The sunrpc debug sysctl files only accept decimal number right now.
But all the XXXDBUG_XXX macros are defined as hexadecimal.
It is not easy to set or check an separate flag.
This patch let those files support accepting hexadecimal number,
(decimal number is also supported). Also, display it as hexadecimal.
v2,
Remove duplicate parsing of '0x...', just using simple_strtol(tmpbuf, &s, 0)
Fix a bug of isspace() checking after parsing
Signed-off-by: Kinglong Mee <kinglongmee@xxxxxxxxx>
---
net/sunrpc/sysctl.c | 23 ++++++++++++-----------
1 file changed, 12 insertions(+), 11 deletions(-)
diff --git a/net/sunrpc/sysctl.c b/net/sunrpc/sysctl.c
index 887f018..c88d9bc 100644
--- a/net/sunrpc/sysctl.c
+++ b/net/sunrpc/sysctl.c
@@ -76,7 +76,7 @@ static int
proc_dodebug(struct ctl_table *table, int write,
void __user *buffer, size_t *lenp, loff_t *ppos)
{
- char tmpbuf[20], c, *s;
+ char tmpbuf[20], c, *s = NULL;
char __user *p;
unsigned int value;
size_t left, len;
@@ -103,23 +103,24 @@ proc_dodebug(struct ctl_table *table, int write,
return -EFAULT;
tmpbuf[left] = '\0';
- for (s = tmpbuf, value = 0; '0' <= *s && *s <= '9'; s++, left--)
- value = 10 * value + (*s - '0');
- if (*s && !isspace(*s))
- return -EINVAL;
- while (left && isspace(*s))
- left--, s++;
+ value = simple_strtol(tmpbuf, &s, 0);
+ if (s) {
+ left -= (s - tmpbuf);
+ if (left && !isspace(*s))
+ return -EINVAL;
+ while (left && isspace(*s))
+ left--, s++;
+ } else
+ left = 0;
*(unsigned int *) table->data = value;
/* Display the RPC tasks on writing to rpc_debug */
if (strcmp(table->procname, "rpc_debug") == 0)
rpc_show_tasks(&init_net);
} else {
- if (!access_ok(VERIFY_WRITE, buffer, left))
- return -EFAULT;
- len = sprintf(tmpbuf, "%d", *(unsigned int *) table->data);
+ len = sprintf(tmpbuf, "0x%04x", *(unsigned int *) table->data);
if (len > left)
len = left;
- if (__copy_to_user(buffer, tmpbuf, len))
+ if (copy_to_user(buffer, tmpbuf, len))
return -EFAULT;
if ((left -= len) > 0) {
if (put_user('\n', (char __user *)buffer + len))
--
2.5.0
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