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Add support for large readx and writex functions if server supports them.

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Obtained from:	Darwin
MFC after:	2 weeks
This commit is contained in:
Boris Popov 2002-09-16 10:18:34 +00:00
parent 127686220a
commit e2a70cff10
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=103395
2 changed files with 178 additions and 0 deletions
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2
sys/netsmb/smb_conn.h
View File

@ -264,6 +264,8 @@ struct smb_vc {
u_short vc_mid; /* multiplex id */
struct smb_sopt vc_sopt; /* server options */
int vc_txmax; /* max tx/rx packet size */
int vc_rxmax; /* max readx data size */
int vc_wxmax; /* max writex data size */
struct smbiod * vc_iod;
struct smb_slock vc_stlock;
};

176
sys/netsmb/smb_smb.c
View File

@ -71,6 +71,32 @@ static struct smb_dialect smb_dialects[] = {
#define SMB_DIALECT_MAX (sizeof(smb_dialects) / sizeof(struct smb_dialect) - 2)
static u_int32_t
smb_vc_maxread(struct smb_vc *vcp)
{
/*
* Specs say up to 64k data bytes, but Windows traffic
* uses 60k... no doubt for some good reason.
*/
if (vcp->vc_sopt.sv_caps & SMB_CAP_LARGE_READX)
return (60*1024);
else
return (vcp->vc_sopt.sv_maxtx);
}
static u_int32_t
smb_vc_maxwrite(struct smb_vc *vcp)
{
/*
* Specs say up to 64k data bytes, but Windows traffic
* uses 60k... probably for some good reason.
*/
if (vcp->vc_sopt.sv_caps & SMB_CAP_LARGE_WRITEX)
return (60*1024);
else
return (vcp->vc_sopt.sv_maxtx);
}
static int
smb_smb_nomux(struct smb_vc *vcp, struct smb_cred *scred, const char *name)
{
@ -211,7 +237,13 @@ smb_smb_negotiate(struct smb_vc *vcp, struct smb_cred *scred)
}
if (sp->sv_maxtx <= 0 || sp->sv_maxtx > 0xffff)
sp->sv_maxtx = 1024;
else
sp->sv_maxtx = min(sp->sv_maxtx,
63*1024 + SMB_HDRLEN + 16);
SMB_TRAN_GETPARAM(vcp, SMBTP_RCVSZ, &maxqsz);
vcp->vc_rxmax = min(smb_vc_maxread(vcp), maxqsz - 1024);
SMB_TRAN_GETPARAM(vcp, SMBTP_SNDSZ, &maxqsz);
vcp->vc_wxmax = min(smb_vc_maxwrite(vcp), maxqsz - 1024);
vcp->vc_txmax = min(sp->sv_maxtx, maxqsz);
SMBSDEBUG("TZ = %d\n", sp->sv_tz);
SMBSDEBUG("CAPS = %x\n", sp->sv_caps);
@ -485,6 +517,144 @@ smb_smb_treedisconnect(struct smb_share *ssp, struct smb_cred *scred)
return error;
}
static __inline int
smb_smb_readx(struct smb_share *ssp, u_int16_t fid, int *len, int *rresid,
struct uio *uio, struct smb_cred *scred)
{
struct smb_rq *rqp;
struct mbchain *mbp;
struct mdchain *mdp;
u_int8_t wc;
int error;
u_int16_t residhi, residlo, off, doff;
u_int32_t resid;
error = smb_rq_alloc(SSTOCP(ssp), SMB_COM_READ_ANDX, scred, &rqp);
if (error)
return error;
smb_rq_getrequest(rqp, &mbp);
smb_rq_wstart(rqp);
mb_put_uint8(mbp, 0xff); /* no secondary command */
mb_put_uint8(mbp, 0); /* MBZ */
mb_put_uint16le(mbp, 0); /* offset to secondary */
mb_put_mem(mbp, (caddr_t)&fid, sizeof(fid), MB_MSYSTEM);
mb_put_uint32le(mbp, uio->uio_offset);
*len = min(SSTOVC(ssp)->vc_rxmax, *len);
mb_put_uint16le(mbp, *len); /* MaxCount */
mb_put_uint16le(mbp, *len); /* MinCount (only indicates blocking) */
mb_put_uint32le(mbp, (unsigned)*len >> 16); /* MaxCountHigh */
mb_put_uint16le(mbp, *len); /* Remaining ("obsolete") */
mb_put_uint32le(mbp, uio->uio_offset >> 32); /* OffsetHigh */
smb_rq_wend(rqp);
smb_rq_bstart(rqp);
smb_rq_bend(rqp);
do {
error = smb_rq_simple(rqp);
if (error)
break;
smb_rq_getreply(rqp, &mdp);
off = SMB_HDRLEN;
md_get_uint8(mdp, &wc);
off++;
if (wc != 12) {
error = EBADRPC;
break;
}
md_get_uint8(mdp, NULL);
off++;
md_get_uint8(mdp, NULL);
off++;
md_get_uint16le(mdp, NULL);
off += 2;
md_get_uint16le(mdp, NULL);
off += 2;
md_get_uint16le(mdp, NULL); /* data compaction mode */
off += 2;
md_get_uint16le(mdp, NULL);
off += 2;
md_get_uint16le(mdp, &residlo);
off += 2;
md_get_uint16le(mdp, &doff); /* data offset */
off += 2;
md_get_uint16le(mdp, &residhi);
off += 2;
resid = (residhi << 16) | residlo;
md_get_mem(mdp, NULL, 4 * 2, MB_MSYSTEM);
off += 4*2;
md_get_uint16le(mdp, NULL); /* ByteCount */
off += 2;
if (doff > off) /* pad byte(s)? */
md_get_mem(mdp, NULL, doff - off, MB_MSYSTEM);
if (resid == 0) {
*rresid = resid;
break;
}
error = md_get_uio(mdp, uio, resid);
if (error)
break;
*rresid = resid;
} while(0);
smb_rq_done(rqp);
return (error);
}
static __inline int
smb_smb_writex(struct smb_share *ssp, u_int16_t fid, int *len, int *rresid,
struct uio *uio, struct smb_cred *scred)
{
struct smb_rq *rqp;
struct mbchain *mbp;
struct mdchain *mdp;
int error;
u_int8_t wc;
u_int16_t resid;
error = smb_rq_alloc(SSTOCP(ssp), SMB_COM_WRITE_ANDX, scred, &rqp);
if (error)
return (error);
smb_rq_getrequest(rqp, &mbp);
smb_rq_wstart(rqp);
mb_put_uint8(mbp, 0xff); /* no secondary command */
mb_put_uint8(mbp, 0); /* MBZ */
mb_put_uint16le(mbp, 0); /* offset to secondary */
mb_put_mem(mbp, (caddr_t)&fid, sizeof(fid), MB_MSYSTEM);
mb_put_uint32le(mbp, uio->uio_offset);
mb_put_uint32le(mbp, 0); /* MBZ (timeout) */
mb_put_uint16le(mbp, 0); /* !write-thru */
mb_put_uint16le(mbp, 0);
*len = min(SSTOVC(ssp)->vc_wxmax, *len);
mb_put_uint16le(mbp, (unsigned)*len >> 16);
mb_put_uint16le(mbp, *len);
mb_put_uint16le(mbp, 64); /* data offset from header start */
mb_put_uint32le(mbp, uio->uio_offset >> 32); /* OffsetHigh */
smb_rq_wend(rqp);
smb_rq_bstart(rqp);
do {
mb_put_uint8(mbp, 0xee); /* mimic xp pad byte! */
error = mb_put_uio(mbp, uio, *len);
if (error)
break;
smb_rq_bend(rqp);
error = smb_rq_simple(rqp);
if (error)
break;
smb_rq_getreply(rqp, &mdp);
md_get_uint8(mdp, &wc);
if (wc != 6) {
error = EBADRPC;
break;
}
md_get_uint8(mdp, NULL);
md_get_uint8(mdp, NULL);
md_get_uint16le(mdp, NULL);
md_get_uint16le(mdp, &resid);
*rresid = resid;
} while(0);
smb_rq_done(rqp);
return (error);
}
static __inline int
smb_smb_read(struct smb_share *ssp, u_int16_t fid,
int *len, int *rresid, struct uio *uio, struct smb_cred *scred)
@ -496,6 +666,9 @@ smb_smb_read(struct smb_share *ssp, u_int16_t fid,
u_int8_t wc;
int error, rlen, blksz;
if (SSTOVC(ssp)->vc_sopt.sv_caps & SMB_CAP_LARGE_READX)
return (smb_smb_readx(ssp, fid, len, rresid, uio, scred));
error = smb_rq_alloc(SSTOCP(ssp), SMB_COM_READ, scred, &rqp);
if (error)
return error;
@ -571,6 +744,9 @@ smb_smb_write(struct smb_share *ssp, u_int16_t fid, int *len, int *rresid,
u_int8_t wc;
int error, blksz;
if (*len && SSTOVC(ssp)->vc_sopt.sv_caps & SMB_CAP_LARGE_WRITEX)
return (smb_smb_writex(ssp, fid, len, rresid, uio, scred));
blksz = SSTOVC(ssp)->vc_txmax - SMB_HDRLEN - 16;
if (blksz > 0xffff)
blksz = 0xffff;