On 1/12/23 12:58, Nitesh Shetty wrote:
For the devices which does not support copy, copy emulation is
added. Copy-emulation is implemented by reading from source ranges
into memory and writing to the corresponding destination asynchronously.
For zoned device we maintain a linked list of read subm
On 1/12/23 15:46, Hannes Reinecke wrote:
On 1/12/23 12:58, Nitesh Shetty wrote:
For the devices which does not support copy, copy emulation is
added. Copy-emulation is implemented by reading from source ranges
into memory and writing to the corresponding destination asynchronously.
For zoned dev
For the devices which does not support copy, copy emulation is
added. Copy-emulation is implemented by reading from source ranges
into memory and writing to the corresponding destination asynchronously.
For zoned device we maintain a linked list of read submission and try to
submit corresponding wr
Add support for handling target command on target.
For bdev-ns we call into blkdev_issue_copy, which the block layer
completes by a offloaded copy request to backend bdev or by emulating the
request.
For file-ns we call vfs_copy_file_range to service our request.
Currently target always shows cop
For device supporting native copy, nvme driver receives read and
write request with BLK_COPY op flags.
For read request the nvme driver populates the payload with source
information.
For write request the driver converts it to nvme copy command using the
source information in the payload and submit
Introduce copy_jobs to use copy-offload, if supported by underlying devices
otherwise fall back to existing method.
run_copy_jobs() calls block layer copy offload API, if both source and
destination request queue are same and support copy offload.
On successful completion, destination regions copi
The patch series covers the points discussed in November 2021 virtual
call [LSF/MM/BFP TOPIC] Storage: Copy Offload [0].
We have covered the initial agreed requirements in this patchset and
further additional features suggested by community.
Patchset borrows Mikulas's token based approach for 2 bde
Add device limits as sysfs entries,
- copy_offload (RW)
- copy_max_bytes (RW)
- copy_max_bytes_hw (RO)
Above limits help to split the copy payload in block layer.
copy_offload: used for setting copy offload(1) or emulation(0).
copy_max_bytes: maximum total length of copy in
Add new BLKCOPY ioctl that offloads copying of one or more sources ranges
to one or more destination in a device. COPY ioctl accepts a 'copy_range'
structure that contains no of range, a reserved field , followed by an
array of ranges. Each source range is represented by 'range_entry' that
contains
Before enabling copy for dm target, check if underlying devices and
dm target support copy. Avoid split happening inside dm target.
Fail early if the request needs split, currently splitting copy
request is not supported.
Signed-off-by: Nitesh Shetty
---
drivers/md/dm-table.c | 42 ++
Introduce blkdev_issue_copy which supports source and destination bdevs,
and an array of (source, destination and copy length) tuples.
Introduce REQ_COPY copy offload operation flag. Create a read-write
bio pair with a token as payload and submitted to the device in order.
Read request populates to
On 1/12/23 12:58, Nitesh Shetty wrote:
Introduce blkdev_issue_copy which supports source and destination bdevs,
and an array of (source, destination and copy length) tuples.
Introduce REQ_COPY copy offload operation flag. Create a read-write
bio pair with a token as payload and submitted to the d
On Thu, Dec 22, 2022 at 03:27:21PM +0100, mwi...@suse.com wrote:
> From: Martin Wilck
>
> To check whether we will be able to add a given device can be part
> of a multipath map, we have two tests in check_path_valid():
> released_to_systemd() and the O_EXCL test. The former isn't helpful
> if "m
From: Nitin Yewale
The multipathd command "multipathd show wildcards" shows the pathgroup
format wildcards, but there is no way to use them in a multipathd
command.
Signed-off-by: Benjamin Marzinski
---
libmultipath/print.c | 7 ---
1 file changed, 7 deletions(-)
diff --git a/libmultipath
From: Nitin Yewale
Move "multipathd show wildcards" command above the $format commands and
also add $format options for "map" and "path" commands to the multipathd
man page.
Signed-off-by: Benjamin Marzinski
---
multipathd/multipathd.8 | 16
1 file changed, 12 insertions(+), 4
These are two small cleanup patches for the multipathd format wildcards
that I've been given.
Nitin Yewale (2):
multipathd: Add format options to multipathd man page
libmultipath: remove pathgroup wildcard options
libmultipath/print.c| 7 ---
multipathd/multipathd.8 | 16 +++
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