diff --git a/fs/cifs/cifs_fs_sb.h b/fs/cifs/cifs_fs_sb.h index 7852cd677051..ac51cd2d33ae 100644 --- a/fs/cifs/cifs_fs_sb.h +++ b/fs/cifs/cifs_fs_sb.h @@ -40,6 +40,7 @@ #define CIFS_MOUNT_FSCACHE 0x8000 /* local caching enabled */ #define CIFS_MOUNT_MF_SYMLINKS 0x10000 /* Minshall+French Symlinks enabled */ #define CIFS_MOUNT_MULTIUSER 0x20000 /* multiuser mount */ +#define CIFS_MOUNT_STRICT_IO 0x40000 /* strict cache mode */ struct cifs_sb_info { struct rb_root tlink_tree; diff --git a/fs/cifs/cifs_unicode.c b/fs/cifs/cifs_unicode.c index 430f510a1720..fc0fd4fde306 100644 --- a/fs/cifs/cifs_unicode.c +++ b/fs/cifs/cifs_unicode.c @@ -44,10 +44,14 @@ cifs_ucs2_bytes(const __le16 *from, int maxbytes, int charlen, outlen = 0; int maxwords = maxbytes / 2; char tmp[NLS_MAX_CHARSET_SIZE]; + __u16 ftmp; - for (i = 0; i < maxwords && from[i]; i++) { - charlen = codepage->uni2char(le16_to_cpu(from[i]), tmp, - NLS_MAX_CHARSET_SIZE); + for (i = 0; i < maxwords; i++) { + ftmp = get_unaligned_le16(&from[i]); + if (ftmp == 0) + break; + + charlen = codepage->uni2char(ftmp, tmp, NLS_MAX_CHARSET_SIZE); if (charlen > 0) outlen += charlen; else @@ -58,9 +62,9 @@ cifs_ucs2_bytes(const __le16 *from, int maxbytes, } /* - * cifs_mapchar - convert a little-endian char to proper char in codepage + * cifs_mapchar - convert a host-endian char to proper char in codepage * @target - where converted character should be copied - * @src_char - 2 byte little-endian source character + * @src_char - 2 byte host-endian source character * @cp - codepage to which character should be converted * @mapchar - should character be mapped according to mapchars mount option? * @@ -69,7 +73,7 @@ cifs_ucs2_bytes(const __le16 *from, int maxbytes, * enough to hold the result of the conversion (at least NLS_MAX_CHARSET_SIZE). */ static int -cifs_mapchar(char *target, const __le16 src_char, const struct nls_table *cp, +cifs_mapchar(char *target, const __u16 src_char, const struct nls_table *cp, bool mapchar) { int len = 1; @@ -82,7 +86,7 @@ cifs_mapchar(char *target, const __le16 src_char, const struct nls_table *cp, * build_path_from_dentry are modified, as they use slash as * separator. */ - switch (le16_to_cpu(src_char)) { + switch (src_char) { case UNI_COLON: *target = ':'; break; @@ -109,8 +113,7 @@ cifs_mapchar(char *target, const __le16 src_char, const struct nls_table *cp, return len; cp_convert: - len = cp->uni2char(le16_to_cpu(src_char), target, - NLS_MAX_CHARSET_SIZE); + len = cp->uni2char(src_char, target, NLS_MAX_CHARSET_SIZE); if (len <= 0) { *target = '?'; len = 1; @@ -149,6 +152,7 @@ cifs_from_ucs2(char *to, const __le16 *from, int tolen, int fromlen, int nullsize = nls_nullsize(codepage); int fromwords = fromlen / 2; char tmp[NLS_MAX_CHARSET_SIZE]; + __u16 ftmp; /* * because the chars can be of varying widths, we need to take care @@ -158,19 +162,23 @@ cifs_from_ucs2(char *to, const __le16 *from, int tolen, int fromlen, */ safelen = tolen - (NLS_MAX_CHARSET_SIZE + nullsize); - for (i = 0; i < fromwords && from[i]; i++) { + for (i = 0; i < fromwords; i++) { + ftmp = get_unaligned_le16(&from[i]); + if (ftmp == 0) + break; + /* * check to see if converting this character might make the * conversion bleed into the null terminator */ if (outlen >= safelen) { - charlen = cifs_mapchar(tmp, from[i], codepage, mapchar); + charlen = cifs_mapchar(tmp, ftmp, codepage, mapchar); if ((outlen + charlen) > (tolen - nullsize)) break; } /* put converted char into 'to' buffer */ - charlen = cifs_mapchar(&to[outlen], from[i], codepage, mapchar); + charlen = cifs_mapchar(&to[outlen], ftmp, codepage, mapchar); outlen += charlen; } @@ -193,24 +201,21 @@ cifs_strtoUCS(__le16 *to, const char *from, int len, { int charlen; int i; - wchar_t *wchar_to = (wchar_t *)to; /* needed to quiet sparse */ + wchar_t wchar_to; /* needed to quiet sparse */ for (i = 0; len && *from; i++, from += charlen, len -= charlen) { - - /* works for 2.4.0 kernel or later */ - charlen = codepage->char2uni(from, len, &wchar_to[i]); + charlen = codepage->char2uni(from, len, &wchar_to); if (charlen < 1) { - cERROR(1, "strtoUCS: char2uni of %d returned %d", - (int)*from, charlen); + cERROR(1, "strtoUCS: char2uni of 0x%x returned %d", + *from, charlen); /* A question mark */ - to[i] = cpu_to_le16(0x003f); + wchar_to = 0x003f; charlen = 1; - } else - to[i] = cpu_to_le16(wchar_to[i]); - + } + put_unaligned_le16(wchar_to, &to[i]); } - to[i] = 0; + put_unaligned_le16(0, &to[i]); return i; } @@ -252,3 +257,79 @@ cifs_strndup_from_ucs(const char *src, const int maxlen, const bool is_unicode, return dst; } +/* + * Convert 16 bit Unicode pathname to wire format from string in current code + * page. Conversion may involve remapping up the six characters that are + * only legal in POSIX-like OS (if they are present in the string). Path + * names are little endian 16 bit Unicode on the wire + */ +int +cifsConvertToUCS(__le16 *target, const char *source, int maxlen, + const struct nls_table *cp, int mapChars) +{ + int i, j, charlen; + int len_remaining = maxlen; + char src_char; + __u16 temp; + + if (!mapChars) + return cifs_strtoUCS(target, source, PATH_MAX, cp); + + for (i = 0, j = 0; i < maxlen; j++) { + src_char = source[i]; + switch (src_char) { + case 0: + put_unaligned_le16(0, &target[j]); + goto ctoUCS_out; + case ':': + temp = UNI_COLON; + break; + case '*': + temp = UNI_ASTERIK; + break; + case '?': + temp = UNI_QUESTION; + break; + case '<': + temp = UNI_LESSTHAN; + break; + case '>': + temp = UNI_GRTRTHAN; + break; + case '|': + temp = UNI_PIPE; + break; + /* + * FIXME: We can not handle remapping backslash (UNI_SLASH) + * until all the calls to build_path_from_dentry are modified, + * as they use backslash as separator. + */ + default: + charlen = cp->char2uni(source+i, len_remaining, + &temp); + /* + * if no match, use question mark, which at least in + * some cases serves as wild card + */ + if (charlen < 1) { + temp = 0x003f; + charlen = 1; + } + len_remaining -= charlen; + /* + * character may take more than one byte in the source + * string, but will take exactly two bytes in the + * target string + */ + i += charlen; + continue; + } + put_unaligned_le16(temp, &target[j]); + i++; /* move to next char in source string */ + len_remaining--; + } + +ctoUCS_out: + return i; +} + diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c index 99d777a03dd0..a8323f1dc1c4 100644 --- a/fs/cifs/cifsfs.c +++ b/fs/cifs/cifsfs.c @@ -733,6 +733,25 @@ const struct file_operations cifs_file_ops = { .setlease = cifs_setlease, }; +const struct file_operations cifs_file_strict_ops = { + .read = do_sync_read, + .write = do_sync_write, + .aio_read = cifs_strict_readv, + .aio_write = cifs_file_aio_write, + .open = cifs_open, + .release = cifs_close, + .lock = cifs_lock, + .fsync = cifs_strict_fsync, + .flush = cifs_flush, + .mmap = cifs_file_strict_mmap, + .splice_read = generic_file_splice_read, + .llseek = cifs_llseek, +#ifdef CONFIG_CIFS_POSIX + .unlocked_ioctl = cifs_ioctl, +#endif /* CONFIG_CIFS_POSIX */ + .setlease = cifs_setlease, +}; + const struct file_operations cifs_file_direct_ops = { /* no aio, no readv - BB reevaluate whether they can be done with directio, no cache */ @@ -751,6 +770,7 @@ const struct file_operations cifs_file_direct_ops = { .llseek = cifs_llseek, .setlease = cifs_setlease, }; + const struct file_operations cifs_file_nobrl_ops = { .read = do_sync_read, .write = do_sync_write, @@ -769,6 +789,24 @@ const struct file_operations cifs_file_nobrl_ops = { .setlease = cifs_setlease, }; +const struct file_operations cifs_file_strict_nobrl_ops = { + .read = do_sync_read, + .write = do_sync_write, + .aio_read = cifs_strict_readv, + .aio_write = cifs_file_aio_write, + .open = cifs_open, + .release = cifs_close, + .fsync = cifs_strict_fsync, + .flush = cifs_flush, + .mmap = cifs_file_strict_mmap, + .splice_read = generic_file_splice_read, + .llseek = cifs_llseek, +#ifdef CONFIG_CIFS_POSIX + .unlocked_ioctl = cifs_ioctl, +#endif /* CONFIG_CIFS_POSIX */ + .setlease = cifs_setlease, +}; + const struct file_operations cifs_file_direct_nobrl_ops = { /* no mmap, no aio, no readv - BB reevaluate whether they can be done with directio, no cache */ diff --git a/fs/cifs/cifsfs.h b/fs/cifs/cifsfs.h index 4739a531cded..f23206d46531 100644 --- a/fs/cifs/cifsfs.h +++ b/fs/cifs/cifsfs.h @@ -61,6 +61,7 @@ extern int cifs_rename(struct inode *, struct dentry *, struct inode *, struct dentry *); extern int cifs_revalidate_file(struct file *filp); extern int cifs_revalidate_dentry(struct dentry *); +extern void cifs_invalidate_mapping(struct inode *inode); extern int cifs_getattr(struct vfsmount *, struct dentry *, struct kstat *); extern int cifs_setattr(struct dentry *, struct iattr *); @@ -72,19 +73,25 @@ extern const struct inode_operations cifs_dfs_referral_inode_operations; /* Functions related to files and directories */ extern const struct file_operations cifs_file_ops; extern const struct file_operations cifs_file_direct_ops; /* if directio mnt */ -extern const struct file_operations cifs_file_nobrl_ops; -extern const struct file_operations cifs_file_direct_nobrl_ops; /* no brlocks */ +extern const struct file_operations cifs_file_strict_ops; /* if strictio mnt */ +extern const struct file_operations cifs_file_nobrl_ops; /* no brlocks */ +extern const struct file_operations cifs_file_direct_nobrl_ops; +extern const struct file_operations cifs_file_strict_nobrl_ops; extern int cifs_open(struct inode *inode, struct file *file); extern int cifs_close(struct inode *inode, struct file *file); extern int cifs_closedir(struct inode *inode, struct file *file); extern ssize_t cifs_user_read(struct file *file, char __user *read_data, - size_t read_size, loff_t *poffset); + size_t read_size, loff_t *poffset); +extern ssize_t cifs_strict_readv(struct kiocb *iocb, const struct iovec *iov, + unsigned long nr_segs, loff_t pos); extern ssize_t cifs_user_write(struct file *file, const char __user *write_data, size_t write_size, loff_t *poffset); extern int cifs_lock(struct file *, int, struct file_lock *); extern int cifs_fsync(struct file *, int); +extern int cifs_strict_fsync(struct file *, int); extern int cifs_flush(struct file *, fl_owner_t id); extern int cifs_file_mmap(struct file * , struct vm_area_struct *); +extern int cifs_file_strict_mmap(struct file * , struct vm_area_struct *); extern const struct file_operations cifs_dir_ops; extern int cifs_dir_open(struct inode *inode, struct file *file); extern int cifs_readdir(struct file *file, void *direntry, filldir_t filldir); diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h index 571132c95231..5bfb75346cb0 100644 --- a/fs/cifs/cifsglob.h +++ b/fs/cifs/cifsglob.h @@ -161,6 +161,7 @@ struct TCP_Server_Info { int srv_count; /* reference counter */ /* 15 character server name + 0x20 16th byte indicating type = srv */ char server_RFC1001_name[RFC1001_NAME_LEN_WITH_NULL]; + enum statusEnum tcpStatus; /* what we think the status is */ char *hostname; /* hostname portion of UNC string */ struct socket *ssocket; struct sockaddr_storage dstaddr; @@ -168,25 +169,16 @@ struct TCP_Server_Info { wait_queue_head_t response_q; wait_queue_head_t request_q; /* if more than maxmpx to srvr must block*/ struct list_head pending_mid_q; - void *Server_NlsInfo; /* BB - placeholder for future NLS info */ - unsigned short server_codepage; /* codepage for the server */ - enum protocolEnum protocolType; - char versionMajor; - char versionMinor; - bool svlocal:1; /* local server or remote */ bool noblocksnd; /* use blocking sendmsg */ bool noautotune; /* do not autotune send buf sizes */ bool tcp_nodelay; atomic_t inFlight; /* number of requests on the wire to server */ -#ifdef CONFIG_CIFS_STATS2 - atomic_t inSend; /* requests trying to send */ - atomic_t num_waiters; /* blocked waiting to get in sendrecv */ -#endif - enum statusEnum tcpStatus; /* what we think the status is */ struct mutex srv_mutex; struct task_struct *tsk; char server_GUID[16]; char secMode; + bool session_estab; /* mark when very first sess is established */ + u16 dialect; /* dialect index that server chose */ enum securityEnum secType; unsigned int maxReq; /* Clients should submit no more */ /* than maxReq distinct unanswered SMBs to the server when using */ @@ -199,8 +191,6 @@ struct TCP_Server_Info { unsigned int max_vcs; /* maximum number of smb sessions, at least those that can be specified uniquely with vcnumbers */ - char sessid[4]; /* unique token id for this session */ - /* (returned on Negotiate */ int capabilities; /* allow selective disabling of caps by smb sess */ int timeAdj; /* Adjust for difference in server time zone in sec */ __u16 CurrentMid; /* multiplex id - rotating counter */ @@ -210,18 +200,20 @@ struct TCP_Server_Info { __u32 sequence_number; /* for signing, protected by srv_mutex */ struct session_key session_key; unsigned long lstrp; /* when we got last response from this server */ - u16 dialect; /* dialect index that server chose */ struct cifs_secmech secmech; /* crypto sec mech functs, descriptors */ /* extended security flavors that server supports */ + bool sec_ntlmssp; /* supports NTLMSSP */ + bool sec_kerberosu2u; /* supports U2U Kerberos */ bool sec_kerberos; /* supports plain Kerberos */ bool sec_mskerberos; /* supports legacy MS Kerberos */ - bool sec_kerberosu2u; /* supports U2U Kerberos */ - bool sec_ntlmssp; /* supports NTLMSSP */ - bool session_estab; /* mark when very first sess is established */ struct delayed_work echo; /* echo ping workqueue job */ #ifdef CONFIG_CIFS_FSCACHE struct fscache_cookie *fscache; /* client index cache cookie */ #endif +#ifdef CONFIG_CIFS_STATS2 + atomic_t inSend; /* requests trying to send */ + atomic_t num_waiters; /* blocked waiting to get in sendrecv */ +#endif }; /* @@ -447,11 +439,11 @@ struct cifsInodeInfo { /* BB add in lists for dirty pages i.e. write caching info for oplock */ struct list_head openFileList; __u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */ - unsigned long time; /* jiffies of last update/check of inode */ - bool clientCanCacheRead:1; /* read oplock */ - bool clientCanCacheAll:1; /* read and writebehind oplock */ - bool delete_pending:1; /* DELETE_ON_CLOSE is set */ - bool invalid_mapping:1; /* pagecache is invalid */ + bool clientCanCacheRead; /* read oplock */ + bool clientCanCacheAll; /* read and writebehind oplock */ + bool delete_pending; /* DELETE_ON_CLOSE is set */ + bool invalid_mapping; /* pagecache is invalid */ + unsigned long time; /* jiffies of last update of inode */ u64 server_eof; /* current file size on server */ u64 uniqueid; /* server inode number */ u64 createtime; /* creation time on server */ diff --git a/fs/cifs/cifspdu.h b/fs/cifs/cifspdu.h index ea205b4fcad2..b5c8cc5d7a7f 100644 --- a/fs/cifs/cifspdu.h +++ b/fs/cifs/cifspdu.h @@ -23,6 +23,7 @@ #define _CIFSPDU_H #include +#include #include "smbfsctl.h" #ifdef CONFIG_CIFS_WEAK_PW_HASH @@ -426,11 +427,49 @@ struct smb_hdr { __u16 Mid; __u8 WordCount; } __attribute__((packed)); -/* given a pointer to an smb_hdr retrieve the value of byte count */ -#define BCC(smb_var) (*(__u16 *)((char *)(smb_var) + sizeof(struct smb_hdr) + (2 * (smb_var)->WordCount))) -#define BCC_LE(smb_var) (*(__le16 *)((char *)(smb_var) + sizeof(struct smb_hdr) + (2 * (smb_var)->WordCount))) + +/* given a pointer to an smb_hdr retrieve a char pointer to the byte count */ +#define BCC(smb_var) ((unsigned char *)(smb_var) + sizeof(struct smb_hdr) + \ + (2 * (smb_var)->WordCount)) + /* given a pointer to an smb_hdr retrieve the pointer to the byte area */ -#define pByteArea(smb_var) ((unsigned char *)(smb_var) + sizeof(struct smb_hdr) + (2 * (smb_var)->WordCount) + 2) +#define pByteArea(smb_var) (BCC(smb_var) + 2) + +/* get the converted ByteCount for a SMB packet and return it */ +static inline __u16 +get_bcc(struct smb_hdr *hdr) +{ + __u16 *bc_ptr = (__u16 *)BCC(hdr); + + return get_unaligned(bc_ptr); +} + +/* get the unconverted ByteCount for a SMB packet and return it */ +static inline __u16 +get_bcc_le(struct smb_hdr *hdr) +{ + __le16 *bc_ptr = (__le16 *)BCC(hdr); + + return get_unaligned_le16(bc_ptr); +} + +/* set the ByteCount for a SMB packet in host-byte order */ +static inline void +put_bcc(__u16 count, struct smb_hdr *hdr) +{ + __u16 *bc_ptr = (__u16 *)BCC(hdr); + + put_unaligned(count, bc_ptr); +} + +/* set the ByteCount for a SMB packet in little-endian */ +static inline void +put_bcc_le(__u16 count, struct smb_hdr *hdr) +{ + __le16 *bc_ptr = (__le16 *)BCC(hdr); + + put_unaligned_le16(count, bc_ptr); +} /* * Computer Name Length (since Netbios name was length 16 with last byte 0x20) diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c index 37113450757b..3106f5e5c633 100644 --- a/fs/cifs/cifssmb.c +++ b/fs/cifs/cifssmb.c @@ -331,37 +331,35 @@ smb_init_no_reconnect(int smb_command, int wct, struct cifsTconInfo *tcon, static int validate_t2(struct smb_t2_rsp *pSMB) { - int rc = -EINVAL; - int total_size; - char *pBCC; + unsigned int total_size; + + /* check for plausible wct */ + if (pSMB->hdr.WordCount < 10) + goto vt2_err; - /* check for plausible wct, bcc and t2 data and parm sizes */ /* check for parm and data offset going beyond end of smb */ - if (pSMB->hdr.WordCount >= 10) { - if ((le16_to_cpu(pSMB->t2_rsp.ParameterOffset) <= 1024) && - (le16_to_cpu(pSMB->t2_rsp.DataOffset) <= 1024)) { - /* check that bcc is at least as big as parms + data */ - /* check that bcc is less than negotiated smb buffer */ - total_size = le16_to_cpu(pSMB->t2_rsp.ParameterCount); - if (total_size < 512) { - total_size += - le16_to_cpu(pSMB->t2_rsp.DataCount); - /* BCC le converted in SendReceive */ - pBCC = (pSMB->hdr.WordCount * 2) + - sizeof(struct smb_hdr) + - (char *)pSMB; - if ((total_size <= (*(u16 *)pBCC)) && - (total_size < - CIFSMaxBufSize+MAX_CIFS_HDR_SIZE)) { - return 0; - } - } - } - } + if (get_unaligned_le16(&pSMB->t2_rsp.ParameterOffset) > 1024 || + get_unaligned_le16(&pSMB->t2_rsp.DataOffset) > 1024) + goto vt2_err; + + /* check that bcc is at least as big as parms + data */ + /* check that bcc is less than negotiated smb buffer */ + total_size = get_unaligned_le16(&pSMB->t2_rsp.ParameterCount); + if (total_size >= 512) + goto vt2_err; + + total_size += get_unaligned_le16(&pSMB->t2_rsp.DataCount); + if (total_size > get_bcc(&pSMB->hdr) || + total_size >= CIFSMaxBufSize + MAX_CIFS_HDR_SIZE) + goto vt2_err; + + return 0; +vt2_err: cifs_dump_mem("Invalid transact2 SMB: ", (char *)pSMB, sizeof(struct smb_t2_rsp) + 16); - return rc; + return -EINVAL; } + int CIFSSMBNegotiate(unsigned int xid, struct cifsSesInfo *ses) { @@ -452,7 +450,6 @@ CIFSSMBNegotiate(unsigned int xid, struct cifsSesInfo *ses) server->maxBuf = min((__u32)le16_to_cpu(rsp->MaxBufSize), (__u32)CIFSMaxBufSize + MAX_CIFS_HDR_SIZE); server->max_vcs = le16_to_cpu(rsp->MaxNumberVcs); - GETU32(server->sessid) = le32_to_cpu(rsp->SessionKey); /* even though we do not use raw we might as well set this accurately, in case we ever find a need for it */ if ((le16_to_cpu(rsp->RawMode) & RAW_ENABLE) == RAW_ENABLE) { @@ -566,7 +563,6 @@ CIFSSMBNegotiate(unsigned int xid, struct cifsSesInfo *ses) (__u32) CIFSMaxBufSize + MAX_CIFS_HDR_SIZE); server->max_rw = le32_to_cpu(pSMBr->MaxRawSize); cFYI(DBG2, "Max buf = %d", ses->server->maxBuf); - GETU32(ses->server->sessid) = le32_to_cpu(pSMBr->SessionKey); server->capabilities = le32_to_cpu(pSMBr->Capabilities); server->timeAdj = (int)(__s16)le16_to_cpu(pSMBr->ServerTimeZone); server->timeAdj *= 60; @@ -737,9 +733,9 @@ CIFSSMBEcho(struct TCP_Server_Info *server) /* set up echo request */ smb->hdr.Tid = cpu_to_le16(0xffff); - smb->hdr.WordCount = cpu_to_le16(1); - smb->EchoCount = cpu_to_le16(1); - smb->ByteCount = cpu_to_le16(1); + smb->hdr.WordCount = 1; + put_unaligned_le16(1, &smb->EchoCount); + put_bcc_le(1, &smb->hdr); smb->Data[0] = 'a'; smb->hdr.smb_buf_length += 3; @@ -5611,7 +5607,7 @@ CIFSSMBQAllEAs(const int xid, struct cifsTconInfo *tcon, } /* make sure list_len doesn't go past end of SMB */ - end_of_smb = (char *)pByteArea(&pSMBr->hdr) + BCC(&pSMBr->hdr); + end_of_smb = (char *)pByteArea(&pSMBr->hdr) + get_bcc(&pSMBr->hdr); if ((char *)ea_response_data + list_len > end_of_smb) { cFYI(1, "EA list appears to go beyond SMB"); rc = -EIO; diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c index 8d4657596301..18d3c7724d6e 100644 --- a/fs/cifs/connect.c +++ b/fs/cifs/connect.c @@ -232,9 +232,8 @@ cifs_reconnect(struct TCP_Server_Info *server) static int check2ndT2(struct smb_hdr *pSMB, unsigned int maxBufSize) { struct smb_t2_rsp *pSMBt; - int total_data_size; - int data_in_this_rsp; int remaining; + __u16 total_data_size, data_in_this_rsp; if (pSMB->Command != SMB_COM_TRANSACTION2) return 0; @@ -248,8 +247,8 @@ static int check2ndT2(struct smb_hdr *pSMB, unsigned int maxBufSize) pSMBt = (struct smb_t2_rsp *)pSMB; - total_data_size = le16_to_cpu(pSMBt->t2_rsp.TotalDataCount); - data_in_this_rsp = le16_to_cpu(pSMBt->t2_rsp.DataCount); + total_data_size = get_unaligned_le16(&pSMBt->t2_rsp.TotalDataCount); + data_in_this_rsp = get_unaligned_le16(&pSMBt->t2_rsp.DataCount); remaining = total_data_size - data_in_this_rsp; @@ -275,21 +274,18 @@ static int coalesce_t2(struct smb_hdr *psecond, struct smb_hdr *pTargetSMB) { struct smb_t2_rsp *pSMB2 = (struct smb_t2_rsp *)psecond; struct smb_t2_rsp *pSMBt = (struct smb_t2_rsp *)pTargetSMB; - int total_data_size; - int total_in_buf; - int remaining; - int total_in_buf2; char *data_area_of_target; char *data_area_of_buf2; - __u16 byte_count; + int remaining; + __u16 byte_count, total_data_size, total_in_buf, total_in_buf2; - total_data_size = le16_to_cpu(pSMBt->t2_rsp.TotalDataCount); + total_data_size = get_unaligned_le16(&pSMBt->t2_rsp.TotalDataCount); - if (total_data_size != le16_to_cpu(pSMB2->t2_rsp.TotalDataCount)) { + if (total_data_size != + get_unaligned_le16(&pSMB2->t2_rsp.TotalDataCount)) cFYI(1, "total data size of primary and secondary t2 differ"); - } - total_in_buf = le16_to_cpu(pSMBt->t2_rsp.DataCount); + total_in_buf = get_unaligned_le16(&pSMBt->t2_rsp.DataCount); remaining = total_data_size - total_in_buf; @@ -299,28 +295,28 @@ static int coalesce_t2(struct smb_hdr *psecond, struct smb_hdr *pTargetSMB) if (remaining == 0) /* nothing to do, ignore */ return 0; - total_in_buf2 = le16_to_cpu(pSMB2->t2_rsp.DataCount); + total_in_buf2 = get_unaligned_le16(&pSMB2->t2_rsp.DataCount); if (remaining < total_in_buf2) { cFYI(1, "transact2 2nd response contains too much data"); } /* find end of first SMB data area */ data_area_of_target = (char *)&pSMBt->hdr.Protocol + - le16_to_cpu(pSMBt->t2_rsp.DataOffset); + get_unaligned_le16(&pSMBt->t2_rsp.DataOffset); /* validate target area */ - data_area_of_buf2 = (char *) &pSMB2->hdr.Protocol + - le16_to_cpu(pSMB2->t2_rsp.DataOffset); + data_area_of_buf2 = (char *)&pSMB2->hdr.Protocol + + get_unaligned_le16(&pSMB2->t2_rsp.DataOffset); data_area_of_target += total_in_buf; /* copy second buffer into end of first buffer */ memcpy(data_area_of_target, data_area_of_buf2, total_in_buf2); total_in_buf += total_in_buf2; - pSMBt->t2_rsp.DataCount = cpu_to_le16(total_in_buf); - byte_count = le16_to_cpu(BCC_LE(pTargetSMB)); + put_unaligned_le16(total_in_buf, &pSMBt->t2_rsp.DataCount); + byte_count = get_bcc_le(pTargetSMB); byte_count += total_in_buf2; - BCC_LE(pTargetSMB) = cpu_to_le16(byte_count); + put_bcc_le(byte_count, pTargetSMB); byte_count = pTargetSMB->smb_buf_length; byte_count += total_in_buf2; @@ -334,7 +330,6 @@ static int coalesce_t2(struct smb_hdr *psecond, struct smb_hdr *pTargetSMB) return 0; /* we are done */ } else /* more responses to go */ return 1; - } static void @@ -2937,8 +2932,8 @@ CIFSTCon(unsigned int xid, struct cifsSesInfo *ses, TCONX_RSP *pSMBr; unsigned char *bcc_ptr; int rc = 0; - int length, bytes_left; - __u16 count; + int length; + __u16 bytes_left, count; if (ses == NULL) return -EIO; @@ -3032,7 +3027,7 @@ CIFSTCon(unsigned int xid, struct cifsSesInfo *ses, tcon->need_reconnect = false; tcon->tid = smb_buffer_response->Tid; bcc_ptr = pByteArea(smb_buffer_response); - bytes_left = BCC(smb_buffer_response); + bytes_left = get_bcc(smb_buffer_response); length = strnlen(bcc_ptr, bytes_left - 2); if (smb_buffer->Flags2 & SMBFLG2_UNICODE) is_unicode = true; diff --git a/fs/cifs/file.c b/fs/cifs/file.c index bd2a028af833..d7d65a70678e 100644 --- a/fs/cifs/file.c +++ b/fs/cifs/file.c @@ -287,6 +287,7 @@ void cifsFileInfo_put(struct cifsFileInfo *cifs_file) struct inode *inode = cifs_file->dentry->d_inode; struct cifsTconInfo *tcon = tlink_tcon(cifs_file->tlink); struct cifsInodeInfo *cifsi = CIFS_I(inode); + struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); struct cifsLockInfo *li, *tmp; spin_lock(&cifs_file_list_lock); @@ -302,6 +303,13 @@ void cifsFileInfo_put(struct cifsFileInfo *cifs_file) if (list_empty(&cifsi->openFileList)) { cFYI(1, "closing last open instance for inode %p", cifs_file->dentry->d_inode); + + /* in strict cache mode we need invalidate mapping on the last + close because it may cause a error when we open this file + again and get at least level II oplock */ + if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO) + CIFS_I(inode)->invalid_mapping = true; + cifs_set_oplock_level(cifsi, 0); } spin_unlock(&cifs_file_list_lock); @@ -1520,27 +1528,47 @@ static int cifs_write_end(struct file *file, struct address_space *mapping, return rc; } -int cifs_fsync(struct file *file, int datasync) +int cifs_strict_fsync(struct file *file, int datasync) { int xid; int rc = 0; struct cifsTconInfo *tcon; struct cifsFileInfo *smbfile = file->private_data; struct inode *inode = file->f_path.dentry->d_inode; + struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); xid = GetXid(); cFYI(1, "Sync file - name: %s datasync: 0x%x", file->f_path.dentry->d_name.name, datasync); - rc = filemap_write_and_wait(inode->i_mapping); - if (rc == 0) { - struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); + if (!CIFS_I(inode)->clientCanCacheRead) + cifs_invalidate_mapping(inode); - tcon = tlink_tcon(smbfile->tlink); - if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC)) - rc = CIFSSMBFlush(xid, tcon, smbfile->netfid); - } + tcon = tlink_tcon(smbfile->tlink); + if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC)) + rc = CIFSSMBFlush(xid, tcon, smbfile->netfid); + + FreeXid(xid); + return rc; +} + +int cifs_fsync(struct file *file, int datasync) +{ + int xid; + int rc = 0; + struct cifsTconInfo *tcon; + struct cifsFileInfo *smbfile = file->private_data; + struct cifs_sb_info *cifs_sb = CIFS_SB(file->f_path.dentry->d_sb); + + xid = GetXid(); + + cFYI(1, "Sync file - name: %s datasync: 0x%x", + file->f_path.dentry->d_name.name, datasync); + + tcon = tlink_tcon(smbfile->tlink); + if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC)) + rc = CIFSSMBFlush(xid, tcon, smbfile->netfid); FreeXid(xid); return rc; @@ -1591,42 +1619,42 @@ int cifs_flush(struct file *file, fl_owner_t id) return rc; } -ssize_t cifs_user_read(struct file *file, char __user *read_data, - size_t read_size, loff_t *poffset) +static ssize_t +cifs_iovec_read(struct file *file, const struct iovec *iov, + unsigned long nr_segs, loff_t *poffset) { - int rc = -EACCES; - unsigned int bytes_read = 0; - unsigned int total_read = 0; - unsigned int current_read_size; + int rc; + int xid; + unsigned int total_read, bytes_read = 0; + size_t len, cur_len; + int iov_offset = 0; struct cifs_sb_info *cifs_sb; struct cifsTconInfo *pTcon; - int xid; struct cifsFileInfo *open_file; - char *smb_read_data; - char __user *current_offset; struct smb_com_read_rsp *pSMBr; + char *read_data; + + if (!nr_segs) + return 0; + + len = iov_length(iov, nr_segs); + if (!len) + return 0; xid = GetXid(); cifs_sb = CIFS_SB(file->f_path.dentry->d_sb); - if (file->private_data == NULL) { - rc = -EBADF; - FreeXid(xid); - return rc; - } open_file = file->private_data; pTcon = tlink_tcon(open_file->tlink); if ((file->f_flags & O_ACCMODE) == O_WRONLY) cFYI(1, "attempting read on write only file instance"); - for (total_read = 0, current_offset = read_data; - read_size > total_read; - total_read += bytes_read, current_offset += bytes_read) { - current_read_size = min_t(const int, read_size - total_read, - cifs_sb->rsize); + for (total_read = 0; total_read < len; total_read += bytes_read) { + cur_len = min_t(const size_t, len - total_read, cifs_sb->rsize); rc = -EAGAIN; - smb_read_data = NULL; + read_data = NULL; + while (rc == -EAGAIN) { int buf_type = CIFS_NO_BUFFER; if (open_file->invalidHandle) { @@ -1634,27 +1662,25 @@ ssize_t cifs_user_read(struct file *file, char __user *read_data, if (rc != 0) break; } - rc = CIFSSMBRead(xid, pTcon, - open_file->netfid, - current_read_size, *poffset, - &bytes_read, &smb_read_data, - &buf_type); - pSMBr = (struct smb_com_read_rsp *)smb_read_data; - if (smb_read_data) { - if (copy_to_user(current_offset, - smb_read_data + - 4 /* RFC1001 length field */ + - le16_to_cpu(pSMBr->DataOffset), - bytes_read)) + rc = CIFSSMBRead(xid, pTcon, open_file->netfid, + cur_len, *poffset, &bytes_read, + &read_data, &buf_type); + pSMBr = (struct smb_com_read_rsp *)read_data; + if (read_data) { + char *data_offset = read_data + 4 + + le16_to_cpu(pSMBr->DataOffset); + if (memcpy_toiovecend(iov, data_offset, + iov_offset, bytes_read)) rc = -EFAULT; - if (buf_type == CIFS_SMALL_BUFFER) - cifs_small_buf_release(smb_read_data); + cifs_small_buf_release(read_data); else if (buf_type == CIFS_LARGE_BUFFER) - cifs_buf_release(smb_read_data); - smb_read_data = NULL; + cifs_buf_release(read_data); + read_data = NULL; + iov_offset += bytes_read; } } + if (rc || (bytes_read == 0)) { if (total_read) { break; @@ -1667,13 +1693,57 @@ ssize_t cifs_user_read(struct file *file, char __user *read_data, *poffset += bytes_read; } } + FreeXid(xid); return total_read; } +ssize_t cifs_user_read(struct file *file, char __user *read_data, + size_t read_size, loff_t *poffset) +{ + struct iovec iov; + iov.iov_base = read_data; + iov.iov_len = read_size; + + return cifs_iovec_read(file, &iov, 1, poffset); +} + +static ssize_t cifs_user_readv(struct kiocb *iocb, const struct iovec *iov, + unsigned long nr_segs, loff_t pos) +{ + ssize_t read; + + read = cifs_iovec_read(iocb->ki_filp, iov, nr_segs, &pos); + if (read > 0) + iocb->ki_pos = pos; + + return read; +} + +ssize_t cifs_strict_readv(struct kiocb *iocb, const struct iovec *iov, + unsigned long nr_segs, loff_t pos) +{ + struct inode *inode; + + inode = iocb->ki_filp->f_path.dentry->d_inode; + + if (CIFS_I(inode)->clientCanCacheRead) + return generic_file_aio_read(iocb, iov, nr_segs, pos); + + /* + * In strict cache mode we need to read from the server all the time + * if we don't have level II oplock because the server can delay mtime + * change - so we can't make a decision about inode invalidating. + * And we can also fail with pagereading if there are mandatory locks + * on pages affected by this read but not on the region from pos to + * pos+len-1. + */ + + return cifs_user_readv(iocb, iov, nr_segs, pos); +} static ssize_t cifs_read(struct file *file, char *read_data, size_t read_size, - loff_t *poffset) + loff_t *poffset) { int rc = -EACCES; unsigned int bytes_read = 0; @@ -1741,6 +1811,21 @@ static ssize_t cifs_read(struct file *file, char *read_data, size_t read_size, return total_read; } +int cifs_file_strict_mmap(struct file *file, struct vm_area_struct *vma) +{ + int rc, xid; + struct inode *inode = file->f_path.dentry->d_inode; + + xid = GetXid(); + + if (!CIFS_I(inode)->clientCanCacheRead) + cifs_invalidate_mapping(inode); + + rc = generic_file_mmap(file, vma); + FreeXid(xid); + return rc; +} + int cifs_file_mmap(struct file *file, struct vm_area_struct *vma) { int rc, xid; diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c index 6c9ee8014ff0..8852470b4fbb 100644 --- a/fs/cifs/inode.c +++ b/fs/cifs/inode.c @@ -44,13 +44,17 @@ static void cifs_set_ops(struct inode *inode) inode->i_fop = &cifs_file_direct_nobrl_ops; else inode->i_fop = &cifs_file_direct_ops; + } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO) { + if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) + inode->i_fop = &cifs_file_strict_nobrl_ops; + else + inode->i_fop = &cifs_file_strict_ops; } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) inode->i_fop = &cifs_file_nobrl_ops; else { /* not direct, send byte range locks */ inode->i_fop = &cifs_file_ops; } - /* check if server can support readpages */ if (cifs_sb_master_tcon(cifs_sb)->ses->server->maxBuf < PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE) @@ -1679,7 +1683,7 @@ cifs_inode_needs_reval(struct inode *inode) /* * Zap the cache. Called when invalid_mapping flag is set. */ -static void +void cifs_invalidate_mapping(struct inode *inode) { int rc; diff --git a/fs/cifs/misc.c b/fs/cifs/misc.c index 09bfcf08a90f..a09e077ba925 100644 --- a/fs/cifs/misc.c +++ b/fs/cifs/misc.c @@ -637,77 +637,6 @@ dump_smb(struct smb_hdr *smb_buf, int smb_buf_length) return; } -/* Convert 16 bit Unicode pathname to wire format from string in current code - page. Conversion may involve remapping up the seven characters that are - only legal in POSIX-like OS (if they are present in the string). Path - names are little endian 16 bit Unicode on the wire */ -int -cifsConvertToUCS(__le16 *target, const char *source, int maxlen, - const struct nls_table *cp, int mapChars) -{ - int i, j, charlen; - int len_remaining = maxlen; - char src_char; - __u16 temp; - - if (!mapChars) - return cifs_strtoUCS(target, source, PATH_MAX, cp); - - for (i = 0, j = 0; i < maxlen; j++) { - src_char = source[i]; - switch (src_char) { - case 0: - target[j] = 0; - goto ctoUCS_out; - case ':': - target[j] = cpu_to_le16(UNI_COLON); - break; - case '*': - target[j] = cpu_to_le16(UNI_ASTERIK); - break; - case '?': - target[j] = cpu_to_le16(UNI_QUESTION); - break; - case '<': - target[j] = cpu_to_le16(UNI_LESSTHAN); - break; - case '>': - target[j] = cpu_to_le16(UNI_GRTRTHAN); - break; - case '|': - target[j] = cpu_to_le16(UNI_PIPE); - break; - /* BB We can not handle remapping slash until - all the calls to build_path_from_dentry - are modified, as they use slash as separator BB */ - /* case '\\': - target[j] = cpu_to_le16(UNI_SLASH); - break;*/ - default: - charlen = cp->char2uni(source+i, - len_remaining, &temp); - /* if no match, use question mark, which - at least in some cases servers as wild card */ - if (charlen < 1) { - target[j] = cpu_to_le16(0x003f); - charlen = 1; - } else - target[j] = cpu_to_le16(temp); - len_remaining -= charlen; - /* character may take more than one byte in the - the source string, but will take exactly two - bytes in the target string */ - i += charlen; - continue; - } - i++; /* move to next char in source string */ - len_remaining--; - } - -ctoUCS_out: - return i; -} - void cifs_autodisable_serverino(struct cifs_sb_info *cifs_sb) { diff --git a/fs/cifs/netmisc.c b/fs/cifs/netmisc.c index 6783ce6cdc89..8d9189f64477 100644 --- a/fs/cifs/netmisc.c +++ b/fs/cifs/netmisc.c @@ -916,14 +916,14 @@ unsigned int smbCalcSize(struct smb_hdr *ptr) { return (sizeof(struct smb_hdr) + (2 * ptr->WordCount) + - 2 /* size of the bcc field */ + BCC(ptr)); + 2 /* size of the bcc field */ + get_bcc(ptr)); } unsigned int smbCalcSize_LE(struct smb_hdr *ptr) { return (sizeof(struct smb_hdr) + (2 * ptr->WordCount) + - 2 /* size of the bcc field */ + le16_to_cpu(BCC_LE(ptr))); + 2 /* size of the bcc field */ + get_bcc_le(ptr)); } /* The following are taken from fs/ntfs/util.c */ diff --git a/fs/cifs/sess.c b/fs/cifs/sess.c index 1cffd82c4f13..1adc9625a344 100644 --- a/fs/cifs/sess.c +++ b/fs/cifs/sess.c @@ -277,7 +277,7 @@ static void ascii_ssetup_strings(char **pbcc_area, struct cifsSesInfo *ses, } static void -decode_unicode_ssetup(char **pbcc_area, int bleft, struct cifsSesInfo *ses, +decode_unicode_ssetup(char **pbcc_area, __u16 bleft, struct cifsSesInfo *ses, const struct nls_table *nls_cp) { int len; @@ -323,7 +323,7 @@ decode_unicode_ssetup(char **pbcc_area, int bleft, struct cifsSesInfo *ses, return; } -static int decode_ascii_ssetup(char **pbcc_area, int bleft, +static int decode_ascii_ssetup(char **pbcc_area, __u16 bleft, struct cifsSesInfo *ses, const struct nls_table *nls_cp) { @@ -575,12 +575,11 @@ CIFS_SessSetup(unsigned int xid, struct cifsSesInfo *ses, char *str_area; SESSION_SETUP_ANDX *pSMB; __u32 capabilities; - int count; + __u16 count; int resp_buf_type; struct kvec iov[3]; enum securityEnum type; - __u16 action; - int bytes_remaining; + __u16 action, bytes_remaining; struct key *spnego_key = NULL; __le32 phase = NtLmNegotiate; /* NTLMSSP, if needed, is multistage */ u16 blob_len; @@ -876,7 +875,7 @@ CIFS_SessSetup(unsigned int xid, struct cifsSesInfo *ses, count = iov[1].iov_len + iov[2].iov_len; smb_buf->smb_buf_length += count; - BCC_LE(smb_buf) = cpu_to_le16(count); + put_bcc_le(count, smb_buf); rc = SendReceive2(xid, ses, iov, 3 /* num_iovecs */, &resp_buf_type, CIFS_LOG_ERROR); @@ -910,7 +909,7 @@ CIFS_SessSetup(unsigned int xid, struct cifsSesInfo *ses, cFYI(1, "UID = %d ", ses->Suid); /* response can have either 3 or 4 word count - Samba sends 3 */ /* and lanman response is 3 */ - bytes_remaining = BCC(smb_buf); + bytes_remaining = get_bcc(smb_buf); bcc_ptr = pByteArea(smb_buf); if (smb_buf->WordCount == 4) { diff --git a/fs/cifs/transport.c b/fs/cifs/transport.c index c8e2808cd5e6..c1ccca1a933f 100644 --- a/fs/cifs/transport.c +++ b/fs/cifs/transport.c @@ -484,7 +484,7 @@ send_nt_cancel(struct TCP_Server_Info *server, struct smb_hdr *in_buf, in_buf->smb_buf_length = sizeof(struct smb_hdr) - 4 + 2; in_buf->Command = SMB_COM_NT_CANCEL; in_buf->WordCount = 0; - BCC_LE(in_buf) = 0; + put_bcc_le(0, in_buf); mutex_lock(&server->srv_mutex); rc = cifs_sign_smb(in_buf, server, &mid->sequence_number); @@ -632,8 +632,7 @@ SendReceive2(const unsigned int xid, struct cifsSesInfo *ses, if (receive_len >= sizeof(struct smb_hdr) - 4 /* do not count RFC1001 header */ + (2 * midQ->resp_buf->WordCount) + 2 /* bcc */ ) - BCC(midQ->resp_buf) = - le16_to_cpu(BCC_LE(midQ->resp_buf)); + put_bcc(get_bcc_le(midQ->resp_buf), midQ->resp_buf); if ((flags & CIFS_NO_RESP) == 0) midQ->resp_buf = NULL; /* mark it so buf will not be freed by @@ -776,7 +775,7 @@ SendReceive(const unsigned int xid, struct cifsSesInfo *ses, if (receive_len >= sizeof(struct smb_hdr) - 4 /* do not count RFC1001 header */ + (2 * out_buf->WordCount) + 2 /* bcc */ ) - BCC(out_buf) = le16_to_cpu(BCC_LE(out_buf)); + put_bcc(get_bcc_le(midQ->resp_buf), midQ->resp_buf); } else { rc = -EIO; cERROR(1, "Bad MID state?"); @@ -977,7 +976,7 @@ SendReceiveBlockingLock(const unsigned int xid, struct cifsTconInfo *tcon, if (receive_len >= sizeof(struct smb_hdr) - 4 /* do not count RFC1001 header */ + (2 * out_buf->WordCount) + 2 /* bcc */ ) - BCC(out_buf) = le16_to_cpu(BCC_LE(out_buf)); + put_bcc(get_bcc_le(out_buf), out_buf); out: delete_mid(midQ);