linux/drivers/block/Makefile, branch v2.6.26

The ps2esdi driver was marked as BROKEN more than two years ago due to being

2008-03-17T08:03:05Z

no longer working for some time. A driver that had been marked as BROKEN for such a long time seems to be unlikely to be revived in the forseeable future. But if anyone wants to ever revive this driver, the code is still present in the older kernel releases. Signed-off-by: Adrian Bunk Acked-by: Alan Cox Cc: Jens Axboe Signed-off-by: Andrew Morton Signed-off-by: Jens Axboe

rewrite rd

2008-02-08T17:22:30Z

This is a rewrite of the ramdisk block device driver. The old one is really difficult because it effectively implements a block device which serves data out of its own buffer cache. It relies on the dirty bit being set, to pin its backing store in cache, however there are non trivial paths which can clear the dirty bit (eg. try_to_free_buffers()), which had recently lead to data corruption. And in general it is completely wrong for a block device driver to do this. The new one is more like a regular block device driver. It has no idea about vm/vfs stuff. It's backing store is similar to the buffer cache (a simple radix-tree of pages), but it doesn't know anything about page cache (the pages in the radix tree are not pagecache pages). There is one slight downside -- direct block device access and filesystem metadata access goes through an extra copy and gets stored in RAM twice. However, this downside is only slight, because the real buffercache of the device is now reclaimable (because we're not playing crazy games with it), so under memory intensive situations, footprint should effectively be the same -- maybe even a slight advantage to the new driver because it can also reclaim buffer heads. The fact that it now goes through all the regular vm/fs paths makes it much more useful for testing, too. text data bss dec hex filename 2837 849 384 4070 fe6 drivers/block/rd.o 3528 371 12 3911 f47 drivers/block/brd.o Text is larger, but data and bss are smaller, making total size smaller. A few other nice things about it: - Similar structure and layout to the new loop device handlinag. - Dynamic ramdisk creation. - Runtime flexible buffer head size (because it is no longer part of the ramdisk code). - Boot / load time flexible ramdisk size, which could easily be extended to a per-ramdisk runtime changeable size (eg. with an ioctl). - Can use highmem for the backing store. [akpm@linux-foundation.org: fix build] [byron.bbradley@gmail.com: make rd_size non-static] Signed-off-by: Nick Piggin Signed-off-by: Byron Bradley Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

Remove old lguest bus and drivers.

2007-10-23T05:49:55Z

This gets rid of the lguest bus, drivers and DMA mechanism, to make way for a generic virtio mechanism. Signed-off-by: Rusty Russell

Block driver using virtio.

2007-10-23T05:49:54Z

The block driver uses scatter-gather lists with sg[0] being the request information (struct virtio_blk_outhdr) with the type, sector and inbuf id. The next N sg entries are the bio itself, then the last sg is the status byte. Whether the N entries are in or out depends on whether it's a read or a write. We accept the normal (SCSI) ioctls: they get handed through to the other side which can then handle it or reply that it's unsupported. It's not clear that this actually works in general, since I don't know if blk_pc_request() requests have an accurate rq_data_dir(). Although we try to reply -ENOTTY on unsupported commands, ioctl(fd, CDROMEJECT) returns success to userspace. This needs a separate patch. Signed-off-by: Rusty Russell Cc: Jens Axboe

Make lguest compile with CONFIG_BLOCK=n and CONFIG_NET=n

2007-07-30T00:37:45Z

Gabriel C reports lguest doesn't compile with CONFIG_BLOCK=n. Fix this by introducing a config var for the block device, which depends on LGUEST && BLOCK. Do the same for the net driver, rather then depending gratuitously on CONFIG_NET. Signed-off-by: Rusty Russell Cc: Gabriel C Signed-off-by: Linus Torvalds

ps3: Disk Storage Driver

2007-07-22T00:49:16Z

Add a Disk Storage Driver for the PS3: - Implemented as a block device driver with a dynamic major - Disk names (and partitions) are of the format ps3d%c(%u) - Uses software scatter-gather with a 64 KiB bounce buffer as the hypervisor doesn't support scatter-gather Cc: Geoff Levand Signed-off-by: Geert Uytterhoeven Acked-by: Jens Axboe Cc: James Bottomley Cc: Paul Mackerras Cc: Benjamin Herrenschmidt Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

lguest: the block driver

2007-07-19T17:04:53Z

Lguest block driver A simple block driver for lguest. Signed-off-by: Rusty Russell Cc: Andi Kleen Cc: Jens Axboe Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

xen: add virtual block device driver.

2007-07-18T15:47:45Z

The block device frontend driver allows the kernel to access block devices exported exported by a virtual machine containing a physical block device driver. Signed-off-by: Ian Pratt Signed-off-by: Christian Limpach Signed-off-by: Chris Wright Cc: Arjan van de Ven Cc: Greg KH Cc: Jens Axboe

Add support for Xilinx SystemACE CompactFlash interface

2007-07-17T17:23:02Z

Tested on Xilinx Virtex ppc405, Katmai 440SPe, and Microblaze Signed-off-by: Grant Likely Acked-by: Stefan Roese Cc: Jens Axboe Cc: John William Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

Merge branch 'for-linus' of git://git.kernel.dk/data/git/linux-2.6-block

2007-07-16T17:48:20Z

* 'for-linus' of git://git.kernel.dk/data/git/linux-2.6-block: splice: direct splicing updates ppos twice more ACSI removal umem: Fix match of pci_ids in umem driver umem: Remove references to dead CONFIG_MM_MAP_MEMORY variable remove the documentation for the legacy CDROM drivers