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target: simplify XCOPY wwn->se_dev lookup helper 

target_xcopy_locate_se_dev_e4() is used to locate an se_dev, based on
the WWN provided with the XCOPY request. Remove a couple of unneeded
arguments, and rely on the caller for the src/dst test.

Signed-off-by: David Disseldorp <ddiss@suse.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
This commit is contained in:
David Disseldorp 2017-01-02 18:04:05 +01:00 committed by Bart Van Assche
parent c243849720
commit 94aae4caac
1 changed files with 9 additions and 19 deletions
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28
drivers/target/target_core_xcopy.c
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@ -53,18 +53,13 @@ static int target_xcopy_gen_naa_ieee(struct se_device *dev, unsigned char *buf)
return 0;
}
static int target_xcopy_locate_se_dev_e4(struct se_cmd *se_cmd, struct xcopy_op *xop,
bool src)
static int target_xcopy_locate_se_dev_e4(const unsigned char *dev_wwn,
struct se_device **found_dev)
{
struct se_device *se_dev;
unsigned char tmp_dev_wwn[XCOPY_NAA_IEEE_REGEX_LEN], *dev_wwn;
unsigned char tmp_dev_wwn[XCOPY_NAA_IEEE_REGEX_LEN];
int rc;
if (src)
dev_wwn = &xop->dst_tid_wwn[0];
else
dev_wwn = &xop->src_tid_wwn[0];
mutex_lock(&g_device_mutex);
list_for_each_entry(se_dev, &g_device_list, g_dev_node) {
@ -78,15 +73,8 @@ static int target_xcopy_locate_se_dev_e4(struct se_cmd *se_cmd, struct xcopy_op
if (rc != 0)
continue;
if (src) {
xop->dst_dev = se_dev;
pr_debug("XCOPY 0xe4: Setting xop->dst_dev: %p from located"
" se_dev\n", xop->dst_dev);
} else {
xop->src_dev = se_dev;
pr_debug("XCOPY 0xe4: Setting xop->src_dev: %p from located"
" se_dev\n", xop->src_dev);
}
*found_dev = se_dev;
pr_debug("XCOPY 0xe4: located se_dev: %p\n", se_dev);
rc = target_depend_item(&se_dev->dev_group.cg_item);
if (rc != 0) {
@ -247,9 +235,11 @@ static int target_xcopy_parse_target_descriptors(struct se_cmd *se_cmd,
}
if (xop->op_origin == XCOL_SOURCE_RECV_OP)
rc = target_xcopy_locate_se_dev_e4(se_cmd, xop, true);
rc = target_xcopy_locate_se_dev_e4(xop->dst_tid_wwn,
&xop->dst_dev);
else
rc = target_xcopy_locate_se_dev_e4(se_cmd, xop, false);
rc = target_xcopy_locate_se_dev_e4(xop->src_tid_wwn,
&xop->src_dev);
/*
* If a matching IEEE NAA 0x83 descriptor for the requested device
* is not located on this node, return COPY_ABORTED with ASQ/ASQC