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76714993c6
freebsd-nq/sys/dev/vinum/vinumconfig.c
Greg Lehey 76714993c6 Include Peter Wemm's renaming and restructuring 
Change from lkm to kld

Remove BROKEN_GDB kludge (it's not needed with klds)

Add code for interfacing with daemon

Modify device minor number encoding, use selector functions which also
permit anonymous plexes and subdisks.

Remove code for 2.x support.

Change messages to omit obvious words like 'plex' and 'subdisk.

give_plex_to_volume: invalidate subdisks being given to a plex which
is part of a volume with other plexes.

give_sd_to_plex: keep track of plex size in all cases

lock drives before closing them, to keep the daemon from getting
confused.

config_drive: handle partition type errors more gracefully

config_subdisk: set subdisk state correctly

find_drive, find_drive_by_dev, find_subdisk, find_plex, find_volume:
  set VF_NEWBORN flag when a new object is created

config_drive:
  Handle partition_status returns more cleverly.
  Replace the device name in some cases where it got overwritten.

config_subdisk:
  add parameter `update'.  If the object already exists, exit without
  any changes.
  Set state correctly.

config_plex, config_volume:
  add parameter `update'.  If the object already exists, exit without
  any changes.

parse_config:
  move read function to vinum_scandisk.
  add parameter `update' to pass to config_<object>.

remove_<object>_entry:
  print a message when the object is removed.

update_plex_config:
  Start defusing this function, which will go away some time.
  Remove calls to update_volume_config.
  Make size 64 bits
1999-01-21 00:32:54 +00:00

1731 lines
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/* To do:
* Don't store drive configuration on the config DB: read each drive's header
* to decide where it is.
*
* Accept any old crap in the config_<foo> functions, and complain when
* we try to bring it up.
*
* When trying to bring volumes up, check that the complete address range
* is covered.
*/
/*-
* Copyright (c) 1997, 1998
* Nan Yang Computer Services Limited. All rights reserved.
*
* This software is distributed under the so-called ``Berkeley
* License'':
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Nan Yang Computer
* Services Limited.
* 4. Neither the name of the Company nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* This software is provided ``as is'', and any express or implied
* warranties, including, but not limited to, the implied warranties of
* merchantability and fitness for a particular purpose are disclaimed.
* In no event shall the company or contributors be liable for any
* direct, indirect, incidental, special, exemplary, or consequential
* damages (including, but not limited to, procurement of substitute
* goods or services; loss of use, data, or profits; or business
* interruption) however caused and on any theory of liability, whether
* in contract, strict liability, or tort (including negligence or
* otherwise) arising in any way out of the use of this software, even if
* advised of the possibility of such damage.
*
* $Id: vinumconfig.c,v 1.22 1998/12/30 05:07:24 grog Exp grog $
*/
#define STATIC /* nothing while we're testing XXX */
#define REALLYKERNEL
#include "opt_vinum.h"
#include <dev/vinum/vinumhdr.h>
extern jmp_buf command_fail; /* return on a failed command */
/* Why aren't these declared anywhere? XXX */
void longjmp(jmp_buf, int);
#define MAXTOKEN 64 /* maximum number of tokens in a line */
/* We can afford the luxury of global variables here,
* since start_config ensures that these functions
* are single-threaded. */
/* These are indices in vinum_conf of the last-mentioned of each kind of object */
static int current_drive = -1; /* note the last drive we mention, for
* some defaults */
static int current_plex = -1; /* and the same for the last plex */
static int current_volume = -1; /* and the last volme */
static struct _ioctl_reply *ioctl_reply; /* struct to return via ioctl */
/* These values are used by most of these routines, so set them as globals */
static char *token[MAXTOKEN]; /* pointers to individual tokens */
static int tokens; /* number of tokens */
#define TOCONS 0x01
#define TOTTY 0x02
#define TOLOG 0x04
struct putchar_arg {
int flags;
struct tty *tty;
};
#define MSG_MAX 1024 /* maximum length of a formatted message */
/* Format an error message and return to the user in the reply.
* CARE: This routine is designed to be called only from the
* configuration routines, so it assumes it's the owner of
* the configuration lock, and unlocks it on exit */
void
throw_rude_remark(int error, char *msg,...)
{
int retval;
va_list ap;
char *text;
static int finishing; /* don't recurse */
int was_finishing;
va_start(ap, msg);
if ((ioctl_reply != NULL) /* we're called from the user */
&&(!(vinum_conf.flags & VF_KERNELOP))) { /* and we're not doing kernel things: return msg */
/* XXX We can't just format to ioctl_reply, since it
* may contain our input parameters */
text = Malloc(MSG_MAX);
if (text == NULL) {
printf("vinum: can't allocate error message buffer");
printf("vinum: ");
vprintf(msg, ap); /* print to the console */
printf("\n");
} else {
retval = kvprintf(msg, NULL, (void *) text, 10, ap);
text[retval] = '\0'; /* delimit */
strcpy(ioctl_reply->msg, text);
ioctl_reply->error = error; /* first byte is the error number */
Free(text);
}
} else {
printf("vinum: ");
vprintf(msg, ap); /* print to the console */
printf("\n");
}
va_end(ap);
if (vinum_conf.flags & VF_READING_CONFIG) /* go through to the bitter end, */
return;
/* We have a problem here: we want to unlock the
* configuration, which implies tidying up, but
* if we find an error while tidying up, we could
* recurse for ever. Use this kludge to only try
* once */
was_finishing = finishing;
finishing = 1;
finish_config(was_finishing); /* unlock anything we may be holding */
finishing = was_finishing;
longjmp(command_fail, error);
}
/* Function declarations */
int atoi(char *); /* no atoi in the kernel */
/* Minimal version of atoi */
int
atoi(char *s)
{ /* no atoi in the kernel */
int r = 0;
int sign = 1;
while (((*s >= '0') && (*s <= '9')) || (*s == '-')) {
if (*s == '-')
sign = -sign;
else
r = r * 10 + (*s - '0');
}
return r;
}
/* Find index of volume in vinum_conf. Return the index
* if found, or -1 if not */
int
volume_index(struct volume *vol)
{
int i;
for (i = 0; i < vinum_conf.volumes_used; i++)
if (&VOL[i] == vol)
return i;
return -1;
}
/* Find index of plex in vinum_conf. Return the index
* if found, or -1 if not */
int
plex_index(struct plex *plex)
{
int i;
for (i = 0; i < vinum_conf.plexes_used; i++)
if (&PLEX[i] == plex)
return i;
return -1;
}
/* Find index of subdisk in vinum_conf. Return the index
* if found, or -1 if not */
int
sd_index(struct sd *sd)
{
int i;
for (i = 0; i < vinum_conf.subdisks_used; i++)
if (&SD[i] == sd)
return i;
return -1;
}
/* Find index of drive in vinum_conf. Return the index
* if found, or -1 if not */
int
drive_index(struct drive *drive)
{
int i;
for (i = 0; i < vinum_conf.drives_used; i++)
if (&DRIVE[i] == drive)
return i;
return -1;
}
/* Check a volume to see if the plex is already assigned to it.
* Return index in volume->plex, or -1 if not assigned */
int
my_plex(int volno, int plexno)
{
int i;
struct volume *vol;
vol = &VOL[volno]; /* point to volno */
for (i = 0; i < vol->plexes; i++)
if (vol->plex[i] == plexno)
return i;
return -1; /* not found */
}
/* Check a plex to see if the subdisk is already assigned to it.
* Return index in plex->sd, or -1 if not assigned */
int
my_sd(int plexno, int sdno)
{
int i;
struct plex *plex;
plex = &PLEX[plexno];
for (i = 0; i < plex->subdisks; i++)
if (plex->sdnos[i] == sdno)
return i;
return -1; /* not found */
}
/* Check that this operation is being done in the kernel.
* longjmp out if not. op the name of the operation. */
void
checkkernel(char *op)
{
if (vinum_conf.flags & VF_KERNELOP == 0)
throw_rude_remark(EPERM, "Can't perform '%s' from user space", op);
}
/* Add plex to the volume if possible */
int
give_plex_to_volume(int volno, int plexno)
{
struct volume *vol;
/* XXX It's not an error for the plex to already
* belong to the volume, but we need to check a
* number of things to make sure it's done right.
* Some day. */
if (my_plex(volno, plexno) >= 0)
return plexno; /* that's it */
vol = &VOL[volno]; /* point to volume */
if (vol->plexes == MAXPLEX) /* all plexes allocated */
throw_rude_remark(ENOSPC,
"Too many plexes for volume %s",
vol->name);
else if ((vol->plexes > 0) /* we have other plexes */
&&(vol->flags & VF_CONFIG_SETUPSTATE == 0)) /* and we're not setting up state */
invalidate_subdisks(&PLEX[plexno], sd_stale); /* make the subdisks invalid */
vol->plex[vol->plexes] = plexno; /* this one */
vol->plexes++; /* add another plex */
PLEX[plexno].volno = volno; /* note the number of our volume */
return vol->plexes - 1; /* and return its index */
}
/* Add subdisk to a plex if possible */
int
give_sd_to_plex(int plexno, int sdno)
{
int i;
struct plex *plex;
struct sd *sd;
/* XXX It's not an error for the sd to already
* belong to the plex, but we need to check a
* number of things to make sure it's done right.
* Some day. */
i = my_sd(plexno, sdno);
if (i >= 0) /* does it already belong to us? */
return i; /* that's it */
plex = &PLEX[plexno]; /* point to the plex */
sd = &SD[sdno]; /* and the subdisk */
/* Do we have an offset? Otherwise put it after the last one */
if (sd->plexoffset < 0) { /* no offset specified */
if (plex->subdisks > 0) {
struct sd *lastsd = &SD[plex->sdnos[plex->subdisks - 1]]; /* last subdisk */
if (plex->organization == plex_concat) /* concat, */
sd->plexoffset = lastsd->sectors + lastsd->plexoffset; /* starts here */
else /* striped or RAID-5, */
sd->plexoffset = plex->stripesize * plex->subdisks; /* starts here */
} else /* first subdisk */
sd->plexoffset = 0; /* start at the beginning */
}
if (plex->subdisks == MAXSD) /* we already have our maximum */
throw_rude_remark(ENOSPC, /* crap out */
"Can't add %s to %s: plex full\n",
sd->name,
plex->name);
plex->subdisks++; /* another entry */
if (plex->subdisks >= plex->subdisks_allocated) /* need more space */
EXPAND(plex->sdnos, int, plex->subdisks_allocated, INITIAL_SUBDISKS_IN_PLEX);
/* Adjust size of plex and volume. */
plex->length += sd->sectors; /* plex gets this much bigger */
if (plex->volno >= 0) /* we have a volume */
VOL[plex->volno].size = max(VOL[plex->volno].size, plex->length); /* adjust its size */
/* We need to check that the subdisks don't overlap,
* but we can't do that until a point where we *must*
* know the size of all the subdisks. That's not
* here. But we need to sort them by offset */
for (i = 0; i < plex->subdisks - 1; i++) {
if (sd->plexoffset < SD[plex->sdnos[i]].plexoffset) { /* it fits before this one */
/* First move any remaining subdisks by one */
int j;
for (j = plex->subdisks - 1; j > i; j--) /* move up one at a time */
plex->sdnos[j] = plex->sdnos[j - 1];
plex->sdnos[i] = sdno;
sd->plexsdno = i; /* note where we are in the subdisk */
return i;
}
}
/* The plex doesn't have any subdisk with a larger
* offset. Insert it */
plex->sdnos[i] = sdno;
sd->plexsdno = i; /* note where we are in the subdisk */
return i;
}
/* Add a subdisk to drive if possible. The pointer to the drive
* must already be stored in the sd structure, but the drive
* doesn't know about the subdisk yet. */
static void
give_sd_to_drive(int sdno)
{
struct sd *sd; /* pointer to subdisk */
struct drive *drive; /* and drive */
int fe; /* index in free list */
sd = &SD[sdno]; /* point to sd */
drive = &DRIVE[sd->driveno]; /* and drive */
if (drive->state != drive_up)
update_sd_state(sdno); /* that crashes the subdisk */
if (sd->sectors > drive->sectors_available) { /* too big, */
sd->driveoffset = -1; /* don't be confusing */
throw_rude_remark(ENOSPC, "No space for %s on %s", sd->name, drive->label.name);
}
drive->subdisks_used++; /* one more subdisk */
/* no offset specified, find one */
if (sd->driveoffset < 0) {
for (fe = 0; fe < drive->freelist_entries; fe++) {
if (drive->freelist[fe].sectors >= sd->sectors) { /* it'll fit here */
sd->driveoffset = drive->freelist[fe].offset;
if (sd->sectors == drive->freelist[fe].sectors) { /* used up the entire entry */
if (fe < (drive->freelist_entries - 1)) /* not the last one, */
bcopy(&drive->freelist[fe + 1],
&drive->freelist[fe],
(drive->freelist_entries - fe) * sizeof(struct drive_freelist));
drive->freelist_entries--; /* one less entry */
} else {
drive->freelist[fe].sectors -= sd->sectors; /* this much less space */
drive->freelist[fe].offset += sd->sectors; /* this much further on */
}
drive->sectors_available -= sd->sectors; /* and note how much less space we have */
break;
}
}
if (fe == drive->freelist_entries)
/* Didn't find anything. Although the drive has
* enough space, it's too fragmented */
{
sd->driveoffset = -1; /* don't be confusing */
throw_rude_remark(ENOSPC, "No space for %s on %s", sd->name, drive->label.name);
}
} else { /* specific offset */
/* For a specific offset to work, the space must be
* entirely in a single freelist entry. Look for it. */
u_int64_t sdend = sd->driveoffset + sd->sectors; /* end of our subdisk */
for (fe = 0; fe < drive->freelist_entries; fe++) {
u_int64_t dend = drive->freelist[fe].offset + drive->freelist[fe].sectors; /* end of entry */
if (dend >= sdend) { /* fits before here */
if (drive->freelist[fe].offset > sd->driveoffset) /* starts after the beginning of sd area */
throw_rude_remark(ENOSPC,
"No space for subdisk %s on drive %s at offset %qd\n",
sd->name,
drive->label.name);
/* We've found the space, and we can allocate it.
* We don't need to say that to the subdisk, which
* already knows about it. We need to tell it to
* the free list, though. We have four possibilities:
*
* 1. The subdisk exactly eats up the entry. That's the
* same as above.
* 2. The subdisk starts at the beginning and leaves space
* at the end.
* 3. The subdisk starts after the beginning and leaves
* space at the end as well: we end up with another
* fragment.
* 4. The subdisk leaves space at the beginning and finishes
* at the end.
*/
drive->sectors_available -= sd->sectors; /* note how much less space we have */
if (sd->driveoffset == drive->freelist[fe].offset) { /* 1 or 2 */
if (sd->sectors == drive->freelist[fe].sectors) { /* 1: used up the entire entry */
if (fe < (drive->freelist_entries - 1)) /* not the last one, */
bcopy(&drive->freelist[fe + 1],
&drive->freelist[fe],
(drive->freelist_entries - fe) * sizeof(struct drive_freelist));
drive->freelist_entries--; /* one less entry */
} else { /* 2: space at the end */
drive->freelist[fe].sectors -= sd->sectors; /* this much less space */
drive->freelist[fe].offset += sd->sectors; /* this much further on */
}
} else { /* 3 or 4 */
drive->freelist[fe].sectors = sd->driveoffset - drive->freelist[fe].offset;
if (dend > sdend) { /* 3: space at the end as well */
if (fe < (drive->freelist_entries - 1)) /* not the last one */
bcopy(&drive->freelist[fe], /* move the rest down */
&drive->freelist[fe + 1],
(drive->freelist_entries - fe) * sizeof(struct drive_freelist));
drive->freelist_entries++; /* one less entry */
drive->freelist[fe + 1].offset = sdend; /* second entry starts after sd */
drive->freelist[fe + 1].sectors = dend - sdend; /* and is this long */
}
}
break;
}
}
}
drive->opencount++; /* one more subdisk attached */
}
/* Get an empty drive entry from the drive table */
int
get_empty_drive(void)
{
int driveno;
struct drive *drive;
/* first see if we have one which has been deallocated */
for (driveno = 0; driveno < vinum_conf.drives_used; driveno++) {
if (DRIVE[driveno].state == drive_unallocated) /* bingo */
break;
}
if (driveno >= vinum_conf.drives_used)
/* Couldn't find a deallocated drive. Allocate a new one */
{
vinum_conf.drives_used++;
if (vinum_conf.drives_used > vinum_conf.drives_allocated) /* we've used all our allocation */
EXPAND(DRIVE, struct drive, vinum_conf.drives_allocated, INITIAL_DRIVES);
}
/* got a drive entry. Make it pretty */
drive = &DRIVE[driveno];
bzero(drive, sizeof(struct drive));
drive->driveno = driveno; /* put number in structure */
return driveno; /* return the index */
}
/* Find the named drive in vinum_conf.drive, return a pointer
* return the index in vinum_conf.drive.
* Don't mark the drive as allocated (XXX SMP)
* If create != 0, create an entry if it doesn't exist
*/
/* XXX check if we have it open from attach */
int
find_drive(const char *name, int create)
{
int driveno;
struct drive *drive;
if (name != NULL) {
for (driveno = 0; driveno < vinum_conf.drives_used; driveno++) {
drive = &DRIVE[driveno]; /* point to drive */
if ((drive->label.name[0] != '\0') /* it has a name */
&&(strcmp(drive->label.name, name) == 0)) /* and it's this one: found */
return driveno;
}
}
/* the drive isn't in the list. Add it if he wants */
if (create == 0) /* don't want to create */
return -1; /* give up */
driveno = get_empty_drive();
drive = &DRIVE[driveno];
if (name != NULL)
bcopy(name, /* put in its name */
drive->label.name,
min(sizeof(drive->label.name),
strlen(name)));
drive->state = drive_uninit; /* in use, nothing worthwhile there */
drive->flags |= VF_NEWBORN; /* newly born drive */
return driveno; /* return the index */
}
/* Find a drive given its device name.
* devname must be valid.
* Otherwise the same as find_drive above */
int
find_drive_by_dev(const char *devname, int create)
{
int driveno;
struct drive *drive;
for (driveno = 0; driveno < vinum_conf.drives_used; driveno++) {
drive = &DRIVE[driveno]; /* point to drive */
if ((drive->label.name[0] != '\0') /* it has a name */
&&(strcmp(drive->devicename, devname) == 0)) /* and it's this one: found */
return driveno;
}
/* the drive isn't in the list. Add it if he wants */
if (create == 0) /* don't want to create */
return -1; /* give up */
driveno = get_empty_drive();
drive = &DRIVE[driveno];
bcopy(devname, /* put in its name */
drive->devicename,
min(sizeof(drive->devicename),
strlen(devname)));
drive->state = drive_uninit; /* in use, nothing worthwhile there */
drive->flags |= VF_NEWBORN; /* newly born drive */
return driveno; /* return the index */
}
/* Find an empty subdisk in the subdisk table */
int
get_empty_sd(void)
{
int sdno;
struct sd *sd;
/* first see if we have one which has been deallocated */
for (sdno = 0; sdno < vinum_conf.subdisks_used; sdno++) {
if (SD[sdno].state == sd_unallocated) /* bingo */
break;
}
if (sdno >= vinum_conf.subdisks_used) { /* No unused sd found. Allocate a new one */
vinum_conf.subdisks_used++;
if (vinum_conf.subdisks_used > vinum_conf.subdisks_allocated)
EXPAND(SD, struct sd, vinum_conf.subdisks_allocated, INITIAL_SUBDISKS);
}
/* initialize some things */
sd = &SD[sdno]; /* point to it */
bzero(sd, sizeof(struct sd)); /* initialize */
sd->plexno = -1; /* no plex */
sd->driveno = -1; /* and no drive */
sd->plexoffset = -1; /* and no offsets */
sd->driveoffset = -1;
return sdno; /* return the index */
}
/* return a drive to the free pool */
void
free_drive(struct drive *drive)
{
lockdrive(drive);
if (drive->vp != NULL) /* device open */
vn_close(drive->vp, FREAD | FWRITE, FSCRED, drive->p);
bzero(drive, sizeof(struct drive)); /* this also sets drive_unallocated */
vinum_conf.drives_used--; /* one less drive */
unlockdrive(drive);
}
/* Find the named subdisk in vinum_conf.sd.
* If create != 0, create an entry if it doesn't exist
*
* Return index in vinum_conf.sd
*/
int
find_subdisk(const char *name, int create)
{
int sdno;
struct sd *sd;
for (sdno = 0; sdno < vinum_conf.subdisks_allocated; sdno++) {
if (strcmp(SD[sdno].name, name) == 0) /* found it */
return sdno;
}
/* the subdisk isn't in the list. Add it if he wants */
if (create == 0) /* don't want to create */
return -1; /* give up */
/* Allocate one and insert the name */
sdno = get_empty_sd();
sd = &SD[sdno];
bcopy(name, sd->name, min(sizeof(sd->name), strlen(name))); /* put in its name */
sd->flags |= VF_NEWBORN; /* newly born subdisk */
return sdno; /* return the pointer */
}
/* Free an allocated sd entry
* This performs memory management only. remove()
* is responsible for checking relationships.
*/
void
free_sd(int sdno)
{
struct sd *sd;
struct drive *drive;
int fe; /* free list entry */
u_int64_t sdend; /* end of our subdisk */
u_int64_t dend; /* end of our freelist entry */
sd = &SD[sdno];
if ((sd->driveno >= 0) /* we have a drive, */
&&(sd->sectors > 0)) { /* and some space on it */
drive = &DRIVE[sd->driveno];
sdend = sd->driveoffset + sd->sectors; /* end of our subdisk */
/* Look for where to return the sd address space */
for (fe = 0;
(fe < drive->freelist_entries) && (drive->freelist[fe].offset < sd->driveoffset);
fe++);
/* Now we are pointing to the last entry, the first
* with a higher offset than the subdisk, or both. */
if ((fe > 1) /* not the first entry */
&&((fe == drive->freelist_entries) /* gone past the end */
||(drive->freelist[fe].offset > sd->driveoffset))) /* or past the block were looking for */
fe--; /* point to the block before */
dend = drive->freelist[fe].offset + drive->freelist[fe].sectors; /* end of the entry */
/* At this point, we are pointing to the correct
* place in the free list. A number of possibilities
* exist:
*
* 1. The block to be freed immediately follows
* the block to which we are pointing. Just
* enlarge it.
* 2. The block to be freed starts at the end of
* the current block and ends at the beginning
* of the following block. Merge the three
* areas into a single block.
* 3. The block to be freed starts after the end
* of the block and ends before the start of
* the following block. Create a new free block.
* 4. The block to be freed starts after the end
* of the block, but ends at the start of the
* following block. Enlarge the following block
* downwards.
*
*/
if (sd->driveoffset == dend) { /* it starts after the end of this block */
if ((fe < drive->freelist_entries - 1) /* we're not the last block in the free list */
&&(sdend == drive->freelist[fe + 1].offset)) { /* and the subdisk ends at the start of the
* next block */
drive->freelist[fe].sectors = drive->freelist[fe + 1].sectors; /* 2: merge all three blocks */
if (fe < drive->freelist_entries - 2) /* still more blocks after next */
bcopy(&drive->freelist[fe + 2], /* move down one */
&drive->freelist[fe + 1],
(drive->freelist_entries - 2 - fe) * sizeof(struct drive_freelist));
drive->freelist_entries--; /* one less entry in the free list */
} else /* 1: just enlarge this block */
drive->freelist[fe].sectors += sd->sectors;
} else {
if (sd->driveoffset > dend) /* it starts after this block */
fe++; /* so look at the next block */
if ((fe < drive->freelist_entries) /* we're not the last block in the free list */
&&(sdend == drive->freelist[fe].offset)) { /* and the subdisk ends at the start of
* this block: case 4 */
drive->freelist[fe].offset = sd->driveoffset; /* it starts where the sd was */
drive->freelist[fe].sectors += sd->sectors; /* and it's this much bigger */
} else { /* case 3: non-contiguous */
if (fe < drive->freelist_entries) /* not after the last block, */
bcopy(&drive->freelist[fe], /* move the rest up one entry */
&drive->freelist[fe + 1],
(drive->freelist_entries - fe) * sizeof(struct drive_freelist));
drive->freelist_entries++; /* one less entry */
drive->freelist[fe].offset = sd->driveoffset; /* this entry represents the sd */
drive->freelist[fe].sectors = sd->sectors;
}
}
drive->opencount--; /* one less subdisk attached */
}
bzero(sd, sizeof(struct sd)); /* and clear it out */
sd->state = sd_unallocated;
vinum_conf.subdisks_used--; /* one less sd */
}
/* Find an empty plex in the plex table */
int
get_empty_plex(void)
{
int plexno;
struct plex *plex; /* if we allocate one */
/* first see if we have one which has been deallocated */
for (plexno = 0; plexno < vinum_conf.plexes_used; plexno++) {
if (PLEX[plexno].state == plex_unallocated) /* bingo */
break; /* and get out of here */
}
if (plexno >= vinum_conf.plexes_used) {
/* Couldn't find a deallocated plex. Allocate a new one */
vinum_conf.plexes_used++;
if (vinum_conf.plexes_used > vinum_conf.plexes_allocated)
EXPAND(PLEX, struct plex, vinum_conf.plexes_allocated, INITIAL_PLEXES);
}
/* Found a plex. Give it an sd structure */
plex = &PLEX[plexno]; /* this one is ours */
bzero(plex, sizeof(struct plex)); /* polish it up */
plex->sdnos = (int *) Malloc(sizeof(int) * INITIAL_SUBDISKS_IN_PLEX); /* allocate sd table */
CHECKALLOC(plex->sdnos, "vinum: Can't allocate plex subdisk table");
bzero(plex->sdnos, (sizeof(int) * INITIAL_SUBDISKS_IN_PLEX)); /* do we need this? */
plex->subdisks = 0; /* no subdisks in use */
plex->subdisks_allocated = INITIAL_SUBDISKS_IN_PLEX; /* and we have space for this many */
plex->organization = plex_disorg; /* and it's not organized */
plex->volno = -1; /* no volume yet */
return plexno; /* return the index */
}
/* Find the named plex in vinum_conf.plex
* If create != 0, create an entry if it doesn't exist
* return index in vinum_conf.plex
*/
int
find_plex(const char *name, int create)
{
int plexno;
struct plex *plex;
for (plexno = 0; plexno < vinum_conf.plexes_allocated; plexno++) {
if (strcmp(PLEX[plexno].name, name) == 0) /* found it */
return plexno;
}
/* the plex isn't in the list. Add it if he wants */
if (create == 0) /* don't want to create */
return -1; /* give up */
/* Allocate one and insert the name */
plexno = get_empty_plex();
plex = &PLEX[plexno]; /* point to it */
bcopy(name, plex->name, min(sizeof(plex->name), strlen(name))); /* put in its name */
plex->flags |= VF_NEWBORN; /* newly born plex */
return plexno; /* return the pointer */
}
/* Free an allocated plex entry
* and its associated memory areas */
void
free_plex(int plexno)
{
struct plex *plex;
plex = &PLEX[plexno];
if (plex->sdnos)
Free(plex->sdnos);
if (plex->lock)
Free(plex->lock);
bzero(plex, sizeof(struct plex)); /* and clear it out */
plex->state = plex_unallocated;
vinum_conf.plexes_used--; /* one less plex */
}
/* Find an empty volume in the volume table */
int
get_empty_volume(void)
{
int volno;
struct volume *vol;
/* first see if we have one which has been deallocated */
for (volno = 0; volno < vinum_conf.volumes_used; volno++) {
if (VOL[volno].state == volume_unallocated) /* bingo */
break;
}
if (volno >= vinum_conf.volumes_used)
/* Couldn't find a deallocated volume. Allocate a new one */
{
vinum_conf.volumes_used++;
if (vinum_conf.volumes_used > vinum_conf.volumes_allocated)
EXPAND(VOL, struct volume, vinum_conf.volumes_allocated, INITIAL_VOLUMES);
}
/* Now initialize fields */
vol = &VOL[volno];
bzero(vol, sizeof(struct volume));
vol->preferred_plex = -1; /* default to round robin */
vol->preferred_plex = ROUND_ROBIN_READPOL; /* round robin */
return volno; /* return the index */
}
/* Find the named volume in vinum_conf.volume.
* If create != 0, create an entry if it doesn't exist
* return the index in vinum_conf
*/
int
find_volume(const char *name, int create)
{
int volno;
struct volume *vol;
for (volno = 0; volno < vinum_conf.volumes_used; volno++) {
if (strcmp(VOL[volno].name, name) == 0) /* found it */
return volno;
}
/* the volume isn't in the list. Add it if he wants */
if (create == 0) /* don't want to create */
return -1; /* give up */
/* Allocate one and insert the name */
volno = get_empty_volume();
vol = &VOL[volno];
bcopy(name, vol->name, min(sizeof(vol->name), strlen(name))); /* put in its name */
vol->blocksize = DEV_BSIZE; /* block size of this volume */
vol->flags |= VF_NEWBORN; /* newly born volume */
return volno; /* return the pointer */
}
/* Free an allocated volume entry
* and its associated memory areas */
void
free_volume(int volno)
{
struct volume *vol;
vol = &VOL[volno];
bzero(vol, sizeof(struct volume)); /* and clear it out */
vol->state = volume_unallocated;
vinum_conf.volumes_used--; /* one less volume */
}
/* Handle a drive definition. We store the information in the global variable
* drive, so we don't need to allocate.
*
* If we find an error, print a message and return
*/
void
config_drive(int update)
{
enum drive_label_info partition_status; /* info about the partition */
int parameter;
int driveno; /* index of drive in vinum_conf */
struct drive *drive; /* and pointer to it */
if (tokens < 2) /* not enough tokens */
throw_rude_remark(EINVAL, "Drive has no name");
driveno = find_drive(token[1], 1); /* allocate a drive to initialize */
drive = &DRIVE[driveno]; /* and get a pointer */
if (update && ((drive->flags & VF_NEWBORN) == 0)) /* this drive exists already */
return; /* don't do anything */
drive->flags &= ~VF_NEWBORN; /* no longer newly born */
if (drive->state != drive_uninit) { /* we already know this drive */
/* XXX Check which definition is more up-to-date. Give
* preference for the definition on its own drive */
return; /* XXX */
}
for (parameter = 2; parameter < tokens; parameter++) { /* look at the other tokens */
switch (get_keyword(token[parameter], &keyword_set)) {
case kw_device:
parameter++;
if (drive->devicename[0] != '\0') { /* we know this drive... */
if (strcmp(drive->devicename, token[parameter])) /* different name */
close_drive(drive); /* close it if it's open */
else /* no change */
break;
}
/* open the device and get the configuration */
bcopy(token[parameter], /* insert device information */
drive->devicename,
min(sizeof(drive->devicename),
strlen(token[parameter])));
partition_status = read_drive_label(drive, 1);
switch (partition_status) {
case DL_CANT_OPEN: /* not our kind */
close_drive(drive);
if (drive->lasterror == EFTYPE) /* wrong kind of partition */
throw_rude_remark(drive->lasterror,
"Drive %s has invalid partition type",
drive->label.name);
else /* I/O error of some kind */
throw_rude_remark(drive->lasterror,
"Can't initialize drive %s",
drive->label.name);
break;
case DL_WRONG_DRIVE: /* valid drive, not the name we expected */
close_drive(drive);
throw_rude_remark(drive->lasterror,
"Incorrect drive name %s specified for drive %s",
token[1],
drive->label.name);
break;
case DL_DELETED_LABEL: /* it was a drive, but we deleted it */
break;
case DL_NOT_OURS: /* nothing to do with the rest */
case DL_OURS:
break;
}
/* read_drive_label overwrites the device name.
* If we get here, we can have the drive,
* so put it back again */
bcopy(token[parameter],
drive->devicename,
min(sizeof(drive->devicename),
strlen(token[parameter])));
break;
case kw_state:
checkkernel(token[++parameter]); /* must be a kernel user */
drive->state = DriveState(token[parameter]); /* set the state */
break;
default:
close_drive(drive);
throw_rude_remark(EINVAL,
"Drive %s, invalid keyword: %s",
token[1],
token[parameter]);
}
}
if (drive->devicename[0] == '\0') {
drive->state = drive_unallocated; /* deallocate the drive */
throw_rude_remark(EINVAL, "No device name for %s", drive->label.name);
}
}
/* Handle a subdisk definition. We store the information in the global variable
* sd, so we don't need to allocate.
*
* If we find an error, print a message and return
*/
void
config_subdisk(int update)
{
int parameter;
int sdno; /* index of sd in vinum_conf */
struct sd *sd; /* and pointer to it */
u_int64_t size;
int detached = 0; /* set to 1 if this is a detached subdisk */
int sdindex = -1; /* index in plexes subdisk table */
int namedsdno;
enum sdstate state = sd_unallocated; /* state to set, if specified */
sdno = get_empty_sd(); /* allocate an SD to initialize */
sd = &SD[sdno]; /* and get a pointer */
for (parameter = 1; parameter < tokens; parameter++) { /* look at the other tokens */
switch (get_keyword(token[parameter], &keyword_set)) {
case kw_detached:
detached = 1;
break;
case kw_plexoffset:
size = sizespec(token[++parameter]);
if ((size % DEV_BSIZE) != 0)
throw_rude_remark(EINVAL, "sd %s, bad plex offset alignment: %qd", sd->name, size);
else
sd->plexoffset = size / DEV_BSIZE;
break;
case kw_driveoffset:
size = sizespec(token[++parameter]);
if ((size % DEV_BSIZE) != 0)
throw_rude_remark(EINVAL, "sd %s, bad drive offset alignment: %qd", sd->name, size);
else
sd->driveoffset = size / DEV_BSIZE;
break;
case kw_name:
namedsdno = find_subdisk(token[++parameter], 0); /* find an existing sd with this name */
if (namedsdno >= 0) { /* got one */
if (update) /* are we updating? */
return; /* that's OK, nothing more to do */
else
throw_rude_remark(EINVAL, "Duplicate subdisk %s", token[parameter]);
}
bcopy(token[parameter],
sd->name,
min(sizeof(sd->name), strlen(token[parameter])));
break;
case kw_len:
size = sizespec(token[++parameter]);
if ((size % DEV_BSIZE) != 0)
throw_rude_remark(EINVAL, "sd %s, length %d not multiple of sector size", sd->name, size);
else
sd->sectors = size / DEV_BSIZE;
break;
case kw_drive:
sd->driveno = find_drive(token[++parameter], 1); /* insert drive information */
break;
case kw_plex:
sd->plexno = find_plex(token[++parameter], 1); /* insert plex information */
break;
/* Set the state. We can't do this directly,
* because give_sd_to_plex may change it */
case kw_state:
checkkernel(token[++parameter]); /* must be a kernel user */
state = SdState(token[parameter]); /* set the state */
break;
default:
throw_rude_remark(EINVAL, "sd %s, invalid keyword: %s", sd->name, token[parameter]);
}
}
/* Check we have a drive name */
if (sd->driveno < 0) { /* didn't specify a drive */
sd->driveno = current_drive; /* set to the current drive */
if (sd->driveno < 0) /* no current drive? */
throw_rude_remark(EINVAL, "Subdisk %s is not associated with a drive", sd->name);
}
/* Check for a plex name */
if ((sd->plexno < 0) /* didn't specify a plex */
&&(!detached)) /* and didn't say not to, */
sd->plexno = current_plex; /* set to the current plex */
if (sd->plexno >= 0)
sdindex = give_sd_to_plex(sd->plexno, sdno); /* now tell the plex that it has this sd */
sd->sdno = sdno; /* point to our entry in the table */
/* Does the subdisk have a name? If not, give it one */
if (sd->name[0] == '\0') { /* no name */
char sdsuffix[8]; /* form sd name suffix here */
/* Do we have a plex name? */
if (sdindex >= 0) /* we have a plex */
strcpy(sd->name, PLEX[sd->plexno].name); /* take it from there */
else /* no way */
throw_rude_remark(EINVAL, "Unnamed sd is not associated with a plex");
sprintf(sdsuffix, ".s%d", sdindex); /* form the suffix */
strcat(sd->name, sdsuffix); /* and add it to the name */
}
/* do we have complete info for this subdisk? */
if (sd->sectors == 0)
throw_rude_remark(EINVAL, "sd %s has no length spec", sd->name);
if (state != sd_unallocated) /* we had a specific state to set */
sd->state = state; /* do it now */
else if (sd->state == sd_unallocated) /* no, nothing set yet, */
sd->state = sd_up; /* must be up */
/* register the subdisk with the drive. This action
* will have the side effect of setting the offset if
* we haven't specified one, and causing an error
* message if it overlaps with another subdisk. */
give_sd_to_drive(sdno);
}
/* Handle a plex definition.
*/
void
config_plex(int update)
{
int parameter;
int plexno; /* index of plex in vinum_conf */
struct plex *plex; /* and pointer to it */
int pindex = MAXPLEX; /* index in volume's plex list */
int detached = 0; /* don't give it to a volume */
int namedplexno;
current_plex = -1; /* forget the previous plex */
plexno = get_empty_plex(); /* allocate a plex */
plex = &PLEX[plexno]; /* and point to it */
plex->plexno = plexno; /* and back to the config */
for (parameter = 1; parameter < tokens; parameter++) { /* look at the other tokens */
switch (get_keyword(token[parameter], &keyword_set)) {
case kw_detached:
detached = 1;
break;
case kw_name:
namedplexno = find_plex(token[++parameter], 0); /* find an existing plex with this name */
if (namedplexno >= 0) { /* plex exists already, */
if (update) /* are we updating? */
return; /* yes: that's OK, just return */
else
throw_rude_remark(EINVAL, "Duplicate plex %s", token[parameter]);
}
bcopy(token[parameter], /* put in the name */
plex->name,
min(MAXPLEXNAME, strlen(token[parameter])));
break;
case kw_org: /* plex organization */
switch (get_keyword(token[++parameter], &keyword_set)) {
case kw_concat:
plex->organization = plex_concat;
break;
case kw_striped:
{
int stripesize = sizespec(token[++parameter]);
plex->organization = plex_striped;
if (stripesize % DEV_BSIZE != 0) /* not a multiple of block size, */
throw_rude_remark(EINVAL, "plex %s: stripe size %d not a multiple of sector size",
plex->name,
stripesize);
else
plex->stripesize = stripesize / DEV_BSIZE;
break;
}
default:
throw_rude_remark(EINVAL, "Invalid plex organization");
}
if (((plex->organization == plex_striped)
)
&& (plex->stripesize == 0)) /* didn't specify a valid stripe size */
throw_rude_remark(EINVAL, "Need a stripe size parameter");
break;
case kw_volume:
plex->volno = find_volume(token[++parameter], 1); /* insert a pointer to the volume */
break;
case kw_sd: /* add a subdisk */
{
int sdno;
sdno = find_subdisk(token[++parameter], 1); /* find a subdisk */
SD[sdno].plexoffset = sizespec(token[++parameter]); /* get the offset */
give_sd_to_plex(plexno, sdno); /* and insert it there */
break;
}
case kw_state:
checkkernel(token[++parameter]); /* only for kernel use */
plex->state = PlexState(token[parameter]); /* set the state */
break;
default:
throw_rude_remark(EINVAL, "plex %s, invalid keyword: %s",
plex->name,
token[parameter]);
}
}
if ((plex->volno < 0) /* we don't have a volume */
&&(!detached)) /* and we wouldn't object */
plex->volno = current_volume;
if (plex->volno >= 0)
pindex = give_plex_to_volume(plex->volno, plexno); /* Now tell the volume that it has this plex */
/* Does the plex have a name? If not, give it one */
if (plex->name[0] == '\0') { /* no name */
char plexsuffix[8]; /* form plex name suffix here */
/* Do we have a volume name? */
if (plex->volno >= 0) /* we have a volume */
strcpy(plex->name, /* take it from there */
VOL[plex->volno].name);
else /* no way */
throw_rude_remark(EINVAL, "Unnamed plex is not associated with a volume");
sprintf(plexsuffix, ".p%d", pindex); /* form the suffix */
strcat(plex->name, plexsuffix); /* and add it to the name */
}
/* Note the last plex we configured */
current_plex = plexno;
if (plex->state == plex_unallocated) /* we haven't changed the state, */
plex->state = plex_init; /* we're initialized now */
}
/* Handle a volume definition.
* If we find an error, print a message, deallocate the nascent volume, and return
*/
void
config_volume(int update)
{
int parameter;
int volno;
struct volume *vol; /* collect volume info here */
int i;
if (tokens < 2) /* not enough tokens */
throw_rude_remark(EINVAL, "Volume has no name");
current_volume = -1; /* forget the previous volume */
volno = find_volume(token[1], 1); /* allocate a volume to initialize */
vol = &VOL[volno]; /* and get a pointer */
if (update && ((vol->flags & VF_NEWBORN) == 0)) /* this volume exists already */
return; /* don't do anything */
vol->flags &= ~VF_NEWBORN; /* no longer newly born */
for (parameter = 2; parameter < tokens; parameter++) { /* look at all tokens */
switch (get_keyword(token[parameter], &keyword_set)) {
case kw_plex:
{
int plexno; /* index of this plex */
plexno = find_plex(token[++parameter], 1); /* find a plex */
if (plexno < 0) /* couldn't */
break; /* we've already had an error message */
plexno = my_plex(volno, plexno); /* does it already belong to us? */
if (plexno > 0) /* yes, shouldn't get it again */
throw_rude_remark(EINVAL,
"Plex %s already belongs to volume %s",
token[parameter],
vol->name);
else if (++vol->plexes > 8) /* another entry */
throw_rude_remark(EINVAL,
"Too many plexes for volume %s",
vol->name);
vol->plex[vol->plexes - 1] = plexno;
}
break;
case kw_readpol:
switch (get_keyword(token[++parameter], &keyword_set)) { /* decide what to do */
case kw_round:
vol->preferred_plex = ROUND_ROBIN_READPOL; /* default */
break;
case kw_prefer:
{
int myplexno; /* index of this plex */
myplexno = find_plex(token[++parameter], 1); /* find a plex */
if (myplexno < 0) /* couldn't */
break; /* we've already had an error message */
myplexno = my_plex(volno, myplexno); /* does it already belong to us? */
if (myplexno > 0) /* yes */
vol->preferred_plex = myplexno; /* just note the index */
else if (++vol->plexes > 8) /* another entry */
throw_rude_remark(EINVAL, "Too many plexes");
else { /* space for the new plex */
vol->plex[vol->plexes - 1] = myplexno; /* add it to our list */
vol->preferred_plex = vol->plexes - 1; /* and note the index */
}
}
break;
default:
throw_rude_remark(EINVAL, "Invalid read policy");
}
case kw_setupstate:
vol->flags |= VF_CONFIG_SETUPSTATE; /* set the volume up later on */
break;
case kw_state:
checkkernel(token[++parameter]); /* must be a kernel user */
vol->state = VolState(token[parameter]); /* set the state */
break;
/* XXX experimental ideas. These are not
* documented, and will not be until I
* decide they're worth keeping */
case kw_writethrough: /* set writethrough mode */
vol->flags |= VF_WRITETHROUGH;
break;
case kw_writeback: /* set writeback mode */
vol->flags &= ~VF_WRITETHROUGH;
break;
case kw_raw:
vol->flags |= VF_RAW; /* raw volume (no label) */
break;
default:
throw_rude_remark(EINVAL, "volume %s, invalid keyword: %s",
vol->name,
token[parameter]);
}
}
current_volume = volno; /* note last referred volume */
vol->devno = VINUMBDEV(volno, 0, 0, VINUM_VOLUME_TYPE); /* also note device number */
/* Before we can actually use the volume, we need
* a volume label. We could start to fake one here,
* but it will be a lot easier when we have some
* to copy from the drives, so defer it until we
* set up the configuration. XXX */
if (vol->state == volume_unallocated)
vol->state = volume_down; /* now ready to bring up at the end */
/* Find out how big our volume is */
for (i = 0; i < vol->plexes; i++)
vol->size = max(vol->size, PLEX[vol->plex[i]].length);
}
/* Parse a config entry. CARE! This destroys the original contents of the
* config entry, which we don't really need after this. More specifically, it
* places \0 characters at the end of each token.
*
* Return 0 if all is well, otherwise EINVAL */
int
parse_config(char *cptr, struct keywordset *keyset, int update)
{
int status;
status = 0; /* until proven otherwise */
tokens = tokenize(cptr, token); /* chop up into tokens */
if (tokens <= 0) /* screwed up or empty line */
return tokens; /* give up */
if (token[0][0] == '#') /* comment line */
return 0;
switch (get_keyword(token[0], keyset)) { /* decide what to do */
case kw_read: /* read config from a specified drive */
vinum_scandisk(&token[1], tokens - 1); /* read the config from disk */
break;
case kw_drive:
config_drive(update);
break;
case kw_subdisk:
config_subdisk(update);
break;
case kw_plex:
config_plex(update);
break;
case kw_volume:
config_volume(update);
break;
/* Anything else is invalid in this context */
default:
throw_rude_remark(EINVAL, /* should we die? */
"Invalid configuration information: %s",
token[0]);
}
return status;
}
/* parse a line handed in from userland via ioctl.
* This differs only by the error reporting mechanism:
* we return the error indication in the reply to the
* ioctl, so we need to set a global static pointer in
* this file. This technique works because we have
* ensured that configuration is performed in a single-
* threaded manner */
int
parse_user_config(char *cptr, struct keywordset *keyset)
{
int status;
ioctl_reply = (struct _ioctl_reply *) cptr;
status = parse_config(cptr, keyset, 0);
ioctl_reply = NULL; /* don't do this again */
return status;
}
/* Remove an object */
void
remove(struct vinum_ioctl_msg *msg)
{
struct vinum_ioctl_msg message = *msg; /* make a copy to hand on */
ioctl_reply = (struct _ioctl_reply *) msg; /* reinstate the address to reply to */
ioctl_reply->error = 0; /* no error, */
ioctl_reply->msg[0] = '\0'; /* no message */
switch (message.type) {
case drive_object:
remove_drive_entry(message.index, message.force, message.recurse);
updateconfig(0);
return;
case sd_object:
remove_sd_entry(message.index, message.force, message.recurse);
updateconfig(0);
return;
case plex_object:
remove_plex_entry(message.index, message.force, message.recurse);
updateconfig(0);
return;
case volume_object:
remove_volume_entry(message.index, message.force, message.recurse);
updateconfig(0);
return;
default:
ioctl_reply->error = EINVAL;
strcpy(ioctl_reply->msg, "Invalid object type");
}
}
/* Remove a drive. */
void
remove_drive_entry(int driveno, int force, int recurse)
{
struct drive *drive = &DRIVE[driveno];
if ((driveno > vinum_conf.drives_used) /* not a valid drive */
||(drive->state == drive_unallocated)) { /* or nothing there */
ioctl_reply->error = EINVAL;
strcpy(ioctl_reply->msg, "No such drive");
} else if (drive->opencount > 0) { /* we have subdisks */
if (force) { /* do it at any cost */
int sdno;
struct vinum_ioctl_msg sdmsg;
for (sdno = 0; sdno < vinum_conf.subdisks_used; sdno++) {
if ((SD[sdno].state != sd_unallocated) /* subdisk is allocated */
&&(SD[sdno].driveno == driveno)) { /* and it belongs to this drive */
sdmsg.index = sdno;
sdmsg.type = sd_object;
sdmsg.recurse = 1;
sdmsg.force = force;
remove(&sdmsg); /* remove the subdisk by force */
}
}
remove_drive(driveno); /* now remove it */
} else
ioctl_reply->error = EBUSY; /* can't do that */
} else
remove_drive(driveno); /* just remove it */
}
/* remove a subdisk */
void
remove_sd_entry(int sdno, int force, int recurse)
{
struct sd *sd = &SD[sdno];
if ((sdno > vinum_conf.subdisks_used) /* not a valid sd */
||(sd->state == sd_unallocated)) { /* or nothing there */
ioctl_reply->error = EINVAL;
strcpy(ioctl_reply->msg, "No such subdisk");
} else if (sd->plexno >= 0) { /* we have a plex */
if (force) { /* do it at any cost */
struct plex *plex = &PLEX[sd->plexno]; /* point to our plex */
int mysdno;
for (mysdno = 0; /* look for ourselves */
mysdno < plex->subdisks && &SD[plex->sdnos[mysdno]] != sd;
mysdno++);
if (mysdno == plex->subdisks) /* didn't find it */
throw_rude_remark(ENOENT, "plex %s does not contain subdisk %s", plex->name, sd->name);
if (mysdno < (plex->subdisks - 1)) /* not the last subdisk */
bcopy(&plex->sdnos[mysdno + 1],
&plex->sdnos[mysdno],
(plex->subdisks - 1 - mysdno) * sizeof(int));
plex->subdisks--;
/* removing a subdisk from a striped or
* RAID-5 plex really tears the hell out
* of the structure, and it needs to be
* reinitialized */
/* XXX Think about this. Maybe we should just
* leave a hole */
if (plex->organization != plex_concat) /* not concatenated, */
set_plex_state(plex->plexno, plex_faulty, setstate_force); /* need to reinitialize */
printf("vinum: removing %s\n", sd->name);
free_sd(sdno);
} else
ioctl_reply->error = EBUSY; /* can't do that */
} else {
printf("vinum: removing %s\n", sd->name);
free_sd(sdno);
}
}
/* remove a plex */
void
remove_plex_entry(int plexno, int force, int recurse)
{
struct plex *plex = &PLEX[plexno];
int sdno;
if ((plexno > vinum_conf.plexes_used) /* not a valid plex */
||(plex->state == plex_unallocated)) { /* or nothing there */
ioctl_reply->error = EINVAL;
strcpy(ioctl_reply->msg, "No such plex");
} else if (plex->pid) { /* we're open */
ioctl_reply->error = EBUSY; /* no getting around that */
return;
}
if (plex->subdisks) {
if (force) { /* do it anyway */
if (recurse) { /* remove all below */
for (sdno = 0; sdno < plex->subdisks; sdno++)
free_sd(plex->sdnos[sdno]); /* free all subdisks */
} else { /* just tear them out */
for (sdno = 0; sdno < plex->subdisks; sdno++)
SD[plex->sdnos[sdno]].plexno = -1; /* no plex any more */
}
} else { /* can't do it without force */
ioctl_reply->error = EBUSY; /* can't do that */
return;
}
}
if (plex->volno >= 0) { /* we are part of a volume */
/* XXX This should be more intelligent. We should
* be able to remove a plex as long as the volume
* does not lose any data, which is normally the
* case when it has more than one plex. To do it
* right we must compare the completeness of the
* mapping of all the plexes in the volume */
if (force) { /* do it at any cost */
struct volume *vol = &VOL[plex->volno];
int myplexno;
for (myplexno = 0; myplexno < vol->plexes; myplexno++)
if (vol->plex[myplexno] == plexno) /* found it */
break;
if (myplexno == vol->plexes) /* didn't find it. Huh? */
throw_rude_remark(ENOENT, "volume %s does not contain plex %s", vol->name, plex->name);
if (myplexno < (vol->plexes - 1)) /* not the last plex in the list */
bcopy(&vol->plex[myplexno + 1], &vol->plex[myplexno], vol->plexes - 1 - myplexno);
vol->plexes--;
} else {
ioctl_reply->error = EBUSY; /* can't do that */
return;
}
}
printf("vinum: removing %s\n", plex->name);
free_plex(plexno);
}
/* remove a volume */
void
remove_volume_entry(int volno, int force, int recurse)
{
struct volume *vol = &VOL[volno];
int plexno;
if ((volno > vinum_conf.volumes_used) /* not a valid volume */
||(vol->state == volume_unallocated)) { /* or nothing there */
ioctl_reply->error = EINVAL;
strcpy(ioctl_reply->msg, "No such volume");
} else if (vol->opencount) /* we're open */
ioctl_reply->error = EBUSY; /* no getting around that */
else if (vol->plexes) {
if (recurse && force) { /* remove all below */
struct vinum_ioctl_msg plexmsg;
plexmsg.type = plex_object;
plexmsg.recurse = 1;
plexmsg.force = force;
for (plexno = 0; plexno < vol->plexes; plexno++) {
plexmsg.index = vol->plex[plexno]; /* plex number */
remove(&plexmsg);
}
printf("vinum: removing %s\n", vol->name);
free_volume(volno);
} else
ioctl_reply->error = EBUSY; /* can't do that */
} else {
printf("vinum: removing %s\n", vol->name);
free_volume(volno);
}
}
void
update_sd_config(int sdno, int kernelstate)
{
if (!kernelstate)
set_sd_state(sdno, sd_up, setstate_configuring);
}
void
update_plex_config(int plexno, int kernelstate)
{
int error = 0;
u_int64_t size;
int sdno;
struct plex *plex = &PLEX[plexno];
enum plexstate state = plex_up; /* state we want the plex in */
/* XXX Insert checks here for sparse plexes and volumes */
/* Check that our subdisks make sense. For
* striped and RAID5 plexes, we need at least
* two subdisks, and they must all be the same
* size */
if (((plex->organization == plex_striped)
)
&& (plex->subdisks < 2)) {
error = 1;
printf("vinum: plex %s does not have at least 2 subdisks\n", plex->name);
if (!kernelstate)
set_plex_state(plexno, plex_down, setstate_force | setstate_configuring);
}
size = 0;
for (sdno = 0; sdno < plex->subdisks; sdno++) {
if (((plex->organization == plex_striped)
)
&& (sdno > 0)
&& (SD[plex->sdnos[sdno]].sectors != SD[plex->sdnos[sdno - 1]].sectors)) {
error = 1;
printf("vinum: %s must have equal sized subdisks\n", plex->name);
set_plex_state(plexno, plex_down, setstate_force | setstate_configuring);
}
size += SD[plex->sdnos[sdno]].sectors;
}
if (plex->subdisks) { /* plex has subdisks, calculate size */
/* XXX We shouldn't need to calculate the size any
* more. Check this some time */
if (plex->length != size)
printf("Correcting length of %s: was %qd, is %qd\n", plex->name, plex->length, size);
plex->length = size;
} else { /* no subdisks, */
plex->length = 0; /* no size */
state = plex_down; /* take it down */
}
if (!(kernelstate || error))
set_plex_state(plexno, state, setstate_none | setstate_configuring);
}
void
update_volume_config(int volno, int kernelstate)
{
struct volume *vol = &VOL[volno];
struct plex *plex;
int plexno;
if (vol->state != volume_unallocated)
/* Recalculate the size of the volume */
{
vol->size = 0;
for (plexno = 0; plexno < vol->plexes; plexno++) {
plex = &PLEX[vol->plex[plexno]];
vol->size = max(plex->length, vol->size); /* maximum size */
plex->volplexno = plexno; /* note it in the plex */
}
}
if (!kernelstate) /* try to bring it up */
set_volume_state(volno, volume_up, setstate_configuring);
}
/* Update the global configuration.
* kernelstate is != 0 if we're reading in a config
* from disk. In this case, we don't try to
* bring the devices up, though we will bring
* them down if there's some error which got
* missed when writing to disk.
*/
void
updateconfig(int kernelstate)
{
int plexno;
int volno;
for (plexno = 0; plexno < vinum_conf.plexes_used; plexno++)
update_plex_config(plexno, kernelstate);
for (volno = 0; volno < vinum_conf.volumes_used; volno++) {
VOL[volno].flags &= ~VF_CONFIG_SETUPSTATE; /* no more setupstate */
set_volume_state(volno, volume_up, setstate_configuring);
}
save_config();
}
/* Start manual changes to the configuration and lock out
* others who may wish to do so.
* XXX why do we need this and lock_config too? */
int
start_config(void)
{
int error;
while ((vinum_conf.flags & VF_CONFIGURING) != 0) {
vinum_conf.flags |= VF_WILL_CONFIGURE;
if ((error = tsleep(&vinum_conf, PRIBIO | PCATCH, "vincfg", 0)) != 0)
return error;
}
/* We need two flags here: VF_CONFIGURING
* tells other processes to hold off (this
* function), and VF_CONFIG_INCOMPLETE
* tells the state change routines not to
* propagate incrememntal state changes */
vinum_conf.flags |= VF_CONFIGURING | VF_CONFIG_INCOMPLETE;
current_drive = -1; /* reset the defaults */
current_plex = -1; /* and the same for the last plex */
current_volume = -1; /* and the last volme */
return 0;
}
/* Update the config if update is 1, and unlock
* it. We won't update the configuration if we
* are called in a recursive loop via throw_rude_remark.
*/
void
finish_config(int update)
{
vinum_conf.flags &= ~VF_CONFIG_INCOMPLETE; /* we've finished our config */
if (update)
updateconfig(0); /* so update things */
else
updateconfig(1); /* do some updates only */
vinum_conf.flags &= ~VF_CONFIGURING; /* and now other people can take a turn */
if ((vinum_conf.flags & VF_WILL_CONFIGURE) != 0) {
vinum_conf.flags &= ~VF_WILL_CONFIGURE;
wakeup(&vinum_conf);
}
}
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