X-Git-Url: https://wimlib.net/git/?p=wimlib;a=blobdiff_plain;f=src%2Fdentry.c;h=aec94c3435c901778f73894459f208eef33e7db0;hp=a9d13f690d01afffde23d30f53017279b5ff19ff;hb=aa882e9bb92d998707484d7f6f56e9cf109a7c62;hpb=9b1647d673092a6c53a90c1d89831a5131660b9d diff --git a/src/dentry.c b/src/dentry.c index a9d13f69..aec94c34 100644 --- a/src/dentry.c +++ b/src/dentry.c @@ -39,17 +39,6 @@ #include "timestamp.h" #include "wimlib_internal.h" -/* - * Returns true if @dentry has the UTF-8 file name @name that has length - * @name_len. - */ -static bool dentry_has_name(const struct dentry *dentry, const char *name, - size_t name_len) -{ - if (dentry->file_name_utf8_len != name_len) - return false; - return memcmp(dentry->file_name_utf8, name, name_len) == 0; -} static u64 __dentry_correct_length_unaligned(u16 file_name_len, u16 short_name_len) @@ -75,11 +64,102 @@ static u64 dentry_correct_length(const struct dentry *dentry) return (dentry_correct_length_unaligned(dentry) + 7) & ~7; } +/* + * Returns true if @dentry has the UTF-8 file name @name that has length + * @name_len. + */ +static bool dentry_has_name(const struct dentry *dentry, const char *name, + size_t name_len) +{ + if (dentry->file_name_utf8_len != name_len) + return false; + return memcmp(dentry->file_name_utf8, name, name_len) == 0; +} + +static inline bool ads_entry_has_name(const struct ads_entry *entry, + const char *name, size_t name_len) +{ + if (entry->stream_name_utf8_len != name_len) + return false; + return memcmp(entry->stream_name_utf8, name, name_len) == 0; +} + +/* Duplicates a UTF-8 name into UTF-8 and UTF-16 strings and returns the strings + * and their lengths in the pointer arguments */ +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 *name_utf16, *name_utf8; + + utf8_len = strlen(name); + + name_utf16 = utf8_to_utf16(name, utf8_len, &utf16_len); + + if (!name_utf16) + return WIMLIB_ERR_NOMEM; + + name_utf8 = MALLOC(utf8_len + 1); + if (!name_utf8) { + FREE(name_utf8); + return WIMLIB_ERR_NOMEM; + } + 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; +} + +/* Changes the name of a dentry to @new_name. Only changes the file_name and + * file_name_utf8 fields; does not change the short_name, short_name_utf8, or + * full_path_utf8 fields. Also recalculates its length. */ +static int change_dentry_name(struct dentry *dentry, const char *new_name) +{ + int ret; + + ret = get_names(&dentry->file_name, &dentry->file_name_utf8, + &dentry->file_name_len, &dentry->file_name_utf8_len, + new_name); + FREE(dentry->short_name); + dentry->short_name_len = 0; + if (ret == 0) + dentry->length = dentry_correct_length(dentry); + return ret; +} + +/* + * Changes the name of an alternate data stream */ +static int change_ads_name(struct ads_entry *entry, const char *new_name) +{ + return get_names(&entry->stream_name, &entry->stream_name_utf8, + &entry->stream_name_len, + &entry->stream_name_utf8_len, + new_name); +} + +/* Returns the total length of a WIM alternate data stream entry on-disk, + * including the stream name, the null terminator, AND the padding after the + * entry to align the next one (or the next dentry) on an 8-byte boundary. */ +static u64 ads_entry_total_length(const struct ads_entry *entry) +{ + u64 len = WIM_ADS_ENTRY_DISK_SIZE; + if (entry->stream_name_len) + len += entry->stream_name_len + 2; + return (len + 7) & ~7; +} + + static u64 __dentry_total_length(const struct dentry *dentry, u64 length) { - const struct inode *inode = dentry->inode; + const struct inode *inode = dentry->d_inode; for (u16 i = 0; i < inode->num_ads; i++) - length += ads_entry_total_length(inode->ads_entries[i]); + length += ads_entry_total_length(&inode->ads_entries[i]); return (length + 7) & ~7; } @@ -91,7 +171,7 @@ u64 dentry_correct_total_length(const struct dentry *dentry) /* Real length of a dentry, including the alternate data stream entries, which * are not included in the dentry->length field... */ -u64 dentry_total_length(const struct dentry *dentry) +static u64 dentry_total_length(const struct dentry *dentry) { return __dentry_total_length(dentry, dentry->length); } @@ -118,87 +198,51 @@ void stbuf_to_inode(const struct stat *stbuf, struct inode *inode) inode->last_access_time = timespec_to_wim_timestamp(&stbuf->st_atim); } - -/* Sets all the timestamp fields of the dentry to the current time. */ -void inode_update_all_timestamps(struct inode *inode) -{ - u64 now = get_wim_timestamp(); - inode->creation_time = now; - inode->last_access_time = now; - inode->last_write_time = now; -} - -/* Returns the alternate data stream entry belonging to @inode that has the - * stream name @stream_name. */ -struct ads_entry *inode_get_ads_entry(struct inode *inode, - const char *stream_name, - u16 *idx_ret) +#ifdef WITH_FUSE +/* Transfers file attributes from a struct inode to a `stat' buffer. + * + * The lookup table entry tells us which stream in the inode we are statting. + * For a named data stream, everything returned is the same as the unnamed data + * stream except possibly the size and block count. */ +int inode_to_stbuf(const struct inode *inode, struct lookup_table_entry *lte, + struct stat *stbuf) { - size_t stream_name_len; - if (!stream_name) - return NULL; - if (inode->num_ads) { - u16 i = 0; - stream_name_len = strlen(stream_name); - do { - if (ads_entry_has_name(inode->ads_entries[i], - stream_name, stream_name_len)) - { - if (idx_ret) - *idx_ret = i; - return inode->ads_entries[i]; - } - } while (++i != inode->num_ads); - } - return NULL; -} + if (inode_is_symlink(inode)) + stbuf->st_mode = S_IFLNK | 0777; + else if (inode_is_directory(inode)) + stbuf->st_mode = S_IFDIR | 0755; + else + stbuf->st_mode = S_IFREG | 0644; + stbuf->st_ino = (ino_t)inode->ino; + stbuf->st_nlink = inode->link_count; + stbuf->st_uid = getuid(); + stbuf->st_gid = getgid(); -static struct ads_entry *new_ads_entry(const char *name) -{ - struct ads_entry *ads_entry = CALLOC(1, sizeof(struct ads_entry)); - if (!ads_entry) - return NULL; - if (name && *name) { - if (change_ads_name(ads_entry, name)) { - FREE(ads_entry); - return NULL; + if (lte) { + if (lte->resource_location == RESOURCE_IN_STAGING_FILE) { + wimlib_assert(lte->staging_file_name); + struct stat native_stat; + if (stat(lte->staging_file_name, &native_stat) != 0) { + DEBUG("Failed to stat `%s': %m", + lte->staging_file_name); + return -errno; + } + stbuf->st_size = native_stat.st_size; + } else { + stbuf->st_size = wim_resource_size(lte); } + } else { + stbuf->st_size = 0; } - return ads_entry; -} - -/* - * Add an alternate stream entry to an inode and return a pointer to it, or NULL - * if memory could not be allocated. - */ -struct ads_entry *inode_add_ads(struct inode *inode, const char *stream_name) -{ - u16 num_ads; - struct ads_entry **ads_entries; - struct ads_entry *new_entry; - - if (inode->num_ads >= 0xfffe) { - ERROR("Too many alternate data streams in one inode!"); - return NULL; - } - num_ads = inode->num_ads + 1; - ads_entries = REALLOC(inode->ads_entries, - num_ads * sizeof(inode->ads_entries[0])); - if (!ads_entries) { - ERROR("Failed to allocate memory for new alternate data stream"); - return NULL; - } - inode->ads_entries = ads_entries; - new_entry = new_ads_entry(stream_name); - if (new_entry) - return NULL; - inode->num_ads = num_ads; - ads_entries[num_ads - 1] = new_entry; - return new_entry; + stbuf->st_atime = wim_timestamp_to_unix(inode->last_access_time); + stbuf->st_mtime = wim_timestamp_to_unix(inode->last_write_time); + stbuf->st_ctime = wim_timestamp_to_unix(inode->creation_time); + stbuf->st_blocks = (stbuf->st_size + 511) / 512; + return 0; } - +#endif /* * Calls a function on all directory entries in a directory tree. It is called @@ -215,7 +259,7 @@ int for_dentry_in_tree(struct dentry *root, if (ret != 0) return ret; - child = root->inode->children; + child = root->d_inode->children; if (!child) return 0; @@ -225,7 +269,7 @@ int for_dentry_in_tree(struct dentry *root, if (ret != 0) return ret; child = child->next; - } while (child != root->inode->children); + } while (child != root->d_inode->children); return 0; } @@ -240,7 +284,7 @@ int for_dentry_in_tree_depth(struct dentry *root, struct dentry *child; struct dentry *next; - child = root->inode->children; + child = root->d_inode->children; if (child) { do { next = child->next; @@ -248,7 +292,7 @@ int for_dentry_in_tree_depth(struct dentry *root, if (ret != 0) return ret; child = next; - } while (child != root->inode->children); + } while (child != root->d_inode->children); } return visitor(root, arg); } @@ -314,7 +358,7 @@ void calculate_subdir_offsets(struct dentry *dentry, u64 *subdir_offset_p) { struct dentry *child; - child = dentry->inode->children; + child = dentry->d_inode->children; dentry->subdir_offset = *subdir_offset_p; if (child) { @@ -323,7 +367,7 @@ void calculate_subdir_offsets(struct dentry *dentry, u64 *subdir_offset_p) do { *subdir_offset_p += dentry_correct_total_length(child); child = child->next; - } while (child != dentry->inode->children); + } while (child != dentry->d_inode->children); /* End-of-directory dentry on disk. */ *subdir_offset_p += 8; @@ -333,7 +377,7 @@ void calculate_subdir_offsets(struct dentry *dentry, u64 *subdir_offset_p) do { calculate_subdir_offsets(child, subdir_offset_p); child = child->next; - } while (child != dentry->inode->children); + } while (child != dentry->d_inode->children); } else { /* On disk, childless directories have a valid subdir_offset * that points to an 8-byte end-of-directory dentry. Regular @@ -345,7 +389,6 @@ void calculate_subdir_offsets(struct dentry *dentry, u64 *subdir_offset_p) } } - /* Returns the child of @dentry that has the file name @name. * Returns NULL if no child has the name. */ struct dentry *get_dentry_child_with_name(const struct dentry *dentry, @@ -354,14 +397,14 @@ struct dentry *get_dentry_child_with_name(const struct dentry *dentry, struct dentry *child; size_t name_len; - child = dentry->inode->children; + child = dentry->d_inode->children; if (child) { name_len = strlen(name); do { if (dentry_has_name(child, name, name_len)) return child; child = child->next; - } while (child != dentry->inode->children); + } while (child != dentry->d_inode->children); } return NULL; } @@ -378,14 +421,14 @@ static struct dentry *get_dentry_relative_path(struct dentry *cur_dir, if (*path == '\0') return cur_dir; - child = cur_dir->inode->children; + child = cur_dir->d_inode->children; if (child) { new_path = path_next_part(path, &base_len); do { if (dentry_has_name(child, path, base_len)) return get_dentry_relative_path(child, new_path); child = child->next; - } while (child != cur_dir->inode->children); + } while (child != cur_dir->d_inode->children); } return NULL; } @@ -407,7 +450,7 @@ struct inode *wim_pathname_to_inode(WIMStruct *w, const char *path) if (!dentry) return NULL; else - return dentry->inode; + return dentry->d_inode; } /* Returns the dentry that corresponds to the parent directory of @path, or NULL @@ -463,7 +506,7 @@ int print_dentry(struct dentry *dentry, void *lookup_table) { const u8 *hash; struct lookup_table_entry *lte; - const struct inode *inode = dentry->inode; + const struct inode *inode = dentry->d_inode; time_t time; char *p; @@ -508,7 +551,7 @@ int print_dentry(struct dentry *dentry, void *lookup_table) puts("\""); printf("Short Name Length = %hu\n", dentry->short_name_len); printf("Full Path (UTF-8) = \"%s\"\n", dentry->full_path_utf8); - lte = inode_stream_lte(dentry->inode, 0, lookup_table); + lte = inode_stream_lte(dentry->d_inode, 0, lookup_table); if (lte) { print_lookup_table_entry(lte); } else { @@ -522,9 +565,9 @@ int print_dentry(struct dentry *dentry, void *lookup_table) } for (u16 i = 0; i < inode->num_ads; i++) { printf("[Alternate Stream Entry %u]\n", i); - printf("Name = \"%s\"\n", inode->ads_entries[i]->stream_name_utf8); + printf("Name = \"%s\"\n", inode->ads_entries[i].stream_name_utf8); printf("Name Length (UTF-16) = %u\n", - inode->ads_entries[i]->stream_name_len); + inode->ads_entries[i].stream_name_len); hash = inode_stream_hash(inode, i + 1); if (hash) { printf("Hash = 0x"); @@ -544,18 +587,21 @@ static void dentry_common_init(struct dentry *dentry) dentry->refcnt = 1; } -struct inode *new_timeless_inode() +static struct inode *new_timeless_inode() { struct inode *inode = CALLOC(1, sizeof(struct inode)); if (!inode) return NULL; inode->security_id = -1; inode->link_count = 1; +#ifdef WITH_FUSE + inode->next_stream_id = 1; +#endif INIT_LIST_HEAD(&inode->dentry_list); return inode; } -struct inode *new_inode() +static struct inode *new_inode() { struct inode *inode = new_timeless_inode(); if (!inode) @@ -597,14 +643,18 @@ err: return NULL; } -struct dentry *new_dentry_with_inode(const char *name) + +static struct dentry *__new_dentry_with_inode(const char *name, bool timeless) { struct dentry *dentry; dentry = new_dentry(name); if (dentry) { - dentry->inode = new_inode(); - if (dentry->inode) { - inode_add_dentry(dentry, dentry->inode); + if (timeless) + dentry->d_inode = new_timeless_inode(); + else + dentry->d_inode = new_inode(); + if (dentry->d_inode) { + inode_add_dentry(dentry, dentry->d_inode); } else { free_dentry(dentry); dentry = NULL; @@ -613,29 +663,42 @@ struct dentry *new_dentry_with_inode(const char *name) return dentry; } -void free_ads_entry(struct ads_entry *entry) +struct dentry *new_dentry_with_timeless_inode(const char *name) { - if (entry) { - FREE(entry->stream_name); - FREE(entry->stream_name_utf8); - FREE(entry); - } + return __new_dentry_with_inode(name, true); } -void inode_free_ads_entries(struct inode *inode) +struct dentry *new_dentry_with_inode(const char *name) { - if (inode->ads_entries) { - for (u16 i = 0; i < inode->num_ads; i++) - free_ads_entry(inode->ads_entries[i]); - FREE(inode->ads_entries); - } + return __new_dentry_with_inode(name, false); } + +static int init_ads_entry(struct ads_entry *ads_entry, const char *name) +{ + int ret = 0; + memset(ads_entry, 0, sizeof(*ads_entry)); + if (name && *name) + ret = change_ads_name(ads_entry, name); + return ret; +} + +static void destroy_ads_entry(struct ads_entry *ads_entry) +{ + FREE(ads_entry->stream_name); + FREE(ads_entry->stream_name_utf8); +} + + /* Frees an inode. */ void free_inode(struct inode *inode) { if (inode) { - inode_free_ads_entries(inode); + if (inode->ads_entries) { + for (u16 i = 0; i < inode->num_ads; i++) + destroy_ads_entry(&inode->ads_entries[i]); + FREE(inode->ads_entries); + } #ifdef WITH_FUSE wimlib_assert(inode->num_opened_fds == 0); FREE(inode->fds); @@ -646,28 +709,26 @@ void free_inode(struct inode *inode) /* Decrements link count on an inode and frees it if the link count reaches 0. * */ -struct inode *put_inode(struct inode *inode) +static void put_inode(struct inode *inode) { - if (inode) { - wimlib_assert(inode->link_count); - if (--inode->link_count == 0) { - #ifdef WITH_FUSE - if (inode->num_opened_fds == 0) - #endif - { - free_inode(inode); - inode = NULL; - } + wimlib_assert(inode); + wimlib_assert(inode->link_count); + if (--inode->link_count == 0) { + #ifdef WITH_FUSE + if (inode->num_opened_fds == 0) + #endif + { + free_inode(inode); + inode = NULL; } } - return inode; } /* Frees a WIM dentry. * * The inode is freed only if its link count is decremented to 0. */ -struct inode *free_dentry(struct dentry *dentry) +void free_dentry(struct dentry *dentry) { wimlib_assert(dentry); struct inode *inode; @@ -676,9 +737,8 @@ struct inode *free_dentry(struct dentry *dentry) FREE(dentry->file_name_utf8); FREE(dentry->short_name); FREE(dentry->full_path_utf8); - inode = put_inode(dentry->inode); + put_inode(dentry->d_inode); FREE(dentry); - return inode; } void put_dentry(struct dentry *dentry) @@ -690,30 +750,6 @@ void put_dentry(struct dentry *dentry) free_dentry(dentry); } -#if 0 -/* Partically clones a dentry. - * - * Beware: - * - memory for file names is not cloned (the pointers are all set to NULL - * and the lengths are set to zero) - * - next, prev, and children pointers and not touched - */ -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; -} -#endif - /* * This function is passed as an argument to for_dentry_in_tree_depth() in order * to free a directory tree. __args is a pointer to a `struct free_dentry_args'. @@ -721,21 +757,20 @@ struct dentry *clone_dentry(struct dentry *old) static int do_free_dentry(struct dentry *dentry, void *__lookup_table) { struct lookup_table *lookup_table = __lookup_table; - struct lookup_table_entry *lte; - struct inode *inode = dentry->inode; unsigned i; if (lookup_table) { + struct lookup_table_entry *lte; + struct inode *inode = dentry->d_inode; wimlib_assert(inode->link_count); for (i = 0; i <= inode->num_ads; i++) { lte = inode_stream_lte(inode, i, lookup_table); - lte_decrement_refcnt(lte, lookup_table); + if (lte) + lte_decrement_refcnt(lte, lookup_table); } } - wimlib_assert(dentry->refcnt != 0); - if (--dentry->refcnt == 0) - free_dentry(dentry); + put_dentry(dentry); return 0; } @@ -771,21 +806,22 @@ void link_dentry(struct dentry *dentry, struct dentry *parent) { wimlib_assert(dentry_is_directory(parent)); dentry->parent = parent; - if (parent->inode->children) { + if (parent->d_inode->children) { /* Not an only child; link to siblings. */ - dentry->next = parent->inode->children; - dentry->prev = parent->inode->children->prev; + dentry->next = parent->d_inode->children; + dentry->prev = parent->d_inode->children->prev; dentry->next->prev = dentry; dentry->prev->next = dentry; } else { /* Only child; link to parent. */ - parent->inode->children = dentry; + parent->d_inode->children = dentry; dentry->next = dentry; dentry->prev = dentry; } } +#ifdef WITH_FUSE /* * Unlink a dentry from the directory tree. * @@ -796,127 +832,249 @@ void unlink_dentry(struct dentry *dentry) if (dentry_is_root(dentry)) return; if (dentry_is_only_child(dentry)) { - dentry->parent->inode->children = NULL; + dentry->parent->d_inode->children = NULL; } else { if (dentry_is_first_sibling(dentry)) - dentry->parent->inode->children = dentry->next; + dentry->parent->d_inode->children = dentry->next; dentry->next->prev = dentry->prev; dentry->prev->next = dentry->next; } } +#endif -/* Duplicates a UTF-8 name into UTF-8 and UTF-16 strings and returns the strings - * and their lengths in the pointer arguments */ -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 *name_utf16, *name_utf8; - - utf8_len = strlen(name); - - name_utf16 = utf8_to_utf16(name, utf8_len, &utf16_len); - - if (!name_utf16) - return WIMLIB_ERR_NOMEM; - - name_utf8 = MALLOC(utf8_len + 1); - if (!name_utf8) { - FREE(name_utf8); - return WIMLIB_ERR_NOMEM; - } - 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; -} - -/* Changes the name of a dentry to @new_name. Only changes the file_name and - * file_name_utf8 fields; does not change the short_name, short_name_utf8, or - * full_path_utf8 fields. Also recalculates its length. */ -int change_dentry_name(struct dentry *dentry, const char *new_name) -{ - int ret; - - ret = get_names(&dentry->file_name, &dentry->file_name_utf8, - &dentry->file_name_len, &dentry->file_name_utf8_len, - new_name); - FREE(dentry->short_name); - dentry->short_name_len = 0; - if (ret == 0) - dentry->length = dentry_correct_length(dentry); - return ret; -} - -/* - * Changes the name of an alternate data stream */ -int change_ads_name(struct ads_entry *entry, const char *new_name) +static inline struct dentry *inode_first_dentry(struct inode *inode) { - return get_names(&entry->stream_name, &entry->stream_name_utf8, - &entry->stream_name_len, - &entry->stream_name_utf8_len, - new_name); + wimlib_assert(inode->dentry_list.next != &inode->dentry_list); + return container_of(inode->dentry_list.next, struct dentry, + inode_dentry_list); } -/* Parameters for calculate_dentry_statistics(). */ -struct image_statistics { - struct lookup_table *lookup_table; - u64 *dir_count; - u64 *file_count; - u64 *total_bytes; - u64 *hard_link_bytes; -}; - -static int calculate_dentry_statistics(struct dentry *dentry, void *arg) +static int verify_inode(struct inode *inode, const WIMStruct *w) { - struct image_statistics *stats; - struct lookup_table_entry *lte; - - stats = arg; + const struct lookup_table *table = w->lookup_table; + const struct wim_security_data *sd = wim_const_security_data(w); + const struct dentry *first_dentry = inode_first_dentry(inode); + int ret = WIMLIB_ERR_INVALID_DENTRY; - if (dentry_is_directory(dentry) && !dentry_is_root(dentry)) - ++*stats->dir_count; - else - ++*stats->file_count; - - for (unsigned i = 0; i <= dentry->inode->num_ads; i++) { - lte = inode_stream_lte(dentry->inode, i, stats->lookup_table); - if (lte) { - *stats->total_bytes += wim_resource_size(lte); - if (++lte->out_refcnt == 1) - *stats->hard_link_bytes += wim_resource_size(lte); - } + /* Check the security ID */ + if (inode->security_id < -1) { + ERROR("Dentry `%s' has an invalid security ID (%d)", + first_dentry->full_path_utf8, inode->security_id); + goto out; } - return 0; + if (inode->security_id >= sd->num_entries) { + ERROR("Dentry `%s' has an invalid security ID (%d) " + "(there are only %u entries in the security table)", + first_dentry->full_path_utf8, inode->security_id, + sd->num_entries); + goto out; + } + + /* Check that lookup table entries for all the resources exist, except + * if the SHA1 message digest is all 0's, which indicates there is + * intentionally no resource there. */ + if (w->hdr.total_parts == 1) { + for (unsigned i = 0; i <= inode->num_ads; i++) { + struct lookup_table_entry *lte; + const u8 *hash; + hash = inode_stream_hash_unresolved(inode, i); + lte = __lookup_resource(table, hash); + if (!lte && !is_zero_hash(hash)) { + ERROR("Could not find lookup table entry for stream " + "%u of dentry `%s'", i, first_dentry->full_path_utf8); + goto out; + } + if (lte && (lte->real_refcnt += inode->link_count) > lte->refcnt) + { + #ifdef ENABLE_ERROR_MESSAGES + WARNING("The following lookup table entry " + "has a reference count of %u, but", + lte->refcnt); + WARNING("We found %zu references to it", + lte->real_refcnt); + WARNING("(One dentry referencing it is at `%s')", + first_dentry->full_path_utf8); + + print_lookup_table_entry(lte); + #endif + /* Guess what! install.wim for Windows 8 + * contains a stream with 2 dentries referencing + * it, but the lookup table entry has reference + * count of 1. So we will need to handle this + * case and not just make it be an error... I'm + * just setting the reference count to the + * number of references we found. + * (Unfortunately, even after doing this, the + * reference count could be too low if it's also + * referenced in other WIM images) */ + + #if 1 + lte->refcnt = lte->real_refcnt; + WARNING("Fixing reference count"); + #else + goto out; + #endif + } + } + } + + /* Make sure there is only one un-named stream. */ + unsigned num_unnamed_streams = 0; + for (unsigned i = 0; i <= inode->num_ads; i++) { + const u8 *hash; + hash = inode_stream_hash_unresolved(inode, i); + if (!inode_stream_name_len(inode, i) && !is_zero_hash(hash)) + num_unnamed_streams++; + } + if (num_unnamed_streams > 1) { + ERROR("Dentry `%s' has multiple (%u) un-named streams", + first_dentry->full_path_utf8, num_unnamed_streams); + goto out; + } + inode->verified = true; + ret = 0; +out: + return ret; } -/* Calculates some statistics about a dentry tree. */ -void calculate_dir_tree_statistics(struct dentry *root, struct lookup_table *table, - u64 *dir_count_ret, u64 *file_count_ret, - u64 *total_bytes_ret, - u64 *hard_link_bytes_ret) +/* Run some miscellaneous verifications on a WIM dentry */ +int verify_dentry(struct dentry *dentry, void *wim) { - struct image_statistics stats; - *dir_count_ret = 0; - *file_count_ret = 0; - *total_bytes_ret = 0; - *hard_link_bytes_ret = 0; - stats.lookup_table = table; - stats.dir_count = dir_count_ret; - stats.file_count = file_count_ret; - stats.total_bytes = total_bytes_ret; - stats.hard_link_bytes = hard_link_bytes_ret; - for_lookup_table_entry(table, zero_out_refcnts, NULL); - for_dentry_in_tree(root, calculate_dentry_statistics, &stats); + const WIMStruct *w = wim; + const struct inode *inode = dentry->d_inode; + int ret = WIMLIB_ERR_INVALID_DENTRY; + + if (!dentry->d_inode->verified) { + ret = verify_inode(dentry->d_inode, w); + if (ret != 0) + goto out; + } + + /* Cannot have a short name but no long name */ + if (dentry->short_name_len && !dentry->file_name_len) { + ERROR("Dentry `%s' has a short name but no long name", + dentry->full_path_utf8); + goto out; + } + + /* Make sure root dentry is unnamed */ + if (dentry_is_root(dentry)) { + if (dentry->file_name_len) { + ERROR("The root dentry is named `%s', but it must " + "be unnamed", dentry->file_name_utf8); + goto out; + } + } + +#if 0 + /* Check timestamps */ + if (inode->last_access_time < inode->creation_time || + inode->last_write_time < inode->creation_time) { + WARNING("Dentry `%s' was created after it was last accessed or " + "written to", dentry->full_path_utf8); + } +#endif + + ret = 0; +out: + return ret; } +#ifdef WITH_FUSE +/* Returns the alternate data stream entry belonging to @inode that has the + * stream name @stream_name. */ +struct ads_entry *inode_get_ads_entry(struct inode *inode, + const char *stream_name, + u16 *idx_ret) +{ + size_t stream_name_len; + if (!stream_name) + return NULL; + if (inode->num_ads) { + u16 i = 0; + stream_name_len = strlen(stream_name); + do { + if (ads_entry_has_name(&inode->ads_entries[i], + stream_name, stream_name_len)) + { + if (idx_ret) + *idx_ret = i; + return &inode->ads_entries[i]; + } + } while (++i != inode->num_ads); + } + return NULL; +} +#endif + +#if defined(WITH_FUSE) || defined(WITH_NTFS_3G) +/* + * Add an alternate stream entry to an inode and return a pointer to it, or NULL + * if memory could not be allocated. + */ +struct ads_entry *inode_add_ads(struct inode *inode, const char *stream_name) +{ + u16 num_ads; + struct ads_entry *ads_entries; + struct ads_entry *new_entry; + + DEBUG("Add alternate data stream \"%s\"", stream_name); + + if (inode->num_ads >= 0xfffe) { + ERROR("Too many alternate data streams in one inode!"); + return NULL; + } + num_ads = inode->num_ads + 1; + ads_entries = REALLOC(inode->ads_entries, + num_ads * sizeof(inode->ads_entries[0])); + if (!ads_entries) { + ERROR("Failed to allocate memory for new alternate data stream"); + return NULL; + } + inode->ads_entries = ads_entries; + + new_entry = &inode->ads_entries[num_ads - 1]; + if (init_ads_entry(new_entry, stream_name) != 0) + return NULL; +#ifdef WITH_FUSE + new_entry->stream_id = inode->next_stream_id++; +#endif + inode->num_ads = num_ads; + return new_entry; +} +#endif + +#ifdef WITH_FUSE +/* Remove an alternate data stream from the inode */ +void inode_remove_ads(struct inode *inode, u16 idx, + struct lookup_table *lookup_table) +{ + struct ads_entry *ads_entry; + struct lookup_table_entry *lte; + + wimlib_assert(idx < inode->num_ads); + wimlib_assert(inode->resolved); + + ads_entry = &inode->ads_entries[idx]; + + DEBUG("Remove alternate data stream \"%s\"", ads_entry->stream_name_utf8); + + lte = ads_entry->lte; + if (lte) + lte_decrement_refcnt(lte, lookup_table); + + destroy_ads_entry(ads_entry); + + memcpy(&inode->ads_entries[idx], + &inode->ads_entries[idx + 1], + (inode->num_ads - idx - 1) * sizeof(inode->ads_entries[0])); + inode->num_ads--; +} +#endif + + + /* * Reads the alternate data stream entries for a dentry. * @@ -961,7 +1119,7 @@ static int read_ads_entries(const u8 *p, struct inode *inode, u64 remaining_size) { u16 num_ads; - struct ads_entry **ads_entries; + struct ads_entry *ads_entries; int ret; num_ads = inode->num_ads; @@ -980,13 +1138,11 @@ static int read_ads_entries(const u8 *p, struct inode *inode, size_t utf8_len; const u8 *p_save = p; - cur_entry = new_ads_entry(NULL); - if (!cur_entry) { - ret = WIMLIB_ERR_NOMEM; - goto out_free_ads_entries; - } + cur_entry = &ads_entries[i]; - ads_entries[i] = cur_entry; + #ifdef WITH_FUSE + ads_entries[i].stream_id = i + 1; + #endif /* Read the base stream entry, excluding the stream name. */ if (remaining_size < WIM_ADS_ENTRY_DISK_SIZE) { @@ -1072,10 +1228,13 @@ static int read_ads_entries(const u8 *p, struct inode *inode, remaining_size -= total_length; } inode->ads_entries = ads_entries; +#ifdef WITH_FUSE + inode->next_stream_id = inode->num_ads + 1; +#endif return 0; out_free_ads_entries: for (u16 i = 0; i < num_ads; i++) - free_ads_entry(ads_entries[i]); + destroy_ads_entry(&ads_entries[i]); FREE(ads_entries); return ret; } @@ -1315,7 +1474,7 @@ int read_dentry(const u8 metadata_resource[], u64 metadata_resource_len, /* We've read all the data for this dentry. Set the names and their * lengths, and we've done. */ - dentry->inode = inode; + dentry->d_inode = inode; dentry->file_name = file_name; dentry->file_name_utf8 = file_name_utf8; dentry->short_name = short_name; @@ -1334,87 +1493,100 @@ out_free_inode: return ret; } -/* Run some miscellaneous verifications on a WIM dentry */ -int verify_dentry(struct dentry *dentry, void *wim) +/* Reads the children of a dentry, and all their children, ..., etc. from the + * metadata resource and into the dentry tree. + * + * @metadata_resource: An array that contains the uncompressed metadata + * resource for the WIM file. + * + * @metadata_resource_len: The length of the uncompressed metadata resource, in + * bytes. + * + * @dentry: A pointer to a `struct dentry' that is the root of the directory + * tree and has already been read from the metadata resource. It + * does not need to be the real root because this procedure is + * called recursively. + * + * @return: Zero on success, nonzero on failure. + */ +int read_dentry_tree(const u8 metadata_resource[], u64 metadata_resource_len, + struct dentry *dentry) { - const WIMStruct *w = wim; - const struct lookup_table *table = w->lookup_table; - const struct wim_security_data *sd = wim_const_security_data(w); - const struct inode *inode = dentry->inode; - int ret = WIMLIB_ERR_INVALID_DENTRY; + u64 cur_offset = dentry->subdir_offset; + struct dentry *prev_child = NULL; + struct dentry *first_child = NULL; + struct dentry *child; + struct dentry cur_child; + int ret; - /* Check the security ID */ - if (inode->security_id < -1) { - ERROR("Dentry `%s' has an invalid security ID (%d)", - dentry->full_path_utf8, inode->security_id); - goto out; - } - if (inode->security_id >= sd->num_entries) { - ERROR("Dentry `%s' has an invalid security ID (%d) " - "(there are only %u entries in the security table)", - dentry->full_path_utf8, inode->security_id, - sd->num_entries); - goto out; - } + /* + * If @dentry has no child dentries, nothing more needs to be done for + * this branch. This is the case for regular files, symbolic links, and + * *possibly* empty directories (although an empty directory may also + * have one child dentry that is the special end-of-directory dentry) + */ + if (cur_offset == 0) + return 0; - /* Check that lookup table entries for all the resources exist, except - * if the SHA1 message digest is all 0's, which indicates there is - * intentionally no resource there. */ - if (w->hdr.total_parts == 1) { - for (unsigned i = 0; i <= inode->num_ads; i++) { - struct lookup_table_entry *lte; - const u8 *hash; - hash = inode_stream_hash_unresolved(inode, i); - lte = __lookup_resource(table, hash); - if (!lte && !is_zero_hash(hash)) { - ERROR("Could not find lookup table entry for stream " - "%u of dentry `%s'", i, dentry->full_path_utf8); - goto out; - } + /* Find and read all the children of @dentry. */ + while (1) { + + /* Read next child of @dentry into @cur_child. */ + ret = read_dentry(metadata_resource, metadata_resource_len, + cur_offset, &cur_child); + if (ret != 0) + break; + + /* Check for end of directory. */ + if (cur_child.length == 0) + break; + + /* Not end of directory. Allocate this child permanently and + * link it to the parent and previous child. */ + child = MALLOC(sizeof(struct dentry)); + if (!child) { + ERROR("Failed to allocate %zu bytes for new dentry", + sizeof(struct dentry)); + ret = WIMLIB_ERR_NOMEM; + break; } - } + memcpy(child, &cur_child, sizeof(struct dentry)); - /* Make sure there is only one un-named stream. */ - unsigned num_unnamed_streams = 0; - for (unsigned i = 0; i <= inode->num_ads; i++) { - const u8 *hash; - hash = inode_stream_hash_unresolved(inode, i); - if (!inode_stream_name_len(inode, i) && !is_zero_hash(hash)) - num_unnamed_streams++; - } - if (num_unnamed_streams > 1) { - ERROR("Dentry `%s' has multiple (%u) un-named streams", - dentry->full_path_utf8, num_unnamed_streams); - goto out; - } + if (prev_child) { + prev_child->next = child; + child->prev = prev_child; + } else { + first_child = child; + } - /* Cannot have a short name but no long name */ - if (dentry->short_name_len && !dentry->file_name_len) { - ERROR("Dentry `%s' has a short name but no long name", - dentry->full_path_utf8); - goto out; - } + child->parent = dentry; + prev_child = child; + inode_add_dentry(child, child->d_inode); - /* Make sure root dentry is unnamed */ - if (dentry_is_root(dentry)) { - if (dentry->file_name_len) { - ERROR("The root dentry is named `%s', but it must " - "be unnamed", dentry->file_name_utf8); - goto out; + /* If there are children of this child, call this procedure + * recursively. */ + if (child->subdir_offset != 0) { + ret = read_dentry_tree(metadata_resource, + metadata_resource_len, child); + if (ret != 0) + break; } - } -#if 0 - /* Check timestamps */ - if (inode->last_access_time < inode->creation_time || - inode->last_write_time < inode->creation_time) { - WARNING("Dentry `%s' was created after it was last accessed or " - "written to", dentry->full_path_utf8); + /* Advance to the offset of the next child. Note: We need to + * advance by the TOTAL length of the dentry, not by the length + * child->length, which although it does take into account the + * padding, it DOES NOT take into account alternate stream + * entries. */ + cur_offset += dentry_total_length(child); } -#endif - ret = 0; -out: + /* Link last child to first one, and set parent's children pointer to + * the first child. */ + if (prev_child) { + prev_child->next = first_child; + first_child->prev = prev_child; + } + dentry->d_inode->children = first_child; return ret; } @@ -1430,7 +1602,7 @@ static u8 *write_dentry(const struct dentry *dentry, u8 *p) { u8 *orig_p = p; const u8 *hash; - const struct inode *inode = dentry->inode; + const struct inode *inode = dentry->d_inode; /* We calculate the correct length of the dentry ourselves because the * dentry->length field may been set to an unexpected value from when we @@ -1475,29 +1647,26 @@ static u8 *write_dentry(const struct dentry *dentry, u8 *p) } /* Align to 8-byte boundary */ - wimlib_assert(length >= (p - orig_p) - && length - (p - orig_p) <= 7); + wimlib_assert(length >= (p - orig_p) && length - (p - orig_p) <= 7); p = put_zeroes(p, length - (p - orig_p)); /* Write the alternate data streams, if there are any. Please see * read_ads_entries() for comments about the format of the on-disk * alternate data stream entries. */ for (u16 i = 0; i < inode->num_ads; i++) { - p = put_u64(p, ads_entry_total_length(inode->ads_entries[i])); + p = put_u64(p, ads_entry_total_length(&inode->ads_entries[i])); p = put_u64(p, 0); /* Unused */ hash = inode_stream_hash(inode, i + 1); p = put_bytes(p, SHA1_HASH_SIZE, hash); - p = put_u16(p, inode->ads_entries[i]->stream_name_len); - if (inode->ads_entries[i]->stream_name_len) { - p = put_bytes(p, inode->ads_entries[i]->stream_name_len, - (u8*)inode->ads_entries[i]->stream_name); + p = put_u16(p, inode->ads_entries[i].stream_name_len); + if (inode->ads_entries[i].stream_name_len) { + p = put_bytes(p, inode->ads_entries[i].stream_name_len, + (u8*)inode->ads_entries[i].stream_name); p = put_u16(p, 0); } p = put_zeroes(p, (8 - (p - orig_p) % 8) % 8); } -#ifdef ENABLE_ASSERTIONS wimlib_assert(p - orig_p == __dentry_total_length(dentry, length)); -#endif return p; } @@ -1517,12 +1686,12 @@ static u8 *write_dentry_tree_recursive(const struct dentry *parent, u8 *p) * recursively writing the directory trees rooted at each of the child * dentries, since the on-disk dentries for a dentry's children are * always located at consecutive positions in the metadata resource! */ - child = parent->inode->children; + child = parent->d_inode->children; if (child) { do { p = write_dentry(child, p); child = child->next; - } while (child != parent->inode->children); + } while (child != parent->d_inode->children); } /* write end of directory entry */ @@ -1533,7 +1702,7 @@ static u8 *write_dentry_tree_recursive(const struct dentry *parent, u8 *p) do { p = write_dentry_tree_recursive(child, p); child = child->next; - } while (child != parent->inode->children); + } while (child != parent->d_inode->children); } return p; } @@ -1561,99 +1730,3 @@ u8 *write_dentry_tree(const struct dentry *root, u8 *p) return write_dentry_tree_recursive(root, p); } -/* Reads the children of a dentry, and all their children, ..., etc. from the - * metadata resource and into the dentry tree. - * - * @metadata_resource: An array that contains the uncompressed metadata - * resource for the WIM file. - * - * @metadata_resource_len: The length of the uncompressed metadata resource, in - * bytes. - * - * @dentry: A pointer to a `struct dentry' that is the root of the directory - * tree and has already been read from the metadata resource. It - * does not need to be the real root because this procedure is - * called recursively. - * - * @return: Zero on success, nonzero on failure. - */ -int read_dentry_tree(const u8 metadata_resource[], u64 metadata_resource_len, - struct dentry *dentry) -{ - u64 cur_offset = dentry->subdir_offset; - struct dentry *prev_child = NULL; - struct dentry *first_child = NULL; - struct dentry *child; - struct dentry cur_child; - int ret; - - /* - * If @dentry has no child dentries, nothing more needs to be done for - * this branch. This is the case for regular files, symbolic links, and - * *possibly* empty directories (although an empty directory may also - * have one child dentry that is the special end-of-directory dentry) - */ - if (cur_offset == 0) - return 0; - - /* Find and read all the children of @dentry. */ - while (1) { - - /* Read next child of @dentry into @cur_child. */ - ret = read_dentry(metadata_resource, metadata_resource_len, - cur_offset, &cur_child); - if (ret != 0) - break; - - /* Check for end of directory. */ - if (cur_child.length == 0) - break; - - /* Not end of directory. Allocate this child permanently and - * link it to the parent and previous child. */ - child = MALLOC(sizeof(struct dentry)); - if (!child) { - ERROR("Failed to allocate %zu bytes for new dentry", - sizeof(struct dentry)); - ret = WIMLIB_ERR_NOMEM; - break; - } - memcpy(child, &cur_child, sizeof(struct dentry)); - - if (prev_child) { - prev_child->next = child; - child->prev = prev_child; - } else { - first_child = child; - } - - child->parent = dentry; - prev_child = child; - list_add(&child->inode_dentry_list, &child->inode->dentry_list); - - /* If there are children of this child, call this procedure - * recursively. */ - if (child->subdir_offset != 0) { - ret = read_dentry_tree(metadata_resource, - metadata_resource_len, child); - if (ret != 0) - break; - } - - /* Advance to the offset of the next child. Note: We need to - * advance by the TOTAL length of the dentry, not by the length - * child->length, which although it does take into account the - * padding, it DOES NOT take into account alternate stream - * entries. */ - cur_offset += dentry_total_length(child); - } - - /* Link last child to first one, and set parent's children pointer to - * the first child. */ - if (prev_child) { - prev_child->next = first_child; - first_child->prev = prev_child; - } - dentry->inode->children = first_child; - return ret; -}