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Commit 6980128f authored by Eric W. Biederman's avatar Eric W. Biederman
Browse files

sysctl: Add sysctl_print_dir and use it in get_subdir 



When there are errors it is very nice to know the full sysctl path.
Add a simple function that computes the sysctl path and prints it
out.

Signed-off-by: default avatarEric W. Biederman <ebiederm@xmission.com>
parent 7ec66d06

fs/proc/proc_sysctl.c

+10 −1
Original line number Diff line number Diff line
@@ -53,6 +53,13 @@ static DEFINE_SPINLOCK(sysctl_lock); 


static void drop_sysctl_table(struct ctl_table_header *header);



static void sysctl_print_dir(struct ctl_dir *dir)

{

	if (dir->header.parent)

		sysctl_print_dir(dir->header.parent);

	printk(KERN_CONT "%s/", dir->header.ctl_table[0].procname);

}



static int namecmp(const char *name1, int len1, const char *name2, int len2)

{

	int minlen;
@@ -822,7 +829,9 @@ static struct ctl_dir *get_subdir(struct ctl_table_set *set, 
	subdir->header.nreg++;

failed:

	if (unlikely(IS_ERR(subdir))) {

		printk(KERN_ERR "sysctl could not get directory: %*.*s %ld\n",

		printk(KERN_ERR "sysctl could not get directory: ");

		sysctl_print_dir(dir);

		printk(KERN_CONT "/%*.*s %ld\n",

			namelen, namelen, name, PTR_ERR(subdir));

	}

	drop_sysctl_table(&dir->header);