protocol: add getactivelk () fop

Change-Id: Ie38198db990f133fe163ba160cdf647e34f83f4f
BUG: 1326085
Signed-off-by: Susant Palai <spalai@redhat.com>
Reviewed-on: http://review.gluster.org/13994
Reviewed-by: Niels de Vos <ndevos@redhat.com>
Smoke: Gluster Build System <jenkins@build.gluster.com>
NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
CentOS-regression: Gluster Build System <jenkins@build.gluster.com>

11 files changed, 436 insertions, 2 deletions

diff --git a/libglusterfs/src/mem-types.h b/libglusterfs/src/mem-types.h
index 09d096b83f5..958de8bc634 100644
--- a/libglusterfs/src/mem-types.h
+++ b/libglusterfs/src/mem-types.h
@@ -165,6 +165,8 @@ enum gf_common_mem_types_ {
         gf_mt_compound_req_t,
         gf_mt_compound_rsp_t,
         gf_common_mt_tw_timer_list,
+        /*lock migration*/
+        gf_common_mt_lock_mig,
         gf_common_mt_end
 };
 #endif
diff --git a/rpc/rpc-lib/src/protocol-common.h b/rpc/rpc-lib/src/protocol-common.h
index e711f33b00f..ae6189d2e9b 100644
--- a/rpc/rpc-lib/src/protocol-common.h
+++ b/rpc/rpc-lib/src/protocol-common.h
@@ -63,8 +63,9 @@ enum gf_fop_procnum {
         GFS3_OP_SEEK,
         GFS3_OP_COMPOUND,
         GFS3_OP_LEASE,
+        GFS3_OP_GETACTIVELK,
         GFS3_OP_MAXVALUE,
-} ;
+};
 
 enum gf_handshake_procnum {
         GF_HNDSK_NULL,
diff --git a/rpc/xdr/src/glusterfs3-xdr.x b/rpc/xdr/src/glusterfs3-xdr.x
index 33f1a9357cf..f0c5f12301f 100644
--- a/rpc/xdr/src/glusterfs3-xdr.x
+++ b/rpc/xdr/src/glusterfs3-xdr.x
@@ -962,3 +962,21 @@ struct gfs3_compound_rsp {
         compound_rsp  compound_rsp_array<>;
         opaque        xdata<>;
 };
+
+struct gfs3_locklist {
+        struct gf_proto_flock flock;
+        string client_uid<>;
+        struct gfs3_locklist *nextentry;
+};
+
+struct gfs3_getactivelk_rsp {
+        int op_ret;
+        int op_errno;
+        struct gfs3_locklist *reply;
+        opaque xdata<>;
+};
+
+struct gfs3_getactivelk_req {
+        opaque gfid[16];
+        opaque xdata<>;
+};
diff --git a/xlators/protocol/client/src/client-helpers.c b/xlators/protocol/client/src/client-helpers.c
index e78242ffe65..c28a7cb4cbd 100644
--- a/xlators/protocol/client/src/client-helpers.c
+++ b/xlators/protocol/client/src/client-helpers.c
@@ -1750,3 +1750,59 @@ compound_request_cleanup (gfs3_compound_req *req)
 
         return;
 }
+
+void
+clnt_getactivelk_rsp_cleanup (gfs3_getactivelk_rsp *rsp)
+{
+        gfs3_locklist   *trav = NULL;
+        gfs3_locklist   *next = NULL;
+
+        trav = rsp->reply;
+
+        while (trav) {
+                next = trav->nextentry;
+                free (trav->client_uid);
+                free (trav);
+                trav = next;
+        }
+}
+
+int
+clnt_unserialize_rsp_locklist (xlator_t *this, struct gfs3_getactivelk_rsp *rsp,
+                               lock_migration_info_t *lmi)
+{
+        struct gfs3_locklist            *trav           = NULL;
+        lock_migration_info_t           *temp           = NULL;
+        char                            *buf            = NULL;
+        int                             entry_len       = 0;
+        int                             ret             = -1;
+        clnt_conf_t                     *conf           = NULL;
+
+        trav = rsp->reply;
+
+        conf = this->private;
+        if (!conf)
+                goto out;
+
+        while (trav) {
+                temp = GF_CALLOC (1, sizeof (*lmi), gf_common_mt_lock_mig);
+                if (temp == NULL) {
+                        gf_msg (this->name, GF_LOG_ERROR, 0, 0, "No memory");
+                        goto out;
+                }
+
+                INIT_LIST_HEAD (&temp->list);
+
+                gf_proto_flock_to_flock (&trav->flock, &temp->flock);
+
+                temp->client_uid =  gf_strdup (trav->client_uid);
+
+                list_add_tail (&temp->list, &lmi->list);
+
+                trav = trav->nextentry;
+        }
+
+        ret = 0;
+out:
+        return ret;
+}
diff --git a/xlators/protocol/client/src/client-rpc-fops.c b/xlators/protocol/client/src/client-rpc-fops.c
index a80c9e610d8..3b4f1c45ed0 100644
--- a/xlators/protocol/client/src/client-rpc-fops.c
+++ b/xlators/protocol/client/src/client-rpc-fops.c
@@ -3029,6 +3029,70 @@ client3_3_releasedir_cbk (struct rpc_req *req, struct iovec *iov, int count,
         return 0;
 }
 
+static int
+client3_3_getactivelk_cbk (struct rpc_req *req, struct iovec *iov, int count,
+                           void *myframe)
+{
+        call_frame_t            *frame = NULL;
+        gfs3_getactivelk_rsp   rsp   = {0,};
+        int32_t                 ret   = 0;
+        clnt_local_t            *local = NULL;
+        lock_migration_info_t   locklist;
+        xlator_t                *this  = NULL;
+        dict_t                  *xdata = NULL;
+
+        this = THIS;
+
+        frame = myframe;
+        local = frame->local;
+
+        if (-1 == req->rpc_status) {
+                rsp.op_ret   = -1;
+                rsp.op_errno = ENOTCONN;
+                goto out;
+        }
+
+        ret = xdr_to_generic (*iov, &rsp, (xdrproc_t)xdr_gfs3_getactivelk_rsp);
+        if (ret < 0) {
+                gf_msg (this->name, GF_LOG_ERROR, EINVAL,
+                        PC_MSG_XDR_DECODING_FAILED, "XDR decoding failed");
+                rsp.op_ret   = -1;
+                rsp.op_errno = EINVAL;
+                goto out;
+        }
+
+        INIT_LIST_HEAD (&locklist.list);
+
+        if (rsp.op_ret > 0) {
+                clnt_unserialize_rsp_locklist (this, &rsp, &locklist);
+        }
+
+        GF_PROTOCOL_DICT_UNSERIALIZE (this, xdata, (rsp.xdata.xdata_val),
+                                      (rsp.xdata.xdata_len), ret,
+                                      rsp.op_errno, out);
+
+out:
+        if (rsp.op_ret == -1) {
+                gf_msg (this->name, GF_LOG_WARNING,
+                        gf_error_to_errno (rsp.op_errno),
+                        PC_MSG_REMOTE_OP_FAILED,
+                        "remote operation failed");
+        }
+
+        CLIENT_STACK_UNWIND (getactivelk, frame, rsp.op_ret,
+                             gf_error_to_errno (rsp.op_errno), &locklist,
+                             xdata);
+
+        free (rsp.xdata.xdata_val);
+
+        if (xdata)
+                dict_unref (xdata);
+
+        clnt_getactivelk_rsp_cleanup (&rsp);
+
+        return 0;
+}
+
 int
 client3_3_compound_cbk (struct rpc_req *req, struct iovec *iov, int count,
                         void *myframe)
@@ -6117,9 +6181,58 @@ unwind:
         return 0;
 }
 
-/* Table Specific to FOPS */
+static int32_t
+client3_3_getactivelk (call_frame_t *frame, xlator_t *this,
+                        void *data)
+{
+        clnt_conf_t   *conf             = NULL;
+        clnt_args_t   *args             = NULL;
+        gfs3_getactivelk_req  req      = {{0,},};
+        int            ret              = 0;
+        int            op_errno         = ESTALE;
+
+        if (!frame || !this || !data)
+                goto unwind;
+
+        args = data;
+        if (!(args->loc && args->loc->inode))
+                goto unwind;
+
+        if (!gf_uuid_is_null (args->loc->inode->gfid))
+                memcpy (req.gfid,  args->loc->inode->gfid, 16);
+        else
+                memcpy (req.gfid, args->loc->gfid, 16);
+
+        GF_ASSERT_AND_GOTO_WITH_ERROR (this->name,
+                                       !gf_uuid_is_null (*((uuid_t *)req.gfid)),
+                                       unwind, op_errno, EINVAL);
+        conf = this->private;
+
+        GF_PROTOCOL_DICT_SERIALIZE (this, args->xdata, (&req.xdata.xdata_val),
+                                    req.xdata.xdata_len, op_errno, unwind);
+
+        ret = client_submit_request (this, &req, frame, conf->fops,
+                                     GFS3_OP_GETACTIVELK,
+                                     client3_3_getactivelk_cbk, NULL,
+                                     NULL, 0, NULL, 0, NULL,
+                                     (xdrproc_t)xdr_gfs3_getactivelk_req);
+        if (ret) {
+                gf_msg (this->name, GF_LOG_WARNING, 0, PC_MSG_FOP_SEND_FAILED,
+                        "failed to send the fop");
+        }
+
+        GF_FREE (req.xdata.xdata_val);
+
+        return 0;
+unwind:
+        CLIENT_STACK_UNWIND (getactivelk, frame, -1, op_errno, NULL, NULL);
+
+        GF_FREE (req.xdata.xdata_val);
 
+        return 0;
+}
 
+/* Table Specific to FOPS */
 rpc_clnt_procedure_t clnt3_3_fop_actors[GF_FOP_MAXVALUE] = {
         [GF_FOP_NULL]         = { "NULL",         NULL},
         [GF_FOP_STAT]         = { "STAT",         client3_3_stat },
@@ -6172,6 +6285,8 @@ rpc_clnt_procedure_t clnt3_3_fop_actors[GF_FOP_MAXVALUE] = {
         [GF_FOP_IPC]          = { "IPC",          client3_3_ipc },
         [GF_FOP_SEEK]         = { "SEEK",         client3_3_seek },
         [GF_FOP_LEASE]        = { "LEASE",        client3_3_lease },
+        [GF_FOP_GETACTIVELK]  = { "GETACTIVELK", client3_3_getactivelk},
+
 };
 
 /* Used From RPC-CLNT library to log proper name of procedure based on number */
@@ -6226,6 +6341,7 @@ char *clnt3_3_fop_names[GFS3_OP_MAXVALUE] = {
         [GFS3_OP_IPC]         = "IPC",
         [GFS3_OP_SEEK]        = "SEEK",
         [GFS3_OP_LEASE]       = "LEASE",
+        [GFS3_OP_GETACTIVELK] = "GETACTIVELK",
 };
 
 rpc_clnt_prog_t clnt3_3_fop_prog = {
diff --git a/xlators/protocol/client/src/client.c b/xlators/protocol/client/src/client.c
index c37c1e25b44..4810f75ac25 100644
--- a/xlators/protocol/client/src/client.c
+++ b/xlators/protocol/client/src/client.c
@@ -2066,6 +2066,33 @@ out:
         return 0;
 }
 
+int32_t
+client_getactivelk (call_frame_t *frame, xlator_t *this, loc_t *loc,
+                     dict_t *xdata)
+{
+        int          ret                = -1;
+        clnt_conf_t *conf               = NULL;
+        rpc_clnt_procedure_t *proc      = NULL;
+        clnt_args_t  args               = {0,};
+
+        conf = this->private;
+        if (!conf || !conf->fops)
+                goto out;
+
+
+        args.loc = loc;
+        args.xdata = xdata;
+
+        proc = &conf->fops->proctable[GF_FOP_GETACTIVELK];
+        if (proc->fn)
+                ret = proc->fn (frame, this, &args);
+out:
+        if (ret)
+                STACK_UNWIND_STRICT (getactivelk, frame, -1, ENOTCONN, NULL,
+                                     NULL);
+
+        return 0;
+}
 
 int32_t
 client_getspec (call_frame_t *frame, xlator_t *this, const char *key,
@@ -2893,6 +2920,7 @@ struct xlator_fops fops = {
         .seek        = client_seek,
         .lease       = client_lease,
         .compound    = client_compound,
+        .getactivelk = client_getactivelk,
 };
 
 
diff --git a/xlators/protocol/client/src/client.h b/xlators/protocol/client/src/client.h
index efa9d21437a..c12c45605b5 100644
--- a/xlators/protocol/client/src/client.h
+++ b/xlators/protocol/client/src/client.h
@@ -360,4 +360,10 @@ client_process_response (call_frame_t *frame, xlator_t *this,
                          int index);
 void
 compound_request_cleanup (gfs3_compound_req *req);
+
+int
+clnt_unserialize_rsp_locklist (xlator_t *this, struct gfs3_getactivelk_rsp *rsp,
+                               lock_migration_info_t *lmi);
+void
+clnt_getactivelk_rsp_cleanup (gfs3_getactivelk_rsp *rsp);
 #endif /* !_CLIENT_H */
diff --git a/xlators/protocol/server/src/server-helpers.c b/xlators/protocol/server/src/server-helpers.c
index e1cf4219817..146c13c3c2f 100644
--- a/xlators/protocol/server/src/server-helpers.c
+++ b/xlators/protocol/server/src/server-helpers.c
@@ -985,6 +985,77 @@ readdirp_rsp_cleanup (gfs3_readdirp_rsp *rsp)
         return 0;
 }
 
+int
+serialize_rsp_locklist (lock_migration_info_t *locklist,
+                               gfs3_getactivelk_rsp *rsp)
+{
+        lock_migration_info_t   *tmp    = NULL;
+        gfs3_locklist           *trav   = NULL;
+        gfs3_locklist           *prev   = NULL;
+        int                     ret     = -1;
+
+        GF_VALIDATE_OR_GOTO ("server", locklist, out);
+        GF_VALIDATE_OR_GOTO ("server", rsp, out);
+
+        list_for_each_entry (tmp, &locklist->list, list) {
+                trav = GF_CALLOC (1, sizeof (*trav), gf_server_mt_lock_mig_t);
+                if (!trav)
+                        goto out;
+
+                switch (tmp->flock.l_type) {
+                case F_RDLCK:
+                        tmp->flock.l_type = GF_LK_F_RDLCK;
+                        break;
+                case F_WRLCK:
+                        tmp->flock.l_type = GF_LK_F_WRLCK;
+                        break;
+                case F_UNLCK:
+                        tmp->flock.l_type = GF_LK_F_UNLCK;
+                        break;
+
+                default:
+                        gf_msg (THIS->name, GF_LOG_ERROR, 0, PS_MSG_LOCK_ERROR,
+                                "Unknown lock type: %"PRId32"!",
+                                tmp->flock.l_type);
+                        break;
+                }
+
+                gf_proto_flock_from_flock (&trav->flock, &tmp->flock);
+
+                trav->client_uid = tmp->client_uid;
+
+                if (prev)
+                        prev->nextentry = trav;
+                else
+                        rsp->reply = trav;
+
+                prev = trav;
+                trav = NULL;
+        }
+
+        ret = 0;
+out:
+        GF_FREE (trav);
+        return ret;
+}
+
+int
+getactivelkinfo_rsp_cleanup (gfs3_getactivelk_rsp  *rsp)
+{
+        gfs3_locklist  *prev = NULL;
+        gfs3_locklist  *trav = NULL;
+
+        trav = rsp->reply;
+        prev = trav;
+
+        while (trav) {
+                trav = trav->nextentry;
+                GF_FREE (prev);
+                prev = trav;
+        }
+
+        return 0;
+}
 
 int
 gf_server_check_getxattr_cmd (call_frame_t *frame, const char *key)
diff --git a/xlators/protocol/server/src/server-helpers.h b/xlators/protocol/server/src/server-helpers.h
index 6cc5829e7df..78b4bf08343 100644
--- a/xlators/protocol/server/src/server-helpers.h
+++ b/xlators/protocol/server/src/server-helpers.h
@@ -62,4 +62,10 @@ int server_process_event_upcall (xlator_t *this, void *data);
 inode_t *
 server_inode_new (inode_table_t *itable, uuid_t gfid);
 
+int
+serialize_rsp_locklist (lock_migration_info_t *locklist,
+                                                 gfs3_getactivelk_rsp *rsp);
+
+int
+getactivelkinfo_rsp_cleanup (gfs3_getactivelk_rsp  *rsp);
 #endif /* !_SERVER_HELPERS_H */
diff --git a/xlators/protocol/server/src/server-mem-types.h b/xlators/protocol/server/src/server-mem-types.h
index 9e2fcbc645f..38921884e83 100644
--- a/xlators/protocol/server/src/server-mem-types.h
+++ b/xlators/protocol/server/src/server-mem-types.h
@@ -26,6 +26,7 @@ enum gf_server_mem_types_ {
         gf_server_mt_volfile_ctx_t,
         gf_server_mt_timer_data_t,
         gf_server_mt_setvolume_rsp_t,
+        gf_server_mt_lock_mig_t,
         gf_server_mt_end,
 };
 #endif /* __SERVER_MEM_TYPES_H__ */
diff --git a/xlators/protocol/server/src/server-rpc-fops.c b/xlators/protocol/server/src/server-rpc-fops.c
index adfeb6464c8..8a1b14bf7f6 100644
--- a/xlators/protocol/server/src/server-rpc-fops.c
+++ b/xlators/protocol/server/src/server-rpc-fops.c
@@ -3301,7 +3301,79 @@ err:
         return 0;
 }
 
+static int
+server_getactivelk_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+                        int32_t op_ret, int32_t op_errno,
+                        lock_migration_info_t *locklist, dict_t *xdata)
+{
+        gfs3_getactivelk_rsp    rsp     = {0,};
+        server_state_t          *state  = NULL;
+        rpcsvc_request_t        *req    = NULL;
+        int                     ret     = 0;
+
+        state = CALL_STATE (frame);
+
+        GF_PROTOCOL_DICT_SERIALIZE (this, xdata, &rsp.xdata.xdata_val,
+                                    rsp.xdata.xdata_len, op_errno, out);
+
+        if (op_ret < 0) {
+                state = CALL_STATE (frame);
+
+                gf_msg (this->name, GF_LOG_INFO,
+                        op_errno, 0,
+                        "%"PRId64": GETACTIVELK %s (%s) ==> (%s)",
+                        frame->root->unique, state->loc.path,
+                        uuid_utoa (state->resolve.gfid),
+                        strerror (op_errno));
+
+                goto out;
+        }
+
+        /* (op_ret == 0) means there are no locks on the file*/
+        if (op_ret > 0) {
+                ret = serialize_rsp_locklist (locklist, &rsp);
+                if (ret == -1) {
+                        op_ret   = -1;
+                        op_errno = ENOMEM;
+                        goto out;
+                }
+        }
 
+out:
+        rsp.op_ret    = op_ret;
+        rsp.op_errno  = gf_errno_to_error (op_errno);
+
+        req = frame->local;
+
+        server_submit_reply (frame, req, &rsp, NULL, 0, NULL,
+                             (xdrproc_t)xdr_gfs3_getactivelk_rsp);
+
+        GF_FREE (rsp.xdata.xdata_val);
+
+        getactivelkinfo_rsp_cleanup (&rsp);
+
+        return 0;
+}
+
+int
+server_getactivelk_resume (call_frame_t *frame, xlator_t *bound_xl)
+{
+        server_state_t *state = NULL;
+
+        state = CALL_STATE (frame);
+
+        if (state->resolve.op_ret != 0)
+                goto err;
+
+        STACK_WIND (frame, server_getactivelk_cbk, bound_xl,
+                    bound_xl->fops->getactivelk, &state->loc, state->xdata);
+        return 0;
+err:
+        server_getactivelk_cbk (frame, NULL, frame->this, state->resolve.op_ret,
+                                state->resolve.op_errno, NULL, NULL);
+        return 0;
+
+}
 
 /* Fop section */
 
@@ -6517,6 +6589,62 @@ out:
         return ret;
 }
 
+static int
+server3_3_getactivelk (rpcsvc_request_t *req)
+{
+        server_state_t          *state          = NULL;
+        call_frame_t            *frame          = NULL;
+        gfs3_getactivelk_req   args            = {{0,},};
+        size_t                  headers_size    = 0;
+        int                     ret             = -1;
+        int                     op_errno        = 0;
+
+        if (!req)
+                return ret;
+
+        ret = xdr_to_generic (req->msg[0], &args,
+                              (xdrproc_t)xdr_gfs3_getactivelk_req);
+        if (ret < 0) {
+                SERVER_REQ_SET_ERROR (req, ret);
+                goto out;
+        }
+
+        frame = get_frame_from_request (req);
+        if (!frame) {
+                SERVER_REQ_SET_ERROR (req, ret);
+                goto out;
+        }
+        frame->root->op = GF_FOP_GETACTIVELK;
+
+        state = CALL_STATE (frame);
+        if (!frame->root->client->bound_xl) {
+                SERVER_REQ_SET_ERROR (req, ret);
+                goto out;
+        }
+
+        state->resolve.type = RESOLVE_MUST;
+        memcpy (state->resolve.gfid, args.gfid, 16);
+
+        /* here, dict itself works as xdata */
+        GF_PROTOCOL_DICT_UNSERIALIZE (frame->root->client->bound_xl,
+                                      state->xdata,
+                                      (args.xdata.xdata_val),
+                                      (args.xdata.xdata_len), ret,
+                                      op_errno, out);
+
+
+        ret = 0;
+        resolve_and_resume (frame, server_getactivelk_resume);
+out:
+        free (args.xdata.xdata_val);
+
+        if (op_errno)
+                SERVER_REQ_SET_ERROR (req, ret);
+
+        free (args.xdata.xdata_val);
+
+        return ret;
+}
 
 rpcsvc_actor_t glusterfs3_3_fop_actors[GLUSTER_FOP_PROCCNT] = {
         [GFS3_OP_NULL]         = {"NULL",         GFS3_OP_NULL,         server_null,            NULL, 0, DRC_NA},
@@ -6569,6 +6697,7 @@ rpcsvc_actor_t glusterfs3_3_fop_actors[GLUSTER_FOP_PROCCNT] = {
         [GFS3_OP_IPC]          = {"IPC",          GFS3_OP_IPC,          server3_3_ipc,          NULL, 0, DRC_NA},
         [GFS3_OP_SEEK]         = {"SEEK",         GFS3_OP_SEEK,         server3_3_seek,         NULL, 0, DRC_NA},
         [GFS3_OP_LEASE]       =  {"LEASE",        GFS3_OP_LEASE,        server3_3_lease,        NULL, 0, DRC_NA},
+        [GFS3_OP_GETACTIVELK] = {"GETACTIVELK", GFS3_OP_GETACTIVELK, server3_3_getactivelk, NULL, 0, DRC_NA},
 };