target/linux/generic/backport-5.4/800-v5.5-scsi-core-Add-sysfs-attributes-for-VPD-pages-0h-and-.patch

   1 From d188b0675b21d5a6ca27b3e741381813983f4719 Mon Sep 17 00:00:00 2001
   2 From: Ryan Attard <ryanattard@ryanattard.info>
   3 Date: Thu, 26 Sep 2019 11:22:17 -0500
   4 Subject: [PATCH] scsi: core: Add sysfs attributes for VPD pages 0h and 89h
   5
   6 Add sysfs attributes for the ATA information page and Supported VPD Pages
   7 page.
   8
   9 Link: https://lore.kernel.org/r/20190926162216.56591-1-ryanattard@ryanattard.info
  10 Signed-off-by: Ryan Attard <ryanattard@ryanattard.info>
  11 Reviewed-by: Bart Van Assche <bvanassche@acm.org>
  12 Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
  13 ---
  14  drivers/scsi/scsi.c        |  4 ++++
  15  drivers/scsi/scsi_sysfs.c  | 19 +++++++++++++++++++
  16  include/scsi/scsi_device.h |  2 ++
  17  3 files changed, 25 insertions(+)
  18
  19 --- a/drivers/scsi/scsi.c
  20 +++ b/drivers/scsi/scsi.c
  21 @@ -465,10 +465,14 @@ void scsi_attach_vpd(struct scsi_device
  22                 return;
  23
  24         for (i = 4; i < vpd_buf->len; i++) {
  25 +               if (vpd_buf->data[i] == 0x0)
  26 +                       scsi_update_vpd_page(sdev, 0x0, &sdev->vpd_pg0);
  27                 if (vpd_buf->data[i] == 0x80)
  28                         scsi_update_vpd_page(sdev, 0x80, &sdev->vpd_pg80);
  29                 if (vpd_buf->data[i] == 0x83)
  30                         scsi_update_vpd_page(sdev, 0x83, &sdev->vpd_pg83);
  31 +               if (vpd_buf->data[i] == 0x89)
  32 +                       scsi_update_vpd_page(sdev, 0x89, &sdev->vpd_pg89);
  33         }
  34         kfree(vpd_buf);
  35  }
  36 --- a/drivers/scsi/scsi_sysfs.c
  37 +++ b/drivers/scsi/scsi_sysfs.c
  38 @@ -437,6 +437,7 @@ static void scsi_device_dev_release_user
  39         struct device *parent;
  40         struct list_head *this, *tmp;
  41         struct scsi_vpd *vpd_pg80 = NULL, *vpd_pg83 = NULL;
  42 +       struct scsi_vpd *vpd_pg0 = NULL, *vpd_pg89 = NULL;
  43         unsigned long flags;
  44
  45         sdev = container_of(work, struct scsi_device, ew.work);
  46 @@ -466,16 +467,24 @@ static void scsi_device_dev_release_user
  47         sdev->request_queue = NULL;
  48
  49         mutex_lock(&sdev->inquiry_mutex);
  50 +       rcu_swap_protected(sdev->vpd_pg0, vpd_pg0,
  51 +                          lockdep_is_held(&sdev->inquiry_mutex));
  52         rcu_swap_protected(sdev->vpd_pg80, vpd_pg80,
  53                            lockdep_is_held(&sdev->inquiry_mutex));
  54         rcu_swap_protected(sdev->vpd_pg83, vpd_pg83,
  55                            lockdep_is_held(&sdev->inquiry_mutex));
  56 +       rcu_swap_protected(sdev->vpd_pg89, vpd_pg89,
  57 +                          lockdep_is_held(&sdev->inquiry_mutex));
  58         mutex_unlock(&sdev->inquiry_mutex);
  59
  60 +       if (vpd_pg0)
  61 +               kfree_rcu(vpd_pg0, rcu);
  62         if (vpd_pg83)
  63                 kfree_rcu(vpd_pg83, rcu);
  64         if (vpd_pg80)
  65                 kfree_rcu(vpd_pg80, rcu);
  66 +       if (vpd_pg89)
  67 +               kfree_rcu(vpd_pg89, rcu);
  68         kfree(sdev->inquiry);
  69         kfree(sdev);
  70
  71 @@ -871,6 +880,8 @@ static struct bin_attribute dev_attr_vpd
  72
  73  sdev_vpd_pg_attr(pg83);
  74  sdev_vpd_pg_attr(pg80);
  75 +sdev_vpd_pg_attr(pg89);
  76 +sdev_vpd_pg_attr(pg0);
  77
  78  static ssize_t show_inquiry(struct file *filep, struct kobject *kobj,
  79                             struct bin_attribute *bin_attr,
  80 @@ -1203,12 +1214,18 @@ static umode_t scsi_sdev_bin_attr_is_vis
  81         struct scsi_device *sdev = to_scsi_device(dev);
  82
  83
  84 +       if (attr == &dev_attr_vpd_pg0 && !sdev->vpd_pg0)
  85 +               return 0;
  86 +
  87         if (attr == &dev_attr_vpd_pg80 && !sdev->vpd_pg80)
  88                 return 0;
  89
  90         if (attr == &dev_attr_vpd_pg83 && !sdev->vpd_pg83)
  91                 return 0;
  92
  93 +       if (attr == &dev_attr_vpd_pg89 && !sdev->vpd_pg89)
  94 +               return 0;
  95 +
  96         return S_IRUGO;
  97  }
  98
  99 @@ -1251,8 +1268,10 @@ static struct attribute *scsi_sdev_attrs
 100  };
 101
 102  static struct bin_attribute *scsi_sdev_bin_attrs[] = {
 103 +       &dev_attr_vpd_pg0,
 104         &dev_attr_vpd_pg83,
 105         &dev_attr_vpd_pg80,
 106 +       &dev_attr_vpd_pg89,
 107         &dev_attr_inquiry,
 108         NULL
 109  };
 110 --- a/include/scsi/scsi_device.h
 111 +++ b/include/scsi/scsi_device.h
 112 @@ -140,8 +140,10 @@ struct scsi_device {
 113         const char * rev;               /* ... "nullnullnullnull" before scan */
 114
 115  #define SCSI_VPD_PG_LEN                255
 116 +       struct scsi_vpd __rcu *vpd_pg0;
 117         struct scsi_vpd __rcu *vpd_pg83;
 118         struct scsi_vpd __rcu *vpd_pg80;
 119 +       struct scsi_vpd __rcu *vpd_pg89;
 120         unsigned char current_tag;      /* current tag */
 121         struct scsi_target      *sdev_target;   /* used only for single_lun */
 122