Merge branch 'mpi-master' into wip-k-fmlpwip-k-fmlp

Conflicts:
	litmus/sched_cedf.c

3 files changed, 91 insertions, 19 deletions

diff --git a/include/net/9p/9p.h b/include/net/9p/9p.h
index a8de812ccbc8..008711e8e78f 100644
--- a/include/net/9p/9p.h
+++ b/include/net/9p/9p.h
@@ -86,6 +86,8 @@ do { \
 
 /**
  * enum p9_msg_t - 9P message types
+ * @P9_TLERROR: not used
+ * @P9_RLERROR: response for any failed request for 9P2000.L
  * @P9_TSTATFS: file system status request
  * @P9_RSTATFS: file system status response
  * @P9_TSYMLINK: make symlink request
@@ -117,7 +119,7 @@ do { \
  * @P9_TREAD: request to transfer data from a file or directory
  * @P9_RREAD: response with data requested
  * @P9_TWRITE: reuqest to transfer data to a file
- * @P9_RWRITE: response with out much data was transfered to file
+ * @P9_RWRITE: response with out much data was transferred to file
  * @P9_TCLUNK: forget about a handle to an entity within the file system
  * @P9_RCLUNK: response when server has forgotten about the handle
  * @P9_TREMOVE: request to remove an entity from the hierarchy
@@ -137,6 +139,8 @@ do { \
  */
 
 enum p9_msg_t {
+        P9_TLERROR = 6,
+        P9_RLERROR,
         P9_TSTATFS = 8,
         P9_RSTATFS,
         P9_TLOPEN = 12,
@@ -149,6 +153,8 @@ enum p9_msg_t {
         P9_RMKNOD,
         P9_TRENAME = 20,
         P9_RRENAME,
+        P9_TREADLINK = 22,
+        P9_RREADLINK,
         P9_TGETATTR = 24,
         P9_RGETATTR,
         P9_TSETATTR = 26,
@@ -159,6 +165,12 @@ enum p9_msg_t {
         P9_RXATTRCREATE,
         P9_TREADDIR = 40,
         P9_RREADDIR,
+        P9_TFSYNC = 50,
+        P9_RFSYNC,
+        P9_TLOCK = 52,
+        P9_RLOCK,
+        P9_TGETLOCK = 54,
+        P9_RGETLOCK,
         P9_TLINK = 70,
         P9_RLINK,
         P9_TMKDIR = 72,
@@ -229,10 +241,10 @@ enum p9_open_mode_t {
 
 /**
  * enum p9_perm_t - 9P permissions
- * @P9_DMDIR: mode bite for directories
+ * @P9_DMDIR: mode bit for directories
  * @P9_DMAPPEND: mode bit for is append-only
  * @P9_DMEXCL: mode bit for excluse use (only one open handle allowed)
- * @P9_DMMOUNT: mode bite for mount points
+ * @P9_DMMOUNT: mode bit for mount points
  * @P9_DMAUTH: mode bit for authentication file
  * @P9_DMTMP: mode bit for non-backed-up files
  * @P9_DMSYMLINK: mode bit for symbolic links (9P2000.u)
@@ -280,7 +292,7 @@ enum p9_perm_t {
  *
  * QID types are a subset of permissions - they are primarily
  * used to differentiate semantics for a file system entity via
- * a jump-table.  Their value is also the most signifigant 16 bits
+ * a jump-table.  Their value is also the most significant 16 bits
  * of the permission_t
  *
  * See Also: http://plan9.bell-labs.com/magic/man2html/2/stat
@@ -350,10 +362,10 @@ struct p9_qid {
 };
 
 /**
- * struct p9_stat - file system metadata information
+ * struct p9_wstat - file system metadata information
  * @size: length prefix for this stat structure instance
- * @type: the type of the server (equivilent to a major number)
- * @dev: the sub-type of the server (equivilent to a minor number)
+ * @type: the type of the server (equivalent to a major number)
+ * @dev: the sub-type of the server (equivalent to a minor number)
  * @qid: unique id from the server of type &p9_qid
  * @mode: Plan 9 format permissions of type &p9_perm_t
  * @atime: Last access/read time
@@ -458,6 +470,48 @@ struct p9_iattr_dotl {
         u64 mtime_nsec;
 };
 
+#define P9_LOCK_SUCCESS 0
+#define P9_LOCK_BLOCKED 1
+#define P9_LOCK_ERROR 2
+#define P9_LOCK_GRACE 3
+
+#define P9_LOCK_FLAGS_BLOCK 1
+#define P9_LOCK_FLAGS_RECLAIM 2
+
+/* struct p9_flock: POSIX lock structure
+ * @type - type of lock
+ * @flags - lock flags
+ * @start - starting offset of the lock
+ * @length - number of bytes
+ * @proc_id - process id which wants to take lock
+ * @client_id - client id
+ */
+
+struct p9_flock {
+        u8 type;
+        u32 flags;
+        u64 start;
+        u64 length;
+        u32 proc_id;
+        char *client_id;
+};
+
+/* struct p9_getlock: getlock structure
+ * @type - type of lock
+ * @start - starting offset of the lock
+ * @length - number of bytes
+ * @proc_id - process id which wants to take lock
+ * @client_id - client id
+ */
+
+struct p9_getlock {
+        u8 type;
+        u64 start;
+        u64 length;
+        u32 proc_id;
+        char *client_id;
+};
+
 /* Structures for Protocol Operations */
 struct p9_tstatfs {
         u32 fid;
@@ -633,8 +687,12 @@ struct p9_rwstat {
  * @size: prefixed length of the structure
  * @id: protocol operating identifier of type &p9_msg_t
  * @tag: transaction id of the request
- * @offset: used by marshalling routines to track currentposition in buffer
- * @capacity: used by marshalling routines to track total capacity
+ * @offset: used by marshalling routines to track current position in buffer
+ * @capacity: used by marshalling routines to track total malloc'd capacity
+ * @pubuf: Payload user buffer given by the caller
+ * @pkbuf: Payload kernel buffer given by the caller
+ * @pbuf_size: pubuf/pkbuf(only one will be !NULL) size to be read/write.
+ * @private: For transport layer's use.
  * @sdata: payload
  *
  * &p9_fcall represents the structure for all 9P RPC
@@ -651,8 +709,12 @@ struct p9_fcall {
 
         size_t offset;
         size_t capacity;
+        char __user *pubuf;
+        char *pkbuf;
+        size_t pbuf_size;
+        void *private;
 
-        uint8_t *sdata;
+        u8 *sdata;
 };
 
 struct p9_idpool;
@@ -666,7 +728,6 @@ void p9_idpool_put(int id, struct p9_idpool *p);
 int p9_idpool_check(int id, struct p9_idpool *p);
 
 int p9_error_init(void);
-int p9_errstr2errno(char *, int);
 int p9_trans_fd_init(void);
 void p9_trans_fd_exit(void);
 #endif /* NET_9P_H */
diff --git a/include/net/9p/client.h b/include/net/9p/client.h
index d1aa2cfb30f0..d26d5e98a173 100644
--- a/include/net/9p/client.h
+++ b/include/net/9p/client.h
@@ -60,7 +60,7 @@ enum p9_trans_status {
 };
 
 /**
- * enum p9_req_status_t - virtio request status
+ * enum p9_req_status_t - status of a request
  * @REQ_STATUS_IDLE: request slot unused
  * @REQ_STATUS_ALLOC: request has been allocated but not sent
  * @REQ_STATUS_UNSENT: request waiting to be sent
@@ -101,7 +101,7 @@ enum p9_req_status_t {
  * Transport use an array to track outstanding requests
  * instead of a list.  While this may incurr overhead during initial
  * allocation or expansion, it makes request lookup much easier as the
- * tag id is a index into an array.  (We use tag+1 so that we can accomodate
+ * tag id is a index into an array.  (We use tag+1 so that we can accommodate
  * the -1 tag for the T_VERSION request).
  * This also has the nice effect of only having to allocate wait_queues
  * once, instead of constantly allocating and freeing them.  Its possible
@@ -212,17 +212,14 @@ struct p9_dirent {
 
 int p9_client_statfs(struct p9_fid *fid, struct p9_rstatfs *sb);
 int p9_client_rename(struct p9_fid *fid, struct p9_fid *newdirfid, char *name);
-int p9_client_version(struct p9_client *);
 struct p9_client *p9_client_create(const char *dev_name, char *options);
 void p9_client_destroy(struct p9_client *clnt);
 void p9_client_disconnect(struct p9_client *clnt);
 void p9_client_begin_disconnect(struct p9_client *clnt);
 struct p9_fid *p9_client_attach(struct p9_client *clnt, struct p9_fid *afid,
                                         char *uname, u32 n_uname, char *aname);
-struct p9_fid *p9_client_auth(struct p9_client *clnt, char *uname,
-                                                u32 n_uname, char *aname);
-struct p9_fid *p9_client_walk(struct p9_fid *oldfid, int nwname, char **wnames,
-                                                                int clone);
+struct p9_fid *p9_client_walk(struct p9_fid *oldfid, uint16_t nwname,
+                char **wnames, int clone);
 int p9_client_open(struct p9_fid *fid, int mode);
 int p9_client_fcreate(struct p9_fid *fid, char *name, u32 perm, int mode,
                                                         char *extension);
@@ -232,6 +229,7 @@ int p9_client_symlink(struct p9_fid *fid, char *name, char *symname, gid_t gid,
 int p9_client_create_dotl(struct p9_fid *ofid, char *name, u32 flags, u32 mode,
                 gid_t gid, struct p9_qid *qid);
 int p9_client_clunk(struct p9_fid *fid);
+int p9_client_fsync(struct p9_fid *fid, int datasync);
 int p9_client_remove(struct p9_fid *fid);
 int p9_client_read(struct p9_fid *fid, char *data, char __user *udata,
                                                         u64 offset, u32 count);
@@ -251,6 +249,8 @@ int p9_client_mknod_dotl(struct p9_fid *oldfid, char *name, int mode,
                         dev_t rdev, gid_t gid, struct p9_qid *);
 int p9_client_mkdir_dotl(struct p9_fid *fid, char *name, int mode,
                                 gid_t gid, struct p9_qid *);
+int p9_client_lock_dotl(struct p9_fid *fid, struct p9_flock *flock, u8 *status);
+int p9_client_getlock_dotl(struct p9_fid *fid, struct p9_getlock *fl);
 struct p9_req_t *p9_tag_lookup(struct p9_client *, u16);
 void p9_client_cb(struct p9_client *c, struct p9_req_t *req);
 
@@ -262,5 +262,6 @@ int p9_is_proto_dotu(struct p9_client *clnt);
 int p9_is_proto_dotl(struct p9_client *clnt);
 struct p9_fid *p9_client_xattrwalk(struct p9_fid *, const char *, u64 *);
 int p9_client_xattrcreate(struct p9_fid *, const char *, u64, int);
+int p9_client_readlink(struct p9_fid *fid, char **target);
 
 #endif /* NET_9P_CLIENT_H */
diff --git a/include/net/9p/transport.h b/include/net/9p/transport.h
index 6d5886efb102..d8549fb9c742 100644
--- a/include/net/9p/transport.h
+++ b/include/net/9p/transport.h
@@ -26,13 +26,22 @@
 #ifndef NET_9P_TRANSPORT_H
 #define NET_9P_TRANSPORT_H
 
+#define P9_TRANS_PREF_PAYLOAD_MASK 0x1
+
+/* Default. Add Payload to PDU before sending it down to transport layer */
+#define P9_TRANS_PREF_PAYLOAD_DEF  0x0
+/* Send pay load separately to transport layer along with PDU.*/
+#define P9_TRANS_PREF_PAYLOAD_SEP  0x1
+
 /**
  * struct p9_trans_module - transport module interface
  * @list: used to maintain a list of currently available transports
  * @name: the human-readable name of the transport
  * @maxsize: transport provided maximum packet size
+ * @pref: Preferences of this transport
  * @def: set if this transport should be considered the default
  * @create: member function to create a new connection on this transport
+ * @close: member function to discard a connection on this transport
  * @request: member function to issue a request to the transport
  * @cancel: member function to cancel a request (if it hasn't been sent)
  *
@@ -40,13 +49,14 @@
  * transport module with the 9P core network module and used by the client
  * to instantiate a new connection on a transport.
  *
- * BUGS: the transport module list isn't protected.
+ * The transport module list is protected by v9fs_trans_lock.
  */
 
 struct p9_trans_module {
         struct list_head list;
         char *name;             /* name of transport */
         int maxsize;            /* max message size of transport */
+        int pref;               /* Preferences of this transport */
         int def;                /* this transport should be default */
         struct module *owner;
         int (*create)(struct p9_client *, const char *, char *);