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bdev: Simplify spdk_bdev_get_io_buf

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This was implemented as two functions, but it
is much simpler as one. Also, the public function
was way at the bottom of the file instead of near
spdk_bdev_put_io_buf.

Change-Id: I3a90688910b0542cc77b6333bab15132cf514eeb
Signed-off-by: Ben Walker <benjamin.walker@intel.com>
This commit is contained in:
Ben Walker 2017-05-09 14:32:49 -07:00
parent 812ffaf1a3
commit 58afa58a00
1 changed files with 36 additions and 40 deletions
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76
lib/bdev/bdev.c
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@ -40,6 +40,7 @@
#include <rte_lcore.h>
#include "spdk/env.h"
#include "spdk/io_channel.h"
#include "spdk/likely.h"
#include "spdk/queue.h"
#include "spdk/nvme_spec.h"
#include "spdk/scsi_spec.h"
@ -167,6 +168,41 @@ spdk_bdev_io_put_buf(struct spdk_bdev_io *bdev_io)
}
}
void
spdk_bdev_io_get_buf(struct spdk_bdev_io *bdev_io, spdk_bdev_io_get_buf_cb cb)
{
uint64_t len = bdev_io->u.read.len;
struct spdk_mempool *pool;
need_buf_tailq_t *tailq;
void *buf = NULL;
assert(cb != NULL);
assert(bdev_io->u.read.iovs != NULL);
if (spdk_unlikely(bdev_io->u.read.iovs[0].iov_base != NULL)) {
/* Buffer already present */
cb(bdev_io->ch->channel, bdev_io);
return;
}
bdev_io->get_buf_cb = cb;
if (len <= SPDK_BDEV_SMALL_BUF_MAX_SIZE) {
pool = g_bdev_mgr.buf_small_pool;
tailq = &g_bdev_mgr.need_buf_small[rte_lcore_id()];
} else {
pool = g_bdev_mgr.buf_large_pool;
tailq = &g_bdev_mgr.need_buf_large[rte_lcore_id()];
}
buf = spdk_mempool_get(pool);
if (!buf) {
TAILQ_INSERT_TAIL(tailq, bdev_io, buf_link);
} else {
spdk_bdev_io_set_buf(bdev_io, buf);
}
}
static int
spdk_bdev_module_get_max_ctx_size(void)
{
@ -346,32 +382,6 @@ spdk_bdev_put_io(struct spdk_bdev_io *bdev_io)
spdk_mempool_put(g_bdev_mgr.bdev_io_pool, (void *)bdev_io);
}
static void
_spdk_bdev_io_get_buf(struct spdk_bdev_io *bdev_io)
{
uint64_t len = bdev_io->u.read.len;
struct spdk_mempool *pool;
need_buf_tailq_t *tailq;
void *buf = NULL;
if (len <= SPDK_BDEV_SMALL_BUF_MAX_SIZE) {
pool = g_bdev_mgr.buf_small_pool;
tailq = &g_bdev_mgr.need_buf_small[rte_lcore_id()];
} else {
pool = g_bdev_mgr.buf_large_pool;
tailq = &g_bdev_mgr.need_buf_large[rte_lcore_id()];
}
buf = spdk_mempool_get(pool);
if (!buf) {
TAILQ_INSERT_TAIL(tailq, bdev_io, buf_link);
} else {
spdk_bdev_io_set_buf(bdev_io, buf);
}
}
static void
spdk_bdev_cleanup_pending_buf_io(struct spdk_bdev *bdev)
{
@ -1076,20 +1086,6 @@ spdk_bdev_unclaim(struct spdk_bdev *bdev)
}
}
void
spdk_bdev_io_get_buf(struct spdk_bdev_io *bdev_io, spdk_bdev_io_get_buf_cb cb)
{
assert(cb != NULL);
assert(bdev_io->u.read.iovs != NULL);
if (bdev_io->u.read.iovs[0].iov_base == NULL) {
bdev_io->get_buf_cb = cb;
_spdk_bdev_io_get_buf(bdev_io);
} else {
cb(bdev_io->ch->channel, bdev_io);
}
}
void
spdk_bdev_io_get_iovec(struct spdk_bdev_io *bdev_io, struct iovec **iovp, int *iovcntp)
{