^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) * super.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Copyright (C) 2001-2002 Will Dyson <will_dyson@pobox.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Licensed under the GNU GPL. See the file COPYING for details.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <asm/page.h> /* for PAGE_SIZE */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include "befs.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include "super.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) * befs_load_sb -- Read from disk and properly byteswap all the fields
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) * of the befs superblock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) befs_load_sb(struct super_block *sb, befs_super_block *disk_sb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) struct befs_sb_info *befs_sb = BEFS_SB(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) /* Check the byte order of the filesystem */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) if (disk_sb->fs_byte_order == BEFS_BYTEORDER_NATIVE_LE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) befs_sb->byte_order = BEFS_BYTESEX_LE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) else if (disk_sb->fs_byte_order == BEFS_BYTEORDER_NATIVE_BE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) befs_sb->byte_order = BEFS_BYTESEX_BE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) befs_sb->magic1 = fs32_to_cpu(sb, disk_sb->magic1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) befs_sb->magic2 = fs32_to_cpu(sb, disk_sb->magic2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) befs_sb->magic3 = fs32_to_cpu(sb, disk_sb->magic3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) befs_sb->block_size = fs32_to_cpu(sb, disk_sb->block_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) befs_sb->block_shift = fs32_to_cpu(sb, disk_sb->block_shift);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) befs_sb->num_blocks = fs64_to_cpu(sb, disk_sb->num_blocks);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) befs_sb->used_blocks = fs64_to_cpu(sb, disk_sb->used_blocks);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) befs_sb->inode_size = fs32_to_cpu(sb, disk_sb->inode_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) befs_sb->blocks_per_ag = fs32_to_cpu(sb, disk_sb->blocks_per_ag);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) befs_sb->ag_shift = fs32_to_cpu(sb, disk_sb->ag_shift);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) befs_sb->num_ags = fs32_to_cpu(sb, disk_sb->num_ags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) befs_sb->flags = fs32_to_cpu(sb, disk_sb->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) befs_sb->log_blocks = fsrun_to_cpu(sb, disk_sb->log_blocks);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) befs_sb->log_start = fs64_to_cpu(sb, disk_sb->log_start);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) befs_sb->log_end = fs64_to_cpu(sb, disk_sb->log_end);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) befs_sb->root_dir = fsrun_to_cpu(sb, disk_sb->root_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) befs_sb->indices = fsrun_to_cpu(sb, disk_sb->indices);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) befs_sb->nls = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) return BEFS_OK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) befs_check_sb(struct super_block *sb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) struct befs_sb_info *befs_sb = BEFS_SB(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) /* Check magic headers of super block */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) if ((befs_sb->magic1 != BEFS_SUPER_MAGIC1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) || (befs_sb->magic2 != BEFS_SUPER_MAGIC2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) || (befs_sb->magic3 != BEFS_SUPER_MAGIC3)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) befs_error(sb, "invalid magic header");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) return BEFS_ERR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) * Check blocksize of BEFS.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) * Blocksize of BEFS is 1024, 2048, 4096 or 8192.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) if ((befs_sb->block_size != 1024)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) && (befs_sb->block_size != 2048)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) && (befs_sb->block_size != 4096)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) && (befs_sb->block_size != 8192)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) befs_error(sb, "invalid blocksize: %u", befs_sb->block_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) return BEFS_ERR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) if (befs_sb->block_size > PAGE_SIZE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) befs_error(sb, "blocksize(%u) cannot be larger "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) "than system pagesize(%lu)", befs_sb->block_size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) PAGE_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) return BEFS_ERR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) * block_shift and block_size encode the same information
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) * in different ways as a consistency check.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) if ((1 << befs_sb->block_shift) != befs_sb->block_size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) befs_error(sb, "block_shift disagrees with block_size. "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) "Corruption likely.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) return BEFS_ERR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) /* ag_shift also encodes the same information as blocks_per_ag in a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) * different way, non-fatal consistency check
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) if ((1 << befs_sb->ag_shift) != befs_sb->blocks_per_ag)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) befs_error(sb, "ag_shift disagrees with blocks_per_ag.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) if (befs_sb->log_start != befs_sb->log_end ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) befs_sb->flags == BEFS_DIRTY) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) befs_error(sb, "Filesystem not clean! There are blocks in the "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) "journal. You must boot into BeOS and mount this "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) "volume to make it clean.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) return BEFS_ERR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) return BEFS_OK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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