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path: root/drivers/scsi/scsi_debug.c
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Diffstat (limited to 'drivers/scsi/scsi_debug.c')
-rw-r--r--drivers/scsi/scsi_debug.c141
1 files changed, 82 insertions, 59 deletions
diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c
index 2decc6417518..f3e9cc038d1d 100644
--- a/drivers/scsi/scsi_debug.c
+++ b/drivers/scsi/scsi_debug.c
@@ -64,6 +64,7 @@ static const char * scsi_debug_version_date = "20100324";
/* Additional Sense Code (ASC) */
#define NO_ADDITIONAL_SENSE 0x0
#define LOGICAL_UNIT_NOT_READY 0x4
+#define LOGICAL_UNIT_COMMUNICATION_FAILURE 0x8
#define UNRECOVERED_READ_ERR 0x11
#define PARAMETER_LIST_LENGTH_ERR 0x1a
#define INVALID_OPCODE 0x20
@@ -195,6 +196,7 @@ static unsigned int scsi_debug_unmap_max_blocks = DEF_UNMAP_MAX_BLOCKS;
static unsigned int scsi_debug_unmap_max_desc = DEF_UNMAP_MAX_DESC;
static unsigned int scsi_debug_write_same_length = DEF_WRITESAME_LENGTH;
static bool scsi_debug_removable = DEF_REMOVABLE;
+static bool scsi_debug_clustering;
static int scsi_debug_cmnd_count = 0;
@@ -1780,7 +1782,6 @@ static int dif_verify(struct sd_dif_tuple *sdt, const void *data,
be32_to_cpu(sdt->ref_tag) != ei_lba) {
pr_err("%s: REF check failed on sector %lu\n",
__func__, (unsigned long)sector);
- dif_errors++;
return 0x03;
}
return 0;
@@ -1789,23 +1790,27 @@ static int dif_verify(struct sd_dif_tuple *sdt, const void *data,
static void dif_copy_prot(struct scsi_cmnd *SCpnt, sector_t sector,
unsigned int sectors, bool read)
{
- unsigned int i, resid;
- struct scatterlist *psgl;
+ size_t resid;
void *paddr;
const void *dif_store_end = dif_storep + sdebug_store_sectors;
+ struct sg_mapping_iter miter;
/* Bytes of protection data to copy into sgl */
resid = sectors * sizeof(*dif_storep);
- scsi_for_each_prot_sg(SCpnt, psgl, scsi_prot_sg_count(SCpnt), i) {
- int len = min(psgl->length, resid);
+ sg_miter_start(&miter, scsi_prot_sglist(SCpnt),
+ scsi_prot_sg_count(SCpnt), SG_MITER_ATOMIC |
+ (read ? SG_MITER_TO_SG : SG_MITER_FROM_SG));
+
+ while (sg_miter_next(&miter) && resid > 0) {
+ size_t len = min(miter.length, resid);
void *start = dif_store(sector);
- int rest = 0;
+ size_t rest = 0;
if (dif_store_end < start + len)
rest = start + len - dif_store_end;
- paddr = kmap_atomic(sg_page(psgl)) + psgl->offset;
+ paddr = miter.addr;
if (read)
memcpy(paddr, start, len - rest);
@@ -1821,8 +1826,8 @@ static void dif_copy_prot(struct scsi_cmnd *SCpnt, sector_t sector,
sector += len / sizeof(*dif_storep);
resid -= len;
- kunmap_atomic(paddr);
}
+ sg_miter_stop(&miter);
}
static int prot_verify_read(struct scsi_cmnd *SCpnt, sector_t start_sec,
@@ -1832,7 +1837,7 @@ static int prot_verify_read(struct scsi_cmnd *SCpnt, sector_t start_sec,
struct sd_dif_tuple *sdt;
sector_t sector;
- for (i = 0; i < sectors; i++) {
+ for (i = 0; i < sectors; i++, ei_lba++) {
int ret;
sector = start_sec + i;
@@ -1846,8 +1851,6 @@ static int prot_verify_read(struct scsi_cmnd *SCpnt, sector_t start_sec,
dif_errors++;
return ret;
}
-
- ei_lba++;
}
dif_copy_prot(SCpnt, start_sec, sectors, true);
@@ -1886,17 +1889,19 @@ static int resp_read(struct scsi_cmnd *SCpnt, unsigned long long lba,
return check_condition_result;
}
+ read_lock_irqsave(&atomic_rw, iflags);
+
/* DIX + T10 DIF */
if (scsi_debug_dix && scsi_prot_sg_count(SCpnt)) {
int prot_ret = prot_verify_read(SCpnt, lba, num, ei_lba);
if (prot_ret) {
+ read_unlock_irqrestore(&atomic_rw, iflags);
mk_sense_buffer(devip, ABORTED_COMMAND, 0x10, prot_ret);
return illegal_condition_result;
}
}
- read_lock_irqsave(&atomic_rw, iflags);
ret = do_device_access(SCpnt, devip, lba, num, 0);
read_unlock_irqrestore(&atomic_rw, iflags);
if (ret == -1)
@@ -1931,55 +1936,62 @@ void dump_sector(unsigned char *buf, int len)
static int prot_verify_write(struct scsi_cmnd *SCpnt, sector_t start_sec,
unsigned int sectors, u32 ei_lba)
{
- int i, j, ret;
+ int ret;
struct sd_dif_tuple *sdt;
- struct scatterlist *dsgl;
- struct scatterlist *psgl = scsi_prot_sglist(SCpnt);
- void *daddr, *paddr;
+ void *daddr;
sector_t sector = start_sec;
int ppage_offset;
+ int dpage_offset;
+ struct sg_mapping_iter diter;
+ struct sg_mapping_iter piter;
BUG_ON(scsi_sg_count(SCpnt) == 0);
BUG_ON(scsi_prot_sg_count(SCpnt) == 0);
- ppage_offset = 0;
-
- /* For each data page */
- scsi_for_each_sg(SCpnt, dsgl, scsi_sg_count(SCpnt), i) {
- daddr = kmap_atomic(sg_page(dsgl)) + dsgl->offset;
- paddr = kmap_atomic(sg_page(psgl)) + psgl->offset;
-
- /* For each sector-sized chunk in data page */
- for (j = 0; j < dsgl->length; j += scsi_debug_sector_size) {
+ sg_miter_start(&piter, scsi_prot_sglist(SCpnt),
+ scsi_prot_sg_count(SCpnt),
+ SG_MITER_ATOMIC | SG_MITER_FROM_SG);
+ sg_miter_start(&diter, scsi_sglist(SCpnt), scsi_sg_count(SCpnt),
+ SG_MITER_ATOMIC | SG_MITER_FROM_SG);
+
+ /* For each protection page */
+ while (sg_miter_next(&piter)) {
+ dpage_offset = 0;
+ if (WARN_ON(!sg_miter_next(&diter))) {
+ ret = 0x01;
+ goto out;
+ }
+ for (ppage_offset = 0; ppage_offset < piter.length;
+ ppage_offset += sizeof(struct sd_dif_tuple)) {
/* If we're at the end of the current
- * protection page advance to the next one
+ * data page advance to the next one
*/
- if (ppage_offset >= psgl->length) {
- kunmap_atomic(paddr);
- psgl = sg_next(psgl);
- BUG_ON(psgl == NULL);
- paddr = kmap_atomic(sg_page(psgl))
- + psgl->offset;
- ppage_offset = 0;
+ if (dpage_offset >= diter.length) {
+ if (WARN_ON(!sg_miter_next(&diter))) {
+ ret = 0x01;
+ goto out;
+ }
+ dpage_offset = 0;
}
- sdt = paddr + ppage_offset;
+ sdt = piter.addr + ppage_offset;
+ daddr = diter.addr + dpage_offset;
- ret = dif_verify(sdt, daddr + j, sector, ei_lba);
+ ret = dif_verify(sdt, daddr, sector, ei_lba);
if (ret) {
- dump_sector(daddr + j, scsi_debug_sector_size);
+ dump_sector(daddr, scsi_debug_sector_size);
goto out;
}
sector++;
ei_lba++;
- ppage_offset += sizeof(struct sd_dif_tuple);
+ dpage_offset += scsi_debug_sector_size;
}
-
- kunmap_atomic(paddr);
- kunmap_atomic(daddr);
+ diter.consumed = dpage_offset;
+ sg_miter_stop(&diter);
}
+ sg_miter_stop(&piter);
dif_copy_prot(SCpnt, start_sec, sectors, false);
dix_writes++;
@@ -1988,8 +2000,8 @@ static int prot_verify_write(struct scsi_cmnd *SCpnt, sector_t start_sec,
out:
dif_errors++;
- kunmap_atomic(paddr);
- kunmap_atomic(daddr);
+ sg_miter_stop(&diter);
+ sg_miter_stop(&piter);
return ret;
}
@@ -2089,17 +2101,19 @@ static int resp_write(struct scsi_cmnd *SCpnt, unsigned long long lba,
if (ret)
return ret;
+ write_lock_irqsave(&atomic_rw, iflags);
+
/* DIX + T10 DIF */
if (scsi_debug_dix && scsi_prot_sg_count(SCpnt)) {
int prot_ret = prot_verify_write(SCpnt, lba, num, ei_lba);
if (prot_ret) {
+ write_unlock_irqrestore(&atomic_rw, iflags);
mk_sense_buffer(devip, ILLEGAL_REQUEST, 0x10, prot_ret);
return illegal_condition_result;
}
}
- write_lock_irqsave(&atomic_rw, iflags);
ret = do_device_access(SCpnt, devip, lba, num, 1);
if (scsi_debug_lbp())
map_region(lba, num);
@@ -2178,6 +2192,7 @@ static int resp_unmap(struct scsi_cmnd * scmd, struct sdebug_dev_info * devip)
struct unmap_block_desc *desc;
unsigned int i, payload_len, descriptors;
int ret;
+ unsigned long iflags;
ret = check_readiness(scmd, 1, devip);
if (ret)
@@ -2199,6 +2214,8 @@ static int resp_unmap(struct scsi_cmnd * scmd, struct sdebug_dev_info * devip)
desc = (void *)&buf[8];
+ write_lock_irqsave(&atomic_rw, iflags);
+
for (i = 0 ; i < descriptors ; i++) {
unsigned long long lba = get_unaligned_be64(&desc[i].lba);
unsigned int num = get_unaligned_be32(&desc[i].blocks);
@@ -2213,6 +2230,7 @@ static int resp_unmap(struct scsi_cmnd * scmd, struct sdebug_dev_info * devip)
ret = 0;
out:
+ write_unlock_irqrestore(&atomic_rw, iflags);
kfree(buf);
return ret;
@@ -2313,36 +2331,37 @@ static int resp_report_luns(struct scsi_cmnd * scp,
static int resp_xdwriteread(struct scsi_cmnd *scp, unsigned long long lba,
unsigned int num, struct sdebug_dev_info *devip)
{
- int i, j, ret = -1;
+ int j;
unsigned char *kaddr, *buf;
unsigned int offset;
- struct scatterlist *sg;
struct scsi_data_buffer *sdb = scsi_in(scp);
+ struct sg_mapping_iter miter;
/* better not to use temporary buffer. */
buf = kmalloc(scsi_bufflen(scp), GFP_ATOMIC);
- if (!buf)
- return ret;
+ if (!buf) {
+ mk_sense_buffer(devip, NOT_READY,
+ LOGICAL_UNIT_COMMUNICATION_FAILURE, 0);
+ return check_condition_result;
+ }
scsi_sg_copy_to_buffer(scp, buf, scsi_bufflen(scp));
offset = 0;
- for_each_sg(sdb->table.sgl, sg, sdb->table.nents, i) {
- kaddr = (unsigned char *)kmap_atomic(sg_page(sg));
- if (!kaddr)
- goto out;
+ sg_miter_start(&miter, sdb->table.sgl, sdb->table.nents,
+ SG_MITER_ATOMIC | SG_MITER_TO_SG);
- for (j = 0; j < sg->length; j++)
- *(kaddr + sg->offset + j) ^= *(buf + offset + j);
+ while (sg_miter_next(&miter)) {
+ kaddr = miter.addr;
+ for (j = 0; j < miter.length; j++)
+ *(kaddr + j) ^= *(buf + offset + j);
- offset += sg->length;
- kunmap_atomic(kaddr);
+ offset += miter.length;
}
- ret = 0;
-out:
+ sg_miter_stop(&miter);
kfree(buf);
- return ret;
+ return 0;
}
/* When timer goes off this function is called. */
@@ -2744,6 +2763,7 @@ static int schedule_resp(struct scsi_cmnd * cmnd,
*/
module_param_named(add_host, scsi_debug_add_host, int, S_IRUGO | S_IWUSR);
module_param_named(ato, scsi_debug_ato, int, S_IRUGO);
+module_param_named(clustering, scsi_debug_clustering, bool, S_IRUGO | S_IWUSR);
module_param_named(delay, scsi_debug_delay, int, S_IRUGO | S_IWUSR);
module_param_named(dev_size_mb, scsi_debug_dev_size_mb, int, S_IRUGO);
module_param_named(dif, scsi_debug_dif, int, S_IRUGO);
@@ -2787,6 +2807,7 @@ MODULE_VERSION(SCSI_DEBUG_VERSION);
MODULE_PARM_DESC(add_host, "0..127 hosts allowed(def=1)");
MODULE_PARM_DESC(ato, "application tag ownership: 0=disk 1=host (def=1)");
+MODULE_PARM_DESC(clustering, "when set enables larger transfers (def=0)");
MODULE_PARM_DESC(delay, "# of jiffies to delay response(def=1)");
MODULE_PARM_DESC(dev_size_mb, "size in MB of ram shared by devs(def=8)");
MODULE_PARM_DESC(dif, "data integrity field type: 0-3 (def=0)");
@@ -3248,7 +3269,7 @@ static struct attribute *sdebug_drv_attrs[] = {
};
ATTRIBUTE_GROUPS(sdebug_drv);
-struct device *pseudo_primary;
+static struct device *pseudo_primary;
static int __init scsi_debug_init(void)
{
@@ -3934,6 +3955,8 @@ static int sdebug_driver_probe(struct device * dev)
sdbg_host = to_sdebug_host(dev);
sdebug_driver_template.can_queue = scsi_debug_max_queue;
+ if (scsi_debug_clustering)
+ sdebug_driver_template.use_clustering = ENABLE_CLUSTERING;
hpnt = scsi_host_alloc(&sdebug_driver_template, sizeof(sdbg_host));
if (NULL == hpnt) {
printk(KERN_ERR "%s: scsi_register failed\n", __func__);
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-27 14:02:10 +0300