LU-5549 llite: make default_easize writeable in /proc

[fs/lustre-release.git] / lustre / lmv / lmv_obd.c

diff --git a/lustre/lmv/lmv_obd.c b/lustre/lmv/lmv_obd.c
index c13e91a..64b6f15 100644 (file)
--- a/lustre/lmv/lmv_obd.c
+++ b/lustre/lmv/lmv_obd.c
@@ -2745,6 +2745,22 @@ static int lmv_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
         RETURN(rc);
 }
 
+/**
+ * Get by key a value associated with a LMV device.
+ *
+ * Dispatch request to lower-layer devices as needed.
+ *
+ * \param[in] env              execution environment for this thread
+ * \param[in] exp              export for the LMV device
+ * \param[in] keylen           length of key identifier
+ * \param[in] key              identifier of key to get value for
+ * \param[in] vallen           size of \a val
+ * \param[out] val             pointer to storage location for value
+ * \param[in] lsm              optional striping metadata of object
+ *
+ * \retval 0           on success
+ * \retval negative    negated errno on failure
+ */
 static int lmv_get_info(const struct lu_env *env, struct obd_export *exp,
                         __u32 keylen, void *key, __u32 *vallen, void *val,
                         struct lov_stripe_md *lsm)
@@ -2810,26 +2826,43 @@ static int lmv_get_info(const struct lu_env *env, struct obd_export *exp,
         RETURN(-EINVAL);
 }
 
+/**
+ * Asynchronously set by key a value associated with a LMV device.
+ *
+ * Dispatch request to lower-layer devices as needed.
+ *
+ * \param[in] env      execution environment for this thread
+ * \param[in] exp      export for the LMV device
+ * \param[in] keylen   length of key identifier
+ * \param[in] key      identifier of key to store value for
+ * \param[in] vallen   size of value to store
+ * \param[in] val      pointer to data to be stored
+ * \param[in] set      optional list of related ptlrpc requests
+ *
+ * \retval 0           on success
+ * \retval negative    negated errno on failure
+ */
 int lmv_set_info_async(const struct lu_env *env, struct obd_export *exp,
-                       obd_count keylen, void *key, obd_count vallen,
-                       void *val, struct ptlrpc_request_set *set)
+                      obd_count keylen, void *key, obd_count vallen,
+                      void *val, struct ptlrpc_request_set *set)
 {
-       struct lmv_tgt_desc    *tgt = NULL;
-        struct obd_device      *obd;
-        struct lmv_obd         *lmv;
-        int rc = 0;
-        ENTRY;
+       struct lmv_tgt_desc     *tgt = NULL;
+       struct obd_device       *obd;
+       struct lmv_obd          *lmv;
+       int rc = 0;
+       ENTRY;
 
-        obd = class_exp2obd(exp);
-        if (obd == NULL) {
-                CDEBUG(D_IOCTL, "Invalid client cookie "LPX64"\n",
-                       exp->exp_handle.h_cookie);
-                RETURN(-EINVAL);
-        }
-        lmv = &obd->u.lmv;
+       obd = class_exp2obd(exp);
+       if (obd == NULL) {
+               CDEBUG(D_IOCTL, "Invalid client cookie "LPX64"\n",
+                      exp->exp_handle.h_cookie);
+               RETURN(-EINVAL);
+       }
+       lmv = &obd->u.lmv;
 
-        if (KEY_IS(KEY_READ_ONLY) || KEY_IS(KEY_FLUSH_CTX)) {
-                int i, err = 0;
+       if (KEY_IS(KEY_READ_ONLY) || KEY_IS(KEY_FLUSH_CTX) ||
+           KEY_IS(KEY_DEFAULT_EASIZE)) {
+               int i, err = 0;
 
                for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
                        tgt = lmv->tgts[i];
@@ -2837,16 +2870,16 @@ int lmv_set_info_async(const struct lu_env *env, struct obd_export *exp,
                        if (tgt == NULL || tgt->ltd_exp == NULL)
                                continue;
 
-                        err = obd_set_info_async(env, tgt->ltd_exp,
-                                                 keylen, key, vallen, val, set);
-                        if (err && rc == 0)
-                                rc = err;
-                }
+                       err = obd_set_info_async(env, tgt->ltd_exp,
+                                                keylen, key, vallen, val, set);
+                       if (err && rc == 0)
+                               rc = err;
+               }
 
-                RETURN(rc);
-        }
+               RETURN(rc);
+       }
 
-        RETURN(-EINVAL);
+       RETURN(-EINVAL);
 }
 
 static int lmv_pack_md_v1(const struct lmv_stripe_md *lsm,