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ethanefs.c
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/*
* Copyright 2023 Regents of Nanjing University of Aeronautics and Astronautics and
* Hohai University, Miao Cai <[email protected]> and Junru Shen <[email protected]>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation, either version 3 of the License, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*
* ETHANE User-Space Library
*/
#define _GNU_SOURCE
#include <pthread.h>
#include <unistd.h>
#include <errno.h>
#include <prom.h>
#include <promhttp.h>
#include "trace.h"
#include "config.h"
#include "coro.h"
#include "dmlocktab.h"
#include "debug.h"
#include "ethanefs.h"
#include <fcntl.h>
#include "dmpool.h"
#include "dmm.h"
#include "bench.h"
#include "sharedfs.h"
#include "cachefs.h"
#include "logger.h"
#include "oplogger.h"
#define CHECK_CHKPT_VER_INTERVAL_US 100000
#define CHKPT_GC_INTERVAL 1024
#define STAT_REQ_INTERVAL 32
#define REQ_LAT_HIST_BUCKETS 16, 10.0, 20.0, 30.0, 40.0, 50.0, 60.0, 70.0, 80.0, 100.0, 125.0, 150.0, 175.0, 200.0, 250.0, 300.0, 400.0
#define MAX_READ_NR_EXTS 128
int debug_mode = 0;
struct ethanefs {
dmpool_t *pool;
dmm_cn_t *dmm;
zhandle_t *zh;
struct MHD_Daemon *prom_daemon;
};
struct ethanefs_cli {
ethanefs_t *fs;
dmcontext_t *ctx;
dmm_cli_t *dmm;
sharedfs_t *rfs;
logger_t *logger;
cachefs_t *cfs;
oplogger_t *oplogger;
dmlocktab_t *locktab;
uid_t uid;
gid_t gid;
int nr_ops;
dmptr_t chkpt_ver_remote_addr;
char path[PATH_MAX];
size_t cwd_len;
char label[64];
};
static prom_histogram_t *prom_req_lat;
static prom_histogram_t *prom_req_log_insert_lat;
static prom_histogram_t *prom_req_cfs_prefetch_lat;
static prom_histogram_t *prom_req_log_replay_lat;
static prom_histogram_t *prom_req_log_fetch_lat;
static prom_histogram_t *prom_req_log_read_lat;
static prom_histogram_t *prom_req_cfs_lat;
static prom_histogram_t *prom_req_nr_read_logs;
static void ethanefs_cli_init_global() {
prom_req_lat = prom_histogram_new("ethanefs_req_lat",
"Request latency",
prom_histogram_buckets_new(REQ_LAT_HIST_BUCKETS),
1, (const char *[]) { "cli_id" });
prom_req_log_insert_lat = prom_histogram_new("ethanefs_req_log_insert_lat",
"Request latency (log insert)",
prom_histogram_buckets_new(REQ_LAT_HIST_BUCKETS),
1, (const char *[]) { "cli_id" });
prom_req_cfs_prefetch_lat = prom_histogram_new("ethanefs_req_cfs_prefetch_lat",
"Request latency (cfs prefetch)",
prom_histogram_buckets_new(REQ_LAT_HIST_BUCKETS),
1, (const char *[]) { "cli_id" });
prom_req_log_replay_lat = prom_histogram_new("ethanefs_req_log_replay_lat",
"Request latency (log replay)",
prom_histogram_buckets_new(REQ_LAT_HIST_BUCKETS),
1, (const char *[]) { "cli_id" });
prom_req_log_fetch_lat = prom_histogram_new("ethanefs_req_log_fetch_lat",
"Request latency (log fetch)",
prom_histogram_buckets_new(REQ_LAT_HIST_BUCKETS),
1, (const char *[]) { "cli_id" });
prom_req_log_read_lat = prom_histogram_new("ethanefs_req_log_read_lat",
"Request latency (log read)",
prom_histogram_buckets_new(REQ_LAT_HIST_BUCKETS),
1, (const char *[]) { "cli_id" });
prom_req_cfs_lat = prom_histogram_new("ethanefs_req_cfs_lat",
"Request latency (cfs)",
prom_histogram_buckets_new(REQ_LAT_HIST_BUCKETS),
1, (const char *[]) { "cli_id" });
prom_req_nr_read_logs = prom_histogram_new("ethanefs_req_nr_read_logs",
"Number of read logs",
prom_histogram_buckets_linear(1, 1, 10),
1, (const char *[]) { "cli_id" });
prom_collector_registry_must_register_metric(prom_req_lat);
prom_collector_registry_must_register_metric(prom_req_log_insert_lat);
prom_collector_registry_must_register_metric(prom_req_cfs_prefetch_lat);
prom_collector_registry_must_register_metric(prom_req_log_replay_lat);
prom_collector_registry_must_register_metric(prom_req_log_fetch_lat);
prom_collector_registry_must_register_metric(prom_req_log_read_lat);
prom_collector_registry_must_register_metric(prom_req_cfs_lat);
prom_collector_registry_must_register_metric(prom_req_nr_read_logs);
}
void ethanefs_logger_init_global();
void ethanefs_kv_init_global();
ethanefs_t *ethanefs_init(zhandle_t *zh, int prom_daemon_port) {
ethanefs_t *fs;
fs = calloc(1, sizeof(ethanefs_t));
if (unlikely(!fs)) {
goto out;
}
fs->zh = zh;
fs->pool = dm_init(fs->zh);
fs->dmm = dmm_cn_init(fs->pool);
prom_collector_registry_default_init();
promhttp_set_active_collector_registry(NULL);
if (prom_daemon_port) {
fs->prom_daemon = promhttp_start_daemon(MHD_USE_SELECT_INTERNALLY, prom_daemon_port, NULL, NULL);
if (unlikely(!fs->prom_daemon)) {
pr_err("start prometheus daemon failed");
fs = ERR_PTR(-EINVAL);
goto out;
}
}
ethanefs_cli_init_global();
ethanefs_logger_init_global();
ethanefs_kv_init_global();
out:
return fs;
}
ethanefs_cli_t *ethanefs_cli_init(ethanefs_t *fs, struct ethane_cli_config *config) {
struct ethane_super *super;
ethanefs_cli_t *cli;
dmm_cli_t *dmm_ctx;
dmcontext_t *ctx;
int ret;
/* create disaggregated memory pool */
ctx = dm_create_context(fs->pool, config->net.local_buf_size_mb * 1024 * 1024);
/* create disaggregated memory manager */
dmm_ctx = dmm_cli_init(fs->dmm, ctx, config->dmm.pmem_initial_alloc_size_mb * 1024 * 1024);
/* create ethanefs client */
cli = calloc(1, sizeof(ethanefs_cli_t));
if (unlikely(!cli)) {
cli = ERR_PTR(-ENOMEM);
goto out;
}
cli->fs = fs;
cli->ctx = ctx;
cli->dmm = dmm_ctx;
/* read super block */
super = dm_push(ctx, NULL, sizeof(struct ethane_super));
ret = dm_copy_from_remote(ctx, super, ETHANE_SB_REMOTE_ADDR, sizeof(struct ethane_super), DMFLAG_ACK);
if (unlikely(IS_ERR(ret))) {
cli = ERR_PTR(ret);
goto out;
}
/* wait */
ret = dm_wait_ack(ctx, 1);
if (unlikely(IS_ERR(ret))) {
cli = ERR_PTR(ret);
goto out;
}
/* init lock table */
cli->locktab = dmlocktab_init(ctx, config->lock.nr_locks_order);
if (unlikely(!cli->locktab)) {
cli = ERR_PTR(-ENOMEM);
goto out;
}
/* init sharedfs */
cli->rfs = sharedfs_init(ctx, dmm_ctx, cli->locktab,
super->sharedfs_remote_addr, config->sharedfs.nr_max_outstanding_updates);
if (unlikely(IS_ERR(cli->rfs))) {
cli = ERR_PTR(PTR_ERR(cli->rfs));
goto out;
}
/* create logger */
cli->logger = logger_init(ctx, dmm_ctx, super->logger_remote_addr, oplogger_filter,
config->logger.local_log_region_size_mb * 1024 * 1024,
config->logger.log_read_batch_size, config->logger.global_shm_path);
if (unlikely(IS_ERR(cli->logger))) {
cli = ERR_PTR(PTR_ERR(cli->logger));
goto out;
}
/* init cacheFS */
cli->cfs = cachefs_init(ctx, dmm_ctx, cli->rfs,
config->cachefs.namespace_cache_size_max_mb * 1024 * 1024,
config->cachefs.namespace_cache_size_high_watermark_mb * 1024 * 1024,
config->cachefs.block_mapping_cache_size_max_mb * 1024 * 1024,
config->cachefs.block_mapping_cache_size_high_watermark_mb * 1024 * 1024);
if (unlikely(IS_ERR(cli->cfs))) {
cli = ERR_PTR(PTR_ERR(cli->cfs));
goto out;
}
/* init oplogger */
cli->oplogger = oplogger_init(cli->logger, cli->ctx, cli->cfs);
if (unlikely(IS_ERR(cli->oplogger))) {
cli = ERR_PTR(PTR_ERR(cli->oplogger));
goto out;
}
cli->chkpt_ver_remote_addr = ETHANE_SB_REMOTE_ADDR + offsetof(struct ethane_super, chkpt_ver);
sprintf(cli->label, "cli%06d", dm_get_cli_id(ctx));
cli->cwd_len = 0;
out:
return cli;
}
void ethanefs_set_user(ethanefs_cli_t *cli, uid_t uid, gid_t gid) {
cli->uid = uid;
cli->gid = gid;
}
void ethanefs_clean_cli(ethanefs_cli_t *cli) {
pr_info("clean cli %d", ethanefs_get_cli_id(cli));
cachefs_clean(cli->cfs);
oplogger_clean(cli->oplogger);
}
int ethanefs_format(zhandle_t *zh, struct ethane_fs_config *config) {
dmptr_t sharedfs_remote_addr, logger_remote_addr;
struct ethane_super *super;
dmm_cli_t *dmm_ctx;
dmcontext_t *ctx;
dmpool_t *pool;
dmm_cn_t *dmm;
int ret;
/* create disaggregated memory pool */
pool = dm_init(zh);
ctx = dm_create_context(pool, 1024 * 1024ul);
/* create disaggregated memory manager */
dmm = dmm_cn_init(pool);
/* clear blocks */
dmm_bclear(dmm, ctx);
dmm_ctx = dmm_cli_init(dmm, ctx, config->dmm.pmem_initial_alloc_size_mb * 1024 * 1024);
/* create sharedfs */
sharedfs_remote_addr = sharedfs_create(ctx, dmm_ctx,
config->sharedfs.interval_node_nr_blks_count,
config->sharedfs.interval_node_nr_blks,
config->sharedfs.namespace_kv_size_mb * 1024 * 1024,
config->sharedfs.block_mapping_kv_size_mb * 1024 * 1024,
config->sharedfs.kv_nr_shards);
/* create logger */
logger_remote_addr = logger_create(ctx, dmm_ctx,
config->logger.max_nr_logs, config->logger.arena_nr_logs);
/* fill super */
super = dm_push(ctx, NULL, sizeof(struct ethane_super));
super->magic = 0xaabbccddbeefdead;
super->sharedfs_remote_addr = sharedfs_remote_addr;
super->logger_remote_addr = logger_remote_addr;
super->chkpt_ver = 0;
/* write super */
ret = dm_copy_to_remote(ctx, ETHANE_SB_REMOTE_ADDR, super, sizeof(struct ethane_super), DMFLAG_ACK);
if (unlikely(IS_ERR(ret))) {
goto out;
}
/* wait */
ret = dm_wait_ack(ctx, 1);
if (unlikely(IS_ERR(ret))) {
goto out;
}
ret = 0;
out:
return ret;
}
static inline void get_oplogger_ctx(ethanefs_cli_t *cli, oplogger_t *oplogger, oplogger_ctx_t *oplogger_ctx) {
memset(oplogger_ctx, 0, sizeof(*oplogger_ctx));
oplogger_ctx->oplogger = oplogger;
oplogger_ctx->uid = cli->uid;
oplogger_ctx->gid = cli->gid;
oplogger_ctx->nr_shards = 0;
oplogger_ctx->shard = 0;
oplogger_ctx->replay_cb = NULL;
oplogger_ctx->wait_check = false;
}
static inline void set_oplogger_wait_check(ethanefs_cli_t *cli, oplogger_ctx_t *oplogger_ctx, bool wait_check) {
oplogger_ctx->wait_check = wait_check;
}
static inline void set_oplogger_private_data(ethanefs_cli_t *cli, oplogger_ctx_t *oplogger_ctx, void *priv) {
oplogger_ctx->priv = priv;
}
static inline void set_oplogger_shard(ethanefs_cli_t *cli, oplogger_ctx_t *oplogger_ctx, int nr_shards, int shard) {
oplogger_ctx->nr_shards = nr_shards;
oplogger_ctx->shard = shard;
}
static inline void set_replay_cb(ethanefs_cli_t *cli, oplogger_ctx_t *oplogger_ctx,
oplogger_replay_cb_t replay_cb, void *replay_ctx) {
oplogger_ctx->replay_cb = replay_cb;
oplogger_ctx->replay_ctx = replay_ctx;
}
static inline void get_cachefs_ctx(ethanefs_cli_t *cli, cachefs_ctx_t *cachefs_ctx) {
cachefs_ctx->uid = cli->uid;
cachefs_ctx->gid = cli->gid;
}
static inline dmptr_t alloc_dentry(ethanefs_cli_t *cli) {
dmm_cli_t *dmm_th = cli->dmm;
dmptr_t addr;
addr = dmm_balloc(dmm_th, DENTRY_SIZE, DENTRY_SIZE, DMPTR_NULL);
if (unlikely(IS_ERR(addr))) {
pr_err("alloc dentry page failed: %ld", PTR_ERR(addr));
}
return addr;
}
static inline int read_data(ethanefs_cli_t *cli, void *user_buf, size_t read_size, cachefs_blk_t *blks) {
dmcontext_t *ctx = cli->ctx;
void *buf;
int ret;
/* FIXME: */
ethane_assert(read_size == blks->size);
pr_debug("read_data: %p, %zu", user_buf, read_size);
dm_mark(cli->ctx);
buf = dm_push(ctx, NULL, read_size);
ret = dm_copy_from_remote(ctx, buf, blks->blk_remote_addr, read_size, DMFLAG_ACK);
if (unlikely(IS_ERR(ret))) {
goto out;
}
/* wait */
ret = dm_wait_ack(ctx, 1);
if (unlikely(IS_ERR(ret))) {
goto out;
}
memcpy(user_buf, buf, read_size);
out:
dm_pop(cli->ctx);
return ret;
}
static dmptr_t alloc_and_write_data(ethanefs_cli_t *cli, size_t size, const char *data) {
dmm_cli_t *dmm_th = cli->dmm;
dmptr_t remote_addr;
void *buf;
int ret;
dm_mark(cli->ctx);
remote_addr = dmm_balloc(dmm_th, ALIGN_UP(size, BLK_SIZE), BLK_SIZE, 0);
if (unlikely(IS_ERR(remote_addr))) {
pr_err("failed to alloc data block: %ld", PTR_ERR(remote_addr));
ret = PTR_ERR(remote_addr);
goto out;
}
pr_debug("alloc and write data: remote_addr=%lx@%d size=%lu", remote_addr, DMPTR_MN_ID(remote_addr), size);
buf = dm_push(cli->ctx, data, size);
ret = dm_copy_to_remote(cli->ctx, remote_addr, buf, size, 0);
if (unlikely(IS_ERR(ret))) {
remote_addr = ret;
goto out;
}
ret = dm_flush(cli->ctx, remote_addr, DMFLAG_ACK);
if (unlikely(IS_ERR(ret))) {
remote_addr = ret;
goto out;
}
/* We do not wait for ACK here, wait after dlog append to gain more parallelism. */
out:
dm_pop(cli->ctx);
return remote_addr;
}
static void check_cachefs_full(ethanefs_cli_t *cli) {
if (!cachefs_reached_max_size(cli->cfs)) {
return;
}
pr_err("cacheFS full (reached max size), force clean...");
ethanefs_clean_cli(cli);
}
static const char *get_path(ethanefs_cli_t *cli, const char *path) {
if (path[0] != '/') {
strcpy(cli->path + cli->cwd_len, "/");
strcat(cli->path + cli->cwd_len, path);
path = cli->path;
}
pr_debug("get_path: %s (cwd: %.*s)", path, (int) cli->cwd_len, cli->path);
return path;
}
int ethanefs_getattr(ethanefs_cli_t *cli, const char *path, struct stat *stbuf) {
oplogger_ctx_t oplogger_ctx;
cachefs_ctx_t cachefs_ctx;
long old_v;
int ret;
path = get_path(cli, path);
check_cachefs_full(cli);
get_oplogger_ctx(cli, cli->oplogger, &oplogger_ctx);
get_cachefs_ctx(cli, &cachefs_ctx);
old_v = oplogger_snapshot_begin(cli->oplogger, &oplogger_ctx);
ret = oplogger_replay_getattr(cli->oplogger, &oplogger_ctx, path, false, 0);
if (unlikely(ret < 0)) {
goto out;
}
oplogger_snapshot_end(cli->oplogger, &oplogger_ctx, old_v);
ret = oplogger_replay_getattr(cli->oplogger, &oplogger_ctx, path, false, 0);
if (unlikely(ret < 0)) {
goto out;
}
/* perform the actual operation */
ret = cachefs_getattr(cli->cfs, &cachefs_ctx, path, stbuf);
out:
return ret;
}
int ethanefs_mkdir(ethanefs_cli_t *cli, const char *path, mode_t mode) {
long log_insert_duration, log_replay_duration, cfs_prefetch_duration, cfs_duration, duration;
long log_read_duration, log_fetch_duration;
uint64_t result = OP_RESULT_UNDETERMINED;
struct bench_timer timer, op_timer;
dmptr_t dentry_remote_addr, log;
oplogger_ctx_t oplogger_ctx;
cachefs_ctx_t cachefs_ctx;
int ret, nr_read_logs;
size_t ver;
path = get_path(cli, path);
bench_timer_start(&op_timer);
nr_read_logs = logger_get_nr_read_logs(cli->logger);
log_fetch_duration = logger_get_fetch_duration(cli->logger);
log_read_duration = logger_get_read_duration(cli->logger);
check_cachefs_full(cli);
dentry_remote_addr = alloc_dentry(cli);
get_oplogger_ctx(cli, cli->oplogger, &oplogger_ctx);
get_cachefs_ctx(cli, &cachefs_ctx);
bench_timer_start(&timer);
/* append log */
log = oplogger_mkdir(cli->oplogger, &oplogger_ctx, path, mode, dentry_remote_addr);
if (unlikely(IS_ERR(log))) {
ret = PTR_ERR(log);
goto out;
}
log_insert_duration = bench_timer_end(&timer);
/* get current system version */
ver = oplogger_get_version(cli->oplogger, &oplogger_ctx);
bench_timer_start(&timer);
cachefs_prefetch_metadata(cli->cfs, path);
cfs_prefetch_duration = bench_timer_end(&timer);
bench_timer_start(&timer);
/* replay until the newly appended log */
ret = oplogger_replay_mkdir(cli->oplogger, &oplogger_ctx, path, true, 1);
if (unlikely(ret < 0)) {
goto out;
}
log_replay_duration = bench_timer_end(&timer);
bench_timer_start(&timer);
/* perform the actual operation */
ret = cachefs_mkdir(cli->cfs, &cachefs_ctx, path, &result, mode, dentry_remote_addr, ver);
cfs_duration = bench_timer_end(&timer);
/* change result async */
oplogger_set_result_async(cli->oplogger, log, result);
duration = bench_timer_end(&op_timer);
nr_read_logs = logger_get_nr_read_logs(cli->logger) - nr_read_logs;
log_fetch_duration = logger_get_fetch_duration(cli->logger) - log_fetch_duration;
log_read_duration = logger_get_read_duration(cli->logger) - log_read_duration;
tracepoint_sample(ethane, op_latency, dm_get_cli_id(cli->ctx), TRACE_OP_MKDIR,
log_insert_duration, log_replay_duration, cfs_prefetch_duration, cfs_duration, duration);
cli->nr_ops++;
if (cli->nr_ops % STAT_REQ_INTERVAL == 0) {
prom_histogram_observe(prom_req_lat, (double) duration / 1000, (const char *[]) { cli->label });
prom_histogram_observe(prom_req_log_insert_lat, (double) log_insert_duration / 1000, (const char *[]) { cli->label });
prom_histogram_observe(prom_req_cfs_prefetch_lat, (double) cfs_prefetch_duration / 1000, (const char *[]) { cli->label });
prom_histogram_observe(prom_req_log_replay_lat, (double) log_replay_duration / 1000, (const char *[]) { cli->label });
prom_histogram_observe(prom_req_log_fetch_lat, (double) log_fetch_duration / 1000, (const char *[]) { cli->label });
prom_histogram_observe(prom_req_log_read_lat, (double) log_read_duration / 1000, (const char *[]) { cli->label });
prom_histogram_observe(prom_req_cfs_lat, (double) cfs_duration / 1000, (const char *[]) { cli->label });
prom_histogram_observe(prom_req_nr_read_logs, (double) nr_read_logs, (const char *[]) { cli->label });
}
out:
return ret;
}
int ethanefs_rmdir(ethanefs_cli_t *cli, const char *path) {
uint64_t result = OP_RESULT_UNDETERMINED;
oplogger_ctx_t oplogger_ctx;
cachefs_ctx_t cachefs_ctx;
dmptr_t log;
size_t ver;
int ret;
path = get_path(cli, path);
check_cachefs_full(cli);
get_oplogger_ctx(cli, cli->oplogger, &oplogger_ctx);
get_cachefs_ctx(cli, &cachefs_ctx);
/* append log */
log = oplogger_rmdir(cli->oplogger, &oplogger_ctx, path);
if (unlikely(IS_ERR(log))) {
ret = PTR_ERR(log);
goto out;
}
/* get current system version */
ver = oplogger_get_version(cli->oplogger, &oplogger_ctx);
/* replay until the newly appended log */
ret = oplogger_replay_rmdir(cli->oplogger, &oplogger_ctx, path, true, 1);
if (unlikely(ret < 0)) {
goto out;
}
/* perform the actual operation */
ret = cachefs_rmdir(cli->cfs, &cachefs_ctx, path, &result, ver);
/* change result async */
oplogger_set_result_async(cli->oplogger, log, result);
out:
return ret;
}
int ethanefs_unlink(ethanefs_cli_t *cli, const char *path) {
uint64_t result = OP_RESULT_UNDETERMINED;
oplogger_ctx_t oplogger_ctx;
cachefs_ctx_t cachefs_ctx;
dmptr_t log;
size_t ver;
int ret;
path = get_path(cli, path);
check_cachefs_full(cli);
get_oplogger_ctx(cli, cli->oplogger, &oplogger_ctx);
get_cachefs_ctx(cli, &cachefs_ctx);
/* append log */
log = oplogger_unlink(cli->oplogger, &oplogger_ctx, path);
if (unlikely(IS_ERR(log))) {
ret = PTR_ERR(log);
goto out;
}
/* get current system version */
ver = oplogger_get_version(cli->oplogger, &oplogger_ctx);
/* replay until the newly appended log */
ret = oplogger_replay_unlink(cli->oplogger, &oplogger_ctx, path, true, 1);
if (unlikely(ret < 0)) {
goto out;
}
/* perform the actual operation */
ret = cachefs_unlink(cli->cfs, &cachefs_ctx, path, &result, ver);
/* change result async */
oplogger_set_result_async(cli->oplogger, log, result);
out:
return ret;
}
struct ethanefs_open_file {
struct ethane_open_file open_file;
};
ethanefs_open_file_t *ethanefs_create(ethanefs_cli_t *cli, const char *path, mode_t mode) {
uint64_t result = OP_RESULT_UNDETERMINED;
dmptr_t dentry_remote_addr, log;
struct ethane_open_file *file;
oplogger_ctx_t oplogger_ctx;
cachefs_ctx_t cachefs_ctx;
ethanefs_open_file_t *of;
size_t ver;
int ret;
path = get_path(cli, path);
check_cachefs_full(cli);
dentry_remote_addr = alloc_dentry(cli);
get_oplogger_ctx(cli, cli->oplogger, &oplogger_ctx);
get_cachefs_ctx(cli, &cachefs_ctx);
/* append log */
log = oplogger_create(cli->oplogger, &oplogger_ctx, path, mode, dentry_remote_addr);
if (unlikely(IS_ERR(log))) {
of = ERR_PTR(PTR_ERR(log));
goto out;
}
/* get current system version */
ver = oplogger_get_version(cli->oplogger, &oplogger_ctx);
/* replay until the newly appended log */
ret = oplogger_replay_create(cli->oplogger, &oplogger_ctx, path, true, 1);
if (unlikely(ret < 0)) {
of = ERR_PTR(ret);
goto out;
}
/* create open file */
file = malloc(sizeof(struct ethane_open_file) + strlen(path) + 1);
/* perform the actual operation */
ret = cachefs_create(cli->cfs, &cachefs_ctx, path, &result, mode, dentry_remote_addr, file, ver);
if (unlikely(ret < 0)) {
of = ERR_PTR(ret);
goto out;
}
if (!ret) {
of = (ethanefs_open_file_t *) file;
} else {
free(file);
of = ERR_PTR(ret);
}
/* change result async */
oplogger_set_result_async(cli->oplogger, log, result);
out:
return of;
}
ethanefs_open_file_t *ethanefs_open(ethanefs_cli_t *cli, const char *path) {
struct ethane_open_file *file;
oplogger_ctx_t oplogger_ctx;
cachefs_ctx_t cachefs_ctx;
ethanefs_open_file_t *of;
long old_v;
int ret;
path = get_path(cli, path);
check_cachefs_full(cli);
get_oplogger_ctx(cli, cli->oplogger, &oplogger_ctx);
get_cachefs_ctx(cli, &cachefs_ctx);
/* create open file */
file = malloc(sizeof(struct ethane_open_file) + strlen(path) + 1);
old_v = oplogger_snapshot_begin(cli->oplogger, &oplogger_ctx);
ret = oplogger_replay_read(cli->oplogger, &oplogger_ctx, path, false, 0);
if (unlikely(ret < 0)) {
of = ERR_PTR(ret);
goto out;
}
oplogger_snapshot_end(cli->oplogger, &oplogger_ctx, old_v);
ret = oplogger_replay_open(cli->oplogger, &oplogger_ctx, path, false, 0);
if (unlikely(ret < 0)) {
of = ERR_PTR(ret);
goto out;
}
/* perform the actual operation */
ret = cachefs_open(cli->cfs, &cachefs_ctx, path, file);
if (unlikely(ret < 0)) {
of = ERR_PTR(ret);
goto out;
}
if (!ret) {
of = (ethanefs_open_file_t *) file;
} else {
free(file);
of = ERR_PTR(ret);
}
out:
return of;
}
int ethanefs_close(ethanefs_cli_t *cli, ethanefs_open_file_t *file) {
free(file);
return 0;
}
long ethanefs_read(ethanefs_cli_t *cli, ethanefs_open_file_t *file, char *buf, size_t size, off_t off) {
oplogger_ctx_t oplogger_ctx;
cachefs_ctx_t cachefs_ctx;
cachefs_blk_t blk;
long read_size;
long old_v;
int ret;
/* FIXME: */
if (size != IO_SIZE || off % IO_SIZE != 0) {
pr_err("only support io size %d, and off(=%lu) must be multipler of it!", IO_SIZE, off);
abort();
}
pr_debug("use open file: path=%s dentry=%lx", file->open_file.full_path, file->open_file.remote_dentry_addr);
check_cachefs_full(cli);
get_oplogger_ctx(cli, cli->oplogger, &oplogger_ctx);
get_cachefs_ctx(cli, &cachefs_ctx);
old_v = oplogger_snapshot_begin(cli->oplogger, &oplogger_ctx);
ret = oplogger_replay_read(cli->oplogger, &oplogger_ctx, file->open_file.full_path, false, 0);
if (unlikely(ret < 0)) {
read_size = ret;
goto out;
}
oplogger_snapshot_end(cli->oplogger, &oplogger_ctx, old_v);
ret = oplogger_replay_read(cli->oplogger, &oplogger_ctx, file->open_file.full_path, false, 0);
if (unlikely(ret < 0)) {
read_size = ret;
goto out;
}
/* perform the actual operation */
read_size = cachefs_read(cli->cfs, &cachefs_ctx, file->open_file.full_path,
file->open_file.remote_dentry_addr, &blk, off, size);
if (unlikely(IS_ERR(read_size))) {
goto out;
}
/* read data */
ret = read_data(cli, buf, read_size, &blk);
if (unlikely(IS_ERR(ret))) {
read_size = ret;
goto out;
}
out:
return read_size;
}
long ethanefs_write(ethanefs_cli_t *cli, ethanefs_open_file_t *file, const char *buf, size_t size, off_t off) {
oplogger_ctx_t oplogger_ctx;
cachefs_ctx_t cachefs_ctx;
dmptr_t log, remote_addr;
cachefs_blk_t blk;
long write_size;
size_t ver;
int ret;
/* FIXME: */
if (size != IO_SIZE || off % IO_SIZE != 0) {
pr_err("only support io size %d, and off(=%lu) must be multipler of it!", IO_SIZE, off);
abort();
}
pr_debug("use open file: path=%s dentry=%lx", file->open_file.full_path, file->open_file.remote_dentry_addr);
check_cachefs_full(cli);
remote_addr = alloc_and_write_data(cli, size, buf);
blk.blk_remote_addr = remote_addr;
blk.size = size;
get_oplogger_ctx(cli, cli->oplogger, &oplogger_ctx);
get_cachefs_ctx(cli, &cachefs_ctx);
/* append log */
log = oplogger_write(cli->oplogger, &oplogger_ctx,
file->open_file.full_path, file->open_file.remote_dentry_addr, remote_addr, size, off);
if (unlikely(IS_ERR(log))) {
write_size = PTR_ERR(log);
goto out;
}
/* get current system version */
ver = oplogger_get_version(cli->oplogger, &oplogger_ctx);
/* replay until the newly appended log */
ret = oplogger_replay_write(cli->oplogger, &oplogger_ctx, file->open_file.full_path, true, 1);
if (unlikely(ret < 0)) {
write_size = ret;
goto out;
}
/* perform the actual operation */
write_size = cachefs_write(cli->cfs, &cachefs_ctx,
file->open_file.full_path, file->open_file.remote_dentry_addr, off, &blk, ver);
out:
return write_size;
}
int ethanefs_truncate(ethanefs_cli_t *cli, ethanefs_open_file_t *file, off_t size) {
oplogger_ctx_t oplogger_ctx;
cachefs_ctx_t cachefs_ctx;
dmptr_t log;
size_t ver;
int ret;
/* FIXME: */
if (size % IO_SIZE != 0) {
pr_err("only support io size %d, and size(=%lu) must be multipler of it!", IO_SIZE, size);
abort();
}
pr_debug("use open file: path=%s dentry=%lx", file->open_file.full_path, file->open_file.remote_dentry_addr);
check_cachefs_full(cli);
get_oplogger_ctx(cli, cli->oplogger, &oplogger_ctx);
get_cachefs_ctx(cli, &cachefs_ctx);
/* append log */
log = oplogger_truncate(cli->oplogger, &oplogger_ctx,
file->open_file.full_path, file->open_file.remote_dentry_addr, size);
if (unlikely(IS_ERR(log))) {
ret = PTR_ERR(log);
goto out;
}
/* get current system version */
ver = oplogger_get_version(cli->oplogger, &oplogger_ctx);
/* replay until the newly appended log */
ret = oplogger_replay_truncate(cli->oplogger, &oplogger_ctx, file->open_file.full_path, true, 1);
if (unlikely(ret < 0)) {
goto out;
}
/* perform the actual operation */
ret = cachefs_truncate(cli->cfs, &cachefs_ctx,
file->open_file.full_path, file->open_file.remote_dentry_addr, size, ver);
out:
return ret;
}
int ethanefs_chmod(ethanefs_cli_t *cli, const char *path, mode_t mode) {
uint64_t result = OP_RESULT_UNDETERMINED;
oplogger_ctx_t oplogger_ctx;
cachefs_ctx_t cachefs_ctx;
dmptr_t log;
size_t ver;
int ret;
path = get_path(cli, path);
check_cachefs_full(cli);
get_oplogger_ctx(cli, cli->oplogger, &oplogger_ctx);
get_cachefs_ctx(cli, &cachefs_ctx);
/* append log */
log = oplogger_chmod(cli->oplogger, &oplogger_ctx, path, mode);
if (unlikely(IS_ERR(log))) {
ret = PTR_ERR(log);
goto out;
}
/* get current system version */
ver = oplogger_get_version(cli->oplogger, &oplogger_ctx);
/* replay until the newly appended log */
ret = oplogger_replay_chmod(cli->oplogger, &oplogger_ctx, path, true, 1);
if (unlikely(ret < 0)) {
goto out;
}
/* perform the actual operation */
ret = cachefs_chmod(cli->cfs, &cachefs_ctx, path, &result, mode, ver);