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[51.81.44.171]) by smtp.gmail.com with ESMTPSA id 6a1803df08f44-6f6e3a0c593sm61934686d6.64.2025.05.12.21.21.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 12 May 2025 21:21:18 -0700 (PDT) From: Chen Linxuan To: Miklos Szeredi Cc: Chen Linxuan , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] fs: fuse: add dev id to /dev/fuse fdinfo Date: Tue, 13 May 2025 12:20:49 +0800 Message-ID: <20250513042049.63619-2-chenlinxuan@uniontech.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" This commit add fuse connection device id to fdinfo of opened /dev/fuse files. Related discussions can be found at links below. Link: https://lore.kernel.org/all/CAJfpegvEYUgEbpATpQx8NqVR33Mv-VK96C+gbTag= 1CEUeBqvnA@mail.gmail.com/ Signed-off-by: Chen Linxuan --- fs/fuse/dev.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c index 6dcbaa218b7a1..a36c244e1a0b0 100644 --- a/fs/fuse/dev.c +++ b/fs/fuse/dev.c @@ -23,6 +23,7 @@ #include #include #include +#include =20 #define CREATE_TRACE_POINTS #include "fuse_trace.h" @@ -2602,6 +2603,15 @@ static long fuse_dev_ioctl(struct file *file, unsign= ed int cmd, } } =20 +static void fuse_dev_show_fdinfo(struct seq_file *seq, struct file *file) +{ + struct fuse_dev *fud =3D fuse_get_dev(file); + if (!fud) + return ; + + seq_printf(seq, "fuse_connection:\t%u\n", fud->fc->dev); +} + const struct file_operations fuse_dev_operations =3D { .owner =3D THIS_MODULE, .open =3D fuse_dev_open, @@ -2617,6 +2627,9 @@ const struct file_operations fuse_dev_operations =3D { #ifdef CONFIG_FUSE_IO_URING .uring_cmd =3D fuse_uring_cmd, #endif +#ifdef CONFIG_PROC_FS + .show_fdinfo =3D fuse_dev_show_fdinfo, +#endif }; EXPORT_SYMBOL_GPL(fuse_dev_operations); =20 --=20 2.43.0