diff options
Diffstat (limited to 'block')
| -rw-r--r-- | block/Makefile.objs | 1 | ||||
| -rw-r--r-- | block/backup-top.c | 4 | ||||
| -rw-r--r-- | block/blkdebug.c | 93 | ||||
| -rw-r--r-- | block/filter-compress.c | 168 | ||||
| -rw-r--r-- | block/qcow2-bitmap.c | 41 | ||||
| -rw-r--r-- | block/qcow2.c | 102 | ||||
| -rw-r--r-- | block/throttle-groups.c | 4 |
7 files changed, 358 insertions, 55 deletions
diff --git a/block/Makefile.objs b/block/Makefile.objs index e394fe0b6c..330529b0b7 100644 --- a/block/Makefile.objs +++ b/block/Makefile.objs @@ -43,6 +43,7 @@ block-obj-y += crypto.o block-obj-y += aio_task.o block-obj-y += backup-top.o +block-obj-y += filter-compress.o common-obj-y += stream.o diff --git a/block/backup-top.c b/block/backup-top.c index 7cdb1f8eba..818d3f26b4 100644 --- a/block/backup-top.c +++ b/block/backup-top.c @@ -257,12 +257,12 @@ void bdrv_backup_top_drop(BlockDriverState *bs) BDRVBackupTopState *s = bs->opaque; AioContext *aio_context = bdrv_get_aio_context(bs); - block_copy_state_free(s->bcs); - aio_context_acquire(aio_context); bdrv_drained_begin(bs); + block_copy_state_free(s->bcs); + s->active = false; bdrv_child_refresh_perms(bs, bs->backing, &error_abort); bdrv_replace_node(bs, backing_bs(bs), &error_abort); diff --git a/block/blkdebug.c b/block/blkdebug.c index 5ae96c52b0..af44aa973f 100644 --- a/block/blkdebug.c +++ b/block/blkdebug.c @@ -28,10 +28,14 @@ #include "qemu/cutils.h" #include "qemu/config-file.h" #include "block/block_int.h" +#include "block/qdict.h" #include "qemu/module.h" #include "qemu/option.h" +#include "qapi/qapi-visit-block-core.h" #include "qapi/qmp/qdict.h" +#include "qapi/qmp/qlist.h" #include "qapi/qmp/qstring.h" +#include "qapi/qobject-input-visitor.h" #include "sysemu/qtest.h" typedef struct BDRVBlkdebugState { @@ -44,6 +48,9 @@ typedef struct BDRVBlkdebugState { uint64_t opt_discard; uint64_t max_discard; + uint64_t take_child_perms; + uint64_t unshare_child_perms; + /* For blkdebug_refresh_filename() */ char *config_file; @@ -344,6 +351,69 @@ static void blkdebug_parse_filename(const char *filename, QDict *options, qdict_put_str(options, "x-image", filename); } +static int blkdebug_parse_perm_list(uint64_t *dest, QDict *options, + const char *prefix, Error **errp) +{ + int ret = 0; + QDict *subqdict = NULL; + QObject *crumpled_subqdict = NULL; + Visitor *v = NULL; + BlockPermissionList *perm_list = NULL, *element; + Error *local_err = NULL; + + *dest = 0; + + qdict_extract_subqdict(options, &subqdict, prefix); + if (!qdict_size(subqdict)) { + goto out; + } + + crumpled_subqdict = qdict_crumple(subqdict, errp); + if (!crumpled_subqdict) { + ret = -EINVAL; + goto out; + } + + v = qobject_input_visitor_new(crumpled_subqdict); + visit_type_BlockPermissionList(v, NULL, &perm_list, &local_err); + if (local_err) { + error_propagate(errp, local_err); + ret = -EINVAL; + goto out; + } + + for (element = perm_list; element; element = element->next) { + *dest |= bdrv_qapi_perm_to_blk_perm(element->value); + } + +out: + qapi_free_BlockPermissionList(perm_list); + visit_free(v); + qobject_unref(subqdict); + qobject_unref(crumpled_subqdict); + return ret; +} + +static int blkdebug_parse_perms(BDRVBlkdebugState *s, QDict *options, + Error **errp) +{ + int ret; + + ret = blkdebug_parse_perm_list(&s->take_child_perms, options, + "take-child-perms.", errp); + if (ret < 0) { + return ret; + } + + ret = blkdebug_parse_perm_list(&s->unshare_child_perms, options, + "unshare-child-perms.", errp); + if (ret < 0) { + return ret; + } + + return 0; +} + static QemuOptsList runtime_opts = { .name = "blkdebug", .head = QTAILQ_HEAD_INITIALIZER(runtime_opts.head), @@ -419,6 +489,12 @@ static int blkdebug_open(BlockDriverState *bs, QDict *options, int flags, /* Set initial state */ s->state = 1; + /* Parse permissions modifiers before opening the image file */ + ret = blkdebug_parse_perms(s, options, errp); + if (ret < 0) { + goto out; + } + /* Open the image file */ bs->file = bdrv_open_child(qemu_opt_get(opts, "x-image"), options, "image", bs, &child_file, false, &local_err); @@ -916,6 +992,21 @@ static int blkdebug_reopen_prepare(BDRVReopenState *reopen_state, return 0; } +static void blkdebug_child_perm(BlockDriverState *bs, BdrvChild *c, + const BdrvChildRole *role, + BlockReopenQueue *reopen_queue, + uint64_t perm, uint64_t shared, + uint64_t *nperm, uint64_t *nshared) +{ + BDRVBlkdebugState *s = bs->opaque; + + bdrv_filter_default_perms(bs, c, role, reopen_queue, perm, shared, + nperm, nshared); + + *nperm |= s->take_child_perms; + *nshared &= ~s->unshare_child_perms; +} + static const char *const blkdebug_strong_runtime_opts[] = { "config", "inject-error.", @@ -940,7 +1031,7 @@ static BlockDriver bdrv_blkdebug = { .bdrv_file_open = blkdebug_open, .bdrv_close = blkdebug_close, .bdrv_reopen_prepare = blkdebug_reopen_prepare, - .bdrv_child_perm = bdrv_filter_default_perms, + .bdrv_child_perm = blkdebug_child_perm, .bdrv_getlength = blkdebug_getlength, .bdrv_refresh_filename = blkdebug_refresh_filename, diff --git a/block/filter-compress.c b/block/filter-compress.c new file mode 100644 index 0000000000..60137fb680 --- /dev/null +++ b/block/filter-compress.c @@ -0,0 +1,168 @@ +/* + * Compress filter block driver + * + * Copyright (c) 2019 Virtuozzo International GmbH + * + * Author: + * Andrey Shinkevich <andrey.shinkevich@virtuozzo.com> + * (based on block/copy-on-read.c by Max Reitz) + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 or + * (at your option) any later version of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see <http://www.gnu.org/licenses/>. + */ + +#include "qemu/osdep.h" +#include "block/block_int.h" +#include "qemu/module.h" +#include "qapi/error.h" + + +static int compress_open(BlockDriverState *bs, QDict *options, int flags, + Error **errp) +{ + bs->file = bdrv_open_child(NULL, options, "file", bs, &child_file, false, + errp); + if (!bs->file) { + return -EINVAL; + } + + if (!bs->file->bs->drv || !block_driver_can_compress(bs->file->bs->drv)) { + error_setg(errp, + "Compression is not supported for underlying format: %s", + bdrv_get_format_name(bs->file->bs) ?: "(no format)"); + + return -ENOTSUP; + } + + bs->supported_write_flags = BDRV_REQ_WRITE_UNCHANGED | + (BDRV_REQ_FUA & bs->file->bs->supported_write_flags); + + bs->supported_zero_flags = BDRV_REQ_WRITE_UNCHANGED | + ((BDRV_REQ_FUA | BDRV_REQ_MAY_UNMAP | BDRV_REQ_NO_FALLBACK) & + bs->file->bs->supported_zero_flags); + + return 0; +} + + +static int64_t compress_getlength(BlockDriverState *bs) +{ + return bdrv_getlength(bs->file->bs); +} + + +static int coroutine_fn compress_co_preadv_part(BlockDriverState *bs, + uint64_t offset, uint64_t bytes, + QEMUIOVector *qiov, + size_t qiov_offset, + int flags) +{ + return bdrv_co_preadv_part(bs->file, offset, bytes, qiov, qiov_offset, + flags); +} + + +static int coroutine_fn compress_co_pwritev_part(BlockDriverState *bs, + uint64_t offset, + uint64_t bytes, + QEMUIOVector *qiov, + size_t qiov_offset, int flags) +{ + return bdrv_co_pwritev_part(bs->file, offset, bytes, qiov, qiov_offset, + flags | BDRV_REQ_WRITE_COMPRESSED); +} + + +static int coroutine_fn compress_co_pwrite_zeroes(BlockDriverState *bs, + int64_t offset, int bytes, + BdrvRequestFlags flags) +{ + return bdrv_co_pwrite_zeroes(bs->file, offset, bytes, flags); +} + + +static int coroutine_fn compress_co_pdiscard(BlockDriverState *bs, + int64_t offset, int bytes) +{ + return bdrv_co_pdiscard(bs->file, offset, bytes); +} + + +static void compress_refresh_limits(BlockDriverState *bs, Error **errp) +{ + BlockDriverInfo bdi; + int ret; + + if (!bs->file) { + return; + } + + ret = bdrv_get_info(bs->file->bs, &bdi); + if (ret < 0 || bdi.cluster_size == 0) { + return; + } + + bs->bl.request_alignment = bdi.cluster_size; +} + + +static void compress_eject(BlockDriverState *bs, bool eject_flag) +{ + bdrv_eject(bs->file->bs, eject_flag); +} + + +static void compress_lock_medium(BlockDriverState *bs, bool locked) +{ + bdrv_lock_medium(bs->file->bs, locked); +} + + +static bool compress_recurse_is_first_non_filter(BlockDriverState *bs, + BlockDriverState *candidate) +{ + return bdrv_recurse_is_first_non_filter(bs->file->bs, candidate); +} + + +static BlockDriver bdrv_compress = { + .format_name = "compress", + + .bdrv_open = compress_open, + .bdrv_child_perm = bdrv_filter_default_perms, + + .bdrv_getlength = compress_getlength, + + .bdrv_co_preadv_part = compress_co_preadv_part, + .bdrv_co_pwritev_part = compress_co_pwritev_part, + .bdrv_co_pwrite_zeroes = compress_co_pwrite_zeroes, + .bdrv_co_pdiscard = compress_co_pdiscard, + .bdrv_refresh_limits = compress_refresh_limits, + + .bdrv_eject = compress_eject, + .bdrv_lock_medium = compress_lock_medium, + + .bdrv_co_block_status = bdrv_co_block_status_from_file, + + .bdrv_recurse_is_first_non_filter = compress_recurse_is_first_non_filter, + + .has_variable_length = true, + .is_filter = true, +}; + +static void bdrv_compress_init(void) +{ + bdrv_register(&bdrv_compress); +} + +block_init(bdrv_compress_init); diff --git a/block/qcow2-bitmap.c b/block/qcow2-bitmap.c index c6c8ebbe89..d41f5d049b 100644 --- a/block/qcow2-bitmap.c +++ b/block/qcow2-bitmap.c @@ -1703,8 +1703,14 @@ bool coroutine_fn qcow2_co_can_store_new_dirty_bitmap(BlockDriverState *bs, Error **errp) { BDRVQcow2State *s = bs->opaque; - bool found; - Qcow2BitmapList *bm_list; + BdrvDirtyBitmap *bitmap; + uint64_t bitmap_directory_size = 0; + uint32_t nb_bitmaps = 0; + + if (bdrv_find_dirty_bitmap(bs, name)) { + error_setg(errp, "Bitmap already exists: %s", name); + return false; + } if (s->qcow_version < 3) { /* Without autoclear_features, we would always have to assume @@ -1720,38 +1726,27 @@ bool coroutine_fn qcow2_co_can_store_new_dirty_bitmap(BlockDriverState *bs, goto fail; } - if (s->nb_bitmaps == 0) { - return true; + FOR_EACH_DIRTY_BITMAP(bs, bitmap) { + if (bdrv_dirty_bitmap_get_persistence(bitmap)) { + nb_bitmaps++; + bitmap_directory_size += + calc_dir_entry_size(strlen(bdrv_dirty_bitmap_name(bitmap)), 0); + } } + nb_bitmaps++; + bitmap_directory_size += calc_dir_entry_size(strlen(name), 0); - if (s->nb_bitmaps >= QCOW2_MAX_BITMAPS) { + if (nb_bitmaps > QCOW2_MAX_BITMAPS) { error_setg(errp, "Maximum number of persistent bitmaps is already reached"); goto fail; } - if (s->bitmap_directory_size + calc_dir_entry_size(strlen(name), 0) > - QCOW2_MAX_BITMAP_DIRECTORY_SIZE) - { + if (bitmap_directory_size > QCOW2_MAX_BITMAP_DIRECTORY_SIZE) { error_setg(errp, "Not enough space in the bitmap directory"); goto fail; } - qemu_co_mutex_lock(&s->lock); - bm_list = bitmap_list_load(bs, s->bitmap_directory_offset, - s->bitmap_directory_size, errp); - qemu_co_mutex_unlock(&s->lock); - if (bm_list == NULL) { - goto fail; - } - - found = find_bitmap_by_name(bm_list, name); - bitmap_list_free(bm_list); - if (found) { - error_setg(errp, "Bitmap with the same name is already stored"); - goto fail; - } - return true; fail: diff --git a/block/qcow2.c b/block/qcow2.c index 7fbaac8457..cef9d72b3a 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -4221,10 +4221,8 @@ fail: return ret; } -/* XXX: put compressed sectors first, then all the cluster aligned - tables to avoid losing bytes in alignment */ static coroutine_fn int -qcow2_co_pwritev_compressed_part(BlockDriverState *bs, +qcow2_co_pwritev_compressed_task(BlockDriverState *bs, uint64_t offset, uint64_t bytes, QEMUIOVector *qiov, size_t qiov_offset) { @@ -4234,32 +4232,11 @@ qcow2_co_pwritev_compressed_part(BlockDriverState *bs, uint8_t *buf, *out_buf; uint64_t cluster_offset; - if (has_data_file(bs)) { - return -ENOTSUP; - } - - if (bytes == 0) { - /* align end of file to a sector boundary to ease reading with - sector based I/Os */ - int64_t len = bdrv_getlength(bs->file->bs); - if (len < 0) { - return len; - } - return bdrv_co_truncate(bs->file, len, false, PREALLOC_MODE_OFF, NULL); - } - - if (offset_into_cluster(s, offset)) { - return -EINVAL; - } + assert(bytes == s->cluster_size || (bytes < s->cluster_size && + (offset + bytes == bs->total_sectors << BDRV_SECTOR_BITS))); buf = qemu_blockalign(bs, s->cluster_size); - if (bytes != s->cluster_size) { - if (bytes > s->cluster_size || - offset + bytes != bs->total_sectors << BDRV_SECTOR_BITS) - { - qemu_vfree(buf); - return -EINVAL; - } + if (bytes < s->cluster_size) { /* Zero-pad last write if image size is not cluster aligned */ memset(buf + bytes, 0, s->cluster_size - bytes); } @@ -4308,6 +4285,77 @@ fail: return ret; } +static coroutine_fn int qcow2_co_pwritev_compressed_task_entry(AioTask *task) +{ + Qcow2AioTask *t = container_of(task, Qcow2AioTask, task); + + assert(!t->cluster_type && !t->l2meta); + + return qcow2_co_pwritev_compressed_task(t->bs, t->offset, t->bytes, t->qiov, + t->qiov_offset); +} + +/* + * XXX: put compressed sectors first, then all the cluster aligned + * tables to avoid losing bytes in alignment + */ +static coroutine_fn int +qcow2_co_pwritev_compressed_part(BlockDriverState *bs, + uint64_t offset, uint64_t bytes, + QEMUIOVector *qiov, size_t qiov_offset) +{ + BDRVQcow2State *s = bs->opaque; + AioTaskPool *aio = NULL; + int ret = 0; + + if (has_data_file(bs)) { + return -ENOTSUP; + } + + if (bytes == 0) { + /* + * align end of file to a sector boundary to ease reading with + * sector based I/Os + */ + int64_t len = bdrv_getlength(bs->file->bs); + if (len < 0) { + return len; + } + return bdrv_co_truncate(bs->file, len, false, PREALLOC_MODE_OFF, NULL); + } + + if (offset_into_cluster(s, offset)) { + return -EINVAL; + } + + while (bytes && aio_task_pool_status(aio) == 0) { + uint64_t chunk_size = MIN(bytes, s->cluster_size); + + if (!aio && chunk_size != bytes) { + aio = aio_task_pool_new(QCOW2_MAX_WORKERS); + } + + ret = qcow2_add_task(bs, aio, qcow2_co_pwritev_compressed_task_entry, + 0, 0, offset, chunk_size, qiov, qiov_offset, NULL); + if (ret < 0) { + break; + } + qiov_offset += chunk_size; + offset += chunk_size; + bytes -= chunk_size; + } + + if (aio) { + aio_task_pool_wait_all(aio); + if (ret == 0) { + ret = aio_task_pool_status(aio); + } + g_free(aio); + } + + return ret; +} + static int coroutine_fn qcow2_co_preadv_compressed(BlockDriverState *bs, uint64_t file_cluster_offset, diff --git a/block/throttle-groups.c b/block/throttle-groups.c index 77014c741b..37695b0cd7 100644 --- a/block/throttle-groups.c +++ b/block/throttle-groups.c @@ -893,8 +893,7 @@ static void throttle_group_set_limits(Object *obj, Visitor *v, { ThrottleGroup *tg = THROTTLE_GROUP(obj); ThrottleConfig cfg; - ThrottleLimits arg = { 0 }; - ThrottleLimits *argp = &arg; + ThrottleLimits *argp; Error *local_err = NULL; visit_type_ThrottleLimits(v, name, &argp, &local_err); @@ -912,6 +911,7 @@ static void throttle_group_set_limits(Object *obj, Visitor *v, unlock: qemu_mutex_unlock(&tg->lock); ret: + qapi_free_ThrottleLimits(argp); error_propagate(errp, local_err); return; } |