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ext2: report ROFS

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This commit is contained in:
K. Lange 2021-09-07 19:00:16 +09:00
parent fbb4ba506d
commit ff8714a318
1 changed files with 16 additions and 7 deletions
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23
modules/ext2.c
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@ -939,6 +939,7 @@ static int mkdir_ext2(fs_node_t * parent, char * name, mode_t permission) {
if (!name) return -EINVAL;
ext2_fs_t * this = parent->device;
if (!(this->flags & EXT2_FLAG_READWRITE)) return -EROFS;
/* first off, check if it exists */
fs_node_t * check = finddir_ext2(parent, name);
@ -1034,6 +1035,7 @@ static int create_ext2(fs_node_t * parent, char * name, mode_t permission) {
if (!name) return -EINVAL;
ext2_fs_t * this = parent->device;
if (!(this->flags & EXT2_FLAG_READWRITE)) return -EROFS;
/* first off, check if it exists */
fs_node_t * check = finddir_ext2(parent, name);
@ -1094,6 +1096,7 @@ static int create_ext2(fs_node_t * parent, char * name, mode_t permission) {
static int chmod_ext2(fs_node_t * node, mode_t mode) {
ext2_fs_t * this = node->device;
if (!(this->flags & EXT2_FLAG_READWRITE)) return -EROFS;
ext2_inodetable_t * inode = read_inode(this,node->inode);
@ -1213,6 +1216,7 @@ static fs_node_t * finddir_ext2(fs_node_t *node, char *name) {
static int unlink_ext2(fs_node_t * node, char * name) {
/* XXX this is a very bad implementation */
ext2_fs_t * this = (ext2_fs_t *)node->device;
if (!(this->flags & EXT2_FLAG_READWRITE)) return -EROFS;
ext2_inodetable_t *inode = read_inode(this,node->inode);
//assert(inode->mode & EXT2_S_IFDIR);
@ -1387,6 +1391,8 @@ static ssize_t write_inode_buffer(ext2_fs_t * this, ext2_inodetable_t * inode, u
static ssize_t write_ext2(fs_node_t *node, off_t offset, size_t size, uint8_t *buffer) {
ext2_fs_t * this = (ext2_fs_t *)node->device;
if (!(this->flags & EXT2_FLAG_READWRITE)) return -EROFS;
ext2_inodetable_t * inode = read_inode(this, node->inode);
ssize_t rv = write_inode_buffer(this, inode, node->inode, offset, size, buffer);
@ -1396,6 +1402,8 @@ static ssize_t write_ext2(fs_node_t *node, off_t offset, size_t size, uint8_t *b
static int truncate_ext2(fs_node_t * node) {
ext2_fs_t * this = node->device;
if (!(this->flags & EXT2_FLAG_READWRITE)) return -EROFS;
ext2_inodetable_t * inode = read_inode(this,node->inode);
inode->size = 0;
write_inode(this, inode, node->inode);
@ -1438,6 +1446,7 @@ static int symlink_ext2(fs_node_t * parent, char * target, char * name) {
if (!name) return -EINVAL;
ext2_fs_t * this = parent->device;
if (!(this->flags & EXT2_FLAG_READWRITE)) return -EROFS;
/* first off, check if it exists */
fs_node_t * check = finddir_ext2(parent, name);
@ -1550,8 +1559,8 @@ static int node_from_file(ext2_fs_t * this, ext2_inodetable_t *inode, ext2_dir_t
if ((inode->mode & EXT2_S_IFREG) == EXT2_S_IFREG) {
fnode->flags |= FS_FILE;
fnode->read = read_ext2;
fnode->write = (this->flags & EXT2_FLAG_READWRITE) ? write_ext2 : NULL;
fnode->truncate = (this->flags & EXT2_FLAG_READWRITE) ? truncate_ext2 : NULL;
fnode->write = write_ext2;
fnode->truncate = truncate_ext2;
fnode->create = NULL;
fnode->mkdir = NULL;
fnode->readdir = NULL;
@ -1561,10 +1570,10 @@ static int node_from_file(ext2_fs_t * this, ext2_inodetable_t *inode, ext2_dir_t
}
if ((inode->mode & EXT2_S_IFDIR) == EXT2_S_IFDIR) {
fnode->flags |= FS_DIRECTORY;
fnode->create = (this->flags & EXT2_FLAG_READWRITE) ? create_ext2 : NULL;
fnode->mkdir = (this->flags & EXT2_FLAG_READWRITE) ? mkdir_ext2 : NULL;
fnode->unlink = (this->flags & EXT2_FLAG_READWRITE) ? unlink_ext2 : NULL;
fnode->symlink = (this->flags & EXT2_FLAG_READWRITE) ? symlink_ext2 : NULL;
fnode->create = create_ext2;
fnode->mkdir = mkdir_ext2;
fnode->unlink = unlink_ext2;
fnode->symlink = symlink_ext2;
fnode->readdir = readdir_ext2;
fnode->finddir = finddir_ext2;
fnode->write = NULL;
@ -1594,7 +1603,7 @@ static int node_from_file(ext2_fs_t * this, ext2_inodetable_t *inode, ext2_dir_t
fnode->mtime = inode->mtime;
fnode->ctime = inode->ctime;
fnode->chmod = (this->flags & EXT2_FLAG_READWRITE) ? chmod_ext2 : NULL;
fnode->chmod = chmod_ext2;
fnode->open = open_ext2;
fnode->close = close_ext2;
fnode->ioctl = NULL;