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io_uring: rely solely on FMODE_NOWAIT 

Now that we have both sockets and block devices setting FMODE_NOWAIT
appropriately, we can get rid of all the odd special casing in
__io_file_supports_nowait() and rely soley on FMODE_NOWAIT and
O_NONBLOCK rather than special case sockets and (in particular) bdevs.

Link: https://lore.kernel.org/r/20230509151910.183637-4-axboe@kernel.dk
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe 2023-05-09 09:19:10 -06:00
parent e9833d8701
commit caec5ebe77
1 changed files with 0 additions and 21 deletions
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21
io_uring/io_uring.c
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@ -1758,11 +1758,6 @@ static void io_iopoll_req_issued(struct io_kiocb *req, unsigned int issue_flags)
}
}
static bool io_bdev_nowait(struct block_device *bdev)
{
return !bdev || bdev_nowait(bdev);
}
/*
* If we tracked the file through the SCM inflight mechanism, we could support
* any file. For now, just ensure that anything potentially problematic is done
@ -1770,22 +1765,6 @@ static bool io_bdev_nowait(struct block_device *bdev)
*/
static bool __io_file_supports_nowait(struct file *file, umode_t mode)
{
if (S_ISBLK(mode)) {
if (IS_ENABLED(CONFIG_BLOCK) &&
io_bdev_nowait(I_BDEV(file->f_mapping->host)))
return true;
return false;
}
if (S_ISSOCK(mode))
return true;
if (S_ISREG(mode)) {
if (IS_ENABLED(CONFIG_BLOCK) &&
io_bdev_nowait(file->f_inode->i_sb->s_bdev) &&
!io_is_uring_fops(file))
return true;
return false;
}
/* any ->read/write should understand O_NONBLOCK */
if (file->f_flags & O_NONBLOCK)
return true;