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Home » Mailing lists » Devel » [PATCH v3, RESEND 01/16] sunrpc: mount rpc_pipefs on initialization
[PATCH v3, RESEND 01/16] sunrpc: mount rpc_pipefs on initialization [message #42045] Tue, 08 February 2011 18:41
Kirill A. Shutemov is currently offline  Kirill A. Shutemov
Messages: 37
Registered: January 2011
Member
From: *parallels.com
Mount rpc_pipefs on register_rpc_pipefs() and replace
rpc_get_mount()/rpc_put_mount() implementation with mntget()/mntput().

This commit introduces temprorary regression: there is no way to
remove the module. It will be fixed at the end of the patchset.

Signed-off-by: Kirill A. Shutemov <kas@openvz.org>
Reviewed-by: Rob Landley <rlandley@parallels.com>
---
net/sunrpc/rpc_pipe.c | 26 +++++++++++++++-----------
1 files changed, 15 insertions(+), 11 deletions(-)

diff --git a/net/sunrpc/rpc_pipe.c b/net/sunrpc/rpc_pipe.c
index 72bc536..9ab9355 100644
--- a/net/sunrpc/rpc_pipe.c
+++ b/net/sunrpc/rpc_pipe.c
@@ -29,7 +29,6 @@
#include <linux/sunrpc/cache.h>

static struct vfsmount *rpc_mnt __read_mostly;
-static int rpc_mount_count;

static struct file_system_type rpc_pipe_fs_type;

@@ -423,18 +422,13 @@ struct rpc_filelist {

struct vfsmount *rpc_get_mount(void)
{
- int err;
-
- err = simple_pin_fs(&rpc_pipe_fs_type, &rpc_mnt, &rpc_mount_count);
- if (err != 0)
- return ERR_PTR(err);
- return rpc_mnt;
+ return mntget(rpc_mnt);
}
EXPORT_SYMBOL_GPL(rpc_get_mount);

void rpc_put_mount(void)
{
- simple_release_fs(&rpc_mnt, &rpc_mount_count);
+ mntput(rpc_mnt);
}
EXPORT_SYMBOL_GPL(rpc_put_mount);

@@ -1071,12 +1065,22 @@ int register_rpc_pipefs(void)
if (!rpc_inode_cachep)
return -ENOMEM;
err = register_filesystem(&rpc_pipe_fs_type);
- if (err) {
- kmem_cache_destroy(rpc_inode_cachep);
- return err;
+ if (err)
+ goto destroy_cache;
+
+ rpc_mnt = kern_mount(&rpc_pipe_fs_type);
+ if (IS_ERR(rpc_mnt)) {
+ err = PTR_ERR(rpc_mnt);
+ goto unregister_fs;
}

return 0;
+
+unregister_fs:
+ unregister_filesystem(&rpc_pipe_fs_type);
+destroy_cache:
+ kmem_cache_destroy(rpc_inode_cachep);
+ return err;
}

void unregister_rpc_pipefs(void)
--
1.7.4

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