From: John Garry <john.garry@huawei.com>
To: <axboe@kernel.dk>, <damien.lemoal@opensource.wdc.com>,
<jejb@linux.ibm.com>, <martin.petersen@oracle.com>,
<jinpu.wang@cloud.ionos.com>, <hare@suse.de>,
<bvanassche@acm.org>, <hch@lst.de>, <ming.lei@redhat.com>,
<niklas.cassel@wdc.com>
Cc: <linux-block@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
<linux-ide@vger.kernel.org>, <linux-scsi@vger.kernel.org>,
<linuxarm@huawei.com>, John Garry <john.garry@huawei.com>
Subject: [PATCH RFC v3 02/22] scsi: core: Add scsi_get_dev()
Date: Tue, 25 Oct 2022 18:17:56 +0800 [thread overview]
Message-ID: <1666693096-180008-3-git-send-email-john.garry@huawei.com> (raw)
In-Reply-To: <1666693096-180008-1-git-send-email-john.garry@huawei.com>
Add a function which allows us to alloc a sdev with configurable
device parent, and channel:id:lun
This is useful for separating adding a scsi device into separate alloc
and scan steps
Signed-off-by: John Garry <john.garry@huawei.com>
---
drivers/scsi/scsi_scan.c | 25 +++++++++++++++++++++++++
include/scsi/scsi_host.h | 4 ++++
2 files changed, 29 insertions(+)
diff --git a/drivers/scsi/scsi_scan.c b/drivers/scsi/scsi_scan.c
index 5d27f5196de6..ad0a5902d1a0 100644
--- a/drivers/scsi/scsi_scan.c
+++ b/drivers/scsi/scsi_scan.c
@@ -1979,3 +1979,28 @@ void scsi_forget_host(struct Scsi_Host *shost)
spin_unlock_irqrestore(shost->host_lock, flags);
}
+struct scsi_device *scsi_get_dev(struct device *parent, int channel, uint id, u64 lun)
+{
+ struct Scsi_Host *shost = dev_to_shost(parent);
+ struct scsi_device *sdev = NULL;
+ struct scsi_target *starget;
+
+ mutex_lock(&shost->scan_mutex);
+ if (!scsi_host_scan_allowed(shost))
+ goto out;
+
+ starget = scsi_alloc_target(parent, channel, id);
+ if (!starget)
+ goto out;
+
+ sdev = scsi_alloc_sdev(starget, lun, NULL);
+ if (sdev)
+ sdev->borken = 0;
+ else
+ scsi_target_reap(starget);
+ put_device(&starget->dev);
+ out:
+ mutex_unlock(&shost->scan_mutex);
+ return sdev;
+}
+EXPORT_SYMBOL(scsi_get_dev);
diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h
index e71436183c0d..750ccf126377 100644
--- a/include/scsi/scsi_host.h
+++ b/include/scsi/scsi_host.h
@@ -787,6 +787,10 @@ void scsi_host_busy_iter(struct Scsi_Host *,
struct class_container;
+
+extern struct scsi_device *scsi_get_dev(struct device *parent, int channel,
+ uint id, u64 lun);
+
/*
* DIF defines the exchange of protection information between
* initiator and SBC block device.
--
2.35.3
next prev parent reply other threads:[~2022-10-25 9:48 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-25 10:17 [PATCH RFC v3 00/22] blk-mq/libata/scsi: SCSI driver tagging improvements Part I John Garry
2022-10-25 10:11 ` John Garry
2022-10-25 10:17 ` [PATCH RFC v3 01/22] blk-mq: Don't get budget for reserved requests John Garry
2022-10-27 1:16 ` Damien Le Moal
2022-10-27 9:09 ` John Garry
2022-10-25 10:17 ` John Garry [this message]
2022-10-25 10:17 ` [PATCH RFC v3 03/22] scsi: core: Implement reserved command handling John Garry
2022-10-27 1:18 ` Damien Le Moal
2022-10-27 7:51 ` Hannes Reinecke
2022-10-27 8:16 ` John Garry
2022-10-27 9:11 ` John Garry
2022-10-25 10:17 ` [PATCH RFC v3 04/22] scsi: core: Add support to send reserved commands John Garry
2022-10-27 1:21 ` Damien Le Moal
2022-10-27 9:13 ` John Garry
2022-10-27 9:18 ` Damien Le Moal
2022-10-25 10:17 ` [PATCH RFC v3 05/22] scsi: core: Add support for reserved command timeout handling John Garry
2022-10-25 10:18 ` [PATCH RFC v3 06/22] scsi: libsas: Improve sas_ex_discover_expander() error handling John Garry
2022-10-25 10:18 ` [PATCH RFC v3 07/22] scsi: libsas: Notify LLDD expander found before calling sas_rphy_add() John Garry
2022-10-25 10:18 ` [PATCH RFC v3 08/22] scsi: scsi_transport_sas: Alloc sdev for expander John Garry
2022-10-25 10:18 ` [PATCH RFC v3 09/22] scsi: libsas: Add sas_alloc_slow_task_rq() John Garry
2022-10-25 10:18 ` [PATCH RFC v3 10/22] scsi: libsas: Add sas_queuecommand_internal() John Garry
2022-10-25 10:18 ` [PATCH RFC v3 11/22] scsi: libsas: Add sas_internal_timeout() John Garry
2022-10-25 10:18 ` [PATCH RFC v3 12/22] scsi: core: Use SCSI_SCAN_RESCAN in __scsi_add_device() John Garry
2022-10-25 10:18 ` [PATCH RFC v3 13/22] scsi: scsi_transport_sas: Allocate end device target id in the rphy alloc John Garry
2022-10-25 10:18 ` [PATCH RFC v3 14/22] ata: libata-scsi: Add ata_scsi_setup_sdev() John Garry
2022-10-25 10:18 ` [PATCH RFC v3 15/22] scsi: libsas: Add sas_ata_setup_device() John Garry
2022-10-25 10:18 ` [PATCH RFC v3 16/22] ata: libata-scsi: Allocate sdev early in port probe John Garry
2022-10-27 1:34 ` Damien Le Moal
2022-10-27 8:11 ` Hannes Reinecke
2022-10-27 9:16 ` Damien Le Moal
2022-10-27 9:51 ` Hannes Reinecke
2022-11-07 10:09 ` John Garry
2022-11-07 10:20 ` Hannes Reinecke
2022-10-25 10:18 ` [PATCH RFC v3 17/22] scsi: libsas drivers: Reserve tags John Garry
2022-10-25 10:18 ` [PATCH RFC v3 18/22] scsi: libsas: Queue SMP commands as requests John Garry
2022-10-27 1:36 ` Damien Le Moal
2022-10-27 10:45 ` John Garry
2022-10-25 10:18 ` [PATCH RFC v3 19/22] scsi: libsas: Queue TMF " John Garry
2022-10-25 10:18 ` [PATCH RFC v3 20/22] scsi: core: Add scsi_alloc_request_hwq() John Garry
2022-10-25 10:18 ` [PATCH RFC v3 21/22] scsi: libsas: Queue internal abort commands as requests John Garry
2022-10-29 1:15 ` chenxiang (M)
2022-11-02 10:04 ` John Garry
2022-11-03 3:09 ` chenxiang (M)
2022-10-25 10:18 ` [PATCH RFC v3 22/22] scsi: libsas: Delete sas_task_slow.timer John Garry
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