On Wed, Apr 29, 2020 at 11:36:31AM +0200, Vitaly Kuznetsov wrote:
> Concerns were expressed around APF delivery via synthetic #PF exception as
> in some cases such delivery may collide with real page fault. For type 2
> (page ready) notifications we can easily switch to using an interrupt
>
On Wed, Apr 29, 2020 at 11:36:29AM +0200, Vitaly Kuznetsov wrote:
> Commit 9a6e7c39810e (""KVM: async_pf: Fix #DF due to inject "Page not
> Present" and "Page Ready" exceptions simultaneously") added a protection
> against 'page ready' notification coming before 'page not ready' is
> delivered.
On Tue, Sep 10, 2019 at 05:12:02PM +0200, Miklos Szeredi wrote:
> Git tree for this version is available here:
>
> git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse.git#virtiofs-v5
>
> Only post patches that actually add virtiofs (virtiofs-v5-base..virtiofs-v5).
>
> I've folded the
On Sun, Sep 08, 2019 at 07:10:03PM +0800, piaojun wrote:
>
>
> On 2019/9/6 3:48, Vivek Goyal wrote:
> > This object is used both by fuse_connection as well virt device. So make
> > this object reference counted and that makes it easy to define life cycle
> > of the
On Fri, Sep 06, 2019 at 11:52:10AM +0100, Stefan Hajnoczi wrote:
> On Thu, Sep 05, 2019 at 03:48:49PM -0400, Vivek Goyal wrote:
> > +static void virtio_fs_drain_queue(struct virtio_fs_vq *fsvq)
> > +{
> > + WARN_ON(fsvq->in_flight < 0);
> > +
> > + /
On Fri, Sep 06, 2019 at 01:05:34PM +0100, Stefan Hajnoczi wrote:
> On Thu, Sep 05, 2019 at 03:48:57PM -0400, Vivek Goyal wrote:
> > It is possible that a mount is in progress and device is being removed at
> > the same time. Use virtio_fs_mutex to avoid races.
> >
>
On Fri, Sep 06, 2019 at 01:03:09PM +0100, Stefan Hajnoczi wrote:
> On Thu, Sep 05, 2019 at 03:48:56PM -0400, Vivek Goyal wrote:
> > This object is used both by fuse_connection as well virt device. So make
> > this object reference counted and that makes it easy to de
On Fri, Sep 06, 2019 at 01:00:09PM +0100, Stefan Hajnoczi wrote:
> On Thu, Sep 05, 2019 at 03:48:55PM -0400, Vivek Goyal wrote:
> > diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h
> > index 85e2dcad68c1..04e2c000d63f 100644
> > --- a/fs/fuse/fuse_i.h
> > +++ b/fs/
On Fri, Sep 06, 2019 at 01:52:41PM +0200, Miklos Szeredi wrote:
> On Fri, Sep 6, 2019 at 12:36 PM Stefan Hajnoczi wrote:
> >
> > On Fri, Sep 06, 2019 at 10:15:14AM +0200, Miklos Szeredi wrote:
> > > On Thu, Sep 5, 2019 at 9:49 PM Vivek Goyal wrote:
> > > >
be around and
will be cleaned when filesystem is unmounted and sb/fc drops its reference.
Removing a device also stops all virt queues and any new reuqest gets
error -ENOTCONN. All existing in flight requests are drained before
->remove returns.
Signed-off-by: Vivek Goyal
---
fs/fuse/virtio_fs.c |
failed. Check this state even in
the path when request is being submitted first time.
Signed-off-by: Vivek Goyal
---
fs/fuse/virtio_fs.c | 9 -
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/fs/fuse/virtio_fs.c b/fs/fuse/virtio_fs.c
index a708ccb65662..e9497b565dd8 100644
mitted anymore
and user space will see error -ENOTCONN.
Signed-off-by: Vivek Goyal
---
fs/fuse/virtio_fs.c | 6 ++
1 file changed, 6 insertions(+)
diff --git a/fs/fuse/virtio_fs.c b/fs/fuse/virtio_fs.c
index 9d30530e3ca9..c46dd4d284d6 100644
--- a/fs/fuse/virtio_fs.c
+++ b/fs/fuse/virti
flush_work() on various workers, remove this
logic from virtio_free_devs().
Signed-off-by: Vivek Goyal
---
fs/fuse/virtio_fs.c | 11 ---
1 file changed, 8 insertions(+), 3 deletions(-)
diff --git a/fs/fuse/virtio_fs.c b/fs/fuse/virtio_fs.c
index 1ea0f889e804..a76bd5a04521 100644
--- a/fs
are fine with the patches, I am fine if you fold these
all into existing patch. I kept them separate so that review is easier.
Any feedback or comments are welcome.
Thanks
Vivek
Vivek Goyal (18):
virtiofs: Remove request from processing list before calling end
virtiofs: Check whether hiprio
We now stop queues and drain all the pending requests from all virtqueues.
So this is not a TODO anymore.
Got rid of incrementing fc->dev_count as well. It did not seem meaningful
for virtio_fs.
Signed-off-by: Vivek Goyal
---
fs/fuse/virtio_fs.c | 2 --
1 file changed, 2 deletions(-)
d
It is possible that a mount is in progress and device is being removed at
the same time. Use virtio_fs_mutex to avoid races.
This also takes care of bunch of races and removes some TODO items.
Signed-off-by: Vivek Goyal
---
fs/fuse/virtio_fs.c | 32 ++--
1 file
When device is going away, drain all pending requests.
Signed-off-by: Vivek Goyal
---
fs/fuse/virtio_fs.c | 83 -
1 file changed, 51 insertions(+), 32 deletions(-)
diff --git a/fs/fuse/virtio_fs.c b/fs/fuse/virtio_fs.c
index 90e7b2f345e5
As of now we maintain this count only for VQ_HIPRIO. Maintain it for
VQ_REQUEST as well so that later it can be used to drain VQ_REQUEST
queue.
Signed-off-by: Vivek Goyal
---
fs/fuse/virtio_fs.c | 4
1 file changed, 4 insertions(+)
diff --git a/fs/fuse/virtio_fs.c b/fs/fuse/virtio_fs.c
In error path we are calling fuse_request_end() but we need to clear
FR_SENT bit as well as remove request from processing queue. Otherwise
fuse_request_end() triggers a warning as well as other issues show up.
Signed-off-by: Vivek Goyal
---
fs/fuse/virtio_fs.c | 4
1 file changed, 4
In request submission path it is possible that virtqueue is already gone
due to driver->remove(). So do not access it in dev_dbg(). Use pr_debug()
instead.
If virtuqueue is gone, this will result in NULL pointer deference.
Signed-off-by: Vivek Goyal
---
fs/fuse/virtio_fs.c | 8
1 f
We maintain a fuse device per virt queue. This fuse devices are allocated
and installed during mount time and should be cleaned up when super block
is going away. Device removal should not clean it. Device removal should
stop queues and virtuques can go away.
Signed-off-by: Vivek Goyal
---
fs
Pass fsvq instead of vq as parameter to virtio_fs_enqueue_req(). We will
retrieve vq from fsvq under spin lock.
Later in the patch series we will retrieve vq only if fsvq is still connected
other vq might have been cleaned up by device ->remove code and we will
return error.
Signed-off-by: Vi
We already have an helper to cleanup fuse devices. Use that instead of
duplicating the code.
Signed-off-by: Vivek Goyal
---
fs/fuse/virtio_fs.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/fs/fuse/virtio_fs.c b/fs/fuse/virtio_fs.c
index a76bd5a04521..40259368a6bd 100644
This just marks are the queues are connected and ready to accept the
request.
Signed-off-by: Vivek Goyal
---
fs/fuse/virtio_fs.c | 19 ---
1 file changed, 16 insertions(+), 3 deletions(-)
diff --git a/fs/fuse/virtio_fs.c b/fs/fuse/virtio_fs.c
index d5730a50b303..f2936daca39c
it
at right time.
This patch still frees up memory during device remove time. A later patch
will make virtio_fs object reference counted and this memory will be
freed when last reference to object is dropped.
Signed-off-by: Vivek Goyal
---
fs/fuse/virtio_fs.c | 13 -
1 file changed, 8
o call into virtio_fs to
put the reference on the object (fiq_priv).
Signed-off-by: Vivek Goyal
---
fs/fuse/fuse_i.h | 5 +
fs/fuse/inode.c | 6 ++
2 files changed, 11 insertions(+)
diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h
index 85e2dcad68c1..04e2c000d63f 100644
--- a/fs/fuse/fu
Stop all the virt queues when device is going away. This will ensure that
no new requests are submitted to virtqueue and and request will end with
error -ENOTCONN.
Signed-off-by: Vivek Goyal
---
fs/fuse/virtio_fs.c | 14 ++
1 file changed, 14 insertions(+)
diff --git a/fs/fuse
ould be fine as we are not touching vdev
or virtqueues. And we have reference on virtio_fs object, so we know
rest of the data structures are valid.
So I can't see the need of any additional locking yet.
Signed-off-by: Vivek Goyal
---
fs/fuse/virtio_fs.c | 2 --
1 file changed, 2 deletions(-)
dif
On Tue, Sep 03, 2019 at 09:55:49AM -0400, Michael S. Tsirkin wrote:
[..]
> What's with all of the TODOs? Some of these are really scary,
> looks like they need to be figured out before this is merged.
Hi Michael,
One of the issue I noticed is races w.r.t device removal and super
block
On Tue, Sep 03, 2019 at 10:12:16AM -0400, Michael S. Tsirkin wrote:
> On Tue, Sep 03, 2019 at 10:07:52AM -0400, Vivek Goyal wrote:
> > On Tue, Sep 03, 2019 at 04:31:38AM -0400, Michael S. Tsirkin wrote:
> >
> > [..]
> > > + /* TODO lock */
> > > give me paus
On Tue, Sep 03, 2019 at 04:31:38AM -0400, Michael S. Tsirkin wrote:
[..]
> + /* TODO lock */
> give me pause.
>
> Cleanup generally seems broken to me - what pauses the FS
I am looking into device removal aspect of it now. Thinking of adding
a reference count to virtiofs device and possibly
On Thu, Aug 29, 2019 at 11:28:27AM +0200, Miklos Szeredi wrote:
[..]
> There are miscellaneous changes, so needs to be thoroughly tested.
Hi Miklos,
First round of tests passed. Ran pjdfstests, blogbench and bunch of fio
jobs and everyting looks good.
Thanks
Vivek
On Thu, Aug 29, 2019 at 03:41:26PM +0200, Miklos Szeredi wrote:
> On Thu, Aug 29, 2019 at 3:29 PM Vivek Goyal wrote:
>
> > #ifdef CONFIG_VIRTIO_FS
> > /** virtio-fs's physically contiguous buffer for in and out args */
> > void *argbuf;
> > #endif
On Thu, Aug 29, 2019 at 11:28:27AM +0200, Miklos Szeredi wrote:
> On Wed, Aug 21, 2019 at 7:38 PM Vivek Goyal wrote:
> >
> > Hi,
> >
> > Here are the V3 patches for virtio-fs filesystem. This time I have
> > broken the patch series in two parts. This is first pa
On Thu, Aug 29, 2019 at 11:28:27AM +0200, Miklos Szeredi wrote:
> On Wed, Aug 21, 2019 at 7:38 PM Vivek Goyal wrote:
> >
> > Hi,
> >
> > Here are the V3 patches for virtio-fs filesystem. This time I have
> > broken the patch series in two parts. This is first pa
On Tue, Aug 27, 2019 at 11:58:09PM -0700, Christoph Hellwig wrote:
> On Tue, Aug 27, 2019 at 12:38:28PM -0400, Vivek Goyal wrote:
> > > For bdev_dax_pgoff
> > > I'd much rather have the partition offset if there is on in the daxdev
> > > somehow so that we can get ri
On Wed, Aug 28, 2019 at 09:45:28AM +0200, Miklos Szeredi wrote:
> On Wed, Aug 21, 2019 at 7:38 PM Vivek Goyal wrote:
> >
> > From: Miklos Szeredi
>
> Nice patch, except I have no idea why I did this. Splice with
> FOPEN_DIRECT_IO seems to work fine without it.
I d
On Mon, Aug 26, 2019 at 04:51:52AM -0700, Christoph Hellwig wrote:
> On Wed, Aug 21, 2019 at 01:57:02PM -0400, Vivek Goyal wrote:
> > From: Stefan Hajnoczi
> >
> > Although struct dax_device itself is not tied to a block device, some
> > DAX code assumes there is
On Tue, Aug 27, 2019 at 10:39:43AM +0200, Cornelia Huck wrote:
> On Wed, 21 Aug 2019 13:57:06 -0400
> Vivek Goyal wrote:
>
> > From: Sebastien Boeuf
> >
> > On MMIO a new set of registers is defined for finding SHM
> > regions. Add their definition
On Tue, Aug 27, 2019 at 10:34:57AM +0200, Cornelia Huck wrote:
> On Wed, 21 Aug 2019 13:57:05 -0400
> Vivek Goyal wrote:
>
> > From: Sebastien Boeuf
> >
> > On PCI the shm regions are found using capability entries;
> > find a region by searching f
On Mon, Aug 26, 2019 at 04:33:26PM -0400, Vivek Goyal wrote:
> On Mon, Aug 26, 2019 at 04:53:16AM -0700, Christoph Hellwig wrote:
> > On Wed, Aug 21, 2019 at 01:57:03PM -0400, Vivek Goyal wrote:
> > > Right now dax_writeback_mapping_range() is passed a bdev and dax_dev
>
On Mon, Aug 26, 2019 at 04:53:16AM -0700, Christoph Hellwig wrote:
> On Wed, Aug 21, 2019 at 01:57:03PM -0400, Vivek Goyal wrote:
> > Right now dax_writeback_mapping_range() is passed a bdev and dax_dev
> > is searched from that bdev name.
> >
> > virtio-fs do
On Mon, Aug 26, 2019 at 09:43:08AM +0800, piaojun wrote:
[..]
> > +static bool vp_get_shm_region(struct virtio_device *vdev,
> > + struct virtio_shm_region *region, u8 id)
> > +{
> > + struct virtio_pci_device *vp_dev = to_vp_device(vdev);
> > + struct pci_dev *pci_dev
On Fri, Aug 09, 2019 at 03:58:20PM -0700, ira.we...@intel.com wrote:
> From: Ira Weiny
>
> Callers of dax_layout_busy_page() are only rarely operating on the
> entire file of concern.
>
> Teach dax_layout_busy_page() to operate on a sub-range of the
> address_space provided. Specifying 0 -
On Wed, Aug 21, 2019 at 12:49:34PM -0700, Liu Bo wrote:
[..]
> > +static int iomap_begin_upgrade_mapping(struct inode *inode, loff_t pos,
> > +loff_t length, unsigned flags,
> > +struct iomap *iomap)
> > +{
> > + struct
ion method
virtio: Implement get_shm_region for PCI transport
virtio: Implement get_shm_region for MMIO transport
Stefan Hajnoczi (4):
dax: remove block device dependencies
fuse, dax: add fuse_conn->dax_dev field
virtio_fs, dax: Set up virtio_fs dax_device
fuse, dax: add DAX mmap support
Introduce two new fuse commands to setup/remove memory mappings. This
will be used to setup/tear down file mapping in dax window.
Signed-off-by: Vivek Goyal
Signed-off-by: Peng Tao
---
include/uapi/linux/fuse.h | 39 +++
1 file changed, 39 insertions
Signed-off-by: Vivek Goyal
---
fs/dax.c| 16 ++--
fs/ext2/inode.c | 2 +-
fs/ext4/inode.c | 2 +-
fs/xfs/xfs_aops.c | 2 +-
include/linux/dax.h | 6 --
5 files changed, 17 insertions(+), 11 deletions(-)
diff --git a/fs/dax.c b/fs/dax.c
index a11147bbaf9e
From: Sebastien Boeuf
Virtio defines 'shared memory regions' that provide a continuously
shared region between the host and guest.
Provide a method to find a particular region on a device.
Signed-off-by: Sebastien Boeuf
Signed-off-by: Dr. David Alan Gilbert
---
include/linux/virtio_config.h
The device communicates FUSE_SETUPMAPPING/FUSE_REMOVMAPPING alignment
constraints via the FUST_INIT map_alignment field. Parse this field and
ensure our DAX mappings meet the alignment constraints.
We don't actually align anything differently since our mappings are
already 2MB aligned. Just
From: Stefan Hajnoczi
A struct dax_device instance is a prerequisite for the DAX filesystem
APIs. Let virtio_fs associate a dax_device with a fuse_conn. Classic
FUSE and CUSE set the pointer to NULL, disabling DAX.
Signed-off-by: Stefan Hajnoczi
---
fs/fuse/cuse.c | 3 ++-
g fuse replies from daemon on the host).
That means it blocks worker thread and it stops processing further
replies and system deadlocks.
So for now, force sync release of file in case of DAX inodes.
Signed-off-by: Vivek Goyal
---
fs/fuse/file.c | 15 ++-
1 file changed, 14 insertions
Divide the dax memory range into fixed size ranges (2MB for now) and put
them in a list. This will track free ranges. Once an inode requires a
free range, we will take one from here and put it in interval-tree
of ranges assigned to inode.
Signed-off-by: Vivek Goyal
Signed-off-by: Peng Tao
about circular dependencies. So define a new fuse_inode->i_mmap_sem.
Signed-off-by: Vivek Goyal
---
fs/fuse/dir.c| 2 ++
fs/fuse/file.c | 17 +
fs/fuse/fuse_i.h | 7 +++
fs/fuse/inode.c | 1 +
4 files changed, 23 insertions(+), 4 deletions(-)
diff --git a/fs/fuse/di
While reclaiming a dax range, we do not want to unamap whole file instead
want to make sure pages in a certain range do not have references taken
on them. Hence create a version of the function which allows to pass in
a range.
Cc: Dan Williams
Signed-off-by: Vivek Goyal
---
fs/dax.c
From: Sebastien Boeuf
On PCI the shm regions are found using capability entries;
find a region by searching for the capability.
Cc: k...@vger.kernel.org
Signed-off-by: Sebastien Boeuf
Signed-off-by: Dr. David Alan Gilbert
Signed-off-by: kbuild test robot
---
to daemon (like we do for direct I/O path). This will keep write and
i_size change atomic w.r.t crash.
Signed-off-by: Stefan Hajnoczi
Signed-off-by: Dr. David Alan Gilbert
Signed-off-by: Vivek Goyal
Signed-off-by: Miklos Szeredi
Signed-off-by: Liu Bo
Signed-off-by: Peng Tao
---
fs/fuse/file.c
.
Signed-off-by: Stefan Hajnoczi
Signed-off-by: Dr. David Alan Gilbert
Signed-off-by: Vivek Goyal
Signed-off-by: Sebastien Boeuf
Signed-off-by: Liu Bo
---
fs/fuse/fuse_i.h | 1 +
fs/fuse/inode.c| 8 +++
fs/fuse/virtio_fs.c| 119
This is done along the lines of ext4 and xfs. I primarily wanted ->writepages
hook at this time so that I could call into dax_writeback_mapping_range().
This in turn will decide which pfns need to be written back.
Signed-off-by: Vivek Goyal
---
fs/fuse/file.c | 19 +++
1 f
From: Stefan Hajnoczi
Add DAX mmap() support.
Signed-off-by: Stefan Hajnoczi
---
fs/fuse/file.c | 64 +-
1 file changed, 63 insertions(+), 1 deletion(-)
diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index f323b7b04414..32870bb862e7 100644
---
This list will be used selecting fuse_dax_mapping to free when number of
free mappings drops below a threshold.
Signed-off-by: Vivek Goyal
---
fs/fuse/file.c | 22 ++
fs/fuse/fuse_i.h | 8
fs/fuse/inode.c | 4
3 files changed, 34 insertions(+)
diff --git
Signed-off-by: Vivek Goyal
Signed-off-by: kbuild test robot
Signed-off-by: Liu Bo
---
fs/fuse/file.c | 488 +++-
fs/fuse/fuse_i.h| 25 +++
fs/fuse/inode.c | 5 +
fs/fuse/virtio_fs.c | 10 +
4 files changed, 519 insertions(+), 9 deletions(-)
From: Stefan Hajnoczi
Although struct dax_device itself is not tied to a block device, some
DAX code assumes there is a block device. Make block devices optional
by allowing bdev to be NULL in commonly used DAX APIs.
When there is no block device:
* Skip the partition offset calculation in
-by: Vivek Goyal
---
fs/fuse/file.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index e369a1f92d85..794c55131bd0 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -524,7 +524,7 @@ int fuse_open_common(struct inode *inode, struct file
*file
From: Sebastien Boeuf
On MMIO a new set of registers is defined for finding SHM
regions. Add their definitions and use them to find the region.
Cc: k...@vger.kernel.org
Signed-off-by: Sebastien Boeuf
---
drivers/virtio/virtio_mmio.c | 32
fuse devices early and install them into fuse connection
later.
This patch provides two separate helpers for fuse device allocation and
fuse device installation in fuse_conn.
Signed-off-by: Vivek Goyal
---
fs/fuse/cuse.c | 2 +-
fs/fuse/dev.c| 2 +-
fs/fuse/fuse_i.h | 4 +++-
fs/fuse
From: Stefan Hajnoczi
fuse_fill_super() includes code to process the fd= option and link the
struct fuse_dev to the fd's struct file. In virtio-fs there is no file
descriptor because /dev/fuse is not used.
This patch extracts fuse_fill_super_common() so that both classic fuse
and virtio-fs can
From: Miklos Szeredi
Don't hold onto dentry in lru list if need to re-lookup it anyway at next
access.
More advanced version of this patch would periodically flush out dentries
from the lru which have gone stale.
Signed-off-by: Miklos Szeredi
---
fs/fuse/dir.c | 26 +++---
From: Stefan Hajnoczi
The /dev/fuse device uses fiq->waitq and fasync to signal that requests
are available. These mechanisms do not apply to virtio-fs. This patch
introduces callbacks so alternative behavior can be used.
Note that queue_interrupt() changes along these lines:
File systems like virtio-fs need to do not have to play directly with
forget list data structures. There is a helper function use that instead.
Rename dequeue_forget() to fuse_dequeue_forget() and export it so that
stacked filesystems can use it.
Signed-off-by: Vivek Goyal
---
fs/fuse/dev.c
tio_fs: add skeleton virtio_fs.ko module
Vivek Goyal (5):
fuse: Export fuse_send_init_request()
Export fuse_dequeue_forget() function
fuse: Separate fuse device allocation and installation in fuse_conn
virtio-fs: Do not provide abort interface in fusectl
init/do_mounts.c: add virtio_fs root
From: Stefan Hajnoczi
virtio-fs will need to query the length of fuse_arg lists. Make the
symbol visible.
Signed-off-by: Stefan Hajnoczi
---
fs/fuse/dev.c| 7 ---
fs/fuse/fuse_i.h | 5 +
2 files changed, 9 insertions(+), 3 deletions(-)
diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c
From: Stefan Hajnoczi
Add a basic file system module for virtio-fs.
Signed-off-by: Stefan Hajnoczi
Signed-off-by: Vivek Goyal
Signed-off-by: Miklos Szeredi
---
fs/fuse/Kconfig | 11 +
fs/fuse/Makefile|1 +
fs/fuse/fuse_i.h| 12 +
fs
From: Stefan Hajnoczi
virtio-fs will need to complete requests from outside fs/fuse/dev.c.
Make the symbol visible.
Signed-off-by: Stefan Hajnoczi
---
fs/fuse/dev.c| 19 ++-
fs/fuse/fuse_i.h | 5 +
2 files changed, 15 insertions(+), 9 deletions(-)
diff --git
From: Miklos Szeredi
---
fs/fuse/file.c | 15 ++-
fs/splice.c| 3 ++-
include/linux/fs.h | 2 ++
3 files changed, 18 insertions(+), 2 deletions(-)
diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index 5ae2828beb00..c45ffe6f1ecb 100644
--- a/fs/fuse/file.c
+++
It is useful to mount the root file system via virtio_fs. During
testing a monolithic kernel is more convenient than an initramfs but
we'll need to teach the kernel how to boot directly from virtio_fs.
Signed-off-by: Stefan Hajnoczi
---
init/do_mounts.c | 10 ++
1 file changed, 10
From: Stefan Hajnoczi
virtio-fs will need unique IDs for FORGET requests from outside
fs/fuse/dev.c. Make the symbol visible.
Signed-off-by: Stefan Hajnoczi
---
fs/fuse/dev.c| 3 ++-
fs/fuse/fuse_i.h | 5 +
2 files changed, 7 insertions(+), 1 deletion(-)
diff --git a/fs/fuse/dev.c
virtio-fs does not support aborting requests which are being processed. That
is requests which have been sent to fuse daemon on host.
So do not provide "abort" interface for virtio-fs in fusectl.
Signed-off-by: Vivek Goyal
---
fs/fuse/control.c | 4 ++--
fs/fuse/fuse_i.h| 4 +++
This will be used by virtio-fs to send init request to fuse server after
initialization of virt queues.
Signed-off-by: Vivek Goyal
---
fs/fuse/dev.c| 1 +
fs/fuse/fuse_i.h | 1 +
fs/fuse/inode.c | 3 ++-
3 files changed, 4 insertions(+), 1 deletion(-)
diff --git a/fs/fuse/dev.c b/fs/fuse
On Wed, Jul 17, 2019 at 07:27:25PM +0200, Halil Pasic wrote:
> On Wed, 15 May 2019 15:27:03 -0400
> Vivek Goyal wrote:
>
> > From: Stefan Hajnoczi
> >
> > Setup a dax device.
> >
> > Use the shm capability to find the cache entry and map it.
> >
&
On Mon, May 20, 2019 at 04:41:37PM +0200, Miklos Szeredi wrote:
> On Wed, May 15, 2019 at 03:26:47PM -0400, Vivek Goyal wrote:
> > If fuse daemon is started with cache=never, fuse falls back to direct IO.
> > In that write path we don't call file_remove_privs() and that means
On Sun, May 19, 2019 at 03:48:05PM +0800, Eric Ren wrote:
> Hi,
>
> @@ -1784,8 +1822,23 @@ static int fuse_iomap_begin(struct inode *inode,
> > loff_t pos, loff_t length,
> > if (pos >= i_size_read(inode))
> > goto iomap_hole;
> >
> > -
On Wed, May 15, 2019 at 05:21:51PM -0700, Dan Williams wrote:
[..]
> It just seems to me that we should stop pretending that the
> filesystem-dax facility requires block devices and try to move this
> functionality to generically use a dax device across all interfaces.
That sounds reasonable and
From: Stefan Hajnoczi
virtio-fs will need to complete requests from outside fs/fuse/dev.c.
Make the symbol visible.
Signed-off-by: Stefan Hajnoczi
---
fs/fuse/dev.c| 19 ++-
fs/fuse/fuse_i.h | 5 +
2 files changed, 15 insertions(+), 9 deletions(-)
diff --git
From: Miklos Szeredi
---
fs/fuse/file.c | 15 ++-
fs/splice.c| 3 ++-
include/linux/fs.h | 2 ++
3 files changed, 18 insertions(+), 2 deletions(-)
diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index 5baf07fd2876..e9a7aa97c539 100644
--- a/fs/fuse/file.c
+++
From: Miklos Szeredi
Don't hold onto dentry in lru list if need to re-lookup it anyway at next
access.
More advanced version of this patch would periodically flush out dentries
from the lru which have gone stale.
Signed-off-by: Miklos Szeredi
---
fs/fuse/dir.c | 26 +++---
fuse devices early and install them into fuse connection
later.
This patch provides two separate helpers for fuse device allocation and
fuse device installation in fuse_conn.
Signed-off-by: Vivek Goyal
---
fs/fuse/cuse.c | 2 +-
fs/fuse/dev.c| 2 +-
fs/fuse/fuse_i.h | 4 +++-
fs/fuse
From: Sebastien Boeuf
Virtio defines 'shared memory regions' that provide a continuously
shared region between the host and guest.
Provide a method to find a particular region on a device.
Signed-off-by: Sebastien Boeuf
Signed-off-by: Dr. David Alan Gilbert
---
include/linux/virtio_config.h
From: Sebastien Boeuf
On MMIO a new set of registers is defined for finding SHM
regions. Add their definitions and use them to find the region.
Signed-off-by: Sebastien Boeuf
---
drivers/virtio/virtio_mmio.c | 32
include/uapi/linux/virtio_mmio.h | 11
Right now dax_writeback_mapping_range() is passed a bdev and dax_dev
is searched from that bdev name.
virtio-fs does not have a bdev. So pass in dax_dev also to
dax_writeback_mapping_range(). If dax_dev is passed in, bdev is not
used otherwise dax_dev is searched using bdev.
Signed-off-by: Vivek
From: Stefan Hajnoczi
virtio-fs will need to query the length of fuse_arg lists. Make the
symbol visible.
Signed-off-by: Stefan Hajnoczi
---
fs/fuse/dev.c| 7 ---
fs/fuse/fuse_i.h | 5 +
2 files changed, 9 insertions(+), 3 deletions(-)
diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c
g fuse replies from daemon on the host).
That means it blocks worker thread and it stops processing further
replies and system deadlocks.
So for now, force sync release of file in case of DAX inodes.
Signed-off-by: Vivek Goyal
---
fs/fuse/file.c | 15 ++-
1 file changed, 14 insertions
-by: Vivek Goyal
---
fs/fuse/file.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index 9b82d9b4ebc3..d0979dc32f08 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -420,7 +420,7 @@ int fuse_open_common(struct inode *inode, struct file
*file
Introduce two new fuse commands to setup/remove memory mappings. This
will be used to setup/tear down file mapping in dax window.
Signed-off-by: Vivek Goyal
---
include/uapi/linux/fuse.h | 33 +
1 file changed, 33 insertions(+)
diff --git a/include/uapi/linux
/chmod/12.t
Signed-off-by: Vivek Goyal
---
fs/fuse/file.c | 18 +++---
1 file changed, 11 insertions(+), 7 deletions(-)
diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index 06096b60f1df..5baf07fd2876 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -1456,14 +1456,18 @@ static ssize_t
to daemon (like we do for direct I/O path). This will keep write and
i_size change atomic w.r.t crash.
Signed-off-by: Stefan Hajnoczi
Signed-off-by: Dr. David Alan Gilbert
Signed-off-by: Vivek Goyal
Signed-off-by: Miklos Szeredi
Signed-off-by: Liu Bo
---
fs/fuse/file.c| 454
about circular dependencies. So define a new fuse_inode->i_mmap_sem.
Signed-off-by: Vivek Goyal
---
fs/fuse/dir.c| 2 ++
fs/fuse/file.c | 17 +
fs/fuse/fuse_i.h | 7 +++
fs/fuse/inode.c | 1 +
4 files changed, 23 insertions(+), 4 deletions(-)
diff --git a/fs/fuse/di
From: Stefan Hajnoczi
Add DAX mmap() support.
Signed-off-by: Stefan Hajnoczi
---
fs/fuse/file.c | 64 +-
1 file changed, 63 insertions(+), 1 deletion(-)
diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index edbb11ca735e..a053bcb9498d 100644
---
From: Stefan Hajnoczi
A struct dax_device instance is a prerequisite for the DAX filesystem
APIs. Let virtio_fs associate a dax_device with a fuse_conn. Classic
FUSE and CUSE set the pointer to NULL, disabling DAX.
Signed-off-by: Stefan Hajnoczi
---
fs/fuse/cuse.c | 3 ++-
the dax ranges, all the attempts to acquire lock will fail.
So if there are too many inode lock failures (-EAGAIN), reschedule the
worker with a 10ms delay.
Signed-off-by: Vivek Goyal
---
fs/fuse/file.c | 12 ++--
1 file changed, 10 insertions(+), 2 deletions(-)
diff --git a/fs/fuse
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