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linux/fs/smb/client
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Huiwen He d7d2adcd02 smb/client: flush dirty data before punching a hole 
Punching a hole after a large buffered write may leave the range
reported as data. Reproduce it with:

  xfs_io -f \
    -c "pwrite -b 3m -S 0x61 0 3m" \
    -c "fpunch 1m 1m" \
    -c "seek -h 0" \
    -c "seek -d 1m" \
    /mnt/test/repro

Punching 1 MiB at offset 1 MiB should produce:

  0          1 MiB       2 MiB       3 MiB
  |  DATA    |   HOLE    |   DATA    | EOF

Instead, the entire file is reported as data. SEEK_HOLE(0) returns EOF,
and SEEK_DATA(1M) returns 1M.

This happens because a dirty folio spanning the punched range can be
written back after the punch and refill the hole.

Fix this by flushing and waiting for dirty data in the punched range
before invalidating the page cache and issuing FSCTL_SET_ZERO_DATA.

The xfstests generic/539 pass against Samba/ksmbd with this change.

Signed-off-by: Huiwen He <hehuiwen@kylinos.cn>
Reviewed-by: ChenXiaoSong <chenxiaosong@kylinos.cn>
Signed-off-by: Steve French <stfrench@microsoft.com>
2026-07-14 21:51:52 -05:00
..
.gitignore smb/client: autogenerate SMB1 DOS/SRV to POSIX error mapping 2026-04-05 19:58:40 -05:00
asn1.c
cached_dir.c cifs: abort open_cached_dir if we don't request leases 2026-05-03 21:06:02 -05:00
cached_dir.h smb: client: fix (remove) drop_dir_cache module parameter 2026-04-22 09:54:21 -05:00
cifs_debug.c smb: client: fix (remove) drop_dir_cache module parameter 2026-04-22 09:54:21 -05:00
cifs_debug.h cifs: SMB1 split: cifs_debug.c 2026-02-08 17:07:45 -06:00
cifs_fs_sb.h smb: client: fix busy dentry warning on unmount after DIO 2026-07-08 18:44:42 -05:00
cifs_ioctl.h smb: client: use atomic_t for mnt_cifs_flags 2026-02-26 18:17:08 -06:00
cifs_spnego_negtokeninit.asn1
cifs_spnego.c smb: client: reject userspace cifs.spnego descriptions 2026-05-19 10:43:05 -05:00
cifs_spnego.h cifs: Scripted clean up fs/smb/client/cifs_spnego.h 2026-02-08 17:07:44 -06:00
cifs_swn.c smb: client: resolve SWN tcon from live registrations 2026-06-14 15:12:23 -05:00
cifs_swn.h cifs: Scripted clean up fs/smb/client/cifs_swn.h 2026-02-08 17:07:44 -06:00
cifs_unicode.c smb: client: Remove obsolete cmac(aes) allocation 2026-04-22 09:56:10 -05:00
cifs_unicode.h smb: client: use atomic_t for mnt_cifs_flags 2026-02-26 18:17:08 -06:00
cifsacl.c smb: client: mask server-provided mode to 07777 in modefromsid 2026-07-09 12:25:16 -05:00
cifsacl.h
cifsencrypt.c smb: client: Remove obsolete cmac(aes) allocation 2026-04-22 09:56:10 -05:00
cifsfs.c smb/client: refresh allocation size after duplicate extents 2026-07-13 10:37:54 -05:00
cifsfs.h cifs: update internal module version number 2026-07-01 20:19:21 -05:00
cifsglob.h smb/client: fix incorrect nlink returned by fstat() 2026-07-09 07:55:55 -05:00
cifspdu.h cifs: SMB1 split: Move BCC access functions 2026-02-08 17:07:45 -06:00
cifsproto.h cifs: Show reason why autodisabling serverino support 2026-07-09 08:03:19 -05:00
cifsroot.c
cifssmb.c cifs: Remove CIFSSMBSetPathInfoFB() fallback function 2026-07-09 18:24:30 -05:00
compress.c smb: move LZ77 compression into common code 2026-06-16 18:57:21 -05:00
compress.h smb: move LZ77 compression into common code 2026-06-16 18:57:21 -05:00
connect.c cifs: Show reason why autodisabling serverino support 2026-07-09 08:03:19 -05:00
dfs_cache.c cifs: Show reason why autodisabling serverino support 2026-07-09 08:03:19 -05:00
dfs_cache.h cifs: Scripted clean up fs/smb/client/dfs_cache.h 2026-02-08 17:07:44 -06:00
dfs.c
dfs.h Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
dir.c openat2: new OPENAT2_REGULAR flag support 2026-05-21 15:33:47 +02:00
dns_resolve.c
dns_resolve.h cifs: Scripted clean up fs/smb/client/dns_resolve.h 2026-02-08 17:07:44 -06:00
export.c
file.c smb: client: fix busy dentry warning on unmount after DIO 2026-07-08 18:44:42 -05:00
fs_context.c 14 smb3 client fixes 2026-06-18 09:18:00 -07:00
fs_context.h smb: client: allow both 'lease' and 'nolease' mount options 2026-04-13 09:14:54 -05:00
fscache.c
fscache.h cifs: SMB1 split: Separate out SMB1 decls into smb1proto.h 2026-02-08 17:07:45 -06:00
gen_smb1_mapping smb/client: autogenerate SMB1 DOS/SRV to POSIX error mapping 2026-04-05 19:58:40 -05:00
gen_smb2_mapping cifs: Autogenerate SMB2 error mapping table 2026-02-08 21:23:53 -06:00
inode.c cifs: Show reason why autodisabling serverino support 2026-07-09 08:03:19 -05:00
ioctl.c smb/client: allow FS_IOC_SETFLAGS to clear compression 2026-06-14 15:12:23 -05:00
Kconfig 18 ksmbd server fixes 2026-04-23 17:04:18 -07:00
link.c smb/client: zero-initialize stack-allocated cifs_open_info_data 2026-07-09 07:55:55 -05:00
Makefile smb: move LZ77 compression into common code 2026-06-16 18:57:21 -05:00
misc.c cifs: Show reason why autodisabling serverino support 2026-07-09 08:03:19 -05:00
namespace.c cifs: Implement fileattr_get for case sensitivity 2026-05-11 16:50:29 +02:00
netlink.c smb: client: require net admin for CIFS SWN netlink 2026-05-21 11:15:17 -05:00
netlink.h cifs: Scripted clean up fs/smb/client/netlink.h 2026-02-08 17:07:44 -06:00
netmisc.c cifs: SMB1 split: netmisc.c 2026-02-08 17:07:45 -06:00
nterr.h smb/client: replace nt_errs with ntstatus_to_dos_map 2026-04-05 19:58:40 -05:00
ntlmssp.h cifs: Scripted clean up fs/smb/client/ntlmssp.h 2026-02-08 17:07:45 -06:00
readdir.c cifs: Show reason why autodisabling serverino support 2026-07-09 08:03:19 -05:00
reparse.c smb: client: preserve leading slash for POSIX absolute symlink targets 2026-07-06 07:59:14 -05:00
reparse.h smb: client: use atomic_t for mnt_cifs_flags 2026-02-26 18:17:08 -06:00
rfc1002pdu.h smb: fix some warnings reported by scripts/checkpatch.pl 2025-11-30 21:11:45 -06:00
sess.c smb: client: Remove obsolete cmac(aes) allocation 2026-04-22 09:56:10 -05:00
smb1debug.c cifs: SMB1 split: cifs_debug.c 2026-02-08 17:07:45 -06:00
smb1encrypt.c smb: client: Compare MACs in constant time 2026-03-03 20:56:36 -06:00
smb1maperror_test.c smb/client: Use EXPORT_SYMBOL_IF_KUNIT() to export symbols 2026-07-14 21:48:00 -05:00
smb1maperror.c smb/client: Use EXPORT_SYMBOL_IF_KUNIT() to export symbols 2026-07-14 21:48:00 -05:00
smb1misc.c cifs: SMB1 split: netmisc.c 2026-02-08 17:07:45 -06:00
smb1ops.c cifs: Fix and improve cifs_is_path_accessible() function 2026-07-09 18:19:54 -05:00
smb1pdu.h smb: move compression definitions into common/fscc.h 2026-06-16 18:57:21 -05:00
smb1proto.h smb/client: allow FS_IOC_SETFLAGS to clear compression 2026-06-14 15:12:23 -05:00
smb1session.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
smb1transport.c cifs: smb1: fix comment typo 2026-03-16 21:12:40 -05:00
smb2file.c smb/client: pass cifs_open_info_data to SMB2_open() 2026-07-09 07:55:55 -05:00
smb2glob.h smb/client: make SMB2 maperror KUnit tests a separate module 2026-03-01 17:59:52 -06:00
smb2inode.c smb/client: fix out-of-bounds read in smb2_compound_op() 2026-05-07 14:09:32 -05:00
smb2maperror_test.c smb/client: Use EXPORT_SYMBOL_IF_KUNIT() to export symbols in SMB2 2026-07-14 21:51:19 -05:00
smb2maperror.c smb/client: Use EXPORT_SYMBOL_IF_KUNIT() to export symbols in SMB2 2026-07-14 21:51:19 -05:00
smb2misc.c smb: client: reject overlapping data areas in SMB2 responses 2026-07-13 10:37:55 -05:00
smb2ops.c smb/client: flush dirty data before punching a hole 2026-07-14 21:51:52 -05:00
smb2pdu.c smb/client: refresh allocation after EOF-extending fallocate 2026-07-13 10:37:55 -05:00
smb2pdu.h smb: move compression definitions into common/fscc.h 2026-06-16 18:57:21 -05:00
smb2proto.h smb/client: refresh allocation after EOF-extending fallocate 2026-07-13 10:37:55 -05:00
smb2transport.c smb: client: protect tc_count increment in smb2_find_smb_sess_tcon_unlocked() 2026-05-19 10:35:12 -05:00
smbdirect.c smb: smbdirect: introduce and use include/linux/smbdirect.h 2026-05-01 16:24:25 -05:00
smbdirect.h smb: smbdirect: introduce and use include/linux/smbdirect.h 2026-05-01 16:24:25 -05:00
smbencrypt.c cifs: SMB1 split: Adjust #includes 2026-02-08 17:07:45 -06:00
smberr.h smb/client: introduce KUnit tests to check DOS/SRV err mapping search 2026-04-05 19:58:40 -05:00
trace.c smb: client: Add tracepoint for krb5 auth 2025-12-05 17:40:42 -06:00
trace.h smb: client: resolve SWN tcon from live registrations 2026-06-14 15:12:23 -05:00
transport.c smb: client: avoid integer overflow in SMB2 READ length check 2026-05-14 10:55:28 -05:00
unc.c
winucase.c
xattr.c smb/client: clean up a type issue in cifs_xattr_get() 2026-06-14 15:12:24 -05:00