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authorLinus Torvalds <torvalds@linux-foundation.org>2021-06-30 06:18:16 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2021-06-30 06:18:16 +0300
commitbbd91626f71c1582301044f5942751eeb4ca98ba (patch)
tree8d18269418d20d92cfcbf7b24b37ad4566b8ebb9 /fs
parentb97902b62ae8d5bdd20f56278d8083b4324bf7b5 (diff)
parent0fa757b5d3ea6e3d3d59f0e0d34c8214b8643b8f (diff)
downloadlinux-bbd91626f71c1582301044f5942751eeb4ca98ba.tar.xz
Merge tag '5.14-rc-smb3-fixes-part1' of git://git.samba.org/sfrench/cifs-2.6
Pull cifs updates from Steve French: - improve fallocate emulation - DFS fixes - minor multichannel fixes - various cleanup patches, many to address Coverity warnings * tag '5.14-rc-smb3-fixes-part1' of git://git.samba.org/sfrench/cifs-2.6: (38 commits) smb3: prevent races updating CurrentMid cifs: fix missing spinlock around update to ses->status cifs: missing null pointer check in cifs_mount smb3: fix possible access to uninitialized pointer to DACL cifs: missing null check for newinode pointer cifs: remove two cases where rc is set unnecessarily in sid_to_id SMB3: Add new info level for query directory cifs: fix NULL dereference in smb2_check_message() smbdirect: missing rc checks while waiting for rdma events cifs: Avoid field over-reading memcpy() smb311: remove dead code for non compounded posix query info cifs: fix SMB1 error path in cifs_get_file_info_unix smb3: fix uninitialized value for port in witness protocol move cifs: fix unneeded null check cifs: use SPDX-Licence-Identifier cifs: convert list_for_each to entry variant in cifs_debug.c cifs: convert list_for_each to entry variant in smb2misc.c cifs: avoid extra calls in posix_info_parse cifs: retry lookup and readdir when EAGAIN is returned. cifs: fix check of dfs interlinks ...
Diffstat (limited to 'fs')
-rw-r--r--fs/cifs/Kconfig6
-rw-r--r--fs/cifs/Makefile8
-rw-r--r--fs/cifs/asn1.c623
-rw-r--r--fs/cifs/cache.c14
-rw-r--r--fs/cifs/cifs_debug.c24
-rw-r--r--fs/cifs/cifs_debug.h2
-rw-r--r--fs/cifs/cifs_dfs_ref.c2
-rw-r--r--fs/cifs/cifs_fs_sb.h18
-rw-r--r--fs/cifs/cifs_ioctl.h11
-rw-r--r--fs/cifs/cifs_spnego.c14
-rw-r--r--fs/cifs/cifs_spnego.h14
-rw-r--r--fs/cifs/cifs_spnego_negtokeninit.asn140
-rw-r--r--fs/cifs/cifs_swn.c10
-rw-r--r--fs/cifs/cifsacl.c18
-rw-r--r--fs/cifs/cifsacl.h15
-rw-r--r--fs/cifs/cifsencrypt.c14
-rw-r--r--fs/cifs/cifsfs.c14
-rw-r--r--fs/cifs/cifsfs.h14
-rw-r--r--fs/cifs/cifsglob.h20
-rw-r--r--fs/cifs/cifspdu.h14
-rw-r--r--fs/cifs/cifsproto.h14
-rw-r--r--fs/cifs/cifssmb.c16
-rw-r--r--fs/cifs/connect.c159
-rw-r--r--fs/cifs/dfs_cache.c1079
-rw-r--r--fs/cifs/dfs_cache.h45
-rw-r--r--fs/cifs/dir.c27
-rw-r--r--fs/cifs/dns_resolve.c14
-rw-r--r--fs/cifs/dns_resolve.h14
-rw-r--r--fs/cifs/export.c14
-rw-r--r--fs/cifs/file.c14
-rw-r--r--fs/cifs/fscache.c14
-rw-r--r--fs/cifs/fscache.h14
-rw-r--r--fs/cifs/inode.c19
-rw-r--r--fs/cifs/ioctl.c14
-rw-r--r--fs/cifs/link.c14
-rw-r--r--fs/cifs/misc.c14
-rw-r--r--fs/cifs/netlink.c2
-rw-r--r--fs/cifs/ntlmssp.h14
-rw-r--r--fs/cifs/readdir.c16
-rw-r--r--fs/cifs/rfc1002pdu.h14
-rw-r--r--fs/cifs/sess.c16
-rw-r--r--fs/cifs/smb2file.c14
-rw-r--r--fs/cifs/smb2glob.h11
-rw-r--r--fs/cifs/smb2inode.c14
-rw-r--r--fs/cifs/smb2maperror.c14
-rw-r--r--fs/cifs/smb2misc.c52
-rw-r--r--fs/cifs/smb2ops.c140
-rw-r--r--fs/cifs/smb2pdu.c49
-rw-r--r--fs/cifs/smb2pdu.h53
-rw-r--r--fs/cifs/smb2proto.h16
-rw-r--r--fs/cifs/smb2status.h14
-rw-r--r--fs/cifs/smb2transport.c26
-rw-r--r--fs/cifs/smbdirect.c14
-rw-r--r--fs/cifs/smberr.h14
-rw-r--r--fs/cifs/smbfsctl.h14
-rw-r--r--fs/cifs/transport.c14
-rw-r--r--fs/cifs/xattr.c14
57 files changed, 966 insertions, 1949 deletions
diff --git a/fs/cifs/Kconfig b/fs/cifs/Kconfig
index bf52e9326ebe..7364950a9ef4 100644
--- a/fs/cifs/Kconfig
+++ b/fs/cifs/Kconfig
@@ -19,6 +19,8 @@ config CIFS
select CRYPTO_LIB_DES
select KEYS
select DNS_RESOLVER
+ select ASN1
+ select OID_REGISTRY
help
This is the client VFS module for the SMB3 family of NAS protocols,
(including support for the most recent, most secure dialect SMB3.1.1)
@@ -57,6 +59,7 @@ config CIFS
config CIFS_STATS2
bool "Extended statistics"
depends on CIFS
+ default y
help
Enabling this option will allow more detailed statistics on SMB
request timing to be displayed in /proc/fs/cifs/DebugData and also
@@ -65,8 +68,7 @@ config CIFS_STATS2
for more details. These additional statistics may have a minor effect
on performance and memory utilization.
- Unless you are a developer or are doing network performance analysis
- or tuning, say N.
+ If unsure, say Y.
config CIFS_ALLOW_INSECURE_LEGACY
bool "Support legacy servers which use less secure dialects"
diff --git a/fs/cifs/Makefile b/fs/cifs/Makefile
index 3ee3b7de4ded..87fcacdf3de7 100644
--- a/fs/cifs/Makefile
+++ b/fs/cifs/Makefile
@@ -6,12 +6,16 @@ ccflags-y += -I$(src) # needed for trace events
obj-$(CONFIG_CIFS) += cifs.o
cifs-y := trace.o cifsfs.o cifssmb.o cifs_debug.o connect.o dir.o file.o \
- inode.o link.o misc.o netmisc.o smbencrypt.o transport.o asn1.o \
+ inode.o link.o misc.o netmisc.o smbencrypt.o transport.o \
cifs_unicode.o nterr.o cifsencrypt.o \
readdir.o ioctl.o sess.o export.o smb1ops.o unc.o winucase.o \
smb2ops.o smb2maperror.o smb2transport.o \
smb2misc.o smb2pdu.o smb2inode.o smb2file.o cifsacl.o fs_context.o \
- dns_resolve.o
+ dns_resolve.o cifs_spnego_negtokeninit.asn1.o asn1.o
+
+$(obj)/asn1.o: $(obj)/cifs_spnego_negtokeninit.asn1.h
+
+$(obj)/cifs_spnego_negtokeninit.asn1.o: $(obj)/cifs_spnego_negtokeninit.asn1.c $(obj)/cifs_spnego_negtokeninit.asn1.h
cifs-$(CONFIG_CIFS_XATTR) += xattr.o
diff --git a/fs/cifs/asn1.c b/fs/cifs/asn1.c
index 3150c19cdc2f..b5724ef9f182 100644
--- a/fs/cifs/asn1.c
+++ b/fs/cifs/asn1.c
@@ -1,612 +1,63 @@
// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * The ASB.1/BER parsing code is derived from ip_nat_snmp_basic.c which was in
- * turn derived from the gxsnmp package by Gregory McLean & Jochen Friedrich
- *
- * Copyright (c) 2000 RP Internet (www.rpi.net.au).
- */
#include <linux/module.h>
-#include <linux/types.h>
#include <linux/kernel.h>
-#include <linux/mm.h>
-#include <linux/slab.h>
-#include "cifspdu.h"
+#include <linux/oid_registry.h>
#include "cifsglob.h"
#include "cifs_debug.h"
#include "cifsproto.h"
+#include "cifs_spnego_negtokeninit.asn1.h"
-/*****************************************************************************
- *
- * Basic ASN.1 decoding routines (gxsnmp author Dirk Wisse)
- *
- *****************************************************************************/
-
-/* Class */
-#define ASN1_UNI 0 /* Universal */
-#define ASN1_APL 1 /* Application */
-#define ASN1_CTX 2 /* Context */
-#define ASN1_PRV 3 /* Private */
-
-/* Tag */
-#define ASN1_EOC 0 /* End Of Contents or N/A */
-#define ASN1_BOL 1 /* Boolean */
-#define ASN1_INT 2 /* Integer */
-#define ASN1_BTS 3 /* Bit String */
-#define ASN1_OTS 4 /* Octet String */
-#define ASN1_NUL 5 /* Null */
-#define ASN1_OJI 6 /* Object Identifier */
-#define ASN1_OJD 7 /* Object Description */
-#define ASN1_EXT 8 /* External */
-#define ASN1_ENUM 10 /* Enumerated */
-#define ASN1_SEQ 16 /* Sequence */
-#define ASN1_SET 17 /* Set */
-#define ASN1_NUMSTR 18 /* Numerical String */
-#define ASN1_PRNSTR 19 /* Printable String */
-#define ASN1_TEXSTR 20 /* Teletext String */
-#define ASN1_VIDSTR 21 /* Video String */
-#define ASN1_IA5STR 22 /* IA5 String */
-#define ASN1_UNITIM 23 /* Universal Time */
-#define ASN1_GENTIM 24 /* General Time */
-#define ASN1_GRASTR 25 /* Graphical String */
-#define ASN1_VISSTR 26 /* Visible String */
-#define ASN1_GENSTR 27 /* General String */
-
-/* Primitive / Constructed methods*/
-#define ASN1_PRI 0 /* Primitive */
-#define ASN1_CON 1 /* Constructed */
-
-/*
- * Error codes.
- */
-#define ASN1_ERR_NOERROR 0
-#define ASN1_ERR_DEC_EMPTY 2
-#define ASN1_ERR_DEC_EOC_MISMATCH 3
-#define ASN1_ERR_DEC_LENGTH_MISMATCH 4
-#define ASN1_ERR_DEC_BADVALUE 5
-
-#define SPNEGO_OID_LEN 7
-#define NTLMSSP_OID_LEN 10
-#define KRB5_OID_LEN 7
-#define KRB5U2U_OID_LEN 8
-#define MSKRB5_OID_LEN 7
-static unsigned long SPNEGO_OID[7] = { 1, 3, 6, 1, 5, 5, 2 };
-static unsigned long NTLMSSP_OID[10] = { 1, 3, 6, 1, 4, 1, 311, 2, 2, 10 };
-static unsigned long KRB5_OID[7] = { 1, 2, 840, 113554, 1, 2, 2 };
-static unsigned long KRB5U2U_OID[8] = { 1, 2, 840, 113554, 1, 2, 2, 3 };
-static unsigned long MSKRB5_OID[7] = { 1, 2, 840, 48018, 1, 2, 2 };
-
-/*
- * ASN.1 context.
- */
-struct asn1_ctx {
- int error; /* Error condition */
- unsigned char *pointer; /* Octet just to be decoded */
- unsigned char *begin; /* First octet */
- unsigned char *end; /* Octet after last octet */
-};
-
-/*
- * Octet string (not null terminated)
- */
-struct asn1_octstr {
- unsigned char *data;
- unsigned int len;
-};
-
-static void
-asn1_open(struct asn1_ctx *ctx, unsigned char *buf, unsigned int len)
-{
- ctx->begin = buf;
- ctx->end = buf + len;
- ctx->pointer = buf;
- ctx->error = ASN1_ERR_NOERROR;
-}
-
-static unsigned char
-asn1_octet_decode(struct asn1_ctx *ctx, unsigned char *ch)
-{
- if (ctx->pointer >= ctx->end) {
- ctx->error = ASN1_ERR_DEC_EMPTY;
- return 0;
- }
- *ch = *(ctx->pointer)++;
- return 1;
-}
-
-#if 0 /* will be needed later by spnego decoding/encoding of ntlmssp */
-static unsigned char
-asn1_enum_decode(struct asn1_ctx *ctx, __le32 *val)
-{
- unsigned char ch;
-
- if (ctx->pointer >= ctx->end) {
- ctx->error = ASN1_ERR_DEC_EMPTY;
- return 0;
- }
-
- ch = *(ctx->pointer)++; /* ch has 0xa, ptr points to length octet */
- if ((ch) == ASN1_ENUM) /* if ch value is ENUM, 0xa */
- *val = *(++(ctx->pointer)); /* value has enum value */
- else
- return 0;
-
- ctx->pointer++;
- return 1;
-}
-#endif
-
-static unsigned char
-asn1_tag_decode(struct asn1_ctx *ctx, unsigned int *tag)
-{
- unsigned char ch;
-
- *tag = 0;
-
- do {
- if (!asn1_octet_decode(ctx, &ch))
- return 0;
- *tag <<= 7;
- *tag |= ch & 0x7F;
- } while ((ch & 0x80) == 0x80);
- return 1;
-}
-
-static unsigned char
-asn1_id_decode(struct asn1_ctx *ctx,
- unsigned int *cls, unsigned int *con, unsigned int *tag)
-{
- unsigned char ch;
-
- if (!asn1_octet_decode(ctx, &ch))
- return 0;
-
- *cls = (ch & 0xC0) >> 6;
- *con = (ch & 0x20) >> 5;
- *tag = (ch & 0x1F);
-
- if (*tag == 0x1F) {
- if (!asn1_tag_decode(ctx, tag))
- return 0;
- }
- return 1;
-}
-
-static unsigned char
-asn1_length_decode(struct asn1_ctx *ctx, unsigned int *def, unsigned int *len)
-{
- unsigned char ch, cnt;
-
- if (!asn1_octet_decode(ctx, &ch))
- return 0;
-
- if (ch == 0x80)
- *def = 0;
- else {
- *def = 1;
-
- if (ch < 0x80)
- *len = ch;
- else {
- cnt = (unsigned char) (ch & 0x7F);
- *len = 0;
-
- while (cnt > 0) {
- if (!asn1_octet_decode(ctx, &ch))
- return 0;
- *len <<= 8;
- *len |= ch;
- cnt--;
- }
- }
- }
-
- /* don't trust len bigger than ctx buffer */
- if (*len > ctx->end - ctx->pointer)
- return 0;
-
- return 1;
-}
-
-static unsigned char
-asn1_header_decode(struct asn1_ctx *ctx,
- unsigned char **eoc,
- unsigned int *cls, unsigned int *con, unsigned int *tag)
-{
- unsigned int def = 0;
- unsigned int len = 0;
-
- if (!asn1_id_decode(ctx, cls, con, tag))
- return 0;
-
- if (!asn1_length_decode(ctx, &def, &len))
- return 0;
-
- /* primitive shall be definite, indefinite shall be constructed */
- if (*con == ASN1_PRI && !def)
- return 0;
-
- if (def)
- *eoc = ctx->pointer + len;
- else
- *eoc = NULL;
- return 1;
-}
-
-static unsigned char
-asn1_eoc_decode(struct asn1_ctx *ctx, unsigned char *eoc)
+int
+decode_negTokenInit(unsigned char *security_blob, int length,
+ struct TCP_Server_Info *server)
{
- unsigned char ch;
-
- if (eoc == NULL) {
- if (!asn1_octet_decode(ctx, &ch))
- return 0;
-
- if (ch != 0x00) {
- ctx->error = ASN1_ERR_DEC_EOC_MISMATCH;
- return 0;
- }
-
- if (!asn1_octet_decode(ctx, &ch))
- return 0;
-
- if (ch != 0x00) {
- ctx->error = ASN1_ERR_DEC_EOC_MISMATCH;
- return 0;
- }
- return 1;
- } else {
- if (ctx->pointer != eoc) {
- ctx->error = ASN1_ERR_DEC_LENGTH_MISMATCH;
- return 0;
- }
+ if (asn1_ber_decoder(&cifs_spnego_negtokeninit_decoder, server,
+ security_blob, length) == 0)
return 1;
- }
-}
-
-/* static unsigned char asn1_null_decode(struct asn1_ctx *ctx,
- unsigned char *eoc)
-{
- ctx->pointer = eoc;
- return 1;
-}
-
-static unsigned char asn1_long_decode(struct asn1_ctx *ctx,
- unsigned char *eoc, long *integer)
-{
- unsigned char ch;
- unsigned int len;
-
- if (!asn1_octet_decode(ctx, &ch))
- return 0;
-
- *integer = (signed char) ch;
- len = 1;
-
- while (ctx->pointer < eoc) {
- if (++len > sizeof(long)) {
- ctx->error = ASN1_ERR_DEC_BADVALUE;
- return 0;
- }
-
- if (!asn1_octet_decode(ctx, &ch))
- return 0;
-
- *integer <<= 8;
- *integer |= ch;
- }
- return 1;
-}
-
-static unsigned char asn1_uint_decode(struct asn1_ctx *ctx,
- unsigned char *eoc,
- unsigned int *integer)
-{
- unsigned char ch;
- unsigned int len;
-
- if (!asn1_octet_decode(ctx, &ch))
- return 0;
-
- *integer = ch;
- if (ch == 0)
- len = 0;
else
- len = 1;
-
- while (ctx->pointer < eoc) {
- if (++len > sizeof(unsigned int)) {
- ctx->error = ASN1_ERR_DEC_BADVALUE;
- return 0;
- }
-
- if (!asn1_octet_decode(ctx, &ch))
- return 0;
-
- *integer <<= 8;
- *integer |= ch;
- }
- return 1;
-}
-
-static unsigned char asn1_ulong_decode(struct asn1_ctx *ctx,
- unsigned char *eoc,
- unsigned long *integer)
-{
- unsigned char ch;
- unsigned int len;
-
- if (!asn1_octet_decode(ctx, &ch))
return 0;
-
- *integer = ch;
- if (ch == 0)
- len = 0;
- else
- len = 1;
-
- while (ctx->pointer < eoc) {
- if (++len > sizeof(unsigned long)) {
- ctx->error = ASN1_ERR_DEC_BADVALUE;
- return 0;
- }
-
- if (!asn1_octet_decode(ctx, &ch))
- return 0;
-
- *integer <<= 8;
- *integer |= ch;
- }
- return 1;
}
-static unsigned char
-asn1_octets_decode(struct asn1_ctx *ctx,
- unsigned char *eoc,
- unsigned char **octets, unsigned int *len)
+int cifs_gssapi_this_mech(void *context, size_t hdrlen,
+ unsigned char tag, const void *value, size_t vlen)
{
- unsigned char *ptr;
-
- *len = 0;
-
- *octets = kmalloc(eoc - ctx->pointer, GFP_ATOMIC);
- if (*octets == NULL) {
- return 0;
- }
-
- ptr = *octets;
- while (ctx->pointer < eoc) {
- if (!asn1_octet_decode(ctx, (unsigned char *) ptr++)) {
- kfree(*octets);
- *octets = NULL;
- return 0;
- }
- (*len)++;
- }
- return 1;
-} */
-
-static unsigned char
-asn1_subid_decode(struct asn1_ctx *ctx, unsigned long *subid)
-{
- unsigned char ch;
-
- *subid = 0;
-
- do {
- if (!asn1_octet_decode(ctx, &ch))
- return 0;
-
- *subid <<= 7;
- *subid |= ch & 0x7F;
- } while ((ch & 0x80) == 0x80);
- return 1;
-}
-
-static int
-asn1_oid_decode(struct asn1_ctx *ctx,
- unsigned char *eoc, unsigned long **oid, unsigned int *len)
-{
- unsigned long subid;
- unsigned int size;
- unsigned long *optr;
-
- size = eoc - ctx->pointer + 1;
-
- /* first subid actually encodes first two subids */
- if (size < 2 || size > UINT_MAX/sizeof(unsigned long))
- return 0;
-
- *oid = kmalloc_array(size, sizeof(unsigned long), GFP_ATOMIC);
- if (*oid == NULL)
- return 0;
-
- optr = *oid;
-
- if (!asn1_subid_decode(ctx, &subid)) {
- kfree(*oid);
- *oid = NULL;
- return 0;
- }
-
- if (subid < 40) {
- optr[0] = 0;
- optr[1] = subid;
- } else if (subid < 80) {
- optr[0] = 1;
- optr[1] = subid - 40;
- } else {
- optr[0] = 2;
- optr[1] = subid - 80;
- }
-
- *len = 2;
- optr += 2;
+ enum OID oid;
- while (ctx->pointer < eoc) {
- if (++(*len) > size) {
- ctx->error = ASN1_ERR_DEC_BADVALUE;
- kfree(*oid);
- *oid = NULL;
- return 0;
- }
+ oid = look_up_OID(value, vlen);
+ if (oid != OID_spnego) {
+ char buf[50];
- if (!asn1_subid_decode(ctx, optr++)) {
- kfree(*oid);
- *oid = NULL;
- return 0;
- }
+ sprint_oid(value, vlen, buf, sizeof(buf));
+ cifs_dbg(FYI, "Error decoding negTokenInit header: unexpected OID %s\n",
+ buf);
+ return -EBADMSG;
}
- return 1;
+ return 0;
}
-static int
-compare_oid(unsigned long *oid1, unsigned int oid1len,
- unsigned long *oid2, unsigned int oid2len)
+int cifs_neg_token_init_mech_type(void *context, size_t hdrlen,
+ unsigned char tag,
+ const void *value, size_t vlen)
{
- unsigned int i;
+ struct TCP_Server_Info *server = context;
+ enum OID oid;
- if (oid1len != oid2len)
- return 0;
+ oid = look_up_OID(value, vlen);
+ if (oid == OID_mskrb5)
+ server->sec_mskerberos = true;
+ else if (oid == OID_krb5u2u)
+ server->sec_kerberosu2u = true;
+ else if (oid == OID_krb5)
+ server->sec_kerberos = true;
+ else if (oid == OID_ntlmssp)
+ server->sec_ntlmssp = true;
else {
- for (i = 0; i < oid1len; i++) {
- if (oid1[i] != oid2[i])
- return 0;
- }
- return 1;
- }
-}
-
- /* BB check for endian conversion issues here */
-
-int
-decode_negTokenInit(unsigned char *security_blob, int length,
- struct TCP_Server_Info *server)
-{
- struct asn1_ctx ctx;
- unsigned char *end;
- unsigned char *sequence_end;
- unsigned long *oid = NULL;
- unsigned int cls, con, tag, oidlen, rc;
-
- /* cifs_dump_mem(" Received SecBlob ", security_blob, length); */
-
- asn1_open(&ctx, security_blob, length);
+ char buf[50];
- /* GSSAPI header */
- if (asn1_header_decode(&ctx, &end, &cls, &con, &tag) == 0) {
- cifs_dbg(FYI, "Error decoding negTokenInit header\n");
- return 0;
- } else if ((cls != ASN1_APL) || (con != ASN1_CON)
- || (tag != ASN1_EOC)) {
- cifs_dbg(FYI, "cls = %d con = %d tag = %d\n", cls, con, tag);
- return 0;
+ sprint_oid(value, vlen, buf, sizeof(buf));
+ cifs_dbg(FYI, "Decoding negTokenInit: unsupported OID %s\n",
+ buf);
}
-
- /* Check for SPNEGO OID -- remember to free obj->oid */
- rc = asn1_header_decode(&ctx, &end, &cls, &con, &tag);
- if (rc) {
- if ((tag == ASN1_OJI) && (con == ASN1_PRI) &&
- (cls == ASN1_UNI)) {
- rc = asn1_oid_decode(&ctx, end, &oid, &oidlen);
- if (rc) {
- rc = compare_oid(oid, oidlen, SPNEGO_OID,
- SPNEGO_OID_LEN);
- kfree(oid);
- }
- } else
- rc = 0;
- }
-
- /* SPNEGO OID not present or garbled -- bail out */
- if (!rc) {
- cifs_dbg(FYI, "Error decoding negTokenInit header\n");
- return 0;
- }
-
- /* SPNEGO */
- if (asn1_header_decode(&ctx, &end, &cls, &con, &tag) == 0) {
- cifs_dbg(FYI, "Error decoding negTokenInit\n");
- return 0;
- } else if ((cls != ASN1_CTX) || (con != ASN1_CON)
- || (tag != ASN1_EOC)) {
- cifs_dbg(FYI, "cls = %d con = %d tag = %d end = %p exit 0\n",
- cls, con, tag, end);
- return 0;
- }
-
- /* negTokenInit */
- if (asn1_header_decode(&ctx, &end, &cls, &con, &tag) == 0) {
- cifs_dbg(FYI, "Error decoding negTokenInit\n");
- return 0;
- } else if ((cls != ASN1_UNI) || (con != ASN1_CON)
- || (tag != ASN1_SEQ)) {
- cifs_dbg(FYI, "cls = %d con = %d tag = %d end = %p exit 1\n",
- cls, con, tag, end);
- return 0;
- }
-
- /* sequence */
- if (asn1_header_decode(&ctx, &end, &cls, &con, &tag) == 0) {
- cifs_dbg(FYI, "Error decoding 2nd part of negTokenInit\n");
- return 0;
- } else if ((cls != ASN1_CTX) || (con != ASN1_CON)
- || (tag != ASN1_EOC)) {
- cifs_dbg(FYI, "cls = %d con = %d tag = %d end = %p exit 0\n",
- cls, con, tag, end);
- return 0;
- }
-
- /* sequence of */
- if (asn1_header_decode
- (&ctx, &sequence_end, &cls, &con, &tag) == 0) {
- cifs_dbg(FYI, "Error decoding 2nd part of negTokenInit\n");
- return 0;
- } else if ((cls != ASN1_UNI) || (con != ASN1_CON)
- || (tag != ASN1_SEQ)) {
- cifs_dbg(FYI, "cls = %d con = %d tag = %d sequence_end = %p exit 1\n",
- cls, con, tag, sequence_end);
- return 0;
- }
-
- /* list of security mechanisms */
- while (!asn1_eoc_decode(&ctx, sequence_end)) {
- rc = asn1_header_decode(&ctx, &end, &cls, &con, &tag);
- if (!rc) {
- cifs_dbg(FYI, "Error decoding negTokenInit hdr exit2\n");
- return 0;
- }
- if ((tag == ASN1_OJI) && (con == ASN1_PRI)) {
- if (asn1_oid_decode(&ctx, end, &oid, &oidlen)) {
-
- cifs_dbg(FYI, "OID len = %d oid = 0x%lx 0x%lx 0x%lx 0x%lx\n",
- oidlen, *oid, *(oid + 1), *(oid + 2),
- *(oid + 3));
-
- if (compare_oid(oid, oidlen, MSKRB5_OID,
- MSKRB5_OID_LEN))
- server->sec_mskerberos = true;
- else if (compare_oid(oid, oidlen, KRB5U2U_OID,
- KRB5U2U_OID_LEN))
- server->sec_kerberosu2u = true;
- else if (compare_oid(oid, oidlen, KRB5_OID,
- KRB5_OID_LEN))
- server->sec_kerberos = true;
- else if (compare_oid(oid, oidlen, NTLMSSP_OID,
- NTLMSSP_OID_LEN))
- server->sec_ntlmssp = true;
-
- kfree(oid);
- }
- } else {
- cifs_dbg(FYI, "Should be an oid what is going on?\n");
- }
- }
-
- /*
- * We currently ignore anything at the end of the SPNEGO blob after
- * the mechTypes have been parsed, since none of that info is
- * used at the moment.
- */
- return 1;
+ return 0;
}
diff --git a/fs/cifs/cache.c b/fs/cifs/cache.c
index 488fe0ffc1ef..8a3b30ec860c 100644
--- a/fs/cifs/cache.c
+++ b/fs/cifs/cache.c
@@ -1,22 +1,10 @@
+// SPDX-License-Identifier: LGPL-2.1
/*
* fs/cifs/cache.c - CIFS filesystem cache index structure definitions
*
* Copyright (c) 2010 Novell, Inc.
* Authors(s): Suresh Jayaraman (sjayaraman@suse.de>
*
- * This library is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published
- * by the Free Software Foundation; either version 2.1 of the License, or
- * (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
- * the GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "fscache.h"
#include "cifs_debug.h"
diff --git a/fs/cifs/cifs_debug.c b/fs/cifs/cifs_debug.c
index 68e8e5b27841..8857ac7e7a14 100644
--- a/fs/cifs/cifs_debug.c
+++ b/fs/cifs/cifs_debug.c
@@ -50,7 +50,6 @@ void cifs_dump_detail(void *buf, struct TCP_Server_Info *server)
void cifs_dump_mids(struct TCP_Server_Info *server)
{
#ifdef CONFIG_CIFS_DEBUG2
- struct list_head *tmp;
struct mid_q_entry *mid_entry;
if (server == NULL)
@@ -58,8 +57,7 @@ void cifs_dump_mids(struct TCP_Server_Info *server)
cifs_dbg(VFS, "Dump pending requests:\n");
spin_lock(&GlobalMid_Lock);
- list_for_each(tmp, &server->pending_mid_q) {
- mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
+ list_for_each_entry(mid_entry, &server->pending_mid_q, qhead) {
cifs_dbg(VFS, "State: %d Cmd: %d Pid: %d Cbdata: %p Mid %llu\n",
mid_entry->mid_state,
le16_to_cpu(mid_entry->command),
@@ -168,7 +166,7 @@ cifs_dump_iface(struct seq_file *m, struct cifs_server_iface *iface)
static int cifs_debug_files_proc_show(struct seq_file *m, void *v)
{
- struct list_head *stmp, *tmp, *tmp1, *tmp2;
+ struct list_head *tmp, *tmp1, *tmp2;
struct TCP_Server_Info *server;
struct cifs_ses *ses;
struct cifs_tcon *tcon;
@@ -183,9 +181,7 @@ static int cifs_debug_files_proc_show(struct seq_file *m, void *v)
seq_printf(m, " <filename>\n");
#endif /* CIFS_DEBUG2 */
spin_lock(&cifs_tcp_ses_lock);
- list_for_each(stmp, &cifs_tcp_ses_list) {
- server = list_entry(stmp, struct TCP_Server_Info,
- tcp_ses_list);
+ list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
list_for_each(tmp, &server->smb_ses_list) {
ses = list_entry(tmp, struct cifs_ses, smb_ses_list);
list_for_each(tmp1, &ses->tcon_list) {
@@ -220,7 +216,7 @@ static int cifs_debug_files_proc_show(struct seq_file *m, void *v)
static int cifs_debug_data_proc_show(struct seq_file *m, void *v)
{
- struct list_head *tmp1, *tmp2, *tmp3;
+ struct list_head *tmp2, *tmp3;
struct mid_q_entry *mid_entry;
struct TCP_Server_Info *server;
struct cifs_ses *ses;
@@ -278,11 +274,7 @@ static int cifs_debug_data_proc_show(struct seq_file *m, void *v)
c = 0;
spin_lock(&cifs_tcp_ses_lock);
- list_for_each(tmp1, &cifs_tcp_ses_list) {
- server = list_entry(tmp1, struct TCP_Server_Info,
- tcp_ses_list);
-
- /* channel info will be printed as a part of sessions below */
+ list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
if (server->is_channel)
continue;
@@ -563,7 +555,7 @@ static int cifs_stats_proc_show(struct seq_file *m, void *v)
#ifdef CONFIG_CIFS_STATS2
int j;
#endif /* STATS2 */
- struct list_head *tmp1, *tmp2, *tmp3;
+ struct list_head *tmp2, *tmp3;
struct TCP_Server_Info *server;
struct cifs_ses *ses;
struct cifs_tcon *tcon;
@@ -594,9 +586,7 @@ static int cifs_stats_proc_show(struct seq_file *m, void *v)
i = 0;
spin_lock(&cifs_tcp_ses_lock);
- list_for_each(tmp1, &cifs_tcp_ses_list) {
- server = list_entry(tmp1, struct TCP_Server_Info,
- tcp_ses_list);
+ list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
seq_printf(m, "\nMax requests in flight: %d", server->max_in_flight);
#ifdef CONFIG_CIFS_STATS2
seq_puts(m, "\nTotal time spent processing by command. Time ");
diff --git a/fs/cifs/cifs_debug.h b/fs/cifs/cifs_debug.h
index 5e66dab712d0..ee4ea2b60c0f 100644
--- a/fs/cifs/cifs_debug.h
+++ b/fs/cifs/cifs_debug.h
@@ -3,7 +3,7 @@
*
* Copyright (c) International Business Machines Corp., 2000,2002
* Modified by Steve French (sfrench@us.ibm.com)
-*/
+ */
#ifndef _H_CIFS_DEBUG
#define _H_CIFS_DEBUG
diff --git a/fs/cifs/cifs_dfs_ref.c b/fs/cifs/cifs_dfs_ref.c
index c87c37cf2914..ec57cdb1590f 100644
--- a/fs/cifs/cifs_dfs_ref.c
+++ b/fs/cifs/cifs_dfs_ref.c
@@ -125,7 +125,7 @@ cifs_build_devname(char *nodename, const char *prepath)
* @sb_mountdata: parent/root DFS mount options (template)
* @fullpath: full path in UNC format
* @ref: optional server's referral
- *
+ * @devname: return the built cifs device name if passed pointer not NULL
* creates mount options for submount based on template options sb_mountdata
* and replacing unc,ip,prefixpath options with ones we've got form ref_unc.
*
diff --git a/fs/cifs/cifs_fs_sb.h b/fs/cifs/cifs_fs_sb.h
index 9c45b3a82ad9..4fd788586399 100644
--- a/fs/cifs/cifs_fs_sb.h
+++ b/fs/cifs/cifs_fs_sb.h
@@ -1,19 +1,10 @@
+/* SPDX-License-Identifier: LGPL-2.1 */
/*
* fs/cifs/cifs_fs_sb.h
*
* Copyright (c) International Business Machines Corp., 2002,2004
* Author(s): Steve French (sfrench@us.ibm.com)
*
- * This library is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published
- * by the Free Software Foundation; either version 2.1 of the License, or
- * (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
- * the GNU Lesser General Public License for more details.
- *
*/
#include <linux/rbtree.h>
@@ -72,11 +63,12 @@ struct cifs_sb_info {
char *prepath;
/*
- * Path initially provided by the mount call. We might connect
- * to something different via DFS but we want to keep it to do
- * failover properly.
+ * Canonical DFS path initially provided by the mount call. We might connect to something
+ * different via DFS but we want to keep it to do failover properly.
*/
char *origin_fullpath; /* \\HOST\SHARE\[OPTIONAL PATH] */
+ /* randomly generated 128-bit number for indexing dfs mount groups in referral cache */
+ uuid_t dfs_mount_id;
/*
* Indicate whether serverino option was turned off later
* (cifs_autodisable_serverino) in order to match new mounts.
diff --git a/fs/cifs/cifs_ioctl.h b/fs/cifs/cifs_ioctl.h
index 37fc7d6ac457..ef723be358af 100644
--- a/fs/cifs/cifs_ioctl.h
+++ b/fs/cifs/cifs_ioctl.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: LGPL-2.1 */
/*
* fs/cifs/cifs_ioctl.h
*
@@ -5,16 +6,6 @@
*
* Copyright (c) 2015 Steve French <steve.french@primarydata.com>
*
- * This library is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published
- * by the Free Software Foundation; either version 2.1 of the License, or
- * (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
- * the GNU Lesser General Public License for more details.
- *
*/
struct smb_mnt_fs_info {
diff --git a/fs/cifs/cifs_spnego.c b/fs/cifs/cifs_spnego.c
index 7b9b876b513b..8fa26a8530f8 100644
--- a/fs/cifs/cifs_spnego.c
+++ b/fs/cifs/cifs_spnego.c
@@ -1,22 +1,10 @@
+// SPDX-License-Identifier: LGPL-2.1
/*
* fs/cifs/cifs_spnego.c -- SPNEGO upcall management for CIFS
*
* Copyright (c) 2007 Red Hat, Inc.
* Author(s): Jeff Layton (jlayton@redhat.com)
*
- * This library is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published
- * by the Free Software Foundation; either version 2.1 of the License, or
- * (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
- * the GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/list.h>
diff --git a/fs/cifs/cifs_spnego.h b/fs/cifs/cifs_spnego.h
index 31bef9ee078b..31387d0ea32e 100644
--- a/fs/cifs/cifs_spnego.h
+++ b/fs/cifs/cifs_spnego.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: LGPL-2.1 */
/*
* fs/cifs/cifs_spnego.h -- SPNEGO upcall management for CIFS
*
@@ -5,19 +6,6 @@
* Author(s): Jeff Layton (jlayton@redhat.com)
* Steve French (sfrench@us.ibm.com)
*
- * This library is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published
- * by the Free Software Foundation; either version 2.1 of the License, or
- * (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
- * the GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef _CIFS_SPNEGO_H
diff --git a/fs/cifs/cifs_spnego_negtokeninit.asn1 b/fs/cifs/cifs_spnego_negtokeninit.asn1
new file mode 100644
index 000000000000..181c083887d5
--- /dev/null
+++ b/fs/cifs/cifs_spnego_negtokeninit.asn1
@@ -0,0 +1,40 @@
+GSSAPI ::=
+ [APPLICATION 0] IMPLICIT SEQUENCE {
+ thisMech
+ OBJECT IDENTIFIER ({cifs_gssapi_this_mech}),
+ negotiationToken
+ NegotiationToken
+ }
+
+MechType ::= OBJECT IDENTIFIER ({cifs_neg_token_init_mech_type})
+
+MechTypeList ::= SEQUENCE OF MechType
+
+NegHints ::= SEQUENCE {
+ hintName
+ [0] GeneralString OPTIONAL,
+ hintAddress
+ [1] OCTET STRING OPTIONAL
+ }
+
+NegTokenInit2 ::=
+ SEQUENCE {
+ mechTypes
+ [0] MechTypeList OPTIONAL,
+ reqFlags
+ [1] BIT STRING OPTIONAL,
+ mechToken
+ [2] OCTET STRING OPTIONAL,
+ negHints
+ [3] NegHints OPTIONAL,
+ mechListMIC
+ [3] OCTET STRING OPTIONAL
+ }
+
+NegotiationToken ::=
+ CHOICE {
+ negTokenInit
+ [0] NegTokenInit2,
+ negTokenTarg
+ [1] ANY
+ }
diff --git a/fs/cifs/cifs_swn.c b/fs/cifs/cifs_swn.c
index d829b8bf833e..93b47818c6c2 100644
--- a/fs/cifs/cifs_swn.c
+++ b/fs/cifs/cifs_swn.c
@@ -447,15 +447,13 @@ static int cifs_swn_store_swn_addr(const struct sockaddr_storage *new,
const struct sockaddr_storage *old,
struct sockaddr_storage *dst)
{
- __be16 port;
+ __be16 port = cpu_to_be16(CIFS_PORT);
if (old->ss_family == AF_INET) {
struct sockaddr_in *ipv4 = (struct sockaddr_in *)old;
port = ipv4->sin_port;
- }
-
- if (old->ss_family == AF_INET6) {
+ } else if (old->ss_family == AF_INET6) {
struct sockaddr_in6 *ipv6 = (struct sockaddr_in6 *)old;
port = ipv6->sin6_port;
@@ -465,9 +463,7 @@ static int cifs_swn_store_swn_addr(const struct sockaddr_storage *new,
struct sockaddr_in *ipv4 = (struct sockaddr_in *)new;
ipv4->sin_port = port;
- }
-
- if (new->ss_family == AF_INET6) {
+ } else if (new->ss_family == AF_INET6) {
struct sockaddr_in6 *ipv6 = (struct sockaddr_in6 *)new;
ipv6->sin6_port = port;
diff --git a/fs/cifs/cifsacl.c b/fs/cifs/cifsacl.c
index 784407f9280f..388eb536cff1 100644
--- a/fs/cifs/cifsacl.c
+++ b/fs/cifs/cifsacl.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: LGPL-2.1
/*
* fs/cifs/cifsacl.c
*
@@ -6,19 +7,6 @@
*
* Contains the routines for mapping CIFS/NTFS ACLs
*
- * This library is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published
- * by the Free Software Foundation; either version 2.1 of the License, or
- * (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
- * the GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/fs.h>
@@ -409,7 +397,6 @@ try_upcall_to_get_id:
saved_cred = override_creds(root_cred);
sidkey = request_key(&cifs_idmap_key_type, sidstr, "");
if (IS_ERR(sidkey)) {
- rc = -EINVAL;
cifs_dbg(FYI, "%s: Can't map SID %s to a %cid\n",
__func__, sidstr, sidtype == SIDOWNER ? 'u' : 'g');
goto out_revert_creds;
@@ -422,7 +409,6 @@ try_upcall_to_get_id:
*/
BUILD_BUG_ON(sizeof(uid_t) != sizeof(gid_t));
if (sidkey->datalen != sizeof(uid_t)) {
- rc = -EIO;
cifs_dbg(FYI, "%s: Downcall contained malformed key (datalen=%hu)\n",
__func__, sidkey->datalen);
key_invalidate(sidkey);
@@ -1308,7 +1294,7 @@ static int build_sec_desc(struct cifs_ntsd *pntsd, struct cifs_ntsd *pnntsd,
ndacl_ptr = (struct cifs_acl *)((char *)pnntsd + ndacloffset);
ndacl_ptr->revision =
dacloffset ? dacl_ptr->revision : cpu_to_le16(ACL_REVISION);
- ndacl_ptr->num_aces = dacl_ptr->num_aces;
+ ndacl_ptr->num_aces = dacl_ptr ? dacl_ptr->num_aces : 0;
if (uid_valid(uid)) { /* chown */
uid_t id;
diff --git a/fs/cifs/cifsacl.h b/fs/cifs/cifsacl.h
index d9e704979d99..f8292bcf8594 100644
--- a/fs/cifs/cifsacl.h
+++ b/fs/cifs/cifsacl.h
@@ -1,28 +1,15 @@
+/* SPDX-License-Identifier: LGPL-2.1 */
/*
* fs/cifs/cifsacl.h
*
* Copyright (c) International Business Machines Corp., 2007
* Author(s): Steve French (sfrench@us.ibm.com)
*
- * This library is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published
- * by the Free Software Foundation; either version 2.1 of the License, or
- * (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
- * the GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef _CIFSACL_H
#define _CIFSACL_H
-
#define NUM_AUTHS (6) /* number of authority fields */
#define SID_MAX_SUB_AUTHORITIES (15) /* max number of sub authority fields */
diff --git a/fs/cifs/cifsencrypt.c b/fs/cifs/cifsencrypt.c
index b8f1ff9a83f3..ecf15d845dbd 100644
--- a/fs/cifs/cifsencrypt.c
+++ b/fs/cifs/cifsencrypt.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: LGPL-2.1
/*
* fs/cifs/cifsencrypt.c
*
@@ -7,19 +8,6 @@
* Copyright (C) International Business Machines Corp., 2005,2013
* Author(s): Steve French (sfrench@us.ibm.com)
*
- * This library is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published
- * by the Free Software Foundation; either version 2.1 of the License, or
- * (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
- * the GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/fs.h>
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 2ffcb29d5c8f..9fb874dd8d24 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: LGPL-2.1
/*
* fs/cifs/cifsfs.c
*
@@ -6,19 +7,6 @@
*
* Common Internet FileSystem (CIFS) client
*
- * This library is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published
- * by the Free Software Foundation; either version 2.1 of the License, or
- * (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
- * the GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/* Note that BB means BUGBUG (ie something to fix eventually) */
diff --git a/fs/cifs/cifsfs.h b/fs/cifs/cifsfs.h
index 6beddb108ba0..177f3e7ab86d 100644
--- a/fs/cifs/cifsfs.h
+++ b/fs/cifs/cifsfs.h
@@ -1,22 +1,10 @@
+/* SPDX-License-Identifier: LGPL-2.1 */
/*
* fs/cifs/cifsfs.h
*
* Copyright (c) International Business Machines Corp., 2002, 2007
* Author(s): Steve French (sfrench@us.ibm.com)
*
- * This library is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published
- * by the Free Software Foundation; either version 2.1 of the License, or
- * (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
- * the GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef _CIFSFS_H
diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index 8488d7024462..3100f8b66e60 100644
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: LGPL-2.1 */
/*
* fs/cifs/cifsglob.h
*
@@ -5,16 +6,6 @@
* Author(s): Steve French (sfrench@us.ibm.com)
* Jeremy Allison (jra@samba.org)
*
- * This library is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published
- * by the Free Software Foundation; either version 2.1 of the License, or
- * (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
- * the GNU Lesser General Public License for more details.
- *
*/
#ifndef _CIFS_GLOB_H
#define _CIFS_GLOB_H
@@ -630,7 +621,7 @@ struct TCP_Server_Info {
/* SMB_COM_WRITE_RAW or SMB_COM_READ_RAW. */
unsigned int capabilities; /* selective disabling of caps by smb sess */
int timeAdj; /* Adjust for difference in server time zone in sec */
- __u64 CurrentMid; /* multiplex id - rotating counter */
+ __u64 CurrentMid; /* multiplex id - rotating counter, protected by GlobalMid_Lock */
char cryptkey[CIFS_CRYPTO_KEY_SIZE]; /* used by ntlm, ntlmv2 etc */
/* 16th byte of RFC1001 workstation name is always null */
char workstation_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL];
@@ -896,7 +887,7 @@ struct cifs_ses {
struct mutex session_mutex;
struct TCP_Server_Info *server; /* pointer to server info */
int ses_count; /* reference counter */
- enum statusEnum status;
+ enum statusEnum status; /* updates protected by GlobalMid_Lock */
unsigned overrideSecFlg; /* if non-zero override global sec flags */
char *serverOS; /* name of operating system underlying server */
char *serverNOS; /* name of network operating system of server */
@@ -1093,8 +1084,7 @@ struct cifs_tcon {
struct cached_fid crfid; /* Cached root fid */
/* BB add field for back pointer to sb struct(s)? */
#ifdef CONFIG_CIFS_DFS_UPCALL
- char *dfs_path;
- int remap:2;
+ char *dfs_path; /* canonical DFS path */
struct list_head ulist; /* cache update list */
#endif
};
@@ -1795,6 +1785,8 @@ require use of the stronger protocol */
* list operations on pending_mid_q and oplockQ
* updates to XID counters, multiplex id and SMB sequence numbers
* list operations on global DnotifyReqList
+ * updates to ses->status
+ * updates to server->CurrentMid
* tcp_ses_lock protects:
* list operations on tcp and SMB session lists
* tcon->open_file_lock protects the list of open files hanging off the tcon
diff --git a/fs/cifs/cifspdu.h b/fs/cifs/cifspdu.h
index 554d64fe171e..0923f72d27e9 100644
--- a/fs/cifs/cifspdu.h
+++ b/fs/cifs/cifspdu.h
@@ -1,22 +1,10 @@
+/* SPDX-License-Identifier: LGPL-2.1 */
/*
* fs/cifs/cifspdu.h
*
* Copyright (c) International Business Machines Corp., 2002,2009
* Author(s): Steve French (sfrench@us.ibm.com)
*
- * This library is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published
- * by the Free Software Foundation; either version 2.1 of the License, or
- * (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
- * the GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef _CIFSPDU_H
diff --git a/fs/cifs/cifsproto.h b/fs/cifs/cifsproto.h
index d30cba44ba29..e0def0f0714b 100644
--- a/fs/cifs/cifsproto.h
+++ b/fs/cifs/cifsproto.h
@@ -1,22 +1,10 @@
+/* SPDX-License-Identifier: LGPL-2.1 */
/*
* fs/cifs/cifsproto.h
*
* Copyright (c) International Business Machines Corp., 2002,2008
* Author(s): Steve French (sfrench@us.ibm.com)
*
- * This library is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published
- * by the Free Software Foundation; either version 2.1 of the License, or
- * (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
- * the GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef _CIFSPROTO_H
#define _CIFSPROTO_H
diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
index 41f74163cc1c..58ebec4d4413 100644
--- a/fs/cifs/cifssmb.c
+++ b/fs/cifs/cifssmb.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: LGPL-2.1
/*
* fs/cifs/cifssmb.c
*
@@ -6,19 +7,6 @@
*
* Contains the routines for constructing the SMB PDUs themselves
*
- * This library is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published
- * by the Free Software Foundation; either version 2.1 of the License, or
- * (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
- * the GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/* SMB/CIFS PDU handling routines here - except for leftovers in connect.c */
@@ -1220,7 +1208,7 @@ SMBLegacyOpen(const unsigned int xid, struct cifs_tcon *tcon,
int *pOplock, FILE_ALL_INFO *pfile_info,
const struct nls_table *nls_codepage, int remap)
{
- int rc = -EACCES;
+ int rc;
OPENX_REQ *pSMB = NULL;
OPENX_RSP *pSMBr = NULL;
int bytes_returned;
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 495c395f9def..5d269f583dac 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -1,22 +1,10 @@
+// SPDX-License-Identifier: LGPL-2.1
/*
* fs/cifs/connect.c
*
* Copyright (C) International Business Machines Corp., 2002,2011
* Author(s): Steve French (sfrench@us.ibm.com)
*
- * This library is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published
- * by the Free Software Foundation; either version 2.1 of the License, or
- * (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
- * the GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/fs.h>
#include <linux/net.h>
@@ -368,13 +356,7 @@ cifs_reconnect(struct TCP_Server_Info *server)
cifs_server_dbg(VFS, "%s: failed to update DFS target hint: rc = %d\n",
__func__, rc);
}
- rc = dfs_cache_update_vol(cifs_sb->origin_fullpath, server);
- if (rc) {
- cifs_server_dbg(VFS, "%s: failed to update vol info in DFS cache: rc = %d\n",
- __func__, rc);
- }
dfs_cache_free_tgts(&tgt_list);
-
}
cifs_put_tcp_super(sb);
@@ -1557,29 +1539,25 @@ out:
/**
* cifs_free_ipc - helper to release the session IPC tcon
*
- * Needs to be called everytime a session is destroyed
+ * Needs to be called everytime a session is destroyed.
+ *
+ * On session close, the IPC is closed and the server must release all tcons of the session.
+ * No need to send a tree disconnect here.
+ *
+ * Besides, it will make the server to not close durable and resilient files on session close, as
+ * specified in MS-SMB2 3.3.5.6 Receiving an SMB2 LOGOFF Request.
*/
static int
cifs_free_ipc(struct cifs_ses *ses)
{
- int rc = 0, xid;
struct cifs_tcon *tcon = ses->tcon_ipc;
if (tcon == NULL)
return 0;
- if (ses->server->ops->tree_disconnect) {
- xid = get_xid();
- rc = ses->server->ops->tree_disconnect(xid, tcon);
- free_xid(xid);
- }
-
- if (rc)
- cifs_dbg(FYI, "failed to disconnect IPC tcon (rc=%d)\n", rc);
-
tconInfoFree(tcon);
ses->tcon_ipc = NULL;
- return rc;
+ return 0;
}
static struct cifs_ses *
@@ -1605,7 +1583,6 @@ void cifs_put_smb_ses(struct cifs_ses *ses)
{
unsigned int rc, xid;
struct TCP_Server_Info *server = ses->server;
-
cifs_dbg(FYI, "%s: ses_count=%d\n", __func__, ses->ses_count);
spin_lock(&cifs_tcp_ses_lock);
@@ -1613,13 +1590,20 @@ void cifs_put_smb_ses(struct cifs_ses *ses)
spin_unlock(&cifs_tcp_ses_lock);
return;
}
+
+ cifs_dbg(FYI, "%s: ses_count=%d\n", __func__, ses->ses_count);
+ cifs_dbg(FYI, "%s: ses ipc: %s\n", __func__, ses->tcon_ipc ? ses->tcon_ipc->treeName : "NONE");
+
if (--ses->ses_count > 0) {
spin_unlock(&cifs_tcp_ses_lock);
return;
}
+ spin_unlock(&cifs_tcp_ses_lock);
+
+ spin_lock(&GlobalMid_Lock);
if (ses->status == CifsGood)
ses->status = CifsExiting;
- spin_unlock(&cifs_tcp_ses_lock);
+ spin_unlock(&GlobalMid_Lock);
cifs_free_ipc(ses);
@@ -1951,10 +1935,7 @@ cifs_find_tcon(struct cifs_ses *ses, struct smb3_fs_context *ctx)
spin_lock(&cifs_tcp_ses_lock);
list_for_each(tmp, &ses->tcon_list) {
tcon = list_entry(tmp, struct cifs_tcon, tcon_list);
-#ifdef CONFIG_CIFS_DFS_UPCALL
- if (tcon->dfs_path)
- continue;
-#endif
+
if (!match_tcon(tcon, ctx))
continue;
++tcon->tc_count;
@@ -3017,9 +2998,8 @@ expand_dfs_referral(const unsigned int xid, struct cifs_ses *ses,
return rc;
}
-static inline int get_next_dfs_tgt(const char *path,
- struct dfs_cache_tgt_list *tgt_list,
- struct dfs_cache_tgt_iterator **tgt_it)
+static int get_next_dfs_tgt(struct dfs_cache_tgt_list *tgt_list,
+ struct dfs_cache_tgt_iterator **tgt_it)
{
if (!*tgt_it)
*tgt_it = dfs_cache_get_tgt_iterator(tgt_list);
@@ -3059,6 +3039,7 @@ static int do_dfs_failover(const char *path, const char *full_path, struct cifs_
struct cifs_ses **ses, struct cifs_tcon **tcon)
{
int rc;
+ char *npath = NULL;
struct dfs_cache_tgt_list tgt_list = {0};
struct dfs_cache_tgt_iterator *tgt_it = NULL;
struct smb3_fs_context tmp_ctx = {NULL};
@@ -3066,11 +3047,15 @@ static int do_dfs_failover(const char *path, const char *full_path, struct cifs_
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_DFS)
return -EOPNOTSUPP;
- cifs_dbg(FYI, "%s: path=%s full_path=%s\n", __func__, path, full_path);
+ npath = dfs_cache_canonical_path(path, cifs_sb->local_nls, cifs_remap(cifs_sb));
+ if (IS_ERR(npath))
+ return PTR_ERR(npath);
+
+ cifs_dbg(FYI, "%s: path=%s full_path=%s\n", __func__, npath, full_path);
- rc = dfs_cache_noreq_find(path, NULL, &tgt_list);
+ rc = dfs_cache_noreq_find(npath, NULL, &tgt_list);
if (rc)
- return rc;
+ goto out;
/*
* We use a 'tmp_ctx' here because we need pass it down to the mount_{get,put} functions to
* test connection against new DFS targets.
@@ -3084,11 +3069,11 @@ static int do_dfs_failover(const char *path, const char *full_path, struct cifs_
char *fake_devname = NULL, *mdata = NULL;
/* Get next DFS target server - if any */
- rc = get_next_dfs_tgt(path, &tgt_list, &tgt_it);
+ rc = get_next_dfs_tgt(&tgt_list, &tgt_it);
if (rc)
break;
- rc = dfs_cache_get_tgt_referral(path, tgt_it, &ref);
+ rc = dfs_cache_get_tgt_referral(npath, tgt_it, &ref);
if (rc)
break;
@@ -3137,6 +3122,7 @@ static int do_dfs_failover(const char *path, const char *full_path, struct cifs_
}
out:
+ kfree(npath);
smb3_cleanup_fs_context_contents(&tmp_ctx);
dfs_cache_free_tgts(&tgt_list);
return rc;
@@ -3288,25 +3274,18 @@ static int is_path_remote(struct cifs_sb_info *cifs_sb, struct smb3_fs_context *
}
#ifdef CONFIG_CIFS_DFS_UPCALL
-static void set_root_ses(struct cifs_sb_info *cifs_sb, struct cifs_ses *ses,
+static void set_root_ses(struct cifs_sb_info *cifs_sb, const uuid_t *mount_id, struct cifs_ses *ses,
struct cifs_ses **root_ses)
{
if (ses) {
spin_lock(&cifs_tcp_ses_lock);
ses->ses_count++;
- if (ses->tcon_ipc)
- ses->tcon_ipc->remap = cifs_remap(cifs_sb);
spin_unlock(&cifs_tcp_ses_lock);
+ dfs_cache_add_refsrv_session(mount_id, ses);
}
*root_ses = ses;
}
-static void put_root_ses(struct cifs_ses *ses)
-{
- if (ses)
- cifs_put_smb_ses(ses);
-}
-
/* Set up next dfs prefix path in @dfs_path */
static int next_dfs_prepath(struct cifs_sb_info *cifs_sb, struct smb3_fs_context *ctx,
const unsigned int xid, struct TCP_Server_Info *server,
@@ -3352,17 +3331,25 @@ out:
}
/* Check if resolved targets can handle any DFS referrals */
-static int is_referral_server(const char *ref_path, struct cifs_tcon *tcon, bool *ref_server)
+static int is_referral_server(const char *ref_path, struct cifs_sb_info *cifs_sb,
+ struct cifs_tcon *tcon, bool *ref_server)
{
int rc;
struct dfs_info3_param ref = {0};
+ cifs_dbg(FYI, "%s: ref_path=%s\n", __func__, ref_path);
+
if (is_tcon_dfs(tcon)) {
*ref_server = true;
} else {
- cifs_dbg(FYI, "%s: ref_path=%s\n", __func__, ref_path);
+ char *npath;
- rc = dfs_cache_noreq_find(ref_path, &ref, NULL);
+ npath = dfs_cache_canonical_path(ref_path, cifs_sb->local_nls, cifs_remap(cifs_sb));
+ if (IS_ERR(npath))
+ return PTR_ERR(npath);
+
+ rc = dfs_cache_noreq_find(npath, &ref, NULL);
+ kfree(npath);
if (rc) {
cifs_dbg(VFS, "%s: dfs_cache_noreq_find: failed (rc=%d)\n", __func__, rc);
return rc;
@@ -3386,9 +3373,9 @@ int cifs_mount(struct cifs_sb_info *cifs_sb, struct smb3_fs_context *ctx)
struct cifs_ses *ses = NULL, *root_ses = NULL;
struct cifs_tcon *tcon = NULL;
int count = 0;
+ uuid_t mount_id = {0};
char *ref_path = NULL, *full_path = NULL;
char *oldmnt = NULL;
- char *mntdata = NULL;
bool ref_server = false;
rc = mount_get_conns(ctx, cifs_sb, &xid, &server, &ses, &tcon);
@@ -3411,12 +3398,9 @@ int cifs_mount(struct cifs_sb_info *cifs_sb, struct smb3_fs_context *ctx)
if (rc != -EREMOTE)
goto error;
}
- /* Save mount options */
- mntdata = kstrdup(cifs_sb->ctx->mount_options, GFP_KERNEL);
- if (!mntdata) {
- rc = -ENOMEM;
- goto error;
- }
+
+ ctx->nosharesock = true;
+
/* Get path of DFS root */
ref_path = build_unc_path_to_root(ctx, cifs_sb, false);
if (IS_ERR(ref_path)) {
@@ -3425,7 +3409,8 @@ int cifs_mount(struct cifs_sb_info *cifs_sb, struct smb3_fs_context *ctx)
goto error;
}
- set_root_ses(cifs_sb, ses, &root_ses);
+ uuid_gen(&mount_id);
+ set_root_ses(cifs_sb, &mount_id, ses, &root_ses);
do {
/* Save full path of last DFS path we used to resolve final target server */
kfree(full_path);
@@ -3456,13 +3441,11 @@ int cifs_mount(struct cifs_sb_info *cifs_sb, struct smb3_fs_context *ctx)
continue;
/* Make sure that requests go through new root servers */
- rc = is_referral_server(ref_path + 1, tcon, &ref_server);
+ rc = is_referral_server(ref_path + 1, cifs_sb, tcon, &ref_server);
if (rc)
break;
- if (ref_server) {
- put_root_ses(root_ses);
- set_root_ses(cifs_sb, ses, &root_ses);
- }
+ if (ref_server)
+ set_root_ses(cifs_sb, &mount_id, ses, &root_ses);
/* Get next dfs path and then continue chasing them if -EREMOTE */
rc = next_dfs_prepath(cifs_sb, ctx, xid, server, tcon, &ref_path);
@@ -3471,12 +3454,10 @@ int cifs_mount(struct cifs_sb_info *cifs_sb, struct smb3_fs_context *ctx)
rc = -ELOOP;
} while (rc == -EREMOTE);
- if (rc)
+ if (rc || !tcon)
goto error;
- put_root_ses(root_ses);
- root_ses = NULL;
+
kfree(ref_path);
- ref_path = NULL;
/*
* Store DFS full path in both superblock and tree connect structures.
*
@@ -3485,21 +3466,27 @@ int cifs_mount(struct cifs_sb_info *cifs_sb, struct smb3_fs_context *ctx)
* links, the prefix path is included in both and may be changed during reconnect. See
* cifs_tree_connect().
*/
- cifs_sb->origin_fullpath = kstrdup(full_path, GFP_KERNEL);
- if (!cifs_sb->origin_fullpath) {
+ ref_path = dfs_cache_canonical_path(full_path, cifs_sb->local_nls, cifs_remap(cifs_sb));
+ kfree(full_path);
+ full_path = NULL;
+
+ if (IS_ERR(ref_path)) {
+ rc = PTR_ERR(ref_path);
+ ref_path = NULL;
+ goto error;
+ }
+ cifs_sb->origin_fullpath = ref_path;
+
+ ref_path = kstrdup(cifs_sb->origin_fullpath, GFP_KERNEL);
+ if (!ref_path) {
rc = -ENOMEM;
goto error;
}
spin_lock(&cifs_tcp_ses_lock);
- tcon->dfs_path = full_path;
- full_path = NULL;
- tcon->remap = cifs_remap(cifs_sb);
+ tcon->dfs_path = ref_path;
+ ref_path = NULL;
spin_unlock(&cifs_tcp_ses_lock);
- /* Add original context for DFS cache to be used when refreshing referrals */
- rc = dfs_cache_add_vol(mntdata, ctx, cifs_sb->origin_fullpath);
- if (rc)
- goto error;
/*
* After reconnecting to a different server, unique ids won't
* match anymore, so we disable serverino. This prevents
@@ -3514,6 +3501,7 @@ int cifs_mount(struct cifs_sb_info *cifs_sb, struct smb3_fs_context *ctx)
kfree(cifs_sb->prepath);
cifs_sb->prepath = ctx->prepath;
ctx->prepath = NULL;
+ uuid_copy(&cifs_sb->dfs_mount_id, &mount_id);
out:
free_xid(xid);
@@ -3523,9 +3511,8 @@ out:
error:
kfree(ref_path);
kfree(full_path);
- kfree(mntdata);
kfree(cifs_sb->origin_fullpath);
- put_root_ses(root_ses);
+ dfs_cache_put_refsrv_sessions(&mount_id);
mount_put_conns(cifs_sb, xid, server, ses, tcon);
return rc;
}
@@ -3755,7 +3742,7 @@ cifs_umount(struct cifs_sb_info *cifs_sb)
kfree(cifs_sb->prepath);
#ifdef CONFIG_CIFS_DFS_UPCALL
- dfs_cache_del_vol(cifs_sb->origin_fullpath);
+ dfs_cache_put_refsrv_sessions(&cifs_sb->dfs_mount_id);
kfree(cifs_sb->origin_fullpath);
#endif
call_rcu(&cifs_sb->rcu, delayed_free);
diff --git a/fs/cifs/dfs_cache.c b/fs/cifs/dfs_cache.c
index b1fa30fefe1f..7c1769714609 100644
--- a/fs/cifs/dfs_cache.c
+++ b/fs/cifs/dfs_cache.c
@@ -11,6 +11,7 @@
#include <linux/proc_fs.h>
#include <linux/nls.h>
#include <linux/workqueue.h>
+#include <linux/uuid.h>
#include "cifsglob.h"
#include "smb2pdu.h"
#include "smb2proto.h"
@@ -18,15 +19,14 @@
#include "cifs_debug.h"
#include "cifs_unicode.h"
#include "smb2glob.h"
-#include "fs_context.h"
#include "dfs_cache.h"
#define CACHE_HTABLE_SIZE 32
#define CACHE_MAX_ENTRIES 64
+#define CACHE_MIN_TTL 120 /* 2 minutes */
-#define IS_INTERLINK_SET(v) ((v) & (DFSREF_REFERRAL_SERVER | \
- DFSREF_STORAGE_SERVER))
+#define IS_DFS_INTERLINK(v) (((v) & DFSREF_REFERRAL_SERVER) && !((v) & DFSREF_STORAGE_SERVER))
struct cache_dfs_tgt {
char *name;
@@ -48,14 +48,15 @@ struct cache_entry {
struct cache_dfs_tgt *tgthint;
};
-struct vol_info {
- char *fullpath;
- spinlock_t ctx_lock;
- struct smb3_fs_context ctx;
- char *mntdata;
+/* List of referral server sessions per dfs mount */
+struct mount_group {
struct list_head list;
- struct list_head rlist;
- struct kref refcnt;
+ uuid_t id;
+ struct cifs_ses *sessions[CACHE_MAX_ENTRIES];
+ int num_sessions;
+ spinlock_t lock;
+ struct list_head refresh_list;
+ struct kref refcount;
};
static struct kmem_cache *cache_slab __read_mostly;
@@ -64,7 +65,7 @@ static struct workqueue_struct *dfscache_wq __read_mostly;
static int cache_ttl;
static DEFINE_SPINLOCK(cache_ttl_lock);
-static struct nls_table *cache_nlsc;
+static struct nls_table *cache_cp;
/*
* Number of entries in the cache
@@ -74,34 +75,145 @@ static atomic_t cache_count;
static struct hlist_head cache_htable[CACHE_HTABLE_SIZE];
static DECLARE_RWSEM(htable_rw_lock);
-static LIST_HEAD(vol_list);
-static DEFINE_SPINLOCK(vol_list_lock);
+static LIST_HEAD(mount_group_list);
+static DEFINE_MUTEX(mount_group_list_lock);
static void refresh_cache_worker(struct work_struct *work);
static DECLARE_DELAYED_WORK(refresh_task, refresh_cache_worker);
-static int get_normalized_path(const char *path, const char **npath)
+static void get_ipc_unc(const char *ref_path, char *ipc, size_t ipclen)
{
- if (!path || strlen(path) < 3 || (*path != '\\' && *path != '/'))
- return -EINVAL;
+ const char *host;
+ size_t len;
- if (*path == '\\') {
- *npath = path;
- } else {
- char *s = kstrdup(path, GFP_KERNEL);
- if (!s)
- return -ENOMEM;
- convert_delimiter(s, '\\');
- *npath = s;
+ extract_unc_hostname(ref_path, &host, &len);
+ scnprintf(ipc, ipclen, "\\\\%.*s\\IPC$", (int)len, host);
+}
+
+static struct cifs_ses *find_ipc_from_server_path(struct cifs_ses **ses, const char *path)
+{
+ char unc[SERVER_NAME_LENGTH + sizeof("//x/IPC$")] = {0};
+
+ get_ipc_unc(path, unc, sizeof(unc));
+ for (; *ses; ses++) {
+ if (!strcasecmp(unc, (*ses)->tcon_ipc->treeName))
+ return *ses;
}
- return 0;
+ return ERR_PTR(-ENOENT);
+}
+
+static void __mount_group_release(struct mount_group *mg)
+{
+ int i;
+
+ for (i = 0; i < mg->num_sessions; i++)
+ cifs_put_smb_ses(mg->sessions[i]);
+ kfree(mg);
+}
+
+static void mount_group_release(struct kref *kref)
+{
+ struct mount_group *mg = container_of(kref, struct mount_group, refcount);
+
+ mutex_lock(&mount_group_list_lock);
+ list_del(&mg->list);
+ mutex_unlock(&mount_group_list_lock);
+ __mount_group_release(mg);
+}
+
+static struct mount_group *find_mount_group_locked(const uuid_t *id)
+{
+ struct mount_group *mg;
+
+ list_for_each_entry(mg, &mount_group_list, list) {
+ if (uuid_equal(&mg->id, id))
+ return mg;
+ }
+ return ERR_PTR(-ENOENT);
+}
+
+static struct mount_group *__get_mount_group_locked(const uuid_t *id)
+{
+ struct mount_group *mg;
+
+ mg = find_mount_group_locked(id);
+ if (!IS_ERR(mg))
+ return mg;
+
+ mg = kmalloc(sizeof(*mg), GFP_KERNEL);
+ if (!mg)
+ return ERR_PTR(-ENOMEM);
+ kref_init(&mg->refcount);
+ uuid_copy(&mg->id, id);
+ mg->num_sessions = 0;
+ spin_lock_init(&mg->lock);
+ list_add(&mg->list, &mount_group_list);
+ return mg;
+}
+
+static struct mount_group *get_mount_group(const uuid_t *id)
+{
+ struct mount_group *mg;
+
+ mutex_lock(&mount_group_list_lock);
+ mg = __get_mount_group_locked(id);
+ if (!IS_ERR(mg))
+ kref_get(&mg->refcount);
+ mutex_unlock(&mount_group_list_lock);
+
+ return mg;
}
-static inline void free_normalized_path(const char *path, const char *npath)
+static void free_mount_group_list(void)
{
- if (path != npath)
- kfree(npath);
+ struct mount_group *mg, *tmp_mg;
+
+ list_for_each_entry_safe(mg, tmp_mg, &mount_group_list, list) {
+ list_del_init(&mg->list);
+ __mount_group_release(mg);
+ }
+}
+
+/**
+ * dfs_cache_canonical_path - get a canonical DFS path
+ *
+ * @path: DFS path
+ * @cp: codepage
+ * @remap: mapping type
+ *
+ * Return canonical path if success, otherwise error.
+ */
+char *dfs_cache_canonical_path(const char *path, const struct nls_table *cp, int remap)
+{
+ char *tmp;
+ int plen = 0;
+ char *npath;
+
+ if (!path || strlen(path) < 3 || (*path != '\\' && *path != '/'))
+ return ERR_PTR(-EINVAL);
+
+ if (unlikely(strcmp(cp->charset, cache_cp->charset))) {
+ tmp = (char *)cifs_strndup_to_utf16(path, strlen(path), &plen, cp, remap);
+ if (!tmp) {
+ cifs_dbg(VFS, "%s: failed to convert path to utf16\n", __func__);
+ return ERR_PTR(-EINVAL);
+ }
+
+ npath = cifs_strndup_from_utf16(tmp, plen, true, cache_cp);
+ kfree(tmp);
+
+ if (!npath) {
+ cifs_dbg(VFS, "%s: failed to convert path from utf16\n", __func__);
+ return ERR_PTR(-EINVAL);
+ }
+ } else {
+ npath = kstrdup(path, GFP_KERNEL);
+ if (!npath)
+ return ERR_PTR(-ENOMEM);
+ }
+ convert_delimiter(npath, '\\');
+ return npath;
}
static inline bool cache_entry_expired(const struct cache_entry *ce)
@@ -171,7 +283,7 @@ static int dfscache_proc_show(struct seq_file *m, void *v)
"cache entry: path=%s,type=%s,ttl=%d,etime=%ld,hdr_flags=0x%x,ref_flags=0x%x,interlink=%s,path_consumed=%d,expired=%s\n",
ce->path, ce->srvtype == DFS_TYPE_ROOT ? "root" : "link",
ce->ttl, ce->etime.tv_nsec, ce->ref_flags, ce->hdr_flags,
- IS_INTERLINK_SET(ce->hdr_flags) ? "yes" : "no",
+ IS_DFS_INTERLINK(ce->hdr_flags) ? "yes" : "no",
ce->path_consumed, cache_entry_expired(ce) ? "yes" : "no");
list_for_each_entry(t, &ce->tlist, list) {
@@ -240,7 +352,7 @@ static inline void dump_ce(const struct cache_entry *ce)
ce->srvtype == DFS_TYPE_ROOT ? "root" : "link", ce->ttl,
ce->etime.tv_nsec,
ce->hdr_flags, ce->ref_flags,
- IS_INTERLINK_SET(ce->hdr_flags) ? "yes" : "no",
+ IS_DFS_INTERLINK(ce->hdr_flags) ? "yes" : "no",
ce->path_consumed,
cache_entry_expired(ce) ? "yes" : "no");
dump_tgts(ce);
@@ -284,8 +396,7 @@ int dfs_cache_init(void)
int rc;
int i;
- dfscache_wq = alloc_workqueue("cifs-dfscache",
- WQ_FREEZABLE | WQ_MEM_RECLAIM, 1);
+ dfscache_wq = alloc_workqueue("cifs-dfscache", WQ_FREEZABLE | WQ_UNBOUND, 1);
if (!dfscache_wq)
return -ENOMEM;
@@ -301,7 +412,9 @@ int dfs_cache_init(void)
INIT_HLIST_HEAD(&cache_htable[i]);
atomic_set(&cache_count, 0);
- cache_nlsc = load_nls_default();
+ cache_cp = load_nls("utf8");
+ if (!cache_cp)
+ cache_cp = load_nls_default();
cifs_dbg(FYI, "%s: initialized DFS referral cache\n", __func__);
return 0;
@@ -311,23 +424,24 @@ out_destroy_wq:
return rc;
}
-static inline unsigned int cache_entry_hash(const void *data, int size)
+static int cache_entry_hash(const void *data, int size, unsigned int *hash)
{
- unsigned int h;
-
- h = jhash(data, size, 0);
- return h & (CACHE_HTABLE_SIZE - 1);
-}
-
-/* Check whether second path component of @path is SYSVOL or NETLOGON */
-static inline bool is_sysvol_or_netlogon(const char *path)
-{
- const char *s;
- char sep = path[0];
-
- s = strchr(path + 1, sep) + 1;
- return !strncasecmp(s, "sysvol", strlen("sysvol")) ||
- !strncasecmp(s, "netlogon", strlen("netlogon"));
+ int i, clen;
+ const unsigned char *s = data;
+ wchar_t c;
+ unsigned int h = 0;
+
+ for (i = 0; i < size; i += clen) {
+ clen = cache_cp->char2uni(&s[i], size - i, &c);
+ if (unlikely(clen < 0)) {
+ cifs_dbg(VFS, "%s: can't convert char\n", __func__);
+ return clen;
+ }
+ c = cifs_toupper(c);
+ h = jhash(&c, sizeof(c), h);
+ }
+ *hash = h % CACHE_HTABLE_SIZE;
+ return 0;
}
/* Return target hint of a DFS cache entry */
@@ -378,7 +492,7 @@ static int copy_ref_data(const struct dfs_info3_param *refs, int numrefs,
{
int i;
- ce->ttl = refs[0].ttl;
+ ce->ttl = max_t(int, refs[0].ttl, CACHE_MIN_TTL);
ce->etime = get_expire_time(ce->ttl);
ce->srvtype = refs[0].server_type;
ce->hdr_flags = refs[0].flags;
@@ -409,9 +523,7 @@ static int copy_ref_data(const struct dfs_info3_param *refs, int numrefs,
}
/* Allocate a new cache entry */
-static struct cache_entry *alloc_cache_entry(const char *path,
- const struct dfs_info3_param *refs,
- int numrefs)
+static struct cache_entry *alloc_cache_entry(struct dfs_info3_param *refs, int numrefs)
{
struct cache_entry *ce;
int rc;
@@ -420,11 +532,9 @@ static struct cache_entry *alloc_cache_entry(const char *path,
if (!ce)
return ERR_PTR(-ENOMEM);
- ce->path = kstrdup(path, GFP_KERNEL);
- if (!ce->path) {
- kmem_cache_free(cache_slab, ce);
- return ERR_PTR(-ENOMEM);
- }
+ ce->path = refs[0].path_name;
+ refs[0].path_name = NULL;
+
INIT_HLIST_NODE(&ce->hlist);
INIT_LIST_HEAD(&ce->tlist);
@@ -437,13 +547,14 @@ static struct cache_entry *alloc_cache_entry(const char *path,
return ce;
}
-/* Must be called with htable_rw_lock held */
-static void remove_oldest_entry(void)
+static void remove_oldest_entry_locked(void)
{
int i;
struct cache_entry *ce;
struct cache_entry *to_del = NULL;
+ WARN_ON(!rwsem_is_locked(&htable_rw_lock));
+
for (i = 0; i < CACHE_HTABLE_SIZE; i++) {
struct hlist_head *l = &cache_htable[i];
@@ -467,12 +578,24 @@ static void remove_oldest_entry(void)
}
/* Add a new DFS cache entry */
-static int add_cache_entry(const char *path, unsigned int hash,
- struct dfs_info3_param *refs, int numrefs)
+static int add_cache_entry_locked(struct dfs_info3_param *refs, int numrefs)
{
+ int rc;
struct cache_entry *ce;
+ unsigned int hash;
+
+ WARN_ON(!rwsem_is_locked(&htable_rw_lock));
+
+ if (atomic_read(&cache_count) >= CACHE_MAX_ENTRIES) {
+ cifs_dbg(FYI, "%s: reached max cache size (%d)\n", __func__, CACHE_MAX_ENTRIES);
+ remove_oldest_entry_locked();
+ }
- ce = alloc_cache_entry(path, refs, numrefs);
+ rc = cache_entry_hash(refs[0].path_name, strlen(refs[0].path_name), &hash);
+ if (rc)
+ return rc;
+
+ ce = alloc_cache_entry(refs, numrefs);
if (IS_ERR(ce))
return PTR_ERR(ce);
@@ -486,65 +609,77 @@ static int add_cache_entry(const char *path, unsigned int hash,
}
spin_unlock(&cache_ttl_lock);
- down_write(&htable_rw_lock);
hlist_add_head(&ce->hlist, &cache_htable[hash]);
dump_ce(ce);
- up_write(&htable_rw_lock);
+
+ atomic_inc(&cache_count);
return 0;
}
-static struct cache_entry *__lookup_cache_entry(const char *path)
+/* Check if two DFS paths are equal. @s1 and @s2 are expected to be in @cache_cp's charset */
+static bool dfs_path_equal(const char *s1, int len1, const char *s2, int len2)
{
- struct cache_entry *ce;
- unsigned int h;
- bool found = false;
+ int i, l1, l2;
+ wchar_t c1, c2;
- h = cache_entry_hash(path, strlen(path));
+ if (len1 != len2)
+ return false;
- hlist_for_each_entry(ce, &cache_htable[h], hlist) {
- if (!strcasecmp(path, ce->path)) {
- found = true;
- dump_ce(ce);
- break;
+ for (i = 0; i < len1; i += l1) {
+ l1 = cache_cp->char2uni(&s1[i], len1 - i, &c1);
+ l2 = cache_cp->char2uni(&s2[i], len2 - i, &c2);
+ if (unlikely(l1 < 0 && l2 < 0)) {
+ if (s1[i] != s2[i])
+ return false;
+ l1 = 1;
+ continue;
}
+ if (l1 != l2)
+ return false;
+ if (cifs_toupper(c1) != cifs_toupper(c2))
+ return false;
}
+ return true;
+}
- if (!found)
- ce = ERR_PTR(-ENOENT);
- return ce;
+static struct cache_entry *__lookup_cache_entry(const char *path, unsigned int hash, int len)
+{
+ struct cache_entry *ce;
+
+ hlist_for_each_entry(ce, &cache_htable[hash], hlist) {
+ if (dfs_path_equal(ce->path, strlen(ce->path), path, len)) {
+ dump_ce(ce);
+ return ce;
+ }
+ }
+ return ERR_PTR(-EEXIST);
}
/*
- * Find a DFS cache entry in hash table and optionally check prefix path against
- * @path.
- * Use whole path components in the match.
- * Must be called with htable_rw_lock held.
+ * Find a DFS cache entry in hash table and optionally check prefix path against normalized @path.
+ *
+ * Use whole path components in the match. Must be called with htable_rw_lock held.
*
- * Return ERR_PTR(-ENOENT) if the entry is not found.
+ * Return ERR_PTR(-EEXIST) if the entry is not found.
*/
-static struct cache_entry *lookup_cache_entry(const char *path, unsigned int *hash)
+static struct cache_entry *lookup_cache_entry(const char *path)
{
- struct cache_entry *ce = ERR_PTR(-ENOENT);
- unsigned int h;
+ struct cache_entry *ce;
int cnt = 0;
- char *npath;
- char *s, *e;
- char sep;
-
- npath = kstrdup(path, GFP_KERNEL);
- if (!npath)
- return ERR_PTR(-ENOMEM);
+ const char *s = path, *e;
+ char sep = *s;
+ unsigned int hash;
+ int rc;
- s = npath;
- sep = *npath;
while ((s = strchr(s, sep)) && ++cnt < 3)
s++;
if (cnt < 3) {
- h = cache_entry_hash(path, strlen(path));
- ce = __lookup_cache_entry(path);
- goto out;
+ rc = cache_entry_hash(path, strlen(path), &hash);
+ if (rc)
+ return ERR_PTR(rc);
+ return __lookup_cache_entry(path, hash, strlen(path));
}
/*
* Handle paths that have more than two path components and are a complete prefix of the DFS
@@ -552,64 +687,29 @@ static struct cache_entry *lookup_cache_entry(const char *path, unsigned int *ha
*
* See MS-DFSC 3.2.5.5 "Receiving a Root Referral Request or Link Referral Request".
*/
- h = cache_entry_hash(npath, strlen(npath));
- e = npath + strlen(npath) - 1;
+ e = path + strlen(path) - 1;
while (e > s) {
- char tmp;
+ int len;
/* skip separators */
while (e > s && *e == sep)
e--;
if (e == s)
- goto out;
-
- tmp = *(e+1);
- *(e+1) = 0;
-
- ce = __lookup_cache_entry(npath);
- if (!IS_ERR(ce)) {
- h = cache_entry_hash(npath, strlen(npath));
break;
- }
- *(e+1) = tmp;
+ len = e + 1 - path;
+ rc = cache_entry_hash(path, len, &hash);
+ if (rc)
+ return ERR_PTR(rc);
+ ce = __lookup_cache_entry(path, hash, len);
+ if (!IS_ERR(ce))
+ return ce;
+
/* backward until separator */
while (e > s && *e != sep)
e--;
}
-out:
- if (hash)
- *hash = h;
- kfree(npath);
- return ce;
-}
-
-static void __vol_release(struct vol_info *vi)
-{
- kfree(vi->fullpath);
- kfree(vi->mntdata);
- smb3_cleanup_fs_context_contents(&vi->ctx);
- kfree(vi);
-}
-
-static void vol_release(struct kref *kref)
-{
- struct vol_info *vi = container_of(kref, struct vol_info, refcnt);
-
- spin_lock(&vol_list_lock);
- list_del(&vi->list);
- spin_unlock(&vol_list_lock);
- __vol_release(vi);
-}
-
-static inline void free_vol_list(void)
-{
- struct vol_info *vi, *nvi;
-
- list_for_each_entry_safe(vi, nvi, &vol_list, list) {
- list_del_init(&vi->list);
- __vol_release(vi);
- }
+ return ERR_PTR(-EEXIST);
}
/**
@@ -618,8 +718,8 @@ static inline void free_vol_list(void)
void dfs_cache_destroy(void)
{
cancel_delayed_work_sync(&refresh_task);
- unload_nls(cache_nlsc);
- free_vol_list();
+ unload_nls(cache_cp);
+ free_mount_group_list();
flush_cache_ents();
kmem_cache_destroy(cache_slab);
destroy_workqueue(dfscache_wq);
@@ -627,18 +727,14 @@ void dfs_cache_destroy(void)
cifs_dbg(FYI, "%s: destroyed DFS referral cache\n", __func__);
}
-/* Must be called with htable_rw_lock held */
-static int __update_cache_entry(const char *path,
- const struct dfs_info3_param *refs,
- int numrefs)
+/* Update a cache entry with the new referral in @refs */
+static int update_cache_entry_locked(struct cache_entry *ce, const struct dfs_info3_param *refs,
+ int numrefs)
{
int rc;
- struct cache_entry *ce;
char *s, *th = NULL;
- ce = lookup_cache_entry(path, NULL);
- if (IS_ERR(ce))
- return PTR_ERR(ce);
+ WARN_ON(!rwsem_is_locked(&htable_rw_lock));
if (ce->tgthint) {
s = ce->tgthint->name;
@@ -657,37 +753,30 @@ static int __update_cache_entry(const char *path,
return rc;
}
-static int get_dfs_referral(const unsigned int xid, struct cifs_ses *ses,
- const struct nls_table *nls_codepage, int remap,
- const char *path, struct dfs_info3_param **refs,
- int *numrefs)
+static int get_dfs_referral(const unsigned int xid, struct cifs_ses *ses, const char *path,
+ struct dfs_info3_param **refs, int *numrefs)
{
- cifs_dbg(FYI, "%s: get an DFS referral for %s\n", __func__, path);
+ int rc;
+ int i;
- if (!ses || !ses->server || !ses->server->ops->get_dfs_refer)
- return -EOPNOTSUPP;
- if (unlikely(!nls_codepage))
- return -EINVAL;
+ cifs_dbg(FYI, "%s: get an DFS referral for %s\n", __func__, path);
*refs = NULL;
*numrefs = 0;
- return ses->server->ops->get_dfs_refer(xid, ses, path, refs, numrefs,
- nls_codepage, remap);
-}
-
-/* Update an expired cache entry by getting a new DFS referral from server */
-static int update_cache_entry(const char *path,
- const struct dfs_info3_param *refs,
- int numrefs)
-{
-
- int rc;
+ if (!ses || !ses->server || !ses->server->ops->get_dfs_refer)
+ return -EOPNOTSUPP;
+ if (unlikely(!cache_cp))
+ return -EINVAL;
- down_write(&htable_rw_lock);
- rc = __update_cache_entry(path, refs, numrefs);
- up_write(&htable_rw_lock);
+ rc = ses->server->ops->get_dfs_refer(xid, ses, path, refs, numrefs, cache_cp,
+ NO_MAP_UNI_RSVD);
+ if (!rc) {
+ struct dfs_info3_param *ref = *refs;
+ for (i = 0; i < *numrefs; i++)
+ convert_delimiter(ref[i].path_name, '\\');
+ }
return rc;
}
@@ -697,15 +786,12 @@ static int update_cache_entry(const char *path,
* If the entry wasn't found, it will create a new one. Or if it was found but
* expired, then it will update the entry accordingly.
*
- * For interlinks, __cifs_dfs_mount() and expand_dfs_referral() are supposed to
+ * For interlinks, cifs_mount() and expand_dfs_referral() are supposed to
* handle them properly.
*/
-static int __dfs_cache_find(const unsigned int xid, struct cifs_ses *ses,
- const struct nls_table *nls_codepage, int remap,
- const char *path, bool noreq)
+static int cache_refresh_path(const unsigned int xid, struct cifs_ses *ses, const char *path)
{
int rc;
- unsigned int hash;
struct cache_entry *ce;
struct dfs_info3_param *refs = NULL;
int numrefs = 0;
@@ -713,62 +799,38 @@ static int __dfs_cache_find(const unsigned int xid, struct cifs_ses *ses,
cifs_dbg(FYI, "%s: search path: %s\n", __func__, path);
- down_read(&htable_rw_lock);
-
- ce = lookup_cache_entry(path, &hash);
-
- /*
- * If @noreq is set, no requests will be sent to the server. Just return
- * the cache entry.
- */
- if (noreq) {
- up_read(&htable_rw_lock);
- return PTR_ERR_OR_ZERO(ce);
- }
+ down_write(&htable_rw_lock);
+ ce = lookup_cache_entry(path);
if (!IS_ERR(ce)) {
if (!cache_entry_expired(ce)) {
dump_ce(ce);
- up_read(&htable_rw_lock);
+ up_write(&htable_rw_lock);
return 0;
}
} else {
newent = true;
}
- up_read(&htable_rw_lock);
-
/*
- * No entry was found.
- *
- * Request a new DFS referral in order to create a new cache entry, or
- * updating an existing one.
+ * Either the entry was not found, or it is expired.
+ * Request a new DFS referral in order to create or update a cache entry.
*/
- rc = get_dfs_referral(xid, ses, nls_codepage, remap, path,
- &refs, &numrefs);
+ rc = get_dfs_referral(xid, ses, path, &refs, &numrefs);
if (rc)
- return rc;
+ goto out_unlock;
dump_refs(refs, numrefs);
if (!newent) {
- rc = update_cache_entry(path, refs, numrefs);
- goto out_free_refs;
- }
-
- if (atomic_read(&cache_count) >= CACHE_MAX_ENTRIES) {
- cifs_dbg(FYI, "%s: reached max cache size (%d)\n",
- __func__, CACHE_MAX_ENTRIES);
- down_write(&htable_rw_lock);
- remove_oldest_entry();
- up_write(&htable_rw_lock);
+ rc = update_cache_entry_locked(ce, refs, numrefs);
+ goto out_unlock;
}
- rc = add_cache_entry(path, hash, refs, numrefs);
- if (!rc)
- atomic_inc(&cache_count);
+ rc = add_cache_entry_locked(refs, numrefs);
-out_free_refs:
+out_unlock:
+ up_write(&htable_rw_lock);
free_dfs_info_array(refs, numrefs);
return rc;
}
@@ -868,7 +930,7 @@ err_free_it:
* needs to be issued:
* @xid: syscall xid
* @ses: smb session to issue the request on
- * @nls_codepage: charset conversion
+ * @cp: codepage
* @remap: path character remapping type
* @path: path to lookup in DFS referral cache.
*
@@ -877,26 +939,25 @@ err_free_it:
*
* Return zero if the target was found, otherwise non-zero.
*/
-int dfs_cache_find(const unsigned int xid, struct cifs_ses *ses,
- const struct nls_table *nls_codepage, int remap,
- const char *path, struct dfs_info3_param *ref,
+int dfs_cache_find(const unsigned int xid, struct cifs_ses *ses, const struct nls_table *cp,
+ int remap, const char *path, struct dfs_info3_param *ref,
struct dfs_cache_tgt_list *tgt_list)
{
int rc;
const char *npath;
struct cache_entry *ce;
- rc = get_normalized_path(path, &npath);
- if (rc)
- return rc;
+ npath = dfs_cache_canonical_path(path, cp, remap);
+ if (IS_ERR(npath))
+ return PTR_ERR(npath);
- rc = __dfs_cache_find(xid, ses, nls_codepage, remap, npath, false);
+ rc = cache_refresh_path(xid, ses, npath);
if (rc)
goto out_free_path;
down_read(&htable_rw_lock);
- ce = lookup_cache_entry(npath, NULL);
+ ce = lookup_cache_entry(npath);
if (IS_ERR(ce)) {
up_read(&htable_rw_lock);
rc = PTR_ERR(ce);
@@ -913,7 +974,7 @@ int dfs_cache_find(const unsigned int xid, struct cifs_ses *ses,
up_read(&htable_rw_lock);
out_free_path:
- free_normalized_path(path, npath);
+ kfree(npath);
return rc;
}
@@ -925,7 +986,7 @@ out_free_path:
* expired, nor create a new cache entry if @path hasn't been found. It heavily
* relies on an existing cache entry.
*
- * @path: path to lookup in the DFS referral cache.
+ * @path: canonical DFS path to lookup in the DFS referral cache.
* @ref: when non-NULL, store single DFS referral result in it.
* @tgt_list: when non-NULL, store complete DFS target list in it.
*
@@ -937,18 +998,13 @@ int dfs_cache_noreq_find(const char *path, struct dfs_info3_param *ref,
struct dfs_cache_tgt_list *tgt_list)
{
int rc;
- const char *npath;
struct cache_entry *ce;
- rc = get_normalized_path(path, &npath);
- if (rc)
- return rc;
-
- cifs_dbg(FYI, "%s: path: %s\n", __func__, npath);
+ cifs_dbg(FYI, "%s: path: %s\n", __func__, path);
down_read(&htable_rw_lock);
- ce = lookup_cache_entry(npath, NULL);
+ ce = lookup_cache_entry(path);
if (IS_ERR(ce)) {
rc = PTR_ERR(ce);
goto out_unlock;
@@ -963,8 +1019,6 @@ int dfs_cache_noreq_find(const char *path, struct dfs_info3_param *ref,
out_unlock:
up_read(&htable_rw_lock);
- free_normalized_path(path, npath);
-
return rc;
}
@@ -979,16 +1033,15 @@ out_unlock:
*
* @xid: syscall id
* @ses: smb session
- * @nls_codepage: charset conversion
+ * @cp: codepage
* @remap: type of character remapping for paths
- * @path: path to lookup in DFS referral cache.
+ * @path: path to lookup in DFS referral cache
* @it: DFS target iterator
*
* Return zero if the target hint was updated successfully, otherwise non-zero.
*/
int dfs_cache_update_tgthint(const unsigned int xid, struct cifs_ses *ses,
- const struct nls_table *nls_codepage, int remap,
- const char *path,
+ const struct nls_table *cp, int remap, const char *path,
const struct dfs_cache_tgt_iterator *it)
{
int rc;
@@ -996,19 +1049,19 @@ int dfs_cache_update_tgthint(const unsigned int xid, struct cifs_ses *ses,
struct cache_entry *ce;
struct cache_dfs_tgt *t;
- rc = get_normalized_path(path, &npath);
- if (rc)
- return rc;
+ npath = dfs_cache_canonical_path(path, cp, remap);
+ if (IS_ERR(npath))
+ return PTR_ERR(npath);
cifs_dbg(FYI, "%s: update target hint - path: %s\n", __func__, npath);
- rc = __dfs_cache_find(xid, ses, nls_codepage, remap, npath, false);
+ rc = cache_refresh_path(xid, ses, npath);
if (rc)
goto out_free_path;
down_write(&htable_rw_lock);
- ce = lookup_cache_entry(npath, NULL);
+ ce = lookup_cache_entry(npath);
if (IS_ERR(ce)) {
rc = PTR_ERR(ce);
goto out_unlock;
@@ -1031,8 +1084,7 @@ int dfs_cache_update_tgthint(const unsigned int xid, struct cifs_ses *ses,
out_unlock:
up_write(&htable_rw_lock);
out_free_path:
- free_normalized_path(path, npath);
-
+ kfree(npath);
return rc;
}
@@ -1044,32 +1096,26 @@ out_free_path:
* expired, nor create a new cache entry if @path hasn't been found. It heavily
* relies on an existing cache entry.
*
- * @path: path to lookup in DFS referral cache.
+ * @path: canonical DFS path to lookup in DFS referral cache.
* @it: target iterator which contains the target hint to update the cache
* entry with.
*
* Return zero if the target hint was updated successfully, otherwise non-zero.
*/
-int dfs_cache_noreq_update_tgthint(const char *path,
- const struct dfs_cache_tgt_iterator *it)
+int dfs_cache_noreq_update_tgthint(const char *path, const struct dfs_cache_tgt_iterator *it)
{
int rc;
- const char *npath;
struct cache_entry *ce;
struct cache_dfs_tgt *t;
if (!it)
return -EINVAL;
- rc = get_normalized_path(path, &npath);
- if (rc)
- return rc;
-
- cifs_dbg(FYI, "%s: path: %s\n", __func__, npath);
+ cifs_dbg(FYI, "%s: path: %s\n", __func__, path);
down_write(&htable_rw_lock);
- ce = lookup_cache_entry(npath, NULL);
+ ce = lookup_cache_entry(path);
if (IS_ERR(ce)) {
rc = PTR_ERR(ce);
goto out_unlock;
@@ -1092,8 +1138,6 @@ int dfs_cache_noreq_update_tgthint(const char *path,
out_unlock:
up_write(&htable_rw_lock);
- free_normalized_path(path, npath);
-
return rc;
}
@@ -1101,32 +1145,26 @@ out_unlock:
* dfs_cache_get_tgt_referral - returns a DFS referral (@ref) from a given
* target iterator (@it).
*
- * @path: path to lookup in DFS referral cache.
+ * @path: canonical DFS path to lookup in DFS referral cache.
* @it: DFS target iterator.
* @ref: DFS referral pointer to set up the gathered information.
*
* Return zero if the DFS referral was set up correctly, otherwise non-zero.
*/
-int dfs_cache_get_tgt_referral(const char *path,
- const struct dfs_cache_tgt_iterator *it,
+int dfs_cache_get_tgt_referral(const char *path, const struct dfs_cache_tgt_iterator *it,
struct dfs_info3_param *ref)
{
int rc;
- const char *npath;
struct cache_entry *ce;
if (!it || !ref)
return -EINVAL;
- rc = get_normalized_path(path, &npath);
- if (rc)
- return rc;
-
- cifs_dbg(FYI, "%s: path: %s\n", __func__, npath);
+ cifs_dbg(FYI, "%s: path: %s\n", __func__, path);
down_read(&htable_rw_lock);
- ce = lookup_cache_entry(npath, NULL);
+ ce = lookup_cache_entry(path);
if (IS_ERR(ce)) {
rc = PTR_ERR(ce);
goto out_unlock;
@@ -1138,132 +1176,55 @@ int dfs_cache_get_tgt_referral(const char *path,
out_unlock:
up_read(&htable_rw_lock);
- free_normalized_path(path, npath);
-
return rc;
}
/**
- * dfs_cache_add_vol - add a cifs context during mount() that will be handled by
- * DFS cache refresh worker.
- *
- * @mntdata: mount data.
- * @ctx: cifs context.
- * @fullpath: origin full path.
+ * dfs_cache_add_refsrv_session - add SMB session of referral server
*
- * Return zero if context was set up correctly, otherwise non-zero.
+ * @mount_id: mount group uuid to lookup.
+ * @ses: reference counted SMB session of referral server.
*/
-int dfs_cache_add_vol(char *mntdata, struct smb3_fs_context *ctx, const char *fullpath)
+void dfs_cache_add_refsrv_session(const uuid_t *mount_id, struct cifs_ses *ses)
{
- int rc;
- struct vol_info *vi;
-
- if (!ctx || !fullpath || !mntdata)
- return -EINVAL;
-
- cifs_dbg(FYI, "%s: fullpath: %s\n", __func__, fullpath);
-
- vi = kzalloc(sizeof(*vi), GFP_KERNEL);
- if (!vi)
- return -ENOMEM;
+ struct mount_group *mg;
- vi->fullpath = kstrdup(fullpath, GFP_KERNEL);
- if (!vi->fullpath) {
- rc = -ENOMEM;
- goto err_free_vi;
- }
-
- rc = smb3_fs_context_dup(&vi->ctx, ctx);
- if (rc)
- goto err_free_fullpath;
-
- vi->mntdata = mntdata;
- spin_lock_init(&vi->ctx_lock);
- kref_init(&vi->refcnt);
-
- spin_lock(&vol_list_lock);
- list_add_tail(&vi->list, &vol_list);
- spin_unlock(&vol_list_lock);
-
- return 0;
-
-err_free_fullpath:
- kfree(vi->fullpath);
-err_free_vi:
- kfree(vi);
- return rc;
-}
+ if (WARN_ON_ONCE(!mount_id || uuid_is_null(mount_id) || !ses))
+ return;
-/* Must be called with vol_list_lock held */
-static struct vol_info *find_vol(const char *fullpath)
-{
- struct vol_info *vi;
+ mg = get_mount_group(mount_id);
+ if (WARN_ON_ONCE(IS_ERR(mg)))
+ return;
- list_for_each_entry(vi, &vol_list, list) {
- cifs_dbg(FYI, "%s: vi->fullpath: %s\n", __func__, vi->fullpath);
- if (!strcasecmp(vi->fullpath, fullpath))
- return vi;
- }
- return ERR_PTR(-ENOENT);
+ spin_lock(&mg->lock);
+ if (mg->num_sessions < ARRAY_SIZE(mg->sessions))
+ mg->sessions[mg->num_sessions++] = ses;
+ spin_unlock(&mg->lock);
+ kref_put(&mg->refcount, mount_group_release);
}
/**
- * dfs_cache_update_vol - update vol info in DFS cache after failover
+ * dfs_cache_put_refsrv_sessions - put all referral server sessions
*
- * @fullpath: fullpath to look up in volume list.
- * @server: TCP ses pointer.
+ * Put all SMB sessions from the given mount group id.
*
- * Return zero if volume was updated, otherwise non-zero.
+ * @mount_id: mount group uuid to lookup.
*/
-int dfs_cache_update_vol(const char *fullpath, struct TCP_Server_Info *server)
+void dfs_cache_put_refsrv_sessions(const uuid_t *mount_id)
{
- struct vol_info *vi;
-
- if (!fullpath || !server)
- return -EINVAL;
-
- cifs_dbg(FYI, "%s: fullpath: %s\n", __func__, fullpath);
-
- spin_lock(&vol_list_lock);
- vi = find_vol(fullpath);
- if (IS_ERR(vi)) {
- spin_unlock(&vol_list_lock);
- return PTR_ERR(vi);
- }
- kref_get(&vi->refcnt);
- spin_unlock(&vol_list_lock);
-
- cifs_dbg(FYI, "%s: updating volume info\n", __func__);
- spin_lock(&vi->ctx_lock);
- memcpy(&vi->ctx.dstaddr, &server->dstaddr,
- sizeof(vi->ctx.dstaddr));
- spin_unlock(&vi->ctx_lock);
+ struct mount_group *mg;
- kref_put(&vi->refcnt, vol_release);
-
- return 0;
-}
-
-/**
- * dfs_cache_del_vol - remove volume info in DFS cache during umount()
- *
- * @fullpath: fullpath to look up in volume list.
- */
-void dfs_cache_del_vol(const char *fullpath)
-{
- struct vol_info *vi;
-
- if (!fullpath || !*fullpath)
+ if (!mount_id || uuid_is_null(mount_id))
return;
- cifs_dbg(FYI, "%s: fullpath: %s\n", __func__, fullpath);
-
- spin_lock(&vol_list_lock);
- vi = find_vol(fullpath);
- spin_unlock(&vol_list_lock);
-
- if (!IS_ERR(vi))
- kref_put(&vi->refcnt, vol_release);
+ mutex_lock(&mount_group_list_lock);
+ mg = find_mount_group_locked(mount_id);
+ if (IS_ERR(mg)) {
+ mutex_unlock(&mount_group_list_lock);
+ return;
+ }
+ mutex_unlock(&mount_group_list_lock);
+ kref_put(&mg->refcount, mount_group_release);
}
/**
@@ -1276,8 +1237,8 @@ void dfs_cache_del_vol(const char *fullpath)
*
* Return zero if target was parsed correctly, otherwise non-zero.
*/
-int dfs_cache_get_tgt_share(char *path, const struct dfs_cache_tgt_iterator *it,
- char **share, char **prefix)
+int dfs_cache_get_tgt_share(char *path, const struct dfs_cache_tgt_iterator *it, char **share,
+ char **prefix)
{
char *s, sep, *p;
size_t len;
@@ -1332,278 +1293,190 @@ int dfs_cache_get_tgt_share(char *path, const struct dfs_cache_tgt_iterator *it,
return 0;
}
-/* Get all tcons that are within a DFS namespace and can be refreshed */
-static void get_tcons(struct TCP_Server_Info *server, struct list_head *head)
+/*
+ * Refresh all active dfs mounts regardless of whether they are in cache or not.
+ * (cache can be cleared)
+ */
+static void refresh_mounts(struct cifs_ses **sessions)
{
+ struct TCP_Server_Info *server;
struct cifs_ses *ses;
- struct cifs_tcon *tcon;
+ struct cifs_tcon *tcon, *ntcon;
+ struct list_head tcons;
+ unsigned int xid;
- INIT_LIST_HEAD(head);
+ INIT_LIST_HEAD(&tcons);
spin_lock(&cifs_tcp_ses_lock);
- list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
- list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
- if (!tcon->need_reconnect && !tcon->need_reopen_files &&
- tcon->dfs_path) {
- tcon->tc_count++;
- list_add_tail(&tcon->ulist, head);
+ list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
+ list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
+ list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
+ if (tcon->dfs_path) {
+ tcon->tc_count++;
+ list_add_tail(&tcon->ulist, &tcons);
+ }
}
}
- if (ses->tcon_ipc && !ses->tcon_ipc->need_reconnect &&
- ses->tcon_ipc->dfs_path) {
- list_add_tail(&ses->tcon_ipc->ulist, head);
- }
}
spin_unlock(&cifs_tcp_ses_lock);
-}
-static bool is_dfs_link(const char *path)
-{
- char *s;
-
- s = strchr(path + 1, '\\');
- if (!s)
- return false;
- return !!strchr(s + 1, '\\');
-}
-
-static char *get_dfs_root(const char *path)
-{
- char *s, *npath;
-
- s = strchr(path + 1, '\\');
- if (!s)
- return ERR_PTR(-EINVAL);
-
- s = strchr(s + 1, '\\');
- if (!s)
- return ERR_PTR(-EINVAL);
-
- npath = kstrndup(path, s - path, GFP_KERNEL);
- if (!npath)
- return ERR_PTR(-ENOMEM);
+ list_for_each_entry_safe(tcon, ntcon, &tcons, ulist) {
+ const char *path = tcon->dfs_path + 1;
+ struct cache_entry *ce;
+ struct dfs_info3_param *refs = NULL;
+ int numrefs = 0;
+ bool needs_refresh = false;
+ int rc = 0;
- return npath;
-}
+ list_del_init(&tcon->ulist);
-static inline void put_tcp_server(struct TCP_Server_Info *server)
-{
- cifs_put_tcp_session(server, 0);
-}
+ ses = find_ipc_from_server_path(sessions, path);
+ if (IS_ERR(ses))
+ goto next_tcon;
-static struct TCP_Server_Info *get_tcp_server(struct smb3_fs_context *ctx)
-{
- struct TCP_Server_Info *server;
+ down_read(&htable_rw_lock);
+ ce = lookup_cache_entry(path);
+ needs_refresh = IS_ERR(ce) || cache_entry_expired(ce);
+ up_read(&htable_rw_lock);
- server = cifs_find_tcp_session(ctx);
- if (IS_ERR_OR_NULL(server))
- return NULL;
+ if (!needs_refresh)
+ goto next_tcon;
+
+ xid = get_xid();
+ rc = get_dfs_referral(xid, ses, path, &refs, &numrefs);
+ free_xid(xid);
+
+ /* Create or update a cache entry with the new referral */
+ if (!rc) {
+ down_write(&htable_rw_lock);
+ ce = lookup_cache_entry(path);
+ if (IS_ERR(ce))
+ add_cache_entry_locked(refs, numrefs);
+ else if (cache_entry_expired(ce))
+ update_cache_entry_locked(ce, refs, numrefs);
+ up_write(&htable_rw_lock);
+ }
- spin_lock(&GlobalMid_Lock);
- if (server->tcpStatus != CifsGood) {
- spin_unlock(&GlobalMid_Lock);
- put_tcp_server(server);
- return NULL;
+next_tcon:
+ free_dfs_info_array(refs, numrefs);
+ cifs_put_tcon(tcon);
}
- spin_unlock(&GlobalMid_Lock);
-
- return server;
}
-/* Find root SMB session out of a DFS link path */
-static struct cifs_ses *find_root_ses(struct vol_info *vi,
- struct cifs_tcon *tcon,
- const char *path)
+static void refresh_cache(struct cifs_ses **sessions)
{
- char *rpath;
- int rc;
- struct cache_entry *ce;
- struct dfs_info3_param ref = {0};
- char *mdata = NULL, *devname = NULL;
- struct TCP_Server_Info *server;
+ int i;
struct cifs_ses *ses;
- struct smb3_fs_context ctx = {NULL};
+ unsigned int xid;
+ char *ref_paths[CACHE_MAX_ENTRIES];
+ int count = 0;
+ struct cache_entry *ce;
- rpath = get_dfs_root(path);
- if (IS_ERR(rpath))
- return ERR_CAST(rpath);
+ /*
+ * Refresh all cached entries. Get all new referrals outside critical section to avoid
+ * starvation while performing SMB2 IOCTL on broken or slow connections.
+ * The cache entries may cover more paths than the active mounts
+ * (e.g. domain-based DFS referrals or multi tier DFS setups).
+ */
down_read(&htable_rw_lock);
+ for (i = 0; i < CACHE_HTABLE_SIZE; i++) {
+ struct hlist_head *l = &cache_htable[i];
- ce = lookup_cache_entry(rpath, NULL);
- if (IS_ERR(ce)) {
- up_read(&htable_rw_lock);
- ses = ERR_CAST(ce);
- goto out;
- }
-
- rc = setup_referral(path, ce, &ref, get_tgt_name(ce));
- if (rc) {
- up_read(&htable_rw_lock);
- ses = ERR_PTR(rc);
- goto out;
+ hlist_for_each_entry(ce, l, hlist) {
+ if (count == ARRAY_SIZE(ref_paths))
+ goto out_unlock;
+ if (hlist_unhashed(&ce->hlist) || !cache_entry_expired(ce) ||
+ IS_ERR(find_ipc_from_server_path(sessions, ce->path)))
+ continue;
+ ref_paths[count++] = kstrdup(ce->path, GFP_ATOMIC);
+ }
}
+out_unlock:
up_read(&htable_rw_lock);
- mdata = cifs_compose_mount_options(vi->mntdata, rpath, &ref,
- &devname);
- free_dfs_info_param(&ref);
-
- if (IS_ERR(mdata)) {
- ses = ERR_CAST(mdata);
- mdata = NULL;
- goto out;
- }
-
- rc = cifs_setup_volume_info(&ctx, NULL, devname);
-
- if (rc) {
- ses = ERR_PTR(rc);
- goto out;
- }
-
- server = get_tcp_server(&ctx);
- if (!server) {
- ses = ERR_PTR(-EHOSTDOWN);
- goto out;
- }
-
- ses = cifs_get_smb_ses(server, &ctx);
-
-out:
- smb3_cleanup_fs_context_contents(&ctx);
- kfree(mdata);
- kfree(rpath);
- kfree(devname);
-
- return ses;
-}
-
-/* Refresh DFS cache entry from a given tcon */
-static int refresh_tcon(struct vol_info *vi, struct cifs_tcon *tcon)
-{
- int rc = 0;
- unsigned int xid;
- const char *path, *npath;
- struct cache_entry *ce;
- struct cifs_ses *root_ses = NULL, *ses;
- struct dfs_info3_param *refs = NULL;
- int numrefs = 0;
-
- xid = get_xid();
-
- path = tcon->dfs_path + 1;
+ for (i = 0; i < count; i++) {
+ char *path = ref_paths[i];
+ struct dfs_info3_param *refs = NULL;
+ int numrefs = 0;
+ int rc = 0;
- rc = get_normalized_path(path, &npath);
- if (rc)
- goto out_free_xid;
-
- down_read(&htable_rw_lock);
-
- ce = lookup_cache_entry(npath, NULL);
- if (IS_ERR(ce)) {
- rc = PTR_ERR(ce);
- up_read(&htable_rw_lock);
- goto out_free_path;
- }
+ if (!path)
+ continue;
- if (!cache_entry_expired(ce)) {
- up_read(&htable_rw_lock);
- goto out_free_path;
- }
+ ses = find_ipc_from_server_path(sessions, path);
+ if (IS_ERR(ses))
+ goto next_referral;
- up_read(&htable_rw_lock);
+ xid = get_xid();
+ rc = get_dfs_referral(xid, ses, path, &refs, &numrefs);
+ free_xid(xid);
- /* If it's a DFS Link, then use root SMB session for refreshing it */
- if (is_dfs_link(npath)) {
- ses = root_ses = find_root_ses(vi, tcon, npath);
- if (IS_ERR(ses)) {
- rc = PTR_ERR(ses);
- root_ses = NULL;
- goto out_free_path;
+ if (!rc) {
+ down_write(&htable_rw_lock);
+ ce = lookup_cache_entry(path);
+ /*
+ * We need to re-check it because other tasks might have it deleted or
+ * updated.
+ */
+ if (!IS_ERR(ce) && cache_entry_expired(ce))
+ update_cache_entry_locked(ce, refs, numrefs);
+ up_write(&htable_rw_lock);
}
- } else {
- ses = tcon->ses;
- }
- rc = get_dfs_referral(xid, ses, cache_nlsc, tcon->remap, npath, &refs,
- &numrefs);
- if (!rc) {
- dump_refs(refs, numrefs);
- rc = update_cache_entry(npath, refs, numrefs);
+next_referral:
+ kfree(path);
free_dfs_info_array(refs, numrefs);
}
-
- if (root_ses)
- cifs_put_smb_ses(root_ses);
-
-out_free_path:
- free_normalized_path(path, npath);
-
-out_free_xid:
- free_xid(xid);
- return rc;
}
/*
- * Worker that will refresh DFS cache based on lowest TTL value from a DFS
+ * Worker that will refresh DFS cache and active mounts based on lowest TTL value from a DFS
* referral.
*/
static void refresh_cache_worker(struct work_struct *work)
{
- struct vol_info *vi, *nvi;
- struct TCP_Server_Info *server;
- LIST_HEAD(vols);
- LIST_HEAD(tcons);
- struct cifs_tcon *tcon, *ntcon;
- int rc;
-
- /*
- * Find SMB volumes that are eligible (server->tcpStatus == CifsGood)
- * for refreshing.
- */
- spin_lock(&vol_list_lock);
- list_for_each_entry(vi, &vol_list, list) {
- server = get_tcp_server(&vi->ctx);
- if (!server)
- continue;
-
- kref_get(&vi->refcnt);
- list_add_tail(&vi->rlist, &vols);
- put_tcp_server(server);
+ struct list_head mglist;
+ struct mount_group *mg, *tmp_mg;
+ struct cifs_ses *sessions[CACHE_MAX_ENTRIES + 1] = {NULL};
+ int max_sessions = ARRAY_SIZE(sessions) - 1;
+ int i = 0, count;
+
+ INIT_LIST_HEAD(&mglist);
+
+ /* Get refereces of mount groups */
+ mutex_lock(&mount_group_list_lock);
+ list_for_each_entry(mg, &mount_group_list, list) {
+ kref_get(&mg->refcount);
+ list_add(&mg->refresh_list, &mglist);
}
- spin_unlock(&vol_list_lock);
-
- /* Walk through all TCONs and refresh any expired cache entry */
- list_for_each_entry_safe(vi, nvi, &vols, rlist) {
- spin_lock(&vi->ctx_lock);
- server = get_tcp_server(&vi->ctx);
- spin_unlock(&vi->ctx_lock);
+ mutex_unlock(&mount_group_list_lock);
- if (!server)
- goto next_vol;
-
- get_tcons(server, &tcons);
- rc = 0;
-
- list_for_each_entry_safe(tcon, ntcon, &tcons, ulist) {
- /*
- * Skip tcp server if any of its tcons failed to refresh
- * (possibily due to reconnects).
- */
- if (!rc)
- rc = refresh_tcon(vi, tcon);
+ /* Fill in local array with an NULL-terminated list of all referral server sessions */
+ list_for_each_entry(mg, &mglist, refresh_list) {
+ if (i >= max_sessions)
+ break;
- list_del_init(&tcon->ulist);
- cifs_put_tcon(tcon);
- }
+ spin_lock(&mg->lock);
+ if (i + mg->num_sessions > max_sessions)
+ count = max_sessions - i;
+ else
+ count = mg->num_sessions;
+ memcpy(&sessions[i], mg->sessions, count * sizeof(mg->sessions[0]));
+ spin_unlock(&mg->lock);
+ i += count;
+ }
- put_tcp_server(server);
+ if (sessions[0]) {
+ /* Refresh all active mounts and cached entries */
+ refresh_mounts(sessions);
+ refresh_cache(sessions);
+ }
-next_vol:
- list_del_init(&vi->rlist);
- kref_put(&vi->refcnt, vol_release);
+ list_for_each_entry_safe(mg, tmp_mg, &mglist, refresh_list) {
+ list_del_init(&mg->refresh_list);
+ kref_put(&mg->refcount, mount_group_release);
}
spin_lock(&cache_ttl_lock);
diff --git a/fs/cifs/dfs_cache.h b/fs/cifs/dfs_cache.h
index 1afc4f590c47..b29d3ae64829 100644
--- a/fs/cifs/dfs_cache.h
+++ b/fs/cifs/dfs_cache.h
@@ -10,6 +10,7 @@
#include <linux/nls.h>
#include <linux/list.h>
+#include <linux/uuid.h>
#include "cifsglob.h"
struct dfs_cache_tgt_list {
@@ -23,34 +24,26 @@ struct dfs_cache_tgt_iterator {
struct list_head it_list;
};
-extern int dfs_cache_init(void);
-extern void dfs_cache_destroy(void);
+int dfs_cache_init(void);
+void dfs_cache_destroy(void);
extern const struct proc_ops dfscache_proc_ops;
-extern int dfs_cache_find(const unsigned int xid, struct cifs_ses *ses,
- const struct nls_table *nls_codepage, int remap,
- const char *path, struct dfs_info3_param *ref,
- struct dfs_cache_tgt_list *tgt_list);
-extern int dfs_cache_noreq_find(const char *path, struct dfs_info3_param *ref,
- struct dfs_cache_tgt_list *tgt_list);
-extern int dfs_cache_update_tgthint(const unsigned int xid,
- struct cifs_ses *ses,
- const struct nls_table *nls_codepage,
- int remap, const char *path,
- const struct dfs_cache_tgt_iterator *it);
-extern int
-dfs_cache_noreq_update_tgthint(const char *path,
- const struct dfs_cache_tgt_iterator *it);
-extern int dfs_cache_get_tgt_referral(const char *path,
- const struct dfs_cache_tgt_iterator *it,
- struct dfs_info3_param *ref);
-extern int dfs_cache_add_vol(char *mntdata, struct smb3_fs_context *ctx,
- const char *fullpath);
-extern int dfs_cache_update_vol(const char *fullpath,
- struct TCP_Server_Info *server);
-extern void dfs_cache_del_vol(const char *fullpath);
-extern int dfs_cache_get_tgt_share(char *path, const struct dfs_cache_tgt_iterator *it,
- char **share, char **prefix);
+int dfs_cache_find(const unsigned int xid, struct cifs_ses *ses, const struct nls_table *cp,
+ int remap, const char *path, struct dfs_info3_param *ref,
+ struct dfs_cache_tgt_list *tgt_list);
+int dfs_cache_noreq_find(const char *path, struct dfs_info3_param *ref,
+ struct dfs_cache_tgt_list *tgt_list);
+int dfs_cache_update_tgthint(const unsigned int xid, struct cifs_ses *ses,
+ const struct nls_table *cp, int remap, const char *path,
+ const struct dfs_cache_tgt_iterator *it);
+int dfs_cache_noreq_update_tgthint(const char *path, const struct dfs_cache_tgt_iterator *it);
+int dfs_cache_get_tgt_referral(const char *path, const struct dfs_cache_tgt_iterator *it,
+ struct dfs_info3_param *ref);
+int dfs_cache_get_tgt_share(char *path, const struct dfs_cache_tgt_iterator *it, char **share,
+ char **prefix);
+void dfs_cache_put_refsrv_sessions(const uuid_t *mount_id);
+void dfs_cache_add_refsrv_session(const uuid_t *mount_id, struct cifs_ses *ses);
+char *dfs_cache_canonical_path(const char *path, const struct nls_table *cp, int remap);
static inline struct dfs_cache_tgt_iterator *
dfs_cache_get_next_tgt(struct dfs_cache_tgt_list *tl,
diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c
index 6bcd3e8f7cda..79402ca0ddfa 100644
--- a/fs/cifs/dir.c
+++ b/fs/cifs/dir.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: LGPL-2.1
/*
* fs/cifs/dir.c
*
@@ -6,19 +7,6 @@
* Copyright (C) International Business Machines Corp., 2002,2009
* Author(s): Steve French (sfrench@us.ibm.com)
*
- * This library is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published
- * by the Free Software Foundation; either version 2.1 of the License, or
- * (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
- * the GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/fs.h>
#include <linux/stat.h>
@@ -396,10 +384,11 @@ cifs_create_set_dentry:
goto out_err;
}
- if (S_ISDIR(newinode->i_mode)) {
- rc = -EISDIR;
- goto out_err;
- }
+ if (newinode)
+ if (S_ISDIR(newinode->i_mode)) {
+ rc = -EISDIR;
+ goto out_err;
+ }
d_drop(direntry);
d_add(direntry, newinode);
@@ -630,6 +619,7 @@ cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry,
struct inode *newInode = NULL;
const char *full_path;
void *page;
+ int retry_count = 0;
xid = get_xid();
@@ -673,6 +663,7 @@ cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry,
cifs_dbg(FYI, "Full path: %s inode = 0x%p\n",
full_path, d_inode(direntry));
+again:
if (pTcon->posix_extensions)
rc = smb311_posix_get_inode_info(&newInode, full_path, parent_dir_inode->i_sb, xid);
else if (pTcon->unix_ext) {
@@ -687,6 +678,8 @@ cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry,
/* since paths are not looked up by component - the parent
directories are presumed to be good here */
renew_parental_timestamps(direntry);
+ } else if (rc == -EAGAIN && retry_count++ < 10) {
+ goto again;
} else if (rc == -ENOENT) {
cifs_set_time(direntry, jiffies);
newInode = NULL;
diff --git a/fs/cifs/dns_resolve.c b/fs/cifs/dns_resolve.c
index 534cbba72789..d15b82d569ef 100644
--- a/fs/cifs/dns_resolve.c
+++ b/fs/cifs/dns_resolve.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: LGPL-2.1
/*
* fs/cifs/dns_resolve.c
*
@@ -10,19 +11,6 @@
* Contains the CIFS DFS upcall routines used for hostname to
* IP address translation.
*
- * This library is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published
- * by the Free Software Foundation; either version 2.1 of the License, or
- * (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
- * the GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/slab.h>
diff --git a/fs/cifs/dns_resolve.h b/fs/cifs/dns_resolve.h
index d3f5d27f4d06..5be060b82b13 100644
--- a/fs/cifs/dns_resolve.h
+++ b/fs/cifs/dns_resolve.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: LGPL-2.1 */
/*
* fs/cifs/dns_resolve.h -- DNS Resolver upcall management for CIFS DFS
* Handles host name to IP address resolution
@@ -5,19 +6,6 @@
* Copyright (c) International Business Machines Corp., 2008
* Author(s): Steve French (sfrench@us.ibm.com)
*
- * This library is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published
- * by the Free Software Foundation; either version 2.1 of the License, or
- * (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
- * the GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef _DNS_RESOLVE_H
diff --git a/fs/cifs/export.c b/fs/cifs/export.c
index eb0bb8ca8e63..747a540db954 100644
--- a/fs/cifs/export.c
+++ b/fs/cifs/export.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: LGPL-2.1
/*
* fs/cifs/export.c
*
@@ -8,19 +9,6 @@
*
* Operations related to support for exporting files via NFSD
*
- * This library is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published
- * by the Free Software Foundation; either version 2.1 of the License, or
- * (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
- * the GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index 379a427f3c2f..cd108607a070 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: LGPL-2.1
/*
* fs/cifs/file.c
*
@@ -7,19 +8,6 @@
* Author(s): Steve French (sfrench@us.ibm.com)
* Jeremy Allison (jra@samba.org)
*
- * This library is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published
- * by the Free Software Foundation; either version 2.1 of the License, or
- * (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
- * the GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/fs.h>
#include <linux/backing-dev.h>
diff --git a/fs/cifs/fscache.c b/fs/cifs/fscache.c
index 20d24af33ee2..dd625033cd6b 100644
--- a/fs/cifs/fscache.c
+++ b/fs/cifs/fscache.c
@@ -1,22 +1,10 @@
+// SPDX-License-Identifier: LGPL-2.1
/*
* fs/cifs/fscache.c - CIFS filesystem cache interface
*
* Copyright (c) 2010 Novell, Inc.
* Author(s): Suresh Jayaraman <sjayaraman@suse.de>
*
- * This library is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published
- * by the Free Software Foundation; either version 2.1 of the License, or
- * (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
- * the GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "fscache.h"
#include "cifsglob.h"
diff --git a/fs/cifs/fscache.h b/fs/cifs/fscache.h
index e811f2dd7619..3d55cb2ef055 100644
--- a/fs/cifs/fscache.h
+++ b/fs/cifs/fscache.h
@@ -1,22 +1,10 @@
+/* SPDX-License-Identifier: LGPL-2.1 */
/*
* fs/cifs/fscache.h - CIFS filesystem cache interface definitions
*
* Copyright (c) 2010 Novell, Inc.
* Authors(s): Suresh Jayaraman (sjayaraman@suse.de>
*
- * This library is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published
- * by the Free Software Foundation; either version 2.1 of the License, or
- * (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
- * the GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef _CIFS_FSCACHE_H
#define _CIFS_FSCACHE_H
diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index 1dfa57982522..b96b253e7635 100644
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -1,22 +1,10 @@
+// SPDX-License-Identifier: LGPL-2.1
/*
* fs/cifs/inode.c
*
* Copyright (C) International Business Machines Corp., 2002,2010
* Author(s): Steve French (sfrench@us.ibm.com)
*
- * This library is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published
- * by the Free Software Foundation; either version 2.1 of the License, or
- * (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
- * the GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/fs.h>
#include <linux/stat.h>
@@ -367,9 +355,12 @@ cifs_get_file_info_unix(struct file *filp)
} else if (rc == -EREMOTE) {
cifs_create_dfs_fattr(&fattr, inode->i_sb);
rc = 0;
- }
+ } else
+ goto cifs_gfiunix_out;
rc = cifs_fattr_to_inode(inode, &fattr);
+
+cifs_gfiunix_out:
free_xid(xid);
return rc;
}
diff --git a/fs/cifs/ioctl.c b/fs/cifs/ioctl.c
index d67d281ab863..42c6a0bac6c8 100644
--- a/fs/cifs/ioctl.c
+++ b/fs/cifs/ioctl.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: LGPL-2.1
/*
* fs/cifs/ioctl.c
*
@@ -6,19 +7,6 @@
* Copyright (C) International Business Machines Corp., 2005,2013
* Author(s): Steve French (sfrench@us.ibm.com)
*
- * This library is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published
- * by the Free Software Foundation; either version 2.1 of the License, or
- * (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
- * the GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/fs.h>
diff --git a/fs/cifs/link.c b/fs/cifs/link.c
index 970fcf2adb08..f0a6d63bc08c 100644
--- a/fs/cifs/link.c
+++ b/fs/cifs/link.c
@@ -1,22 +1,10 @@
+// SPDX-License-Identifier: LGPL-2.1
/*
* fs/cifs/link.c
*
* Copyright (C) International Business Machines Corp., 2002,2008
* Author(s): Steve French (sfrench@us.ibm.com)
*
- * This library is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published
- * by the Free Software Foundation; either version 2.1 of the License, or
- * (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
- * the GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/fs.h>
#include <linux/stat.h>
diff --git a/fs/cifs/misc.c b/fs/cifs/misc.c
index 7207a63819cb..184138b4eb8c 100644
--- a/fs/cifs/misc.c
+++ b/fs/cifs/misc.c
@@ -1,22 +1,10 @@
+// SPDX-License-Identifier: LGPL-2.1
/*
* fs/cifs/misc.c
*
* Copyright (C) International Business Machines Corp., 2002,2008
* Author(s): Steve French (sfrench@us.ibm.com)
*
- * This library is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published
- * by the Free Software Foundation; either version 2.1 of the License, or
- * (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
- * the GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/slab.h>
diff --git a/fs/cifs/netlink.c b/fs/cifs/netlink.c
index 5aaabe4cc0a7..291cb606f149 100644
--- a/fs/cifs/netlink.c
+++ b/fs/cifs/netlink.c
@@ -30,7 +30,7 @@ static const struct nla_policy cifs_genl_policy[CIFS_GENL_ATTR_MAX + 1] = {
[CIFS_GENL_ATTR_SWN_RESOURCE_NAME] = { .type = NLA_STRING},
};
-static struct genl_ops cifs_genl_ops[] = {
+static const struct genl_ops cifs_genl_ops[] = {
{
.cmd = CIFS_GENL_CMD_SWN_NOTIFY,
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
diff --git a/fs/cifs/ntlmssp.h b/fs/cifs/ntlmssp.h
index 3079b38f0afb..378133ce8869 100644
--- a/fs/cifs/ntlmssp.h
+++ b/fs/cifs/ntlmssp.h
@@ -1,22 +1,10 @@
+/* SPDX-License-Identifier: LGPL-2.1 */
/*
* fs/cifs/ntlmssp.h
*
* Copyright (c) International Business Machines Corp., 2002,2007
* Author(s): Steve French (sfrench@us.ibm.com)
*
- * This library is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published
- * by the Free Software Foundation; either version 2.1 of the License, or
- * (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
- * the GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#define NTLMSSP_SIGNATURE "NTLMSSP"
diff --git a/fs/cifs/readdir.c b/fs/cifs/readdir.c
index 63bfc533c9fb..bfee176b901d 100644
--- a/fs/cifs/readdir.c
+++ b/fs/cifs/readdir.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: LGPL-2.1
/*
* fs/cifs/readdir.c
*
@@ -7,19 +8,6 @@
* Copyright (C) Red Hat, Inc., 2011
* Author(s): Steve French (sfrench@us.ibm.com)
*
- * This library is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published
- * by the Free Software Foundation; either version 2.1 of the License, or
- * (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
- * the GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/fs.h>
#include <linux/pagemap.h>
@@ -321,7 +309,7 @@ static void cifs_fulldir_info_to_fattr(struct cifs_fattr *fattr,
{
__dir_info_to_fattr(fattr, info);
- /* See MS-FSCC 2.4.18 FileIdFullDirectoryInformation */
+ /* See MS-FSCC 2.4.19 FileIdFullDirectoryInformation */
if (fattr->cf_cifsattrs & ATTR_REPARSE)
fattr->cf_cifstag = le32_to_cpu(info->EaSize);
cifs_fill_common_info(fattr, cifs_sb);
diff --git a/fs/cifs/rfc1002pdu.h b/fs/cifs/rfc1002pdu.h
index 8b69fcceb597..137f7c95afd6 100644
--- a/fs/cifs/rfc1002pdu.h
+++ b/fs/cifs/rfc1002pdu.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: LGPL-2.1 */
/*
* fs/cifs/rfc1002pdu.h
*
@@ -6,19 +7,6 @@
* Copyright (c) International Business Machines Corp., 2004
* Author(s): Steve French (sfrench@us.ibm.com)
*
- * This library is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published
- * by the Free Software Foundation; either version 2.1 of the License, or
- * (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
- * the GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/* NB: unlike smb/cifs packets, the RFC1002 structures are big endian */
diff --git a/fs/cifs/sess.c b/fs/cifs/sess.c
index a92a1fb7cb52..c5785fd3f52e 100644
--- a/fs/cifs/sess.c
+++ b/fs/cifs/sess.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: LGPL-2.1
/*
* fs/cifs/sess.c
*
@@ -6,19 +7,6 @@
* Copyright (c) International Business Machines Corp., 2006, 2009
* Author(s): Steve French (sfrench@us.ibm.com)
*
- * This library is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published
- * by the Free Software Foundation; either version 2.1 of the License, or
- * (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
- * the GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "cifspdu.h"
@@ -195,7 +183,7 @@ cifs_ses_add_channel(struct cifs_sb_info *cifs_sb, struct cifs_ses *ses,
ses, iface->speed, iface->rdma_capable ? "yes" : "no",
&ipv4->sin_addr);
else
- cifs_dbg(FYI, "adding channel to ses %p (speed:%zu bps rdma:%s ip:%pI4)\n",
+ cifs_dbg(FYI, "adding channel to ses %p (speed:%zu bps rdma:%s ip:%pI6)\n",
ses, iface->speed, iface->rdma_capable ? "yes" : "no",
&ipv6->sin6_addr);
diff --git a/fs/cifs/smb2file.c b/fs/cifs/smb2file.c
index 2fa3ba354cc9..c9d8a50062b8 100644
--- a/fs/cifs/smb2file.c
+++ b/fs/cifs/smb2file.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: LGPL-2.1
/*
* fs/cifs/smb2file.c
*
@@ -5,19 +6,6 @@
* Author(s): Steve French (sfrench@us.ibm.com),
* Pavel Shilovsky ((pshilovsky@samba.org) 2012
*
- * This library is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published
- * by the Free Software Foundation; either version 2.1 of the License, or
- * (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
- * the GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/fs.h>
#include <linux/stat.h>
diff --git a/fs/cifs/smb2glob.h b/fs/cifs/smb2glob.h
index d9a990c99121..d0e9f3782bd9 100644
--- a/fs/cifs/smb2glob.h
+++ b/fs/cifs/smb2glob.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: LGPL-2.1 */
/*
* fs/cifs/smb2glob.h
*
@@ -9,16 +10,6 @@
* Jeremy Allison (jra@samba.org)
* Pavel Shilovsky (pshilovsky@samba.org) 2012
*
- * This library is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published
- * by the Free Software Foundation; either version 2.1 of the License, or
- * (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
- * the GNU Lesser General Public License for more details.
- *
*/
#ifndef _SMB2_GLOB_H
#define _SMB2_GLOB_H
diff --git a/fs/cifs/smb2inode.c b/fs/cifs/smb2inode.c
index 9a61209a283e..957b2594f02e 100644
--- a/fs/cifs/smb2inode.c
+++ b/fs/cifs/smb2inode.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: LGPL-2.1
/*
* fs/cifs/smb2inode.c
*
@@ -6,19 +7,6 @@
* Author(s): Pavel Shilovsky (pshilovsky@samba.org),
* Steve French (sfrench@us.ibm.com)
*
- * This library is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published
- * by the Free Software Foundation; either version 2.1 of the License, or
- * (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
- * the GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/fs.h>
#include <linux/stat.h>
diff --git a/fs/cifs/smb2maperror.c b/fs/cifs/smb2maperror.c
index c775682ee973..cea39bcecbab 100644
--- a/fs/cifs/smb2maperror.c
+++ b/fs/cifs/smb2maperror.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: LGPL-2.1
/*
* fs/smb2/smb2maperror.c
*
@@ -6,19 +7,6 @@
* Copyright (C) International Business Machines Corp., 2009
* Author(s): Steve French (sfrench@us.ibm.com)
*
- * This library is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published
- * by the Free Software Foundation; either version 2.1 of the License, or
- * (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
- * the GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/errno.h>
#include "cifsglob.h"
diff --git a/fs/cifs/smb2misc.c b/fs/cifs/smb2misc.c
index 06d555d4da9a..668f77108831 100644
--- a/fs/cifs/smb2misc.c
+++ b/fs/cifs/smb2misc.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: LGPL-2.1
/*
* fs/cifs/smb2misc.c
*
@@ -6,19 +7,6 @@
* Author(s): Steve French (sfrench@us.ibm.com)
* Pavel Shilovsky (pshilovsky@samba.org) 2012
*
- * This library is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published
- * by the Free Software Foundation; either version 2.1 of the License, or
- * (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
- * the GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/ctype.h>
#include "smb2pdu.h"
@@ -164,19 +152,16 @@ smb2_check_message(char *buf, unsigned int len, struct TCP_Server_Info *srvr)
struct smb2_transform_hdr *thdr =
(struct smb2_transform_hdr *)buf;
struct cifs_ses *ses = NULL;
- struct list_head *tmp;
/* decrypt frame now that it is completely read in */
spin_lock(&cifs_tcp_ses_lock);
- list_for_each(tmp, &srvr->smb_ses_list) {
- ses = list_entry(tmp, struct cifs_ses, smb_ses_list);
+ list_for_each_entry(ses, &srvr->smb_ses_list, smb_ses_list) {
if (ses->Suid == thdr->SessionId)
break;
-
- ses = NULL;
}
spin_unlock(&cifs_tcp_ses_lock);
- if (ses == NULL) {
+ if (list_entry_is_head(ses, &srvr->smb_ses_list,
+ smb_ses_list)) {
cifs_dbg(VFS, "no decryption - session id not found\n");
return 1;
}
@@ -548,7 +533,6 @@ static bool
smb2_tcon_has_lease(struct cifs_tcon *tcon, struct smb2_lease_break *rsp)
{
__u8 lease_state;
- struct list_head *tmp;
struct cifsFileInfo *cfile;
struct cifsInodeInfo *cinode;
int ack_req = le32_to_cpu(rsp->Flags &
@@ -556,8 +540,7 @@ smb2_tcon_has_lease(struct cifs_tcon *tcon, struct smb2_lease_break *rsp)
lease_state = le32_to_cpu(rsp->NewLeaseState);
- list_for_each(tmp, &tcon->openFileList) {
- cfile = list_entry(tmp, struct cifsFileInfo, tlist);
+ list_for_each_entry(cfile, &tcon->openFileList, tlist) {
cinode = CIFS_I(d_inode(cfile->dentry));
if (memcmp(cinode->lease_key, rsp->LeaseKey,
@@ -618,7 +601,6 @@ static bool
smb2_is_valid_lease_break(char *buffer)
{
struct smb2_lease_break *rsp = (struct smb2_lease_break *)buffer;
- struct list_head *tmp, *tmp1, *tmp2;
struct TCP_Server_Info *server;
struct cifs_ses *ses;
struct cifs_tcon *tcon;
@@ -628,15 +610,9 @@ smb2_is_valid_lease_break(char *buffer)
/* look up tcon based on tid & uid */
spin_lock(&cifs_tcp_ses_lock);
- list_for_each(tmp, &cifs_tcp_ses_list) {
- server = list_entry(tmp, struct TCP_Server_Info, tcp_ses_list);
-
- list_for_each(tmp1, &server->smb_ses_list) {
- ses = list_entry(tmp1, struct cifs_ses, smb_ses_list);
-
- list_for_each(tmp2, &ses->tcon_list) {
- tcon = list_entry(tmp2, struct cifs_tcon,
- tcon_list);
+ list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
+ list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
+ list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
spin_lock(&tcon->open_file_lock);
cifs_stats_inc(
&tcon->stats.cifs_stats.num_oplock_brks);
@@ -687,7 +663,6 @@ bool
smb2_is_valid_oplock_break(char *buffer, struct TCP_Server_Info *server)
{
struct smb2_oplock_break *rsp = (struct smb2_oplock_break *)buffer;
- struct list_head *tmp, *tmp1, *tmp2;
struct cifs_ses *ses;
struct cifs_tcon *tcon;
struct cifsInodeInfo *cinode;
@@ -710,16 +685,11 @@ smb2_is_valid_oplock_break(char *buffer, struct TCP_Server_Info *server)
/* look up tcon based on tid & uid */
spin_lock(&cifs_tcp_ses_lock);
- list_for_each(tmp, &server->smb_ses_list) {
- ses = list_entry(tmp, struct cifs_ses, smb_ses_list);
-
- list_for_each(tmp1, &ses->tcon_list) {
- tcon = list_entry(tmp1, struct cifs_tcon, tcon_list);
+ list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
+ list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
spin_lock(&tcon->open_file_lock);
- list_for_each(tmp2, &tcon->openFileList) {
- cfile = list_entry(tmp2, struct cifsFileInfo,
- tlist);
+ list_for_each_entry(cfile, &tcon->openFileList, tlist) {
if (rsp->PersistentFid !=
cfile->fid.persistent_fid ||
rsp->VolatileFid !=
diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
index 21ef51d338e0..e4c8f603dd58 100644
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -388,7 +388,9 @@ smb2_negotiate(const unsigned int xid, struct cifs_ses *ses)
{
int rc;
+ spin_lock(&GlobalMid_Lock);
cifs_ses_server(ses)->CurrentMid = 0;
+ spin_unlock(&GlobalMid_Lock);
rc = SMB2_negotiate(xid, ses);
/* BB we probably don't need to retry with modern servers */
if (rc == -EAGAIN)
@@ -2325,6 +2327,7 @@ smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
struct smb2_query_directory_rsp *qd_rsp = NULL;
struct smb2_create_rsp *op_rsp = NULL;
struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
+ int retry_count = 0;
utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
if (!utf16_path)
@@ -2372,10 +2375,14 @@ smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
smb2_set_related(&rqst[1]);
+again:
rc = compound_send_recv(xid, tcon->ses, server,
flags, 2, rqst,
resp_buftype, rsp_iov);
+ if (rc == -EAGAIN && retry_count++ < 10)
+ goto again;
+
/* If the open failed there is nothing to do */
op_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base;
if (op_rsp == NULL || op_rsp->sync_hdr.Status != STATUS_SUCCESS) {
@@ -3601,6 +3608,119 @@ static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
return rc;
}
+static int smb3_simple_fallocate_write_range(unsigned int xid,
+ struct cifs_tcon *tcon,
+ struct cifsFileInfo *cfile,
+ loff_t off, loff_t len,
+ char *buf)
+{
+ struct cifs_io_parms io_parms = {0};
+ int nbytes;
+ struct kvec iov[2];
+
+ io_parms.netfid = cfile->fid.netfid;
+ io_parms.pid = current->tgid;
+ io_parms.tcon = tcon;
+ io_parms.persistent_fid = cfile->fid.persistent_fid;
+ io_parms.volatile_fid = cfile->fid.volatile_fid;
+ io_parms.offset = off;
+ io_parms.length = len;
+
+ /* iov[0] is reserved for smb header */
+ iov[1].iov_base = buf;
+ iov[1].iov_len = io_parms.length;
+ return SMB2_write(xid, &io_parms, &nbytes, iov, 1);
+}
+
+static int smb3_simple_fallocate_range(unsigned int xid,
+ struct cifs_tcon *tcon,
+ struct cifsFileInfo *cfile,
+ loff_t off, loff_t len)
+{
+ struct file_allocated_range_buffer in_data, *out_data = NULL, *tmp_data;
+ u32 out_data_len;
+ char *buf = NULL;
+ loff_t l;
+ int rc;
+
+ in_data.file_offset = cpu_to_le64(off);
+ in_data.length = cpu_to_le64(len);
+ rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
+ cfile->fid.volatile_fid,
+ FSCTL_QUERY_ALLOCATED_RANGES, true,
+ (char *)&in_data, sizeof(in_data),
+ 1024 * sizeof(struct file_allocated_range_buffer),
+ (char **)&out_data, &out_data_len);
+ if (rc)
+ goto out;
+ /*
+ * It is already all allocated
+ */
+ if (out_data_len == 0)
+ goto out;
+
+ buf = kzalloc(1024 * 1024, GFP_KERNEL);
+ if (buf == NULL) {
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ tmp_data = out_data;
+ while (len) {
+ /*
+ * The rest of the region is unmapped so write it all.
+ */
+ if (out_data_len == 0) {
+ rc = smb3_simple_fallocate_write_range(xid, tcon,
+ cfile, off, len, buf);
+ goto out;
+ }
+
+ if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
+ rc = -EINVAL;
+ goto out;
+ }
+
+ if (off < le64_to_cpu(tmp_data->file_offset)) {
+ /*
+ * We are at a hole. Write until the end of the region
+ * or until the next allocated data,
+ * whichever comes next.
+ */
+ l = le64_to_cpu(tmp_data->file_offset) - off;
+ if (len < l)
+ l = len;
+ rc = smb3_simple_fallocate_write_range(xid, tcon,
+ cfile, off, l, buf);
+ if (rc)
+ goto out;
+ off = off + l;
+ len = len - l;
+ if (len == 0)
+ goto out;
+ }
+ /*
+ * We are at a section of allocated data, just skip forward
+ * until the end of the data or the end of the region
+ * we are supposed to fallocate, whichever comes first.
+ */
+ l = le64_to_cpu(tmp_data->length);
+ if (len < l)
+ l = len;
+ off += l;
+ len -= l;
+
+ tmp_data = &tmp_data[1];
+ out_data_len -= sizeof(struct file_allocated_range_buffer);
+ }
+
+ out:
+ kfree(out_data);
+ kfree(buf);
+ return rc;
+}
+
+
static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
loff_t off, loff_t len, bool keep_size)
{
@@ -3662,6 +3782,26 @@ static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
/*
+ * At this point, we are trying to fallocate an internal
+ * regions of a sparse file. Since smb2 does not have a
+ * fallocate command we have two otions on how to emulate this.
+ * We can either turn the entire file to become non-sparse
+ * which we only do if the fallocate is for virtually
+ * the whole file, or we can overwrite the region with zeroes
+ * using SMB2_write, which could be prohibitevly expensive
+ * if len is large.
+ */
+ /*
+ * We are only trying to fallocate a small region so
+ * just write it with zero.
+ */
+ if (len <= 1024 * 1024) {
+ rc = smb3_simple_fallocate_range(xid, tcon, cfile,
+ off, len);
+ goto out;
+ }
+
+ /*
* Check if falloc starts within first few pages of file
* and ends within a few pages of the end of file to
* ensure that most of file is being forced to be
diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c
index c205f93e0a10..962826dc3316 100644
--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: LGPL-2.1
/*
* fs/cifs/smb2pdu.c
*
@@ -8,19 +9,6 @@
*
* Contains the routines for constructing the SMB2 PDUs themselves
*
- * This library is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published
- * by the Free Software Foundation; either version 2.1 of the License, or
- * (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
- * the GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/* SMB2 PDU handling routines here - except for leftovers (eg session setup) */
@@ -1791,10 +1779,8 @@ SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree,
rsp = (struct smb2_tree_connect_rsp *)rsp_iov.iov_base;
trace_smb3_tcon(xid, tcon->tid, ses->Suid, tree, rc);
if (rc != 0) {
- if (tcon) {
- cifs_stats_fail_inc(tcon, SMB2_TREE_CONNECT_HE);
- tcon->need_reconnect = true;
- }
+ cifs_stats_fail_inc(tcon, SMB2_TREE_CONNECT_HE);
+ tcon->need_reconnect = true;
goto tcon_error_exit;
}
@@ -2906,7 +2892,10 @@ SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
#endif /* CIFS_DEBUG2 */
if (buf) {
- memcpy(buf, &rsp->CreationTime, 32);
+ buf->CreationTime = rsp->CreationTime;
+ buf->LastAccessTime = rsp->LastAccessTime;
+ buf->LastWriteTime = rsp->LastWriteTime;
+ buf->ChangeTime = rsp->ChangeTime;
buf->AllocationSize = rsp->AllocationSize;
buf->EndOfFile = rsp->EndofFile;
buf->Attributes = rsp->FileAttributes;
@@ -3484,6 +3473,8 @@ int SMB2_query_info(const unsigned int xid, struct cifs_tcon *tcon,
NULL);
}
+#if 0
+/* currently unused, as now we are doing compounding instead (see smb311_posix_query_path_info) */
int
SMB311_posix_query_info(const unsigned int xid, struct cifs_tcon *tcon,
u64 persistent_fid, u64 volatile_fid, struct smb311_posix_qinfo *data, u32 *plen)
@@ -3495,7 +3486,9 @@ SMB311_posix_query_info(const unsigned int xid, struct cifs_tcon *tcon,
return query_info(xid, tcon, persistent_fid, volatile_fid,
SMB_FIND_FILE_POSIX_INFO, SMB2_O_INFO_FILE, 0,
output_len, sizeof(struct smb311_posix_qinfo), (void **)&data, plen);
+ /* Note caller must free "data" (passed in above). It may be allocated in query_info call */
}
+#endif
int
SMB2_query_acl(const unsigned int xid, struct cifs_tcon *tcon,
@@ -4498,7 +4491,7 @@ int posix_info_parse(const void *beg, const void *end,
{
int total_len = 0;
- int sid_len;
+ int owner_len, group_len;
int name_len;
const void *owner_sid;
const void *group_sid;
@@ -4521,17 +4514,17 @@ int posix_info_parse(const void *beg, const void *end,
/* check owner sid */
owner_sid = beg + total_len;
- sid_len = posix_info_sid_size(owner_sid, end);
- if (sid_len < 0)
+ owner_len = posix_info_sid_size(owner_sid, end);
+ if (owner_len < 0)
return -1;
- total_len += sid_len;
+ total_len += owner_len;
/* check group sid */
group_sid = beg + total_len;
- sid_len = posix_info_sid_size(group_sid, end);
- if (sid_len < 0)
+ group_len = posix_info_sid_size(group_sid, end);
+ if (group_len < 0)
return -1;
- total_len += sid_len;
+ total_len += group_len;
/* check name len */
if (beg + total_len + 4 > end)
@@ -4552,10 +4545,8 @@ int posix_info_parse(const void *beg, const void *end,
out->size = total_len;
out->name_len = name_len;
out->name = name;
- memcpy(&out->owner, owner_sid,
- posix_info_sid_size(owner_sid, end));
- memcpy(&out->group, group_sid,
- posix_info_sid_size(group_sid, end));
+ memcpy(&out->owner, owner_sid, owner_len);
+ memcpy(&out->group, group_sid, group_len);
}
return total_len;
}
diff --git a/fs/cifs/smb2pdu.h b/fs/cifs/smb2pdu.h
index 6442dc1c292b..a5c48b85549a 100644
--- a/fs/cifs/smb2pdu.h
+++ b/fs/cifs/smb2pdu.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: LGPL-2.1 */
/*
* fs/cifs/smb2pdu.h
*
@@ -6,19 +7,6 @@
* Author(s): Steve French (sfrench@us.ibm.com)
* Pavel Shilovsky (pshilovsky@samba.org) 2012
*
- * This library is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published
- * by the Free Software Foundation; either version 2.1 of the License, or
- * (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
- * the GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef _SMB2PDU_H
@@ -276,7 +264,7 @@ struct share_redirect_error_context_rsp {
__le32 NotificationType;
__le32 ResourceNameOffset;
__le32 ResourceNameLength;
- __le16 Flags;
+ __le16 Reserved;
__le16 TargetType;
__le32 IPAddrCount;
struct move_dst_ipaddr IpAddrMoveList[];
@@ -1460,6 +1448,22 @@ struct smb2_echo_rsp {
#define SMB2_QUERY_DIRECTORY_IOV_SIZE 2
+/*
+ * Valid FileInformation classes.
+ *
+ * Note that these are a subset of the (file) QUERY_INFO levels defined
+ * later in this file (but since QUERY_DIRECTORY uses equivalent numbers
+ * we do not redefine them here)
+ *
+ * FileDirectoryInfomation 0x01
+ * FileFullDirectoryInformation 0x02
+ * FileIdFullDirectoryInformation 0x26
+ * FileBothDirectoryInformation 0x03
+ * FileIdBothDirectoryInformation 0x25
+ * FileNamesInformation 0x0C
+ * FileIdExtdDirectoryInformation 0x3C
+ */
+
struct smb2_query_directory_req {
struct smb2_sync_hdr sync_hdr;
__le16 StructureSize; /* Must be 33 */
@@ -1696,6 +1700,7 @@ struct smb3_fs_vol_info {
#define FILEID_GLOBAL_TX_DIRECTORY_INFORMATION 50
#define FILE_STANDARD_LINK_INFORMATION 54
#define FILE_ID_INFORMATION 59
+#define FILE_ID_EXTD_DIRECTORY_INFORMATION 60
struct smb2_file_internal_info {
__le64 IndexNumber;
@@ -1776,13 +1781,31 @@ struct smb2_file_network_open_info {
__le32 Reserved;
} __packed; /* level 34 Query also similar returned in close rsp and open rsp */
-/* See MS-FSCC 2.4.43 */
+/* See MS-FSCC 2.4.21 */
struct smb2_file_id_information {
__le64 VolumeSerialNumber;
__u64 PersistentFileId; /* opaque endianness */
__u64 VolatileFileId; /* opaque endianness */
} __packed; /* level 59 */
+/* See MS-FSCC 2.4.18 */
+struct smb2_file_id_extd_directory_info {
+ __le32 NextEntryOffset;
+ __u32 FileIndex;
+ __le64 CreationTime;
+ __le64 LastAccessTime;
+ __le64 LastWriteTime;
+ __le64 ChangeTime;
+ __le64 EndOfFile;
+ __le64 AllocationSize;
+ __le32 FileAttributes;
+ __le32 FileNameLength;
+ __le32 EaSize; /* EA size */
+ __le32 ReparsePointTag; /* valid if FILE_ATTR_REPARSE_POINT set in FileAttributes */
+ __le64 UniqueId; /* inode num - le since Samba puts ino in low 32 bit */
+ char FileName[1];
+} __packed; /* level 60 */
+
extern char smb2_padding[7];
/* equivalent of the contents of SMB3.1.1 POSIX open context response */
diff --git a/fs/cifs/smb2proto.h b/fs/cifs/smb2proto.h
index a5f87b02cfaf..263767f644f8 100644
--- a/fs/cifs/smb2proto.h
+++ b/fs/cifs/smb2proto.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: LGPL-2.1 */
/*
* fs/cifs/smb2proto.h
*
@@ -6,19 +7,6 @@
* Author(s): Steve French (sfrench@us.ibm.com)
* Pavel Shilovsky (pshilovsky@samba.org) 2012
*
- * This library is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published
- * by the Free Software Foundation; either version 2.1 of the License, or
- * (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
- * the GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef _SMB2PROTO_H
#define _SMB2PROTO_H
@@ -64,8 +52,6 @@ extern void smb2_echo_request(struct work_struct *work);
extern __le32 smb2_get_lease_state(struct cifsInodeInfo *cinode);
extern bool smb2_is_valid_oplock_break(char *buffer,
struct TCP_Server_Info *srv);
-extern struct cifs_ses *smb2_find_smb_ses(struct TCP_Server_Info *server,
- __u64 ses_id);
extern int smb3_handle_read_data(struct TCP_Server_Info *server,
struct mid_q_entry *mid);
diff --git a/fs/cifs/smb2status.h b/fs/cifs/smb2status.h
index 7505056e9580..0215ef36e240 100644
--- a/fs/cifs/smb2status.h
+++ b/fs/cifs/smb2status.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: LGPL-2.1 */
/*
* fs/cifs/smb2status.h
*
@@ -7,19 +8,6 @@
* Copyright (c) International Business Machines Corp., 2009,2011
* Author(s): Steve French (sfrench@us.ibm.com)
*
- * This library is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published
- * by the Free Software Foundation; either version 2.1 of the License, or
- * (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
- * the GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
diff --git a/fs/cifs/smb2transport.c b/fs/cifs/smb2transport.c
index e6fa76ab70be..6f7952ea4941 100644
--- a/fs/cifs/smb2transport.c
+++ b/fs/cifs/smb2transport.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: LGPL-2.1
/*
* fs/cifs/smb2transport.c
*
@@ -7,19 +8,6 @@
* Jeremy Allison (jra@samba.org) 2006
* Pavel Shilovsky (pshilovsky@samba.org) 2012
*
- * This library is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published
- * by the Free Software Foundation; either version 2.1 of the License, or
- * (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
- * the GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/fs.h>
@@ -154,6 +142,7 @@ smb2_find_smb_ses_unlocked(struct TCP_Server_Info *server, __u64 ses_id)
list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
if (ses->Suid != ses_id)
continue;
+ ++ses->ses_count;
return ses;
}
@@ -205,7 +194,14 @@ smb2_find_smb_tcon(struct TCP_Server_Info *server, __u64 ses_id, __u32 tid)
return NULL;
}
tcon = smb2_find_smb_sess_tcon_unlocked(ses, tid);
+ if (!tcon) {
+ cifs_put_smb_ses(ses);
+ spin_unlock(&cifs_tcp_ses_lock);
+ return NULL;
+ }
spin_unlock(&cifs_tcp_ses_lock);
+ /* tcon already has a ref to ses, so we don't need ses anymore */
+ cifs_put_smb_ses(ses);
return tcon;
}
@@ -239,7 +235,7 @@ smb2_calc_signature(struct smb_rqst *rqst, struct TCP_Server_Info *server,
if (rc) {
cifs_server_dbg(VFS,
"%s: sha256 alloc failed\n", __func__);
- return rc;
+ goto out;
}
shash = &sdesc->shash;
} else {
@@ -290,6 +286,8 @@ smb2_calc_signature(struct smb_rqst *rqst, struct TCP_Server_Info *server,
out:
if (allocate_crypto)
cifs_free_hash(&hash, &sdesc);
+ if (ses)
+ cifs_put_smb_ses(ses);
return rc;
}
diff --git a/fs/cifs/smbdirect.c b/fs/cifs/smbdirect.c
index 10dfe5006792..31ef64eb7fbb 100644
--- a/fs/cifs/smbdirect.c
+++ b/fs/cifs/smbdirect.c
@@ -572,8 +572,13 @@ static struct rdma_cm_id *smbd_create_id(
log_rdma_event(ERR, "rdma_resolve_addr() failed %i\n", rc);
goto out;
}
- wait_for_completion_interruptible_timeout(
+ rc = wait_for_completion_interruptible_timeout(
&info->ri_done, msecs_to_jiffies(RDMA_RESOLVE_TIMEOUT));
+ /* e.g. if interrupted returns -ERESTARTSYS */
+ if (rc < 0) {
+ log_rdma_event(ERR, "rdma_resolve_addr timeout rc: %i\n", rc);
+ goto out;
+ }
rc = info->ri_rc;
if (rc) {
log_rdma_event(ERR, "rdma_resolve_addr() completed %i\n", rc);
@@ -586,8 +591,13 @@ static struct rdma_cm_id *smbd_create_id(
log_rdma_event(ERR, "rdma_resolve_route() failed %i\n", rc);
goto out;
}
- wait_for_completion_interruptible_timeout(
+ rc = wait_for_completion_interruptible_timeout(
&info->ri_done, msecs_to_jiffies(RDMA_RESOLVE_TIMEOUT));
+ /* e.g. if interrupted returns -ERESTARTSYS */
+ if (rc < 0) {
+ log_rdma_event(ERR, "rdma_resolve_addr timeout rc: %i\n", rc);
+ goto out;
+ }
rc = info->ri_rc;
if (rc) {
log_rdma_event(ERR, "rdma_resolve_route() completed %i\n", rc);
diff --git a/fs/cifs/smberr.h b/fs/cifs/smberr.h
index 7f16cb825fe5..60189efb3236 100644
--- a/fs/cifs/smberr.h
+++ b/fs/cifs/smberr.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: LGPL-2.1 */
/*
* fs/cifs/smberr.h
*
@@ -7,19 +8,6 @@
* See Error Codes section of the SNIA CIFS Specification
* for more information
*
- * This library is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published
- * by the Free Software Foundation; either version 2.1 of the License, or
- * (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
- * the GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#define SUCCESS 0x00 /* The request was successful. */
diff --git a/fs/cifs/smbfsctl.h b/fs/cifs/smbfsctl.h
index a0e84747f567..d0fc42061f49 100644
--- a/fs/cifs/smbfsctl.h
+++ b/fs/cifs/smbfsctl.h
@@ -1,22 +1,10 @@
+/* SPDX-License-Identifier: LGPL-2.1 */
/*
* fs/cifs/smbfsctl.h: SMB, CIFS, SMB2 FSCTL definitions
*
* Copyright (c) International Business Machines Corp., 2002,2013
* Author(s): Steve French (sfrench@us.ibm.com)
*
- * This library is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published
- * by the Free Software Foundation; either version 2.1 of the License, or
- * (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
- * the GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/* IOCTL information */
diff --git a/fs/cifs/transport.c b/fs/cifs/transport.c
index c1725b55f364..f65f9a692ca2 100644
--- a/fs/cifs/transport.c
+++ b/fs/cifs/transport.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: LGPL-2.1
/*
* fs/cifs/transport.c
*
@@ -5,19 +6,6 @@
* Author(s): Steve French (sfrench@us.ibm.com)
* Jeremy Allison (jra@samba.org) 2006.
*
- * This library is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published
- * by the Free Software Foundation; either version 2.1 of the License, or
- * (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
- * the GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/fs.h>
diff --git a/fs/cifs/xattr.c b/fs/cifs/xattr.c
index aa3e8ca0457c..9ed481e79ce0 100644
--- a/fs/cifs/xattr.c
+++ b/fs/cifs/xattr.c
@@ -1,22 +1,10 @@
+// SPDX-License-Identifier: LGPL-2.1
/*
* fs/cifs/xattr.c
*
* Copyright (c) International Business Machines Corp., 2003, 2007
* Author(s): Steve French (sfrench@us.ibm.com)
*
- * This library is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published
- * by the Free Software Foundation; either version 2.1 of the License, or
- * (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
- * the GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/fs.h>