quota: Use function to provide i_dquot pointers
i_dquot array is used by relatively few filesystems (ext?, ocfs2, jfs,
reiserfs) so it is beneficial to move this array to fs-private part of
the inode. We cannot just pass quota pointers from filesystems to quota
functions because during quotaon and quotaoff we have to traverse list
of all inodes and manipulate i_dquot pointers for each inode. So we
provide a function which generic quota code can use to get pointer to
the i_dquot array from the filesystem.
Acked-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jan Kara <jack@suse.cz>
diff --git a/fs/quota/dquot.c b/fs/quota/dquot.c
index b1910c9..b80d1fe 100644
--- a/fs/quota/dquot.c
+++ b/fs/quota/dquot.c
@@ -893,6 +893,14 @@
}
EXPORT_SYMBOL(dqget);
+static inline struct dquot **i_dquot(struct inode *inode)
+{
+ /* Temporary workaround until all filesystems are converted. */
+ if (!inode->i_sb->s_op->get_dquots)
+ return inode->i_dquot;
+ return inode->i_sb->s_op->get_dquots(inode);
+}
+
static int dqinit_needed(struct inode *inode, int type)
{
int cnt;
@@ -900,9 +908,9 @@
if (IS_NOQUOTA(inode))
return 0;
if (type != -1)
- return !inode->i_dquot[type];
+ return !i_dquot(inode)[type];
for (cnt = 0; cnt < MAXQUOTAS; cnt++)
- if (!inode->i_dquot[cnt])
+ if (!i_dquot(inode)[cnt])
return 1;
return 0;
}
@@ -965,9 +973,9 @@
static void remove_inode_dquot_ref(struct inode *inode, int type,
struct list_head *tofree_head)
{
- struct dquot *dquot = inode->i_dquot[type];
+ struct dquot *dquot = i_dquot(inode)[type];
- inode->i_dquot[type] = NULL;
+ i_dquot(inode)[type] = NULL;
if (!dquot)
return;
@@ -1402,7 +1410,7 @@
* we check it without locking here to avoid unnecessary
* dqget()/dqput() calls.
*/
- if (inode->i_dquot[cnt])
+ if (i_dquot(inode)[cnt])
continue;
init_needed = 1;
@@ -1433,8 +1441,8 @@
/* We could race with quotaon or dqget() could have failed */
if (!got[cnt])
continue;
- if (!inode->i_dquot[cnt]) {
- inode->i_dquot[cnt] = got[cnt];
+ if (!i_dquot(inode)[cnt]) {
+ i_dquot(inode)[cnt] = got[cnt];
got[cnt] = NULL;
/*
* Make quota reservation system happy if someone
@@ -1442,7 +1450,7 @@
*/
rsv = inode_get_rsv_space(inode);
if (unlikely(rsv))
- dquot_resv_space(inode->i_dquot[cnt], rsv);
+ dquot_resv_space(i_dquot(inode)[cnt], rsv);
}
}
out_err:
@@ -1472,8 +1480,8 @@
spin_lock(&dq_data_lock);
for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
- put[cnt] = inode->i_dquot[cnt];
- inode->i_dquot[cnt] = NULL;
+ put[cnt] = i_dquot(inode)[cnt];
+ i_dquot(inode)[cnt] = NULL;
}
spin_unlock(&dq_data_lock);
dqput_all(put);
@@ -1494,7 +1502,7 @@
* add quota pointers back anyway.
*/
for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
- if (inode->i_dquot[cnt])
+ if (i_dquot(inode)[cnt])
break;
}
@@ -1595,7 +1603,7 @@
{
int cnt, ret = 0, index;
struct dquot_warn warn[MAXQUOTAS];
- struct dquot **dquots = inode->i_dquot;
+ struct dquot **dquots = i_dquot(inode);
int reserve = flags & DQUOT_SPACE_RESERVE;
if (!dquot_active(inode)) {
@@ -1647,7 +1655,7 @@
{
int cnt, ret = 0, index;
struct dquot_warn warn[MAXQUOTAS];
- struct dquot * const *dquots = inode->i_dquot;
+ struct dquot * const *dquots = i_dquot(inode);
if (!dquot_active(inode))
return 0;
@@ -1696,14 +1704,14 @@
spin_lock(&dq_data_lock);
/* Claim reserved quotas to allocated quotas */
for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
- if (inode->i_dquot[cnt])
- dquot_claim_reserved_space(inode->i_dquot[cnt],
+ if (i_dquot(inode)[cnt])
+ dquot_claim_reserved_space(i_dquot(inode)[cnt],
number);
}
/* Update inode bytes */
inode_claim_rsv_space(inode, number);
spin_unlock(&dq_data_lock);
- mark_all_dquot_dirty(inode->i_dquot);
+ mark_all_dquot_dirty(i_dquot(inode));
srcu_read_unlock(&dquot_srcu, index);
return 0;
}
@@ -1725,14 +1733,14 @@
spin_lock(&dq_data_lock);
/* Claim reserved quotas to allocated quotas */
for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
- if (inode->i_dquot[cnt])
- dquot_reclaim_reserved_space(inode->i_dquot[cnt],
+ if (i_dquot(inode)[cnt])
+ dquot_reclaim_reserved_space(i_dquot(inode)[cnt],
number);
}
/* Update inode bytes */
inode_reclaim_rsv_space(inode, number);
spin_unlock(&dq_data_lock);
- mark_all_dquot_dirty(inode->i_dquot);
+ mark_all_dquot_dirty(i_dquot(inode));
srcu_read_unlock(&dquot_srcu, index);
return;
}
@@ -1745,7 +1753,7 @@
{
unsigned int cnt;
struct dquot_warn warn[MAXQUOTAS];
- struct dquot **dquots = inode->i_dquot;
+ struct dquot **dquots = i_dquot(inode);
int reserve = flags & DQUOT_SPACE_RESERVE, index;
if (!dquot_active(inode)) {
@@ -1788,7 +1796,7 @@
{
unsigned int cnt;
struct dquot_warn warn[MAXQUOTAS];
- struct dquot * const *dquots = inode->i_dquot;
+ struct dquot * const *dquots = i_dquot(inode);
int index;
if (!dquot_active(inode))
@@ -1865,7 +1873,7 @@
if (!sb_has_quota_active(inode->i_sb, cnt))
continue;
is_valid[cnt] = 1;
- transfer_from[cnt] = inode->i_dquot[cnt];
+ transfer_from[cnt] = i_dquot(inode)[cnt];
ret = check_idq(transfer_to[cnt], 1, &warn_to[cnt]);
if (ret)
goto over_quota;
@@ -1901,7 +1909,7 @@
dquot_incr_space(transfer_to[cnt], cur_space);
dquot_resv_space(transfer_to[cnt], rsv_space);
- inode->i_dquot[cnt] = transfer_to[cnt];
+ i_dquot(inode)[cnt] = transfer_to[cnt];
}
spin_unlock(&dq_data_lock);