From 81fdb096dbcedcc3b94c7e47b59362b5214891e2 Mon Sep 17 00:00:00 2001 From: Kiyoshi Ueda Date: Fri, 8 Dec 2006 02:41:07 -0800 Subject: [PATCH] [PATCH] dm: ioctl: add noflush suspend Provide a dm ioctl option to request noflush suspending. (See next patch for what this is for.) As the interface is extended, the version number is incremented. Other than accepting the new option through the interface, There is no change to existing behaviour. Test results: Confirmed the option is given from user-space correctly. Signed-off-by: Kiyoshi Ueda Signed-off-by: Jun'ichi Nomura Signed-off-by: Alasdair G Kergon Cc: dm-devel@redhat.com Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/md/dm-ioctl.c | 4 ++++ drivers/md/dm.h | 1 + include/linux/dm-ioctl.h | 9 +++++++-- 3 files changed, 12 insertions(+), 2 deletions(-) diff --git a/drivers/md/dm-ioctl.c b/drivers/md/dm-ioctl.c index 6d7a3d0c8f88..cd6a184536a1 100644 --- a/drivers/md/dm-ioctl.c +++ b/drivers/md/dm-ioctl.c @@ -774,6 +774,8 @@ static int do_suspend(struct dm_ioctl *param) if (param->flags & DM_SKIP_LOCKFS_FLAG) suspend_flags &= ~DM_SUSPEND_LOCKFS_FLAG; + if (param->flags & DM_NOFLUSH_FLAG) + suspend_flags |= DM_SUSPEND_NOFLUSH_FLAG; if (!dm_suspended(md)) r = dm_suspend(md, suspend_flags); @@ -815,6 +817,8 @@ static int do_resume(struct dm_ioctl *param) /* Suspend if it isn't already suspended */ if (param->flags & DM_SKIP_LOCKFS_FLAG) suspend_flags &= ~DM_SUSPEND_LOCKFS_FLAG; + if (param->flags & DM_NOFLUSH_FLAG) + suspend_flags |= DM_SUSPEND_NOFLUSH_FLAG; if (!dm_suspended(md)) dm_suspend(md, suspend_flags); diff --git a/drivers/md/dm.h b/drivers/md/dm.h index 293d5ce62a21..c307ca9a4c33 100644 --- a/drivers/md/dm.h +++ b/drivers/md/dm.h @@ -47,6 +47,7 @@ * Suspend feature flags */ #define DM_SUSPEND_LOCKFS_FLAG (1 << 0) +#define DM_SUSPEND_NOFLUSH_FLAG (1 << 1) /* * List of devices that a metadevice uses and should open/close. diff --git a/include/linux/dm-ioctl.h b/include/linux/dm-ioctl.h index 8853fc4d1c5e..b93486107821 100644 --- a/include/linux/dm-ioctl.h +++ b/include/linux/dm-ioctl.h @@ -285,9 +285,9 @@ typedef char ioctl_struct[308]; #define DM_DEV_SET_GEOMETRY _IOWR(DM_IOCTL, DM_DEV_SET_GEOMETRY_CMD, struct dm_ioctl) #define DM_VERSION_MAJOR 4 -#define DM_VERSION_MINOR 10 +#define DM_VERSION_MINOR 11 #define DM_VERSION_PATCHLEVEL 0 -#define DM_VERSION_EXTRA "-ioctl (2006-09-14)" +#define DM_VERSION_EXTRA "-ioctl (2006-10-12)" /* Status bits */ #define DM_READONLY_FLAG (1 << 0) /* In/Out */ @@ -323,4 +323,9 @@ typedef char ioctl_struct[308]; */ #define DM_SKIP_LOCKFS_FLAG (1 << 10) /* In */ +/* + * Set this to suspend without flushing queued ios. + */ +#define DM_NOFLUSH_FLAG (1 << 11) /* In */ + #endif /* _LINUX_DM_IOCTL_H */ -- 2.20.1