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Message-ID: <1387800600-13718-2-git-send-email-liezhi.yang@windriver.com>
Date: Mon, 23 Dec 2013 07:09:51 -0500
From: Robert Yang <liezhi.yang@...driver.com>
To: <tytso@....edu>, <dvhart@...ux.intel.com>
CC: <linux-ext4@...r.kernel.org>
Subject: [PATCH 01/10] mke2fs.c: add an option: -d root-directory
This option is used for adding the files from a given directory (the
root-directory) to the filesystem, it is similiar to genext2fs, but
genext2fs doesn't fully support ext4.
This commit describes the skeleton of the implementation:
* We already have the basic operations in debugfs:
- Copy regular file
- Create directory
- Create symlink
- Create special file
We will move these operations into create_inode.h and create_inode.c,
then let both mke2fs and debugfs use them.
* What we need to do are:
- Copy the given directory recursively
- Set the owner, mode and other informations
- Handle the hard links
TODO:
- The libext2fs can't create the socket file (S_IFSOCK), do we have a
plan to support it ?
Signed-off-by: Robert Yang <liezhi.yang@...driver.com>
---
misc/Makefile.in | 13 +++++++++----
misc/create_inode.c | 26 ++++++++++++++++++++++++++
misc/create_inode.h | 17 +++++++++++++++++
misc/mke2fs.c | 32 +++++++++++++++++++++++---------
4 files changed, 75 insertions(+), 13 deletions(-)
create mode 100644 misc/create_inode.c
create mode 100644 misc/create_inode.h
diff --git a/misc/Makefile.in b/misc/Makefile.in
index a798f96..da780fe 100644
--- a/misc/Makefile.in
+++ b/misc/Makefile.in
@@ -42,7 +42,7 @@ LPROGS= @E2INITRD_PROG@
TUNE2FS_OBJS= tune2fs.o util.o
MKLPF_OBJS= mklost+found.o
-MKE2FS_OBJS= mke2fs.o util.o profile.o prof_err.o default_profile.o
+MKE2FS_OBJS= mke2fs.o util.o profile.o prof_err.o default_profile.o create_inode.o
CHATTR_OBJS= chattr.o
LSATTR_OBJS= lsattr.o
UUIDGEN_OBJS= uuidgen.o
@@ -60,7 +60,8 @@ E2FREEFRAG_OBJS= e2freefrag.o
PROFILED_TUNE2FS_OBJS= profiled/tune2fs.o profiled/util.o
PROFILED_MKLPF_OBJS= profiled/mklost+found.o
PROFILED_MKE2FS_OBJS= profiled/mke2fs.o profiled/util.o profiled/profile.o \
- profiled/prof_err.o profiled/default_profile.o
+ profiled/prof_err.o profiled/default_profile.o \
+ profiled/create_inode.o
PROFILED_CHATTR_OBJS= profiled/chattr.o
PROFILED_LSATTR_OBJS= profiled/lsattr.o
PROFILED_UUIDGEN_OBJS= profiled/uuidgen.o
@@ -82,7 +83,7 @@ SRCS= $(srcdir)/tune2fs.c $(srcdir)/mklost+found.c $(srcdir)/mke2fs.c \
$(srcdir)/uuidgen.c $(srcdir)/blkid.c $(srcdir)/logsave.c \
$(srcdir)/filefrag.c $(srcdir)/base_device.c \
$(srcdir)/ismounted.c $(srcdir)/../e2fsck/profile.c \
- $(srcdir)/e2undo.c $(srcdir)/e2freefrag.c
+ $(srcdir)/e2undo.c $(srcdir)/e2freefrag.c $(srcdir)/create_inode.c
LIBS= $(LIBEXT2FS) $(LIBCOM_ERR)
DEPLIBS= $(LIBEXT2FS) $(DEPLIBCOM_ERR)
@@ -612,7 +613,7 @@ mke2fs.o: $(srcdir)/mke2fs.c $(top_builddir)/lib/config.h \
$(top_srcdir)/lib/ext2fs/ext2_ext_attr.h $(top_srcdir)/lib/ext2fs/bitops.h \
$(top_srcdir)/lib/e2p/e2p.h $(top_srcdir)/lib/ext2fs/ext2fs.h \
$(srcdir)/util.h profile.h prof_err.h $(top_srcdir)/version.h \
- $(srcdir)/nls-enable.h $(top_srcdir)/lib/quota/mkquota.h \
+ $(srcdir)/nls-enable.h $(top_srcdir)/lib/quota/mkquota.h $(srcdir)/create_inode.h\
$(top_srcdir)/lib/quota/quotaio.h $(top_srcdir)/lib/quota/dqblk_v2.h \
$(top_srcdir)/lib/quota/quotaio_tree.h $(top_srcdir)/lib/../e2fsck/dict.h
chattr.o: $(srcdir)/chattr.c $(top_builddir)/lib/config.h \
@@ -692,3 +693,7 @@ e2freefrag.o: $(srcdir)/e2freefrag.c $(top_builddir)/lib/config.h \
$(top_srcdir)/lib/ext2fs/ext2_io.h $(top_builddir)/lib/ext2fs/ext2_err.h \
$(top_srcdir)/lib/ext2fs/ext2_ext_attr.h $(top_srcdir)/lib/ext2fs/bitops.h \
$(srcdir)/e2freefrag.h
+create_inode.o: $(srcdir)/create_inode.h $(srcdir)/create_inode.c \
+ $(top_builddir)/lib/config.h $(top_srcdir)/lib/ext2fs/ext2fs.h \
+ $(top_srcdir)/lib/et/com_err.h $(top_srcdir)/lib/e2p/e2p.h \
+ $(srcdir)/nls-enable.h
diff --git a/misc/create_inode.c b/misc/create_inode.c
new file mode 100644
index 0000000..46aaa60
--- /dev/null
+++ b/misc/create_inode.c
@@ -0,0 +1,26 @@
+#include "create_inode.h"
+
+/* Make a special file which is block, character and fifo */
+errcode_t do_mknod_internal(ext2_ino_t cwd, const char *name, struct stat *st)
+{
+}
+
+/* Make a symlink name -> target */
+errcode_t do_symlink_internal(ext2_ino_t cwd, const char *name, char *target)
+{
+}
+
+/* Make a directory in the fs */
+errcode_t do_mkdir_internal(ext2_ino_t cwd, const char *name, struct stat *st)
+{
+}
+
+/* Copy the native file to the fs */
+errcode_t do_write_internal(ext2_ino_t cwd, const char *src, const char *dest)
+{
+}
+
+/* Copy files from source_dir to fs */
+errcode_t populate_fs(ext2_ino_t parent_ino, const char *source_dir)
+{
+}
diff --git a/misc/create_inode.h b/misc/create_inode.h
new file mode 100644
index 0000000..9fc97fa
--- /dev/null
+++ b/misc/create_inode.h
@@ -0,0 +1,17 @@
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include "et/com_err.h"
+#include "e2p/e2p.h"
+#include "ext2fs/ext2fs.h"
+#include "nls-enable.h"
+
+ext2_filsys current_fs;
+ext2_ino_t root;
+
+/* For populating the filesystem */
+extern errcode_t populate_fs(ext2_ino_t parent_ino, const char *source_dir);
+extern errcode_t do_mknod_internal(ext2_ino_t cwd, const char *name, struct stat *st);
+extern errcode_t do_symlink_internal(ext2_ino_t cwd, const char *name, char *target);
+extern errcode_t do_mkdir_internal(ext2_ino_t cwd, const char *name, struct stat *st);
+extern errcode_t do_write_internal(ext2_ino_t cwd, const char *src, const char *dest);
diff --git a/misc/mke2fs.c b/misc/mke2fs.c
index 4075099..eab5463 100644
--- a/misc/mke2fs.c
+++ b/misc/mke2fs.c
@@ -22,7 +22,6 @@
#include <stdio.h>
#include <string.h>
#include <strings.h>
-#include <fcntl.h>
#include <ctype.h>
#include <time.h>
#ifdef __linux__
@@ -44,24 +43,19 @@ extern int optind;
#include <errno.h>
#endif
#include <sys/ioctl.h>
-#include <sys/types.h>
-#include <sys/stat.h>
#include <libgen.h>
#include <limits.h>
#include <blkid/blkid.h>
#include "ext2fs/ext2_fs.h"
#include "ext2fs/ext2fsP.h"
-#include "et/com_err.h"
#include "uuid/uuid.h"
-#include "e2p/e2p.h"
-#include "ext2fs/ext2fs.h"
#include "util.h"
#include "profile.h"
#include "prof_err.h"
#include "../version.h"
-#include "nls-enable.h"
#include "quota/mkquota.h"
+#include "create_inode.h"
#define STRIDE_LENGTH 8
@@ -105,6 +99,7 @@ char *mount_dir;
char *journal_device;
int sync_kludge; /* Set using the MKE2FS_SYNC env. option */
char **fs_types;
+const char *root_dir; /* Copy files from the specified directory */
profile_t profile;
@@ -116,7 +111,8 @@ static void usage(void)
fprintf(stderr, _("Usage: %s [-c|-l filename] [-b block-size] "
"[-C cluster-size]\n\t[-i bytes-per-inode] [-I inode-size] "
"[-J journal-options]\n"
- "\t[-G flex-group-size] [-N number-of-inodes]\n"
+ "\t[-G flex-group-size] [-N number-of-inodes] "
+ "[-d root-directory]\n"
"\t[-m reserved-blocks-percentage] [-o creator-os]\n"
"\t[-g blocks-per-group] [-L volume-label] "
"[-M last-mounted-directory]\n\t[-O feature[,...]] "
@@ -1403,7 +1399,7 @@ profile_error:
}
while ((c = getopt (argc, argv,
- "b:cg:i:jl:m:no:qr:s:t:vC:DE:FG:I:J:KL:M:N:O:R:ST:U:V")) != EOF) {
+ "b:cg:i:jl:m:no:qr:s:t:d:vC:DE:FG:I:J:KL:M:N:O:R:ST:U:V")) != EOF) {
switch (c) {
case 'b':
blocksize = parse_num_blocks2(optarg, -1);
@@ -1591,6 +1587,9 @@ profile_error:
case 'U':
fs_uuid = optarg;
break;
+ case 'd':
+ root_dir = optarg;
+ break;
case 'v':
verbose = 1;
break;
@@ -2798,6 +2797,21 @@ no_journal:
EXT4_FEATURE_RO_COMPAT_QUOTA))
create_quota_inodes(fs);
+ /* Copy files from the specified directory */
+ if (root_dir) {
+ if (!quiet)
+ printf("%s", _("Copying files into the device: "));
+
+ current_fs = fs;
+ root = EXT2_ROOT_INO;
+ retval = populate_fs(root, root_dir);
+ if (retval)
+ fprintf(stderr, "%s",
+ _("\nError while populating %s"), root_dir);
+ else if (!quiet)
+ printf("%s", _("done\n"));
+ }
+
if (!quiet)
printf("%s", _("Writing superblocks and "
"filesystem accounting information: "));
--
1.7.10.4
--
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