/*
* smb_query_pathname
*
* Determine the absolute pathname of 'node' within the share.
* For some levels (e.g. ALL_INFO) the pathname should include the
* sharename for others (e.g. NAME_INFO) the pathname should be
* relative to the share.
* For example if the node represents file "test1.txt" in directory
* "dir1" on share "share1"
* - if include_share is TRUE the pathname would be: \share1\dir1\test1.txt
* - if include_share is FALSE the pathname would be: \dir1\test1.txt
*
* If node represents a named stream, construct the pathname for the
* associated unnamed stream then append the stream name.
*/
static int
smb_query_pathname(smb_tree_t *tree, smb_node_t *node, boolean_t include_share,
char *buf, size_t buflen)
{
char *sharename = tree->t_sharename;
int rc;
size_t len;
vnode_t *vp;
if (include_share) {
len = snprintf(buf, buflen, "\\%s", sharename);
if (len == (buflen - 1))
return (ENAMETOOLONG);
buf += len;
buflen -= len;
}
if (SMB_IS_STREAM(node))
vp = node->n_unode->vp;
else
vp = node->vp;
rc = vnodetopath(tree->t_snode->vp, vp, buf, buflen, kcred);
if (rc == 0) {
(void) strsubst(buf, '/', '\\');
if (SMB_IS_STREAM(node))
(void) strlcat(buf, node->od_name, buflen);
}
return (rc);
}
/*
* 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_query_shortname
*
* If the node is a named stream, use its associated
* unnamed stream name to determine the shortname.
* If a shortname is required (smb_needs_mangle()), generate it
* using smb_mangle(), otherwise, convert the original name to
* upper-case and return it as the alternative name.
*/
static void
smb_query_shortname(smb_node_t *node, smb_queryinfo_t *qinfo)
{
char *namep;
if (SMB_IS_STREAM(node))
namep = node->n_unode->od_name;
else
namep = node->od_name;
if (smb_needs_mangled(namep)) {
smb_mangle(namep, qinfo->qi_attr.sa_vattr.va_nodeid,
qinfo->qi_shortname, SMB_SHORTNAMELEN);
} else {
(void) strlcpy(qinfo->qi_shortname, namep, SMB_SHORTNAMELEN);
(void) smb_strupr(qinfo->qi_shortname);
}
}
/*
* 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);
}
/*
* smb_encode_stream_info
*
* This function encodes the streams information.
* The following rules about how have been derived from observed NT
* behaviour.
*
* If the target is a file:
* 1. If there are no named streams, the response should still contain
* an entry for the unnamed stream.
* 2. If there are named streams, the response should contain an entry
* for the unnamed stream followed by the entries for the named
* streams.
*
* If the target is a directory:
* 1. If there are no streams, the response is complete. Directories
* do not report the unnamed stream.
* 2. If there are streams, the response should contain entries for
* those streams but there should not be an entry for the unnamed
* stream.
*
* Note that the stream name lengths exclude the null terminator but
* the field lengths (i.e. next offset calculations) need to include
* the null terminator and be padded to a multiple of 8 bytes. The
* last entry does not seem to need any padding.
*
* If an error is encountered when trying to read the stream entries
* (smb_odir_read_streaminfo) it is treated as if there are no [more]
* entries. The entries that have been read so far are returned and
* no error is reported.
*
* If the response buffer is not large enough to return all of the
* named stream entries, the entries that do fit are returned and
* a warning code is set (NT_STATUS_BUFFER_OVERFLOW). The next_offset
* value in the last returned entry must be 0.
*/
static void
smb_encode_stream_info(smb_request_t *sr, smb_xa_t *xa, smb_queryinfo_t *qinfo)
{
char *stream_name;
uint32_t next_offset;
uint32_t stream_nlen;
uint32_t pad;
u_offset_t datasz, allocsz;
boolean_t is_dir;
smb_streaminfo_t *sinfo, *sinfo_next;
int rc = 0;
boolean_t done = B_FALSE;
boolean_t eos = B_FALSE;
uint16_t odid;
smb_odir_t *od = NULL;
smb_node_t *fnode = qinfo->qi_node;
smb_attr_t *attr = &qinfo->qi_attr;
ASSERT(fnode);
if (SMB_IS_STREAM(fnode)) {
fnode = fnode->n_unode;
ASSERT(fnode);
}
ASSERT(fnode->n_magic == SMB_NODE_MAGIC);
ASSERT(fnode->n_state != SMB_NODE_STATE_DESTROYING);
sinfo = kmem_alloc(sizeof (smb_streaminfo_t), KM_SLEEP);
sinfo_next = kmem_alloc(sizeof (smb_streaminfo_t), KM_SLEEP);
is_dir = ((attr->sa_dosattr & FILE_ATTRIBUTE_DIRECTORY) != 0);
datasz = attr->sa_vattr.va_size;
allocsz = attr->sa_allocsz;
odid = smb_odir_openat(sr, fnode);
if (odid != 0)
od = smb_tree_lookup_odir(sr->tid_tree, odid);
if (od != NULL)
rc = smb_odir_read_streaminfo(sr, od, sinfo, &eos);
if ((od == NULL) || (rc != 0) || (eos))
done = B_TRUE;
/* If not a directory, encode an entry for the unnamed stream. */
if (!is_dir) {
stream_name = "::$DATA";
stream_nlen = smb_ascii_or_unicode_strlen(sr, stream_name);
next_offset = SMB_STREAM_ENCODE_FIXED_SZ + stream_nlen +
smb_ascii_or_unicode_null_len(sr);
/* Can unnamed stream fit in response buffer? */
if (MBC_ROOM_FOR(&xa->rep_data_mb, next_offset) == 0) {
done = B_TRUE;
smbsr_warn(sr, NT_STATUS_BUFFER_OVERFLOW,
ERRDOS, ERROR_MORE_DATA);
} else {
/* Can first named stream fit in rsp buffer? */
if (!done && !smb_stream_fits(sr, xa, sinfo->si_name,
next_offset)) {
done = B_TRUE;
smbsr_warn(sr, NT_STATUS_BUFFER_OVERFLOW,
ERRDOS, ERROR_MORE_DATA);
}
if (done)
next_offset = 0;
(void) smb_mbc_encodef(&xa->rep_data_mb, "%llqqu", sr,
next_offset, stream_nlen, datasz, allocsz,
stream_name);
}
}
/*
* If there is no next entry, or there is not enough space in
* the response buffer for the next entry, the next_offset and
* padding are 0.
*/
while (!done) {
stream_nlen = smb_ascii_or_unicode_strlen(sr, sinfo->si_name);
sinfo_next->si_name[0] = 0;
rc = smb_odir_read_streaminfo(sr, od, sinfo_next, &eos);
if ((rc != 0) || (eos)) {
done = B_TRUE;
} else {
next_offset = SMB_STREAM_ENCODE_FIXED_SZ +
stream_nlen +
smb_ascii_or_unicode_null_len(sr);
pad = smb_pad_align(next_offset, 8);
next_offset += pad;
/* Can next named stream fit in response buffer? */
if (!smb_stream_fits(sr, xa, sinfo_next->si_name,
next_offset)) {
done = B_TRUE;
smbsr_warn(sr, NT_STATUS_BUFFER_OVERFLOW,
ERRDOS, ERROR_MORE_DATA);
}
}
if (done) {
next_offset = 0;
pad = 0;
}
rc = smb_mbc_encodef(&xa->rep_data_mb, "%llqqu#.",
sr, next_offset, stream_nlen,
sinfo->si_size, sinfo->si_alloc_size,
sinfo->si_name, pad);
(void) memcpy(sinfo, sinfo_next, sizeof (smb_streaminfo_t));
}
kmem_free(sinfo, sizeof (smb_streaminfo_t));
kmem_free(sinfo_next, sizeof (smb_streaminfo_t));
if (od) {
smb_odir_close(od);
smb_odir_release(od);
}
}
/*
* smb_encode_stream_info
*
* This function encodes the streams information.
* The following rules about how have been derived from observed NT
* behaviour.
*
* If the target is a file:
* 1. If there are no named streams, the response should still contain
* an entry for the unnamed stream.
* 2. If there are named streams, the response should contain an entry
* for the unnamed stream followed by the entries for the named
* streams.
*
* If the target is a directory:
* 1. If there are no streams, the response is complete. Directories
* do not report the unnamed stream.
* 2. If there are streams, the response should contain entries for
* those streams but there should not be an entry for the unnamed
* stream.
*
* Note that the stream name lengths exclude the null terminator but
* the field lengths (i.e. next offset calculations) need to include
* the null terminator and be padded to a multiple of 8 bytes. The
* last entry does not seem to need any padding.
*
* If an error is encountered when trying to read the stream entries
* (smb_odir_read_streaminfo) it is treated as if there are no [more]
* entries. The entries that have been read so far are returned and
* no error is reported.
*
* Offset calculation:
* 2 dwords + 2 quadwords => 4 + 4 + 8 + 8 => 24
*/
static void
smb_encode_stream_info(smb_request_t *sr, smb_xa_t *xa, smb_queryinfo_t *qinfo)
{
char *stream_name;
uint32_t next_offset;
uint32_t stream_nlen;
uint32_t pad;
u_offset_t datasz, allocsz;
boolean_t is_dir;
smb_streaminfo_t *sinfo, *sinfo_next;
int rc = 0;
boolean_t done = B_FALSE;
boolean_t eos = B_FALSE;
uint16_t odid;
smb_odir_t *od = NULL;
smb_node_t *fnode = qinfo->qi_node;
smb_attr_t *attr = &qinfo->qi_attr;
ASSERT(fnode);
if (SMB_IS_STREAM(fnode)) {
fnode = fnode->n_unode;
ASSERT(fnode);
}
ASSERT(fnode->n_magic == SMB_NODE_MAGIC);
ASSERT(fnode->n_state != SMB_NODE_STATE_DESTROYING);
sinfo = kmem_alloc(sizeof (smb_streaminfo_t), KM_SLEEP);
sinfo_next = kmem_alloc(sizeof (smb_streaminfo_t), KM_SLEEP);
is_dir = (attr->sa_vattr.va_type == VDIR);
datasz = attr->sa_vattr.va_size;
allocsz = attr->sa_allocsz;
odid = smb_odir_openat(sr, fnode);
if (odid != 0)
od = smb_tree_lookup_odir(sr->tid_tree, odid);
if (od != NULL)
rc = smb_odir_read_streaminfo(sr, od, sinfo, &eos);
if ((od == NULL) || (rc != 0) || (eos))
done = B_TRUE;
/* If not a directory, encode an entry for the unnamed stream. */
if (!is_dir) {
stream_name = "::$DATA";
stream_nlen = smb_ascii_or_unicode_strlen(sr, stream_name);
if (done)
next_offset = 0;
else
next_offset = 24 + stream_nlen +
smb_ascii_or_unicode_null_len(sr);
(void) smb_mbc_encodef(&xa->rep_data_mb, "%llqqu", sr,
next_offset, stream_nlen, datasz, allocsz, stream_name);
}
/*
* Since last packet does not have a pad we need to check
* for the next stream before we encode the current one
*/
while (!done) {
stream_nlen = smb_ascii_or_unicode_strlen(sr, sinfo->si_name);
sinfo_next->si_name[0] = 0;
rc = smb_odir_read_streaminfo(sr, od, sinfo_next, &eos);
if ((rc != 0) || (eos)) {
done = B_TRUE;
next_offset = 0;
pad = 0;
} else {
next_offset = 24 + stream_nlen +
smb_ascii_or_unicode_null_len(sr);
pad = smb_pad_align(next_offset, 8);
next_offset += pad;
}
(void) smb_mbc_encodef(&xa->rep_data_mb, "%llqqu#.",
sr, next_offset, stream_nlen,
sinfo->si_size, sinfo->si_alloc_size,
sinfo->si_name, pad);
(void) memcpy(sinfo, sinfo_next, sizeof (smb_streaminfo_t));
}
kmem_free(sinfo, sizeof (smb_streaminfo_t));
kmem_free(sinfo_next, sizeof (smb_streaminfo_t));
if (od) {
smb_odir_close(od);
smb_odir_release(od);
}
}