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io_uring: move statx handling to its own file 

Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe 2022-05-25 06:12:18 -06:00
parent a9c210cebe
commit e0da14def1
4 changed files with 82 additions and 62 deletions
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3
io_uring/Makefile
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@ -4,5 +4,6 @@
obj-$(CONFIG_IO_URING) += io_uring.o xattr.o nop.o fs.o splice.o \
sync.o advise.o filetable.o \
openclose.o uring_cmd.o epoll.o
openclose.o uring_cmd.o epoll.o \
statx.o
obj-$(CONFIG_IO_WQ) += io-wq.o

62
io_uring/io_uring.c
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@ -101,6 +101,7 @@
#include "openclose.h"
#include "uring_cmd.h"
#include "epoll.h"
#include "statx.h"
#define IORING_MAX_ENTRIES 32768
#define IORING_MAX_CQ_ENTRIES (2 * IORING_MAX_ENTRIES)
@ -384,15 +385,6 @@ struct io_provide_buf {
__u16 bid;
};
struct io_statx {
struct file *file;
int dfd;
unsigned int mask;
unsigned int flags;
struct filename *filename;
struct statx __user *buffer;
};
struct io_shutdown {
struct file *file;
int how;
@ -4033,58 +4025,6 @@ static __maybe_unused int io_eopnotsupp_prep(struct io_kiocb *kiocb,
return -EOPNOTSUPP;
}
static int io_statx_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
{
struct io_statx *sx = io_kiocb_to_cmd(req);
const char __user *path;
if (sqe->buf_index || sqe->splice_fd_in)
return -EINVAL;
if (req->flags & REQ_F_FIXED_FILE)
return -EBADF;
sx->dfd = READ_ONCE(sqe->fd);
sx->mask = READ_ONCE(sqe->len);
path = u64_to_user_ptr(READ_ONCE(sqe->addr));
sx->buffer = u64_to_user_ptr(READ_ONCE(sqe->addr2));
sx->flags = READ_ONCE(sqe->statx_flags);
sx->filename = getname_flags(path,
getname_statx_lookup_flags(sx->flags),
NULL);
if (IS_ERR(sx->filename)) {
int ret = PTR_ERR(sx->filename);
sx->filename = NULL;
return ret;
}
req->flags |= REQ_F_NEED_CLEANUP;
return 0;
}
static int io_statx(struct io_kiocb *req, unsigned int issue_flags)
{
struct io_statx *sx = io_kiocb_to_cmd(req);
int ret;
if (issue_flags & IO_URING_F_NONBLOCK)
return -EAGAIN;
ret = do_statx(sx->dfd, sx->filename, sx->flags, sx->mask, sx->buffer);
io_req_set_res(req, ret, 0);
return IOU_OK;
}
static void io_statx_cleanup(struct io_kiocb *req)
{
struct io_statx *sx = io_kiocb_to_cmd(req);
if (sx->filename)
putname(sx->filename);
}
#if defined(CONFIG_NET)
static int io_shutdown_prep(struct io_kiocb *req,
const struct io_uring_sqe *sqe)

74
io_uring/statx.c Normal file
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@ -0,0 +1,74 @@
// SPDX-License-Identifier: GPL-2.0
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/file.h>
#include <linux/io_uring.h>
#include <uapi/linux/io_uring.h>
#include "../fs/internal.h"
#include "io_uring_types.h"
#include "io_uring.h"
#include "statx.h"
struct io_statx {
struct file *file;
int dfd;
unsigned int mask;
unsigned int flags;
struct filename *filename;
struct statx __user *buffer;
};
int io_statx_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
{
struct io_statx *sx = io_kiocb_to_cmd(req);
const char __user *path;
if (sqe->buf_index || sqe->splice_fd_in)
return -EINVAL;
if (req->flags & REQ_F_FIXED_FILE)
return -EBADF;
sx->dfd = READ_ONCE(sqe->fd);
sx->mask = READ_ONCE(sqe->len);
path = u64_to_user_ptr(READ_ONCE(sqe->addr));
sx->buffer = u64_to_user_ptr(READ_ONCE(sqe->addr2));
sx->flags = READ_ONCE(sqe->statx_flags);
sx->filename = getname_flags(path,
getname_statx_lookup_flags(sx->flags),
NULL);
if (IS_ERR(sx->filename)) {
int ret = PTR_ERR(sx->filename);
sx->filename = NULL;
return ret;
}
req->flags |= REQ_F_NEED_CLEANUP;
return 0;
}
int io_statx(struct io_kiocb *req, unsigned int issue_flags)
{
struct io_statx *sx = io_kiocb_to_cmd(req);
int ret;
if (issue_flags & IO_URING_F_NONBLOCK)
return -EAGAIN;
ret = do_statx(sx->dfd, sx->filename, sx->flags, sx->mask, sx->buffer);
io_req_set_res(req, ret, 0);
return IOU_OK;
}
void io_statx_cleanup(struct io_kiocb *req)
{
struct io_statx *sx = io_kiocb_to_cmd(req);
if (sx->filename)
putname(sx->filename);
}

5
io_uring/statx.h Normal file
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@ -0,0 +1,5 @@
// SPDX-License-Identifier: GPL-2.0
int io_statx_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe);
int io_statx(struct io_kiocb *req, unsigned int issue_flags);
void io_statx_cleanup(struct io_kiocb *req);