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Merge git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6

Browse Source 
* git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6:
  [CIFS] Do not send Query All EAs SMB when mount option nouser_xattr
  [CIFS] endian errors in lanman protocol support
  [CIFS] Fix oops in cifs_close due to unitialized lock sem and list in
  [CIFS] Fix oops when negotiating lanman and no password specified
  [CIFS]
  [CIFS] Allow cifsd to suspend if connection is lost
  [CIFS] Make midState usage more consistent
  [CIFS] spinlock protect read of last srv response time in timeout path
  [CIFS] Do not time out posix brl requests when using new posix setfileinfo
This commit is contained in:
Linus Torvalds 2006-08-29 15:54:07 -07:00
commit dc709bd190
17 changed files with 592 additions and 276 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
fs/cifs/CHANGES
View File

@ -1,3 +1,13 @@
Version 1.45
------------
Do not time out lockw calls when using posix extensions. Do not
time out requests if server still responding reasonably fast
on requests on other threads. Improve POSIX locking emulation,
(lock cancel now works, and unlock of merged range works even
to Windows servers now). Fix oops on mount to lanman servers
(win9x, os/2 etc.) when null password. Do not send listxattr
(SMB to query all EAs) if nouser_xattr specified.
Version 1.44
------------
Rewritten sessionsetup support, including support for legacy SMB

2
fs/cifs/README
View File

@ -408,7 +408,7 @@ A partial list of the supported mount options follows:
user_xattr Allow getting and setting user xattrs as OS/2 EAs (extended
attributes) to the server (default) e.g. via setfattr
and getfattr utilities.
nouser_xattr Do not allow getfattr/setfattr to get/set xattrs
nouser_xattr Do not allow getfattr/setfattr to get/set/list xattrs
mapchars Translate six of the seven reserved characters (not backslash)
*?<>|:
to the remap range (above 0xF000), which also

3
fs/cifs/cifsencrypt.c
View File

@ -277,7 +277,8 @@ void calc_lanman_hash(struct cifsSesInfo * ses, char * lnm_session_key)
return;
memset(password_with_pad, 0, CIFS_ENCPWD_SIZE);
strncpy(password_with_pad, ses->password, CIFS_ENCPWD_SIZE);
if(ses->password)
strncpy(password_with_pad, ses->password, CIFS_ENCPWD_SIZE);
if((ses->server->secMode & SECMODE_PW_ENCRYPT) == 0)
if(extended_security & CIFSSEC_MAY_PLNTXT) {

6
fs/cifs/cifsfs.c
View File

@ -402,7 +402,6 @@ static struct quotactl_ops cifs_quotactl_ops = {
};
#endif
#ifdef CONFIG_CIFS_EXPERIMENTAL
static void cifs_umount_begin(struct vfsmount * vfsmnt, int flags)
{
struct cifs_sb_info *cifs_sb;
@ -422,7 +421,7 @@ static void cifs_umount_begin(struct vfsmount * vfsmnt, int flags)
tcon->tidStatus = CifsExiting;
up(&tcon->tconSem);
/* cancel_brl_requests(tcon); */
/* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */
/* cancel_notify_requests(tcon); */
if(tcon->ses && tcon->ses->server)
{
@ -438,7 +437,6 @@ static void cifs_umount_begin(struct vfsmount * vfsmnt, int flags)
return;
}
#endif
static int cifs_remount(struct super_block *sb, int *flags, char *data)
{
@ -457,9 +455,7 @@ struct super_operations cifs_super_ops = {
unless later we add lazy close of inodes or unless the kernel forgets to call
us with the same number of releases (closes) as opens */
.show_options = cifs_show_options,
#ifdef CONFIG_CIFS_EXPERIMENTAL
.umount_begin = cifs_umount_begin,
#endif
.remount_fs = cifs_remount,
};

2
fs/cifs/cifsfs.h
View File

@ -100,5 +100,5 @@ extern ssize_t cifs_getxattr(struct dentry *, const char *, void *, size_t);
extern ssize_t cifs_listxattr(struct dentry *, char *, size_t);
extern int cifs_ioctl (struct inode * inode, struct file * filep,
unsigned int command, unsigned long arg);
#define CIFS_VERSION "1.44"
#define CIFS_VERSION "1.45"
#endif /* _CIFSFS_H */

18
fs/cifs/cifsglob.h
View File

@ -3,6 +3,7 @@
*
* Copyright (C) International Business Machines Corp., 2002,2006
* Author(s): Steve French (sfrench@us.ibm.com)
* Jeremy Allison (jra@samba.org)
*
* This library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published
@ -158,7 +159,8 @@ struct TCP_Server_Info {
/* 16th byte of RFC1001 workstation name is always null */
char workstation_RFC1001_name[SERVER_NAME_LEN_WITH_NULL];
__u32 sequence_number; /* needed for CIFS PDU signature */
char mac_signing_key[CIFS_SESS_KEY_SIZE + 16];
char mac_signing_key[CIFS_SESS_KEY_SIZE + 16];
unsigned long lstrp; /* when we got last response from this server */
};
/*
@ -266,14 +268,14 @@ struct cifsTconInfo {
};
/*
* This info hangs off the cifsFileInfo structure. This is used to track
* byte stream locks on the file
* This info hangs off the cifsFileInfo structure, pointed to by llist.
* This is used to track byte stream locks on the file
*/
struct cifsLockInfo {
struct cifsLockInfo *next;
int start;
int length;
int type;
struct list_head llist; /* pointer to next cifsLockInfo */
__u64 offset;
__u64 length;
__u8 type;
};
/*
@ -304,6 +306,8 @@ struct cifsFileInfo {
/* lock scope id (0 if none) */
struct file * pfile; /* needed for writepage */
struct inode * pInode; /* needed for oplock break */
struct semaphore lock_sem;
struct list_head llist; /* list of byte range locks we have. */
unsigned closePend:1; /* file is marked to close */
unsigned invalidHandle:1; /* file closed via session abend */
atomic_t wrtPending; /* handle in use - defer close */

4
fs/cifs/cifsproto.h
View File

@ -50,6 +50,10 @@ extern int SendReceive(const unsigned int /* xid */ , struct cifsSesInfo *,
extern int SendReceive2(const unsigned int /* xid */ , struct cifsSesInfo *,
struct kvec *, int /* nvec to send */,
int * /* type of buf returned */ , const int long_op);
extern int SendReceiveBlockingLock(const unsigned int /* xid */ , struct cifsTconInfo *,
struct smb_hdr * /* input */ ,
struct smb_hdr * /* out */ ,
int * /* bytes returned */);
extern int checkSMBhdr(struct smb_hdr *smb, __u16 mid);
extern int checkSMB(struct smb_hdr *smb, __u16 mid, int length);
extern int is_valid_oplock_break(struct smb_hdr *smb, struct TCP_Server_Info *);

28
fs/cifs/cifssmb.c
View File

@ -477,7 +477,7 @@ CIFSSMBNegotiate(unsigned int xid, struct cifsSesInfo *ses)
/* BB get server time for time conversions and add
code to use it and timezone since this is not UTC */
if (rsp->EncryptionKeyLength == CIFS_CRYPTO_KEY_SIZE) {
if (rsp->EncryptionKeyLength == cpu_to_le16(CIFS_CRYPTO_KEY_SIZE)) {
memcpy(server->cryptKey, rsp->EncryptionKey,
CIFS_CRYPTO_KEY_SIZE);
} else if (server->secMode & SECMODE_PW_ENCRYPT) {
@ -1460,8 +1460,13 @@ CIFSSMBLock(const int xid, struct cifsTconInfo *tcon,
pSMB->hdr.smb_buf_length += count;
pSMB->ByteCount = cpu_to_le16(count);
rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
if (waitFlag) {
rc = SendReceiveBlockingLock(xid, tcon, (struct smb_hdr *) pSMB,
(struct smb_hdr *) pSMBr, &bytes_returned);
} else {
rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
(struct smb_hdr *) pSMBr, &bytes_returned, timeout);
}
cifs_stats_inc(&tcon->num_locks);
if (rc) {
cFYI(1, ("Send error in Lock = %d", rc));
@ -1484,6 +1489,7 @@ CIFSSMBPosixLock(const int xid, struct cifsTconInfo *tcon,
char *data_offset;
struct cifs_posix_lock *parm_data;
int rc = 0;
int timeout = 0;
int bytes_returned = 0;
__u16 params, param_offset, offset, byte_count, count;
@ -1503,7 +1509,6 @@ CIFSSMBPosixLock(const int xid, struct cifsTconInfo *tcon,
pSMB->MaxSetupCount = 0;
pSMB->Reserved = 0;
pSMB->Flags = 0;
pSMB->Timeout = 0;
pSMB->Reserved2 = 0;
param_offset = offsetof(struct smb_com_transaction2_sfi_req, Fid) - 4;
offset = param_offset + params;
@ -1529,8 +1534,13 @@ CIFSSMBPosixLock(const int xid, struct cifsTconInfo *tcon,
(((char *) &pSMB->hdr.Protocol) + offset);
parm_data->lock_type = cpu_to_le16(lock_type);
if(waitFlag)
if(waitFlag) {
timeout = 3; /* blocking operation, no timeout */
parm_data->lock_flags = cpu_to_le16(1);
pSMB->Timeout = cpu_to_le32(-1);
} else
pSMB->Timeout = 0;
parm_data->pid = cpu_to_le32(current->tgid);
parm_data->start = cpu_to_le64(pLockData->fl_start);
parm_data->length = cpu_to_le64(len); /* normalize negative numbers */
@ -1541,8 +1551,14 @@ CIFSSMBPosixLock(const int xid, struct cifsTconInfo *tcon,
pSMB->Reserved4 = 0;
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 (waitFlag) {
rc = SendReceiveBlockingLock(xid, tcon, (struct smb_hdr *) pSMB,
(struct smb_hdr *) pSMBr, &bytes_returned);
} else {
rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
(struct smb_hdr *) pSMBr, &bytes_returned, timeout);
}
if (rc) {
cFYI(1, ("Send error in Posix Lock = %d", rc));
} else if (get_flag) {

32
fs/cifs/connect.c
View File

@ -182,6 +182,7 @@ cifs_reconnect(struct TCP_Server_Info *server)
while ((server->tcpStatus != CifsExiting) && (server->tcpStatus != CifsGood))
{
try_to_freeze();
if(server->protocolType == IPV6) {
rc = ipv6_connect(&server->addr.sockAddr6,&server->ssocket);
} else {
@ -612,6 +613,10 @@ multi_t2_fnd:
#ifdef CONFIG_CIFS_STATS2
mid_entry->when_received = jiffies;
#endif
/* so we do not time out requests to server
which is still responding (since server could
be busy but not dead) */
server->lstrp = jiffies;
break;
}
}
@ -1266,33 +1271,35 @@ find_unc(__be32 new_target_ip_addr, char *uncName, char *userName)
read_lock(&GlobalSMBSeslock);
list_for_each(tmp, &GlobalTreeConnectionList) {
cFYI(1, ("Next tcon - "));
cFYI(1, ("Next tcon"));
tcon = list_entry(tmp, struct cifsTconInfo, cifsConnectionList);
if (tcon->ses) {
if (tcon->ses->server) {
cFYI(1,
(" old ip addr: %x == new ip %x ?",
("old ip addr: %x == new ip %x ?",
tcon->ses->server->addr.sockAddr.sin_addr.
s_addr, new_target_ip_addr));
if (tcon->ses->server->addr.sockAddr.sin_addr.
s_addr == new_target_ip_addr) {
/* BB lock tcon and server and tcp session and increment use count here? */
/* BB lock tcon, server and tcp session and increment use count here? */
/* found a match on the TCP session */
/* BB check if reconnection needed */
cFYI(1,("Matched ip, old UNC: %s == new: %s ?",
cFYI(1,("IP match, old UNC: %s new: %s",
tcon->treeName, uncName));
if (strncmp
(tcon->treeName, uncName,
MAX_TREE_SIZE) == 0) {
cFYI(1,
("Matched UNC, old user: %s == new: %s ?",
("and old usr: %s new: %s",
tcon->treeName, uncName));
if (strncmp
(tcon->ses->userName,
userName,
MAX_USERNAME_SIZE) == 0) {
read_unlock(&GlobalSMBSeslock);
return tcon;/* also matched user (smb session)*/
/* matched smb session
(user name */
return tcon;
}
}
}
@ -1969,7 +1976,18 @@ cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
}
cFYI(1,("Negotiate caps 0x%x",(int)cap));
#ifdef CONFIG_CIFS_DEBUG2
if(cap & CIFS_UNIX_FCNTL_CAP)
cFYI(1,("FCNTL cap"));
if(cap & CIFS_UNIX_EXTATTR_CAP)
cFYI(1,("EXTATTR cap"));
if(cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
cFYI(1,("POSIX path cap"));
if(cap & CIFS_UNIX_XATTR_CAP)
cFYI(1,("XATTR cap"));
if(cap & CIFS_UNIX_POSIX_ACL_CAP)
cFYI(1,("POSIX ACL cap"));
#endif /* CIFS_DEBUG2 */
if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) {
cFYI(1,("setting capabilities failed"));
}

4
fs/cifs/dir.c
View File

@ -267,6 +267,10 @@ cifs_create(struct inode *inode, struct dentry *direntry, int mode,
pCifsFile->invalidHandle = FALSE;
pCifsFile->closePend = FALSE;
init_MUTEX(&pCifsFile->fh_sem);
init_MUTEX(&pCifsFile->lock_sem);
INIT_LIST_HEAD(&pCifsFile->llist);
atomic_set(&pCifsFile->wrtPending,0);
/* set the following in open now
pCifsFile->pfile = file; */
write_lock(&GlobalSMBSeslock);

97
fs/cifs/file.c
View File

@ -5,6 +5,7 @@
*
* Copyright (C) International Business Machines Corp., 2002,2003
* Author(s): Steve French (sfrench@us.ibm.com)
* Jeremy Allison (jra@samba.org)
*
* This library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published
@ -47,6 +48,8 @@ static inline struct cifsFileInfo *cifs_init_private(
private_data->netfid = netfid;
private_data->pid = current->tgid;
init_MUTEX(&private_data->fh_sem);
init_MUTEX(&private_data->lock_sem);
INIT_LIST_HEAD(&private_data->llist);
private_data->pfile = file; /* needed for writepage */
private_data->pInode = inode;
private_data->invalidHandle = FALSE;
@ -473,6 +476,8 @@ int cifs_close(struct inode *inode, struct file *file)
cifs_sb = CIFS_SB(inode->i_sb);
pTcon = cifs_sb->tcon;
if (pSMBFile) {
struct cifsLockInfo *li, *tmp;
pSMBFile->closePend = TRUE;
if (pTcon) {
/* no sense reconnecting to close a file that is
@ -496,6 +501,16 @@ int cifs_close(struct inode *inode, struct file *file)
pSMBFile->netfid);
}
}
/* Delete any outstanding lock records.
We'll lose them when the file is closed anyway. */
down(&pSMBFile->lock_sem);
list_for_each_entry_safe(li, tmp, &pSMBFile->llist, llist) {
list_del(&li->llist);
kfree(li);
}
up(&pSMBFile->lock_sem);
write_lock(&GlobalSMBSeslock);
list_del(&pSMBFile->flist);
list_del(&pSMBFile->tlist);
@ -570,6 +585,21 @@ int cifs_closedir(struct inode *inode, struct file *file)
return rc;
}
static int store_file_lock(struct cifsFileInfo *fid, __u64 len,
__u64 offset, __u8 lockType)
{
struct cifsLockInfo *li = kmalloc(sizeof(struct cifsLockInfo), GFP_KERNEL);
if (li == NULL)
return -ENOMEM;
li->offset = offset;
li->length = len;
li->type = lockType;
down(&fid->lock_sem);
list_add(&li->llist, &fid->llist);
up(&fid->lock_sem);
return 0;
}
int cifs_lock(struct file *file, int cmd, struct file_lock *pfLock)
{
int rc, xid;
@ -581,6 +611,7 @@ int cifs_lock(struct file *file, int cmd, struct file_lock *pfLock)
struct cifsTconInfo *pTcon;
__u16 netfid;
__u8 lockType = LOCKING_ANDX_LARGE_FILES;
int posix_locking;
length = 1 + pfLock->fl_end - pfLock->fl_start;
rc = -EACCES;
@ -639,15 +670,14 @@ int cifs_lock(struct file *file, int cmd, struct file_lock *pfLock)
}
netfid = ((struct cifsFileInfo *)file->private_data)->netfid;
posix_locking = (cifs_sb->tcon->ses->capabilities & CAP_UNIX) &&
(CIFS_UNIX_FCNTL_CAP & le64_to_cpu(cifs_sb->tcon->fsUnixInfo.Capability));
/* BB add code here to normalize offset and length to
account for negative length which we can not accept over the
wire */
if (IS_GETLK(cmd)) {
if(experimEnabled &&
(cifs_sb->tcon->ses->capabilities & CAP_UNIX) &&
(CIFS_UNIX_FCNTL_CAP &
le64_to_cpu(cifs_sb->tcon->fsUnixInfo.Capability))) {
if(posix_locking) {
int posix_lock_type;
if(lockType & LOCKING_ANDX_SHARED_LOCK)
posix_lock_type = CIFS_RDLCK;
@ -683,10 +713,15 @@ int cifs_lock(struct file *file, int cmd, struct file_lock *pfLock)
FreeXid(xid);
return rc;
}
if (experimEnabled &&
(cifs_sb->tcon->ses->capabilities & CAP_UNIX) &&
(CIFS_UNIX_FCNTL_CAP &
le64_to_cpu(cifs_sb->tcon->fsUnixInfo.Capability))) {
if (!numLock && !numUnlock) {
/* if no lock or unlock then nothing
to do since we do not know what it is */
FreeXid(xid);
return -EOPNOTSUPP;
}
if (posix_locking) {
int posix_lock_type;
if(lockType & LOCKING_ANDX_SHARED_LOCK)
posix_lock_type = CIFS_RDLCK;
@ -695,18 +730,46 @@ int cifs_lock(struct file *file, int cmd, struct file_lock *pfLock)
if(numUnlock == 1)
posix_lock_type = CIFS_UNLCK;
else if(numLock == 0) {
/* if no lock or unlock then nothing
to do since we do not know what it is */
FreeXid(xid);
return -EOPNOTSUPP;
}
rc = CIFSSMBPosixLock(xid, pTcon, netfid, 0 /* set */,
length, pfLock,
posix_lock_type, wait_flag);
} else
rc = CIFSSMBLock(xid, pTcon, netfid, length, pfLock->fl_start,
numUnlock, numLock, lockType, wait_flag);
} else {
struct cifsFileInfo *fid = (struct cifsFileInfo *)file->private_data;
if (numLock) {
rc = CIFSSMBLock(xid, pTcon, netfid, length, pfLock->fl_start,
0, numLock, lockType, wait_flag);
if (rc == 0) {
/* For Windows locks we must store them. */
rc = store_file_lock(fid, length,
pfLock->fl_start, lockType);
}
} else if (numUnlock) {
/* For each stored lock that this unlock overlaps
completely, unlock it. */
int stored_rc = 0;
struct cifsLockInfo *li, *tmp;
down(&fid->lock_sem);
list_for_each_entry_safe(li, tmp, &fid->llist, llist) {
if (pfLock->fl_start <= li->offset &&
length >= li->length) {
stored_rc = CIFSSMBLock(xid, pTcon, netfid,
li->length, li->offset,
1, 0, li->type, FALSE);
if (stored_rc)
rc = stored_rc;
list_del(&li->llist);
kfree(li);
}
}
up(&fid->lock_sem);
}
}
if (pfLock->fl_flags & FL_POSIX)
posix_lock_file_wait(file, pfLock);
FreeXid(xid);

1
fs/cifs/netmisc.c
View File

@ -72,6 +72,7 @@ static const struct smb_to_posix_error mapping_table_ERRDOS[] = {
{ERRinvlevel,-EOPNOTSUPP},
{ERRdirnotempty, -ENOTEMPTY},
{ERRnotlocked, -ENOLCK},
{ERRcancelviolation, -ENOLCK},
{ERRalreadyexists, -EEXIST},
{ERRmoredata, -EOVERFLOW},
{ERReasnotsupported,-EOPNOTSUPP},

2
fs/cifs/readdir.c
View File

@ -556,7 +556,7 @@ static int cifs_entry_is_dot(char *current_entry, struct cifsFileInfo *cfile)
FIND_FILE_STANDARD_INFO * pFindData =
(FIND_FILE_STANDARD_INFO *)current_entry;
filename = &pFindData->FileName[0];
len = le32_to_cpu(pFindData->FileNameLength);
len = pFindData->FileNameLength;
} else {
cFYI(1,("Unknown findfirst level %d",cfile->srch_inf.info_level));
}

2
fs/cifs/sess.c
View File

@ -372,7 +372,7 @@ CIFS_SessSetup(unsigned int xid, struct cifsSesInfo *ses, int first_time,
/* no capabilities flags in old lanman negotiation */
pSMB->old_req.PasswordLength = CIFS_SESS_KEY_SIZE;
pSMB->old_req.PasswordLength = cpu_to_le16(CIFS_SESS_KEY_SIZE);
/* BB calculate hash with password */
/* and copy into bcc */

1
fs/cifs/smberr.h
View File

@ -95,6 +95,7 @@
#define ERRinvlevel 124
#define ERRdirnotempty 145
#define ERRnotlocked 158
#define ERRcancelviolation 173
#define ERRalreadyexists 183
#define ERRbadpipe 230
#define ERRpipebusy 231

650
fs/cifs/transport.c
View File

@ -3,7 +3,8 @@
*
* Copyright (C) International Business Machines Corp., 2002,2005
* Author(s): Steve French (sfrench@us.ibm.com)
*
* Jeremy Allison (jra@samba.org) 2006.
*
* This library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation; either version 2.1 of the License, or
@ -36,7 +37,7 @@ extern mempool_t *cifs_mid_poolp;
extern kmem_cache_t *cifs_oplock_cachep;
static struct mid_q_entry *
AllocMidQEntry(struct smb_hdr *smb_buffer, struct cifsSesInfo *ses)
AllocMidQEntry(const struct smb_hdr *smb_buffer, struct cifsSesInfo *ses)
{
struct mid_q_entry *temp;
@ -203,6 +204,10 @@ smb_send(struct socket *ssocket, struct smb_hdr *smb_buffer,
rc = 0;
}
/* Don't want to modify the buffer as a
side effect of this call. */
smb_buffer->smb_buf_length = smb_buf_length;
return rc;
}
@ -217,6 +222,7 @@ smb_send2(struct socket *ssocket, struct kvec *iov, int n_vec,
unsigned int len = iov[0].iov_len;
unsigned int total_len;
int first_vec = 0;
unsigned int smb_buf_length = smb_buffer->smb_buf_length;
if(ssocket == NULL)
return -ENOTSOCK; /* BB eventually add reconnect code here */
@ -293,9 +299,123 @@ smb_send2(struct socket *ssocket, struct kvec *iov, int n_vec,
} else
rc = 0;
/* Don't want to modify the buffer as a
side effect of this call. */
smb_buffer->smb_buf_length = smb_buf_length;
return rc;
}
static int wait_for_free_request(struct cifsSesInfo *ses, const int long_op)
{
if(long_op == -1) {
/* oplock breaks must not be held up */
atomic_inc(&ses->server->inFlight);
} else {
spin_lock(&GlobalMid_Lock);
while(1) {
if(atomic_read(&ses->server->inFlight) >=
cifs_max_pending){
spin_unlock(&GlobalMid_Lock);
#ifdef CONFIG_CIFS_STATS2
atomic_inc(&ses->server->num_waiters);
#endif
wait_event(ses->server->request_q,
atomic_read(&ses->server->inFlight)
< cifs_max_pending);
#ifdef CONFIG_CIFS_STATS2
atomic_dec(&ses->server->num_waiters);
#endif
spin_lock(&GlobalMid_Lock);
} else {
if(ses->server->tcpStatus == CifsExiting) {
spin_unlock(&GlobalMid_Lock);
return -ENOENT;
}
/* can not count locking commands against total since
they are allowed to block on server */
/* update # of requests on the wire to server */
if (long_op < 3)
atomic_inc(&ses->server->inFlight);
spin_unlock(&GlobalMid_Lock);
break;
}
}
}
return 0;
}
static int allocate_mid(struct cifsSesInfo *ses, struct smb_hdr *in_buf,
struct mid_q_entry **ppmidQ)
{
if (ses->server->tcpStatus == CifsExiting) {
return -ENOENT;
} else if (ses->server->tcpStatus == CifsNeedReconnect) {
cFYI(1,("tcp session dead - return to caller to retry"));
return -EAGAIN;
} else if (ses->status != CifsGood) {
/* check if SMB session is bad because we are setting it up */
if((in_buf->Command != SMB_COM_SESSION_SETUP_ANDX) &&
(in_buf->Command != SMB_COM_NEGOTIATE)) {
return -EAGAIN;
} /* else ok - we are setting up session */
}
*ppmidQ = AllocMidQEntry(in_buf, ses);
if (*ppmidQ == NULL) {
return -ENOMEM;
}
return 0;
}
static int wait_for_response(struct cifsSesInfo *ses,
struct mid_q_entry *midQ,
unsigned long timeout,
unsigned long time_to_wait)
{
unsigned long curr_timeout;
for (;;) {
curr_timeout = timeout + jiffies;
wait_event(ses->server->response_q,
(!(midQ->midState == MID_REQUEST_SUBMITTED)) ||
time_after(jiffies, curr_timeout) ||
((ses->server->tcpStatus != CifsGood) &&
(ses->server->tcpStatus != CifsNew)));
if (time_after(jiffies, curr_timeout) &&
(midQ->midState == MID_REQUEST_SUBMITTED) &&
((ses->server->tcpStatus == CifsGood) ||
(ses->server->tcpStatus == CifsNew))) {
unsigned long lrt;
/* We timed out. Is the server still
sending replies ? */
spin_lock(&GlobalMid_Lock);
lrt = ses->server->lstrp;
spin_unlock(&GlobalMid_Lock);
/* Calculate time_to_wait past last receive time.
Although we prefer not to time out if the
server is still responding - we will time
out if the server takes more than 15 (or 45
or 180) seconds to respond to this request
and has not responded to any request from
other threads on the client within 10 seconds */
lrt += time_to_wait;
if (time_after(jiffies, lrt)) {
/* No replies for time_to_wait. */
cERROR(1,("server not responding"));
return -1;
}
} else {
return 0;
}
}
}
int
SendReceive2(const unsigned int xid, struct cifsSesInfo *ses,
struct kvec *iov, int n_vec, int * pRespBufType /* ret */,
@ -323,75 +443,27 @@ SendReceive2(const unsigned int xid, struct cifsSesInfo *ses,
/* Ensure that we do not send more than 50 overlapping requests
to the same server. We may make this configurable later or
use ses->maxReq */
if(long_op == -1) {
/* oplock breaks must not be held up */
atomic_inc(&ses->server->inFlight);
} else {
spin_lock(&GlobalMid_Lock);
while(1) {
if(atomic_read(&ses->server->inFlight) >=
cifs_max_pending){
spin_unlock(&GlobalMid_Lock);
#ifdef CONFIG_CIFS_STATS2
atomic_inc(&ses->server->num_waiters);
#endif
wait_event(ses->server->request_q,
atomic_read(&ses->server->inFlight)
< cifs_max_pending);
#ifdef CONFIG_CIFS_STATS2
atomic_dec(&ses->server->num_waiters);
#endif
spin_lock(&GlobalMid_Lock);
} else {
if(ses->server->tcpStatus == CifsExiting) {
spin_unlock(&GlobalMid_Lock);
cifs_small_buf_release(in_buf);
return -ENOENT;
}
/* can not count locking commands against total since
they are allowed to block on server */
if(long_op < 3) {
/* update # of requests on the wire to server */
atomic_inc(&ses->server->inFlight);
}
spin_unlock(&GlobalMid_Lock);
break;
}
}
rc = wait_for_free_request(ses, long_op);
if (rc) {
cifs_small_buf_release(in_buf);
return rc;
}
/* make sure that we sign in the same order that we send on this socket
and avoid races inside tcp sendmsg code that could cause corruption
of smb data */
down(&ses->server->tcpSem);
if (ses->server->tcpStatus == CifsExiting) {
rc = -ENOENT;
goto out_unlock2;
} else if (ses->server->tcpStatus == CifsNeedReconnect) {
cFYI(1,("tcp session dead - return to caller to retry"));
rc = -EAGAIN;
goto out_unlock2;
} else if (ses->status != CifsGood) {
/* check if SMB session is bad because we are setting it up */
if((in_buf->Command != SMB_COM_SESSION_SETUP_ANDX) &&
(in_buf->Command != SMB_COM_NEGOTIATE)) {
rc = -EAGAIN;
goto out_unlock2;
} /* else ok - we are setting up session */
}
midQ = AllocMidQEntry(in_buf, ses);
if (midQ == NULL) {
rc = allocate_mid(ses, in_buf, &midQ);
if (rc) {
up(&ses->server->tcpSem);
cifs_small_buf_release(in_buf);
/* If not lock req, update # of requests on wire to server */
if(long_op < 3) {
atomic_dec(&ses->server->inFlight);
wake_up(&ses->server->request_q);
}
return -ENOMEM;
/* Update # of requests on wire to server */
atomic_dec(&ses->server->inFlight);
wake_up(&ses->server->request_q);
return rc;
}
rc = cifs_sign_smb2(iov, n_vec, ses->server, &midQ->sequence_number);
@ -406,32 +478,23 @@ SendReceive2(const unsigned int xid, struct cifsSesInfo *ses,
atomic_dec(&ses->server->inSend);
midQ->when_sent = jiffies;
#endif
if(rc < 0) {
DeleteMidQEntry(midQ);
up(&ses->server->tcpSem);
cifs_small_buf_release(in_buf);
/* If not lock req, update # of requests on wire to server */
if(long_op < 3) {
atomic_dec(&ses->server->inFlight);
wake_up(&ses->server->request_q);
}
return rc;
} else {
up(&ses->server->tcpSem);
cifs_small_buf_release(in_buf);
}
up(&ses->server->tcpSem);
cifs_small_buf_release(in_buf);
if(rc < 0)
goto out;
if (long_op == -1)
goto cifs_no_response_exit2;
goto out;
else if (long_op == 2) /* writes past end of file can take loong time */
timeout = 180 * HZ;
else if (long_op == 1)
timeout = 45 * HZ; /* should be greater than
servers oplock break timeout (about 43 seconds) */
else if (long_op > 2) {
timeout = MAX_SCHEDULE_TIMEOUT;
} else
else
timeout = 15 * HZ;
/* wait for 15 seconds or until woken up due to response arriving or
due to last connection to this server being unmounted */
if (signal_pending(current)) {
@ -441,19 +504,7 @@ SendReceive2(const unsigned int xid, struct cifsSesInfo *ses,
}
/* No user interrupts in wait - wreaks havoc with performance */
if(timeout != MAX_SCHEDULE_TIMEOUT) {
timeout += jiffies;
wait_event(ses->server->response_q,
(!(midQ->midState & MID_REQUEST_SUBMITTED)) ||
time_after(jiffies, timeout) ||
((ses->server->tcpStatus != CifsGood) &&
(ses->server->tcpStatus != CifsNew)));
} else {
wait_event(ses->server->response_q,
(!(midQ->midState & MID_REQUEST_SUBMITTED)) ||
((ses->server->tcpStatus != CifsGood) &&
(ses->server->tcpStatus != CifsNew)));
}
wait_for_response(ses, midQ, timeout, 10 * HZ);
spin_lock(&GlobalMid_Lock);
if (midQ->resp_buf) {
@ -481,11 +532,9 @@ SendReceive2(const unsigned int xid, struct cifsSesInfo *ses,
}
spin_unlock(&GlobalMid_Lock);
DeleteMidQEntry(midQ);
/* If not lock req, update # of requests on wire to server */
if(long_op < 3) {
atomic_dec(&ses->server->inFlight);
wake_up(&ses->server->request_q);
}
/* Update # of requests on wire to server */
atomic_dec(&ses->server->inFlight);
wake_up(&ses->server->request_q);
return rc;
}
@ -536,24 +585,12 @@ SendReceive2(const unsigned int xid, struct cifsSesInfo *ses,
cFYI(1,("Bad MID state?"));
}
}
cifs_no_response_exit2:
out:
DeleteMidQEntry(midQ);
if(long_op < 3) {
atomic_dec(&ses->server->inFlight);
wake_up(&ses->server->request_q);
}
return rc;
out_unlock2:
up(&ses->server->tcpSem);
cifs_small_buf_release(in_buf);
/* If not lock req, update # of requests on wire to server */
if(long_op < 3) {
atomic_dec(&ses->server->inFlight);
wake_up(&ses->server->request_q);
}
atomic_dec(&ses->server->inFlight);
wake_up(&ses->server->request_q);
return rc;
}
@ -583,85 +620,34 @@ SendReceive(const unsigned int xid, struct cifsSesInfo *ses,
/* Ensure that we do not send more than 50 overlapping requests
to the same server. We may make this configurable later or
use ses->maxReq */
if(long_op == -1) {
/* oplock breaks must not be held up */
atomic_inc(&ses->server->inFlight);
} else {
spin_lock(&GlobalMid_Lock);
while(1) {
if(atomic_read(&ses->server->inFlight) >=
cifs_max_pending){
spin_unlock(&GlobalMid_Lock);
#ifdef CONFIG_CIFS_STATS2
atomic_inc(&ses->server->num_waiters);
#endif
wait_event(ses->server->request_q,
atomic_read(&ses->server->inFlight)
< cifs_max_pending);
#ifdef CONFIG_CIFS_STATS2
atomic_dec(&ses->server->num_waiters);
#endif
spin_lock(&GlobalMid_Lock);
} else {
if(ses->server->tcpStatus == CifsExiting) {
spin_unlock(&GlobalMid_Lock);
return -ENOENT;
}
/* can not count locking commands against total since
they are allowed to block on server */
if(long_op < 3) {
/* update # of requests on the wire to server */
atomic_inc(&ses->server->inFlight);
}
spin_unlock(&GlobalMid_Lock);
break;
}
}
}
rc = wait_for_free_request(ses, long_op);
if (rc)
return rc;
/* make sure that we sign in the same order that we send on this socket
and avoid races inside tcp sendmsg code that could cause corruption
of smb data */
down(&ses->server->tcpSem);
if (ses->server->tcpStatus == CifsExiting) {
rc = -ENOENT;
goto out_unlock;
} else if (ses->server->tcpStatus == CifsNeedReconnect) {
cFYI(1,("tcp session dead - return to caller to retry"));
rc = -EAGAIN;
goto out_unlock;
} else if (ses->status != CifsGood) {
/* check if SMB session is bad because we are setting it up */
if((in_buf->Command != SMB_COM_SESSION_SETUP_ANDX) &&
(in_buf->Command != SMB_COM_NEGOTIATE)) {
rc = -EAGAIN;
goto out_unlock;
} /* else ok - we are setting up session */
}
midQ = AllocMidQEntry(in_buf, ses);
if (midQ == NULL) {
rc = allocate_mid(ses, in_buf, &midQ);
if (rc) {
up(&ses->server->tcpSem);
/* If not lock req, update # of requests on wire to server */
if(long_op < 3) {
atomic_dec(&ses->server->inFlight);
wake_up(&ses->server->request_q);
}
return -ENOMEM;
/* Update # of requests on wire to server */
atomic_dec(&ses->server->inFlight);
wake_up(&ses->server->request_q);
return rc;
}
if (in_buf->smb_buf_length > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) {
up(&ses->server->tcpSem);
cERROR(1, ("Illegal length, greater than maximum frame, %d",
in_buf->smb_buf_length));
DeleteMidQEntry(midQ);
/* If not lock req, update # of requests on wire to server */
if(long_op < 3) {
atomic_dec(&ses->server->inFlight);
wake_up(&ses->server->request_q);
}
up(&ses->server->tcpSem);
/* Update # of requests on wire to server */
atomic_dec(&ses->server->inFlight);
wake_up(&ses->server->request_q);
return -EIO;
}
@ -677,27 +663,19 @@ SendReceive(const unsigned int xid, struct cifsSesInfo *ses,
atomic_dec(&ses->server->inSend);
midQ->when_sent = jiffies;
#endif
if(rc < 0) {
DeleteMidQEntry(midQ);
up(&ses->server->tcpSem);
/* If not lock req, update # of requests on wire to server */
if(long_op < 3) {
atomic_dec(&ses->server->inFlight);
wake_up(&ses->server->request_q);
}
return rc;
} else
up(&ses->server->tcpSem);
up(&ses->server->tcpSem);
if(rc < 0)
goto out;
if (long_op == -1)
goto cifs_no_response_exit;
goto out;
else if (long_op == 2) /* writes past end of file can take loong time */
timeout = 180 * HZ;
else if (long_op == 1)
timeout = 45 * HZ; /* should be greater than
servers oplock break timeout (about 43 seconds) */
else if (long_op > 2) {
timeout = MAX_SCHEDULE_TIMEOUT;
} else
else
timeout = 15 * HZ;
/* wait for 15 seconds or until woken up due to response arriving or
due to last connection to this server being unmounted */
@ -708,19 +686,7 @@ SendReceive(const unsigned int xid, struct cifsSesInfo *ses,
}
/* No user interrupts in wait - wreaks havoc with performance */
if(timeout != MAX_SCHEDULE_TIMEOUT) {
timeout += jiffies;
wait_event(ses->server->response_q,
(!(midQ->midState & MID_REQUEST_SUBMITTED)) ||
time_after(jiffies, timeout) ||
((ses->server->tcpStatus != CifsGood) &&
(ses->server->tcpStatus != CifsNew)));
} else {
wait_event(ses->server->response_q,
(!(midQ->midState & MID_REQUEST_SUBMITTED)) ||
((ses->server->tcpStatus != CifsGood) &&
(ses->server->tcpStatus != CifsNew)));
}
wait_for_response(ses, midQ, timeout, 10 * HZ);
spin_lock(&GlobalMid_Lock);
if (midQ->resp_buf) {
@ -748,11 +714,9 @@ SendReceive(const unsigned int xid, struct cifsSesInfo *ses,
}
spin_unlock(&GlobalMid_Lock);
DeleteMidQEntry(midQ);
/* If not lock req, update # of requests on wire to server */
if(long_op < 3) {
atomic_dec(&ses->server->inFlight);
wake_up(&ses->server->request_q);
}
/* Update # of requests on wire to server */
atomic_dec(&ses->server->inFlight);
wake_up(&ses->server->request_q);
return rc;
}
@ -799,23 +763,253 @@ SendReceive(const unsigned int xid, struct cifsSesInfo *ses,
cERROR(1,("Bad MID state?"));
}
}
cifs_no_response_exit:
out:
DeleteMidQEntry(midQ);
if(long_op < 3) {
atomic_dec(&ses->server->inFlight);
wake_up(&ses->server->request_q);
}
return rc;
out_unlock:
up(&ses->server->tcpSem);
/* If not lock req, update # of requests on wire to server */
if(long_op < 3) {
atomic_dec(&ses->server->inFlight);
wake_up(&ses->server->request_q);
}
atomic_dec(&ses->server->inFlight);
wake_up(&ses->server->request_q);
return rc;
}
/* Send an NT_CANCEL SMB to cause the POSIX blocking lock to return. */
static int
send_nt_cancel(struct cifsTconInfo *tcon, struct smb_hdr *in_buf,
struct mid_q_entry *midQ)
{
int rc = 0;
struct cifsSesInfo *ses = tcon->ses;
__u16 mid = in_buf->Mid;
header_assemble(in_buf, SMB_COM_NT_CANCEL, tcon, 0);
in_buf->Mid = mid;
down(&ses->server->tcpSem);
rc = cifs_sign_smb(in_buf, ses->server, &midQ->sequence_number);
if (rc) {
up(&ses->server->tcpSem);
return rc;
}
rc = smb_send(ses->server->ssocket, in_buf, in_buf->smb_buf_length,
(struct sockaddr *) &(ses->server->addr.sockAddr));
up(&ses->server->tcpSem);
return rc;
}
/* We send a LOCKINGX_CANCEL_LOCK to cause the Windows
blocking lock to return. */
static int
send_lock_cancel(const unsigned int xid, struct cifsTconInfo *tcon,
struct smb_hdr *in_buf,
struct smb_hdr *out_buf)
{
int bytes_returned;
struct cifsSesInfo *ses = tcon->ses;
LOCK_REQ *pSMB = (LOCK_REQ *)in_buf;
/* We just modify the current in_buf to change
the type of lock from LOCKING_ANDX_SHARED_LOCK
or LOCKING_ANDX_EXCLUSIVE_LOCK to
LOCKING_ANDX_CANCEL_LOCK. */
pSMB->LockType = LOCKING_ANDX_CANCEL_LOCK|LOCKING_ANDX_LARGE_FILES;
pSMB->Timeout = 0;
pSMB->hdr.Mid = GetNextMid(ses->server);
return SendReceive(xid, ses, in_buf, out_buf,
&bytes_returned, 0);
}
int
SendReceiveBlockingLock(const unsigned int xid, struct cifsTconInfo *tcon,
struct smb_hdr *in_buf, struct smb_hdr *out_buf,
int *pbytes_returned)
{
int rc = 0;
int rstart = 0;
unsigned int receive_len;
struct mid_q_entry *midQ;
struct cifsSesInfo *ses;
if (tcon == NULL || tcon->ses == NULL) {
cERROR(1,("Null smb session"));
return -EIO;
}
ses = tcon->ses;
if(ses->server == NULL) {
cERROR(1,("Null tcp session"));
return -EIO;
}
if(ses->server->tcpStatus == CifsExiting)
return -ENOENT;
/* Ensure that we do not send more than 50 overlapping requests
to the same server. We may make this configurable later or
use ses->maxReq */
rc = wait_for_free_request(ses, 3);
if (rc)
return rc;
/* make sure that we sign in the same order that we send on this socket
and avoid races inside tcp sendmsg code that could cause corruption
of smb data */
down(&ses->server->tcpSem);
rc = allocate_mid(ses, in_buf, &midQ);
if (rc) {
up(&ses->server->tcpSem);
return rc;
}
if (in_buf->smb_buf_length > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) {
up(&ses->server->tcpSem);
cERROR(1, ("Illegal length, greater than maximum frame, %d",
in_buf->smb_buf_length));
DeleteMidQEntry(midQ);
return -EIO;
}
rc = cifs_sign_smb(in_buf, ses->server, &midQ->sequence_number);
midQ->midState = MID_REQUEST_SUBMITTED;
#ifdef CONFIG_CIFS_STATS2
atomic_inc(&ses->server->inSend);
#endif
rc = smb_send(ses->server->ssocket, in_buf, in_buf->smb_buf_length,
(struct sockaddr *) &(ses->server->addr.sockAddr));
#ifdef CONFIG_CIFS_STATS2
atomic_dec(&ses->server->inSend);
midQ->when_sent = jiffies;
#endif
up(&ses->server->tcpSem);
if(rc < 0) {
DeleteMidQEntry(midQ);
return rc;
}
/* Wait for a reply - allow signals to interrupt. */
rc = wait_event_interruptible(ses->server->response_q,
(!(midQ->midState == MID_REQUEST_SUBMITTED)) ||
((ses->server->tcpStatus != CifsGood) &&
(ses->server->tcpStatus != CifsNew)));
/* Were we interrupted by a signal ? */
if ((rc == -ERESTARTSYS) &&
(midQ->midState == MID_REQUEST_SUBMITTED) &&
((ses->server->tcpStatus == CifsGood) ||
(ses->server->tcpStatus == CifsNew))) {
if (in_buf->Command == SMB_COM_TRANSACTION2) {
/* POSIX lock. We send a NT_CANCEL SMB to cause the
blocking lock to return. */
rc = send_nt_cancel(tcon, in_buf, midQ);
if (rc) {
DeleteMidQEntry(midQ);
return rc;
}
} else {
/* Windows lock. We send a LOCKINGX_CANCEL_LOCK
to cause the blocking lock to return. */
rc = send_lock_cancel(xid, tcon, in_buf, out_buf);
/* If we get -ENOLCK back the lock may have
already been removed. Don't exit in this case. */
if (rc && rc != -ENOLCK) {
DeleteMidQEntry(midQ);
return rc;
}
}
/* Wait 5 seconds for the response. */
if (wait_for_response(ses, midQ, 5 * HZ, 5 * HZ)==0) {
/* We got the response - restart system call. */
rstart = 1;
}
}
spin_lock(&GlobalMid_Lock);
if (midQ->resp_buf) {
spin_unlock(&GlobalMid_Lock);
receive_len = midQ->resp_buf->smb_buf_length;
} else {
cERROR(1,("No response for cmd %d mid %d",
midQ->command, midQ->mid));
if(midQ->midState == MID_REQUEST_SUBMITTED) {
if(ses->server->tcpStatus == CifsExiting)
rc = -EHOSTDOWN;
else {
ses->server->tcpStatus = CifsNeedReconnect;
midQ->midState = MID_RETRY_NEEDED;
}
}
if (rc != -EHOSTDOWN) {
if(midQ->midState == MID_RETRY_NEEDED) {
rc = -EAGAIN;
cFYI(1,("marking request for retry"));
} else {
rc = -EIO;
}
}
spin_unlock(&GlobalMid_Lock);
DeleteMidQEntry(midQ);
return rc;
}
if (receive_len > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE) {
cERROR(1, ("Frame too large received. Length: %d Xid: %d",
receive_len, xid));
rc = -EIO;
} else { /* rcvd frame is ok */
if (midQ->resp_buf && out_buf
&& (midQ->midState == MID_RESPONSE_RECEIVED)) {
out_buf->smb_buf_length = receive_len;
memcpy((char *)out_buf + 4,
(char *)midQ->resp_buf + 4,
receive_len);
dump_smb(out_buf, 92);
/* convert the length into a more usable form */
if((receive_len > 24) &&
(ses->server->secMode & (SECMODE_SIGN_REQUIRED |
SECMODE_SIGN_ENABLED))) {
rc = cifs_verify_signature(out_buf,
ses->server->mac_signing_key,
midQ->sequence_number+1);
if(rc) {
cERROR(1,("Unexpected SMB signature"));
/* BB FIXME add code to kill session */
}
}
*pbytes_returned = out_buf->smb_buf_length;
/* BB special case reconnect tid and uid here? */
rc = map_smb_to_linux_error(out_buf);
/* convert ByteCount if necessary */
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));
} else {
rc = -EIO;
cERROR(1,("Bad MID state?"));
}
}
DeleteMidQEntry(midQ);
if (rstart && rc == -EACCES)
return -ERESTARTSYS;
return rc;
}

6
fs/cifs/xattr.c
View File

@ -330,11 +330,15 @@ ssize_t cifs_listxattr(struct dentry * direntry, char * data, size_t buf_size)
sb = direntry->d_inode->i_sb;
if(sb == NULL)
return -EIO;
xid = GetXid();
cifs_sb = CIFS_SB(sb);
pTcon = cifs_sb->tcon;
if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
return -EOPNOTSUPP;
xid = GetXid();
full_path = build_path_from_dentry(direntry);
if(full_path == NULL) {
FreeXid(xid);