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SUSE:SLE-12-SP5:GA
qemu-linux-user.20361
0222-block-Allow-BDRV_REQ_FUA-through-bl.patch
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File 0222-block-Allow-BDRV_REQ_FUA-through-bl.patch of Package qemu-linux-user.20361
From: Eric Blake <eblake@redhat.com> Date: Fri, 6 May 2016 10:26:27 -0600 Subject: block: Allow BDRV_REQ_FUA through blk_pwrite() We have several block drivers that understand BDRV_REQ_FUA, and emulate it in the block layer for the rest by a full flush. But without a way to actually request BDRV_REQ_FUA during a pass-through blk_pwrite(), FUA-aware block drivers like NBD are forced to repeat the emulation logic of a full flush regardless of whether the backend they are writing to could do it more efficiently. This patch just wires up a flags argument; followup patches will actually make use of it in the NBD driver and in qemu-io. Signed-off-by: Eric Blake <eblake@redhat.com> Acked-by: Denis V. Lunev <den@openvz.org> Signed-off-by: Kevin Wolf <kwolf@redhat.com> (cherry picked from commit 8341f00dc207b80a1b2e7c7784890c9b0446d062) [LM: BSC#1043176] Signed-off-by: Lin Ma <lma@suse.com> --- block/block-backend.c | 6 ++++-- block/crypto.c | 2 +- block/parallels.c | 2 +- block/qcow.c | 8 ++++---- block/qcow2.c | 4 ++-- block/qed.c | 6 +++--- block/sheepdog.c | 2 +- block/vdi.c | 4 ++-- block/vhdx.c | 5 +++-- block/vmdk.c | 10 +++++----- block/vpc.c | 10 +++++----- hw/nvram/spapr_nvram.c | 4 ++-- include/sysemu/block-backend.h | 3 ++- nbd/server.c | 2 +- qemu-io-cmds.c | 2 +- 15 files changed, 37 insertions(+), 33 deletions(-) diff --git a/block/block-backend.c b/block/block-backend.c index db350d7b64155b1fee726317e889..f43499622a0092dc779b4caf10a9 100644 --- a/block/block-backend.c +++ b/block/block-backend.c @@ -955,9 +955,11 @@ int blk_pread(BlockBackend *blk, int64_t offset, void *buf, int count) return count; } -int blk_pwrite(BlockBackend *blk, int64_t offset, const void *buf, int count) +int blk_pwrite(BlockBackend *blk, int64_t offset, const void *buf, int count, + BdrvRequestFlags flags) { - int ret = blk_prw(blk, offset, (void*) buf, count, blk_write_entry, 0); + int ret = blk_prw(blk, offset, (void *) buf, count, blk_write_entry, + flags); if (ret < 0) { return ret; } diff --git a/block/crypto.c b/block/crypto.c index 1903e84fbd8584b0a7a999cf4d1a..32ba17ce003a60c7fe081ab7b644 100644 --- a/block/crypto.c +++ b/block/crypto.c @@ -91,7 +91,7 @@ static ssize_t block_crypto_write_func(QCryptoBlock *block, struct BlockCryptoCreateData *data = opaque; ssize_t ret; - ret = blk_pwrite(data->blk, offset, buf, buflen); + ret = blk_pwrite(data->blk, offset, buf, buflen, 0); if (ret < 0) { error_setg_errno(errp, -ret, "Could not write encryption header"); return ret; diff --git a/block/parallels.c b/block/parallels.c index 324ed43ac43d8f835156164e30b3..2d8bc87e477ed70078e581099dd8 100644 --- a/block/parallels.c +++ b/block/parallels.c @@ -512,7 +512,7 @@ static int parallels_create(const char *filename, QemuOpts *opts, Error **errp) memset(tmp, 0, sizeof(tmp)); memcpy(tmp, &header, sizeof(header)); - ret = blk_pwrite(file, 0, tmp, BDRV_SECTOR_SIZE); + ret = blk_pwrite(file, 0, tmp, BDRV_SECTOR_SIZE, 0); if (ret < 0) { goto exit; } diff --git a/block/qcow.c b/block/qcow.c index 60ddb12eca3b67acdeab697cad0f..d6dc1b05b37cfa9be4e102a28cd6 100644 --- a/block/qcow.c +++ b/block/qcow.c @@ -853,14 +853,14 @@ static int qcow_create(const char *filename, QemuOpts *opts, Error **errp) } /* write all the data */ - ret = blk_pwrite(qcow_blk, 0, &header, sizeof(header)); + ret = blk_pwrite(qcow_blk, 0, &header, sizeof(header), 0); if (ret != sizeof(header)) { goto exit; } if (backing_file) { ret = blk_pwrite(qcow_blk, sizeof(header), - backing_file, backing_filename_len); + backing_file, backing_filename_len, 0); if (ret != backing_filename_len) { goto exit; } @@ -869,8 +869,8 @@ static int qcow_create(const char *filename, QemuOpts *opts, Error **errp) tmp = g_malloc0(BDRV_SECTOR_SIZE); for (i = 0; i < ((sizeof(uint64_t)*l1_size + BDRV_SECTOR_SIZE - 1)/ BDRV_SECTOR_SIZE); i++) { - ret = blk_pwrite(qcow_blk, header_size + - BDRV_SECTOR_SIZE*i, tmp, BDRV_SECTOR_SIZE); + ret = blk_pwrite(qcow_blk, header_size + BDRV_SECTOR_SIZE * i, + tmp, BDRV_SECTOR_SIZE, 0); if (ret != BDRV_SECTOR_SIZE) { g_free(tmp); goto exit; diff --git a/block/qcow2.c b/block/qcow2.c index dc609a1aff3c0c637e906d5ef6b1..976fde67ddce19bf41227101933c 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -2207,7 +2207,7 @@ static int qcow2_create2(const char *filename, int64_t total_size, cpu_to_be64(QCOW2_COMPAT_LAZY_REFCOUNTS); } - ret = blk_pwrite(blk, 0, header, cluster_size); + ret = blk_pwrite(blk, 0, header, cluster_size, 0); g_free(header); if (ret < 0) { error_setg_errno(errp, -ret, "Could not write qcow2 header"); @@ -2217,7 +2217,7 @@ static int qcow2_create2(const char *filename, int64_t total_size, /* Write a refcount table with one refcount block */ refcount_table = g_malloc0(2 * cluster_size); refcount_table[0] = cpu_to_be64(2 * cluster_size); - ret = blk_pwrite(blk, cluster_size, refcount_table, 2 * cluster_size); + ret = blk_pwrite(blk, cluster_size, refcount_table, 2 * cluster_size, 0); g_free(refcount_table); if (ret < 0) { diff --git a/block/qed.c b/block/qed.c index 0af52741dfc37672280f0e132b88..6cfd4c1c113c4dbb4a268ac57990 100644 --- a/block/qed.c +++ b/block/qed.c @@ -601,18 +601,18 @@ static int qed_create(const char *filename, uint32_t cluster_size, } qed_header_cpu_to_le(&header, &le_header); - ret = blk_pwrite(blk, 0, &le_header, sizeof(le_header)); + ret = blk_pwrite(blk, 0, &le_header, sizeof(le_header), 0); if (ret < 0) { goto out; } ret = blk_pwrite(blk, sizeof(le_header), backing_file, - header.backing_filename_size); + header.backing_filename_size, 0); if (ret < 0) { goto out; } l1_table = g_malloc0(l1_size); - ret = blk_pwrite(blk, header.l1_table_offset, l1_table, l1_size); + ret = blk_pwrite(blk, header.l1_table_offset, l1_table, l1_size, 0); if (ret < 0) { goto out; } diff --git a/block/sheepdog.c b/block/sheepdog.c index 33e0a338246b74e92665642d5b79..625f876be60ce549b3931a04aeb9 100644 --- a/block/sheepdog.c +++ b/block/sheepdog.c @@ -1678,7 +1678,7 @@ static int sd_prealloc(const char *filename, Error **errp) if (ret < 0) { goto out; } - ret = blk_pwrite(blk, idx * buf_size, buf, buf_size); + ret = blk_pwrite(blk, idx * buf_size, buf, buf_size, 0); if (ret < 0) { goto out; } diff --git a/block/vdi.c b/block/vdi.c index 75d4819edb873b040a0a2daec35a..12ab3a64d8b84bd8b416507c7275 100644 --- a/block/vdi.c +++ b/block/vdi.c @@ -808,7 +808,7 @@ static int vdi_create(const char *filename, QemuOpts *opts, Error **errp) vdi_header_print(&header); #endif vdi_header_to_le(&header); - ret = blk_pwrite(blk, offset, &header, sizeof(header)); + ret = blk_pwrite(blk, offset, &header, sizeof(header), 0); if (ret < 0) { error_setg(errp, "Error writing header to %s", filename); goto exit; @@ -829,7 +829,7 @@ static int vdi_create(const char *filename, QemuOpts *opts, Error **errp) bmap[i] = VDI_UNALLOCATED; } } - ret = blk_pwrite(blk, offset, bmap, bmap_size); + ret = blk_pwrite(blk, offset, bmap, bmap_size, 0); if (ret < 0) { error_setg(errp, "Error writing bmap to %s", filename); goto exit; diff --git a/block/vhdx.c b/block/vhdx.c index 2b7b332404a1de64e7740d5dad09..ec778fe2a77dd06eb2e183cbb94f 100644 --- a/block/vhdx.c +++ b/block/vhdx.c @@ -1856,13 +1856,14 @@ static int vhdx_create(const char *filename, QemuOpts *opts, Error **errp) creator = g_utf8_to_utf16("QEMU v" QEMU_VERSION, -1, NULL, &creator_items, NULL); signature = cpu_to_le64(VHDX_FILE_SIGNATURE); - ret = blk_pwrite(blk, VHDX_FILE_ID_OFFSET, &signature, sizeof(signature)); + ret = blk_pwrite(blk, VHDX_FILE_ID_OFFSET, &signature, sizeof(signature), + 0); if (ret < 0) { goto delete_and_exit; } if (creator) { ret = blk_pwrite(blk, VHDX_FILE_ID_OFFSET + sizeof(signature), - creator, creator_items * sizeof(gunichar2)); + creator, creator_items * sizeof(gunichar2), 0); if (ret < 0) { goto delete_and_exit; } diff --git a/block/vmdk.c b/block/vmdk.c index ddc24dfe836a0330aa9c5db797ef..86b25621e286410fc6a1db7313b8 100644 --- a/block/vmdk.c +++ b/block/vmdk.c @@ -1728,12 +1728,12 @@ static int vmdk_create_extent(const char *filename, int64_t filesize, header.check_bytes[3] = 0xa; /* write all the data */ - ret = blk_pwrite(blk, 0, &magic, sizeof(magic)); + ret = blk_pwrite(blk, 0, &magic, sizeof(magic), 0); if (ret < 0) { error_setg(errp, QERR_IO_ERROR); goto exit; } - ret = blk_pwrite(blk, sizeof(magic), &header, sizeof(header)); + ret = blk_pwrite(blk, sizeof(magic), &header, sizeof(header), 0); if (ret < 0) { error_setg(errp, QERR_IO_ERROR); goto exit; @@ -1753,7 +1753,7 @@ static int vmdk_create_extent(const char *filename, int64_t filesize, gd_buf[i] = cpu_to_le32(tmp); } ret = blk_pwrite(blk, le64_to_cpu(header.rgd_offset) * BDRV_SECTOR_SIZE, - gd_buf, gd_buf_size); + gd_buf, gd_buf_size, 0); if (ret < 0) { error_setg(errp, QERR_IO_ERROR); goto exit; @@ -1765,7 +1765,7 @@ static int vmdk_create_extent(const char *filename, int64_t filesize, gd_buf[i] = cpu_to_le32(tmp); } ret = blk_pwrite(blk, le64_to_cpu(header.gd_offset) * BDRV_SECTOR_SIZE, - gd_buf, gd_buf_size); + gd_buf, gd_buf_size, 0); if (ret < 0) { error_setg(errp, QERR_IO_ERROR); goto exit; @@ -2031,7 +2031,7 @@ static int vmdk_create(const char *filename, QemuOpts *opts, Error **errp) blk_set_allow_write_beyond_eof(new_blk, true); - ret = blk_pwrite(new_blk, desc_offset, desc, desc_len); + ret = blk_pwrite(new_blk, desc_offset, desc, desc_len, 0); if (ret < 0) { error_setg_errno(errp, -ret, "Could not write description"); goto exit; diff --git a/block/vpc.c b/block/vpc.c index 3e2ea698d979846613cc7cf94899..a55a3e422ae48c0987c9ed15901b 100644 --- a/block/vpc.c +++ b/block/vpc.c @@ -783,13 +783,13 @@ static int create_dynamic_disk(BlockBackend *blk, uint8_t *buf, block_size = 0x200000; num_bat_entries = (total_sectors + block_size / 512) / (block_size / 512); - ret = blk_pwrite(blk, offset, buf, HEADER_SIZE); + ret = blk_pwrite(blk, offset, buf, HEADER_SIZE, 0); if (ret < 0) { goto fail; } offset = 1536 + ((num_bat_entries * 4 + 511) & ~511); - ret = blk_pwrite(blk, offset, buf, HEADER_SIZE); + ret = blk_pwrite(blk, offset, buf, HEADER_SIZE, 0); if (ret < 0) { goto fail; } @@ -799,7 +799,7 @@ static int create_dynamic_disk(BlockBackend *blk, uint8_t *buf, memset(buf, 0xFF, 512); for (i = 0; i < (num_bat_entries * 4 + 511) / 512; i++) { - ret = blk_pwrite(blk, offset, buf, 512); + ret = blk_pwrite(blk, offset, buf, 512, 0); if (ret < 0) { goto fail; } @@ -826,7 +826,7 @@ static int create_dynamic_disk(BlockBackend *blk, uint8_t *buf, /* Write the header */ offset = 512; - ret = blk_pwrite(blk, offset, buf, 1024); + ret = blk_pwrite(blk, offset, buf, 1024, 0); if (ret < 0) { goto fail; } @@ -848,7 +848,7 @@ static int create_fixed_disk(BlockBackend *blk, uint8_t *buf, return ret; } - ret = blk_pwrite(blk, total_size - HEADER_SIZE, buf, HEADER_SIZE); + ret = blk_pwrite(blk, total_size - HEADER_SIZE, buf, HEADER_SIZE, 0); if (ret < 0) { return ret; } diff --git a/hw/nvram/spapr_nvram.c b/hw/nvram/spapr_nvram.c index 802636ef3570c559fdc17f6fe42f..019f25dc581a8437a1edc0d3f93b 100644 --- a/hw/nvram/spapr_nvram.c +++ b/hw/nvram/spapr_nvram.c @@ -124,7 +124,7 @@ static void rtas_nvram_store(PowerPCCPU *cpu, sPAPRMachineState *spapr, alen = len; if (nvram->blk) { - alen = blk_pwrite(nvram->blk, offset, membuf, len); + alen = blk_pwrite(nvram->blk, offset, membuf, len, 0); } assert(nvram->buf); @@ -190,7 +190,7 @@ static int spapr_nvram_post_load(void *opaque, int version_id) sPAPRNVRAM *nvram = VIO_SPAPR_NVRAM(opaque); if (nvram->blk) { - int alen = blk_pwrite(nvram->blk, 0, nvram->buf, nvram->size); + int alen = blk_pwrite(nvram->blk, 0, nvram->buf, nvram->size, 0); if (alen < 0) { return alen; diff --git a/include/sysemu/block-backend.h b/include/sysemu/block-backend.h index f22b58c06802fa779f6c0d5e370d..bb33458f5fb0cece4c9580795124 100644 --- a/include/sysemu/block-backend.h +++ b/include/sysemu/block-backend.h @@ -102,7 +102,8 @@ BlockAIOCB *blk_aio_write_zeroes(BlockBackend *blk, int64_t sector_num, int nb_sectors, BdrvRequestFlags flags, BlockCompletionFunc *cb, void *opaque); int blk_pread(BlockBackend *blk, int64_t offset, void *buf, int count); -int blk_pwrite(BlockBackend *blk, int64_t offset, const void *buf, int count); +int blk_pwrite(BlockBackend *blk, int64_t offset, const void *buf, int count, + BdrvRequestFlags flags); int64_t blk_getlength(BlockBackend *blk); void blk_get_geometry(BlockBackend *blk, uint64_t *nb_sectors_ptr); int64_t blk_nb_sectors(BlockBackend *blk); diff --git a/nbd/server.c b/nbd/server.c index 6f83bebcf01b6dc6215570605b78..8639ecbe9270e5463ecd05a27bbd 100644 --- a/nbd/server.c +++ b/nbd/server.c @@ -1119,7 +1119,7 @@ static void nbd_trip(void *opaque) TRACE("Writing to device"); ret = blk_pwrite(exp->blk, request.from + exp->dev_offset, - req->data, request.len); + req->data, request.len, 0); if (ret < 0) { LOG("writing to file failed"); reply.error = -ret; diff --git a/qemu-io-cmds.c b/qemu-io-cmds.c index e34f7771182146de192936fe18b4..e26e543a0780804938d954896af5 100644 --- a/qemu-io-cmds.c +++ b/qemu-io-cmds.c @@ -474,7 +474,7 @@ static int do_pwrite(BlockBackend *blk, char *buf, int64_t offset, return -ERANGE; } - *total = blk_pwrite(blk, offset, (uint8_t *)buf, count); + *total = blk_pwrite(blk, offset, (uint8_t *)buf, count, 0); if (*total < 0) { return *total; }
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