From: Michal Suchanek <msuchanek@suse.de>
To: linux-scsi@vger.kernel.org
Cc: Michal Suchanek <msuchanek@suse.de>,
Jonathan Corbet <corbet@lwn.net>, Jens Axboe <axboe@kernel.dk>,
"James E.J. Bottomley" <jejb@linux.ibm.com>,
"Martin K. Petersen" <martin.petersen@oracle.com>,
Alexander Viro <viro@zeniv.linux.org.uk>,
Mauro Carvalho Chehab <mchehab+samsung@kernel.org>,
Eric Biggers <ebiggers@google.com>,
"J. Bruce Fields" <bfields@redhat.com>,
Benjamin Coddington <bcodding@redhat.com>,
Hannes Reinecke <hare@suse.com>, Omar Sandoval <osandov@fb.com>,
Ming Lei <ming.lei@redhat.com>,
Damien Le Moal <damien.lemoal@wdc.com>,
Bart Van Assche <bvanassche@acm.org>, Tejun Heo <tj@kernel.org>,
linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-fsdevel@vger.kernel.org
Subject: [PATCH v2 4/8] cdrom: separate autoclose into an IOCTL
Date: Wed, 23 Oct 2019 14:52:43 +0200 [thread overview]
Message-ID: <eb3804ca76748a8113fbb2322dc23cb06b9109bf.1571834862.git.msuchanek@suse.de> (raw)
In-Reply-To: <cover.1571834862.git.msuchanek@suse.de>
This allows the sr driver to call it separately without blocking other
processes accessing the device. This solves a issue with process waiting
in open() on broken drive to close the tray blocking out all access to
the device, including nonblocking access to determine drive status.
Signed-off-by: Michal Suchanek <msuchanek@suse.de>
---
drivers/cdrom/cdrom.c | 83 +++++++++++++++++++++-----------------
include/uapi/linux/cdrom.h | 1 +
2 files changed, 48 insertions(+), 36 deletions(-)
diff --git a/drivers/cdrom/cdrom.c b/drivers/cdrom/cdrom.c
index c0fc9a02b70c..bd8813b5afdb 100644
--- a/drivers/cdrom/cdrom.c
+++ b/drivers/cdrom/cdrom.c
@@ -1071,46 +1071,16 @@ int open_for_common(struct cdrom_device_info *cdi, tracktype *tracks)
cd_dbg(CD_OPEN, "drive_status=%d\n", ret);
if (ret == CDS_TRAY_OPEN) {
cd_dbg(CD_OPEN, "the tray is open...\n");
- /* can/may i close it? */
- if (CDROM_CAN(CDC_CLOSE_TRAY) &&
- cdi->options & CDO_AUTO_CLOSE) {
- cd_dbg(CD_OPEN, "trying to close the tray\n");
- ret = cdrom_tray_close(cdi);
- if (ret == -ERESTARTSYS)
- return ret;
- if (ret) {
- cd_dbg(CD_OPEN, "bummer. tried to close the tray but failed.\n");
- /* Ignore the error from the low
- level driver. We don't care why it
- couldn't close the tray. We only care
- that there is no disc in the drive,
- since that is the _REAL_ problem here.*/
- return -ENOMEDIUM;
- }
- } else {
- cd_dbg(CD_OPEN, "bummer. this drive can't close the tray.\n");
- return -ENOMEDIUM;
- }
- /* Ok, the door should be closed now.. Check again */
- ret = cdo->drive_status(cdi, CDSL_CURRENT);
- if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) {
- cd_dbg(CD_OPEN, "bummer. the tray is still not closed.\n");
- cd_dbg(CD_OPEN, "tray might not contain a medium\n");
- return -ENOMEDIUM;
- }
- cd_dbg(CD_OPEN, "the tray is now closed\n");
+ return -ENOMEDIUM;
}
- /* the door should be closed now, check for the disc */
if (ret == CDS_DRIVE_NOT_READY) {
- int poll_res = poll_event_interruptible(
- CDS_DRIVE_NOT_READY !=
- (ret = cdo->drive_status(cdi, CDSL_CURRENT)),
- 500);
- if (poll_res == -ERESTARTSYS)
- return poll_res;
+ cd_dbg(CD_OPEN, "the drive is not ready...\n");
+ return -ENOMEDIUM;
}
- if (ret != CDS_DISC_OK)
+ if (ret != CDS_DISC_OK) {
+ cd_dbg(CD_OPEN, "drive returned status %i...\n", ret);
return -ENOMEDIUM;
+ }
}
cdrom_count_tracks(cdi, tracks);
if (tracks->error == CDS_NO_DISC) {
@@ -2353,6 +2323,45 @@ static int cdrom_ioctl_closetray(struct cdrom_device_info *cdi)
return cdi->ops->tray_move(cdi, 0);
}
+static int cdrom_ioctl_autoclose(struct cdrom_device_info *cdi)
+{
+ const struct cdrom_device_ops *cdo = cdi->ops;
+ int ret;
+
+ if (!cdo->drive_status)
+ return -ENXIO;
+
+ ret = cdo->drive_status(cdi, CDSL_CURRENT);
+
+ if ((ret == CDS_TRAY_OPEN) && CDROM_CAN(CDC_CLOSE_TRAY) &&
+ (cdi->options & CDO_AUTO_CLOSE)) {
+ cd_dbg(CD_DO_IOCTL, "trying to close the tray...\n");
+ ret = cdrom_tray_close(cdi);
+ if (ret == -ERESTARTSYS)
+ return ret;
+ if (ret) {
+ cd_dbg(CD_DO_IOCTL, "bummer. tried to close the tray but failed.\n");
+ return -ENOMEDIUM;
+ ret = cdo->drive_status(cdi, CDSL_CURRENT);
+ }
+ ret = cdo->drive_status(cdi, CDSL_CURRENT);
+ }
+
+ if (ret == CDS_DRIVE_NOT_READY) {
+ int poll_res;
+
+ cd_dbg(CD_DO_IOCTL, "waiting for drive to become ready...\n");
+ poll_res = poll_event_interruptible(CDS_DRIVE_NOT_READY !=
+ (ret = cdo->drive_status(cdi, CDSL_CURRENT)), 50);
+ if (poll_res == -ERESTARTSYS)
+ return poll_res;
+ }
+ if (ret != CDS_DISC_OK)
+ return -ENOMEDIUM;
+
+ return 0;
+}
+
static int cdrom_ioctl_eject_sw(struct cdrom_device_info *cdi,
unsigned long arg)
{
@@ -3365,6 +3374,8 @@ int cdrom_ioctl(struct cdrom_device_info *cdi, struct block_device *bdev,
return cdrom_ioctl_debug(cdi, arg);
case CDROM_GET_CAPABILITY:
return cdrom_ioctl_get_capability(cdi);
+ case CDROM_AUTOCLOSE:
+ return cdrom_ioctl_autoclose(cdi);
case CDROM_GET_MCN:
return cdrom_ioctl_get_mcn(cdi, argp);
case CDROM_DRIVE_STATUS:
diff --git a/include/uapi/linux/cdrom.h b/include/uapi/linux/cdrom.h
index 2817230148fd..6493d8c593ee 100644
--- a/include/uapi/linux/cdrom.h
+++ b/include/uapi/linux/cdrom.h
@@ -129,6 +129,7 @@
#define CDROM_LOCKDOOR 0x5329 /* lock or unlock door */
#define CDROM_DEBUG 0x5330 /* Turn debug messages on/off */
#define CDROM_GET_CAPABILITY 0x5331 /* get capabilities */
+#define CDROM_AUTOCLOSE 0x5332 /* If autoclose enabled close tray */
/* Note that scsi/scsi_ioctl.h also uses 0x5382 - 0x5386.
* Future CDROM ioctls should be kept below 0x537F
--
2.23.0
next prev parent reply other threads:[~2019-10-23 12:53 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-23 12:52 [PATCH v2 0/8] Fix cdrom autoclose Michal Suchanek
2019-10-23 12:52 ` [PATCH v2 1/8] cdrom: add poll_event_interruptible Michal Suchanek
2019-10-23 12:52 ` [PATCH v2 2/8] cdrom: factor out common open_for_* code Michal Suchanek
2019-10-24 2:19 ` Christoph Hellwig
2019-10-24 8:50 ` Michal Suchánek
2019-10-25 2:39 ` Christoph Hellwig
2019-10-25 10:42 ` Michal Suchánek
2019-10-26 6:46 ` Finn Thain
2019-10-24 13:23 ` Matthew Wilcox
2019-10-25 2:38 ` Christoph Hellwig
2019-10-23 12:52 ` [PATCH v2 3/8] cdrom: wait for the tray to close Michal Suchanek
2019-10-23 12:52 ` Michal Suchanek [this message]
2019-10-23 12:52 ` [PATCH v2 5/8] docs: cdrom: Add autoclose IOCTL Michal Suchanek
2019-10-23 12:52 ` [PATCH v2 6/8] bdev: add open_finish Michal Suchanek
2019-10-24 2:22 ` Christoph Hellwig
2019-10-24 8:55 ` Michal Suchánek
2019-10-24 13:12 ` Matthew Wilcox
2019-10-24 13:19 ` Michal Suchánek
2019-11-21 10:15 ` Michal Suchánek
2019-10-23 12:52 ` [PATCH v2 7/8] scsi: sr: workaround VMware ESXi cdrom emulation bug Michal Suchanek
2019-10-23 14:13 ` Hannes Reinecke
2019-10-23 16:23 ` Michal Suchánek
2019-10-23 21:44 ` Ewan D. Milne
2019-10-24 5:46 ` Hannes Reinecke
2019-10-24 8:56 ` Michal Suchánek
2019-10-24 9:41 ` Hannes Reinecke
2019-10-24 10:11 ` Michal Suchánek
2019-10-24 11:45 ` [PATCH RFC] scsi: blacklist: add VMware ESXi cdrom - broken tray emulation Michal Suchanek
2019-10-24 2:23 ` [PATCH v2 7/8] scsi: sr: workaround VMware ESXi cdrom emulation bug Christoph Hellwig
2019-10-24 8:53 ` Michal Suchánek
2019-11-21 15:21 ` Michal Suchánek
2019-10-23 12:52 ` [PATCH v2 8/8] scsi: sr: wait for the medium to become ready Michal Suchanek
2019-10-24 2:24 ` Christoph Hellwig
2019-10-24 8:51 ` Michal Suchánek
2019-10-24 13:14 ` Matthew Wilcox
2019-10-26 14:57 ` [scsi] 9ed2563662: BUG:kernel_NULL_pointer_dereference,address kernel test robot
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=eb3804ca76748a8113fbb2322dc23cb06b9109bf.1571834862.git.msuchanek@suse.de \
--to=msuchanek@suse.de \
--cc=axboe@kernel.dk \
--cc=bcodding@redhat.com \
--cc=bfields@redhat.com \
--cc=bvanassche@acm.org \
--cc=corbet@lwn.net \
--cc=damien.lemoal@wdc.com \
--cc=ebiggers@google.com \
--cc=hare@suse.com \
--cc=jejb@linux.ibm.com \
--cc=linux-doc@vger.kernel.org \
--cc=linux-fsdevel@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-scsi@vger.kernel.org \
--cc=martin.petersen@oracle.com \
--cc=mchehab+samsung@kernel.org \
--cc=ming.lei@redhat.com \
--cc=osandov@fb.com \
--cc=tj@kernel.org \
--cc=viro@zeniv.linux.org.uk \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).