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authorSrikant Patnaik2015-01-11 12:28:04 +0530
committerSrikant Patnaik2015-01-11 12:28:04 +0530
commit871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch)
tree8718f573808810c2a1e8cb8fb6ac469093ca2784 /ANDROID_3.4.5/fs/nfs/nfs4namespace.c
parent9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff)
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Moved, renamed, and deleted files
The original directory structure was scattered and unorganized. Changes are basically to make it look like kernel structure.
Diffstat (limited to 'ANDROID_3.4.5/fs/nfs/nfs4namespace.c')
-rw-r--r--ANDROID_3.4.5/fs/nfs/nfs4namespace.c343
1 files changed, 0 insertions, 343 deletions
diff --git a/ANDROID_3.4.5/fs/nfs/nfs4namespace.c b/ANDROID_3.4.5/fs/nfs/nfs4namespace.c
deleted file mode 100644
index a7f3dedc..00000000
--- a/ANDROID_3.4.5/fs/nfs/nfs4namespace.c
+++ /dev/null
@@ -1,343 +0,0 @@
-/*
- * linux/fs/nfs/nfs4namespace.c
- *
- * Copyright (C) 2005 Trond Myklebust <Trond.Myklebust@netapp.com>
- * - Modified by David Howells <dhowells@redhat.com>
- *
- * NFSv4 namespace
- */
-
-#include <linux/dcache.h>
-#include <linux/mount.h>
-#include <linux/namei.h>
-#include <linux/nfs_fs.h>
-#include <linux/slab.h>
-#include <linux/string.h>
-#include <linux/sunrpc/clnt.h>
-#include <linux/vfs.h>
-#include <linux/inet.h>
-#include "internal.h"
-#include "nfs4_fs.h"
-#include "dns_resolve.h"
-
-#define NFSDBG_FACILITY NFSDBG_VFS
-
-/*
- * Convert the NFSv4 pathname components into a standard posix path.
- *
- * Note that the resulting string will be placed at the end of the buffer
- */
-static inline char *nfs4_pathname_string(const struct nfs4_pathname *pathname,
- char *buffer, ssize_t buflen)
-{
- char *end = buffer + buflen;
- int n;
-
- *--end = '\0';
- buflen--;
-
- n = pathname->ncomponents;
- while (--n >= 0) {
- const struct nfs4_string *component = &pathname->components[n];
- buflen -= component->len + 1;
- if (buflen < 0)
- goto Elong;
- end -= component->len;
- memcpy(end, component->data, component->len);
- *--end = '/';
- }
- return end;
-Elong:
- return ERR_PTR(-ENAMETOOLONG);
-}
-
-/*
- * return the path component of "<server>:<path>"
- * nfspath - the "<server>:<path>" string
- * end - one past the last char that could contain "<server>:"
- * returns NULL on failure
- */
-static char *nfs_path_component(const char *nfspath, const char *end)
-{
- char *p;
-
- if (*nfspath == '[') {
- /* parse [] escaped IPv6 addrs */
- p = strchr(nfspath, ']');
- if (p != NULL && ++p < end && *p == ':')
- return p + 1;
- } else {
- /* otherwise split on first colon */
- p = strchr(nfspath, ':');
- if (p != NULL && p < end)
- return p + 1;
- }
- return NULL;
-}
-
-/*
- * Determine the mount path as a string
- */
-static char *nfs4_path(struct dentry *dentry, char *buffer, ssize_t buflen)
-{
- char *limit;
- char *path = nfs_path(&limit, dentry, buffer, buflen);
- if (!IS_ERR(path)) {
- char *path_component = nfs_path_component(path, limit);
- if (path_component)
- return path_component;
- }
- return path;
-}
-
-/*
- * Check that fs_locations::fs_root [RFC3530 6.3] is a prefix for what we
- * believe to be the server path to this dentry
- */
-static int nfs4_validate_fspath(struct dentry *dentry,
- const struct nfs4_fs_locations *locations,
- char *page, char *page2)
-{
- const char *path, *fs_path;
-
- path = nfs4_path(dentry, page, PAGE_SIZE);
- if (IS_ERR(path))
- return PTR_ERR(path);
-
- fs_path = nfs4_pathname_string(&locations->fs_path, page2, PAGE_SIZE);
- if (IS_ERR(fs_path))
- return PTR_ERR(fs_path);
-
- if (strncmp(path, fs_path, strlen(fs_path)) != 0) {
- dprintk("%s: path %s does not begin with fsroot %s\n",
- __func__, path, fs_path);
- return -ENOENT;
- }
-
- return 0;
-}
-
-static size_t nfs_parse_server_name(char *string, size_t len,
- struct sockaddr *sa, size_t salen, struct nfs_server *server)
-{
- struct net *net = rpc_net_ns(server->client);
- ssize_t ret;
-
- ret = rpc_pton(net, string, len, sa, salen);
- if (ret == 0) {
- ret = nfs_dns_resolve_name(net, string, len, sa, salen);
- if (ret < 0)
- ret = 0;
- }
- return ret;
-}
-
-static rpc_authflavor_t nfs4_negotiate_security(struct inode *inode, struct qstr *name)
-{
- struct page *page;
- struct nfs4_secinfo_flavors *flavors;
- rpc_authflavor_t flavor;
- int err;
-
- page = alloc_page(GFP_KERNEL);
- if (!page)
- return -ENOMEM;
- flavors = page_address(page);
-
- err = nfs4_proc_secinfo(inode, name, flavors);
- if (err < 0) {
- flavor = err;
- goto out;
- }
-
- flavor = nfs_find_best_sec(flavors);
-
-out:
- put_page(page);
- return flavor;
-}
-
-/*
- * Please call rpc_shutdown_client() when you are done with this client.
- */
-struct rpc_clnt *nfs4_create_sec_client(struct rpc_clnt *clnt, struct inode *inode,
- struct qstr *name)
-{
- struct rpc_clnt *clone;
- struct rpc_auth *auth;
- rpc_authflavor_t flavor;
-
- flavor = nfs4_negotiate_security(inode, name);
- if (flavor < 0)
- return ERR_PTR(flavor);
-
- clone = rpc_clone_client(clnt);
- if (IS_ERR(clone))
- return clone;
-
- auth = rpcauth_create(flavor, clone);
- if (!auth) {
- rpc_shutdown_client(clone);
- clone = ERR_PTR(-EIO);
- }
-
- return clone;
-}
-
-static struct vfsmount *try_location(struct nfs_clone_mount *mountdata,
- char *page, char *page2,
- const struct nfs4_fs_location *location)
-{
- const size_t addr_bufsize = sizeof(struct sockaddr_storage);
- struct vfsmount *mnt = ERR_PTR(-ENOENT);
- char *mnt_path;
- unsigned int maxbuflen;
- unsigned int s;
-
- mnt_path = nfs4_pathname_string(&location->rootpath, page2, PAGE_SIZE);
- if (IS_ERR(mnt_path))
- return ERR_CAST(mnt_path);
- mountdata->mnt_path = mnt_path;
- maxbuflen = mnt_path - 1 - page2;
-
- mountdata->addr = kmalloc(addr_bufsize, GFP_KERNEL);
- if (mountdata->addr == NULL)
- return ERR_PTR(-ENOMEM);
-
- for (s = 0; s < location->nservers; s++) {
- const struct nfs4_string *buf = &location->servers[s];
-
- if (buf->len <= 0 || buf->len >= maxbuflen)
- continue;
-
- if (memchr(buf->data, IPV6_SCOPE_DELIMITER, buf->len))
- continue;
-
- mountdata->addrlen = nfs_parse_server_name(buf->data, buf->len,
- mountdata->addr, addr_bufsize,
- NFS_SB(mountdata->sb));
- if (mountdata->addrlen == 0)
- continue;
-
- rpc_set_port(mountdata->addr, NFS_PORT);
-
- memcpy(page2, buf->data, buf->len);
- page2[buf->len] = '\0';
- mountdata->hostname = page2;
-
- snprintf(page, PAGE_SIZE, "%s:%s",
- mountdata->hostname,
- mountdata->mnt_path);
-
- mnt = vfs_kern_mount(&nfs4_referral_fs_type, 0, page, mountdata);
- if (!IS_ERR(mnt))
- break;
- }
- kfree(mountdata->addr);
- return mnt;
-}
-
-/**
- * nfs_follow_referral - set up mountpoint when hitting a referral on moved error
- * @dentry - parent directory
- * @locations - array of NFSv4 server location information
- *
- */
-static struct vfsmount *nfs_follow_referral(struct dentry *dentry,
- const struct nfs4_fs_locations *locations)
-{
- struct vfsmount *mnt = ERR_PTR(-ENOENT);
- struct nfs_clone_mount mountdata = {
- .sb = dentry->d_sb,
- .dentry = dentry,
- .authflavor = NFS_SB(dentry->d_sb)->client->cl_auth->au_flavor,
- };
- char *page = NULL, *page2 = NULL;
- int loc, error;
-
- if (locations == NULL || locations->nlocations <= 0)
- goto out;
-
- dprintk("%s: referral at %s/%s\n", __func__,
- dentry->d_parent->d_name.name, dentry->d_name.name);
-
- page = (char *) __get_free_page(GFP_USER);
- if (!page)
- goto out;
-
- page2 = (char *) __get_free_page(GFP_USER);
- if (!page2)
- goto out;
-
- /* Ensure fs path is a prefix of current dentry path */
- error = nfs4_validate_fspath(dentry, locations, page, page2);
- if (error < 0) {
- mnt = ERR_PTR(error);
- goto out;
- }
-
- for (loc = 0; loc < locations->nlocations; loc++) {
- const struct nfs4_fs_location *location = &locations->locations[loc];
-
- if (location == NULL || location->nservers <= 0 ||
- location->rootpath.ncomponents == 0)
- continue;
-
- mnt = try_location(&mountdata, page, page2, location);
- if (!IS_ERR(mnt))
- break;
- }
-
-out:
- free_page((unsigned long) page);
- free_page((unsigned long) page2);
- dprintk("%s: done\n", __func__);
- return mnt;
-}
-
-/*
- * nfs_do_refmount - handle crossing a referral on server
- * @dentry - dentry of referral
- *
- */
-struct vfsmount *nfs_do_refmount(struct rpc_clnt *client, struct dentry *dentry)
-{
- struct vfsmount *mnt = ERR_PTR(-ENOMEM);
- struct dentry *parent;
- struct nfs4_fs_locations *fs_locations = NULL;
- struct page *page;
- int err;
-
- /* BUG_ON(IS_ROOT(dentry)); */
- dprintk("%s: enter\n", __func__);
-
- page = alloc_page(GFP_KERNEL);
- if (page == NULL)
- goto out;
-
- fs_locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
- if (fs_locations == NULL)
- goto out_free;
-
- /* Get locations */
- mnt = ERR_PTR(-ENOENT);
-
- parent = dget_parent(dentry);
- dprintk("%s: getting locations for %s/%s\n",
- __func__, parent->d_name.name, dentry->d_name.name);
-
- err = nfs4_proc_fs_locations(client, parent->d_inode, &dentry->d_name, fs_locations, page);
- dput(parent);
- if (err != 0 ||
- fs_locations->nlocations <= 0 ||
- fs_locations->fs_path.ncomponents <= 0)
- goto out_free;
-
- mnt = nfs_follow_referral(dentry, fs_locations);
-out_free:
- __free_page(page);
- kfree(fs_locations);
-out:
- dprintk("%s: done\n", __func__);
- return mnt;
-}