}
/* Transfers file attributes from a struct dentry to a `stat' buffer. */
-void dentry_to_stbuf(const struct dentry *dentry, struct stat *stbuf,
- const struct lookup_table *table)
+int dentry_to_stbuf(const struct dentry *dentry, struct stat *stbuf,
+ const struct lookup_table *table)
{
struct lookup_table_entry *lte;
else
stbuf->st_mode = S_IFREG | 0644;
- if (table)
- lte = __lookup_resource(table, dentry_hash(dentry));
- else
- lte = NULL;
+ stbuf->st_ino = (ino_t)dentry->hard_link;
+
+ stbuf->st_nlink = dentry_link_group_size(dentry);
+ stbuf->st_uid = getuid();
+ stbuf->st_gid = getgid();
- if (lte) {
- stbuf->st_nlink = lte->refcnt;
- stbuf->st_size = lte->resource_entry.original_size;
+ /* Use the size of the unnamed (default) file stream. */
+ if (table && (lte = __lookup_resource(table, dentry_hash(dentry)))) {
+ if (lte->staging_file_name) {
+ struct stat native_stat;
+ if (stat(lte->staging_file_name, &native_stat) != 0)
+ return -errno;
+ stbuf->st_size = native_stat.st_size;
+ } else {
+ stbuf->st_size = lte->resource_entry.original_size;
+ }
} else {
- stbuf->st_nlink = 1;
stbuf->st_size = 0;
}
- stbuf->st_uid = getuid();
- stbuf->st_gid = getgid();
+
stbuf->st_atime = ms_timestamp_to_unix(dentry->last_access_time);
stbuf->st_mtime = ms_timestamp_to_unix(dentry->last_write_time);
stbuf->st_ctime = ms_timestamp_to_unix(dentry->creation_time);
stbuf->st_blocks = (stbuf->st_size + 511) / 512;
+ return 0;
}
/* Makes all timestamp fields for the dentry be the current time. */
{
destroy_ads_entry(sentry);
memcpy(sentry, sentry + 1,
- (dentry->num_ads - (sentry - dentry->ads_entries))
+ (dentry->num_ads - (sentry - dentry->ads_entries + 1))
* sizeof(struct ads_entry));
dentry->num_ads--;
}
memset(dentry, 0, sizeof(struct dentry));
dentry->refcnt = 1;
dentry->security_id = -1;
+ dentry->link_group_master_status = GROUP_SLAVE;
}
/*
dentry->next = dentry;
dentry->prev = dentry;
dentry->parent = dentry;
+ INIT_LIST_HEAD(&dentry->link_group_list);
return dentry;
err:
FREE(dentry);
return NULL;
}
-static void dentry_free_ads_entries(struct dentry *dentry)
+void dentry_free_ads_entries(struct dentry *dentry)
{
for (u16 i = 0; i < dentry->num_ads; i++)
destroy_ads_entry(&dentry->ads_entries[i]);
dentry->num_ads = 0;
}
-
-void free_dentry(struct dentry *dentry)
+static void __destroy_dentry(struct dentry *dentry)
{
FREE(dentry->file_name);
FREE(dentry->file_name_utf8);
FREE(dentry->short_name);
FREE(dentry->full_path_utf8);
- dentry_free_ads_entries(dentry);
+}
+
+void free_dentry(struct dentry *dentry)
+{
+ __destroy_dentry(dentry);
+ if (dentry->link_group_master_status != GROUP_SLAVE)
+ dentry_free_ads_entries(dentry);
FREE(dentry);
}
+void put_dentry(struct dentry *dentry)
+{
+ if (dentry->link_group_master_status == GROUP_MASTER) {
+ struct dentry *new_master;
+ list_for_each_entry(new_master, &dentry->link_group_list,
+ link_group_list)
+ {
+ if (new_master->link_group_master_status == GROUP_SLAVE) {
+ new_master->link_group_master_status = GROUP_MASTER;
+ dentry->link_group_master_status = GROUP_SLAVE;
+ break;
+ }
+ }
+ }
+ struct list_head *next;
+ next = dentry->link_group_list.next;
+ list_del(&dentry->link_group_list);
+ /*if (next->next == next)*/
+ /*container_of(next, struct dentry, link_group_list)->hard_link = 0;*/
+ free_dentry(dentry);
+}
+
+static bool dentries_have_same_ads(const struct dentry *d1,
+ const struct dentry *d2)
+{
+ /* Verify stream names and hashes are the same */
+ for (u16 i = 0; i < d1->num_ads; i++) {
+ if (strcmp(d1->ads_entries[i].stream_name_utf8,
+ d2->ads_entries[i].stream_name_utf8) != 0)
+ return false;
+ if (memcmp(d1->ads_entries[i].hash,
+ d2->ads_entries[i].hash,
+ WIM_HASH_SIZE) != 0)
+ return false;
+ }
+ return true;
+}
+
+/* Share the alternate stream entries between hard-linked dentries. */
+int share_dentry_ads(struct dentry *master, struct dentry *slave)
+{
+ const char *mismatch_type;
+ wimlib_assert(master->num_ads == 0 ||
+ master->ads_entries != slave->ads_entries);
+ if (master->attributes != slave->attributes) {
+ mismatch_type = "attributes";
+ goto mismatch;
+ }
+ if (master->attributes & FILE_ATTRIBUTE_DIRECTORY) {
+ ERROR("`%s' is hard-linked to `%s', which is a directory ",
+ slave->full_path_utf8, master->full_path_utf8);
+ return WIMLIB_ERR_INVALID_DENTRY;
+ }
+ if (master->security_id != slave->security_id) {
+ mismatch_type = "security ID";
+ goto mismatch;
+ }
+ if (memcmp(master->hash, slave->hash, WIM_HASH_SIZE) != 0) {
+ mismatch_type = "main file resource";
+ goto mismatch;
+ }
+ if (!dentries_have_same_ads(master, slave)) {
+ mismatch_type = "Alternate Stream Entries";
+ goto mismatch;
+ }
+ dentry_free_ads_entries(slave);
+ slave->ads_entries = master->ads_entries;
+ slave->link_group_master_status = GROUP_SLAVE;
+ return 0;
+mismatch:
+ ERROR("Dentries `%s' and `%s' in the same hard-link group but "
+ "do not share the same %s",
+ master->full_path_utf8, slave->full_path_utf8,
+ mismatch_type);
+ return WIMLIB_ERR_INVALID_DENTRY;
+}
+
+/* clones a dentry.
+ *
+ * Beware:
+ * - memory for file names is not cloned
+ * - next, prev, and children pointers and not touched
+ * - stream entries are not cloned.
+ */
+struct dentry *clone_dentry(struct dentry *old)
+{
+ struct dentry *new = MALLOC(sizeof(struct dentry));
+ if (!new)
+ return NULL;
+ memcpy(new, old, sizeof(struct dentry));
+ new->file_name = NULL;
+ new->file_name_len = 0;
+ new->file_name_utf8 = NULL;
+ new->file_name_utf8_len = 0;
+ new->short_name = NULL;
+ new->short_name_len = 0;
+ return new;
+}
+
/* Arguments for do_free_dentry(). */
struct free_dentry_args {
struct lookup_table *lookup_table;
}
}
-/* Unlink a dentry from the directory tree. */
+
+/* Unlink a dentry from the directory tree.
+ *
+ * Note: This merely removes it from the in-memory tree structure. See
+ * remove_dentry() in mount.c for a function implemented on top of this one that
+ * frees the dentry and implements reference counting for the lookup table
+ * entries. */
void unlink_dentry(struct dentry *dentry)
{
if (dentry_is_root(dentry))
dentry->length = (dentry->length + 7) & ~7;
}
-static int do_name_change(char **file_name_ret,
- char **file_name_utf8_ret,
- u16 *file_name_len_ret,
- u16 *file_name_utf8_len_ret,
- const char *new_name)
+int get_names(char **name_utf16_ret, char **name_utf8_ret,
+ u16 *name_utf16_len_ret, u16 *name_utf8_len_ret,
+ const char *name)
{
size_t utf8_len;
size_t utf16_len;
- char *file_name, *file_name_utf8;
+ char *name_utf16, *name_utf8;
- utf8_len = strlen(new_name);
+ utf8_len = strlen(name);
- file_name = utf8_to_utf16(new_name, utf8_len, &utf16_len);
+ name_utf16 = utf8_to_utf16(name, utf8_len, &utf16_len);
- if (!file_name)
+ if (!name_utf16)
return WIMLIB_ERR_NOMEM;
- file_name_utf8 = MALLOC(utf8_len + 1);
- if (!file_name_utf8) {
- FREE(file_name);
+ name_utf8 = MALLOC(utf8_len + 1);
+ if (!name_utf8) {
+ FREE(name_utf8);
return WIMLIB_ERR_NOMEM;
}
- memcpy(file_name_utf8, new_name, utf8_len + 1);
-
- FREE(*file_name_ret);
- FREE(*file_name_utf8_ret);
- *file_name_ret = file_name;
- *file_name_utf8_ret = file_name_utf8;
- *file_name_len_ret = utf16_len;
- *file_name_utf8_len_ret = utf8_len;
+ memcpy(name_utf8, name, utf8_len + 1);
+ FREE(*name_utf8_ret);
+ FREE(*name_utf16_ret);
+ *name_utf8_ret = name_utf8;
+ *name_utf16_ret = name_utf16;
+ *name_utf8_len_ret = utf8_len;
+ *name_utf16_len_ret = utf16_len;
return 0;
}
{
int ret;
- ret = do_name_change(&dentry->file_name, &dentry->file_name_utf8,
- &dentry->file_name_len, &dentry->file_name_utf8_len,
- new_name);
+ ret = get_names(&dentry->file_name, &dentry->file_name_utf8,
+ &dentry->file_name_len, &dentry->file_name_utf8_len,
+ new_name);
if (ret == 0)
recalculate_dentry_size(dentry);
return ret;
int change_ads_name(struct ads_entry *entry, const char *new_name)
{
- return do_name_change(&entry->stream_name, &entry->stream_name_utf8,
- &entry->stream_name_len,
- &entry->stream_name_utf8_len,
- new_name);
+ return get_names(&entry->stream_name, &entry->stream_name_utf8,
+ &entry->stream_name_len,
+ &entry->stream_name_utf8_len,
+ new_name);
}
/* Parameters for calculate_dentry_statistics(). */
*/
if (dentry->attributes & FILE_ATTRIBUTE_REPARSE_POINT) {
/* ??? */
- u32 u1, u2;
- p = get_u32(p, &u1);
- /*p += 4;*/
+ p += 4;
p = get_u32(p, &dentry->reparse_tag);
- p = get_u32(p, &u2);
- /*p += 4;*/
- dentry->hard_link = (u64)(u1) | ((u64)(u2) << 32);
+ p += 4;
} else {
p = get_u32(p, &dentry->reparse_tag);
p = get_u64(p, &dentry->hard_link);
{
u8 *orig_p = p;
unsigned padding;
- memset(p, 0, dentry->length);
+
p = put_u64(p, dentry->length);
p = put_u32(p, dentry->attributes);
p = put_u32(p, dentry->security_id);
p = put_u64(p, dentry->creation_time);
p = put_u64(p, dentry->last_access_time);
p = put_u64(p, dentry->last_write_time);
- memcpy(p, dentry->hash, WIM_HASH_SIZE);
- p += WIM_HASH_SIZE;
- p = put_u32(p, dentry->reparse_tag);
- p = put_u64(p, dentry->hard_link);
- p = put_u16(p, dentry->num_ads); /*streams */
+ p = put_bytes(p, WIM_HASH_SIZE, dentry->hash);
+ if (dentry->attributes & FILE_ATTRIBUTE_REPARSE_POINT) {
+ p = put_zeroes(p, 4);
+ p = put_u32(p, dentry->reparse_tag);
+ p = put_zeroes(p, 4);
+ } else {
+ u64 hard_link;
+ p = put_u32(p, dentry->reparse_tag);
+ if (dentry->link_group_list.next == &dentry->link_group_list)
+ hard_link = 0;
+ else
+ hard_link = dentry->hard_link;
+ p = put_u64(p, hard_link);
+ }
+ p = put_u16(p, dentry->num_ads);
p = put_u16(p, dentry->short_name_len);
p = put_u16(p, dentry->file_name_len);
p = put_bytes(p, dentry->file_name_len, (u8*)dentry->file_name);
/* write end of directory entry */
p = put_u64(p, 0);
} else {
- /* Nothing to do for a regular file. */
- if (dentry_is_regular_file(tree))
+ /* Nothing to do for non-directories */
+ if (!dentry_is_directory(tree))
return p;
}
dentry->children = first_child;
return ret;
}
-
-int dentry_set_symlink_buf(struct dentry *dentry, const u8 symlink_buf_hash[])
-{
- struct ads_entry *ads_entries;
-
- ads_entries = CALLOC(2, sizeof(struct ads_entry));
- if (!ads_entries)
- return WIMLIB_ERR_NOMEM;
- memcpy(ads_entries[1].hash, symlink_buf_hash, WIM_HASH_SIZE);
- dentry_free_ads_entries(dentry);
- dentry->num_ads = 2;
- dentry->ads_entries = ads_entries;
- return 0;
-}
git://wimlib.net / wimlib / blobdiff