1 files changed, 77 insertions, 48 deletions

diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c
index b02bdc6c2cd1..2c36bae3bd4b 100644
--- a/drivers/scsi/scsi_debug.c
+++ b/drivers/scsi/scsi_debug.c
@@ -109,10 +109,12 @@ static const char * scsi_debug_version_date = "20100324";
 #define DEF_PHYSBLK_EXP 0
 #define DEF_LOWEST_ALIGNED 0
 #define DEF_OPT_BLKS 64
-#define DEF_UNMAP_MAX_BLOCKS 0
-#define DEF_UNMAP_MAX_DESC 0
-#define DEF_UNMAP_GRANULARITY 0
+#define DEF_UNMAP_MAX_BLOCKS 0xFFFFFFFF
+#define DEF_UNMAP_MAX_DESC 256
+#define DEF_UNMAP_GRANULARITY 1
 #define DEF_UNMAP_ALIGNMENT 0
+#define DEF_TPWS 0
+#define DEF_TPU 0
 
 /* bit mask values for scsi_debug_opts */
 #define SCSI_DEBUG_OPT_NOISE   1
@@ -177,10 +179,12 @@ static int scsi_debug_ato = DEF_ATO;
 static int scsi_debug_physblk_exp = DEF_PHYSBLK_EXP;
 static int scsi_debug_lowest_aligned = DEF_LOWEST_ALIGNED;
 static int scsi_debug_opt_blks = DEF_OPT_BLKS;
-static int scsi_debug_unmap_max_desc = DEF_UNMAP_MAX_DESC;
-static int scsi_debug_unmap_max_blocks = DEF_UNMAP_MAX_BLOCKS;
-static int scsi_debug_unmap_granularity = DEF_UNMAP_GRANULARITY;
-static int scsi_debug_unmap_alignment = DEF_UNMAP_ALIGNMENT;
+static unsigned int scsi_debug_unmap_max_desc = DEF_UNMAP_MAX_DESC;
+static unsigned int scsi_debug_unmap_max_blocks = DEF_UNMAP_MAX_BLOCKS;
+static unsigned int scsi_debug_unmap_granularity = DEF_UNMAP_GRANULARITY;
+static unsigned int scsi_debug_unmap_alignment = DEF_UNMAP_ALIGNMENT;
+static unsigned int scsi_debug_tpws = DEF_TPWS;
+static unsigned int scsi_debug_tpu = DEF_TPU;
 
 static int scsi_debug_cmnd_count = 0;
 
@@ -723,16 +727,9 @@ static int inquiry_evpd_b0(unsigned char * arr)
         /* Optimal Transfer Length */
         put_unaligned_be32(scsi_debug_opt_blks, &arr[8]);
 
-        if (scsi_debug_unmap_max_desc) {
-                unsigned int blocks;
-
-                if (scsi_debug_unmap_max_blocks)
-                        blocks = scsi_debug_unmap_max_blocks;
-                else
-                        blocks = 0xffffffff;
-
+        if (scsi_debug_tpu) {
                 /* Maximum Unmap LBA Count */
-                put_unaligned_be32(blocks, &arr[16]);
+                put_unaligned_be32(scsi_debug_unmap_max_blocks, &arr[16]);
 
                 /* Maximum Unmap Block Descriptor Count */
                 put_unaligned_be32(scsi_debug_unmap_max_desc, &arr[20]);
@@ -745,10 +742,9 @@ static int inquiry_evpd_b0(unsigned char * arr)
         }
 
         /* Optimal Unmap Granularity */
-        if (scsi_debug_unmap_granularity) {
-                put_unaligned_be32(scsi_debug_unmap_granularity, &arr[24]);
-                return 0x3c; /* Mandatory page length for thin provisioning */
-        }
+        put_unaligned_be32(scsi_debug_unmap_granularity, &arr[24]);
+
+        return 0x3c; /* Mandatory page length for thin provisioning */
 
         return sizeof(vpdb0_data);
 }
@@ -765,6 +761,21 @@ static int inquiry_evpd_b1(unsigned char *arr)
         return 0x3c;
 }
 
+/* Thin provisioning VPD page (SBC-3) */
+static int inquiry_evpd_b2(unsigned char *arr)
+{
+        memset(arr, 0, 0x8);
+        arr[0] = 0;                     /* threshold exponent */
+
+        if (scsi_debug_tpu)
+                arr[1] = 1 << 7;
+
+        if (scsi_debug_tpws)
+                arr[1] |= 1 << 6;
+
+        return 0x8;
+}
+
 #define SDEBUG_LONG_INQ_SZ 96
 #define SDEBUG_MAX_INQ_ARR_SZ 584
 
@@ -820,6 +831,7 @@ static int resp_inquiry(struct scsi_cmnd * scp, int target,
                         arr[n++] = 0x89;  /* ATA information */
                         arr[n++] = 0xb0;  /* Block limits (SBC) */
                         arr[n++] = 0xb1;  /* Block characteristics (SBC) */
+                        arr[n++] = 0xb2;  /* Thin provisioning (SBC) */
                         arr[3] = n - 4;   /* number of supported VPD pages */
                 } else if (0x80 == cmd[2]) { /* unit serial number */
                         arr[1] = cmd[2];        /*sanity */
@@ -867,6 +879,9 @@ static int resp_inquiry(struct scsi_cmnd * scp, int target,
                 } else if (0xb1 == cmd[2]) { /* Block characteristics (SBC) */
                         arr[1] = cmd[2];        /*sanity */
                         arr[3] = inquiry_evpd_b1(&arr[4]);
+                } else if (0xb2 == cmd[2]) { /* Thin provisioning (SBC) */
+                        arr[1] = cmd[2];        /*sanity */
+                        arr[3] = inquiry_evpd_b2(&arr[4]);
                 } else {
                         /* Illegal request, invalid field in cdb */
                         mk_sense_buffer(devip, ILLEGAL_REQUEST,
@@ -1038,7 +1053,7 @@ static int resp_readcap16(struct scsi_cmnd * scp,
         arr[13] = scsi_debug_physblk_exp & 0xf;
         arr[14] = (scsi_debug_lowest_aligned >> 8) & 0x3f;
 
-        if (scsi_debug_unmap_granularity)
+        if (scsi_debug_tpu || scsi_debug_tpws)
                 arr[14] |= 0x80; /* TPE */
 
         arr[15] = scsi_debug_lowest_aligned & 0xff;
@@ -2708,6 +2723,8 @@ module_param_named(unmap_max_blocks, scsi_debug_unmap_max_blocks, int, S_IRUGO);
 module_param_named(unmap_max_desc, scsi_debug_unmap_max_desc, int, S_IRUGO);
 module_param_named(unmap_granularity, scsi_debug_unmap_granularity, int, S_IRUGO);
 module_param_named(unmap_alignment, scsi_debug_unmap_alignment, int, S_IRUGO);
+module_param_named(tpu, scsi_debug_tpu, int, S_IRUGO);
+module_param_named(tpws, scsi_debug_tpws, int, S_IRUGO);
 
 MODULE_AUTHOR("Eric Youngdale + Douglas Gilbert");
 MODULE_DESCRIPTION("SCSI debug adapter driver");
@@ -2739,10 +2756,12 @@ MODULE_PARM_DESC(dix, "data integrity extensions mask (def=0)");
 MODULE_PARM_DESC(dif, "data integrity field type: 0-3 (def=0)");
 MODULE_PARM_DESC(guard, "protection checksum: 0=crc, 1=ip (def=0)");
 MODULE_PARM_DESC(ato, "application tag ownership: 0=disk 1=host (def=1)");
-MODULE_PARM_DESC(unmap_max_blocks, "max # of blocks can be unmapped in one cmd (def=0)");
-MODULE_PARM_DESC(unmap_max_desc, "max # of ranges that can be unmapped in one cmd (def=0)");
-MODULE_PARM_DESC(unmap_granularity, "thin provisioning granularity in blocks (def=0)");
+MODULE_PARM_DESC(unmap_max_blocks, "max # of blocks can be unmapped in one cmd (def=0xffffffff)");
+MODULE_PARM_DESC(unmap_max_desc, "max # of ranges that can be unmapped in one cmd (def=256)");
+MODULE_PARM_DESC(unmap_granularity, "thin provisioning granularity in blocks (def=1)");
 MODULE_PARM_DESC(unmap_alignment, "lowest aligned thin provisioning lba (def=0)");
+MODULE_PARM_DESC(tpu, "enable TP, support UNMAP command (def=0)");
+MODULE_PARM_DESC(tpws, "enable TP, support WRITE SAME(16) with UNMAP bit (def=0)");
 
 static char sdebug_info[256];
 
@@ -3130,7 +3149,7 @@ static ssize_t sdebug_map_show(struct device_driver *ddp, char *buf)
 {
         ssize_t count;
 
-        if (scsi_debug_unmap_granularity == 0)
+        if (scsi_debug_tpu == 0 && scsi_debug_tpws == 0)
                 return scnprintf(buf, PAGE_SIZE, "0-%u\n",
                                  sdebug_store_sectors);
 
@@ -3207,16 +3226,7 @@ static void do_remove_driverfs_files(void)
         driver_remove_file(&sdebug_driverfs_driver, &driver_attr_add_host);
 }
 
-static void pseudo_0_release(struct device *dev)
-{
-        if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
-                printk(KERN_INFO "scsi_debug: pseudo_0_release() called\n");
-}
-
-static struct device pseudo_primary = {
-        .init_name      = "pseudo_0",
-        .release        = pseudo_0_release,
-};
+struct device *pseudo_primary;
 
 static int __init scsi_debug_init(void)
 {
@@ -3322,10 +3332,21 @@ static int __init scsi_debug_init(void)
                 memset(dif_storep, 0xff, dif_size);
         }
 
-        if (scsi_debug_unmap_granularity) {
+        /* Thin Provisioning */
+        if (scsi_debug_tpu || scsi_debug_tpws) {
                 unsigned int map_bytes;
 
-                if (scsi_debug_unmap_granularity < scsi_debug_unmap_alignment) {
+                scsi_debug_unmap_max_blocks =
+                        clamp(scsi_debug_unmap_max_blocks, 0U, 0xffffffffU);
+
+                scsi_debug_unmap_max_desc =
+                        clamp(scsi_debug_unmap_max_desc, 0U, 256U);
+
+                scsi_debug_unmap_granularity =
+                        clamp(scsi_debug_unmap_granularity, 1U, 0xffffffffU);
+
+                if (scsi_debug_unmap_alignment &&
+                    scsi_debug_unmap_granularity < scsi_debug_unmap_alignment) {
                         printk(KERN_ERR
                                "%s: ERR: unmap_granularity < unmap_alignment\n",
                                __func__);
@@ -3352,10 +3373,10 @@ static int __init scsi_debug_init(void)
                         map_region(0, 2);
         }
 
-        ret = device_register(&pseudo_primary);
-        if (ret < 0) {
-                printk(KERN_WARNING "scsi_debug: device_register error: %d\n",
-                        ret);
+        pseudo_primary = root_device_register("pseudo_0");
+        if (IS_ERR(pseudo_primary)) {
+                printk(KERN_WARNING "scsi_debug: root_device_register() error\n");
+                ret = PTR_ERR(pseudo_primary);
                 goto free_vm;
         }
         ret = bus_register(&pseudo_lld_bus);
@@ -3402,7 +3423,7 @@ del_files:
 bus_unreg:
         bus_unregister(&pseudo_lld_bus);
 dev_unreg:
-        device_unregister(&pseudo_primary);
+        root_device_unregister(pseudo_primary);
 free_vm:
         if (map_storep)
                 vfree(map_storep);
@@ -3423,7 +3444,7 @@ static void __exit scsi_debug_exit(void)
         do_remove_driverfs_files();
         driver_unregister(&sdebug_driverfs_driver);
         bus_unregister(&pseudo_lld_bus);
-        device_unregister(&pseudo_primary);
+        root_device_unregister(pseudo_primary);
 
         if (dif_storep)
                 vfree(dif_storep);
@@ -3474,7 +3495,7 @@ static int sdebug_add_adapter(void)
         spin_unlock(&sdebug_host_list_lock);
 
         sdbg_host->dev.bus = &pseudo_lld_bus;
-        sdbg_host->dev.parent = &pseudo_primary;
+        sdbg_host->dev.parent = pseudo_primary;
         sdbg_host->dev.release = &sdebug_release_adapter;
         dev_set_name(&sdbg_host->dev, "adapter%d", scsi_debug_add_host);
 
@@ -3642,7 +3663,7 @@ int scsi_debug_queuecommand(struct scsi_cmnd *SCpnt, done_funct_t done)
                         errsts = resp_readcap16(SCpnt, devip);
                 else if (cmd[1] == SAI_GET_LBA_STATUS) {
 
-                        if (scsi_debug_unmap_max_desc == 0) {
+                        if (scsi_debug_tpu == 0 && scsi_debug_tpws == 0) {
                                 mk_sense_buffer(devip, ILLEGAL_REQUEST,
                                                 INVALID_COMMAND_OPCODE, 0);
                                 errsts = check_condition_result;
@@ -3753,8 +3774,16 @@ write:
                 }
                 break;
         case WRITE_SAME_16:
-                if (cmd[1] & 0x8)
-                        unmap = 1;
+                if (cmd[1] & 0x8) {
+                        if (scsi_debug_tpws == 0) {
+                                mk_sense_buffer(devip, ILLEGAL_REQUEST,
+                                                INVALID_FIELD_IN_CDB, 0);
+                                errsts = check_condition_result;
+                        } else
+                                unmap = 1;
+                }
+                if (errsts)
+                        break;
                 /* fall through */
         case WRITE_SAME:
                 errsts = check_readiness(SCpnt, 0, devip);
@@ -3768,7 +3797,7 @@ write:
                 if (errsts)
                         break;
 
-                if (scsi_debug_unmap_max_desc == 0) {
+                if (scsi_debug_unmap_max_desc == 0 || scsi_debug_tpu == 0) {
                         mk_sense_buffer(devip, ILLEGAL_REQUEST,
                                         INVALID_COMMAND_OPCODE, 0);
                         errsts = check_condition_result;