Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 655 insertions, 0 deletions

diff --git a/fs/nfs/proc.c b/fs/nfs/proc.c
new file mode 100644
index 000000000000..d31b4d6e5a5e
--- /dev/null
+++ b/fs/nfs/proc.c
@@ -0,0 +1,655 @@
+/*
+ *  linux/fs/nfs/proc.c
+ *
+ *  Copyright (C) 1992, 1993, 1994  Rick Sladkey
+ *
+ *  OS-independent nfs remote procedure call functions
+ *
+ *  Tuned by Alan Cox <A.Cox@swansea.ac.uk> for >3K buffers
+ *  so at last we can have decent(ish) throughput off a 
+ *  Sun server.
+ *
+ *  Coding optimized and cleaned up by Florian La Roche.
+ *  Note: Error returns are optimized for NFS_OK, which isn't translated via
+ *  nfs_stat_to_errno(), but happens to be already the right return code.
+ *
+ *  Also, the code currently doesn't check the size of the packet, when
+ *  it decodes the packet.
+ *
+ *  Feel free to fix it and mail me the diffs if it worries you.
+ *
+ *  Completely rewritten to support the new RPC call interface;
+ *  rewrote and moved the entire XDR stuff to xdr.c
+ *  --Olaf Kirch June 1996
+ *
+ *  The code below initializes all auto variables explicitly, otherwise
+ *  it will fail to work as a module (gcc generates a memset call for an
+ *  incomplete struct).
+ */
+
+#include <linux/types.h>
+#include <linux/param.h>
+#include <linux/slab.h>
+#include <linux/time.h>
+#include <linux/mm.h>
+#include <linux/utsname.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/in.h>
+#include <linux/pagemap.h>
+#include <linux/sunrpc/clnt.h>
+#include <linux/nfs.h>
+#include <linux/nfs2.h>
+#include <linux/nfs_fs.h>
+#include <linux/nfs_page.h>
+#include <linux/lockd/bind.h>
+#include <linux/smp_lock.h>
+
+#define NFSDBG_FACILITY		NFSDBG_PROC
+
+extern struct rpc_procinfo nfs_procedures[];
+
+/*
+ * Bare-bones access to getattr: this is for nfs_read_super.
+ */
+static int
+nfs_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
+		  struct nfs_fsinfo *info)
+{
+	struct nfs_fattr *fattr = info->fattr;
+	struct nfs2_fsstat fsinfo;
+	int status;
+
+	dprintk("%s: call getattr\n", __FUNCTION__);
+	fattr->valid = 0;
+	status = rpc_call(server->client_sys, NFSPROC_GETATTR, fhandle, fattr, 0);
+	dprintk("%s: reply getattr: %d\n", __FUNCTION__, status);
+	if (status)
+		return status;
+	dprintk("%s: call statfs\n", __FUNCTION__);
+	status = rpc_call(server->client_sys, NFSPROC_STATFS, fhandle, &fsinfo, 0);
+	dprintk("%s: reply statfs: %d\n", __FUNCTION__, status);
+	if (status)
+		return status;
+	info->rtmax  = NFS_MAXDATA;
+	info->rtpref = fsinfo.tsize;
+	info->rtmult = fsinfo.bsize;
+	info->wtmax  = NFS_MAXDATA;
+	info->wtpref = fsinfo.tsize;
+	info->wtmult = fsinfo.bsize;
+	info->dtpref = fsinfo.tsize;
+	info->maxfilesize = 0x7FFFFFFF;
+	info->lease_time = 0;
+	return 0;
+}
+
+/*
+ * One function for each procedure in the NFS protocol.
+ */
+static int
+nfs_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
+		struct nfs_fattr *fattr)
+{
+	int	status;
+
+	dprintk("NFS call  getattr\n");
+	fattr->valid = 0;
+	status = rpc_call(server->client, NFSPROC_GETATTR,
+				fhandle, fattr, 0);
+	dprintk("NFS reply getattr: %d\n", status);
+	return status;
+}
+
+static int
+nfs_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
+		 struct iattr *sattr)
+{
+	struct inode *inode = dentry->d_inode;
+	struct nfs_sattrargs	arg = { 
+		.fh	= NFS_FH(inode),
+		.sattr	= sattr
+	};
+	int	status;
+
+	dprintk("NFS call  setattr\n");
+	fattr->valid = 0;
+	status = rpc_call(NFS_CLIENT(inode), NFSPROC_SETATTR, &arg, fattr, 0);
+	dprintk("NFS reply setattr: %d\n", status);
+	return status;
+}
+
+static int
+nfs_proc_lookup(struct inode *dir, struct qstr *name,
+		struct nfs_fh *fhandle, struct nfs_fattr *fattr)
+{
+	struct nfs_diropargs	arg = {
+		.fh		= NFS_FH(dir),
+		.name		= name->name,
+		.len		= name->len
+	};
+	struct nfs_diropok	res = {
+		.fh		= fhandle,
+		.fattr		= fattr
+	};
+	int			status;
+
+	dprintk("NFS call  lookup %s\n", name->name);
+	fattr->valid = 0;
+	status = rpc_call(NFS_CLIENT(dir), NFSPROC_LOOKUP, &arg, &res, 0);
+	dprintk("NFS reply lookup: %d\n", status);
+	return status;
+}
+
+static int nfs_proc_readlink(struct inode *inode, struct page *page,
+		unsigned int pgbase, unsigned int pglen)
+{
+	struct nfs_readlinkargs	args = {
+		.fh		= NFS_FH(inode),
+		.pgbase		= pgbase,
+		.pglen		= pglen,
+		.pages		= &page
+	};
+	int			status;
+
+	dprintk("NFS call  readlink\n");
+	status = rpc_call(NFS_CLIENT(inode), NFSPROC_READLINK, &args, NULL, 0);
+	dprintk("NFS reply readlink: %d\n", status);
+	return status;
+}
+
+static int nfs_proc_read(struct nfs_read_data *rdata)
+{
+	int			flags = rdata->flags;
+	struct inode *		inode = rdata->inode;
+	struct nfs_fattr *	fattr = rdata->res.fattr;
+	struct rpc_message	msg = {
+		.rpc_proc	= &nfs_procedures[NFSPROC_READ],
+		.rpc_argp	= &rdata->args,
+		.rpc_resp	= &rdata->res,
+		.rpc_cred	= rdata->cred,
+	};
+	int			status;
+
+	dprintk("NFS call  read %d @ %Ld\n", rdata->args.count,
+			(long long) rdata->args.offset);
+	fattr->valid = 0;
+	status = rpc_call_sync(NFS_CLIENT(inode), &msg, flags);
+	if (status >= 0) {
+		nfs_refresh_inode(inode, fattr);
+		/* Emulate the eof flag, which isn't normally needed in NFSv2
+		 * as it is guaranteed to always return the file attributes
+		 */
+		if (rdata->args.offset + rdata->args.count >= fattr->size)
+			rdata->res.eof = 1;
+	}
+	dprintk("NFS reply read: %d\n", status);
+	return status;
+}
+
+static int nfs_proc_write(struct nfs_write_data *wdata)
+{
+	int			flags = wdata->flags;
+	struct inode *		inode = wdata->inode;
+	struct nfs_fattr *	fattr = wdata->res.fattr;
+	struct rpc_message	msg = {
+		.rpc_proc	= &nfs_procedures[NFSPROC_WRITE],
+		.rpc_argp	= &wdata->args,
+		.rpc_resp	= &wdata->res,
+		.rpc_cred	= wdata->cred,
+	};
+	int			status;
+
+	dprintk("NFS call  write %d @ %Ld\n", wdata->args.count,
+			(long long) wdata->args.offset);
+	fattr->valid = 0;
+	status = rpc_call_sync(NFS_CLIENT(inode), &msg, flags);
+	if (status >= 0) {
+		nfs_refresh_inode(inode, fattr);
+		wdata->res.count = wdata->args.count;
+		wdata->verf.committed = NFS_FILE_SYNC;
+	}
+	dprintk("NFS reply write: %d\n", status);
+	return status < 0? status : wdata->res.count;
+}
+
+static int
+nfs_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
+		int flags)
+{
+	struct nfs_fh		fhandle;
+	struct nfs_fattr	fattr;
+	struct nfs_createargs	arg = {
+		.fh		= NFS_FH(dir),
+		.name		= dentry->d_name.name,
+		.len		= dentry->d_name.len,
+		.sattr		= sattr
+	};
+	struct nfs_diropok	res = {
+		.fh		= &fhandle,
+		.fattr		= &fattr
+	};
+	int			status;
+
+	fattr.valid = 0;
+	dprintk("NFS call  create %s\n", dentry->d_name.name);
+	status = rpc_call(NFS_CLIENT(dir), NFSPROC_CREATE, &arg, &res, 0);
+	if (status == 0)
+		status = nfs_instantiate(dentry, &fhandle, &fattr);
+	dprintk("NFS reply create: %d\n", status);
+	return status;
+}
+
+/*
+ * In NFSv2, mknod is grafted onto the create call.
+ */
+static int
+nfs_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
+	       dev_t rdev)
+{
+	struct nfs_fh fhandle;
+	struct nfs_fattr fattr;
+	struct nfs_createargs	arg = {
+		.fh		= NFS_FH(dir),
+		.name		= dentry->d_name.name,
+		.len		= dentry->d_name.len,
+		.sattr		= sattr
+	};
+	struct nfs_diropok	res = {
+		.fh		= &fhandle,
+		.fattr		= &fattr
+	};
+	int status, mode;
+
+	dprintk("NFS call  mknod %s\n", dentry->d_name.name);
+
+	mode = sattr->ia_mode;
+	if (S_ISFIFO(mode)) {
+		sattr->ia_mode = (mode & ~S_IFMT) | S_IFCHR;
+		sattr->ia_valid &= ~ATTR_SIZE;
+	} else if (S_ISCHR(mode) || S_ISBLK(mode)) {
+		sattr->ia_valid |= ATTR_SIZE;
+		sattr->ia_size = new_encode_dev(rdev);/* get out your barf bag */
+	}
+
+	fattr.valid = 0;
+	status = rpc_call(NFS_CLIENT(dir), NFSPROC_CREATE, &arg, &res, 0);
+
+	if (status == -EINVAL && S_ISFIFO(mode)) {
+		sattr->ia_mode = mode;
+		fattr.valid = 0;
+		status = rpc_call(NFS_CLIENT(dir), NFSPROC_CREATE, &arg, &res, 0);
+	}
+	if (status == 0)
+		status = nfs_instantiate(dentry, &fhandle, &fattr);
+	dprintk("NFS reply mknod: %d\n", status);
+	return status;
+}
+  
+static int
+nfs_proc_remove(struct inode *dir, struct qstr *name)
+{
+	struct nfs_diropargs	arg = {
+		.fh		= NFS_FH(dir),
+		.name		= name->name,
+		.len		= name->len
+	};
+	struct rpc_message	msg = { 
+		.rpc_proc	= &nfs_procedures[NFSPROC_REMOVE],
+		.rpc_argp	= &arg,
+		.rpc_resp	= NULL,
+		.rpc_cred	= NULL
+	};
+	int			status;
+
+	dprintk("NFS call  remove %s\n", name->name);
+	status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
+
+	dprintk("NFS reply remove: %d\n", status);
+	return status;
+}
+
+static int
+nfs_proc_unlink_setup(struct rpc_message *msg, struct dentry *dir, struct qstr *name)
+{
+	struct nfs_diropargs	*arg;
+
+	arg = (struct nfs_diropargs *)kmalloc(sizeof(*arg), GFP_KERNEL);
+	if (!arg)
+		return -ENOMEM;
+	arg->fh = NFS_FH(dir->d_inode);
+	arg->name = name->name;
+	arg->len = name->len;
+	msg->rpc_proc = &nfs_procedures[NFSPROC_REMOVE];
+	msg->rpc_argp = arg;
+	return 0;
+}
+
+static int
+nfs_proc_unlink_done(struct dentry *dir, struct rpc_task *task)
+{
+	struct rpc_message *msg = &task->tk_msg;
+	
+	if (msg->rpc_argp)
+		kfree(msg->rpc_argp);
+	return 0;
+}
+
+static int
+nfs_proc_rename(struct inode *old_dir, struct qstr *old_name,
+		struct inode *new_dir, struct qstr *new_name)
+{
+	struct nfs_renameargs	arg = {
+		.fromfh		= NFS_FH(old_dir),
+		.fromname	= old_name->name,
+		.fromlen	= old_name->len,
+		.tofh		= NFS_FH(new_dir),
+		.toname		= new_name->name,
+		.tolen		= new_name->len
+	};
+	int			status;
+
+	dprintk("NFS call  rename %s -> %s\n", old_name->name, new_name->name);
+	status = rpc_call(NFS_CLIENT(old_dir), NFSPROC_RENAME, &arg, NULL, 0);
+	dprintk("NFS reply rename: %d\n", status);
+	return status;
+}
+
+static int
+nfs_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
+{
+	struct nfs_linkargs	arg = {
+		.fromfh		= NFS_FH(inode),
+		.tofh		= NFS_FH(dir),
+		.toname		= name->name,
+		.tolen		= name->len
+	};
+	int			status;
+
+	dprintk("NFS call  link %s\n", name->name);
+	status = rpc_call(NFS_CLIENT(inode), NFSPROC_LINK, &arg, NULL, 0);
+	dprintk("NFS reply link: %d\n", status);
+	return status;
+}
+
+static int
+nfs_proc_symlink(struct inode *dir, struct qstr *name, struct qstr *path,
+		 struct iattr *sattr, struct nfs_fh *fhandle,
+		 struct nfs_fattr *fattr)
+{
+	struct nfs_symlinkargs	arg = {
+		.fromfh		= NFS_FH(dir),
+		.fromname	= name->name,
+		.fromlen	= name->len,
+		.topath		= path->name,
+		.tolen		= path->len,
+		.sattr		= sattr
+	};
+	int			status;
+
+	if (path->len > NFS2_MAXPATHLEN)
+		return -ENAMETOOLONG;
+	dprintk("NFS call  symlink %s -> %s\n", name->name, path->name);
+	fattr->valid = 0;
+	fhandle->size = 0;
+	status = rpc_call(NFS_CLIENT(dir), NFSPROC_SYMLINK, &arg, NULL, 0);
+	dprintk("NFS reply symlink: %d\n", status);
+	return status;
+}
+
+static int
+nfs_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr)
+{
+	struct nfs_fh fhandle;
+	struct nfs_fattr fattr;
+	struct nfs_createargs	arg = {
+		.fh		= NFS_FH(dir),
+		.name		= dentry->d_name.name,
+		.len		= dentry->d_name.len,
+		.sattr		= sattr
+	};
+	struct nfs_diropok	res = {
+		.fh		= &fhandle,
+		.fattr		= &fattr
+	};
+	int			status;
+
+	dprintk("NFS call  mkdir %s\n", dentry->d_name.name);
+	fattr.valid = 0;
+	status = rpc_call(NFS_CLIENT(dir), NFSPROC_MKDIR, &arg, &res, 0);
+	if (status == 0)
+		status = nfs_instantiate(dentry, &fhandle, &fattr);
+	dprintk("NFS reply mkdir: %d\n", status);
+	return status;
+}
+
+static int
+nfs_proc_rmdir(struct inode *dir, struct qstr *name)
+{
+	struct nfs_diropargs	arg = {
+		.fh		= NFS_FH(dir),
+		.name		= name->name,
+		.len		= name->len
+	};
+	int			status;
+
+	dprintk("NFS call  rmdir %s\n", name->name);
+	status = rpc_call(NFS_CLIENT(dir), NFSPROC_RMDIR, &arg, NULL, 0);
+	dprintk("NFS reply rmdir: %d\n", status);
+	return status;
+}
+
+/*
+ * The READDIR implementation is somewhat hackish - we pass a temporary
+ * buffer to the encode function, which installs it in the receive
+ * the receive iovec. The decode function just parses the reply to make
+ * sure it is syntactically correct; the entries itself are decoded
+ * from nfs_readdir by calling the decode_entry function directly.
+ */
+static int
+nfs_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
+		 u64 cookie, struct page *page, unsigned int count, int plus)
+{
+	struct inode		*dir = dentry->d_inode;
+	struct nfs_readdirargs	arg = {
+		.fh		= NFS_FH(dir),
+		.cookie		= cookie,
+		.count		= count,
+		.pages		= &page
+	};
+	struct rpc_message	msg = {
+		.rpc_proc	= &nfs_procedures[NFSPROC_READDIR],
+		.rpc_argp	= &arg,
+		.rpc_resp	= NULL,
+		.rpc_cred	= cred
+	};
+	int			status;
+
+	lock_kernel();
+
+	dprintk("NFS call  readdir %d\n", (unsigned int)cookie);
+	status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
+
+	dprintk("NFS reply readdir: %d\n", status);
+	unlock_kernel();
+	return status;
+}
+
+static int
+nfs_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
+			struct nfs_fsstat *stat)
+{
+	struct nfs2_fsstat fsinfo;
+	int	status;
+
+	dprintk("NFS call  statfs\n");
+	stat->fattr->valid = 0;
+	status = rpc_call(server->client, NFSPROC_STATFS, fhandle, &fsinfo, 0);
+	dprintk("NFS reply statfs: %d\n", status);
+	if (status)
+		goto out;
+	stat->tbytes = (u64)fsinfo.blocks * fsinfo.bsize;
+	stat->fbytes = (u64)fsinfo.bfree  * fsinfo.bsize;
+	stat->abytes = (u64)fsinfo.bavail * fsinfo.bsize;
+	stat->tfiles = 0;
+	stat->ffiles = 0;
+	stat->afiles = 0;
+out:
+	return status;
+}
+
+static int
+nfs_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
+			struct nfs_fsinfo *info)
+{
+	struct nfs2_fsstat fsinfo;
+	int	status;
+
+	dprintk("NFS call  fsinfo\n");
+	info->fattr->valid = 0;
+	status = rpc_call(server->client, NFSPROC_STATFS, fhandle, &fsinfo, 0);
+	dprintk("NFS reply fsinfo: %d\n", status);
+	if (status)
+		goto out;
+	info->rtmax  = NFS_MAXDATA;
+	info->rtpref = fsinfo.tsize;
+	info->rtmult = fsinfo.bsize;
+	info->wtmax  = NFS_MAXDATA;
+	info->wtpref = fsinfo.tsize;
+	info->wtmult = fsinfo.bsize;
+	info->dtpref = fsinfo.tsize;
+	info->maxfilesize = 0x7FFFFFFF;
+	info->lease_time = 0;
+out:
+	return status;
+}
+
+static int
+nfs_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
+		  struct nfs_pathconf *info)
+{
+	info->max_link = 0;
+	info->max_namelen = NFS2_MAXNAMLEN;
+	return 0;
+}
+
+extern u32 * nfs_decode_dirent(u32 *, struct nfs_entry *, int);
+
+static void
+nfs_read_done(struct rpc_task *task)
+{
+	struct nfs_read_data *data = (struct nfs_read_data *) task->tk_calldata;
+
+	if (task->tk_status >= 0) {
+		nfs_refresh_inode(data->inode, data->res.fattr);
+		/* Emulate the eof flag, which isn't normally needed in NFSv2
+		 * as it is guaranteed to always return the file attributes
+		 */
+		if (data->args.offset + data->args.count >= data->res.fattr->size)
+			data->res.eof = 1;
+	}
+	nfs_readpage_result(task);
+}
+
+static void
+nfs_proc_read_setup(struct nfs_read_data *data)
+{
+	struct rpc_task		*task = &data->task;
+	struct inode		*inode = data->inode;
+	int			flags;
+	struct rpc_message	msg = {
+		.rpc_proc	= &nfs_procedures[NFSPROC_READ],
+		.rpc_argp	= &data->args,
+		.rpc_resp	= &data->res,
+		.rpc_cred	= data->cred,
+	};
+
+	/* N.B. Do we need to test? Never called for swapfile inode */
+	flags = RPC_TASK_ASYNC | (IS_SWAPFILE(inode)? NFS_RPC_SWAPFLAGS : 0);
+
+	/* Finalize the task. */
+	rpc_init_task(task, NFS_CLIENT(inode), nfs_read_done, flags);
+	rpc_call_setup(task, &msg, 0);
+}
+
+static void
+nfs_write_done(struct rpc_task *task)
+{
+	struct nfs_write_data *data = (struct nfs_write_data *) task->tk_calldata;
+
+	if (task->tk_status >= 0)
+		nfs_refresh_inode(data->inode, data->res.fattr);
+	nfs_writeback_done(task);
+}
+
+static void
+nfs_proc_write_setup(struct nfs_write_data *data, int how)
+{
+	struct rpc_task		*task = &data->task;
+	struct inode		*inode = data->inode;
+	int			flags;
+	struct rpc_message	msg = {
+		.rpc_proc	= &nfs_procedures[NFSPROC_WRITE],
+		.rpc_argp	= &data->args,
+		.rpc_resp	= &data->res,
+		.rpc_cred	= data->cred,
+	};
+
+	/* Note: NFSv2 ignores @stable and always uses NFS_FILE_SYNC */
+	data->args.stable = NFS_FILE_SYNC;
+
+	/* Set the initial flags for the task.  */
+	flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC;
+
+	/* Finalize the task. */
+	rpc_init_task(task, NFS_CLIENT(inode), nfs_write_done, flags);
+	rpc_call_setup(task, &msg, 0);
+}
+
+static void
+nfs_proc_commit_setup(struct nfs_write_data *data, int how)
+{
+	BUG();
+}
+
+static int
+nfs_proc_lock(struct file *filp, int cmd, struct file_lock *fl)
+{
+	return nlmclnt_proc(filp->f_dentry->d_inode, cmd, fl);
+}
+
+
+struct nfs_rpc_ops	nfs_v2_clientops = {
+	.version	= 2,		       /* protocol version */
+	.dentry_ops	= &nfs_dentry_operations,
+	.dir_inode_ops	= &nfs_dir_inode_operations,
+	.getroot	= nfs_proc_get_root,
+	.getattr	= nfs_proc_getattr,
+	.setattr	= nfs_proc_setattr,
+	.lookup		= nfs_proc_lookup,
+	.access		= NULL,		       /* access */
+	.readlink	= nfs_proc_readlink,
+	.read		= nfs_proc_read,
+	.write		= nfs_proc_write,
+	.commit		= NULL,		       /* commit */
+	.create		= nfs_proc_create,
+	.remove		= nfs_proc_remove,
+	.unlink_setup	= nfs_proc_unlink_setup,
+	.unlink_done	= nfs_proc_unlink_done,
+	.rename		= nfs_proc_rename,
+	.link		= nfs_proc_link,
+	.symlink	= nfs_proc_symlink,
+	.mkdir		= nfs_proc_mkdir,
+	.rmdir		= nfs_proc_rmdir,
+	.readdir	= nfs_proc_readdir,
+	.mknod		= nfs_proc_mknod,
+	.statfs		= nfs_proc_statfs,
+	.fsinfo		= nfs_proc_fsinfo,
+	.pathconf	= nfs_proc_pathconf,
+	.decode_dirent	= nfs_decode_dirent,
+	.read_setup	= nfs_proc_read_setup,
+	.write_setup	= nfs_proc_write_setup,
+	.commit_setup	= nfs_proc_commit_setup,
+	.file_open	= nfs_open,
+	.file_release	= nfs_release,
+	.lock		= nfs_proc_lock,
+};