2011-12-29 21:06:33 +08:00
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/*
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* fs/cifs/smb2inode.c
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*
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* Copyright (C) International Business Machines Corp., 2002, 2011
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* Etersoft, 2012
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* Author(s): Pavel Shilovsky (pshilovsky@samba.org),
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* Steve French (sfrench@us.ibm.com)
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*
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* This library is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published
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* by the Free Software Foundation; either version 2.1 of the License, or
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* (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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* the GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/fs.h>
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#include <linux/stat.h>
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#include <linux/slab.h>
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#include <linux/pagemap.h>
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#include <asm/div64.h>
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#include "cifsfs.h"
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#include "cifspdu.h"
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#include "cifsglob.h"
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#include "cifsproto.h"
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#include "cifs_debug.h"
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#include "cifs_fs_sb.h"
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#include "cifs_unicode.h"
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#include "fscache.h"
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#include "smb2glob.h"
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#include "smb2pdu.h"
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#include "smb2proto.h"
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2019-03-13 13:02:47 +08:00
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static void
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free_set_inf_compound(struct smb_rqst *rqst)
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{
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if (rqst[1].rq_iov)
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SMB2_set_info_free(&rqst[1]);
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if (rqst[2].rq_iov)
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SMB2_close_free(&rqst[2]);
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}
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2020-05-20 10:19:59 +08:00
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struct cop_vars {
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struct cifs_open_parms oparms;
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struct kvec rsp_iov[3];
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struct smb_rqst rqst[3];
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struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
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struct kvec qi_iov[1];
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struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE];
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struct kvec close_iov[1];
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struct smb2_file_rename_info rename_info;
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struct smb2_file_link_info link_info;
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};
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2018-09-03 11:33:41 +08:00
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static int
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smb2_compound_op(const unsigned int xid, struct cifs_tcon *tcon,
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struct cifs_sb_info *cifs_sb, const char *full_path,
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__u32 desired_access, __u32 create_disposition,
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2019-09-25 13:32:13 +08:00
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__u32 create_options, umode_t mode, void *ptr, int command,
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2019-08-30 06:25:46 +08:00
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struct cifsFileInfo *cfile)
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2018-09-03 11:33:41 +08:00
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{
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2020-05-20 10:19:59 +08:00
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struct cop_vars *vars = NULL;
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struct kvec *rsp_iov;
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struct smb_rqst *rqst;
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2018-09-03 11:33:41 +08:00
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int rc;
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__le16 *utf16_path = NULL;
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__u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
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struct cifs_fid fid;
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struct cifs_ses *ses = tcon->ses;
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2020-06-01 01:38:22 +08:00
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struct TCP_Server_Info *server;
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2018-09-03 11:33:41 +08:00
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int num_rqst = 0;
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int resp_buftype[3];
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2018-09-03 11:33:45 +08:00
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struct smb2_query_info_rsp *qi_rsp = NULL;
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2018-09-03 11:33:41 +08:00
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int flags = 0;
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2018-09-03 11:33:45 +08:00
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__u8 delete_pending[8] = {1, 0, 0, 0, 0, 0, 0, 0};
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2018-09-03 11:33:49 +08:00
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unsigned int size[2];
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void *data[2];
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int len;
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2018-09-03 11:33:41 +08:00
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2020-05-20 10:19:59 +08:00
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vars = kzalloc(sizeof(*vars), GFP_ATOMIC);
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if (vars == NULL)
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return -ENOMEM;
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rqst = &vars->rqst[0];
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rsp_iov = &vars->rsp_iov[0];
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2020-06-01 01:38:22 +08:00
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server = cifs_pick_channel(ses);
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2018-09-03 11:33:41 +08:00
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if (smb3_encryption_required(tcon))
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flags |= CIFS_TRANSFORM_REQ;
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resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
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2019-08-30 06:25:46 +08:00
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/* We already have a handle so we can skip the open */
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if (cfile)
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goto after_open;
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2018-09-03 11:33:41 +08:00
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/* Open */
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utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
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2019-08-30 06:25:46 +08:00
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if (!utf16_path) {
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rc = -ENOMEM;
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goto finished;
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}
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2018-09-03 11:33:41 +08:00
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2020-05-20 10:19:59 +08:00
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vars->oparms.tcon = tcon;
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vars->oparms.desired_access = desired_access;
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vars->oparms.disposition = create_disposition;
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vars->oparms.create_options = cifs_create_options(cifs_sb, create_options);
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vars->oparms.fid = &fid;
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vars->oparms.reconnect = false;
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vars->oparms.mode = mode;
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2020-08-14 01:38:08 +08:00
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vars->oparms.cifs_sb = cifs_sb;
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2020-05-20 10:19:59 +08:00
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rqst[num_rqst].rq_iov = &vars->open_iov[0];
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2018-09-03 11:33:41 +08:00
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rqst[num_rqst].rq_nvec = SMB2_CREATE_IOV_SIZE;
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2020-06-01 01:38:22 +08:00
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rc = SMB2_open_init(tcon, server,
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&rqst[num_rqst], &oplock, &vars->oparms,
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2018-09-03 11:33:41 +08:00
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utf16_path);
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kfree(utf16_path);
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if (rc)
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goto finished;
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2019-08-30 06:25:46 +08:00
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smb2_set_next_command(tcon, &rqst[num_rqst]);
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after_open:
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num_rqst++;
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rc = 0;
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2018-09-03 11:33:41 +08:00
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/* Operation */
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switch (command) {
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case SMB2_OP_QUERY_INFO:
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2020-05-20 10:19:59 +08:00
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rqst[num_rqst].rq_iov = &vars->qi_iov[0];
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2018-09-03 11:33:41 +08:00
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rqst[num_rqst].rq_nvec = 1;
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2019-09-09 13:30:00 +08:00
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if (cfile)
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2020-06-01 01:38:22 +08:00
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rc = SMB2_query_info_init(tcon, server,
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&rqst[num_rqst],
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2019-09-09 13:30:00 +08:00
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cfile->fid.persistent_fid,
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cfile->fid.volatile_fid,
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FILE_ALL_INFORMATION,
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2018-09-03 11:33:41 +08:00
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SMB2_O_INFO_FILE, 0,
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sizeof(struct smb2_file_all_info) +
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2018-10-08 08:19:58 +08:00
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PATH_MAX * 2, 0, NULL);
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2019-09-09 13:30:00 +08:00
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else {
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2020-06-01 01:38:22 +08:00
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rc = SMB2_query_info_init(tcon, server,
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&rqst[num_rqst],
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2019-09-09 13:30:00 +08:00
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COMPOUND_FID,
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COMPOUND_FID,
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2020-06-01 01:38:22 +08:00
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FILE_ALL_INFORMATION,
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2019-09-09 13:30:00 +08:00
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SMB2_O_INFO_FILE, 0,
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sizeof(struct smb2_file_all_info) +
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PATH_MAX * 2, 0, NULL);
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if (!rc) {
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smb2_set_next_command(tcon, &rqst[num_rqst]);
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smb2_set_related(&rqst[num_rqst]);
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}
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}
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2020-06-12 08:25:47 +08:00
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if (rc)
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goto finished;
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num_rqst++;
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trace_smb3_query_info_compound_enter(xid, ses->Suid, tcon->tid,
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full_path);
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break;
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case SMB2_OP_POSIX_QUERY_INFO:
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rqst[num_rqst].rq_iov = &vars->qi_iov[0];
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rqst[num_rqst].rq_nvec = 1;
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if (cfile)
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rc = SMB2_query_info_init(tcon, server,
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&rqst[num_rqst],
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cfile->fid.persistent_fid,
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cfile->fid.volatile_fid,
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SMB_FIND_FILE_POSIX_INFO,
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SMB2_O_INFO_FILE, 0,
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/* TBD: fix following to allow for longer SIDs */
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sizeof(struct smb311_posix_qinfo *) + (PATH_MAX * 2) +
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(sizeof(struct cifs_sid) * 2), 0, NULL);
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else {
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rc = SMB2_query_info_init(tcon, server,
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&rqst[num_rqst],
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COMPOUND_FID,
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COMPOUND_FID,
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SMB_FIND_FILE_POSIX_INFO,
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SMB2_O_INFO_FILE, 0,
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sizeof(struct smb311_posix_qinfo *) + (PATH_MAX * 2) +
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(sizeof(struct cifs_sid) * 2), 0, NULL);
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if (!rc) {
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smb2_set_next_command(tcon, &rqst[num_rqst]);
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smb2_set_related(&rqst[num_rqst]);
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}
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}
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2019-07-16 08:41:46 +08:00
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if (rc)
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goto finished;
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2019-09-09 13:30:00 +08:00
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num_rqst++;
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2020-06-12 12:02:33 +08:00
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trace_smb3_posix_query_info_compound_enter(xid, ses->Suid, tcon->tid, full_path);
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2018-09-03 11:33:41 +08:00
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break;
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2018-09-03 11:33:43 +08:00
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case SMB2_OP_DELETE:
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2019-03-13 13:02:47 +08:00
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trace_smb3_delete_enter(xid, ses->Suid, tcon->tid, full_path);
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2018-09-03 11:33:43 +08:00
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break;
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2018-09-03 11:33:42 +08:00
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case SMB2_OP_MKDIR:
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/*
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* Directories are created through parameters in the
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* SMB2_open() call.
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*/
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2019-03-13 13:02:47 +08:00
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trace_smb3_mkdir_enter(xid, ses->Suid, tcon->tid, full_path);
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2018-09-03 11:33:42 +08:00
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break;
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2018-09-03 11:33:45 +08:00
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case SMB2_OP_RMDIR:
|
2020-05-20 10:19:59 +08:00
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rqst[num_rqst].rq_iov = &vars->si_iov[0];
|
2018-09-03 11:33:45 +08:00
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rqst[num_rqst].rq_nvec = 1;
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|
2018-12-19 07:49:05 +08:00
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size[0] = 1; /* sizeof __u8 See MS-FSCC section 2.4.11 */
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2018-09-03 11:33:45 +08:00
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data[0] = &delete_pending[0];
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|
|
2020-06-01 01:38:22 +08:00
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rc = SMB2_set_info_init(tcon, server,
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&rqst[num_rqst], COMPOUND_FID,
|
2018-09-03 11:33:45 +08:00
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COMPOUND_FID, current->tgid,
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FILE_DISPOSITION_INFORMATION,
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SMB2_O_INFO_FILE, 0, data, size);
|
2019-07-16 08:41:46 +08:00
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if (rc)
|
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goto finished;
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2018-12-31 11:43:40 +08:00
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smb2_set_next_command(tcon, &rqst[num_rqst]);
|
2018-09-03 11:33:45 +08:00
|
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smb2_set_related(&rqst[num_rqst++]);
|
2019-03-13 13:02:47 +08:00
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trace_smb3_rmdir_enter(xid, ses->Suid, tcon->tid, full_path);
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2018-09-03 11:33:45 +08:00
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break;
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2018-09-03 11:33:46 +08:00
|
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case SMB2_OP_SET_EOF:
|
2020-05-20 10:19:59 +08:00
|
|
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rqst[num_rqst].rq_iov = &vars->si_iov[0];
|
2018-09-03 11:33:46 +08:00
|
|
|
rqst[num_rqst].rq_nvec = 1;
|
|
|
|
|
|
|
|
|
|
size[0] = 8; /* sizeof __le64 */
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|
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|
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data[0] = ptr;
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|
|
|
|
|
2020-06-01 01:38:22 +08:00
|
|
|
rc = SMB2_set_info_init(tcon, server,
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|
|
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&rqst[num_rqst], COMPOUND_FID,
|
2018-09-03 11:33:46 +08:00
|
|
|
COMPOUND_FID, current->tgid,
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|
|
|
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FILE_END_OF_FILE_INFORMATION,
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|
|
|
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SMB2_O_INFO_FILE, 0, data, size);
|
2019-07-16 08:41:46 +08:00
|
|
|
if (rc)
|
|
|
|
|
goto finished;
|
2018-12-31 11:43:40 +08:00
|
|
|
smb2_set_next_command(tcon, &rqst[num_rqst]);
|
2018-09-03 11:33:46 +08:00
|
|
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smb2_set_related(&rqst[num_rqst++]);
|
2019-03-13 13:02:47 +08:00
|
|
|
trace_smb3_set_eof_enter(xid, ses->Suid, tcon->tid, full_path);
|
2018-09-03 11:33:46 +08:00
|
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break;
|
2018-09-03 11:33:48 +08:00
|
|
|
case SMB2_OP_SET_INFO:
|
2020-05-20 10:19:59 +08:00
|
|
|
rqst[num_rqst].rq_iov = &vars->si_iov[0];
|
2018-09-03 11:33:48 +08:00
|
|
|
rqst[num_rqst].rq_nvec = 1;
|
|
|
|
|
|
2018-09-03 11:33:49 +08:00
|
|
|
|
2018-09-03 11:33:48 +08:00
|
|
|
size[0] = sizeof(FILE_BASIC_INFO);
|
|
|
|
|
data[0] = ptr;
|
|
|
|
|
|
2019-08-30 07:53:56 +08:00
|
|
|
if (cfile)
|
2020-06-01 01:38:22 +08:00
|
|
|
rc = SMB2_set_info_init(tcon, server,
|
|
|
|
|
&rqst[num_rqst],
|
2019-08-30 07:53:56 +08:00
|
|
|
cfile->fid.persistent_fid,
|
|
|
|
|
cfile->fid.volatile_fid, current->tgid,
|
|
|
|
|
FILE_BASIC_INFORMATION,
|
|
|
|
|
SMB2_O_INFO_FILE, 0, data, size);
|
|
|
|
|
else {
|
2020-06-01 01:38:22 +08:00
|
|
|
rc = SMB2_set_info_init(tcon, server,
|
|
|
|
|
&rqst[num_rqst],
|
2019-08-30 07:53:56 +08:00
|
|
|
COMPOUND_FID,
|
|
|
|
|
COMPOUND_FID, current->tgid,
|
|
|
|
|
FILE_BASIC_INFORMATION,
|
|
|
|
|
SMB2_O_INFO_FILE, 0, data, size);
|
|
|
|
|
if (!rc) {
|
|
|
|
|
smb2_set_next_command(tcon, &rqst[num_rqst]);
|
|
|
|
|
smb2_set_related(&rqst[num_rqst]);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
2019-07-16 08:41:46 +08:00
|
|
|
if (rc)
|
|
|
|
|
goto finished;
|
2019-08-30 07:53:56 +08:00
|
|
|
num_rqst++;
|
2019-03-13 13:02:47 +08:00
|
|
|
trace_smb3_set_info_compound_enter(xid, ses->Suid, tcon->tid,
|
|
|
|
|
full_path);
|
2018-09-03 11:33:48 +08:00
|
|
|
break;
|
2018-09-03 11:33:49 +08:00
|
|
|
case SMB2_OP_RENAME:
|
2020-05-20 10:19:59 +08:00
|
|
|
rqst[num_rqst].rq_iov = &vars->si_iov[0];
|
2018-09-03 11:33:49 +08:00
|
|
|
rqst[num_rqst].rq_nvec = 2;
|
|
|
|
|
|
|
|
|
|
len = (2 * UniStrnlen((wchar_t *)ptr, PATH_MAX));
|
|
|
|
|
|
2020-05-20 10:19:59 +08:00
|
|
|
vars->rename_info.ReplaceIfExists = 1;
|
|
|
|
|
vars->rename_info.RootDirectory = 0;
|
|
|
|
|
vars->rename_info.FileNameLength = cpu_to_le32(len);
|
2018-09-03 11:33:49 +08:00
|
|
|
|
|
|
|
|
size[0] = sizeof(struct smb2_file_rename_info);
|
2020-05-20 10:19:59 +08:00
|
|
|
data[0] = &vars->rename_info;
|
2018-09-03 11:33:49 +08:00
|
|
|
|
|
|
|
|
size[1] = len + 2 /* null */;
|
|
|
|
|
data[1] = (__le16 *)ptr;
|
|
|
|
|
|
2019-08-30 06:25:46 +08:00
|
|
|
if (cfile)
|
2020-06-01 01:38:22 +08:00
|
|
|
rc = SMB2_set_info_init(tcon, server,
|
|
|
|
|
&rqst[num_rqst],
|
2019-08-30 06:25:46 +08:00
|
|
|
cfile->fid.persistent_fid,
|
|
|
|
|
cfile->fid.volatile_fid,
|
|
|
|
|
current->tgid, FILE_RENAME_INFORMATION,
|
|
|
|
|
SMB2_O_INFO_FILE, 0, data, size);
|
|
|
|
|
else {
|
2020-06-01 01:38:22 +08:00
|
|
|
rc = SMB2_set_info_init(tcon, server,
|
|
|
|
|
&rqst[num_rqst],
|
2019-08-30 06:25:46 +08:00
|
|
|
COMPOUND_FID, COMPOUND_FID,
|
|
|
|
|
current->tgid, FILE_RENAME_INFORMATION,
|
2018-09-03 11:33:49 +08:00
|
|
|
SMB2_O_INFO_FILE, 0, data, size);
|
2019-08-30 07:53:56 +08:00
|
|
|
if (!rc) {
|
|
|
|
|
smb2_set_next_command(tcon, &rqst[num_rqst]);
|
|
|
|
|
smb2_set_related(&rqst[num_rqst]);
|
|
|
|
|
}
|
2019-08-30 06:25:46 +08:00
|
|
|
}
|
2019-07-16 08:41:46 +08:00
|
|
|
if (rc)
|
|
|
|
|
goto finished;
|
2019-08-30 06:25:46 +08:00
|
|
|
num_rqst++;
|
2019-03-13 13:02:47 +08:00
|
|
|
trace_smb3_rename_enter(xid, ses->Suid, tcon->tid, full_path);
|
2018-09-03 11:33:49 +08:00
|
|
|
break;
|
|
|
|
|
case SMB2_OP_HARDLINK:
|
2020-05-20 10:19:59 +08:00
|
|
|
rqst[num_rqst].rq_iov = &vars->si_iov[0];
|
2018-09-03 11:33:49 +08:00
|
|
|
rqst[num_rqst].rq_nvec = 2;
|
|
|
|
|
|
|
|
|
|
len = (2 * UniStrnlen((wchar_t *)ptr, PATH_MAX));
|
|
|
|
|
|
2020-05-20 10:19:59 +08:00
|
|
|
vars->link_info.ReplaceIfExists = 0;
|
|
|
|
|
vars->link_info.RootDirectory = 0;
|
|
|
|
|
vars->link_info.FileNameLength = cpu_to_le32(len);
|
2018-09-03 11:33:49 +08:00
|
|
|
|
|
|
|
|
size[0] = sizeof(struct smb2_file_link_info);
|
2020-05-20 10:19:59 +08:00
|
|
|
data[0] = &vars->link_info;
|
2018-09-03 11:33:49 +08:00
|
|
|
|
|
|
|
|
size[1] = len + 2 /* null */;
|
|
|
|
|
data[1] = (__le16 *)ptr;
|
|
|
|
|
|
2020-06-01 01:38:22 +08:00
|
|
|
rc = SMB2_set_info_init(tcon, server,
|
|
|
|
|
&rqst[num_rqst], COMPOUND_FID,
|
2018-09-03 11:33:49 +08:00
|
|
|
COMPOUND_FID, current->tgid,
|
|
|
|
|
FILE_LINK_INFORMATION,
|
|
|
|
|
SMB2_O_INFO_FILE, 0, data, size);
|
2019-07-16 08:41:46 +08:00
|
|
|
if (rc)
|
|
|
|
|
goto finished;
|
2018-12-31 11:43:40 +08:00
|
|
|
smb2_set_next_command(tcon, &rqst[num_rqst]);
|
2018-09-03 11:33:49 +08:00
|
|
|
smb2_set_related(&rqst[num_rqst++]);
|
2019-03-13 13:02:47 +08:00
|
|
|
trace_smb3_hardlink_enter(xid, ses->Suid, tcon->tid, full_path);
|
2018-09-03 11:33:49 +08:00
|
|
|
break;
|
2018-09-03 11:33:41 +08:00
|
|
|
default:
|
|
|
|
|
cifs_dbg(VFS, "Invalid command\n");
|
|
|
|
|
rc = -EINVAL;
|
|
|
|
|
}
|
|
|
|
|
if (rc)
|
|
|
|
|
goto finished;
|
|
|
|
|
|
2019-08-30 06:25:46 +08:00
|
|
|
/* We already have a handle so we can skip the close */
|
|
|
|
|
if (cfile)
|
|
|
|
|
goto after_close;
|
2018-09-03 11:33:41 +08:00
|
|
|
/* Close */
|
2021-03-08 23:00:50 +08:00
|
|
|
flags |= CIFS_CP_CREATE_CLOSE_OP;
|
2020-05-20 10:19:59 +08:00
|
|
|
rqst[num_rqst].rq_iov = &vars->close_iov[0];
|
2018-09-03 11:33:41 +08:00
|
|
|
rqst[num_rqst].rq_nvec = 1;
|
2020-06-01 01:38:22 +08:00
|
|
|
rc = SMB2_close_init(tcon, server,
|
|
|
|
|
&rqst[num_rqst], COMPOUND_FID,
|
2019-12-03 11:46:54 +08:00
|
|
|
COMPOUND_FID, false);
|
2019-08-30 06:25:46 +08:00
|
|
|
smb2_set_related(&rqst[num_rqst]);
|
2018-09-03 11:33:41 +08:00
|
|
|
if (rc)
|
|
|
|
|
goto finished;
|
2019-08-30 06:25:46 +08:00
|
|
|
after_close:
|
|
|
|
|
num_rqst++;
|
|
|
|
|
|
|
|
|
|
if (cfile) {
|
|
|
|
|
cifsFileInfo_put(cfile);
|
|
|
|
|
cfile = NULL;
|
2020-06-01 01:38:22 +08:00
|
|
|
rc = compound_send_recv(xid, ses, server,
|
|
|
|
|
flags, num_rqst - 2,
|
2019-08-30 06:25:46 +08:00
|
|
|
&rqst[1], &resp_buftype[1],
|
|
|
|
|
&rsp_iov[1]);
|
|
|
|
|
} else
|
2020-06-01 01:38:22 +08:00
|
|
|
rc = compound_send_recv(xid, ses, server,
|
|
|
|
|
flags, num_rqst,
|
2019-08-30 06:25:46 +08:00
|
|
|
rqst, resp_buftype,
|
|
|
|
|
rsp_iov);
|
2018-09-03 11:33:41 +08:00
|
|
|
|
|
|
|
|
finished:
|
2019-08-30 06:25:46 +08:00
|
|
|
if (cfile)
|
|
|
|
|
cifsFileInfo_put(cfile);
|
|
|
|
|
|
2018-09-03 11:33:41 +08:00
|
|
|
SMB2_open_free(&rqst[0]);
|
2019-09-11 13:07:36 +08:00
|
|
|
if (rc == -EREMCHG) {
|
2020-04-15 13:42:53 +08:00
|
|
|
pr_warn_once("server share %s deleted\n", tcon->treeName);
|
2019-09-11 13:07:36 +08:00
|
|
|
tcon->need_reconnect = true;
|
|
|
|
|
}
|
|
|
|
|
|
2018-09-03 11:33:41 +08:00
|
|
|
switch (command) {
|
|
|
|
|
case SMB2_OP_QUERY_INFO:
|
|
|
|
|
if (rc == 0) {
|
2018-09-03 11:33:45 +08:00
|
|
|
qi_rsp = (struct smb2_query_info_rsp *)
|
|
|
|
|
rsp_iov[1].iov_base;
|
2018-09-03 11:33:41 +08:00
|
|
|
rc = smb2_validate_and_copy_iov(
|
2018-09-03 11:33:45 +08:00
|
|
|
le16_to_cpu(qi_rsp->OutputBufferOffset),
|
|
|
|
|
le32_to_cpu(qi_rsp->OutputBufferLength),
|
2018-09-03 11:33:41 +08:00
|
|
|
&rsp_iov[1], sizeof(struct smb2_file_all_info),
|
2018-09-03 11:33:45 +08:00
|
|
|
ptr);
|
2018-09-03 11:33:41 +08:00
|
|
|
}
|
|
|
|
|
if (rqst[1].rq_iov)
|
|
|
|
|
SMB2_query_info_free(&rqst[1]);
|
|
|
|
|
if (rqst[2].rq_iov)
|
|
|
|
|
SMB2_close_free(&rqst[2]);
|
2019-03-13 13:02:47 +08:00
|
|
|
if (rc)
|
|
|
|
|
trace_smb3_query_info_compound_err(xid, ses->Suid,
|
|
|
|
|
tcon->tid, rc);
|
|
|
|
|
else
|
|
|
|
|
trace_smb3_query_info_compound_done(xid, ses->Suid,
|
|
|
|
|
tcon->tid);
|
2018-09-03 11:33:41 +08:00
|
|
|
break;
|
2020-06-12 08:25:47 +08:00
|
|
|
case SMB2_OP_POSIX_QUERY_INFO:
|
|
|
|
|
if (rc == 0) {
|
|
|
|
|
qi_rsp = (struct smb2_query_info_rsp *)
|
|
|
|
|
rsp_iov[1].iov_base;
|
|
|
|
|
rc = smb2_validate_and_copy_iov(
|
|
|
|
|
le16_to_cpu(qi_rsp->OutputBufferOffset),
|
|
|
|
|
le32_to_cpu(qi_rsp->OutputBufferLength),
|
|
|
|
|
&rsp_iov[1], sizeof(struct smb311_posix_qinfo) /* add SIDs */, ptr);
|
|
|
|
|
}
|
|
|
|
|
if (rqst[1].rq_iov)
|
|
|
|
|
SMB2_query_info_free(&rqst[1]);
|
|
|
|
|
if (rqst[2].rq_iov)
|
|
|
|
|
SMB2_close_free(&rqst[2]);
|
|
|
|
|
if (rc)
|
2020-06-12 12:02:33 +08:00
|
|
|
trace_smb3_posix_query_info_compound_err(xid, ses->Suid, tcon->tid, rc);
|
2020-06-12 08:25:47 +08:00
|
|
|
else
|
2020-06-12 12:02:33 +08:00
|
|
|
trace_smb3_posix_query_info_compound_done(xid, ses->Suid, tcon->tid);
|
2020-06-12 08:25:47 +08:00
|
|
|
break;
|
2018-09-03 11:33:43 +08:00
|
|
|
case SMB2_OP_DELETE:
|
2019-03-13 13:02:47 +08:00
|
|
|
if (rc)
|
|
|
|
|
trace_smb3_delete_err(xid, ses->Suid, tcon->tid, rc);
|
|
|
|
|
else
|
|
|
|
|
trace_smb3_delete_done(xid, ses->Suid, tcon->tid);
|
|
|
|
|
if (rqst[1].rq_iov)
|
|
|
|
|
SMB2_close_free(&rqst[1]);
|
|
|
|
|
break;
|
2018-09-03 11:33:42 +08:00
|
|
|
case SMB2_OP_MKDIR:
|
2019-03-13 13:02:47 +08:00
|
|
|
if (rc)
|
|
|
|
|
trace_smb3_mkdir_err(xid, ses->Suid, tcon->tid, rc);
|
|
|
|
|
else
|
|
|
|
|
trace_smb3_mkdir_done(xid, ses->Suid, tcon->tid);
|
2018-09-03 11:33:42 +08:00
|
|
|
if (rqst[1].rq_iov)
|
|
|
|
|
SMB2_close_free(&rqst[1]);
|
|
|
|
|
break;
|
2018-09-03 11:33:49 +08:00
|
|
|
case SMB2_OP_HARDLINK:
|
2019-03-13 13:02:47 +08:00
|
|
|
if (rc)
|
|
|
|
|
trace_smb3_hardlink_err(xid, ses->Suid, tcon->tid, rc);
|
|
|
|
|
else
|
|
|
|
|
trace_smb3_hardlink_done(xid, ses->Suid, tcon->tid);
|
|
|
|
|
free_set_inf_compound(rqst);
|
|
|
|
|
break;
|
2018-09-03 11:33:49 +08:00
|
|
|
case SMB2_OP_RENAME:
|
2019-03-13 13:02:47 +08:00
|
|
|
if (rc)
|
|
|
|
|
trace_smb3_rename_err(xid, ses->Suid, tcon->tid, rc);
|
|
|
|
|
else
|
|
|
|
|
trace_smb3_rename_done(xid, ses->Suid, tcon->tid);
|
|
|
|
|
free_set_inf_compound(rqst);
|
|
|
|
|
break;
|
2018-09-03 11:33:45 +08:00
|
|
|
case SMB2_OP_RMDIR:
|
2019-03-13 13:02:47 +08:00
|
|
|
if (rc)
|
|
|
|
|
trace_smb3_rmdir_err(xid, ses->Suid, tcon->tid, rc);
|
|
|
|
|
else
|
|
|
|
|
trace_smb3_rmdir_done(xid, ses->Suid, tcon->tid);
|
|
|
|
|
free_set_inf_compound(rqst);
|
|
|
|
|
break;
|
2018-09-03 11:33:48 +08:00
|
|
|
case SMB2_OP_SET_EOF:
|
2019-03-13 13:02:47 +08:00
|
|
|
if (rc)
|
|
|
|
|
trace_smb3_set_eof_err(xid, ses->Suid, tcon->tid, rc);
|
|
|
|
|
else
|
|
|
|
|
trace_smb3_set_eof_done(xid, ses->Suid, tcon->tid);
|
|
|
|
|
free_set_inf_compound(rqst);
|
|
|
|
|
break;
|
2018-09-03 11:33:48 +08:00
|
|
|
case SMB2_OP_SET_INFO:
|
2019-03-13 13:02:47 +08:00
|
|
|
if (rc)
|
|
|
|
|
trace_smb3_set_info_compound_err(xid, ses->Suid,
|
|
|
|
|
tcon->tid, rc);
|
|
|
|
|
else
|
|
|
|
|
trace_smb3_set_info_compound_done(xid, ses->Suid,
|
|
|
|
|
tcon->tid);
|
|
|
|
|
free_set_inf_compound(rqst);
|
2018-09-03 11:33:45 +08:00
|
|
|
break;
|
2018-09-03 11:33:41 +08:00
|
|
|
}
|
|
|
|
|
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);
|
2020-05-20 10:19:59 +08:00
|
|
|
kfree(vars);
|
2018-09-03 11:33:41 +08:00
|
|
|
return rc;
|
|
|
|
|
}
|
|
|
|
|
|
2012-09-19 07:20:26 +08:00
|
|
|
void
|
2011-12-29 21:06:33 +08:00
|
|
|
move_smb2_info_to_cifs(FILE_ALL_INFO *dst, struct smb2_file_all_info *src)
|
|
|
|
|
{
|
|
|
|
|
memcpy(dst, src, (size_t)(&src->CurrentByteOffset) - (size_t)src);
|
|
|
|
|
dst->CurrentByteOffset = src->CurrentByteOffset;
|
|
|
|
|
dst->Mode = src->Mode;
|
|
|
|
|
dst->AlignmentRequirement = src->AlignmentRequirement;
|
|
|
|
|
dst->IndexNumber1 = 0; /* we don't use it */
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
int
|
|
|
|
|
smb2_query_path_info(const unsigned int xid, struct cifs_tcon *tcon,
|
|
|
|
|
struct cifs_sb_info *cifs_sb, const char *full_path,
|
2020-10-23 11:03:14 +08:00
|
|
|
FILE_ALL_INFO *data, bool *adjust_tz, bool *reparse)
|
2011-12-29 21:06:33 +08:00
|
|
|
{
|
|
|
|
|
int rc;
|
|
|
|
|
struct smb2_file_all_info *smb2_data;
|
2018-10-19 13:32:41 +08:00
|
|
|
__u32 create_options = 0;
|
2019-09-09 13:30:00 +08:00
|
|
|
struct cifsFileInfo *cfile;
|
2020-10-05 10:37:52 +08:00
|
|
|
struct cached_fid *cfid = NULL;
|
2011-12-29 21:06:33 +08:00
|
|
|
|
|
|
|
|
*adjust_tz = false;
|
2020-10-23 11:03:14 +08:00
|
|
|
*reparse = false;
|
2011-12-29 21:06:33 +08:00
|
|
|
|
2014-08-22 17:32:11 +08:00
|
|
|
smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
|
2011-12-29 21:06:33 +08:00
|
|
|
GFP_KERNEL);
|
|
|
|
|
if (smb2_data == NULL)
|
|
|
|
|
return -ENOMEM;
|
2019-01-17 03:48:42 +08:00
|
|
|
|
|
|
|
|
/* If it is a root and its handle is cached then use it */
|
2021-03-09 07:07:27 +08:00
|
|
|
if (!strlen(full_path)) {
|
2020-10-05 10:37:52 +08:00
|
|
|
rc = open_shroot(xid, tcon, cifs_sb, &cfid);
|
2021-03-09 07:07:27 +08:00
|
|
|
if (!rc) {
|
|
|
|
|
if (tcon->crfid.file_all_info_is_valid) {
|
|
|
|
|
move_smb2_info_to_cifs(data,
|
2019-03-12 11:58:31 +08:00
|
|
|
&tcon->crfid.file_all_info);
|
2021-03-09 07:07:27 +08:00
|
|
|
} else {
|
|
|
|
|
rc = SMB2_query_info(xid, tcon,
|
2020-10-05 10:37:52 +08:00
|
|
|
cfid->fid->persistent_fid,
|
|
|
|
|
cfid->fid->volatile_fid, smb2_data);
|
2021-03-09 07:07:27 +08:00
|
|
|
if (!rc)
|
|
|
|
|
move_smb2_info_to_cifs(data, smb2_data);
|
|
|
|
|
}
|
|
|
|
|
close_shroot(cfid);
|
|
|
|
|
goto out;
|
2019-03-12 11:58:31 +08:00
|
|
|
}
|
2019-01-17 03:48:42 +08:00
|
|
|
}
|
|
|
|
|
|
2019-09-09 13:30:00 +08:00
|
|
|
cifs_get_readable_path(tcon, full_path, &cfile);
|
2018-09-03 11:33:41 +08:00
|
|
|
rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
|
2018-10-19 13:32:41 +08:00
|
|
|
FILE_READ_ATTRIBUTES, FILE_OPEN, create_options,
|
2019-09-25 13:32:13 +08:00
|
|
|
ACL_NO_MODE, smb2_data, SMB2_OP_QUERY_INFO, cfile);
|
2013-10-23 21:49:47 +08:00
|
|
|
if (rc == -EOPNOTSUPP) {
|
2020-10-23 11:03:14 +08:00
|
|
|
*reparse = true;
|
2018-10-19 13:32:41 +08:00
|
|
|
create_options |= OPEN_REPARSE_POINT;
|
|
|
|
|
|
2013-10-23 21:49:47 +08:00
|
|
|
/* Failed on a symbolic link - query a reparse point info */
|
2018-09-03 11:33:41 +08:00
|
|
|
rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
|
|
|
|
|
FILE_READ_ATTRIBUTES, FILE_OPEN,
|
2019-09-25 13:32:13 +08:00
|
|
|
create_options, ACL_NO_MODE,
|
|
|
|
|
smb2_data, SMB2_OP_QUERY_INFO, NULL);
|
2013-10-23 21:49:47 +08:00
|
|
|
}
|
2011-12-29 21:06:33 +08:00
|
|
|
if (rc)
|
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
|
|
move_smb2_info_to_cifs(data, smb2_data);
|
|
|
|
|
out:
|
|
|
|
|
kfree(smb2_data);
|
|
|
|
|
return rc;
|
|
|
|
|
}
|
2011-07-19 16:56:37 +08:00
|
|
|
|
2020-06-12 08:25:47 +08:00
|
|
|
|
|
|
|
|
int
|
|
|
|
|
smb311_posix_query_path_info(const unsigned int xid, struct cifs_tcon *tcon,
|
|
|
|
|
struct cifs_sb_info *cifs_sb, const char *full_path,
|
2020-10-23 11:03:14 +08:00
|
|
|
struct smb311_posix_qinfo *data, bool *adjust_tz, bool *reparse)
|
2020-06-12 08:25:47 +08:00
|
|
|
{
|
|
|
|
|
int rc;
|
|
|
|
|
__u32 create_options = 0;
|
|
|
|
|
struct cifsFileInfo *cfile;
|
|
|
|
|
struct smb311_posix_qinfo *smb2_data;
|
|
|
|
|
|
|
|
|
|
*adjust_tz = false;
|
2020-10-23 11:03:14 +08:00
|
|
|
*reparse = false;
|
2020-06-12 08:25:47 +08:00
|
|
|
|
|
|
|
|
/* BB TODO: Make struct larger when add support for parsing owner SIDs */
|
|
|
|
|
smb2_data = kzalloc(sizeof(struct smb311_posix_qinfo),
|
|
|
|
|
GFP_KERNEL);
|
|
|
|
|
if (smb2_data == NULL)
|
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* BB TODO: Add support for using the cached root handle.
|
|
|
|
|
* Create SMB2_query_posix_info worker function to do non-compounded query
|
|
|
|
|
* when we already have an open file handle for this. For now this is fast enough
|
|
|
|
|
* (always using the compounded version).
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
cifs_get_readable_path(tcon, full_path, &cfile);
|
|
|
|
|
rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
|
|
|
|
|
FILE_READ_ATTRIBUTES, FILE_OPEN, create_options,
|
|
|
|
|
ACL_NO_MODE, smb2_data, SMB2_OP_POSIX_QUERY_INFO, cfile);
|
|
|
|
|
if (rc == -EOPNOTSUPP) {
|
|
|
|
|
/* BB TODO: When support for special files added to Samba re-verify this path */
|
2020-10-23 11:03:14 +08:00
|
|
|
*reparse = true;
|
2020-06-12 08:25:47 +08:00
|
|
|
create_options |= OPEN_REPARSE_POINT;
|
|
|
|
|
|
|
|
|
|
/* Failed on a symbolic link - query a reparse point info */
|
|
|
|
|
rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
|
|
|
|
|
FILE_READ_ATTRIBUTES, FILE_OPEN,
|
|
|
|
|
create_options, ACL_NO_MODE,
|
|
|
|
|
smb2_data, SMB2_OP_POSIX_QUERY_INFO, NULL);
|
|
|
|
|
}
|
|
|
|
|
if (rc)
|
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
|
|
/* TODO: will need to allow for the 2 SIDs when add support for getting owner UID/GID */
|
|
|
|
|
memcpy(data, smb2_data, sizeof(struct smb311_posix_qinfo));
|
|
|
|
|
|
|
|
|
|
out:
|
|
|
|
|
kfree(smb2_data);
|
|
|
|
|
return rc;
|
|
|
|
|
}
|
|
|
|
|
|
2011-07-19 16:56:37 +08:00
|
|
|
int
|
2019-09-25 13:32:13 +08:00
|
|
|
smb2_mkdir(const unsigned int xid, struct inode *parent_inode, umode_t mode,
|
|
|
|
|
struct cifs_tcon *tcon, const char *name,
|
2011-07-19 16:56:37 +08:00
|
|
|
struct cifs_sb_info *cifs_sb)
|
|
|
|
|
{
|
2018-09-03 11:33:42 +08:00
|
|
|
return smb2_compound_op(xid, tcon, cifs_sb, name,
|
|
|
|
|
FILE_WRITE_ATTRIBUTES, FILE_CREATE,
|
2019-09-25 13:32:13 +08:00
|
|
|
CREATE_NOT_FILE, mode, NULL, SMB2_OP_MKDIR,
|
|
|
|
|
NULL);
|
2011-07-19 16:56:37 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
void
|
|
|
|
|
smb2_mkdir_setinfo(struct inode *inode, const char *name,
|
|
|
|
|
struct cifs_sb_info *cifs_sb, struct cifs_tcon *tcon,
|
|
|
|
|
const unsigned int xid)
|
|
|
|
|
{
|
|
|
|
|
FILE_BASIC_INFO data;
|
|
|
|
|
struct cifsInodeInfo *cifs_i;
|
2019-08-30 07:53:56 +08:00
|
|
|
struct cifsFileInfo *cfile;
|
2011-07-19 16:56:37 +08:00
|
|
|
u32 dosattrs;
|
|
|
|
|
int tmprc;
|
|
|
|
|
|
|
|
|
|
memset(&data, 0, sizeof(data));
|
|
|
|
|
cifs_i = CIFS_I(inode);
|
|
|
|
|
dosattrs = cifs_i->cifsAttrs | ATTR_READONLY;
|
|
|
|
|
data.Attributes = cpu_to_le32(dosattrs);
|
cifs: fix rename() by ensuring source handle opened with DELETE bit
To rename a file in SMB2 we open it with the DELETE access and do a
special SetInfo on it. If the handle is missing the DELETE bit the
server will fail the SetInfo with STATUS_ACCESS_DENIED.
We currently try to reuse any existing opened handle we have with
cifs_get_writable_path(). That function looks for handles with WRITE
access but doesn't check for DELETE, making rename() fail if it finds
a handle to reuse. Simple reproducer below.
To select handles with the DELETE bit, this patch adds a flag argument
to cifs_get_writable_path() and find_writable_file() and the existing
'bool fsuid_only' argument is converted to a flag.
The cifsFileInfo struct only stores the UNIX open mode but not the
original SMB access flags. Since the DELETE bit is not mapped in that
mode, this patch stores the access mask in cifs_fid on file open,
which is accessible from cifsFileInfo.
Simple reproducer:
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#define E(s) perror(s), exit(1)
int main(int argc, char *argv[])
{
int fd, ret;
if (argc != 3) {
fprintf(stderr, "Usage: %s A B\n"
"create&open A in write mode, "
"rename A to B, close A\n", argv[0]);
return 0;
}
fd = openat(AT_FDCWD, argv[1], O_WRONLY|O_CREAT|O_SYNC, 0666);
if (fd == -1) E("openat()");
ret = rename(argv[1], argv[2]);
if (ret) E("rename()");
ret = close(fd);
if (ret) E("close()");
return ret;
}
$ gcc -o bugrename bugrename.c
$ ./bugrename /mnt/a /mnt/b
rename(): Permission denied
Fixes: 8de9e86c67ba ("cifs: create a helper to find a writeable handle by path name")
CC: Stable <stable@vger.kernel.org>
Signed-off-by: Aurelien Aptel <aaptel@suse.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
Reviewed-by: Paulo Alcantara (SUSE) <pc@cjr.nz>
2020-02-21 18:19:06 +08:00
|
|
|
cifs_get_writable_path(tcon, name, FIND_WR_ANY, &cfile);
|
2018-09-03 11:33:48 +08:00
|
|
|
tmprc = smb2_compound_op(xid, tcon, cifs_sb, name,
|
|
|
|
|
FILE_WRITE_ATTRIBUTES, FILE_CREATE,
|
2019-09-25 13:32:13 +08:00
|
|
|
CREATE_NOT_FILE, ACL_NO_MODE,
|
|
|
|
|
&data, SMB2_OP_SET_INFO, cfile);
|
2011-07-19 16:56:37 +08:00
|
|
|
if (tmprc == 0)
|
|
|
|
|
cifs_i->cifsAttrs = dosattrs;
|
|
|
|
|
}
|
2012-07-10 20:14:38 +08:00
|
|
|
|
|
|
|
|
int
|
|
|
|
|
smb2_rmdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
|
|
|
|
|
struct cifs_sb_info *cifs_sb)
|
|
|
|
|
{
|
2018-09-03 11:33:45 +08:00
|
|
|
return smb2_compound_op(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
|
2019-09-25 13:32:13 +08:00
|
|
|
CREATE_NOT_FILE, ACL_NO_MODE,
|
2019-08-30 06:25:46 +08:00
|
|
|
NULL, SMB2_OP_RMDIR, NULL);
|
2012-07-10 20:14:38 +08:00
|
|
|
}
|
2012-09-19 07:20:25 +08:00
|
|
|
|
|
|
|
|
int
|
|
|
|
|
smb2_unlink(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
|
|
|
|
|
struct cifs_sb_info *cifs_sb)
|
|
|
|
|
{
|
2018-09-03 11:33:43 +08:00
|
|
|
return smb2_compound_op(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
|
|
|
|
|
CREATE_DELETE_ON_CLOSE | OPEN_REPARSE_POINT,
|
2019-09-25 13:32:13 +08:00
|
|
|
ACL_NO_MODE, NULL, SMB2_OP_DELETE, NULL);
|
2012-09-19 07:20:25 +08:00
|
|
|
}
|
2012-09-19 07:20:31 +08:00
|
|
|
|
2012-09-19 07:20:31 +08:00
|
|
|
static int
|
|
|
|
|
smb2_set_path_attr(const unsigned int xid, struct cifs_tcon *tcon,
|
|
|
|
|
const char *from_name, const char *to_name,
|
2019-08-30 06:25:46 +08:00
|
|
|
struct cifs_sb_info *cifs_sb, __u32 access, int command,
|
|
|
|
|
struct cifsFileInfo *cfile)
|
2012-09-19 07:20:31 +08:00
|
|
|
{
|
|
|
|
|
__le16 *smb2_to_name = NULL;
|
|
|
|
|
int rc;
|
|
|
|
|
|
|
|
|
|
smb2_to_name = cifs_convert_path_to_utf16(to_name, cifs_sb);
|
|
|
|
|
if (smb2_to_name == NULL) {
|
|
|
|
|
rc = -ENOMEM;
|
|
|
|
|
goto smb2_rename_path;
|
|
|
|
|
}
|
2018-09-03 11:33:49 +08:00
|
|
|
rc = smb2_compound_op(xid, tcon, cifs_sb, from_name, access,
|
2019-09-25 13:32:13 +08:00
|
|
|
FILE_OPEN, 0, ACL_NO_MODE, smb2_to_name,
|
|
|
|
|
command, cfile);
|
2012-09-19 07:20:31 +08:00
|
|
|
smb2_rename_path:
|
|
|
|
|
kfree(smb2_to_name);
|
|
|
|
|
return rc;
|
|
|
|
|
}
|
2012-09-19 07:20:31 +08:00
|
|
|
|
|
|
|
|
int
|
|
|
|
|
smb2_rename_path(const unsigned int xid, struct cifs_tcon *tcon,
|
|
|
|
|
const char *from_name, const char *to_name,
|
|
|
|
|
struct cifs_sb_info *cifs_sb)
|
|
|
|
|
{
|
2019-08-30 06:25:46 +08:00
|
|
|
struct cifsFileInfo *cfile;
|
|
|
|
|
|
cifs: fix rename() by ensuring source handle opened with DELETE bit
To rename a file in SMB2 we open it with the DELETE access and do a
special SetInfo on it. If the handle is missing the DELETE bit the
server will fail the SetInfo with STATUS_ACCESS_DENIED.
We currently try to reuse any existing opened handle we have with
cifs_get_writable_path(). That function looks for handles with WRITE
access but doesn't check for DELETE, making rename() fail if it finds
a handle to reuse. Simple reproducer below.
To select handles with the DELETE bit, this patch adds a flag argument
to cifs_get_writable_path() and find_writable_file() and the existing
'bool fsuid_only' argument is converted to a flag.
The cifsFileInfo struct only stores the UNIX open mode but not the
original SMB access flags. Since the DELETE bit is not mapped in that
mode, this patch stores the access mask in cifs_fid on file open,
which is accessible from cifsFileInfo.
Simple reproducer:
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#define E(s) perror(s), exit(1)
int main(int argc, char *argv[])
{
int fd, ret;
if (argc != 3) {
fprintf(stderr, "Usage: %s A B\n"
"create&open A in write mode, "
"rename A to B, close A\n", argv[0]);
return 0;
}
fd = openat(AT_FDCWD, argv[1], O_WRONLY|O_CREAT|O_SYNC, 0666);
if (fd == -1) E("openat()");
ret = rename(argv[1], argv[2]);
if (ret) E("rename()");
ret = close(fd);
if (ret) E("close()");
return ret;
}
$ gcc -o bugrename bugrename.c
$ ./bugrename /mnt/a /mnt/b
rename(): Permission denied
Fixes: 8de9e86c67ba ("cifs: create a helper to find a writeable handle by path name")
CC: Stable <stable@vger.kernel.org>
Signed-off-by: Aurelien Aptel <aaptel@suse.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
Reviewed-by: Paulo Alcantara (SUSE) <pc@cjr.nz>
2020-02-21 18:19:06 +08:00
|
|
|
cifs_get_writable_path(tcon, from_name, FIND_WR_WITH_DELETE, &cfile);
|
2019-08-30 06:25:46 +08:00
|
|
|
|
|
|
|
|
return smb2_set_path_attr(xid, tcon, from_name, to_name,
|
|
|
|
|
cifs_sb, DELETE, SMB2_OP_RENAME, cfile);
|
2012-09-19 07:20:31 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
int
|
|
|
|
|
smb2_create_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
|
|
|
|
|
const char *from_name, const char *to_name,
|
|
|
|
|
struct cifs_sb_info *cifs_sb)
|
|
|
|
|
{
|
|
|
|
|
return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb,
|
2019-08-30 06:25:46 +08:00
|
|
|
FILE_READ_ATTRIBUTES, SMB2_OP_HARDLINK,
|
|
|
|
|
NULL);
|
2012-09-19 07:20:31 +08:00
|
|
|
}
|
2012-09-19 07:20:32 +08:00
|
|
|
|
|
|
|
|
int
|
|
|
|
|
smb2_set_path_size(const unsigned int xid, struct cifs_tcon *tcon,
|
|
|
|
|
const char *full_path, __u64 size,
|
|
|
|
|
struct cifs_sb_info *cifs_sb, bool set_alloc)
|
|
|
|
|
{
|
|
|
|
|
__le64 eof = cpu_to_le64(size);
|
2018-09-03 11:33:46 +08:00
|
|
|
|
|
|
|
|
return smb2_compound_op(xid, tcon, cifs_sb, full_path,
|
2019-09-25 13:32:13 +08:00
|
|
|
FILE_WRITE_DATA, FILE_OPEN, 0, ACL_NO_MODE,
|
|
|
|
|
&eof, SMB2_OP_SET_EOF, NULL);
|
2012-09-19 07:20:32 +08:00
|
|
|
}
|
2012-09-19 07:20:32 +08:00
|
|
|
|
|
|
|
|
int
|
|
|
|
|
smb2_set_file_info(struct inode *inode, const char *full_path,
|
|
|
|
|
FILE_BASIC_INFO *buf, const unsigned int xid)
|
|
|
|
|
{
|
|
|
|
|
struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
|
|
|
|
|
struct tcon_link *tlink;
|
|
|
|
|
int rc;
|
|
|
|
|
|
2016-09-27 03:23:08 +08:00
|
|
|
if ((buf->CreationTime == 0) && (buf->LastAccessTime == 0) &&
|
2018-08-03 09:28:18 +08:00
|
|
|
(buf->LastWriteTime == 0) && (buf->ChangeTime == 0) &&
|
2016-09-27 03:23:08 +08:00
|
|
|
(buf->Attributes == 0))
|
|
|
|
|
return 0; /* would be a no op, no sense sending this */
|
|
|
|
|
|
2012-09-19 07:20:32 +08:00
|
|
|
tlink = cifs_sb_tlink(cifs_sb);
|
|
|
|
|
if (IS_ERR(tlink))
|
|
|
|
|
return PTR_ERR(tlink);
|
2016-09-27 03:23:08 +08:00
|
|
|
|
2018-09-03 11:33:48 +08:00
|
|
|
rc = smb2_compound_op(xid, tlink_tcon(tlink), cifs_sb, full_path,
|
2019-09-25 13:32:13 +08:00
|
|
|
FILE_WRITE_ATTRIBUTES, FILE_OPEN,
|
|
|
|
|
0, ACL_NO_MODE, buf, SMB2_OP_SET_INFO, NULL);
|
2012-09-19 07:20:32 +08:00
|
|
|
cifs_put_tlink(tlink);
|
|
|
|
|
return rc;
|
|
|
|
|
}
|