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Clean up use of ng_hdhasb_mtx a little:

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- Assert the mutex in NG_IDHASH_FIND() since the mutex is required to
  safely walk the node lists in the ng_ID_hash table.

- Acquire the ng_nodelist_mtx when walking ng_allnodes or ng_allhooks
  to generate state dump output from the netgraph sysctls.
This commit is contained in:
Robert Watson 2004-06-24 01:47:31 +00:00
parent ad6b0efff5
commit 53f9c5e988
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=131008
1 changed files with 5 additions and 0 deletions
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5
sys/netgraph/ng_base.c
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@ -170,6 +170,7 @@ static struct mtx ng_idhash_mtx;
#define NG_IDHASH_FN(ID) ((ID) % (NG_ID_HASH_SIZE))
#define NG_IDHASH_FIND(ID, node) \
do { \
mtx_assert(&ng_idhash_mtx, MA_OWNED); \
LIST_FOREACH(node, &ng_ID_hash[NG_IDHASH_FN(ID)], \
nd_idnodes) { \
if (NG_NODE_IS_VALID(node) \
@ -3231,10 +3232,12 @@ ng_dumpnodes(void)
{
node_p node;
int i = 1;
mtx_lock(&ng_nodelist_mtx);
SLIST_FOREACH(node, &ng_allnodes, nd_all) {
printf("[%d] ", i++);
dumpnode(node, NULL, 0);
}
mtx_unlock(&ng_nodelist_mtx);
}
static void
@ -3242,10 +3245,12 @@ ng_dumphooks(void)
{
hook_p hook;
int i = 1;
mtx_lock(&ng_nodelist_mtx);
SLIST_FOREACH(hook, &ng_allhooks, hk_all) {
printf("[%d] ", i++);
dumphook(hook, NULL, 0);
}
mtx_unlock(&ng_nodelist_mtx);
}
static int