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 */
struct dfs_info3_param;
struct cifs_fattr;
struct smb_vol;
+struct cifs_fid;
+struct cifs_readdata;
+struct cifs_writedata;
+struct cifs_io_parms;
struct smb_version_operations {
int (*send_cancel)(struct TCP_Server_Info *, void *,
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 *);
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 *);
/* 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 */
+ int (*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);
};
struct smb_version_values {
return server->ops->get_next_mid(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)
+
+/*
+ * On hosts with high memory, we can't currently support wsize/rsize that are
+ * larger than we can kmap at once. Cap the rsize/wsize at
+ * LAST_PKMAP * PAGE_SIZE. We'll never be able to fill a read or write request
+ * larger than that anyway.
+ */
+#ifdef CONFIG_HIGHMEM
+#define CIFS_KMAP_SIZE_LIMIT (LAST_PKMAP * PAGE_CACHE_SIZE)
+#else /* CONFIG_HIGHMEM */
+#define CIFS_KMAP_SIZE_LIMIT (1<<24)
+#endif /* CONFIG_HIGHMEM */
+
+#ifdef CONFIG_HIGHMEM
+/*
+ * On arches that have high memory, kmap address space is limited. By
+ * serializing the kmap operations on those arches, we ensure that we don't
+ * end up with a bunch of threads in writeback with partially mapped page
+ * arrays, stuck waiting for kmap to come back. That situation prevents
+ * progress and can deadlock.
+ */
+
+extern struct mutex cifs_kmap_mutex;
+
+static inline void
+cifs_kmap_lock(void)
+{
+ mutex_lock(&cifs_kmap_mutex);
+}
+
+static inline void
+cifs_kmap_unlock(void)
+{
+ mutex_unlock(&cifs_kmap_mutex);
+}
+#else /* !CONFIG_HIGHMEM */
+#define cifs_kmap_lock() do { ; } while (0)
+#define cifs_kmap_unlock() do { ; } while (0)
+#endif /* CONFIG_HIGHMEM */
+
/*
* Macros to allow the TCP_Server_Info->net field and related code to drop out
* when CONFIG_NET_NS isn't set.
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 */
+#endif
+};
+
struct cifsFileInfo {
struct list_head tlist; /* pointer to next fid owned by tcon */
struct list_head flist; /* next fid (file instance) for this inode */
*/
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;
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 list_head pages;
+ struct work_struct work;
+ int (*marshal_iov) (struct cifs_readdata *rdata,
+ unsigned int remaining);
+ unsigned int nr_iov;
+ struct kvec iov[1];
+};
+
+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;
+ void (*marshal_iov) (struct kvec *iov,
+ struct cifs_writedata *wdata);
+ 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.
projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blobdiff