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LU-7156 mdd: add changelog_size to procfs
[fs/lustre-release.git] / lustre / mdt / mdt_hsm_cdt_actions.c
index e1be046..5c5f254 100644 (file)
  * (C) Copyright 2012 Commissariat a l'energie atomique et aux energies
  *     alternatives
  *
+ * Copyright (c) 2013, 2014, Intel Corporation.
  */
 /*
- * lustre/mdt/mdt_agent_actions.c
+ * lustre/mdt/mdt_hsm_cdt_actions.c
  *
  * Lustre HSM
  *
@@ -161,7 +162,7 @@ int mdt_agent_record_add(const struct lu_env *env,
                hai->hai_cookie = cdt->cdt_last_cookie;
        }
        larr->arr_hai.hai_cookie = hai->hai_cookie;
-       rc = llog_cat_add(env, lctxt->loc_handle, &larr->arr_hdr, NULL, NULL);
+       rc = llog_cat_add(env, lctxt->loc_handle, &larr->arr_hdr, NULL);
        if (rc > 0)
                rc = 0;
 
@@ -313,7 +314,7 @@ int mdt_agent_llog_update_rec(const struct lu_env *env,
        larr->arr_hdr.lrh_id = 0;
        larr->arr_hdr.lrh_index = 0;
        rc = llog_cat_add(env, llh->u.phd.phd_cat_handle, &larr->arr_hdr,
-                         NULL, NULL);
+                         NULL);
        larr->arr_hdr = saved_hdr;
        RETURN(rc);
 }
@@ -339,7 +340,7 @@ struct agent_action_iterator {
        int                      aai_magic;      /**< magic number */
        bool                     aai_eof;        /**< all done */
        struct lu_env            aai_env;        /**< lustre env for llog */
-       struct obd_device       *aai_obd;        /**< metadata device */
+       struct mdt_device       *aai_mdt;        /**< metadata device */
        struct llog_ctxt        *aai_ctxt;       /**< llog context */
        int                      aai_cat_index;  /**< cata idx already shown */
        int                      aai_index;      /**< idx in cata shown */
@@ -349,21 +350,22 @@ struct agent_action_iterator {
  * seq_file method called to start access to /proc file
  * get llog context + llog handle
  */
-static void *mdt_agent_actions_proc_start(struct seq_file *s, loff_t *pos)
+static void *mdt_hsm_actions_proc_start(struct seq_file *s, loff_t *pos)
 {
        struct agent_action_iterator    *aai = s->private;
        ENTRY;
 
-       LASSERTF(aai->aai_magic == AGENT_ACTIONS_IT_MAGIC, "%08X",
+       LASSERTF(aai->aai_magic == AGENT_ACTIONS_IT_MAGIC, "%08X\n",
                 aai->aai_magic);
 
-       aai->aai_ctxt = llog_get_context(aai->aai_obd, LLOG_AGENT_ORIG_CTXT);
+       aai->aai_ctxt = llog_get_context(mdt2obd_dev(aai->aai_mdt),
+                                        LLOG_AGENT_ORIG_CTXT);
        if (aai->aai_ctxt == NULL || aai->aai_ctxt->loc_handle == NULL) {
                CERROR("llog_get_context() failed\n");
                RETURN(ERR_PTR(-ENOENT));
        }
 
-       CDEBUG(D_HSM, "llog succesfully initialized, start from "LPD64"\n",
+       CDEBUG(D_HSM, "llog successfully initialized, start from "LPD64"\n",
               *pos);
        /* first call = rewind */
        if (*pos == 0) {
@@ -379,7 +381,7 @@ static void *mdt_agent_actions_proc_start(struct seq_file *s, loff_t *pos)
        RETURN(aai);
 }
 
-static void *mdt_agent_actions_proc_next(struct seq_file *s, void *v,
+static void *mdt_hsm_actions_proc_next(struct seq_file *s, void *v,
                                         loff_t *pos)
 {
        RETURN(NULL);
@@ -388,7 +390,7 @@ static void *mdt_agent_actions_proc_next(struct seq_file *s, void *v,
 /**
  *  llog_cat_process() callback, used to fill a seq_file buffer
  */
-static int agent_actions_show_cb(const struct lu_env *env,
+static int hsm_actions_show_cb(const struct lu_env *env,
                                 struct llog_handle *llh,
                                 struct llog_rec_hdr *hdr,
                                 void *data)
@@ -396,13 +398,13 @@ static int agent_actions_show_cb(const struct lu_env *env,
        struct llog_agent_req_rec    *larr = (struct llog_agent_req_rec *)hdr;
        struct seq_file              *s = data;
        struct agent_action_iterator *aai;
-       int                           rc, sz;
+       int                           sz;
        size_t                        count;
        char                          buf[12];
        ENTRY;
 
        aai = s->private;
-       LASSERTF(aai->aai_magic == AGENT_ACTIONS_IT_MAGIC, "%08X",
+       LASSERTF(aai->aai_magic == AGENT_ACTIONS_IT_MAGIC, "%08X\n",
                 aai->aai_magic);
 
        /* if rec already printed => skip */
@@ -415,49 +417,44 @@ static int agent_actions_show_cb(const struct lu_env *env,
 
        count = s->count;
        sz = larr->arr_hai.hai_len - sizeof(larr->arr_hai);
-       rc = seq_printf(s, "lrh=[type=%X len=%d idx=%d/%d] fid="DFID
-                       " dfid="DFID
-                       " compound/cookie="LPX64"/"LPX64
-                       " action=%s archive#=%d flags="LPX64
-                       " extent="LPX64"-"LPX64
-                       " gid="LPX64" datalen=%d status=%s"
-                       " data=[%s]\n",
-                       hdr->lrh_type, hdr->lrh_len,
-                       llh->lgh_hdr->llh_cat_idx, hdr->lrh_index,
-                       PFID(&larr->arr_hai.hai_fid),
-                       PFID(&larr->arr_hai.hai_dfid),
-                       larr->arr_compound_id, larr->arr_hai.hai_cookie,
-                       hsm_copytool_action2name(larr->arr_hai.hai_action),
-                       larr->arr_archive_id,
-                       larr->arr_flags,
-                       larr->arr_hai.hai_extent.offset,
-                       larr->arr_hai.hai_extent.length,
-                       larr->arr_hai.hai_gid, sz,
-                       agent_req_status2name(larr->arr_status),
-                       hai_dump_data_field(&larr->arr_hai, buf, sizeof(buf)));
-       if (rc == 0) {
-               aai->aai_cat_index = llh->lgh_hdr->llh_cat_idx;
-               aai->aai_index = hdr->lrh_index;
-       } else {
-               if (s->count == s->size && count > 0) /* rewind the buffer */
-                       s->count = count;
-               rc = LLOG_PROC_BREAK;
-       }
-       RETURN(rc);
+       seq_printf(s, "lrh=[type=%X len=%d idx=%d/%d] fid="DFID
+                  " dfid="DFID" compound/cookie="LPX64"/"LPX64
+                  " action=%s archive#=%d flags="LPX64
+                  " extent="LPX64"-"LPX64
+                  " gid="LPX64" datalen=%d status=%s data=[%s]\n",
+                  hdr->lrh_type, hdr->lrh_len,
+                  llh->lgh_hdr->llh_cat_idx, hdr->lrh_index,
+                  PFID(&larr->arr_hai.hai_fid),
+                  PFID(&larr->arr_hai.hai_dfid),
+                  larr->arr_compound_id, larr->arr_hai.hai_cookie,
+                  hsm_copytool_action2name(larr->arr_hai.hai_action),
+                  larr->arr_archive_id,
+                  larr->arr_flags,
+                  larr->arr_hai.hai_extent.offset,
+                  larr->arr_hai.hai_extent.length,
+                  larr->arr_hai.hai_gid, sz,
+                  agent_req_status2name(larr->arr_status),
+                  hai_dump_data_field(&larr->arr_hai, buf, sizeof(buf)));
+
+       aai->aai_cat_index = llh->lgh_hdr->llh_cat_idx;
+       aai->aai_index = hdr->lrh_index;
+
+       RETURN(0);
 }
 
 /**
- * mdt_agent_actions_proc_show() is called at for each seq record
+ * mdt_hsm_actions_proc_show() is called at for each seq record
  * process the llog, with a cb which fill the file_seq buffer
  * to be faster, one show will fill multiple records
  */
-static int mdt_agent_actions_proc_show(struct seq_file *s, void *v)
+static int mdt_hsm_actions_proc_show(struct seq_file *s, void *v)
 {
        struct agent_action_iterator    *aai = s->private;
+       struct coordinator              *cdt = &aai->aai_mdt->mdt_coordinator;
        int                              rc;
        ENTRY;
 
-       LASSERTF(aai->aai_magic == AGENT_ACTIONS_IT_MAGIC, "%08X",
+       LASSERTF(aai->aai_magic == AGENT_ACTIONS_IT_MAGIC, "%08X\n",
                 aai->aai_magic);
 
        CDEBUG(D_HSM, "show from cat %d index %d eof=%d\n",
@@ -465,9 +462,11 @@ static int mdt_agent_actions_proc_show(struct seq_file *s, void *v)
        if (aai->aai_eof)
                RETURN(0);
 
+       mutex_lock(&cdt->cdt_llog_lock);
        rc = llog_cat_process(&aai->aai_env, aai->aai_ctxt->loc_handle,
-                             agent_actions_show_cb, s,
-                             aai->aai_cat_index, aai->aai_index + 1);
+                             hsm_actions_show_cb, s,
+                             aai->aai_cat_index, aai->aai_index);
+       mutex_unlock(&cdt->cdt_llog_lock);
        if (rc == 0) /* all llog parsed */
                aai->aai_eof = true;
        if (rc == LLOG_PROC_BREAK) /* buffer full */
@@ -479,12 +478,12 @@ static int mdt_agent_actions_proc_show(struct seq_file *s, void *v)
  * seq_file method called to stop access to /proc file
  * clean + put llog context
  */
-static void mdt_agent_actions_proc_stop(struct seq_file *s, void *v)
+static void mdt_hsm_actions_proc_stop(struct seq_file *s, void *v)
 {
        struct agent_action_iterator *aai = s->private;
        ENTRY;
 
-       LASSERTF(aai->aai_magic == AGENT_ACTIONS_IT_MAGIC, "%08X",
+       LASSERTF(aai->aai_magic == AGENT_ACTIONS_IT_MAGIC, "%08X\n",
                 aai->aai_magic);
 
        if (aai->aai_ctxt)
@@ -494,14 +493,14 @@ static void mdt_agent_actions_proc_stop(struct seq_file *s, void *v)
        return;
 }
 
-static const struct seq_operations mdt_agent_actions_proc_ops = {
-       .start  = mdt_agent_actions_proc_start,
-       .next   = mdt_agent_actions_proc_next,
-       .show   = mdt_agent_actions_proc_show,
-       .stop   = mdt_agent_actions_proc_stop,
+static const struct seq_operations mdt_hsm_actions_proc_ops = {
+       .start  = mdt_hsm_actions_proc_start,
+       .next   = mdt_hsm_actions_proc_next,
+       .show   = mdt_hsm_actions_proc_show,
+       .stop   = mdt_hsm_actions_proc_stop,
 };
 
-static int lprocfs_open_agent_actions(struct inode *inode, struct file *file)
+static int lprocfs_open_hsm_actions(struct inode *inode, struct file *file)
 {
        struct agent_action_iterator    *aai;
        struct seq_file                 *s;
@@ -509,10 +508,7 @@ static int lprocfs_open_agent_actions(struct inode *inode, struct file *file)
        struct mdt_device               *mdt;
        ENTRY;
 
-       if (LPROCFS_ENTRY_CHECK(PDE(inode)))
-               RETURN(-ENOENT);
-
-       rc = seq_open(file, &mdt_agent_actions_proc_ops);
+       rc = seq_open(file, &mdt_hsm_actions_proc_ops);
        if (rc)
                RETURN(rc);
 
@@ -528,8 +524,8 @@ static int lprocfs_open_agent_actions(struct inode *inode, struct file *file)
        /* mdt is saved in proc_dir_entry->data by
         * mdt_coordinator_procfs_init() calling lprocfs_register()
         */
-       mdt = (struct mdt_device *)PDE(inode)->data;
-       aai->aai_obd = mdt2obd_dev(mdt);
+       mdt = (struct mdt_device *)PDE_DATA(inode);
+       aai->aai_mdt = mdt;
        s = file->private_data;
        s->private = aai;
 
@@ -546,10 +542,10 @@ out:
 }
 
 /**
- * lprocfs_release_agent_actions() is called at end of /proc access
- * free alloacted ressources and call cleanup lprocfs methods
+ * lprocfs_release_hsm_actions() is called at end of /proc access.
+ * It frees allocated resources and calls cleanup lprocfs methods.
  */
-static int lprocfs_release_agent_actions(struct inode *inode, struct file *file)
+static int lprocfs_release_hsm_actions(struct inode *inode, struct file *file)
 {
        struct seq_file                 *seq = file->private_data;
        struct agent_action_iterator    *aai = seq->private;
@@ -562,12 +558,12 @@ static int lprocfs_release_agent_actions(struct inode *inode, struct file *file)
        return lprocfs_seq_release(inode, file);
 }
 
-/* methods to access agent actions llog through /proc */
-const struct file_operations mdt_agent_actions_fops = {
+/* Methods to access HSM action list LLOG through /proc */
+const struct file_operations mdt_hsm_actions_fops = {
        .owner          = THIS_MODULE,
-       .open           = lprocfs_open_agent_actions,
+       .open           = lprocfs_open_hsm_actions,
        .read           = seq_read,
        .llseek         = seq_lseek,
-       .release        = lprocfs_release_agent_actions,
+       .release        = lprocfs_release_hsm_actions,
 };