289 lines
9.2 KiB
C
289 lines
9.2 KiB
C
/* ProcFS - service.c - the service subdirectory */
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#include "inc.h"
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#include <minix/rs.h>
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#include "rs/const.h"
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#include "rs/type.h"
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enum policy {
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POL_NONE = 0x00, /* user | endpoint */
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POL_RESET = 0x01, /* visible | change */
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POL_RESTART = 0x02, /* transparent | preserved */
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POL_LIVE_UPDATE = 0x04 /* transparent | preserved */
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};
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struct policies {
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#define MAX_POL_FORMAT_SZ 20
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char formatted[MAX_POL_FORMAT_SZ];
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enum policy supported;
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};
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static struct rprocpub rprocpub[NR_SYS_PROCS];
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static struct rproc rproc[NR_SYS_PROCS];
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static struct policies policies[NR_SYS_PROCS];
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static struct inode *service_node;
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/* Updates the policies state from RS. Always returns an ASCIIZ string. */
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static const char *
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service_get_policies(struct policies * pol, index_t slot)
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{
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#if 1 /* The following should be retrieved from RS and formated instead. */
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int pos;
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char *ref_label;
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static const struct {
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const char *label;
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const char *policy_str;
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} def_pol[] = {
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/* audio */
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{ .label = "es1370", .policy_str = "reset" },
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{ .label = "es1371", .policy_str = "reset" },
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{ .label = "sb16", .policy_str = "reset" },
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/* bus */
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{ .label = "i2c", .policy_str = "restart" },
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{ .label = "pci", .policy_str = "restart" },
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{ .label = "ti1225", .policy_str = "restart" },
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/* clock */
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{ .label = "readclock.drv", .policy_str = "restart" },
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/* eeprom */
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{ .label = "cat24c256", .policy_str = "restart" },
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/* examples */
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{ .label = "hello", .policy_str = "restart" },
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/* hid */
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{ .label = "pckbd", .policy_str = "reset" },
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/* iommu */
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{ .label = "amddev", .policy_str = "" },
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/* net */
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{ .label = "3c90x", .policy_str = "restart" },
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{ .label = "atl2", .policy_str = "restart" },
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{ .label = "dec21140A", .policy_str = "restart" },
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{ .label = "dp8390", .policy_str = "restart" },
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{ .label = "dpeth", .policy_str = "restart" },
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{ .label = "e1000", .policy_str = "restart" },
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{ .label = "fxp", .policy_str = "restart" },
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{ .label = "lance", .policy_str = "restart" },
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{ .label = "lan8710a", .policy_str = "restart" },
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{ .label = "orinoco", .policy_str = "restart" },
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{ .label = "rtl8139", .policy_str = "restart" },
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{ .label = "rtl8169", .policy_str = "restart" },
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{ .label = "uds", .policy_str = "reset" },
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{ .label = "virtio_net", .policy_str = "restart" },
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/* power */
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{ .label = "acpi", .policy_str = "" },
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{ .label = "tps65217", .policy_str = "" },
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{ .label = "tps65590", .policy_str = "" },
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/* printer */
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{ .label = "printer", .policy_str = "restart" },
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/* sensors */
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{ .label = "bmp085", .policy_str = "" },
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{ .label = "sht21", .policy_str = "restart" },
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{ .label = "tsl2550", .policy_str = "restart" },
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/* storage */
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{ .label = "ahci", .policy_str = "reset" },
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{ .label = "at_wini", .policy_str = "reset" },
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{ .label = "fbd", .policy_str = "reset" },
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{ .label = "filter", .policy_str = "reset" },
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{ .label = "floppy", .policy_str = "reset" },
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{ .label = "memory", .policy_str = "restart" },
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{ .label = "mmc", .policy_str = "reset" },
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{ .label = "virtio_blk", .policy_str = "reset" },
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{ .label = "vnd", .policy_str = "reset" },
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/* system */
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{ .label = "gpio", .policy_str = "restart" },
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{ .label = "log", .policy_str = "restart" },
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{ .label = "random", .policy_str = "restart" },
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/* tty */
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{ .label = "pty", .policy_str = "restart" },
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{ .label = "tty", .policy_str = "" },
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/* usb */
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{ .label = "usbd", .policy_str = "" },
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{ .label = "usb_hub", .policy_str = "" },
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{ .label = "usb_storage", .policy_str = "" },
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/* video */
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{ .label = "fb", .policy_str = "" },
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{ .label = "tda19988", .policy_str = "" },
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/* vmm_guest */
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{ .label = "vbox", .policy_str = "" },
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/* fs */
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{ .label = "ext2", .policy_str = "" },
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{ .label = "hgfs", .policy_str = "" },
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{ .label = "isofs", .policy_str = "" },
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{ .label = "mfs", .policy_str = "" },
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{ .label = "pfs", .policy_str = "" },
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{ .label = "procfs", .policy_str = "" },
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{ .label = "ptyfs", .policy_str = "" },
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{ .label = "vbfs", .policy_str = "" },
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/* net */
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{ .label = "inet", .policy_str = "reset" },
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{ .label = "lwip", .policy_str = "" },
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/* servers */
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{ .label = "devman", .policy_str = "" },
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{ .label = "ds", .policy_str = "" },
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{ .label = "input", .policy_str = "reset" },
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{ .label = "ipc", .policy_str = "restart" },
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{ .label = "is", .policy_str = "restart" },
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{ .label = "pm", .policy_str = "" },
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{ .label = "rs", .policy_str = "" },
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{ .label = "sched", .policy_str = "" },
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{ .label = "vfs", .policy_str = "" },
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{ .label = "vm", .policy_str = "" },
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//{ .label = "", .policy_str = "" },
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};
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/* Find the related policy, based on the file name of the service. */
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ref_label = strrchr(rprocpub[slot].proc_name, '/');
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if (NULL == ref_label)
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ref_label = rprocpub[slot].proc_name;
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memset(pol[slot].formatted, 0, MAX_POL_FORMAT_SZ);
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for(pos = 0; pos < (sizeof(def_pol) / sizeof(def_pol[0])); pos++) {
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if (0 == strcmp(ref_label, def_pol[pos].label)) {
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(void)strncpy(pol[slot].formatted, def_pol[pos].policy_str, MAX_POL_FORMAT_SZ);
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pol[slot].formatted[MAX_POL_FORMAT_SZ-1] = '\0';
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break;
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}
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}
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#else
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/* Should do something sensible, based on flags from RS/SEF. */
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#endif
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return pol[slot].formatted;
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}
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/*
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* Update the contents of the service directory, by first updating the RS
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* tables and then updating the directory contents.
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*/
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static void
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service_update(void)
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{
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struct inode *node;
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struct inode_stat stat;
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index_t slot;
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/* There is not much we can do if either of these calls fails. */
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(void)getsysinfo(RS_PROC_NR, SI_PROCPUB_TAB, rprocpub,
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sizeof(rprocpub));
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(void)getsysinfo(RS_PROC_NR, SI_PROC_TAB, rproc, sizeof(rproc));
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/*
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* As with PIDs, we make two passes. Delete first, then add. This
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* prevents problems in the hypothetical case that between updates, one
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* slot ends up with the label name of a previous, different slot.
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*/
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for (slot = 0; slot < NR_SYS_PROCS; slot++) {
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if ((node = get_inode_by_index(service_node, slot)) == NULL)
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continue;
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/*
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* If the slot is no longer in use, or the label name does not
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* match, the node must be deleted.
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*/
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if (!(rproc[slot].r_flags & RS_IN_USE) ||
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strcmp(get_inode_name(node), rprocpub[slot].label))
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delete_inode(node);
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}
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memset(&stat, 0, sizeof(stat));
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stat.mode = REG_ALL_MODE;
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stat.uid = SUPER_USER;
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stat.gid = SUPER_USER;
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for (slot = 0; slot < NR_SYS_PROCS; slot++) {
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if (!(rproc[slot].r_flags & RS_IN_USE) ||
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get_inode_by_index(service_node, slot) != NULL)
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continue;
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node = add_inode(service_node, rprocpub[slot].label, slot,
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&stat, (index_t)0, (cbdata_t)slot);
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if (node == NULL)
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out_of_inodes();
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}
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}
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/*
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* Initialize the service directory.
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*/
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void
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service_init(void)
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{
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struct inode *root, *node;
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struct inode_stat stat;
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root = get_root_inode();
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memset(&stat, 0, sizeof(stat));
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stat.mode = DIR_ALL_MODE;
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stat.uid = SUPER_USER;
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stat.gid = SUPER_USER;
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service_node = add_inode(root, "service", NO_INDEX, &stat,
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NR_SYS_PROCS, NULL);
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if (service_node == NULL)
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panic("unable to create service node");
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}
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/*
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* A lookup request is being performed. If it is in the service directory,
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* update the tables. We do this lazily, to reduce overhead.
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*/
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void
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service_lookup(struct inode * parent, clock_t now)
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{
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static clock_t last_update = 0;
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if (parent != service_node)
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return;
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if (last_update != now) {
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service_update();
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last_update = now;
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}
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}
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/*
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* A getdents request is being performed. If it is in the service directory,
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* update the tables.
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*/
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void
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service_getdents(struct inode * node)
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{
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if (node != service_node)
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return;
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service_update();
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}
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/*
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* A read request is being performed. If it is on a file in the service
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* directory, process the read request. We rely on the fact that any read
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* call will have been preceded by a lookup, so its table entry has been
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* updated very recently.
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*/
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void
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service_read(struct inode * node)
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{
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struct inode *parent;
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index_t slot;
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struct rprocpub *rpub;
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struct rproc *rp;
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if (get_parent_inode(node) != service_node)
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return;
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slot = get_inode_index(node);
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rpub = &rprocpub[slot];
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rp = &rproc[slot];
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/* TODO: add a large number of other fields! */
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buf_printf("filename: %s\n", rpub->proc_name);
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buf_printf("endpoint: %d\n", rpub->endpoint);
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buf_printf("restarts: %d\n", rp->r_restarts);
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buf_printf("policies: %s\n", service_get_policies(policies, slot));
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}
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