kernel/git/stable/linux.git/fs/ntfs/reparse.c, branch master

ntfs: propagate reparse index insertion failure

2026-08-26T11:15:34+00:00

update_reparse_data() ignores the return value of set_reparse_index(). When index insertion fails, the code removes the just-written reparse data as cleanup but still returns 0, so symlink(2) (and WSL special file creation) reports success while no reparse data exists on disk. When there was no previous reparse data (oldsize == 0), the failure was likewise silently ignored. Propagate the error to the caller. Fixes: fc053f05ca28 ("ntfs: add reparse and ea operations") Signed-off-by: Baolin Liu Reviewed-by: Hyunchul Lee Signed-off-by: Namjae Jeon

ntfs: return DT_UNKNOWN on inode lookup failure in readdir

2026-08-26T10:56:33+00:00

ntfs_reparse_tag_dt_types() returns PTR_ERR(vi) when ntfs_iget() fails, but its return type is unsigned int and the caller passes the value straight to dir_emit() as d_type. A stale or corrupt MFT reference in a directory index thus makes readdir report a garbage d_type value to userspace. Return DT_UNKNOWN on lookup failure instead. Fixes: fc053f05ca28 ("ntfs: add reparse and ea operations") Signed-off-by: Baolin Liu Reviewed-by: Hyunchul Lee Signed-off-by: Namjae Jeon

ntfs: add non-resident WOF decompression

2026-08-21T10:08:57+00:00

Introduce non-resident Windows System Compression (WOF) decompression support. Add wof.c containing parse_wof_chunk_table() and ntfs_read_wof_compressed_block(), and routing them via transparent codec ops table with dynamic scratch memory allocation. Hook up ntfs_readpage/read_folio paths in aops.c to delegate to the WOF block reader when NInoWofCompressed is set. Signed-off-by: Hyunchul Lee Signed-off-by: Namjae Jeon

ntfs: parse REPARSE_TAG_WOF

2026-08-21T10:06:38+00:00

Introduce parsing support for REPARSE_TAG_WOF reparse points. Rename ntfs_make_symlink() to ntfs_parse_reparse() since it now handles both symlinks and WOF reparse tags. Introduce NI_WofCompressed flag to indicate files compressed via Windows System Compression (WOF), and configure compressed block size accordingly (12 to 15 bits based on the format). Signed-off-by: Hyunchul Lee Signed-off-by: Namjae Jeon

ntfs: return errors from ntfs_attr_readall

2026-08-21T10:06:36+00:00

ntfs_attr_readall() currently loses the failure reason for attribute lookup, allocation, and read failures by returning NULL. Return ERR_PTR() with the original error instead. The reparse parser can then propagate allocation and I/O errors without treating them as filesystem corruption. Signed-off-by: Hyunchul Lee Signed-off-by: Namjae Jeon

ntfs: simplify ntfs_reparse_set_native_symlink()

2026-08-19T09:16:46+00:00

Avoid redundant 'strlen()' and use the convenient 'strreplace()' to simplify 'ntfs_reparse_set_native_symlink()'. Signed-off-by: Dmitry Antipov Signed-off-by: Namjae Jeon

ntfs: reparse: remove redundant NULL checks before kvfree()

2026-08-19T09:16:38+00:00

kvfree() safely handles NULL pointers, so the explicit NULL checks before calling kvfree() are unnecessary. This issue was reported by ifnullfree.cocci. Signed-off-by: Mohammad Shahid Reviewed-by: Hyunchul Lee Signed-off-by: Namjae Jeon

ntfs: support creating Windows native symlinks

2026-06-15T10:39:43+00:00

And introduce the symlink= mount option to configure how symbolic links are created. The option accepts "wsl" or "native", with "wsl" being the default. Signed-off-by: Hyunchul Lee Signed-off-by: Namjae Jeon

ntfs: clean up target name conversion for WSL symlinks

2026-06-15T10:39:41+00:00

WSL symlink target names are stored as narrow NLS/UTF-8 strings on disk. Converting the target name to Unicode in ntfs_symlink and converting it back to NLS in ntfs_reparse_set_wsl_symlink is redundant. Remove this conversion and pass the symname directly to the reparse data setter. Signed-off-by: Hyunchul Lee Signed-off-by: Namjae Jeon

ntfs: support following Windows native symlink with absolute paths

2026-06-15T10:39:37+00:00

Extend reparse-point handling beyond relative symlinks so NTFS can expose the Windows absolute forms used by non-relative symbolic links and junctions. * Store the reparse tag and symlink flags in the inode. * Validate junction payloads, and parse targets from substitute_name. * Add function to rewrite supported Windows absolute path into Linux path relative to the mounted NTFS volume. Signed-off-by: Hyunchul Lee Signed-off-by: Namjae Jeon