X-Git-Url: https://wimlib.net/git/?p=wimlib;a=blobdiff_plain;f=src%2Fmount.c;h=6efe84c6a375468654f246b3313b055d5782f682;hp=46da9e74cb534a8371d361f34a5f82b27d1deaa7;hb=35fe5c7c2f2e5054abd93a7b755c2c670ee476da;hpb=d125eeb310e7e4d3e4288293acc32997462a39ca diff --git a/src/mount.c b/src/mount.c index 46da9e74..6efe84c6 100644 --- a/src/mount.c +++ b/src/mount.c @@ -13,22 +13,23 @@ * This file is part of wimlib, a library for working with WIM files. * * wimlib 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 - * Software Foundation; either version 2.1 of the License, or (at your option) + * terms of the GNU General Public License as published by the Free + * Software Foundation; either version 3 of the License, or (at your option) * any later version. * * wimlib is distributed in the hope that it will be useful, but WITHOUT ANY * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR - * A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more + * A PARTICULAR PURPOSE. See the GNU General Public License for more * details. * - * You should have received a copy of the GNU Lesser General Public License + * You should have received a copy of the GNU General Public License * along with wimlib; if not, see http://www.gnu.org/licenses/. */ #include "wimlib_internal.h" #ifdef WITH_FUSE + #include "sha1.h" #include "lookup_table.h" #include "xml.h" @@ -44,6 +45,11 @@ #include #include #include +#include + +#ifdef ENABLE_XATTR +#include +#endif struct wimlib_fd { u16 idx; @@ -143,14 +149,17 @@ static int close_wimlib_fd(struct wimlib_fd *fd) wimlib_assert(lte); wimlib_assert(lte->num_opened_fds); - if (lte->staging_file_name) { + if (lte->resource_location == RESOURCE_IN_STAGING_FILE) { + wimlib_assert(lte->staging_file_name); wimlib_assert(fd->staging_fd != -1); if (close(fd->staging_fd) != 0) return -errno; } if (--lte->num_opened_fds == 0 && lte->refcnt == 0) { - if (lte->staging_file_name) + if (lte->resource_location == RESOURCE_IN_STAGING_FILE) { + wimlib_assert(lte->staging_file_name); unlink(lte->staging_file_name); + } free_lookup_table_entry(lte); } wimlib_assert(lte->fds[fd->idx] == fd); @@ -184,6 +193,20 @@ static void remove_dentry(struct dentry *dentry, put_dentry(dentry); } +static void remove_ads(struct dentry *dentry, + struct ads_entry *ads_entry, + struct lookup_table *lookup_table) +{ + struct lookup_table_entry *lte; + + wimlib_assert(dentry->resolved); + + lte = lte_decrement_refcnt(ads_entry->lte, lookup_table); + if (lte) + list_del(&ads_entry->lte_group_list.list); + dentry_remove_ads(dentry, ads_entry); +} + /* Transfers file attributes from a struct dentry to a `stat' buffer. */ int dentry_to_stbuf(const struct dentry *dentry, struct stat *stbuf) { @@ -196,18 +219,24 @@ int dentry_to_stbuf(const struct dentry *dentry, struct stat *stbuf) else stbuf->st_mode = S_IFREG | 0644; - stbuf->st_ino = (ino_t)dentry->hard_link; + stbuf->st_ino = (ino_t)dentry->link_group_id; stbuf->st_nlink = dentry_link_group_size(dentry); stbuf->st_uid = getuid(); stbuf->st_gid = getgid(); /* Use the size of the unnamed (default) file stream. */ - if ((lte = dentry_lte(dentry))) { - if (lte->staging_file_name) { + lte = dentry_unnamed_lte_resolved(dentry); + if (lte) { + if (lte->resource_location == RESOURCE_IN_STAGING_FILE) { + wimlib_assert(mount_flags & WIMLIB_MOUNT_FLAG_READWRITE); + wimlib_assert(lte->staging_file_name); struct stat native_stat; - if (stat(lte->staging_file_name, &native_stat) != 0) + 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 = lte->resource_entry.original_size; @@ -216,9 +245,9 @@ int dentry_to_stbuf(const struct dentry *dentry, struct stat *stbuf) stbuf->st_size = 0; } - 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_atime = wim_timestamp_to_unix(dentry->last_access_time); + stbuf->st_mtime = wim_timestamp_to_unix(dentry->last_write_time); + stbuf->st_ctime = wim_timestamp_to_unix(dentry->creation_time); stbuf->st_blocks = (stbuf->st_size + 511) / 512; return 0; } @@ -239,7 +268,7 @@ static int create_staging_file(char **name_ret, int open_flags) int fd; int errno_save; - name_len = staging_dir_name_len + 1 + WIM_HASH_SIZE; + name_len = staging_dir_name_len + 1 + SHA1_HASH_SIZE; name = MALLOC(name_len + 1); if (!name) { errno = ENOMEM; @@ -251,7 +280,7 @@ static int create_staging_file(char **name_ret, int open_flags) memcpy(name, staging_dir_name, staging_dir_name_len); name[staging_dir_name_len] = '/'; randomize_char_array_with_alnum(name + staging_dir_name_len + 1, - WIM_HASH_SIZE); + SHA1_HASH_SIZE); name[name_len] = '\0'; @@ -287,7 +316,6 @@ static int create_staging_file(char **name_ret, int open_flags) static struct lookup_table_entry * lte_extract_fds(struct lookup_table_entry *old_lte, u64 link_group) { - int ret; u16 num_transferred_fds; struct lookup_table_entry *new_lte; @@ -298,7 +326,7 @@ lte_extract_fds(struct lookup_table_entry *old_lte, u64 link_group) num_transferred_fds = 0; for (u16 i = 0; i < old_lte->num_allocated_fds; i++) if (old_lte->fds[i] && old_lte->fds[i]->dentry && - old_lte->fds[i]->dentry->hard_link == link_group) + old_lte->fds[i]->dentry->link_group_id == link_group) num_transferred_fds++; DEBUG("Transferring %u file descriptors", num_transferred_fds); @@ -309,7 +337,7 @@ lte_extract_fds(struct lookup_table_entry *old_lte, u64 link_group) } for (u16 i = 0, j = 0; ; i++) { if (old_lte->fds[i] && old_lte->fds[i]->dentry && - old_lte->fds[i]->dentry->hard_link == link_group) { + old_lte->fds[i]->dentry->link_group_id == link_group) { struct wimlib_fd *fd = old_lte->fds[i]; old_lte->fds[i] = NULL; fd->lte = new_lte; @@ -361,7 +389,7 @@ static void lte_transfer_stream_entries(struct lookup_table_entry *new_lte, do { struct dentry *d; d = container_of(pos, struct dentry, link_group_list); - wimlib_assert(d->hard_link == dentry->hard_link); + wimlib_assert(d->link_group_id == dentry->link_group_id); lte_transfer_dentry(new_lte, d); pos = pos->next; } while (pos != &dentry->link_group_list); @@ -420,8 +448,7 @@ static int extract_resource_to_staging_dir(struct dentry *dentry, return -errno; if (old_lte) - ret = extract_resource_to_fd(w, &old_lte->resource_entry, fd, - size); + ret = extract_wim_resource_to_fd(old_lte, fd, size); else ret = 0; if (ret != 0 || close(fd) != 0) { @@ -444,7 +471,7 @@ static int extract_resource_to_staging_dir(struct dentry *dentry, new_lte = old_lte; } else { DEBUG("Splitting lookup table entry " - "(link_group_size = %u, lte refcnt = %u)", + "(link_group_size = %zu, lte refcnt = %u)", link_group_size, old_lte->refcnt); /* Split a hard link group away from the "lookup table * entry" hard link group (i.e. we had two hard link @@ -461,7 +488,7 @@ static int extract_resource_to_staging_dir(struct dentry *dentry, * XXX*/ wimlib_assert(old_lte->refcnt > link_group_size); - new_lte = lte_extract_fds(old_lte, dentry->hard_link); + new_lte = lte_extract_fds(old_lte, dentry->link_group_id); if (!new_lte) { ret = -ENOMEM; goto out_delete_staging_file; @@ -482,8 +509,11 @@ static int extract_resource_to_staging_dir(struct dentry *dentry, } new_lte->resource_entry.original_size = size; new_lte->refcnt = link_group_size; - randomize_byte_array(new_lte->hash, WIM_HASH_SIZE); + random_hash(new_lte->hash); + if (new_lte->staging_file_name) + FREE(new_lte->staging_file_name); new_lte->staging_file_name = staging_file_name; + new_lte->resource_location = RESOURCE_IN_STAGING_FILE; lookup_table_insert(w->lookup_table, new_lte); list_add(&new_lte->staging_list, &staging_list); @@ -564,8 +594,8 @@ static inline int delete_staging_dir() * commands */ static char *unmount_to_daemon_mq_name; static char *daemon_to_unmount_mq_name; -static int unmount_to_daemon_mq; -static int daemon_to_unmount_mq; +static mqd_t unmount_to_daemon_mq; +static mqd_t daemon_to_unmount_mq; /* Simple function that returns the concatenation of 4 strings. */ static char *strcat_dup(const char *s1, const char *s2, const char *s3, @@ -653,7 +683,7 @@ static int open_message_queues(bool daemon) unmount_to_daemon_mq = mq_open(unmount_to_daemon_mq_name, flags, 0700, NULL); - if (unmount_to_daemon_mq == -1) { + if (unmount_to_daemon_mq == (mqd_t)-1) { ERROR_WITH_ERRNO("mq_open()"); ret = WIMLIB_ERR_MQUEUE; goto err2; @@ -667,7 +697,7 @@ static int open_message_queues(bool daemon) daemon_to_unmount_mq = mq_open(daemon_to_unmount_mq_name, flags, 0700, NULL); - if (daemon_to_unmount_mq == -1) { + if (daemon_to_unmount_mq == (mqd_t)-1) { ERROR_WITH_ERRNO("mq_open()"); ret = WIMLIB_ERR_MQUEUE; goto err3; @@ -733,6 +763,8 @@ static int close_lte_fds(struct lookup_table_entry *lte) { for (u16 i = 0, j = 0; j < lte->num_opened_fds; i++) { if (lte->fds[i] && lte->fds[i]->staging_fd != -1) { + wimlib_assert(lte->resource_location == RESOURCE_IN_STAGING_FILE); + wimlib_assert(lte->staging_file_name); if (close(lte->fds[i]->staging_fd) != 0) { ERROR_WITH_ERRNO("Failed close file `%s'", lte->staging_file_name); @@ -768,19 +800,22 @@ static void lte_list_change_lte_ptr(struct lookup_table_entry *lte, } -static int calculate_sha1sum_of_staging_file(struct lookup_table_entry *lte, - struct lookup_table *table) +static int update_lte_of_staging_file(struct lookup_table_entry *lte, + struct lookup_table *table) { struct lookup_table_entry *duplicate_lte; int ret; - u8 hash[WIM_HASH_SIZE]; + u8 hash[SHA1_HASH_SIZE]; + struct stat stbuf; + + wimlib_assert(lte->resource_location == RESOURCE_IN_STAGING_FILE); + wimlib_assert(lte->staging_file_name); ret = sha1sum(lte->staging_file_name, hash); if (ret != 0) return ret; lookup_table_unlink(table, lte); - memcpy(lte->hash, hash, WIM_HASH_SIZE); duplicate_lte = __lookup_resource(table, hash); @@ -789,11 +824,20 @@ static int calculate_sha1sum_of_staging_file(struct lookup_table_entry *lte, lte_list_change_lte_ptr(lte, duplicate_lte); duplicate_lte->refcnt += lte->refcnt; - list_splice(&duplicate_lte->lte_group_list, - <e->lte_group_list); + list_splice(<e->lte_group_list, + &duplicate_lte->lte_group_list); free_lookup_table_entry(lte); } else { + if (stat(lte->staging_file_name, &stbuf) != 0) { + ERROR_WITH_ERRNO("Failed to stat `%s'", lte->staging_file_name); + return WIMLIB_ERR_STAT; + } + wimlib_assert(<e->file_on_disk == <e->staging_file_name); + lte->resource_location = RESOURCE_IN_FILE_ON_DISK; + copy_hash(lte->hash, hash); + lte->resource_entry.original_size = stbuf.st_size; + lte->resource_entry.size = stbuf.st_size; lookup_table_insert(table, lte); } @@ -818,12 +862,10 @@ static int rebuild_wim(WIMStruct *w, bool check_integrity) * lookup table entries. */ DEBUG("Calculating SHA1 checksums for all new staging files."); list_for_each_entry_safe(lte, tmp, &staging_list, staging_list) { - ret = calculate_sha1sum_of_staging_file(lte, w->lookup_table); + ret = update_lte_of_staging_file(lte, w->lookup_table); if (ret != 0) return ret; } - if (ret != 0) - return ret; xml_update_image_info(w, w->current_image); @@ -913,10 +955,11 @@ done: close_message_queues(); } +#if 0 static int wimfs_fallocate(const char *path, int mode, off_t offset, off_t len, struct fuse_file_info *fi) { - struct wimlib_fd *fd = (struct wimlib_fd*)fi->fh; + struct wimlib_fd *fd = (struct wimlib_fd*)(uintptr_t)fi->fh; wimlib_assert(fd->staging_fd != -1); return fallocate(fd->staging_fd, mode, offset, len); } @@ -924,14 +967,15 @@ static int wimfs_fallocate(const char *path, int mode, static int wimfs_fgetattr(const char *path, struct stat *stbuf, struct fuse_file_info *fi) { - struct wimlib_fd *fd = (struct wimlib_fd*)fi->fh; + struct wimlib_fd *fd = (struct wimlib_fd*)(uintptr_t)fi->fh; return dentry_to_stbuf(fd->dentry, stbuf); } +#endif static int wimfs_ftruncate(const char *path, off_t size, struct fuse_file_info *fi) { - struct wimlib_fd *fd = (struct wimlib_fd*)fi->fh; + struct wimlib_fd *fd = (struct wimlib_fd*)(uintptr_t)fi->fh; int ret = ftruncate(fd->staging_fd, size); if (ret != 0) return ret; @@ -944,18 +988,55 @@ static int wimfs_ftruncate(const char *path, off_t size, */ static int wimfs_getattr(const char *path, struct stat *stbuf) { - struct dentry *dentry = get_dentry(w, path); - if (!dentry) - return -ENOENT; + struct dentry *dentry; + int ret; + + ret = lookup_resource(w, path, + get_lookup_flags() | LOOKUP_FLAG_DIRECTORY_OK, + &dentry, NULL, NULL); + if (ret != 0) + return ret; return dentry_to_stbuf(dentry, stbuf); } +#ifdef ENABLE_XATTR +/* Read an alternate data stream through the XATTR interface, or get its size */ static int wimfs_getxattr(const char *path, const char *name, char *value, size_t size) { - /* XXX */ - return -ENOTSUP; + int ret; + struct dentry *dentry; + struct ads_entry *ads_entry; + size_t res_size; + struct lookup_table_entry *lte; + + if (!(mount_flags & WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_XATTR)) + return -ENOTSUP; + + if (strlen(name) < 5 || memcmp(name, "user.", 5) != 0) + return -ENOATTR; + name += 5; + + dentry = get_dentry(w, path); + if (!dentry) + return -ENOENT; + ads_entry = dentry_get_ads_entry(dentry, name); + if (!ads_entry) + return -ENOATTR; + + lte = ads_entry->lte; + res_size = wim_resource_size(lte); + + if (size == 0) + return res_size; + if (res_size > size) + return -ERANGE; + ret = read_full_wim_resource(lte, (u8*)value); + if (ret != 0) + return -EIO; + return res_size; } +#endif /* Create a hard link */ static int wimfs_link(const char *to, const char *from) @@ -1009,11 +1090,40 @@ static int wimfs_link(const char *to, const char *from) return 0; } +#ifdef ENABLE_XATTR static int wimfs_listxattr(const char *path, char *list, size_t size) { - /* XXX */ - return -ENOTSUP; + struct dentry *dentry; + int ret; + char *p = list; + size_t needed_size; + unsigned i; + if (!(mount_flags & WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_XATTR)) + return -ENOTSUP; + + /* List alternate data streams, or get the list size */ + + ret = lookup_resource(w, path, get_lookup_flags(), &dentry, NULL, NULL); + if (ret != 0) + return ret; + if (size == 0) { + needed_size = 0; + for (i = 0; i < dentry->num_ads; i++) + needed_size += dentry->ads_entries[i].stream_name_utf8_len + 6; + return needed_size; + } else { + for (i = 0; i < dentry->num_ads; i++) { + needed_size = dentry->ads_entries[i].stream_name_utf8_len + 6; + if (needed_size > size) + return -ERANGE; + p += sprintf(p, "user.%s", + dentry->ads_entries[i].stream_name_utf8) + 1; + size -= needed_size; + } + return p - list; + } } +#endif /* * Create a directory in the WIM. @@ -1039,7 +1149,7 @@ static int wimfs_mkdir(const char *path, mode_t mode) newdir = new_dentry(basename); newdir->attributes |= FILE_ATTRIBUTE_DIRECTORY; newdir->resolved = true; - newdir->hard_link = next_link_group_id++; + newdir->link_group_id = next_link_group_id++; link_dentry(newdir, parent); return 0; } @@ -1055,6 +1165,10 @@ static int wimfs_mknod(const char *path, mode_t mode, dev_t rdev) struct ads_entry *new_entry; struct dentry *dentry; + char *p = (char*)stream_name - 1; + wimlib_assert(*p == ':'); + *p = '\0'; + dentry = get_dentry(w, path); if (!dentry || !dentry_is_regular_file(dentry)) return -ENOENT; @@ -1085,7 +1199,7 @@ static int wimfs_mknod(const char *path, mode_t mode, dev_t rdev) if (!dentry) return -ENOMEM; dentry->resolved = true; - dentry->hard_link = next_link_group_id++; + dentry->link_group_id = next_link_group_id++; dentry->lte_group_list.type = STREAM_TYPE_NORMAL; INIT_LIST_HEAD(&dentry->lte_group_list.list); link_dentry(dentry, parent); @@ -1099,7 +1213,6 @@ static int wimfs_open(const char *path, struct fuse_file_info *fi) { struct dentry *dentry; struct lookup_table_entry *lte; - u8 *dentry_hash; int ret; struct wimlib_fd *fd; unsigned stream_idx; @@ -1139,20 +1252,21 @@ static int wimfs_open(const char *path, struct fuse_file_info *fi) * directly from the WIM file if we are opening it read-only, * but we need to extract the resource to the staging directory * if we are opening it writable. */ - if (flags_writable(fi->flags) && !lte->staging_file_name) { + if (flags_writable(fi->flags) && + lte->resource_location != RESOURCE_IN_STAGING_FILE) { ret = extract_resource_to_staging_dir(dentry, stream_idx, <e, lte->resource_entry.original_size); if (ret != 0) return ret; } - if (lte->staging_file_name) { + if (lte->resource_location == RESOURCE_IN_STAGING_FILE) { fd->staging_fd = open(lte->staging_file_name, fi->flags); if (fd->staging_fd == -1) { close_wimlib_fd(fd); return -errno; } } - fi->fh = (uint64_t)fd; + fi->fh = (uintptr_t)fd; return 0; } @@ -1167,7 +1281,7 @@ static int wimfs_opendir(const char *path, struct fuse_file_info *fi) if (!dentry_is_directory(dentry)) return -ENOTDIR; dentry->num_times_opened++; - fi->fh = (uint64_t)dentry; + fi->fh = (uintptr_t)dentry; return 0; } @@ -1178,7 +1292,7 @@ static int wimfs_opendir(const char *path, struct fuse_file_info *fi) static int wimfs_read(const char *path, char *buf, size_t size, off_t offset, struct fuse_file_info *fi) { - struct wimlib_fd *fd = (struct wimlib_fd*)fi->fh; + struct wimlib_fd *fd = (struct wimlib_fd*)(uintptr_t)fi->fh; if (!fd) { /* Empty file with no lookup table entry on read-only mounted @@ -1189,9 +1303,10 @@ static int wimfs_read(const char *path, char *buf, size_t size, wimlib_assert(fd->lte); - if (fd->lte->staging_file_name) { + if (fd->lte->resource_location == RESOURCE_IN_STAGING_FILE) { /* Read from staging file */ + wimlib_assert(fd->lte->staging_file_name); wimlib_assert(fd->staging_fd != -1); ssize_t ret; @@ -1206,22 +1321,17 @@ static int wimfs_read(const char *path, char *buf, size_t size, } else { /* Read from WIM */ - struct resource_entry *res_entry; - int ctype; + const struct resource_entry *res_entry; res_entry = &fd->lte->resource_entry; - ctype = wim_resource_compression_type(w, res_entry); - if (offset > res_entry->original_size) return -EOVERFLOW; size = min(size, res_entry->original_size - offset); - if (read_resource(w->fp, res_entry->size, - res_entry->original_size, - res_entry->offset, ctype, size, - offset, buf) != 0) + if (read_wim_resource(fd->lte, (u8*)buf, + size, offset, false) != 0) return -EIO; return size; } @@ -1234,7 +1344,7 @@ static int wimfs_readdir(const char *path, void *buf, fuse_fill_dir_t filler, { struct dentry *parent, *child; - parent = (struct dentry*)fi->fh; + parent = (struct dentry*)(uintptr_t)fi->fh; wimlib_assert(parent); child = parent->children; @@ -1268,11 +1378,35 @@ static int wimfs_readlink(const char *path, char *buf, size_t buf_len) return ret; } +/* Creation time, write time, access time */ +static void +dentry_link_group_set_times(struct dentry *dentry, u64 times[3]) +{ + struct dentry *cur = dentry; + do { + if (times[0]) + cur->creation_time = times[0]; + if (times[1]) + cur->last_write_time = times[1]; + if (times[2]) + cur->last_access_time = times[2]; + } while ((cur = container_of(dentry->link_group_list.next, + struct dentry, + link_group_list)) != dentry); +} + +static void +dentry_link_group_update_times(struct dentry *dentry) +{ + u64 now = get_wim_timestamp(); + u64 times[3] = {now, now, now}; + dentry_link_group_set_times(dentry, times); +} + /* Close a file. */ static int wimfs_release(const char *path, struct fuse_file_info *fi) { - int ret; - struct wimlib_fd *fd = (struct wimlib_fd*)fi->fh; + struct wimlib_fd *fd = (struct wimlib_fd*)(uintptr_t)fi->fh; if (!fd) { /* Empty file with no lookup table entry on read-only mounted @@ -1281,18 +1415,12 @@ static int wimfs_release(const char *path, struct fuse_file_info *fi) return 0; } - if (flags_writable(fi->flags) && fd->dentry) { - u64 now = get_timestamp(); - fd->dentry->last_access_time = now; - fd->dentry->last_write_time = now; - } - return close_wimlib_fd(fd); } static int wimfs_releasedir(const char *path, struct fuse_file_info *fi) { - struct dentry *dentry = (struct dentry *)fi->fh; + struct dentry *dentry = (struct dentry *)(uintptr_t)fi->fh; wimlib_assert(dentry); wimlib_assert(dentry->num_times_opened); @@ -1301,11 +1429,30 @@ static int wimfs_releasedir(const char *path, struct fuse_file_info *fi) return 0; } +#ifdef ENABLE_XATTR +/* Remove an alternate data stream through the XATTR interface */ static int wimfs_removexattr(const char *path, const char *name) { - /* XXX */ - return -ENOTSUP; + struct dentry *dentry; + struct ads_entry *ads_entry; + if (!(mount_flags & WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_XATTR)) + return -ENOTSUP; + + if (strlen(name) < 5 || memcmp(name, "user.", 5) != 0) + return -ENOATTR; + name += 5; + + dentry = get_dentry(w, path); + if (!dentry) + return -ENOENT; + + ads_entry = dentry_get_ads_entry(dentry, name); + if (!ads_entry) + return -ENOATTR; + remove_ads(dentry, ads_entry, w->lookup_table); + return 0; } +#endif /* Renames a file or directory. See rename (3) */ static int wimfs_rename(const char *from, const char *to) @@ -1393,12 +1540,71 @@ static int wimfs_rmdir(const char *path) return 0; } +#ifdef ENABLE_XATTR +/* Write an alternate data stream through the XATTR interface */ static int wimfs_setxattr(const char *path, const char *name, const char *value, size_t size, int flags) { - /* XXX */ - return -ENOTSUP; + struct dentry *dentry; + struct ads_entry *existing_ads_entry; + struct ads_entry *new_ads_entry; + struct lookup_table_entry *existing_lte; + struct lookup_table_entry *lte; + u8 value_hash[SHA1_HASH_SIZE]; + + if (!(mount_flags & WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_XATTR)) + return -ENOTSUP; + + if (strlen(name) < 5 || memcmp(name, "user.", 5) != 0) + return -ENOATTR; + name += 5; + + dentry = get_dentry(w, path); + if (!dentry) + return -ENOENT; + existing_ads_entry = dentry_get_ads_entry(dentry, name); + if (existing_ads_entry) { + if (flags & XATTR_CREATE) + return -EEXIST; + remove_ads(dentry, existing_ads_entry, w->lookup_table); + } else { + if (flags & XATTR_REPLACE) + return -ENOATTR; + } + new_ads_entry = dentry_add_ads(dentry, name); + if (!new_ads_entry) + return -ENOMEM; + + sha1_buffer((const u8*)value, size, value_hash); + + existing_lte = __lookup_resource(w->lookup_table, value_hash); + + if (existing_lte) { + lte = existing_lte; + lte->refcnt++; + } else { + u8 *value_copy; + lte = new_lookup_table_entry(); + if (!lte) + return -ENOMEM; + value_copy = MALLOC(size); + if (!value_copy) { + FREE(lte); + return -ENOMEM; + } + memcpy(value_copy, value, size); + lte->resource_location = RESOURCE_IN_ATTACHED_BUFFER; + lte->attached_buffer = value_copy; + lte->resource_entry.original_size = size; + lte->resource_entry.size = size; + lte->resource_entry.flags = 0; + copy_hash(lte->hash, value_hash); + lookup_table_insert(w->lookup_table, lte); + } + new_ads_entry->lte = lte; + return 0; } +#endif static int wimfs_symlink(const char *to, const char *from) { @@ -1422,15 +1628,17 @@ static int wimfs_symlink(const char *to, const char *from) dentry->attributes = FILE_ATTRIBUTE_REPARSE_POINT; dentry->reparse_tag = WIM_IO_REPARSE_TAG_SYMLINK; + dentry->link_group_id = next_link_group_id++; if (dentry_set_symlink(dentry, to, w->lookup_table, <e) != 0) goto out_free_dentry; + wimlib_assert(lte); + dentry->ads_entries[1].lte_group_list.type = STREAM_TYPE_ADS; list_add(&dentry->ads_entries[1].lte_group_list.list, <e->lte_group_list); - dentry->ads_entries[1].lte = lte; - dentry->resolved = true; + wimlib_assert(dentry->resolved); link_dentry(dentry, dentry_parent); return 0; @@ -1468,7 +1676,7 @@ static int wimfs_truncate(const char *path, off_t size) ret = extract_resource_to_staging_dir(dentry, stream_idx, <e, size); } - dentry_update_all_timestamps(dentry); + dentry_link_group_update_times(dentry); return ret; } @@ -1478,7 +1686,6 @@ static int wimfs_unlink(const char *path) struct dentry *dentry; struct lookup_table_entry *lte; int ret; - u8 *dentry_hash; unsigned stream_idx; ret = lookup_resource(w, path, get_lookup_flags(), &dentry, @@ -1493,13 +1700,8 @@ static int wimfs_unlink(const char *path) remove_dentry(dentry, w->lookup_table); } else { /* We are removing an alternate data stream. */ - struct ads_entry *ads_entry; - - ads_entry = &dentry->ads_entries[stream_idx - 1]; - lte = lte_decrement_refcnt(lte, w->lookup_table); - if (lte) - list_del(&ads_entry->lte_group_list.list); - dentry_remove_ads(dentry, ads_entry); + remove_ads(dentry, &dentry->ads_entries[stream_idx - 1], + w->lookup_table); } /* Beware: The lookup table entry(s) may still be referenced by users * that have opened the corresponding streams. They are freed later in @@ -1507,22 +1709,47 @@ static int wimfs_unlink(const char *path) return 0; } -/* Change the timestamp on a file dentry. +#ifdef HAVE_UTIMENSAT +/* + * Change the timestamp on a file dentry. * - * There is no distinction between a file and its alternate data streams here. */ + * Note that alternate data streams do not have their own timestamps. + */ static int wimfs_utimens(const char *path, const struct timespec tv[2]) { struct dentry *dentry = get_dentry(w, path); if (!dentry) return -ENOENT; - time_t last_access_t = (tv[0].tv_nsec == UTIME_NOW) ? - time(NULL) : tv[0].tv_sec; - dentry->last_access_time = unix_timestamp_to_ms(last_access_t); - time_t last_mod_t = (tv[1].tv_nsec == UTIME_NOW) ? - time(NULL) : tv[1].tv_sec; - dentry->last_write_time = unix_timestamp_to_ms(last_mod_t); + u64 times[3] = {0, 0, 0}; + if (tv[0].tv_nsec != UTIME_OMIT) { + if (tv[0].tv_nsec == UTIME_NOW) + times[2] = get_wim_timestamp(); + else + times[2] = timespec_to_wim_timestamp(&tv[0]); + } + if (tv[1].tv_nsec != UTIME_OMIT) { + if (tv[1].tv_nsec == UTIME_NOW) + times[1] = get_wim_timestamp(); + else + times[1] = timespec_to_wim_timestamp(&tv[1]); + } + dentry_link_group_set_times(dentry, times); + return 0; +} +#else +static int wimfs_utime(const char *path, struct utimbuf *times) +{ + struct dentry *dentry = get_dentry(w, path); + if (!dentry) + return -ENOENT; + u64 wim_times[3]; + wim_times[0] = 0; + wim_times[1] = unix_timestamp_to_wim(times->modtime); + wim_times[2] = unix_timestamp_to_wim(times->actime); + dentry_link_group_set_times(dentry, wim_times); return 0; } +#endif /* Writes to a file in the WIM filesystem. * It may be an alternate data stream, but here we don't even notice because we @@ -1530,7 +1757,7 @@ static int wimfs_utimens(const char *path, const struct timespec tv[2]) static int wimfs_write(const char *path, const char *buf, size_t size, off_t offset, struct fuse_file_info *fi) { - struct wimlib_fd *fd = (struct wimlib_fd*)fi->fh; + struct wimlib_fd *fd = (struct wimlib_fd*)(uintptr_t)fi->fh; int ret; wimlib_assert(fd); @@ -1547,19 +1774,31 @@ static int wimfs_write(const char *path, const char *buf, size_t size, if (ret == -1) return -errno; + if (fd->dentry) { + u64 now = get_wim_timestamp(); + u64 times[3] = {0, now, now}; + dentry_link_group_set_times(fd->dentry, times); + } + return ret; } static struct fuse_operations wimfs_operations = { .access = wimfs_access, .destroy = wimfs_destroy, +#if 0 .fallocate = wimfs_fallocate, .fgetattr = wimfs_fgetattr, +#endif .ftruncate = wimfs_ftruncate, .getattr = wimfs_getattr, +#ifdef ENABLE_XATTR .getxattr = wimfs_getxattr, +#endif .link = wimfs_link, +#ifdef ENABLE_XATTR .listxattr = wimfs_listxattr, +#endif .mkdir = wimfs_mkdir, .mknod = wimfs_mknod, .open = wimfs_open, @@ -1569,46 +1808,117 @@ static struct fuse_operations wimfs_operations = { .readlink = wimfs_readlink, .release = wimfs_release, .releasedir = wimfs_releasedir, +#ifdef ENABLE_XATTR .removexattr = wimfs_removexattr, +#endif .rename = wimfs_rename, .rmdir = wimfs_rmdir, +#ifdef ENABLE_XATTR .setxattr = wimfs_setxattr, +#endif .symlink = wimfs_symlink, .truncate = wimfs_truncate, .unlink = wimfs_unlink, +#ifdef HAVE_UTIMENSAT .utimens = wimfs_utimens, +#else + .utime = wimfs_utime, +#endif .write = wimfs_write, }; +static int check_lte_refcnt(struct lookup_table_entry *lte, void *ignore) +{ + size_t lte_group_size = 0; + struct list_head *cur; + list_for_each(cur, <e->lte_group_list) + lte_group_size++; + if (lte_group_size > lte->refcnt) { +#ifdef ENABLE_ERROR_MESSAGES + struct dentry *example_dentry; + struct list_head *next; + struct stream_list_head *head; + WARNING("The following lookup table entry has a reference count " + "of %u, but", lte->refcnt); + WARNING("We found %zu references to it", lte_group_size); + next = lte->lte_group_list.next; + head = container_of(next, struct stream_list_head, list); + if (head->type == STREAM_TYPE_NORMAL) { + example_dentry = container_of(head, struct dentry, + lte_group_list); + WARNING("(One dentry referencing it is at `%s')", + example_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. */ + + #if 1 + lte->refcnt = lte_group_size; + WARNING("Fixing reference count"); + #else + return WIMLIB_ERR_INVALID_DENTRY; + #endif + } + return 0; +} + /* Mounts a WIM file. */ WIMLIBAPI int wimlib_mount(WIMStruct *wim, int image, const char *dir, - int flags) + int flags, WIMStruct **additional_swms, + unsigned num_additional_swms) { int argc = 0; char *argv[16]; int ret; char *p; + struct lookup_table *joined_tab, *wim_tab_save; DEBUG("Mount: wim = %p, image = %d, dir = %s, flags = %d, ", wim, image, dir, flags); - if (!dir) + if (!wim || !dir) return WIMLIB_ERR_INVALID_PARAM; + ret = verify_swm_set(wim, additional_swms, num_additional_swms); + if (ret != 0) + return ret; + + if (num_additional_swms) { + ret = new_joined_lookup_table(wim, additional_swms, + num_additional_swms, + &joined_tab); + if (ret != 0) + return ret; + wim_tab_save = wim->lookup_table; + wim->lookup_table = joined_tab; + } + ret = wimlib_select_image(wim, image); if (ret != 0) - return ret; + goto out; DEBUG("Selected image %d", image); - next_link_group_id = assign_link_groups(wim->image_metadata[image - 1].lgt); + next_link_group_id = assign_link_group_ids(wim->image_metadata[image - 1].lgt); + DEBUG("Resolving lookup table entries"); /* Resolve all the lookup table entries of the dentry tree */ for_dentry_in_tree(wim_root_dentry(wim), dentry_resolve_ltes, wim->lookup_table); + DEBUG("Checking lookup table entry reference counts"); + + ret = for_lookup_table_entry(wim->lookup_table, check_lte_refcnt, NULL); + if (ret != 0) + goto out; + if (flags & WIMLIB_MOUNT_FLAG_READWRITE) wim_get_current_image_metadata(wim)->modified = true; @@ -1617,18 +1927,35 @@ WIMLIBAPI int wimlib_mount(WIMStruct *wim, int image, const char *dir, WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_WINDOWS))) flags |= WIMLIB_MOUNT_FLAG_STREAM_INTERFACE_XATTR; + DEBUG("Getting current directory"); + mount_dir = dir; working_directory = getcwd(NULL, 0); if (!working_directory) { ERROR_WITH_ERRNO("Could not determine current directory"); - return WIMLIB_ERR_NOTDIR; + ret = WIMLIB_ERR_NOTDIR; + goto out; } + DEBUG("Closing POSIX message queues"); + /* XXX hack to get rid of the message queues if they already exist for + * some reason (maybe left over from a previous mount that wasn't + * unmounted correctly) */ + ret = open_message_queues(true); + if (ret != 0) + goto out; + close_message_queues(); + + DEBUG("Preparing arguments to fuse_main()"); + + p = STRDUP(dir); - if (!p) - return WIMLIB_ERR_NOMEM; + if (!p) { + ret = WIMLIB_ERR_NOMEM; + goto out; + } - argv[argc++] = "mount"; + argv[argc++] = "imagex"; argv[argc++] = p; argv[argc++] = "-s"; /* disable multi-threaded operation */ @@ -1650,12 +1977,14 @@ WIMLIBAPI int wimlib_mount(WIMStruct *wim, int image, const char *dir, make_staging_dir(); if (!staging_dir_name) { FREE(p); - return WIMLIB_ERR_MKDIR; + ret = WIMLIB_ERR_MKDIR; + goto out; } } else { /* Read-only mount */ strcat(optstring, ",ro"); } + strcat(optstring, ",subtype=wimfs,attr_timeout=0"); argv[argc] = NULL; #ifdef ENABLE_DEBUG @@ -1676,8 +2005,14 @@ WIMLIBAPI int wimlib_mount(WIMStruct *wim, int image, const char *dir, mount_flags = flags; ret = fuse_main(argc, argv, &wimfs_operations, NULL); - - return (ret == 0) ? 0 : WIMLIB_ERR_FUSE; + if (ret) + ret = WIMLIB_ERR_FUSE; +out: + if (num_additional_swms) { + free_lookup_table(wim->lookup_table); + wim->lookup_table = wim_tab_save; + } + return ret; } @@ -1696,6 +2031,30 @@ WIMLIBAPI int wimlib_unmount(const char *dir, int flags) int msgsize; int errno_save; + mount_dir = dir; + + /* Open message queues between the unmount process and the + * filesystem daemon. */ + ret = open_message_queues(false); + if (ret != 0) + return ret; + + /* Send a message to the filesystem saying whether to commit or + * not. */ + msg[0] = (flags & WIMLIB_UNMOUNT_FLAG_COMMIT) ? 1 : 0; + msg[1] = (flags & WIMLIB_UNMOUNT_FLAG_CHECK_INTEGRITY) ? 1 : 0; + + DEBUG("Sending message: %s, %s", + (msg[0] == 0) ? "don't commit" : "commit", + (msg[1] == 0) ? "don't check" : "check"); + ret = mq_send(unmount_to_daemon_mq, msg, 2, 1); + if (ret == -1) { + ERROR("Failed to notify filesystem daemon whether we want to " + "commit changes or not"); + close_message_queues(); + return WIMLIB_ERR_MQUEUE; + } + /* Execute `fusermount -u', which is installed setuid root, to unmount * the WIM. * @@ -1708,7 +2067,7 @@ WIMLIBAPI int wimlib_unmount(const char *dir, int flags) * the WIM file. */ - mount_dir = dir; + pid = fork(); if (pid == -1) { ERROR_WITH_ERRNO("Failed to fork()"); @@ -1717,10 +2076,10 @@ WIMLIBAPI int wimlib_unmount(const char *dir, int flags) if (pid == 0) { execlp("fusermount", "fusermount", "-u", dir, NULL); ERROR_WITH_ERRNO("Failed to execute `fusermount'"); - return WIMLIB_ERR_FUSERMOUNT; + exit(WIMLIB_ERR_FUSERMOUNT); } - ret = waitpid(pid, &status, 0); + ret = wait(&status); if (ret == -1) { ERROR_WITH_ERRNO("Failed to wait for fusermount process to " "terminate"); @@ -1729,31 +2088,35 @@ WIMLIBAPI int wimlib_unmount(const char *dir, int flags) if (status != 0) { ERROR("fusermount exited with status %d", status); - return WIMLIB_ERR_FUSERMOUNT; - } - /* Open message queues between the unmount process and the - * filesystem daemon. */ - ret = open_message_queues(false); - if (ret != 0) - return ret; + /* Try again, but with the `umount' program. This is required + * on other FUSE implementations such as FreeBSD's that do not + * have a `fusermount' program. */ - /* Send a message to the filesystem saying whether to commit or - * not. */ - msg[0] = (flags & WIMLIB_UNMOUNT_FLAG_COMMIT) ? 1 : 0; - msg[1] = (flags & WIMLIB_UNMOUNT_FLAG_CHECK_INTEGRITY) ? 1 : 0; + pid = fork(); + if (pid == -1) { + ERROR_WITH_ERRNO("Failed to fork()"); + return WIMLIB_ERR_FORK; + } + if (pid == 0) { + execlp("umount", "umount", dir, NULL); + ERROR_WITH_ERRNO("Failed to execute `umount'"); + exit(WIMLIB_ERR_FUSERMOUNT); + } - DEBUG("Sending message: %s, %s", - (msg[0] == 0) ? "don't commit" : "commit", - (msg[1] == 0) ? "don't check" : "check"); - ret = mq_send(unmount_to_daemon_mq, msg, 2, 1); - if (ret == -1) { - ERROR("Failed to notify filesystem daemon whether we want to " - "commit changes or not"); - close_message_queues(); - return WIMLIB_ERR_MQUEUE; + ret = wait(&status); + if (ret == -1) { + ERROR_WITH_ERRNO("Failed to wait for `umount' process to " + "terminate"); + return WIMLIB_ERR_FUSERMOUNT; + } + if (status != 0) { + ERROR("`umount' exited with failure status"); + return WIMLIB_ERR_FUSERMOUNT; + } } + /* Wait for a message from the filesytem daemon indicating whether the * filesystem was unmounted successfully (0) or an error occurred (1). * This may take a long time if a big WIM file needs to be rewritten. */ @@ -1763,7 +2126,10 @@ WIMLIBAPI int wimlib_unmount(const char *dir, int flags) * filesystem daemon has crashed or failed for some reason. * * XXX come up with some method to determine if the filesystem - * daemon has really crashed or not. */ + * daemon has really crashed or not. + * + * XXX Idea: have mount daemon write its PID into the WIM file header? + * */ gettimeofday(&now, NULL); timeout.tv_sec = now.tv_sec + 600; @@ -1814,7 +2180,8 @@ WIMLIBAPI int wimlib_unmount(const char *dir, int flags) } WIMLIBAPI int wimlib_mount(WIMStruct *wim_p, int image, const char *dir, - int flags) + int flags, WIMStruct **additional_swms, + unsigned num_additional_swms) { return mount_unsupported_error(); }