diff options
| author | Jens Axboe <axboe@kernel.dk> | 2026-03-14 17:41:04 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2026-03-17 00:32:59 +0300 |
| commit | f1a424e21c15993db0f9594cda17ef5d516ab3e9 (patch) | |
| tree | 247d9155a360b0899f77c5200a84c6bbdcdfacdf /include/linux | |
| parent | 0e46cb553f35517f9ac946de0f1a2cfab7c156b6 (diff) | |
| download | linux-f1a424e21c15993db0f9594cda17ef5d516ab3e9.tar.xz | |
io_uring: switch struct io_ring_ctx internal bitfields to flags
Bitfields cannot be set and checked atomically, and this makes it more
clear that these are indeed in shared storage and must be checked and
set in a sane fashion. This is in preparation for annotating a few of
the known racy, but harmless, flags checking.
No intended functional changes in this patch.
Reviewed-by: Gabriel Krisman Bertazi <krisman@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/io_uring_types.h | 34 |
1 files changed, 20 insertions, 14 deletions
diff --git a/include/linux/io_uring_types.h b/include/linux/io_uring_types.h index dd1420bfcb73..0b3f08adc217 100644 --- a/include/linux/io_uring_types.h +++ b/include/linux/io_uring_types.h @@ -268,24 +268,30 @@ struct io_alloc_cache { unsigned int init_clear; }; +enum { + IO_RING_F_DRAIN_NEXT = BIT(0), + IO_RING_F_OP_RESTRICTED = BIT(1), + IO_RING_F_REG_RESTRICTED = BIT(2), + IO_RING_F_OFF_TIMEOUT_USED = BIT(3), + IO_RING_F_DRAIN_ACTIVE = BIT(4), + IO_RING_F_HAS_EVFD = BIT(5), + /* all CQEs should be posted only by the submitter task */ + IO_RING_F_TASK_COMPLETE = BIT(6), + IO_RING_F_LOCKLESS_CQ = BIT(7), + IO_RING_F_SYSCALL_IOPOLL = BIT(8), + IO_RING_F_POLL_ACTIVATED = BIT(9), + IO_RING_F_DRAIN_DISABLED = BIT(10), + IO_RING_F_COMPAT = BIT(11), + IO_RING_F_IOWQ_LIMITS_SET = BIT(12), +}; + struct io_ring_ctx { /* const or read-mostly hot data */ struct { + /* ring setup flags */ unsigned int flags; - unsigned int drain_next: 1; - unsigned int op_restricted: 1; - unsigned int reg_restricted: 1; - unsigned int off_timeout_used: 1; - unsigned int drain_active: 1; - unsigned int has_evfd: 1; - /* all CQEs should be posted only by the submitter task */ - unsigned int task_complete: 1; - unsigned int lockless_cq: 1; - unsigned int syscall_iopoll: 1; - unsigned int poll_activated: 1; - unsigned int drain_disabled: 1; - unsigned int compat: 1; - unsigned int iowq_limits_set : 1; + /* internal state flags IO_RING_F_* flags , mostly read-only */ + unsigned int int_flags; struct task_struct *submitter_task; struct io_rings *rings; |