linux.git/drivers/md/dm-snap.c, branch v2.6.19

[PATCH] dm snapshot: fix freeing pending exception

2006-10-03T15:04:15+00:00

If a snapshot became invalid while there are outstanding pending_exceptions,
when pending_complete() processes each one it forgets to remove the
corresponding exception from its exception table before freeing it.

Fix this by moving the 'out:' label up one statement so that
remove_exception() is always called.  Then __invalidate_exception() no longer
needs to call it and its 'pe' argument become superfluous.

Signed-off-by: Alasdair G Kergon 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] dm snapshot: tidy pe ref counting

2006-10-03T15:04:14+00:00

Rename sibling_count to ref_count and introduce get and put functions.

Signed-off-by: Alasdair G Kergon 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] dm snapshot: add workqueue

2006-10-03T15:04:14+00:00

Add a workqueue so that I/O can be queued up to be flushed from a separate
thread (e.g.  if local interrupts are disabled).

A new per-snapshot spinlock pe_lock is introduced to protect queued_bios.

Signed-off-by: Alasdair G Kergon 
Signed-off-by: Mark McLoughlin 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] dm snapshot: tidy pending_complete

2006-10-03T15:04:14+00:00

This patch rearranges the pending_complete() code so that the functional
changes in subsequent patches are clearer.

By consolidating the error and the non-error paths, we can move
error_snapshot_bios() and __flush_bios() in line.

Signed-off-by: Alasdair G Kergon 
Signed-off-by: Mark McLoughlin 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] dm snapshot: tidy snapshot_map

2006-10-03T15:04:14+00:00

This patch rearranges the snapshot_map code so that the functional changes in
subsequent patches are clearer.

The only functional change is to replace the existing read lock with a write
lock which the next patch needs.

Signed-off-by: Alasdair G Kergon 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] dm snapshot: fix metadata error handling

2006-10-03T15:04:14+00:00

Fix the error handling when store.read_metadata is called: the error should be
returned immediately.

Signed-off-by: Mark McLoughlin 
Signed-off-by: Alasdair G Kergon 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] dm snapshot: allow zero chunk_size

2006-10-03T15:04:14+00:00

The chunk size of snapshots cannot be changed so it is redundant to require it
as a parameter when activating an existing snapshot.  Allow a value of zero in
this case and ignore it.  For a new snapshot, use a default value if zero is
specified.

Signed-off-by: Mark McLoughlin 
Signed-off-by: Alasdair G Kergon 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] dm snapshot: fix invalidation ENOMEM

2006-10-03T15:04:14+00:00

Fix ENOMEM error sign.

Signed-off-by: Milan Broz 
Signed-off-by: Alasdair G Kergon 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Remove obsolete #include

2006-06-30T17:25:36+00:00

Signed-off-by: Jörn Engel 
Signed-off-by: Adrian Bunk

[PATCH] dm: improve error message consistency

2006-06-26T16:58:36+00:00

Tidy device-mapper error messages to include context information
automatically.

Signed-off-by: Alasdair G Kergon 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds