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authorBrian Foster <bfoster@redhat.com>2014-07-15 08:07:29 +1000
committerDave Chinner <david@fromorbit.com>2014-07-15 08:07:29 +1000
commitbaff4e44b92aad363dcce176b907a369ee8b348e (patch)
tree273b69069917ee59eeed0472b34a590a519c3b9b /fs/xfs
parenta31b1d3d89e40f585a1c6745b066774ee3263eb2 (diff)
xfs: add xlog sysfs kobject and attribute handlers
Embed a kobject into the xfs log data structure (xlog). This creates a 'log' subdirectory for every XFS mount instance in sysfs. The lifecycle of the log kobject is tied to the lifecycle of the log. Also define a set of generic attribute handlers associated with the log kobject in preparation for the addition of attributes. Signed-off-by: Brian Foster <bfoster@redhat.com> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
Diffstat (limited to 'fs/xfs')
-rw-r--r--fs/xfs/xfs_log.c9
-rw-r--r--fs/xfs/xfs_log_priv.h2
-rw-r--r--fs/xfs/xfs_sysfs.c52
-rw-r--r--fs/xfs/xfs_sysfs.h1
4 files changed, 64 insertions, 0 deletions
diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c
index 7647818b8c8a..149a4a575a09 100644
--- a/fs/xfs/xfs_log.c
+++ b/fs/xfs/xfs_log.c
@@ -34,6 +34,7 @@
#include "xfs_trace.h"
#include "xfs_fsops.h"
#include "xfs_cksum.h"
+#include "xfs_sysfs.h"
kmem_zone_t *xfs_log_ticket_zone;
@@ -707,6 +708,11 @@ xfs_log_mount(
}
}
+ error = xfs_sysfs_init(&mp->m_log->l_kobj, &xfs_log_ktype, &mp->m_kobj,
+ "log");
+ if (error)
+ goto out_destroy_ail;
+
/* Normal transactions can now occur */
mp->m_log->l_flags &= ~XLOG_ACTIVE_RECOVERY;
@@ -947,6 +953,9 @@ xfs_log_unmount(
xfs_log_quiesce(mp);
xfs_trans_ail_destroy(mp);
+
+ xfs_sysfs_del(&mp->m_log->l_kobj);
+
xlog_dealloc_log(mp->m_log);
}
diff --git a/fs/xfs/xfs_log_priv.h b/fs/xfs/xfs_log_priv.h
index 9bc403a9e54f..db7cbdeb2b42 100644
--- a/fs/xfs/xfs_log_priv.h
+++ b/fs/xfs/xfs_log_priv.h
@@ -405,6 +405,8 @@ struct xlog {
struct xlog_grant_head l_reserve_head;
struct xlog_grant_head l_write_head;
+ struct xfs_kobj l_kobj;
+
/* The following field are used for debugging; need to hold icloglock */
#ifdef DEBUG
char *l_iclog_bak[XLOG_MAX_ICLOGS];
diff --git a/fs/xfs/xfs_sysfs.c b/fs/xfs/xfs_sysfs.c
index ae9aa7a1a06a..88361d76f73a 100644
--- a/fs/xfs/xfs_sysfs.c
+++ b/fs/xfs/xfs_sysfs.c
@@ -18,6 +18,9 @@
#include "xfs.h"
#include "xfs_sysfs.h"
+#include "xfs_log_format.h"
+#include "xfs_log.h"
+#include "xfs_log_priv.h"
struct xfs_sysfs_attr {
struct attribute attr;
@@ -47,3 +50,52 @@ to_attr(struct attribute *attr)
struct kobj_type xfs_mp_ktype = {
.release = xfs_sysfs_release,
};
+
+/* xlog */
+
+static struct attribute *xfs_log_attrs[] = {
+ NULL,
+};
+
+static inline struct xlog *
+to_xlog(struct kobject *kobject)
+{
+ struct xfs_kobj *kobj = to_kobj(kobject);
+ return container_of(kobj, struct xlog, l_kobj);
+}
+
+STATIC ssize_t
+xfs_log_show(
+ struct kobject *kobject,
+ struct attribute *attr,
+ char *buf)
+{
+ struct xlog *log = to_xlog(kobject);
+ struct xfs_sysfs_attr *xfs_attr = to_attr(attr);
+
+ return xfs_attr->show ? xfs_attr->show(buf, log) : 0;
+}
+
+STATIC ssize_t
+xfs_log_store(
+ struct kobject *kobject,
+ struct attribute *attr,
+ const char *buf,
+ size_t count)
+{
+ struct xlog *log = to_xlog(kobject);
+ struct xfs_sysfs_attr *xfs_attr = to_attr(attr);
+
+ return xfs_attr->store ? xfs_attr->store(buf, count, log) : 0;
+}
+
+static struct sysfs_ops xfs_log_ops = {
+ .show = xfs_log_show,
+ .store = xfs_log_store,
+};
+
+struct kobj_type xfs_log_ktype = {
+ .release = xfs_sysfs_release,
+ .sysfs_ops = &xfs_log_ops,
+ .default_attrs = xfs_log_attrs,
+};
diff --git a/fs/xfs/xfs_sysfs.h b/fs/xfs/xfs_sysfs.h
index 4bd5fff75d0f..54a2091183c0 100644
--- a/fs/xfs/xfs_sysfs.h
+++ b/fs/xfs/xfs_sysfs.h
@@ -20,6 +20,7 @@
#define __XFS_SYSFS_H__
extern struct kobj_type xfs_mp_ktype; /* xfs_mount */
+extern struct kobj_type xfs_log_ktype; /* xlog */
static inline struct xfs_kobj *
to_kobj(struct kobject *kobject)