From: Vivek Goyal <vgoyal@redhat.com>
To: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
kvm@vger.kernel.org, linux-nvdimm@lists.01.org
Cc: vgoyal@redhat.com, miklos@szeredi.hu, stefanha@redhat.com,
dgilbert@redhat.com, swhiteho@redhat.com
Subject: [PATCH v2 17/30] fuse, dax: add fuse_conn->dax_dev field
Date: Wed, 15 May 2019 15:27:02 -0400 [thread overview]
Message-ID: <20190515192715.18000-18-vgoyal@redhat.com> (raw)
In-Reply-To: <20190515192715.18000-1-vgoyal@redhat.com>
From: Stefan Hajnoczi <stefanha@redhat.com>
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 <stefanha@redhat.com>
---
fs/fuse/cuse.c | 3 ++-
fs/fuse/fuse_i.h | 9 ++++++++-
fs/fuse/inode.c | 9 ++++++---
fs/fuse/virtio_fs.c | 1 +
4 files changed, 17 insertions(+), 5 deletions(-)
diff --git a/fs/fuse/cuse.c b/fs/fuse/cuse.c
index a509747153a7..417448f11f9f 100644
--- a/fs/fuse/cuse.c
+++ b/fs/fuse/cuse.c
@@ -504,7 +504,8 @@ static int cuse_channel_open(struct inode *inode, struct file *file)
* Limit the cuse channel to requests that can
* be represented in file->f_cred->user_ns.
*/
- fuse_conn_init(&cc->fc, file->f_cred->user_ns, &fuse_dev_fiq_ops, NULL);
+ fuse_conn_init(&cc->fc, file->f_cred->user_ns, NULL, &fuse_dev_fiq_ops,
+ NULL);
fud = fuse_dev_alloc_install(&cc->fc);
if (!fud) {
diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h
index f5cb4d40b83f..46fc1a454084 100644
--- a/fs/fuse/fuse_i.h
+++ b/fs/fuse/fuse_i.h
@@ -74,6 +74,9 @@ struct fuse_mount_data {
unsigned max_read;
unsigned blksize;
+ /* DAX device, may be NULL */
+ struct dax_device *dax_dev;
+
/* fuse input queue operations */
const struct fuse_iqueue_ops *fiq_ops;
@@ -822,6 +825,9 @@ struct fuse_conn {
/** List of device instances belonging to this connection */
struct list_head devices;
+
+ /** DAX device, non-NULL if DAX is supported */
+ struct dax_device *dax_dev;
};
static inline struct fuse_conn *get_fuse_conn_super(struct super_block *sb)
@@ -1049,7 +1055,8 @@ struct fuse_conn *fuse_conn_get(struct fuse_conn *fc);
* Initialize fuse_conn
*/
void fuse_conn_init(struct fuse_conn *fc, struct user_namespace *user_ns,
- const struct fuse_iqueue_ops *fiq_ops, void *fiq_priv);
+ struct dax_device *dax_dev,
+ const struct fuse_iqueue_ops *fiq_ops, void *fiq_priv);
/**
* Release reference to fuse_conn
diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c
index 731a8a74d032..42f3ac5b7521 100644
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -603,7 +603,8 @@ static void fuse_pqueue_init(struct fuse_pqueue *fpq)
}
void fuse_conn_init(struct fuse_conn *fc, struct user_namespace *user_ns,
- const struct fuse_iqueue_ops *fiq_ops, void *fiq_priv)
+ struct dax_device *dax_dev,
+ const struct fuse_iqueue_ops *fiq_ops, void *fiq_priv)
{
memset(fc, 0, sizeof(*fc));
spin_lock_init(&fc->lock);
@@ -628,6 +629,7 @@ void fuse_conn_init(struct fuse_conn *fc, struct user_namespace *user_ns,
atomic64_set(&fc->attr_version, 1);
get_random_bytes(&fc->scramble_key, sizeof(fc->scramble_key));
fc->pid_ns = get_pid_ns(task_active_pid_ns(current));
+ fc->dax_dev = dax_dev;
fc->user_ns = get_user_ns(user_ns);
fc->max_pages = FUSE_DEFAULT_MAX_PAGES_PER_REQ;
}
@@ -1140,8 +1142,8 @@ int fuse_fill_super_common(struct super_block *sb,
if (!fc)
goto err;
- fuse_conn_init(fc, sb->s_user_ns, mount_data->fiq_ops,
- mount_data->fiq_priv);
+ fuse_conn_init(fc, sb->s_user_ns, mount_data->dax_dev,
+ mount_data->fiq_ops, mount_data->fiq_priv);
fc->release = fuse_free_conn;
fud = fuse_dev_alloc_install(fc);
@@ -1243,6 +1245,7 @@ static int fuse_fill_super(struct super_block *sb, void *data, int silent)
goto err_fput;
__set_bit(FR_BACKGROUND, &init_req->flags);
+ d.dax_dev = NULL;
d.fiq_ops = &fuse_dev_fiq_ops;
d.fiq_priv = NULL;
d.fudptr = &file->private_data;
diff --git a/fs/fuse/virtio_fs.c b/fs/fuse/virtio_fs.c
index e76e0f5dce40..a23a1fb67217 100644
--- a/fs/fuse/virtio_fs.c
+++ b/fs/fuse/virtio_fs.c
@@ -866,6 +866,7 @@ static int virtio_fs_fill_super(struct super_block *sb, void *data,
goto err_free_fuse_devs;
__set_bit(FR_BACKGROUND, &init_req->flags);
+ d.dax_dev = NULL;
d.fiq_ops = &virtio_fs_fiq_ops;
d.fiq_priv = fs;
d.fudptr = (void **)&fs->vqs[VQ_REQUEST].fud;
--
2.20.1
next prev parent reply other threads:[~2019-05-15 19:29 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-15 19:26 [PATCH v2 00/30] [RFC] virtio-fs: shared file system for virtual machines Vivek Goyal
2019-05-15 19:26 ` [PATCH v2 01/30] fuse: delete dentry if timeout is zero Vivek Goyal
2019-05-15 19:26 ` [PATCH v2 02/30] fuse: Clear setuid bit even in cache=never path Vivek Goyal
2019-05-20 14:41 ` Miklos Szeredi
2019-05-20 14:44 ` Miklos Szeredi
2019-05-20 20:25 ` Nikolaus Rath
2019-05-21 15:01 ` Vivek Goyal
2019-05-15 19:26 ` [PATCH v2 03/30] fuse: Use default_file_splice_read for direct IO Vivek Goyal
2019-05-15 19:26 ` [PATCH v2 04/30] fuse: export fuse_end_request() Vivek Goyal
2019-05-15 19:26 ` [PATCH v2 05/30] fuse: export fuse_len_args() Vivek Goyal
2019-05-15 19:26 ` [PATCH v2 06/30] fuse: Export fuse_send_init_request() Vivek Goyal
2019-05-15 19:26 ` [PATCH v2 07/30] fuse: export fuse_get_unique() Vivek Goyal
2019-05-15 19:26 ` [PATCH v2 08/30] fuse: extract fuse_fill_super_common() Vivek Goyal
2019-05-15 19:26 ` [PATCH v2 09/30] fuse: add fuse_iqueue_ops callbacks Vivek Goyal
2019-05-15 19:26 ` [PATCH v2 10/30] fuse: Separate fuse device allocation and installation in fuse_conn Vivek Goyal
2019-05-15 19:26 ` [PATCH v2 11/30] virtio_fs: add skeleton virtio_fs.ko module Vivek Goyal
2019-05-15 19:26 ` [PATCH v2 12/30] dax: remove block device dependencies Vivek Goyal
2019-05-16 0:21 ` Dan Williams
2019-05-16 10:07 ` Stefan Hajnoczi
2019-05-16 14:23 ` Vivek Goyal
2019-05-15 19:26 ` [PATCH v2 13/30] dax: Pass dax_dev to dax_writeback_mapping_range() Vivek Goyal
2019-05-15 19:26 ` [PATCH v2 14/30] virtio: Add get_shm_region method Vivek Goyal
2019-05-15 19:27 ` [PATCH v2 15/30] virtio: Implement get_shm_region for PCI transport Vivek Goyal
2019-05-15 19:27 ` [PATCH v2 16/30] virtio: Implement get_shm_region for MMIO transport Vivek Goyal
2019-05-15 19:27 ` Vivek Goyal [this message]
2019-05-15 19:27 ` [PATCH v2 18/30] virtio_fs, dax: Set up virtio_fs dax_device Vivek Goyal
2019-07-17 17:27 ` Halil Pasic
2019-07-18 9:04 ` Cornelia Huck
2019-07-18 11:20 ` Halil Pasic
2019-07-18 14:47 ` Cornelia Huck
2019-07-18 13:15 ` Vivek Goyal
2019-07-18 14:30 ` Dan Williams
2019-07-22 10:51 ` Christian Borntraeger
2019-07-22 10:56 ` Dr. David Alan Gilbert
2019-07-22 11:20 ` Christian Borntraeger
2019-07-22 11:43 ` Cornelia Huck
2019-07-22 12:00 ` Christian Borntraeger
2019-07-22 12:08 ` David Hildenbrand
2019-07-29 13:20 ` Stefan Hajnoczi
2019-05-15 19:27 ` [PATCH v2 19/30] fuse: Keep a list of free dax memory ranges Vivek Goyal
2019-05-15 19:27 ` [PATCH v2 20/30] fuse: Introduce setupmapping/removemapping commands Vivek Goyal
2019-05-15 19:27 ` [PATCH v2 21/30] fuse, dax: Implement dax read/write operations Vivek Goyal
2019-05-15 19:27 ` [PATCH v2 22/30] fuse, dax: add DAX mmap support Vivek Goyal
2019-05-15 19:27 ` [PATCH v2 23/30] fuse: Define dax address space operations Vivek Goyal
2019-05-15 19:27 ` [PATCH v2 24/30] fuse, dax: Take ->i_mmap_sem lock during dax page fault Vivek Goyal
2019-05-15 19:27 ` [PATCH v2 25/30] fuse: Maintain a list of busy elements Vivek Goyal
2019-05-15 19:27 ` [PATCH v2 26/30] fuse: Add logic to free up a memory range Vivek Goyal
[not found] ` <CAN+Pk99SNKSf+GjSQUUWt_eu1fSjTy_ByUOEQUXHi8zNqXY1zA@mail.gmail.com>
2019-05-20 12:53 ` Vivek Goyal
2019-05-15 19:27 ` [PATCH v2 27/30] fuse: Release file in process context Vivek Goyal
2019-05-15 19:27 ` [PATCH v2 28/30] fuse: Reschedule dax free work if too many EAGAIN attempts Vivek Goyal
2019-05-15 19:27 ` [PATCH v2 29/30] fuse: Take inode lock for dax inode truncation Vivek Goyal
2019-05-15 19:27 ` [PATCH v2 30/30] virtio-fs: Do not provide abort interface in fusectl Vivek Goyal
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