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@@ -37,6 +37,9 @@
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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+#include <linux/kmod.h>
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+#include <linux/moduleparam.h>
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+#include <linux/ratelimit.h>
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#include <scsi/osd_initiator.h>
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#include "objlayout.h"
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@@ -651,3 +654,134 @@ void objlayout_put_deviceinfo(struct pnfs_osd_deviceaddr *deviceaddr)
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__free_page(odi->page);
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kfree(odi);
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}
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+
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+enum {
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+ OBJLAYOUT_MAX_URI_LEN = 256, OBJLAYOUT_MAX_OSDNAME_LEN = 64,
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+ OBJLAYOUT_MAX_SYSID_HEX_LEN = OSD_SYSTEMID_LEN * 2 + 1,
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+ OSD_LOGIN_UPCALL_PATHLEN = 256
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+};
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+
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+static char osd_login_prog[OSD_LOGIN_UPCALL_PATHLEN] = "/sbin/osd_login";
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+
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+module_param_string(osd_login_prog, osd_login_prog, sizeof(osd_login_prog),
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+ 0600);
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+MODULE_PARM_DESC(osd_login_prog, "Path to the osd_login upcall program");
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+
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+struct __auto_login {
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+ char uri[OBJLAYOUT_MAX_URI_LEN];
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+ char osdname[OBJLAYOUT_MAX_OSDNAME_LEN];
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+ char systemid_hex[OBJLAYOUT_MAX_SYSID_HEX_LEN];
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+};
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+
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+static int __objlayout_upcall(struct __auto_login *login)
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+{
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+ static 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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+ };
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+ char *argv[8];
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+ int ret;
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+
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+ if (unlikely(!osd_login_prog[0])) {
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+ dprintk("%s: osd_login_prog is disabled\n", __func__);
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+ return -EACCES;
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+ }
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+
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+ dprintk("%s uri: %s\n", __func__, login->uri);
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+ dprintk("%s osdname %s\n", __func__, login->osdname);
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+ dprintk("%s systemid_hex %s\n", __func__, login->systemid_hex);
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+
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+ argv[0] = (char *)osd_login_prog;
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+ argv[1] = "-u";
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+ argv[2] = login->uri;
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+ argv[3] = "-o";
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+ argv[4] = login->osdname;
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+ argv[5] = "-s";
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+ argv[6] = login->systemid_hex;
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+ argv[7] = NULL;
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+
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+ ret = call_usermodehelper(argv[0], argv, envp, UMH_WAIT_PROC);
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+ /*
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+ * Disable the upcall mechanism if we're getting an ENOENT or
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+ * EACCES error. The admin can re-enable it on the fly by using
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+ * sysfs to set the objlayoutdriver.osd_login_prog module parameter once
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+ * the problem has been fixed.
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+ */
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+ if (ret == -ENOENT || ret == -EACCES) {
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+ printk(KERN_ERR "PNFS-OBJ: %s was not found please set "
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+ "objlayoutdriver.osd_login_prog kernel parameter!\n",
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+ osd_login_prog);
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+ osd_login_prog[0] = '\0';
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+ }
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+ dprintk("%s %s return value: %d\n", __func__, osd_login_prog, ret);
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+
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+ return ret;
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+}
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+
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+/* Assume dest is all zeros */
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+static void __copy_nfsS_and_zero_terminate(struct nfs4_string s,
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+ char *dest, int max_len,
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+ const char *var_name)
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+{
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+ if (!s.len)
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+ return;
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+
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+ if (s.len >= max_len) {
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+ pr_warn_ratelimited(
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+ "objlayout_autologin: %s: s.len(%d) >= max_len(%d)",
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+ var_name, s.len, max_len);
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+ s.len = max_len - 1; /* space for null terminator */
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+ }
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+
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+ memcpy(dest, s.data, s.len);
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+}
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+
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+/* Assume sysid is all zeros */
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+static void _sysid_2_hex(struct nfs4_string s,
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+ char sysid[OBJLAYOUT_MAX_SYSID_HEX_LEN])
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+{
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+ int i;
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+ char *cur;
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+
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+ if (!s.len)
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+ return;
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+
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+ if (s.len != OSD_SYSTEMID_LEN) {
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+ pr_warn_ratelimited(
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+ "objlayout_autologin: systemid_len(%d) != OSD_SYSTEMID_LEN",
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+ s.len);
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+ if (s.len > OSD_SYSTEMID_LEN)
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+ s.len = OSD_SYSTEMID_LEN;
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+ }
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+
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+ cur = sysid;
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+ for (i = 0; i < s.len; i++)
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+ cur = hex_byte_pack(cur, s.data[i]);
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+}
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+
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+int objlayout_autologin(struct pnfs_osd_deviceaddr *deviceaddr)
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+{
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+ int rc;
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+ struct __auto_login login;
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+
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+ if (!deviceaddr->oda_targetaddr.ota_netaddr.r_addr.len)
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+ return -ENODEV;
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+
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+ memset(&login, 0, sizeof(login));
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+ __copy_nfsS_and_zero_terminate(
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+ deviceaddr->oda_targetaddr.ota_netaddr.r_addr,
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+ login.uri, sizeof(login.uri), "URI");
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+
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+ __copy_nfsS_and_zero_terminate(
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+ deviceaddr->oda_osdname,
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+ login.osdname, sizeof(login.osdname), "OSDNAME");
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+
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+ _sysid_2_hex(deviceaddr->oda_systemid, login.systemid_hex);
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+
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+ rc = __objlayout_upcall(&login);
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+ if (rc > 0) /* script returns positive values */
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+ rc = -ENODEV;
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+
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+ return rc;
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+}
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Sachin Bhamare