return ret;
}
-static unsigned int map_state(sector_t lba, unsigned int *num)
+static unsigned long lba_to_map_index(sector_t lba)
+{
+ if (scsi_debug_unmap_alignment) {
+ lba += scsi_debug_unmap_granularity -
+ scsi_debug_unmap_alignment;
+ }
+ do_div(lba, scsi_debug_unmap_granularity);
+
+ return lba;
+}
+
+static sector_t map_index_to_lba(unsigned long index)
{
- unsigned int granularity, alignment, mapped;
- sector_t block, next, end;
+ return index * scsi_debug_unmap_granularity -
+ scsi_debug_unmap_alignment;
+}
- granularity = scsi_debug_unmap_granularity;
- alignment = granularity - scsi_debug_unmap_alignment;
- block = lba + alignment;
- do_div(block, granularity);
+static unsigned int map_state(sector_t lba, unsigned int *num)
+{
+ sector_t end;
+ unsigned int mapped;
+ unsigned long index;
+ unsigned long next;
- mapped = test_bit(block, map_storep);
+ index = lba_to_map_index(lba);
+ mapped = test_bit(index, map_storep);
if (mapped)
- next = find_next_zero_bit(map_storep, map_size, block);
+ next = find_next_zero_bit(map_storep, map_size, index);
else
- next = find_next_bit(map_storep, map_size, block);
+ next = find_next_bit(map_storep, map_size, index);
- end = next * granularity - scsi_debug_unmap_alignment;
+ end = min_t(sector_t, sdebug_store_sectors, map_index_to_lba(next));
*num = end - lba;
return mapped;
static void map_region(sector_t lba, unsigned int len)
{
- unsigned int granularity, alignment;
sector_t end = lba + len;
- granularity = scsi_debug_unmap_granularity;
- alignment = granularity - scsi_debug_unmap_alignment;
-
while (lba < end) {
- sector_t block, rem;
+ unsigned long index = lba_to_map_index(lba);
- block = lba + alignment;
- rem = do_div(block, granularity);
+ if (index < map_size)
+ set_bit(index, map_storep);
- if (block < map_size)
- set_bit(block, map_storep);
-
- lba += granularity - rem;
+ lba = map_index_to_lba(index + 1);
}
}
static void unmap_region(sector_t lba, unsigned int len)
{
- unsigned int granularity, alignment;
sector_t end = lba + len;
- granularity = scsi_debug_unmap_granularity;
- alignment = granularity - scsi_debug_unmap_alignment;
-
while (lba < end) {
- sector_t block, rem;
-
- block = lba + alignment;
- rem = do_div(block, granularity);
+ unsigned long index = lba_to_map_index(lba);
- if (rem == 0 && lba + granularity < end && block < map_size) {
- clear_bit(block, map_storep);
- if (scsi_debug_lbprz)
+ if (lba == map_index_to_lba(index) &&
+ lba + scsi_debug_unmap_granularity <= end &&
+ index < map_size) {
+ clear_bit(index, map_storep);
+ if (scsi_debug_lbprz) {
memset(fake_storep +
- block * scsi_debug_sector_size, 0,
- scsi_debug_sector_size);
+ lba * scsi_debug_sector_size, 0,
+ scsi_debug_sector_size *
+ scsi_debug_unmap_granularity);
+ }
}
- lba += granularity - rem;
+ lba = map_index_to_lba(index + 1);
}
}
write_lock_irqsave(&atomic_rw, iflags);
ret = do_device_access(SCpnt, devip, lba, num, 1);
- if (scsi_debug_unmap_granularity)
+ if (scsi_debug_lbp())
map_region(lba, num);
write_unlock_irqrestore(&atomic_rw, iflags);
if (-1 == ret)
write_lock_irqsave(&atomic_rw, iflags);
- if (unmap && scsi_debug_unmap_granularity) {
+ if (unmap && scsi_debug_lbp()) {
unmap_region(lba, num);
goto out;
}
fake_storep + (lba * scsi_debug_sector_size),
scsi_debug_sector_size);
- if (scsi_debug_unmap_granularity)
+ if (scsi_debug_lbp())
map_region(lba, num);
out:
write_unlock_irqrestore(&atomic_rw, iflags);
/* scsi_debug_proc_info
* Used if the driver currently has no own support for /proc/scsi
*/
-static int scsi_debug_proc_info(struct Scsi_Host *host, char *buffer, char **start, off_t offset,
- int length, int inout)
+static int scsi_debug_write_info(struct Scsi_Host *host, char *buffer, int length)
{
- int len, pos, begin;
- int orig_length;
-
- orig_length = length;
+ char arr[16];
+ int opts;
+ int minLen = length > 15 ? 15 : length;
- if (inout == 1) {
- char arr[16];
- int minLen = length > 15 ? 15 : length;
+ if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
+ return -EACCES;
+ memcpy(arr, buffer, minLen);
+ arr[minLen] = '\0';
+ if (1 != sscanf(arr, "%d", &opts))
+ return -EINVAL;
+ scsi_debug_opts = opts;
+ if (scsi_debug_every_nth != 0)
+ scsi_debug_cmnd_count = 0;
+ return length;
+}
- if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
- return -EACCES;
- memcpy(arr, buffer, minLen);
- arr[minLen] = '\0';
- if (1 != sscanf(arr, "%d", &pos))
- return -EINVAL;
- scsi_debug_opts = pos;
- if (scsi_debug_every_nth != 0)
- scsi_debug_cmnd_count = 0;
- return length;
- }
- begin = 0;
- pos = len = sprintf(buffer, "scsi_debug adapter driver, version "
+static int scsi_debug_show_info(struct seq_file *m, struct Scsi_Host *host)
+{
+ seq_printf(m, "scsi_debug adapter driver, version "
"%s [%s]\n"
"num_tgts=%d, shared (ram) size=%d MB, opts=0x%x, "
"every_nth=%d(curr:%d)\n"
scsi_debug_sector_size, sdebug_cylinders_per, sdebug_heads,
sdebug_sectors_per, num_aborts, num_dev_resets, num_bus_resets,
num_host_resets, dix_reads, dix_writes, dif_errors);
- if (pos < offset) {
- len = 0;
- begin = pos;
- }
- *start = buffer + (offset - begin); /* Start of wanted data */
- len -= (offset - begin);
- if (len > length)
- len = length;
- return len;
+ return 0;
}
static ssize_t sdebug_delay_show(struct device_driver * ddp, char * buf)
/* Logical Block Provisioning */
if (scsi_debug_lbp()) {
- unsigned int map_bytes;
-
scsi_debug_unmap_max_blocks =
clamp(scsi_debug_unmap_max_blocks, 0U, 0xffffffffU);
clamp(scsi_debug_unmap_granularity, 1U, 0xffffffffU);
if (scsi_debug_unmap_alignment &&
- scsi_debug_unmap_granularity < scsi_debug_unmap_alignment) {
+ scsi_debug_unmap_granularity <=
+ scsi_debug_unmap_alignment) {
printk(KERN_ERR
- "%s: ERR: unmap_granularity < unmap_alignment\n",
+ "%s: ERR: unmap_granularity <= unmap_alignment\n",
__func__);
return -EINVAL;
}
- map_size = (sdebug_store_sectors / scsi_debug_unmap_granularity);
- map_bytes = map_size >> 3;
- map_storep = vmalloc(map_bytes);
+ map_size = lba_to_map_index(sdebug_store_sectors - 1) + 1;
+ map_storep = vmalloc(BITS_TO_LONGS(map_size) * sizeof(long));
printk(KERN_INFO "scsi_debug_init: %lu provisioning blocks\n",
map_size);
goto free_vm;
}
- memset(map_storep, 0x0, map_bytes);
+ bitmap_zero(map_storep, map_size);
/* Map first 1KB for partition table */
if (scsi_debug_num_parts)
static DEF_SCSI_QCMD(scsi_debug_queuecommand)
static struct scsi_host_template sdebug_driver_template = {
- .proc_info = scsi_debug_proc_info,
+ .show_info = scsi_debug_show_info,
+ .write_info = scsi_debug_write_info,
.proc_name = sdebug_proc_name,
.name = "SCSI DEBUG",
.info = scsi_debug_info,
projects / ~andy / linux / blobdiff