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Commit 27ae0c41 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse 

Pull fuse updates from Miklos Szeredi:
 "This fixes error propagation from writeback to fsync/close for
  writeback cache mode as well as adding a missing capability flag to
  the INIT message.  The rest are cleanups.

  (The commits are recent but all the code actually sat in -next for a
  while now.  The recommits are due to conflict avoidance and the
  addition of Cc: stable@...)"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse:
  fuse: use filemap_check_errors()
  mm: export filemap_check_errors() to modules
  fuse: fix wrong assignment of ->flags in fuse_send_init()
  fuse: fuse_flush must check mapping->flags for errors
  fuse: fsync() did not return IO errors
  fuse: don't mess with blocking signals
  new helper: wait_event_killable_exclusive()
  fuse: improve aio directIO write performance for size extending writes
parents 20d00ee8 4a7f4e88

fs/fuse/dev.c

+3 −27
Original line number Diff line number Diff line
@@ -99,19 +99,6 @@ void fuse_request_free(struct fuse_req *req) 
	kmem_cache_free(fuse_req_cachep, req);

}



static void block_sigs(sigset_t *oldset)

{

	sigset_t mask;



	siginitsetinv(&mask, sigmask(SIGKILL));

	sigprocmask(SIG_BLOCK, &mask, oldset);

}



static void restore_sigs(sigset_t *oldset)

{

	sigprocmask(SIG_SETMASK, oldset, NULL);

}



void __fuse_get_request(struct fuse_req *req)

{

	atomic_inc(&req->count);
@@ -151,15 +138,9 @@ static struct fuse_req *__fuse_get_req(struct fuse_conn *fc, unsigned npages, 
	atomic_inc(&fc->num_waiting);



	if (fuse_block_alloc(fc, for_background)) {

		sigset_t oldset;

		int intr;



		block_sigs(&oldset);

		intr = wait_event_interruptible_exclusive(fc->blocked_waitq,

				!fuse_block_alloc(fc, for_background));

		restore_sigs(&oldset);

		err = -EINTR;

		if (intr)

		if (wait_event_killable_exclusive(fc->blocked_waitq,

				!fuse_block_alloc(fc, for_background)))

			goto out;

	}

	/* Matches smp_wmb() in fuse_set_initialized() */
@@ -446,14 +427,9 @@ static void request_wait_answer(struct fuse_conn *fc, struct fuse_req *req) 
	}



	if (!test_bit(FR_FORCE, &req->flags)) {

		sigset_t oldset;



		/* Only fatal signals may interrupt this */

		block_sigs(&oldset);

		err = wait_event_interruptible(req->waitq,

		err = wait_event_killable(req->waitq,

					test_bit(FR_FINISHED, &req->flags));

		restore_sigs(&oldset);



		if (!err)

			return;

fs/fuse/file.c

+23 −12
Original line number Diff line number Diff line
@@ -417,6 +417,10 @@ static int fuse_flush(struct file *file, fl_owner_t id) 
	fuse_sync_writes(inode);

	inode_unlock(inode);



	err = filemap_check_errors(file->f_mapping);

	if (err)

		return err;



	req = fuse_get_req_nofail_nopages(fc, file);

	memset(&inarg, 0, sizeof(inarg));

	inarg.fh = ff->fh;
@@ -462,6 +466,16 @@ int fuse_fsync_common(struct file *file, loff_t start, loff_t end, 
		goto out;



	fuse_sync_writes(inode);



	/*

	 * Due to implementation of fuse writeback

	 * filemap_write_and_wait_range() does not catch errors.

	 * We have to do this directly after fuse_sync_writes()

	 */

	err = filemap_check_errors(file->f_mapping);

	if (err)

		goto out;



	err = sync_inode_metadata(inode, 1);

	if (err)

		goto out;
@@ -562,7 +576,6 @@ static ssize_t fuse_get_res_by_io(struct fuse_io_priv *io) 
 */

static void fuse_aio_complete(struct fuse_io_priv *io, int err, ssize_t pos)

{

	bool is_sync = is_sync_kiocb(io->iocb);

	int left;



	spin_lock(&io->lock);
@@ -572,11 +585,11 @@ static void fuse_aio_complete(struct fuse_io_priv *io, int err, ssize_t pos) 
		io->bytes = pos;



	left = --io->reqs;

	if (!left && is_sync)

	if (!left && io->blocking)

		complete(io->done);

	spin_unlock(&io->lock);



	if (!left && !is_sync) {

	if (!left && !io->blocking) {

		ssize_t res = fuse_get_res_by_io(io);



		if (res >= 0) {
@@ -2850,7 +2863,6 @@ fuse_direct_IO(struct kiocb *iocb, struct iov_iter *iter) 
	size_t count = iov_iter_count(iter);

	loff_t offset = iocb->ki_pos;

	struct fuse_io_priv *io;

	bool is_sync = is_sync_kiocb(iocb);



	pos = offset;

	inode = file->f_mapping->host;
@@ -2885,17 +2897,16 @@ fuse_direct_IO(struct kiocb *iocb, struct iov_iter *iter) 
	 */

	io->async = async_dio;

	io->iocb = iocb;

	io->blocking = is_sync_kiocb(iocb);



	/*

	 * We cannot asynchronously extend the size of a file. We have no method

	 * to wait on real async I/O requests, so we must submit this request

	 * synchronously.

	 * We cannot asynchronously extend the size of a file.

	 * In such case the aio will behave exactly like sync io.

	 */

	if (!is_sync && (offset + count > i_size) &&

	    iov_iter_rw(iter) == WRITE)

		io->async = false;

	if ((offset + count > i_size) && iov_iter_rw(iter) == WRITE)

		io->blocking = true;



	if (io->async && is_sync) {

	if (io->async && io->blocking) {

		/*

		 * Additional reference to keep io around after

		 * calling fuse_aio_complete()
@@ -2915,7 +2926,7 @@ fuse_direct_IO(struct kiocb *iocb, struct iov_iter *iter) 
		fuse_aio_complete(io, ret < 0 ? ret : 0, -1);



		/* we have a non-extending, async request, so return */

		if (!is_sync)

		if (!io->blocking)

			return -EIOCBQUEUED;



		wait_for_completion(&wait);

fs/fuse/fuse_i.h

+1 −0
Original line number Diff line number Diff line
@@ -259,6 +259,7 @@ struct fuse_io_priv { 
	struct kiocb *iocb;

	struct file *file;

	struct completion *done;

	bool blocking;

};



#define FUSE_IO_PRIV_SYNC(f) \

fs/fuse/inode.c

+1 −1
Original line number Diff line number Diff line
@@ -942,7 +942,7 @@ static void fuse_send_init(struct fuse_conn *fc, struct fuse_req *req) 
	arg->flags |= FUSE_ASYNC_READ | FUSE_POSIX_LOCKS | FUSE_ATOMIC_O_TRUNC |

		FUSE_EXPORT_SUPPORT | FUSE_BIG_WRITES | FUSE_DONT_MASK |

		FUSE_SPLICE_WRITE | FUSE_SPLICE_MOVE | FUSE_SPLICE_READ |

		FUSE_FLOCK_LOCKS | FUSE_IOCTL_DIR | FUSE_AUTO_INVAL_DATA |

		FUSE_FLOCK_LOCKS | FUSE_HAS_IOCTL_DIR | FUSE_AUTO_INVAL_DATA |

		FUSE_DO_READDIRPLUS | FUSE_READDIRPLUS_AUTO | FUSE_ASYNC_DIO |

		FUSE_WRITEBACK_CACHE | FUSE_NO_OPEN_SUPPORT |

		FUSE_PARALLEL_DIROPS;

include/linux/fs.h

+1 −0
Original line number Diff line number Diff line
@@ -2506,6 +2506,7 @@ extern int __filemap_fdatawrite_range(struct address_space *mapping, 
				loff_t start, loff_t end, int sync_mode);

extern int filemap_fdatawrite_range(struct address_space *mapping,

				loff_t start, loff_t end);

extern int filemap_check_errors(struct address_space *mapping);



extern int vfs_fsync_range(struct file *file, loff_t start, loff_t end,

			   int datasync);