LU-5549 llite: make default_easize writeable in /proc

[fs/lustre-release.git] / lustre / llite / llite_lib.c

diff --git a/lustre/llite/llite_lib.c b/lustre/llite/llite_lib.c
index fca1a7d..f0ee6b0 100644 (file)
--- a/lustre/llite/llite_lib.c
+++ b/lustre/llite/llite_lib.c
@@ -653,6 +653,17 @@ int ll_get_max_mdsize(struct ll_sb_info *sbi, int *lmmsize)
        RETURN(rc);
 }
 
+/**
+ * Get the value of the default_easize parameter.
+ *
+ * \see client_obd::cl_default_mds_easize
+ *
+ * \param[in] sbi      superblock info for this filesystem
+ * \param[out] lmmsize pointer to storage location for value
+ *
+ * \retval 0           on success
+ * \retval negative    negated errno on failure
+ */
 int ll_get_default_mdsize(struct ll_sb_info *sbi, int *lmmsize)
 {
        int size, rc;
@@ -666,6 +677,31 @@ int ll_get_default_mdsize(struct ll_sb_info *sbi, int *lmmsize)
        RETURN(rc);
 }
 
+/**
+ * Set the default_easize parameter to the given value.
+ *
+ * \see client_obd::cl_default_mds_easize
+ *
+ * \param[in] sbi      superblock info for this filesystem
+ * \param[in] lmmsize  the size to set
+ *
+ * \retval 0           on success
+ * \retval negative    negated errno on failure
+ */
+int ll_set_default_mdsize(struct ll_sb_info *sbi, int lmmsize)
+{
+       int rc;
+
+       if (lmmsize < sizeof(struct lov_mds_md) || lmmsize > PAGE_CACHE_SIZE)
+               return -EINVAL;
+
+       rc = obd_set_info_async(NULL, sbi->ll_md_exp,
+                               sizeof(KEY_DEFAULT_EASIZE), KEY_DEFAULT_EASIZE,
+                               sizeof(int), &lmmsize, NULL);
+
+       RETURN(rc);
+}
+
 int ll_get_max_cookiesize(struct ll_sb_info *sbi, int *lmmsize)
 {
        int size, rc;