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-rw-r--r--fsdev/Makefile.objs2
-rw-r--r--fsdev/file-op-9p.h3
-rw-r--r--fsdev/qemu-fsdev-opts.c77
-rw-r--r--fsdev/qemu-fsdev-throttle.c118
-rw-r--r--fsdev/qemu-fsdev-throttle.h39
5 files changed, 237 insertions, 2 deletions
diff --git a/fsdev/Makefile.objs b/fsdev/Makefile.objs
index 1b120a4a7d..659df6e187 100644
--- a/fsdev/Makefile.objs
+++ b/fsdev/Makefile.objs
@@ -5,7 +5,7 @@ common-obj-y = qemu-fsdev.o 9p-marshal.o 9p-iov-marshal.o
else
common-obj-y = qemu-fsdev-dummy.o
endif
-common-obj-y += qemu-fsdev-opts.o
+common-obj-y += qemu-fsdev-opts.o qemu-fsdev-throttle.o
# Toplevel always builds this; targets without virtio will put it in
# common-obj-y
diff --git a/fsdev/file-op-9p.h b/fsdev/file-op-9p.h
index a56dc8488d..0844a403dc 100644
--- a/fsdev/file-op-9p.h
+++ b/fsdev/file-op-9p.h
@@ -17,6 +17,7 @@
#include <dirent.h>
#include <utime.h>
#include <sys/vfs.h>
+#include "qemu-fsdev-throttle.h"
#define SM_LOCAL_MODE_BITS 0600
#define SM_LOCAL_DIR_MODE_BITS 0700
@@ -74,6 +75,7 @@ typedef struct FsDriverEntry {
char *path;
int export_flags;
FileOperations *ops;
+ FsThrottle fst;
} FsDriverEntry;
typedef struct FsContext
@@ -83,6 +85,7 @@ typedef struct FsContext
int export_flags;
struct xattr_operations **xops;
struct extended_ops exops;
+ FsThrottle *fst;
/* fs driver specific data */
void *private;
} FsContext;
diff --git a/fsdev/qemu-fsdev-opts.c b/fsdev/qemu-fsdev-opts.c
index 1dd8c7a24c..385423f02d 100644
--- a/fsdev/qemu-fsdev-opts.c
+++ b/fsdev/qemu-fsdev-opts.c
@@ -37,8 +37,83 @@ static QemuOptsList qemu_fsdev_opts = {
}, {
.name = "sock_fd",
.type = QEMU_OPT_NUMBER,
+ }, {
+ .name = "throttling.iops-total",
+ .type = QEMU_OPT_NUMBER,
+ .help = "limit total I/O operations per second",
+ }, {
+ .name = "throttling.iops-read",
+ .type = QEMU_OPT_NUMBER,
+ .help = "limit read operations per second",
+ }, {
+ .name = "throttling.iops-write",
+ .type = QEMU_OPT_NUMBER,
+ .help = "limit write operations per second",
+ }, {
+ .name = "throttling.bps-total",
+ .type = QEMU_OPT_NUMBER,
+ .help = "limit total bytes per second",
+ }, {
+ .name = "throttling.bps-read",
+ .type = QEMU_OPT_NUMBER,
+ .help = "limit read bytes per second",
+ }, {
+ .name = "throttling.bps-write",
+ .type = QEMU_OPT_NUMBER,
+ .help = "limit write bytes per second",
+ }, {
+ .name = "throttling.iops-total-max",
+ .type = QEMU_OPT_NUMBER,
+ .help = "I/O operations burst",
+ }, {
+ .name = "throttling.iops-read-max",
+ .type = QEMU_OPT_NUMBER,
+ .help = "I/O operations read burst",
+ }, {
+ .name = "throttling.iops-write-max",
+ .type = QEMU_OPT_NUMBER,
+ .help = "I/O operations write burst",
+ }, {
+ .name = "throttling.bps-total-max",
+ .type = QEMU_OPT_NUMBER,
+ .help = "total bytes burst",
+ }, {
+ .name = "throttling.bps-read-max",
+ .type = QEMU_OPT_NUMBER,
+ .help = "total bytes read burst",
+ }, {
+ .name = "throttling.bps-write-max",
+ .type = QEMU_OPT_NUMBER,
+ .help = "total bytes write burst",
+ }, {
+ .name = "throttling.iops-total-max-length",
+ .type = QEMU_OPT_NUMBER,
+ .help = "length of the iops-total-max burst period, in seconds",
+ }, {
+ .name = "throttling.iops-read-max-length",
+ .type = QEMU_OPT_NUMBER,
+ .help = "length of the iops-read-max burst period, in seconds",
+ }, {
+ .name = "throttling.iops-write-max-length",
+ .type = QEMU_OPT_NUMBER,
+ .help = "length of the iops-write-max burst period, in seconds",
+ }, {
+ .name = "throttling.bps-total-max-length",
+ .type = QEMU_OPT_NUMBER,
+ .help = "length of the bps-total-max burst period, in seconds",
+ }, {
+ .name = "throttling.bps-read-max-length",
+ .type = QEMU_OPT_NUMBER,
+ .help = "length of the bps-read-max burst period, in seconds",
+ }, {
+ .name = "throttling.bps-write-max-length",
+ .type = QEMU_OPT_NUMBER,
+ .help = "length of the bps-write-max burst period, in seconds",
+ }, {
+ .name = "throttling.iops-size",
+ .type = QEMU_OPT_NUMBER,
+ .help = "when limiting by iops max size of an I/O in bytes",
},
-
{ /*End of list */ }
},
};
diff --git a/fsdev/qemu-fsdev-throttle.c b/fsdev/qemu-fsdev-throttle.c
new file mode 100644
index 0000000000..7ae4e86646
--- /dev/null
+++ b/fsdev/qemu-fsdev-throttle.c
@@ -0,0 +1,118 @@
+/*
+ * Fsdev Throttle
+ *
+ * Copyright (C) 2016 Huawei Technologies Duesseldorf GmbH
+ *
+ * Author: Pradeep Jagadeesh <pradeep.jagadeesh@huawei.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or
+ * (at your option) any later version.
+ *
+ * See the COPYING file in the top-level directory for details.
+ *
+ */
+
+#include "qemu/osdep.h"
+#include "qemu/error-report.h"
+#include "qemu-fsdev-throttle.h"
+#include "qemu/iov.h"
+
+static void fsdev_throttle_read_timer_cb(void *opaque)
+{
+ FsThrottle *fst = opaque;
+ qemu_co_enter_next(&fst->throttled_reqs[false]);
+}
+
+static void fsdev_throttle_write_timer_cb(void *opaque)
+{
+ FsThrottle *fst = opaque;
+ qemu_co_enter_next(&fst->throttled_reqs[true]);
+}
+
+void fsdev_throttle_parse_opts(QemuOpts *opts, FsThrottle *fst, Error **errp)
+{
+ throttle_config_init(&fst->cfg);
+ fst->cfg.buckets[THROTTLE_BPS_TOTAL].avg =
+ qemu_opt_get_number(opts, "throttling.bps-total", 0);
+ fst->cfg.buckets[THROTTLE_BPS_READ].avg =
+ qemu_opt_get_number(opts, "throttling.bps-read", 0);
+ fst->cfg.buckets[THROTTLE_BPS_WRITE].avg =
+ qemu_opt_get_number(opts, "throttling.bps-write", 0);
+ fst->cfg.buckets[THROTTLE_OPS_TOTAL].avg =
+ qemu_opt_get_number(opts, "throttling.iops-total", 0);
+ fst->cfg.buckets[THROTTLE_OPS_READ].avg =
+ qemu_opt_get_number(opts, "throttling.iops-read", 0);
+ fst->cfg.buckets[THROTTLE_OPS_WRITE].avg =
+ qemu_opt_get_number(opts, "throttling.iops-write", 0);
+
+ fst->cfg.buckets[THROTTLE_BPS_TOTAL].max =
+ qemu_opt_get_number(opts, "throttling.bps-total-max", 0);
+ fst->cfg.buckets[THROTTLE_BPS_READ].max =
+ qemu_opt_get_number(opts, "throttling.bps-read-max", 0);
+ fst->cfg.buckets[THROTTLE_BPS_WRITE].max =
+ qemu_opt_get_number(opts, "throttling.bps-write-max", 0);
+ fst->cfg.buckets[THROTTLE_OPS_TOTAL].max =
+ qemu_opt_get_number(opts, "throttling.iops-total-max", 0);
+ fst->cfg.buckets[THROTTLE_OPS_READ].max =
+ qemu_opt_get_number(opts, "throttling.iops-read-max", 0);
+ fst->cfg.buckets[THROTTLE_OPS_WRITE].max =
+ qemu_opt_get_number(opts, "throttling.iops-write-max", 0);
+
+ fst->cfg.buckets[THROTTLE_BPS_TOTAL].burst_length =
+ qemu_opt_get_number(opts, "throttling.bps-total-max-length", 1);
+ fst->cfg.buckets[THROTTLE_BPS_READ].burst_length =
+ qemu_opt_get_number(opts, "throttling.bps-read-max-length", 1);
+ fst->cfg.buckets[THROTTLE_BPS_WRITE].burst_length =
+ qemu_opt_get_number(opts, "throttling.bps-write-max-length", 1);
+ fst->cfg.buckets[THROTTLE_OPS_TOTAL].burst_length =
+ qemu_opt_get_number(opts, "throttling.iops-total-max-length", 1);
+ fst->cfg.buckets[THROTTLE_OPS_READ].burst_length =
+ qemu_opt_get_number(opts, "throttling.iops-read-max-length", 1);
+ fst->cfg.buckets[THROTTLE_OPS_WRITE].burst_length =
+ qemu_opt_get_number(opts, "throttling.iops-write-max-length", 1);
+ fst->cfg.op_size =
+ qemu_opt_get_number(opts, "throttling.iops-size", 0);
+
+ throttle_is_valid(&fst->cfg, errp);
+}
+
+void fsdev_throttle_init(FsThrottle *fst)
+{
+ if (throttle_enabled(&fst->cfg)) {
+ throttle_init(&fst->ts);
+ throttle_timers_init(&fst->tt,
+ qemu_get_aio_context(),
+ QEMU_CLOCK_REALTIME,
+ fsdev_throttle_read_timer_cb,
+ fsdev_throttle_write_timer_cb,
+ fst);
+ throttle_config(&fst->ts, &fst->tt, &fst->cfg);
+ qemu_co_queue_init(&fst->throttled_reqs[0]);
+ qemu_co_queue_init(&fst->throttled_reqs[1]);
+ }
+}
+
+void coroutine_fn fsdev_co_throttle_request(FsThrottle *fst, bool is_write,
+ struct iovec *iov, int iovcnt)
+{
+ if (throttle_enabled(&fst->cfg)) {
+ if (throttle_schedule_timer(&fst->ts, &fst->tt, is_write) ||
+ !qemu_co_queue_empty(&fst->throttled_reqs[is_write])) {
+ qemu_co_queue_wait(&fst->throttled_reqs[is_write], NULL);
+ }
+
+ throttle_account(&fst->ts, is_write, iov_size(iov, iovcnt));
+
+ if (!qemu_co_queue_empty(&fst->throttled_reqs[is_write]) &&
+ !throttle_schedule_timer(&fst->ts, &fst->tt, is_write)) {
+ qemu_co_queue_next(&fst->throttled_reqs[is_write]);
+ }
+ }
+}
+
+void fsdev_throttle_cleanup(FsThrottle *fst)
+{
+ if (throttle_enabled(&fst->cfg)) {
+ throttle_timers_destroy(&fst->tt);
+ }
+}
diff --git a/fsdev/qemu-fsdev-throttle.h b/fsdev/qemu-fsdev-throttle.h
new file mode 100644
index 0000000000..e418643ccb
--- /dev/null
+++ b/fsdev/qemu-fsdev-throttle.h
@@ -0,0 +1,39 @@
+/*
+ * Fsdev Throttle
+ *
+ * Copyright (C) 2016 Huawei Technologies Duesseldorf GmbH
+ *
+ * Author: Pradeep Jagadeesh <pradeep.jagadeesh@huawei.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or
+ * (at your option) any later version.
+ *
+ * See the COPYING file in the top-level directory for details.
+ *
+ */
+
+#ifndef _FSDEV_THROTTLE_H
+#define _FSDEV_THROTTLE_H
+
+#include "block/aio.h"
+#include "qemu/main-loop.h"
+#include "qemu/coroutine.h"
+#include "qapi/error.h"
+#include "qemu/throttle.h"
+
+typedef struct FsThrottle {
+ ThrottleState ts;
+ ThrottleTimers tt;
+ ThrottleConfig cfg;
+ CoQueue throttled_reqs[2];
+} FsThrottle;
+
+void fsdev_throttle_parse_opts(QemuOpts *, FsThrottle *, Error **);
+
+void fsdev_throttle_init(FsThrottle *);
+
+void coroutine_fn fsdev_co_throttle_request(FsThrottle *, bool ,
+ struct iovec *, int);
+
+void fsdev_throttle_cleanup(FsThrottle *);
+#endif /* _FSDEV_THROTTLE_H */
generated by cgit v1.2.1 (git 2.18.0) at 2024-05-19 04:12:58 +0000