Convert /proc/device-tree/ to seq_file (e22f6283) · Commits · 戴 / test

fs/proc/proc_devtree.c

+21 −20

Original line number	Diff line number	Diff line
		@@ -7,6 +7,7 @@
		#include <linux/init.h>
		#include <linux/time.h>
		#include <linux/proc_fs.h>
		#include <linux/seq_file.h>
		#include <linux/stat.h>
		#include <linux/string.h>
		#include <asm/prom.h>
		@@ -25,26 +26,27 @@ static struct proc_dir_entry *proc_device_tree;
		/*
		* Supply data on a read from /proc/device-tree/node/property.
		*/
		static int property_read_proc(char page, char *start, off_t off,
		int count, int eof, void data)
		static int property_proc_show(struct seq_file m, void v)
		{
		struct property *pp = data;
		int n;
		struct property *pp = m->private;

		if (off >= pp->length) {
		*eof = 1;
		seq_write(m, pp->value, pp->length);
		return 0;
		}
		n = pp->length - off;
		if (n > count)
		n = count;
		else
		*eof = 1;
		memcpy(page, (char *)pp->value + off, n);
		*start = page;
		return n;

		static int property_proc_open(struct inode inode, struct file file)
		{
		return single_open(file, property_proc_show, PDE(inode)->data);
		}

		static const struct file_operations property_proc_fops = {
		.owner = THIS_MODULE,
		.open = property_proc_open,
		.read = seq_read,
		.llseek = seq_lseek,
		.release = single_release,
		};

		/*
		* For a node with a name like "gc@10", we make symlinks called "gc"
		* and "@10" to it.
		@@ -63,10 +65,9 @@ __proc_device_tree_add_prop(struct proc_dir_entry de, struct property pp,
		* Unfortunately proc_register puts each new entry
		* at the beginning of the list. So we rearrange them.
		*/
		ent = create_proc_read_entry(name,
		strncmp(name, "security-", 9)
		? S_IRUGO : S_IRUSR, de,
		property_read_proc, pp);
		ent = proc_create_data(name,
		strncmp(name, "security-", 9) ? S_IRUGO : S_IRUSR,
		de, &property_proc_fops, pp);
		if (ent == NULL)
		return NULL;

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