[PATCH] fuse: add O_NONBLOCK support to FUSE device
I don't like duplicating the connected and list_empty tests in fuse_dev_readv, but this seemed cleaner than adding the f_flags test to request_wait. Signed-off-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: Miklos Szeredi <miklos@szeredi.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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@ -619,6 +619,12 @@ static ssize_t fuse_dev_readv(struct file *file, const struct iovec *iov,
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err = -EPERM;
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if (!fc)
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goto err_unlock;
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err = -EAGAIN;
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if ((file->f_flags & O_NONBLOCK) && fc->connected &&
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list_empty(&fc->pending))
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goto err_unlock;
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request_wait(fc);
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err = -ENODEV;
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if (!fc->connected)
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