include/sysfs.h

   1 /*
   2  * Copyright (C) 2011 Karel Zak <kzak@redhat.com>
   3  */
   4 #ifndef UTIL_LINUX_SYSFS_H
   5 #define UTIL_LINUX_SYSFS_H
   6
   7
   8 #include <stdio.h>
   9 #include <stdlib.h>
  10 #include <unistd.h>
  11 #include <stdint.h>
  12 #include <sys/types.h>
  13 #include <sys/stat.h>
  14 #include <fcntl.h>
  15 #include <string.h>
  16 #include <inttypes.h>
  17 #include <dirent.h>
  18
  19 #include "path.h"
  20
  21 /**
  22  * sysfs_devname_sys_to_dev:
  23  * @name: devname to be converted in place
  24  *
  25  * Linux kernel linux/drivers/base/core.c: device_get_devnode()
  26  * defines a replacement of '!' in the /sys device name by '/' in the
  27  * /dev device name. This helper replaces all occurrences of '!' in
  28  * @name by '/' to convert from /sys to /dev.
  29  */
  30 static inline void sysfs_devname_sys_to_dev(char *name)
  31 {
  32         char *c;
  33
  34         if (name)
  35                 while ((c = strchr(name, '!')))
  36                         c[0] = '/';
  37 }
  38
  39 /**
  40  * sysfs_devname_dev_to_sys:
  41  * @name: devname to be converted in place
  42  *
  43  * See sysfs_devname_sys_to_dev().
  44  */
  45 static inline void sysfs_devname_dev_to_sys(char *name)
  46 {
  47         char *c;
  48
  49         if (name)
  50                 while ((c = strchr(name, '/')))
  51                         c[0] = '!';
  52 }
  53
  54 struct sysfs_blkdev {
  55         dev_t   devno;
  56         struct path_cxt *parent;
  57
  58         unsigned int    scsi_host,
  59                         scsi_channel,
  60                         scsi_target,
  61                         scsi_lun;
  62
  63         unsigned int    has_hctl   : 1,
  64                         hctl_error : 1 ;
  65 };
  66
  67 void ul_sysfs_init_debug(void);
  68
  69 struct path_cxt *ul_new_sysfs_path(dev_t devno, struct path_cxt *parent, const char *prefix);
  70 int sysfs_blkdev_init_path(struct path_cxt *pc, dev_t devno, struct path_cxt *parent);
  71
  72 int sysfs_blkdev_set_parent(struct path_cxt *pc, struct path_cxt *parent);
  73 struct path_cxt *sysfs_blkdev_get_parent(struct path_cxt *pc);
  74
  75 char *sysfs_blkdev_get_name(struct path_cxt *pc, char *buf, size_t bufsiz);
  76 int sysfs_blkdev_is_partition_dirent(DIR *dir, struct dirent *d, const char *parent_name);
  77 int sysfs_blkdev_count_partitions(struct path_cxt *pc, const char *devname);
  78 dev_t sysfs_blkdev_partno_to_devno(struct path_cxt *pc, int partno);
  79 char *sysfs_blkdev_get_slave(struct path_cxt *pc);
  80 char *sysfs_blkdev_get_path(struct path_cxt *pc, char *buf, size_t bufsiz);
  81 dev_t sysfs_blkdev_get_devno(struct path_cxt *pc);
  82
  83 char *sysfs_blkdev_get_devchain(struct path_cxt *pc, char *buf, size_t bufsz);
  84 int sysfs_blkdev_next_subsystem(struct path_cxt *pc __attribute__((unused)), char *devchain, char **subsys);
  85
  86 int sysfs_blkdev_is_hotpluggable(struct path_cxt *pc);
  87 int sysfs_blkdev_get_wholedisk( struct path_cxt *pc,
  88                                 char *diskname,
  89                                 size_t len,
  90                                 dev_t *diskdevno);
  91
  92 int sysfs_devno_to_wholedisk(dev_t dev, char *diskname,
  93                              size_t len, dev_t *diskdevno);
  94 int sysfs_devno_is_dm_private(dev_t devno, char **uuid);
  95 int sysfs_devno_is_wholedisk(dev_t devno);
  96 dev_t sysfs_devname_to_devno(const char *name);
  97 dev_t __sysfs_devname_to_devno(const char *prefix, const char *name, const char *parent);
  98 char *sysfs_devno_to_devpath(dev_t devno, char *buf, size_t bufsiz);
  99 char *sysfs_devno_to_devname(dev_t devno, char *buf, size_t bufsiz);
 100 int sysfs_devno_count_partitions(dev_t devno);
 101
 102 int sysfs_blkdev_scsi_get_hctl(struct path_cxt *pc, int *h, int *c, int *t, int *l);
 103 char *sysfs_blkdev_scsi_host_strdup_attribute(struct path_cxt *pc,
 104                         const char *type, const char *attr);
 105 int sysfs_blkdev_scsi_host_is(struct path_cxt *pc, const char *type);
 106 int sysfs_blkdev_scsi_has_attribute(struct path_cxt *pc, const char *attr);
 107 int sysfs_blkdev_scsi_path_contains(struct path_cxt *pc, const char *pattern);
 108
 109
 110 #endif /* UTIL_LINUX_SYSFS_H */