diff options
Diffstat (limited to 'libdiskfs/rdwr-internal.c')
| -rw-r--r-- | libdiskfs/rdwr-internal.c | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/libdiskfs/rdwr-internal.c b/libdiskfs/rdwr-internal.c index 8b2e1319..011558c5 100644 --- a/libdiskfs/rdwr-internal.c +++ b/libdiskfs/rdwr-internal.c @@ -27,12 +27,8 @@ DIR is set for writing and clear for reading. The inode must be locked. If NOTIME is set, then don't update the mtime or atime. */ error_t -_diskfs_rdwr_internal (struct node *np, - char *data, - off_t offset, - size_t *amt, - int dir, - int notime) +_diskfs_rdwr_internal (struct node *np, char *data, off_t offset, + mach_msg_type_number_t *amt, int dir, int notime) { memory_object_t memobj; vm_prot_t prot = dir ? (VM_PROT_READ | VM_PROT_WRITE) : VM_PROT_READ; @@ -63,8 +59,13 @@ _diskfs_rdwr_internal (struct node *np, offset + *amt > ((off_t) 1) << (sizeof(vm_offset_t) * 8)) err = EFBIG; else - err = pager_memcpy (diskfs_get_filemap_pager_struct (np), memobj, - offset, data, amt, prot); + { + size_t amount = *amt; + err = pager_memcpy (diskfs_get_filemap_pager_struct (np), memobj, + offset, data, &amount, prot); + if (!err) + *amt = amount; + } if (!diskfs_check_readonly () && !notime) { |