#include "librpc/gen_ndr/xattr.h"
#include "auth.h"
#include "vfs_acl_common.h"
+#include "lib/util/tevent_ntstatus.h"
+#include "lib/util/tevent_unix.h"
/* Pull in the common functions. */
#define ACL_MODULE_NAME "acl_xattr"
static ssize_t getxattr_do(vfs_handle_struct *handle,
files_struct *fsp,
- const struct smb_filename *smb_fname,
const char *xattr_name,
uint8_t *val,
size_t size)
int saved_errno = 0;
become_root();
- if (fsp && fsp->fh->fd != -1) {
- sizeret = SMB_VFS_FGETXATTR(fsp, xattr_name, val, size);
- } else {
- sizeret = SMB_VFS_GETXATTR(handle->conn, smb_fname,
- XATTR_NTACL_NAME, val, size);
- }
+ sizeret = SMB_VFS_FGETXATTR(fsp, xattr_name, val, size);
if (sizeret == -1) {
saved_errno = errno;
}
val = tmp;
sizeret =
- getxattr_do(handle, fsp, NULL, XATTR_NTACL_NAME, val, size);
+ getxattr_do(handle, fsp, XATTR_NTACL_NAME, val, size);
if (sizeret >= 0) {
pblob->data = val;
/* Too small, try again. */
sizeret =
- getxattr_do(handle, fsp, NULL, XATTR_NTACL_NAME, NULL, 0);
- if (sizeret < 0) {
- goto err;
- }
-
- if (size < sizeret) {
- size = sizeret;
- }
-
- if (size > 65536) {
- /* Max ACL size is 65536 bytes. */
- errno = ERANGE;
- goto err;
- }
-
- goto again;
- err:
- /* Real error - exit here. */
- TALLOC_FREE(val);
- return map_nt_error_from_unix(errno);
-}
-
-static NTSTATUS get_acl_blob(TALLOC_CTX *ctx,
- vfs_handle_struct *handle,
- const struct smb_filename *smb_fname,
- DATA_BLOB *pblob)
-{
- size_t size = 4096;
- uint8_t *val = NULL;
- uint8_t *tmp;
- ssize_t sizeret;
-
- ZERO_STRUCTP(pblob);
-
- again:
-
- tmp = talloc_realloc(ctx, val, uint8_t, size);
- if (tmp == NULL) {
- TALLOC_FREE(val);
- return NT_STATUS_NO_MEMORY;
- }
- val = tmp;
-
- sizeret =
- getxattr_do(handle, NULL, smb_fname, XATTR_NTACL_NAME, val, size);
-
- if (sizeret >= 0) {
- pblob->data = val;
- pblob->length = sizeret;
- return NT_STATUS_OK;
- }
-
- if (errno != ERANGE) {
- goto err;
- }
-
- /* Too small, try again. */
- sizeret =
- getxattr_do(handle, NULL, smb_fname, XATTR_NTACL_NAME, NULL, 0);
+ getxattr_do(handle, fsp, XATTR_NTACL_NAME, NULL, 0);
if (sizeret < 0) {
goto err;
}
(unsigned int)pblob->length, fsp_str_dbg(fsp)));
become_root();
- if (fsp->fh->fd != -1) {
- ret = SMB_VFS_FSETXATTR(fsp, XATTR_NTACL_NAME,
+ ret = SMB_VFS_FSETXATTR(fsp, XATTR_NTACL_NAME,
pblob->data, pblob->length, 0);
- } else {
- ret = SMB_VFS_SETXATTR(fsp->conn, fsp->fsp_name,
- XATTR_NTACL_NAME,
- pblob->data, pblob->length, 0);
- }
if (ret) {
saved_errno = errno;
}
Remove a Windows ACL - we're setting the underlying POSIX ACL.
*********************************************************************/
-static int sys_acl_set_file_xattr(vfs_handle_struct *handle,
- const struct smb_filename *smb_fname,
+static int sys_acl_set_fd_xattr(vfs_handle_struct *handle,
+ files_struct *fsp,
SMB_ACL_TYPE_T type,
SMB_ACL_T theacl)
{
- int ret = SMB_VFS_NEXT_SYS_ACL_SET_FILE(handle,
- smb_fname,
- type,
- theacl);
+ struct acl_common_fsp_ext *ext = (struct acl_common_fsp_ext *)
+ VFS_FETCH_FSP_EXTENSION(handle, fsp);
+ int ret;
+
+ ret = SMB_VFS_NEXT_SYS_ACL_SET_FD(handle,
+ fsp,
+ type,
+ theacl);
if (ret == -1) {
return -1;
}
- become_root();
- SMB_VFS_REMOVEXATTR(handle->conn, smb_fname,
- XATTR_NTACL_NAME);
- unbecome_root();
-
- return ret;
-}
-
-/*********************************************************************
- Remove a Windows ACL - we're setting the underlying POSIX ACL.
-*********************************************************************/
-
-static int sys_acl_set_fd_xattr(vfs_handle_struct *handle,
- files_struct *fsp,
- SMB_ACL_T theacl)
-{
- int ret = SMB_VFS_NEXT_SYS_ACL_SET_FD(handle,
- fsp,
- theacl);
- if (ret == -1) {
- return -1;
+ if (ext != NULL && ext->setting_nt_acl) {
+ return 0;
}
become_root();
SMB_VFS_FREMOVEXATTR(fsp, XATTR_NTACL_NAME);
unbecome_root();
- return ret;
+ return 0;
}
static int connect_acl_xattr(struct vfs_handle_struct *handle,
const char *service,
const char *user)
{
+ const char *security_acl_xattr_name = NULL;
int ret = SMB_VFS_NEXT_CONNECT(handle, service, user);
bool ok;
struct acl_common_config *config = NULL;
"yes");
}
+ security_acl_xattr_name = lp_parm_const_string(SNUM(handle->conn),
+ "acl_xattr",
+ "security_acl_name",
+ NULL);
+ if (security_acl_xattr_name != NULL) {
+ config->security_acl_xattr_name = talloc_strdup(config, security_acl_xattr_name);
+ if (config->security_acl_xattr_name == NULL) {
+ return -1;
+ }
+ }
+
return 0;
}
return status;
}
-static NTSTATUS acl_xattr_get_nt_acl(vfs_handle_struct *handle,
- const struct smb_filename *smb_fname,
- uint32_t security_info,
- TALLOC_CTX *mem_ctx,
- struct security_descriptor **ppdesc)
-{
- NTSTATUS status;
- status = get_nt_acl_common(get_acl_blob, handle, smb_fname,
- security_info, mem_ctx, ppdesc);
- return status;
-}
-
static NTSTATUS acl_xattr_fset_nt_acl(vfs_handle_struct *handle,
files_struct *fsp,
uint32_t security_info_sent,
return status;
}
+struct acl_xattr_getxattrat_state {
+ struct vfs_aio_state aio_state;
+ ssize_t xattr_size;
+ uint8_t *xattr_value;
+};
+
+static void acl_xattr_getxattrat_done(struct tevent_req *subreq);
+
+static struct tevent_req *acl_xattr_getxattrat_send(
+ TALLOC_CTX *mem_ctx,
+ struct tevent_context *ev,
+ struct vfs_handle_struct *handle,
+ files_struct *dirfsp,
+ const struct smb_filename *smb_fname,
+ const char *xattr_name,
+ size_t alloc_hint)
+{
+ struct tevent_req *req = NULL;
+ struct tevent_req *subreq = NULL;
+ struct acl_xattr_getxattrat_state *state = NULL;
+ struct acl_common_config *config = NULL;
+
+ SMB_VFS_HANDLE_GET_DATA(handle, config,
+ struct acl_common_config,
+ return NULL);
+
+ req = tevent_req_create(mem_ctx, &state,
+ struct acl_xattr_getxattrat_state);
+ if (req == NULL) {
+ return NULL;
+ }
+
+ if (strequal(xattr_name, config->security_acl_xattr_name)) {
+ tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
+ return tevent_req_post(req, ev);
+ }
+ if (config->security_acl_xattr_name != NULL &&
+ strequal(xattr_name, XATTR_NTACL_NAME))
+ {
+ xattr_name = config->security_acl_xattr_name;
+ }
+
+ subreq = SMB_VFS_NEXT_GETXATTRAT_SEND(state,
+ ev,
+ handle,
+ dirfsp,
+ smb_fname,
+ xattr_name,
+ alloc_hint);
+ if (tevent_req_nomem(subreq, req)) {
+ return tevent_req_post(req, ev);
+ }
+ tevent_req_set_callback(subreq, acl_xattr_getxattrat_done, req);
+
+ return req;
+}
+
+static void acl_xattr_getxattrat_done(struct tevent_req *subreq)
+{
+ struct tevent_req *req = tevent_req_callback_data(
+ subreq, struct tevent_req);
+ struct acl_xattr_getxattrat_state *state = tevent_req_data(
+ req, struct acl_xattr_getxattrat_state);
+
+ state->xattr_size = SMB_VFS_NEXT_GETXATTRAT_RECV(subreq,
+ &state->aio_state,
+ state,
+ &state->xattr_value);
+ TALLOC_FREE(subreq);
+ if (state->xattr_size == -1) {
+ tevent_req_error(req, state->aio_state.error);
+ return;
+ }
+
+ tevent_req_done(req);
+}
+
+static ssize_t acl_xattr_getxattrat_recv(struct tevent_req *req,
+ struct vfs_aio_state *aio_state,
+ TALLOC_CTX *mem_ctx,
+ uint8_t **xattr_value)
+{
+ struct acl_xattr_getxattrat_state *state = tevent_req_data(
+ req, struct acl_xattr_getxattrat_state);
+ ssize_t xattr_size;
+
+ if (tevent_req_is_unix_error(req, &aio_state->error)) {
+ tevent_req_received(req);
+ return -1;
+ }
+
+ *aio_state = state->aio_state;
+ xattr_size = state->xattr_size;
+ if (xattr_value != NULL) {
+ *xattr_value = talloc_move(mem_ctx, &state->xattr_value);
+ }
+
+ tevent_req_received(req);
+ return xattr_size;
+}
+
+static ssize_t acl_xattr_fgetxattr(struct vfs_handle_struct *handle,
+ struct files_struct *fsp,
+ const char *name,
+ void *value,
+ size_t size)
+{
+ struct acl_common_config *config = NULL;
+
+ SMB_VFS_HANDLE_GET_DATA(handle, config,
+ struct acl_common_config,
+ return -1);
+
+ if (strequal(name, config->security_acl_xattr_name)) {
+ errno = EACCES;
+ return -1;
+ }
+ if (config->security_acl_xattr_name != NULL &&
+ strequal(name, XATTR_NTACL_NAME))
+ {
+ name = config->security_acl_xattr_name;
+ }
+
+ return SMB_VFS_NEXT_FGETXATTR(handle, fsp, name, value, size);
+}
+
+static ssize_t acl_xattr_flistxattr(struct vfs_handle_struct *handle,
+ struct files_struct *fsp,
+ char *listbuf,
+ size_t bufsize)
+{
+ struct acl_common_config *config = NULL;
+ ssize_t size;
+ char *p = NULL;
+ size_t nlen, consumed;
+
+ SMB_VFS_HANDLE_GET_DATA(handle, config,
+ struct acl_common_config,
+ return -1);
+
+ size = SMB_VFS_NEXT_FLISTXATTR(handle, fsp, listbuf, bufsize);
+ if (size < 0) {
+ return -1;
+ }
+
+ p = listbuf;
+ while (p - listbuf < size) {
+ nlen = strlen(p) + 1;
+ if (strequal(p, config->security_acl_xattr_name)) {
+ break;
+ }
+ p += nlen;
+ }
+ if (p - listbuf >= size) {
+ /* No match */
+ return size;
+ }
+
+ /*
+ * The consumed helper variable just makes the math
+ * a bit more digestible.
+ */
+ consumed = p - listbuf;
+ if (consumed + nlen < size) {
+ /* If not the last name move, else just skip */
+ memmove(p, p + nlen, size - consumed - nlen);
+ }
+ size -= nlen;
+
+ return size;
+}
+
+static int acl_xattr_fremovexattr(struct vfs_handle_struct *handle,
+ struct files_struct *fsp,
+ const char *name)
+{
+ struct acl_common_config *config = NULL;
+
+ SMB_VFS_HANDLE_GET_DATA(handle, config,
+ struct acl_common_config,
+ return -1);
+
+ if (strequal(name, config->security_acl_xattr_name)) {
+ errno = EACCES;
+ return -1;
+ }
+ if (config->security_acl_xattr_name != NULL &&
+ strequal(name, XATTR_NTACL_NAME))
+ {
+ name = config->security_acl_xattr_name;
+ }
+
+ return SMB_VFS_NEXT_FREMOVEXATTR(handle, fsp, name);
+}
+
+static int acl_xattr_fsetxattr(struct vfs_handle_struct *handle,
+ struct files_struct *fsp,
+ const char *name,
+ const void *value,
+ size_t size,
+ int flags)
+{
+ struct acl_common_config *config = NULL;
+
+ SMB_VFS_HANDLE_GET_DATA(handle, config,
+ struct acl_common_config,
+ return -1);
+
+ if (strequal(name, config->security_acl_xattr_name)) {
+ errno = EACCES;
+ return -1;
+ }
+ if (config->security_acl_xattr_name != NULL &&
+ strequal(name, XATTR_NTACL_NAME))
+ {
+ name = config->security_acl_xattr_name;
+ }
+
+ return SMB_VFS_NEXT_FSETXATTR(handle, fsp, name, value, size, flags);
+}
+
static struct vfs_fn_pointers vfs_acl_xattr_fns = {
.connect_fn = connect_acl_xattr,
.unlinkat_fn = acl_xattr_unlinkat,
- .chmod_fn = chmod_acl_module_common,
.fchmod_fn = fchmod_acl_module_common,
.fget_nt_acl_fn = acl_xattr_fget_nt_acl,
- .get_nt_acl_fn = acl_xattr_get_nt_acl,
.fset_nt_acl_fn = acl_xattr_fset_nt_acl,
- .sys_acl_set_file_fn = sys_acl_set_file_xattr,
- .sys_acl_set_fd_fn = sys_acl_set_fd_xattr
+ .sys_acl_set_fd_fn = sys_acl_set_fd_xattr,
+ .getxattrat_send_fn = acl_xattr_getxattrat_send,
+ .getxattrat_recv_fn = acl_xattr_getxattrat_recv,
+ .fgetxattr_fn = acl_xattr_fgetxattr,
+ .flistxattr_fn = acl_xattr_flistxattr,
+ .fremovexattr_fn = acl_xattr_fremovexattr,
+ .fsetxattr_fn = acl_xattr_fsetxattr,
};
static_decl_vfs;
git.samba.org / samba.git / blobdiff