summaryrefslogtreecommitdiffstats
path: root/fs/proc
diff options
context:
space:
mode:
authorChristoph Hellwig <hch@lst.de>2018-04-13 20:38:35 +0200
committerChristoph Hellwig <hch@lst.de>2018-05-16 07:24:30 +0200
commit3617d9496cd92dcca4d0893191d95554590d8d9f (patch)
tree3054a4c965a42aa4375b08f92b111e1943cd41c5 /fs/proc
parentc3506372277779fccbffee2475400fcd689d5738 (diff)
downloadlinux-3617d9496cd92dcca4d0893191d95554590d8d9f.tar.bz2
proc: introduce proc_create_net_single
Variant of proc_create_data that directly take a seq_file show callback and deals with network namespaces in ->open and ->release. All callers of proc_create + single_open_net converted over, and single_{open,release}_net are removed entirely. Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'fs/proc')
-rw-r--r--fs/proc/proc_net.c49
1 files changed, 31 insertions, 18 deletions
diff --git a/fs/proc/proc_net.c b/fs/proc/proc_net.c
index c99fd183f034..7d94fa005b0d 100644
--- a/fs/proc/proc_net.c
+++ b/fs/proc/proc_net.c
@@ -93,37 +93,50 @@ struct proc_dir_entry *proc_create_net_data(const char *name, umode_t mode,
}
EXPORT_SYMBOL_GPL(proc_create_net_data);
-int single_open_net(struct inode *inode, struct file *file,
- int (*show)(struct seq_file *, void *))
+static int single_open_net(struct inode *inode, struct file *file)
{
- int err;
+ struct proc_dir_entry *de = PDE(inode);
struct net *net;
+ int err;
- err = -ENXIO;
net = get_proc_net(inode);
- if (net == NULL)
- goto err_net;
-
- err = single_open(file, show, net);
- if (err < 0)
- goto err_open;
-
- return 0;
+ if (!net)
+ return -ENXIO;
-err_open:
- put_net(net);
-err_net:
+ err = single_open(file, de->single_show, net);
+ if (err)
+ put_net(net);
return err;
}
-EXPORT_SYMBOL_GPL(single_open_net);
-int single_release_net(struct inode *ino, struct file *f)
+static int single_release_net(struct inode *ino, struct file *f)
{
struct seq_file *seq = f->private_data;
put_net(seq->private);
return single_release(ino, f);
}
-EXPORT_SYMBOL_GPL(single_release_net);
+
+static const struct file_operations proc_net_single_fops = {
+ .open = single_open_net,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release_net,
+};
+
+struct proc_dir_entry *proc_create_net_single(const char *name, umode_t mode,
+ struct proc_dir_entry *parent,
+ int (*show)(struct seq_file *, void *), void *data)
+{
+ struct proc_dir_entry *p;
+
+ p = proc_create_reg(name, mode, &parent, data);
+ if (!p)
+ return NULL;
+ p->proc_fops = &proc_net_single_fops;
+ p->single_show = show;
+ return proc_register(parent, p);
+}
+EXPORT_SYMBOL_GPL(proc_create_net_single);
static struct net *get_proc_task_net(struct inode *dir)
{