CIFS: use tcon_ipc instead of use_ipc parameter of SMB2_ioctl

Since IPC now has a tcon object, the caller can just pass it. This
allows domain-based DFS requests to work with smb2+.

Link: https://bugzilla.samba.org/show_bug.cgi?id=12917
Fixes: 9d49640a21bf ("CIFS: implement get_dfs_refer for SMB2+")
Signed-off-by: Aurelien Aptel <aaptel@suse.com>
Signed-off-by: Steve French <smfrench@gmail.com>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>

diff --git a/fs/cifs/smb2file.c b/fs/cifs/smb2file.c
index b4b1f03..12af5db 100644 (file)
--- a/fs/cifs/smb2file.c
+++ b/fs/cifs/smb2file.c
@@ -74,7 +74,7 @@ smb2_open_file(const unsigned int xid, struct cifs_open_parms *oparms,
                nr_ioctl_req.Reserved = 0;
                rc = SMB2_ioctl(xid, oparms->tcon, fid->persistent_fid,
                        fid->volatile_fid, FSCTL_LMR_REQUEST_RESILIENCY,
-                       true /* is_fsctl */, false /* use_ipc */,
+                       true /* is_fsctl */,
                        (char *)&nr_ioctl_req, sizeof(nr_ioctl_req),
                        NULL, NULL /* no return info */);
                if (rc == -EOPNOTSUPP) {

diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
index e3393ff..eb68e2f 100644 (file)
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -293,7 +293,6 @@ SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon)
 
        rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
                        FSCTL_QUERY_NETWORK_INTERFACE_INFO, true /* is_fsctl */,
-                       false /* use_ipc */,
                        NULL /* no data input */, 0 /* no data input */,
                        (char **)&out_buf, &ret_data_len);
        if (rc != 0)
@@ -792,7 +791,6 @@ SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
 
        rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
                        FSCTL_SRV_REQUEST_RESUME_KEY, true /* is_fsctl */,
-                       false /* use_ipc */,
                        NULL, 0 /* no input */,
                        (char **)&res_key, &ret_data_len);
 
@@ -858,8 +856,7 @@ smb2_copychunk_range(const unsigned int xid,
                /* Request server copy to target from src identified by key */
                rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
                        trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
-                       true /* is_fsctl */, false /* use_ipc */,
-                       (char *)pcchunk,
+                       true /* is_fsctl */, (char *)pcchunk,
                        sizeof(struct copychunk_ioctl), (char **)&retbuf,
                        &ret_data_len);
                if (rc == 0) {
@@ -1020,7 +1017,7 @@ static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
 
        rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
                        cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
-                       true /* is_fctl */, false /* use_ipc */,
+                       true /* is_fctl */,
                        &setsparse, 1, NULL, NULL);
        if (rc) {
                tcon->broken_sparse_sup = true;
@@ -1091,7 +1088,7 @@ smb2_duplicate_extents(const unsigned int xid,
        rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
                        trgtfile->fid.volatile_fid,
                        FSCTL_DUPLICATE_EXTENTS_TO_FILE,
-                       true /* is_fsctl */, false /* use_ipc */,
+                       true /* is_fsctl */,
                        (char *)&dup_ext_buf,
                        sizeof(struct duplicate_extents_to_file),
                        NULL,
@@ -1126,7 +1123,7 @@ smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
        return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
                        cfile->fid.volatile_fid,
                        FSCTL_SET_INTEGRITY_INFORMATION,
-                       true /* is_fsctl */, false /* use_ipc */,
+                       true /* is_fsctl */,
                        (char *)&integr_info,
                        sizeof(struct fsctl_set_integrity_information_req),
                        NULL,
@@ -1146,7 +1143,7 @@ smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
        rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
                        cfile->fid.volatile_fid,
                        FSCTL_SRV_ENUMERATE_SNAPSHOTS,
-                       true /* is_fsctl */, false /* use_ipc */,
+                       true /* is_fsctl */,
                        NULL, 0 /* no input data */,
                        (char **)&retbuf,
                        &ret_data_len);
@@ -1365,16 +1362,20 @@ smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
        cifs_dbg(FYI, "smb2_get_dfs_refer path <%s>\n", search_name);
 
        /*
-        * Use any tcon from the current session. Here, the first one.
+        * Try to use the IPC tcon, otherwise just use any
         */
-       spin_lock(&cifs_tcp_ses_lock);
-       tcon = list_first_entry_or_null(&ses->tcon_list, struct cifs_tcon,
-                                       tcon_list);
-       if (tcon)
-               tcon->tc_count++;
-       spin_unlock(&cifs_tcp_ses_lock);
+       tcon = ses->tcon_ipc;
+       if (tcon == NULL) {
+               spin_lock(&cifs_tcp_ses_lock);
+               tcon = list_first_entry_or_null(&ses->tcon_list,
+                                               struct cifs_tcon,
+                                               tcon_list);
+               if (tcon)
+                       tcon->tc_count++;
+               spin_unlock(&cifs_tcp_ses_lock);
+       }
 
-       if (!tcon) {
+       if (tcon == NULL) {
                cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n",
                         ses);
                rc = -ENOTCONN;
@@ -1403,20 +1404,11 @@ smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
        memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len);
 
        do {
-               /* try first with IPC */
                rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
                                FSCTL_DFS_GET_REFERRALS,
-                               true /* is_fsctl */, true /* use_ipc */,
+                               true /* is_fsctl */,
                                (char *)dfs_req, dfs_req_size,
                                (char **)&dfs_rsp, &dfs_rsp_size);
-               if (rc == -ENOTCONN) {
-                       /* try with normal tcon */
-                       rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
-                                       FSCTL_DFS_GET_REFERRALS,
-                                       true /* is_fsctl */, false /*use_ipc*/,
-                                       (char *)dfs_req, dfs_req_size,
-                                       (char **)&dfs_rsp, &dfs_rsp_size);
-               }
        } while (rc == -EAGAIN);
 
        if (rc) {
@@ -1435,7 +1427,8 @@ smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
        }
 
  out:
-       if (tcon) {
+       if (tcon && !tcon->ipc) {
+               /* ipc tcons are not refcounted */
                spin_lock(&cifs_tcp_ses_lock);
                tcon->tc_count--;
                spin_unlock(&cifs_tcp_ses_lock);
@@ -1727,8 +1720,7 @@ static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
 
        rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
                        cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
-                       true /* is_fctl */, false /* use_ipc */,
-                       (char *)&fsctl_buf,
+                       true /* is_fctl */, (char *)&fsctl_buf,
                        sizeof(struct file_zero_data_information), NULL, NULL);
        free_xid(xid);
        return rc;
@@ -1762,8 +1754,7 @@ static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
 
        rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
                        cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
-                       true /* is_fctl */, false /* use_ipc */,
-                       (char *)&fsctl_buf,
+                       true /* is_fctl */, (char *)&fsctl_buf,
                        sizeof(struct file_zero_data_information), NULL, NULL);
        free_xid(xid);
        return rc;

diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c
index 2943adc..17b7f3a 100644 (file)
--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -680,7 +680,6 @@ int smb3_validate_negotiate(const unsigned int xid, struct cifs_tcon *tcon)
 
        rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
                FSCTL_VALIDATE_NEGOTIATE_INFO, true /* is_fsctl */,
-               false /* use_ipc */,
                (char *)&vneg_inbuf, sizeof(struct validate_negotiate_info_req),
                (char **)&pneg_rsp, &rsplen);
 
@@ -1841,7 +1840,7 @@ creat_exit:
  */
 int
 SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
-          u64 volatile_fid, u32 opcode, bool is_fsctl, bool use_ipc,
+          u64 volatile_fid, u32 opcode, bool is_fsctl,
           char *in_data, u32 indatalen,
           char **out_data, u32 *plen /* returned data len */)
 {
@@ -2006,7 +2005,6 @@ SMB2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
 
        rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
                        FSCTL_SET_COMPRESSION, true /* is_fsctl */,
-                       false /* use_ipc */,
                        (char *)&fsctl_input /* data input */,
                        2 /* in data len */, &ret_data /* out data */, NULL);
 

diff --git a/fs/cifs/smb2proto.h b/fs/cifs/smb2proto.h
index e9ab522..05287b0 100644 (file)
--- a/fs/cifs/smb2proto.h
+++ b/fs/cifs/smb2proto.h
@@ -125,8 +125,7 @@ extern int SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms,
                     struct smb2_err_rsp **err_buf);
 extern int SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon,
                     u64 persistent_fid, u64 volatile_fid, u32 opcode,
-                    bool is_fsctl, bool use_ipc,
-                    char *in_data, u32 indatalen,
+                    bool is_fsctl, char *in_data, u32 indatalen,
                     char **out_data, u32 *plen /* returned data len */);
 extern int SMB2_close(const unsigned int xid, struct cifs_tcon *tcon,
                      u64 persistent_file_id, u64 volatile_file_id);