All of lore.kernel.org
 help / color / mirror / Atom feed
From: David Howells <dhowells@redhat.com>
To: Trond Myklebust <trondmy@hammerspace.com>,
	Anna Schumaker <anna.schumaker@netapp.com>,
	Steve French <sfrench@samba.org>,
	Alexander Viro <viro@zeniv.linux.org.uk>,
	Matthew Wilcox <willy@infradead.org>
Cc: Jeff Layton <jlayton@redhat.com>,
	Dave Wysochanski <dwysocha@redhat.com>,
	dhowells@redhat.com, linux-cachefs@redhat.com,
	linux-afs@lists.infradead.org, linux-nfs@vger.kernel.org,
	linux-cifs@vger.kernel.org, ceph-devel@vger.kernel.org,
	v9fs-developer@lists.sourceforge.net,
	linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH 22/32] cachefiles: Implement read and write parts of new I/O API
Date: Mon, 13 Jul 2020 17:34:45 +0100	[thread overview]
Message-ID: <159465808553.1376674.11788737980809596736.stgit@warthog.procyon.org.uk> (raw)
In-Reply-To: <159465784033.1376674.18106463693989811037.stgit@warthog.procyon.org.uk>

Implement writing into the cache and reading back from the cache inside
cachefiles using asynchronous direct I/O from the specified iterator.  The
size and position of the request should be aligned to the reported
dio_block_size.

Errors and completion are reported by callback.

Signed-off-by: David Howells <dhowells@redhat.com>
---

 fs/cachefiles/io.c |  208 +++++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 202 insertions(+), 6 deletions(-)

diff --git a/fs/cachefiles/io.c b/fs/cachefiles/io.c
index ddb44ec5a199..42e0d620d778 100644
--- a/fs/cachefiles/io.c
+++ b/fs/cachefiles/io.c
@@ -12,30 +12,226 @@
 #include <linux/xattr.h>
 #include "internal.h"
 
+struct cachefiles_kiocb {
+	struct kiocb			iocb;
+	struct fscache_io_request	*req;
+	refcount_t			ki_refcnt;
+};
+
+static inline void cachefiles_put_kiocb(struct cachefiles_kiocb *ki)
+{
+	if (refcount_dec_and_test(&ki->ki_refcnt)) {
+		fscache_put_io_request(ki->req);
+		fput(ki->iocb.ki_filp);
+		kfree(ki);
+	}
+}
+
+/*
+ * Handle completion of a read from the cache.
+ */
+static void cachefiles_read_complete(struct kiocb *iocb, long ret, long ret2)
+{
+	struct cachefiles_kiocb *ki = container_of(iocb, struct cachefiles_kiocb, iocb);
+	struct fscache_io_request *req = ki->req;
+
+	_enter("%llx,%ld,%ld", req->len, ret, ret2);
+
+	fscache_end_io_operation(req->cookie);
+
+	if (ret < 0) {
+		req->error = ret;
+	} else if (ret != req->len) {
+		req->error = -ENODATA;
+	} else {
+		req->transferred = ret;
+		set_bit(FSCACHE_IO_DATA_FROM_CACHE, &req->flags);
+	}
+	if (req->io_done)
+		req->io_done(req);
+	cachefiles_put_kiocb(ki);
+}
+
 /*
  * Initiate a read from the cache.
  */
-int cachefiles_read(struct fscache_object *object,
+int cachefiles_read(struct fscache_object *obj,
 		    struct fscache_io_request *req,
 		    struct iov_iter *iter)
 {
-	req->error = -ENODATA;
+	struct cachefiles_object *object =
+		container_of(obj, struct cachefiles_object, fscache);
+	struct cachefiles_kiocb *ki;
+	struct file *file = object->backing_file;
+	ssize_t ret = -ENOBUFS;
+
+	_enter("%pD,%li,%llx,%llx/%llx",
+	       file, file_inode(file)->i_ino, req->pos, req->len, i_size_read(file->f_inode));
+
+	ki = kzalloc(sizeof(struct cachefiles_kiocb), GFP_KERNEL);
+	if (!ki)
+		goto presubmission_error;
+
+	refcount_set(&ki->ki_refcnt, 2);
+	ki->iocb.ki_filp	= get_file(file);
+	ki->iocb.ki_pos		= req->pos;
+	ki->iocb.ki_flags	= IOCB_DIRECT;
+	ki->iocb.ki_hint	= ki_hint_validate(file_write_hint(file));
+	ki->iocb.ki_ioprio	= get_current_ioprio();
+	ki->req			= req;
+
+	if (req->io_done)
+		ki->iocb.ki_complete = cachefiles_read_complete;
+
+	ret = rw_verify_area(READ, file, &ki->iocb.ki_pos, iov_iter_count(iter));
+	if (ret < 0)
+		goto presubmission_error_free;
+
+	fscache_get_io_request(req);
+	ret = call_read_iter(file, &ki->iocb, iter);
+	switch (ret) {
+	case -EIOCBQUEUED:
+		goto in_progress;
+
+	case -ERESTARTSYS:
+	case -ERESTARTNOINTR:
+	case -ERESTARTNOHAND:
+	case -ERESTART_RESTARTBLOCK:
+		/* There's no easy way to restart the syscall since other AIO's
+		 * may be already running. Just fail this IO with EINTR.
+		 */
+		ret = -EINTR;
+		/* Fall through */
+	default:
+		cachefiles_read_complete(&ki->iocb, ret, 0);
+		if (ret > 0)
+			ret = 0;
+		break;
+	}
+
+in_progress:
+	cachefiles_put_kiocb(ki);
+	_leave(" = %zd", ret);
+	return ret;
+
+presubmission_error_free:
+	fput(file);
+	kfree(ki);
+presubmission_error:
+	req->error = -ENOMEM;
+	if (req->io_done)
+		req->io_done(req);
+	return -ENOMEM;
+}
+
+/*
+ * Handle completion of a write to the cache.
+ */
+static void cachefiles_write_complete(struct kiocb *iocb, long ret, long ret2)
+{
+	struct cachefiles_kiocb *ki = container_of(iocb, struct cachefiles_kiocb, iocb);
+	struct fscache_io_request *req = ki->req;
+	struct inode *inode = file_inode(ki->iocb.ki_filp);
+
+	_enter("%llx,%ld,%ld", req->len, ret, ret2);
+
+	/* Tell lockdep we inherited freeze protection from submission thread */
+	__sb_writers_acquired(inode->i_sb, SB_FREEZE_WRITE);
+	__sb_end_write(inode->i_sb, SB_FREEZE_WRITE);
+
+	fscache_end_io_operation(req->cookie);
+
+	if (ret < 0)
+		req->error = ret;
+	else if (ret != req->len)
+		req->error = -ENOBUFS;
+	else
+		cachefiles_mark_content_map(req);
 	if (req->io_done)
 		req->io_done(req);
-	return -ENODATA;
+	cachefiles_put_kiocb(ki);
 }
 
 /*
  * Initiate a write to the cache.
  */
-int cachefiles_write(struct fscache_object *object,
+int cachefiles_write(struct fscache_object *obj,
 		     struct fscache_io_request *req,
 		     struct iov_iter *iter)
 {
-	req->error = -ENOBUFS;
+	struct cachefiles_object *object =
+		container_of(obj, struct cachefiles_object, fscache);
+	struct cachefiles_kiocb *ki;
+	struct inode *inode;
+	struct file *file = object->backing_file;
+	ssize_t ret = -ENOBUFS;
+
+	_enter("%pD,%li,%llx,%llx/%llx",
+	       file, file_inode(file)->i_ino, req->pos, req->len, i_size_read(file->f_inode));
+
+	ki = kzalloc(sizeof(struct cachefiles_kiocb), GFP_KERNEL);
+	if (!ki)
+		goto presubmission_error;
+
+	refcount_set(&ki->ki_refcnt, 2);
+	ki->iocb.ki_filp	= get_file(file);
+	ki->iocb.ki_pos		= req->pos;
+	ki->iocb.ki_flags	= IOCB_DIRECT | IOCB_WRITE;
+	ki->iocb.ki_hint	= ki_hint_validate(file_write_hint(file));
+	ki->iocb.ki_ioprio	= get_current_ioprio();
+	ki->req			= req;
+
+	if (req->io_done)
+		ki->iocb.ki_complete = cachefiles_write_complete;
+
+	ret = rw_verify_area(WRITE, file, &ki->iocb.ki_pos, iov_iter_count(iter));
+	if (ret < 0)
+		goto presubmission_error_free;
+
+	/* Open-code file_start_write here to grab freeze protection, which
+	 * will be released by another thread in aio_complete_rw().  Fool
+	 * lockdep by telling it the lock got released so that it doesn't
+	 * complain about the held lock when we return to userspace.
+	 */
+	inode = file_inode(file);
+	__sb_start_write(inode->i_sb, SB_FREEZE_WRITE, true);
+	__sb_writers_release(inode->i_sb, SB_FREEZE_WRITE);
+
+	fscache_get_io_request(req);
+	ret = call_write_iter(file, &ki->iocb, iter);
+	switch (ret) {
+	case -EIOCBQUEUED:
+		goto in_progress;
+
+	case -ERESTARTSYS:
+	case -ERESTARTNOINTR:
+	case -ERESTARTNOHAND:
+	case -ERESTART_RESTARTBLOCK:
+		/* There's no easy way to restart the syscall since other AIO's
+		 * may be already running. Just fail this IO with EINTR.
+		 */
+		ret = -EINTR;
+		/* Fall through */
+	default:
+		cachefiles_write_complete(&ki->iocb, ret, 0);
+		if (ret > 0)
+			ret = 0;
+		break;
+	}
+
+in_progress:
+	cachefiles_put_kiocb(ki);
+	_leave(" = %zd", ret);
+	return ret;
+
+presubmission_error_free:
+	fput(file);
+	kfree(ki);
+presubmission_error:
+	req->error = -ENOMEM;
 	if (req->io_done)
 		req->io_done(req);
-	return -ENOBUFS;
+	return -ENOMEM;
 }
 
 /*



WARNING: multiple messages have this Message-ID
From: David Howells <dhowells@redhat.com>
To: Trond Myklebust <trondmy@hammerspace.com>,
	Anna Schumaker <anna.schumaker@netapp.com>,
	Steve French <sfrench@samba.org>,
	Alexander Viro <viro@zeniv.linux.org.uk>,
	Matthew Wilcox <willy@infradead.org>
Cc: linux-cifs@vger.kernel.org, linux-nfs@vger.kernel.org,
	linux-kernel@vger.kernel.org, linux-cachefs@redhat.com,
	linux-fsdevel@vger.kernel.org,
	v9fs-developer@lists.sourceforge.net, ceph-devel@vger.kernel.org,
	linux-afs@lists.infradead.org
Subject: [PATCH 22/32] cachefiles: Implement read and write parts of new I/O API
Date: Mon, 13 Jul 2020 17:34:45 +0100	[thread overview]
Message-ID: <159465808553.1376674.11788737980809596736.stgit@warthog.procyon.org.uk> (raw)
In-Reply-To: <159465784033.1376674.18106463693989811037.stgit@warthog.procyon.org.uk>

Implement writing into the cache and reading back from the cache inside
cachefiles using asynchronous direct I/O from the specified iterator.  The
size and position of the request should be aligned to the reported
dio_block_size.

Errors and completion are reported by callback.

Signed-off-by: David Howells <dhowells@redhat.com>
---

 fs/cachefiles/io.c |  208 +++++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 202 insertions(+), 6 deletions(-)

diff --git a/fs/cachefiles/io.c b/fs/cachefiles/io.c
index ddb44ec5a199..42e0d620d778 100644
--- a/fs/cachefiles/io.c
+++ b/fs/cachefiles/io.c
@@ -12,30 +12,226 @@
 #include <linux/xattr.h>
 #include "internal.h"
 
+struct cachefiles_kiocb {
+	struct kiocb			iocb;
+	struct fscache_io_request	*req;
+	refcount_t			ki_refcnt;
+};
+
+static inline void cachefiles_put_kiocb(struct cachefiles_kiocb *ki)
+{
+	if (refcount_dec_and_test(&ki->ki_refcnt)) {
+		fscache_put_io_request(ki->req);
+		fput(ki->iocb.ki_filp);
+		kfree(ki);
+	}
+}
+
+/*
+ * Handle completion of a read from the cache.
+ */
+static void cachefiles_read_complete(struct kiocb *iocb, long ret, long ret2)
+{
+	struct cachefiles_kiocb *ki = container_of(iocb, struct cachefiles_kiocb, iocb);
+	struct fscache_io_request *req = ki->req;
+
+	_enter("%llx,%ld,%ld", req->len, ret, ret2);
+
+	fscache_end_io_operation(req->cookie);
+
+	if (ret < 0) {
+		req->error = ret;
+	} else if (ret != req->len) {
+		req->error = -ENODATA;
+	} else {
+		req->transferred = ret;
+		set_bit(FSCACHE_IO_DATA_FROM_CACHE, &req->flags);
+	}
+	if (req->io_done)
+		req->io_done(req);
+	cachefiles_put_kiocb(ki);
+}
+
 /*
  * Initiate a read from the cache.
  */
-int cachefiles_read(struct fscache_object *object,
+int cachefiles_read(struct fscache_object *obj,
 		    struct fscache_io_request *req,
 		    struct iov_iter *iter)
 {
-	req->error = -ENODATA;
+	struct cachefiles_object *object =
+		container_of(obj, struct cachefiles_object, fscache);
+	struct cachefiles_kiocb *ki;
+	struct file *file = object->backing_file;
+	ssize_t ret = -ENOBUFS;
+
+	_enter("%pD,%li,%llx,%llx/%llx",
+	       file, file_inode(file)->i_ino, req->pos, req->len, i_size_read(file->f_inode));
+
+	ki = kzalloc(sizeof(struct cachefiles_kiocb), GFP_KERNEL);
+	if (!ki)
+		goto presubmission_error;
+
+	refcount_set(&ki->ki_refcnt, 2);
+	ki->iocb.ki_filp	= get_file(file);
+	ki->iocb.ki_pos		= req->pos;
+	ki->iocb.ki_flags	= IOCB_DIRECT;
+	ki->iocb.ki_hint	= ki_hint_validate(file_write_hint(file));
+	ki->iocb.ki_ioprio	= get_current_ioprio();
+	ki->req			= req;
+
+	if (req->io_done)
+		ki->iocb.ki_complete = cachefiles_read_complete;
+
+	ret = rw_verify_area(READ, file, &ki->iocb.ki_pos, iov_iter_count(iter));
+	if (ret < 0)
+		goto presubmission_error_free;
+
+	fscache_get_io_request(req);
+	ret = call_read_iter(file, &ki->iocb, iter);
+	switch (ret) {
+	case -EIOCBQUEUED:
+		goto in_progress;
+
+	case -ERESTARTSYS:
+	case -ERESTARTNOINTR:
+	case -ERESTARTNOHAND:
+	case -ERESTART_RESTARTBLOCK:
+		/* There's no easy way to restart the syscall since other AIO's
+		 * may be already running. Just fail this IO with EINTR.
+		 */
+		ret = -EINTR;
+		/* Fall through */
+	default:
+		cachefiles_read_complete(&ki->iocb, ret, 0);
+		if (ret > 0)
+			ret = 0;
+		break;
+	}
+
+in_progress:
+	cachefiles_put_kiocb(ki);
+	_leave(" = %zd", ret);
+	return ret;
+
+presubmission_error_free:
+	fput(file);
+	kfree(ki);
+presubmission_error:
+	req->error = -ENOMEM;
+	if (req->io_done)
+		req->io_done(req);
+	return -ENOMEM;
+}
+
+/*
+ * Handle completion of a write to the cache.
+ */
+static void cachefiles_write_complete(struct kiocb *iocb, long ret, long ret2)
+{
+	struct cachefiles_kiocb *ki = container_of(iocb, struct cachefiles_kiocb, iocb);
+	struct fscache_io_request *req = ki->req;
+	struct inode *inode = file_inode(ki->iocb.ki_filp);
+
+	_enter("%llx,%ld,%ld", req->len, ret, ret2);
+
+	/* Tell lockdep we inherited freeze protection from submission thread */
+	__sb_writers_acquired(inode->i_sb, SB_FREEZE_WRITE);
+	__sb_end_write(inode->i_sb, SB_FREEZE_WRITE);
+
+	fscache_end_io_operation(req->cookie);
+
+	if (ret < 0)
+		req->error = ret;
+	else if (ret != req->len)
+		req->error = -ENOBUFS;
+	else
+		cachefiles_mark_content_map(req);
 	if (req->io_done)
 		req->io_done(req);
-	return -ENODATA;
+	cachefiles_put_kiocb(ki);
 }
 
 /*
  * Initiate a write to the cache.
  */
-int cachefiles_write(struct fscache_object *object,
+int cachefiles_write(struct fscache_object *obj,
 		     struct fscache_io_request *req,
 		     struct iov_iter *iter)
 {
-	req->error = -ENOBUFS;
+	struct cachefiles_object *object =
+		container_of(obj, struct cachefiles_object, fscache);
+	struct cachefiles_kiocb *ki;
+	struct inode *inode;
+	struct file *file = object->backing_file;
+	ssize_t ret = -ENOBUFS;
+
+	_enter("%pD,%li,%llx,%llx/%llx",
+	       file, file_inode(file)->i_ino, req->pos, req->len, i_size_read(file->f_inode));
+
+	ki = kzalloc(sizeof(struct cachefiles_kiocb), GFP_KERNEL);
+	if (!ki)
+		goto presubmission_error;
+
+	refcount_set(&ki->ki_refcnt, 2);
+	ki->iocb.ki_filp	= get_file(file);
+	ki->iocb.ki_pos		= req->pos;
+	ki->iocb.ki_flags	= IOCB_DIRECT | IOCB_WRITE;
+	ki->iocb.ki_hint	= ki_hint_validate(file_write_hint(file));
+	ki->iocb.ki_ioprio	= get_current_ioprio();
+	ki->req			= req;
+
+	if (req->io_done)
+		ki->iocb.ki_complete = cachefiles_write_complete;
+
+	ret = rw_verify_area(WRITE, file, &ki->iocb.ki_pos, iov_iter_count(iter));
+	if (ret < 0)
+		goto presubmission_error_free;
+
+	/* Open-code file_start_write here to grab freeze protection, which
+	 * will be released by another thread in aio_complete_rw().  Fool
+	 * lockdep by telling it the lock got released so that it doesn't
+	 * complain about the held lock when we return to userspace.
+	 */
+	inode = file_inode(file);
+	__sb_start_write(inode->i_sb, SB_FREEZE_WRITE, true);
+	__sb_writers_release(inode->i_sb, SB_FREEZE_WRITE);
+
+	fscache_get_io_request(req);
+	ret = call_write_iter(file, &ki->iocb, iter);
+	switch (ret) {
+	case -EIOCBQUEUED:
+		goto in_progress;
+
+	case -ERESTARTSYS:
+	case -ERESTARTNOINTR:
+	case -ERESTARTNOHAND:
+	case -ERESTART_RESTARTBLOCK:
+		/* There's no easy way to restart the syscall since other AIO's
+		 * may be already running. Just fail this IO with EINTR.
+		 */
+		ret = -EINTR;
+		/* Fall through */
+	default:
+		cachefiles_write_complete(&ki->iocb, ret, 0);
+		if (ret > 0)
+			ret = 0;
+		break;
+	}
+
+in_progress:
+	cachefiles_put_kiocb(ki);
+	_leave(" = %zd", ret);
+	return ret;
+
+presubmission_error_free:
+	fput(file);
+	kfree(ki);
+presubmission_error:
+	req->error = -ENOMEM;
 	if (req->io_done)
 		req->io_done(req);
-	return -ENOBUFS;
+	return -ENOMEM;
 }
 
 /*

  parent reply	other threads:[~2020-07-13 16:35 UTC|newest]

Thread overview: 55+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-13 16:30 [PATCH 00/32] fscache: Rewrite 2: Make the I/O interface use kiocb/iov_iter David Howells
2020-07-13 16:30 ` David Howells
2020-07-13 16:30 ` [PATCH 01/32] iov_iter: Add ITER_MAPPING David Howells
2020-07-13 16:30   ` David Howells
2020-07-19  1:44   ` Al Viro
2020-07-19  9:51   ` David Howells
2020-07-13 16:31 ` [PATCH 02/32] vm: Add wait/unlock functions for PG_fscache David Howells
2020-07-13 16:31   ` David Howells
2020-07-13 16:31 ` [PATCH 03/32] vfs: Export rw_verify_area() for use by cachefiles David Howells
2020-07-13 16:31 ` [PATCH 04/32] vfs: Provide S_CACHE_FILE inode flag David Howells
2020-07-13 16:31   ` David Howells
2020-07-13 16:31 ` [PATCH 05/32] mm: Provide lru_to_last_page() to get last of a page list David Howells
2020-07-13 16:31 ` [PATCH 06/32] cachefiles: Remove tree of active files and use S_CACHE_FILE inode flag David Howells
2020-07-13 16:31   ` David Howells
2020-07-13 16:31 ` [PATCH 07/32] fscache: Provide a simple thread pool for running ops asynchronously David Howells
2020-07-13 16:32 ` [PATCH 08/32] fscache: Replace the object management state machine David Howells
2020-07-13 16:32   ` David Howells
2020-07-13 16:32 ` [PATCH 09/32] fscache: Rewrite the I/O API based on iov_iter David Howells
2020-07-13 16:32 ` [PATCH 10/32] fscache: Remove fscache_wait_on_invalidate() David Howells
2020-07-13 16:32   ` David Howells
2020-07-13 16:32 ` [PATCH 11/32] fscache: Keep track of size of a file last set independently on the server David Howells
2020-07-13 16:32   ` David Howells
2020-07-13 16:32 ` [PATCH 12/32] fscache, cachefiles: Fix disabled histogram warnings David Howells
2020-07-13 16:32   ` David Howells
2020-07-13 16:33 ` [PATCH 13/32] fscache: Recast assertion in terms of cookie not being an index David Howells
2020-07-13 16:33 ` [PATCH 14/32] cachefiles: Remove some redundant checks on unsigned values David Howells
2020-07-13 16:33   ` David Howells
2020-07-13 16:33 ` [PATCH 15/32] cachefiles: trace: Log coherency checks David Howells
2020-07-13 16:33   ` David Howells
2020-07-13 16:33 ` [PATCH 16/32] cachefiles: Split cachefiles_drop_object() up a bit David Howells
2020-07-13 16:33   ` David Howells
2020-07-13 16:33 ` [PATCH 17/32] cachefiles: Implement new fscache I/O backend API David Howells
2020-07-13 16:33 ` [PATCH 18/32] cachefiles: Merge object->backer into object->dentry David Howells
2020-07-13 16:34 ` [PATCH 19/32] cachefiles: Implement a content-present indicator and bitmap David Howells
2020-07-13 16:34   ` David Howells
2020-07-13 16:34 ` [PATCH 20/32] cachefiles: Implement extent shaper David Howells
2020-07-13 16:34 ` [PATCH 21/32] cachefiles: Round the cachefile size up to DIO block size David Howells
2020-07-13 16:34 ` David Howells [this message]
2020-07-13 16:34   ` [PATCH 22/32] cachefiles: Implement read and write parts of new I/O API David Howells
2020-07-13 16:34 ` [PATCH 23/32] cachefiles: Add I/O tracepoints David Howells
2020-07-13 16:34   ` David Howells
2020-07-13 16:35 ` [PATCH 24/32] fscache: Add read helper David Howells
2020-07-13 16:35   ` David Howells
2020-07-13 16:35 ` [PATCH 25/32] fscache: Display cache-specific data in /proc/fs/fscache/objects David Howells
2020-07-13 16:35   ` David Howells
2020-07-13 16:35 ` [PATCH 26/32] fscache: Remove more obsolete stats David Howells
2020-07-13 16:35   ` David Howells
2020-07-13 16:35 ` [PATCH 27/32] fscache: New stats David Howells
2020-07-13 16:35 ` [PATCH 28/32] fscache, cachefiles: Rewrite invalidation David Howells
2020-07-13 16:35   ` David Howells
2020-07-13 16:36 ` [PATCH 29/32] fscache: Implement "will_modify" parameter on fscache_use_cookie() David Howells
2020-07-13 16:36 ` [PATCH 30/32] fscache: Provide resize operation David Howells
2020-07-13 16:36 ` [PATCH 31/32] fscache: Remove the update operation David Howells
2020-07-13 16:36 ` [PATCH 32/32] cachefiles: Shape write requests David Howells
2020-07-13 16:36   ` David Howells

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=159465808553.1376674.11788737980809596736.stgit@warthog.procyon.org.uk \
    --to=dhowells@redhat.com \
    --cc=anna.schumaker@netapp.com \
    --cc=ceph-devel@vger.kernel.org \
    --cc=dwysocha@redhat.com \
    --cc=jlayton@redhat.com \
    --cc=linux-afs@lists.infradead.org \
    --cc=linux-cachefs@redhat.com \
    --cc=linux-cifs@vger.kernel.org \
    --cc=linux-fsdevel@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-nfs@vger.kernel.org \
    --cc=sfrench@samba.org \
    --cc=trondmy@hammerspace.com \
    --cc=v9fs-developer@lists.sourceforge.net \
    --cc=viro@zeniv.linux.org.uk \
    --cc=willy@infradead.org \
    --subject='Re: [PATCH 22/32] cachefiles: Implement read and write parts of new I/O API' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.