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mke2fs: Add check to make sure inode_size * num_inodes isn't too big

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A quick patch to sanity check the inode ratio vs the inode size.  In
some cases Lustre users have tried specifying an inode size of 4096
bytes, while keeping an inode ratio of one inode per 4096 bytes.  I'm
sure more people will do this now that large inodes are available in
ext4 and documented in e2fsprogs.

Signed-off-by: Andreas Dilger <adilger@clusterfs.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
This commit is contained in:
Andreas Dilger 2007-05-22 16:04:51 -04:00 committed by Theodore Ts'o
parent 96c6a3acd3
commit dcf7b091c3
2 changed files with 19 additions and 0 deletions
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5
misc/ChangeLog
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@ -1,3 +1,8 @@
2007-05-22 Theodore Tso <tytso@mit.edu>
* mke2fs.c (PRS): Add sanity check if the inode size * inode count
is bigger than the filesystem size.
2007-05-18 Theodore Tso <tytso@mit.edu>
* mke2fs.c (main): Save the raid stride to the superblock

14
misc/mke2fs.c
View File

@ -1489,6 +1489,20 @@ static void PRS(int argc, char *argv[])
((__u64) fs_param.s_blocks_count * blocksize)
/ inode_ratio;
if ((((long long)fs_param.s_inodes_count) *
(inode_size ? inode_size : EXT2_GOOD_OLD_INODE_SIZE)) >=
(((long long)fs_param.s_blocks_count) *
EXT2_BLOCK_SIZE(&fs_param))) {
com_err(program_name, 0, _("inode_size (%u) * inodes_count "
"(%u) too big for a\n\t"
"filesystem with %lu blocks, "
"specify higher inode_ratio (-i)\n\t"
"or lower inode count (-N).\n"),
inode_size ? inode_size : EXT2_GOOD_OLD_INODE_SIZE,
fs_param.s_inodes_count, fs_param.s_blocks_count);
exit(1);
}
/*
* Calculate number of blocks to reserve
*/