lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

NFS: new idmapper

Browse Source 
This patch creates a new idmapper system that uses the request-key function to
place a call into userspace to map user and group ids to names.  The old
idmapper was single threaded, which prevented more than one request from running
at a single time.  This means that a user would have to wait for an upcall to
finish before accessing a cached result.

The upcall result is stored on a keyring of type id_resolver.  See the file
Documentation/filesystems/nfs/idmapper.txt for instructions.

Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
[Trond: fix up the return value of nfs_idmap_lookup_name and clean up code]
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Bryan Schumaker
2010-09-29 15:41:49 -04:00
committed by Trond Myklebust
parent aa510da5bf
commit 955a857e06
8 changed files with 329 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
fs/nfs/inode.c
View File

@ -1526,6 +1526,10 @@ static int __init init_nfs_fs(void)
{
int err;
err = nfs_idmap_init();
if (err < 0)
goto out9;
err = nfs_dns_resolver_init();
if (err < 0)
goto out8;
@ -1590,6 +1594,8 @@ out6:
out7:
nfs_dns_resolver_destroy();
out8:
nfs_idmap_quit();
out9:
return err;
}
@ -1602,6 +1608,7 @@ static void __exit exit_nfs_fs(void)
nfs_destroy_nfspagecache();
nfs_fscache_unregister();
nfs_dns_resolver_destroy();
nfs_idmap_quit();
#ifdef CONFIG_PROC_FS
rpc_proc_unregister("nfs");
#endif