kernel/linux.git/drivers/md, branch linux-2.6.22.y

dm snapshot: fix invalidation deadlock

2007-11-05T17:56:07+00:00

patch fcac03abd325e4f7a4cc8fe05fea2793b1c8eb75 in mainline Process persistent exception store metadata IOs in a separate thread. A snapshot may become invalid while inside generic_make_request(). A synchronous write is then needed to update the metadata while still inside that function. Since the introduction of md-dm-reduce-stack-usage-with-stacked-block-devices.patch this has to be performed by a separate thread to avoid deadlock. Signed-off-by: Milan Broz Signed-off-by: Alasdair G Kergon Signed-off-by: Linus Torvalds Cc: Chuck Ebbert Signed-off-by: Greg Kroah-Hartman

dm: disable barriers

2007-08-09T21:27:45+00:00

This patch causes device-mapper to reject any barrier requests. This is done since most of the targets won't handle this correctly anyway. So until the situation improves it is better to reject these requests at the first place. Since barrier requests won't get to the targets, the checks there can be removed. Signed-off-by: Stefan Bader Signed-off-by: Alasdair G Kergon Signed-off-by: Greg Kroah-Hartman

dm snapshot: permit invalid activation

2007-08-09T21:27:44+00:00

Allow invalid snapshots to be activated instead of failing. This allows userspace to reinstate any given snapshot state - for example after an unscheduled reboot - and clean up the invalid snapshot at its leisure. Signed-off-by: Milan Broz Signed-off-by: Alasdair G Kergon Signed-off-by: Greg Kroah-Hartman

dm io: fix another panic on large request

2007-08-09T21:27:42+00:00

bio_alloc_bioset() will return NULL if 'num_vecs' is too large. Use bio_get_nr_vecs() to get estimation of maximum number. Signed-off-by: Junichi Nomura Signed-off-by: Alasdair G Kergon Signed-off-by: Greg Kroah-Hartman

dm raid1: fix status

2007-08-09T21:27:42+00:00

Fix mirror status line broken in dm-log-report-fault-status.patch: - space missing between two words - placeholder ("0") required for compatibility with a subsequent patch - incorrect offset parameter Signed-off-by: Milan Broz Signed-off-by: Alasdair G Kergon Signed-off-by: Greg Kroah-Hartman

dm io: fix panic on large request

2007-08-09T21:27:37+00:00

Flush workqueue before releasing bioset and mopools in dm-crypt. There can be finished but not yet released request. Call chain causing oops: run workqueue dec_pending bio_endio(...); mempool_free(io, cc->io_pool); This usually happens when cryptsetup create temporary luks mapping in the beggining of crypt device activation. When dm-core calls destructor crypt_dtr, no new request are possible. Signed-off-by: Milan Broz Cc: Chuck Ebbert Cc: Patrick McHardy Acked-by: Alasdair G Kergon Cc: Christophe Saout Signed-off-by: Andrew Morton Signed-off-by: Greg Kroah-Hartman

md: raid10: fix use-after-free of bio

2007-08-09T21:27:36+00:00

In case of read errors raid10d tries to print a nice error message, unfortunately using data from an already put bio. Signed-off-by: Maik Hampel Acked-By: NeilBrown Signed-off-by: Andrew Morton Signed-off-by: Greg Kroah-Hartman

md: handle writes to broken raid10 arrays gracefully

2007-08-09T21:27:36+00:00

When writing to a broken array, raid10 currently happily emits empty bio lists. IOW, the master bio will never be completed, sending writers to UNINTERRUPTIBLE_SLEEP forever. Signed-off-by: Arne Redlich Acked-by: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: Greg Kroah-Hartman

md: fix bug in error handling during raid1 repair

2007-06-16T20:16:15+00:00

If raid1/repair (which reads all block and fixes any differences it finds) hits a read error, it doesn't reset the bio for writing before writing correct data back, so the read error isn't fixed, and the device probably gets a zero-length write which it might complain about. Signed-off-by: Neil Brown Cc: Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

md: fix two raid10 bugs

2007-06-16T20:16:15+00:00

1/ When resyncing a degraded raid10 which has more than 2 copies of each block, garbage can get synced on top of good data. 2/ We round the wrong way in part of the device size calculation, which can cause confusion. Signed-off-by: Neil Brown Cc: Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds