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Diffstat (limited to 'net/samba422/files/patch-source3_modules_vfs__freebsd.c')
-rw-r--r--net/samba422/files/patch-source3_modules_vfs__freebsd.c702
1 files changed, 702 insertions, 0 deletions
diff --git a/net/samba422/files/patch-source3_modules_vfs__freebsd.c b/net/samba422/files/patch-source3_modules_vfs__freebsd.c
new file mode 100644
index 000000000000..9d3e41041117
--- /dev/null
+++ b/net/samba422/files/patch-source3_modules_vfs__freebsd.c
@@ -0,0 +1,702 @@
+--- source3/modules/vfs_freebsd.c.orig 2025-07-11 10:55:17 UTC
++++ source3/modules/vfs_freebsd.c
+@@ -0,0 +1,699 @@
++/*
++ * This module implements VFS calls specific to FreeBSD
++ *
++ * Copyright (C) Timur I. Bakeyev, 2018
++ *
++ * 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 "lib/util/tevent_unix.h"
++#include "lib/util/tevent_ntstatus.h"
++#include "system/filesys.h"
++#include "smbd/smbd.h"
++
++#include <sys/sysctl.h>
++
++static int vfs_freebsd_debug_level = DBGC_VFS;
++
++#undef DBGC_CLASS
++#define DBGC_CLASS vfs_freebsd_debug_level
++
++#ifndef EXTATTR_MAXNAMELEN
++#define EXTATTR_MAXNAMELEN UINT8_MAX
++#endif
++
++#define EXTATTR_NAMESPACE(NS) EXTATTR_NAMESPACE_ ## NS, \
++ EXTATTR_NAMESPACE_ ## NS ## _STRING ".", \
++ .data.len = (sizeof(EXTATTR_NAMESPACE_ ## NS ## _STRING ".") - 1)
++
++#define EXTATTR_EMPTY 0x00
++#define EXTATTR_USER 0x01
++#define EXTATTR_SYSTEM 0x02
++#define EXTATTR_SECURITY 0x03
++#define EXTATTR_TRUSTED 0x04
++
++enum extattr_mode {
++ FREEBSD_EXTATTR_SECURE,
++ FREEBSD_EXTATTR_COMPAT,
++ FREEBSD_EXTATTR_LEGACY
++};
++
++struct freebsd_handle_data {
++ enum extattr_mode extattr_mode;
++};
++
++typedef struct {
++ int namespace;
++ char name[EXTATTR_MAXNAMELEN+1];
++ union {
++ uint16_t len;
++ uint16_t flags;
++ } data;
++} extattr_attr;
++
++static const struct enum_list extattr_mode_param[] = {
++ { FREEBSD_EXTATTR_SECURE, "secure" }, /* */
++ { FREEBSD_EXTATTR_COMPAT, "compat" }, /* */
++ { FREEBSD_EXTATTR_LEGACY, "legacy" }, /* */
++ { -1, NULL }
++};
++
++/* XXX: This order doesn't match namespace ids order! */
++static extattr_attr extattr[] = {
++ { EXTATTR_NAMESPACE(EMPTY) },
++ { EXTATTR_NAMESPACE(SYSTEM) },
++ { EXTATTR_NAMESPACE(USER) },
++};
++
++
++static bool freebsd_in_jail(void) {
++ int val = 0;
++ size_t val_len = sizeof(val);
++
++ if((sysctlbyname("security.jail.jailed", &val, &val_len, NULL, 0) != -1) && val == 1) {
++ return true;
++ }
++ return false;
++}
++
++
++static uint16_t freebsd_map_attrname(const char *name)
++{
++ if(name == NULL || name[0] == '\0') {
++ return EXTATTR_EMPTY;
++ }
++
++ switch(name[0]) {
++ case 'u':
++ if(strncmp(name, "user.", 5) == 0)
++ return EXTATTR_USER;
++ break;
++ case 't':
++ if(strncmp(name, "trusted.", 8) == 0)
++ return EXTATTR_TRUSTED;
++ break;
++ case 's':
++ /* name[1] could be any character, including '\0' */
++ switch(name[1]) {
++ case 'e':
++ if(strncmp(name, "security.", 9) == 0)
++ return EXTATTR_SECURITY;
++ break;
++ case 'y':
++ if(strncmp(name, "system.", 7) == 0)
++ return EXTATTR_SYSTEM;
++ break;
++ }
++ break;
++ }
++ return EXTATTR_USER;
++}
++
++
++/* security, system, trusted or user */
++static extattr_attr* freebsd_map_xattr(enum extattr_mode extattr_mode, const char *name, extattr_attr *attr)
++{
++ int attrnamespace = EXTATTR_NAMESPACE_EMPTY;
++ const char *p, *attrname = name;
++
++ if(name == NULL || name[0] == '\0') {
++ return NULL;
++ }
++
++ if(attr == NULL) {
++ return NULL;
++ }
++
++ uint16_t flags = freebsd_map_attrname(name);
++
++ switch(flags) {
++ case EXTATTR_SECURITY:
++ case EXTATTR_TRUSTED:
++ case EXTATTR_SYSTEM:
++ attrnamespace = (extattr_mode == FREEBSD_EXTATTR_SECURE) ?
++ EXTATTR_NAMESPACE_SYSTEM :
++ EXTATTR_NAMESPACE_USER;
++ break;
++ case EXTATTR_USER:
++ attrnamespace = EXTATTR_NAMESPACE_USER;
++ break;
++ default:
++ /* Default to "user" namespace if nothing else was specified */
++ attrnamespace = EXTATTR_NAMESPACE_USER;
++ flags = EXTATTR_USER;
++ break;
++ }
++
++ if (extattr_mode == FREEBSD_EXTATTR_LEGACY) {
++ switch(flags) {
++ case EXTATTR_SECURITY:
++ attrname = name + 9;
++ break;
++ case EXTATTR_TRUSTED:
++ attrname = name + 8;
++ break;
++ case EXTATTR_SYSTEM:
++ attrname = name + 7;
++ break;
++ case EXTATTR_USER:
++ attrname = name + 5;
++ break;
++ default:
++ attrname = ((p=strchr(name, '.')) != NULL) ? p + 1 : name;
++ break;
++ }
++ }
++
++ attr->namespace = attrnamespace;
++ attr->data.flags = flags;
++ strlcpy(attr->name, attrname, EXTATTR_MAXNAMELEN + 1);
++
++ return attr;
++}
++
++
++static ssize_t extattr_size(struct files_struct *fsp, extattr_attr *attr)
++{
++ ssize_t result;
++
++ SMB_ASSERT(!fsp_is_alternate_stream(fsp));
++
++ int fd = fsp_get_pathref_fd(fsp);
++
++ if (fsp->fsp_flags.is_pathref) {
++ const char *path = fsp->fsp_name->base_name;
++ if (fsp->fsp_flags.have_proc_fds) {
++ char buf[PATH_MAX];
++ path = sys_proc_fd_path(fd, &buf);
++ if (path == NULL) {
++ return -1;
++ }
++ }
++ /*
++ * This is no longer a handle based call.
++ */
++ return extattr_get_file(path, attr->namespace, attr->name, NULL, 0);
++ }
++ else {
++ return extattr_get_fd(fd, attr->namespace, attr->name, NULL, 0);
++ }
++}
++
++/*
++ * The list of names is returned as an unordered array of NULL-terminated
++ * character strings (attribute names are separated by NULL characters),
++ * like this:
++ * user.name1\0system.name1\0user.name2\0
++ *
++ * Filesystems like ext2, ext3 and XFS which implement POSIX ACLs using
++ * extended attributes, might return a list like this:
++ * system.posix_acl_access\0system.posix_acl_default\0
++ */
++/*
++ * The extattr_list_file() returns a list of attributes present in the
++ * requested namespace. Each list entry consists of a single byte containing
++ * the length of the attribute name, followed by the attribute name. The
++ * attribute name is not terminated by ASCII 0 (nul).
++*/
++static ssize_t freebsd_extattr_list(struct files_struct *fsp, enum extattr_mode extattr_mode, char *list, size_t size)
++{
++ ssize_t list_size, total_size = 0;
++ char *p, *q, *list_end;
++ int len;
++ /*
++ Ignore all but user namespace when we are not root or in jail
++ See: https://bugzilla.samba.org/show_bug.cgi?id=10247
++ */
++ bool as_root = (geteuid() == 0);
++
++ int ns = (extattr_mode == FREEBSD_EXTATTR_SECURE && as_root) ? 1 : 2;
++
++ int fd = fsp_get_pathref_fd(fsp);
++
++ /* Iterate through extattr(2) namespaces */
++ for(; ns < ARRAY_SIZE(extattr); ns++) {
++ list_size = -1;
++
++ if (fsp->fsp_flags.is_pathref) {
++ const char *path = fsp->fsp_name->base_name;
++ if (fsp->fsp_flags.have_proc_fds) {
++ char buf[PATH_MAX];
++ path = sys_proc_fd_path(fd, &buf);
++ if (path == NULL) {
++ return -1;
++ }
++ }
++ /*
++ * This is no longer a handle based call.
++ */
++ list_size = extattr_list_file(path, extattr[ns].namespace, list, size);
++ }
++ else {
++ list_size = extattr_list_fd(fd, extattr[ns].namespace, list, size);
++ }
++ /* Some error happend. Errno should be set by the previous call */
++ if(list_size < 0)
++ return -1;
++ /* No attributes in this namespace */
++ if(list_size == 0)
++ continue;
++ /*
++ Call with an empty buffer may be used to calculate
++ necessary buffer size.
++ */
++ if(list == NULL) {
++ /*
++ XXX: Unfortunately, we can't say, how many attributes were
++ returned, so here is the potential problem with the emulation.
++ */
++ if(extattr_mode == FREEBSD_EXTATTR_LEGACY) {
++ /*
++ Take the worse case of one char attribute names -
++ two bytes per name plus one more for sanity.
++ */
++ total_size += list_size + (list_size/2 + 1)*extattr[ns].data.len;
++ }
++ else {
++ total_size += list_size;
++ }
++ continue;
++ }
++
++ if(extattr_mode == FREEBSD_EXTATTR_LEGACY) {
++ /* Count necessary offset to fit namespace prefixes */
++ int extra_len = 0;
++ uint16_t flags;
++ list_end = list + list_size;
++ for(list_size = 0, p = q = list; p < list_end; p += len) {
++ len = p[0] + 1;
++ (void)strlcpy(q, p + 1, len);
++ flags = freebsd_map_attrname(q);
++ /* Skip secure attributes for non-root user */
++ if(extattr_mode != FREEBSD_EXTATTR_SECURE && !as_root && flags > EXTATTR_USER) {
++ continue;
++ }
++ if(flags <= EXTATTR_USER) {
++ /* Don't count trailing '\0' */
++ extra_len += extattr[ns].data.len;
++ }
++ list_size += len;
++ q += len;
++ }
++ total_size += list_size + extra_len;
++ /* Buffer is too small to fit the results */
++ if(total_size > size) {
++ errno = ERANGE;
++ return -1;
++ }
++ /* Shift results backwards, so we can prepend prefixes */
++ list_end = list + extra_len;
++ p = (char*)memmove(list_end, list, list_size);
++ /*
++ We enter the loop with `p` pointing to the shifted list and
++ `extra_len` having the total margin between `list` and `p`
++ */
++ for(list_end += list_size; p < list_end; p += len) {
++ len = strlen(p) + 1;
++ flags = freebsd_map_attrname(p);
++ if(flags <= EXTATTR_USER) {
++ /* Add namespace prefix */
++ (void)strncpy(list, extattr[ns].name, extattr[ns].data.len);
++ list += extattr[ns].data.len;
++ }
++ /* Append attribute name */
++ (void)strlcpy(list, p, len);
++ list += len;
++ }
++ }
++ else {
++ /* Convert UCSD strings into nul-terminated strings */
++ for(list_end = list + list_size; list < list_end; list += len) {
++ len = list[0] + 1;
++ (void)strlcpy(list, list + 1, len);
++ }
++ total_size += list_size;
++ }
++ }
++ return total_size;
++}
++
++/*
++static ssize_t freebsd_fgetxattr_size(struct vfs_handle_struct *handle,
++ struct files_struct *fsp,
++ const char *name)
++{
++ struct freebsd_handle_data *data;
++ extattr_attr attr;
++
++ SMB_ASSERT(!fsp_is_alternate_stream(fsp));
++
++ SMB_VFS_HANDLE_GET_DATA(handle, data,
++ struct freebsd_handle_data,
++ return -1);
++
++ if(!freebsd_map_xattr(data->extattr_mode, name, &attr)) {
++ errno = EINVAL;
++ return -1;
++ }
++
++ if(data->extattr_mode != FREEBSD_EXTATTR_SECURE && geteuid() != 0 && attr.data.flags > EXTATTR_USER) {
++ errno = ENOATTR;
++ return -1;
++ }
++
++ return extattr_size(fsp, &attr);
++}
++*/
++
++/* VFS entries */
++static ssize_t freebsd_fgetxattr(struct vfs_handle_struct *handle,
++ struct files_struct *fsp,
++ const char *name,
++ void *value,
++ size_t size)
++{
++#if defined(HAVE_XATTR_EXTATTR)
++ struct freebsd_handle_data *data;
++ extattr_attr attr;
++ ssize_t res;
++ int fd;
++
++ SMB_ASSERT(!fsp_is_alternate_stream(fsp));
++
++ SMB_VFS_HANDLE_GET_DATA(handle, data,
++ struct freebsd_handle_data,
++ return -1);
++
++ if(!freebsd_map_xattr(data->extattr_mode, name, &attr)) {
++ errno = EINVAL;
++ return -1;
++ }
++
++ /* Filter out 'secure' entries */
++ if(data->extattr_mode != FREEBSD_EXTATTR_SECURE && geteuid() != 0 && attr.data.flags > EXTATTR_USER) {
++ errno = ENOATTR;
++ return -1;
++ }
++
++ /*
++ * The BSD implementation has a nasty habit of silently truncating
++ * the returned value to the size of the buffer, so we have to check
++ * that the buffer is large enough to fit the returned value.
++ */
++ if((res=extattr_size(fsp, &attr)) < 0) {
++ return -1;
++ }
++
++ if (size == 0) {
++ return res;
++ }
++ else if (res > size) {
++ errno = ERANGE;
++ return -1;
++ }
++
++ fd = fsp_get_pathref_fd(fsp);
++
++ if (fsp->fsp_flags.is_pathref) {
++ const char *path = fsp->fsp_name->base_name;
++ if (fsp->fsp_flags.have_proc_fds) {
++ char buf[PATH_MAX];
++ path = sys_proc_fd_path(fd, &buf);
++ if (path == NULL) {
++ return -1;
++ }
++ }
++ /*
++ * This is no longer a handle based call.
++ */
++ return extattr_get_file(path, attr.namespace, attr.name, value, size);
++ }
++ else {
++ return extattr_get_fd(fd, attr.namespace, attr.name, value, size);
++ }
++ return -1;
++#else
++ errno = ENOSYS;
++ return -1;
++#endif
++}
++
++
++static ssize_t freebsd_flistxattr(struct vfs_handle_struct *handle,
++ struct files_struct *fsp,
++ char *list,
++ size_t size)
++{
++#if defined(HAVE_XATTR_EXTATTR)
++ struct freebsd_handle_data *data;
++
++ SMB_ASSERT(!fsp_is_alternate_stream(fsp));
++
++ SMB_VFS_HANDLE_GET_DATA(handle, data,
++ struct freebsd_handle_data,
++ return -1);
++
++ return freebsd_extattr_list(fsp, data->extattr_mode, list, size);
++#else
++ errno = ENOSYS;
++ return -1;
++#endif
++}
++
++
++static int freebsd_fremovexattr(struct vfs_handle_struct *handle,
++ struct files_struct *fsp,
++ const char *name)
++{
++#if defined(HAVE_XATTR_EXTATTR)
++ struct freebsd_handle_data *data;
++ extattr_attr attr;
++ int fd;
++
++ SMB_ASSERT(!fsp_is_alternate_stream(fsp));
++
++ SMB_VFS_HANDLE_GET_DATA(handle, data,
++ struct freebsd_handle_data,
++ return -1);
++
++ if(!freebsd_map_xattr(data->extattr_mode, name, &attr)) {
++ errno = EINVAL;
++ return -1;
++ }
++
++ /* Filter out 'secure' entries */
++ if(data->extattr_mode != FREEBSD_EXTATTR_SECURE && geteuid() != 0 && attr.data.flags > EXTATTR_USER) {
++ errno = ENOATTR;
++ return -1;
++ }
++
++ fd = fsp_get_pathref_fd(fsp);
++
++ if (fsp->fsp_flags.is_pathref) {
++ const char *path = fsp->fsp_name->base_name;
++ if (fsp->fsp_flags.have_proc_fds) {
++ char buf[PATH_MAX];
++ path = sys_proc_fd_path(fd, &buf);
++ if (path == NULL) {
++ return -1;
++ }
++ }
++ /*
++ * This is no longer a handle based call.
++ */
++ return extattr_delete_file(path, attr.namespace, attr.name);
++ }
++ else {
++ return extattr_delete_fd(fd, attr.namespace, attr.name);
++ }
++ return -1;
++#else
++ errno = ENOSYS;
++ return -1;
++#endif
++}
++
++
++static int freebsd_fsetxattr(struct vfs_handle_struct *handle,
++ struct files_struct *fsp,
++ const char *name,
++ const void *value,
++ size_t size,
++ int flags)
++{
++#if defined(HAVE_XATTR_EXTATTR)
++ struct freebsd_handle_data *data;
++ extattr_attr attr;
++ ssize_t res;
++ int fd;
++
++ SMB_ASSERT(!fsp_is_alternate_stream(fsp));
++
++ SMB_VFS_HANDLE_GET_DATA(handle, data,
++ struct freebsd_handle_data,
++ return -1);
++
++ if(!freebsd_map_xattr(data->extattr_mode, name, &attr)) {
++ errno = EINVAL;
++ return -1;
++ }
++
++ /* Filter out 'secure' entries */
++ if(data->extattr_mode != FREEBSD_EXTATTR_SECURE && geteuid() != 0 && attr.data.flags > EXTATTR_USER) {
++ errno = ENOATTR;
++ return -1;
++ }
++
++ if (flags) {
++ /* Check attribute existence */
++ res = extattr_size(fsp, &attr);
++ if (res < 0) {
++ /* REPLACE attribute, that doesn't exist */
++ if ((flags & XATTR_REPLACE) && errno == ENOATTR) {
++ errno = ENOATTR;
++ return -1;
++ }
++ /* Ignore other errors */
++ }
++ else {
++ /* CREATE attribute, that already exists */
++ if (flags & XATTR_CREATE) {
++ errno = EEXIST;
++ return -1;
++ }
++ }
++ }
++
++ fd = fsp_get_pathref_fd(fsp);
++
++ if (fsp->fsp_flags.is_pathref) {
++ const char *path = fsp->fsp_name->base_name;
++ if (fsp->fsp_flags.have_proc_fds) {
++ char buf[PATH_MAX];
++ path = sys_proc_fd_path(fd, &buf);
++ if (path == NULL) {
++ return -1;
++ }
++ }
++ /*
++ * This is no longer a handle based call.
++ */
++ res = extattr_set_file(path, attr.namespace, attr.name, value, size);
++ }
++ else {
++ res = extattr_set_fd(fd, attr.namespace, attr.name, value, size);
++ }
++ return (res >= 0) ? 0 : -1;
++#else
++ errno = ENOSYS;
++ return -1;
++#endif
++}
++
++
++static int freebsd_connect(struct vfs_handle_struct *handle,
++ const char *service,
++ const char *user)
++{
++ struct freebsd_handle_data *data;
++ int enumval, saved_errno;
++
++ int ret = SMB_VFS_NEXT_CONNECT(handle, service, user);
++
++ if (ret < 0) {
++ return ret;
++ }
++
++ data = talloc_zero(handle->conn, struct freebsd_handle_data);
++ if (!data) {
++ saved_errno = errno;
++ SMB_VFS_NEXT_DISCONNECT(handle);
++ DEBUG(0, ("talloc_zero() failed\n"));
++ errno = saved_errno;
++ return -1;
++ }
++
++ enumval = lp_parm_enum(SNUM(handle->conn), "freebsd",
++ "extattr mode", extattr_mode_param, FREEBSD_EXTATTR_LEGACY);
++ if (enumval == -1) {
++ saved_errno = errno;
++ SMB_VFS_NEXT_DISCONNECT(handle);
++ DBG_DEBUG("value for freebsd: 'extattr mode' is unknown\n");
++ errno = saved_errno;
++ return -1;
++ }
++
++ if(freebsd_in_jail()) {
++ enumval = FREEBSD_EXTATTR_COMPAT;
++ DBG_WARNING("running in jail, enforcing 'compat' mode\n");
++ }
++
++ data->extattr_mode = (enum extattr_mode)enumval;
++
++ SMB_VFS_HANDLE_SET_DATA(handle, data, NULL,
++ struct freebsd_handle_data,
++ return -1);
++
++ DBG_DEBUG("connect to service[%s] with '%s' extattr mode\n",
++ service, extattr_mode_param[data->extattr_mode].name);
++
++ return 0;
++}
++
++
++static void freebsd_disconnect(vfs_handle_struct *handle)
++{
++ SMB_VFS_NEXT_DISCONNECT(handle);
++}
++
++/* VFS operations structure */
++
++struct vfs_fn_pointers freebsd_fns = {
++ /* Disk operations */
++ .connect_fn = freebsd_connect,
++ .disconnect_fn = freebsd_disconnect,
++
++ /* EA operations. */
++ .getxattrat_send_fn = vfs_not_implemented_getxattrat_send,
++ .getxattrat_recv_fn = vfs_not_implemented_getxattrat_recv,
++ .fgetxattr_fn = freebsd_fgetxattr,
++ .flistxattr_fn = freebsd_flistxattr,
++ .fremovexattr_fn = freebsd_fremovexattr,
++ .fsetxattr_fn = freebsd_fsetxattr,
++};
++
++static_decl_vfs;
++NTSTATUS vfs_freebsd_init(TALLOC_CTX *ctx)
++{
++ NTSTATUS ret;
++
++ ret = smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "freebsd",
++ &freebsd_fns);
++
++ if (!NT_STATUS_IS_OK(ret)) {
++ return ret;
++ }
++
++ vfs_freebsd_debug_level = debug_add_class("freebsd");
++ if (vfs_freebsd_debug_level == -1) {
++ vfs_freebsd_debug_level = DBGC_VFS;
++ DEBUG(0, ("vfs_freebsd: Couldn't register custom debugging class!\n"));
++ } else {
++ DEBUG(10, ("vfs_freebsd: Debug class number of 'fileid': %d\n", vfs_freebsd_debug_level));
++ }
++
++ return ret;
++}
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