X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/89b3af67bb32e691275bf6fa803d1834b2284115..7ee9d059c4eecf68ae4f8b0fb99ae2471eda79af:/bsd/sys/namei.h

diff --git a/bsd/sys/namei.h b/bsd/sys/namei.h
index 945efb2d5..56d3ecf13 100644
--- a/bsd/sys/namei.h
+++ b/bsd/sys/namei.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000-2003 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2010 Apple Inc. All rights reserved.
  *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * 
@@ -75,6 +75,10 @@
 
 #ifdef BSD_KERNEL_PRIVATE
 
+/* VFS Supports "/..namedfork/rsrc" access. */
+#define NAMEDRSRCFORK		NAMEDSTREAMS
+
+
 #include <sys/queue.h>
 #include <sys/uio.h>
 #include <sys/vnode.h>
@@ -86,12 +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.
 	 */
@@ -112,16 +119,36 @@ 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
+ * Also includes LOCKLEAF, LOCKPARENT, and WANTPARENT flags, defined above.
  */
-#define	NOCACHE		0x0020	/* name must not be left in cache */
-#define	NOFOLLOW	0x0000	/* do not follow symbolic links (pseudo) */
-#define	SHAREDLEAF	0x0080	/* OK to have shared leaf lock */
-#define	MODMASK		0x00fc	/* mask of operational modifiers */
+#define	NOCACHE		0x00000020 /* name must not be left in cache */
+#define	NOFOLLOW	0x00000000 /* do not follow symbolic links (pseudo) */
+/* public FOLLOW	0x00000040    see vnode.h */
+#define	SHAREDLEAF	0x00000080 /* OK to have shared leaf lock */
+/* public NOTRIGGER	0x10000000    see vnode.h */
+#define	MODMASK		0x100000fc /* mask of operational modifiers */
 /*
  * Namei parameter descriptors.
  *
@@ -131,38 +158,73 @@ struct nameidata {
  * name being sought. The caller is responsible for releasing the
  * buffer and for vrele'ing ni_startdir.
  */
+#define	SAVENAME	0          /* save pathanme buffer ***obsolete */
 #define	NOCROSSMOUNT	0x00000100 /* do not cross mount points */
 #define	RDONLY		0x00000200 /* lookup with read-only semantics */
 #define	HASBUF		0x00000400 /* has allocated pathname buffer */
-#define	SAVENAME	0x00000800 /* save pathanme buffer */
+#define DONOTAUTH	0x00000800 /* do not authorize during lookup */
 #define	SAVESTART	0x00001000 /* save starting directory */
+/* public ISDOTDOT	0x00002000    see vnode.h */
+/* public MAKEENTRY	0x00004000    see vnode.h */
+/* public ISLASTCN	0x00008000    see vnode.h */
 #define	ISSYMLINK	0x00010000 /* symlink needs interpretation */
-#define DONOTAUTH	0x00020000 /* do not authorize during lookup */
+/* public ISWHITEOUT	0x00020000    see vnode.h */
+/* public DOWHITEOUT	0x00040000    see vnode.h */
 #define	WILLBEDIR	0x00080000 /* new files will be dirs; allow trailing / */
 #define	AUDITVNPATH1	0x00100000 /* audit the path/vnode info */
 #define	AUDITVNPATH2	0x00200000 /* audit the path/vnode info */
 #define	USEDVP		0x00400000 /* start the lookup at ndp.ni_dvp */
-#define	PARAMASK	0x003fff00 /* mask of parameter descriptors */
+#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
+#define CN_ALLOWRSRCFORK 0x08000000
+#endif
+/* public NOTRIGGER		0x10000000    see vnode.h */
+#define CN_NBMOUNTLOOK	0x20000000 /* do not block for cross mount lookups */
 
 /*
  * 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 */
 
 /*
@@ -170,7 +232,6 @@ struct nameidata {
  * names looked up by namei.
  */
 
-#define	NCHNAMLEN	31	/* maximum name segment length we bother with */
 #define NCHASHMASK	0x7fffffff
 
 struct	namecache {
@@ -185,7 +246,7 @@ struct	namecache {
 	vnode_t			nc_vp;		/* vnode the name refers to */
         unsigned int		nc_whiteout:1,	/* name has whiteout applied */
 	                        nc_hashval:31;	/* hashval of stringname */
-	char		*	nc_name;	/* pointer to segment name in string cache */
+	const char		*nc_name;	/* pointer to segment name in string cache */
 };
 
 
@@ -193,21 +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_credentials(vnode_t vp, vfs_context_t context);
-void	vnode_uncache_credentials(vnode_t vp);
-int		reverse_lookup(vnode_t start_vp, vnode_t *lookup_vpp, 
-				struct filedesc *fdp, vfs_context_t context, int *dp_authorized);
+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 */