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path: root/fs/nfs/objlayout/objlayout.c
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Diffstat (limited to 'fs/nfs/objlayout/objlayout.c')
-rw-r--r--fs/nfs/objlayout/objlayout.c142
1 files changed, 138 insertions, 4 deletions
diff --git a/fs/nfs/objlayout/objlayout.c b/fs/nfs/objlayout/objlayout.c
index b3c29039f5b8..8d45f1c318ce 100644
--- a/fs/nfs/objlayout/objlayout.c
+++ b/fs/nfs/objlayout/objlayout.c
@@ -37,6 +37,9 @@
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
+#include <linux/kmod.h>
+#include <linux/moduleparam.h>
+#include <linux/ratelimit.h>
#include <scsi/osd_initiator.h>
#include "objlayout.h"
@@ -156,7 +159,7 @@ last_byte_offset(u64 start, u64 len)
return end > start ? end - 1 : NFS4_MAX_UINT64;
}
-void _fix_verify_io_params(struct pnfs_layout_segment *lseg,
+static void _fix_verify_io_params(struct pnfs_layout_segment *lseg,
struct page ***p_pages, unsigned *p_pgbase,
u64 offset, unsigned long count)
{
@@ -490,9 +493,9 @@ encode_accumulated_error(struct objlayout *objlay, __be32 *p)
if (!ioerr->oer_errno)
continue;
- printk(KERN_ERR "%s: err[%d]: errno=%d is_write=%d "
- "dev(%llx:%llx) par=0x%llx obj=0x%llx "
- "offset=0x%llx length=0x%llx\n",
+ printk(KERN_ERR "NFS: %s: err[%d]: errno=%d "
+ "is_write=%d dev(%llx:%llx) par=0x%llx "
+ "obj=0x%llx offset=0x%llx length=0x%llx\n",
__func__, i, ioerr->oer_errno,
ioerr->oer_iswrite,
_DEVID_LO(&ioerr->oer_component.oid_device_id),
@@ -651,3 +654,134 @@ void objlayout_put_deviceinfo(struct pnfs_osd_deviceaddr *deviceaddr)
__free_page(odi->page);
kfree(odi);
}
+
+enum {
+ OBJLAYOUT_MAX_URI_LEN = 256, OBJLAYOUT_MAX_OSDNAME_LEN = 64,
+ OBJLAYOUT_MAX_SYSID_HEX_LEN = OSD_SYSTEMID_LEN * 2 + 1,
+ OSD_LOGIN_UPCALL_PATHLEN = 256
+};
+
+static char osd_login_prog[OSD_LOGIN_UPCALL_PATHLEN] = "/sbin/osd_login";
+
+module_param_string(osd_login_prog, osd_login_prog, sizeof(osd_login_prog),
+ 0600);
+MODULE_PARM_DESC(osd_login_prog, "Path to the osd_login upcall program");
+
+struct __auto_login {
+ char uri[OBJLAYOUT_MAX_URI_LEN];
+ char osdname[OBJLAYOUT_MAX_OSDNAME_LEN];
+ char systemid_hex[OBJLAYOUT_MAX_SYSID_HEX_LEN];
+};
+
+static int __objlayout_upcall(struct __auto_login *login)
+{
+ static char *envp[] = { "HOME=/",
+ "TERM=linux",
+ "PATH=/sbin:/usr/sbin:/bin:/usr/bin",
+ NULL
+ };
+ char *argv[8];
+ int ret;
+
+ if (unlikely(!osd_login_prog[0])) {
+ dprintk("%s: osd_login_prog is disabled\n", __func__);
+ return -EACCES;
+ }
+
+ dprintk("%s uri: %s\n", __func__, login->uri);
+ dprintk("%s osdname %s\n", __func__, login->osdname);
+ dprintk("%s systemid_hex %s\n", __func__, login->systemid_hex);
+
+ argv[0] = (char *)osd_login_prog;
+ argv[1] = "-u";
+ argv[2] = login->uri;
+ argv[3] = "-o";
+ argv[4] = login->osdname;
+ argv[5] = "-s";
+ argv[6] = login->systemid_hex;
+ argv[7] = NULL;
+
+ ret = call_usermodehelper(argv[0], argv, envp, UMH_WAIT_PROC);
+ /*
+ * Disable the upcall mechanism if we're getting an ENOENT or
+ * EACCES error. The admin can re-enable it on the fly by using
+ * sysfs to set the objlayoutdriver.osd_login_prog module parameter once
+ * the problem has been fixed.
+ */
+ if (ret == -ENOENT || ret == -EACCES) {
+ printk(KERN_ERR "PNFS-OBJ: %s was not found please set "
+ "objlayoutdriver.osd_login_prog kernel parameter!\n",
+ osd_login_prog);
+ osd_login_prog[0] = '\0';
+ }
+ dprintk("%s %s return value: %d\n", __func__, osd_login_prog, ret);
+
+ return ret;
+}
+
+/* Assume dest is all zeros */
+static void __copy_nfsS_and_zero_terminate(struct nfs4_string s,
+ char *dest, int max_len,
+ const char *var_name)
+{
+ if (!s.len)
+ return;
+
+ if (s.len >= max_len) {
+ pr_warn_ratelimited(
+ "objlayout_autologin: %s: s.len(%d) >= max_len(%d)",
+ var_name, s.len, max_len);
+ s.len = max_len - 1; /* space for null terminator */
+ }
+
+ memcpy(dest, s.data, s.len);
+}
+
+/* Assume sysid is all zeros */
+static void _sysid_2_hex(struct nfs4_string s,
+ char sysid[OBJLAYOUT_MAX_SYSID_HEX_LEN])
+{
+ int i;
+ char *cur;
+
+ if (!s.len)
+ return;
+
+ if (s.len != OSD_SYSTEMID_LEN) {
+ pr_warn_ratelimited(
+ "objlayout_autologin: systemid_len(%d) != OSD_SYSTEMID_LEN",
+ s.len);
+ if (s.len > OSD_SYSTEMID_LEN)
+ s.len = OSD_SYSTEMID_LEN;
+ }
+
+ cur = sysid;
+ for (i = 0; i < s.len; i++)
+ cur = hex_byte_pack(cur, s.data[i]);
+}
+
+int objlayout_autologin(struct pnfs_osd_deviceaddr *deviceaddr)
+{
+ int rc;
+ struct __auto_login login;
+
+ if (!deviceaddr->oda_targetaddr.ota_netaddr.r_addr.len)
+ return -ENODEV;
+
+ memset(&login, 0, sizeof(login));
+ __copy_nfsS_and_zero_terminate(
+ deviceaddr->oda_targetaddr.ota_netaddr.r_addr,
+ login.uri, sizeof(login.uri), "URI");
+
+ __copy_nfsS_and_zero_terminate(
+ deviceaddr->oda_osdname,
+ login.osdname, sizeof(login.osdname), "OSDNAME");
+
+ _sysid_2_hex(deviceaddr->oda_systemid, login.systemid_hex);
+
+ rc = __objlayout_upcall(&login);
+ if (rc > 0) /* script returns positive values */
+ rc = -ENODEV;
+
+ return rc;
+}