Commit 69228338 authored by Jens Axboe's avatar Jens Axboe
Browse files

io_uring: unify fsize with def->work_flags 



This one was missed in the earlier conversion, should be included like
any of the other IO identity flags. Make sure we restore to RLIM_INIFITY
when dropping the personality again.

Fixes: 98447d65 ("io_uring: move io identity items into separate struct")
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 900fad45

fs/io-wq.c

+6 −2
Original line number Diff line number Diff line
@@ -187,7 +187,8 @@ static bool __io_worker_unuse(struct io_wqe *wqe, struct io_worker *worker) 
		worker->blkcg_css = NULL;

	}

#endif



	if (current->signal->rlim[RLIMIT_FSIZE].rlim_cur != RLIM_INFINITY)

		current->signal->rlim[RLIMIT_FSIZE].rlim_cur = RLIM_INFINITY;

	return dropped_lock;

}
@@ -483,7 +484,10 @@ static void io_impersonate_work(struct io_worker *worker, 
	if ((work->flags & IO_WQ_WORK_CREDS) &&

	    worker->cur_creds != work->identity->creds)

		io_wq_switch_creds(worker, work);

	if (work->flags & IO_WQ_WORK_FSIZE)

		current->signal->rlim[RLIMIT_FSIZE].rlim_cur = work->identity->fsize;

	else if (current->signal->rlim[RLIMIT_FSIZE].rlim_cur != RLIM_INFINITY)

		current->signal->rlim[RLIMIT_FSIZE].rlim_cur = RLIM_INFINITY;

	io_wq_switch_blkcg(worker, work);

#ifdef CONFIG_AUDIT

	current->loginuid = work->identity->loginuid;

fs/io-wq.h

+1 −0
Original line number Diff line number Diff line
@@ -17,6 +17,7 @@ enum { 
	IO_WQ_WORK_MM		= 128,

	IO_WQ_WORK_CREDS	= 256,

	IO_WQ_WORK_BLKCG	= 512,

	IO_WQ_WORK_FSIZE	= 1024,



	IO_WQ_HASH_SHIFT	= 24,	/* upper 8 bits are used for hash key */

};

fs/io_uring.c

+11 −12
Original line number Diff line number Diff line
@@ -753,8 +753,6 @@ struct io_op_def { 
	unsigned		pollout : 1;

	/* op supports buffer selection */

	unsigned		buffer_select : 1;

	/* needs rlimit(RLIMIT_FSIZE) assigned */

	unsigned		needs_fsize : 1;

	/* must always have async data allocated */

	unsigned		needs_async_data : 1;

	/* size of async data needed, if any */
@@ -778,10 +776,10 @@ static const struct io_op_def io_op_defs[] = { 
		.hash_reg_file		= 1,

		.unbound_nonreg_file	= 1,

		.pollout		= 1,

		.needs_fsize		= 1,

		.needs_async_data	= 1,

		.async_size		= sizeof(struct io_async_rw),

		.work_flags		= IO_WQ_WORK_MM | IO_WQ_WORK_BLKCG,

		.work_flags		= IO_WQ_WORK_MM | IO_WQ_WORK_BLKCG |

						IO_WQ_WORK_FSIZE,

	},

	[IORING_OP_FSYNC] = {

		.needs_file		= 1,
@@ -799,9 +797,8 @@ static const struct io_op_def io_op_defs[] = { 
		.hash_reg_file		= 1,

		.unbound_nonreg_file	= 1,

		.pollout		= 1,

		.needs_fsize		= 1,

		.async_size		= sizeof(struct io_async_rw),

		.work_flags		= IO_WQ_WORK_BLKCG,

		.work_flags		= IO_WQ_WORK_BLKCG | IO_WQ_WORK_FSIZE,

	},

	[IORING_OP_POLL_ADD] = {

		.needs_file		= 1,
@@ -859,8 +856,7 @@ static const struct io_op_def io_op_defs[] = { 
	},

	[IORING_OP_FALLOCATE] = {

		.needs_file		= 1,

		.needs_fsize		= 1,

		.work_flags		= IO_WQ_WORK_BLKCG,

		.work_flags		= IO_WQ_WORK_BLKCG | IO_WQ_WORK_FSIZE,

	},

	[IORING_OP_OPENAT] = {

		.work_flags		= IO_WQ_WORK_FILES | IO_WQ_WORK_BLKCG |
@@ -890,9 +886,9 @@ static const struct io_op_def io_op_defs[] = { 
		.needs_file		= 1,

		.unbound_nonreg_file	= 1,

		.pollout		= 1,

		.needs_fsize		= 1,

		.async_size		= sizeof(struct io_async_rw),

		.work_flags		= IO_WQ_WORK_MM | IO_WQ_WORK_BLKCG,

		.work_flags		= IO_WQ_WORK_MM | IO_WQ_WORK_BLKCG |

						IO_WQ_WORK_FSIZE,

	},

	[IORING_OP_FADVISE] = {

		.needs_file		= 1,
@@ -1293,8 +1289,11 @@ static bool io_grab_identity(struct io_kiocb *req) 
	struct io_identity *id = req->work.identity;

	struct io_ring_ctx *ctx = req->ctx;



	if (def->needs_fsize && id->fsize != rlimit(RLIMIT_FSIZE))

	if (def->work_flags & IO_WQ_WORK_FSIZE) {

		if (id->fsize != rlimit(RLIMIT_FSIZE))

			return false;

		req->work.flags |= IO_WQ_WORK_FSIZE;

	}



	if (!(req->work.flags & IO_WQ_WORK_FILES) &&

	    (def->work_flags & IO_WQ_WORK_FILES) &&

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