Differential D23915 Diff 73966 sys/fs/tmpfs/tmpfs_vnops.c

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sys/fs/tmpfs/tmpfs_vnops.c

Show First 20 Lines • Show All 311 Lines • ▼ Show 20 Lines	tmpfs_close(struct vop_close_args *v)
struct vnode *vp = v->a_vp;		struct vnode *vp = v->a_vp;

/* Update node times. */		/* Update node times. */
tmpfs_update(vp);		tmpfs_update(vp);

return (0);		return (0);
}		}

		/*
		* VOP_FPLOOKUP_VEXEC routines are subject to special circumstances, see
		* the comment above cache_fplookup for details.
		*/
int		int
		tmpfs_fplookup_vexec(struct vop_fplookup_vexec_args *v)
		{
		struct vnode *vp;
		struct tmpfs_node *node;
		struct ucred *cred;
		mode_t all_x, mode;

		vp = v->a_vp;
		node = VP_TO_TMPFS_NODE_SMR(vp);
		if (__predict_false(node == NULL))
		return (EAGAIN);

		all_x = S_IXUSR \| S_IXGRP \| S_IXOTH;
		mode = atomic_load_int(&node->tn_mode);
		if (__predict_true((mode & all_x) == all_x))
		return (0);

		cred = v->a_cred;
		return (vaccess_vexec_smr(mode, node->tn_uid, node->tn_gid, cred));
		}

		int
tmpfs_access(struct vop_access_args *v)		tmpfs_access(struct vop_access_args *v)
{		{
struct vnode *vp = v->a_vp;		struct vnode *vp = v->a_vp;
accmode_t accmode = v->a_accmode;		accmode_t accmode = v->a_accmode;
struct ucred *cred = v->a_cred;		struct ucred *cred = v->a_cred;
mode_t all_x = S_IXUSR \| S_IXGRP \| S_IXOTH;		mode_t all_x = S_IXUSR \| S_IXGRP \| S_IXOTH;
int error;		int error;
struct tmpfs_node *node;		struct tmpfs_node *node;
▲ Show 20 Lines • Show All 94 Lines • ▼ Show 20 Lines	tmpfs_setattr(struct vop_setattr_args *v)
struct vattr *vap = v->a_vap;		struct vattr *vap = v->a_vap;
struct ucred *cred = v->a_cred;		struct ucred *cred = v->a_cred;
struct thread *td = curthread;		struct thread *td = curthread;

int error;		int error;

MPASS(VOP_ISLOCKED(vp));		MPASS(VOP_ISLOCKED(vp));

		vn_seqc_write_begin(vp);

error = 0;		error = 0;

/* Abort if any unsettable attribute is given. */		/* Abort if any unsettable attribute is given. */
if (vap->va_type != VNON \|\|		if (vap->va_type != VNON \|\|
vap->va_nlink != VNOVAL \|\|		vap->va_nlink != VNOVAL \|\|
vap->va_fsid != VNOVAL \|\|		vap->va_fsid != VNOVAL \|\|
vap->va_fileid != VNOVAL \|\|		vap->va_fileid != VNOVAL \|\|
vap->va_blocksize != VNOVAL \|\|		vap->va_blocksize != VNOVAL \|\|
Show All 22 Lines	if (error == 0 && ((vap->va_atime.tv_sec != VNOVAL &&
vap->va_birthtime.tv_nsec != VNOVAL)))		vap->va_birthtime.tv_nsec != VNOVAL)))
error = tmpfs_chtimes(vp, vap, cred, td);		error = tmpfs_chtimes(vp, vap, cred, td);

/* Update the node times. We give preference to the error codes		/* Update the node times. We give preference to the error codes
* generated by this function rather than the ones that may arise		* generated by this function rather than the ones that may arise
* from tmpfs_update. */		* from tmpfs_update. */
tmpfs_update(vp);		tmpfs_update(vp);

		vn_seqc_write_end(vp);

MPASS(VOP_ISLOCKED(vp));		MPASS(VOP_ISLOCKED(vp));

return error;		return error;
}		}

static int		static int
tmpfs_read(struct vop_read_args *v)		tmpfs_read(struct vop_read_args *v)
{		{
▲ Show 20 Lines • Show All 324 Lines • ▼ Show 20 Lines	tmpfs_rename(struct vop_rename_args *v)
char *newname;		char *newname;
struct tmpfs_dirent *de;		struct tmpfs_dirent *de;
struct tmpfs_mount *tmp;		struct tmpfs_mount *tmp;
struct tmpfs_node *fdnode;		struct tmpfs_node *fdnode;
struct tmpfs_node *fnode;		struct tmpfs_node *fnode;
struct tmpfs_node *tnode;		struct tmpfs_node *tnode;
struct tmpfs_node *tdnode;		struct tmpfs_node *tdnode;
int error;		int error;
		bool want_seqc_end;

MPASS(VOP_ISLOCKED(tdvp));		MPASS(VOP_ISLOCKED(tdvp));
MPASS(IMPLIES(tvp != NULL, VOP_ISLOCKED(tvp)));		MPASS(IMPLIES(tvp != NULL, VOP_ISLOCKED(tvp)));
MPASS(fcnp->cn_flags & HASBUF);		MPASS(fcnp->cn_flags & HASBUF);
MPASS(tcnp->cn_flags & HASBUF);		MPASS(tcnp->cn_flags & HASBUF);

		want_seqc_end = false;

/*		/*
* Disallow cross-device renames.		* Disallow cross-device renames.
* XXX Why isn't this done by the caller?		* XXX Why isn't this done by the caller?
*/		*/
if (fvp->v_mount != tdvp->v_mount \|\|		if (fvp->v_mount != tdvp->v_mount \|\|
(tvp != NULL && fvp->v_mount != tvp->v_mount)) {		(tvp != NULL && fvp->v_mount != tvp->v_mount)) {
error = EXDEV;		error = EXDEV;
goto out;		goto out;
Show All 24 Lines	if (vn_lock(fdvp, LK_EXCLUSIVE \| LK_NOWAIT) != 0) {
"tmpfs_rename: tvp not locked");		"tmpfs_rename: tvp not locked");
if (fvp == tvp) {		if (fvp == tvp) {
error = 0;		error = 0;
goto out_locked;		goto out_locked;
}		}
}		}
}		}

		if (tvp != NULL)
		vn_seqc_write_begin(tvp);
		vn_seqc_write_begin(tdvp);
		vn_seqc_write_begin(fvp);
		vn_seqc_write_begin(fdvp);
		want_seqc_end = true;

tmp = VFS_TO_TMPFS(tdvp->v_mount);		tmp = VFS_TO_TMPFS(tdvp->v_mount);
tdnode = VP_TO_TMPFS_DIR(tdvp);		tdnode = VP_TO_TMPFS_DIR(tdvp);
tnode = (tvp == NULL) ? NULL : VP_TO_TMPFS_NODE(tvp);		tnode = (tvp == NULL) ? NULL : VP_TO_TMPFS_NODE(tvp);
fdnode = VP_TO_TMPFS_DIR(fdvp);		fdnode = VP_TO_TMPFS_DIR(fdvp);
fnode = VP_TO_TMPFS_NODE(fvp);		fnode = VP_TO_TMPFS_NODE(fvp);
de = tmpfs_dir_lookup(fdnode, fnode, fcnp);		de = tmpfs_dir_lookup(fdnode, fnode, fcnp);

/*		/*
▲ Show 20 Lines • Show All 197 Lines • ▼ Show 20 Lines	tmpfs_rename(struct vop_rename_args *v)

error = 0;		error = 0;

out_locked:		out_locked:
if (fdvp != tdvp && fdvp != tvp)		if (fdvp != tdvp && fdvp != tvp)
VOP_UNLOCK(fdvp);		VOP_UNLOCK(fdvp);

out:		out:
		if (want_seqc_end) {
		if (tvp != NULL)
		vn_seqc_write_end(tvp);
		vn_seqc_write_end(tdvp);
		vn_seqc_write_end(fvp);
		vn_seqc_write_end(fdvp);
		}

/*		/*
* Release target nodes.		* Release target nodes.
* XXX: I don't understand when tdvp can be the same as tvp, but		* XXX: I don't understand when tdvp can be the same as tvp, but
* other code takes care of this...		* other code takes care of this...
*/		*/
if (tdvp == tvp)		if (tdvp == tvp)
vrele(tdvp);		vrele(tdvp);
else		else
▲ Show 20 Lines • Show All 540 Lines • ▼ Show 20 Lines
struct vop_vector tmpfs_vnodeop_entries = {		struct vop_vector tmpfs_vnodeop_entries = {
.vop_default = &default_vnodeops,		.vop_default = &default_vnodeops,
.vop_lookup = vfs_cache_lookup,		.vop_lookup = vfs_cache_lookup,
.vop_cachedlookup = tmpfs_cached_lookup,		.vop_cachedlookup = tmpfs_cached_lookup,
.vop_create = tmpfs_create,		.vop_create = tmpfs_create,
.vop_mknod = tmpfs_mknod,		.vop_mknod = tmpfs_mknod,
.vop_open = tmpfs_open,		.vop_open = tmpfs_open,
.vop_close = tmpfs_close,		.vop_close = tmpfs_close,
		.vop_fplookup_vexec = tmpfs_fplookup_vexec,
.vop_access = tmpfs_access,		.vop_access = tmpfs_access,
.vop_getattr = tmpfs_getattr,		.vop_getattr = tmpfs_getattr,
.vop_setattr = tmpfs_setattr,		.vop_setattr = tmpfs_setattr,
.vop_read = tmpfs_read,		.vop_read = tmpfs_read,
.vop_write = tmpfs_write,		.vop_write = tmpfs_write,
.vop_fsync = tmpfs_fsync,		.vop_fsync = tmpfs_fsync,
.vop_remove = tmpfs_remove,		.vop_remove = tmpfs_remove,
.vop_link = tmpfs_link,		.vop_link = tmpfs_link,
Show All 29 Lines