Differential D20940 Diff 59886 sys/fs/fuse/fuse_vnops.c

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sys/fs/fuse/fuse_vnops.c

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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY		* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT		* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE		* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.		* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*		*
* Copyright (C) 2005 Csaba Henk.		* Copyright (C) 2005 Csaba Henk.
* All rights reserved.		* All rights reserved.
*		*
		* Copyright (c) 2019 The FreeBSD Foundation
		*
		* Portions of this software were developed by BFF Storage Systems, LLC under
		* sponsorship from the FreeBSD Foundation.
		*
* Redistribution and use in source and binary forms, with or without		* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions		* modification, are permitted provided that the following conditions
* are met:		* are met:
* 1. Redistributions of source code must retain the above copyright		* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.		* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright		* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the		* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.		* documentation and/or other materials provided with the distribution.
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#include <vm/vnode_pager.h>		#include <vm/vnode_pager.h>
#include <vm/vm_object.h>		#include <vm/vm_object.h>

#include "fuse.h"		#include "fuse.h"
#include "fuse_file.h"		#include "fuse_file.h"
#include "fuse_internal.h"		#include "fuse_internal.h"
#include "fuse_ipc.h"		#include "fuse_ipc.h"
#include "fuse_node.h"		#include "fuse_node.h"
#include "fuse_param.h"
#include "fuse_io.h"		#include "fuse_io.h"

#include <sys/priv.h>		#include <sys/priv.h>

SDT_PROVIDER_DECLARE(fuse);		/* Maximum number of hardlinks to a single FUSE file */
		#define FUSE_LINK_MAX UINT32_MAX

		SDT_PROVIDER_DECLARE(fusefs);
/*		/*
* Fuse trace probe:		* Fuse trace probe:
* arg0: verbosity. Higher numbers give more verbose messages		* arg0: verbosity. Higher numbers give more verbose messages
* arg1: Textual message		* arg1: Textual message
*/		*/
SDT_PROBE_DEFINE2(fuse, , vnops, trace, "int", "char*");		SDT_PROBE_DEFINE2(fusefs, , vnops, trace, "int", "char*");

/* vnode ops */		/* vnode ops */
static vop_access_t fuse_vnop_access;		static vop_access_t fuse_vnop_access;
		static vop_advlock_t fuse_vnop_advlock;
		static vop_bmap_t fuse_vnop_bmap;
		static vop_close_t fuse_fifo_close;
static vop_close_t fuse_vnop_close;		static vop_close_t fuse_vnop_close;
static vop_create_t fuse_vnop_create;		static vop_create_t fuse_vnop_create;
static vop_deleteextattr_t fuse_vnop_deleteextattr;		static vop_deleteextattr_t fuse_vnop_deleteextattr;
		static vop_fdatasync_t fuse_vnop_fdatasync;
static vop_fsync_t fuse_vnop_fsync;		static vop_fsync_t fuse_vnop_fsync;
static vop_getattr_t fuse_vnop_getattr;		static vop_getattr_t fuse_vnop_getattr;
static vop_getextattr_t fuse_vnop_getextattr;		static vop_getextattr_t fuse_vnop_getextattr;
static vop_inactive_t fuse_vnop_inactive;		static vop_inactive_t fuse_vnop_inactive;
static vop_link_t fuse_vnop_link;		static vop_link_t fuse_vnop_link;
static vop_listextattr_t fuse_vnop_listextattr;		static vop_listextattr_t fuse_vnop_listextattr;
static vop_lookup_t fuse_vnop_lookup;		static vop_lookup_t fuse_vnop_lookup;
static vop_mkdir_t fuse_vnop_mkdir;		static vop_mkdir_t fuse_vnop_mkdir;
static vop_mknod_t fuse_vnop_mknod;		static vop_mknod_t fuse_vnop_mknod;
static vop_open_t fuse_vnop_open;		static vop_open_t fuse_vnop_open;
static vop_pathconf_t fuse_vnop_pathconf;		static vop_pathconf_t fuse_vnop_pathconf;
static vop_read_t fuse_vnop_read;		static vop_read_t fuse_vnop_read;
static vop_readdir_t fuse_vnop_readdir;		static vop_readdir_t fuse_vnop_readdir;
static vop_readlink_t fuse_vnop_readlink;		static vop_readlink_t fuse_vnop_readlink;
static vop_reclaim_t fuse_vnop_reclaim;		static vop_reclaim_t fuse_vnop_reclaim;
static vop_remove_t fuse_vnop_remove;		static vop_remove_t fuse_vnop_remove;
static vop_rename_t fuse_vnop_rename;		static vop_rename_t fuse_vnop_rename;
static vop_rmdir_t fuse_vnop_rmdir;		static vop_rmdir_t fuse_vnop_rmdir;
static vop_setattr_t fuse_vnop_setattr;		static vop_setattr_t fuse_vnop_setattr;
static vop_setextattr_t fuse_vnop_setextattr;		static vop_setextattr_t fuse_vnop_setextattr;
static vop_strategy_t fuse_vnop_strategy;		static vop_strategy_t fuse_vnop_strategy;
static vop_symlink_t fuse_vnop_symlink;		static vop_symlink_t fuse_vnop_symlink;
static vop_write_t fuse_vnop_write;		static vop_write_t fuse_vnop_write;
static vop_getpages_t fuse_vnop_getpages;		static vop_getpages_t fuse_vnop_getpages;
static vop_putpages_t fuse_vnop_putpages;
static vop_print_t fuse_vnop_print;		static vop_print_t fuse_vnop_print;
		static vop_vptofh_t fuse_vnop_vptofh;

		struct vop_vector fuse_fifoops = {
		.vop_default = &fifo_specops,
		.vop_access = fuse_vnop_access,
		.vop_close = fuse_fifo_close,
		.vop_fsync = fuse_vnop_fsync,
		.vop_getattr = fuse_vnop_getattr,
		.vop_inactive = fuse_vnop_inactive,
		.vop_pathconf = fuse_vnop_pathconf,
		.vop_print = fuse_vnop_print,
		.vop_read = VOP_PANIC,
		.vop_reclaim = fuse_vnop_reclaim,
		.vop_setattr = fuse_vnop_setattr,
		.vop_write = VOP_PANIC,
		.vop_vptofh = fuse_vnop_vptofh,
		};

struct vop_vector fuse_vnops = {		struct vop_vector fuse_vnops = {
		.vop_allocate = VOP_EINVAL,
.vop_default = &default_vnodeops,		.vop_default = &default_vnodeops,
.vop_access = fuse_vnop_access,		.vop_access = fuse_vnop_access,
		.vop_advlock = fuse_vnop_advlock,
		.vop_bmap = fuse_vnop_bmap,
.vop_close = fuse_vnop_close,		.vop_close = fuse_vnop_close,
.vop_create = fuse_vnop_create,		.vop_create = fuse_vnop_create,
.vop_deleteextattr = fuse_vnop_deleteextattr,		.vop_deleteextattr = fuse_vnop_deleteextattr,
.vop_fsync = fuse_vnop_fsync,		.vop_fsync = fuse_vnop_fsync,
		.vop_fdatasync = fuse_vnop_fdatasync,
.vop_getattr = fuse_vnop_getattr,		.vop_getattr = fuse_vnop_getattr,
.vop_getextattr = fuse_vnop_getextattr,		.vop_getextattr = fuse_vnop_getextattr,
.vop_inactive = fuse_vnop_inactive,		.vop_inactive = fuse_vnop_inactive,
		/*
		* TODO: implement vop_ioctl after upgrading to protocol 7.16.
		* FUSE_IOCTL was added in 7.11, but 32-bit compat is broken until
		* 7.16.
		*/
.vop_link = fuse_vnop_link,		.vop_link = fuse_vnop_link,
.vop_listextattr = fuse_vnop_listextattr,		.vop_listextattr = fuse_vnop_listextattr,
.vop_lookup = fuse_vnop_lookup,		.vop_lookup = fuse_vnop_lookup,
.vop_mkdir = fuse_vnop_mkdir,		.vop_mkdir = fuse_vnop_mkdir,
.vop_mknod = fuse_vnop_mknod,		.vop_mknod = fuse_vnop_mknod,
.vop_open = fuse_vnop_open,		.vop_open = fuse_vnop_open,
.vop_pathconf = fuse_vnop_pathconf,		.vop_pathconf = fuse_vnop_pathconf,
		/*
		* TODO: implement vop_poll after upgrading to protocol 7.21.
		* FUSE_POLL was added in protocol 7.11, but it's kind of broken until
		* 7.21, which adds the ability for the client to choose which poll
		* events it wants, and for a client to deregister a file handle
		*/
.vop_read = fuse_vnop_read,		.vop_read = fuse_vnop_read,
.vop_readdir = fuse_vnop_readdir,		.vop_readdir = fuse_vnop_readdir,
.vop_readlink = fuse_vnop_readlink,		.vop_readlink = fuse_vnop_readlink,
.vop_reclaim = fuse_vnop_reclaim,		.vop_reclaim = fuse_vnop_reclaim,
.vop_remove = fuse_vnop_remove,		.vop_remove = fuse_vnop_remove,
.vop_rename = fuse_vnop_rename,		.vop_rename = fuse_vnop_rename,
.vop_rmdir = fuse_vnop_rmdir,		.vop_rmdir = fuse_vnop_rmdir,
.vop_setattr = fuse_vnop_setattr,		.vop_setattr = fuse_vnop_setattr,
.vop_setextattr = fuse_vnop_setextattr,		.vop_setextattr = fuse_vnop_setextattr,
.vop_strategy = fuse_vnop_strategy,		.vop_strategy = fuse_vnop_strategy,
.vop_symlink = fuse_vnop_symlink,		.vop_symlink = fuse_vnop_symlink,
.vop_write = fuse_vnop_write,		.vop_write = fuse_vnop_write,
.vop_getpages = fuse_vnop_getpages,		.vop_getpages = fuse_vnop_getpages,
.vop_putpages = fuse_vnop_putpages,
.vop_print = fuse_vnop_print,		.vop_print = fuse_vnop_print,
		.vop_vptofh = fuse_vnop_vptofh,
};		};

static u_long fuse_lookup_cache_hits = 0;		uma_zone_t fuse_pbuf_zone;

SYSCTL_ULONG(_vfs_fusefs, OID_AUTO, lookup_cache_hits, CTLFLAG_RD,		#define fuse_vm_page_lock(m) vm_page_lock((m));
&fuse_lookup_cache_hits, 0, "number of positive cache hits in lookup");		#define fuse_vm_page_unlock(m) vm_page_unlock((m));
		#define fuse_vm_page_lock_queues() ((void)0)
		#define fuse_vm_page_unlock_queues() ((void)0)

static u_long fuse_lookup_cache_misses = 0;		/* Check permission for extattr operations, much like extattr_check_cred */
		static int
		fuse_extattr_check_cred(struct vnode vp, int ns, struct ucred cred,
		struct thread *td, accmode_t accmode)
		{
		struct mount *mp = vnode_mount(vp);
		struct fuse_data *data = fuse_get_mpdata(mp);

SYSCTL_ULONG(_vfs_fusefs, OID_AUTO, lookup_cache_misses, CTLFLAG_RD,		/*
&fuse_lookup_cache_misses, 0, "number of cache misses in lookup");		* Kernel-invoked always succeeds.
		*/
		if (cred == NOCRED)
		return (0);

int fuse_lookup_cache_enable = 1;		/*
		* Do not allow privileged processes in jail to directly manipulate
		* system attributes.
		*/
		switch (ns) {
		case EXTATTR_NAMESPACE_SYSTEM:
		if (data->dataflags & FSESS_DEFAULT_PERMISSIONS) {
		return (priv_check_cred(cred, PRIV_VFS_EXTATTR_SYSTEM));
		}
		/* FALLTHROUGH */
		case EXTATTR_NAMESPACE_USER:
		return (fuse_internal_access(vp, accmode, td, cred));
		default:
		return (EPERM);
		}
		}

SYSCTL_INT(_vfs_fusefs, OID_AUTO, lookup_cache_enable, CTLFLAG_RW,		/* Get a filehandle for a directory */
&fuse_lookup_cache_enable, 0, "if non-zero, enable lookup cache");		static int
		fuse_filehandle_get_dir(struct vnode vp, struct fuse_filehandle *fufhp,
		struct ucred *cred, pid_t pid)
		{
		if (fuse_filehandle_get(vp, FREAD, fufhp, cred, pid) == 0)
		return 0;
		return fuse_filehandle_get(vp, FEXEC, fufhp, cred, pid);
		}

		/* Send FUSE_FLUSH for this vnode */
		static int
		fuse_flush(struct vnode vp, struct ucred cred, pid_t pid, int fflag)
		{
		struct fuse_flush_in *ffi;
		struct fuse_filehandle *fufh;
		struct fuse_dispatcher fdi;
		struct thread *td = curthread;
		struct mount *mp = vnode_mount(vp);
		int err;

		if (!fsess_isimpl(vnode_mount(vp), FUSE_FLUSH))
		return 0;

		err = fuse_filehandle_getrw(vp, fflag, &fufh, cred, pid);
		if (err)
		return err;

		fdisp_init(&fdi, sizeof(*ffi));
		fdisp_make_vp(&fdi, FUSE_FLUSH, vp, td, cred);
		ffi = fdi.indata;
		ffi->fh = fufh->fh_id;
/*		/*
* XXX: This feature is highly experimental and can bring to instabilities,		* If the file has a POSIX lock then we're supposed to set lock_owner.
* needs revisiting before to be enabled by default.		* If not, then lock_owner is undefined. So we may as well always set
		* it.
*/		*/
static int fuse_reclaim_revoked = 0;		ffi->lock_owner = td->td_proc->p_pid;

SYSCTL_INT(_vfs_fusefs, OID_AUTO, reclaim_revoked, CTLFLAG_RW,		err = fdisp_wait_answ(&fdi);
&fuse_reclaim_revoked, 0, "");		if (err == ENOSYS) {
		fsess_set_notimpl(mp, FUSE_FLUSH);
		err = 0;
		}
		fdisp_destroy(&fdi);
		return err;
		}

uma_zone_t fuse_pbuf_zone;		/* Close wrapper for fifos. */
		static int
		fuse_fifo_close(struct vop_close_args *ap)
		{
		return (fifo_specops.vop_close(ap));
		}

#define fuse_vm_page_lock(m) vm_page_lock((m));
#define fuse_vm_page_unlock(m) vm_page_unlock((m));
#define fuse_vm_page_lock_queues() ((void)0)
#define fuse_vm_page_unlock_queues() ((void)0)

/*		/*
struct vnop_access_args {		struct vnop_access_args {
struct vnode *a_vp;		struct vnode *a_vp;
#if VOP_ACCESS_TAKES_ACCMODE_T		#if VOP_ACCESS_TAKES_ACCMODE_T
accmode_t a_accmode;		accmode_t a_accmode;
#else		#else
int a_mode;		int a_mode;
#endif		#endif
struct ucred *a_cred;		struct ucred *a_cred;
struct thread *a_td;		struct thread *a_td;
};		};
*/		*/
static int		static int
fuse_vnop_access(struct vop_access_args *ap)		fuse_vnop_access(struct vop_access_args *ap)
{		{
struct vnode *vp = ap->a_vp;		struct vnode *vp = ap->a_vp;
int accmode = ap->a_accmode;		int accmode = ap->a_accmode;
struct ucred *cred = ap->a_cred;		struct ucred *cred = ap->a_cred;

struct fuse_access_param facp;
struct fuse_data *data = fuse_get_mpdata(vnode_mount(vp));		struct fuse_data *data = fuse_get_mpdata(vnode_mount(vp));

int err;		int err;

if (fuse_isdeadfs(vp)) {		if (fuse_isdeadfs(vp)) {
if (vnode_isvroot(vp)) {		if (vnode_isvroot(vp)) {
return 0;		return 0;
}		}
return ENXIO;		return ENXIO;
}		}
if (!(data->dataflags & FSESS_INITED)) {		if (!(data->dataflags & FSESS_INITED)) {
if (vnode_isvroot(vp)) {		if (vnode_isvroot(vp)) {
if (priv_check_cred(cred, PRIV_VFS_ADMIN) \|\|		if (priv_check_cred(cred, PRIV_VFS_ADMIN) \|\|
(fuse_match_cred(data->daemoncred, cred) == 0)) {		(fuse_match_cred(data->daemoncred, cred) == 0)) {
return 0;		return 0;
}		}
}		}
return EBADF;		return EBADF;
}		}
if (vnode_islnk(vp)) {		if (vnode_islnk(vp)) {
return 0;		return 0;
}		}
bzero(&facp, sizeof(facp));

err = fuse_internal_access(vp, accmode, &facp, ap->a_td, ap->a_cred);		err = fuse_internal_access(vp, accmode, ap->a_td, ap->a_cred);
return err;		return err;
}		}

/*		/*
struct vnop_close_args {		* struct vop_advlock_args {
		* struct vop_generic_args a_gen;
		* struct vnode *a_vp;
		* void *a_id;
		* int a_op;
		* struct flock *a_fl;
		* int a_flags;
		* }
		*/
		static int
		fuse_vnop_advlock(struct vop_advlock_args *ap)
		{
		struct vnode *vp = ap->a_vp;
		struct flock *fl = ap->a_fl;
		struct thread *td = curthread;
		struct ucred *cred = td->td_ucred;
		pid_t pid = td->td_proc->p_pid;
		struct fuse_filehandle *fufh;
		struct fuse_dispatcher fdi;
		struct fuse_lk_in *fli;
		struct fuse_lk_out *flo;
		enum fuse_opcode op;
		int dataflags, err;
		int flags = ap->a_flags;

		dataflags = fuse_get_mpdata(vnode_mount(vp))->dataflags;

		if (fuse_isdeadfs(vp)) {
		return ENXIO;
		}

		if (!(dataflags & FSESS_POSIX_LOCKS))
		return vop_stdadvlock(ap);
		/* FUSE doesn't properly support flock until protocol 7.17 */
		if (flags & F_FLOCK)
		return vop_stdadvlock(ap);

		err = fuse_filehandle_get_anyflags(vp, &fufh, cred, pid);
		if (err)
		return err;

		fdisp_init(&fdi, sizeof(*fli));

		switch(ap->a_op) {
		case F_GETLK:
		op = FUSE_GETLK;
		break;
		case F_SETLK:
		op = FUSE_SETLK;
		break;
		case F_SETLKW:
		op = FUSE_SETLKW;
		break;
		default:
		return EINVAL;
		}

		fdisp_make_vp(&fdi, op, vp, td, cred);
		fli = fdi.indata;
		fli->fh = fufh->fh_id;
		fli->owner = fl->l_pid;
		fli->lk.start = fl->l_start;
		if (fl->l_len != 0)
		fli->lk.end = fl->l_start + fl->l_len - 1;
		else
		fli->lk.end = INT64_MAX;
		fli->lk.type = fl->l_type;
		fli->lk.pid = fl->l_pid;

		err = fdisp_wait_answ(&fdi);
		fdisp_destroy(&fdi);

		if (err == 0 && op == FUSE_GETLK) {
		flo = fdi.answ;
		fl->l_type = flo->lk.type;
		fl->l_pid = flo->lk.pid;
		if (flo->lk.type != F_UNLCK) {
		fl->l_start = flo->lk.start;
		if (flo->lk.end == INT64_MAX)
		fl->l_len = 0;
		else
		fl->l_len = flo->lk.end - flo->lk.start + 1;
		fl->l_start = flo->lk.start;
		}
		}

		return err;
		}

		/* {
struct vnode *a_vp;		struct vnode *a_vp;
		daddr_t a_bn;
		struct bufobj **a_bop;
		daddr_t *a_bnp;
		int *a_runp;
		int *a_runb;
		} */
		static int
		fuse_vnop_bmap(struct vop_bmap_args *ap)
		{
		struct vnode *vp = ap->a_vp;
		struct bufobj **bo = ap->a_bop;
		struct thread *td = curthread;
		struct mount *mp;
		struct fuse_dispatcher fdi;
		struct fuse_bmap_in *fbi;
		struct fuse_bmap_out *fbo;
		struct fuse_data *data;
		uint64_t biosize;
		off_t filesize;
		daddr_t lbn = ap->a_bn;
		daddr_t *pbn = ap->a_bnp;
		int *runp = ap->a_runp;
		int *runb = ap->a_runb;
		int error = 0;
		int maxrun;

		if (fuse_isdeadfs(vp)) {
		return ENXIO;
		}

		mp = vnode_mount(vp);
		data = fuse_get_mpdata(mp);
		biosize = fuse_iosize(vp);
		maxrun = MIN(vp->v_mount->mnt_iosize_max / biosize - 1,
		data->max_readahead_blocks);

		if (bo != NULL)
		*bo = &vp->v_bufobj;

		/*
		* The FUSE_BMAP operation does not include the runp and runb
		* variables, so we must guess. Report nonzero contiguous runs so
		* cluster_read will combine adjacent reads. It's worthwhile to reduce
		* upcalls even if we don't know the true physical layout of the file.
		*
		* FUSE file systems may opt out of read clustering in two ways:
		* * mounting with -onoclusterr
		* * Setting max_readahead <= maxbcachebuf during FUSE_INIT
		*/
		if (runb != NULL)
		*runb = MIN(lbn, maxrun);
		if (runp != NULL) {
		error = fuse_vnode_size(vp, &filesize, td->td_ucred, td);
		if (error == 0)
		*runp = MIN(MAX(0, filesize / biosize - lbn - 1),
		maxrun);
		else
		*runp = 0;
		}

		if (fsess_isimpl(mp, FUSE_BMAP)) {
		fdisp_init(&fdi, sizeof(*fbi));
		fdisp_make_vp(&fdi, FUSE_BMAP, vp, td, td->td_ucred);
		fbi = fdi.indata;
		fbi->block = lbn;
		fbi->blocksize = biosize;
		error = fdisp_wait_answ(&fdi);
		if (error == ENOSYS) {
		fdisp_destroy(&fdi);
		fsess_set_notimpl(mp, FUSE_BMAP);
		error = 0;
		} else {
		fbo = fdi.answ;
		if (error == 0 && pbn != NULL)
		*pbn = fbo->block;
		fdisp_destroy(&fdi);
		return error;
		}
		}

		/* If the daemon doesn't support BMAP, make up a sensible default */
		if (pbn != NULL)
		pbn = lbn btodb(biosize);
		return (error);
		}

		/*
		struct vop_close_args {
		struct vnode *a_vp;
int a_fflag;		int a_fflag;
struct ucred *a_cred;		struct ucred *a_cred;
struct thread *a_td;		struct thread *a_td;
};		};
*/		*/
static int		static int
fuse_vnop_close(struct vop_close_args *ap)		fuse_vnop_close(struct vop_close_args *ap)
{		{
struct vnode *vp = ap->a_vp;		struct vnode *vp = ap->a_vp;
struct ucred *cred = ap->a_cred;		struct ucred *cred = ap->a_cred;
int fflag = ap->a_fflag;		int fflag = ap->a_fflag;
fufh_type_t fufh_type;		struct thread *td = ap->a_td;
		pid_t pid = td->td_proc->p_pid;
		int err = 0;

if (fuse_isdeadfs(vp)) {		if (fuse_isdeadfs(vp))
return 0;		return 0;
}		if (vnode_isdir(vp))
if (vnode_isdir(vp)) {
if (fuse_filehandle_valid(vp, FUFH_RDONLY)) {
fuse_filehandle_close(vp, FUFH_RDONLY, NULL, cred);
}
return 0;		return 0;
}		if (fflag & IO_NDELAY)
if (fflag & IO_NDELAY) {
return 0;		return 0;
}
fufh_type = fuse_filehandle_xlate_from_fflags(fflag);

if (!fuse_filehandle_valid(vp, fufh_type)) {		err = fuse_flush(vp, cred, pid, fflag);
int i;		/* TODO: close the file handle, if we're sure it's no longer used */

for (i = 0; i < FUFH_MAXTYPE; i++)
if (fuse_filehandle_valid(vp, i))
break;
if (i == FUFH_MAXTYPE)
panic("FUSE: fufh type %d found to be invalid in close"
" (fflag=0x%x)\n",
fufh_type, fflag);
}
if ((VTOFUD(vp)->flag & FN_SIZECHANGE) != 0) {		if ((VTOFUD(vp)->flag & FN_SIZECHANGE) != 0) {
fuse_vnode_savesize(vp, cred);		fuse_vnode_savesize(vp, cred, td->td_proc->p_pid);
}		}
return 0;		return err;
}		}

		static void
		fdisp_make_mknod_for_fallback(
		struct fuse_dispatcher *fdip,
		struct componentname *cnp,
		struct vnode *dvp,
		uint64_t parentnid,
		struct thread *td,
		struct ucred *cred,
		mode_t mode,
		enum fuse_opcode *op)
		{
		struct fuse_mknod_in *fmni;

		fdisp_init(fdip, sizeof(*fmni) + cnp->cn_namelen + 1);
		*op = FUSE_MKNOD;
		fdisp_make(fdip, *op, vnode_mount(dvp), parentnid, td, cred);
		fmni = fdip->indata;
		fmni->mode = mode;
		fmni->rdev = 0;
		memcpy((char )fdip->indata + sizeof(fmni), cnp->cn_nameptr,
		cnp->cn_namelen);
		((char )fdip->indata)[sizeof(fmni) + cnp->cn_namelen] = '\0';
		}
/*		/*
struct vnop_create_args {		struct vnop_create_args {
struct vnode *a_dvp;		struct vnode *a_dvp;
struct vnode **a_vpp;		struct vnode **a_vpp;
struct componentname *a_cnp;		struct componentname *a_cnp;
struct vattr *a_vap;		struct vattr *a_vap;
};		};
*/		*/
static int		static int
fuse_vnop_create(struct vop_create_args *ap)		fuse_vnop_create(struct vop_create_args *ap)
{		{
struct vnode *dvp = ap->a_dvp;		struct vnode *dvp = ap->a_dvp;
struct vnode **vpp = ap->a_vpp;		struct vnode **vpp = ap->a_vpp;
struct componentname *cnp = ap->a_cnp;		struct componentname *cnp = ap->a_cnp;
struct vattr *vap = ap->a_vap;		struct vattr *vap = ap->a_vap;
struct thread *td = cnp->cn_thread;		struct thread *td = cnp->cn_thread;
struct ucred *cred = cnp->cn_cred;		struct ucred *cred = cnp->cn_cred;

struct fuse_open_in *foi;		struct fuse_data *data;
		struct fuse_create_in *fci;
struct fuse_entry_out *feo;		struct fuse_entry_out *feo;
struct fuse_dispatcher fdi;		struct fuse_open_out *foo;
		struct fuse_dispatcher fdi, fdi2;
struct fuse_dispatcher *fdip = &fdi;		struct fuse_dispatcher *fdip = &fdi;
		struct fuse_dispatcher *fdip2 = NULL;

int err;		int err;

struct mount *mp = vnode_mount(dvp);		struct mount *mp = vnode_mount(dvp);
		data = fuse_get_mpdata(mp);
uint64_t parentnid = VTOFUD(dvp)->nid;		uint64_t parentnid = VTOFUD(dvp)->nid;
mode_t mode = MAKEIMODE(vap->va_type, vap->va_mode);		mode_t mode = MAKEIMODE(vap->va_type, vap->va_mode);
uint64_t x_fh_id;		enum fuse_opcode op;
uint32_t x_open_flags;		int flags;

if (fuse_isdeadfs(dvp)) {		if (fuse_isdeadfs(dvp))
return ENXIO;		return ENXIO;
}
		/* FUSE expects sockets to be created with FUSE_MKNOD */
		if (vap->va_type == VSOCK)
		return fuse_internal_mknod(dvp, vpp, cnp, vap);

		/*
		* VOP_CREATE doesn't tell us the open(2) flags, so we guess. Only a
		* writable mode makes sense, and we might as well include readability
		* too.
		*/
		flags = O_RDWR;

bzero(&fdi, sizeof(fdi));		bzero(&fdi, sizeof(fdi));

/* XXX: Will we ever want devices ? */		if (vap->va_type != VREG)
if ((vap->va_type != VREG)) {
printf("fuse_vnop_create: unsupported va_type %d\n",
vap->va_type);
return (EINVAL);		return (EINVAL);
}

fdisp_init(fdip, sizeof(*foi) + cnp->cn_namelen + 1);		if (!fsess_isimpl(mp, FUSE_CREATE) \|\| vap->va_type == VSOCK) {
if (!fsess_isimpl(mp, FUSE_CREATE)) {		/* Fallback to FUSE_MKNOD/FUSE_OPEN */
SDT_PROBE2(fuse, , vnops, trace, 1,		fdisp_make_mknod_for_fallback(fdip, cnp, dvp, parentnid, td,
"eh, daemon doesn't implement create?");		cred, mode, &op);
return (EINVAL);		} else {
		/* Use FUSE_CREATE */
		size_t insize;

		op = FUSE_CREATE;
		fdisp_init(fdip, sizeof(*fci) + cnp->cn_namelen + 1);
		fdisp_make(fdip, op, vnode_mount(dvp), parentnid, td, cred);
		fci = fdip->indata;
		fci->mode = mode;
		fci->flags = O_CREAT \| flags;
		if (fuse_libabi_geq(data, 7, 12)) {
		insize = sizeof(*fci);
		fci->umask = td->td_proc->p_fd->fd_cmask;
		} else {
		insize = sizeof(struct fuse_open_in);
}		}
fdisp_make(fdip, FUSE_CREATE, vnode_mount(dvp), parentnid, td, cred);

foi = fdip->indata;		memcpy((char *)fdip->indata + insize, cnp->cn_nameptr,
foi->mode = mode;
foi->flags = O_CREAT \| O_RDWR;

memcpy((char )fdip->indata + sizeof(foi), cnp->cn_nameptr,
cnp->cn_namelen);		cnp->cn_namelen);
((char )fdip->indata)[sizeof(foi) + cnp->cn_namelen] = '\0';		((char *)fdip->indata)[insize + cnp->cn_namelen] = '\0';
		}

err = fdisp_wait_answ(fdip);		err = fdisp_wait_answ(fdip);

if (err) {		if (err) {
if (err == ENOSYS)		if (err == ENOSYS && op == FUSE_CREATE) {
fsess_set_notimpl(mp, FUSE_CREATE);		fsess_set_notimpl(mp, FUSE_CREATE);
		fdisp_destroy(fdip);
		fdisp_make_mknod_for_fallback(fdip, cnp, dvp,
		parentnid, td, cred, mode, &op);
		err = fdisp_wait_answ(fdip);
		}
		if (err)
goto out;		goto out;
}		}

feo = fdip->answ;		feo = fdip->answ;

if ((err = fuse_internal_checkentry(feo, VREG))) {		if ((err = fuse_internal_checkentry(feo, vap->va_type))) {
goto out;		goto out;
}		}
err = fuse_vnode_get(mp, feo, feo->nodeid, dvp, vpp, cnp, VREG);
		if (op == FUSE_CREATE) {
		foo = (struct fuse_open_out*)(feo + 1);
		} else {
		/* Issue a separate FUSE_OPEN */
		struct fuse_open_in *foi;

		fdip2 = &fdi2;
		fdisp_init(fdip2, sizeof(*foi));
		fdisp_make(fdip2, FUSE_OPEN, vnode_mount(dvp), feo->nodeid, td,
		cred);
		foi = fdip2->indata;
		foi->flags = flags;
		err = fdisp_wait_answ(fdip2);
		if (err)
		goto out;
		foo = fdip2->answ;
		}
		err = fuse_vnode_get(mp, feo, feo->nodeid, dvp, vpp, cnp, vap->va_type);
if (err) {		if (err) {
struct fuse_release_in *fri;		struct fuse_release_in *fri;
uint64_t nodeid = feo->nodeid;		uint64_t nodeid = feo->nodeid;
uint64_t fh_id = ((struct fuse_open_out *)(feo + 1))->fh;		uint64_t fh_id = foo->fh;

fdisp_init(fdip, sizeof(*fri));		fdisp_init(fdip, sizeof(*fri));
fdisp_make(fdip, FUSE_RELEASE, mp, nodeid, td, cred);		fdisp_make(fdip, FUSE_RELEASE, mp, nodeid, td, cred);
fri = fdip->indata;		fri = fdip->indata;
fri->fh = fh_id;		fri->fh = fh_id;
fri->flags = OFLAGS(mode);		fri->flags = flags;
fuse_insert_callback(fdip->tick, fuse_internal_forget_callback);		fuse_insert_callback(fdip->tick, fuse_internal_forget_callback);
fuse_insert_message(fdip->tick);		fuse_insert_message(fdip->tick, false);
return err;		goto out;
}		}
ASSERT_VOP_ELOCKED(*vpp, "fuse_vnop_create");		ASSERT_VOP_ELOCKED(*vpp, "fuse_vnop_create");
		fuse_internal_cache_attrs(*vpp, &feo->attr, feo->attr_valid,
		feo->attr_valid_nsec, NULL);

fdip->answ = feo + 1;		fuse_filehandle_init(*vpp, FUFH_RDWR, NULL, td, cred, foo);
		fuse_vnode_open(*vpp, foo->open_flags, td);
x_fh_id = ((struct fuse_open_out *)(feo + 1))->fh;		/*
x_open_flags = ((struct fuse_open_out *)(feo + 1))->open_flags;		* Purge the parent's attribute cache because the daemon should've
fuse_filehandle_init(*vpp, FUFH_RDWR, NULL, x_fh_id);		* updated its mtime and ctime
fuse_vnode_open(*vpp, x_open_flags, td);		*/
		fuse_vnode_clear_attr_cache(dvp);
cache_purge_negative(dvp);		cache_purge_negative(dvp);

out:		out:
		if (fdip2)
		fdisp_destroy(fdip2);
fdisp_destroy(fdip);		fdisp_destroy(fdip);
return err;		return err;
}		}

/*		/*
* Our vnop_fsync roughly corresponds to the FUSE_FSYNC method. The Linux		struct vnop_fdatasync_args {
* version of FUSE also has a FUSE_FLUSH method.		struct vop_generic_args a_gen;
*		struct vnode * a_vp;
* On Linux, fsync() synchronizes a file's complete in-core state with that		struct thread * a_td;
* on disk. The call is not supposed to return until the system has completed		};
* that action or until an error is detected.
*
* Linux also has an fdatasync() call that is similar to fsync() but is not
* required to update the metadata such as access time and modification time.
*/		*/
		static int
		fuse_vnop_fdatasync(struct vop_fdatasync_args *ap)
		{
		struct vnode *vp = ap->a_vp;
		struct thread *td = ap->a_td;
		int waitfor = MNT_WAIT;

		int err = 0;

		if (fuse_isdeadfs(vp)) {
		return 0;
		}
		if ((err = vop_stdfdatasync_buf(ap)))
		return err;

		return fuse_internal_fsync(vp, td, waitfor, true);
		}

/*		/*
struct vnop_fsync_args {		struct vnop_fsync_args {
struct vnodeop_desc *a_desc;		struct vop_generic_args a_gen;
struct vnode * a_vp;		struct vnode * a_vp;
struct ucred * a_cred;
int a_waitfor;		int a_waitfor;
struct thread * a_td;		struct thread * a_td;
};		};
*/		*/
static int		static int
fuse_vnop_fsync(struct vop_fsync_args *ap)		fuse_vnop_fsync(struct vop_fsync_args *ap)
{		{
struct vnode *vp = ap->a_vp;		struct vnode *vp = ap->a_vp;
struct thread *td = ap->a_td;		struct thread *td = ap->a_td;
		int waitfor = ap->a_waitfor;
		int err = 0;

struct fuse_filehandle *fufh;
struct fuse_vnode_data *fvdat = VTOFUD(vp);

int type, err = 0;

if (fuse_isdeadfs(vp)) {		if (fuse_isdeadfs(vp)) {
return 0;		return 0;
}		}
if ((err = vop_stdfsync(ap)))		if ((err = vop_stdfsync(ap)))
return err;		return err;

if (!fsess_isimpl(vnode_mount(vp),		return fuse_internal_fsync(vp, td, waitfor, false);
(vnode_vtype(vp) == VDIR ? FUSE_FSYNCDIR : FUSE_FSYNC))) {
goto out;
}		}
for (type = 0; type < FUFH_MAXTYPE; type++) {
fufh = &(fvdat->fufh[type]);
if (FUFH_IS_VALID(fufh)) {
fuse_internal_fsync(vp, td, NULL, fufh);
}
}

out:
return 0;
}

/*		/*
struct vnop_getattr_args {		struct vnop_getattr_args {
struct vnode *a_vp;		struct vnode *a_vp;
struct vattr *a_vap;		struct vattr *a_vap;
struct ucred *a_cred;		struct ucred *a_cred;
struct thread *a_td;		struct thread *a_td;
};		};
*/		*/
static int		static int
fuse_vnop_getattr(struct vop_getattr_args *ap)		fuse_vnop_getattr(struct vop_getattr_args *ap)
{		{
struct vnode *vp = ap->a_vp;		struct vnode *vp = ap->a_vp;
struct vattr *vap = ap->a_vap;		struct vattr *vap = ap->a_vap;
struct ucred *cred = ap->a_cred;		struct ucred *cred = ap->a_cred;
struct thread *td = curthread;		struct thread *td = curthread;
struct fuse_vnode_data *fvdat = VTOFUD(vp);
struct fuse_attr_out *fao;

int err = 0;		int err = 0;
int dataflags;		int dataflags;
struct fuse_dispatcher fdi;

dataflags = fuse_get_mpdata(vnode_mount(vp))->dataflags;		dataflags = fuse_get_mpdata(vnode_mount(vp))->dataflags;

/* Note that we are not bailing out on a dead file system just yet. */		/* Note that we are not bailing out on a dead file system just yet. */

if (!(dataflags & FSESS_INITED)) {		if (!(dataflags & FSESS_INITED)) {
if (!vnode_isvroot(vp)) {		if (!vnode_isvroot(vp)) {
fdata_set_dead(fuse_get_mpdata(vnode_mount(vp)));		fdata_set_dead(fuse_get_mpdata(vnode_mount(vp)));
err = ENOTCONN;		err = ENOTCONN;
return err;		return err;
} else {		} else {
goto fake;		goto fake;
}		}
}		}
fdisp_init(&fdi, 0);		err = fuse_internal_getattr(vp, vap, cred, td);
if ((err = fdisp_simple_putget_vp(&fdi, FUSE_GETATTR, vp, td, cred))) {		if (err == ENOTCONN && vnode_isvroot(vp)) {
if ((err == ENOTCONN) && vnode_isvroot(vp)) {
/* see comment in fuse_vfsop_statfs() */		/* see comment in fuse_vfsop_statfs() */
fdisp_destroy(&fdi);
goto fake;		goto fake;
		} else {
		return err;
}		}
if (err == ENOENT) {
fuse_internal_vnode_disappear(vp);
}
goto out;
}

fao = (struct fuse_attr_out *)fdi.answ;
fuse_internal_cache_attrs(vp, &fao->attr, fao->attr_valid,
fao->attr_valid_nsec, vap);
if (vap->va_type != vnode_vtype(vp)) {
fuse_internal_vnode_disappear(vp);
err = ENOENT;
goto out;
}
if ((fvdat->flag & FN_SIZECHANGE) != 0)
vap->va_size = fvdat->filesize;

if (vnode_isreg(vp) && (fvdat->flag & FN_SIZECHANGE) == 0) {
/*
* This is for those cases when the file size changed without us
* knowing, and we want to catch up.
*/
off_t new_filesize = ((struct fuse_attr_out *)
fdi.answ)->attr.size;

if (fvdat->filesize != new_filesize) {
fuse_vnode_setsize(vp, new_filesize);
fvdat->flag &= ~FN_SIZECHANGE;
}
}

out:
fdisp_destroy(&fdi);
return err;

fake:		fake:
bzero(vap, sizeof(*vap));		bzero(vap, sizeof(*vap));
vap->va_type = vnode_vtype(vp);		vap->va_type = vnode_vtype(vp);

return 0;		return 0;
}		}

/*		/*
struct vnop_inactive_args {		struct vnop_inactive_args {
struct vnode *a_vp;		struct vnode *a_vp;
struct thread *a_td;		struct thread *a_td;
};		};
*/		*/
static int		static int
fuse_vnop_inactive(struct vop_inactive_args *ap)		fuse_vnop_inactive(struct vop_inactive_args *ap)
{		{
struct vnode *vp = ap->a_vp;		struct vnode *vp = ap->a_vp;
struct thread *td = ap->a_td;		struct thread *td = ap->a_td;

struct fuse_vnode_data *fvdat = VTOFUD(vp);		struct fuse_vnode_data *fvdat = VTOFUD(vp);
struct fuse_filehandle *fufh = NULL;		struct fuse_filehandle fufh, fufh_tmp;

int type, need_flush = 1;		int need_flush = 1;

for (type = 0; type < FUFH_MAXTYPE; type++) {		LIST_FOREACH_SAFE(fufh, &fvdat->handles, next, fufh_tmp) {
fufh = &(fvdat->fufh[type]);
if (FUFH_IS_VALID(fufh)) {
if (need_flush && vp->v_type == VREG) {		if (need_flush && vp->v_type == VREG) {
if ((VTOFUD(vp)->flag & FN_SIZECHANGE) != 0) {		if ((VTOFUD(vp)->flag & FN_SIZECHANGE) != 0) {
fuse_vnode_savesize(vp, NULL);		fuse_vnode_savesize(vp, NULL, 0);
}		}
if (fuse_data_cache_invalidate \|\|		if ((fvdat->flag & FN_REVOKED) != 0)
(fvdat->flag & FN_REVOKED) != 0)
fuse_io_invalbuf(vp, td);		fuse_io_invalbuf(vp, td);
else		else
fuse_io_flushbuf(vp, MNT_WAIT, td);		fuse_io_flushbuf(vp, MNT_WAIT, td);
need_flush = 0;		need_flush = 0;
}		}
fuse_filehandle_close(vp, type, td, NULL);		fuse_filehandle_close(vp, fufh, td, NULL);
}		}
}

if ((fvdat->flag & FN_REVOKED) != 0 && fuse_reclaim_revoked) {		if ((fvdat->flag & FN_REVOKED) != 0)
vrecycle(vp);		vrecycle(vp);
}
return 0;		return 0;
}		}

/*		/*
struct vnop_link_args {		struct vnop_link_args {
struct vnode *a_tdvp;		struct vnode *a_tdvp;
struct vnode *a_vp;		struct vnode *a_vp;
struct componentname *a_cnp;		struct componentname *a_cnp;
Show All 35 Lines	fuse_vnop_link(struct vop_link_args *ap)
fuse_internal_newentry_makerequest(vnode_mount(tdvp), VTOI(tdvp), cnp,		fuse_internal_newentry_makerequest(vnode_mount(tdvp), VTOI(tdvp), cnp,
FUSE_LINK, &fli, sizeof(fli), &fdi);		FUSE_LINK, &fli, sizeof(fli), &fdi);
if ((err = fdisp_wait_answ(&fdi))) {		if ((err = fdisp_wait_answ(&fdi))) {
goto out;		goto out;
}		}
feo = fdi.answ;		feo = fdi.answ;

err = fuse_internal_checkentry(feo, vnode_vtype(vp));		err = fuse_internal_checkentry(feo, vnode_vtype(vp));
		if (!err) {
		/*
		* Purge the parent's attribute cache because the daemon
		* should've updated its mtime and ctime
		*/
		fuse_vnode_clear_attr_cache(tdvp);
		fuse_internal_cache_attrs(vp, &feo->attr, feo->attr_valid,
		feo->attr_valid_nsec, NULL);
		}
out:		out:
fdisp_destroy(&fdi);		fdisp_destroy(&fdi);
return err;		return err;
}		}

		struct fuse_lookup_alloc_arg {
		struct fuse_entry_out *feo;
		struct componentname *cnp;
		uint64_t nid;
		enum vtype vtyp;
		};

		/* Callback for vn_get_ino */
		static int
		fuse_lookup_alloc(struct mount mp, void arg, int lkflags, struct vnode **vpp)
		{
		struct fuse_lookup_alloc_arg *flaa = arg;

		return fuse_vnode_get(mp, flaa->feo, flaa->nid, NULL, vpp, flaa->cnp,
		flaa->vtyp);
		}

		SDT_PROBE_DEFINE3(fusefs, , vnops, cache_lookup,
		"int", "struct timespec", "struct timespec");
/*		/*
struct vnop_lookup_args {		struct vnop_lookup_args {
struct vnodeop_desc *a_desc;		struct vnodeop_desc *a_desc;
struct vnode *a_dvp;		struct vnode *a_dvp;
struct vnode **a_vpp;		struct vnode **a_vpp;
struct componentname *a_cnp;		struct componentname *a_cnp;
};		};
*/		*/
Show All 12 Lines	fuse_vnop_lookup(struct vop_lookup_args *ap)
int islastcn = flags & ISLASTCN;		int islastcn = flags & ISLASTCN;
struct mount *mp = vnode_mount(dvp);		struct mount *mp = vnode_mount(dvp);

int err = 0;		int err = 0;
int lookup_err = 0;		int lookup_err = 0;
struct vnode *vp = NULL;		struct vnode *vp = NULL;

struct fuse_dispatcher fdi;		struct fuse_dispatcher fdi;
enum fuse_opcode op;		bool did_lookup = false;
		struct fuse_entry_out *feo = NULL;
		enum vtype vtyp; /* vnode type of target */
		off_t filesize; /* filesize of target */

uint64_t nid;		uint64_t nid;
struct fuse_access_param facp;

if (fuse_isdeadfs(dvp)) {		if (fuse_isdeadfs(dvp)) {
*vpp = NULL;		*vpp = NULL;
return ENXIO;		return ENXIO;
}		}
if (!vnode_isdir(dvp)) {		if (!vnode_isdir(dvp))
return ENOTDIR;		return ENOTDIR;
}
if (islastcn && vfs_isrdonly(mp) && (nameiop != LOOKUP)) {		if (islastcn && vfs_isrdonly(mp) && (nameiop != LOOKUP))
return EROFS;		return EROFS;
}
/*
* We do access check prior to doing anything else only in the case
* when we are at fs root (we'd like to say, "we are at the first
* component", but that's not exactly the same... nevermind).
* See further comments at further access checks.
*/

bzero(&facp, sizeof(facp));		if ((err = fuse_internal_access(dvp, VEXEC, td, cred)))
if (vnode_isvroot(dvp)) { /* early permission check hack */
if ((err = fuse_internal_access(dvp, VEXEC, &facp, td, cred))) {
return err;		return err;
}
}
if (flags & ISDOTDOT) {		if (flags & ISDOTDOT) {
		KASSERT(VTOFUD(dvp)->flag & FN_PARENT_NID,
		("Looking up .. is TODO"));
nid = VTOFUD(dvp)->parent_nid;		nid = VTOFUD(dvp)->parent_nid;
if (nid == 0) {		if (nid == 0)
return ENOENT;		return ENOENT;
}		/* .. is obviously a directory */
fdisp_init(&fdi, 0);		vtyp = VDIR;
op = FUSE_GETATTR;		filesize = 0;
goto calldaemon;
} else if (cnp->cn_namelen == 1 && *(cnp->cn_nameptr) == '.') {		} else if (cnp->cn_namelen == 1 && *(cnp->cn_nameptr) == '.') {
nid = VTOI(dvp);		nid = VTOI(dvp);
fdisp_init(&fdi, 0);		/* . is obviously a directory */
op = FUSE_GETATTR;		vtyp = VDIR;
goto calldaemon;		filesize = 0;
} else if (fuse_lookup_cache_enable) {		} else {
err = cache_lookup(dvp, vpp, cnp, NULL, NULL);		struct timespec now, timeout;
switch (err) {

		err = cache_lookup(dvp, vpp, cnp, &timeout, NULL);
		getnanouptime(&now);
		SDT_PROBE3(fusefs, , vnops, cache_lookup, err, &timeout, &now);
		switch (err) {
case -1: /* positive match */		case -1: /* positive match */
atomic_add_acq_long(&fuse_lookup_cache_hits, 1);		if (timespeccmp(&timeout, &now, >)) {
		counter_u64_add(fuse_lookup_cache_hits, 1);
		} else {
		/* Cache timeout */
		counter_u64_add(fuse_lookup_cache_misses, 1);
		bintime_clear(
		&VTOFUD(*vpp)->entry_cache_timeout);
		cache_purge(*vpp);
		if (dvp != *vpp)
		vput(*vpp);
		else
		vrele(*vpp);
		*vpp = NULL;
		break;
		}
return 0;		return 0;

case 0: /* no match in cache */		case 0: /* no match in cache */
atomic_add_acq_long(&fuse_lookup_cache_misses, 1);		counter_u64_add(fuse_lookup_cache_misses, 1);
break;		break;

case ENOENT: /* negative match */		case ENOENT: /* negative match */
		getnanouptime(&now);
		if (timespeccmp(&timeout, &now, <=)) {
		/* Cache timeout */
		cache_purge_negative(dvp);
		break;
		}
/* fall through */		/* fall through */
default:		default:
return err;		return err;
}		}
}
nid = VTOI(dvp);		nid = VTOI(dvp);
fdisp_init(&fdi, cnp->cn_namelen + 1);		fdisp_init(&fdi, cnp->cn_namelen + 1);
op = FUSE_LOOKUP;		fdisp_make(&fdi, FUSE_LOOKUP, mp, nid, td, cred);

calldaemon:
fdisp_make(&fdi, op, mp, nid, td, cred);

if (op == FUSE_LOOKUP) {
memcpy(fdi.indata, cnp->cn_nameptr, cnp->cn_namelen);		memcpy(fdi.indata, cnp->cn_nameptr, cnp->cn_namelen);
((char *)fdi.indata)[cnp->cn_namelen] = '\0';		((char *)fdi.indata)[cnp->cn_namelen] = '\0';
}
lookup_err = fdisp_wait_answ(&fdi);		lookup_err = fdisp_wait_answ(&fdi);
		did_lookup = true;

if ((op == FUSE_LOOKUP) && !lookup_err) { /* lookup call succeeded */		if (!lookup_err) {
nid = ((struct fuse_entry_out *)fdi.answ)->nodeid;		/* lookup call succeeded */
if (!nid) {		feo = (struct fuse_entry_out *)fdi.answ;
/*		nid = feo->nodeid;
* zero nodeid is the same as "not found",		if (nid == 0) {
* but it's also cacheable (which we keep		/* zero nodeid means ENOENT and cache it */
* keep on doing not as of writing this)		struct timespec timeout;
*/
		fdi.answ_stat = ENOENT;
lookup_err = ENOENT;		lookup_err = ENOENT;
		if (cnp->cn_flags & MAKEENTRY) {
		fuse_validity_2_timespec(feo, &timeout);
		cache_enter_time(dvp, *vpp, cnp,
		&timeout, NULL);
		}
} else if (nid == FUSE_ROOT_ID) {		} else if (nid == FUSE_ROOT_ID) {
lookup_err = EINVAL;		lookup_err = EINVAL;
}		}
		vtyp = IFTOVT(feo->attr.mode);
		filesize = feo->attr.size;
}		}
if (lookup_err &&		if (lookup_err && (!fdi.answ_stat \|\| lookup_err != ENOENT)) {
(!fdi.answ_stat \|\| lookup_err != ENOENT \|\| op != FUSE_LOOKUP)) {
fdisp_destroy(&fdi);		fdisp_destroy(&fdi);
return lookup_err;		return lookup_err;
}		}
		}
/* lookup_err, if non-zero, must be ENOENT at this point */		/* lookup_err, if non-zero, must be ENOENT at this point */

if (lookup_err) {		if (lookup_err) {
		/* Entry not found */
if ((nameiop == CREATE \|\| nameiop == RENAME) && islastcn		if ((nameiop == CREATE \|\| nameiop == RENAME) && islastcn) {
/* && directory dvp has not been removed */ ) {		err = fuse_internal_access(dvp, VWRITE, td, cred);
		if (!err) {
if (vfs_isrdonly(mp)) {
err = EROFS;
goto out;
}
#if 0 /* THINK_ABOUT_THIS */
if ((err = fuse_internal_access(dvp, VWRITE, cred, td, &facp))) {
goto out;
}
#endif

/*		/*
* Possibly record the position of a slot in the		* Set the SAVENAME flag to hold onto the
* directory large enough for the new component name.		* pathname for use later in VOP_CREATE or
* This can be recorded in the vnode private data for		* VOP_RENAME.
* dvp. Set the SAVENAME flag to hold onto the
* pathname for use later in VOP_CREATE or VOP_RENAME.
*/		*/
cnp->cn_flags \|= SAVENAME;		cnp->cn_flags \|= SAVENAME;

err = EJUSTRETURN;		err = EJUSTRETURN;
goto out;
}		}
/* Consider inserting name into cache. */

/*
* No we can't use negative caching, as the fs
* changes are out of our control.
* False positives' falseness turns out just as things
* go by, but false negatives' falseness doesn't.
* (and aiding the caching mechanism with extra control
* mechanisms comes quite close to beating the whole purpose
* caching...)
*/
#if 0
if ((cnp->cn_flags & MAKEENTRY) != 0) {
SDT_PROBE2(fuse, , vnops, trace, 1,
"inserting NULL into cache");
cache_enter(dvp, NULL, cnp);
}
#endif
err = ENOENT;
goto out;

} else {		} else {
		err = ENOENT;
/* !lookup_err */

struct fuse_entry_out *feo = NULL;
struct fuse_attr *fattr = NULL;

if (op == FUSE_GETATTR) {
fattr = &((struct fuse_attr_out *)fdi.answ)->attr;
} else {
feo = (struct fuse_entry_out *)fdi.answ;
fattr = &(feo->attr);
}		}

/*
* If deleting, and at end of pathname, return parameters
* which can be used to remove file. If the wantparent flag
* isn't set, we return only the directory, otherwise we go on
* and lock the inode, being careful with ".".
*/
if (nameiop == DELETE && islastcn) {
/*
* Check for write access on directory.
*/
facp.xuid = fattr->uid;
facp.facc_flags \|= FACCESS_STICKY;
err = fuse_internal_access(dvp, VWRITE, &facp, td, cred);
facp.facc_flags &= ~FACCESS_XQUERIES;

if (err) {
goto out;
}
if (nid == VTOI(dvp)) {
vref(dvp);
*vpp = dvp;
} else {		} else {
err = fuse_vnode_get(dvp->v_mount, feo, nid,		/* Entry was found */
dvp, &vp, cnp, IFTOVT(fattr->mode));
if (err)
goto out;
*vpp = vp;
}

/*
* Save the name for use in VOP_RMDIR and VOP_REMOVE
* later.
*/
cnp->cn_flags \|= SAVENAME;
goto out;

}
/*
* If rewriting (RENAME), return the inode and the
* information required to rewrite the present directory
* Must get inode of directory entry to verify it's a
* regular file, or empty directory.
*/
if (nameiop == RENAME && wantparent && islastcn) {

#if 0 /* THINK_ABOUT_THIS */
if ((err = fuse_internal_access(dvp, VWRITE, cred, td, &facp))) {
goto out;
}
#endif

/*
* Check for "."
*/
if (nid == VTOI(dvp)) {
err = EISDIR;
goto out;
}
err = fuse_vnode_get(vnode_mount(dvp), feo, nid, dvp,
&vp, cnp, IFTOVT(fattr->mode));
if (err) {
goto out;
}
*vpp = vp;
/*
* Save the name for use in VOP_RENAME later.
*/
cnp->cn_flags \|= SAVENAME;

goto out;
}
if (flags & ISDOTDOT) {		if (flags & ISDOTDOT) {
struct mount *mp;		struct fuse_lookup_alloc_arg flaa;
int ltype;

/*		flaa.nid = nid;
* Expanded copy of vn_vget_ino() so that		flaa.feo = feo;
* fuse_vnode_get() can be used.		flaa.cnp = cnp;
*/		flaa.vtyp = vtyp;
mp = dvp->v_mount;		err = vn_vget_ino_gen(dvp, fuse_lookup_alloc, &flaa, 0,
ltype = VOP_ISLOCKED(dvp);		&vp);
err = vfs_busy(mp, MBF_NOWAIT);
if (err != 0) {
vfs_ref(mp);
VOP_UNLOCK(dvp, 0);
err = vfs_busy(mp, 0);
vn_lock(dvp, ltype \| LK_RETRY);
vfs_rel(mp);
if (err)
goto out;
if ((dvp->v_iflag & VI_DOOMED) != 0) {
err = ENOENT;
vfs_unbusy(mp);
goto out;
}
}
VOP_UNLOCK(dvp, 0);
err = fuse_vnode_get(vnode_mount(dvp), feo, nid, NULL,
&vp, cnp, IFTOVT(fattr->mode));
vfs_unbusy(mp);
vn_lock(dvp, ltype \| LK_RETRY);
if ((dvp->v_iflag & VI_DOOMED) != 0) {
if (err == 0)
vput(vp);
err = ENOENT;
}
if (err)
goto out;
*vpp = vp;		*vpp = vp;
} else if (nid == VTOI(dvp)) {		} else if (nid == VTOI(dvp)) {
vref(dvp);		vref(dvp);
*vpp = dvp;		*vpp = dvp;
} else {		} else {
struct fuse_vnode_data *fvdat;		struct fuse_vnode_data *fvdat;

err = fuse_vnode_get(vnode_mount(dvp), feo, nid, dvp,		err = fuse_vnode_get(vnode_mount(dvp), feo, nid, dvp,
&vp, cnp, IFTOVT(fattr->mode));		&vp, cnp, vtyp);
if (err) {		if (err)
goto out;		goto out;
}		*vpp = vp;
fuse_vnode_setparent(vp, dvp);

/*		/*
* In the case where we are looking up a FUSE node		* In the case where we are looking up a FUSE node
* represented by an existing cached vnode, and the		* represented by an existing cached vnode, and the
* true size reported by FUSE_LOOKUP doesn't match		* true size reported by FUSE_LOOKUP doesn't match
* the vnode's cached size, fix the vnode cache to		* the vnode's cached size, then any cached writes
* match the real object size.		* beyond the file's current size are lost.
*		*
* This can occur via FUSE distributed filesystems,		* We can get here:
* irregular files, etc.		* * following attribute cache expiration, or
		* * due a bug in the daemon, or
*/		*/
fvdat = VTOFUD(vp);		fvdat = VTOFUD(vp);
if (vnode_isreg(vp) &&		if (vnode_isreg(vp) &&
fattr->size != fvdat->filesize) {		filesize != fvdat->cached_attrs.va_size &&
		fvdat->flag & FN_SIZECHANGE) {
/*		/*
* The FN_SIZECHANGE flag reflects a dirty		* The FN_SIZECHANGE flag reflects a dirty
* append. If userspace lets us know our cache		* append. If userspace lets us know our cache
* is invalid, that write was lost. (Dirty		* is invalid, that write was lost. (Dirty
* writes that do not cause append are also		* writes that do not cause append are also
* lost, but we don't detect them here.)		* lost, but we don't detect them here.)
*		*
* XXX: Maybe disable WB caching on this mount.		* XXX: Maybe disable WB caching on this mount.
*/		*/
if (fvdat->flag & FN_SIZECHANGE)		printf("%s: WB cache incoherent on %s!\n",
printf("%s: WB cache incoherent on "		__func__,
"%s!\n", __func__,
vnode_mount(vp)->mnt_stat.f_mntonname);		vnode_mount(vp)->mnt_stat.f_mntonname);

(void)fuse_vnode_setsize(vp, fattr->size);
fvdat->flag &= ~FN_SIZECHANGE;		fvdat->flag &= ~FN_SIZECHANGE;
}		}
*vpp = vp;
}

if (op == FUSE_GETATTR) {		MPASS(feo != NULL);
struct fuse_attr_out *fao =		fuse_internal_cache_attrs(*vpp, &feo->attr,
(struct fuse_attr_out*)fdi.answ;		feo->attr_valid, feo->attr_valid_nsec, NULL);
fuse_internal_cache_attrs(*vpp,		fuse_validity_2_bintime(feo->entry_valid,
&fao->attr, fao->attr_valid,		feo->entry_valid_nsec,
fao->attr_valid_nsec, NULL);		&fvdat->entry_cache_timeout);
} else {
struct fuse_entry_out *feo =
(struct fuse_entry_out*)fdi.answ;
fuse_internal_cache_attrs(*vpp,
&feo->attr, feo->attr_valid,
feo->attr_valid_nsec, NULL);
}

/* Insert name into cache if appropriate. */		if ((nameiop == DELETE \|\| nameiop == RENAME) &&
		islastcn)
		{
		struct vattr dvattr;

		err = fuse_internal_access(dvp, VWRITE, td,
		cred);
		if (err != 0)
		goto out;
/*		/*
* Nooo, caching is evil. With caching, we can't avoid stale		* if the parent's sticky bit is set, check
* information taking over the playground (cached info is not		* whether we're allowed to remove the file.
* just positive/negative, it does have qualitative aspects,		* Need to figure out the vnode locking to make
* too). And a (VOP/FUSE)_GETATTR is always thrown anyway, when		* this work.
* walking down along cached path components, and that's not
* any cheaper than FUSE_LOOKUP. This might change with
* implementing kernel side attr caching, but... In Linux,
* lookup results are not cached, and the daemon is bombarded
* with FUSE_LOOKUPS on and on. This shows that by design, the
* daemon is expected to handle frequent lookup queries
* efficiently, do its caching in userspace, and so on.
*
* So just leave the name cache alone.
*/		*/
		fuse_internal_getattr(dvp, &dvattr, cred, td);
/*		if ((dvattr.va_mode & S_ISTXT) &&
* Well, now I know, Linux caches lookups, but with a		fuse_internal_access(dvp, VADMIN, td,
* timeout... So it's the same thing as attribute caching:		cred) &&
* we can deal with it when implement timeouts.		fuse_internal_access(*vpp, VADMIN, td,
*/		cred)) {
#if 0		err = EPERM;
if (cnp->cn_flags & MAKEENTRY) {		goto out;
cache_enter(dvp, *vpp, cnp);
}		}
#endif
}		}
out:
if (!lookup_err) {

/* No lookup error; need to clean up. */		if (islastcn && (
		(nameiop == DELETE) \|\|
if (err) { /* Found inode; exit with no vnode. */		(nameiop == RENAME && wantparent))) {
if (op == FUSE_LOOKUP) {		cnp->cn_flags \|= SAVENAME;
fuse_internal_forget_send(vnode_mount(dvp), td, cred,
nid, 1);
}		}
fdisp_destroy(&fdi);
return err;
} else {
#ifndef NO_EARLY_PERM_CHECK_HACK
if (!islastcn) {
/*
* We have the attributes of the next item
* now, and it's a fact, and we do not
* have to do extra work for it (ie, beg the
* daemon), and it neither depends on such
* accidental things like attr caching. So
* the big idea: check credentials now,
* not at the beginning of the next call to
* lookup.
*
* The first item of the lookup chain (fs root)
* won't be checked then here, of course, as
* its never "the next". But go and see that
* the root is taken care about at the very
* beginning of this function.
*
* Now, given we want to do the access check
* this way, one might ask: so then why not
* do the access check just after fetching
* the inode and its attributes from the
* daemon? Why bother with producing the
* corresponding vnode at all if something
* is not OK? We know what's the deal as
* soon as we get those attrs... There is
* one bit of info though not given us by
* the daemon: whether his response is
* authoritative or not... His response should
* be ignored if something is mounted over
* the dir in question. But that can be
* known only by having the vnode...
*/
int tmpvtype = vnode_vtype(*vpp);

bzero(&facp, sizeof(facp));
/the early perm check hack /
facp.facc_flags \|= FACCESS_VA_VALID;

if ((tmpvtype != VDIR) && (tmpvtype != VLNK)) {
err = ENOTDIR;
}		}
if (!err && !vnode_mountedhere(*vpp)) {
err = fuse_internal_access(*vpp, VEXEC, &facp, td, cred);
}		}
		out:
if (err) {		if (err) {
if (tmpvtype == VLNK)		if (vp != NULL && dvp != vp)
SDT_PROBE2(fuse, , vnops, trace,		vput(vp);
1, "weird, permission "		else if (vp != NULL)
"error with a symlink?");		vrele(vp);
vput(*vpp);
*vpp = NULL;		*vpp = NULL;
}		}
}		if (did_lookup)
#endif
}
}
fdisp_destroy(&fdi);		fdisp_destroy(&fdi);

return err;		return err;
}		}

/*		/*
struct vnop_mkdir_args {		struct vnop_mkdir_args {
struct vnode *a_dvp;		struct vnode *a_dvp;
struct vnode **a_vpp;		struct vnode **a_vpp;
Show All 10 Lines	fuse_vnop_mkdir(struct vop_mkdir_args *ap)
struct vattr *vap = ap->a_vap;		struct vattr *vap = ap->a_vap;

struct fuse_mkdir_in fmdi;		struct fuse_mkdir_in fmdi;

if (fuse_isdeadfs(dvp)) {		if (fuse_isdeadfs(dvp)) {
return ENXIO;		return ENXIO;
}		}
fmdi.mode = MAKEIMODE(vap->va_type, vap->va_mode);		fmdi.mode = MAKEIMODE(vap->va_type, vap->va_mode);
		fmdi.umask = curthread->td_proc->p_fd->fd_cmask;

return (fuse_internal_newentry(dvp, vpp, cnp, FUSE_MKDIR, &fmdi,		return (fuse_internal_newentry(dvp, vpp, cnp, FUSE_MKDIR, &fmdi,
sizeof(fmdi), VDIR));		sizeof(fmdi), VDIR));
}		}

/*		/*
struct vnop_mknod_args {		struct vnop_mknod_args {
struct vnode *a_dvp;		struct vnode *a_dvp;
struct vnode **a_vpp;		struct vnode **a_vpp;
struct componentname *a_cnp;		struct componentname *a_cnp;
struct vattr *a_vap;		struct vattr *a_vap;
};		};
*/		*/
static int		static int
fuse_vnop_mknod(struct vop_mknod_args *ap)		fuse_vnop_mknod(struct vop_mknod_args *ap)
{		{

return (EINVAL);		struct vnode *dvp = ap->a_dvp;
}		struct vnode **vpp = ap->a_vpp;
		struct componentname *cnp = ap->a_cnp;
		struct vattr *vap = ap->a_vap;

		if (fuse_isdeadfs(dvp))
		return ENXIO;

		return fuse_internal_mknod(dvp, vpp, cnp, vap);
		}

/*		/*
struct vnop_open_args {		struct vop_open_args {
struct vnode *a_vp;		struct vnode *a_vp;
int a_mode;		int a_mode;
struct ucred *a_cred;		struct ucred *a_cred;
struct thread *a_td;		struct thread *a_td;
int a_fdidx; / struct file *a_fp;		int a_fdidx; / struct file *a_fp;
};		};
*/		*/
static int		static int
fuse_vnop_open(struct vop_open_args *ap)		fuse_vnop_open(struct vop_open_args *ap)
{		{
struct vnode *vp = ap->a_vp;		struct vnode *vp = ap->a_vp;
int mode = ap->a_mode;		int a_mode = ap->a_mode;
struct thread *td = ap->a_td;		struct thread *td = ap->a_td;
struct ucred *cred = ap->a_cred;		struct ucred *cred = ap->a_cred;
		pid_t pid = td->td_proc->p_pid;
fufh_type_t fufh_type;
struct fuse_vnode_data *fvdat;		struct fuse_vnode_data *fvdat;

int error, isdir = 0;		if (fuse_isdeadfs(vp))
int32_t fuse_open_flags;

if (fuse_isdeadfs(vp)) {
return ENXIO;		return ENXIO;
}		if (vp->v_type == VCHR \|\| vp->v_type == VBLK \|\| vp->v_type == VFIFO)
if ((mode & (FREAD \| FWRITE)) == 0)		return (EOPNOTSUPP);
		if ((a_mode & (FREAD \| FWRITE \| FEXEC)) == 0)
return EINVAL;		return EINVAL;

fvdat = VTOFUD(vp);		fvdat = VTOFUD(vp);

if (vnode_isdir(vp)) {		if (fuse_filehandle_validrw(vp, a_mode, cred, pid)) {
isdir = 1;		fuse_vnode_open(vp, 0, td);
}
fuse_open_flags = 0;
if (isdir) {
fufh_type = FUFH_RDONLY;
} else {
fufh_type = fuse_filehandle_xlate_from_fflags(mode);
/*
* For WRONLY opens, force DIRECT_IO. This is necessary
* since writing a partial block through the buffer cache
* will result in a read of the block and that read won't
* be allowed by the WRONLY open.
*/
if (fufh_type == FUFH_WRONLY \|\|
(fvdat->flag & FN_DIRECTIO) != 0)
fuse_open_flags = FOPEN_DIRECT_IO;
}

if (fuse_filehandle_validrw(vp, fufh_type) != FUFH_INVALID) {
fuse_vnode_open(vp, fuse_open_flags, td);
return 0;		return 0;
}		}
error = fuse_filehandle_open(vp, fufh_type, NULL, td, cred);

return error;		return fuse_filehandle_open(vp, a_mode, NULL, td, cred);
}		}

static int		static int
fuse_vnop_pathconf(struct vop_pathconf_args *ap)		fuse_vnop_pathconf(struct vop_pathconf_args *ap)
{		{

switch (ap->a_name) {		switch (ap->a_name) {
case _PC_FILESIZEBITS:		case _PC_FILESIZEBITS:
Show All 26 Lines
*/		*/
static int		static int
fuse_vnop_read(struct vop_read_args *ap)		fuse_vnop_read(struct vop_read_args *ap)
{		{
struct vnode *vp = ap->a_vp;		struct vnode *vp = ap->a_vp;
struct uio *uio = ap->a_uio;		struct uio *uio = ap->a_uio;
int ioflag = ap->a_ioflag;		int ioflag = ap->a_ioflag;
struct ucred *cred = ap->a_cred;		struct ucred *cred = ap->a_cred;
		pid_t pid = curthread->td_proc->p_pid;

if (fuse_isdeadfs(vp)) {		if (fuse_isdeadfs(vp)) {
return ENXIO;		return ENXIO;
}		}

if (VTOFUD(vp)->flag & FN_DIRECTIO) {		if (VTOFUD(vp)->flag & FN_DIRECTIO) {
ioflag \|= IO_DIRECT;		ioflag \|= IO_DIRECT;
}		}

return fuse_io_dispatch(vp, uio, ioflag, cred);		return fuse_io_dispatch(vp, uio, ioflag, cred, pid);
}		}

/*		/*
struct vnop_readdir_args {		struct vnop_readdir_args {
struct vnode *a_vp;		struct vnode *a_vp;
struct uio *a_uio;		struct uio *a_uio;
struct ucred *a_cred;		struct ucred *a_cred;
int *a_eofflag;		int *a_eofflag;
int *ncookies;		int *a_ncookies;
u_long **a_cookies;		u_long **a_cookies;
};		};
*/		*/
static int		static int
fuse_vnop_readdir(struct vop_readdir_args *ap)		fuse_vnop_readdir(struct vop_readdir_args *ap)
{		{
struct vnode *vp = ap->a_vp;		struct vnode *vp = ap->a_vp;
struct uio *uio = ap->a_uio;		struct uio *uio = ap->a_uio;
struct ucred *cred = ap->a_cred;		struct ucred *cred = ap->a_cred;

struct fuse_filehandle *fufh = NULL;		struct fuse_filehandle *fufh = NULL;
struct fuse_iov cookediov;		struct fuse_iov cookediov;

int err = 0;		int err = 0;
int freefufh = 0;		u_long *cookies;
		off_t startoff;
		ssize_t tresid;
		int ncookies;
		bool closefufh = false;
		pid_t pid = curthread->td_proc->p_pid;

		if (ap->a_eofflag)
		*ap->a_eofflag = 0;
if (fuse_isdeadfs(vp)) {		if (fuse_isdeadfs(vp)) {
return ENXIO;		return ENXIO;
}		}
if ( /* XXXIP ((uio_iovcnt(uio) > 1)) \|\| */		if ( /* XXXIP ((uio_iovcnt(uio) > 1)) \|\| */
(uio_resid(uio) < sizeof(struct dirent))) {		(uio_resid(uio) < sizeof(struct dirent))) {
return EINVAL;		return EINVAL;
}		}

if (!fuse_filehandle_valid(vp, FUFH_RDONLY)) {		tresid = uio->uio_resid;
SDT_PROBE2(fuse, , vnops, trace, 1,		startoff = uio->uio_offset;
"calling readdir() before open()");		err = fuse_filehandle_get_dir(vp, &fufh, cred, pid);
err = fuse_filehandle_open(vp, FUFH_RDONLY, &fufh, NULL, cred);		if (err == EBADF && vnode_mount(vp)->mnt_flag & MNT_EXPORTED) {
freefufh = 1;		/*
} else {		* nfsd will do VOP_READDIR without first doing VOP_OPEN. We
err = fuse_filehandle_get(vp, FUFH_RDONLY, &fufh);		* must implicitly open the directory here
		*/
		err = fuse_filehandle_open(vp, FREAD, &fufh, curthread, cred);
		if (err == 0) {
		/*
		* When a directory is opened, it must be read from
		* the beginning. Hopefully, the "startoff" still
		* exists as an offset cookie for the directory.
		* If not, it will read the entire directory without
		* returning any entries and just return eof.
		*/
		uio->uio_offset = 0;
}		}
if (err) {		closefufh = true;
		}
		if (err)
return (err);		return (err);
		if (ap->a_ncookies != NULL) {
		ncookies = uio->uio_resid /
		(offsetof(struct dirent, d_name) + 4) + 1;
		cookies = malloc(ncookies * sizeof(*cookies), M_TEMP, M_WAITOK);
		*ap->a_ncookies = ncookies;
		*ap->a_cookies = cookies;
		} else {
		ncookies = 0;
		cookies = NULL;
}		}
#define DIRCOOKEDSIZE FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET + MAXNAMLEN + 1)		#define DIRCOOKEDSIZE FUSE_DIRENT_ALIGN(FUSE_NAME_OFFSET + MAXNAMLEN + 1)
fiov_init(&cookediov, DIRCOOKEDSIZE);		fiov_init(&cookediov, DIRCOOKEDSIZE);

err = fuse_internal_readdir(vp, uio, fufh, &cookediov);		err = fuse_internal_readdir(vp, uio, startoff, fufh, &cookediov,
		&ncookies, cookies);

fiov_teardown(&cookediov);		fiov_teardown(&cookediov);
if (freefufh) {		if (closefufh)
fuse_filehandle_close(vp, FUFH_RDONLY, NULL, cred);		fuse_filehandle_close(vp, fufh, curthread, cred);

		if (ap->a_ncookies != NULL) {
		if (err == 0) {
		*ap->a_ncookies -= ncookies;
		} else {
		free(*ap->a_cookies, M_TEMP);
		*ap->a_ncookies = 0;
		*ap->a_cookies = NULL;
}		}
		}
		if (err == 0 && tresid == uio->uio_resid)
		*ap->a_eofflag = 1;

return err;		return err;
}		}

/*		/*
struct vnop_readlink_args {		struct vnop_readlink_args {
struct vnode *a_vp;		struct vnode *a_vp;
struct uio *a_uio;		struct uio *a_uio;
struct ucred *a_cred;		struct ucred *a_cred;
Show All 40 Lines	/*
struct thread *a_td;		struct thread *a_td;
};		};
*/		*/
static int		static int
fuse_vnop_reclaim(struct vop_reclaim_args *ap)		fuse_vnop_reclaim(struct vop_reclaim_args *ap)
{		{
struct vnode *vp = ap->a_vp;		struct vnode *vp = ap->a_vp;
struct thread *td = ap->a_td;		struct thread *td = ap->a_td;

struct fuse_vnode_data *fvdat = VTOFUD(vp);		struct fuse_vnode_data *fvdat = VTOFUD(vp);
struct fuse_filehandle *fufh = NULL;		struct fuse_filehandle fufh, fufh_tmp;

int type;

if (!fvdat) {		if (!fvdat) {
panic("FUSE: no vnode data during recycling");		panic("FUSE: no vnode data during recycling");
}		}
for (type = 0; type < FUFH_MAXTYPE; type++) {		LIST_FOREACH_SAFE(fufh, &fvdat->handles, next, fufh_tmp) {
fufh = &(fvdat->fufh[type]);		printf("FUSE: vnode being reclaimed with open fufh "
if (FUFH_IS_VALID(fufh)) {		"(type=%#x)", fufh->fufh_type);
printf("FUSE: vnode being reclaimed but fufh (type=%d) is valid",		fuse_filehandle_close(vp, fufh, td, NULL);
type);
fuse_filehandle_close(vp, type, td, NULL);
}		}
}

if ((!fuse_isdeadfs(vp)) && (fvdat->nlookup)) {		if ((!fuse_isdeadfs(vp)) && (fvdat->nlookup)) {
fuse_internal_forget_send(vnode_mount(vp), td, NULL, VTOI(vp),		fuse_internal_forget_send(vnode_mount(vp), td, NULL, VTOI(vp),
fvdat->nlookup);		fvdat->nlookup);
}		}
fuse_vnode_setparent(vp, NULL);		fuse_vnode_setparent(vp, NULL);
cache_purge(vp);		cache_purge(vp);
vfs_hash_remove(vp);		vfs_hash_remove(vp);
Show All 20 Lines	fuse_vnop_remove(struct vop_remove_args *ap)
int err;		int err;

if (fuse_isdeadfs(vp)) {		if (fuse_isdeadfs(vp)) {
return ENXIO;		return ENXIO;
}		}
if (vnode_isdir(vp)) {		if (vnode_isdir(vp)) {
return EPERM;		return EPERM;
}		}
cache_purge(vp);

err = fuse_internal_remove(dvp, vp, cnp, FUSE_UNLINK);		err = fuse_internal_remove(dvp, vp, cnp, FUSE_UNLINK);

if (err == 0)
fuse_internal_vnode_disappear(vp);
return err;		return err;
}		}

/*		/*
struct vnop_rename_args {		struct vnop_rename_args {
struct vnode *a_fdvp;		struct vnode *a_fdvp;
struct vnode *a_fvp;		struct vnode *a_fvp;
struct componentname *a_fcnp;		struct componentname *a_fcnp;
struct vnode *a_tdvp;		struct vnode *a_tdvp;
struct vnode *a_tvp;		struct vnode *a_tvp;
struct componentname *a_tcnp;		struct componentname *a_tcnp;
};		};
*/		*/
static int		static int
fuse_vnop_rename(struct vop_rename_args *ap)		fuse_vnop_rename(struct vop_rename_args *ap)
{		{
struct vnode *fdvp = ap->a_fdvp;		struct vnode *fdvp = ap->a_fdvp;
struct vnode *fvp = ap->a_fvp;		struct vnode *fvp = ap->a_fvp;
struct componentname *fcnp = ap->a_fcnp;		struct componentname *fcnp = ap->a_fcnp;
struct vnode *tdvp = ap->a_tdvp;		struct vnode *tdvp = ap->a_tdvp;
struct vnode *tvp = ap->a_tvp;		struct vnode *tvp = ap->a_tvp;
struct componentname *tcnp = ap->a_tcnp;		struct componentname *tcnp = ap->a_tcnp;
struct fuse_data *data;		struct fuse_data *data;
		bool newparent = fdvp != tdvp;
		bool isdir = fvp->v_type == VDIR;
int err = 0;		int err = 0;

if (fuse_isdeadfs(fdvp)) {		if (fuse_isdeadfs(fdvp)) {
return ENXIO;		return ENXIO;
}		}
if (fvp->v_mount != tdvp->v_mount \|\|		if (fvp->v_mount != tdvp->v_mount \|\|
(tvp && fvp->v_mount != tvp->v_mount)) {		(tvp && fvp->v_mount != tvp->v_mount)) {
SDT_PROBE2(fuse, , vnops, trace, 1, "cross-device rename");		SDT_PROBE2(fusefs, , vnops, trace, 1, "cross-device rename");
err = EXDEV;		err = EXDEV;
goto out;		goto out;
}		}
cache_purge(fvp);		cache_purge(fvp);

/*		/*
* FUSE library is expected to check if target directory is not		* FUSE library is expected to check if target directory is not
* under the source directory in the file system tree.		* under the source directory in the file system tree.
* Linux performs this check at VFS level.		* Linux performs this check at VFS level.
*/		*/
		/*
		* If source is a directory, and it will get a new parent, user must
		* have write permission to it, so ".." can be modified.
		*/
data = fuse_get_mpdata(vnode_mount(tdvp));		data = fuse_get_mpdata(vnode_mount(tdvp));
		if (data->dataflags & FSESS_DEFAULT_PERMISSIONS && isdir && newparent) {
		err = fuse_internal_access(fvp, VWRITE,
		tcnp->cn_thread, tcnp->cn_cred);
		if (err)
		goto out;
		}
sx_xlock(&data->rename_lock);		sx_xlock(&data->rename_lock);
err = fuse_internal_rename(fdvp, fcnp, tdvp, tcnp);		err = fuse_internal_rename(fdvp, fcnp, tdvp, tcnp);
if (err == 0) {		if (err == 0) {
if (tdvp != fdvp)		if (tdvp != fdvp)
fuse_vnode_setparent(fvp, tdvp);		fuse_vnode_setparent(fvp, tdvp);
if (tvp != NULL)		if (tvp != NULL)
fuse_vnode_setparent(tvp, NULL);		fuse_vnode_setparent(tvp, NULL);
}		}
▲ Show 20 Lines • Show All 41 Lines • ▼ Show 20 Lines	fuse_vnop_rmdir(struct vop_rmdir_args *ap)
if (fuse_isdeadfs(vp)) {		if (fuse_isdeadfs(vp)) {
return ENXIO;		return ENXIO;
}		}
if (VTOFUD(vp) == VTOFUD(dvp)) {		if (VTOFUD(vp) == VTOFUD(dvp)) {
return EINVAL;		return EINVAL;
}		}
err = fuse_internal_remove(dvp, vp, ap->a_cnp, FUSE_RMDIR);		err = fuse_internal_remove(dvp, vp, ap->a_cnp, FUSE_RMDIR);

if (err == 0)
fuse_internal_vnode_disappear(vp);
return err;		return err;
}		}

/*		/*
struct vnop_setattr_args {		struct vnop_setattr_args {
struct vnode *a_vp;		struct vnode *a_vp;
struct vattr *a_vap;		struct vattr *a_vap;
struct ucred *a_cred;		struct ucred *a_cred;
struct thread *a_td;		struct thread *a_td;
};		};
*/		*/
static int		static int
fuse_vnop_setattr(struct vop_setattr_args *ap)		fuse_vnop_setattr(struct vop_setattr_args *ap)
{		{
struct vnode *vp = ap->a_vp;		struct vnode *vp = ap->a_vp;
struct vattr *vap = ap->a_vap;		struct vattr *vap = ap->a_vap;
struct ucred *cred = ap->a_cred;		struct ucred *cred = ap->a_cred;
struct thread *td = curthread;		struct thread *td = curthread;
		struct mount *mp;
		struct fuse_data *data;
		struct vattr old_va;
		int dataflags;
		int err = 0, err2;
		accmode_t accmode = 0;
		bool checkperm;
		bool drop_suid = false;
		gid_t cr_gid;

struct fuse_dispatcher fdi;		mp = vnode_mount(vp);
struct fuse_setattr_in *fsai;		data = fuse_get_mpdata(mp);
struct fuse_access_param facp;		dataflags = data->dataflags;
		checkperm = dataflags & FSESS_DEFAULT_PERMISSIONS;
		if (cred->cr_ngroups > 0)
		cr_gid = cred->cr_groups[0];
		else
		cr_gid = 0;

int err = 0;
enum vtype vtyp;
int sizechanged = 0;
uint64_t newsize = 0;

if (fuse_isdeadfs(vp)) {		if (fuse_isdeadfs(vp)) {
return ENXIO;		return ENXIO;
}		}
fdisp_init(&fdi, sizeof(*fsai));
fdisp_make_vp(&fdi, FUSE_SETATTR, vp, td, cred);
fsai = fdi.indata;
fsai->valid = 0;

bzero(&facp, sizeof(facp));

facp.xuid = vap->va_uid;
facp.xgid = vap->va_gid;

if (vap->va_uid != (uid_t)VNOVAL) {		if (vap->va_uid != (uid_t)VNOVAL) {
facp.facc_flags \|= FACCESS_CHOWN;		if (checkperm) {
fsai->uid = vap->va_uid;		/* Only root may change a file's owner */
fsai->valid \|= FATTR_UID;		err = priv_check_cred(cred, PRIV_VFS_CHOWN);
		if (err) {
		/* As a special case, allow the null chown */
		err2 = fuse_internal_getattr(vp, &old_va, cred,
		td);
		if (err2)
		return (err2);
		if (vap->va_uid != old_va.va_uid)
		return err;
		else
		accmode \|= VADMIN;
		drop_suid = true;
		} else
		accmode \|= VADMIN;
		} else
		accmode \|= VADMIN;
}		}
if (vap->va_gid != (gid_t)VNOVAL) {		if (vap->va_gid != (gid_t)VNOVAL) {
facp.facc_flags \|= FACCESS_CHOWN;		if (checkperm && priv_check_cred(cred, PRIV_VFS_CHOWN))
fsai->gid = vap->va_gid;		drop_suid = true;
fsai->valid \|= FATTR_GID;		if (checkperm && !groupmember(vap->va_gid, cred))
		{
		/*
		* Non-root users may only chgrp to one of their own
		* groups
		*/
		err = priv_check_cred(cred, PRIV_VFS_CHOWN);
		if (err) {
		/* As a special case, allow the null chgrp */
		err2 = fuse_internal_getattr(vp, &old_va, cred,
		td);
		if (err2)
		return (err2);
		if (vap->va_gid != old_va.va_gid)
		return err;
		accmode \|= VADMIN;
		} else
		accmode \|= VADMIN;
		} else
		accmode \|= VADMIN;
}		}
if (vap->va_size != VNOVAL) {		if (vap->va_size != VNOVAL) {
		switch (vp->v_type) {
struct fuse_filehandle *fufh = NULL;		case VDIR:
		return (EISDIR);
/Truncate to a new value. /		case VLNK:
fsai->size = vap->va_size;		case VREG:
sizechanged = 1;		if (vfs_isrdonly(mp))
newsize = vap->va_size;		return (EROFS);
fsai->valid \|= FATTR_SIZE;		break;
		default:
fuse_filehandle_getrw(vp, FUFH_WRONLY, &fufh);		/*
if (fufh) {		* According to POSIX, the result is unspecified
fsai->fh = fufh->fh_id;		* for file types other than regular files,
fsai->valid \|= FATTR_FH;		* directories and shared memory objects. We
		* don't support shared memory objects in the file
		* system, and have dubious support for truncating
		* symlinks. Just ignore the request in other cases.
		*/
		return (0);
}		}
		/* Don't set accmode. Permission to trunc is checked upstack */
}		}
if (vap->va_atime.tv_sec != VNOVAL) {		if (vap->va_atime.tv_sec != VNOVAL \|\| vap->va_mtime.tv_sec != VNOVAL) {
fsai->atime = vap->va_atime.tv_sec;		if (vap->va_vaflags & VA_UTIMES_NULL)
fsai->atimensec = vap->va_atime.tv_nsec;		accmode \|= VWRITE;
fsai->valid \|= FATTR_ATIME;		else
		accmode \|= VADMIN;
}		}
if (vap->va_mtime.tv_sec != VNOVAL) {		if (drop_suid) {
fsai->mtime = vap->va_mtime.tv_sec;		if (vap->va_mode != (mode_t)VNOVAL)
fsai->mtimensec = vap->va_mtime.tv_nsec;		vap->va_mode &= ~(S_ISUID \| S_ISGID);
fsai->valid \|= FATTR_MTIME;		else {
		err = fuse_internal_getattr(vp, &old_va, cred, td);
		if (err)
		return (err);
		vap->va_mode = old_va.va_mode & ~(S_ISUID \| S_ISGID);
}		}
if (vap->va_mode != (mode_t)VNOVAL) {
fsai->mode = vap->va_mode & ALLPERMS;
fsai->valid \|= FATTR_MODE;
}		}
if (!fsai->valid) {		if (vap->va_mode != (mode_t)VNOVAL) {
goto out;		/* Only root may set the sticky bit on non-directories */
}		if (checkperm && vp->v_type != VDIR && (vap->va_mode & S_ISTXT)
vtyp = vnode_vtype(vp);		&& priv_check_cred(cred, PRIV_VFS_STICKYFILE))
		return EFTYPE;
if (fsai->valid & FATTR_SIZE && vtyp == VDIR) {		if (checkperm && (vap->va_mode & S_ISGID)) {
err = EISDIR;		err = fuse_internal_getattr(vp, &old_va, cred, td);
goto out;
}
if (vfs_isrdonly(vnode_mount(vp)) && (fsai->valid & ~FATTR_SIZE \|\| vtyp == VREG)) {
err = EROFS;
goto out;
}
if (fsai->valid & ~FATTR_SIZE) {
/err = fuse_internal_access(vp, VADMIN, context, &facp); /
/XXX /
err = 0;
}
facp.facc_flags &= ~FACCESS_XQUERIES;

if (err && !(fsai->valid & ~(FATTR_ATIME \| FATTR_MTIME)) &&
vap->va_vaflags & VA_UTIMES_NULL) {
err = fuse_internal_access(vp, VWRITE, &facp, td, cred);
}
if (err)		if (err)
goto out;		return (err);
if ((err = fdisp_wait_answ(&fdi)))		if (!groupmember(old_va.va_gid, cred)) {
goto out;		err = priv_check_cred(cred, PRIV_VFS_SETGID);
vtyp = IFTOVT(((struct fuse_attr_out *)fdi.answ)->attr.mode);		if (err)
		return (err);
if (vnode_vtype(vp) != vtyp) {
if (vnode_vtype(vp) == VNON && vtyp != VNON) {
SDT_PROBE2(fuse, , vnops, trace, 1, "FUSE: Dang! "
"vnode_vtype is VNON and vtype isn't.");
} else {
/*
* STALE vnode, ditch
*
* The vnode has changed its type "behind our back".
* There's nothing really we can do, so let us just
* force an internal revocation and tell the caller to
* try again, if interested.
*/
fuse_internal_vnode_disappear(vp);
err = EAGAIN;
}		}
}		}
if (err == 0) {		accmode \|= VADMIN;
struct fuse_attr_out fao = (struct fuse_attr_out)fdi.answ;
fuse_internal_cache_attrs(vp, &fao->attr, fao->attr_valid,
fao->attr_valid_nsec, NULL);
}		}

out:		if (vfs_isrdonly(mp))
fdisp_destroy(&fdi);		return EROFS;
if (!err && sizechanged) {
fuse_vnode_setsize(vp, newsize);		err = fuse_internal_access(vp, accmode, td, cred);
VTOFUD(vp)->flag &= ~FN_SIZECHANGE;		if (err)
}
return err;		return err;
		else
		return fuse_internal_setattr(vp, vap, td, cred);
}		}

/*		/*
struct vnop_strategy_args {		struct vnop_strategy_args {
struct vnode *a_vp;		struct vnode *a_vp;
struct buf *a_bp;		struct buf *a_bp;
};		};
*/		*/
static int		static int
fuse_vnop_strategy(struct vop_strategy_args *ap)		fuse_vnop_strategy(struct vop_strategy_args *ap)
{		{
struct vnode *vp = ap->a_vp;		struct vnode *vp = ap->a_vp;
struct buf *bp = ap->a_bp;		struct buf *bp = ap->a_bp;

if (!vp \|\| fuse_isdeadfs(vp)) {		if (!vp \|\| fuse_isdeadfs(vp)) {
bp->b_ioflags \|= BIO_ERROR;		bp->b_ioflags \|= BIO_ERROR;
bp->b_error = ENXIO;		bp->b_error = ENXIO;
bufdone(bp);		bufdone(bp);
return ENXIO;		return 0;
}		}
if (bp->b_iocmd == BIO_WRITE)
fuse_vnode_refreshsize(vp, NOCRED);

(void)fuse_io_strategy(vp, bp);

/*		/*
* This is a dangerous function. If returns error, that might mean a		* VOP_STRATEGY always returns zero and signals error via bp->b_ioflags.
* panic. We prefer pretty much anything over being forced to panic		* fuse_io_strategy sets bp's error fields
* by a malicious daemon (a demon?). So we just return 0 anyway. You
* should never mind this: this function has its own error
* propagation mechanism via the argument buffer, so
* not-that-melodramatic residents of the call chain still will be
* able to know what to do.
*/		*/
		(void)fuse_io_strategy(vp, bp);

return 0;		return 0;
}		}


/*		/*
struct vnop_symlink_args {		struct vnop_symlink_args {
struct vnode *a_dvp;		struct vnode *a_dvp;
struct vnode **a_vpp;		struct vnode **a_vpp;
▲ Show 20 Lines • Show All 49 Lines • ▼ Show 20 Lines
*/		*/
static int		static int
fuse_vnop_write(struct vop_write_args *ap)		fuse_vnop_write(struct vop_write_args *ap)
{		{
struct vnode *vp = ap->a_vp;		struct vnode *vp = ap->a_vp;
struct uio *uio = ap->a_uio;		struct uio *uio = ap->a_uio;
int ioflag = ap->a_ioflag;		int ioflag = ap->a_ioflag;
struct ucred *cred = ap->a_cred;		struct ucred *cred = ap->a_cred;
		pid_t pid = curthread->td_proc->p_pid;

if (fuse_isdeadfs(vp)) {		if (fuse_isdeadfs(vp)) {
return ENXIO;		return ENXIO;
}		}
fuse_vnode_refreshsize(vp, cred);

if (VTOFUD(vp)->flag & FN_DIRECTIO) {		if (VTOFUD(vp)->flag & FN_DIRECTIO) {
ioflag \|= IO_DIRECT;		ioflag \|= IO_DIRECT;
}		}

return fuse_io_dispatch(vp, uio, ioflag, cred);		return fuse_io_dispatch(vp, uio, ioflag, cred, pid);
}		}

SDT_PROBE_DEFINE1(fuse, , vnops, vnop_getpages_error, "int");		static daddr_t
/*		fuse_gbp_getblkno(struct vnode *vp, vm_ooffset_t off)
struct vnop_getpages_args {
struct vnode *a_vp;
vm_page_t *a_m;
int a_count;
int a_reqpage;
};
*/
static int
fuse_vnop_getpages(struct vop_getpages_args *ap)
{		{
int i, error, nextoff, size, toff, count, npages;		const int biosize = fuse_iosize(vp);
struct uio uio;
struct iovec iov;
vm_offset_t kva;
struct buf *bp;
struct vnode *vp;
struct thread *td;
struct ucred *cred;
vm_page_t *pages;

vp = ap->a_vp;		return (off / biosize);
KASSERT(vp->v_object, ("objectless vp passed to getpages"));
td = curthread; /* XXX */
cred = curthread->td_ucred; /* XXX */
pages = ap->a_m;
npages = ap->a_count;

if (!fsess_opt_mmap(vnode_mount(vp))) {
SDT_PROBE2(fuse, , vnops, trace, 1,
"called on non-cacheable vnode??\n");
return (VM_PAGER_ERROR);
}		}

/*		static int
* If the last page is partially valid, just return it and allow		fuse_gbp_getblksz(struct vnode *vp, daddr_t lbn)
* the pager to zero-out the blanks. Partially valid pages can		{
* only occur at the file EOF.		off_t filesize;
*		int blksz, err;
* XXXGL: is that true for FUSE, which is a local filesystem,		const int biosize = fuse_iosize(vp);
* but still somewhat disconnected from the kernel?
*/
VM_OBJECT_WLOCK(vp->v_object);
if (pages[npages - 1]->valid != 0 && --npages == 0)
goto out;
VM_OBJECT_WUNLOCK(vp->v_object);

/*		err = fuse_vnode_size(vp, &filesize, NULL, NULL);
* We use only the kva address for the buffer, but this is extremely		KASSERT(err == 0, ("vfs_bio_getpages can't handle errors here"));
* convenient and fast.		if (err)
*/		return biosize;
bp = uma_zalloc(fuse_pbuf_zone, M_WAITOK);

kva = (vm_offset_t)bp->b_data;		if ((off_t)lbn * biosize >= filesize) {
pmap_qenter(kva, pages, npages);		blksz = 0;
VM_CNT_INC(v_vnodein);		} else if ((off_t)(lbn + 1) * biosize > filesize) {
VM_CNT_ADD(v_vnodepgsin, npages);		blksz = filesize - (off_t)lbn *biosize;

count = npages << PAGE_SHIFT;
iov.iov_base = (caddr_t)kva;
iov.iov_len = count;
uio.uio_iov = &iov;
uio.uio_iovcnt = 1;
uio.uio_offset = IDX_TO_OFF(pages[0]->pindex);
uio.uio_resid = count;
uio.uio_segflg = UIO_SYSSPACE;
uio.uio_rw = UIO_READ;
uio.uio_td = td;

error = fuse_io_dispatch(vp, &uio, IO_DIRECT, cred);
pmap_qremove(kva, npages);

uma_zfree(fuse_pbuf_zone, bp);

if (error && (uio.uio_resid == count)) {
SDT_PROBE1(fuse, , vnops, vnop_getpages_error, error);
return VM_PAGER_ERROR;
}
/*
* Calculate the number of bytes read and validate only that number
* of bytes. Note that due to pending writes, size may be 0. This
* does not mean that the remaining data is invalid!
*/

size = count - uio.uio_resid;
VM_OBJECT_WLOCK(vp->v_object);
fuse_vm_page_lock_queues();
for (i = 0, toff = 0; i < npages; i++, toff = nextoff) {
vm_page_t m;

nextoff = toff + PAGE_SIZE;
m = pages[i];

if (nextoff <= size) {
/*
* Read operation filled an entire page
*/
m->valid = VM_PAGE_BITS_ALL;
KASSERT(m->dirty == 0,
("fuse_getpages: page %p is dirty", m));
} else if (size > toff) {
/*
* Read operation filled a partial page.
*/
m->valid = 0;
vm_page_set_valid_range(m, 0, size - toff);
KASSERT(m->dirty == 0,
("fuse_getpages: page %p is dirty", m));
} else {		} else {
/*		blksz = biosize;
* Read operation was short. If no error occurred
* we may have hit a zero-fill section. We simply
* leave valid set to 0.
*/
;
}		}
		return (blksz);
}		}
fuse_vm_page_unlock_queues();
out:
VM_OBJECT_WUNLOCK(vp->v_object);
if (ap->a_rbehind)
*ap->a_rbehind = 0;
if (ap->a_rahead)
*ap->a_rahead = 0;
return (VM_PAGER_OK);
}

/*		/*
struct vnop_putpages_args {		struct vnop_getpages_args {
struct vnode *a_vp;		struct vnode *a_vp;
vm_page_t *a_m;		vm_page_t *a_m;
int a_count;		int a_count;
int a_sync;		int a_reqpage;
int *a_rtvals;
vm_ooffset_t a_offset;
};		};
*/		*/
static int		static int
fuse_vnop_putpages(struct vop_putpages_args *ap)		fuse_vnop_getpages(struct vop_getpages_args *ap)
{		{
struct uio uio;		struct vnode *vp = ap->a_vp;
struct iovec iov;
vm_offset_t kva;
struct buf *bp;
int i, error, npages, count;
off_t offset;
int *rtvals;
struct vnode *vp;
struct thread *td;
struct ucred *cred;
vm_page_t *pages;
vm_ooffset_t fsize;

vp = ap->a_vp;
KASSERT(vp->v_object, ("objectless vp passed to putpages"));
fsize = vp->v_object->un_pager.vnp.vnp_size;
td = curthread; /* XXX */
cred = curthread->td_ucred; /* XXX */
pages = ap->a_m;
count = ap->a_count;
rtvals = ap->a_rtvals;
npages = btoc(count);
offset = IDX_TO_OFF(pages[0]->pindex);

if (!fsess_opt_mmap(vnode_mount(vp))) {		if (!fsess_opt_mmap(vnode_mount(vp))) {
SDT_PROBE2(fuse, , vnops, trace, 1,		SDT_PROBE2(fusefs, , vnops, trace, 1,
"called on non-cacheable vnode??\n");		"called on non-cacheable vnode??\n");
		return (VM_PAGER_ERROR);
}		}
for (i = 0; i < npages; i++)
rtvals[i] = VM_PAGER_AGAIN;

/*		return (vfs_bio_getpages(vp, ap->a_m, ap->a_count, ap->a_rbehind,
* When putting pages, do not extend file past EOF.		ap->a_rahead, fuse_gbp_getblkno, fuse_gbp_getblksz));
*/

if (offset + count > fsize) {
count = fsize - offset;
if (count < 0)
count = 0;
}		}
/*
* We use only the kva address for the buffer, but this is extremely
* convenient and fast.
*/
bp = uma_zalloc(fuse_pbuf_zone, M_WAITOK);

kva = (vm_offset_t)bp->b_data;
pmap_qenter(kva, pages, npages);
VM_CNT_INC(v_vnodeout);
VM_CNT_ADD(v_vnodepgsout, count);

iov.iov_base = (caddr_t)kva;
iov.iov_len = count;
uio.uio_iov = &iov;
uio.uio_iovcnt = 1;
uio.uio_offset = offset;
uio.uio_resid = count;
uio.uio_segflg = UIO_SYSSPACE;
uio.uio_rw = UIO_WRITE;
uio.uio_td = td;

error = fuse_io_dispatch(vp, &uio, IO_DIRECT, cred);

pmap_qremove(kva, npages);
uma_zfree(fuse_pbuf_zone, bp);

if (!error) {
int nwritten = round_page(count - uio.uio_resid) / PAGE_SIZE;

for (i = 0; i < nwritten; i++) {
rtvals[i] = VM_PAGER_OK;
VM_OBJECT_WLOCK(pages[i]->object);
vm_page_undirty(pages[i]);
VM_OBJECT_WUNLOCK(pages[i]->object);
}
}
return rtvals[0];
}

static const char extattr_namespace_separator = '.';		static const char extattr_namespace_separator = '.';

/*		/*
struct vop_getextattr_args {		struct vop_getextattr_args {
struct vop_generic_args a_gen;		struct vop_generic_args a_gen;
struct vnode *a_vp;		struct vnode *a_vp;
int a_attrnamespace;		int a_attrnamespace;
const char *a_name;		const char *a_name;
Show All 17 Lines	fuse_vnop_getextattr(struct vop_getextattr_args *ap)
char *prefix;		char *prefix;
char *attr_str;		char *attr_str;
size_t len;		size_t len;
int err;		int err;

if (fuse_isdeadfs(vp))		if (fuse_isdeadfs(vp))
return (ENXIO);		return (ENXIO);

		if (!fsess_isimpl(mp, FUSE_GETXATTR))
		return EOPNOTSUPP;

		err = fuse_extattr_check_cred(vp, ap->a_attrnamespace, cred, td, VREAD);
		if (err)
		return err;

/* Default to looking for user attributes. */		/* Default to looking for user attributes. */
if (ap->a_attrnamespace == EXTATTR_NAMESPACE_SYSTEM)		if (ap->a_attrnamespace == EXTATTR_NAMESPACE_SYSTEM)
prefix = EXTATTR_NAMESPACE_SYSTEM_STRING;		prefix = EXTATTR_NAMESPACE_SYSTEM_STRING;
else		else
prefix = EXTATTR_NAMESPACE_USER_STRING;		prefix = EXTATTR_NAMESPACE_USER_STRING;

len = strlen(prefix) + sizeof(extattr_namespace_separator) +		len = strlen(prefix) + sizeof(extattr_namespace_separator) +
strlen(ap->a_name) + 1;		strlen(ap->a_name) + 1;
Show All 14 Lines	else
get_xattr_in->size = uio->uio_resid;		get_xattr_in->size = uio->uio_resid;

attr_str = (char )fdi.indata + sizeof(get_xattr_in);		attr_str = (char )fdi.indata + sizeof(get_xattr_in);
snprintf(attr_str, len, "%s%c%s", prefix, extattr_namespace_separator,		snprintf(attr_str, len, "%s%c%s", prefix, extattr_namespace_separator,
ap->a_name);		ap->a_name);

err = fdisp_wait_answ(&fdi);		err = fdisp_wait_answ(&fdi);
if (err != 0) {		if (err != 0) {
if (err == ENOSYS)		if (err == ENOSYS) {
fsess_set_notimpl(mp, FUSE_GETXATTR);		fsess_set_notimpl(mp, FUSE_GETXATTR);
		err = EOPNOTSUPP;
		}
goto out;		goto out;
}		}

get_xattr_out = fdi.answ;		get_xattr_out = fdi.answ;

if (ap->a_size != NULL)		if (ap->a_size != NULL)
*ap->a_size = get_xattr_out->size;		*ap->a_size = get_xattr_out->size;

Show All 29 Lines	fuse_vnop_setextattr(struct vop_setextattr_args *ap)
char *prefix;		char *prefix;
size_t len;		size_t len;
char *attr_str;		char *attr_str;
int err;		int err;

if (fuse_isdeadfs(vp))		if (fuse_isdeadfs(vp))
return (ENXIO);		return (ENXIO);

		if (!fsess_isimpl(mp, FUSE_SETXATTR))
		return EOPNOTSUPP;

		if (vfs_isrdonly(mp))
		return EROFS;

		/* Deleting xattrs must use VOP_DELETEEXTATTR instead */
		if (ap->a_uio == NULL) {
		/*
		* If we got here as fallback from VOP_DELETEEXTATTR, then
		* return EOPNOTSUPP.
		*/
		if (!fsess_isimpl(mp, FUSE_REMOVEXATTR))
		return (EOPNOTSUPP);
		else
		return (EINVAL);
		}

		err = fuse_extattr_check_cred(vp, ap->a_attrnamespace, cred, td,
		VWRITE);
		if (err)
		return err;

/* Default to looking for user attributes. */		/* Default to looking for user attributes. */
if (ap->a_attrnamespace == EXTATTR_NAMESPACE_SYSTEM)		if (ap->a_attrnamespace == EXTATTR_NAMESPACE_SYSTEM)
prefix = EXTATTR_NAMESPACE_SYSTEM_STRING;		prefix = EXTATTR_NAMESPACE_SYSTEM_STRING;
else		else
prefix = EXTATTR_NAMESPACE_USER_STRING;		prefix = EXTATTR_NAMESPACE_USER_STRING;

len = strlen(prefix) + sizeof(extattr_namespace_separator) +		len = strlen(prefix) + sizeof(extattr_namespace_separator) +
strlen(ap->a_name) + 1;		strlen(ap->a_name) + 1;
Show All 11 Lines	fuse_vnop_setextattr(struct vop_setextattr_args *ap)
err = uiomove((char )fdi.indata + sizeof(set_xattr_in) + len,		err = uiomove((char )fdi.indata + sizeof(set_xattr_in) + len,
uio->uio_resid, uio);		uio->uio_resid, uio);
if (err != 0) {		if (err != 0) {
goto out;		goto out;
}		}

err = fdisp_wait_answ(&fdi);		err = fdisp_wait_answ(&fdi);

if (err != 0) {		if (err == ENOSYS) {
if (err == ENOSYS)
fsess_set_notimpl(mp, FUSE_SETXATTR);		fsess_set_notimpl(mp, FUSE_SETXATTR);
goto out;		err = EOPNOTSUPP;
}		}
		if (err == ERESTART) {
		/* Can't restart after calling uiomove */
		err = EINTR;
		}

out:		out:
fdisp_destroy(&fdi);		fdisp_destroy(&fdi);
return (err);		return (err);
}		}

/*		/*
* The Linux / FUSE extended attribute list is simply a collection of		* The Linux / FUSE extended attribute list is simply a collection of
▲ Show 20 Lines • Show All 79 Lines • ▼ Show 20 Lines	fuse_vnop_listextattr(struct vop_listextattr_args *ap)
char *linux_list;		char *linux_list;
int bsd_list_len;		int bsd_list_len;
int linux_list_len;		int linux_list_len;
int err;		int err;

if (fuse_isdeadfs(vp))		if (fuse_isdeadfs(vp))
return (ENXIO);		return (ENXIO);

		if (!fsess_isimpl(mp, FUSE_LISTXATTR))
		return EOPNOTSUPP;

		err = fuse_extattr_check_cred(vp, ap->a_attrnamespace, cred, td, VREAD);
		if (err)
		return err;

/*		/*
* Add space for a NUL and the period separator if enabled.		* Add space for a NUL and the period separator if enabled.
* Default to looking for user attributes.		* Default to looking for user attributes.
*/		*/
if (ap->a_attrnamespace == EXTATTR_NAMESPACE_SYSTEM)		if (ap->a_attrnamespace == EXTATTR_NAMESPACE_SYSTEM)
prefix = EXTATTR_NAMESPACE_SYSTEM_STRING;		prefix = EXTATTR_NAMESPACE_SYSTEM_STRING;
else		else
prefix = EXTATTR_NAMESPACE_USER_STRING;		prefix = EXTATTR_NAMESPACE_USER_STRING;

len = strlen(prefix) + sizeof(extattr_namespace_separator) + 1;		len = strlen(prefix) + sizeof(extattr_namespace_separator) + 1;

fdisp_init(&fdi, sizeof(*list_xattr_in) + len);		fdisp_init(&fdi, sizeof(*list_xattr_in) + len);
fdisp_make_vp(&fdi, FUSE_LISTXATTR, vp, td, cred);		fdisp_make_vp(&fdi, FUSE_LISTXATTR, vp, td, cred);

/*		/*
* Retrieve Linux / FUSE compatible list size.		* Retrieve Linux / FUSE compatible list size.
*/		*/
list_xattr_in = fdi.indata;		list_xattr_in = fdi.indata;
list_xattr_in->size = 0;		list_xattr_in->size = 0;
attr_str = (char )fdi.indata + sizeof(list_xattr_in);		attr_str = (char )fdi.indata + sizeof(list_xattr_in);
snprintf(attr_str, len, "%s%c", prefix, extattr_namespace_separator);		snprintf(attr_str, len, "%s%c", prefix, extattr_namespace_separator);

err = fdisp_wait_answ(&fdi);		err = fdisp_wait_answ(&fdi);
if (err != 0) {		if (err != 0) {
if (err == ENOSYS)		if (err == ENOSYS) {
fsess_set_notimpl(mp, FUSE_LISTXATTR);		fsess_set_notimpl(mp, FUSE_LISTXATTR);
		err = EOPNOTSUPP;
		}
goto out;		goto out;
}		}

list_xattr_out = fdi.answ;		list_xattr_out = fdi.answ;
linux_list_len = list_xattr_out->size;		linux_list_len = list_xattr_out->size;
if (linux_list_len == 0) {		if (linux_list_len == 0) {
if (ap->a_size != NULL)		if (ap->a_size != NULL)
*ap->a_size = linux_list_len;		*ap->a_size = linux_list_len;
goto out;		goto out;
}		}

/*		/*
* Retrieve Linux / FUSE compatible list values.		* Retrieve Linux / FUSE compatible list values.
*/		*/
fdisp_make_vp(&fdi, FUSE_LISTXATTR, vp, td, cred);		fdisp_refresh_vp(&fdi, FUSE_LISTXATTR, vp, td, cred);
list_xattr_in = fdi.indata;		list_xattr_in = fdi.indata;
list_xattr_in->size = linux_list_len + sizeof(*list_xattr_out);		list_xattr_in->size = linux_list_len + sizeof(*list_xattr_out);
attr_str = (char )fdi.indata + sizeof(list_xattr_in);		attr_str = (char )fdi.indata + sizeof(list_xattr_in);
snprintf(attr_str, len, "%s%c", prefix, extattr_namespace_separator);		snprintf(attr_str, len, "%s%c", prefix, extattr_namespace_separator);

err = fdisp_wait_answ(&fdi);		err = fdisp_wait_answ(&fdi);
if (err != 0)		if (err != 0)
goto out;		goto out;
▲ Show 20 Lines • Show All 46 Lines • ▼ Show 20 Lines	fuse_vnop_deleteextattr(struct vop_deleteextattr_args *ap)
char *prefix;		char *prefix;
size_t len;		size_t len;
char *attr_str;		char *attr_str;
int err;		int err;

if (fuse_isdeadfs(vp))		if (fuse_isdeadfs(vp))
return (ENXIO);		return (ENXIO);

		if (!fsess_isimpl(mp, FUSE_REMOVEXATTR))
		return EOPNOTSUPP;

		if (vfs_isrdonly(mp))
		return EROFS;

		err = fuse_extattr_check_cred(vp, ap->a_attrnamespace, cred, td,
		VWRITE);
		if (err)
		return err;

/* Default to looking for user attributes. */		/* Default to looking for user attributes. */
if (ap->a_attrnamespace == EXTATTR_NAMESPACE_SYSTEM)		if (ap->a_attrnamespace == EXTATTR_NAMESPACE_SYSTEM)
prefix = EXTATTR_NAMESPACE_SYSTEM_STRING;		prefix = EXTATTR_NAMESPACE_SYSTEM_STRING;
else		else
prefix = EXTATTR_NAMESPACE_USER_STRING;		prefix = EXTATTR_NAMESPACE_USER_STRING;

len = strlen(prefix) + sizeof(extattr_namespace_separator) +		len = strlen(prefix) + sizeof(extattr_namespace_separator) +
strlen(ap->a_name) + 1;		strlen(ap->a_name) + 1;

fdisp_init(&fdi, len);		fdisp_init(&fdi, len);
fdisp_make_vp(&fdi, FUSE_REMOVEXATTR, vp, td, cred);		fdisp_make_vp(&fdi, FUSE_REMOVEXATTR, vp, td, cred);

attr_str = fdi.indata;		attr_str = fdi.indata;
snprintf(attr_str, len, "%s%c%s", prefix, extattr_namespace_separator,		snprintf(attr_str, len, "%s%c%s", prefix, extattr_namespace_separator,
ap->a_name);		ap->a_name);

err = fdisp_wait_answ(&fdi);		err = fdisp_wait_answ(&fdi);
if (err != 0) {		if (err == ENOSYS) {
if (err == ENOSYS)
fsess_set_notimpl(mp, FUSE_REMOVEXATTR);		fsess_set_notimpl(mp, FUSE_REMOVEXATTR);
		err = EOPNOTSUPP;
}		}

fdisp_destroy(&fdi);		fdisp_destroy(&fdi);
return (err);		return (err);
}		}

/*		/*
struct vnop_print_args {		struct vnop_print_args {
struct vnode *a_vp;		struct vnode *a_vp;
};		};
*/		*/
static int		static int
fuse_vnop_print(struct vop_print_args *ap)		fuse_vnop_print(struct vop_print_args *ap)
{		{
struct fuse_vnode_data *fvdat = VTOFUD(ap->a_vp);		struct fuse_vnode_data *fvdat = VTOFUD(ap->a_vp);

printf("nodeid: %ju, parent nodeid: %ju, nlookup: %ju, flag: %#x\n",		printf("nodeid: %ju, parent nodeid: %ju, nlookup: %ju, flag: %#x\n",
(uintmax_t)VTOILLU(ap->a_vp), (uintmax_t)fvdat->parent_nid,		(uintmax_t)VTOILLU(ap->a_vp), (uintmax_t)fvdat->parent_nid,
(uintmax_t)fvdat->nlookup,		(uintmax_t)fvdat->nlookup,
fvdat->flag);		fvdat->flag);

return 0;		return 0;
}		}

		/*
		* Get an NFS filehandle for a FUSE file.
		*
		* This will only work for FUSE file systems that guarantee the uniqueness of
		* nodeid:generation, which most don't.
		*/
		/*
		vop_vptofh {
		IN struct vnode *a_vp;
		IN struct fid *a_fhp;
		};
		*/
		static int
		fuse_vnop_vptofh(struct vop_vptofh_args *ap)
		{
		struct vnode *vp = ap->a_vp;
		struct fuse_vnode_data *fvdat = VTOFUD(vp);
		struct fuse_fid fhp = (struct fuse_fid )(ap->a_fhp);
		_Static_assert(sizeof(struct fuse_fid) <= sizeof(struct fid),
		"FUSE fid type is too big");
		struct mount *mp = vnode_mount(vp);
		struct fuse_data *data = fuse_get_mpdata(mp);
		struct vattr va;
		int err;

		if (!(data->dataflags & FSESS_EXPORT_SUPPORT))
		return EOPNOTSUPP;

		err = fuse_internal_getattr(vp, &va, curthread->td_ucred, curthread);
		if (err)
		return err;

		/ip = VTOI(ap->a_vp);/
		/ufhp = (struct ufid )ap->a_fhp;*/
		fhp->len = sizeof(struct fuse_fid);
		fhp->nid = fvdat->nid;
		if (fvdat->generation <= UINT32_MAX)
		fhp->gen = fvdat->generation;
		else
		return EOVERFLOW;
		return (0);
		}