diff --git a/sys/compat/linuxkpi/common/include/linux/sysfs.h b/sys/compat/linuxkpi/common/include/linux/sysfs.h index 0b6b479d9362..e6b8ad210f16 100644 --- a/sys/compat/linuxkpi/common/include/linux/sysfs.h +++ b/sys/compat/linuxkpi/common/include/linux/sysfs.h @@ -1,300 +1,300 @@ /*- * Copyright (c) 2010 Isilon Systems, Inc. * Copyright (c) 2010 iX Systems, Inc. * Copyright (c) 2010 Panasas, Inc. * Copyright (c) 2013, 2014 Mellanox Technologies, Ltd. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice unmodified, this list of conditions, and the following * disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * $FreeBSD$ */ #ifndef _LINUXKPI_LINUX_SYSFS_H_ #define _LINUXKPI_LINUX_SYSFS_H_ #include #include #include #include #include struct sysfs_ops { ssize_t (*show)(struct kobject *, struct attribute *, char *); ssize_t (*store)(struct kobject *, struct attribute *, const char *, size_t); }; struct attribute_group { const char *name; mode_t (*is_visible)(struct kobject *, struct attribute *, int); struct attribute **attrs; }; #define __ATTR(_name, _mode, _show, _store) { \ .attr = { .name = __stringify(_name), .mode = _mode }, \ .show = _show, .store = _store, \ } #define __ATTR_RO(_name) __ATTR(_name, 0444, _name##_show, NULL) #define __ATTR_WO(_name) __ATTR(_name, 0200, NULL, _name##_store) #define __ATTR_RW(_name) __ATTR(_name, 0644, _name##_show, _name##_store) #define __ATTR_NULL { .attr = { .name = NULL } } #define ATTRIBUTE_GROUPS(_name) \ static struct attribute_group _name##_group = { \ .name = __stringify(_name), \ .attrs = _name##_attrs, \ }; \ static const struct attribute_group *_name##_groups[] = { \ &_name##_group, \ NULL, \ } /* * Handle our generic '\0' terminated 'C' string. * Two cases: * a variable string: point arg1 at it, arg2 is max length. * a constant string: point arg1 at it, arg2 is zero. */ static inline int sysctl_handle_attr(SYSCTL_HANDLER_ARGS) { struct kobject *kobj; struct attribute *attr; const struct sysfs_ops *ops; char *buf; int error; ssize_t len; kobj = arg1; attr = (struct attribute *)(intptr_t)arg2; if (kobj->ktype == NULL || kobj->ktype->sysfs_ops == NULL) return (ENODEV); buf = (char *)get_zeroed_page(GFP_KERNEL); if (buf == NULL) return (ENOMEM); ops = kobj->ktype->sysfs_ops; if (ops->show) { len = ops->show(kobj, attr, buf); /* * It's valid to not have a 'show' so just return an * empty string. */ if (len < 0) { error = -len; if (error != EIO) goto out; buf[0] = '\0'; } else if (len) { len--; if (len >= PAGE_SIZE) len = PAGE_SIZE - 1; /* Trim trailing newline. */ buf[len] = '\0'; } } /* Leave one trailing byte to append a newline. */ error = sysctl_handle_string(oidp, buf, PAGE_SIZE - 1, req); if (error != 0 || req->newptr == NULL || ops->store == NULL) goto out; len = strlcat(buf, "\n", PAGE_SIZE); KASSERT(len < PAGE_SIZE, ("new attribute truncated")); len = ops->store(kobj, attr, buf, len); if (len < 0) error = -len; out: free_page((unsigned long)buf); return (error); } static inline int sysfs_create_file(struct kobject *kobj, const struct attribute *attr) { struct sysctl_oid *oid; oid = SYSCTL_ADD_OID(NULL, SYSCTL_CHILDREN(kobj->oidp), OID_AUTO, attr->name, CTLTYPE_STRING|CTLFLAG_RW|CTLFLAG_MPSAFE, kobj, (uintptr_t)attr, sysctl_handle_attr, "A", ""); if (!oid) { return (-ENOMEM); } return (0); } static inline void sysfs_remove_file(struct kobject *kobj, const struct attribute *attr) { if (kobj->oidp) sysctl_remove_name(kobj->oidp, attr->name, 1, 1); } static inline int sysfs_create_files(struct kobject *kobj, const struct attribute * const *attrs) { int error = 0; int i; for (i = 0; attrs[i] && !error; i++) error = sysfs_create_file(kobj, attrs[i]); while (error && --i >= 0) sysfs_remove_file(kobj, attrs[i]); return (error); } static inline void sysfs_remove_files(struct kobject *kobj, const struct attribute * const *attrs) { int i; for (i = 0; attrs[i]; i++) sysfs_remove_file(kobj, attrs[i]); } static inline int sysfs_create_group(struct kobject *kobj, const struct attribute_group *grp) { struct attribute **attr; struct sysctl_oid *oidp; /* Don't create the group node if grp->name is undefined. */ if (grp->name) oidp = SYSCTL_ADD_NODE(NULL, SYSCTL_CHILDREN(kobj->oidp), OID_AUTO, grp->name, CTLFLAG_RD|CTLFLAG_MPSAFE, NULL, grp->name); else oidp = kobj->oidp; for (attr = grp->attrs; *attr != NULL; attr++) { SYSCTL_ADD_OID(NULL, SYSCTL_CHILDREN(oidp), OID_AUTO, (*attr)->name, CTLTYPE_STRING|CTLFLAG_RW|CTLFLAG_MPSAFE, kobj, (uintptr_t)*attr, sysctl_handle_attr, "A", ""); } return (0); } static inline void sysfs_remove_group(struct kobject *kobj, const struct attribute_group *grp) { if (kobj->oidp) sysctl_remove_name(kobj->oidp, grp->name, 1, 1); } static inline int sysfs_create_groups(struct kobject *kobj, const struct attribute_group **grps) { int error = 0; int i; if (grps == NULL) goto done; for (i = 0; grps[i] && !error; i++) error = sysfs_create_group(kobj, grps[i]); while (error && --i >= 0) sysfs_remove_group(kobj, grps[i]); done: return (error); } static inline void sysfs_remove_groups(struct kobject *kobj, const struct attribute_group **grps) { int i; if (grps == NULL) return; for (i = 0; grps[i]; i++) sysfs_remove_group(kobj, grps[i]); } static inline int sysfs_merge_group(struct kobject *kobj, const struct attribute_group *grp) { /* Really expected behavior is to return failure if group exists. */ return (sysfs_create_group(kobj, grp)); } static inline void sysfs_unmerge_group(struct kobject *kobj, const struct attribute_group *grp) { struct attribute **attr; struct sysctl_oid *oidp; - SLIST_FOREACH(oidp, SYSCTL_CHILDREN(kobj->oidp), oid_link) { + SYSCTL_FOREACH(oidp, SYSCTL_CHILDREN(kobj->oidp)) { if (strcmp(oidp->oid_name, grp->name) != 0) continue; for (attr = grp->attrs; *attr != NULL; attr++) { sysctl_remove_name(oidp, (*attr)->name, 1, 1); } } } static inline int sysfs_create_dir(struct kobject *kobj) { struct sysctl_oid *oid; oid = SYSCTL_ADD_NODE(NULL, SYSCTL_CHILDREN(kobj->parent->oidp), OID_AUTO, kobj->name, CTLFLAG_RD|CTLFLAG_MPSAFE, NULL, kobj->name); if (!oid) { return (-ENOMEM); } kobj->oidp = oid; return (0); } static inline void sysfs_remove_dir(struct kobject *kobj) { if (kobj->oidp == NULL) return; sysctl_remove_oid(kobj->oidp, 1, 1); } static inline bool sysfs_streq(const char *s1, const char *s2) { int l1, l2; l1 = strlen(s1); l2 = strlen(s2); if (l1 != 0 && s1[l1-1] == '\n') l1--; if (l2 != 0 && s2[l2-1] == '\n') l2--; return (l1 == l2 && strncmp(s1, s2, l1) == 0); } #define sysfs_attr_init(attr) do {} while(0) #endif /* _LINUXKPI_LINUX_SYSFS_H_ */