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sysctl: Add sysctl_print_dir and use it in get_subdir

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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: Eric W. Biederman <ebiederm@xmission.com>
This commit is contained in:
Eric W. Biederman 2012-01-21 20:09:45 -08:00
parent 7ec66d0636
commit 6980128fe1
1 changed files with 10 additions and 1 deletions
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11
fs/proc/proc_sysctl.c
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@ -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);