111 lines
2.3 KiB
C
111 lines
2.3 KiB
C
/* VTreeFS - vtreefs.c - initialization and message loop */
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#include "inc.h"
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static unsigned int inodes;
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static struct inode_stat *root_stat;
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static index_t root_entries;
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static size_t buf_size;
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static size_t extra_size;
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/*
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* Initialize internal state. This is the only place where dynamic memory
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* allocation takes place.
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*/
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static int
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init_server(int __unused type, sef_init_info_t * __unused info)
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{
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int r;
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/* Initialize the virtual tree. */
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if ((r = init_inodes(inodes, root_stat, root_entries)) != OK)
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panic("init_inodes failed: %d", r);
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/* Initialize extra data. */
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if ((r = init_extra(inodes, extra_size)) != OK)
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panic("init_extra failed: %d", r);
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/* Initialize the I/O buffer. */
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if ((r = init_buf(buf_size)) != OK)
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panic("init_buf failed: %d", r);
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return OK;
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}
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/*
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* We received a signal.
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*/
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static void
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got_signal(int sig)
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{
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if (sig != SIGTERM)
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return;
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fsdriver_terminate();
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}
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/*
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* SEF initialization.
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*/
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static void
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sef_local_startup(void)
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{
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sef_setcb_init_fresh(init_server);
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sef_setcb_init_restart(SEF_CB_INIT_RESTART_STATEFUL);
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sef_setcb_signal_handler(got_signal);
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sef_startup();
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}
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/*
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* We have received a message that is not a file system request from VFS.
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* Call the message hook, if there is one.
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*/
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void
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fs_other(const message * m_ptr, int ipc_status)
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{
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message msg;
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if (vtreefs_hooks->message_hook != NULL) {
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/*
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* Not all of vtreefs's users play nice with the message, so
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* make a copy to allow it to be modified.
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*/
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msg = *m_ptr;
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vtreefs_hooks->message_hook(&msg, ipc_status);
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}
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}
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/*
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* This is the main routine of this service. It uses the main loop as provided
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* by the fsdriver library. The routine returns once the file system has been
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* unmounted and the process is signaled to exit.
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*/
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void
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run_vtreefs(struct fs_hooks * hooks, unsigned int nr_inodes,
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size_t inode_extra, struct inode_stat * istat,
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index_t nr_indexed_entries, size_t bufsize)
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{
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/*
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* Use global variables to work around the inability to pass parameters
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* through SEF to the initialization function..
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*/
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vtreefs_hooks = hooks;
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inodes = nr_inodes;
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extra_size = inode_extra;
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root_stat = istat;
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root_entries = nr_indexed_entries;
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buf_size = bufsize;
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sef_local_startup();
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fsdriver_task(&vtreefs_table);
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cleanup_buf();
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cleanup_inodes();
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}
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