diff options
| author | haad <haad@NetBSD.org> | 2010-05-18 15:10:38 +0000 |
|---|---|---|
| committer | haad <haad@NetBSD.org> | 2010-05-18 15:10:38 +0000 |
| commit | fb8751aba4474091bdc25a5cce462d526a403d72 (patch) | |
| tree | ffedb891877783c792ef6cf3dfa4f8b7b2790683 /sys/dev/dm/dm_target_zero.c | |
| parent | 923bf0dda043333f52a68e794027abbb3f111b5a (diff) | |
Add support for DIOCCACHESYNC ioctl for dm devices. Add new sync function
pointer to dm_target_t because that is the only part of dm which know real
block device. disk_ioctl_switch parses whole device table and for every
entry it calls particular sync routine which propagates DIOCCACHESYNC
to real disk.
While I was here implement some KNF fixes and remove unneeded symbols from
dm.h.
Problem reported on port-xen@ by Hugo Silva.
Diffstat (limited to 'sys/dev/dm/dm_target_zero.c')
| -rw-r--r-- | sys/dev/dm/dm_target_zero.c | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/sys/dev/dm/dm_target_zero.c b/sys/dev/dm/dm_target_zero.c index 494988fb785..ddeea82a8a4 100644 --- a/sys/dev/dm/dm_target_zero.c +++ b/sys/dev/dm/dm_target_zero.c @@ -1,4 +1,4 @@ -/* $NetBSD: dm_target_zero.c,v 1.10 2010/01/04 00:12:22 haad Exp $ */ +/* $NetBSD: dm_target_zero.c,v 1.11 2010/05/18 15:10:38 haad Exp $ */ /* * Copyright (c) 2008 The NetBSD Foundation, Inc. @@ -40,6 +40,15 @@ #include "dm.h" +/* dm_target_zero.c */ +int dm_target_zero_init(dm_dev_t *, void**, char *); +char * dm_target_zero_status(void *); +int dm_target_zero_strategy(dm_table_entry_t *, struct buf *); +int dm_target_zero_sync(dm_table_entry_t *); +int dm_target_zero_destroy(dm_table_entry_t *); +int dm_target_zero_deps(dm_table_entry_t *, prop_array_t); +int dm_target_zero_upcall(dm_table_entry_t *, struct buf *); + #ifdef DM_TARGET_MODULE /* * Every target can be compiled directly to dm driver or as a @@ -75,6 +84,7 @@ dm_target_zero_modcmd(modcmd_t cmd, void *arg) dmt->init = &dm_target_zero_init; dmt->status = &dm_target_zero_status; dmt->strategy = &dm_target_zero_strategy; + dmt->sync = &dm_target_zero_sync; dmt->deps = &dm_target_zero_deps; dmt->destroy = &dm_target_zero_destroy; dmt->upcall = &dm_target_zero_upcall; @@ -139,6 +149,13 @@ dm_target_zero_strategy(dm_table_entry_t * table_en, struct buf * bp) return 0; } +/* Sync underlying disk caches. */ +int +dm_target_zero_sync(dm_table_entry_t * table_en) +{ + + return 0; +} /* Doesn't not need to do anything here. */ int dm_target_zero_destroy(dm_table_entry_t * table_en) |
