sanchayanmaity/xv6-cs450
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try harder to get directory refcounts right

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This commit is contained in:
kolya 2008-10-17 12:42:13 +00:00
parent f3e87bc838
commit 15a2693637
1 changed files with 8 additions and 2 deletions
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6
sysfile.c
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@ -199,6 +199,10 @@ sys_unlink(void)
memset(&de, 0, sizeof(de)); memset(&de, 0, sizeof(de));
if(writei(dp, (char*)&de, off, sizeof(de)) != sizeof(de)) if(writei(dp, (char*)&de, off, sizeof(de)) != sizeof(de))
panic("unlink: writei"); panic("unlink: writei");
if(ip->type == T_DIR){
dp->nlink--;
iupdate(dp);
}
iunlockput(dp); iunlockput(dp);
ip->nlink--; ip->nlink--;
@ -247,8 +251,10 @@ create(char *path, int canexist, short type, short major, short minor)
} }
if(dirlink(dp, name, ip->inum) < 0){ if(dirlink(dp, name, ip->inum) < 0){
if(type == T_DIR){
dp->nlink--; dp->nlink--;
iupdate(dp); iupdate(dp);
}
iunlockput(dp); iunlockput(dp);
ip->nlink = 0; ip->nlink = 0;