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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/cachefiles/xattr.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/cachefiles/xattr.c')
-rw-r--r--ANDROID_3.4.5/fs/cachefiles/xattr.c292
1 files changed, 0 insertions, 292 deletions
diff --git a/ANDROID_3.4.5/fs/cachefiles/xattr.c b/ANDROID_3.4.5/fs/cachefiles/xattr.c
deleted file mode 100644
index e18b183b..00000000
--- a/ANDROID_3.4.5/fs/cachefiles/xattr.c
+++ /dev/null
@@ -1,292 +0,0 @@
-/* CacheFiles extended attribute management
- *
- * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
- * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public Licence
- * as published by the Free Software Foundation; either version
- * 2 of the Licence, or (at your option) any later version.
- */
-
-#include <linux/module.h>
-#include <linux/sched.h>
-#include <linux/file.h>
-#include <linux/fs.h>
-#include <linux/fsnotify.h>
-#include <linux/quotaops.h>
-#include <linux/xattr.h>
-#include <linux/slab.h>
-#include "internal.h"
-
-static const char cachefiles_xattr_cache[] =
- XATTR_USER_PREFIX "CacheFiles.cache";
-
-/*
- * check the type label on an object
- * - done using xattrs
- */
-int cachefiles_check_object_type(struct cachefiles_object *object)
-{
- struct dentry *dentry = object->dentry;
- char type[3], xtype[3];
- int ret;
-
- ASSERT(dentry);
- ASSERT(dentry->d_inode);
-
- if (!object->fscache.cookie)
- strcpy(type, "C3");
- else
- snprintf(type, 3, "%02x", object->fscache.cookie->def->type);
-
- _enter("%p{%s}", object, type);
-
- /* attempt to install a type label directly */
- ret = vfs_setxattr(dentry, cachefiles_xattr_cache, type, 2,
- XATTR_CREATE);
- if (ret == 0) {
- _debug("SET"); /* we succeeded */
- goto error;
- }
-
- if (ret != -EEXIST) {
- kerror("Can't set xattr on %*.*s [%lu] (err %d)",
- dentry->d_name.len, dentry->d_name.len,
- dentry->d_name.name, dentry->d_inode->i_ino,
- -ret);
- goto error;
- }
-
- /* read the current type label */
- ret = vfs_getxattr(dentry, cachefiles_xattr_cache, xtype, 3);
- if (ret < 0) {
- if (ret == -ERANGE)
- goto bad_type_length;
-
- kerror("Can't read xattr on %*.*s [%lu] (err %d)",
- dentry->d_name.len, dentry->d_name.len,
- dentry->d_name.name, dentry->d_inode->i_ino,
- -ret);
- goto error;
- }
-
- /* check the type is what we're expecting */
- if (ret != 2)
- goto bad_type_length;
-
- if (xtype[0] != type[0] || xtype[1] != type[1])
- goto bad_type;
-
- ret = 0;
-
-error:
- _leave(" = %d", ret);
- return ret;
-
-bad_type_length:
- kerror("Cache object %lu type xattr length incorrect",
- dentry->d_inode->i_ino);
- ret = -EIO;
- goto error;
-
-bad_type:
- xtype[2] = 0;
- kerror("Cache object %*.*s [%lu] type %s not %s",
- dentry->d_name.len, dentry->d_name.len,
- dentry->d_name.name, dentry->d_inode->i_ino,
- xtype, type);
- ret = -EIO;
- goto error;
-}
-
-/*
- * set the state xattr on a cache file
- */
-int cachefiles_set_object_xattr(struct cachefiles_object *object,
- struct cachefiles_xattr *auxdata)
-{
- struct dentry *dentry = object->dentry;
- int ret;
-
- ASSERT(object->fscache.cookie);
- ASSERT(dentry);
-
- _enter("%p,#%d", object, auxdata->len);
-
- /* attempt to install the cache metadata directly */
- _debug("SET %s #%u", object->fscache.cookie->def->name, auxdata->len);
-
- ret = vfs_setxattr(dentry, cachefiles_xattr_cache,
- &auxdata->type, auxdata->len,
- XATTR_CREATE);
- if (ret < 0 && ret != -ENOMEM)
- cachefiles_io_error_obj(
- object,
- "Failed to set xattr with error %d", ret);
-
- _leave(" = %d", ret);
- return ret;
-}
-
-/*
- * update the state xattr on a cache file
- */
-int cachefiles_update_object_xattr(struct cachefiles_object *object,
- struct cachefiles_xattr *auxdata)
-{
- struct dentry *dentry = object->dentry;
- int ret;
-
- ASSERT(object->fscache.cookie);
- ASSERT(dentry);
-
- _enter("%p,#%d", object, auxdata->len);
-
- /* attempt to install the cache metadata directly */
- _debug("SET %s #%u", object->fscache.cookie->def->name, auxdata->len);
-
- ret = vfs_setxattr(dentry, cachefiles_xattr_cache,
- &auxdata->type, auxdata->len,
- XATTR_REPLACE);
- if (ret < 0 && ret != -ENOMEM)
- cachefiles_io_error_obj(
- object,
- "Failed to update xattr with error %d", ret);
-
- _leave(" = %d", ret);
- return ret;
-}
-
-/*
- * check the state xattr on a cache file
- * - return -ESTALE if the object should be deleted
- */
-int cachefiles_check_object_xattr(struct cachefiles_object *object,
- struct cachefiles_xattr *auxdata)
-{
- struct cachefiles_xattr *auxbuf;
- struct dentry *dentry = object->dentry;
- int ret;
-
- _enter("%p,#%d", object, auxdata->len);
-
- ASSERT(dentry);
- ASSERT(dentry->d_inode);
-
- auxbuf = kmalloc(sizeof(struct cachefiles_xattr) + 512, GFP_KERNEL);
- if (!auxbuf) {
- _leave(" = -ENOMEM");
- return -ENOMEM;
- }
-
- /* read the current type label */
- ret = vfs_getxattr(dentry, cachefiles_xattr_cache,
- &auxbuf->type, 512 + 1);
- if (ret < 0) {
- if (ret == -ENODATA)
- goto stale; /* no attribute - power went off
- * mid-cull? */
-
- if (ret == -ERANGE)
- goto bad_type_length;
-
- cachefiles_io_error_obj(object,
- "Can't read xattr on %lu (err %d)",
- dentry->d_inode->i_ino, -ret);
- goto error;
- }
-
- /* check the on-disk object */
- if (ret < 1)
- goto bad_type_length;
-
- if (auxbuf->type != auxdata->type)
- goto stale;
-
- auxbuf->len = ret;
-
- /* consult the netfs */
- if (object->fscache.cookie->def->check_aux) {
- enum fscache_checkaux result;
- unsigned int dlen;
-
- dlen = auxbuf->len - 1;
-
- _debug("checkaux %s #%u",
- object->fscache.cookie->def->name, dlen);
-
- result = fscache_check_aux(&object->fscache,
- &auxbuf->data, dlen);
-
- switch (result) {
- /* entry okay as is */
- case FSCACHE_CHECKAUX_OKAY:
- goto okay;
-
- /* entry requires update */
- case FSCACHE_CHECKAUX_NEEDS_UPDATE:
- break;
-
- /* entry requires deletion */
- case FSCACHE_CHECKAUX_OBSOLETE:
- goto stale;
-
- default:
- BUG();
- }
-
- /* update the current label */
- ret = vfs_setxattr(dentry, cachefiles_xattr_cache,
- &auxdata->type, auxdata->len,
- XATTR_REPLACE);
- if (ret < 0) {
- cachefiles_io_error_obj(object,
- "Can't update xattr on %lu"
- " (error %d)",
- dentry->d_inode->i_ino, -ret);
- goto error;
- }
- }
-
-okay:
- ret = 0;
-
-error:
- kfree(auxbuf);
- _leave(" = %d", ret);
- return ret;
-
-bad_type_length:
- kerror("Cache object %lu xattr length incorrect",
- dentry->d_inode->i_ino);
- ret = -EIO;
- goto error;
-
-stale:
- ret = -ESTALE;
- goto error;
-}
-
-/*
- * remove the object's xattr to mark it stale
- */
-int cachefiles_remove_object_xattr(struct cachefiles_cache *cache,
- struct dentry *dentry)
-{
- int ret;
-
- ret = vfs_removexattr(dentry, cachefiles_xattr_cache);
- if (ret < 0) {
- if (ret == -ENOENT || ret == -ENODATA)
- ret = 0;
- else if (ret != -ENOMEM)
- cachefiles_io_error(cache,
- "Can't remove xattr from %lu"
- " (error %d)",
- dentry->d_inode->i_ino, -ret);
- }
-
- _leave(" = %d", ret);
- return ret;
-}