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From: Jens Axboe <[email protected]>
To: [email protected]
Cc: Jens Axboe <[email protected]>
Subject: [PATCH 3/4] io_uring: add ->needs_fs to the opcode requirements table
Date: Fri,  7 Feb 2020 08:50:38 -0700	[thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>

Set it for openat/openat2/statx, as they all potentially need relative
path lookups if AT_FDCWD is used.

Signed-off-by: Jens Axboe <[email protected]>
---
 fs/io_uring.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index da6a5998fa30..957de0f99bcd 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -616,6 +616,8 @@ struct io_op_def {
 	unsigned		not_supported : 1;
 	/* needs file table */
 	unsigned		file_table : 1;
+	/* needs ->fs assigned */
+	unsigned		needs_fs : 1;
 };
 
 static const struct io_op_def io_op_defs[] = {
@@ -694,6 +696,7 @@ static const struct io_op_def io_op_defs[] = {
 		.needs_file		= 1,
 		.fd_non_neg		= 1,
 		.file_table		= 1,
+		.needs_fs		= 1,
 	},
 	[IORING_OP_CLOSE] = {
 		.needs_file		= 1,
@@ -707,6 +710,7 @@ static const struct io_op_def io_op_defs[] = {
 		.needs_mm		= 1,
 		.needs_file		= 1,
 		.fd_non_neg		= 1,
+		.needs_fs		= 1,
 	},
 	[IORING_OP_READ] = {
 		.needs_mm		= 1,
@@ -738,6 +742,7 @@ static const struct io_op_def io_op_defs[] = {
 		.needs_file		= 1,
 		.fd_non_neg		= 1,
 		.file_table		= 1,
+		.needs_fs		= 1,
 	},
 	[IORING_OP_EPOLL_CTL] = {
 		.unbound_nonreg_file	= 1,
@@ -911,6 +916,8 @@ static inline void io_req_work_grab_env(struct io_kiocb *req,
 	}
 	if (!req->work.creds)
 		req->work.creds = get_current_cred();
+	if (!req->work.fs && def->needs_fs)
+		req->work.fs = req->ctx->fs;
 }
 
 static inline void io_req_work_drop_env(struct io_kiocb *req)
-- 
2.25.0


  parent reply	other threads:[~2020-02-07 15:50 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-02-07 15:50 [PATCHSET 0/4] Allow relative lookups Jens Axboe
2020-02-07 15:50 ` [PATCH 1/4] io_uring: grab owning task fs_struct Jens Axboe
2020-02-07 15:50 ` [PATCH 2/4] io-wq: add support for inheriting ->fs Jens Axboe
2020-02-07 15:50 ` Jens Axboe [this message]
2020-02-07 15:50 ` [PATCH 4/4] io_uring: allow AT_FDCWD for non-file openat/openat2/statx Jens Axboe
2020-02-07 21:56 ` [PATCHSET 0/4] Allow relative lookups Stefan Metzmacher
2020-02-07 22:47   ` Jens Axboe
2020-02-07 22:56     ` Stefan Metzmacher
2020-02-07 23:07       ` Stefan Metzmacher
2020-02-08 20:05       ` Jens Axboe

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