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Commit 4846546f authored by Linus Torvalds's avatar Linus Torvalds
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Merge git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6 

* git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6:
  [CIFS] pSesInfo->sesSem is used as mutex. Rename it to session_mutex and
  [CIFS] Use unsigned ea length for clarity
  cifs: set server_eof in cifs_fattr_to_inode
  [CIFS] Minor cleanup to EA patch
  cifs: merge CIFSSMBQueryEA with CIFSSMBQAllEAs
  cifs: verify lengths of QueryAllEAs reply
  cifs: increase maximum buffer size in CIFSSMBQAllEAs
  cifs: rename name_len to list_len in CIFSSMBQAllEAs
  cifs: clean up indentation in CIFSSMBQAllEAs
  cifs: add parens around smb_var in BCC macros
parents 832d30ca d7b619cf
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Showing with 145 additions and 254 deletions
fs/cifs/CHANGES
View file @ 4846546f
Version 1.62
------------
Add sockopt=TCP_NODELAY mount option.
Add sockopt=TCP_NODELAY mount option. EA (xattr) routines hardened
to more strictly handle corrupt frames.
Version 1.61
------------
......
fs/cifs/cifsglob.h
View file @ 4846546f
......@@ -205,7 +205,7 @@ struct cifsUidInfo {
struct cifsSesInfo {
struct list_head smb_ses_list;
struct list_head tcon_list;
struct semaphore sesSem;
struct mutex session_mutex;
#if 0
struct cifsUidInfo *uidInfo; /* pointer to user info */
#endif
......
fs/cifs/cifspdu.h
View file @ 4846546f
......@@ -415,10 +415,10 @@ struct smb_hdr {
__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)))
#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 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) ((unsigned char *)(smb_var) + sizeof(struct smb_hdr) + (2 * (smb_var)->WordCount) + 2)
/*
* Computer Name Length (since Netbios name was length 16 with last byte 0x20)
......
fs/cifs/cifsproto.h
View file @ 4846546f
......@@ -363,13 +363,10 @@ extern int CIFSSMBNotify(const int xid, struct cifsTconInfo *tcon,
__u32 filter, struct file *file, int multishot,
const struct nls_table *nls_codepage);
extern ssize_t CIFSSMBQAllEAs(const int xid, struct cifsTconInfo *tcon,
const unsigned char *searchName, char *EAData,
const unsigned char *searchName,
const unsigned char *ea_name, char *EAData,
size_t bufsize, const struct nls_table *nls_codepage,
int remap_special_chars);
extern ssize_t CIFSSMBQueryEA(const int xid, struct cifsTconInfo *tcon,
const unsigned char *searchName, const unsigned char *ea_name,
unsigned char *ea_value, size_t buf_size,
const struct nls_table *nls_codepage, int remap_special_chars);
extern int CIFSSMBSetEA(const int xid, struct cifsTconInfo *tcon,
const char *fileName, const char *ea_name,
const void *ea_value, const __u16 ea_value_len,
......
fs/cifs/cifssmb.c
View file @ 4846546f
......@@ -170,19 +170,19 @@ cifs_reconnect_tcon(struct cifsTconInfo *tcon, int smb_command)
* need to prevent multiple threads trying to simultaneously
* reconnect the same SMB session
*/
down(&ses->sesSem);
mutex_lock(&ses->session_mutex);
if (ses->need_reconnect)
rc = cifs_setup_session(0, ses, nls_codepage);
/* do we need to reconnect tcon? */
if (rc || !tcon->need_reconnect) {
up(&ses->sesSem);
mutex_unlock(&ses->session_mutex);
goto out;
}
mark_open_files_invalid(tcon);
rc = CIFSTCon(0, ses, tcon->treeName, tcon, nls_codepage);
up(&ses->sesSem);
mutex_unlock(&ses->session_mutex);
cFYI(1, ("reconnect tcon rc = %d", rc));
if (rc)
......@@ -700,13 +700,13 @@ CIFSSMBLogoff(const int xid, struct cifsSesInfo *ses)
if (!ses || !ses->server)
return -EIO;
down(&ses->sesSem);
mutex_lock(&ses->session_mutex);
if (ses->need_reconnect)
goto session_already_dead; /* no need to send SMBlogoff if uid
already closed due to reconnect */
rc = small_smb_init(SMB_COM_LOGOFF_ANDX, 2, NULL, (void **)&pSMB);
if (rc) {
up(&ses->sesSem);
mutex_unlock(&ses->session_mutex);
return rc;
}
......@@ -721,7 +721,7 @@ CIFSSMBLogoff(const int xid, struct cifsSesInfo *ses)
pSMB->AndXCommand = 0xFF;
rc = SendReceiveNoRsp(xid, ses, (struct smb_hdr *) pSMB, 0);
session_already_dead:
up(&ses->sesSem);
mutex_unlock(&ses->session_mutex);
/* if session dead then we do not need to do ulogoff,
since server closed smb session, no sense reporting
......@@ -5269,22 +5269,34 @@ int CIFSSMBNotify(const int xid, struct cifsTconInfo *tcon,
cifs_buf_release(pSMB);
return rc;
}
#ifdef CONFIG_CIFS_XATTR
/*
* Do a path-based QUERY_ALL_EAS call and parse the result. This is a common
* function used by listxattr and getxattr type calls. When ea_name is set,
* it looks for that attribute name and stuffs that value into the EAData
* buffer. When ea_name is NULL, it stuffs a list of attribute names into the
* buffer. In both cases, the return value is either the length of the
* resulting data or a negative error code. If EAData is a NULL pointer then
* the data isn't copied to it, but the length is returned.
*/
ssize_t
CIFSSMBQAllEAs(const int xid, struct cifsTconInfo *tcon,
const unsigned char *searchName,
char *EAData, size_t buf_size,
const struct nls_table *nls_codepage, int remap)
const unsigned char *searchName, const unsigned char *ea_name,
char *EAData, size_t buf_size,
const struct nls_table *nls_codepage, int remap)
{
/* BB assumes one setup word */
TRANSACTION2_QPI_REQ *pSMB = NULL;
TRANSACTION2_QPI_RSP *pSMBr = NULL;
int rc = 0;
int bytes_returned;
int name_len;
int list_len;
struct fealist *ea_response_data;
struct fea *temp_fea;
char *temp_ptr;
__u16 params, byte_count;
char *end_of_smb;
__u16 params, byte_count, data_offset;
cFYI(1, ("In Query All EAs path %s", searchName));
QAllEAsRetry:
......@@ -5294,22 +5306,22 @@ CIFSSMBQAllEAs(const int xid, struct cifsTconInfo *tcon,
return rc;
if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
name_len =
list_len =
cifsConvertToUCS((__le16 *) pSMB->FileName, searchName,
PATH_MAX, nls_codepage, remap);
name_len++; /* trailing null */
name_len *= 2;
list_len++; /* trailing null */
list_len *= 2;
} else { /* BB improve the check for buffer overruns BB */
name_len = strnlen(searchName, PATH_MAX);
name_len++; /* trailing null */
strncpy(pSMB->FileName, searchName, name_len);
list_len = strnlen(searchName, PATH_MAX);
list_len++; /* trailing null */
strncpy(pSMB->FileName, searchName, list_len);
}
params = 2 /* level */ + 4 /* reserved */ + name_len /* includes NUL */;
params = 2 /* level */ + 4 /* reserved */ + list_len /* includes NUL */;
pSMB->TotalDataCount = 0;
pSMB->MaxParameterCount = cpu_to_le16(2);
/* BB find exact max SMB PDU from sess structure BB */
pSMB->MaxDataCount = cpu_to_le16(4000);
pSMB->MaxDataCount = cpu_to_le16(CIFSMaxBufSize);
pSMB->MaxSetupCount = 0;
pSMB->Reserved = 0;
pSMB->Flags = 0;
......@@ -5334,237 +5346,117 @@ CIFSSMBQAllEAs(const int xid, struct cifsTconInfo *tcon,
(struct smb_hdr *) pSMBr, &bytes_returned, 0);
if (rc) {
cFYI(1, ("Send error in QueryAllEAs = %d", rc));
} else { /* decode response */
rc = validate_t2((struct smb_t2_rsp *)pSMBr);
goto QAllEAsOut;
}
/* BB also check enough total bytes returned */
/* BB we need to improve the validity checking
of these trans2 responses */
if (rc || (pSMBr->ByteCount < 4))
rc = -EIO; /* bad smb */
/* else if (pFindData){
memcpy((char *) pFindData,
(char *) &pSMBr->hdr.Protocol +
data_offset, kl);
}*/ else {
/* check that length of list is not more than bcc */
/* check that each entry does not go beyond length
of list */
/* check that each element of each entry does not
go beyond end of list */
__u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset);
struct fealist *ea_response_data;
rc = 0;
/* validate_trans2_offsets() */
/* BB check if start of smb + data_offset > &bcc+ bcc */
ea_response_data = (struct fealist *)
(((char *) &pSMBr->hdr.Protocol) +
data_offset);
name_len = le32_to_cpu(ea_response_data->list_len);
cFYI(1, ("ea length %d", name_len));
if (name_len <= 8) {
/* returned EA size zeroed at top of function */
cFYI(1, ("empty EA list returned from server"));
} else {
/* account for ea list len */
name_len -= 4;
temp_fea = ea_response_data->list;
temp_ptr = (char *)temp_fea;
while (name_len > 0) {
__u16 value_len;
name_len -= 4;
temp_ptr += 4;
rc += temp_fea->name_len;
/* account for prefix user. and trailing null */
rc = rc + 5 + 1;
if (rc < (int)buf_size) {
memcpy(EAData, "user.", 5);
EAData += 5;
memcpy(EAData, temp_ptr,
temp_fea->name_len);
EAData += temp_fea->name_len;
/* null terminate name */
*EAData = 0;
EAData = EAData + 1;
} else if (buf_size == 0) {
/* skip copy - calc size only */
} else {
/* stop before overrun buffer */
rc = -ERANGE;
break;
}
name_len -= temp_fea->name_len;
temp_ptr += temp_fea->name_len;
/* account for trailing null */
name_len--;
temp_ptr++;
value_len =
le16_to_cpu(temp_fea->value_len);
name_len -= value_len;
temp_ptr += value_len;
/* BB check that temp_ptr is still
within the SMB BB*/
/* no trailing null to account for
in value len */
/* go on to next EA */
temp_fea = (struct fea *)temp_ptr;
}
}
}
/* BB also check enough total bytes returned */
/* BB we need to improve the validity checking
of these trans2 responses */
rc = validate_t2((struct smb_t2_rsp *)pSMBr);
if (rc || (pSMBr->ByteCount < 4)) {
rc = -EIO; /* bad smb */
goto QAllEAsOut;
}
cifs_buf_release(pSMB);
if (rc == -EAGAIN)
goto QAllEAsRetry;
return (ssize_t)rc;
}
/* check that length of list is not more than bcc */
/* check that each entry does not go beyond length
of list */
/* check that each element of each entry does not
go beyond end of list */
/* validate_trans2_offsets() */
/* BB check if start of smb + data_offset > &bcc+ bcc */
ssize_t CIFSSMBQueryEA(const int xid, struct cifsTconInfo *tcon,
const unsigned char *searchName, const unsigned char *ea_name,
unsigned char *ea_value, size_t buf_size,
const struct nls_table *nls_codepage, int remap)
{
TRANSACTION2_QPI_REQ *pSMB = NULL;
TRANSACTION2_QPI_RSP *pSMBr = NULL;
int rc = 0;
int bytes_returned;
int name_len;
struct fea *temp_fea;
char *temp_ptr;
__u16 params, byte_count;
data_offset = le16_to_cpu(pSMBr->t2.DataOffset);
ea_response_data = (struct fealist *)
(((char *) &pSMBr->hdr.Protocol) + data_offset);
cFYI(1, ("In Query EA path %s", searchName));
QEARetry:
rc = smb_init(SMB_COM_TRANSACTION2, 15, tcon, (void **) &pSMB,
(void **) &pSMBr);
if (rc)
return rc;
list_len = le32_to_cpu(ea_response_data->list_len);
cFYI(1, ("ea length %d", list_len));
if (list_len <= 8) {
cFYI(1, ("empty EA list returned from server"));
goto QAllEAsOut;
}
if (pSMB->hdr.Flags2 & SMBFLG2_UNICODE) {
name_len =
cifsConvertToUCS((__le16 *) pSMB->FileName, searchName,
PATH_MAX, nls_codepage, remap);
name_len++; /* trailing null */
name_len *= 2;
} else { /* BB improve the check for buffer overruns BB */
name_len = strnlen(searchName, PATH_MAX);
name_len++; /* trailing null */
strncpy(pSMB->FileName, searchName, name_len);
/* make sure list_len doesn't go past end of SMB */
end_of_smb = (char *)pByteArea(&pSMBr->hdr) + BCC(&pSMBr->hdr);
if ((char *)ea_response_data + list_len > end_of_smb) {
cFYI(1, ("EA list appears to go beyond SMB"));
rc = -EIO;
goto QAllEAsOut;
}
params = 2 /* level */ + 4 /* reserved */ + name_len /* includes NUL */;
pSMB->TotalDataCount = 0;
pSMB->MaxParameterCount = cpu_to_le16(2);
/* BB find exact max SMB PDU from sess structure BB */
pSMB->MaxDataCount = cpu_to_le16(4000);
pSMB->MaxSetupCount = 0;
pSMB->Reserved = 0;
pSMB->Flags = 0;
pSMB->Timeout = 0;
pSMB->Reserved2 = 0;
pSMB->ParameterOffset = cpu_to_le16(offsetof(
struct smb_com_transaction2_qpi_req, InformationLevel) - 4);
pSMB->DataCount = 0;
pSMB->DataOffset = 0;
pSMB->SetupCount = 1;
pSMB->Reserved3 = 0;
pSMB->SubCommand = cpu_to_le16(TRANS2_QUERY_PATH_INFORMATION);
byte_count = params + 1 /* pad */ ;
pSMB->TotalParameterCount = cpu_to_le16(params);
pSMB->ParameterCount = pSMB->TotalParameterCount;
pSMB->InformationLevel = cpu_to_le16(SMB_INFO_QUERY_ALL_EAS);
pSMB->Reserved4 = 0;
pSMB->hdr.smb_buf_length += byte_count;
pSMB->ByteCount = cpu_to_le16(byte_count);
/* account for ea list len */
list_len -= 4;
temp_fea = ea_response_data->list;
temp_ptr = (char *)temp_fea;
while (list_len > 0) {
unsigned int name_len;
__u16 value_len;
list_len -= 4;
temp_ptr += 4;
/* make sure we can read name_len and value_len */
if (list_len < 0) {
cFYI(1, ("EA entry goes beyond length of list"));
rc = -EIO;
goto QAllEAsOut;
}
rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
(struct smb_hdr *) pSMBr, &bytes_returned, 0);
if (rc) {
cFYI(1, ("Send error in Query EA = %d", rc));
} else { /* decode response */
rc = validate_t2((struct smb_t2_rsp *)pSMBr);
name_len = temp_fea->name_len;
value_len = le16_to_cpu(temp_fea->value_len);
list_len -= name_len + 1 + value_len;
if (list_len < 0) {
cFYI(1, ("EA entry goes beyond length of list"));
rc = -EIO;
goto QAllEAsOut;
}
/* BB also check enough total bytes returned */
/* BB we need to improve the validity checking
of these trans2 responses */
if (rc || (pSMBr->ByteCount < 4))
rc = -EIO; /* bad smb */
/* else if (pFindData){
memcpy((char *) pFindData,
(char *) &pSMBr->hdr.Protocol +
data_offset, kl);
}*/ else {
/* check that length of list is not more than bcc */
/* check that each entry does not go beyond length
of list */
/* check that each element of each entry does not
go beyond end of list */
__u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset);
struct fealist *ea_response_data;
rc = -ENODATA;
/* validate_trans2_offsets() */
/* BB check if start of smb + data_offset > &bcc+ bcc*/
ea_response_data = (struct fealist *)
(((char *) &pSMBr->hdr.Protocol) +
data_offset);
name_len = le32_to_cpu(ea_response_data->list_len);
cFYI(1, ("ea length %d", name_len));
if (name_len <= 8) {
/* returned EA size zeroed at top of function */
cFYI(1, ("empty EA list returned from server"));
} else {
/* account for ea list len */
name_len -= 4;
temp_fea = ea_response_data->list;
temp_ptr = (char *)temp_fea;
/* loop through checking if we have a matching
name and then return the associated value */
while (name_len > 0) {
__u16 value_len;
name_len -= 4;
temp_ptr += 4;
value_len =
le16_to_cpu(temp_fea->value_len);
/* BB validate that value_len falls within SMB,
even though maximum for name_len is 255 */
if (memcmp(temp_fea->name, ea_name,
temp_fea->name_len) == 0) {
/* found a match */
rc = value_len;
/* account for prefix user. and trailing null */
if (rc <= (int)buf_size) {
memcpy(ea_value,
temp_fea->name+temp_fea->name_len+1,
rc);
/* ea values, unlike ea
names, are not null
terminated */
} else if (buf_size == 0) {
/* skip copy - calc size only */
} else {
/* stop before overrun buffer */
rc = -ERANGE;
}
break;
}
name_len -= temp_fea->name_len;
temp_ptr += temp_fea->name_len;
/* account for trailing null */
name_len--;
temp_ptr++;
name_len -= value_len;
temp_ptr += value_len;
/* No trailing null to account for in
value_len. Go on to next EA */
temp_fea = (struct fea *)temp_ptr;
if (ea_name) {
if (strncmp(ea_name, temp_ptr, name_len) == 0) {
temp_ptr += name_len + 1;
rc = value_len;
if (buf_size == 0)
goto QAllEAsOut;
if ((size_t)value_len > buf_size) {
rc = -ERANGE;
goto QAllEAsOut;
}
memcpy(EAData, temp_ptr, value_len);
goto QAllEAsOut;
}
} else {
/* account for prefix user. and trailing null */
rc += (5 + 1 + name_len);
if (rc < (int) buf_size) {
memcpy(EAData, "user.", 5);
EAData += 5;
memcpy(EAData, temp_ptr, name_len);
EAData += name_len;
/* null terminate name */
*EAData = 0;
++EAData;
} else if (buf_size == 0) {
/* skip copy - calc size only */
} else {
/* stop before overrun buffer */
rc = -ERANGE;
break;
}
}
temp_ptr += name_len + 1 + value_len;
temp_fea = (struct fea *)temp_ptr;
}
/* didn't find the named attribute */
if (ea_name)
rc = -ENODATA;
QAllEAsOut:
cifs_buf_release(pSMB);
if (rc == -EAGAIN)
goto QEARetry;
goto QAllEAsRetry;
return (ssize_t)rc;
}
......
fs/cifs/connect.c
View file @ 4846546f
......@@ -2388,13 +2388,13 @@ cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
*/
cifs_put_tcp_session(srvTcp);
down(&pSesInfo->sesSem);
mutex_lock(&pSesInfo->session_mutex);
if (pSesInfo->need_reconnect) {
cFYI(1, ("Session needs reconnect"));
rc = cifs_setup_session(xid, pSesInfo,
cifs_sb->local_nls);
}
up(&pSesInfo->sesSem);
mutex_unlock(&pSesInfo->session_mutex);
} else if (!rc) {
cFYI(1, ("Existing smb sess not found"));
pSesInfo = sesInfoAlloc();
......@@ -2437,12 +2437,12 @@ cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
}
pSesInfo->linux_uid = volume_info->linux_uid;
pSesInfo->overrideSecFlg = volume_info->secFlg;
down(&pSesInfo->sesSem);
mutex_lock(&pSesInfo->session_mutex);
/* BB FIXME need to pass vol->secFlgs BB */
rc = cifs_setup_session(xid, pSesInfo,
cifs_sb->local_nls);
up(&pSesInfo->sesSem);
mutex_unlock(&pSesInfo->session_mutex);
}
/* search for existing tcon to this server share */
......
fs/cifs/inode.c
View file @ 4846546f
......@@ -111,6 +111,7 @@ cifs_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr)
cifs_i->delete_pending = fattr->cf_flags & CIFS_FATTR_DELETE_PENDING;
cifs_i->server_eof = fattr->cf_eof;
/*
* Can't safely change the file size here if the client is writing to
* it due to potential races.
......@@ -366,7 +367,7 @@ static int cifs_sfu_mode(struct cifs_fattr *fattr, const unsigned char *path,
char ea_value[4];
__u32 mode;
rc = CIFSSMBQueryEA(xid, cifs_sb->tcon, path, "SETFILEBITS",
rc = CIFSSMBQAllEAs(xid, cifs_sb->tcon, path, "SETFILEBITS",
ea_value, 4 /* size of buf */, cifs_sb->local_nls,
cifs_sb->mnt_cifs_flags &
CIFS_MOUNT_MAP_SPECIAL_CHR);
......
fs/cifs/misc.c
View file @ 4846546f
......@@ -79,7 +79,7 @@ sesInfoAlloc(void)
++ret_buf->ses_count;
INIT_LIST_HEAD(&ret_buf->smb_ses_list);
INIT_LIST_HEAD(&ret_buf->tcon_list);
init_MUTEX(&ret_buf->sesSem);
mutex_init(&ret_buf->session_mutex);
}
return ret_buf;
}
......
fs/cifs/xattr.c
View file @ 4846546f
......@@ -244,7 +244,7 @@ ssize_t cifs_getxattr(struct dentry *direntry, const char *ea_name,
/* revalidate/getattr then populate from inode */
} /* BB add else when above is implemented */
ea_name += 5; /* skip past user. prefix */
rc = CIFSSMBQueryEA(xid, pTcon, full_path, ea_name, ea_value,
rc = CIFSSMBQAllEAs(xid, pTcon, full_path, ea_name, ea_value,
buf_size, cifs_sb->local_nls,
cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
} else if (strncmp(ea_name, CIFS_XATTR_OS2_PREFIX, 4) == 0) {
......@@ -252,7 +252,7 @@ ssize_t cifs_getxattr(struct dentry *direntry, const char *ea_name,
goto get_ea_exit;
ea_name += 4; /* skip past os2. prefix */
rc = CIFSSMBQueryEA(xid, pTcon, full_path, ea_name, ea_value,
rc = CIFSSMBQAllEAs(xid, pTcon, full_path, ea_name, ea_value,
buf_size, cifs_sb->local_nls,
cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
} else if (strncmp(ea_name, POSIX_ACL_XATTR_ACCESS,
......@@ -364,8 +364,8 @@ ssize_t cifs_listxattr(struct dentry *direntry, char *data, size_t buf_size)
/* if proc/fs/cifs/streamstoxattr is set then
search server for EAs or streams to
returns as xattrs */
rc = CIFSSMBQAllEAs(xid, pTcon, full_path, data, buf_size,
cifs_sb->local_nls,
rc = CIFSSMBQAllEAs(xid, pTcon, full_path, NULL, data,
buf_size, cifs_sb->local_nls,
cifs_sb->mnt_cifs_flags &
CIFS_MOUNT_MAP_SPECIAL_CHR);
......
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