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tipc: Simplify log buffer resizing 

This patch simplifies & standardizes the way TIPC's print buffer
log is resized.  Code to terminate use of the log buffer is
eliminated by simply setting the log buffer size to 0 bytes.

Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Allan Stephens 2008-05-05 01:20:04 -07:00 committed by David S. Miller
parent f74d505b58
commit 025adbe8e5
4 changed files with 18 additions and 30 deletions
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2
net/tipc/config.c
View File

@ -529,7 +529,7 @@ struct sk_buff *tipc_cfg_do_cmd(u32 orig_node, u16 cmd, const void *request_area
break;
#endif
case TIPC_CMD_SET_LOG_SIZE:
rep_tlv_buf = tipc_log_resize(req_tlv_area, req_tlv_space);
rep_tlv_buf = tipc_log_resize_cmd(req_tlv_area, req_tlv_space);
break;
case TIPC_CMD_DUMP_LOG:
rep_tlv_buf = tipc_log_dump();

4
net/tipc/core.c
View File

@ -182,7 +182,7 @@ static int __init tipc_init(void)
{
int res;
tipc_log_reinit(CONFIG_TIPC_LOG);
tipc_log_resize(CONFIG_TIPC_LOG);
info("Activated (version " TIPC_MOD_VER
" compiled " __DATE__ " " __TIME__ ")\n");
@ -209,7 +209,7 @@ static void __exit tipc_exit(void)
tipc_core_stop_net();
tipc_core_stop();
info("Deactivated\n");
tipc_log_stop();
tipc_log_resize(0);
}
module_init(tipc_init);

36
net/tipc/dbg.c
View File

@ -350,43 +350,31 @@ void tipc_dump(struct print_buf *pb, const char *fmt, ...)
}
/**
* tipc_log_stop - free up TIPC log print buffer
* tipc_log_resize - change the size of the TIPC log buffer
* @log_size: print buffer size to use
*/
void tipc_log_stop(void)
void tipc_log_resize(int log_size)
{
spin_lock_bh(&print_lock);
if (TIPC_LOG->buf) {
kfree(TIPC_LOG->buf);
TIPC_LOG->buf = NULL;
}
if (log_size) {
if (log_size < TIPC_PB_MIN_SIZE)
log_size = TIPC_PB_MIN_SIZE;
tipc_printbuf_init(TIPC_LOG, kmalloc(log_size, GFP_ATOMIC),
log_size);
}
spin_unlock_bh(&print_lock);
}
/**
* tipc_log_reinit - (re)initialize TIPC log print buffer
* @log_size: print buffer size to use
* tipc_log_resize_cmd - reconfigure size of TIPC log buffer
*/
void tipc_log_reinit(int log_size)
{
tipc_log_stop();
if (log_size) {
if (log_size < TIPC_PB_MIN_SIZE)
log_size = TIPC_PB_MIN_SIZE;
spin_lock_bh(&print_lock);
tipc_printbuf_init(TIPC_LOG, kmalloc(log_size, GFP_ATOMIC),
log_size);
spin_unlock_bh(&print_lock);
}
}
/**
* tipc_log_resize - reconfigure size of TIPC log buffer
*/
struct sk_buff *tipc_log_resize(const void *req_tlv_area, int req_tlv_space)
struct sk_buff *tipc_log_resize_cmd(const void *req_tlv_area, int req_tlv_space)
{
u32 value;
@ -397,7 +385,7 @@ struct sk_buff *tipc_log_resize(const void *req_tlv_area, int req_tlv_space)
if (value != delimit(value, 0, 32768))
return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE
" (log size must be 0-32768)");
tipc_log_reinit(value);
tipc_log_resize(value);
return tipc_cfg_reply_none();
}

6
net/tipc/dbg.h
View File

@ -61,10 +61,10 @@ int tipc_printbuf_empty(struct print_buf *pb);
int tipc_printbuf_validate(struct print_buf *pb);
void tipc_printbuf_move(struct print_buf *pb_to, struct print_buf *pb_from);
void tipc_log_reinit(int log_size);
void tipc_log_stop(void);
void tipc_log_resize(int log_size);
struct sk_buff *tipc_log_resize(const void *req_tlv_area, int req_tlv_space);
struct sk_buff *tipc_log_resize_cmd(const void *req_tlv_area,
int req_tlv_space);
struct sk_buff *tipc_log_dump(void);
#endif