diff options
Diffstat (limited to 'fs/cifs/smb2ops.c')
| -rw-r--r-- | fs/cifs/smb2ops.c | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c index c7d228c4006a..b1e9c0f1b24c 100644 --- a/fs/cifs/smb2ops.c +++ b/fs/cifs/smb2ops.c @@ -806,6 +806,53 @@ smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon, cfile->fid.volatile_fid, cfile->pid, &eof, false); } +#ifdef CONFIG_CIFS_SMB311 +static int +smb2_duplicate_extents(const unsigned int xid, + struct cifsFileInfo *srcfile, + struct cifsFileInfo *trgtfile, u64 src_off, + u64 len, u64 dest_off) +{ + int rc; + unsigned int ret_data_len; + char *retbuf = NULL; + struct duplicate_extents_to_file dup_ext_buf; + struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink); + + /* server fileays advertise duplicate extent support with this flag */ + if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) & + FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0) + return -EOPNOTSUPP; + + dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid; + dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid; + dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off); + dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off); + dup_ext_buf.ByteCount = cpu_to_le64(len); + cifs_dbg(FYI, "duplicate extents: src off %lld dst off %lld len %lld", + src_off, dest_off, len); + + rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false); + if (rc) + goto duplicate_extents_out; + + rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid, + trgtfile->fid.volatile_fid, + FSCTL_DUPLICATE_EXTENTS_TO_FILE, + true /* is_fsctl */, (char *)&dup_ext_buf, + sizeof(struct duplicate_extents_to_file), + (char **)&retbuf, + &ret_data_len); + + if (ret_data_len > 0) + cifs_dbg(FYI, "non-zero response length in duplicate extents"); + +duplicate_extents_out: + return rc; +} +#endif /* CONFIG_CIFS_SMB311 */ + + static int smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon, struct cifsFileInfo *cfile) @@ -1714,6 +1761,7 @@ struct smb_version_operations smb311_operations = { .create_lease_buf = smb3_create_lease_buf, .parse_lease_buf = smb3_parse_lease_buf, .clone_range = smb2_clone_range, + .duplicate_extents = smb2_duplicate_extents, /* .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */ .wp_retry_size = smb2_wp_retry_size, .dir_needs_close = smb2_dir_needs_close, |