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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 21/30] fuse, dax: Implement dax read/write operations
Date: Wed, 15 May 2019 15:27:06 -0400
Message-ID: <20190515192715.18000-22-vgoyal@redhat.com> (raw)
In-Reply-To: <20190515192715.18000-1-vgoyal@redhat.com>

This patch implements basic DAX support. mmap() is not implemented
yet and will come in later patches. This patch looks into implemeting
read/write.

We make use of interval tree to keep track of per inode dax mappings.

Do not use dax for file extending writes, instead just send WRITE message
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 <stefanha@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Signed-off-by: Liu Bo <bo.liu@linux.alibaba.com>
---
 fs/fuse/file.c            | 454 +++++++++++++++++++++++++++++++++++++-
 fs/fuse/fuse_i.h          |  21 ++
 fs/fuse/inode.c           |   6 +
 include/uapi/linux/fuse.h |   1 +
 4 files changed, 476 insertions(+), 6 deletions(-)

diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index e9a7aa97c539..edbb11ca735e 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -18,6 +18,12 @@
 #include <linux/swap.h>
 #include <linux/falloc.h>
 #include <linux/uio.h>
+#include <linux/dax.h>
+#include <linux/iomap.h>
+#include <linux/interval_tree_generic.h>
+
+INTERVAL_TREE_DEFINE(struct fuse_dax_mapping, rb, __u64, __subtree_last,
+                     START, LAST, static inline, fuse_dax_interval_tree);
 
 static int fuse_send_open(struct fuse_conn *fc, u64 nodeid, struct file *file,
 			  int opcode, struct fuse_open_out *outargp)
@@ -171,6 +177,173 @@ static void fuse_link_write_file(struct file *file)
 	spin_unlock(&fi->lock);
 }
 
+static struct fuse_dax_mapping *alloc_dax_mapping(struct fuse_conn *fc)
+{
+	struct fuse_dax_mapping *dmap = NULL;
+
+	spin_lock(&fc->lock);
+
+	/* TODO: Add logic to try to free up memory if wait is allowed */
+	if (fc->nr_free_ranges <= 0) {
+		spin_unlock(&fc->lock);
+		return NULL;
+	}
+
+	WARN_ON(list_empty(&fc->free_ranges));
+
+	/* Take a free range */
+	dmap = list_first_entry(&fc->free_ranges, struct fuse_dax_mapping,
+					list);
+	list_del_init(&dmap->list);
+	fc->nr_free_ranges--;
+	spin_unlock(&fc->lock);
+	return dmap;
+}
+
+/* This assumes fc->lock is held */
+static void __free_dax_mapping(struct fuse_conn *fc,
+				struct fuse_dax_mapping *dmap)
+{
+	list_add_tail(&dmap->list, &fc->free_ranges);
+	fc->nr_free_ranges++;
+}
+
+static void free_dax_mapping(struct fuse_conn *fc,
+				struct fuse_dax_mapping *dmap)
+{
+	/* Return fuse_dax_mapping to free list */
+	spin_lock(&fc->lock);
+	__free_dax_mapping(fc, dmap);
+	spin_unlock(&fc->lock);
+}
+
+/* offset passed in should be aligned to FUSE_DAX_MEM_RANGE_SZ */
+static int fuse_setup_one_mapping(struct inode *inode,
+				struct file *file, loff_t offset,
+				struct fuse_dax_mapping *dmap)
+{
+	struct fuse_conn *fc = get_fuse_conn(inode);
+	struct fuse_inode *fi = get_fuse_inode(inode);
+	struct fuse_file *ff = NULL;
+	struct fuse_setupmapping_in inarg;
+	FUSE_ARGS(args);
+	ssize_t err;
+
+	if (file)
+		ff = file->private_data;
+
+	WARN_ON(offset % FUSE_DAX_MEM_RANGE_SZ);
+	WARN_ON(fc->nr_free_ranges < 0);
+
+	/* Ask fuse daemon to setup mapping */
+	memset(&inarg, 0, sizeof(inarg));
+	inarg.foffset = offset;
+	if (ff)
+		inarg.fh = ff->fh;
+	else
+		inarg.fh = -1;
+	inarg.moffset = dmap->window_offset;
+	inarg.len = FUSE_DAX_MEM_RANGE_SZ;
+	if (file) {
+		inarg.flags |= (file->f_mode & FMODE_WRITE) ?
+				FUSE_SETUPMAPPING_FLAG_WRITE : 0;
+		inarg.flags |= (file->f_mode & FMODE_READ) ?
+				FUSE_SETUPMAPPING_FLAG_READ : 0;
+	} else {
+		inarg.flags |= FUSE_SETUPMAPPING_FLAG_READ;
+		inarg.flags |= FUSE_SETUPMAPPING_FLAG_WRITE;
+	}
+	args.in.h.opcode = FUSE_SETUPMAPPING;
+	args.in.h.nodeid = fi->nodeid;
+	args.in.numargs = 1;
+	args.in.args[0].size = sizeof(inarg);
+	args.in.args[0].value = &inarg;
+	err = fuse_simple_request(fc, &args);
+	if (err < 0) {
+		printk(KERN_ERR "%s request failed at mem_offset=0x%llx %zd\n",
+				 __func__, dmap->window_offset, err);
+		return err;
+	}
+
+	pr_debug("fuse_setup_one_mapping() succeeded. offset=0x%llx err=%zd\n", offset, err);
+
+	/* TODO: What locking is required here. For now, using fc->lock */
+	dmap->start = offset;
+	dmap->end = offset + FUSE_DAX_MEM_RANGE_SZ - 1;
+	/* Protected by fi->i_dmap_sem */
+	fuse_dax_interval_tree_insert(dmap, &fi->dmap_tree);
+	fi->nr_dmaps++;
+	return 0;
+}
+
+static int fuse_removemapping_one(struct inode *inode,
+					struct fuse_dax_mapping *dmap)
+{
+	struct fuse_inode *fi = get_fuse_inode(inode);
+	struct fuse_conn *fc = get_fuse_conn(inode);
+	struct fuse_removemapping_in inarg;
+	FUSE_ARGS(args);
+
+	memset(&inarg, 0, sizeof(inarg));
+	inarg.moffset = dmap->window_offset;
+	inarg.len = dmap->length;
+	args.in.h.opcode = FUSE_REMOVEMAPPING;
+	args.in.h.nodeid = fi->nodeid;
+	args.in.numargs = 1;
+	args.in.args[0].size = sizeof(inarg);
+	args.in.args[0].value = &inarg;
+	return fuse_simple_request(fc, &args);
+}
+
+/*
+ * It is called from evict_inode() and by that time inode is going away. So
+ * this function does not take any locks like fi->i_dmap_sem for traversing
+ * that fuse inode interval tree. If that lock is taken then lock validator
+ * complains of deadlock situation w.r.t fs_reclaim lock.
+ */
+void fuse_removemapping(struct inode *inode)
+{
+	struct fuse_conn *fc = get_fuse_conn(inode);
+	struct fuse_inode *fi = get_fuse_inode(inode);
+	ssize_t err;
+	struct fuse_dax_mapping *dmap;
+
+	/* Clear the mappings list */
+	while (true) {
+		WARN_ON(fi->nr_dmaps < 0);
+
+		dmap = fuse_dax_interval_tree_iter_first(&fi->dmap_tree, 0,
+								-1);
+		if (dmap) {
+			fuse_dax_interval_tree_remove(dmap, &fi->dmap_tree);
+			fi->nr_dmaps--;
+		}
+
+		if (!dmap)
+			break;
+
+		/*
+		 * During umount/shutdown, fuse connection is dropped first
+		 * and later evict_inode() is called later. That means any
+		 * removemapping messages are going to fail. Send messages
+		 * only if connection is up. Otherwise fuse daemon is
+		 * responsible for cleaning up any leftover references and
+		 * mappings.
+		 */
+		if (fc->connected) {
+			err = fuse_removemapping_one(inode, dmap);
+			if (err) {
+				pr_warn("Failed to removemapping. offset=0x%llx"
+					" len=0x%llx\n", dmap->window_offset,
+					dmap->length);
+			}
+		}
+
+		/* Add it back to free ranges list */
+		free_dax_mapping(fc, dmap);
+	}
+}
+
 void fuse_finish_open(struct inode *inode, struct file *file)
 {
 	struct fuse_file *ff = file->private_data;
@@ -1476,32 +1649,290 @@ static ssize_t fuse_direct_write_iter(struct kiocb *iocb, struct iov_iter *from)
 	return res;
 }
 
+static ssize_t fuse_dax_read_iter(struct kiocb *iocb, struct iov_iter *to);
 static ssize_t fuse_file_read_iter(struct kiocb *iocb, struct iov_iter *to)
 {
 	struct file *file = iocb->ki_filp;
 	struct fuse_file *ff = file->private_data;
+	struct inode *inode = file->f_mapping->host;
 
 	if (is_bad_inode(file_inode(file)))
 		return -EIO;
 
-	if (!(ff->open_flags & FOPEN_DIRECT_IO))
-		return fuse_cache_read_iter(iocb, to);
-	else
+	if (IS_DAX(inode))
+		return fuse_dax_read_iter(iocb, to);
+
+	if (ff->open_flags & FOPEN_DIRECT_IO)
 		return fuse_direct_read_iter(iocb, to);
+
+	return fuse_cache_read_iter(iocb, to);
 }
 
+static ssize_t fuse_dax_write_iter(struct kiocb *iocb, struct iov_iter *from);
 static ssize_t fuse_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
 {
 	struct file *file = iocb->ki_filp;
 	struct fuse_file *ff = file->private_data;
+	struct inode *inode = file->f_mapping->host;
 
 	if (is_bad_inode(file_inode(file)))
 		return -EIO;
 
-	if (!(ff->open_flags & FOPEN_DIRECT_IO))
-		return fuse_cache_write_iter(iocb, from);
-	else
+	if (IS_DAX(inode))
+		return fuse_dax_write_iter(iocb, from);
+
+	if (ff->open_flags & FOPEN_DIRECT_IO)
 		return fuse_direct_write_iter(iocb, from);
+
+	return fuse_cache_write_iter(iocb, from);
+}
+
+static void fuse_fill_iomap_hole(struct iomap *iomap, loff_t length)
+{
+	iomap->addr = IOMAP_NULL_ADDR;
+	iomap->length = length;
+	iomap->type = IOMAP_HOLE;
+}
+
+static void fuse_fill_iomap(struct inode *inode, loff_t pos, loff_t length,
+			struct iomap *iomap, struct fuse_dax_mapping *dmap,
+			unsigned flags)
+{
+	loff_t offset, len;
+	loff_t i_size = i_size_read(inode);
+
+	offset = pos - dmap->start;
+	len = min(length, dmap->length - offset);
+
+	/* If length is beyond end of file, truncate further */
+	if (pos + len > i_size)
+		len = i_size - pos;
+
+	if (len > 0) {
+		iomap->addr = dmap->window_offset + offset;
+		iomap->length = len;
+		if (flags & IOMAP_FAULT)
+			iomap->length = ALIGN(len, PAGE_SIZE);
+		iomap->type = IOMAP_MAPPED;
+		pr_debug("%s: returns iomap: addr 0x%llx offset 0x%llx"
+				" length 0x%llx\n", __func__, iomap->addr,
+				iomap->offset, iomap->length);
+	} else {
+		/* Mapping beyond end of file is hole */
+		fuse_fill_iomap_hole(iomap, length);
+		pr_debug("%s: returns iomap: addr 0x%llx offset 0x%llx"
+				"length 0x%llx\n", __func__, iomap->addr,
+				iomap->offset, iomap->length);
+	}
+}
+
+/* This is just for DAX and the mapping is ephemeral, do not use it for other
+ * purposes since there is no block device with a permanent mapping.
+ */
+static int fuse_iomap_begin(struct inode *inode, loff_t pos, loff_t length,
+			    unsigned flags, struct iomap *iomap)
+{
+	struct fuse_inode *fi = get_fuse_inode(inode);
+	struct fuse_conn *fc = get_fuse_conn(inode);
+	struct fuse_dax_mapping *dmap, *alloc_dmap = NULL;
+	int ret;
+
+	/* We don't support FIEMAP */
+	BUG_ON(flags & IOMAP_REPORT);
+
+	pr_debug("fuse_iomap_begin() called. pos=0x%llx length=0x%llx\n",
+			pos, length);
+
+	/*
+	 * Writes beyond end of file are not handled using dax path. Instead
+	 * a fuse write message is sent to daemon
+	 */
+	if (flags & IOMAP_WRITE && pos >= i_size_read(inode))
+		return -EIO;
+
+	iomap->offset = pos;
+	iomap->flags = 0;
+	iomap->bdev = NULL;
+	iomap->dax_dev = fc->dax_dev;
+
+	/*
+	 * Both read/write and mmap path can race here. So we need something
+	 * to make sure if we are setting up mapping, then other path waits
+	 *
+	 * For now, use a semaphore for this. It probably needs to be
+	 * optimized later.
+	 */
+	down_read(&fi->i_dmap_sem);
+	dmap = fuse_dax_interval_tree_iter_first(&fi->dmap_tree, pos, pos);
+
+	if (dmap) {
+		fuse_fill_iomap(inode, pos, length, iomap, dmap, flags);
+		up_read(&fi->i_dmap_sem);
+		return 0;
+	} else {
+		up_read(&fi->i_dmap_sem);
+		pr_debug("%s: no mapping at offset 0x%llx length 0x%llx\n",
+				__func__, pos, length);
+		if (pos >= i_size_read(inode))
+			goto iomap_hole;
+
+		alloc_dmap = alloc_dax_mapping(fc);
+		if (!alloc_dmap)
+			return -EBUSY;
+
+		/*
+		 * Drop read lock and take write lock so that only one
+		 * caller can try to setup mapping and other waits
+		 */
+		down_write(&fi->i_dmap_sem);
+		/*
+		 * We dropped lock. Check again if somebody else setup
+		 * mapping already.
+		 */
+		dmap = fuse_dax_interval_tree_iter_first(&fi->dmap_tree, pos,
+							pos);
+		if (dmap) {
+			fuse_fill_iomap(inode, pos, length, iomap, dmap, flags);
+			free_dax_mapping(fc, alloc_dmap);
+			up_write(&fi->i_dmap_sem);
+			return 0;
+		}
+
+		/* Setup one mapping */
+		ret = fuse_setup_one_mapping(inode, NULL,
+				ALIGN_DOWN(pos, FUSE_DAX_MEM_RANGE_SZ),
+				alloc_dmap);
+		if (ret < 0) {
+			printk("fuse_setup_one_mapping() failed. err=%d"
+				" pos=0x%llx\n", ret, pos);
+			free_dax_mapping(fc, alloc_dmap);
+			up_write(&fi->i_dmap_sem);
+			return ret;
+		}
+		fuse_fill_iomap(inode, pos, length, iomap, alloc_dmap, flags);
+		up_write(&fi->i_dmap_sem);
+		return 0;
+	}
+
+	/*
+	 * If read beyond end of file happnes, fs code seems to return
+	 * it as hole
+	 */
+iomap_hole:
+	fuse_fill_iomap_hole(iomap, length);
+	pr_debug("fuse_iomap_begin() returning hole mapping. pos=0x%llx length_asked=0x%llx length_returned=0x%llx\n", pos, length, iomap->length);
+	return 0;
+}
+
+static int fuse_iomap_end(struct inode *inode, loff_t pos, loff_t length,
+			  ssize_t written, unsigned flags,
+			  struct iomap *iomap)
+{
+	/* DAX writes beyond end-of-file aren't handled using iomap, so the
+	 * file size is unchanged and there is nothing to do here.
+	 */
+	return 0;
+}
+
+static const struct iomap_ops fuse_iomap_ops = {
+	.iomap_begin = fuse_iomap_begin,
+	.iomap_end = fuse_iomap_end,
+};
+
+static ssize_t fuse_dax_read_iter(struct kiocb *iocb, struct iov_iter *to)
+{
+	struct inode *inode = file_inode(iocb->ki_filp);
+	ssize_t ret;
+
+	if (iocb->ki_flags & IOCB_NOWAIT) {
+		if (!inode_trylock_shared(inode))
+			return -EAGAIN;
+	} else {
+		inode_lock_shared(inode);
+	}
+
+	ret = dax_iomap_rw(iocb, to, &fuse_iomap_ops);
+	inode_unlock_shared(inode);
+
+	/* TODO file_accessed(iocb->f_filp) */
+
+	return ret;
+}
+
+static bool file_extending_write(struct kiocb *iocb, struct iov_iter *from)
+{
+	struct inode *inode = file_inode(iocb->ki_filp);
+
+	return (iov_iter_rw(from) == WRITE &&
+		((iocb->ki_pos) >= i_size_read(inode)));
+}
+
+static ssize_t fuse_dax_direct_write(struct kiocb *iocb, struct iov_iter *from)
+{
+	struct inode *inode = file_inode(iocb->ki_filp);
+	struct fuse_io_priv io = FUSE_IO_PRIV_SYNC(iocb);
+	ssize_t ret;
+
+	ret = fuse_direct_io(&io, from, &iocb->ki_pos, FUSE_DIO_WRITE);
+	if (ret < 0)
+		return ret;
+
+	fuse_invalidate_attr(inode);
+	fuse_write_update_size(inode, iocb->ki_pos);
+	return ret;
+}
+
+static ssize_t fuse_dax_write_iter(struct kiocb *iocb, struct iov_iter *from)
+{
+	struct inode *inode = file_inode(iocb->ki_filp);
+	ssize_t ret, count;
+
+	if (iocb->ki_flags & IOCB_NOWAIT) {
+		if (!inode_trylock(inode))
+			return -EAGAIN;
+	} else {
+		inode_lock(inode);
+	}
+
+	ret = generic_write_checks(iocb, from);
+	if (ret <= 0)
+		goto out;
+
+	ret = file_remove_privs(iocb->ki_filp);
+	if (ret)
+		goto out;
+	/* TODO file_update_time() but we don't want metadata I/O */
+
+	/* Do not use dax for file extending writes as its an mmap and
+	 * trying to write beyong end of existing page will generate
+	 * SIGBUS.
+	 */
+	if (file_extending_write(iocb, from)) {
+		ret = fuse_dax_direct_write(iocb, from);
+		goto out;
+ 	}
+
+	ret = dax_iomap_rw(iocb, from, &fuse_iomap_ops);
+	if (ret < 0)
+		goto out;
+
+	/*
+	 * If part of the write was file extending, fuse dax path will not
+	 * take care of that. Do direct write instead.
+	 */
+	if (iov_iter_count(from) && file_extending_write(iocb, from)) {
+		count = fuse_dax_direct_write(iocb, from);
+		if (count < 0)
+			goto out;
+		ret += count;
+	}
+
+out:
+	inode_unlock(inode);
+
+	if (ret > 0)
+		ret = generic_write_sync(iocb, ret);
+	return ret;
 }
 
 static void fuse_writepage_free(struct fuse_conn *fc, struct fuse_req *req)
@@ -2180,6 +2611,11 @@ static ssize_t fuse_file_splice_read(struct file *in, loff_t *ppos,
 
 }
 
+static int fuse_dax_mmap(struct file *file, struct vm_area_struct *vma)
+{
+	return -EINVAL; /* TODO */
+}
+
 static int convert_fuse_file_lock(struct fuse_conn *fc,
 				  const struct fuse_file_lock *ffl,
 				  struct file_lock *fl)
@@ -3212,6 +3648,7 @@ static const struct address_space_operations fuse_file_aops  = {
 void fuse_init_file_inode(struct inode *inode)
 {
 	struct fuse_inode *fi = get_fuse_inode(inode);
+	struct fuse_conn *fc = get_fuse_conn(inode);
 
 	inode->i_fop = &fuse_file_operations;
 	inode->i_data.a_ops = &fuse_file_aops;
@@ -3221,4 +3658,9 @@ void fuse_init_file_inode(struct inode *inode)
 	fi->writectr = 0;
 	init_waitqueue_head(&fi->page_waitq);
 	INIT_LIST_HEAD(&fi->writepages);
+	fi->dmap_tree = RB_ROOT_CACHED;
+
+	if (fc->dax_dev) {
+		inode->i_flags |= S_DAX;
+	}
 }
diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h
index 5439e4628362..f1ae549eff98 100644
--- a/fs/fuse/fuse_i.h
+++ b/fs/fuse/fuse_i.h
@@ -98,11 +98,22 @@ struct fuse_forget_link {
 	struct fuse_forget_link *next;
 };
 
+#define START(node) ((node)->start)
+#define LAST(node) ((node)->end)
+
 /** Translation information for file offsets to DAX window offsets */
 struct fuse_dax_mapping {
 	/* Will connect in fc->free_ranges to keep track of free memory */
 	struct list_head list;
 
+	/* For interval tree in file/inode */
+	struct rb_node rb;
+	/** Start Position in file */
+	__u64 start;
+	/** End Position in file */
+	__u64 end;
+	__u64 __subtree_last;
+
        /** Position in DAX window */
        u64 window_offset;
 
@@ -195,6 +206,15 @@ struct fuse_inode {
 
 	/** Lock to protect write related fields */
 	spinlock_t lock;
+
+	/*
+	 * Semaphore to protect modifications to dmap_tree
+	 */
+	struct rw_semaphore i_dmap_sem;
+
+	/** Sorted rb tree of struct fuse_dax_mapping elements */
+	struct rb_root_cached dmap_tree;
+	unsigned long nr_dmaps;
 };
 
 /** FUSE inode state bits */
@@ -1226,5 +1246,6 @@ unsigned fuse_len_args(unsigned numargs, struct fuse_arg *args);
  * Get the next unique ID for a request
  */
 u64 fuse_get_unique(struct fuse_iqueue *fiq);
+void fuse_removemapping(struct inode *inode);
 
 #endif /* _FS_FUSE_I_H */
diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c
index 8a3dd72f9843..ad66a353554b 100644
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -83,7 +83,9 @@ static struct inode *fuse_alloc_inode(struct super_block *sb)
 	fi->attr_version = 0;
 	fi->orig_ino = 0;
 	fi->state = 0;
+	fi->nr_dmaps = 0;
 	mutex_init(&fi->mutex);
+	init_rwsem(&fi->i_dmap_sem);
 	spin_lock_init(&fi->lock);
 	fi->forget = fuse_alloc_forget();
 	if (!fi->forget) {
@@ -119,6 +121,10 @@ static void fuse_evict_inode(struct inode *inode)
 	if (inode->i_sb->s_flags & SB_ACTIVE) {
 		struct fuse_conn *fc = get_fuse_conn(inode);
 		struct fuse_inode *fi = get_fuse_inode(inode);
+		if (IS_DAX(inode)) {
+			fuse_removemapping(inode);
+			WARN_ON(fi->nr_dmaps);
+		}
 		fuse_queue_forget(fc, fi->forget, fi->nodeid, fi->nlookup);
 		fi->forget = NULL;
 	}
diff --git a/include/uapi/linux/fuse.h b/include/uapi/linux/fuse.h
index 9eb313220549..5042e227e8a8 100644
--- a/include/uapi/linux/fuse.h
+++ b/include/uapi/linux/fuse.h
@@ -826,6 +826,7 @@ struct fuse_copy_file_range_in {
 
 #define FUSE_SETUPMAPPING_ENTRIES 8
 #define FUSE_SETUPMAPPING_FLAG_WRITE (1ull << 0)
+#define FUSE_SETUPMAPPING_FLAG_READ (1ull << 1)
 struct fuse_setupmapping_in {
 	/* An already open handle */
 	uint64_t	fh;
-- 
2.20.1


  parent reply index

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 ` [PATCH v2 17/30] fuse, dax: add fuse_conn->dax_dev field Vivek Goyal
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 ` Vivek Goyal [this message]
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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