scsi: target: Report atomic values in INQUIRY

Report the atomic values in the Block Limits VPD page.

Signed-off-by: Mike Christie <michael.christie@oracle.com>
jpg: handle not having atomic_supported attribute
Signed-off-by: John Garry <john.g.garry@oracle.com>
Link: https://patch.msgid.link/20251020103820.2917593-6-john.g.garry@oracle.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/target/target_core_spc.c b/drivers/target/target_core_spc.c
index aad0096afa21ce60e68323796bec0f80f65fa5fa..ddf8104645d1e203d79c0f11bf7d22359934e1a0 100644 (file)
--- a/drivers/target/target_core_spc.c
+++ b/drivers/target/target_core_spc.c
@@ -521,7 +521,6 @@ spc_emulate_evpd_b0(struct se_cmd *cmd, unsigned char *buf)
                have_tp = 1;
 
        buf[0] = dev->transport->get_device_type(dev);
-       buf[3] = have_tp ? 0x3c : 0x10;
 
        /* Set WSNZ to 1 */
        buf[4] = 0x01;
@@ -562,11 +561,10 @@ spc_emulate_evpd_b0(struct se_cmd *cmd, unsigned char *buf)
        else
                put_unaligned_be32(dev->dev_attrib.optimal_sectors, &buf[12]);
 
-       /*
-        * Exit now if we don't support TP.
-        */
+       put_unaligned_be16(12, &buf[2]);
+
        if (!have_tp)
-               goto max_write_same;
+               goto try_atomic;
 
        /*
         * Set MAXIMUM UNMAP LBA COUNT
@@ -595,9 +593,29 @@ spc_emulate_evpd_b0(struct se_cmd *cmd, unsigned char *buf)
        /*
         * MAXIMUM WRITE SAME LENGTH
         */
-max_write_same:
        put_unaligned_be64(dev->dev_attrib.max_write_same_len, &buf[36]);
 
+       put_unaligned_be16(40, &buf[2]);
+
+try_atomic:
+       /*
+        * ATOMIC
+        */
+       if (!dev->dev_attrib.atomic_max_len)
+               goto done;
+
+       if (dev->dev_attrib.atomic_max_len < io_max_blocks)
+               put_unaligned_be32(dev->dev_attrib.atomic_max_len, &buf[44]);
+       else
+               put_unaligned_be32(io_max_blocks, &buf[44]);
+
+       put_unaligned_be32(dev->dev_attrib.atomic_alignment, &buf[48]);
+       put_unaligned_be32(dev->dev_attrib.atomic_granularity, &buf[52]);
+       put_unaligned_be32(dev->dev_attrib.atomic_max_with_boundary, &buf[56]);
+       put_unaligned_be32(dev->dev_attrib.atomic_max_boundary, &buf[60]);
+
+       put_unaligned_be16(60, &buf[2]);
+done:
        return 0;
 }