xnu-1699.22.81.tar.gz

[apple/xnu.git] / bsd / sys / namei.h

diff --git a/bsd/sys/namei.h b/bsd/sys/namei.h
index c0a8368bad839c52424ac453ed86ca99cd6b7259..56d3ecf139bf99138bf7980368196cdcae076890 100644 (file)
--- a/bsd/sys/namei.h
+++ b/bsd/sys/namei.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000-2007 Apple Inc. All rights reserved.
+ * Copyright (c) 2000-2010 Apple Inc. All rights reserved.
  *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * 
@@ -90,12 +90,15 @@
 /*
  * Encapsulation of namei parameters.
  */
-struct nameidata {
+struct nameidata {                         
        /*
         * Arguments to namei/lookup.
         */
        user_addr_t ni_dirp;            /* pathname pointer */
        enum    uio_seg ni_segflg;      /* location of pathname */
+#if CONFIG_TRIGGERS
+       enum    path_operation ni_op;   /* intended operation, see enum path_operation in vnode.h */
+#endif /* CONFIG_TRIGGERS */
        /*
         * Arguments to lookup.
         */
@@ -116,8 +119,25 @@ struct nameidata {
        u_long  ni_loopcnt;             /* count of symlinks encountered */
 
        struct componentname ni_cnd;
+       int32_t ni_flag;
+       int ni_ncgeneration;            /* For a batched vnop, grab generation beforehand */
 };
 
+#define NAMEI_CONTLOOKUP       0x002    /* Continue processing a lookup which was partially processed in a compound VNOP */
+#define NAMEI_TRAILINGSLASH    0x004    /* There was at least one trailing slash after last component */
+#define NAMEI_UNFINISHED       0x008    /* We broke off a lookup to do a compound op */
+/* 
+ * XXX Hack: we need to encode the intended VNOP in order to 
+ * be able to include information about which operations a filesystem
+ * supports in the decision to break off a lookup early.
+ */
+#define NAMEI_COMPOUNDOPEN     0x010   
+#define NAMEI_COMPOUNDREMOVE   0x020   
+#define NAMEI_COMPOUNDMKDIR    0x040   
+#define NAMEI_COMPOUNDRMDIR    0x080   
+#define NAMEI_COMPOUNDRENAME   0x100   
+#define NAMEI_COMPOUND_OP_MASK (NAMEI_COMPOUNDOPEN | NAMEI_COMPOUNDREMOVE | NAMEI_COMPOUNDMKDIR | NAMEI_COMPOUNDRMDIR | NAMEI_COMPOUNDRENAME)
+
 #ifdef KERNEL
 /*
  * namei operational modifier flags, stored in ni_cnd.flags
@@ -155,7 +175,9 @@ struct nameidata {
 #define        AUDITVNPATH2    0x00200000 /* audit the path/vnode info */
 #define        USEDVP          0x00400000 /* start the lookup at ndp.ni_dvp */
 #define        CN_VOLFSPATH    0x00800000 /* user path was a volfs style path */
+#ifndef __LP64__
 #define FSNODELOCKHELD 0x01000000
+#endif /* __LP64__ */
 #define UNIONCREATED   0x02000000 /* union fs creation of vnode */
 #if NAMEDRSRCFORK
 #define CN_WANTSRSRCFORK 0x04000000
@@ -167,21 +189,42 @@ struct nameidata {
 /*
  * Initialization of an nameidata structure.
  */
-#define NDINIT(ndp, op, flags, segflg, namep, ctx) { \
+
+#if CONFIG_TRIGGERS
+/* Note: vnode triggers require more precise path operation (ni_op) */ 
+
+#define NDINIT(ndp, op, pop, flags, segflg, namep, ctx) { \
        (ndp)->ni_cnd.cn_nameiop = op; \
+       (ndp)->ni_op = pop; \
        (ndp)->ni_cnd.cn_flags = flags; \
        if ((segflg) == UIO_USERSPACE) { \
                (ndp)->ni_segflg = ((IS_64BIT_PROCESS(vfs_context_proc(ctx))) ? UIO_USERSPACE64 : UIO_USERSPACE32); \
        } \
-       else if ((segflg) == UIO_SYSSPACE) { \
-               (ndp)->ni_segflg = UIO_SYSSPACE32; \
+       else { \
+               (ndp)->ni_segflg = segflg; \
+       } \
+       (ndp)->ni_dirp = namep; \
+       (ndp)->ni_cnd.cn_context = ctx; \
+       (ndp)->ni_flag = 0; \
+       (ndp)->ni_cnd.cn_ndp = (ndp); \
+}
+#else
+#define NDINIT(ndp, op, _unused_, flags, segflg, namep, ctx) { \
+       (ndp)->ni_cnd.cn_nameiop = op; \
+       (ndp)->ni_cnd.cn_flags = flags; \
+       if ((segflg) == UIO_USERSPACE) { \
+               (ndp)->ni_segflg = ((IS_64BIT_PROCESS(vfs_context_proc(ctx))) ? UIO_USERSPACE64 : UIO_USERSPACE32); \
        } \
        else { \
                (ndp)->ni_segflg = segflg; \
        } \
        (ndp)->ni_dirp = namep; \
        (ndp)->ni_cnd.cn_context = ctx; \
+       (ndp)->ni_flag = 0; \
+       (ndp)->ni_cnd.cn_ndp = (ndp); \
 }
+#endif /* CONFIG_TRIGGERS */
+
 #endif /* KERNEL */
 
 /*
@@ -211,21 +254,25 @@ struct    namecache {
 
 int    namei(struct nameidata *ndp);
 void   nameidone(struct nameidata *);
+void   namei_unlock_fsnode(struct nameidata *ndp);
 int    lookup(struct nameidata *ndp);
 int    relookup(struct vnode *dvp, struct vnode **vpp,
                struct componentname *cnp);
+void   lookup_compound_vnop_post_hook(int error, vnode_t dvp, vnode_t vp, struct nameidata *ndp, int did_create);
 
 /*
  * namecache function prototypes
  */
 void    cache_purgevfs(mount_t mp);
 int            cache_lookup_path(struct nameidata *ndp, struct componentname *cnp, vnode_t dp,
-                         vfs_context_t context, int *trailing_slash, int *dp_authorized);
+                         vfs_context_t context, int *dp_authorized, vnode_t last_dp);
 
 void           vnode_cache_authorized_action(vnode_t vp, vfs_context_t context, kauth_action_t action);
 void           vnode_uncache_authorized_action(vnode_t vp, kauth_action_t action);
 boolean_t      vnode_cache_is_stale(vnode_t vp);
 boolean_t      vnode_cache_is_authorized(vnode_t vp, vfs_context_t context, kauth_action_t action);
+int            lookup_validate_creation_path(struct nameidata *ndp);
+int            namei_compound_available(vnode_t dp, struct nameidata *ndp);
 
 #endif /* KERNEL */