mirrors/Astral
1
0
Fork 0
mirror of https://github.com/Mathewnd/Astral.git synced 2026-10-30 05:58:22 +00:00
Code Issues Packages Projects Releases Wiki Activity

add tmpfs writing, vfs node tree dumping and fix some stupid issues

Browse Source
This commit is contained in:
Matheus
2022-08-04 20:18:57 -03:00
parent 479c51ec52
commit ea8f21fb71
5 changed files with 104 additions and 19 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/fs/tmpfs.c
+47 -6
View File
@@ -2,6 +2,8 @@
#include <kernel/vfs.h>
#include <kernel/alloc.h>
#include <arch/mmu.h>
#include <kernel/pmm.h>
#include <string.h>
static int tmpfs_mount(dirnode_t* mountpoint, vnode_t* device, int mountflags, void* fsinfo){
@@ -23,6 +25,34 @@ static int tmpfs_mount(dirnode_t* mountpoint, vnode_t* device, int mountflags, v
return 0;
}
static int tmpfs_write(int* error, vnode_t* node, void* buff, size_t count, size_t offset){
// TODO use virtual memory
size_t targetpage = (count + offset) / PAGE_SIZE;
if(node->st.st_blocks <= targetpage){
void* new = pmm_hhdmalloc(targetpage+1);
if(!new){
*error = ENOMEM;
return -1;
};
memcpy(new, node->fsdata, node->st.st_size);
pmm_free(node->fsdata, node->st.st_size / PAGE_SIZE + 1);
node->fsdata = new;
node->st.st_blocks = targetpage+1;
node->st.st_size = count + offset;
}
memcpy(node->fsdata + offset, buff, count);
if(offset + count > node->st.st_size)
node->st.st_size = offset + count;
*error = 0;
return count;
}
static int tmpfs_unmount(fs_t* fs) UNIMPLEMENTED
static int tmpfs_open(dirnode_t* parent, char* name) UNIMPLEMENTED
static int tmpfs_close(vnode_t* node) UNIMPLEMENTED
@@ -49,27 +79,38 @@ static int tmpfs_mkdir(dirnode_t* parent, char* name, mode_t mode){
}
static int tmpfs_create(dirnode_t* parent, char* name, mode_t mode){
vnode_t* node = vfs_newnode(name, parent->vnode.fs, NULL);
if(!node)
// TODO use virtual memory
void* firstpage = pmm_hhdmalloc(1);
if(!firstpage)
return ENOMEM;
vnode_t* node = vfs_newnode(name, parent->vnode.fs, NULL);
if(!node){
pmm_free(firstpage, 1);
return ENOMEM;
}
if(!hashtable_insert(&parent->children, name, node)){
pmm_free(firstpage, 1);
vfs_destroynode(node);
return ENOMEM;
}
node->parent = parent;
node->fsdata = firstpage;
stat* st = &node->st;
st->st_mode = MAKETYPE(TYPE_DIR) | GETMODE(mode);
st->st_blksize = PAGE_SIZE;
st->st_blocks = 1;
return 0;
}
static fscalls_t funcs = {
tmpfs_mount, tmpfs_unmount, tmpfs_open, tmpfs_close, tmpfs_mkdir, tmpfs_create
tmpfs_mount, tmpfs_unmount, tmpfs_open, tmpfs_close, tmpfs_mkdir, tmpfs_create, tmpfs_write
};