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Commit 1d98c16d authored by Christoph Hellwig's avatar Christoph Hellwig
Browse files

netfilter/x_tables: simplify ѕeq_file code 



Just use the address family from the proc private data instead of copying
it into per-file data.

Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
parent 2ad17b19

net/netfilter/x_tables.c

+11 −28
Original line number Diff line number Diff line
@@ -1489,15 +1489,10 @@ void *xt_unregister_table(struct xt_table *table) 
EXPORT_SYMBOL_GPL(xt_unregister_table);



#ifdef CONFIG_PROC_FS

struct xt_names_priv {

	struct seq_net_private p;

	u_int8_t af;

};

static void *xt_table_seq_start(struct seq_file *seq, loff_t *pos)

{

	struct xt_names_priv *priv = seq->private;

	struct net *net = seq_file_net(seq);

	u_int8_t af = priv->af;

	u_int8_t af = (unsigned long)PDE_DATA(file_inode(seq->file));



	mutex_lock(&xt[af].mutex);

	return seq_list_start(&net->xt.tables[af], *pos);
@@ -1505,17 +1500,15 @@ static void *xt_table_seq_start(struct seq_file *seq, loff_t *pos) 


static void *xt_table_seq_next(struct seq_file *seq, void *v, loff_t *pos)

{

	struct xt_names_priv *priv = seq->private;

	struct net *net = seq_file_net(seq);

	u_int8_t af = priv->af;

	u_int8_t af = (unsigned long)PDE_DATA(file_inode(seq->file));



	return seq_list_next(v, &net->xt.tables[af], pos);

}



static void xt_table_seq_stop(struct seq_file *seq, void *v)

{

	struct xt_names_priv *priv = seq->private;

	u_int8_t af = priv->af;

	u_int8_t af = (unsigned long)PDE_DATA(file_inode(seq->file));



	mutex_unlock(&xt[af].mutex);

}
@@ -1538,16 +1531,8 @@ static const struct seq_operations xt_table_seq_ops = { 


static int xt_table_open(struct inode *inode, struct file *file)

{

	int ret;

	struct xt_names_priv *priv;



	ret = seq_open_net(inode, file, &xt_table_seq_ops,

			   sizeof(struct xt_names_priv));

	if (!ret) {

		priv = ((struct seq_file *)file->private_data)->private;

		priv->af = (unsigned long)PDE_DATA(inode);

	}

	return ret;

	return seq_open_net(inode, file, &xt_table_seq_ops,

			sizeof(struct seq_net_private));

}



static const struct file_operations xt_table_ops = {
@@ -1563,7 +1548,7 @@ static const struct file_operations xt_table_ops = { 
 */

struct nf_mttg_trav {

	struct list_head *head, *curr;

	uint8_t class, nfproto;

	uint8_t class;

};



enum {
@@ -1580,6 +1565,7 @@ static void *xt_mttg_seq_next(struct seq_file *seq, void *v, loff_t *ppos, 
		[MTTG_TRAV_NFP_UNSPEC] = MTTG_TRAV_NFP_SPEC,

		[MTTG_TRAV_NFP_SPEC]   = MTTG_TRAV_DONE,

	};

	uint8_t nfproto = (unsigned long)PDE_DATA(file_inode(seq->file));

	struct nf_mttg_trav *trav = seq->private;



	switch (trav->class) {
@@ -1594,9 +1580,9 @@ static void *xt_mttg_seq_next(struct seq_file *seq, void *v, loff_t *ppos, 
		if (trav->curr != trav->head)

			break;

		mutex_unlock(&xt[NFPROTO_UNSPEC].mutex);

		mutex_lock(&xt[trav->nfproto].mutex);

		mutex_lock(&xt[nfproto].mutex);

		trav->head = trav->curr = is_target ?

			&xt[trav->nfproto].target : &xt[trav->nfproto].match;

			&xt[nfproto].target : &xt[nfproto].match;

		trav->class = next_class[trav->class];

		break;

	case MTTG_TRAV_NFP_SPEC:
@@ -1628,6 +1614,7 @@ static void *xt_mttg_seq_start(struct seq_file *seq, loff_t *pos, 


static void xt_mttg_seq_stop(struct seq_file *seq, void *v)

{

	uint8_t nfproto = (unsigned long)PDE_DATA(file_inode(seq->file));

	struct nf_mttg_trav *trav = seq->private;



	switch (trav->class) {
@@ -1635,7 +1622,7 @@ static void xt_mttg_seq_stop(struct seq_file *seq, void *v) 
		mutex_unlock(&xt[NFPROTO_UNSPEC].mutex);

		break;

	case MTTG_TRAV_NFP_SPEC:

		mutex_unlock(&xt[trav->nfproto].mutex);

		mutex_unlock(&xt[nfproto].mutex);

		break;

	}

}
@@ -1680,8 +1667,6 @@ static int xt_match_open(struct inode *inode, struct file *file) 
	trav = __seq_open_private(file, &xt_match_seq_ops, sizeof(*trav));

	if (!trav)

		return -ENOMEM;



	trav->nfproto = (unsigned long)PDE_DATA(inode);

	return 0;

}
@@ -1732,8 +1717,6 @@ static int xt_target_open(struct inode *inode, struct file *file) 
	trav = __seq_open_private(file, &xt_target_seq_ops, sizeof(*trav));

	if (!trav)

		return -ENOMEM;



	trav->nfproto = (unsigned long)PDE_DATA(inode);

	return 0;

}