diff options
Diffstat (limited to 'cmds-device.c')
| -rw-r--r-- | cmds-device.c | 411 |
1 files changed, 411 insertions, 0 deletions
diff --git a/cmds-device.c b/cmds-device.c new file mode 100644 index 0000000..41e79d3 --- /dev/null +++ b/cmds-device.c @@ -0,0 +1,411 @@ +/* + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public + * License v2 as published by the Free Software Foundation. + * + * 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. + * + * You should have received a copy of the GNU General Public + * License along with this program; if not, write to the + * Free Software Foundation, Inc., 59 Temple Place - Suite 330, + * Boston, MA 021110-1307, USA. + */ + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> +#include <fcntl.h> +#include <sys/ioctl.h> +#include <errno.h> +#include <sys/stat.h> + +#include "kerncompat.h" +#include "ctree.h" +#include "ioctl.h" +#include "utils.h" + +#include "commands.h" + +/* FIXME - imported cruft, fix sparse errors and warnings */ +#ifdef __CHECKER__ +#define BLKGETSIZE64 0 +#define BTRFS_IOC_SNAP_CREATE_V2 0 +#define BTRFS_VOL_NAME_MAX 255 +struct btrfs_ioctl_vol_args { char name[BTRFS_VOL_NAME_MAX]; }; +static inline int ioctl(int fd, int define, void *arg) { return 0; } +#endif + +static const char * const device_cmd_group_usage[] = { + "btrfs device <command> [<args>]", + NULL +}; + +static const char * const cmd_add_dev_usage[] = { + "btrfs device add <device> [<device>...] <path>", + "Add a device to a filesystem", + NULL +}; + +static int cmd_add_dev(int argc, char **argv) +{ + char *mntpnt; + int i, fdmnt, ret=0, e; + + if (check_argc_min(argc, 3)) + usage(cmd_add_dev_usage); + + mntpnt = argv[argc - 1]; + + fdmnt = open_file_or_dir(mntpnt); + if (fdmnt < 0) { + fprintf(stderr, "ERROR: can't access to '%s'\n", mntpnt); + return 12; + } + + for (i = 1; i < argc - 1; i++ ){ + struct btrfs_ioctl_vol_args ioctl_args; + int devfd, res; + u64 dev_block_count = 0; + struct stat st; + int mixed = 0; + + res = check_mounted(argv[i]); + if (res < 0) { + fprintf(stderr, "error checking %s mount status\n", + argv[i]); + ret++; + continue; + } + if (res == 1) { + fprintf(stderr, "%s is mounted\n", argv[i]); + ret++; + continue; + } + + devfd = open(argv[i], O_RDWR); + if (devfd < 0) { + fprintf(stderr, "ERROR: Unable to open device '%s'\n", argv[i]); + ret++; + continue; + } + res = fstat(devfd, &st); + if (res) { + fprintf(stderr, "ERROR: Unable to stat '%s'\n", argv[i]); + close(devfd); + ret++; + continue; + } + if (!S_ISBLK(st.st_mode)) { + fprintf(stderr, "ERROR: '%s' is not a block device\n", argv[i]); + close(devfd); + ret++; + continue; + } + + res = btrfs_prepare_device(devfd, argv[i], 1, &dev_block_count, + 0, &mixed, 0); + if (res) { + fprintf(stderr, "ERROR: Unable to init '%s'\n", argv[i]); + close(devfd); + ret++; + continue; + } + close(devfd); + + strncpy_null(ioctl_args.name, argv[i]); + res = ioctl(fdmnt, BTRFS_IOC_ADD_DEV, &ioctl_args); + e = errno; + if(res<0){ + fprintf(stderr, "ERROR: error adding the device '%s' - %s\n", + argv[i], strerror(e)); + ret++; + } + + } + + close(fdmnt); + if (ret) + return ret+20; + else + return 0; +} + +static const char * const cmd_rm_dev_usage[] = { + "btrfs device delete <device> [<device>...] <path>", + "Remove a device from a filesystem", + NULL +}; + +static int cmd_rm_dev(int argc, char **argv) +{ + char *mntpnt; + int i, fdmnt, ret=0, e; + + if (check_argc_min(argc, 3)) + usage(cmd_rm_dev_usage); + + mntpnt = argv[argc - 1]; + + fdmnt = open_file_or_dir(mntpnt); + if (fdmnt < 0) { + fprintf(stderr, "ERROR: can't access to '%s'\n", mntpnt); + return 12; + } + + for(i=1 ; i < argc - 1; i++ ){ + struct btrfs_ioctl_vol_args arg; + int res; + + strncpy_null(arg.name, argv[i]); + res = ioctl(fdmnt, BTRFS_IOC_RM_DEV, &arg); + e = errno; + if(res<0){ + fprintf(stderr, "ERROR: error removing the device '%s' - %s\n", + argv[i], strerror(e)); + ret++; + } + } + + close(fdmnt); + if( ret) + return ret+20; + else + return 0; +} + +static const char * const cmd_scan_dev_usage[] = { + "btrfs device scan [<device>...]", + "Scan devices for a btrfs filesystem", + NULL +}; + +static int cmd_scan_dev(int argc, char **argv) +{ + int i, fd, e; + int checklist = 1; + int devstart = 1; + + if( argc > 1 && !strcmp(argv[1],"--all-devices")){ + if (check_argc_max(argc, 2)) + usage(cmd_scan_dev_usage); + + checklist = 0; + devstart += 1; + } + + if(argc<=devstart){ + + int ret; + + printf("Scanning for Btrfs filesystems\n"); + if(checklist) + ret = btrfs_scan_block_devices(1); + else + ret = btrfs_scan_one_dir("/dev", 1); + if (ret){ + fprintf(stderr, "ERROR: error %d while scanning\n", ret); + return 18; + } + return 0; + } + + fd = open("/dev/btrfs-control", O_RDWR); + if (fd < 0) { + perror("failed to open /dev/btrfs-control"); + return 10; + } + + for( i = devstart ; i < argc ; i++ ){ + struct btrfs_ioctl_vol_args args; + int ret; + + printf("Scanning for Btrfs filesystems in '%s'\n", argv[i]); + + strncpy_null(args.name, argv[i]); + /* + * FIXME: which are the error code returned by this ioctl ? + * it seems that is impossible to understand if there no is + * a btrfs filesystem from an I/O error !!! + */ + ret = ioctl(fd, BTRFS_IOC_SCAN_DEV, &args); + e = errno; + + if( ret < 0 ){ + close(fd); + fprintf(stderr, "ERROR: unable to scan the device '%s' - %s\n", + argv[i], strerror(e)); + return 11; + } + } + + close(fd); + return 0; +} + +static const char * const cmd_ready_dev_usage[] = { + "btrfs device ready <device>", + "Check device to see if it has all of it's devices in cache for mounting", + NULL +}; + +static int cmd_ready_dev(int argc, char **argv) +{ + struct btrfs_ioctl_vol_args args; + int fd; + int ret; + + if (check_argc_min(argc, 2)) + usage(cmd_ready_dev_usage); + + fd = open("/dev/btrfs-control", O_RDWR); + if (fd < 0) { + perror("failed to open /dev/btrfs-control"); + return 10; + } + + strncpy(args.name, argv[argc - 1], BTRFS_PATH_NAME_MAX); + ret = ioctl(fd, BTRFS_IOC_DEVICES_READY, &args); + if (ret < 0) { + fprintf(stderr, "ERROR: unable to determine if the device '%s'" + " is ready for mounting - %s\n", argv[argc - 1], + strerror(errno)); + ret = 1; + } + + close(fd); + return ret; +} + +static const char * const cmd_dev_stats_usage[] = { + "btrfs device stats [-z] <path>|<device>", + "Show current device IO stats. -z to reset stats afterwards.", + NULL +}; + +static int cmd_dev_stats(int argc, char **argv) +{ + char *path; + struct btrfs_ioctl_fs_info_args fi_args; + struct btrfs_ioctl_dev_info_args *di_args = NULL; + int ret; + int fdmnt; + int i; + char c; + int err = 0; + __u64 flags = 0; + + optind = 1; + while ((c = getopt(argc, argv, "z")) != -1) { + switch (c) { + case 'z': + flags = BTRFS_DEV_STATS_RESET; + break; + case '?': + default: + fprintf(stderr, "ERROR: device stat args invalid.\n" + " device stat [-z] <path>|<device>\n" + " -z to reset stats after reading.\n"); + return 1; + } + } + + if (optind + 1 != argc) { + fprintf(stderr, "ERROR: device stat needs path|device as single" + " argument\n"); + return 1; + } + + path = argv[optind]; + + fdmnt = open_path_or_dev_mnt(path); + + if (fdmnt < 0) { + fprintf(stderr, "ERROR: can't access '%s'\n", path); + return 12; + } + + ret = get_fs_info(path, &fi_args, &di_args); + if (ret) { + fprintf(stderr, "ERROR: getting dev info for devstats failed: " + "%s\n", strerror(-ret)); + err = 1; + goto out; + } + if (!fi_args.num_devices) { + fprintf(stderr, "ERROR: no devices found\n"); + err = 1; + goto out; + } + + for (i = 0; i < fi_args.num_devices; i++) { + struct btrfs_ioctl_get_dev_stats args = {0}; + __u8 path[BTRFS_DEVICE_PATH_NAME_MAX + 1]; + + strncpy((char *)path, (char *)di_args[i].path, + BTRFS_DEVICE_PATH_NAME_MAX); + path[BTRFS_DEVICE_PATH_NAME_MAX] = '\0'; + + args.devid = di_args[i].devid; + args.nr_items = BTRFS_DEV_STAT_VALUES_MAX; + args.flags = flags; + + if (ioctl(fdmnt, BTRFS_IOC_GET_DEV_STATS, &args) < 0) { + fprintf(stderr, + "ERROR: ioctl(BTRFS_IOC_GET_DEV_STATS) on %s failed: %s\n", + path, strerror(errno)); + err = 1; + } else { + if (args.nr_items >= BTRFS_DEV_STAT_WRITE_ERRS + 1) + printf("[%s].write_io_errs %llu\n", + path, + (unsigned long long) args.values[ + BTRFS_DEV_STAT_WRITE_ERRS]); + if (args.nr_items >= BTRFS_DEV_STAT_READ_ERRS + 1) + printf("[%s].read_io_errs %llu\n", + path, + (unsigned long long) args.values[ + BTRFS_DEV_STAT_READ_ERRS]); + if (args.nr_items >= BTRFS_DEV_STAT_FLUSH_ERRS + 1) + printf("[%s].flush_io_errs %llu\n", + path, + (unsigned long long) args.values[ + BTRFS_DEV_STAT_FLUSH_ERRS]); + if (args.nr_items >= BTRFS_DEV_STAT_CORRUPTION_ERRS + 1) + printf("[%s].corruption_errs %llu\n", + path, + (unsigned long long) args.values[ + BTRFS_DEV_STAT_CORRUPTION_ERRS]); + if (args.nr_items >= BTRFS_DEV_STAT_GENERATION_ERRS + 1) + printf("[%s].generation_errs %llu\n", + path, + (unsigned long long) args.values[ + BTRFS_DEV_STAT_GENERATION_ERRS]); + } + } + +out: + free(di_args); + close(fdmnt); + + return err; +} + +const struct cmd_group device_cmd_group = { + device_cmd_group_usage, NULL, { + { "add", cmd_add_dev, cmd_add_dev_usage, NULL, 0 }, + { "delete", cmd_rm_dev, cmd_rm_dev_usage, NULL, 0 }, + { "scan", cmd_scan_dev, cmd_scan_dev_usage, NULL, 0 }, + { "ready", cmd_ready_dev, cmd_ready_dev_usage, NULL, 0 }, + { "stats", cmd_dev_stats, cmd_dev_stats_usage, NULL, 0 }, + { 0, 0, 0, 0, 0 } + } +}; + +int cmd_device(int argc, char **argv) +{ + return handle_command_group(&device_cmd_group, argc, argv); +} |