shithub: gefs

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fs: implement DMAPPEND files

--- a/TODO

+++ b/TODO

@@ -1,6 +1,8 @@

 *** commit blockers ***

 - atomics for all archs

 - docs

+- ORCLOSE

+- clunk fids on connection

 *** important bits ***

 - repair tools

--- a/fs.c

+++ b/fs.c

@@ -1819,7 +1819,7 @@

 		unlock(f);

 		error(Einuse);

 	}

-	if(m->mode & OTRUNC){

+	if((m->mode & OTRUNC) && !(f->dent->mode & DMAPPEND)){

 		wlock(f->dent);

 		if(waserror()){

@@ -2087,6 +2087,8 @@

 	p = m->data;

 	o = m->offset;

 	c = m->count;

+	if(f->dent->mode & DMAPPEND)

+		o = f->dent->length;

 	t = agetp(&f->mnt->root);

 	for(i = 0; i < nelem(kv)-1 && c != 0; i++){

 		assert(i == 0 || o%Blksz == 0);

@@ -2113,11 +2115,10 @@

 	kv[i].op = Owstat;

 	kv[i].k = f->dent->k;

 	kv[i].nk = f->dent->nk;

-	n = m->offset+w;

 	*p++ = 0;

-	if(n > f->dent->length){

+	if(o > f->dent->length){ 

 		sbuf[0] |= Owsize;

-		PACK64(p, n);

+		PACK64(p, o);

 		p += 8;

 		f->dent->length = m->offset+m->count;

 	}