diff options
author | RajithaY <rajithax.yerrumsetty@intel.com> | 2017-04-25 03:31:15 -0700 |
---|---|---|
committer | Rajitha Yerrumchetty <rajithax.yerrumsetty@intel.com> | 2017-05-22 06:48:08 +0000 |
commit | bb756eebdac6fd24e8919e2c43f7d2c8c4091f59 (patch) | |
tree | ca11e03542edf2d8f631efeca5e1626d211107e3 /qemu/block/commit.c | |
parent | a14b48d18a9ed03ec191cf16b162206998a895ce (diff) |
Adding qemu as a submodule of KVMFORNFV
This Patch includes the changes to add qemu as a submodule to
kvmfornfv repo and make use of the updated latest qemu for the
execution of all testcase
Change-Id: I1280af507a857675c7f81d30c95255635667bdd7
Signed-off-by:RajithaY<rajithax.yerrumsetty@intel.com>
Diffstat (limited to 'qemu/block/commit.c')
-rw-r--r-- | qemu/block/commit.c | 277 |
1 files changed, 0 insertions, 277 deletions
diff --git a/qemu/block/commit.c b/qemu/block/commit.c deleted file mode 100644 index cba0e8c1e..000000000 --- a/qemu/block/commit.c +++ /dev/null @@ -1,277 +0,0 @@ -/* - * Live block commit - * - * Copyright Red Hat, Inc. 2012 - * - * Authors: - * Jeff Cody <jcody@redhat.com> - * Based on stream.c by Stefan Hajnoczi - * - * This work is licensed under the terms of the GNU LGPL, version 2 or later. - * See the COPYING.LIB file in the top-level directory. - * - */ - -#include "qemu/osdep.h" -#include "trace.h" -#include "block/block_int.h" -#include "block/blockjob.h" -#include "qapi/error.h" -#include "qapi/qmp/qerror.h" -#include "qemu/ratelimit.h" -#include "sysemu/block-backend.h" - -enum { - /* - * Size of data buffer for populating the image file. This should be large - * enough to process multiple clusters in a single call, so that populating - * contiguous regions of the image is efficient. - */ - COMMIT_BUFFER_SIZE = 512 * 1024, /* in bytes */ -}; - -#define SLICE_TIME 100000000ULL /* ns */ - -typedef struct CommitBlockJob { - BlockJob common; - RateLimit limit; - BlockDriverState *active; - BlockDriverState *top; - BlockDriverState *base; - BlockdevOnError on_error; - int base_flags; - int orig_overlay_flags; - char *backing_file_str; -} CommitBlockJob; - -static int coroutine_fn commit_populate(BlockDriverState *bs, - BlockDriverState *base, - int64_t sector_num, int nb_sectors, - void *buf) -{ - int ret = 0; - - ret = bdrv_read(bs, sector_num, buf, nb_sectors); - if (ret) { - return ret; - } - - ret = bdrv_write(base, sector_num, buf, nb_sectors); - if (ret) { - return ret; - } - - return 0; -} - -typedef struct { - int ret; -} CommitCompleteData; - -static void commit_complete(BlockJob *job, void *opaque) -{ - CommitBlockJob *s = container_of(job, CommitBlockJob, common); - CommitCompleteData *data = opaque; - BlockDriverState *active = s->active; - BlockDriverState *top = s->top; - BlockDriverState *base = s->base; - BlockDriverState *overlay_bs; - int ret = data->ret; - - if (!block_job_is_cancelled(&s->common) && ret == 0) { - /* success */ - ret = bdrv_drop_intermediate(active, top, base, s->backing_file_str); - } - - /* restore base open flags here if appropriate (e.g., change the base back - * to r/o). These reopens do not need to be atomic, since we won't abort - * even on failure here */ - if (s->base_flags != bdrv_get_flags(base)) { - bdrv_reopen(base, s->base_flags, NULL); - } - overlay_bs = bdrv_find_overlay(active, top); - if (overlay_bs && s->orig_overlay_flags != bdrv_get_flags(overlay_bs)) { - bdrv_reopen(overlay_bs, s->orig_overlay_flags, NULL); - } - g_free(s->backing_file_str); - block_job_completed(&s->common, ret); - g_free(data); -} - -static void coroutine_fn commit_run(void *opaque) -{ - CommitBlockJob *s = opaque; - CommitCompleteData *data; - BlockDriverState *top = s->top; - BlockDriverState *base = s->base; - int64_t sector_num, end; - int ret = 0; - int n = 0; - void *buf = NULL; - int bytes_written = 0; - int64_t base_len; - - ret = s->common.len = bdrv_getlength(top); - - - if (s->common.len < 0) { - goto out; - } - - ret = base_len = bdrv_getlength(base); - if (base_len < 0) { - goto out; - } - - if (base_len < s->common.len) { - ret = bdrv_truncate(base, s->common.len); - if (ret) { - goto out; - } - } - - end = s->common.len >> BDRV_SECTOR_BITS; - buf = qemu_blockalign(top, COMMIT_BUFFER_SIZE); - - for (sector_num = 0; sector_num < end; sector_num += n) { - uint64_t delay_ns = 0; - bool copy; - -wait: - /* Note that even when no rate limit is applied we need to yield - * with no pending I/O here so that bdrv_drain_all() returns. - */ - block_job_sleep_ns(&s->common, QEMU_CLOCK_REALTIME, delay_ns); - if (block_job_is_cancelled(&s->common)) { - break; - } - /* Copy if allocated above the base */ - ret = bdrv_is_allocated_above(top, base, sector_num, - COMMIT_BUFFER_SIZE / BDRV_SECTOR_SIZE, - &n); - copy = (ret == 1); - trace_commit_one_iteration(s, sector_num, n, ret); - if (copy) { - if (s->common.speed) { - delay_ns = ratelimit_calculate_delay(&s->limit, n); - if (delay_ns > 0) { - goto wait; - } - } - ret = commit_populate(top, base, sector_num, n, buf); - bytes_written += n * BDRV_SECTOR_SIZE; - } - if (ret < 0) { - if (s->on_error == BLOCKDEV_ON_ERROR_STOP || - s->on_error == BLOCKDEV_ON_ERROR_REPORT|| - (s->on_error == BLOCKDEV_ON_ERROR_ENOSPC && ret == -ENOSPC)) { - goto out; - } else { - n = 0; - continue; - } - } - /* Publish progress */ - s->common.offset += n * BDRV_SECTOR_SIZE; - } - - ret = 0; - -out: - qemu_vfree(buf); - - data = g_malloc(sizeof(*data)); - data->ret = ret; - block_job_defer_to_main_loop(&s->common, commit_complete, data); -} - -static void commit_set_speed(BlockJob *job, int64_t speed, Error **errp) -{ - CommitBlockJob *s = container_of(job, CommitBlockJob, common); - - if (speed < 0) { - error_setg(errp, QERR_INVALID_PARAMETER, "speed"); - return; - } - ratelimit_set_speed(&s->limit, speed / BDRV_SECTOR_SIZE, SLICE_TIME); -} - -static const BlockJobDriver commit_job_driver = { - .instance_size = sizeof(CommitBlockJob), - .job_type = BLOCK_JOB_TYPE_COMMIT, - .set_speed = commit_set_speed, -}; - -void commit_start(BlockDriverState *bs, BlockDriverState *base, - BlockDriverState *top, int64_t speed, - BlockdevOnError on_error, BlockCompletionFunc *cb, - void *opaque, const char *backing_file_str, Error **errp) -{ - CommitBlockJob *s; - BlockReopenQueue *reopen_queue = NULL; - int orig_overlay_flags; - int orig_base_flags; - BlockDriverState *overlay_bs; - Error *local_err = NULL; - - if ((on_error == BLOCKDEV_ON_ERROR_STOP || - on_error == BLOCKDEV_ON_ERROR_ENOSPC) && - (!bs->blk || !blk_iostatus_is_enabled(bs->blk))) { - error_setg(errp, "Invalid parameter combination"); - return; - } - - assert(top != bs); - if (top == base) { - error_setg(errp, "Invalid files for merge: top and base are the same"); - return; - } - - overlay_bs = bdrv_find_overlay(bs, top); - - if (overlay_bs == NULL) { - error_setg(errp, "Could not find overlay image for %s:", top->filename); - return; - } - - orig_base_flags = bdrv_get_flags(base); - orig_overlay_flags = bdrv_get_flags(overlay_bs); - - /* convert base & overlay_bs to r/w, if necessary */ - if (!(orig_overlay_flags & BDRV_O_RDWR)) { - reopen_queue = bdrv_reopen_queue(reopen_queue, overlay_bs, NULL, - orig_overlay_flags | BDRV_O_RDWR); - } - if (!(orig_base_flags & BDRV_O_RDWR)) { - reopen_queue = bdrv_reopen_queue(reopen_queue, base, NULL, - orig_base_flags | BDRV_O_RDWR); - } - if (reopen_queue) { - bdrv_reopen_multiple(reopen_queue, &local_err); - if (local_err != NULL) { - error_propagate(errp, local_err); - return; - } - } - - - s = block_job_create(&commit_job_driver, bs, speed, cb, opaque, errp); - if (!s) { - return; - } - - s->base = base; - s->top = top; - s->active = bs; - - s->base_flags = orig_base_flags; - s->orig_overlay_flags = orig_overlay_flags; - - s->backing_file_str = g_strdup(backing_file_str); - - s->on_error = on_error; - s->common.co = qemu_coroutine_create(commit_run); - - trace_commit_start(bs, base, top, s, s->common.co, opaque); - qemu_coroutine_enter(s->common.co, s); -} |