Add hw_serial support based on a usermodehelper which runs
at spl module load time can calls hostid. The resolved hostid is then fed back in to a proc entry for latter use. It's not a pretty thing, but it will work for now. The hw_serial is required for things such as 'zpool status' to work. git-svn-id: https://outreach.scidac.gov/svn/spl/trunk@71 7e1ea52c-4ff2-0310-8f11-9dd32ca42a1c
This commit is contained in:
behlendo
parent
12ea923056
commit
f23e92fabf
@ -4,6 +4,7 @@
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#include <sys/kmem.h>
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#include <sys/debug.h>
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#include <linux/proc_fs.h>
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#include <linux/kmod.h>
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#include "config.h"
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/*
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@ -14,19 +15,23 @@ static spinlock_t spl_debug_lock = SPIN_LOCK_UNLOCKED;
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unsigned long spl_debug_mask = 0;
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unsigned long spl_debug_subsys = 0xff;
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unsigned long spl_hostid = 0;
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char hw_serial[11] = "<none>";
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EXPORT_SYMBOL(spl_debug_mask);
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EXPORT_SYMBOL(spl_debug_subsys);
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EXPORT_SYMBOL(spl_hostid);
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EXPORT_SYMBOL(hw_serial);
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static struct proc_dir_entry *spl_proc_root = NULL;
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static struct proc_dir_entry *spl_proc_debug_mask = NULL;
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static struct proc_dir_entry *spl_proc_debug_subsys = NULL;
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static struct proc_dir_entry *spl_proc_hostid = NULL;
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static struct proc_dir_entry *spl_proc_hw_serial = NULL;
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int p0 = 0;
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EXPORT_SYMBOL(p0);
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char hw_serial[11];
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EXPORT_SYMBOL(hw_serial);
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vmem_t *zio_alloc_arena = NULL;
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EXPORT_SYMBOL(zio_alloc_arena);
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@ -113,35 +118,68 @@ static int
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spl_proc_rd_generic_ul(char *page, char **start, off_t off,
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int count, int *eof, unsigned long val)
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{
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int rc;
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*start = page;
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*eof = 1;
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if (off || count > PAGE_SIZE)
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return 0;
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spin_lock(&spl_debug_lock);
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rc = snprintf(page, PAGE_SIZE, "0x%lx\n", val);
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spin_unlock(&spl_debug_lock);
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return rc;
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return snprintf(page, PAGE_SIZE, "0x%lx\n", val & 0xffffffff);
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}
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static int
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spl_proc_rd_debug_mask(char *page, char **start, off_t off,
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int count, int *eof, void *data)
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{
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return spl_proc_rd_generic_ul(page, start, off, count,
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int rc;
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spin_lock(&spl_debug_lock);
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rc = spl_proc_rd_generic_ul(page, start, off, count,
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eof, spl_debug_mask);
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spin_unlock(&spl_debug_lock);
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return rc;
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}
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static int
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spl_proc_rd_debug_subsys(char *page, char **start, off_t off,
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int count, int *eof, void *data)
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{
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return spl_proc_rd_generic_ul(page, start, off, count,
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int rc;
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spin_lock(&spl_debug_lock);
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rc = spl_proc_rd_generic_ul(page, start, off, count,
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eof, spl_debug_subsys);
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spin_unlock(&spl_debug_lock);
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return rc;
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}
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static int
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spl_proc_rd_hostid(char *page, char **start, off_t off,
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int count, int *eof, void *data)
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{
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*start = page;
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*eof = 1;
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if (off || count > PAGE_SIZE)
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return 0;
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return snprintf(page, PAGE_SIZE, "%lx\n", spl_hostid & 0xffffffff);
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}
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static int
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spl_proc_rd_hw_serial(char *page, char **start, off_t off,
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int count, int *eof, void *data)
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{
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*start = page;
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*eof = 1;
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if (off || count > PAGE_SIZE)
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return 0;
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strncpy(page, hw_serial, 11);
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return strlen(page);
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}
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static int
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@ -200,6 +238,23 @@ spl_proc_wr_debug_subsys(struct file *file, const char *ubuf,
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return count;
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}
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static int
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spl_proc_wr_hostid(struct file *file, const char *ubuf,
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unsigned long count, void *data, int mode)
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{
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unsigned long val;
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int rc;
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rc = spl_proc_wr_generic_ul(ubuf, count, &val, 16);
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if (rc)
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return rc;
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spl_hostid = val;
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sprintf(hw_serial, "%lu\n", ((long)val >= 0) ? val : -val);
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return count;
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}
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static struct proc_dir_entry *
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spl_register_proc_entry(const char *name, mode_t mode,
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struct proc_dir_entry *parent, void *data,
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@ -235,6 +290,15 @@ EXPORT_SYMBOL(spl_set_debug_subsys);
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static int __init spl_init(void)
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{
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int rc = 0;
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char sh_path[] = "/bin/sh";
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char *argv[] = { sh_path,
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"-c",
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"/usr/bin/hostid >/proc/spl/hostid",
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NULL };
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char *envp[] = { "HOME=/",
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"TERM=linux",
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"PATH=/sbin:/usr/sbin:/bin:/usr/bin",
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NULL };
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spl_proc_root = proc_mkdir("spl", NULL);
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if (!spl_proc_root) {
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@ -260,16 +324,49 @@ static int __init spl_init(void)
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goto out2;
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}
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spl_proc_hostid = spl_register_proc_entry("hostid", 0644,
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spl_proc_root, NULL,
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spl_proc_rd_hostid,
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spl_proc_wr_hostid);
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if (IS_ERR(spl_proc_hostid)) {
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rc = PTR_ERR(spl_proc_hostid);
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goto out3;
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}
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spl_proc_hw_serial = spl_register_proc_entry("hw_serial", 0444,
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spl_proc_root, NULL,
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spl_proc_rd_hw_serial,
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NULL);
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if (IS_ERR(spl_proc_hw_serial)) {
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rc = PTR_ERR(spl_proc_hw_serial);
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goto out4;
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}
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if ((rc = kmem_init()))
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goto out2;
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goto out4;
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if ((rc = vn_init()))
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goto out2;
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goto out4;
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/* Doing address resolution in the kernel is tricky and just
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* not a good idea in general. So to set the proper 'hw_serial'
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* use the usermodehelper support to ask '/bin/sh' to run
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* '/usr/bin/hostid' and redirect the result to /proc/spl/hostid
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* for us to use. It's a horific solution but it will do.
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*/
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if ((rc = call_usermodehelper(sh_path, argv, envp, 1)))
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goto out4;
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strcpy(hw_serial, "007f0100"); /* loopback */
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printk("spl: Loaded Solaris Porting Layer v%s\n", VERSION);
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return 0;
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out4:
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if (spl_proc_hw_serial)
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remove_proc_entry("hw_serial", spl_proc_root);
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out3:
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if (spl_proc_hostid)
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remove_proc_entry("hostid", spl_proc_root);
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out2:
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if (spl_proc_debug_mask)
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remove_proc_entry("debug_mask", spl_proc_root);
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@ -287,6 +384,8 @@ static void spl_fini(void)
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vn_fini();
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kmem_fini();
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remove_proc_entry("hw_serial", spl_proc_root);
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remove_proc_entry("hostid", spl_proc_root);
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remove_proc_entry("debug_subsys", spl_proc_root);
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remove_proc_entry("debug_mask", spl_proc_root);
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remove_proc_entry("spl", NULL);
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