X-Git-Url: https://wimlib.net/git/?a=blobdiff_plain;f=src%2Fntfs-3g_apply.c;h=ba90fae8f51e257c20c20718d85ccce6a1fe46a4;hb=a5f60b5a884906945b841457874c83e609b016af;hp=db289684589ef4b78f1b05107dc53a0ae75c9237;hpb=28d78c881095a7b50be60ed8d506aa15cceb9cae;p=wimlib diff --git a/src/ntfs-3g_apply.c b/src/ntfs-3g_apply.c index db289684..ba90fae8 100644 --- a/src/ntfs-3g_apply.c +++ b/src/ntfs-3g_apply.c @@ -10,22 +10,20 @@ */ /* - * Copyright (C) 2012, 2013, 2014 Eric Biggers + * Copyright (C) 2012, 2013, 2014, 2015 Eric Biggers * - * This file is part of wimlib, a library for working with WIM files. + * This file is free software; you can redistribute it and/or modify it under + * the terms of the GNU Lesser General Public License as published by the Free + * Software Foundation; either version 3 of the License, or (at your option) any + * later version. * - * wimlib is free software; you can redistribute it and/or modify it under the - * 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 General Public License for more + * This file 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 * details. * - * You should have received a copy of the GNU General Public License - * along with wimlib; if not, see http://www.gnu.org/licenses/. + * You should have received a copy of the GNU Lesser General Public License + * along with this file; if not, see http://www.gnu.org/licenses/. */ #ifdef HAVE_CONFIG_H @@ -41,6 +39,7 @@ #include "wimlib/assert.h" #include "wimlib/apply.h" +#include "wimlib/blob_table.h" #include "wimlib/dentry.h" #include "wimlib/encoding.h" #include "wimlib/error.h" @@ -58,7 +57,6 @@ ntfs_3g_get_supported_features(const char *target, supported_features->hidden_files = 1; supported_features->system_files = 1; supported_features->compressed_files = 1; - supported_features->encrypted_directories = 1; supported_features->not_context_indexed_files = 1; supported_features->named_data_streams = 1; supported_features->hard_links = 1; @@ -77,20 +75,20 @@ struct ntfs_3g_apply_ctx { /* Pointer to the open NTFS volume */ ntfs_volume *vol; - ntfs_attr *open_attrs[MAX_OPEN_STREAMS]; + ntfs_attr *open_attrs[MAX_OPEN_FILES]; unsigned num_open_attrs; - ntfs_inode *open_inodes[MAX_OPEN_STREAMS]; + ntfs_inode *open_inodes[MAX_OPEN_FILES]; unsigned num_open_inodes; struct reparse_buffer_disk rpbuf; u8 *reparse_ptr; - /* Offset in the stream currently being read */ + /* Offset in the blob currently being read */ u64 offset; unsigned num_reparse_inodes; - ntfs_inode *ntfs_reparse_inodes[MAX_OPEN_STREAMS]; - struct wim_inode *wim_reparse_inodes[MAX_OPEN_STREAMS]; + ntfs_inode *ntfs_reparse_inodes[MAX_OPEN_FILES]; + struct wim_inode *wim_reparse_inodes[MAX_OPEN_FILES]; }; static size_t @@ -112,41 +110,44 @@ sid_size(const wimlib_SID *sid) * moving the empty SACL earlier in the security descriptor or by removing the * SACL entirely. The latter work-around is valid because an empty SACL is * equivalent to a "null", or non-existent, SACL. - * - Versions up to and including 2013.1.13 reject security descriptors ending - * with an empty DACL (Discretionary Access Control List). This is very - * similar to the SACL bug and should be fixed in the next release after - * 2013.1.13. However, removing the DACL is not a valid workaround because - * this changes the meaning of the security descriptor--- an empty DACL allows - * no access, whereas a "null" DACL allows all access. + * - Versions before 2014.2.15 reject security descriptors ending with an empty + * DACL (Discretionary Access Control List). This is very similar to the SACL + * bug. However, removing the DACL is not a valid workaround because this + * changes the meaning of the security descriptor--- an empty DACL allows no + * access, whereas a "null" DACL allows all access. * * If the security descriptor was fixed, this function returns an allocated * buffer containing the fixed security descriptor, and its size is updated. - * Otherwise (or if no memory is available) the original descriptor is returned. + * Otherwise (or if no memory is available) NULL is returned. */ -static u8 * -sd_fixup(const u8 *_desc, size_t *size_p) +static void * +sd_fixup(const void *_desc, size_t *size_p) { - u32 owner_offset, group_offset, dacl_offset, sacl_offset; + u32 owner_offset, group_offset, dacl_offset; +#if !defined(HAVE_NTFS_MNT_RDONLY) + u32 sacl_offset; +#endif bool owner_valid, group_valid; size_t size = *size_p; - const wimlib_SECURITY_DESCRIPTOR_RELATIVE *desc = - (const wimlib_SECURITY_DESCRIPTOR_RELATIVE*)_desc; + const wimlib_SECURITY_DESCRIPTOR_RELATIVE *desc = _desc; wimlib_SECURITY_DESCRIPTOR_RELATIVE *desc_new; const wimlib_SID *owner, *group, *sid; /* Don't attempt to fix clearly invalid security descriptors. */ if (size < sizeof(wimlib_SECURITY_DESCRIPTOR_RELATIVE)) - return (u8*)_desc; + return NULL; if (le16_to_cpu(desc->control) & wimlib_SE_DACL_PRESENT) dacl_offset = le32_to_cpu(desc->dacl_offset); else dacl_offset = 0; +#if !defined(HAVE_NTFS_MNT_RDONLY) if (le16_to_cpu(desc->control) & wimlib_SE_SACL_PRESENT) sacl_offset = le32_to_cpu(desc->sacl_offset); else sacl_offset = 0; +#endif /* Check if the security descriptor will be affected by one of the bugs. * If not, do nothing and return. @@ -158,7 +159,7 @@ sd_fixup(const u8 *_desc, size_t *size_p) (sacl_offset != 0 && sacl_offset == size - sizeof(wimlib_ACL)) || #endif (dacl_offset != 0 && dacl_offset == size - sizeof(wimlib_ACL)))) - return (u8*)_desc; + return NULL; owner_offset = le32_to_cpu(desc->owner_offset); group_offset = le32_to_cpu(desc->group_offset); @@ -183,12 +184,12 @@ sd_fixup(const u8 *_desc, size_t *size_p) } else if (group_valid) { sid = group; } else { - return (u8*)_desc; + return NULL; } desc_new = MALLOC(size + sid_size(sid)); if (!desc_new) - return (u8*)_desc; + return NULL; memcpy(desc_new, desc, size); if (owner_valid) @@ -197,7 +198,7 @@ sd_fixup(const u8 *_desc, size_t *size_p) desc_new->group_offset = cpu_to_le32(size); memcpy((u8*)desc_new + size, sid, sid_size(sid)); *size_p = size + sid_size(sid); - return (u8*)desc_new; + return desc_new; } /* Set the security descriptor @desc of size @desc_size on the NTFS inode @ni. @@ -206,20 +207,25 @@ static int ntfs_3g_set_security_descriptor(ntfs_inode *ni, const void *desc, size_t desc_size) { struct SECURITY_CONTEXT sec_ctx; - u8 *desc_fixed; + void *desc_fixed = NULL; int ret = 0; memset(&sec_ctx, 0, sizeof(sec_ctx)); sec_ctx.vol = ni->vol; - desc_fixed = sd_fixup(desc, &desc_size); - - if (ntfs_set_ntfs_acl(&sec_ctx, ni, desc_fixed, desc_size, 0)) +retry: + if (ntfs_set_ntfs_acl(&sec_ctx, ni, desc, desc_size, 0)) { + if (desc_fixed == NULL) { + desc_fixed = sd_fixup(desc, &desc_size); + if (desc_fixed != NULL) { + desc = desc_fixed; + goto retry; + } + } ret = WIMLIB_ERR_SET_SECURITY; + } - if (desc_fixed != desc) - FREE(desc_fixed); - + FREE(desc_fixed); return ret; } @@ -277,7 +283,7 @@ ntfs_3g_restore_dos_name(ntfs_inode *ni, ntfs_inode *dir_ni, * UTF-16LE internally... which is annoying because we currently have * the UTF-16LE string but not the multibyte string. */ - ret = utf16le_get_tstr(dentry->short_name, dentry->short_name_nbytes, + ret = utf16le_get_tstr(dentry->d_short_name, dentry->d_short_name_nbytes, &dos_name, &dos_name_nbytes); if (ret) goto out_close; @@ -317,37 +323,61 @@ out_close: return ret; } -/* Create empty named data streams. +static int +ntfs_3g_restore_reparse_point(ntfs_inode *ni, const struct wim_inode *inode, + unsigned blob_size, struct ntfs_3g_apply_ctx *ctx) +{ + complete_reparse_point(&ctx->rpbuf, inode, blob_size); + + if (ntfs_set_ntfs_reparse_data(ni, (const char *)&ctx->rpbuf, + REPARSE_DATA_OFFSET + blob_size, 0)) + { + ERROR_WITH_ERRNO("Failed to set reparse data on \"%s\"", + dentry_full_path( + inode_first_extraction_dentry(inode))); + return WIMLIB_ERR_SET_REPARSE_DATA; + } + + return 0; +} + + +/* + * Create empty attributes (named data streams and potentially a reparse point) + * for the specified file, if there are any. * - * Since these won't have 'struct wim_lookup_table_entry's, they won't show up - * in the call to extract_stream_list(). Hence the need for the special case. + * Since these won't have blob descriptors, they won't show up in the call to + * extract_blob_list(). Hence the need for the special case. */ static int -ntfs_3g_create_any_empty_ads(ntfs_inode *ni, const struct wim_inode *inode, - const struct ntfs_3g_apply_ctx *ctx) +ntfs_3g_create_empty_attributes(ntfs_inode *ni, + const struct wim_inode *inode, + struct ntfs_3g_apply_ctx *ctx) { - for (u16 i = 0; i < inode->i_num_ads; i++) { - const struct wim_ads_entry *entry; - entry = &inode->i_ads_entries[i]; + for (unsigned i = 0; i < inode->i_num_streams; i++) { - /* Not named? */ - if (!entry->stream_name_nbytes) - continue; + const struct wim_inode_stream *strm = &inode->i_streams[i]; + int ret; - /* Not empty? */ - if (entry->lte) + if (stream_blob_resolved(strm) != NULL) continue; - if (ntfs_attr_add(ni, AT_DATA, entry->stream_name, - entry->stream_name_nbytes / - sizeof(utf16lechar), - NULL, 0)) - { - ERROR_WITH_ERRNO("Failed to create named data stream " - "of \"%s\"", dentry_full_path( - inode_first_extraction_dentry(inode))); - return WIMLIB_ERR_NTFS_3G; + if (strm->stream_type == STREAM_TYPE_REPARSE_POINT) { + ret = ntfs_3g_restore_reparse_point(ni, inode, 0, ctx); + if (ret) + return ret; + } else if (stream_is_named_data_stream(strm)) { + if (ntfs_attr_add(ni, AT_DATA, strm->stream_name, + utf16le_len_chars(strm->stream_name), + NULL, 0)) + { + ERROR_WITH_ERRNO("Failed to create named data " + "stream of \"%s\"", + dentry_full_path( + inode_first_extraction_dentry(inode))); + return WIMLIB_ERR_NTFS_3G; + } } } return 0; @@ -386,7 +416,7 @@ ntfs_3g_set_metadata(ntfs_inode *ni, const struct wim_inode *inode, } /* Security descriptor */ - if ((inode->i_security_id >= 0) + if (inode_has_security_descriptor(inode) && !(extract_flags & WIMLIB_EXTRACT_FLAG_NO_ACLS)) { const void *desc; @@ -452,7 +482,7 @@ ntfs_3g_create_dirs_recursive(ntfs_inode *dir_ni, struct wim_dentry *dir, if (!ret) ret = ntfs_3g_set_metadata(ni, child->d_inode, ctx); if (!ret) - ret = ntfs_3g_create_any_empty_ads(ni, child->d_inode, ctx); + ret = ntfs_3g_create_empty_attributes(ni, child->d_inode, ctx); if (!ret) ret = ntfs_3g_create_dirs_recursive(ni, child, ctx); @@ -519,17 +549,12 @@ ntfs_3g_create_directories(struct wim_dentry *root, static struct wim_dentry * ntfs_3g_first_extraction_alias(struct wim_inode *inode) { - struct list_head *next = inode->i_extraction_aliases.next; struct wim_dentry *dentry; - do { - dentry = list_entry(next, struct wim_dentry, - d_extraction_alias_node); + inode_for_each_extraction_alias(dentry, inode) if (dentry_has_short_name(dentry)) - break; - next = next->next; - } while (next != &inode->i_extraction_aliases); - return dentry; + return dentry; + return inode_first_extraction_dentry(inode); } /* @@ -569,12 +594,11 @@ fail: static int ntfs_3g_create_nondirectory(struct wim_inode *inode, - const struct ntfs_3g_apply_ctx *ctx) + struct ntfs_3g_apply_ctx *ctx) { struct wim_dentry *first_dentry; ntfs_inode *dir_ni; ntfs_inode *ni; - struct list_head *next; struct wim_dentry *dentry; int ret; @@ -630,24 +654,20 @@ ntfs_3g_create_nondirectory(struct wim_inode *inode, } /* Create additional links if present. */ - next = inode->i_extraction_aliases.next; - do { - dentry = list_entry(next, struct wim_dentry, - d_extraction_alias_node); + inode_for_each_extraction_alias(dentry, inode) { if (dentry != first_dentry) { ret = ntfs_3g_add_link(ni, dentry); if (ret) goto out_close_ni; } - next = next->next; - } while (next != &inode->i_extraction_aliases); + } /* Set metadata. */ ret = ntfs_3g_set_metadata(ni, inode, ctx); if (ret) goto out_close_ni; - ret = ntfs_3g_create_any_empty_ads(ni, inode, ctx); + ret = ntfs_3g_create_empty_attributes(ni, inode, ctx); out_close_ni: /* Close the inode. */ @@ -688,43 +708,39 @@ ntfs_3g_create_nondirectories(struct list_head *dentry_list, } static int -ntfs_3g_begin_extract_stream_to_attr(struct wim_lookup_table_entry *stream, - ntfs_inode *ni, - struct wim_inode *inode, - ntfschar *stream_name, - struct ntfs_3g_apply_ctx *ctx) +ntfs_3g_begin_extract_blob_instance(struct blob_descriptor *blob, + ntfs_inode *ni, + struct wim_inode *inode, + const struct wim_inode_stream *strm, + struct ntfs_3g_apply_ctx *ctx) { struct wim_dentry *one_dentry = inode_first_extraction_dentry(inode); - size_t stream_name_nchars = 0; + size_t stream_name_nchars; ntfs_attr *attr; - if (stream_name) - for (const ntfschar *p = stream_name; *p; p++) - stream_name_nchars++; + if (unlikely(strm->stream_type == STREAM_TYPE_REPARSE_POINT)) { - if (stream_name_nchars == 0) - stream_name = AT_UNNAMED; - if ((inode->i_attributes & FILE_ATTRIBUTE_REPARSE_POINT) - && (stream_name_nchars == 0)) - { - if (stream->size > REPARSE_DATA_MAX_SIZE) { + if (blob->size > REPARSE_DATA_MAX_SIZE) { ERROR("Reparse data of \"%s\" has size " "%"PRIu64" bytes (exceeds %u bytes)", dentry_full_path(one_dentry), - stream->size, REPARSE_DATA_MAX_SIZE); + blob->size, REPARSE_DATA_MAX_SIZE); return WIMLIB_ERR_INVALID_REPARSE_DATA; } ctx->reparse_ptr = ctx->rpbuf.rpdata; - ctx->rpbuf.rpdatalen = cpu_to_le16(stream->size); - ctx->rpbuf.rpreserved = cpu_to_le16(0); ctx->ntfs_reparse_inodes[ctx->num_reparse_inodes] = ni; ctx->wim_reparse_inodes[ctx->num_reparse_inodes] = inode; ctx->num_reparse_inodes++; return 0; } + /* It's a data stream (may be unnamed or named). */ + wimlib_assert(strm->stream_type == STREAM_TYPE_DATA); + + stream_name_nchars = utf16le_len_chars(strm->stream_name); + if (stream_name_nchars && - (ntfs_attr_add(ni, AT_DATA, stream_name, + (ntfs_attr_add(ni, AT_DATA, strm->stream_name, stream_name_nchars, NULL, 0))) { ERROR_WITH_ERRNO("Failed to create named data stream of \"%s\"", @@ -732,22 +748,23 @@ ntfs_3g_begin_extract_stream_to_attr(struct wim_lookup_table_entry *stream, return WIMLIB_ERR_NTFS_3G; } - /* This should be ensured by extract_stream_list() */ - wimlib_assert(ctx->num_open_attrs < MAX_OPEN_STREAMS); + /* This should be ensured by extract_blob_list() */ + wimlib_assert(ctx->num_open_attrs < MAX_OPEN_FILES); - attr = ntfs_attr_open(ni, AT_DATA, stream_name, stream_name_nchars); + attr = ntfs_attr_open(ni, AT_DATA, strm->stream_name, + stream_name_nchars); if (!attr) { ERROR_WITH_ERRNO("Failed to open data stream of \"%s\"", dentry_full_path(one_dentry)); return WIMLIB_ERR_NTFS_3G; } ctx->open_attrs[ctx->num_open_attrs++] = attr; - ntfs_attr_truncate_solid(attr, stream->size); + ntfs_attr_truncate_solid(attr, blob->size); return 0; } static int -ntfs_3g_cleanup_stream_extract(struct ntfs_3g_apply_ctx *ctx) +ntfs_3g_cleanup_blob_extract(struct ntfs_3g_apply_ctx *ctx) { int ret = 0; @@ -774,50 +791,47 @@ ntfs_3g_cleanup_stream_extract(struct ntfs_3g_apply_ctx *ctx) static ntfs_inode * ntfs_3g_open_inode(struct wim_inode *inode, struct ntfs_3g_apply_ctx *ctx) { - ntfs_inode *ni = NULL; + ntfs_inode *ni; - if (inode->i_visited) { - for (u32 i = 0; i < ctx->num_open_inodes; i++) { + /* If the same blob is being extracted to multiple streams of the same + * inode, then we must only open the inode once. */ + if (unlikely(inode->i_num_streams > 1)) { + for (unsigned i = 0; i < ctx->num_open_inodes; i++) { if (ctx->open_inodes[i]->mft_no == inode->i_mft_no) { - ni = ctx->open_inodes[i]; - break; + return ctx->open_inodes[i]; } } } - if (!ni) { - ni = ntfs_inode_open(ctx->vol, inode->i_mft_no); - ctx->open_inodes[ctx->num_open_inodes++] = ni; - inode->i_visited = 1; - } - if (!ni) { + ni = ntfs_inode_open(ctx->vol, inode->i_mft_no); + if (unlikely(!ni)) { ERROR_WITH_ERRNO("Can't open \"%s\" in NTFS volume", dentry_full_path( inode_first_extraction_dentry(inode))); return NULL; } + + ctx->open_inodes[ctx->num_open_inodes++] = ni; return ni; } static int -ntfs_3g_begin_extract_stream(struct wim_lookup_table_entry *stream, void *_ctx) +ntfs_3g_begin_extract_blob(struct blob_descriptor *blob, void *_ctx) { struct ntfs_3g_apply_ctx *ctx = _ctx; - const struct stream_owner *owners = stream_owners(stream); + const struct blob_extraction_target *targets = blob_extraction_targets(blob); int ret; + ntfs_inode *ni; - for (u32 i = 0; i < stream->out_refcnt; i++) { - struct wim_inode *inode = owners[i].inode; - ntfschar *stream_name = (ntfschar *)owners[i].stream_name; - ntfs_inode *ni; - + for (u32 i = 0; i < blob->out_refcnt; i++) { ret = WIMLIB_ERR_NTFS_3G; - ni = ntfs_3g_open_inode(inode, ctx); + ni = ntfs_3g_open_inode(targets[i].inode, ctx); if (!ni) goto out_cleanup; - ret = ntfs_3g_begin_extract_stream_to_attr(stream, ni, inode, - stream_name, ctx); + ret = ntfs_3g_begin_extract_blob_instance(blob, ni, + targets[i].inode, + targets[i].stream, ctx); if (ret) goto out_cleanup; } @@ -825,10 +839,8 @@ ntfs_3g_begin_extract_stream(struct wim_lookup_table_entry *stream, void *_ctx) goto out; out_cleanup: - ntfs_3g_cleanup_stream_extract(ctx); + ntfs_3g_cleanup_blob_extract(ctx); out: - for (u32 i = 0; i < stream->out_refcnt; i++) - owners[i].inode->i_visited = 0; return ret; } @@ -853,8 +865,7 @@ ntfs_3g_extract_chunk(const void *chunk, size_t size, void *_ctx) } static int -ntfs_3g_end_extract_stream(struct wim_lookup_table_entry *stream, - int status, void *_ctx) +ntfs_3g_end_extract_blob(struct blob_descriptor *blob, int status, void *_ctx) { struct ntfs_3g_apply_ctx *ctx = _ctx; int ret; @@ -865,37 +876,26 @@ ntfs_3g_end_extract_stream(struct wim_lookup_table_entry *stream, } for (u32 i = 0; i < ctx->num_reparse_inodes; i++) { - struct wim_inode *inode = ctx->wim_reparse_inodes[i]; - - ctx->rpbuf.rptag = cpu_to_le32(inode->i_reparse_tag); - - if (ntfs_set_ntfs_reparse_data(ctx->ntfs_reparse_inodes[i], - (const char *)&ctx->rpbuf, - stream->size + REPARSE_DATA_OFFSET, - 0)) - { - ERROR_WITH_ERRNO("Failed to set reparse " - "data on \"%s\"", - dentry_full_path( - inode_first_extraction_dentry(inode))); - ret = WIMLIB_ERR_NTFS_3G; + ret = ntfs_3g_restore_reparse_point(ctx->ntfs_reparse_inodes[i], + ctx->wim_reparse_inodes[i], + blob->size, ctx); + if (ret) goto out; - } } ret = 0; out: - if (ntfs_3g_cleanup_stream_extract(ctx) && !ret) { + if (ntfs_3g_cleanup_blob_extract(ctx) && !ret) { ERROR_WITH_ERRNO("Error writing data to NTFS volume"); ret = WIMLIB_ERR_NTFS_3G; } return ret; } -static uint64_t +static u64 ntfs_3g_count_dentries(const struct list_head *dentry_list) { const struct wim_dentry *dentry; - uint64_t count = 0; + u64 count = 0; list_for_each_entry(dentry, dentry_list, d_extraction_list_node) { count++; @@ -904,7 +904,6 @@ ntfs_3g_count_dentries(const struct list_head *dentry_list) { count++; } - } return count; @@ -952,16 +951,14 @@ ntfs_3g_extract(struct list_head *dentry_list, struct apply_ctx *_ctx) if (ret) goto out_unmount; - /* Extract streams. */ - struct read_stream_list_callbacks cbs = { - .begin_stream = ntfs_3g_begin_extract_stream, - .begin_stream_ctx = ctx, - .consume_chunk = ntfs_3g_extract_chunk, - .consume_chunk_ctx = ctx, - .end_stream = ntfs_3g_end_extract_stream, - .end_stream_ctx = ctx, + /* Extract blobs. */ + struct read_blob_callbacks cbs = { + .begin_blob = ntfs_3g_begin_extract_blob, + .consume_chunk = ntfs_3g_extract_chunk, + .end_blob = ntfs_3g_end_extract_blob, + .ctx = ctx, }; - ret = extract_stream_list(&ctx->common, &cbs); + ret = extract_blob_list(&ctx->common, &cbs); /* We do not need a final pass to set timestamps because libntfs-3g does * not update timestamps automatically (exception: