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ibmvstgt patch description: Separated porting changes from other changes.

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git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@2667 d57e44dd-8a1f-0410-8b47-8ef2f437770f
This commit is contained in:
Bart Van Assche
2010-11-11 13:23:30 +00:00
parent b3364e18ba
commit 64b2df03e4
1 changed files with 23 additions and 19 deletions
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42
scripts/generate-kernel-patch
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@@ -570,23 +570,9 @@ because this patch dissociates ibmvstgt SRP sessions from a SCSI host
instance. Since the user space STGT driver ibmvio was the only user of
these attributes, that shouldn't be an issue.
Functional changes in ibmvstgt compared to the patch posted on October 2, 2010:
Changes in ibmvstgt compared to the patch posted on October 2, 2010:
- The format of a SCSI INQUIRY response is now in the format expected by AIX.
- Added support for persistent reservations.
- Increased maximum data size for a single SRP command from 128 KB to 64 MB.
- The maximum RDMA transfer size supported by a single H_COPY_RDMA call is
queried at driver initiatlization time from the open firmware tree / larger
transfers than 128 KB are now supported too.
- If DMA mapping fails while handling a READ or WRITE command, the offending
command is retried until the associated data has been transferred instead of
reporting to the ibmvscsi client that the SCSI command failed.
- Aborting a SCSI command does no longer trigger an SRP credit leak.
- VSCSI command/response queue: one element has been reserved for management
datagrams since these fall outside the SRP credit mechanism. Added a compile-
time check whether the size of this queue is a power of two.
- Fixed a race condition which in theory could have caused the VSCSI receive
queue to overflow: srp_iu_put() is now invoked before a response is sent back
to the initiator instead of after.
- The flag SRP_RSP_FLAG_SNSVALID in an SRP_RSP information unit is now only
set when a response contains sense data and not when e.g. the response status
is BUSY and no sense data is sent back to the initiator.
@@ -596,13 +582,34 @@ Functional changes in ibmvstgt compared to the patch posted on October 2, 2010:
invoked before a client has logged in.
- The second and subsequent SRP_LOGIN received from a client does no longer
trigger a BUG_ON() in process_login().
Changes in ibmvstgt compared to kernel 2.6.36:
- Added support for persistent reservations.
- Increased maximum data size for a single SRP command from 128 KB to 64 MB.
- The maximum RDMA transfer size supported by a single H_COPY_RDMA call is
queried at driver initiatlization time from the open firmware tree / larger
transfers than 128 KB are now supported too.
- If DMA mapping fails while handling a READ or WRITE command, the offending
command is retried until the associated data has been transferred instead of
reporting to the ibmvscsi client that the SCSI command failed.
- VSCSI command/response queue: one element has been reserved for management
datagrams since these fall outside the SRP credit mechanism. Added a compile-
time check whether the size of this queue is a power of two.
- Fixed a race condition which in theory could have caused the VSCSI receive
queue to overflow: srp_iu_put() is now invoked before a response is sent back
to the initiator instead of after.
- Moved enum iue_flags from libsrp to ibmvstgt because it is ibmvstgt-specific.
- Removed a variable that was modified but never read from ibmvstgt_rdma().
- ibmvstgt_probe(): changed the datatype of the variable "dma" from
unsigned * into const unsigned * such that a cast could be removed.
- Fixed all compiler and sparse warnings (C=2 CF=-D__CHECK_ENDIAN__).
Functional changes in libsrp compared to the patch posted on October 2, 2010:
Changes in libsrp compared to the patch posted on October 2, 2010:
- srp_direct_data() and srp_indirect_data(): Use the data length from
the SCSI CDB instead of the length from the SRP_CMD data descriptors. Also,
compute the correct data length even if dma_map == 0.
Changes in libsrp compared to kernel 2.6.36:
- Renamed vscsis_data_length() into srp_data_length() and exported
this function.
- All error messages reported via printk() do now have prefix KERN_ERR.
@@ -613,9 +620,6 @@ Functional changes in libsrp compared to the patch posted on October 2, 2010:
- srp_transfer_data(): All three return statements related to DMA mapping
failure do now return -ENOMEM instead of 0, -EIO and -ENOMEM.
- srp_direct_data(): Removed the ext_desc argument since not used.
- srp_direct_data() and srp_indirect_data(): Use the data length from
the SCSI CDB instead of the length from the SRP_CMD data descriptors. Also,
compute the correct data length even if dma_map == 0.
- srp_direct_data() and srp_indirect_data(): Use DMA_TO/FROM_DEVICE
instead of DMA_BIDIRECTIONAL for the buffers mapped for transferring data
via DMA.