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LU-6401 headers: Create a header for obdo related functions
[fs/lustre-release.git] / lustre / target / out_lib.c
index 2a2b2b5..1b89ff6 100644 (file)
@@ -20,7 +20,7 @@
  * GPL HEADER END
  */
 /*
- * Copyright (c) 2014, Intel Corporation.
+ * Copyright (c) 2014, 2015, Intel Corporation.
  */
 /*
  * lustre/target/out_lib.c
 #define DEBUG_SUBSYSTEM S_CLASS
 
 #include <lu_target.h>
+#include <lustre_obdo.h>
 #include <lustre_update.h>
+#include <md_object.h>
 #include <obd.h>
 #include <obd_class.h>
 
-#define OUT_UPDATE_BUFFER_SIZE_ADD     4096
-#define OUT_UPDATE_BUFFER_SIZE_MAX     (256 * 4096)  /* 1MB update size now */
+#include "tgt_internal.h"
 
 const char *update_op_str(__u16 opc)
 {
@@ -57,6 +58,8 @@ const char *update_op_str(__u16 opc)
                [OUT_WRITE] = "write",
                [OUT_XATTR_DEL] = "xattr_del",
                [OUT_PUNCH] = "punch",
+               [OUT_READ] = "read",
+               [OUT_NOOP] = "noop",
        };
 
        if (opc < ARRAY_SIZE(opc_str) && opc_str[opc] != NULL)
@@ -74,40 +77,50 @@ EXPORT_SYMBOL(update_op_str);
  *
  * \params[in] env             execution environment
  * \params[in] update          object update to be filled
- * \params[in] max_update_size maximum object update size, if the current
- *                              update length equals or exceeds the size, it
- *                              will return -E2BIG.
+ * \params[in,out] max_update_size     maximum object update size, if the
+ *                                      current update length equals or
+ *                                      exceeds the size, it will return -E2BIG.
  * \params[in] update_op       update type
  * \params[in] fid             object FID of the update
- * \params[in] params_count    the count of the update parameters
- * \params[in] params_sizes    the length of each parameters
+ * \params[in] param_count     the count of the update parameters
+ * \params[in] param_sizes     the length of each parameters
  *
  * \retval                     0 if packing succeeds.
  * \retval                     -E2BIG if packing exceeds the maximum length.
  */
 int out_update_header_pack(const struct lu_env *env,
-                          struct object_update *update, size_t max_update_size,
-                          enum update_type update_op, const struct lu_fid *fid,
-                          unsigned int param_count, __u16 *params_sizes)
+                          struct object_update *update,
+                          size_t *max_update_size,
+                          enum update_type update_op,
+                          const struct lu_fid *fid,
+                          unsigned int param_count,
+                          __u16 *param_sizes,
+                          __u32 reply_size)
 {
        struct object_update_param      *param;
        unsigned int                    i;
        size_t                          update_size;
 
+       if (((reply_size + 7) >> 3) >= 1ULL << 16)
+               return -EINVAL;
+
        /* Check whether the packing exceeding the maxima update length */
        update_size = sizeof(*update);
        for (i = 0; i < param_count; i++)
-               update_size += cfs_size_round(sizeof(*param) + params_sizes[i]);
+               update_size += cfs_size_round(sizeof(*param) + param_sizes[i]);
 
-       if (unlikely(update_size >= max_update_size))
+       if (unlikely(update_size >= *max_update_size)) {
+               *max_update_size = update_size;
                return -E2BIG;
+       }
 
        update->ou_fid = *fid;
        update->ou_type = update_op;
        update->ou_params_count = param_count;
+       update->ou_result_size = reply_size;
        param = &update->ou_params[0];
        for (i = 0; i < param_count; i++) {
-               param->oup_len = params_sizes[i];
+               param->oup_len = param_sizes[i];
                param = (struct object_update_param *)((char *)param +
                         object_update_param_size(param));
        }
@@ -131,9 +144,10 @@ int out_update_header_pack(const struct lu_env *env,
  * \retval             negative errno if updates packing fails
  **/
 int out_update_pack(const struct lu_env *env, struct object_update *update,
-                   size_t max_update_size, enum update_type op,
+                   size_t *max_update_size, enum update_type op,
                    const struct lu_fid *fid, unsigned int param_count,
-                   __u16 *param_sizes, const void **param_bufs)
+                   __u16 *param_sizes, const void **param_bufs,
+                   __u32 reply_size)
 {
        struct object_update_param      *param;
        unsigned int                    i;
@@ -141,7 +155,7 @@ int out_update_pack(const struct lu_env *env, struct object_update *update,
        ENTRY;
 
        rc = out_update_header_pack(env, update, max_update_size, op, fid,
-                                   param_count, param_sizes);
+                                   param_count, param_sizes, reply_size);
        if (rc != 0)
                RETURN(rc);
 
@@ -172,7 +186,7 @@ EXPORT_SYMBOL(out_update_pack);
  * \retval             negative errno if insertion fails.
  */
 int out_create_pack(const struct lu_env *env, struct object_update *update,
-                   size_t max_update_size, const struct lu_fid *fid,
+                   size_t *max_update_size, const struct lu_fid *fid,
                    const struct lu_attr *attr, struct dt_allocation_hint *hint,
                    struct dt_object_format *dof)
 {
@@ -190,12 +204,14 @@ int out_create_pack(const struct lu_env *env, struct object_update *update,
        }
 
        rc = out_update_header_pack(env, update, max_update_size, OUT_CREATE,
-                                   fid, buf_count, sizes);
+                                   fid, buf_count, sizes, 0);
        if (rc != 0)
                RETURN(rc);
 
        obdo = object_update_param_get(update, 0, NULL);
-       LASSERT(obdo != NULL);
+       if (IS_ERR(obdo))
+               RETURN(PTR_ERR(obdo));
+
        obdo->o_valid = 0;
        obdo_from_la(obdo, attr, attr->la_valid);
        lustre_set_wire_obdo(NULL, obdo, obdo);
@@ -204,7 +220,9 @@ int out_create_pack(const struct lu_env *env, struct object_update *update,
                struct lu_fid *tmp;
 
                tmp = object_update_param_get(update, 1, NULL);
-               LASSERT(tmp != NULL);
+               if (IS_ERR(tmp))
+                       RETURN(PTR_ERR(tmp));
+
                fid_cpu_to_le(tmp, parent_fid);
        }
 
@@ -213,23 +231,23 @@ int out_create_pack(const struct lu_env *env, struct object_update *update,
 EXPORT_SYMBOL(out_create_pack);
 
 int out_ref_del_pack(const struct lu_env *env, struct object_update *update,
-                    size_t max_update_size, const struct lu_fid *fid)
+                    size_t *max_update_size, const struct lu_fid *fid)
 {
        return out_update_pack(env, update, max_update_size, OUT_REF_DEL, fid,
-                              0, NULL, NULL);
+                              0, NULL, NULL, 0);
 }
 EXPORT_SYMBOL(out_ref_del_pack);
 
 int out_ref_add_pack(const struct lu_env *env, struct object_update *update,
-                    size_t max_update_size, const struct lu_fid *fid)
+                    size_t *max_update_size, const struct lu_fid *fid)
 {
        return out_update_pack(env, update, max_update_size, OUT_REF_ADD, fid,
-                              0, NULL, NULL);
+                              0, NULL, NULL, 0);
 }
 EXPORT_SYMBOL(out_ref_add_pack);
 
 int out_attr_set_pack(const struct lu_env *env, struct object_update *update,
-                     size_t max_update_size, const struct lu_fid *fid,
+                     size_t *max_update_size, const struct lu_fid *fid,
                      const struct lu_attr *attr)
 {
        struct obdo             *obdo;
@@ -238,12 +256,14 @@ int out_attr_set_pack(const struct lu_env *env, struct object_update *update,
        ENTRY;
 
        rc = out_update_header_pack(env, update, max_update_size,
-                                   OUT_ATTR_SET, fid, 1, &size);
+                                   OUT_ATTR_SET, fid, 1, &size, 0);
        if (rc != 0)
                RETURN(rc);
 
        obdo = object_update_param_get(update, 0, NULL);
-       LASSERT(obdo != NULL);
+       if (IS_ERR(obdo))
+               RETURN(PTR_ERR(obdo));
+
        obdo->o_valid = 0;
        obdo_from_la(obdo, attr, attr->la_valid);
        lustre_set_wire_obdo(NULL, obdo, obdo);
@@ -253,7 +273,7 @@ int out_attr_set_pack(const struct lu_env *env, struct object_update *update,
 EXPORT_SYMBOL(out_attr_set_pack);
 
 int out_xattr_set_pack(const struct lu_env *env, struct object_update *update,
-                      size_t max_update_size, const struct lu_fid *fid,
+                      size_t *max_update_size, const struct lu_fid *fid,
                       const struct lu_buf *buf, const char *name, __u32 flag)
 {
        __u16   sizes[3] = {strlen(name) + 1, buf->lb_len, sizeof(flag)};
@@ -261,25 +281,24 @@ int out_xattr_set_pack(const struct lu_env *env, struct object_update *update,
                               (char *)&flag};
 
        return out_update_pack(env, update, max_update_size, OUT_XATTR_SET,
-                              fid, ARRAY_SIZE(sizes), sizes, bufs);
+                              fid, ARRAY_SIZE(sizes), sizes, bufs, 0);
 }
 EXPORT_SYMBOL(out_xattr_set_pack);
 
 int out_xattr_del_pack(const struct lu_env *env, struct object_update *update,
-                      size_t max_update_size, const struct lu_fid *fid,
+                      size_t *max_update_size, const struct lu_fid *fid,
                       const char *name)
 {
        __u16   size = strlen(name) + 1;
 
        return out_update_pack(env, update, max_update_size, OUT_XATTR_DEL,
-                              fid, 1, &size, (const void **)&name);
+                              fid, 1, &size, (const void **)&name, 0);
 }
 EXPORT_SYMBOL(out_xattr_del_pack);
 
-
 int out_index_insert_pack(const struct lu_env *env,
                          struct object_update *update,
-                         size_t max_update_size, const struct lu_fid *fid,
+                         size_t *max_update_size, const struct lu_fid *fid,
                          const struct dt_rec *rec, const struct dt_key *key)
 {
        struct dt_insert_rec       *rec1 = (struct dt_insert_rec *)rec;
@@ -295,34 +314,34 @@ int out_index_insert_pack(const struct lu_env *env,
        fid_cpu_to_le(&rec_fid, rec1->rec_fid);
 
        return out_update_pack(env, update, max_update_size, OUT_INDEX_INSERT,
-                              fid, ARRAY_SIZE(sizes), sizes, bufs);
+                              fid, ARRAY_SIZE(sizes), sizes, bufs, 0);
 }
 EXPORT_SYMBOL(out_index_insert_pack);
 
 int out_index_delete_pack(const struct lu_env *env,
                          struct object_update *update,
-                         size_t max_update_size, const struct lu_fid *fid,
+                         size_t *max_update_size, const struct lu_fid *fid,
                          const struct dt_key *key)
 {
        __u16   size = strlen((char *)key) + 1;
        const void *buf = key;
 
        return out_update_pack(env, update, max_update_size, OUT_INDEX_DELETE,
-                              fid, 1, &size, &buf);
+                              fid, 1, &size, &buf, 0);
 }
 EXPORT_SYMBOL(out_index_delete_pack);
 
 int out_object_destroy_pack(const struct lu_env *env,
                            struct object_update *update,
-                           size_t max_update_size, const struct lu_fid *fid)
+                           size_t *max_update_size, const struct lu_fid *fid)
 {
        return out_update_pack(env, update, max_update_size, OUT_DESTROY, fid,
-                              0, NULL, NULL);
+                              0, NULL, NULL, 0);
 }
 EXPORT_SYMBOL(out_object_destroy_pack);
 
 int out_write_pack(const struct lu_env *env, struct object_update *update,
-                  size_t max_update_size, const struct lu_fid *fid,
+                  size_t *max_update_size, const struct lu_fid *fid,
                   const struct lu_buf *buf, __u64 pos)
 {
        __u16           sizes[2] = {buf->lb_len, sizeof(pos)};
@@ -332,7 +351,7 @@ int out_write_pack(const struct lu_env *env, struct object_update *update,
        pos = cpu_to_le64(pos);
 
        rc = out_update_pack(env, update, max_update_size, OUT_WRITE, fid,
-                            ARRAY_SIZE(sizes), sizes, bufs);
+                            ARRAY_SIZE(sizes), sizes, bufs, 0);
        return rc;
 }
 EXPORT_SYMBOL(out_write_pack);
@@ -353,28 +372,29 @@ EXPORT_SYMBOL(out_write_pack);
  **/
 int out_index_lookup_pack(const struct lu_env *env,
                          struct object_update *update,
-                         size_t max_update_size, const struct lu_fid *fid,
+                         size_t *max_update_size, const struct lu_fid *fid,
                          struct dt_rec *rec, const struct dt_key *key)
 {
        const void      *name = key;
        __u16           size = strlen((char *)name) + 1;
 
+       /* XXX: this shouldn't be hardcoded */
        return out_update_pack(env, update, max_update_size, OUT_INDEX_LOOKUP,
-                              fid, 1, &size, &name);
+                              fid, 1, &size, &name, 256);
 }
 EXPORT_SYMBOL(out_index_lookup_pack);
 
 int out_attr_get_pack(const struct lu_env *env, struct object_update *update,
-                     size_t max_update_size, const struct lu_fid *fid)
+                     size_t *max_update_size, const struct lu_fid *fid)
 {
        return out_update_pack(env, update, max_update_size, OUT_ATTR_GET,
-                              fid, 0, NULL, NULL);
+                              fid, 0, NULL, NULL, sizeof(struct obdo));
 }
 EXPORT_SYMBOL(out_attr_get_pack);
 
 int out_xattr_get_pack(const struct lu_env *env, struct object_update *update,
-                      size_t max_update_size, const struct lu_fid *fid,
-                      const char *name)
+                      size_t *max_update_size, const struct lu_fid *fid,
+                      const char *name, const int bufsize)
 {
        __u16 size;
 
@@ -382,6 +402,822 @@ int out_xattr_get_pack(const struct lu_env *env, struct object_update *update,
        size = strlen(name) + 1;
 
        return out_update_pack(env, update, max_update_size, OUT_XATTR_GET,
-                              fid, 1, &size, (const void **)&name);
+                              fid, 1, &size, (const void **)&name, bufsize);
 }
 EXPORT_SYMBOL(out_xattr_get_pack);
+
+int out_read_pack(const struct lu_env *env, struct object_update *update,
+                 size_t *max_update_size, const struct lu_fid *fid,
+                 size_t size, loff_t pos)
+{
+       __u16           sizes[2] = {sizeof(size), sizeof(pos)};
+       const void      *bufs[2] = {&size, &pos};
+
+       LASSERT(size > 0);
+       size = cpu_to_le64(size);
+       pos = cpu_to_le64(pos);
+
+       return out_update_pack(env, update, max_update_size, OUT_READ, fid,
+                              ARRAY_SIZE(sizes), sizes, bufs, size);
+}
+EXPORT_SYMBOL(out_read_pack);
+
+static int tx_extend_args(struct thandle_exec_args *ta, int new_alloc_ta)
+{
+       struct tx_arg   **new_ta;
+       int             i;
+       int             rc = 0;
+
+       if (ta->ta_alloc_args >= new_alloc_ta)
+               return 0;
+
+       OBD_ALLOC(new_ta, sizeof(*new_ta) * new_alloc_ta);
+       if (new_ta == NULL)
+               return -ENOMEM;
+
+       for (i = 0; i < new_alloc_ta; i++) {
+               if (i < ta->ta_alloc_args) {
+                       /* copy the old args to new one */
+                       new_ta[i] = ta->ta_args[i];
+               } else {
+                       OBD_ALLOC_PTR(new_ta[i]);
+                       if (new_ta[i] == NULL)
+                               GOTO(out, rc = -ENOMEM);
+               }
+       }
+
+       /* free the old args */
+       if (ta->ta_args != NULL)
+               OBD_FREE(ta->ta_args, sizeof(ta->ta_args[0]) *
+                                     ta->ta_alloc_args);
+
+       ta->ta_args = new_ta;
+       ta->ta_alloc_args = new_alloc_ta;
+out:
+       if (rc != 0) {
+               for (i = 0; i < new_alloc_ta; i++) {
+                       if (new_ta[i] != NULL)
+                               OBD_FREE_PTR(new_ta[i]);
+               }
+               OBD_FREE(new_ta, sizeof(*new_ta) * new_alloc_ta);
+       }
+       return rc;
+}
+
+#define TX_ALLOC_STEP  8
+struct tx_arg *tx_add_exec(struct thandle_exec_args *ta,
+                          tx_exec_func_t func, tx_exec_func_t undo,
+                          const char *file, int line)
+{
+       int rc;
+       int i;
+
+       LASSERT(ta != NULL);
+       LASSERT(func != NULL);
+
+       if (ta->ta_argno + 1 >= ta->ta_alloc_args) {
+               rc = tx_extend_args(ta, ta->ta_alloc_args + TX_ALLOC_STEP);
+               if (rc != 0)
+                       return ERR_PTR(rc);
+       }
+
+       i = ta->ta_argno;
+
+       ta->ta_argno++;
+
+       ta->ta_args[i]->exec_fn = func;
+       ta->ta_args[i]->undo_fn = undo;
+       ta->ta_args[i]->file    = file;
+       ta->ta_args[i]->line    = line;
+
+       return ta->ta_args[i];
+}
+
+static int out_obj_destroy(const struct lu_env *env, struct dt_object *dt_obj,
+                          struct thandle *th)
+{
+       int rc;
+
+       CDEBUG(D_INFO, "%s: destroy "DFID"\n", dt_obd_name(th->th_dev),
+              PFID(lu_object_fid(&dt_obj->do_lu)));
+
+       dt_write_lock(env, dt_obj, MOR_TGT_CHILD);
+       rc = dt_destroy(env, dt_obj, th);
+       dt_write_unlock(env, dt_obj);
+
+       return rc;
+}
+
+/**
+ * All of the xxx_undo will be used once execution failed,
+ * But because all of the required resource has been reserved in
+ * declare phase, i.e. if declare succeed, it should make sure
+ * the following executing phase succeed in anyway, so these undo
+ * should be useless for most of the time in Phase I
+ */
+static int out_tx_create_undo(const struct lu_env *env, struct thandle *th,
+                             struct tx_arg *arg)
+{
+       int rc;
+
+       rc = out_obj_destroy(env, arg->object, th);
+       if (rc != 0)
+               CERROR("%s: undo failure, we are doomed!: rc = %d\n",
+                      dt_obd_name(th->th_dev), rc);
+       return rc;
+}
+
+int out_tx_create_exec(const struct lu_env *env, struct thandle *th,
+                      struct tx_arg *arg)
+{
+       struct dt_object        *dt_obj = arg->object;
+       int                      rc;
+
+       CDEBUG(D_OTHER, "%s: create "DFID": dof %u, mode %o\n",
+              dt_obd_name(th->th_dev),
+              PFID(lu_object_fid(&arg->object->do_lu)),
+              arg->u.create.dof.dof_type,
+              arg->u.create.attr.la_mode & S_IFMT);
+
+       dt_write_lock(env, dt_obj, MOR_TGT_CHILD);
+       rc = dt_create(env, dt_obj, &arg->u.create.attr,
+                      &arg->u.create.hint, &arg->u.create.dof, th);
+
+       dt_write_unlock(env, dt_obj);
+
+       CDEBUG(D_INFO, "%s: insert create reply %p index %d: rc = %d\n",
+              dt_obd_name(th->th_dev), arg->reply, arg->index, rc);
+
+       if (arg->reply != NULL)
+               object_update_result_insert(arg->reply, NULL, 0, arg->index,
+                                           rc);
+
+       return rc;
+}
+
+/**
+ * Add create update to thandle
+ *
+ * Declare create updates and add the update to the thandle updates
+ * exec array.
+ *
+ * \param [in] env     execution environment
+ * \param [in] obj     object to be created
+ * \param [in] attr    attributes of the creation
+ * \param [in] parent_fid the fid of the parent
+ * \param [in] dof     dt object format of the creation
+ * \param [in] ta      thandle execuation args where all of updates
+ *                      of the transaction are stored
+ * \param [in] th      thandle for this update
+ * \param [in] reply   reply of the updates
+ * \param [in] index   index of the reply
+ * \param [in] file    the file name where the function is called,
+ *                      which is only for debugging purpose.
+ * \param [in] line    the line number where the funtion is called,
+ *                      which is only for debugging purpose.
+ *
+ * \retval             0 if updates is added successfully.
+ * \retval             negative errno if update adding fails.
+ */
+int out_create_add_exec(const struct lu_env *env, struct dt_object *obj,
+                       struct lu_attr *attr, struct lu_fid *parent_fid,
+                       struct dt_object_format *dof,
+                       struct thandle_exec_args *ta,
+                       struct thandle  *th,
+                       struct object_update_reply *reply,
+                       int index, const char *file, int line)
+{
+       struct tx_arg *arg;
+       int rc;
+
+       rc = dt_declare_create(env, obj, attr, NULL, dof, th);
+       if (rc != 0)
+               return rc;
+
+       arg = tx_add_exec(ta, out_tx_create_exec, out_tx_create_undo, file,
+                         line);
+       if (IS_ERR(arg))
+               return PTR_ERR(arg);
+
+       /* release the object in out_trans_stop */
+       lu_object_get(&obj->do_lu);
+       arg->object = obj;
+       arg->u.create.attr = *attr;
+       if (parent_fid != NULL)
+               arg->u.create.fid = *parent_fid;
+       memset(&arg->u.create.hint, 0, sizeof(arg->u.create.hint));
+       arg->u.create.dof  = *dof;
+       arg->reply = reply;
+       arg->index = index;
+
+       return 0;
+}
+
+static int out_tx_attr_set_undo(const struct lu_env *env,
+                               struct thandle *th, struct tx_arg *arg)
+{
+       CERROR("%s: attr set undo "DFID" unimplemented yet!: rc = %d\n",
+              dt_obd_name(th->th_dev),
+              PFID(lu_object_fid(&arg->object->do_lu)), -ENOTSUPP);
+
+       return -ENOTSUPP;
+}
+
+static int out_tx_attr_set_exec(const struct lu_env *env, struct thandle *th,
+                               struct tx_arg *arg)
+{
+       struct dt_object        *dt_obj = arg->object;
+       int                     rc;
+
+       CDEBUG(D_OTHER, "%s: attr set "DFID"\n", dt_obd_name(th->th_dev),
+              PFID(lu_object_fid(&dt_obj->do_lu)));
+
+       dt_write_lock(env, dt_obj, MOR_TGT_CHILD);
+       rc = dt_attr_set(env, dt_obj, &arg->u.attr_set.attr, th);
+       dt_write_unlock(env, dt_obj);
+
+       CDEBUG(D_INFO, "%s: insert attr_set reply %p index %d: rc = %d\n",
+              dt_obd_name(th->th_dev), arg->reply, arg->index, rc);
+
+       if (arg->reply != NULL)
+               object_update_result_insert(arg->reply, NULL, 0,
+                                           arg->index, rc);
+
+       return rc;
+}
+
+int out_attr_set_add_exec(const struct lu_env *env, struct dt_object *dt_obj,
+                         const struct lu_attr *attr,
+                         struct thandle_exec_args *ta,
+                         struct thandle *th, struct object_update_reply *reply,
+                         int index, const char *file, int line)
+{
+       struct tx_arg   *arg;
+       int             rc;
+
+       rc = dt_declare_attr_set(env, dt_obj, attr, th);
+       if (rc != 0)
+               return rc;
+
+       arg = tx_add_exec(ta, out_tx_attr_set_exec, out_tx_attr_set_undo,
+                         file, line);
+       if (IS_ERR(arg))
+               return PTR_ERR(arg);
+
+       lu_object_get(&dt_obj->do_lu);
+       arg->object = dt_obj;
+       arg->u.attr_set.attr = *attr;
+       arg->reply = reply;
+       arg->index = index;
+       return 0;
+}
+
+static int out_tx_write_exec(const struct lu_env *env, struct thandle *th,
+                            struct tx_arg *arg)
+{
+       struct dt_object *dt_obj = arg->object;
+       int rc;
+
+       CDEBUG(D_INFO, "write "DFID" pos "LPU64" buf %p, len %lu\n",
+              PFID(lu_object_fid(&dt_obj->do_lu)), arg->u.write.pos,
+              arg->u.write.buf.lb_buf, (unsigned long)arg->u.write.buf.lb_len);
+
+       if (OBD_FAIL_CHECK(OBD_FAIL_OUT_ENOSPC)) {
+               rc = -ENOSPC;
+       } else {
+               dt_write_lock(env, dt_obj, MOR_TGT_CHILD);
+               rc = dt_record_write(env, dt_obj, &arg->u.write.buf,
+                                    &arg->u.write.pos, th);
+               dt_write_unlock(env, dt_obj);
+
+               if (rc == 0)
+                       rc = arg->u.write.buf.lb_len;
+       }
+
+       if (arg->reply != NULL)
+               object_update_result_insert(arg->reply, NULL, 0, arg->index,
+                                           rc);
+
+       return rc > 0 ? 0 : rc;
+}
+
+int out_write_add_exec(const struct lu_env *env, struct dt_object *dt_obj,
+                      const struct lu_buf *buf, loff_t pos,
+                      struct thandle_exec_args *ta, struct thandle *th,
+                      struct object_update_reply *reply, int index,
+                      const char *file, int line)
+{
+       struct tx_arg   *arg;
+       int             rc;
+
+       rc = dt_declare_record_write(env, dt_obj, buf, pos, th);
+       if (rc != 0)
+               return rc;
+
+       arg = tx_add_exec(ta, out_tx_write_exec, NULL, file, line);
+       if (IS_ERR(arg))
+               return PTR_ERR(arg);
+
+       lu_object_get(&dt_obj->do_lu);
+       arg->object = dt_obj;
+       arg->u.write.buf = *buf;
+       arg->u.write.pos = pos;
+       arg->reply = reply;
+       arg->index = index;
+       return 0;
+}
+
+static int out_tx_xattr_set_exec(const struct lu_env *env,
+                                struct thandle *th,
+                                struct tx_arg *arg)
+{
+       struct dt_object *dt_obj = arg->object;
+       int rc;
+
+       CDEBUG(D_INFO, "%s: set xattr buf %p name %s flag %d\n",
+              dt_obd_name(th->th_dev), arg->u.xattr_set.buf.lb_buf,
+              arg->u.xattr_set.name, arg->u.xattr_set.flags);
+
+       if (!lu_object_exists(&dt_obj->do_lu))
+               GOTO(out, rc = -ENOENT);
+
+       dt_write_lock(env, dt_obj, MOR_TGT_CHILD);
+       rc = dt_xattr_set(env, dt_obj, &arg->u.xattr_set.buf,
+                         arg->u.xattr_set.name, arg->u.xattr_set.flags,
+                         th);
+       /**
+        * Ignore errors if this is LINK EA
+        **/
+       if (unlikely(rc != 0 &&
+                    strcmp(arg->u.xattr_set.name, XATTR_NAME_LINK) == 0)) {
+               /* XXX: If the linkEA is overflow, then we need to notify the
+                *      namespace LFSCK to skip "nlink" attribute verification
+                *      on this object to avoid the "nlink" to be shrinked by
+                *      wrong. It may be not good an interaction with LFSCK
+                *      like this. We will consider to replace it with other
+                *      mechanism in future. LU-5802. */
+               if (rc == -ENOSPC && arg->reply != NULL) {
+                       struct lfsck_request *lr = &tgt_th_info(env)->tti_lr;
+
+                       lfsck_pack_rfa(lr, lu_object_fid(&dt_obj->do_lu),
+                                      LE_SKIP_NLINK, LFSCK_TYPE_NAMESPACE);
+                       tgt_lfsck_in_notify(env,
+                               tgt_ses_info(env)->tsi_tgt->lut_bottom, lr, th);
+               }
+
+               rc = 0;
+       }
+       dt_write_unlock(env, dt_obj);
+
+out:
+       CDEBUG(D_INFO, "%s: insert xattr set reply %p index %d: rc = %d\n",
+              dt_obd_name(th->th_dev), arg->reply, arg->index, rc);
+
+       if (arg->reply != NULL)
+               object_update_result_insert(arg->reply, NULL, 0, arg->index,
+                                           rc);
+
+       return rc;
+}
+
+int out_xattr_set_add_exec(const struct lu_env *env, struct dt_object *dt_obj,
+                          const struct lu_buf *buf, const char *name,
+                          int flags, struct thandle_exec_args *ta,
+                          struct thandle *th,
+                          struct object_update_reply *reply,
+                          int index, const char *file, int line)
+{
+       struct tx_arg   *arg;
+       int             rc;
+
+       rc = dt_declare_xattr_set(env, dt_obj, buf, name, flags, th);
+       if (rc != 0)
+               return rc;
+
+       if (strcmp(name, XATTR_NAME_LINK) == 0 && reply != NULL) {
+               struct lfsck_request *lr = &tgt_th_info(env)->tti_lr;
+
+               /* XXX: If the linkEA is overflow, then we need to notify the
+                *      namespace LFSCK to skip "nlink" attribute verification
+                *      on this object to avoid the "nlink" to be shrinked by
+                *      wrong. It may be not good an interaction with LFSCK
+                *      like this. We will consider to replace it with other
+                *      mechanism in future. LU-5802. */
+               lfsck_pack_rfa(lr, lu_object_fid(&dt_obj->do_lu),
+                              LE_SKIP_NLINK_DECLARE, LFSCK_TYPE_NAMESPACE);
+               rc = tgt_lfsck_in_notify(env,
+                                        tgt_ses_info(env)->tsi_tgt->lut_bottom,
+                                        lr, ta->ta_handle);
+               if (rc != 0)
+                       return rc;
+       }
+
+       arg = tx_add_exec(ta, out_tx_xattr_set_exec, NULL, file, line);
+       if (IS_ERR(arg))
+               return PTR_ERR(arg);
+
+       lu_object_get(&dt_obj->do_lu);
+       arg->object = dt_obj;
+       arg->u.xattr_set.name = name;
+       arg->u.xattr_set.flags = flags;
+       arg->u.xattr_set.buf = *buf;
+       arg->reply = reply;
+       arg->index = index;
+       arg->u.xattr_set.csum = 0;
+       return 0;
+}
+
+static int out_tx_xattr_del_exec(const struct lu_env *env, struct thandle *th,
+                                struct tx_arg *arg)
+{
+       struct dt_object *dt_obj = arg->object;
+       int rc;
+
+       CDEBUG(D_INFO, "%s: del xattr name '%s' on "DFID"\n",
+              dt_obd_name(th->th_dev), arg->u.xattr_set.name,
+              PFID(lu_object_fid(&dt_obj->do_lu)));
+
+       if (!lu_object_exists(&dt_obj->do_lu))
+               GOTO(out, rc = -ENOENT);
+
+       dt_write_lock(env, dt_obj, MOR_TGT_CHILD);
+       rc = dt_xattr_del(env, dt_obj, arg->u.xattr_set.name,
+                         th);
+       dt_write_unlock(env, dt_obj);
+out:
+       CDEBUG(D_INFO, "%s: insert xattr del reply %p index %d: rc = %d\n",
+              dt_obd_name(th->th_dev), arg->reply, arg->index, rc);
+
+       if (arg->reply != NULL)
+               object_update_result_insert(arg->reply, NULL, 0, arg->index,
+                                           rc);
+
+       return rc;
+}
+
+int out_xattr_del_add_exec(const struct lu_env *env, struct dt_object *dt_obj,
+                          const char *name, struct thandle_exec_args *ta,
+                          struct thandle *th,
+                          struct object_update_reply *reply, int index,
+                          const char *file, int line)
+{
+       struct tx_arg   *arg;
+       int             rc;
+
+       rc = dt_declare_xattr_del(env, dt_obj, name, th);
+       if (rc != 0)
+               return rc;
+
+       arg = tx_add_exec(ta, out_tx_xattr_del_exec, NULL, file, line);
+       if (IS_ERR(arg))
+               return PTR_ERR(arg);
+
+       lu_object_get(&dt_obj->do_lu);
+       arg->object = dt_obj;
+       arg->u.xattr_set.name = name;
+       arg->reply = reply;
+       arg->index = index;
+       return 0;
+}
+
+static int out_obj_ref_add(const struct lu_env *env,
+                          struct dt_object *dt_obj,
+                          struct thandle *th)
+{
+       int rc;
+
+       dt_write_lock(env, dt_obj, MOR_TGT_CHILD);
+       rc = dt_ref_add(env, dt_obj, th);
+       dt_write_unlock(env, dt_obj);
+
+       return rc;
+}
+
+static int out_obj_ref_del(const struct lu_env *env,
+                          struct dt_object *dt_obj,
+                          struct thandle *th)
+{
+       int rc;
+
+       dt_write_lock(env, dt_obj, MOR_TGT_CHILD);
+       rc = dt_ref_del(env, dt_obj, th);
+       dt_write_unlock(env, dt_obj);
+
+       return rc;
+}
+
+static int out_tx_ref_add_exec(const struct lu_env *env, struct thandle *th,
+                              struct tx_arg *arg)
+{
+       struct dt_object *dt_obj = arg->object;
+       int rc;
+
+       rc = out_obj_ref_add(env, dt_obj, th);
+
+       CDEBUG(D_INFO, "%s: insert ref_add reply %p index %d: rc = %d\n",
+              dt_obd_name(th->th_dev), arg->reply, arg->index, rc);
+
+       if (arg->reply != NULL)
+               object_update_result_insert(arg->reply, NULL, 0, arg->index,
+                                           rc);
+       return rc;
+}
+
+static int out_tx_ref_add_undo(const struct lu_env *env, struct thandle *th,
+                              struct tx_arg *arg)
+{
+       return out_obj_ref_del(env, arg->object, th);
+}
+
+int out_ref_add_add_exec(const struct lu_env *env, struct dt_object *dt_obj,
+                        struct thandle_exec_args *ta,
+                        struct thandle *th,
+                        struct object_update_reply *reply, int index,
+                        const char *file, int line)
+{
+       struct tx_arg   *arg;
+       int             rc;
+
+       rc = dt_declare_ref_add(env, dt_obj, th);
+       if (rc != 0)
+               return rc;
+
+       arg = tx_add_exec(ta, out_tx_ref_add_exec, out_tx_ref_add_undo, file,
+                         line);
+       if (IS_ERR(arg))
+               return PTR_ERR(arg);
+
+       lu_object_get(&dt_obj->do_lu);
+       arg->object = dt_obj;
+       arg->reply = reply;
+       arg->index = index;
+       return 0;
+}
+
+static int out_tx_ref_del_exec(const struct lu_env *env, struct thandle *th,
+                              struct tx_arg *arg)
+{
+       struct dt_object        *dt_obj = arg->object;
+       int                      rc;
+
+       rc = out_obj_ref_del(env, dt_obj, th);
+
+       CDEBUG(D_INFO, "%s: insert ref_del reply %p index %d: rc = %d\n",
+              dt_obd_name(th->th_dev), arg->reply, arg->index, 0);
+
+       if (arg->reply != NULL)
+               object_update_result_insert(arg->reply, NULL, 0, arg->index,
+                                           rc);
+
+       return rc;
+}
+
+static int out_tx_ref_del_undo(const struct lu_env *env, struct thandle *th,
+                              struct tx_arg *arg)
+{
+       return out_obj_ref_add(env, arg->object, th);
+}
+
+int out_ref_del_add_exec(const struct lu_env *env, struct dt_object *dt_obj,
+                        struct thandle_exec_args *ta,
+                        struct thandle *th,
+                        struct object_update_reply *reply, int index,
+                        const char *file, int line)
+{
+       struct tx_arg   *arg;
+       int             rc;
+
+       rc = dt_declare_ref_del(env, dt_obj, th);
+       if (rc != 0)
+               return rc;
+
+       arg = tx_add_exec(ta, out_tx_ref_del_exec, out_tx_ref_del_undo, file,
+                         line);
+       if (IS_ERR(arg))
+               return PTR_ERR(arg);
+
+       lu_object_get(&dt_obj->do_lu);
+       arg->object = dt_obj;
+       arg->reply = reply;
+       arg->index = index;
+       return 0;
+}
+
+static int out_obj_index_insert(const struct lu_env *env,
+                               struct dt_object *dt_obj,
+                               const struct dt_rec *rec,
+                               const struct dt_key *key,
+                               struct thandle *th)
+{
+       int rc;
+
+       CDEBUG(D_INFO, "%s: index insert "DFID" name: %s fid "DFID", type %u\n",
+              dt_obd_name(th->th_dev), PFID(lu_object_fid(&dt_obj->do_lu)),
+              (char *)key, PFID(((struct dt_insert_rec *)rec)->rec_fid),
+              ((struct dt_insert_rec *)rec)->rec_type);
+
+       if (dt_try_as_dir(env, dt_obj) == 0)
+               return -ENOTDIR;
+
+       dt_write_lock(env, dt_obj, MOR_TGT_CHILD);
+       rc = dt_insert(env, dt_obj, rec, key, th, 0);
+       dt_write_unlock(env, dt_obj);
+
+       return rc;
+}
+
+static int out_obj_index_delete(const struct lu_env *env,
+                               struct dt_object *dt_obj,
+                               const struct dt_key *key,
+                               struct thandle *th)
+{
+       int rc;
+
+       CDEBUG(D_INFO, "%s: index delete "DFID" name: %s\n",
+              dt_obd_name(th->th_dev), PFID(lu_object_fid(&dt_obj->do_lu)),
+              (char *)key);
+
+       if (dt_try_as_dir(env, dt_obj) == 0)
+               return -ENOTDIR;
+
+       dt_write_lock(env, dt_obj, MOR_TGT_CHILD);
+       rc = dt_delete(env, dt_obj, key, th);
+       dt_write_unlock(env, dt_obj);
+
+       return rc;
+}
+
+static int out_tx_index_insert_exec(const struct lu_env *env,
+                                   struct thandle *th, struct tx_arg *arg)
+{
+       struct dt_object *dt_obj = arg->object;
+       int rc;
+
+       if (unlikely(!dt_object_exists(dt_obj)))
+               RETURN(-ESTALE);
+
+       rc = out_obj_index_insert(env, dt_obj,
+                                 (const struct dt_rec *)&arg->u.insert.rec,
+                                 arg->u.insert.key, th);
+
+       CDEBUG(D_INFO, "%s: insert idx insert reply %p index %d: rc = %d\n",
+              dt_obd_name(th->th_dev), arg->reply, arg->index, rc);
+
+       if (arg->reply != NULL)
+               object_update_result_insert(arg->reply, NULL, 0, arg->index,
+                                           rc);
+       return rc;
+}
+
+static int out_tx_index_insert_undo(const struct lu_env *env,
+                                   struct thandle *th, struct tx_arg *arg)
+{
+       return out_obj_index_delete(env, arg->object, arg->u.insert.key, th);
+}
+
+int out_index_insert_add_exec(const struct lu_env *env,
+                             struct dt_object *dt_obj,
+                             const struct dt_rec *rec,
+                             const struct dt_key *key,
+                             struct thandle_exec_args *ta,
+                             struct thandle *th,
+                             struct object_update_reply *reply,
+                             int index, const char *file, int line)
+{
+       struct tx_arg   *arg;
+       int             rc;
+
+       if (dt_try_as_dir(env, dt_obj) == 0) {
+               rc = -ENOTDIR;
+               return rc;
+       }
+
+       rc = dt_declare_insert(env, dt_obj, rec, key, th);
+       if (rc != 0)
+               return rc;
+
+       arg = tx_add_exec(ta, out_tx_index_insert_exec,
+                         out_tx_index_insert_undo, file, line);
+       if (IS_ERR(arg))
+               return PTR_ERR(arg);
+
+       lu_object_get(&dt_obj->do_lu);
+       arg->object = dt_obj;
+       arg->reply = reply;
+       arg->index = index;
+       arg->u.insert.rec = *(const struct dt_insert_rec *)rec;
+       arg->u.insert.key = key;
+
+       return 0;
+}
+
+static int out_tx_index_delete_exec(const struct lu_env *env,
+                                   struct thandle *th,
+                                   struct tx_arg *arg)
+{
+       int rc;
+
+       rc = out_obj_index_delete(env, arg->object, arg->u.insert.key, th);
+
+       CDEBUG(D_INFO, "%s: delete idx insert reply %p index %d: rc = %d\n",
+              dt_obd_name(th->th_dev), arg->reply, arg->index, rc);
+
+       if (arg->reply != NULL)
+               object_update_result_insert(arg->reply, NULL, 0, arg->index,
+                                           rc);
+
+       return rc;
+}
+
+static int out_tx_index_delete_undo(const struct lu_env *env,
+                                   struct thandle *th,
+                                   struct tx_arg *arg)
+{
+       CERROR("%s: Oops, can not rollback index_delete yet: rc = %d\n",
+              dt_obd_name(th->th_dev), -ENOTSUPP);
+       return -ENOTSUPP;
+}
+
+int out_index_delete_add_exec(const struct lu_env *env,
+                             struct dt_object *dt_obj,
+                             const struct dt_key *key,
+                             struct thandle_exec_args *ta,
+                             struct thandle *th,
+                             struct object_update_reply *reply,
+                             int index, const char *file, int line)
+{
+       struct tx_arg   *arg;
+       int             rc;
+
+       if (dt_try_as_dir(env, dt_obj) == 0) {
+               rc = -ENOTDIR;
+               return rc;
+       }
+
+       LASSERT(ta->ta_handle != NULL);
+       rc = dt_declare_delete(env, dt_obj, key, th);
+       if (rc != 0)
+               return rc;
+
+       arg = tx_add_exec(ta, out_tx_index_delete_exec,
+                         out_tx_index_delete_undo, file, line);
+       if (IS_ERR(arg))
+               return PTR_ERR(arg);
+
+       lu_object_get(&dt_obj->do_lu);
+       arg->object = dt_obj;
+       arg->reply = reply;
+       arg->index = index;
+       arg->u.insert.key = key;
+       return 0;
+}
+
+static int out_tx_destroy_exec(const struct lu_env *env, struct thandle *th,
+                              struct tx_arg *arg)
+{
+       struct dt_object *dt_obj = arg->object;
+       int rc;
+
+       rc = out_obj_destroy(env, dt_obj, th);
+
+       CDEBUG(D_INFO, "%s: insert destroy reply %p index %d: rc = %d\n",
+              dt_obd_name(th->th_dev), arg->reply, arg->index, rc);
+
+       if (arg->reply != NULL)
+               object_update_result_insert(arg->reply, NULL, 0, arg->index,
+                                           rc);
+
+       RETURN(rc);
+}
+
+static int out_tx_destroy_undo(const struct lu_env *env, struct thandle *th,
+                              struct tx_arg *arg)
+{
+       CERROR("%s: not support destroy undo yet!: rc = %d\n",
+              dt_obd_name(th->th_dev), -ENOTSUPP);
+       return -ENOTSUPP;
+}
+
+int out_destroy_add_exec(const struct lu_env *env, struct dt_object *dt_obj,
+                        struct thandle_exec_args *ta, struct thandle *th,
+                        struct object_update_reply *reply,
+                        int index, const char *file, int line)
+{
+       struct tx_arg   *arg;
+       int             rc;
+
+       rc = dt_declare_destroy(env, dt_obj, th);
+       if (rc != 0)
+               return rc;
+
+       arg = tx_add_exec(ta, out_tx_destroy_exec, out_tx_destroy_undo,
+                         file, line);
+       if (IS_ERR(arg))
+               return PTR_ERR(arg);
+
+       lu_object_get(&dt_obj->do_lu);
+       arg->object = dt_obj;
+       arg->reply = reply;
+       arg->index = index;
+       return 0;
+}