X-Git-Url: https://git.whamcloud.com/?a=blobdiff_plain;f=lustre%2Fmdd%2Fmdd_lproc.c;h=903a6754918581a72777ba331155d41bda3d8482;hb=e9b311378cf25aeb46658f3240214bd98d45fd93;hp=2d8bc678e398dcf188dc6859c82b4a45b6453e64;hpb=6869932b552ac705f411de3362f01bd50c1f6f7d;p=fs%2Flustre-release.git

diff --git a/lustre/mdd/mdd_lproc.c b/lustre/mdd/mdd_lproc.c
index 2d8bc67..903a675 100644
--- a/lustre/mdd/mdd_lproc.c
+++ b/lustre/mdd/mdd_lproc.c
@@ -46,14 +46,16 @@
 #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"
 
@@ -88,11 +90,12 @@ int mdd_procfs_init(struct mdd_device *mdd, const char *name)
         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)
@@ -150,8 +153,294 @@ static int lprocfs_rd_atime_diff(char *page, char **start, off_t off,
         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)
+{
+        struct mdd_device *mdd = data;
+        return lprocfs_quota_rd_type(page, start, off, count, eof,
+                                     mdd->mdd_obd_dev);
+}
+
+static int mdd_lprocfs_quota_wr_type(struct file *file, const char *buffer,
+                                     unsigned long count, void *data)
+{
+        struct mdd_device *mdd = data;
+        return lprocfs_quota_wr_type(file, buffer, count, mdd->mdd_obd_dev);
+}
+#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 },
+#endif
         { 0 }
 };
 
@@ -165,3 +454,4 @@ void lprocfs_mdd_init_vars(struct lprocfs_static_vars *lvars)
         lvars->module_vars  = lprocfs_mdd_module_vars;
         lvars->obd_vars     = lprocfs_mdd_obd_vars;
 }
+