#define DEBUG_SUBSYSTEM S_MDS
#include <linux/module.h>
+#include <linux/poll.h>
#include <obd.h>
#include <obd_class.h>
#include <lustre_ver.h>
#include <obd_support.h>
#include <lprocfs_status.h>
#include <lu_time.h>
-
+#include <lustre_log.h>
#include <lustre/lustre_idl.h>
+#include <libcfs/libcfs_string.h>
#include "mdd_internal.h"
rc = lu_time_init(&mdd->mdd_stats,
mdd->mdd_proc_entry,
mdd_counter_names, ARRAY_SIZE(mdd_counter_names));
+
EXIT;
out:
if (rc)
mdd_procfs_fini(mdd);
- return rc;
+ return rc;
}
int mdd_procfs_fini(struct mdd_device *mdd)
return snprintf(page, count, "%lu\n", mdd->mdd_atime_diff);
}
+
+/**** changelogs ****/
+DECLARE_CHANGELOG_NAMES;
+
+const char *changelog_bit2str(int bit)
+{
+ if (bit < CL_LAST)
+ return changelog_str[bit];
+ return NULL;
+}
+
+static int lprocfs_rd_changelog_mask(char *page, char **start, off_t off,
+ int count, int *eof, void *data)
+{
+ struct mdd_device *mdd = data;
+ int i = 0, rc = 0;
+
+ *eof = 1;
+ while (i < CL_LAST) {
+ if (mdd->mdd_cl.mc_mask & (1 << i))
+ rc += snprintf(page + rc, count - rc, "%s ",
+ changelog_str[i]);
+ i++;
+ }
+ return rc;
+}
+
+static int lprocfs_wr_changelog_mask(struct file *file, const char *buffer,
+ unsigned long count, void *data)
+{
+ struct mdd_device *mdd = data;
+ char *kernbuf;
+ int rc;
+ ENTRY;
+
+ if (count >= CFS_PAGE_SIZE)
+ RETURN(-EINVAL);
+ OBD_ALLOC(kernbuf, CFS_PAGE_SIZE);
+ if (kernbuf == NULL)
+ RETURN(-ENOMEM);
+ if (copy_from_user(kernbuf, buffer, count))
+ GOTO(out, rc = -EFAULT);
+ kernbuf[count] = 0;
+
+ rc = libcfs_str2mask(kernbuf, changelog_bit2str, &mdd->mdd_cl.mc_mask,
+ CHANGELOG_MINMASK, CHANGELOG_ALLMASK);
+ if (rc == 0)
+ rc = count;
+out:
+ OBD_FREE(kernbuf, CFS_PAGE_SIZE);
+ return rc;
+}
+
+struct cucb_data {
+ char *page;
+ int count;
+ int idx;
+};
+
+static int lprocfs_changelog_users_cb(struct llog_handle *llh,
+ struct llog_rec_hdr *hdr, void *data)
+{
+ struct llog_changelog_user_rec *rec;
+ struct cucb_data *cucb = (struct cucb_data *)data;
+
+ LASSERT(llh->lgh_hdr->llh_flags & LLOG_F_IS_PLAIN);
+
+ rec = (struct llog_changelog_user_rec *)hdr;
+
+ cucb->idx += snprintf(cucb->page + cucb->idx, cucb->count - cucb->idx,
+ CHANGELOG_USER_PREFIX"%-3d "LPU64"\n",
+ rec->cur_id, rec->cur_endrec);
+ if (cucb->idx >= cucb->count)
+ return -ENOSPC;
+
+ return 0;
+}
+
+static int lprocfs_rd_changelog_users(char *page, char **start, off_t off,
+ int count, int *eof, void *data)
+{
+ struct mdd_device *mdd = data;
+ struct llog_ctxt *ctxt;
+ struct cucb_data cucb;
+ __u64 cur;
+
+ *eof = 1;
+
+ ctxt = llog_get_context(mdd2obd_dev(mdd),LLOG_CHANGELOG_USER_ORIG_CTXT);
+ if (ctxt == NULL)
+ return -ENXIO;
+ LASSERT(ctxt->loc_handle->lgh_hdr->llh_flags & LLOG_F_IS_CAT);
+
+ spin_lock(&mdd->mdd_cl.mc_lock);
+ cur = mdd->mdd_cl.mc_index;
+ spin_unlock(&mdd->mdd_cl.mc_lock);
+
+ cucb.count = count;
+ cucb.page = page;
+ cucb.idx = 0;
+
+ cucb.idx += snprintf(cucb.page + cucb.idx, cucb.count - cucb.idx,
+ "current index: "LPU64"\n", cur);
+
+ cucb.idx += snprintf(cucb.page + cucb.idx, cucb.count - cucb.idx,
+ "%-5s %s\n", "ID", "index");
+
+ llog_cat_process(ctxt->loc_handle, lprocfs_changelog_users_cb,
+ &cucb, 0, 0);
+
+ llog_ctxt_put(ctxt);
+ return cucb.idx;
+}
+
+/* non-seq version for direct calling by class_process_proc_param */
+static int mdd_changelog_write(struct file *file, const char *buffer,
+ unsigned long count, void *data)
+{
+ struct mdd_device *mdd = (struct mdd_device *)data;
+ char kernbuf[32];
+ char *end;
+ int rc;
+
+ if (count > (sizeof(kernbuf) - 1))
+ goto out_usage;
+
+ count = min_t(unsigned long, count, sizeof(kernbuf));
+ if (copy_from_user(kernbuf, buffer, count))
+ return -EFAULT;
+
+ kernbuf[count] = '\0';
+ /* strip trailing newline from "echo blah" */
+ if (kernbuf[count - 1] == '\n')
+ kernbuf[count - 1] = '\0';
+
+ /* Forced on/off/purge rec, independent of changelog users! */
+ if (strcmp(kernbuf, "on") == 0) {
+ rc = mdd_changelog_on(mdd, 1);
+ } else if (strcmp(kernbuf, "off") == 0) {
+ rc = mdd_changelog_on(mdd, 0);
+ } else {
+ /* purge to an index */
+ long long unsigned endrec;
+
+ endrec = (long long)simple_strtoull(kernbuf, &end, 0);
+ if (end == kernbuf)
+ goto out_usage;
+
+ LCONSOLE_INFO("changelog purge to %llu\n", endrec);
+
+ rc = mdd_changelog_llog_cancel(mdd, endrec);
+ }
+
+ if (rc < 0)
+ return rc;
+ return count;
+
+out_usage:
+ CWARN("changelog write usage: [on|off] | <purge_idx (0=all)>\n");
+ return -EINVAL;
+}
+
+static ssize_t mdd_changelog_seq_write(struct file *file, const char *buffer,
+ size_t count, loff_t *off)
+{
+ struct seq_file *seq = file->private_data;
+ struct changelog_seq_iter *csi = seq->private;
+ struct mdd_device *mdd = (struct mdd_device *)csi->csi_dev;
+
+ return mdd_changelog_write(file, buffer, count, mdd);
+}
+
+static int mdd_changelog_done(struct changelog_seq_iter *csi)
+{
+ struct mdd_device *mdd = (struct mdd_device *)csi->csi_dev;
+ int done = 0;
+
+ spin_lock(&mdd->mdd_cl.mc_lock);
+ done = (csi->csi_endrec >= mdd->mdd_cl.mc_index);
+ spin_unlock(&mdd->mdd_cl.mc_lock);
+ return done;
+}
+
+/* handle nonblocking */
+static ssize_t mdd_changelog_seq_read(struct file *file, char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ struct seq_file *seq = (struct seq_file *)file->private_data;
+ struct changelog_seq_iter *csi = seq->private;
+ int rc;
+ ENTRY;
+
+ if ((file->f_flags & O_NONBLOCK) && mdd_changelog_done(csi))
+ RETURN(-EAGAIN);
+
+ csi->csi_done = 0;
+ rc = seq_read(file, buf, count, ppos);
+ RETURN(rc);
+}
+
+/* handle nonblocking */
+static unsigned int mdd_changelog_seq_poll(struct file *file, poll_table *wait)
+{
+ struct seq_file *seq = (struct seq_file *)file->private_data;
+ struct changelog_seq_iter *csi = seq->private;
+ struct mdd_device *mdd = (struct mdd_device *)csi->csi_dev;
+ ENTRY;
+
+ csi->csi_done = 0;
+ poll_wait(file, &mdd->mdd_cl.mc_waitq, wait);
+ if (!mdd_changelog_done(csi))
+ RETURN(POLLIN | POLLRDNORM);
+
+ RETURN(0);
+}
+
+static int mdd_changelog_seq_open(struct inode *inode, struct file *file)
+{
+ struct changelog_seq_iter *csi;
+ struct obd_device *obd;
+ int rc;
+ ENTRY;
+
+ rc = changelog_seq_open(inode, file, &csi);
+ if (rc)
+ RETURN(rc);
+
+ /* The proc file is set up with mdd in data, not obd */
+ obd = mdd2obd_dev((struct mdd_device *)csi->csi_dev);
+ csi->csi_ctxt = llog_get_context(obd, LLOG_CHANGELOG_ORIG_CTXT);
+ if (csi->csi_ctxt == NULL) {
+ changelog_seq_release(inode, file);
+ RETURN(-ENOENT);
+ }
+ /* The handle is set up in llog_obd_origin_setup */
+ csi->csi_llh = csi->csi_ctxt->loc_handle;
+ RETURN(rc);
+}
+
+static int mdd_changelog_seq_release(struct inode *inode, struct file *file)
+{
+ struct seq_file *seq = file->private_data;
+ struct changelog_seq_iter *csi = seq->private;
+
+ if (csi && csi->csi_ctxt)
+ llog_ctxt_put(csi->csi_ctxt);
+
+ return (changelog_seq_release(inode, file));
+}
+
+/* mdd changelog proc can handle nonblocking ops and writing to purge recs */
+struct file_operations mdd_changelog_fops = {
+ .owner = THIS_MODULE,
+ .open = mdd_changelog_seq_open,
+ .read = mdd_changelog_seq_read,
+ .write = mdd_changelog_seq_write,
+ .llseek = changelog_seq_lseek,
+ .poll = mdd_changelog_seq_poll,
+ .release = mdd_changelog_seq_release,
+};
+
#ifdef HAVE_QUOTA_SUPPORT
static int mdd_lprocfs_quota_rd_type(char *page, char **start, off_t off,
int count, int *eof, void *data)
#endif
static struct lprocfs_vars lprocfs_mdd_obd_vars[] = {
- { "atime_diff", lprocfs_rd_atime_diff, lprocfs_wr_atime_diff, 0 },
+ { "atime_diff", lprocfs_rd_atime_diff, lprocfs_wr_atime_diff, 0 },
+ { "changelog_mask", lprocfs_rd_changelog_mask,
+ lprocfs_wr_changelog_mask, 0 },
+ { "changelog_users", lprocfs_rd_changelog_users, 0, 0},
+ { "changelog", 0, mdd_changelog_write, 0, &mdd_changelog_fops, 0600 },
#ifdef HAVE_QUOTA_SUPPORT
{ "quota_type", mdd_lprocfs_quota_rd_type,
mdd_lprocfs_quota_wr_type, 0 },
lvars->module_vars = lprocfs_mdd_module_vars;
lvars->obd_vars = lprocfs_mdd_obd_vars;
}
+