diff options
| author | Miles Bader <miles@gnu.org> | 1995-10-19 19:42:56 +0000 |
|---|---|---|
| committer | Miles Bader <miles@gnu.org> | 1995-10-19 19:42:56 +0000 |
| commit | 4741594bc52c58d3bb009b98ac4d32d10a217f90 (patch) | |
| tree | 5f7677ea13414fd5854869b701cb4ebcfabde114 /libdiskfs/rdwr-internal.c | |
| parent | db7c68a28467a43e7c3c09f6103ba37a5a272a7b (diff) | |
(_diskfs_rdwr_internal):
Pass the second protection arg to diskfs_get_filemap.
Only map our i/o region with as much permission as we need.
Diffstat (limited to 'libdiskfs/rdwr-internal.c')
| -rw-r--r-- | libdiskfs/rdwr-internal.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/libdiskfs/rdwr-internal.c b/libdiskfs/rdwr-internal.c index 900467cb..727c06b3 100644 --- a/libdiskfs/rdwr-internal.c +++ b/libdiskfs/rdwr-internal.c @@ -17,6 +17,7 @@ #include "priv.h" #include <string.h> +#include <fcntl.h> /* Actually read or write a file. The file size must already permit the requested access. NP is the file to read/write. DATA is a buffer @@ -36,7 +37,8 @@ _diskfs_rdwr_internal (struct node *np, int winoff; volatile int cc; memory_object_t memobj; - int err = 0; + vm_prot_t prot = dir ? (VM_PROT_READ | VM_PROT_WRITE) : VM_PROT_READ; + error_t err = 0; if (dir) assert (!diskfs_readonly); @@ -49,7 +51,7 @@ _diskfs_rdwr_internal (struct node *np, np->dn_set_atime = 1; } - memobj = diskfs_get_filemap (np); + memobj = diskfs_get_filemap (np, prot); while (amt > 0) { @@ -60,8 +62,7 @@ _diskfs_rdwr_internal (struct node *np, vax has a 1024 pagesize and with 8k blocks that seems like a reasonable number. */ err = vm_map (mach_task_self (), (u_int *)&window, 8 * __vm_page_size, - 0, 1, memobj, winoff, 0, VM_PROT_READ|VM_PROT_WRITE, - VM_PROT_READ|VM_PROT_WRITE, VM_INHERIT_NONE); + 0, 1, memobj, winoff, 0, prot, prot, VM_INHERIT_NONE); assert_perror (err); diskfs_register_memory_fault_area (diskfs_get_filemap_pager_struct (np), winoff, window, 8 * __vm_page_size); |