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s3b_config.c
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/*
* s3backer - FUSE-based single file backing store via Amazon S3
*
* Copyright 2008-2011 Archie L. Cobbs <[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 2
* 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*
* $Id$
*/
#include "s3backer.h"
#include "block_cache.h"
#include "ec_protect.h"
#include "fuse_ops.h"
#include "http_io.h"
#include "test_io.h"
#include "s3b_config.h"
/****************************************************************************
* DEFINITIONS *
****************************************************************************/
/* S3 URL */
#define S3_DOMAIN "amazonaws.com"
/* S3 access permission strings */
#define S3_ACCESS_PRIVATE "private"
#define S3_ACCESS_PUBLIC_READ "public-read"
#define S3_ACCESS_PUBLIC_READ_WRITE "public-read-write"
#define S3_ACCESS_AUTHENTICATED_READ "authenticated-read"
/* Default values for some configuration parameters */
#define S3BACKER_DEFAULT_ACCESS_TYPE S3_ACCESS_PRIVATE
#define S3BACKER_DEFAULT_AUTH_VERSION AUTH_VERSION_AWS4
#define S3BACKER_DEFAULT_REGION "us-east-1"
#define S3BACKER_DEFAULT_PWD_FILE ".s3backer_passwd"
#define S3BACKER_DEFAULT_PREFIX ""
#define S3BACKER_DEFAULT_FILENAME "file"
#define S3BACKER_DEFAULT_STATS_FILENAME "stats"
#define S3BACKER_DEFAULT_BLOCKSIZE 4096
#define S3BACKER_DEFAULT_TIMEOUT 30 // 30s
#define S3BACKER_DEFAULT_FILE_MODE 0600
#define S3BACKER_DEFAULT_FILE_MODE_READ_ONLY 0400
#define S3BACKER_DEFAULT_INITIAL_RETRY_PAUSE 200 // 200ms
#define S3BACKER_DEFAULT_MAX_RETRY_PAUSE 30000 // 30s
#define S3BACKER_DEFAULT_MIN_WRITE_DELAY 500 // 500ms
#define S3BACKER_DEFAULT_MD5_CACHE_TIME 10000 // 10s
#define S3BACKER_DEFAULT_MD5_CACHE_SIZE 10000
#define S3BACKER_DEFAULT_BLOCK_CACHE_SIZE 1000
#define S3BACKER_DEFAULT_BLOCK_CACHE_NUM_THREADS 20
#define S3BACKER_DEFAULT_BLOCK_CACHE_WRITE_DELAY 250 // 250ms
#define S3BACKER_DEFAULT_BLOCK_CACHE_TIMEOUT 0
#define S3BACKER_DEFAULT_BLOCK_CACHE_MAX_DIRTY 0
#define S3BACKER_DEFAULT_READ_AHEAD 4
#define S3BACKER_DEFAULT_READ_AHEAD_TRIGGER 2
#define S3BACKER_DEFAULT_COMPRESSION Z_NO_COMPRESSION
#define S3BACKER_DEFAULT_ENCRYPTION "AES-128-CBC"
/* MacFUSE setting for kernel daemon timeout */
#ifdef __APPLE__
#ifndef FUSE_MAX_DAEMON_TIMEOUT
#define FUSE_MAX_DAEMON_TIMEOUT 600
#endif
#define s3bquote0(x) #x
#define s3bquote(x) s3bquote0(x)
#define FUSE_MAX_DAEMON_TIMEOUT_STRING s3bquote(FUSE_MAX_DAEMON_TIMEOUT)
#endif /* __APPLE__ */
/* Block counting info */
struct list_blocks {
u_int *bitmap;
int print_dots;
uintmax_t count;
};
#define BLOCKS_PER_DOT 0x100
/****************************************************************************
* FUNCTION DECLARATIONS *
****************************************************************************/
static print_stats_t s3b_config_print_stats;
static int parse_size_string(const char *s, uintmax_t *valp);
static void unparse_size_string(char *buf, size_t bmax, uintmax_t value);
static int search_access_for(const char *file, const char *accessId, char **idptr, char **pwptr);
static int handle_unknown_option(void *data, const char *arg, int key, struct fuse_args *outargs);
static void syslog_logger(int level, const char *fmt, ...) __attribute__ ((__format__ (__printf__, 2, 3)));
static void stderr_logger(int level, const char *fmt, ...) __attribute__ ((__format__ (__printf__, 2, 3)));
static int validate_config(void);
static void list_blocks_callback(void *arg, s3b_block_t block_num);
static void dump_config(void);
static void usage(void);
/****************************************************************************
* VARIABLE DEFINITIONS *
****************************************************************************/
/* Upload/download strings */
static const char *const upload_download_names[] = { "download", "upload" };
/* Valid S3 access values */
static const char *const s3_acls[] = {
S3_ACCESS_PRIVATE,
S3_ACCESS_PUBLIC_READ,
S3_ACCESS_PUBLIC_READ_WRITE,
S3_ACCESS_AUTHENTICATED_READ
};
/* Valid S3 authentication types */
static const char *const s3_auth_types[] = {
AUTH_VERSION_AWS2,
AUTH_VERSION_AWS4,
};
/* Configuration structure */
static char user_agent_buf[64];
static struct s3b_config config = {
/* HTTP config */
.http_io= {
.accessId= NULL,
.accessKey= NULL,
.baseURL= NULL,
.region= NULL,
.bucket= NULL,
.prefix= S3BACKER_DEFAULT_PREFIX,
.accessType= S3BACKER_DEFAULT_ACCESS_TYPE,
.authVersion= S3BACKER_DEFAULT_AUTH_VERSION,
.user_agent= user_agent_buf,
.compress= S3BACKER_DEFAULT_COMPRESSION,
.timeout= S3BACKER_DEFAULT_TIMEOUT,
.initial_retry_pause= S3BACKER_DEFAULT_INITIAL_RETRY_PAUSE,
.max_retry_pause= S3BACKER_DEFAULT_MAX_RETRY_PAUSE,
},
/* "Eventual consistency" protection config */
.ec_protect= {
.min_write_delay= S3BACKER_DEFAULT_MIN_WRITE_DELAY,
.cache_time= S3BACKER_DEFAULT_MD5_CACHE_TIME,
.cache_size= S3BACKER_DEFAULT_MD5_CACHE_SIZE,
},
/* Block cache config */
.block_cache= {
.cache_size= S3BACKER_DEFAULT_BLOCK_CACHE_SIZE,
.num_threads= S3BACKER_DEFAULT_BLOCK_CACHE_NUM_THREADS,
.write_delay= S3BACKER_DEFAULT_BLOCK_CACHE_WRITE_DELAY,
.max_dirty= S3BACKER_DEFAULT_BLOCK_CACHE_MAX_DIRTY,
.timeout= S3BACKER_DEFAULT_BLOCK_CACHE_TIMEOUT,
.read_ahead= S3BACKER_DEFAULT_READ_AHEAD,
.read_ahead_trigger= S3BACKER_DEFAULT_READ_AHEAD_TRIGGER,
},
/* FUSE operations config */
.fuse_ops= {
.filename= S3BACKER_DEFAULT_FILENAME,
.stats_filename= S3BACKER_DEFAULT_STATS_FILENAME,
.file_mode= -1, /* default depends on 'read_only' */
},
/* Common stuff */
.block_size= 0,
.file_size= 0,
.quiet= 0,
.erase= 0,
.no_auto_detect= 0,
.reset= 0,
.log= syslog_logger
};
/*
* Command line flags
*
* Note: each entry here is listed twice, so both version "--foo=X" and "-o foo=X" work.
* See http://code.google.com/p/s3backer/issues/detail?id=7
*/
static const struct fuse_opt option_list[] = {
{
.templ= "--accessFile=%s",
.offset= offsetof(struct s3b_config, accessFile),
},
{
.templ= "--accessId=%s",
.offset= offsetof(struct s3b_config, http_io.accessId),
},
{
.templ= "--accessKey=%s",
.offset= offsetof(struct s3b_config, http_io.accessKey),
},
{
.templ= "--accessType=%s",
.offset= offsetof(struct s3b_config, http_io.accessType),
},
{
.templ= "--accessEC2IAM=%s",
.offset= offsetof(struct s3b_config, http_io.ec2iam_role),
},
{
.templ= "--authVersion=%s",
.offset= offsetof(struct s3b_config, http_io.authVersion),
},
{
.templ= "--listBlocks",
.offset= offsetof(struct s3b_config, list_blocks),
.value= 1
},
{
.templ= "--baseURL=%s",
.offset= offsetof(struct s3b_config, http_io.baseURL),
},
{
.templ= "--region=%s",
.offset= offsetof(struct s3b_config, http_io.region),
},
{
.templ= "--blockCacheSize=%u",
.offset= offsetof(struct s3b_config, block_cache.cache_size),
},
{
.templ= "--blockCacheSync",
.offset= offsetof(struct s3b_config, block_cache.synchronous),
.value= 1
},
{
.templ= "--blockCacheThreads=%u",
.offset= offsetof(struct s3b_config, block_cache.num_threads),
},
{
.templ= "--blockCacheTimeout=%u",
.offset= offsetof(struct s3b_config, block_cache.timeout),
},
{
.templ= "--blockCacheWriteDelay=%u",
.offset= offsetof(struct s3b_config, block_cache.write_delay),
},
{
.templ= "--blockCacheMaxDirty=%u",
.offset= offsetof(struct s3b_config, block_cache.max_dirty),
},
{
.templ= "--readAhead=%u",
.offset= offsetof(struct s3b_config, block_cache.read_ahead),
},
{
.templ= "--readAheadTrigger=%u",
.offset= offsetof(struct s3b_config, block_cache.read_ahead_trigger),
},
{
.templ= "--blockCacheFile=%s",
.offset= offsetof(struct s3b_config, block_cache.cache_file),
},
{
.templ= "--blockCacheNoVerify",
.offset= offsetof(struct s3b_config, block_cache.no_verify),
.value= 1
},
{
.templ= "--blockSize=%s",
.offset= offsetof(struct s3b_config, block_size_str),
},
{
.templ= "--maxUploadSpeed=%s",
.offset= offsetof(struct s3b_config, max_speed_str[HTTP_UPLOAD]),
},
{
.templ= "--maxDownloadSpeed=%s",
.offset= offsetof(struct s3b_config, max_speed_str[HTTP_DOWNLOAD]),
},
{
.templ= "--md5CacheSize=%u",
.offset= offsetof(struct s3b_config, ec_protect.cache_size),
},
{
.templ= "--md5CacheTime=%u",
.offset= offsetof(struct s3b_config, ec_protect.cache_time),
},
{
.templ= "--debug",
.offset= offsetof(struct s3b_config, debug),
.value= 1
},
{
.templ= "--debug-http",
.offset= offsetof(struct s3b_config, http_io.debug_http),
.value= 1
},
{
.templ= "--quiet",
.offset= offsetof(struct s3b_config, quiet),
.value= 1
},
{
.templ= "--erase",
.offset= offsetof(struct s3b_config, erase),
.value= 1
},
{
.templ= "--reset-mounted-flag",
.offset= offsetof(struct s3b_config, reset),
.value= 1
},
{
.templ= "--vhost",
.offset= offsetof(struct s3b_config, http_io.vhost),
.value= 1
},
{
.templ= "--fileMode=%o",
.offset= offsetof(struct s3b_config, fuse_ops.file_mode),
},
{
.templ= "--filename=%s",
.offset= offsetof(struct s3b_config, fuse_ops.filename),
},
{
.templ= "--force",
.offset= offsetof(struct s3b_config, force),
.value= 1
},
{
.templ= "--noAutoDetect",
.offset= offsetof(struct s3b_config, no_auto_detect),
.value= 1
},
{
.templ= "--initialRetryPause=%u",
.offset= offsetof(struct s3b_config, http_io.initial_retry_pause),
},
{
.templ= "--maxRetryPause=%u",
.offset= offsetof(struct s3b_config, http_io.max_retry_pause),
},
{
.templ= "--minWriteDelay=%u",
.offset= offsetof(struct s3b_config, ec_protect.min_write_delay),
},
{
.templ= "--prefix=%s",
.offset= offsetof(struct s3b_config, http_io.prefix),
},
{
.templ= "--readOnly",
.offset= offsetof(struct s3b_config, fuse_ops.read_only),
.value= 1
},
{
.templ= "--size=%s",
.offset= offsetof(struct s3b_config, file_size_str),
},
{
.templ= "--statsFilename=%s",
.offset= offsetof(struct s3b_config, fuse_ops.stats_filename),
},
{
.templ= "--rrs",
.offset= offsetof(struct s3b_config, http_io.rrs),
.value= 1
},
{
.templ= "--ssl",
.offset= offsetof(struct s3b_config, ssl),
.value= 1
},
{
.templ= "--cacert=%s",
.offset= offsetof(struct s3b_config, http_io.cacert),
},
{
.templ= "--insecure",
.offset= offsetof(struct s3b_config, http_io.insecure),
.value= 1
},
{
.templ= "--compress",
.offset= offsetof(struct s3b_config, http_io.compress),
.value= Z_DEFAULT_COMPRESSION
},
{
.templ= "--compress=%d",
.offset= offsetof(struct s3b_config, http_io.compress),
},
{
.templ= "--encrypt",
.offset= offsetof(struct s3b_config, encrypt),
.value= 1
},
{
.templ= "--encrypt=%s",
.offset= offsetof(struct s3b_config, http_io.encryption),
},
{
.templ= "--keyLength=%u",
.offset= offsetof(struct s3b_config, http_io.key_length),
},
{
.templ= "--password=%s",
.offset= offsetof(struct s3b_config, http_io.password),
},
{
.templ= "--passwordFile=%s",
.offset= offsetof(struct s3b_config, password_file),
},
{
.templ= "--test",
.offset= offsetof(struct s3b_config, test),
.value= 1
},
{
.templ= "--timeout=%u",
.offset= offsetof(struct s3b_config, http_io.timeout),
},
{
.templ= "--directIO",
.offset= offsetof(struct s3b_config, fuse_ops.direct_io),
.value= 1
},
};
/* Default flags we send to FUSE */
static const char *const s3backer_fuse_defaults[] = {
"-okernel_cache",
"-oallow_other",
"-ouse_ino",
"-omax_readahead=0",
"-osubtype=s3backer",
"-oentry_timeout=31536000",
"-onegative_timeout=31536000",
"-oattr_timeout=0", // because statistics file length changes
"-odefault_permissions",
#ifndef __FreeBSD__
"-onodev",
#endif
"-onosuid",
#ifdef __APPLE__
"-odaemon_timeout=" FUSE_MAX_DAEMON_TIMEOUT_STRING,
#endif
/* "-ointr", */
};
/* Size suffixes */
struct size_suffix {
const char *suffix;
int bits;
};
static const struct size_suffix size_suffixes[] = {
{
.suffix= "k",
.bits= 10
},
{
.suffix= "m",
.bits= 20
},
{
.suffix= "g",
.bits= 30
},
{
.suffix= "t",
.bits= 40
},
{
.suffix= "p",
.bits= 50
},
{
.suffix= "e",
.bits= 60
},
{
.suffix= "z",
.bits= 70
},
{
.suffix= "y",
.bits= 80
},
};
/* s3backer_store layers */
struct s3backer_store *block_cache_store;
struct s3backer_store *ec_protect_store;
struct s3backer_store *http_io_store;
struct s3backer_store *test_io_store;
/****************************************************************************
* PUBLIC FUNCTION DEFINITIONS *
****************************************************************************/
struct s3b_config *
s3backer_get_config(int argc, char **argv)
{
const int num_options = sizeof(option_list) / sizeof(*option_list);
struct fuse_opt dup_option_list[2 * sizeof(option_list) + 1];
char buf[1024];
int i;
/* Remember user creds */
config.fuse_ops.uid = getuid();
config.fuse_ops.gid = getgid();
/* Set user-agent */
snprintf(user_agent_buf, sizeof(user_agent_buf), "%s/%s/r%d", PACKAGE, VERSION, s3backer_svnrev);
/* Copy passed args */
memset(&config.fuse_args, 0, sizeof(config.fuse_args));
for (i = 0; i < argc; i++) {
if (fuse_opt_insert_arg(&config.fuse_args, i, argv[i]) != 0)
err(1, "fuse_opt_insert_arg");
}
/* Insert our default FUSE options */
for (i = 0; i < sizeof(s3backer_fuse_defaults) / sizeof(*s3backer_fuse_defaults); i++) {
if (fuse_opt_insert_arg(&config.fuse_args, i + 1, s3backer_fuse_defaults[i]) != 0)
err(1, "fuse_opt_insert_arg");
}
/* Create the equivalent fstab options (without the "--") for each option in the option list */
memcpy(dup_option_list, option_list, sizeof(option_list));
memcpy(dup_option_list + num_options, option_list, sizeof(option_list));
for (i = num_options; i < 2 * num_options; i++)
dup_option_list[i].templ += 2;
dup_option_list[2 * num_options].templ = NULL;
/* Parse command line flags */
if (fuse_opt_parse(&config.fuse_args, &config, dup_option_list, handle_unknown_option) != 0)
return NULL;
/* Validate configuration */
if (validate_config() != 0)
return NULL;
/* Set fsname based on configuration */
snprintf(buf, sizeof(buf), "-ofsname=%s", config.description);
if (fuse_opt_insert_arg(&config.fuse_args, 1, buf) != 0)
err(1, "fuse_opt_insert_arg");
/* Set up fuse_ops callbacks */
config.fuse_ops.print_stats = s3b_config_print_stats;
config.fuse_ops.s3bconf = &config;
/* Debug */
if (config.debug)
dump_config();
/* Done */
return &config;
}
/*
* Create the s3backer_store used at runtime. This method is invoked by fuse_op_init().
*/
struct s3backer_store *
s3backer_create_store(struct s3b_config *conf)
{
struct s3backer_store *store;
int mounted;
int r;
/* Sanity check */
if (http_io_store != NULL || test_io_store != NULL) {
errno = EINVAL;
return NULL;
}
/* Create HTTP (or test) layer */
if (conf->test) {
if ((test_io_store = test_io_create(&conf->http_io)) == NULL)
return NULL;
store = test_io_store;
} else {
if ((http_io_store = http_io_create(&conf->http_io)) == NULL)
return NULL;
store = http_io_store;
}
/* Create eventual consistency protection layer (if desired) */
if (conf->ec_protect.cache_size > 0) {
if ((ec_protect_store = ec_protect_create(&conf->ec_protect, store)) == NULL)
goto fail_with_errno;
store = ec_protect_store;
}
/* Create block cache layer (if desired) */
if (conf->block_cache.cache_size > 0) {
if ((block_cache_store = block_cache_create(&conf->block_cache, store)) == NULL)
goto fail_with_errno;
store = block_cache_store;
}
/* Set mounted flag and check previous value one last time */
r = (*store->set_mounted)(store, &mounted, conf->fuse_ops.read_only ? -1 : 1);
if (r != 0) {
(*conf->log)(LOG_ERR, "error reading mounted flag on %s: %s", conf->description, strerror(r));
goto fail;
}
if (mounted) {
if (!conf->force) {
(*conf->log)(LOG_ERR, "%s appears to be mounted by another s3backer process", config.description);
r = EBUSY;
goto fail;
}
}
/* Done */
return store;
fail_with_errno:
r = errno;
fail:
if (store != NULL)
(*store->destroy)(store);
block_cache_store = NULL;
ec_protect_store = NULL;
http_io_store = NULL;
test_io_store = NULL;
errno = r;
return NULL;
}
/****************************************************************************
* INTERNAL FUNCTION DEFINITIONS *
****************************************************************************/
static void
s3b_config_print_stats(void *prarg, printer_t *printer)
{
struct http_io_stats http_io_stats;
struct ec_protect_stats ec_protect_stats;
struct block_cache_stats block_cache_stats;
double curl_reuse_ratio = 0.0;
u_int total_oom = 0;
u_int total_curls;
/* Get HTTP stats */
if (http_io_store != NULL)
http_io_get_stats(http_io_store, &http_io_stats);
/* Get EC protection stats */
if (ec_protect_store != NULL)
ec_protect_get_stats(ec_protect_store, &ec_protect_stats);
/* Get block cache stats */
if (block_cache_store != NULL)
block_cache_get_stats(block_cache_store, &block_cache_stats);
/* Print stats in human-readable form */
if (http_io_store != NULL) {
(*printer)(prarg, "%-28s %u\n", "http_normal_blocks_read", http_io_stats.normal_blocks_read);
(*printer)(prarg, "%-28s %u\n", "http_normal_blocks_written", http_io_stats.normal_blocks_written);
(*printer)(prarg, "%-28s %u\n", "http_zero_blocks_read", http_io_stats.zero_blocks_read);
(*printer)(prarg, "%-28s %u\n", "http_zero_blocks_written", http_io_stats.zero_blocks_written);
if (config.list_blocks) {
(*printer)(prarg, "%-28s %u\n", "http_empty_blocks_read", http_io_stats.empty_blocks_read);
(*printer)(prarg, "%-28s %u\n", "http_empty_blocks_written", http_io_stats.empty_blocks_written);
}
(*printer)(prarg, "%-28s %u\n", "http_gets", http_io_stats.http_gets.count);
(*printer)(prarg, "%-28s %u\n", "http_puts", http_io_stats.http_puts.count);
(*printer)(prarg, "%-28s %u\n", "http_deletes", http_io_stats.http_deletes.count);
(*printer)(prarg, "%-28s %.3f sec\n", "http_avg_get_time", http_io_stats.http_gets.count > 0 ?
http_io_stats.http_gets.time / http_io_stats.http_gets.count : 0.0);
(*printer)(prarg, "%-28s %.3f sec\n", "http_avg_put_time", http_io_stats.http_puts.count > 0 ?
http_io_stats.http_puts.time / http_io_stats.http_puts.count : 0.0);
(*printer)(prarg, "%-28s %.3f sec\n", "http_avg_delete_time", http_io_stats.http_deletes.count > 0 ?
http_io_stats.http_deletes.time / http_io_stats.http_deletes.count : 0.0);
(*printer)(prarg, "%-28s %u\n", "http_unauthorized", http_io_stats.http_unauthorized);
(*printer)(prarg, "%-28s %u\n", "http_forbidden", http_io_stats.http_forbidden);
(*printer)(prarg, "%-28s %u\n", "http_stale", http_io_stats.http_stale);
(*printer)(prarg, "%-28s %u\n", "http_verified", http_io_stats.http_verified);
(*printer)(prarg, "%-28s %u\n", "http_mismatch", http_io_stats.http_mismatch);
(*printer)(prarg, "%-28s %u\n", "http_5xx_error", http_io_stats.http_5xx_error);
(*printer)(prarg, "%-28s %u\n", "http_4xx_error", http_io_stats.http_4xx_error);
(*printer)(prarg, "%-28s %u\n", "http_other_error", http_io_stats.http_other_error);
(*printer)(prarg, "%-28s %u\n", "http_canceled_writes", http_io_stats.http_canceled_writes);
(*printer)(prarg, "%-28s %u\n", "http_num_retries", http_io_stats.num_retries);
(*printer)(prarg, "%-28s %ju.%03u sec\n", "http_total_retry_delay",
(uintmax_t)(http_io_stats.retry_delay / 1000), (u_int)(http_io_stats.retry_delay % 1000));
total_curls = http_io_stats.curl_handles_created + http_io_stats.curl_handles_reused;
if (total_curls > 0)
curl_reuse_ratio = (double)http_io_stats.curl_handles_reused / (double)total_curls;
(*printer)(prarg, "%-28s %.4f\n", "curl_handle_reuse_ratio", curl_reuse_ratio);
(*printer)(prarg, "%-28s %u\n", "curl_timeouts", http_io_stats.curl_timeouts);
(*printer)(prarg, "%-28s %u\n", "curl_connect_failed", http_io_stats.curl_connect_failed);
(*printer)(prarg, "%-28s %u\n", "curl_host_unknown", http_io_stats.curl_host_unknown);
(*printer)(prarg, "%-28s %u\n", "curl_out_of_memory", http_io_stats.curl_out_of_memory);
(*printer)(prarg, "%-28s %u\n", "curl_other_error", http_io_stats.curl_other_error);
total_oom += http_io_stats.out_of_memory_errors;
}
if (block_cache_store != NULL) {
double read_hit_ratio = 0.0;
double write_hit_ratio = 0.0;
u_int total_reads;
u_int total_writes;
total_reads = block_cache_stats.read_hits + block_cache_stats.read_misses;
if (total_reads != 0)
read_hit_ratio = (double)block_cache_stats.read_hits / (double)total_reads;
total_writes = block_cache_stats.write_hits + block_cache_stats.write_misses;
if (total_writes != 0)
write_hit_ratio = (double)block_cache_stats.write_hits / (double)total_writes;
(*printer)(prarg, "%-28s %u blocks\n", "block_cache_current_size", block_cache_stats.current_size);
(*printer)(prarg, "%-28s %u blocks\n", "block_cache_initial_size", block_cache_stats.initial_size);
(*printer)(prarg, "%-28s %.4f\n", "block_cache_dirty_ratio", block_cache_stats.dirty_ratio);
(*printer)(prarg, "%-28s %u\n", "block_cache_read_hits", block_cache_stats.read_hits);
(*printer)(prarg, "%-28s %u\n", "block_cache_read_misses", block_cache_stats.read_misses);
(*printer)(prarg, "%-28s %.4f\n", "block_cache_read_hit_ratio", read_hit_ratio);
(*printer)(prarg, "%-28s %u\n", "block_cache_write_hits", block_cache_stats.write_hits);
(*printer)(prarg, "%-28s %u\n", "block_cache_write_misses", block_cache_stats.write_misses);
(*printer)(prarg, "%-28s %.4f\n", "block_cache_write_hit_ratio", write_hit_ratio);
(*printer)(prarg, "%-28s %u\n", "block_cache_verified", block_cache_stats.verified);
(*printer)(prarg, "%-28s %u\n", "block_cache_mismatch", block_cache_stats.mismatch);
total_oom += block_cache_stats.out_of_memory_errors;
}
if (ec_protect_store != NULL) {
(*printer)(prarg, "%-28s %u blocks\n", "md5_cache_current_size", ec_protect_stats.current_cache_size);
(*printer)(prarg, "%-28s %u\n", "md5_cache_data_hits", ec_protect_stats.cache_data_hits);
(*printer)(prarg, "%-28s %ju.%03u sec\n", "md5_cache_full_delays",
(uintmax_t)(ec_protect_stats.cache_full_delay / 1000), (u_int)(ec_protect_stats.cache_full_delay % 1000));
(*printer)(prarg, "%-28s %ju.%03u sec\n", "md5_cache_write_delays",
(uintmax_t)(ec_protect_stats.repeated_write_delay / 1000), (u_int)(ec_protect_stats.repeated_write_delay % 1000));
total_oom += ec_protect_stats.out_of_memory_errors;
}
(*printer)(prarg, "%-28s %u\n", "out_of_memory_errors", total_oom);
}
static int
parse_size_string(const char *s, uintmax_t *valp)
{
char suffix[3] = { '\0' };
int nconv;
nconv = sscanf(s, "%ju%2s", valp, suffix);
if (nconv < 1)
return -1;
if (nconv >= 2) {
int found = 0;
int i;
for (i = 0; i < sizeof(size_suffixes) / sizeof(*size_suffixes); i++) {
const struct size_suffix *const ss = &size_suffixes[i];
if (ss->bits >= sizeof(off_t) * 8)
break;
if (strcasecmp(suffix, ss->suffix) == 0) {
*valp <<= ss->bits;
found = 1;
break;
}
}
if (!found)
return -1;
}
return 0;
}
static void
unparse_size_string(char *buf, size_t bmax, uintmax_t value)
{
uintmax_t unit;
int i;
if (value == 0) {
snprintf(buf, bmax, "0");
return;
}
for (i = sizeof(size_suffixes) / sizeof(*size_suffixes); i-- > 0; ) {
const struct size_suffix *const ss = &size_suffixes[i];
if (ss->bits >= sizeof(off_t) * 8)
continue;
unit = (uintmax_t)1 << ss->bits;
if (value % unit == 0) {
snprintf(buf, bmax, "%ju%s", value / unit, ss->suffix);
return;
}
}
snprintf(buf, bmax, "%ju", value);
}
/**
* Handle command-line flag.
*/
static int
handle_unknown_option(void *data, const char *arg, int key, struct fuse_args *outargs)
{
/* Check options */
if (key == FUSE_OPT_KEY_OPT) {
/* Debug flags */
if (strcmp(arg, "-d") == 0)
config.debug = 1;
if (strcmp(arg, "-d") == 0 || strcmp(arg, "-f") == 0)
config.log = stderr_logger;
/* Version */
if (strcmp(arg, "--version") == 0 || strcmp(arg, "-v") == 0) {
fprintf(stderr, "%s version %s (r%d)\n", PACKAGE, VERSION, s3backer_svnrev);
fprintf(stderr, "Copyright (C) 2008-2011 Archie L. Cobbs.\n");
fprintf(stderr, "This is free software; see the source for copying conditions. There is NO\n");
fprintf(stderr, "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n");
exit(0);
}
/* Help */
if (strcmp(arg, "--help") == 0 || strcmp(arg, "-h") == 0 || strcmp(arg, "-?") == 0) {
usage();
exit(0);
}
/* Unknown; pass it through to fuse_main() */
return 1;
}
/* Get bucket parameter */
if (config.http_io.bucket == NULL) {
if ((config.http_io.bucket = strdup(arg)) == NULL)
err(1, "strdup");
return 0;
}
/* Copy mount point */
if (config.mount == NULL) {
if ((config.mount = strdup(arg)) == NULL)
err(1, "strdup");
return 1;
}
/* Pass subsequent paramters on to fuse_main() */
return 1;
}
static int
search_access_for(const char *file, const char *accessId, char **idptr, char **pwptr)
{
char buf[1024];
FILE *fp;
if (idptr != NULL)
*idptr = NULL;
if (pwptr != NULL)
*pwptr = NULL;
if ((fp = fopen(file, "r")) == NULL)
return 0;
while (fgets(buf, sizeof(buf), fp) != NULL) {
char *colon;
if (*buf == '#' || *buf == '\0' || isspace(*buf) || (colon = strchr(buf, ':')) == NULL)
continue;
while (*buf != '\0' && isspace(buf[strlen(buf) - 1]))
buf[strlen(buf) - 1] = '\0';
*colon = '\0';
if (accessId != NULL && strcmp(buf, accessId) != 0)
continue;
if (idptr != NULL && (*idptr = strdup(buf)) == NULL)
err(1, "strdup");
if (pwptr != NULL && (*pwptr = strdup(colon + 1)) == NULL)
err(1, "strdup");
fclose(fp);
return 1;
}
fclose(fp);
return 0;
}
static int
validate_config(void)
{
struct s3backer_store *s3b;
const int customBaseURL = config.http_io.baseURL != NULL;
const int customRegion = config.http_io.region != NULL;
off_t auto_file_size;
u_int auto_block_size;
uintmax_t value;
const char *s;
char blockSizeBuf[64];
char fileSizeBuf[64];
struct stat sb;
char urlbuf[512];
int i;
int r;
/* Default to $HOME/.s3backer for accessFile */
if (config.http_io.ec2iam_role == NULL && config.accessFile == NULL) {
const char *home = getenv("HOME");
char buf[PATH_MAX];
if (home != NULL) {
snprintf(buf, sizeof(buf), "%s/%s", home, S3BACKER_DEFAULT_PWD_FILE);
if ((config.accessFile = strdup(buf)) == NULL)
err(1, "strdup");
}
}
/* Auto-set file mode in read_only if not explicitly set */
if (config.fuse_ops.file_mode == -1) {
config.fuse_ops.file_mode = config.fuse_ops.read_only ?
S3BACKER_DEFAULT_FILE_MODE_READ_ONLY : S3BACKER_DEFAULT_FILE_MODE;
}
/* If no accessId specified, default to first in accessFile */
if (config.http_io.accessId == NULL && config.accessFile != NULL)
search_access_for(config.accessFile, NULL, &config.http_io.accessId, NULL);
if (config.http_io.accessId != NULL && *config.http_io.accessId == '\0')
config.http_io.accessId = NULL;
/* If no accessId, only read operations will succeed */
if (config.http_io.accessId == NULL && !config.fuse_ops.read_only && !customBaseURL && config.http_io.ec2iam_role == NULL) {
warnx("warning: no `accessId' specified; only read operations will succeed");
warnx("you can eliminate this warning by providing the `--readOnly' flag");
}
/* Find key in file if not specified explicitly */
if (config.http_io.accessId == NULL && config.http_io.accessKey != NULL) {
warnx("an `accessKey' was specified but no `accessId' was specified");
return -1;
}
if (config.http_io.accessId != NULL) {
if (config.http_io.accessKey == NULL && config.accessFile != NULL)
search_access_for(config.accessFile, config.http_io.accessId, NULL, &config.http_io.accessKey);
if (config.http_io.accessKey == NULL) {
warnx("no `accessKey' specified");
return -1;
}
}
/* Check for conflict between explicit accessId and EC2 IAM role */
if (config.http_io.accessId != NULL && config.http_io.ec2iam_role != NULL) {
warnx("an `accessKey' must not be specified when an `accessEC2IAM' role is specified");
return -1;
}
/* Check auth version */
for (i = 0; i < sizeof(s3_auth_types) / sizeof(*s3_auth_types); i++) {
if (strcmp(config.http_io.authVersion, s3_auth_types[i]) == 0)
break;
}
if (i == sizeof(s3_auth_types) / sizeof(*s3_auth_types)) {
warnx("illegal authentication version `%s'", config.http_io.authVersion);
return -1;
}
/* Check bucket/testdir */
if (!config.test) {
if (config.http_io.bucket == NULL) {
warnx("no S3 bucket specified");
return -1;
}
if (*config.http_io.bucket == '\0' || *config.http_io.bucket == '/' || strchr(config.http_io.bucket, '/') != 0) {
warnx("invalid S3 bucket `%s'", config.http_io.bucket);
return -1;
}
} else {
if (config.http_io.bucket == NULL) {
warnx("no test directory specified");
return -1;
}
if (stat(config.http_io.bucket, &sb) == -1) {
warn("%s", config.http_io.bucket);
return -1;
}
if (!S_ISDIR(sb.st_mode)) {
errno = ENOTDIR;
warn("%s", config.http_io.bucket);
return -1;
}
}
/* Set default or custom region */
if (config.http_io.region == NULL)
config.http_io.region = S3BACKER_DEFAULT_REGION;
if (customRegion)
config.http_io.vhost = 1;
/* Set default base URL */
if (config.http_io.baseURL == NULL) {
if (customRegion && strcmp(config.http_io.region, S3BACKER_DEFAULT_REGION) != 0)
snprintf(urlbuf, sizeof(urlbuf), "http%s://s3-%s.%s/", config.ssl ? "s" : "", config.http_io.region, S3_DOMAIN);
else
snprintf(urlbuf, sizeof(urlbuf), "http%s://s3.%s/", config.ssl ? "s" : "", S3_DOMAIN);
config.http_io.baseURL = urlbuf;
}
/* Check base URL */
s = NULL;
if (strncmp(config.http_io.baseURL, "http://", 7) == 0)
s = config.http_io.baseURL + 7;