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Commit Graph

8 Commits

Author SHA1 Message Date
Peter Rajnoha
f0ab6c33a9 dev-type: dev_get_primary_dev default error code 0, not -1 2013-07-19 15:26:53 +02:00
Peter Rajnoha
c9e8e7c235 dev-type: dev_get_primary_dev: fix ret value if dev is a partition and we used sysfs 2013-06-23 12:39:35 +02:00
Peter Rajnoha
21f1062ef8 dev-type: add/fix references for dev_types in non-linux case 2013-06-17 15:17:15 +02:00
Peter Rajnoha
ebf0898d69 dev-type: refine dev_get_primary_dev return codes and add more comments 2013-06-12 14:33:28 +02:00
Peter Rajnoha
8bade9bfea cleanup: remove old and unused code to detect partition types
This part of the code has not been used for ages, if ever.
If needed anytime in future, we should use some library
instead - libblkid?
2013-06-12 13:14:49 +02:00
Peter Rajnoha
65d0089c64 dev-type: dev_get_primary_dev fn: use dev_types and provide better return codes
The dev_get_primary_dev fn now returns:

  0 if the dev is already a primary dev
  1 if the dev is a partition, primary dev is returned in "result" (output arg)
  -1 on error

This way, we can better differentiate between the error state
and the state in which the dev supplied is not a partition
in the caller (this was same return value before).

Also, if we already have information about the device type,
we can check its major number against the list of known device
types (cmd->dev_types) directly, so we don't need to go through
the sysfs - we only check the major:minor pair which is a bit
more straightforward and faster. If the dev_types does not have
any info about this device type, the code just fallbacks to
the original sysfs interface to get the partition info.
2013-06-12 12:14:11 +02:00
Peter Rajnoha
c6f48b7c1a refactor: make device type recognition code common for general use
Changes:

- move device type registration out of "type filter" (filter.c)
to a separate and new dev-type.[ch] for common use throughout the code

- the structure for keeping the major numbers detected for available
device types and available partitioning available is stored in
"dev_types" structure now

- move common partitioning detection code to dev-type.[ch] as well
together with other device-related functions bound to dev_types
(see dev-type.h for the interface)

The dev-type interface contains all common functions used to detect
subsystems/device types, signature/superblock recognition code,
type-specific device properties and other common device properties
(bound to dev_types), including partitioning support.

- add dev_types instance to cmd context as cmd->dev_types for common use

- use cmd->dev_types throughout as a central point for providing
information about device types
2013-06-12 12:08:56 +02:00
Peter Rajnoha
1778d34cef refactor: move lib/device/device.c -> lib/device/dev-type.c 2013-06-12 11:54:37 +02:00