/* vi: set sw=4 ts=4: */ /* * util.c --- helper functions used by tune2fs and mke2fs * * Copyright 1995, 1996, 1997, 1998, 1999, 2000 by Theodore Ts'o. * * Licensed under GPLv2, see file LICENSE in this source tree. */ #include <stdio.h> #include <string.h> #include <errno.h> #include <linux/major.h> #include <sys/stat.h> #include "e2fsbb.h" #include "e2p/e2p.h" #include "ext2fs/ext2_fs.h" #include "ext2fs/ext2fs.h" #include "blkid/blkid.h" #include "util.h" void proceed_question(void) { fputs("Proceed anyway? (y,n) ", stdout); if (bb_ask_confirmation() == 0) exit(1); } void check_plausibility(const char *device, int force) { int val; struct stat s; val = stat(device, &s); if (force) return; if (val == -1) bb_perror_msg_and_die("can't stat '%s'", device); if (!S_ISBLK(s.st_mode)) { printf("%s is not a block special device.\n", device); proceed_question(); return; } #ifdef HAVE_LINUX_MAJOR_H #ifndef MAJOR #define MAJOR(dev) ((dev)>>8) #define MINOR(dev) ((dev) & 0xff) #endif #ifndef SCSI_BLK_MAJOR #ifdef SCSI_DISK0_MAJOR #ifdef SCSI_DISK8_MAJOR #define SCSI_DISK_MAJOR(M) ((M) == SCSI_DISK0_MAJOR || \ ((M) >= SCSI_DISK1_MAJOR && (M) <= SCSI_DISK7_MAJOR) || \ ((M) >= SCSI_DISK8_MAJOR && (M) <= SCSI_DISK15_MAJOR)) #else #define SCSI_DISK_MAJOR(M) ((M) == SCSI_DISK0_MAJOR || \ ((M) >= SCSI_DISK1_MAJOR && (M) <= SCSI_DISK7_MAJOR)) #endif /* defined(SCSI_DISK8_MAJOR) */ #define SCSI_BLK_MAJOR(M) (SCSI_DISK_MAJOR((M)) || (M) == SCSI_CDROM_MAJOR) #else #define SCSI_BLK_MAJOR(M) ((M) == SCSI_DISK_MAJOR || (M) == SCSI_CDROM_MAJOR) #endif /* defined(SCSI_DISK0_MAJOR) */ #endif /* defined(SCSI_BLK_MAJOR) */ if (((MAJOR(s.st_rdev) == HD_MAJOR && MINOR(s.st_rdev)%64 == 0) || (SCSI_BLK_MAJOR(MAJOR(s.st_rdev)) && MINOR(s.st_rdev)%16 == 0))) { printf("%s is entire device, not just one partition!\n", device); proceed_question(); } #endif } void check_mount(const char *device, int force, const char *type) { errcode_t retval; int mount_flags; retval = ext2fs_check_if_mounted(device, &mount_flags); if (retval) { bb_error_msg("can't determine if %s is mounted", device); return; } if (mount_flags & EXT2_MF_MOUNTED) { bb_error_msg("%s is mounted !", device); force_check: if (force) bb_error_msg("badblocks forced anyways"); else bb_error_msg_and_die("it's not safe to run badblocks!"); } if (mount_flags & EXT2_MF_BUSY) { bb_error_msg("%s is apparently in use by the system", device); goto force_check; } } void parse_journal_opts(char **journal_device, int *journal_flags, int *journal_size, const char *opts) { char *buf, *token, *next, *p, *arg; int journal_usage = 0; buf = xstrdup(opts); for (token = buf; token && *token; token = next) { p = strchr(token, ','); next = 0; if (p) { *p = 0; next = p+1; } arg = strchr(token, '='); if (arg) { *arg = 0; arg++; } if (strcmp(token, "device") == 0) { *journal_device = blkid_get_devname(NULL, arg, NULL); if (!*journal_device) { journal_usage++; continue; } } else if (strcmp(token, "size") == 0) { if (!arg) { journal_usage++; continue; } (*journal_size) = strtoul(arg, &p, 0); if (*p) journal_usage++; } else if (strcmp(token, "v1_superblock") == 0) { (*journal_flags) |= EXT2_MKJOURNAL_V1_SUPER; continue; } else journal_usage++; } if (journal_usage) bb_error_msg_and_die( "\nBad journal options specified.\n\n" "Journal options are separated by commas, " "and may take an argument which\n" "\tis set off by an equals ('=') sign.\n\n" "Valid journal options are:\n" "\tsize=<journal size in megabytes>\n" "\tdevice=<journal device>\n\n" "The journal size must be between " "1024 and 102400 filesystem blocks.\n\n"); } /* * Determine the number of journal blocks to use, either via * user-specified # of megabytes, or via some intelligently selected * defaults. * * Find a reasonable journal file size (in blocks) given the number of blocks * in the filesystem. For very small filesystems, it is not reasonable to * have a journal that fills more than half of the filesystem. */ int figure_journal_size(int size, ext2_filsys fs) { blk_t j_blocks; if (fs->super->s_blocks_count < 2048) { bb_error_msg("Filesystem too small for a journal"); return 0; } if (size >= 0) { j_blocks = size * 1024 / (fs->blocksize / 1024); if (j_blocks < 1024 || j_blocks > 102400) bb_error_msg_and_die("\nThe requested journal " "size is %d blocks;\n it must be " "between 1024 and 102400 blocks; Aborting", j_blocks); if (j_blocks > fs->super->s_free_blocks_count) bb_error_msg_and_die("Journal size too big for filesystem"); return j_blocks; } if (fs->super->s_blocks_count < 32768) j_blocks = 1024; else if (fs->super->s_blocks_count < 256*1024) j_blocks = 4096; else if (fs->super->s_blocks_count < 512*1024) j_blocks = 8192; else if (fs->super->s_blocks_count < 1024*1024) j_blocks = 16384; else j_blocks = 32768; return j_blocks; } void print_check_message(ext2_filsys fs) { printf("This filesystem will be automatically " "checked every %d mounts or\n" "%g days, whichever comes first. " "Use tune2fs -c or -i to override.\n", fs->super->s_max_mnt_count, (double)fs->super->s_checkinterval / (3600 * 24)); } void make_journal_device(char *journal_device, ext2_filsys fs, int quiet, int force) { errcode_t retval; ext2_filsys jfs; io_manager io_ptr; check_plausibility(journal_device, force); check_mount(journal_device, force, "journal"); io_ptr = unix_io_manager; retval = ext2fs_open(journal_device, EXT2_FLAG_RW| EXT2_FLAG_JOURNAL_DEV_OK, 0, fs->blocksize, io_ptr, &jfs); if (retval) bb_error_msg_and_die("can't journal device %s", journal_device); if (!quiet) printf("Adding journal to device %s: ", journal_device); fflush(stdout); retval = ext2fs_add_journal_device(fs, jfs); if (retval) bb_error_msg_and_die("\nFailed to add journal to device %s", journal_device); if (!quiet) puts("done"); ext2fs_close(jfs); } void make_journal_blocks(ext2_filsys fs, int journal_size, int journal_flags, int quiet) { unsigned long journal_blocks; errcode_t retval; journal_blocks = figure_journal_size(journal_size, fs); if (!journal_blocks) { fs->super->s_feature_compat &= ~EXT3_FEATURE_COMPAT_HAS_JOURNAL; return; } if (!quiet) printf("Creating journal (%lu blocks): ", journal_blocks); fflush(stdout); retval = ext2fs_add_journal_inode(fs, journal_blocks, journal_flags); if (retval) bb_error_msg_and_die("can't create journal"); if (!quiet) puts("done"); } char *e2fs_set_sbin_path(void) { char *oldpath = getenv("PATH"); /* Update our PATH to include /sbin */ #define PATH_SET "/sbin" if (oldpath) oldpath = xasprintf("%s:%s", PATH_SET, oldpath); else oldpath = PATH_SET; putenv(oldpath); return oldpath; }