diff options
| -rw-r--r-- | fs/proc/proc_net.c | 38 | ||||
| -rw-r--r-- | include/linux/seq_file.h | 13 | ||||
| -rw-r--r-- | net/core/dev.c | 28 | ||||
| -rw-r--r-- | net/core/dev_mcast.c | 26 | ||||
| -rw-r--r-- | net/netlink/af_netlink.c | 33 | ||||
| -rw-r--r-- | net/packet/af_packet.c | 26 | ||||
| -rw-r--r-- | net/unix/af_unix.c | 31 | ||||
| -rw-r--r-- | net/wireless/wext.c | 24 |
8 files changed, 80 insertions, 139 deletions
diff --git a/fs/proc/proc_net.c b/fs/proc/proc_net.c index 0afe21ee0607..cfc4f6c072f1 100644 --- a/fs/proc/proc_net.c +++ b/fs/proc/proc_net.c @@ -22,10 +22,48 @@ #include <linux/mount.h> #include <linux/nsproxy.h> #include <net/net_namespace.h> +#include <linux/seq_file.h> #include "internal.h" +int seq_open_net(struct inode *ino, struct file *f, + const struct seq_operations *ops, int size) +{ + struct net *net; + struct seq_net_private *p; + + BUG_ON(size < sizeof(*p)); + + net = get_proc_net(ino); + if (net == NULL) + return -ENXIO; + + p = __seq_open_private(f, ops, size); + if (p == NULL) { + put_net(net); + return -ENOMEM; + } + p->net = net; + return 0; +} +EXPORT_SYMBOL_GPL(seq_open_net); + +int seq_release_net(struct inode *ino, struct file *f) +{ + struct seq_file *seq; + struct seq_net_private *p; + + seq = f->private_data; + p = seq->private; + + put_net(p->net); + seq_release_private(ino, f); + return 0; +} +EXPORT_SYMBOL_GPL(seq_release_net); + + struct proc_dir_entry *proc_net_fops_create(struct net *net, const char *name, mode_t mode, const struct file_operations *fops) { diff --git a/include/linux/seq_file.h b/include/linux/seq_file.h index ebbc02b325fc..648dfeb444db 100644 --- a/include/linux/seq_file.h +++ b/include/linux/seq_file.h @@ -63,5 +63,18 @@ extern struct list_head *seq_list_start_head(struct list_head *head, extern struct list_head *seq_list_next(void *v, struct list_head *head, loff_t *ppos); +struct net; +struct seq_net_private { + struct net *net; +}; + +int seq_open_net(struct inode *, struct file *, + const struct seq_operations *, int); +int seq_release_net(struct inode *, struct file *); +static inline struct net *seq_file_net(struct seq_file *seq) +{ + return ((struct seq_net_private *)seq->private)->net; +} + #endif #endif diff --git a/net/core/dev.c b/net/core/dev.c index 0879f52115eb..d0e23d8310ff 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -2364,7 +2364,7 @@ static int dev_ifconf(struct net *net, char __user *arg) */ void *dev_seq_start(struct seq_file *seq, loff_t *pos) { - struct net *net = seq->private; + struct net *net = seq_file_net(seq); loff_t off; struct net_device *dev; @@ -2382,7 +2382,7 @@ void *dev_seq_start(struct seq_file *seq, loff_t *pos) void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos) { - struct net *net = seq->private; + struct net *net = seq_file_net(seq); ++*pos; return v == SEQ_START_TOKEN ? first_net_device(net) : next_net_device((struct net_device *)v); @@ -2481,26 +2481,8 @@ static const struct seq_operations dev_seq_ops = { static int dev_seq_open(struct inode *inode, struct file *file) { - struct seq_file *seq; - int res; - res = seq_open(file, &dev_seq_ops); - if (!res) { - seq = file->private_data; - seq->private = get_proc_net(inode); - if (!seq->private) { - seq_release(inode, file); - res = -ENXIO; - } - } - return res; -} - -static int dev_seq_release(struct inode *inode, struct file *file) -{ - struct seq_file *seq = file->private_data; - struct net *net = seq->private; - put_net(net); - return seq_release(inode, file); + return seq_open_net(inode, file, &dev_seq_ops, + sizeof(struct seq_net_private)); } static const struct file_operations dev_seq_fops = { @@ -2508,7 +2490,7 @@ static const struct file_operations dev_seq_fops = { .open = dev_seq_open, .read = seq_read, .llseek = seq_lseek, - .release = dev_seq_release, + .release = seq_release_net, }; static const struct seq_operations softnet_seq_ops = { diff --git a/net/core/dev_mcast.c b/net/core/dev_mcast.c index 69fff16ece10..63f0b33d7ced 100644 --- a/net/core/dev_mcast.c +++ b/net/core/dev_mcast.c @@ -187,7 +187,7 @@ EXPORT_SYMBOL(dev_mc_unsync); #ifdef CONFIG_PROC_FS static void *dev_mc_seq_start(struct seq_file *seq, loff_t *pos) { - struct net *net = seq->private; + struct net *net = seq_file_net(seq); struct net_device *dev; loff_t off = 0; @@ -241,26 +241,8 @@ static const struct seq_operations dev_mc_seq_ops = { static int dev_mc_seq_open(struct inode *inode, struct file *file) { - struct seq_file *seq; - int res; - res = seq_open(file, &dev_mc_seq_ops); - if (!res) { - seq = file->private_data; - seq->private = get_proc_net(inode); - if (!seq->private) { - seq_release(inode, file); - res = -ENXIO; - } - } - return res; -} - -static int dev_mc_seq_release(struct inode *inode, struct file *file) -{ - struct seq_file *seq = file->private_data; - struct net *net = seq->private; - put_net(net); - return seq_release(inode, file); + return seq_open_net(inode, file, &dev_mc_seq_ops, + sizeof(struct seq_net_private)); } static const struct file_operations dev_mc_seq_fops = { @@ -268,7 +250,7 @@ static const struct file_operations dev_mc_seq_fops = { .open = dev_mc_seq_open, .read = seq_read, .llseek = seq_lseek, - .release = dev_mc_seq_release, + .release = seq_release_net, }; #endif diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c index de3988ba1f46..1518244ffad9 100644 --- a/net/netlink/af_netlink.c +++ b/net/netlink/af_netlink.c @@ -1681,7 +1681,7 @@ int nlmsg_notify(struct sock *sk, struct sk_buff *skb, u32 pid, #ifdef CONFIG_PROC_FS struct nl_seq_iter { - struct net *net; + struct seq_net_private p; int link; int hash_idx; }; @@ -1699,7 +1699,7 @@ static struct sock *netlink_seq_socket_idx(struct seq_file *seq, loff_t pos) for (j = 0; j <= hash->mask; j++) { sk_for_each(s, node, &hash->table[j]) { - if (iter->net != s->sk_net) + if (iter->p.net != s->sk_net) continue; if (off == pos) { iter->link = i; @@ -1734,7 +1734,7 @@ static void *netlink_seq_next(struct seq_file *seq, void *v, loff_t *pos) s = v; do { s = sk_next(s); - } while (s && (iter->net != s->sk_net)); + } while (s && (iter->p.net != s->sk_net)); if (s) return s; @@ -1746,7 +1746,7 @@ static void *netlink_seq_next(struct seq_file *seq, void *v, loff_t *pos) for (; j <= hash->mask; j++) { s = sk_head(&hash->table[j]); - while (s && (iter->net != s->sk_net)) + while (s && (iter->p.net != s->sk_net)) s = sk_next(s); if (s) { iter->link = i; @@ -1802,27 +1802,8 @@ static const struct seq_operations netlink_seq_ops = { static int netlink_seq_open(struct inode *inode, struct file *file) { - struct nl_seq_iter *iter; - - iter = __seq_open_private(file, &netlink_seq_ops, sizeof(*iter)); - if (!iter) - return -ENOMEM; - - iter->net = get_proc_net(inode); - if (!iter->net) { - seq_release_private(inode, file); - return -ENXIO; - } - - return 0; -} - -static int netlink_seq_release(struct inode *inode, struct file *file) -{ - struct seq_file *seq = file->private_data; - struct nl_seq_iter *iter = seq->private; - put_net(iter->net); - return seq_release_private(inode, file); + return seq_open_net(inode, file, &netlink_seq_ops, + sizeof(struct nl_seq_iter)); } static const struct file_operations netlink_seq_fops = { @@ -1830,7 +1811,7 @@ static const struct file_operations netlink_seq_fops = { .open = netlink_seq_open, .read = seq_read, .llseek = seq_lseek, - .release = netlink_seq_release, + .release = seq_release_net, }; #endif diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c index 45e3cbcb2763..ace29f1c4c5b 100644 --- a/net/packet/af_packet.c +++ b/net/packet/af_packet.c @@ -1871,7 +1871,7 @@ static inline struct sock *packet_seq_idx(struct net *net, loff_t off) static void *packet_seq_start(struct seq_file *seq, loff_t *pos) { - struct net *net = seq->private; + struct net *net = seq_file_net(seq); read_lock(&net->packet_sklist_lock); return *pos ? packet_seq_idx(net, *pos - 1) : SEQ_START_TOKEN; } @@ -1924,26 +1924,8 @@ static const struct seq_operations packet_seq_ops = { static int packet_seq_open(struct inode *inode, struct file *file) { - struct seq_file *seq; - int res; - res = seq_open(file, &packet_seq_ops); - if (!res) { - seq = file->private_data; - seq->private = get_proc_net(inode); - if (!seq->private) { - seq_release(inode, file); - res = -ENXIO; - } - } - return res; -} - -static int packet_seq_release(struct inode *inode, struct file *file) -{ - struct seq_file *seq= file->private_data; - struct net *net = seq->private; - put_net(net); - return seq_release(inode, file); + return seq_open_net(inode, file, &packet_seq_ops, + sizeof(struct seq_net_private)); } static const struct file_operations packet_seq_fops = { @@ -1951,7 +1933,7 @@ static const struct file_operations packet_seq_fops = { .open = packet_seq_open, .read = seq_read, .llseek = seq_lseek, - .release = packet_seq_release, + .release = seq_release_net, }; #endif diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c index ecad42b72ad6..eacddb21a9b4 100644 --- a/net/unix/af_unix.c +++ b/net/unix/af_unix.c @@ -2018,7 +2018,7 @@ static unsigned int unix_poll(struct file * file, struct socket *sock, poll_tabl #ifdef CONFIG_PROC_FS struct unix_iter_state { - struct net *net; + struct seq_net_private p; int i; }; static struct sock *unix_seq_idx(struct unix_iter_state *iter, loff_t pos) @@ -2027,7 +2027,7 @@ static struct sock *unix_seq_idx(struct unix_iter_state *iter, loff_t pos) struct sock *s; for (s = first_unix_socket(&iter->i); s; s = next_unix_socket(&iter->i, s)) { - if (s->sk_net != iter->net) + if (s->sk_net != iter->p.net) continue; if (off == pos) return s; @@ -2054,7 +2054,7 @@ static void *unix_seq_next(struct seq_file *seq, void *v, loff_t *pos) sk = first_unix_socket(&iter->i); else sk = next_unix_socket(&iter->i, sk); - while (sk && (sk->sk_net != iter->net)) + while (sk && (sk->sk_net != iter->p.net)) sk = next_unix_socket(&iter->i, sk); return sk; } @@ -2118,27 +2118,8 @@ static const struct seq_operations unix_seq_ops = { static int unix_seq_open(struct inode *inode, struct file *file) { - struct unix_iter_state *it; - - it = __seq_open_private(file, &unix_seq_ops, - sizeof(struct unix_iter_state)); - if (it == NULL) - return -ENOMEM; - - it->net = get_proc_net(inode); - if (it->net == NULL) { - seq_release_private(inode, file); - return -ENXIO; - } - return 0; -} - -static int unix_seq_release(struct inode *inode, struct file *file) -{ - struct seq_file *seq = file->private_data; - struct unix_iter_state *iter = seq->private; - put_net(iter->net); - return seq_release_private(inode, file); + return seq_open_net(inode, file, &unix_seq_ops, + sizeof(struct unix_iter_state)); } static const struct file_operations unix_seq_fops = { @@ -2146,7 +2127,7 @@ static const struct file_operations unix_seq_fops = { .open = unix_seq_open, .read = seq_read, .llseek = seq_lseek, - .release = unix_seq_release, + .release = seq_release_net, }; #endif diff --git a/net/wireless/wext.c b/net/wireless/wext.c index db03ed5ce055..1e4cf615f878 100644 --- a/net/wireless/wext.c +++ b/net/wireless/wext.c @@ -673,26 +673,8 @@ static const struct seq_operations wireless_seq_ops = { static int wireless_seq_open(struct inode *inode, struct file *file) { - struct seq_file *seq; - int res; - res = seq_open(file, &wireless_seq_ops); - if (!res) { - seq = file->private_data; - seq->private = get_proc_net(inode); - if (!seq->private) { - seq_release(inode, file); - res = -ENXIO; - } - } - return res; -} - -static int wireless_seq_release(struct inode *inode, struct file *file) -{ - struct seq_file *seq = file->private_data; - struct net *net = seq->private; - put_net(net); - return seq_release(inode, file); + return seq_open_net(inode, file, &wireless_seq_ops, + sizeof(struct seq_net_private)); } static const struct file_operations wireless_seq_fops = { @@ -700,7 +682,7 @@ static const struct file_operations wireless_seq_fops = { .open = wireless_seq_open, .read = seq_read, .llseek = seq_lseek, - .release = wireless_seq_release, + .release = seq_release_net, }; int wext_proc_init(struct net *net) |