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tmpfs: fix mmap

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Matheus
2023-05-06 19:25:48 -03:00
parent bb5c46d645
commit 8ccd0bebcb
1 changed files with 6 additions and 2 deletions
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kernel-src/fs/tmpfs.c
+6 -2
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@@ -358,12 +358,14 @@ static int tmpfs_readlink(vnode_t *node, char **link, cred_t *cred) {
return 0;
}
#define MMAPTMPFLAGS (ARCH_MMU_FLAGS_READ | ARCH_MMU_FLAGS_NOEXEC | ARCH_MMU_FLAGS_WRITE)
static int tmpfs_mmap(vnode_t *node, void *addr, uintmax_t offset, int flags, cred_t *cred) {
void *paddr = pmm_alloc(1, PMM_SECTION_DEFAULT);
if (paddr == NULL)
return ENOMEM;
if (arch_mmu_map(_cpu()->vmmctx->pagetable, paddr, addr, vnodeflagstommuflags(flags)) == false) {
if (arch_mmu_map(_cpu()->vmmctx->pagetable, paddr, addr, MMAPTMPFLAGS) == false) {
pmm_free(paddr, 1);
return ENOMEM;
}
@@ -378,11 +380,13 @@ static int tmpfs_mmap(vnode_t *node, void *addr, uintmax_t offset, int flags, cr
memset((void *)((uintptr_t)addr + readc), 0, PAGE_SIZE - readc);
arch_mmu_remap(_cpu()->vmmctx->pagetable, paddr, addr, vnodeflagstommuflags(flags));
return 0;
}
static int tmpfs_munmap(vnode_t *node, void *addr, uintmax_t offset, int flags, cred_t *cred) {
if ((flags & V_FFLAGS_SHARED) == 0) {
if (flags & V_FFLAGS_SHARED) {
size_t wc;
// TODO no growing flag
__assert(tmpfs_write(node, addr, PAGE_SIZE, offset, flags, &wc, cred) == 0);