X-Git-Url: https://git.ozlabs.org/?p=petitboot;a=blobdiff_plain;f=discover%2Fplatform-powerpc.c;h=24cc521c12c98c40f57c2fbec42400ee71f6f556;hp=b0a35a7dfff4ea9a886513de2260658ea8cf42a6;hb=a5dad9c05cd72820e64e0461889e9e77eaf8202d;hpb=a984595cfb4910ba6f464c69c316f1613f10f894 diff --git a/discover/platform-powerpc.c b/discover/platform-powerpc.c index b0a35a7..24cc521 100644 --- a/discover/platform-powerpc.c +++ b/discover/platform-powerpc.c @@ -1,9 +1,12 @@ +#include #include #include #include +#include #include #include +#include #include #include @@ -14,6 +17,7 @@ #include "platform.h" static const char *partition = "common"; +static const char *sysparams_dir = "/sys/firmware/opal/sysparams/"; struct param { char *name; @@ -30,6 +34,7 @@ static const char *known_params[] = { "auto-boot?", "petitboot,network", "petitboot,timeout", + "petitboot,bootdev", NULL, }; @@ -340,8 +345,8 @@ static int parse_one_dns_config(struct config *config, static void populate_network_config(struct platform_powerpc *platform, struct config *config) { + char *val, *saveptr = NULL; const char *cval; - char *val; int i; cval = get_param(platform, "petitboot,network"); @@ -351,7 +356,7 @@ static void populate_network_config(struct platform_powerpc *platform, val = talloc_strdup(config, cval); for (i = 0; ; i++) { - char *tok, *saveptr; + char *tok; tok = strtok_r(i == 0 ? val : NULL, " ", &saveptr); if (!tok) @@ -367,6 +372,32 @@ static void populate_network_config(struct platform_powerpc *platform, talloc_free(val); } +static void populate_bootdev_config(struct platform_powerpc *platform, + struct config *config) + +{ + const char *val; + + config->boot_device = NULL; + + val = get_param(platform, "petitboot,bootdev"); + if (!val || !strlen(val)) + return; + + if (!strncmp(val, "uuid:", strlen("uuid:"))) { + config->boot_device = talloc_strdup(config, + val + strlen("uuid:")); + + } else if (!strncmp(val, "mac:", strlen("mac:"))) { + config->boot_device = talloc_strdup(config, + val + strlen("mac:")); + + } else { + pb_log("bootdev config is in an unknown format " + "(expected uuid:... or mac:...)"); + } +} + static void populate_config(struct platform_powerpc *platform, struct config *config) { @@ -390,6 +421,8 @@ static void populate_config(struct platform_powerpc *platform, } populate_network_config(platform, config); + + populate_bootdev_config(platform, config); } static char *iface_config_str(void *ctx, struct interface_config *config) @@ -477,6 +510,21 @@ static void update_network_config(struct platform_powerpc *platform, talloc_free(val); } +static void update_bootdev_config(struct platform_powerpc *platform, + struct config *config) +{ + char *val, *tmp = NULL; + + if (!config->boot_device) + val = ""; + else + tmp = val = talloc_asprintf(platform, + "uuid:%s", config->boot_device); + + update_string_config(platform, "petitboot,bootdev", val); + talloc_free(tmp); +} + static int update_config(struct platform_powerpc *platform, struct config *config, struct config *defaults) { @@ -501,9 +549,164 @@ static int update_config(struct platform_powerpc *platform, update_network_config(platform, config); + update_bootdev_config(platform, config); + return write_nvram(platform); } +static void set_exclusive_devtype(struct config *config, + enum device_type devtype) +{ + config->n_boot_priorities = 2; + config->boot_priorities = talloc_realloc(config, + config->boot_priorities, struct boot_priority, + config->n_boot_priorities); + config->boot_priorities[0].type = devtype; + config->boot_priorities[0].priority = 0; + config->boot_priorities[1].type = DEVICE_TYPE_ANY; + config->boot_priorities[1].priority = -1; +} + +/* bootdev options that we recognise */ +enum ipmi_bootdev { + IPMI_BOOTDEV_NONE = 0x00, + IPMI_BOOTDEV_NETWORK = 0x01, + IPMI_BOOTDEV_DISK = 0x2, + IPMI_BOOTDEV_SAFE = 0x3, + IPMI_BOOTDEV_CDROM = 0x5, + IPMI_BOOTDEV_SETUP = 0x6, +}; + +static int read_bootdev_sysparam(const char *name, uint8_t *val) +{ + uint8_t buf[2]; + char path[50]; + int fd, rc; + + strcpy(path, sysparams_dir); + assert(strlen(name) < sizeof(path) - strlen(path)); + strcat(path, name); + + fd = open(path, O_RDONLY); + if (fd < 0) { + pb_debug("powerpc: can't access sysparam %s\n", + name); + return -1; + } + + rc = read(fd, buf, sizeof(buf)); + + close(fd); + + /* bootdev definitions should only be one byte in size */ + if (rc != 1) { + pb_debug("powerpc: sysparam %s read returned %d\n", + name, rc); + return -1; + } + + pb_debug("powerpc: sysparam %s: 0x%02x\n", name, buf[0]); + + switch (buf[0]) { + default: + return -1; + case IPMI_BOOTDEV_NONE: + case IPMI_BOOTDEV_NETWORK: + case IPMI_BOOTDEV_DISK: + case IPMI_BOOTDEV_SAFE: + case IPMI_BOOTDEV_CDROM: + case IPMI_BOOTDEV_SETUP: + *val = buf[0]; + } + + return 0; +} + +static int write_bootdev_sysparam(const char *name, uint8_t val) +{ + char path[50]; + int fd, rc; + + strcpy(path, sysparams_dir); + assert(strlen(name) < sizeof(path) - strlen(path)); + strcat(path, name); + + fd = open(path, O_WRONLY); + if (fd < 0) { + pb_debug("powerpc: can't access sysparam %s for writing\n", + name); + return -1; + } + + for (;;) { + errno = 0; + rc = write(fd, &val, sizeof(val)); + if (rc == sizeof(val)) { + rc = 0; + break; + } + + if (rc <= 0 && errno != EINTR) { + pb_log("powerpc: error updating sysparam %s: %s", + name, strerror(errno)); + rc = -1; + break; + } + } + + close(fd); + + if (!rc) + pb_debug("powerpc: set sysparam %s: 0x%02x\n", name, val); + + return rc; +} + +static void parse_opal_sysparams(struct config *config) +{ + uint8_t next_bootdev, default_bootdev; + bool next_valid, default_valid; + int rc; + + rc = read_bootdev_sysparam("next-boot-device", &next_bootdev); + next_valid = rc == 0; + + rc = read_bootdev_sysparam("default-boot-device", &default_bootdev); + default_valid = rc == 0; + + /* nothing valid? no need to change the config */ + if (!next_valid && !default_valid) + return; + + if (next_valid) { + /* invalidate next-boot-device setting */ + write_bootdev_sysparam("next-boot-device", 0xff); + } else { + next_bootdev = default_bootdev; + } + + switch (next_bootdev) { + case IPMI_BOOTDEV_NONE: + return; + case IPMI_BOOTDEV_DISK: + set_exclusive_devtype(config, DEVICE_TYPE_DISK); + break; + case IPMI_BOOTDEV_NETWORK: + set_exclusive_devtype(config, DEVICE_TYPE_NETWORK); + break; + case IPMI_BOOTDEV_CDROM: + set_exclusive_devtype(config, DEVICE_TYPE_OPTICAL); + break; + case IPMI_BOOTDEV_SETUP: + config->autoboot_enabled = false; + break; + case IPMI_BOOTDEV_SAFE: + config->autoboot_enabled = false; + config->safe_mode = true; + break; + } +} + static int load_config(struct platform *p, struct config *config) { struct platform_powerpc *platform = to_platform_powerpc(p); @@ -515,6 +718,8 @@ static int load_config(struct platform *p, struct config *config) populate_config(platform, config); + parse_opal_sysparams(config); + return 0; } @@ -539,7 +744,7 @@ static bool probe(struct platform *p, void *ctx) struct stat statbuf; int rc; - /* we need a device tree and a working nvram binary */ + /* we need a device tree */ rc = stat("/proc/device-tree", &statbuf); if (rc) return false; @@ -547,10 +752,6 @@ static bool probe(struct platform *p, void *ctx) if (!S_ISDIR(statbuf.st_mode)) return false; - rc = process_run_simple(ctx, "nvram", "--print-config", NULL); - if (!WIFEXITED(rc) || WEXITSTATUS(rc) != 0) - return false; - platform = talloc(ctx, struct platform_powerpc); list_init(&platform->params);