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MFS: fix block estimation computation

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David van Moolenbroek 2012-08-02 13:03:23 +00:00
parent 9c7bae4e16
commit 2d20088881
1 changed files with 6 additions and 6 deletions
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12
servers/mfs/stadir.c
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@ -18,25 +18,25 @@ static blkcnt_t estimate_blocks(struct inode *rip)
* indirect blocks is too costly for a stat call, so we disregard holes and
* return a conservative estimation.
*/
unsigned int zone_size, zones;
blkcnt_t sindirs, dindirs, nr_indirs, sq_indirs;
blkcnt_t zones, sindirs, dindirs, nr_indirs, sq_indirs;
unsigned int zone_size;
/* Compute the number of zones used by the file. */
zone_size = rip->i_sp->s_block_size << rip->i_sp->s_log_zone_size;
zones = (rip->i_size + zone_size - 1) / zone_size;
zones = (blkcnt_t) ((rip->i_size + zone_size - 1) / zone_size);
/* Compute the number of indirect blocks needed for that zone count. */
nr_indirs = (blkcnt_t) rip->i_nindirs;
sq_indirs = nr_indirs * nr_indirs;
sindirs = (blkcnt_t) (zones - rip->i_ndzones + nr_indirs - 1) / nr_indirs;
dindirs = (blkcnt_t) (sindirs - 1 + sq_indirs - 1) / sq_indirs;
sindirs = (zones - (blkcnt_t) rip->i_ndzones + nr_indirs - 1) / nr_indirs;
dindirs = (sindirs - 1 + sq_indirs - 1) / sq_indirs;
/* Return the number of 512-byte blocks corresponding to the number of data
* zones and indirect blocks.
*/
return((blkcnt_t) (zones + sindirs + dindirs) * (zone_size / 512));
return (zones + sindirs + dindirs) * (blkcnt_t) (zone_size / 512);
}
/*===========================================================================*