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comparison toys/mke2fs.c @ 80:7a058d60faf1

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One more field, minor shrinking, and start on block groups.
author Rob Landley <rob@landley.net>
date Sat, 27 Jan 2007 15:10:48 -0500
parents 1aff4181427b
children f95f6fd94eed
comparison
equal deleted inserted replaced
79:1aff4181427b 80:7a058d60faf1
77 // Fill out superblock structure 77 // Fill out superblock structure
78 78
79 // Determine appropriate block size, set log_block_size and log_frag_size. 79 // Determine appropriate block size, set log_block_size and log_frag_size.
80 80
81 if (!TT.blocksize) TT.blocksize = (length && length < 1<<29) ? 1024 : 4096; 81 if (!TT.blocksize) TT.blocksize = (length && length < 1<<29) ? 1024 : 4096;
82 if (TT.blocksize == 1024) temp = 0; 82 for (temp = 0; temp < 7; temp++) if (TT.blocksize == 1024<<temp) break;
83 else if (TT.blocksize == 2048) temp = 1; 83 if (temp==7) error_exit("bad blocksize");
84 else if (TT.blocksize == 4096) temp = 2;
85 else error_exit("bad blocksize");
86 sb->log_block_size = sb->log_frag_size = SWAP_LE32(temp); 84 sb->log_block_size = sb->log_frag_size = SWAP_LE32(temp);
87 85
88 // Fill out blocks_count and r_blocks_count 86 // Fill out blocks_count, r_blocks_count, first_data_block
89 87
90 if (!TT.blocks) TT.blocks = length/TT.blocksize; 88 if (!TT.blocks) TT.blocks = length/TT.blocksize;
91 sb->blocks_count = SWAP_LE32(TT.blocks); 89 sb->blocks_count = SWAP_LE32(TT.blocks);
92 90
93 if (!TT.reserved_percent) TT.reserved_percent = 5; 91 if (!TT.reserved_percent) TT.reserved_percent = 5;
94 temp = (TT.blocks * (uint64_t)TT.reserved_percent) /100; 92 temp = (TT.blocks * (uint64_t)TT.reserved_percent) /100;
95 sb->r_blocks_count = SWAP_LE32(temp); 93 sb->r_blocks_count = SWAP_LE32(temp);
94
95 sb->first_data_block = TT.blocksize == 1024 ? 1 : 0;
96 96
97 // Set blocks_per_group and frags_per_group, which is the size of an 97 // Set blocks_per_group and frags_per_group, which is the size of an
98 // allocation bitmap that fits in one block (I.E. how many bits per block)? 98 // allocation bitmap that fits in one block (I.E. how many bits per block)?
99 99
100 temp = TT.blocksize*8; 100 temp = TT.blocksize*8;