#include <sys/cdefs.h>
#include <sys/param.h>
#include <sys/conf.h>
#include <sys/fcntl.h>
#include <sys/jail.h>
#include <sys/kernel.h>
#include <sys/libkern.h>
#include <sys/malloc.h>
#include <sys/mount.h>
#include <sys/mutex.h>
#include <sys/namei.h>
#include <sys/priv.h>
#include <sys/proc.h>
#include <sys/filedesc.h>
#include <sys/reboot.h>
#include <sys/sbuf.h>
#include <sys/syscallsubr.h>
#include <sys/sysproto.h>
#include <sys/sx.h>
#include <sys/sysctl.h>
#include <sys/sysent.h>
#include <sys/systm.h>
#include <sys/vnode.h>
#include <vm/uma.h>
#include <geom/geom.h>
#include <machine/stdarg.h>
#include <security/audit/audit.h>
#include <security/mac/mac_framework.h>

Include dependency graph for vfs_mount.c:

Data Structures
struct	mount_args

struct	unmount_args

struct	mntaarg

struct	mntarg

Macros
#define	VFS_MOUNTARG_SIZE_MAX (1024 * 64)

Functions
	__FBSDID ("$BSDSUniX$")

static int	vfs_domount (struct thread td, const char fstype, char fspath, uint64_t fsflags, struct vfsoptlist *optlist)

static void	free_mntarg (struct mntarg *ma)

	SYSCTL_INT (_vfs, OID_AUTO, usermount, CTLFLAG_RW,&usermount, 0,"Unprivileged users may mount and unmount file systems")

	MALLOC_DEFINE (M_MOUNT,"mount","vfs mount structure")

	MTX_SYSINIT (mountlist,&mountlist_mtx,"mountlist", MTX_DEF)

static int	mount_init (void *mem, int size, int flags)

static void	mount_fini (void *mem, int size)

static void	vfs_mount_init (void *dummy __unused)

	SYSINIT (vfs_mount, SI_SUB_VFS, SI_ORDER_ANY, vfs_mount_init, NULL)

static void	vfs_freeopt (struct vfsoptlist opts, struct vfsopt opt)

void	vfs_freeopts (struct vfsoptlist *opts)

void	vfs_deleteopt (struct vfsoptlist opts, const char name)

static int	vfs_isopt_ro (const char *opt)

static int	vfs_isopt_rw (const char *opt)

static int	vfs_equalopts (const char opt1, const char opt2)

static void	vfs_sanitizeopts (struct vfsoptlist *opts)

int	vfs_buildopts (struct uio auio, struct vfsoptlist *options)

static void	vfs_mergeopts (struct vfsoptlist toopts, struct vfsoptlist oldopts)

int	sys_nmount (struct thread td, struct nmount_args uap)

void	vfs_ref (struct mount *mp)

void	vfs_rel (struct mount *mp)

struct mount *	vfs_mount_alloc (struct vnode vp, struct vfsconf vfsp, const char fspath, struct ucred cred)

void	vfs_mount_destroy (struct mount *mp)

int	vfs_donmount (struct thread td, uint64_t fsflags, struct uio fsoptions)

int	sys_mount (struct thread td, struct mount_args uap)

static int	vfs_domount_first (struct thread td, struct vfsconf vfsp, char fspath, struct vnode vp, uint64_t fsflags, struct vfsoptlist **optlist)

static int	vfs_domount_update (struct thread td, struct vnode vp, uint64_t fsflags, struct vfsoptlist **optlist)

int	sys_unmount (struct thread td, struct unmount_args uap)

int	dounmount (struct mount mp, int flags, struct thread td)

void	vfs_mount_error (struct mount mp, const char fmt,...)

void	vfs_opterror (struct vfsoptlist opts, const char fmt,...)

int	vfs_filteropt (struct vfsoptlist opts, const char *legal)

int	vfs_getopt (struct vfsoptlist opts, const char name, void *buf, int len)

int	vfs_getopt_pos (struct vfsoptlist opts, const char name)

char *	vfs_getopts (struct vfsoptlist opts, const char name, int *error)

int	vfs_flagopt (struct vfsoptlist opts, const char name, uint64_t *w, uint64_t val)

int	vfs_scanopt (struct vfsoptlist opts, const char name, const char *fmt,...)

int	vfs_setopt (struct vfsoptlist opts, const char name, void *value, int len)

int	vfs_setopt_part (struct vfsoptlist opts, const char name, void *value, int len)

int	vfs_setopts (struct vfsoptlist opts, const char name, const char *value)

int	vfs_copyopt (struct vfsoptlist opts, const char name, void *dest, int len)

	MALLOC_DECLARE (M_VNODE_MARKER)

struct vnode *	__mnt_vnode_next (struct vnode *mvp, struct mount mp)

struct vnode *	__mnt_vnode_first (struct vnode *mvp, struct mount mp)

void	__mnt_vnode_markerfree (struct vnode *mvp, struct mount mp)

int	__vfs_statfs (struct mount mp, struct statfs sbp)

void	vfs_mountedfrom (struct mount mp, const char from)

struct mntarg *	mount_argb (struct mntarg ma, int flag, const char name)

struct mntarg *	mount_argf (struct mntarg ma, const char name, const char *fmt,...)

struct mntarg *	mount_argsu (struct mntarg ma, const char name, const void *val, int len)

struct mntarg *	mount_arg (struct mntarg ma, const char name, const void *val, int len)

int	kernel_mount (struct mntarg *ma, uint64_t flags)

int	kernel_vmount (int flags,...)

void	vfs_oexport_conv (const struct oexport_args oexp, struct export_args exp)

Variables
static int	usermount = 0

static uma_zone_t	mount_zone

struct mntlist	mountlist = TAILQ_HEAD_INITIALIZER(mountlist)

struct mtx	mountlist_mtx

static const char *	global_opts []

Macro Definition Documentation

#define VFS_MOUNTARG_SIZE_MAX (1024 * 64)

Definition at line 71 of file vfs_mount.c.

Referenced by vfs_buildopts().

Function Documentation

__FBSDID ( "$BSDSUniX$" )

struct vnode* __mnt_vnode_first	(	struct vnode **	mvp,
		struct mount *	mp
	)

Definition at line 1708 of file vfs_mount.c.

References free(), and malloc().

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void __mnt_vnode_markerfree	(	struct vnode **	mvp,
		struct mount *	mp
	)

Definition at line 1751 of file vfs_mount.c.

References free().

Referenced by __mnt_vnode_next().

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struct vnode* __mnt_vnode_next	(	struct vnode **	mvp,
		struct mount *	mp
	)

Definition at line 1681 of file vfs_mount.c.

References __mnt_vnode_markerfree(), kern_yield(), and should_yield().

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int __vfs_statfs	(	struct mount *	mp,
		struct statfs *	sbp
	)

Definition at line 1769 of file vfs_mount.c.

int dounmount	(	struct mount *	mp,
		int	flags,
		struct thread *	td
	)

Definition at line 1224 of file vfs_mount.c.

References cache_purgevfs(), Giant, mountcheckdirs(), mountlist, mountlist_mtx, rootvnode, vdrop(), vfs_allocate_syncvnode(), vfs_deallocate_syncvnode(), vfs_event_signal(), vfs_mount_destroy(), vfs_msync(), vfs_setpublicfs(), vfs_suser(), vholdl(), vn_finished_write(), vn_start_write(), vput(), vref(), vrele(), and wakeup().

Referenced by sys_unmount(), and vfs_unmountall().

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static void free_mntarg ( struct mntarg * ma )

static

Definition at line 1929 of file vfs_mount.c.

References free(), and mntarg::v.

Referenced by kernel_mount().

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int kernel_mount	(	struct mntarg *	ma,
		uint64_t	flags
	)

Definition at line 1946 of file vfs_mount.c.

References mntarg::error, free_mntarg(), mntarg::len, mntarg::v, and vfs_donmount().

Referenced by kernel_vmount(), and parse_mount().

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int kernel_vmount	(	int	flags,
			...
	)

Definition at line 1970 of file vfs_mount.c.

References mntarg::error, kernel_mount(), and mount_arg().

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MALLOC_DECLARE ( M_VNODE_MARKER )

MALLOC_DEFINE	(	M_MOUNT	,
		"mount"	,
		"vfs mount structure"
	)

struct mntarg* mount_arg	(	struct mntarg *	ma,
		const char *	name,
		const void *	val,
		int	len
	)

Definition at line 1900 of file vfs_mount.c.

References mntarg::error, mntarg::len, malloc(), name, realloc(), and mntarg::v.

Referenced by kernel_vmount(), mount_argb(), mount_argsu(), parse_mount(), and parse_mountroot_options().

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struct mntarg* mount_argb	(	struct mntarg *	ma,
		int	flag,
		const char *	name
	)

Definition at line 1819 of file vfs_mount.c.

References mount_arg().

Referenced by sys_mount().

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struct mntarg* mount_argf	(	struct mntarg *	ma,
		const char *	name,
		const char *	fmt,
			...
	)

Definition at line 1832 of file vfs_mount.c.

References mntarg::error, mntarg::len, malloc(), name, realloc(), sbuf_data(), sbuf_delete(), sbuf_finish(), sbuf_len(), sbuf_vprintf(), and mntarg::v.

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struct mntarg* mount_argsu	(	struct mntarg *	ma,
		const char *	name,
		const void *	val,
		int	len
	)

Definition at line 1874 of file vfs_mount.c.

References mntarg::error, malloc(), and mount_arg().

Referenced by sys_mount().

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static void mount_fini	(	void *	mem,
		int	size
	)

static

Definition at line 117 of file vfs_mount.c.

References lockdestroy(), and mtx_destroy().

Referenced by vfs_mount_init().

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static int mount_init	(	void *	mem,
		int	size,
		int	flags
	)

static

Definition at line 106 of file vfs_mount.c.

References lockinit(), and mtx_init().

Referenced by vfs_mount_init().

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MTX_SYSINIT	(	mountlist	,
		&	mountlist_mtx,
		"mountlist"	,
		MTX_DEF
	)

int sys_mount	(	struct thread *	td,
		struct mount_args *	uap
	)

Definition at line 698 of file vfs_mount.c.

References mount_args::data, mntarg::error, mount_args::flags, free(), Giant, malloc(), mount_argb(), mount_argsu(), mount_args::path, mount_args::type, vfs_byname_kld(), and vfsconf.

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int sys_nmount	(	struct thread *	td,
		struct nmount_args *	uap
	)

Definition at line 367 of file vfs_mount.c.

References copyinuio(), free(), and vfs_donmount().

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int sys_unmount	(	struct thread *	td,
		struct unmount_args *	uap
	)

Definition at line 1131 of file vfs_mount.c.

References dounmount(), free(), Giant, jailed(), malloc(), mountlist, mountlist_mtx, namei(), NDFREE(), priv_check(), sscanf(), usermount, vn_path_to_global_path(), and vput().

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SYSCTL_INT	(	_vfs	,
		OID_AUTO	,
		usermount	,
		CTLFLAG_RW	,
		&	usermount,
		0	,
		"Unprivileged users may mount and unmount file systems"
	)

SYSINIT	(	vfs_mount	,
		SI_SUB_VFS	,
		SI_ORDER_ANY	,
		vfs_mount_init	,
		NULL
	)

int vfs_buildopts	(	struct uio *	auio,
		struct vfsoptlist **	options
	)

Definition at line 260 of file vfs_mount.c.

References malloc(), vfs_freeopts(), VFS_MOUNTARG_SIZE_MAX, and vfs_sanitizeopts().

Referenced by kern_jail_get(), kern_jail_set(), and vfs_donmount().

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int vfs_copyopt	(	struct vfsoptlist *	opts,
		const char *	name,
		void *	dest,
		int	len
	)

Definition at line 1649 of file vfs_mount.c.

Referenced by kern_jail_get(), kern_jail_set(), and vfs_domount_update().

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void vfs_deleteopt	(	struct vfsoptlist *	opts,
		const char *	name
	)

Definition at line 166 of file vfs_mount.c.

References vfs_freeopt().

Referenced by vfs_export().

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static int vfs_domount	(	struct thread *	td,
		const char *	fstype,
		char *	fspath,
		uint64_t	fsflags,
		struct vfsoptlist **	optlist
	)

static

Definition at line 1023 of file vfs_mount.c.

References free(), Giant, jailed(), malloc(), namei(), NDFREE(), priv_check(), usermount, vfs_byname(), vfs_byname_kld(), vfs_domount_first(), vfs_domount_update(), vfsconf, and vn_path_to_global_path().

Referenced by vfs_donmount().

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static int vfs_domount_first	(	struct thread *	td,
		struct vfsconf *	vfsp,
		char *	fspath,
		struct vnode *	vp,
		uint64_t	fsflags,
		struct vfsoptlist **	optlist
	)

static

Definition at line 766 of file vfs_mount.c.

References cache_purge(), Giant, mountcheckdirs(), mountlist, mountlist_mtx, panic(), priv_check_cred(), vfs_allocate_syncvnode(), vfs_event_signal(), vfs_freeopts(), vfs_mount_alloc(), vfs_mount_destroy(), vfs_unbusy(), vinvalbuf(), vput(), and vrele().

Referenced by vfs_domount().

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static int vfs_domount_update	(	struct thread *	td,
		struct vnode *	vp,
		uint64_t	fsflags,
		struct vfsoptlist **	optlist
	)

static

Definition at line 878 of file vfs_mount.c.

References flag, Giant, vfs_allocate_syncvnode(), vfs_busy(), vfs_copyopt(), vfs_deallocate_syncvnode(), vfs_export(), vfs_freeopts(), vfs_mergeopts(), vfs_suser(), vfs_unbusy(), vput(), and vrele().

Referenced by vfs_domount().

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int vfs_donmount	(	struct thread *	td,
		uint64_t	fsflags,
		struct uio *	fsoptions
	)

Definition at line 534 of file vfs_mount.c.

References free(), vfs_buildopts(), vfs_domount(), vfs_freeopt(), vfs_freeopts(), vfs_getopt(), and vfs_getopt_pos().

Referenced by kernel_mount(), and sys_nmount().

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static int vfs_equalopts	(	const char *	opt1,
		const char *	opt2
	)

static

Definition at line 201 of file vfs_mount.c.

References vfs_isopt_ro(), and vfs_isopt_rw().

Referenced by vfs_sanitizeopts().

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int vfs_filteropt	(	struct vfsoptlist *	opts,
		const char **	legal
	)

Definition at line 1416 of file vfs_mount.c.

References global_opts, printf(), and snprintf().

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int vfs_flagopt	(	struct vfsoptlist *	opts,
		const char *	name,
		uint64_t *	w,
		uint64_t	val
	)

Definition at line 1536 of file vfs_mount.c.

Referenced by kern_jail_set().

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static void vfs_freeopt	(	struct vfsoptlist *	opts,
		struct vfsopt *	opt
	)

static

Definition at line 142 of file vfs_mount.c.

References free().

Referenced by vfs_deleteopt(), vfs_donmount(), vfs_freeopts(), and vfs_sanitizeopts().

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void vfs_freeopts ( struct vfsoptlist * opts )

Definition at line 154 of file vfs_mount.c.

References free(), and vfs_freeopt().

Referenced by kern_jail_get(), kern_jail_set(), vfs_buildopts(), vfs_domount_first(), vfs_domount_update(), vfs_donmount(), and vfs_mount_destroy().

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int vfs_getopt	(	struct vfsoptlist *	opts,
		const char *	name,
		void **	buf,
		int *	len
	)

Definition at line 1474 of file vfs_mount.c.

Referenced by kern_jail_get(), kern_jail_set(), vfs_donmount(), vfs_mount_error(), and vfs_opterror().

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int vfs_getopt_pos	(	struct vfsoptlist *	opts,
		const char *	name
	)

Definition at line 1498 of file vfs_mount.c.

Referenced by kern_jail_get(), kern_jail_set(), and vfs_donmount().

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char* vfs_getopts	(	struct vfsoptlist *	opts,
		const char *	name,
		int *	error
	)

Definition at line 1515 of file vfs_mount.c.

static int vfs_isopt_ro ( const char * opt )

static

Definition at line 179 of file vfs_mount.c.

Referenced by vfs_equalopts().

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static int vfs_isopt_rw ( const char * opt )

static

Definition at line 189 of file vfs_mount.c.

Referenced by vfs_equalopts().

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static void vfs_mergeopts	(	struct vfsoptlist *	toopts,
		struct vfsoptlist *	oldopts
	)

static

Definition at line 344 of file vfs_mount.c.

References malloc(), and vfs_sanitizeopts().

Referenced by vfs_domount_update().

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struct mount* vfs_mount_alloc	(	struct vnode *	vp,
		struct vfsconf *	vfsp,
		const char *	fspath,
		struct ucred *	cred
	)

Definition at line 452 of file vfs_mount.c.

References crdup(), mount_zone, and vfs_busy().

Referenced by vfs_domount_first(), and vfs_mountroot_devfs().

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void vfs_mount_destroy ( struct mount * mp )

Definition at line 490 of file vfs_mount.c.

References crfree(), mount_zone, panic(), vfs_freeopts(), and wakeup().

Referenced by dounmount(), and vfs_domount_first().

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void vfs_mount_error	(	struct mount *	mp,
		const char *	fmt,
			...
	)

Definition at line 1375 of file vfs_mount.c.

References vfs_getopt(), and vsnprintf().

Referenced by vfs_hang_addrlist().

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static void vfs_mount_init ( void *dummy __unused )

static

Definition at line 127 of file vfs_mount.c.

References mount_fini(), mount_init(), and mount_zone.

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void vfs_mountedfrom	(	struct mount *	mp,
		const char *	from
	)

Definition at line 1780 of file vfs_mount.c.

Referenced by mqfs_mount().

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void vfs_oexport_conv	(	const struct oexport_args *	oexp,
		struct export_args *	exp
	)

Definition at line 1993 of file vfs_mount.c.

void vfs_opterror	(	struct vfsoptlist *	opts,
		const char *	fmt,
			...
	)

Definition at line 1392 of file vfs_mount.c.

References vfs_getopt(), and vsnprintf().

Referenced by kern_jail_get(), and kern_jail_set().

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void vfs_ref ( struct mount * mp )

Definition at line 429 of file vfs_mount.c.

Referenced by kern_fstatfs(), kern_statfs(), sys_fhopen(), sys_quotactl(), vfs_getvfs(), vn_vget_ino(), and vop_stdgetwritemount().

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void vfs_rel ( struct mount * mp )

Definition at line 439 of file vfs_mount.c.

Referenced by kern_fstatfs(), kern_statfs(), sys_fhopen(), sys_quotactl(), sysctl_vfs_ctl(), vfs_getnewfsid(), vn_start_secondary_write(), vn_vget_ino(), and vop_stdgetwritemount().

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static void vfs_sanitizeopts ( struct vfsoptlist * opts )

static

Definition at line 238 of file vfs_mount.c.

References vfs_equalopts(), and vfs_freeopt().

Referenced by vfs_buildopts(), and vfs_mergeopts().

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int vfs_scanopt	(	struct vfsoptlist *	opts,
		const char *	name,
		const char *	fmt,
			...
	)

Definition at line 1555 of file vfs_mount.c.

References vsscanf().

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int vfs_setopt	(	struct vfsoptlist *	opts,
		const char *	name,
		void *	value,
		int	len
	)

Definition at line 1580 of file vfs_mount.c.

Referenced by kern_jail_get().

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int vfs_setopt_part	(	struct vfsoptlist *	opts,
		const char *	name,
		void *	value,
		int	len
	)

Definition at line 1601 of file vfs_mount.c.

Referenced by kern_jail_get().

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int vfs_setopts	(	struct vfsoptlist *	opts,
		const char *	name,
		const char *	value
	)

Definition at line 1623 of file vfs_mount.c.

Referenced by kern_jail_get().

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Variable Documentation

const char* global_opts[]

static

Initial value:

= {
        "errmsg",
        "fstype",
        "fspath",
        "ro",
        "rw",
        "nosuid",
        "noexec",
        NULL
}

Definition at line 94 of file vfs_mount.c.

Referenced by vfs_filteropt().

uma_zone_t mount_zone

static

Definition at line 82 of file vfs_mount.c.

Referenced by vfs_mount_alloc(), vfs_mount_destroy(), and vfs_mount_init().

struct mntlist mountlist = TAILQ_HEAD_INITIALIZER(mountlist)

Definition at line 85 of file vfs_mount.c.

Referenced by dounmount(), kern_getfsstat(), kern_reboot(), set_rootvnode(), sys_sync(), sys_unmount(), vfs_busyfs(), vfs_domount_first(), vfs_getvfs(), vfs_mountroot(), vfs_mountroot_devfs(), vfs_mountroot_shuffle(), vfs_unmountall(), and vnlru_proc().

struct mtx mountlist_mtx

Definition at line 88 of file vfs_mount.c.

Referenced by dounmount(), kern_getfsstat(), sys_sync(), sys_unmount(), vfs_busy(), vfs_busyfs(), vfs_domount_first(), vfs_getvfs(), vfs_mountroot(), vfs_mountroot_devfs(), vfs_mountroot_shuffle(), and vnlru_proc().

int usermount = 0

static

Definition at line 77 of file vfs_mount.c.

Referenced by sys_unmount(), and vfs_domount().

Data Structures

Macros

Functions

Variables

Macro Definition Documentation

Function Documentation

Variable Documentation