2 * linux/kernel/vserver/proc.c
4 * Virtual Context Support
6 * Copyright (C) 2003-2005 Herbert Pƶtzl
8 * V0.01 basic structure
9 * V0.02 adaptation vs1.3.0
10 * V0.03 proc permissions
11 * V0.04 locking/generic
12 * V0.05 next generation procfs
13 * V0.06 inode validation
14 * V0.07 generic rewrite vid
18 #include <linux/config.h>
19 #include <linux/errno.h>
20 #include <linux/proc_fs.h>
21 #include <linux/sched.h>
22 #include <linux/vs_context.h>
23 #include <linux/vs_network.h>
24 #include <linux/vs_cvirt.h>
26 #include <linux/vserver/switch.h>
28 #include <asm/uaccess.h>
29 #include <asm/unistd.h>
31 #include "cvirt_proc.h"
32 #include "limit_proc.h"
33 #include "sched_proc.h"
34 #include "vci_config.h"
36 static struct proc_dir_entry *proc_virtual;
38 static struct proc_dir_entry *proc_vnet;
41 enum vid_directory_inos {
55 #define PROC_VID_MASK 0x60
58 /* first the actual feeds */
61 static int proc_virtual_info(int vid, char *buffer)
63 return sprintf(buffer,
64 "VCIVersion:\t%04x:%04x\n"
75 int proc_xid_info (int vid, char *buffer)
80 vxi = locate_vx_info(vid);
83 length = sprintf(buffer,
95 int proc_xid_status (int vid, char *buffer)
100 vxi = locate_vx_info(vid);
103 length = sprintf(buffer,
110 ,atomic_read(&vxi->vx_usecnt)
111 ,atomic_read(&vxi->vx_tasks)
112 ,(unsigned long long)vxi->vx_flags
113 ,(unsigned long long)vxi->vx_bcaps
114 ,(unsigned long long)vxi->vx_ccaps
115 ,atomic_read(&vxi->limit.ticks)
121 int proc_xid_limit (int vid, char *buffer)
126 vxi = locate_vx_info(vid);
129 length = vx_info_proc_limit(&vxi->limit, buffer);
134 int proc_xid_sched (int vid, char *buffer)
139 vxi = locate_vx_info(vid);
142 length = vx_info_proc_sched(&vxi->sched, buffer);
147 int proc_xid_cvirt (int vid, char *buffer)
152 vxi = locate_vx_info(vid);
156 length = vx_info_proc_cvirt(&vxi->cvirt, buffer);
161 int proc_xid_cacct (int vid, char *buffer)
166 vxi = locate_vx_info(vid);
169 length = vx_info_proc_cacct(&vxi->cacct, buffer);
175 static int proc_vnet_info(int vid, char *buffer)
177 return sprintf(buffer,
178 "VCIVersion:\t%04x:%04x\n"
181 ,VCI_VERSION & 0xFFFF
187 (((a)>>0) & 0xff), (((a)>>8) & 0xff), \
188 (((a)>>16) & 0xff), (((a)>>24) & 0xff)
190 int proc_nid_info (int vid, char *buffer)
195 nxi = locate_nx_info(vid);
198 length = sprintf(buffer,
204 for (i=0; i<nxi->nbipv4; i++) {
205 length += sprintf(buffer + length,
206 "%d:\t%d.%d.%d.%d/%d.%d.%d.%d\n", i,
207 atoquad(nxi->ipv4[i]),
208 atoquad(nxi->mask[i]));
214 int proc_nid_status (int vid, char *buffer)
219 nxi = locate_nx_info(vid);
222 length = sprintf(buffer,
225 ,atomic_read(&nxi->nx_usecnt)
226 ,atomic_read(&nxi->nx_refcnt)
232 /* here the inode helpers */
235 #define fake_ino(id,nr) (((nr) & 0xFFFF) | \
236 (((id) & 0xFFFF) << 16))
238 #define inode_vid(i) (((i)->i_ino >> 16) & 0xFFFF)
239 #define inode_type(i) ((i)->i_ino & 0xFFFF)
241 #define MAX_MULBY10 ((~0U-9)/10)
244 static struct inode *proc_vid_make_inode(struct super_block * sb,
247 struct inode *inode = new_inode(sb);
252 inode->i_mtime = inode->i_atime =
253 inode->i_ctime = CURRENT_TIME;
254 inode->i_ino = fake_ino(vid, ino);
258 // inode->i_xid = xid;
263 static int proc_vid_revalidate(struct dentry * dentry, struct nameidata *nd)
265 struct inode * inode = dentry->d_inode;
268 vid = inode_vid(inode);
269 switch (inode_type(inode) & PROC_VID_MASK) {
271 hashed = xid_is_hashed(vid);
274 hashed = nid_is_hashed(vid);
284 static int proc_vid_delete_dentry(struct dentry * dentry)
291 #define PROC_BLOCK_SIZE (PAGE_SIZE - 1024)
293 static ssize_t proc_vid_info_read(struct file * file, char * buf,
294 size_t count, loff_t *ppos)
296 struct inode * inode = file->f_dentry->d_inode;
301 if (count > PROC_BLOCK_SIZE)
302 count = PROC_BLOCK_SIZE;
303 if (!(page = __get_free_page(GFP_KERNEL)))
306 vid = inode_vid(inode);
307 length = PROC_I(inode)->op.proc_vid_read(vid, (char*)page);
310 length = simple_read_from_buffer(buf, count, ppos,
311 (char *)page, length);
320 /* here comes the lower level (vid) */
322 static struct file_operations proc_vid_info_file_operations = {
323 read: proc_vid_info_read,
326 static struct dentry_operations proc_vid_dentry_operations = {
327 d_revalidate: proc_vid_revalidate,
328 // d_delete: proc_vid_delete_dentry,
339 #define E(type,name,mode) {(type),sizeof(name)-1,(name),(mode)}
341 static struct vid_entry vx_base_stuff[] = {
342 E(PROC_XID_INFO, "info", S_IFREG|S_IRUGO),
343 E(PROC_XID_STATUS, "status", S_IFREG|S_IRUGO),
344 E(PROC_XID_LIMIT, "limit", S_IFREG|S_IRUGO),
345 E(PROC_XID_SCHED, "sched", S_IFREG|S_IRUGO),
346 E(PROC_XID_CVIRT, "cvirt", S_IFREG|S_IRUGO),
347 E(PROC_XID_CACCT, "cacct", S_IFREG|S_IRUGO),
351 static struct vid_entry vn_base_stuff[] = {
352 E(PROC_NID_INFO, "info", S_IFREG|S_IRUGO),
353 E(PROC_NID_STATUS, "status", S_IFREG|S_IRUGO),
359 static struct dentry *proc_vid_lookup(struct inode *dir,
360 struct dentry *dentry, struct nameidata *nd)
369 switch (inode_type(dir)) {
380 for (; p->name; p++) {
381 if (p->len != dentry->d_name.len)
383 if (!memcmp(dentry->d_name.name, p->name, p->len))
390 inode = proc_vid_make_inode(dir->i_sb, inode_vid(dir), p->type);
396 PROC_I(inode)->op.proc_vid_read = proc_xid_info;
398 case PROC_XID_STATUS:
399 PROC_I(inode)->op.proc_vid_read = proc_xid_status;
402 PROC_I(inode)->op.proc_vid_read = proc_xid_limit;
405 PROC_I(inode)->op.proc_vid_read = proc_xid_sched;
408 PROC_I(inode)->op.proc_vid_read = proc_xid_cvirt;
411 PROC_I(inode)->op.proc_vid_read = proc_xid_cacct;
415 PROC_I(inode)->op.proc_vid_read = proc_nid_info;
417 case PROC_NID_STATUS:
418 PROC_I(inode)->op.proc_vid_read = proc_nid_status;
422 printk("procfs: impossible type (%d)",p->type);
424 return ERR_PTR(-EINVAL);
426 inode->i_mode = p->mode;
427 // inode->i_op = &proc_vid_info_inode_operations;
428 inode->i_fop = &proc_vid_info_file_operations;
430 inode->i_flags|=S_IMMUTABLE;
432 dentry->d_op = &proc_vid_dentry_operations;
433 d_add(dentry, inode);
436 return ERR_PTR(error);
440 static int proc_vid_readdir(struct file * filp,
441 void * dirent, filldir_t filldir)
444 struct inode *inode = filp->f_dentry->d_inode;
450 if (filldir(dirent, ".", 1, i,
451 inode->i_ino, DT_DIR) < 0)
457 if (filldir(dirent, "..", 2, i,
458 PROC_ROOT_INO, DT_DIR) < 0)
465 switch (inode_type(inode)) {
467 size = sizeof(vx_base_stuff);
468 p = vx_base_stuff + i;
471 size = sizeof(vn_base_stuff);
472 p = vn_base_stuff + i;
477 if (i >= size/sizeof(struct vid_entry))
480 if (filldir(dirent, p->name, p->len,
481 filp->f_pos, fake_ino(inode_vid(inode),
482 p->type), p->mode >> 12) < 0)
494 /* now the upper level (virtual) */
496 static struct file_operations proc_vid_file_operations = {
497 read: generic_read_dir,
498 readdir: proc_vid_readdir,
501 static struct inode_operations proc_vid_inode_operations = {
502 lookup: proc_vid_lookup,
507 static __inline__ int atovid(const char *str, int len)
517 if (vid >= MAX_MULBY10)
528 struct dentry *proc_virtual_lookup(struct inode *dir,
529 struct dentry * dentry, struct nameidata *nd)
536 name = dentry->d_name.name;
537 len = dentry->d_name.len;
540 if (len == 7 && !memcmp(name, "current", 7)) {
541 inode = new_inode(dir->i_sb);
544 inode->i_mtime = inode->i_atime =
545 inode->i_ctime = CURRENT_TIME;
546 inode->i_ino = fake_ino(1, PROC_XID_INO);
547 inode->i_mode = S_IFLNK|S_IRWXUGO;
548 inode->i_uid = inode->i_gid = 0;
550 // inode->i_op = &proc_current_inode_operations;
551 d_add(dentry, inode);
554 if (len == 4 && !memcmp(name, "info", 4)) {
555 inode = proc_vid_make_inode(dir->i_sb, 0, PROC_XID_INFO);
558 inode->i_fop = &proc_vid_info_file_operations;
559 PROC_I(inode)->op.proc_vid_read = proc_virtual_info;
560 inode->i_mode = S_IFREG|S_IRUGO;
561 // inode->i_size = 64;
562 // inode->i_op = &proc_current_inode_operations;
563 d_add(dentry, inode);
568 xid = atovid(name, len);
571 vxi = locate_vx_info(xid);
576 if (vx_check(xid, VX_ADMIN|VX_WATCH|VX_IDENT))
577 inode = proc_vid_make_inode(dir->i_sb,
578 vxi->vx_id, PROC_XID_INO);
582 inode->i_mode = S_IFDIR|S_IRUGO;
583 inode->i_op = &proc_vid_inode_operations;
584 inode->i_fop = &proc_vid_file_operations;
586 inode->i_flags|=S_IMMUTABLE;
588 dentry->d_op = &proc_vid_dentry_operations;
589 d_add(dentry, inode);
599 struct dentry *proc_vnet_lookup(struct inode *dir,
600 struct dentry * dentry, struct nameidata *nd)
607 name = dentry->d_name.name;
608 len = dentry->d_name.len;
610 if (len == 7 && !memcmp(name, "current", 7)) {
611 inode = new_inode(dir->i_sb);
614 inode->i_mtime = inode->i_atime =
615 inode->i_ctime = CURRENT_TIME;
616 inode->i_ino = fake_ino(1, PROC_NID_INO);
617 inode->i_mode = S_IFLNK|S_IRWXUGO;
618 inode->i_uid = inode->i_gid = 0;
620 // inode->i_op = &proc_current_inode_operations;
621 d_add(dentry, inode);
624 if (len == 4 && !memcmp(name, "info", 4)) {
625 inode = proc_vid_make_inode(dir->i_sb, 0, PROC_NID_INFO);
628 inode->i_fop = &proc_vid_info_file_operations;
629 PROC_I(inode)->op.proc_vid_read = proc_vnet_info;
630 inode->i_mode = S_IFREG|S_IRUGO;
631 // inode->i_size = 64;
632 // inode->i_op = &proc_current_inode_operations;
633 d_add(dentry, inode);
638 nid = atovid(name, len);
641 nxi = locate_nx_info(nid);
647 inode = proc_vid_make_inode(dir->i_sb,
648 nxi->nx_id, PROC_NID_INO);
652 inode->i_mode = S_IFDIR|S_IRUGO;
653 inode->i_op = &proc_vid_inode_operations;
654 inode->i_fop = &proc_vid_file_operations;
656 inode->i_flags|=S_IMMUTABLE;
658 dentry->d_op = &proc_vid_dentry_operations;
659 d_add(dentry, inode);
671 #define PROC_NUMBUF 10
672 #define PROC_MAXVIDS 32
674 int proc_virtual_readdir(struct file * filp,
675 void * dirent, filldir_t filldir)
677 unsigned int xid_array[PROC_MAXVIDS];
678 char buf[PROC_NUMBUF];
679 unsigned int nr = filp->f_pos-3;
680 unsigned int nr_xids, i;
683 switch ((long)filp->f_pos) {
685 ino = fake_ino(0, PROC_XID_INO);
686 if (filldir(dirent, ".", 1,
687 filp->f_pos, ino, DT_DIR) < 0)
692 ino = filp->f_dentry->d_parent->d_inode->i_ino;
693 if (filldir(dirent, "..", 2,
694 filp->f_pos, ino, DT_DIR) < 0)
699 ino = fake_ino(0, PROC_XID_INFO);
700 if (filldir(dirent, "info", 4,
701 filp->f_pos, ino, DT_LNK) < 0)
706 if (vx_current_xid() > 1) {
707 ino = fake_ino(1, PROC_XID_INO);
708 if (filldir(dirent, "current", 7,
709 filp->f_pos, ino, DT_LNK) < 0)
715 nr_xids = get_xid_list(nr, xid_array, PROC_MAXVIDS);
716 for (i = 0; i < nr_xids; i++) {
717 int xid = xid_array[i];
718 ino_t ino = fake_ino(xid, PROC_XID_INO);
719 unsigned int j = PROC_NUMBUF;
721 do buf[--j] = '0' + (xid % 10); while (xid/=10);
723 if (filldir(dirent, buf+j, PROC_NUMBUF-j,
724 filp->f_pos, ino, DT_DIR) < 0)
732 static struct file_operations proc_virtual_dir_operations = {
733 read: generic_read_dir,
734 readdir: proc_virtual_readdir,
737 static struct inode_operations proc_virtual_dir_inode_operations = {
738 lookup: proc_virtual_lookup,
742 int proc_vnet_readdir(struct file * filp,
743 void * dirent, filldir_t filldir)
745 unsigned int nid_array[PROC_MAXVIDS];
746 char buf[PROC_NUMBUF];
747 unsigned int nr = filp->f_pos-3;
748 unsigned int nr_nids, i;
751 switch ((long)filp->f_pos) {
753 ino = fake_ino(0, PROC_NID_INO);
754 if (filldir(dirent, ".", 1,
755 filp->f_pos, ino, DT_DIR) < 0)
760 ino = filp->f_dentry->d_parent->d_inode->i_ino;
761 if (filldir(dirent, "..", 2,
762 filp->f_pos, ino, DT_DIR) < 0)
767 ino = fake_ino(0, PROC_NID_INFO);
768 if (filldir(dirent, "info", 4,
769 filp->f_pos, ino, DT_LNK) < 0)
774 if (vx_current_xid() > 1) {
775 ino = fake_ino(1, PROC_NID_INO);
776 if (filldir(dirent, "current", 7,
777 filp->f_pos, ino, DT_LNK) < 0)
783 nr_nids = get_nid_list(nr, nid_array, PROC_MAXVIDS);
784 for (i = 0; i < nr_nids; i++) {
785 int nid = nid_array[i];
786 ino_t ino = fake_ino(nid, PROC_NID_INO);
787 unsigned long j = PROC_NUMBUF;
789 do buf[--j] = '0' + (nid % 10); while (nid/=10);
791 if (filldir(dirent, buf+j, PROC_NUMBUF-j,
792 filp->f_pos, ino, DT_DIR) < 0)
800 static struct file_operations proc_vnet_dir_operations = {
801 read: generic_read_dir,
802 readdir: proc_vnet_readdir,
805 static struct inode_operations proc_vnet_dir_inode_operations = {
806 lookup: proc_vnet_lookup,
811 void proc_vx_init(void)
813 struct proc_dir_entry *ent;
815 ent = proc_mkdir("virtual", 0);
817 ent->proc_fops = &proc_virtual_dir_operations;
818 ent->proc_iops = &proc_virtual_dir_inode_operations;
822 ent = proc_mkdir("virtnet", 0);
824 ent->proc_fops = &proc_vnet_dir_operations;
825 ent->proc_iops = &proc_vnet_dir_inode_operations;
836 int proc_pid_vx_info(struct task_struct *p, char *buffer)
839 char * orig = buffer;
841 buffer += sprintf (buffer,"XID:\t%d\n", vx_task_xid(p));
842 vxi = task_get_vx_info(p);
843 if (vxi && !vx_flags(VXF_INFO_HIDE, 0)) {
844 buffer += sprintf (buffer,"BCaps:\t%016llx\n"
845 ,(unsigned long long)vxi->vx_bcaps);
846 buffer += sprintf (buffer,"CCaps:\t%016llx\n"
847 ,(unsigned long long)vxi->vx_ccaps);
848 buffer += sprintf (buffer,"CFlags:\t%016llx\n"
849 ,(unsigned long long)vxi->vx_flags);
850 buffer += sprintf (buffer,"CIPid:\t%d\n"
854 return buffer - orig;
858 int proc_pid_nx_info(struct task_struct *p, char *buffer)
861 char * orig = buffer;
863 buffer += sprintf (buffer,"NID:\t%d\n", nx_task_nid(p));
864 nxi = task_get_nx_info(p);
865 if (nxi && !vx_flags(VXF_INFO_HIDE, 0)) {
868 for (i=0; i<nxi->nbipv4; i++){
869 buffer += sprintf (buffer,
870 "V4Root[%d]:\t%d.%d.%d.%d/%d.%d.%d.%d\n", i
871 ,NIPQUAD(nxi->ipv4[i])
872 ,NIPQUAD(nxi->mask[i]));
874 buffer += sprintf (buffer,
875 "V4Root[bcast]:\t%d.%d.%d.%d\n"
876 ,NIPQUAD(nxi->v4_bcast));
879 return buffer - orig;