Fix computation of SKB size for quota messages
Fix computation of size of skb needed for quota message. We should use
netlink provided functions and not just an ad-hoc number. Also don't print
the return value from nla_put_foo() as it is always -1.
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/fs/dquot.c b/fs/dquot.c
index 686ab63..b2592ab 100644
--- a/fs/dquot.c
+++ b/fs/dquot.c
@@ -895,9 +895,6 @@
#ifdef CONFIG_QUOTA_NETLINK_INTERFACE
-/* Size of quota netlink message - actually an upperbound for buffer size */
-#define QUOTA_NL_MSG_SIZE 32
-
/* Netlink family structure for quota */
static struct genl_family quota_genl_family = {
.id = GENL_ID_GENERATE,
@@ -914,11 +911,13 @@
struct sk_buff *skb;
void *msg_head;
int ret;
+ int msg_size = 4 * nla_total_size(sizeof(u32)) +
+ 2 * nla_total_size(sizeof(u64));
/* We have to allocate using GFP_NOFS as we are called from a
* filesystem performing write and thus further recursion into
* the fs to free some data could cause deadlocks. */
- skb = genlmsg_new(QUOTA_NL_MSG_SIZE, GFP_NOFS);
+ skb = genlmsg_new(msg_size, GFP_NOFS);
if (!skb) {
printk(KERN_ERR
"VFS: Not enough memory to send quota warning.\n");
@@ -959,7 +958,7 @@
"VFS: Failed to send notification message: %d\n", ret);
return;
attr_err_out:
- printk(KERN_ERR "VFS: Failed to compose quota message: %d\n", ret);
+ printk(KERN_ERR "VFS: Not enough space to compose quota message!\n");
err_out:
kfree_skb(skb);
}
