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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/os/linux/zfs/zpl_xattr.c
+6 -4
View File
@@ -153,19 +153,20 @@ static int
zpl_xattr_readdir(struct inode *dxip, xattr_filldir_t *xf)
{
zap_cursor_t zc;
zap_attribute_t zap;
zap_attribute_t *zap = zap_attribute_alloc();
int error;
zap_cursor_init(&zc, ITOZSB(dxip)->z_os, ITOZ(dxip)->z_id);
while ((error = -zap_cursor_retrieve(&zc, &zap)) == 0) {
while ((error = -zap_cursor_retrieve(&zc, zap)) == 0) {
if (zap.za_integer_length != 8 || zap.za_num_integers != 1) {
if (zap->za_integer_length != 8 || zap->za_num_integers != 1) {
error = -ENXIO;
break;
}
error = zpl_xattr_filldir(xf, zap.za_name, strlen(zap.za_name));
error = zpl_xattr_filldir(xf, zap->za_name,
strlen(zap->za_name));
if (error)
break;
@@ -173,6 +174,7 @@ zpl_xattr_readdir(struct inode *dxip, xattr_filldir_t *xf)
}
zap_cursor_fini(&zc);
zap_attribute_free(zap);
if (error == -ENOENT)
error = 0;