[PATCH i-g-t 3/8] lib/igt_drm_clients: Record client drm minor

[Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxxxxxxxx>]

From: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>

Prepare for supporting clients belonging to multiple DRM cards by storing
the DRM minor in the client record.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
---
 lib/igt_drm_clients.c | 22 ++++++++++++++--------
 lib/igt_drm_clients.h |  1 +
 2 files changed, 15 insertions(+), 8 deletions(-)

diff --git a/lib/igt_drm_clients.c b/lib/igt_drm_clients.c
index d06fcb0942a1..b837450301dc 100644
--- a/lib/igt_drm_clients.c
+++ b/lib/igt_drm_clients.c
@@ -124,7 +124,7 @@ igt_drm_client_update(struct igt_drm_client *c, unsigned int pid, char *name,
 static void
 igt_drm_client_add(struct igt_drm_clients *clients,
 		   const struct drm_client_fdinfo *info,
-		   unsigned int pid, char *name)
+		   unsigned int pid, char *name, unsigned int drm_minor)
 {
 	struct igt_drm_client *c;
 
@@ -149,6 +149,7 @@ igt_drm_client_add(struct igt_drm_clients *clients,
 	}
 
 	c->id = info->id;
+	c->drm_minor = drm_minor;
 	c->clients = clients;
 	c->val = calloc(clients->num_classes, sizeof(c->val));
 	c->last = calloc(clients->num_classes, sizeof(c->last));
@@ -295,16 +296,21 @@ static bool get_task_name(const char *buffer, char *out, unsigned long sz)
 	return true;
 }
 
-static bool is_drm_fd(int fd_dir, const char *name)
+static bool is_drm_fd(int fd_dir, const char *name, unsigned int *minor)
 {
 	struct stat stat;
 	int ret;
 
 	ret = fstatat(fd_dir, name, &stat, 0);
 
-	return ret == 0 &&
-	       (stat.st_mode & S_IFMT) == S_IFCHR &&
-	       major(stat.st_rdev) == 226;
+	if (ret == 0 &&
+	    (stat.st_mode & S_IFMT) == S_IFCHR &&
+	    major(stat.st_rdev) == 226) {
+		*minor = minor(stat.st_rdev);
+		return true;
+	}
+
+	return false;
 }
 
 static void clients_update_max_lengths(struct igt_drm_clients *clients)
@@ -382,10 +388,10 @@ igt_drm_clients_scan(struct igt_drm_clients *clients,
 		return clients;
 
 	while ((proc_dent = readdir(proc_dir)) != NULL) {
+		unsigned int client_pid, minor = 0;
 		int pid_dir = -1, fd_dir = -1;
 		struct dirent *fdinfo_dent;
 		char client_name[64] = { };
-		unsigned int client_pid;
 		DIR *fdinfo_dir = NULL;
 		char buf[4096];
 		size_t count;
@@ -427,7 +433,7 @@ igt_drm_clients_scan(struct igt_drm_clients *clients,
 			if (!isdigit(fdinfo_dent->d_name[0]))
 				continue;
 
-			if (!is_drm_fd(fd_dir, fdinfo_dent->d_name))
+			if (!is_drm_fd(fd_dir, fdinfo_dent->d_name, &minor))
 				continue;
 
 			if (!__igt_parse_drm_fdinfo(dirfd(fdinfo_dir),
@@ -446,7 +452,7 @@ igt_drm_clients_scan(struct igt_drm_clients *clients,
 						info.id);
 			if (!c)
 				igt_drm_client_add(clients, &info, client_pid,
-						   client_name);
+						   client_name, minor);
 			else
 				igt_drm_client_update(c, client_pid,
 						      client_name, &info);
diff --git a/lib/igt_drm_clients.h b/lib/igt_drm_clients.h
index 431bf5bbd335..591725b8c059 100644
--- a/lib/igt_drm_clients.h
+++ b/lib/igt_drm_clients.h
@@ -44,6 +44,7 @@ struct igt_drm_client {
 
 	enum igt_drm_client_status status;
 	unsigned int id; /* DRM client id from fdinfo. */
+	unsigned int drm_minor; /* DRM minor of this client. */
 	unsigned int pid; /* PID which has this DRM fd open. */
 	char pid_str[10]; /* Cached PID representation. */
 	char name[24]; /* Process name of the owning PID. */
-- 
2.37.2