mirror of https://gitee.com/openkylin/linux.git
pnfs/blocklayout: move all rpc_pipefs related code into a single file
Create a file to house all the rpc_pipefs boilerplate code instead of sprinkling it over a few files. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
This commit is contained in:
Christoph Hellwig
Trond Myklebust
parent
ca0fe1dfa5
commit
871760ce97
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@ -2,5 +2,5 @@
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# Makefile for the pNFS block layout driver kernel module
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#
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obj-$(CONFIG_PNFS_BLOCK) += blocklayoutdriver.o
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blocklayoutdriver-objs := blocklayout.o blocklayoutdev.o blocklayoutdm.o \
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extent_tree.o
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blocklayoutdriver-y += blocklayout.o extent_tree.o rpc_pipefs.o
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@ -863,132 +863,6 @@ static struct pnfs_layoutdriver_type blocklayout_type = {
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.pg_write_ops = &bl_pg_write_ops,
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};
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static const struct rpc_pipe_ops bl_upcall_ops = {
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.upcall = rpc_pipe_generic_upcall,
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.downcall = bl_pipe_downcall,
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.destroy_msg = bl_pipe_destroy_msg,
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};
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static struct dentry *nfs4blocklayout_register_sb(struct super_block *sb,
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struct rpc_pipe *pipe)
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{
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struct dentry *dir, *dentry;
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dir = rpc_d_lookup_sb(sb, NFS_PIPE_DIRNAME);
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if (dir == NULL)
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return ERR_PTR(-ENOENT);
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dentry = rpc_mkpipe_dentry(dir, "blocklayout", NULL, pipe);
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dput(dir);
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return dentry;
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}
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static void nfs4blocklayout_unregister_sb(struct super_block *sb,
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struct rpc_pipe *pipe)
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{
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if (pipe->dentry)
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rpc_unlink(pipe->dentry);
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}
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static int rpc_pipefs_event(struct notifier_block *nb, unsigned long event,
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void *ptr)
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{
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struct super_block *sb = ptr;
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struct net *net = sb->s_fs_info;
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struct nfs_net *nn = net_generic(net, nfs_net_id);
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struct dentry *dentry;
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int ret = 0;
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if (!try_module_get(THIS_MODULE))
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return 0;
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if (nn->bl_device_pipe == NULL) {
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module_put(THIS_MODULE);
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return 0;
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}
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switch (event) {
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case RPC_PIPEFS_MOUNT:
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dentry = nfs4blocklayout_register_sb(sb, nn->bl_device_pipe);
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if (IS_ERR(dentry)) {
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ret = PTR_ERR(dentry);
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break;
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}
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nn->bl_device_pipe->dentry = dentry;
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break;
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case RPC_PIPEFS_UMOUNT:
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if (nn->bl_device_pipe->dentry)
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nfs4blocklayout_unregister_sb(sb, nn->bl_device_pipe);
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break;
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default:
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ret = -ENOTSUPP;
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break;
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}
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module_put(THIS_MODULE);
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return ret;
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}
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static struct notifier_block nfs4blocklayout_block = {
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.notifier_call = rpc_pipefs_event,
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};
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static struct dentry *nfs4blocklayout_register_net(struct net *net,
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struct rpc_pipe *pipe)
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{
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struct super_block *pipefs_sb;
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struct dentry *dentry;
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pipefs_sb = rpc_get_sb_net(net);
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if (!pipefs_sb)
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return NULL;
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dentry = nfs4blocklayout_register_sb(pipefs_sb, pipe);
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rpc_put_sb_net(net);
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return dentry;
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}
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static void nfs4blocklayout_unregister_net(struct net *net,
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struct rpc_pipe *pipe)
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{
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struct super_block *pipefs_sb;
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pipefs_sb = rpc_get_sb_net(net);
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if (pipefs_sb) {
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nfs4blocklayout_unregister_sb(pipefs_sb, pipe);
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rpc_put_sb_net(net);
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}
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}
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static int nfs4blocklayout_net_init(struct net *net)
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{
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struct nfs_net *nn = net_generic(net, nfs_net_id);
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struct dentry *dentry;
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init_waitqueue_head(&nn->bl_wq);
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nn->bl_device_pipe = rpc_mkpipe_data(&bl_upcall_ops, 0);
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if (IS_ERR(nn->bl_device_pipe))
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return PTR_ERR(nn->bl_device_pipe);
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dentry = nfs4blocklayout_register_net(net, nn->bl_device_pipe);
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if (IS_ERR(dentry)) {
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rpc_destroy_pipe_data(nn->bl_device_pipe);
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return PTR_ERR(dentry);
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}
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nn->bl_device_pipe->dentry = dentry;
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return 0;
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}
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static void nfs4blocklayout_net_exit(struct net *net)
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{
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struct nfs_net *nn = net_generic(net, nfs_net_id);
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nfs4blocklayout_unregister_net(net, nn->bl_device_pipe);
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rpc_destroy_pipe_data(nn->bl_device_pipe);
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nn->bl_device_pipe = NULL;
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}
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static struct pernet_operations nfs4blocklayout_net_ops = {
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.init = nfs4blocklayout_net_init,
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.exit = nfs4blocklayout_net_exit,
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};
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static int __init nfs4blocklayout_init(void)
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{
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int ret;
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@ -998,20 +872,14 @@ static int __init nfs4blocklayout_init(void)
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ret = pnfs_register_layoutdriver(&blocklayout_type);
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if (ret)
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goto out;
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ret = rpc_pipefs_notifier_register(&nfs4blocklayout_block);
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ret = bl_init_pipefs();
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if (ret)
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goto out_remove;
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ret = register_pernet_subsys(&nfs4blocklayout_net_ops);
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if (ret)
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goto out_notifier;
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out:
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return ret;
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goto out_unregister;
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return 0;
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out_notifier:
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rpc_pipefs_notifier_unregister(&nfs4blocklayout_block);
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out_remove:
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out_unregister:
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pnfs_unregister_layoutdriver(&blocklayout_type);
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out:
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return ret;
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}
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@ -1020,8 +888,7 @@ static void __exit nfs4blocklayout_exit(void)
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dprintk("%s: NFSv4 Block Layout Driver Unregistering...\n",
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__func__);
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rpc_pipefs_notifier_unregister(&nfs4blocklayout_block);
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unregister_pernet_subsys(&nfs4blocklayout_net_ops);
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bl_cleanup_pipefs();
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pnfs_unregister_layoutdriver(&blocklayout_type);
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}
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@ -110,17 +110,6 @@ struct bl_msg_hdr {
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#define BL_DEVICE_REQUEST_PROC 0x1 /* User level process succeeds */
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#define BL_DEVICE_REQUEST_ERR 0x2 /* User level process fails */
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/* blocklayoutdev.c */
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ssize_t bl_pipe_downcall(struct file *, const char __user *, size_t);
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void bl_pipe_destroy_msg(struct rpc_pipe_msg *);
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struct nfs4_deviceid_node *bl_alloc_deviceid_node(struct nfs_server *server,
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struct pnfs_device *pdev, gfp_t gfp_mask);
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void bl_free_deviceid_node(struct nfs4_deviceid_node *d);
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/* blocklayoutdm.c */
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void bl_dm_remove(struct net *net, dev_t dev);
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/* extent_tree.c */
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int ext_tree_insert(struct pnfs_block_layout *bl,
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struct pnfs_block_extent *new);
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@ -133,4 +122,12 @@ bool ext_tree_lookup(struct pnfs_block_layout *bl, sector_t isect,
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int ext_tree_prepare_commit(struct nfs4_layoutcommit_args *arg);
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void ext_tree_mark_committed(struct nfs4_layoutcommit_args *arg, int status);
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/* rpc_pipefs.c */
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struct nfs4_deviceid_node *bl_alloc_deviceid_node(struct nfs_server *server,
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struct pnfs_device *pdev, gfp_t gfp_mask);
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void bl_free_deviceid_node(struct nfs4_deviceid_node *d);
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int __init bl_init_pipefs(void);
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void __exit bl_cleanup_pipefs(void);
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#endif /* FS_NFS_NFS4BLOCKLAYOUT_H */
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@ -1,172 +0,0 @@
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/*
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* linux/fs/nfs/blocklayout/blocklayoutdev.c
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*
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* Device operations for the pnfs nfs4 file layout driver.
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*
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* Copyright (c) 2006 The Regents of the University of Michigan.
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* All rights reserved.
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*
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* Andy Adamson <andros@citi.umich.edu>
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* Fred Isaman <iisaman@umich.edu>
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*
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* permission is granted to use, copy, create derivative works and
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* redistribute this software and such derivative works for any purpose,
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* so long as the name of the university of michigan is not used in
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* any advertising or publicity pertaining to the use or distribution
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* of this software without specific, written prior authorization. if
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* the above copyright notice or any other identification of the
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* university of michigan is included in any copy of any portion of
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* this software, then the disclaimer below must also be included.
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*
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* this software is provided as is, without representation from the
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* university of michigan as to its fitness for any purpose, and without
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* warranty by the university of michigan of any kind, either express
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* or implied, including without limitation the implied warranties of
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* merchantability and fitness for a particular purpose. the regents
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* of the university of michigan shall not be liable for any damages,
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* including special, indirect, incidental, or consequential damages,
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* with respect to any claim arising out or in connection with the use
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* of the software, even if it has been or is hereafter advised of the
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* possibility of such damages.
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*/
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#include <linux/module.h>
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#include <linux/buffer_head.h> /* __bread */
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#include <linux/genhd.h>
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#include <linux/blkdev.h>
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#include <linux/hash.h>
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#include "blocklayout.h"
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#define NFSDBG_FACILITY NFSDBG_PNFS_LD
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ssize_t bl_pipe_downcall(struct file *filp, const char __user *src,
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size_t mlen)
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{
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struct nfs_net *nn = net_generic(filp->f_dentry->d_sb->s_fs_info,
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nfs_net_id);
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if (mlen != sizeof (struct bl_dev_msg))
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return -EINVAL;
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if (copy_from_user(&nn->bl_mount_reply, src, mlen) != 0)
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return -EFAULT;
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wake_up(&nn->bl_wq);
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return mlen;
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}
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void bl_pipe_destroy_msg(struct rpc_pipe_msg *msg)
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{
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struct bl_pipe_msg *bl_pipe_msg = container_of(msg, struct bl_pipe_msg, msg);
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if (msg->errno >= 0)
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return;
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wake_up(bl_pipe_msg->bl_wq);
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}
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/*
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* Decodes pnfs_block_deviceaddr4 which is XDR encoded in dev->dev_addr_buf.
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*/
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struct nfs4_deviceid_node *
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bl_alloc_deviceid_node(struct nfs_server *server, struct pnfs_device *dev,
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gfp_t gfp_mask)
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{
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struct pnfs_block_dev *rv;
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struct block_device *bd;
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struct bl_pipe_msg bl_pipe_msg;
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struct rpc_pipe_msg *msg = &bl_pipe_msg.msg;
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struct bl_msg_hdr bl_msg = {
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.type = BL_DEVICE_MOUNT,
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.totallen = dev->mincount,
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};
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uint8_t *dataptr;
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DECLARE_WAITQUEUE(wq, current);
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int offset, len, i, rc;
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struct net *net = server->nfs_client->cl_net;
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struct nfs_net *nn = net_generic(net, nfs_net_id);
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struct bl_dev_msg *reply = &nn->bl_mount_reply;
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dprintk("%s CREATING PIPEFS MESSAGE\n", __func__);
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dprintk("%s: deviceid: %s, mincount: %d\n", __func__, dev->dev_id.data,
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dev->mincount);
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bl_pipe_msg.bl_wq = &nn->bl_wq;
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memset(msg, 0, sizeof(*msg));
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msg->data = kzalloc(sizeof(bl_msg) + dev->mincount, gfp_mask);
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if (!msg->data)
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goto out;
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memcpy(msg->data, &bl_msg, sizeof(bl_msg));
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dataptr = (uint8_t *) msg->data;
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len = dev->mincount;
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offset = sizeof(bl_msg);
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for (i = 0; len > 0; i++) {
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memcpy(&dataptr[offset], page_address(dev->pages[i]),
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len < PAGE_CACHE_SIZE ? len : PAGE_CACHE_SIZE);
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len -= PAGE_CACHE_SIZE;
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offset += PAGE_CACHE_SIZE;
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}
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msg->len = sizeof(bl_msg) + dev->mincount;
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dprintk("%s CALLING USERSPACE DAEMON\n", __func__);
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add_wait_queue(&nn->bl_wq, &wq);
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rc = rpc_queue_upcall(nn->bl_device_pipe, msg);
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if (rc < 0) {
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remove_wait_queue(&nn->bl_wq, &wq);
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goto out;
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}
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set_current_state(TASK_UNINTERRUPTIBLE);
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schedule();
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__set_current_state(TASK_RUNNING);
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remove_wait_queue(&nn->bl_wq, &wq);
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if (reply->status != BL_DEVICE_REQUEST_PROC) {
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printk(KERN_WARNING "%s failed to decode device: %d\n",
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__func__, reply->status);
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goto out;
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}
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bd = blkdev_get_by_dev(MKDEV(reply->major, reply->minor),
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FMODE_READ, NULL);
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if (IS_ERR(bd)) {
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printk(KERN_WARNING "%s failed to open device %d:%d (%ld)\n",
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__func__, reply->major, reply->minor,
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PTR_ERR(bd));
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goto out;
|
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}
|
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|
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rv = kzalloc(sizeof(*rv), gfp_mask);
|
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if (!rv)
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goto out;
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nfs4_init_deviceid_node(&rv->d_node, server, &dev->dev_id);
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rv->d_bdev = bd;
|
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|
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dprintk("%s Created device %s with bd_block_size %u\n",
|
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__func__,
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bd->bd_disk->disk_name,
|
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bd->bd_block_size);
|
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|
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kfree(msg->data);
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return &rv->d_node;
|
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|
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out:
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kfree(msg->data);
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return NULL;
|
||||
}
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|
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void
|
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bl_free_deviceid_node(struct nfs4_deviceid_node *d)
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{
|
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struct pnfs_block_dev *dev =
|
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container_of(d, struct pnfs_block_dev, d_node);
|
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struct net *net = d->nfs_client->cl_net;
|
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|
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blkdev_put(dev->d_bdev, FMODE_READ);
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bl_dm_remove(net, dev->d_bdev->bd_dev);
|
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kfree(dev);
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||||
}
|
||||
|
|
@ -1,84 +0,0 @@
|
|||
/*
|
||||
* linux/fs/nfs/blocklayout/blocklayoutdm.c
|
||||
*
|
||||
* Module for the NFSv4.1 pNFS block layout driver.
|
||||
*
|
||||
* Copyright (c) 2007 The Regents of the University of Michigan.
|
||||
* All rights reserved.
|
||||
*
|
||||
* Fred Isaman <iisaman@umich.edu>
|
||||
* Andy Adamson <andros@citi.umich.edu>
|
||||
*
|
||||
* permission is granted to use, copy, create derivative works and
|
||||
* redistribute this software and such derivative works for any purpose,
|
||||
* so long as the name of the university of michigan is not used in
|
||||
* any advertising or publicity pertaining to the use or distribution
|
||||
* of this software without specific, written prior authorization. if
|
||||
* the above copyright notice or any other identification of the
|
||||
* university of michigan is included in any copy of any portion of
|
||||
* this software, then the disclaimer below must also be included.
|
||||
*
|
||||
* this software is provided as is, without representation from the
|
||||
* university of michigan as to its fitness for any purpose, and without
|
||||
* warranty by the university of michigan of any kind, either express
|
||||
* or implied, including without limitation the implied warranties of
|
||||
* merchantability and fitness for a particular purpose. the regents
|
||||
* of the university of michigan shall not be liable for any damages,
|
||||
* including special, indirect, incidental, or consequential damages,
|
||||
* with respect to any claim arising out or in connection with the use
|
||||
* of the software, even if it has been or is hereafter advised of the
|
||||
* possibility of such damages.
|
||||
*/
|
||||
|
||||
#include <linux/genhd.h> /* gendisk - used in a dprintk*/
|
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#include <linux/sched.h>
|
||||
#include <linux/hash.h>
|
||||
|
||||
#include "blocklayout.h"
|
||||
|
||||
#define NFSDBG_FACILITY NFSDBG_PNFS_LD
|
||||
|
||||
void bl_dm_remove(struct net *net, dev_t dev)
|
||||
{
|
||||
struct bl_pipe_msg bl_pipe_msg;
|
||||
struct rpc_pipe_msg *msg = &bl_pipe_msg.msg;
|
||||
struct bl_dev_msg bl_umount_request;
|
||||
struct bl_msg_hdr bl_msg = {
|
||||
.type = BL_DEVICE_UMOUNT,
|
||||
.totallen = sizeof(bl_umount_request),
|
||||
};
|
||||
uint8_t *dataptr;
|
||||
DECLARE_WAITQUEUE(wq, current);
|
||||
struct nfs_net *nn = net_generic(net, nfs_net_id);
|
||||
|
||||
dprintk("Entering %s\n", __func__);
|
||||
|
||||
bl_pipe_msg.bl_wq = &nn->bl_wq;
|
||||
memset(msg, 0, sizeof(*msg));
|
||||
msg->len = sizeof(bl_msg) + bl_msg.totallen;
|
||||
msg->data = kzalloc(msg->len, GFP_NOFS);
|
||||
if (!msg->data)
|
||||
goto out;
|
||||
|
||||
memset(&bl_umount_request, 0, sizeof(bl_umount_request));
|
||||
bl_umount_request.major = MAJOR(dev);
|
||||
bl_umount_request.minor = MINOR(dev);
|
||||
|
||||
memcpy(msg->data, &bl_msg, sizeof(bl_msg));
|
||||
dataptr = (uint8_t *) msg->data;
|
||||
memcpy(&dataptr[sizeof(bl_msg)], &bl_umount_request, sizeof(bl_umount_request));
|
||||
|
||||
add_wait_queue(&nn->bl_wq, &wq);
|
||||
if (rpc_queue_upcall(nn->bl_device_pipe, msg) < 0) {
|
||||
remove_wait_queue(&nn->bl_wq, &wq);
|
||||
goto out;
|
||||
}
|
||||
|
||||
set_current_state(TASK_UNINTERRUPTIBLE);
|
||||
schedule();
|
||||
__set_current_state(TASK_RUNNING);
|
||||
remove_wait_queue(&nn->bl_wq, &wq);
|
||||
|
||||
out:
|
||||
kfree(msg->data);
|
||||
}
|
||||
|
|
@ -0,0 +1,362 @@
|
|||
/*
|
||||
* Copyright (c) 2006,2007 The Regents of the University of Michigan.
|
||||
* All rights reserved.
|
||||
*
|
||||
* Andy Adamson <andros@citi.umich.edu>
|
||||
* Fred Isaman <iisaman@umich.edu>
|
||||
*
|
||||
* permission is granted to use, copy, create derivative works and
|
||||
* redistribute this software and such derivative works for any purpose,
|
||||
* so long as the name of the university of michigan is not used in
|
||||
* any advertising or publicity pertaining to the use or distribution
|
||||
* of this software without specific, written prior authorization. if
|
||||
* the above copyright notice or any other identification of the
|
||||
* university of michigan is included in any copy of any portion of
|
||||
* this software, then the disclaimer below must also be included.
|
||||
*
|
||||
* this software is provided as is, without representation from the
|
||||
* university of michigan as to its fitness for any purpose, and without
|
||||
* warranty by the university of michigan of any kind, either express
|
||||
* or implied, including without limitation the implied warranties of
|
||||
* merchantability and fitness for a particular purpose. the regents
|
||||
* of the university of michigan shall not be liable for any damages,
|
||||
* including special, indirect, incidental, or consequential damages,
|
||||
* with respect to any claim arising out or in connection with the use
|
||||
* of the software, even if it has been or is hereafter advised of the
|
||||
* possibility of such damages.
|
||||
*/
|
||||
|
||||
#include <linux/module.h>
|
||||
#include <linux/genhd.h>
|
||||
#include <linux/blkdev.h>
|
||||
|
||||
#include "blocklayout.h"
|
||||
|
||||
#define NFSDBG_FACILITY NFSDBG_PNFS_LD
|
||||
|
||||
static void bl_dm_remove(struct net *net, dev_t dev)
|
||||
{
|
||||
struct bl_pipe_msg bl_pipe_msg;
|
||||
struct rpc_pipe_msg *msg = &bl_pipe_msg.msg;
|
||||
struct bl_dev_msg bl_umount_request;
|
||||
struct bl_msg_hdr bl_msg = {
|
||||
.type = BL_DEVICE_UMOUNT,
|
||||
.totallen = sizeof(bl_umount_request),
|
||||
};
|
||||
uint8_t *dataptr;
|
||||
DECLARE_WAITQUEUE(wq, current);
|
||||
struct nfs_net *nn = net_generic(net, nfs_net_id);
|
||||
|
||||
dprintk("Entering %s\n", __func__);
|
||||
|
||||
bl_pipe_msg.bl_wq = &nn->bl_wq;
|
||||
memset(msg, 0, sizeof(*msg));
|
||||
msg->len = sizeof(bl_msg) + bl_msg.totallen;
|
||||
msg->data = kzalloc(msg->len, GFP_NOFS);
|
||||
if (!msg->data)
|
||||
goto out;
|
||||
|
||||
memset(&bl_umount_request, 0, sizeof(bl_umount_request));
|
||||
bl_umount_request.major = MAJOR(dev);
|
||||
bl_umount_request.minor = MINOR(dev);
|
||||
|
||||
memcpy(msg->data, &bl_msg, sizeof(bl_msg));
|
||||
dataptr = (uint8_t *) msg->data;
|
||||
memcpy(&dataptr[sizeof(bl_msg)], &bl_umount_request, sizeof(bl_umount_request));
|
||||
|
||||
add_wait_queue(&nn->bl_wq, &wq);
|
||||
if (rpc_queue_upcall(nn->bl_device_pipe, msg) < 0) {
|
||||
remove_wait_queue(&nn->bl_wq, &wq);
|
||||
goto out;
|
||||
}
|
||||
|
||||
set_current_state(TASK_UNINTERRUPTIBLE);
|
||||
schedule();
|
||||
__set_current_state(TASK_RUNNING);
|
||||
remove_wait_queue(&nn->bl_wq, &wq);
|
||||
|
||||
out:
|
||||
kfree(msg->data);
|
||||
}
|
||||
|
||||
/*
|
||||
* Decodes pnfs_block_deviceaddr4 which is XDR encoded in dev->dev_addr_buf.
|
||||
*/
|
||||
struct nfs4_deviceid_node *
|
||||
bl_alloc_deviceid_node(struct nfs_server *server, struct pnfs_device *dev,
|
||||
gfp_t gfp_mask)
|
||||
{
|
||||
struct pnfs_block_dev *rv;
|
||||
struct block_device *bd;
|
||||
struct bl_pipe_msg bl_pipe_msg;
|
||||
struct rpc_pipe_msg *msg = &bl_pipe_msg.msg;
|
||||
struct bl_msg_hdr bl_msg = {
|
||||
.type = BL_DEVICE_MOUNT,
|
||||
.totallen = dev->mincount,
|
||||
};
|
||||
uint8_t *dataptr;
|
||||
DECLARE_WAITQUEUE(wq, current);
|
||||
int offset, len, i, rc;
|
||||
struct net *net = server->nfs_client->cl_net;
|
||||
struct nfs_net *nn = net_generic(net, nfs_net_id);
|
||||
struct bl_dev_msg *reply = &nn->bl_mount_reply;
|
||||
|
||||
dprintk("%s CREATING PIPEFS MESSAGE\n", __func__);
|
||||
dprintk("%s: deviceid: %s, mincount: %d\n", __func__, dev->dev_id.data,
|
||||
dev->mincount);
|
||||
|
||||
bl_pipe_msg.bl_wq = &nn->bl_wq;
|
||||
memset(msg, 0, sizeof(*msg));
|
||||
msg->data = kzalloc(sizeof(bl_msg) + dev->mincount, gfp_mask);
|
||||
if (!msg->data)
|
||||
goto out;
|
||||
|
||||
memcpy(msg->data, &bl_msg, sizeof(bl_msg));
|
||||
dataptr = (uint8_t *) msg->data;
|
||||
len = dev->mincount;
|
||||
offset = sizeof(bl_msg);
|
||||
for (i = 0; len > 0; i++) {
|
||||
memcpy(&dataptr[offset], page_address(dev->pages[i]),
|
||||
len < PAGE_CACHE_SIZE ? len : PAGE_CACHE_SIZE);
|
||||
len -= PAGE_CACHE_SIZE;
|
||||
offset += PAGE_CACHE_SIZE;
|
||||
}
|
||||
msg->len = sizeof(bl_msg) + dev->mincount;
|
||||
|
||||
dprintk("%s CALLING USERSPACE DAEMON\n", __func__);
|
||||
add_wait_queue(&nn->bl_wq, &wq);
|
||||
rc = rpc_queue_upcall(nn->bl_device_pipe, msg);
|
||||
if (rc < 0) {
|
||||
remove_wait_queue(&nn->bl_wq, &wq);
|
||||
goto out;
|
||||
}
|
||||
|
||||
set_current_state(TASK_UNINTERRUPTIBLE);
|
||||
schedule();
|
||||
__set_current_state(TASK_RUNNING);
|
||||
remove_wait_queue(&nn->bl_wq, &wq);
|
||||
|
||||
if (reply->status != BL_DEVICE_REQUEST_PROC) {
|
||||
printk(KERN_WARNING "%s failed to decode device: %d\n",
|
||||
__func__, reply->status);
|
||||
goto out;
|
||||
}
|
||||
|
||||
bd = blkdev_get_by_dev(MKDEV(reply->major, reply->minor),
|
||||
FMODE_READ, NULL);
|
||||
if (IS_ERR(bd)) {
|
||||
printk(KERN_WARNING "%s failed to open device %d:%d (%ld)\n",
|
||||
__func__, reply->major, reply->minor,
|
||||
PTR_ERR(bd));
|
||||
goto out;
|
||||
}
|
||||
|
||||
rv = kzalloc(sizeof(*rv), gfp_mask);
|
||||
if (!rv)
|
||||
goto out;
|
||||
|
||||
nfs4_init_deviceid_node(&rv->d_node, server, &dev->dev_id);
|
||||
rv->d_bdev = bd;
|
||||
|
||||
dprintk("%s Created device %s with bd_block_size %u\n",
|
||||
__func__,
|
||||
bd->bd_disk->disk_name,
|
||||
bd->bd_block_size);
|
||||
|
||||
kfree(msg->data);
|
||||
return &rv->d_node;
|
||||
|
||||
out:
|
||||
kfree(msg->data);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
void
|
||||
bl_free_deviceid_node(struct nfs4_deviceid_node *d)
|
||||
{
|
||||
struct pnfs_block_dev *dev =
|
||||
container_of(d, struct pnfs_block_dev, d_node);
|
||||
struct net *net = d->nfs_client->cl_net;
|
||||
|
||||
blkdev_put(dev->d_bdev, FMODE_READ);
|
||||
bl_dm_remove(net, dev->d_bdev->bd_dev);
|
||||
|
||||
kfree(dev);
|
||||
}
|
||||
|
||||
static ssize_t bl_pipe_downcall(struct file *filp, const char __user *src,
|
||||
size_t mlen)
|
||||
{
|
||||
struct nfs_net *nn = net_generic(filp->f_dentry->d_sb->s_fs_info,
|
||||
nfs_net_id);
|
||||
|
||||
if (mlen != sizeof (struct bl_dev_msg))
|
||||
return -EINVAL;
|
||||
|
||||
if (copy_from_user(&nn->bl_mount_reply, src, mlen) != 0)
|
||||
return -EFAULT;
|
||||
|
||||
wake_up(&nn->bl_wq);
|
||||
|
||||
return mlen;
|
||||
}
|
||||
|
||||
static void bl_pipe_destroy_msg(struct rpc_pipe_msg *msg)
|
||||
{
|
||||
struct bl_pipe_msg *bl_pipe_msg =
|
||||
container_of(msg, struct bl_pipe_msg, msg);
|
||||
|
||||
if (msg->errno >= 0)
|
||||
return;
|
||||
wake_up(bl_pipe_msg->bl_wq);
|
||||
}
|
||||
|
||||
static const struct rpc_pipe_ops bl_upcall_ops = {
|
||||
.upcall = rpc_pipe_generic_upcall,
|
||||
.downcall = bl_pipe_downcall,
|
||||
.destroy_msg = bl_pipe_destroy_msg,
|
||||
};
|
||||
|
||||
static struct dentry *nfs4blocklayout_register_sb(struct super_block *sb,
|
||||
struct rpc_pipe *pipe)
|
||||
{
|
||||
struct dentry *dir, *dentry;
|
||||
|
||||
dir = rpc_d_lookup_sb(sb, NFS_PIPE_DIRNAME);
|
||||
if (dir == NULL)
|
||||
return ERR_PTR(-ENOENT);
|
||||
dentry = rpc_mkpipe_dentry(dir, "blocklayout", NULL, pipe);
|
||||
dput(dir);
|
||||
return dentry;
|
||||
}
|
||||
|
||||
static void nfs4blocklayout_unregister_sb(struct super_block *sb,
|
||||
struct rpc_pipe *pipe)
|
||||
{
|
||||
if (pipe->dentry)
|
||||
rpc_unlink(pipe->dentry);
|
||||
}
|
||||
|
||||
static int rpc_pipefs_event(struct notifier_block *nb, unsigned long event,
|
||||
void *ptr)
|
||||
{
|
||||
struct super_block *sb = ptr;
|
||||
struct net *net = sb->s_fs_info;
|
||||
struct nfs_net *nn = net_generic(net, nfs_net_id);
|
||||
struct dentry *dentry;
|
||||
int ret = 0;
|
||||
|
||||
if (!try_module_get(THIS_MODULE))
|
||||
return 0;
|
||||
|
||||
if (nn->bl_device_pipe == NULL) {
|
||||
module_put(THIS_MODULE);
|
||||
return 0;
|
||||
}
|
||||
|
||||
switch (event) {
|
||||
case RPC_PIPEFS_MOUNT:
|
||||
dentry = nfs4blocklayout_register_sb(sb, nn->bl_device_pipe);
|
||||
if (IS_ERR(dentry)) {
|
||||
ret = PTR_ERR(dentry);
|
||||
break;
|
||||
}
|
||||
nn->bl_device_pipe->dentry = dentry;
|
||||
break;
|
||||
case RPC_PIPEFS_UMOUNT:
|
||||
if (nn->bl_device_pipe->dentry)
|
||||
nfs4blocklayout_unregister_sb(sb, nn->bl_device_pipe);
|
||||
break;
|
||||
default:
|
||||
ret = -ENOTSUPP;
|
||||
break;
|
||||
}
|
||||
module_put(THIS_MODULE);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static struct notifier_block nfs4blocklayout_block = {
|
||||
.notifier_call = rpc_pipefs_event,
|
||||
};
|
||||
|
||||
static struct dentry *nfs4blocklayout_register_net(struct net *net,
|
||||
struct rpc_pipe *pipe)
|
||||
{
|
||||
struct super_block *pipefs_sb;
|
||||
struct dentry *dentry;
|
||||
|
||||
pipefs_sb = rpc_get_sb_net(net);
|
||||
if (!pipefs_sb)
|
||||
return NULL;
|
||||
dentry = nfs4blocklayout_register_sb(pipefs_sb, pipe);
|
||||
rpc_put_sb_net(net);
|
||||
return dentry;
|
||||
}
|
||||
|
||||
static void nfs4blocklayout_unregister_net(struct net *net,
|
||||
struct rpc_pipe *pipe)
|
||||
{
|
||||
struct super_block *pipefs_sb;
|
||||
|
||||
pipefs_sb = rpc_get_sb_net(net);
|
||||
if (pipefs_sb) {
|
||||
nfs4blocklayout_unregister_sb(pipefs_sb, pipe);
|
||||
rpc_put_sb_net(net);
|
||||
}
|
||||
}
|
||||
|
||||
static int nfs4blocklayout_net_init(struct net *net)
|
||||
{
|
||||
struct nfs_net *nn = net_generic(net, nfs_net_id);
|
||||
struct dentry *dentry;
|
||||
|
||||
init_waitqueue_head(&nn->bl_wq);
|
||||
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,
|
||||
};
|
||||
|
||||
int __init bl_init_pipefs(void)
|
||||
{
|
||||
int ret;
|
||||
|
||||
ret = rpc_pipefs_notifier_register(&nfs4blocklayout_block);
|
||||
if (ret)
|
||||
goto out;
|
||||
ret = register_pernet_subsys(&nfs4blocklayout_net_ops);
|
||||
if (ret)
|
||||
goto out_unregister_notifier;
|
||||
return 0;
|
||||
|
||||
out_unregister_notifier:
|
||||
rpc_pipefs_notifier_unregister(&nfs4blocklayout_block);
|
||||
out:
|
||||
return ret;
|
||||
}
|
||||
|
||||
void __exit bl_cleanup_pipefs(void)
|
||||
{
|
||||
rpc_pipefs_notifier_unregister(&nfs4blocklayout_block);
|
||||
unregister_pernet_subsys(&nfs4blocklayout_net_ops);
|
||||
}
|
||||
Loading…
Reference in New Issue