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Diffstat (limited to 'ANDROID_3.4.5/fs/9p/acl.c')
-rw-r--r--ANDROID_3.4.5/fs/9p/acl.c380
1 files changed, 0 insertions, 380 deletions
diff --git a/ANDROID_3.4.5/fs/9p/acl.c b/ANDROID_3.4.5/fs/9p/acl.c
deleted file mode 100644
index 9a1d4263..00000000
--- a/ANDROID_3.4.5/fs/9p/acl.c
+++ /dev/null
@@ -1,380 +0,0 @@
-/*
- * Copyright IBM Corporation, 2010
- * Author Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of version 2.1 of the GNU Lesser General Public License
- * as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it would be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
- *
- */
-
-#include <linux/module.h>
-#include <linux/fs.h>
-#include <net/9p/9p.h>
-#include <net/9p/client.h>
-#include <linux/slab.h>
-#include <linux/sched.h>
-#include <linux/posix_acl_xattr.h>
-#include "xattr.h"
-#include "acl.h"
-#include "v9fs.h"
-#include "v9fs_vfs.h"
-
-static struct posix_acl *__v9fs_get_acl(struct p9_fid *fid, char *name)
-{
- ssize_t size;
- void *value = NULL;
- struct posix_acl *acl = NULL;
-
- size = v9fs_fid_xattr_get(fid, name, NULL, 0);
- if (size > 0) {
- value = kzalloc(size, GFP_NOFS);
- if (!value)
- return ERR_PTR(-ENOMEM);
- size = v9fs_fid_xattr_get(fid, name, value, size);
- if (size > 0) {
- acl = posix_acl_from_xattr(value, size);
- if (IS_ERR(acl))
- goto err_out;
- }
- } else if (size == -ENODATA || size == 0 ||
- size == -ENOSYS || size == -EOPNOTSUPP) {
- acl = NULL;
- } else
- acl = ERR_PTR(-EIO);
-
-err_out:
- kfree(value);
- return acl;
-}
-
-int v9fs_get_acl(struct inode *inode, struct p9_fid *fid)
-{
- int retval = 0;
- struct posix_acl *pacl, *dacl;
- struct v9fs_session_info *v9ses;
-
- v9ses = v9fs_inode2v9ses(inode);
- if (((v9ses->flags & V9FS_ACCESS_MASK) != V9FS_ACCESS_CLIENT) ||
- ((v9ses->flags & V9FS_ACL_MASK) != V9FS_POSIX_ACL)) {
- set_cached_acl(inode, ACL_TYPE_DEFAULT, NULL);
- set_cached_acl(inode, ACL_TYPE_ACCESS, NULL);
- return 0;
- }
- /* get the default/access acl values and cache them */
- dacl = __v9fs_get_acl(fid, POSIX_ACL_XATTR_DEFAULT);
- pacl = __v9fs_get_acl(fid, POSIX_ACL_XATTR_ACCESS);
-
- if (!IS_ERR(dacl) && !IS_ERR(pacl)) {
- set_cached_acl(inode, ACL_TYPE_DEFAULT, dacl);
- set_cached_acl(inode, ACL_TYPE_ACCESS, pacl);
- } else
- retval = -EIO;
-
- if (!IS_ERR(dacl))
- posix_acl_release(dacl);
-
- if (!IS_ERR(pacl))
- posix_acl_release(pacl);
-
- return retval;
-}
-
-static struct posix_acl *v9fs_get_cached_acl(struct inode *inode, int type)
-{
- struct posix_acl *acl;
- /*
- * 9p Always cache the acl value when
- * instantiating the inode (v9fs_inode_from_fid)
- */
- acl = get_cached_acl(inode, type);
- BUG_ON(acl == ACL_NOT_CACHED);
- return acl;
-}
-
-struct posix_acl *v9fs_iop_get_acl(struct inode *inode, int type)
-{
- struct v9fs_session_info *v9ses;
-
- v9ses = v9fs_inode2v9ses(inode);
- if (((v9ses->flags & V9FS_ACCESS_MASK) != V9FS_ACCESS_CLIENT) ||
- ((v9ses->flags & V9FS_ACL_MASK) != V9FS_POSIX_ACL)) {
- /*
- * On access = client and acl = on mode get the acl
- * values from the server
- */
- return NULL;
- }
- return v9fs_get_cached_acl(inode, type);
-
-}
-
-static int v9fs_set_acl(struct dentry *dentry, int type, struct posix_acl *acl)
-{
- int retval;
- char *name;
- size_t size;
- void *buffer;
- struct inode *inode = dentry->d_inode;
-
- set_cached_acl(inode, type, acl);
-
- if (!acl)
- return 0;
-
- /* Set a setxattr request to server */
- size = posix_acl_xattr_size(acl->a_count);
- buffer = kmalloc(size, GFP_KERNEL);
- if (!buffer)
- return -ENOMEM;
- retval = posix_acl_to_xattr(acl, buffer, size);
- if (retval < 0)
- goto err_free_out;
- switch (type) {
- case ACL_TYPE_ACCESS:
- name = POSIX_ACL_XATTR_ACCESS;
- break;
- case ACL_TYPE_DEFAULT:
- name = POSIX_ACL_XATTR_DEFAULT;
- break;
- default:
- BUG();
- }
- retval = v9fs_xattr_set(dentry, name, buffer, size, 0);
-err_free_out:
- kfree(buffer);
- return retval;
-}
-
-int v9fs_acl_chmod(struct dentry *dentry)
-{
- int retval = 0;
- struct posix_acl *acl;
- struct inode *inode = dentry->d_inode;
-
- if (S_ISLNK(inode->i_mode))
- return -EOPNOTSUPP;
- acl = v9fs_get_cached_acl(inode, ACL_TYPE_ACCESS);
- if (acl) {
- retval = posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode);
- if (retval)
- return retval;
- retval = v9fs_set_acl(dentry, ACL_TYPE_ACCESS, acl);
- posix_acl_release(acl);
- }
- return retval;
-}
-
-int v9fs_set_create_acl(struct dentry *dentry,
- struct posix_acl **dpacl, struct posix_acl **pacl)
-{
- if (dentry) {
- v9fs_set_acl(dentry, ACL_TYPE_DEFAULT, *dpacl);
- v9fs_set_acl(dentry, ACL_TYPE_ACCESS, *pacl);
- }
- posix_acl_release(*dpacl);
- posix_acl_release(*pacl);
- *dpacl = *pacl = NULL;
- return 0;
-}
-
-int v9fs_acl_mode(struct inode *dir, umode_t *modep,
- struct posix_acl **dpacl, struct posix_acl **pacl)
-{
- int retval = 0;
- umode_t mode = *modep;
- struct posix_acl *acl = NULL;
-
- if (!S_ISLNK(mode)) {
- acl = v9fs_get_cached_acl(dir, ACL_TYPE_DEFAULT);
- if (IS_ERR(acl))
- return PTR_ERR(acl);
- if (!acl)
- mode &= ~current_umask();
- }
- if (acl) {
- if (S_ISDIR(mode))
- *dpacl = posix_acl_dup(acl);
- retval = posix_acl_create(&acl, GFP_NOFS, &mode);
- if (retval < 0)
- return retval;
- if (retval > 0)
- *pacl = acl;
- else
- posix_acl_release(acl);
- }
- *modep = mode;
- return 0;
-}
-
-static int v9fs_remote_get_acl(struct dentry *dentry, const char *name,
- void *buffer, size_t size, int type)
-{
- char *full_name;
-
- switch (type) {
- case ACL_TYPE_ACCESS:
- full_name = POSIX_ACL_XATTR_ACCESS;
- break;
- case ACL_TYPE_DEFAULT:
- full_name = POSIX_ACL_XATTR_DEFAULT;
- break;
- default:
- BUG();
- }
- return v9fs_xattr_get(dentry, full_name, buffer, size);
-}
-
-static int v9fs_xattr_get_acl(struct dentry *dentry, const char *name,
- void *buffer, size_t size, int type)
-{
- struct v9fs_session_info *v9ses;
- struct posix_acl *acl;
- int error;
-
- if (strcmp(name, "") != 0)
- return -EINVAL;
-
- v9ses = v9fs_dentry2v9ses(dentry);
- /*
- * We allow set/get/list of acl when access=client is not specified
- */
- if ((v9ses->flags & V9FS_ACCESS_MASK) != V9FS_ACCESS_CLIENT)
- return v9fs_remote_get_acl(dentry, name, buffer, size, type);
-
- acl = v9fs_get_cached_acl(dentry->d_inode, type);
- if (IS_ERR(acl))
- return PTR_ERR(acl);
- if (acl == NULL)
- return -ENODATA;
- error = posix_acl_to_xattr(acl, buffer, size);
- posix_acl_release(acl);
-
- return error;
-}
-
-static int v9fs_remote_set_acl(struct dentry *dentry, const char *name,
- const void *value, size_t size,
- int flags, int type)
-{
- char *full_name;
-
- switch (type) {
- case ACL_TYPE_ACCESS:
- full_name = POSIX_ACL_XATTR_ACCESS;
- break;
- case ACL_TYPE_DEFAULT:
- full_name = POSIX_ACL_XATTR_DEFAULT;
- break;
- default:
- BUG();
- }
- return v9fs_xattr_set(dentry, full_name, value, size, flags);
-}
-
-
-static int v9fs_xattr_set_acl(struct dentry *dentry, const char *name,
- const void *value, size_t size,
- int flags, int type)
-{
- int retval;
- struct posix_acl *acl;
- struct v9fs_session_info *v9ses;
- struct inode *inode = dentry->d_inode;
-
- if (strcmp(name, "") != 0)
- return -EINVAL;
-
- v9ses = v9fs_dentry2v9ses(dentry);
- /*
- * set the attribute on the remote. Without even looking at the
- * xattr value. We leave it to the server to validate
- */
- if ((v9ses->flags & V9FS_ACCESS_MASK) != V9FS_ACCESS_CLIENT)
- return v9fs_remote_set_acl(dentry, name,
- value, size, flags, type);
-
- if (S_ISLNK(inode->i_mode))
- return -EOPNOTSUPP;
- if (!inode_owner_or_capable(inode))
- return -EPERM;
- if (value) {
- /* update the cached acl value */
- acl = posix_acl_from_xattr(value, size);
- if (IS_ERR(acl))
- return PTR_ERR(acl);
- else if (acl) {
- retval = posix_acl_valid(acl);
- if (retval)
- goto err_out;
- }
- } else
- acl = NULL;
-
- switch (type) {
- case ACL_TYPE_ACCESS:
- name = POSIX_ACL_XATTR_ACCESS;
- if (acl) {
- umode_t mode = inode->i_mode;
- retval = posix_acl_equiv_mode(acl, &mode);
- if (retval < 0)
- goto err_out;
- else {
- struct iattr iattr;
- if (retval == 0) {
- /*
- * ACL can be represented
- * by the mode bits. So don't
- * update ACL.
- */
- acl = NULL;
- value = NULL;
- size = 0;
- }
- /* Updte the mode bits */
- iattr.ia_mode = ((mode & S_IALLUGO) |
- (inode->i_mode & ~S_IALLUGO));
- iattr.ia_valid = ATTR_MODE;
- /* FIXME should we update ctime ?
- * What is the following setxattr update the
- * mode ?
- */
- v9fs_vfs_setattr_dotl(dentry, &iattr);
- }
- }
- break;
- case ACL_TYPE_DEFAULT:
- name = POSIX_ACL_XATTR_DEFAULT;
- if (!S_ISDIR(inode->i_mode)) {
- retval = acl ? -EINVAL : 0;
- goto err_out;
- }
- break;
- default:
- BUG();
- }
- retval = v9fs_xattr_set(dentry, name, value, size, flags);
- if (!retval)
- set_cached_acl(inode, type, acl);
-err_out:
- posix_acl_release(acl);
- return retval;
-}
-
-const struct xattr_handler v9fs_xattr_acl_access_handler = {
- .prefix = POSIX_ACL_XATTR_ACCESS,
- .flags = ACL_TYPE_ACCESS,
- .get = v9fs_xattr_get_acl,
- .set = v9fs_xattr_set_acl,
-};
-
-const struct xattr_handler v9fs_xattr_acl_default_handler = {
- .prefix = POSIX_ACL_XATTR_DEFAULT,
- .flags = ACL_TYPE_DEFAULT,
- .get = v9fs_xattr_get_acl,
- .set = v9fs_xattr_set_acl,
-};
generated by cgit (git 2.34.1) at 2025-01-23 22:44:48 +0000