io_uring: simplify io_file_supports_nowait()
Make sure that REQ_F_SUPPORT_NOWAIT is always set io_prep_rw(), and so we can stop caring about setting it down the line simplifying io_file_supports_nowait(). Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/60c8f1f5e2cb45e00f4897b2cec10c5b3669da91.1634425438.git.asml.silence@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
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@ -2764,10 +2764,8 @@ static bool io_bdev_nowait(struct block_device *bdev)
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* any file. For now, just ensure that anything potentially problematic is done
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* inline.
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*/
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static bool __io_file_supports_nowait(struct file *file)
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static bool __io_file_supports_nowait(struct file *file, umode_t mode)
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{
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umode_t mode = file_inode(file)->i_mode;
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if (S_ISBLK(mode)) {
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if (IS_ENABLED(CONFIG_BLOCK) &&
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io_bdev_nowait(I_BDEV(file->f_mapping->host)))
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@ -2790,11 +2788,26 @@ static bool __io_file_supports_nowait(struct file *file)
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return file->f_mode & FMODE_NOWAIT;
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}
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/*
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* If we tracked the file through the SCM inflight mechanism, we could support
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* any file. For now, just ensure that anything potentially problematic is done
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* inline.
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*/
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static unsigned int io_file_get_flags(struct file *file)
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{
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umode_t mode = file_inode(file)->i_mode;
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unsigned int res = 0;
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if (S_ISREG(mode))
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res |= FFS_ISREG;
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if (__io_file_supports_nowait(file, mode))
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res |= FFS_NOWAIT;
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return res;
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}
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static inline bool io_file_supports_nowait(struct io_kiocb *req)
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{
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if (likely(req->flags & REQ_F_SUPPORT_NOWAIT))
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return true;
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return __io_file_supports_nowait(req->file);
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return req->flags & REQ_F_SUPPORT_NOWAIT;
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}
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static int io_prep_rw(struct io_kiocb *req, const struct io_uring_sqe *sqe,
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@ -2806,8 +2819,8 @@ static int io_prep_rw(struct io_kiocb *req, const struct io_uring_sqe *sqe,
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unsigned ioprio;
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int ret;
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if (!io_req_ffs_set(req) && S_ISREG(file_inode(file)->i_mode))
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req->flags |= REQ_F_ISREG;
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if (!io_req_ffs_set(req))
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req->flags |= io_file_get_flags(file) << REQ_F_SUPPORT_NOWAIT_BIT;
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kiocb->ki_pos = READ_ONCE(sqe->off);
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if (kiocb->ki_pos == -1 && !(file->f_mode & FMODE_STREAM)) {
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@ -6761,10 +6774,7 @@ static void io_fixed_file_set(struct io_fixed_file *file_slot, struct file *file
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{
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unsigned long file_ptr = (unsigned long) file;
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if (__io_file_supports_nowait(file))
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file_ptr |= FFS_NOWAIT;
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if (S_ISREG(file_inode(file)->i_mode))
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file_ptr |= FFS_ISREG;
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file_ptr |= io_file_get_flags(file);
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file_slot->file_ptr = file_ptr;
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}
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