Update checkpoint.c includes to use ext4_uboot.h compatibility layer.
Add jbd2/Makefile and include jbd2 in the build via fs/Makefile
Add necessary stubs and definitions:
- JBD2 trace stubs (trace_jbd2_checkpoint, etc.)
- mutex_lock_io, write_dirty_buffer, spin_needbreak stubs
- bd_dev field to struct block_device
- Temporary JBD2 function stubs until other jbd2 files are added
Co-developed-by: Claude Opus 4.5 <noreply@anthropic.com>
Signed-off-by: Simon Glass <simon.glass@canonical.com>
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>
Add extents.c (extent handling) to the build and provide stubs.
Changes to extents.c:
- Replace Linux includes with ext4_uboot.h
Changes to ext4_uboot.h:
- Add __GFP_MOVABLE, __GFP_FS memory allocation flags
- Add FIEMAP_EXTENT_* flags for fiemap operations
- Add FALLOC_FL_* flags for fallocate operations
- Add O_SYNC flag and struct file with f_mapping
- Add struct iomap and iomap_ops for I/O mapping
- Add IOMAP_* type constants
- Add struct fiemap_extent_info and FIEMAP_FLAG_* constants
- Add i_blkbits member to inode struct
Co-developed-by: Claude Opus 4.5 <noreply@anthropic.com>
Signed-off-by: Simon Glass <simon.glass@canonical.com>
Add stub headers to support ext4l filesystem compilation:
New headers:
- bit_spinlock.h: bit-based spinlock stubs
- blkdev.h: block device structures and operations
- buffer_head.h: buffer head management with state functions
- crc32c.h: CRC32C checksum stub
- fs.h: filesystem structures (super_block, inode operations)
- journal-head.h: journal buffer head structure
- mutex.h: mutex stubs
Updates to existing headers:
- compat.h: add rcu_head callback structure
- jbd2.h: add wait.h and init.h includes for types
- sched.h: add current task stub
- workqueue.h: fix flush_work macro warning
These provide the minimal Linux kernel interfaces needed for
ext4 code to compile in U-Boot's single-threaded environment.
Co-developed-by: Claude Opus 4.5 <noreply@anthropic.com>
Signed-off-by: Simon Glass <simon.glass@canonical.com>
