ref: 7975eec3e602fd5bc3e93c78f4166259190f2fe9
dir: /libnandfs/writeblock.c/
#include "logfsos.h" #include "logfs.h" #include "nandfs.h" #include "local.h" char * nandfswriteblock(Nandfs *nandfs, void *buf, uchar tag, ulong path, int xcount, long *data, long block) { int p; char *errmsg; ulong opath = nandfsgetpath(nandfs, block); ulong writepath = (~opath | path) & NandfsPathMask; uchar writetag = ~nandfsgettag(nandfs, block) | tag; int ppb = 1 << nandfs->ll.l2pagesperblock; for (p = 0; p < ppb; p++) { ulong wp; if (p > 0 && p <= 2 + xcount) { switch (p) { case 1: wp = (~opath | nandfsgetbaseblock(nandfs)) & NandfsPathMask; break; case 2: wp = (~opath | nandfs->ll.blocks) & NandfsPathMask; break; default: wp = (~opath | data[p - 3]) & NandfsPathMask; break; } } else wp = writepath; errmsg = nandfsupdatepage(nandfs, buf, wp, writetag, block, p); if (errmsg) return errmsg; #ifdef LOGFSTEST if (logfstest.partialupdate && p > 0) { print("skipping pageupdate\n"); break; } #endif buf = (uchar *)buf + NandfsPageSize; } return nil; }