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Allocate zap_attribute_t from kmem instead of stack

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This patch is preparatory work for long name feature. It changes all
users of zap_attribute_t to allocate it from kmem instead of stack. It
also make zap_attribute_t and zap_name_t structure variable length.

Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Signed-off-by: Chunwei Chen <david.chen@nutanix.com>
Closes #15921
This commit is contained in:
Sanjeev Bagewadi
2021-02-02 13:54:15 +00:00
committed by Brian Behlendorf
parent 141368a4b6
commit 3cf2bfa570
35 changed files with 513 additions and 365 deletions
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module/zfs/dsl_pool.c
+7 -5
View File
@@ -1196,7 +1196,7 @@ dsl_pool_unlinked_drain_taskq(dsl_pool_t *dp)
void
dsl_pool_clean_tmp_userrefs(dsl_pool_t *dp)
{
zap_attribute_t za;
zap_attribute_t *za;
zap_cursor_t zc;
objset_t *mos = dp->dp_meta_objset;
uint64_t zapobj = dp->dp_tmp_userrefs_obj;
@@ -1208,19 +1208,20 @@ dsl_pool_clean_tmp_userrefs(dsl_pool_t *dp)
holds = fnvlist_alloc();
za = zap_attribute_alloc();
for (zap_cursor_init(&zc, mos, zapobj);
zap_cursor_retrieve(&zc, &za) == 0;
zap_cursor_retrieve(&zc, za) == 0;
zap_cursor_advance(&zc)) {
char *htag;
nvlist_t *tags;
htag = strchr(za.za_name, '-');
htag = strchr(za->za_name, '-');
*htag = '\0';
++htag;
if (nvlist_lookup_nvlist(holds, za.za_name, &tags) != 0) {
if (nvlist_lookup_nvlist(holds, za->za_name, &tags) != 0) {
tags = fnvlist_alloc();
fnvlist_add_boolean(tags, htag);
fnvlist_add_nvlist(holds, za.za_name, tags);
fnvlist_add_nvlist(holds, za->za_name, tags);
fnvlist_free(tags);
} else {
fnvlist_add_boolean(tags, htag);
@@ -1229,6 +1230,7 @@ dsl_pool_clean_tmp_userrefs(dsl_pool_t *dp)
dsl_dataset_user_release_tmp(dp, holds);
fnvlist_free(holds);
zap_cursor_fini(&zc);
zap_attribute_free(za);
}
/*