Techwizz/kernel-fxtec-pro1x
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

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: when renaming don't try to unlink negative dentry
  cifs: remove unneeded bcc_ptr update in CIFSTCon
  cifs: add cFYI messages with some of the saved strings from ssetup/tcon
  cifs: fix buffer size for tcon->nativeFileSystem field
  cifs: fix unicode string area word alignment in session setup
  [CIFS] Fix build break caused by change to new current_umask helper function
  [CIFS] Fix sparse warnings
  [CIFS] Add support for posix open during lookup
  cifs: no need to use rcu_assign_pointer on immutable keys
  cifs: remove dnotify thread code
  [CIFS] remove some build warnings
  cifs: vary timeout on writes past EOF based on offset (try #5)
  [CIFS] Fix build break from recent DFS patch when DFS support not enabled
  Remote DFS root support.
  [CIFS] Endian convert UniqueId when reporting inode numbers from server files
  cifs: remove some pointless conditionals before kfree()
  cifs: flush data on any setattr
This commit is contained in:
Linus Torvalds 2009-04-18 21:37:07 -07:00
commit 8d4ab5daca
13 changed files with 405 additions and 270 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

3
fs/cifs/CHANGES
View file

@ -15,7 +15,8 @@ Posix file open support added (turned off after one attempt if server
fails to support it properly, as with Samba server versions prior to 3.3.2)
Fix "redzone overwritten" bug in cifs_put_tcon (CIFSTcon may allocate too
little memory for the "nativeFileSystem" field returned by the server
during mount).
during mount). Endian convert inode numbers if necessary (makes it easier
to compare inode numbers on network files from big endian systems).
Version 1.56
------------

2
fs/cifs/cifs_spnego.c
View file

@ -41,7 +41,7 @@ cifs_spnego_key_instantiate(struct key *key, const void *data, size_t datalen)
/* attach the data */
memcpy(payload, data, datalen);
rcu_assign_pointer(key->payload.data, payload);
key->payload.data = payload;
ret = 0;
error:

48
fs/cifs/cifsfs.c
View file

@ -66,9 +66,6 @@ unsigned int sign_CIFS_PDUs = 1;
extern struct task_struct *oplockThread; /* remove sparse warning */
struct task_struct *oplockThread = NULL;
/* extern struct task_struct * dnotifyThread; remove sparse warning */
#ifdef CONFIG_CIFS_EXPERIMENTAL
static struct task_struct *dnotifyThread = NULL;
#endif
static const struct super_operations cifs_super_ops;
unsigned int CIFSMaxBufSize = CIFS_MAX_MSGSIZE;
module_param(CIFSMaxBufSize, int, 0);
@ -316,6 +313,7 @@ cifs_alloc_inode(struct super_block *sb)
cifs_inode->clientCanCacheAll = false;
cifs_inode->delete_pending = false;
cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */
cifs_inode->server_eof = 0;
/* Can not set i_flags here - they get immediately overwritten
to zero by the VFS */
@ -1040,34 +1038,6 @@ static int cifs_oplock_thread(void *dummyarg)
return 0;
}
#ifdef CONFIG_CIFS_EXPERIMENTAL
static int cifs_dnotify_thread(void *dummyarg)
{
struct list_head *tmp;
struct TCP_Server_Info *server;
do {
if (try_to_freeze())
continue;
set_current_state(TASK_INTERRUPTIBLE);
schedule_timeout(15*HZ);
/* check if any stuck requests that need
to be woken up and wakeq so the
thread can wake up and error out */
read_lock(&cifs_tcp_ses_lock);
list_for_each(tmp, &cifs_tcp_ses_list) {
server = list_entry(tmp, struct TCP_Server_Info,
tcp_ses_list);
if (atomic_read(&server->inFlight))
wake_up_all(&server->response_q);
}
read_unlock(&cifs_tcp_ses_lock);
} while (!kthread_should_stop());
return 0;
}
#endif
static int __init
init_cifs(void)
{
@ -1144,21 +1114,8 @@ init_cifs(void)
goto out_unregister_dfs_key_type;
}
#ifdef CONFIG_CIFS_EXPERIMENTAL
dnotifyThread = kthread_run(cifs_dnotify_thread, NULL, "cifsdnotifyd");
if (IS_ERR(dnotifyThread)) {
rc = PTR_ERR(dnotifyThread);
cERROR(1, ("error %d create dnotify thread", rc));
goto out_stop_oplock_thread;
}
#endif
return 0;
#ifdef CONFIG_CIFS_EXPERIMENTAL
out_stop_oplock_thread:
#endif
kthread_stop(oplockThread);
out_unregister_dfs_key_type:
#ifdef CONFIG_CIFS_DFS_UPCALL
unregister_key_type(&key_type_dns_resolver);
@ -1196,9 +1153,6 @@ exit_cifs(void)
cifs_destroy_inodecache();
cifs_destroy_mids();
cifs_destroy_request_bufs();
#ifdef CONFIG_CIFS_EXPERIMENTAL
kthread_stop(dnotifyThread);
#endif
kthread_stop(oplockThread);
}

3
fs/cifs/cifsglob.h
View file

@ -350,7 +350,7 @@ struct cifsFileInfo {
bool invalidHandle:1; /* file closed via session abend */
bool messageMode:1; /* for pipes: message vs byte mode */
atomic_t wrtPending; /* handle in use - defer close */
struct semaphore fh_sem; /* prevents reopen race after dead ses*/
struct mutex fh_mutex; /* prevents reopen race after dead ses*/
struct cifs_search_info srch_inf;
};
@ -370,6 +370,7 @@ struct cifsInodeInfo {
bool clientCanCacheAll:1; /* read and writebehind oplock */
bool oplockPending:1;
bool delete_pending:1; /* DELETE_ON_CLOSE is set */
u64 server_eof; /* current file size on server */
struct inode vfs_inode;
};

8
fs/cifs/cifspdu.h
View file

@ -2163,7 +2163,7 @@ typedef struct {
__le32 Type;
__le64 DevMajor;
__le64 DevMinor;
__u64 UniqueId;
__le64 UniqueId;
__le64 Permissions;
__le64 Nlinks;
} __attribute__((packed)) FILE_UNIX_BASIC_INFO; /* level 0x200 QPathInfo */
@ -2308,7 +2308,7 @@ struct unlink_psx_rq { /* level 0x20a SetPathInfo */
} __attribute__((packed));
struct file_internal_info {
__u64 UniqueId; /* inode number */
__le64 UniqueId; /* inode number */
} __attribute__((packed)); /* level 0x3ee */
struct file_mode_info {
@ -2338,7 +2338,7 @@ typedef struct {
__le32 Type;
__le64 DevMajor;
__le64 DevMinor;
__u64 UniqueId;
__le64 UniqueId;
__le64 Permissions;
__le64 Nlinks;
char FileName[1];
@ -2386,7 +2386,7 @@ typedef struct {
__le32 FileNameLength;
__le32 EaSize; /* EA size */
__le32 Reserved;
__u64 UniqueId; /* inode num - le since Samba puts ino in low 32 bit*/
__le64 UniqueId; /* inode num - le since Samba puts ino in low 32 bit*/
char FileName[1];
} __attribute__((packed)) SEARCH_ID_FULL_DIR_INFO; /* level 0x105 FF rsp data */

6
fs/cifs/cifssmb.c
View file

@ -1626,6 +1626,8 @@ CIFSSMBWrite2(const int xid, struct cifsTconInfo *tcon,
int smb_hdr_len;
int resp_buf_type = 0;
*nbytes = 0;
cFYI(1, ("write2 at %lld %d bytes", (long long)offset, count));
if (tcon->ses->capabilities & CAP_LARGE_FILES) {
@ -1682,11 +1684,9 @@ CIFSSMBWrite2(const int xid, struct cifsTconInfo *tcon,
cifs_stats_inc(&tcon->num_writes);
if (rc) {
cFYI(1, ("Send error Write2 = %d", rc));
*nbytes = 0;
} else if (resp_buf_type == 0) {
/* presumably this can not happen, but best to be safe */
rc = -EIO;
*nbytes = 0;
} else {
WRITE_RSP *pSMBr = (WRITE_RSP *)iov[0].iov_base;
*nbytes = le16_to_cpu(pSMBr->CountHigh);
@ -3918,7 +3918,7 @@ CIFSGetSrvInodeNumber(const int xid, struct cifsTconInfo *tcon,
}
pfinfo = (struct file_internal_info *)
(data_offset + (char *) &pSMBr->hdr.Protocol);
*inode_number = pfinfo->UniqueId;
*inode_number = le64_to_cpu(pfinfo->UniqueId);
}
}
GetInodeNumOut:

205
fs/cifs/connect.c
View file

@ -2214,9 +2214,58 @@ is_path_accessible(int xid, struct cifsTconInfo *tcon,
return rc;
}
static void
cleanup_volume_info(struct smb_vol **pvolume_info)
{
struct smb_vol *volume_info;
if (!pvolume_info && !*pvolume_info)
return;
volume_info = *pvolume_info;
kzfree(volume_info->password);
kfree(volume_info->UNC);
kfree(volume_info->prepath);
kfree(volume_info);
*pvolume_info = NULL;
return;
}
#ifdef CONFIG_CIFS_DFS_UPCALL
/* build_path_to_root returns full path to root when
* we do not have an exiting connection (tcon) */
static char *
build_unc_path_to_root(const struct smb_vol *volume_info,
const struct cifs_sb_info *cifs_sb)
{
char *full_path;
int unc_len = strnlen(volume_info->UNC, MAX_TREE_SIZE + 1);
full_path = kmalloc(unc_len + cifs_sb->prepathlen + 1, GFP_KERNEL);
if (full_path == NULL)
return ERR_PTR(-ENOMEM);
strncpy(full_path, volume_info->UNC, unc_len);
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) {
int i;
for (i = 0; i < unc_len; i++) {
if (full_path[i] == '\\')
full_path[i] = '/';
}
}
if (cifs_sb->prepathlen)
strncpy(full_path + unc_len, cifs_sb->prepath,
cifs_sb->prepathlen);
full_path[unc_len + cifs_sb->prepathlen] = 0; /* add trailing null */
return full_path;
}
#endif
int
cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
char *mount_data, const char *devname)
char *mount_data_global, const char *devname)
{
int rc = 0;
int xid;
@ -2225,6 +2274,13 @@ cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
struct cifsTconInfo *tcon = NULL;
struct TCP_Server_Info *srvTcp = NULL;
char *full_path;
char *mount_data = mount_data_global;
#ifdef CONFIG_CIFS_DFS_UPCALL
struct dfs_info3_param *referrals = NULL;
unsigned int num_referrals = 0;
try_mount_again:
#endif
full_path = NULL;
xid = GetXid();
@ -2371,11 +2427,9 @@ cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
}
}
/* check for null share name ie connect to dfs root */
if ((strchr(volume_info->UNC + 3, '\\') == NULL)
&& (strchr(volume_info->UNC + 3, '/') == NULL)) {
/* rc = connect_to_dfs_path(...) */
cFYI(1, ("DFS root not supported"));
cERROR(1, ("Missing share name"));
rc = -ENODEV;
goto mount_fail_check;
} else {
@ -2392,7 +2446,7 @@ cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
}
}
if (rc)
goto mount_fail_check;
goto remote_path_check;
tcon->seal = volume_info->seal;
write_lock(&cifs_tcp_ses_lock);
list_add(&tcon->tcon_list, &pSesInfo->tcon_list);
@ -2417,19 +2471,9 @@ cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
/* BB FIXME fix time_gran to be larger for LANMAN sessions */
sb->s_time_gran = 100;
mount_fail_check:
/* on error free sesinfo and tcon struct if needed */
if (rc) {
/* If find_unc succeeded then rc == 0 so we can not end */
/* up accidently freeing someone elses tcon struct */
if (tcon)
cifs_put_tcon(tcon);
else if (pSesInfo)
cifs_put_smb_ses(pSesInfo);
else
cifs_put_tcp_session(srvTcp);
goto out;
}
if (rc)
goto remote_path_check;
cifs_sb->tcon = tcon;
/* do not care if following two calls succeed - informational */
@ -2461,7 +2505,9 @@ cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
cifs_sb->rsize = min(cifs_sb->rsize,
(tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE));
if (!rc && cifs_sb->prepathlen) {
remote_path_check:
/* check if a whole path (including prepath) is not remote */
if (!rc && cifs_sb->prepathlen && tcon) {
/* build_path_to_root works only when we have a valid tcon */
full_path = cifs_build_path_to_root(cifs_sb);
if (full_path == NULL) {
@ -2469,31 +2515,79 @@ cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
goto mount_fail_check;
}
rc = is_path_accessible(xid, tcon, cifs_sb, full_path);
if (rc) {
cERROR(1, ("Path %s in not accessible: %d",
full_path, rc));
if (rc != -EREMOTE) {
kfree(full_path);
goto mount_fail_check;
}
kfree(full_path);
}
/* get referral if needed */
if (rc == -EREMOTE) {
#ifdef CONFIG_CIFS_DFS_UPCALL
/* convert forward to back slashes in prepath here if needed */
if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) == 0)
convert_delimiter(cifs_sb->prepath,
CIFS_DIR_SEP(cifs_sb));
full_path = build_unc_path_to_root(volume_info, cifs_sb);
if (IS_ERR(full_path)) {
rc = PTR_ERR(full_path);
goto mount_fail_check;
}
cFYI(1, ("Getting referral for: %s", full_path));
rc = get_dfs_path(xid, pSesInfo , full_path + 1,
cifs_sb->local_nls, &num_referrals, &referrals,
cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
if (!rc && num_referrals > 0) {
char *fake_devname = NULL;
if (mount_data != mount_data_global)
kfree(mount_data);
mount_data = cifs_compose_mount_options(
cifs_sb->mountdata, full_path + 1,
referrals, &fake_devname);
kfree(fake_devname);
free_dfs_info_array(referrals, num_referrals);
if (tcon)
cifs_put_tcon(tcon);
else if (pSesInfo)
cifs_put_smb_ses(pSesInfo);
cleanup_volume_info(&volume_info);
FreeXid(xid);
kfree(full_path);
goto try_mount_again;
}
#else /* No DFS support, return error on mount */
rc = -EOPNOTSUPP;
#endif
}
mount_fail_check:
/* on error free sesinfo and tcon struct if needed */
if (rc) {
if (mount_data != mount_data_global)
kfree(mount_data);
/* If find_unc succeeded then rc == 0 so we can not end */
/* up accidently freeing someone elses tcon struct */
if (tcon)
cifs_put_tcon(tcon);
else if (pSesInfo)
cifs_put_smb_ses(pSesInfo);
else
cifs_put_tcp_session(srvTcp);
goto out;
}
/* volume_info->password is freed above when existing session found
(in which case it is not needed anymore) but when new sesion is created
the password ptr is put in the new session structure (in which case the
password will be freed at unmount time) */
out:
/* zero out password before freeing */
if (volume_info) {
if (volume_info->password != NULL) {
memset(volume_info->password, 0,
strlen(volume_info->password));
kfree(volume_info->password);
}
kfree(volume_info->UNC);
kfree(volume_info->prepath);
kfree(volume_info);
}
cleanup_volume_info(&volume_info);
FreeXid(xid);
return rc;
}
@ -2673,8 +2767,7 @@ CIFSSessSetup(unsigned int xid, struct cifsSesInfo *ses,
/* We look for obvious messed up bcc or strings in response so we do not go off
the end since (at least) WIN2K and Windows XP have a major bug in not null
terminating last Unicode string in response */
if (ses->serverOS)
kfree(ses->serverOS);
kfree(ses->serverOS);
ses->serverOS = kzalloc(2 * (len + 1),
GFP_KERNEL);
if (ses->serverOS == NULL)
@ -2710,8 +2803,7 @@ CIFSSessSetup(unsigned int xid, struct cifsSesInfo *ses,
len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
/* last string is not always null terminated
(for e.g. for Windows XP & 2000) */
if (ses->serverDomain)
kfree(ses->serverDomain);
kfree(ses->serverDomain);
ses->serverDomain =
kzalloc(2*(len+1),
GFP_KERNEL);
@ -2725,8 +2817,7 @@ CIFSSessSetup(unsigned int xid, struct cifsSesInfo *ses,
ses->serverDomain[1+(2*len)] = 0;
} else { /* else no more room so create
dummy domain string */
if (ses->serverDomain)
kfree(ses->serverDomain);
kfree(ses->serverDomain);
ses->serverDomain =
kzalloc(2, GFP_KERNEL);
}
@ -2772,8 +2863,7 @@ CIFSSessSetup(unsigned int xid, struct cifsSesInfo *ses,
bcc_ptr++;
len = strnlen(bcc_ptr, 1024);
if (ses->serverDomain)
kfree(ses->serverDomain);
kfree(ses->serverDomain);
ses->serverDomain = kzalloc(len + 1,
GFP_KERNEL);
if (ses->serverDomain == NULL)
@ -3013,8 +3103,7 @@ CIFSNTLMSSPNegotiateSessSetup(unsigned int xid,
/* We look for obvious messed up bcc or strings in response so we do not go off
the end since (at least) WIN2K and Windows XP have a major bug in not null
terminating last Unicode string in response */
if (ses->serverOS)
kfree(ses->serverOS);
kfree(ses->serverOS);
ses->serverOS =
kzalloc(2 * (len + 1), GFP_KERNEL);
cifs_strfromUCS_le(ses->serverOS,
@ -3086,8 +3175,7 @@ CIFSNTLMSSPNegotiateSessSetup(unsigned int xid,
if (((long) bcc_ptr + len) - (long)
pByteArea(smb_buffer_response)
<= BCC(smb_buffer_response)) {
if (ses->serverOS)
kfree(ses->serverOS);
kfree(ses->serverOS);
ses->serverOS =
kzalloc(len + 1,
GFP_KERNEL);
@ -3414,8 +3502,7 @@ CIFSNTLMSSPAuthSessSetup(unsigned int xid, struct cifsSesInfo *ses,
/* We look for obvious messed up bcc or strings in response so we do not go off
the end since (at least) WIN2K and Windows XP have a major bug in not null
terminating last Unicode string in response */
if (ses->serverOS)
kfree(ses->serverOS);
kfree(ses->serverOS);
ses->serverOS =
kzalloc(2 * (len + 1), GFP_KERNEL);
cifs_strfromUCS_le(ses->serverOS,
@ -3448,8 +3535,7 @@ CIFSNTLMSSPAuthSessSetup(unsigned int xid, struct cifsSesInfo *ses,
if (remaining_words > 0) {
len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
/* last string not always null terminated (e.g. for Windows XP & 2000) */
if (ses->serverDomain)
kfree(ses->serverDomain);
kfree(ses->serverDomain);
ses->serverDomain =
kzalloc(2 *
(len +
@ -3476,13 +3562,11 @@ CIFSNTLMSSPAuthSessSetup(unsigned int xid, struct cifsSesInfo *ses,
= 0;
} /* else no more room so create dummy domain string */
else {
if (ses->serverDomain)
kfree(ses->serverDomain);
kfree(ses->serverDomain);
ses->serverDomain = kzalloc(2,GFP_KERNEL);
}
} else { /* no room so create dummy domain and NOS string */
if (ses->serverDomain)
kfree(ses->serverDomain);
kfree(ses->serverDomain);
ses->serverDomain = kzalloc(2, GFP_KERNEL);
kfree(ses->serverNOS);
ses->serverNOS = kzalloc(2, GFP_KERNEL);
@ -3492,8 +3576,7 @@ CIFSNTLMSSPAuthSessSetup(unsigned int xid, struct cifsSesInfo *ses,
if (((long) bcc_ptr + len) -
(long) pByteArea(smb_buffer_response)
<= BCC(smb_buffer_response)) {
if (ses->serverOS)
kfree(ses->serverOS);
kfree(ses->serverOS);
ses->serverOS = kzalloc(len + 1, GFP_KERNEL);
strncpy(ses->serverOS,bcc_ptr, len);
@ -3512,8 +3595,7 @@ CIFSNTLMSSPAuthSessSetup(unsigned int xid, struct cifsSesInfo *ses,
bcc_ptr++;
len = strnlen(bcc_ptr, 1024);
if (ses->serverDomain)
kfree(ses->serverDomain);
kfree(ses->serverDomain);
ses->serverDomain =
kzalloc(len+1,
GFP_KERNEL);
@ -3674,16 +3756,15 @@ CIFSTCon(unsigned int xid, struct cifsSesInfo *ses,
BCC(smb_buffer_response)) {
kfree(tcon->nativeFileSystem);
tcon->nativeFileSystem =
kzalloc(2*(length + 1), GFP_KERNEL);
if (tcon->nativeFileSystem)
kzalloc((4 * length) + 2, GFP_KERNEL);
if (tcon->nativeFileSystem) {
cifs_strfromUCS_le(
tcon->nativeFileSystem,
(__le16 *) bcc_ptr,
length, nls_codepage);
bcc_ptr += 2 * length;
bcc_ptr[0] = 0; /* null terminate the string */
bcc_ptr[1] = 0;
bcc_ptr += 2;
cFYI(1, ("nativeFileSystem=%s",
tcon->nativeFileSystem));
}
}
/* else do not bother copying these information fields*/
} else {

145
fs/cifs/dir.c
View file

@ -129,12 +129,62 @@ build_path_from_dentry(struct dentry *direntry)
return full_path;
}
static void
cifs_fill_fileinfo(struct inode *newinode, __u16 fileHandle,
struct cifsTconInfo *tcon, bool write_only)
{
int oplock = 0;
struct cifsFileInfo *pCifsFile;
struct cifsInodeInfo *pCifsInode;
pCifsFile = kzalloc(sizeof(struct cifsFileInfo), GFP_KERNEL);
if (pCifsFile == NULL)
return;
if (oplockEnabled)
oplock = REQ_OPLOCK;
pCifsFile->netfid = fileHandle;
pCifsFile->pid = current->tgid;
pCifsFile->pInode = newinode;
pCifsFile->invalidHandle = false;
pCifsFile->closePend = false;
mutex_init(&pCifsFile->fh_mutex);
mutex_init(&pCifsFile->lock_mutex);
INIT_LIST_HEAD(&pCifsFile->llist);
atomic_set(&pCifsFile->wrtPending, 0);
/* set the following in open now
pCifsFile->pfile = file; */
write_lock(&GlobalSMBSeslock);
list_add(&pCifsFile->tlist, &tcon->openFileList);
pCifsInode = CIFS_I(newinode);
if (pCifsInode) {
/* if readable file instance put first in list*/
if (write_only)
list_add_tail(&pCifsFile->flist,
&pCifsInode->openFileList);
else
list_add(&pCifsFile->flist, &pCifsInode->openFileList);
if ((oplock & 0xF) == OPLOCK_EXCLUSIVE) {
pCifsInode->clientCanCacheAll = true;
pCifsInode->clientCanCacheRead = true;
cFYI(1, ("Exclusive Oplock inode %p", newinode));
} else if ((oplock & 0xF) == OPLOCK_READ)
pCifsInode->clientCanCacheRead = true;
}
write_unlock(&GlobalSMBSeslock);
}
int cifs_posix_open(char *full_path, struct inode **pinode,
struct super_block *sb, int mode, int oflags,
int *poplock, __u16 *pnetfid, int xid)
{
int rc;
__u32 oplock;
bool write_only = false;
FILE_UNIX_BASIC_INFO *presp_data;
__u32 posix_flags = 0;
struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
@ -172,6 +222,8 @@ int cifs_posix_open(char *full_path, struct inode **pinode,
if (oflags & O_DIRECT)
posix_flags |= SMB_O_DIRECT;
if (!(oflags & FMODE_READ))
write_only = true;
rc = CIFSPOSIXCreate(xid, cifs_sb->tcon, posix_flags, mode,
pnetfid, presp_data, &oplock, full_path,
@ -187,8 +239,10 @@ int cifs_posix_open(char *full_path, struct inode **pinode,
if (!pinode)
goto posix_open_ret; /* caller does not need info */
if (*pinode == NULL)
*pinode = cifs_new_inode(sb, &presp_data->UniqueId);
if (*pinode == NULL) {
__u64 unique_id = le64_to_cpu(presp_data->UniqueId);
*pinode = cifs_new_inode(sb, &unique_id);
}
/* else an inode was passed in. Update its info, don't create one */
/* We do not need to close the file if new_inode fails since
@ -198,6 +252,8 @@ int cifs_posix_open(char *full_path, struct inode **pinode,
posix_fill_in_inode(*pinode, presp_data, 1);
cifs_fill_fileinfo(*pinode, *pnetfid, cifs_sb->tcon, write_only);
posix_open_ret:
kfree(presp_data);
return rc;
@ -239,7 +295,6 @@ cifs_create(struct inode *inode, struct dentry *direntry, int mode,
char *full_path = NULL;
FILE_ALL_INFO *buf = NULL;
struct inode *newinode = NULL;
struct cifsInodeInfo *pCifsInode;
int disposition = FILE_OVERWRITE_IF;
bool write_only = false;
@ -410,44 +465,8 @@ cifs_create(struct inode *inode, struct dentry *direntry, int mode,
/* mknod case - do not leave file open */
CIFSSMBClose(xid, tcon, fileHandle);
} else if (newinode) {
struct cifsFileInfo *pCifsFile =
kzalloc(sizeof(struct cifsFileInfo), GFP_KERNEL);
if (pCifsFile == NULL)
goto cifs_create_out;
pCifsFile->netfid = fileHandle;
pCifsFile->pid = current->tgid;
pCifsFile->pInode = newinode;
pCifsFile->invalidHandle = false;
pCifsFile->closePend = false;
init_MUTEX(&pCifsFile->fh_sem);
mutex_init(&pCifsFile->lock_mutex);
INIT_LIST_HEAD(&pCifsFile->llist);
atomic_set(&pCifsFile->wrtPending, 0);
/* set the following in open now
pCifsFile->pfile = file; */
write_lock(&GlobalSMBSeslock);
list_add(&pCifsFile->tlist, &tcon->openFileList);
pCifsInode = CIFS_I(newinode);
if (pCifsInode) {
/* if readable file instance put first in list*/
if (write_only) {
list_add_tail(&pCifsFile->flist,
&pCifsInode->openFileList);
} else {
list_add(&pCifsFile->flist,
&pCifsInode->openFileList);
}
if ((oplock & 0xF) == OPLOCK_EXCLUSIVE) {
pCifsInode->clientCanCacheAll = true;
pCifsInode->clientCanCacheRead = true;
cFYI(1, ("Exclusive Oplock inode %p",
newinode));
} else if ((oplock & 0xF) == OPLOCK_READ)
pCifsInode->clientCanCacheRead = true;
}
write_unlock(&GlobalSMBSeslock);
cifs_fill_fileinfo(newinode, fileHandle,
cifs_sb->tcon, write_only);
}
cifs_create_out:
kfree(buf);
@ -580,17 +599,21 @@ int cifs_mknod(struct inode *inode, struct dentry *direntry, int mode,
return rc;
}
struct dentry *
cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry,
struct nameidata *nd)
{
int xid;
int rc = 0; /* to get around spurious gcc warning, set to zero here */
int oplock = 0;
int mode;
__u16 fileHandle = 0;
bool posix_open = false;
struct cifs_sb_info *cifs_sb;
struct cifsTconInfo *pTcon;
struct inode *newInode = NULL;
char *full_path = NULL;
struct file *filp;
xid = GetXid();
@ -632,12 +655,37 @@ cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry,
}
cFYI(1, ("Full path: %s inode = 0x%p", full_path, direntry->d_inode));
if (pTcon->unix_ext)
rc = cifs_get_inode_info_unix(&newInode, full_path,
parent_dir_inode->i_sb, xid);
else
if (pTcon->unix_ext) {
if (!(nd->flags & (LOOKUP_PARENT | LOOKUP_DIRECTORY)) &&
(nd->flags & LOOKUP_OPEN)) {
if (!((nd->intent.open.flags & O_CREAT) &&
(nd->intent.open.flags & O_EXCL))) {
mode = nd->intent.open.create_mode &
~current_umask();
rc = cifs_posix_open(full_path, &newInode,
parent_dir_inode->i_sb, mode,
nd->intent.open.flags, &oplock,
&fileHandle, xid);
/*
* This code works around a bug in
* samba posix open in samba versions 3.3.1
* and earlier where create works
* but open fails with invalid parameter.
* If either of these error codes are
* returned, follow the normal lookup.
* Otherwise, the error during posix open
* is handled.
*/
if ((rc != -EINVAL) && (rc != -EOPNOTSUPP))
posix_open = true;
}
}
if (!posix_open)
rc = cifs_get_inode_info_unix(&newInode, full_path,
parent_dir_inode->i_sb, xid);
} else
rc = cifs_get_inode_info(&newInode, full_path, NULL,
parent_dir_inode->i_sb, xid, NULL);
parent_dir_inode->i_sb, xid, NULL);
if ((rc == 0) && (newInode != NULL)) {
if (pTcon->nocase)
@ -645,7 +693,8 @@ cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry,
else
direntry->d_op = &cifs_dentry_ops;
d_add(direntry, newInode);
if (posix_open)
filp = lookup_instantiate_filp(nd, direntry, NULL);
/* since paths are not looked up by component - the parent
directories are presumed to be good here */
renew_parental_timestamps(direntry);

2
fs/cifs/dns_resolve.c
View file

@ -78,7 +78,7 @@ dns_resolver_instantiate(struct key *key, const void *data,
}
key->type_data.x[0] = datalen;
rcu_assign_pointer(key->payload.data, ip);
key->payload.data = ip;
return rc;
}

123
fs/cifs/file.c
View file

@ -46,7 +46,7 @@ static inline struct cifsFileInfo *cifs_init_private(
memset(private_data, 0, sizeof(struct cifsFileInfo));
private_data->netfid = netfid;
private_data->pid = current->tgid;
init_MUTEX(&private_data->fh_sem);
mutex_init(&private_data->fh_mutex);
mutex_init(&private_data->lock_mutex);
INIT_LIST_HEAD(&private_data->llist);
private_data->pfile = file; /* needed for writepage */
@ -284,35 +284,32 @@ int cifs_open(struct inode *inode, struct file *file)
cifs_sb = CIFS_SB(inode->i_sb);
tcon = cifs_sb->tcon;
if (file->f_flags & O_CREAT) {
/* search inode for this file and fill in file->private_data */
pCifsInode = CIFS_I(file->f_path.dentry->d_inode);
read_lock(&GlobalSMBSeslock);
list_for_each(tmp, &pCifsInode->openFileList) {
pCifsFile = list_entry(tmp, struct cifsFileInfo,
flist);
if ((pCifsFile->pfile == NULL) &&
(pCifsFile->pid == current->tgid)) {
/* mode set in cifs_create */
/* search inode for this file and fill in file->private_data */
pCifsInode = CIFS_I(file->f_path.dentry->d_inode);
read_lock(&GlobalSMBSeslock);
list_for_each(tmp, &pCifsInode->openFileList) {
pCifsFile = list_entry(tmp, struct cifsFileInfo,
flist);
if ((pCifsFile->pfile == NULL) &&
(pCifsFile->pid == current->tgid)) {
/* mode set in cifs_create */
/* needed for writepage */
pCifsFile->pfile = file;
/* needed for writepage */
pCifsFile->pfile = file;
file->private_data = pCifsFile;
break;
}
}
read_unlock(&GlobalSMBSeslock);
if (file->private_data != NULL) {
rc = 0;
FreeXid(xid);
return rc;
} else {
if (file->f_flags & O_EXCL)
cERROR(1, ("could not find file instance for "
"new file %p", file));
file->private_data = pCifsFile;
break;
}
}
read_unlock(&GlobalSMBSeslock);
if (file->private_data != NULL) {
rc = 0;
FreeXid(xid);
return rc;
} else if ((file->f_flags & O_CREAT) && (file->f_flags & O_EXCL))
cERROR(1, ("could not find file instance for "
"new file %p", file));
full_path = build_path_from_dentry(file->f_path.dentry);
if (full_path == NULL) {
@ -500,9 +497,9 @@ static int cifs_reopen_file(struct file *file, bool can_flush)
return -EBADF;
xid = GetXid();
down(&pCifsFile->fh_sem);
mutex_unlock(&pCifsFile->fh_mutex);
if (!pCifsFile->invalidHandle) {
up(&pCifsFile->fh_sem);
mutex_lock(&pCifsFile->fh_mutex);
FreeXid(xid);
return 0;
}
@ -533,7 +530,7 @@ static int cifs_reopen_file(struct file *file, bool can_flush)
if (full_path == NULL) {
rc = -ENOMEM;
reopen_error_exit:
up(&pCifsFile->fh_sem);
mutex_lock(&pCifsFile->fh_mutex);
FreeXid(xid);
return rc;
}
@ -575,14 +572,14 @@ static int cifs_reopen_file(struct file *file, bool can_flush)
cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
CIFS_MOUNT_MAP_SPECIAL_CHR);
if (rc) {
up(&pCifsFile->fh_sem);
mutex_lock(&pCifsFile->fh_mutex);
cFYI(1, ("cifs_open returned 0x%x", rc));
cFYI(1, ("oplock: %d", oplock));
} else {
reopen_success:
pCifsFile->netfid = netfid;
pCifsFile->invalidHandle = false;
up(&pCifsFile->fh_sem);
mutex_lock(&pCifsFile->fh_mutex);
pCifsInode = CIFS_I(inode);
if (pCifsInode) {
if (can_flush) {
@ -971,6 +968,40 @@ int cifs_lock(struct file *file, int cmd, struct file_lock *pfLock)
return rc;
}
/*
* Set the timeout on write requests past EOF. For some servers (Windows)
* these calls can be very long.
*
* If we're writing >10M past the EOF we give a 180s timeout. Anything less
* than that gets a 45s timeout. Writes not past EOF get 15s timeouts.
* The 10M cutoff is totally arbitrary. A better scheme for this would be
* welcome if someone wants to suggest one.
*
* We may be able to do a better job with this if there were some way to
* declare that a file should be sparse.
*/
static int
cifs_write_timeout(struct cifsInodeInfo *cifsi, loff_t offset)
{
if (offset <= cifsi->server_eof)
return CIFS_STD_OP;
else if (offset > (cifsi->server_eof + (10 * 1024 * 1024)))
return CIFS_VLONG_OP;
else
return CIFS_LONG_OP;
}
/* update the file size (if needed) after a write */
static void
cifs_update_eof(struct cifsInodeInfo *cifsi, loff_t offset,
unsigned int bytes_written)
{
loff_t end_of_write = offset + bytes_written;
if (end_of_write > cifsi->server_eof)
cifsi->server_eof = end_of_write;
}
ssize_t cifs_user_write(struct file *file, const char __user *write_data,
size_t write_size, loff_t *poffset)
{
@ -981,6 +1012,7 @@ ssize_t cifs_user_write(struct file *file, const char __user *write_data,
struct cifsTconInfo *pTcon;
int xid, long_op;
struct cifsFileInfo *open_file;
struct cifsInodeInfo *cifsi = CIFS_I(file->f_path.dentry->d_inode);
cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
@ -1000,11 +1032,7 @@ ssize_t cifs_user_write(struct file *file, const char __user *write_data,
xid = GetXid();
if (*poffset > file->f_path.dentry->d_inode->i_size)
long_op = CIFS_VLONG_OP; /* writes past EOF take long time */
else
long_op = CIFS_LONG_OP;
long_op = cifs_write_timeout(cifsi, *poffset);
for (total_written = 0; write_size > total_written;
total_written += bytes_written) {
rc = -EAGAIN;
@ -1048,8 +1076,10 @@ ssize_t cifs_user_write(struct file *file, const char __user *write_data,
FreeXid(xid);
return rc;
}
} else
} else {
cifs_update_eof(cifsi, *poffset, bytes_written);
*poffset += bytes_written;
}
long_op = CIFS_STD_OP; /* subsequent writes fast -
15 seconds is plenty */
}
@ -1085,6 +1115,7 @@ static ssize_t cifs_write(struct file *file, const char *write_data,
struct cifsTconInfo *pTcon;
int xid, long_op;
struct cifsFileInfo *open_file;
struct cifsInodeInfo *cifsi = CIFS_I(file->f_path.dentry->d_inode);
cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
@ -1099,11 +1130,7 @@ static ssize_t cifs_write(struct file *file, const char *write_data,
xid = GetXid();
if (*poffset > file->f_path.dentry->d_inode->i_size)
long_op = CIFS_VLONG_OP; /* writes past EOF can be slow */
else
long_op = CIFS_LONG_OP;
long_op = cifs_write_timeout(cifsi, *poffset);
for (total_written = 0; write_size > total_written;
total_written += bytes_written) {
rc = -EAGAIN;
@ -1166,8 +1193,10 @@ static ssize_t cifs_write(struct file *file, const char *write_data,
FreeXid(xid);
return rc;
}
} else
} else {
cifs_update_eof(cifsi, *poffset, bytes_written);
*poffset += bytes_written;
}
long_op = CIFS_STD_OP; /* subsequent writes fast -
15 seconds is plenty */
}
@ -1380,11 +1409,12 @@ static int cifs_writepages(struct address_space *mapping,
int nr_pages;
__u64 offset = 0;
struct cifsFileInfo *open_file;
struct cifsInodeInfo *cifsi = CIFS_I(mapping->host);
struct page *page;
struct pagevec pvec;
int rc = 0;
int scanned = 0;
int xid;
int xid, long_op;
cifs_sb = CIFS_SB(mapping->host->i_sb);
@ -1528,12 +1558,15 @@ static int cifs_writepages(struct address_space *mapping,
cERROR(1, ("No writable handles for inode"));
rc = -EBADF;
} else {
long_op = cifs_write_timeout(cifsi, offset);
rc = CIFSSMBWrite2(xid, cifs_sb->tcon,
open_file->netfid,
bytes_to_write, offset,
&bytes_written, iov, n_iov,
CIFS_LONG_OP);
long_op);
atomic_dec(&open_file->wrtPending);
cifs_update_eof(cifsi, offset, bytes_written);
if (rc || bytes_written < bytes_to_write) {
cERROR(1, ("Write2 ret %d, wrote %d",
rc, bytes_written));

77
fs/cifs/inode.c
View file

@ -143,6 +143,7 @@ static void cifs_unix_info_to_inode(struct inode *inode,
inode->i_nlink = le64_to_cpu(info->Nlinks);
cifsInfo->server_eof = end_of_file;
spin_lock(&inode->i_lock);
if (is_size_safe_to_change(cifsInfo, end_of_file)) {
/*
@ -276,7 +277,8 @@ int cifs_get_inode_info_unix(struct inode **pinode,
/* get new inode */
if (*pinode == NULL) {
*pinode = cifs_new_inode(sb, &find_data.UniqueId);
__u64 unique_id = le64_to_cpu(find_data.UniqueId);
*pinode = cifs_new_inode(sb, &unique_id);
if (*pinode == NULL) {
rc = -ENOMEM;
goto cgiiu_exit;
@ -605,12 +607,12 @@ int cifs_get_inode_info(struct inode **pinode,
inode->i_mode |= S_IFREG;
}
cifsInfo->server_eof = le64_to_cpu(pfindData->EndOfFile);
spin_lock(&inode->i_lock);
if (is_size_safe_to_change(cifsInfo,
le64_to_cpu(pfindData->EndOfFile))) {
if (is_size_safe_to_change(cifsInfo, cifsInfo->server_eof)) {
/* can not safely shrink the file size here if the
client is writing to it due to potential races */
i_size_write(inode, le64_to_cpu(pfindData->EndOfFile));
i_size_write(inode, cifsInfo->server_eof);
/* 512 bytes (2**9) is the fake blocksize that must be
used for this calculation */
@ -1138,6 +1140,7 @@ int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode)
cFYI(1, ("posix mkdir returned 0x%x", rc));
d_drop(direntry);
} else {
__u64 unique_id;
if (pInfo->Type == cpu_to_le32(-1)) {
/* no return info, go query for it */
kfree(pInfo);
@ -1151,8 +1154,8 @@ int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode)
else
direntry->d_op = &cifs_dentry_ops;
newinode = cifs_new_inode(inode->i_sb,
&pInfo->UniqueId);
unique_id = le64_to_cpu(pInfo->UniqueId);
newinode = cifs_new_inode(inode->i_sb, &unique_id);
if (newinode == NULL) {
kfree(pInfo);
goto mkdir_get_info;
@ -1450,7 +1453,8 @@ int cifs_rename(struct inode *source_dir, struct dentry *source_dentry,
checking the UniqueId via FILE_INTERNAL_INFO */
unlink_target:
if ((rc == -EACCES) || (rc == -EEXIST)) {
/* Try unlinking the target dentry if it's not negative */
if (target_dentry->d_inode && (rc == -EACCES || rc == -EEXIST)) {
tmprc = cifs_unlink(target_dir, target_dentry);
if (tmprc)
goto cifs_rename_exit;
@ -1753,6 +1757,7 @@ cifs_set_file_size(struct inode *inode, struct iattr *attrs,
}
if (rc == 0) {
cifsInode->server_eof = attrs->ia_size;
rc = cifs_vmtruncate(inode, attrs->ia_size);
cifs_truncate_page(inode->i_mapping, inode->i_size);
}
@ -1792,20 +1797,21 @@ cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs)
goto out;
}
if ((attrs->ia_valid & ATTR_MTIME) || (attrs->ia_valid & ATTR_SIZE)) {
/*
Flush data before changing file size or changing the last
write time of the file on the server. If the
flush returns error, store it to report later and continue.
BB: This should be smarter. Why bother flushing pages that
will be truncated anyway? Also, should we error out here if
the flush returns error?
*/
rc = filemap_write_and_wait(inode->i_mapping);
if (rc != 0) {
cifsInode->write_behind_rc = rc;
rc = 0;
}
/*
* Attempt to flush data before changing attributes. We need to do
* this for ATTR_SIZE and ATTR_MTIME for sure, and if we change the
* ownership or mode then we may also need to do this. Here, we take
* the safe way out and just do the flush on all setattr requests. If
* the flush returns error, store it to report later and continue.
*
* BB: This should be smarter. Why bother flushing pages that
* will be truncated anyway? Also, should we error out here if
* the flush returns error?
*/
rc = filemap_write_and_wait(inode->i_mapping);
if (rc != 0) {
cifsInode->write_behind_rc = rc;
rc = 0;
}
if (attrs->ia_valid & ATTR_SIZE) {
@ -1903,20 +1909,21 @@ cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs)
return -ENOMEM;
}
if ((attrs->ia_valid & ATTR_MTIME) || (attrs->ia_valid & ATTR_SIZE)) {
/*
Flush data before changing file size or changing the last
write time of the file on the server. If the
flush returns error, store it to report later and continue.
BB: This should be smarter. Why bother flushing pages that
will be truncated anyway? Also, should we error out here if
the flush returns error?
*/
rc = filemap_write_and_wait(inode->i_mapping);
if (rc != 0) {
cifsInode->write_behind_rc = rc;
rc = 0;
}
/*
* Attempt to flush data before changing attributes. We need to do
* this for ATTR_SIZE and ATTR_MTIME for sure, and if we change the
* ownership or mode then we may also need to do this. Here, we take
* the safe way out and just do the flush on all setattr requests. If
* the flush returns error, store it to report later and continue.
*
* BB: This should be smarter. Why bother flushing pages that
* will be truncated anyway? Also, should we error out here if
* the flush returns error?
*/
rc = filemap_write_and_wait(inode->i_mapping);
if (rc != 0) {
cifsInode->write_behind_rc = rc;
rc = 0;
}
if (attrs->ia_valid & ATTR_SIZE) {

6
fs/cifs/readdir.c
View file

@ -239,6 +239,7 @@ static void fill_in_inode(struct inode *tmp_inode, int new_buf_type,
if (atomic_read(&cifsInfo->inUse) == 0)
atomic_set(&cifsInfo->inUse, 1);
cifsInfo->server_eof = end_of_file;
spin_lock(&tmp_inode->i_lock);
if (is_size_safe_to_change(cifsInfo, end_of_file)) {
/* can not safely change the file size here if the
@ -375,6 +376,7 @@ static void unix_fill_in_inode(struct inode *tmp_inode,
tmp_inode->i_gid = le64_to_cpu(pfindData->Gid);
tmp_inode->i_nlink = le64_to_cpu(pfindData->Nlinks);
cifsInfo->server_eof = end_of_file;
spin_lock(&tmp_inode->i_lock);
if (is_size_safe_to_change(cifsInfo, end_of_file)) {
/* can not safely change the file size here if the
@ -840,7 +842,7 @@ static int cifs_get_name_from_search_buf(struct qstr *pqst,
len = strnlen(filename, PATH_MAX);
}
*pinum = pFindData->UniqueId;
*pinum = le64_to_cpu(pFindData->UniqueId);
} else if (level == SMB_FIND_FILE_DIRECTORY_INFO) {
FILE_DIRECTORY_INFO *pFindData =
(FILE_DIRECTORY_INFO *)current_entry;
@ -856,7 +858,7 @@ static int cifs_get_name_from_search_buf(struct qstr *pqst,
(SEARCH_ID_FULL_DIR_INFO *)current_entry;
filename = &pFindData->FileName[0];
len = le32_to_cpu(pFindData->FileNameLength);
*pinum = pFindData->UniqueId;
*pinum = le64_to_cpu(pFindData->UniqueId);
} else if (level == SMB_FIND_FILE_BOTH_DIRECTORY_INFO) {
FILE_BOTH_DIRECTORY_INFO *pFindData =
(FILE_BOTH_DIRECTORY_INFO *)current_entry;

47
fs/cifs/sess.c
View file

@ -285,35 +285,36 @@ static int decode_unicode_ssetup(char **pbcc_area, int bleft,
int words_left, len;
char *data = *pbcc_area;
cFYI(1, ("bleft %d", bleft));
/* SMB header is unaligned, so cifs servers word align start of
Unicode strings */
data++;
bleft--; /* Windows servers do not always double null terminate
their final Unicode string - in which case we
now will not attempt to decode the byte of junk
which follows it */
/*
* Windows servers do not always double null terminate their final
* Unicode string. Check to see if there are an uneven number of bytes
* left. If so, then add an extra NULL pad byte to the end of the
* response.
*
* See section 2.7.2 in "Implementing CIFS" for details
*/
if (bleft % 2) {
data[bleft] = 0;
++bleft;
}
words_left = bleft / 2;
/* save off server operating system */
len = UniStrnlen((wchar_t *) data, words_left);
/* We look for obvious messed up bcc or strings in response so we do not go off
the end since (at least) WIN2K and Windows XP have a major bug in not null
terminating last Unicode string in response */
if (len >= words_left)
return rc;
kfree(ses->serverOS);
/* UTF-8 string will not grow more than four times as big as UCS-16 */
ses->serverOS = kzalloc((4 * len) + 2 /* trailing null */, GFP_KERNEL);
if (ses->serverOS != NULL)
if (ses->serverOS != NULL) {
cifs_strfromUCS_le(ses->serverOS, (__le16 *)data, len, nls_cp);
cFYI(1, ("serverOS=%s", ses->serverOS));
}
data += 2 * (len + 1);
words_left -= len + 1;
@ -328,6 +329,7 @@ static int decode_unicode_ssetup(char **pbcc_area, int bleft,
if (ses->serverNOS != NULL) {
cifs_strfromUCS_le(ses->serverNOS, (__le16 *)data, len,
nls_cp);
cFYI(1, ("serverNOS=%s", ses->serverNOS));
if (strncmp(ses->serverNOS, "NT LAN Manager 4", 16) == 0) {
cFYI(1, ("NT4 server"));
ses->flags |= CIFS_SES_NT4;
@ -343,12 +345,11 @@ static int decode_unicode_ssetup(char **pbcc_area, int bleft,
return rc;
kfree(ses->serverDomain);
ses->serverDomain = kzalloc(2 * (len + 1), GFP_KERNEL); /* BB FIXME wrong length */
ses->serverDomain = kzalloc((4 * len) + 2, GFP_KERNEL);
if (ses->serverDomain != NULL) {
cifs_strfromUCS_le(ses->serverDomain, (__le16 *)data, len,
nls_cp);
ses->serverDomain[2*len] = 0;
ses->serverDomain[(2*len) + 1] = 0;
cFYI(1, ("serverDomain=%s", ses->serverDomain));
}
data += 2 * (len + 1);
words_left -= len + 1;
@ -702,12 +703,18 @@ CIFS_SessSetup(unsigned int xid, struct cifsSesInfo *ses, int first_time,
}
/* BB check if Unicode and decode strings */
if (smb_buf->Flags2 & SMBFLG2_UNICODE)
if (smb_buf->Flags2 & SMBFLG2_UNICODE) {
/* unicode string area must be word-aligned */
if (((unsigned long) bcc_ptr - (unsigned long) smb_buf) % 2) {
++bcc_ptr;
--bytes_remaining;
}
rc = decode_unicode_ssetup(&bcc_ptr, bytes_remaining,
ses, nls_cp);
else
ses, nls_cp);
} else {
rc = decode_ascii_ssetup(&bcc_ptr, bytes_remaining,
ses, nls_cp);
}
ssetup_exit:
if (spnego_key) {