607 строки
16 KiB
C
607 строки
16 KiB
C
/*
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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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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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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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__u32 create_options, void *ptr, int command,
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struct cifsFileInfo *cfile)
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{
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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_open_parms oparms;
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struct cifs_fid fid;
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struct cifs_ses *ses = tcon->ses;
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int num_rqst = 0;
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struct smb_rqst rqst[3];
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int resp_buftype[3];
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struct kvec rsp_iov[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_query_info_rsp *qi_rsp = NULL;
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int flags = 0;
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__u8 delete_pending[8] = {1, 0, 0, 0, 0, 0, 0, 0};
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unsigned int size[2];
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void *data[2];
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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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int len;
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if (smb3_encryption_required(tcon))
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flags |= CIFS_TRANSFORM_REQ;
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memset(rqst, 0, sizeof(rqst));
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resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
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memset(rsp_iov, 0, sizeof(rsp_iov));
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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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/* Open */
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utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
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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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oparms.tcon = tcon;
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oparms.desired_access = desired_access;
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oparms.disposition = create_disposition;
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oparms.create_options = create_options;
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if (backup_cred(cifs_sb))
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oparms.create_options |= CREATE_OPEN_BACKUP_INTENT;
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oparms.fid = &fid;
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oparms.reconnect = false;
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memset(&open_iov, 0, sizeof(open_iov));
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rqst[num_rqst].rq_iov = open_iov;
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rqst[num_rqst].rq_nvec = SMB2_CREATE_IOV_SIZE;
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rc = SMB2_open_init(tcon, &rqst[num_rqst], &oplock, &oparms,
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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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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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/* Operation */
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switch (command) {
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case SMB2_OP_QUERY_INFO:
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memset(&qi_iov, 0, sizeof(qi_iov));
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rqst[num_rqst].rq_iov = qi_iov;
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rqst[num_rqst].rq_nvec = 1;
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rc = SMB2_query_info_init(tcon, &rqst[num_rqst], COMPOUND_FID,
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COMPOUND_FID, FILE_ALL_INFORMATION,
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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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goto finished;
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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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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_DELETE:
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trace_smb3_delete_enter(xid, ses->Suid, tcon->tid, full_path);
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break;
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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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trace_smb3_mkdir_enter(xid, ses->Suid, tcon->tid, full_path);
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break;
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case SMB2_OP_RMDIR:
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memset(&si_iov, 0, sizeof(si_iov));
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rqst[num_rqst].rq_iov = si_iov;
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rqst[num_rqst].rq_nvec = 1;
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size[0] = 1; /* sizeof __u8 See MS-FSCC section 2.4.11 */
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data[0] = &delete_pending[0];
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rc = SMB2_set_info_init(tcon, &rqst[num_rqst], COMPOUND_FID,
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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);
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if (rc)
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goto finished;
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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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trace_smb3_rmdir_enter(xid, ses->Suid, tcon->tid, full_path);
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break;
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case SMB2_OP_SET_EOF:
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memset(&si_iov, 0, sizeof(si_iov));
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rqst[num_rqst].rq_iov = si_iov;
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rqst[num_rqst].rq_nvec = 1;
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size[0] = 8; /* sizeof __le64 */
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data[0] = ptr;
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rc = SMB2_set_info_init(tcon, &rqst[num_rqst], COMPOUND_FID,
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COMPOUND_FID, current->tgid,
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FILE_END_OF_FILE_INFORMATION,
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SMB2_O_INFO_FILE, 0, data, size);
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if (rc)
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goto finished;
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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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trace_smb3_set_eof_enter(xid, ses->Suid, tcon->tid, full_path);
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break;
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case SMB2_OP_SET_INFO:
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memset(&si_iov, 0, sizeof(si_iov));
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rqst[num_rqst].rq_iov = si_iov;
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rqst[num_rqst].rq_nvec = 1;
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size[0] = sizeof(FILE_BASIC_INFO);
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data[0] = ptr;
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if (cfile)
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rc = SMB2_set_info_init(tcon, &rqst[num_rqst],
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cfile->fid.persistent_fid,
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cfile->fid.volatile_fid, current->tgid,
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FILE_BASIC_INFORMATION,
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SMB2_O_INFO_FILE, 0, data, size);
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else {
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rc = SMB2_set_info_init(tcon, &rqst[num_rqst],
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COMPOUND_FID,
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COMPOUND_FID, current->tgid,
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FILE_BASIC_INFORMATION,
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SMB2_O_INFO_FILE, 0, data, size);
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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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if (rc)
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goto finished;
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num_rqst++;
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trace_smb3_set_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_RENAME:
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memset(&si_iov, 0, sizeof(si_iov));
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rqst[num_rqst].rq_iov = si_iov;
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rqst[num_rqst].rq_nvec = 2;
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len = (2 * UniStrnlen((wchar_t *)ptr, PATH_MAX));
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rename_info.ReplaceIfExists = 1;
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rename_info.RootDirectory = 0;
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rename_info.FileNameLength = cpu_to_le32(len);
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size[0] = sizeof(struct smb2_file_rename_info);
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data[0] = &rename_info;
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size[1] = len + 2 /* null */;
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data[1] = (__le16 *)ptr;
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if (cfile)
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rc = SMB2_set_info_init(tcon, &rqst[num_rqst],
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cfile->fid.persistent_fid,
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cfile->fid.volatile_fid,
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current->tgid, FILE_RENAME_INFORMATION,
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SMB2_O_INFO_FILE, 0, data, size);
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else {
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rc = SMB2_set_info_init(tcon, &rqst[num_rqst],
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COMPOUND_FID, COMPOUND_FID,
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current->tgid, FILE_RENAME_INFORMATION,
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SMB2_O_INFO_FILE, 0, data, size);
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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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if (rc)
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goto finished;
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num_rqst++;
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trace_smb3_rename_enter(xid, ses->Suid, tcon->tid, full_path);
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break;
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case SMB2_OP_HARDLINK:
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memset(&si_iov, 0, sizeof(si_iov));
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rqst[num_rqst].rq_iov = si_iov;
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rqst[num_rqst].rq_nvec = 2;
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len = (2 * UniStrnlen((wchar_t *)ptr, PATH_MAX));
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link_info.ReplaceIfExists = 0;
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link_info.RootDirectory = 0;
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link_info.FileNameLength = cpu_to_le32(len);
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size[0] = sizeof(struct smb2_file_link_info);
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data[0] = &link_info;
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size[1] = len + 2 /* null */;
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data[1] = (__le16 *)ptr;
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rc = SMB2_set_info_init(tcon, &rqst[num_rqst], COMPOUND_FID,
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COMPOUND_FID, current->tgid,
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FILE_LINK_INFORMATION,
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SMB2_O_INFO_FILE, 0, data, size);
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if (rc)
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goto finished;
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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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trace_smb3_hardlink_enter(xid, ses->Suid, tcon->tid, full_path);
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break;
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default:
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cifs_dbg(VFS, "Invalid command\n");
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rc = -EINVAL;
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}
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if (rc)
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goto finished;
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/* We already have a handle so we can skip the close */
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if (cfile)
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goto after_close;
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/* Close */
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memset(&close_iov, 0, sizeof(close_iov));
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rqst[num_rqst].rq_iov = close_iov;
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rqst[num_rqst].rq_nvec = 1;
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rc = SMB2_close_init(tcon, &rqst[num_rqst], COMPOUND_FID,
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COMPOUND_FID);
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smb2_set_related(&rqst[num_rqst]);
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if (rc)
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goto finished;
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after_close:
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num_rqst++;
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if (cfile) {
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cifsFileInfo_put(cfile);
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cfile = NULL;
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rc = compound_send_recv(xid, ses, flags, num_rqst - 2,
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&rqst[1], &resp_buftype[1],
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&rsp_iov[1]);
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} else
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rc = compound_send_recv(xid, ses, flags, num_rqst,
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rqst, resp_buftype,
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rsp_iov);
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finished:
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if (cfile)
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cifsFileInfo_put(cfile);
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SMB2_open_free(&rqst[0]);
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switch (command) {
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case SMB2_OP_QUERY_INFO:
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if (rc == 0) {
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qi_rsp = (struct smb2_query_info_rsp *)
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rsp_iov[1].iov_base;
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rc = smb2_validate_and_copy_iov(
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le16_to_cpu(qi_rsp->OutputBufferOffset),
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le32_to_cpu(qi_rsp->OutputBufferLength),
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&rsp_iov[1], sizeof(struct smb2_file_all_info),
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ptr);
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}
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if (rqst[1].rq_iov)
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SMB2_query_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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if (rc)
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trace_smb3_query_info_compound_err(xid, ses->Suid,
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tcon->tid, rc);
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else
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trace_smb3_query_info_compound_done(xid, ses->Suid,
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tcon->tid);
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break;
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case SMB2_OP_DELETE:
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if (rc)
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trace_smb3_delete_err(xid, ses->Suid, tcon->tid, rc);
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else
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trace_smb3_delete_done(xid, ses->Suid, tcon->tid);
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if (rqst[1].rq_iov)
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SMB2_close_free(&rqst[1]);
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break;
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case SMB2_OP_MKDIR:
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if (rc)
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trace_smb3_mkdir_err(xid, ses->Suid, tcon->tid, rc);
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else
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trace_smb3_mkdir_done(xid, ses->Suid, tcon->tid);
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if (rqst[1].rq_iov)
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SMB2_close_free(&rqst[1]);
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break;
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case SMB2_OP_HARDLINK:
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if (rc)
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trace_smb3_hardlink_err(xid, ses->Suid, tcon->tid, rc);
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else
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trace_smb3_hardlink_done(xid, ses->Suid, tcon->tid);
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free_set_inf_compound(rqst);
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break;
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case SMB2_OP_RENAME:
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if (rc)
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trace_smb3_rename_err(xid, ses->Suid, tcon->tid, rc);
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else
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trace_smb3_rename_done(xid, ses->Suid, tcon->tid);
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free_set_inf_compound(rqst);
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break;
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case SMB2_OP_RMDIR:
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if (rc)
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trace_smb3_rmdir_err(xid, ses->Suid, tcon->tid, rc);
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else
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trace_smb3_rmdir_done(xid, ses->Suid, tcon->tid);
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free_set_inf_compound(rqst);
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break;
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case SMB2_OP_SET_EOF:
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if (rc)
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trace_smb3_set_eof_err(xid, ses->Suid, tcon->tid, rc);
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else
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trace_smb3_set_eof_done(xid, ses->Suid, tcon->tid);
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free_set_inf_compound(rqst);
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break;
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case SMB2_OP_SET_INFO:
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if (rc)
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trace_smb3_set_info_compound_err(xid, ses->Suid,
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tcon->tid, rc);
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else
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trace_smb3_set_info_compound_done(xid, ses->Suid,
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tcon->tid);
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free_set_inf_compound(rqst);
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break;
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}
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free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
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free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
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free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
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return rc;
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}
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void
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move_smb2_info_to_cifs(FILE_ALL_INFO *dst, struct smb2_file_all_info *src)
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{
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memcpy(dst, src, (size_t)(&src->CurrentByteOffset) - (size_t)src);
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dst->CurrentByteOffset = src->CurrentByteOffset;
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dst->Mode = src->Mode;
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dst->AlignmentRequirement = src->AlignmentRequirement;
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dst->IndexNumber1 = 0; /* we don't use it */
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}
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int
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smb2_query_path_info(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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FILE_ALL_INFO *data, bool *adjust_tz, bool *symlink)
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{
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int rc;
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struct smb2_file_all_info *smb2_data;
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__u32 create_options = 0;
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struct cifs_fid fid;
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bool no_cached_open = tcon->nohandlecache;
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*adjust_tz = false;
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*symlink = false;
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smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
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GFP_KERNEL);
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if (smb2_data == NULL)
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return -ENOMEM;
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/* If it is a root and its handle is cached then use it */
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if (!strlen(full_path) && !no_cached_open) {
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rc = open_shroot(xid, tcon, &fid);
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if (rc)
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goto out;
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if (tcon->crfid.file_all_info_is_valid) {
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move_smb2_info_to_cifs(data,
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&tcon->crfid.file_all_info);
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} else {
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rc = SMB2_query_info(xid, tcon, fid.persistent_fid,
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fid.volatile_fid, smb2_data);
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if (!rc)
|
|
move_smb2_info_to_cifs(data, smb2_data);
|
|
}
|
|
close_shroot(&tcon->crfid);
|
|
goto out;
|
|
}
|
|
|
|
if (backup_cred(cifs_sb))
|
|
create_options |= CREATE_OPEN_BACKUP_INTENT;
|
|
|
|
rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
|
|
FILE_READ_ATTRIBUTES, FILE_OPEN, create_options,
|
|
smb2_data, SMB2_OP_QUERY_INFO, NULL);
|
|
if (rc == -EOPNOTSUPP) {
|
|
*symlink = true;
|
|
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, smb2_data,
|
|
SMB2_OP_QUERY_INFO, NULL);
|
|
}
|
|
if (rc)
|
|
goto out;
|
|
|
|
move_smb2_info_to_cifs(data, smb2_data);
|
|
out:
|
|
kfree(smb2_data);
|
|
return rc;
|
|
}
|
|
|
|
int
|
|
smb2_mkdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
|
|
struct cifs_sb_info *cifs_sb)
|
|
{
|
|
return smb2_compound_op(xid, tcon, cifs_sb, name,
|
|
FILE_WRITE_ATTRIBUTES, FILE_CREATE,
|
|
CREATE_NOT_FILE, NULL, SMB2_OP_MKDIR, NULL);
|
|
}
|
|
|
|
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;
|
|
struct cifsFileInfo *cfile;
|
|
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_get_writable_path(tcon, name, &cfile);
|
|
tmprc = smb2_compound_op(xid, tcon, cifs_sb, name,
|
|
FILE_WRITE_ATTRIBUTES, FILE_CREATE,
|
|
CREATE_NOT_FILE, &data, SMB2_OP_SET_INFO,
|
|
cfile);
|
|
if (tmprc == 0)
|
|
cifs_i->cifsAttrs = dosattrs;
|
|
}
|
|
|
|
int
|
|
smb2_rmdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
|
|
struct cifs_sb_info *cifs_sb)
|
|
{
|
|
return smb2_compound_op(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
|
|
CREATE_NOT_FILE,
|
|
NULL, SMB2_OP_RMDIR, NULL);
|
|
}
|
|
|
|
int
|
|
smb2_unlink(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
|
|
struct cifs_sb_info *cifs_sb)
|
|
{
|
|
return smb2_compound_op(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
|
|
CREATE_DELETE_ON_CLOSE | OPEN_REPARSE_POINT,
|
|
NULL, SMB2_OP_DELETE, NULL);
|
|
}
|
|
|
|
static int
|
|
smb2_set_path_attr(const unsigned int xid, struct cifs_tcon *tcon,
|
|
const char *from_name, const char *to_name,
|
|
struct cifs_sb_info *cifs_sb, __u32 access, int command,
|
|
struct cifsFileInfo *cfile)
|
|
{
|
|
__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;
|
|
}
|
|
rc = smb2_compound_op(xid, tcon, cifs_sb, from_name, access,
|
|
FILE_OPEN, 0, smb2_to_name, command, cfile);
|
|
smb2_rename_path:
|
|
kfree(smb2_to_name);
|
|
return rc;
|
|
}
|
|
|
|
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)
|
|
{
|
|
struct cifsFileInfo *cfile;
|
|
|
|
cifs_get_writable_path(tcon, from_name, &cfile);
|
|
|
|
return smb2_set_path_attr(xid, tcon, from_name, to_name,
|
|
cifs_sb, DELETE, SMB2_OP_RENAME, cfile);
|
|
}
|
|
|
|
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,
|
|
FILE_READ_ATTRIBUTES, SMB2_OP_HARDLINK,
|
|
NULL);
|
|
}
|
|
|
|
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);
|
|
|
|
return smb2_compound_op(xid, tcon, cifs_sb, full_path,
|
|
FILE_WRITE_DATA, FILE_OPEN, 0, &eof,
|
|
SMB2_OP_SET_EOF, NULL);
|
|
}
|
|
|
|
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;
|
|
|
|
if ((buf->CreationTime == 0) && (buf->LastAccessTime == 0) &&
|
|
(buf->LastWriteTime == 0) && (buf->ChangeTime == 0) &&
|
|
(buf->Attributes == 0))
|
|
return 0; /* would be a no op, no sense sending this */
|
|
|
|
tlink = cifs_sb_tlink(cifs_sb);
|
|
if (IS_ERR(tlink))
|
|
return PTR_ERR(tlink);
|
|
|
|
rc = smb2_compound_op(xid, tlink_tcon(tlink), cifs_sb, full_path,
|
|
FILE_WRITE_ATTRIBUTES, FILE_OPEN, 0, buf,
|
|
SMB2_OP_SET_INFO, NULL);
|
|
cifs_put_tlink(tlink);
|
|
return rc;
|
|
}
|