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devobj: allow read only device file mappings (OFED 3.3 support)

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Balazs Gerofi
2016-06-21 06:57:47 +09:00
parent d90900b6e6
commit a83ad620c8
4 changed files with 11 additions and 6 deletions
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8
executer/kernel/mcctrl/syscall.c
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@@ -1208,7 +1208,8 @@ struct pager_map_result {
int8_t padding[4];
};
static int pager_req_map(ihk_os_t os, int fd, size_t len, off_t off, uintptr_t result_rpa)
static int pager_req_map(ihk_os_t os, int fd, size_t len, off_t off,
uintptr_t result_rpa, int prot)
{
const ihk_device_t dev = ihk_os_to_dev(os);
const off_t pgoff = off / PAGE_SIZE;
@@ -1239,7 +1240,7 @@ static int pager_req_map(ihk_os_t os, int fd, size_t len, off_t off, uintptr_t r
if (file->f_mode & FMODE_READ) {
maxprot |= PROT_READ;
}
if (file->f_mode & FMODE_WRITE) {
if ((file->f_mode & FMODE_WRITE) && (prot ? (prot & PROT_WRITE) : 1)) {
maxprot |= PROT_WRITE;
}
if (!(file->f_path.mnt->mnt_flags & MNT_NOEXEC)) {
@@ -1414,7 +1415,8 @@ static long pager_call(ihk_os_t os, struct syscall_request *req)
break;
case PAGER_REQ_MAP:
ret = pager_req_map(os, req->args[1], req->args[2], req->args[3], req->args[4]);
ret = pager_req_map(os, req->args[1], req->args[2], req->args[3], req->args[4],
req->args[5]);
break;
case PAGER_REQ_PFN: