[PATCH 01/11] quota: add wrapper function

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This helps us to make code more readable.

Signed-off-by: Dmitry Monakhov <dmonakhov@xxxxxxxxx>
---
 fs/ext3/super.c          |    2 +-
 fs/ext4/super.c          |    2 +-
 fs/ocfs2/quota_global.c  |    4 ++--
 fs/quota/dquot.c         |   18 +++++++++---------
 fs/quota/quota_tree.c    |    2 +-
 fs/quota/quota_v1.c      |    8 ++++----
 include/linux/quota.h    |    1 +
 include/linux/quotaops.h |    4 ++++
 8 files changed, 23 insertions(+), 18 deletions(-)

diff --git a/fs/ext3/super.c b/fs/ext3/super.c
index 15f63d3..c5b0c1d 100644
--- a/fs/ext3/super.c
+++ b/fs/ext3/super.c
@@ -2751,7 +2751,7 @@ static int ext3_statfs (struct dentry * dentry, struct kstatfs * buf)
 
 static inline struct inode *dquot_to_inode(struct dquot *dquot)
 {
-	return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type];
+	return dq_opt(dquot)->files[dquot->dq_type];
 }
 
 static int ext3_write_dquot(struct dquot *dquot)
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index bcf86b3..301462a 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -3968,7 +3968,7 @@ static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf)
 
 static inline struct inode *dquot_to_inode(struct dquot *dquot)
 {
-	return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type];
+	return dq_opt(dquot)->files[dquot->dq_type];
 }
 
 static int ext4_write_dquot(struct dquot *dquot)
diff --git a/fs/ocfs2/quota_global.c b/fs/ocfs2/quota_global.c
index 4607923..2c88a87 100644
--- a/fs/ocfs2/quota_global.c
+++ b/fs/ocfs2/quota_global.c
@@ -657,9 +657,9 @@ static int ocfs2_write_dquot(struct dquot *dquot)
 		mlog_errno(status);
 		goto out;
 	}
-	mutex_lock(&sb_dqopt(dquot->dq_sb)->dqio_mutex);
+	mutex_lock(&dq_opt(dqopt)->dqio_mutex);
 	status = ocfs2_local_write_dquot(dquot);
-	mutex_unlock(&sb_dqopt(dquot->dq_sb)->dqio_mutex);
+	mutex_unlock(&dq_opt(dqopt)->dqio_mutex);
 	ocfs2_commit_trans(osb, handle);
 out:
 	mlog_exit(status);
diff --git a/fs/quota/dquot.c b/fs/quota/dquot.c
index 686c2b7..ce542e2 100644
--- a/fs/quota/dquot.c
+++ b/fs/quota/dquot.c
@@ -346,7 +346,7 @@ int dquot_mark_dquot_dirty(struct dquot *dquot)
 
 	spin_lock(&dq_list_lock);
 	if (!test_and_set_bit(DQ_MOD_B, &dquot->dq_flags)) {
-		list_add(&dquot->dq_dirty, &sb_dqopt(dquot->dq_sb)->
+		list_add(&dquot->dq_dirty, &dq_opt(dquot)->
 				info[dquot->dq_type].dqi_dirty_list);
 		ret = 0;
 	}
@@ -401,7 +401,7 @@ EXPORT_SYMBOL(mark_info_dirty);
 int dquot_acquire(struct dquot *dquot)
 {
 	int ret = 0, ret2 = 0;
-	struct quota_info *dqopt = sb_dqopt(dquot->dq_sb);
+	struct quota_info *dqopt = dq_opt(dquot);
 
 	mutex_lock(&dquot->dq_lock);
 	mutex_lock(&dqopt->dqio_mutex);
@@ -439,7 +439,7 @@ EXPORT_SYMBOL(dquot_acquire);
 int dquot_commit(struct dquot *dquot)
 {
 	int ret = 0, ret2 = 0;
-	struct quota_info *dqopt = sb_dqopt(dquot->dq_sb);
+	struct quota_info *dqopt = dq_opt(dquot);
 
 	mutex_lock(&dqopt->dqio_mutex);
 	spin_lock(&dq_list_lock);
@@ -471,7 +471,7 @@ EXPORT_SYMBOL(dquot_commit);
 int dquot_release(struct dquot *dquot)
 {
 	int ret = 0, ret2 = 0;
-	struct quota_info *dqopt = sb_dqopt(dquot->dq_sb);
+	struct quota_info *dqopt = dq_opt(dquot);
 
 	mutex_lock(&dquot->dq_lock);
 	/* Check whether we are not racing with some other dqget() */
@@ -1081,7 +1081,7 @@ void dquot_free_reserved_space(struct dquot *dquot, qsize_t number)
 
 static void dquot_decr_inodes(struct dquot *dquot, qsize_t number)
 {
-	if (sb_dqopt(dquot->dq_sb)->flags & DQUOT_NEGATIVE_USAGE ||
+	if (dq_opt(dquot)->flags & DQUOT_NEGATIVE_USAGE ||
 	    dquot->dq_dqb.dqb_curinodes >= number)
 		dquot->dq_dqb.dqb_curinodes -= number;
 	else
@@ -1093,7 +1093,7 @@ static void dquot_decr_inodes(struct dquot *dquot, qsize_t number)
 
 static void dquot_decr_space(struct dquot *dquot, qsize_t number)
 {
-	if (sb_dqopt(dquot->dq_sb)->flags & DQUOT_NEGATIVE_USAGE ||
+	if (dq_opt(dquot)->flags & DQUOT_NEGATIVE_USAGE ||
 	    dquot->dq_dqb.dqb_curspace >= number)
 		dquot->dq_dqb.dqb_curspace -= number;
 	else
@@ -1203,7 +1203,7 @@ static void flush_warnings(struct dquot *const *dquots, char *warntype)
 
 static int ignore_hardlimit(struct dquot *dquot)
 {
-	struct mem_dqinfo *info = &sb_dqopt(dquot->dq_sb)->info[dquot->dq_type];
+	struct mem_dqinfo *info = &dq_opt(dquot)->info[dquot->dq_type];
 
 	return capable(CAP_SYS_RESOURCE) &&
 	       (info->dqi_format->qf_fmt_id != QFMT_VFS_OLD ||
@@ -1241,7 +1241,7 @@ static int check_idq(struct dquot *dquot, qsize_t inodes, char *warntype)
 	    dquot->dq_dqb.dqb_itime == 0) {
 		*warntype = QUOTA_NL_ISOFTWARN;
 		dquot->dq_dqb.dqb_itime = get_seconds() +
-		    sb_dqopt(dquot->dq_sb)->info[dquot->dq_type].dqi_igrace;
+		    dq_opt(dquot)->info[dquot->dq_type].dqi_igrace;
 	}
 
 	return 0;
@@ -2331,7 +2331,7 @@ static int do_set_dqblk(struct dquot *dquot, struct fs_disk_quota *di)
 {
 	struct mem_dqblk *dm = &dquot->dq_dqb;
 	int check_blim = 0, check_ilim = 0;
-	struct mem_dqinfo *dqi = &sb_dqopt(dquot->dq_sb)->info[dquot->dq_type];
+	struct mem_dqinfo *dqi = &dq_opt(dquot)->info[dquot->dq_type];
 
 	if (di->d_fieldmask & ~VFS_FS_DQ_MASK)
 		return -EINVAL;
diff --git a/fs/quota/quota_tree.c b/fs/quota/quota_tree.c
index 9e48874..3eb95ec 100644
--- a/fs/quota/quota_tree.c
+++ b/fs/quota/quota_tree.c
@@ -596,7 +596,7 @@ int qtree_read_dquot(struct qtree_mem_dqinfo *info, struct dquot *dquot)
 
 #ifdef __QUOTA_QT_PARANOIA
 	/* Invalidated quota? */
-	if (!sb_dqopt(dquot->dq_sb)->files[type]) {
+	if (!dq_opt(dquot)->files[type]) {
 		quota_error(sb, "Quota invalidated while reading!");
 		return -EIO;
 	}
diff --git a/fs/quota/quota_v1.c b/fs/quota/quota_v1.c
index 34b37a6..c7ef325 100644
--- a/fs/quota/quota_v1.c
+++ b/fs/quota/quota_v1.c
@@ -57,7 +57,7 @@ static int v1_read_dqblk(struct dquot *dquot)
 	int type = dquot->dq_type;
 	struct v1_disk_dqblk dqblk;
 
-	if (!sb_dqopt(dquot->dq_sb)->files[type])
+	if (!dq_opt(dquot)->files[type])
 		return -EINVAL;
 
 	/* Set structure to 0s in case read fails/is after end of file */
@@ -85,12 +85,12 @@ static int v1_commit_dqblk(struct dquot *dquot)
 	v1_mem2disk_dqblk(&dqblk, &dquot->dq_dqb);
 	if (dquot->dq_id == 0) {
 		dqblk.dqb_btime =
-			sb_dqopt(dquot->dq_sb)->info[type].dqi_bgrace;
+			dq_opt(dquot)->info[type].dqi_bgrace;
 		dqblk.dqb_itime =
-			sb_dqopt(dquot->dq_sb)->info[type].dqi_igrace;
+			dq_opt(dquot)->info[type].dqi_igrace;
 	}
 	ret = 0;
-	if (sb_dqopt(dquot->dq_sb)->files[type])
+	if (dq_opt(dquot)->files[type])
 		ret = dquot->dq_sb->s_op->quota_write(dquot->dq_sb, type,
 			(char *)&dqblk, sizeof(struct v1_disk_dqblk),
 			v1_dqoff(dquot->dq_id));
diff --git a/include/linux/quota.h b/include/linux/quota.h
index 9a85412..00e1b3d 100644
--- a/include/linux/quota.h
+++ b/include/linux/quota.h
@@ -182,6 +182,7 @@ enum {
 
 #include <asm/atomic.h>
 
+
 typedef __kernel_uid32_t qid_t; /* Type in which we store ids in memory */
 typedef long long qsize_t;	/* Type in which we store sizes */
 
diff --git a/include/linux/quotaops.h b/include/linux/quotaops.h
index 9e09c9a..d81cbba 100644
--- a/include/linux/quotaops.h
+++ b/include/linux/quotaops.h
@@ -17,6 +17,10 @@ static inline struct quota_info *sb_dqopt(struct super_block *sb)
 {
 	return &sb->s_dquot;
 }
+static inline struct quota_info* dq_opt(struct dquot *dq)
+{
+	return sb_dqopt(dq->dq_sb);
+}
 
 /* i_mutex must being held */
 static inline bool is_quota_modification(struct inode *inode, struct iattr *ia)
-- 
1.6.6.1

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