Imbus/xv6-riscv-kernel
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log write() data

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usertest for big write()s
push begin_trans/commit_trans down into syscalls
This commit is contained in:
Robert Morris 2011-08-12 09:25:39 -04:00
parent bd71a45046
commit 2e59046362
7 changed files with 143 additions and 43 deletions
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4
fs.c
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@ -437,13 +437,13 @@ writei(struct inode *ip, char *src, uint off, uint n)
if(off > ip->size || off + n < off)
return -1;
if(off + n > MAXFILE*BSIZE)
n = MAXFILE*BSIZE - off;
return -1;
for(tot=0; tot<n; tot+=m, off+=m, src+=m){
bp = bread(ip->dev, bmap(ip, off/BSIZE));
m = min(n - tot, BSIZE - off%BSIZE);
memmove(bp->data + off%BSIZE, src, m);
bwrite(bp);
log_write(bp);
brelse(bp);
}