[PATCH v3 0/6] FAT file renaming

[Daniel Venzin]

This patch series represents a continuation of version 2 [1],
incorporating tests and improvements.

[1] https://lore.kernel.org/u-boot/20250203211719.GX1233568@bill-the-cat/

Changes in v3:
- Abort the rename if the destination is a path instead of a file
- Add fatrnfile command for renaming files in a FAT file system
- Verify FAT file rename functionality with unit tests

Changes in v2:
- Adapt variable names for better consistency
- Add missing rename hooks
- Use EFI_ACCESS_DENIED for unsuccessful renames
- Avoid using of "== 0"
- Move the call to set_blk_dev earlier in the sequence
- Refactor delete_dentry_long for improved reusability
- Separate the rename implementation from changes in the filesystem layer
- Eliminate code duplication with delete_dentry_long(..)
- Ensure that the source file exists, but not the destination file
- Free the fatbuf if it has been reinitialized with fat_itr_root
- Delete orphaned FAT entry after copying file metadata

Daniel Venzin (6):
  fs: Add unimplemented rename hook to FS layer
  efi_loader: Support for file renaming
  fs: fat: Refactor delete_dentry_long interface
  fs: fat: Support basic file rename
  cmd: fat: Add fatrnfile command
  test/py: fs: Add fstest/rnfile test

 cmd/fat.c                            |  13 +++
 fs/fat/fat_write.c                   | 149 +++++++++++++++++++++++++--
 fs/fs.c                              |  50 +++++++++
 include/fat.h                        |   1 +
 include/fs.h                         |  11 ++
 lib/efi_loader/efi_file.c            |  11 +-
 test/py/tests/test_fs/conftest.py    |  75 ++++++++++++++
 test/py/tests/test_fs/test_rnfile.py |  93 +++++++++++++++++
 8 files changed, 392 insertions(+), 11 deletions(-)
 create mode 100644 test/py/tests/test_fs/test_rnfile.py

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2.39.5