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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/zfeature.c
+2 -2
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@@ -183,7 +183,7 @@ spa_features_check(spa_t *spa, boolean_t for_write,
char *buf;
zc = kmem_alloc(sizeof (zap_cursor_t), KM_SLEEP);
za = kmem_alloc(sizeof (zap_attribute_t), KM_SLEEP);
za = zap_attribute_alloc();
buf = kmem_alloc(MAXPATHLEN, KM_SLEEP);
supported = B_TRUE;
@@ -217,7 +217,7 @@ spa_features_check(spa_t *spa, boolean_t for_write,
zap_cursor_fini(zc);
kmem_free(buf, MAXPATHLEN);
kmem_free(za, sizeof (zap_attribute_t));
zap_attribute_free(za);
kmem_free(zc, sizeof (zap_cursor_t));
return (supported);