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o Introduce vn_extattr_rm(), a helper function in the style of

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vn_extattr_get() and vn_extattr_set().  vn_extattr_rm() removes the
  specified extended attribute from a vnode, authorizing the change as
  the kernel (NULL cred).

Obtained from:	TrustedBSD Project
This commit is contained in:
Robert Watson 2000-09-22 22:33:13 +00:00
parent 083d01f20d
commit 100d2c187c
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=66272
2 changed files with 25 additions and 0 deletions
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23
sys/kern/vfs_vnops.c
View File

@ -953,3 +953,26 @@ vn_extattr_set(struct vnode *vp, int ioflg, const char *attrname, int buflen,
return (error);
}
int
vn_extattr_rm(struct vnode *vp, int ioflg, const char *attrname, struct proc *p)
{
struct mount *mp;
int error;
if ((ioflg & IO_NODELOCKED) == 0) {
if ((error = vn_start_write(vp, &mp, V_WAIT)) != 0)
return (error);
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
}
/* authorize attribute removal as kernel */
error = VOP_SETEXTATTR(vp, attrname, NULL, NULL, p);
if ((ioflg & IO_NODELOCKED) == 0) {
vn_finished_write(mp);
VOP_UNLOCK(vp, 0, p);
}
return (error);
}

2
sys/sys/vnode.h
View File

@ -601,6 +601,8 @@ int vn_extattr_get __P((struct vnode *vp, int ioflg, const char *attrname,
int *buflen, char *buf, struct proc *p));
int vn_extattr_set __P((struct vnode *vp, int ioflg, const char *attrname,
int buflen, char *buf, struct proc *p));
int vn_extattr_rm(struct vnode *vp, int ioflg, const char *attrname,
struct proc *p);
int vfs_cache_lookup __P((struct vop_lookup_args *ap));
int vfs_object_create __P((struct vnode *vp, struct proc *p,
struct ucred *cred));