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-rw-r--r--net/sunrpc/rpc_pipe.c83
1 files changed, 41 insertions, 42 deletions
diff --git a/net/sunrpc/rpc_pipe.c b/net/sunrpc/rpc_pipe.c
index 08580bedc25f..6d152f69587e 100644
--- a/net/sunrpc/rpc_pipe.c
+++ b/net/sunrpc/rpc_pipe.c
@@ -639,26 +639,6 @@ static struct dentry *__rpc_lookup_create_exclusive(struct dentry *parent,
639 return ERR_PTR(-EEXIST); 639 return ERR_PTR(-EEXIST);
640} 640}
641 641
642static struct dentry *rpc_lookup_negative(const char *path,
643 struct nameidata *nd)
644{
645 struct inode *dir;
646 struct dentry *dentry;
647 int error;
648
649 error = rpc_lookup_parent(path, nd);
650 if (error != 0)
651 return ERR_PTR(error);
652 dir = nd->path.dentry->d_inode;
653 mutex_lock_nested(&dir->i_mutex, I_MUTEX_PARENT);
654 dentry = __rpc_lookup_create_exclusive(nd->path.dentry, &nd->last);
655 if (IS_ERR(dentry)) {
656 mutex_unlock(&dir->i_mutex);
657 rpc_release_path(nd);
658 }
659 return dentry;
660}
661
662/* 642/*
663 * FIXME: This probably has races. 643 * FIXME: This probably has races.
664 */ 644 */
@@ -754,44 +734,30 @@ out_bad:
754 return err; 734 return err;
755} 735}
756 736
757/** 737struct dentry *rpc_mkdir_populate(struct dentry *parent,
758 * rpc_create_client_dir - Create a new rpc_client directory in rpc_pipefs 738 struct qstr *name, umode_t mode, void *private)
759 * @path: path from the rpc_pipefs root to the new directory
760 * @rpc_client: rpc client to associate with this directory
761 *
762 * This creates a directory at the given @path associated with
763 * @rpc_clnt, which will contain a file named "info" with some basic
764 * information about the client, together with any "pipes" that may
765 * later be created using rpc_mkpipe().
766 */
767struct dentry *rpc_create_client_dir(const char *path,
768 struct rpc_clnt *rpc_client)
769{ 739{
770 struct nameidata nd;
771 struct dentry *dentry; 740 struct dentry *dentry;
772 struct inode *dir; 741 struct inode *dir = parent->d_inode;
773 int error; 742 int error;
774 743
775 dentry = rpc_lookup_negative(path, &nd); 744 mutex_lock_nested(&dir->i_mutex, I_MUTEX_PARENT);
745 dentry = __rpc_lookup_create_exclusive(parent, name);
776 if (IS_ERR(dentry)) 746 if (IS_ERR(dentry))
777 return dentry; 747 goto out;
778 dir = nd.path.dentry->d_inode; 748 error = __rpc_mkdir(dir, dentry, mode, NULL, private);
779 error = __rpc_mkdir(dir, dentry, S_IRUGO | S_IXUGO, NULL, rpc_client);
780 if (error != 0) 749 if (error != 0)
781 goto out_err; 750 goto out_err;
782 error = rpc_populate(dentry, authfiles, 751 error = rpc_populate(dentry, authfiles,
783 RPCAUTH_info, RPCAUTH_EOF, rpc_client); 752 RPCAUTH_info, RPCAUTH_EOF, private);
784 if (error) 753 if (error)
785 goto err_rmdir; 754 goto err_rmdir;
786out: 755out:
787 mutex_unlock(&dir->i_mutex); 756 mutex_unlock(&dir->i_mutex);
788 rpc_release_path(&nd);
789 return dentry; 757 return dentry;
790err_rmdir: 758err_rmdir:
791 __rpc_rmdir(dir, dentry); 759 __rpc_rmdir(dir, dentry);
792out_err: 760out_err:
793 printk(KERN_WARNING "%s: %s() failed to create directory %s (errno = %d)\n",
794 __FILE__, __func__, path, error);
795 dentry = ERR_PTR(error); 761 dentry = ERR_PTR(error);
796 goto out; 762 goto out;
797} 763}
@@ -913,6 +879,39 @@ rpc_unlink(struct dentry *dentry)
913} 879}
914EXPORT_SYMBOL_GPL(rpc_unlink); 880EXPORT_SYMBOL_GPL(rpc_unlink);
915 881
882/**
883 * rpc_create_client_dir - Create a new rpc_client directory in rpc_pipefs
884 * @path: path from the rpc_pipefs root to the new directory
885 * @rpc_client: rpc client to associate with this directory
886 *
887 * This creates a directory at the given @path associated with
888 * @rpc_clnt, which will contain a file named "info" with some basic
889 * information about the client, together with any "pipes" that may
890 * later be created using rpc_mkpipe().
891 */
892struct dentry *rpc_create_client_dir(const char *path,
893 struct rpc_clnt *rpc_client)
894{
895 struct nameidata nd;
896 struct dentry *ret;
897 struct inode *dir;
898
899 ret = ERR_PTR(rpc_lookup_parent(path, &nd));
900 if (IS_ERR(ret))
901 goto out_err;
902 dir = nd.path.dentry->d_inode;
903
904 ret = rpc_mkdir_populate(nd.path.dentry, &nd.last,
905 S_IRUGO | S_IXUGO, rpc_client);
906 rpc_release_path(&nd);
907 if (!IS_ERR(ret))
908 return ret;
909out_err:
910 printk(KERN_WARNING "%s: %s() failed to create directory %s (errno = %ld)\n",
911 __FILE__, __func__, path, PTR_ERR(ret));
912 return ret;
913}
914
916/* 915/*
917 * populate the filesystem 916 * populate the filesystem
918 */ 917 */