*/
/*
- * Copyright (C) 2015-2016 Eric Biggers
+ * Copyright (C) 2015-2017 Eric Biggers
*
* This file is free software; you can redistribute it and/or modify it under
* the terms of the GNU Lesser General Public License as published by the Free
#include <ctype.h>
#include <math.h>
+#include <stdlib.h>
+#include <sys/stat.h>
+#include <unistd.h>
#include "wimlib.h"
#include "wimlib/endianness.h"
#include "wimlib/scan.h"
#include "wimlib/security_descriptor.h"
#include "wimlib/test_support.h"
+#include "wimlib/unix_data.h"
+#include "wimlib/xattr.h"
/*----------------------------------------------------------------------------*
* File tree generation *
return p - (u8 *)desc;
}
+static bool
+am_root(void)
+{
+#ifdef __WIN32__
+ return false;
+#else
+ return (getuid() == 0);
+#endif
+}
+
+static u32
+generate_uid(void)
+{
+#ifdef __WIN32__
+ return 0;
+#else
+ if (am_root())
+ return rand32();
+ return getuid();
+#endif
+}
+
+static u32
+generate_gid(void)
+{
+#ifdef __WIN32__
+ return 0;
+#else
+ if (am_root())
+ return rand32();
+ return getgid();
+#endif
+}
+
+#ifdef __WIN32__
+# ifndef S_IFLNK
+# define S_IFLNK 0120000
+# endif
+# ifndef S_IFSOCK
+# define S_IFSOCK 0140000
+# endif
+#endif
+
+static int
+set_random_unix_metadata(struct wim_inode *inode)
+{
+ struct wimlib_unix_data dat;
+
+ dat.uid = generate_uid();
+ dat.gid = generate_gid();
+ if (inode_is_symlink(inode))
+ dat.mode = S_IFLNK | 0777;
+ else if (inode->i_attributes & FILE_ATTRIBUTE_DIRECTORY)
+ dat.mode = S_IFDIR | 0700 | (rand32() % 07777);
+ else if (is_zero_hash(inode_get_hash_of_unnamed_data_stream(inode)) &&
+ randbool() && am_root())
+ {
+ dat.mode = rand32() % 07777;
+ switch (rand32() % 4) {
+ case 0:
+ dat.mode |= S_IFIFO;
+ break;
+ case 1:
+ dat.mode |= S_IFCHR;
+ dat.rdev = 261; /* /dev/zero */
+ break;
+ case 2:
+ dat.mode |= S_IFBLK;
+ dat.rdev = 261; /* /dev/zero */
+ break;
+ default:
+ dat.mode |= S_IFSOCK;
+ break;
+ }
+ } else {
+ dat.mode = S_IFREG | 0400 | (rand32() % 07777);
+ }
+ dat.rdev = 0;
+
+ if (!inode_set_unix_data(inode, &dat, UNIX_DATA_ALL))
+ return WIMLIB_ERR_NOMEM;
+
+ return 0;
+}
+
+static noinline_for_stack int
+set_random_xattrs(struct wim_inode *inode)
+{
+ int num_xattrs = 1 + rand32() % 16;
+ char entries[8192] _aligned_attribute(4);
+ struct wimlib_xattr_entry *entry = (void *)entries;
+ size_t entries_size;
+ struct wimlib_unix_data unix_data;
+ const char *prefix = "user.";
+ static const char capability_name[] = "security.capability";
+ bool generated_capability_xattr = false;
+
+ /*
+ * On Linux, xattrs in the "user" namespace are only permitted on
+ * regular files and directories. For other types of files we can use
+ * the "trusted" namespace, but this requires root.
+ */
+ if (inode_is_symlink(inode) ||
+ (inode_get_unix_data(inode, &unix_data) &&
+ !S_ISREG(unix_data.mode) && !S_ISDIR(unix_data.mode)))
+ {
+ if (!am_root())
+ return 0;
+ prefix = "trusted.";
+ }
+
+ for (int i = 0; i < num_xattrs; i++) {
+ int value_len = rand32() % 64;
+ u8 *p;
+
+ entry->reserved = 0;
+ entry->value_len = cpu_to_le32(value_len);
+
+ if (rand32() % 16 == 0 && am_root() &&
+ !generated_capability_xattr) {
+ int name_len = sizeof(capability_name) - 1;
+ entry->name_len = cpu_to_le16(name_len);
+ p = mempcpy(entry->name, capability_name, name_len);
+ generated_capability_xattr = true;
+ } else {
+ int name_len = 1 + rand32() % 64;
+
+ entry->name_len = cpu_to_le16(strlen(prefix) + name_len);
+ p = mempcpy(entry->name, prefix, strlen(prefix));
+ *p++ = 'a' + i;
+ for (int j = 1; j < name_len; j++) {
+ do {
+ *p = rand8();
+ } while (*p == '\0');
+ p++;
+ }
+ }
+ for (int j = 0; j < value_len; j++)
+ *p++ = rand8();
+
+ while ((uintptr_t)p % 4)
+ *p++ = 0;
+
+ entry = (void *)p;
+ }
+
+ entries_size = (char *)entry - entries;
+ wimlib_assert(entries_size > 0 && entries_size % 4 == 0 &&
+ entries_size <= sizeof(entries));
+
+ if (!inode_set_linux_xattrs(inode, entries, entries_size))
+ return WIMLIB_ERR_NOMEM;
+
+ return 0;
+}
+
static int
set_random_metadata(struct wim_inode *inode, struct generation_context *ctx)
{
return WIMLIB_ERR_NOMEM;
}
+ /* Standard UNIX permissions and special files */
+ if (rand32() % 16 == 0) {
+ int ret = set_random_unix_metadata(inode);
+ if (ret)
+ return ret;
+ }
+
+ /* Extended attributes */
+ if (rand32() % 32 == 0) {
+ int ret = set_random_xattrs(inode);
+ if (ret)
+ return ret;
+ }
+
return 0;
}
return 0;
}
+static int
+cmp_unix_metadata(const struct wim_inode *inode1,
+ const struct wim_inode *inode2, int cmp_flags)
+{
+ struct wimlib_unix_data dat1, dat2;
+ bool present1, present2;
+
+ present1 = inode_get_unix_data(inode1, &dat1);
+ present2 = inode_get_unix_data(inode2, &dat2);
+
+ if (!present1 && !present2)
+ return 0;
+
+ if (present1 && !present2) {
+ if (cmp_flags & (WIMLIB_CMP_FLAG_NTFS_3G_MODE |
+ WIMLIB_CMP_FLAG_WINDOWS_MODE))
+ return 0;
+ ERROR("%"TS" unexpectedly lost its UNIX metadata",
+ inode_any_full_path(inode1));
+ return WIMLIB_ERR_IMAGES_ARE_DIFFERENT;
+ }
+
+ if (!present1 && present2) {
+ if (cmp_flags & WIMLIB_CMP_FLAG_UNIX_MODE)
+ return 0;
+ ERROR("%"TS" unexpectedly gained UNIX metadata",
+ inode_any_full_path(inode1));
+ return WIMLIB_ERR_IMAGES_ARE_DIFFERENT;
+ }
+
+ if (memcmp(&dat1, &dat2, sizeof(dat1)) != 0) {
+ ERROR("UNIX metadata of %"TS" differs: "
+ "[uid=%u, gid=%u, mode=0%o, rdev=%u] vs. "
+ "[uid=%u, gid=%u, mode=0%o, rdev=%u]",
+ inode_any_full_path(inode1),
+ dat1.uid, dat1.gid, dat1.mode, dat1.rdev,
+ dat2.uid, dat2.gid, dat2.mode, dat2.rdev);
+ return WIMLIB_ERR_IMAGES_ARE_DIFFERENT;
+ }
+
+ return 0;
+}
+
+static int
+cmp_xattr_names(const void *p1, const void *p2)
+{
+ const struct wimlib_xattr_entry *entry1 = *(const struct wimlib_xattr_entry **)p1;
+ const struct wimlib_xattr_entry *entry2 = *(const struct wimlib_xattr_entry **)p2;
+ u16 name_len1 = le16_to_cpu(entry1->name_len);
+ u16 name_len2 = le16_to_cpu(entry2->name_len);
+ int res;
+
+ res = cmp_u32(name_len1, name_len2);
+ if (res)
+ return res;
+
+ return memcmp(entry1->name, entry2->name, name_len1);
+}
+
+/* Validate and sort by name a list of extended attributes */
+static int
+parse_xattrs(const void *xattrs, u32 len,
+ const struct wimlib_xattr_entry *entries[],
+ u32 *num_entries_p)
+{
+ u32 limit = *num_entries_p;
+ u32 num_entries = 0;
+ const struct wimlib_xattr_entry *entry = xattrs;
+
+ while ((void *)entry < xattrs + len) {
+ if (!valid_xattr_entry(entry, xattrs + len - (void *)entry)) {
+ ERROR("Invalid xattr entry");
+ return WIMLIB_ERR_INVALID_XATTR;
+ }
+ if (num_entries >= limit) {
+ ERROR("Too many xattr entries");
+ return WIMLIB_ERR_INVALID_XATTR;
+ }
+ entries[num_entries++] = entry;
+ entry = xattr_entry_next(entry);
+ }
+
+ if (num_entries == 0) {
+ ERROR("No xattr entries");
+ return WIMLIB_ERR_INVALID_XATTR;
+ }
+
+ qsort(entries, num_entries, sizeof(entries[0]), cmp_xattr_names);
+
+ for (u32 i = 1; i < num_entries; i++) {
+ if (cmp_xattr_names(&entries[i - 1], &entries[i]) == 0) {
+ ERROR("Duplicate xattr names");
+ return WIMLIB_ERR_INVALID_XATTR;
+ }
+ }
+
+ *num_entries_p = num_entries;
+ return 0;
+}
+
+static int
+cmp_linux_xattrs(const struct wim_inode *inode1,
+ const struct wim_inode *inode2, int cmp_flags)
+{
+ const void *xattrs1, *xattrs2;
+ u32 len1, len2;
+
+ xattrs1 = inode_get_linux_xattrs(inode1, &len1);
+ xattrs2 = inode_get_linux_xattrs(inode2, &len2);
+
+ if (!xattrs1 && !xattrs2) {
+ return 0;
+ } else if (xattrs1 && !xattrs2) {
+ if (cmp_flags & (WIMLIB_CMP_FLAG_NTFS_3G_MODE |
+ WIMLIB_CMP_FLAG_WINDOWS_MODE))
+ return 0;
+ ERROR("%"TS" unexpectedly lost its xattrs",
+ inode_any_full_path(inode1));
+ return WIMLIB_ERR_IMAGES_ARE_DIFFERENT;
+ } else if (!xattrs1 && xattrs2) {
+ ERROR("%"TS" unexpectedly gained xattrs",
+ inode_any_full_path(inode1));
+ return WIMLIB_ERR_IMAGES_ARE_DIFFERENT;
+ } else {
+ const int max_entries = 64;
+ const struct wimlib_xattr_entry *entries1[max_entries];
+ const struct wimlib_xattr_entry *entries2[max_entries];
+ u32 xattr_count1 = max_entries;
+ u32 xattr_count2 = max_entries;
+ int ret;
+
+ ret = parse_xattrs(xattrs1, len1, entries1, &xattr_count1);
+ if (ret) {
+ ERROR("%"TS": invalid xattrs",
+ inode_any_full_path(inode1));
+ return ret;
+ }
+ ret = parse_xattrs(xattrs2, len2, entries2, &xattr_count2);
+ if (ret) {
+ ERROR("%"TS": invalid xattrs",
+ inode_any_full_path(inode2));
+ return ret;
+ }
+ if (xattr_count1 != xattr_count2) {
+ ERROR("%"TS": number of xattrs changed. had %u "
+ "before, now has %u", inode_any_full_path(inode1),
+ xattr_count1, xattr_count2);
+ }
+ for (u32 i = 0; i < xattr_count1; i++) {
+ const struct wimlib_xattr_entry *entry1 = entries1[i];
+ const struct wimlib_xattr_entry *entry2 = entries2[i];
+
+ if (entry1->name_len != entry2->name_len ||
+ entry1->value_len != entry2->value_len ||
+ entry1->reserved != entry2->reserved ||
+ memcmp(entry1->name, entry2->name,
+ le16_to_cpu(entry1->name_len)) ||
+ memcmp(entry1->name + le16_to_cpu(entry1->name_len),
+ entry2->name + le16_to_cpu(entry1->name_len),
+ le32_to_cpu(entry1->value_len)))
+ {
+ ERROR("xattr %.*s of %"TS" differs",
+ le16_to_cpu(entry1->name_len),
+ entry1->name, inode_any_full_path(inode1));
+ return WIMLIB_ERR_IMAGES_ARE_DIFFERENT;
+ }
+ }
+ return 0;
+ }
+}
+
+static int
+cmp_timestamps(const struct wim_inode *inode1, const struct wim_inode *inode2,
+ int cmp_flags)
+{
+ if (inode1->i_creation_time != inode2->i_creation_time &&
+ !(cmp_flags & WIMLIB_CMP_FLAG_UNIX_MODE)) {
+ ERROR("Creation time of %"TS" differs",
+ inode_any_full_path(inode1));
+ return WIMLIB_ERR_IMAGES_ARE_DIFFERENT;
+ }
+
+ if (inode1->i_last_write_time != inode2->i_last_write_time) {
+ ERROR("Last write time of %"TS" differs",
+ inode_any_full_path(inode1));
+ return WIMLIB_ERR_IMAGES_ARE_DIFFERENT;
+ }
+
+ if (inode1->i_last_access_time != inode2->i_last_access_time) {
+ ERROR("Last access time of %"TS" differs",
+ inode_any_full_path(inode1));
+ return WIMLIB_ERR_IMAGES_ARE_DIFFERENT;
+ }
+
+ return 0;
+}
+
static int
cmp_inodes(const struct wim_inode *inode1, const struct wim_inode *inode2,
const struct wim_image_metadata *imd1,
if (ret)
return ret;
+ /* Compare timestamps */
+ ret = cmp_timestamps(inode1, inode2, cmp_flags);
+ if (ret)
+ return ret;
+
+ /* Compare standard UNIX metadata */
+ ret = cmp_unix_metadata(inode1, inode2, cmp_flags);
+ if (ret)
+ return ret;
+
+ /* Compare Linux-style xattrs */
+ ret = cmp_linux_xattrs(inode1, inode2, cmp_flags);
+ if (ret)
+ return ret;
+
return 0;
}
git://wimlib.net / wimlib / blobdiff