/* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License (the "License"). * You may not use this file except in compliance with the License. * * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * When distributing Covered Code, include this CDDL HEADER in each * file and include the License file at usr/src/OPENSOLARIS.LICENSE. * If applicable, add the following below this CDDL HEADER, with the * fields enclosed by brackets "[]" replaced with your own identifying * information: Portions Copyright [yyyy] [name of copyright owner] * * CDDL HEADER END */ /* * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved. * Copyright 2014 Nexenta Systems, Inc. All rights reserved. */ /* * This module provides the common open functionality to the various * open and create SMB interface functions. */ #include #include #include #include #include #include #include #include static volatile uint32_t smb_fids = 0; #define SMB_UNIQ_FID() atomic_inc_32_nv(&smb_fids) static uint32_t smb_open_subr(smb_request_t *); extern uint32_t smb_is_executable(char *); static void smb_delete_new_object(smb_request_t *); static int smb_set_open_attributes(smb_request_t *, smb_ofile_t *); static void smb_open_oplock_break(smb_request_t *, smb_node_t *); static boolean_t smb_open_attr_only(smb_arg_open_t *); static boolean_t smb_open_overwrite(smb_arg_open_t *); /* * smb_access_generic_to_file * * Search MSDN for IoCreateFile to see following mapping. * * GENERIC_READ STANDARD_RIGHTS_READ, FILE_READ_DATA, * FILE_READ_ATTRIBUTES and FILE_READ_EA * * GENERIC_WRITE STANDARD_RIGHTS_WRITE, FILE_WRITE_DATA, * FILE_WRITE_ATTRIBUTES, FILE_WRITE_EA, and FILE_APPEND_DATA * * GENERIC_EXECUTE STANDARD_RIGHTS_EXECUTE, SYNCHRONIZE, and FILE_EXECUTE. * * Careful, we have to emulate some Windows behavior here. * When requested access == zero, you get READ_CONTROL. * MacOS 10.7 depends on this. */ uint32_t smb_access_generic_to_file(uint32_t desired_access) { uint32_t access = READ_CONTROL; if (desired_access & GENERIC_ALL) return (FILE_ALL_ACCESS & ~SYNCHRONIZE); if (desired_access & GENERIC_EXECUTE) { desired_access &= ~GENERIC_EXECUTE; access |= (STANDARD_RIGHTS_EXECUTE | SYNCHRONIZE | FILE_EXECUTE); } if (desired_access & GENERIC_WRITE) { desired_access &= ~GENERIC_WRITE; access |= (FILE_GENERIC_WRITE & ~SYNCHRONIZE); } if (desired_access & GENERIC_READ) { desired_access &= ~GENERIC_READ; access |= FILE_GENERIC_READ; } return (access | desired_access); } /* * smb_omode_to_amask * * This function converts open modes used by Open and Open AndX * commands to desired access bits used by NT Create AndX command. */ uint32_t smb_omode_to_amask(uint32_t desired_access) { switch (desired_access & SMB_DA_ACCESS_MASK) { case SMB_DA_ACCESS_READ: return (FILE_GENERIC_READ); case SMB_DA_ACCESS_WRITE: return (FILE_GENERIC_WRITE); case SMB_DA_ACCESS_READ_WRITE: return (FILE_GENERIC_READ | FILE_GENERIC_WRITE); case SMB_DA_ACCESS_EXECUTE: return (FILE_GENERIC_EXECUTE); default: return (FILE_GENERIC_ALL); } } /* * smb_denymode_to_sharemode * * This function converts deny modes used by Open and Open AndX * commands to share access bits used by NT Create AndX command. */ uint32_t smb_denymode_to_sharemode(uint32_t desired_access, char *fname) { switch (desired_access & SMB_DA_SHARE_MASK) { case SMB_DA_SHARE_COMPATIBILITY: if (smb_is_executable(fname)) return (FILE_SHARE_READ | FILE_SHARE_WRITE); return (FILE_SHARE_ALL); case SMB_DA_SHARE_EXCLUSIVE: return (FILE_SHARE_NONE); case SMB_DA_SHARE_DENY_WRITE: return (FILE_SHARE_READ); case SMB_DA_SHARE_DENY_READ: return (FILE_SHARE_WRITE); case SMB_DA_SHARE_DENY_NONE: default: return (FILE_SHARE_READ | FILE_SHARE_WRITE); } } /* * smb_ofun_to_crdisposition * * This function converts open function values used by Open and Open AndX * commands to create disposition values used by NT Create AndX command. */ uint32_t smb_ofun_to_crdisposition(uint16_t ofun) { static int ofun_cr_map[3][2] = { { -1, FILE_CREATE }, { FILE_OPEN, FILE_OPEN_IF }, { FILE_OVERWRITE, FILE_OVERWRITE_IF } }; int row = ofun & SMB_OFUN_OPEN_MASK; int col = (ofun & SMB_OFUN_CREATE_MASK) >> 4; if (row == 3) return (FILE_MAXIMUM_DISPOSITION + 1); return (ofun_cr_map[row][col]); } /* * Retry opens to avoid spurious sharing violations, due to timing * issues between closes and opens. The client that already has the * file open may be in the process of closing it. */ uint32_t smb_common_open(smb_request_t *sr) { smb_arg_open_t *parg; uint32_t status = NT_STATUS_SUCCESS; int count; parg = kmem_alloc(sizeof (*parg), KM_SLEEP); bcopy(&sr->arg.open, parg, sizeof (*parg)); for (count = 0; count <= 4; count++) { if (count != 0) delay(MSEC_TO_TICK(400)); status = smb_open_subr(sr); if (status != NT_STATUS_SHARING_VIOLATION) break; bcopy(parg, &sr->arg.open, sizeof (*parg)); } if (status == NT_STATUS_SHARING_VIOLATION) { smbsr_error(sr, NT_STATUS_SHARING_VIOLATION, ERRDOS, ERROR_SHARING_VIOLATION); } if (status == NT_STATUS_NO_SUCH_FILE) { smbsr_error(sr, NT_STATUS_OBJECT_NAME_NOT_FOUND, ERRDOS, ERROR_FILE_NOT_FOUND); } kmem_free(parg, sizeof (*parg)); return (status); } /* * 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. */ uniq_fid = SMB_UNIQ_FID(); status = smb_opipe_open(sr, uniq_fid); if (status != NT_STATUS_SUCCESS) smbsr_error(sr, status, 0, 0); smb_threshold_exit(&sv->sv_opipe_ct); 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 { 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) { 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, 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); 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); } } } 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); smbsr_error(sr, NT_STATUS_ACCESS_DENIED, ERRDOS, ERRnoaccess); 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); 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); } } if (max_requested) { smb_fsop_eaccess(sr, sr->user_cr, node, &max_allowed); op->desired_access |= max_allowed; } /* * 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; } 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, node, op, SMB_FTYPE_DISK, uniq_fid, &err); if (of == NULL) { smbsr_error(sr, err.status, err.errcls, err.errcode); 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)) { smbsr_error(sr, 0, ERRSRV, ERRinvnid); 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) { smbsr_errno(sr, rc); status = sr->smb_error.status; } } 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) { 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_open_oplock_break * * If the node has an ofile opened with share access none, * (smb_node_share_check = FALSE) only break BATCH oplock. * Otherwise: * If overwriting, break to SMB_OPLOCK_NONE, else * If opening for anything other than attribute access, * break oplock to LEVEL_II. */ static void smb_open_oplock_break(smb_request_t *sr, smb_node_t *node) { smb_arg_open_t *op = &sr->sr_open; uint32_t flags = 0; if (!smb_node_share_check(node)) flags |= SMB_OPLOCK_BREAK_BATCH; if (smb_open_overwrite(op)) { flags |= SMB_OPLOCK_BREAK_TO_NONE; (void) smb_oplock_break(sr, node, flags); } else if (!smb_open_attr_only(op)) { flags |= SMB_OPLOCK_BREAK_TO_LEVEL_II; (void) smb_oplock_break(sr, node, flags); } } /* * smb_open_attr_only * * Determine if file is being opened for attribute access only. * This is used to determine whether it is necessary to break * existing oplocks on the file. */ static boolean_t smb_open_attr_only(smb_arg_open_t *op) { if (((op->desired_access & ~(FILE_READ_ATTRIBUTES | FILE_WRITE_ATTRIBUTES | SYNCHRONIZE | READ_CONTROL)) == 0) && (op->create_disposition != FILE_SUPERSEDE) && (op->create_disposition != FILE_OVERWRITE)) { return (B_TRUE); } return (B_FALSE); } static boolean_t smb_open_overwrite(smb_arg_open_t *op) { if ((op->create_disposition == FILE_SUPERSEDE) || (op->create_disposition == FILE_OVERWRITE_IF) || (op->create_disposition == FILE_OVERWRITE)) { return (B_TRUE); } return (B_FALSE); } /* * smb_set_open_attributes * * Last write time: * - If the last_write time specified in the open params is not 0 or -1, * use it as file's mtime. This will be considered an explicitly set * timestamps, not reset by subsequent writes. * * DOS attributes * - If we created_readonly, we now store the real DOS attributes * (including the readonly bit) so subsequent opens will see it. * * Both are stored "pending" rather than in the file system. * * Returns: errno */ static int smb_set_open_attributes(smb_request_t *sr, smb_ofile_t *of) { smb_attr_t attr; smb_arg_open_t *op = &sr->sr_open; smb_node_t *node = of->f_node; int rc = 0; bzero(&attr, sizeof (smb_attr_t)); if (op->created_readonly) { attr.sa_dosattr = op->dattr | FILE_ATTRIBUTE_READONLY; attr.sa_mask |= SMB_AT_DOSATTR; } if ((op->mtime.tv_sec != 0) && (op->mtime.tv_sec != UINT_MAX)) { attr.sa_vattr.va_mtime = op->mtime; attr.sa_mask |= SMB_AT_MTIME; } /* * Used to have code here to set mtime, ctime, atime * when the open op->create_disposition is any of: * FILE_SUPERSEDE, FILE_OVERWRITE_IF, FILE_OVERWRITE. * We know that in those cases we will have set the * file size, in which case the file system will * update those times, so we don't have to. * * However, keep track of the fact that we modified * the file via this handle, so we can do the evil, * gratuitious mtime update on close that Windows * clients appear to expect. */ if (op->action_taken == SMB_OACT_TRUNCATED) of->f_written = B_TRUE; if (attr.sa_mask != 0) rc = smb_node_setattr(sr, node, of->f_cr, of, &attr); return (rc); } /* * This function is used to delete a newly created object (file or * directory) if an error occurs after creation of the object. */ static void smb_delete_new_object(smb_request_t *sr) { smb_arg_open_t *op = &sr->sr_open; smb_fqi_t *fqi = &(op->fqi); uint32_t flags = 0; if (SMB_TREE_IS_CASEINSENSITIVE(sr)) flags |= SMB_IGNORE_CASE; if (SMB_TREE_SUPPORTS_CATIA(sr)) flags |= SMB_CATIA; if (op->create_options & FILE_DIRECTORY_FILE) (void) smb_fsop_rmdir(sr, sr->user_cr, fqi->fq_dnode, fqi->fq_last_comp, flags); else (void) smb_fsop_remove(sr, sr->user_cr, fqi->fq_dnode, fqi->fq_last_comp, flags); }