From 618fa3644ab3d95c570fb4d52e88c783884f2033 Mon Sep 17 00:00:00 2001 From: Markus Armbruster Date: Tue, 4 Oct 2011 16:24:37 +0200 Subject: [PATCH 62/76] block: Revert entanglement of bdrv_is_inserted() with tray status RH-Author: Markus Armbruster Message-id: <1317745491-18401-55-git-send-email-armbru@redhat.com> Patchwork-id: 33636 O-Subject: [PATCH RHEL-6.2 qemu-kvm 54/68] block: Revert entanglement of bdrv_is_inserted() with tray status Bugzilla: 742458 RH-Acked-by: Paolo Bonzini RH-Acked-by: Amit Shah RH-Acked-by: Juan Quintela Commit 4be9762a changed bdrv_is_inserted() to fail when the tray is open. Unfortunately, there are two different kinds of users, with conflicting needs. 1. Device models using bdrv_eject(), currently ide-cd and scsi-cd. They expect bdrv_is_inserted() to reflect the tray status. Commit 4be9762a makes them happy. 2. Code that wants to know whether a BlockDriverState has media, such as find_image_format(), bdrv_flush_all(). Commit 4be9762a makes them unhappy. In particular, it breaks flush on VM stop for media ejected by the guest. Revert the change to bdrv_is_inserted(). Check the tray status in the device models instead. Note on IDE: Since only ATAPI devices have a tray, and they don't accept ATA commands since the recent commit "ide: Reject ATA commands specific to drive kinds", checking in atapi.c suffices. Signed-off-by: Markus Armbruster Signed-off-by: Kevin Wolf (cherry picked from commit a1aff5bf6786e6e8478373e4ada869a4ef2a7fc4) --- block.c | 7 +++---- hw/ide/atapi.c | 15 ++++++++------- hw/scsi-disk.c | 10 ++++++++-- 3 files changed, 19 insertions(+), 13 deletions(-) Signed-off-by: Michal Novotny --- block.c | 7 +++---- hw/ide/atapi.c | 15 ++++++++------- hw/scsi-disk.c | 10 ++++++++-- 3 files changed, 19 insertions(+), 13 deletions(-) diff --git a/block.c b/block.c index 1e0ac02..6cb51ec 100644 --- a/block.c +++ b/block.c @@ -2607,13 +2607,12 @@ void qemu_aio_release(void *p) int bdrv_is_inserted(BlockDriverState *bs) { BlockDriver *drv = bs->drv; - int ret; + if (!drv) return 0; if (!drv->bdrv_is_inserted) - return !bs->tray_open; - ret = drv->bdrv_is_inserted(bs); - return ret; + return 1; + return drv->bdrv_is_inserted(bs); } /** diff --git a/hw/ide/atapi.c b/hw/ide/atapi.c index 8e01417..48c91f5 100644 --- a/hw/ide/atapi.c +++ b/hw/ide/atapi.c @@ -73,7 +73,7 @@ static void lba_to_msf(uint8_t *buf, int lba) static inline int media_present(IDEState *s) { - return (s->nb_sectors > 0); + return !s->tray_open && s->nb_sectors > 0; } /* XXX: DVDs that could fit on a CD will be reported as a CD */ @@ -1074,20 +1074,21 @@ static const struct { [ 0x03 ] = { cmd_request_sense, ALLOW_UA }, [ 0x12 ] = { cmd_inquiry, ALLOW_UA }, [ 0x1a ] = { cmd_mode_sense, /* (6) */ 0 }, - [ 0x1b ] = { cmd_start_stop_unit, 0 }, + [ 0x1b ] = { cmd_start_stop_unit, 0 }, /* [1] */ [ 0x1e ] = { cmd_prevent_allow_medium_removal, 0 }, [ 0x25 ] = { cmd_read_cdvd_capacity, CHECK_READY }, - [ 0x28 ] = { cmd_read, /* (10) */ 0 }, + [ 0x28 ] = { cmd_read, /* (10) */ CHECK_READY }, [ 0x2b ] = { cmd_seek, CHECK_READY }, [ 0x43 ] = { cmd_read_toc_pma_atip, CHECK_READY }, [ 0x46 ] = { cmd_get_configuration, ALLOW_UA }, [ 0x4a ] = { cmd_get_event_status_notification, ALLOW_UA }, [ 0x5a ] = { cmd_mode_sense, /* (10) */ 0 }, - [ 0xa8 ] = { cmd_read, /* (12) */ 0 }, - [ 0xad ] = { cmd_read_dvd_structure, 0 }, + [ 0xa8 ] = { cmd_read, /* (12) */ CHECK_READY }, + [ 0xad ] = { cmd_read_dvd_structure, CHECK_READY }, [ 0xbb ] = { cmd_set_speed, 0 }, [ 0xbd ] = { cmd_mechanism_status, 0 }, - [ 0xbe ] = { cmd_read_cd, 0 }, + [ 0xbe ] = { cmd_read_cd, CHECK_READY }, + /* [1] handler detects and reports not ready condition itself */ }; void ide_atapi_cmd(IDEState *s) @@ -1125,7 +1126,7 @@ void ide_atapi_cmd(IDEState *s) * GET_EVENT_STATUS_NOTIFICATION to detect such tray open/close * states rely on this behavior. */ - if (bdrv_is_inserted(s->bs) && s->cdrom_changed) { + if (!s->tray_open && bdrv_is_inserted(s->bs) && s->cdrom_changed) { ide_atapi_cmd_error(s, SENSE_NOT_READY, ASC_MEDIUM_NOT_PRESENT); s->cdrom_changed = 0; diff --git a/hw/scsi-disk.c b/hw/scsi-disk.c index 9674e3e..b0d1e88 100644 --- a/hw/scsi-disk.c +++ b/hw/scsi-disk.c @@ -177,6 +177,9 @@ static void scsi_read_data(SCSIRequest *req) if (n > SCSI_DMA_BUF_SIZE / 512) n = SCSI_DMA_BUF_SIZE / 512; + if (s->tray_open) { + scsi_read_complete(r, -ENOMEDIUM); + } r->iov.iov_len = n * 512; qemu_iovec_init_external(&r->qiov, &r->iov, 1); @@ -274,6 +277,9 @@ static void scsi_write_data(SCSIRequest *req) n = r->iov.iov_len / 512; if (n) { + if (s->tray_open) { + scsi_write_complete(r, -ENOMEDIUM); + } qemu_iovec_init_external(&r->qiov, &r->iov, 1); bdrv_acct_start(s->bs, &r->acct, n * BDRV_SECTOR_SIZE, BDRV_ACCT_WRITE); @@ -828,7 +834,7 @@ static int scsi_disk_emulate_command(SCSIDiskReq *r, uint8_t *outbuf) switch (req->cmd.buf[0]) { case TEST_UNIT_READY: - if (!bdrv_is_inserted(s->bs)) + if (s->tray_open || !bdrv_is_inserted(s->bs)) goto not_ready; break; case REQUEST_SENSE: @@ -975,7 +981,7 @@ static int scsi_disk_emulate_command(SCSIDiskReq *r, uint8_t *outbuf) return buflen; not_ready: - if (!bdrv_is_inserted(s->bs)) { + if (s->tray_open || !bdrv_is_inserted(s->bs)) { scsi_check_condition(r, SENSE_CODE(NO_MEDIUM)); } else { scsi_check_condition(r, SENSE_CODE(LUN_NOT_READY)); -- 1.7.4.4