protocol: Added iatt conversion to older format

Added iatt conversion to an older format, when dealing with
older RPC versions. This enables iatt structure conformance
when dealing with older clients.

This helps fix rolling upgrade from 3.x versions to 4.0 version
of gluster by sending the right iatt in the dictionary when DHT
requests the same.

(cherry picked from commit b966c7790e35de353ae09ee48d4e2f55e0117f7e)

Change-Id: Ieaf925f81f8c7798a8fba1e90a59fa9dec82856c
BUG: 1551112
Signed-off-by: ShyamsundarR <srangana@redhat.com>

3 files changed, 94 insertions, 0 deletions

diff --git a/xlators/protocol/server/src/server-helpers.c b/xlators/protocol/server/src/server-helpers.c
index 31eb2510cf8..8d6a81fe1e2 100644
--- a/xlators/protocol/server/src/server-helpers.c
+++ b/xlators/protocol/server/src/server-helpers.c
@@ -1221,6 +1221,38 @@ getactivelkinfo_rsp_cleanup_v2 (gfx_getactivelk_rsp  *rsp)
 }
 
 int
+replace_old_iatt_in_dict (dict_t *xdata)
+{
+        int ret;
+        struct old_iatt *o_iatt; /* old iatt structure */
+        struct iatt *c_iatt; /* current iatt */
+        int32_t len = sizeof(struct old_iatt);
+
+        if (!xdata) {
+                return 0;
+        }
+
+        ret = dict_get_bin (xdata, DHT_IATT_IN_XDATA_KEY, (void **)&c_iatt);
+        if (ret < 0) {
+                return 0;
+        }
+
+        o_iatt = GF_CALLOC (1, len, gf_common_mt_char);
+        if (!o_iatt) {
+                return -1;
+        }
+
+        oldiatt_from_iatt (o_iatt, c_iatt);
+
+        ret = dict_set_bin (xdata, DHT_IATT_IN_XDATA_KEY, o_iatt, len);
+        if (ret) {
+                GF_FREE (o_iatt);
+        }
+
+        return ret;
+}
+
+int
 gf_server_check_getxattr_cmd (call_frame_t *frame, const char *key)
 {
 
@@ -2462,6 +2494,12 @@ server_populate_compound_response (xlator_t *this, gfs3_compound_rsp *rsp,
 
                 rsp_args = &this_rsp->compound_rsp_u.compound_unlink_rsp;
 
+                if (replace_old_iatt_in_dict (this_args_cbk->xdata)) {
+                        rsp_args->op_errno = errno;
+                        rsp_args->op_ret = -1;
+                        goto out;
+                }
+
                 GF_PROTOCOL_DICT_SERIALIZE (this, this_args_cbk->xdata,
                                             &rsp_args->xdata.xdata_val,
                                             rsp_args->xdata.xdata_len,
@@ -2724,6 +2762,12 @@ server_populate_compound_response (xlator_t *this, gfs3_compound_rsp *rsp,
 
                 rsp_args = &this_rsp->compound_rsp_u.compound_setxattr_rsp;
 
+                if (replace_old_iatt_in_dict (this_args_cbk->xdata)) {
+                        rsp_args->op_errno = errno;
+                        rsp_args->op_ret = -1;
+                        goto out;
+                }
+
                 GF_PROTOCOL_DICT_SERIALIZE (this, this_args_cbk->xdata,
                                             &rsp_args->xdata.xdata_val,
                                             rsp_args->xdata.xdata_len,
@@ -2762,6 +2806,12 @@ server_populate_compound_response (xlator_t *this, gfs3_compound_rsp *rsp,
 
                 rsp_args = &this_rsp->compound_rsp_u.compound_removexattr_rsp;
 
+                if (replace_old_iatt_in_dict (this_args_cbk->xdata)) {
+                        rsp_args->op_errno = errno;
+                        rsp_args->op_ret = -1;
+                        goto out;
+                }
+
                 GF_PROTOCOL_DICT_SERIALIZE (this, this_args_cbk->xdata,
                                             &rsp_args->xdata.xdata_val,
                                             rsp_args->xdata.xdata_len,
@@ -3093,6 +3143,12 @@ server_populate_compound_response (xlator_t *this, gfs3_compound_rsp *rsp,
 
                 rsp_args = &this_rsp->compound_rsp_u.compound_setxattr_rsp;
 
+                if (replace_old_iatt_in_dict (this_args_cbk->xdata)) {
+                        rsp_args->op_errno = errno;
+                        rsp_args->op_ret = -1;
+                        goto out;
+                }
+
                 GF_PROTOCOL_DICT_SERIALIZE (this, this_args_cbk->xdata,
                                             &rsp_args->xdata.xdata_val,
                                             rsp_args->xdata.xdata_len,
@@ -3197,6 +3253,12 @@ server_populate_compound_response (xlator_t *this, gfs3_compound_rsp *rsp,
 
                 rsp_args = &this_rsp->compound_rsp_u.compound_fremovexattr_rsp;
 
+                if (replace_old_iatt_in_dict (this_args_cbk->xdata)) {
+                        rsp_args->op_errno = errno;
+                        rsp_args->op_ret = -1;
+                        goto out;
+                }
+
                 GF_PROTOCOL_DICT_SERIALIZE (this, this_args_cbk->xdata,
                                             &rsp_args->xdata.xdata_val,
                                             rsp_args->xdata.xdata_len,
diff --git a/xlators/protocol/server/src/server-helpers.h b/xlators/protocol/server/src/server-helpers.h
index b89105a355f..73e2b89b21f 100644
--- a/xlators/protocol/server/src/server-helpers.h
+++ b/xlators/protocol/server/src/server-helpers.h
@@ -74,6 +74,8 @@ getactivelkinfo_rsp_cleanup (gfs3_getactivelk_rsp  *rsp);
 int
 getactivelkinfo_rsp_cleanup_v2 (gfx_getactivelk_rsp  *rsp);
 
+int replace_old_iatt_in_dict (dict_t *);
+
 int
 server_populate_compound_response (xlator_t *this, gfs3_compound_rsp *rsp,
                                    call_frame_t *frame,
diff --git a/xlators/protocol/server/src/server-rpc-fops.c b/xlators/protocol/server/src/server-rpc-fops.c
index 2c3f71bb245..45cd5b68048 100644
--- a/xlators/protocol/server/src/server-rpc-fops.c
+++ b/xlators/protocol/server/src/server-rpc-fops.c
@@ -724,6 +724,12 @@ server_removexattr_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
         server_state_t      *state = NULL;
         gf_loglevel_t        loglevel = GF_LOG_NONE;
 
+        if (replace_old_iatt_in_dict (xdata)) {
+                op_errno = errno;
+                op_ret = -1;
+                goto out;
+        }
+
         GF_PROTOCOL_DICT_SERIALIZE (this, xdata, &rsp.xdata.xdata_val,
                                     rsp.xdata.xdata_len, op_errno, out);
 
@@ -766,6 +772,12 @@ server_fremovexattr_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
         rpcsvc_request_t    *req   = NULL;
         server_state_t      *state = NULL;
 
+        if (replace_old_iatt_in_dict (xdata)) {
+                op_errno = errno;
+                op_ret = -1;
+                goto out;
+        }
+
         GF_PROTOCOL_DICT_SERIALIZE (this, xdata, &rsp.xdata.xdata_val,
                                     rsp.xdata.xdata_len, op_errno, out);
 
@@ -909,6 +921,12 @@ server_setxattr_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
         rpcsvc_request_t *req = NULL;
         server_state_t      *state = NULL;
 
+        if (replace_old_iatt_in_dict (xdata)) {
+                op_errno = errno;
+                op_ret = -1;
+                goto out;
+        }
+
         GF_PROTOCOL_DICT_SERIALIZE (this, xdata, &rsp.xdata.xdata_val,
                                     rsp.xdata.xdata_len, op_errno, out);
 
@@ -974,6 +992,12 @@ server_fsetxattr_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
         rpcsvc_request_t *req = NULL;
         server_state_t      *state = NULL;
 
+        if (replace_old_iatt_in_dict (xdata)) {
+                op_errno = errno;
+                op_ret = -1;
+                goto out;
+        }
+
         GF_PROTOCOL_DICT_SERIALIZE (this, xdata, &rsp.xdata.xdata_val,
                                     rsp.xdata.xdata_len, op_errno, out);
 
@@ -1066,6 +1090,12 @@ server_unlink_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
         server_state_t      *state  = NULL;
         rpcsvc_request_t    *req    = NULL;
 
+        if (replace_old_iatt_in_dict (xdata)) {
+                op_errno = errno;
+                op_ret = -1;
+                goto out;
+        }
+
         GF_PROTOCOL_DICT_SERIALIZE (this, xdata, &rsp.xdata.xdata_val,
                                     rsp.xdata.xdata_len, op_errno, out);