diff options
| -rw-r--r-- | tmpfs/node.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/tmpfs/node.c b/tmpfs/node.c index aae59c74..92768ee8 100644 --- a/tmpfs/node.c +++ b/tmpfs/node.c @@ -433,6 +433,8 @@ diskfs_grow (struct node *np, off_t size, struct protid *cred) mach_port_t diskfs_get_filemap (struct node *np, vm_prot_t prot) { + error_t err; + if (np->dn->type != DT_REG) { errno = EOPNOTSUPP; /* ? */ @@ -440,7 +442,10 @@ diskfs_get_filemap (struct node *np, vm_prot_t prot) } if (default_pager == MACH_PORT_NULL) - return EIO; + { + errno = EIO; + return MACH_PORT_NULL; + } /* We don't bother to create the memory object until the first time we need it (i.e. first mapping or i/o). This way we might have a clue @@ -465,6 +470,12 @@ diskfs_get_filemap (struct node *np, vm_prot_t prot) } /* XXX always writable */ + + /* Add a reference for each call, the caller will deallocate it. */ + err = mach_port_mod_refs (mach_task_self (), np->dn->u.reg.memobj, + MACH_PORT_RIGHT_SEND, +1); + assert_perror (err); + return np->dn->u.reg.memobj; } @@ -475,7 +486,6 @@ diskfs_get_filemap (struct node *np, vm_prot_t prot) struct pager * diskfs_get_filemap_pager_struct (struct node *np) { - assert (!"fault on default pager object?"); return 0; } |