FreeBSD kernel kern code: kern/vfs_lookup.c File Reference

FreeBSD kernel kern code

#include <sys/cdefs.h>
#include "opt_capsicum.h"
#include "opt_kdtrace.h"
#include "opt_ktrace.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/capability.h>
#include <sys/fcntl.h>
#include <sys/jail.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/namei.h>
#include <sys/vnode.h>
#include <sys/mount.h>
#include <sys/filedesc.h>
#include <sys/proc.h>
#include <sys/sdt.h>
#include <sys/syscallsubr.h>
#include <sys/sysctl.h>
#include <security/audit/audit.h>
#include <security/mac/mac_framework.h>
#include <vm/uma.h>

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Macros
#define	NAMEI_DIAGNOSTIC 1

Functions
	__FBSDID ("$BSDSUniX$")

	SDT_PROVIDER_DECLARE (vfs)

	SDT_PROBE_DEFINE3 (vfs, namei, lookup, entry,"struct vnode ","char ","unsigned long")

	SDT_PROBE_DEFINE2 (vfs, namei, lookup, return,"int","struct vnode *")

static void	nameiinit (void *dummy __unused)

	SYSINIT (vfs, SI_SUB_VFS, SI_ORDER_SECOND, nameiinit, NULL)

	SYSCTL_INT (_vfs, OID_AUTO, lookup_shared, CTLFLAG_RW,&lookup_shared, 0,"Enables/Disables shared locks for path name translation")

	TUNABLE_INT ("vfs.lookup_shared",&lookup_shared)

static void	namei_cleanup_cnp (struct componentname *cnp)

int	namei (struct nameidata *ndp)

static int	compute_cn_lkflags (struct mount *mp, int lkflags, int cnflags)

static __inline int	needs_exclusive_leaf (struct mount *mp, int flags)

int	lookup (struct nameidata *ndp)

int	relookup (struct vnode dvp, struct vnode vpp, struct componentname cnp)

void	NDFREE (struct nameidata *ndp, const u_int flags)

int	kern_alternate_path (struct thread td, const char prefix, const char path, enum uio_seg pathseg, char *pathbuf, int create, int dirfd)

Variables
uma_zone_t	namei_zone

static struct vnode *	vp_crossmp

static int	lookup_shared = 1

Macro Definition Documentation

#define NAMEI_DIAGNOSTIC 1

Definition at line 69 of file vfs_lookup.c.

Function Documentation

__FBSDID ( "$BSDSUniX$" )

static int compute_cn_lkflags	(	struct mount *	mp,
		int	lkflags,
		int	cnflags
	)

static

Definition at line 386 of file vfs_lookup.c.

Referenced by lookup().

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int kern_alternate_path	(	struct thread *	td,
		const char *	prefix,
		const char *	path,
		enum uio_seg	pathseg,
		char **	pathbuf,
		int	create,
		int	dirfd
	)

Definition at line 1150 of file vfs_lookup.c.

References buf, free(), malloc(), namei(), NDFREE(), and vrele().

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int lookup ( struct nameidata * ndp )

Definition at line 473 of file vfs_lookup.c.

References compute_cn_lkflags(), lookup_shared, needs_exclusive_leaf(), panic(), pr, printf(), rootvnode, vfs_busy(), vfs_unbusy(), vp_crossmp, vput(), vref(), and vrele().

Referenced by cache_lookup_times(), and namei().

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int namei ( struct nameidata * ndp )

Definition at line 135 of file vfs_lookup.c.

References fgetvp_rights(), Giant, lookup(), lookup_shared, namei_cleanup_cnp(), namei_zone, vput(), and vrele().

Referenced by do_execve(), kern_accessat(), kern_alternate_path(), kern_chdir(), kern_fchmodat(), kern_fchownat(), kern_jail_set(), kern_linkat(), kern_lutimes(), kern_mkdirat(), kern_mkfifoat(), kern_mknodat(), kern_pathconf(), kern_readlinkat(), kern_renameat(), kern_rmdirat(), kern_statat_vnhook(), kern_statfs(), kern_symlinkat(), kern_truncate(), kern_unlinkat(), kern_utimesat(), load_file(), parse_mount_dev_present(), sys___acl_aclcheck_file(), sys___acl_aclcheck_link(), sys___acl_delete_file(), sys___acl_delete_link(), sys___acl_get_file(), sys___acl_get_link(), sys___acl_set_file(), sys___acl_set_link(), sys_chflags(), sys_chroot(), sys_extattr_delete_file(), sys_extattr_delete_link(), sys_extattr_get_file(), sys_extattr_get_link(), sys_extattr_list_file(), sys_extattr_list_link(), sys_extattr_set_file(), sys_extattr_set_link(), sys_extattrctl(), sys_getfh(), sys_lchflags(), sys_lgetfh(), sys_quotactl(), sys_revoke(), sys_undelete(), sys_unmount(), uipc_bind(), unp_connect(), vfs_domount(), vfs_mountroot_shuffle(), vn_open_cred(), and vn_path_to_global_path().

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static void namei_cleanup_cnp ( struct componentname * cnp )

static

Definition at line 125 of file vfs_lookup.c.

References namei_zone.

Referenced by namei().

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static void nameiinit ( void *dummy __unused )

static

Definition at line 87 of file vfs_lookup.c.

References getnewvnode(), namei_zone, and vp_crossmp.

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void NDFREE	(	struct nameidata *	ndp,
		const u_int	flags
	)

Definition at line 1091 of file vfs_lookup.c.

References namei_zone, vput(), and vrele().

Referenced by alq_open_flags(), coredump(), do_execve(), expand_name(), kern_accessat(), kern_alternate_path(), kern_chdir(), kern_fchmodat(), kern_fchownat(), kern_jail_set(), kern_linkat(), kern_lutimes(), kern_mkdirat(), kern_mkfifoat(), kern_mknodat(), kern_openat(), kern_pathconf(), kern_readlinkat(), kern_renameat(), kern_rmdirat(), kern_statat_vnhook(), kern_statfs(), kern_symlinkat(), kern_truncate(), kern_unlinkat(), kern_utimesat(), link_elf_ctf_get(), link_elf_load_file(), linker_hints_lookup(), linker_lookup_file(), load_file(), parse_mount_dev_present(), sys___acl_aclcheck_file(), sys___acl_aclcheck_link(), sys___acl_delete_file(), sys___acl_delete_link(), sys___acl_get_file(), sys___acl_get_link(), sys___acl_set_file(), sys___acl_set_link(), sys_acct(), sys_chflags(), sys_chroot(), sys_extattr_delete_file(), sys_extattr_delete_link(), sys_extattr_get_file(), sys_extattr_get_link(), sys_extattr_list_file(), sys_extattr_list_link(), sys_extattr_set_file(), sys_extattr_set_link(), sys_extattrctl(), sys_getfh(), sys_ktrace(), sys_lchflags(), sys_lgetfh(), sys_quotactl(), sys_revoke(), sys_undelete(), sys_unmount(), uipc_bind(), unp_connect(), vfs_domount(), vfs_mountroot_readconf(), vfs_mountroot_shuffle(), vn_open_cred(), vn_path_to_global_path(), and vop_stdvptocnp().

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static __inline int needs_exclusive_leaf	(	struct mount *	mp,
		int	flags
	)

static

Definition at line 400 of file vfs_lookup.c.

Referenced by lookup().

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int relookup	(	struct vnode *	dvp,
		struct vnode **	vpp,
		struct componentname *	cnp
	)

Definition at line 957 of file vfs_lookup.c.

References panic(), printf(), vput(), and vrele().

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SDT_PROBE_DEFINE2	(	vfs	,
		namei	,
		lookup	,
		return	,
		"int"	,
		"struct vnode *"
	)

SDT_PROBE_DEFINE3	(	vfs	,
		namei	,
		lookup	,
		entry	,
		"struct vnode *"	,
		"char *"	,
		"unsigned long"
	)

SDT_PROVIDER_DECLARE ( vfs )

SYSCTL_INT	(	_vfs	,
		OID_AUTO	,
		lookup_shared	,
		CTLFLAG_RW	,
		&	lookup_shared,
		0	,
		"Enables/Disables shared locks for path name translation"
	)

SYSINIT	(	vfs	,
		SI_SUB_VFS	,
		SI_ORDER_SECOND	,
		nameiinit	,
		NULL
	)

TUNABLE_INT	(	"vfs.lookup_shared"	,
		&	lookup_shared
	)

Variable Documentation

int lookup_shared = 1

static

Definition at line 99 of file vfs_lookup.c.

Referenced by lookup(), and namei().

uma_zone_t namei_zone

Definition at line 80 of file vfs_lookup.c.

Referenced by kern_symlinkat(), namei(), namei_cleanup_cnp(), nameiinit(), and NDFREE().

struct vnode* vp_crossmp

static

Definition at line 84 of file vfs_lookup.c.

Referenced by lookup(), and nameiinit().

kern
vfs_lookup.c
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