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Remove XXX comments about EA transaction support and provide a more

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general and detailed comment on the topic of EA transactions and kernel
warnings.

Obtained from:	TrustedBSD Project
This commit is contained in:
Robert Watson 2006-12-28 22:02:59 +00:00
parent 9b637ee9dd
commit bd8a9c45aa
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=165601
1 changed files with 11 additions and 6 deletions
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17
sys/security/mac/mac_vfs.c
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@ -268,6 +268,15 @@ mac_associate_vnode_singlelabel(struct mount *mp, struct vnode *vp)
vp->v_label);
}
/*
* Functions implementing extended-attribute backed labels for file systems
* that support it.
*
* Where possible, we use EA transactions to make writes to multiple
* attributes across difference policies mutually atomic. We allow work to
* continue on file systems not supporting EA transactions, but generate a
* printf warning.
*/
int
mac_create_vnode_extattr(struct ucred *cred, struct mount *mp,
struct vnode *dvp, struct vnode *vp, struct componentname *cnp)
@ -279,7 +288,6 @@ mac_create_vnode_extattr(struct ucred *cred, struct mount *mp,
error = VOP_OPENEXTATTR(vp, cred, curthread);
if (error == EOPNOTSUPP) {
/* XXX: Optionally abort if transactions not supported. */
if (ea_warn_once == 0) {
printf("Warning: transactions not supported "
"in EA write.\n");
@ -297,9 +305,8 @@ mac_create_vnode_extattr(struct ucred *cred, struct mount *mp,
}
error = VOP_CLOSEEXTATTR(vp, 1, NOCRED, curthread);
if (error == EOPNOTSUPP)
error = 0; /* XXX */
error = 0;
return (error);
}
@ -314,7 +321,6 @@ mac_setlabel_vnode_extattr(struct ucred *cred, struct vnode *vp,
error = VOP_OPENEXTATTR(vp, cred, curthread);
if (error == EOPNOTSUPP) {
/* XXX: Optionally abort if transactions not supported. */
if (ea_warn_once == 0) {
printf("Warning: transactions not supported "
"in EA write.\n");
@ -331,9 +337,8 @@ mac_setlabel_vnode_extattr(struct ucred *cred, struct vnode *vp,
}
error = VOP_CLOSEEXTATTR(vp, 1, NOCRED, curthread);
if (error == EOPNOTSUPP)
error = 0; /* XXX */
error = 0;
return (error);
}