ref: d1540c7f666e3c5d636b48c956b444205b50502d
dir: /liblogfs/dump.c/
#include "logfsos.h" #include "logfs.h" #include "local.h" #include "fcall.h" typedef struct WalkState { u32int *flashaddrp; u32int *lengthp; int i; int nth; } WalkState; static int walk(void *magic, Extent *e, int hole) { WalkState *s = magic; USED(hole); if(s->i == s->nth) { *s->flashaddrp = e->flashaddr; *s->lengthp = e->max - e->min; return 0; } s->i++; return 1; } char * logfsserverreadpathextent(LogfsServer *server, u32int path, int nth, u32int *flashaddrp, u32int *lengthp, long *blockp, int *pagep, int *offsetp) { Entry *e; WalkState s; long index; e = logfspathmapfinde(server->pathmap, path); if(e == nil) return logfseunknownpath; if(e->perm & DMDIR) return Eisdir; s.flashaddrp = flashaddrp; s.lengthp = lengthp; s.i = 0; s.nth = nth; *lengthp = 0; logfsextentlistwalk(e->u.file.extent, walk, &s); if(*lengthp) { logfsflashaddr2spo(server, *flashaddrp, &index, pagep, offsetp); if(*flashaddrp & LogAddr) if(index >= server->activelog->unsweptblockindex) if(index <= server->activelog->curblockindex) *blockp = server->activelog->blockmap[index]; else *blockp = -1; else if(server->sweptlog) if(index <= server->sweptlog->curblockindex) *blockp = server->sweptlog->blockmap[index]; else *blockp = -1; else *blockp = -1; else if(index < server->ndatablocks) *blockp = server->datablock[index].block; else *blockp = -1; } else { *blockp = 0; *pagep = 0; *offsetp = 0; } return nil; }