/* This is normally the Oops function. */
void die_if_kernel(const char *str, struct pt_regs *regs, long err)
{
if (user_mode(regs))
return;
#ifdef CONFIG_ETRAX_WATCHDOG_NICE_DOGGY
/*
* This printout might take too long and could trigger
* the watchdog normally. If NICE_DOGGY is set, simply
* stop the watchdog during the printout.
*/
stop_watchdog();
#endif
oops_enter();
handle_BUG(regs);
pr_err("Linux %s %s\n", utsname()->release, utsname()->version);
pr_err("%s: %04lx\n", str, err & 0xffff);
show_registers(regs);
oops_exit();
oops_in_progress = 0;
pr_err("\n"); /* Flush mtdoops. */
#ifdef CONFIG_ETRAX_WATCHDOG_NICE_DOGGY
reset_watchdog();
#endif
do_exit(SIGSEGV);
}
long sys_olduname(struct oldold_utsname __user * name)
{
long error;
if (!name)
return -EFAULT;
if (!access_ok(VERIFY_WRITE,name,sizeof(struct oldold_utsname)))
return -EFAULT;
down_read(&uts_sem);
error = __copy_to_user(&name->sysname, &utsname()->sysname,
__OLD_UTS_LEN);
error |= __put_user(0, name->sysname + __OLD_UTS_LEN);
error |= __copy_to_user(&name->nodename, &utsname()->nodename,
__OLD_UTS_LEN);
error |= __put_user(0, name->nodename + __OLD_UTS_LEN);
error |= __copy_to_user(&name->release, &utsname()->release,
__OLD_UTS_LEN);
error |= __put_user(0, name->release + __OLD_UTS_LEN);
error |= __copy_to_user(&name->version, &utsname()->version,
__OLD_UTS_LEN);
error |= __put_user(0, name->version + __OLD_UTS_LEN);
error |= __copy_to_user(&name->machine, &utsname()->machine,
__OLD_UTS_LEN);
error |= __put_user(0, name->machine + __OLD_UTS_LEN);
up_read(&uts_sem);
error = error ? -EFAULT : 0;
return error;
}
static int version_proc_show(struct seq_file *m, void *v)
{
seq_printf(m, linux_proc_banner,
utsname()->sysname,
utsname()->release,
utsname()->version);
return 0;
}
static void version_set_default(void)
{
m_len = snprintf(m_current_version,
MAX_VERSION_STRING_LENGTH,
"%s version %s %s\n",
utsname()->sysname,
utsname()->release,
utsname()->version);
}
static int version_proc_show(struct seq_file *m, void *v)
{
#if 1 /* add to show kernel version */
seq_printf(m, "%s\n",linux_banner);
seq_printf(m, "Kernel %s (%s - %s)\n",CONFIG_KERNEL_VERSION,__DATE__,__TIME__);
#else
seq_printf(m, linux_proc_banner,
utsname()->sysname,
utsname()->release,
utsname()->version);
#endif
return 0;
}
asmlinkage int solaris_utssys(u32 buf, u32 flags, int which, u32 buf2)
{
struct sol_uname __user *v = A(buf);
int err;
switch (which) {
case 0: /* old uname */
/* Let's cheat */
err = set_utsfield(v->sysname, "SunOS", 1, 0);
down_read(&uts_sem);
err |= set_utsfield(v->nodename, utsname()->nodename,
1, 1);
up_read(&uts_sem);
err |= set_utsfield(v->release, "2.6", 0, 0);
err |= set_utsfield(v->version, "Generic", 0, 0);
err |= set_utsfield(v->machine, machine(), 0, 0);
return (err ? -EFAULT : 0);
case 2: /* ustat */
return -ENOSYS;
case 3: /* fusers */
return -ENOSYS;
default:
return -ENOSYS;
}
}
/*
* Prepare the NFS data structure and parse all options.
*/
static int __init root_nfs_name(char *name)
{
static char buf[NFS_MAXPATHLEN] __initdata;
char *cp;
/* Set some default values */
memset(&nfs_data, 0, sizeof(nfs_data));
nfs_port = -1;
nfs_data.version = NFS_MOUNT_VERSION;
nfs_data.flags = NFS_MOUNT_NONLM; /* No lockd in nfs root yet */
nfs_data.rsize = NFS_DEF_FILE_IO_SIZE;
nfs_data.wsize = NFS_DEF_FILE_IO_SIZE;
nfs_data.acregmin = NFS_DEF_ACREGMIN;
nfs_data.acregmax = NFS_DEF_ACREGMAX;
nfs_data.acdirmin = NFS_DEF_ACDIRMIN;
nfs_data.acdirmax = NFS_DEF_ACDIRMAX;
strcpy(buf, NFS_ROOT);
/* Process options received from the remote server */
root_nfs_parse(root_server_path, buf);
/* Override them by options set on kernel command-line */
root_nfs_parse(name, buf);
cp = utsname()->nodename;
if (strlen(buf) + strlen(cp) > NFS_MAXPATHLEN) {
printk(KERN_ERR "Root-NFS: Pathname for remote directory too long.\n");
return -1;
}
sprintf(nfs_export_path, buf, cp);
return 1;
}
asmlinkage long sys_gethostname(char __user *name, int len)
{
int i, errno;
if (len < 0)
return -EINVAL;
down_read(&uts_sem);
i = 1 + strlen(utsname()->nodename);
if (i > len)
i = len;
errno = 0;
if (copy_to_user(name, utsname()->nodename, i))
errno = -EFAULT;
up_read(&uts_sem);
return errno;
}
/* TODO: intern string firstly */
static int kplib_arch(ktap_state_t *ks)
{
ktap_str_t *ts = kp_str_newz(ks, utsname()->machine);
if (unlikely(!ts))
return -1;
set_string(ks->top, ts);
incr_top(ks);
return 1;
}
asmlinkage long sys_newuname(struct new_utsname __user * name)
{
int errno = 0;
down_read(&uts_sem);
if (copy_to_user(name, utsname(), sizeof *name))
errno = -EFAULT;
up_read(&uts_sem);
return errno;
}
asmlinkage long sys_sethostname(char __user *name, int len)
{
int errno;
char tmp[__NEW_UTS_LEN];
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
if (len < 0 || len > __NEW_UTS_LEN)
return -EINVAL;
down_write(&uts_sem);
errno = -EFAULT;
if (!copy_from_user(tmp, name, len)) {
memcpy(utsname()->nodename, tmp, len);
utsname()->nodename[len] = 0;
errno = 0;
}
up_write(&uts_sem);
return errno;
}
asmlinkage int sunos_uname(struct sunos_utsname __user *name)
{
int ret;
down_read(&uts_sem);
ret = copy_to_user(&name->sname[0], &utsname()->sysname[0],
sizeof(name->sname) - 1);
ret |= copy_to_user(&name->nname[0], &utsname()->nodename[0],
sizeof(name->nname) - 1);
ret |= put_user('\0', &name->nname[8]);
ret |= copy_to_user(&name->rel[0], &utsname()->release[0],
sizeof(name->rel) - 1);
ret |= copy_to_user(&name->ver[0], &utsname()->version[0],
sizeof(name->ver) - 1);
ret |= copy_to_user(&name->mach[0], &utsname()->machine[0],
sizeof(name->mach) - 1);
up_read(&uts_sem);
return (ret ? -EFAULT : 0);
}
void
spa_history_log_version(spa_t *spa, const char *operation)
{
utsname_t *u = utsname();
spa_history_log_internal(spa, operation, NULL,
"pool version %llu; software version %llu/%d; uts %s %s %s %s",
(u_longlong_t)spa_version(spa), SPA_VERSION, ZPL_VERSION,
u->nodename, u->release, u->version, u->machine);
}
asmlinkage long sys_uname(struct new_utsname __user * name)
{
int err;
down_read(&uts_sem);
err = copy_to_user(name, utsname(), sizeof (*name));
up_read(&uts_sem);
if (personality(current->personality) == PER_LINUX32)
err |= copy_to_user(&name->machine, "i686", 5);
return err ? -EFAULT : 0;
}
long sys_uname(struct old_utsname __user * name)
{
long err;
if (!name)
return -EFAULT;
down_read(&uts_sem);
err = copy_to_user(name, utsname(), sizeof (*name));
up_read(&uts_sem);
return err?-EFAULT:0;
}
/* TODO: intern string firstly */
static int kplib_kernel_v(ktap_state_t *ks)
{
ktap_str_t *ts = kp_str_newz(ks, utsname()->release);
if (unlikely(!ts))
return -1;
set_string(ks->top, ts);
incr_top(ks);
return 1;
}
/* TODO: Are these put_user calls OK? Should they pass an int?
* (I copied it from sys_i386.c like this.)
*/
static int hpux_uname(struct hpux_utsname __user *name)
{
int error;
if (!name)
return -EFAULT;
if (!access_ok(VERIFY_WRITE,name,sizeof(struct hpux_utsname)))
return -EFAULT;
down_read(&uts_sem);
error = __copy_to_user(&name->sysname, &utsname()->sysname,
HPUX_UTSLEN - 1);
error |= __put_user(0, name->sysname + HPUX_UTSLEN - 1);
error |= __copy_to_user(&name->nodename, &utsname()->nodename,
HPUX_UTSLEN - 1);
error |= __put_user(0, name->nodename + HPUX_UTSLEN - 1);
error |= __copy_to_user(&name->release, &utsname()->release,
HPUX_UTSLEN - 1);
error |= __put_user(0, name->release + HPUX_UTSLEN - 1);
error |= __copy_to_user(&name->version, &utsname()->version,
HPUX_UTSLEN - 1);
error |= __put_user(0, name->version + HPUX_UTSLEN - 1);
error |= __copy_to_user(&name->machine, &utsname()->machine,
HPUX_UTSLEN - 1);
error |= __put_user(0, name->machine + HPUX_UTSLEN - 1);
up_read(&uts_sem);
/* HP-UX utsname has no domainname field. */
/* TODO: Implement idnumber!!! */
#if 0
error |= __put_user(0,name->idnumber);
error |= __put_user(0,name->idnumber+HPUX_SNLEN-1);
#endif
error = error ? -EFAULT : 0;
return error;
}
static int v9fs_file_getlock(struct file *filp, struct file_lock *fl)
{
struct p9_getlock glock;
struct p9_fid *fid;
int res = 0;
fid = filp->private_data;
BUG_ON(fid == NULL);
posix_test_lock(filp, fl);
/*
* if we have a conflicting lock locally, no need to validate
* with server
*/
if (fl->fl_type != F_UNLCK)
return res;
/* convert posix lock to p9 tgetlock args */
memset(&glock, 0, sizeof(glock));
glock.type = P9_LOCK_TYPE_UNLCK;
glock.start = fl->fl_start;
if (fl->fl_end == OFFSET_MAX)
glock.length = 0;
else
glock.length = fl->fl_end - fl->fl_start + 1;
glock.proc_id = fl->fl_pid;
glock.client_id = utsname()->nodename;
res = p9_client_getlock_dotl(fid, &glock);
if (res < 0)
return res;
/* map 9p lock type to os lock type */
switch (glock.type) {
case P9_LOCK_TYPE_RDLCK:
fl->fl_type = F_RDLCK;
break;
case P9_LOCK_TYPE_WRLCK:
fl->fl_type = F_WRLCK;
break;
case P9_LOCK_TYPE_UNLCK:
fl->fl_type = F_UNLCK;
break;
}
if (glock.type != P9_LOCK_TYPE_UNLCK) {
fl->fl_start = glock.start;
if (glock.length == 0)
fl->fl_end = OFFSET_MAX;
else
fl->fl_end = glock.start + glock.length - 1;
fl->fl_pid = glock.proc_id;
}
return res;
}
int hpux_getdomainname(char __user *name, int len)
{
int nlen;
int err = -EFAULT;
down_read(&uts_sem);
nlen = strlen(utsname()->domainname) + 1;
if (nlen < len)
len = nlen;
if(len > __NEW_UTS_LEN)
goto done;
if(copy_to_user(name, utsname()->domainname, len))
goto done;
err = 0;
done:
up_read(&uts_sem);
return err;
}
asmlinkage int sys_getdomainname(char __user *name, int len)
{
int nlen, err;
if (len < 0)
return -EINVAL;
down_read(&uts_sem);
nlen = strlen(utsname()->domainname) + 1;
err = -EINVAL;
if (nlen > len)
goto out;
err = -EFAULT;
if (!copy_to_user(name, utsname()->domainname, nlen))
err = 0;
out:
up_read(&uts_sem);
return err;
}
/* TODO: better use MAC addresses (or motherboard IDs where available).
* Or, at least, some checks for MAC addresses should be recorded / added.
* When the nodename is misconfigured, data might be scrambled.
* MAC addresses should be more secure.
* In ideal case, further checks should be added to prohibit accidental
* name clashes.
*/
char *my_id(void)
{
struct new_utsname *u;
if (!id) {
//down_read(&uts_sem); // FIXME: this is currenty not EXPORTed from the kernel!
u = utsname();
if (u) {
id = brick_strdup(u->nodename);
}
//up_read(&uts_sem);
}
return id;
}
int data_init(void)
{
/* print information and return an error */
printk("arch Size: char short int long ptr long-long "
" u8 u16 u32 u64\n");
printk("%-12s %3i %3i %3i %3i %3i %3i "
"%3i %3i %3i %3i\n",
utsname()->machine,
(int)sizeof(char), (int)sizeof(short), (int)sizeof(int),
(int)sizeof(long),
(int)sizeof(void *), (int)sizeof(long long), (int)sizeof(__u8),
(int)sizeof(__u16), (int)sizeof(__u32), (int)sizeof(__u64));
return -ENODEV;
}
asmlinkage int solaris_utsname(u32 buf)
{
struct sol_utsname __user *v = A(buf);
int err;
/* Why should we not lie a bit? */
down_read(&uts_sem);
err = set_utsfield(v->sysname, "SunOS", 0, 0);
err |= set_utsfield(v->nodename, utsname()->nodename, 1, 1);
err |= set_utsfield(v->release, "5.6", 0, 0);
err |= set_utsfield(v->version, "Generic", 0, 0);
err |= set_utsfield(v->machine, machine(), 0, 0);
up_read(&uts_sem);
return (err ? -EFAULT : 0);
}
asmlinkage int solaris_sysinfo(int cmd, u32 buf, s32 count)
{
char *p, *q, *r;
char buffer[256];
int len;
/* Again, we cheat :)) */
switch (cmd) {
case SI_SYSNAME: r = "SunOS"; break;
case SI_HOSTNAME:
r = buffer + 256;
down_read(&uts_sem);
for (p = utsname()->nodename, q = buffer;
q < r && *p && *p != '.'; *q++ = *p++);
up_read(&uts_sem);
*q = 0;
r = buffer;
break;
case SI_RELEASE: r = "5.6"; break;
case SI_MACHINE: r = machine(); break;
case SI_ARCHITECTURE: r = "sparc"; break;
case SI_HW_PROVIDER: r = "Sun_Microsystems"; break;
case SI_HW_SERIAL: r = serial(buffer, sizeof(buffer)); break;
case SI_PLATFORM: r = platform(buffer, sizeof(buffer)); break;
case SI_SRPC_DOMAIN: r = ""; break;
case SI_VERSION: r = "Generic"; break;
default: return -EINVAL;
}
len = strlen(r) + 1;
if (count < len) {
if (copy_to_user(A(buf), r, count - 1) ||
__put_user(0, (char __user *)A(buf) + count - 1))
return -EFAULT;
} else {
if (copy_to_user(A(buf), r, len))
return -EFAULT;
}
return len;
}
static int data_init(void)
{
sys_uts = utsname();
/* print information and return an error */
printk("arch Align: char short int long ptr long-long "
" u8 u16 u32 u64\n");
printk("%-12s %3i %3i %3i %3i %3i %3i "
"%3i %3i %3i %3i\n",
sys_uts->machine,
/* note that gcc can subtract void * values, but it's not ansi */
(int)((void *)(&c.t) - (void *)&c),
(int)((void *)(&s.t) - (void *)&s),
(int)((void *)(&i.t) - (void *)&i),
(int)((void *)(&l.t) - (void *)&l),
(int)((void *)(&p.t) - (void *)&p),
(int)((void *)(&ll.t) - (void *)&ll),
(int)((void *)(&u1b.t) - (void *)&u1b),
(int)((void *)(&u2b.t) - (void *)&u2b),
(int)((void *)(&u4b.t) - (void *)&u4b),
(int)((void *)(&u8b.t) - (void *)&u8b));
// return err so module is automatically unloaded
return -ENODEV;
}
static int __init hello_init(void)
{
int i;
struct new_utsname *name;
name = utsname();
do_gettimeofday(&tv_init);
pr_alert("Version sysname %s, "
"nodename %s, "
"release %s, "
"version %s, "
"machine %s, "
"domainname %s\n",
name->sysname,
name->nodename,
name->release,
name->version,
name->machine,
name->domainname);
for (i = 0; i < howmany; i++)
pr_alert("%d/%d Test %s\n", i, howmany, message);
return 0;
}
int init_module(void)
{
struct cred credstruct;
struct vm_area_struct vmastruct;
struct dentry dentrystruct;
struct file filestruct;
struct thread_info threadinfostruct;
struct files_struct filesstruct; /* mind the extra 's' :-P */
struct fdtable fdtablestruct;
struct vfsmount vfsmountstruct;
struct task_struct *ts_p;
struct cred *cs_p;
struct mm_struct *mms_p;
struct vm_area_struct *vma_p;
struct dentry *ds_p;
struct file *fs_p;
struct fdtable *fdt_p;
struct thread_info *ti_p;
struct files_struct *fss_p;
struct vfsmount *vfsmnt_p;
ts_p = &init_task;
cs_p = &credstruct;
mms_p = init_task.mm;
vma_p = &vmastruct;
ds_p = &dentrystruct;
fs_p = &filestruct;
ti_p = &threadinfostruct;
fss_p = &filesstruct;
fdt_p = &fdtablestruct;
vfsmnt_p = &vfsmountstruct;
printk(KERN_INFO "--KERNELINFO-BEGIN--\n");
printk(KERN_INFO "name = %s %s\n", utsname()->version, utsname()->machine);
printk(KERN_INFO "task.size = %zu\n", sizeof(init_task));
printk(KERN_INFO "#task.init_addr = 0x%08lX\n", (unsigned long)ts_p);
printk(KERN_INFO "task.init_addr = %lu\n", (unsigned long)ts_p);
PRINT_OFFSET(ti_p, task, "task");
PRINT_OFFSET(ts_p, tasks, "task");
PRINT_OFFSET(ts_p, pid, "task");
PRINT_OFFSET(ts_p, tgid, "task");
PRINT_OFFSET(ts_p, group_leader, "task");
PRINT_OFFSET(ts_p, thread_group, "task");
PRINT_OFFSET(ts_p, real_parent, "task");
PRINT_OFFSET(ts_p, parent, "task");
PRINT_OFFSET(ts_p, mm, "task");
PRINT_OFFSET(ts_p, stack, "task");
PRINT_OFFSET(ts_p, real_cred, "task");
PRINT_OFFSET(ts_p, cred, "task");
PRINT_OFFSET(ts_p, comm, "task");
printk(KERN_INFO "task.comm_size = %zu\n", sizeof(ts_p->comm));
PRINT_OFFSET(ts_p, files, "task");
PRINT_OFFSET(cs_p, uid, "cred");
PRINT_OFFSET(cs_p, gid, "cred");
PRINT_OFFSET(cs_p, euid, "cred");
PRINT_OFFSET(cs_p, egid, "cred");
PRINT_OFFSET(mms_p, mmap, "mm");
PRINT_OFFSET(mms_p, pgd, "mm");
PRINT_OFFSET(mms_p, arg_start, "mm");
PRINT_OFFSET(mms_p, start_brk, "mm");
PRINT_OFFSET(mms_p, brk, "mm");
PRINT_OFFSET(mms_p, start_stack, "mm");
PRINT_OFFSET(vma_p, vm_mm, "vma");
PRINT_OFFSET(vma_p, vm_start, "vma");
PRINT_OFFSET(vma_p, vm_end, "vma");
PRINT_OFFSET(vma_p, vm_next, "vma");
PRINT_OFFSET(vma_p, vm_flags, "vma");
/* used in reading OsiModules */
PRINT_OFFSET(vma_p, vm_file, "vma");
PRINT_OFFSET(fs_p, f_path.dentry, "fs");
PRINT_OFFSET(fs_p, f_path.mnt, "fs");
PRINT_OFFSET(fs_p, f_pos, "fs");
PRINT_OFFSET(vfsmnt_p, mnt_parent, "fs");
PRINT_OFFSET(vfsmnt_p, mnt_mountpoint, "fs");
PRINT_OFFSET(vfsmnt_p, mnt_root, "fs"); /* XXX: We don't use this anywhere. Marked for removal. */
/* used in reading FDs */
PRINT_OFFSET(fss_p, fdt, "fs");
PRINT_OFFSET(fss_p, fdtab, "fs");
PRINT_OFFSET(fdt_p, fd, "fs");
PRINT_OFFSET(ds_p, d_name, "fs");
PRINT_OFFSET(ds_p, d_iname, "fs");
PRINT_OFFSET(ds_p, d_parent, "fs");
printk(KERN_INFO "---KERNELINFO-END---\n");
/* Return a failure. We only want to print the info. */
return -1;
}
/* format_corename will inspect the pattern parameter, and output a
* name into corename, which must have space for at least
* CORENAME_MAX_SIZE bytes plus one byte for the zero terminator.
*/
static int format_corename(struct core_name *cn, struct coredump_params *cprm)
{
const struct cred *cred = current_cred();
const char *pat_ptr = core_pattern;
int ispipe = (*pat_ptr == '|');
int pid_in_pattern = 0;
int err = 0;
cn->size = CORENAME_MAX_SIZE * atomic_read(&call_count);
cn->corename = kmalloc(cn->size, GFP_KERNEL);
cn->used = 0;
if (!cn->corename)
return -ENOMEM;
/* Repeat as long as we have more pattern to process and more output
space */
while (*pat_ptr) {
if (*pat_ptr != '%') {
if (*pat_ptr == 0)
goto out;
err = cn_printf(cn, "%c", *pat_ptr++);
} else {
switch (*++pat_ptr) {
/* single % at the end, drop that */
case 0:
goto out;
/* Double percent, output one percent */
case '%':
err = cn_printf(cn, "%c", '%');
break;
/* pid */
case 'p':
pid_in_pattern = 1;
err = cn_printf(cn, "%d",
task_tgid_vnr(current));
break;
/* uid */
case 'u':
err = cn_printf(cn, "%d", cred->uid);
break;
/* gid */
case 'g':
err = cn_printf(cn, "%d", cred->gid);
break;
case 'd':
err = cn_printf(cn, "%d",
__get_dumpable(cprm->mm_flags));
break;
/* signal that caused the coredump */
case 's':
err = cn_printf(cn, "%ld", cprm->siginfo->si_signo);
break;
/* UNIX time of coredump */
case 't': {
struct timeval tv;
do_gettimeofday(&tv);
err = cn_printf(cn, "%lu", tv.tv_sec);
break;
}
/* hostname */
case 'h': {
char *namestart = cn->corename + cn->used;
down_read(&uts_sem);
err = cn_printf(cn, "%s",
utsname()->nodename);
up_read(&uts_sem);
cn_escape(namestart);
break;
}
/* executable */
case 'e': {
char *commstart = cn->corename + cn->used;
err = cn_printf(cn, "%s", current->comm);
cn_escape(commstart);
break;
}
case 'E':
err = cn_print_exe_file(cn);
break;
/* core limit size */
case 'c':
err = cn_printf(cn, "%lu",
rlimit(RLIMIT_CORE));
break;
default:
break;
}
++pat_ptr;
}
if (err)
return err;
}
/* Backward compatibility with core_uses_pid:
*
* If core_pattern does not include a %p (as is the default)
* and core_uses_pid is set, then .%pid will be appended to
* the filename. Do not do this for piped commands. */
if (!ispipe && !pid_in_pattern && core_uses_pid) {
err = cn_printf(cn, ".%d", task_tgid_vnr(current));
if (err)
return err;
}
out:
return ispipe;
}
/*
* Generate the pool's configuration based on the current in-core state.
*
* We infer whether to generate a complete config or just one top-level config
* based on whether vd is the root vdev.
*/
nvlist_t *
spa_config_generate(spa_t *spa, vdev_t *vd, uint64_t txg, int getstats)
{
nvlist_t *config, *nvroot;
vdev_t *rvd = spa->spa_root_vdev;
unsigned long hostid = 0;
boolean_t locked = B_FALSE;
uint64_t split_guid;
char *pool_name;
if (vd == NULL) {
vd = rvd;
locked = B_TRUE;
spa_config_enter(spa, SCL_CONFIG | SCL_STATE, FTAG, RW_READER);
}
ASSERT(spa_config_held(spa, SCL_CONFIG | SCL_STATE, RW_READER) ==
(SCL_CONFIG | SCL_STATE));
/*
* If txg is -1, report the current value of spa->spa_config_txg.
*/
if (txg == -1ULL)
txg = spa->spa_config_txg;
/*
* Originally, users had to handle spa namespace collisions by either
* exporting the already imported pool or by specifying a new name for
* the pool with a conflicting name. In the case of root pools from
* virtual guests, neither approach to collision resolution is
* reasonable. This is addressed by extending the new name syntax with
* an option to specify that the new name is temporary. When specified,
* ZFS_IMPORT_TEMP_NAME will be set in spa->spa_import_flags to tell us
* to use the previous name, which we do below.
*/
if (spa->spa_import_flags & ZFS_IMPORT_TEMP_NAME) {
VERIFY0(nvlist_lookup_string(spa->spa_config,
ZPOOL_CONFIG_POOL_NAME, &pool_name));
} else
pool_name = spa_name(spa);
VERIFY(nvlist_alloc(&config, NV_UNIQUE_NAME, KM_SLEEP) == 0);
VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_VERSION,
spa_version(spa)) == 0);
VERIFY(nvlist_add_string(config, ZPOOL_CONFIG_POOL_NAME,
pool_name) == 0);
VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_STATE,
spa_state(spa)) == 0);
VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_TXG,
txg) == 0);
VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_GUID,
spa_guid(spa)) == 0);
VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_ERRATA,
spa->spa_errata) == 0);
VERIFY(spa->spa_comment == NULL || nvlist_add_string(config,
ZPOOL_CONFIG_COMMENT, spa->spa_comment) == 0);
#ifdef _KERNEL
hostid = zone_get_hostid(NULL);
#else /* _KERNEL */
/*
* We're emulating the system's hostid in userland, so we can't use
* zone_get_hostid().
*/
(void) ddi_strtoul(hw_serial, NULL, 10, &hostid);
#endif /* _KERNEL */
if (hostid != 0) {
VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_HOSTID,
hostid) == 0);
}
VERIFY0(nvlist_add_string(config, ZPOOL_CONFIG_HOSTNAME,
utsname()->nodename));
if (vd != rvd) {
VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_TOP_GUID,
vd->vdev_top->vdev_guid) == 0);
VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_GUID,
vd->vdev_guid) == 0);
if (vd->vdev_isspare)
VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_IS_SPARE,
1ULL) == 0);
if (vd->vdev_islog)
VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_IS_LOG,
1ULL) == 0);
vd = vd->vdev_top; /* label contains top config */
} else {
/*
* Only add the (potentially large) split information
* in the mos config, and not in the vdev labels
*/
if (spa->spa_config_splitting != NULL)
VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_SPLIT,
spa->spa_config_splitting) == 0);
}
/*
* Add the top-level config. We even add this on pools which
* don't support holes in the namespace.
*/
vdev_top_config_generate(spa, config);
/*
* If we're splitting, record the original pool's guid.
*/
if (spa->spa_config_splitting != NULL &&
nvlist_lookup_uint64(spa->spa_config_splitting,
ZPOOL_CONFIG_SPLIT_GUID, &split_guid) == 0) {
VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_SPLIT_GUID,
split_guid) == 0);
}
nvroot = vdev_config_generate(spa, vd, getstats, 0);
VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, nvroot) == 0);
nvlist_free(nvroot);
/*
* Store what's necessary for reading the MOS in the label.
*/
VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_FEATURES_FOR_READ,
spa->spa_label_features) == 0);
if (getstats && spa_load_state(spa) == SPA_LOAD_NONE) {
ddt_histogram_t *ddh;
ddt_stat_t *dds;
ddt_object_t *ddo;
ddh = kmem_zalloc(sizeof (ddt_histogram_t), KM_SLEEP);
ddt_get_dedup_histogram(spa, ddh);
VERIFY(nvlist_add_uint64_array(config,
ZPOOL_CONFIG_DDT_HISTOGRAM,
(uint64_t *)ddh, sizeof (*ddh) / sizeof (uint64_t)) == 0);
kmem_free(ddh, sizeof (ddt_histogram_t));
ddo = kmem_zalloc(sizeof (ddt_object_t), KM_SLEEP);
ddt_get_dedup_object_stats(spa, ddo);
VERIFY(nvlist_add_uint64_array(config,
ZPOOL_CONFIG_DDT_OBJ_STATS,
(uint64_t *)ddo, sizeof (*ddo) / sizeof (uint64_t)) == 0);
kmem_free(ddo, sizeof (ddt_object_t));
dds = kmem_zalloc(sizeof (ddt_stat_t), KM_SLEEP);
ddt_get_dedup_stats(spa, dds);
VERIFY(nvlist_add_uint64_array(config,
ZPOOL_CONFIG_DDT_STATS,
(uint64_t *)dds, sizeof (*dds) / sizeof (uint64_t)) == 0);
kmem_free(dds, sizeof (ddt_stat_t));
}
if (locked)
spa_config_exit(spa, SCL_CONFIG | SCL_STATE, FTAG);
return (config);
}
static int v9fs_file_do_lock(struct file *filp, int cmd, struct file_lock *fl)
{
struct p9_flock flock;
struct p9_fid *fid;
uint8_t status;
int res = 0;
unsigned char fl_type;
fid = filp->private_data;
BUG_ON(fid == NULL);
if ((fl->fl_flags & FL_POSIX) != FL_POSIX)
BUG();
res = posix_lock_file_wait(filp, fl);
if (res < 0)
goto out;
/* convert posix lock to p9 tlock args */
memset(&flock, 0, sizeof(flock));
/* map the lock type */
switch (fl->fl_type) {
case F_RDLCK:
flock.type = P9_LOCK_TYPE_RDLCK;
break;
case F_WRLCK:
flock.type = P9_LOCK_TYPE_WRLCK;
break;
case F_UNLCK:
flock.type = P9_LOCK_TYPE_UNLCK;
break;
}
flock.start = fl->fl_start;
if (fl->fl_end == OFFSET_MAX)
flock.length = 0;
else
flock.length = fl->fl_end - fl->fl_start + 1;
flock.proc_id = fl->fl_pid;
flock.client_id = utsname()->nodename;
if (IS_SETLKW(cmd))
flock.flags = P9_LOCK_FLAGS_BLOCK;
/*
* if its a blocked request and we get P9_LOCK_BLOCKED as the status
* for lock request, keep on trying
*/
for (;;) {
res = p9_client_lock_dotl(fid, &flock, &status);
if (res < 0)
break;
if (status != P9_LOCK_BLOCKED)
break;
if (status == P9_LOCK_BLOCKED && !IS_SETLKW(cmd))
break;
schedule_timeout_interruptible(P9_LOCK_TIMEOUT);
}
/* map 9p status to VFS status */
switch (status) {
case P9_LOCK_SUCCESS:
res = 0;
break;
case P9_LOCK_BLOCKED:
res = -EAGAIN;
break;
case P9_LOCK_ERROR:
case P9_LOCK_GRACE:
res = -ENOLCK;
break;
default:
BUG();
}
/*
* incase server returned error for lock request, revert
* it locally
*/
if (res < 0 && fl->fl_type != F_UNLCK) {
fl_type = fl->fl_type;
fl->fl_type = F_UNLCK;
res = posix_lock_file_wait(filp, fl);
fl->fl_type = fl_type;
}
out:
return res;
}
