* or might be blanked out
* <spc><spc><spc><spc>....
*
- * site.name_duct.lock lock preventing multiple ducts
- * holder of this lock is "duct"
* F site.name main feed file
* opened/created, then written, by innd
* read by duct
* unlinked by duct
* tokens blanked out by duct when processed
- * D site.name_duct temporary feed file during flush (or crash)
+ * site.name_lock lock preventing multiple ducts
+ * to hold lock must open,F_SETLK[W]
+ * and then stat to check that locked file
+ * still has name site.name_lock
+ * holder of this lock is "duct"
+ * (only) lockholder may remove the lockfile
+ * D site.name_flushing temporary feed file during flush (or crash)
* hardlink created by duct
* unlinked by duct
- * site.name_duct.defer 431'd articles, still being written,
+ * site.name_defer 431'd articles, still being written,
* created, written, used by duct
- * site.name_backlog.lock lock taken out by innxmit wrapper
- * holder and its child are "xmit"
- * site.name_backlog_<date>.<inum>
- * 431'd articles, ready for innxmit
+ *
+ * site.name_backlog.<date>.<inum>
+ * 431'd articles, ready for innxmit or duct
* created (link/mv) by duct
- * read by xmit
- * unlinked by xmit
- * site.name_backlog_<letters> eg
- * site.name_backlog_manual
+ * site.name_backlog<anything-else> (where <anything-else> does not
+ * contain '#' or '~') eg
+ * site.name_backlog.manual
* anything the sysadmin likes (eg, feed files
* from old feeds to be merged into this one)
* created (link/mv) by admin
- * read by xmit
- * unlinked by xmit
-
-
-
-
- BLATHER ABOUT NOT USING INNXMIT
-
- scan for backlog files
- take "old enough" backlog files one at a time and reprocess them
- so need another input file - the current backlog file
- inhibit scanning for backlog files only when
- - last file not "old enough"
- - no backlog files found and we haven't made one
-
- also we have to start a new backlog file every (some interval)
-
- TODO for backlog file inputs
- - all code to search for and open these files
- - write proper algorithm comment
-
+ * may be symlinks (in which case links
+ * may be written through, but only links
+ * will be removed.
+ *
+ * It is safe to remove backlog files manually,
+ * if it's desired to throw away the backlog.
+ *
+ * Backlog files are also processed by innduct. We find the oldest
+ * backlog file which is at least a certain amount old, and feed it
+ * back into our processing. When every article in it has been read
+ * and processed, we unlink it and look for another backlog file.
+ *
+ * If we don't have a backlog file that we're reading, we close the
+ * defer file that we're writing and make it into a backlog file at
+ * the first convenient opportunity.
-
OVERALL STATES:
START
|
- check D, F
- |
- <--------------------------------------'|
- Nothing F, D both ENOENT |
- F: ENOENT |
- D: ENOENT |
- duct: not not reading anything |
- | |
- |`---------------------. |
- | | duct times out waiting for F |
- V innd creates F | duct exits |
- | V |
- Noduct GO TO Dropped |
- F: innd writing |
- D: ENOENT |
- duct: not running or not reading anything |
- | |
- | |
- ,-->--+ <---------------------------------'|
- | | duct opens F F exists |
- | | D ENOENT |
+ ,-->--. check F, D
+ | | |
+ | | |
+ | | <----------------<---------------------------------'|
+ | | F exists |
+ | | D ENOENT |
+ | | duct opens F |
| V |
| Normal |
| F: innd writing, duct reading |
| F == D: innd writing, duct reading both exist |
^ | |
| | duct unlinks F |
- | V |
- | Moved <----+------------<--'|
- | F: ENOENT | F ENOENT |
- | D: innd writing, duct reading | D exists |
- | | | |
- | | duct requests flush of feed | |
- | | (others can too, harmlessly) | |
- | V | |
- | Flushing | |
- | F: ENOENT | |
- | D: innd flushing, duct reading | |
- | | | |
- | | inndcomm flush fails | |
- | |`-------------------------->---------' |
- | | |
+ | | <-----------<-------------<--'|
+ | | open D F ENOENT |
+ | | if exists |
+ | | |
+ | V <---------------------. |
+ | Moved | |
+ | F: ENOENT | |
+ | D: innd writing, duct reading; or ENOENT | |
+ | | | |
+ | | duct requests flush of feed | |
+ | | (others can too, harmlessly) | |
+ | V | |
+ | Flushing | |
+ | F: ENOENT | |
+ | D: innd flushing, duct; or ENOENT | |
+ | | | |
+ | | inndcomm flush fails | |
+ | |`-------------------------->------------------' |
+ | | |
| | inndcomm reports no such site |
| |`---------------------------------------------------- | -.
- | | | |
+ | | | |
| | innd finishes writing D, creates F | |
| | inndcomm reports flush successful | |
| | | |
| V | |
| Separated <----------------' |
| F: innd writing F!=D /
- | D: duct reading both exist /
+ | D: duct reading; or ENOENT both exist /
| | /
| | duct gets to the end of D /
| | duct opens F too /
static int inndcomm_flush_timeout=100, quiet_if_locked=0;
static const char *remote_host;
static int reconnect_delay_periods, flushfail_retry_periods, open_wait_periods;
+static int backlog_retry_minperiods, backlog_spontaneous_rescan_periods;
static const char *inndconffile;
static double accept_proportion;
void *readable_callback_user;
int fd;
- const char *path; /* ptr copy of path_<foo> or feedfile */
struct Filemon_Perfile *filemon;
oop_read *rd;
off_t offset;
Counts counts;
+ char path[];
} InputFile;
+#define SMS_LIST(X) \
+ X(WAITING) \
+ X(NORMAL) \
+ X(FLUSHING) \
+ X(FLUSHFAIL) \
+ X(SEPARATED) \
+ X(DROPPING)
+
typedef enum {
- sm_WAITING,
- sm_NORMAL,
- sm_FLUSHING,
- sm_FLUSHFAIL,
- sm_SEPARATED,
- sm_DROPPING,
+#define SMS_DEF_ENUM(s) sm_##s,
+ SMS_LIST(SMS_DEF_ENUM)
} StateMachineState;
+static const char *sms_names[]= {
+#define SMS_DEF_NAME(s) #s ,
+ SMS_LIST(SMS_DEF_NAME)
+ 0
+};
+
struct Conn {
ISNODE(Conn);
int fd, max_queue, stream;
/*----- operational variables -----*/
-static int since_connect_attempt;
static int nconns;
static LIST(Conn) idle, working, full;
static LIST(Article) *queue;
-static char *path_ductlock, *path_duct, *path_ductdefer;
+static char *path_lock, *path_flushing, *path_defer;
#define SMS(newstate, periods, why) \
(statemc_setstate(sm_##newstate,(periods),#newstate,(why)))
static StateMachineState sms;
static FILE *defer;
-static InputFile *main_input_file, *old_input_file, *backlog_input_file;
+static InputFile *main_input_file, *flushing_input_file, *backlog_input_file;
static int sm_period_counter;
return status;
}
+static void xunlink(const char *path, const char *what) {
+ int r= unlink(path);
+ if (r) sysdie("can't unlink %s %s", path, what);
+}
+
+static void check_isreg(const struct stat *stab, const char *path,
+ const char *what) {
+ if (!S_ISREG(stab->st_mode))
+ die("%s %s not a plain file (mode 0%lo)",
+ what, path, (unsigned long)stab->st_mode);
+}
+
+static void xfstat(int fd, struct stat *stab_r, const char *what) {
+ int r= fstab(path, stab);
+ if (r) sysdie("could not fstat %s %s", what, path);
+}
+
+static void xfstat_isreg(int fd, struct stat *stab_r, const char *what) {
+ xfstat(fd, stab_r, what);
+ check_isreg(stab, path, what);
+}
+
+static void xlstat_isreg(const char *path, struct stat *stab,
+ int *enoent_r /* 0 means ENOENT is fatal */
+ const char *what) {
+ int r= lstat(path, stab);
+ if (r) {
+ if (errno==ENOENT && enoent_r) { *enoent_r=1; return; }
+ sysdie("could not lstat %s %s", what, path);
+ }
+ if (enoent_r) *enoent_r= 0;
+ check_isreg(stab, path, what);
+}
+
+static int samefile(const struct stat *a, const struct stat *b) {
+ assert(S_ISREG(a->st_mode));
+ assert(S_ISREG(b->st_mode));
+ return (a->st_ino == b->st_ino &&
+ a->st_dev == b->st_dev);
+}
+
/*========== logging ==========*/
static void logcore(int sysloglevel, const char *fmt, ...)
logwrap(notice, "", LOG_NOTICE, -1, 0);
logwrap(info, " info", LOG_INFO, -1, 0);
+logwrap(debug, " debug", LOG_DEBUG, -1, 0);
/*========== making new connections ==========*/
/*========== overall control of article flow ==========*/
static void check_master_queue(void) {
- try reading current feed file;
-
if (!queue.count)
return;
OOP_RD_SHORTREC_FORBID
};
+static void *peer_rd_err(oop_source *lp, oop_read *oread, oop_event ev,
+ const char *errmsg, int errnoval,
+ const char *data, size_t recsz, void *conn_v) {
+ Conn *conn= conn_v;
+ connfail(conn, "error receiving from peer: %s", errmsg);
+ return OOP_CONTINUE;
+}
+
static Article *article_reply_check(Connection *conn, const char *response,
int code_indicates_streaming,
const char *sanitised_response) {
static void update_nocheck(int accepted) {
accept_proportion *= accept_decay;
accept_proportion += accepted;
- nocheck= accept_proportion >= nocheck_thresh;
- if (nocheck && !nocheck_reported) {
+ int new_nocheck= accept_proportion >= nocheck_thresh;
+ if (new_nocheck && !nocheck_reported) {
notice("entering nocheck mode for the first time");
nocheck_reported= 1;
+ } else if (new_nocheck != nockech) {
+ debug("nocheck mode %s", new_nocheck ? "start" : "stop");
}
+ nocheck= new_nocheck;
}
static void article_done(Connection *conn, Article *art, int whichcount) {
free(art);
}
-static void *peer_rd_err(oop_source *lp, oop_read *oread, oop_event ev,
- const char *errmsg, int errnoval,
- const char *data, size_t recsz, void *conn_v) {
- Conn *conn= conn_v;
- connfail(conn, "error receiving from peer: %s", errmsg);
- return OOP_CONTINUE;
-}
-
static void *peer_rd_ok(oop_source *lp, oop_read *oread, oop_event ev,
const char *errmsg, int errnoval,
const char *data, size_t recsz, void *conn_v) {
code_streaming= 1;
case 436: /* IHAVE says try later */
GET_ARTICLE;
+ open_defer();
if (fprintf(defer, "%s %s\n", TokenToText(art->token), art->messageid) <0
|| fflush(defer))
- sysfatal("write to defer file %s",path_ductdefer);
+ sysfatal("write to defer file %s",path_defer);
article_done(conn, art, RC_deferred);
break;
return;
}
- assert(ipf == old_input_file);
+ assert(ipf == flushing_input_file);
inputfile_tailing_stop(ipf);
assert(ipf->fd >= 0);
ipf->fd= -1;
assert(sms==sm_SEPARATED || sms==sm_DROPPING);
-
+
if (main_input_file)
inputfile_tailing_start(main_input_file);
}
sysfatal("unable to open input file %s", path);
}
- InputFile *ipf= xmalloc(sizeof(InputFile));
+ InputFile *ipf= xmalloc(sizeof(*ipf) + strlen(path) + 1);
memset(ipf,0,sizeof(*ipf));
ipf->readable.on_readable= tailing_on_readable;
ipf->readable.try_read= tailing_try_read;
ipf->fd= fd;
- ipf->path= path;
+ strcpy(ipf->path, path);
return ipf;
}
if (ipf->fd >= 0)
if (close(ipf->fd)) sysdie("could not close input file %s", ipf->path);
- fixme maybe free ipf->path;
-
free(ipf);
}
}
ipf->offset += recsz + 1;
- if (sms==sm_NORMAL && ipf->offset >= flush_threshold) {
+ if (sms==sm_NORMAL && ipf==main_input_file &&
+ (ipf->offset >= flush_threshold || !until_spontaneous_flush) {
+
notice("starting flush (%lu >= %lu)",
(unsigned long)ipf->offset, (unsigned long)flush_threshold);
int r= link(feedfile, duct_path);
- if (r) sysdie("link feedfile %s to ductfile %s", feedfile, dut_path);
+ if (r) sysdie("link feedfile %s to flushing file %s", feedfile, dut_path);
/* => Hardlinked */
- r= unlink(feedfile);
- if (r) sysdie("unlink old feedfile link %s", feedfile);
+ xunlink(feedfile, "old feedfile link");
/* => Moved */
spawn_inndcomm_flush(); /* => Flushing, sets sms to sm_FLUSHING */
if (ipf==main_input_file) {
errno=EAGAIN;
return -1;
- } else if (ipf==old_input_file) {
+ } else if (ipf==flushing_input_file) {
assert(ipf->fd>=0);
assert(sms==sm_SEPARATED || sms==sm_DROPPING);
} else if (ipf==backlog_input_file) {
assert(!filemon_inotify_wd2ipf[wd]);
filemon_inotify_wd2ipf[wd]= ipf;
+ debug("filemon inotify startfile %p wd=%d wdmax=%d",
+ ipf, wd, filemon_inotify_wdmax);
+
pf->wd= wd;
}
static void filemon_method_stopfile(InputFile *ipf, Filemon_Perfile *pf) {
int wd= pf->wd;
+ debug("filemon inotify stopfile %p wd=%d", ipf, wd);
int r= inotify_rm_watch(filemon_inotify_fd, filemon_inotify_wd);
if (r) sysdie("inotify_rm_watch");
filemon_inotify_wd2ipf[wd]= 0;
die("inotify read %d bytes wanted struct of %d", r, (int)sizeof(iev));
}
InputFile *ipf= filemon_inotify_wd2ipf[iev.wd];
+ debug("filemon inotify readable read %p wd=%p", iev.wd, ipf);
filemon_callback(ipf);
}
return OOP_CONTINUE;
set nonblock;
loop->on_fd(loop, filemon_inotify_fd, OOP_READ, filemon_inotify_readable);
+ debug("filemon inotify init filemon_inotify_fd=%d", filemon_inotify_fd);
return 1;
}
static void inputfile_tailing_stop(InputFile *ipf) {
assert(ipf->fd);
+ oop_rd_cancel(ipf->rd);
oop_rd_delete(ipf->rd);
ipf->rd= 0;
assert(!ipf->filemon); /* we shouldn't be monitoring it now */
}
-/*========== interaction with innd ==========*/
+/*========== interaction with innd - state machine ==========*/
/* See official state diagram at top of file. We implement
* this as follows:
- ================
- WAITING
- [Nothing/Noduct]
- poll for F
- ================
- |
- | TIMEOUT
- |`--------------------------.
- | | install defer as backlog
- | OPEN F SUCCEEDS | exit
- ,--------->| V
- | V =========
- | ======== (ESRCH)
- | NORMAL [Dropped]
- | [Normal] =========
- | main F tail
- | ========
- | |
- | | F IS SO BIG WE SHOULD FLUSH
- ^ | hardlink F to D
- | [Hardlinked]
- | | unlink F
- | | our handle onto F is now onto D
- | [Moved]
- | |
- | |<---------------------------------------------------.
+ .=======.
+ ||START||
+ `======='
+ |
+ | open F
+ |
+ | F ENOENT
+ |`---------------------------------------------------.
+ F OPEN OK | |
+ |`---------------- - - - |
+ D ENOENT | D EXISTS see OVERALL STATES diagram |
+ | for full startup logic |
+ ,--------->| |
+ | V |
+ | ============ try to |
+ | NORMAL open D |
+ | [Normal] |
+ | main F tail |
+ | ============ V
+ | | |
+ | | F IS SO BIG WE SHOULD FLUSH, OR TIMEOUT |
+ ^ | hardlink F to D |
+ | [Hardlinked] |
+ | | unlink F |
+ | | our handle onto F is now onto D |
+ | [Moved] |
+ | | |
+ | |<-------------------<---------------------<---------+
| | |
| | spawn inndcomm flush |
| V |
- | ========== |
+ | ================ |
| FLUSHING |
| [Flushing] |
- | main D tail |
- | ========== |
+ | main D tail/none |
+ | ================ |
| | |
| | INNDCOMM FLUSH FAILS ^
| |`----------------------->----------. |
| | | |
| | NO SUCH SITE V |
- ^ |`--------------->----. =========== |
- | | \ FLUSHFAIL |
- | | \ [Moved] |
- | | \ main D tail |
- | | \ =========== |
+ ^ |`--------------->----. ================ |
+ | | \ FLUSHFAIL |
+ | | \ [Moved] |
+ | | FLUSH OK \ main D tail/none |
+ | | open F \ ================ |
| | \ | |
| | \ | TIME TO RETRY |
- | | \ `----------------'
- | | FLUSH OK \
- | | open F \
- | V V
- | ============= ============
- | SEPARATED/ DROPPING/
- | old->fd>=0 old->fd>=0
- | [Separated] [Dropping]
- | main F idle main none
- | old D tail old D tail
- | ============= ============
- | | |
- ^ | EOF ON D | EOF ON D
- | V V
- | =============== ===============
- | SEPARATED/ DROPPING/
- | old->fd==-1 old->fd==-1
- | [Finishing] [Dropping]
- | main F tail main none
- | old D closed old D closed
- | =============== ===============
- | | |
- | | ALL D PROCESSED | ALL D PROCESSED
- | V install defer as backlog V install defer as backlog
- ^ | close D | close D
+ |<--------'| ,---<---'\ `----------------'
+ | D NONE | | D NONE \
+ | | | \
+ | | | |
+ | | V |
+ | V | V
+ | ============= | ============
+ | SEPARATED/ | DROPPING/
+ | flsh->fd>=0 | flsh->fd>=0
+ | [Separated] | [Dropping]
+ | main F idle | main none
+ | old D tail | old D tail
+ | ============= | ============
+ | | | |
+ ^ | EOF ON D | | EOF ON D
+ | V | V
+ | =============== | ===============
+ | SEPARATED/ | DROPPING/
+ | flsh->fd==-1 V flsh->fd==-1
+ | [Finishing] | [Dropping]
+ | main F tail `. main none
+ | old D closed `. old D closed
+ | =============== `. ===============
+ | | `. |
+ | | ALL D PROCESSED `. | ALL D PROCESSED
+ | V install defer as backlog `. V install defer as backlog
+ ^ | close D \| close D
| | unlink D | unlink D
- | | start new defer | exit
- | | V
- `----------' ==========
+ | | | unlink lock
+ | | | exit
+ `----------' V
+ ==========
(ESRCH)
[Droppped]
==========
*/
-static void open_defer(void) {
- struct stat stab;
-
- assert(!defer);
- defer= fopen(path_ductdefer, "a+");
- if (!defer) sysfatal("could not open defer file %s", path_ductdefer);
-
- /* truncate away any half-written records */
-
- r= fstat(fileno(defer), &stab);
- if (r) sysdie("could not stat newly opened defer file %s", path_ductdefer);
-
- if (stab.st_size > LONG_MAX)
- die("defer file %s size is far too large", path_ductdefer);
+static void statemc_init(void) {
+ struct stat stab, stabf;
+ int noent;
- if (!stab.st_size)
- return;
+ path_lock= xasprintf("%s_lock", feedfile);
+ path_flushing= xasprintf("%s_flushing", feedfile);
+ path_defer= xasprintf("%s_defer", feedfile);
+ globpat_backlog= xasprintf("%s_backlog*", feedfile);
- long orgsize= stab.st_size;
- long truncto= stab.st_size;
for (;;) {
- if (!truncto) break; /* was only (if anything) one half-truncated record */
- if (fseek(defer, truncto-1, SEEK_SET) < 0)
- sysdie("seek in defer file %s while truncating partial", path_ductdefer);
-
- r= getc(defer);
- if (r==EOF) {
- if (ferror(defer))
- sysdie("failed read from defer file %s", path_ductdefer);
- else
- die("defer file %s shrank while we were checking it!", path_ductdefer);
+ int lockfd= open(path_lock, O_CREAT|O_RDWR, 0600);
+ if (lockfd<0) sysfatal("open lockfile %s", path_lock);
+
+ struct flock fl;
+ memset(&fl,0,sizeof(fl));
+ fl.l_type= F_WRLCK;
+ fl.l_whence= SEEK_SET;
+ r= fcntl(lockfd, F_SETLK, &fl);
+ if (r==-1) {
+ if (errno==EACCES || errno==EAGAIN) {
+ if (quiet_if_locked) exit(0);
+ fatal("another duct holds the lockfile");
+ }
+ sysdie("fcntl F_SETLK lockfile %s", path_lock);
}
- if (r=='\n') break;
- truncto--;
- }
- if (stab.st_size != truncto) {
- warn("truncating half-record at end of defer file %s -"
- " shrinking by %ld bytes from %ld to %ld",
- path_ductdefer, orgsize - truncto, orgsize, truncto);
+ xfstat_isreg(lockfd, &stabf, "lockfile");
+ xlstat_isreg(path_lock, &stab, &noent, "lockfile");
- if (fflush(defer))
- sysfatal("could not flush defer file %s", path_ductdefer);
- if (ftruncate(fileno(defer), truncto))
- sysdie("could not truncate defer file %s", path_ductdefer);
+ if (!noent && samefile(&stab, &stabf))
+ break;
- } else {
- info("continuing existing defer file %s (%ld bytes)",
- path_ductdefer, orgsize);
+ if (close(lockfd))
+ sysdie("could not close stale lockfile %s", path_lock);
}
- if (fseek(defer, truncto, SEEK_SET))
- sysdie("could not seek to new end of defer file %s", path_ductdefer);
-}
+ debug("startup: locked");
-static void statemc_init(void) {
- struct stat stab;
+ search_backlog_file();
- path_ductlock= xasprintf("%s_duct.lock", feedfile);
- path_duct= xasprintf("%s_duct", feedfile);
- path_ductdefer= xasprintf("%s_duct.defer", feedfile);
-
- if (lstat(path_ductdefer, &stab)) {
- if (errno!=ENOENT) sysdie("could not check defer file %s", path_defer);
+ xlstat_isreg(path_defer, &stab, &noent, "defer file");
+ if (noent) {
+ debug("startup: ductdefer ENOENT");
} else {
- if (!S_ISREG(stab.st_mode))
- die("defer file %s not a plain file (mode 0%lo)",
- path_defer, (unsigned long)stab.st_mode);
+ debug("startup: ductdefer nlink=%ld", (long)stab.st_nlink);
switch (stab.st_nlink==1) {
- case 1: /* ok */ break;
+ case 1:
+ open_defer(); /* so that we will later close it and rename it */
+ break;
case 2:
- if (unlink(path_defer))
- sysdie("could not unlink stale defer file link %s (presumably"
- " hardlink to backlog file)", path_defer);
+ xunlink(path_defer, "stale defer file link"
+ " (presumably hardlink to backlog file)");
break;
default:
die("defer file %s has unexpected link count %d",
path_defer, stab.st_nlink);
}
}
- open_defer();
-
- int lockfd= open(path_ductlock, O_CREAT|O_RDWR, 0600);
- if (lockfd<0) sysfatal("open lockfile %s", path_ductlock);
-
- struct flock fl;
- memset(&fl,0,sizeof(fl));
- fl.l_type= F_WRLCK;
- fl.l_whence= SEEK_SET;
- r= fcntl(lockfd, F_SETLK, &fl);
- if (r==-1) {
- if (errno==EACCES || errno==EAGAIN) {
- if (quiet_if_locked) exit(0);
- fatal("another duct holds the lockfile");
- }
- sysdie("fcntl F_SETLK lockfile %s", path_ductlock);
- }
- InputFile *file_d= open_input_file(path_duct);
+ InputFile *file_d= open_input_file(path_flushing);
if (file_d) {
struct stat stab_f, stab_d;
- r= stat(feedfile, &stab_f);
- if (r) {
- if (errno!=ENOENT) sysdie("check feed file %s", feedfile);
- /* D exists, F ENOENT => Moved */
+ xlstat_isreg(feedfile, &stab_f, &noent, "feed file");
+ if (noent) {
+ debug("startup: D exists, F ENOENT => Moved");
goto found_moved;
}
- /* F and D both exist */
+ debug("startup: F and D both exist");
- r= fstat(file_d->fd, &stab_d);
- if (r) sysdie("check duct file %s", ductfile);
+ xfstat_isreg(file_d->fd, &stab_d, "flushing file");
- if (stab_d.st_ino == stab_f.st_ino &&
- stab_d.st_dev == stab_f.st_dev) {
- /* F==D => Hardlinked*/
- r= unlink(path_duct);
- if (r) sysdie("unlink feed file %s during startup", feedfile);
+ if (samefile(&stab_d, &stab_f)) {
+ debug("startup: F==D => Hardlinked");
+ xunlink(path_flushing, "feed file (during startup)");
found_moved:
- /* => Moved */
+ debug(" => Moved");
startup_set_input_file(file_d);
spawn_inndcomm_flush(); /* => Flushing, sets sms to sm_FLUSHING */
} else {
- /* F!=D => Separated */
+ debug("F!=D => Separated");
SMS(SEPARATED, 0, "found both old and current feed files");
startup_set_input_file(file_d);
}
- } else { /*!file_d*/
+ } else {
+ debug("startup: D ENOENT => Nothing");
SMS(WAITING, open_wait_periods, "no feed file currently exists");
}
}
static void startup_set_input_file(InputFile *f) {
assert(!main_input_file);
main_input_file= f;
+ until_spontaneous_flush= spontaneous_flush_periods;
inputfile_tailing_start(f);
}
if (ipf == backlog_input_file) {
notice_processed(ipf,"backlog file",ipf->path);
- if (unlink(ipf->path))
- sysdie("could not unlink done backlog file %s", ipf->path);
close_input_file(ipf);
- fixme trigger search for new backlog file;
+ if (unlink(ipf->path)) {
+ if (errno != ENOENT)
+ sysdie("could not unlink processed backlog file %s", ipf->path);
+ warn("backlog file %s vanished while we were reading it"
+ " so we couldn't remove it (but it's done now, anyway)",
+ ipf->path);
+ }
+ backlog_input_file= 0;
+ search_backlog_file();
+ return;
}
- assert(ipf == old_input_file);
+ assert(ipf == flushing_input_file);
assert(sms==sm_SEPARATED || sms==sm_DROPPING);
notice_processed(ipf,"feed file",0);
- r= fstat(fileno(defer), &stab);
- if (r) sysdie("check defer file %s", path_defer);
-
- if (fclose(defer)) sysfatal("could not close defer file %s", path_defer);
- defer= 0;
-
- char *backlog= xasprintf("%s_backlog_%lu.%lu", feedfile,
- (unsigned long)now.tv_sec,
- (unsigned long)stab.st_ino);
- if (link(path_defer, path_backlog))
- sysfatal("could not install defer file %s as backlog file %s",
- path_defer, backlog);
- if (unlink(path_defer))
- sysdie("could not unlink old defer link %s to backlog file %s",
- path_defer, backlog);
+ close_defer();
- if (unlink(path_duct))
- sysdie("could not unlink old duct file %s", path_duct);
+ xunlink(path_flushing, "old flushing file");
if (sms==sm_DROPPING) {
- notice("feed dropped and our work is complete"
- " (but check for backlog files)");
+ if (search_backlog_file()) {
+ debug("feed dropped but still backlogs to process");
+ return;
+ }
+ notice("feed dropped and our work is complete");
+ xunlink(path_lock, "lockfile for old feed");
exit(0);
}
open_defer();
- close_input_file(old_input_file);
- old_input_file= 0;
+ close_input_file(flushing_input_file);
+ flushing_input_file= 0;
notice("flush complete");
SMS(NORMAL, 0, "flush complete");
}
}
+/*---------- defer and backlog files ----------*/
+
+static void open_defer(void) {
+ struct stat stab;
+
+ if (defer) return;
+
+ defer= fopen(path_defer, "a+");
+ if (!defer) sysfatal("could not open defer file %s", path_defer);
+
+ /* truncate away any half-written records */
+
+ xfstat_isreg(fileno(defer), &stab, "newly opened defer file");
+
+ if (stab.st_size > LONG_MAX)
+ die("defer file %s size is far too large", path_defer);
+
+ if (!stab.st_size)
+ return;
+
+ long orgsize= stab.st_size;
+ long truncto= stab.st_size;
+ for (;;) {
+ if (!truncto) break; /* was only (if anything) one half-truncated record */
+ if (fseek(defer, truncto-1, SEEK_SET) < 0)
+ sysdie("seek in defer file %s while truncating partial", path_defer);
+
+ r= getc(defer);
+ if (r==EOF) {
+ if (ferror(defer))
+ sysdie("failed read from defer file %s", path_defer);
+ else
+ die("defer file %s shrank while we were checking it!", path_defer);
+ }
+ if (r=='\n') break;
+ truncto--;
+ }
+
+ if (stab.st_size != truncto) {
+ warn("truncating half-record at end of defer file %s -"
+ " shrinking by %ld bytes from %ld to %ld",
+ path_defer, orgsize - truncto, orgsize, truncto);
+
+ if (fflush(defer))
+ sysfatal("could not flush defer file %s", path_defer);
+ if (ftruncate(fileno(defer), truncto))
+ sysdie("could not truncate defer file %s", path_defer);
+
+ } else {
+ info("continuing existing defer file %s (%ld bytes)",
+ path_defer, orgsize);
+ }
+ if (fseek(defer, truncto, SEEK_SET))
+ sysdie("could not seek to new end of defer file %s", path_defer);
+}
+
+static void close_defer(void) {
+ if (!defer)
+ return;
+
+ xfstat(fileno(defer), &stab, "defer file");
+
+ if (fclose(defer)) sysfatal("could not close defer file %s", path_defer);
+ defer= 0;
+
+ char *backlog= xasprintf("%s_backlog_%lu.%lu", feedfile,
+ (unsigned long)now.tv_sec,
+ (unsigned long)stab.st_ino);
+ if (link(path_defer, path_backlog))
+ sysfatal("could not install defer file %s as backlog file %s",
+ path_defer, backlog);
+ if (unlink(path_defer))
+ sysdie("could not unlink old defer link %s to backlog file %s",
+ path_defer, backlog);
+
+ if (until_backlog_nextscan < 0 ||
+ until_backlog_nextscan > backlog_retry_minperiods + 1)
+ until_backlog_nextscan= backlog_retry_minperiods + 1;
+}
+
+static void poll_backlog_file(void) {
+ if (until_backlog_nextscan < 0) return;
+ if (until_backlog_nextscan-- > 0) return;
+ search_backlog_file();
+}
+
+static int search_backlog_file(void) {
+ /* returns non-0 iff there are any backlog files */
+
+ glob_t gl;
+ int r;
+ struct stat stab;
+ const char *oldest_path=0;
+ time_t oldest_mtime, now;
+
+ if (backlog_input_file) return 3;
+
+ try_again:
+
+ r= glob(globpat_backlog, GLOB_ERR|GLOB_MARK|GLOB_NOSORT, 0, &gl);
+
+ switch (r) {
+ case GLOB_ABORTED:
+ sysdie("failed to expand backlog pattern %s", globpat_backlog);
+ case GLOB_NOSPACE:
+ die("out of memory expanding backlog pattern %s", globpat_backlog);
+ case 0:
+ for (i=0; i<gl.gl_pathc; i++) {
+ const char *path= gl.gl_pathv[i];
+
+ if (strchr(path,'#') || strchr(path,'~')) {
+ debug("backlog file search skipping %s", path);
+ continue;
+ }
+ r= stat(path, &stab);
+ if (r) {
+ syswarn("failed to stat backlog file %s", path);
+ continue;
+ }
+ if (!S_ISREG(stab.st_mode)) {
+ warn("backlog file %s is not a plain file (or link to one)", path);
+ continue;
+ }
+ if (!oldest_path || stab.st_mtime < oldest_mtime) {
+ oldest_path= path;
+ oldest_mtime= stab.st_mtime;
+ }
+ }
+ case GLOB_NOMATCH: /* fall through */
+ break;
+ default:
+ sysdie("glob expansion of backlog pattern %s gave unexpected"
+ " nonzero (error?) return value %d", globpat_backlog, r);
+ }
+
+ globfree(&gl);
+
+ if (!oldest_path) {
+ debug("backlog scan: none");
+ until_backlog_nextscan= backlog_spontaneous_rescan_periods;
+ return 0;
+ }
+
+ now= time(); if (now==-1) sysdie("time(2) failed");
+ double age= difftime(now, oldest_mtime);
+ long age_deficiency= (backlog_retry_minperiods * PERIOD_SECONDS) - age;
+
+ if (age_deficiency <= 0) {
+ debug("backlog scan: found age=%f deficiency=%ld oldest=%s",
+ age, age_deficiency, oldest_path);
+
+ backlog_input_file= open_input_file(oldest_path);
+ if (!backlog_input_file) {
+ warn("backlog file %s vanished as we opened it", backlog_input_file);
+ goto try_again;
+ }
+ inputfile_tailing_start(backlog_input_file);
+ until_backlog_nextscan= -1;
+ return 1;
+ }
+
+ until_backlog_nextscan= age_deficiency / PERIOD_SECONDS;
+
+ if (backlog_spontaneous_rescan_periods >= 0 &&
+ until_backlog_nextscan > backlog_spontaneous_rescan_periods)
+ until_backlog_nextscan= backlog_spontaneous_rescan_periods;
+
+ debug("backlog scan: young age=%f deficiency=%ld nextscan=%d oldest=%s",
+ age, age_deficiency, until_backlog_nextscan, oldest_path);
+ return 2;
+}
+
/*========== flushing the feed ==========*/
static pid_t inndcomm_child;
loop->cancel_fd(fd);
close(fd);
- assert(!old_input_file);
+ assert(!flushing_input_file);
if (WIFEXITED(status)) {
switch (WEXITSTATUS(status)) {
-
+
case INNDCOMMCHILD_ESTATUS_FAIL:
goto failed;
case INNDCOMMCHILD_ESTATUS_NONESUCH:
warn("feed has been dropped by innd, finishing up");
- old_input_file= main_input_file;
+ flushing_input_file= main_input_file;
main_input_file= 0;
SMS(DROPPING, 0, "dropped by innd");
return OOP_CONTINUE;
case 0:
- old_input_file= main_input_file;
+ flushing_input_file= main_input_file;
main_input_file= open_input_file(feedfile);
if (!main_input_file)
die("flush succeeded but feedfile %s does not exist!", feedfile);
+ until_spontaneous_flush= spontaneous_flush_periods;
SMS(SEPARATED, 0, "feed file missing");
return OOP_CONTINUE;
default:
goto unexpected_exitstatus;
-
+
}
} else if (WIFSIGNALED(status) && WTERMSIG(status) == SIGALRM) {
warn("flush timed out trying to talk to innd");
sysdie("%s child: failed to reset SIGPIPE");
postfork_inputfile(main_input_file);
- postfork_inputfile(old_input_file);
+ postfork_inputfile(flushing_input_file);
postfork_conns(idle.head);
postfork_conns(working.head);
postfork_conns(full.head);
postfork_stdio(defer);
}
-
#define EVERY(what, interval, body) \
static const struct timeval what##_timeout = { 5, 0 }; \
static void what##_schedule(void); \
loop->on_time(loop, what##_timeout, what##_timedout, 0); \
}
-EVERY(filepoll, {5,0}, { check_master_queue(); })
+EVERY(filepoll, {5,0}, {
+ if (main_input_file && main_input_file->readable_callback)
+ filemon_callback(main_input_file);
+});
+
+#define DEBUGF_IPF(wh) " " #wh "=%p/%s:ip=%ld,off=%ld,fd=%d%s" \
+#define DEBUG_IPF(sh) \
+ wh##_input_file, debug_ipf_path(wh##_input_file), \
+ wh##_input_file->inprogress, (long)wh##_input_file->offset, \
+ wh##_input_file->fd, wh##_input_file->rd ? "+" : ""
+static const char *debug_ipf_path(InputFile *ipf) {
+ char *slash= strrchr(ipf->path,'/');
+ return slash ? slash+1 : ipf->path;
+}
EVERY(period, {PERIOD_SECONDS,0}, {
+ debug("PERIOD"
+ " sms=%s queue=%d sm_period_counter=%d"
+ " connect_delay=%d until_spontaneous_flush=%d"
+ " input_files" DEBUGF_IPF(main) DEBUGF_IPF(old) DEBUGF_FMT(flushing)
+ " conns idle=%d working=%d full=%d"
+ " children connecting=%ld inndcomm_child"
+ ,
+ sms_names[sms], queue.count, sm_period_counter,
+ connect_delay, until_spontaneous_flush,
+ DEBUG_IPF(main), DEBUG_IPF(flushing), DEBUG_IPF(flushing),
+ idle.count, working.count, full.count,
+ (long)connecting_child, (long)inndcomm_child
+ );
if (connect_delay) connect_delay--;
+ if (until_spontaneous_flush) until_spontaneous_flush--;
+ poll_backlog_file();
+ if (!backlog_input_file) close_defer(); /* want to start on a new backlog */
statemc_poll();
check_master_queue();
});
void op_seconds(const Option *o, const char *val) {
int *store= o->store;
char *ep;
-
+
double v= strtod(val,&ep);
if (ep==val) badusage("bad time/duration value for %s",o->long);
int main(int argc, char **argv) {
const char *arg;
-
+
for (;;) {
arg= *++argv;
if (!arg) break;
}
if (!arg) badusage("need site name argument");
- if (*++argv) badusage("too many non-option arguments");
sitename= arg;
+ if ((arg= *++argv)) {
+ if (remote_host) badusage("must not specify -h and also host as argument");
+ remote_host= arg;
+ }
+
+ if (*++argv) badusage("too many non-option arguments");
+
if (nocheck_thresh_pct < 0 || nocheck_thresh_pct > 100)
badusage("nocheck threshold percentage must be between 0..100");
nocheck_thresh= nocheck_thresh_pct * 0.01;
if (nocheck_decay_articles < 0.1)
badusage("nocheck decay articles must be at least 0.1");
nocheck_decay= 1 - 1/nocheck_decay_articles;
-
+
innconf_read(inndconffile);
if (!feedfile)
badusage("feed filename must be nonempty");
else if (feedfile[strlen(feedfile)-1]=='/')
feedfile= xasprintf("%s%s",feedfile,sitename);
-
+
+ const char *feedfile_forbidden= "?*[~#";
+ int c;
+ while ((c= *feedfile_forbidden++))
+ if (strchr(feedfile, c))
+ badusage("feed filename may not contain metacharacter %c",c);
+
if (signal(SIGPIPE, SIG_IGN) == SIG_ERR)
sysdie("could not ignore SIGPIPE");
dup2(null,1);
dup2(null,2);
close(null);
-
+
pid_t child1= xfork("daemonise first fork");
if (child1) _exit(0);
~ian / inn-innduct.git / blobdiff