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Check for firstdatazone overflow.

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This commit is contained in:
Ben Gras 2009-02-17 13:01:25 +00:00
parent 733d6c1ef6
commit cd37a0299c
1 changed files with 18 additions and 3 deletions
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21
commands/simple/mkfs.c
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@ -427,6 +427,7 @@ ino_t inodes;
unsigned int i;
int inodeblks;
int initblks;
u32_t nb;
zone_t initzones, nrzones, v1sq, v2sq;
zone_t zo;
@ -445,14 +446,28 @@ ino_t inodes;
sup->s_nzones = 0; /* not used in V2 - 0 forces errors early */
sup->s_zones = zones;
}
sup->s_imap_blocks = bitmapsize((bit_t) (1 + inodes), block_size);
sup->s_zmap_blocks = bitmapsize((bit_t) zones, block_size);
#define BIGGERBLOCKS "Please try a larger block size for an FS of this size.\n"
sup->s_imap_blocks = nb = bitmapsize((bit_t) (1 + inodes), block_size);
if(sup->s_imap_blocks != nb) {
fprintf(stderr, "mkfs: too many inode bitmap blocks.\n" BIGGERBLOCKS);
exit(1);
}
sup->s_zmap_blocks = nb = bitmapsize((bit_t) zones, block_size);
if(nb != sup->s_zmap_blocks) {
fprintf(stderr, "mkfs: too many block bitmap blocks.\n" BIGGERBLOCKS);
exit(1);
}
inode_offset = sup->s_imap_blocks + sup->s_zmap_blocks + 2;
inodeblks = (inodes + inodes_per_block - 1) / inodes_per_block;
initblks = inode_offset + inodeblks;
initzones = (initblks + (1 << zone_shift) - 1) >> zone_shift;
nrzones = nrblocks >> zone_shift;
sup->s_firstdatazone = (initblks + (1 << zone_shift) - 1) >> zone_shift;
sup->s_firstdatazone = nb = (initblks + (1 << zone_shift) - 1) >> zone_shift;
if(nb != sup->s_firstdatazone) {
fprintf(stderr, "mkfs: too much bitmap and inode data.\n" BIGGERBLOCKS);
exit(1);
}
zoff = sup->s_firstdatazone - 1;
sup->s_log_zone_size = zone_shift;
if (fs_version == 1) {