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vmmcache: initial implementation

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Matheus
2024-05-24 18:03:24 -03:00
parent 7673a365e8
commit 48b7fb4324
21 changed files with 772 additions and 134 deletions
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kernel-src/fs/ext2.c
+39 -4
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@@ -9,6 +9,7 @@
#include <mutex.h>
#include <logging.h>
#include <util.h>
#include <kernel/vmmcache.h>
#define INODE_ROOT 2
@@ -1262,9 +1263,12 @@ int ext2_write(vnode_t *vnode, void *buffer, size_t size, uintmax_t offset, int
endoffset = -1ll;
if (endoffset > inodesize) {
err = resizeinode(fs, node, endoffset);
if (err)
if (offset > inodesize) {
*writec = 0;
goto cleanup;
}
size = min(endoffset, inodesize) - offset;
}
err = rwbytes(fs, node, buffer, size, offset, true);
@@ -1281,10 +1285,17 @@ int ext2_write(vnode_t *vnode, void *buffer, size_t size, uintmax_t offset, int
}
int ext2_resize(vnode_t *vnode, size_t newsize, cred_t *cred) {
__assert(vnode->type == V_TYPE_REGULAR);
ext2node_t *node = (ext2node_t *)vnode;
ext2fs_t *fs = (ext2fs_t *)vnode->vfs;
VOP_LOCK(vnode);
int e = resizeinode(fs, node, newsize);
size_t size = INODE_SIZE(&node->inode);
int e = 0;
if (size != newsize) {
e = resizeinode(fs, node, newsize);
if (size > newsize)
vmmcache_truncate(vnode, newsize);
}
VOP_UNLOCK(vnode);
return e;
}
@@ -1546,6 +1557,27 @@ static int ext2_unlink(vnode_t *vnode, char *name, cred_t *cred) {
return err;
}
static int ext2_getpage(vnode_t *node, uintmax_t offset, struct page_t *page) {
// only regular files get cached
__assert(node->type == V_TYPE_REGULAR);
size_t readc;
int error = VOP_READ(node, MAKE_HHDM(pmm_getpageaddress(page)), PAGE_SIZE, offset, 0, &readc, NULL);
if (readc == 0)
return ENXIO;
return error;
}
static int ext2_putpage(vnode_t *node, uintmax_t offset, struct page_t *page) {
// only regular files get cached
__assert(node->type == V_TYPE_REGULAR);
size_t writec;
int error = VOP_WRITE(node, MAKE_HHDM(pmm_getpageaddress(page)), PAGE_SIZE, offset, 0, &writec, NULL);
__assert(writec != 0);
return error;
}
static int ext2_inactive(vnode_t *vnode) {
ext2node_t *node = (ext2node_t *)vnode;
ext2fs_t *fs = (ext2fs_t *)vnode->vfs;
@@ -1564,6 +1596,7 @@ static int ext2_inactive(vnode_t *vnode) {
__assert(hashtable_remove(&fs->inodetable, &node->id, sizeof(node->id)) == 0);
MUTEX_RELEASE(&fs->inodetablelock);
vmmcache_truncate(vnode, 0);
freeinode(fs, &node->inode, node->id);
slab_free(nodecache, node);
@@ -1722,7 +1755,9 @@ static vops_t vnops = {
.munmap = ext2_munmap,
.unlink = ext2_unlink,
.inactive = ext2_inactive,
.rename = ext2_rename
.rename = ext2_rename,
.getpage = ext2_getpage,
.putpage = ext2_putpage
};
void ext2_init() {