diff options
Diffstat (limited to 'extras/multipath/libdevmapper/ioctl/libdevmapper.c')
| -rw-r--r-- | extras/multipath/libdevmapper/ioctl/libdevmapper.c | 1092 |
1 files changed, 0 insertions, 1092 deletions
diff --git a/extras/multipath/libdevmapper/ioctl/libdevmapper.c b/extras/multipath/libdevmapper/ioctl/libdevmapper.c deleted file mode 100644 index ac7ba0c86a..0000000000 --- a/extras/multipath/libdevmapper/ioctl/libdevmapper.c +++ /dev/null @@ -1,1092 +0,0 @@ -/* - * 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; -} |