-int cifs_posix_open(char *full_path, struct inode **pinode,
- struct super_block *sb, int mode, int oflags,
- __u32 *poplock, __u16 *pnetfid, int xid)
-{
- int rc;
- FILE_UNIX_BASIC_INFO *presp_data;
- __u32 posix_flags = 0;
- struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
- struct cifs_fattr fattr;
- struct tcon_link *tlink;
- struct cifsTconInfo *tcon;
-
- cFYI(1, "posix open %s", full_path);
-
- presp_data = kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
- if (presp_data == NULL)
- return -ENOMEM;
-
-/* So far cifs posix extensions can only map the following flags.
- There are other valid fmode oflags such as FMODE_LSEEK, FMODE_PREAD, but
- so far we do not seem to need them, and we can treat them as local only */
- if ((oflags & (FMODE_READ | FMODE_WRITE)) ==
- (FMODE_READ | FMODE_WRITE))
- posix_flags = SMB_O_RDWR;
- else if (oflags & FMODE_READ)
- posix_flags = SMB_O_RDONLY;
- else if (oflags & FMODE_WRITE)
- posix_flags = SMB_O_WRONLY;
- if (oflags & O_CREAT)
- posix_flags |= SMB_O_CREAT;
- if (oflags & O_EXCL)
- posix_flags |= SMB_O_EXCL;
- if (oflags & O_TRUNC)
- posix_flags |= SMB_O_TRUNC;
- /* be safe and imply O_SYNC for O_DSYNC */
- if (oflags & O_DSYNC)
- posix_flags |= SMB_O_SYNC;
- if (oflags & O_DIRECTORY)
- posix_flags |= SMB_O_DIRECTORY;
- if (oflags & O_NOFOLLOW)
- posix_flags |= SMB_O_NOFOLLOW;
- if (oflags & O_DIRECT)
- posix_flags |= SMB_O_DIRECT;
-
- mode &= ~current_umask();
-
- tlink = cifs_sb_tlink(cifs_sb);
- if (IS_ERR(tlink)) {
- rc = PTR_ERR(tlink);
- goto posix_open_ret;
- }
-
- tcon = tlink_tcon(tlink);
- rc = CIFSPOSIXCreate(xid, tcon, posix_flags, mode, pnetfid, presp_data,
- poplock, full_path, cifs_sb->local_nls,
- cifs_sb->mnt_cifs_flags &
- CIFS_MOUNT_MAP_SPECIAL_CHR);
- cifs_put_tlink(tlink);
-
- if (rc)
- goto posix_open_ret;
-
- if (presp_data->Type == cpu_to_le32(-1))
- goto posix_open_ret; /* open ok, caller does qpathinfo */
-
- if (!pinode)
- goto posix_open_ret; /* caller does not need info */
-
- cifs_unix_basic_to_fattr(&fattr, presp_data, cifs_sb);
-
- /* get new inode and set it up */
- if (*pinode == NULL) {
- cifs_fill_uniqueid(sb, &fattr);
- *pinode = cifs_iget(sb, &fattr);
- if (!*pinode) {
- rc = -ENOMEM;
- goto posix_open_ret;
- }
- } else {
- cifs_fattr_to_inode(*pinode, &fattr);
- }
-
-posix_open_ret:
- kfree(presp_data);
- return rc;
-}
-