Thinking over Jeff's comments I have done the following to make it easier to
read/review and cleanup:
- removed the now unneeded field that Jeff noted
- reordered the fields in the two mid structures so it is clear what is common
- put the 7 common fields in the two structures are at the beginning (if we want
to move to a common base mid substructure e.g.)
- next put the 7 or 8 fields which differ or are protocol unique and used now
- moved to the end, and commented out temporarily (#if 0) until they are used,
the mid fields relating to:
a) handling "async" interim responses from the server to smb2 requests
b) compound multi part operations (smb2 command chaining)
c) those for Pavel's asynchronous smb2_writepages (and Jeremy's readpages)
diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index d69e1e6..ce378ed 100644
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -591,20 +591,20 @@ typedef void (mid_callback_t)(struct mid_q_entry *mid);
/* one of these for every pending CIFS request to the server */
struct mid_q_entry {
struct list_head qhead; /* mids waiting on reply from this server */
- __u16 mid; /* multiplex id */
- __u16 pid; /* process id */
__u32 sequence_number; /* for CIFS signing */
+ int midState; /* wish this were enum but can not pass to wait_event */
unsigned long when_alloc; /* when mid was created */
#ifdef CONFIG_CIFS_STATS2
unsigned long when_sent; /* time when smb send finished */
unsigned long when_received; /* when demux complete (taken off wire) */
#endif
+ bool largeBuf:1; /* if valid response, is pointer to large buf */
mid_callback_t *callback; /* call completion callback */
void *callback_data; /* general purpose pointer for callback */
+ __u16 mid; /* multiplex id */
+ __u8 command; /* smb command code */
+ __u16 pid; /* process id */
struct smb_hdr *resp_buf; /* response buffer */
- int midState; /* wish this were enum but can not pass to wait_event */
- __u8 command; /* smb command code */
- bool largeBuf:1; /* if valid response, is pointer to large buf */
bool multiRsp:1; /* multiple trans2 responses for one request */
bool multiEnd:1; /* both received */
};
diff --git a/fs/cifs/smb2glob.h b/fs/cifs/smb2glob.h
index 66c01db..909cf39 100644
--- a/fs/cifs/smb2glob.h
+++ b/fs/cifs/smb2glob.h
@@ -160,29 +160,37 @@ struct page_req {
struct mid_q_entry *midq; /* queue structure for demultiplex */
};
+struct smb2_mid_entry;
+
+typedef void (smb2_mid_callback_t)(struct smb2_mid_entry *mid);
+
/* one of these for every pending SMB2 request to the server */
struct smb2_mid_entry {
struct list_head qhead; /* mids waiting on reply from this server */
- __u64 mid; /* multiplex id(s) */
- __u16 pid; /* process id */
__u32 sequence_number; /* for signing */ /* BB check if needed */
+ int mid_state; /* wish this were enum but can not pass to wait_event */
unsigned long when_alloc; /* when mid was created */
#ifdef CONFIG_CIFS_STATS2
unsigned long when_sent; /* time when smb send finished */
unsigned long when_received; /* when demux complete (taken off wire) */
#endif
- struct task_struct *tsk; /* task waiting for response */
+ bool large_buf:1; /* if valid response, is pointer to large buf */
+ smb2_mid_callback_t *callback;
+ void *callback_data;
+ __u64 mid; /* multiplex id(s), bigger for smb2 */
+ __le16 command; /* smb2 command code */
+ pid_t pid; /* process id - bigger for smb2 than cifs */
struct smb2_hdr *resp_buf; /* response buffer */
+
+ /* Additional fields below needed for handling async smb2 responses
+ and for asynchronous smb2_writepages support have been temporarily
+ removed from the port and will be reenabled as that gets merged in */
+
+#if 0 /* Fields needed for smb2_writepages, compound ops, async support */
char **pagebuf_list; /* response buffer */
int num_pages;
- int mid_state; /* wish this were enum but can not pass to wait_event */
- __le16 command; /* smb command code */
bool async_resp_rcvd:1; /* if server has responded with interim resp */
- bool large_buf:1; /* if valid response, is pointer to large buf */
bool is_kmap_buf:1;
-/* bool multi_rsp:1; BB do we have to account for something in SMB2 like
- we saw multiple trans2 responses for one request (possible in CIFS) */
- /* Async things */
__u64 *mid_list; /* multiplex id(s) */
int *mid_state_list;
short int *large_buf_list;
@@ -196,8 +204,7 @@ struct smb2_mid_entry {
bool complex_mid:1; /* complex entry - consists of several messages */
int result;
unsigned long last_rsp_time;
- int (*callback)(struct smb2_mid_entry * , void *);
- void *callback_data;
+#endif
};
This makes the mids looks as follows. For cifs:
struct mid_q_entry {
struct list_head qhead; /* mids waiting on reply from this server */
__u32 sequence_number; /* for CIFS signing */
int midState; /* wish this were enum but can not pass to wait_event */
unsigned long when_alloc; /* when mid was created */
#ifdef CONFIG_CIFS_STATS2
unsigned long when_sent; /* time when smb send finished */
unsigned long when_received; /* when demux complete (taken off wire) */
#endif
bool largeBuf:1; /* if valid response, is pointer to large buf */
mid_callback_t *callback; /* call completion callback */
void *callback_data; /* general purpose pointer for callback */
__u16 mid; /* multiplex id */
__u8 command; /* smb command code */
__u16 pid; /* process id */
struct smb_hdr *resp_buf; /* response buffer */
bool multiRsp:1; /* multiple trans2 responses for one request */
bool multiEnd:1; /* both received */
};
and for smb2 it should be easier to read now:
/* one of these for every pending SMB2 request to the server */
struct smb2_mid_entry {
struct list_head qhead; /* mids waiting on reply from this server */
__u32 sequence_number; /* for signing */ /* BB check if needed */
int mid_state; /* wish this were enum but can not pass to wait_event */
unsigned long when_alloc; /* when mid was created */
#ifdef CONFIG_CIFS_STATS2
unsigned long when_sent; /* time when smb send finished */
unsigned long when_received; /* when demux complete (taken off wire) */
#endif
bool large_buf:1; /* if valid response, is pointer to large buf */
smb2_mid_callback_t *callback;
void *callback_data;
__u64 mid; /* multiplex id(s), bigger for smb2 */
__le16 command; /* smb2 command code */
pid_t pid; /* process id - bigger for smb2 than cifs */
struct smb2_hdr *resp_buf; /* response buffer */
/* Additional fields below needed for handling async smb2 responses
and for asynchronous smb2_writepages support have been temporarily
removed from the port and will be reenabled as that gets merged in */
#if 0 /* Fields needed for smb2_writepages, compound ops, async support */
char **pagebuf_list; /* response buffer */
int num_pages;
bool async_resp_rcvd:1; /* if server has responded with interim resp */
bool is_kmap_buf:1;
__u64 *mid_list; /* multiplex id(s) */
int *mid_state_list;
short int *large_buf_list;
unsigned int num_mid;
unsigned int act_num_mid;
unsigned int num_received;
unsigned int cur_id;
struct smb2_hdr **resp_buf_list; /* response buffer */
__le16 *command_list;
bool async:1;
bool complex_mid:1; /* complex entry - consists of several messages */
int result;
unsigned long last_rsp_time;
#endif
};
--
Thanks,
Steve
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