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kernel: rename VOP and syscall

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Matheus
2023-09-17 01:31:40 -03:00
parent 7173c11e59
commit ac0961c9a6
7 changed files with 167 additions and 7 deletions
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kernel-src/fs/tmpfs.c
+65 -2
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@@ -343,6 +343,68 @@ static int tmpfs_link(vnode_t *node, vnode_t *dir, char *name, cred_t *cred) {
return 0;
}
static int tmpfs_rename(vnode_t *source, char *oldname, vnode_t *target, char *newname, int flags) {
if (source->vfs != target->vfs)
return EXDEV;
if (source->type != V_TYPE_DIR || target->type != V_TYPE_DIR)
return ENOTDIR;
tmpfsnode_t *sourcedir = (tmpfsnode_t *)source;
tmpfsnode_t *targetdir = (tmpfsnode_t *)target;
size_t oldlen = strlen(oldname);
size_t newlen = strlen(newname);
if (target != source) {
VOP_LOCK(source);
VOP_LOCK(target);
} else {
VOP_LOCK(target);
}
// get original node
void *v;
int error = hashtable_get(&sourcedir->children, &v, oldname, oldlen);
if (error)
goto cleanup;
vnode_t *node = v;
vnode_t *oldnode = NULL;
// get old node in target
error = hashtable_get(&targetdir->children, &v, newname, newlen);
if (error != ENOENT && error != 0)
goto cleanup;
else if (error == 0) // found
oldnode = v;
// same link, rename is a no-op
if (sourcedir == targetdir && strcmp(oldname, newname) == 0)
goto cleanup;
// link node to new name
error = hashtable_set(&targetdir->children, node, newname, newlen, true);
if (error)
goto cleanup;
// remove old link. should not fail
__assert(hashtable_remove(&sourcedir->children, oldname, oldlen) == 0);
if (oldnode)
VOP_RELEASE(oldnode);
cleanup:
if (target != source) {
VOP_UNLOCK(target);
VOP_UNLOCK(source);
} else {
VOP_UNLOCK(target);
}
return error;
}
static int tmpfs_symlink(vnode_t *node, char *name, vattr_t *attr, char *path, cred_t *cred) {
if (node->type != V_TYPE_DIR)
return ENOTDIR;
@@ -458,7 +520,7 @@ static int tmpfs_getdents(vnode_t *node, dent_t *buffer, size_t count, uintmax_t
ent->d_off = offset;
ent->d_reclen = sizeof(dent_t);
ent->d_type = vfs_getposixtype(itmpnode->vnode.type);
strcpy(ent->d_name, entry->key);
memcpy(ent->d_name, entry->key, entry->keysize);
*readcount += 1;
}
@@ -505,7 +567,8 @@ static vops_t vnops = {
.mmap = tmpfs_mmap,
.munmap = tmpfs_munmap,
.getdents = tmpfs_getdents,
.resize = tmpfs_resize
.resize = tmpfs_resize,
.rename = tmpfs_rename
};
static tmpfsnode_t *newnode(vfs_t *vfs, int type) {