nfs: disintegrate UAPI for nfs

This is to complete part of the Userspace API (UAPI) disintegration for which
the preparatory patches were pulled recently.  After these patches, userspace
headers will be segregated into:

        include/uapi/linux/.../foo.h

for the userspace interface stuff, and:

        include/linux/.../foo.h

for the strictly kernel internal stuff.

Signed-off-by: J. Bruce Fields <bfields@redhat.com>

1 files changed, 253 insertions, 15 deletions

diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index 977dc0e85ccb..f5af2527fc69 100644
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -32,6 +32,8 @@
 #include "smb2pdu.h"
 #endif
 
+#define CIFS_MAGIC_NUMBER 0xFF534D42      /* the first four bytes of SMB PDUs */
+
 /*
  * The sizes of various internal tables and strings
  */
@@ -128,8 +130,10 @@ struct sdesc {
 struct cifs_secmech {
 	struct crypto_shash *hmacmd5; /* hmac-md5 hash function */
 	struct crypto_shash *md5; /* md5 hash function */
+	struct crypto_shash *hmacsha256; /* hmac-sha256 hash function */
 	struct sdesc *sdeschmacmd5;  /* ctxt to generate ntlmv2 hash, CR1 */
 	struct sdesc *sdescmd5; /* ctxt to generate cifs/smb signature */
+	struct sdesc *sdeschmacsha256;  /* ctxt to generate smb2 signature */
 };
 
 /* per smb session structure/fields */
@@ -158,9 +162,24 @@ struct cifs_cred {
  *****************************************************************
  */
 
+/*
+ * A smb_rqst represents a complete request to be issued to a server. It's
+ * formed by a kvec array, followed by an array of pages. Page data is assumed
+ * to start at the beginning of the first page.
+ */
+struct smb_rqst {
+	struct kvec	*rq_iov;	/* array of kvecs */
+	unsigned int	rq_nvec;	/* number of kvecs in array */
+	struct page	**rq_pages;	/* pointer to array of page ptrs */
+	unsigned int	rq_npages;	/* number pages in array */
+	unsigned int	rq_pagesz;	/* page size to use */
+	unsigned int	rq_tailsz;	/* length of last page */
+};
+
 enum smb_version {
 	Smb_1 = 1,
 	Smb_21,
+	Smb_30,
 };
 
 struct mid_q_entry;
@@ -171,17 +190,23 @@ struct cifs_tcon;
 struct dfs_info3_param;
 struct cifs_fattr;
 struct smb_vol;
+struct cifs_fid;
+struct cifs_readdata;
+struct cifs_writedata;
+struct cifs_io_parms;
+struct cifs_search_info;
+struct cifsInodeInfo;
 
 struct smb_version_operations {
 	int (*send_cancel)(struct TCP_Server_Info *, void *,
 			   struct mid_q_entry *);
 	bool (*compare_fids)(struct cifsFileInfo *, struct cifsFileInfo *);
 	/* setup request: allocate mid, sign message */
-	int (*setup_request)(struct cifs_ses *, struct kvec *, unsigned int,
-			     struct mid_q_entry **);
+	struct mid_q_entry *(*setup_request)(struct cifs_ses *,
+						struct smb_rqst *);
 	/* setup async request: allocate mid, sign message */
-	int (*setup_async_request)(struct TCP_Server_Info *, struct kvec *,
-				   unsigned int, struct mid_q_entry **);
+	struct mid_q_entry *(*setup_async_request)(struct TCP_Server_Info *,
+						struct smb_rqst *);
 	/* check response: verify signature, map error */
 	int (*check_receive)(struct mid_q_entry *, struct TCP_Server_Info *,
 			     bool);
@@ -212,6 +237,10 @@ struct smb_version_operations {
 	bool (*need_neg)(struct TCP_Server_Info *);
 	/* negotiate to the server */
 	int (*negotiate)(const unsigned int, struct cifs_ses *);
+	/* set negotiated write size */
+	unsigned int (*negotiate_wsize)(struct cifs_tcon *, struct smb_vol *);
+	/* set negotiated read size */
+	unsigned int (*negotiate_rsize)(struct cifs_tcon *, struct smb_vol *);
 	/* setup smb sessionn */
 	int (*sess_setup)(const unsigned int, struct cifs_ses *,
 			  const struct nls_table *);
@@ -235,10 +264,22 @@ struct smb_version_operations {
 	int (*query_path_info)(const unsigned int, struct cifs_tcon *,
 			       struct cifs_sb_info *, const char *,
 			       FILE_ALL_INFO *, bool *);
+	/* query file data from the server */
+	int (*query_file_info)(const unsigned int, struct cifs_tcon *,
+			       struct cifs_fid *, FILE_ALL_INFO *);
 	/* get server index number */
 	int (*get_srv_inum)(const unsigned int, struct cifs_tcon *,
 			    struct cifs_sb_info *, const char *,
 			    u64 *uniqueid, FILE_ALL_INFO *);
+	/* set size by path */
+	int (*set_path_size)(const unsigned int, struct cifs_tcon *,
+			     const char *, __u64, struct cifs_sb_info *, bool);
+	/* set size by file handle */
+	int (*set_file_size)(const unsigned int, struct cifs_tcon *,
+			     struct cifsFileInfo *, __u64, bool);
+	/* set attributes */
+	int (*set_file_info)(struct inode *, const char *, FILE_BASIC_INFO *,
+			     const unsigned int);
 	/* build a full path to the root of the mount */
 	char * (*build_path_to_root)(struct smb_vol *, struct cifs_sb_info *,
 				     struct cifs_tcon *);
@@ -256,10 +297,84 @@ struct smb_version_operations {
 	/* remove directory */
 	int (*rmdir)(const unsigned int, struct cifs_tcon *, const char *,
 		     struct cifs_sb_info *);
+	/* unlink file */
+	int (*unlink)(const unsigned int, struct cifs_tcon *, const char *,
+		      struct cifs_sb_info *);
+	/* open, rename and delete file */
+	int (*rename_pending_delete)(const char *, struct dentry *,
+				     const unsigned int);
+	/* send rename request */
+	int (*rename)(const unsigned int, struct cifs_tcon *, const char *,
+		      const char *, struct cifs_sb_info *);
+	/* send create hardlink request */
+	int (*create_hardlink)(const unsigned int, struct cifs_tcon *,
+			       const char *, const char *,
+			       struct cifs_sb_info *);
+	/* open a file for non-posix mounts */
+	int (*open)(const unsigned int, struct cifs_tcon *, const char *, int,
+		    int, int, struct cifs_fid *, __u32 *, FILE_ALL_INFO *,
+		    struct cifs_sb_info *);
+	/* set fid protocol-specific info */
+	void (*set_fid)(struct cifsFileInfo *, struct cifs_fid *, __u32);
+	/* close a file */
+	void (*close)(const unsigned int, struct cifs_tcon *,
+		      struct cifs_fid *);
+	/* send a flush request to the server */
+	int (*flush)(const unsigned int, struct cifs_tcon *, struct cifs_fid *);
+	/* async read from the server */
+	int (*async_readv)(struct cifs_readdata *);
+	/* async write to the server */
+	int (*async_writev)(struct cifs_writedata *);
+	/* sync read from the server */
+	int (*sync_read)(const unsigned int, struct cifsFileInfo *,
+			 struct cifs_io_parms *, unsigned int *, char **,
+			 int *);
+	/* sync write to the server */
+	int (*sync_write)(const unsigned int, struct cifsFileInfo *,
+			  struct cifs_io_parms *, unsigned int *, struct kvec *,
+			  unsigned long);
+	/* open dir, start readdir */
+	int (*query_dir_first)(const unsigned int, struct cifs_tcon *,
+			       const char *, struct cifs_sb_info *,
+			       struct cifs_fid *, __u16,
+			       struct cifs_search_info *);
+	/* continue readdir */
+	int (*query_dir_next)(const unsigned int, struct cifs_tcon *,
+			      struct cifs_fid *,
+			      __u16, struct cifs_search_info *srch_inf);
+	/* close dir */
+	int (*close_dir)(const unsigned int, struct cifs_tcon *,
+			 struct cifs_fid *);
+	/* calculate a size of SMB message */
+	unsigned int (*calc_smb_size)(void *);
+	/* check for STATUS_PENDING and process it in a positive case */
+	bool (*is_status_pending)(char *, struct TCP_Server_Info *, int);
+	/* send oplock break response */
+	int (*oplock_response)(struct cifs_tcon *, struct cifs_fid *,
+			       struct cifsInodeInfo *);
+	/* query remote filesystem */
+	int (*queryfs)(const unsigned int, struct cifs_tcon *,
+		       struct kstatfs *);
+	/* send mandatory brlock to the server */
+	int (*mand_lock)(const unsigned int, struct cifsFileInfo *, __u64,
+			 __u64, __u32, int, int, bool);
+	/* unlock range of mandatory locks */
+	int (*mand_unlock_range)(struct cifsFileInfo *, struct file_lock *,
+				 const unsigned int);
+	/* push brlocks from the cache to the server */
+	int (*push_mand_locks)(struct cifsFileInfo *);
+	/* get lease key of the inode */
+	void (*get_lease_key)(struct inode *, struct cifs_fid *fid);
+	/* set lease key of the inode */
+	void (*set_lease_key)(struct inode *, struct cifs_fid *fid);
+	/* generate new lease key */
+	void (*new_lease_key)(struct cifs_fid *fid);
 };
 
 struct smb_version_values {
 	char		*version_string;
+	__u16		protocol_id;
+	__u32		req_capabilities;
 	__u32		large_lock_type;
 	__u32		exclusive_lock_type;
 	__u32		shared_lock_type;
@@ -496,6 +611,51 @@ get_next_mid(struct TCP_Server_Info *server)
 }
 
 /*
+ * When the server supports very large reads and writes via POSIX extensions,
+ * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not
+ * including the RFC1001 length.
+ *
+ * Note that this might make for "interesting" allocation problems during
+ * writeback however as we have to allocate an array of pointers for the
+ * pages. A 16M write means ~32kb page array with PAGE_CACHE_SIZE == 4096.
+ *
+ * For reads, there is a similar problem as we need to allocate an array
+ * of kvecs to handle the receive, though that should only need to be done
+ * once.
+ */
+#define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4)
+#define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4)
+
+/*
+ * When the server doesn't allow large posix writes, only allow a rsize/wsize
+ * of 2^17-1 minus the size of the call header. That allows for a read or
+ * write up to the maximum size described by RFC1002.
+ */
+#define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4)
+#define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4)
+
+/*
+ * The default wsize is 1M. find_get_pages seems to return a maximum of 256
+ * pages in a single call. With PAGE_CACHE_SIZE == 4k, this means we can fill
+ * a single wsize request with a single call.
+ */
+#define CIFS_DEFAULT_IOSIZE (1024 * 1024)
+
+/*
+ * Windows only supports a max of 60kb reads and 65535 byte writes. Default to
+ * those values when posix extensions aren't in force. In actuality here, we
+ * use 65536 to allow for a write that is a multiple of 4k. Most servers seem
+ * to be ok with the extra byte even though Windows doesn't send writes that
+ * are that large.
+ *
+ * Citation:
+ *
+ * http://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx
+ */
+#define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024)
+#define CIFS_DEFAULT_NON_POSIX_WSIZE (65536)
+
+/*
  * Macros to allow the TCP_Server_Info->net field and related code to drop out
  * when CONFIG_NET_NS isn't set.
  */
@@ -559,6 +719,7 @@ struct cifs_ses {
 	__u16 session_flags;
 #endif /* CONFIG_CIFS_SMB2 */
 };
+
 /* no more than one of the following three session flags may be set */
 #define CIFS_SES_NT4 1
 #define CIFS_SES_OS2 2
@@ -665,6 +826,7 @@ struct cifs_tcon {
 	u64 resource_id;		/* server resource id */
 	struct fscache_cookie *fscache;	/* cookie for share */
 #endif
+	struct list_head pending_opens;	/* list of incomplete opens */
 	/* BB add field for back pointer to sb struct(s)? */
 };
 
@@ -707,6 +869,15 @@ cifs_get_tlink(struct tcon_link *tlink)
 /* This function is always expected to succeed */
 extern struct cifs_tcon *cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb);
 
+#define CIFS_OPLOCK_NO_CHANGE 0xfe
+
+struct cifs_pending_open {
+	struct list_head olist;
+	struct tcon_link *tlink;
+	__u8 lease_key[16];
+	__u32 oplock;
+};
+
 /*
  * This info hangs off the cifsFileInfo structure, pointed to by llist.
  * This is used to track byte stream locks on the file
@@ -740,16 +911,29 @@ struct cifs_search_info {
 	bool smallBuf:1; /* so we know which buf_release function to call */
 };
 
+struct cifs_fid {
+	__u16 netfid;
+#ifdef CONFIG_CIFS_SMB2
+	__u64 persistent_fid;	/* persist file id for smb2 */
+	__u64 volatile_fid;	/* volatile file id for smb2 */
+	__u8 lease_key[SMB2_LEASE_KEY_SIZE];	/* lease key for smb2 */
+#endif
+	struct cifs_pending_open *pending_open;
+};
+
+struct cifs_fid_locks {
+	struct list_head llist;
+	struct cifsFileInfo *cfile;	/* fid that owns locks */
+	struct list_head locks;		/* locks held by fid above */
+};
+
 struct cifsFileInfo {
 	struct list_head tlist;	/* pointer to next fid owned by tcon */
 	struct list_head flist;	/* next fid (file instance) for this inode */
-	struct list_head llist;	/*
-				 * brlocks held by this fid, protected by
-				 * lock_mutex from cifsInodeInfo structure
-				 */
+	struct cifs_fid_locks *llist;	/* brlocks held by this fid */
 	unsigned int uid;	/* allows finding which FileInfo structure */
 	__u32 pid;		/* process id who opened file */
-	__u16 netfid;		/* file id from remote */
+	struct cifs_fid fid;	/* file id from remote */
 	/* BB add lock scope info here if needed */ ;
 	/* lock scope id (0 if none) */
 	struct dentry *dentry;
@@ -765,12 +949,60 @@ struct cifsFileInfo {
 
 struct cifs_io_parms {
 	__u16 netfid;
+#ifdef CONFIG_CIFS_SMB2
+	__u64 persistent_fid;	/* persist file id for smb2 */
+	__u64 volatile_fid;	/* volatile file id for smb2 */
+#endif
 	__u32 pid;
 	__u64 offset;
 	unsigned int length;
 	struct cifs_tcon *tcon;
 };
 
+struct cifs_readdata;
+
+/* asynchronous read support */
+struct cifs_readdata {
+	struct kref			refcount;
+	struct list_head		list;
+	struct completion		done;
+	struct cifsFileInfo		*cfile;
+	struct address_space		*mapping;
+	__u64				offset;
+	unsigned int			bytes;
+	pid_t				pid;
+	int				result;
+	struct work_struct		work;
+	int (*read_into_pages)(struct TCP_Server_Info *server,
+				struct cifs_readdata *rdata,
+				unsigned int len);
+	struct kvec			iov;
+	unsigned int			pagesz;
+	unsigned int			tailsz;
+	unsigned int			nr_pages;
+	struct page			*pages[];
+};
+
+struct cifs_writedata;
+
+/* asynchronous write support */
+struct cifs_writedata {
+	struct kref			refcount;
+	struct list_head		list;
+	struct completion		done;
+	enum writeback_sync_modes	sync_mode;
+	struct work_struct		work;
+	struct cifsFileInfo		*cfile;
+	__u64				offset;
+	pid_t				pid;
+	unsigned int			bytes;
+	int				result;
+	unsigned int			pagesz;
+	unsigned int			tailsz;
+	unsigned int			nr_pages;
+	struct page			*pages[1];
+};
+
 /*
  * Take a reference on the file private data. Must be called with
  * cifs_file_list_lock held.
@@ -790,11 +1022,8 @@ void cifsFileInfo_put(struct cifsFileInfo *cifs_file);
 
 struct cifsInodeInfo {
 	bool can_cache_brlcks;
-	struct mutex lock_mutex;	/*
-					 * protect the field above and llist
-					 * from every cifsFileInfo structure
-					 * from openFileList
-					 */
+	struct list_head llist;	/* locks helb by this inode */
+	struct rw_semaphore lock_sem;	/* protect the fields above */
 	/* BB add in lists for dirty pages i.e. write caching info for oplock */
 	struct list_head openFileList;
 	__u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
@@ -806,6 +1035,9 @@ struct cifsInodeInfo {
 	u64  server_eof;		/* current file size on server -- protected by i_lock */
 	u64  uniqueid;			/* server inode number */
 	u64  createtime;		/* creation time on server */
+#ifdef CONFIG_CIFS_SMB2
+	__u8 lease_key[SMB2_LEASE_KEY_SIZE];	/* lease key for this inode */
+#endif
 #ifdef CONFIG_CIFS_FSCACHE
 	struct fscache_cookie *fscache;
 #endif
@@ -1130,7 +1362,7 @@ require use of the stronger protocol */
 #define   CIFSSEC_MUST_SEAL	0x40040 /* not supported yet */
 #define   CIFSSEC_MUST_NTLMSSP	0x80080 /* raw ntlmssp with ntlmv2 */
 
-#define   CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2)
+#define   CIFSSEC_DEF (CIFSSEC_MAY_SIGN | CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_NTLMSSP)
 #define   CIFSSEC_MAX (CIFSSEC_MUST_SIGN | CIFSSEC_MUST_NTLMV2)
 #define   CIFSSEC_AUTH_MASK (CIFSSEC_MAY_NTLM | CIFSSEC_MAY_NTLMV2 | CIFSSEC_MAY_LANMAN | CIFSSEC_MAY_PLNTXT | CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP)
 /*
@@ -1267,7 +1499,13 @@ extern mempool_t *cifs_mid_poolp;
 #define SMB1_VERSION_STRING	"1.0"
 extern struct smb_version_operations smb1_operations;
 extern struct smb_version_values smb1_values;
+#define SMB20_VERSION_STRING	"2.0"
+/*extern struct smb_version_operations smb20_operations; */ /* not needed yet */
+extern struct smb_version_values smb20_values;
 #define SMB21_VERSION_STRING	"2.1"
 extern struct smb_version_operations smb21_operations;
 extern struct smb_version_values smb21_values;
+#define SMB30_VERSION_STRING	"3.0"
+/*extern struct smb_version_operations smb30_operations; */ /* not needed yet */
+extern struct smb_version_values smb30_values;
 #endif	/* _CIFS_GLOB_H */