9d8f13ba3f
This patch changes the security_inode_init_security API by adding a filesystem specific callback to write security extended attributes. This change is in preparation for supporting the initialization of multiple LSM xattrs and the EVM xattr. Initially the callback function walks an array of xattrs, writing each xattr separately, but could be optimized to write multiple xattrs at once. For existing security_inode_init_security() calls, which have not yet been converted to use the new callback function, such as those in reiserfs and ocfs2, this patch defines security_old_inode_init_security(). Signed-off-by: Mimi Zohar <zohar@us.ibm.com>
90 lines
3.3 KiB
C
90 lines
3.3 KiB
C
/*
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File: linux/xattr.h
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Extended attributes handling.
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Copyright (C) 2001 by Andreas Gruenbacher <a.gruenbacher@computer.org>
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Copyright (c) 2001-2002 Silicon Graphics, Inc. All Rights Reserved.
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Copyright (c) 2004 Red Hat, Inc., James Morris <jmorris@redhat.com>
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*/
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#ifndef _LINUX_XATTR_H
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#define _LINUX_XATTR_H
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#define XATTR_CREATE 0x1 /* set value, fail if attr already exists */
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#define XATTR_REPLACE 0x2 /* set value, fail if attr does not exist */
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/* Namespaces */
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#define XATTR_OS2_PREFIX "os2."
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#define XATTR_OS2_PREFIX_LEN (sizeof (XATTR_OS2_PREFIX) - 1)
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#define XATTR_SECURITY_PREFIX "security."
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#define XATTR_SECURITY_PREFIX_LEN (sizeof (XATTR_SECURITY_PREFIX) - 1)
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#define XATTR_SYSTEM_PREFIX "system."
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#define XATTR_SYSTEM_PREFIX_LEN (sizeof (XATTR_SYSTEM_PREFIX) - 1)
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#define XATTR_TRUSTED_PREFIX "trusted."
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#define XATTR_TRUSTED_PREFIX_LEN (sizeof (XATTR_TRUSTED_PREFIX) - 1)
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#define XATTR_USER_PREFIX "user."
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#define XATTR_USER_PREFIX_LEN (sizeof (XATTR_USER_PREFIX) - 1)
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/* Security namespace */
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#define XATTR_SELINUX_SUFFIX "selinux"
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#define XATTR_NAME_SELINUX XATTR_SECURITY_PREFIX XATTR_SELINUX_SUFFIX
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#define XATTR_SMACK_SUFFIX "SMACK64"
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#define XATTR_SMACK_IPIN "SMACK64IPIN"
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#define XATTR_SMACK_IPOUT "SMACK64IPOUT"
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#define XATTR_SMACK_EXEC "SMACK64EXEC"
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#define XATTR_SMACK_TRANSMUTE "SMACK64TRANSMUTE"
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#define XATTR_SMACK_MMAP "SMACK64MMAP"
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#define XATTR_NAME_SMACK XATTR_SECURITY_PREFIX XATTR_SMACK_SUFFIX
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#define XATTR_NAME_SMACKIPIN XATTR_SECURITY_PREFIX XATTR_SMACK_IPIN
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#define XATTR_NAME_SMACKIPOUT XATTR_SECURITY_PREFIX XATTR_SMACK_IPOUT
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#define XATTR_NAME_SMACKEXEC XATTR_SECURITY_PREFIX XATTR_SMACK_EXEC
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#define XATTR_NAME_SMACKTRANSMUTE XATTR_SECURITY_PREFIX XATTR_SMACK_TRANSMUTE
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#define XATTR_NAME_SMACKMMAP XATTR_SECURITY_PREFIX XATTR_SMACK_MMAP
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#define XATTR_CAPS_SUFFIX "capability"
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#define XATTR_NAME_CAPS XATTR_SECURITY_PREFIX XATTR_CAPS_SUFFIX
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#ifdef __KERNEL__
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#include <linux/types.h>
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struct inode;
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struct dentry;
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struct xattr_handler {
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const char *prefix;
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int flags; /* fs private flags passed back to the handlers */
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size_t (*list)(struct dentry *dentry, char *list, size_t list_size,
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const char *name, size_t name_len, int handler_flags);
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int (*get)(struct dentry *dentry, const char *name, void *buffer,
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size_t size, int handler_flags);
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int (*set)(struct dentry *dentry, const char *name, const void *buffer,
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size_t size, int flags, int handler_flags);
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};
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struct xattr {
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char *name;
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void *value;
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size_t value_len;
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};
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ssize_t xattr_getsecurity(struct inode *, const char *, void *, size_t);
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ssize_t vfs_getxattr(struct dentry *, const char *, void *, size_t);
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ssize_t vfs_listxattr(struct dentry *d, char *list, size_t size);
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int __vfs_setxattr_noperm(struct dentry *, const char *, const void *, size_t, int);
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int vfs_setxattr(struct dentry *, const char *, const void *, size_t, int);
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int vfs_removexattr(struct dentry *, const char *);
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ssize_t generic_getxattr(struct dentry *dentry, const char *name, void *buffer, size_t size);
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ssize_t generic_listxattr(struct dentry *dentry, char *buffer, size_t buffer_size);
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int generic_setxattr(struct dentry *dentry, const char *name, const void *value, size_t size, int flags);
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int generic_removexattr(struct dentry *dentry, const char *name);
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#endif /* __KERNEL__ */
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#endif /* _LINUX_XATTR_H */
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