[Intel-gfx] [PATCH i-g-t 3/8] libdrmclients: Record client drm minor

[Tvrtko Ursulin]

From: Tvrtko Ursulin <tvrtko.ursu...@intel.com>

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

Signed-off-by: Tvrtko Ursulin <tvrtko.ursu...@intel.com>
---
 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 eabd43773f2d..c23a3fae9793 100644
--- a/lib/igt_drm_clients.c
+++ b/lib/igt_drm_clients.c
@@ -115,7 +115,7 @@ 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;
 
@@ -140,6 +140,7 @@ 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));
@@ -286,16 +287,21 @@ 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;
 }
 
 /**
@@ -348,10 +354,10 @@ 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;
@@ -393,7 +399,7 @@ 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),
@@ -412,7 +418,7 @@ 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 bced19adb055..ffa219c9c9fd 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 name[24]; /* Process name of the owning PID. */
        char print_name[24]; /* Name without any non-printable characters. */
-- 
2.34.1