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io_uring/kbuf: rename is_mapped

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In buffer lists we have ->is_mapped as well as ->is_mmap, it's
pretty hard to stay sane double checking which one means what,
and in the long run there is a high chance of an eventual bug.
Rename ->is_mapped into ->is_buf_ring.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/c4838f4d8ad506ad6373f1c305aee2d2c1a89786.1710343154.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Pavel Begunkov 2024-03-13 15:52:41 +00:00 committed by Jens Axboe
parent 2c5c0ba117
commit 9219e4a9d4
2 changed files with 11 additions and 11 deletions
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20
io_uring/kbuf.c
View File

@ -199,7 +199,7 @@ void __user *io_buffer_select(struct io_kiocb *req, size_t *len,
bl = io_buffer_get_list(ctx, req->buf_index);
if (likely(bl)) {
if (bl->is_mapped)
if (bl->is_buf_ring)
ret = io_ring_buffer_select(req, len, bl, issue_flags);
else
ret = io_provided_buffer_select(req, len, bl);
@ -253,7 +253,7 @@ static int __io_remove_buffers(struct io_ring_ctx *ctx,
if (!nbufs)
return 0;
if (bl->is_mapped) {
if (bl->is_buf_ring) {
i = bl->buf_ring->tail - bl->head;
if (bl->is_mmap) {
/*
@ -274,7 +274,7 @@ static int __io_remove_buffers(struct io_ring_ctx *ctx,
}
/* make sure it's seen as empty */
INIT_LIST_HEAD(&bl->buf_list);
bl->is_mapped = 0;
bl->is_buf_ring = 0;
return i;
}
@ -361,7 +361,7 @@ int io_remove_buffers(struct io_kiocb *req, unsigned int issue_flags)
if (bl) {
ret = -EINVAL;
/* can't use provide/remove buffers command on mapped buffers */
if (!bl->is_mapped)
if (!bl->is_buf_ring)
ret = __io_remove_buffers(ctx, bl, p->nbufs);
}
io_ring_submit_unlock(ctx, issue_flags);
@ -519,7 +519,7 @@ int io_provide_buffers(struct io_kiocb *req, unsigned int issue_flags)
}
}
/* can't add buffers via this command for a mapped buffer ring */
if (bl->is_mapped) {
if (bl->is_buf_ring) {
ret = -EINVAL;
goto err;
}
@ -575,7 +575,7 @@ static int io_pin_pbuf_ring(struct io_uring_buf_reg *reg,
bl->buf_pages = pages;
bl->buf_nr_pages = nr_pages;
bl->buf_ring = br;
bl->is_mapped = 1;
bl->is_buf_ring = 1;
bl->is_mmap = 0;
return 0;
error_unpin:
@ -642,7 +642,7 @@ static int io_alloc_pbuf_ring(struct io_ring_ctx *ctx,
}
ibf->inuse = 1;
bl->buf_ring = ibf->mem;
bl->is_mapped = 1;
bl->is_buf_ring = 1;
bl->is_mmap = 1;
return 0;
}
@ -688,7 +688,7 @@ int io_register_pbuf_ring(struct io_ring_ctx *ctx, void __user *arg)
bl = io_buffer_get_list(ctx, reg.bgid);
if (bl) {
/* if mapped buffer ring OR classic exists, don't allow */
if (bl->is_mapped || !list_empty(&bl->buf_list))
if (bl->is_buf_ring || !list_empty(&bl->buf_list))
return -EEXIST;
} else {
free_bl = bl = kzalloc(sizeof(*bl), GFP_KERNEL);
@ -730,7 +730,7 @@ int io_unregister_pbuf_ring(struct io_ring_ctx *ctx, void __user *arg)
bl = io_buffer_get_list(ctx, reg.bgid);
if (!bl)
return -ENOENT;
if (!bl->is_mapped)
if (!bl->is_buf_ring)
return -EINVAL;
__io_remove_buffers(ctx, bl, -1U);
@ -757,7 +757,7 @@ int io_register_pbuf_status(struct io_ring_ctx *ctx, void __user *arg)
bl = io_buffer_get_list(ctx, buf_status.buf_group);
if (!bl)
return -ENOENT;
if (!bl->is_mapped)
if (!bl->is_buf_ring)
return -EINVAL;
buf_status.head = bl->head;

2
io_uring/kbuf.h
View File

@ -26,7 +26,7 @@ struct io_buffer_list {
__u16 mask;
/* ring mapped provided buffers */
__u8 is_mapped;
__u8 is_buf_ring;
/* ring mapped provided buffers, but mmap'ed by application */
__u8 is_mmap;
/* bl is visible from an RCU point of view for lookup */