linux/fs/9p/xattr.c

// SPDX-License-Identifier: LGPL-2.1
/*
 * Copyright IBM Corporation, 2010
 * Author Aneesh Kumar K.V <[email protected]>
 */

#include <linux/module.h>
#include <linux/fs.h>
#include <linux/sched.h>
#include <linux/uio.h>
#include <linux/posix_acl_xattr.h>
#include <net/9p/9p.h>
#include <net/9p/client.h>

#include "fid.h"
#include "xattr.h"

ssize_t v9fs_fid_xattr_get(struct p9_fid *fid, const char *name,
			   void *buffer, size_t buffer_size)
{ … }


/*
 * v9fs_xattr_get()
 *
 * Copy an extended attribute into the buffer
 * provided, or compute the buffer size required.
 * Buffer is NULL to compute the size of the buffer required.
 *
 * Returns a negative error number on failure, or the number of bytes
 * used / required on success.
 */
ssize_t v9fs_xattr_get(struct dentry *dentry, const char *name,
		       void *buffer, size_t buffer_size)
{ … }

/*
 * v9fs_xattr_set()
 *
 * Create, replace or remove an extended attribute for this inode. Buffer
 * is NULL to remove an existing extended attribute, and non-NULL to
 * either replace an existing extended attribute, or create a new extended
 * attribute. The flags XATTR_REPLACE and XATTR_CREATE
 * specify that an extended attribute must exist and must not exist
 * previous to the call, respectively.
 *
 * Returns 0, or a negative error number on failure.
 */
int v9fs_xattr_set(struct dentry *dentry, const char *name,
		   const void *value, size_t value_len, int flags)
{ … }

int v9fs_fid_xattr_set(struct p9_fid *fid, const char *name,
		   const void *value, size_t value_len, int flags)
{ … }

ssize_t v9fs_listxattr(struct dentry *dentry, char *buffer, size_t buffer_size)
{ … }

static int v9fs_xattr_handler_get(const struct xattr_handler *handler,
				  struct dentry *dentry, struct inode *inode,
				  const char *name, void *buffer, size_t size)
{ … }

static int v9fs_xattr_handler_set(const struct xattr_handler *handler,
				  struct mnt_idmap *idmap,
				  struct dentry *dentry, struct inode *inode,
				  const char *name, const void *value,
				  size_t size, int flags)
{ … }

static const struct xattr_handler v9fs_xattr_user_handler = …;

static const struct xattr_handler v9fs_xattr_trusted_handler = …;

#ifdef CONFIG_9P_FS_SECURITY
static const struct xattr_handler v9fs_xattr_security_handler = …;
#endif

const struct xattr_handler * const v9fs_xattr_handlers[] = …;