diff options
Diffstat (limited to 'include/sysfs.h')
| -rw-r--r-- | include/sysfs.h | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/include/sysfs.h b/include/sysfs.h new file mode 100644 index 0000000..8d77f75 --- /dev/null +++ b/include/sysfs.h @@ -0,0 +1,126 @@ +/* + * No copyright is claimed. This code is in the public domain; do with + * it what you wish. + * + * Copyright (C) 2011 Karel Zak <kzak@redhat.com> + */ +#ifndef UTIL_LINUX_SYSFS_H +#define UTIL_LINUX_SYSFS_H + + +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> +#include <stdint.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <fcntl.h> +#include <string.h> +#include <inttypes.h> +#include <dirent.h> + +#include "path.h" + +/** + * sysfs_devname_sys_to_dev: + * @name: devname to be converted in place + * + * Linux kernel linux/drivers/base/core.c: device_get_devnode() + * defines a replacement of '!' in the /sys device name by '/' in the + * /dev device name. This helper replaces all occurrences of '!' in + * @name by '/' to convert from /sys to /dev. + */ +static inline void sysfs_devname_sys_to_dev(char *name) +{ + char *c; + + if (name) + while ((c = strchr(name, '!'))) + c[0] = '/'; +} + +/** + * sysfs_devname_dev_to_sys: + * @name: devname to be converted in place + * + * See sysfs_devname_sys_to_dev(). + */ +static inline void sysfs_devname_dev_to_sys(char *name) +{ + char *c; + + if (name) + while ((c = strchr(name, '/'))) + c[0] = '!'; +} + +struct sysfs_blkdev { + dev_t devno; + struct path_cxt *parent; + + unsigned int scsi_host, + scsi_channel, + scsi_target, + scsi_lun; + + unsigned int has_hctl : 1, + hctl_error : 1 ; +}; + +void ul_sysfs_init_debug(void); + +struct path_cxt *ul_new_sysfs_path(dev_t devno, struct path_cxt *parent, const char *prefix); +int sysfs_blkdev_init_path(struct path_cxt *pc, dev_t devno, struct path_cxt *parent); + +int sysfs_blkdev_set_parent(struct path_cxt *pc, struct path_cxt *parent); +struct path_cxt *sysfs_blkdev_get_parent(struct path_cxt *pc); + +char *sysfs_blkdev_get_name(struct path_cxt *pc, char *buf, size_t bufsiz); +int sysfs_blkdev_is_partition_dirent(DIR *dir, struct dirent *d, const char *parent_name); +int sysfs_blkdev_count_partitions(struct path_cxt *pc, const char *devname); +dev_t sysfs_blkdev_partno_to_devno(struct path_cxt *pc, int partno); +char *sysfs_blkdev_get_slave(struct path_cxt *pc); +char *sysfs_blkdev_get_path(struct path_cxt *pc, char *buf, size_t bufsiz); +dev_t sysfs_blkdev_get_devno(struct path_cxt *pc); + +char *sysfs_blkdev_get_devchain(struct path_cxt *pc, char *buf, size_t bufsz); +int sysfs_blkdev_next_subsystem(struct path_cxt *pc __attribute__((unused)), char *devchain, char **subsys); + +int sysfs_blkdev_is_hotpluggable(struct path_cxt *pc); +int sysfs_blkdev_is_removable(struct path_cxt *pc); +int sysfs_blkdev_get_wholedisk( struct path_cxt *pc, + char *diskname, + size_t len, + dev_t *diskdevno); + +int sysfs_devno_to_wholedisk(dev_t dev, char *diskname, + size_t len, dev_t *diskdevno); +int sysfs_devno_is_dm_private(dev_t devno, char **uuid); +int sysfs_devno_is_wholedisk(dev_t devno); + +dev_t sysfs_devname_to_devno(const char *name); +dev_t __sysfs_devname_to_devno(const char *prefix, const char *name, const char *parent); +int sysfs_devname_is_hidden(const char *prefix, const char *name); + +char *sysfs_devno_to_devpath(dev_t devno, char *buf, size_t bufsiz); +char *sysfs_devno_to_devname(dev_t devno, char *buf, size_t bufsiz); +int sysfs_devno_count_partitions(dev_t devno); + +int sysfs_blkdev_scsi_get_hctl(struct path_cxt *pc, int *h, int *c, int *t, int *l); +char *sysfs_blkdev_scsi_host_strdup_attribute(struct path_cxt *pc, + const char *type, const char *attr); +int sysfs_blkdev_scsi_host_is(struct path_cxt *pc, const char *type); +int sysfs_blkdev_scsi_has_attribute(struct path_cxt *pc, const char *attr); +int sysfs_blkdev_scsi_path_contains(struct path_cxt *pc, const char *pattern); + +char *sysfs_chrdev_devno_to_devname(dev_t devno, char *buf, size_t bufsiz); + +enum sysfs_byteorder { + SYSFS_BYTEORDER_LITTLE, + SYSFS_BYTEORDER_BIG, +}; + +extern enum sysfs_byteorder sysfs_get_byteorder(struct path_cxt *pc); +extern int sysfs_get_address_bits(struct path_cxt *pc); + +#endif /* UTIL_LINUX_SYSFS_H */ |