/*
* If the enumeration request is for tree data, handle the request
* here. Otherwise, pass it on to the ofiles.
*
* This function should be called with a hold on the tree.
*/
int
smb_tree_enum(smb_tree_t *tree, smb_svcenum_t *svcenum)
{
smb_ofile_t *of;
smb_ofile_t *next;
int rc;
ASSERT(tree);
ASSERT(tree->t_magic == SMB_TREE_MAGIC);
if (svcenum->se_type == SMB_SVCENUM_TYPE_TREE)
return (smb_tree_enum_private(tree, svcenum));
of = smb_tree_get_ofile(tree, NULL);
while (of) {
ASSERT(of->f_tree == tree);
rc = smb_ofile_enum(of, svcenum);
if (rc != 0) {
smb_ofile_release(of);
break;
}
next = smb_tree_get_ofile(tree, of);
smb_ofile_release(of);
of = next;
}
return (rc);
}
/*
* smb2sr_lookup_fid
*
* Setup sr->fid_ofile, either inherited from a related command,
* or obtained via FID lookup.
*/
uint32_t
smb2sr_lookup_fid(smb_request_t *sr, smb2fid_t *fid)
{
boolean_t related = sr->smb2_hdr_flags &
SMB2_FLAGS_RELATED_OPERATIONS;
if ((!related || fid->temporal != ~0LL) &&
sr->fid_ofile != NULL) {
smb_ofile_request_complete(sr->fid_ofile);
smb_ofile_release(sr->fid_ofile);
sr->fid_ofile = NULL;
}
if (related && fid->temporal == ~0LL &&
sr->fid_ofile != NULL) {
sr->smb_fid = sr->fid_ofile->f_fid;
} else {
ASSERT(sr->fid_ofile == NULL);
sr->smb_fid = (uint16_t)fid->temporal;
sr->fid_ofile = smb_ofile_lookup_by_fid(sr,
sr->smb_fid);
}
if (sr->fid_ofile == NULL)
return (NT_STATUS_FILE_CLOSED);
return (0);
}
void
smb_post_nt_create_andx(smb_request_t *sr)
{
DTRACE_SMB_1(op__NtCreateX__done, smb_request_t *, sr);
if (sr->arg.open.dir != NULL) {
smb_ofile_release(sr->arg.open.dir);
sr->arg.open.dir = NULL;
}
}
/*
* Close a file by its unique id.
*/
int
smb_tree_fclose(smb_tree_t *tree, uint32_t uniqid)
{
smb_ofile_t *of;
ASSERT(tree);
ASSERT(tree->t_magic == SMB_TREE_MAGIC);
if ((of = smb_ofile_lookup_by_uniqid(tree, uniqid)) == NULL)
return (ENOENT);
if (smb_ofile_disallow_fclose(of)) {
smb_ofile_release(of);
return (EACCES);
}
smb_ofile_close(of, 0);
smb_ofile_release(of);
return (0);
}
void
smb_post_nt_transact_create(smb_request_t *sr, smb_xa_t *xa)
{
smb_sd_t *sd = sr->arg.open.sd;
DTRACE_SMB_2(op__NtTransactCreate__done, smb_request_t *, sr,
smb_xa_t *, xa);
if (sd) {
smb_sd_term(sd);
kmem_free(sd, sizeof (smb_sd_t));
}
if (sr->arg.open.dir != NULL)
smb_ofile_release(sr->arg.open.dir);
}
/*
* This function closes the file passed in (if appropriate) and returns the
* next open file in the list of open files of the tree of the open file passed
* in. It requires that the list of open files of the tree be entered in
* RW_READER mode before being called.
*/
static smb_ofile_t *
smb_ofile_close_and_next(smb_ofile_t *of)
{
smb_ofile_t *next_of;
smb_tree_t *tree;
ASSERT(of);
ASSERT(of->f_magic == SMB_OFILE_MAGIC);
mutex_enter(&of->f_mutex);
switch (of->f_state) {
case SMB_OFILE_STATE_OPEN:
/* The file is still open. */
of->f_refcnt++;
ASSERT(of->f_refcnt);
tree = of->f_tree;
mutex_exit(&of->f_mutex);
smb_llist_exit(&of->f_tree->t_ofile_list);
smb_ofile_close(of, 0);
smb_ofile_release(of);
smb_llist_enter(&tree->t_ofile_list, RW_READER);
next_of = smb_llist_head(&tree->t_ofile_list);
break;
case SMB_OFILE_STATE_CLOSING:
case SMB_OFILE_STATE_CLOSED:
/*
* The ofile exists but is closed or
* in the process being closed.
*/
mutex_exit(&of->f_mutex);
next_of = smb_llist_next(&of->f_tree->t_ofile_list, of);
break;
default:
ASSERT(0);
mutex_exit(&of->f_mutex);
next_of = smb_llist_next(&of->f_tree->t_ofile_list, of);
break;
}
return (next_of);
}
/*
* 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_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);
}
/*
* This is the common dispatch function for SMB2, used for both
* synchronous and asynchronous requests. In the async case,
* this runs twice: once for the initial processing where the
* initial handler returns NT_STATUS_PENDING, and then a second
* time (with async_func != NULL) for the "real work".
* Note the async_func == NULL for "normal" calls, and the
* handler function is taken from the dispatch table.
*/
static int
smb2sr_dispatch(smb_request_t *sr,
smb_sdrc_t (*async_func)(smb_request_t *))
{
const smb_disp_entry_t *sdd;
smb_disp_stats_t *sds;
smb_session_t *session;
smb_server_t *server;
boolean_t related;
int rc = 0;
session = sr->session;
server = session->s_server;
/*
* Validate the commmand code, get dispatch table entries.
* [MS-SMB2] 3.3.5.2.6 Handling Incorrectly Formatted...
*
* The last slot in the dispatch table is used to handle
* invalid commands. Same for statistics.
*/
if (sr->smb2_cmd_code < SMB2_INVALID_CMD) {
sdd = &smb2_disp_table[sr->smb2_cmd_code];
sds = &server->sv_disp_stats2[sr->smb2_cmd_code];
} else {
sdd = &smb2_disp_table[SMB2_INVALID_CMD];
sds = &server->sv_disp_stats2[SMB2_INVALID_CMD];
}
if (sr->smb2_hdr_flags & SMB2_FLAGS_SERVER_TO_REDIR) {
smb2sr_put_error(sr, NT_STATUS_INVALID_PARAMETER);
goto done;
}
/*
* If this command is NOT "related" to the previous,
* clear out the UID, TID, FID state that might be
* left over from the previous command.
*
* Also, if the command IS related, but is declining to
* inherit the previous UID or TID, then clear out the
* previous session or tree now. This simplifies the
* inheritance logic below. Similar logic for FIDs
* happens in smb2sr_lookup_fid()
*/
related = (sr->smb2_hdr_flags & SMB2_FLAGS_RELATED_OPERATIONS);
if (!related &&
sr->fid_ofile != NULL) {
smb_ofile_request_complete(sr->fid_ofile);
smb_ofile_release(sr->fid_ofile);
sr->fid_ofile = NULL;
}
if ((!related || sr->smb_tid != INHERIT_ID) &&
sr->tid_tree != NULL) {
smb_tree_release(sr->tid_tree);
sr->tid_tree = NULL;
}
if ((!related || sr->smb_uid != INHERIT_ID) &&
sr->uid_user != NULL) {
smb_user_release(sr->uid_user);
sr->uid_user = NULL;
}
/*
* Make sure we have a user and tree as needed
* according to the flags for the this command.
* In a compound, a "related" command may inherit
* the UID, TID, and FID from previous commands
* using the special INHERIT_ID (all ones).
*/
if ((sdd->sdt_flags & SDDF_SUPPRESS_UID) == 0) {
/*
* This command requires a user session.
*/
if (related && sr->smb_uid == INHERIT_ID &&
sr->uid_user != NULL) {
sr->smb_uid = sr->uid_user->u_uid;
} else {
ASSERT3P(sr->uid_user, ==, NULL);
sr->uid_user = smb_session_lookup_uid(session,
sr->smb_uid);
}
if (sr->uid_user == NULL) {
/* [MS-SMB2] 3.3.5.2.9 Verifying the Session */
smb2sr_put_error(sr, NT_STATUS_USER_SESSION_DELETED);
goto done;
}
sr->user_cr = smb_user_getcred(sr->uid_user);
}
if ((sdd->sdt_flags & SDDF_SUPPRESS_TID) == 0) {
/*
* This command requires a tree connection.
*/
if (related && sr->smb_tid == INHERIT_ID &&
sr->tid_tree != NULL) {
sr->smb_tid = sr->tid_tree->t_tid;
} else {
ASSERT3P(sr->tid_tree, ==, NULL);
sr->tid_tree = smb_session_lookup_tree(session,
sr->smb_tid);
}
if (sr->tid_tree == NULL) {
/* [MS-SMB2] 3.3.5.2.11 Verifying the Tree Connect */
smb2sr_put_error(sr, NT_STATUS_NETWORK_NAME_DELETED);
goto done;
}
}
/*
* The real work: call the SMB2 command handler.
*/
sr->sr_time_start = gethrtime();
if (async_func != NULL) {
rc = (*async_func)(sr);
} else {
/* NB: not using pre_op */
rc = (*sdd->sdt_function)(sr);
/* NB: not using post_op */
}
MBC_FLUSH(&sr->raw_data);
done:
/*
* Pad the reply to align(8) if necessary.
*/
if (sr->reply.chain_offset & 7) {
int padsz = 8 - (sr->reply.chain_offset & 7);
(void) smb_mbc_encodef(&sr->reply, "#.", padsz);
}
ASSERT((sr->reply.chain_offset & 7) == 0);
/*
* Record some statistics: latency, rx bytes, tx bytes
*/
smb_latency_add_sample(&sds->sdt_lat,
gethrtime() - sr->sr_time_start);
atomic_add_64(&sds->sdt_rxb,
(int64_t)(sr->command.chain_offset - sr->smb2_cmd_hdr));
atomic_add_64(&sds->sdt_txb,
(int64_t)(sr->reply.chain_offset - sr->smb2_reply_hdr));
return (rc);
}
