This patch adds the feature to use the kernel fastsuspend feature
to the device-mapper user-space tool.
For dmsetup:
# dmsetup --fastsuspend suspend <map name>
For library users:
int dm_task_fastsuspend(struct dm_task *dmt);
This patch is for the latest CVS tree.
Regards,
Kiyoshi Ueda
diff -rup device-mapper.1.02.08.cvs20060623/dmsetup/dmsetup.c fastsusp/dmsetup/dmsetup.c
--- device-mapper.1.02.08.cvs20060623/dmsetup/dmsetup.c 2006-06-23 16:10:31.000000000 -0400
+++ fastsusp/dmsetup/dmsetup.c 2006-06-23 16:22:16.000000000 -0400
@@ -88,6 +88,7 @@ enum {
READ_ONLY = 0,
COLS_ARG,
EXEC_ARG,
+ FASTSUSPEND_ARG,
FORCE_ARG,
GID_ARG,
MAJOR_ARG,
@@ -588,6 +589,9 @@ static int _simple(int task, const char
if (event_nr && !dm_task_set_event_nr(dmt, event_nr))
goto out;
+ if (_switches[FASTSUSPEND_ARG] && !dm_task_fastsuspend(dmt))
+ goto out;
+
if (_switches[NOOPENCOUNT_ARG] && !dm_task_no_open_count(dmt))
goto out;
@@ -1502,7 +1506,8 @@ static void _usage(FILE *out)
fprintf(out, "Usage:\n\n");
fprintf(out, "dmsetup [--version] [-v|--verbose [-v|--verbose ...]]\n"
- " [-r|--readonly] [--noopencount] [--nolockfs]\n\n");
+ " [-r|--readonly] [--noopencount] [--nolockfs]\n"
+ " [--fastsuspend]\n\n");
for (i = 0; _commands[i].name; i++)
fprintf(out, "\t%s %s\n", _commands[i].name, _commands[i].help);
fprintf(out, "\n<device> may be device name or -u <uuid> or "
@@ -1601,6 +1606,7 @@ static int _process_switches(int *argc,
{"readonly", 0, &ind, READ_ONLY},
{"columns", 0, &ind, COLS_ARG},
{"exec", 1, &ind, EXEC_ARG},
+ {"fastsuspend", 0, &ind, FASTSUSPEND_ARG},
{"force", 0, &ind, FORCE_ARG},
{"gid", 1, &ind, GID_ARG},
{"major", 1, &ind, MAJOR_ARG},
@@ -1714,6 +1720,8 @@ static int _process_switches(int *argc,
_switches[TARGET_ARG]++;
_target = optarg;
}
+ if ((ind == FASTSUSPEND_ARG))
+ _switches[FASTSUSPEND_ARG]++;
if ((ind == NOHEADINGS_ARG))
_switches[NOHEADINGS_ARG]++;
if ((ind == NOLOCKFS_ARG))
diff -rup device-mapper.1.02.08.cvs20060623/kernel/ioctl/dm-ioctl.h fastsusp/kernel/ioctl/dm-ioctl.h
--- device-mapper.1.02.08.cvs20060623/kernel/ioctl/dm-ioctl.h 2006-06-23 16:10:35.000000000 -0400
+++ fastsusp/kernel/ioctl/dm-ioctl.h 2006-06-23 16:34:12.000000000 -0400
@@ -326,4 +326,9 @@ typedef char ioctl_struct[308];
*/
#define DM_SKIP_LOCKFS_FLAG (1 << 10) /* In */
+/*
+ * Set this to suspend without flushing queued ios.
+ */
+#define DM_FASTSUSPEND_FLAG (1 << 11) /* In */
+
#endif /* _LINUX_DM_IOCTL_H */
diff -rup device-mapper.1.02.08.cvs20060623/lib/.exported_symbols fastsusp/lib/.exported_symbols
--- device-mapper.1.02.08.cvs20060623/lib/.exported_symbols 2006-06-23 16:10:35.000000000 -0400
+++ fastsusp/lib/.exported_symbols 2006-06-23 16:23:09.000000000 -0400
@@ -28,6 +28,7 @@ dm_task_set_gid
dm_task_set_mode
dm_task_suppress_identical_reload
dm_task_add_target
+dm_task_fastsuspend
dm_task_no_open_count
dm_task_skip_lockfs
dm_task_update_nodes
diff -rup device-mapper.1.02.08.cvs20060623/lib/ioctl/libdm-iface.c fastsusp/lib/ioctl/libdm-iface.c
--- device-mapper.1.02.08.cvs20060623/lib/ioctl/libdm-iface.c 2006-06-23 16:10:34.000000000 -0400
+++ fastsusp/lib/ioctl/libdm-iface.c 2006-06-23 16:24:14.000000000 -0400
@@ -1026,6 +1026,13 @@ int dm_task_set_geometry(struct dm_task
return 1;
}
+int dm_task_fastsuspend(struct dm_task *dmt)
+{
+ dmt->fastsuspend = 1;
+
+ return 1;
+}
+
int dm_task_no_open_count(struct dm_task *dmt)
{
dmt->no_open_count = 1;
@@ -1270,6 +1277,8 @@ static struct dm_ioctl *_flatten(struct
if (dmt->type == DM_DEVICE_SUSPEND)
dmi->flags |= DM_SUSPEND_FLAG;
+ if (dmt->fastsuspend)
+ dmi->flags |= DM_FASTSUSPEND_FLAG;
if (dmt->read_only)
dmi->flags |= DM_READONLY_FLAG;
if (dmt->skip_lockfs)
diff -rup device-mapper.1.02.08.cvs20060623/lib/ioctl/libdm-targets.h fastsusp/lib/ioctl/libdm-targets.h
--- device-mapper.1.02.08.cvs20060623/lib/ioctl/libdm-targets.h 2006-06-23 16:10:34.000000000 -0400
+++ fastsusp/lib/ioctl/libdm-targets.h 2006-06-23 16:24:40.000000000 -0400
@@ -52,6 +52,7 @@ struct dm_task {
char *message;
char *geometry;
uint64_t sector;
+ int fastsuspend;
int no_open_count;
int skip_lockfs;
int suppress_identical_reload;
diff -rup device-mapper.1.02.08.cvs20060623/lib/libdevmapper.h fastsusp/lib/libdevmapper.h
--- device-mapper.1.02.08.cvs20060623/lib/libdevmapper.h 2006-06-23 16:10:35.000000000 -0400
+++ fastsusp/lib/libdevmapper.h 2006-06-23 16:25:04.000000000 -0400
@@ -150,6 +150,7 @@ int dm_task_set_event_nr(struct dm_task
int dm_task_set_geometry(struct dm_task *dmt, const char *cylinders, const char *heads, const char *sectors, const char *start);
int dm_task_set_message(struct dm_task *dmt, const char *message);
int dm_task_set_sector(struct dm_task *dmt, uint64_t sector);
+int dm_task_fastsuspend(struct dm_task *dmt);
int dm_task_no_open_count(struct dm_task *dmt);
int dm_task_skip_lockfs(struct dm_task *dmt);
int dm_task_suppress_identical_reload(struct dm_task *dmt);
--
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