b45cae614c
Add file.c which provides file operations for ext4l filesystem. Changes needed for file.c support: - Add i_writecount and i_rwsem fields to struct inode - Add IOMAP_DIO_* flags to linux/iomap.h - Add vm_operations_struct definition - Add VM flags (VM_SHARED, VM_HUGEPAGE, etc.) - Add vm_area_desc and pipe_inode_info structures - Add FMODE_* flags and SEEK_HOLE/SEEK_DATA to linux/fs.h - Add vfsmount, path structs and f_path to struct file - Add inode_trylock*, lockdep_assert_held_write macros - Add filemap_fault, filemap_map_pages stubs - Add inode_operations struct definition - Add various stubs: d_path, fscrypt_file_open, fsverity_file_open, dquot_file_open, sb_start_intwrite_trylock, ext4_listxattr Simplify ext4_file_operations and ext4_file_inode_operations initializers to use only the members defined in U-Boot's structs. Co-developed-by: Claude <noreply@anthropic.com> Signed-off-by: Simon Glass <simon.glass@canonical.com>
109 lines
2.6 KiB
C
109 lines
2.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef LINUX_IOMAP_H
|
|
#define LINUX_IOMAP_H
|
|
|
|
#include <linux/types.h>
|
|
|
|
struct bio;
|
|
struct dax_device;
|
|
struct inode;
|
|
struct iomap_iter;
|
|
struct kiocb;
|
|
struct iov_iter;
|
|
struct vm_fault;
|
|
|
|
/* iomap type values */
|
|
#define IOMAP_HOLE 0
|
|
#define IOMAP_DELALLOC 1
|
|
#define IOMAP_MAPPED 2
|
|
#define IOMAP_UNWRITTEN 3
|
|
#define IOMAP_INLINE 4
|
|
|
|
/* iomap flags */
|
|
#define IOMAP_F_NEW (1U << 0)
|
|
#define IOMAP_F_DIRTY (1U << 1)
|
|
#define IOMAP_F_SHARED (1U << 2)
|
|
#define IOMAP_F_MERGED (1U << 3)
|
|
#define IOMAP_F_BUFFER_HEAD (1U << 4)
|
|
#define IOMAP_F_ZONE_APPEND (1U << 5)
|
|
#define IOMAP_F_PRIVATE (1U << 12)
|
|
|
|
/* Flags for iomap_begin */
|
|
#define IOMAP_WRITE (1 << 0)
|
|
#define IOMAP_ZERO (1 << 1)
|
|
#define IOMAP_REPORT (1 << 2)
|
|
#define IOMAP_FAULT (1 << 3)
|
|
#define IOMAP_DIRECT (1 << 4)
|
|
#define IOMAP_NOWAIT (1 << 5)
|
|
#define IOMAP_OVERWRITE_ONLY (1 << 6)
|
|
#define IOMAP_UNSHARE (1 << 7)
|
|
#define IOMAP_DAX (1 << 8)
|
|
#define IOMAP_ATOMIC (1 << 9)
|
|
|
|
/* IOMAP_NULL_ADDR indicates a hole/unwritten block address */
|
|
#define IOMAP_NULL_ADDR ((u64)-1)
|
|
|
|
/* Additional iomap flags */
|
|
#define IOMAP_F_ATOMIC_BIO (1U << 6)
|
|
|
|
/* iomap DIO end_io flags */
|
|
#define IOMAP_DIO_UNWRITTEN (1 << 0)
|
|
#define IOMAP_DIO_COW (1 << 1)
|
|
|
|
/* iomap_dio_rw flags */
|
|
#define IOMAP_DIO_FORCE_WAIT (1 << 0)
|
|
#define IOMAP_DIO_OVERWRITE_ONLY (1 << 1)
|
|
|
|
struct iomap {
|
|
u64 addr;
|
|
loff_t offset;
|
|
u64 length;
|
|
u16 type;
|
|
u16 flags;
|
|
struct block_device *bdev;
|
|
struct dax_device *dax_dev;
|
|
void *inline_data;
|
|
};
|
|
|
|
struct iomap_ops {
|
|
int (*iomap_begin)(struct inode *inode, loff_t pos, loff_t length,
|
|
unsigned int flags, struct iomap *iomap,
|
|
struct iomap *srcmap);
|
|
int (*iomap_end)(struct inode *inode, loff_t pos, loff_t length,
|
|
ssize_t written, unsigned int flags,
|
|
struct iomap *iomap);
|
|
};
|
|
|
|
struct iomap_dio_ops {
|
|
int (*end_io)(struct kiocb *iocb, ssize_t size, int error,
|
|
unsigned int flags);
|
|
void (*submit_io)(const struct iomap_iter *iter, struct bio *bio,
|
|
loff_t file_offset);
|
|
struct bio_set *bio_set;
|
|
};
|
|
|
|
struct iomap_iter;
|
|
|
|
/* Stubs for U-Boot - these are not actually used in read-only mode */
|
|
static inline ssize_t
|
|
iomap_dio_rw(struct kiocb *iocb, struct iov_iter *iter,
|
|
const struct iomap_ops *ops, const struct iomap_dio_ops *dops,
|
|
unsigned int dio_flags, void *private, size_t done_before)
|
|
{
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
static inline loff_t
|
|
iomap_seek_hole(struct inode *inode, loff_t pos, const struct iomap_ops *ops)
|
|
{
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
static inline loff_t
|
|
iomap_seek_data(struct inode *inode, loff_t pos, const struct iomap_ops *ops)
|
|
{
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
#endif /* LINUX_IOMAP_H */
|