|
From: Yura P. <cha...@us...> - 2005-09-24 15:21:01
|
Changes by: cha0smaster Update of /cvsroot/linux-ntfs/ntfsprogs/libntfs In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv31854/libntfs Modified Files: dir.c Log Message: add ntfs_link, update ntfsmount to use it Index: dir.c =================================================================== RCS file: /cvsroot/linux-ntfs/ntfsprogs/libntfs/dir.c,v retrieving revision 1.23 retrieving revision 1.24 diff -u -p -r1.23 -r1.24 --- dir.c 16 Sep 2005 14:28:18 -0000 1.23 +++ dir.c 24 Sep 2005 15:20:49 -0000 1.24 @@ -1406,3 +1406,96 @@ err_out: err = errno; goto out; } + +/** + * ntfs_link - create hard link for file or directory + * @ni: ntfs inode for object to create hard link + * @dir_ni: ntfs inode for directory in which new link should be placed + * @name: unicode name of the new link + * @name_len: length of the name in unicode characters + * + * Return 0 on success or -1 on error with errno set to the error code. + */ +int ntfs_link(ntfs_inode *ni, ntfs_inode *dir_ni, ntfschar *name, u8 name_len) +{ + FILE_NAME_ATTR *fn = NULL; + int fn_len, err; + + ntfs_debug("Entering."); + if (!ni || !dir_ni || !name || !name_len) { + err = errno; + ntfs_error(, "Invalid arguments."); + goto err_out; + } + /* Create FILE_NAME attribute. */ + fn_len = sizeof(FILE_NAME_ATTR) + name_len * sizeof(ntfschar); + fn = calloc(1, fn_len); + if (!fn) { + err = errno; + ntfs_error(, "Not enough memory."); + goto err_out; + } + fn->parent_directory = MK_LE_MREF(dir_ni->mft_no, + le16_to_cpu(dir_ni->mrec->sequence_number)); + fn->file_name_length = name_len; + fn->file_name_type = FILE_NAME_POSIX; + if (ni->mrec->flags & MFT_RECORD_IS_DIRECTORY) + fn->file_attributes = FILE_ATTR_DUP_FILE_NAME_INDEX_PRESENT; + fn->creation_time = utc2ntfs(ni->creation_time); + fn->last_data_change_time = utc2ntfs(ni->last_data_change_time); + fn->last_mft_change_time = utc2ntfs(ni->last_mft_change_time); + fn->last_access_time = utc2ntfs(ni->last_access_time); + memcpy(fn->file_name, name, name_len * sizeof(ntfschar)); + /* Add FILE_NAME attribute to index. */ + if (ntfs_index_add_filename(dir_ni, fn, MK_MREF(ni->mft_no, + le16_to_cpu(ni->mrec->sequence_number)))) { + err = errno; + ntfs_error(, "Failed to add entry to the index."); + goto err_out; + } + /* Add FILE_NAME attribute to inode. */ + if (ntfs_attr_add(ni, AT_FILE_NAME, AT_UNNAMED, 0, (u8*)fn, fn_len)) { + ntfs_index_context *ictx; + + err = errno; + ntfs_error(, "Failed to add FILE_NAME attribute."); + /* Try to remove just added attribute from index. */ + ictx = ntfs_index_ctx_get(dir_ni, I30, 4); + if (!ictx) + goto rollback_failed; + if (ntfs_index_lookup(fn, fn_len, ictx)) { + ntfs_index_ctx_put(ictx); + goto rollback_failed; + } + if (ntfs_index_rm(ictx)) { + ntfs_index_ctx_put(ictx); + goto rollback_failed; + } + goto err_out; + } + /* Increment hard links count. */ + ni->mrec->link_count = cpu_to_le16(le16_to_cpu( + ni->mrec->link_count) + 1); + /* + * Do not set attributes and file size, instead of this mark filenames + * dirty to force attribute and size update during sync. + * NOTE: File size may will be not updated and not all attributes will + * be set, but it is acceptable since windows driver does not update + * all file names when one of the hard links changed. + * FIXME: It will be nice to update them all. + */ + NInoFileNameSetDirty(ni); + /* Done! */ + ntfs_inode_mark_dirty(ni); + free(fn); + ntfs_debug("Done."); + return 0; +rollback_failed: + ntfs_error(, "Rollback failed. Leaving inconsist metadata."); +err_out: + ntfs_error(, "Failed."); + if (fn) + free(fn); + errno = err; + return -1; +} |
