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Acquire the rangelock for truncate(2) as well.

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Reported and reviewed by:	avg
Tested by:	pho
MFC after:	1 week
This commit is contained in:
Konstantin Belousov 2012-10-15 18:15:18 +00:00
parent c4acc58d1d
commit 36c6f3aaae
1 changed files with 7 additions and 3 deletions
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10
sys/kern/vfs_syscalls.c
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@ -3433,10 +3433,10 @@ kern_truncate(struct thread *td, char *path, enum uio_seg pathseg, off_t length)
{
struct mount *mp;
struct vnode *vp;
void *rl_cookie;
struct vattr vattr;
int error;
struct nameidata nd;
int vfslocked;
int error, vfslocked;
if (length < 0)
return(EINVAL);
@ -3445,7 +3445,9 @@ kern_truncate(struct thread *td, char *path, enum uio_seg pathseg, off_t length)
return (error);
vfslocked = NDHASGIANT(&nd);
vp = nd.ni_vp;
rl_cookie = vn_rangelock_wlock(vp, 0, OFF_MAX);
if ((error = vn_start_write(vp, &mp, V_WAIT | PCATCH)) != 0) {
vn_rangelock_unlock(vp, rl_cookie);
vrele(vp);
VFS_UNLOCK_GIANT(vfslocked);
return (error);
@ -3464,8 +3466,10 @@ kern_truncate(struct thread *td, char *path, enum uio_seg pathseg, off_t length)
vattr.va_size = length;
error = VOP_SETATTR(vp, &vattr, td->td_ucred);
}
vput(vp);
VOP_UNLOCK(vp, 0);
vn_finished_write(mp);
vn_rangelock_unlock(vp, rl_cookie);
vrele(vp);
VFS_UNLOCK_GIANT(vfslocked);
return (error);
}