imported original firmware WRT54GL_v4.30.11_11_US

1 files changed, 389 insertions, 0 deletions

diff --git a/release/src/linux/linux/include/linux/nfs_fs.h b/release/src/linux/linux/include/linux/nfs_fs.h
new file mode 100644
index 00000000..5b5838b2
--- /dev/null
+++ b/release/src/linux/linux/include/linux/nfs_fs.h
@@ -0,0 +1,389 @@
+/*
+ *  linux/include/linux/nfs_fs.h
+ *
+ *  Copyright (C) 1992  Rick Sladkey
+ *
+ *  OS-specific nfs filesystem definitions and declarations
+ */
+
+#ifndef _LINUX_NFS_FS_H
+#define _LINUX_NFS_FS_H
+
+#include <linux/config.h>
+#include <linux/in.h>
+#include <linux/mm.h>
+#include <linux/pagemap.h>
+
+#include <linux/sunrpc/debug.h>
+#include <linux/sunrpc/auth.h>
+#include <linux/sunrpc/clnt.h>
+
+#include <linux/nfs.h>
+#include <linux/nfs2.h>
+#include <linux/nfs3.h>
+#include <linux/nfs_xdr.h>
+
+/*
+ * Enable debugging support for nfs client.
+ * Requires RPC_DEBUG.
+ */
+#ifdef RPC_DEBUG
+# define NFS_DEBUG
+#endif
+
+/*
+ * NFS_MAX_DIRCACHE controls the number of simultaneously cached
+ * directory chunks. Each chunk holds the list of nfs_entry's returned
+ * in a single readdir call in a memory region of size PAGE_SIZE.
+ *
+ * Note that at most server->rsize bytes of the cache memory are used.
+ */
+#define NFS_MAX_DIRCACHE		16
+
+#define NFS_MAX_FILE_IO_BUFFER_SIZE	32768
+#define NFS_DEF_FILE_IO_BUFFER_SIZE	4096
+
+/*
+ * The upper limit on timeouts for the exponential backoff algorithm.
+ */
+#define NFS_MAX_RPC_TIMEOUT		(6*HZ)
+#define NFS_READ_DELAY			(2*HZ)
+#define NFS_WRITEBACK_DELAY		(5*HZ)
+#define NFS_WRITEBACK_LOCKDELAY		(60*HZ)
+#define NFS_COMMIT_DELAY		(5*HZ)
+
+/*
+ * Size of the lookup cache in units of number of entries cached.
+ * It is better not to make this too large although the optimum
+ * depends on a usage and environment.
+ */
+#define NFS_LOOKUP_CACHE_SIZE		64
+
+/*
+ * superblock magic number for NFS
+ */
+#define NFS_SUPER_MAGIC			0x6969
+
+static inline struct nfs_inode_info *NFS_I(struct inode *inode)
+{
+	return &inode->u.nfs_i;
+}
+
+#define NFS_FH(inode)			(&(inode)->u.nfs_i.fh)
+#define NFS_SERVER(inode)		(&(inode)->i_sb->u.nfs_sb.s_server)
+#define NFS_CLIENT(inode)		(NFS_SERVER(inode)->client)
+#define NFS_PROTO(inode)		(NFS_SERVER(inode)->rpc_ops)
+#define NFS_REQUESTLIST(inode)		(NFS_SERVER(inode)->rw_requests)
+#define NFS_ADDR(inode)			(RPC_PEERADDR(NFS_CLIENT(inode)))
+#define NFS_CONGESTED(inode)		(RPC_CONGESTED(NFS_CLIENT(inode)))
+#define NFS_COOKIEVERF(inode)		((inode)->u.nfs_i.cookieverf)
+#define NFS_READTIME(inode)		((inode)->u.nfs_i.read_cache_jiffies)
+#define NFS_MTIME_UPDATE(inode)		((inode)->u.nfs_i.cache_mtime_jiffies)
+#define NFS_CACHE_CTIME(inode)		((inode)->u.nfs_i.read_cache_ctime)
+#define NFS_CACHE_MTIME(inode)		((inode)->u.nfs_i.read_cache_mtime)
+#define NFS_CACHE_ISIZE(inode)		((inode)->u.nfs_i.read_cache_isize)
+#define NFS_NEXTSCAN(inode)		((inode)->u.nfs_i.nextscan)
+#define NFS_CACHEINV(inode) \
+do { \
+	NFS_READTIME(inode) = jiffies - NFS_MAXATTRTIMEO(inode) - 1; \
+} while (0)
+#define NFS_ATTRTIMEO(inode)		((inode)->u.nfs_i.attrtimeo)
+#define NFS_MINATTRTIMEO(inode) \
+	(S_ISDIR(inode->i_mode)? NFS_SERVER(inode)->acdirmin \
+			       : NFS_SERVER(inode)->acregmin)
+#define NFS_MAXATTRTIMEO(inode) \
+	(S_ISDIR(inode->i_mode)? NFS_SERVER(inode)->acdirmax \
+			       : NFS_SERVER(inode)->acregmax)
+#define NFS_ATTRTIMEO_UPDATE(inode)	((inode)->u.nfs_i.attrtimeo_timestamp)
+
+#define NFS_FLAGS(inode)		((inode)->u.nfs_i.flags)
+#define NFS_REVALIDATING(inode)		(NFS_FLAGS(inode) & NFS_INO_REVALIDATING)
+#define NFS_STALE(inode)		(NFS_FLAGS(inode) & NFS_INO_STALE)
+
+#define NFS_FILEID(inode)		((inode)->u.nfs_i.fileid)
+
+/* Inode Flags */
+#define NFS_USE_READDIRPLUS(inode)	((NFS_FLAGS(inode) & NFS_INO_ADVISE_RDPLUS) ? 1 : 0)
+
+/*
+ * These are the default flags for swap requests
+ */
+#define NFS_RPC_SWAPFLAGS		(RPC_TASK_SWAPPER|RPC_TASK_ROOTCREDS)
+
+/* Flags in the RPC client structure */
+#define NFS_CLNTF_BUFSIZE	0x0001	/* readdir buffer in longwords */
+
+#define NFS_RW_SYNC		0x0001	/* O_SYNC handling */
+#define NFS_RW_SWAP		0x0002	/* This is a swap request */
+
+/*
+ * When flushing a cluster of dirty pages, there can be different
+ * strategies:
+ */
+#define FLUSH_AGING		0	/* only flush old buffers */
+#define FLUSH_SYNC		1	/* file being synced, or contention */
+#define FLUSH_WAIT		2	/* wait for completion */
+#define FLUSH_STABLE		4	/* commit to stable storage */
+
+static inline
+loff_t page_offset(struct page *page)
+{
+	return ((loff_t)page->index) << PAGE_CACHE_SHIFT;
+}
+
+static inline
+unsigned long page_index(struct page *page)
+{
+	return page->index;
+}
+
+#ifdef __KERNEL__
+/*
+ * linux/fs/nfs/inode.c
+ */
+extern struct super_block *nfs_read_super(struct super_block *, void *, int);
+extern void nfs_zap_caches(struct inode *);
+extern int nfs_inode_is_stale(struct inode *, struct nfs_fh *,
+				struct nfs_fattr *);
+extern struct inode *nfs_fhget(struct dentry *, struct nfs_fh *,
+				struct nfs_fattr *);
+extern int __nfs_refresh_inode(struct inode *, struct nfs_fattr *);
+extern int nfs_revalidate(struct dentry *);
+extern int nfs_permission(struct inode *, int);
+extern int nfs_open(struct inode *, struct file *);
+extern int nfs_release(struct inode *, struct file *);
+extern int __nfs_revalidate_inode(struct nfs_server *, struct inode *);
+extern int nfs_check_stale(struct inode *);
+extern int nfs_notify_change(struct dentry *, struct iattr *);
+
+/*
+ * linux/fs/nfs/file.c
+ */
+extern struct inode_operations nfs_file_inode_operations;
+extern struct file_operations nfs_file_operations;
+extern struct address_space_operations nfs_file_aops;
+
+static __inline__ struct rpc_cred *
+nfs_file_cred(struct file *file)
+{
+	struct rpc_cred *cred = NULL;
+	if (file)
+		cred = (struct rpc_cred *)file->private_data;
+#ifdef RPC_DEBUG
+	if (cred && cred->cr_magic != RPCAUTH_CRED_MAGIC)
+		out_of_line_bug();
+#endif
+	return cred;
+}
+
+/*
+ * linux/fs/nfs/dir.c
+ */
+extern struct inode_operations nfs_dir_inode_operations;
+extern struct file_operations nfs_dir_operations;
+extern struct dentry_operations nfs_dentry_operations;
+
+/*
+ * linux/fs/nfs/symlink.c
+ */
+extern struct inode_operations nfs_symlink_inode_operations;
+
+/*
+ * linux/fs/nfs/locks.c
+ */
+extern int nfs_lock(struct file *, int, struct file_lock *);
+
+/*
+ * linux/fs/nfs/unlink.c
+ */
+extern int  nfs_async_unlink(struct dentry *);
+extern void nfs_complete_unlink(struct dentry *);
+
+/*
+ * linux/fs/nfs/write.c
+ */
+extern int  nfs_writepage(struct page *);
+extern int  nfs_flush_incompatible(struct file *file, struct page *page);
+extern int  nfs_updatepage(struct file *, struct page *, unsigned int, unsigned int);
+/*
+ * Try to write back everything synchronously (but check the
+ * return value!)
+ */
+extern int  nfs_sync_file(struct inode *, struct file *, unsigned long, unsigned int, int);
+extern int  nfs_flush_file(struct inode *, struct file *, unsigned long, unsigned int, int);
+extern int  nfs_flush_list(struct list_head *, int, int);
+extern int  nfs_scan_lru_dirty(struct nfs_server *, struct list_head *);
+extern int  nfs_scan_lru_dirty_timeout(struct nfs_server *, struct list_head *);
+#ifdef CONFIG_NFS_V3
+extern int  nfs_commit_file(struct inode *, struct file *, unsigned long, unsigned int, int);
+extern int  nfs_commit_list(struct list_head *, int);
+extern int  nfs_scan_lru_commit(struct nfs_server *, struct list_head *);
+extern int  nfs_scan_lru_commit_timeout(struct nfs_server *, struct list_head *);
+#endif
+
+static inline int
+nfs_have_read(struct inode *inode)
+{
+	return !list_empty(&inode->u.nfs_i.read);
+}
+
+static inline int
+nfs_have_writebacks(struct inode *inode)
+{
+	return !list_empty(&inode->u.nfs_i.writeback);
+}
+
+static inline int
+nfs_wb_all(struct inode *inode)
+{
+	int error = nfs_sync_file(inode, 0, 0, 0, FLUSH_WAIT);
+	return (error < 0) ? error : 0;
+}
+
+/*
+ * Write back all requests on one page - we do this before reading it.
+ */
+static inline int
+nfs_wb_page(struct inode *inode, struct page* page)
+{
+	int error = nfs_sync_file(inode, 0, page_index(page), 1, FLUSH_WAIT | FLUSH_STABLE);
+	return (error < 0) ? error : 0;
+}
+
+/*
+ * Write back all pending writes for one user.. 
+ */
+static inline int
+nfs_wb_file(struct inode *inode, struct file *file)
+{
+	int error = nfs_sync_file(inode, file, 0, 0, FLUSH_WAIT);
+	return (error < 0) ? error : 0;
+}
+
+/*
+ * linux/fs/nfs/read.c
+ */
+extern int  nfs_readpage(struct file *, struct page *);
+extern int  nfs_pagein_inode(struct inode *, unsigned long, unsigned int);
+extern int  nfs_pagein_list(struct list_head *, int);
+extern int  nfs_scan_lru_read(struct nfs_server *, struct list_head *);
+extern int  nfs_scan_lru_read_timeout(struct nfs_server *, struct list_head *);
+
+/*
+ * linux/fs/mount_clnt.c
+ * (Used only by nfsroot module)
+ */
+extern int  nfsroot_mount(struct sockaddr_in *, char *, struct nfs_fh *,
+		int, int);
+
+/* linux/net/ipv4/ipconfig.c: trims ip addr off front of name, too. */
+extern u32 root_nfs_parse_addr(char *name); /*__init*/
+
+/*
+ * inline functions
+ */
+static inline int
+nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
+{
+	if (time_before(jiffies, NFS_READTIME(inode)+NFS_ATTRTIMEO(inode)))
+		return NFS_STALE(inode) ? -ESTALE : 0;
+	return __nfs_revalidate_inode(server, inode);
+}
+
+static inline int
+nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr)
+{
+	if ((fattr->valid & NFS_ATTR_FATTR) == 0)
+		return 0;
+	return __nfs_refresh_inode(inode,fattr);
+}
+
+static inline loff_t
+nfs_size_to_loff_t(__u64 size)
+{
+	loff_t maxsz = (((loff_t) ULONG_MAX) << PAGE_CACHE_SHIFT) + PAGE_CACHE_SIZE - 1;
+	if (size > maxsz)
+		return maxsz;
+	return (loff_t) size;
+}
+
+static inline ino_t
+nfs_fileid_to_ino_t(u64 fileid)
+{
+	ino_t ino = (ino_t) fileid;
+	if (sizeof(ino_t) < sizeof(u64))
+		ino ^= fileid >> (sizeof(u64)-sizeof(ino_t)) * 8;
+	return ino;
+}
+
+static inline time_t
+nfs_time_to_secs(__u64 time)
+{
+	return (time_t)(time >> 32);
+}
+
+/* NFS root */
+
+extern void * nfs_root_data(void);
+
+#define nfs_wait_event(clnt, wq, condition)				\
+({									\
+	int __retval = 0;						\
+	if (clnt->cl_intr) {						\
+		sigset_t oldmask;					\
+		rpc_clnt_sigmask(clnt, &oldmask);			\
+		__retval = wait_event_interruptible(wq, condition);	\
+		rpc_clnt_sigunmask(clnt, &oldmask);			\
+	} else								\
+		wait_event(wq, condition);				\
+	__retval;							\
+})
+
+#ifdef CONFIG_NFS_V3
+
+#define NFS_JUKEBOX_RETRY_TIME (5 * HZ)
+static inline int
+nfs_async_handle_jukebox(struct rpc_task *task)
+{
+	if (task->tk_status != -EJUKEBOX)
+		return 0;
+	task->tk_status = 0;
+	rpc_restart_call(task);
+	rpc_delay(task, NFS_JUKEBOX_RETRY_TIME);
+	return 1;
+}
+
+#else
+
+static inline int
+nfs_async_handle_jukebox(struct rpc_task *task)
+{
+	return 0;
+}
+#endif /* CONFIG_NFS_V3 */
+
+#endif /* __KERNEL__ */
+
+/*
+ * NFS debug flags
+ */
+#define NFSDBG_VFS		0x0001
+#define NFSDBG_DIRCACHE		0x0002
+#define NFSDBG_LOOKUPCACHE	0x0004
+#define NFSDBG_PAGECACHE	0x0008
+#define NFSDBG_PROC		0x0010
+#define NFSDBG_XDR		0x0020
+#define NFSDBG_FILE		0x0040
+#define NFSDBG_ROOT		0x0080
+#define NFSDBG_ALL		0xFFFF
+
+#ifdef __KERNEL__
+# undef ifdebug
+# ifdef NFS_DEBUG
+#  define ifdebug(fac)		if (nfs_debug & NFSDBG_##fac)
+# else
+#  define ifdebug(fac)		if (0)
+# endif
+#endif /* __KERNEL */
+
+#endif