From: Qu Wenruo <quwenruo@cn.fujitsu.com>
Date: Mon, 10 Oct 2016 02:30:34 +0000 (+0800)
Subject: btrfs-progs: convert: Convert ext inode flags to btrfs inode flags
X-Git-Tag: upstream/4.16.1~1189
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=8570a0c3a4f681bc5ae1f04c56730bea8fb6cdc9;p=platform%2Fupstream%2Fbtrfs-progs.git

btrfs-progs: convert: Convert ext inode flags to btrfs inode flags

Before this patch, btrfs-convert never copy ext* inode flags to
corresponding btrfs inode flags.

This makes common flags like APPEND/SYNC/SYNCDIR/IMMUTABLE not copied to
btrfs inode.

This patch introduces ext2_convert_inode_flags() function to handle the
convert, so btrfs-convert can copy as many inode flags as possible.

Reported-by: Lakshmipathi.G <lakshmipathi.g@gmail.com>
Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
---

diff --git a/btrfs-convert.c b/btrfs-convert.c
index 542179e..2bcc16c 100644
--- a/btrfs-convert.c
+++ b/btrfs-convert.c
@@ -2201,6 +2201,31 @@ static int ext2_check_state(struct btrfs_convert_context *cctx)
 		return 0;
 }
 
+/* EXT2_*_FL to BTRFS_INODE_FLAG_* stringification helper */
+#define COPY_ONE_EXT2_FLAG(flags, ext2_inode, name) ({			\
+	if (ext2_inode->i_flags & EXT2_##name##_FL)			\
+		flags |= BTRFS_INODE_##name;				\
+})
+
+/*
+ * Convert EXT2_*_FL to corresponding BTRFS_INODE_* flags
+ *
+ * Only a subset of EXT_*_FL is supported in btrfs.
+ */
+static void ext2_convert_inode_flags(struct btrfs_inode_item *dst,
+				     struct ext2_inode *src)
+{
+	u64 flags = 0;
+
+	COPY_ONE_EXT2_FLAG(flags, src, APPEND);
+	COPY_ONE_EXT2_FLAG(flags, src, SYNC);
+	COPY_ONE_EXT2_FLAG(flags, src, IMMUTABLE);
+	COPY_ONE_EXT2_FLAG(flags, src, NODUMP);
+	COPY_ONE_EXT2_FLAG(flags, src, NOATIME);
+	COPY_ONE_EXT2_FLAG(flags, src, DIRSYNC);
+	btrfs_set_stack_inode_flags(dst, flags);
+}
+
 /*
  * copy a single inode. do all the required works, such as cloning
  * inode item, creating file extents and creating directory entries.
@@ -2223,6 +2248,7 @@ static int ext2_copy_single_inode(struct btrfs_trans_handle *trans,
 			    BTRFS_INODE_NODATASUM;
 		btrfs_set_stack_inode_flags(&btrfs_inode, flags);
 	}
+	ext2_convert_inode_flags(&btrfs_inode, ext2_inode);
 
 	switch (ext2_inode->i_mode & S_IFMT) {
 	case S_IFREG: