diff options
Diffstat (limited to 'fs/cifs/smb2ops.c')
| -rw-r--r-- | fs/cifs/smb2ops.c | 71 |
1 files changed, 60 insertions, 11 deletions
diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c index 0011e6bdaa9a..a71efe297244 100644 --- a/fs/cifs/smb2ops.c +++ b/fs/cifs/smb2ops.c @@ -151,13 +151,7 @@ smb2_get_credits_field(struct TCP_Server_Info *server, const int optype) static unsigned int smb2_get_credits(struct mid_q_entry *mid) { - struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)mid->resp_buf; - - if (mid->mid_state == MID_RESPONSE_RECEIVED - || mid->mid_state == MID_RESPONSE_MALFORMED) - return le16_to_cpu(shdr->CreditRequest); - - return 0; + return mid->credits_received; } static int @@ -668,6 +662,11 @@ int open_shroot(unsigned int xid, struct cifs_tcon *tcon, struct cifs_fid *pfid) if (smb3_encryption_required(tcon)) flags |= CIFS_TRANSFORM_REQ; + if (!server->ops->new_lease_key) + return -EIO; + + server->ops->new_lease_key(pfid); + memset(rqst, 0, sizeof(rqst)); resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER; memset(rsp_iov, 0, sizeof(rsp_iov)); @@ -735,6 +734,7 @@ int open_shroot(unsigned int xid, struct cifs_tcon *tcon, struct cifs_fid *pfid) /* close extra handle outside of crit sec */ SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); } + rc = 0; goto oshr_free; } @@ -1084,7 +1084,8 @@ smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon, void *data[1]; struct smb2_file_full_ea_info *ea = NULL; struct kvec close_iov[1]; - int rc; + struct smb2_query_info_rsp *rsp; + int rc, used_len = 0; if (smb3_encryption_required(tcon)) flags |= CIFS_TRANSFORM_REQ; @@ -1107,6 +1108,38 @@ smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon, cifs_sb); if (rc == -ENODATA) goto sea_exit; + } else { + /* If we are adding a attribute we should first check + * if there will be enough space available to store + * the new EA. If not we should not add it since we + * would not be able to even read the EAs back. + */ + rc = smb2_query_info_compound(xid, tcon, utf16_path, + FILE_READ_EA, + FILE_FULL_EA_INFORMATION, + SMB2_O_INFO_FILE, + CIFSMaxBufSize - + MAX_SMB2_CREATE_RESPONSE_SIZE - + MAX_SMB2_CLOSE_RESPONSE_SIZE, + &rsp_iov[1], &resp_buftype[1], cifs_sb); + if (rc == 0) { + rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base; + used_len = le32_to_cpu(rsp->OutputBufferLength); + } + free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); + resp_buftype[1] = CIFS_NO_BUFFER; + memset(&rsp_iov[1], 0, sizeof(rsp_iov[1])); + rc = 0; + + /* Use a fudge factor of 256 bytes in case we collide + * with a different set_EAs command. + */ + if(CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE - + MAX_SMB2_CLOSE_RESPONSE_SIZE - 256 < + used_len + ea_name_len + ea_value_len + 1) { + rc = -ENOSPC; + goto sea_exit; + } } } @@ -1455,7 +1488,9 @@ smb2_ioctl_query_info(const unsigned int xid, COMPOUND_FID, COMPOUND_FID, qi.info_type, true, buffer, qi.output_buffer_length, - CIFSMaxBufSize); + CIFSMaxBufSize - + MAX_SMB2_CREATE_RESPONSE_SIZE - + MAX_SMB2_CLOSE_RESPONSE_SIZE); } } else if (qi.flags == PASSTHRU_QUERY_INFO) { memset(&qi_iov, 0, sizeof(qi_iov)); @@ -2546,7 +2581,10 @@ smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon, rc = SMB2_ioctl_init(tcon, &rqst[1], fid.persistent_fid, fid.volatile_fid, FSCTL_GET_REPARSE_POINT, - true /* is_fctl */, NULL, 0, CIFSMaxBufSize); + true /* is_fctl */, NULL, 0, + CIFSMaxBufSize - + MAX_SMB2_CREATE_RESPONSE_SIZE - + MAX_SMB2_CLOSE_RESPONSE_SIZE); if (rc) goto querty_exit; @@ -2850,6 +2888,11 @@ static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon, trace_smb3_zero_enter(xid, cfile->fid.persistent_fid, tcon->tid, ses->Suid, offset, len); + /* + * We zero the range through ioctl, so we need remove the page caches + * first, otherwise the data may be inconsistent with the server. + */ + truncate_pagecache_range(inode, offset, offset + len - 1); /* if file not oplocked can't be sure whether asking to extend size */ if (!CIFS_CACHE_READ(cifsi)) @@ -2918,6 +2961,12 @@ static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon, return rc; } + /* + * We implement the punch hole through ioctl, so we need remove the page + * caches first, otherwise the data may be inconsistent with the server. + */ + truncate_pagecache_range(inode, offset, offset + len - 1); + cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len); fsctl_buf.FileOffset = cpu_to_le64(offset); @@ -3140,7 +3189,7 @@ static int smb3_fiemap(struct cifs_tcon *tcon, if (rc) goto out; - if (out_data_len < sizeof(struct file_allocated_range_buffer)) { + if (out_data_len && out_data_len < sizeof(struct file_allocated_range_buffer)) { rc = -EINVAL; goto out; } |