From: Zhi Yong Wu <wu...@linux.vnet.ibm.com>
Introduce one new mount option '-o hot_track',
and add its parsing support.
Its usage looks like:
mount -o hot_track
mount -o nouser,hot_track
mount -o nouser,hot_track,loop
mount -o hot_track,nouser
Signed-off-by: Zhi Yong Wu <wu...@linux.vnet.ibm.com>
---
fs/btrfs/ctree.h | 1 +
fs/btrfs/super.c | 7 ++++++-
2 files changed, 7 insertions(+), 1 deletions(-)
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 9821b67..094bec6 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -1726,6 +1726,7 @@ struct btrfs_ioctl_defrag_range_args {
#define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
#define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
#define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
+#define BTRFS_MOUNT_HOT_TRACK (1 << 23)
#define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
#define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 83d6f9f..00be9e3 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -41,6 +41,7 @@
#include <linux/slab.h>
#include <linux/cleancache.h>
#include <linux/ratelimit.h>
+#include <linux/hot_tracking.h>
#include "compat.h"
#include "delayed-inode.h"
#include "ctree.h"
@@ -303,7 +304,7 @@ enum {
Opt_notreelog, Opt_ratio, Opt_flushoncommit, Opt_discard,
Opt_space_cache, Opt_clear_cache, Opt_user_subvol_rm_allowed,
Opt_enospc_debug, Opt_subvolrootid, Opt_defrag, Opt_inode_cache,
- Opt_no_space_cache, Opt_recovery, Opt_skip_balance,
+ Opt_no_space_cache, Opt_recovery, Opt_skip_balance, Opt_hot_track,
Opt_check_integrity, Opt_check_integrity_including_extent_data,
Opt_check_integrity_print_mask, Opt_fatal_errors,
Opt_err,
@@ -342,6 +343,7 @@ static match_table_t tokens = {
{Opt_no_space_cache, "nospace_cache"},
{Opt_recovery, "recovery"},
{Opt_skip_balance, "skip_balance"},
+ {Opt_hot_track, "hot_track"},
{Opt_check_integrity, "check_int"},
{Opt_check_integrity_including_extent_data, "check_int_data"},
{Opt_check_integrity_print_mask, "check_int_print_mask=%d"},
@@ -553,6 +555,9 @@ int btrfs_parse_options(struct btrfs_root *root, char
*options)
case Opt_skip_balance:
btrfs_set_opt(info->mount_opt, SKIP_BALANCE);
break;
+ case Opt_hot_track:
+ btrfs_set_opt(info->mount_opt, HOT_TRACK);
+ break;
#ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
case Opt_check_integrity_including_extent_data:
printk(KERN_INFO "btrfs: enabling check integrity"
--
1.7.6.5
--
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