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[PATCH 08/17] quota: Store maximum space limit in bytes

To: linux-fsdevel@xxxxxxxxxxxxxxx
Subject: [PATCH 08/17] quota: Store maximum space limit in bytes
From: Jan Kara <jack@xxxxxxx>
Date: Fri, 16 Jan 2015 13:47:42 +0100
Cc: xfs@xxxxxxxxxxx, cluster-devel@xxxxxxxxxx, ocfs2-devel@xxxxxxxxxxxxxx, Jan Kara <jack@xxxxxxx>
Delivered-to: xfs@xxxxxxxxxxx
In-reply-to: <1421412471-4747-1-git-send-email-jack@xxxxxxx>
References: <1421412471-4747-1-git-send-email-jack@xxxxxxx>
Currently maximum space limit quota format supports is in blocks however
since we store space limits in bytes, this is somewhat confusing. So
store the maximum limit in bytes as well. Also rename the field to match
the new unit and related inode field to match the new naming scheme.

Signed-off-by: Jan Kara <jack@xxxxxxx>
---
 fs/ocfs2/quota_local.c |  4 ++--
 fs/quota/dquot.c       | 18 ++++--------------
 fs/quota/quota_v1.c    |  4 ++--
 fs/quota/quota_v2.c    | 10 +++++-----
 include/linux/quota.h  |  4 ++--
 5 files changed, 15 insertions(+), 25 deletions(-)

diff --git a/fs/ocfs2/quota_local.c b/fs/ocfs2/quota_local.c
index 55f832f553cb..89c0b2620814 100644
--- a/fs/ocfs2/quota_local.c
+++ b/fs/ocfs2/quota_local.c
@@ -701,8 +701,8 @@ static int ocfs2_local_read_info(struct super_block *sb, 
int type)
        /* We don't need the lock and we have to acquire quota file locks
         * which will later depend on this lock */
        mutex_unlock(&sb_dqopt(sb)->dqio_mutex);
-       info->dqi_maxblimit = 0x7fffffffffffffffLL;
-       info->dqi_maxilimit = 0x7fffffffffffffffLL;
+       info->dqi_max_spc_limit = 0x7fffffffffffffffLL;
+       info->dqi_max_ino_limit = 0x7fffffffffffffffLL;
        oinfo = kmalloc(sizeof(struct ocfs2_mem_dqinfo), GFP_NOFS);
        if (!oinfo) {
                mlog(ML_ERROR, "failed to allocate memory for ocfs2 quota"
diff --git a/fs/quota/dquot.c b/fs/quota/dquot.c
index 79f49d04ad20..02d571cb010a 100644
--- a/fs/quota/dquot.c
+++ b/fs/quota/dquot.c
@@ -2467,16 +2467,6 @@ out_err:
 }
 EXPORT_SYMBOL(dquot_quota_disable);
 
-static inline qsize_t qbtos(qsize_t blocks)
-{
-       return blocks << QIF_DQBLKSIZE_BITS;
-}
-
-static inline qsize_t stoqb(qsize_t space)
-{
-       return (space + QIF_DQBLKSIZE - 1) >> QIF_DQBLKSIZE_BITS;
-}
-
 /* Generic routine for getting common part of quota structure */
 static void do_get_dqblk(struct dquot *dquot, struct qc_dqblk *di)
 {
@@ -2526,13 +2516,13 @@ static int do_set_dqblk(struct dquot *dquot, struct 
qc_dqblk *di)
                return -EINVAL;
 
        if (((di->d_fieldmask & QC_SPC_SOFT) &&
-            stoqb(di->d_spc_softlimit) > dqi->dqi_maxblimit) ||
+            di->d_spc_softlimit > dqi->dqi_max_spc_limit) ||
            ((di->d_fieldmask & QC_SPC_HARD) &&
-            stoqb(di->d_spc_hardlimit) > dqi->dqi_maxblimit) ||
+            di->d_spc_hardlimit > dqi->dqi_max_spc_limit) ||
            ((di->d_fieldmask & QC_INO_SOFT) &&
-            (di->d_ino_softlimit > dqi->dqi_maxilimit)) ||
+            (di->d_ino_softlimit > dqi->dqi_max_ino_limit)) ||
            ((di->d_fieldmask & QC_INO_HARD) &&
-            (di->d_ino_hardlimit > dqi->dqi_maxilimit)))
+            (di->d_ino_hardlimit > dqi->dqi_max_ino_limit)))
                return -ERANGE;
 
        spin_lock(&dq_data_lock);
diff --git a/fs/quota/quota_v1.c b/fs/quota/quota_v1.c
index 469c6848b322..8fe79beced5c 100644
--- a/fs/quota/quota_v1.c
+++ b/fs/quota/quota_v1.c
@@ -169,8 +169,8 @@ static int v1_read_file_info(struct super_block *sb, int 
type)
        }
        ret = 0;
        /* limits are stored as unsigned 32-bit data */
-       dqopt->info[type].dqi_maxblimit = 0xffffffff;
-       dqopt->info[type].dqi_maxilimit = 0xffffffff;
+       dqopt->info[type].dqi_max_spc_limit = 0xffffffffULL << QUOTABLOCK_BITS;
+       dqopt->info[type].dqi_max_ino_limit = 0xffffffff;
        dqopt->info[type].dqi_igrace =
                        dqblk.dqb_itime ? dqblk.dqb_itime : MAX_IQ_TIME;
        dqopt->info[type].dqi_bgrace =
diff --git a/fs/quota/quota_v2.c b/fs/quota/quota_v2.c
index b291602e1193..8aa5a092de9f 100644
--- a/fs/quota/quota_v2.c
+++ b/fs/quota/quota_v2.c
@@ -117,12 +117,12 @@ static int v2_read_file_info(struct super_block *sb, int 
type)
        qinfo = info->dqi_priv;
        if (version == 0) {
                /* limits are stored as unsigned 32-bit data */
-               info->dqi_maxblimit = 0xffffffff;
-               info->dqi_maxilimit = 0xffffffff;
+               info->dqi_max_spc_limit = 0xffffffffULL << QUOTABLOCK_BITS;
+               info->dqi_max_ino_limit = 0xffffffff;
        } else {
-               /* used space is stored as unsigned 64-bit value */
-               info->dqi_maxblimit = 0xffffffffffffffffULL;    /* 2^64-1 */
-               info->dqi_maxilimit = 0xffffffffffffffffULL;
+               /* used space is stored as unsigned 64-bit value in bytes */
+               info->dqi_max_spc_limit = 0xffffffffffffffffULL; /* 2^64-1 */
+               info->dqi_max_ino_limit = 0xffffffffffffffffULL;
        }
        info->dqi_bgrace = le32_to_cpu(dinfo.dqi_bgrace);
        info->dqi_igrace = le32_to_cpu(dinfo.dqi_igrace);
diff --git a/include/linux/quota.h b/include/linux/quota.h
index 0938159d65c8..d534e8ed308a 100644
--- a/include/linux/quota.h
+++ b/include/linux/quota.h
@@ -216,8 +216,8 @@ struct mem_dqinfo {
        unsigned long dqi_flags;
        unsigned int dqi_bgrace;
        unsigned int dqi_igrace;
-       qsize_t dqi_maxblimit;
-       qsize_t dqi_maxilimit;
+       qsize_t dqi_max_spc_limit;
+       qsize_t dqi_max_ino_limit;
        void *dqi_priv;
 };
 
-- 
2.1.2

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