kernel/git/stable/linux.git/fs/smb/common, branch linux-7.2.y

smb: compress: reject Pattern_V1 when not negotiated

2026-08-03T16:21:22+00:00

Pattern_V1 is an optional chained payload type selected during SMB 3.1.1 compression negotiate. conn->compress_pattern was only consulted when building responses, so a peer that negotiated LZ77 with chained support could still submit Pattern payloads on the receive path. Pass allow_pattern through smb_compression_decompress() and reject SMB3_COMPRESS_PATTERN in the chained decoder when it is false. Link: https://github.com/namjaejeon/ksmbd/issues/529 Fixes: a08de24c2b85 ("ksmbd: negotiate and decode SMB2 compression") Signed-off-by: Anatolii Shumak Reviewed-by: ChenXiaoSong Acked-by: Namjae Jeon Signed-off-by: Steve French

smb/client: refresh allocation after EOF-extending fallocate

2026-07-13T15:37:55+00:00

Before this change, xfstests generic/496 was not supported on ksmbd: generic/496 ... [not run] fallocated swap not supported here ksmbd handles SetEOF as truncate, so EOF extension alone does not allocate backing blocks. A fallocated swapfile can therefore still look sparse to swapon. Request allocation for EOF-extending fallocate ranges that can be represented by FILE_ALLOCATION_INFORMATION, and refresh the allocation state afterwards. With this change, xfstests generic/496 and generic/701 pass on ksmbd. However, Samba "strict allocate = no" now exposes the real generic/701 failure: the old pass came from inflated local i_blocks, not from server allocation. generic/213 also fails in that case because an oversized allocation request may not return ENOSPC. Signed-off-by: Huiwen He Reviewed-by: ChenXiaoSong Signed-off-by: Steve French

smb common: add missing AAPL defines

2026-06-24T15:33:51+00:00

Add various defines for AAPL open context, e.g. for queries of server capabilities. Signed-off-by: Steve French

smb: add common SMB2 compression transform helpers

2026-06-16T23:57:21+00:00

Implement common validation, compression and decompression for SMB2 compression transforms. Support unchained LZ77 and chained NONE, LZ77 and Pattern_V1 payloads. Signed-off-by: Namjae Jeon Signed-off-by: Steve French

smb: move LZ77 compression into common code

2026-06-16T23:57:21+00:00

Move the LZ77 codec in cifs.ko to smb/common/ so both the SMB client and ksmbd can use it. Signed-off-by: Namjae Jeon Signed-off-by: Steve French

smb/server: implement FSCTL_SET_COMPRESSION ioctl handler

2026-06-16T23:57:21+00:00

Example: 1. client: smbinfo setcompression no /mnt/file 2. client: smbinfo getcompression /mnt/file Compression: 0 (NONE) 3. client: smbinfo setcompression lznt1 /mnt/file 4. client: smbinfo getcompression /mnt/file Compression: 2 (LZNT1) 5. client: smbinfo setcompression default /mnt/file 6. client: smbinfo getcompression /mnt/file Compression: 2 (LZNT1) Signed-off-by: ChenXiaoSong Acked-by: Namjae Jeon Signed-off-by: Steve French

smb/server: implement FSCTL_GET_COMPRESSION ioctl handler

2026-06-16T23:57:21+00:00

Example: 1. server: chattr +c /export/file 2. client: smbinfo getcompression /mnt/file Compression: 2 (LZNT1) Signed-off-by: ChenXiaoSong Acked-by: Namjae Jeon Signed-off-by: Steve French

smb: move compression definitions into common/fscc.h

2026-06-16T23:57:21+00:00

These definitions will also be used by ksmbd, move them into common header file. Signed-off-by: ChenXiaoSong Acked-by: Namjae Jeon Signed-off-by: Steve French

smb: remove duplicate server/smbfsctl.h

2026-06-16T23:57:21+00:00

Rename the following places: - FSCTL_COPYCHUNK -> FSCTL_SRV_COPYCHUNK - FSCTL_COPYCHUNK_WRITE -> FSCTL_SRV_COPYCHUNK_WRITE - FSCTL_REQUEST_RESUME_KEY -> FSCTL_SRV_REQUEST_RESUME_KEY server/smbfsctl.h contains the following additional definitions compared to common/smbfsctl.h: - IO_REPARSE_TAG_LX_SYMLINK_LE - IO_REPARSE_TAG_AF_UNIX_LE - IO_REPARSE_TAG_LX_FIFO_LE - IO_REPARSE_TAG_LX_CHR_LE - IO_REPARSE_TAG_LX_BLK_LE Signed-off-by: ChenXiaoSong Acked-by: Namjae Jeon Signed-off-by: Steve French

SMB3.1.1: add missing QUERY_DIR info levels

2026-05-12T15:13:24+00:00

New Infolevels for QUERY_DIR (and QUERY_INFO) levels 78 through 81 are now being used by Windows clients and were added to the documentation. Add defines for them (and correct some typos in documentation). See MS-SMB2 2.2.33 and MS-FSCC 2.4 Signed-off-by: Steve French