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| author |   Bryan Schumaker <bjschuma@netapp.com> | 2010-09-29 15:41:49 -0400 |
|---|---|---|
| committer |   Trond Myklebust <Trond.Myklebust@netapp.com> | 2010-10-07 18:48:49 -0400 |
| commit | 955a857e062642cd3ebe1dc7bb38c0f85d8f8f17 (patch) | |
| tree | f95fc349c245c4a0a3f6f8fcc5bf02f36a756134 /fs/nfs/sysctl.c | |
| parent | NFS: We must use list_for_each_entry_safe in nfs_access_cache_shrinker (diff) | |
| download | linux-dev-955a857e062642cd3ebe1dc7bb38c0f85d8f8f17.tar.xz linux-dev-955a857e062642cd3ebe1dc7bb38c0f85d8f8f17.zip | |
NFS: new idmapper
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>
Diffstat (limited to 'fs/nfs/sysctl.c')
| -rw-r--r-- | fs/nfs/sysctl.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/nfs/sysctl.c b/fs/nfs/sysctl.c index ad4d2e787b20..978aaeb8a093 100644 --- a/fs/nfs/sysctl.c +++ b/fs/nfs/sysctl.c @@ -32,6 +32,7 @@ static ctl_table nfs_cb_sysctls[] = { .extra1 = (int *)&nfs_set_port_min, .extra2 = (int *)&nfs_set_port_max, }, +#ifndef CONFIG_NFS_USE_NEW_IDMAPPER { .procname = "idmap_cache_timeout", .data = &nfs_idmap_cache_timeout, @@ -39,6 +40,7 @@ static ctl_table nfs_cb_sysctls[] = { .mode = 0644, .proc_handler = proc_dointvec_jiffies, }, +#endif /* CONFIG_NFS_USE_NEW_IDMAPPER */ #endif { .procname = "nfs_mountpoint_timeout", |