Introduce btr_node_status() and add btr support to the file writer.
[paraslash.git] / file_write.c
index 6ba8019..a9635ca 100644 (file)
@@ -18,6 +18,7 @@
 #include "ggo.h"
 #include "buffer_tree.h"
 #include "write.h"
+#include "write_common.h"
 #include "string.h"
 #include "fd.h"
 #include "file_write.cmdline.h"
@@ -87,6 +88,25 @@ static int file_write_pre_select(struct sched *s, struct writer_node *wn)
        return 1;
 }
 
+static void file_write_pre_select_btr(struct sched *s, struct task *t)
+{
+       struct writer_node *wn = container_of(t, struct writer_node, task);
+       struct private_file_write_data *pfwd = wn->private_data;
+       int ret;
+
+       t->error = 0;
+       pfwd->check_fd = 0;
+       ret = btr_node_status(wn->btrn, wn->min_iqs);
+       if (ret >= 0) {
+               para_fd_set(pfwd->fd, &s->wfds, &s->max_fileno);
+               pfwd->check_fd = 1;
+       }
+       if (ret != 0) {
+               s->timeout.tv_sec = 0;
+               s->timeout.tv_usec = 1;
+       }
+}
+
 static int file_write_post_select(struct sched *s, struct writer_node *wn)
 {
        struct private_file_write_data *pfwd = wn->private_data;
@@ -111,10 +131,45 @@ static int file_write_post_select(struct sched *s, struct writer_node *wn)
 static void file_write_close(struct writer_node *wn)
 {
        struct private_file_write_data *pfwd = wn->private_data;
+
        close(pfwd->fd);
+       file_cmdline_parser_free(wn->conf);
        free(pfwd);
 }
 
+static void file_write_post_select_btr(__a_unused struct sched *s,
+               struct task *t)
+{
+       struct writer_node *wn = container_of(t, struct writer_node, task);
+       struct private_file_write_data *pfwd = wn->private_data;
+       struct btr_node *btrn = wn->btrn;
+       int ret;
+       char *buf;
+       size_t bytes;
+
+       t->error = 0;
+       ret = btr_node_status(btrn, wn->min_iqs);
+       if (ret == 0)
+               return;
+       if (ret < 0)
+               goto err;
+       if (!pfwd->check_fd)
+               return;
+       if (!FD_ISSET(pfwd->fd, &s->wfds))
+               return;
+       bytes = btr_next_buffer(btrn, &buf);
+       assert(bytes > 0);
+       //PARA_INFO_LOG("writing %zu\n", bytes);
+       ret = write(pfwd->fd, buf, bytes);
+       if (ret < 0)
+               goto err;
+       btr_consume(btrn, ret);
+       return;
+err:
+       assert(ret < 0);
+       t->error = ret;
+}
+
 __malloc static void *file_write_parse_config(const char *options)
 {
        struct file_write_args_info *conf
@@ -136,7 +191,9 @@ void file_write_init(struct writer *w)
        file_cmdline_parser_init(&dummy);
        w->open = file_write_open;
        w->pre_select = file_write_pre_select;
+       w->pre_select_btr = file_write_pre_select_btr;
        w->post_select = file_write_post_select;
+       w->post_select_btr = file_write_post_select_btr;
        w->parse_config = file_write_parse_config;
        w->close = file_write_close;
        w->shutdown = NULL; /* nothing to do */