linux/drivers/md/raid1.h, branch v3.4.58

md/raid1: Allocate spare to store replacement devices and their bios.

2011-12-22T23:17:56Z

In RAID1, a replacement is much like a normal device, so we just double the size of the relevant arrays and look at all possible devices for reads and writes. This means that the array looks like it is now double the size in some way - we need to be careful about that. In particular, we checking if the array is still degraded while creating a recovery request we need to only consider the first 'half' - i.e. the real (non-replacement) devices. Signed-off-by: NeilBrown

md: add proper write-congestion reporting to RAID1 and RAID10.

2011-10-11T05:50:01Z

RAID1 and RAID10 handle write requests by queuing them for handling by a separate thread. This is because when a write-intent-bitmap is active we might need to update the bitmap first, so it is good to queue a lot of writes, then do one big bitmap update for them all. However writeback request devices to appear to be congested after a while so it can make some guesstimate of throughput. The infinite queue defeats that (note that RAID5 has already has a finite queue so it doesn't suffer from this problem). So impose a limit on the number of pending write requests. By default it is 1024 which seems to be generally suitable. Make it configurable via module option just in case someone finds a regression. Signed-off-by: NeilBrown

md/raid1: typedef removal: conf_t -> struct r1conf

2011-10-11T05:49:05Z

Signed-off-by: NeilBrown

md: remove typedefs: mirror_info_t -> struct mirror_info

2011-10-11T05:48:46Z

Signed-off-by: NeilBrown

md: remove typedefs: r10bio_t -> struct r10bio and r1bio_t -> struct r1bio

2011-10-11T05:48:43Z

Signed-off-by: NeilBrown

md: remove typedefs: mdk_thread_t -> struct md_thread

2011-10-11T05:48:23Z

Signed-off-by: NeilBrown

md: remove typedefs: mddev_t -> struct mddev

2011-10-11T05:47:53Z

Having mddev_t and 'struct mddev_s' is ugly and not preferred Signed-off-by: NeilBrown

md: removing typedefs: mdk_rdev_t -> struct md_rdev

2011-10-11T05:45:26Z

The typedefs are just annoying. 'mdk' probably refers to 'md_k.h' which used to be an include file that defined this thing. Signed-off-by: NeilBrown

md/raid1: add documentation to r1_private_data_s data structure.

2011-10-07T03:22:33Z

There wasn't much and it is inconsistent. Also rearrange fields to keep related fields together. Reported-by: Aapo Laine Signed-off-by: NeilBrown

md/raid1: Handle write errors by updating badblock log.

2011-07-28T01:32:41Z

When we get a write error (in the data area, not in metadata), update the badblock log rather than failing the whole device. As the write may well be many blocks, we trying writing each block individually and only log the ones which fail. Signed-off-by: NeilBrown Reviewed-by: Namhyung Kim