quota: Increase size of variables for limits and inode usage
So far quota was fine with quota block limits and inode limits/numbers in
a 32-bit type. Now with rapid increase in storage sizes there are coming
requests to be able to handle quota limits above 4TB / more that 2^32 inodes.
So bump up sizes of types in mem_dqblk structure to 64-bits to be able to
handle this. Also update inode allocation / checking functions to use qsize_t
and make global structure keep quota limits in bytes so that things are
consistent.
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
diff --git a/fs/quota_v1.c b/fs/quota_v1.c
index 5ae15b1..3e078ee 100644
--- a/fs/quota_v1.c
+++ b/fs/quota_v1.c
@@ -14,14 +14,27 @@
MODULE_DESCRIPTION("Old quota format support");
MODULE_LICENSE("GPL");
+#define QUOTABLOCK_BITS 10
+#define QUOTABLOCK_SIZE (1 << QUOTABLOCK_BITS)
+
+static inline qsize_t v1_stoqb(qsize_t space)
+{
+ return (space + QUOTABLOCK_SIZE - 1) >> QUOTABLOCK_BITS;
+}
+
+static inline qsize_t v1_qbtos(qsize_t blocks)
+{
+ return blocks << QUOTABLOCK_BITS;
+}
+
static void v1_disk2mem_dqblk(struct mem_dqblk *m, struct v1_disk_dqblk *d)
{
m->dqb_ihardlimit = d->dqb_ihardlimit;
m->dqb_isoftlimit = d->dqb_isoftlimit;
m->dqb_curinodes = d->dqb_curinodes;
- m->dqb_bhardlimit = d->dqb_bhardlimit;
- m->dqb_bsoftlimit = d->dqb_bsoftlimit;
- m->dqb_curspace = ((qsize_t)d->dqb_curblocks) << QUOTABLOCK_BITS;
+ m->dqb_bhardlimit = v1_qbtos(d->dqb_bhardlimit);
+ m->dqb_bsoftlimit = v1_qbtos(d->dqb_bsoftlimit);
+ m->dqb_curspace = v1_qbtos(d->dqb_curblocks);
m->dqb_itime = d->dqb_itime;
m->dqb_btime = d->dqb_btime;
}
@@ -31,9 +44,9 @@
d->dqb_ihardlimit = m->dqb_ihardlimit;
d->dqb_isoftlimit = m->dqb_isoftlimit;
d->dqb_curinodes = m->dqb_curinodes;
- d->dqb_bhardlimit = m->dqb_bhardlimit;
- d->dqb_bsoftlimit = m->dqb_bsoftlimit;
- d->dqb_curblocks = toqb(m->dqb_curspace);
+ d->dqb_bhardlimit = v1_stoqb(m->dqb_bhardlimit);
+ d->dqb_bsoftlimit = v1_stoqb(m->dqb_bsoftlimit);
+ d->dqb_curblocks = v1_stoqb(m->dqb_curspace);
d->dqb_itime = m->dqb_itime;
d->dqb_btime = m->dqb_btime;
}