/* show legacy mount options */
unsigned int legacy_opts_show:1;
+ /*
+ * fs kills suid/sgid/cap on write/chown/trunc. suid is killed on
+ * write/trunc only if caller did not have CAP_FSETID. sgid is killed
+ * on write/truncate only if caller did not have CAP_FSETID as well as
+ * file has group execute permission.
+ */
+ unsigned handle_killpriv_v2:1;
+
/*
* The following bitfields are only for optimization purposes
* and hence races in setting them will not cause malfunction
!fuse_dax_check_alignment(fc, arg->map_alignment)) {
ok = false;
}
+ if (arg->flags & FUSE_HANDLE_KILLPRIV_V2)
+ fc->handle_killpriv_v2 = 1;
} else {
ra_pages = fc->max_read / PAGE_SIZE;
fc->no_lock = 1;
FUSE_WRITEBACK_CACHE | FUSE_NO_OPEN_SUPPORT |
FUSE_PARALLEL_DIROPS | FUSE_HANDLE_KILLPRIV | FUSE_POSIX_ACL |
FUSE_ABORT_ERROR | FUSE_MAX_PAGES | FUSE_CACHE_SYMLINKS |
- FUSE_NO_OPENDIR_SUPPORT | FUSE_EXPLICIT_INVAL_DATA;
+ FUSE_NO_OPENDIR_SUPPORT | FUSE_EXPLICIT_INVAL_DATA |
+ FUSE_HANDLE_KILLPRIV_V2;
#ifdef CONFIG_FUSE_DAX
if (fm->fc->dax)
ia->in.flags |= FUSE_MAP_ALIGNMENT;
*
* 7.32
* - add flags to fuse_attr, add FUSE_ATTR_SUBMOUNT, add FUSE_SUBMOUNTS
+ *
+ * 7.33
+ * - add FUSE_HANDLE_KILLPRIV_V2
*/
#ifndef _LINUX_FUSE_H
#define FUSE_KERNEL_VERSION 7
/** Minor version number of this interface */
-#define FUSE_KERNEL_MINOR_VERSION 32
+#define FUSE_KERNEL_MINOR_VERSION 33
/** The node ID of the root inode */
#define FUSE_ROOT_ID 1
* foffset and moffset fields in struct
* fuse_setupmapping_out and fuse_removemapping_one.
* FUSE_SUBMOUNTS: kernel supports auto-mounting directory submounts
+ * FUSE_HANDLE_KILLPRIV_V2: fs kills suid/sgid/cap on write/chown/trunc.
+ * Upon write/truncate suid/sgid is only killed if caller
+ * does not have CAP_FSETID. Additionally upon
+ * write/truncate sgid is killed only if file has group
+ * execute permission. (Same as Linux VFS behavior).
*/
#define FUSE_ASYNC_READ (1 << 0)
#define FUSE_POSIX_LOCKS (1 << 1)
#define FUSE_EXPLICIT_INVAL_DATA (1 << 25)
#define FUSE_MAP_ALIGNMENT (1 << 26)
#define FUSE_SUBMOUNTS (1 << 27)
+#define FUSE_HANDLE_KILLPRIV_V2 (1 << 28)
/**
* CUSE INIT request/reply flags