diff options
Diffstat (limited to 'libblkid/loopdev.h')
| -rw-r--r-- | libblkid/loopdev.h | 192 |
1 files changed, 0 insertions, 192 deletions
diff --git a/libblkid/loopdev.h b/libblkid/loopdev.h deleted file mode 100644 index 6efa0c78f..000000000 --- a/libblkid/loopdev.h +++ /dev/null @@ -1,192 +0,0 @@ -#ifndef UTIL_LINUX_LOOPDEV_H -#define UTIL_LINUX_LOOPDEV_H - -#include "sysfs.h" - -/* - * loop_info.lo_encrypt_type - */ -#define LO_CRYPT_NONE 0 -#define LO_CRYPT_XOR 1 -#define LO_CRYPT_DES 2 -#define LO_CRYPT_CRYPTOAPI 18 - -#define LOOP_SET_FD 0x4C00 -#define LOOP_CLR_FD 0x4C01 -/* - * Obsolete (kernel < 2.6) - * - * #define LOOP_SET_STATUS 0x4C02 - * #define LOOP_GET_STATUS 0x4C03 - */ -#define LOOP_SET_STATUS64 0x4C04 -#define LOOP_GET_STATUS64 0x4C05 -/* #define LOOP_CHANGE_FD 0x4C06 */ -#define LOOP_SET_CAPACITY 0x4C07 - -/* /dev/loop-control interface */ -#ifndef LOOP_CTL_ADD -# define LOOP_CTL_ADD 0x4C80 -# define LOOP_CTL_REMOVE 0x4C81 -# define LOOP_CTL_GET_FREE 0x4C82 -#endif - -/* - * loop_info.lo_flags - */ -enum { - LO_FLAGS_READ_ONLY = 1, - LO_FLAGS_USE_AOPS = 2, - LO_FLAGS_AUTOCLEAR = 4, /* kernel >= 2.6.25 */ - LO_FLAGS_PARTSCAN = 8, /* kernel >= 3.2 */ -}; - -#define LO_NAME_SIZE 64 -#define LO_KEY_SIZE 32 - -/* - * Linux LOOP_{SET,GET}_STATUS64 ioclt struct - */ -struct loop_info64 { - uint64_t lo_device; - uint64_t lo_inode; - uint64_t lo_rdevice; - uint64_t lo_offset; - uint64_t lo_sizelimit; /* bytes, 0 == max available */ - uint32_t lo_number; - uint32_t lo_encrypt_type; - uint32_t lo_encrypt_key_size; - uint32_t lo_flags; - uint8_t lo_file_name[LO_NAME_SIZE]; - uint8_t lo_crypt_name[LO_NAME_SIZE]; - uint8_t lo_encrypt_key[LO_KEY_SIZE]; - uint64_t lo_init[2]; -}; - -#define LOOPDEV_MAJOR 7 /* loop major number */ -#define LOOPDEV_DEFAULT_NNODES 8 /* default number of loop devices */ - -struct loopdev_iter { - FILE *proc; /* /proc/partitions */ - DIR *sysblock; /* /sys/block */ - int ncur; /* current position */ - int *minors; /* ary of minor numbers (when scan whole /dev) */ - int nminors; /* number of items in *minors */ - int ct_perm; /* count permission problems */ - int ct_succ; /* count number of detected devices */ - - unsigned int done:1; /* scanning done */ - unsigned int default_check:1;/* check first LOOPDEV_NLOOPS */ - int flags; /* LOOPITER_FL_* flags */ -}; - -enum { - LOOPITER_FL_FREE = (1 << 0), - LOOPITER_FL_USED = (1 << 1) -}; - -/* - * handler for work with loop devices - */ -struct loopdev_cxt { - char device[128]; /* device path (e.g. /dev/loop<N>) */ - char *filename; /* backing file for loopcxt_set_... */ - int fd; /* open(/dev/looo<N>) */ - int mode; /* fd mode O_{RDONLY,RDWR} */ - - int flags; /* LOOPDEV_FL_* flags */ - unsigned int has_info:1; /* .info contains data */ - unsigned int extra_check:1; /* unusual stuff for iterator */ - unsigned int debug:1; /* debug mode ON/OFF */ - unsigned int info_failed:1; /* LOOP_GET_STATUS ioctl failed */ - - struct sysfs_cxt sysfs; /* pointer to /sys/dev/block/<maj:min>/ */ - struct loop_info64 info; /* for GET/SET ioctl */ - struct loopdev_iter iter; /* scans /sys or /dev for used/free devices */ -}; - -#define UL_LOOPDEVCXT_EMPTY { .fd = -1, .sysfs = UL_SYSFSCXT_EMPTY } - -/* - * loopdev_cxt.flags - */ -enum { - LOOPDEV_FL_RDONLY = (1 << 0), /* open(/dev/loop) mode; default */ - LOOPDEV_FL_RDWR = (1 << 1), /* necessary for loop setup only */ - LOOPDEV_FL_OFFSET = (1 << 4), - LOOPDEV_FL_NOSYSFS = (1 << 5), - LOOPDEV_FL_NOIOCTL = (1 << 6), - LOOPDEV_FL_DEVSUBDIR = (1 << 7), - LOOPDEV_FL_CONTROL = (1 << 8), /* system with /dev/loop-control */ - LOOPDEV_FL_SIZELIMIT = (1 << 9) -}; - -/* - * High-level - */ -extern int loopmod_supports_partscan(void); - -extern int is_loopdev(const char *device); -extern int loopdev_is_autoclear(const char *device); - -extern char *loopdev_get_backing_file(const char *device); -extern int loopdev_is_used(const char *device, const char *filename, - uint64_t offset, int flags); -extern char *loopdev_find_by_backing_file(const char *filename, - uint64_t offset, int flags); -extern int loopcxt_find_unused(struct loopdev_cxt *lc); -extern int loopdev_delete(const char *device); -extern int loopdev_count_by_backing_file(const char *filename, char **loopdev); - -/* - * Low-level - */ -extern int loopcxt_init(struct loopdev_cxt *lc, int flags) - __attribute__ ((warn_unused_result)); -extern void loopcxt_deinit(struct loopdev_cxt *lc); -extern void loopcxt_enable_debug(struct loopdev_cxt *lc, int enable); - -extern int loopcxt_set_device(struct loopdev_cxt *lc, const char *device) - __attribute__ ((warn_unused_result)); -extern int loopcxt_has_device(struct loopdev_cxt *lc); -extern char *loopcxt_strdup_device(struct loopdev_cxt *lc); -extern const char *loopcxt_get_device(struct loopdev_cxt *lc); -extern struct sysfs_cxt *loopcxt_get_sysfs(struct loopdev_cxt *lc); -extern struct loop_info64 *loopcxt_get_info(struct loopdev_cxt *lc); - -extern int loopcxt_get_fd(struct loopdev_cxt *lc); -extern int loopcxt_set_fd(struct loopdev_cxt *lc, int fd, int mode); - -extern int loopcxt_init_iterator(struct loopdev_cxt *lc, int flags); -extern int loopcxt_deinit_iterator(struct loopdev_cxt *lc); -extern int loopcxt_next(struct loopdev_cxt *lc); - -extern int loopcxt_setup_device(struct loopdev_cxt *lc); -extern int loopcxt_delete_device(struct loopdev_cxt *lc); - -int loopcxt_set_offset(struct loopdev_cxt *lc, uint64_t offset); -int loopcxt_set_sizelimit(struct loopdev_cxt *lc, uint64_t sizelimit); -int loopcxt_set_flags(struct loopdev_cxt *lc, uint32_t flags); -int loopcxt_set_backing_file(struct loopdev_cxt *lc, const char *filename); - -extern char *loopcxt_get_backing_file(struct loopdev_cxt *lc); -extern int loopcxt_get_backing_devno(struct loopdev_cxt *lc, dev_t *devno); -extern int loopcxt_get_backing_inode(struct loopdev_cxt *lc, ino_t *ino); -extern int loopcxt_get_offset(struct loopdev_cxt *lc, uint64_t *offset); -extern int loopcxt_get_sizelimit(struct loopdev_cxt *lc, uint64_t *size); -extern int loopcxt_get_encrypt_type(struct loopdev_cxt *lc, uint32_t *type); -extern const char *loopcxt_get_crypt_name(struct loopdev_cxt *lc); -extern int loopcxt_is_autoclear(struct loopdev_cxt *lc); -extern int loopcxt_is_readonly(struct loopdev_cxt *lc); -extern int loopcxt_is_partscan(struct loopdev_cxt *lc); -extern int loopcxt_find_by_backing_file(struct loopdev_cxt *lc, - const char *filename, - uint64_t offset, int flags); - -extern int loopcxt_is_used(struct loopdev_cxt *lc, - struct stat *st, - const char *backing_file, - uint64_t offset, - int flags); - -#endif /* UTIL_LINUX_LOOPDEV_H */ |