user/sven/linux.git/include/linux/dax.h, branch v5.18.3Linux Kernel
https://git.stealer.net/cgit.cgi/user/sven/linux.git/atom?h=v5.18.32021-12-18T16:04:53Zdax: remove the copy_from_iter and copy_to_iter methods2021-12-18T16:04:53ZChristoph Hellwighch@lst.de2021-12-15T08:45:08Zurn:sha1:7ac5360cd4d02cc7e0eaf10867f599e041822f12
These methods indirect the actual DAX read/write path. In the end pmem
uses magic flush and mc safe variants and fuse and dcssblk use plain ones
while device mapper picks redirects to the underlying device.
Add set_dax_nocache() and set_dax_nomc() APIs to control which copy
routines are used to remove indirect call from the read/write fast path
as well as a lot of boilerplate code.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Vivek Goyal <vgoyal@redhat.com> [virtiofs]
Link: https://lore.kernel.org/r/20211215084508.435401-5-hch@lst.de
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
dax: remove the DAXDEV_F_SYNC flag2021-12-18T16:04:52ZChristoph Hellwighch@lst.de2021-12-15T08:45:07Zurn:sha1:30c6828a17a572aeb9e3a3bacce05fdcf1106541
Remove the DAXDEV_F_SYNC flag and thus the flags argument to alloc_dax and
just let the drivers call set_dax_synchronous directly.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Pankaj Gupta <pankaj.gupta@ionos.com>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Link: https://lore.kernel.org/r/20211215084508.435401-4-hch@lst.de
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
dax: simplify dax_synchronous and set_dax_synchronous2021-12-18T16:04:52ZChristoph Hellwighch@lst.de2021-12-15T08:45:06Zurn:sha1:fd1d00ec92002d8fe28ca981a72395eaa7ae3d11
Remove the pointless wrappers.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Pankaj Gupta <pankaj.gupta@ionos.com>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Link: https://lore.kernel.org/r/20211215084508.435401-3-hch@lst.de
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
dax: fix up some of the block device related ifdefs2021-12-04T16:58:54ZChristoph Hellwighch@lst.de2021-11-29T10:22:01Zurn:sha1:2ede892342b3c628991ff1b9060108a7edd92d94
The DAX device <-> block device association is only enabled if
CONFIG_BLOCK is enabled. Update dax.h to account for that and use
the right conditions for the fs_put_dax stub as well.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Link: https://lore.kernel.org/r/20211129102203.2243509-28-hch@lst.de
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
dax: return the partition offset from fs_dax_get_by_bdev2021-12-04T16:58:54ZChristoph Hellwighch@lst.de2021-11-29T10:21:59Zurn:sha1:cd913c76f489def1a388e3a5b10df94948ede3f5
Prepare for the removal of the block_device from the DAX I/O path by
returning the partition offset from fs_dax_get_by_bdev so that the file
systems have it at hand for use during I/O.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Link: https://lore.kernel.org/r/20211129102203.2243509-26-hch@lst.de
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
fsdax: decouple zeroing from the iomap buffered I/O code2021-12-04T16:58:53ZChristoph Hellwighch@lst.de2021-11-29T10:21:52Zurn:sha1:c6f40468657d16e4010ef84bf32a761feb3469ea
Unshare the DAX and iomap buffered I/O page zeroing code. This code
previously did a IS_DAX check deep inside the iomap code, which in
fact was the only DAX check in the code. Instead move these checks
into the callers. Most callers already have DAX special casing anyway
and XFS will need it for reflink support as well.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Link: https://lore.kernel.org/r/20211129102203.2243509-19-hch@lst.de
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
fsdax: simplify the pgoff calculation2021-12-04T16:58:52ZChristoph Hellwighch@lst.de2021-11-29T10:21:48Zurn:sha1:60696eb26a37ab0199f7833ddbc1b75138c36d16
Replace the two steps of dax_iomap_sector and bdev_dax_pgoff with a
single dax_iomap_pgoff helper that avoids lots of cumbersome sector
conversions.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Link: https://lore.kernel.org/r/20211129102203.2243509-15-hch@lst.de
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
dax: remove dax_capable2021-12-04T16:58:51ZChristoph Hellwighch@lst.de2021-11-29T10:21:42Zurn:sha1:7b0800d00dae8c897398abaf61e82db0d67d7afc
Just open code the block size and dax_dev == NULL checks in the callers.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Mike Snitzer <snitzer@redhat.com>
Reviewed-by: Gao Xiang <hsiangkao@linux.alibaba.com> [erofs]
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Link: https://lore.kernel.org/r/20211129102203.2243509-9-hch@lst.de
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
dax: simplify the dax_device <-> gendisk association2021-12-04T16:58:51ZChristoph Hellwighch@lst.de2021-11-29T10:21:38Zurn:sha1:fb08a1908cb119a4585611d91461ab6d27756b14
Replace the dax_host_hash with an xarray indexed by the pointer value
of the gendisk, and require explicitly calls from the block drivers that
want to associate their gendisk with a dax_device.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Mike Snitzer <snitzer@redhat.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Link: https://lore.kernel.org/r/20211129102203.2243509-5-hch@lst.de
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
nvdimm/pmem: move dax_attribute_group from dax to pmem2021-09-27T18:32:51ZChristoph Hellwighch@lst.de2021-09-22T17:34:30Zurn:sha1:e765f13ed126fe7e41d1a6e3c60d754cd6c2af93
dax_attribute_group is only used by the pmem driver, and can avoid the
completely pointless lookup by the disk name if moved there. This
leaves just a single caller of dax_get_by_host, so move dax_get_by_host
into the same ifdef block as that caller.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Link: https://lore.kernel.org/r/20210922173431.2454024-3-hch@lst.de
Signed-off-by: Dan Williams <dan.j.williams@intel.com>