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[CIFS] Add worker function for Get ACL cifs style

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Signed-off-by: Steve French <sfrench@us.ibm.com>
This commit is contained in:
Steve French 2006-01-12 15:44:21 -08:00
parent 94bc2be31a
commit 0a4b92c05e
9 changed files with 292 additions and 20 deletions
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4
fs/cifs/CHANGES
View file

@ -1,7 +1,9 @@
Version 1.40
------------
Use fsuid (fsgid) more consistently instead of uid (gid). Improve performance
of readpages by eliminating one extra memcpy.
of readpages by eliminating one extra memcpy. Allow update of file size
from remote server even if file is open for write as long as mount is
directio.
Version 1.39
------------

5
fs/cifs/cifs_fs_sb.h
View file

@ -24,9 +24,10 @@
#define CIFS_MOUNT_DIRECT_IO 8 /* do not write nor read through page cache */
#define CIFS_MOUNT_NO_XATTR 0x10 /* if set - disable xattr support */
#define CIFS_MOUNT_MAP_SPECIAL_CHR 0x20 /* remap illegal chars in filenames */
#define CIFS_MOUNT_POSIX_PATHS 0x40 /* Negotiate posix pathnames if possible. */
#define CIFS_MOUNT_UNX_EMUL 0x80 /* Network compat with SFUnix emulation */
#define CIFS_MOUNT_POSIX_PATHS 0x40 /* Negotiate posix pathnames if possible. */
#define CIFS_MOUNT_UNX_EMUL 0x80 /* Network compat with SFUnix emulation */
#define CIFS_MOUNT_NO_BRL 0x100 /* No sending byte range locks to srv */
#define CIFS_MOUNT_CIFS_ACL 0x200 /* send ACL requests to non-POSIX srv */
struct cifs_sb_info {
struct cifsTconInfo *tcon; /* primary mount */

2
fs/cifs/cifsglob.h
View file

@ -233,6 +233,8 @@ struct cifsTconInfo {
atomic_t num_hardlinks;
atomic_t num_symlinks;
atomic_t num_locks;
atomic_t num_acl_get;
atomic_t num_acl_set;
#ifdef CONFIG_CIFS_STATS2
unsigned long long time_writes;
unsigned long long time_reads;

89
fs/cifs/cifspdu.h
View file

@ -528,7 +528,7 @@ typedef union smb_com_session_setup_andx {
/* STRING PrimaryDomain */
/* STRING NativeOS */
/* STRING NativeLanMan */
} __attribute__((packed)) old_req; /* pre-NTLM (LANMAN2.1) request format */
} __attribute__((packed)) old_req; /* pre-NTLM (LANMAN2.1) req format */
struct { /* default (NTLM) response format */
struct smb_hdr hdr; /* wct = 3 */
@ -540,7 +540,7 @@ typedef union smb_com_session_setup_andx {
unsigned char NativeOS[1]; /* followed by */
/* unsigned char * NativeLanMan; */
/* unsigned char * PrimaryDomain; */
} __attribute__((packed)) old_resp; /* pre-NTLM (LANMAN2.1) response format */
} __attribute__((packed)) old_resp; /* pre-NTLM (LANMAN2.1) response */
} __attribute__((packed)) SESSION_SETUP_ANDX;
#define CIFS_NETWORK_OPSYS "CIFS VFS Client for Linux"
@ -1007,10 +1007,49 @@ typedef struct smb_com_setattr_rsp {
/* empty wct response to setattr */
/***************************************************/
/* NT Transact structure defintions follow */
/* Currently only ioctl and notify are implemented */
/***************************************************/
/*******************************************************/
/* NT Transact structure defintions follow */
/* Currently only ioctl, acl (get security descriptor) */
/* and notify are implemented */
/*******************************************************/
typedef struct smb_com_ntransact_req {
struct smb_hdr hdr; /* wct >= 19 */
__u8 MaxSetupCount;
__u16 Reserved;
__le32 TotalParameterCount;
__le32 TotalDataCount;
__le32 MaxParameterCount;
__le32 MaxDataCount;
__le32 ParameterCount;
__le32 ParameterOffset;
__le32 DataCount;
__le32 DataOffset;
__u8 SetupCount; /* four setup words follow subcommand */
/* SNIA spec incorrectly included spurious pad here */
__le16 SubCommand; /* 2 = IOCTL/FSCTL */
/* SetupCount words follow then */
__le16 ByteCount;
__u8 Pad[3];
__u8 Parms[0];
} __attribute__((packed)) NTRANSACT_REQ;
typedef struct smb_com_ntransact_rsp {
struct smb_hdr hdr; /* wct = 18 */
__u8 Reserved[3];
__le32 TotalParameterCount;
__le32 TotalDataCount;
__le32 ParameterCount;
__le32 ParameterOffset;
__le32 ParameterDisplacement;
__le32 DataCount;
__le32 DataOffset;
__le32 DataDisplacement;
__u8 SetupCount; /* 0 */
__u16 ByteCount;
/* __u8 Pad[3]; */
/* parms and data follow */
} __attribute__((packed)) NTRANSACT_RSP;
typedef struct smb_com_transaction_ioctl_req {
struct smb_hdr hdr; /* wct = 23 */
__u8 MaxSetupCount;
@ -1025,11 +1064,11 @@ typedef struct smb_com_transaction_ioctl_req {
__le32 DataOffset;
__u8 SetupCount; /* four setup words follow subcommand */
/* SNIA spec incorrectly included spurious pad here */
__le16 SubCommand;/* 2 = IOCTL/FSCTL */
__le16 SubCommand; /* 2 = IOCTL/FSCTL */
__le32 FunctionCode;
__u16 Fid;
__u8 IsFsctl; /* 1 = File System Control, 0 = device control (IOCTL)*/
__u8 IsRootFlag; /* 1 = apply command to root of share (must be DFS share)*/
__u8 IsFsctl; /* 1 = File System Control 0 = device control (IOCTL) */
__u8 IsRootFlag; /* 1 = apply command to root of share (must be DFS) */
__le16 ByteCount;
__u8 Pad[3];
__u8 Data[1];
@ -1049,9 +1088,35 @@ typedef struct smb_com_transaction_ioctl_rsp {
__u8 SetupCount; /* 1 */
__le16 ReturnedDataLen;
__u16 ByteCount;
__u8 Pad[3];
} __attribute__((packed)) TRANSACT_IOCTL_RSP;
#define CIFS_ACL_OWNER 1
#define CIFS_ACL_GROUP 2
#define CIFS_ACL_DACL 4
#define CIFS_ACL_SACL 8
typedef struct smb_com_transaction_qsec_req {
struct smb_hdr hdr; /* wct = 19 */
__u8 MaxSetupCount;
__u16 Reserved;
__le32 TotalParameterCount;
__le32 TotalDataCount;
__le32 MaxParameterCount;
__le32 MaxDataCount;
__le32 ParameterCount;
__le32 ParameterOffset;
__le32 DataCount;
__le32 DataOffset;
__u8 SetupCount; /* no setup words follow subcommand */
/* SNIA spec incorrectly included spurious pad here */
__le16 SubCommand; /* 6 = QUERY_SECURITY_DESC */
__le16 ByteCount; /* bcc = 3 + 8 */
__u8 Pad[3];
__u16 Fid;
__u16 Reserved2;
__le32 AclFlags;
} __attribute__((packed)) QUERY_SEC_DESC_REQ;
typedef struct smb_com_transaction_change_notify_req {
struct smb_hdr hdr; /* wct = 23 */
__u8 MaxSetupCount;
@ -1072,10 +1137,12 @@ typedef struct smb_com_transaction_change_notify_req {
__u8 WatchTree; /* 1 = Monitor subdirectories */
__u8 Reserved2;
__le16 ByteCount;
/* __u8 Pad[3];*/
/* __u8 Pad[3];*/
/* __u8 Data[1];*/
} __attribute__((packed)) TRANSACT_CHANGE_NOTIFY_REQ;
/* BB eventually change to use generic ntransact rsp struct
and validation routine */
typedef struct smb_com_transaction_change_notify_rsp {
struct smb_hdr hdr; /* wct = 18 */
__u8 Reserved[3];

3
fs/cifs/cifsproto.h
View file

@ -299,6 +299,9 @@ 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,
const struct nls_table *nls_codepage, int remap_special_chars);
extern int CIFSSMBGetCIFSACL(const int xid, struct cifsTconInfo *tcon,
__u16 fid, char *acl_inf, const int buflen,
const int acl_type /* ACCESS vs. DEFAULT */);
extern int CIFSSMBGetPosixACL(const int xid, struct cifsTconInfo *tcon,
const unsigned char *searchName,
char *acl_inf, const int buflen,const int acl_type,

179
fs/cifs/cifssmb.c
View file

@ -1926,6 +1926,90 @@ querySymLinkRetry:
return rc;
}
/* Initialize NT TRANSACT SMB into small smb request buffer.
This assumes that all NT TRANSACTS that we init here have
total parm and data under about 400 bytes (to fit in small cifs
buffer size), which is the case so far, it easily fits. NB:
Setup words themselves and ByteCount
MaxSetupCount (size of returned setup area) and
MaxParameterCount (returned parms size) must be set by caller */
static int
smb_init_ntransact(const __u16 sub_command, const int setup_count,
const int parm_len, struct cifsTconInfo *tcon,
void ** ret_buf)
{
int rc;
__u32 temp_offset;
struct smb_com_ntransact_req * pSMB;
rc = small_smb_init(SMB_COM_NT_TRANSACT, 19 + setup_count, tcon,
(void **)&pSMB);
if (rc)
return rc;
*ret_buf = (void *)pSMB;
pSMB->Reserved = 0;
pSMB->TotalParameterCount = cpu_to_le32(parm_len);
pSMB->TotalDataCount = 0;
pSMB->MaxDataCount = cpu_to_le32((tcon->ses->server->maxBuf -
MAX_CIFS_HDR_SIZE) & 0xFFFFFF00);
pSMB->ParameterCount = pSMB->TotalParameterCount;
pSMB->DataCount = pSMB->TotalDataCount;
temp_offset = offsetof(struct smb_com_ntransact_req, Parms) +
(setup_count * 2) - 4 /* for rfc1001 length itself */;
pSMB->ParameterOffset = cpu_to_le32(temp_offset);
pSMB->DataOffset = cpu_to_le32(temp_offset + parm_len);
pSMB->SetupCount = setup_count; /* no need to le convert byte fields */
pSMB->SubCommand = cpu_to_le16(sub_command);
return 0;
}
static int
validate_ntransact(char * buf, char ** ppparm, char ** ppdata,
int * pdatalen, int * pparmlen)
{
char * end_of_smb;
__u32 data_count, data_offset, parm_count, parm_offset;
struct smb_com_ntransact_rsp * pSMBr;
if(buf == NULL)
return -EINVAL;
pSMBr = (struct smb_com_ntransact_rsp *)buf;
/* ByteCount was converted from little endian in SendReceive */
end_of_smb = 2 /* sizeof byte count */ + pSMBr->ByteCount +
(char *)&pSMBr->ByteCount;
data_offset = le32_to_cpu(pSMBr->DataOffset);
data_count = le32_to_cpu(pSMBr->DataCount);
parm_offset = le32_to_cpu(pSMBr->ParameterOffset);
parm_count = le32_to_cpu(pSMBr->ParameterCount);
*ppparm = (char *)&pSMBr->hdr.Protocol + parm_offset;
*ppdata = (char *)&pSMBr->hdr.Protocol + data_offset;
/* should we also check that parm and data areas do not overlap? */
if(*ppparm > end_of_smb) {
cFYI(1,("parms start after end of smb"));
return -EINVAL;
} else if(parm_count + *ppparm > end_of_smb) {
cFYI(1,("parm end after end of smb"));
return -EINVAL;
} else if(*ppdata > end_of_smb) {
cFYI(1,("data starts after end of smb"));
return -EINVAL;
} else if(data_count + *ppdata > end_of_smb) {
cFYI(1,("data %p + count %d (%p) ends after end of smb %p start %p",
*ppdata, data_count, (data_count + *ppdata), end_of_smb, pSMBr)); /* BB FIXME */
return -EINVAL;
} else if(parm_count + data_count > pSMBr->ByteCount) {
cFYI(1,("parm count and data count larger than SMB"));
return -EINVAL;
}
return 0;
}
int
CIFSSMBQueryReparseLinkInfo(const int xid, struct cifsTconInfo *tcon,
const unsigned char *searchName,
@ -1948,7 +2032,8 @@ CIFSSMBQueryReparseLinkInfo(const int xid, struct cifsTconInfo *tcon,
pSMB->TotalDataCount = 0;
pSMB->MaxParameterCount = cpu_to_le32(2);
/* BB find exact data count max from sess structure BB */
pSMB->MaxDataCount = cpu_to_le32(4000);
pSMB->MaxDataCount = cpu_to_le32((tcon->ses->server->maxBuf -
MAX_CIFS_HDR_SIZE) & 0xFFFFFF00);
pSMB->MaxSetupCount = 4;
pSMB->Reserved = 0;
pSMB->ParameterOffset = 0;
@ -1975,7 +2060,9 @@ CIFSSMBQueryReparseLinkInfo(const int xid, struct cifsTconInfo *tcon,
rc = -EIO; /* bad smb */
else {
if(data_count && (data_count < 2048)) {
char * end_of_smb = pSMBr->ByteCount + (char *)&pSMBr->ByteCount;
char * end_of_smb = 2 /* sizeof byte count */ +
pSMBr->ByteCount +
(char *)&pSMBr->ByteCount;
struct reparse_data * reparse_buf = (struct reparse_data *)
((char *)&pSMBr->hdr.Protocol + data_offset);
@ -2219,6 +2306,7 @@ queryAclRetry:
rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
(struct smb_hdr *) pSMBr, &bytes_returned, 0);
cifs_stats_inc(&tcon->num_acl_get);
if (rc) {
cFYI(1, ("Send error in Query POSIX ACL = %d", rc));
} else {
@ -2406,6 +2494,87 @@ GetExtAttrOut:
#endif /* CONFIG_POSIX */
/* Convert CIFS ACL to POSIX form */
static int parse_sec_desc(struct sec_desc * psec_desc, int acl_len)
{
CHECK ON OTHER COMPUTER TO SEE IF FORMAT ENCODED IN CIFSPDU.H ALREADY
return 0;
}
/* Get Security Descriptor (by handle) from remote server for a file or dir */
int
CIFSSMBGetCIFSACL(const int xid, struct cifsTconInfo *tcon, __u16 fid,
/* BB fix up return info */ char *acl_inf, const int buflen,
const int acl_type /* ACCESS/DEFAULT not sure implication */)
{
int rc = 0;
int buf_type = 0;
QUERY_SEC_DESC_REQ * pSMB;
struct kvec iov[1];
cFYI(1, ("GetCifsACL"));
rc = smb_init_ntransact(NT_TRANSACT_QUERY_SECURITY_DESC, 0,
8 /* parm len */, tcon, (void **) &pSMB);
if (rc)
return rc;
pSMB->MaxParameterCount = cpu_to_le32(4);
/* BB TEST with big acls that might need to be e.g. larger than 16K */
pSMB->MaxSetupCount = 0;
pSMB->Fid = fid; /* file handle always le */
pSMB->AclFlags = cpu_to_le32(CIFS_ACL_OWNER | CIFS_ACL_GROUP |
CIFS_ACL_DACL);
pSMB->ByteCount = cpu_to_le16(11); /* 3 bytes pad + 8 bytes parm */
pSMB->hdr.smb_buf_length += 11;
iov[0].iov_base = (char *)pSMB;
iov[0].iov_len = pSMB->hdr.smb_buf_length + 4;
rc = SendReceive2(xid, tcon->ses, iov, 1 /* num iovec */, &buf_type, 0);
cifs_stats_inc(&tcon->num_acl_get);
if (rc) {
cFYI(1, ("Send error in QuerySecDesc = %d", rc));
} else { /* decode response */
struct sec_desc * psec_desc;
__le32 * parm;
int parm_len;
int data_len;
int acl_len;
struct smb_com_ntransact_rsp * pSMBr;
/* validate_nttransact */
rc = validate_ntransact(iov[0].iov_base, (char **)&parm,
(char **)&psec_desc,
&parm_len, &data_len);
if(rc)
goto qsec_out;
pSMBr = (struct smb_com_ntransact_rsp *)iov[0].iov_base;
cERROR(1,("smb %p parm %p data %p",pSMBr,parm,psec_desc)); /* BB removeme BB */
if (le32_to_cpu(pSMBr->ParameterCount) != 4) {
rc = -EIO; /* bad smb */
goto qsec_out;
}
/* BB check that data area is minimum length and as big as acl_len */
acl_len = le32_to_cpu(*(__le32 *)parm);
/* BB check if(acl_len > bufsize) */
parse_sec_desc(psec_desc, acl_len);
}
qsec_out:
if(buf_type == CIFS_SMALL_BUFFER)
cifs_small_buf_release(iov[0].iov_base);
else if(buf_type == CIFS_LARGE_BUFFER)
cifs_buf_release(iov[0].iov_base);
cifs_small_buf_release(pSMB);
return rc;
}
/* Legacy Query Path Information call for lookup to old servers such
as Win9x/WinME */
int SMBQueryInformation(const int xid, struct cifsTconInfo *tcon,
@ -4304,7 +4473,7 @@ int CIFSSMBNotify(const int xid, struct cifsTconInfo *tcon,
{
int rc = 0;
struct smb_com_transaction_change_notify_req * pSMB = NULL;
struct smb_com_transaction_change_notify_rsp * pSMBr = NULL;
struct smb_com_ntransaction_change_notify_rsp * pSMBr = NULL;
struct dir_notify_req *dnotify_req;
int bytes_returned;
@ -4319,6 +4488,10 @@ int CIFSSMBNotify(const int xid, struct cifsTconInfo *tcon,
pSMB->MaxParameterCount = cpu_to_le32(2);
/* BB find exact data count max from sess structure BB */
pSMB->MaxDataCount = 0; /* same in little endian or be */
/* BB VERIFY verify which is correct for above BB */
pSMB->MaxDataCount = cpu_to_le32((tcon->ses->server->maxBuf -
MAX_CIFS_HDR_SIZE) & 0xFFFFFF00);
pSMB->MaxSetupCount = 4;
pSMB->Reserved = 0;
pSMB->ParameterOffset = 0;

7
fs/cifs/connect.c
View file

@ -76,6 +76,7 @@ struct smb_vol {
unsigned setuids:1;
unsigned noperm:1;
unsigned no_psx_acl:1; /* set if posix acl support should be disabled */
unsigned cifs_acl:1;
unsigned no_xattr:1; /* set if xattr (EA) support should be disabled*/
unsigned server_ino:1; /* use inode numbers from server ie UniqueId */
unsigned direct_io:1;
@ -1159,6 +1160,10 @@ cifs_parse_mount_options(char *options, const char *devname,struct smb_vol *vol)
vol->server_ino = 1;
} else if (strnicmp(data, "noserverino",9) == 0) {
vol->server_ino = 0;
} else if (strnicmp(data, "cifsacl",7) == 0) {
vol->cifs_acl = 1;
} else if (strnicmp(data, "nocifsacl", 9) == 0) {
vol->cifs_acl = 0;
} else if (strnicmp(data, "acl",3) == 0) {
vol->no_psx_acl = 0;
} else if (strnicmp(data, "noacl",5) == 0) {
@ -1806,6 +1811,8 @@ cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL;
if(volume_info.nobrl)
cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL;
if(volume_info.cifs_acl)
cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL;
if(volume_info.direct_io) {
cFYI(1,("mounting share using direct i/o"));

1
fs/cifs/transport.c
View file

@ -489,7 +489,6 @@ SendReceive2(const unsigned int xid, struct cifsSesInfo *ses,
receive_len, xid));
rc = -EIO;
} else { /* rcvd frame is ok */
if (midQ->resp_buf &&
(midQ->midState == MID_RESPONSE_RECEIVED)) {

22
fs/cifs/xattr.c
View file

@ -254,7 +254,8 @@ ssize_t cifs_getxattr(struct dentry * direntry, const char * ea_name,
rc = CIFSSMBQueryEA(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,strlen(POSIX_ACL_XATTR_ACCESS)) == 0) {
} else if(strncmp(ea_name,POSIX_ACL_XATTR_ACCESS,
strlen(POSIX_ACL_XATTR_ACCESS)) == 0) {
#ifdef CONFIG_CIFS_POSIX
if(sb->s_flags & MS_POSIXACL)
rc = CIFSSMBGetPosixACL(xid, pTcon, full_path,
@ -262,10 +263,27 @@ ssize_t cifs_getxattr(struct dentry * direntry, const char * ea_name,
cifs_sb->local_nls,
cifs_sb->mnt_cifs_flags &
CIFS_MOUNT_MAP_SPECIAL_CHR);
/* else if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) {
__u16 fid;
int oplock = FALSE;
rc = CIFSSMBOpen(xid, pTcon, full_path,
FILE_OPEN, GENERIC_READ, 0, &fid,
&oplock, NULL, cifs_sb->local_nls,
cifs_sb->mnt_cifs_flags &
CIFS_MOUNT_MAP_SPECIAL_CHR);
if(rc == 0) {
rc = CIFSSMBGetCIFSACL(xid, pTcon, fid,
ea_value, buf_size,
ACL_TYPE_ACCESS);
CIFSSMBClose(xid, pTcon, fid)
}
} */ /* BB enable after fixing up return data */
#else
cFYI(1,("query POSIX ACL not supported yet"));
#endif /* CONFIG_CIFS_POSIX */
} else if(strncmp(ea_name,POSIX_ACL_XATTR_DEFAULT,strlen(POSIX_ACL_XATTR_DEFAULT)) == 0) {
} else if(strncmp(ea_name,POSIX_ACL_XATTR_DEFAULT,
strlen(POSIX_ACL_XATTR_DEFAULT)) == 0) {
#ifdef CONFIG_CIFS_POSIX
if(sb->s_flags & MS_POSIXACL)
rc = CIFSSMBGetPosixACL(xid, pTcon, full_path,