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nfsd: add notifier to handle mount/unmount of rpc_pipefs sb

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In the event that rpc_pipefs isn't mounted when nfsd starts, we
must register a notifier to handle creating the dentry once it
is mounted, and to remove the dentry on unmount.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
Jeff Layton
2012-03-21 09:52:08 -04:00
committed by J. Bruce Fields
parent f3f8014862
commit 813fd320c1
3 changed files with 53 additions and 1 deletions
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9
fs/nfsd/nfsctl.c
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@@ -13,6 +13,7 @@
#include <linux/sunrpc/clnt.h>
#include <linux/sunrpc/gss_api.h>
#include <linux/sunrpc/gss_krb5_enctypes.h>
#include <linux/sunrpc/rpc_pipe_fs.h>
#include <linux/module.h>
#include "idmap.h"
@@ -1136,9 +1137,12 @@ static int __init init_nfsd(void)
int retval;
printk(KERN_INFO "Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n");
retval = rpc_pipefs_notifier_register(&nfsd4_cld_block);
if (retval)
return retval;
retval = register_pernet_subsys(&nfsd_net_ops);
if (retval < 0)
return retval;
goto out_unregister_notifier;
retval = nfsd4_init_slabs();
if (retval)
goto out_unregister_pernet;
@@ -1181,6 +1185,8 @@ out_free_slabs:
nfsd4_free_slabs();
out_unregister_pernet:
unregister_pernet_subsys(&nfsd_net_ops);
out_unregister_notifier:
rpc_pipefs_notifier_unregister(&nfsd4_cld_block);
return retval;
}
@@ -1197,6 +1203,7 @@ static void __exit exit_nfsd(void)
nfsd_fault_inject_cleanup();
unregister_filesystem(&nfsd_fs_type);
unregister_pernet_subsys(&nfsd_net_ops);
rpc_pipefs_notifier_unregister(&nfsd4_cld_block);
}
MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");