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authorGreg Hackmann <ghackmann@google.com>2019-06-14 01:34:08 +0300
committerSumit Semwal <sumit.semwal@linaro.org>2019-06-14 12:30:51 +0300
commitbcc071110aeacd28a87525a2442dd96eab145a3c (patch)
tree9efdfb36ea404bd9ed1e96d09aa6eb7caa326002 /drivers/dma-buf
parentbb2bb903042517b8fb17b2bc21e00512f2dcac01 (diff)
downloadlinux-bcc071110aeacd28a87525a2442dd96eab145a3c.tar.xz
dma-buf: add show_fdinfo handler
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> Signed-off-by: Sumit Semwal <sumit.semwal@linaro.org> Link: https://patchwork.freedesktop.org/patch/msgid/20190613223408.139221-4-fengc@google.com
Diffstat (limited to 'drivers/dma-buf')
-rw-r--r--drivers/dma-buf/dma-buf.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/dma-buf/dma-buf.c b/drivers/dma-buf/dma-buf.c
index ab96410d1dcd..6c15deb5d4ad 100644
--- a/drivers/dma-buf/dma-buf.c
+++ b/drivers/dma-buf/dma-buf.c
@@ -401,6 +401,20 @@ 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,
@@ -410,6 +424,7 @@ static const struct file_operations dma_buf_fops = {
#ifdef CONFIG_COMPAT
.compat_ioctl = dma_buf_ioctl,
#endif
+ .show_fdinfo = dma_buf_show_fdinfo,
};
/*