Joe Thornber 2dd9c257fb dm thin: support read only external snapshot origins ... Support the use of an external _read only_ device as an origin for a thin device. Any read to an unprovisioned area of the thin device will be passed through to the origin. Writes trigger allocation of new blocks as usual. One possible use case for this would be VM hosts that want to run guests on thinly-provisioned volumes but have the base image on another device (possibly shared between many VMs). Signed-off-by: Joe Thornber <ejt@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>		2012-03-28 18:41:28 +01:00
..
persistent-data	dm persistent data: remove space map ref_count entries if redundant	2012-03-28 18:41:27 +01:00
bitmap.c	md updates for 3.4	2012-03-22 12:29:50 -07:00
bitmap.h	md/bitmap: discard CHUNK_BLOCK_SHIFT macro	2012-03-19 12:46:41 +11:00
dm-bio-record.h	dm: preserve bi_io_vec when resubmitting bios	2009-04-02 19:55:23 +01:00
dm-bufio.c	dm-bufio.c: there's no need to include linux/version.h	2012-02-03 22:38:12 +01:00
dm-bufio.h	dm: add bufio	2011-10-31 20:19:09 +00:00
dm-crypt.c	dm: reject trailing characters in sccanf input	2012-03-28 18:41:26 +01:00
dm-delay.c	dm: reject trailing characters in sccanf input	2012-03-28 18:41:26 +01:00
dm-exception-store.c	dm exception store: fix init error path	2012-03-28 18:41:22 +01:00
dm-exception-store.h	dm snapshot: test chunk size against both origin and snapshot	2010-08-12 04:13:51 +01:00
dm-flakey.c	dm: reject trailing characters in sccanf input	2012-03-28 18:41:26 +01:00
dm-io.c	dm io: fix discard support	2012-03-07 19:09:37 +00:00
dm-ioctl.c	dm: reject trailing characters in sccanf input	2012-03-28 18:41:26 +01:00
dm-kcopyd.c	dm kcopyd: add dm_kcopyd_zero to zero an area	2011-10-31 20:18:58 +00:00
dm-linear.c	dm: reject trailing characters in sccanf input	2012-03-28 18:41:26 +01:00
dm-log-userspace-base.c	Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux	2011-11-06 19:44:47 -08:00
dm-log-userspace-transfer.c	netlink: kill eff_cap from struct netlink_skb_parms	2011-03-03 13:32:07 -08:00
dm-log-userspace-transfer.h	dm log: userspace add luid to distinguish between concurrent log instances	2009-09-04 20:40:34 +01:00
dm-log.c	dm: reject trailing characters in sccanf input	2012-03-28 18:41:26 +01:00
dm-mpath.c	dm: reject trailing characters in sccanf input	2012-03-28 18:41:26 +01:00
dm-mpath.h	dm mpath: remove is_active from struct dm_path	2008-10-10 13:36:58 +01:00
dm-path-selector.c	md: Add module.h to all files using it implicitly	2011-10-31 19:31:18 -04:00
dm-path-selector.h	dm mpath: add start_io and nr_bytes to path selectors	2009-06-22 10:12:27 +01:00
dm-queue-length.c	dm: reject trailing characters in sccanf input	2012-03-28 18:41:26 +01:00
dm-raid1.c	dm: reject trailing characters in sccanf input	2012-03-28 18:41:26 +01:00
dm-raid.c	dm raid: handle failed devices during start up	2012-03-28 18:41:26 +01:00
dm-region-hash.c	Fix common misspellings	2011-03-31 11:26:23 -03:00
dm-round-robin.c	dm: reject trailing characters in sccanf input	2012-03-28 18:41:26 +01:00
dm-service-time.c	dm: reject trailing characters in sccanf input	2012-03-28 18:41:26 +01:00
dm-snap-persistent.c	md: Add in export.h for files using EXPORT_SYMBOL	2011-10-31 19:31:19 -04:00
dm-snap-transient.c	md: Add in export.h for files using EXPORT_SYMBOL	2011-10-31 19:31:19 -04:00
dm-snap.c	dm snapshot: skip reading origin when overwriting complete chunk	2011-08-02 12:32:04 +01:00
dm-stripe.c	dm: reject trailing characters in sccanf input	2012-03-28 18:41:26 +01:00
dm-sysfs.c	Driver core: Constify struct sysfs_ops in struct kobj_type	2010-03-07 17:04:49 -08:00
dm-table.c	dm: reject trailing characters in sccanf input	2012-03-28 18:41:26 +01:00
dm-target.c	dm: error return error for discards	2010-08-12 04:14:14 +01:00
dm-thin-metadata.c	dm thin: relax hard limit on the maximum size of a metadata device	2012-03-28 18:41:28 +01:00
dm-thin-metadata.h	dm thin: relax hard limit on the maximum size of a metadata device	2012-03-28 18:41:28 +01:00
dm-thin.c	dm thin: support read only external snapshot origins	2012-03-28 18:41:28 +01:00
dm-uevent.c	md: Add in export.h for files using EXPORT_SYMBOL	2011-10-31 19:31:19 -04:00
dm-uevent.h	dm: uevent generate events	2007-10-20 02:01:26 +01:00
dm-zero.c	dm: zero silently drop discards	2010-08-12 04:14:12 +01:00
dm.c	dm: clear bi_end_io on remapping failure	2012-03-28 18:41:25 +01:00
dm.h	dm table: add immutable feature	2011-10-31 20:19:04 +00:00
faulty.c	md: tidy up rdev_for_each usage.	2012-03-19 12:46:39 +11:00
Kconfig	dm raid: no longer experimental	2012-03-28 18:41:24 +01:00
linear.c	md: add proper merge_bvec handling to RAID0 and Linear.	2012-03-19 12:46:39 +11:00
linear.h	md/linear: typedef removal: linear_conf_t -> struct linear_conf	2011-10-11 16:48:54 +11:00
Makefile	dm: add thin provisioning target	2011-10-31 20:21:18 +00:00
md.c	md: Add judgement bb->unacked_exist in function md_ack_all_badblocks().	2012-03-19 12:46:42 +11:00
md.h	md/raid10: handle merge_bvec_fn in member devices.	2012-03-19 12:46:39 +11:00
multipath.c	md: tidy up rdev_for_each usage.	2012-03-19 12:46:39 +11:00
multipath.h	md/multipath: typedef removal: multipath_conf_t -> struct mpconf	2011-10-11 16:48:57 +11:00
raid0.c	md: add proper merge_bvec handling to RAID0 and Linear.	2012-03-19 12:46:39 +11:00
raid0.h	md: add proper merge_bvec handling to RAID0 and Linear.	2012-03-19 12:46:39 +11:00
raid1.c	md/raid1: handle merge_bvec_fn in member devices.	2012-03-19 12:46:39 +11:00
raid1.h	md/raid1: Allocate spare to store replacement devices and their bios.	2011-12-23 10:17:56 +11:00
raid5.c	md: tidy up rdev_for_each usage.	2012-03-19 12:46:39 +11:00
raid5.h	md/raid5: detect and handle replacements during recovery.	2011-12-23 10:17:53 +11:00
raid10.c	md/raid10 - support resizing some RAID10 arrays.	2012-03-19 12:46:40 +11:00
raid10.h	md/raid10: prepare data structures for handling replacement.	2011-12-23 10:17:54 +11:00