dquot: cleanup inode allocation / freeing routines

Get rid of the alloc_inode and free_inode dquot operations - they are
always called from the filesystem and if a filesystem really needs
their own (which none currently does) it can just call into it's
own routine directly.

Also get rid of the vfs_dq_alloc/vfs_dq_free wrappers and always
call the lowlevel dquot_alloc_inode / dqout_free_inode routines
directly, which now lose the number argument which is always 1.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jan Kara <jack@suse.cz>

Documentation/filesystems/Locking

@@ -462,8 +462,6 @@ in sys_read() and friends.
 prototypes:
 	int (*initialize) (struct inode *, int);
 	int (*drop) (struct inode *);
-	int (*alloc_inode) (const struct inode *, unsigned long);
-	int (*free_inode) (const struct inode *, unsigned long);
 	int (*transfer) (struct inode *, struct iattr *);
 	int (*write_dquot) (struct dquot *);
 	int (*acquire_dquot) (struct dquot *);
@@ -479,8 +477,6 @@ What filesystem should expect from the generic quota functions:
 		FS recursion	Held locks when called
 initialize:	yes		maybe dqonoff_sem
 drop:		yes		-
-alloc_inode:	->mark_dirty()	-
-free_inode:	->mark_dirty()	-
 transfer:	yes		-
 write_dquot:	yes		dqonoff_sem or dqptr_sem
 acquire_dquot:	yes		dqonoff_sem or dqptr_sem
@@ -491,10 +487,6 @@ write_info:	yes		dqonoff_sem
 FS recursion means calling ->quota_read() and ->quota_write() from superblock
 operations.
 
-->alloc_inode(), ->free_inode() are called
-only directly by the filesystem and do not call any fs functions only
-the ->mark_dirty() operation.
-
 More details about quota locking can be found in fs/dquot.c.
 
 --------------------------- vm_operations_struct -----------------------------

fs/ext2/ialloc.c

@@ -121,7 +121,7 @@ void ext2_free_inode (struct inode * inode)
 	if (!is_bad_inode(inode)) {
 		/* Quota is already initialized in iput() */
 		ext2_xattr_delete_inode(inode);
-		vfs_dq_free_inode(inode);
+		dquot_free_inode(inode);
 		vfs_dq_drop(inode);
 	}
 
@@ -586,10 +586,10 @@ struct inode *ext2_new_inode(struct inode *dir, int mode)
 		goto fail_drop;
 	}
 
-	if (vfs_dq_alloc_inode(inode)) {
-		err = -EDQUOT;
+	vfs_dq_init(inode);
+	err = dquot_alloc_inode(inode);
+	if (err)
 		goto fail_drop;
-	}
 
 	err = ext2_init_acl(inode, dir);
 	if (err)
@@ -605,7 +605,7 @@ struct inode *ext2_new_inode(struct inode *dir, int mode)
 	return inode;
 
 fail_free_drop:
-	vfs_dq_free_inode(inode);
+	dquot_free_inode(inode);
 
 fail_drop:
 	vfs_dq_drop(inode);

fs/ext3/ialloc.c

@@ -125,7 +125,7 @@ void ext3_free_inode (handle_t *handle, struct inode * inode)
 	 */
 	vfs_dq_init(inode);
 	ext3_xattr_delete_inode(handle, inode);
-	vfs_dq_free_inode(inode);
+	dquot_free_inode(inode);
 	vfs_dq_drop(inode);
 
 	is_directory = S_ISDIR(inode->i_mode);
@@ -588,10 +588,10 @@ struct inode *ext3_new_inode(handle_t *handle, struct inode * dir, int mode)
 		sizeof(struct ext3_inode) - EXT3_GOOD_OLD_INODE_SIZE : 0;
 
 	ret = inode;
-	if (vfs_dq_alloc_inode(inode)) {
-		err = -EDQUOT;
+	vfs_dq_init(inode);
+	err = dquot_alloc_inode(inode);
+	if (err)
 		goto fail_drop;
-	}
 
 	err = ext3_init_acl(handle, inode, dir);
 	if (err)
@@ -619,7 +619,7 @@ struct inode *ext3_new_inode(handle_t *handle, struct inode * dir, int mode)
 	return ret;
 
 fail_free_drop:
-	vfs_dq_free_inode(inode);
+	dquot_free_inode(inode);
 
 fail_drop:
 	vfs_dq_drop(inode);

fs/ext3/super.c

@@ -752,8 +752,6 @@ static ssize_t ext3_quota_write(struct super_block *sb, int type,
 static const struct dquot_operations ext3_quota_operations = {
 	.initialize	= dquot_initialize,
 	.drop		= dquot_drop,
-	.alloc_inode	= dquot_alloc_inode,
-	.free_inode	= dquot_free_inode,
 	.transfer	= dquot_transfer,
 	.write_dquot	= ext3_write_dquot,
 	.acquire_dquot	= ext3_acquire_dquot,

fs/ext4/ialloc.c

@@ -219,7 +219,7 @@ void ext4_free_inode(handle_t *handle, struct inode *inode)
 	 */
 	vfs_dq_init(inode);
 	ext4_xattr_delete_inode(handle, inode);
-	vfs_dq_free_inode(inode);
+	dquot_free_inode(inode);
 	vfs_dq_drop(inode);
 
 	is_directory = S_ISDIR(inode->i_mode);
@@ -1034,10 +1034,10 @@ struct inode *ext4_new_inode(handle_t *handle, struct inode *dir, int mode,
 	ei->i_extra_isize = EXT4_SB(sb)->s_want_extra_isize;
 
 	ret = inode;
-	if (vfs_dq_alloc_inode(inode)) {
-		err = -EDQUOT;
+	vfs_dq_init(inode);
+	err = dquot_alloc_inode(inode);
+	if (err)
 		goto fail_drop;
-	}
 
 	err = ext4_init_acl(handle, inode, dir);
 	if (err)
@@ -1074,7 +1074,7 @@ struct inode *ext4_new_inode(handle_t *handle, struct inode *dir, int mode,
 	return ret;
 
 fail_free_drop:
-	vfs_dq_free_inode(inode);
+	dquot_free_inode(inode);
 
 fail_drop:
 	vfs_dq_drop(inode);

fs/ext4/super.c

@@ -1017,8 +1017,6 @@ static const struct dquot_operations ext4_quota_operations = {
 #ifdef CONFIG_QUOTA
 	.get_reserved_space = ext4_get_reserved_space,
 #endif
-	.alloc_inode	= dquot_alloc_inode,
-	.free_inode	= dquot_free_inode,
 	.transfer	= dquot_transfer,
 	.write_dquot	= ext4_write_dquot,
 	.acquire_dquot	= ext4_acquire_dquot,

fs/jfs/inode.c

@@ -159,7 +159,7 @@ void jfs_delete_inode(struct inode *inode)
 		 * Free the inode from the quota allocation.
 		 */
 		vfs_dq_init(inode);
-		vfs_dq_free_inode(inode);
+		dquot_free_inode(inode);
 		vfs_dq_drop(inode);
 	}
 

fs/jfs/jfs_inode.c

@@ -116,10 +116,10 @@ struct inode *ialloc(struct inode *parent, umode_t mode)
 	/*
 	 * Allocate inode to quota.
 	 */
-	if (vfs_dq_alloc_inode(inode)) {
-		rc = -EDQUOT;
+	vfs_dq_init(inode);
+	rc = dquot_alloc_inode(inode);
+	if (rc)
 		goto fail_drop;
-	}
 
 	inode->i_mode = mode;
 	/* inherit flags from parent */

fs/ocfs2/inode.c

@@ -665,7 +665,7 @@ static int ocfs2_remove_inode(struct inode *inode,
 	}
 
 	ocfs2_remove_from_cache(INODE_CACHE(inode), di_bh);
-	vfs_dq_free_inode(inode);
+	dquot_free_inode(inode);
 
 	status = ocfs2_free_dinode(handle, inode_alloc_inode,
 				   inode_alloc_bh, di);

fs/ocfs2/namei.c

@@ -348,13 +348,9 @@ static int ocfs2_mknod(struct inode *dir,
 		goto leave;
 	}
 
-	/* We don't use standard VFS wrapper because we don't want vfs_dq_init
-	 * to be called. */
-	if (sb_any_quota_active(osb->sb) &&
-	    osb->sb->dq_op->alloc_inode(inode, 1) == NO_QUOTA) {
-		status = -EDQUOT;
+	status = dquot_alloc_inode(inode);
+	if (status)
 		goto leave;
-	}
 	did_quota_inode = 1;
 
 	mlog_entry("(0x%p, 0x%p, %d, %lu, '%.*s')\n", dir, dentry,
@@ -431,7 +427,7 @@ static int ocfs2_mknod(struct inode *dir,
 	status = 0;
 leave:
 	if (status < 0 && did_quota_inode)
-		vfs_dq_free_inode(inode);
+		dquot_free_inode(inode);
 	if (handle)
 		ocfs2_commit_trans(osb, handle);
 
@@ -1688,13 +1684,9 @@ static int ocfs2_symlink(struct inode *dir,
 		goto bail;
 	}
 
-	/* We don't use standard VFS wrapper because we don't want vfs_dq_init
-	 * to be called. */
-	if (sb_any_quota_active(osb->sb) &&
-	    osb->sb->dq_op->alloc_inode(inode, 1) == NO_QUOTA) {
-		status = -EDQUOT;
+	status = dquot_alloc_inode(inode);
+	if (status)
 		goto bail;
-	}
 	did_quota_inode = 1;
 
 	mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", dir, dentry,
@@ -1790,7 +1782,7 @@ static int ocfs2_symlink(struct inode *dir,
 		dquot_free_space_nodirty(inode,
 					ocfs2_clusters_to_bytes(osb->sb, 1));
 	if (status < 0 && did_quota_inode)
-		vfs_dq_free_inode(inode);
+		dquot_free_inode(inode);
 	if (handle)
 		ocfs2_commit_trans(osb, handle);
 
@@ -2098,13 +2090,9 @@ int ocfs2_create_inode_in_orphan(struct inode *dir,
 		goto leave;
 	}
 
-	/* We don't use standard VFS wrapper because we don't want vfs_dq_init
-	 * to be called. */
-	if (sb_any_quota_active(osb->sb) &&
-	    osb->sb->dq_op->alloc_inode(inode, 1) == NO_QUOTA) {
-		status = -EDQUOT;
+	status = dquot_alloc_inode(inode);
+	if (status)
 		goto leave;
-	}
 	did_quota_inode = 1;
 
 	inode->i_nlink = 0;
@@ -2139,7 +2127,7 @@ int ocfs2_create_inode_in_orphan(struct inode *dir,
 	insert_inode_hash(inode);
 leave:
 	if (status < 0 && did_quota_inode)
-		vfs_dq_free_inode(inode);
+		dquot_free_inode(inode);
 	if (handle)
 		ocfs2_commit_trans(osb, handle);
 

fs/ocfs2/quota_global.c

@@ -853,8 +853,6 @@ static void ocfs2_destroy_dquot(struct dquot *dquot)
 const struct dquot_operations ocfs2_quota_operations = {
 	.initialize	= dquot_initialize,
 	.drop		= dquot_drop,
-	.alloc_inode	= dquot_alloc_inode,
-	.free_inode	= dquot_free_inode,
 	.transfer	= dquot_transfer,
 	.write_dquot	= ocfs2_write_dquot,
 	.acquire_dquot	= ocfs2_acquire_dquot,

fs/quota/dquot.c

@@ -1531,15 +1531,15 @@ EXPORT_SYMBOL(__dquot_alloc_space);
 /*
  * This operation can block, but only after everything is updated
  */
-int dquot_alloc_inode(const struct inode *inode, qsize_t number)
+int dquot_alloc_inode(const struct inode *inode)
 {
-	int cnt, ret = NO_QUOTA;
+	int cnt, ret = -EDQUOT;
 	char warntype[MAXQUOTAS];
 
 	/* First test before acquiring mutex - solves deadlocks when we
          * re-enter the quota code and are already holding the mutex */
-	if (IS_NOQUOTA(inode))
-		return QUOTA_OK;
+	if (!sb_any_quota_active(inode->i_sb) || IS_NOQUOTA(inode))
+		return 0;
 	for (cnt = 0; cnt < MAXQUOTAS; cnt++)
 		warntype[cnt] = QUOTA_NL_NOWARN;
 	down_read(&sb_dqopt(inode->i_sb)->dqptr_sem);
@@ -1547,7 +1547,7 @@ int dquot_alloc_inode(const struct inode *inode, qsize_t number)
 	for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
 		if (!inode->i_dquot[cnt])
 			continue;
-		if (check_idq(inode->i_dquot[cnt], number, warntype+cnt)
+		if (check_idq(inode->i_dquot[cnt], 1, warntype+cnt)
 		    == NO_QUOTA)
 			goto warn_put_all;
 	}
@@ -1555,12 +1555,12 @@ int dquot_alloc_inode(const struct inode *inode, qsize_t number)
 	for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
 		if (!inode->i_dquot[cnt])
 			continue;
-		dquot_incr_inodes(inode->i_dquot[cnt], number);
+		dquot_incr_inodes(inode->i_dquot[cnt], 1);
 	}
-	ret = QUOTA_OK;
+	ret = 0;
 warn_put_all:
 	spin_unlock(&dq_data_lock);
-	if (ret == QUOTA_OK)
+	if (ret == 0)
 		mark_all_dquot_dirty(inode->i_dquot);
 	flush_warnings(inode->i_dquot, warntype);
 	up_read(&sb_dqopt(inode->i_sb)->dqptr_sem);
@@ -1638,29 +1638,28 @@ EXPORT_SYMBOL(__dquot_free_space);
 /*
  * This operation can block, but only after everything is updated
  */
-int dquot_free_inode(const struct inode *inode, qsize_t number)
+void dquot_free_inode(const struct inode *inode)
 {
 	unsigned int cnt;
 	char warntype[MAXQUOTAS];
 
 	/* First test before acquiring mutex - solves deadlocks when we
          * re-enter the quota code and are already holding the mutex */
-	if (IS_NOQUOTA(inode))
-		return QUOTA_OK;
+	if (!sb_any_quota_active(inode->i_sb) || IS_NOQUOTA(inode))
+		return;
 
 	down_read(&sb_dqopt(inode->i_sb)->dqptr_sem);
 	spin_lock(&dq_data_lock);
 	for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
 		if (!inode->i_dquot[cnt])
 			continue;
-		warntype[cnt] = info_idq_free(inode->i_dquot[cnt], number);
-		dquot_decr_inodes(inode->i_dquot[cnt], number);
+		warntype[cnt] = info_idq_free(inode->i_dquot[cnt], 1);
+		dquot_decr_inodes(inode->i_dquot[cnt], 1);
 	}
 	spin_unlock(&dq_data_lock);
 	mark_all_dquot_dirty(inode->i_dquot);
 	flush_warnings(inode->i_dquot, warntype);
 	up_read(&sb_dqopt(inode->i_sb)->dqptr_sem);
-	return QUOTA_OK;
 }
 EXPORT_SYMBOL(dquot_free_inode);
 
@@ -1815,8 +1814,6 @@ EXPORT_SYMBOL(dquot_commit_info);
 const struct dquot_operations dquot_operations = {
 	.initialize	= dquot_initialize,
 	.drop		= dquot_drop,
-	.alloc_inode	= dquot_alloc_inode,
-	.free_inode	= dquot_free_inode,
 	.transfer	= dquot_transfer,
 	.write_dquot	= dquot_commit,
 	.acquire_dquot	= dquot_acquire,

fs/reiserfs/inode.c

@@ -54,7 +54,7 @@ void reiserfs_delete_inode(struct inode *inode)
 		 * after delete_object so that quota updates go into the same transaction as
 		 * stat data deletion */
 		if (!err) 
-			vfs_dq_free_inode(inode);
+			dquot_free_inode(inode);
 
 		if (journal_end(&th, inode->i_sb, jbegin_count))
 			goto out;
@@ -1765,10 +1765,10 @@ int reiserfs_new_inode(struct reiserfs_transaction_handle *th,
 
 	BUG_ON(!th->t_trans_id);
 
-	if (vfs_dq_alloc_inode(inode)) {
-		err = -EDQUOT;
+	vfs_dq_init(inode);
+	err = dquot_alloc_inode(inode);
+	if (err)
 		goto out_end_trans;
-	}
 	if (!dir->i_nlink) {
 		err = -EPERM;
 		goto out_bad_inode;
@@ -1959,7 +1959,7 @@ int reiserfs_new_inode(struct reiserfs_transaction_handle *th,
 	INODE_PKEY(inode)->k_objectid = 0;
 
 	/* Quota change must be inside a transaction for journaling */
-	vfs_dq_free_inode(inode);
+	dquot_free_inode(inode);
 
       out_end_trans:
 	journal_end(th, th->t_super, th->t_blocks_allocated);

fs/reiserfs/super.c

@@ -618,8 +618,6 @@ static int reiserfs_quota_on(struct super_block *, int, int, char *, int);
 static const struct dquot_operations reiserfs_quota_operations = {
 	.initialize = dquot_initialize,
 	.drop = dquot_drop,
-	.alloc_inode = dquot_alloc_inode,
-	.free_inode = dquot_free_inode,
 	.transfer = dquot_transfer,
 	.write_dquot = reiserfs_write_dquot,
 	.acquire_dquot = reiserfs_acquire_dquot,

fs/udf/ialloc.c

@@ -36,7 +36,7 @@ void udf_free_inode(struct inode *inode)
 	 * Note: we must free any quota before locking the superblock,
 	 * as writing the quota to disk may need the lock as well.
 	 */
-	vfs_dq_free_inode(inode);
+	dquot_free_inode(inode);
 	vfs_dq_drop(inode);
 
 	clear_inode(inode);
@@ -61,7 +61,7 @@ struct inode *udf_new_inode(struct inode *dir, int mode, int *err)
 	struct super_block *sb = dir->i_sb;
 	struct udf_sb_info *sbi = UDF_SB(sb);
 	struct inode *inode;
-	int block;
+	int block, ret;
 	uint32_t start = UDF_I(dir)->i_location.logicalBlockNum;
 	struct udf_inode_info *iinfo;
 	struct udf_inode_info *dinfo = UDF_I(dir);
@@ -153,12 +153,14 @@ struct inode *udf_new_inode(struct inode *dir, int mode, int *err)
 	insert_inode_hash(inode);
 	mark_inode_dirty(inode);
 
-	if (vfs_dq_alloc_inode(inode)) {
+	vfs_dq_init(inode);
+	ret = dquot_alloc_inode(inode);
+	if (ret) {
 		vfs_dq_drop(inode);
 		inode->i_flags |= S_NOQUOTA;
 		inode->i_nlink = 0;
 		iput(inode);
-		*err = -EDQUOT;
+		*err = ret;
 		return NULL;
 	}
 

fs/ufs/ialloc.c

@@ -95,7 +95,7 @@ void ufs_free_inode (struct inode * inode)
 
 	is_directory = S_ISDIR(inode->i_mode);
 
-	vfs_dq_free_inode(inode);
+	dquot_free_inode(inode);
 	vfs_dq_drop(inode);
 
 	clear_inode (inode);
@@ -355,9 +355,10 @@ struct inode * ufs_new_inode(struct inode * dir, int mode)
 
 	unlock_super (sb);
 
-	if (vfs_dq_alloc_inode(inode)) {
+	vfs_dq_init(inode);
+	err = dquot_alloc_inode(inode);
+	if (err) {
 		vfs_dq_drop(inode);
-		err = -EDQUOT;
 		goto fail_without_unlock;
 	}
 

include/linux/quota.h

@@ -297,8 +297,6 @@ struct quota_format_ops {
 struct dquot_operations {
 	int (*initialize) (struct inode *, int);
 	int (*drop) (struct inode *);
-	int (*alloc_inode) (const struct inode *, qsize_t);
-	int (*free_inode) (const struct inode *, qsize_t);
 	int (*transfer) (struct inode *, qid_t *, unsigned long);
 	int (*write_dquot) (struct dquot *);		/* Ordinary dquot write */
 	struct dquot *(*alloc_dquot)(struct super_block *, int);	/* Allocate memory for new dquot */

include/linux/quotaops.h

@@ -37,10 +37,10 @@ int __dquot_alloc_space(struct inode *inode, qsize_t number,
 		int warn, int reserve);
 void __dquot_free_space(struct inode *inode, qsize_t number, int reserve);
 
-int dquot_alloc_inode(const struct inode *inode, qsize_t number);
+int dquot_alloc_inode(const struct inode *inode);
 
 int dquot_claim_space_nodirty(struct inode *inode, qsize_t number);
-int dquot_free_inode(const struct inode *inode, qsize_t number);
+void dquot_free_inode(const struct inode *inode);
 
 int dquot_transfer(struct inode *inode, qid_t *chid, unsigned long mask);
 int dquot_commit(struct dquot *dquot);
@@ -148,22 +148,6 @@ static inline void vfs_dq_init(struct inode *inode)
 		inode->i_sb->dq_op->initialize(inode, -1);
 }
 
-static inline int vfs_dq_alloc_inode(struct inode *inode)
-{
-	if (sb_any_quota_active(inode->i_sb)) {
-		vfs_dq_init(inode);
-		if (inode->i_sb->dq_op->alloc_inode(inode, 1) == NO_QUOTA)
-			return 1;
-	}
-	return 0;
-}
-
-static inline void vfs_dq_free_inode(struct inode *inode)
-{
-	if (sb_any_quota_active(inode->i_sb))
-		inode->i_sb->dq_op->free_inode(inode, 1);
-}
-
 /* Cannot be called inside a transaction */
 static inline int vfs_dq_off(struct super_block *sb, int remount)
 {
@@ -231,12 +215,12 @@ static inline void vfs_dq_drop(struct inode *inode)
 {
 }
 
-static inline int vfs_dq_alloc_inode(struct inode *inode)
+static inline int dquot_alloc_inode(const struct inode *inode)
 {
 	return 0;
 }
 
-static inline void vfs_dq_free_inode(struct inode *inode)
+static inline void dquot_free_inode(const struct inode *inode)
 {
 }