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X-Received-From: 162.221.156.55 Subject: [Qemu-devel] [PATCH v7 12/18] xen: remove 'ioreq' struct/varable/field names from dataplane/xen-block.c X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kevin Wolf , Stefano Stabellini , Max Reitz , Paul Durrant , Stefan Hajnoczi , Anthony Perard Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP This is a purely cosmetic patch that purges the name 'ioreq' from struct, variable and field names. (This name has been problematic for a long time as 'ioreq' is the name used for generic I/O requests coming from Xen). The patch replaces 'struct ioreq' with a new 'XenBlockRequest' type and 'ioreq' field/variable names with 'request', and then does necessary fix-up to adhere to coding style. Function names are not modified by this patch. They will be dealt with in a subsequent patch. No functional change. Signed-off-by: Paul Durrant Acked-by: Anthony Perard --- Cc: Stefan Hajnoczi Cc: Stefano Stabellini Cc: Kevin Wolf Cc: Max Reitz --- hw/block/dataplane/xen-block.c | 310 +++++++++++++++++---------------- 1 file changed, 156 insertions(+), 154 deletions(-) diff --git a/hw/block/dataplane/xen-block.c b/hw/block/dataplane/xen-block.c index 1ff464973c..6788bbf338 100644 --- a/hw/block/dataplane/xen-block.c +++ b/hw/block/dataplane/xen-block.c @@ -28,7 +28,7 @@ #include "sysemu/iothread.h" #include "xen-block.h" -struct ioreq { +typedef struct XenBlockRequest { blkif_request_t req; int16_t status; off_t start; @@ -39,9 +39,9 @@ struct ioreq { int aio_inflight; int aio_errors; XenBlockDataPlane *dataplane; - QLIST_ENTRY(ioreq) list; + QLIST_ENTRY(XenBlockRequest) list; BlockAcctCookie acct; -}; +} XenBlockRequest; struct XenBlockDataPlane { XenDevice *xendev; @@ -54,9 +54,9 @@ struct XenBlockDataPlane { int protocol; blkif_back_rings_t rings; int more_work; - QLIST_HEAD(inflight_head, ioreq) inflight; - QLIST_HEAD(finished_head, ioreq) finished; - QLIST_HEAD(freelist_head, ioreq) freelist; + QLIST_HEAD(inflight_head, XenBlockRequest) inflight; + QLIST_HEAD(finished_head, XenBlockRequest) finished; + QLIST_HEAD(freelist_head, XenBlockRequest) freelist; int requests_total; int requests_inflight; int requests_finished; @@ -67,68 +67,68 @@ struct XenBlockDataPlane { AioContext *ctx; }; -static void ioreq_reset(struct ioreq *ioreq) +static void ioreq_reset(XenBlockRequest *request) { - memset(&ioreq->req, 0, sizeof(ioreq->req)); - ioreq->status = 0; - ioreq->start = 0; - ioreq->buf = NULL; - ioreq->size = 0; - ioreq->presync = 0; + memset(&request->req, 0, sizeof(request->req)); + request->status = 0; + request->start = 0; + request->buf = NULL; + request->size = 0; + request->presync = 0; - ioreq->aio_inflight = 0; - ioreq->aio_errors = 0; + request->aio_inflight = 0; + request->aio_errors = 0; - ioreq->dataplane = NULL; - memset(&ioreq->list, 0, sizeof(ioreq->list)); - memset(&ioreq->acct, 0, sizeof(ioreq->acct)); + request->dataplane = NULL; + memset(&request->list, 0, sizeof(request->list)); + memset(&request->acct, 0, sizeof(request->acct)); - qemu_iovec_reset(&ioreq->v); + qemu_iovec_reset(&request->v); } -static struct ioreq *ioreq_start(XenBlockDataPlane *dataplane) +static XenBlockRequest *ioreq_start(XenBlockDataPlane *dataplane) { - struct ioreq *ioreq = NULL; + XenBlockRequest *request = NULL; if (QLIST_EMPTY(&dataplane->freelist)) { if (dataplane->requests_total >= dataplane->max_requests) { goto out; } /* allocate new struct */ - ioreq = g_malloc0(sizeof(*ioreq)); - ioreq->dataplane = dataplane; + request = g_malloc0(sizeof(*request)); + request->dataplane = dataplane; dataplane->requests_total++; - qemu_iovec_init(&ioreq->v, 1); + qemu_iovec_init(&request->v, 1); } else { /* get one from freelist */ - ioreq = QLIST_FIRST(&dataplane->freelist); - QLIST_REMOVE(ioreq, list); + request = QLIST_FIRST(&dataplane->freelist); + QLIST_REMOVE(request, list); } - QLIST_INSERT_HEAD(&dataplane->inflight, ioreq, list); + QLIST_INSERT_HEAD(&dataplane->inflight, request, list); dataplane->requests_inflight++; out: - return ioreq; + return request; } -static void ioreq_finish(struct ioreq *ioreq) +static void ioreq_finish(XenBlockRequest *request) { - XenBlockDataPlane *dataplane = ioreq->dataplane; + XenBlockDataPlane *dataplane = request->dataplane; - QLIST_REMOVE(ioreq, list); - QLIST_INSERT_HEAD(&dataplane->finished, ioreq, list); + QLIST_REMOVE(request, list); + QLIST_INSERT_HEAD(&dataplane->finished, request, list); dataplane->requests_inflight--; dataplane->requests_finished++; } -static void ioreq_release(struct ioreq *ioreq, bool finish) +static void ioreq_release(XenBlockRequest *request, bool finish) { - XenBlockDataPlane *dataplane = ioreq->dataplane; + XenBlockDataPlane *dataplane = request->dataplane; - QLIST_REMOVE(ioreq, list); - ioreq_reset(ioreq); - ioreq->dataplane = dataplane; - QLIST_INSERT_HEAD(&dataplane->freelist, ioreq, list); + QLIST_REMOVE(request, list); + ioreq_reset(request); + request->dataplane = dataplane; + QLIST_INSERT_HEAD(&dataplane->freelist, request, list); if (finish) { dataplane->requests_finished--; } else { @@ -140,18 +140,18 @@ static void ioreq_release(struct ioreq *ioreq, bool finish) * translate request into iovec + start offset * do sanity checks along the way */ -static int ioreq_parse(struct ioreq *ioreq) +static int ioreq_parse(XenBlockRequest *request) { - XenBlockDataPlane *dataplane = ioreq->dataplane; + XenBlockDataPlane *dataplane = request->dataplane; size_t len; int i; - switch (ioreq->req.operation) { + switch (request->req.operation) { case BLKIF_OP_READ: break; case BLKIF_OP_FLUSH_DISKCACHE: - ioreq->presync = 1; - if (!ioreq->req.nr_segments) { + request->presync = 1; + if (!request->req.nr_segments) { return 0; } /* fall through */ @@ -160,77 +160,78 @@ static int ioreq_parse(struct ioreq *ioreq) case BLKIF_OP_DISCARD: return 0; default: - error_report("error: unknown operation (%d)", ioreq->req.operation); + error_report("error: unknown operation (%d)", request->req.operation); goto err; }; - if (ioreq->req.operation != BLKIF_OP_READ && + if (request->req.operation != BLKIF_OP_READ && blk_is_read_only(dataplane->blk)) { error_report("error: write req for ro device"); goto err; } - ioreq->start = ioreq->req.sector_number * dataplane->file_blk; - for (i = 0; i < ioreq->req.nr_segments; i++) { + request->start = request->req.sector_number * dataplane->file_blk; + for (i = 0; i < request->req.nr_segments; i++) { if (i == BLKIF_MAX_SEGMENTS_PER_REQUEST) { error_report("error: nr_segments too big"); goto err; } - if (ioreq->req.seg[i].first_sect > ioreq->req.seg[i].last_sect) { + if (request->req.seg[i].first_sect > request->req.seg[i].last_sect) { error_report("error: first > last sector"); goto err; } - if (ioreq->req.seg[i].last_sect * dataplane->file_blk >= XC_PAGE_SIZE) { + if (request->req.seg[i].last_sect * dataplane->file_blk >= + XC_PAGE_SIZE) { error_report("error: page crossing"); goto err; } - len = (ioreq->req.seg[i].last_sect - - ioreq->req.seg[i].first_sect + 1) * dataplane->file_blk; - ioreq->size += len; + len = (request->req.seg[i].last_sect - + request->req.seg[i].first_sect + 1) * dataplane->file_blk; + request->size += len; } - if (ioreq->start + ioreq->size > dataplane->file_size) { + if (request->start + request->size > dataplane->file_size) { error_report("error: access beyond end of file"); goto err; } return 0; err: - ioreq->status = BLKIF_RSP_ERROR; + request->status = BLKIF_RSP_ERROR; return -1; } -static int ioreq_grant_copy(struct ioreq *ioreq) +static int ioreq_grant_copy(XenBlockRequest *request) { - XenBlockDataPlane *dataplane = ioreq->dataplane; + XenBlockDataPlane *dataplane = request->dataplane; XenDevice *xendev = dataplane->xendev; XenDeviceGrantCopySegment segs[BLKIF_MAX_SEGMENTS_PER_REQUEST]; int i, count; int64_t file_blk = dataplane->file_blk; - bool to_domain = (ioreq->req.operation == BLKIF_OP_READ); - void *virt = ioreq->buf; + bool to_domain = (request->req.operation == BLKIF_OP_READ); + void *virt = request->buf; Error *local_err = NULL; - if (ioreq->req.nr_segments == 0) { + if (request->req.nr_segments == 0) { return 0; } - count = ioreq->req.nr_segments; + count = request->req.nr_segments; for (i = 0; i < count; 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 * + segs[i].dest.foreign.ref = request->req.seg[i].gref; + segs[i].dest.foreign.offset = request->req.seg[i].first_sect * file_blk; segs[i].source.virt = virt; } else { - segs[i].source.foreign.ref = ioreq->req.seg[i].gref; - segs[i].source.foreign.offset = ioreq->req.seg[i].first_sect * + segs[i].source.foreign.ref = request->req.seg[i].gref; + segs[i].source.foreign.offset = request->req.seg[i].first_sect * file_blk; segs[i].dest.virt = virt; } - segs[i].len = (ioreq->req.seg[i].last_sect - - ioreq->req.seg[i].first_sect + 1) * file_blk; + segs[i].len = (request->req.seg[i].last_sect - + request->req.seg[i].first_sect + 1) * file_blk; virt += segs[i].len; } @@ -239,72 +240,72 @@ static int ioreq_grant_copy(struct ioreq *ioreq) if (local_err) { error_reportf_err(local_err, "failed to copy data: "); - ioreq->aio_errors++; + request->aio_errors++; return -1; } return 0; } -static int ioreq_runio_qemu_aio(struct ioreq *ioreq); +static int ioreq_runio_qemu_aio(XenBlockRequest *request); static void qemu_aio_complete(void *opaque, int ret) { - struct ioreq *ioreq = opaque; - XenBlockDataPlane *dataplane = ioreq->dataplane; + XenBlockRequest *request = opaque; + XenBlockDataPlane *dataplane = request->dataplane; aio_context_acquire(dataplane->ctx); if (ret != 0) { error_report("%s I/O error", - ioreq->req.operation == BLKIF_OP_READ ? + request->req.operation == BLKIF_OP_READ ? "read" : "write"); - ioreq->aio_errors++; + request->aio_errors++; } - ioreq->aio_inflight--; - if (ioreq->presync) { - ioreq->presync = 0; - ioreq_runio_qemu_aio(ioreq); + request->aio_inflight--; + if (request->presync) { + request->presync = 0; + ioreq_runio_qemu_aio(request); goto done; } - if (ioreq->aio_inflight > 0) { + if (request->aio_inflight > 0) { goto done; } - switch (ioreq->req.operation) { + switch (request->req.operation) { case BLKIF_OP_READ: - /* in case of failure ioreq->aio_errors is increased */ + /* in case of failure request->aio_errors is increased */ if (ret == 0) { - ioreq_grant_copy(ioreq); + ioreq_grant_copy(request); } - qemu_vfree(ioreq->buf); + qemu_vfree(request->buf); break; case BLKIF_OP_WRITE: case BLKIF_OP_FLUSH_DISKCACHE: - if (!ioreq->req.nr_segments) { + if (!request->req.nr_segments) { break; } - qemu_vfree(ioreq->buf); + qemu_vfree(request->buf); break; default: break; } - ioreq->status = ioreq->aio_errors ? BLKIF_RSP_ERROR : BLKIF_RSP_OKAY; - ioreq_finish(ioreq); + request->status = request->aio_errors ? BLKIF_RSP_ERROR : BLKIF_RSP_OKAY; + ioreq_finish(request); - switch (ioreq->req.operation) { + switch (request->req.operation) { case BLKIF_OP_WRITE: case BLKIF_OP_FLUSH_DISKCACHE: - if (!ioreq->req.nr_segments) { + if (!request->req.nr_segments) { break; } case BLKIF_OP_READ: - if (ioreq->status == BLKIF_RSP_OKAY) { - block_acct_done(blk_get_stats(dataplane->blk), &ioreq->acct); + if (request->status == BLKIF_RSP_OKAY) { + block_acct_done(blk_get_stats(dataplane->blk), &request->acct); } else { - block_acct_failed(blk_get_stats(dataplane->blk), &ioreq->acct); + block_acct_failed(blk_get_stats(dataplane->blk), &request->acct); } break; case BLKIF_OP_DISCARD: @@ -317,10 +318,11 @@ done: aio_context_release(dataplane->ctx); } -static bool blk_split_discard(struct ioreq *ioreq, blkif_sector_t sector_number, +static bool blk_split_discard(XenBlockRequest *request, + blkif_sector_t sector_number, uint64_t nr_sectors) { - XenBlockDataPlane *dataplane = ioreq->dataplane; + XenBlockDataPlane *dataplane = request->dataplane; int64_t byte_offset; int byte_chunk; uint64_t byte_remaining, limit; @@ -339,9 +341,9 @@ static bool blk_split_discard(struct ioreq *ioreq, blkif_sector_t sector_number, do { byte_chunk = byte_remaining > limit ? limit : byte_remaining; - ioreq->aio_inflight++; + request->aio_inflight++; blk_aio_pdiscard(dataplane->blk, byte_offset, byte_chunk, - qemu_aio_complete, ioreq); + qemu_aio_complete, request); byte_remaining -= byte_chunk; byte_offset += byte_chunk; } while (byte_remaining > 0); @@ -349,53 +351,53 @@ static bool blk_split_discard(struct ioreq *ioreq, blkif_sector_t sector_number, return true; } -static int ioreq_runio_qemu_aio(struct ioreq *ioreq) +static int ioreq_runio_qemu_aio(XenBlockRequest *request) { - XenBlockDataPlane *dataplane = ioreq->dataplane; - - 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); + XenBlockDataPlane *dataplane = request->dataplane; + + request->buf = qemu_memalign(XC_PAGE_SIZE, request->size); + if (request->req.nr_segments && + (request->req.operation == BLKIF_OP_WRITE || + request->req.operation == BLKIF_OP_FLUSH_DISKCACHE) && + ioreq_grant_copy(request)) { + qemu_vfree(request->buf); goto err; } - ioreq->aio_inflight++; - if (ioreq->presync) { - blk_aio_flush(ioreq->dataplane->blk, qemu_aio_complete, ioreq); + request->aio_inflight++; + if (request->presync) { + blk_aio_flush(request->dataplane->blk, qemu_aio_complete, request); return 0; } - switch (ioreq->req.operation) { + switch (request->req.operation) { case BLKIF_OP_READ: - qemu_iovec_add(&ioreq->v, ioreq->buf, ioreq->size); - block_acct_start(blk_get_stats(dataplane->blk), &ioreq->acct, - ioreq->v.size, BLOCK_ACCT_READ); - ioreq->aio_inflight++; - blk_aio_preadv(dataplane->blk, ioreq->start, &ioreq->v, 0, - qemu_aio_complete, ioreq); + qemu_iovec_add(&request->v, request->buf, request->size); + block_acct_start(blk_get_stats(dataplane->blk), &request->acct, + request->v.size, BLOCK_ACCT_READ); + request->aio_inflight++; + blk_aio_preadv(dataplane->blk, request->start, &request->v, 0, + qemu_aio_complete, request); break; case BLKIF_OP_WRITE: case BLKIF_OP_FLUSH_DISKCACHE: - if (!ioreq->req.nr_segments) { + if (!request->req.nr_segments) { break; } - qemu_iovec_add(&ioreq->v, ioreq->buf, ioreq->size); - block_acct_start(blk_get_stats(dataplane->blk), &ioreq->acct, - ioreq->v.size, - ioreq->req.operation == BLKIF_OP_WRITE ? + qemu_iovec_add(&request->v, request->buf, request->size); + block_acct_start(blk_get_stats(dataplane->blk), &request->acct, + request->v.size, + request->req.operation == BLKIF_OP_WRITE ? BLOCK_ACCT_WRITE : BLOCK_ACCT_FLUSH); - ioreq->aio_inflight++; - blk_aio_pwritev(dataplane->blk, ioreq->start, &ioreq->v, 0, - qemu_aio_complete, ioreq); + request->aio_inflight++; + blk_aio_pwritev(dataplane->blk, request->start, &request->v, 0, + qemu_aio_complete, request); break; case BLKIF_OP_DISCARD: { - struct blkif_request_discard *req = (void *)&ioreq->req; - if (!blk_split_discard(ioreq, req->sector_number, req->nr_sectors)) { + struct blkif_request_discard *req = (void *)&request->req; + if (!blk_split_discard(request, req->sector_number, req->nr_sectors)) { goto err; } break; @@ -405,19 +407,19 @@ static int ioreq_runio_qemu_aio(struct ioreq *ioreq) goto err; } - qemu_aio_complete(ioreq, 0); + qemu_aio_complete(request, 0); return 0; err: - ioreq_finish(ioreq); - ioreq->status = BLKIF_RSP_ERROR; + ioreq_finish(request); + request->status = BLKIF_RSP_ERROR; return -1; } -static int blk_send_response_one(struct ioreq *ioreq) +static int blk_send_response_one(XenBlockRequest *request) { - XenBlockDataPlane *dataplane = ioreq->dataplane; + XenBlockDataPlane *dataplane = request->dataplane; int send_notify = 0; int have_requests = 0; blkif_response_t *resp; @@ -443,9 +445,9 @@ static int blk_send_response_one(struct ioreq *ioreq) return 0; } - resp->id = ioreq->req.id; - resp->operation = ioreq->req.operation; - resp->status = ioreq->status; + resp->id = request->req.id; + resp->operation = request->req.operation; + resp->status = request->status; dataplane->rings.common.rsp_prod_pvt++; @@ -473,13 +475,13 @@ static int blk_send_response_one(struct ioreq *ioreq) /* walk finished list, send outstanding responses, free requests */ static void blk_send_response_all(XenBlockDataPlane *dataplane) { - struct ioreq *ioreq; + XenBlockRequest *request; int send_notify = 0; while (!QLIST_EMPTY(&dataplane->finished)) { - ioreq = QLIST_FIRST(&dataplane->finished); - send_notify += blk_send_response_one(ioreq); - ioreq_release(ioreq, true); + request = QLIST_FIRST(&dataplane->finished); + send_notify += blk_send_response_one(request); + ioreq_release(request, true); } if (send_notify) { Error *local_err = NULL; @@ -493,29 +495,29 @@ static void blk_send_response_all(XenBlockDataPlane *dataplane) } } -static int blk_get_request(XenBlockDataPlane *dataplane, struct ioreq *ioreq, - RING_IDX rc) +static int blk_get_request(XenBlockDataPlane *dataplane, + XenBlockRequest *request, RING_IDX rc) { switch (dataplane->protocol) { case BLKIF_PROTOCOL_NATIVE: { blkif_request_t *req = RING_GET_REQUEST(&dataplane->rings.native, rc); - memcpy(&ioreq->req, req, sizeof(ioreq->req)); + memcpy(&request->req, req, sizeof(request->req)); break; } case BLKIF_PROTOCOL_X86_32: { blkif_x86_32_request_t *req = RING_GET_REQUEST(&dataplane->rings.x86_32_part, rc); - blkif_get_x86_32_req(&ioreq->req, req); + blkif_get_x86_32_req(&request->req, req); break; } case BLKIF_PROTOCOL_X86_64: { blkif_x86_64_request_t *req = RING_GET_REQUEST(&dataplane->rings.x86_64_part, rc); - blkif_get_x86_64_req(&ioreq->req, req); + blkif_get_x86_64_req(&request->req, req); break; } } @@ -527,7 +529,7 @@ static int blk_get_request(XenBlockDataPlane *dataplane, struct ioreq *ioreq, static void blk_handle_requests(XenBlockDataPlane *dataplane) { RING_IDX rc, rp; - struct ioreq *ioreq; + XenBlockRequest *request; dataplane->more_work = 0; @@ -541,18 +543,18 @@ static void blk_handle_requests(XenBlockDataPlane *dataplane) if (RING_REQUEST_CONS_OVERFLOW(&dataplane->rings.common, rc)) { break; } - ioreq = ioreq_start(dataplane); - if (ioreq == NULL) { + request = ioreq_start(dataplane); + if (request == NULL) { dataplane->more_work++; break; } - blk_get_request(dataplane, ioreq, rc); + blk_get_request(dataplane, request, rc); dataplane->rings.common.req_cons = ++rc; /* parse them */ - if (ioreq_parse(ioreq) != 0) { + if (ioreq_parse(request) != 0) { - switch (ioreq->req.operation) { + switch (request->req.operation) { case BLKIF_OP_READ: block_acct_invalid(blk_get_stats(dataplane->blk), BLOCK_ACCT_READ); @@ -568,7 +570,7 @@ static void blk_handle_requests(XenBlockDataPlane *dataplane) break; }; - if (blk_send_response_one(ioreq)) { + if (blk_send_response_one(request)) { Error *local_err = NULL; xen_device_notify_event_channel(dataplane->xendev, @@ -578,11 +580,11 @@ static void blk_handle_requests(XenBlockDataPlane *dataplane) error_report_err(local_err); } } - ioreq_release(ioreq, false); + ioreq_release(request, false); continue; } - ioreq_runio_qemu_aio(ioreq); + ioreq_runio_qemu_aio(request); } if (dataplane->more_work && @@ -636,17 +638,17 @@ XenBlockDataPlane *xen_block_dataplane_create(XenDevice *xendev, void xen_block_dataplane_destroy(XenBlockDataPlane *dataplane) { - struct ioreq *ioreq; + XenBlockRequest *request; if (!dataplane) { return; } while (!QLIST_EMPTY(&dataplane->freelist)) { - ioreq = QLIST_FIRST(&dataplane->freelist); - QLIST_REMOVE(ioreq, list); - qemu_iovec_destroy(&ioreq->v); - g_free(ioreq); + request = QLIST_FIRST(&dataplane->freelist); + QLIST_REMOVE(request, list); + qemu_iovec_destroy(&request->v); + g_free(request); } qemu_bh_delete(dataplane->bh);