vfs_dentry.o \
v9fs.o \
fid.o \
- xattr.o \
- xattr_user.o \
- xattr_trusted.o
+ xattr.o
9p-$(CONFIG_9P_FSCACHE) += cache.o
9p-$(CONFIG_9P_FS_POSIX_ACL) += acl.o
-9p-$(CONFIG_9P_FS_SECURITY) += xattr_security.o
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(const struct xattr_handler *handler,
struct dentry *dentry, const char *name,
void *buffer, size_t size)
{
struct v9fs_session_info *v9ses;
struct posix_acl *acl;
- int type = handler->flags;
int error;
if (strcmp(name, "") != 0)
* 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);
+ return v9fs_xattr_get(dentry, handler->prefix, buffer, size);
- acl = v9fs_get_cached_acl(d_inode(dentry), type);
+ acl = v9fs_get_cached_acl(d_inode(dentry), handler->flags);
if (IS_ERR(acl))
return PTR_ERR(acl);
if (acl == NULL)
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(const struct xattr_handler *handler,
struct dentry *dentry, const char *name,
const void *value, size_t size, int flags)
* 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, handler->flags);
+ return v9fs_xattr_set(dentry, handler->prefix, value, size,
+ flags);
if (S_ISLNK(inode->i_mode))
return -EOPNOTSUPP;
switch (handler->flags) {
case ACL_TYPE_ACCESS:
- name = POSIX_ACL_XATTR_ACCESS;
if (acl) {
umode_t mode = inode->i_mode;
retval = posix_acl_equiv_mode(acl, &mode);
}
break;
case ACL_TYPE_DEFAULT:
- name = POSIX_ACL_XATTR_DEFAULT;
if (!S_ISDIR(inode->i_mode)) {
retval = acl ? -EINVAL : 0;
goto err_out;
default:
BUG();
}
- retval = v9fs_xattr_set(dentry, name, value, size, flags);
+ retval = v9fs_xattr_set(dentry, handler->prefix, value, size, flags);
if (!retval)
set_cached_acl(inode, handler->flags, acl);
err_out:
return v9fs_xattr_get(dentry, NULL, buffer, buffer_size);
}
+static int v9fs_xattr_handler_get(const struct xattr_handler *handler,
+ struct dentry *dentry, const char *name,
+ void *buffer, size_t size)
+{
+ const char *full_name = xattr_full_name(handler, name);
+
+ if (strcmp(name, "") == 0)
+ return -EINVAL;
+ return v9fs_xattr_get(dentry, full_name, buffer, size);
+}
+
+static int v9fs_xattr_handler_set(const struct xattr_handler *handler,
+ struct dentry *dentry, const char *name,
+ const void *value, size_t size, int flags)
+{
+ const char *full_name = xattr_full_name(handler, name);
+
+ if (strcmp(name, "") == 0)
+ return -EINVAL;
+ return v9fs_xattr_set(dentry, full_name, value, size, flags);
+}
+
+static struct xattr_handler v9fs_xattr_user_handler = {
+ .prefix = XATTR_USER_PREFIX,
+ .get = v9fs_xattr_handler_get,
+ .set = v9fs_xattr_handler_set,
+};
+
+static struct xattr_handler v9fs_xattr_trusted_handler = {
+ .prefix = XATTR_TRUSTED_PREFIX,
+ .get = v9fs_xattr_handler_get,
+ .set = v9fs_xattr_handler_set,
+};
+
+#ifdef CONFIG_9P_FS_SECURITY
+static struct xattr_handler v9fs_xattr_security_handler = {
+ .prefix = XATTR_SECURITY_PREFIX,
+ .get = v9fs_xattr_handler_get,
+ .set = v9fs_xattr_handler_set,
+};
+#endif
+
const struct xattr_handler *v9fs_xattr_handlers[] = {
&v9fs_xattr_user_handler,
&v9fs_xattr_trusted_handler,
#include <net/9p/client.h>
extern const struct xattr_handler *v9fs_xattr_handlers[];
-extern struct xattr_handler v9fs_xattr_user_handler;
-extern struct xattr_handler v9fs_xattr_trusted_handler;
-extern struct xattr_handler v9fs_xattr_security_handler;
extern const struct xattr_handler v9fs_xattr_acl_access_handler;
extern const struct xattr_handler v9fs_xattr_acl_default_handler;
+++ /dev/null
-/*
- * 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/string.h>
-#include <linux/fs.h>
-#include <linux/slab.h>
-#include "xattr.h"
-
-static int v9fs_xattr_security_get(const struct xattr_handler *handler,
- struct dentry *dentry, const char *name,
- void *buffer, size_t size)
-{
- int retval;
- char *full_name;
- size_t name_len;
- size_t prefix_len = XATTR_SECURITY_PREFIX_LEN;
-
- if (name == NULL)
- return -EINVAL;
-
- if (strcmp(name, "") == 0)
- return -EINVAL;
-
- name_len = strlen(name);
- full_name = kmalloc(prefix_len + name_len + 1 , GFP_KERNEL);
- if (!full_name)
- return -ENOMEM;
- memcpy(full_name, XATTR_SECURITY_PREFIX, prefix_len);
- memcpy(full_name+prefix_len, name, name_len);
- full_name[prefix_len + name_len] = '\0';
-
- retval = v9fs_xattr_get(dentry, full_name, buffer, size);
- kfree(full_name);
- return retval;
-}
-
-static int v9fs_xattr_security_set(const struct xattr_handler *handler,
- struct dentry *dentry, const char *name,
- const void *value, size_t size, int flags)
-{
- int retval;
- char *full_name;
- size_t name_len;
- size_t prefix_len = XATTR_SECURITY_PREFIX_LEN;
-
- if (name == NULL)
- return -EINVAL;
-
- if (strcmp(name, "") == 0)
- return -EINVAL;
-
- name_len = strlen(name);
- full_name = kmalloc(prefix_len + name_len + 1 , GFP_KERNEL);
- if (!full_name)
- return -ENOMEM;
- memcpy(full_name, XATTR_SECURITY_PREFIX, prefix_len);
- memcpy(full_name + prefix_len, name, name_len);
- full_name[prefix_len + name_len] = '\0';
-
- retval = v9fs_xattr_set(dentry, full_name, value, size, flags);
- kfree(full_name);
- return retval;
-}
-
-struct xattr_handler v9fs_xattr_security_handler = {
- .prefix = XATTR_SECURITY_PREFIX,
- .get = v9fs_xattr_security_get,
- .set = v9fs_xattr_security_set,
-};
+++ /dev/null
-/*
- * 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/string.h>
-#include <linux/fs.h>
-#include <linux/slab.h>
-#include "xattr.h"
-
-static int v9fs_xattr_trusted_get(const struct xattr_handler *handler,
- struct dentry *dentry, const char *name,
- void *buffer, size_t size)
-{
- int retval;
- char *full_name;
- size_t name_len;
- size_t prefix_len = XATTR_TRUSTED_PREFIX_LEN;
-
- if (name == NULL)
- return -EINVAL;
-
- if (strcmp(name, "") == 0)
- return -EINVAL;
-
- name_len = strlen(name);
- full_name = kmalloc(prefix_len + name_len + 1 , GFP_KERNEL);
- if (!full_name)
- return -ENOMEM;
- memcpy(full_name, XATTR_TRUSTED_PREFIX, prefix_len);
- memcpy(full_name+prefix_len, name, name_len);
- full_name[prefix_len + name_len] = '\0';
-
- retval = v9fs_xattr_get(dentry, full_name, buffer, size);
- kfree(full_name);
- return retval;
-}
-
-static int v9fs_xattr_trusted_set(const struct xattr_handler *handler,
- struct dentry *dentry, const char *name,
- const void *value, size_t size, int flags)
-{
- int retval;
- char *full_name;
- size_t name_len;
- size_t prefix_len = XATTR_TRUSTED_PREFIX_LEN;
-
- if (name == NULL)
- return -EINVAL;
-
- if (strcmp(name, "") == 0)
- return -EINVAL;
-
- name_len = strlen(name);
- full_name = kmalloc(prefix_len + name_len + 1 , GFP_KERNEL);
- if (!full_name)
- return -ENOMEM;
- memcpy(full_name, XATTR_TRUSTED_PREFIX, prefix_len);
- memcpy(full_name + prefix_len, name, name_len);
- full_name[prefix_len + name_len] = '\0';
-
- retval = v9fs_xattr_set(dentry, full_name, value, size, flags);
- kfree(full_name);
- return retval;
-}
-
-struct xattr_handler v9fs_xattr_trusted_handler = {
- .prefix = XATTR_TRUSTED_PREFIX,
- .get = v9fs_xattr_trusted_get,
- .set = v9fs_xattr_trusted_set,
-};
+++ /dev/null
-/*
- * 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/string.h>
-#include <linux/fs.h>
-#include <linux/slab.h>
-#include "xattr.h"
-
-static int v9fs_xattr_user_get(const struct xattr_handler *handler,
- struct dentry *dentry, const char *name,
- void *buffer, size_t size)
-{
- int retval;
- char *full_name;
- size_t name_len;
- size_t prefix_len = XATTR_USER_PREFIX_LEN;
-
- if (name == NULL)
- return -EINVAL;
-
- if (strcmp(name, "") == 0)
- return -EINVAL;
-
- name_len = strlen(name);
- full_name = kmalloc(prefix_len + name_len + 1 , GFP_KERNEL);
- if (!full_name)
- return -ENOMEM;
- memcpy(full_name, XATTR_USER_PREFIX, prefix_len);
- memcpy(full_name+prefix_len, name, name_len);
- full_name[prefix_len + name_len] = '\0';
-
- retval = v9fs_xattr_get(dentry, full_name, buffer, size);
- kfree(full_name);
- return retval;
-}
-
-static int v9fs_xattr_user_set(const struct xattr_handler *handler,
- struct dentry *dentry, const char *name,
- const void *value, size_t size, int flags)
-{
- int retval;
- char *full_name;
- size_t name_len;
- size_t prefix_len = XATTR_USER_PREFIX_LEN;
-
- if (name == NULL)
- return -EINVAL;
-
- if (strcmp(name, "") == 0)
- return -EINVAL;
-
- name_len = strlen(name);
- full_name = kmalloc(prefix_len + name_len + 1 , GFP_KERNEL);
- if (!full_name)
- return -ENOMEM;
- memcpy(full_name, XATTR_USER_PREFIX, prefix_len);
- memcpy(full_name + prefix_len, name, name_len);
- full_name[prefix_len + name_len] = '\0';
-
- retval = v9fs_xattr_set(dentry, full_name, value, size, flags);
- kfree(full_name);
- return retval;
-}
-
-struct xattr_handler v9fs_xattr_user_handler = {
- .prefix = XATTR_USER_PREFIX,
- .get = v9fs_xattr_user_get,
- .set = v9fs_xattr_user_set,
-};
EXPORT_SYMBOL(generic_setxattr);
EXPORT_SYMBOL(generic_removexattr);
+/**
+ * xattr_full_name - Compute full attribute name from suffix
+ *
+ * @handler: handler of the xattr_handler operation
+ * @name: name passed to the xattr_handler operation
+ *
+ * The get and set xattr handler operations are called with the remainder of
+ * the attribute name after skipping the handler's prefix: for example, "foo"
+ * is passed to the get operation of a handler with prefix "user." to get
+ * attribute "user.foo". The full name is still "there" in the name though.
+ *
+ * Note: the list xattr handler operation when called from the vfs is passed a
+ * NULL name; some file systems use this operation internally, with varying
+ * semantics.
+ */
+const char *xattr_full_name(const struct xattr_handler *handler,
+ const char *name)
+{
+ size_t prefix_len = strlen(handler->prefix);
+
+ return name - prefix_len;
+}
+EXPORT_SYMBOL(xattr_full_name);
+
/*
* Allocate new xattr and copy in the value; but leave the name to callers.
*/
struct xattr_handler {
const char *prefix;
- int flags; /* fs private flags passed back to the handlers */
- size_t (*list)(struct dentry *dentry, char *list, size_t list_size,
- const char *name, size_t name_len, int handler_flags);
- int (*get)(struct dentry *dentry, const char *name, void *buffer,
- size_t size, int handler_flags);
- int (*set)(struct dentry *dentry, const char *name, const void *buffer,
- size_t size, int flags, int handler_flags);
+ int flags; /* fs private flags */
+ size_t (*list)(const struct xattr_handler *, struct dentry *dentry,
+ char *list, size_t list_size, const char *name,
+ size_t name_len);
+ int (*get)(const struct xattr_handler *, struct dentry *dentry,
+ const char *name, void *buffer, size_t size);
+ int (*set)(const struct xattr_handler *, struct dentry *dentry,
+ const char *name, const void *buffer, size_t size,
+ int flags);
};
+const char *xattr_full_name(const struct xattr_handler *, const char *);
+
struct xattr {
const char *name;
void *value;
projects / kernel.git / commitdiff