From 9adec1a808603698bd7ff47f3883bd7cd1383f90 Mon Sep 17 00:00:00 2001 From: Roland Dreier Date: Sat, 16 Apr 2005 15:26:07 -0700 Subject: [PATCH] IPoIB: convert to debugfs Convert IPoIB to use debugfs instead of its own custom debugging filesystem. Signed-off-by: Roland Dreier Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/infiniband/ulp/ipoib/ipoib_fs.c | 140 ++++---------------------------- 1 file changed, 14 insertions(+), 126 deletions(-) (limited to 'drivers/infiniband/ulp/ipoib/ipoib_fs.c') diff --git a/drivers/infiniband/ulp/ipoib/ipoib_fs.c b/drivers/infiniband/ulp/ipoib/ipoib_fs.c index 044f2c7..a84e5fe 100644 --- a/drivers/infiniband/ulp/ipoib/ipoib_fs.c +++ b/drivers/infiniband/ulp/ipoib/ipoib_fs.c @@ -32,19 +32,16 @@ * $Id: ipoib_fs.c 1389 2004-12-27 22:56:47Z roland $ */ -#include +#include #include -#include "ipoib.h" +struct file_operations; -enum { - IPOIB_MAGIC = 0x49504942 /* "IPIB" */ -}; +#include + +#include "ipoib.h" -static DECLARE_MUTEX(ipoib_fs_mutex); static struct dentry *ipoib_root; -static struct super_block *ipoib_sb; -static LIST_HEAD(ipoib_device_list); static void *ipoib_mcg_seq_start(struct seq_file *file, loff_t *pos) { @@ -145,143 +142,34 @@ static struct file_operations ipoib_fops = { .release = seq_release }; -static struct inode *ipoib_get_inode(void) -{ - struct inode *inode = new_inode(ipoib_sb); - - if (inode) { - inode->i_mode = S_IFREG | S_IRUGO; - inode->i_uid = 0; - inode->i_gid = 0; - inode->i_blksize = PAGE_CACHE_SIZE; - inode->i_blocks = 0; - inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; - inode->i_fop = &ipoib_fops; - } - - return inode; -} - -static int __ipoib_create_debug_file(struct net_device *dev) +int ipoib_create_debug_file(struct net_device *dev) { struct ipoib_dev_priv *priv = netdev_priv(dev); - struct dentry *dentry; - struct inode *inode; char name[IFNAMSIZ + sizeof "_mcg"]; snprintf(name, sizeof name, "%s_mcg", dev->name); - dentry = d_alloc_name(ipoib_root, name); - if (!dentry) - return -ENOMEM; - - inode = ipoib_get_inode(); - if (!inode) { - dput(dentry); - return -ENOMEM; - } - - inode->u.generic_ip = dev; - priv->mcg_dentry = dentry; - - d_add(dentry, inode); - - return 0; -} - -int ipoib_create_debug_file(struct net_device *dev) -{ - struct ipoib_dev_priv *priv = netdev_priv(dev); - - down(&ipoib_fs_mutex); - - list_add_tail(&priv->fs_list, &ipoib_device_list); - - if (!ipoib_sb) { - up(&ipoib_fs_mutex); - return 0; - } - - up(&ipoib_fs_mutex); + priv->mcg_dentry = debugfs_create_file(name, S_IFREG | S_IRUGO, + ipoib_root, dev, &ipoib_fops); - return __ipoib_create_debug_file(dev); + return priv->mcg_dentry ? 0 : -ENOMEM; } void ipoib_delete_debug_file(struct net_device *dev) { struct ipoib_dev_priv *priv = netdev_priv(dev); - down(&ipoib_fs_mutex); - list_del(&priv->fs_list); - if (!ipoib_sb) { - up(&ipoib_fs_mutex); - return; - } - up(&ipoib_fs_mutex); - - if (priv->mcg_dentry) { - d_drop(priv->mcg_dentry); - simple_unlink(ipoib_root->d_inode, priv->mcg_dentry); - } -} - -static int ipoib_fill_super(struct super_block *sb, void *data, int silent) -{ - static struct tree_descr ipoib_files[] = { - { "" } - }; - struct ipoib_dev_priv *priv; - int ret; - - ret = simple_fill_super(sb, IPOIB_MAGIC, ipoib_files); - if (ret) - return ret; - - ipoib_root = sb->s_root; - - down(&ipoib_fs_mutex); - - ipoib_sb = sb; - - list_for_each_entry(priv, &ipoib_device_list, fs_list) { - ret = __ipoib_create_debug_file(priv->dev); - if (ret) - break; - } - - up(&ipoib_fs_mutex); - - return ret; -} - -static struct super_block *ipoib_get_sb(struct file_system_type *fs_type, - int flags, const char *dev_name, void *data) -{ - return get_sb_single(fs_type, flags, data, ipoib_fill_super); + if (priv->mcg_dentry) + debugfs_remove(priv->mcg_dentry); } -static void ipoib_kill_sb(struct super_block *sb) -{ - down(&ipoib_fs_mutex); - ipoib_sb = NULL; - up(&ipoib_fs_mutex); - - kill_litter_super(sb); -} - -static struct file_system_type ipoib_fs_type = { - .owner = THIS_MODULE, - .name = "ipoib_debugfs", - .get_sb = ipoib_get_sb, - .kill_sb = ipoib_kill_sb, -}; - int ipoib_register_debugfs(void) { - return register_filesystem(&ipoib_fs_type); + ipoib_root = debugfs_create_dir("ipoib", NULL); + return ipoib_root ? 0 : -ENOMEM; } void ipoib_unregister_debugfs(void) { - unregister_filesystem(&ipoib_fs_type); + debugfs_remove(ipoib_root); } -- cgit v1.1