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path: root/fs/cifs/smb2ops.c
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Diffstat (limited to 'fs/cifs/smb2ops.c')
-rw-r--r--fs/cifs/smb2ops.c611
1 files changed, 467 insertions, 144 deletions
diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
index 89985a0a6819..6f96e2292856 100644
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -34,6 +34,7 @@
#include "cifs_ioctl.h"
#include "smbdirect.h"
+/* Change credits for different ops and return the total number of credits */
static int
change_conf(struct TCP_Server_Info *server)
{
@@ -41,17 +42,15 @@ change_conf(struct TCP_Server_Info *server)
server->oplock_credits = server->echo_credits = 0;
switch (server->credits) {
case 0:
- return -1;
+ return 0;
case 1:
server->echoes = false;
server->oplocks = false;
- cifs_dbg(VFS, "disabling echoes and oplocks\n");
break;
case 2:
server->echoes = true;
server->oplocks = false;
server->echo_credits = 1;
- cifs_dbg(FYI, "disabling oplocks\n");
break;
default:
server->echoes = true;
@@ -64,16 +63,23 @@ change_conf(struct TCP_Server_Info *server)
server->echo_credits = 1;
}
server->credits -= server->echo_credits + server->oplock_credits;
- return 0;
+ return server->credits + server->echo_credits + server->oplock_credits;
}
static void
smb2_add_credits(struct TCP_Server_Info *server, const unsigned int add,
const int optype)
{
- int *val, rc = 0;
+ int *val, rc = -1;
+
spin_lock(&server->req_lock);
val = server->ops->get_credits_field(server, optype);
+
+ /* eg found case where write overlapping reconnect messed up credits */
+ if (((optype & CIFS_OP_MASK) == CIFS_NEG_OP) && (*val != 0))
+ trace_smb3_reconnect_with_invalid_credits(server->CurrentMid,
+ server->hostname, *val);
+
*val += add;
if (*val > 65000) {
*val = 65000; /* Don't get near 64K credits, avoid srv bugs */
@@ -95,8 +101,26 @@ smb2_add_credits(struct TCP_Server_Info *server, const unsigned int add,
}
spin_unlock(&server->req_lock);
wake_up(&server->request_q);
- if (rc)
- cifs_reconnect(server);
+
+ if (server->tcpStatus == CifsNeedReconnect)
+ return;
+
+ switch (rc) {
+ case -1:
+ /* change_conf hasn't been executed */
+ break;
+ case 0:
+ cifs_dbg(VFS, "Possible client or server bug - zero credits\n");
+ break;
+ case 1:
+ cifs_dbg(VFS, "disabling echoes and oplocks\n");
+ break;
+ case 2:
+ cifs_dbg(FYI, "disabling oplocks\n");
+ break;
+ default:
+ cifs_dbg(FYI, "add %u credits total=%d\n", add, rc);
+ }
}
static void
@@ -104,7 +128,12 @@ smb2_set_credits(struct TCP_Server_Info *server, const int val)
{
spin_lock(&server->req_lock);
server->credits = val;
+ if (val == 1)
+ server->reconnect_instance++;
spin_unlock(&server->req_lock);
+ /* don't log while holding the lock */
+ if (val == 1)
+ cifs_dbg(FYI, "set credits to 1 due to smb2 reconnect\n");
}
static int *
@@ -125,7 +154,11 @@ smb2_get_credits(struct mid_q_entry *mid)
{
struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)mid->resp_buf;
- return le16_to_cpu(shdr->CreditRequest);
+ if (mid->mid_state == MID_RESPONSE_RECEIVED
+ || mid->mid_state == MID_RESPONSE_MALFORMED)
+ return le16_to_cpu(shdr->CreditRequest);
+
+ return 0;
}
static int
@@ -154,14 +187,14 @@ smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
scredits = server->credits;
/* can deadlock with reopen */
- if (scredits == 1) {
+ if (scredits <= 8) {
*num = SMB2_MAX_BUFFER_SIZE;
*credits = 0;
break;
}
- /* leave one credit for a possible reopen */
- scredits--;
+ /* leave some credits for reopen and other ops */
+ scredits -= 8;
*num = min_t(unsigned int, size,
scredits * SMB2_MAX_BUFFER_SIZE);
@@ -270,6 +303,31 @@ smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
}
static unsigned int
+smb3_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
+{
+ struct TCP_Server_Info *server = tcon->ses->server;
+ unsigned int wsize;
+
+ /* start with specified wsize, or default */
+ wsize = volume_info->wsize ? volume_info->wsize : SMB3_DEFAULT_IOSIZE;
+ wsize = min_t(unsigned int, wsize, server->max_write);
+#ifdef CONFIG_CIFS_SMB_DIRECT
+ if (server->rdma) {
+ if (server->sign)
+ wsize = min_t(unsigned int,
+ wsize, server->smbd_conn->max_fragmented_send_size);
+ else
+ wsize = min_t(unsigned int,
+ wsize, server->smbd_conn->max_readwrite_size);
+ }
+#endif
+ if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
+ wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
+
+ return wsize;
+}
+
+static unsigned int
smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
{
struct TCP_Server_Info *server = tcon->ses->server;
@@ -295,6 +353,31 @@ smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
return rsize;
}
+static unsigned int
+smb3_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
+{
+ struct TCP_Server_Info *server = tcon->ses->server;
+ unsigned int rsize;
+
+ /* start with specified rsize, or default */
+ rsize = volume_info->rsize ? volume_info->rsize : SMB3_DEFAULT_IOSIZE;
+ rsize = min_t(unsigned int, rsize, server->max_read);
+#ifdef CONFIG_CIFS_SMB_DIRECT
+ if (server->rdma) {
+ if (server->sign)
+ rsize = min_t(unsigned int,
+ rsize, server->smbd_conn->max_fragmented_recv_size);
+ else
+ rsize = min_t(unsigned int,
+ rsize, server->smbd_conn->max_readwrite_size);
+ }
+#endif
+
+ if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
+ rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
+
+ return rsize;
+}
static int
parse_server_interfaces(struct network_interface_info_ioctl_rsp *buf,
@@ -686,6 +769,7 @@ move_smb2_ea_to_cifs(char *dst, size_t dst_size,
int rc = 0;
unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0;
char *name, *value;
+ size_t buf_size = dst_size;
size_t name_len, value_len, user_name_len;
while (src_size > 0) {
@@ -721,9 +805,10 @@ move_smb2_ea_to_cifs(char *dst, size_t dst_size,
/* 'user.' plus a terminating null */
user_name_len = 5 + 1 + name_len;
- rc += user_name_len;
-
- if (dst_size >= user_name_len) {
+ if (buf_size == 0) {
+ /* skip copy - calc size only */
+ rc += user_name_len;
+ } else if (dst_size >= user_name_len) {
dst_size -= user_name_len;
memcpy(dst, "user.", 5);
dst += 5;
@@ -731,8 +816,7 @@ move_smb2_ea_to_cifs(char *dst, size_t dst_size,
dst += name_len;
*dst = 0;
++dst;
- } else if (dst_size == 0) {
- /* skip copy - calc size only */
+ rc += user_name_len;
} else {
/* stop before overrun buffer */
rc = -ERANGE;
@@ -769,72 +853,50 @@ smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
{
int rc;
__le16 *utf16_path;
- __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
- struct cifs_open_parms oparms;
- struct cifs_fid fid;
- struct smb2_file_full_ea_info *smb2_data;
- int ea_buf_size = SMB2_MIN_EA_BUF;
+ struct kvec rsp_iov = {NULL, 0};
+ int buftype = CIFS_NO_BUFFER;
+ struct smb2_query_info_rsp *rsp;
+ struct smb2_file_full_ea_info *info = NULL;
utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
if (!utf16_path)
return -ENOMEM;
- oparms.tcon = tcon;
- oparms.desired_access = FILE_READ_EA;
- oparms.disposition = FILE_OPEN;
- if (backup_cred(cifs_sb))
- oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
- else
- oparms.create_options = 0;
- oparms.fid = &fid;
- oparms.reconnect = false;
-
- rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
- kfree(utf16_path);
+ rc = smb2_query_info_compound(xid, tcon, utf16_path,
+ FILE_READ_EA,
+ FILE_FULL_EA_INFORMATION,
+ SMB2_O_INFO_FILE,
+ CIFSMaxBufSize -
+ MAX_SMB2_CREATE_RESPONSE_SIZE -
+ MAX_SMB2_CLOSE_RESPONSE_SIZE,
+ &rsp_iov, &buftype, cifs_sb);
if (rc) {
- cifs_dbg(FYI, "open failed rc=%d\n", rc);
- return rc;
- }
-
- while (1) {
- smb2_data = kzalloc(ea_buf_size, GFP_KERNEL);
- if (smb2_data == NULL) {
- SMB2_close(xid, tcon, fid.persistent_fid,
- fid.volatile_fid);
- return -ENOMEM;
- }
-
- rc = SMB2_query_eas(xid, tcon, fid.persistent_fid,
- fid.volatile_fid,
- ea_buf_size, smb2_data);
-
- if (rc != -E2BIG)
- break;
-
- kfree(smb2_data);
- ea_buf_size <<= 1;
-
- if (ea_buf_size > SMB2_MAX_EA_BUF) {
- cifs_dbg(VFS, "EA size is too large\n");
- SMB2_close(xid, tcon, fid.persistent_fid,
- fid.volatile_fid);
- return -ENOMEM;
- }
+ /*
+ * If ea_name is NULL (listxattr) and there are no EAs,
+ * return 0 as it's not an error. Otherwise, the specified
+ * ea_name was not found.
+ */
+ if (!ea_name && rc == -ENODATA)
+ rc = 0;
+ goto qeas_exit;
}
- SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
+ rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
+ rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
+ le32_to_cpu(rsp->OutputBufferLength),
+ &rsp_iov,
+ sizeof(struct smb2_file_full_ea_info));
+ if (rc)
+ goto qeas_exit;
- /*
- * If ea_name is NULL (listxattr) and there are no EAs, return 0 as it's
- * not an error. Otherwise, the specified ea_name was not found.
- */
- if (!rc)
- rc = move_smb2_ea_to_cifs(ea_data, buf_size, smb2_data,
- SMB2_MAX_EA_BUF, ea_name);
- else if (!ea_name && rc == -ENODATA)
- rc = 0;
+ info = (struct smb2_file_full_ea_info *)(
+ le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
+ rc = move_smb2_ea_to_cifs(ea_data, buf_size, info,
+ le32_to_cpu(rsp->OutputBufferLength), ea_name);
- kfree(smb2_data);
+ qeas_exit:
+ kfree(utf16_path);
+ free_rsp_buf(buftype, rsp_iov.iov_base);
return rc;
}
@@ -845,14 +907,27 @@ smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
const __u16 ea_value_len, const struct nls_table *nls_codepage,
struct cifs_sb_info *cifs_sb)
{
- int rc;
- __le16 *utf16_path;
- __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
- struct cifs_open_parms oparms;
- struct cifs_fid fid;
- struct smb2_file_full_ea_info *ea;
+ struct cifs_ses *ses = tcon->ses;
+ __le16 *utf16_path = NULL;
int ea_name_len = strlen(ea_name);
+ int flags = 0;
int len;
+ struct smb_rqst rqst[3];
+ int resp_buftype[3];
+ struct kvec rsp_iov[3];
+ struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
+ struct cifs_open_parms oparms;
+ __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
+ struct cifs_fid fid;
+ struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE];
+ unsigned int size[1];
+ void *data[1];
+ struct smb2_file_full_ea_info *ea = NULL;
+ struct kvec close_iov[1];
+ int rc;
+
+ if (smb3_encryption_required(tcon))
+ flags |= CIFS_TRANSFORM_REQ;
if (ea_name_len > 255)
return -EINVAL;
@@ -861,6 +936,16 @@ smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
if (!utf16_path)
return -ENOMEM;
+ memset(rqst, 0, sizeof(rqst));
+ resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
+ memset(rsp_iov, 0, sizeof(rsp_iov));
+
+ /* Open */
+ memset(&open_iov, 0, sizeof(open_iov));
+ rqst[0].rq_iov = open_iov;
+ rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
+
+ memset(&oparms, 0, sizeof(oparms));
oparms.tcon = tcon;
oparms.desired_access = FILE_WRITE_EA;
oparms.disposition = FILE_OPEN;
@@ -871,18 +956,22 @@ smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
oparms.fid = &fid;
oparms.reconnect = false;
- rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
- kfree(utf16_path);
- if (rc) {
- cifs_dbg(FYI, "open failed rc=%d\n", rc);
- return rc;
- }
+ rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, utf16_path);
+ if (rc)
+ goto sea_exit;
+ smb2_set_next_command(tcon, &rqst[0]);
+
+
+ /* Set Info */
+ memset(&si_iov, 0, sizeof(si_iov));
+ rqst[1].rq_iov = si_iov;
+ rqst[1].rq_nvec = 1;
len = sizeof(ea) + ea_name_len + ea_value_len + 1;
ea = kzalloc(len, GFP_KERNEL);
if (ea == NULL) {
- SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
- return -ENOMEM;
+ rc = -ENOMEM;
+ goto sea_exit;
}
ea->ea_name_length = ea_name_len;
@@ -890,12 +979,36 @@ smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
memcpy(ea->ea_data, ea_name, ea_name_len + 1);
memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len);
- rc = SMB2_set_ea(xid, tcon, fid.persistent_fid, fid.volatile_fid, ea,
- len);
- kfree(ea);
+ size[0] = len;
+ data[0] = ea;
- SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
+ rc = SMB2_set_info_init(tcon, &rqst[1], COMPOUND_FID,
+ COMPOUND_FID, current->tgid,
+ FILE_FULL_EA_INFORMATION,
+ SMB2_O_INFO_FILE, 0, data, size);
+ smb2_set_next_command(tcon, &rqst[1]);
+ smb2_set_related(&rqst[1]);
+
+
+ /* Close */
+ memset(&close_iov, 0, sizeof(close_iov));
+ rqst[2].rq_iov = close_iov;
+ rqst[2].rq_nvec = 1;
+ rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID);
+ smb2_set_related(&rqst[2]);
+
+ rc = compound_send_recv(xid, ses, flags, 3, rqst,
+ resp_buftype, rsp_iov);
+ sea_exit:
+ kfree(ea);
+ kfree(utf16_path);
+ SMB2_open_free(&rqst[0]);
+ SMB2_set_info_free(&rqst[1]);
+ SMB2_close_free(&rqst[2]);
+ free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
+ free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
+ free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
return rc;
}
#endif
@@ -962,6 +1075,9 @@ smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
seq_printf(m, "\nBytes read: %llu Bytes written: %llu",
(long long)(tcon->bytes_read),
(long long)(tcon->bytes_written));
+ seq_printf(m, "\nOpen files: %d total (local), %d open on server",
+ atomic_read(&tcon->num_local_opens),
+ atomic_read(&tcon->num_remote_opens));
seq_printf(m, "\nTreeConnects: %d total %d failed",
atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
@@ -1014,6 +1130,9 @@ smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
cfile->fid.persistent_fid = fid->persistent_fid;
cfile->fid.volatile_fid = fid->volatile_fid;
+#ifdef CONFIG_CIFS_DEBUG2
+ cfile->fid.mid = fid->mid;
+#endif /* CIFS_DEBUG2 */
server->ops->set_oplock_level(cinode, oplock, fid->epoch,
&fid->purge_cache);
cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
@@ -1057,6 +1176,131 @@ req_res_key_exit:
return rc;
}
+static int
+smb2_ioctl_query_info(const unsigned int xid,
+ struct cifs_tcon *tcon,
+ __le16 *path, int is_dir,
+ unsigned long p)
+{
+ struct cifs_ses *ses = tcon->ses;
+ char __user *arg = (char __user *)p;
+ struct smb_query_info qi;
+ struct smb_query_info __user *pqi;
+ int rc = 0;
+ int flags = 0;
+ struct smb2_query_info_rsp *rsp = NULL;
+ void *buffer = NULL;
+ struct smb_rqst rqst[3];
+ int resp_buftype[3];
+ struct kvec rsp_iov[3];
+ struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
+ struct cifs_open_parms oparms;
+ u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
+ struct cifs_fid fid;
+ struct kvec qi_iov[1];
+ struct kvec close_iov[1];
+
+ memset(rqst, 0, sizeof(rqst));
+ resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
+ memset(rsp_iov, 0, sizeof(rsp_iov));
+
+ if (copy_from_user(&qi, arg, sizeof(struct smb_query_info)))
+ return -EFAULT;
+
+ if (qi.output_buffer_length > 1024)
+ return -EINVAL;
+
+ if (!ses || !(ses->server))
+ return -EIO;
+
+ if (smb3_encryption_required(tcon))
+ flags |= CIFS_TRANSFORM_REQ;
+
+ buffer = kmalloc(qi.output_buffer_length, GFP_KERNEL);
+ if (buffer == NULL)
+ return -ENOMEM;
+
+ if (copy_from_user(buffer, arg + sizeof(struct smb_query_info),
+ qi.output_buffer_length)) {
+ rc = -EFAULT;
+ goto iqinf_exit;
+ }
+
+ /* Open */
+ memset(&open_iov, 0, sizeof(open_iov));
+ rqst[0].rq_iov = open_iov;
+ rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
+
+ memset(&oparms, 0, sizeof(oparms));
+ oparms.tcon = tcon;
+ oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL;
+ oparms.disposition = FILE_OPEN;
+ if (is_dir)
+ oparms.create_options = CREATE_NOT_FILE;
+ else
+ oparms.create_options = CREATE_NOT_DIR;
+ oparms.fid = &fid;
+ oparms.reconnect = false;
+
+ rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, path);
+ if (rc)
+ goto iqinf_exit;
+ smb2_set_next_command(tcon, &rqst[0]);
+
+ /* Query */
+ memset(&qi_iov, 0, sizeof(qi_iov));
+ rqst[1].rq_iov = qi_iov;
+ rqst[1].rq_nvec = 1;
+
+ rc = SMB2_query_info_init(tcon, &rqst[1], COMPOUND_FID, COMPOUND_FID,
+ qi.file_info_class, qi.info_type,
+ qi.additional_information,
+ qi.input_buffer_length,
+ qi.output_buffer_length, buffer);
+ if (rc)
+ goto iqinf_exit;
+ smb2_set_next_command(tcon, &rqst[1]);
+ smb2_set_related(&rqst[1]);
+
+ /* Close */
+ memset(&close_iov, 0, sizeof(close_iov));
+ rqst[2].rq_iov = close_iov;
+ rqst[2].rq_nvec = 1;
+
+ rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID);
+ if (rc)
+ goto iqinf_exit;
+ smb2_set_related(&rqst[2]);
+
+ rc = compound_send_recv(xid, ses, flags, 3, rqst,
+ resp_buftype, rsp_iov);
+ if (rc)
+ goto iqinf_exit;
+ pqi = (struct smb_query_info __user *)arg;
+ rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
+ if (le32_to_cpu(rsp->OutputBufferLength) < qi.input_buffer_length)
+ qi.input_buffer_length = le32_to_cpu(rsp->OutputBufferLength);
+ if (copy_to_user(&pqi->input_buffer_length, &qi.input_buffer_length,
+ sizeof(qi.input_buffer_length))) {
+ rc = -EFAULT;
+ goto iqinf_exit;
+ }
+ if (copy_to_user(pqi + 1, rsp->Buffer, qi.input_buffer_length)) {
+ rc = -EFAULT;
+ goto iqinf_exit;
+ }
+
+ iqinf_exit:
+ kfree(buffer);
+ SMB2_open_free(&rqst[0]);
+ SMB2_query_info_free(&rqst[1]);
+ SMB2_close_free(&rqst[2]);
+ free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
+ free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
+ free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
+ return rc;
+}
+
static ssize_t
smb2_copychunk_range(const unsigned int xid,
struct cifsFileInfo *srcfile,
@@ -1301,7 +1545,7 @@ smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
}
return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
- cfile->fid.volatile_fid, cfile->pid, &eof, false);
+ cfile->fid.volatile_fid, cfile->pid, &eof);
}
static int
@@ -1556,7 +1800,7 @@ smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
CIFS_CACHE_READ(cinode) ? 1 : 0);
}
-static void
+void
smb2_set_related(struct smb_rqst *rqst)
{
struct smb2_sync_hdr *shdr;
@@ -1567,50 +1811,87 @@ smb2_set_related(struct smb_rqst *rqst)
char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0};
-static void
-smb2_set_next_command(struct TCP_Server_Info *server, struct smb_rqst *rqst)
+void
+smb2_set_next_command(struct cifs_tcon *tcon, struct smb_rqst *rqst)
{
struct smb2_sync_hdr *shdr;
+ struct cifs_ses *ses = tcon->ses;
+ struct TCP_Server_Info *server = ses->server;
unsigned long len = smb_rqst_len(server, rqst);
+ int i, num_padding;
/* SMB headers in a compound are 8 byte aligned. */
- if (len & 7) {
+
+ /* No padding needed */
+ if (!(len & 7))
+ goto finished;
+
+ num_padding = 8 - (len & 7);
+ if (!smb3_encryption_required(tcon)) {
+ /*
+ * If we do not have encryption then we can just add an extra
+ * iov for the padding.
+ */
rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding;
- rqst->rq_iov[rqst->rq_nvec].iov_len = 8 - (len & 7);
+ rqst->rq_iov[rqst->rq_nvec].iov_len = num_padding;
rqst->rq_nvec++;
- len = smb_rqst_len(server, rqst);
+ len += num_padding;
+ } else {
+ /*
+ * We can not add a small padding iov for the encryption case
+ * because the encryption framework can not handle the padding
+ * iovs.
+ * We have to flatten this into a single buffer and add
+ * the padding to it.
+ */
+ for (i = 1; i < rqst->rq_nvec; i++) {
+ memcpy(rqst->rq_iov[0].iov_base +
+ rqst->rq_iov[0].iov_len,
+ rqst->rq_iov[i].iov_base,
+ rqst->rq_iov[i].iov_len);
+ rqst->rq_iov[0].iov_len += rqst->rq_iov[i].iov_len;
+ }
+ memset(rqst->rq_iov[0].iov_base + rqst->rq_iov[0].iov_len,
+ 0, num_padding);
+ rqst->rq_iov[0].iov_len += num_padding;
+ len += num_padding;
+ rqst->rq_nvec = 1;
}
+ finished:
shdr = (struct smb2_sync_hdr *)(rqst->rq_iov[0].iov_base);
shdr->NextCommand = cpu_to_le32(len);
}
-static int
-smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
- struct kstatfs *buf)
+/*
+ * Passes the query info response back to the caller on success.
+ * Caller need to free this with free_rsp_buf().
+ */
+int
+smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon,
+ __le16 *utf16_path, u32 desired_access,
+ u32 class, u32 type, u32 output_len,
+ struct kvec *rsp, int *buftype,
+ struct cifs_sb_info *cifs_sb)
{
- struct smb2_query_info_rsp *rsp;
- struct smb2_fs_full_size_info *info = NULL;
+ struct cifs_ses *ses = tcon->ses;
+ int flags = 0;
struct smb_rqst rqst[3];
int resp_buftype[3];
struct kvec rsp_iov[3];
struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
struct kvec qi_iov[1];
struct kvec close_iov[1];
- struct cifs_ses *ses = tcon->ses;
- struct TCP_Server_Info *server = ses->server;
- __le16 srch_path = 0; /* Null - open root of share */
u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
struct cifs_open_parms oparms;
struct cifs_fid fid;
- int flags = 0;
int rc;
if (smb3_encryption_required(tcon))
flags |= CIFS_TRANSFORM_REQ;
memset(rqst, 0, sizeof(rqst));
- memset(resp_buftype, 0, sizeof(resp_buftype));
+ resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
memset(rsp_iov, 0, sizeof(rsp_iov));
memset(&open_iov, 0, sizeof(open_iov));
@@ -1618,28 +1899,31 @@ smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
oparms.tcon = tcon;
- oparms.desired_access = FILE_READ_ATTRIBUTES;
+ oparms.desired_access = desired_access;
oparms.disposition = FILE_OPEN;
- oparms.create_options = 0;
+ if (cifs_sb && backup_cred(cifs_sb))
+ oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
+ else
+ oparms.create_options = 0;
oparms.fid = &fid;
oparms.reconnect = false;
- rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, &srch_path);
+ rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, utf16_path);
if (rc)
- goto qfs_exit;
- smb2_set_next_command(server, &rqst[0]);
+ goto qic_exit;
+ smb2_set_next_command(tcon, &rqst[0]);
memset(&qi_iov, 0, sizeof(qi_iov));
rqst[1].rq_iov = qi_iov;
rqst[1].rq_nvec = 1;
rc = SMB2_query_info_init(tcon, &rqst[1], COMPOUND_FID, COMPOUND_FID,
- FS_FULL_SIZE_INFORMATION,
- SMB2_O_INFO_FILESYSTEM, 0,
- sizeof(struct smb2_fs_full_size_info));
+ class, type, 0,
+ output_len, 0,
+ NULL);
if (rc)
- goto qfs_exit;
- smb2_set_next_command(server, &rqst[1]);
+ goto qic_exit;
+ smb2_set_next_command(tcon, &rqst[1]);
smb2_set_related(&rqst[1]);
memset(&close_iov, 0, sizeof(close_iov));
@@ -1648,32 +1932,61 @@ smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID);
if (rc)
- goto qfs_exit;
+ goto qic_exit;
smb2_set_related(&rqst[2]);
rc = compound_send_recv(xid, ses, flags, 3, rqst,
resp_buftype, rsp_iov);
+ if (rc) {
+ free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
+ goto qic_exit;
+ }
+ *rsp = rsp_iov[1];
+ *buftype = resp_buftype[1];
+
+ qic_exit:
+ SMB2_open_free(&rqst[0]);
+ SMB2_query_info_free(&rqst[1]);
+ SMB2_close_free(&rqst[2]);
+ free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
+ free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
+ return rc;
+}
+
+static int
+smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
+ struct kstatfs *buf)
+{
+ struct smb2_query_info_rsp *rsp;
+ struct smb2_fs_full_size_info *info = NULL;
+ __le16 utf16_path = 0; /* Null - open root of share */
+ struct kvec rsp_iov = {NULL, 0};
+ int buftype = CIFS_NO_BUFFER;
+ int rc;
+
+
+ rc = smb2_query_info_compound(xid, tcon, &utf16_path,
+ FILE_READ_ATTRIBUTES,
+ FS_FULL_SIZE_INFORMATION,
+ SMB2_O_INFO_FILESYSTEM,
+ sizeof(struct smb2_fs_full_size_info),
+ &rsp_iov, &buftype, NULL);
if (rc)
goto qfs_exit;
- rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
+ rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
buf->f_type = SMB2_MAGIC_NUMBER;
info = (struct smb2_fs_full_size_info *)(
le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
le32_to_cpu(rsp->OutputBufferLength),
- &rsp_iov[1],
+ &rsp_iov,
sizeof(struct smb2_fs_full_size_info));
if (!rc)
smb2_copy_fs_info_to_kstatfs(info, buf);
qfs_exit:
- SMB2_open_free(&rqst[0]);
- SMB2_query_info_free(&rqst[1]);
- SMB2_close_free(&rqst[2]);
- free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
- free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
- free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
+ free_rsp_buf(buftype, rsp_iov.iov_base);
return rc;
}
@@ -2542,7 +2855,7 @@ init_sg(int num_rqst, struct smb_rqst *rqst, u8 *sign)
smb2_sg_set_buf(&sg[idx++],
rqst[i].rq_iov[j].iov_base + skip,
rqst[i].rq_iov[j].iov_len - skip);
- }
+ }
for (j = 0; j < rqst[i].rq_npages; j++) {
unsigned int len, offset;
@@ -2900,11 +3213,23 @@ handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
server->ops->is_status_pending(buf, server, 0))
return -1;
- rdata->result = server->ops->map_error(buf, false);
+ /* set up first two iov to get credits */
+ rdata->iov[0].iov_base = buf;
+ rdata->iov[0].iov_len = 4;
+ rdata->iov[1].iov_base = buf + 4;
+ rdata->iov[1].iov_len =
+ min_t(unsigned int, buf_len, server->vals->read_rsp_size) - 4;
+ cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
+ rdata->iov[0].iov_base, rdata->iov[0].iov_len);
+ cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n",
+ rdata->iov[1].iov_base, rdata->iov[1].iov_len);
+
+ rdata->result = server->ops->map_error(buf, true);
if (rdata->result != 0) {
cifs_dbg(FYI, "%s: server returned error %d\n",
__func__, rdata->result);
- dequeue_mid(mid, rdata->result);
+ /* normal error on read response */
+ dequeue_mid(mid, false);
return 0;
}
@@ -2962,13 +3287,13 @@ handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
return 0;
}
- iov_iter_bvec(&iter, WRITE | ITER_BVEC, bvec, npages, data_len);
+ iov_iter_bvec(&iter, WRITE, bvec, npages, data_len);
} else if (buf_len >= data_offset + data_len) {
/* read response payload is in buf */
WARN_ONCE(npages > 0, "read data can be either in buf or in pages");
iov.iov_base = buf + data_offset;
iov.iov_len = data_len;
- iov_iter_kvec(&iter, WRITE | ITER_KVEC, &iov, 1, data_len);
+ iov_iter_kvec(&iter, WRITE, &iov, 1, data_len);
} else {
/* read response payload cannot be in both buf and pages */
WARN_ONCE(1, "buf can not contain only a part of read data");
@@ -2977,14 +3302,6 @@ handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
return 0;
}
- /* set up first iov for signature check */
- rdata->iov[0].iov_base = buf;
- rdata->iov[0].iov_len = 4;
- rdata->iov[1].iov_base = buf + 4;
- rdata->iov[1].iov_len = server->vals->read_rsp_size - 4;
- cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
- rdata->iov[0].iov_base, server->vals->read_rsp_size);
-
length = rdata->copy_into_pages(server, rdata, &iter);
kfree(bvec);
@@ -3183,8 +3500,10 @@ smb3_receive_transform(struct TCP_Server_Info *server,
}
/* TODO: add support for compounds containing READ. */
- if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server))
+ if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) {
+ *num_mids = 1;
return receive_encrypted_read(server, &mids[0]);
+ }
return receive_encrypted_standard(server, mids, bufs, num_mids);
}
@@ -3303,6 +3622,7 @@ struct smb_version_operations smb20_operations = {
.set_acl = set_smb2_acl,
#endif /* CIFS_ACL */
.next_header = smb2_next_header,
+ .ioctl_query_info = smb2_ioctl_query_info,
};
struct smb_version_operations smb21_operations = {
@@ -3398,6 +3718,7 @@ struct smb_version_operations smb21_operations = {
.set_acl = set_smb2_acl,
#endif /* CIFS_ACL */
.next_header = smb2_next_header,
+ .ioctl_query_info = smb2_ioctl_query_info,
};
struct smb_version_operations smb30_operations = {
@@ -3425,8 +3746,8 @@ struct smb_version_operations smb30_operations = {
.downgrade_oplock = smb2_downgrade_oplock,
.need_neg = smb2_need_neg,
.negotiate = smb2_negotiate,
- .negotiate_wsize = smb2_negotiate_wsize,
- .negotiate_rsize = smb2_negotiate_rsize,
+ .negotiate_wsize = smb3_negotiate_wsize,
+ .negotiate_rsize = smb3_negotiate_rsize,
.sess_setup = SMB2_sess_setup,
.logoff = SMB2_logoff,
.tree_connect = SMB2_tcon,
@@ -3502,6 +3823,7 @@ struct smb_version_operations smb30_operations = {
.set_acl = set_smb2_acl,
#endif /* CIFS_ACL */
.next_header = smb2_next_header,
+ .ioctl_query_info = smb2_ioctl_query_info,
};
struct smb_version_operations smb311_operations = {
@@ -3529,8 +3851,8 @@ struct smb_version_operations smb311_operations = {
.downgrade_oplock = smb2_downgrade_oplock,
.need_neg = smb2_need_neg,
.negotiate = smb2_negotiate,
- .negotiate_wsize = smb2_negotiate_wsize,
- .negotiate_rsize = smb2_negotiate_rsize,
+ .negotiate_wsize = smb3_negotiate_wsize,
+ .negotiate_rsize = smb3_negotiate_rsize,
.sess_setup = SMB2_sess_setup,
.logoff = SMB2_logoff,
.tree_connect = SMB2_tcon,
@@ -3607,6 +3929,7 @@ struct smb_version_operations smb311_operations = {
.set_acl = set_smb2_acl,
#endif /* CIFS_ACL */
.next_header = smb2_next_header,
+ .ioctl_query_info = smb2_ioctl_query_info,
};
struct smb_version_values smb20_values = {
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