vfs_vnops.c File Reference

#include <sys/cdefs.h>
#include "opt_hwpmc_hooks.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/disk.h>
#include <sys/fail.h>
#include <sys/fcntl.h>
#include <sys/file.h>
#include <sys/kdb.h>
#include <sys/ktr.h>
#include <sys/stat.h>
#include <sys/priv.h>
#include <sys/proc.h>
#include <sys/limits.h>
#include <sys/lock.h>
#include <sys/mman.h>
#include <sys/mount.h>
#include <sys/mutex.h>
#include <sys/namei.h>
#include <sys/vnode.h>
#include <sys/bio.h>
#include <sys/buf.h>
#include <sys/filio.h>
#include <sys/resourcevar.h>
#include <sys/rwlock.h>
#include <sys/prng.h>
#include <sys/sx.h>
#include <sys/sleepqueue.h>
#include <sys/sysctl.h>
#include <sys/ttycom.h>
#include <sys/conf.h>
#include <sys/syslog.h>
#include <sys/unistd.h>
#include <sys/user.h>
#include <sys/ktrace.h>
#include <security/audit/audit.h>
#include <security/mac/mac_framework.h>
#include <vm/vm.h>
#include <vm/vm_extern.h>
#include <vm/pmap.h>
#include <vm/vm_map.h>
#include <vm/vm_object.h>
#include <vm/vm_page.h>
#include <vm/vm_pager.h>

Include dependency graph for vfs_vnops.c:

Go to the source code of this file.

Data Structures
struct	vn_io_fault_args

Functions
	__FBSDID ("$FreeBSD$")
	SYSCTL_INT (_debug, OID_AUTO, vn_io_fault_enable, CTLFLAG_RWTUN, &vn_io_fault_enable, 0, "Enable vn_io_fault lock avoidance")
	SYSCTL_INT (_debug, OID_AUTO, vn_io_fault_prefault, CTLFLAG_RWTUN, &vn_io_fault_prefault, 0, "Enable vn_io_fault prefaulting")
	SYSCTL_INT (_debug, OID_AUTO, vn_io_pgcache_read_enable, CTLFLAG_RWTUN, &vn_io_pgcache_read_enable, 0, "Enable copying from page cache for reads, avoiding fs")
	SYSCTL_ULONG (_debug, OID_AUTO, vn_io_faults, CTLFLAG_RD, &vn_io_faults_cnt, 0, "Count of vn_io_fault lock avoidance triggers")
	SYSCTL_INT (_security_bsd, OID_AUTO, allow_read_dir, CTLFLAG_RW, &vfs_allow_read_dir, 0, "Enable read(2) of directory by root for filesystems that support it")
static bool	do_vn_io_fault (struct vnode *vp, struct uio *uio)
static int	vn_io_fault1 (struct vnode *vp, struct uio *uio, struct vn_io_fault_args *args, struct thread *td)
int	vn_open (struct nameidata *ndp, int *flagp, int cmode, struct file *fp)
static uint64_t	open2nameif (int fmode, u_int vn_open_flags)
int	vn_open_cred (struct nameidata *ndp, int *flagp, int cmode, u_int vn_open_flags, struct ucred *cred, struct file *fp)
static int	vn_open_vnode_advlock (struct vnode *vp, int fmode, struct file *fp)
int	vn_open_vnode (struct vnode *vp, int fmode, struct ucred *cred, struct thread *td, struct file *fp)
int	vn_writechk (struct vnode *vp)
static int	vn_close1 (struct vnode *vp, int flags, struct ucred *file_cred, struct thread *td, bool keep_ref)
int	vn_close (struct vnode *vp, int flags, struct ucred *file_cred, struct thread *td)
static int	sequential_heuristic (struct uio *uio, struct file *fp)
int	vn_rdwr (enum uio_rw rw, struct vnode *vp, void *base, int len, off_t offset, enum uio_seg segflg, int ioflg, struct ucred *active_cred, struct ucred *file_cred, ssize_t *aresid, struct thread *td)
int	vn_rdwr_inchunks (enum uio_rw rw, struct vnode *vp, void *base, size_t len, off_t offset, enum uio_seg segflg, int ioflg, struct ucred *active_cred, struct ucred *file_cred, size_t *aresid, struct thread *td)
off_t	foffset_lock (struct file *fp, int flags)
void	foffset_unlock (struct file *fp, off_t val, int flags)
void	foffset_lock_uio (struct file *fp, struct uio *uio, int flags)
void	foffset_unlock_uio (struct file *fp, struct uio *uio, int flags)
static int	get_advice (struct file *fp, struct uio *uio)
static int	get_write_ioflag (struct file *fp)
int	vn_read_from_obj (struct vnode *vp, struct uio *uio)
static int	vn_read (struct file *fp, struct uio *uio, struct ucred *active_cred, int flags, struct thread *td)
static int	vn_write (struct file *fp, struct uio *uio, struct ucred *active_cred, int flags, struct thread *td)
static int	vn_io_fault_doio (struct vn_io_fault_args *args, struct uio *uio, struct thread *td)
static int	vn_io_fault_touch (char *base, const struct uio *uio)
static int	vn_io_fault_prefault_user (const struct uio *uio)
static int	vn_io_fault (struct file *fp, struct uio *uio, struct ucred *active_cred, int flags, struct thread *td)
int	vn_io_fault_uiomove (char *data, int xfersize, struct uio *uio)
int	vn_io_fault_pgmove (vm_page_t ma[], vm_offset_t offset, int xfersize, struct uio *uio)
static int	vn_truncate (struct file *fp, off_t length, struct ucred *active_cred, struct thread *td)
int	vn_truncate_locked (struct vnode *vp, off_t length, bool sync, struct ucred *cred)
int	vn_statfile (struct file *fp, struct stat *sb, struct ucred *active_cred)
static int	vn_ioctl (struct file *fp, u_long com, void *data, struct ucred *active_cred, struct thread *td)
static int	vn_poll (struct file *fp, int events, struct ucred *active_cred, struct thread *td)
static int __noinline	_vn_lock_fallback (struct vnode *vp, int flags, const char *file, int line, int error)
int	_vn_lock (struct vnode *vp, int flags, const char *file, int line)
static int	vn_closefile (struct file *fp, struct thread *td)
static int	vn_start_write_refed (struct mount *mp, int flags, bool mplocked)
int	vn_start_write (struct vnode *vp, struct mount **mpp, int flags)
int	vn_start_secondary_write (struct vnode *vp, struct mount **mpp, int flags)
void	vn_finished_write (struct mount *mp)
void	vn_finished_secondary_write (struct mount *mp)
int	vfs_write_suspend (struct mount *mp, int flags)
void	vfs_write_resume (struct mount *mp, int flags)
int	vfs_write_suspend_umnt (struct mount *mp)
static int	vn_kqfilter (struct file *fp, struct knote *kn)
int	vn_kqfilter_opath (struct file *fp, struct knote *kn)
int	vn_extattr_get (struct vnode *vp, int ioflg, int attrnamespace, const char *attrname, int *buflen, char *buf, struct thread *td)
int	vn_extattr_set (struct vnode *vp, int ioflg, int attrnamespace, const char *attrname, int buflen, char *buf, struct thread *td)
int	vn_extattr_rm (struct vnode *vp, int ioflg, int attrnamespace, const char *attrname, struct thread *td)
static int	vn_get_ino_alloc_vget (struct mount *mp, void *arg, int lkflags, struct vnode **rvp)
int	vn_vget_ino (struct vnode *vp, ino_t ino, int lkflags, struct vnode **rvp)
int	vn_vget_ino_gen (struct vnode *vp, vn_get_ino_t alloc, void *alloc_arg, int lkflags, struct vnode **rvp)
int	vn_rlimit_fsize (const struct vnode *vp, const struct uio *uio, struct thread *td)
int	vn_chmod (struct file *fp, mode_t mode, struct ucred *active_cred, struct thread *td)
int	vn_chown (struct file *fp, uid_t uid, gid_t gid, struct ucred *active_cred, struct thread *td)
void	vn_pages_remove (struct vnode *vp, vm_pindex_t start, vm_pindex_t end)
void	vn_pages_remove_valid (struct vnode *vp, vm_pindex_t start, vm_pindex_t end)
int	vn_bmap_seekhole_locked (struct vnode *vp, u_long cmd, off_t *off, struct ucred *cred)
int	vn_bmap_seekhole (struct vnode *vp, u_long cmd, off_t *off, struct ucred *cred)
int	vn_seek (struct file *fp, off_t offset, int whence, struct thread *td)
int	vn_utimes_perm (struct vnode *vp, struct vattr *vap, struct ucred *cred, struct thread *td)
int	vn_fill_kinfo (struct file *fp, struct kinfo_file *kif, struct filedesc *fdp)
static void	vn_fill_junk (struct kinfo_file *kif)
int	vn_fill_kinfo_vnode (struct vnode *vp, struct kinfo_file *kif)
int	vn_mmap (struct file *fp, vm_map_t map, vm_offset_t *addr, vm_size_t size, vm_prot_t prot, vm_prot_t cap_maxprot, int flags, vm_ooffset_t foff, struct thread *td)
void	vn_fsid (struct vnode *vp, struct vattr *va)
int	vn_fsync_buf (struct vnode *vp, int waitfor)
int	vn_copy_file_range (struct vnode *invp, off_t *inoffp, struct vnode *outvp, off_t *outoffp, size_t *lenp, unsigned int flags, struct ucred *incred, struct ucred *outcred, struct thread *fsize_td)
static bool	mem_iszero (void *dat, int len)
static off_t	vn_skip_hole (struct vnode *outvp, off_t xfer2, off_t *outoffp, off_t *xferp, off_t *dataoffp, off_t *holeoffp, struct ucred *cred)
static int	vn_write_outvp (struct vnode *outvp, char *dat, off_t outoff, off_t xfer, u_long blksize, bool growfile, bool checkhole, struct ucred *cred)
int	vn_generic_copy_file_range (struct vnode *invp, off_t *inoffp, struct vnode *outvp, off_t *outoffp, size_t *lenp, unsigned int flags, struct ucred *incred, struct ucred *outcred, struct thread *fsize_td)
static int	vn_fallocate (struct file *fp, off_t offset, off_t len, struct thread *td)
static int	vn_deallocate_impl (struct vnode *vp, off_t *offset, off_t *length, int flags, int ioflag, struct ucred *cred, struct ucred *active_cred, struct ucred *file_cred)
int	vn_deallocate (struct vnode *vp, off_t *offset, off_t *length, int flags, int ioflag, struct ucred *active_cred, struct ucred *file_cred)
static int	vn_fspacectl (struct file *fp, int cmd, off_t *offset, off_t *length, int flags, struct ucred *active_cred, struct thread *td)
	SYSCTL_ULONG (_debug, OID_AUTO, vn_lock_pair_pause, CTLFLAG_RD, &vn_lock_pair_pause_cnt, 0, "Count of vn_lock_pair deadlocks")
	SYSCTL_UINT (_debug, OID_AUTO, vn_lock_pair_pause_max, CTLFLAG_RW, &vn_lock_pair_pause_max, 0, "Max ticks for vn_lock_pair deadlock avoidance sleep")
static void	vn_lock_pair_pause (const char *wmesg)
void	vn_lock_pair (struct vnode *vp1, bool vp1_locked, struct vnode *vp2, bool vp2_locked)
int	vn_lktype_write (struct mount *mp, struct vnode *vp)

Variables
static fo_rdwr_t	vn_read
static fo_rdwr_t	vn_write
static fo_rdwr_t	vn_io_fault
static fo_truncate_t	vn_truncate
static fo_ioctl_t	vn_ioctl
static fo_poll_t	vn_poll
static fo_kqfilter_t	vn_kqfilter
static fo_close_t	vn_closefile
static fo_mmap_t	vn_mmap
static fo_fallocate_t	vn_fallocate
static fo_fspacectl_t	vn_fspacectl
struct fileops	vnops
const u_int	io_hold_cnt = 16
static int	vn_io_fault_enable = 1
static int	vn_io_fault_prefault = 0
static int	vn_io_pgcache_read_enable = 1
static u_long	vn_io_faults_cnt
static int	vfs_allow_read_dir = 0
static u_long	vn_lock_pair_pause_cnt
u_int	vn_lock_pair_pause_max

Function Documentation

__FBSDID()

__FBSDID

(

"$FreeBSD$"

)

_vn_lock()

int _vn_lock	(	struct vnode *	vp,
		int	flags,
		const char *	file,
		int	line
	)

Definition at line 1804 of file vfs_vnops.c.

References _vn_lock_fallback(), and flags.

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_vn_lock_fallback()

static int __noinline _vn_lock_fallback ( struct vnode *  vp, int  flags, const char *  file, int  line, int  error  )

static

Definition at line 1767 of file vfs_vnops.c.

References flags.

Referenced by _vn_lock().

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do_vn_io_fault()

static bool do_vn_io_fault ( struct vnode *  vp, struct uio *  uio  )

static

Definition at line 156 of file vfs_vnops.c.

References vn_io_fault_enable.

Referenced by vn_io_fault(), and vn_rdwr().

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foffset_lock()

off_t foffset_lock	(	struct file *	fp,
		int	flags
	)

Definition at line 757 of file vfs_vnops.c.

References flags, vn_io_fault_args::fp, res, sleepq_add(), sleepq_lock(), sleepq_release(), and sleepq_wait().

Referenced by foffset_lock_uio(), kern_getdirentries(), shm_seek(), and vn_seek().

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foffset_lock_uio()

void foffset_lock_uio	(	struct file *	fp,
		struct uio *	uio,
		int	flags
	)

Definition at line 884 of file vfs_vnops.c.

References flags, and foffset_lock().

Referenced by shm_read(), shm_write(), and vn_io_fault().

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foffset_unlock()

void foffset_unlock	(	struct file *	fp,
		off_t	val,
		int	flags
	)

Definition at line 803 of file vfs_vnops.c.

References flags, vn_io_fault_args::fp, sleepq_broadcast(), sleepq_lock(), and sleepq_release().

Referenced by foffset_unlock_uio(), kern_getdirentries(), shm_seek(), and vn_seek().

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foffset_unlock_uio()

void foffset_unlock_uio	(	struct file *	fp,
		struct uio *	uio,
		int	flags
	)

Definition at line 892 of file vfs_vnops.c.

References flags, and foffset_unlock().

Referenced by shm_read(), shm_write(), and vn_io_fault().

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get_advice()

static int get_advice ( struct file *  fp, struct uio *  uio  )

static

Definition at line 900 of file vfs_vnops.c.

References mtx, mtx_pool_find(), and mtxpool_sleep.

Referenced by vn_read(), and vn_write().

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get_write_ioflag()

static int get_write_ioflag ( struct file *  fp )

static

Definition at line 920 of file vfs_vnops.c.

Referenced by vn_fspacectl(), and vn_write().

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mem_iszero()

static bool mem_iszero ( void *  dat, int  len  )

static

Definition at line 2998 of file vfs_vnops.c.

Referenced by vn_generic_copy_file_range().

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open2nameif()

static uint64_t open2nameif ( int  fmode, u_int  vn_open_flags  )

static

Definition at line 199 of file vfs_vnops.c.

References res.

Referenced by vn_open_cred().

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sequential_heuristic()

static int sequential_heuristic ( struct uio *  uio, struct file *  fp  )

static

Definition at line 564 of file vfs_vnops.c.

Referenced by vn_read(), and vn_write().

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SYSCTL_INT() [1/4]

SYSCTL_INT	(	_debug	,
		OID_AUTO	,
		vn_io_fault_enable	,
		CTLFLAG_RWTUN	,
		&	vn_io_fault_enable,
		0	,
		"Enable vn_io_fault lock avoidance"
	)

SYSCTL_INT() [2/4]

SYSCTL_INT	(	_debug	,
		OID_AUTO	,
		vn_io_fault_prefault	,
		CTLFLAG_RWTUN	,
		&	vn_io_fault_prefault,
		0	,
		"Enable vn_io_fault prefaulting"
	)

SYSCTL_INT() [3/4]

SYSCTL_INT	(	_debug	,
		OID_AUTO	,
		vn_io_pgcache_read_enable	,
		CTLFLAG_RWTUN	,
		&	vn_io_pgcache_read_enable,
		0	,
		"Enable copying from page cache for	reads,
		avoiding fs"
	)

SYSCTL_INT() [4/4]

SYSCTL_INT	(	_security_bsd	,
		OID_AUTO	,
		allow_read_dir	,
		CTLFLAG_RW	,
		&	vfs_allow_read_dir,
		0	,
		"Enable read(2) of directory by root for filesystems that support it"
	)

SYSCTL_UINT()

SYSCTL_UINT	(	_debug	,
		OID_AUTO	,
		vn_lock_pair_pause_max	,
		CTLFLAG_RW	,
		&	vn_lock_pair_pause_max,
		0	,
		"Max ticks for vn_lock_pair deadlock avoidance sleep"
	)

SYSCTL_ULONG() [1/2]

SYSCTL_ULONG	(	_debug	,
		OID_AUTO	,
		vn_io_faults	,
		CTLFLAG_RD	,
		&	vn_io_faults_cnt,
		0	,
		"Count of vn_io_fault lock avoidance triggers"
	)

SYSCTL_ULONG() [2/2]

SYSCTL_ULONG	(	_debug	,
		OID_AUTO	,
		vn_lock_pair_pause	,
		CTLFLAG_RD	,
		&	vn_lock_pair_pause_cnt,
		0	,
		"Count of vn_lock_pair deadlocks"
	)

vfs_write_resume()

void vfs_write_resume	(	struct mount *	mp,
		int	flags
	)

Definition at line 2114 of file vfs_vnops.c.

References flags, vfs_op_exit(), vn_start_write_refed(), and wakeup().

Referenced by resume_all_fs(), and vfs_write_suspend().

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vfs_write_suspend()

int vfs_write_suspend	(	struct mount *	mp,
		int	flags
	)

Definition at line 2065 of file vfs_vnops.c.

References flags, vfs_op_enter(), vfs_op_exit_locked(), and vfs_write_resume().

Referenced by suspend_all_fs(), and vfs_write_suspend_umnt().

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vfs_write_suspend_umnt()

int vfs_write_suspend_umnt

(

struct mount *

mp

)

Definition at line 2147 of file vfs_vnops.c.

References vfs_write_suspend(), vn_finished_write(), vn_start_write(), and wakeup().

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vn_bmap_seekhole()

int vn_bmap_seekhole	(	struct vnode *	vp,
		u_long	cmd,
		off_t *	off,
		struct ucred *	cred
	)

Definition at line 2520 of file vfs_vnops.c.

References vn_bmap_seekhole_locked().

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vn_bmap_seekhole_locked()

int vn_bmap_seekhole_locked	(	struct vnode *	vp,
		u_long	cmd,
		off_t *	off,
		struct ucred *	cred
	)

Definition at line 2467 of file vfs_vnops.c.

Referenced by vn_bmap_seekhole(), and vop_stddeallocate().

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vn_chmod()

int vn_chmod	(	struct file *	fp,
		mode_t	mode,
		struct ucred *	active_cred,
		struct thread *	td
	)

Definition at line 2403 of file vfs_vnops.c.

References mode, and setfmode().

Referenced by pipe_chmod().

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vn_chown()

int vn_chown	(	struct file *	fp,
		uid_t	uid,
		gid_t	gid,
		struct ucred *	active_cred,
		struct thread *	td
	)

Definition at line 2418 of file vfs_vnops.c.

References setfown().

Referenced by pipe_chown().

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vn_close()

int vn_close	(	struct vnode *	vp,
		int	flags,
		struct ucred *	file_cred,
		struct thread *	td
	)

Definition at line 553 of file vfs_vnops.c.

References flags, and vn_close1().

Referenced by acct_disable(), alq_shutdown(), coredump(), corefile_open_last(), link_elf_ctf_get(), link_elf_load_file(), linker_hints_lookup(), linker_lookup_file(), sys_acct(), sys_ktrace(), vfs_mountroot_readconf(), vnode_close_locked(), and vop_stdvptocnp().

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vn_close1()

static int vn_close1 ( struct vnode *  vp, int  flags, struct ucred *  file_cred, struct thread *  td, bool  keep_ref  )

static

Definition at line 523 of file vfs_vnops.c.

References flags, vn_finished_write(), vn_start_write(), and vput().

Referenced by vn_close(), and vn_closefile().

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vn_closefile()

static int vn_closefile ( struct file *  fp, struct thread *  td  )

static

Definition at line 1821 of file vfs_vnops.c.

References badfileops, vn_close1(), and vrele().

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vn_copy_file_range()

int vn_copy_file_range	(	struct vnode *	invp,
		off_t *	inoffp,
		struct vnode *	outvp,
		off_t *	outoffp,
		size_t *	lenp,
		unsigned int	flags,
		struct ucred *	incred,
		struct ucred *	outcred,
		struct thread *	fsize_td
	)

Definition at line 2943 of file vfs_vnops.c.

References flags, and vn_generic_copy_file_range().

Referenced by kern_copy_file_range().

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vn_deallocate()

int vn_deallocate	(	struct vnode *	vp,
		off_t *	offset,
		off_t *	length,
		int	flags,
		int	ioflag,
		struct ucred *	active_cred,
		struct ucred *	file_cred
	)

Definition at line 3584 of file vfs_vnops.c.

References flags, and vn_deallocate_impl().

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vn_deallocate_impl()

static int vn_deallocate_impl ( struct vnode *  vp, off_t *  offset, off_t *  length, int  flags, int  ioflag, struct ucred *  cred, struct ucred *  active_cred, struct ucred *  file_cred  )

static

Definition at line 3510 of file vfs_vnops.c.

References bwillwrite(), flags, maybe_yield(), vn_finished_write(), vn_lktype_write(), and vn_start_write().

Referenced by vn_deallocate(), and vn_fspacectl().

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vn_extattr_get()

int vn_extattr_get	(	struct vnode *	vp,
		int	ioflg,
		int	attrnamespace,
		const char *	attrname,
		int *	buflen,
		char *	buf,
		struct thread *	td
	)

Definition at line 2199 of file vfs_vnops.c.

References attrnamespace, and buf.

vn_extattr_rm()

int vn_extattr_rm	(	struct vnode *	vp,
		int	ioflg,
		int	attrnamespace,
		const char *	attrname,
		struct thread *	td
	)

Definition at line 2279 of file vfs_vnops.c.

References attrnamespace, vn_finished_write(), and vn_start_write().

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vn_extattr_set()

int vn_extattr_set	(	struct vnode *	vp,
		int	ioflg,
		int	attrnamespace,
		const char *	attrname,
		int	buflen,
		char *	buf,
		struct thread *	td
	)

Definition at line 2240 of file vfs_vnops.c.

References attrnamespace, buf, vn_finished_write(), and vn_start_write().

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vn_fallocate()

static int vn_fallocate ( struct file *  fp, off_t  offset, off_t  len, struct thread *  td  )

static

Definition at line 3452 of file vfs_vnops.c.

References bwillwrite(), maybe_yield(), panic(), vn_finished_write(), and vn_start_write().

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vn_fill_junk()

static void vn_fill_junk ( struct kinfo_file *  kif )

inlinestatic

Definition at line 2650 of file vfs_vnops.c.

Referenced by vn_fill_kinfo_vnode().

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vn_fill_kinfo()

int vn_fill_kinfo	(	struct file *	fp,
		struct kinfo_file *	kif,
		struct filedesc *	fdp
	)

Definition at line 2631 of file vfs_vnops.c.

References vn_fill_kinfo_vnode(), vref(), and vrele().

Referenced by pipe_fill_kinfo().

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vn_fill_kinfo_vnode()

int vn_fill_kinfo_vnode	(	struct vnode *	vp,
		struct kinfo_file *	kif
	)

Definition at line 2668 of file vfs_vnops.c.

References free(), vn_fill_junk(), vn_fullpath(), and vntype_to_kinfo().

Referenced by export_vnode_to_kinfo(), and vn_fill_kinfo().

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vn_finished_secondary_write()

void vn_finished_secondary_write

(

struct mount *

mp

)

Definition at line 2046 of file vfs_vnops.c.

References panic(), and wakeup().

Referenced by vgonel().

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vn_finished_write()

void vn_finished_write

(

struct mount *

mp

)

Definition at line 2009 of file vfs_vnops.c.

References wakeup().

Referenced by aio_fsync_vnode(), alq_doio(), core_output(), dounmount(), dounmount_cleanup(), extattr_delete_vp(), extattr_set_vp(), flushbufqueues(), kern_frmdirat(), kern_fsync(), kern_funlinkat(), kern_linkat_vp(), kern_mkdirat(), kern_mkfifoat(), kern_mknodat(), kern_renameat(), kern_symlinkat(), kern_sync(), kern_truncate(), setfflags(), setfmode(), setfown(), setutimes(), sync_vnode(), sys_extattrctl(), sys_undelete(), uipc_bindat(), vacl_delete(), vacl_set_acl(), vfs_domount_first(), vfs_write_suspend_umnt(), vlrureclaim(), vn_close1(), vn_deallocate_impl(), vn_extattr_rm(), vn_extattr_set(), vn_fallocate(), vn_generic_copy_file_range(), vn_open_cred(), vn_rdwr(), vn_truncate(), vn_write(), vn_write_outvp(), and vtryrecycle().

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vn_fsid()

void vn_fsid	(	struct vnode *	vp,
		struct vattr *	va
	)

Definition at line 2829 of file vfs_vnops.c.

vn_fspacectl()

static int vn_fspacectl ( struct file *  fp, int  cmd, off_t *  offset, off_t *  length, int  flags, struct ucred *  active_cred, struct thread *  td  )

static

Definition at line 3601 of file vfs_vnops.c.

References flags, get_write_ioflag(), panic(), and vn_deallocate_impl().

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vn_fsync_buf()

int vn_fsync_buf	(	struct vnode *	vp,
		int	waitfor
	)

Definition at line 2840 of file vfs_vnops.c.

References bawrite(), bremfree(), buf, bufobj_wwait(), hz, panic(), vfs_bio_awrite(), and vn_printf().

Referenced by vop_stdfdatasync_buf(), and vop_stdfsync().

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vn_generic_copy_file_range()

int vn_generic_copy_file_range	(	struct vnode *	invp,
		off_t *	inoffp,
		struct vnode *	outvp,
		off_t *	outoffp,
		size_t *	lenp,
		unsigned int	flags,
		struct ucred *	incred,
		struct ucred *	outcred,
		struct thread *	fsize_td
	)

Definition at line 3167 of file vfs_vnops.c.

References flags, free(), getnanouptime(), malloc(), mem_iszero(), sig_intr(), vn_finished_write(), vn_rdwr(), vn_rlimit_fsize(), vn_start_write(), vn_truncate_locked(), and vn_write_outvp().

Referenced by vn_copy_file_range(), and vop_stdcopy_file_range().

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vn_get_ino_alloc_vget()

static int vn_get_ino_alloc_vget ( struct mount *  mp, void *  arg, int  lkflags, struct vnode **  rvp  )

static

Definition at line 2308 of file vfs_vnops.c.

Referenced by vn_vget_ino().

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vn_io_fault()

static int vn_io_fault ( struct file *  fp, struct uio *  uio, struct ucred *  active_cred, int  flags, struct thread *  td  )

static

Definition at line 1439 of file vfs_vnops.c.

References vn_io_fault_args::args, do_vn_io_fault(), vn_io_fault_args::doio, flags, foffset_lock_uio(), foffset_unlock_uio(), vn_io_fault_args::fp, priv_check(), vfs_allow_read_dir, vn_io_fault1(), vn_io_fault_args::VN_IO_FAULT_FOP, vn_read, vn_write, and vn_io_fault_args::vp.

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vn_io_fault1()

static int vn_io_fault1 ( struct vnode *  vp, struct uio *  uio, struct vn_io_fault_args *  args, struct thread *  td  )

static

Definition at line 1327 of file vfs_vnops.c.

References addr, cloneuio(), free(), io_hold_cnt, uiomove(), vn_io_fault_doio(), vn_io_fault_prefault, vn_io_fault_prefault_user(), and vn_io_faults_cnt.

Referenced by vn_io_fault(), and vn_rdwr().

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vn_io_fault_doio()

static int vn_io_fault_doio ( struct vn_io_fault_args *  args, struct uio *  uio, struct thread *  td  )

static

Definition at line 1237 of file vfs_vnops.c.

References vn_io_fault_args::args, vn_io_fault_args::cred, vn_io_fault_args::flags, vn_io_fault_args::fop_args, vn_io_fault_args::kind, panic(), and vn_io_fault_args::vop_args.

Referenced by vn_io_fault1().

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vn_io_fault_pgmove()

int vn_io_fault_pgmove	(	vm_page_t	ma[],
		vm_offset_t	offset,
		int	xfersize,
		struct uio *	uio
	)

Definition at line 1564 of file vfs_vnops.c.

Referenced by vn_read_from_obj().

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vn_io_fault_prefault_user()

static int vn_io_fault_prefault_user ( const struct uio *  uio )

static

Definition at line 1278 of file vfs_vnops.c.

References vn_io_fault_touch().

Referenced by vn_io_fault1().

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vn_io_fault_touch()

static int vn_io_fault_touch ( char *  base, const struct uio *  uio  )

static

Definition at line 1267 of file vfs_vnops.c.

Referenced by vn_io_fault_prefault_user().

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vn_io_fault_uiomove()

int vn_io_fault_uiomove	(	char *	data,
		int	xfersize,
		struct uio *	uio
	)

Definition at line 1508 of file vfs_vnops.c.

References data, and uiomove().

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vn_ioctl()

static int vn_ioctl ( struct file *  fp, u_long  com, void *  data, struct ucred *  active_cred, struct thread *  td  )

static

Definition at line 1689 of file vfs_vnops.c.

References data.

vn_kqfilter()

static int vn_kqfilter ( struct file *  fp, struct knote *  kn  )

static

Definition at line 2179 of file vfs_vnops.c.

vn_kqfilter_opath()

int vn_kqfilter_opath	(	struct file *	fp,
		struct knote *	kn
	)

Definition at line 2186 of file vfs_vnops.c.

References vn_kqfilter.

vn_lktype_write()

int vn_lktype_write	(	struct mount *	mp,
		struct vnode *	vp
	)

Definition at line 3724 of file vfs_vnops.c.

Referenced by kern_fsync(), vn_deallocate_impl(), vn_rdwr(), vn_write(), and vn_write_outvp().

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vn_lock_pair()

void vn_lock_pair	(	struct vnode *	vp1,
		bool	vp1_locked,
		struct vnode *	vp2,
		bool	vp2_locked
	)

Definition at line 3659 of file vfs_vnops.c.

References vn_lock_pair_pause().

Referenced by vfs_domount_first().

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vn_lock_pair_pause()

static void vn_lock_pair_pause ( const char *  wmesg )

static

Definition at line 3641 of file vfs_vnops.c.

References prng32_bounded(), vn_lock_pair_pause_cnt, and vn_lock_pair_pause_max.

Referenced by vn_lock_pair().

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vn_mmap()

int vn_mmap	(	struct file *	fp,
		vm_map_t	map,
		vm_offset_t *	addr,
		vm_size_t	size,
		vm_prot_t	prot,
		vm_prot_t	cap_maxprot,
		int	flags,
		vm_ooffset_t	foff,
		struct thread *	td
	)

Definition at line 2715 of file vfs_vnops.c.

References addr, and flags.

vn_open()

int vn_open	(	struct nameidata *	ndp,
		int *	flagp,
		int	cmode,
		struct file *	fp
	)

Definition at line 191 of file vfs_vnops.c.

References vn_open_cred().

Referenced by kern_openat(), link_elf_ctf_get(), link_elf_load_file(), linker_hints_lookup(), linker_lookup_file(), sys_acct(), sys_ktrace(), and vfs_mountroot_readconf().

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vn_open_cred()

int vn_open_cred	(	struct nameidata *	ndp,
		int *	flagp,
		int	cmode,
		u_int	vn_open_flags,
		struct ucred *	cred,
		struct file *	fp
	)

Definition at line 228 of file vfs_vnops.c.

References bwillwrite(), namei(), NDFREE(), open2nameif(), vn_finished_write(), vn_open_vnode(), vn_start_write(), vput(), vrele(), and wakeup().

Referenced by alq_open_flags(), corefile_open(), corefile_open_last(), vn_open(), and vop_stdvptocnp().

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vn_open_vnode()

int vn_open_vnode	(	struct vnode *	vp,
		int	fmode,
		struct ucred *	cred,
		struct thread *	td,
		struct file *	fp
	)

Definition at line 391 of file vfs_vnops.c.

References accmode, badfileops, vn_open_vnode_advlock(), vnops, and vref().

Referenced by kern_fhopen(), and vn_open_cred().

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vn_open_vnode_advlock()

static int vn_open_vnode_advlock ( struct vnode *  vp, int  fmode, struct file *  fp  )

static

Definition at line 354 of file vfs_vnops.c.

References type.

Referenced by vn_open_vnode().

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vn_pages_remove()

void vn_pages_remove	(	struct vnode *	vp,
		vm_pindex_t	start,
		vm_pindex_t	end
	)

Definition at line 2437 of file vfs_vnops.c.

References start.

Referenced by v_inval_buf_range().

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vn_pages_remove_valid()

void vn_pages_remove_valid	(	struct vnode *	vp,
		vm_pindex_t	start,
		vm_pindex_t	end
	)

Definition at line 2455 of file vfs_vnops.c.

References start.

vn_poll()

static int vn_poll ( struct file *  fp, int  events, struct ucred *  active_cred, struct thread *  td  )

static

Definition at line 1741 of file vfs_vnops.c.

vn_rdwr()

int vn_rdwr	(	enum uio_rw	rw,
		struct vnode *	vp,
		void *	base,
		int	len,
		off_t	offset,
		enum uio_seg	segflg,
		int	ioflg,
		struct ucred *	active_cred,
		struct ucred *	file_cred,
		ssize_t *	aresid,
		struct thread *	td
	)

Definition at line 614 of file vfs_vnops.c.

References vn_io_fault_args::args, vn_io_fault_args::cred, do_vn_io_fault(), vn_finished_write(), vn_io_fault1(), vn_io_fault_args::VN_IO_FAULT_VOP, vn_lktype_write(), vn_start_write(), and vn_io_fault_args::vp.

Referenced by acct_process(), get_interp(), link_elf_ctf_get(), link_elf_load_file(), linker_hints_lookup(), parse_notes(), vfs_mountroot_readconf(), vn_generic_copy_file_range(), vn_rdwr_inchunks(), and vn_write_outvp().

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vn_rdwr_inchunks()

int vn_rdwr_inchunks	(	enum uio_rw	rw,
		struct vnode *	vp,
		void *	base,
		size_t	len,
		off_t	offset,
		enum uio_seg	segflg,
		int	ioflg,
		struct ucred *	active_cred,
		struct ucred *	file_cred,
		size_t *	aresid,
		struct thread *	td
	)

Definition at line 718 of file vfs_vnops.c.

References bwillwrite(), kern_yield(), vn_rdwr(), and vn_io_fault_args::vp.

Referenced by core_write().

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vn_read()

static int vn_read ( struct file *  fp, struct uio *  uio, struct ucred *  active_cred, int  flags, struct thread *  td  )

static

Definition at line 1059 of file vfs_vnops.c.

References flags, get_advice(), sequential_heuristic(), and vn_io_pgcache_read_enable.

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vn_read_from_obj()

int vn_read_from_obj	(	struct vnode *	vp,
		struct uio *	uio
	)

Definition at line 949 of file vfs_vnops.c.

References io_hold_cnt, and vn_io_fault_pgmove().

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vn_rlimit_fsize()

int vn_rlimit_fsize	(	const struct vnode *	vp,
		const struct uio *	uio,
		struct thread *	td
	)

Definition at line 2367 of file vfs_vnops.c.

References kern_psignal(), and lim_cur().

Referenced by vn_generic_copy_file_range().

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vn_seek()

int vn_seek	(	struct file *	fp,
		off_t	offset,
		int	whence,
		struct thread *	td
	)

Definition at line 2535 of file vfs_vnops.c.

References foffset_lock(), and foffset_unlock().

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vn_skip_hole()

static off_t vn_skip_hole ( struct vnode *  outvp, off_t  xfer2, off_t *  outoffp, off_t *  xferp, off_t *  dataoffp, off_t *  holeoffp, struct ucred *  cred  )

static

Definition at line 3025 of file vfs_vnops.c.

Referenced by vn_write_outvp().

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vn_start_secondary_write()

int vn_start_secondary_write	(	struct vnode *	vp,
		struct mount **	mpp,
		int	flags
	)

Definition at line 1946 of file vfs_vnops.c.

References flags, and vfs_rel().

Referenced by vgonel().

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vn_start_write()

int vn_start_write	(	struct vnode *	vp,
		struct mount **	mpp,
		int	flags
	)

Definition at line 1901 of file vfs_vnops.c.

References flags, vfs_ref(), and vn_start_write_refed().

Referenced by aio_fsync_vnode(), alq_doio(), core_output(), dounmount(), extattr_delete_vp(), extattr_set_vp(), flushbufqueues(), kern_frmdirat(), kern_fsync(), kern_funlinkat(), kern_linkat_vp(), kern_mkdirat(), kern_mkfifoat(), kern_mknodat(), kern_renameat(), kern_symlinkat(), kern_sync(), kern_truncate(), setfflags(), setfmode(), setfown(), setutimes(), sync_vnode(), sys_extattrctl(), sys_undelete(), uipc_bindat(), vacl_delete(), vacl_set_acl(), vfs_domount_first(), vfs_write_suspend_umnt(), vlrureclaim(), vn_close1(), vn_deallocate_impl(), vn_extattr_rm(), vn_extattr_set(), vn_fallocate(), vn_generic_copy_file_range(), vn_open_cred(), vn_rdwr(), vn_truncate(), vn_write(), vn_write_outvp(), and vtryrecycle().

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vn_start_write_refed()

static int vn_start_write_refed ( struct mount *  mp, int  flags, bool  mplocked  )

static

Definition at line 1852 of file vfs_vnops.c.

References flags.

Referenced by vfs_write_resume(), and vn_start_write().

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vn_statfile()

int vn_statfile	(	struct file *	fp,
		struct stat *	sb,
		struct ucred *	active_cred
	)

Definition at line 1673 of file vfs_vnops.c.

vn_truncate()

static int vn_truncate ( struct file *  fp, off_t  length, struct ucred *  active_cred, struct thread *  td  )

static

Definition at line 1605 of file vfs_vnops.c.

References vn_finished_write(), vn_start_write(), and vn_truncate_locked().

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vn_truncate_locked()

int vn_truncate_locked	(	struct vnode *	vp,
		off_t	length,
		bool	sync,
		struct ucred *	cred
	)

Definition at line 1651 of file vfs_vnops.c.

Referenced by core_output(), vn_generic_copy_file_range(), vn_truncate(), and vn_write_outvp().

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vn_utimes_perm()

int vn_utimes_perm	(	struct vnode *	vp,
		struct vattr *	vap,
		struct ucred *	cred,
		struct thread *	td
	)

Definition at line 2608 of file vfs_vnops.c.

vn_vget_ino()

int vn_vget_ino	(	struct vnode *	vp,
		ino_t	ino,
		int	lkflags,
		struct vnode **	rvp
	)

Definition at line 2316 of file vfs_vnops.c.

References vn_get_ino_alloc_vget(), and vn_vget_ino_gen().

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vn_vget_ino_gen()

int vn_vget_ino_gen	(	struct vnode *	vp,
		vn_get_ino_t	alloc,
		void *	alloc_arg,
		int	lkflags,
		struct vnode **	rvp
	)

Definition at line 2324 of file vfs_vnops.c.

References vfs_busy(), vfs_ref(), vfs_rel(), vfs_unbusy(), vput(), and vunref().

Referenced by vn_vget_ino().

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vn_write()

static int vn_write ( struct file *  fp, struct uio *  uio, struct ucred *  active_cred, int  flags, struct thread *  td  )

static

Definition at line 1130 of file vfs_vnops.c.

References bwillwrite(), flags, get_advice(), get_write_ioflag(), sequential_heuristic(), vn_finished_write(), vn_lktype_write(), and vn_start_write().

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vn_write_outvp()

static int vn_write_outvp ( struct vnode *  outvp, char *  dat, off_t  outoff, off_t  xfer, u_long  blksize, bool  growfile, bool  checkhole, struct ucred *  cred  )

static

Definition at line 3100 of file vfs_vnops.c.

References bwillwrite(), vn_finished_write(), vn_lktype_write(), vn_rdwr(), vn_skip_hole(), vn_start_write(), and vn_truncate_locked().

Referenced by vn_generic_copy_file_range().

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vn_writechk()

int vn_writechk

(

struct vnode *

vp

)

Definition at line 504 of file vfs_vnops.c.

Referenced by kern_truncate(), and vn_access().

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Variable Documentation

io_hold_cnt

const u_int io_hold_cnt = 16

Definition at line 131 of file vfs_vnops.c.

Referenced by vn_io_fault1(), and vn_read_from_obj().

vfs_allow_read_dir

int vfs_allow_read_dir = 0

static

Definition at line 146 of file vfs_vnops.c.

Referenced by vn_io_fault().

vn_closefile

fo_close_t vn_closefile

static

Definition at line 106 of file vfs_vnops.c.

vn_fallocate

fo_fallocate_t vn_fallocate

static

Definition at line 108 of file vfs_vnops.c.

vn_fspacectl

fo_fspacectl_t vn_fspacectl

static

Definition at line 109 of file vfs_vnops.c.

vn_io_fault

fo_rdwr_t vn_io_fault

static

Definition at line 101 of file vfs_vnops.c.

vn_io_fault_enable

int vn_io_fault_enable = 1

static

Definition at line 132 of file vfs_vnops.c.

Referenced by do_vn_io_fault().

vn_io_fault_prefault

int vn_io_fault_prefault = 0

static

Definition at line 135 of file vfs_vnops.c.

Referenced by vn_io_fault1().

vn_io_faults_cnt

u_long vn_io_faults_cnt

static

Definition at line 142 of file vfs_vnops.c.

Referenced by vn_io_fault1().

vn_io_pgcache_read_enable

int vn_io_pgcache_read_enable = 1

static

Definition at line 138 of file vfs_vnops.c.

Referenced by vn_read().

vn_ioctl

fo_ioctl_t vn_ioctl

static

Definition at line 103 of file vfs_vnops.c.

vn_kqfilter

fo_kqfilter_t vn_kqfilter

static

Definition at line 105 of file vfs_vnops.c.

Referenced by vn_kqfilter_opath().

vn_lock_pair_pause_cnt

u_long vn_lock_pair_pause_cnt

static

Definition at line 3630 of file vfs_vnops.c.

Referenced by vn_lock_pair_pause().

vn_lock_pair_pause_max

u_int vn_lock_pair_pause_max

Definition at line 3635 of file vfs_vnops.c.

Referenced by init_param1(), and vn_lock_pair_pause().

vn_mmap

fo_mmap_t vn_mmap

static

Definition at line 107 of file vfs_vnops.c.

vn_poll

fo_poll_t vn_poll

static

Definition at line 104 of file vfs_vnops.c.

vn_read

fo_rdwr_t vn_read

static

Definition at line 99 of file vfs_vnops.c.

Referenced by vn_io_fault().

vn_truncate

fo_truncate_t vn_truncate

static

Definition at line 102 of file vfs_vnops.c.

vn_write

fo_rdwr_t vn_write

static

Definition at line 100 of file vfs_vnops.c.

Referenced by vn_io_fault().

vnops

struct fileops vnops

Initial value:

= {
        .fo_read = vn_io_fault,
        .fo_write = vn_io_fault,
        .fo_truncate = vn_truncate,
        .fo_ioctl = vn_ioctl,
        .fo_poll = vn_poll,
        .fo_kqfilter = vn_kqfilter,
        .fo_stat = vn_statfile,
        .fo_close = vn_closefile,
        .fo_chmod = vn_chmod,
        .fo_chown = vn_chown,
        .fo_sendfile = vn_sendfile,
        .fo_seek = vn_seek,
        .fo_fill_kinfo = vn_fill_kinfo,
        .fo_mmap = vn_mmap,
        .fo_fallocate = vn_fallocate,
        .fo_fspacectl = vn_fspacectl,
        .fo_flags = DFLAG_PASSABLE | DFLAG_SEEKABLE
}

Definition at line 111 of file vfs_vnops.c.

Referenced by kern_fhopen(), kern_openat(), pipe_close(), pipe_kqfilter(), pipe_stat(), pipe_truncate(), ptsdev_close(), and vn_open_vnode().