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authorStanislav Kinsbursky <skinsbursky@parallels.com>2012-01-10 17:04:24 +0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2012-01-31 18:20:27 -0500
commit9e2e74dba6ddce94da187369b50a27536147d5df (patch)
treeb4c2e7570775f0d9b0477fdf26e5f99c91e61ac4 /fs/nfs
parent332dfab6f4e02d3c5897e9470492bee7d14f29cc (diff)
NFS: blocklayout pipe creation per network namespace context introduced
This patch implements blocklayout pipe creation and registration per each existent network namespace. This was achived by registering NFS per-net operations, responsible for blocklayout pipe allocation/register and unregister/destruction instead of initialization and destruction of static "bl_device_pipe" pipe (this one was removed). Note, than pointer to network blocklayout pipe is stored in per-net "nfs_net" structure, because allocating of one more per-net structure for blocklayout module looks redundant. This patch also changes dev_remove() function prototype (and all it's callers, where it' requied) by adding network namespace pointer parameter, which is used to discover proper blocklayout pipe for rpc_queue_upcall() call. Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs')
-rw-r--r--fs/nfs/blocklayout/blocklayout.c54
-rw-r--r--fs/nfs/blocklayout/blocklayout.h3
-rw-r--r--fs/nfs/blocklayout/blocklayoutdev.c5
-rw-r--r--fs/nfs/blocklayout/blocklayoutdm.c7
-rw-r--r--fs/nfs/inode.c1
-rw-r--r--fs/nfs/netns.h1
6 files changed, 47 insertions, 24 deletions
diff --git a/fs/nfs/blocklayout/blocklayout.c b/fs/nfs/blocklayout/blocklayout.c
index 80b0c4a4048..9da72b8a554 100644
--- a/fs/nfs/blocklayout/blocklayout.c
+++ b/fs/nfs/blocklayout/blocklayout.c
@@ -46,7 +46,6 @@ MODULE_LICENSE("GPL");
MODULE_AUTHOR("Andy Adamson <andros@citi.umich.edu>");
MODULE_DESCRIPTION("The NFSv4.1 pNFS Block layout driver");
-struct rpc_pipe *bl_device_pipe;
wait_queue_head_t bl_wq;
static void print_page(struct page *page)
@@ -1071,6 +1070,37 @@ static void nfs4blocklayout_unregister_net(struct net *net,
}
}
+static int nfs4blocklayout_net_init(struct net *net)
+{
+ struct nfs_net *nn = net_generic(net, nfs_net_id);
+ struct dentry *dentry;
+
+ nn->bl_device_pipe = rpc_mkpipe_data(&bl_upcall_ops, 0);
+ if (IS_ERR(nn->bl_device_pipe))
+ return PTR_ERR(nn->bl_device_pipe);
+ dentry = nfs4blocklayout_register_net(net, nn->bl_device_pipe);
+ if (IS_ERR(dentry)) {
+ rpc_destroy_pipe_data(nn->bl_device_pipe);
+ return PTR_ERR(dentry);
+ }
+ nn->bl_device_pipe->dentry = dentry;
+ return 0;
+}
+
+static void nfs4blocklayout_net_exit(struct net *net)
+{
+ struct nfs_net *nn = net_generic(net, nfs_net_id);
+
+ nfs4blocklayout_unregister_net(net, nn->bl_device_pipe);
+ rpc_destroy_pipe_data(nn->bl_device_pipe);
+ nn->bl_device_pipe = NULL;
+}
+
+static struct pernet_operations nfs4blocklayout_net_ops = {
+ .init = nfs4blocklayout_net_init,
+ .exit = nfs4blocklayout_net_exit,
+};
+
static int __init nfs4blocklayout_init(void)
{
struct vfsmount *mnt;
@@ -1089,24 +1119,12 @@ static int __init nfs4blocklayout_init(void)
ret = PTR_ERR(mnt);
goto out_remove;
}
- bl_device_pipe = rpc_mkpipe_data(&bl_upcall_ops, 0);
- if (IS_ERR(bl_device_pipe)) {
- ret = PTR_ERR(bl_device_pipe);
- goto out_putrpc;
- }
- bl_device_pipe->dentry = nfs4blocklayout_register_net(&init_net,
- bl_device_pipe);
- if (IS_ERR(bl_device_pipe->dentry)) {
- ret = PTR_ERR(bl_device_pipe->dentry);
- goto out_destroy_pipe;
- }
+ ret = register_pernet_subsys(&nfs4blocklayout_net_ops);
+ if (ret)
+ goto out_remove;
out:
return ret;
-out_destroy_pipe:
- rpc_destroy_pipe_data(bl_device_pipe);
-out_putrpc:
- rpc_put_mount();
out_remove:
pnfs_unregister_layoutdriver(&blocklayout_type);
return ret;
@@ -1117,10 +1135,8 @@ static void __exit nfs4blocklayout_exit(void)
dprintk("%s: NFSv4 Block Layout Driver Unregistering...\n",
__func__);
+ unregister_pernet_subsys(&nfs4blocklayout_net_ops);
pnfs_unregister_layoutdriver(&blocklayout_type);
- nfs4blocklayout_unregister_net(&init_net, bl_device_pipe);
- rpc_destroy_pipe_data(bl_device_pipe);
- rpc_put_mount();
}
MODULE_ALIAS("nfs-layouttype4-3");
diff --git a/fs/nfs/blocklayout/blocklayout.h b/fs/nfs/blocklayout/blocklayout.h
index 49c670b18a9..0966b39bbcf 100644
--- a/fs/nfs/blocklayout/blocklayout.h
+++ b/fs/nfs/blocklayout/blocklayout.h
@@ -37,6 +37,7 @@
#include <linux/sunrpc/rpc_pipe_fs.h>
#include "../pnfs.h"
+#include "../netns.h"
#define PAGE_CACHE_SECTORS (PAGE_CACHE_SIZE >> SECTOR_SHIFT)
#define PAGE_CACHE_SECTOR_SHIFT (PAGE_CACHE_SHIFT - SECTOR_SHIFT)
@@ -50,6 +51,7 @@ struct pnfs_block_dev {
struct list_head bm_node;
struct nfs4_deviceid bm_mdevid; /* associated devid */
struct block_device *bm_mdev; /* meta device itself */
+ struct net *net;
};
enum exstate4 {
@@ -161,7 +163,6 @@ struct bl_msg_hdr {
u16 totallen; /* length of entire message, including hdr itself */
};
-extern struct rpc_pipe *bl_device_pipe;
extern wait_queue_head_t bl_wq;
#define BL_DEVICE_UMOUNT 0x0 /* Umount--delete devices */
diff --git a/fs/nfs/blocklayout/blocklayoutdev.c b/fs/nfs/blocklayout/blocklayoutdev.c
index 949b6247879..94ed978860c 100644
--- a/fs/nfs/blocklayout/blocklayoutdev.c
+++ b/fs/nfs/blocklayout/blocklayoutdev.c
@@ -120,6 +120,8 @@ nfs4_blk_decode_device(struct nfs_server *server,
DECLARE_WAITQUEUE(wq, current);
struct bl_dev_msg *reply = &bl_mount_reply;
int offset, len, i, rc;
+ struct net *net = server->nfs_client->net;
+ struct nfs_net *nn = net_generic(net, nfs_net_id);
dprintk("%s CREATING PIPEFS MESSAGE\n", __func__);
dprintk("%s: deviceid: %s, mincount: %d\n", __func__, dev->dev_id.data,
@@ -146,7 +148,7 @@ nfs4_blk_decode_device(struct nfs_server *server,
dprintk("%s CALLING USERSPACE DAEMON\n", __func__);
add_wait_queue(&bl_wq, &wq);
- rc = rpc_queue_upcall(bl_device_pipe, &msg);
+ rc = rpc_queue_upcall(nn->bl_device_pipe, &msg);
if (rc < 0) {
remove_wait_queue(&bl_wq, &wq);
rv = ERR_PTR(rc);
@@ -181,6 +183,7 @@ nfs4_blk_decode_device(struct nfs_server *server,
rv->bm_mdev = bd;
memcpy(&rv->bm_mdevid, &dev->dev_id, sizeof(struct nfs4_deviceid));
+ rv->net = net;
dprintk("%s Created device %s with bd_block_size %u\n",
__func__,
bd->bd_disk->disk_name,
diff --git a/fs/nfs/blocklayout/blocklayoutdm.c b/fs/nfs/blocklayout/blocklayoutdm.c
index 631f254d12a..970490f556d 100644
--- a/fs/nfs/blocklayout/blocklayoutdm.c
+++ b/fs/nfs/blocklayout/blocklayoutdm.c
@@ -38,7 +38,7 @@
#define NFSDBG_FACILITY NFSDBG_PNFS_LD
-static void dev_remove(dev_t dev)
+static void dev_remove(struct net *net, dev_t dev)
{
struct rpc_pipe_msg msg;
struct bl_dev_msg bl_umount_request;
@@ -48,6 +48,7 @@ static void dev_remove(dev_t dev)
};
uint8_t *dataptr;
DECLARE_WAITQUEUE(wq, current);
+ struct nfs_net *nn = net_generic(net, nfs_net_id);
dprintk("Entering %s\n", __func__);
@@ -66,7 +67,7 @@ static void dev_remove(dev_t dev)
msg.len = sizeof(bl_msg) + bl_msg.totallen;
add_wait_queue(&bl_wq, &wq);
- if (rpc_queue_upcall(bl_device_pipe, &msg) < 0) {
+ if (rpc_queue_upcall(nn->bl_device_pipe, &msg) < 0) {
remove_wait_queue(&bl_wq, &wq);
goto out;
}
@@ -93,7 +94,7 @@ static void nfs4_blk_metadev_release(struct pnfs_block_dev *bdev)
printk(KERN_ERR "%s nfs4_blkdev_put returns %d\n",
__func__, rv);
- dev_remove(bdev->bm_mdev->bd_dev);
+ dev_remove(bdev->net, bdev->bm_mdev->bd_dev);
}
void bl_free_block_dev(struct pnfs_block_dev *bdev)
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index 0335f6e4ff7..577ad5a72a2 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -1554,6 +1554,7 @@ static void nfsiod_stop(void)
}
int nfs_net_id;
+EXPORT_SYMBOL_GPL(nfs_net_id);
static int nfs_net_init(struct net *net)
{
diff --git a/fs/nfs/netns.h b/fs/nfs/netns.h
index 8c1f130d6ca..39ae4cad5b4 100644
--- a/fs/nfs/netns.h
+++ b/fs/nfs/netns.h
@@ -6,6 +6,7 @@
struct nfs_net {
struct cache_detail *nfs_dns_resolve;
+ struct rpc_pipe *bl_device_pipe;
};
extern int nfs_net_id;