Manage: check alignment when stopping an array undergoing reshape.

[thirdparty/mdadm.git] / sysfs.c

diff --git a/sysfs.c b/sysfs.c
index b7d41a579902d1dba3be49604336a391c1a068c5..19d56aa939afc5f58a8104ebcc1bde2e3acc27ad 100644 (file)
--- a/sysfs.c
+++ b/sysfs.c
@@ -513,6 +513,49 @@ int sysfs_get_ll(struct mdinfo *sra, struct mdinfo *dev,
        return n;
 }
 
+int sysfs_fd_get_two(int fd, unsigned long long *v1, unsigned long long *v2)
+{
+       /* two numbers in this sysfs file, either
+        *  NNN (NNN)
+        * or
+        *  NNN / NNN
+        */
+       char buf[80];
+       int n;
+       char *ep, *ep2;
+
+       lseek(fd, 0, 0);
+       n = read(fd, buf, sizeof(buf));
+       if (n <= 0)
+               return -2;
+       buf[n] = 0;
+       *v1 = strtoull(buf, &ep, 0);
+       if (ep == buf || (*ep != 0 && *ep != '\n' && *ep != ' '))
+               return -1;
+       while (*ep == ' ' || *ep == '/' || *ep == '(')
+               ep++;
+       *v2 = strtoull(ep, &ep2, 0);
+       if (ep2 == ep || (*ep2 != 0 && *ep2 != '\n' && *ep2 != ' ' && *ep2 != ')')) {
+               *v2 = *v1;
+               return 1;
+       }
+       return 2;
+}
+
+int sysfs_get_two(struct mdinfo *sra, struct mdinfo *dev,
+                 char *name, unsigned long long *v1, unsigned long long *v2)
+{
+       int n;
+       int fd;
+
+       fd = sysfs_get_fd(sra, dev, name);
+       if (fd < 0)
+               return -1;
+       n = sysfs_fd_get_two(fd, v1, v2);
+       close(fd);
+       return n;
+}
+
 int sysfs_fd_get_str(int fd, char *val, int size)
 {
        int n;