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Differential D20808 Diff 59288 head/sys/kern/vfs_vnops.c

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head/sys/kern/vfs_vnops.c

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/* /*
* File table truncate routine. * File table truncate routine.
*/ */
static int static int
vn_truncate(struct file *fp, off_t length, struct ucred *active_cred, vn_truncate(struct file *fp, off_t length, struct ucred *active_cred,
struct thread *td) struct thread *td)
{ {
struct vattr vattr;
struct mount *mp; struct mount *mp;
struct vnode *vp; struct vnode *vp;
void *rl_cookie; void *rl_cookie;
int error; int error;
vp = fp->f_vnode; vp = fp->f_vnode;
/* /*
Show All 10 Lines if (vp->v_type == VDIR) {
error = EISDIR; error = EISDIR;
goto out; goto out;
} }
#ifdef MAC #ifdef MAC
error = mac_vnode_check_write(active_cred, fp->f_cred, vp); error = mac_vnode_check_write(active_cred, fp->f_cred, vp);
if (error) if (error)
goto out; goto out;
#endif #endif
error = vn_truncate_locked(vp, length, (fp->f_flag & O_FSYNC) != 0,
fp->f_cred);
out:
VOP_UNLOCK(vp, 0);
vn_finished_write(mp);
out1:
vn_rangelock_unlock(vp, rl_cookie);
return (error);
}
/*
* Truncate a file that is already locked.
*/
int
vn_truncate_locked(struct vnode *vp, off_t length, bool sync,
struct ucred *cred)
{
struct vattr vattr;
int error;
error = VOP_ADD_WRITECOUNT(vp, 1); error = VOP_ADD_WRITECOUNT(vp, 1);
if (error == 0) { if (error == 0) {
VATTR_NULL(&vattr); VATTR_NULL(&vattr);
vattr.va_size = length; vattr.va_size = length;
if ((fp->f_flag & O_FSYNC) != 0) if (sync)
vattr.va_vaflags |= VA_SYNC; vattr.va_vaflags |= VA_SYNC;
error = VOP_SETATTR(vp, &vattr, fp->f_cred); error = VOP_SETATTR(vp, &vattr, cred);
VOP_ADD_WRITECOUNT_CHECKED(vp, -1); VOP_ADD_WRITECOUNT_CHECKED(vp, -1);
} }
out:
VOP_UNLOCK(vp, 0);
vn_finished_write(mp);
out1:
vn_rangelock_unlock(vp, rl_cookie);
return (error); return (error);
} }
/* /*
* File table vnode stat routine. * File table vnode stat routine.
*/ */
static int static int
vn_statfile(struct file *fp, struct stat *sb, struct ucred *active_cred, vn_statfile(struct file *fp, struct stat *sb, struct ucred *active_cred,
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