Message-ID: <1393661175-459-11-git-send-email-liezhi.yang@windriver.com>
Date:	Sat, 1 Mar 2014 03:06:14 -0500
From:	Robert Yang <liezhi.yang@...driver.com>
To:	<tytso@....edu>, <dvhart@...ux.intel.com>
CC:	<linux-ext4@...r.kernel.org>
Subject: [PATCH V4 10/11] debugfs: use the functions in misc/create_inode.c

* Use the functions in misc/create_inode.c, and remove the duplicated
  code.

* The CREATE_INODE_DEPS in the debugfs/Makefile.in is used for recording
  create_inode.o's depends which is from misc/Makefile.in, we have to
  recompile create_inode.o because we need it to print more messages when
  it is used by debugfs, just like we recompile e2freefrag.o, but it seems
  that the e2freefrag.o's depends in debugfs/Makefile.in is incorrect, it
  would not rebuild when its depends (e.g.: lib/config.h) is changed,
  which would cause unexpected errors. Make duplicated code in
  debugfs/Makefile.in and misc/Makefile.in is not a good idea, maybe we'd
  better define CREATE_INODE_DEPS in the top Makefile, I'd like to send
  another patch and fix the e2freefrag if you are fine with it.

Signed-off-by: Robert Yang <liezhi.yang@...driver.com>
Reviewed-by: Darren Hart <dvhart@...ux.intel.com>
---
 debugfs/Makefile.in |   17 ++-
 debugfs/debugfs.c   |  305 +++------------------------------------------------
 debugfs/debugfs.h   |    1 +
 3 files changed, 31 insertions(+), 292 deletions(-)

diff --git a/debugfs/Makefile.in b/debugfs/Makefile.in
index 5ddeab7..a82a53b 100644
--- a/debugfs/Makefile.in
+++ b/debugfs/Makefile.in
@@ -18,7 +18,7 @@ MK_CMDS=	_SS_DIR_OVERRIDE=../lib/ss ../lib/ss/mk_cmds
 
 DEBUG_OBJS= debug_cmds.o debugfs.o util.o ncheck.o icheck.o ls.o \
 	lsdel.o dump.o set_fields.o logdump.o htree.o unused.o e2freefrag.o \
-	filefrag.o extent_cmds.o extent_inode.o zap.o
+	filefrag.o extent_cmds.o extent_inode.o zap.o create_inode.o
 
 RO_DEBUG_OBJS= ro_debug_cmds.o ro_debugfs.o util.o ncheck.o icheck.o ls.o \
 	lsdel.o logdump.o htree.o e2freefrag.o filefrag.o extent_cmds.o \
@@ -28,7 +28,13 @@ SRCS= debug_cmds.c $(srcdir)/debugfs.c $(srcdir)/util.c $(srcdir)/ls.c \
 	$(srcdir)/ncheck.c $(srcdir)/icheck.c $(srcdir)/lsdel.c \
 	$(srcdir)/dump.c $(srcdir)/set_fields.c ${srcdir}/logdump.c \
 	$(srcdir)/htree.c $(srcdir)/unused.c ${srcdir}/../misc/e2freefrag.c \
-	$(srcdir)/filefrag.c $(srcdir)/extent_inode.c $(srcdir)/zap.c
+	$(srcdir)/filefrag.c $(srcdir)/extent_inode.c $(srcdir)/zap.c \
+	$(srcdir)/../misc/create_inode.c
+
+CREATE_INODE_DEPS= $(srcdir)/../misc/create_inode.h \
+	$(srcdir)/../misc/create_inode.c $(top_builddir)/lib/config.h \
+	$(srcdir)/../lib/ext2fs/ext2fs.h $(srcdir)/../lib/et/com_err.h \
+	$(srcdir)/../lib/e2p/e2p.h $(srcdir)/../misc/nls-enable.h
 
 LIBS= $(LIBEXT2FS) $(LIBE2P) $(LIBSS) $(LIBCOM_ERR) $(LIBBLKID) \
 	$(LIBUUID) $(SYSLIBS)
@@ -81,6 +87,11 @@ e2freefrag.o: $(srcdir)/../misc/e2freefrag.c
 	$(E) "	CC $@"
 	$(Q) $(CC) -c $(ALL_CFLAGS) -I$(srcdir) $< -DDEBUGFS -o $@
 
+create_inode.o: $(CREATE_INODE_DEPS)
+	$(E) "	CC $@"
+	$(Q) $(CC) -c $(ALL_CFLAGS) -I$(srcdir) \
+		 $(srcdir)/../misc/create_inode.c -DDEBUGFS -o $@
+
 debugfs.8: $(DEP_SUBSTITUTE) $(srcdir)/debugfs.8.in
 	$(E) "	SUBST $@"
 	$(Q) $(SUBSTITUTE_UPTIME) $(srcdir)/debugfs.8.in debugfs.8
@@ -142,7 +153,7 @@ debugfs.o: $(srcdir)/debugfs.c $(top_srcdir)/lib/et/com_err.h \
  $(top_srcdir)/lib/ext2fs/ext2_ext_attr.h $(top_srcdir)/lib/ext2fs/bitops.h \
  $(top_srcdir)/lib/e2p/e2p.h $(top_srcdir)/version.h $(srcdir)/jfs_user.h \
  $(top_srcdir)/lib/ext2fs/kernel-jbd.h $(top_srcdir)/lib/ext2fs/jfs_compat.h \
- $(top_srcdir)/lib/ext2fs/kernel-list.h
+ $(top_srcdir)/lib/ext2fs/kernel-list.h $(top_srcdir)/misc/util.h
 util.o: $(srcdir)/util.c $(srcdir)/debugfs.h \
  $(top_srcdir)/lib/ext2fs/ext2_fs.h $(top_builddir)/lib/ext2fs/ext2_types.h \
  $(top_srcdir)/lib/ext2fs/ext2fs.h $(top_srcdir)/lib/ext2fs/ext3_extents.h \
diff --git a/debugfs/debugfs.c b/debugfs/debugfs.c
index d8d6d76..1706815 100644
--- a/debugfs/debugfs.c
+++ b/debugfs/debugfs.c
@@ -25,8 +25,6 @@ extern char *optarg;
 #include <errno.h>
 #endif
 #include <fcntl.h>
-#include <sys/types.h>
-#include <sys/stat.h>
 
 #include "debugfs.h"
 #include "uuid/uuid.h"
@@ -41,22 +39,11 @@ extern char *optarg;
 #define BUFSIZ 8192
 #endif
 
-/* 64KiB is the minimium blksize to best minimize system call overhead. */
-#ifndef IO_BUFSIZE
-#define IO_BUFSIZE 64*1024
-#endif
-
-/* Block size for `st_blocks' */
-#ifndef S_BLKSIZE
-#define S_BLKSIZE 512
-#endif
-
 ss_request_table *extra_cmds;
 const char *debug_prog_name;
 int sci_idx;
 
-ext2_filsys	current_fs = NULL;
-ext2_ino_t	root, cwd;
+ext2_ino_t	cwd;
 
 static void open_filesystem(char *device, int open_flags, blk64_t superblock,
 			    blk64_t blocksize, int catastrophic,
@@ -1587,189 +1574,24 @@ void do_find_free_inode(int argc, char *argv[])
 }
 
 #ifndef READ_ONLY
-static errcode_t copy_file(int fd, ext2_ino_t newfile, int bufsize, int make_holes)
-{
-	ext2_file_t	e2_file;
-	errcode_t	retval;
-	int		got;
-	unsigned int	written;
-	char		*buf;
-	char		*ptr;
-	char		*zero_buf;
-	int		cmp;
-
-	retval = ext2fs_file_open(current_fs, newfile,
-				  EXT2_FILE_WRITE, &e2_file);
-	if (retval)
-		return retval;
-
-	retval = ext2fs_get_mem(bufsize, &buf);
-	if (retval) {
-		com_err("copy_file", retval, "can't allocate buffer\n");
-		return retval;
-	}
-
-	/* This is used for checking whether the whole block is zero */
-	retval = ext2fs_get_memzero(bufsize, &zero_buf);
-	if (retval) {
-		com_err("copy_file", retval, "can't allocate buffer\n");
-		ext2fs_free_mem(&buf);
-		return retval;
-	}
-
-	while (1) {
-		got = read(fd, buf, bufsize);
-		if (got == 0)
-			break;
-		if (got < 0) {
-			retval = errno;
-			goto fail;
-		}
-		ptr = buf;
-
-		/* Sparse copy */
-		if (make_holes) {
-			/* Check whether all is zero */
-			cmp = memcmp(ptr, zero_buf, got);
-			if (cmp == 0) {
-				 /* The whole block is zero, make a hole */
-				retval = ext2fs_file_lseek(e2_file, got, EXT2_SEEK_CUR, NULL);
-				if (retval)
-					goto fail;
-				got = 0;
-			}
-		}
-
-		/* Normal copy */
-		while (got > 0) {
-			retval = ext2fs_file_write(e2_file, ptr,
-						   got, &written);
-			if (retval)
-				goto fail;
-
-			got -= written;
-			ptr += written;
-		}
-	}
-	ext2fs_free_mem(&buf);
-	ext2fs_free_mem(&zero_buf);
-	retval = ext2fs_file_close(e2_file);
-	return retval;
-
-fail:
-	ext2fs_free_mem(&buf);
-	ext2fs_free_mem(&zero_buf);
-	(void) ext2fs_file_close(e2_file);
-	return retval;
-}
-
-
 void do_write(int argc, char *argv[])
 {
-	int		fd;
-	struct stat	statbuf;
-	ext2_ino_t	newfile;
 	errcode_t	retval;
-	struct ext2_inode inode;
-	int		bufsize = IO_BUFSIZE;
-	int		make_holes = 0;
 
 	if (common_args_process(argc, argv, 3, 3, "write",
 				"<native file> <new file>", CHECK_FS_RW))
 		return;
 
-	fd = open(argv[1], O_RDONLY);
-	if (fd < 0) {
-		com_err(argv[1], errno, 0);
-		return;
-	}
-	if (fstat(fd, &statbuf) < 0) {
-		com_err(argv[1], errno, 0);
-		close(fd);
-		return;
-	}
-
-	retval = ext2fs_namei(current_fs, root, cwd, argv[2], &newfile);
-	if (retval == 0) {
-		com_err(argv[0], 0, "The file '%s' already exists\n", argv[2]);
-		close(fd);
-		return;
-	}
-
-	retval = ext2fs_new_inode(current_fs, cwd, 010755, 0, &newfile);
-	if (retval) {
+	if ((retval = do_write_internal(cwd, argv[1], argv[2])))
 		com_err(argv[0], retval, 0);
-		close(fd);
-		return;
-	}
-	printf("Allocated inode: %u\n", newfile);
-	retval = ext2fs_link(current_fs, cwd, argv[2], newfile,
-			     EXT2_FT_REG_FILE);
-	if (retval == EXT2_ET_DIR_NO_SPACE) {
-		retval = ext2fs_expand_dir(current_fs, cwd);
-		if (retval) {
-			com_err(argv[0], retval, "while expanding directory");
-			close(fd);
-			return;
-		}
-		retval = ext2fs_link(current_fs, cwd, argv[2], newfile,
-				     EXT2_FT_REG_FILE);
-	}
-	if (retval) {
-		com_err(argv[2], retval, 0);
-		close(fd);
-		return;
-	}
-        if (ext2fs_test_inode_bitmap2(current_fs->inode_map,newfile))
-		com_err(argv[0], 0, "Warning: inode already set");
-	ext2fs_inode_alloc_stats2(current_fs, newfile, +1, 0);
-	memset(&inode, 0, sizeof(inode));
-	inode.i_mode = (statbuf.st_mode & ~LINUX_S_IFMT) | LINUX_S_IFREG;
-	inode.i_atime = inode.i_ctime = inode.i_mtime =
-		current_fs->now ? current_fs->now : time(0);
-	inode.i_links_count = 1;
-	inode.i_size = statbuf.st_size;
-	if (current_fs->super->s_feature_incompat &
-	    EXT3_FEATURE_INCOMPAT_EXTENTS) {
-		int i;
-		struct ext3_extent_header *eh;
-
-		eh = (struct ext3_extent_header *) &inode.i_block[0];
-		eh->eh_depth = 0;
-		eh->eh_entries = 0;
-		eh->eh_magic = ext2fs_cpu_to_le16(EXT3_EXT_MAGIC);
-		i = (sizeof(inode.i_block) - sizeof(*eh)) /
-			sizeof(struct ext3_extent);
-		eh->eh_max = ext2fs_cpu_to_le16(i);
-		inode.i_flags |= EXT4_EXTENTS_FL;
-	}
-	if (debugfs_write_new_inode(newfile, &inode, argv[0])) {
-		close(fd);
-		return;
-	}
-	if (LINUX_S_ISREG(inode.i_mode)) {
-		if (statbuf.st_blocks < statbuf.st_size / S_BLKSIZE) {
-			make_holes = 1;
-			/*
-			 * Use I/O blocksize as buffer size when
-			 * copying sparse files.
-			 */
-			bufsize = statbuf.st_blksize;
-		}
-		retval = copy_file(fd, newfile, bufsize, make_holes);
-		if (retval)
-			com_err("copy_file", retval, 0);
-	}
-	close(fd);
 }
 
 void do_mknod(int argc, char *argv[])
 {
 	unsigned long	mode, major, minor;
-	ext2_ino_t	newfile;
 	errcode_t 	retval;
-	struct ext2_inode inode;
 	int		filetype, nr;
+	struct stat	st;
 
 	if (check_fs_open(argv[0]))
 		return;
@@ -1778,115 +1600,50 @@ void do_mknod(int argc, char *argv[])
 		com_err(argv[0], 0, "Usage: mknod <name> [p| [c|b] <major> <minor>]");
 		return;
 	}
+
 	mode = minor = major = 0;
 	switch (argv[2][0]) {
 		case 'p':
-			mode = LINUX_S_IFIFO;
-			filetype = EXT2_FT_FIFO;
+			st.st_mode = S_IFIFO;
 			nr = 3;
 			break;
 		case 'c':
-			mode = LINUX_S_IFCHR;
-			filetype = EXT2_FT_CHRDEV;
+			st.st_mode = S_IFCHR;
 			nr = 5;
 			break;
 		case 'b':
-			mode = LINUX_S_IFBLK;
-			filetype = EXT2_FT_BLKDEV;
+			st.st_mode = S_IFBLK;
 			nr = 5;
 			break;
 		default:
-			filetype = 0;
 			nr = 0;
 	}
+
 	if (nr == 5) {
 		major = strtoul(argv[3], argv+3, 0);
 		minor = strtoul(argv[4], argv+4, 0);
 		if (major > 65535 || minor > 65535 || argv[3][0] || argv[4][0])
 			nr = 0;
 	}
+
 	if (argc != nr)
 		goto usage;
-	if (check_fs_read_write(argv[0]))
-		return;
-	retval = ext2fs_new_inode(current_fs, cwd, 010755, 0, &newfile);
-	if (retval) {
+
+	st.st_rdev = makedev(major, minor);
+	if ((retval = do_mknod_internal(cwd, argv[1], &st)))
 		com_err(argv[0], retval, 0);
-		return;
-	}
-	printf("Allocated inode: %u\n", newfile);
-	retval = ext2fs_link(current_fs, cwd, argv[1], newfile, filetype);
-	if (retval == EXT2_ET_DIR_NO_SPACE) {
-		retval = ext2fs_expand_dir(current_fs, cwd);
-		if (retval) {
-			com_err(argv[0], retval, "while expanding directory");
-			return;
-		}
-		retval = ext2fs_link(current_fs, cwd, argv[1], newfile,
-				     filetype);
-	}
-	if (retval) {
-		com_err(argv[1], retval, 0);
-		return;
-	}
-        if (ext2fs_test_inode_bitmap2(current_fs->inode_map,newfile))
-		com_err(argv[0], 0, "Warning: inode already set");
-	ext2fs_inode_alloc_stats2(current_fs, newfile, +1, 0);
-	memset(&inode, 0, sizeof(inode));
-	inode.i_mode = mode;
-	inode.i_atime = inode.i_ctime = inode.i_mtime =
-		current_fs->now ? current_fs->now : time(0);
-	if ((major < 256) && (minor < 256)) {
-		inode.i_block[0] = major*256+minor;
-		inode.i_block[1] = 0;
-	} else {
-		inode.i_block[0] = 0;
-		inode.i_block[1] = (minor & 0xff) | (major << 8) | ((minor & ~0xff) << 12);
-	}
-	inode.i_links_count = 1;
-	if (debugfs_write_new_inode(newfile, &inode, argv[0]))
-		return;
 }
 
 void do_mkdir(int argc, char *argv[])
 {
-	char	*cp;
-	ext2_ino_t	parent;
-	char	*name;
 	errcode_t retval;
 
 	if (common_args_process(argc, argv, 2, 2, "mkdir",
 				"<filename>", CHECK_FS_RW))
 		return;
 
-	cp = strrchr(argv[1], '/');
-	if (cp) {
-		*cp = 0;
-		parent = string_to_inode(argv[1]);
-		if (!parent) {
-			com_err(argv[1], ENOENT, 0);
-			return;
-		}
-		name = cp+1;
-	} else {
-		parent = cwd;
-		name = argv[1];
-	}
-
-try_again:
-	retval = ext2fs_mkdir(current_fs, parent, 0, name);
-	if (retval == EXT2_ET_DIR_NO_SPACE) {
-		retval = ext2fs_expand_dir(current_fs, parent);
-		if (retval) {
-			com_err(argv[0], retval, "while expanding directory");
-			return;
-		}
-		goto try_again;
-	}
-	if (retval) {
-		com_err("ext2fs_mkdir", retval, 0);
-		return;
-	}
+	if ((retval = do_mkdir_internal(cwd, argv[1], NULL)))
+		com_err(argv[0], retval, 0);
 
 }
 
@@ -2281,44 +2038,14 @@ void do_punch(int argc, char *argv[])
 
 void do_symlink(int argc, char *argv[])
 {
-	char		*cp;
-	ext2_ino_t	parent;
-	char		*name, *target;
 	errcode_t	retval;
 
 	if (common_args_process(argc, argv, 3, 3, "symlink",
 				"<filename> <target>", CHECK_FS_RW))
 		return;
 
-	cp = strrchr(argv[1], '/');
-	if (cp) {
-		*cp = 0;
-		parent = string_to_inode(argv[1]);
-		if (!parent) {
-			com_err(argv[1], ENOENT, 0);
-			return;
-		}
-		name = cp+1;
-	} else {
-		parent = cwd;
-		name = argv[1];
-	}
-	target = argv[2];
-
-try_again:
-	retval = ext2fs_symlink(current_fs, parent, 0, name, target);
-	if (retval == EXT2_ET_DIR_NO_SPACE) {
-		retval = ext2fs_expand_dir(current_fs, parent);
-		if (retval) {
-			com_err(argv[0], retval, "while expanding directory");
-			return;
-		}
-		goto try_again;
-	}
-	if (retval) {
-		com_err("ext2fs_symlink", retval, 0);
-		return;
-	}
+	if ((retval = do_symlink_internal(cwd, argv[1], argv[2])))
+		com_err(argv[0], retval, 0);
 
 }
 
diff --git a/debugfs/debugfs.h b/debugfs/debugfs.h
index 33389fa..5e3b256 100644
--- a/debugfs/debugfs.h
+++ b/debugfs/debugfs.h
@@ -5,6 +5,7 @@
 #include "ss/ss.h"
 #include "ext2fs/ext2_fs.h"
 #include "ext2fs/ext2fs.h"
+#include "../misc/create_inode.h"
 
 #ifdef __STDC__
 #define NOARGS void
-- 
1.7.10.4

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