diff options
Diffstat (limited to 'include/linux/blkdev.h')
| -rw-r--r-- | include/linux/blkdev.h | 49 |
1 files changed, 23 insertions, 26 deletions
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 7d378ab2..39143117 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -6,6 +6,8 @@ #include <linux/kobject.h> #include <linux/types.h> +#define MAX_LFS_FILESIZE ((loff_t)LLONG_MAX) + #define BIO_MAX_VECS 256U typedef unsigned fmode_t; @@ -21,30 +23,20 @@ struct user_namespace; #define MINOR(dev) ((unsigned int) ((dev) & MINORMASK)) #define MKDEV(ma,mi) (((ma) << MINORBITS) | (mi)) -/* file is open for reading */ -#define FMODE_READ ((__force fmode_t)0x1) -/* file is open for writing */ -#define FMODE_WRITE ((__force fmode_t)0x2) -/* file is seekable */ -#define FMODE_LSEEK ((__force fmode_t)0x4) -/* file can be accessed using pread */ -#define FMODE_PREAD ((__force fmode_t)0x8) -/* file can be accessed using pwrite */ -#define FMODE_PWRITE ((__force fmode_t)0x10) -/* File is opened for execution with sys_execve / sys_uselib */ -#define FMODE_EXEC ((__force fmode_t)0x20) -/* File is opened with O_NDELAY (only set for block devices) */ -#define FMODE_NDELAY ((__force fmode_t)0x40) -/* File is opened with O_EXCL (only set for block devices) */ -#define FMODE_EXCL ((__force fmode_t)0x80) -/* File is opened using open(.., 3, ..) and is writeable only for ioctls - (specialy hack for floppy.c) */ -#define FMODE_WRITE_IOCTL ((__force fmode_t)0x100) -/* 32bit hashes as llseek() offset (for directories) */ -#define FMODE_32BITHASH ((__force fmode_t)0x200) -/* 64bit hashes as llseek() offset (for directories) */ -#define FMODE_64BITHASH ((__force fmode_t)0x400) -#define FMODE_BUFFERED ((__force fmode_t)0x800) +typedef unsigned int __bitwise blk_mode_t; + +/* open for reading */ +#define BLK_OPEN_READ ((__force blk_mode_t)(1 << 0)) +/* open for writing */ +#define BLK_OPEN_WRITE ((__force blk_mode_t)(1 << 1)) +/* open exclusively (vs other exclusive openers */ +#define BLK_OPEN_EXCL ((__force blk_mode_t)(1 << 2)) +/* opened with O_NDELAY */ +#define BLK_OPEN_NDELAY ((__force blk_mode_t)(1 << 3)) +/* open for "writes" only for ioctls (specialy hack for floppy.c) */ +#define BLK_OPEN_WRITE_IOCTL ((__force blk_mode_t)(1 << 4)) + +#define BLK_OPEN_BUFFERED ((__force blk_mode_t)(1 << 5)) struct inode { unsigned long i_ino; @@ -93,9 +85,14 @@ int blkdev_issue_zeroout(struct block_device *, sector_t, sector_t, gfp_t, unsig unsigned bdev_logical_block_size(struct block_device *bdev); sector_t get_capacity(struct gendisk *disk); -void blkdev_put(struct block_device *bdev, fmode_t mode); +struct blk_holder_ops { + void (*mark_dead)(struct block_device *bdev); +}; + +void blkdev_put(struct block_device *bdev, void *holder); void bdput(struct block_device *bdev); -struct block_device *blkdev_get_by_path(const char *path, fmode_t mode, void *holder); +struct block_device *blkdev_get_by_path(const char *path, blk_mode_t mode, + void *holder, const struct blk_holder_ops *hop); int lookup_bdev(const char *path, dev_t *); struct super_block { |