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[CIFS] Add worker function for Get ACL cifs style
Signed-off-by: Steve French <sfrench@us.ibm.com>
This commit is contained in:
Steve French
parent
94bc2be31a
commit
0a4b92c05e
@ -1,7 +1,9 @@
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Version 1.40
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------------
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Use fsuid (fsgid) more consistently instead of uid (gid). Improve performance
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of readpages by eliminating one extra memcpy.
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of readpages by eliminating one extra memcpy. Allow update of file size
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from remote server even if file is open for write as long as mount is
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directio.
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Version 1.39
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------------
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@ -24,9 +24,10 @@
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#define CIFS_MOUNT_DIRECT_IO 8 /* do not write nor read through page cache */
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#define CIFS_MOUNT_NO_XATTR 0x10 /* if set - disable xattr support */
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#define CIFS_MOUNT_MAP_SPECIAL_CHR 0x20 /* remap illegal chars in filenames */
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#define CIFS_MOUNT_POSIX_PATHS 0x40 /* Negotiate posix pathnames if possible. */
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#define CIFS_MOUNT_UNX_EMUL 0x80 /* Network compat with SFUnix emulation */
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#define CIFS_MOUNT_POSIX_PATHS 0x40 /* Negotiate posix pathnames if possible. */
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#define CIFS_MOUNT_UNX_EMUL 0x80 /* Network compat with SFUnix emulation */
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#define CIFS_MOUNT_NO_BRL 0x100 /* No sending byte range locks to srv */
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#define CIFS_MOUNT_CIFS_ACL 0x200 /* send ACL requests to non-POSIX srv */
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struct cifs_sb_info {
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struct cifsTconInfo *tcon; /* primary mount */
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@ -233,6 +233,8 @@ struct cifsTconInfo {
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atomic_t num_hardlinks;
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atomic_t num_symlinks;
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atomic_t num_locks;
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atomic_t num_acl_get;
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atomic_t num_acl_set;
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#ifdef CONFIG_CIFS_STATS2
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unsigned long long time_writes;
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unsigned long long time_reads;
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@ -528,7 +528,7 @@ typedef union smb_com_session_setup_andx {
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/* STRING PrimaryDomain */
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/* STRING NativeOS */
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/* STRING NativeLanMan */
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} __attribute__((packed)) old_req; /* pre-NTLM (LANMAN2.1) request format */
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} __attribute__((packed)) old_req; /* pre-NTLM (LANMAN2.1) req format */
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struct { /* default (NTLM) response format */
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struct smb_hdr hdr; /* wct = 3 */
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@ -540,7 +540,7 @@ typedef union smb_com_session_setup_andx {
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unsigned char NativeOS[1]; /* followed by */
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/* unsigned char * NativeLanMan; */
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/* unsigned char * PrimaryDomain; */
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} __attribute__((packed)) old_resp; /* pre-NTLM (LANMAN2.1) response format */
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} __attribute__((packed)) old_resp; /* pre-NTLM (LANMAN2.1) response */
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} __attribute__((packed)) SESSION_SETUP_ANDX;
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#define CIFS_NETWORK_OPSYS "CIFS VFS Client for Linux"
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@ -1007,10 +1007,49 @@ typedef struct smb_com_setattr_rsp {
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/* empty wct response to setattr */
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/***************************************************/
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/* NT Transact structure defintions follow */
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/* Currently only ioctl and notify are implemented */
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/***************************************************/
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/*******************************************************/
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/* NT Transact structure defintions follow */
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/* Currently only ioctl, acl (get security descriptor) */
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/* and notify are implemented */
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/*******************************************************/
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typedef struct smb_com_ntransact_req {
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struct smb_hdr hdr; /* wct >= 19 */
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__u8 MaxSetupCount;
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__u16 Reserved;
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__le32 TotalParameterCount;
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__le32 TotalDataCount;
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__le32 MaxParameterCount;
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__le32 MaxDataCount;
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__le32 ParameterCount;
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__le32 ParameterOffset;
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__le32 DataCount;
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__le32 DataOffset;
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__u8 SetupCount; /* four setup words follow subcommand */
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/* SNIA spec incorrectly included spurious pad here */
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__le16 SubCommand; /* 2 = IOCTL/FSCTL */
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/* SetupCount words follow then */
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__le16 ByteCount;
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__u8 Pad[3];
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__u8 Parms[0];
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} __attribute__((packed)) NTRANSACT_REQ;
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typedef struct smb_com_ntransact_rsp {
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struct smb_hdr hdr; /* wct = 18 */
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__u8 Reserved[3];
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__le32 TotalParameterCount;
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__le32 TotalDataCount;
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__le32 ParameterCount;
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__le32 ParameterOffset;
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__le32 ParameterDisplacement;
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__le32 DataCount;
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__le32 DataOffset;
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__le32 DataDisplacement;
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__u8 SetupCount; /* 0 */
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__u16 ByteCount;
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/* __u8 Pad[3]; */
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/* parms and data follow */
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} __attribute__((packed)) NTRANSACT_RSP;
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typedef struct smb_com_transaction_ioctl_req {
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struct smb_hdr hdr; /* wct = 23 */
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__u8 MaxSetupCount;
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@ -1025,11 +1064,11 @@ typedef struct smb_com_transaction_ioctl_req {
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__le32 DataOffset;
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__u8 SetupCount; /* four setup words follow subcommand */
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/* SNIA spec incorrectly included spurious pad here */
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__le16 SubCommand;/* 2 = IOCTL/FSCTL */
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__le16 SubCommand; /* 2 = IOCTL/FSCTL */
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__le32 FunctionCode;
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__u16 Fid;
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__u8 IsFsctl; /* 1 = File System Control, 0 = device control (IOCTL)*/
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__u8 IsRootFlag; /* 1 = apply command to root of share (must be DFS share)*/
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__u8 IsFsctl; /* 1 = File System Control 0 = device control (IOCTL) */
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__u8 IsRootFlag; /* 1 = apply command to root of share (must be DFS) */
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__le16 ByteCount;
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__u8 Pad[3];
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__u8 Data[1];
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@ -1049,9 +1088,35 @@ typedef struct smb_com_transaction_ioctl_rsp {
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__u8 SetupCount; /* 1 */
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__le16 ReturnedDataLen;
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__u16 ByteCount;
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__u8 Pad[3];
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} __attribute__((packed)) TRANSACT_IOCTL_RSP;
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#define CIFS_ACL_OWNER 1
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#define CIFS_ACL_GROUP 2
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#define CIFS_ACL_DACL 4
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#define CIFS_ACL_SACL 8
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typedef struct smb_com_transaction_qsec_req {
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struct smb_hdr hdr; /* wct = 19 */
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__u8 MaxSetupCount;
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__u16 Reserved;
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__le32 TotalParameterCount;
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__le32 TotalDataCount;
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__le32 MaxParameterCount;
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__le32 MaxDataCount;
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__le32 ParameterCount;
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__le32 ParameterOffset;
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__le32 DataCount;
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__le32 DataOffset;
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__u8 SetupCount; /* no setup words follow subcommand */
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/* SNIA spec incorrectly included spurious pad here */
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__le16 SubCommand; /* 6 = QUERY_SECURITY_DESC */
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__le16 ByteCount; /* bcc = 3 + 8 */
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__u8 Pad[3];
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__u16 Fid;
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__u16 Reserved2;
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__le32 AclFlags;
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} __attribute__((packed)) QUERY_SEC_DESC_REQ;
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typedef struct smb_com_transaction_change_notify_req {
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struct smb_hdr hdr; /* wct = 23 */
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__u8 MaxSetupCount;
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@ -1072,10 +1137,12 @@ typedef struct smb_com_transaction_change_notify_req {
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__u8 WatchTree; /* 1 = Monitor subdirectories */
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__u8 Reserved2;
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__le16 ByteCount;
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/* __u8 Pad[3];*/
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/* __u8 Pad[3];*/
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/* __u8 Data[1];*/
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} __attribute__((packed)) TRANSACT_CHANGE_NOTIFY_REQ;
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/* BB eventually change to use generic ntransact rsp struct
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and validation routine */
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typedef struct smb_com_transaction_change_notify_rsp {
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struct smb_hdr hdr; /* wct = 18 */
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__u8 Reserved[3];
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@ -299,6 +299,9 @@ extern int CIFSSMBSetEA(const int xid, struct cifsTconInfo *tcon,
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const char *fileName, const char * ea_name,
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const void * ea_value, const __u16 ea_value_len,
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const struct nls_table *nls_codepage, int remap_special_chars);
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extern int CIFSSMBGetCIFSACL(const int xid, struct cifsTconInfo *tcon,
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__u16 fid, char *acl_inf, const int buflen,
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const int acl_type /* ACCESS vs. DEFAULT */);
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extern int CIFSSMBGetPosixACL(const int xid, struct cifsTconInfo *tcon,
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const unsigned char *searchName,
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char *acl_inf, const int buflen,const int acl_type,
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@ -1926,6 +1926,90 @@ querySymLinkRetry:
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return rc;
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}
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/* Initialize NT TRANSACT SMB into small smb request buffer.
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This assumes that all NT TRANSACTS that we init here have
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total parm and data under about 400 bytes (to fit in small cifs
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buffer size), which is the case so far, it easily fits. NB:
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Setup words themselves and ByteCount
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MaxSetupCount (size of returned setup area) and
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MaxParameterCount (returned parms size) must be set by caller */
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static int
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smb_init_ntransact(const __u16 sub_command, const int setup_count,
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const int parm_len, struct cifsTconInfo *tcon,
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void ** ret_buf)
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{
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int rc;
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__u32 temp_offset;
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struct smb_com_ntransact_req * pSMB;
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rc = small_smb_init(SMB_COM_NT_TRANSACT, 19 + setup_count, tcon,
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(void **)&pSMB);
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if (rc)
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return rc;
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*ret_buf = (void *)pSMB;
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pSMB->Reserved = 0;
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pSMB->TotalParameterCount = cpu_to_le32(parm_len);
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pSMB->TotalDataCount = 0;
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pSMB->MaxDataCount = cpu_to_le32((tcon->ses->server->maxBuf -
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MAX_CIFS_HDR_SIZE) & 0xFFFFFF00);
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pSMB->ParameterCount = pSMB->TotalParameterCount;
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pSMB->DataCount = pSMB->TotalDataCount;
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temp_offset = offsetof(struct smb_com_ntransact_req, Parms) +
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(setup_count * 2) - 4 /* for rfc1001 length itself */;
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pSMB->ParameterOffset = cpu_to_le32(temp_offset);
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pSMB->DataOffset = cpu_to_le32(temp_offset + parm_len);
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pSMB->SetupCount = setup_count; /* no need to le convert byte fields */
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pSMB->SubCommand = cpu_to_le16(sub_command);
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return 0;
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}
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static int
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validate_ntransact(char * buf, char ** ppparm, char ** ppdata,
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int * pdatalen, int * pparmlen)
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{
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char * end_of_smb;
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__u32 data_count, data_offset, parm_count, parm_offset;
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struct smb_com_ntransact_rsp * pSMBr;
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if(buf == NULL)
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return -EINVAL;
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pSMBr = (struct smb_com_ntransact_rsp *)buf;
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/* ByteCount was converted from little endian in SendReceive */
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end_of_smb = 2 /* sizeof byte count */ + pSMBr->ByteCount +
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(char *)&pSMBr->ByteCount;
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data_offset = le32_to_cpu(pSMBr->DataOffset);
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data_count = le32_to_cpu(pSMBr->DataCount);
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parm_offset = le32_to_cpu(pSMBr->ParameterOffset);
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parm_count = le32_to_cpu(pSMBr->ParameterCount);
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*ppparm = (char *)&pSMBr->hdr.Protocol + parm_offset;
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*ppdata = (char *)&pSMBr->hdr.Protocol + data_offset;
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/* should we also check that parm and data areas do not overlap? */
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if(*ppparm > end_of_smb) {
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cFYI(1,("parms start after end of smb"));
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return -EINVAL;
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} else if(parm_count + *ppparm > end_of_smb) {
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cFYI(1,("parm end after end of smb"));
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return -EINVAL;
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} else if(*ppdata > end_of_smb) {
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cFYI(1,("data starts after end of smb"));
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return -EINVAL;
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} else if(data_count + *ppdata > end_of_smb) {
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cFYI(1,("data %p + count %d (%p) ends after end of smb %p start %p",
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*ppdata, data_count, (data_count + *ppdata), end_of_smb, pSMBr)); /* BB FIXME */
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return -EINVAL;
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} else if(parm_count + data_count > pSMBr->ByteCount) {
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cFYI(1,("parm count and data count larger than SMB"));
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return -EINVAL;
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}
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return 0;
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}
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int
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CIFSSMBQueryReparseLinkInfo(const int xid, struct cifsTconInfo *tcon,
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const unsigned char *searchName,
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@ -1948,7 +2032,8 @@ CIFSSMBQueryReparseLinkInfo(const int xid, struct cifsTconInfo *tcon,
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pSMB->TotalDataCount = 0;
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pSMB->MaxParameterCount = cpu_to_le32(2);
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/* BB find exact data count max from sess structure BB */
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pSMB->MaxDataCount = cpu_to_le32(4000);
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pSMB->MaxDataCount = cpu_to_le32((tcon->ses->server->maxBuf -
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MAX_CIFS_HDR_SIZE) & 0xFFFFFF00);
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pSMB->MaxSetupCount = 4;
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pSMB->Reserved = 0;
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pSMB->ParameterOffset = 0;
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@ -1975,7 +2060,9 @@ CIFSSMBQueryReparseLinkInfo(const int xid, struct cifsTconInfo *tcon,
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rc = -EIO; /* bad smb */
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else {
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if(data_count && (data_count < 2048)) {
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char * end_of_smb = pSMBr->ByteCount + (char *)&pSMBr->ByteCount;
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char * end_of_smb = 2 /* sizeof byte count */ +
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pSMBr->ByteCount +
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(char *)&pSMBr->ByteCount;
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struct reparse_data * reparse_buf = (struct reparse_data *)
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((char *)&pSMBr->hdr.Protocol + data_offset);
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@ -2219,6 +2306,7 @@ queryAclRetry:
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rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
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(struct smb_hdr *) pSMBr, &bytes_returned, 0);
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cifs_stats_inc(&tcon->num_acl_get);
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if (rc) {
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cFYI(1, ("Send error in Query POSIX ACL = %d", rc));
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} else {
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@ -2406,6 +2494,87 @@ GetExtAttrOut:
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#endif /* CONFIG_POSIX */
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/* Convert CIFS ACL to POSIX form */
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static int parse_sec_desc(struct sec_desc * psec_desc, int acl_len)
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{
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CHECK ON OTHER COMPUTER TO SEE IF FORMAT ENCODED IN CIFSPDU.H ALREADY
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return 0;
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}
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/* Get Security Descriptor (by handle) from remote server for a file or dir */
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int
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CIFSSMBGetCIFSACL(const int xid, struct cifsTconInfo *tcon, __u16 fid,
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/* BB fix up return info */ char *acl_inf, const int buflen,
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const int acl_type /* ACCESS/DEFAULT not sure implication */)
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{
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int rc = 0;
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int buf_type = 0;
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QUERY_SEC_DESC_REQ * pSMB;
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struct kvec iov[1];
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cFYI(1, ("GetCifsACL"));
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rc = smb_init_ntransact(NT_TRANSACT_QUERY_SECURITY_DESC, 0,
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8 /* parm len */, tcon, (void **) &pSMB);
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if (rc)
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return rc;
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pSMB->MaxParameterCount = cpu_to_le32(4);
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/* BB TEST with big acls that might need to be e.g. larger than 16K */
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pSMB->MaxSetupCount = 0;
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pSMB->Fid = fid; /* file handle always le */
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pSMB->AclFlags = cpu_to_le32(CIFS_ACL_OWNER | CIFS_ACL_GROUP |
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CIFS_ACL_DACL);
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pSMB->ByteCount = cpu_to_le16(11); /* 3 bytes pad + 8 bytes parm */
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pSMB->hdr.smb_buf_length += 11;
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iov[0].iov_base = (char *)pSMB;
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iov[0].iov_len = pSMB->hdr.smb_buf_length + 4;
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rc = SendReceive2(xid, tcon->ses, iov, 1 /* num iovec */, &buf_type, 0);
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cifs_stats_inc(&tcon->num_acl_get);
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if (rc) {
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cFYI(1, ("Send error in QuerySecDesc = %d", rc));
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} else { /* decode response */
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struct sec_desc * psec_desc;
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__le32 * parm;
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int parm_len;
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int data_len;
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int acl_len;
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struct smb_com_ntransact_rsp * pSMBr;
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/* validate_nttransact */
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rc = validate_ntransact(iov[0].iov_base, (char **)&parm,
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(char **)&psec_desc,
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&parm_len, &data_len);
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if(rc)
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goto qsec_out;
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pSMBr = (struct smb_com_ntransact_rsp *)iov[0].iov_base;
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cERROR(1,("smb %p parm %p data %p",pSMBr,parm,psec_desc)); /* BB removeme BB */
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if (le32_to_cpu(pSMBr->ParameterCount) != 4) {
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rc = -EIO; /* bad smb */
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goto qsec_out;
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}
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/* BB check that data area is minimum length and as big as acl_len */
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acl_len = le32_to_cpu(*(__le32 *)parm);
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/* BB check if(acl_len > bufsize) */
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parse_sec_desc(psec_desc, acl_len);
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}
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qsec_out:
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if(buf_type == CIFS_SMALL_BUFFER)
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cifs_small_buf_release(iov[0].iov_base);
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else if(buf_type == CIFS_LARGE_BUFFER)
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cifs_buf_release(iov[0].iov_base);
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cifs_small_buf_release(pSMB);
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return rc;
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}
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/* Legacy Query Path Information call for lookup to old servers such
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as Win9x/WinME */
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int SMBQueryInformation(const int xid, struct cifsTconInfo *tcon,
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@ -4304,7 +4473,7 @@ int CIFSSMBNotify(const int xid, struct cifsTconInfo *tcon,
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{
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int rc = 0;
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struct smb_com_transaction_change_notify_req * pSMB = NULL;
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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;
|
||||
|
||||
@ -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"));
|
||||
|
||||
@ -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)) {
|
||||
|
||||
|
||||
@ -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,
|
||||
|
||||
Loading…
Reference in New Issue
Block a user