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extattr_list_vp: Narrow locked section somewhat

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Suggested by:	mjg
Reviewed by:	kib, mjg
Sponsored by:	Dell EMC Isilon
Differential Revision:	https://reviews.freebsd.org/D19083
This commit is contained in:
Conrad Meyer 2019-02-05 04:47:21 +00:00
parent c3eb848ce3
commit e682df5397
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=343762
1 changed files with 7 additions and 8 deletions
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15
sys/kern/vfs_extattr.c
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@ -633,8 +633,6 @@ extattr_list_vp(struct vnode *vp, int attrnamespace, void *data,
if (nbytes > IOSIZE_MAX)
return (EINVAL);
vn_lock(vp, LK_SHARED | LK_RETRY);
auiop = NULL;
sizep = NULL;
cnt = 0;
@ -653,24 +651,25 @@ extattr_list_vp(struct vnode *vp, int attrnamespace, void *data,
} else
sizep = &size;
vn_lock(vp, LK_SHARED | LK_RETRY);
#ifdef MAC
error = mac_vnode_check_listextattr(td->td_ucred, vp, attrnamespace);
if (error)
goto done;
if (error) {
VOP_UNLOCK(vp, 0);
return (error);
}
#endif
error = VOP_LISTEXTATTR(vp, attrnamespace, auiop, sizep,
td->td_ucred, td);
VOP_UNLOCK(vp, 0);
if (auiop != NULL) {
cnt -= auio.uio_resid;
td->td_retval[0] = cnt;
} else
td->td_retval[0] = size;
#ifdef MAC
done:
#endif
VOP_UNLOCK(vp, 0);
return (error);
}