From: Chenbo Feng <fengc@google.com>
To: linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org
Cc: Sumit Semwal <sumit.semwal@linaro.org>, kernel-team@android.com
Subject: [PATCH v5 3/3] dma-buf: add show_fdinfo handler
Date: Thu, 13 Jun 2019 15:34:08 -0700 [thread overview]
Message-ID: <20190613223408.139221-4-fengc@google.com> (raw)
In-Reply-To: <20190613223408.139221-1-fengc@google.com>
From: Greg Hackmann <ghackmann@google.com>
The show_fdinfo handler exports the same information available through
debugfs on a per-buffer basis.
Signed-off-by: Greg Hackmann <ghackmann@google.com>
Signed-off-by: Chenbo Feng <fengc@google.com>
---
drivers/dma-buf/dma-buf.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/drivers/dma-buf/dma-buf.c b/drivers/dma-buf/dma-buf.c
index 2c862e36c947..49a5cb7c705d 100644
--- a/drivers/dma-buf/dma-buf.c
+++ b/drivers/dma-buf/dma-buf.c
@@ -397,6 +397,20 @@ static long dma_buf_ioctl(struct file *file,
}
}
+static void dma_buf_show_fdinfo(struct seq_file *m, struct file *file)
+{
+ struct dma_buf *dmabuf = file->private_data;
+
+ seq_printf(m, "size:\t%zu\n", dmabuf->size);
+ /* Don't count the temporary reference taken inside procfs seq_show */
+ seq_printf(m, "count:\t%ld\n", file_count(dmabuf->file) - 1);
+ seq_printf(m, "exp_name:\t%s\n", dmabuf->exp_name);
+ mutex_lock(&dmabuf->lock);
+ if (dmabuf->name)
+ seq_printf(m, "name:\t%s\n", dmabuf->name);
+ mutex_unlock(&dmabuf->lock);
+}
+
static const struct file_operations dma_buf_fops = {
.release = dma_buf_release,
.mmap = dma_buf_mmap_internal,
@@ -406,6 +420,7 @@ static const struct file_operations dma_buf_fops = {
#ifdef CONFIG_COMPAT
.compat_ioctl = dma_buf_ioctl,
#endif
+ .show_fdinfo = dma_buf_show_fdinfo,
};
/*
--
2.22.0.410.gd8fdbe21b5-goog
next prev parent reply other threads:[~2019-06-13 22:34 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-13 22:34 [PATCH v5 0/3] Improve the dma-buf tracking Chenbo Feng
2019-06-13 22:34 ` [PATCH v5 1/3] dma-buf: give each buffer a full-fledged inode Chenbo Feng
2019-06-13 22:34 ` [PATCH v5 2/3] dma-buf: add DMA_BUF_SET_NAME ioctls Chenbo Feng
2019-07-26 8:37 ` Chris Wilson
2019-06-13 22:34 ` Chenbo Feng [this message]
2019-06-14 9:34 ` [PATCH v5 0/3] Improve the dma-buf tracking Sumit Semwal
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