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Diffstat (limited to 'ANDROID_3.4.5/fs/9p/v9fs.c')
-rw-r--r--ANDROID_3.4.5/fs/9p/v9fs.c644
1 files changed, 0 insertions, 644 deletions
diff --git a/ANDROID_3.4.5/fs/9p/v9fs.c b/ANDROID_3.4.5/fs/9p/v9fs.c
deleted file mode 100644
index b85efa77..00000000
--- a/ANDROID_3.4.5/fs/9p/v9fs.c
+++ /dev/null
@@ -1,644 +0,0 @@
-/*
- * linux/fs/9p/v9fs.c
- *
- * This file contains functions assisting in mapping VFS to 9P2000
- *
- * Copyright (C) 2004-2008 by Eric Van Hensbergen <ericvh@gmail.com>
- * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2
- * as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to:
- * Free Software Foundation
- * 51 Franklin Street, Fifth Floor
- * Boston, MA 02111-1301 USA
- *
- */
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/module.h>
-#include <linux/errno.h>
-#include <linux/fs.h>
-#include <linux/sched.h>
-#include <linux/parser.h>
-#include <linux/idr.h>
-#include <linux/slab.h>
-#include <net/9p/9p.h>
-#include <net/9p/client.h>
-#include <net/9p/transport.h>
-#include "v9fs.h"
-#include "v9fs_vfs.h"
-#include "cache.h"
-
-static DEFINE_SPINLOCK(v9fs_sessionlist_lock);
-static LIST_HEAD(v9fs_sessionlist);
-struct kmem_cache *v9fs_inode_cache;
-
-/*
- * Option Parsing (code inspired by NFS code)
- * NOTE: each transport will parse its own options
- */
-
-enum {
- /* Options that take integer arguments */
- Opt_debug, Opt_dfltuid, Opt_dfltgid, Opt_afid,
- /* String options */
- Opt_uname, Opt_remotename, Opt_trans, Opt_cache, Opt_cachetag,
- /* Options that take no arguments */
- Opt_nodevmap,
- /* Cache options */
- Opt_cache_loose, Opt_fscache,
- /* Access options */
- Opt_access, Opt_posixacl,
- /* Error token */
- Opt_err
-};
-
-static const match_table_t tokens = {
- {Opt_debug, "debug=%x"},
- {Opt_dfltuid, "dfltuid=%u"},
- {Opt_dfltgid, "dfltgid=%u"},
- {Opt_afid, "afid=%u"},
- {Opt_uname, "uname=%s"},
- {Opt_remotename, "aname=%s"},
- {Opt_nodevmap, "nodevmap"},
- {Opt_cache, "cache=%s"},
- {Opt_cache_loose, "loose"},
- {Opt_fscache, "fscache"},
- {Opt_cachetag, "cachetag=%s"},
- {Opt_access, "access=%s"},
- {Opt_posixacl, "posixacl"},
- {Opt_err, NULL}
-};
-
-/* Interpret mount options for cache mode */
-static int get_cache_mode(char *s)
-{
- int version = -EINVAL;
-
- if (!strcmp(s, "loose")) {
- version = CACHE_LOOSE;
- p9_debug(P9_DEBUG_9P, "Cache mode: loose\n");
- } else if (!strcmp(s, "fscache")) {
- version = CACHE_FSCACHE;
- p9_debug(P9_DEBUG_9P, "Cache mode: fscache\n");
- } else if (!strcmp(s, "none")) {
- version = CACHE_NONE;
- p9_debug(P9_DEBUG_9P, "Cache mode: none\n");
- } else
- pr_info("Unknown Cache mode %s\n", s);
- return version;
-}
-
-/**
- * v9fs_parse_options - parse mount options into session structure
- * @v9ses: existing v9fs session information
- *
- * Return 0 upon success, -ERRNO upon failure.
- */
-
-static int v9fs_parse_options(struct v9fs_session_info *v9ses, char *opts)
-{
- char *options, *tmp_options;
- substring_t args[MAX_OPT_ARGS];
- char *p;
- int option = 0;
- char *s, *e;
- int ret = 0;
-
- /* setup defaults */
- v9ses->afid = ~0;
- v9ses->debug = 0;
- v9ses->cache = CACHE_NONE;
-#ifdef CONFIG_9P_FSCACHE
- v9ses->cachetag = NULL;
-#endif
-
- if (!opts)
- return 0;
-
- tmp_options = kstrdup(opts, GFP_KERNEL);
- if (!tmp_options) {
- ret = -ENOMEM;
- goto fail_option_alloc;
- }
- options = tmp_options;
-
- while ((p = strsep(&options, ",")) != NULL) {
- int token, r;
- if (!*p)
- continue;
- token = match_token(p, tokens, args);
- switch (token) {
- case Opt_debug:
- r = match_int(&args[0], &option);
- if (r < 0) {
- p9_debug(P9_DEBUG_ERROR,
- "integer field, but no integer?\n");
- ret = r;
- continue;
- }
- v9ses->debug = option;
-#ifdef CONFIG_NET_9P_DEBUG
- p9_debug_level = option;
-#endif
- break;
-
- case Opt_dfltuid:
- r = match_int(&args[0], &option);
- if (r < 0) {
- p9_debug(P9_DEBUG_ERROR,
- "integer field, but no integer?\n");
- ret = r;
- continue;
- }
- v9ses->dfltuid = option;
- break;
- case Opt_dfltgid:
- r = match_int(&args[0], &option);
- if (r < 0) {
- p9_debug(P9_DEBUG_ERROR,
- "integer field, but no integer?\n");
- ret = r;
- continue;
- }
- v9ses->dfltgid = option;
- break;
- case Opt_afid:
- r = match_int(&args[0], &option);
- if (r < 0) {
- p9_debug(P9_DEBUG_ERROR,
- "integer field, but no integer?\n");
- ret = r;
- continue;
- }
- v9ses->afid = option;
- break;
- case Opt_uname:
- match_strlcpy(v9ses->uname, &args[0], PATH_MAX);
- break;
- case Opt_remotename:
- match_strlcpy(v9ses->aname, &args[0], PATH_MAX);
- break;
- case Opt_nodevmap:
- v9ses->nodev = 1;
- break;
- case Opt_cache_loose:
- v9ses->cache = CACHE_LOOSE;
- break;
- case Opt_fscache:
- v9ses->cache = CACHE_FSCACHE;
- break;
- case Opt_cachetag:
-#ifdef CONFIG_9P_FSCACHE
- v9ses->cachetag = match_strdup(&args[0]);
-#endif
- break;
- case Opt_cache:
- s = match_strdup(&args[0]);
- if (!s) {
- ret = -ENOMEM;
- p9_debug(P9_DEBUG_ERROR,
- "problem allocating copy of cache arg\n");
- goto free_and_return;
- }
- ret = get_cache_mode(s);
- if (ret == -EINVAL) {
- kfree(s);
- goto free_and_return;
- }
-
- v9ses->cache = ret;
- kfree(s);
- break;
-
- case Opt_access:
- s = match_strdup(&args[0]);
- if (!s) {
- ret = -ENOMEM;
- p9_debug(P9_DEBUG_ERROR,
- "problem allocating copy of access arg\n");
- goto free_and_return;
- }
-
- v9ses->flags &= ~V9FS_ACCESS_MASK;
- if (strcmp(s, "user") == 0)
- v9ses->flags |= V9FS_ACCESS_USER;
- else if (strcmp(s, "any") == 0)
- v9ses->flags |= V9FS_ACCESS_ANY;
- else if (strcmp(s, "client") == 0) {
- v9ses->flags |= V9FS_ACCESS_CLIENT;
- } else {
- v9ses->flags |= V9FS_ACCESS_SINGLE;
- v9ses->uid = simple_strtoul(s, &e, 10);
- if (*e != '\0') {
- ret = -EINVAL;
- pr_info("Unknown access argument %s\n",
- s);
- kfree(s);
- goto free_and_return;
- }
- }
-
- kfree(s);
- break;
-
- case Opt_posixacl:
-#ifdef CONFIG_9P_FS_POSIX_ACL
- v9ses->flags |= V9FS_POSIX_ACL;
-#else
- p9_debug(P9_DEBUG_ERROR,
- "Not defined CONFIG_9P_FS_POSIX_ACL. Ignoring posixacl option\n");
-#endif
- break;
-
- default:
- continue;
- }
- }
-
-free_and_return:
- kfree(tmp_options);
-fail_option_alloc:
- return ret;
-}
-
-/**
- * v9fs_session_init - initialize session
- * @v9ses: session information structure
- * @dev_name: device being mounted
- * @data: options
- *
- */
-
-struct p9_fid *v9fs_session_init(struct v9fs_session_info *v9ses,
- const char *dev_name, char *data)
-{
- int retval = -EINVAL;
- struct p9_fid *fid;
- int rc;
-
- v9ses->uname = __getname();
- if (!v9ses->uname)
- return ERR_PTR(-ENOMEM);
-
- v9ses->aname = __getname();
- if (!v9ses->aname) {
- __putname(v9ses->uname);
- return ERR_PTR(-ENOMEM);
- }
- init_rwsem(&v9ses->rename_sem);
-
- rc = bdi_setup_and_register(&v9ses->bdi, "9p", BDI_CAP_MAP_COPY);
- if (rc) {
- __putname(v9ses->aname);
- __putname(v9ses->uname);
- return ERR_PTR(rc);
- }
-
- spin_lock(&v9fs_sessionlist_lock);
- list_add(&v9ses->slist, &v9fs_sessionlist);
- spin_unlock(&v9fs_sessionlist_lock);
-
- strcpy(v9ses->uname, V9FS_DEFUSER);
- strcpy(v9ses->aname, V9FS_DEFANAME);
- v9ses->uid = ~0;
- v9ses->dfltuid = V9FS_DEFUID;
- v9ses->dfltgid = V9FS_DEFGID;
-
- v9ses->clnt = p9_client_create(dev_name, data);
- if (IS_ERR(v9ses->clnt)) {
- retval = PTR_ERR(v9ses->clnt);
- v9ses->clnt = NULL;
- p9_debug(P9_DEBUG_ERROR, "problem initializing 9p client\n");
- goto error;
- }
-
- v9ses->flags = V9FS_ACCESS_USER;
-
- if (p9_is_proto_dotl(v9ses->clnt)) {
- v9ses->flags = V9FS_ACCESS_CLIENT;
- v9ses->flags |= V9FS_PROTO_2000L;
- } else if (p9_is_proto_dotu(v9ses->clnt)) {
- v9ses->flags |= V9FS_PROTO_2000U;
- }
-
- rc = v9fs_parse_options(v9ses, data);
- if (rc < 0) {
- retval = rc;
- goto error;
- }
-
- v9ses->maxdata = v9ses->clnt->msize - P9_IOHDRSZ;
-
- if (!v9fs_proto_dotl(v9ses) &&
- ((v9ses->flags & V9FS_ACCESS_MASK) == V9FS_ACCESS_CLIENT)) {
- /*
- * We support ACCESS_CLIENT only for dotl.
- * Fall back to ACCESS_USER
- */
- v9ses->flags &= ~V9FS_ACCESS_MASK;
- v9ses->flags |= V9FS_ACCESS_USER;
- }
- /*FIXME !! */
- /* for legacy mode, fall back to V9FS_ACCESS_ANY */
- if (!(v9fs_proto_dotu(v9ses) || v9fs_proto_dotl(v9ses)) &&
- ((v9ses->flags&V9FS_ACCESS_MASK) == V9FS_ACCESS_USER)) {
-
- v9ses->flags &= ~V9FS_ACCESS_MASK;
- v9ses->flags |= V9FS_ACCESS_ANY;
- v9ses->uid = ~0;
- }
- if (!v9fs_proto_dotl(v9ses) ||
- !((v9ses->flags & V9FS_ACCESS_MASK) == V9FS_ACCESS_CLIENT)) {
- /*
- * We support ACL checks on clinet only if the protocol is
- * 9P2000.L and access is V9FS_ACCESS_CLIENT.
- */
- v9ses->flags &= ~V9FS_ACL_MASK;
- }
-
- fid = p9_client_attach(v9ses->clnt, NULL, v9ses->uname, ~0,
- v9ses->aname);
- if (IS_ERR(fid)) {
- retval = PTR_ERR(fid);
- fid = NULL;
- p9_debug(P9_DEBUG_ERROR, "cannot attach\n");
- goto error;
- }
-
- if ((v9ses->flags & V9FS_ACCESS_MASK) == V9FS_ACCESS_SINGLE)
- fid->uid = v9ses->uid;
- else
- fid->uid = ~0;
-
-#ifdef CONFIG_9P_FSCACHE
- /* register the session for caching */
- v9fs_cache_session_get_cookie(v9ses);
-#endif
-
- return fid;
-
-error:
- bdi_destroy(&v9ses->bdi);
- return ERR_PTR(retval);
-}
-
-/**
- * v9fs_session_close - shutdown a session
- * @v9ses: session information structure
- *
- */
-
-void v9fs_session_close(struct v9fs_session_info *v9ses)
-{
- if (v9ses->clnt) {
- p9_client_destroy(v9ses->clnt);
- v9ses->clnt = NULL;
- }
-
-#ifdef CONFIG_9P_FSCACHE
- if (v9ses->fscache) {
- v9fs_cache_session_put_cookie(v9ses);
- kfree(v9ses->cachetag);
- }
-#endif
- __putname(v9ses->uname);
- __putname(v9ses->aname);
-
- bdi_destroy(&v9ses->bdi);
-
- spin_lock(&v9fs_sessionlist_lock);
- list_del(&v9ses->slist);
- spin_unlock(&v9fs_sessionlist_lock);
-}
-
-/**
- * v9fs_session_cancel - terminate a session
- * @v9ses: session to terminate
- *
- * mark transport as disconnected and cancel all pending requests.
- */
-
-void v9fs_session_cancel(struct v9fs_session_info *v9ses) {
- p9_debug(P9_DEBUG_ERROR, "cancel session %p\n", v9ses);
- p9_client_disconnect(v9ses->clnt);
-}
-
-/**
- * v9fs_session_begin_cancel - Begin terminate of a session
- * @v9ses: session to terminate
- *
- * After this call we don't allow any request other than clunk.
- */
-
-void v9fs_session_begin_cancel(struct v9fs_session_info *v9ses)
-{
- p9_debug(P9_DEBUG_ERROR, "begin cancel session %p\n", v9ses);
- p9_client_begin_disconnect(v9ses->clnt);
-}
-
-extern int v9fs_error_init(void);
-
-static struct kobject *v9fs_kobj;
-
-#ifdef CONFIG_9P_FSCACHE
-/**
- * caches_show - list caches associated with a session
- *
- * Returns the size of buffer written.
- */
-
-static ssize_t caches_show(struct kobject *kobj,
- struct kobj_attribute *attr,
- char *buf)
-{
- ssize_t n = 0, count = 0, limit = PAGE_SIZE;
- struct v9fs_session_info *v9ses;
-
- spin_lock(&v9fs_sessionlist_lock);
- list_for_each_entry(v9ses, &v9fs_sessionlist, slist) {
- if (v9ses->cachetag) {
- n = snprintf(buf, limit, "%s\n", v9ses->cachetag);
- if (n < 0) {
- count = n;
- break;
- }
-
- count += n;
- limit -= n;
- }
- }
-
- spin_unlock(&v9fs_sessionlist_lock);
- return count;
-}
-
-static struct kobj_attribute v9fs_attr_cache = __ATTR_RO(caches);
-#endif /* CONFIG_9P_FSCACHE */
-
-static struct attribute *v9fs_attrs[] = {
-#ifdef CONFIG_9P_FSCACHE
- &v9fs_attr_cache.attr,
-#endif
- NULL,
-};
-
-static struct attribute_group v9fs_attr_group = {
- .attrs = v9fs_attrs,
-};
-
-/**
- * v9fs_sysfs_init - Initialize the v9fs sysfs interface
- *
- */
-
-static int v9fs_sysfs_init(void)
-{
- v9fs_kobj = kobject_create_and_add("9p", fs_kobj);
- if (!v9fs_kobj)
- return -ENOMEM;
-
- if (sysfs_create_group(v9fs_kobj, &v9fs_attr_group)) {
- kobject_put(v9fs_kobj);
- return -ENOMEM;
- }
-
- return 0;
-}
-
-/**
- * v9fs_sysfs_cleanup - Unregister the v9fs sysfs interface
- *
- */
-
-static void v9fs_sysfs_cleanup(void)
-{
- sysfs_remove_group(v9fs_kobj, &v9fs_attr_group);
- kobject_put(v9fs_kobj);
-}
-
-static void v9fs_inode_init_once(void *foo)
-{
- struct v9fs_inode *v9inode = (struct v9fs_inode *)foo;
-#ifdef CONFIG_9P_FSCACHE
- v9inode->fscache = NULL;
-#endif
- memset(&v9inode->qid, 0, sizeof(v9inode->qid));
- inode_init_once(&v9inode->vfs_inode);
-}
-
-/**
- * v9fs_init_inode_cache - initialize a cache for 9P
- * Returns 0 on success.
- */
-static int v9fs_init_inode_cache(void)
-{
- v9fs_inode_cache = kmem_cache_create("v9fs_inode_cache",
- sizeof(struct v9fs_inode),
- 0, (SLAB_RECLAIM_ACCOUNT|
- SLAB_MEM_SPREAD),
- v9fs_inode_init_once);
- if (!v9fs_inode_cache)
- return -ENOMEM;
-
- return 0;
-}
-
-/**
- * v9fs_destroy_inode_cache - destroy the cache of 9P inode
- *
- */
-static void v9fs_destroy_inode_cache(void)
-{
- kmem_cache_destroy(v9fs_inode_cache);
-}
-
-static int v9fs_cache_register(void)
-{
- int ret;
- ret = v9fs_init_inode_cache();
- if (ret < 0)
- return ret;
-#ifdef CONFIG_9P_FSCACHE
- return fscache_register_netfs(&v9fs_cache_netfs);
-#else
- return ret;
-#endif
-}
-
-static void v9fs_cache_unregister(void)
-{
- v9fs_destroy_inode_cache();
-#ifdef CONFIG_9P_FSCACHE
- fscache_unregister_netfs(&v9fs_cache_netfs);
-#endif
-}
-
-/**
- * init_v9fs - Initialize module
- *
- */
-
-static int __init init_v9fs(void)
-{
- int err;
- pr_info("Installing v9fs 9p2000 file system support\n");
- /* TODO: Setup list of registered trasnport modules */
-
- err = v9fs_cache_register();
- if (err < 0) {
- pr_err("Failed to register v9fs for caching\n");
- return err;
- }
-
- err = v9fs_sysfs_init();
- if (err < 0) {
- pr_err("Failed to register with sysfs\n");
- goto out_cache;
- }
- err = register_filesystem(&v9fs_fs_type);
- if (err < 0) {
- pr_err("Failed to register filesystem\n");
- goto out_sysfs_cleanup;
- }
-
- return 0;
-
-out_sysfs_cleanup:
- v9fs_sysfs_cleanup();
-
-out_cache:
- v9fs_cache_unregister();
-
- return err;
-}
-
-/**
- * exit_v9fs - shutdown module
- *
- */
-
-static void __exit exit_v9fs(void)
-{
- v9fs_sysfs_cleanup();
- v9fs_cache_unregister();
- unregister_filesystem(&v9fs_fs_type);
-}
-
-module_init(init_v9fs)
-module_exit(exit_v9fs)
-
-MODULE_AUTHOR("Latchesar Ionkov <lucho@ionkov.net>");
-MODULE_AUTHOR("Eric Van Hensbergen <ericvh@gmail.com>");
-MODULE_AUTHOR("Ron Minnich <rminnich@lanl.gov>");
-MODULE_LICENSE("GPL");
generated by cgit (git 2.34.1) at 2025-01-23 22:14:12 +0000