From 941c3ff3102ccce440034d59cf9e4e9cc10b720d Mon Sep 17 00:00:00 2001 From: Kinglong Mee Date: Sat, 12 Sep 2015 09:37:18 +0800 Subject: 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 Signed-off-by: Trond Myklebust --- net/sunrpc/sysctl.c | 23 ++++++++++++----------- 1 file changed, 12 insertions(+), 11 deletions(-) (limited to 'net') diff --git a/net/sunrpc/sysctl.c b/net/sunrpc/sysctl.c index 887f0183b4c6..c88d9bc06f5c 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)) -- cgit v1.2.3