linux-ext4 - [PATCH v1 06/22] debugfs: make stat command support inline data

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Message-Id: <1375436989-18948-7-git-send-email-wenqing.lz@taobao.com>
Date:	Fri,  2 Aug 2013 17:49:33 +0800
From:	Zheng Liu <gnehzuil.liu@...il.com>
To:	linux-ext4@...r.kernel.org
Cc:	Theodore Ts'o <tytso@....edu>, Zheng Liu <wenqing.lz@...bao.com>
Subject: [PATCH v1 06/22] debugfs: make stat command support inline data

From: Zheng Liu <wenqing.lz@...bao.com>

If there is an inode with inline data, we just print the size of inline
data in stat command.

Signed-off-by: Theodore Ts'o <tytso@....edu>
Signed-off-by: Zheng Liu <wenqing.lz@...bao.com>
---
 debugfs/debugfs.c        |   11 +++++++++++
 lib/ext2fs/ext2fs.h      |    1 +
 lib/ext2fs/inline_data.c |   27 +++++++++++++++++++++++++++
 3 files changed, 39 insertions(+)

diff --git a/debugfs/debugfs.c b/debugfs/debugfs.c
index 969dbe0..2837ee6 100644
--- a/debugfs/debugfs.c
+++ b/debugfs/debugfs.c
@@ -704,6 +704,15 @@ static void dump_extents(FILE *f, const char *prefix, ext2_ino_t ino,
 		fprintf(f, "\n");
 }
 
+static void dump_inline_data(FILE *out, const char *prefix, ext2_ino_t inode_num)
+{
+	int size;
+
+	fprintf(out, "%sINLINE DATA:\n %s", prefix, prefix);
+	size = ext2fs_inline_data_get_size(current_fs, inode_num);
+	fprintf(out, "  The size of inline data: %d", size);
+}
+
 void internal_dump_inode(FILE *out, const char *prefix,
 			 ext2_ino_t inode_num, struct ext2_inode *inode,
 			 int do_dump_blocks)
@@ -837,6 +846,8 @@ void internal_dump_inode(FILE *out, const char *prefix,
 		if (inode->i_flags & EXT4_EXTENTS_FL)
 			dump_extents(out, prefix, inode_num,
 				     DUMP_LEAF_EXTENTS|DUMP_NODE_EXTENTS, 0, 0);
+		else if (inode->i_flags & EXT4_INLINE_DATA_FL)
+			dump_inline_data(out, prefix, inode_num);
 		else
 			dump_blocks(out, prefix, inode_num);
 	}
diff --git a/lib/ext2fs/ext2fs.h b/lib/ext2fs/ext2fs.h
index 7b05b48..6e3bf6e 100644
--- a/lib/ext2fs/ext2fs.h
+++ b/lib/ext2fs/ext2fs.h
@@ -1344,6 +1344,7 @@ extern errcode_t ext2fs_get_memalign(unsigned long size,
 
 /* inline_data.c */
 extern int ext2fs_inode_has_inline_data(ext2_filsys fs, ext2_ino_t ino);
+extern int ext2fs_inline_data_get_size(ext2_filsys fs, ext2_ino_t ino);
 extern errcode_t ext2fs_inline_data_iterate(ext2_filsys fs,
 				      ext2_ino_t ino,
 				      int flags,
diff --git a/lib/ext2fs/inline_data.c b/lib/ext2fs/inline_data.c
index 922c959..1220418 100644
--- a/lib/ext2fs/inline_data.c
+++ b/lib/ext2fs/inline_data.c
@@ -80,6 +80,33 @@ int ext2fs_inode_has_inline_data(ext2_filsys fs, ext2_ino_t ino)
 	return (inode.i_flags & EXT4_INLINE_DATA_FL);
 }
 
+int ext2fs_inline_data_get_size(ext2_filsys fs, ext2_ino_t ino)
+{
+	struct ext2_inode_large *inode;
+	struct inline_data data;
+	errcode_t retval = 0;
+	int size = 0;
+
+	retval = ext2fs_get_mem(EXT2_INODE_SIZE(fs->super), &inode);
+	if (retval)
+		return 0;
+	retval = ext2fs_read_inode_full(fs, ino, (void *)inode,
+					EXT2_INODE_SIZE(fs->super));
+	if (retval)
+		goto out;
+
+	if (inode->i_flags & EXT4_INLINE_DATA_FL) {
+		retval = ext2fs_inline_data_find(fs, inode, &data);
+		if (retval)
+			goto out;
+		size = data.inline_size;
+	}
+
+out:
+	ext2fs_free_mem(&inode);
+	return size;
+}
+
 errcode_t ext2fs_inline_data_iterate(ext2_filsys fs,
 			       ext2_ino_t ino,
 			       int flags,
-- 
1.7.9.7

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