d9a82a0403
The xattr_handler operations are currently all passed a file system specific flags value which the operations can use to disambiguate between different handlers; some file systems use that to distinguish the xattr namespace, for example. In some oprations, it would be useful to also have access to the handler prefix. To allow that, pass a pointer to the handler to operations instead of the flags value alone. Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
94 lines
2.4 KiB
C
94 lines
2.4 KiB
C
/*
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* JFFS2 -- Journalling Flash File System, Version 2.
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*
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* Copyright © 2006 NEC Corporation
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*
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* Created by KaiGai Kohei <kaigai@ak.jp.nec.com>
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*
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* For licensing information, see the file 'LICENCE' in this directory.
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*
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*/
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/fs.h>
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#include <linux/time.h>
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#include <linux/pagemap.h>
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#include <linux/highmem.h>
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#include <linux/crc32.h>
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#include <linux/jffs2.h>
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#include <linux/xattr.h>
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#include <linux/mtd/mtd.h>
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#include <linux/security.h>
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#include "nodelist.h"
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/* ---- Initial Security Label(s) Attachment callback --- */
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static int jffs2_initxattrs(struct inode *inode,
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const struct xattr *xattr_array, void *fs_info)
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{
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const struct xattr *xattr;
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int err = 0;
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for (xattr = xattr_array; xattr->name != NULL; xattr++) {
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err = do_jffs2_setxattr(inode, JFFS2_XPREFIX_SECURITY,
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xattr->name, xattr->value,
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xattr->value_len, 0);
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if (err < 0)
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break;
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}
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return err;
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}
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/* ---- Initial Security Label(s) Attachment ----------- */
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int jffs2_init_security(struct inode *inode, struct inode *dir,
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const struct qstr *qstr)
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{
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return security_inode_init_security(inode, dir, qstr,
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&jffs2_initxattrs, NULL);
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}
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/* ---- XATTR Handler for "security.*" ----------------- */
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static int jffs2_security_getxattr(const struct xattr_handler *handler,
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struct dentry *dentry, const char *name,
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void *buffer, size_t size)
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{
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if (!strcmp(name, ""))
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return -EINVAL;
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return do_jffs2_getxattr(d_inode(dentry), JFFS2_XPREFIX_SECURITY,
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name, buffer, size);
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}
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static int jffs2_security_setxattr(const struct xattr_handler *handler,
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struct dentry *dentry, const char *name,
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const void *buffer, size_t size, int flags)
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{
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if (!strcmp(name, ""))
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return -EINVAL;
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return do_jffs2_setxattr(d_inode(dentry), JFFS2_XPREFIX_SECURITY,
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name, buffer, size, flags);
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}
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static size_t jffs2_security_listxattr(const struct xattr_handler *handler,
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struct dentry *dentry, char *list,
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size_t list_size, const char *name,
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size_t name_len)
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{
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size_t retlen = XATTR_SECURITY_PREFIX_LEN + name_len + 1;
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if (list && retlen <= list_size) {
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strcpy(list, XATTR_SECURITY_PREFIX);
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strcpy(list + XATTR_SECURITY_PREFIX_LEN, name);
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}
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return retlen;
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}
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const struct xattr_handler jffs2_security_xattr_handler = {
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.prefix = XATTR_SECURITY_PREFIX,
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.list = jffs2_security_listxattr,
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.set = jffs2_security_setxattr,
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.get = jffs2_security_getxattr
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};
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