The patch titled
target: fix READ_CAPACITY_16 regression
has been removed from the -mm tree. Its filename was
target-fix-read_capacity_16-regression.patch
This patch was dropped because it was merged into mainline or a subsystem tree
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: target: fix READ_CAPACITY_16 regression
From: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx>
Fix a regression for READ_CAPACITY to trigger SAI READ_CAPACITY_16 for >=
0xffffffff virtual backends. This occured during v4.0.0-rc6 when the
backend read_capacity* handlers where moved into generic target_core_cdb.c
code, and the 'unsigned long long blocks_long' piece was dropped from
target_emulate_readcapacity().
This fix has been tested with TCM_Loop on .38-rc7 with lio-4.1 and is
working as expected with large block virtual backends:
[67826.897061] TARGET_CORE[loopback]->TPG[1]_LUN[0] - Adding READ-WRITE access for LUN in Demo Mode
[67826.897061] scsi 7:0:1:0: Direct-Access LIO-ORG FILEIO 4.0 PQ: 0 ANSI: 5
[67826.900933] sd 7:0:1:0: [sdd] 2621440000001 512-byte logical blocks: (1.34 PB/1.19 PiB)
[67826.901510] sd 7:0:1:0: [sdd] Write Protect is off
[67826.901684] sd 7:0:1:0: [sdd] Mode Sense: 2f 00 00 00
Reported-by: Ben Jarvis <bjarvismn@xxxxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxx>
Signed-off-by: Nicholas A. Bellinger <nab@xxxxxxxxxxxxxxx>
Cc James Bottomley <James.Bottomley@xxxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/target/target_core_cdb.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff -puN drivers/target/target_core_cdb.c~target-fix-read_capacity_16-regression drivers/target/target_core_cdb.c
--- a/drivers/target/target_core_cdb.c~target-fix-read_capacity_16-regression
+++ a/drivers/target/target_core_cdb.c
@@ -667,7 +667,13 @@ target_emulate_readcapacity(struct se_cm
{
struct se_device *dev = SE_DEV(cmd);
unsigned char *buf = cmd->t_task->t_task_buf;
- u32 blocks = dev->transport->get_blocks(dev);
+ unsigned long long blocks_long = dev->transport->get_blocks(dev);
+ u32 blocks;
+
+ if (blocks_long >= 0x00000000ffffffff)
+ blocks = 0xffffffff;
+ else
+ blocks = (u32)blocks_long;
buf[0] = (blocks >> 24) & 0xff;
buf[1] = (blocks >> 16) & 0xff;
_
Patches currently in -mm which might be from nab@xxxxxxxxxxxxxxx are
linux-next.patch
--
To unsubscribe from this list: send the line "unsubscribe mm-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
