mirror of https://gitee.com/openkylin/linux.git
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 <bjschuma@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Bryan Schumaker
Trond Myklebust
parent
486aa699ff
commit
b72e4f42a3
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@ -103,6 +103,7 @@ struct nfs_parsed_mount_data {
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unsigned int version;
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unsigned int minorversion;
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char *fscache_uniq;
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bool need_mount;
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struct {
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struct sockaddr_storage address;
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151
fs/nfs/super.c
151
fs/nfs/super.c
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@ -66,6 +66,7 @@
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#include "pnfs.h"
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#define NFSDBG_FACILITY NFSDBG_VFS
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#define NFS_TEXT_DATA 1
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#ifdef CONFIG_NFS_V3
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#define NFS_DEFAULT_VERSION 3
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@ -333,8 +334,7 @@ static const struct super_operations nfs_sops = {
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};
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#ifdef CONFIG_NFS_V4
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static int nfs4_validate_text_mount_data(void *options,
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struct nfs_parsed_mount_data *args, const char *dev_name);
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static void nfs4_validate_mount_flags(struct nfs_parsed_mount_data *);
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static struct dentry *nfs4_try_mount(int flags, const char *dev_name,
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struct nfs_parsed_mount_data *data);
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static struct dentry *nfs4_mount(struct file_system_type *fs_type,
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@ -964,6 +964,7 @@ static struct nfs_parsed_mount_data *nfs_alloc_parsed_mount_data(void)
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data->auth_flavors[0] = RPC_AUTH_UNIX;
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data->auth_flavor_len = 1;
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data->minorversion = 0;
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data->need_mount = true;
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data->net = current->nsproxy->net_ns;
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security_init_mnt_opts(&data->lsm_opts);
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}
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@ -1754,9 +1755,11 @@ static struct dentry *nfs_try_mount(int flags, const char *dev_name,
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int status;
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struct nfs_server *server;
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status = nfs_request_mount(mount_info->parsed, mntfh);
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if (status)
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return ERR_PTR(status);
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if (mount_info->parsed->need_mount) {
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status = nfs_request_mount(mount_info->parsed, mntfh);
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if (status)
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return ERR_PTR(status);
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}
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/* Get a volume representation */
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server = nfs_create_server(mount_info->parsed, mntfh);
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@ -1911,6 +1914,7 @@ static int nfs_validate_mount_data(void *options,
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args->acregmax = data->acregmax;
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args->acdirmin = data->acdirmin;
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args->acdirmax = data->acdirmax;
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args->need_mount = false;
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memcpy(sap, &data->addr, sizeof(data->addr));
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args->nfs_server.addrlen = sizeof(data->addr);
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@ -1962,38 +1966,8 @@ static int nfs_validate_mount_data(void *options,
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}
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break;
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default: {
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int status;
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if (nfs_parse_mount_options((char *)options, args) == 0)
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return -EINVAL;
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if (!nfs_verify_server_address(sap))
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goto out_no_address;
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if (args->version == 4)
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#ifdef CONFIG_NFS_V4
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return nfs4_validate_text_mount_data(options,
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args, dev_name);
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#else
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goto out_v4_not_compiled;
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#endif
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nfs_set_port(sap, &args->nfs_server.port, 0);
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nfs_set_mount_transport_protocol(args);
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status = nfs_parse_devname(dev_name,
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&args->nfs_server.hostname,
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PAGE_SIZE,
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&args->nfs_server.export_path,
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NFS_MAXPATHLEN);
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if (status)
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return status;
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break;
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}
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default:
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return NFS_TEXT_DATA;
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}
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#ifndef CONFIG_NFS_V3
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@ -2022,12 +1996,6 @@ static int nfs_validate_mount_data(void *options,
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return -EPROTONOSUPPORT;
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#endif /* !CONFIG_NFS_V3 */
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#ifndef CONFIG_NFS_V4
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out_v4_not_compiled:
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dfprintk(MOUNT, "NFS: NFSv4 is not compiled into kernel\n");
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return -EPROTONOSUPPORT;
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#endif /* !CONFIG_NFS_V4 */
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out_nomem:
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dfprintk(MOUNT, "NFS: not enough memory to handle mount options\n");
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return -ENOMEM;
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@ -2041,6 +2009,60 @@ static int nfs_validate_mount_data(void *options,
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return -EINVAL;
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}
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static int nfs_validate_text_mount_data(void *options,
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struct nfs_parsed_mount_data *args,
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const char *dev_name)
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{
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int port = 0;
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int max_namelen = PAGE_SIZE;
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int max_pathlen = NFS_MAXPATHLEN;
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struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address;
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if (nfs_parse_mount_options((char *)options, args) == 0)
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return -EINVAL;
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if (!nfs_verify_server_address(sap))
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goto out_no_address;
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if (args->version == 4) {
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#ifdef CONFIG_NFS_V4
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port = NFS_PORT;
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max_namelen = NFS4_MAXNAMLEN;
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max_pathlen = NFS4_MAXPATHLEN;
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nfs_validate_transport_protocol(args);
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nfs4_validate_mount_flags(args);
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#else
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goto out_v4_not_compiled;
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#endif /* CONFIG_NFS_V4 */
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} else
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nfs_set_mount_transport_protocol(args);
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nfs_set_port(sap, &args->nfs_server.port, port);
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if (args->auth_flavor_len > 1)
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goto out_bad_auth;
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return nfs_parse_devname(dev_name,
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&args->nfs_server.hostname,
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max_namelen,
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&args->nfs_server.export_path,
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max_pathlen);
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#ifndef CONFIG_NFS_V4
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out_v4_not_compiled:
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dfprintk(MOUNT, "NFS: NFSv4 is not compiled into kernel\n");
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return -EPROTONOSUPPORT;
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#endif /* !CONFIG_NFS_V4 */
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out_no_address:
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dfprintk(MOUNT, "NFS: mount program didn't pass remote address\n");
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return -EINVAL;
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out_bad_auth:
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dfprintk(MOUNT, "NFS: Too many RPC auth flavours specified\n");
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return -EINVAL;
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}
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static int
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nfs_compare_remount_data(struct nfs_server *nfss,
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struct nfs_parsed_mount_data *data)
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@ -2438,6 +2460,8 @@ static struct dentry *nfs_fs_mount(struct file_system_type *fs_type,
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/* Validate the mount data */
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error = nfs_validate_mount_data(raw_data, data, mntfh, dev_name);
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if (error == NFS_TEXT_DATA)
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error = nfs_validate_text_mount_data(raw_data, data, dev_name);
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if (error < 0) {
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mntroot = ERR_PTR(error);
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goto out;
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@ -2572,37 +2596,6 @@ static void nfs4_validate_mount_flags(struct nfs_parsed_mount_data *args)
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NFS_MOUNT_LOCAL_FLOCK|NFS_MOUNT_LOCAL_FCNTL);
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}
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static int nfs4_validate_text_mount_data(void *options,
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struct nfs_parsed_mount_data *args,
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const char *dev_name)
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{
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struct sockaddr *sap = (struct sockaddr *)&args->nfs_server.address;
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nfs_set_port(sap, &args->nfs_server.port, NFS_PORT);
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nfs_validate_transport_protocol(args);
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nfs4_validate_mount_flags(args);
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if (args->version != 4) {
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dfprintk(MOUNT,
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"NFS4: Illegal mount version\n");
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return -EINVAL;
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}
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if (args->auth_flavor_len > 1) {
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dfprintk(MOUNT,
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"NFS4: Too many RPC auth flavours specified\n");
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return -EINVAL;
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}
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return nfs_parse_devname(dev_name,
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&args->nfs_server.hostname,
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NFS4_MAXNAMLEN,
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&args->nfs_server.export_path,
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NFS4_MAXPATHLEN);
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}
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/*
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* Validate NFSv4 mount options
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*/
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@ -2673,13 +2666,7 @@ static int nfs4_validate_mount_data(void *options,
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break;
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default:
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if (nfs_parse_mount_options((char *)options, args) == 0)
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return -EINVAL;
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if (!nfs_verify_server_address(sap))
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return -EINVAL;
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return nfs4_validate_text_mount_data(options, args, dev_name);
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return NFS_TEXT_DATA;
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}
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return 0;
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@ -2880,6 +2867,8 @@ static struct dentry *nfs4_mount(struct file_system_type *fs_type,
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/* Validate the mount data */
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error = nfs4_validate_mount_data(raw_data, data, dev_name);
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if (error == NFS_TEXT_DATA)
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error = nfs_validate_text_mount_data(raw_data, data, dev_name);
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if (error < 0) {
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res = ERR_PTR(error);
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goto out;
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