--- /dev/null
+/*
+ * Store Windows ACLs in xattrs, or a tdb if configured that way.
+ *
+ * Copyright (C) Volker Lendecke, 2008
+ * Copyright (C) Jeremy Allison, 2008
+ *
+ * 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/>.
+ */
+
+/* NOTE: This is an experimental module, not yet finished. JRA. */
+
+#include "includes.h"
+#include "librpc/gen_ndr/xattr.h"
+#include "librpc/gen_ndr/ndr_xattr.h"
+
+#undef DBGC_CLASS
+#define DBGC_CLASS DBGC_VFS
+
+static unsigned int ref_count;
+static struct db_context *acl_db;
+
+/*******************************************************************
+ Open acl_db if not already open, increment ref count.
+*******************************************************************/
+
+static bool acl_tdb_init(struct db_context **pp_db)
+{
+ const char *dbname;
+
+ if (acl_db) {
+ *pp_db = acl_db;
+ ref_count++;
+ return true;
+ }
+
+ dbname = lock_path("file_ntacls.tdb");
+
+ if (dbname == NULL) {
+ errno = ENOSYS;
+ return false;
+ }
+
+ become_root();
+ *pp_db = db_open(NULL, dbname, 0, TDB_DEFAULT, O_RDWR|O_CREAT, 0600);
+ unbecome_root();
+
+ if (*pp_db == NULL) {
+#if defined(ENOTSUP)
+ errno = ENOTSUP;
+#else
+ errno = ENOSYS;
+#endif
+ return false;
+ }
+
+ ref_count++;
+ return true;
+}
+
+/*******************************************************************
+ Lower ref count and close acl_db if zero.
+*******************************************************************/
+
+static void free_acl_xattr_data(void **pptr)
+{
+ struct db_context **pp_db = (struct db_context **)pptr;
+
+ ref_count--;
+ if (ref_count == 0) {
+ TALLOC_FREE(*pp_db);
+ acl_db = NULL;
+ }
+}
+
+/*******************************************************************
+ Fetch_lock the tdb acl record for a file
+*******************************************************************/
+
+static struct db_record *acl_xattr_tdb_lock(TALLOC_CTX *mem_ctx,
+ struct db_context *db,
+ const struct file_id *id)
+{
+ uint8 id_buf[16];
+ push_file_id_16((char *)id_buf, id);
+ return db->fetch_locked(db,
+ mem_ctx,
+ make_tdb_data(id_buf,
+ sizeof(id_buf)));
+}
+
+/*******************************************************************
+ Parse out a struct security_descriptor from a DATA_BLOB.
+*******************************************************************/
+
+static NTSTATUS parse_acl_blob(const DATA_BLOB *pblob,
+ uint32 security_info,
+ struct security_descriptor **ppdesc)
+{
+ TALLOC_CTX *ctx = talloc_tos();
+ struct xattr_NTACL xacl;
+ enum ndr_err_code ndr_err;
+ size_t sd_size;
+
+ ndr_err = ndr_pull_struct_blob(pblob, ctx, &xacl,
+ (ndr_pull_flags_fn_t)ndr_pull_xattr_NTACL);
+
+ if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+ DEBUG(5, ("parse_acl_blob: ndr_pull_xattr_NTACL failed: %s\n",
+ ndr_errstr(ndr_err)));
+ return ndr_map_error2ntstatus(ndr_err);;
+ }
+
+ if (xacl.version != 2) {
+ return NT_STATUS_REVISION_MISMATCH;
+ }
+
+ *ppdesc = make_sec_desc(ctx, SEC_DESC_REVISION, xacl.info.sd_ts->sd->type | SEC_DESC_SELF_RELATIVE,
+ (security_info & OWNER_SECURITY_INFORMATION)
+ ? xacl.info.sd_ts->sd->owner_sid : NULL,
+ (security_info & GROUP_SECURITY_INFORMATION)
+ ? xacl.info.sd_ts->sd->group_sid : NULL,
+ (security_info & SACL_SECURITY_INFORMATION)
+ ? xacl.info.sd_ts->sd->sacl : NULL,
+ (security_info & DACL_SECURITY_INFORMATION)
+ ? xacl.info.sd_ts->sd->dacl : NULL,
+ &sd_size);
+
+ TALLOC_FREE(xacl.info.sd);
+
+ return (*ppdesc != NULL) ? NT_STATUS_OK : NT_STATUS_NO_MEMORY;
+}
+
+/*******************************************************************
+ Pull a security descriptor into a DATA_BLOB from a tdb store.
+*******************************************************************/
+
+static NTSTATUS get_acl_blob(TALLOC_CTX *ctx,
+ vfs_handle_struct *handle,
+ files_struct *fsp,
+ const char *name,
+ DATA_BLOB *pblob)
+{
+ uint8 id_buf[16];
+ TDB_DATA data;
+ struct file_id id;
+ struct db_context *db;
+ SMB_STRUCT_STAT sbuf;
+
+ SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context,
+ return NT_STATUS_INTERNAL_DB_CORRUPTION);
+
+ if (fsp && fsp->fh->fd != -1) {
+ if (SMB_VFS_FSTAT(fsp, &sbuf) == -1) {
+ return map_nt_error_from_unix(errno);
+ }
+ } else {
+ if (SMB_VFS_STAT(handle->conn, name, &sbuf) == -1) {
+ return map_nt_error_from_unix(errno);
+ }
+ }
+ id = vfs_file_id_from_sbuf(handle->conn, &sbuf);
+
+ push_file_id_16((char *)id_buf, &id);
+
+ if (db->fetch(db,
+ ctx,
+ make_tdb_data(id_buf, sizeof(id_buf)),
+ &data) == -1) {
+ return NT_STATUS_INTERNAL_DB_CORRUPTION;
+ }
+
+ pblob->data = data.dptr;
+ pblob->length = data.dsize;
+
+ DEBUG(10,("get_acl_blob: returned %u bytes from file %s\n",
+ (unsigned int)data.dsize, name ));
+
+ if (pblob->length == 0 || pblob->data == NULL) {
+ return NT_STATUS_OBJECT_NAME_NOT_FOUND;
+ }
+ return NT_STATUS_OK;
+}
+
+/*******************************************************************
+ Create a DATA_BLOB from a security descriptor.
+*******************************************************************/
+
+static NTSTATUS create_acl_blob(const struct security_descriptor *psd, DATA_BLOB *pblob)
+{
+ struct xattr_NTACL xacl;
+ struct security_descriptor_timestamp sd_ts;
+ enum ndr_err_code ndr_err;
+ TALLOC_CTX *ctx = talloc_tos();
+ struct timespec curr = timespec_current();
+
+ ZERO_STRUCT(xacl);
+ ZERO_STRUCT(sd_ts);
+
+ /* Horrid hack as setting an xattr changes the ctime
+ * on Linux. This gives a race of 1 second during
+ * which we would not see a POSIX ACL set.
+ */
+ curr.tv_sec += 1;
+
+ xacl.version = 2;
+ xacl.info.sd_ts = &sd_ts;
+ xacl.info.sd_ts->sd = CONST_DISCARD(struct security_descriptor *, psd);
+ unix_timespec_to_nt_time(&xacl.info.sd_ts->last_changed, curr);
+
+ DEBUG(10, ("create_acl_blob: timestamp stored as %s\n",
+ timestring(ctx, curr.tv_sec) ));
+
+ ndr_err = ndr_push_struct_blob(
+ pblob, ctx, &xacl,
+ (ndr_push_flags_fn_t)ndr_push_xattr_NTACL);
+
+ if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+ DEBUG(5, ("create_acl_blob: ndr_push_xattr_NTACL failed: %s\n",
+ ndr_errstr(ndr_err)));
+ return ndr_map_error2ntstatus(ndr_err);;
+ }
+
+ return NT_STATUS_OK;
+}
+
+/*******************************************************************
+ Store a DATA_BLOB into a tdb record given an fsp pointer.
+*******************************************************************/
+
+static NTSTATUS store_acl_blob_fsp(vfs_handle_struct *handle,
+ files_struct *fsp,
+ DATA_BLOB *pblob)
+{
+ uint8 id_buf[16];
+ struct file_id id;
+ SMB_STRUCT_STAT sbuf;
+ TDB_DATA data;
+ struct db_context *db;
+ struct db_record *rec;
+
+ DEBUG(10,("store_acl_blob_fsp: storing blob length %u on file %s\n",
+ (unsigned int)pblob->length, fsp->fsp_name));
+
+ SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context,
+ return NT_STATUS_INTERNAL_DB_CORRUPTION);
+
+ if (fsp->fh->fd != -1) {
+ if (SMB_VFS_FSTAT(fsp, &sbuf) == -1) {
+ return map_nt_error_from_unix(errno);
+ }
+ } else {
+ if (SMB_VFS_STAT(handle->conn, fsp->fsp_name, &sbuf) == -1) {
+ return map_nt_error_from_unix(errno);
+ }
+ }
+ id = vfs_file_id_from_sbuf(handle->conn, &sbuf);
+
+ push_file_id_16((char *)id_buf, &id);
+ rec = db->fetch_locked(db, talloc_tos(),
+ make_tdb_data(id_buf,
+ sizeof(id_buf)));
+ if (rec == NULL) {
+ DEBUG(0, ("store_acl_blob_fsp_tdb: fetch_lock failed\n"));
+ return NT_STATUS_INTERNAL_DB_CORRUPTION;
+ }
+ data.dptr = pblob->data;
+ data.dsize = pblob->length;
+ return rec->store(rec, data, 0);
+}
+
+/*******************************************************************
+ Store a DATA_BLOB into a tdb record given a pathname.
+*******************************************************************/
+
+static NTSTATUS store_acl_blob_pathname(vfs_handle_struct *handle,
+ const char *fname,
+ DATA_BLOB *pblob)
+{
+ uint8 id_buf[16];
+ struct file_id id;
+ TDB_DATA data;
+ SMB_STRUCT_STAT sbuf;
+ struct db_context *db;
+ struct db_record *rec;
+
+ DEBUG(10,("store_acl_blob_pathname: storing blob "
+ "length %u on file %s\n",
+ (unsigned int)pblob->length, fname));
+
+ SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context,
+ return NT_STATUS_INTERNAL_DB_CORRUPTION);
+
+ if (SMB_VFS_STAT(handle->conn, fname, &sbuf) == -1) {
+ return map_nt_error_from_unix(errno);
+ }
+
+ id = vfs_file_id_from_sbuf(handle->conn, &sbuf);
+ push_file_id_16((char *)id_buf, &id);
+
+ rec = db->fetch_locked(db, talloc_tos(),
+ make_tdb_data(id_buf,
+ sizeof(id_buf)));
+ if (rec == NULL) {
+ DEBUG(0, ("store_acl_blob_pathname_tdb: fetch_lock failed\n"));
+ return NT_STATUS_INTERNAL_DB_CORRUPTION;
+ }
+ data.dptr = pblob->data;
+ data.dsize = pblob->length;
+ return rec->store(rec, data, 0);
+}
+
+/*******************************************************************
+ Store a DATA_BLOB into an xattr given a pathname.
+*******************************************************************/
+
+static NTSTATUS get_nt_acl_xattr_internal(vfs_handle_struct *handle,
+ files_struct *fsp,
+ const char *name,
+ uint32 security_info,
+ struct security_descriptor **ppdesc)
+{
+ TALLOC_CTX *ctx = talloc_tos();
+ DATA_BLOB blob;
+ NTSTATUS status;
+
+ if (fsp && name == NULL) {
+ name = fsp->fsp_name;
+ }
+
+ DEBUG(10, ("get_nt_acl_xattr_internal: name=%s\n", name));
+
+ status = get_acl_blob(ctx, handle, fsp, name, &blob);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(10, ("get_acl_blob returned %s\n", nt_errstr(status)));
+ return status;
+ }
+
+ status = parse_acl_blob(&blob, security_info, ppdesc);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(10, ("parse_acl_blob returned %s\n",
+ nt_errstr(status)));
+ return status;
+ }
+
+ TALLOC_FREE(blob.data);
+ return status;
+}
+
+/*********************************************************************
+ Create a default security descriptor for a file in case no inheritance
+ exists. All permissions to the owner and SYSTEM.
+*********************************************************************/
+
+static struct security_descriptor *default_file_sd(TALLOC_CTX *mem_ctx,
+ SMB_STRUCT_STAT *psbuf)
+{
+ struct dom_sid owner_sid, group_sid;
+ size_t sd_size;
+ struct security_ace *pace = NULL;
+ struct security_acl *pacl = NULL;
+
+ uid_to_sid(&owner_sid, psbuf->st_uid);
+ gid_to_sid(&group_sid, psbuf->st_gid);
+
+ pace = TALLOC_ARRAY(mem_ctx, struct security_ace, 2);
+ if (!pace) {
+ return NULL;
+ }
+
+ init_sec_ace(&pace[0], &owner_sid, SEC_ACE_TYPE_ACCESS_ALLOWED,
+ SEC_RIGHTS_FILE_ALL, 0);
+ init_sec_ace(&pace[1], &global_sid_System, SEC_ACE_TYPE_ACCESS_ALLOWED,
+ SEC_RIGHTS_FILE_ALL, 0);
+
+ pacl = make_sec_acl(mem_ctx,
+ NT4_ACL_REVISION,
+ 2,
+ pace);
+ if (!pacl) {
+ return NULL;
+ }
+ return make_sec_desc(mem_ctx,
+ SECURITY_DESCRIPTOR_REVISION_1,
+ SEC_DESC_SELF_RELATIVE|SEC_DESC_DACL_PRESENT,
+ &owner_sid,
+ &group_sid,
+ NULL,
+ pacl,
+ &sd_size);
+}
+
+/*********************************************************************
+*********************************************************************/
+
+static NTSTATUS inherit_new_acl(vfs_handle_struct *handle,
+ const char *fname,
+ files_struct *fsp,
+ bool container)
+{
+ TALLOC_CTX *ctx = talloc_tos();
+ NTSTATUS status;
+ struct security_descriptor *parent_desc = NULL;
+ struct security_descriptor *psd = NULL;
+ DATA_BLOB blob;
+ size_t size;
+ char *parent_name;
+
+ if (!parent_dirname_talloc(ctx,
+ fname,
+ &parent_name,
+ NULL)) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ DEBUG(10,("inherit_new_acl: check directory %s\n",
+ parent_name));
+
+ status = get_nt_acl_xattr_internal(handle,
+ NULL,
+ parent_name,
+ (OWNER_SECURITY_INFORMATION |
+ GROUP_SECURITY_INFORMATION |
+ DACL_SECURITY_INFORMATION),
+ &parent_desc);
+ if (NT_STATUS_IS_OK(status)) {
+ /* Create an inherited descriptor from the parent. */
+
+ if (DEBUGLEVEL >= 10) {
+ DEBUG(10,("inherit_new_acl: parent acl is:\n"));
+ NDR_PRINT_DEBUG(security_descriptor, parent_desc);
+ }
+
+ status = se_create_child_secdesc(ctx,
+ &psd,
+ &size,
+ parent_desc,
+ &handle->conn->server_info->ptok->user_sids[PRIMARY_USER_SID_INDEX],
+ &handle->conn->server_info->ptok->user_sids[PRIMARY_GROUP_SID_INDEX],
+ container);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+
+ if (DEBUGLEVEL >= 10) {
+ DEBUG(10,("inherit_new_acl: child acl is:\n"));
+ NDR_PRINT_DEBUG(security_descriptor, psd);
+ }
+
+ } else {
+ DEBUG(10,("inherit_new_acl: directory %s failed "
+ "to get acl %s\n",
+ parent_name,
+ nt_errstr(status) ));
+ }
+
+ if (!psd || psd->dacl == NULL) {
+ SMB_STRUCT_STAT sbuf;
+ int ret;
+
+ TALLOC_FREE(psd);
+ if (fsp && !fsp->is_directory && fsp->fh->fd != -1) {
+ ret = SMB_VFS_FSTAT(fsp, &sbuf);
+ } else {
+ ret = SMB_VFS_STAT(handle->conn,fname, &sbuf);
+ }
+ if (ret == -1) {
+ return map_nt_error_from_unix(errno);
+ }
+ psd = default_file_sd(ctx, &sbuf);
+ if (!psd) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ if (DEBUGLEVEL >= 10) {
+ DEBUG(10,("inherit_new_acl: default acl is:\n"));
+ NDR_PRINT_DEBUG(security_descriptor, psd);
+ }
+ }
+
+ status = create_acl_blob(psd, &blob);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+ if (fsp) {
+ return store_acl_blob_fsp(handle, fsp, &blob);
+ } else {
+ return store_acl_blob_pathname(handle, fname, &blob);
+ }
+}
+
+/*********************************************************************
+ Check ACL on open. For new files inherit from parent directory.
+*********************************************************************/
+
+static int open_acl_xattr(vfs_handle_struct *handle,
+ const char *fname,
+ files_struct *fsp,
+ int flags,
+ mode_t mode)
+{
+ uint32_t access_granted = 0;
+ struct security_descriptor *pdesc = NULL;
+ bool file_existed = true;
+ NTSTATUS status = get_nt_acl_xattr_internal(handle,
+ NULL,
+ fname,
+ (OWNER_SECURITY_INFORMATION |
+ GROUP_SECURITY_INFORMATION |
+ DACL_SECURITY_INFORMATION),
+ &pdesc);
+ if (NT_STATUS_IS_OK(status)) {
+ /* See if we can access it. */
+ status = smb1_file_se_access_check(pdesc,
+ handle->conn->server_info->ptok,
+ fsp->access_mask,
+ &access_granted);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(10,("open_acl_xattr: file %s open "
+ "refused with error %s\n",
+ fname,
+ nt_errstr(status) ));
+ errno = map_errno_from_nt_status(status);
+ return -1;
+ }
+ } else if (NT_STATUS_EQUAL(status,NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
+ file_existed = false;
+ }
+
+ DEBUG(10,("open_acl_xattr: get_nt_acl_attr_internal for "
+ "file %s returned %s\n",
+ fname,
+ nt_errstr(status) ));
+
+ fsp->fh->fd = SMB_VFS_NEXT_OPEN(handle, fname, fsp, flags, mode);
+
+ if (!file_existed && fsp->fh->fd != -1) {
+ /* File was created. Inherit from parent directory. */
+ string_set(&fsp->fsp_name, fname);
+ inherit_new_acl(handle, fname, fsp, false);
+ }
+
+ return fsp->fh->fd;
+}
+
+/*********************************************************************
+ On unlink we need to delete the tdb record (if using tdb).
+*********************************************************************/
+
+static int unlink_acl_xattr(vfs_handle_struct *handle, const char *path)
+{
+ SMB_STRUCT_STAT sbuf;
+ struct file_id id;
+ struct db_context *db;
+ struct db_record *rec;
+ int ret;
+
+ SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context, return -1);
+
+ if (SMB_VFS_STAT(handle->conn, path, &sbuf) == -1) {
+ return -1;
+ }
+
+ ret = SMB_VFS_NEXT_UNLINK(handle, path);
+
+ if (ret == -1) {
+ return -1;
+ }
+
+ id = vfs_file_id_from_sbuf(handle->conn, &sbuf);
+
+ rec = acl_xattr_tdb_lock(talloc_tos(), db, &id);
+
+ /*
+ * If rec == NULL there's not much we can do about it
+ */
+
+ if (rec == NULL) {
+ DEBUG(10,("unlink_acl_xattr: path %s rec == NULL\n",
+ path ));
+ TALLOC_FREE(rec);
+ return 0;
+ }
+
+ rec->delete_rec(rec);
+ TALLOC_FREE(rec);
+
+ return 0;
+}
+
+/*********************************************************************
+ Store an inherited SD on mkdir.
+*********************************************************************/
+
+static int mkdir_acl_xattr(vfs_handle_struct *handle, const char *path, mode_t mode)
+{
+ int ret = SMB_VFS_NEXT_MKDIR(handle, path, mode);
+
+ if (ret == -1) {
+ return ret;
+ }
+ /* New directory - inherit from parent. */
+ inherit_new_acl(handle, path, NULL, true);
+ return ret;
+}
+
+/*********************************************************************
+ On rmdir we need to delete the tdb record (if using tdb).
+*********************************************************************/
+
+static int rmdir_acl_xattr(vfs_handle_struct *handle, const char *path)
+{
+ SMB_STRUCT_STAT sbuf;
+ struct file_id id;
+ struct db_context *db;
+ struct db_record *rec;
+ int ret;
+
+ SMB_VFS_HANDLE_GET_DATA(handle, db, struct db_context, return -1);
+
+ if (SMB_VFS_STAT(handle->conn, path, &sbuf) == -1) {
+ return -1;
+ }
+
+ ret = SMB_VFS_NEXT_RMDIR(handle, path);
+
+ if (ret == -1) {
+ return -1;
+ }
+
+ id = vfs_file_id_from_sbuf(handle->conn, &sbuf);
+
+ rec = acl_xattr_tdb_lock(talloc_tos(), db, &id);
+
+ /*
+ * If rec == NULL there's not much we can do about it
+ */
+
+ if (rec == NULL) {
+ DEBUG(10,("rmdir_acl_xattr: path %s rec == NULL\n",
+ path ));
+ TALLOC_FREE(rec);
+ return 0;
+ }
+
+ rec->delete_rec(rec);
+ TALLOC_FREE(rec);
+
+ return 0;
+}
+
+/*********************************************************************
+ Fetch a security descriptor given an fsp.
+*********************************************************************/
+
+static NTSTATUS fget_nt_acl_xattr(vfs_handle_struct *handle, files_struct *fsp,
+ uint32 security_info, struct security_descriptor **ppdesc)
+{
+ NTSTATUS status = get_nt_acl_xattr_internal(handle, fsp,
+ NULL, security_info, ppdesc);
+ if (NT_STATUS_IS_OK(status)) {
+ if (DEBUGLEVEL >= 10) {
+ DEBUG(10,("fget_nt_acl_xattr: returning xattr sd for file %s\n",
+ fsp->fsp_name));
+ NDR_PRINT_DEBUG(security_descriptor, *ppdesc);
+ }
+ return NT_STATUS_OK;
+ }
+
+ DEBUG(10,("fget_nt_acl_xattr: failed to get xattr sd for file %s, Error %s\n",
+ fsp->fsp_name,
+ nt_errstr(status) ));
+
+ return SMB_VFS_NEXT_FGET_NT_ACL(handle, fsp,
+ security_info, ppdesc);
+}
+
+/*********************************************************************
+ Fetch a security descriptor given a pathname.
+*********************************************************************/
+
+static NTSTATUS get_nt_acl_xattr(vfs_handle_struct *handle,
+ const char *name, uint32 security_info, struct security_descriptor **ppdesc)
+{
+ NTSTATUS status = get_nt_acl_xattr_internal(handle, NULL,
+ name, security_info, ppdesc);
+ if (NT_STATUS_IS_OK(status)) {
+ if (DEBUGLEVEL >= 10) {
+ DEBUG(10,("get_nt_acl_xattr: returning xattr sd for file %s\n",
+ name));
+ NDR_PRINT_DEBUG(security_descriptor, *ppdesc);
+ }
+ return NT_STATUS_OK;
+ }
+
+ DEBUG(10,("get_nt_acl_xattr: failed to get xattr sd for file %s, Error %s\n",
+ name,
+ nt_errstr(status) ));
+
+ return SMB_VFS_NEXT_GET_NT_ACL(handle, name,
+ security_info, ppdesc);
+}
+
+/*********************************************************************
+ Store a security descriptor given an fsp.
+*********************************************************************/
+
+static NTSTATUS fset_nt_acl_xattr(vfs_handle_struct *handle, files_struct *fsp,
+ uint32 security_info_sent, const struct security_descriptor *psd)
+{
+ NTSTATUS status;
+ DATA_BLOB blob;
+
+ if (DEBUGLEVEL >= 10) {
+ DEBUG(10,("fset_nt_acl_xattr: incoming sd for file %s\n",
+ fsp->fsp_name));
+ NDR_PRINT_DEBUG(security_descriptor,
+ CONST_DISCARD(struct security_descriptor *,psd));
+ }
+
+ status = SMB_VFS_NEXT_FSET_NT_ACL(handle, fsp, security_info_sent, psd);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+
+ /* Ensure owner and group are set. */
+ if (!psd->owner_sid || !psd->group_sid) {
+ int ret;
+ SMB_STRUCT_STAT sbuf;
+ DOM_SID owner_sid, group_sid;
+ struct security_descriptor *nc_psd = dup_sec_desc(talloc_tos(), psd);
+
+ if (!nc_psd) {
+ return NT_STATUS_OK;
+ }
+ if (fsp->is_directory || fsp->fh->fd == -1) {
+ ret = SMB_VFS_STAT(fsp->conn,fsp->fsp_name, &sbuf);
+ } else {
+ ret = SMB_VFS_FSTAT(fsp, &sbuf);
+ }
+ if (ret == -1) {
+ /* Lower level acl set succeeded,
+ * so still return OK. */
+ return NT_STATUS_OK;
+ }
+ create_file_sids(&sbuf, &owner_sid, &group_sid);
+ /* This is safe as nc_psd is discarded at fn exit. */
+ nc_psd->owner_sid = &owner_sid;
+ nc_psd->group_sid = &group_sid;
+ security_info_sent |= (OWNER_SECURITY_INFORMATION|GROUP_SECURITY_INFORMATION);
+ psd = nc_psd;
+ }
+
+ if ((security_info_sent & DACL_SECURITY_INFORMATION) &&
+ psd->dacl != NULL &&
+ (psd->type & (SE_DESC_DACL_AUTO_INHERITED|
+ SE_DESC_DACL_AUTO_INHERIT_REQ))==
+ (SE_DESC_DACL_AUTO_INHERITED|
+ SE_DESC_DACL_AUTO_INHERIT_REQ) ) {
+ struct security_descriptor *new_psd = NULL;
+ status = append_parent_acl(fsp, psd, &new_psd);
+ if (!NT_STATUS_IS_OK(status)) {
+ /* Lower level acl set succeeded,
+ * so still return OK. */
+ return NT_STATUS_OK;
+ }
+ psd = new_psd;
+ }
+
+ if (DEBUGLEVEL >= 10) {
+ DEBUG(10,("fset_nt_acl_xattr: storing xattr sd for file %s\n",
+ fsp->fsp_name));
+ NDR_PRINT_DEBUG(security_descriptor,
+ CONST_DISCARD(struct security_descriptor *,psd));
+ }
+ create_acl_blob(psd, &blob);
+ store_acl_blob_fsp(handle, fsp, &blob);
+
+ return NT_STATUS_OK;
+}
+
+/*******************************************************************
+ Handle opening the storage tdb if so configured.
+*******************************************************************/
+
+static int connect_acl_xattr(struct vfs_handle_struct *handle,
+ const char *service,
+ const char *user)
+{
+ struct db_context *db;
+ int res;
+
+ res = SMB_VFS_NEXT_CONNECT(handle, service, user);
+ if (res < 0) {
+ return res;
+ }
+
+ if (!acl_tdb_init(&db)) {
+ SMB_VFS_NEXT_DISCONNECT(handle);
+ return -1;
+ }
+
+ SMB_VFS_HANDLE_SET_DATA(handle, db, free_acl_xattr_data,
+ struct db_context, return -1);
+
+ return 0;
+}
+
+/* VFS operations structure */
+
+static vfs_op_tuple skel_op_tuples[] =
+{
+ {SMB_VFS_OP(connect_acl_xattr), SMB_VFS_OP_CONNECT, SMB_VFS_LAYER_TRANSPARENT},
+
+ {SMB_VFS_OP(mkdir_acl_xattr), SMB_VFS_OP_MKDIR, SMB_VFS_LAYER_TRANSPARENT},
+ {SMB_VFS_OP(rmdir_acl_xattr), SMB_VFS_OP_RMDIR, SMB_VFS_LAYER_TRANSPARENT},
+
+ {SMB_VFS_OP(open_acl_xattr), SMB_VFS_OP_OPEN, SMB_VFS_LAYER_TRANSPARENT},
+ {SMB_VFS_OP(unlink_acl_xattr), SMB_VFS_OP_UNLINK, SMB_VFS_LAYER_TRANSPARENT},
+
+ /* NT File ACL operations */
+
+ {SMB_VFS_OP(fget_nt_acl_xattr),SMB_VFS_OP_FGET_NT_ACL,SMB_VFS_LAYER_TRANSPARENT},
+ {SMB_VFS_OP(get_nt_acl_xattr), SMB_VFS_OP_GET_NT_ACL, SMB_VFS_LAYER_TRANSPARENT},
+ {SMB_VFS_OP(fset_nt_acl_xattr),SMB_VFS_OP_FSET_NT_ACL,SMB_VFS_LAYER_TRANSPARENT},
+
+ {SMB_VFS_OP(NULL), SMB_VFS_OP_NOOP, SMB_VFS_LAYER_NOOP}
+};
+
+NTSTATUS vfs_acl_xattr_init(void)
+{
+ return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "acl_tdb", skel_op_tuples);
+}
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_VFS
+/*******************************************************************
+ Parse out a struct security_descriptor from a DATA_BLOB.
+*******************************************************************/
+
static NTSTATUS parse_acl_blob(const DATA_BLOB *pblob,
- const struct timespec cts,
uint32 security_info,
struct security_descriptor **ppdesc)
{
return NT_STATUS_REVISION_MISMATCH;
}
-#if 0
- {
- struct timespec ts;
- /* Arg. This doesn't work. Too many activities
- * change the ctime. May have to roll back to
- * version 1.
- */
- /*
- * Check that the ctime timestamp is ealier
- * than the stored timestamp.
- */
-
- ts = nt_time_to_unix_timespec(&xacl.info.sd_ts->last_changed);
-
- if (timespec_compare(&cts, &ts) > 0) {
- DEBUG(5, ("parse_acl_blob: stored ACL out of date "
- "(%s > %s.\n",
- timestring(ctx, cts.tv_sec),
- timestring(ctx, ts.tv_sec)));
- return NT_STATUS_EA_CORRUPT_ERROR;
- }
- }
-#endif
-
*ppdesc = make_sec_desc(ctx, SEC_DESC_REVISION, xacl.info.sd_ts->sd->type | SEC_DESC_SELF_RELATIVE,
(security_info & OWNER_SECURITY_INFORMATION)
? xacl.info.sd_ts->sd->owner_sid : NULL,
return (*ppdesc != NULL) ? NT_STATUS_OK : NT_STATUS_NO_MEMORY;
}
+/*******************************************************************
+ Pull a security descriptor into a DATA_BLOB from a xattr.
+*******************************************************************/
+
static NTSTATUS get_acl_blob(TALLOC_CTX *ctx,
vfs_handle_struct *handle,
files_struct *fsp,
return NT_STATUS_OK;
}
+/*******************************************************************
+ Create a DATA_BLOB from a security descriptor.
+*******************************************************************/
+
static NTSTATUS create_acl_blob(const struct security_descriptor *psd, DATA_BLOB *pblob)
{
struct xattr_NTACL xacl;
return NT_STATUS_OK;
}
-static NTSTATUS store_acl_blob_fsp(files_struct *fsp,
+/*******************************************************************
+ Store a DATA_BLOB into an xattr given an fsp pointer.
+*******************************************************************/
+
+static NTSTATUS store_acl_blob_fsp(vfs_handle_struct *handle,
+ files_struct *fsp,
DATA_BLOB *pblob)
{
int ret;
return NT_STATUS_OK;
}
-static NTSTATUS store_acl_blob_pathname(connection_struct *conn,
+/*******************************************************************
+ Store a DATA_BLOB into an xattr given a pathname.
+*******************************************************************/
+
+static NTSTATUS store_acl_blob_pathname(vfs_handle_struct *handle,
const char *fname,
DATA_BLOB *pblob)
{
+ connection_struct *conn = handle->conn;
int ret;
int saved_errno = 0;
return NT_STATUS_OK;
}
+/*******************************************************************
+ Store a DATA_BLOB into an xattr given a pathname.
+*******************************************************************/
static NTSTATUS get_nt_acl_xattr_internal(vfs_handle_struct *handle,
files_struct *fsp,
{
TALLOC_CTX *ctx = talloc_tos();
DATA_BLOB blob;
- SMB_STRUCT_STAT sbuf;
NTSTATUS status;
if (fsp && name == NULL) {
return status;
}
- if (fsp && fsp->fh->fd != -1) {
- if (SMB_VFS_FSTAT(fsp, &sbuf) == -1) {
- return map_nt_error_from_unix(errno);
- }
- } else {
- if (SMB_VFS_STAT(handle->conn, name, &sbuf) == -1) {
- return map_nt_error_from_unix(errno);
- }
- }
-
- status = parse_acl_blob(&blob, get_ctimespec(&sbuf),
- security_info, ppdesc);
+ status = parse_acl_blob(&blob, security_info, ppdesc);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(10, ("parse_acl_blob returned %s\n",
nt_errstr(status)));
return status;
}
if (fsp) {
- return store_acl_blob_fsp(fsp, &blob);
+ return store_acl_blob_fsp(handle, fsp, &blob);
} else {
- return store_acl_blob_pathname(handle->conn, fname, &blob);
+ return store_acl_blob_pathname(handle, fname, &blob);
}
}
return ret;
}
+/*********************************************************************
+ Fetch a security descriptor given an fsp.
+*********************************************************************/
+
static NTSTATUS fget_nt_acl_xattr(vfs_handle_struct *handle, files_struct *fsp,
uint32 security_info, struct security_descriptor **ppdesc)
{
}
return NT_STATUS_OK;
}
+
+ DEBUG(10,("fget_nt_acl_xattr: failed to get xattr sd for file %s, Error %s\n",
+ fsp->fsp_name,
+ nt_errstr(status) ));
+
return SMB_VFS_NEXT_FGET_NT_ACL(handle, fsp,
security_info, ppdesc);
}
+/*********************************************************************
+ Fetch a security descriptor given a pathname.
+*********************************************************************/
+
static NTSTATUS get_nt_acl_xattr(vfs_handle_struct *handle,
const char *name, uint32 security_info, struct security_descriptor **ppdesc)
{
}
return NT_STATUS_OK;
}
+
+ DEBUG(10,("get_nt_acl_xattr: failed to get xattr sd for file %s, Error %s\n",
+ name,
+ nt_errstr(status) ));
+
return SMB_VFS_NEXT_GET_NT_ACL(handle, name,
security_info, ppdesc);
}
+/*********************************************************************
+ Store a security descriptor given an fsp.
+*********************************************************************/
+
static NTSTATUS fset_nt_acl_xattr(vfs_handle_struct *handle, files_struct *fsp,
uint32 security_info_sent, const struct security_descriptor *psd)
{
CONST_DISCARD(struct security_descriptor *,psd));
}
create_acl_blob(psd, &blob);
- store_acl_blob_fsp(fsp, &blob);
+ store_acl_blob_fsp(handle, fsp, &blob);
return NT_STATUS_OK;
}
{SMB_VFS_OP(get_nt_acl_xattr), SMB_VFS_OP_GET_NT_ACL, SMB_VFS_LAYER_TRANSPARENT},
{SMB_VFS_OP(fset_nt_acl_xattr),SMB_VFS_OP_FSET_NT_ACL,SMB_VFS_LAYER_TRANSPARENT},
- {SMB_VFS_OP(NULL), SMB_VFS_OP_NOOP, SMB_VFS_LAYER_NOOP}
+ {SMB_VFS_OP(NULL), SMB_VFS_OP_NOOP, SMB_VFS_LAYER_NOOP}
};
NTSTATUS vfs_acl_xattr_init(void)
git.samba.org / samba.git / commitdiff