#include <sys/cdefs.h>
#include <sys/param.h>
#include <sys/conf.h>
#include <sys/smp.h>
#include <sys/devctl.h>
#include <sys/eventhandler.h>
#include <sys/fcntl.h>
#include <sys/jail.h>
#include <sys/kernel.h>
#include <sys/ktr.h>
#include <sys/libkern.h>
#include <sys/limits.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/taskqueue.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	nmount_args

struct	mount_args

struct	unmount_args

struct	vfs_op_barrier_ipi

struct	mntaarg

struct	mntarg

Macros
#define	VFS_MOUNTARG_SIZE_MAX (1024 * 64)

#define	DEVCTL_LEN 1024

Functions
	__FBSDID ("$FreeBSD$")

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")

	SYSCTL_BOOL (_vfs, OID_AUTO, default_autoro, CTLFLAG_RW, &default_autoro, 0, "Retry failed r/w mount as r/o if no explicit ro/rw option is specified")

	SYSCTL_BOOL (_vfs, OID_AUTO, recursive_forced_unmount, CTLFLAG_RW, &recursive_forced_unmount, 0, "Recursively unmount stacked upper mounts" " when a file system is forcibly unmounted")

static	SYSCTL_NODE (_vfs, OID_AUTO, deferred_unmount, CTLFLAG_RD\|CTLFLAG_MPSAFE, 0, "deferred unmount controls")

	SYSCTL_UINT (_vfs_deferred_unmount, OID_AUTO, retry_limit, CTLFLAG_RW, &deferred_unmount_retry_limit, 0, "Maximum number of retries for deferred unmount failure")

	SYSCTL_INT (_vfs_deferred_unmount, OID_AUTO, retry_delay_hz, CTLFLAG_RW, &deferred_unmount_retry_delay_hz, 0, "Delay in units of [1/kern.hz]s when retrying a failed deferred unmount")

	SYSCTL_INT (_vfs_deferred_unmount, OID_AUTO, total_retries, CTLFLAG_RD, &deferred_unmount_total_retries, 0, "Total number of retried deferred unmounts")

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

	MALLOC_DEFINE (M_STATFS, "statfs", "statfs structure")

	EVENTHANDLER_LIST_DEFINE (vfs_mounted)

	EVENTHANDLER_LIST_DEFINE (vfs_unmounted)

static void	vfs_deferred_unmount (void *arg, int pending)

	MTX_SYSINIT (deferred_unmount, &deferred_unmount_lock, "deferred_unmount", MTX_DEF)

static	STAILQ_HEAD (mount)

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)

struct mount *	vfs_ref_from_vp (struct vnode *vp)

void	vfs_ref (struct mount *mp)

struct mount *	vfs_register_upper_from_vp (struct vnode vp, struct mount ump, struct mount_upper_node *upper)

void	vfs_register_for_notification (struct mount mp, struct mount ump, struct mount_upper_node *upper)

static void	vfs_drain_upper_locked (struct mount *mp)

void	vfs_unregister_for_notification (struct mount mp, struct mount_upper_node upper)

void	vfs_unregister_upper (struct mount mp, struct mount_upper_node upper)

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)

static bool	vfs_should_downgrade_to_ro_mount (uint64_t fsflags, int error)

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	kern_unmount (struct thread td, const char path, int flags)

static int	vfs_check_usecounts (struct mount *mp)

static void	dounmount_cleanup (struct mount mp, struct vnode coveredvp, int mntkflags)

void	vfs_op_enter (struct mount *mp)

void	vfs_op_exit_locked (struct mount *mp)

void	vfs_op_exit (struct mount *mp)

static void	vfs_op_action_func (void *arg)

static void	vfs_op_wait_func (void *arg, int cpu)

void	vfs_op_barrier_wait (struct mount *mp)

int	vfs_mount_fetch_counter (struct mount *mp, enum mount_counter which)

static bool	deferred_unmount_enqueue (struct mount *mp, uint64_t flags, bool requeue, int timeout_ticks)

static void	vfs_deferred_unmount (void *argi __unused, int pending __unused)

int	dounmount (struct mount mp, uint64_t 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)

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

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)

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)

static void	mount_devctl_event (const char type, struct mount mp, bool donew)

int	vfs_remount_ro (struct mount *mp)

void	suspend_all_fs (void)

void	resume_all_fs (void)

Variables
static int	usermount = 0

static bool	default_autoro = false

static bool	recursive_forced_unmount = false

static unsigned int	deferred_unmount_retry_limit = 10

static int	deferred_unmount_retry_delay_hz

static int	deferred_unmount_total_retries = 0

static uma_zone_t	mount_zone

struct mntlist	mountlist = TAILQ_HEAD_INITIALIZER(mountlist)

struct mtx_padalign __exclusive_cache_line	mountlist_mtx

static struct timeout_task	deferred_unmount_task

static struct mtx	deferred_unmount_lock

static struct mntoptnames	optnames []

Macro Definition Documentation

◆ DEVCTL_LEN

#define DEVCTL_LEN 1024

Definition at line 2824 of file vfs_mount.c.

◆ VFS_MOUNTARG_SIZE_MAX

#define VFS_MOUNTARG_SIZE_MAX (1024 * 64)

Definition at line 79 of file vfs_mount.c.

Function Documentation

◆ __FBSDID()

__FBSDID ( "$FreeBSD$" )

◆ __vfs_statfs()

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

Definition at line 2612 of file vfs_mount.c.

◆ deferred_unmount_enqueue()

static bool deferred_unmount_enqueue	(	struct mount *	mp,
		uint64_t	flags,
		bool	requeue,
		int	timeout_ticks
	)

static

Definition at line 1925 of file vfs_mount.c.

References deferred_unmount_lock, deferred_unmount_task, flags, and taskqueue_enqueue_timeout().

Referenced by dounmount(), and vfs_deferred_unmount().

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◆ dounmount()

int dounmount	(	struct mount *	mp,
		uint64_t	flags,
		struct thread *	td
	)

Definition at line 2002 of file vfs_mount.c.

References deferred_unmount_enqueue(), deferred_unmount_retry_limit, dounmount_cleanup(), flags, mount_devctl_event(), mountlist, mountlist_mtx, recursive_forced_unmount, rootdevmp, rootvnode, taskqueue_member(), vdrop(), vfs_allocate_syncvnode(), vfs_cache_root_clear(), vfs_check_usecounts(), vfs_deallocate_syncvnode(), vfs_event_signal(), vfs_mount_destroy(), vfs_op_enter(), vfs_op_exit_locked(), vfs_periodic(), vfs_ref(), vfs_rel(), vfs_setpublicfs(), vfs_suser(), vhold(), vn_finished_write(), vn_irflag_unset_locked(), vn_seqc_write_begin(), vn_seqc_write_end(), vn_seqc_write_end_locked(), vn_start_write(), vrele(), and wakeup().

Referenced by kern_unmount(), unmount_or_warn(), and vfs_deferred_unmount().

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◆ dounmount_cleanup()

static void dounmount_cleanup	(	struct mount *	mp,
		struct vnode *	coveredvp,
		int	mntkflags
	)

static

Definition at line 1701 of file vfs_mount.c.

References vdrop(), vfs_op_exit_locked(), vn_finished_write(), and wakeup().

Referenced by dounmount().

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◆ EVENTHANDLER_LIST_DEFINE() [1/2]

EVENTHANDLER_LIST_DEFINE ( vfs_mounted )

◆ EVENTHANDLER_LIST_DEFINE() [2/2]

EVENTHANDLER_LIST_DEFINE ( vfs_unmounted )

◆ free_mntarg()

static void free_mntarg ( struct mntarg * ma )

static

Definition at line 2782 of file vfs_mount.c.

References free(), and mntarg::v.

Referenced by kernel_mount().

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◆ kern_unmount()

int kern_unmount	(	struct thread *	td,
		const char *	path,
		int	flags
	)

Definition at line 1589 of file vfs_mount.c.

References dounmount(), flags, free(), malloc(), mountlist, mountlist_mtx, namei(), NDFREE(), path, priv_check(), sscanf(), usermount, vfs_getvfs(), vfs_ref(), vfs_rel(), vn_path_to_global_path(), and vput().

Referenced by sys_unmount().

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◆ kernel_mount()

int kernel_mount	(	struct mntarg *	ma,
		uint64_t	flags
	)

Definition at line 2799 of file vfs_mount.c.

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

Referenced by parse_mount().

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◆ MALLOC_DEFINE() [1/2]

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

◆ MALLOC_DEFINE() [2/2]

MALLOC_DEFINE	(	M_STATFS	,
		"statfs"	,
		"statfs structure"
	)

◆ mount_arg()

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

Definition at line 2753 of file vfs_mount.c.

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

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

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◆ mount_argb()

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

Definition at line 2672 of file vfs_mount.c.

References flag, mount_arg(), and name.

Referenced by sys_mount().

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◆ mount_argf()

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

Definition at line 2685 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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◆ mount_argsu()

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

Definition at line 2727 of file vfs_mount.c.

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

Referenced by sys_mount().

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◆ mount_devctl_event()

static void mount_devctl_event	(	const char *	type,
		struct mount *	mp,
		bool	donew
	)

static

Definition at line 2826 of file vfs_mount.c.

References buf, DEVCTL_LEN, devctl_notify(), devctl_safe_quote_sb(), free(), malloc(), optnames, sbuf_cat(), sbuf_cpy(), sbuf_data(), sbuf_delete(), sbuf_error(), sbuf_finish(), sbuf_new(), sbuf_printf(), sbuf_putc(), and type.

Referenced by dounmount(), vfs_domount_first(), and vfs_domount_update().

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◆ mount_fini()

static void mount_fini	(	void *	mem,
		int	size
	)

static

Definition at line 171 of file vfs_mount.c.

References lockdestroy(), and pcpu_zone_16.

Referenced by vfs_mount_init().

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◆ mount_init()

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

static

Definition at line 155 of file vfs_mount.c.

References lockinit(), and pcpu_zone_16.

Referenced by vfs_mount_init().

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◆ MTX_SYSINIT()

MTX_SYSINIT	(	deferred_unmount	,
		&	deferred_unmount_lock,
		"deferred_unmount"	,
		MTX_DEF
	)

◆ resume_all_fs()

void resume_all_fs ( void )

Definition at line 3004 of file vfs_mount.c.

References mountlist, mountlist_mtx, vfs_unbusy(), and vfs_write_resume().

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◆ STAILQ_HEAD()

static STAILQ_HEAD ( mount )

static

Definition at line 134 of file vfs_mount.c.

Referenced by vfs_deferred_unmount().

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◆ suspend_all_fs()

void suspend_all_fs ( void )

Definition at line 2970 of file vfs_mount.c.

References mountlist, mountlist_mtx, printf(), vfs_busy(), vfs_unbusy(), and vfs_write_suspend().

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◆ sys_mount()

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

Definition at line 1021 of file vfs_mount.c.

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

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◆ sys_nmount()

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

Definition at line 433 of file vfs_mount.c.

References copyinuio(), flags, nmount_args::flags, free(), nmount_args::iovcnt, nmount_args::iovp, and vfs_donmount().

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◆ sys_unmount()

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

Definition at line 1582 of file vfs_mount.c.

References unmount_args::flags, kern_unmount(), and unmount_args::path.

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◆ SYSCTL_BOOL() [1/2]

SYSCTL_BOOL	(	_vfs	,
		OID_AUTO	,
		default_autoro	,
		CTLFLAG_RW	,
		&	default_autoro,
		0	,
		"Retry failed r/w mount as r/o if no explicit ro/rw option is specified"
	)

◆ SYSCTL_BOOL() [2/2]

SYSCTL_BOOL	(	_vfs	,
		OID_AUTO	,
		recursive_forced_unmount	,
		CTLFLAG_RW	,
		&	recursive_forced_unmount,
		0	,
		"Recursively unmount stacked upper mounts" " when a file system is forcibly unmounted"
	)

◆ SYSCTL_INT() [1/3]

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

◆ SYSCTL_INT() [2/3]

SYSCTL_INT	(	_vfs_deferred_unmount	,
		OID_AUTO	,
		retry_delay_hz	,
		CTLFLAG_RW	,
		&	deferred_unmount_retry_delay_hz,
		0	,
		"Delay in units of s when retrying a failed deferred unmount"	[1/kern.hz]
	)

◆ SYSCTL_INT() [3/3]

SYSCTL_INT	(	_vfs_deferred_unmount	,
		OID_AUTO	,
		total_retries	,
		CTLFLAG_RD	,
		&	deferred_unmount_total_retries,
		0	,
		"Total number of retried deferred unmounts"
	)

◆ SYSCTL_NODE()

static SYSCTL_NODE	(	_vfs	,
		OID_AUTO	,
		deferred_unmount	,
		CTLFLAG_RD\|	CTLFLAG_MPSAFE,
		0	,
		"deferred unmount controls"
	)

static

◆ SYSCTL_UINT()

SYSCTL_UINT	(	_vfs_deferred_unmount	,
		OID_AUTO	,
		retry_limit	,
		CTLFLAG_RW	,
		&	deferred_unmount_retry_limit,
		0	,
		"Maximum number of retries for deferred unmount failure"
	)

◆ SYSINIT()

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

◆ vfs_buildopts()

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

Definition at line 319 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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◆ vfs_check_usecounts()

static int vfs_check_usecounts ( struct mount * mp )

static

Definition at line 1683 of file vfs_mount.c.

Referenced by dounmount().

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◆ vfs_copyopt()

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

Definition at line 2593 of file vfs_mount.c.

References name.

Referenced by kern_jail_get(), kern_jail_set(), msg_prison_check(), msg_prison_set(), sem_prison_check(), sem_prison_set(), shm_prison_check(), shm_prison_set(), and vfs_domount_update().

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◆ vfs_deferred_unmount() [1/2]

static void vfs_deferred_unmount	(	void *	arg,
		int	pending
	)

static

Referenced by vfs_mount_init().

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◆ vfs_deferred_unmount() [2/2]

static void vfs_deferred_unmount	(	void *argi	__unused,
		int pending	__unused
	)

static

Definition at line 1952 of file vfs_mount.c.

References deferred_unmount_enqueue(), deferred_unmount_lock, deferred_unmount_retry_delay_hz, deferred_unmount_retry_limit, deferred_unmount_total_retries, dounmount(), flags, printf(), STAILQ_HEAD(), and vfs_rel().

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◆ vfs_deleteopt()

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

Definition at line 225 of file vfs_mount.c.

References name, and vfs_freeopt().

Referenced by vfs_export().

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◆ vfs_domount()

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

static

Definition at line 1477 of file vfs_mount.c.

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

Referenced by vfs_donmount().

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◆ vfs_domount_first()

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 1080 of file vfs_mount.c.

References cache_purge(), mount_devctl_event(), mountcheckdirs(), mountlist, mountlist_mtx, printf(), prison_allow(), priv_check_cred(), vdrop(), vfs_allocate_syncvnode(), vfs_cache_root_clear(), vfs_emptydir(), vfs_event_signal(), vfs_freeopts(), vfs_mount_alloc(), vfs_mount_destroy(), vfs_op_exit(), vfs_unbusy(), vhold(), vinvalbuf(), vn_finished_write(), vn_irflag_set_locked(), vn_lock_pair(), vn_seqc_write_begin(), vn_seqc_write_end(), vn_start_write(), vput(), and vrele().

Referenced by vfs_domount().

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◆ vfs_domount_update()

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

static

Definition at line 1256 of file vfs_mount.c.

References flag, free(), malloc(), mount_devctl_event(), vfs_allocate_syncvnode(), vfs_busy(), vfs_cache_root_clear(), vfs_copyopt(), vfs_deallocate_syncvnode(), vfs_export(), vfs_freeopts(), vfs_getopt(), vfs_mergeopts(), vfs_op_enter(), vfs_op_exit(), vfs_suser(), vfs_unbusy(), vn_seqc_write_begin(), vn_seqc_write_end(), vput(), and vrele().

Referenced by vfs_domount().

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◆ vfs_donmount()

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

Definition at line 805 of file vfs_mount.c.

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

Referenced by kernel_mount(), and sys_nmount().

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◆ vfs_drain_upper_locked()

static void vfs_drain_upper_locked ( struct mount * mp )

static

Definition at line 599 of file vfs_mount.c.

Referenced by vfs_unregister_for_notification(), and vfs_unregister_upper().

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◆ vfs_equalopts()

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

static

Definition at line 260 of file vfs_mount.c.

References vfs_isopt_ro(), and vfs_isopt_rw().

Referenced by vfs_sanitizeopts().

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◆ vfs_filteropt()

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

Definition at line 2323 of file vfs_mount.c.

References printf(), and snprintf().

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◆ vfs_flagopt()

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

Definition at line 2480 of file vfs_mount.c.

References name.

Referenced by kern_jail_set(), msg_prison_set(), sem_prison_set(), and shm_prison_set().

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◆ vfs_freeopt()

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

static

Definition at line 201 of file vfs_mount.c.

References free().

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

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◆ vfs_freeopts()

void vfs_freeopts ( struct vfsoptlist * opts )

Definition at line 213 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(), vfs_mount_destroy(), and vfs_remount_ro().

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◆ vfs_getopt()

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

Definition at line 2381 of file vfs_mount.c.

References buf, and name.

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

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◆ vfs_getopt_pos()

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

Definition at line 2401 of file vfs_mount.c.

References name.

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

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◆ vfs_getopt_size()

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

Definition at line 2418 of file vfs_mount.c.

References name, value, and vfs_getopt().

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◆ vfs_getopts()

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

Definition at line 2459 of file vfs_mount.c.

References name.

◆ vfs_isopt_ro()

static int vfs_isopt_ro ( const char * opt )

static

Definition at line 238 of file vfs_mount.c.

Referenced by vfs_equalopts().

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◆ vfs_isopt_rw()

static int vfs_isopt_rw ( const char * opt )

static

Definition at line 248 of file vfs_mount.c.

Referenced by vfs_equalopts().

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◆ vfs_mergeopts()

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

static

Definition at line 403 of file vfs_mount.c.

References malloc(), and vfs_sanitizeopts().

Referenced by vfs_domount_update(), and vfs_remount_ro().

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◆ vfs_mount_alloc()

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

Definition at line 665 of file vfs_mount.c.

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

Referenced by vfs_domount_first(), and vfs_mountroot_devfs().

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◆ vfs_mount_destroy()

void vfs_mount_destroy ( struct mount * mp )

Definition at line 718 of file vfs_mount.c.

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

Referenced by dounmount(), and vfs_domount_first().

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◆ vfs_mount_error()

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

Definition at line 2282 of file vfs_mount.c.

References vfs_getopt(), and vsnprintf().

Referenced by vfs_hang_addrlist().

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◆ vfs_mount_fetch_counter()

int vfs_mount_fetch_counter	(	struct mount *	mp,
		enum mount_counter	which
	)

Definition at line 1890 of file vfs_mount.c.

◆ vfs_mount_init()

static void vfs_mount_init ( void *dummy __unused )

static

Definition at line 183 of file vfs_mount.c.

References deferred_unmount_retry_delay_hz, deferred_unmount_task, hz, mount_fini(), mount_init(), mount_zone, mountlist_mtx, and vfs_deferred_unmount().

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◆ vfs_mountedfrom()

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

Definition at line 2633 of file vfs_mount.c.

Referenced by mqfs_mount().

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◆ vfs_op_action_func()

static void vfs_op_action_func ( void * arg )

static

Definition at line 1785 of file vfs_mount.c.

References vfs_op_barrier_ipi::mp, and smp_rendezvous_cpus_done().

Referenced by vfs_op_barrier_wait().

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◆ vfs_op_barrier_wait()

void vfs_op_barrier_wait ( struct mount * mp )

Definition at line 1813 of file vfs_mount.c.

References all_cpus, vfs_op_barrier_ipi::mp, smp_no_rendezvous_barrier(), smp_rendezvous_cpus_retry(), vfs_op_barrier_ipi::srcra, vfs_op_action_func(), and vfs_op_wait_func().

Referenced by vfs_cache_root_fallback(), and vfs_op_enter().

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◆ vfs_op_enter()

void vfs_op_enter ( struct mount * mp )

Definition at line 1727 of file vfs_mount.c.

References panic(), and vfs_op_barrier_wait().

Referenced by dounmount(), vfs_domount_update(), vfs_remount_ro(), and vfs_write_suspend().

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◆ vfs_op_exit()

void vfs_op_exit ( struct mount * mp )

Definition at line 1771 of file vfs_mount.c.

References vfs_op_exit_locked().

Referenced by vfs_domount_first(), vfs_domount_update(), vfs_mountroot_devfs(), vfs_remount_ro(), and vfs_write_resume().

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◆ vfs_op_exit_locked()

void vfs_op_exit_locked ( struct mount * mp )

Definition at line 1759 of file vfs_mount.c.

References panic().

Referenced by dounmount(), dounmount_cleanup(), vfs_op_exit(), and vfs_write_suspend().

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◆ vfs_op_wait_func()

static void vfs_op_wait_func	(	void *	arg,
		int	cpu
	)

static

Definition at line 1798 of file vfs_mount.c.

References vfs_op_barrier_ipi::mp.

Referenced by vfs_op_barrier_wait().

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◆ vfs_opterror()

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

Definition at line 2299 of file vfs_mount.c.

References vfs_getopt(), and vsnprintf().

Referenced by kern_jail_get(), and kern_jail_set().

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◆ vfs_ref()

void vfs_ref ( struct mount * mp )

Definition at line 527 of file vfs_mount.c.

Referenced by dounmount(), kern_reroot(), kern_unmount(), sys_quotactl(), vfs_getvfs(), vfs_unmountall(), vn_start_write(), and vn_vget_ino_gen().

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◆ vfs_ref_from_vp()

struct mount * vfs_ref_from_vp ( struct vnode * vp )

Definition at line 496 of file vfs_mount.c.

Referenced by kern_fstatfs(), kern_statfs(), and vop_stdgetwritemount().

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◆ vfs_register_for_notification()

void vfs_register_for_notification	(	struct mount *	mp,
		struct mount *	ump,
		struct mount_upper_node *	upper
	)

Definition at line 589 of file vfs_mount.c.

◆ vfs_register_upper_from_vp()

struct mount * vfs_register_upper_from_vp	(	struct vnode *	vp,
		struct mount *	ump,
		struct mount_upper_node *	upper
	)

Definition at line 556 of file vfs_mount.c.

◆ vfs_rel()

void vfs_rel ( struct mount * mp )

Definition at line 645 of file vfs_mount.c.

Referenced by dounmount(), kern_do_statfs(), kern_reroot(), kern_unmount(), sys_quotactl(), sysctl_vfs_ctl(), vfs_deferred_unmount(), vfs_getnewfsid(), vn_start_secondary_write(), and vn_vget_ino_gen().

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◆ vfs_remount_ro()

int vfs_remount_ro ( struct mount * mp )

Definition at line 2881 of file vfs_mount.c.

References malloc(), vfs_cache_root_clear(), vfs_deallocate_syncvnode(), vfs_freeopts(), vfs_mergeopts(), vfs_op_enter(), vfs_op_exit(), vget(), vn_seqc_write_begin(), vn_seqc_write_end(), vput(), and vrele().

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◆ vfs_sanitizeopts()

static void vfs_sanitizeopts ( struct vfsoptlist * opts )

static

Definition at line 297 of file vfs_mount.c.

References vfs_equalopts(), and vfs_freeopt().

Referenced by vfs_buildopts(), and vfs_mergeopts().

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◆ vfs_scanopt()

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

Definition at line 2499 of file vfs_mount.c.

References name, and vsscanf().

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◆ vfs_setopt()

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

Definition at line 2524 of file vfs_mount.c.

References name, and value.

Referenced by kern_jail_get(), msg_prison_get(), sem_prison_get(), and shm_prison_get().

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◆ vfs_setopt_part()

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

Definition at line 2545 of file vfs_mount.c.

References name, and value.

Referenced by kern_jail_get().

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◆ vfs_setopts()

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

Definition at line 2567 of file vfs_mount.c.

References name, and value.

Referenced by kern_jail_get().

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◆ vfs_should_downgrade_to_ro_mount()

static bool vfs_should_downgrade_to_ro_mount	(	uint64_t	fsflags,
		int	error
	)

static

Definition at line 780 of file vfs_mount.c.

Referenced by vfs_donmount().

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◆ vfs_unregister_for_notification()

void vfs_unregister_for_notification	(	struct mount *	mp,
		struct mount_upper_node *	upper
	)

Definition at line 614 of file vfs_mount.c.

References vfs_drain_upper_locked().

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◆ vfs_unregister_upper()

void vfs_unregister_upper	(	struct mount *	mp,
		struct mount_upper_node *	upper
	)

Definition at line 628 of file vfs_mount.c.

References vfs_drain_upper_locked(), and wakeup().

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Variable Documentation

◆ default_autoro

bool default_autoro = false

static

Definition at line 89 of file vfs_mount.c.

Referenced by vfs_donmount().

◆ deferred_unmount_lock

struct mtx deferred_unmount_lock

static

Definition at line 131 of file vfs_mount.c.

Referenced by deferred_unmount_enqueue(), and vfs_deferred_unmount().

◆ deferred_unmount_retry_delay_hz

int deferred_unmount_retry_delay_hz

static

Definition at line 106 of file vfs_mount.c.

Referenced by vfs_deferred_unmount(), and vfs_mount_init().

◆ deferred_unmount_retry_limit

unsigned int deferred_unmount_retry_limit = 10

static

Definition at line 101 of file vfs_mount.c.

Referenced by dounmount(), and vfs_deferred_unmount().

◆ deferred_unmount_task

struct timeout_task deferred_unmount_task

static

Definition at line 130 of file vfs_mount.c.

Referenced by deferred_unmount_enqueue(), and vfs_mount_init().

◆ deferred_unmount_total_retries

int deferred_unmount_total_retries = 0

static

Definition at line 111 of file vfs_mount.c.

Referenced by vfs_deferred_unmount().

◆ mount_zone

uma_zone_t mount_zone

static

Definition at line 118 of file vfs_mount.c.

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

◆ mountlist

struct mntlist mountlist = TAILQ_HEAD_INITIALIZER(mountlist)

Definition at line 121 of file vfs_mount.c.

Referenced by bufshutdown(), dounmount(), kern_getfsstat(), kern_reroot(), kern_sync(), kern_unmount(), resume_all_fs(), set_rootvnode(), suspend_all_fs(), vfs_busyfs(), vfs_domount_first(), vfs_getvfs(), vfs_mountroot(), vfs_mountroot_devfs(), vfs_mountroot_shuffle(), and vfs_unmountall().

◆ mountlist_mtx

struct mtx_padalign __exclusive_cache_line mountlist_mtx

Definition at line 124 of file vfs_mount.c.

Referenced by dounmount(), kern_getfsstat(), kern_reroot(), kern_sync(), kern_unmount(), resume_all_fs(), suspend_all_fs(), vfs_busy(), vfs_busyfs(), vfs_domount_first(), vfs_getvfs(), vfs_mount_init(), vfs_mountroot(), vfs_mountroot_devfs(), and vfs_mountroot_shuffle().

◆ optnames

struct mntoptnames optnames[]

static

Initial value:

= {
        MNTOPT_NAMES
}

Definition at line 2820 of file vfs_mount.c.

Referenced by mount_devctl_event().

◆ recursive_forced_unmount

bool recursive_forced_unmount = false

static

Definition at line 93 of file vfs_mount.c.

Referenced by dounmount().

◆ usermount

int usermount = 0

static

Definition at line 85 of file vfs_mount.c.

Referenced by kern_unmount(), and vfs_domount().

Data Structures

Macros

Functions

Variables

Macro Definition Documentation

◆ DEVCTL_LEN

◆ VFS_MOUNTARG_SIZE_MAX

Function Documentation

◆ __FBSDID()

◆ __vfs_statfs()

◆ deferred_unmount_enqueue()

◆ dounmount()

◆ dounmount_cleanup()

◆ EVENTHANDLER_LIST_DEFINE() [1/2]

◆ EVENTHANDLER_LIST_DEFINE() [2/2]

◆ free_mntarg()

◆ kern_unmount()

◆ kernel_mount()

◆ MALLOC_DEFINE() [1/2]

◆ MALLOC_DEFINE() [2/2]

◆ mount_arg()

◆ mount_argb()

◆ mount_argf()

◆ mount_argsu()

◆ mount_devctl_event()

◆ mount_fini()

◆ mount_init()

◆ MTX_SYSINIT()

◆ resume_all_fs()

◆ STAILQ_HEAD()

◆ suspend_all_fs()

◆ sys_mount()

◆ sys_nmount()

◆ sys_unmount()

◆ SYSCTL_BOOL() [1/2]

◆ SYSCTL_BOOL() [2/2]

◆ SYSCTL_INT() [1/3]

◆ SYSCTL_INT() [2/3]

◆ SYSCTL_INT() [3/3]

◆ SYSCTL_NODE()

◆ SYSCTL_UINT()

◆ SYSINIT()

◆ vfs_buildopts()

◆ vfs_check_usecounts()

◆ vfs_copyopt()

◆ vfs_deferred_unmount() [1/2]

◆ vfs_deferred_unmount() [2/2]

◆ vfs_deleteopt()

◆ vfs_domount()

◆ vfs_domount_first()

◆ vfs_domount_update()

◆ vfs_donmount()

◆ vfs_drain_upper_locked()

◆ vfs_equalopts()

◆ vfs_filteropt()

◆ vfs_flagopt()

◆ vfs_freeopt()

◆ vfs_freeopts()

◆ vfs_getopt()

◆ vfs_getopt_pos()

◆ vfs_getopt_size()

◆ vfs_getopts()

◆ vfs_isopt_ro()

◆ vfs_isopt_rw()

◆ vfs_mergeopts()

◆ vfs_mount_alloc()

◆ vfs_mount_destroy()

◆ vfs_mount_error()

◆ vfs_mount_fetch_counter()

◆ vfs_mount_init()

◆ vfs_mountedfrom()

◆ vfs_op_action_func()

◆ vfs_op_barrier_wait()

◆ vfs_op_enter()

◆ vfs_op_exit()

◆ vfs_op_exit_locked()

◆ vfs_op_wait_func()

◆ vfs_opterror()

◆ vfs_ref()

◆ vfs_ref_from_vp()