/*
- * Copyright (c) 2000-2007 Apple Inc. All rights reserved.
+ * Copyright (c) 2000-2014 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
- *
+ *
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* unlawful or unlicensed copies of an Apple operating system, or to
* circumvent, violate, or enable the circumvention or violation of, any
* terms of an Apple operating system software license agreement.
- *
+ *
* Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this file.
- *
+ *
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
- *
+ *
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
*/
#ifndef _SYS_NAMEI_H_
-#define _SYS_NAMEI_H_
+#define _SYS_NAMEI_H_
#include <sys/appleapiopts.h>
#ifdef KERNEL
-#define LOCKLEAF 0x0004 /* lock inode on return */
-#define LOCKPARENT 0x0008 /* want parent vnode returned */
-#define WANTPARENT 0x0010 /* want parent vnode returned */
+#define LOCKLEAF 0x0004 /* lock inode on return */
+#define LOCKPARENT 0x0008 /* want parent vnode returned */
+#define WANTPARENT 0x0010 /* want parent vnode returned */
+
+#ifdef KERNEL_PRIVATE
+#define CN_SECLUDE_RENAME 0x10000000 /*rename iff ￢(hard-linked ∨ opened ∨ mmaped)*/
+#define CN_RAW_ENCRYPTED 0x80000000 /* Look-up is for RO raw encrypted access. */
#endif
+#endif // KERNEL
#ifdef BSD_KERNEL_PRIVATE
/* VFS Supports "/..namedfork/rsrc" access. */
-#define NAMEDRSRCFORK NAMEDSTREAMS
+#define NAMEDRSRCFORK NAMEDSTREAMS
#include <sys/queue.h>
#include <sys/mount.h>
#include <sys/filedesc.h>
-#define PATHBUFLEN 256
+#define PATHBUFLEN 256
/*
* Encapsulation of namei parameters.
/*
* Arguments to namei/lookup.
*/
- user_addr_t ni_dirp; /* pathname pointer */
- enum uio_seg ni_segflg; /* location of pathname */
+ 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.
*/
- struct vnode *ni_startdir; /* starting directory */
- struct vnode *ni_rootdir; /* logical root directory */
- struct vnode *ni_usedvp; /* directory passed in via USEDVP */
+ struct vnode *ni_startdir; /* starting directory */
+ struct vnode *ni_rootdir; /* logical root directory */
+ struct vnode *ni_usedvp; /* directory passed in via USEDVP */
/*
* Results: returned from/manipulated by lookup
*/
- struct vnode *ni_vp; /* vnode of result */
- struct vnode *ni_dvp; /* vnode of intermediate directory */
+ struct vnode *ni_vp; /* vnode of result */
+ struct vnode *ni_dvp; /* vnode of intermediate directory */
/*
* Shared between namei and lookup/commit routines.
*/
- u_int ni_pathlen; /* remaining chars in path */
- char *ni_next; /* next location in pathname */
- char ni_pathbuf[PATHBUFLEN];
- u_long ni_loopcnt; /* count of symlinks encountered */
+ u_int ni_pathlen; /* remaining chars in path */
+ char *ni_next; /* next location in pathname */
+ char ni_pathbuf[PATHBUFLEN];
+ 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 0x00000020 /* name must not be left in cache */
-#define NOFOLLOW 0x00000000 /* do not follow symbolic links (pseudo) */
+#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 */
+#define SHAREDLEAF 0x00000080 /* OK to have shared leaf lock */
+#define MODMASK 0x100000fc /* mask of operational modifiers */
/*
* Namei parameter descriptors.
*
* 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 DONOTAUTH 0x00000800 /* do not authorize during lookup */
-#define SAVESTART 0x00001000 /* save starting directory */
+#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 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 ISSYMLINK 0x00010000 /* symlink needs interpretation */
/* 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 CN_VOLFSPATH 0x00800000 /* user path was a volfs style path */
-#define FSNODELOCKHELD 0x01000000
-#define UNIONCREATED 0x02000000 /* union fs creation of vnode */
+#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 CN_VOLFSPATH 0x00800000 /* user path was a volfs style path */
+#define CN_FIRMLINK_NOFOLLOW 0x01000000 /* Do not follow firm links */
+#define UNIONCREATED 0x02000000 /* union fs creation of vnode */
#if NAMEDRSRCFORK
#define CN_WANTSRSRCFORK 0x04000000
#define CN_ALLOWRSRCFORK 0x08000000
+#endif // NAMEDRSRCFORK
+// CN_SECLUDE_RENAME is defined above as 0x10000000 (SPI)
+#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
-/* public NOTRIGGER 0x10000000 see vnode.h */
-#define CN_NBMOUNTLOOK 0x20000000 /* do not block for cross mount lookups */
+// CN_RAW_ENCRYPTED is defined above as 0x80000000 (SPI)
/*
* 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); \
+ (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_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 */
/*
* This structure describes the elements in the cache of recent
* names looked up by namei.
*/
-
-#define NCHASHMASK 0x7fffffff
-
-struct namecache {
- TAILQ_ENTRY(namecache) nc_entry; /* chain of all entries */
- LIST_ENTRY(namecache) nc_hash; /* hash chain */
- LIST_ENTRY(namecache) nc_child; /* chain of ncp's that are children of a vp */
- union {
- LIST_ENTRY(namecache) nc_link; /* chain of ncp's that 'name' a vp */
- TAILQ_ENTRY(namecache) nc_negentry; /* chain of ncp's that 'name' a vp */
+struct namecache {
+ TAILQ_ENTRY(namecache) nc_entry; /* chain of all entries */
+ TAILQ_ENTRY(namecache) nc_child; /* chain of ncp's that are children of a vp */
+ union {
+ LIST_ENTRY(namecache) nc_link; /* chain of ncp's that 'name' a vp */
+ TAILQ_ENTRY(namecache) nc_negentry; /* chain of ncp's that 'name' a vp */
} nc_un;
- vnode_t nc_dvp; /* vnode of parent of name */
- vnode_t nc_vp; /* vnode the name refers to */
- unsigned int nc_whiteout:1, /* name has whiteout applied */
- nc_hashval:31; /* hashval of stringname */
- const char *nc_name; /* pointer to segment name in string cache */
+ LIST_ENTRY(namecache) nc_hash; /* hash chain */
+ vnode_t nc_dvp; /* vnode of parent of name */
+ vnode_t nc_vp; /* vnode the name refers to */
+ unsigned int nc_hashval; /* hashval of stringname */
+ const char *nc_name; /* pointer to segment name in string cache */
};
#ifdef KERNEL
-int namei(struct nameidata *ndp);
-void nameidone(struct nameidata *);
-int lookup(struct nameidata *ndp);
-int relookup(struct vnode *dvp, struct vnode **vpp,
- struct componentname *cnp);
+int namei(struct nameidata *ndp);
+void nameidone(struct nameidata *);
+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);
+void kdebug_lookup(struct vnode *dp, struct componentname *cnp);
/*
* 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);
+int cache_lookup_path(struct nameidata *ndp, struct componentname *cnp, vnode_t 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 */
/*
* Stats on usefulness of namei caches.
*/
-struct nchstats {
- long ncs_goodhits; /* hits that we can really use */
- long ncs_neghits; /* negative hits that we can use */
- long ncs_badhits; /* hits we must drop */
- long ncs_miss; /* misses */
- long ncs_pass2; /* names found with passes == 2 */
- long ncs_2passes; /* number of times we attempt it */
- long ncs_stolen;
- long ncs_enters;
- long ncs_deletes;
- long ncs_badvid;
+struct nchstats {
+ long ncs_goodhits; /* hits that we can really use */
+ long ncs_neghits; /* negative hits that we can use */
+ long ncs_badhits; /* hits we must drop */
+ long ncs_miss; /* misses */
+ long ncs_pass2; /* names found with passes == 2 */
+ long ncs_2passes; /* number of times we attempt it */
+ long ncs_stolen;
+ long ncs_enters;
+ long ncs_deletes;
+ long ncs_badvid;
};
#endif /* BSD_KERNEL_PRIVATE */
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