errcode_t ext2fs_mmp_init(ext2_filsys fs)
{
struct ext2_super_block *sb = fs->super;
blk64_t mmp_block;
errcode_t retval;
if (sb->s_mmp_update_interval == 0)
sb->s_mmp_update_interval = EXT4_MMP_UPDATE_INTERVAL;
/* This is probably excessively large, but who knows? */
else if (sb->s_mmp_update_interval > EXT4_MMP_MAX_UPDATE_INTERVAL)
return EXT2_ET_INVALID_ARGUMENT;
if (fs->mmp_buf == NULL) {
retval = ext2fs_get_mem(fs->blocksize, &fs->mmp_buf);
if (retval)
goto out;
}
retval = ext2fs_alloc_block2(fs, 0, fs->mmp_buf, &mmp_block);
if (retval)
goto out;
sb->s_mmp_block = mmp_block;
retval = ext2fs_mmp_reset(fs);
if (retval)
goto out;
out:
return retval;
}
errcode_t ext2fs_mmp_clear(ext2_filsys fs)
{
errcode_t retval = 0;
if (!(fs->flags & EXT2_FLAG_RW))
return EXT2_ET_RO_FILSYS;
retval = ext2fs_mmp_reset(fs);
return retval;
}
errcode_t ext2fs_mmp_clear(ext2_filsys fs)
{
#ifdef CONFIG_MMP
errcode_t retval = 0;
if (!(fs->flags & EXT2_FLAG_RW))
return EXT2_ET_RO_FILSYS;
retval = ext2fs_mmp_reset(fs);
return retval;
#else
return EXT2_ET_OP_NOT_SUPPORTED;
#endif
}
