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/* ProcFS - main.c - main functions of the process file system */
#include "inc.h"
static void init_hook(void);
/* The hook functions that will be called by VTreeFS. */
static struct fs_hooks hooks = {
.init_hook = init_hook,
.lookup_hook = lookup_hook,
.getdents_hook = getdents_hook,
.read_hook = read_hook,
.rdlink_hook = rdlink_hook,
};
/*
* Construct a tree of static files from a null-terminated array of file
* structures, recursively creating directories which have their associated
* data point to child file structures.
*/
static void
construct_tree(struct inode * dir, struct file * files)
{
struct file *file;
struct inode *node;
struct inode_stat stat;
stat.uid = SUPER_USER;
stat.gid = SUPER_USER;
stat.size = 0;
stat.dev = NO_DEV;
for (file = files; file->name != NULL; file++) {
stat.mode = file->mode;
node = add_inode(dir, file->name, NO_INDEX, &stat, (index_t)0,
(cbdata_t)file->data);
assert(node != NULL);
if (S_ISDIR(file->mode))
construct_tree(node, (struct file *)file->data);
}
}
/*
* Initialization hook. Generate the static part of the tree.
*/
static void
init_hook(void)
{
static int first_time = TRUE;
struct inode *root;
int r;
if (first_time) {
/*
* Initialize some state. If we are incompatible with the kernel,
* exit immediately.
*/
if ((r = init_tree()) != OK)
panic("init_tree failed!");
root = get_root_inode();
construct_tree(root, root_files);
service_init();
first_time = FALSE;
}
}
/*
* ProcFS entry point.
*/
int main(void)
{
static struct inode_stat stat;
/* Properties of the root directory. */
stat.mode = DIR_ALL_MODE;
stat.uid = SUPER_USER;
stat.gid = SUPER_USER;
stat.size = 0;
stat.dev = NO_DEV;
/* Run VTreeFS. */
run_vtreefs(&hooks, NR_INODES, 0, &stat, NR_PROCS + NR_TASKS,
BUF_SIZE);
return 0;
}
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