xnu-2422.115.4.tar.gz

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

diff --git a/bsd/sys/namei.h b/bsd/sys/namei.h
index 5aa2f701a0dda48c7e8b5629f5d71b6379b0d68c..9ea13c01e008eaab699e8ba0a30e1c56ccd6eff9 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) 2000-2011 Apple Inc. All rights reserved.

  *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * 
  *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * 


@@ -90,12 +90,15 @@
 /*
  * Encapsulation of namei parameters.
  */
 /*
  * 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 */
        /*
         * 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.
         */
        /*
         * Arguments to lookup.
         */


@@ -116,8 +119,25 @@ struct nameidata {
        u_long  ni_loopcnt;             /* count of symlinks encountered */
 
        struct componentname ni_cnd;
        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
 #ifdef KERNEL
 /*
  * namei operational modifier flags, stored in ni_cnd.flags


@@ -155,9 +175,6 @@ 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 */
 #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
 #define UNIONCREATED   0x02000000 /* union fs creation of vnode */
 #if NAMEDRSRCFORK
 #define CN_WANTSRSRCFORK 0x04000000


@@ -165,11 +182,34 @@ struct nameidata {
 #endif
 /* public NOTRIGGER            0x10000000    see vnode.h */
 #define CN_NBMOUNTLOOK 0x20000000 /* do not block for cross mount lookups */
 #endif
 /* public NOTRIGGER            0x10000000    see vnode.h */
 #define CN_NBMOUNTLOOK 0x20000000 /* do not block for cross mount lookups */

+#ifdef BSD_KERNEL_PRIVATE
+#define CN_SKIPNAMECACHE       0x40000000      /* skip cache during lookup(), allow FS to handle all components */
+#endif

 
 /*
  * Initialization of an nameidata structure.
  */
 
 /*
  * 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 { \
+               (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_cnd.cn_nameiop = op; \
        (ndp)->ni_cnd.cn_flags = flags; \
        if ((segflg) == UIO_USERSPACE) { \


@@ -180,7 +220,11 @@ struct nameidata {
        } \
        (ndp)->ni_dirp = namep; \
        (ndp)->ni_cnd.cn_context = ctx; \
        } \
        (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 */
 
 /*
 #endif /* KERNEL */
 
 /*


@@ -213,18 +257,22 @@ void      nameidone(struct nameidata *);
 int    lookup(struct nameidata *ndp);
 int    relookup(struct vnode *dvp, struct vnode **vpp,
                struct componentname *cnp);
 int    lookup(struct nameidata *ndp);
 int    relookup(struct vnode *dvp, struct vnode **vpp,
                struct componentname *cnp);

+int    lookup_traverse_union(vnode_t dvp, vnode_t *new_dvp, vfs_context_t ctx);
+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,
 
 /*
  * 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, vnode_t last_dp);
+                         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);
 
 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 */
 
 
 #endif /* KERNEL */