/*
- * Copyright (c) 2000-2003 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2014 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
#ifdef BSD_KERNEL_PRIVATE
+/* VFS Supports "/..namedfork/rsrc" access. */
+#define NAMEDRSRCFORK NAMEDSTREAMS
+
+
#include <sys/queue.h>
#include <sys/uio.h>
#include <sys/vnode.h>
/*
* 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.
*/
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 */
+#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 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 FSNODELOCKHELD 0x01000000
+#define CN_VOLFSPATH 0x00800000 /* user path was a volfs style path */
+#define UNIONCREATED 0x02000000 /* union fs creation of vnode */
+#if NAMEDRSRCFORK
+#define CN_WANTSRSRCFORK 0x04000000
+#define CN_ALLOWRSRCFORK 0x08000000
+#endif
+#if CONFIG_SECLUDED_RENAME
+#ifdef BSD_KERNEL_PRIVATE
+#define CN_SECLUDE_RENAME 0x10000000 /*rename iff ￢(hard-linked ∨ opened ∨ mmaped)*/
+#endif
+#endif
+#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.
*/
-#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 */
/*
* This structure describes the elements in the cache of recent
* names looked up by namei.
*/
-
-#define NCHNAMLEN 31 /* maximum name segment length we bother with */
-#define NCHASHMASK 0x7fffffff
-
struct namecache {
TAILQ_ENTRY(namecache) nc_entry; /* chain of all entries */
LIST_ENTRY(namecache) nc_hash; /* hash chain */
} 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 */
- char * nc_name; /* pointer to segment name in string cache */
+ unsigned int nc_hashval; /* hashval of stringname */
+ const char *nc_name; /* pointer to segment name in string cache */
};
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,
- 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 */
* Stats on usefulness of namei caches.
*/
struct nchstats {
- long ncs_negtotal;
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 */
projects / apple / xnu.git / blobdiff