From: Kiyoshi Ueda <k-ueda@xxxxxxxxxxxxx> This patch changes the interface of dm_suspend() so that we can pass several options without increasing the number of parameters. The existing 'do_lockfs' integer parameter is replaced by a flag DM_SUSPEND_LOCKFS_FLAG. There is no functional change to the code. Test results: I have tested 'dmsetup suspend' command with/without the '--nolockfs' option and confirmed the do_lockfs value is correctly set. Signed-off-by: Kiyoshi Ueda <k-ueda@xxxxxxxxxxxxx> Signed-off-by: Jun'ichi Nomura <j-nomura@xxxxxxxxxxxxx> Signed-off-by: Alasdair G Kergon <agk@xxxxxxxxxx> Cc: dm-devel@xxxxxxxxxx Index: linux-2.6.19-rc6/drivers/md/dm.c =================================================================== --- linux-2.6.19-rc6.orig/drivers/md/dm.c 2006-11-22 17:26:56.000000000 +0000 +++ linux-2.6.19-rc6/drivers/md/dm.c 2006-11-22 17:26:57.000000000 +0000 @@ -1272,12 +1272,13 @@ static void unlock_fs(struct mapped_devi * dm_bind_table, dm_suspend must be called to flush any in * flight bios and ensure that any further io gets deferred. */ -int dm_suspend(struct mapped_device *md, int do_lockfs) +int dm_suspend(struct mapped_device *md, unsigned suspend_flags) { struct dm_table *map = NULL; DECLARE_WAITQUEUE(wait, current); struct bio *def; int r = -EINVAL; + int do_lockfs = suspend_flags & DM_SUSPEND_LOCKFS_FLAG ? 1 : 0; down(&md->suspend_lock); Index: linux-2.6.19-rc6/drivers/md/dm.h =================================================================== --- linux-2.6.19-rc6.orig/drivers/md/dm.h 2006-11-22 17:26:46.000000000 +0000 +++ linux-2.6.19-rc6/drivers/md/dm.h 2006-11-22 17:26:57.000000000 +0000 @@ -33,6 +33,11 @@ #define SECTOR_SHIFT 9 /* + * Suspend feature flags + */ +#define DM_SUSPEND_LOCKFS_FLAG (1 << 0) + +/* * List of devices that a metadevice uses and should open/close. */ struct dm_dev { Index: linux-2.6.19-rc6/drivers/md/dm-ioctl.c =================================================================== --- linux-2.6.19-rc6.orig/drivers/md/dm-ioctl.c 2006-11-22 17:26:46.000000000 +0000 +++ linux-2.6.19-rc6/drivers/md/dm-ioctl.c 2006-11-22 17:26:57.000000000 +0000 @@ -765,7 +765,7 @@ out: static int do_suspend(struct dm_ioctl *param) { int r = 0; - int do_lockfs = 1; + unsigned suspend_flags = DM_SUSPEND_LOCKFS_FLAG; struct mapped_device *md; md = find_device(param); @@ -773,10 +773,10 @@ static int do_suspend(struct dm_ioctl *p return -ENXIO; if (param->flags & DM_SKIP_LOCKFS_FLAG) - do_lockfs = 0; + suspend_flags &= ~DM_SUSPEND_LOCKFS_FLAG; if (!dm_suspended(md)) - r = dm_suspend(md, do_lockfs); + r = dm_suspend(md, suspend_flags); if (!r) r = __dev_status(md, param); @@ -788,7 +788,7 @@ static int do_suspend(struct dm_ioctl *p static int do_resume(struct dm_ioctl *param) { int r = 0; - int do_lockfs = 1; + unsigned suspend_flags = DM_SUSPEND_LOCKFS_FLAG; struct hash_cell *hc; struct mapped_device *md; struct dm_table *new_map; @@ -814,9 +814,9 @@ static int do_resume(struct dm_ioctl *pa if (new_map) { /* Suspend if it isn't already suspended */ if (param->flags & DM_SKIP_LOCKFS_FLAG) - do_lockfs = 0; + suspend_flags &= ~DM_SUSPEND_LOCKFS_FLAG; if (!dm_suspended(md)) - dm_suspend(md, do_lockfs); + dm_suspend(md, suspend_flags); r = dm_swap_table(md, new_map); if (r) { Index: linux-2.6.19-rc6/include/linux/device-mapper.h =================================================================== --- linux-2.6.19-rc6.orig/include/linux/device-mapper.h 2006-11-22 17:26:46.000000000 +0000 +++ linux-2.6.19-rc6/include/linux/device-mapper.h 2006-11-22 17:26:57.000000000 +0000 @@ -173,7 +173,7 @@ void *dm_get_mdptr(struct mapped_device /* * A device can still be used while suspended, but I/O is deferred. */ -int dm_suspend(struct mapped_device *md, int with_lockfs); +int dm_suspend(struct mapped_device *md, unsigned suspend_flags); int dm_resume(struct mapped_device *md); /* -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel