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| author | Allan Stephens <allan.stephens@windriver.com> | 2008-05-05 01:20:42 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-05-05 01:20:42 -0700 |
| commit | fb98ec71c7f81b6db9b793aeb9d53823b6960d8b (patch) | |
| tree | ef526b18473b2772d9d9142ef41e7061b2e1cf0c /net/tipc/dbg.c | |
| parent | 025adbe8e58290798001b472aec3eb618d8fc930 (diff) | |
| download | lwn-fb98ec71c7f81b6db9b793aeb9d53823b6960d8b.tar.gz lwn-fb98ec71c7f81b6db9b793aeb9d53823b6960d8b.zip | |
tipc: Provide feedback when log buffer resizing fails
This patch provides feedback to the user when TIPC is unable
to set its log buffer to the requested size.
Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/tipc/dbg.c')
| -rw-r--r-- | net/tipc/dbg.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/net/tipc/dbg.c b/net/tipc/dbg.c index 1a8d0a24d9e3..c6806910598c 100644 --- a/net/tipc/dbg.c +++ b/net/tipc/dbg.c @@ -2,7 +2,7 @@ * net/tipc/dbg.c: TIPC print buffer routines for debugging * * Copyright (c) 1996-2006, Ericsson AB - * Copyright (c) 2005-2006, Wind River Systems + * Copyright (c) 2005-2007, Wind River Systems * All rights reserved. * * Redistribution and use in source and binary forms, with or without @@ -354,8 +354,10 @@ void tipc_dump(struct print_buf *pb, const char *fmt, ...) * @log_size: print buffer size to use */ -void tipc_log_resize(int log_size) +int tipc_log_resize(int log_size) { + int res = 0; + spin_lock_bh(&print_lock); if (TIPC_LOG->buf) { kfree(TIPC_LOG->buf); @@ -366,8 +368,11 @@ void tipc_log_resize(int log_size) log_size = TIPC_PB_MIN_SIZE; tipc_printbuf_init(TIPC_LOG, kmalloc(log_size, GFP_ATOMIC), log_size); + res = !TIPC_LOG->buf; } spin_unlock_bh(&print_lock); + + return res; } /** @@ -385,7 +390,9 @@ struct sk_buff *tipc_log_resize_cmd(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_resize(value); + if (tipc_log_resize(value)) + return tipc_cfg_reply_error_string( + "unable to create specified log (log size is now 0)"); return tipc_cfg_reply_none(); } |