*/
#include "make_ext4fs.h"
-#include "output_file.h"
#include "ext4_utils.h"
#include "allocate.h"
#include "contents.h"
#include "uuid.h"
-#include "backed_block.h"
+#include "wipe.h"
+
+#include <sparse/sparse.h>
#include <assert.h>
#include <dirent.h>
+#include <fcntl.h>
#include <libgen.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <sys/types.h>
-#ifdef ANDROID
-#include <private/android_filesystem_config.h>
-#endif
-
#ifdef USE_MINGW
#include <winsock2.h>
#define S_ISGID 0002000
#define S_ISVTX 0001000
+#else
+
+#include <selinux/selinux.h>
+#include <selinux/label.h>
+#include <selinux/android.h>
+
+#define O_BINARY 0
+
#endif
/* TODO: Not implemented:
#ifndef USE_MINGW
/* Read a local directory and create the same tree in the generated filesystem.
- Calls itself recursively with each directory in the given directory */
+ Calls itself recursively with each directory in the given directory.
+ full_path is an absolute or relative path, with a trailing slash, to the
+ directory on disk that should be copied, or NULL if this is a directory
+ that does not exist on disk (e.g. lost+found).
+ dir_path is an absolute path, with trailing slash, to the same directory
+ if the image were mounted at the specified mount point */
static u32 build_directory_structure(const char *full_path, const char *dir_path,
- u32 dir_inode, int android)
+ u32 dir_inode, fs_config_func_t fs_config_func,
+ struct selabel_handle *sehnd, int verbose)
{
int entries = 0;
struct dentry *dentries;
- struct dirent **namelist;
+ struct dirent **namelist = NULL;
struct stat stat;
int ret;
int i;
u32 inode;
u32 entry_inode;
u32 dirs = 0;
+ bool needs_lost_and_found = false;
+
+ if (full_path) {
+ entries = scandir(full_path, &namelist, filter_dot, (void*)alphasort);
+ if (entries < 0) {
+ error_errno("scandir");
+ return EXT4_ALLOCATE_FAILED;
+ }
+ }
- entries = scandir(full_path, &namelist, filter_dot, (void*)alphasort);
- if (entries < 0) {
- error_errno("scandir");
- return EXT4_ALLOCATE_FAILED;
+ if (dir_inode == 0) {
+ /* root directory, check if lost+found already exists */
+ for (i = 0; i < entries; i++)
+ if (strcmp(namelist[i]->d_name, "lost+found") == 0)
+ break;
+ if (i == entries)
+ needs_lost_and_found = true;
}
dentries = calloc(entries, sizeof(struct dentry));
if (dentries[i].filename == NULL)
critical_error_errno("strdup");
- asprintf(&dentries[i].path, "%s/%s", dir_path, namelist[i]->d_name);
- asprintf(&dentries[i].full_path, "%s/%s", full_path, namelist[i]->d_name);
+ asprintf(&dentries[i].path, "%s%s", dir_path, namelist[i]->d_name);
+ asprintf(&dentries[i].full_path, "%s%s", full_path, namelist[i]->d_name);
free(namelist[i]);
dentries[i].size = stat.st_size;
dentries[i].mode = stat.st_mode & (S_ISUID|S_ISGID|S_ISVTX|S_IRWXU|S_IRWXG|S_IRWXO);
dentries[i].mtime = stat.st_mtime;
- if (android) {
+ if (fs_config_func != NULL) {
#ifdef ANDROID
unsigned int mode = 0;
unsigned int uid = 0;
unsigned int gid = 0;
int dir = S_ISDIR(stat.st_mode);
- fs_config(dentries[i].path, dir, &uid, &gid, &mode);
+ fs_config_func(dentries[i].path, dir, &uid, &gid, &mode);
dentries[i].mode = mode;
dentries[i].uid = uid;
dentries[i].gid = gid;
error("can't set android permissions - built without android support");
#endif
}
+#ifndef USE_MINGW
+ if (sehnd) {
+ if (selabel_lookup(sehnd, &dentries[i].secon, dentries[i].path, stat.st_mode) < 0) {
+ error("cannot lookup security context for %s", dentries[i].path);
+ }
+
+ if (dentries[i].secon && verbose)
+ printf("Labeling %s as %s\n", dentries[i].path, dentries[i].secon);
+ }
+#endif
if (S_ISREG(stat.st_mode)) {
dentries[i].file_type = EXT4_FT_REG_FILE;
}
free(namelist);
+ if (needs_lost_and_found) {
+ /* insert a lost+found directory at the beginning of the dentries */
+ struct dentry *tmp = calloc(entries + 1, sizeof(struct dentry));
+ memset(tmp, 0, sizeof(struct dentry));
+ memcpy(tmp + 1, dentries, entries * sizeof(struct dentry));
+ dentries = tmp;
+
+ dentries[0].filename = strdup("lost+found");
+ asprintf(&dentries[0].path, "%slost+found", dir_path);
+ dentries[0].full_path = NULL;
+ dentries[0].size = 0;
+ dentries[0].mode = S_IRWXU;
+ dentries[0].file_type = EXT4_FT_DIR;
+ dentries[0].uid = 0;
+ dentries[0].gid = 0;
+ if (sehnd) {
+ if (selabel_lookup(sehnd, &dentries[0].secon, dentries[0].path, dentries[0].mode) < 0)
+ error("cannot lookup security context for %s", dentries[0].path);
+ }
+ entries++;
+ dirs++;
+ }
+
inode = make_directory(dir_inode, entries, dentries, dirs);
for (i = 0; i < entries; i++) {
if (dentries[i].file_type == EXT4_FT_REG_FILE) {
entry_inode = make_file(dentries[i].full_path, dentries[i].size);
} else if (dentries[i].file_type == EXT4_FT_DIR) {
- entry_inode = build_directory_structure(dentries[i].full_path,
- dentries[i].path, inode, android);
+ char *subdir_full_path = NULL;
+ char *subdir_dir_path;
+ if (dentries[i].full_path) {
+ ret = asprintf(&subdir_full_path, "%s/", dentries[i].full_path);
+ if (ret < 0)
+ critical_error_errno("asprintf");
+ }
+ ret = asprintf(&subdir_dir_path, "%s/", dentries[i].path);
+ if (ret < 0)
+ critical_error_errno("asprintf");
+ entry_inode = build_directory_structure(subdir_full_path,
+ subdir_dir_path, inode, fs_config_func, sehnd, verbose);
+ free(subdir_full_path);
+ free(subdir_dir_path);
} else if (dentries[i].file_type == EXT4_FT_SYMLINK) {
- entry_inode = make_link(dentries[i].full_path, dentries[i].link);
+ entry_inode = make_link(dentries[i].link);
} else {
error("unknown file type on %s", dentries[i].path);
entry_inode = 0;
dentries[i].mtime);
if (ret)
error("failed to set permissions on %s\n", dentries[i].path);
+ ret = inode_set_selinux(entry_inode, dentries[i].secon);
+ if (ret)
+ error("failed to set SELinux context on %s\n", dentries[i].path);
free(dentries[i].path);
free(dentries[i].full_path);
free(dentries[i].link);
free((void *)dentries[i].filename);
+ free(dentries[i].secon);
}
free(dentries);
// can be called again.
memset(&info, 0, sizeof(info));
memset(&aux_info, 0, sizeof(aux_info));
- free_data_blocks();
+
+ if (info.sparse_file) {
+ sparse_file_destroy(info.sparse_file);
+ info.sparse_file = NULL;
+ }
+}
+
+int make_ext4fs_sparse_fd(int fd, long long len,
+ const char *mountpoint, struct selabel_handle *sehnd)
+{
+ reset_ext4fs_info();
+ info.len = len;
+
+ return make_ext4fs_internal(fd, NULL, mountpoint, NULL, 0, 1, 0, 0, sehnd, 0);
+}
+
+int make_ext4fs(const char *filename, long long len,
+ const char *mountpoint, struct selabel_handle *sehnd)
+{
+ int fd;
+ int status;
+
+ reset_ext4fs_info();
+ info.len = len;
+
+ fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0644);
+ if (fd < 0) {
+ error_errno("open");
+ return EXIT_FAILURE;
+ }
+
+ status = make_ext4fs_internal(fd, NULL, mountpoint, NULL, 0, 0, 0, 1, sehnd, 0);
+ close(fd);
+
+ return status;
+}
+
+/* return a newly-malloc'd string that is a copy of str. The new string
+ is guaranteed to have a trailing slash. If absolute is true, the new string
+ is also guaranteed to have a leading slash.
+*/
+static char *canonicalize_slashes(const char *str, bool absolute)
+{
+ char *ret;
+ int len = strlen(str);
+ int newlen = len;
+ char *ptr;
+
+ if (len == 0 && absolute) {
+ return strdup("/");
+ }
+
+ if (str[0] != '/' && absolute) {
+ newlen++;
+ }
+ if (str[len - 1] != '/') {
+ newlen++;
+ }
+ ret = malloc(newlen + 1);
+ if (!ret) {
+ critical_error("malloc");
+ }
+
+ ptr = ret;
+ if (str[0] != '/' && absolute) {
+ *ptr++ = '/';
+ }
+
+ strcpy(ptr, str);
+ ptr += len;
+
+ if (str[len - 1] != '/') {
+ *ptr++ = '/';
+ }
+
+ if (ptr != ret + newlen) {
+ critical_error("assertion failed\n");
+ }
+
+ *ptr = '\0';
+
+ return ret;
}
-int make_ext4fs(const char *filename, s64 len)
+static char *canonicalize_abs_slashes(const char *str)
{
- reset_ext4fs_info();
- info.len = len;
- return make_ext4fs_internal(filename, NULL, NULL, 0, 0, 0, 0, 1, 0);
+ return canonicalize_slashes(str, true);
}
-int make_ext4fs_internal(const char *filename, const char *directory,
- char *mountpoint, int android, int gzip, int sparse,
- int crc, int wipe, int init_itabs)
+static char *canonicalize_rel_slashes(const char *str)
{
- u32 root_inode_num;
- u16 root_mode;
+ return canonicalize_slashes(str, false);
+}
+
+int make_ext4fs_internal(int fd, const char *_directory,
+ const char *_mountpoint, fs_config_func_t fs_config_func, int gzip,
+ int sparse, int crc, int wipe,
+ struct selabel_handle *sehnd, int verbose)
+{
+ u32 root_inode_num;
+ u16 root_mode;
+ char *mountpoint;
+ char *directory = NULL;
if (setjmp(setjmp_env))
return EXIT_FAILURE; /* Handle a call to longjmp() */
+ if (_mountpoint == NULL) {
+ mountpoint = strdup("");
+ } else {
+ mountpoint = canonicalize_abs_slashes(_mountpoint);
+ }
+
+ if (_directory) {
+ directory = canonicalize_rel_slashes(_directory);
+ }
+
if (info.len <= 0)
- info.len = get_file_size(filename);
+ info.len = get_file_size(fd);
if (info.len <= 0) {
fprintf(stderr, "Need size of filesystem\n");
- return EXIT_FAILURE;
+ return EXIT_FAILURE;
}
if (info.block_size <= 0)
info.feat_ro_compat |=
EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER |
- EXT4_FEATURE_RO_COMPAT_LARGE_FILE;
+ EXT4_FEATURE_RO_COMPAT_LARGE_FILE |
+ EXT4_FEATURE_RO_COMPAT_GDT_CSUM;
info.feat_incompat |=
EXT4_FEATURE_INCOMPAT_EXTENTS |
printf(" Block groups: %d\n", aux_info.groups);
printf(" Reserved block group size: %d\n", info.bg_desc_reserve_blocks);
+ info.sparse_file = sparse_file_new(info.block_size, info.len);
+
block_allocator_init();
ext4_fill_in_sb();
root_inode_num = build_default_directory_structure();
#else
if (directory)
- root_inode_num = build_directory_structure(directory, mountpoint, 0, android);
+ root_inode_num = build_directory_structure(directory, mountpoint, 0,
+ fs_config_func, sehnd, verbose);
else
root_inode_num = build_default_directory_structure();
#endif
root_mode = S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH;
inode_set_permissions(root_inode_num, root_mode, 0, 0, 0);
- ext4_update_free();
+#ifndef USE_MINGW
+ if (sehnd) {
+ char *secontext = NULL;
- if (init_itabs)
- init_unused_inode_tables();
+ if (selabel_lookup(sehnd, &secontext, mountpoint, S_IFDIR) < 0) {
+ error("cannot lookup security context for %s", mountpoint);
+ }
+ if (secontext) {
+ if (verbose) {
+ printf("Labeling %s as %s\n", mountpoint, secontext);
+ }
+ inode_set_selinux(root_inode_num, secontext);
+ }
+ freecon(secontext);
+ }
+#endif
+
+ ext4_update_free();
ext4_queue_sb();
aux_info.sb->s_blocks_count_lo - aux_info.sb->s_free_blocks_count_lo,
aux_info.sb->s_blocks_count_lo);
- write_ext4_image(filename, gzip, sparse, crc, wipe);
+ if (wipe)
+ wipe_block_device(fd, info.len);
+
+ write_ext4_image(fd, gzip, sparse, crc);
+
+ sparse_file_destroy(info.sparse_file);
+ info.sparse_file = NULL;
+
+ free(mountpoint);
+ free(directory);
return 0;
}
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