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Sunrpc: Supports hexadecimal number for sysctl files of sunrpc debug 

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@gmail.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
This commit is contained in:
Kinglong Mee 2015-09-12 09:37:18 +08:00 committed by Trond Myklebust
parent 1ca843a2d2
commit 941c3ff310
1 changed files with 12 additions and 11 deletions
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23
net/sunrpc/sysctl.c
View File

@ -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))