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| | /*
* Copyright (C) 2012-2020 all contributors <cmogstored-public@yhbt.net>
* License: GPL-3.0+ <https://www.gnu.org/licenses/gpl-3.0.txt>
*/
#include "cmogstored.h"
#include "mgmt.h"
#include "iov_str.h"
#include "digest.h"
static char *
get_path(struct iovec *dst, struct mog_mgmt *mgmt, char *buf, bool sdup)
{
dst->iov_base = buf + mgmt->mark[0];
dst->iov_len = mgmt->mark[1] - mgmt->mark[0];
if (mog_valid_path(dst->iov_base, dst->iov_len)) {
char *path;
if (sdup) {
path = malloc(dst->iov_len + 1);
if (!path) {
struct iovec iov;
IOV_STR(&iov, "ERROR: out-of-memory\r\n");
mog_mgmt_writev(mgmt, &iov, 1);
return NULL;
}
memcpy(path, dst->iov_base, dst->iov_len);
} else {
path = dst->iov_base;
}
path[dst->iov_len] = '\0';
return path;
} else {
struct iovec iov;
IOV_STR(&iov, "ERROR: uri invalid (contains ..)\r\n");
mog_mgmt_writev(mgmt, &iov, 1);
return NULL;
}
}
/* starts the MD5 request */
void mog_mgmt_fn_digest(struct mog_fd *mfd, char *buf)
{
struct mog_mgmt *mgmt = &mfd->as.mgmt;
struct iovec iov[2];
char *path = get_path(iov, mgmt, buf, true);
if (!path) return;
TRACE(CMOGSTORED_MGMT_DIG_START(mfd->fd, mgmt->alg, path));
mgmt->forward = mog_file_open_read(mgmt->svc, path);
if (mgmt->forward) {
struct mog_file *file = &mgmt->forward->as.file;
mog_fadv_noreuse(mgmt->forward->fd, 0, 0 /* ALL */);
mog_fadv_sequential(mgmt->forward->fd, 0, 0 /* ALL */);
mog_digest_init(&file->digest, mgmt->alg);
file->pathlen = iov[0].iov_len;
file->path = path;
} else {
switch (mgmt->alg) {
case GC_MD5:
IOV_STR(&iov[1], " MD5=-1\r\n");
break;
case GC_SHA1:
IOV_STR(&iov[1], " SHA-1=-1\r\n");
break;
default: /* Ragel parser prevents this: */
die("BUG: unhandled algorithm: %d", mgmt->alg);
}
TRACE(CMOGSTORED_MGMT_DIG_DONE(mfd->fd, -1));
mog_mgmt_writev(mgmt, iov, 2);
free(path);
}
}
/* finishes the MD5 request */
#define CLEN(s) (sizeof(s)-1)
void mog_mgmt_fn_digest_err(struct mog_fd *mfd)
{
struct mog_mgmt *mgmt = &mfd->as.mgmt;
struct iovec iov[3];
struct mog_fd *file_mfd = mgmt->forward;
struct mog_file *file = &file_mfd->as.file;
long long offset = (long long)lseek(file_mfd->fd, 0, SEEK_CUR);
char buf[sizeof(" at 18446744073709551615 failed\r\n") - 1];
/* offset could be -1 here, but there ain't much we can do */
IOV_STR(iov, "ERR read ");
iov[1].iov_base = file->path;
iov[1].iov_len = file->pathlen;
iov[2].iov_base = buf;
iov[2].iov_len = snprintf(buf, sizeof(buf),
" at %lld failed\r\n", offset);
TRACE(CMOGSTORED_MGMT_DIG_DONE(mfd->fd, offset));
mog_mgmt_writev(mgmt, iov, 3);
}
/* output: "/$PATH MD5=hex\r\n" */
void mog_mgmt_fn_digest_emit(struct mog_fd *mfd)
{
struct mog_mgmt *mgmt = &mfd->as.mgmt;
struct iovec iov[2];
char buf[CLEN(" SHA-1=") + 40 + CLEN("\r\n")];
char *b = buf;
struct mog_fd *file_mfd = mgmt->forward;
struct mog_file *file = &file_mfd->as.file;
size_t len;
iov[0].iov_base = file->path;
iov[0].iov_len = file->pathlen;
/* ugh, clean this up... */
switch (mgmt->alg) {
case GC_MD5:
b = mempcpy(b, " MD5=", CLEN(" MD5="));
len = 32;
iov[1].iov_len = CLEN(" MD5=") + 32 + CLEN("\r\n");
break;
case GC_SHA1:
b = mempcpy(b, " SHA-1=", CLEN(" SHA-1="));
len = 40;
iov[1].iov_len = sizeof(buf);
break;
default:
die("BUG: unhandled algorithm: %d", mgmt->alg);
}
mog_digest_hex(&file->digest, b, len);
b[len] = '\r';
b[len + 1] = '\n';
iov[1].iov_base = buf;
TRACE(CMOGSTORED_MGMT_DIG_DONE(mfd->fd, 0));
mog_mgmt_writev(mgmt, iov, 2);
}
/*
* writes to mgmt fd:
* "URI $SIZE\r\n" on success
* "URI -1\r\n" on failure
* "ERROR: uri invalid (contains ..)\r\n" on invalid paths
*/
void mog_mgmt_fn_size(struct mog_mgmt *mgmt, char *buf)
{
struct stat sb;
struct iovec iov[2];
char tmp[sizeof(" 18446744073709551615\r\n") - 1];
char *path = get_path(iov, mgmt, buf, false);
if (!path) return;
if (mog_stat(mgmt->svc, path, &sb) == 0) {
long long size = (long long)sb.st_size;
iov[1].iov_base = tmp;
iov[1].iov_len = snprintf(tmp, sizeof(tmp), " %lld\r\n", size);
} else {
IOV_STR(&iov[1], " -1\r\n");
}
mog_mgmt_writev(mgmt, iov, 2);
}
void mog_mgmt_fn_blank(struct mog_mgmt *mgmt)
{
struct iovec iov;
IOV_STR(&iov, "\r\n");
mog_mgmt_writev(mgmt, &iov, 1);
}
void mog_mgmt_fn_unknown(struct mog_mgmt *mgmt, char *buf)
{
struct iovec iov[3];
IOV_STR(&iov[0], "ERROR: unknown command: ");
iov[1].iov_base = mgmt->mark[0] + buf;
iov[1].iov_len = mgmt->mark[1] - mgmt->mark[0];
IOV_STR(&iov[2], "\r\n");
mog_mgmt_writev(mgmt, iov, 3);
}
void mog_mgmt_fn_watch_err(struct mog_mgmt *mgmt)
{
struct iovec iov;
IOV_STR(&iov, "ERR iostat unavailable\r\n");
mog_mgmt_writev(mgmt, &iov, 1);
}
void mog_mgmt_fn_aio_threads(struct mog_mgmt *mgmt, char *buf)
{
char *end;
unsigned long long nr;
char *nptr = buf + mgmt->mark[0];
char *eor = nptr + mgmt->mark[1] - mgmt->mark[0];
assert((*eor == '\n' || *eor == '\r') && "missing end-of-record");
*eor = 0;
nr = strtoull(nptr, &end, 10);
assert(*end == 0 && "ragel misfed mog_mgmt_fn_set_aio_threads");
if (nr > 0 && nr <= (size_t)INT_MAX)
mog_svc_aio_threads_enqueue(mgmt->svc, (unsigned)nr);
mog_mgmt_fn_blank(mgmt);
}
|