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Message-Id: <20061219.171541.102766013.k-ueda@ct.jp.nec.com>
Date: Tue, 19 Dec 2006 17:15:41 -0500 (EST)
From: Kiyoshi Ueda <k-ueda@...jp.nec.com>
To: jens.axboe@...cle.com, agk@...hat.com, mchristi@...hat.com,
linux-kernel@...r.kernel.org, dm-devel@...hat.com
Cc: j-nomura@...jp.nec.com, k-ueda@...jp.nec.com
Subject: [RFC PATCH APPENDIX] rqbased-dm: add API to libdevmapper
This patch adds the feature to use the kernel request-based dm feature
to the device-mapper user-space tool.
For dmsetup:
# dmsetup --rqbase create <device name>
For library users:
int dm_task_request_base(struct dm_task *dmt);
This patch is for device-mapper-1.02.13.
diff -rupN dm-1.02.13/dmsetup/dmsetup.c dm-1.02.13.rqbase/dmsetup/dmsetup.c
--- dm-1.02.13/dmsetup/dmsetup.c 2006-10-19 11:34:50.000000000 -0400
+++ dm-1.02.13.rqbase/dmsetup/dmsetup.c 2006-12-12 16:39:35.000000000 -0500
@@ -114,6 +114,7 @@ enum {
NOOPENCOUNT_ARG,
NOTABLE_ARG,
OPTIONS_ARG,
+ RQBASE_ARG,
SHOWKEYS_ARG,
TABLE_ARG,
TARGET_ARG,
@@ -458,6 +459,9 @@ static int _create(int argc, char **argv
if (_switches[NOOPENCOUNT_ARG] && !dm_task_no_open_count(dmt))
goto out;
+ if (_switches[RQBASE_ARG] && !dm_task_request_base(dmt))
+ goto out;
+
if (!dm_task_run(dmt))
goto out;
@@ -1522,7 +1526,7 @@ struct command {
static struct command _commands[] = {
{"create", "<dev_name> [-j|--major <major> -m|--minor <minor>]\n"
"\t [-U|--uid <uid>] [-G|--gid <gid>] [-M|--mode <octal_mode>]\n"
- "\t [-u|uuid <uuid>]\n"
+ "\t [-u|uuid <uuid>] [--rqbase]\n"
"\t [--notable | --table <table> | <table_file>]",
1, 2, _create},
{"remove", "[-f|--force] <device>", 0, 1, _remove},
@@ -1884,6 +1888,7 @@ static int _process_switches(int *argc,
{"noopencount", 0, &ind, NOOPENCOUNT_ARG},
{"notable", 0, &ind, NOTABLE_ARG},
{"options", 1, &ind, OPTIONS_ARG},
+ {"rqbase", 0, &ind, RQBASE_ARG},
{"showkeys", 0, &ind, SHOWKEYS_ARG},
{"table", 1, &ind, TABLE_ARG},
{"target", 1, &ind, TARGET_ARG},
@@ -2005,6 +2010,8 @@ static int _process_switches(int *argc,
_switches[NOLOCKFS_ARG]++;
if ((ind == NOOPENCOUNT_ARG))
_switches[NOOPENCOUNT_ARG]++;
+ if ((ind == RQBASE_ARG))
+ _switches[RQBASE_ARG]++;
if ((ind == SHOWKEYS_ARG))
_switches[SHOWKEYS_ARG]++;
if ((ind == TABLE_ARG)) {
diff -rupN dm-1.02.13/kernel/ioctl/dm-ioctl.h dm-1.02.13.rqbase/kernel/ioctl/dm-ioctl.h
--- dm-1.02.13/kernel/ioctl/dm-ioctl.h 2006-10-12 11:42:24.000000000 -0400
+++ dm-1.02.13.rqbase/kernel/ioctl/dm-ioctl.h 2006-12-12 16:42:18.000000000 -0500
@@ -330,4 +330,9 @@ typedef char ioctl_struct[308];
*/
#define DM_NOFLUSH_FLAG (1 << 11) /* In */
+/*
+ * Set this to create request based device-mapper device.
+ */
+#define DM_REQUEST_BASE_FLAG (1 << 12) /* In */
+
#endif /* _LINUX_DM_IOCTL_H */
diff -rupN dm-1.02.13/lib/.exported_symbols dm-1.02.13.rqbase/lib/.exported_symbols
--- dm-1.02.13/lib/.exported_symbols 2006-10-12 11:42:24.000000000 -0400
+++ dm-1.02.13.rqbase/lib/.exported_symbols 2006-12-12 16:43:18.000000000 -0500
@@ -30,6 +30,7 @@ dm_task_suppress_identical_reload
dm_task_add_target
dm_task_no_flush
dm_task_no_open_count
+dm_task_request_base
dm_task_skip_lockfs
dm_task_update_nodes
dm_task_run
diff -rupN dm-1.02.13/lib/ioctl/libdm-iface.c dm-1.02.13.rqbase/lib/ioctl/libdm-iface.c
--- dm-1.02.13/lib/ioctl/libdm-iface.c 2006-10-12 13:29:05.000000000 -0400
+++ dm-1.02.13.rqbase/lib/ioctl/libdm-iface.c 2006-12-12 17:02:43.000000000 -0500
@@ -1040,6 +1040,13 @@ int dm_task_no_open_count(struct dm_task
return 1;
}
+int dm_task_request_base(struct dm_task *dmt)
+{
+ dmt->request_base = 1;
+
+ return 1;
+}
+
int dm_task_skip_lockfs(struct dm_task *dmt)
{
dmt->skip_lockfs = 1;
@@ -1283,6 +1290,8 @@ static struct dm_ioctl *_flatten(struct
dmi->flags |= DM_READONLY_FLAG;
if (dmt->skip_lockfs)
dmi->flags |= DM_SKIP_LOCKFS_FLAG;
+ if (dmt->request_base)
+ dmi->flags |= DM_REQUEST_BASE_FLAG;
dmi->target_count = count;
dmi->event_nr = dmt->event_nr;
@@ -1415,6 +1424,7 @@ static int _create_and_load_v4(struct dm
task->uid = dmt->uid;
task->gid = dmt->gid;
task->mode = dmt->mode;
+ task->request_base = dmt->request_base;
r = dm_task_run(task);
dm_task_destroy(task);
@@ -1552,7 +1562,7 @@ static struct dm_ioctl *_do_dm_ioctl(str
dmi->flags |= DM_SKIP_BDGET_FLAG;
log_debug("dm %s %s %s%s%s %s%.0d%s%.0d%s"
- "%s%c%c%s %.0llu %s [%u]",
+ "%s%c%c%c%s %.0llu %s [%u]",
_cmd_data_v4[dmt->type].name,
dmi->name, dmi->uuid, dmt->newname ? " " : "",
dmt->newname ? dmt->newname : "",
@@ -1564,6 +1574,7 @@ static struct dm_ioctl *_do_dm_ioctl(str
dmt->major > 0 ? ") " : "",
dmt->no_open_count ? 'N' : 'O',
dmt->no_flush ? 'N' : 'F',
+ dmt->request_base ? 'R' : 'B',
dmt->skip_lockfs ? "S " : "",
dmt->sector, dmt->message ? dmt->message : "",
dmi->data_size);
diff -rupN dm-1.02.13/lib/ioctl/libdm-targets.h dm-1.02.13.rqbase/lib/ioctl/libdm-targets.h
--- dm-1.02.13/lib/ioctl/libdm-targets.h 2006-10-12 13:29:05.000000000 -0400
+++ dm-1.02.13.rqbase/lib/ioctl/libdm-targets.h 2006-12-12 16:59:28.000000000 -0500
@@ -54,6 +54,7 @@ struct dm_task {
uint64_t sector;
int no_flush;
int no_open_count;
+ int request_base;
int skip_lockfs;
int suppress_identical_reload;
diff -rupN dm-1.02.13/lib/libdevmapper.h dm-1.02.13.rqbase/lib/libdevmapper.h
--- dm-1.02.13/lib/libdevmapper.h 2006-10-12 11:42:24.000000000 -0400
+++ dm-1.02.13.rqbase/lib/libdevmapper.h 2006-12-12 17:00:04.000000000 -0500
@@ -153,6 +153,7 @@ int dm_task_set_message(struct dm_task *
int dm_task_set_sector(struct dm_task *dmt, uint64_t sector);
int dm_task_no_flush(struct dm_task *dmt);
int dm_task_no_open_count(struct dm_task *dmt);
+int dm_task_request_base(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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