freebsd-dev/sys/fs/smbfs/smbfs_subr.h
Davide Italiano afe097512c Fix panic due to page faults while in kernel mode, under conditions of
VM pressure. The reason is that in some codepaths pointers to stack
variables were passed from one thread to another.

In collaboration with:	pho
Reported by:	pho's stress2 suite
Sponsored by:	iXsystems inc.
2012-10-31 03:34:07 +00:00

185 lines
6.6 KiB
C

/*-
* Copyright (c) 2000-2001 Boris Popov
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef _FS_SMBFS_SMBFS_SUBR_H_
#define _FS_SMBFS_SMBFS_SUBR_H_
#ifdef MALLOC_DECLARE
MALLOC_DECLARE(M_SMBFSDATA);
MALLOC_DECLARE(M_SMBFSCRED);
#endif
#define SMBFSERR(format, args...) printf("%s: "format, __func__ ,## args)
#ifdef SMB_VNODE_DEBUG
#define SMBVDEBUG(format, args...) printf("%s: "format, __func__ ,## args)
#else
#define SMBVDEBUG(format, args...)
#endif
/*
* Possible lock commands
*/
#define SMB_LOCK_EXCL 0
#define SMB_LOCK_SHARED 1
#define SMB_LOCK_RELEASE 2
struct smbmount;
struct proc;
struct timespec;
struct ucred;
struct vattr;
struct vnode;
struct statfs;
struct smbfattr {
int fa_attr;
int64_t fa_size;
struct timespec fa_atime;
struct timespec fa_ctime;
struct timespec fa_mtime;
long fa_ino;
};
/*
* Context to perform findfirst/findnext/findclose operations
*/
#define SMBFS_RDD_FINDFIRST 0x01
#define SMBFS_RDD_EOF 0x02
#define SMBFS_RDD_FINDSINGLE 0x04
#define SMBFS_RDD_USESEARCH 0x08
#define SMBFS_RDD_NOCLOSE 0x10
#define SMBFS_RDD_GOTRNAME 0x1000
/*
* Search context supplied by server
*/
#define SMB_SKEYLEN 21 /* search context */
#define SMB_DENTRYLEN (SMB_SKEYLEN + 22) /* entire entry */
struct smbfs_fctx {
/*
* Setable values
*/
int f_flags; /* SMBFS_RDD_ */
/*
* Return values
*/
struct smbfattr f_attr; /* current attributes */
char * f_name; /* current file name */
int f_nmlen; /* name len */
/*
* Internal variables
*/
int f_limit; /* maximum number of entries */
int f_attrmask; /* SMB_FA_ */
int f_wclen;
const char * f_wildcard;
struct smbnode* f_dnp;
struct smb_cred*f_scred;
struct smb_share *f_ssp;
union {
struct smb_rq * uf_rq;
struct smb_t2rq * uf_t2;
} f_urq;
int f_left; /* entries left */
int f_ecnt; /* entries left in the current reponse */
int f_eofs; /* entry offset in the parameter block */
u_char f_skey[SMB_SKEYLEN]; /* server side search context */
u_char f_fname[8 + 1 + 3 + 1]; /* common case for 8.3 filenames */
u_int16_t f_Sid;
u_int16_t f_infolevel;
int f_rnamelen;
char * f_rname; /* resume name/key */
int f_rnameofs;
};
#define f_rq f_urq.uf_rq
#define f_t2 f_urq.uf_t2
/*
* smb level
*/
int smbfs_smb_lock(struct smbnode *np, int op, caddr_t id,
off_t start, off_t end, struct smb_cred *scred);
int smbfs_smb_statfs2(struct smb_share *ssp, struct statfs *sbp,
struct smb_cred *scred);
int smbfs_smb_statfs(struct smb_share *ssp, struct statfs *sbp,
struct smb_cred *scred);
int smbfs_smb_setfsize(struct smbnode *np, int newsize, struct smb_cred *scred);
int smbfs_smb_query_info(struct smbnode *np, const char *name, int len,
struct smbfattr *fap, struct smb_cred *scred);
int smbfs_smb_setpattr(struct smbnode *np, u_int16_t attr,
struct timespec *mtime, struct smb_cred *scred);
int smbfs_smb_setptime2(struct smbnode *np, struct timespec *mtime,
struct timespec *atime, int attr, struct smb_cred *scred);
int smbfs_smb_setpattrNT(struct smbnode *np, u_int16_t attr,
struct timespec *mtime, struct timespec *atime, struct smb_cred *scred);
int smbfs_smb_setftime(struct smbnode *np, struct timespec *mtime,
struct timespec *atime, struct smb_cred *scred);
int smbfs_smb_setfattrNT(struct smbnode *np, u_int16_t attr,
struct timespec *mtime, struct timespec *atime, struct smb_cred *scred);
int smbfs_smb_open(struct smbnode *np, int accmode, struct smb_cred *scred);
int smbfs_smb_close(struct smb_share *ssp, u_int16_t fid,
struct timespec *mtime, struct smb_cred *scred);
int smbfs_smb_create(struct smbnode *dnp, const char *name, int len,
struct smb_cred *scred);
int smbfs_smb_delete(struct smbnode *np, struct smb_cred *scred);
int smbfs_smb_flush(struct smbnode *np, struct smb_cred *scred);
int smbfs_smb_rename(struct smbnode *src, struct smbnode *tdnp,
const char *tname, int tnmlen, struct smb_cred *scred);
int smbfs_smb_move(struct smbnode *src, struct smbnode *tdnp,
const char *tname, int tnmlen, u_int16_t flags, struct smb_cred *scred);
int smbfs_smb_mkdir(struct smbnode *dnp, const char *name, int len,
struct smb_cred *scred);
int smbfs_smb_rmdir(struct smbnode *np, struct smb_cred *scred);
int smbfs_findopen(struct smbnode *dnp, const char *wildcard, int wclen,
int attr, struct smb_cred *scred, struct smbfs_fctx **ctxpp);
int smbfs_findnext(struct smbfs_fctx *ctx, int limit, struct smb_cred *scred);
int smbfs_findclose(struct smbfs_fctx *ctx, struct smb_cred *scred);
int smbfs_fullpath(struct mbchain *mbp, struct smb_vc *vcp,
struct smbnode *dnp, const char *name, int nmlen);
int smbfs_smb_lookup(struct smbnode *dnp, const char *name, int nmlen,
struct smbfattr *fap, struct smb_cred *scred);
int smbfs_fname_tolocal(struct smb_vc *vcp, char *name, int *nmlen, int caseopt);
void smb_time_local2server(struct timespec *tsp, int tzoff, u_long *seconds);
void smb_time_server2local(u_long seconds, int tzoff, struct timespec *tsp);
void smb_time_NT2local(int64_t nsec, int tzoff, struct timespec *tsp);
void smb_time_local2NT(struct timespec *tsp, int tzoff, int64_t *nsec);
void smb_time_unix2dos(struct timespec *tsp, int tzoff, u_int16_t *ddp,
u_int16_t *dtp, u_int8_t *dhp);
void smb_dos2unixtime (u_int dd, u_int dt, u_int dh, int tzoff, struct timespec *tsp);
void *smbfs_malloc_scred(void);
void smbfs_free_scred(void *);
#endif /* !_FS_SMBFS_SMBFS_SUBR_H_ */