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3f29f1c336
linux/fs/fuse
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Amir Goldstein 3f29f1c336 fuse: disable FOPEN_PARALLEL_DIRECT_WRITES with FUSE_DIRECT_IO_ALLOW_MMAP 
The new fuse init flag FUSE_DIRECT_IO_ALLOW_MMAP breaks assumptions made by
FOPEN_PARALLEL_DIRECT_WRITES and causes test generic/095 to hit
BUG_ON(fi->writectr < 0) assertions in fuse_set_nowrite():

generic/095 5s ...
  kernel BUG at fs/fuse/dir.c:1756!
...
  ? fuse_set_nowrite+0x3d/0xdd
  ? do_raw_spin_unlock+0x88/0x8f
  ? _raw_spin_unlock+0x2d/0x43
  ? fuse_range_is_writeback+0x71/0x84
  fuse_sync_writes+0xf/0x19
  fuse_direct_io+0x167/0x5bd
  fuse_direct_write_iter+0xf0/0x146

Auto disable FOPEN_PARALLEL_DIRECT_WRITES when server negotiated
FUSE_DIRECT_IO_ALLOW_MMAP.

Fixes: e78662e818 ("fuse: add a new fuse init flag to relax restrictions in no cache mode")
Cc: <stable@vger.kernel.org> # v6.6
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2023-12-04 10:19:32 +01:00
..
acl.c fs.idmapped.v6.3 2023-02-20 11:53:11 -08:00
control.c fuse: convert to new timestamp accessors 2023-10-18 14:08:21 +02:00
cuse.c driver core: class: remove module * from class_create() 2023-03-17 15:16:33 +01:00
dax.c fuse: dax: set fc->dax to NULL in fuse_dax_conn_free() 2023-12-04 10:16:53 +01:00
dev.c fuse_dev_ioctl(): switch to fdget() 2023-04-20 22:55:35 -04:00
dir.c fuse: convert to new timestamp accessors 2023-10-18 14:08:21 +02:00
file.c fuse: disable FOPEN_PARALLEL_DIRECT_WRITES with FUSE_DIRECT_IO_ALLOW_MMAP 2023-12-04 10:19:32 +01:00
fuse_i.h fuse: share lookup state between submount and its parent 2023-12-04 10:16:53 +01:00
inode.c fuse: share lookup state between submount and its parent 2023-12-04 10:16:53 +01:00
ioctl.c fuse: ioctl: translate ENOSYS in outarg 2023-06-21 11:17:36 +02:00
Kconfig dax: remove CONFIG_DAX_DRIVER 2021-12-04 08:58:51 -08:00
Makefile fuse: move ioctl to separate source file 2021-04-12 15:04:30 +02:00
readdir.c fuse: convert to new timestamp accessors 2023-10-18 14:08:21 +02:00
virtio_fs.c dax: enable dax fault handler to report VM_FAULT_HWPOISON 2023-06-26 07:54:23 -06:00
xattr.c fuse: move fuse_xattr_handlers to .rodata 2023-10-09 16:24:18 +02:00