diff options
| author | Martin K. Petersen <martin.petersen@oracle.com> | 2022-03-02 00:35:50 -0500 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2022-05-02 16:59:11 -0400 |
| commit | e60ac0b9e445822e60230c00e68d8cdb7748701b (patch) | |
| tree | 75b122b19e4922541670042bf29c46a69a47f5c6 /drivers/scsi/scsi_sysfs.c | |
| parent | e17d63403076affccd72d195f93bbf3f39514005 (diff) | |
scsi: core: Cache VPD pages b0, b1, b2
The SCSI disk driver consults VPD pages b0 (Block Limits), b1 (Block Device
Characteristics), and b2 (Logical Block Provisioning). Instead of having
sd.c request these pages every revalidate cycle, cache them along with the
other commonly used VPDs.
Link: https://lore.kernel.org/r/20220302053559.32147-6-martin.petersen@oracle.com
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/scsi_sysfs.c')
| -rw-r--r-- | drivers/scsi/scsi_sysfs.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/drivers/scsi/scsi_sysfs.c b/drivers/scsi/scsi_sysfs.c index dc6872e352bd..546a9e3cfbec 100644 --- a/drivers/scsi/scsi_sysfs.c +++ b/drivers/scsi/scsi_sysfs.c @@ -448,6 +448,7 @@ static void scsi_device_dev_release_usercontext(struct work_struct *work) struct list_head *this, *tmp; struct scsi_vpd *vpd_pg80 = NULL, *vpd_pg83 = NULL; struct scsi_vpd *vpd_pg0 = NULL, *vpd_pg89 = NULL; + struct scsi_vpd *vpd_pgb0 = NULL, *vpd_pgb1 = NULL, *vpd_pgb2 = NULL; unsigned long flags; struct module *mod; @@ -490,6 +491,12 @@ static void scsi_device_dev_release_usercontext(struct work_struct *work) lockdep_is_held(&sdev->inquiry_mutex)); vpd_pg89 = rcu_replace_pointer(sdev->vpd_pg89, vpd_pg89, lockdep_is_held(&sdev->inquiry_mutex)); + vpd_pgb0 = rcu_replace_pointer(sdev->vpd_pgb0, vpd_pgb0, + lockdep_is_held(&sdev->inquiry_mutex)); + vpd_pgb1 = rcu_replace_pointer(sdev->vpd_pgb1, vpd_pgb1, + lockdep_is_held(&sdev->inquiry_mutex)); + vpd_pgb2 = rcu_replace_pointer(sdev->vpd_pgb2, vpd_pgb2, + lockdep_is_held(&sdev->inquiry_mutex)); mutex_unlock(&sdev->inquiry_mutex); if (vpd_pg0) @@ -500,6 +507,12 @@ static void scsi_device_dev_release_usercontext(struct work_struct *work) kfree_rcu(vpd_pg80, rcu); if (vpd_pg89) kfree_rcu(vpd_pg89, rcu); + if (vpd_pgb0) + kfree_rcu(vpd_pgb0, rcu); + if (vpd_pgb1) + kfree_rcu(vpd_pgb1, rcu); + if (vpd_pgb2) + kfree_rcu(vpd_pgb2, rcu); kfree(sdev->inquiry); kfree(sdev); @@ -913,6 +926,9 @@ static struct bin_attribute dev_attr_vpd_##_page = { \ sdev_vpd_pg_attr(pg83); sdev_vpd_pg_attr(pg80); sdev_vpd_pg_attr(pg89); +sdev_vpd_pg_attr(pgb0); +sdev_vpd_pg_attr(pgb1); +sdev_vpd_pg_attr(pgb2); sdev_vpd_pg_attr(pg0); static ssize_t show_inquiry(struct file *filep, struct kobject *kobj, @@ -1250,6 +1266,15 @@ static umode_t scsi_sdev_bin_attr_is_visible(struct kobject *kobj, if (attr == &dev_attr_vpd_pg89 && !sdev->vpd_pg89) return 0; + if (attr == &dev_attr_vpd_pgb0 && !sdev->vpd_pgb0) + return 0; + + if (attr == &dev_attr_vpd_pgb1 && !sdev->vpd_pgb1) + return 0; + + if (attr == &dev_attr_vpd_pgb2 && !sdev->vpd_pgb2) + return 0; + return S_IRUGO; } @@ -1296,6 +1321,9 @@ static struct bin_attribute *scsi_sdev_bin_attrs[] = { &dev_attr_vpd_pg83, &dev_attr_vpd_pg80, &dev_attr_vpd_pg89, + &dev_attr_vpd_pgb0, + &dev_attr_vpd_pgb1, + &dev_attr_vpd_pgb2, &dev_attr_inquiry, NULL }; |