From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mark Fasheh Date: Wed, 2 Apr 2008 13:14:55 -0700 Subject: [Ocfs2-devel] [PATCH 45/62] ocfs2/dlm: Dumps the purgelist into a debugfs file In-Reply-To: <12071674103432-git-send-email-mfasheh@suse.com> References: <12071673121124-git-send-email-mfasheh@suse.com> <1207167318479-git-send-email-mfasheh@suse.com> <12071673203909-git-send-email-mfasheh@suse.com> <12071673232465-git-send-email-mfasheh@suse.com> <12071673263948-git-send-email-mfasheh@suse.com> <12071673282579-git-send-email-mfasheh@suse.com> <1207167330482-git-send-email-mfasheh@suse.com> <12071673321172-git-send-email-mfasheh@suse.com> <12071673341888-git-send-email-mfasheh@suse.com> <12071673362069-git-send-email-mfasheh@suse.com> <12071673391031-git-send-email-mfasheh@suse.com> <12071673413492-git-send-email-mfasheh@suse.com> <1207167343926-git-send-email-mfasheh@suse.com> <12071673461268-git-send-email-mfasheh@suse.com> <12071673481928-git-send-email-mfasheh@suse.com> <12071673492775-git-send-email-mfasheh@suse.com> <12071673511262-git-send-email-mfasheh@suse.com> <12071673543752-git-send-email-mfasheh@suse.com> <1207167355295-git-send-email-mfasheh@suse.com> <12071673571757-git-send-email-mfasheh@suse.com> <12071673591158-git-send-email-mfasheh@suse.com> <12071673613757-git-send-email-mfasheh@suse.com> <1207167363119-git-send-email-mfasheh@suse.com> <12071673661674-git-send-email-mfasheh@suse.com> <12071673681650-git-send-email-mfasheh@suse.com> <12071673701937-git-send-email-mfasheh@suse.com> <12071673722691-git-send-email-mfasheh@suse.com> <12071673731276-git-send-email-mfasheh@suse.com> <12071673753788-git-send-email-mfasheh@suse.com> <12071673772233-git-send-email-mfasheh@suse.com> <1207167379283-git-send-email-mfasheh@suse.com> <12071673821008-git-send-email-mfasheh@suse.com> <12071673843208-git-send-email-mfasheh@suse.com> <12071673872568-git-send-email-mfasheh@suse.com> <12071673882492-git-send-email-mfasheh@suse.com> <1207167390414-git-send-email-mfasheh@suse.com> <1207167392537-git-send-email-mfasheh@suse.com> <12071673941659-git-send-email-mfasheh@suse.com> <12071673964014-git-send-email-mfasheh@suse.com> <1207167398684-git-send-email-mfasheh@suse.com> <12071674013954-git-send-email-mfasheh@suse.com> <12071674033903-git-send-email-mfasheh@suse.com> <12071674061934-git-send-email-mfasheh@suse.com> <12071674083120-git-send-email-mfasheh@suse.com> <12071674103432-git-send-email-mfasheh@suse.com> Message-ID: <1207167413855-git-send-email-mfasheh@suse.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-kernel@vger.kernel.org Cc: ocfs2-devel@oss.oracle.com, Joel Becker , Sunil Mushran From: Sunil Mushran This patch dumps all the lockres' on the purgelist it can fit in one page into a debugfs file. Useful for debugging. Signed-off-by: Sunil Mushran Signed-off-by: Joel Becker Signed-off-by: Mark Fasheh --- fs/ocfs2/dlm/dlmdebug.c | 71 +++++++++++++++++++++++++++++++++++++++++++++++ fs/ocfs2/dlm/dlmdebug.h | 1 + 2 files changed, 72 insertions(+), 0 deletions(-) diff --git a/fs/ocfs2/dlm/dlmdebug.c b/fs/ocfs2/dlm/dlmdebug.c index 6de326b..a109005 100644 --- a/fs/ocfs2/dlm/dlmdebug.c +++ b/fs/ocfs2/dlm/dlmdebug.c @@ -303,6 +303,7 @@ static int stringify_lockname(const char *lockname, int locklen, #define DLM_DEBUGFS_DLM_STATE "dlm_state" #define DLM_DEBUGFS_LOCKING_STATE "locking_state" #define DLM_DEBUGFS_MLE_STATE "mle_state" +#define DLM_DEBUGFS_PURGE_LIST "purge_list" /* begin - utils funcs */ static void dlm_debug_free(struct kref *kref) @@ -396,6 +397,63 @@ static int debug_buffer_release(struct inode *inode, struct file *file) } /* end - util funcs */ +/* begin - purge list funcs */ +static int debug_purgelist_print(struct dlm_ctxt *dlm, struct debug_buffer *db) +{ + struct dlm_lock_resource *res; + int out = 0; + unsigned long total = 0; + + out += snprintf(db->buf + out, db->len - out, + "Dumping Purgelist for Domain: %s\n", dlm->name); + + spin_lock(&dlm->spinlock); + list_for_each_entry(res, &dlm->purge_list, purge) { + ++total; + if (db->len - out < 100) + continue; + spin_lock(&res->spinlock); + out += stringify_lockname(res->lockname.name, + res->lockname.len, + db->buf + out, db->len - out); + out += snprintf(db->buf + out, db->len - out, "\t%ld\n", + (jiffies - res->last_used)/HZ); + spin_unlock(&res->spinlock); + } + spin_unlock(&dlm->spinlock); + + out += snprintf(db->buf + out, db->len - out, + "Total on list: %ld\n", total); + + return out; +} + +static int debug_purgelist_open(struct inode *inode, struct file *file) +{ + struct dlm_ctxt *dlm = inode->i_private; + struct debug_buffer *db; + + db = debug_buffer_allocate(); + if (!db) + goto bail; + + db->len = debug_purgelist_print(dlm, db); + + file->private_data = db; + + return 0; +bail: + return -ENOMEM; +} + +static struct file_operations debug_purgelist_fops = { + .open = debug_purgelist_open, + .release = debug_buffer_release, + .read = debug_buffer_read, + .llseek = debug_buffer_llseek, +}; +/* end - purge list funcs */ + /* begin - debug mle funcs */ static int dump_mle(struct dlm_master_list_entry *mle, char *buf, int len) { @@ -906,6 +964,17 @@ int dlm_debug_init(struct dlm_ctxt *dlm) goto bail; } + /* for dumping lockres on the purge list */ + dc->debug_purgelist_dentry = + debugfs_create_file(DLM_DEBUGFS_PURGE_LIST, + S_IFREG|S_IRUSR, + dlm->dlm_debugfs_subroot, + dlm, &debug_purgelist_fops); + if (!dc->debug_purgelist_dentry) { + mlog_errno(-ENOMEM); + goto bail; + } + dlm_debug_get(dc); return 0; @@ -919,6 +988,8 @@ void dlm_debug_shutdown(struct dlm_ctxt *dlm) struct dlm_debug_ctxt *dc = dlm->dlm_debug_ctxt; if (dc) { + if (dc->debug_purgelist_dentry) + debugfs_remove(dc->debug_purgelist_dentry); if (dc->debug_mle_dentry) debugfs_remove(dc->debug_mle_dentry); if (dc->debug_lockres_dentry) diff --git a/fs/ocfs2/dlm/dlmdebug.h b/fs/ocfs2/dlm/dlmdebug.h index cbc69f2..8857743 100644 --- a/fs/ocfs2/dlm/dlmdebug.h +++ b/fs/ocfs2/dlm/dlmdebug.h @@ -32,6 +32,7 @@ struct dlm_debug_ctxt { struct dentry *debug_state_dentry; struct dentry *debug_lockres_dentry; struct dentry *debug_mle_dentry; + struct dentry *debug_purgelist_dentry; }; struct debug_buffer { -- 1.5.4.1