diff options
Diffstat (limited to 'usr/src/uts/common/nfs/export.h')
| -rw-r--r-- | usr/src/uts/common/nfs/export.h | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/usr/src/uts/common/nfs/export.h b/usr/src/uts/common/nfs/export.h index 9bc35d0a6a..118b6c1f88 100644 --- a/usr/src/uts/common/nfs/export.h +++ b/usr/src/uts/common/nfs/export.h @@ -214,13 +214,51 @@ struct ex_vol_rename { #endif /* VOLATILE_FH_TEST */ /* + * An auth cache entry can exist in 4 active states, with the inactive + * state being indicated by no entry in the cache. + * + * A FRESH entry is one which is either new or has been refreshed at + * least once. + * + * A STALE entry is one which has been detected to be too old. The + * transistion from FRESH to STALE prevents multiple threads from + * submitting refresh requests. + * + * A REFRESHING entry is one which is actively engaging the user land + * mountd code to re-authenticate the cache entry. + * + * An INVALID entry was one which was either STALE or REFRESHING + * and was deleted out of the encapsulating exi. Since we can't + * delete it yet, we mark it as INVALID, which lets the refreshq + * know not to work on it. + * + * Note that the auth state of the entry is always valid, even if the + * entry is STALE. Just as you can eat stale bread, you can consume + * a stale cache entry. The only time the contents change could be + * during the transistion from REFRESHING to FRESH. + */ +typedef enum auth_state { + NFS_AUTH_FRESH, + NFS_AUTH_STALE, + NFS_AUTH_REFRESHING, + NFS_AUTH_INVALID +} auth_state_t; + +/* * An authorization cache entry + * + * Either the state in auth_state will protect the + * contents or auth_lock must be held. */ struct auth_cache { struct netbuf auth_addr; int auth_flavor; int auth_access; time_t auth_time; + time_t auth_freshness; + auth_state_t auth_state; + char *auth_netid; + kmutex_t auth_lock; struct auth_cache *auth_next; }; @@ -390,6 +428,7 @@ extern treenode_t *ns_root; * * exi_count+exi_lock protects an individual exportinfo from being freed * when in use. + * * You must have the writer lock on exported_lock to add/delete an exportinfo * structure to/from the list. * @@ -510,6 +549,7 @@ extern vnode_t *lm_fhtovp(fhandle_t *fh); extern vnode_t *lm_nfs3_fhtovp(nfs_fh3 *fh); extern struct exportinfo *checkexport(fsid_t *, struct fid *); extern struct exportinfo *checkexport4(fsid_t *, struct fid *, vnode_t *vp); +extern void exi_hold(struct exportinfo *); extern void exi_rele(struct exportinfo *); extern struct exportinfo *nfs_vptoexi(vnode_t *, vnode_t *, cred_t *, int *, int *, bool_t); |