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| author | Mikulas Patocka <mpatocka@redhat.com> | 2013-03-01 23:45:49 +0100 |
|---|---|---|
| committer | Alasdair G Kergon <agk@redhat.com> | 2013-03-01 23:45:49 +0100 |
| commit | a26062416ef8add48f16fbadded2b5f6fb84d024 (patch) | |
| tree | 4f960c51bd22d99e55a1f56cf28f86f018de01a3 /Documentation/rtc.txt | |
| parent | dm ioctl: optimize functions without variable params (diff) | |
| download | linux-a26062416ef8add48f16fbadded2b5f6fb84d024.tar.xz linux-a26062416ef8add48f16fbadded2b5f6fb84d024.zip | |
dm ioctl: allow message to return data
This patch introduces enhanced message support that allows the
device-mapper core to recognise messages that are common to all devices,
and for messages to return data to userspace.
Core messages are processed by the function "message_for_md". If the
device mapper doesn't support the message, it is passed to the target
driver.
If the message returns data, the kernel sets the flag
DM_MESSAGE_OUT_FLAG.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Diffstat (limited to 'Documentation/rtc.txt')
0 files changed, 0 insertions, 0 deletions