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-rw-r--r--io_uring/filetable.h11
-rw-r--r--io_uring/io-wq.h17
-rw-r--r--io_uring/io_uring.h4
-rw-r--r--io_uring/io_uring_types.h530
-rw-r--r--io_uring/refs.h2
5 files changed, 5 insertions, 559 deletions
diff --git a/io_uring/filetable.h b/io_uring/filetable.h
index c404360f7090..6b58aa48bc45 100644
--- a/io_uring/filetable.h
+++ b/io_uring/filetable.h
@@ -22,17 +22,6 @@ struct io_kiocb;
#endif
#define FFS_MASK ~(FFS_NOWAIT|FFS_ISREG|FFS_SCM)
-struct io_fixed_file {
- /* file * with additional FFS_* flags */
- unsigned long file_ptr;
-};
-
-struct io_file_table {
- struct io_fixed_file *files;
- unsigned long *bitmap;
- unsigned int alloc_hint;
-};
-
bool io_alloc_file_tables(struct io_file_table *table, unsigned nr_files);
void io_free_file_tables(struct io_file_table *table);
diff --git a/io_uring/io-wq.h b/io_uring/io-wq.h
index 3f54ee2a8eeb..10b80ef78bb8 100644
--- a/io_uring/io-wq.h
+++ b/io_uring/io-wq.h
@@ -2,6 +2,7 @@
#define INTERNAL_IO_WQ_H
#include <linux/refcount.h>
+#include <linux/io_uring_types.h>
struct io_wq;
@@ -20,15 +21,6 @@ enum io_wq_cancel {
IO_WQ_CANCEL_NOTFOUND, /* work not found */
};
-struct io_wq_work_node {
- struct io_wq_work_node *next;
-};
-
-struct io_wq_work_list {
- struct io_wq_work_node *first;
- struct io_wq_work_node *last;
-};
-
#define wq_list_for_each(pos, prv, head) \
for (pos = (head)->first, prv = NULL; pos; prv = pos, pos = (pos)->next)
@@ -152,13 +144,6 @@ struct io_wq_work_node *wq_stack_extract(struct io_wq_work_node *stack)
return node;
}
-struct io_wq_work {
- struct io_wq_work_node list;
- unsigned flags;
- /* place it here instead of io_kiocb as it fills padding and saves 4B */
- int cancel_seq;
-};
-
static inline struct io_wq_work *wq_next_work(struct io_wq_work *work)
{
if (!work->list.next)
diff --git a/io_uring/io_uring.h b/io_uring/io_uring.h
index 558a860a93fc..5eaa01c4697c 100644
--- a/io_uring/io_uring.h
+++ b/io_uring/io_uring.h
@@ -3,7 +3,9 @@
#include <linux/errno.h>
#include <linux/lockdep.h>
-#include "io_uring_types.h"
+#include <linux/io_uring_types.h>
+#include "io-wq.h"
+#include "filetable.h"
#ifndef CREATE_TRACE_POINTS
#include <trace/events/io_uring.h>
diff --git a/io_uring/io_uring_types.h b/io_uring/io_uring_types.h
deleted file mode 100644
index 65ac7cdaaa73..000000000000
--- a/io_uring/io_uring_types.h
+++ /dev/null
@@ -1,530 +0,0 @@
-#ifndef IO_URING_TYPES_H
-#define IO_URING_TYPES_H
-
-#include <linux/blkdev.h>
-#include <linux/task_work.h>
-#include <linux/bitmap.h>
-#include <uapi/linux/io_uring.h>
-
-#include "io-wq.h"
-#include "filetable.h"
-
-struct io_hash_bucket {
- spinlock_t lock;
- struct hlist_head list;
-} ____cacheline_aligned_in_smp;
-
-struct io_hash_table {
- struct io_hash_bucket *hbs;
- unsigned hash_bits;
-};
-
-struct io_uring {
- u32 head ____cacheline_aligned_in_smp;
- u32 tail ____cacheline_aligned_in_smp;
-};
-
-/*
- * This data is shared with the application through the mmap at offsets
- * IORING_OFF_SQ_RING and IORING_OFF_CQ_RING.
- *
- * The offsets to the member fields are published through struct
- * io_sqring_offsets when calling io_uring_setup.
- */
-struct io_rings {
- /*
- * Head and tail offsets into the ring; the offsets need to be
- * masked to get valid indices.
- *
- * The kernel controls head of the sq ring and the tail of the cq ring,
- * and the application controls tail of the sq ring and the head of the
- * cq ring.
- */
- struct io_uring sq, cq;
- /*
- * Bitmasks to apply to head and tail offsets (constant, equals
- * ring_entries - 1)
- */
- u32 sq_ring_mask, cq_ring_mask;
- /* Ring sizes (constant, power of 2) */
- u32 sq_ring_entries, cq_ring_entries;
- /*
- * Number of invalid entries dropped by the kernel due to
- * invalid index stored in array
- *
- * Written by the kernel, shouldn't be modified by the
- * application (i.e. get number of "new events" by comparing to
- * cached value).
- *
- * After a new SQ head value was read by the application this
- * counter includes all submissions that were dropped reaching
- * the new SQ head (and possibly more).
- */
- u32 sq_dropped;
- /*
- * Runtime SQ flags
- *
- * Written by the kernel, shouldn't be modified by the
- * application.
- *
- * The application needs a full memory barrier before checking
- * for IORING_SQ_NEED_WAKEUP after updating the sq tail.
- */
- atomic_t sq_flags;
- /*
- * Runtime CQ flags
- *
- * Written by the application, shouldn't be modified by the
- * kernel.
- */
- u32 cq_flags;
- /*
- * Number of completion events lost because the queue was full;
- * this should be avoided by the application by making sure
- * there are not more requests pending than there is space in
- * the completion queue.
- *
- * Written by the kernel, shouldn't be modified by the
- * application (i.e. get number of "new events" by comparing to
- * cached value).
- *
- * As completion events come in out of order this counter is not
- * ordered with any other data.
- */
- u32 cq_overflow;
- /*
- * Ring buffer of completion events.
- *
- * The kernel writes completion events fresh every time they are
- * produced, so the application is allowed to modify pending
- * entries.
- */
- struct io_uring_cqe cqes[] ____cacheline_aligned_in_smp;
-};
-
-struct io_restriction {
- DECLARE_BITMAP(register_op, IORING_REGISTER_LAST);
- DECLARE_BITMAP(sqe_op, IORING_OP_LAST);
- u8 sqe_flags_allowed;
- u8 sqe_flags_required;
- bool registered;
-};
-
-struct io_submit_link {
- struct io_kiocb *head;
- struct io_kiocb *last;
-};
-
-struct io_submit_state {
- /* inline/task_work completion list, under ->uring_lock */
- struct io_wq_work_node free_list;
- /* batch completion logic */
- struct io_wq_work_list compl_reqs;
- struct io_submit_link link;
-
- bool plug_started;
- bool need_plug;
- bool flush_cqes;
- unsigned short submit_nr;
- struct blk_plug plug;
-};
-
-struct io_ev_fd {
- struct eventfd_ctx *cq_ev_fd;
- unsigned int eventfd_async: 1;
- struct rcu_head rcu;
-};
-
-struct io_ring_ctx {
- /* const or read-mostly hot data */
- struct {
- struct percpu_ref refs;
-
- struct io_rings *rings;
- unsigned int flags;
- enum task_work_notify_mode notify_method;
- unsigned int compat: 1;
- unsigned int drain_next: 1;
- unsigned int restricted: 1;
- unsigned int off_timeout_used: 1;
- unsigned int drain_active: 1;
- unsigned int drain_disabled: 1;
- unsigned int has_evfd: 1;
- unsigned int syscall_iopoll: 1;
- } ____cacheline_aligned_in_smp;
-
- /* submission data */
- struct {
- struct mutex uring_lock;
-
- /*
- * Ring buffer of indices into array of io_uring_sqe, which is
- * mmapped by the application using the IORING_OFF_SQES offset.
- *
- * This indirection could e.g. be used to assign fixed
- * io_uring_sqe entries to operations and only submit them to
- * the queue when needed.
- *
- * The kernel modifies neither the indices array nor the entries
- * array.
- */
- u32 *sq_array;
- struct io_uring_sqe *sq_sqes;
- unsigned cached_sq_head;
- unsigned sq_entries;
-
- /*
- * Fixed resources fast path, should be accessed only under
- * uring_lock, and updated through io_uring_register(2)
- */
- struct io_rsrc_node *rsrc_node;
- int rsrc_cached_refs;
- atomic_t cancel_seq;
- struct io_file_table file_table;
- unsigned nr_user_files;
- unsigned nr_user_bufs;
- struct io_mapped_ubuf **user_bufs;
-
- struct io_submit_state submit_state;
-
- struct io_buffer_list *io_bl;
- struct xarray io_bl_xa;
- struct list_head io_buffers_cache;
-
- struct io_hash_table cancel_table_locked;
- struct list_head cq_overflow_list;
- struct list_head apoll_cache;
- struct xarray personalities;
- u32 pers_next;
- } ____cacheline_aligned_in_smp;
-
- /* IRQ completion list, under ->completion_lock */
- struct io_wq_work_list locked_free_list;
- unsigned int locked_free_nr;
-
- const struct cred *sq_creds; /* cred used for __io_sq_thread() */
- struct io_sq_data *sq_data; /* if using sq thread polling */
-
- struct wait_queue_head sqo_sq_wait;
- struct list_head sqd_list;
-
- unsigned long check_cq;
-
- struct {
- /*
- * We cache a range of free CQEs we can use, once exhausted it
- * should go through a slower range setup, see __io_get_cqe()
- */
- struct io_uring_cqe *cqe_cached;
- struct io_uring_cqe *cqe_sentinel;
-
- unsigned cached_cq_tail;
- unsigned cq_entries;
- struct io_ev_fd __rcu *io_ev_fd;
- struct wait_queue_head cq_wait;
- unsigned cq_extra;
- } ____cacheline_aligned_in_smp;
-
- struct {
- spinlock_t completion_lock;
-
- /*
- * ->iopoll_list is protected by the ctx->uring_lock for
- * io_uring instances that don't use IORING_SETUP_SQPOLL.
- * For SQPOLL, only the single threaded io_sq_thread() will
- * manipulate the list, hence no extra locking is needed there.
- */
- struct io_wq_work_list iopoll_list;
- struct io_hash_table cancel_table;
- bool poll_multi_queue;
-
- struct list_head io_buffers_comp;
- } ____cacheline_aligned_in_smp;
-
- /* timeouts */
- struct {
- spinlock_t timeout_lock;
- atomic_t cq_timeouts;
- struct list_head timeout_list;
- struct list_head ltimeout_list;
- unsigned cq_last_tm_flush;
- } ____cacheline_aligned_in_smp;
-
- /* Keep this last, we don't need it for the fast path */
-
- struct io_restriction restrictions;
- struct task_struct *submitter_task;
-
- /* slow path rsrc auxilary data, used by update/register */
- struct io_rsrc_node *rsrc_backup_node;
- struct io_mapped_ubuf *dummy_ubuf;
- struct io_rsrc_data *file_data;
- struct io_rsrc_data *buf_data;
-
- struct delayed_work rsrc_put_work;
- struct llist_head rsrc_put_llist;
- struct list_head rsrc_ref_list;
- spinlock_t rsrc_ref_lock;
-
- struct list_head io_buffers_pages;
-
- #if defined(CONFIG_UNIX)
- struct socket *ring_sock;
- #endif
- /* hashed buffered write serialization */
- struct io_wq_hash *hash_map;
-
- /* Only used for accounting purposes */
- struct user_struct *user;
- struct mm_struct *mm_account;
-
- /* ctx exit and cancelation */
- struct llist_head fallback_llist;
- struct delayed_work fallback_work;
- struct work_struct exit_work;
- struct list_head tctx_list;
- struct completion ref_comp;
-
- /* io-wq management, e.g. thread count */
- u32 iowq_limits[2];
- bool iowq_limits_set;
-
- struct list_head defer_list;
- unsigned sq_thread_idle;
-};
-
-enum {
- REQ_F_FIXED_FILE_BIT = IOSQE_FIXED_FILE_BIT,
- REQ_F_IO_DRAIN_BIT = IOSQE_IO_DRAIN_BIT,
- REQ_F_LINK_BIT = IOSQE_IO_LINK_BIT,
- REQ_F_HARDLINK_BIT = IOSQE_IO_HARDLINK_BIT,
- REQ_F_FORCE_ASYNC_BIT = IOSQE_ASYNC_BIT,
- REQ_F_BUFFER_SELECT_BIT = IOSQE_BUFFER_SELECT_BIT,
- REQ_F_CQE_SKIP_BIT = IOSQE_CQE_SKIP_SUCCESS_BIT,
-
- /* first byte is taken by user flags, shift it to not overlap */
- REQ_F_FAIL_BIT = 8,
- REQ_F_INFLIGHT_BIT,
- REQ_F_CUR_POS_BIT,
- REQ_F_NOWAIT_BIT,
- REQ_F_LINK_TIMEOUT_BIT,
- REQ_F_NEED_CLEANUP_BIT,
- REQ_F_POLLED_BIT,
- REQ_F_BUFFER_SELECTED_BIT,
- REQ_F_BUFFER_RING_BIT,
- REQ_F_REISSUE_BIT,
- REQ_F_CREDS_BIT,
- REQ_F_REFCOUNT_BIT,
- REQ_F_ARM_LTIMEOUT_BIT,
- REQ_F_ASYNC_DATA_BIT,
- REQ_F_SKIP_LINK_CQES_BIT,
- REQ_F_SINGLE_POLL_BIT,
- REQ_F_DOUBLE_POLL_BIT,
- REQ_F_PARTIAL_IO_BIT,
- REQ_F_CQE32_INIT_BIT,
- REQ_F_APOLL_MULTISHOT_BIT,
- REQ_F_CLEAR_POLLIN_BIT,
- REQ_F_HASH_LOCKED_BIT,
- /* keep async read/write and isreg together and in order */
- REQ_F_SUPPORT_NOWAIT_BIT,
- REQ_F_ISREG_BIT,
-
- /* not a real bit, just to check we're not overflowing the space */
- __REQ_F_LAST_BIT,
-};
-
-enum {
- /* ctx owns file */
- REQ_F_FIXED_FILE = BIT(REQ_F_FIXED_FILE_BIT),
- /* drain existing IO first */
- REQ_F_IO_DRAIN = BIT(REQ_F_IO_DRAIN_BIT),
- /* linked sqes */
- REQ_F_LINK = BIT(REQ_F_LINK_BIT),
- /* doesn't sever on completion < 0 */
- REQ_F_HARDLINK = BIT(REQ_F_HARDLINK_BIT),
- /* IOSQE_ASYNC */
- REQ_F_FORCE_ASYNC = BIT(REQ_F_FORCE_ASYNC_BIT),
- /* IOSQE_BUFFER_SELECT */
- REQ_F_BUFFER_SELECT = BIT(REQ_F_BUFFER_SELECT_BIT),
- /* IOSQE_CQE_SKIP_SUCCESS */
- REQ_F_CQE_SKIP = BIT(REQ_F_CQE_SKIP_BIT),
-
- /* fail rest of links */
- REQ_F_FAIL = BIT(REQ_F_FAIL_BIT),
- /* on inflight list, should be cancelled and waited on exit reliably */
- REQ_F_INFLIGHT = BIT(REQ_F_INFLIGHT_BIT),
- /* read/write uses file position */
- REQ_F_CUR_POS = BIT(REQ_F_CUR_POS_BIT),
- /* must not punt to workers */
- REQ_F_NOWAIT = BIT(REQ_F_NOWAIT_BIT),
- /* has or had linked timeout */
- REQ_F_LINK_TIMEOUT = BIT(REQ_F_LINK_TIMEOUT_BIT),
- /* needs cleanup */
- REQ_F_NEED_CLEANUP = BIT(REQ_F_NEED_CLEANUP_BIT),
- /* already went through poll handler */
- REQ_F_POLLED = BIT(REQ_F_POLLED_BIT),
- /* buffer already selected */
- REQ_F_BUFFER_SELECTED = BIT(REQ_F_BUFFER_SELECTED_BIT),
- /* buffer selected from ring, needs commit */
- REQ_F_BUFFER_RING = BIT(REQ_F_BUFFER_RING_BIT),
- /* caller should reissue async */
- REQ_F_REISSUE = BIT(REQ_F_REISSUE_BIT),
- /* supports async reads/writes */
- REQ_F_SUPPORT_NOWAIT = BIT(REQ_F_SUPPORT_NOWAIT_BIT),
- /* regular file */
- REQ_F_ISREG = BIT(REQ_F_ISREG_BIT),
- /* has creds assigned */
- REQ_F_CREDS = BIT(REQ_F_CREDS_BIT),
- /* skip refcounting if not set */
- REQ_F_REFCOUNT = BIT(REQ_F_REFCOUNT_BIT),
- /* there is a linked timeout that has to be armed */
- REQ_F_ARM_LTIMEOUT = BIT(REQ_F_ARM_LTIMEOUT_BIT),
- /* ->async_data allocated */
- REQ_F_ASYNC_DATA = BIT(REQ_F_ASYNC_DATA_BIT),
- /* don't post CQEs while failing linked requests */
- REQ_F_SKIP_LINK_CQES = BIT(REQ_F_SKIP_LINK_CQES_BIT),
- /* single poll may be active */
- REQ_F_SINGLE_POLL = BIT(REQ_F_SINGLE_POLL_BIT),
- /* double poll may active */
- REQ_F_DOUBLE_POLL = BIT(REQ_F_DOUBLE_POLL_BIT),
- /* request has already done partial IO */
- REQ_F_PARTIAL_IO = BIT(REQ_F_PARTIAL_IO_BIT),
- /* fast poll multishot mode */
- REQ_F_APOLL_MULTISHOT = BIT(REQ_F_APOLL_MULTISHOT_BIT),
- /* ->extra1 and ->extra2 are initialised */
- REQ_F_CQE32_INIT = BIT(REQ_F_CQE32_INIT_BIT),
- /* recvmsg special flag, clear EPOLLIN */
- REQ_F_CLEAR_POLLIN = BIT(REQ_F_CLEAR_POLLIN_BIT),
- /* hashed into ->cancel_hash_locked, protected by ->uring_lock */
- REQ_F_HASH_LOCKED = BIT(REQ_F_HASH_LOCKED_BIT),
-};
-
-typedef void (*io_req_tw_func_t)(struct io_kiocb *req, bool *locked);
-
-struct io_task_work {
- union {
- struct io_wq_work_node node;
- struct llist_node fallback_node;
- };
- io_req_tw_func_t func;
-};
-
-struct io_cqe {
- __u64 user_data;
- __s32 res;
- /* fd initially, then cflags for completion */
- union {
- __u32 flags;
- int fd;
- };
-};
-
-/*
- * Each request type overlays its private data structure on top of this one.
- * They must not exceed this one in size.
- */
-struct io_cmd_data {
- struct file *file;
- /* each command gets 56 bytes of data */
- __u8 data[56];
-};
-
-#define io_kiocb_to_cmd(req) ((void *) &(req)->cmd)
-#define cmd_to_io_kiocb(ptr) ((struct io_kiocb *) ptr)
-
-struct io_kiocb {
- union {
- /*
- * NOTE! Each of the io_kiocb union members has the file pointer
- * as the first entry in their struct definition. So you can
- * access the file pointer through any of the sub-structs,
- * or directly as just 'file' in this struct.
- */
- struct file *file;
- struct io_cmd_data cmd;
- };
-
- u8 opcode;
- /* polled IO has completed */
- u8 iopoll_completed;
- /*
- * Can be either a fixed buffer index, or used with provided buffers.
- * For the latter, before issue it points to the buffer group ID,
- * and after selection it points to the buffer ID itself.
- */
- u16 buf_index;
- unsigned int flags;
-
- struct io_cqe cqe;
-
- struct io_ring_ctx *ctx;
- struct task_struct *task;
-
- struct io_rsrc_node *rsrc_node;
-
- union {
- /* store used ubuf, so we can prevent reloading */
- struct io_mapped_ubuf *imu;
-
- /* stores selected buf, valid IFF REQ_F_BUFFER_SELECTED is set */
- struct io_buffer *kbuf;
-
- /*
- * stores buffer ID for ring provided buffers, valid IFF
- * REQ_F_BUFFER_RING is set.
- */
- struct io_buffer_list *buf_list;
- };
-
- union {
- /* used by request caches, completion batching and iopoll */
- struct io_wq_work_node comp_list;
- /* cache ->apoll->events */
- __poll_t apoll_events;
- };
- atomic_t refs;
- atomic_t poll_refs;
- struct io_task_work io_task_work;
- /* for polled requests, i.e. IORING_OP_POLL_ADD and async armed poll */
- union {
- struct hlist_node hash_node;
- struct {
- u64 extra1;
- u64 extra2;
- };
- };
- /* internal polling, see IORING_FEAT_FAST_POLL */
- struct async_poll *apoll;
- /* opcode allocated if it needs to store data for async defer */
- void *async_data;
- /* linked requests, IFF REQ_F_HARDLINK or REQ_F_LINK are set */
- struct io_kiocb *link;
- /* custom credentials, valid IFF REQ_F_CREDS is set */
- const struct cred *creds;
- struct io_wq_work work;
-};
-
-struct io_cancel_data {
- struct io_ring_ctx *ctx;
- union {
- u64 data;
- struct file *file;
- };
- u32 flags;
- int seq;
-};
-
-struct io_overflow_cqe {
- struct list_head list;
- struct io_uring_cqe cqe;
-};
-
-struct io_mapped_ubuf {
- u64 ubuf;
- u64 ubuf_end;
- unsigned int nr_bvecs;
- unsigned long acct_pages;
- struct bio_vec bvec[];
-};
-
-#endif
diff --git a/io_uring/refs.h b/io_uring/refs.h
index 334c5ead4c43..1336de3f2a30 100644
--- a/io_uring/refs.h
+++ b/io_uring/refs.h
@@ -2,7 +2,7 @@
#define IOU_REQ_REF_H
#include <linux/atomic.h>
-#include "io_uring_types.h"
+#include <linux/io_uring_types.h>
/*
* Shamelessly stolen from the mm implementation of page reference checking,
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-02 08:24:41 +0000