Copyright (C) Andrew Tridgell 1992-1998
Copyright (C) Jeremy Allison 2001-2004
Copyright (C) Volker Lendecke 2005
-
+
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
-
+
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
-
+
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
+#include "system/filesys.h"
#include "printing.h"
+#include "smbd/smbd.h"
#include "smbd/globals.h"
#include "fake_file.h"
-#include "librpc/gen_ndr/messaging.h"
#include "../libcli/security/security.h"
#include "../librpc/gen_ndr/ndr_security.h"
+#include "../librpc/gen_ndr/open_files.h"
+#include "auth.h"
+#include "messages.h"
extern const struct generic_mapping file_generic_mapping;
};
/****************************************************************************
- SMB1 file varient of se_access_check. Never test FILE_READ_ATTRIBUTES.
+ If the requester wanted DELETE_ACCESS and was rejected because
+ the file ACL didn't include DELETE_ACCESS, see if the parent ACL
+ ovverrides this.
****************************************************************************/
-NTSTATUS smb1_file_se_access_check(struct connection_struct *conn,
- const struct security_descriptor *sd,
- const struct security_token *token,
- uint32_t access_desired,
- uint32_t *access_granted)
+static bool parent_override_delete(connection_struct *conn,
+ const struct smb_filename *smb_fname,
+ uint32_t access_mask,
+ uint32_t rejected_mask)
{
- *access_granted = 0;
-
- if (get_current_uid(conn) == (uid_t)0) {
- /* I'm sorry sir, I didn't know you were root... */
- *access_granted = access_desired;
- if (access_desired & SEC_FLAG_MAXIMUM_ALLOWED) {
- *access_granted |= FILE_GENERIC_ALL;
- }
- return NT_STATUS_OK;
+ if ((access_mask & DELETE_ACCESS) &&
+ (rejected_mask & DELETE_ACCESS) &&
+ can_delete_file_in_directory(conn, smb_fname)) {
+ return true;
}
-
- return se_access_check(sd,
- token,
- (access_desired & ~FILE_READ_ATTRIBUTES),
- access_granted);
+ return false;
}
/****************************************************************************
Check if we have open rights.
****************************************************************************/
-NTSTATUS smbd_check_open_rights(struct connection_struct *conn,
+NTSTATUS smbd_check_access_rights(struct connection_struct *conn,
const struct smb_filename *smb_fname,
- uint32_t access_mask,
- uint32_t *access_granted)
+ uint32_t access_mask)
{
/* Check if we have rights to open. */
NTSTATUS status;
struct security_descriptor *sd = NULL;
+ uint32_t rejected_share_access;
+ uint32_t rejected_mask = 0;
+
+ rejected_share_access = access_mask & ~(conn->share_access);
+
+ if (rejected_share_access) {
+ DEBUG(10, ("smbd_check_access_rights: rejected share access 0x%x "
+ "on %s (0x%x)\n",
+ (unsigned int)access_mask,
+ smb_fname_str_dbg(smb_fname),
+ (unsigned int)rejected_share_access ));
+ return NT_STATUS_ACCESS_DENIED;
+ }
+
+ if (get_current_uid(conn) == (uid_t)0) {
+ /* I'm sorry sir, I didn't know you were root... */
+ DEBUG(10,("smbd_check_access_rights: root override "
+ "on %s. Granting 0x%x\n",
+ smb_fname_str_dbg(smb_fname),
+ (unsigned int)access_mask ));
+ return NT_STATUS_OK;
+ }
+
+ if ((access_mask & DELETE_ACCESS) && !lp_acl_check_permissions(SNUM(conn))) {
+ DEBUG(10,("smbd_check_access_rights: not checking ACL "
+ "on DELETE_ACCESS on file %s. Granting 0x%x\n",
+ smb_fname_str_dbg(smb_fname),
+ (unsigned int)access_mask ));
+ return NT_STATUS_OK;
+ }
status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
(SECINFO_OWNER |
SECINFO_DACL),&sd);
if (!NT_STATUS_IS_OK(status)) {
- DEBUG(10, ("smbd_check_open_rights: Could not get acl "
+ DEBUG(10, ("smbd_check_access_rights: Could not get acl "
"on %s: %s\n",
smb_fname_str_dbg(smb_fname),
nt_errstr(status)));
return status;
}
- status = smb1_file_se_access_check(conn,
- sd,
+ /*
+ * Never test FILE_READ_ATTRIBUTES. se_access_check() also takes care of
+ * owner WRITE_DAC and READ_CONTROL.
+ */
+ status = se_access_check(sd,
get_current_nttok(conn),
- access_mask,
- access_granted);
+ (access_mask & ~FILE_READ_ATTRIBUTES),
+ &rejected_mask);
- DEBUG(10,("smbd_check_open_rights: file %s requesting "
+ DEBUG(10,("smbd_check_access_rights: file %s requesting "
"0x%x returning 0x%x (%s)\n",
smb_fname_str_dbg(smb_fname),
(unsigned int)access_mask,
- (unsigned int)*access_granted,
+ (unsigned int)rejected_mask,
nt_errstr(status) ));
if (!NT_STATUS_IS_OK(status)) {
if (DEBUGLEVEL >= 10) {
- DEBUG(10,("smbd_check_open_rights: acl for %s is:\n",
+ DEBUG(10,("smbd_check_access_rights: acl for %s is:\n",
smb_fname_str_dbg(smb_fname) ));
NDR_PRINT_DEBUG(security_descriptor, sd);
}
TALLOC_FREE(sd);
- return status;
+ if (NT_STATUS_IS_OK(status) ||
+ !NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
+ return status;
+ }
+
+ /* Here we know status == NT_STATUS_ACCESS_DENIED. */
+ if ((access_mask & FILE_WRITE_ATTRIBUTES) &&
+ (rejected_mask & FILE_WRITE_ATTRIBUTES) &&
+ (lp_map_readonly(SNUM(conn)) ||
+ lp_map_archive(SNUM(conn)) ||
+ lp_map_hidden(SNUM(conn)) ||
+ lp_map_system(SNUM(conn)))) {
+ rejected_mask &= ~FILE_WRITE_ATTRIBUTES;
+
+ DEBUG(10,("smbd_check_access_rights: "
+ "overrode "
+ "FILE_WRITE_ATTRIBUTES "
+ "on file %s\n",
+ smb_fname_str_dbg(smb_fname)));
+ }
+
+ if (parent_override_delete(conn,
+ smb_fname,
+ access_mask,
+ rejected_mask)) {
+ /* Were we trying to do an open
+ * for delete and didn't get DELETE
+ * access (only) ? Check if the
+ * directory allows DELETE_CHILD.
+ * See here:
+ * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
+ * for details. */
+
+ rejected_mask &= ~DELETE_ACCESS;
+
+ DEBUG(10,("smbd_check_access_rights: "
+ "overrode "
+ "DELETE_ACCESS on "
+ "file %s\n",
+ smb_fname_str_dbg(smb_fname)));
+ }
+
+ if (rejected_mask != 0) {
+ return NT_STATUS_ACCESS_DENIED;
+ } else {
+ return NT_STATUS_OK;
+ }
+}
+
+static NTSTATUS check_parent_access(struct connection_struct *conn,
+ struct smb_filename *smb_fname,
+ uint32_t access_mask,
+ char **pp_parent_dir)
+{
+ NTSTATUS status;
+ char *parent_dir = NULL;
+ struct security_descriptor *parent_sd = NULL;
+ uint32_t access_granted = 0;
+
+ if (!parent_dirname(talloc_tos(),
+ smb_fname->base_name,
+ &parent_dir,
+ NULL)) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ if (pp_parent_dir) {
+ *pp_parent_dir = parent_dir;
+ }
+
+ if (get_current_uid(conn) == (uid_t)0) {
+ /* I'm sorry sir, I didn't know you were root... */
+ DEBUG(10,("check_parent_access: root override "
+ "on %s. Granting 0x%x\n",
+ smb_fname_str_dbg(smb_fname),
+ (unsigned int)access_mask ));
+ return NT_STATUS_OK;
+ }
+
+ status = SMB_VFS_GET_NT_ACL(conn,
+ parent_dir,
+ SECINFO_DACL,
+ &parent_sd);
+
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(5,("check_parent_access: SMB_VFS_GET_NT_ACL failed for "
+ "%s with error %s\n",
+ parent_dir,
+ nt_errstr(status)));
+ return status;
+ }
+
+ /*
+ * Never test FILE_READ_ATTRIBUTES. se_access_check() also takes care of
+ * owner WRITE_DAC and READ_CONTROL.
+ */
+ status = se_access_check(parent_sd,
+ get_current_nttok(conn),
+ (access_mask & ~FILE_READ_ATTRIBUTES),
+ &access_granted);
+ if(!NT_STATUS_IS_OK(status)) {
+ DEBUG(5,("check_parent_access: access check "
+ "on directory %s for "
+ "path %s for mask 0x%x returned (0x%x) %s\n",
+ parent_dir,
+ smb_fname->base_name,
+ access_mask,
+ access_granted,
+ nt_errstr(status) ));
+ return status;
+ }
+
+ return NT_STATUS_OK;
}
/****************************************************************************
"directory %s. Error was %s\n",
smb_fname_str_dbg(smb_fname_parent),
strerror(errno)));
+ TALLOC_FREE(smb_fname_parent);
+ return;
+ }
+
+ if (smb_fname_parent->st.st_ex_uid == fsp->fsp_name->st.st_ex_uid) {
+ /* Already this uid - no need to change. */
+ DEBUG(10,("change_file_owner_to_parent: file %s "
+ "is already owned by uid %d\n",
+ fsp_str_dbg(fsp),
+ (int)fsp->fsp_name->st.st_ex_uid ));
+ TALLOC_FREE(smb_fname_parent);
return;
}
"was %s\n", fsp_str_dbg(fsp),
(unsigned int)smb_fname_parent->st.st_ex_uid,
strerror(errno) ));
+ } else {
+ DEBUG(10,("change_file_owner_to_parent: changed new file %s to "
+ "parent directory uid %u.\n", fsp_str_dbg(fsp),
+ (unsigned int)smb_fname_parent->st.st_ex_uid));
+ /* Ensure the uid entry is updated. */
+ fsp->fsp_name->st.st_ex_uid = smb_fname_parent->st.st_ex_uid;
}
- DEBUG(10,("change_file_owner_to_parent: changed new file %s to "
- "parent directory uid %u.\n", fsp_str_dbg(fsp),
- (unsigned int)smb_fname_parent->st.st_ex_uid));
-
TALLOC_FREE(smb_fname_parent);
}
/* Ensure we're pointing at the same place. */
if (smb_fname_cwd->st.st_ex_dev != psbuf->st_ex_dev ||
- smb_fname_cwd->st.st_ex_ino != psbuf->st_ex_ino ||
- smb_fname_cwd->st.st_ex_mode != psbuf->st_ex_mode ) {
+ smb_fname_cwd->st.st_ex_ino != psbuf->st_ex_ino) {
DEBUG(0,("change_dir_owner_to_parent: "
- "device/inode/mode on directory %s changed. "
+ "device/inode on directory %s changed. "
"Refusing to chown !\n", fname ));
status = NT_STATUS_ACCESS_DENIED;
goto chdir;
}
+ if (smb_fname_parent->st.st_ex_uid == smb_fname_cwd->st.st_ex_uid) {
+ /* Already this uid - no need to change. */
+ DEBUG(10,("change_dir_owner_to_parent: directory %s "
+ "is already owned by uid %d\n",
+ fname,
+ (int)smb_fname_cwd->st.st_ex_uid ));
+ status = NT_STATUS_OK;
+ goto chdir;
+ }
+
become_root();
- ret = SMB_VFS_CHOWN(conn, ".", smb_fname_parent->st.st_ex_uid,
+ ret = SMB_VFS_LCHOWN(conn, ".", smb_fname_parent->st.st_ex_uid,
(gid_t)-1);
unbecome_root();
if (ret == -1) {
"Error was %s\n", fname,
(unsigned int)smb_fname_parent->st.st_ex_uid,
strerror(errno) ));
- goto chdir;
+ } else {
+ DEBUG(10,("change_dir_owner_to_parent: changed ownership of new "
+ "directory %s to parent directory uid %u.\n",
+ fname, (unsigned int)smb_fname_parent->st.st_ex_uid ));
+ /* Ensure the uid entry is updated. */
+ psbuf->st_ex_uid = smb_fname_parent->st.st_ex_uid;
}
- DEBUG(10,("change_dir_owner_to_parent: changed ownership of new "
- "directory %s to parent directory uid %u.\n",
- fname, (unsigned int)smb_fname_parent->st.st_ex_uid ));
-
chdir:
vfs_ChDir(conn,saved_dir);
out:
int accmode = (flags & O_ACCMODE);
int local_flags = flags;
bool file_existed = VALID_STAT(fsp->fsp_name->st);
+ bool file_created = false;
fsp->fh->fd = -1;
errno = EPERM;
return NT_STATUS_OBJECT_NAME_INVALID;
}
+ /* Can we access this file ? */
+ if (!fsp->base_fsp) {
+ /* Only do this check on non-stream open. */
+ if (file_existed) {
+ status = smbd_check_access_rights(conn,
+ smb_fname,
+ access_mask);
+ } else if (local_flags & O_CREAT){
+ status = check_parent_access(conn,
+ smb_fname,
+ SEC_DIR_ADD_FILE,
+ NULL);
+ } else {
+ /* File didn't exist and no O_CREAT. */
+ return NT_STATUS_OBJECT_NAME_NOT_FOUND;
+ }
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(10,("open_file: "
+ "%s on file "
+ "%s returned %s\n",
+ file_existed ?
+ "smbd_check_access_rights" :
+ "check_parent_access",
+ smb_fname_str_dbg(smb_fname),
+ nt_errstr(status) ));
+ return status;
+ }
+ }
+
/* Actually do the open */
status = fd_open(conn, fsp, local_flags, unx_mode);
if (!NT_STATUS_IS_OK(status)) {
}
if ((local_flags & O_CREAT) && !file_existed) {
-
- /* Inherit the ACL if required */
- if (lp_inherit_perms(SNUM(conn))) {
- inherit_access_posix_acl(conn, parent_dir,
- smb_fname->base_name,
- unx_mode);
- }
-
- /* Change the owner if required. */
- if (lp_inherit_owner(SNUM(conn))) {
- change_file_owner_to_parent(conn, parent_dir,
- fsp);
- }
-
- notify_fname(conn, NOTIFY_ACTION_ADDED,
- FILE_NOTIFY_CHANGE_FILE_NAME,
- smb_fname->base_name);
+ file_created = true;
}
} else {
fsp->fh->fd = -1; /* What we used to call a stat open. */
- if (file_existed) {
- uint32_t access_granted = 0;
+ if (!file_existed) {
+ /* File must exist for a stat open. */
+ return NT_STATUS_OBJECT_NAME_NOT_FOUND;
+ }
- status = smbd_check_open_rights(conn,
- smb_fname,
- access_mask,
- &access_granted);
- if (!NT_STATUS_IS_OK(status)) {
- if (NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
- /*
- * On NT_STATUS_ACCESS_DENIED, access_granted
- * contains the denied bits.
- */
-
- if ((access_mask & FILE_WRITE_ATTRIBUTES) &&
- (access_granted & FILE_WRITE_ATTRIBUTES) &&
- (lp_map_readonly(SNUM(conn)) ||
- lp_map_archive(SNUM(conn)) ||
- lp_map_hidden(SNUM(conn)) ||
- lp_map_system(SNUM(conn)))) {
- access_granted &= ~FILE_WRITE_ATTRIBUTES;
-
- DEBUG(10,("open_file: "
- "overrode "
- "FILE_WRITE_"
- "ATTRIBUTES "
- "on file %s\n",
- smb_fname_str_dbg(
- smb_fname)));
- }
+ status = smbd_check_access_rights(conn,
+ smb_fname,
+ access_mask);
- if ((access_mask & DELETE_ACCESS) &&
- (access_granted & DELETE_ACCESS) &&
- can_delete_file_in_directory(conn,
- smb_fname)) {
- /* Were we trying to do a stat open
- * for delete and didn't get DELETE
- * access (only) ? Check if the
- * directory allows DELETE_CHILD.
- * See here:
- * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
- * for details. */
-
- access_granted &= ~DELETE_ACCESS;
-
- DEBUG(10,("open_file: "
- "overrode "
- "DELETE_ACCESS on "
- "file %s\n",
- smb_fname_str_dbg(
- smb_fname)));
- }
+ if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND) &&
+ fsp->posix_open &&
+ S_ISLNK(smb_fname->st.st_ex_mode)) {
+ /* This is a POSIX stat open for delete
+ * or rename on a symlink that points
+ * nowhere. Allow. */
+ DEBUG(10,("open_file: allowing POSIX "
+ "open on bad symlink %s\n",
+ smb_fname_str_dbg(smb_fname)));
+ status = NT_STATUS_OK;
+ }
- if (access_granted != 0) {
- DEBUG(10,("open_file: Access "
- "denied on file "
- "%s\n",
- smb_fname_str_dbg(
- smb_fname)));
- return status;
- }
- } else if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND) &&
- fsp->posix_open &&
- S_ISLNK(smb_fname->st.st_ex_mode)) {
- /* This is a POSIX stat open for delete
- * or rename on a symlink that points
- * nowhere. Allow. */
- DEBUG(10,("open_file: allowing POSIX "
- "open on bad symlink %s\n",
- smb_fname_str_dbg(
- smb_fname)));
- } else {
- DEBUG(10,("open_file: "
- "smbd_check_open_rights on file "
- "%s returned %s\n",
- smb_fname_str_dbg(smb_fname),
- nt_errstr(status) ));
- return status;
- }
- }
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(10,("open_file: "
+ "smbd_check_access_rights on file "
+ "%s returned %s\n",
+ smb_fname_str_dbg(smb_fname),
+ nt_errstr(status) ));
+ return status;
}
}
fd_close(fsp);
return status;
}
+
+ if (file_created) {
+ bool need_re_stat = false;
+ /* Do all inheritance work after we've
+ done a successful stat call and filled
+ in the stat struct in fsp->fsp_name. */
+
+ /* Inherit the ACL if required */
+ if (lp_inherit_perms(SNUM(conn))) {
+ inherit_access_posix_acl(conn, parent_dir,
+ smb_fname->base_name,
+ unx_mode);
+ need_re_stat = true;
+ }
+
+ /* Change the owner if required. */
+ if (lp_inherit_owner(SNUM(conn))) {
+ change_file_owner_to_parent(conn, parent_dir,
+ fsp);
+ need_re_stat = true;
+ }
+
+ if (need_re_stat) {
+ if (fsp->fh->fd == -1) {
+ ret = SMB_VFS_STAT(conn, smb_fname);
+ } else {
+ ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
+ /* If we have an fd, this stat should succeed. */
+ if (ret == -1) {
+ DEBUG(0,("Error doing fstat on open file %s "
+ "(%s)\n",
+ smb_fname_str_dbg(smb_fname),
+ strerror(errno) ));
+ }
+ }
+ }
+
+ notify_fname(conn, NOTIFY_ACTION_ADDED,
+ FILE_NOTIFY_CHANGE_FILE_NAME,
+ smb_fname->base_name);
+ }
}
/*
fsp->wcp = NULL; /* Write cache pointer. */
DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
- conn->session_info->unix_name,
+ conn->session_info->unix_info->unix_name,
smb_fname_str_dbg(smb_fname),
BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
conn->num_files_open));
return NT_STATUS_OK;
}
-/*******************************************************************
- Return True if the filename is one of the special executable types.
-********************************************************************/
-
-bool is_executable(const char *fname)
-{
- if ((fname = strrchr_m(fname,'.'))) {
- if (strequal(fname,".com") ||
- strequal(fname,".dll") ||
- strequal(fname,".exe") ||
- strequal(fname,".sym")) {
- return True;
- }
- }
- return False;
-}
-
/****************************************************************************
Check if we can open a file with a share mode.
Returns True if conflict, False if not.
share_access, FILE_SHARE_WRITE);
CHECK_MASK(2, access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
entry->share_access, FILE_SHARE_WRITE);
-
+
CHECK_MASK(3, entry->access_mask, FILE_READ_DATA | FILE_EXECUTE,
share_access, FILE_SHARE_READ);
CHECK_MASK(4, access_mask, FILE_READ_DATA | FILE_EXECUTE,
}
if (is_deferred_open_entry(share_entry) &&
- !open_was_deferred(share_entry->op_mid)) {
+ !open_was_deferred(sconn, share_entry->op_mid)) {
char *str = talloc_asprintf(talloc_tos(),
"Got a deferred entry without a request: "
"PANIC: %s\n",
/*
* Check if the share modes will give us access.
*/
-
+
#if defined(DEVELOPER)
for(i = 0; i < lck->num_share_modes; i++) {
validate_my_share_entries(conn->sconn, i,
return NT_STATUS_SHARING_VIOLATION;
}
}
-
+
return NT_STATUS_OK;
}
* Do internal consistency checks on the share mode for a file.
*/
-static void find_oplock_types(struct share_mode_lock *lck,
+static void find_oplock_types(files_struct *fsp,
+ int oplock_request,
+ struct share_mode_lock *lck,
struct share_mode_entry **pp_batch,
struct share_mode_entry **pp_ex_or_batch,
bool *got_level2,
*got_level2 = false;
*got_no_oplock = false;
+ /* Ignore stat or internal opens, as is done in
+ delay_for_batch_oplocks() and
+ delay_for_exclusive_oplocks().
+ */
+ if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
+ return;
+ }
+
for (i=0; i<lck->num_share_modes; i++) {
if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
continue;
}
+ if (lck->share_modes[i].op_type == NO_OPLOCK &&
+ is_stat_open(lck->share_modes[i].access_mask)) {
+ /* We ignore stat opens in the table - they
+ always have NO_OPLOCK and never get or
+ cause breaks. JRA. */
+ continue;
+ }
+
if (BATCH_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
/* batch - can only be one. */
- if (*pp_batch || *got_level2 || *got_no_oplock) {
+ if (*pp_ex_or_batch || *pp_batch || *got_level2 || *got_no_oplock) {
smb_panic("Bad batch oplock entry.");
}
*pp_batch = &lck->share_modes[i];
return false;
}
-static bool file_has_brlocks(files_struct *fsp)
-{
- struct byte_range_lock *br_lck;
-
- br_lck = brl_get_locks_readonly(fsp);
- if (!br_lck)
- return false;
-
- return br_lck->num_locks > 0 ? true : false;
-}
-
static void grant_fsp_oplock_type(files_struct *fsp,
+ const struct byte_range_lock *br_lck,
int oplock_request,
bool got_level2_oplock,
bool got_a_none_oplock)
DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
fsp->oplock_type, fsp_str_dbg(fsp)));
return;
- } else if (lp_locking(fsp->conn->params) && file_has_brlocks(fsp)) {
+ } else if (br_lck && br_lck->num_locks > 0) {
DEBUG(10,("grant_fsp_oplock_type: file %s has byte range locks\n",
fsp_str_dbg(fsp)));
fsp->oplock_type = NO_OPLOCK;
create_options, fsp_to_dup_into);
}
-/****************************************************************************
- Open a file with a share mode - old openX method - map into NTCreate.
-****************************************************************************/
-
-bool map_open_params_to_ntcreate(const struct smb_filename *smb_fname,
- int deny_mode, int open_func,
- uint32 *paccess_mask,
- uint32 *pshare_mode,
- uint32 *pcreate_disposition,
- uint32 *pcreate_options,
- uint32_t *pprivate_flags)
-{
- uint32 access_mask;
- uint32 share_mode;
- uint32 create_disposition;
- uint32 create_options = FILE_NON_DIRECTORY_FILE;
- uint32_t private_flags = 0;
-
- DEBUG(10,("map_open_params_to_ntcreate: fname = %s, deny_mode = 0x%x, "
- "open_func = 0x%x\n",
- smb_fname_str_dbg(smb_fname), (unsigned int)deny_mode,
- (unsigned int)open_func ));
-
- /* Create the NT compatible access_mask. */
- switch (GET_OPENX_MODE(deny_mode)) {
- case DOS_OPEN_EXEC: /* Implies read-only - used to be FILE_READ_DATA */
- case DOS_OPEN_RDONLY:
- access_mask = FILE_GENERIC_READ;
- break;
- case DOS_OPEN_WRONLY:
- access_mask = FILE_GENERIC_WRITE;
- break;
- case DOS_OPEN_RDWR:
- case DOS_OPEN_FCB:
- access_mask = FILE_GENERIC_READ|FILE_GENERIC_WRITE;
- break;
- default:
- DEBUG(10,("map_open_params_to_ntcreate: bad open mode = 0x%x\n",
- (unsigned int)GET_OPENX_MODE(deny_mode)));
- return False;
- }
-
- /* Create the NT compatible create_disposition. */
- switch (open_func) {
- case OPENX_FILE_EXISTS_FAIL|OPENX_FILE_CREATE_IF_NOT_EXIST:
- create_disposition = FILE_CREATE;
- break;
-
- case OPENX_FILE_EXISTS_OPEN:
- create_disposition = FILE_OPEN;
- break;
-
- case OPENX_FILE_EXISTS_OPEN|OPENX_FILE_CREATE_IF_NOT_EXIST:
- create_disposition = FILE_OPEN_IF;
- break;
-
- case OPENX_FILE_EXISTS_TRUNCATE:
- create_disposition = FILE_OVERWRITE;
- break;
-
- case OPENX_FILE_EXISTS_TRUNCATE|OPENX_FILE_CREATE_IF_NOT_EXIST:
- create_disposition = FILE_OVERWRITE_IF;
- break;
-
- default:
- /* From samba4 - to be confirmed. */
- if (GET_OPENX_MODE(deny_mode) == DOS_OPEN_EXEC) {
- create_disposition = FILE_CREATE;
- break;
- }
- DEBUG(10,("map_open_params_to_ntcreate: bad "
- "open_func 0x%x\n", (unsigned int)open_func));
- return False;
- }
-
- /* Create the NT compatible share modes. */
- switch (GET_DENY_MODE(deny_mode)) {
- case DENY_ALL:
- share_mode = FILE_SHARE_NONE;
- break;
-
- case DENY_WRITE:
- share_mode = FILE_SHARE_READ;
- break;
-
- case DENY_READ:
- share_mode = FILE_SHARE_WRITE;
- break;
-
- case DENY_NONE:
- share_mode = FILE_SHARE_READ|FILE_SHARE_WRITE;
- break;
-
- case DENY_DOS:
- private_flags |= NTCREATEX_OPTIONS_PRIVATE_DENY_DOS;
- if (is_executable(smb_fname->base_name)) {
- share_mode = FILE_SHARE_READ|FILE_SHARE_WRITE;
- } else {
- if (GET_OPENX_MODE(deny_mode) == DOS_OPEN_RDONLY) {
- share_mode = FILE_SHARE_READ;
- } else {
- share_mode = FILE_SHARE_NONE;
- }
- }
- break;
-
- case DENY_FCB:
- private_flags |= NTCREATEX_OPTIONS_PRIVATE_DENY_FCB;
- share_mode = FILE_SHARE_NONE;
- break;
-
- default:
- DEBUG(10,("map_open_params_to_ntcreate: bad deny_mode 0x%x\n",
- (unsigned int)GET_DENY_MODE(deny_mode) ));
- return False;
- }
-
- DEBUG(10,("map_open_params_to_ntcreate: file %s, access_mask = 0x%x, "
- "share_mode = 0x%x, create_disposition = 0x%x, "
- "create_options = 0x%x private_flags = 0x%x\n",
- smb_fname_str_dbg(smb_fname),
- (unsigned int)access_mask,
- (unsigned int)share_mode,
- (unsigned int)create_disposition,
- (unsigned int)create_options,
- (unsigned int)private_flags));
-
- if (paccess_mask) {
- *paccess_mask = access_mask;
- }
- if (pshare_mode) {
- *pshare_mode = share_mode;
- }
- if (pcreate_disposition) {
- *pcreate_disposition = create_disposition;
- }
- if (pcreate_options) {
- *pcreate_options = create_options;
- }
- if (pprivate_flags) {
- *pprivate_flags = private_flags;
- }
-
- return True;
-
-}
-
static void schedule_defer_open(struct share_mode_lock *lck,
struct timeval request_time,
struct smb_request *req)
Work out what access_mask to use from what the client sent us.
****************************************************************************/
-static NTSTATUS calculate_access_mask(connection_struct *conn,
- const struct smb_filename *smb_fname,
- bool file_existed,
- uint32_t access_mask,
- uint32_t *access_mask_out)
+NTSTATUS smbd_calculate_access_mask(connection_struct *conn,
+ const struct smb_filename *smb_fname,
+ bool file_existed,
+ uint32_t access_mask,
+ uint32_t *access_mask_out)
{
NTSTATUS status;
+ uint32_t orig_access_mask = access_mask;
+ uint32_t rejected_share_access;
/*
* Convert GENERIC bits to specific bits.
/* Calculate MAXIMUM_ALLOWED_ACCESS if requested. */
if (access_mask & MAXIMUM_ALLOWED_ACCESS) {
- if (file_existed) {
+ if (get_current_uid(conn) == (uid_t)0) {
+ access_mask |= FILE_GENERIC_ALL;
+ } else if (file_existed) {
struct security_descriptor *sd;
uint32_t access_granted = 0;
SECINFO_DACL),&sd);
if (!NT_STATUS_IS_OK(status)) {
- DEBUG(10, ("calculate_access_mask: Could not get acl "
- "on file %s: %s\n",
+ DEBUG(10,("smbd_calculate_access_mask: "
+ "Could not get acl on file %s: %s\n",
smb_fname_str_dbg(smb_fname),
nt_errstr(status)));
return NT_STATUS_ACCESS_DENIED;
}
- status = smb1_file_se_access_check(conn,
- sd,
+ /*
+ * Never test FILE_READ_ATTRIBUTES. se_access_check()
+ * also takes care of owner WRITE_DAC and READ_CONTROL.
+ */
+ status = se_access_check(sd,
get_current_nttok(conn),
- access_mask,
+ (access_mask & ~FILE_READ_ATTRIBUTES),
&access_granted);
TALLOC_FREE(sd);
if (!NT_STATUS_IS_OK(status)) {
- DEBUG(10, ("calculate_access_mask: Access denied on "
- "file %s: when calculating maximum access\n",
+ DEBUG(10, ("smbd_calculate_access_mask: "
+ "Access denied on file %s: "
+ "when calculating maximum access\n",
smb_fname_str_dbg(smb_fname)));
return NT_STATUS_ACCESS_DENIED;
}
- access_mask = access_granted;
+ access_mask = (access_granted | FILE_READ_ATTRIBUTES);
} else {
access_mask = FILE_GENERIC_ALL;
}
+
+ access_mask &= conn->share_access;
+ }
+
+ rejected_share_access = access_mask & ~(conn->share_access);
+
+ if (rejected_share_access) {
+ DEBUG(10, ("smbd_calculate_access_mask: Access denied on "
+ "file %s: rejected by share access mask[0x%08X] "
+ "orig[0x%08X] mapped[0x%08X] reject[0x%08X]\n",
+ smb_fname_str_dbg(smb_fname),
+ conn->share_access,
+ orig_access_mask, access_mask,
+ rejected_share_access));
+ return NT_STATUS_ACCESS_DENIED;
}
*access_mask_out = access_mask;
NULL, NULL, NULL);
if (lck == NULL) {
DEBUG(0, ("could not get share mode lock\n"));
- } else {
- del_deferred_open_entry(lck, mid, pid);
- TALLOC_FREE(lck);
+ return;
}
+ del_deferred_open_entry(lck, mid, pid);
+ TALLOC_FREE(lck);
+}
+
+/****************************************************************
+ Ensure we get the brlock lock followed by the share mode lock
+ in the correct order to prevent deadlocks if other smbd's are
+ using the brlock database on this file simultaneously with this open
+ (that code also gets the locks in brlock -> share mode lock order).
+****************************************************************/
+
+static bool acquire_ordered_locks(TALLOC_CTX *mem_ctx,
+ files_struct *fsp,
+ const struct file_id id,
+ const char *connectpath,
+ const struct smb_filename *smb_fname,
+ const struct timespec *p_old_write_time,
+ struct share_mode_lock **p_lck,
+ struct byte_range_lock **p_br_lck)
+{
+ /* Ordering - we must get the br_lck for this
+ file before the share mode. */
+ if (lp_locking(fsp->conn->params)) {
+ *p_br_lck = brl_get_locks_readonly(fsp);
+ if (*p_br_lck == NULL) {
+ DEBUG(0, ("Could not get br_lock\n"));
+ return false;
+ }
+ /* Note - we don't need to free the returned
+ br_lck explicitly as it was allocated on talloc_tos()
+ and so will be autofreed (and release the lock)
+ once the frame context disappears.
+
+ If it was set to fsp->brlock_rec then it was
+ talloc_move'd to hang off the fsp pointer and
+ in this case is guarenteed to not be holding the
+ lock on the brlock database. */
+ }
+
+ *p_lck = get_share_mode_lock(mem_ctx,
+ id,
+ connectpath,
+ smb_fname,
+ p_old_write_time);
+
+ if (*p_lck == NULL) {
+ DEBUG(0, ("Could not get share mode lock\n"));
+ TALLOC_FREE(*p_br_lck);
+ return false;
+ }
+ return true;
}
/****************************************************************************
ZERO_STRUCT(id);
- /* Windows allows a new file to be created and
- silently removes a FILE_ATTRIBUTE_DIRECTORY
- sent by the client. Do the same. */
-
- new_dos_attributes &= ~FILE_ATTRIBUTE_DIRECTORY;
-
if (conn->printer) {
/*
* Printers are handled completely differently.
unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
new_dos_attributes = 0;
} else {
- /* We add aARCH to this as this mode is only used if the file is
+ /* Windows allows a new file to be created and
+ silently removes a FILE_ATTRIBUTE_DIRECTORY
+ sent by the client. Do the same. */
+
+ new_dos_attributes &= ~FILE_ATTRIBUTE_DIRECTORY;
+
+ /* We add FILE_ATTRIBUTE_ARCHIVE to this as this mode is only used if the file is
* created new. */
- unx_mode = unix_mode(conn, new_dos_attributes | aARCH,
+ unx_mode = unix_mode(conn, new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
smb_fname, parent_dir);
}
sconn_server_id(req->sconn));
/* Ensure we don't reprocess this message. */
- remove_deferred_open_message_smb(req->mid);
+ remove_deferred_open_message_smb(req->sconn, req->mid);
}
}
}
}
- status = calculate_access_mask(conn, smb_fname, file_existed,
+ status = smbd_calculate_access_mask(conn, smb_fname, file_existed,
access_mask,
&access_mask);
if (!NT_STATUS_IS_OK(status)) {
- DEBUG(10, ("open_file_ntcreate: calculate_access_mask "
+ DEBUG(10, ("open_file_ntcreate: smbd_calculate_access_mask "
"on file %s returned %s\n",
smb_fname_str_dbg(smb_fname), nt_errstr(status)));
return status;
}
if (file_existed) {
+ struct byte_range_lock *br_lck = NULL;
struct share_mode_entry *batch_entry = NULL;
struct share_mode_entry *exclusive_entry = NULL;
bool got_level2_oplock = false;
struct timespec old_write_time = smb_fname->st.st_ex_mtime;
id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
- lck = get_share_mode_lock(talloc_tos(), id,
- conn->connectpath,
- smb_fname, &old_write_time);
-
- if (lck == NULL) {
- DEBUG(0, ("Could not get share mode lock\n"));
+ if (!acquire_ordered_locks(talloc_tos(),
+ fsp,
+ id,
+ conn->connectpath,
+ smb_fname,
+ &old_write_time,
+ &lck,
+ &br_lck)) {
return NT_STATUS_SHARING_VIOLATION;
}
/* Get the types we need to examine. */
- find_oplock_types(lck,
+ find_oplock_types(fsp,
+ oplock_request,
+ lck,
&batch_entry,
&exclusive_entry,
&got_level2_oplock,
}
grant_fsp_oplock_type(fsp,
+ br_lck,
oplock_request,
got_level2_oplock,
got_a_none_oplock);
if (((can_access_mask & FILE_WRITE_DATA) &&
!CAN_WRITE(conn)) ||
- !can_access_file_data(conn, smb_fname,
- can_access_mask)) {
+ !NT_STATUS_IS_OK(smbd_check_access_rights(conn,
+ smb_fname, can_access_mask))) {
can_access = False;
}
open_access_mask);
if (!NT_STATUS_IS_OK(fsp_open)) {
- if (lck != NULL) {
- TALLOC_FREE(lck);
- }
+ TALLOC_FREE(lck);
return fsp_open;
}
if (!file_existed) {
+ struct byte_range_lock *br_lck = NULL;
struct share_mode_entry *batch_entry = NULL;
struct share_mode_entry *exclusive_entry = NULL;
bool got_level2_oplock = false;
id = fsp->file_id;
- lck = get_share_mode_lock(talloc_tos(), id,
- conn->connectpath,
- smb_fname, &old_write_time);
-
- if (lck == NULL) {
- DEBUG(0, ("open_file_ntcreate: Could not get share "
- "mode lock for %s\n",
- smb_fname_str_dbg(smb_fname)));
- fd_close(fsp);
+ if (!acquire_ordered_locks(talloc_tos(),
+ fsp,
+ id,
+ conn->connectpath,
+ smb_fname,
+ &old_write_time,
+ &lck,
+ &br_lck)) {
return NT_STATUS_SHARING_VIOLATION;
}
/* Get the types we need to examine. */
- find_oplock_types(lck,
+ find_oplock_types(fsp,
+ oplock_request,
+ lck,
&batch_entry,
&exclusive_entry,
&got_level2_oplock,
if (!NT_STATUS_IS_OK(status)) {
struct deferred_open_record state;
- fd_close(fsp);
-
state.delayed_for_oplocks = False;
state.id = id;
req, &state);
}
TALLOC_FREE(lck);
+ fd_close(fsp);
return status;
}
grant_fsp_oplock_type(fsp,
+ br_lck,
oplock_request,
got_level2_oplock,
got_a_none_oplock);
/*
* According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
+ * but we don't have to store this - just ignore it on access check.
*/
- fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
+ if (conn->sconn->using_smb2) {
+ /*
+ * SMB2 doesn't return it (according to Microsoft tests).
+ * Test Case: TestSuite_ScenarioNo009GrantedAccessTestS0
+ * File created with access = 0x7 (Read, Write, Delete)
+ * Query Info on file returns 0x87 (Read, Write, Delete, Read Attributes)
+ */
+ fsp->access_mask = access_mask;
+ } else {
+ /* But SMB1 does. */
+ fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
+ }
if (file_existed) {
/* stat opens on existing files don't get oplocks. */
new_file_created = True;
}
- set_share_mode(lck, fsp, get_current_uid(conn), 0,
+ set_share_mode(lck, fsp, get_current_uid(conn),
+ req ? req->mid : 0,
fsp->oplock_type);
/* Handle strange delete on close create semantics. */
lp_store_dos_attributes(SNUM(conn))) {
if (!posix_open) {
if (file_set_dosmode(conn, smb_fname,
- new_dos_attributes | aARCH,
+ new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
parent_dir, true) == 0) {
unx_mode = smb_fname->st.st_ex_mode;
}
uint32 file_attributes)
{
mode_t mode;
- char *parent_dir;
+ char *parent_dir = NULL;
NTSTATUS status;
bool posix_open = false;
+ bool need_re_stat = false;
+ uint32_t access_mask = SEC_DIR_ADD_SUBDIR;
- if(!CAN_WRITE(conn)) {
- DEBUG(5,("mkdir_internal: failing create on read-only share "
+ if(access_mask & ~(conn->share_access)) {
+ DEBUG(5,("mkdir_internal: failing share access "
"%s\n", lp_servicename(SNUM(conn))));
return NT_STATUS_ACCESS_DENIED;
}
posix_open = true;
mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
} else {
- mode = unix_mode(conn, aDIR, smb_dname, parent_dir);
+ mode = unix_mode(conn, FILE_ATTRIBUTE_DIRECTORY, smb_dname, parent_dir);
+ }
+
+ status = check_parent_access(conn,
+ smb_dname,
+ access_mask,
+ &parent_dir);
+ if(!NT_STATUS_IS_OK(status)) {
+ DEBUG(5,("mkdir_internal: check_parent_access "
+ "on directory %s for path %s returned %s\n",
+ parent_dir,
+ smb_dname->base_name,
+ nt_errstr(status) ));
+ return status;
}
if (SMB_VFS_MKDIR(conn, smb_dname->base_name, mode) != 0) {
}
if (!S_ISDIR(smb_dname->st.st_ex_mode)) {
- DEBUG(0, ("Directory just '%s' created is not a directory\n",
+ DEBUG(0, ("Directory '%s' just created is not a directory !\n",
smb_fname_str_dbg(smb_dname)));
- return NT_STATUS_ACCESS_DENIED;
+ return NT_STATUS_NOT_A_DIRECTORY;
}
if (lp_store_dos_attributes(SNUM(conn))) {
if (!posix_open) {
file_set_dosmode(conn, smb_dname,
- file_attributes | aDIR,
+ file_attributes | FILE_ATTRIBUTE_DIRECTORY,
parent_dir, true);
}
}
if (lp_inherit_perms(SNUM(conn))) {
inherit_access_posix_acl(conn, parent_dir,
smb_dname->base_name, mode);
+ need_re_stat = true;
}
if (!posix_open) {
SMB_VFS_CHMOD(conn, smb_dname->base_name,
(smb_dname->st.st_ex_mode |
(mode & ~smb_dname->st.st_ex_mode)));
+ need_re_stat = true;
}
}
change_dir_owner_to_parent(conn, parent_dir,
smb_dname->base_name,
&smb_dname->st);
+ need_re_stat = true;
+ }
+
+ if (need_re_stat) {
+ if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
+ DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
+ smb_fname_str_dbg(smb_dname), strerror(errno)));
+ return map_nt_error_from_unix(errno);
+ }
}
notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
Ensure we didn't get symlink raced on opening a directory.
****************************************************************************/
-static bool check_same_stat(const SMB_STRUCT_STAT *sbuf1,
+bool check_same_stat(const SMB_STRUCT_STAT *sbuf1,
const SMB_STRUCT_STAT *sbuf2)
{
if (sbuf1->st_ex_uid != sbuf2->st_ex_uid ||
return NT_STATUS_NOT_A_DIRECTORY;
}
- status = calculate_access_mask(conn, smb_dname, dir_existed,
- access_mask, &access_mask);
+ status = smbd_calculate_access_mask(conn, smb_dname, dir_existed,
+ access_mask, &access_mask);
if (!NT_STATUS_IS_OK(status)) {
- DEBUG(10, ("open_directory: calculate_access_mask "
+ DEBUG(10, ("open_directory: smbd_calculate_access_mask "
"on file %s returned %s\n",
smb_fname_str_dbg(smb_dname),
nt_errstr(status)));
/* If directory exists error. If directory doesn't
* exist create. */
+ if (dir_existed) {
+ status = NT_STATUS_OBJECT_NAME_COLLISION;
+ DEBUG(2, ("open_directory: unable to create "
+ "%s. Error was %s\n",
+ smb_fname_str_dbg(smb_dname),
+ nt_errstr(status)));
+ return status;
+ }
+
status = mkdir_internal(conn, smb_dname,
file_attributes);
* exist create.
*/
- status = mkdir_internal(conn, smb_dname,
+ if (dir_existed) {
+ status = NT_STATUS_OK;
+ info = FILE_WAS_OPENED;
+ } else {
+ status = mkdir_internal(conn, smb_dname,
file_attributes);
- if (NT_STATUS_IS_OK(status)) {
- info = FILE_WAS_CREATED;
+ if (NT_STATUS_IS_OK(status)) {
+ info = FILE_WAS_CREATED;
+ } else {
+ /* Cope with create race. */
+ if (!NT_STATUS_EQUAL(status,
+ NT_STATUS_OBJECT_NAME_COLLISION)) {
+ DEBUG(2, ("open_directory: unable to create "
+ "%s. Error was %s\n",
+ smb_fname_str_dbg(smb_dname),
+ nt_errstr(status)));
+ return status;
+ }
+ info = FILE_WAS_OPENED;
+ }
}
- if (NT_STATUS_EQUAL(status,
- NT_STATUS_OBJECT_NAME_COLLISION)) {
- info = FILE_WAS_OPENED;
- status = NT_STATUS_OK;
- }
-
break;
case FILE_SUPERSEDE:
}
if (info == FILE_WAS_OPENED) {
- uint32_t access_granted = 0;
- status = smbd_check_open_rights(conn, smb_dname, access_mask,
- &access_granted);
-
- /* Were we trying to do a directory open
- * for delete and didn't get DELETE
- * access (only) ? Check if the
- * directory allows DELETE_CHILD.
- * See here:
- * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
- * for details. */
-
- if ((NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED) &&
- (access_mask & DELETE_ACCESS) &&
- (access_granted == DELETE_ACCESS) &&
- can_delete_file_in_directory(conn, smb_dname))) {
- DEBUG(10,("open_directory: overrode ACCESS_DENIED "
- "on directory %s\n",
- smb_fname_str_dbg(smb_dname)));
- status = NT_STATUS_OK;
- }
-
+ status = smbd_check_access_rights(conn, smb_dname, access_mask);
if (!NT_STATUS_IS_OK(status)) {
- DEBUG(10, ("open_directory: smbd_check_open_rights on "
+ DEBUG(10, ("open_directory: smbd_check_access_rights on "
"file %s failed with %s\n",
smb_fname_str_dbg(smb_dname),
nt_errstr(status)));
/*
* Setup the files_struct for it.
*/
-
+
fsp->mode = smb_dname->st.st_ex_mode;
fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_dname->st);
fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
return status;
}
- set_share_mode(lck, fsp, get_current_uid(conn), 0, NO_OPLOCK);
+ set_share_mode(lck, fsp, get_current_uid(conn),
+ req ? req->mid : 0, NO_OPLOCK);
/* For directories the delete on close bit at open time seems
always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
struct server_id server_id,
DATA_BLOB *data)
{
- struct smbd_server_connection *sconn;
files_struct *fsp;
char *frm = (char *)data->data;
struct file_id id;
struct smb_filename *smb_fname = NULL;
size_t sp_len, bn_len;
NTSTATUS status;
-
- sconn = msg_ctx_to_sconn(msg);
- if (sconn == NULL) {
- DEBUG(1, ("could not find sconn\n"));
- return;
- }
+ struct smbd_server_connection *sconn =
+ talloc_get_type_abort(private_data,
+ struct smbd_server_connection);
if (data->data == NULL
|| data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
NTSTATUS open_streams_for_delete(connection_struct *conn,
const char *fname)
{
- struct stream_struct *stream_info;
- files_struct **streams;
+ struct stream_struct *stream_info = NULL;
+ files_struct **streams = NULL;
int i;
- unsigned int num_streams;
+ unsigned int num_streams = 0;
TALLOC_CTX *frame = talloc_stackframe();
NTSTATUS status;
- status = SMB_VFS_STREAMINFO(conn, NULL, fname, talloc_tos(),
- &num_streams, &stream_info);
+ status = vfs_streaminfo(conn, NULL, fname, talloc_tos(),
+ &num_streams, &stream_info);
if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
|| NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
}
if (!NT_STATUS_IS_OK(status)) {
- DEBUG(10, ("SMB_VFS_STREAMINFO failed: %s\n",
+ DEBUG(10, ("vfs_streaminfo failed: %s\n",
nt_errstr(status)));
goto fail;
}
return NT_STATUS_OK;
}
- streams = TALLOC_ARRAY(talloc_tos(), files_struct *, num_streams);
+ streams = talloc_array(talloc_tos(), files_struct *, num_streams);
if (streams == NULL) {
DEBUG(0, ("talloc failed\n"));
status = NT_STATUS_NO_MEMORY;
return status;
}
+/*********************************************************************
+ Create a default ACL by inheriting from the parent. If no inheritance
+ from the parent available, don't set anything. This will leave the actual
+ permissions the new file or directory already got from the filesystem
+ as the NT ACL when read.
+*********************************************************************/
+
+static NTSTATUS inherit_new_acl(files_struct *fsp)
+{
+ TALLOC_CTX *ctx = talloc_tos();
+ char *parent_name = NULL;
+ struct security_descriptor *parent_desc = NULL;
+ NTSTATUS status = NT_STATUS_OK;
+ struct security_descriptor *psd = NULL;
+ struct dom_sid *owner_sid = NULL;
+ struct dom_sid *group_sid = NULL;
+ uint32_t security_info_sent = (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL);
+ bool inherit_owner = lp_inherit_owner(SNUM(fsp->conn));
+ bool inheritable_components = false;
+ size_t size = 0;
+
+ if (!parent_dirname(ctx, fsp->fsp_name->base_name, &parent_name, NULL)) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ status = SMB_VFS_GET_NT_ACL(fsp->conn,
+ parent_name,
+ (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL),
+ &parent_desc);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+
+ inheritable_components = sd_has_inheritable_components(parent_desc,
+ fsp->is_directory);
+
+ if (!inheritable_components && !inherit_owner) {
+ /* Nothing to inherit and not setting owner. */
+ return NT_STATUS_OK;
+ }
+
+ /* Create an inherited descriptor from the parent. */
+
+ if (DEBUGLEVEL >= 10) {
+ DEBUG(10,("inherit_new_acl: parent acl for %s is:\n",
+ fsp_str_dbg(fsp) ));
+ NDR_PRINT_DEBUG(security_descriptor, parent_desc);
+ }
+
+ /* Inherit from parent descriptor if "inherit owner" set. */
+ if (inherit_owner) {
+ owner_sid = parent_desc->owner_sid;
+ group_sid = parent_desc->group_sid;
+ }
+
+ if (owner_sid == NULL) {
+ owner_sid = &fsp->conn->session_info->security_token->sids[PRIMARY_USER_SID_INDEX];
+ }
+ if (group_sid == NULL) {
+ group_sid = &fsp->conn->session_info->security_token->sids[PRIMARY_GROUP_SID_INDEX];
+ }
+
+ status = se_create_child_secdesc(ctx,
+ &psd,
+ &size,
+ parent_desc,
+ owner_sid,
+ group_sid,
+ fsp->is_directory);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+
+ /* If inheritable_components == false,
+ se_create_child_secdesc()
+ creates a security desriptor with a NULL dacl
+ entry, but with SEC_DESC_DACL_PRESENT. We need
+ to remove that flag. */
+
+ if (!inheritable_components) {
+ security_info_sent &= ~SECINFO_DACL;
+ psd->type &= ~SEC_DESC_DACL_PRESENT;
+ }
+
+ if (DEBUGLEVEL >= 10) {
+ DEBUG(10,("inherit_new_acl: child acl for %s is:\n",
+ fsp_str_dbg(fsp) ));
+ NDR_PRINT_DEBUG(security_descriptor, psd);
+ }
+
+ if (inherit_owner) {
+ /* We need to be root to force this. */
+ become_root();
+ }
+ status = SMB_VFS_FSET_NT_ACL(fsp,
+ security_info_sent,
+ psd);
+ if (inherit_owner) {
+ unbecome_root();
+ }
+ return status;
+}
+
/*
* Wrapper around open_file_ntcreate and open_directory
*/
}
}
- /* This is the correct thing to do (check every time) but can_delete
- * is expensive (it may have to read the parent directory
- * permissions). So for now we're not doing it unless we have a strong
- * hint the client is really going to delete this file. If the client
- * is forcing FILE_CREATE let the filesystem take care of the
- * permissions. */
-
- /* Setting FILE_SHARE_DELETE is the hint. */
-
- if (lp_acl_check_permissions(SNUM(conn))
- && (create_disposition != FILE_CREATE)
- && (share_access & FILE_SHARE_DELETE)
- && (access_mask & DELETE_ACCESS)
- && (!(can_delete_file_in_directory(conn, smb_fname) ||
- can_access_file_acl(conn, smb_fname, DELETE_ACCESS)))) {
- status = NT_STATUS_ACCESS_DENIED;
- DEBUG(10,("create_file_unixpath: open file %s "
- "for delete ACCESS_DENIED\n",
- smb_fname_str_dbg(smb_fname)));
- goto fail;
- }
-
if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
!security_token_has_privilege(get_current_nttok(conn),
SEC_PRIV_SECURITY)) {
fsp->base_fsp = base_fsp;
- /*
- * According to the MS documentation, the only time the security
- * descriptor is applied to the opened file is iff we *created* the
- * file; an existing file stays the same.
- *
- * Also, it seems (from observation) that you can open the file with
- * any access mask but you can still write the sd. We need to override
- * the granted access before we call set_sd
- * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
- */
-
- if ((sd != NULL) && (info == FILE_WAS_CREATED)
- && lp_nt_acl_support(SNUM(conn))) {
-
- uint32_t sec_info_sent;
- uint32_t saved_access_mask = fsp->access_mask;
-
- sec_info_sent = get_sec_info(sd);
-
- fsp->access_mask = FILE_GENERIC_ALL;
-
- /* Convert all the generic bits. */
- security_acl_map_generic(sd->dacl, &file_generic_mapping);
- security_acl_map_generic(sd->sacl, &file_generic_mapping);
-
- if (sec_info_sent & (SECINFO_OWNER|
- SECINFO_GROUP|
- SECINFO_DACL|
- SECINFO_SACL)) {
- status = SMB_VFS_FSET_NT_ACL(fsp, sec_info_sent, sd);
- }
-
- fsp->access_mask = saved_access_mask;
-
- if (!NT_STATUS_IS_OK(status)) {
- goto fail;
- }
- }
-
if ((ea_list != NULL) &&
((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN))) {
status = set_ea(conn, fsp, fsp->fsp_name, ea_list);
}
}
+ if ((info == FILE_WAS_CREATED) && lp_nt_acl_support(SNUM(conn)) &&
+ fsp->base_fsp == NULL) {
+ if (sd != NULL) {
+ /*
+ * According to the MS documentation, the only time the security
+ * descriptor is applied to the opened file is iff we *created* the
+ * file; an existing file stays the same.
+ *
+ * Also, it seems (from observation) that you can open the file with
+ * any access mask but you can still write the sd. We need to override
+ * the granted access before we call set_sd
+ * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
+ */
+
+ uint32_t sec_info_sent;
+ uint32_t saved_access_mask = fsp->access_mask;
+
+ sec_info_sent = get_sec_info(sd);
+
+ fsp->access_mask = FILE_GENERIC_ALL;
+
+ /* Convert all the generic bits. */
+ security_acl_map_generic(sd->dacl, &file_generic_mapping);
+ security_acl_map_generic(sd->sacl, &file_generic_mapping);
+
+ if (sec_info_sent & (SECINFO_OWNER|
+ SECINFO_GROUP|
+ SECINFO_DACL|
+ SECINFO_SACL)) {
+ status = SMB_VFS_FSET_NT_ACL(fsp, sec_info_sent, sd);
+ }
+
+ fsp->access_mask = saved_access_mask;
+
+ if (!NT_STATUS_IS_OK(status)) {
+ goto fail;
+ }
+ } else if (lp_inherit_acls(SNUM(conn))) {
+ /* Inherit from parent. Errors here are not fatal. */
+ status = inherit_new_acl(fsp);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(10,("inherit_new_acl: failed for %s with %s\n",
+ fsp_str_dbg(fsp),
+ nt_errstr(status) ));
+ }
+ }
+ }
+
DEBUG(10, ("create_file_unixpath: info=%d\n", info));
*result = fsp;
* Copy in the base directory name.
*/
- parent_fname = TALLOC_ARRAY(talloc_tos(), char,
+ parent_fname = talloc_array(talloc_tos(), char,
dir_name_len+2);
if (parent_fname == NULL) {
status = NT_STATUS_NO_MEMORY;
git.samba.org / kai / samba.git / blobdiff