diff options
| -rw-r--r-- | fs/nfs/client.c | 2 | ||||
| -rw-r--r-- | fs/nfs/super.c | 20 | ||||
| -rw-r--r-- | include/linux/nfs_fs_sb.h | 2 |
3 files changed, 24 insertions, 0 deletions
diff --git a/fs/nfs/client.c b/fs/nfs/client.c index 143149db3440..92aed2e08bd5 100644 --- a/fs/nfs/client.c +++ b/fs/nfs/client.c @@ -752,6 +752,8 @@ static int nfs_init_server(struct nfs_server *server, data->timeo, data->retrans); if (data->flags & NFS_MOUNT_NORESVPORT) set_bit(NFS_CS_NORESVPORT, &cl_init.init_flags); + if (server->options & NFS_OPTION_MIGRATION) + set_bit(NFS_CS_MIGRATION, &cl_init.init_flags); /* Allocate or find a client reference we can use */ clp = nfs_get_client(&cl_init, &timeparms, NULL, RPC_AUTH_UNIX); diff --git a/fs/nfs/super.c b/fs/nfs/super.c index b8eda700584b..056138d45c11 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -88,6 +88,7 @@ enum { Opt_sharecache, Opt_nosharecache, Opt_resvport, Opt_noresvport, Opt_fscache, Opt_nofscache, + Opt_migration, Opt_nomigration, /* Mount options that take integer arguments */ Opt_port, @@ -147,6 +148,8 @@ static const match_table_t nfs_mount_option_tokens = { { Opt_noresvport, "noresvport" }, { Opt_fscache, "fsc" }, { Opt_nofscache, "nofsc" }, + { Opt_migration, "migration" }, + { Opt_nomigration, "nomigration" }, { Opt_port, "port=%s" }, { Opt_rsize, "rsize=%s" }, @@ -676,6 +679,9 @@ static void nfs_show_mount_options(struct seq_file *m, struct nfs_server *nfss, if (nfss->options & NFS_OPTION_FSCACHE) seq_printf(m, ",fsc"); + if (nfss->options & NFS_OPTION_MIGRATION) + seq_printf(m, ",migration"); + if (nfss->flags & NFS_MOUNT_LOOKUP_CACHE_NONEG) { if (nfss->flags & NFS_MOUNT_LOOKUP_CACHE_NONE) seq_printf(m, ",lookupcache=none"); @@ -1243,6 +1249,12 @@ static int nfs_parse_mount_options(char *raw, kfree(mnt->fscache_uniq); mnt->fscache_uniq = NULL; break; + case Opt_migration: + mnt->options |= NFS_OPTION_MIGRATION; + break; + case Opt_nomigration: + mnt->options &= NFS_OPTION_MIGRATION; + break; /* * options that take numeric values @@ -1535,6 +1547,10 @@ static int nfs_parse_mount_options(char *raw, if (mnt->minorversion && mnt->version != 4) goto out_minorversion_mismatch; + if (mnt->options & NFS_OPTION_MIGRATION && + mnt->version != 4 && mnt->minorversion != 0) + goto out_migration_misuse; + /* * verify that any proto=/mountproto= options match the address * familiies in the addr=/mountaddr= options. @@ -1572,6 +1588,10 @@ out_minorversion_mismatch: printk(KERN_INFO "NFS: mount option vers=%u does not support " "minorversion=%u\n", mnt->version, mnt->minorversion); return 0; +out_migration_misuse: + printk(KERN_INFO + "NFS: 'migration' not supported for this NFS version\n"); + return 0; out_nomem: printk(KERN_INFO "NFS: not enough memory to parse option\n"); return 0; diff --git a/include/linux/nfs_fs_sb.h b/include/linux/nfs_fs_sb.h index 310c63c8ab2c..2e22fc7e47cf 100644 --- a/include/linux/nfs_fs_sb.h +++ b/include/linux/nfs_fs_sb.h @@ -39,6 +39,7 @@ struct nfs_client { unsigned long cl_flags; /* behavior switches */ #define NFS_CS_NORESVPORT 0 /* - use ephemeral src port */ #define NFS_CS_DISCRTRY 1 /* - disconnect on RPC retry */ +#define NFS_CS_MIGRATION 2 /* - transparent state migr */ struct sockaddr_storage cl_addr; /* server identifier */ size_t cl_addrlen; char * cl_hostname; /* hostname of server */ @@ -125,6 +126,7 @@ struct nfs_server { unsigned int namelen; unsigned int options; /* extra options enabled by mount */ #define NFS_OPTION_FSCACHE 0x00000001 /* - local caching enabled */ +#define NFS_OPTION_MIGRATION 0x00000002 /* - NFSv4 migration enabled */ struct nfs_fsid fsid; __u64 maxfilesize; /* maximum file size */ |