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Diffstat (limited to 'fs/cifs/smb2ops.c')
-rw-r--r--fs/cifs/smb2ops.c185
1 files changed, 175 insertions, 10 deletions
diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
index c571be8cb76..787844bde38 100644
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -182,11 +182,8 @@ smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
/* start with specified wsize, or default */
wsize = volume_info->wsize ? volume_info->wsize : CIFS_DEFAULT_IOSIZE;
wsize = min_t(unsigned int, wsize, server->max_write);
- /*
- * limit write size to 2 ** 16, because we don't support multicredit
- * requests now.
- */
- wsize = min_t(unsigned int, wsize, 2 << 15);
+ /* set it to the maximum buffer size value we can send with 1 credit */
+ wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
return wsize;
}
@@ -200,11 +197,8 @@ smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
/* start with specified rsize, or default */
rsize = volume_info->rsize ? volume_info->rsize : CIFS_DEFAULT_IOSIZE;
rsize = min_t(unsigned int, rsize, server->max_read);
- /*
- * limit write size to 2 ** 16, because we don't support multicredit
- * requests now.
- */
- rsize = min_t(unsigned int, rsize, 2 << 15);
+ /* set it to the maximum buffer size value we can send with 1 credit */
+ rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
return rsize;
}
@@ -494,6 +488,157 @@ smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
}
static int
+SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
+ u64 persistent_fid, u64 volatile_fid,
+ struct copychunk_ioctl *pcchunk)
+{
+ int rc;
+ unsigned int ret_data_len;
+ struct resume_key_req *res_key;
+
+ rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
+ FSCTL_SRV_REQUEST_RESUME_KEY, true /* is_fsctl */,
+ NULL, 0 /* no input */,
+ (char **)&res_key, &ret_data_len);
+
+ if (rc) {
+ cifs_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
+ goto req_res_key_exit;
+ }
+ if (ret_data_len < sizeof(struct resume_key_req)) {
+ cifs_dbg(VFS, "Invalid refcopy resume key length\n");
+ rc = -EINVAL;
+ goto req_res_key_exit;
+ }
+ memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
+
+req_res_key_exit:
+ kfree(res_key);
+ return rc;
+}
+
+static int
+smb2_clone_range(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;
+ struct copychunk_ioctl *pcchunk;
+ struct copychunk_ioctl_rsp *retbuf = NULL;
+ struct cifs_tcon *tcon;
+ int chunks_copied = 0;
+ bool chunk_sizes_updated = false;
+
+ pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
+
+ if (pcchunk == NULL)
+ return -ENOMEM;
+
+ cifs_dbg(FYI, "in smb2_clone_range - about to call request res key\n");
+ /* Request a key from the server to identify the source of the copy */
+ rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
+ srcfile->fid.persistent_fid,
+ srcfile->fid.volatile_fid, pcchunk);
+
+ /* Note: request_res_key sets res_key null only if rc !=0 */
+ if (rc)
+ goto cchunk_out;
+
+ /* For now array only one chunk long, will make more flexible later */
+ pcchunk->ChunkCount = __constant_cpu_to_le32(1);
+ pcchunk->Reserved = 0;
+ pcchunk->Reserved2 = 0;
+
+ tcon = tlink_tcon(trgtfile->tlink);
+
+ while (len > 0) {
+ pcchunk->SourceOffset = cpu_to_le64(src_off);
+ pcchunk->TargetOffset = cpu_to_le64(dest_off);
+ pcchunk->Length =
+ cpu_to_le32(min_t(u32, len, tcon->max_bytes_chunk));
+
+ /* Request server copy to target from src identified by key */
+ rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
+ trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
+ true /* is_fsctl */, (char *)pcchunk,
+ sizeof(struct copychunk_ioctl), (char **)&retbuf,
+ &ret_data_len);
+ if (rc == 0) {
+ if (ret_data_len !=
+ sizeof(struct copychunk_ioctl_rsp)) {
+ cifs_dbg(VFS, "invalid cchunk response size\n");
+ rc = -EIO;
+ goto cchunk_out;
+ }
+ if (retbuf->TotalBytesWritten == 0) {
+ cifs_dbg(FYI, "no bytes copied\n");
+ rc = -EIO;
+ goto cchunk_out;
+ }
+ /*
+ * Check if server claimed to write more than we asked
+ */
+ if (le32_to_cpu(retbuf->TotalBytesWritten) >
+ le32_to_cpu(pcchunk->Length)) {
+ cifs_dbg(VFS, "invalid copy chunk response\n");
+ rc = -EIO;
+ goto cchunk_out;
+ }
+ if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
+ cifs_dbg(VFS, "invalid num chunks written\n");
+ rc = -EIO;
+ goto cchunk_out;
+ }
+ chunks_copied++;
+
+ src_off += le32_to_cpu(retbuf->TotalBytesWritten);
+ dest_off += le32_to_cpu(retbuf->TotalBytesWritten);
+ len -= le32_to_cpu(retbuf->TotalBytesWritten);
+
+ cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %d\n",
+ le32_to_cpu(retbuf->ChunksWritten),
+ le32_to_cpu(retbuf->ChunkBytesWritten),
+ le32_to_cpu(retbuf->TotalBytesWritten));
+ } else if (rc == -EINVAL) {
+ if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
+ goto cchunk_out;
+
+ cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
+ le32_to_cpu(retbuf->ChunksWritten),
+ le32_to_cpu(retbuf->ChunkBytesWritten),
+ le32_to_cpu(retbuf->TotalBytesWritten));
+
+ /*
+ * Check if this is the first request using these sizes,
+ * (ie check if copy succeed once with original sizes
+ * and check if the server gave us different sizes after
+ * we already updated max sizes on previous request).
+ * if not then why is the server returning an error now
+ */
+ if ((chunks_copied != 0) || chunk_sizes_updated)
+ goto cchunk_out;
+
+ /* Check that server is not asking us to grow size */
+ if (le32_to_cpu(retbuf->ChunkBytesWritten) <
+ tcon->max_bytes_chunk)
+ tcon->max_bytes_chunk =
+ le32_to_cpu(retbuf->ChunkBytesWritten);
+ else
+ goto cchunk_out; /* server gave us bogus size */
+
+ /* No need to change MaxChunks since already set to 1 */
+ chunk_sizes_updated = true;
+ }
+ }
+
+cchunk_out:
+ kfree(pcchunk);
+ return rc;
+}
+
+static int
smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
struct cifs_fid *fid)
{
@@ -760,6 +905,17 @@ smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
}
static void
+smb2_downgrade_oplock(struct TCP_Server_Info *server,
+ struct cifsInodeInfo *cinode, bool set_level2)
+{
+ if (set_level2)
+ server->ops->set_oplock_level(cinode, SMB2_OPLOCK_LEVEL_II,
+ 0, NULL);
+ else
+ server->ops->set_oplock_level(cinode, 0, 0, NULL);
+}
+
+static void
smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
unsigned int epoch, bool *purge_cache)
{
@@ -891,6 +1047,7 @@ smb2_create_lease_buf(u8 *lease_key, u8 oplock)
buf->ccontext.NameOffset = cpu_to_le16(offsetof
(struct create_lease, Name));
buf->ccontext.NameLength = cpu_to_le16(4);
+ /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
buf->Name[0] = 'R';
buf->Name[1] = 'q';
buf->Name[2] = 'L';
@@ -917,6 +1074,7 @@ smb3_create_lease_buf(u8 *lease_key, u8 oplock)
buf->ccontext.NameOffset = cpu_to_le16(offsetof
(struct create_lease_v2, Name));
buf->ccontext.NameLength = cpu_to_le16(4);
+ /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
buf->Name[0] = 'R';
buf->Name[1] = 'q';
buf->Name[2] = 'L';
@@ -965,6 +1123,7 @@ struct smb_version_operations smb20_operations = {
.clear_stats = smb2_clear_stats,
.print_stats = smb2_print_stats,
.is_oplock_break = smb2_is_valid_oplock_break,
+ .downgrade_oplock = smb2_downgrade_oplock,
.need_neg = smb2_need_neg,
.negotiate = smb2_negotiate,
.negotiate_wsize = smb2_negotiate_wsize,
@@ -1017,6 +1176,7 @@ struct smb_version_operations smb20_operations = {
.set_oplock_level = smb2_set_oplock_level,
.create_lease_buf = smb2_create_lease_buf,
.parse_lease_buf = smb2_parse_lease_buf,
+ .clone_range = smb2_clone_range,
};
struct smb_version_operations smb21_operations = {
@@ -1038,6 +1198,7 @@ struct smb_version_operations smb21_operations = {
.clear_stats = smb2_clear_stats,
.print_stats = smb2_print_stats,
.is_oplock_break = smb2_is_valid_oplock_break,
+ .downgrade_oplock = smb2_downgrade_oplock,
.need_neg = smb2_need_neg,
.negotiate = smb2_negotiate,
.negotiate_wsize = smb2_negotiate_wsize,
@@ -1090,6 +1251,7 @@ struct smb_version_operations smb21_operations = {
.set_oplock_level = smb21_set_oplock_level,
.create_lease_buf = smb2_create_lease_buf,
.parse_lease_buf = smb2_parse_lease_buf,
+ .clone_range = smb2_clone_range,
};
struct smb_version_operations smb30_operations = {
@@ -1112,6 +1274,7 @@ struct smb_version_operations smb30_operations = {
.print_stats = smb2_print_stats,
.dump_share_caps = smb2_dump_share_caps,
.is_oplock_break = smb2_is_valid_oplock_break,
+ .downgrade_oplock = smb2_downgrade_oplock,
.need_neg = smb2_need_neg,
.negotiate = smb2_negotiate,
.negotiate_wsize = smb2_negotiate_wsize,
@@ -1165,6 +1328,8 @@ struct smb_version_operations smb30_operations = {
.set_oplock_level = smb3_set_oplock_level,
.create_lease_buf = smb3_create_lease_buf,
.parse_lease_buf = smb3_parse_lease_buf,
+ .clone_range = smb2_clone_range,
+ .validate_negotiate = smb3_validate_negotiate,
};
struct smb_version_values smb20_values = {
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-16 18:57:08 +0000