--- /dev/null
- inode.i_size = statbuf.st_size;
+/*
+ * create_inode.c --- create an inode
+ *
+ * Copyright (C) 2014 Robert Yang <liezhi.yang@windriver.com>
+ *
+ * %Begin-Header%
+ * This file may be redistributed under the terms of the GNU library
+ * General Public License, version 2.
+ * %End-Header%
+ */
+
+#include <time.h>
+#include <unistd.h>
+#include <limits.h> /* for PATH_MAX */
+
+#include "create_inode.h"
+
+#if __STDC_VERSION__ < 199901L
+# if __GNUC__ >= 2
+# define __func__ __FUNCTION__
+# else
+# define __func__ "<unknown>"
+# endif
+#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
+
+/* Link an inode number to a directory */
+static errcode_t add_link(ext2_filsys fs, ext2_ino_t parent_ino,
+ ext2_ino_t ino, const char *name)
+{
+ struct ext2_inode inode;
+ errcode_t retval;
+
+ retval = ext2fs_read_inode(fs, ino, &inode);
+ if (retval) {
+ com_err(__func__, retval, "while reading inode %u", ino);
+ return retval;
+ }
+
+ retval = ext2fs_link(fs, parent_ino, name, ino, inode.i_flags);
+ if (retval == EXT2_ET_DIR_NO_SPACE) {
+ retval = ext2fs_expand_dir(fs, parent_ino);
+ if (retval) {
+ com_err(__func__, retval, "while expanding directory");
+ return retval;
+ }
+ retval = ext2fs_link(fs, parent_ino, name, ino, inode.i_flags);
+ }
+ if (retval) {
+ com_err(__func__, retval, "while linking %s", name);
+ return retval;
+ }
+
+ inode.i_links_count++;
+
+ retval = ext2fs_write_inode(fs, ino, &inode);
+ if (retval)
+ com_err(__func__, retval, "while writing inode %u", ino);
+
+ return retval;
+}
+
+/* Fill the uid, gid, mode and time for the inode */
+static void fill_inode(struct ext2_inode *inode, struct stat *st)
+{
+ if (st != NULL) {
+ inode->i_uid = st->st_uid;
+ inode->i_gid = st->st_gid;
+ inode->i_mode |= st->st_mode;
+ inode->i_atime = st->st_atime;
+ inode->i_mtime = st->st_mtime;
+ inode->i_ctime = st->st_ctime;
+ }
+}
+
+/* Set the uid, gid, mode and time for the inode */
+static errcode_t set_inode_extra(ext2_filsys fs, ext2_ino_t cwd,
+ ext2_ino_t ino, struct stat *st)
+{
+ errcode_t retval;
+ struct ext2_inode inode;
+
+ retval = ext2fs_read_inode(fs, ino, &inode);
+ if (retval) {
+ com_err(__func__, retval, "while reading inode %u", ino);
+ return retval;
+ }
+
+ fill_inode(&inode, st);
+
+ retval = ext2fs_write_inode(fs, ino, &inode);
+ if (retval)
+ com_err(__func__, retval, "while writing inode %u", ino);
+ return retval;
+}
+
+/* Make a special files (block and character devices), fifo's, and sockets */
+errcode_t do_mknod_internal(ext2_filsys fs, ext2_ino_t cwd, const char *name,
+ struct stat *st)
+{
+ ext2_ino_t ino;
+ errcode_t retval;
+ struct ext2_inode inode;
+ unsigned long devmajor, devminor, mode;
+ int filetype;
+
+ switch(st->st_mode & S_IFMT) {
+ case S_IFCHR:
+ mode = LINUX_S_IFCHR;
+ filetype = EXT2_FT_CHRDEV;
+ break;
+ case S_IFBLK:
+ mode = LINUX_S_IFBLK;
+ filetype = EXT2_FT_BLKDEV;
+ break;
+ case S_IFIFO:
+ mode = LINUX_S_IFIFO;
+ filetype = EXT2_FT_FIFO;
+ break;
+ case S_IFSOCK:
+ mode = LINUX_S_IFSOCK;
+ filetype = EXT2_FT_SOCK;
+ break;
+ default:
+ return EXT2_ET_INVALID_ARGUMENT;
+ }
+
+ if (!(fs->flags & EXT2_FLAG_RW)) {
+ com_err(__func__, 0, "Filesystem opened read/only");
+ return EROFS;
+ }
+ retval = ext2fs_new_inode(fs, cwd, 010755, 0, &ino);
+ if (retval) {
+ com_err(__func__, retval, 0);
+ return retval;
+ }
+
+#ifdef DEBUGFS
+ printf("Allocated inode: %u\n", ino);
+#endif
+ retval = ext2fs_link(fs, cwd, name, ino, filetype);
+ if (retval == EXT2_ET_DIR_NO_SPACE) {
+ retval = ext2fs_expand_dir(fs, cwd);
+ if (retval) {
+ com_err(__func__, retval, "while expanding directory");
+ return retval;
+ }
+ retval = ext2fs_link(fs, cwd, name, ino, filetype);
+ }
+ if (retval) {
+ com_err(name, retval, 0);
+ return retval;
+ }
+ if (ext2fs_test_inode_bitmap2(fs->inode_map, ino))
+ com_err(__func__, 0, "Warning: inode already set");
+ ext2fs_inode_alloc_stats2(fs, ino, +1, 0);
+ memset(&inode, 0, sizeof(inode));
+ inode.i_mode = mode;
+ inode.i_atime = inode.i_ctime = inode.i_mtime =
+ fs->now ? fs->now : time(0);
+
+ if (filetype != S_IFIFO) {
+ devmajor = major(st->st_rdev);
+ devminor = minor(st->st_rdev);
+
+ if ((devmajor < 256) && (devminor < 256)) {
+ inode.i_block[0] = devmajor * 256 + devminor;
+ inode.i_block[1] = 0;
+ } else {
+ inode.i_block[0] = 0;
+ inode.i_block[1] = (devminor & 0xff) | (devmajor << 8) |
+ ((devminor & ~0xff) << 12);
+ }
+ }
+ inode.i_links_count = 1;
+
+ retval = ext2fs_write_new_inode(fs, ino, &inode);
+ if (retval)
+ com_err(__func__, retval, "while creating inode %u", ino);
+
+ return retval;
+}
+
+/* Make a symlink name -> target */
+errcode_t do_symlink_internal(ext2_filsys fs, ext2_ino_t cwd, const char *name,
+ char *target, ext2_ino_t root)
+{
+ char *cp;
+ ext2_ino_t parent_ino;
+ errcode_t retval;
+ struct ext2_inode inode;
+ struct stat st;
+
+ cp = strrchr(name, '/');
+ if (cp) {
+ *cp = 0;
+ retval = ext2fs_namei(fs, root, cwd, name, &parent_ino);
+ if (retval) {
+ com_err(name, retval, 0);
+ return retval;
+ }
+ name = cp+1;
+ } else
+ parent_ino = cwd;
+
+try_again:
+ retval = ext2fs_symlink(fs, parent_ino, 0, name, target);
+ if (retval == EXT2_ET_DIR_NO_SPACE) {
+ retval = ext2fs_expand_dir(fs, parent_ino);
+ if (retval) {
+ com_err("do_symlink_internal", retval,
+ "while expanding directory");
+ return retval;
+ }
+ goto try_again;
+ }
+ if (retval)
+ com_err("ext2fs_symlink", retval, 0);
+ return retval;
+}
+
+/* Make a directory in the fs */
+errcode_t do_mkdir_internal(ext2_filsys fs, ext2_ino_t cwd, const char *name,
+ struct stat *st, ext2_ino_t root)
+{
+ char *cp;
+ ext2_ino_t parent_ino, ino;
+ errcode_t retval;
+ struct ext2_inode inode;
+
+
+ cp = strrchr(name, '/');
+ if (cp) {
+ *cp = 0;
+ retval = ext2fs_namei(fs, root, cwd, name, &parent_ino);
+ if (retval) {
+ com_err(name, retval, 0);
+ return retval;
+ }
+ name = cp+1;
+ } else
+ parent_ino = cwd;
+
+try_again:
+ retval = ext2fs_mkdir(fs, parent_ino, 0, name);
+ if (retval == EXT2_ET_DIR_NO_SPACE) {
+ retval = ext2fs_expand_dir(fs, parent_ino);
+ if (retval) {
+ com_err(__func__, retval, "while expanding directory");
+ return retval;
+ }
+ goto try_again;
+ }
+ if (retval)
+ com_err("ext2fs_mkdir", retval, 0);
+ return retval;
+}
+
+static errcode_t copy_file(ext2_filsys fs, int fd, ext2_ino_t newfile,
+ int bufsize, int make_holes)
+{
+ ext2_file_t e2_file;
+ errcode_t retval, close_ret;
+ int got;
+ unsigned int written;
+ char *buf;
+ char *ptr;
+ char *zero_buf;
+ int cmp;
+
+ retval = ext2fs_file_open(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");
+ goto out_close;
+ }
+
+ /* 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 zero buffer\n");
+ goto out_free_buf;
+ }
+
+ 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;
+ }
+ }
+
+fail:
+ ext2fs_free_mem(&zero_buf);
+out_free_buf:
+ ext2fs_free_mem(&buf);
+out_close:
+ close_ret = ext2fs_file_close(e2_file);
+ if (retval == 0)
+ retval = close_ret;
+ return retval;
+}
+
+static int is_hardlink(struct hdlinks_s *hdlinks, dev_t dev, ino_t ino)
+{
+ int i;
+
+ for (i = 0; i < hdlinks->count; i++) {
+ if (hdlinks->hdl[i].src_dev == dev &&
+ hdlinks->hdl[i].src_ino == ino)
+ return i;
+ }
+ return -1;
+}
+
+/* Copy the native file to the fs */
+errcode_t do_write_internal(ext2_filsys fs, ext2_ino_t cwd, const char *src,
+ const char *dest, ext2_ino_t root)
+{
+ int fd;
+ struct stat statbuf;
+ ext2_ino_t newfile;
+ errcode_t retval;
+ struct ext2_inode inode;
+ int bufsize = IO_BUFSIZE;
+ int make_holes = 0;
+
+ fd = ext2fs_open_file(src, O_RDONLY, 0);
+ if (fd < 0) {
+ com_err(src, errno, 0);
+ return errno;
+ }
+ if (fstat(fd, &statbuf) < 0) {
+ com_err(src, errno, 0);
+ close(fd);
+ return errno;
+ }
+
+ retval = ext2fs_namei(fs, root, cwd, dest, &newfile);
+ if (retval == 0) {
+ close(fd);
+ return EXT2_ET_FILE_EXISTS;
+ }
+
+ retval = ext2fs_new_inode(fs, cwd, 010755, 0, &newfile);
+ if (retval) {
+ com_err(__func__, retval, 0);
+ close(fd);
+ return retval;
+ }
+#ifdef DEBUGFS
+ printf("Allocated inode: %u\n", newfile);
+#endif
+ retval = ext2fs_link(fs, cwd, dest, newfile,
+ EXT2_FT_REG_FILE);
+ if (retval == EXT2_ET_DIR_NO_SPACE) {
+ retval = ext2fs_expand_dir(fs, cwd);
+ if (retval) {
+ com_err(__func__, retval, "while expanding directory");
+ close(fd);
+ return retval;
+ }
+ retval = ext2fs_link(fs, cwd, dest, newfile,
+ EXT2_FT_REG_FILE);
+ }
+ if (retval) {
+ com_err(dest, retval, 0);
+ close(fd);
+ return errno;
+ }
+ if (ext2fs_test_inode_bitmap2(fs->inode_map, newfile))
+ com_err(__func__, 0, "Warning: inode already set");
+ ext2fs_inode_alloc_stats2(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 =
+ fs->now ? fs->now : time(0);
+ inode.i_links_count = 1;
++ retval = ext2fs_inode_size_set(fs, &inode, statbuf.st_size);
++ if (retval) {
++ com_err(dest, retval, 0);
++ close(fd);
++ return retval;
++ }
+ if (EXT2_HAS_INCOMPAT_FEATURE(fs->super,
+ EXT4_FEATURE_INCOMPAT_INLINE_DATA)) {
+ inode.i_flags |= EXT4_INLINE_DATA_FL;
+ } else if (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;
+ }
+
+ retval = ext2fs_write_new_inode(fs, newfile, &inode);
+ if (retval) {
+ com_err(__func__, retval, "while creating inode %u", newfile);
+ close(fd);
+ return retval;
+ }
+ if (inode.i_flags & EXT4_INLINE_DATA_FL) {
+ retval = ext2fs_inline_data_init(fs, newfile);
+ if (retval) {
+ com_err("copy_file", retval, 0);
+ close(fd);
+ return retval;
+ }
+ }
+ 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(fs, fd, newfile, bufsize, make_holes);
+ if (retval)
+ com_err("copy_file", retval, 0);
+ }
+ close(fd);
+
+ return retval;
+}
+
+/* Copy files from source_dir to fs */
+static errcode_t __populate_fs(ext2_filsys fs, ext2_ino_t parent_ino,
+ const char *source_dir, ext2_ino_t root,
+ struct hdlinks_s *hdlinks)
+{
+ const char *name;
+ DIR *dh;
+ struct dirent *dent;
+ struct stat st;
+ char ln_target[PATH_MAX];
+ unsigned int save_inode;
+ ext2_ino_t ino;
+ errcode_t retval = 0;
+ int read_cnt;
+ int hdlink;
+
+ if (chdir(source_dir) < 0) {
+ com_err(__func__, errno,
+ _("while changing working directory to \"%s\""),
+ source_dir);
+ return errno;
+ }
+
+ if (!(dh = opendir("."))) {
+ com_err(__func__, errno,
+ _("while opening directory \"%s\""), source_dir);
+ return errno;
+ }
+
+ while ((dent = readdir(dh))) {
+ if ((!strcmp(dent->d_name, ".")) ||
+ (!strcmp(dent->d_name, "..")))
+ continue;
+ if (lstat(dent->d_name, &st)) {
+ com_err(__func__, errno, _("while lstat \"%s\""),
+ dent->d_name);
+ goto out;
+ }
+ name = dent->d_name;
+
+ /* Check for hardlinks */
+ save_inode = 0;
+ if (!S_ISDIR(st.st_mode) && !S_ISLNK(st.st_mode) &&
+ st.st_nlink > 1) {
+ hdlink = is_hardlink(hdlinks, st.st_dev, st.st_ino);
+ if (hdlink >= 0) {
+ retval = add_link(fs, parent_ino,
+ hdlinks->hdl[hdlink].dst_ino,
+ name);
+ if (retval) {
+ com_err(__func__, retval,
+ "while linking %s", name);
+ goto out;
+ }
+ continue;
+ } else
+ save_inode = 1;
+ }
+
+ switch(st.st_mode & S_IFMT) {
+ case S_IFCHR:
+ case S_IFBLK:
+ case S_IFIFO:
+ case S_IFSOCK:
+ retval = do_mknod_internal(fs, parent_ino, name, &st);
+ if (retval) {
+ com_err(__func__, retval,
+ _("while creating special file "
+ "\"%s\""), name);
+ goto out;
+ }
+ break;
+ case S_IFLNK:
+ read_cnt = readlink(name, ln_target,
+ sizeof(ln_target) - 1);
+ if (read_cnt == -1) {
+ com_err(__func__, errno,
+ _("while trying to readlink \"%s\""),
+ name);
+ retval = errno;
+ goto out;
+ }
+ ln_target[read_cnt] = '\0';
+ retval = do_symlink_internal(fs, parent_ino, name,
+ ln_target, root);
+ if (retval) {
+ com_err(__func__, retval,
+ _("while writing symlink\"%s\""),
+ name);
+ goto out;
+ }
+ break;
+ case S_IFREG:
+ retval = do_write_internal(fs, parent_ino, name, name,
+ root);
+ if (retval) {
+ com_err(__func__, retval,
+ _("while writing file \"%s\""), name);
+ goto out;
+ }
+ break;
+ case S_IFDIR:
+ retval = do_mkdir_internal(fs, parent_ino, name, &st,
+ root);
+ if (retval) {
+ com_err(__func__, retval,
+ _("while making dir \"%s\""), name);
+ goto out;
+ }
+ retval = ext2fs_namei(fs, root, parent_ino,
+ name, &ino);
+ if (retval) {
+ com_err(name, retval, 0);
+ goto out;
+ }
+ /* Populate the dir recursively*/
+ retval = __populate_fs(fs, ino, name, root, hdlinks);
+ if (retval) {
+ com_err(__func__, retval,
+ _("while adding dir \"%s\""), name);
+ goto out;
+ }
+ if (chdir("..")) {
+ com_err(__func__, errno, _("during cd .."));
+ retval = errno;
+ goto out;
+ }
+ break;
+ default:
+ com_err(__func__, 0,
+ _("ignoring entry \"%s\""), name);
+ }
+
+ retval = ext2fs_namei(fs, root, parent_ino, name, &ino);
+ if (retval) {
+ com_err(name, retval, 0);
+ goto out;
+ }
+
+ retval = set_inode_extra(fs, parent_ino, ino, &st);
+ if (retval) {
+ com_err(__func__, retval,
+ _("while setting inode for \"%s\""), name);
+ goto out;
+ }
+
+ /* Save the hardlink ino */
+ if (save_inode) {
+ /*
+ * Check whether need more memory, and we don't need
+ * free() since the lifespan will be over after the fs
+ * populated.
+ */
+ if (hdlinks->count == hdlinks->size) {
+ void *p = realloc(hdlinks->hdl,
+ (hdlinks->size + HDLINK_CNT) *
+ sizeof(struct hdlink_s));
+ if (p == NULL) {
+ com_err(name, errno,
+ _("Not enough memory"));
+ retval = EXT2_ET_NO_MEMORY;
+ goto out;
+ }
+ hdlinks->hdl = p;
+ hdlinks->size += HDLINK_CNT;
+ }
+ hdlinks->hdl[hdlinks->count].src_dev = st.st_dev;
+ hdlinks->hdl[hdlinks->count].src_ino = st.st_ino;
+ hdlinks->hdl[hdlinks->count].dst_ino = ino;
+ hdlinks->count++;
+ }
+ }
+
+out:
+ closedir(dh);
+ return retval;
+}
+
+errcode_t populate_fs(ext2_filsys fs, ext2_ino_t parent_ino,
+ const char *source_dir, ext2_ino_t root)
+{
+ struct hdlinks_s hdlinks;
+ errcode_t retval;
+
+ hdlinks.count = 0;
+ hdlinks.size = HDLINK_CNT;
+ hdlinks.hdl = realloc(NULL, hdlinks.size * sizeof(struct hdlink_s));
+ if (hdlinks.hdl == NULL) {
+ com_err(__func__, errno, "Not enough memory");
+ return errno;
+ }
+
+ retval = __populate_fs(fs, parent_ino, source_dir, root, &hdlinks);
+
+ free(hdlinks.hdl);
+ return retval;
+}
projects / thirdparty / e2fsprogs.git / commitdiff
