| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-Id: <1386323897-2354-16-git-send-email-wenqing.lz@taobao.com>
Date: Fri, 6 Dec 2013 17:58:02 +0800
From: Zheng Liu <gnehzuil.liu@...il.com>
To: linux-ext4@...r.kernel.org
Cc: Theodore Ts'o <tytso@....edu>,
"Darrick J. Wong" <darrick.wong@...cle.com>,
Zheng Liu <wenqing.lz@...bao.com>
Subject: [PATCH v3 15/30] debugfs: make mkdir command support inline data
From: Zheng Liu <wenqing.lz@...bao.com>
This commit tries to make mkdir command in debugfs support inline data.
Signed-off-by: Zheng Liu <wenqing.lz@...bao.com>
---
lib/ext2fs/ext2fs.h | 2 ++
lib/ext2fs/ext2fsP.h | 1 +
lib/ext2fs/inline_data.c | 10 ++++++
lib/ext2fs/mkdir.c | 77 +++++++++++++++++++++++++++++++++-------------
lib/ext2fs/newdir.c | 25 +++++++++++++++
5 files changed, 93 insertions(+), 22 deletions(-)
diff --git a/lib/ext2fs/ext2fs.h b/lib/ext2fs/ext2fs.h
index 1a267e2..322c39d 100644
--- a/lib/ext2fs/ext2fs.h
+++ b/lib/ext2fs/ext2fs.h
@@ -1445,6 +1445,8 @@ int ext2fs_native_flag(void);
/* newdir.c */
extern errcode_t ext2fs_new_dir_block(ext2_filsys fs, ext2_ino_t dir_ino,
ext2_ino_t parent_ino, char **block);
+extern errcode_t ext2fs_new_dir_inline_data(ext2_filsys fs, ext2_ino_t dir_ino,
+ ext2_ino_t parent_ino, __u32 *iblock);
/* mkdir.c */
extern errcode_t ext2fs_mkdir(ext2_filsys fs, ext2_ino_t parent, ext2_ino_t inum,
diff --git a/lib/ext2fs/ext2fsP.h b/lib/ext2fs/ext2fsP.h
index 4dfa983..b2da21a 100644
--- a/lib/ext2fs/ext2fsP.h
+++ b/lib/ext2fs/ext2fsP.h
@@ -88,6 +88,7 @@ extern int ext2fs_process_dir_block(ext2_filsys fs,
int ref_offset,
void *priv_data);
+extern errcode_t ext2fs_inline_data_init(ext2_filsys fs, ext2_ino_t ino);
extern errcode_t ext2fs_inline_data_size(ext2_filsys fs, ext2_ino_t ino,
size_t *size);
extern errcode_t ext2fs_inline_data_expand(ext2_filsys fs, ext2_ino_t ino);
diff --git a/lib/ext2fs/inline_data.c b/lib/ext2fs/inline_data.c
index 4294a5e..3144427 100644
--- a/lib/ext2fs/inline_data.c
+++ b/lib/ext2fs/inline_data.c
@@ -77,6 +77,16 @@ err:
return retval;
}
+errcode_t ext2fs_inline_data_init(ext2_filsys fs, ext2_ino_t ino)
+{
+ struct ext2_inline_data data;
+
+ data.fs = fs;
+ data.ino = ino;
+ data.ea_size = 0;
+ data.ea_data = "";
+ return ext2fs_inline_data_ea_set(&data);
+}
errcode_t ext2fs_inline_data_size(ext2_filsys fs, ext2_ino_t ino, size_t *size)
{
diff --git a/lib/ext2fs/mkdir.c b/lib/ext2fs/mkdir.c
index 4a85439..06c2c7e 100644
--- a/lib/ext2fs/mkdir.c
+++ b/lib/ext2fs/mkdir.c
@@ -41,10 +41,20 @@ errcode_t ext2fs_mkdir(ext2_filsys fs, ext2_ino_t parent, ext2_ino_t inum,
ext2_ino_t scratch_ino;
blk64_t blk;
char *block = 0;
+ int inline_data = 0;
EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
/*
+ * Create a new dir with inline data iff this feature is enabled
+ * and ino >= EXT2_FIRST_INO.
+ */
+ if ((!ino || ino >= EXT2_FIRST_INO(fs->super)) &&
+ EXT2_HAS_INCOMPAT_FEATURE(fs->super,
+ EXT4_FEATURE_INCOMPAT_INLINE_DATA))
+ inline_data = 1;
+
+ /*
* Allocate an inode, if necessary
*/
if (!ino) {
@@ -57,14 +67,21 @@ errcode_t ext2fs_mkdir(ext2_filsys fs, ext2_ino_t parent, ext2_ino_t inum,
/*
* Allocate a data block for the directory
*/
- retval = ext2fs_new_block2(fs, 0, 0, &blk);
- if (retval)
- goto cleanup;
+ if (!inline_data) {
+ retval = ext2fs_new_block2(fs, 0, 0, &blk);
+ if (retval)
+ goto cleanup;
+ }
/*
* Create a scratch template for the directory
*/
- retval = ext2fs_new_dir_block(fs, ino, parent, &block);
+ memset(&inode, 0, sizeof(struct ext2_inode));
+ if (inline_data)
+ retval = ext2fs_new_dir_inline_data(fs, ino, parent,
+ inode.i_block);
+ else
+ retval = ext2fs_new_dir_block(fs, ino, parent, &block);
if (retval)
goto cleanup;
@@ -81,16 +98,21 @@ errcode_t ext2fs_mkdir(ext2_filsys fs, ext2_ino_t parent, ext2_ino_t inum,
/*
* Create the inode structure....
*/
- memset(&inode, 0, sizeof(struct ext2_inode));
inode.i_mode = LINUX_S_IFDIR | (0777 & ~fs->umask);
inode.i_uid = inode.i_gid = 0;
- ext2fs_iblk_set(fs, &inode, 1);
- if (fs->super->s_feature_incompat & EXT3_FEATURE_INCOMPAT_EXTENTS)
- inode.i_flags |= EXT4_EXTENTS_FL;
- else
- inode.i_block[0] = blk;
+ if (inline_data) {
+ inode.i_flags |= EXT4_INLINE_DATA_FL;
+ inode.i_size = EXT4_MIN_INLINE_DATA_SIZE;
+ } else {
+ if (fs->super->s_feature_incompat &
+ EXT3_FEATURE_INCOMPAT_EXTENTS)
+ inode.i_flags |= EXT4_EXTENTS_FL;
+ else
+ inode.i_block[0] = blk;
+ inode.i_size = fs->blocksize;
+ ext2fs_iblk_set(fs, &inode, 1);
+ }
inode.i_links_count = 2;
- inode.i_size = fs->blocksize;
/*
* Write out the inode and inode data block. The inode generation
@@ -100,18 +122,24 @@ errcode_t ext2fs_mkdir(ext2_filsys fs, ext2_ino_t parent, ext2_ino_t inum,
retval = ext2fs_write_new_inode(fs, ino, &inode);
if (retval)
goto cleanup;
- retval = ext2fs_write_dir_block4(fs, blk, block, 0, ino);
- if (retval)
- goto cleanup;
-
- if (fs->super->s_feature_incompat & EXT3_FEATURE_INCOMPAT_EXTENTS) {
- retval = ext2fs_extent_open2(fs, ino, &inode, &handle);
- if (retval)
- goto cleanup;
- retval = ext2fs_extent_set_bmap(handle, 0, blk, 0);
- ext2fs_extent_free(handle);
+ if (inline_data) {
+ /* init "system.data" for new dir */
+ retval = ext2fs_inline_data_init(fs, ino);
+ } else {
+ retval = ext2fs_write_dir_block4(fs, blk, block, 0, ino);
if (retval)
goto cleanup;
+
+ if (fs->super->s_feature_incompat &
+ EXT3_FEATURE_INCOMPAT_EXTENTS) {
+ retval = ext2fs_extent_open2(fs, ino, &inode, &handle);
+ if (retval)
+ goto cleanup;
+ retval = ext2fs_extent_set_bmap(handle, 0, blk, 0);
+ ext2fs_extent_free(handle);
+ if (retval)
+ goto cleanup;
+ }
}
/*
@@ -136,6 +164,10 @@ errcode_t ext2fs_mkdir(ext2_filsys fs, ext2_ino_t parent, ext2_ino_t inum,
* Update parent inode's counts
*/
if (parent != ino) {
+ /* reload parent inode due to inline data */
+ retval = ext2fs_read_inode(fs, parent, &parent_inode);
+ if (retval)
+ goto cleanup;
parent_inode.i_links_count++;
retval = ext2fs_write_inode(fs, parent, &parent_inode);
if (retval)
@@ -145,7 +177,8 @@ errcode_t ext2fs_mkdir(ext2_filsys fs, ext2_ino_t parent, ext2_ino_t inum,
/*
* Update accounting....
*/
- ext2fs_block_alloc_stats2(fs, blk, +1);
+ if (!inline_data)
+ ext2fs_block_alloc_stats2(fs, blk, +1);
ext2fs_inode_alloc_stats2(fs, ino, +1, 1);
cleanup:
diff --git a/lib/ext2fs/newdir.c b/lib/ext2fs/newdir.c
index d134bdf..5358c74 100644
--- a/lib/ext2fs/newdir.c
+++ b/lib/ext2fs/newdir.c
@@ -89,3 +89,28 @@ errcode_t ext2fs_new_dir_block(ext2_filsys fs, ext2_ino_t dir_ino,
*block = buf;
return 0;
}
+
+/*
+ * Create new directory on inline data
+ */
+errcode_t ext2fs_new_dir_inline_data(ext2_filsys fs, ext2_ino_t dir_ino,
+ ext2_ino_t parent_ino, __u32 *iblock)
+{
+ struct ext2_dir_entry *dir = NULL;
+ errcode_t retval;
+ char *buf;
+ int rec_len;
+ int filetype = 0;
+
+ EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
+
+ iblock[0] = ext2fs_cpu_to_le32(parent_ino);
+
+ dir = (struct ext2_dir_entry *)((char *)iblock +
+ EXT4_INLINE_DATA_DOTDOT_SIZE);
+ dir->inode = 0;
+ rec_len = EXT4_MIN_INLINE_DATA_SIZE - EXT4_INLINE_DATA_DOTDOT_SIZE;
+ retval = ext2fs_set_rec_len(fs, rec_len, dir);
+
+ return retval;
+}
--
1.7.9.7
--
To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Powered by blists - more mailing lists