linux-kernel - [PATCH v2 2/4] ext2: introduce flag argument for ext2_new

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Message-ID: <20230815112612.221145-3-yebin10@huawei.com>
Date:   Tue, 15 Aug 2023 19:26:10 +0800
From:   Ye Bin <yebin10@...wei.com>
To:     <jack@...e.cz>, <linux-ext4@...r.kernel.org>
CC:     <linux-kernel@...r.kernel.org>, Ye Bin <yebin10@...wei.com>
Subject: [PATCH v2 2/4] ext2: introduce flag argument for ext2_new_blocks()

This patch introduce introduce flag argument for ext2_new_blocks(), and also
introduce EXT2_ALLOC_NORESERVE flags.

Signed-off-by: Ye Bin <yebin10@...wei.com>
---
 fs/ext2/balloc.c | 3 ++-
 fs/ext2/ext2.h   | 7 ++++++-
 fs/ext2/inode.c  | 2 +-
 fs/ext2/xattr.c  | 2 +-
 4 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/fs/ext2/balloc.c b/fs/ext2/balloc.c
index c8515fc501ec..99a19f2ecd6f 100644
--- a/fs/ext2/balloc.c
+++ b/fs/ext2/balloc.c
@@ -1193,6 +1193,7 @@ int ext2_data_block_valid(struct ext2_sb_info *sbi, ext2_fsblk_t start_blk,
  * @goal:		given target block(filesystem wide)
  * @count:		target number of blocks to allocate
  * @errp:		error code
+ * @flag                allocate flags
  *
  * ext2_new_blocks uses a goal block to assist allocation.  If the goal is
  * free, or there is a free block within 32 blocks of the goal, that block
@@ -1202,7 +1203,7 @@ int ext2_data_block_valid(struct ext2_sb_info *sbi, ext2_fsblk_t start_blk,
  * This function also updates quota and i_blocks field.
  */
 ext2_fsblk_t ext2_new_blocks(struct inode *inode, ext2_fsblk_t goal,
-		    unsigned long *count, int *errp)
+		    unsigned long *count, int *errp, unsigned int flag)
 {
 	struct buffer_head *bitmap_bh = NULL;
 	struct buffer_head *gdp_bh;
diff --git a/fs/ext2/ext2.h b/fs/ext2/ext2.h
index 954fb82ab22c..36c8ed5dd0a0 100644
--- a/fs/ext2/ext2.h
+++ b/fs/ext2/ext2.h
@@ -398,6 +398,11 @@ struct ext2_inode {
 #define EXT2_ERRORS_PANIC		3	/* Panic */
 #define EXT2_ERRORS_DEFAULT		EXT2_ERRORS_CONTINUE
 
+/*
+ * Behaviour if use reservation window in ext2_new_blocks()
+ */
+#define EXT2_ALLOC_NORESERVE            0x1
+
 /*
  * Structure of the super block
  */
@@ -696,7 +701,7 @@ static inline struct ext2_inode_info *EXT2_I(struct inode *inode)
 extern int ext2_bg_has_super(struct super_block *sb, int group);
 extern unsigned long ext2_bg_num_gdb(struct super_block *sb, int group);
 extern ext2_fsblk_t ext2_new_blocks(struct inode *, unsigned long,
-				unsigned long *, int *);
+				unsigned long *, int *, unsigned int);
 extern int ext2_data_block_valid(struct ext2_sb_info *sbi, ext2_fsblk_t start_blk,
 				 unsigned int count);
 extern void ext2_free_blocks (struct inode *, unsigned long,
diff --git a/fs/ext2/inode.c b/fs/ext2/inode.c
index acbab27fe957..462b4e873dc7 100644
--- a/fs/ext2/inode.c
+++ b/fs/ext2/inode.c
@@ -415,7 +415,7 @@ static int ext2_alloc_blocks(struct inode *inode,
 	while (1) {
 		count = target;
 		/* allocating blocks for indirect blocks and direct blocks */
-		current_block = ext2_new_blocks(inode,goal,&count,err);
+		current_block = ext2_new_blocks(inode, goal, &count, err, 0);
 		if (*err)
 			goto failed_out;
 
diff --git a/fs/ext2/xattr.c b/fs/ext2/xattr.c
index e9546cc65db2..e076386a26f4 100644
--- a/fs/ext2/xattr.c
+++ b/fs/ext2/xattr.c
@@ -744,7 +744,7 @@ ext2_xattr_set2(struct inode *inode, struct buffer_head *old_bh,
 						EXT2_I(inode)->i_block_group);
 			unsigned long count = 1;
 			int block = ext2_new_blocks(inode, goal, &count,
-						    &error);
+						    &error, 0);
 			if (error)
 				goto cleanup;
 			ea_idebug(inode, "creating block %d", block);
-- 
2.31.1