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-rw-r--r--hw/block/Makefile.objs6
-rw-r--r--hw/block/dataplane/virtio-blk.c1
-rw-r--r--hw/block/m25p80.c1
-rw-r--r--hw/block/nvme.c1
-rw-r--r--hw/block/nvme.h1
-rw-r--r--hw/block/onenand.c2
-rw-r--r--hw/block/pflash_cfi01.c1
-rw-r--r--hw/block/pflash_cfi02.c1
-rw-r--r--hw/block/virtio-blk.c1
-rw-r--r--hw/block/xen_disk.c614
10 files changed, 105 insertions, 524 deletions
diff --git a/hw/block/Makefile.objs b/hw/block/Makefile.objs
index 4c19a58..53ce575 100644
--- a/hw/block/Makefile.objs
+++ b/hw/block/Makefile.objs
@@ -11,8 +11,6 @@ common-obj-$(CONFIG_NVME_PCI) += nvme.o
obj-$(CONFIG_SH4) += tc58128.o
-obj-$(CONFIG_VIRTIO) += virtio-blk.o
-obj-$(CONFIG_VIRTIO) += dataplane/
-ifeq ($(CONFIG_VIRTIO),y)
+obj-$(CONFIG_VIRTIO_BLK) += virtio-blk.o
+obj-$(CONFIG_VIRTIO_BLK) += dataplane/
obj-$(CONFIG_VHOST_USER_BLK) += vhost-user-blk.o
-endif
diff --git a/hw/block/dataplane/virtio-blk.c b/hw/block/dataplane/virtio-blk.c
index 101f32c..d648aeb 100644
--- a/hw/block/dataplane/virtio-blk.c
+++ b/hw/block/dataplane/virtio-blk.c
@@ -19,7 +19,6 @@
#include "qemu/thread.h"
#include "qemu/error-report.h"
#include "hw/virtio/virtio-access.h"
-#include "sysemu/block-backend.h"
#include "hw/virtio/virtio-blk.h"
#include "virtio-blk.h"
#include "block/aio.h"
diff --git a/hw/block/m25p80.c b/hw/block/m25p80.c
index b49c8e9..a5ccffb 100644
--- a/hw/block/m25p80.c
+++ b/hw/block/m25p80.c
@@ -24,7 +24,6 @@
#include "qemu/osdep.h"
#include "hw/hw.h"
#include "sysemu/block-backend.h"
-#include "sysemu/blockdev.h"
#include "hw/ssi/ssi.h"
#include "qemu/bitops.h"
#include "qemu/log.h"
diff --git a/hw/block/nvme.c b/hw/block/nvme.c
index 85d2406..811084b 100644
--- a/hw/block/nvme.c
+++ b/hw/block/nvme.c
@@ -35,6 +35,7 @@
#include "sysemu/block-backend.h"
#include "qemu/log.h"
+#include "qemu/cutils.h"
#include "trace.h"
#include "nvme.h"
diff --git a/hw/block/nvme.h b/hw/block/nvme.h
index 8f39811..cabcf20 100644
--- a/hw/block/nvme.h
+++ b/hw/block/nvme.h
@@ -1,6 +1,5 @@
#ifndef HW_NVME_H
#define HW_NVME_H
-#include "qemu/cutils.h"
#include "block/nvme.h"
typedef struct NvmeAsyncEvent {
diff --git a/hw/block/onenand.c b/hw/block/onenand.c
index ed77f85..0cb8d7f 100644
--- a/hw/block/onenand.c
+++ b/hw/block/onenand.c
@@ -25,9 +25,7 @@
#include "hw/block/flash.h"
#include "hw/irq.h"
#include "sysemu/block-backend.h"
-#include "sysemu/blockdev.h"
#include "exec/memory.h"
-#include "exec/address-spaces.h"
#include "hw/sysbus.h"
#include "qemu/error-report.h"
diff --git a/hw/block/pflash_cfi01.c b/hw/block/pflash_cfi01.c
index 2e82840..e4b5b3c 100644
--- a/hw/block/pflash_cfi01.c
+++ b/hw/block/pflash_cfi01.c
@@ -43,7 +43,6 @@
#include "qapi/error.h"
#include "qemu/timer.h"
#include "qemu/bitops.h"
-#include "exec/address-spaces.h"
#include "qemu/host-utils.h"
#include "qemu/log.h"
#include "hw/sysbus.h"
diff --git a/hw/block/pflash_cfi02.c b/hw/block/pflash_cfi02.c
index 75d1ae1..a8b3f7f 100644
--- a/hw/block/pflash_cfi02.c
+++ b/hw/block/pflash_cfi02.c
@@ -41,7 +41,6 @@
#include "qapi/error.h"
#include "qemu/timer.h"
#include "sysemu/block-backend.h"
-#include "exec/address-spaces.h"
#include "qemu/host-utils.h"
#include "hw/sysbus.h"
diff --git a/hw/block/virtio-blk.c b/hw/block/virtio-blk.c
index b1532e4..50b5c86 100644
--- a/hw/block/virtio-blk.c
+++ b/hw/block/virtio-blk.c
@@ -18,7 +18,6 @@
#include "qemu/error-report.h"
#include "trace.h"
#include "hw/block/block.h"
-#include "sysemu/block-backend.h"
#include "sysemu/blockdev.h"
#include "hw/virtio/virtio-blk.h"
#include "dataplane/virtio-blk.h"
diff --git a/hw/block/xen_disk.c b/hw/block/xen_disk.c
index f74fcd4..9fbc0cd 100644
--- a/hw/block/xen_disk.c
+++ b/hw/block/xen_disk.c
@@ -36,27 +36,9 @@
/* ------------------------------------------------------------- */
-static int batch_maps = 0;
-
-/* ------------------------------------------------------------- */
-
#define BLOCK_SIZE 512
#define IOCB_COUNT (BLKIF_MAX_SEGMENTS_PER_REQUEST + 2)
-struct PersistentGrant {
- void *page;
- struct XenBlkDev *blkdev;
-};
-
-typedef struct PersistentGrant PersistentGrant;
-
-struct PersistentRegion {
- void *addr;
- int num;
-};
-
-typedef struct PersistentRegion PersistentRegion;
-
struct ioreq {
blkif_request_t req;
int16_t status;
@@ -64,16 +46,9 @@ struct ioreq {
/* parsed request */
off_t start;
QEMUIOVector v;
+ void *buf;
+ size_t size;
int presync;
- uint8_t mapped;
-
- /* grant mapping */
- uint32_t domids[BLKIF_MAX_SEGMENTS_PER_REQUEST];
- uint32_t refs[BLKIF_MAX_SEGMENTS_PER_REQUEST];
- int prot;
- void *page[BLKIF_MAX_SEGMENTS_PER_REQUEST];
- void *pages;
- int num_unmap;
/* aio status */
int aio_inflight;
@@ -104,7 +79,6 @@ struct XenBlkDev {
int protocol;
blkif_back_rings_t rings;
int more_work;
- int cnt_map;
/* request lists */
QLIST_HEAD(inflight_head, ioreq) inflight;
@@ -115,13 +89,7 @@ struct XenBlkDev {
int requests_finished;
unsigned int max_requests;
- /* Persistent grants extension */
gboolean feature_discard;
- gboolean feature_persistent;
- GTree *persistent_gnts;
- GSList *persistent_regions;
- unsigned int persistent_gnt_count;
- unsigned int max_grants;
/* qemu block driver */
DriveInfo *dinfo;
@@ -139,14 +107,9 @@ static void ioreq_reset(struct ioreq *ioreq)
memset(&ioreq->req, 0, sizeof(ioreq->req));
ioreq->status = 0;
ioreq->start = 0;
+ ioreq->buf = NULL;
+ ioreq->size = 0;
ioreq->presync = 0;
- ioreq->mapped = 0;
-
- memset(ioreq->domids, 0, sizeof(ioreq->domids));
- memset(ioreq->refs, 0, sizeof(ioreq->refs));
- ioreq->prot = 0;
- memset(ioreq->page, 0, sizeof(ioreq->page));
- ioreq->pages = NULL;
ioreq->aio_inflight = 0;
ioreq->aio_errors = 0;
@@ -158,46 +121,6 @@ static void ioreq_reset(struct ioreq *ioreq)
qemu_iovec_reset(&ioreq->v);
}
-static gint int_cmp(gconstpointer a, gconstpointer b, gpointer user_data)
-{
- uint ua = GPOINTER_TO_UINT(a);
- uint ub = GPOINTER_TO_UINT(b);
- return (ua > ub) - (ua < ub);
-}
-
-static void destroy_grant(gpointer pgnt)
-{
- PersistentGrant *grant = pgnt;
- xengnttab_handle *gnt = grant->blkdev->xendev.gnttabdev;
-
- if (xengnttab_unmap(gnt, grant->page, 1) != 0) {
- xen_pv_printf(&grant->blkdev->xendev, 0,
- "xengnttab_unmap failed: %s\n",
- strerror(errno));
- }
- grant->blkdev->persistent_gnt_count--;
- xen_pv_printf(&grant->blkdev->xendev, 3,
- "unmapped grant %p\n", grant->page);
- g_free(grant);
-}
-
-static void remove_persistent_region(gpointer data, gpointer dev)
-{
- PersistentRegion *region = data;
- struct XenBlkDev *blkdev = dev;
- xengnttab_handle *gnt = blkdev->xendev.gnttabdev;
-
- if (xengnttab_unmap(gnt, region->addr, region->num) != 0) {
- xen_pv_printf(&blkdev->xendev, 0,
- "xengnttab_unmap region %p failed: %s\n",
- region->addr, strerror(errno));
- }
- xen_pv_printf(&blkdev->xendev, 3,
- "unmapped grant region %p with %d pages\n",
- region->addr, region->num);
- g_free(region);
-}
-
static struct ioreq *ioreq_start(struct XenBlkDev *blkdev)
{
struct ioreq *ioreq = NULL;
@@ -210,7 +133,7 @@ static struct ioreq *ioreq_start(struct XenBlkDev *blkdev)
ioreq = g_malloc0(sizeof(*ioreq));
ioreq->blkdev = blkdev;
blkdev->requests_total++;
- qemu_iovec_init(&ioreq->v, BLKIF_MAX_SEGMENTS_PER_REQUEST);
+ qemu_iovec_init(&ioreq->v, 1);
} else {
/* get one from freelist */
ioreq = QLIST_FIRST(&blkdev->freelist);
@@ -255,17 +178,16 @@ static void ioreq_release(struct ioreq *ioreq, bool finish)
static int ioreq_parse(struct ioreq *ioreq)
{
struct XenBlkDev *blkdev = ioreq->blkdev;
- uintptr_t mem;
+ struct XenDevice *xendev = &blkdev->xendev;
size_t len;
int i;
- xen_pv_printf(&blkdev->xendev, 3,
+ xen_pv_printf(xendev, 3,
"op %d, nr %d, handle %d, id %" PRId64 ", sector %" PRId64 "\n",
ioreq->req.operation, ioreq->req.nr_segments,
ioreq->req.handle, ioreq->req.id, ioreq->req.sector_number);
switch (ioreq->req.operation) {
case BLKIF_OP_READ:
- ioreq->prot = PROT_WRITE; /* to memory */
break;
case BLKIF_OP_FLUSH_DISKCACHE:
ioreq->presync = 1;
@@ -274,45 +196,40 @@ static int ioreq_parse(struct ioreq *ioreq)
}
/* fall through */
case BLKIF_OP_WRITE:
- ioreq->prot = PROT_READ; /* from memory */
break;
case BLKIF_OP_DISCARD:
return 0;
default:
- xen_pv_printf(&blkdev->xendev, 0, "error: unknown operation (%d)\n",
+ xen_pv_printf(xendev, 0, "error: unknown operation (%d)\n",
ioreq->req.operation);
goto err;
};
if (ioreq->req.operation != BLKIF_OP_READ && blkdev->mode[0] != 'w') {
- xen_pv_printf(&blkdev->xendev, 0, "error: write req for ro device\n");
+ xen_pv_printf(xendev, 0, "error: write req for ro device\n");
goto err;
}
ioreq->start = ioreq->req.sector_number * blkdev->file_blk;
for (i = 0; i < ioreq->req.nr_segments; i++) {
if (i == BLKIF_MAX_SEGMENTS_PER_REQUEST) {
- xen_pv_printf(&blkdev->xendev, 0, "error: nr_segments too big\n");
+ xen_pv_printf(xendev, 0, "error: nr_segments too big\n");
goto err;
}
if (ioreq->req.seg[i].first_sect > ioreq->req.seg[i].last_sect) {
- xen_pv_printf(&blkdev->xendev, 0, "error: first > last sector\n");
+ xen_pv_printf(xendev, 0, "error: first > last sector\n");
goto err;
}
if (ioreq->req.seg[i].last_sect * BLOCK_SIZE >= XC_PAGE_SIZE) {
- xen_pv_printf(&blkdev->xendev, 0, "error: page crossing\n");
+ xen_pv_printf(xendev, 0, "error: page crossing\n");
goto err;
}
- ioreq->domids[i] = blkdev->xendev.dom;
- ioreq->refs[i] = ioreq->req.seg[i].gref;
-
- mem = ioreq->req.seg[i].first_sect * blkdev->file_blk;
len = (ioreq->req.seg[i].last_sect - ioreq->req.seg[i].first_sect + 1) * blkdev->file_blk;
- qemu_iovec_add(&ioreq->v, (void*)mem, len);
+ ioreq->size += len;
}
- if (ioreq->start + ioreq->v.size > blkdev->file_size) {
- xen_pv_printf(&blkdev->xendev, 0, "error: access beyond end of file\n");
+ if (ioreq->start + ioreq->size > blkdev->file_size) {
+ xen_pv_printf(xendev, 0, "error: access beyond end of file\n");
goto err;
}
return 0;
@@ -322,279 +239,48 @@ err:
return -1;
}
-static void ioreq_unmap(struct ioreq *ioreq)
-{
- xengnttab_handle *gnt = ioreq->blkdev->xendev.gnttabdev;
- int i;
-
- if (ioreq->num_unmap == 0 || ioreq->mapped == 0) {
- return;
- }
- if (batch_maps) {
- if (!ioreq->pages) {
- return;
- }
- if (xengnttab_unmap(gnt, ioreq->pages, ioreq->num_unmap) != 0) {
- xen_pv_printf(&ioreq->blkdev->xendev, 0,
- "xengnttab_unmap failed: %s\n",
- strerror(errno));
- }
- ioreq->blkdev->cnt_map -= ioreq->num_unmap;
- ioreq->pages = NULL;
- } else {
- for (i = 0; i < ioreq->num_unmap; i++) {
- if (!ioreq->page[i]) {
- continue;
- }
- if (xengnttab_unmap(gnt, ioreq->page[i], 1) != 0) {
- xen_pv_printf(&ioreq->blkdev->xendev, 0,
- "xengnttab_unmap failed: %s\n",
- strerror(errno));
- }
- ioreq->blkdev->cnt_map--;
- ioreq->page[i] = NULL;
- }
- }
- ioreq->mapped = 0;
-}
-
-static int ioreq_map(struct ioreq *ioreq)
-{
- xengnttab_handle *gnt = ioreq->blkdev->xendev.gnttabdev;
- uint32_t domids[BLKIF_MAX_SEGMENTS_PER_REQUEST];
- uint32_t refs[BLKIF_MAX_SEGMENTS_PER_REQUEST];
- void *page[BLKIF_MAX_SEGMENTS_PER_REQUEST];
- int i, j, new_maps = 0;
- PersistentGrant *grant;
- PersistentRegion *region;
- /* domids and refs variables will contain the information necessary
- * to map the grants that are needed to fulfill this request.
- *
- * After mapping the needed grants, the page array will contain the
- * memory address of each granted page in the order specified in ioreq
- * (disregarding if it's a persistent grant or not).
- */
-
- if (ioreq->v.niov == 0 || ioreq->mapped == 1) {
- return 0;
- }
- if (ioreq->blkdev->feature_persistent) {
- for (i = 0; i < ioreq->v.niov; i++) {
- grant = g_tree_lookup(ioreq->blkdev->persistent_gnts,
- GUINT_TO_POINTER(ioreq->refs[i]));
-
- if (grant != NULL) {
- page[i] = grant->page;
- xen_pv_printf(&ioreq->blkdev->xendev, 3,
- "using persistent-grant %" PRIu32 "\n",
- ioreq->refs[i]);
- } else {
- /* Add the grant to the list of grants that
- * should be mapped
- */
- domids[new_maps] = ioreq->domids[i];
- refs[new_maps] = ioreq->refs[i];
- page[i] = NULL;
- new_maps++;
- }
- }
- /* Set the protection to RW, since grants may be reused later
- * with a different protection than the one needed for this request
- */
- ioreq->prot = PROT_WRITE | PROT_READ;
- } else {
- /* All grants in the request should be mapped */
- memcpy(refs, ioreq->refs, sizeof(refs));
- memcpy(domids, ioreq->domids, sizeof(domids));
- memset(page, 0, sizeof(page));
- new_maps = ioreq->v.niov;
- }
-
- if (batch_maps && new_maps) {
- ioreq->pages = xengnttab_map_grant_refs
- (gnt, new_maps, domids, refs, ioreq->prot);
- if (ioreq->pages == NULL) {
- xen_pv_printf(&ioreq->blkdev->xendev, 0,
- "can't map %d grant refs (%s, %d maps)\n",
- new_maps, strerror(errno), ioreq->blkdev->cnt_map);
- return -1;
- }
- for (i = 0, j = 0; i < ioreq->v.niov; i++) {
- if (page[i] == NULL) {
- page[i] = ioreq->pages + (j++) * XC_PAGE_SIZE;
- }
- }
- ioreq->blkdev->cnt_map += new_maps;
- } else if (new_maps) {
- for (i = 0; i < new_maps; i++) {
- ioreq->page[i] = xengnttab_map_grant_ref
- (gnt, domids[i], refs[i], ioreq->prot);
- if (ioreq->page[i] == NULL) {
- xen_pv_printf(&ioreq->blkdev->xendev, 0,
- "can't map grant ref %d (%s, %d maps)\n",
- refs[i], strerror(errno), ioreq->blkdev->cnt_map);
- ioreq->mapped = 1;
- ioreq_unmap(ioreq);
- return -1;
- }
- ioreq->blkdev->cnt_map++;
- }
- for (i = 0, j = 0; i < ioreq->v.niov; i++) {
- if (page[i] == NULL) {
- page[i] = ioreq->page[j++];
- }
- }
- }
- if (ioreq->blkdev->feature_persistent && new_maps != 0 &&
- (!batch_maps || (ioreq->blkdev->persistent_gnt_count + new_maps <=
- ioreq->blkdev->max_grants))) {
- /*
- * If we are using persistent grants and batch mappings only
- * add the new maps to the list of persistent grants if the whole
- * area can be persistently mapped.
- */
- if (batch_maps) {
- region = g_malloc0(sizeof(*region));
- region->addr = ioreq->pages;
- region->num = new_maps;
- ioreq->blkdev->persistent_regions = g_slist_append(
- ioreq->blkdev->persistent_regions,
- region);
- }
- while ((ioreq->blkdev->persistent_gnt_count < ioreq->blkdev->max_grants)
- && new_maps) {
- /* Go through the list of newly mapped grants and add as many
- * as possible to the list of persistently mapped grants.
- *
- * Since we start at the end of ioreq->page(s), we only need
- * to decrease new_maps to prevent this granted pages from
- * being unmapped in ioreq_unmap.
- */
- grant = g_malloc0(sizeof(*grant));
- new_maps--;
- if (batch_maps) {
- grant->page = ioreq->pages + (new_maps) * XC_PAGE_SIZE;
- } else {
- grant->page = ioreq->page[new_maps];
- }
- grant->blkdev = ioreq->blkdev;
- xen_pv_printf(&ioreq->blkdev->xendev, 3,
- "adding grant %" PRIu32 " page: %p\n",
- refs[new_maps], grant->page);
- g_tree_insert(ioreq->blkdev->persistent_gnts,
- GUINT_TO_POINTER(refs[new_maps]),
- grant);
- ioreq->blkdev->persistent_gnt_count++;
- }
- assert(!batch_maps || new_maps == 0);
- }
- for (i = 0; i < ioreq->v.niov; i++) {
- ioreq->v.iov[i].iov_base += (uintptr_t)page[i];
- }
- ioreq->mapped = 1;
- ioreq->num_unmap = new_maps;
- return 0;
-}
-
-#if CONFIG_XEN_CTRL_INTERFACE_VERSION >= 40800
-
-static void ioreq_free_copy_buffers(struct ioreq *ioreq)
-{
- int i;
-
- for (i = 0; i < ioreq->v.niov; i++) {
- ioreq->page[i] = NULL;
- }
-
- qemu_vfree(ioreq->pages);
-}
-
-static int ioreq_init_copy_buffers(struct ioreq *ioreq)
-{
- int i;
-
- if (ioreq->v.niov == 0) {
- return 0;
- }
-
- ioreq->pages = qemu_memalign(XC_PAGE_SIZE, ioreq->v.niov * XC_PAGE_SIZE);
-
- for (i = 0; i < ioreq->v.niov; i++) {
- ioreq->page[i] = ioreq->pages + i * XC_PAGE_SIZE;
- ioreq->v.iov[i].iov_base = ioreq->page[i];
- }
-
- return 0;
-}
-
static int ioreq_grant_copy(struct ioreq *ioreq)
{
- xengnttab_handle *gnt = ioreq->blkdev->xendev.gnttabdev;
- xengnttab_grant_copy_segment_t segs[BLKIF_MAX_SEGMENTS_PER_REQUEST];
+ struct XenBlkDev *blkdev = ioreq->blkdev;
+ struct XenDevice *xendev = &blkdev->xendev;
+ XenGrantCopySegment segs[BLKIF_MAX_SEGMENTS_PER_REQUEST];
int i, count, rc;
- int64_t file_blk = ioreq->blkdev->file_blk;
+ int64_t file_blk = blkdev->file_blk;
+ bool to_domain = (ioreq->req.operation == BLKIF_OP_READ);
+ void *virt = ioreq->buf;
- if (ioreq->v.niov == 0) {
+ if (ioreq->req.nr_segments == 0) {
return 0;
}
- count = ioreq->v.niov;
+ count = ioreq->req.nr_segments;
for (i = 0; i < count; i++) {
- if (ioreq->req.operation == BLKIF_OP_READ) {
- segs[i].flags = GNTCOPY_dest_gref;
- segs[i].dest.foreign.ref = ioreq->refs[i];
- segs[i].dest.foreign.domid = ioreq->domids[i];
+ if (to_domain) {
+ segs[i].dest.foreign.ref = ioreq->req.seg[i].gref;
segs[i].dest.foreign.offset = ioreq->req.seg[i].first_sect * file_blk;
- segs[i].source.virt = ioreq->v.iov[i].iov_base;
+ segs[i].source.virt = virt;
} else {
- segs[i].flags = GNTCOPY_source_gref;
- segs[i].source.foreign.ref = ioreq->refs[i];
- segs[i].source.foreign.domid = ioreq->domids[i];
+ segs[i].source.foreign.ref = ioreq->req.seg[i].gref;
segs[i].source.foreign.offset = ioreq->req.seg[i].first_sect * file_blk;
- segs[i].dest.virt = ioreq->v.iov[i].iov_base;
+ segs[i].dest.virt = virt;
}
segs[i].len = (ioreq->req.seg[i].last_sect
- ioreq->req.seg[i].first_sect + 1) * file_blk;
+ virt += segs[i].len;
}
- rc = xengnttab_grant_copy(gnt, count, segs);
+ rc = xen_be_copy_grant_refs(xendev, to_domain, segs, count);
if (rc) {
- xen_pv_printf(&ioreq->blkdev->xendev, 0,
+ xen_pv_printf(xendev, 0,
"failed to copy data %d\n", rc);
ioreq->aio_errors++;
return -1;
}
- for (i = 0; i < count; i++) {
- if (segs[i].status != GNTST_okay) {
- xen_pv_printf(&ioreq->blkdev->xendev, 3,
- "failed to copy data %d for gref %d, domid %d\n",
- segs[i].status, ioreq->refs[i], ioreq->domids[i]);
- ioreq->aio_errors++;
- rc = -1;
- }
- }
-
return rc;
}
-#else
-static void ioreq_free_copy_buffers(struct ioreq *ioreq)
-{
- abort();
-}
-
-static int ioreq_init_copy_buffers(struct ioreq *ioreq)
-{
- abort();
-}
-
-static int ioreq_grant_copy(struct ioreq *ioreq)
-{
- abort();
-}
-#endif
static int ioreq_runio_qemu_aio(struct ioreq *ioreq);
@@ -602,11 +288,12 @@ static void qemu_aio_complete(void *opaque, int ret)
{
struct ioreq *ioreq = opaque;
struct XenBlkDev *blkdev = ioreq->blkdev;
+ struct XenDevice *xendev = &blkdev->xendev;
aio_context_acquire(blkdev->ctx);
if (ret != 0) {
- xen_pv_printf(&blkdev->xendev, 0, "%s I/O error\n",
+ xen_pv_printf(xendev, 0, "%s I/O error\n",
ioreq->req.operation == BLKIF_OP_READ ? "read" : "write");
ioreq->aio_errors++;
}
@@ -621,32 +308,28 @@ static void qemu_aio_complete(void *opaque, int ret)
goto done;
}
- if (xen_feature_grant_copy) {
- switch (ioreq->req.operation) {
- case BLKIF_OP_READ:
- /* in case of failure ioreq->aio_errors is increased */
- if (ret == 0) {
- ioreq_grant_copy(ioreq);
- }
- ioreq_free_copy_buffers(ioreq);
- break;
- case BLKIF_OP_WRITE:
- case BLKIF_OP_FLUSH_DISKCACHE:
- if (!ioreq->req.nr_segments) {
- break;
- }
- ioreq_free_copy_buffers(ioreq);
- break;
- default:
+ switch (ioreq->req.operation) {
+ case BLKIF_OP_READ:
+ /* in case of failure ioreq->aio_errors is increased */
+ if (ret == 0) {
+ ioreq_grant_copy(ioreq);
+ }
+ qemu_vfree(ioreq->buf);
+ break;
+ case BLKIF_OP_WRITE:
+ case BLKIF_OP_FLUSH_DISKCACHE:
+ if (!ioreq->req.nr_segments) {
break;
}
+ qemu_vfree(ioreq->buf);
+ break;
+ default:
+ break;
}
ioreq->status = ioreq->aio_errors ? BLKIF_RSP_ERROR : BLKIF_RSP_OKAY;
- if (!xen_feature_grant_copy) {
- ioreq_unmap(ioreq);
- }
ioreq_finish(ioreq);
+
switch (ioreq->req.operation) {
case BLKIF_OP_WRITE:
case BLKIF_OP_FLUSH_DISKCACHE:
@@ -706,18 +389,13 @@ static int ioreq_runio_qemu_aio(struct ioreq *ioreq)
{
struct XenBlkDev *blkdev = ioreq->blkdev;
- if (xen_feature_grant_copy) {
- ioreq_init_copy_buffers(ioreq);
- if (ioreq->req.nr_segments && (ioreq->req.operation == BLKIF_OP_WRITE ||
- ioreq->req.operation == BLKIF_OP_FLUSH_DISKCACHE) &&
- ioreq_grant_copy(ioreq)) {
- ioreq_free_copy_buffers(ioreq);
- goto err;
- }
- } else {
- if (ioreq->req.nr_segments && ioreq_map(ioreq)) {
- goto err;
- }
+ ioreq->buf = qemu_memalign(XC_PAGE_SIZE, ioreq->size);
+ if (ioreq->req.nr_segments &&
+ (ioreq->req.operation == BLKIF_OP_WRITE ||
+ ioreq->req.operation == BLKIF_OP_FLUSH_DISKCACHE) &&
+ ioreq_grant_copy(ioreq)) {
+ qemu_vfree(ioreq->buf);
+ goto err;
}
ioreq->aio_inflight++;
@@ -728,6 +406,7 @@ static int ioreq_runio_qemu_aio(struct ioreq *ioreq)
switch (ioreq->req.operation) {
case BLKIF_OP_READ:
+ qemu_iovec_add(&ioreq->v, ioreq->buf, ioreq->size);
block_acct_start(blk_get_stats(blkdev->blk), &ioreq->acct,
ioreq->v.size, BLOCK_ACCT_READ);
ioreq->aio_inflight++;
@@ -740,6 +419,7 @@ static int ioreq_runio_qemu_aio(struct ioreq *ioreq)
break;
}
+ qemu_iovec_add(&ioreq->v, ioreq->buf, ioreq->size);
block_acct_start(blk_get_stats(blkdev->blk), &ioreq->acct,
ioreq->v.size,
ioreq->req.operation == BLKIF_OP_WRITE ?
@@ -758,9 +438,6 @@ static int ioreq_runio_qemu_aio(struct ioreq *ioreq)
}
default:
/* unknown operation (shouldn't happen -- parse catches this) */
- if (!xen_feature_grant_copy) {
- ioreq_unmap(ioreq);
- }
goto err;
}
@@ -946,24 +623,21 @@ static void blk_alloc(struct XenDevice *xendev)
blkdev->ctx = iothread_get_aio_context(blkdev->iothread);
blkdev->bh = aio_bh_new(blkdev->ctx, blk_bh, blkdev);
-
- if (xen_mode != XEN_EMULATE) {
- batch_maps = 1;
- }
}
static void blk_parse_discard(struct XenBlkDev *blkdev)
{
+ struct XenDevice *xendev = &blkdev->xendev;
int enable;
blkdev->feature_discard = true;
- if (xenstore_read_be_int(&blkdev->xendev, "discard-enable", &enable) == 0) {
+ if (xenstore_read_be_int(xendev, "discard-enable", &enable) == 0) {
blkdev->feature_discard = !!enable;
}
if (blkdev->feature_discard) {
- xenstore_write_be_int(&blkdev->xendev, "feature-discard", 1);
+ xenstore_write_be_int(xendev, "feature-discard", 1);
}
}
@@ -978,7 +652,7 @@ static int blk_init(struct XenDevice *xendev)
/* read xenstore entries */
if (blkdev->params == NULL) {
char *h = NULL;
- blkdev->params = xenstore_read_be_str(&blkdev->xendev, "params");
+ blkdev->params = xenstore_read_be_str(xendev, "params");
if (blkdev->params != NULL) {
h = strchr(blkdev->params, ':');
}
@@ -998,18 +672,18 @@ static int blk_init(struct XenDevice *xendev)
blkdev->fileproto = "vpc";
}
if (blkdev->mode == NULL) {
- blkdev->mode = xenstore_read_be_str(&blkdev->xendev, "mode");
+ blkdev->mode = xenstore_read_be_str(xendev, "mode");
}
if (blkdev->type == NULL) {
- blkdev->type = xenstore_read_be_str(&blkdev->xendev, "type");
+ blkdev->type = xenstore_read_be_str(xendev, "type");
}
if (blkdev->dev == NULL) {
- blkdev->dev = xenstore_read_be_str(&blkdev->xendev, "dev");
+ blkdev->dev = xenstore_read_be_str(xendev, "dev");
}
if (blkdev->devtype == NULL) {
- blkdev->devtype = xenstore_read_be_str(&blkdev->xendev, "device-type");
+ blkdev->devtype = xenstore_read_be_str(xendev, "device-type");
}
- directiosafe = xenstore_read_be_str(&blkdev->xendev, "direct-io-safe");
+ directiosafe = xenstore_read_be_str(xendev, "direct-io-safe");
blkdev->directiosafe = (directiosafe && atoi(directiosafe));
/* do we have all we need? */
@@ -1032,18 +706,13 @@ static int blk_init(struct XenDevice *xendev)
blkdev->file_blk = BLOCK_SIZE;
- xen_pv_printf(&blkdev->xendev, 3, "grant copy operation %s\n",
- xen_feature_grant_copy ? "enabled" : "disabled");
-
/* fill info
* blk_connect supplies sector-size and sectors
*/
- xenstore_write_be_int(&blkdev->xendev, "feature-flush-cache", 1);
- xenstore_write_be_int(&blkdev->xendev, "feature-persistent",
- !xen_feature_grant_copy);
- xenstore_write_be_int(&blkdev->xendev, "info", info);
+ xenstore_write_be_int(xendev, "feature-flush-cache", 1);
+ xenstore_write_be_int(xendev, "info", info);
- xenstore_write_be_int(&blkdev->xendev, "max-ring-page-order",
+ xenstore_write_be_int(xendev, "max-ring-page-order",
MAX_RING_PAGE_ORDER);
blk_parse_discard(blkdev);
@@ -1067,25 +736,15 @@ out_error:
return -1;
}
-/*
- * We need to account for the grant allocations requiring contiguous
- * chunks; the worst case number would be
- * max_req * max_seg + (max_req - 1) * (max_seg - 1) + 1,
- * but in order to keep things simple just use
- * 2 * max_req * max_seg.
- */
-#define MAX_GRANTS(max_req, max_seg) (2 * (max_req) * (max_seg))
-
static int blk_connect(struct XenDevice *xendev)
{
struct XenBlkDev *blkdev = container_of(xendev, struct XenBlkDev, xendev);
- int pers, index, qflags;
+ int index, qflags;
bool readonly = true;
bool writethrough = true;
int order, ring_ref;
unsigned int ring_size, max_grants;
unsigned int i;
- uint32_t *domids;
trace_xen_disk_connect(xendev->name);
@@ -1105,7 +764,7 @@ static int blk_connect(struct XenDevice *xendev)
}
/* init qemu block driver */
- index = (blkdev->xendev.dev - 202 * 256) / 16;
+ index = (xendev->dev - 202 * 256) / 16;
blkdev->dinfo = drive_get(IF_XEN, 0, index);
if (!blkdev->dinfo) {
Error *local_err = NULL;
@@ -1117,11 +776,11 @@ static int blk_connect(struct XenDevice *xendev)
}
/* setup via xenbus -> create new block driver instance */
- xen_pv_printf(&blkdev->xendev, 2, "create new bdrv (xenbus setup)\n");
+ xen_pv_printf(xendev, 2, "create new bdrv (xenbus setup)\n");
blkdev->blk = blk_new_open(blkdev->filename, NULL, options,
qflags, &local_err);
if (!blkdev->blk) {
- xen_pv_printf(&blkdev->xendev, 0, "error: %s\n",
+ xen_pv_printf(xendev, 0, "error: %s\n",
error_get_pretty(local_err));
error_free(local_err);
return -1;
@@ -1129,11 +788,11 @@ static int blk_connect(struct XenDevice *xendev)
blk_set_enable_write_cache(blkdev->blk, !writethrough);
} else {
/* setup via qemu cmdline -> already setup for us */
- xen_pv_printf(&blkdev->xendev, 2,
+ xen_pv_printf(xendev, 2,
"get configured bdrv (cmdline setup)\n");
blkdev->blk = blk_by_legacy_dinfo(blkdev->dinfo);
if (blk_is_read_only(blkdev->blk) && !readonly) {
- xen_pv_printf(&blkdev->xendev, 0, "Unexpected read-only drive");
+ xen_pv_printf(xendev, 0, "Unexpected read-only drive");
blkdev->blk = NULL;
return -1;
}
@@ -1146,7 +805,7 @@ static int blk_connect(struct XenDevice *xendev)
if (blkdev->file_size < 0) {
BlockDriverState *bs = blk_bs(blkdev->blk);
const char *drv_name = bs ? bdrv_get_format_name(bs) : NULL;
- xen_pv_printf(&blkdev->xendev, 1, "blk_getlength: %d (%s) | drv %s\n",
+ xen_pv_printf(xendev, 1, "blk_getlength: %d (%s) | drv %s\n",
(int)blkdev->file_size, strerror(-blkdev->file_size),
drv_name ?: "-");
blkdev->file_size = 0;
@@ -1158,15 +817,15 @@ static int blk_connect(struct XenDevice *xendev)
blkdev->file_size, blkdev->file_size >> 20);
/* Fill in number of sector size and number of sectors */
- xenstore_write_be_int(&blkdev->xendev, "sector-size", blkdev->file_blk);
- xenstore_write_be_int64(&blkdev->xendev, "sectors",
+ xenstore_write_be_int(xendev, "sector-size", blkdev->file_blk);
+ xenstore_write_be_int64(xendev, "sectors",
blkdev->file_size / blkdev->file_blk);
- if (xenstore_read_fe_int(&blkdev->xendev, "ring-page-order",
+ if (xenstore_read_fe_int(xendev, "ring-page-order",
&order) == -1) {
blkdev->nr_ring_ref = 1;
- if (xenstore_read_fe_int(&blkdev->xendev, "ring-ref",
+ if (xenstore_read_fe_int(xendev, "ring-ref",
&ring_ref) == -1) {
return -1;
}
@@ -1183,7 +842,7 @@ static int blk_connect(struct XenDevice *xendev)
return -1;
}
- if (xenstore_read_fe_int(&blkdev->xendev, key,
+ if (xenstore_read_fe_int(xendev, key,
&ring_ref) == -1) {
g_free(key);
return -1;
@@ -1198,23 +857,18 @@ static int blk_connect(struct XenDevice *xendev)
return -1;
}
- if (xenstore_read_fe_int(&blkdev->xendev, "event-channel",
- &blkdev->xendev.remote_port) == -1) {
+ if (xenstore_read_fe_int(xendev, "event-channel",
+ &xendev->remote_port) == -1) {
return -1;
}
- if (xenstore_read_fe_int(&blkdev->xendev, "feature-persistent", &pers)) {
- blkdev->feature_persistent = FALSE;
- } else {
- blkdev->feature_persistent = !!pers;
- }
- if (!blkdev->xendev.protocol) {
+ if (!xendev->protocol) {
blkdev->protocol = BLKIF_PROTOCOL_NATIVE;
- } else if (strcmp(blkdev->xendev.protocol, XEN_IO_PROTO_ABI_NATIVE) == 0) {
+ } else if (strcmp(xendev->protocol, XEN_IO_PROTO_ABI_NATIVE) == 0) {
blkdev->protocol = BLKIF_PROTOCOL_NATIVE;
- } else if (strcmp(blkdev->xendev.protocol, XEN_IO_PROTO_ABI_X86_32) == 0) {
+ } else if (strcmp(xendev->protocol, XEN_IO_PROTO_ABI_X86_32) == 0) {
blkdev->protocol = BLKIF_PROTOCOL_X86_32;
- } else if (strcmp(blkdev->xendev.protocol, XEN_IO_PROTO_ABI_X86_64) == 0) {
+ } else if (strcmp(xendev->protocol, XEN_IO_PROTO_ABI_X86_64) == 0) {
blkdev->protocol = BLKIF_PROTOCOL_X86_64;
} else {
blkdev->protocol = BLKIF_PROTOCOL_NATIVE;
@@ -1241,43 +895,17 @@ static int blk_connect(struct XenDevice *xendev)
return -1;
}
- /* Calculate the maximum number of grants needed by ioreqs */
- max_grants = MAX_GRANTS(blkdev->max_requests,
- BLKIF_MAX_SEGMENTS_PER_REQUEST);
/* Add on the number needed for the ring pages */
- max_grants += blkdev->nr_ring_ref;
-
- blkdev->xendev.gnttabdev = xengnttab_open(NULL, 0);
- if (blkdev->xendev.gnttabdev == NULL) {
- xen_pv_printf(xendev, 0, "xengnttab_open failed: %s\n",
- strerror(errno));
- return -1;
- }
- if (xengnttab_set_max_grants(blkdev->xendev.gnttabdev, max_grants)) {
- xen_pv_printf(xendev, 0, "xengnttab_set_max_grants failed: %s\n",
- strerror(errno));
- return -1;
- }
-
- domids = g_new0(uint32_t, blkdev->nr_ring_ref);
- for (i = 0; i < blkdev->nr_ring_ref; i++) {
- domids[i] = blkdev->xendev.dom;
- }
-
- blkdev->sring = xengnttab_map_grant_refs(blkdev->xendev.gnttabdev,
- blkdev->nr_ring_ref,
- domids,
- blkdev->ring_ref,
- PROT_READ | PROT_WRITE);
-
- g_free(domids);
+ max_grants = blkdev->nr_ring_ref;
+ xen_be_set_max_grant_refs(xendev, max_grants);
+ blkdev->sring = xen_be_map_grant_refs(xendev, blkdev->ring_ref,
+ blkdev->nr_ring_ref,
+ PROT_READ | PROT_WRITE);
if (!blkdev->sring) {
return -1;
}
- blkdev->cnt_map++;
-
switch (blkdev->protocol) {
case BLKIF_PROTOCOL_NATIVE:
{
@@ -1301,27 +929,14 @@ static int blk_connect(struct XenDevice *xendev)
}
}
- if (blkdev->feature_persistent) {
- /* Init persistent grants */
- blkdev->max_grants = blkdev->max_requests *
- BLKIF_MAX_SEGMENTS_PER_REQUEST;
- blkdev->persistent_gnts = g_tree_new_full((GCompareDataFunc)int_cmp,
- NULL, NULL,
- batch_maps ?
- (GDestroyNotify)g_free :
- (GDestroyNotify)destroy_grant);
- blkdev->persistent_regions = NULL;
- blkdev->persistent_gnt_count = 0;
- }
-
blk_set_aio_context(blkdev->blk, blkdev->ctx);
- xen_be_bind_evtchn(&blkdev->xendev);
+ xen_be_bind_evtchn(xendev);
- xen_pv_printf(&blkdev->xendev, 1, "ok: proto %s, nr-ring-ref %u, "
+ xen_pv_printf(xendev, 1, "ok: proto %s, nr-ring-ref %u, "
"remote port %d, local port %d\n",
- blkdev->xendev.protocol, blkdev->nr_ring_ref,
- blkdev->xendev.remote_port, blkdev->xendev.local_port);
+ xendev->protocol, blkdev->nr_ring_ref,
+ xendev->remote_port, xendev->local_port);
return 0;
}
@@ -1339,41 +954,15 @@ static void blk_disconnect(struct XenDevice *xendev)
blk_unref(blkdev->blk);
blkdev->blk = NULL;
}
- xen_pv_unbind_evtchn(&blkdev->xendev);
+ xen_pv_unbind_evtchn(xendev);
aio_context_release(blkdev->ctx);
if (blkdev->sring) {
- xengnttab_unmap(blkdev->xendev.gnttabdev, blkdev->sring,
- blkdev->nr_ring_ref);
- blkdev->cnt_map--;
+ xen_be_unmap_grant_refs(xendev, blkdev->sring,
+ blkdev->nr_ring_ref);
blkdev->sring = NULL;
}
-
- /*
- * Unmap persistent grants before switching to the closed state
- * so the frontend can free them.
- *
- * In the !batch_maps case g_tree_destroy will take care of unmapping
- * the grant, but in the batch_maps case we need to iterate over every
- * region in persistent_regions and unmap it.
- */
- if (blkdev->feature_persistent) {
- g_tree_destroy(blkdev->persistent_gnts);
- assert(batch_maps || blkdev->persistent_gnt_count == 0);
- if (batch_maps) {
- blkdev->persistent_gnt_count = 0;
- g_slist_foreach(blkdev->persistent_regions,
- (GFunc)remove_persistent_region, blkdev);
- g_slist_free(blkdev->persistent_regions);
- }
- blkdev->feature_persistent = false;
- }
-
- if (blkdev->xendev.gnttabdev) {
- xengnttab_close(blkdev->xendev.gnttabdev);
- blkdev->xendev.gnttabdev = NULL;
- }
}
static int blk_free(struct XenDevice *xendev)
@@ -1410,10 +999,11 @@ static void blk_event(struct XenDevice *xendev)
}
struct XenDevOps xen_blkdev_ops = {
+ .flags = DEVOPS_FLAG_NEED_GNTDEV,
.size = sizeof(struct XenBlkDev),
.alloc = blk_alloc,
.init = blk_init,
- .initialise = blk_connect,
+ .initialise = blk_connect,
.disconnect = blk_disconnect,
.event = blk_event,
.free = blk_free,
generated by cgit v1.1 at 2024-08-18 16:41:36 +0000