/* * smb_rename_check_stream * * For a stream rename the dst path must begin with ':', or "\\:". * We don't yet support stream rename, Return EACCES. * * If not a stream rename, in accordance with the above rule, * it is not valid for either the src or dst to be a stream. * Return EINVAL. */ static int smb_rename_check_stream(smb_fqi_t *src_fqi, smb_fqi_t *dst_fqi) { smb_node_t *src_fnode = src_fqi->fq_fnode; char *src_path = src_fqi->fq_path.pn_path; char *dst_path = dst_fqi->fq_path.pn_path; /* We do not yet support named stream rename - ACCESS DENIED */ if ((dst_path[0] == ':') || ((dst_path[0] == '\\') && (dst_path[1] == ':'))) { return (EACCES); } /* * If not stream rename (above) neither src or dst can be * a named stream. */ if (smb_is_stream_name(dst_path)) return (EINVAL); if (src_fqi->fq_fnode) { if (SMB_IS_STREAM(src_fnode)) return (EINVAL); } else { if (smb_is_stream_name(src_path)) return (EINVAL); } return (0); }
/* * smb_open_subr * * Notes on write-through behaviour. It looks like pre-LM0.12 versions * of the protocol specify the write-through mode when a file is opened, * (SmbOpen, SmbOpenAndX) so the write calls (SmbWrite, SmbWriteAndClose, * SmbWriteAndUnlock) don't need to contain a write-through flag. * * With LM0.12, the open calls (SmbCreateAndX, SmbNtTransactCreate) * don't indicate which write-through mode to use. Instead the write * calls (SmbWriteAndX, SmbWriteRaw) specify the mode on a per call * basis. * * We don't care which open call was used to get us here, we just need * to ensure that the write-through mode flag is copied from the open * parameters to the node. We test the omode write-through flag in all * write functions. * * This function will return NT status codes but it also raises errors, * in which case it won't return to the caller. Be careful how you * handle things in here. * * The following rules apply when processing a file open request: * * - Oplocks must be broken prior to share checking as the break may * cause other clients to close the file, which would affect sharing * checks. * * - Share checks must take place prior to access checks for correct * Windows semantics and to prevent unnecessary NFS delegation recalls. * * - Oplocks must be acquired after open to ensure the correct * synchronization with NFS delegation and FEM installation. * * DOS readonly bit rules * * 1. The creator of a readonly file can write to/modify the size of the file * using the original create fid, even though the file will appear as readonly * to all other fids and via a CIFS getattr call. * The readonly bit therefore cannot be set in the filesystem until the file * is closed (smb_ofile_close). It is accounted for via ofile and node flags. * * 2. A setinfo operation (using either an open fid or a path) to set/unset * readonly will be successful regardless of whether a creator of a readonly * file has an open fid (and has the special privilege mentioned in #1, * above). I.e., the creator of a readonly fid holding that fid will no longer * have a special privilege. * * 3. The DOS readonly bit affects only data and some metadata. * The following metadata can be changed regardless of the readonly bit: * - security descriptors * - DOS attributes * - timestamps * * In the current implementation, the file size cannot be changed (except for * the exceptions in #1 and #2, above). * * * DOS attribute rules * * These rules are specific to creating / opening files and directories. * How the attribute value (specifically ZERO or FILE_ATTRIBUTE_NORMAL) * should be interpreted may differ in other requests. * * - An attribute value equal to ZERO or FILE_ATTRIBUTE_NORMAL means that the * file's attributes should be cleared. * - If FILE_ATTRIBUTE_NORMAL is specified with any other attributes, * FILE_ATTRIBUTE_NORMAL is ignored. * * 1. Creating a new file * - The request attributes + FILE_ATTRIBUTE_ARCHIVE are applied to the file. * * 2. Creating a new directory * - The request attributes + FILE_ATTRIBUTE_DIRECTORY are applied to the file. * - FILE_ATTRIBUTE_ARCHIVE does not get set. * * 3. Overwriting an existing file * - the request attributes are used as search attributes. If the existing * file does not meet the search criteria access is denied. * - otherwise, applies attributes + FILE_ATTRIBUTE_ARCHIVE. * * 4. Opening an existing file or directory * The request attributes are ignored. */ static uint32_t smb_open_subr(smb_request_t *sr) { boolean_t created = B_FALSE; boolean_t last_comp_found = B_FALSE; smb_node_t *node = NULL; smb_node_t *dnode = NULL; smb_node_t *cur_node = NULL; smb_arg_open_t *op = &sr->sr_open; int rc; smb_ofile_t *of; smb_attr_t new_attr; int max_requested = 0; uint32_t max_allowed; uint32_t status = NT_STATUS_SUCCESS; int is_dir; smb_error_t err; boolean_t is_stream = B_FALSE; int lookup_flags = SMB_FOLLOW_LINKS; uint32_t uniq_fid; smb_pathname_t *pn = &op->fqi.fq_path; smb_server_t *sv = sr->sr_server; is_dir = (op->create_options & FILE_DIRECTORY_FILE) ? 1 : 0; /* * If the object being created or opened is a directory * the Disposition parameter must be one of FILE_CREATE, * FILE_OPEN, or FILE_OPEN_IF */ if (is_dir) { if ((op->create_disposition != FILE_CREATE) && (op->create_disposition != FILE_OPEN_IF) && (op->create_disposition != FILE_OPEN)) { smbsr_error(sr, NT_STATUS_INVALID_PARAMETER, ERRDOS, ERROR_INVALID_ACCESS); return (NT_STATUS_INVALID_PARAMETER); } } if (op->desired_access & MAXIMUM_ALLOWED) { max_requested = 1; op->desired_access &= ~MAXIMUM_ALLOWED; } op->desired_access = smb_access_generic_to_file(op->desired_access); if (sr->session->s_file_cnt >= SMB_SESSION_OFILE_MAX) { ASSERT(sr->uid_user); cmn_err(CE_NOTE, "smbsrv[%s\\%s]: TOO_MANY_OPENED_FILES", sr->uid_user->u_domain, sr->uid_user->u_name); smbsr_error(sr, NT_STATUS_TOO_MANY_OPENED_FILES, ERRDOS, ERROR_TOO_MANY_OPEN_FILES); return (NT_STATUS_TOO_MANY_OPENED_FILES); } /* This must be NULL at this point */ sr->fid_ofile = NULL; op->devstate = 0; switch (sr->tid_tree->t_res_type & STYPE_MASK) { case STYPE_DISKTREE: case STYPE_PRINTQ: break; case STYPE_IPC: if ((rc = smb_threshold_enter(&sv->sv_opipe_ct)) != 0) { status = RPC_NT_SERVER_TOO_BUSY; smbsr_error(sr, status, 0, 0); return (status); } /* * No further processing for IPC, we need to either * raise an exception or return success here. */ if ((status = smb_opipe_open(sr)) != NT_STATUS_SUCCESS) smbsr_error(sr, status, 0, 0); smb_threshold_exit(&sv->sv_opipe_ct, sv); return (status); default: smbsr_error(sr, NT_STATUS_BAD_DEVICE_TYPE, ERRDOS, ERROR_BAD_DEV_TYPE); return (NT_STATUS_BAD_DEVICE_TYPE); } smb_pathname_init(sr, pn, pn->pn_path); if (!smb_pathname_validate(sr, pn)) return (sr->smb_error.status); if (strlen(pn->pn_path) >= MAXPATHLEN) { smbsr_error(sr, 0, ERRSRV, ERRfilespecs); return (NT_STATUS_NAME_TOO_LONG); } if (is_dir) { if (!smb_validate_dirname(sr, pn)) return (sr->smb_error.status); } else { if (!smb_validate_object_name(sr, pn)) return (sr->smb_error.status); } cur_node = op->fqi.fq_dnode ? op->fqi.fq_dnode : sr->tid_tree->t_snode; /* * if no path or filename are specified the stream should be * created on cur_node */ if (!is_dir && !pn->pn_pname && !pn->pn_fname && pn->pn_sname) { /* * Can't currently handle a stream on the tree root. * If a stream is being opened return "not found", otherwise * return "access denied". */ if (cur_node == sr->tid_tree->t_snode) { if (op->create_disposition == FILE_OPEN) { smbsr_error(sr, NT_STATUS_OBJECT_NAME_NOT_FOUND, ERRDOS, ERROR_FILE_NOT_FOUND); return (NT_STATUS_OBJECT_NAME_NOT_FOUND); } smbsr_error(sr, NT_STATUS_ACCESS_DENIED, ERRDOS, ERROR_ACCESS_DENIED); return (NT_STATUS_ACCESS_DENIED); } (void) snprintf(op->fqi.fq_last_comp, sizeof (op->fqi.fq_last_comp), "%s%s", cur_node->od_name, pn->pn_sname); op->fqi.fq_dnode = cur_node->n_dnode; smb_node_ref(op->fqi.fq_dnode); } else { if (rc = smb_pathname_reduce(sr, sr->user_cr, pn->pn_path, sr->tid_tree->t_snode, cur_node, &op->fqi.fq_dnode, op->fqi.fq_last_comp)) { smbsr_errno(sr, rc); return (sr->smb_error.status); } } /* * If the access mask has only DELETE set (ignore * FILE_READ_ATTRIBUTES), then assume that this * is a request to delete the link (if a link) * and do not follow links. Otherwise, follow * the link to the target. */ if ((op->desired_access & ~FILE_READ_ATTRIBUTES) == DELETE) lookup_flags &= ~SMB_FOLLOW_LINKS; rc = smb_fsop_lookup_name(sr, kcred, lookup_flags, sr->tid_tree->t_snode, op->fqi.fq_dnode, op->fqi.fq_last_comp, &op->fqi.fq_fnode); if (rc == 0) { last_comp_found = B_TRUE; rc = smb_node_getattr(sr, op->fqi.fq_fnode, &op->fqi.fq_fattr); if (rc != 0) { smb_node_release(op->fqi.fq_fnode); smb_node_release(op->fqi.fq_dnode); smbsr_error(sr, NT_STATUS_INTERNAL_ERROR, ERRDOS, ERROR_INTERNAL_ERROR); return (sr->smb_error.status); } } else if (rc == ENOENT) { last_comp_found = B_FALSE; op->fqi.fq_fnode = NULL; rc = 0; } else { smb_node_release(op->fqi.fq_dnode); smbsr_errno(sr, rc); return (sr->smb_error.status); } /* * The uniq_fid is a CIFS-server-wide unique identifier for an ofile * which is used to uniquely identify open instances for the * VFS share reservation and POSIX locks. */ uniq_fid = SMB_UNIQ_FID(); if (last_comp_found) { node = op->fqi.fq_fnode; dnode = op->fqi.fq_dnode; if (!smb_node_is_file(node) && !smb_node_is_dir(node) && !smb_node_is_symlink(node)) { smb_node_release(node); smb_node_release(dnode); smbsr_error(sr, NT_STATUS_ACCESS_DENIED, ERRDOS, ERRnoaccess); return (NT_STATUS_ACCESS_DENIED); } /* * Reject this request if either: * - the target IS a directory and the client requires that * it must NOT be (required by Lotus Notes) * - the target is NOT a directory and client requires that * it MUST be. */ if (smb_node_is_dir(node)) { if (op->create_options & FILE_NON_DIRECTORY_FILE) { smb_node_release(node); smb_node_release(dnode); smbsr_error(sr, NT_STATUS_FILE_IS_A_DIRECTORY, ERRDOS, ERROR_ACCESS_DENIED); return (NT_STATUS_FILE_IS_A_DIRECTORY); } } else { if ((op->create_options & FILE_DIRECTORY_FILE) || (op->nt_flags & NT_CREATE_FLAG_OPEN_TARGET_DIR)) { smb_node_release(node); smb_node_release(dnode); smbsr_error(sr, NT_STATUS_NOT_A_DIRECTORY, ERRDOS, ERROR_DIRECTORY); return (NT_STATUS_NOT_A_DIRECTORY); } } /* * No more open should be accepted when "Delete on close" * flag is set. */ if (node->flags & NODE_FLAGS_DELETE_ON_CLOSE) { smb_node_release(node); smb_node_release(dnode); smbsr_error(sr, NT_STATUS_DELETE_PENDING, ERRDOS, ERROR_ACCESS_DENIED); return (NT_STATUS_DELETE_PENDING); } /* * Specified file already exists so the operation should fail. */ if (op->create_disposition == FILE_CREATE) { smb_node_release(node); smb_node_release(dnode); smbsr_error(sr, NT_STATUS_OBJECT_NAME_COLLISION, ERRDOS, ERROR_FILE_EXISTS); return (NT_STATUS_OBJECT_NAME_COLLISION); } /* * Windows seems to check read-only access before file * sharing check. * * Check to see if the file is currently readonly (irrespective * of whether this open will make it readonly). */ if (SMB_PATHFILE_IS_READONLY(sr, node)) { /* Files data only */ if (!smb_node_is_dir(node)) { if (op->desired_access & (FILE_WRITE_DATA | FILE_APPEND_DATA)) { smb_node_release(node); smb_node_release(dnode); smbsr_error(sr, NT_STATUS_ACCESS_DENIED, ERRDOS, ERRnoaccess); return (NT_STATUS_ACCESS_DENIED); } } } /* * Oplock break is done prior to sharing checks as the break * may cause other clients to close the file which would * affect the sharing checks. */ smb_node_inc_opening_count(node); smb_open_oplock_break(sr, node); smb_node_wrlock(node); if ((op->create_disposition == FILE_SUPERSEDE) || (op->create_disposition == FILE_OVERWRITE_IF) || (op->create_disposition == FILE_OVERWRITE)) { if ((!(op->desired_access & (FILE_WRITE_DATA | FILE_APPEND_DATA | FILE_WRITE_ATTRIBUTES | FILE_WRITE_EA))) || (!smb_sattr_check(op->fqi.fq_fattr.sa_dosattr, op->dattr))) { smb_node_unlock(node); smb_node_dec_opening_count(node); smb_node_release(node); smb_node_release(dnode); smbsr_error(sr, NT_STATUS_ACCESS_DENIED, ERRDOS, ERRnoaccess); return (NT_STATUS_ACCESS_DENIED); } } status = smb_fsop_shrlock(sr->user_cr, node, uniq_fid, op->desired_access, op->share_access); if (status == NT_STATUS_SHARING_VIOLATION) { smb_node_unlock(node); smb_node_dec_opening_count(node); smb_node_release(node); smb_node_release(dnode); return (status); } status = smb_fsop_access(sr, sr->user_cr, node, op->desired_access); if (status != NT_STATUS_SUCCESS) { smb_fsop_unshrlock(sr->user_cr, node, uniq_fid); smb_node_unlock(node); smb_node_dec_opening_count(node); smb_node_release(node); smb_node_release(dnode); if (status == NT_STATUS_PRIVILEGE_NOT_HELD) { smbsr_error(sr, status, ERRDOS, ERROR_PRIVILEGE_NOT_HELD); return (status); } else { smbsr_error(sr, NT_STATUS_ACCESS_DENIED, ERRDOS, ERROR_ACCESS_DENIED); return (NT_STATUS_ACCESS_DENIED); } } switch (op->create_disposition) { case FILE_SUPERSEDE: case FILE_OVERWRITE_IF: case FILE_OVERWRITE: if (smb_node_is_dir(node)) { smb_fsop_unshrlock(sr->user_cr, node, uniq_fid); smb_node_unlock(node); smb_node_dec_opening_count(node); smb_node_release(node); smb_node_release(dnode); smbsr_error(sr, NT_STATUS_ACCESS_DENIED, ERRDOS, ERROR_ACCESS_DENIED); return (NT_STATUS_ACCESS_DENIED); } op->dattr |= FILE_ATTRIBUTE_ARCHIVE; /* Don't apply readonly bit until smb_ofile_close */ if (op->dattr & FILE_ATTRIBUTE_READONLY) { op->created_readonly = B_TRUE; op->dattr &= ~FILE_ATTRIBUTE_READONLY; } bzero(&new_attr, sizeof (new_attr)); new_attr.sa_dosattr = op->dattr; new_attr.sa_vattr.va_size = op->dsize; new_attr.sa_mask = SMB_AT_DOSATTR | SMB_AT_SIZE; rc = smb_fsop_setattr(sr, sr->user_cr, node, &new_attr); if (rc != 0) { smb_fsop_unshrlock(sr->user_cr, node, uniq_fid); smb_node_unlock(node); smb_node_dec_opening_count(node); smb_node_release(node); smb_node_release(dnode); smbsr_errno(sr, rc); return (sr->smb_error.status); } /* * If file is being replaced, remove existing streams */ if (SMB_IS_STREAM(node) == 0) { rc = smb_fsop_remove_streams(sr, sr->user_cr, node); if (rc != 0) { smb_fsop_unshrlock(sr->user_cr, node, uniq_fid); smb_node_unlock(node); smb_node_dec_opening_count(node); smb_node_release(node); smb_node_release(dnode); return (sr->smb_error.status); } } op->action_taken = SMB_OACT_TRUNCATED; break; default: /* * FILE_OPEN or FILE_OPEN_IF. */ op->action_taken = SMB_OACT_OPENED; break; } } else { /* Last component was not found. */ dnode = op->fqi.fq_dnode; if (is_dir == 0) is_stream = smb_is_stream_name(pn->pn_path); if ((op->create_disposition == FILE_OPEN) || (op->create_disposition == FILE_OVERWRITE)) { smb_node_release(dnode); smbsr_error(sr, NT_STATUS_OBJECT_NAME_NOT_FOUND, ERRDOS, ERROR_FILE_NOT_FOUND); return (NT_STATUS_OBJECT_NAME_NOT_FOUND); } if (pn->pn_fname && smb_is_invalid_filename(pn->pn_fname)) { smb_node_release(dnode); smbsr_error(sr, NT_STATUS_OBJECT_NAME_INVALID, ERRDOS, ERROR_INVALID_NAME); return (NT_STATUS_OBJECT_NAME_INVALID); } /* * lock the parent dir node in case another create * request to the same parent directory comes in. */ smb_node_wrlock(dnode); /* Don't apply readonly bit until smb_ofile_close */ if (op->dattr & FILE_ATTRIBUTE_READONLY) { op->dattr &= ~FILE_ATTRIBUTE_READONLY; op->created_readonly = B_TRUE; } bzero(&new_attr, sizeof (new_attr)); if ((op->crtime.tv_sec != 0) && (op->crtime.tv_sec != UINT_MAX)) { new_attr.sa_mask |= SMB_AT_CRTIME; new_attr.sa_crtime = op->crtime; } if (is_dir == 0) { op->dattr |= FILE_ATTRIBUTE_ARCHIVE; new_attr.sa_dosattr = op->dattr; new_attr.sa_vattr.va_type = VREG; new_attr.sa_vattr.va_mode = is_stream ? S_IRUSR : S_IRUSR | S_IRGRP | S_IROTH | S_IWUSR | S_IWGRP | S_IWOTH; new_attr.sa_mask |= SMB_AT_DOSATTR | SMB_AT_TYPE | SMB_AT_MODE; if (op->dsize) { new_attr.sa_vattr.va_size = op->dsize; new_attr.sa_mask |= SMB_AT_SIZE; } rc = smb_fsop_create(sr, sr->user_cr, dnode, op->fqi.fq_last_comp, &new_attr, &op->fqi.fq_fnode); if (rc != 0) { smb_node_unlock(dnode); smb_node_release(dnode); smbsr_errno(sr, rc); return (sr->smb_error.status); } node = op->fqi.fq_fnode; smb_node_inc_opening_count(node); smb_node_wrlock(node); status = smb_fsop_shrlock(sr->user_cr, node, uniq_fid, op->desired_access, op->share_access); if (status == NT_STATUS_SHARING_VIOLATION) { smb_node_unlock(node); smb_node_dec_opening_count(node); smb_delete_new_object(sr); smb_node_release(node); smb_node_unlock(dnode); smb_node_release(dnode); return (status); } } else { op->dattr |= FILE_ATTRIBUTE_DIRECTORY; new_attr.sa_dosattr = op->dattr; new_attr.sa_vattr.va_type = VDIR; new_attr.sa_vattr.va_mode = 0777; new_attr.sa_mask |= SMB_AT_DOSATTR | SMB_AT_TYPE | SMB_AT_MODE; rc = smb_fsop_mkdir(sr, sr->user_cr, dnode, op->fqi.fq_last_comp, &new_attr, &op->fqi.fq_fnode); if (rc != 0) { smb_node_unlock(dnode); smb_node_release(dnode); smbsr_errno(sr, rc); return (sr->smb_error.status); } node = op->fqi.fq_fnode; smb_node_inc_opening_count(node); smb_node_wrlock(node); } created = B_TRUE; op->action_taken = SMB_OACT_CREATED; } if (max_requested) { smb_fsop_eaccess(sr, sr->user_cr, node, &max_allowed); op->desired_access |= max_allowed; } status = NT_STATUS_SUCCESS; of = smb_ofile_open(sr->tid_tree, node, sr->smb_pid, op, SMB_FTYPE_DISK, uniq_fid, &err); if (of == NULL) { smbsr_error(sr, err.status, err.errcls, err.errcode); status = err.status; } if (status == NT_STATUS_SUCCESS) { if (!smb_tree_is_connected(sr->tid_tree)) { smbsr_error(sr, 0, ERRSRV, ERRinvnid); status = NT_STATUS_UNSUCCESSFUL; } } /* * This MUST be done after ofile creation, so that explicitly * set timestamps can be remembered on the ofile. */ if (status == NT_STATUS_SUCCESS) { if ((rc = smb_set_open_timestamps(sr, of, created)) != 0) { smbsr_errno(sr, rc); status = sr->smb_error.status; } } if (status == NT_STATUS_SUCCESS) { if (smb_node_getattr(sr, node, &op->fqi.fq_fattr) != 0) { smbsr_error(sr, NT_STATUS_INTERNAL_ERROR, ERRDOS, ERROR_INTERNAL_ERROR); status = NT_STATUS_INTERNAL_ERROR; } } /* * smb_fsop_unshrlock is a no-op if node is a directory * smb_fsop_unshrlock is done in smb_ofile_close */ if (status != NT_STATUS_SUCCESS) { if (of == NULL) { smb_fsop_unshrlock(sr->user_cr, node, uniq_fid); } else { smb_ofile_close(of, 0); smb_ofile_release(of); } if (created) smb_delete_new_object(sr); smb_node_unlock(node); smb_node_dec_opening_count(node); smb_node_release(node); if (created) smb_node_unlock(dnode); smb_node_release(dnode); return (status); } /* * Propagate the write-through mode from the open params * to the node: see the notes in the function header. */ if (sr->sr_cfg->skc_sync_enable || (op->create_options & FILE_WRITE_THROUGH)) node->flags |= NODE_FLAGS_WRITE_THROUGH; /* * Set up the fileid and dosattr in open_param for response */ op->fileid = op->fqi.fq_fattr.sa_vattr.va_nodeid; op->dattr = op->fqi.fq_fattr.sa_dosattr; /* * Set up the file type in open_param for the response */ op->ftype = SMB_FTYPE_DISK; sr->smb_fid = of->f_fid; sr->fid_ofile = of; if (smb_node_is_file(node)) { smb_oplock_acquire(sr, node, of); op->dsize = op->fqi.fq_fattr.sa_vattr.va_size; } else { /* directory or symlink */ op->op_oplock_level = SMB_OPLOCK_NONE; op->dsize = 0; } smb_node_dec_opening_count(node); smb_node_unlock(node); if (created) smb_node_unlock(dnode); smb_node_release(node); smb_node_release(dnode); return (NT_STATUS_SUCCESS); }
/* * smb_pathname_init * Parse path: pname\\fname:sname:stype * * Elements of the smb_pathname_t structure are allocated using request * specific storage and will be free'd when the sr is destroyed. * * Populate pn structure elements with the individual elements * of pn->pn_path. pn->pn_sname will contain the whole stream name * including the stream type and preceding colon: :sname:%DATA * pn_stype will point to the stream type within pn_sname. * * If the pname element is missing pn_pname will be set to NULL. * If any other element is missing the pointer in pn will be NULL. */ void smb_pathname_init(smb_request_t *sr, smb_pathname_t *pn, char *path) { char *pname, *fname, *sname; int len; bzero(pn, sizeof (smb_pathname_t)); pn->pn_path = smb_pathname_strdup(sr, path); smb_pathname_preprocess(sr, pn); /* parse pn->pn_path into its constituent parts */ pname = pn->pn_path; fname = strrchr(pn->pn_path, '\\'); if (fname) { if (fname == pname) { pn->pn_pname = NULL; } else { *fname = '\0'; pn->pn_pname = smb_pathname_strdup(sr, pname); *fname = '\\'; } ++fname; } else { fname = pname; pn->pn_pname = NULL; } if (fname[0] == '\0') { pn->pn_fname = NULL; return; } if (!smb_is_stream_name(fname)) { pn->pn_fname = smb_pathname_strdup(sr, fname); return; } /* * find sname and stype in fname. * sname can't be NULL smb_is_stream_name checks this */ sname = strchr(fname, ':'); if (sname == fname) fname = NULL; else { *sname = '\0'; pn->pn_fname = smb_pathname_strdup(sr, fname); *sname = ':'; } pn->pn_sname = smb_pathname_strdup(sr, sname); pn->pn_stype = strchr(pn->pn_sname + 1, ':'); if (pn->pn_stype) { (void) smb_strupr(pn->pn_stype); } else { len = strlen(pn->pn_sname); pn->pn_sname = smb_pathname_strcat(sr, pn->pn_sname, ":$DATA"); pn->pn_stype = pn->pn_sname + len; } ++pn->pn_stype; }
/* * smb_open_subr * * Notes on write-through behaviour. It looks like pre-LM0.12 versions * of the protocol specify the write-through mode when a file is opened, * (SmbOpen, SmbOpenAndX) so the write calls (SmbWrite, SmbWriteAndClose, * SmbWriteAndUnlock) don't need to contain a write-through flag. * * With LM0.12, the open calls (SmbCreateAndX, SmbNtTransactCreate) * don't indicate which write-through mode to use. Instead the write * calls (SmbWriteAndX, SmbWriteRaw) specify the mode on a per call * basis. * * We don't care which open call was used to get us here, we just need * to ensure that the write-through mode flag is copied from the open * parameters to the node. We test the omode write-through flag in all * write functions. * * This function returns NT status codes. * * The following rules apply when processing a file open request: * * - Oplocks must be broken prior to share checking as the break may * cause other clients to close the file, which would affect sharing * checks. * * - Share checks must take place prior to access checks for correct * Windows semantics and to prevent unnecessary NFS delegation recalls. * * - Oplocks must be acquired after open to ensure the correct * synchronization with NFS delegation and FEM installation. * * DOS readonly bit rules * * 1. The creator of a readonly file can write to/modify the size of the file * using the original create fid, even though the file will appear as readonly * to all other fids and via a CIFS getattr call. * The readonly bit therefore cannot be set in the filesystem until the file * is closed (smb_ofile_close). It is accounted for via ofile and node flags. * * 2. A setinfo operation (using either an open fid or a path) to set/unset * readonly will be successful regardless of whether a creator of a readonly * file has an open fid (and has the special privilege mentioned in #1, * above). I.e., the creator of a readonly fid holding that fid will no longer * have a special privilege. * * 3. The DOS readonly bit affects only data and some metadata. * The following metadata can be changed regardless of the readonly bit: * - security descriptors * - DOS attributes * - timestamps * * In the current implementation, the file size cannot be changed (except for * the exceptions in #1 and #2, above). * * * DOS attribute rules * * These rules are specific to creating / opening files and directories. * How the attribute value (specifically ZERO or FILE_ATTRIBUTE_NORMAL) * should be interpreted may differ in other requests. * * - An attribute value equal to ZERO or FILE_ATTRIBUTE_NORMAL means that the * file's attributes should be cleared. * - If FILE_ATTRIBUTE_NORMAL is specified with any other attributes, * FILE_ATTRIBUTE_NORMAL is ignored. * * 1. Creating a new file * - The request attributes + FILE_ATTRIBUTE_ARCHIVE are applied to the file. * * 2. Creating a new directory * - The request attributes + FILE_ATTRIBUTE_DIRECTORY are applied to the file. * - FILE_ATTRIBUTE_ARCHIVE does not get set. * * 3. Overwriting an existing file * - the request attributes are used as search attributes. If the existing * file does not meet the search criteria access is denied. * - otherwise, applies attributes + FILE_ATTRIBUTE_ARCHIVE. * * 4. Opening an existing file or directory * The request attributes are ignored. */ static uint32_t smb_open_subr(smb_request_t *sr) { boolean_t created = B_FALSE; boolean_t last_comp_found = B_FALSE; smb_node_t *node = NULL; smb_node_t *dnode = NULL; smb_node_t *cur_node = NULL; smb_arg_open_t *op = &sr->sr_open; int rc; smb_ofile_t *of; smb_attr_t new_attr; int max_requested = 0; uint32_t max_allowed; uint32_t status = NT_STATUS_SUCCESS; int is_dir; smb_error_t err; boolean_t is_stream = B_FALSE; int lookup_flags = SMB_FOLLOW_LINKS; uint32_t uniq_fid; smb_pathname_t *pn = &op->fqi.fq_path; smb_server_t *sv = sr->sr_server; is_dir = (op->create_options & FILE_DIRECTORY_FILE) ? 1 : 0; /* * If the object being created or opened is a directory * the Disposition parameter must be one of FILE_CREATE, * FILE_OPEN, or FILE_OPEN_IF */ if (is_dir) { if ((op->create_disposition != FILE_CREATE) && (op->create_disposition != FILE_OPEN_IF) && (op->create_disposition != FILE_OPEN)) { return (NT_STATUS_INVALID_PARAMETER); } } if (op->desired_access & MAXIMUM_ALLOWED) { max_requested = 1; op->desired_access &= ~MAXIMUM_ALLOWED; } op->desired_access = smb_access_generic_to_file(op->desired_access); if (sr->session->s_file_cnt >= SMB_SESSION_OFILE_MAX) { ASSERT(sr->uid_user); cmn_err(CE_NOTE, "smbsrv[%s\\%s]: TOO_MANY_OPENED_FILES", sr->uid_user->u_domain, sr->uid_user->u_name); return (NT_STATUS_TOO_MANY_OPENED_FILES); } /* This must be NULL at this point */ sr->fid_ofile = NULL; op->devstate = 0; switch (sr->tid_tree->t_res_type & STYPE_MASK) { case STYPE_DISKTREE: case STYPE_PRINTQ: break; case STYPE_IPC: /* * Security descriptors for pipes are not implemented, * so just setup a reasonable access mask. */ op->desired_access = (READ_CONTROL | SYNCHRONIZE | FILE_READ_DATA | FILE_READ_ATTRIBUTES | FILE_WRITE_DATA | FILE_APPEND_DATA); /* * Limit the number of open pipe instances. */ if ((rc = smb_threshold_enter(&sv->sv_opipe_ct)) != 0) { status = RPC_NT_SERVER_TOO_BUSY; return (status); } /* * No further processing for IPC, we need to either * raise an exception or return success here. */ uniq_fid = SMB_UNIQ_FID(); status = smb_opipe_open(sr, uniq_fid); smb_threshold_exit(&sv->sv_opipe_ct); return (status); default: return (NT_STATUS_BAD_DEVICE_TYPE); } smb_pathname_init(sr, pn, pn->pn_path); if (!smb_pathname_validate(sr, pn)) return (sr->smb_error.status); if (strlen(pn->pn_path) >= SMB_MAXPATHLEN) { return (NT_STATUS_OBJECT_PATH_INVALID); } if (is_dir) { if (!smb_validate_dirname(sr, pn)) return (sr->smb_error.status); } else { if (!smb_validate_object_name(sr, pn)) return (sr->smb_error.status); } cur_node = op->fqi.fq_dnode ? op->fqi.fq_dnode : sr->tid_tree->t_snode; /* * if no path or filename are specified the stream should be * created on cur_node */ if (!is_dir && !pn->pn_pname && !pn->pn_fname && pn->pn_sname) { /* * Can't currently handle a stream on the tree root. * If a stream is being opened return "not found", otherwise * return "access denied". */ if (cur_node == sr->tid_tree->t_snode) { if (op->create_disposition == FILE_OPEN) { return (NT_STATUS_OBJECT_NAME_NOT_FOUND); } return (NT_STATUS_ACCESS_DENIED); } (void) snprintf(op->fqi.fq_last_comp, sizeof (op->fqi.fq_last_comp), "%s%s", cur_node->od_name, pn->pn_sname); op->fqi.fq_dnode = cur_node->n_dnode; smb_node_ref(op->fqi.fq_dnode); } else { rc = smb_pathname_reduce(sr, sr->user_cr, pn->pn_path, sr->tid_tree->t_snode, cur_node, &op->fqi.fq_dnode, op->fqi.fq_last_comp); if (rc != 0) { return (smb_errno2status(rc)); } } /* * If the access mask has only DELETE set (ignore * FILE_READ_ATTRIBUTES), then assume that this * is a request to delete the link (if a link) * and do not follow links. Otherwise, follow * the link to the target. */ if ((op->desired_access & ~FILE_READ_ATTRIBUTES) == DELETE) lookup_flags &= ~SMB_FOLLOW_LINKS; rc = smb_fsop_lookup_name(sr, zone_kcred(), lookup_flags, sr->tid_tree->t_snode, op->fqi.fq_dnode, op->fqi.fq_last_comp, &op->fqi.fq_fnode); if (rc == 0) { last_comp_found = B_TRUE; /* * Need the DOS attributes below, where we * check the search attributes (sattr). */ op->fqi.fq_fattr.sa_mask = SMB_AT_DOSATTR; rc = smb_node_getattr(sr, op->fqi.fq_fnode, zone_kcred(), NULL, &op->fqi.fq_fattr); if (rc != 0) { smb_node_release(op->fqi.fq_fnode); smb_node_release(op->fqi.fq_dnode); return (NT_STATUS_INTERNAL_ERROR); } } else if (rc == ENOENT) { last_comp_found = B_FALSE; op->fqi.fq_fnode = NULL; rc = 0; } else { smb_node_release(op->fqi.fq_dnode); return (smb_errno2status(rc)); } /* * The uniq_fid is a CIFS-server-wide unique identifier for an ofile * which is used to uniquely identify open instances for the * VFS share reservation and POSIX locks. */ uniq_fid = SMB_UNIQ_FID(); if (last_comp_found) { node = op->fqi.fq_fnode; dnode = op->fqi.fq_dnode; if (!smb_node_is_file(node) && !smb_node_is_dir(node) && !smb_node_is_symlink(node)) { smb_node_release(node); smb_node_release(dnode); return (NT_STATUS_ACCESS_DENIED); } /* * Reject this request if either: * - the target IS a directory and the client requires that * it must NOT be (required by Lotus Notes) * - the target is NOT a directory and client requires that * it MUST be. */ if (smb_node_is_dir(node)) { if (op->create_options & FILE_NON_DIRECTORY_FILE) { smb_node_release(node); smb_node_release(dnode); return (NT_STATUS_FILE_IS_A_DIRECTORY); } } else { if ((op->create_options & FILE_DIRECTORY_FILE) || (op->nt_flags & NT_CREATE_FLAG_OPEN_TARGET_DIR)) { smb_node_release(node); smb_node_release(dnode); return (NT_STATUS_NOT_A_DIRECTORY); } } /* * No more open should be accepted when "Delete on close" * flag is set. */ if (node->flags & NODE_FLAGS_DELETE_ON_CLOSE) { smb_node_release(node); smb_node_release(dnode); return (NT_STATUS_DELETE_PENDING); } /* * Specified file already exists so the operation should fail. */ if (op->create_disposition == FILE_CREATE) { smb_node_release(node); smb_node_release(dnode); return (NT_STATUS_OBJECT_NAME_COLLISION); } /* * Windows seems to check read-only access before file * sharing check. * * Check to see if the file is currently readonly (irrespective * of whether this open will make it readonly). */ if (SMB_PATHFILE_IS_READONLY(sr, node)) { /* Files data only */ if (!smb_node_is_dir(node)) { if (op->desired_access & (FILE_WRITE_DATA | FILE_APPEND_DATA)) { smb_node_release(node); smb_node_release(dnode); return (NT_STATUS_ACCESS_DENIED); } } } if ((op->create_disposition == FILE_SUPERSEDE) || (op->create_disposition == FILE_OVERWRITE_IF) || (op->create_disposition == FILE_OVERWRITE)) { if (!smb_sattr_check(op->fqi.fq_fattr.sa_dosattr, op->dattr)) { smb_node_release(node); smb_node_release(dnode); return (NT_STATUS_ACCESS_DENIED); } if (smb_node_is_dir(node)) { smb_node_release(node); smb_node_release(dnode); return (NT_STATUS_ACCESS_DENIED); } } /* MS-FSA 2.1.5.1.2 */ if (op->create_disposition == FILE_SUPERSEDE) op->desired_access |= DELETE; if ((op->create_disposition == FILE_OVERWRITE_IF) || (op->create_disposition == FILE_OVERWRITE)) op->desired_access |= FILE_WRITE_DATA; status = smb_fsop_access(sr, sr->user_cr, node, op->desired_access); if (status != NT_STATUS_SUCCESS) { smb_node_release(node); smb_node_release(dnode); /* SMB1 specific? NT_STATUS_PRIVILEGE_NOT_HELD */ if (status == NT_STATUS_PRIVILEGE_NOT_HELD) { return (status); } else { return (NT_STATUS_ACCESS_DENIED); } } if (max_requested) { smb_fsop_eaccess(sr, sr->user_cr, node, &max_allowed); op->desired_access |= max_allowed; } /* * According to MS "dochelp" mail in Mar 2015, any handle * on which read or write access is granted implicitly * gets "read attributes", even if it was not requested. * This avoids unexpected access failures later that * would happen if these were not granted. */ if ((op->desired_access & FILE_DATA_ALL) != 0) { op->desired_access |= (READ_CONTROL | FILE_READ_ATTRIBUTES); } /* * Oplock break is done prior to sharing checks as the break * may cause other clients to close the file which would * affect the sharing checks. This may block, so set the * file opening count before oplock stuff. */ smb_node_inc_opening_count(node); smb_open_oplock_break(sr, node); smb_node_wrlock(node); /* * Check for sharing violations */ status = smb_fsop_shrlock(sr->user_cr, node, uniq_fid, op->desired_access, op->share_access); if (status == NT_STATUS_SHARING_VIOLATION) { smb_node_unlock(node); smb_node_dec_opening_count(node); smb_node_release(node); smb_node_release(dnode); return (status); } /* * Go ahead with modifications as necessary. */ switch (op->create_disposition) { case FILE_SUPERSEDE: case FILE_OVERWRITE_IF: case FILE_OVERWRITE: op->dattr |= FILE_ATTRIBUTE_ARCHIVE; /* Don't apply readonly bit until smb_ofile_close */ if (op->dattr & FILE_ATTRIBUTE_READONLY) { op->created_readonly = B_TRUE; op->dattr &= ~FILE_ATTRIBUTE_READONLY; } /* * Truncate the file data here. * We set alloc_size = op->dsize later, * after we have an ofile. See: * smb_set_open_attributes */ bzero(&new_attr, sizeof (new_attr)); new_attr.sa_dosattr = op->dattr; new_attr.sa_vattr.va_size = 0; new_attr.sa_mask = SMB_AT_DOSATTR | SMB_AT_SIZE; rc = smb_fsop_setattr(sr, sr->user_cr, node, &new_attr); if (rc != 0) { smb_fsop_unshrlock(sr->user_cr, node, uniq_fid); smb_node_unlock(node); smb_node_dec_opening_count(node); smb_node_release(node); smb_node_release(dnode); return (smb_errno2status(rc)); } /* * If file is being replaced, remove existing streams */ if (SMB_IS_STREAM(node) == 0) { status = smb_fsop_remove_streams(sr, sr->user_cr, node); if (status != 0) { smb_fsop_unshrlock(sr->user_cr, node, uniq_fid); smb_node_unlock(node); smb_node_dec_opening_count(node); smb_node_release(node); smb_node_release(dnode); return (status); } } op->action_taken = SMB_OACT_TRUNCATED; break; default: /* * FILE_OPEN or FILE_OPEN_IF. */ /* * Ignore any user-specified alloc_size for * existing files, to avoid truncation in * smb_set_open_attributes */ op->dsize = 0L; op->action_taken = SMB_OACT_OPENED; break; } } else { /* Last component was not found. */ dnode = op->fqi.fq_dnode; if (is_dir == 0) is_stream = smb_is_stream_name(pn->pn_path); if ((op->create_disposition == FILE_OPEN) || (op->create_disposition == FILE_OVERWRITE)) { smb_node_release(dnode); return (NT_STATUS_OBJECT_NAME_NOT_FOUND); } if (pn->pn_fname && smb_is_invalid_filename(pn->pn_fname)) { smb_node_release(dnode); return (NT_STATUS_OBJECT_NAME_INVALID); } /* * lock the parent dir node in case another create * request to the same parent directory comes in. */ smb_node_wrlock(dnode); /* Don't apply readonly bit until smb_ofile_close */ if (op->dattr & FILE_ATTRIBUTE_READONLY) { op->dattr &= ~FILE_ATTRIBUTE_READONLY; op->created_readonly = B_TRUE; } bzero(&new_attr, sizeof (new_attr)); if ((op->crtime.tv_sec != 0) && (op->crtime.tv_sec != UINT_MAX)) { new_attr.sa_mask |= SMB_AT_CRTIME; new_attr.sa_crtime = op->crtime; } if (is_dir == 0) { op->dattr |= FILE_ATTRIBUTE_ARCHIVE; new_attr.sa_dosattr = op->dattr; new_attr.sa_vattr.va_type = VREG; new_attr.sa_vattr.va_mode = is_stream ? S_IRUSR : S_IRUSR | S_IRGRP | S_IROTH | S_IWUSR | S_IWGRP | S_IWOTH; new_attr.sa_mask |= SMB_AT_DOSATTR | SMB_AT_TYPE | SMB_AT_MODE; /* * We set alloc_size = op->dsize later, * after we have an ofile. See: * smb_set_open_attributes */ rc = smb_fsop_create(sr, sr->user_cr, dnode, op->fqi.fq_last_comp, &new_attr, &op->fqi.fq_fnode); if (rc != 0) { smb_node_unlock(dnode); smb_node_release(dnode); return (smb_errno2status(rc)); } node = op->fqi.fq_fnode; smb_node_inc_opening_count(node); smb_node_wrlock(node); status = smb_fsop_shrlock(sr->user_cr, node, uniq_fid, op->desired_access, op->share_access); if (status == NT_STATUS_SHARING_VIOLATION) { smb_node_unlock(node); smb_node_dec_opening_count(node); smb_delete_new_object(sr); smb_node_release(node); smb_node_unlock(dnode); smb_node_release(dnode); return (status); } } else { op->dattr |= FILE_ATTRIBUTE_DIRECTORY; new_attr.sa_dosattr = op->dattr; new_attr.sa_vattr.va_type = VDIR; new_attr.sa_vattr.va_mode = 0777; new_attr.sa_mask |= SMB_AT_DOSATTR | SMB_AT_TYPE | SMB_AT_MODE; rc = smb_fsop_mkdir(sr, sr->user_cr, dnode, op->fqi.fq_last_comp, &new_attr, &op->fqi.fq_fnode); if (rc != 0) { smb_node_unlock(dnode); smb_node_release(dnode); return (smb_errno2status(rc)); } node = op->fqi.fq_fnode; smb_node_inc_opening_count(node); smb_node_wrlock(node); } created = B_TRUE; op->action_taken = SMB_OACT_CREATED; if (max_requested) { smb_fsop_eaccess(sr, sr->user_cr, node, &max_allowed); op->desired_access |= max_allowed; } /* * We created created this object (we own it) so * grant read/write attributes on this handle, * even if that was not requested. This avoids * unexpected access failures later that would * happen if these were not granted. */ op->desired_access |= (READ_CONTROL | FILE_READ_ATTRIBUTES | FILE_WRITE_ATTRIBUTES); } status = NT_STATUS_SUCCESS; of = smb_ofile_open(sr, node, op, SMB_FTYPE_DISK, uniq_fid, &err); if (of == NULL) { status = err.status; } /* * We might have blocked in smb_ofile_open long enough so a * tree disconnect might have happened. In that case, we've * just added an ofile to a tree that's disconnecting, and * need to undo that to avoid interfering with tear-down of * the tree connection. */ if (status == NT_STATUS_SUCCESS && !smb_tree_is_connected(sr->tid_tree)) { status = NT_STATUS_INVALID_PARAMETER; } /* * This MUST be done after ofile creation, so that explicitly * set timestamps can be remembered on the ofile, and the * readonly flag will be stored "pending" on the node. */ if (status == NT_STATUS_SUCCESS) { if ((rc = smb_set_open_attributes(sr, of)) != 0) { status = smb_errno2status(rc); } } if (status == NT_STATUS_SUCCESS) { /* * We've already done access checks above, * and want this call to succeed even when * !(desired_access & FILE_READ_ATTRIBUTES), * so pass kcred here. */ op->fqi.fq_fattr.sa_mask = SMB_AT_ALL; rc = smb_node_getattr(sr, node, zone_kcred(), of, &op->fqi.fq_fattr); if (rc != 0) { status = NT_STATUS_INTERNAL_ERROR; } } /* * smb_fsop_unshrlock is a no-op if node is a directory * smb_fsop_unshrlock is done in smb_ofile_close */ if (status != NT_STATUS_SUCCESS) { if (of == NULL) { smb_fsop_unshrlock(sr->user_cr, node, uniq_fid); } else { smb_ofile_close(of, 0); smb_ofile_release(of); } if (created) smb_delete_new_object(sr); smb_node_unlock(node); smb_node_dec_opening_count(node); smb_node_release(node); if (created) smb_node_unlock(dnode); smb_node_release(dnode); return (status); } /* * Propagate the write-through mode from the open params * to the node: see the notes in the function header. */ if (sr->sr_cfg->skc_sync_enable || (op->create_options & FILE_WRITE_THROUGH)) node->flags |= NODE_FLAGS_WRITE_THROUGH; /* * Set up the fileid and dosattr in open_param for response */ op->fileid = op->fqi.fq_fattr.sa_vattr.va_nodeid; op->dattr = op->fqi.fq_fattr.sa_dosattr; /* * Set up the file type in open_param for the response */ op->ftype = SMB_FTYPE_DISK; sr->smb_fid = of->f_fid; sr->fid_ofile = of; if (smb_node_is_file(node)) { smb_oplock_acquire(sr, node, of); op->dsize = op->fqi.fq_fattr.sa_vattr.va_size; } else { /* directory or symlink */ op->op_oplock_level = SMB_OPLOCK_NONE; op->dsize = 0; } smb_node_dec_opening_count(node); smb_node_unlock(node); if (created) smb_node_unlock(dnode); smb_node_release(node); smb_node_release(dnode); return (NT_STATUS_SUCCESS); }
/* * smb_com_trans2_find_first2 * * Client Request Value * ============================ ================================== * * UCHAR WordCount 15 * UCHAR TotalDataCount Total size of extended attribute list * UCHAR SetupCount 1 * UCHAR Setup[0] TRANS2_FIND_FIRST2 * * Parameter Block Encoding Description * ============================ ================================== * USHORT SearchAttributes; * USHORT SearchCount; Maximum number of entries to return * USHORT Flags; Additional information: * Bit 0 - close search after this request * Bit 1 - close search if end of search * reached * Bit 2 - return resume keys for each * entry found * Bit 3 - continue search from previous * ending place * Bit 4 - find with backup intent * USHORT InformationLevel; See below * ULONG SearchStorageType; * STRING FileName; Pattern for the search * UCHAR Data[ TotalDataCount ] FEAList if InformationLevel is * QUERY_EAS_FROM_LIST * * Response Parameter Block Description * ============================ ================================== * * USHORT Sid; Search handle * USHORT SearchCount; Number of entries returned * USHORT EndOfSearch; Was last entry returned? * USHORT EaErrorOffset; Offset into EA list if EA error * USHORT LastNameOffset; Offset into data to file name of last * entry, if server needs it to resume * search; else 0 * UCHAR Data[ TotalDataCount ] Level dependent info about the matches * found in the search */ smb_sdrc_t smb_com_trans2_find_first2(smb_request_t *sr, smb_xa_t *xa) { int count; uint16_t sattr, odid; smb_pathname_t *pn; smb_odir_t *od; smb_find_args_t args; uint32_t odir_flags = 0; bzero(&args, sizeof (smb_find_args_t)); if (!STYPE_ISDSK(sr->tid_tree->t_res_type)) { smbsr_error(sr, NT_STATUS_ACCESS_DENIED, ERRDOS, ERROR_ACCESS_DENIED); return (SDRC_ERROR); } pn = &sr->arg.dirop.fqi.fq_path; if (smb_mbc_decodef(&xa->req_param_mb, "%wwww4.u", sr, &sattr, &args.fa_maxcount, &args.fa_fflag, &args.fa_infolev, &pn->pn_path) != 0) { return (SDRC_ERROR); } smb_pathname_init(sr, pn, pn->pn_path); if (!smb_pathname_validate(sr, pn)) return (-1); if (smb_is_stream_name(pn->pn_path)) { smbsr_error(sr, NT_STATUS_OBJECT_NAME_INVALID, ERRDOS, ERROR_INVALID_NAME); return (SDRC_ERROR); } if (args.fa_fflag & SMB_FIND_WITH_BACKUP_INTENT) { sr->user_cr = smb_user_getprivcred(sr->uid_user); odir_flags = SMB_ODIR_OPENF_BACKUP_INTENT; } args.fa_maxdata = smb_trans2_find_get_maxdata(sr, args.fa_infolev, args.fa_fflag); if (args.fa_maxdata == 0) return (SDRC_ERROR); odid = smb_odir_open(sr, pn->pn_path, sattr, odir_flags); if (odid == 0) { if (sr->smb_error.status == NT_STATUS_OBJECT_PATH_NOT_FOUND) { smbsr_error(sr, NT_STATUS_OBJECT_NAME_NOT_FOUND, ERRDOS, ERROR_FILE_NOT_FOUND); } return (SDRC_ERROR); } od = smb_tree_lookup_odir(sr->tid_tree, odid); if (od == NULL) return (SDRC_ERROR); count = smb_trans2_find_entries(sr, xa, od, &args); if (count == -1) { smb_odir_close(od); smb_odir_release(od); return (SDRC_ERROR); } if (count == 0) { smb_odir_close(od); smb_odir_release(od); smbsr_errno(sr, ENOENT); return (SDRC_ERROR); } if ((args.fa_fflag & SMB_FIND_CLOSE_AFTER_REQUEST) || (args.fa_eos && (args.fa_fflag & SMB_FIND_CLOSE_AT_EOS))) { smb_odir_close(od); } /* else leave odir open for trans2_find_next2 */ smb_odir_release(od); (void) smb_mbc_encodef(&xa->rep_param_mb, "wwwww", odid, /* Search ID */ count, /* Search Count */ args.fa_eos, /* End Of Search */ 0, /* EA Error Offset */ args.fa_lno); /* Last Name Offset */ return (SDRC_SUCCESS); }
/* * smb_rename_lookup_src * * Lookup the src node, checking for sharing violations and * breaking any existing BATCH oplock. * Populate sr->arg.dirop.fqi * * Upon success, the dnode and fnode will have holds and the * fnode will be in a critical section. These should be * released using smb_rename_release_src(). * * Returns errno values. */ static int smb_rename_lookup_src(smb_request_t *sr) { smb_node_t *src_node, *tnode; DWORD status; int rc; int count; char *path; smb_fqi_t *src_fqi = &sr->arg.dirop.fqi; if (smb_is_stream_name(src_fqi->fq_path.pn_path)) return (EINVAL); /* Lookup the source node */ tnode = sr->tid_tree->t_snode; path = src_fqi->fq_path.pn_path; rc = smb_pathname_reduce(sr, sr->user_cr, path, tnode, tnode, &src_fqi->fq_dnode, src_fqi->fq_last_comp); if (rc != 0) return (rc); rc = smb_fsop_lookup(sr, sr->user_cr, 0, tnode, src_fqi->fq_dnode, src_fqi->fq_last_comp, &src_fqi->fq_fnode); if (rc != 0) { smb_node_release(src_fqi->fq_dnode); return (rc); } src_node = src_fqi->fq_fnode; rc = smb_rename_check_attr(sr, src_node, src_fqi->fq_sattr); if (rc != 0) { smb_node_release(src_fqi->fq_fnode); smb_node_release(src_fqi->fq_dnode); return (rc); } /* * Break BATCH oplock before ofile checks. If a client * has a file open, this will force a flush or close, * which may affect the outcome of any share checking. */ (void) smb_oplock_break(sr, src_node, SMB_OPLOCK_BREAK_TO_LEVEL_II | SMB_OPLOCK_BREAK_BATCH); /* * Wait (a little) for the oplock break to be * responded to by clients closing handles. * Hold node->n_lock as reader to keep new * ofiles from showing up after we check. */ smb_node_rdlock(src_node); for (count = 0; count <= 12; count++) { status = smb_node_rename_check(src_node); if (status != NT_STATUS_SHARING_VIOLATION) break; smb_node_unlock(src_node); delay(MSEC_TO_TICK(100)); smb_node_rdlock(src_node); } if (status != NT_STATUS_SUCCESS) { smb_node_unlock(src_node); smb_node_release(src_fqi->fq_fnode); smb_node_release(src_fqi->fq_dnode); return (EPIPE); /* = ERRbadshare */ } /* * Note, the combination of these two: * smb_node_rdlock(node); * nbl_start_crit(node->vp, RW_READER); * is equivalent to this call: * smb_node_start_crit(node, RW_READER) * * Cleanup after this point should use: * smb_node_end_crit(src_node) */ nbl_start_crit(src_node->vp, RW_READER); /* * This checks nbl_share_conflict, nbl_lock_conflict */ status = smb_nbl_conflict(src_node, 0, UINT64_MAX, NBL_RENAME); if (status != NT_STATUS_SUCCESS) { smb_node_end_crit(src_node); smb_node_release(src_fqi->fq_fnode); smb_node_release(src_fqi->fq_dnode); if (status == NT_STATUS_SHARING_VIOLATION) return (EPIPE); /* = ERRbadshare */ return (EACCES); } /* NB: Caller expects holds on src_fqi fnode, dnode */ return (0); }
/* * smb_make_link * * Creating a hard link (adding an additional name) for a file. * * If the source and destination are identical, we go through all * the checks but we don't create a link. * * If the file is a symlink we create the hardlink on the target * of the symlink (i.e. use SMB_FOLLOW_LINKS when looking up src). * If the target of the symlink does not exist we fail with ENOENT. * * Returns NT status values. * * Similar to smb_common_rename() above. */ uint32_t smb_make_link(smb_request_t *sr, smb_fqi_t *src_fqi, smb_fqi_t *dst_fqi) { smb_node_t *tnode; char *path; int rc; tnode = sr->tid_tree->t_snode; path = dst_fqi->fq_path.pn_path; /* Cannnot create link on named stream */ if (smb_is_stream_name(src_fqi->fq_path.pn_path) || smb_is_stream_name(dst_fqi->fq_path.pn_path)) { return (NT_STATUS_INVALID_PARAMETER); } /* The source node may already have been provided */ if (src_fqi->fq_fnode) { smb_node_start_crit(src_fqi->fq_fnode, RW_READER); smb_node_ref(src_fqi->fq_fnode); smb_node_ref(src_fqi->fq_dnode); } else { /* lookup and validate src node */ rc = smb_rename_lookup_src(sr); if (rc != 0) return (smb_rename_errno2status(rc)); } /* Not valid to create hardlink for directory */ if (smb_node_is_dir(src_fqi->fq_fnode)) { smb_rename_release_src(sr); return (NT_STATUS_FILE_IS_A_DIRECTORY); } /* * Find the destination dnode and last component. * May already be provided, i.e. when called via * SMB1 trans2 setinfo. */ if (dst_fqi->fq_dnode) { smb_node_ref(dst_fqi->fq_dnode); } else { rc = smb_pathname_reduce(sr, sr->user_cr, path, tnode, tnode, &dst_fqi->fq_dnode, dst_fqi->fq_last_comp); if (rc != 0) { smb_rename_release_src(sr); return (smb_rename_errno2status(rc)); } } /* If CI name match in same directory, we're done */ if ((src_fqi->fq_dnode == dst_fqi->fq_dnode) && (smb_strcasecmp(src_fqi->fq_fnode->od_name, dst_fqi->fq_last_comp, 0) == 0)) { smb_rename_release_src(sr); smb_node_release(dst_fqi->fq_dnode); return (0); } if (smb_is_invalid_filename(dst_fqi->fq_last_comp)) { smb_rename_release_src(sr); smb_node_release(dst_fqi->fq_dnode); return (NT_STATUS_OBJECT_NAME_INVALID); } /* Lookup the destination node. It MUST NOT exist. */ rc = smb_fsop_lookup(sr, sr->user_cr, 0, tnode, dst_fqi->fq_dnode, dst_fqi->fq_last_comp, &dst_fqi->fq_fnode); if (rc == 0) { smb_node_release(dst_fqi->fq_fnode); rc = EEXIST; } if (rc != ENOENT) { smb_rename_release_src(sr); smb_node_release(dst_fqi->fq_dnode); return (smb_rename_errno2status(rc)); } rc = smb_fsop_link(sr, sr->user_cr, src_fqi->fq_fnode, dst_fqi->fq_dnode, dst_fqi->fq_last_comp); if (rc == 0) { smb_node_notify_change(dst_fqi->fq_dnode, FILE_ACTION_ADDED, dst_fqi->fq_last_comp); } smb_rename_release_src(sr); smb_node_release(dst_fqi->fq_dnode); return (smb_rename_errno2status(rc)); }
/* * smb_com_trans2_find_first2 * * Client Request Value * ============================ ================================== * * UCHAR WordCount 15 * UCHAR TotalDataCount Total size of extended attribute list * UCHAR SetupCount 1 * UCHAR Setup[0] TRANS2_FIND_FIRST2 * * Parameter Block Encoding Description * ============================ ================================== * USHORT SearchAttributes; * USHORT SearchCount; Maximum number of entries to return * USHORT Flags; Additional information: * Bit 0 - close search after this request * Bit 1 - close search if end of search * reached * Bit 2 - return resume keys for each * entry found * Bit 3 - continue search from previous * ending place * Bit 4 - find with backup intent * USHORT InformationLevel; See below * ULONG SearchStorageType; * STRING FileName; Pattern for the search * UCHAR Data[ TotalDataCount ] FEAList if InformationLevel is * QUERY_EAS_FROM_LIST * * Response Parameter Block Description * ============================ ================================== * * USHORT Sid; Search handle * USHORT SearchCount; Number of entries returned * USHORT EndOfSearch; Was last entry returned? * USHORT EaErrorOffset; Offset into EA list if EA error * USHORT LastNameOffset; Offset into data to file name of last * entry, if server needs it to resume * search; else 0 * UCHAR Data[ TotalDataCount ] Level dependent info about the matches * found in the search */ smb_sdrc_t smb_com_trans2_find_first2(smb_request_t *sr, smb_xa_t *xa) { int count; uint16_t sattr, odid; char *path; smb_odir_t *od; smb_find_args_t args; boolean_t eos; uint32_t odir_flags = 0; bzero(&args, sizeof (smb_find_args_t)); if (!STYPE_ISDSK(sr->tid_tree->t_res_type)) { smbsr_error(sr, NT_STATUS_ACCESS_DENIED, ERRDOS, ERROR_ACCESS_DENIED); return (SDRC_ERROR); } if (smb_mbc_decodef(&xa->req_param_mb, "%wwww4.u", sr, &sattr, &args.fa_maxcount, &args.fa_fflag, &args.fa_infolev, &path) != 0) { return (SDRC_ERROR); } if (smb_is_stream_name(path)) { smbsr_error(sr, NT_STATUS_OBJECT_NAME_INVALID, ERRDOS, ERROR_INVALID_NAME); return (SDRC_ERROR); } if (args.fa_fflag & SMB_FIND_WITH_BACKUP_INTENT) { sr->user_cr = smb_user_getprivcred(sr->uid_user); odir_flags = SMB_ODIR_OPENF_BACKUP_INTENT; } args.fa_maxdata = smb_trans2_find_get_maxdata(sr, args.fa_infolev, args.fa_fflag); if (args.fa_maxdata == 0) return (SDRC_ERROR); if (sr->smb_flg2 & SMB_FLAGS2_UNICODE) (void) smb_convert_wildcards(path); odid = smb_odir_open(sr, path, sattr, odir_flags); if (odid == 0) return (SDRC_ERROR); od = smb_tree_lookup_odir(sr->tid_tree, odid); if (od == NULL) return (SDRC_ERROR); count = smb_trans2_find_entries(sr, xa, od, &args, &eos); if (count == -1) { smb_odir_close(od); smb_odir_release(od); return (SDRC_ERROR); } if (count == 0) { smb_odir_close(od); smb_odir_release(od); smbsr_errno(sr, ENOENT); return (SDRC_ERROR); } if ((args.fa_fflag & SMB_FIND_CLOSE_AFTER_REQUEST) || (eos && (args.fa_fflag & SMB_FIND_CLOSE_AT_EOS))) { smb_odir_close(od); } /* else leave odir open for trans2_find_next2 */ smb_odir_release(od); (void) smb_mbc_encodef(&xa->rep_param_mb, "wwwww", odid, count, (eos) ? 1 : 0, 0, 0); return (SDRC_SUCCESS); }