mkfs.minix: more cleanups, -~300 bytes of code.
Added debugging support.
This commit is contained in:
Denis Vlasenko
parent
c6ce8733dd
commit
66b86c6902
@ -33,8 +33,8 @@
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* 03.01.94 - Added support for file system valid flag.
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* (Dr. Wettstein, greg%wind.uucp@plains.nodak.edu)
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*
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* 30.10.94 - added support for v2 filesystem
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* (Andreas Schwab, schwab@issan.informatik.uni-dortmund.de)
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* 30.10.94 - added support for v2 filesystem
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* (Andreas Schwab, schwab@issan.informatik.uni-dortmund.de)
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*
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* 09.11.94 - Added test to prevent overwrite of mounted fs adapted
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* from Theodore Ts'o's (tytso@athena.mit.edu) mke2fs
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@ -65,32 +65,24 @@
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#include "busybox.h"
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#include <mntent.h>
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#define MINIX_ROOT_INO 1
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#define MINIX_LINK_MAX 250
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#define MINIX2_LINK_MAX 65530
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#define DEBUG 0
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#define MINIX_I_MAP_SLOTS 8
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#define MINIX_Z_MAP_SLOTS 64
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#define MINIX_SUPER_MAGIC 0x137F /* original minix fs */
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#define MINIX_SUPER_MAGIC2 0x138F /* minix fs, 30 char names */
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#define MINIX2_SUPER_MAGIC 0x2468 /* minix V2 fs */
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#define MINIX2_SUPER_MAGIC2 0x2478 /* minix V2 fs, 30 char names */
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#define MINIX_VALID_FS 0x0001 /* Clean fs. */
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#define MINIX_ERROR_FS 0x0002 /* fs has errors. */
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#define MINIX_INODES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct minix_inode)))
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#define MINIX2_INODES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct minix2_inode)))
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#define MINIX_V1 0x0001 /* original minix fs */
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#define MINIX_V2 0x0002 /* minix V2 fs */
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#define INODE_VERSION(inode) inode->i_sb->u.minix_sb.s_version
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/* If debugging, store the very same times/uids/gids for image consistency */
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#if DEBUG
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# define CUR_TIME 0
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# define GETUID 0
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# define GETGID 0
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#else
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# define CUR_TIME time(NULL)
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# define GETUID getuid()
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# define GETGID getgid()
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#endif
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/*
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* This is the original minix inode layout on disk.
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* Note the 8-bit gid and atime and ctime.
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*/
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struct minix_inode {
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struct minix1_inode {
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uint16_t i_mode;
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uint16_t i_uid;
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uint32_t i_size;
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@ -139,107 +131,106 @@ struct minix_dir_entry {
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char name[0];
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};
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#define NAME_MAX 255 /* # chars in a file name */
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/* Believe it or not, but mount.h has this one */
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#undef BLOCK_SIZE
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enum {
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BLOCK_SIZE = 1024,
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BITS_PER_BLOCK = BLOCK_SIZE << 3,
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#define MINIX_INODES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct minix_inode)))
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MINIX_ROOT_INO = 1,
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MINIX_BAD_INO = 2,
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MAX_GOOD_BLOCKS = 512,
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#define MINIX_VALID_FS 0x0001 /* Clean fs. */
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#define MINIX_ERROR_FS 0x0002 /* fs has errors. */
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MINIX1_SUPER_MAGIC = 0x137F, /* original minix fs */
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MINIX1_SUPER_MAGIC2 = 0x138F, /* minix fs, 30 char names */
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MINIX2_SUPER_MAGIC = 0x2468, /* minix V2 fs */
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MINIX2_SUPER_MAGIC2 = 0x2478, /* minix V2 fs, 30 char names */
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MINIX_VALID_FS = 0x0001, /* clean fs */
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MINIX_ERROR_FS = 0x0002, /* fs has errors */
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#define MINIX_SUPER_MAGIC 0x137F /* original minix fs */
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#define MINIX_SUPER_MAGIC2 0x138F /* minix fs, 30 char names */
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INODE_SIZE1 = sizeof(struct minix1_inode),
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INODE_SIZE2 = sizeof(struct minix2_inode),
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MINIX1_INODES_PER_BLOCK = BLOCK_SIZE / sizeof(struct minix1_inode),
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MINIX2_INODES_PER_BLOCK = BLOCK_SIZE / sizeof(struct minix2_inode),
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#ifndef BLKGETSIZE
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#define BLKGETSIZE _IO(0x12,96) /* return device size */
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#endif
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TEST_BUFFER_BLOCKS = 16,
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};
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#ifndef __linux__
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#define volatile
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#endif
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#define MINIX_ROOT_INO 1
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#define MINIX_BAD_INO 2
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#define TEST_BUFFER_BLOCKS 16
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#define MAX_GOOD_BLOCKS 512
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#define UPPER(size,n) (((size)+((n)-1))/(n))
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#define INODE_SIZE (sizeof(struct minix_inode))
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#if ENABLE_FEATURE_MINIX2
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# define INODE_SIZE2 (sizeof(struct minix2_inode))
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# define INODE_BLOCKS UPPER(INODES, (version2 ? MINIX2_INODES_PER_BLOCK \
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: MINIX_INODES_PER_BLOCK))
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#else
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# define INODE_BLOCKS UPPER(INODES, (MINIX_INODES_PER_BLOCK))
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#endif
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#define INODE_BUFFER_SIZE (INODE_BLOCKS * BLOCK_SIZE)
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#define BITS_PER_BLOCK (BLOCK_SIZE<<3)
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static char *device_name;
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static int DEV = -1;
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static uint32_t BLOCKS;
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static int badblocks;
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/* default (changed to 30, per Linus's suggestion, Sun Nov 21 08:05:07 1993) */
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static int namelen = 30;
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static int dirsize = 32;
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static int magic = MINIX_SUPER_MAGIC2;
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#if ENABLE_FEATURE_MINIX2
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static int version2;
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#else
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enum { version2 = 0 };
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#endif
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static char *device_name;
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static int dev_fd = -1;
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static uint32_t total_blocks;
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static int badblocks;
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/* default (changed to 30, per Linus's suggestion, Sun Nov 21 08:05:07 1993) */
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static int namelen = 30;
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static int dirsize = 32;
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static int magic = MINIX1_SUPER_MAGIC2;
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static char root_block[BLOCK_SIZE];
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static char *inode_buffer;
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#define Inode (((struct minix_inode *) inode_buffer)-1)
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#if ENABLE_FEATURE_MINIX2
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#define Inode2 (((struct minix2_inode *) inode_buffer)-1)
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#endif
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static char super_block_buffer[BLOCK_SIZE];
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static char boot_block_buffer[512];
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#define Super (*(struct minix_super_block *)super_block_buffer)
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#define INODES (Super.s_ninodes)
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#if ENABLE_FEATURE_MINIX2
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# define ZONES (version2 ? Super.s_zones : Super.s_nzones)
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#else
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# define ZONES (Super.s_nzones)
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#endif
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#define IMAPS (Super.s_imap_blocks)
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#define ZMAPS (Super.s_zmap_blocks)
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#define FIRSTZONE (Super.s_firstdatazone)
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#define ZONESIZE (Super.s_log_zone_size)
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#define MAXSIZE (Super.s_max_size)
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#define MAGIC (Super.s_magic)
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#define NORM_FIRSTZONE (2+IMAPS+ZMAPS+INODE_BLOCKS)
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static char *inode_buffer;
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static char *inode_map;
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static char *zone_map;
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static unsigned short good_blocks_table[MAX_GOOD_BLOCKS];
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static int used_good_blocks;
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static unsigned short good_blocks_table[MAX_GOOD_BLOCKS];
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static unsigned long req_nr_inodes;
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static int bit(char* a, unsigned i)
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extern inline unsigned div_roundup(unsigned size, unsigned n)
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{
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return (a[i >> 3] & (1<<(i & 7))) != 0;
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return (size + n-1) / n;
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}
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#define inode_in_use(x) (bit(inode_map,(x)))
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#define zone_in_use(x) (bit(zone_map,(x)-FIRSTZONE+1))
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#define mark_inode(x) (setbit(inode_map,(x)))
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#define unmark_inode(x) (clrbit(inode_map,(x)))
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#define INODE_BUF1 (((struct minix1_inode*)inode_buffer) - 1)
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#define INODE_BUF2 (((struct minix2_inode*)inode_buffer) - 1)
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#define SB (*(struct minix_super_block*)super_block_buffer)
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#define SB_INODES (SB.s_ninodes)
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#define SB_IMAPS (SB.s_imap_blocks)
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#define SB_ZMAPS (SB.s_zmap_blocks)
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#define SB_FIRSTZONE (SB.s_firstdatazone)
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#define SB_ZONE_SIZE (SB.s_log_zone_size)
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#define SB_MAXSIZE (SB.s_max_size)
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#define SB_MAGIC (SB.s_magic)
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#if !ENABLE_FEATURE_MINIX2
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# define SB_ZONES (SB.s_nzones)
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# define INODE_BLOCKS div_roundup(SB_INODES, MINIX1_INODES_PER_BLOCK)
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#else
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# define SB_ZONES (version2 ? SB.s_zones : SB.s_nzones)
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# define INODE_BLOCKS div_roundup(SB_INODES, \
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version2 ? MINIX2_INODES_PER_BLOCK : MINIX1_INODES_PER_BLOCK)
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#endif
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#define INODE_BUFFER_SIZE (INODE_BLOCKS * BLOCK_SIZE)
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#define NORM_FIRSTZONE (2 + SB_IMAPS + SB_ZMAPS + INODE_BLOCKS)
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static int bit(const char* a, unsigned i)
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{
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return a[i >> 3] & (1<<(i & 7));
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}
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/* Note: do not assume 0/1, it is 0/nonzero */
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#define inode_in_use(x) bit(inode_map,(x))
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#define zone_in_use(x) bit(zone_map,(x)-SB_FIRSTZONE+1)
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#define mark_inode(x) setbit(inode_map,(x))
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#define unmark_inode(x) clrbit(inode_map,(x))
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#define mark_zone(x) setbit(zone_map,(x)-SB_FIRSTZONE+1)
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#define unmark_zone(x) clrbit(zone_map,(x)-SB_FIRSTZONE+1)
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#ifndef BLKGETSIZE
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# define BLKGETSIZE _IO(0x12,96) /* return device size */
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#endif
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#define mark_zone(x) (setbit(zone_map,(x)-FIRSTZONE+1))
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#define unmark_zone(x) (clrbit(zone_map,(x)-FIRSTZONE+1))
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static long valid_offset(int fd, int offset)
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{
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@ -291,37 +282,37 @@ static int get_size(const char *file)
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static void write_tables(void)
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{
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/* Mark the super block valid. */
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Super.s_state |= MINIX_VALID_FS;
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Super.s_state &= ~MINIX_ERROR_FS;
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SB.s_state |= MINIX_VALID_FS;
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SB.s_state &= ~MINIX_ERROR_FS;
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msg_eol = "seek to 0 failed";
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xlseek(DEV, 0, SEEK_SET);
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xlseek(dev_fd, 0, SEEK_SET);
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msg_eol = "cannot clear boot sector";
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xwrite(DEV, boot_block_buffer, 512);
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xwrite(dev_fd, boot_block_buffer, 512);
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msg_eol = "seek to BLOCK_SIZE failed";
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xlseek(DEV, BLOCK_SIZE, SEEK_SET);
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xlseek(dev_fd, BLOCK_SIZE, SEEK_SET);
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msg_eol = "cannot write superblock";
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xwrite(DEV, super_block_buffer, BLOCK_SIZE);
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xwrite(dev_fd, super_block_buffer, BLOCK_SIZE);
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msg_eol = "cannot write inode map";
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xwrite(DEV, inode_map, IMAPS * BLOCK_SIZE);
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xwrite(dev_fd, inode_map, SB_IMAPS * BLOCK_SIZE);
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msg_eol = "cannot write zone map";
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xwrite(DEV, zone_map, ZMAPS * BLOCK_SIZE);
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xwrite(dev_fd, zone_map, SB_ZMAPS * BLOCK_SIZE);
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msg_eol = "cannot write inodes";
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xwrite(DEV, inode_buffer, INODE_BUFFER_SIZE);
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xwrite(dev_fd, inode_buffer, INODE_BUFFER_SIZE);
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msg_eol = "\n";
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}
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static void write_block(int blk, char *buffer)
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{
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xlseek(DEV, blk * BLOCK_SIZE, SEEK_SET);
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xwrite(DEV, buffer, BLOCK_SIZE);
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xlseek(dev_fd, blk * BLOCK_SIZE, SEEK_SET);
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xwrite(dev_fd, buffer, BLOCK_SIZE);
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}
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static int get_free_block(void)
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@ -333,10 +324,10 @@ static int get_free_block(void)
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if (used_good_blocks)
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blk = good_blocks_table[used_good_blocks - 1] + 1;
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else
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blk = FIRSTZONE;
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while (blk < ZONES && zone_in_use(blk))
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blk = SB_FIRSTZONE;
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while (blk < SB_ZONES && zone_in_use(blk))
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blk++;
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if (blk >= ZONES)
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if (blk >= SB_ZONES)
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bb_error_msg_and_die("not enough good blocks");
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good_blocks_table[used_good_blocks] = blk;
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used_good_blocks++;
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@ -354,8 +345,8 @@ static void mark_good_blocks(void)
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static int next(int zone)
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{
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if (!zone)
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zone = FIRSTZONE - 1;
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while (++zone < ZONES)
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zone = SB_FIRSTZONE - 1;
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while (++zone < SB_ZONES)
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if (zone_in_use(zone))
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return zone;
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return 0;
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@ -363,7 +354,7 @@ static int next(int zone)
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static void make_bad_inode(void)
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{
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struct minix_inode *inode = &Inode[MINIX_BAD_INO];
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struct minix1_inode *inode = &INODE_BUF1[MINIX_BAD_INO];
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int i, j, zone;
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int ind = 0, dind = 0;
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unsigned short ind_block[BLOCK_SIZE >> 1];
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@ -377,7 +368,7 @@ static void make_bad_inode(void)
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inode->i_nlinks = 1;
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/* BTW, setting this makes all images different */
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/* it's harder to check for bugs then - diff isn't helpful :(... */
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inode->i_time = time(NULL);
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inode->i_time = CUR_TIME;
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inode->i_mode = S_IFREG + 0000;
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inode->i_size = badblocks * BLOCK_SIZE;
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zone = next(0);
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@ -406,7 +397,7 @@ static void make_bad_inode(void)
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}
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}
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bb_error_msg_and_die("too many bad blocks");
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end_bad:
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end_bad:
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if (ind)
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write_block(ind, (char *) ind_block);
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if (dind)
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@ -416,7 +407,7 @@ static void make_bad_inode(void)
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#if ENABLE_FEATURE_MINIX2
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static void make_bad_inode2(void)
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{
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struct minix2_inode *inode = &Inode2[MINIX_BAD_INO];
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struct minix2_inode *inode = &INODE_BUF2[MINIX_BAD_INO];
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int i, j, zone;
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int ind = 0, dind = 0;
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unsigned long ind_block[BLOCK_SIZE >> 2];
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@ -426,7 +417,7 @@ static void make_bad_inode2(void)
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return;
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mark_inode(MINIX_BAD_INO);
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inode->i_nlinks = 1;
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inode->i_atime = inode->i_mtime = inode->i_ctime = time(NULL);
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inode->i_atime = inode->i_mtime = inode->i_ctime = CUR_TIME;
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inode->i_mode = S_IFREG + 0000;
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inode->i_size = badblocks * BLOCK_SIZE;
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zone = next(0);
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@ -456,7 +447,7 @@ static void make_bad_inode2(void)
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}
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/* Could make triple indirect block here */
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bb_error_msg_and_die("too many bad blocks");
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end_bad:
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end_bad:
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if (ind)
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write_block(ind, (char *) ind_block);
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if (dind)
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@ -466,12 +457,12 @@ static void make_bad_inode2(void)
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static void make_root_inode(void)
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{
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struct minix_inode *inode = &Inode[MINIX_ROOT_INO];
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struct minix1_inode *inode = &INODE_BUF1[MINIX_ROOT_INO];
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mark_inode(MINIX_ROOT_INO);
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inode->i_zone[0] = get_free_block();
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inode->i_nlinks = 2;
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inode->i_time = time(NULL);
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inode->i_time = CUR_TIME;
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if (badblocks)
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inode->i_size = 3 * dirsize;
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else {
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@ -480,21 +471,21 @@ static void make_root_inode(void)
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inode->i_size = 2 * dirsize;
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}
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inode->i_mode = S_IFDIR + 0755;
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inode->i_uid = getuid();
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inode->i_uid = GETUID;
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if (inode->i_uid)
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inode->i_gid = getgid();
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inode->i_gid = GETGID;
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write_block(inode->i_zone[0], root_block);
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}
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#if ENABLE_FEATURE_MINIX2
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static void make_root_inode2(void)
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{
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struct minix2_inode *inode = &Inode2[MINIX_ROOT_INO];
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struct minix2_inode *inode = &INODE_BUF2[MINIX_ROOT_INO];
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mark_inode(MINIX_ROOT_INO);
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inode->i_zone[0] = get_free_block();
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inode->i_nlinks = 2;
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inode->i_atime = inode->i_mtime = inode->i_ctime = time(NULL);
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inode->i_atime = inode->i_mtime = inode->i_ctime = CUR_TIME;
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if (badblocks)
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inode->i_size = 3 * dirsize;
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else {
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@ -503,9 +494,9 @@ static void make_root_inode2(void)
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inode->i_size = 2 * dirsize;
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}
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inode->i_mode = S_IFDIR + 0755;
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inode->i_uid = getuid();
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inode->i_uid = GETUID;
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if (inode->i_uid)
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inode->i_gid = getgid();
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inode->i_gid = GETGID;
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write_block(inode->i_zone[0], root_block);
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||||
}
|
||||
#endif
|
||||
@ -517,65 +508,64 @@ static void setup_tables(void)
|
||||
|
||||
memset(super_block_buffer, 0, BLOCK_SIZE);
|
||||
memset(boot_block_buffer, 0, 512);
|
||||
MAGIC = magic;
|
||||
ZONESIZE = 0;
|
||||
MAXSIZE = version2 ? 0x7fffffff : (7 + 512 + 512 * 512) * 1024;
|
||||
if (version2) {
|
||||
Super.s_zones = BLOCKS;
|
||||
} else
|
||||
Super.s_nzones = BLOCKS;
|
||||
SB_MAGIC = magic;
|
||||
SB_ZONE_SIZE = 0;
|
||||
SB_MAXSIZE = version2 ? 0x7fffffff : (7 + 512 + 512 * 512) * 1024;
|
||||
if (version2)
|
||||
SB.s_zones = total_blocks;
|
||||
else
|
||||
SB.s_nzones = total_blocks;
|
||||
|
||||
/* some magic nrs: 1 inode / 3 blocks */
|
||||
/* some magic nrs: 1 inode / 3 blocks */
|
||||
if (req_nr_inodes == 0)
|
||||
inodes = BLOCKS / 3;
|
||||
inodes = total_blocks / 3;
|
||||
else
|
||||
inodes = req_nr_inodes;
|
||||
/* Round up inode count to fill block size */
|
||||
if (version2)
|
||||
inodes = ((inodes + MINIX2_INODES_PER_BLOCK - 1) &
|
||||
~(MINIX2_INODES_PER_BLOCK - 1));
|
||||
inodes = (inodes + MINIX2_INODES_PER_BLOCK - 1) &
|
||||
~(MINIX2_INODES_PER_BLOCK - 1);
|
||||
else
|
||||
inodes = ((inodes + MINIX_INODES_PER_BLOCK - 1) &
|
||||
~(MINIX_INODES_PER_BLOCK - 1));
|
||||
inodes = (inodes + MINIX1_INODES_PER_BLOCK - 1) &
|
||||
~(MINIX1_INODES_PER_BLOCK - 1);
|
||||
if (inodes > 65535)
|
||||
inodes = 65535;
|
||||
INODES = inodes;
|
||||
IMAPS = UPPER(INODES + 1, BITS_PER_BLOCK);
|
||||
ZMAPS = 0;
|
||||
i = 0;
|
||||
while (ZMAPS !=
|
||||
UPPER(BLOCKS - (2 + IMAPS + ZMAPS + INODE_BLOCKS) + 1,
|
||||
BITS_PER_BLOCK) && i < 1000) {
|
||||
ZMAPS =
|
||||
UPPER(BLOCKS - (2 + IMAPS + ZMAPS + INODE_BLOCKS) + 1,
|
||||
BITS_PER_BLOCK);
|
||||
i++;
|
||||
}
|
||||
SB_INODES = inodes;
|
||||
SB_IMAPS = div_roundup(SB_INODES + 1, BITS_PER_BLOCK);
|
||||
|
||||
/* Real bad hack but overwise mkfs.minix can be thrown
|
||||
* in infinite loop...
|
||||
* try:
|
||||
* dd if=/dev/zero of=test.fs count=10 bs=1024
|
||||
* /sbin/mkfs.minix -i 200 test.fs
|
||||
* */
|
||||
if (i >= 999) {
|
||||
bb_error_msg_and_die("cannot allocate buffers for maps");
|
||||
}
|
||||
FIRSTZONE = NORM_FIRSTZONE;
|
||||
inode_map = xmalloc(IMAPS * BLOCK_SIZE);
|
||||
zone_map = xmalloc(ZMAPS * BLOCK_SIZE);
|
||||
memset(inode_map, 0xff, IMAPS * BLOCK_SIZE);
|
||||
memset(zone_map, 0xff, ZMAPS * BLOCK_SIZE);
|
||||
for (i = FIRSTZONE; i < ZONES; i++)
|
||||
* mkfs.minix -i 200 test.fs
|
||||
*/
|
||||
/* This code is not insane: NORM_FIRSTZONE is not a constant, */
|
||||
/* it uses previous value of SB_ZMAPS inside */
|
||||
i = 999;
|
||||
SB_ZMAPS = 0;
|
||||
do {
|
||||
uint16_t t = div_roundup(total_blocks - NORM_FIRSTZONE + 1, BITS_PER_BLOCK);
|
||||
if (SB_ZMAPS == t) goto got_it;
|
||||
SB_ZMAPS = t;
|
||||
} while (--i);
|
||||
bb_error_msg_and_die("incompatible size/inode count, try different -i N");
|
||||
got_it:
|
||||
|
||||
SB_FIRSTZONE = NORM_FIRSTZONE;
|
||||
inode_map = xmalloc(SB_IMAPS * BLOCK_SIZE);
|
||||
zone_map = xmalloc(SB_ZMAPS * BLOCK_SIZE);
|
||||
memset(inode_map, 0xff, SB_IMAPS * BLOCK_SIZE);
|
||||
memset(zone_map, 0xff, SB_ZMAPS * BLOCK_SIZE);
|
||||
for (i = SB_FIRSTZONE; i < SB_ZONES; i++)
|
||||
unmark_zone(i);
|
||||
for (i = MINIX_ROOT_INO; i <= INODES; i++)
|
||||
for (i = MINIX_ROOT_INO; i <= SB_INODES; i++)
|
||||
unmark_inode(i);
|
||||
inode_buffer = xmalloc(INODE_BUFFER_SIZE);
|
||||
memset(inode_buffer, 0, INODE_BUFFER_SIZE);
|
||||
printf("%ld inodes\n", (long)INODES);
|
||||
printf("%ld blocks\n", (long)ZONES);
|
||||
printf("Firstdatazone=%ld (%ld)\n", (long)FIRSTZONE, (long)NORM_FIRSTZONE);
|
||||
printf("Zonesize=%d\n", BLOCK_SIZE << ZONESIZE);
|
||||
printf("Maxsize=%ld\n\n", (long)MAXSIZE);
|
||||
inode_buffer = xzalloc(INODE_BUFFER_SIZE);
|
||||
printf("%ld inodes\n", (long)SB_INODES);
|
||||
printf("%ld blocks\n", (long)SB_ZONES);
|
||||
printf("Firstdatazone=%ld (%ld)\n", (long)SB_FIRSTZONE, (long)NORM_FIRSTZONE);
|
||||
printf("Zonesize=%d\n", BLOCK_SIZE << SB_ZONE_SIZE);
|
||||
printf("Maxsize=%ld\n", (long)SB_MAXSIZE);
|
||||
}
|
||||
|
||||
/*
|
||||
@ -588,11 +578,11 @@ static long do_check(char *buffer, int try, unsigned current_block)
|
||||
|
||||
/* Seek to the correct loc. */
|
||||
msg_eol = "seek failed during testing of blocks";
|
||||
xlseek(DEV, current_block * BLOCK_SIZE, SEEK_SET);
|
||||
xlseek(dev_fd, current_block * BLOCK_SIZE, SEEK_SET);
|
||||
msg_eol = "\n";
|
||||
|
||||
/* Try the read */
|
||||
got = read(DEV, buffer, try * BLOCK_SIZE);
|
||||
got = read(dev_fd, buffer, try * BLOCK_SIZE);
|
||||
if (got < 0)
|
||||
got = 0;
|
||||
if (got & (BLOCK_SIZE - 1)) {
|
||||
@ -606,7 +596,7 @@ static unsigned currently_testing;
|
||||
|
||||
static void alarm_intr(int alnum)
|
||||
{
|
||||
if (currently_testing >= ZONES)
|
||||
if (currently_testing >= SB_ZONES)
|
||||
return;
|
||||
signal(SIGALRM, alarm_intr);
|
||||
alarm(5);
|
||||
@ -624,18 +614,18 @@ static void check_blocks(void)
|
||||
currently_testing = 0;
|
||||
signal(SIGALRM, alarm_intr);
|
||||
alarm(5);
|
||||
while (currently_testing < ZONES) {
|
||||
while (currently_testing < SB_ZONES) {
|
||||
msg_eol = "seek failed in check_blocks";
|
||||
xlseek(DEV, currently_testing * BLOCK_SIZE, SEEK_SET);
|
||||
xlseek(dev_fd, currently_testing * BLOCK_SIZE, SEEK_SET);
|
||||
msg_eol = "\n";
|
||||
try = TEST_BUFFER_BLOCKS;
|
||||
if (currently_testing + try > ZONES)
|
||||
try = ZONES - currently_testing;
|
||||
if (currently_testing + try > SB_ZONES)
|
||||
try = SB_ZONES - currently_testing;
|
||||
got = do_check(buffer, try, currently_testing);
|
||||
currently_testing += got;
|
||||
if (got == try)
|
||||
continue;
|
||||
if (currently_testing < FIRSTZONE)
|
||||
if (currently_testing < SB_FIRSTZONE)
|
||||
bb_error_msg_and_die("bad blocks before data-area: cannot make fs");
|
||||
mark_zone(currently_testing);
|
||||
badblocks++;
|
||||
@ -660,13 +650,14 @@ static void get_list_blocks(char *filename)
|
||||
|
||||
int mkfs_minix_main(int argc, char **argv)
|
||||
{
|
||||
struct mntent *mp;
|
||||
unsigned opt;
|
||||
char *tmp;
|
||||
struct stat statbuf;
|
||||
char *str_i, *str_n;
|
||||
char *listfile = NULL;
|
||||
|
||||
if (INODE_SIZE * MINIX_INODES_PER_BLOCK != BLOCK_SIZE)
|
||||
if (INODE_SIZE1 * MINIX1_INODES_PER_BLOCK != BLOCK_SIZE)
|
||||
bb_error_msg_and_die("bad inode size");
|
||||
#if ENABLE_FEATURE_MINIX2
|
||||
if (INODE_SIZE2 * MINIX2_INODES_PER_BLOCK != BLOCK_SIZE)
|
||||
@ -680,8 +671,8 @@ int mkfs_minix_main(int argc, char **argv)
|
||||
//if (opt & 4) -l
|
||||
if (opt & 8) { // -n
|
||||
namelen = xatoi_u(str_n);
|
||||
if (namelen == 14) magic = MINIX_SUPER_MAGIC;
|
||||
else if (namelen == 30) magic = MINIX_SUPER_MAGIC2;
|
||||
if (namelen == 14) magic = MINIX1_SUPER_MAGIC;
|
||||
else if (namelen == 30) magic = MINIX1_SUPER_MAGIC2;
|
||||
else bb_show_usage();
|
||||
dirsize = namelen + 2;
|
||||
}
|
||||
@ -697,23 +688,42 @@ int mkfs_minix_main(int argc, char **argv)
|
||||
device_name = *argv++;
|
||||
if (!device_name)
|
||||
bb_show_usage();
|
||||
if (*argv) {
|
||||
BLOCKS = xatou32(*argv);
|
||||
if (BLOCKS < 10)
|
||||
bb_show_usage();
|
||||
} else
|
||||
BLOCKS = get_size(device_name) / 1024;
|
||||
if (*argv)
|
||||
total_blocks = xatou32(*argv);
|
||||
else
|
||||
total_blocks = get_size(device_name) / 1024;
|
||||
|
||||
if (total_blocks < 10)
|
||||
bb_error_msg_and_die("must have at least 10 blocks");
|
||||
|
||||
if (version2) {
|
||||
magic = MINIX2_SUPER_MAGIC2;
|
||||
if (namelen == 14)
|
||||
magic = MINIX2_SUPER_MAGIC;
|
||||
} else if (BLOCKS > 65535)
|
||||
BLOCKS = 65535;
|
||||
} else if (total_blocks > 65535)
|
||||
total_blocks = 65535;
|
||||
|
||||
if (find_mount_point(device_name, NULL))
|
||||
bb_error_msg_and_die("%s is mounted; refusing to make "
|
||||
"a filesystem", device_name);
|
||||
/* Check if it is mounted */
|
||||
mp = find_mount_point(device_name, NULL);
|
||||
if (mp && strcmp(device_name, mp->mnt_fsname) == 0)
|
||||
bb_error_msg_and_die("%s is mounted on %s; "
|
||||
"refusing to make a filesystem",
|
||||
device_name, mp->mnt_dir);
|
||||
|
||||
dev_fd = xopen(device_name, O_RDWR);
|
||||
if (fstat(dev_fd, &statbuf) < 0)
|
||||
bb_error_msg_and_die("cannot stat %s", device_name);
|
||||
if (!S_ISBLK(statbuf.st_mode))
|
||||
opt &= ~1; // clear -c (check)
|
||||
|
||||
/* I don't know why someone has special code to prevent mkfs.minix
|
||||
* on IDE devices. Why IDE but not SCSI, etc?... */
|
||||
#if 0
|
||||
else if (statbuf.st_rdev == 0x0300 || statbuf.st_rdev == 0x0340)
|
||||
/* what is this? */
|
||||
bb_error_msg_and_die("will not try "
|
||||
"to make filesystem on '%s'", device_name);
|
||||
#endif
|
||||
|
||||
tmp = root_block;
|
||||
*(short *) tmp = 1;
|
||||
@ -725,14 +735,6 @@ int mkfs_minix_main(int argc, char **argv)
|
||||
*(short *) tmp = 2;
|
||||
strcpy(tmp + 2, ".badblocks");
|
||||
|
||||
DEV = xopen(device_name, O_RDWR);
|
||||
if (fstat(DEV, &statbuf) < 0)
|
||||
bb_error_msg_and_die("cannot stat %s", device_name);
|
||||
if (!S_ISBLK(statbuf.st_mode))
|
||||
opt &= ~1; // clear -c (check)
|
||||
else if (statbuf.st_rdev == 0x0300 || statbuf.st_rdev == 0x0340)
|
||||
bb_error_msg_and_die("will not try to make filesystem on '%s'", device_name);
|
||||
|
||||
setup_tables();
|
||||
|
||||
if (opt & 1) // -c ?
|
||||
|
||||
Loading…
Reference in New Issue
Block a user