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kernel: do preparation work for copyless read/write

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Matheus
2024-09-18 21:17:37 -03:00
parent 1140244816
commit 611f13b562
12 changed files with 134 additions and 47 deletions
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kernel-src/fs/ext2.c
+4
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@@ -1317,6 +1317,8 @@ static int ext2_readlink(vnode_t *vnode, char **link, cred_t *cred) {
return err;
}
// this *should*, by the rules of the vnode ops, accept a user buffer. however, this will never be the case. all I/O will
// go through the page cache
static int ext2_read(vnode_t *vnode, void *buffer, size_t size, uintmax_t offset, int flags, size_t *readc, cred_t *cred) {
if (vnode->type == V_TYPE_DIR)
return EISDIR;
@@ -1356,6 +1358,8 @@ static int ext2_read(vnode_t *vnode, void *buffer, size_t size, uintmax_t offset
return err;
}
// this *should*, by the rules of the vnode ops, accept a user buffer. however, this will never be the case. all I/O will
// go through the page cache
int ext2_write(vnode_t *vnode, void *buffer, size_t size, uintmax_t offset, int flags, size_t *writec, cred_t *cred) {
if (vnode->type == V_TYPE_DIR)
return EISDIR;