forked from Minki/linux
cifs: update smb2_queryfs() to use compounding
Change smb2_queryfs() to use a Create/QueryInfo/Close compound request. Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com> Signed-off-by: Steve French <stfrench@microsoft.com> Reviewed-by: Paulo Alcantara <palcantara@suse.com> Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
This commit is contained in:
Ronnie Sahlberg
Steve French
parent
b24df3e30c
commit
730928c8f4
@ -1524,15 +1524,66 @@ smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
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CIFS_CACHE_READ(cinode) ? 1 : 0);
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}
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static void
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smb2_set_related(struct smb_rqst *rqst)
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{
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struct smb2_sync_hdr *shdr;
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shdr = (struct smb2_sync_hdr *)(rqst->rq_iov[0].iov_base);
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shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
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}
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char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0};
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static void
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smb2_set_next_command(struct TCP_Server_Info *server, struct smb_rqst *rqst)
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{
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struct smb2_sync_hdr *shdr;
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unsigned long len = smb_rqst_len(server, rqst);
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/* SMB headers in a compound are 8 byte aligned. */
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if (len & 7) {
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rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding;
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rqst->rq_iov[rqst->rq_nvec].iov_len = 8 - (len & 7);
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rqst->rq_nvec++;
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len = smb_rqst_len(server, rqst);
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}
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shdr = (struct smb2_sync_hdr *)(rqst->rq_iov[0].iov_base);
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shdr->NextCommand = cpu_to_le32(len);
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}
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static int
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smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
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struct kstatfs *buf)
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{
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int rc;
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struct smb2_query_info_rsp *rsp;
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struct smb2_fs_full_size_info *info = NULL;
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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[5]; /* 4 + potential padding. */
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struct kvec qi_iov[1];
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struct kvec close_iov[1];
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struct cifs_ses *ses = tcon->ses;
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struct TCP_Server_Info *server = ses->server;
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__le16 srch_path = 0; /* Null - open root of share */
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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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int flags = 0;
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int rc;
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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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memset(resp_buftype, 0, sizeof(resp_buftype));
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memset(rsp_iov, 0, sizeof(rsp_iov));
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memset(&open_iov, 0, sizeof(open_iov));
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rqst[0].rq_iov = open_iov;
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rqst[0].rq_nvec = 4;
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oparms.tcon = tcon;
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oparms.desired_access = FILE_READ_ATTRIBUTES;
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@ -1541,13 +1592,56 @@ smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
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oparms.fid = &fid;
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oparms.reconnect = false;
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rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, NULL);
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rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, &srch_path);
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if (rc)
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return rc;
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goto qfs_exit;
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smb2_set_next_command(server, &rqst[0]);
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memset(&qi_iov, 0, sizeof(qi_iov));
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rqst[1].rq_iov = qi_iov;
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rqst[1].rq_nvec = 1;
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rc = SMB2_query_info_init(tcon, &rqst[1], COMPOUND_FID, COMPOUND_FID,
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FS_FULL_SIZE_INFORMATION,
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SMB2_O_INFO_FILESYSTEM, 0,
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sizeof(struct smb2_fs_full_size_info));
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if (rc)
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goto qfs_exit;
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smb2_set_next_command(server, &rqst[1]);
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smb2_set_related(&rqst[1]);
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memset(&close_iov, 0, sizeof(close_iov));
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rqst[2].rq_iov = close_iov;
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rqst[2].rq_nvec = 1;
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rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID);
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if (rc)
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goto qfs_exit;
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smb2_set_related(&rqst[2]);
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rc = compound_send_recv(xid, ses, flags, 3, rqst,
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resp_buftype, rsp_iov);
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if (rc)
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goto qfs_exit;
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rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
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buf->f_type = SMB2_MAGIC_NUMBER;
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rc = SMB2_QFS_info(xid, tcon, fid.persistent_fid, fid.volatile_fid,
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buf);
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SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
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info = (struct smb2_fs_full_size_info *)(
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le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
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rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
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le32_to_cpu(rsp->OutputBufferLength),
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&rsp_iov[1],
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sizeof(struct smb2_fs_full_size_info));
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if (!rc)
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smb2_copy_fs_info_to_kstatfs(info, buf);
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qfs_exit:
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SMB2_open_free(&rqst[0]);
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SMB2_query_info_free(&rqst[1]);
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SMB2_close_free(&rqst[2]);
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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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@ -80,7 +80,7 @@ static const int smb2_req_struct_sizes[NUMBER_OF_SMB2_COMMANDS] = {
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/* SMB2_OPLOCK_BREAK */ 24 /* BB this is 36 for LEASE_BREAK variant */
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};
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static int smb3_encryption_required(const struct cifs_tcon *tcon)
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int smb3_encryption_required(const struct cifs_tcon *tcon)
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{
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if (!tcon)
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return 0;
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@ -2182,7 +2182,8 @@ SMB2_open_free(struct smb_rqst *rqst)
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cifs_small_buf_release(rqst->rq_iov[0].iov_base);
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for (i = 1; i < rqst->rq_nvec; i++)
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kfree(rqst->rq_iov[i].iov_base);
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if (rqst->rq_iov[i].iov_base != smb2_padding)
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kfree(rqst->rq_iov[i].iov_base);
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}
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int
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@ -2528,9 +2529,9 @@ SMB2_close(const unsigned int xid, struct cifs_tcon *tcon,
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return SMB2_close_flags(xid, tcon, persistent_fid, volatile_fid, 0);
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}
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static int
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validate_iov(unsigned int offset, unsigned int buffer_length,
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struct kvec *iov, unsigned int min_buf_size)
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int
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smb2_validate_iov(unsigned int offset, unsigned int buffer_length,
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struct kvec *iov, unsigned int min_buf_size)
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{
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unsigned int smb_len = iov->iov_len;
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char *end_of_smb = smb_len + (char *)iov->iov_base;
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@ -2574,7 +2575,7 @@ validate_and_copy_iov(unsigned int offset, unsigned int buffer_length,
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if (!data)
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return -EINVAL;
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rc = validate_iov(offset, buffer_length, iov, minbufsize);
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rc = smb2_validate_iov(offset, buffer_length, iov, minbufsize);
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if (rc)
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return rc;
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@ -3646,9 +3647,9 @@ SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon,
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goto qdir_exit;
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}
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rc = validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
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le32_to_cpu(rsp->OutputBufferLength), &rsp_iov,
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info_buf_size);
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rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
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le32_to_cpu(rsp->OutputBufferLength), &rsp_iov,
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info_buf_size);
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if (rc)
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goto qdir_exit;
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@ -3950,9 +3951,9 @@ SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon,
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return rc;
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}
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static void
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copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info *pfs_inf,
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struct kstatfs *kst)
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void
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smb2_copy_fs_info_to_kstatfs(struct smb2_fs_full_size_info *pfs_inf,
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struct kstatfs *kst)
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{
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kst->f_bsize = le32_to_cpu(pfs_inf->BytesPerSector) *
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le32_to_cpu(pfs_inf->SectorsPerAllocationUnit);
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@ -4054,9 +4055,9 @@ SMB311_posix_qfs_info(const unsigned int xid, struct cifs_tcon *tcon,
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info = (FILE_SYSTEM_POSIX_INFO *)(
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le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
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rc = validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
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le32_to_cpu(rsp->OutputBufferLength), &rsp_iov,
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sizeof(FILE_SYSTEM_POSIX_INFO));
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rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
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le32_to_cpu(rsp->OutputBufferLength), &rsp_iov,
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sizeof(FILE_SYSTEM_POSIX_INFO));
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if (!rc)
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copy_posix_fs_info_to_kstatfs(info, fsdata);
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@ -4102,11 +4103,11 @@ SMB2_QFS_info(const unsigned int xid, struct cifs_tcon *tcon,
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info = (struct smb2_fs_full_size_info *)(
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le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
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rc = validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
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le32_to_cpu(rsp->OutputBufferLength), &rsp_iov,
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sizeof(struct smb2_fs_full_size_info));
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rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
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le32_to_cpu(rsp->OutputBufferLength), &rsp_iov,
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sizeof(struct smb2_fs_full_size_info));
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if (!rc)
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copy_fs_info_to_kstatfs(info, fsdata);
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smb2_copy_fs_info_to_kstatfs(info, fsdata);
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qfsinf_exit:
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free_rsp_buf(resp_buftype, rsp_iov.iov_base);
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@ -4166,7 +4167,7 @@ SMB2_QFS_attr(const unsigned int xid, struct cifs_tcon *tcon,
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rsp_len = le32_to_cpu(rsp->OutputBufferLength);
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offset = le16_to_cpu(rsp->OutputBufferOffset);
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rc = validate_iov(offset, rsp_len, &rsp_iov, min_len);
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rc = smb2_validate_iov(offset, rsp_len, &rsp_iov, min_len);
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if (rc)
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goto qfsattr_exit;
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@ -153,6 +153,8 @@ struct smb2_transform_hdr {
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*
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*/
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#define COMPOUND_FID 0xFFFFFFFFFFFFFFFFULL
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#define SMB2_ERROR_STRUCTURE_SIZE2 cpu_to_le16(9)
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struct smb2_err_rsp {
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@ -1373,4 +1375,6 @@ struct smb2_file_eof_info { /* encoding of request for level 10 */
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__le64 EndOfFile; /* new end of file value */
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} __packed; /* level 20 Set */
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extern char smb2_padding[7];
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#endif /* _SMB2PDU_H */
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@ -229,6 +229,12 @@ extern int smb3_validate_negotiate(const unsigned int, struct cifs_tcon *);
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extern enum securityEnum smb2_select_sectype(struct TCP_Server_Info *,
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enum securityEnum);
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extern int smb3_encryption_required(const struct cifs_tcon *tcon);
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extern int smb2_validate_iov(unsigned int offset, unsigned int buffer_length,
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struct kvec *iov, unsigned int min_buf_size);
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extern void smb2_copy_fs_info_to_kstatfs(
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struct smb2_fs_full_size_info *pfs_inf,
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struct kstatfs *kst);
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extern int smb311_crypto_shash_allocate(struct TCP_Server_Info *server);
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extern int smb311_update_preauth_hash(struct cifs_ses *ses,
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struct kvec *iov, int nvec);
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