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NFSv4: Implement the fs_locations function call

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NFSv4 allows for the fact that filesystems may be replicated across
several servers or that they may be migrated to a backup server in case of
failure of the primary server.
fs_locations is an NFSv4 operation for retrieving information about the
location of migrated and/or replicated filesystems.

Based on an initial implementation by Jiaying Zhang <jiayingz@citi.umich.edu>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Trond Myklebust
2006-06-09 09:34:22 -04:00
parent 8b23ea7bed
commit 683b57b435
5 changed files with 166 additions and 2 deletions
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29
fs/nfs/nfs4proc.c
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@@ -3570,6 +3570,35 @@ ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
return len;
}
int nfs4_proc_fs_locations(struct inode *dir, struct dentry *dentry,
struct nfs_fs_locations *fs_locations, struct page *page)
{
struct nfs_server *server = NFS_SERVER(dir);
u32 bitmask[2] = {
[0] = server->attr_bitmask[0] | FATTR4_WORD0_FS_LOCATIONS,
[1] = server->attr_bitmask[1],
};
struct nfs4_fs_locations_arg args = {
.dir_fh = NFS_FH(dir),
.name = &dentry->d_name,
.page = page,
.bitmask = bitmask,
};
struct rpc_message msg = {
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
.rpc_argp = &args,
.rpc_resp = &fs_locations,
};
int status;
dprintk("%s: start\n", __FUNCTION__);
fs_locations->fattr.valid = 0;
fs_locations->server = server;
status = rpc_call_sync(server->client, &msg, 0);
dprintk("%s: returned status = %d\n", __FUNCTION__, status);
return status;
}
struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = {
.recover_open = nfs4_open_reclaim,
.recover_lock = nfs4_lock_reclaim,