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fuse update for 5.11

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Merge tag 'fuse-update-5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse

Pull fuse updates from Miklos Szeredi:

 - Improve performance of virtio-fs in mixed read/write workloads

 - Try to revalidate cache before returning EEXIST on exclusive create

 - Add a couple of miscellaneous bug fixes as well as some code cleanups

* tag 'fuse-update-5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse:
  fuse: fix bad inode
  fuse: support SB_NOSEC flag to improve write performance
  fuse: add a flag FUSE_OPEN_KILL_SUIDGID for open() request
  fuse: don't send ATTR_MODE to kill suid/sgid for handle_killpriv_v2
  fuse: setattr should set FATTR_KILL_SUIDGID
  fuse: set FUSE_WRITE_KILL_SUIDGID in cached write path
  fuse: rename FUSE_WRITE_KILL_PRIV to FUSE_WRITE_KILL_SUIDGID
  fuse: introduce the notion of FUSE_HANDLE_KILLPRIV_V2
  fuse: always revalidate if exclusive create
  virtiofs: clean up error handling in virtio_fs_get_tree()
  fuse: add fuse_sb_destroy() helper
  fuse: simplify get_fuse_conn*()
  fuse: get rid of fuse_mount refcount
  virtiofs: simplify sb setup
  virtiofs fix leak in setup
  fuse: launder page should wait for page writeback
This commit is contained in:
Linus Torvalds 2020-12-17 11:34:25 -08:00
commit 65de0b89d7
9 changed files with 195 additions and 104 deletions
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30
include/uapi/linux/fuse.h
View file

@ -175,6 +175,10 @@
*
* 7.32
* - add flags to fuse_attr, add FUSE_ATTR_SUBMOUNT, add FUSE_SUBMOUNTS
*
* 7.33
* - add FUSE_HANDLE_KILLPRIV_V2, FUSE_WRITE_KILL_SUIDGID, FATTR_KILL_SUIDGID
* - add FUSE_OPEN_KILL_SUIDGID
*/
#ifndef _LINUX_FUSE_H
@ -210,7 +214,7 @@
#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
@ -271,6 +275,7 @@ struct fuse_file_lock {
#define FATTR_MTIME_NOW (1 << 8)
#define FATTR_LOCKOWNER (1 << 9)
#define FATTR_CTIME (1 << 10)
#define FATTR_KILL_SUIDGID (1 << 11)
/**
* Flags returned by the OPEN request
@ -320,6 +325,11 @@ struct fuse_file_lock {
* 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)
@ -349,6 +359,7 @@ struct fuse_file_lock {
#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
@ -378,11 +389,14 @@ struct fuse_file_lock {
*
* FUSE_WRITE_CACHE: delayed write from page cache, file handle is guessed
* FUSE_WRITE_LOCKOWNER: lock_owner field is valid
* FUSE_WRITE_KILL_PRIV: kill suid and sgid bits
* FUSE_WRITE_KILL_SUIDGID: kill suid and sgid bits
*/
#define FUSE_WRITE_CACHE (1 << 0)
#define FUSE_WRITE_LOCKOWNER (1 << 1)
#define FUSE_WRITE_KILL_PRIV (1 << 2)
#define FUSE_WRITE_KILL_SUIDGID (1 << 2)
/* Obsolete alias; this flag implies killing suid/sgid only. */
#define FUSE_WRITE_KILL_PRIV FUSE_WRITE_KILL_SUIDGID
/**
* Read flags
@ -431,6 +445,12 @@ struct fuse_file_lock {
*/
#define FUSE_ATTR_SUBMOUNT (1 << 0)
/**
* Open flags
* FUSE_OPEN_KILL_SUIDGID: Kill suid and sgid if executable
*/
#define FUSE_OPEN_KILL_SUIDGID (1 << 0)
enum fuse_opcode {
FUSE_LOOKUP = 1,
FUSE_FORGET = 2, /* no reply */
@ -592,14 +612,14 @@ struct fuse_setattr_in {
struct fuse_open_in {
uint32_t flags;
uint32_t unused;
uint32_t open_flags; /* FUSE_OPEN_... */
};
struct fuse_create_in {
uint32_t flags;
uint32_t mode;
uint32_t umask;
uint32_t padding;
uint32_t open_flags; /* FUSE_OPEN_... */
};
struct fuse_open_out {