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bdev/compress: Refactor _compress_operation() about mbuf allocation

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Factor out setup source and destination mbufs operation from
_comppress_operation() into a helper function _setup_compress_mbufs().

Setup source mbufs and setup destination mbufs are identical except
for total_length, and so this refactorinng is possible.

This refactoring will improve readability and clarify the logic
a little.

Signed-off-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Change-Id: Ia0a230c2d5e74aec917580aae969b49266178191
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/1683
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Community-CI: Broadcom CI
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Paul Luse <paul.e.luse@intel.com>
This commit is contained in:
Shuhei Matsumoto 2020-04-06 10:03:27 +09:00 committed by Tomasz Zawadzki
parent 1328697b50
commit e65e798b34
1 changed files with 75 additions and 96 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

171
module/bdev/compress/vbdev_compress.c
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@ -437,6 +437,72 @@ spdk_reduce_rw_blocks_cb(void *arg, int reduce_errno)
}
}
static uint64_t
_setup_compress_mbuf(struct rte_mbuf **mbufs, int *mbuf_total, uint64_t *total_length,
struct iovec *iovs, int iovcnt, void *reduce_cb_arg)
{
uint64_t updated_length, remainder, phys_addr;
uint8_t *current_base = NULL;
int iov_index, mbuf_index;
int rc = 0;
/* Setup mbufs */
iov_index = mbuf_index = 0;
while (iov_index < iovcnt) {
current_base = iovs[iov_index].iov_base;
if (total_length) {
*total_length += iovs[iov_index].iov_len;
}
assert(mbufs[mbuf_index] != NULL);
mbufs[mbuf_index]->userdata = reduce_cb_arg;
updated_length = iovs[iov_index].iov_len;
phys_addr = spdk_vtophys((void *)current_base, &updated_length);
rte_pktmbuf_attach_extbuf(mbufs[mbuf_index],
current_base,
phys_addr,
updated_length,
&g_shinfo);
rte_pktmbuf_append(mbufs[mbuf_index], updated_length);
remainder = iovs[iov_index].iov_len - updated_length;
if (mbuf_index > 0) {
rte_pktmbuf_chain(mbufs[0], mbufs[mbuf_index]);
}
/* If we crossed 2 2MB boundary we need another mbuf for the remainder */
if (remainder > 0) {
/* allocate an mbuf at the end of the array */
rc = rte_pktmbuf_alloc_bulk(g_mbuf_mp,
(struct rte_mbuf **)&mbufs[*mbuf_total], 1);
if (rc) {
SPDK_ERRLOG("ERROR trying to get an extra mbuf!\n");
return -1;
}
(*mbuf_total)++;
mbuf_index++;
mbufs[mbuf_index]->userdata = reduce_cb_arg;
current_base += updated_length;
phys_addr = spdk_vtophys((void *)current_base, &remainder);
/* assert we don't cross another */
assert(remainder == iovs[iov_index].iov_len - updated_length);
rte_pktmbuf_attach_extbuf(mbufs[mbuf_index],
current_base,
phys_addr,
remainder,
&g_shinfo);
rte_pktmbuf_append(mbufs[mbuf_index], remainder);
rte_pktmbuf_chain(mbufs[0], mbufs[mbuf_index]);
}
iov_index++;
mbuf_index++;
}
return 0;
}
static int
_compress_operation(struct spdk_reduce_backing_dev *backing_dev, struct iovec *src_iovs,
int src_iovcnt, struct iovec *dst_iovs,
@ -449,10 +515,7 @@ _compress_operation(struct spdk_reduce_backing_dev *backing_dev, struct iovec *s
struct rte_mbuf *src_mbufs[MAX_MBUFS_PER_OP];
struct rte_mbuf *dst_mbufs[MAX_MBUFS_PER_OP];
uint8_t cdev_id = comp_bdev->device_qp->device->cdev_id;
uint64_t updated_length, remainder, phys_addr, total_length = 0;
uint8_t *current_src_base = NULL;
uint8_t *current_dst_base = NULL;
int iov_index, mbuf_index;
uint64_t total_length = 0;
int rc = 0;
struct vbdev_comp_op *op_to_queue;
int i;
@ -491,55 +554,10 @@ _compress_operation(struct spdk_reduce_backing_dev *backing_dev, struct iovec *s
* and associate with our single comp_op.
*/
/* Setup src mbufs */
iov_index = mbuf_index = 0;
while (iov_index < src_iovcnt) {
current_src_base = src_iovs[iov_index].iov_base;
total_length += src_iovs[iov_index].iov_len;
assert(src_mbufs[mbuf_index] != NULL);
src_mbufs[mbuf_index]->userdata = reduce_cb_arg;
updated_length = src_iovs[iov_index].iov_len;
phys_addr = spdk_vtophys((void *)current_src_base, &updated_length);
rte_pktmbuf_attach_extbuf(src_mbufs[mbuf_index],
current_src_base,
phys_addr,
updated_length,
&g_shinfo);
rte_pktmbuf_append(src_mbufs[mbuf_index], updated_length);
remainder = src_iovs[iov_index].iov_len - updated_length;
if (mbuf_index > 0) {
rte_pktmbuf_chain(src_mbufs[0], src_mbufs[mbuf_index]);
}
/* If we crossed 2 2MB boundary we need another mbuf for the remainder */
if (remainder > 0) {
/* allocate an mbuf at the end of the array */
rc = rte_pktmbuf_alloc_bulk(g_mbuf_mp, (struct rte_mbuf **)&src_mbufs[src_mbuf_total], 1);
if (rc) {
SPDK_ERRLOG("ERROR trying to get an extra src_mbuf!\n");
goto error_src_dst;
}
src_mbuf_total++;
mbuf_index++;
src_mbufs[mbuf_index]->userdata = reduce_cb_arg;
current_src_base += updated_length;
phys_addr = spdk_vtophys((void *)current_src_base, &remainder);
/* assert we don't cross another */
assert(remainder == src_iovs[iov_index].iov_len - updated_length);
rte_pktmbuf_attach_extbuf(src_mbufs[mbuf_index],
current_src_base,
phys_addr,
remainder,
&g_shinfo);
rte_pktmbuf_append(src_mbufs[mbuf_index], remainder);
rte_pktmbuf_chain(src_mbufs[0], src_mbufs[mbuf_index]);
}
iov_index++;
mbuf_index++;
rc = _setup_compress_mbuf(&src_mbufs[0], &src_mbuf_total, &total_length,
src_iovs, src_iovcnt, reduce_cb_arg);
if (rc < 0) {
goto error_src_dst;
}
comp_op->m_src = src_mbufs[0];
@ -547,49 +565,10 @@ _compress_operation(struct spdk_reduce_backing_dev *backing_dev, struct iovec *s
comp_op->src.length = total_length;
/* setup dst mbufs, for the current test being used with this code there's only one vector */
iov_index = mbuf_index = 0;
while (iov_index < dst_iovcnt) {
current_dst_base = dst_iovs[iov_index].iov_base;
updated_length = dst_iovs[iov_index].iov_len;
phys_addr = spdk_vtophys((void *)current_dst_base, &updated_length);
rte_pktmbuf_attach_extbuf(dst_mbufs[mbuf_index],
current_dst_base,
phys_addr,
updated_length,
&g_shinfo);
rte_pktmbuf_append(dst_mbufs[mbuf_index], updated_length);
remainder = dst_iovs[iov_index].iov_len - updated_length;
if (mbuf_index > 0) {
rte_pktmbuf_chain(dst_mbufs[0], dst_mbufs[mbuf_index]);
}
/* If we crossed 2 2MB boundary we need another mbuf for the remainder */
if (remainder > 0) {
rc = rte_pktmbuf_alloc_bulk(g_mbuf_mp, (struct rte_mbuf **)&dst_mbufs[dst_mbuf_total], 1);
if (rc) {
SPDK_ERRLOG("ERROR trying to get an extra dst_mbuf!\n");
goto error_src_dst;
}
dst_mbuf_total++;
mbuf_index++;
current_dst_base += updated_length;
phys_addr = spdk_vtophys((void *)current_dst_base, &remainder);
/* assert we don't cross another */
assert(remainder == dst_iovs[iov_index].iov_len - updated_length);
rte_pktmbuf_attach_extbuf(dst_mbufs[mbuf_index],
current_dst_base,
phys_addr,
remainder,
&g_shinfo);
rte_pktmbuf_append(dst_mbufs[mbuf_index], remainder);
rte_pktmbuf_chain(dst_mbufs[0], dst_mbufs[mbuf_index]);
}
iov_index++;
mbuf_index++;
rc = _setup_compress_mbuf(&dst_mbufs[0], &dst_mbuf_total, NULL,
dst_iovs, dst_iovcnt, reduce_cb_arg);
if (rc < 0) {
goto error_src_dst;
}
comp_op->m_dst = dst_mbufs[0];