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From: Al Viro <viro@ZenIV.linux.org.uk>
To: Mike Marshall <hubcap@omnibond.com>
Cc: linux-fsdevel <linux-fsdevel@vger.kernel.org>
Subject: Re: [PATCH 4/4] orangefs: simplify compat ioctl handling
Date: Thu, 31 May 2018 22:03:27 +0100	[thread overview]
Message-ID: <20180531210327.GI30522@ZenIV.linux.org.uk> (raw)
In-Reply-To: <CAOg9mSSkK6JKs3221yWHYJk6_BOACM64OUN8kwZnDEqicnbhAA@mail.gmail.com>

On Thu, May 31, 2018 at 04:54:06PM -0400, Mike Marshall wrote:
> Thanks for the cleanup. This runs through xfstests with no regressions
> on 4.17-rc7.
> 
> I studied what to do about the sparse warning, looked at the code, and
> looked for hints from the original authors in the pvfs svn commit messages.
> 
> No luck with the old commit messages.
> 
> I got the sparse warning to quit with this change, which also runs through
> xfstests with no regressions, does it seem OK?
> 
> 
> $ git diff
> diff --git a/fs/orangefs/protocol.h b/fs/orangefs/protocol.h
> index 61ee8d64c842..d403cf29a99b 100644
> --- a/fs/orangefs/protocol.h
> +++ b/fs/orangefs/protocol.h
> @@ -342,7 +342,7 @@ enum {
>   * that may be 32 bit!
>   */
>  struct ORANGEFS_dev_map_desc {
> -       void *ptr;
> +       void __user *ptr;
>         __s32 total_size;
>         __s32 size;
>         __s32 count;

You want more than that -
--- a/fs/orangefs/orangefs-bufmap.c
+++ b/fs/orangefs/orangefs-bufmap.c
@@ -138,7 +138,7 @@ static int get(struct slot_map *m)
 
 /* used to describe mapped buffers */
 struct orangefs_bufmap_desc {
-       void *uaddr;                    /* user space address pointer */
+       void __user *uaddr;             /* user space address pointer */
        struct page **page_array;       /* array of mapped pages */
        int array_count;                /* size of above arrays */
        struct list_head list_link;

to go with it.  FWIW, the following takes care of almost all sparse
warnings in there; up to you whether to split it or not:

diff --git a/fs/orangefs/file.c b/fs/orangefs/file.c
index 26358efbf794..84f44365bfb3 100644
--- a/fs/orangefs/file.c
+++ b/fs/orangefs/file.c
@@ -544,7 +544,7 @@ static int orangefs_fault(struct vm_fault *vmf)
 	return filemap_fault(vmf);
 }
 
-const struct vm_operations_struct orangefs_file_vm_ops = {
+static const struct vm_operations_struct orangefs_file_vm_ops = {
 	.fault = orangefs_fault,
 	.map_pages = filemap_map_pages,
 	.page_mkwrite = filemap_page_mkwrite,
diff --git a/fs/orangefs/orangefs-bufmap.c b/fs/orangefs/orangefs-bufmap.c
index 4f927023d095..0a29f57d4c8f 100644
--- a/fs/orangefs/orangefs-bufmap.c
+++ b/fs/orangefs/orangefs-bufmap.c
@@ -138,7 +138,7 @@ static int get(struct slot_map *m)
 
 /* used to describe mapped buffers */
 struct orangefs_bufmap_desc {
-	void *uaddr;			/* user space address pointer */
+	void __user *uaddr;		/* user space address pointer */
 	struct page **page_array;	/* array of mapped pages */
 	int array_count;		/* size of above arrays */
 	struct list_head list_link;
@@ -215,19 +215,6 @@ int orangefs_bufmap_shift_query(void)
 static DECLARE_WAIT_QUEUE_HEAD(bufmap_waitq);
 static DECLARE_WAIT_QUEUE_HEAD(readdir_waitq);
 
-/*
- * orangefs_get_bufmap_init
- *
- * If bufmap_init is 1, then the shared memory system, including the
- * buffer_index_array, is available.  Otherwise, it is not.
- *
- * returns the value of bufmap_init
- */
-int orangefs_get_bufmap_init(void)
-{
-	return __orangefs_bufmap ? 1 : 0;
-}
-
 
 static struct orangefs_bufmap *
 orangefs_bufmap_alloc(struct ORANGEFS_dev_map_desc *user_desc)
diff --git a/fs/orangefs/orangefs-debugfs.c b/fs/orangefs/orangefs-debugfs.c
index 6e35f2f3c897..0732cb08173e 100644
--- a/fs/orangefs/orangefs-debugfs.c
+++ b/fs/orangefs/orangefs-debugfs.c
@@ -114,7 +114,7 @@ static const struct seq_operations help_debug_ops = {
 	.show	= help_show,
 };
 
-const struct file_operations debug_help_fops = {
+static const struct file_operations debug_help_fops = {
 	.owner		= THIS_MODULE,
 	.open           = orangefs_debug_help_open,
 	.read           = seq_read,
diff --git a/fs/orangefs/protocol.h b/fs/orangefs/protocol.h
index 61ee8d64c842..d403cf29a99b 100644
--- a/fs/orangefs/protocol.h
+++ b/fs/orangefs/protocol.h
@@ -342,7 +342,7 @@ enum {
  * that may be 32 bit!
  */
 struct ORANGEFS_dev_map_desc {
-	void *ptr;
+	void __user *ptr;
 	__s32 total_size;
 	__s32 size;
 	__s32 count;
diff --git a/fs/orangefs/waitqueue.c b/fs/orangefs/waitqueue.c
index 0577d6dba8c8..3de323f17506 100644
--- a/fs/orangefs/waitqueue.c
+++ b/fs/orangefs/waitqueue.c
@@ -17,8 +17,11 @@
 #include "orangefs-kernel.h"
 #include "orangefs-bufmap.h"
 
-static int wait_for_matching_downcall(struct orangefs_kernel_op_s *, long, bool);
-static void orangefs_clean_up_interrupted_operation(struct orangefs_kernel_op_s *);
+static int wait_for_matching_downcall(struct orangefs_kernel_op_s *op,
+				      long timeout, bool interruptible)
+	__acquires(op->lock);
+static void orangefs_clean_up_interrupted_operation(struct orangefs_kernel_op_s *op)
+	__releases(op->lock);
 
 /*
  * What we do in this function is to walk the list of operations that are
@@ -245,7 +248,8 @@ bool orangefs_cancel_op_in_progress(struct orangefs_kernel_op_s *op)
  * Change an op to the "given up" state and remove it from its list.
  */
 static void
-	orangefs_clean_up_interrupted_operation(struct orangefs_kernel_op_s *op)
+orangefs_clean_up_interrupted_operation(struct orangefs_kernel_op_s *op)
+	__releases(op->lock)
 {
 	/*
 	 * handle interrupted cases depending on what state we were in when
@@ -315,6 +319,7 @@ static void
 static int wait_for_matching_downcall(struct orangefs_kernel_op_s *op,
 				      long timeout,
 				      bool interruptible)
+	__acquires(op->lock)
 {
 	long n;
 

  reply	other threads:[~2018-05-31 21:03 UTC|newest]

Thread overview: 72+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-05-23 19:19 aio poll and a new in-kernel poll API V13 Christoph Hellwig
2018-05-23 19:19 ` [PATCH 01/33] fix io_destroy()/aio_complete() race Christoph Hellwig
2018-05-23 19:19 ` [PATCH 02/33] uapi: turn __poll_t sparse checkin on by default Christoph Hellwig
2018-05-23 19:19 ` [PATCH 03/33] fs: unexport poll_schedule_timeout Christoph Hellwig
2018-05-23 19:19 ` [PATCH 04/33] fs: cleanup do_pollfd Christoph Hellwig
2018-05-23 19:19 ` [PATCH 05/33] fs: update documentation to mention __poll_t and match the code Christoph Hellwig
2018-05-23 19:19 ` [PATCH 06/33] fs: add new vfs_poll and file_can_poll helpers Christoph Hellwig
2018-05-23 19:19 ` [PATCH 07/33] fs: introduce new ->get_poll_head and ->poll_mask methods Christoph Hellwig
2018-05-23 19:19 ` [PATCH 08/33] aio: simplify KIOCB_KEY handling Christoph Hellwig
2018-05-23 19:19 ` [PATCH 09/33] aio: simplify cancellation Christoph Hellwig
2018-05-23 19:19 ` [PATCH 10/33] aio: implement IOCB_CMD_POLL Christoph Hellwig
2018-05-23 19:20 ` [PATCH 11/33] aio: try to complete poll iocbs without context switch Christoph Hellwig
2018-05-23 19:20 ` [PATCH 12/33] net: refactor socket_poll Christoph Hellwig
2018-05-23 19:20 ` [PATCH 13/33] net: add support for ->poll_mask in proto_ops Christoph Hellwig
2018-05-23 19:20 ` [PATCH 14/33] net: remove sock_no_poll Christoph Hellwig
2018-05-23 19:20 ` [PATCH 15/33] net/tcp: convert to ->poll_mask Christoph Hellwig
2018-05-23 19:20 ` [PATCH 16/33] net/unix: " Christoph Hellwig
2018-05-23 19:20 ` [PATCH 17/33] net: convert datagram_poll users tp ->poll_mask Christoph Hellwig
2018-05-23 19:20 ` [PATCH 18/33] net/dccp: convert to ->poll_mask Christoph Hellwig
2018-05-23 19:20 ` [PATCH 19/33] net/atm: " Christoph Hellwig
2018-05-23 19:20 ` [PATCH 20/33] net/vmw_vsock: " Christoph Hellwig
2018-05-23 19:20 ` [PATCH 21/33] net/tipc: " Christoph Hellwig
2018-05-23 19:20 ` [PATCH 22/33] net/sctp: " Christoph Hellwig
2018-05-23 19:20 ` [PATCH 23/33] net/bluetooth: " Christoph Hellwig
2018-05-23 19:20 ` [PATCH 24/33] net/caif: " Christoph Hellwig
2018-05-23 19:20 ` [PATCH 25/33] net/nfc: " Christoph Hellwig
2018-05-23 19:20 ` [PATCH 26/33] net/phonet: " Christoph Hellwig
2018-05-23 19:20 ` [PATCH 27/33] net/iucv: " Christoph Hellwig
2018-05-23 19:20 ` [PATCH 28/33] net/rxrpc: " Christoph Hellwig
2018-05-23 19:20 ` [PATCH 29/33] crypto: af_alg: " Christoph Hellwig
2018-05-23 19:20 ` [PATCH 30/33] pipe: " Christoph Hellwig
2018-05-23 19:20 ` [PATCH 31/33] eventfd: switch " Christoph Hellwig
2018-05-23 19:20 ` [PATCH 32/33] timerfd: convert " Christoph Hellwig
2018-05-23 19:20 ` [PATCH 33/33] random: " Christoph Hellwig
2018-05-26  0:11 ` aio poll and a new in-kernel poll API V13 Al Viro
2018-05-26  7:09   ` Al Viro
2018-05-26  7:23     ` Christoph Hellwig
2018-05-27 22:27       ` Al Viro
2018-05-27 22:28         ` [PATCH 1/4] aio: all callers of aio_{read,write,fsync,poll} treat 0 and -EIOCBQUEUED the same way Al Viro
2018-05-27 22:28           ` [PATCH 2/4] aio_read_events_ring(): make a bit more readable Al Viro
2018-05-27 22:28           ` [PATCH 3/4] aio: shift copyin of iocb into io_submit_one() Al Viro
2018-05-28  5:16             ` Christoph Hellwig
2018-05-27 22:28           ` [PATCH 4/4] aio: fold do_io_submit() into callers Al Viro
2018-05-27 23:14             ` Al Viro
2018-05-28  5:24               ` Christoph Hellwig
2018-05-28  5:15           ` [PATCH 1/4] aio: all callers of aio_{read,write,fsync,poll} treat 0 and -EIOCBQUEUED the same way Christoph Hellwig
2018-05-28 14:04             ` Al Viro
2018-05-28 17:54               ` Al Viro
2018-05-28 17:57                 ` [PATCH v2 1/6] aio: take list removal to (some) callers of aio_complete() Al Viro
2018-05-28 17:57                   ` [PATCH v2 2/6] aio: all callers of aio_{read,write,fsync,poll} treat 0 and -EIOCBQUEUED the same way Al Viro
2018-05-29  6:08                     ` Christoph Hellwig
2018-05-28 17:57                   ` [PATCH v2 3/6] aio_read_events_ring(): make a bit more readable Al Viro
2018-05-28 17:57                   ` [PATCH v2 4/6] aio: shift copyin of iocb into io_submit_one() Al Viro
2018-05-28 17:57                   ` [PATCH v2 5/6] aio: fold do_io_submit() into callers Al Viro
2018-05-29  6:10                     ` Christoph Hellwig
2018-05-28 17:57                   ` [PATCH v2 6/6] aio: sanitize the limit checking in io_submit(2) Al Viro
2018-05-29  6:10                     ` Christoph Hellwig
2018-05-29  6:08                   ` [PATCH v2 1/6] aio: take list removal to (some) callers of aio_complete() Christoph Hellwig
2018-05-28 22:20                 ` [PATCH 1/4] vmsplice: lift import_iovec() into do_vmsplice() Al Viro
2018-05-28 22:20                   ` [PATCH 2/4] vmsplice(): lift importing iovec into vmsplice(2) and compat counterpart Al Viro
2018-05-28 22:20                   ` [PATCH 3/4] signalfd: lift sigmask copyin and size checks to callers of do_signalfd4() Al Viro
2018-05-28 22:20                   ` [PATCH 4/4] orangefs: simplify compat ioctl handling Al Viro
2018-05-31 11:11                     ` kbuild test robot
2018-05-31 20:54                     ` Mike Marshall
2018-05-31 21:03                       ` Al Viro [this message]
2018-06-01 21:13                         ` Mike Marshall
2018-06-06 22:57                   ` [1/4] vmsplice: lift import_iovec() into do_vmsplice() Andrei Vagin
2018-06-07 17:56                     ` Andrei Vagin
2018-06-11 20:14                       ` Cyrill Gorcunov
2018-06-11 20:16                         ` Al Viro
2018-06-11 20:18                           ` Cyrill Gorcunov
2018-06-14 22:22                           ` Andrey Vagin

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