ - out_nomem: dfprintk(MOUNT, "NFS: not enough memory to handle mount options\n"); return -ENOMEM; @@ -2041,6 +2009,60 @@ out_invalid_fh: return -EINVAL; } +static int nfs_validate_text_mount_data(void *options, + struct nfs_parsed_mount_data *args, + const char *dev_name) +{ + int port = 0; + int max_namelen = PAGE_SIZE; + int max_pathlen = NFS_MAXPATHLEN; + struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address; + + if (nfs_parse_mount_options((char *)options, args) == 0) + return -EINVAL; + + if (!nfs_verify_server_address(sap)) + goto out_no_address; + + if (args->version == 4) { +#ifdef CONFIG_NFS_V4 + port = NFS_PORT; + max_namelen = NFS4_MAXNAMLEN; + max_pathlen = NFS4_MAXPATHLEN; + nfs_validate_transport_protocol(args); + nfs4_validate_mount_flags(args); +#else + goto out_v4_not_compiled; +#endif /* CONFIG_NFS_V4 */ + } else + nfs_set_mount_transport_protocol(args); + + nfs_set_port(sap, &args->nfs_server.port, port); + + if (args->auth_flavor_len > 1) + goto out_bad_auth; + + return nfs_parse_devname(dev_name, + &args->nfs_server.hostname, + max_namelen, + &args->nfs_server.export_path, + max_pathlen); + +#ifndef CONFIG_NFS_V4 +out_v4_not_compiled: + dfprintk(MOUNT, "NFS: NFSv4 is not compiled into kernel\n"); + return -EPROTONOSUPPORT; +#endif /* !CONFIG_NFS_V4 */ + +out_no_address: + dfprintk(MOUNT, "NFS: mount program didn't pass remote address\n"); + return -EINVAL; + +out_bad_auth: + dfprintk(MOUNT, "NFS: Too many RPC auth flavours specified\n"); + return -EINVAL; +} + static int nfs_compare_remount_data(struct nfs_server *nfss, struct nfs_parsed_mount_data *data) @@ -2438,6 +2460,8 @@ static struct dentry *nfs_fs_mount(struct file_system_type *fs_type, /* Validate the mount data */ error = nfs_validate_mount_data(raw_data, data, mntfh, dev_name); + if (error == NFS_TEXT_DATA) + error = nfs_validate_text_mount_data(raw_data, data, dev_name); if (error < 0) { mntroot = ERR_PTR(error); goto out; @@ -2572,37 +2596,6 @@ static void nfs4_validate_mount_flags(struct nfs_parsed_mount_data *args) NFS_MOUNT_LOCAL_FLOCK|NFS_MOUNT_LOCAL_FCNTL); } -static int nfs4_validate_text_mount_data(void *options, - struct nfs_parsed_mount_data *args, - const char *dev_name) -{ - struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address; - - nfs_set_port(sap, &args->nfs_server.port, NFS_PORT); - - nfs_validate_transport_protocol(args); - - nfs4_validate_mount_flags(args); - - if (args->version != 4) { - dfprintk(MOUNT, - "NFS4: Illegal mount version\n"); - return -EINVAL; - } - - if (args->auth_flavor_len > 1) { - dfprintk(MOUNT, - "NFS4: Too many RPC auth flavours specified\n"); - return -EINVAL; - } - - return nfs_parse_devname(dev_name, - &args->nfs_server.hostname, - NFS4_MAXNAMLEN, - &args->nfs_server.export_path, - NFS4_MAXPATHLEN); -} - /* * Validate NFSv4 mount options */ @@ -2673,13 +2666,7 @@ static int nfs4_validate_mount_data(void *options, break; default: - if (nfs_parse_mount_options((char *)options, args) == 0) - return -EINVAL; - - if (!nfs_verify_server_address(sap)) - return -EINVAL; - - return nfs4_validate_text_mount_data(options, args, dev_name); + return NFS_TEXT_DATA; } return 0; @@ -2880,6 +2867,8 @@ static struct dentry *nfs4_mount(struct file_system_type *fs_type, /* Validate the mount data */ error = nfs4_validate_mount_data(raw_data, data, dev_name); + if (error == NFS_TEXT_DATA) + error = nfs_validate_text_mount_data(raw_data, data, dev_name); if (error < 0) { res = ERR_PTR(error); goto out; -- 2.7.4