X-Git-Url: https://wimlib.net/git/?p=wimlib;a=blobdiff_plain;f=src%2Fntfs-apply.c;h=31b84239d00db6c8621678f2be18ca45a78d9708;hp=47d8652371b34a4e3592243929b8213711916eec;hb=a2993f836221de10e3f3e220d38aa4b72d367a61;hpb=4c88c54d27dc9e9fb5111f4340de7837de758eff diff --git a/src/ntfs-apply.c b/src/ntfs-apply.c index 47d86523..31b84239 100644 --- a/src/ntfs-apply.c +++ b/src/ntfs-apply.c @@ -1,9 +1,9 @@ /* * ntfs-apply.c * - * Apply a WIM image to a NTFS volume, restoring everything we can, including - * security data and alternate data streams. There should be no loss of - * information. + * Apply a WIM image to a NTFS volume. Restore as much information as possible, + * including security data, file attributes, DOS names, and alternate data + * streams. */ /* @@ -12,206 +12,295 @@ * 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 "config.h" -#include "wimlib_internal.h" +#include +#include -#ifdef WITH_NTFS_3G +#include "wimlib_internal.h" +#include "buffer_io.h" #include "dentry.h" #include "lookup_table.h" -#include "io.h" -#include -#include + #include -#include +#include /* security.h before xattrs.h */ #include -#include -#include -#include -#include - -struct ntfs_apply_args { - ntfs_volume *vol; - int extract_flags; - WIMStruct *w; -}; +#include +#include -extern int _ntfs_set_file_security(ntfs_inode *ni, u32 selection, - const char *attr); -extern int _ntfs_set_file_attributes(ntfs_inode *ni, s32 attrib); +static int extract_wim_chunk_to_ntfs_attr(const u8 *buf, size_t len, + u64 offset, void *arg) +{ + ntfs_attr *na = arg; + if (ntfs_attr_pwrite(na, offset, len, buf) == len) { + return 0; + } else { + ERROR_WITH_ERRNO("Error extracting WIM resource to NTFS attribute"); + return WIMLIB_ERR_WRITE; + } +} -/* +/* * Extracts a WIM resource to a NTFS attribute. */ static int -extract_wim_resource_to_ntfs_attr(const struct lookup_table_entry *lte, +extract_wim_resource_to_ntfs_attr(const struct wim_lookup_table_entry *lte, ntfs_attr *na) { - u64 bytes_remaining = wim_resource_size(lte); - char buf[min(WIM_CHUNK_SIZE, bytes_remaining)]; - u64 offset = 0; - int ret = 0; - u8 hash[SHA1_HASH_SIZE]; - - SHA_CTX ctx; - sha1_init(&ctx); - - while (bytes_remaining) { - u64 to_read = min(bytes_remaining, WIM_CHUNK_SIZE); - ret = read_wim_resource(lte, buf, to_read, offset, false); - if (ret != 0) - break; - sha1_update(&ctx, buf, to_read); - if (ntfs_attr_pwrite(na, offset, to_read, buf) != to_read) { - ERROR_WITH_ERRNO("Error extracting WIM resource"); - return WIMLIB_ERR_WRITE; - } - bytes_remaining -= to_read; - offset += to_read; - } - sha1_final(hash, &ctx); - if (!hashes_equal(hash, lte->hash)) { - ERROR("Invalid checksum on a WIM resource " - "(detected when extracting to NTFS stream file)"); - ERROR("The following WIM resource is invalid:"); - print_lookup_table_entry(lte); - return WIMLIB_ERR_INVALID_RESOURCE_HASH; - } - return 0; + return extract_wim_resource(lte, wim_resource_size(lte), + extract_wim_chunk_to_ntfs_attr, na); } -/* Writes the data streams to a NTFS file +/* Writes the data streams of a WIM inode to the data attributes of a NTFS + * inode. + * + * @ni: The NTFS inode to which the streams are to be extracted. * - * @ni: The NTFS inode for the file. - * @dentry: The directory entry in the WIM file. - * @w: The WIMStruct for the WIM containing the image we are applying. + * @dentry: The WIM dentry being extracted. The @d_inode member points to the + * corresponding WIM inode that contains the streams being extracted. + * The WIM dentry itself is only needed to provide a file path for + * better error messages. + * + * @progress_info: Progress information for the image application. The number + * of extracted bytes will be incremented by the uncompressed + * size of each stream extracted. * * Returns 0 on success, nonzero on failure. */ -static int write_ntfs_data_streams(ntfs_inode *ni, const struct dentry *dentry, - WIMStruct *w) +static int write_ntfs_data_streams(ntfs_inode *ni, const struct wim_dentry *dentry, + union wimlib_progress_info *progress_info) { int ret = 0; unsigned stream_idx = 0; ntfschar *stream_name = AT_UNNAMED; u32 stream_name_len = 0; + const struct wim_inode *inode = dentry->d_inode; + struct wim_lookup_table_entry *lte; DEBUG("Writing %u NTFS data stream%s for `%s'", - dentry->num_ads + 1, - (dentry->num_ads == 0 ? "" : "s"), + inode->i_num_ads + 1, + (inode->i_num_ads == 0 ? "" : "s"), dentry->full_path_utf8); + lte = inode->i_lte; while (1) { - struct lookup_table_entry *lte; - ntfs_attr *na; - - lte = dentry_stream_lte(dentry, stream_idx, w->lookup_table); - na = ntfs_attr_open(ni, AT_DATA, stream_name, stream_name_len); - if (!na) { - ERROR_WITH_ERRNO("Failed to open a data stream of " - "extracted file `%s'", - dentry->full_path_utf8); - ret = WIMLIB_ERR_NTFS_3G; - break; + if (stream_name_len) { + /* Create an empty named stream. */ + ret = ntfs_attr_add(ni, AT_DATA, stream_name, + stream_name_len, NULL, 0); + if (ret != 0) { + ERROR_WITH_ERRNO("Failed to create name data " + "stream for extracted file " + "`%s'", + dentry->full_path_utf8); + ret = WIMLIB_ERR_NTFS_3G; + break; + + } } - if (lte) + + /* If there's no lookup table entry, it's an empty stream. + * Otherwise, open the attribute and extract the data. */ + if (lte) { + ntfs_attr *na; + + na = ntfs_attr_open(ni, AT_DATA, stream_name, stream_name_len); + if (!na) { + ERROR_WITH_ERRNO("Failed to open a data stream of " + "extracted file `%s'", + dentry->full_path_utf8); + ret = WIMLIB_ERR_NTFS_3G; + break; + } + + /* The WIM lookup table entry provides the stream + * length, so the NTFS attribute should be resized to + * this length before starting to extract the data. */ + ret = ntfs_attr_truncate_solid(na, wim_resource_size(lte)); + if (ret != 0) { + ntfs_attr_close(na); + break; + } + + /* Actually extract the stream */ ret = extract_wim_resource_to_ntfs_attr(lte, na); - ntfs_attr_close(na); - if (ret != 0) - break; - if (stream_idx == dentry->num_ads) + + /* Close the attribute */ + ntfs_attr_close(na); + if (ret != 0) + break; + + /* Record the number of bytes of uncompressed data that + * have been extracted. */ + progress_info->extract.completed_bytes += wim_resource_size(lte); + } + if (stream_idx == inode->i_num_ads) /* Has the last stream been extracted? */ break; - stream_name = (ntfschar*)dentry->ads_entries[stream_idx].stream_name; - stream_name_len = dentry->ads_entries[stream_idx].stream_name_len / 2; + + /* Get the name and lookup table entry for the next stream. */ + stream_name = (ntfschar*)inode->i_ads_entries[stream_idx].stream_name; + stream_name_len = inode->i_ads_entries[stream_idx].stream_name_len / 2; + lte = inode->i_ads_entries[stream_idx].lte; stream_idx++; } return ret; } +/* Open the NTFS inode that corresponds to the parent of a WIM dentry. Returns + * the opened inode, or NULL on failure. */ +static ntfs_inode *dentry_open_parent_ni(const struct wim_dentry *dentry, + ntfs_volume *vol) +{ + char *p; + const char *dir_name; + ntfs_inode *dir_ni; + char orig; + + p = dentry->full_path_utf8 + dentry->full_path_utf8_len; + do { + p--; + } while (*p != '/'); + + orig = *p; + *p = '\0'; + dir_name = dentry->full_path_utf8; + dir_ni = ntfs_pathname_to_inode(vol, NULL, dir_name); + if (!dir_ni) { + ERROR_WITH_ERRNO("Could not find NTFS inode for `%s'", + dir_name); + } + *p = orig; + return dir_ni; +} + /* - * Makes a NTFS hard link + * Makes a NTFS hard link. * - * It is named @from_dentry->file_name and is located under the directory - * specified by @dir_ni, and it is made to point to the previously extracted - * file located at @to_dentry->extracted_file. + * The hard link is named @from_dentry->file_name and is located under the + * directory specified by @dir_ni, and it is made to point to the previously + * extracted file located at @inode->i_extracted_file. * - * Return 0 on success, nonzero on failure. + * Or, in other words, this adds a new name @from_dentry->full_path_utf8 to an + * existing NTFS inode which already has a name @inode->i_extracted_file. + * + * The new name is made in the POSIX namespace (this is the behavior of + * ntfs_link()). + * + * Return 0 on success, nonzero on failure. dir_ni is closed either way. */ -static int wim_apply_hardlink_ntfs(const struct dentry *from_dentry, - const struct dentry *to_dentry, - ntfs_inode *dir_ni, - ntfs_inode **to_ni_ret) +static int apply_ntfs_hardlink(const struct wim_dentry *from_dentry, + const struct wim_inode *inode, + ntfs_inode *dir_ni) { int ret; ntfs_inode *to_ni; + ntfs_volume *vol; - wimlib_assert(dentry_is_regular_file(from_dentry) - && dentry_is_regular_file(to_dentry)); + vol = dir_ni->vol; + ret = ntfs_inode_close(dir_ni); + if (ret != 0) { + ERROR_WITH_ERRNO("Error closing directory"); + return WIMLIB_ERR_NTFS_3G; + } DEBUG("Extracting NTFS hard link `%s' => `%s'", - from_dentry->full_path_utf8, to_dentry->extracted_file); + from_dentry->full_path_utf8, inode->i_extracted_file); - to_ni = ntfs_pathname_to_inode(dir_ni->vol, NULL, - to_dentry->extracted_file); + to_ni = ntfs_pathname_to_inode(vol, NULL, inode->i_extracted_file); if (!to_ni) { ERROR_WITH_ERRNO("Could not find NTFS inode for `%s'", - to_dentry->extracted_file); + inode->i_extracted_file); return WIMLIB_ERR_NTFS_3G; } + + dir_ni = dentry_open_parent_ni(from_dentry, vol); + if (!dir_ni) { + ntfs_inode_close(to_ni); + return WIMLIB_ERR_NTFS_3G; + } + ret = ntfs_link(to_ni, dir_ni, (ntfschar*)from_dentry->file_name, from_dentry->file_name_len / 2); - if (ret != 0) { + ret |= ntfs_inode_close(dir_ni); + ret |= ntfs_inode_close(to_ni); + if (ret) { ERROR_WITH_ERRNO("Could not create hard link `%s' => `%s'", from_dentry->full_path_utf8, - to_dentry->extracted_file); + inode->i_extracted_file); ret = WIMLIB_ERR_NTFS_3G; } - *to_ni_ret = to_ni; return ret; } +/* Transfers file attributes and possibly a security descriptor from a WIM inode + * to a NTFS inode. + * + * @ni: The NTFS inode to apply the metadata to. + * @dir_ni: The NTFS inode for a directory containing @ni. + * @dentry: The WIM dentry whose inode contains the metadata to apply. + * @w: The WIMStruct for the WIM, through which the table of security + * descriptors can be accessed. + * + * Returns 0 on success, nonzero on failure. + */ static int apply_file_attributes_and_security_data(ntfs_inode *ni, - const struct dentry *dentry, + ntfs_inode *dir_ni, + const struct wim_dentry *dentry, const WIMStruct *w) { + int ret; + struct SECURITY_CONTEXT ctx; + u32 attributes_le32; + const struct wim_inode *inode; + + inode = dentry->d_inode; + DEBUG("Setting NTFS file attributes on `%s' to %#"PRIx32, - dentry->full_path_utf8, dentry->attributes); - if (!_ntfs_set_file_attributes(ni, dentry->attributes)) { + dentry->full_path_utf8, inode->i_attributes); + + attributes_le32 = cpu_to_le32(inode->i_attributes); + memset(&ctx, 0, sizeof(ctx)); + ctx.vol = ni->vol; + ret = ntfs_xattr_system_setxattr(&ctx, XATTR_NTFS_ATTRIB, + ni, dir_ni, + (const char*)&attributes_le32, + sizeof(u32), 0); + if (ret != 0) { ERROR("Failed to set NTFS file attributes on `%s'", dentry->full_path_utf8); return WIMLIB_ERR_NTFS_3G; } - - if (dentry->security_id != -1) { + if (inode->i_security_id != -1) { + const char *desc; const struct wim_security_data *sd; - + sd = wim_const_security_data(w); - wimlib_assert(dentry->security_id < sd->num_entries); + wimlib_assert(inode->i_security_id < sd->num_entries); + desc = (const char *)sd->descriptors[inode->i_security_id]; DEBUG("Applying security descriptor %d to `%s'", - dentry->security_id, dentry->full_path_utf8); - u32 selection = OWNER_SECURITY_INFORMATION | - GROUP_SECURITY_INFORMATION | - DACL_SECURITY_INFORMATION | - SACL_SECURITY_INFORMATION; - - if (!_ntfs_set_file_security(ni, selection, - sd->descriptors[dentry->security_id])) - { + inode->i_security_id, dentry->full_path_utf8); + + ret = ntfs_xattr_system_setxattr(&ctx, XATTR_NTFS_ACL, + ni, dir_ni, desc, + sd->sizes[inode->i_security_id], 0); + + if (ret != 0) { ERROR_WITH_ERRNO("Failed to set security data on `%s'", dentry->full_path_utf8); return WIMLIB_ERR_NTFS_3G; @@ -220,15 +309,19 @@ apply_file_attributes_and_security_data(ntfs_inode *ni, return 0; } -static int apply_reparse_data(ntfs_inode *ni, const struct dentry *dentry, - const WIMStruct *w) +/* + * Transfers the reparse data from a WIM inode (which must represent a reparse + * point) to a NTFS inode. + */ +static int apply_reparse_data(ntfs_inode *ni, const struct wim_dentry *dentry, + union wimlib_progress_info *progress_info) { - struct lookup_table_entry *lte; + struct wim_lookup_table_entry *lte; int ret = 0; - wimlib_assert(dentry->attributes & FILE_ATTRIBUTE_REPARSE_POINT); + lte = inode_unnamed_lte_resolved(dentry->d_inode); - lte = dentry_first_lte(dentry, w->lookup_table); + DEBUG("Applying reparse data to `%s'", dentry->full_path_utf8); if (!lte) { ERROR("Could not find reparse data for `%s'", @@ -237,95 +330,86 @@ static int apply_reparse_data(ntfs_inode *ni, const struct dentry *dentry, } if (wim_resource_size(lte) >= 0xffff) { - ERROR("Reparse data of `%s' is too long (%lu bytes)", + ERROR("Reparse data of `%s' is too long (%"PRIu64" bytes)", dentry->full_path_utf8, wim_resource_size(lte)); return WIMLIB_ERR_INVALID_DENTRY; } - char reparse_data_buf[8 + wim_resource_size(lte)]; - char *p = reparse_data_buf; - p = put_u32(p, dentry->reparse_tag); /* ReparseTag */ + u8 reparse_data_buf[8 + wim_resource_size(lte)]; + u8 *p = reparse_data_buf; + p = put_u32(p, dentry->d_inode->i_reparse_tag); /* ReparseTag */ p = put_u16(p, wim_resource_size(lte)); /* ReparseDataLength */ p = put_u16(p, 0); /* Reserved */ - ret = read_full_wim_resource(lte, p); + ret = read_full_wim_resource(lte, p, 0); if (ret != 0) return ret; - ret = ntfs_set_ntfs_reparse_data(ni, reparse_data_buf, + ret = ntfs_set_ntfs_reparse_data(ni, (char*)reparse_data_buf, wim_resource_size(lte) + 8, 0); if (ret != 0) { ERROR_WITH_ERRNO("Failed to set NTFS reparse data on `%s'", dentry->full_path_utf8); return WIMLIB_ERR_NTFS_3G; } + progress_info->extract.completed_bytes += wim_resource_size(lte); return 0; } -/* +/* * Applies a WIM dentry to a NTFS filesystem. * * @dentry: The WIM dentry to apply * @dir_ni: The NTFS inode for the parent directory - * @w: The WIMStruct for the WIM containing the image we are applying. * * @return: 0 on success; nonzero on failure. */ -static int do_wim_apply_dentry_ntfs(struct dentry *dentry, ntfs_inode *dir_ni, - WIMStruct *w) +static int do_apply_dentry_ntfs(struct wim_dentry *dentry, ntfs_inode *dir_ni, + struct apply_args *args) { int ret = 0; mode_t type; ntfs_inode *ni = NULL; - bool is_hardlink = false; - ntfs_volume *vol = dir_ni->vol; + struct wim_inode *inode = dentry->d_inode; + dentry->is_extracted = 1; - if (dentry->attributes & FILE_ATTRIBUTE_DIRECTORY) { + if (inode->i_attributes & FILE_ATTRIBUTE_DIRECTORY) { type = S_IFDIR; } else { - struct dentry *other; - type = S_IFREG; - /* If this dentry is one of a hard link set of at least 2 - * dentries. If one of the other dentries has already - * been extracted, make a hard link to it. Otherwise, - * extract the file, and set the dentry->extracted_file - * field so that other dentries in the hard link group - * can link to it. */ - list_for_each_entry(other, &dentry->link_group_list, - link_group_list) - { - if (other->extracted_file) { - is_hardlink = true; - ret = wim_apply_hardlink_ntfs(dentry, - other, - dir_ni, - &ni); - if (ret != 0) + if (inode->i_nlink > 1) { + /* Inode has multiple dentries referencing it. */ + if (inode->i_extracted_file) { + /* Already extracted another dentry in the hard + * link group. Make a hard link instead of + * extracting the file data. */ + ret = apply_ntfs_hardlink(dentry, inode, dir_ni); + /* dir_ni was closed */ + goto out; + } else { + /* None of the dentries of this inode have been + * extracted yet, so go ahead and extract the + * first one. */ + FREE(inode->i_extracted_file); + inode->i_extracted_file = STRDUP(dentry->full_path_utf8); + if (!inode->i_extracted_file) { + ret = WIMLIB_ERR_NOMEM; goto out_close_dir_ni; - else - goto out_set_dos_name; + } } } - FREE(dentry->extracted_file); - dentry->extracted_file = STRDUP(dentry->full_path_utf8); - if (!dentry->extracted_file) { - ERROR("Failed to allocate memory for filename"); - return WIMLIB_ERR_NOMEM; - } } - /* - * Create a directory or file. + /* Create a NTFS directory or file. * - * Note: For symbolic links that are not directory junctions, pass - * S_IFREG here, since we manually set the reparse data later. - */ + * Note: For symbolic links that are not directory junctions, S_IFREG is + * passed here, since the reparse data and file attributes are set + * later. */ ni = ntfs_create(dir_ni, 0, (ntfschar*)dentry->file_name, dentry->file_name_len / 2, type); if (!ni) { - ERROR_WITH_ERRNO("Could not create NTFS object for `%s'", + ERROR_WITH_ERRNO("Could not create NTFS inode for `%s'", dentry->full_path_utf8); ret = WIMLIB_ERR_NTFS_3G; goto out_close_dir_ni; @@ -333,81 +417,35 @@ static int do_wim_apply_dentry_ntfs(struct dentry *dentry, ntfs_inode *dir_ni, /* Write the data streams, unless this is a directory or reparse point * */ - if (!dentry_is_directory(dentry) && - !(dentry->attributes & FILE_ATTRIBUTE_REPARSE_POINT)) { - ret = write_ntfs_data_streams(ni, dentry, w); + if (!(inode->i_attributes & (FILE_ATTRIBUTE_REPARSE_POINT | + FILE_ATTRIBUTE_DIRECTORY))) { + ret = write_ntfs_data_streams(ni, dentry, &args->progress); if (ret != 0) goto out_close_dir_ni; } - ret = apply_file_attributes_and_security_data(ni, dentry, w); + ret = apply_file_attributes_and_security_data(ni, dir_ni, dentry, + args->w); if (ret != 0) goto out_close_dir_ni; - if (dentry->attributes & FILE_ATTR_REPARSE_POINT) { - ret = apply_reparse_data(ni, dentry, w); + if (inode->i_attributes & FILE_ATTR_REPARSE_POINT) { + ret = apply_reparse_data(ni, dentry, &args->progress); if (ret != 0) goto out_close_dir_ni; } -out_set_dos_name: /* Set DOS (short) name if given */ if (dentry->short_name_len != 0) { - char *short_name_utf8; size_t short_name_utf8_len; - short_name_utf8 = utf16_to_utf8(dentry->short_name, - dentry->short_name_len, - &short_name_utf8_len); - if (!short_name_utf8) { - ERROR("Out of memory"); - ret = WIMLIB_ERR_NOMEM; + ret = utf16_to_utf8(dentry->short_name, + dentry->short_name_len, + &short_name_utf8, + &short_name_utf8_len); + if (ret != 0) goto out_close_dir_ni; - } - - if (is_hardlink) { - char *p; - char orig; - const char *dir_name; - - /* ntfs_set_ntfs_dos_name() closes the inodes in the - * wrong order if we have applied a hard link. Close - * them ourselves, then re-open then. */ - if (ntfs_inode_close(dir_ni) != 0) { - if (ret == 0) - ret = WIMLIB_ERR_NTFS_3G; - ERROR_WITH_ERRNO("Failed to close directory inode"); - } - if (ntfs_inode_close(ni) != 0) { - if (ret == 0) - ret = WIMLIB_ERR_NTFS_3G; - ERROR_WITH_ERRNO("Failed to close hard link target inode"); - } - p = dentry->full_path_utf8 + dentry->full_path_utf8_len; - do { - p--; - } while (*p != '/'); - - orig = *p; - *p = '\0'; - dir_name = dentry->full_path_utf8; - - dir_ni = ntfs_pathname_to_inode(vol, NULL, dir_name); - *p = orig; - if (!dir_ni) { - ERROR_WITH_ERRNO("Could not find NTFS inode for `%s'", - dir_name); - return WIMLIB_ERR_NTFS_3G; - } - ni = ntfs_pathname_to_inode(vol, dir_ni, - dentry->file_name_utf8); - if (!ni) { - ERROR_WITH_ERRNO("Could not find NTFS inode for `%s'", - dir_name); - return WIMLIB_ERR_NTFS_3G; - } - } DEBUG("Setting short (DOS) name of `%s' to %s", dentry->full_path_utf8, short_name_utf8); @@ -421,38 +459,41 @@ out_set_dos_name: ret = WIMLIB_ERR_NTFS_3G; } /* inodes have been closed by ntfs_set_ntfs_dos_name(). */ - return ret; + goto out; } - out_close_dir_ni: - if (ntfs_inode_close(dir_ni) != 0) { - if (ret == 0) - ret = WIMLIB_ERR_NTFS_3G; - ERROR_WITH_ERRNO("Failed to close directory inode"); - } -out_close_ni: - if (ni && ntfs_inode_close(ni) != 0) { - if (ret == 0) - ret = WIMLIB_ERR_NTFS_3G; - ERROR_WITH_ERRNO("Failed to close inode"); + if (dir_ni) { + if (ni) { + if (ntfs_inode_close_in_dir(ni, dir_ni)) { + if (ret == 0) + ret = WIMLIB_ERR_NTFS_3G; + ERROR_WITH_ERRNO("Failed to close inode for `%s'", + dentry->full_path_utf8); + } + } + if (ntfs_inode_close(dir_ni)) { + if (ret == 0) + ret = WIMLIB_ERR_NTFS_3G; + ERROR_WITH_ERRNO("Failed to close inode of directory " + "containing `%s'", dentry->full_path_utf8); + } } +out: return ret; } -static int wim_apply_root_dentry_ntfs(const struct dentry *dentry, - ntfs_volume *vol, - const WIMStruct *w) +static int apply_root_dentry_ntfs(const struct wim_dentry *dentry, + ntfs_volume *vol, const WIMStruct *w) { ntfs_inode *ni; int ret = 0; - wimlib_assert(dentry_is_directory(dentry)); ni = ntfs_pathname_to_inode(vol, NULL, "/"); if (!ni) { ERROR_WITH_ERRNO("Could not find root NTFS inode"); return WIMLIB_ERR_NTFS_3G; } - ret = apply_file_attributes_and_security_data(ni, dentry, w); + ret = apply_file_attributes_and_security_data(ni, ni, dentry, w); if (ntfs_inode_close(ni) != 0) { ERROR_WITH_ERRNO("Failed to close NTFS inode for root " "directory"); @@ -462,60 +503,103 @@ static int wim_apply_root_dentry_ntfs(const struct dentry *dentry, } /* Applies a WIM dentry to the NTFS volume */ -static int wim_apply_dentry_ntfs(struct dentry *dentry, void *arg) +int apply_dentry_ntfs(struct wim_dentry *dentry, void *arg) { - struct ntfs_apply_args *args = arg; - ntfs_volume *vol = args->vol; - int extract_flags = args->extract_flags; - WIMStruct *w = args->w; - ntfs_inode *dir_ni; + struct apply_args *args = arg; + ntfs_volume *vol = args->vol; + WIMStruct *w = args->w; + struct wim_dentry *orig_dentry; + struct wim_dentry *other; int ret; - char *p; - char orig; - ntfs_inode *close_after_dir; - const char *dir_name; - - wimlib_assert(dentry->full_path_utf8); - - DEBUG("Applying dentry `%s' to NTFS", dentry->full_path_utf8); - - if (extract_flags & WIMLIB_EXTRACT_FLAG_VERBOSE) - puts(dentry->full_path_utf8); + /* Treat the root dentry specially. */ if (dentry_is_root(dentry)) - return wim_apply_root_dentry_ntfs(dentry, vol, w); - - p = dentry->full_path_utf8 + dentry->full_path_utf8_len; - do { - p--; - } while (*p != '/'); - - orig = *p; - *p = '\0'; - dir_name = dentry->full_path_utf8; - - dir_ni = ntfs_pathname_to_inode(vol, NULL, dir_name); - *p = orig; - if (!dir_ni) { - ERROR_WITH_ERRNO("Could not find NTFS inode for `%s'", - dir_name); - return WIMLIB_ERR_NTFS_3G; + return apply_root_dentry_ntfs(dentry, vol, w); + + /* NTFS filename namespaces need careful consideration. A name for a + * NTFS file may be in either the POSIX, Win32, DOS, or Win32+DOS + * namespaces. A NTFS file (a.k.a. inode) may have multiple names in + * multiple directories (i.e. hard links); however, a NTFS file can have + * at most 1 DOS name total. Furthermore, a Win32 name is always + * associated with a DOS name (either as a Win32+DOS name, or a Win32 + * name and a DOS name separately), which implies that a NTFS file can + * have at most 1 Win32 name. + * + * A WIM dentry just contains a "long name", which wimlib makes sure is + * non-empty, and a "short name", which may be empty. So, wimlib must + * map these to the correct NTFS names. wimlib collects all WIM + * dentries that map to the same NTFS inode and factors out the common + * information into a 'struct wim_inode', so this should make the + * mapping a little more obvious. As a NTFS file can have at most 1 DOS + * name, a WIM inode cannot have more than 1 dentry with a non-empty + * short name, and this is checked in the verify_inode() function in + * verify.c. Furthermore, a WIM dentry, if any, that has a DOS name + * must have a long name that corresponds to a Win32 name or Win32+DOS + * name. + * + * WIM dentries that have a long name but no associated short name are + * assumed to be in the POSIX namespace. + * + * So, given a WIM inode that is to map to a NTFS inode, we must apply + * the Win32 and DOS or Win32+DOS names, if they exist, then any + * additional (POSIX) names. A caveat when actually doing this: as + * confirmed by the libntfs-3g authors, ntfs_set_ntfs_dos_name() is only + * guaranteed to associate a DOS name with the appropriate long name if + * it's called when that long name is the only one in existence for that + * file. So, this implies that the correct ordering of function calls + * to extract a NTFS file are: + * + * if (file has a DOS name) { + * - Call ntfs_create() to create long name associated with + * the DOS name (this initially creates a POSIX name) + * - Call ntfs_set_ntfs_dos_name() to associate a DOS name + * with the long name just created. This either changes + * the POSIX name to Win32+DOS, or changes the POSIX name + * to Win32 and creates a separate DOS name. + * } else { + * - Call ntfs_create() to create the first link to the + * file in the POSIX namespace + * } + * - Call ntfs_link() to create the other names of the file, in the + * POSIX namespace. + */ +again: + orig_dentry = NULL; + if (!dentry->d_inode->i_dos_name_extracted && + dentry->short_name_len == 0) + { + inode_for_each_dentry(other, dentry->d_inode) { + if (other->short_name_len != 0) { + orig_dentry = dentry; + dentry = other; + break; + } + } + } + dentry->d_inode->i_dos_name_extracted = 1; + ntfs_inode *dir_ni = dentry_open_parent_ni(dentry, vol); + if (dir_ni) { + ret = do_apply_dentry_ntfs(dentry, dir_ni, arg); + if (ret == 0 && orig_dentry != NULL) { + dentry = orig_dentry; + goto again; + } + } else { + ret = WIMLIB_ERR_NTFS_3G; } - DEBUG("Found NTFS inode for `%s'", dir_name); - return do_wim_apply_dentry_ntfs(dentry, dir_ni, w); + return ret; } -static int wim_apply_dentry_timestamps(struct dentry *dentry, void *arg) +/* Transfers the 100-nanosecond precision timestamps from a WIM dentry to a NTFS + * inode */ +int apply_dentry_timestamps_ntfs(struct wim_dentry *dentry, void *arg) { - struct ntfs_apply_args *args = arg; - ntfs_volume *vol = args->vol; - int extract_flags = args->extract_flags; - WIMStruct *w = args->w; - char *p; - char buf[24]; + struct apply_args *args = arg; + ntfs_volume *vol = args->vol; + u8 *p; + u8 buf[24]; ntfs_inode *ni; - int ret = 0; - + int ret; DEBUG("Setting timestamps on `%s'", dentry->full_path_utf8); @@ -527,10 +611,10 @@ static int wim_apply_dentry_timestamps(struct dentry *dentry, void *arg) } p = buf; - p = put_u64(p, dentry->creation_time); - p = put_u64(p, dentry->last_write_time); - p = put_u64(p, dentry->last_access_time); - ret = ntfs_inode_set_times(ni, buf, 3 * sizeof(u64), 0); + p = put_u64(p, dentry->d_inode->i_creation_time); + p = put_u64(p, dentry->d_inode->i_last_write_time); + p = put_u64(p, dentry->d_inode->i_last_access_time); + ret = ntfs_inode_set_times(ni, (const char*)buf, 3 * sizeof(u64), 0); if (ret != 0) { ERROR_WITH_ERRNO("Failed to set NTFS timestamps on `%s'", dentry->full_path_utf8); @@ -545,88 +629,3 @@ static int wim_apply_dentry_timestamps(struct dentry *dentry, void *arg) } return ret; } - -static int do_wim_apply_image_ntfs(WIMStruct *w, const char *device, int extract_flags) -{ - ntfs_volume *vol; - int ret; - - vol = ntfs_mount(device, 0); - if (!vol) { - ERROR_WITH_ERRNO("Failed to mount NTFS volume `%s'", device); - return WIMLIB_ERR_NTFS_3G; - } - struct ntfs_apply_args args = { - .vol = vol, - .extract_flags = extract_flags, - .w = w, - }; - ret = for_dentry_in_tree(wim_root_dentry(w), wim_apply_dentry_ntfs, - &args); - - if (ret != 0) - goto out; - DEBUG("Setting NTFS timestamps"); - ret = for_dentry_in_tree_depth(wim_root_dentry(w), - wim_apply_dentry_timestamps, - &args); -out: - if (ntfs_umount(vol, FALSE) != 0) { - ERROR_WITH_ERRNO("Failed to unmount NTFS volume `%s'", device); - if (ret == 0) - ret = WIMLIB_ERR_NTFS_3G; - } - return ret; -} - - -/* - * API entry point for applying a WIM image to a NTFS volume. - * - * Please note that this is a NTFS *volume* and not a directory. The intention - * is that the volume contain an empty filesystem, and the WIM image contain a - * full filesystem to be applied to the volume. - */ -WIMLIBAPI int wimlib_apply_image_to_ntfs_volume(WIMStruct *w, int image, - const char *device, int flags) -{ - int ret; - - if (!device) - return WIMLIB_ERR_INVALID_PARAM; - if (image == WIM_ALL_IMAGES) { - ERROR("Can only apply a single image when applying " - "directly to a NTFS volume"); - return WIMLIB_ERR_INVALID_PARAM; - } - if (flags & (WIMLIB_EXTRACT_FLAG_SYMLINK | WIMLIB_EXTRACT_FLAG_HARDLINK)) { - ERROR("Cannot specify symlink or hardlink flags when applying "); - ERROR("directly to a NTFS volume"); - return WIMLIB_ERR_INVALID_PARAM; - } - ret = wimlib_select_image(w, image); - if (ret != 0) - return ret; - -#if 0 - if (getuid() != 0) { - ERROR("We are not root, but NTFS-3g requires root privileges to set arbitrary"); - ERROR("security data on the NTFS filesystem. Please run this program as root"); - ERROR("if you want to extract a WIM image while preserving NTFS-specific"); - ERROR("information."); - - return WIMLIB_ERR_NOT_ROOT; - } -#endif - return do_wim_apply_image_ntfs(w, device, flags); -} - -#else /* WITH_NTFS_3G */ -WIMLIBAPI int wimlib_apply_image_to_ntfs_volume(WIMStruct *w, int image, - const char *device, int flags) -{ - ERROR("wimlib was compiled without support for NTFS-3g, so"); - ERROR("we cannot apply a WIM image directly to a NTFS volume"); - return WIMLIB_ERR_UNSUPPORTED; -} -#endif /* WITH_NTFS_3G */