Revision 3e1a0699095803e53072699a4a1485af7744601d authored by Joe Thornber on 03 March 2014, 16:03:26 UTC, committed by Mike Snitzer on 05 March 2014, 20:26:58 UTC
Ideally a thin pool would never run out of data space; the low water mark would trigger userland to extend the pool before we completely run out of space. However, many small random IOs to unprovisioned space can consume data space at an alarming rate. Adjust your low water mark if you're frequently seeing "out-of-data-space" mode. Before this fix, if data space ran out the pool would be put in PM_READ_ONLY mode which also aborted the pool's current metadata transaction (data loss for any changes in the transaction). This had a side-effect of needlessly compromising data consistency. And retry of queued unserviceable bios, once the data pool was resized, could initiate changes to potentially inconsistent pool metadata. Now when the pool's data space is exhausted transition to a new pool mode (PM_OUT_OF_DATA_SPACE) that allows metadata to be changed but data may not be allocated. This allows users to remove thin volumes or discard data to recover data space. The pool is no longer put in PM_READ_ONLY mode in response to the pool running out of data space. And PM_READ_ONLY mode no longer aborts the pool's current metadata transaction. Also, set_pool_mode() will now notify userspace when the pool mode is changed. Signed-off-by: Joe Thornber <ejt@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
1 parent 07f2b6e
nsp32_debug.c
/*
* Workbit NinjaSCSI-32Bi/UDE PCI/CardBus SCSI Host Bus Adapter driver
* Debug routine
*
* This software may be used and distributed according to the terms of
* the GNU General Public License.
*/
/*
* Show the command data of a command
*/
static const char unknown[] = "UNKNOWN";
static const char * group_0_commands[] = {
/* 00-03 */ "Test Unit Ready", "Rezero Unit", unknown, "Request Sense",
/* 04-07 */ "Format Unit", "Read Block Limits", unknown, "Reassign Blocks",
/* 08-0d */ "Read (6)", unknown, "Write (6)", "Seek (6)", unknown, unknown,
/* 0e-12 */ unknown, "Read Reverse", "Write Filemarks", "Space", "Inquiry",
/* 13-16 */ unknown, "Recover Buffered Data", "Mode Select", "Reserve",
/* 17-1b */ "Release", "Copy", "Erase", "Mode Sense", "Start/Stop Unit",
/* 1c-1d */ "Receive Diagnostic", "Send Diagnostic",
/* 1e-1f */ "Prevent/Allow Medium Removal", unknown,
};
static const char *group_1_commands[] = {
/* 20-22 */ unknown, unknown, unknown,
/* 23-28 */ unknown, unknown, "Read Capacity", unknown, unknown, "Read (10)",
/* 29-2d */ unknown, "Write (10)", "Seek (10)", unknown, unknown,
/* 2e-31 */ "Write Verify","Verify", "Search High", "Search Equal",
/* 32-34 */ "Search Low", "Set Limits", "Prefetch or Read Position",
/* 35-37 */ "Synchronize Cache","Lock/Unlock Cache", "Read Defect Data",
/* 38-3c */ "Medium Scan", "Compare","Copy Verify", "Write Buffer", "Read Buffer",
/* 3d-3f */ "Update Block", "Read Long", "Write Long",
};
static const char *group_2_commands[] = {
/* 40-41 */ "Change Definition", "Write Same",
/* 42-48 */ "Read Sub-Ch(cd)", "Read TOC", "Read Header(cd)", "Play Audio(cd)", unknown, "Play Audio MSF(cd)", "Play Audio Track/Index(cd)",
/* 49-4f */ "Play Track Relative(10)(cd)", unknown, "Pause/Resume(cd)", "Log Select", "Log Sense", unknown, unknown,
/* 50-55 */ unknown, unknown, unknown, unknown, unknown, "Mode Select (10)",
/* 56-5b */ unknown, unknown, unknown, unknown, "Mode Sense (10)", unknown,
/* 5c-5f */ unknown, unknown, unknown,
};
#define group(opcode) (((opcode) >> 5) & 7)
#define RESERVED_GROUP 0
#define VENDOR_GROUP 1
#define NOTEXT_GROUP 2
static const char **commands[] = {
group_0_commands, group_1_commands, group_2_commands,
(const char **) RESERVED_GROUP, (const char **) RESERVED_GROUP,
(const char **) NOTEXT_GROUP, (const char **) VENDOR_GROUP,
(const char **) VENDOR_GROUP
};
static const char reserved[] = "RESERVED";
static const char vendor[] = "VENDOR SPECIFIC";
static void print_opcodek(unsigned char opcode)
{
const char **table = commands[ group(opcode) ];
switch ((unsigned long) table) {
case RESERVED_GROUP:
printk("%s[%02x] ", reserved, opcode);
break;
case NOTEXT_GROUP:
printk("%s(notext)[%02x] ", unknown, opcode);
break;
case VENDOR_GROUP:
printk("%s[%02x] ", vendor, opcode);
break;
default:
if (table[opcode & 0x1f] != unknown)
printk("%s[%02x] ", table[opcode & 0x1f], opcode);
else
printk("%s[%02x] ", unknown, opcode);
break;
}
}
static void print_commandk (unsigned char *command)
{
int i,s;
// printk(KERN_DEBUG);
print_opcodek(command[0]);
/*printk(KERN_DEBUG "%s ", __func__);*/
if ((command[0] >> 5) == 6 ||
(command[0] >> 5) == 7 ) {
s = 12; /* vender specific */
} else {
s = COMMAND_SIZE(command[0]);
}
for ( i = 1; i < s; ++i) {
printk("%02x ", command[i]);
}
switch (s) {
case 6:
printk("LBA=%d len=%d",
(((unsigned int)command[1] & 0x0f) << 16) |
( (unsigned int)command[2] << 8) |
( (unsigned int)command[3] ),
(unsigned int)command[4]
);
break;
case 10:
printk("LBA=%d len=%d",
((unsigned int)command[2] << 24) |
((unsigned int)command[3] << 16) |
((unsigned int)command[4] << 8) |
((unsigned int)command[5] ),
((unsigned int)command[7] << 8) |
((unsigned int)command[8] )
);
break;
case 12:
printk("LBA=%d len=%d",
((unsigned int)command[2] << 24) |
((unsigned int)command[3] << 16) |
((unsigned int)command[4] << 8) |
((unsigned int)command[5] ),
((unsigned int)command[6] << 24) |
((unsigned int)command[7] << 16) |
((unsigned int)command[8] << 8) |
((unsigned int)command[9] )
);
break;
default:
break;
}
printk("\n");
}
static void show_command(Scsi_Cmnd *SCpnt)
{
print_commandk(SCpnt->cmnd);
}
static void show_busphase(unsigned char stat)
{
switch(stat) {
case BUSPHASE_COMMAND:
printk( "BUSPHASE_COMMAND\n");
break;
case BUSPHASE_MESSAGE_IN:
printk( "BUSPHASE_MESSAGE_IN\n");
break;
case BUSPHASE_MESSAGE_OUT:
printk( "BUSPHASE_MESSAGE_OUT\n");
break;
case BUSPHASE_DATA_IN:
printk( "BUSPHASE_DATA_IN\n");
break;
case BUSPHASE_DATA_OUT:
printk( "BUSPHASE_DATA_OUT\n");
break;
case BUSPHASE_STATUS:
printk( "BUSPHASE_STATUS\n");
break;
case BUSPHASE_SELECT:
printk( "BUSPHASE_SELECT\n");
break;
default:
printk( "BUSPHASE_other: 0x%x\n", stat);
break;
}
}
static void show_autophase(unsigned short i)
{
printk("auto: 0x%x,", i);
if(i & COMMAND_PHASE) {
printk(" cmd");
}
if(i & DATA_IN_PHASE) {
printk(" din");
}
if(i & DATA_OUT_PHASE) {
printk(" dout");
}
if(i & MSGOUT_PHASE) {
printk(" mout");
}
if(i & STATUS_PHASE) {
printk(" stat");
}
if(i & ILLEGAL_PHASE) {
printk(" ill");
}
if(i & BUS_FREE_OCCUER) {
printk(" bfree-o");
}
if(i & MSG_IN_OCCUER) {
printk(" min-o");
}
if(i & MSG_OUT_OCCUER) {
printk(" mout-o");
}
if(i & SELECTION_TIMEOUT) {
printk(" sel");
}
if(i & MSGIN_00_VALID) {
printk(" m0");
}
if(i & MSGIN_02_VALID) {
printk(" m2");
}
if(i & MSGIN_03_VALID) {
printk(" m3");
}
if(i & MSGIN_04_VALID) {
printk(" m4");
}
if(i & AUTOSCSI_BUSY) {
printk(" busy");
}
printk("\n");
}
static void nsp32_print_register(int base)
{
if (!(NSP32_DEBUG_MASK & NSP32_SPECIAL_PRINT_REGISTER))
return;
printk("Phase=0x%x, ", nsp32_read1(base, SCSI_BUS_MONITOR));
printk("OldPhase=0x%x, ", nsp32_index_read1(base, OLD_SCSI_PHASE));
printk("syncreg=0x%x, ", nsp32_read1(base, SYNC_REG));
printk("ackwidth=0x%x, ", nsp32_read1(base, ACK_WIDTH));
printk("sgtpaddr=0x%lx, ", nsp32_read4(base, SGT_ADR));
printk("scsioutlatch=0x%x, ", nsp32_read1(base, SCSI_OUT_LATCH_TARGET_ID));
printk("msgout=0x%lx, ", nsp32_read4(base, SCSI_MSG_OUT));
printk("miscrd=0x%x, ", nsp32_index_read2(base, MISC_WR));
printk("seltimeout=0x%x, ", nsp32_read2(base, SEL_TIME_OUT));
printk("sreqrate=0x%x, ", nsp32_read1(base, SREQ_SMPL_RATE));
printk("transStatus=0x%x, ", nsp32_read2(base, TRANSFER_STATUS));
printk("reselectid=0x%x, ", nsp32_read2(base, COMMAND_CONTROL));
printk("arbit=0x%x, ", nsp32_read1(base, ARBIT_STATUS));
printk("BmStart=0x%lx, ", nsp32_read4(base, BM_START_ADR));
printk("BmCount=0x%lx, ", nsp32_read4(base, BM_CNT));
printk("SackCnt=0x%lx, ", nsp32_read4(base, SACK_CNT));
printk("SReqCnt=0x%lx, ", nsp32_read4(base, SREQ_CNT));
printk("SavedSackCnt=0x%lx, ", nsp32_read4(base, SAVED_SACK_CNT));
printk("ScsiBusControl=0x%x, ", nsp32_read1(base, SCSI_BUS_CONTROL));
printk("FifoRestCnt=0x%x, ", nsp32_read2(base, FIFO_REST_CNT));
printk("CdbIn=0x%x, ", nsp32_read1(base, SCSI_CSB_IN));
printk("\n");
if (0) {
printk("execph=0x%x, ", nsp32_read2(base, SCSI_EXECUTE_PHASE));
printk("IrqStatus=0x%x, ", nsp32_read2(base, IRQ_STATUS));
printk("\n");
}
}
/* end */
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