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Fix off-by-1 truncation of hw_serial when converting from integer to string, when writing to /proc/sys/kernel/spl/spl_hostid. 

Fixes hostid mismatch which leads to assertion failure when the hostid/hw_serial is a 10-character decimal number:

$ zpool status
  pool: lustre
 state: ONLINE
lt-zpool: zpool_main.c:3176: status_callback: Assertion `reason == ZPOOL_STATUS_OK' failed.
zsh: 5262 abort      zpool status
This commit is contained in:
Ricardo M. Correia 2009-03-12 21:23:34 +00:00 committed by Brian Behlendorf
parent 6c33eb8162
commit a0b5ae8aca
1 changed files with 10 additions and 9 deletions
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5
module/spl/spl-proc.c
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@ -471,9 +471,10 @@ proc_dohostid(struct ctl_table *table, int write, struct file *filp,
if (str == end)
RETURN(-EINVAL);
spl_hostid = (long)val;
(void)snprintf(hw_serial, HW_HOSTID_LEN-1, "%u",
spl_hostid = (long) val;
(void) snprintf(hw_serial, HW_HOSTID_LEN, "%u",
(val >= 0) ? val : -val);
hw_serial[HW_HOSTID_LEN - 1] = '\0';
*ppos += *lenp;
} else {
len = snprintf(str, sizeof(str), "%lx", spl_hostid);