+++ /dev/null
-Christophe Varoqui, <christophe.varoqui@free.fr>
+++ /dev/null
-
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-That's all there is to it!
+++ /dev/null
-2004-02-21 multipath-018
- * From the Debian SID inclusion review (Philipp Matthias Hahn)
- * use DESTDIR install prefix in the Makefile
- * add man pages for devmap_name & multipath
- * correct libsysfs.h includes
- * fork the hotplug script in its own shell
- * Sync with the kernel device mapper code as of 2.6.3-udm3
- ie. Remove the test interval parameter and its uses
- * Remove superfluous scsi parameter passed from hotplug
- * Add the man pages to the [un]install targets
-2004-02-17 multipath-017
- * remove the restrictive -f flag.
- Introduce a more generic "-m iopolicy" one.
- * remove useless "int with_sysfs" in env struct
-2004-02-04 multipath-016
- * add a GROUP_BY_SERIAL flag. This should be useful for
- controlers that activate they spare paths on simple IO
- submition with a penalty. The StorageWorks HW defaults to
- this mode, even if the MULTIBUS mode is OK.
- * remove unused sg_err.c
- * big restructuring : split devinfo.c from main.c. Export :
- * void basename (char *, char *);
- * int get_serial (int, char *);
- * int get_lun_strings (char *, char *, char *, char *);
- * int get_evpd_wwid(char *, char *);
- * long get_disk_size (char *);
- * stop passing struct env as param
- * add devmap_name proggy for udev to name devmaps as per their
- internal DM name and not only by their sysfs enum name (dm-*)
- The corresponding udev.rules line is :
- KERNEL="dm-[0-9]*", PROGRAM="/sbin/devmap_name %M %m", NAME="%k", SYMLINK="%c"
- * remove make_dm_node fn & call. Rely on udev for this.
- * don't rely on the linux symlink in the udev/klibc dir since
- udev build doesn't use it anymore. This corrects build breakage
-2004-01-19 multipath-013
- * update the DM target synthax to the 2.6.0-udm5 style
-2003-12-29 multipath-012
- * check hotplug event refers to a block device; if not exit early
- * refresh doc
- * add the uninstall target in Makefile
-2003-12-22 multipath-010
- * tweak the install target in Makefile
- * stop passing fds as argument : this change enable a strict
- segregation of ugly 2.4 code
- * sysfs version of get_lun_strings()
- * be careful about the return of get_unique_id() since errors
- formerly caught up by if(open()) in the caller fn are now returned
- by get_unique_id()
- * send get_serial() in unused.c
- * introduce dm-simplecmd for RESUME & SUSPEND requests
- * split add_map() in setup_map() & dm-addmap()
- * setup_map() correctly submits "SUSPEND-RELOAD-RESUME or CREATE"
- sequences instead of the bogus "RELOAD or CREATE"
- * don't print .sg_dev if equal to .dev (2.6) in print_path()
- * since the kernel code handles defective paths, remove all
- code to cope with them :
- * move do_tur() to unused.c
- * remove .state from path struct
- * remove .state settings & conditionals
- * add a cmdline switch to force maps to failover mode,
- ie 1 path per priority group
- * add default policies to the whitelist array (spread io ==
- MULTIBUS / io forced to 1 path == FAILOVER)
- * move get_disk_size() call out of add_map() to coalesce()
- * comment tricky coalesce() fn
- * bogus unsused.c file renamed to unused.c
-2003-12-20 multipath-010
- * big ChangeLog update
- * start to give a little control over target params :
- introduce cmdline arg -i to control polling interval
- * cope with hotplug-style calling convention :
- ie "multipath scsi $DEVPATH" ... to avoid messing with
- online maps not concerned by an event
- * example hotplug agent to drop in /etc/hotplug.d/scsi
- * revert the run & resched patch : unless someone proves me
- wrong, this was overdesigned
- * move commented out functions in unused.c
- * update multipath target params to "udm[23] style"
- * mp target now supports nr_path == 1, so do we
- * add gratuitous free()
- * push version forward
-2003-12-15 multipath-009
- * Make the HW-specific get_unique_id switch pretty
- * Prepare to field-test by whitelisting all known fibre array,
- try to fetch WWID from the standard EVPD 0x83 off 8 for everyone
- * configure the multipath target with round-robin path selector and
- conservative default for a start (udm1 style) :
- yes it makes this release the firstreally useful one.
- * temporarily disable map creation for single path device
- due to current restrictive defaults in the kernel target.
- Sistina should work it out.
- * correct the strncmp logic in blacklist function.
- * update the Makefiles to autodetect libgcc.a & gcc includes
- "ulibc-style". Factorisation of udevdirs & others niceties
- * drop a hint about absent /dev/sd? on failed open()
- * implement a reschedule flag in /var/run.
- Last thing the prog do before exit is check if a call to multipath
- was done (but canceled by /var/run/multipath.run check) during its
- execution. If so restart themain loop.
- * implement a blacklist of sysfs bdev to not bother with for now
- (hd,md, dm, sr, scd, ram, raw).
- This avoid sending SG_IO to unappropiate devices.
- * Adds a /var/run/multipath.run handling to avoid simultaneous runs.
- * Remove a commented-out "printf"
- * drop a libdevmapper copy in extras/multipath;
- maybe discussions w/Sistina folks will bring a better solution in the future.
- * drop a putchar usage in libdevmapper to compile cleanly with klibc
- * drop another such usage of my own in main.c
- * massage the Makefile to compile libdevmapper against klibc
- * use "ld" to produce the binary rather than "gcc -static"
- * stop being stupid w/ uneeded major, minor & dev in main.c:dm_mk_node()
- * reverse to creating striped target for now because the multipath target
- is more hairy than expected initialy
- * push the version code to 009 to be in synch w/ udev
-2003-11-27 multipath-007
- * removes sg_err.[ch] deps
- * makes sure the core code play nice with klibc
- * port the sysfs calls to dlist helpers
- * links against udev's sysfs (need libsysfs.a & dlist.a)
- * finally define DM_TARGET as "multipath" as Joe posted the code today (not tested yet)
- * push version forward (do you want it in sync with udev version?)
-2003-11-19
- * merged in udev-006 tree
-2003-09-18 Christophe Varoqui <christophe.varoqui@free.fr>
- * multipath 0.0.1 released.
- * Initial release.
+++ /dev/null
-# Makefile
-#
-# Copyright (C) 2003 Christophe Varoqui, <christophe.varoqui@free.fr>
-
-EXEC = multipath
-
-prefix =
-exec_prefix = ${prefix}
-bindir = ${exec_prefix}/sbin
-udevdir = ../..
-klibcdir = $(udevdir)/klibc
-sysfsdir = $(udevdir)/libsysfs
-mandir = /usr/share/man/man8
-
-CC = gcc
-GZIP = /bin/gzip -c
-
-GCCINCDIR := ${shell $(CC) -print-search-dirs | sed -ne "s/install: \(.*\)/\1include/gp"}
-KERNEL_DIR = /lib/modules/${shell uname -r}/build
-CFLAGS = -pipe -g -O2 -Wall -Wunused -Wstrict-prototypes -nostdinc \
- -I$(klibcdir)/klibc/include -I$(klibcdir)/klibc/include/bits32 \
- -I$(GCCINCDIR) -I$(KERNEL_DIR)/include -I$(sysfsdir) -I.
-
-OBJS = devinfo.o main.o
-CRT0 = ../../klibc/klibc/crt0.o
-LIB = ../../klibc/klibc/libc.a
-LIBGCC := $(shell $(CC) -print-libgcc-file-name )
-
-DMOBJS = libdevmapper/libdm-common.o libdevmapper/ioctl/libdevmapper.o
-SYSFSOBJS = ../../libsysfs/dlist.o ../../libsysfs/sysfs_bus.o \
- ../../libsysfs/sysfs_class.o ../../libsysfs/sysfs_device.o \
- ../../libsysfs/sysfs_dir.o ../../libsysfs/sysfs_driver.o \
- ../../libsysfs/sysfs_utils.o
-
-SUBDIRS = libdevmapper
-
-recurse:
- @for dir in $(SUBDIRS); do\
- $(MAKE) KERNEL_DIR=$(KERNEL_DIR) -C $$dir ; \
- done
- $(MAKE) $(EXEC)
- $(MAKE) devmap_name
-
-all: recurse
- @echo ""
- @echo "Make complete"
-
-$(EXEC): $(OBJS)
- $(LD) -o $(EXEC) $(CRT0) $(OBJS) $(SYSFSOBJS) $(DMOBJS) $(LIB) $(LIBGCC)
- strip $(EXEC)
- $(GZIP) $(EXEC).8 > $(EXEC).8.gz
-
-devmap_name: devmap_name.o
- $(LD) -o devmap_name $(CRT0) devmap_name.o $(DMOBJS) $(LIB) $(LIBGCC)
- strip devmap_name
- $(GZIP) devmap_name.8 > devmap_name.8.gz
-
-clean:
- rm -f core *.o $(EXEC) devmap_name *.gz
- $(MAKE) -C libdevmapper clean
-
-install:
- install -d $(DESTDIR)$(bindir)
- install -m 755 $(EXEC) $(DESTDIR)$(bindir)/
- install -m 755 devmap_name $(DESTDIR)$(bindir)/
- install -d $(DESTDIR)/etc/hotplug.d/scsi/
- install -m 755 multipath.hotplug $(DESTDIR)/etc/hotplug.d/scsi/
- install -d $(DESTDIR)$(mandir)
- install -m 644 devmap_name.8.gz $(DESTDIR)$(mandir)
- install -m 644 multipath.8.gz $(DESTDIR)$(mandir)
-
-uninstall:
- rm $(DESTDIR)/etc/hotplug.d/scsi/multipath.hotplug
- rm $(DESTDIR)$(bindir)/$(EXEC)
- rm $(DESTDIR)$(bindir)/devmap_name
- rm $(DESTDIR)$(mandir)/devmap_name.8.gz
- rm $(DESTDIR)$(mandir)/multipath.8.gz
-
-# Code dependencies
-main.o: main.c main.h sg_include.h devinfo.h
+++ /dev/null
-Dependancies :
-==============
-
-o libdevmapper : comes with device-mapper-XXXX.tar.gz
- See www.sistina.com
- This lib has been dropped in the multipath tree
-o libsysfs : comes with sysutils or udev
- See ftp.kernel.org/pub/linux/utils/kernel/hotplug/
-o Linux kernel 2.6.0 with udm5 patchset
- http://people.sistina.com/~thornber/dm/
-o udev
- See ftp.kernel.org/pub/linux/utils/kernel/hotplug/
-
-How it works :
-==============
-
-Fill the all_paths array. Each path store this info :
-
-struct path {
- char dev[FILE_NAME_SIZE];
- char sg_dev[FILE_NAME_SIZE];
- struct scsi_idlun scsi_id;
- struct sg_id sg_id;
- int state;
- char wwid[WWID_SIZE];
-};
-
-scsi_id, sg_dev and sg_id are only really useful for 2.4
-kernels, for which SG cmnds must go through sg devs.
-In 2.5+ we have the nice opportunity to send SG cmnds
-through SCSI bdevs.
-
-For 2.4 compat, we pivot on idlun tupple to map sg devs
-to SCSI bdevs.
-
-2.4 does not do device enumeration, so we must scan a
-defined number of sg devs and scsi bdevs. Good enough.
-In 2.5+, we rely on libsysfs (sysutils) to access to
-sysfs device enums.
-
-the wwid is retrieved by a switch fonction. Only White
-Listed HW can filled this field. For now every FC array
-HW listed in kernel's devinfo.c is White Listed, assuming
-the WWID is stored is the SCSI-3 standard 0x83 EVPD page.
-
-When all_paths is filled, we coalesce the paths and store
-the result in mp array. Each mp is a struct like this :
-
-struct multipath {
- char wwid[WWID_SIZE];
- int npaths;
- int pindex[MAX_MP_PATHS];
-};
-
-When mp is filled, the device maps are fed to the kernel
-through libdevmapper.
-
-The naming of the corresponding block device is handeld
-by udev with the help of the devmap_name proggy. It is
-called by the following rule in /etc/udev/udev.rules :
-KERNEL="dm-[0-9]*", PROGRAM="/sbin/devmap_name %M %m", \
-NAME="%k", SYMLINK="%c"
-
-Notes :
-=======
-
-o On 2.4, make sure you have enough /dev/sg* nodes
- (/dev/MAKEDEV if necesary). Same goes for /dev/sd*
-
-o path coalescing relies on a path unique id being found.
- This unique id, lacking a standard method, is vendor
- specific. A switch function (get_unique_id) is present
- and an example function is provided for storageworks
- arrays (get_evpd_wwid). Feel free to enrich
- with hardware you have at hand :)
-
-o The kernel does NOT manage properly ghosts paths
- with StorageWorks HW. Seems nobody cares after a load
- of posts to linux-scsi.
-
-o 2.4.21 version of DM does not like even segment size.
- if you enconter pbs with this, upgrade DM.
-
-Credits :
-=========
-
-o Heavy cut'n paste from sg_utils. Thanks goes to D.
- Gilbert.
-o Light cut'n paste from dmsetup. Thanks Joe Thornber.
-o Greg KH for the nice sysfs API.
+++ /dev/null
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <fcntl.h>
-#include <sys/ioctl.h>
-#include <sysfs/libsysfs.h>
-#include "devinfo.h"
-#include "sg_include.h"
-
-#define FILE_NAME_SIZE 255
-
-void
-basename(char * str1, char * str2)
-{
- char *p = str1 + (strlen(str1) - 1);
-
- while (*--p != '/')
- continue;
- strcpy(str2, ++p);
-}
-
-static int
-do_inq(int sg_fd, int cmddt, int evpd, unsigned int pg_op,
- void *resp, int mx_resp_len, int noisy)
-{
- unsigned char inqCmdBlk[INQUIRY_CMDLEN] =
- { INQUIRY_CMD, 0, 0, 0, 0, 0 };
- unsigned char sense_b[SENSE_BUFF_LEN];
- struct sg_io_hdr io_hdr;
-
- if (cmddt)
- inqCmdBlk[1] |= 2;
- if (evpd)
- inqCmdBlk[1] |= 1;
- inqCmdBlk[2] = (unsigned char) pg_op;
- inqCmdBlk[4] = (unsigned char) mx_resp_len;
- memset(&io_hdr, 0, sizeof (struct sg_io_hdr));
- io_hdr.interface_id = 'S';
- io_hdr.cmd_len = sizeof (inqCmdBlk);
- io_hdr.mx_sb_len = sizeof (sense_b);
- io_hdr.dxfer_direction = SG_DXFER_FROM_DEV;
- io_hdr.dxfer_len = mx_resp_len;
- io_hdr.dxferp = resp;
- io_hdr.cmdp = inqCmdBlk;
- io_hdr.sbp = sense_b;
- io_hdr.timeout = DEF_TIMEOUT;
-
- if (ioctl(sg_fd, SG_IO, &io_hdr) < 0) {
- perror("SG_IO (inquiry) error");
- return -1;
- }
-
- /* treat SG_ERR here to get rid of sg_err.[ch] */
- io_hdr.status &= 0x7e;
- if ((0 == io_hdr.status) && (0 == io_hdr.host_status) &&
- (0 == io_hdr.driver_status))
- return 0;
- if ((SCSI_CHECK_CONDITION == io_hdr.status) ||
- (SCSI_COMMAND_TERMINATED == io_hdr.status) ||
- (SG_ERR_DRIVER_SENSE == (0xf & io_hdr.driver_status))) {
- if (io_hdr.sbp && (io_hdr.sb_len_wr > 2)) {
- int sense_key;
- unsigned char * sense_buffer = io_hdr.sbp;
- if (sense_buffer[0] & 0x2)
- sense_key = sense_buffer[1] & 0xf;
- else
- sense_key = sense_buffer[2] & 0xf;
- if(RECOVERED_ERROR == sense_key)
- return 0;
- }
- }
- return -1;
-}
-
-int
-get_serial (char * str, char * devname)
-{
- int fd;
- int len;
- char buff[MX_ALLOC_LEN + 1];
-
- if ((fd = open(devname, O_RDONLY)) < 0)
- return 0;
-
- if (0 == do_inq(fd, 0, 1, 0x80, buff, MX_ALLOC_LEN, 0)) {
- len = buff[3];
- if (len > 0) {
- memcpy(str, buff + 4, len);
- buff[len] = '\0';
- }
- close(fd);
- return 1;
- }
- close(fd);
- return 0;
-}
-
-int
-get_lun_strings(char * vendor_id, char * product_id, char * rev, char * devname)
-{
- int fd;
- char buff[36];
- char attr_path[FILE_NAME_SIZE];
- char sysfs_path[FILE_NAME_SIZE];
- char basedev[FILE_NAME_SIZE];
-
- if (0 == sysfs_get_mnt_path(sysfs_path, FILE_NAME_SIZE)) {
- /* sysfs style */
- basename(devname, basedev);
-
- sprintf(attr_path, "%s/block/%s/device/vendor",
- sysfs_path, basedev);
- if (0 > sysfs_read_attribute_value(attr_path,
- vendor_id, 8)) return 0;
-
- sprintf(attr_path, "%s/block/%s/device/model",
- sysfs_path, basedev);
- if (0 > sysfs_read_attribute_value(attr_path,
- product_id, 16)) return 0;
-
- sprintf(attr_path, "%s/block/%s/device/rev",
- sysfs_path, basedev);
- if (0 > sysfs_read_attribute_value(attr_path,
- rev, 4)) return 0;
- } else {
- /* ioctl style */
- if ((fd = open(devname, O_RDONLY)) < 0)
- return 0;
- if (0 != do_inq(fd, 0, 0, 0, buff, 36, 1))
- return 0;
- memcpy(vendor_id, &buff[8], 8);
- memcpy(product_id, &buff[16], 16);
- memcpy(rev, &buff[32], 4);
- close(fd);
- return 1;
- }
- return 0;
-}
-
-static void
-sprint_wwid(char * buff, const char * str)
-{
- int i;
- const char *p;
- char *cursor;
- unsigned char c;
-
- p = str;
- cursor = buff;
- for (i = 0; i <= WWID_SIZE / 2 - 1; i++) {
- c = *p++;
- sprintf(cursor, "%.2x", (int) (unsigned char) c);
- cursor += 2;
- }
- buff[WWID_SIZE - 1] = '\0';
-}
-
-/* get EVPD page 0x83 off 8 */
-/* tested ok with StorageWorks */
-int
-get_evpd_wwid(char * devname, char * wwid)
-{
- int fd;
- char buff[64];
-
- if ((fd = open(devname, O_RDONLY)) < 0)
- return 0;
-
- if (0 == do_inq(fd, 0, 1, 0x83, buff, sizeof (buff), 1)) {
- sprint_wwid(wwid, &buff[8]);
- close(fd);
- return 1; /* success */
- }
- close(fd);
- return 0; /* not good */
-}
-
-long
-get_disk_size (char * devname) {
- long size;
- int fd;
- char attr_path[FILE_NAME_SIZE];
- char sysfs_path[FILE_NAME_SIZE];
- char buff[FILE_NAME_SIZE];
- char basedev[FILE_NAME_SIZE];
-
- if (0 == sysfs_get_mnt_path(sysfs_path, FILE_NAME_SIZE)) {
- basename(devname, basedev);
- sprintf(attr_path, "%s/block/%s/size",
- sysfs_path, basedev);
- if (0 > sysfs_read_attribute_value(attr_path, buff,
- FILE_NAME_SIZE * sizeof(char)))
- return -1;
- size = atoi(buff);
- return size;
- } else {
- if ((fd = open(devname, O_RDONLY)) < 0)
- return -1;
- if(!ioctl(fd, BLKGETSIZE, &size))
- return size;
- }
- return -1;
-}
-
+++ /dev/null
-#define INQUIRY_CMDLEN 6
-#define INQUIRY_CMD 0x12
-#define SENSE_BUFF_LEN 32
-#define DEF_TIMEOUT 60000
-#define RECOVERED_ERROR 0x01
-#define MX_ALLOC_LEN 255
-#define WWID_SIZE 33
-#define BLKGETSIZE _IO(0x12,96)
-
-/* exerpt from "sg_err.h" */
-#define SCSI_CHECK_CONDITION 0x2
-#define SCSI_COMMAND_TERMINATED 0x22
-#define SG_ERR_DRIVER_SENSE 0x08
-
-void basename (char *, char *);
-int get_serial (char *, char *);
-int get_lun_strings (char *, char *, char *, char *);
-int get_evpd_wwid(char *, char *);
-long get_disk_size (char *);
+++ /dev/null
-.TH DEVMAP_NAME 8 "February 2004" "" "Linux Administrator's Manual"
-.SH NAME
-devmap_name \- Query device-mapper name
-.SH SYNOPSIS
-.BI devmap_name " major minor"
-.SH DESCRIPTION
-.B devmap_name
-queries the device-mapper for the name for the device
-specified by
-.I major
-and
-.I minor
-number.
-.br
-.B devmap_name
-can be called from
-.B udev
-by the following rule in
-.IR /etc/udev/udev.rules :
-.sp
-.nf
-KERNEL="dm-[0-9]*", PROGRAM="/sbin/devmap_name %M %m", \\
- NAME="%k", SYMLINK="%c"
-.fi
-.SH "SEE ALSO"
-.BR udev (8),
-.BR dmsetup (8)
-.SH AUTHORS
-.B devmap_name
-was developed by Christophe Varoqui, <christophe.varoqui@free.fr> and others.
+++ /dev/null
-#include "libdevmapper/libdevmapper.h"
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <ctype.h>
-#include <linux/kdev_t.h>
-
-static void usage(char * progname) {
- fprintf(stderr, "usage : %s major minor\n", progname);
- exit(1);
-}
-
-int main(int argc, char **argv)
-{
- int r = 0;
- struct dm_names *names;
- unsigned next = 0;
- int major, minor;
-
- /* sanity check */
- if (argc != 3)
- usage(argv[0]);
-
- major = atoi(argv[1]);
- minor = atoi(argv[2]);
-
- struct dm_task *dmt;
-
- if (!(dmt = dm_task_create(DM_DEVICE_LIST)))
- return 0;
-
- if (!dm_task_run(dmt))
- goto out;
-
- if (!(names = dm_task_get_names(dmt)))
- goto out;
-
- if (!names->dev) {
- printf("No devices found\n");
- goto out;
- }
-
- do {
- names = (void *) names + next;
- if ((int) MAJOR(names->dev) == major &&
- (int) MINOR(names->dev) == minor) {
- printf("%s\n", names->name);
- goto out;
- }
- next = names->next;
- } while (next);
-
- /* No correspondance found */
- r = 1;
-
- out:
- dm_task_destroy(dmt);
- return r;
-}
-
+++ /dev/null
-# Makefile
-#
-# Copyright (C) 2003 Christophe Varoqui, <christophe.varoqui@free.fr>
-
-CC = gcc
-udevdir = ../../..
-klibcdir = $(udevdir)/klibc
-
-CC = gcc
-GCCINCDIR := ${shell $(CC) -print-search-dirs | sed -ne "s/install: \(.*\)/\1include/gp"}
-CFLAGS = -pipe -g -O2 -Wall -Wunused -Wstrict-prototypes -nostdinc \
- -I$(klibcdir)/klibc/include -I$(klibcdir)/klibc/include/bits32 \
- -I$(GCCINCDIR) -I$(KERNEL_DIR)/include -I. -Iioctl
-
-OBJS = ioctl/libdevmapper.o libdm-common.o
-
-all: $(OBJS)
- @echo ""
- @echo "Make complete"
-
-clean:
- rm -f core *.o ioctl/*.o ioctl/*.so
+++ /dev/null
-/*
- * Copyright (C) 2001 Sistina Software (UK) Limited.
- *
- * This file is released under the LGPL.
- */
-
-#include "libdm-targets.h"
-#include "libdm-common.h"
-
-#ifdef DM_COMPAT
-# include "libdm-compat.h"
-#endif
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include <dirent.h>
-#include <errno.h>
-#include <sys/stat.h>
-#include <sys/ioctl.h>
-#include <limits.h>
-
-#ifdef linux
-# include <linux/limits.h>
-# include <linux/kdev_t.h>
-# include <linux/dm-ioctl.h>
-#else
-# define MAJOR(x) major((x))
-# define MINOR(x) minor((x))
-# define MKDEV(x,y) makedev((x),(y))
-#endif
-
-/*
- * Ensure build compatibility.
- * The hard-coded versions here are the highest present
- * in the _cmd_data arrays.
- */
-
-#if !((DM_VERSION_MAJOR == 1 && DM_VERSION_MINOR >= 0) || \
- (DM_VERSION_MAJOR == 4 && DM_VERSION_MINOR >= 0))
-#error The version of dm-ioctl.h included is incompatible.
-#endif
-
-/* dm major version no for running kernel */
-static int _dm_version = DM_VERSION_MAJOR;
-static int _log_suppress = 0;
-
-static int _control_fd = -1;
-static int _version_checked = 0;
-static int _version_ok = 1;
-
-/*
- * Support both old and new major numbers to ease the transition.
- * Clumsy, but only temporary.
- */
-#if DM_VERSION_MAJOR == 4 && defined(DM_COMPAT)
-const int _dm_compat = 1;
-#else
-const int _dm_compat = 0;
-#endif
-
-
-/* *INDENT-OFF* */
-static struct cmd_data _cmd_data_v4[] = {
- {"create", DM_DEV_CREATE, {4, 0, 0}},
- {"reload", DM_TABLE_LOAD, {4, 0, 0}},
- {"remove", DM_DEV_REMOVE, {4, 0, 0}},
- {"remove_all", DM_REMOVE_ALL, {4, 0, 0}},
- {"suspend", DM_DEV_SUSPEND, {4, 0, 0}},
- {"resume", DM_DEV_SUSPEND, {4, 0, 0}},
- {"info", DM_DEV_STATUS, {4, 0, 0}},
- {"deps", DM_TABLE_DEPS, {4, 0, 0}},
- {"rename", DM_DEV_RENAME, {4, 0, 0}},
- {"version", DM_VERSION, {4, 0, 0}},
- {"status", DM_TABLE_STATUS, {4, 0, 0}},
- {"table", DM_TABLE_STATUS, {4, 0, 0}},
- {"waitevent", DM_DEV_WAIT, {4, 0, 0}},
- {"names", DM_LIST_DEVICES, {4, 0, 0}},
- {"clear", DM_TABLE_CLEAR, {4, 0, 0}},
- {"mknodes", DM_DEV_STATUS, {4, 0, 0}},
-};
-/* *INDENT-ON* */
-
-#define ALIGNMENT_V1 sizeof(int)
-#define ALIGNMENT 8
-
-/* FIXME Rejig library to record & use errno instead */
-#ifndef DM_EXISTS_FLAG
-# define DM_EXISTS_FLAG 0x00000004
-#endif
-
-static void *_align(void *ptr, unsigned int a)
-{
- register unsigned long agn = --a;
-
- return (void *) (((unsigned long) ptr + agn) & ~agn);
-}
-
-static int _open_control(void)
-{
- char control[PATH_MAX];
-
- if (_control_fd != -1)
- return 1;
-
- snprintf(control, sizeof(control), "%s/control", dm_dir());
-
- if ((_control_fd = open(control, O_RDWR)) < 0) {
- log_error("%s: open failed: %s", control, strerror(errno));
- log_error("Is device-mapper driver missing from kernel?");
- return 0;
- }
-
- return 1;
-}
-
-void dm_task_destroy(struct dm_task *dmt)
-{
- struct target *t, *n;
-
- for (t = dmt->head; t; t = n) {
- n = t->next;
- free(t->params);
- free(t->type);
- free(t);
- }
-
- if (dmt->dev_name)
- free(dmt->dev_name);
-
- if (dmt->newname)
- free(dmt->newname);
-
- if (dmt->dmi.v4)
- free(dmt->dmi.v4);
-
- if (dmt->uuid)
- free(dmt->uuid);
-
- free(dmt);
-}
-
-/*
- * Protocol Version 1 compatibility functions.
- */
-
-#ifdef DM_COMPAT
-
-static int _dm_task_get_driver_version_v1(struct dm_task *dmt, char *version,
- size_t size)
-{
- unsigned int *v;
-
- if (!dmt->dmi.v1) {
- version[0] = '\0';
- return 0;
- }
-
- v = dmt->dmi.v1->version;
- snprintf(version, size, "%u.%u.%u", v[0], v[1], v[2]);
- return 1;
-}
-
-/* Unmarshall the target info returned from a status call */
-static int _unmarshal_status_v1(struct dm_task *dmt, struct dm_ioctl_v1 *dmi)
-{
- char *outbuf = (char *) dmi + dmi->data_start;
- char *outptr = outbuf;
- int32_t i;
- struct dm_target_spec_v1 *spec;
-
- for (i = 0; i < dmi->target_count; i++) {
- spec = (struct dm_target_spec_v1 *) outptr;
-
- if (!dm_task_add_target(dmt, spec->sector_start,
- (uint64_t) spec->length,
- spec->target_type,
- outptr + sizeof(*spec)))
- return 0;
-
- outptr = outbuf + spec->next;
- }
-
- return 1;
-}
-
-static int _dm_format_dev_v1(char *buf, int bufsize, uint32_t dev_major,
- uint32_t dev_minor)
-{
- int r;
-
- if (bufsize < 8)
- return 0;
-
- r = snprintf(buf, bufsize, "%03x:%03x", dev_major, dev_minor);
- if (r < 0 || r > bufsize - 1)
- return 0;
-
- return 1;
-}
-
-static int _dm_task_get_info_v1(struct dm_task *dmt, struct dm_info *info)
-{
- if (!dmt->dmi.v1)
- return 0;
-
- memset(info, 0, sizeof(*info));
-
- info->exists = dmt->dmi.v1->flags & DM_EXISTS_FLAG ? 1 : 0;
- if (!info->exists)
- return 1;
-
- info->suspended = dmt->dmi.v1->flags & DM_SUSPEND_FLAG ? 1 : 0;
- info->read_only = dmt->dmi.v1->flags & DM_READONLY_FLAG ? 1 : 0;
- info->target_count = dmt->dmi.v1->target_count;
- info->open_count = dmt->dmi.v1->open_count;
- info->event_nr = 0;
- info->major = MAJOR(dmt->dmi.v1->dev);
- info->minor = MINOR(dmt->dmi.v1->dev);
- info->live_table = 1;
- info->inactive_table = 0;
-
- return 1;
-}
-
-static const char *_dm_task_get_name_v1(struct dm_task *dmt)
-{
- return (dmt->dmi.v1->name);
-}
-
-static const char *_dm_task_get_uuid_v1(struct dm_task *dmt)
-{
- return (dmt->dmi.v1->uuid);
-}
-
-static struct dm_deps *_dm_task_get_deps_v1(struct dm_task *dmt)
-{
- log_error("deps version 1 no longer supported by libdevmapper");
- return NULL;
-}
-
-static struct dm_names *_dm_task_get_names_v1(struct dm_task *dmt)
-{
- return (struct dm_names *) (((void *) dmt->dmi.v1) +
- dmt->dmi.v1->data_start);
-}
-
-static void *_add_target_v1(struct target *t, void *out, void *end)
-{
- void *out_sp = out;
- struct dm_target_spec_v1 sp;
- size_t sp_size = sizeof(struct dm_target_spec_v1);
- int len;
- const char no_space[] = "Ran out of memory building ioctl parameter";
-
- out += sp_size;
- if (out >= end) {
- log_error(no_space);
- return NULL;
- }
-
- sp.status = 0;
- sp.sector_start = t->start;
- sp.length = t->length;
- strncpy(sp.target_type, t->type, sizeof(sp.target_type));
-
- len = strlen(t->params);
-
- if ((out + len + 1) >= end) {
- log_error(no_space);
-
- log_error("t->params= '%s'", t->params);
- return NULL;
- }
- strcpy((char *) out, t->params);
- out += len + 1;
-
- /* align next block */
- out = _align(out, ALIGNMENT_V1);
-
- sp.next = out - out_sp;
-
- memcpy(out_sp, &sp, sp_size);
-
- return out;
-}
-
-static struct dm_ioctl_v1 *_flatten_v1(struct dm_task *dmt)
-{
- const size_t min_size = 16 * 1024;
- const int (*version)[3];
-
- struct dm_ioctl_v1 *dmi;
- struct target *t;
- size_t len = sizeof(struct dm_ioctl_v1);
- void *b, *e;
- int count = 0;
-
- for (t = dmt->head; t; t = t->next) {
- len += sizeof(struct dm_target_spec_v1);
- len += strlen(t->params) + 1 + ALIGNMENT_V1;
- count++;
- }
-
- if (count && dmt->newname) {
- log_error("targets and newname are incompatible");
- return NULL;
- }
-
- if (dmt->newname)
- len += strlen(dmt->newname) + 1;
-
- /*
- * Give len a minimum size so that we have space to store
- * dependencies or status information.
- */
- if (len < min_size)
- len = min_size;
-
- if (!(dmi = malloc(len)))
- return NULL;
-
- memset(dmi, 0, len);
-
- version = &_cmd_data_v1[dmt->type].version;
-
- dmi->version[0] = (*version)[0];
- dmi->version[1] = (*version)[1];
- dmi->version[2] = (*version)[2];
-
- dmi->data_size = len;
- dmi->data_start = sizeof(struct dm_ioctl_v1);
-
- if (dmt->dev_name)
- strncpy(dmi->name, dmt->dev_name, sizeof(dmi->name));
-
- if (dmt->type == DM_DEVICE_SUSPEND)
- dmi->flags |= DM_SUSPEND_FLAG;
- if (dmt->read_only)
- dmi->flags |= DM_READONLY_FLAG;
-
- if (dmt->minor >= 0) {
- if (dmt->major <= 0) {
- log_error("Missing major number for persistent device");
- return NULL;
- }
- dmi->flags |= DM_PERSISTENT_DEV_FLAG;
- dmi->dev = MKDEV(dmt->major, dmt->minor);
- }
-
- if (dmt->uuid)
- strncpy(dmi->uuid, dmt->uuid, sizeof(dmi->uuid));
-
- dmi->target_count = count;
-
- b = (void *) (dmi + 1);
- e = (void *) ((char *) dmi + len);
-
- for (t = dmt->head; t; t = t->next)
- if (!(b = _add_target_v1(t, b, e)))
- goto bad;
-
- if (dmt->newname)
- strcpy(b, dmt->newname);
-
- return dmi;
-
- bad:
- free(dmi);
- return NULL;
-}
-
-static int _dm_names_v1(struct dm_ioctl_v1 *dmi)
-{
- const char *dev_dir = dm_dir();
- int r = 1, len;
- const char *name;
- struct dirent *dirent;
- DIR *d;
- struct dm_names *names, *old_names = NULL;
- void *end = (void *) dmi + dmi->data_size;
- struct stat buf;
- char path[PATH_MAX];
-
- if (!(d = opendir(dev_dir))) {
- log_error("%s: opendir failed: %s", dev_dir, strerror(errno));
- return 0;
- }
-
- names = (struct dm_names *) ((void *) dmi + dmi->data_start);
-
- names->dev = 0; /* Flags no data */
-
- while ((dirent = readdir(d))) {
- name = dirent->d_name;
-
- if (name[0] == '.' || !strcmp(name, "control"))
- continue;
-
- if (old_names)
- old_names->next = (uint32_t) ((void *) names -
- (void *) old_names);
- snprintf(path, sizeof(path), "%s/%s", dev_dir, name);
- if (stat(path, &buf)) {
- log_error("%s: stat failed: %s", path, strerror(errno));
- continue;
- }
- if (!S_ISBLK(buf.st_mode))
- continue;
- names->dev = (uint64_t) buf.st_rdev;
- names->next = 0;
- len = strlen(name);
- if (((void *) (names + 1) + len + 1) >= end) {
- log_error("Insufficient buffer space for device list");
- r = 0;
- break;
- }
-
- strcpy(names->name, name);
-
- old_names = names;
- names = _align((void *) ++names + len + 1, ALIGNMENT);
- }
-
- if (closedir(d))
- log_error("%s: closedir failed: %s", dev_dir, strerror(errno));
-
- return r;
-}
-
-static int _dm_task_run_v1(struct dm_task *dmt)
-{
- struct dm_ioctl_v1 *dmi;
- unsigned int command;
-
- dmi = _flatten_v1(dmt);
- if (!dmi) {
- log_error("Couldn't create ioctl argument");
- return 0;
- }
-
- if (!_open_control())
- return 0;
-
- if ((unsigned) dmt->type >=
- (sizeof(_cmd_data_v1) / sizeof(*_cmd_data_v1))) {
- log_error("Internal error: unknown device-mapper task %d",
- dmt->type);
- goto bad;
- }
-
- command = _cmd_data_v1[dmt->type].cmd;
-
- if (dmt->type == DM_DEVICE_TABLE)
- dmi->flags |= DM_STATUS_TABLE_FLAG;
-
- log_debug("dm %s %s %s %s", _cmd_data_v1[dmt->type].name, dmi->name,
- dmi->uuid, dmt->newname ? dmt->newname : "");
- if (dmt->type == DM_DEVICE_LIST) {
- if (!_dm_names_v1(dmi))
- goto bad;
- } else if (ioctl(_control_fd, command, dmi) < 0) {
- if (_log_suppress)
- log_verbose("device-mapper ioctl cmd %d failed: %s",
- _IOC_NR(command), strerror(errno));
- else
- log_error("device-mapper ioctl cmd %d failed: %s",
- _IOC_NR(command), strerror(errno));
- goto bad;
- }
-
- switch (dmt->type) {
- case DM_DEVICE_CREATE:
- add_dev_node(dmt->dev_name, MAJOR(dmi->dev), MINOR(dmi->dev));
- break;
-
- case DM_DEVICE_REMOVE:
- rm_dev_node(dmt->dev_name);
- break;
-
- case DM_DEVICE_RENAME:
- rename_dev_node(dmt->dev_name, dmt->newname);
- break;
-
- case DM_DEVICE_MKNODES:
- if (dmi->flags & DM_EXISTS_FLAG)
- add_dev_node(dmt->dev_name, MAJOR(dmi->dev),
- MINOR(dmi->dev));
- else
- rm_dev_node(dmt->dev_name);
- break;
-
- case DM_DEVICE_STATUS:
- case DM_DEVICE_TABLE:
- if (!_unmarshal_status_v1(dmt, dmi))
- goto bad;
- break;
-
- case DM_DEVICE_SUSPEND:
- case DM_DEVICE_RESUME:
- dmt->type = DM_DEVICE_INFO;
- if (!dm_task_run(dmt))
- goto bad;
- free(dmi); /* We'll use what info returned */
- return 1;
- }
-
- dmt->dmi.v1 = dmi;
- return 1;
-
- bad:
- free(dmi);
- return 0;
-}
-
-#endif
-
-/*
- * Protocol Version 4 functions.
- */
-
-int dm_task_get_driver_version(struct dm_task *dmt, char *version, size_t size)
-{
- unsigned int *v;
-
-#ifdef DM_COMPAT
- if (_dm_version == 1)
- return _dm_task_get_driver_version_v1(dmt, version, size);
-#endif
-
- if (!dmt->dmi.v4) {
- version[0] = '\0';
- return 0;
- }
-
- v = dmt->dmi.v4->version;
- snprintf(version, size, "%u.%u.%u", v[0], v[1], v[2]);
- return 1;
-}
-
-static int _check_version(char *version, size_t size, int log_suppress)
-{
- struct dm_task *task;
- int r;
-
- if (!(task = dm_task_create(DM_DEVICE_VERSION))) {
- log_error("Failed to get device-mapper version");
- version[0] = '\0';
- return 0;
- }
-
- if (log_suppress)
- _log_suppress = 1;
-
- r = dm_task_run(task);
- dm_task_get_driver_version(task, version, size);
- dm_task_destroy(task);
- _log_suppress = 0;
-
- return r;
-}
-
-/*
- * Find out device-mapper's major version number the first time
- * this is called and whether or not we support it.
- */
-int dm_check_version(void)
-{
- char libversion[64], dmversion[64];
- const char *compat = "";
-
- if (_version_checked)
- return _version_ok;
-
- _version_checked = 1;
-
- if (_check_version(dmversion, sizeof(dmversion), _dm_compat))
- return 1;
-
- if (!_dm_compat)
- goto bad;
-
- log_verbose("device-mapper ioctl protocol version %d failed. "
- "Trying protocol version 1.", _dm_version);
- _dm_version = 1;
- if (_check_version(dmversion, sizeof(dmversion), 0)) {
- log_verbose("Using device-mapper ioctl protocol version 1");
- return 1;
- }
-
- compat = "(compat)";
-
- dm_get_library_version(libversion, sizeof(libversion));
-
- log_error("Incompatible libdevmapper %s%s and kernel driver %s",
- libversion, compat, dmversion);
-
- bad:
- _version_ok = 0;
- return 0;
-}
-
-void *dm_get_next_target(struct dm_task *dmt, void *next,
- uint64_t *start, uint64_t *length,
- char **target_type, char **params)
-{
- struct target *t = (struct target *) next;
-
- if (!t)
- t = dmt->head;
-
- if (!t)
- return NULL;
-
- *start = t->start;
- *length = t->length;
- *target_type = t->type;
- *params = t->params;
-
- return t->next;
-}
-
-/* Unmarshall the target info returned from a status call */
-static int _unmarshal_status(struct dm_task *dmt, struct dm_ioctl *dmi)
-{
- char *outbuf = (char *) dmi + dmi->data_start;
- char *outptr = outbuf;
- uint32_t i;
- struct dm_target_spec *spec;
-
- for (i = 0; i < dmi->target_count; i++) {
- spec = (struct dm_target_spec *) outptr;
- if (!dm_task_add_target(dmt, spec->sector_start,
- spec->length,
- spec->target_type,
- outptr + sizeof(*spec)))
- return 0;
-
- outptr = outbuf + spec->next;
- }
-
- return 1;
-}
-
-int dm_format_dev(char *buf, int bufsize, uint32_t dev_major,
- uint32_t dev_minor)
-{
- int r;
-
-#ifdef DM_COMPAT
- if (_dm_version == 1)
- return _dm_format_dev_v1(buf, bufsize, dev_major, dev_minor);
-#endif
-
- if (bufsize < 8)
- return 0;
-
- r = snprintf(buf, bufsize, "%03u:%03u", dev_major, dev_minor);
- if (r < 0 || r > bufsize - 1)
- return 0;
-
- return 1;
-}
-
-int dm_task_get_info(struct dm_task *dmt, struct dm_info *info)
-{
-#ifdef DM_COMPAT
- if (_dm_version == 1)
- return _dm_task_get_info_v1(dmt, info);
-#endif
-
- if (!dmt->dmi.v4)
- return 0;
-
- memset(info, 0, sizeof(*info));
-
- info->exists = dmt->dmi.v4->flags & DM_EXISTS_FLAG ? 1 : 0;
- if (!info->exists)
- return 1;
-
- info->suspended = dmt->dmi.v4->flags & DM_SUSPEND_FLAG ? 1 : 0;
- info->read_only = dmt->dmi.v4->flags & DM_READONLY_FLAG ? 1 : 0;
- info->live_table = dmt->dmi.v4->flags & DM_ACTIVE_PRESENT_FLAG ? 1 : 0;
- info->inactive_table = dmt->dmi.v4->flags & DM_INACTIVE_PRESENT_FLAG ?
- 1 : 0;
- info->target_count = dmt->dmi.v4->target_count;
- info->open_count = dmt->dmi.v4->open_count;
- info->event_nr = dmt->dmi.v4->event_nr;
- info->major = MAJOR(dmt->dmi.v4->dev);
- info->minor = MINOR(dmt->dmi.v4->dev);
-
- return 1;
-}
-
-const char *dm_task_get_name(struct dm_task *dmt)
-{
-#ifdef DM_COMPAT
- if (_dm_version == 1)
- return _dm_task_get_name_v1(dmt);
-#endif
-
- return (dmt->dmi.v4->name);
-}
-
-const char *dm_task_get_uuid(struct dm_task *dmt)
-{
-#ifdef DM_COMPAT
- if (_dm_version == 1)
- return _dm_task_get_uuid_v1(dmt);
-#endif
-
- return (dmt->dmi.v4->uuid);
-}
-
-struct dm_deps *dm_task_get_deps(struct dm_task *dmt)
-{
-#ifdef DM_COMPAT
- if (_dm_version == 1)
- return _dm_task_get_deps_v1(dmt);
-#endif
-
- return (struct dm_deps *) (((void *) dmt->dmi.v4) +
- dmt->dmi.v4->data_start);
-}
-
-struct dm_names *dm_task_get_names(struct dm_task *dmt)
-{
-#ifdef DM_COMPAT
- if (_dm_version == 1)
- return _dm_task_get_names_v1(dmt);
-#endif
-
- return (struct dm_names *) (((void *) dmt->dmi.v4) +
- dmt->dmi.v4->data_start);
-}
-
-int dm_task_set_ro(struct dm_task *dmt)
-{
- dmt->read_only = 1;
- return 1;
-}
-
-int dm_task_set_newname(struct dm_task *dmt, const char *newname)
-{
- if (!(dmt->newname = strdup(newname))) {
- log_error("dm_task_set_newname: strdup(%s) failed", newname);
- return 0;
- }
-
- return 1;
-}
-
-int dm_task_set_event_nr(struct dm_task *dmt, uint32_t event_nr)
-{
- dmt->event_nr = event_nr;
-
- return 1;
-}
-
-struct target *create_target(uint64_t start, uint64_t len, const char *type,
- const char *params)
-{
- struct target *t = malloc(sizeof(*t));
-
- if (!t) {
- log_error("create_target: malloc(%d) failed", sizeof(*t));
- return NULL;
- }
-
- memset(t, 0, sizeof(*t));
-
- if (!(t->params = strdup(params))) {
- log_error("create_target: strdup(params) failed");
- goto bad;
- }
-
- if (!(t->type = strdup(type))) {
- log_error("create_target: strdup(type) failed");
- goto bad;
- }
-
- t->start = start;
- t->length = len;
- return t;
-
- bad:
- free(t->params);
- free(t->type);
- free(t);
- return NULL;
-}
-
-static void *_add_target(struct target *t, void *out, void *end)
-{
- void *out_sp = out;
- struct dm_target_spec sp;
- size_t sp_size = sizeof(struct dm_target_spec);
- int len;
- const char no_space[] = "Ran out of memory building ioctl parameter";
-
- out += sp_size;
- if (out >= end) {
- log_error(no_space);
- return NULL;
- }
-
- sp.status = 0;
- sp.sector_start = t->start;
- sp.length = t->length;
- strncpy(sp.target_type, t->type, sizeof(sp.target_type));
-
- len = strlen(t->params);
-
- if ((out + len + 1) >= end) {
- log_error(no_space);
-
- log_error("t->params= '%s'", t->params);
- return NULL;
- }
- strcpy((char *) out, t->params);
- out += len + 1;
-
- /* align next block */
- out = _align(out, ALIGNMENT);
-
- sp.next = out - out_sp;
- memcpy(out_sp, &sp, sp_size);
-
- return out;
-}
-
-static struct dm_ioctl *_flatten(struct dm_task *dmt)
-{
- const size_t min_size = 16 * 1024;
- const int (*version)[3];
-
- struct dm_ioctl *dmi;
- struct target *t;
- size_t len = sizeof(struct dm_ioctl);
- void *b, *e;
- int count = 0;
-
- for (t = dmt->head; t; t = t->next) {
- len += sizeof(struct dm_target_spec);
- len += strlen(t->params) + 1 + ALIGNMENT;
- count++;
- }
-
- if (count && dmt->newname) {
- log_error("targets and newname are incompatible");
- return NULL;
- }
-
- if (dmt->newname)
- len += strlen(dmt->newname) + 1;
-
- /*
- * Give len a minimum size so that we have space to store
- * dependencies or status information.
- */
- if (len < min_size)
- len = min_size;
-
- if (!(dmi = malloc(len)))
- return NULL;
-
- memset(dmi, 0, len);
-
- version = &_cmd_data_v4[dmt->type].version;
-
- dmi->version[0] = (*version)[0];
- dmi->version[1] = (*version)[1];
- dmi->version[2] = (*version)[2];
-
- dmi->data_size = len;
- dmi->data_start = sizeof(struct dm_ioctl);
-
- if (dmt->dev_name)
- strncpy(dmi->name, dmt->dev_name, sizeof(dmi->name));
-
- if (dmt->type == DM_DEVICE_SUSPEND)
- dmi->flags |= DM_SUSPEND_FLAG;
- if (dmt->read_only)
- dmi->flags |= DM_READONLY_FLAG;
-
- if (dmt->minor >= 0) {
- if (dmt->major <= 0) {
- log_error("Missing major number for persistent device");
- return NULL;
- }
- dmi->flags |= DM_PERSISTENT_DEV_FLAG;
- dmi->dev = MKDEV(dmt->major, dmt->minor);
- }
-
- if (dmt->uuid)
- strncpy(dmi->uuid, dmt->uuid, sizeof(dmi->uuid));
-
- dmi->target_count = count;
- dmi->event_nr = dmt->event_nr;
-
- b = (void *) (dmi + 1);
- e = (void *) ((char *) dmi + len);
-
- for (t = dmt->head; t; t = t->next)
- if (!(b = _add_target(t, b, e)))
- goto bad;
-
- if (dmt->newname)
- strcpy(b, dmt->newname);
-
- return dmi;
-
- bad:
- free(dmi);
- return NULL;
-}
-
-static int _create_and_load_v4(struct dm_task *dmt)
-{
- struct dm_task *task;
- int r;
-
- /* Use new task struct to create the device */
- if (!(task = dm_task_create(DM_DEVICE_CREATE))) {
- log_error("Failed to create device-mapper task struct");
- return 0;
- }
-
- /* Copy across relevant fields */
- if (dmt->dev_name && !dm_task_set_name(task, dmt->dev_name)) {
- dm_task_destroy(task);
- return 0;
- }
-
- if (dmt->uuid && !dm_task_set_uuid(task, dmt->uuid)) {
- dm_task_destroy(task);
- return 0;
- }
-
- task->major = dmt->major;
- task->minor = dmt->minor;
-
- r = dm_task_run(task);
- dm_task_destroy(task);
- if (!r)
- return r;
-
- /* Next load the table */
- if (!(task = dm_task_create(DM_DEVICE_RELOAD))) {
- log_error("Failed to create device-mapper task struct");
- return 0;
- }
-
- /* Copy across relevant fields */
- if (dmt->dev_name && !dm_task_set_name(task, dmt->dev_name)) {
- dm_task_destroy(task);
- return 0;
- }
-
- task->read_only = dmt->read_only;
- task->head = dmt->head;
- task->tail = dmt->tail;
-
- r = dm_task_run(task);
-
- task->head = NULL;
- task->tail = NULL;
- dm_task_destroy(task);
- if (!r)
- return r;
-
- /* Use the original structure last so the info will be correct */
- dmt->type = DM_DEVICE_RESUME;
- dmt->uuid = NULL;
- free(dmt->uuid);
-
- r = dm_task_run(dmt);
-
- return r;
-}
-
-int dm_task_run(struct dm_task *dmt)
-{
- struct dm_ioctl *dmi = NULL;
- unsigned int command;
-
-#ifdef DM_COMPAT
- if (_dm_version == 1)
- return _dm_task_run_v1(dmt);
-#endif
-
- if ((unsigned) dmt->type >=
- (sizeof(_cmd_data_v4) / sizeof(*_cmd_data_v4))) {
- log_error("Internal error: unknown device-mapper task %d",
- dmt->type);
- goto bad;
- }
-
- command = _cmd_data_v4[dmt->type].cmd;
-
- /* Old-style creation had a table supplied */
- if (dmt->type == DM_DEVICE_CREATE && dmt->head)
- return _create_and_load_v4(dmt);
-
- if (!_open_control())
- return 0;
-
- dmi = _flatten(dmt);
- if (!dmi) {
- log_error("Couldn't create ioctl argument");
- return 0;
- }
-
- if (dmt->type == DM_DEVICE_TABLE)
- dmi->flags |= DM_STATUS_TABLE_FLAG;
-
- dmi->flags |= DM_EXISTS_FLAG; /* FIXME */
- log_debug("dm %s %s %s %s", _cmd_data_v4[dmt->type].name, dmi->name,
- dmi->uuid, dmt->newname ? dmt->newname : "");
- if (ioctl(_control_fd, command, dmi) < 0) {
- if (errno == ENXIO && ((dmt->type == DM_DEVICE_INFO) ||
- (dmt->type == DM_DEVICE_MKNODES))) {
- dmi->flags &= ~DM_EXISTS_FLAG; /* FIXME */
- goto ignore_error;
- }
- if (_log_suppress)
- log_verbose("device-mapper ioctl cmd %d failed: %s",
- _IOC_NR(command), strerror(errno));
- else
- log_error("device-mapper ioctl cmd %d failed: %s",
- _IOC_NR(command), strerror(errno));
- goto bad;
- }
-
- ignore_error:
- switch (dmt->type) {
- case DM_DEVICE_CREATE:
- add_dev_node(dmt->dev_name, MAJOR(dmi->dev), MINOR(dmi->dev));
- break;
-
- case DM_DEVICE_REMOVE:
- rm_dev_node(dmt->dev_name);
- break;
-
- case DM_DEVICE_RENAME:
- rename_dev_node(dmt->dev_name, dmt->newname);
- break;
-
- case DM_DEVICE_MKNODES:
- if (dmi->flags & DM_EXISTS_FLAG)
- add_dev_node(dmt->dev_name, MAJOR(dmi->dev),
- MINOR(dmi->dev));
- else
- rm_dev_node(dmt->dev_name);
- break;
-
- case DM_DEVICE_STATUS:
- case DM_DEVICE_TABLE:
- case DM_DEVICE_WAITEVENT:
- if (!_unmarshal_status(dmt, dmi))
- goto bad;
- break;
- }
-
- dmt->dmi.v4 = dmi;
- return 1;
-
- bad:
- free(dmi);
- return 0;
-}
-
-void dm_lib_release(void)
-{
- if (_control_fd != -1) {
- close(_control_fd);
- _control_fd = -1;
- }
- update_devs();
-}
-
-void dm_lib_exit(void)
-{
- if (_control_fd != -1) {
- close(_control_fd);
- _control_fd = -1;
- }
- _version_ok = 1;
- _version_checked = 0;
-}
+++ /dev/null
-/*
- * Copyright (C) 2001 Sistina Software (UK) Limited.
- *
- * This file is released under the LGPL.
- */
-
-#ifndef _LINUX_LIBDM_COMPAT_H
-#define _LINUX_LIBDM_COMPAT_H
-
-#include <inttypes.h>
-#include <linux/dm-ioctl.h>
-#include <linux/kdev_t.h>
-#include <sys/ioctl.h>
-
-struct dm_task;
-struct dm_info;
-
-/*
- * Old versions of structures for backwards compatibility.
- */
-
-struct dm_ioctl_v1 {
- uint32_t version[3]; /* in/out */
- uint32_t data_size; /* total size of data passed in
- * including this struct */
-
- uint32_t data_start; /* offset to start of data
- * relative to start of this struct */
-
- int32_t target_count; /* in/out */
- int32_t open_count; /* out */
- uint32_t flags; /* in/out */
-
- __kernel_dev_t dev; /* in/out */
-
- char name[DM_NAME_LEN]; /* device name */
- char uuid[DM_UUID_LEN]; /* unique identifier for
- * the block device */
-};
-
-struct dm_target_spec_v1 {
- int32_t status; /* used when reading from kernel only */
- uint64_t sector_start;
- uint32_t length;
- uint32_t next;
-
- char target_type[DM_MAX_TYPE_NAME];
-
-};
-
-struct dm_target_deps_v1 {
- uint32_t count;
-
- __kernel_dev_t dev[0]; /* out */
-};
-
-enum {
- /* Top level cmds */
- DM_VERSION_CMD_V1 = 0,
- DM_REMOVE_ALL_CMD_V1,
-
- /* device level cmds */
- DM_DEV_CREATE_CMD_V1,
- DM_DEV_REMOVE_CMD_V1,
- DM_DEV_RELOAD_CMD_V1,
- DM_DEV_RENAME_CMD_V1,
- DM_DEV_SUSPEND_CMD_V1,
- DM_DEV_DEPS_CMD_V1,
- DM_DEV_STATUS_CMD_V1,
-
- /* target level cmds */
- DM_TARGET_STATUS_CMD_V1,
- DM_TARGET_WAIT_CMD_V1,
-};
-
-#define DM_VERSION_V1 _IOWR(DM_IOCTL, DM_VERSION_CMD_V1, struct dm_ioctl)
-#define DM_REMOVE_ALL_V1 _IOWR(DM_IOCTL, DM_REMOVE_ALL_CMD_V1, struct dm_ioctl)
-
-#define DM_DEV_CREATE_V1 _IOWR(DM_IOCTL, DM_DEV_CREATE_CMD_V1, struct dm_ioctl)
-#define DM_DEV_REMOVE_V1 _IOWR(DM_IOCTL, DM_DEV_REMOVE_CMD_V1, struct dm_ioctl)
-#define DM_DEV_RELOAD_V1 _IOWR(DM_IOCTL, DM_DEV_RELOAD_CMD_V1, struct dm_ioctl)
-#define DM_DEV_SUSPEND_V1 _IOWR(DM_IOCTL, DM_DEV_SUSPEND_CMD_V1, struct dm_ioctl)
-#define DM_DEV_RENAME_V1 _IOWR(DM_IOCTL, DM_DEV_RENAME_CMD_V1, struct dm_ioctl)
-#define DM_DEV_DEPS_V1 _IOWR(DM_IOCTL, DM_DEV_DEPS_CMD_V1, struct dm_ioctl)
-#define DM_DEV_STATUS_V1 _IOWR(DM_IOCTL, DM_DEV_STATUS_CMD_V1, struct dm_ioctl)
-
-#define DM_TARGET_STATUS_V1 _IOWR(DM_IOCTL, DM_TARGET_STATUS_CMD_V1, struct dm_ioctl)
-#define DM_TARGET_WAIT_V1 _IOWR(DM_IOCTL, DM_TARGET_WAIT_CMD_V1, struct dm_ioctl)
-
-/* *INDENT-OFF* */
-static struct cmd_data _cmd_data_v1[] = {
- { "create", DM_DEV_CREATE_V1, {1, 0, 0} },
- { "reload", DM_DEV_RELOAD_V1, {1, 0, 0} },
- { "remove", DM_DEV_REMOVE_V1, {1, 0, 0} },
- { "remove_all", DM_REMOVE_ALL_V1, {1, 0, 0} },
- { "suspend", DM_DEV_SUSPEND_V1, {1, 0, 0} },
- { "resume", DM_DEV_SUSPEND_V1, {1, 0, 0} },
- { "info", DM_DEV_STATUS_V1, {1, 0, 0} },
- { "deps", DM_DEV_DEPS_V1, {1, 0, 0} },
- { "rename", DM_DEV_RENAME_V1, {1, 0, 0} },
- { "version", DM_VERSION_V1, {1, 0, 0} },
- { "status", DM_TARGET_STATUS_V1, {1, 0, 0} },
- { "table", DM_TARGET_STATUS_V1, {1, 0, 0} },
- { "waitevent", DM_TARGET_WAIT_V1, {1, 0, 0} },
- { "names", 0, {4, 0, 0} },
- { "clear", 0, {4, 0, 0} },
- { "mknodes", 0, {4, 0, 0} },
-};
-/* *INDENT-ON* */
-
-#endif
+++ /dev/null
-/*
- * Copyright (C) 2001 Sistina Software (UK) Limited.
- *
- * This file is released under the LGPL.
- */
-
-#ifndef LIB_DMTARGETS_H
-#define LIB_DMTARGETS_H
-
-#include <inttypes.h>
-
-struct dm_ioctl;
-struct dm_ioctl_v1;
-
-struct target {
- uint64_t start;
- uint64_t length;
- char *type;
- char *params;
-
- struct target *next;
-};
-
-struct dm_task {
- int type;
- char *dev_name;
-
- struct target *head, *tail;
-
- int read_only;
- uint32_t event_nr;
- int major;
- int minor;
- union {
- struct dm_ioctl *v4;
- struct dm_ioctl_v1 *v1;
- } dmi;
- char *newname;
-
- char *uuid;
-};
-
-struct cmd_data {
- const char *name;
- const int cmd;
- const int version[3];
-};
-
-int dm_check_version(void);
-
-#endif
+++ /dev/null
-/*
- * Copyright (C) 2001 Sistina Software (UK) Limited.
- *
- * This file is released under the LGPL.
- */
-
-#ifndef LIB_DEVICE_MAPPER_H
-#define LIB_DEVICE_MAPPER_H
-
-#include <inttypes.h>
-#include <sys/types.h>
-
-#ifdef linux
-# include <linux/types.h>
-#endif
-
-/*
- * Since it is quite laborious to build the ioctl
- * arguments for the device-mapper people are
- * encouraged to use this library.
- *
- * You will need to build a struct dm_task for
- * each ioctl command you want to execute.
- */
-
-typedef void (*dm_log_fn) (int level, const char *file, int line,
- const char *f, ...);
-
-/*
- * The library user may wish to register their own
- * logging function, by default errors go to
- * stderr.
- */
-void dm_log_init(dm_log_fn fn);
-void dm_log_init_verbose(int level);
-
-enum {
- DM_DEVICE_CREATE,
- DM_DEVICE_RELOAD,
- DM_DEVICE_REMOVE,
- DM_DEVICE_REMOVE_ALL,
-
- DM_DEVICE_SUSPEND,
- DM_DEVICE_RESUME,
-
- DM_DEVICE_INFO,
- DM_DEVICE_DEPS,
- DM_DEVICE_RENAME,
-
- DM_DEVICE_VERSION,
-
- DM_DEVICE_STATUS,
- DM_DEVICE_TABLE,
- DM_DEVICE_WAITEVENT,
-
- DM_DEVICE_LIST,
-
- DM_DEVICE_CLEAR,
-
- DM_DEVICE_MKNODES
-};
-
-struct dm_task;
-
-struct dm_task *dm_task_create(int type);
-void dm_task_destroy(struct dm_task *dmt);
-
-int dm_task_set_name(struct dm_task *dmt, const char *name);
-int dm_task_set_uuid(struct dm_task *dmt, const char *uuid);
-
-/*
- * Retrieve attributes after an info.
- */
-struct dm_info {
- int exists;
- int suspended;
- int live_table;
- int inactive_table;
- int32_t open_count;
- uint32_t event_nr;
- uint32_t major;
- uint32_t minor; /* minor device number */
- int read_only; /* 0:read-write; 1:read-only */
-
- int32_t target_count;
-};
-
-struct dm_deps {
- uint32_t count;
- uint32_t filler;
- uint64_t device[0];
-};
-
-struct dm_names {
- uint64_t dev;
- uint32_t next; /* Offset to next struct from start of this struct */
- char name[0];
-};
-
-int dm_get_library_version(char *version, size_t size);
-int dm_task_get_driver_version(struct dm_task *dmt, char *version, size_t size);
-int dm_task_get_info(struct dm_task *dmt, struct dm_info *dmi);
-const char *dm_task_get_name(struct dm_task *dmt);
-const char *dm_task_get_uuid(struct dm_task *dmt);
-
-struct dm_deps *dm_task_get_deps(struct dm_task *dmt);
-struct dm_names *dm_task_get_names(struct dm_task *dmt);
-
-int dm_task_set_ro(struct dm_task *dmt);
-int dm_task_set_newname(struct dm_task *dmt, const char *newname);
-int dm_task_set_minor(struct dm_task *dmt, int minor);
-int dm_task_set_major(struct dm_task *dmt, int major);
-int dm_task_set_event_nr(struct dm_task *dmt, uint32_t event_nr);
-
-/*
- * Use these to prepare for a create or reload.
- */
-int dm_task_add_target(struct dm_task *dmt,
- uint64_t start,
- uint64_t size, const char *ttype, const char *params);
-
-/*
- * Format major/minor numbers correctly for input to driver
- */
-int dm_format_dev(char *buf, int bufsize, uint32_t dev_major, uint32_t dev_minor);
-
-/* Use this to retrive target information returned from a STATUS call */
-void *dm_get_next_target(struct dm_task *dmt,
- void *next, uint64_t *start, uint64_t *length,
- char **target_type, char **params);
-
-/*
- * Call this to actually run the ioctl.
- */
-int dm_task_run(struct dm_task *dmt);
-
-/*
- * Configure the device-mapper directory
- */
-int dm_set_dev_dir(const char *dir);
-const char *dm_dir(void);
-
-/* Release library resources */
-void dm_lib_release(void);
-void dm_lib_exit(void);
-
-#endif /* LIB_DEVICE_MAPPER_H */
+++ /dev/null
-/*
- * Copyright (C) 2001 Sistina Software (UK) Limited.
- *
- * This file is released under the LGPL.
- */
-
-#include "libdm-targets.h"
-#include "libdm-common.h"
-#include "list.h"
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <stdarg.h>
-#include <string.h>
-#include <sys/param.h>
-#include <sys/stat.h>
-#include <unistd.h>
-#include <errno.h>
-#include <linux/dm-ioctl.h>
-#include <linux/kdev_t.h>
-
-#define DEV_DIR "/dev/"
-
-static char _dm_dir[PATH_MAX] = DEV_DIR DM_DIR;
-
-static int _verbose = 0;
-
-/*
- * Library users can provide their own logging
- * function.
- */
-static void _default_log(int level, const char *file, int line,
- const char *f, ...)
-{
- va_list ap;
-
- if (level > _LOG_WARN && !_verbose)
- return;
-
- va_start(ap, f);
-
- if (level < _LOG_WARN)
- vfprintf(stderr, f, ap);
- else
- vprintf(f, ap);
-
- va_end(ap);
-
- if (level < _LOG_WARN)
- fprintf(stderr, "\n");
- else
- fprintf(stdout, "\n");
-}
-
-dm_log_fn _log = _default_log;
-
-void dm_log_init(dm_log_fn fn)
-{
- _log = fn;
-}
-
-void dm_log_init_verbose(int level)
-{
- _verbose = level;
-}
-
-static void _build_dev_path(char *buffer, size_t len, const char *dev_name)
-{
- /* If there's a /, assume caller knows what they're doing */
- if (strchr(dev_name, '/'))
- snprintf(buffer, len, "%s", dev_name);
- else
- snprintf(buffer, len, "%s/%s", _dm_dir, dev_name);
-}
-
-int dm_get_library_version(char *version, size_t size)
-{
- strncpy(version, DM_LIB_VERSION, size);
- return 1;
-}
-
-struct dm_task *dm_task_create(int type)
-{
- struct dm_task *dmt = malloc(sizeof(*dmt));
-
- if (!dm_check_version())
- return NULL;
-
- if (!dmt) {
- log_error("dm_task_create: malloc(%d) failed", sizeof(*dmt));
- return NULL;
- }
-
- memset(dmt, 0, sizeof(*dmt));
-
- dmt->type = type;
- dmt->minor = -1;
- dmt->major = -1;
-
- return dmt;
-}
-
-int dm_task_set_name(struct dm_task *dmt, const char *name)
-{
- char *pos;
- char path[PATH_MAX];
- struct stat st1, st2;
-
- if (dmt->dev_name) {
- free(dmt->dev_name);
- dmt->dev_name = NULL;
- }
-
- /* If path was supplied, remove it if it points to the same device
- * as its last component.
- */
- if ((pos = strrchr(name, '/'))) {
- snprintf(path, sizeof(path), "%s/%s", _dm_dir, pos + 1);
-
- if (stat(name, &st1) || stat(path, &st2) ||
- !(st1.st_dev == st2.st_dev)) {
- log_error("dm_task_set_name: Device %s not found",
- name);
- return 0;
- }
-
- name = pos + 1;
- }
-
- if (!(dmt->dev_name = strdup(name))) {
- log_error("dm_task_set_name: strdup(%s) failed", name);
- return 0;
- }
-
- return 1;
-}
-
-int dm_task_set_uuid(struct dm_task *dmt, const char *uuid)
-{
- if (dmt->uuid) {
- free(dmt->uuid);
- dmt->uuid = NULL;
- }
-
- if (!(dmt->uuid = strdup(uuid))) {
- log_error("dm_task_set_uuid: strdup(%s) failed", uuid);
- return 0;
- }
-
- return 1;
-}
-
-int dm_task_set_major(struct dm_task *dmt, int major)
-{
- dmt->major = major;
- log_debug("Setting major: %d", dmt->major);
-
- return 1;
-}
-
-int dm_task_set_minor(struct dm_task *dmt, int minor)
-{
- dmt->minor = minor;
- log_debug("Setting minor: %d", dmt->minor);
-
- return 1;
-}
-
-int dm_task_add_target(struct dm_task *dmt, uint64_t start, uint64_t size,
- const char *ttype, const char *params)
-{
- struct target *t = create_target(start, size, ttype, params);
-
- if (!t)
- return 0;
-
- if (!dmt->head)
- dmt->head = dmt->tail = t;
- else {
- dmt->tail->next = t;
- dmt->tail = t;
- }
-
- return 1;
-}
-
-static int _add_dev_node(const char *dev_name, uint32_t major, uint32_t minor)
-{
- char path[PATH_MAX];
- struct stat info;
- dev_t dev = MKDEV(major, minor);
-
- _build_dev_path(path, sizeof(path), dev_name);
-
- if (stat(path, &info) >= 0) {
- if (!S_ISBLK(info.st_mode)) {
- log_error("A non-block device file at '%s' "
- "is already present", path);
- return 0;
- }
-
- if (info.st_rdev == dev)
- return 1;
-
- if (unlink(path) < 0) {
- log_error("Unable to unlink device node for '%s'",
- dev_name);
- return 0;
- }
- }
-
- if (mknod(path, S_IFBLK | S_IRUSR | S_IWUSR | S_IRGRP, dev) < 0) {
- log_error("Unable to make device node for '%s'", dev_name);
- return 0;
- }
-
- return 1;
-}
-
-static int _rename_dev_node(const char *old_name, const char *new_name)
-{
- char oldpath[PATH_MAX];
- char newpath[PATH_MAX];
- struct stat info;
-
- _build_dev_path(oldpath, sizeof(oldpath), old_name);
- _build_dev_path(newpath, sizeof(newpath), new_name);
-
- if (stat(newpath, &info) == 0) {
- if (!S_ISBLK(info.st_mode)) {
- log_error("A non-block device file at '%s' "
- "is already present", newpath);
- return 0;
- }
-
- if (unlink(newpath) < 0) {
- if (errno == EPERM) {
- /* devfs, entry has already been renamed */
- return 1;
- }
- log_error("Unable to unlink device node for '%s'",
- new_name);
- return 0;
- }
- }
-
- if (rename(oldpath, newpath) < 0) {
- log_error("Unable to rename device node from '%s' to '%s'",
- old_name, new_name);
- return 0;
- }
-
- return 1;
-}
-
-static int _rm_dev_node(const char *dev_name)
-{
- char path[PATH_MAX];
- struct stat info;
-
- _build_dev_path(path, sizeof(path), dev_name);
-
- if (stat(path, &info) < 0)
- return 1;
-
- if (unlink(path) < 0) {
- log_error("Unable to unlink device node for '%s'", dev_name);
- return 0;
- }
-
- return 1;
-}
-
-typedef enum {
- NODE_ADD,
- NODE_DEL,
- NODE_RENAME
-} node_op_t;
-
-static int _do_node_op(node_op_t type, const char *dev_name, uint32_t major,
- uint32_t minor, const char *old_name)
-{
- switch (type) {
- case NODE_ADD:
- return _add_dev_node(dev_name, major, minor);
- case NODE_DEL:
- return _rm_dev_node(dev_name);
- case NODE_RENAME:
- return _rename_dev_node(old_name, dev_name);
- }
-
- return 1;
-}
-
-static LIST_INIT(_node_ops);
-
-struct node_op_parms {
- struct list list;
- node_op_t type;
- char *dev_name;
- uint32_t major;
- uint32_t minor;
- char *old_name;
- char names[0];
-};
-
-static void _store_str(char **pos, char **ptr, const char *str)
-{
- strcpy(*pos, str);
- *ptr = *pos;
- *pos += strlen(*ptr) + 1;
-}
-
-static int _stack_node_op(node_op_t type, const char *dev_name, uint32_t major,
- uint32_t minor, const char *old_name)
-{
- struct node_op_parms *nop;
- size_t len = strlen(dev_name) + strlen(old_name) + 2;
- char *pos;
-
- if (!(nop = malloc(sizeof(*nop) + len))) {
- log_error("Insufficient memory to stack mknod operation");
- return 0;
- }
-
- pos = nop->names;
- nop->type = type;
- nop->major = major;
- nop->minor = minor;
-
- _store_str(&pos, &nop->dev_name, dev_name);
- _store_str(&pos, &nop->old_name, old_name);
-
- list_add(&_node_ops, &nop->list);
-
- return 1;
-}
-
-static void _pop_node_ops(void)
-{
- struct list *noph, *nopht;
- struct node_op_parms *nop;
-
- list_iterate_safe(noph, nopht, &_node_ops) {
- nop = list_item(noph, struct node_op_parms);
- _do_node_op(nop->type, nop->dev_name, nop->major, nop->minor,
- nop->old_name);
- list_del(&nop->list);
- free(nop);
- }
-}
-
-int add_dev_node(const char *dev_name, uint32_t major, uint32_t minor)
-{
- return _stack_node_op(NODE_ADD, dev_name, major, minor, "");
-}
-
-int rename_dev_node(const char *old_name, const char *new_name)
-{
- return _stack_node_op(NODE_RENAME, new_name, 0, 0, old_name);
-}
-
-int rm_dev_node(const char *dev_name)
-{
- return _stack_node_op(NODE_DEL, dev_name, 0, 0, "");
-}
-
-void update_devs(void)
-{
- _pop_node_ops();
-}
-
-int dm_set_dev_dir(const char *dir)
-{
- snprintf(_dm_dir, sizeof(_dm_dir), "%s%s", dir, DM_DIR);
- return 1;
-}
-
-const char *dm_dir(void)
-{
- return _dm_dir;
-}
+++ /dev/null
-/*
- * Copyright (C) 2001 Sistina Software (UK) Limited.
- *
- * This file is released under the LGPL.
- */
-
-#ifndef LIB_DMCOMMON_H
-#define LIB_DMCOMMON_H
-
-#include "libdevmapper.h"
-
-#define _LOG_DEBUG 7
-#define _LOG_INFO 6
-#define _LOG_NOTICE 5
-#define _LOG_WARN 4
-#define _LOG_ERR 3
-#define _LOG_FATAL 2
-
-extern dm_log_fn _log;
-
-#define log_error(msg, x...) _log(_LOG_ERR, __FILE__, __LINE__, msg, ## x)
-#define log_print(msg, x...) _log(_LOG_WARN, __FILE__, __LINE__, msg, ## x)
-#define log_verbose(msg, x...) _log(_LOG_NOTICE, __FILE__, __LINE__, msg, ## x)
-#define log_very_verbose(msg, x...) _log(_LOG_INFO, __FILE__, __LINE__, msg, ## x)
-#define log_debug(msg, x...) _log(_LOG_DEBUG, __FILE__, __LINE__, msg, ## x)
-
-struct target *create_target(uint64_t start,
- uint64_t len,
- const char *type, const char *params);
-
-int add_dev_node(const char *dev_name, uint32_t minor, uint32_t major);
-int rm_dev_node(const char *dev_name);
-int rename_dev_node(const char *old_name, const char *new_name);
-void update_devs(void);
-
-#define DM_LIB_VERSION "1.00.07-ioctl (2003-11-21)"
-
-#endif
+++ /dev/null
-/*
- * Copyright (C) 2001 Sistina Software
- *
- * This file is released under the LGPL.
- */
-
-#ifndef _LVM_LIST_H
-#define _LVM_LIST_H
-
-#include <assert.h>
-
-struct list {
- struct list *n, *p;
-};
-
-#define LIST_INIT(name) struct list name = { &(name), &(name) }
-
-static inline void list_init(struct list *head)
-{
- head->n = head->p = head;
-}
-
-static inline void list_add(struct list *head, struct list *elem)
-{
- assert(head->n);
-
- elem->n = head;
- elem->p = head->p;
-
- head->p->n = elem;
- head->p = elem;
-}
-
-static inline void list_add_h(struct list *head, struct list *elem)
-{
- assert(head->n);
-
- elem->n = head->n;
- elem->p = head;
-
- head->n->p = elem;
- head->n = elem;
-}
-
-static inline void list_del(struct list *elem)
-{
- elem->n->p = elem->p;
- elem->p->n = elem->n;
-}
-
-static inline int list_empty(struct list *head)
-{
- return head->n == head;
-}
-
-static inline int list_end(struct list *head, struct list *elem)
-{
- return elem->n == head;
-}
-
-static inline struct list *list_next(struct list *head, struct list *elem)
-{
- return (list_end(head, elem) ? NULL : elem->n);
-}
-
-#define list_iterate(v, head) \
- for (v = (head)->n; v != head; v = v->n)
-
-#define list_uniterate(v, head, start) \
- for (v = (start)->p; v != head; v = v->p)
-
-#define list_iterate_safe(v, t, head) \
- for (v = (head)->n, t = v->n; v != head; v = t, t = v->n)
-
-static inline unsigned int list_size(const struct list *head)
-{
- unsigned int s = 0;
- const struct list *v;
-
- list_iterate(v, head)
- s++;
-
- return s;
-}
-
-#define list_item(v, t) \
- ((t *)((uintptr_t)(v) - (uintptr_t)&((t *) 0)->list))
-
-#define list_struct_base(v, t, h) \
- ((t *)((uintptr_t)(v) - (uintptr_t)&((t *) 0)->h))
-
-/* Given a known element in a known structure, locate another */
-#define struct_field(v, t, e, f) \
- (((t *)((uintptr_t)(v) - (uintptr_t)&((t *) 0)->e))->f)
-
-/* Given a known element in a known structure, locate the list head */
-#define list_head(v, t, e) struct_field(v, t, e, list)
-
-#endif
+++ /dev/null
-/*
- * Soft: multipath device mapper target autoconfig
- *
- * Version: $Id: main.h,v 0.0.1 2003/09/18 15:13:38 cvaroqui Exp $
- *
- * Author: Copyright (C) 2003 Christophe Varoqui
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
- * See the GNU General Public License for more details.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <linux/kdev_t.h>
-#include <string.h>
-#include <sys/ioctl.h>
-#include <sysfs/libsysfs.h>
-#include "libdevmapper/libdevmapper.h"
-#include "main.h"
-#include "devinfo.h"
-
-/* White list switch */
-static int
-get_unique_id(struct path * mypath)
-{
- int i;
- static struct {
- char * vendor;
- char * product;
- int iopolicy;
- int (*getuid) (char *, char *);
- } wlist[] = {
- {"COMPAQ ", "HSV110 (C)COMPAQ", GROUP_BY_SERIAL, &get_evpd_wwid},
- {"COMPAQ ", "MSA1000 ", GROUP_BY_SERIAL, &get_evpd_wwid},
- {"COMPAQ ", "MSA1000 VOLUME ", GROUP_BY_SERIAL, &get_evpd_wwid},
- {"DEC ", "HSG80 ", GROUP_BY_SERIAL, &get_evpd_wwid},
- {"HP ", "HSV100 ", GROUP_BY_SERIAL, &get_evpd_wwid},
- {"HP ", "A6189A ", MULTIBUS, &get_evpd_wwid},
- {"HP ", "OPEN- ", MULTIBUS, &get_evpd_wwid},
- {"DDN ", "SAN DataDirector", MULTIBUS, &get_evpd_wwid},
- {"FSC ", "CentricStor ", MULTIBUS, &get_evpd_wwid},
- {"HITACHI ", "DF400 ", MULTIBUS, &get_evpd_wwid},
- {"HITACHI ", "DF500 ", MULTIBUS, &get_evpd_wwid},
- {"HITACHI ", "DF600 ", MULTIBUS, &get_evpd_wwid},
- {"IBM ", "ProFibre 4000R ", MULTIBUS, &get_evpd_wwid},
- {"SGI ", "TP9100 ", MULTIBUS, &get_evpd_wwid},
- {"SGI ", "TP9300 ", MULTIBUS, &get_evpd_wwid},
- {"SGI ", "TP9400 ", MULTIBUS, &get_evpd_wwid},
- {"SGI ", "TP9500 ", MULTIBUS, &get_evpd_wwid},
- {NULL, NULL, 0, NULL},
- };
-
- for (i = 0; wlist[i].vendor; i++) {
- if (strncmp(mypath->vendor_id, wlist[i].vendor, 8) == 0 &&
- strncmp(mypath->product_id, wlist[i].product, 16) == 0) {
- mypath->iopolicy = wlist[i].iopolicy;
- if (!wlist[i].getuid(mypath->sg_dev, mypath->wwid))
- return 0;
- }
- }
- return 1;
-}
-
-static int
-blacklist (char * dev) {
- int i;
- static struct {
- char * headstr;
- int lengh;
- } blist[] = {
- {"cciss", 5},
- {"hd", 2},
- {"md", 2},
- {"dm", 2},
- {"sr", 2},
- {"scd", 3},
- {"ram", 3},
- {"raw", 3},
- {NULL, 0},
- };
-
- for (i = 0; blist[i].lengh; i++) {
- if (strncmp(dev, blist[i].headstr, blist[i].lengh) == 0)
- return 1;
- }
- return 0;
-}
-
-static int
-get_all_paths_sysfs(struct env * conf, struct path * all_paths)
-{
- int k=0;
- struct sysfs_directory * sdir;
- struct sysfs_directory * devp;
- struct sysfs_link * linkp;
- char refwwid[WWID_SIZE];
- char empty_buff[WWID_SIZE];
- char buff[FILE_NAME_SIZE];
- char path[FILE_NAME_SIZE];
- struct path curpath;
-
- /* if called from hotplug, only consider the paths that relate */
- /* to the device pointed by conf.hotplugdev */
- memset(empty_buff, 0, WWID_SIZE);
- memset(refwwid, 0, WWID_SIZE);
- if (strncmp("/devices", conf->hotplugdev, 8) == 0) {
- sprintf(buff, "%s%s/block",
- conf->sysfs_path, conf->hotplugdev);
- memset(conf->hotplugdev, 0, FILE_NAME_SIZE);
-
- /* if called from hotplug but with no block, leave */
- if (0 > readlink(buff, conf->hotplugdev, FILE_NAME_SIZE))
- return 0;
-
- basename(conf->hotplugdev, buff);
- sprintf(curpath.sg_dev, "/dev/%s", buff);
-
- get_lun_strings(curpath.vendor_id,
- curpath.product_id,
- curpath.rev,
- curpath.sg_dev);
- get_serial(curpath.serial, curpath.sg_dev);
- if (!get_unique_id(&curpath))
- return 0;
- strcpy(refwwid, curpath.wwid);
- memset(&curpath, 0, sizeof(path));
- }
-
- sprintf(path, "%s/block", conf->sysfs_path);
- sdir = sysfs_open_directory(path);
- sysfs_read_directory(sdir);
-
- dlist_for_each_data(sdir->subdirs, devp, struct sysfs_directory) {
- if (blacklist(devp->name))
- continue;
-
- sysfs_read_directory(devp);
-
- if(devp->links == NULL)
- continue;
-
- dlist_for_each_data(devp->links, linkp, struct sysfs_link) {
- if (!strncmp(linkp->name, "device", 6))
- break;
- }
-
- if (linkp == NULL) {
- continue;
- }
-
- basename(devp->path, buff);
- sprintf(curpath.sg_dev, "/dev/%s", buff);
-
- get_lun_strings(curpath.vendor_id,
- curpath.product_id,
- curpath.rev,
- curpath.sg_dev);
- get_serial(curpath.serial, curpath.sg_dev);
- if(!get_unique_id(&curpath)) {
- memset(&curpath, 0, sizeof(path));
- continue;
- }
-
- if (memcmp(empty_buff, refwwid, WWID_SIZE) != 0 &&
- strncmp(curpath.wwid, refwwid, WWID_SIZE) != 0) {
- memset(&curpath, 0, sizeof(path));
- continue;
- }
-
- strcpy(all_paths[k].sg_dev, curpath.sg_dev);
- strcpy(all_paths[k].dev, curpath.sg_dev);
- strcpy(all_paths[k].wwid, curpath.wwid);
- strcpy(all_paths[k].vendor_id, curpath.vendor_id);
- strcpy(all_paths[k].product_id, curpath.product_id);
- all_paths[k].iopolicy = curpath.iopolicy;
-
- /* done with curpath, zero for reuse */
- memset(&curpath, 0, sizeof(path));
-
- basename(linkp->target, buff);
- sscanf(buff, "%i:%i:%i:%i",
- &all_paths[k].sg_id.host_no,
- &all_paths[k].sg_id.channel,
- &all_paths[k].sg_id.scsi_id,
- &all_paths[k].sg_id.lun);
- k++;
- }
- sysfs_close_directory(sdir);
- return 0;
-}
-
-static int
-get_all_paths_nosysfs(struct env * conf, struct path * all_paths,
- struct scsi_dev * all_scsi_ids)
-{
- int k, i, fd;
- char buff[FILE_NAME_SIZE];
- char file_name[FILE_NAME_SIZE];
-
- for (k = 0; k < conf->max_devs; k++) {
- strcpy(file_name, "/dev/sg");
- sprintf(buff, "%d", k);
- strncat(file_name, buff, FILE_NAME_SIZE);
- strcpy(all_paths[k].sg_dev, file_name);
-
- get_lun_strings(all_paths[k].vendor_id,
- all_paths[k].product_id,
- all_paths[k].rev,
- all_paths[k].sg_dev);
- get_serial(all_paths[k].serial, all_paths[k].sg_dev);
- if (!get_unique_id(&all_paths[k]))
- continue;
-
- if ((fd = open(all_paths[k].sg_dev, O_RDONLY)) < 0)
- return 0;
-
- if (0 > ioctl(fd, SG_GET_SCSI_ID, &(all_paths[k].sg_id)))
- printf("device %s failed on sg ioctl, skip\n",
- file_name);
-
- close(fd);
-
- for (i = 0; i < conf->max_devs; i++) {
- if ((all_paths[k].sg_id.host_no ==
- all_scsi_ids[i].host_no)
- && (all_paths[k].sg_id.scsi_id ==
- (all_scsi_ids[i].scsi_id.dev_id & 0xff))
- && (all_paths[k].sg_id.lun ==
- ((all_scsi_ids[i].scsi_id.dev_id >> 8) & 0xff))
- && (all_paths[k].sg_id.channel ==
- ((all_scsi_ids[i].scsi_id.
- dev_id >> 16) & 0xff))) {
- strcpy(all_paths[k].dev, all_scsi_ids[i].dev);
- break;
- }
- }
- }
- return 0;
-}
-
-static int
-get_all_scsi_ids(struct env * conf, struct scsi_dev * all_scsi_ids)
-{
- int k, big, little, res, host_no, fd;
- char buff[64];
- char fname[FILE_NAME_SIZE];
- struct scsi_idlun my_scsi_id;
-
- for (k = 0; k < conf->max_devs; k++) {
- strcpy(fname, "/dev/sd");
- if (k < 26) {
- buff[0] = 'a' + (char) k;
- buff[1] = '\0';
- strcat(fname, buff);
- } else if (k <= 255) {
- /* assumes sequence goes x,y,z,aa,ab,ac etc */
- big = k / 26;
- little = k - (26 * big);
- big = big - 1;
-
- buff[0] = 'a' + (char) big;
- buff[1] = 'a' + (char) little;
- buff[2] = '\0';
- strcat(fname, buff);
- } else
- strcat(fname, "xxxx");
-
- if ((fd = open(fname, O_RDONLY)) < 0) {
- if (conf->verbose)
- fprintf(stderr, "can't open %s. mknod ?",
- fname);
- continue;
- }
-
- res = ioctl(fd, SCSI_IOCTL_GET_IDLUN, &my_scsi_id);
- if (res < 0) {
- close(fd);
- printf("Could not get scsi idlun\n");
- continue;
- }
-
- res = ioctl(fd, SCSI_IOCTL_GET_BUS_NUMBER, &host_no);
- if (res < 0) {
- close(fd);
- printf("Could not get host_no\n");
- continue;
- }
-
- close(fd);
-
- strcpy(all_scsi_ids[k].dev, fname);
- all_scsi_ids[k].scsi_id = my_scsi_id;
- all_scsi_ids[k].host_no = host_no;
- }
- return 0;
-}
-
-/* print_path style */
-#define ALL 0
-#define NOWWID 1
-
-static void
-print_path(struct path * all_paths, int k, int style)
-{
- if (style != NOWWID)
- printf("%s ", all_paths[k].wwid);
- else
- printf(" \\_");
- printf("(%i %i %i %i) ",
- all_paths[k].sg_id.host_no,
- all_paths[k].sg_id.channel,
- all_paths[k].sg_id.scsi_id, all_paths[k].sg_id.lun);
- if(0 != strcmp(all_paths[k].sg_dev, all_paths[k].dev))
- printf("%s ", all_paths[k].sg_dev);
- printf("%s ", all_paths[k].dev);
- printf("[%.16s]\n", all_paths[k].product_id);
-}
-
-static void
-print_all_path(struct env * conf, struct path * all_paths)
-{
- int k;
- char empty_buff[WWID_SIZE];
-
- memset(empty_buff, 0, WWID_SIZE);
- for (k = 0; k < conf->max_devs; k++) {
- if (memcmp(empty_buff, all_paths[k].wwid, WWID_SIZE) == 0)
- continue;
- print_path(all_paths, k, ALL);
- }
-}
-
-static void
-print_all_mp(struct path * all_paths, struct multipath * mp, int nmp)
-{
- int k, i;
-
- for (k = 0; k <= nmp; k++) {
- printf("%s\n", mp[k].wwid);
- for (i = 0; i <= mp[k].npaths; i++)
- print_path(all_paths, PINDEX(k,i), NOWWID);
- }
-}
-
-static int
-coalesce_paths(struct env * conf, struct multipath * mp,
- struct path * all_paths)
-{
- int k, i, nmp, np, already_done;
- char empty_buff[WWID_SIZE];
-
- nmp = -1;
- already_done = 0;
- memset(empty_buff, 0, WWID_SIZE);
-
- for (k = 0; k < conf->max_devs - 1; k++) {
- /* skip this path for some reason */
-
- /* 1. if path has no unique id */
- if (memcmp(empty_buff, all_paths[k].wwid, WWID_SIZE) == 0)
- continue;
-
- /* 2. if mp with this uid already instanciated */
- for (i = 0; i <= nmp; i++) {
- if (0 == strcmp(mp[i].wwid, all_paths[k].wwid))
- already_done = 1;
- }
- if (already_done) {
- already_done = 0;
- continue;
- }
-
- /* at this point, we know we really got a new mp */
- np = 0;
- nmp++;
- strcpy(mp[nmp].wwid, all_paths[k].wwid);
- PINDEX(nmp,np) = k;
-
- if (mp[nmp].size == 0)
- mp[nmp].size = get_disk_size(all_paths[k].dev);
-
- for (i = k + 1; i < conf->max_devs; i++) {
- if (0 == strcmp(all_paths[k].wwid, all_paths[i].wwid)) {
- np++;
- PINDEX(nmp,np) = i;
- mp[nmp].npaths = np;
- }
- }
- }
- return nmp;
-}
-
-static void
-group_by_serial(struct multipath * mp, struct path * all_paths, char * str) {
- int path_count, pg_count = 0;
- int i, k;
- int * bitmap;
- char path_buff[FILE_NAME_SIZE];
- char pg_buff[FILE_NAME_SIZE];
- char * path_buff_p = &path_buff[0];
- char * pg_buff_p = &pg_buff[0];
-
- /* init the bitmap */
- bitmap = malloc((mp->npaths + 1) * sizeof(int));
- memset(bitmap, 0, (mp->npaths + 1) * sizeof(int));
-
- for (i = 0; i <= mp->npaths; i++) {
- if (bitmap[i])
- continue;
-
- /* here, we really got a new pg */
- pg_count++;
- path_count = 1;
- memset(&path_buff, 0, FILE_NAME_SIZE * sizeof(char));
- path_buff_p = &path_buff[0];
-
- path_buff_p += sprintf(path_buff_p, " %s", all_paths[mp->pindex[i]].dev);
- bitmap[i] = 1;
-
- for (k = i + 1; k <= mp->npaths; k++) {
- if (bitmap[k])
- continue;
- if (0 == strcmp(all_paths[mp->pindex[i]].serial,
- all_paths[mp->pindex[k]].serial)) {
- path_buff_p += sprintf(path_buff_p, " %s", all_paths[mp->pindex[k]].dev);
- bitmap[k] = 1;
- path_count++;
- }
- }
- pg_buff_p += sprintf(pg_buff_p, " 1 round-robin %i 0%s",
- path_count, path_buff);
- }
- sprintf(str, " %i%s", pg_count, pg_buff);
- free(bitmap);
-}
-
-static int
-dm_simplecmd(int task, const char *name) {
- int r = 0;
- struct dm_task *dmt;
-
- if (!(dmt = dm_task_create(task)))
- return 0;
-
- if (!dm_task_set_name(dmt, name))
- goto out;
-
- r = dm_task_run(dmt);
-
- out:
- dm_task_destroy(dmt);
- return r;
-}
-
-static int
-dm_addmap(int task, const char *name, const char *params, long size) {
- struct dm_task *dmt;
-
- if (!(dmt = dm_task_create(task)))
- return 0;
-
- if (!dm_task_set_name(dmt, name))
- goto addout;
-
- if (!dm_task_add_target(dmt, 0, size, DM_TARGET, params))
- goto addout;
-
- if (!dm_task_run(dmt))
- goto addout;
-
- addout:
- dm_task_destroy(dmt);
- return 1;
-}
-
-static int
-setup_map(struct env * conf, struct path * all_paths,
- struct multipath * mp, int index, int op)
-{
- char params[255];
- char * params_p;
- int i, np;
-
- /* defaults for multipath target */
- int dm_pg_prio = 1;
- char * dm_ps_name = "round-robin";
- int dm_ps_nr_args = 0;
-
- params_p = ¶ms[0];
-
- np = 0;
- for (i=0; i<=mp[index].npaths; i++) {
- if (0 == all_paths[PINDEX(index,i)].sg_id.scsi_type)
- np++;
- }
-
- if (np < 1)
- return 0;
-
- if ((all_paths[PINDEX(index,0)].iopolicy == MULTIBUS &&
- conf->iopolicy == -1) || conf->iopolicy == MULTIBUS) {
- params_p += sprintf(params_p, " 1 %i %s %i %i",
- dm_pg_prio, dm_ps_name, np, dm_ps_nr_args);
-
- for (i=0; i<=mp[index].npaths; i++) {
- if (0 != all_paths[PINDEX(index,i)].sg_id.scsi_type)
- continue;
- params_p += sprintf(params_p, " %s",
- all_paths[PINDEX(index,i)].dev);
- }
- }
-
- if ((all_paths[PINDEX(index,0)].iopolicy == FAILOVER &&
- conf->iopolicy == -1) || conf->iopolicy == FAILOVER) {
- params_p += sprintf(params_p, " %i", mp[index].npaths + 1);
- for (i=0; i<=mp[index].npaths; i++) {
- if (0 != all_paths[PINDEX(index,i)].sg_id.scsi_type)
- continue;
- params_p += sprintf(params_p, " %i %s ",
- dm_pg_prio, dm_ps_name);
- params_p += sprintf(params_p, "1 %i",
- dm_ps_nr_args);
- params_p += sprintf(params_p, " %s",
- all_paths[PINDEX(index,i)].dev);
- }
- }
-
- if ((all_paths[PINDEX(index,0)].iopolicy == GROUP_BY_SERIAL &&
- conf->iopolicy == -1) || conf->iopolicy == GROUP_BY_SERIAL) {
- group_by_serial(&mp[index], all_paths, params_p);
- }
-
- if (mp[index].size < 0)
- return 0;
-
- if (!conf->quiet) {
- if (op == DM_DEVICE_RELOAD)
- printf("U:");
- if (op == DM_DEVICE_CREATE)
- printf("N:");
- printf("%s:0 %li %s %s\n",
- mp[index].wwid, mp[index].size, DM_TARGET, params);
- }
-
- if (op == DM_DEVICE_RELOAD)
- dm_simplecmd(DM_DEVICE_SUSPEND, mp[index].wwid);
-
- dm_addmap(op, mp[index].wwid, params, mp[index].size);
-
- if (op == DM_DEVICE_RELOAD)
- dm_simplecmd(DM_DEVICE_RESUME, mp[index].wwid);
-
- return 1;
-}
-
-static int
-map_present(char * str)
-{
- int r = 0;
- struct dm_task *dmt;
- struct dm_names *names;
- unsigned next = 0;
-
- if (!(dmt = dm_task_create(DM_DEVICE_LIST)))
- return 0;
-
- if (!dm_task_run(dmt))
- goto out;
-
- if (!(names = dm_task_get_names(dmt)))
- goto out;
-
- if (!names->dev) {
- goto out;
- }
-
- do {
- if (0 == strcmp(names->name, str))
- r = 1;
- next = names->next;
- names = (void *) names + next;
- } while (next);
-
- out:
- dm_task_destroy(dmt);
- return r;
-}
-
-static void
-usage(char * progname)
-{
- fprintf(stderr, VERSION_STRING);
- fprintf(stderr, "Usage: %s [-v|-q] [-d] [-m max_devs]",
- progname);
- fprintf(stderr, "[-p failover|multibus|group_by_serial] [device]\n");
- fprintf(stderr, "\t-v\t\tverbose, print all paths and multipaths\n");
- fprintf(stderr, "\t-q\t\tquiet, no output at all\n");
- fprintf(stderr, "\t-d\t\tdry run, do not create or update devmaps\n");
- fprintf(stderr, "\t-m max_devs\tscan {max_devs} devices at most\n");
- fprintf(stderr, "\t-p policy\tforce maps to specified policy :\n");
- fprintf(stderr, "\t failover\t\t- 1 path per priority group\n");
- fprintf(stderr, "\t multibus\t\t- all paths in 1 priority group\n");
- fprintf(stderr, "\t group_by_serial\t- 1 priority group per serial\n");
- fprintf(stderr, "\tdevice\t\tlimit scope to the device's multipath\n");
- fprintf(stderr, "\t\t\t(hotplug-style $DEVPATH reference)\n");
- exit(1);
-}
-
-int
-main(int argc, char *argv[])
-{
- struct multipath * mp;
- struct path * all_paths;
- struct scsi_dev * all_scsi_ids;
- struct env conf;
- int i, k, nmp;
-
- /* Default behaviour */
- conf.max_devs = MAX_DEVS;
- conf.dry_run = 0; /* 1 == Do not Create/Update devmaps */
- conf.verbose = 0; /* 1 == Print all_paths and mp */
- conf.quiet = 0; /* 1 == Do not even print devmaps */
- conf.iopolicy = -1; /* Apply the defaults in get_unique_id() */
-
- for (i = 1; i < argc; ++i) {
- if (0 == strcmp("-v", argv[i])) {
- if (conf.quiet == 1)
- usage(argv[0]);
- conf.verbose = 1;
- } else if (0 == strcmp("-m", argv[i])) {
- conf.max_devs = atoi(argv[++i]);
- if (conf.max_devs < 2)
- usage(argv[0]);
- } else if (0 == strcmp("-q", argv[i])) {
- if (conf.verbose == 1)
- usage(argv[0]);
- conf.quiet = 1;
- } else if (0 == strcmp("-d", argv[i]))
- conf.dry_run = 1;
- else if (0 == strcmp("-p", argv[i])) {
- i++;
- if (!strcmp(argv[i], "failover"))
- conf.iopolicy = FAILOVER;
- if (!strcmp(argv[i], "multibus"))
- conf.iopolicy = MULTIBUS;
- if (!strcmp(argv[i], "group_by_serial"))
- conf.iopolicy = GROUP_BY_SERIAL;
- } else if (*argv[i] == '-') {
- fprintf(stderr, "Unknown switch: %s\n", argv[i]);
- usage(argv[0]);
- } else
- strncpy(conf.hotplugdev, argv[i], FILE_NAME_SIZE);
- }
-
- /* dynamic allocations */
- mp = malloc(conf.max_devs * sizeof(struct multipath));
- all_paths = malloc(conf.max_devs * sizeof(struct path));
- all_scsi_ids = malloc(conf.max_devs * sizeof(struct scsi_dev));
- if (mp == NULL || all_paths == NULL || all_scsi_ids == NULL)
- exit(1);
-
- if (sysfs_get_mnt_path(conf.sysfs_path, FILE_NAME_SIZE)) {
- get_all_scsi_ids(&conf, all_scsi_ids);
- get_all_paths_nosysfs(&conf, all_paths, all_scsi_ids);
- } else {
- get_all_paths_sysfs(&conf, all_paths);
- }
- nmp = coalesce_paths(&conf, mp, all_paths);
-
- if (conf.verbose) {
- print_all_path(&conf, all_paths);
- fprintf(stdout, "\n");
- print_all_mp(all_paths, mp, nmp);
- fprintf(stdout, "\n");
- }
-
- if (conf.dry_run)
- exit(0);
-
- for (k=0; k<=nmp; k++) {
- if (map_present(mp[k].wwid)) {
- setup_map(&conf, all_paths, mp, k, DM_DEVICE_RELOAD);
- } else {
- setup_map(&conf, all_paths, mp, k, DM_DEVICE_CREATE);
- }
- }
-
- /* free allocs */
- free(mp);
- free(all_paths);
- free(all_scsi_ids);
-
- exit(0);
-}
+++ /dev/null
-/*
- * Soft: Description here...
- *
- * Version: $Id: main.h,v 0.0.1 2003/09/18 15:13:38 cvaroqui Exp $
- *
- * Author: Copyright (C) 2003 Christophe Varoqui
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
- * See the GNU General Public License for more details.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
-
-#ifndef _MAIN_H
-#define _MAIN_H
-
-/* local includes */
-#include "sg_include.h"
-
-/* exerpt from "sg_err.h" */
-#define SCSI_CHECK_CONDITION 0x2
-#define SCSI_COMMAND_TERMINATED 0x22
-#define SG_ERR_DRIVER_SENSE 0x08
-
-/* exerpt from "scsi.h" */
-#define SCSI_IOCTL_GET_IDLUN 0x5382
-#define SCSI_IOCTL_GET_BUS_NUMBER 0x5386
-
-/* global defs */
-#define WWID_SIZE 33
-#define SERIAL_SIZE 14
-#define MAX_DEVS 128
-#define MAX_MP MAX_DEVS / 2
-#define MAX_MP_PATHS MAX_DEVS / 4
-#define FILE_NAME_SIZE 256
-#define DEF_TIMEOUT 60000
-#define EBUFF_SZ 256
-#define TUR_CMD_LEN 6
-#define DM_TARGET "multipath"
-
-/* Storage controlers cpabilities */
-#define FAILOVER 0
-#define MULTIBUS 1
-#define GROUP_BY_SERIAL 2
-
-#define PINDEX(x,y) mp[(x)].pindex[(y)]
-
-/* global types */
-struct scsi_idlun {
- int dev_id;
- int host_unique_id;
- int host_no;
-};
-
-struct sg_id {
- int host_no;
- int channel;
- int scsi_id;
- int lun;
- int scsi_type;
- short h_cmd_per_lun;
- short d_queue_depth;
- int unused1;
- int unused2;
-};
-
-struct scsi_dev {
- char dev[FILE_NAME_SIZE];
- struct scsi_idlun scsi_id;
- int host_no;
-};
-
-struct path {
- char dev[FILE_NAME_SIZE];
- char sg_dev[FILE_NAME_SIZE];
- struct scsi_idlun scsi_id;
- struct sg_id sg_id;
- char wwid[WWID_SIZE];
- char vendor_id[8];
- char product_id[16];
- char rev[4];
- char serial[SERIAL_SIZE];
- int iopolicy;
-};
-
-struct multipath {
- char wwid[WWID_SIZE];
- int npaths;
- long size;
- int pindex[MAX_MP_PATHS];
-};
-
-struct env {
- int max_devs;
- int verbose;
- int quiet;
- int dry_run;
- int iopolicy;
- int with_sysfs;
- char sysfs_path[FILE_NAME_SIZE];
- char hotplugdev[FILE_NAME_SIZE];
-};
-
-/* Build version */
-#define PROG "multipath"
-
-#define VERSION_CODE 0x000012
-#define DATE_CODE 0x021504
-
-#define MULTIPATH_VERSION(version) \
- (version >> 16) & 0xFF, \
- (version >> 8) & 0xFF, \
- version & 0xFF
-
-#define VERSION_STRING PROG" v%d.%d.%d (%.2d/%.2d, 20%.2d)\n", \
- MULTIPATH_VERSION(VERSION_CODE), \
- MULTIPATH_VERSION(DATE_CODE)
-
-#endif
+++ /dev/null
-.TH MULTIPATH 8 "February 2004" "" "Linux Administrator's Manual"
-.SH NAME
-multipath \- Device mapper target autoconfig
-.SH SYNOPSIS
-.B multipath
-.RB [\| \-v | \-q \|]
-.RB [\| \-d \|]
-.RB [\| \-m\ \c
-.IR max_devs \|]
-.RB [\| \-p\ \c
-.BR failover | multibus | group_by_serial \|]
-.RB [\| device \|]
-.SH DESCRIPTION
-.B multipath
-is used to detect multiple paths to devices for fail-over or performance reasons and coalesces them.
-.SH OPTIONS
-.TP
-.B \-v
-verbose, print all paths and multipaths
-.TP
-.B \-q
-quiet, no output at all
-.TP
-.B \-d
-dry run, do not create or update devmaps
-.TP
-.BI \-m " max_devs"
-scan
-.I max_devs
-devices at most
-.TP
-.BI \-p " policy"
-force maps to specified policy:
-.RS 1.2i
-.TP 1.2i
-.B failover
-1 path per priority group
-.TP
-.B multibus
-all paths in 1 priority group
-.TP
-.B group_by_serial
-1 priority group per serial
-.RE
-.TP
-.B device
-limit the [re]configuration to the specified device's multipath scope. device is given in its hotplug $DEVPATH form like /devices/pci0000:03/0000:03:01.0/host0/0:0:5:1
-.SH "SEE ALSO"
-.BR udev (8),
-.BR dmsetup (8)
-.SH AUTHORS
-.B multipath
-was developed by Christophe Varoqui, <christophe.varoqui@free.fr> and others.
+++ /dev/null
-#!bin/sh
-. /etc/hotplug/hotplug.functions
-
-# wait for sysfs
-sleep 1
-
-mesg `/sbin/multipath $DEVPATH`
+++ /dev/null
-#ifndef SG_ERR_H
-#define SG_ERR_H
-
-/* Feel free to copy and modify this GPL-ed code into your applications. */
-
-/* Version 0.90 (20030519)
-*/
-
-
-/* Some of the following error/status codes are exchanged between the
- various layers of the SCSI sub-system in Linux and should never
- reach the user. They are placed here for completeness. What appears
- here is copied from drivers/scsi/scsi.h which is not visible in
- the user space. */
-
-#ifndef SCSI_CHECK_CONDITION
-/* Following are the "true" SCSI status codes. Linux has traditionally
- used a 1 bit right and masked version of these. So now CHECK_CONDITION
- and friends (in <scsi/scsi.h>) are deprecated. */
-#define SCSI_CHECK_CONDITION 0x2
-#define SCSI_CONDITION_MET 0x4
-#define SCSI_BUSY 0x8
-#define SCSI_IMMEDIATE 0x10
-#define SCSI_IMMEDIATE_CONDITION_MET 0x14
-#define SCSI_RESERVATION_CONFLICT 0x18
-#define SCSI_COMMAND_TERMINATED 0x22
-#define SCSI_TASK_SET_FULL 0x28
-#define SCSI_ACA_ACTIVE 0x30
-#define SCSI_TASK_ABORTED 0x40
-#endif
-
-/* The following are 'host_status' codes */
-#ifndef DID_OK
-#define DID_OK 0x00
-#endif
-#ifndef DID_NO_CONNECT
-#define DID_NO_CONNECT 0x01 /* Unable to connect before timeout */
-#define DID_BUS_BUSY 0x02 /* Bus remain busy until timeout */
-#define DID_TIME_OUT 0x03 /* Timed out for some other reason */
-#define DID_BAD_TARGET 0x04 /* Bad target (id?) */
-#define DID_ABORT 0x05 /* Told to abort for some other reason */
-#define DID_PARITY 0x06 /* Parity error (on SCSI bus) */
-#define DID_ERROR 0x07 /* Internal error */
-#define DID_RESET 0x08 /* Reset by somebody */
-#define DID_BAD_INTR 0x09 /* Received an unexpected interrupt */
-#define DID_PASSTHROUGH 0x0a /* Force command past mid-level */
-#define DID_SOFT_ERROR 0x0b /* The low-level driver wants a retry */
-#endif
-
-/* These defines are to isolate applictaions from kernel define changes */
-#define SG_ERR_DID_OK DID_OK
-#define SG_ERR_DID_NO_CONNECT DID_NO_CONNECT
-#define SG_ERR_DID_BUS_BUSY DID_BUS_BUSY
-#define SG_ERR_DID_TIME_OUT DID_TIME_OUT
-#define SG_ERR_DID_BAD_TARGET DID_BAD_TARGET
-#define SG_ERR_DID_ABORT DID_ABORT
-#define SG_ERR_DID_PARITY DID_PARITY
-#define SG_ERR_DID_ERROR DID_ERROR
-#define SG_ERR_DID_RESET DID_RESET
-#define SG_ERR_DID_BAD_INTR DID_BAD_INTR
-#define SG_ERR_DID_PASSTHROUGH DID_PASSTHROUGH
-#define SG_ERR_DID_SOFT_ERROR DID_SOFT_ERROR
-
-/* The following are 'driver_status' codes */
-#ifndef DRIVER_OK
-#define DRIVER_OK 0x00
-#endif
-#ifndef DRIVER_BUSY
-#define DRIVER_BUSY 0x01
-#define DRIVER_SOFT 0x02
-#define DRIVER_MEDIA 0x03
-#define DRIVER_ERROR 0x04
-#define DRIVER_INVALID 0x05
-#define DRIVER_TIMEOUT 0x06
-#define DRIVER_HARD 0x07
-#define DRIVER_SENSE 0x08 /* Sense_buffer has been set */
-
-/* Following "suggests" are "or-ed" with one of previous 8 entries */
-#define SUGGEST_RETRY 0x10
-#define SUGGEST_ABORT 0x20
-#define SUGGEST_REMAP 0x30
-#define SUGGEST_DIE 0x40
-#define SUGGEST_SENSE 0x80
-#define SUGGEST_IS_OK 0xff
-#endif
-#ifndef DRIVER_MASK
-#define DRIVER_MASK 0x0f
-#endif
-#ifndef SUGGEST_MASK
-#define SUGGEST_MASK 0xf0
-#endif
-
-/* These defines are to isolate applictaions from kernel define changes */
-#define SG_ERR_DRIVER_OK DRIVER_OK
-#define SG_ERR_DRIVER_BUSY DRIVER_BUSY
-#define SG_ERR_DRIVER_SOFT DRIVER_SOFT
-#define SG_ERR_DRIVER_MEDIA DRIVER_MEDIA
-#define SG_ERR_DRIVER_ERROR DRIVER_ERROR
-#define SG_ERR_DRIVER_INVALID DRIVER_INVALID
-#define SG_ERR_DRIVER_TIMEOUT DRIVER_TIMEOUT
-#define SG_ERR_DRIVER_HARD DRIVER_HARD
-#define SG_ERR_DRIVER_SENSE DRIVER_SENSE
-#define SG_ERR_SUGGEST_RETRY SUGGEST_RETRY
-#define SG_ERR_SUGGEST_ABORT SUGGEST_ABORT
-#define SG_ERR_SUGGEST_REMAP SUGGEST_REMAP
-#define SG_ERR_SUGGEST_DIE SUGGEST_DIE
-#define SG_ERR_SUGGEST_SENSE SUGGEST_SENSE
-#define SG_ERR_SUGGEST_IS_OK SUGGEST_IS_OK
-#define SG_ERR_DRIVER_MASK DRIVER_MASK
-#define SG_ERR_SUGGEST_MASK SUGGEST_MASK
-
-
-
-/* The following "print" functions send ACSII to stdout */
-extern void sg_print_command(const unsigned char * command);
-extern void sg_print_sense(const char * leadin,
- const unsigned char * sense_buffer, int sb_len);
-extern void sg_print_status(int masked_status);
-extern void sg_print_scsi_status(int scsi_status);
-extern void sg_print_host_status(int host_status);
-extern void sg_print_driver_status(int driver_status);
-
-/* sg_chk_n_print() returns 1 quietly if there are no errors/warnings
- else it prints to standard output and returns 0. */
-extern int sg_chk_n_print(const char * leadin, int masked_status,
- int host_status, int driver_status,
- const unsigned char * sense_buffer, int sb_len);
-
-/* The following function declaration is for the sg version 3 driver.
- Only version 3 sg_err.c defines it. */
-struct sg_io_hdr;
-extern int sg_chk_n_print3(const char * leadin, struct sg_io_hdr * hp);
-
-
-/* The following "category" function returns one of the following */
-#define SG_ERR_CAT_CLEAN 0 /* No errors or other information */
-#define SG_ERR_CAT_MEDIA_CHANGED 1 /* interpreted from sense buffer */
-#define SG_ERR_CAT_RESET 2 /* interpreted from sense buffer */
-#define SG_ERR_CAT_TIMEOUT 3
-#define SG_ERR_CAT_RECOVERED 4 /* Successful command after recovered err */
-#define SG_ERR_CAT_SENSE 98 /* Something else is in the sense buffer */
-#define SG_ERR_CAT_OTHER 99 /* Some other error/warning has occurred */
-
-extern int sg_err_category(int masked_status, int host_status,
- int driver_status, const unsigned char * sense_buffer,
- int sb_len);
-
-extern int sg_err_category_new(int scsi_status, int host_status,
- int driver_status, const unsigned char * sense_buffer,
- int sb_len);
-
-/* The following function declaration is for the sg version 3 driver.
- Only version 3 sg_err.c defines it. */
-extern int sg_err_category3(struct sg_io_hdr * hp);
-
-/* Returns length of SCSI command given the opcode (first byte) */
-extern int sg_get_command_size(unsigned char opcode);
-
-extern void sg_get_command_name(unsigned char opcode, int buff_len,
- char * buff);
-
-#endif
+++ /dev/null
-#ifdef SG_KERNEL_INCLUDES
- #define __user
- typedef unsigned char u8;
- #include "/usr/src/linux/include/scsi/sg.h"
- #include "/usr/src/linux/include/scsi/scsi.h"
-#else
- #ifdef SG_TRICK_GNU_INCLUDES
- #include <linux/../scsi/sg.h>
- #include <linux/../scsi/scsi.h>
- #else
- #include <scsi/sg.h>
- #endif
-#endif
-
-/*
- Getting the correct include files for the sg interface can be an ordeal.
- In a perfect world, one would just write:
- #include <scsi/sg.h>
- #include <scsi/scsi.h>
- This would include the files found in the /usr/include/scsi directory.
- Those files are maintained with the GNU library which may or may not
- agree with the kernel and version of sg driver that is running. Any
- many cases this will not matter. However in some it might, for example
- glibc 2.1's include files match the sg driver found in the lk 2.2
- series. Hence if glibc 2.1 is used with lk 2.4 then the additional
- sg v3 interface will not be visible.
- If this is a problem then defining SG_KERNEL_INCLUDES will access the
- kernel supplied header files (assuming they are in the normal place).
- The GNU library maintainers and various kernel people don't like
- this approach (but it does work).
- The technique selected by defining SG_TRICK_GNU_INCLUDES worked (and
- was used) prior to glibc 2.2 . Prior to that version /usr/include/linux
- was a symbolic link to /usr/src/linux/include/linux .
-
- There are other approaches if this include "mixup" causes pain. These
- would involve include files being copied or symbolic links being
- introduced.
-
- Sorry about the inconvenience. Typically neither SG_KERNEL_INCLUDES
- nor SG_TRICK_GNU_INCLUDES is defined.
-
- dpg 20010415, 20030522
-*/
+++ /dev/null
-static int
-get_serial (int fd, char * str)
-{
- char buff[MX_ALLOC_LEN + 1];
- int len;
-
- if (0 == do_inq(fd, 0, 1, 0x80, buff, MX_ALLOC_LEN, 0)) {
- len = buff[3];
- if (len > 0) {
- memcpy(str, buff + 4, len);
- buff[len] = '\0';
- }
- return 1;
- }
- return 0;
-}
-
-static int
-do_tur(int fd)
-{
- unsigned char turCmdBlk[TUR_CMD_LEN] = { 0x00, 0, 0, 0, 0, 0 };
- struct sg_io_hdr io_hdr;
- unsigned char sense_buffer[32];
-
- memset(&io_hdr, 0, sizeof (struct sg_io_hdr));
- io_hdr.interface_id = 'S';
- io_hdr.cmd_len = sizeof (turCmdBlk);
- io_hdr.mx_sb_len = sizeof (sense_buffer);
- io_hdr.dxfer_direction = SG_DXFER_NONE;
- io_hdr.cmdp = turCmdBlk;
- io_hdr.sbp = sense_buffer;
- io_hdr.timeout = 20000;
- io_hdr.pack_id = 0;
- if (ioctl(fd, SG_IO, &io_hdr) < 0) {
- close(fd);
- return 0;
- }
- if (io_hdr.info & SG_INFO_OK_MASK) {
- return 0;
- }
- return 1;
-}
-
-static int
-del_map(char * str) {
- struct dm_task *dmt;
-
- if (!(dmt = dm_task_create(DM_DEVICE_REMOVE)))
- return 0;
- if (!dm_task_set_name(dmt, str))
- goto delout;
- if (!dm_task_run(dmt))
- goto delout;
-
- printf("Deleted device map : %s\n", str);
-
- delout:
- dm_task_destroy(dmt);
- return 1;
-}
-
-get_table(const char * str)
-{
- int r = 0;
- struct dm_task *dmt;
- void *next = NULL;
- uint64_t start, length;
- char *target_type = NULL;
- char *params;
-
- if (!(dmt = dm_task_create(DM_DEVICE_TABLE)))
- return 0;
-
- if (!dm_task_set_name(dmt, str))
- goto out;
-
- if (!dm_task_run(dmt))
- goto out;
-
- do {
- next = dm_get_next_target(dmt, next, &start, &length,
- &target_type, ¶ms);
- if (target_type) {
- printf("%" PRIu64 " %" PRIu64 " %s %s\n",
- start, length, target_type, params);
- }
- } while (next);
-
- r = 1;
-
- out:
- dm_task_destroy(dmt);
- return r;
-
-}
~ianmdlvl / elogind.git / commitdiff