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@xxxxxxxxxxxx>
---
fs/proc/proc_sysctl.c | 11 ++++++++++-
1 files changed, 10 insertions(+), 1 deletions(-)
diff --git a/fs/proc/proc_sysctl.c b/fs/proc/proc_sysctl.c
index 3c0767d..a785565 100644
--- a/fs/proc/proc_sysctl.c
+++ b/fs/proc/proc_sysctl.c
@@ -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 @@ found:
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);
--
1.7.2.5
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