From 2096243885ee34b78cb57ce835e07c8536a67d2a Mon Sep 17 00:00:00 2001 From: Steve French Date: Wed, 21 Sep 2005 22:05:57 -0700 Subject: [CIFS] Add support for legacy servers part nine. statfs (df and du) is now functional, and the length check is fixed so readdir does not throw a warning message when windows me messes up the response to FindFirst of an empty dir (with only . and ..). Signed-off-by: Steve French (sfrench@us.ibm.com) --- fs/cifs/CHANGES | 3 +- fs/cifs/cifsfs.c | 4 +++ fs/cifs/cifspdu.h | 8 +++++ fs/cifs/cifsproto.h | 2 ++ fs/cifs/cifssmb.c | 95 +++++++++++++++++++++++++++++++++++++++++++++++++---- fs/cifs/misc.c | 3 +- fs/cifs/netmisc.c | 2 +- 7 files changed, 107 insertions(+), 10 deletions(-) (limited to 'fs/cifs') diff --git a/fs/cifs/CHANGES b/fs/cifs/CHANGES index 47ae68b51847c3..661b45906d0980 100644 --- a/fs/cifs/CHANGES +++ b/fs/cifs/CHANGES @@ -3,7 +3,8 @@ Version 1.37 Fix readdir caching when unlink removes file in current search buffer, and this is followed by a rewind search to just before the deleted entry. Do not attempt to set ctime unless atime and/or mtime change requested -(most servers throw it away anyway). +(most servers throw it away anyway). Fix length check of received smbs +to be more accurate. Version 1.36 ------------ diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c index f738c8b19e3b19..1f97d39100ee51 100644 --- a/fs/cifs/cifsfs.c +++ b/fs/cifs/cifsfs.c @@ -205,6 +205,10 @@ cifs_statfs(struct super_block *sb, struct kstatfs *buf) #endif /* CIFS_EXPERIMENTAL */ rc = CIFSSMBQFSInfo(xid, pTcon, buf); + /* Old Windows servers do not support level 103, retry with level + one if old server failed the previous call */ + if(rc) + rc = SMBOldQFSInfo(xid, pTcon, buf); /* int f_type; __fsid_t f_fsid; diff --git a/fs/cifs/cifspdu.h b/fs/cifs/cifspdu.h index cf466595b0d400..3fa37790bea271 100644 --- a/fs/cifs/cifspdu.h +++ b/fs/cifs/cifspdu.h @@ -1683,6 +1683,14 @@ typedef struct { __le32 BytesPerSector; } FILE_SYSTEM_INFO; /* size info, level 0x103 */ +typedef struct { + __le32 fsid; + __le32 SectorsPerAllocationUnit; + __le32 TotalAllocationUnits; + __le32 FreeAllocationUnits; + __le16 BytesPerSector; +} FILE_SYSTEM_ALLOC_INFO; + typedef struct { __le16 MajorVersionNumber; __le16 MinorVersionNumber; diff --git a/fs/cifs/cifsproto.h b/fs/cifs/cifsproto.h index 6943f7c6de0846..0bace385e97a88 100644 --- a/fs/cifs/cifsproto.h +++ b/fs/cifs/cifsproto.h @@ -133,6 +133,8 @@ extern int get_dfs_path(int xid, struct cifsSesInfo *pSesInfo, int remap); extern int CIFSSMBQFSInfo(const int xid, struct cifsTconInfo *tcon, struct kstatfs *FSData); +extern int SMBOldQFSInfo(const int xid, struct cifsTconInfo *tcon, + struct kstatfs *FSData); extern int CIFSSMBSetFSUnixInfo(const int xid, struct cifsTconInfo *tcon, __u64 cap); diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c index f72a61df3c68cb..daf717e6b6eb24 100644 --- a/fs/cifs/cifssmb.c +++ b/fs/cifs/cifssmb.c @@ -3215,6 +3215,92 @@ GetDFSRefExit: return rc; } +/* Query File System Info such as free space to old servers such as Win 9x */ +int +SMBOldQFSInfo(const int xid, struct cifsTconInfo *tcon, struct kstatfs *FSData) +{ +/* level 0x01 SMB_QUERY_FILE_SYSTEM_INFO */ + TRANSACTION2_QFSI_REQ *pSMB = NULL; + TRANSACTION2_QFSI_RSP *pSMBr = NULL; + FILE_SYSTEM_ALLOC_INFO *response_data; + int rc = 0; + int bytes_returned = 0; + __u16 params, byte_count; + + cFYI(1, ("OldQFSInfo")); +oldQFSInfoRetry: + rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB, + (void **) &pSMBr); + if (rc) + return rc; + rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB, + (void **) &pSMBr); + if (rc) + return rc; + + params = 2; /* level */ + pSMB->TotalDataCount = 0; + pSMB->MaxParameterCount = cpu_to_le16(2); + pSMB->MaxDataCount = cpu_to_le16(1000); + pSMB->MaxSetupCount = 0; + pSMB->Reserved = 0; + pSMB->Flags = 0; + pSMB->Timeout = 0; + pSMB->Reserved2 = 0; + byte_count = params + 1 /* pad */ ; + pSMB->TotalParameterCount = cpu_to_le16(params); + pSMB->ParameterCount = pSMB->TotalParameterCount; + pSMB->ParameterOffset = cpu_to_le16(offsetof( + struct smb_com_transaction2_qfsi_req, InformationLevel) - 4); + pSMB->DataCount = 0; + pSMB->DataOffset = 0; + pSMB->SetupCount = 1; + pSMB->Reserved3 = 0; + pSMB->SubCommand = cpu_to_le16(TRANS2_QUERY_FS_INFORMATION); + pSMB->InformationLevel = cpu_to_le16(SMB_INFO_ALLOCATION); + pSMB->hdr.smb_buf_length += byte_count; + pSMB->ByteCount = cpu_to_le16(byte_count); + + rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB, + (struct smb_hdr *) pSMBr, &bytes_returned, 0); + if (rc) { + cFYI(1, ("Send error in QFSInfo = %d", rc)); + } else { /* decode response */ + rc = validate_t2((struct smb_t2_rsp *)pSMBr); + + if (rc || (pSMBr->ByteCount < 18)) + rc = -EIO; /* bad smb */ + else { + __u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset); + cFYI(1,("qfsinf resp BCC: %d Offset %d", + pSMBr->ByteCount, data_offset)); + + response_data = + (FILE_SYSTEM_ALLOC_INFO *) + (((char *) &pSMBr->hdr.Protocol) + data_offset); + FSData->f_bsize = + le16_to_cpu(response_data->BytesPerSector) * + le32_to_cpu(response_data-> + SectorsPerAllocationUnit); + FSData->f_blocks = + le32_to_cpu(response_data->TotalAllocationUnits); + FSData->f_bfree = FSData->f_bavail = + le32_to_cpu(response_data->FreeAllocationUnits); + cFYI(1, + ("Blocks: %lld Free: %lld Block size %ld", + (unsigned long long)FSData->f_blocks, + (unsigned long long)FSData->f_bfree, + FSData->f_bsize)); + } + } + cifs_buf_release(pSMB); + + if (rc == -EAGAIN) + goto oldQFSInfoRetry; + + return rc; +} + int CIFSSMBQFSInfo(const int xid, struct cifsTconInfo *tcon, struct kstatfs *FSData) { @@ -3236,7 +3322,7 @@ QFSInfoRetry: params = 2; /* level */ pSMB->TotalDataCount = 0; pSMB->MaxParameterCount = cpu_to_le16(2); - pSMB->MaxDataCount = cpu_to_le16(1000); /* BB find exact max SMB PDU from sess structure BB */ + pSMB->MaxDataCount = cpu_to_le16(1000); pSMB->MaxSetupCount = 0; pSMB->Reserved = 0; pSMB->Flags = 0; @@ -3259,17 +3345,14 @@ QFSInfoRetry: rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB, (struct smb_hdr *) pSMBr, &bytes_returned, 0); if (rc) { - cERROR(1, ("Send error in QFSInfo = %d", rc)); + cFYI(1, ("Send error in QFSInfo = %d", rc)); } else { /* decode response */ rc = validate_t2((struct smb_t2_rsp *)pSMBr); - if (rc || (pSMBr->ByteCount < 24)) /* BB alsO CHEck enough total bytes returned */ + if (rc || (pSMBr->ByteCount < 24)) rc = -EIO; /* bad smb */ else { __u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset); - cFYI(1, - ("Decoding qfsinfo response. BCC: %d Offset %d", - pSMBr->ByteCount, data_offset)); response_data = (FILE_SYSTEM_INFO diff --git a/fs/cifs/misc.c b/fs/cifs/misc.c index fafbdbfa63a138..26b35b55f31b99 100644 --- a/fs/cifs/misc.c +++ b/fs/cifs/misc.c @@ -450,13 +450,12 @@ checkSMB(struct smb_hdr *smb, __u16 mid, int length) if ((4 + len != smbCalcSize(smb)) || (4 + len != (unsigned int)length)) { - return 0; - } else { cERROR(1, ("smbCalcSize %x ", smbCalcSize(smb))); cERROR(1, ("bad smb size detected. The Mid=%d", smb->Mid)); return 1; } + return 0; } int is_valid_oplock_break(struct smb_hdr *buf) diff --git a/fs/cifs/netmisc.c b/fs/cifs/netmisc.c index 873b812c0f408e..32efa32774d22a 100644 --- a/fs/cifs/netmisc.c +++ b/fs/cifs/netmisc.c @@ -868,7 +868,7 @@ unsigned int smbCalcSize(struct smb_hdr *ptr) { return (sizeof (struct smb_hdr) + (2 * ptr->WordCount) + - BCC(ptr)); + 2 /* size of the bcc field itself */ + BCC(ptr)); } /* The following are taken from fs/ntfs/util.c */ -- cgit 1.2.3-korg