Differential D14173 Diff 38901 head/sys/kern/vfs_extattr.c

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head/sys/kern/vfs_extattr.c

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#include <sys/limits.h>		#include <sys/limits.h>
#include <sys/vnode.h>		#include <sys/vnode.h>
#include <sys/proc.h>		#include <sys/proc.h>
#include <sys/extattr.h>		#include <sys/extattr.h>

#include <security/audit/audit.h>		#include <security/audit/audit.h>
#include <security/mac/mac_framework.h>		#include <security/mac/mac_framework.h>

		static int kern_extattr_set_path(struct thread td, const char path,
		int attrnamespace, const char attrname, void data,
		size_t nbytes, int follow);
		static int kern_extattr_get_path(struct thread td, const char path,
		int attrnamespace, const char attrname, void data,
		size_t nbytes, int follow);
		static int kern_extattr_delete_path(struct thread td, const char path,
		int attrnamespace, const char *attrname, int follow);
		static int kern_extattr_list_path(struct thread td, const char path,
		int attrnamespace, void *data, size_t nbytes, int follow);

/*		/*
* Syscall to push extended attribute configuration information into the VFS.		* Syscall to push extended attribute configuration information into the VFS.
* Accepts a path, which it converts to a mountpoint, as well as a command		* Accepts a path, which it converts to a mountpoint, as well as a command
* (int cmd), and attribute name and misc data.		* (int cmd), and attribute name and misc data.
*		*
* Currently this is used only by UFS1 extended attributes.		* Currently this is used only by UFS1 extended attributes.
*/		*/
#ifndef _SYS_SYSPROTO_H_		#ifndef _SYS_SYSPROTO_H_
▲ Show 20 Lines • Show All 190 Lines • ▼ Show 20 Lines	struct extattr_set_file_args {
const char *attrname;		const char *attrname;
void *data;		void *data;
size_t nbytes;		size_t nbytes;
};		};
#endif		#endif
int		int
sys_extattr_set_file(struct thread td, struct extattr_set_file_args uap)		sys_extattr_set_file(struct thread td, struct extattr_set_file_args uap)
{		{
struct nameidata nd;
char attrname[EXTATTR_MAXNAMELEN];
int error;

AUDIT_ARG_VALUE(uap->attrnamespace);		return (kern_extattr_set_path(td, uap->path, uap->attrnamespace,
error = copyinstr(uap->attrname, attrname, EXTATTR_MAXNAMELEN, NULL);		uap->attrname, uap->data, uap->nbytes, FOLLOW));
if (error)
return (error);
AUDIT_ARG_TEXT(attrname);

NDINIT(&nd, LOOKUP, FOLLOW \| AUDITVNODE1, UIO_USERSPACE,
uap->path, td);
error = namei(&nd);
if (error)
return (error);
NDFREE(&nd, NDF_ONLY_PNBUF);

error = extattr_set_vp(nd.ni_vp, uap->attrnamespace, attrname,
uap->data, uap->nbytes, td);

vrele(nd.ni_vp);
return (error);
}		}

#ifndef _SYS_SYSPROTO_H_		#ifndef _SYS_SYSPROTO_H_
struct extattr_set_link_args {		struct extattr_set_link_args {
const char *path;		const char *path;
int attrnamespace;		int attrnamespace;
const char *attrname;		const char *attrname;
void *data;		void *data;
size_t nbytes;		size_t nbytes;
};		};
#endif		#endif
int		int
sys_extattr_set_link(struct thread td, struct extattr_set_link_args uap)		sys_extattr_set_link(struct thread td, struct extattr_set_link_args uap)
{		{

		return (kern_extattr_set_path(td, uap->path, uap->attrnamespace,
		uap->attrname, uap->data, uap->nbytes, NOFOLLOW));
		}

		static int
		kern_extattr_set_path(struct thread td, const char path, int attrnamespace,
		const char uattrname, void data, size_t nbytes, int follow)
		{
struct nameidata nd;		struct nameidata nd;
char attrname[EXTATTR_MAXNAMELEN];		char attrname[EXTATTR_MAXNAMELEN];
int error;		int error;

AUDIT_ARG_VALUE(uap->attrnamespace);		AUDIT_ARG_VALUE(attrnamespace);
error = copyinstr(uap->attrname, attrname, EXTATTR_MAXNAMELEN, NULL);		error = copyinstr(uattrname, attrname, EXTATTR_MAXNAMELEN, NULL);
if (error)		if (error)
return (error);		return (error);
AUDIT_ARG_TEXT(attrname);		AUDIT_ARG_TEXT(attrname);

NDINIT(&nd, LOOKUP, NOFOLLOW \| AUDITVNODE1, UIO_USERSPACE,		NDINIT(&nd, LOOKUP, follow \| AUDITVNODE1, UIO_USERSPACE, path, td);
uap->path, td);
error = namei(&nd);		error = namei(&nd);
if (error)		if (error)
return (error);		return (error);
NDFREE(&nd, NDF_ONLY_PNBUF);		NDFREE(&nd, NDF_ONLY_PNBUF);

error = extattr_set_vp(nd.ni_vp, uap->attrnamespace, attrname,		error = extattr_set_vp(nd.ni_vp, attrnamespace, attrname, data,
uap->data, uap->nbytes, td);		nbytes, td);

vrele(nd.ni_vp);		vrele(nd.ni_vp);
return (error);		return (error);
}		}

/*-		/*-
* Get a named extended attribute on a file or directory		* Get a named extended attribute on a file or directory
*		*
▲ Show 20 Lines • Show All 107 Lines • ▼ Show 20 Lines	struct extattr_get_file_args {
const char *attrname;		const char *attrname;
void *data;		void *data;
size_t nbytes;		size_t nbytes;
};		};
#endif		#endif
int		int
sys_extattr_get_file(struct thread td, struct extattr_get_file_args uap)		sys_extattr_get_file(struct thread td, struct extattr_get_file_args uap)
{		{
struct nameidata nd;		return (kern_extattr_get_path(td, uap->path, uap->attrnamespace,
char attrname[EXTATTR_MAXNAMELEN];		uap->attrname, uap->data, uap->nbytes, FOLLOW));
int error;

AUDIT_ARG_VALUE(uap->attrnamespace);
error = copyinstr(uap->attrname, attrname, EXTATTR_MAXNAMELEN, NULL);
if (error)
return (error);
AUDIT_ARG_TEXT(attrname);

NDINIT(&nd, LOOKUP, FOLLOW \| AUDITVNODE1, UIO_USERSPACE, uap->path, td);
error = namei(&nd);
if (error)
return (error);
NDFREE(&nd, NDF_ONLY_PNBUF);

error = extattr_get_vp(nd.ni_vp, uap->attrnamespace, attrname,
uap->data, uap->nbytes, td);

vrele(nd.ni_vp);
return (error);
}		}

#ifndef _SYS_SYSPROTO_H_		#ifndef _SYS_SYSPROTO_H_
struct extattr_get_link_args {		struct extattr_get_link_args {
const char *path;		const char *path;
int attrnamespace;		int attrnamespace;
const char *attrname;		const char *attrname;
void *data;		void *data;
size_t nbytes;		size_t nbytes;
};		};
#endif		#endif
int		int
sys_extattr_get_link(struct thread td, struct extattr_get_link_args uap)		sys_extattr_get_link(struct thread td, struct extattr_get_link_args uap)
{		{
		return (kern_extattr_get_path(td, uap->path, uap->attrnamespace,
		uap->attrname, uap->data, uap->nbytes, NOFOLLOW));
		}

		static int
		kern_extattr_get_path(struct thread td, const char path, int attrnamespace,
		const char uattrname, void data, size_t nbytes, int follow)
		{
struct nameidata nd;		struct nameidata nd;
char attrname[EXTATTR_MAXNAMELEN];		char attrname[EXTATTR_MAXNAMELEN];
int error;		int error;

AUDIT_ARG_VALUE(uap->attrnamespace);		AUDIT_ARG_VALUE(attrnamespace);
error = copyinstr(uap->attrname, attrname, EXTATTR_MAXNAMELEN, NULL);		error = copyinstr(uattrname, attrname, EXTATTR_MAXNAMELEN, NULL);
if (error)		if (error)
return (error);		return (error);
AUDIT_ARG_TEXT(attrname);		AUDIT_ARG_TEXT(attrname);

NDINIT(&nd, LOOKUP, NOFOLLOW \| AUDITVNODE1, UIO_USERSPACE, uap->path,		NDINIT(&nd, LOOKUP, follow \| AUDITVNODE1, UIO_USERSPACE, path, td);
td);
error = namei(&nd);		error = namei(&nd);
if (error)		if (error)
return (error);		return (error);
NDFREE(&nd, NDF_ONLY_PNBUF);		NDFREE(&nd, NDF_ONLY_PNBUF);

error = extattr_get_vp(nd.ni_vp, uap->attrnamespace, attrname,		error = extattr_get_vp(nd.ni_vp, attrnamespace, attrname, data,
uap->data, uap->nbytes, td);		nbytes, td);

vrele(nd.ni_vp);		vrele(nd.ni_vp);
return (error);		return (error);
}		}

/*		/*
* extattr_delete_vp(): Delete a named extended attribute on a file or		* extattr_delete_vp(): Delete a named extended attribute on a file or
* directory		* directory
▲ Show 20 Lines • Show All 74 Lines • ▼ Show 20 Lines	struct extattr_delete_file_args {
const char *path;		const char *path;
int attrnamespace;		int attrnamespace;
const char *attrname;		const char *attrname;
};		};
#endif		#endif
int		int
sys_extattr_delete_file(struct thread td, struct extattr_delete_file_args uap)		sys_extattr_delete_file(struct thread td, struct extattr_delete_file_args uap)
{		{
struct nameidata nd;
char attrname[EXTATTR_MAXNAMELEN];
int error;

AUDIT_ARG_VALUE(uap->attrnamespace);		return (kern_extattr_delete_path(td, uap->path, uap->attrnamespace,
error = copyinstr(uap->attrname, attrname, EXTATTR_MAXNAMELEN, NULL);		uap->attrname, FOLLOW));
if (error)
return(error);
AUDIT_ARG_TEXT(attrname);

NDINIT(&nd, LOOKUP, FOLLOW \| AUDITVNODE1, UIO_USERSPACE, uap->path, td);
error = namei(&nd);
if (error)
return(error);
NDFREE(&nd, NDF_ONLY_PNBUF);

error = extattr_delete_vp(nd.ni_vp, uap->attrnamespace, attrname, td);
vrele(nd.ni_vp);
return(error);
}		}

#ifndef _SYS_SYSPROTO_H_		#ifndef _SYS_SYSPROTO_H_
struct extattr_delete_link_args {		struct extattr_delete_link_args {
const char *path;		const char *path;
int attrnamespace;		int attrnamespace;
const char *attrname;		const char *attrname;
};		};
#endif		#endif
int		int
sys_extattr_delete_link(struct thread td, struct extattr_delete_link_args uap)		sys_extattr_delete_link(struct thread td, struct extattr_delete_link_args uap)
{		{

		return (kern_extattr_delete_path(td, uap->path, uap->attrnamespace,
		uap->attrname, NOFOLLOW));
		}

		static int
		kern_extattr_delete_path(struct thread td, const char path, int attrnamespace,
		const char *uattrname, int follow)
		{
struct nameidata nd;		struct nameidata nd;
char attrname[EXTATTR_MAXNAMELEN];		char attrname[EXTATTR_MAXNAMELEN];
int error;		int error;

AUDIT_ARG_VALUE(uap->attrnamespace);		AUDIT_ARG_VALUE(attrnamespace);
error = copyinstr(uap->attrname, attrname, EXTATTR_MAXNAMELEN, NULL);		error = copyinstr(uattrname, attrname, EXTATTR_MAXNAMELEN, NULL);
if (error)		if (error)
return(error);		return(error);
AUDIT_ARG_TEXT(attrname);		AUDIT_ARG_TEXT(attrname);

NDINIT(&nd, LOOKUP, NOFOLLOW \| AUDITVNODE1, UIO_USERSPACE, uap->path, td);		NDINIT(&nd, LOOKUP, follow \| AUDITVNODE1, UIO_USERSPACE, path, td);
error = namei(&nd);		error = namei(&nd);
if (error)		if (error)
return(error);		return(error);
NDFREE(&nd, NDF_ONLY_PNBUF);		NDFREE(&nd, NDF_ONLY_PNBUF);

error = extattr_delete_vp(nd.ni_vp, uap->attrnamespace, attrname, td);		error = extattr_delete_vp(nd.ni_vp, attrnamespace, attrname, td);
vrele(nd.ni_vp);		vrele(nd.ni_vp);
return(error);		return(error);
}		}

/*-		/*-
* Retrieve a list of extended attributes on a file or directory.		* Retrieve a list of extended attributes on a file or directory.
*		*
* Arguments: unlocked vnode "vp", attribute namespace 'attrnamespace",		* Arguments: unlocked vnode "vp", attribute namespace 'attrnamespace",
▲ Show 20 Lines • Show All 93 Lines • ▼ Show 20 Lines	struct extattr_list_file_args {
int attrnamespace;		int attrnamespace;
void *data;		void *data;
size_t nbytes;		size_t nbytes;
}		}
#endif		#endif
int		int
sys_extattr_list_file(struct thread td, struct extattr_list_file_args uap)		sys_extattr_list_file(struct thread td, struct extattr_list_file_args uap)
{		{
struct nameidata nd;
int error;

AUDIT_ARG_VALUE(uap->attrnamespace);		return (kern_extattr_list_path(td, uap->path, uap->attrnamespace,
NDINIT(&nd, LOOKUP, FOLLOW \| AUDITVNODE1, UIO_USERSPACE, uap->path, td);		uap->data, uap->nbytes, FOLLOW));
error = namei(&nd);
if (error)
return (error);
NDFREE(&nd, NDF_ONLY_PNBUF);

error = extattr_list_vp(nd.ni_vp, uap->attrnamespace, uap->data,
uap->nbytes, td);

vrele(nd.ni_vp);
return (error);
}		}

#ifndef _SYS_SYSPROTO_H_		#ifndef _SYS_SYSPROTO_H_
struct extattr_list_link_args {		struct extattr_list_link_args {
const char *path;		const char *path;
int attrnamespace;		int attrnamespace;
void *data;		void *data;
size_t nbytes;		size_t nbytes;
};		};
#endif		#endif
int		int
sys_extattr_list_link(struct thread td, struct extattr_list_link_args uap)		sys_extattr_list_link(struct thread td, struct extattr_list_link_args uap)
{		{

		return (kern_extattr_list_path(td, uap->path, uap->attrnamespace,
		uap->data, uap->nbytes, NOFOLLOW));
		}

		static int
		kern_extattr_list_path(struct thread td, const char path, int attrnamespace,
		void *data, size_t nbytes, int follow)
		{
struct nameidata nd;		struct nameidata nd;
int error;		int error;

AUDIT_ARG_VALUE(uap->attrnamespace);		AUDIT_ARG_VALUE(attrnamespace);
NDINIT(&nd, LOOKUP, NOFOLLOW \| AUDITVNODE1, UIO_USERSPACE, uap->path,		NDINIT(&nd, LOOKUP, follow \| AUDITVNODE1, UIO_USERSPACE, path, td);
td);
error = namei(&nd);		error = namei(&nd);
if (error)		if (error)
return (error);		return (error);
NDFREE(&nd, NDF_ONLY_PNBUF);		NDFREE(&nd, NDF_ONLY_PNBUF);

error = extattr_list_vp(nd.ni_vp, uap->attrnamespace, uap->data,		error = extattr_list_vp(nd.ni_vp, attrnamespace, data, nbytes, td);
uap->nbytes, td);

vrele(nd.ni_vp);		vrele(nd.ni_vp);
return (error);		return (error);
}		}