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io_uring-5.13-2021-06-12

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Merge tag 'io_uring-5.13-2021-06-12' of git://git.kernel.dk/linux-block

Pull io_uring fixes from Jens Axboe:
 "Just an API change for the registration changes that went into this
  release. Better to get it sorted out now than before it's too late"

* tag 'io_uring-5.13-2021-06-12' of git://git.kernel.dk/linux-block:
  io_uring: add feature flag for rsrc tags
  io_uring: change registration/upd/rsrc tagging ABI
This commit is contained in:
Linus Torvalds 2021-06-12 11:53:20 -07:00
commit b2568eeb96
2 changed files with 39 additions and 22 deletions
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42
fs/io_uring.c
View file

@ -783,6 +783,11 @@ struct io_task_work {
task_work_func_t func;
};
enum {
IORING_RSRC_FILE = 0,
IORING_RSRC_BUFFER = 1,
};
/*
* NOTE! Each of the iocb union members has the file pointer
* as the first entry in their struct definition. So you can
@ -9671,7 +9676,8 @@ static int io_uring_create(unsigned entries, struct io_uring_params *p,
IORING_FEAT_SUBMIT_STABLE | IORING_FEAT_RW_CUR_POS |
IORING_FEAT_CUR_PERSONALITY | IORING_FEAT_FAST_POLL |
IORING_FEAT_POLL_32BITS | IORING_FEAT_SQPOLL_NONFIXED |
IORING_FEAT_EXT_ARG | IORING_FEAT_NATIVE_WORKERS;
IORING_FEAT_EXT_ARG | IORING_FEAT_NATIVE_WORKERS |
IORING_FEAT_RSRC_TAGS;
if (copy_to_user(params, p, sizeof(*p))) {
ret = -EFAULT;
@ -9911,7 +9917,7 @@ static int io_register_files_update(struct io_ring_ctx *ctx, void __user *arg,
}
static int io_register_rsrc_update(struct io_ring_ctx *ctx, void __user *arg,
unsigned size)
unsigned size, unsigned type)
{
struct io_uring_rsrc_update2 up;
@ -9919,13 +9925,13 @@ static int io_register_rsrc_update(struct io_ring_ctx *ctx, void __user *arg,
return -EINVAL;
if (copy_from_user(&up, arg, sizeof(up)))
return -EFAULT;
if (!up.nr)
if (!up.nr || up.resv)
return -EINVAL;
return __io_register_rsrc_update(ctx, up.type, &up, up.nr);
return __io_register_rsrc_update(ctx, type, &up, up.nr);
}
static int io_register_rsrc(struct io_ring_ctx *ctx, void __user *arg,
unsigned int size)
unsigned int size, unsigned int type)
{
struct io_uring_rsrc_register rr;
@ -9936,10 +9942,10 @@ static int io_register_rsrc(struct io_ring_ctx *ctx, void __user *arg,
memset(&rr, 0, sizeof(rr));
if (copy_from_user(&rr, arg, size))
return -EFAULT;
if (!rr.nr)
if (!rr.nr || rr.resv || rr.resv2)
return -EINVAL;
switch (rr.type) {
switch (type) {
case IORING_RSRC_FILE:
return io_sqe_files_register(ctx, u64_to_user_ptr(rr.data),
rr.nr, u64_to_user_ptr(rr.tags));
@ -9961,8 +9967,10 @@ static bool io_register_op_must_quiesce(int op)
case IORING_REGISTER_PROBE:
case IORING_REGISTER_PERSONALITY:
case IORING_UNREGISTER_PERSONALITY:
case IORING_REGISTER_RSRC:
case IORING_REGISTER_RSRC_UPDATE:
case IORING_REGISTER_FILES2:
case IORING_REGISTER_FILES_UPDATE2:
case IORING_REGISTER_BUFFERS2:
case IORING_REGISTER_BUFFERS_UPDATE:
return false;
default:
return true;
@ -10088,11 +10096,19 @@ static int __io_uring_register(struct io_ring_ctx *ctx, unsigned opcode,
case IORING_REGISTER_RESTRICTIONS:
ret = io_register_restrictions(ctx, arg, nr_args);
break;
case IORING_REGISTER_RSRC:
ret = io_register_rsrc(ctx, arg, nr_args);
case IORING_REGISTER_FILES2:
ret = io_register_rsrc(ctx, arg, nr_args, IORING_RSRC_FILE);
break;
case IORING_REGISTER_RSRC_UPDATE:
ret = io_register_rsrc_update(ctx, arg, nr_args);
case IORING_REGISTER_FILES_UPDATE2:
ret = io_register_rsrc_update(ctx, arg, nr_args,
IORING_RSRC_FILE);
break;
case IORING_REGISTER_BUFFERS2:
ret = io_register_rsrc(ctx, arg, nr_args, IORING_RSRC_BUFFER);
break;
case IORING_REGISTER_BUFFERS_UPDATE:
ret = io_register_rsrc_update(ctx, arg, nr_args,
IORING_RSRC_BUFFER);
break;
default:
ret = -EINVAL;

19
include/uapi/linux/io_uring.h
View file

@ -280,6 +280,7 @@ struct io_uring_params {
#define IORING_FEAT_SQPOLL_NONFIXED (1U << 7)
#define IORING_FEAT_EXT_ARG (1U << 8)
#define IORING_FEAT_NATIVE_WORKERS (1U << 9)
#define IORING_FEAT_RSRC_TAGS (1U << 10)
/*
* io_uring_register(2) opcodes and arguments
@ -298,8 +299,12 @@ enum {
IORING_UNREGISTER_PERSONALITY = 10,
IORING_REGISTER_RESTRICTIONS = 11,
IORING_REGISTER_ENABLE_RINGS = 12,
IORING_REGISTER_RSRC = 13,
IORING_REGISTER_RSRC_UPDATE = 14,
/* extended with tagging */
IORING_REGISTER_FILES2 = 13,
IORING_REGISTER_FILES_UPDATE2 = 14,
IORING_REGISTER_BUFFERS2 = 15,
IORING_REGISTER_BUFFERS_UPDATE = 16,
/* this goes last */
IORING_REGISTER_LAST
@ -312,14 +317,10 @@ struct io_uring_files_update {
__aligned_u64 /* __s32 * */ fds;
};
enum {
IORING_RSRC_FILE = 0,
IORING_RSRC_BUFFER = 1,
};
struct io_uring_rsrc_register {
__u32 type;
__u32 nr;
__u32 resv;
__u64 resv2;
__aligned_u64 data;
__aligned_u64 tags;
};
@ -335,8 +336,8 @@ struct io_uring_rsrc_update2 {
__u32 resv;
__aligned_u64 data;
__aligned_u64 tags;
__u32 type;
__u32 nr;
__u32 resv2;
};
/* Skip updating fd indexes set to this value in the fd table */