Imbus/xv6-riscv-kernel
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every iput() and namei() must be inside a transaction

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This commit is contained in:
Robert Morris 2014-08-04 13:06:48 -04:00
parent 020c8e2384
commit 2c56547272
6 changed files with 145 additions and 17 deletions
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10
exec.c
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@ -18,8 +18,11 @@ exec(char *path, char **argv)
struct proghdr ph;
pde_t *pgdir, *oldpgdir;
if((ip = namei(path)) == 0)
begin_trans();
if((ip = namei(path)) == 0){
commit_trans();
return -1;
}
ilock(ip);
pgdir = 0;
@ -47,6 +50,7 @@ exec(char *path, char **argv)
goto bad;
}
iunlockput(ip);
commit_trans();
ip = 0;
// Allocate two pages at the next page boundary.
@ -95,7 +99,9 @@ exec(char *path, char **argv)
bad:
if(pgdir)
freevm(pgdir);
if(ip)
if(ip){
iunlockput(ip);
commit_trans();
}
return -1;
}