quota: use time64_t internally

The quota subsystem has two formats, the old v1 format using architecture
specific time_t values on the on-disk format, while the v2 format
(introduced in Linux 2.5.16 and 2.4.22) uses fixed 64-bit little-endian.

While there is no future for the v1 format beyond y2038, the v2 format
is almost there on 32-bit architectures, as both the user interface
and the on-disk format use 64-bit timestamps, just not the time_t
inbetween.

This changes the internal representation to use time64_t, which will
end up doing the right thing everywhere for v2 format.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jan Kara <jack@suse.cz>

diff --git a/fs/ocfs2/quota_global.c b/fs/ocfs2/quota_global.c
index ab6a6cd..87e577a 100644 (file)
--- a/fs/ocfs2/quota_global.c
+++ b/fs/ocfs2/quota_global.c
@@ -483,7 +483,7 @@ int __ocfs2_sync_dquot(struct dquot *dquot, int freeing)
        struct ocfs2_mem_dqinfo *info = sb_dqinfo(sb, type)->dqi_priv;
        struct ocfs2_global_disk_dqblk dqblk;
        s64 spacechange, inodechange;
-       time_t olditime, oldbtime;
+       time64_t olditime, oldbtime;
 
        err = sb->s_op->quota_read(sb, type, (char *)&dqblk,
                                   sizeof(struct ocfs2_global_disk_dqblk),

diff --git a/fs/quota/dquot.c b/fs/quota/dquot.c
index ff21980..b1322dd 100644 (file)
--- a/fs/quota/dquot.c
+++ b/fs/quota/dquot.c
@@ -1133,7 +1133,7 @@ static void dquot_decr_inodes(struct dquot *dquot, qsize_t number)
        else
                dquot->dq_dqb.dqb_curinodes = 0;
        if (dquot->dq_dqb.dqb_curinodes <= dquot->dq_dqb.dqb_isoftlimit)
-               dquot->dq_dqb.dqb_itime = (time_t) 0;
+               dquot->dq_dqb.dqb_itime = (time64_t) 0;
        clear_bit(DQ_INODES_B, &dquot->dq_flags);
 }
 
@@ -1145,7 +1145,7 @@ static void dquot_decr_space(struct dquot *dquot, qsize_t number)
        else
                dquot->dq_dqb.dqb_curspace = 0;
        if (dquot->dq_dqb.dqb_curspace <= dquot->dq_dqb.dqb_bsoftlimit)
-               dquot->dq_dqb.dqb_btime = (time_t) 0;
+               dquot->dq_dqb.dqb_btime = (time64_t) 0;
        clear_bit(DQ_BLKS_B, &dquot->dq_flags);
 }
 
@@ -1292,7 +1292,7 @@ static int check_idq(struct dquot *dquot, qsize_t inodes,
        if (dquot->dq_dqb.dqb_isoftlimit &&
            newinodes > dquot->dq_dqb.dqb_isoftlimit &&
            dquot->dq_dqb.dqb_itime &&
-           get_seconds() >= dquot->dq_dqb.dqb_itime &&
+           ktime_get_real_seconds() >= dquot->dq_dqb.dqb_itime &&
             !ignore_hardlimit(dquot)) {
                prepare_warning(warn, dquot, QUOTA_NL_ISOFTLONGWARN);
                return -EDQUOT;
@@ -1302,7 +1302,7 @@ static int check_idq(struct dquot *dquot, qsize_t inodes,
            newinodes > dquot->dq_dqb.dqb_isoftlimit &&
            dquot->dq_dqb.dqb_itime == 0) {
                prepare_warning(warn, dquot, QUOTA_NL_ISOFTWARN);
-               dquot->dq_dqb.dqb_itime = get_seconds() +
+               dquot->dq_dqb.dqb_itime = ktime_get_real_seconds() +
                    sb_dqopt(dquot->dq_sb)->info[dquot->dq_id.type].dqi_igrace;
        }
 
@@ -1334,7 +1334,7 @@ static int check_bdq(struct dquot *dquot, qsize_t space, int prealloc,
        if (dquot->dq_dqb.dqb_bsoftlimit &&
            tspace > dquot->dq_dqb.dqb_bsoftlimit &&
            dquot->dq_dqb.dqb_btime &&
-           get_seconds() >= dquot->dq_dqb.dqb_btime &&
+           ktime_get_real_seconds() >= dquot->dq_dqb.dqb_btime &&
             !ignore_hardlimit(dquot)) {
                if (!prealloc)
                        prepare_warning(warn, dquot, QUOTA_NL_BSOFTLONGWARN);
@@ -1346,7 +1346,7 @@ static int check_bdq(struct dquot *dquot, qsize_t space, int prealloc,
            dquot->dq_dqb.dqb_btime == 0) {
                if (!prealloc) {
                        prepare_warning(warn, dquot, QUOTA_NL_BSOFTWARN);
-                       dquot->dq_dqb.dqb_btime = get_seconds() +
+                       dquot->dq_dqb.dqb_btime = ktime_get_real_seconds() +
                            sb_dqopt(sb)->info[dquot->dq_id.type].dqi_bgrace;
                }
                else
@@ -2695,7 +2695,7 @@ static int do_set_dqblk(struct dquot *dquot, struct qc_dqblk *di)
                        clear_bit(DQ_BLKS_B, &dquot->dq_flags);
                } else if (!(di->d_fieldmask & QC_SPC_TIMER))
                        /* Set grace only if user hasn't provided his own... */
-                       dm->dqb_btime = get_seconds() + dqi->dqi_bgrace;
+                       dm->dqb_btime = ktime_get_real_seconds() + dqi->dqi_bgrace;
        }
        if (check_ilim) {
                if (!dm->dqb_isoftlimit ||
@@ -2704,7 +2704,7 @@ static int do_set_dqblk(struct dquot *dquot, struct qc_dqblk *di)
                        clear_bit(DQ_INODES_B, &dquot->dq_flags);
                } else if (!(di->d_fieldmask & QC_INO_TIMER))
                        /* Set grace only if user hasn't provided his own... */
-                       dm->dqb_itime = get_seconds() + dqi->dqi_igrace;
+                       dm->dqb_itime = ktime_get_real_seconds() + dqi->dqi_igrace;
        }
        if (dm->dqb_bhardlimit || dm->dqb_bsoftlimit || dm->dqb_ihardlimit ||
            dm->dqb_isoftlimit)

diff --git a/include/linux/quota.h b/include/linux/quota.h
index 9dfb6bc..8486d27 100644 (file)
--- a/include/linux/quota.h
+++ b/include/linux/quota.h
@@ -200,8 +200,8 @@ struct mem_dqblk {
        qsize_t dqb_ihardlimit; /* absolute limit on allocated inodes */
        qsize_t dqb_isoftlimit; /* preferred inode limit */
        qsize_t dqb_curinodes;  /* current # allocated inodes */
-       time_t dqb_btime;       /* time limit for excessive disk use */
-       time_t dqb_itime;       /* time limit for excessive inode use */
+       time64_t dqb_btime;     /* time limit for excessive disk use */
+       time64_t dqb_itime;     /* time limit for excessive inode use */
 };
 
 /*