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[CIFS] acl support part 6
Acked-by: Shirish Pargaonkar <shirishp@us.ibm.com> CC: Cyrill Gorcunov <gorcunov@gmail.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
This commit is contained in:
Steve French
parent
44093ca2fe
commit
630f3f0c45
10 changed files with 169 additions and 60 deletions
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@ -97,7 +97,7 @@ int match_sid(struct cifs_sid *ctsid)
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/* if the two SIDs (roughly equivalent to a UUID for a user or group) are
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the same returns 1, if they do not match returns 0 */
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int compare_sids(struct cifs_sid *ctsid, struct cifs_sid *cwsid)
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int compare_sids(const struct cifs_sid *ctsid, const struct cifs_sid *cwsid)
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{
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int i;
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int num_subauth, num_sat, num_saw;
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@ -129,28 +129,77 @@ int compare_sids(struct cifs_sid *ctsid, struct cifs_sid *cwsid)
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return (1); /* sids compare/match */
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}
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void get_mode_from_acl(struct inode * inode, const char * path)
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/*
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change posix mode to reflect permissions
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pmode is the existing mode (we only want to overwrite part of this
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bits to set can be: S_IRWXU, S_IRWXG or S_IRWXO ie 00700 or 00070 or 00007
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*/
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static void access_flags_to_mode(__u32 access_flags, umode_t * pmode,
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umode_t bits_to_set)
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{
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#ifdef CONFIG_CIFS_DEBUG2
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cFYI(1, ("access flags 0x%x mode now 0x%x", access_flags, *pmode);
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#endif
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return;
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}
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/* Translate the CIFS ACL (simlar to NTFS ACL) for a file into mode bits */
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void acl_to_uid_mode(struct inode *inode, const char *path)
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{
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struct cifsFileInfo *open_file;
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int unlock_file = FALSE;
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int xid;
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int rc = -EIO;
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__u16 fid;
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struct super_block *sb;
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struct cifs_sb_info *cifs_sb;
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cFYI(1, ("get mode from ACL for %s", path));
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if (inode == NULL)
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return;
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/* find an open readable handle
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if handle found
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lock handle
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else open file
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if no open file can not hurt to check if path is null
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GetCIFSACL
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for all ACEs in ACL {
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if U or G or O
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inode->i_mode = parse_ace(file_type, UG or O, ace->perms, inode->i_mode)
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else continue
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}
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if handle open close it
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else unlock handle */
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xid = GetXid();
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open_file = find_readable_file(CIFS_I(inode));
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if (open_file) {
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unlock_file = TRUE;
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fid = open_file->netfid;
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} else {
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int oplock = FALSE;
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/* open file */
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sb = inode->i_sb;
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if (sb == NULL) {
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FreeXid(xid);
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return;
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}
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cifs_sb = CIFS_SB(sb);
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rc = CIFSSMBOpen(xid, cifs_sb->tcon, path, FILE_OPEN,
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GENERIC_READ, 0, &fid, &oplock, NULL,
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cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
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CIFS_MOUNT_MAP_SPECIAL_CHR);
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if (rc != 0) {
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cERROR(1, ("Unable to open file to get ACL"));
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FreeXid(xid);
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return;
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}
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}
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/* rc = CIFSSMBGetCIFSACL(xid, cifs_sb->tcon, fid, pntsd, acllen,
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ACL_TYPE_ACCESS); */
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if (unlock_file == TRUE)
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atomic_dec(&open_file->wrtPending);
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else
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CIFSSMBClose(xid, cifs_sb->tcon, fid);
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/* parse ACEs e.g.
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rc = parse_sec_desc(pntsd, acllen, inode);
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*/
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FreeXid(xid);
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return;
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}
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@ -193,7 +242,8 @@ static void parse_ace(struct cifs_ace *pace, char *end_of_acl)
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static void parse_dacl(struct cifs_acl *pdacl, char *end_of_acl,
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struct cifs_sid *pownersid, struct cifs_sid *pgrpsid)
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struct cifs_sid *pownersid, struct cifs_sid *pgrpsid
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struct inode *inode)
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{
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int i;
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int num_aces = 0;
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@ -281,7 +331,8 @@ static int parse_sid(struct cifs_sid *psid, char *end_of_acl)
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/* Convert CIFS ACL to POSIX form */
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int parse_sec_desc(struct cifs_ntsd *pntsd, int acl_len)
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static int parse_sec_desc(struct cifs_ntsd *pntsd, int acl_len,
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struct inode *inode)
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{
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int rc;
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struct cifs_sid *owner_sid_ptr, *group_sid_ptr;
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@ -310,14 +361,14 @@ int parse_sec_desc(struct cifs_ntsd *pntsd, int acl_len)
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if (rc)
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return rc;
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parse_dacl(dacl_ptr, end_of_acl, owner_sid_ptr, group_sid_ptr);
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parse_dacl(dacl_ptr, end_of_acl, owner_sid_ptr, group_sid_ptr, inode);
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/* cifscred->uid = owner_sid_ptr->rid;
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cifscred->gid = group_sid_ptr->rid;
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memcpy((void *)(&(cifscred->osid)), (void *)owner_sid_ptr,
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sizeof (struct cifs_sid));
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sizeof(struct cifs_sid));
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memcpy((void *)(&(cifscred->gsid)), (void *)group_sid_ptr,
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sizeof (struct cifs_sid)); */
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sizeof(struct cifs_sid)); */
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return (0);
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@ -61,6 +61,9 @@ extern int checkSMB(struct smb_hdr *smb, __u16 mid, unsigned int length);
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extern int is_valid_oplock_break(struct smb_hdr *smb, struct TCP_Server_Info *);
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extern int is_size_safe_to_change(struct cifsInodeInfo *, __u64 eof);
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extern struct cifsFileInfo *find_writable_file(struct cifsInodeInfo *);
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#ifdef CONFIG_CIFS_EXPERIMENTAL
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extern struct cifsFileInfo *find_readable_file(struct cifsInodeInfo *);
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#endif
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extern unsigned int smbCalcSize(struct smb_hdr *ptr);
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extern unsigned int smbCalcSize_LE(struct smb_hdr *ptr);
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extern int decode_negTokenInit(unsigned char *security_blob, int length,
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@ -92,7 +95,7 @@ extern int cifs_get_inode_info(struct inode **pinode,
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extern int cifs_get_inode_info_unix(struct inode **pinode,
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const unsigned char *search_path,
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struct super_block *sb, int xid);
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extern void get_mode_from_acl(struct inode * inode, const char * search_path);
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extern void acl_to_uid_mode(struct inode *inode, const char *search_path);
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extern int cifs_mount(struct super_block *, struct cifs_sb_info *, char *,
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const char *);
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extern int cifs_umount(struct super_block *, struct cifs_sb_info *);
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@ -311,7 +314,6 @@ extern void setup_ntlmv2_rsp(struct cifsSesInfo *, char *,
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#ifdef CONFIG_CIFS_WEAK_PW_HASH
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extern void calc_lanman_hash(struct cifsSesInfo *ses, char *lnm_session_key);
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#endif /* CIFS_WEAK_PW_HASH */
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extern int parse_sec_desc(struct cifs_ntsd *, int);
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extern int CIFSSMBCopy(int xid,
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struct cifsTconInfo *source_tcon,
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const char *fromName,
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@ -336,8 +338,7 @@ extern int CIFSSMBSetEA(const int xid, struct cifsTconInfo *tcon,
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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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__u16 fid, struct cifs_ntsd **acl_inf, __u32 *buflen);
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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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@ -2526,12 +2526,15 @@ smb_init_ntransact(const __u16 sub_command, const int setup_count,
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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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__u32 *pdatalen, __u32 *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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*pdatalen = 0;
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*pparmlen = 0;
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if (buf == NULL)
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return -EINVAL;
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@ -2568,6 +2571,8 @@ validate_ntransact(char *buf, char **ppparm, char **ppdata,
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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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*pdatalen = data_count;
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*pparmlen = parm_count;
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return 0;
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}
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#endif /* CIFS_EXPERIMENTAL */
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@ -3069,8 +3074,7 @@ GetExtAttrOut:
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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)
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struct cifs_ntsd **acl_inf, __u32 *pbuflen)
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{
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int rc = 0;
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int buf_type = 0;
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@ -3079,6 +3083,9 @@ CIFSSMBGetCIFSACL(const int xid, struct cifsTconInfo *tcon, __u16 fid,
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cFYI(1, ("GetCifsACL"));
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*pbuflen = 0;
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*acl_inf = NULL;
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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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@ -3101,34 +3108,52 @@ CIFSSMBGetCIFSACL(const int xid, struct cifsTconInfo *tcon, __u16 fid,
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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 cifs_ntsd *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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__u32 parm_len;
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__u32 acl_len;
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struct smb_com_ntransact_rsp *pSMBr;
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char *pdata;
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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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&pdata, &parm_len, pbuflen);
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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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cFYI(1, ("smb %p parm %p data %p", pSMBr, parm, psec_desc));
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cFYI(1, ("smb %p parm %p data %p", pSMBr, parm, *acl_inf));
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if (le32_to_cpu(pSMBr->ParameterCount) != 4) {
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rc = -EIO; /* bad smb */
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*pbuflen = 0;
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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(*parm);
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/* BB check if (acl_len > bufsize) */
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if (acl_len != *pbuflen) {
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cERROR(1, ("acl length %d does not match %d",
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acl_len, *pbuflen));
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if (*pbuflen > acl_len)
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*pbuflen = acl_len;
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}
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parse_sec_desc(psec_desc, acl_len);
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/* check if buffer is big enough for the acl
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header followed by the smallest SID */
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if ((*pbuflen < sizeof(struct cifs_ntsd) + 8) ||
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(*pbuflen >= 64 * 1024)) {
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cERROR(1, ("bad acl length %d", *pbuflen));
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rc = -EINVAL;
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*pbuflen = 0;
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} else {
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*acl_inf = kmalloc(*pbuflen, GFP_KERNEL);
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if (*acl_inf == NULL) {
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*pbuflen = 0;
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rc = -ENOMEM;
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}
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memcpy(*acl_inf, pdata, *pbuflen);
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}
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}
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qsec_out:
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if (buf_type == CIFS_SMALL_BUFFER)
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@ -3383,7 +3408,7 @@ UnixQPathInfoRetry:
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memcpy((char *) pFindData,
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(char *) &pSMBr->hdr.Protocol +
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data_offset,
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sizeof (FILE_UNIX_BASIC_INFO));
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sizeof(FILE_UNIX_BASIC_INFO));
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}
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}
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cifs_buf_release(pSMB);
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@ -3651,7 +3676,7 @@ int CIFSFindNext(const int xid, struct cifsTconInfo *tcon,
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pSMB->SubCommand = cpu_to_le16(TRANS2_FIND_NEXT);
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pSMB->SearchHandle = searchHandle; /* always kept as le */
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pSMB->SearchCount =
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cpu_to_le16(CIFSMaxBufSize / sizeof (FILE_UNIX_INFO));
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cpu_to_le16(CIFSMaxBufSize / sizeof(FILE_UNIX_INFO));
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pSMB->InformationLevel = cpu_to_le16(psrch_inf->info_level);
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pSMB->ResumeKey = psrch_inf->resume_key;
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pSMB->SearchFlags =
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@ -4333,7 +4358,7 @@ QFSDeviceRetry:
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} else { /* decode response */
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rc = validate_t2((struct smb_t2_rsp *)pSMBr);
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if (rc || (pSMBr->ByteCount < sizeof (FILE_SYSTEM_DEVICE_INFO)))
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if (rc || (pSMBr->ByteCount < sizeof(FILE_SYSTEM_DEVICE_INFO)))
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rc = -EIO; /* bad smb */
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else {
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__u16 data_offset = le16_to_cpu(pSMBr->t2.DataOffset);
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@ -1026,6 +1026,37 @@ static ssize_t cifs_write(struct file *file, const char *write_data,
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return total_written;
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}
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#ifdef CONFIG_CIFS_EXPERIMENTAL
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struct cifsFileInfo *find_readable_file(struct cifsInodeInfo *cifs_inode)
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{
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struct cifsFileInfo *open_file = NULL;
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read_lock(&GlobalSMBSeslock);
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/* we could simply get the first_list_entry since write-only entries
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are always at the end of the list but since the first entry might
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have a close pending, we go through the whole list */
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list_for_each_entry(open_file, &cifs_inode->openFileList, flist) {
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if (open_file->closePend)
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continue;
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if (open_file->pfile && ((open_file->pfile->f_flags & O_RDWR) ||
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(open_file->pfile->f_flags & O_RDONLY))) {
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if (!open_file->invalidHandle) {
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/* found a good file */
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/* lock it so it will not be closed on us */
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atomic_inc(&open_file->wrtPending);
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read_unlock(&GlobalSMBSeslock);
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return open_file;
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} /* else might as well continue, and look for
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another, or simply have the caller reopen it
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again rather than trying to fix this handle */
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} else /* write only file */
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break; /* write only files are last so must be done */
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}
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read_unlock(&GlobalSMBSeslock);
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return NULL;
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}
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#endif
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struct cifsFileInfo *find_writable_file(struct cifsInodeInfo *cifs_inode)
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{
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struct cifsFileInfo *open_file;
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@ -530,7 +530,7 @@ int cifs_get_inode_info(struct inode **pinode,
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#ifdef CONFIG_CIFS_EXPERIMENTAL
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if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) {
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cFYI(1, ("Getting mode bits from ACL"));
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get_mode_from_acl(inode, search_path);
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acl_to_uid_mode(inode, search_path);
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}
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#endif
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if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
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@ -276,8 +276,8 @@ hmac_md5_init_rfc2104(unsigned char *key, int key_len,
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}
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/* start out by storing key in pads */
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memset(ctx->k_ipad, 0, sizeof (ctx->k_ipad));
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memset(ctx->k_opad, 0, sizeof (ctx->k_opad));
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memset(ctx->k_ipad, 0, sizeof(ctx->k_ipad));
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memset(ctx->k_opad, 0, sizeof(ctx->k_opad));
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memcpy(ctx->k_ipad, key, key_len);
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memcpy(ctx->k_opad, key, key_len);
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@ -307,8 +307,8 @@ hmac_md5_init_limK_to_64(const unsigned char *key, int key_len,
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}
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/* start out by storing key in pads */
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memset(ctx->k_ipad, 0, sizeof (ctx->k_ipad));
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memset(ctx->k_opad, 0, sizeof (ctx->k_opad));
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memset(ctx->k_ipad, 0, sizeof(ctx->k_ipad));
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memset(ctx->k_opad, 0, sizeof(ctx->k_opad));
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memcpy(ctx->k_ipad, key, key_len);
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memcpy(ctx->k_opad, key, key_len);
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@ -73,7 +73,7 @@ sesInfoAlloc(void)
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{
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struct cifsSesInfo *ret_buf;
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|
||||
ret_buf = kzalloc(sizeof (struct cifsSesInfo), GFP_KERNEL);
|
||||
ret_buf = kzalloc(sizeof(struct cifsSesInfo), GFP_KERNEL);
|
||||
if (ret_buf) {
|
||||
write_lock(&GlobalSMBSeslock);
|
||||
atomic_inc(&sesInfoAllocCount);
|
||||
|
|
@ -109,7 +109,7 @@ struct cifsTconInfo *
|
|||
tconInfoAlloc(void)
|
||||
{
|
||||
struct cifsTconInfo *ret_buf;
|
||||
ret_buf = kzalloc(sizeof (struct cifsTconInfo), GFP_KERNEL);
|
||||
ret_buf = kzalloc(sizeof(struct cifsTconInfo), GFP_KERNEL);
|
||||
if (ret_buf) {
|
||||
write_lock(&GlobalSMBSeslock);
|
||||
atomic_inc(&tconInfoAllocCount);
|
||||
|
|
@ -298,7 +298,7 @@ header_assemble(struct smb_hdr *buffer, char smb_command /* command */ ,
|
|||
memset(temp, 0, 256); /* bigger than MAX_CIFS_HDR_SIZE */
|
||||
|
||||
buffer->smb_buf_length =
|
||||
(2 * word_count) + sizeof (struct smb_hdr) -
|
||||
(2 * word_count) + sizeof(struct smb_hdr) -
|
||||
4 /* RFC 1001 length field does not count */ +
|
||||
2 /* for bcc field itself */ ;
|
||||
/* Note that this is the only network field that has to be converted
|
||||
|
|
@ -422,8 +422,8 @@ checkSMB(struct smb_hdr *smb, __u16 mid, unsigned int length)
|
|||
__u32 clc_len; /* calculated length */
|
||||
cFYI(0, ("checkSMB Length: 0x%x, smb_buf_length: 0x%x", length, len));
|
||||
|
||||
if (length < 2 + sizeof (struct smb_hdr)) {
|
||||
if ((length >= sizeof (struct smb_hdr) - 1)
|
||||
if (length < 2 + sizeof(struct smb_hdr)) {
|
||||
if ((length >= sizeof(struct smb_hdr) - 1)
|
||||
&& (smb->Status.CifsError != 0)) {
|
||||
smb->WordCount = 0;
|
||||
/* some error cases do not return wct and bcc */
|
||||
|
|
|
|||
|
|
@ -793,8 +793,8 @@ map_smb_to_linux_error(struct smb_hdr *smb, int logErr)
|
|||
if (smberrclass == ERRDOS) { /* 1 byte field no need to byte reverse */
|
||||
for (i = 0;
|
||||
i <
|
||||
sizeof (mapping_table_ERRDOS) /
|
||||
sizeof (struct smb_to_posix_error); i++) {
|
||||
sizeof(mapping_table_ERRDOS) /
|
||||
sizeof(struct smb_to_posix_error); i++) {
|
||||
if (mapping_table_ERRDOS[i].smb_err == 0)
|
||||
break;
|
||||
else if (mapping_table_ERRDOS[i].smb_err ==
|
||||
|
|
@ -807,8 +807,8 @@ map_smb_to_linux_error(struct smb_hdr *smb, int logErr)
|
|||
} else if (smberrclass == ERRSRV) { /* server class of error codes */
|
||||
for (i = 0;
|
||||
i <
|
||||
sizeof (mapping_table_ERRSRV) /
|
||||
sizeof (struct smb_to_posix_error); i++) {
|
||||
sizeof(mapping_table_ERRSRV) /
|
||||
sizeof(struct smb_to_posix_error); i++) {
|
||||
if (mapping_table_ERRSRV[i].smb_err == 0)
|
||||
break;
|
||||
else if (mapping_table_ERRSRV[i].smb_err ==
|
||||
|
|
@ -837,14 +837,14 @@ map_smb_to_linux_error(struct smb_hdr *smb, int logErr)
|
|||
unsigned int
|
||||
smbCalcSize(struct smb_hdr *ptr)
|
||||
{
|
||||
return (sizeof (struct smb_hdr) + (2 * ptr->WordCount) +
|
||||
return (sizeof(struct smb_hdr) + (2 * ptr->WordCount) +
|
||||
2 /* size of the bcc field */ + BCC(ptr));
|
||||
}
|
||||
|
||||
unsigned int
|
||||
smbCalcSize_LE(struct smb_hdr *ptr)
|
||||
{
|
||||
return (sizeof (struct smb_hdr) + (2 * ptr->WordCount) +
|
||||
return (sizeof(struct smb_hdr) + (2 * ptr->WordCount) +
|
||||
2 /* size of the bcc field */ + le16_to_cpu(BCC_LE(ptr)));
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -135,7 +135,7 @@ E_md4hash(const unsigned char *passwd, unsigned char *p16)
|
|||
|
||||
wpwd[len] = 0; /* Ensure string is null terminated */
|
||||
/* Calculate length in bytes */
|
||||
len = _my_wcslen(wpwd) * sizeof (__u16);
|
||||
len = _my_wcslen(wpwd) * sizeof(__u16);
|
||||
|
||||
mdfour(p16, (unsigned char *) wpwd, len);
|
||||
memset(wpwd, 0, 129 * 2);
|
||||
|
|
@ -167,7 +167,7 @@ nt_lm_owf_gen(char *pwd, unsigned char nt_p16[16], unsigned char p16[16])
|
|||
E_P16((unsigned char *) passwd, (unsigned char *) p16);
|
||||
|
||||
/* clear out local copy of user's password (just being paranoid). */
|
||||
memset(passwd, '\0', sizeof (passwd));
|
||||
memset(passwd, '\0', sizeof(passwd));
|
||||
}
|
||||
#endif
|
||||
|
||||
|
|
|
|||
|
|
@ -265,6 +265,8 @@ ssize_t cifs_getxattr(struct dentry *direntry, const char *ea_name,
|
|||
else if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) {
|
||||
__u16 fid;
|
||||
int oplock = FALSE;
|
||||
struct cifs_ntsd *pacl = NULL;
|
||||
__u32 buflen = 0;
|
||||
if (experimEnabled)
|
||||
rc = CIFSSMBOpen(xid, pTcon, full_path,
|
||||
FILE_OPEN, GENERIC_READ, 0, &fid,
|
||||
|
|
@ -274,9 +276,8 @@ ssize_t cifs_getxattr(struct dentry *direntry, const char *ea_name,
|
|||
/* else rc is EOPNOTSUPP from above */
|
||||
|
||||
if(rc == 0) {
|
||||
rc = CIFSSMBGetCIFSACL(xid, pTcon, fid,
|
||||
ea_value, buf_size,
|
||||
ACL_TYPE_ACCESS);
|
||||
rc = CIFSSMBGetCIFSACL(xid, pTcon, fid, &pacl,
|
||||
&buflen);
|
||||
CIFSSMBClose(xid, pTcon, fid);
|
||||
}
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in a new issue