Grow: fix hang when reshape completes too fast

[thirdparty/mdadm.git] / sysfs.c

diff --git a/sysfs.c b/sysfs.c
index 48d1f54264818097c22ba8322d03e4703e2c19dd..31c92f78b79b91c8472ae079c118b670de2a2cf7 100644 (file)
--- a/sysfs.c
+++ b/sysfs.c
@@ -466,6 +466,26 @@ int sysfs_get_ll(struct mdinfo *sra, struct mdinfo *dev,
        return 0;
 }
 
+int sysfs_get_str(struct mdinfo *sra, struct mdinfo *dev,
+                 char *name, char *buf, int buf_len)
+{
+       char fname[50];
+       int n;
+       int fd;
+
+       sprintf(fname, "/sys/block/%s/md/%s/%s",
+               sra->sys_name, dev?dev->sys_name:"", name);
+       fd = open(fname, O_RDONLY);
+       if (fd < 0)
+               return -1;
+       n = read(fd, buf, buf_len);
+       close(fd);
+       if (n <= 0)
+               return -1;
+       buf[n] = 0;
+       return 0;
+}
+
 int sysfs_set_safemode(struct mdinfo *sra, unsigned long ms)
 {
        unsigned long sec;