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-rw-r--r--api/src/glfs.c546
1 files changed, 546 insertions, 0 deletions
diff --git a/api/src/glfs.c b/api/src/glfs.c
new file mode 100644
index 00000000000..830efb23d65
--- /dev/null
+++ b/api/src/glfs.c
@@ -0,0 +1,546 @@
+/*
+ Copyright (c) 2012 Red Hat, Inc. <http://www.redhat.com>
+ This file is part of GlusterFS.
+
+ This file is licensed to you under your choice of the GNU Lesser
+ General Public License, version 3 or any later version (LGPLv3 or
+ later), or the GNU General Public License, version 2 (GPLv2), in all
+ cases as published by the Free Software Foundation.
+*/
+
+
+/*
+ TODO:
+ - set proper pid/lk_owner to call frames (currently buried in syncop)
+ - fix logging.c/h to store logfp and loglevel in glusterfs_ctx_t and
+ reach it via THIS.
+ - fd migration on graph switch.
+ - update syncop functions to accept/return xdata. ???
+ - syncop_readv to not touch params if args.op_ret < 0.
+ - protocol/client to reconnect immediately after portmap disconnect.
+ - handle SEEK_END failure in _lseek()
+ - handle umask (per filesystem?)
+ - implement glfs_set_xlator_option(), like --xlator-option
+ - make itables LRU based
+ - implement glfs_fini()
+ - modify syncop_fsync() to accept 'dataonly' flag
+ - 0-copy for readv/writev
+*/
+
+#include <unistd.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <inttypes.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <limits.h>
+
+#ifndef _CONFIG_H
+#define _CONFIG_H
+#include "config.h"
+#endif
+
+#include "glusterfs.h"
+#include "logging.h"
+#include "stack.h"
+#include "event.h"
+#include "glfs-mem-types.h"
+#include "common-utils.h"
+#include "syncop.h"
+#include "call-stub.h"
+
+#include "glfs.h"
+#include "glfs-internal.h"
+
+
+static gf_boolean_t
+vol_assigned (cmd_args_t *args)
+{
+ return args->volfile || args->volfile_server;
+}
+
+
+static int
+glusterfs_ctx_defaults_init (glusterfs_ctx_t *ctx)
+{
+ call_pool_t *pool = NULL;
+ int ret = -1;
+ cmd_args_t *cmd_args = NULL;
+
+ xlator_mem_acct_init (THIS, glfs_mt_end);
+
+ cmd_args = &ctx->cmd_args;
+
+ ctx->process_uuid = generate_glusterfs_ctx_id ();
+ if (!ctx->process_uuid) {
+ goto err;
+ }
+
+ ctx->page_size = 128 * GF_UNIT_KB;
+
+ ctx->iobuf_pool = iobuf_pool_new ();
+ if (!ctx->iobuf_pool) {
+ goto err;
+ }
+
+ ctx->event_pool = event_pool_new (DEFAULT_EVENT_POOL_SIZE);
+ if (!ctx->event_pool) {
+ goto err;
+ }
+
+ ctx->env = syncenv_new (0);
+ if (!ctx->env) {
+ goto err;
+ }
+
+ pool = GF_CALLOC (1, sizeof (call_pool_t),
+ glfs_mt_call_pool_t);
+ if (!pool) {
+ goto err;
+ }
+
+ /* frame_mem_pool size 112 * 4k */
+ pool->frame_mem_pool = mem_pool_new (call_frame_t, 4096);
+ if (!pool->frame_mem_pool) {
+ goto err;
+ }
+ /* stack_mem_pool size 256 * 1024 */
+ pool->stack_mem_pool = mem_pool_new (call_stack_t, 1024);
+ if (!pool->stack_mem_pool) {
+ goto err;
+ }
+
+ ctx->stub_mem_pool = mem_pool_new (call_stub_t, 1024);
+ if (!ctx->stub_mem_pool) {
+ goto err;
+ }
+
+ ctx->dict_pool = mem_pool_new (dict_t, GF_MEMPOOL_COUNT_OF_DICT_T);
+ if (!ctx->dict_pool)
+ goto err;
+
+ ctx->dict_pair_pool = mem_pool_new (data_pair_t,
+ GF_MEMPOOL_COUNT_OF_DATA_PAIR_T);
+ if (!ctx->dict_pair_pool)
+ goto err;
+
+ ctx->dict_data_pool = mem_pool_new (data_t, GF_MEMPOOL_COUNT_OF_DATA_T);
+ if (!ctx->dict_data_pool)
+ goto err;
+
+ INIT_LIST_HEAD (&pool->all_frames);
+ INIT_LIST_HEAD (&ctx->cmd_args.xlator_options);
+ LOCK_INIT (&pool->lock);
+ ctx->pool = pool;
+
+ pthread_mutex_init (&(ctx->lock), NULL);
+
+ ret = 0;
+err:
+ if (ret && pool) {
+ if (pool->frame_mem_pool)
+ mem_pool_destroy (pool->frame_mem_pool);
+ if (pool->stack_mem_pool)
+ mem_pool_destroy (pool->stack_mem_pool);
+ GF_FREE (pool);
+ }
+
+ if (ret && ctx) {
+ if (ctx->stub_mem_pool)
+ mem_pool_destroy (ctx->stub_mem_pool);
+ if (ctx->dict_pool)
+ mem_pool_destroy (ctx->dict_pool);
+ if (ctx->dict_data_pool)
+ mem_pool_destroy (ctx->dict_data_pool);
+ if (ctx->dict_pair_pool)
+ mem_pool_destroy (ctx->dict_pair_pool);
+ }
+
+ return ret;
+}
+
+
+static int
+create_master (struct glfs *fs)
+{
+ int ret = 0;
+ xlator_t *master = NULL;
+
+ master = GF_CALLOC (1, sizeof (*master),
+ glfs_mt_xlator_t);
+ if (!master)
+ goto err;
+
+ master->name = gf_strdup ("gfapi");
+ if (!master->name)
+ goto err;
+
+ if (xlator_set_type (master, "mount/api") == -1) {
+ gf_log ("glfs", GF_LOG_ERROR,
+ "master xlator for %s initialization failed",
+ fs->volname);
+ goto err;
+ }
+
+ master->ctx = fs->ctx;
+ master->private = fs;
+ master->options = get_new_dict ();
+ if (!master->options)
+ goto err;
+
+
+ ret = xlator_init (master);
+ if (ret) {
+ gf_log ("glfs", GF_LOG_ERROR,
+ "failed to initialize gfapi translator");
+ goto err;
+ }
+
+ fs->ctx->master = master;
+ THIS = master;
+
+ return 0;
+
+err:
+ if (master) {
+ xlator_destroy (master);
+ }
+
+ return -1;
+}
+
+
+static FILE *
+get_volfp (struct glfs *fs)
+{
+ int ret = 0;
+ cmd_args_t *cmd_args = NULL;
+ FILE *specfp = NULL;
+ struct stat statbuf;
+
+ cmd_args = &fs->ctx->cmd_args;
+
+ ret = lstat (cmd_args->volfile, &statbuf);
+ if (ret == -1) {
+ gf_log ("glfs", GF_LOG_ERROR,
+ "%s: %s", cmd_args->volfile, strerror (errno));
+ return NULL;
+ }
+
+ if ((specfp = fopen (cmd_args->volfile, "r")) == NULL) {
+ gf_log ("glfs", GF_LOG_ERROR,
+ "volume file %s: %s",
+ cmd_args->volfile,
+ strerror (errno));
+ return NULL;
+ }
+
+ gf_log ("glfs", GF_LOG_DEBUG,
+ "loading volume file %s", cmd_args->volfile);
+
+ return specfp;
+}
+
+
+int
+glfs_volumes_init (struct glfs *fs)
+{
+ FILE *fp = NULL;
+ cmd_args_t *cmd_args = NULL;
+ int ret = 0;
+
+ cmd_args = &fs->ctx->cmd_args;
+
+ if (!vol_assigned (cmd_args))
+ return -1;
+
+ if (cmd_args->volfile_server) {
+ ret = glfs_mgmt_init (fs);
+ goto out;
+ }
+
+ fp = get_volfp (fs);
+
+ if (!fp) {
+ gf_log ("glfs", GF_LOG_ERROR,
+ "Cannot reach volume specification file");
+ ret = -1;
+ goto out;
+ }
+
+ ret = glfs_process_volfp (fs, fp);
+ if (ret)
+ goto out;
+
+out:
+ return ret;
+}
+
+
+///////////////////////////////////////////////////////////////////////////////
+
+
+struct glfs *
+glfs_from_glfd (struct glfs_fd *glfd)
+{
+ return ((xlator_t *)glfd->fd->inode->table->xl->ctx->master)->private;
+}
+
+
+void
+glfs_fd_destroy (struct glfs_fd *glfd)
+{
+ if (!glfd)
+ return;
+ if (glfd->fd)
+ fd_unref (glfd->fd);
+ GF_FREE (glfd);
+}
+
+
+xlator_t *
+glfs_fd_subvol (struct glfs_fd *glfd)
+{
+ xlator_t *subvol = NULL;
+
+ if (!glfd)
+ return NULL;
+
+ subvol = glfd->fd->inode->table->xl;
+
+ return subvol;
+}
+
+
+xlator_t *
+glfs_active_subvol (struct glfs *fs)
+{
+ xlator_t *subvol = NULL;
+ inode_table_t *itable = NULL;
+
+ pthread_mutex_lock (&fs->mutex);
+ {
+ while (!fs->init)
+ pthread_cond_wait (&fs->cond, &fs->mutex);
+
+ subvol = fs->active_subvol;
+ }
+ pthread_mutex_unlock (&fs->mutex);
+
+ if (!subvol)
+ return NULL;
+
+ if (!subvol->itable) {
+ itable = inode_table_new (0, subvol);
+ if (!itable) {
+ errno = ENOMEM;
+ return NULL;
+ }
+
+ subvol->itable = itable;
+
+ glfs_first_lookup (subvol);
+ }
+
+ return subvol;
+}
+
+
+static void *
+glfs_poller (void *data)
+{
+ struct glfs *fs = NULL;
+
+ fs = data;
+
+ event_dispatch (fs->ctx->event_pool);
+
+ return NULL;
+}
+
+
+struct glfs *
+glfs_new (const char *volname)
+{
+ struct glfs *fs = NULL;
+ int ret = -1;
+ glusterfs_ctx_t *ctx = NULL;
+
+ /* first globals init, for gf_mem_acct_enable_set () */
+ ret = glusterfs_globals_init ();
+ if (ret)
+ return NULL;
+
+ ctx = glusterfs_ctx_new ();
+ if (!ctx) {
+ return NULL;
+ }
+ THIS->ctx = ctx;
+
+ /* then ctx_defaults_init, for xlator_mem_acct_init(THIS) */
+ ret = glusterfs_ctx_defaults_init (ctx);
+ if (ret)
+ return NULL;
+
+ fs = GF_CALLOC (1, sizeof (*fs), glfs_mt_glfs_t);
+ if (!fs)
+ return NULL;
+ fs->ctx = ctx;
+
+ glfs_set_logging (fs, "/dev/null", 0);
+
+ fs->ctx->cmd_args.volfile_id = gf_strdup (volname);
+
+ fs->volname = gf_strdup (volname);
+
+ pthread_mutex_init (&fs->mutex, NULL);
+ pthread_cond_init (&fs->cond, NULL);
+
+ return fs;
+}
+
+
+int
+glfs_set_volfile (struct glfs *fs, const char *volfile)
+{
+ cmd_args_t *cmd_args = NULL;
+
+ cmd_args = &fs->ctx->cmd_args;
+
+ if (vol_assigned (cmd_args))
+ return -1;
+
+ cmd_args->volfile = gf_strdup (volfile);
+
+ return 0;
+}
+
+
+int
+glfs_set_volfile_server (struct glfs *fs, const char *transport,
+ const char *host, int port)
+{
+ cmd_args_t *cmd_args = NULL;
+
+ cmd_args = &fs->ctx->cmd_args;
+
+ if (vol_assigned (cmd_args))
+ return -1;
+
+ cmd_args->volfile_server = gf_strdup (host);
+ cmd_args->volfile_server_transport = gf_strdup (transport);
+ cmd_args->max_connect_attempts = 2;
+
+ return 0;
+}
+
+
+int
+glfs_set_logging (struct glfs *fs, const char *logfile, int loglevel)
+{
+ int ret = -1;
+
+ ret = gf_log_init (logfile);
+ if (ret)
+ return ret;
+
+ gf_log_set_loglevel (loglevel);
+
+ return ret;
+}
+
+
+int
+glfs_init_wait (struct glfs *fs)
+{
+ int ret = -1;
+
+ pthread_mutex_lock (&fs->mutex);
+ {
+ while (!fs->init)
+ pthread_cond_wait (&fs->cond,
+ &fs->mutex);
+ ret = fs->ret;
+ }
+ pthread_mutex_unlock (&fs->mutex);
+
+ return ret;
+}
+
+
+void
+glfs_init_done (struct glfs *fs, int ret)
+{
+ if (fs->init_cbk) {
+ fs->init_cbk (fs, ret);
+ return;
+ }
+
+ pthread_mutex_lock (&fs->mutex);
+ {
+ fs->init = 1;
+ fs->ret = ret;
+
+ pthread_cond_broadcast (&fs->cond);
+ }
+ pthread_mutex_unlock (&fs->mutex);
+}
+
+
+int
+glfs_init_common (struct glfs *fs)
+{
+ int ret = -1;
+
+ ret = create_master (fs);
+ if (ret)
+ return ret;
+
+ ret = pthread_create (&fs->poller, NULL, glfs_poller, fs);
+ if (ret)
+ return ret;
+
+ ret = glfs_volumes_init (fs);
+ if (ret)
+ return ret;
+
+ return ret;
+}
+
+
+int
+glfs_init_async (struct glfs *fs, glfs_init_cbk cbk)
+{
+ int ret = -1;
+
+ fs->init_cbk = cbk;
+
+ ret = glfs_init_common (fs);
+
+ return ret;
+}
+
+
+int
+glfs_init (struct glfs *fs)
+{
+ int ret = -1;
+
+ ret = glfs_init_common (fs);
+ if (ret)
+ return ret;
+
+ ret = glfs_init_wait (fs);
+
+ return ret;
+}
+
+
+int
+glfs_fini (struct glfs *fs)
+{
+ int ret = -1;
+
+ return ret;
+}
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