Revision 5565ec4ef4f0d676fc8518556e239ac6945b5186 authored by Linus Torvalds on 19 May 2023, 22:54:01 UTC, committed by Linus Torvalds on 19 May 2023, 22:54:01 UTC
Pull SCSI fixes from James Bottomley: "Six small fixes. Four in drivers and the two core changes should be read together as a correction to a prior iorequest_cnt fix that exposed us to a potential use after free" * tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: scsi: core: Decrease scsi_device's iorequest_cnt if dispatch failed scsi: Revert "scsi: core: Do not increase scsi_device's iorequest_cnt if dispatch failed" scsi: storvsc: Don't pass unused PFNs to Hyper-V host scsi: ufs: core: Fix MCQ nr_hw_queues scsi: ufs: core: Rename symbol sizeof_utp_transfer_cmd_desc() scsi: ufs: core: Fix MCQ tag calculation
notif.h
// SPDX-License-Identifier: GPL-2.0
#include <linux/net.h>
#include <linux/uio.h>
#include <net/sock.h>
#include <linux/nospec.h>
#include "rsrc.h"
#define IO_NOTIF_UBUF_FLAGS (SKBFL_ZEROCOPY_FRAG | SKBFL_DONT_ORPHAN)
#define IO_NOTIF_SPLICE_BATCH 32
struct io_notif_data {
struct file *file;
struct ubuf_info uarg;
unsigned long account_pages;
bool zc_report;
bool zc_used;
bool zc_copied;
};
struct io_kiocb *io_alloc_notif(struct io_ring_ctx *ctx);
void io_notif_set_extended(struct io_kiocb *notif);
static inline struct io_notif_data *io_notif_to_data(struct io_kiocb *notif)
{
return io_kiocb_to_cmd(notif, struct io_notif_data);
}
static inline void io_notif_flush(struct io_kiocb *notif)
__must_hold(¬if->ctx->uring_lock)
{
struct io_notif_data *nd = io_notif_to_data(notif);
/* drop slot's master ref */
if (refcount_dec_and_test(&nd->uarg.refcnt))
__io_req_task_work_add(notif, IOU_F_TWQ_LAZY_WAKE);
}
static inline int io_notif_account_mem(struct io_kiocb *notif, unsigned len)
{
struct io_ring_ctx *ctx = notif->ctx;
struct io_notif_data *nd = io_notif_to_data(notif);
unsigned nr_pages = (len >> PAGE_SHIFT) + 2;
int ret;
if (ctx->user) {
ret = __io_account_mem(ctx->user, nr_pages);
if (ret)
return ret;
nd->account_pages += nr_pages;
}
return 0;
}
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