linux.git/fs/nfs/blocklayout/dev.c, branch v6.9

nfs: port block device access to files

2024-02-25T11:05:26+00:00

Link: https://lore.kernel.org/r/20240123-vfs-bdev-file-v2-24-adbd023e19cc@kernel.org
Reviewed-by: Jan Kara 
Signed-off-by: Christian Brauner

pnfs/blocklayout: Don't add zero-length pnfs_block_dev

2024-01-04T15:47:56+00:00

We noticed a SCSI device that refused to allow READ CAPACITY when the
device had a PR with exclusive access, registrants only.  The result of
this situation is that the blocklayout driver adds a pnfs_block_dev of zero
length which always fails the offset_in_map tests.  Instead of continuously
trying to do pNFS for this case, just mark the device as unavailable which
will allow the client to fallback to the MDS for the duration of
PNFS_DEVICE_RETRY_TIMEOUT.

Signed-off-by: Benjamin Coddington 
Signed-off-by: Anna Schumaker

nfs/blocklayout: Convert to use bdev_open_by_dev/path()

2023-10-28T11:29:21+00:00

Convert block device handling to use bdev_open_by_dev/path() and pass
the handle around.

CC: linux-nfs@vger.kernel.org
CC: Trond Myklebust 
CC: Anna Schumaker 
Acked-by: Christoph Hellwig 
Reviewed-by: Christian Brauner 
Signed-off-by: Jan Kara 
Link: https://lore.kernel.org/r/20230927093442.25915-25-jack@suse.cz
Signed-off-by: Christian Brauner

nfs/blocklayout: Use the passed in gfp flags

2023-08-24T17:24:15+00:00

This allocation should use the passed in GFP_ flags instead of
GFP_KERNEL.  One places where this matters is in filelayout_pg_init_write()
which uses GFP_NOFS as the allocation flags.

Fixes: 5c83746a0cf2 ("pnfs/blocklayout: in-kernel GETDEVICEINFO XDR parsing")
Signed-off-by: Dan Carpenter 
Reviewed-by: Christoph Hellwig 
Signed-off-by: Anna Schumaker

block: replace fmode_t with a block-specific type for block open flags

2023-06-12T14:04:05+00:00

The only overlap between the block open flags mapped into the fmode_t and
other uses of fmode_t are FMODE_READ and FMODE_WRITE.  Define a new
blk_mode_t instead for use in blkdev_get_by_{dev,path}, ->open and
->ioctl and stop abusing fmode_t.

Signed-off-by: Christoph Hellwig 
Acked-by: Jack Wang 		[rnbd]
Reviewed-by: Hannes Reinecke 
Reviewed-by: Christian Brauner 
Link: https://lore.kernel.org/r/20230608110258.189493-28-hch@lst.de
Signed-off-by: Jens Axboe

block: use the holder as indication for exclusive opens

2023-06-12T14:04:04+00:00

The current interface for exclusive opens is rather confusing as it
requires both the FMODE_EXCL flag and a holder.  Remove the need to pass
FMODE_EXCL and just key off the exclusive open off a non-NULL holder.

For blkdev_put this requires adding the holder argument, which provides
better debug checking that only the holder actually releases the hold,
but at the same time allows removing the now superfluous mode argument.

Signed-off-by: Christoph Hellwig 
Reviewed-by: Hannes Reinecke 
Acked-by: Christian Brauner 
Acked-by: David Sterba 		[btrfs]
Acked-by: Jack Wang 		[rnbd]
Link: https://lore.kernel.org/r/20230608110258.189493-16-hch@lst.de
Signed-off-by: Jens Axboe

block: introduce holder ops

2023-06-05T16:53:04+00:00

Add a new blk_holder_ops structure, which is passed to blkdev_get_by_* and
installed in the block_device for exclusive claims.  It will be used to
allow the block layer to call back into the user of the block device for
thing like notification of a removed device or a device resize.

Signed-off-by: Christoph Hellwig 
Reviewed-by: Jan Kara 
Acked-by: Dave Chinner 
Reviewed-by: Dave Chinner 
Link: https://lore.kernel.org/r/20230601094459.1350643-10-hch@lst.de
Signed-off-by: Jens Axboe

nfs/blocklayout: refactor block device opening

2022-07-12T14:05:21+00:00

Deduplicate the helpers to open a device node by passing a name
prefix argument and using the same helper for both kinds of paths.

Signed-off-by: Christoph Hellwig 
Signed-off-by: Trond Myklebust

nfs/blocklayout: use bdev_nr_bytes instead of open coding it

2021-10-18T20:43:23+00:00

Use the proper helper to read the block device size.

Signed-off-by: Christoph Hellwig 
Reviewed-by: Kees Cook 
Link: https://lore.kernel.org/r/20211018101130.1838532-19-hch@lst.de
Signed-off-by: Jens Axboe

SUNRPC: Add xdr_set_scratch_page() and xdr_reset_scratch_buffer()

2020-11-30T19:46:35+00:00

Clean up: De-duplicate some frequently-used code.

Signed-off-by: Chuck Lever