LU-14792 llite: enable filesystem-wide default LMV

[fs/lustre-release.git] / lustre / lod / lproc_lod.c

diff --git a/lustre/lod/lproc_lod.c b/lustre/lod/lproc_lod.c
index 3e72da6..602ce8e 100644 (file)
--- a/lustre/lod/lproc_lod.c
+++ b/lustre/lod/lproc_lod.c
@@ -555,15 +555,27 @@ static ssize_t __qos_prio_free_store(struct kobject *kobj,
        struct lod_device *lod = dt2lod_dev(dt);
        struct lu_tgt_descs *ltd = is_mdt ? &lod->lod_mdt_descs :
                                            &lod->lod_ost_descs;
+       char buf[6], *tmp;
        unsigned int val;
        int rc;
 
-       rc = kstrtouint(buffer, 0, &val);
+       /* "100%\n\0" should be largest string */
+       if (count >= sizeof(buf))
+               return -ERANGE;
+
+       strncpy(buf, buffer, sizeof(buf));
+       buf[sizeof(buf) - 1] = '\0';
+       tmp = strchr(buf, '%');
+       if (tmp)
+               *tmp = '\0';
+
+       rc = kstrtouint(buf, 0, &val);
        if (rc)
                return rc;
 
        if (val > 100)
                return -EINVAL;
+
        ltd->ltd_qos.lq_prio_free = (val << 8) / 100;
        set_bit(LQ_DIRTY, &ltd->ltd_qos.lq_flags);
        set_bit(LQ_RESET, &ltd->ltd_qos.lq_flags);