#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;
+typedef __u32 __bitwise blk_opf_t;
struct bio;
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)
+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;
}
int blkdev_issue_discard(struct block_device *, sector_t, sector_t, gfp_t);
+int blkdev_issue_zeroout(struct block_device *, sector_t, sector_t, gfp_t, unsigned);
#define bdev_get_queue(bdev) (&((bdev)->queue))
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 {