lk/linux-kernel-test
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Merge branch 'next' into for-linus

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This commit is contained in:
James Morris
2010-03-01 09:36:31 +11:00
parent 30ff056c42 ef57471a73
commit b4ccebdd37
30 changed files with 2037 additions and 1715 deletions
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52
kernel/printk.c
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@@ -35,6 +35,7 @@
#include <linux/kexec.h>
#include <linux/ratelimit.h>
#include <linux/kmsg_dump.h>
#include <linux/syslog.h>
#include <asm/uaccess.h>
@@ -258,38 +259,23 @@ static inline void boot_delay_msec(void)
}
#endif
/*
* Commands to do_syslog:
*
* 0 -- Close the log. Currently a NOP.
* 1 -- Open the log. Currently a NOP.
* 2 -- Read from the log.
* 3 -- Read all messages remaining in the ring buffer.
* 4 -- Read and clear all messages remaining in the ring buffer
* 5 -- Clear ring buffer.
* 6 -- Disable printk's to console
* 7 -- Enable printk's to console
* 8 -- Set level of messages printed to console
* 9 -- Return number of unread characters in the log buffer
* 10 -- Return size of the log buffer
*/
int do_syslog(int type, char __user *buf, int len)
int do_syslog(int type, char __user *buf, int len, bool from_file)
{
unsigned i, j, limit, count;
int do_clear = 0;
char c;
int error = 0;
error = security_syslog(type);
error = security_syslog(type, from_file);
if (error)
return error;
switch (type) {
case 0: /* Close log */
case SYSLOG_ACTION_CLOSE: /* Close log */
break;
case 1: /* Open log */
case SYSLOG_ACTION_OPEN: /* Open log */
break;
case 2: /* Read from log */
case SYSLOG_ACTION_READ: /* Read from log */
error = -EINVAL;
if (!buf || len < 0)
goto out;
@@ -320,10 +306,12 @@ int do_syslog(int type, char __user *buf, int len)
if (!error)
error = i;
break;
case 4: /* Read/clear last kernel messages */
/* Read/clear last kernel messages */
case SYSLOG_ACTION_READ_CLEAR:
do_clear = 1;
/* FALL THRU */
case 3: /* Read last kernel messages */
/* Read last kernel messages */
case SYSLOG_ACTION_READ_ALL:
error = -EINVAL;
if (!buf || len < 0)
goto out;
@@ -376,21 +364,25 @@ int do_syslog(int type, char __user *buf, int len)
}
}
break;
case 5: /* Clear ring buffer */
/* Clear ring buffer */
case SYSLOG_ACTION_CLEAR:
logged_chars = 0;
break;
case 6: /* Disable logging to console */
/* Disable logging to console */
case SYSLOG_ACTION_CONSOLE_OFF:
if (saved_console_loglevel == -1)
saved_console_loglevel = console_loglevel;
console_loglevel = minimum_console_loglevel;
break;
case 7: /* Enable logging to console */
/* Enable logging to console */
case SYSLOG_ACTION_CONSOLE_ON:
if (saved_console_loglevel != -1) {
console_loglevel = saved_console_loglevel;
saved_console_loglevel = -1;
}
break;
case 8: /* Set level of messages printed to console */
/* Set level of messages printed to console */
case SYSLOG_ACTION_CONSOLE_LEVEL:
error = -EINVAL;
if (len < 1 || len > 8)
goto out;
@@ -401,10 +393,12 @@ int do_syslog(int type, char __user *buf, int len)
saved_console_loglevel = -1;
error = 0;
break;
case 9: /* Number of chars in the log buffer */
/* Number of chars in the log buffer */
case SYSLOG_ACTION_SIZE_UNREAD:
error = log_end - log_start;
break;
case 10: /* Size of the log buffer */
/* Size of the log buffer */
case SYSLOG_ACTION_SIZE_BUFFER:
error = log_buf_len;
break;
default:
@@ -417,7 +411,7 @@ out:
SYSCALL_DEFINE3(syslog, int, type, char __user *, buf, int, len)
{
return do_syslog(type, buf, len);
return do_syslog(type, buf, len, SYSLOG_FROM_CALL);
}
/*