static int prealloc_ftruncate(vfs_handle_struct * handle, files_struct * fsp, SMB_OFF_T offset) { SMB_OFF_T *psize; int ret = SMB_VFS_NEXT_FTRUNCATE(handle, fsp, offset); /* Maintain the allocated space even in the face of truncates. */ if ((psize = VFS_FETCH_FSP_EXTENSION(handle, fsp))) { preallocate_space(fsp->fh->fd, *psize); } return ret; }
static int prealloc_ftruncate(vfs_handle_struct * handle, files_struct * fsp, int fd, SMB_OFF_T offset) { SMB_OFF_T *psize; int ret = SMB_VFS_NEXT_FTRUNCATE(handle, fsp, fd, offset); /* Maintain the allocated space even in the face of truncates. If the * truncate succeeded, we know that the current file size is the size * the caller requested. */ if (ret == 0 ) { if ((psize = VFS_FETCH_FSP_EXTENSION(handle, fsp))) { preallocate_space(fd, offset, *psize); } } return ret; }
static int prealloc_open(vfs_handle_struct* handle, const char * fname, files_struct * fsp, int flags, mode_t mode) { int fd; SMB_OFF_T size = 0; const char * dot; char fext[10]; if (!(flags & (O_CREAT|O_TRUNC))) { /* Caller is not intending to rewrite the file. Let's not mess * with the allocation in this case. */ goto normal_open; } *fext = '\0'; dot = strrchr(fname, '.'); if (dot && *++dot) { if (strlen(dot) < sizeof(fext)) { strncpy(fext, dot, sizeof(fext)); strnorm(fext, CASE_LOWER); } } if (*fext == '\0') { goto normal_open; } /* Syntax for specifying preallocation size is: * MODULE: <extension> = <size> * where * <extension> is the file extension in lower case * <size> is a size like 10, 10K, 10M */ size = conv_str_size(lp_parm_const_string(SNUM(handle->conn), MODULE, fext, NULL)); if (size <= 0) { /* No need to preallocate this file. */ goto normal_open; } fd = SMB_VFS_NEXT_OPEN(handle, fname, fsp, flags, mode); if (fd < 0) { return fd; } /* Prellocate only if the file is being created or replaced. Note that * Samba won't ever pass down O_TRUNC, which is why we have to handle * truncate calls specially. */ if ((flags & O_CREAT) || (flags & O_TRUNC)) { SMB_OFF_T * psize; psize = VFS_ADD_FSP_EXTENSION(handle, fsp, SMB_OFF_T); if (psize == NULL || *psize == -1) { return fd; } DEBUG(module_debug, ("%s: preallocating %s (fd=%d) to %lld bytes\n", MODULE, fname, fd, (long long)size)); *psize = size; if (preallocate_space(fd, 0, *psize) < 0) { VFS_REMOVE_FSP_EXTENSION(handle, fsp); } } return fd; normal_open: /* We are not creating or replacing a file. Skip the * preallocation. */ DEBUG(module_debug, ("%s: skipping preallocation for %s\n", MODULE, fname)); return SMB_VFS_NEXT_OPEN(handle, fname, fsp, flags, mode); }