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io_uring: simplify file ref tracking in submission state

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Currently, file refs in struct io_submit_state are tracked with 2 vars:
@has_refs -- how many refs were initially taken
@used_refs -- number of refs used

Replace it with a single variable counting how many refs left at the
current moment.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Pavel Begunkov 2020-07-16 23:28:33 +03:00 committed by Jens Axboe
parent 57f1a64958
commit 06ef3608b0
1 changed files with 4 additions and 8 deletions
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12
fs/io_uring.c
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@ -707,7 +707,6 @@ struct io_submit_state {
struct file *file;
unsigned int fd;
unsigned int has_refs;
unsigned int used_refs;
unsigned int ios_left;
};
@ -2327,10 +2326,8 @@ static void io_iopoll_req_issued(struct io_kiocb *req)
static void __io_state_file_put(struct io_submit_state *state)
{
int diff = state->has_refs - state->used_refs;
if (diff)
fput_many(state->file, diff);
if (state->has_refs)
fput_many(state->file, state->has_refs);
state->file = NULL;
}
@ -2352,7 +2349,7 @@ static struct file *__io_file_get(struct io_submit_state *state, int fd)
if (state->file) {
if (state->fd == fd) {
state->used_refs++;
state->has_refs--;
state->ios_left--;
return state->file;
}
@ -2363,9 +2360,8 @@ static struct file *__io_file_get(struct io_submit_state *state, int fd)
return NULL;
state->fd = fd;
state->has_refs = state->ios_left;
state->used_refs = 1;
state->ios_left--;
state->has_refs = state->ios_left;
return state->file;
}