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From: Andiry Xu <jix024@eng.ucsd.edu>
To: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-nvdimm@lists.01.org
Cc: dan.j.williams@intel.com, andy.rudoff@intel.com,
	coughlan@redhat.com, swanson@cs.ucsd.edu, david@fromorbit.com,
	jack@suse.com, swhiteho@redhat.com, miklos@szeredi.hu,
	andiry.xu@gmail.com, Andiry Xu <jix024@cs.ucsd.edu>
Subject: [RFC v2 44/83] Log operation: invalidate log entries
Date: Sat, 10 Mar 2018 10:18:25 -0800
Message-ID: <1520705944-6723-45-git-send-email-jix024@eng.ucsd.edu> (raw)
In-Reply-To: <1520705944-6723-1-git-send-email-jix024@eng.ucsd.edu>

From: Andiry Xu <jix024@cs.ucsd.edu>

After new log entries are appended to the log, old log entries
can be marked invalid to faciliate garbage collection.

Signed-off-by: Andiry Xu <jix024@cs.ucsd.edu>
---
 fs/nova/log.c  | 160 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 fs/nova/log.h  |   4 ++
 fs/nova/nova.h |  12 +++++
 3 files changed, 176 insertions(+)

diff --git a/fs/nova/log.c b/fs/nova/log.c
index c8b7d2e..d150f2e 100644
--- a/fs/nova/log.c
+++ b/fs/nova/log.c
@@ -20,6 +20,88 @@
 #include "inode.h"
 #include "log.h"
 
+static int nova_execute_invalidate_reassign_logentry(struct super_block *sb,
+	void *entry, enum nova_entry_type type, int reassign,
+	unsigned int num_free)
+{
+	struct nova_file_write_entry *fw_entry;
+	int invalid = 0;
+
+	switch (type) {
+	case FILE_WRITE:
+		fw_entry = (struct nova_file_write_entry *)entry;
+		if (reassign)
+			fw_entry->reassigned = 1;
+		if (num_free)
+			fw_entry->invalid_pages += num_free;
+		if (fw_entry->invalid_pages == fw_entry->num_pages)
+			invalid = 1;
+		break;
+	case DIR_LOG:
+		if (reassign) {
+			((struct nova_dentry *)entry)->reassigned = 1;
+		} else {
+			((struct nova_dentry *)entry)->invalid = 1;
+			invalid = 1;
+		}
+		break;
+	case SET_ATTR:
+		((struct nova_setattr_logentry *)entry)->invalid = 1;
+		invalid = 1;
+		break;
+	case LINK_CHANGE:
+		((struct nova_link_change_entry *)entry)->invalid = 1;
+		invalid = 1;
+		break;
+	default:
+		break;
+	}
+
+	if (invalid) {
+		u64 addr = nova_get_addr_off(NOVA_SB(sb), entry);
+
+		nova_inc_page_invalid_entries(sb, addr);
+	}
+
+	nova_persist_entry(entry);
+	return 0;
+}
+
+static int nova_invalidate_reassign_logentry(struct super_block *sb,
+	void *entry, enum nova_entry_type type, int reassign,
+	unsigned int num_free)
+{
+	nova_execute_invalidate_reassign_logentry(sb, entry, type,
+						reassign, num_free);
+	return 0;
+}
+
+static int nova_invalidate_logentry(struct super_block *sb, void *entry,
+	enum nova_entry_type type, unsigned int num_free)
+{
+	return nova_invalidate_reassign_logentry(sb, entry, type, 0, num_free);
+}
+
+static int nova_reassign_logentry(struct super_block *sb, void *entry,
+	enum nova_entry_type type)
+{
+	return nova_invalidate_reassign_logentry(sb, entry, type, 1, 0);
+}
+
+static inline int nova_invalidate_write_entry(struct super_block *sb,
+	struct nova_file_write_entry *entry, int reassign,
+	unsigned int num_free)
+{
+	if (!entry)
+		return 0;
+
+	if (num_free == 0 && entry->reassigned == 1)
+		return 0;
+
+	return nova_invalidate_reassign_logentry(sb, entry, FILE_WRITE,
+							reassign, num_free);
+}
+
 static void nova_update_setattr_entry(struct inode *inode,
 	struct nova_setattr_logentry *entry,
 	struct nova_log_entry_info *entry_info)
@@ -279,6 +361,27 @@ static int nova_append_setattr_entry(struct super_block *sb,
 	return ret;
 }
 
+/* Invalidate old setattr entry */
+static int nova_invalidate_setattr_entry(struct super_block *sb,
+	u64 last_setattr)
+{
+	struct nova_setattr_logentry *old_entry;
+	void *addr;
+	int ret;
+
+	addr = (void *)nova_get_block(sb, last_setattr);
+	old_entry = (struct nova_setattr_logentry *)addr;
+
+	/* Do not invalidate setsize entries */
+	if (!old_entry_freeable(sb, old_entry->epoch_id) ||
+			(old_entry->attr & ATTR_SIZE))
+		return 0;
+
+	ret = nova_invalidate_logentry(sb, old_entry, SET_ATTR, 0);
+
+	return ret;
+}
+
 static int nova_can_inplace_update_setattr(struct super_block *sb,
 	struct nova_inode_info_header *sih, u64 epoch_id)
 {
@@ -358,9 +461,35 @@ int nova_handle_setattr_operation(struct super_block *sb, struct inode *inode,
 		nova_update_inode(sb, inode, pi, &update);
 	}
 
+	/* Invalidate old setattr entry */
+	if (last_setattr)
+		nova_invalidate_setattr_entry(sb, last_setattr);
+
 	return 0;
 }
 
+/* Invalidate old link change entry */
+int nova_invalidate_link_change_entry(struct super_block *sb,
+	u64 old_link_change)
+{
+	struct nova_link_change_entry *old_entry;
+	void *addr;
+	int ret;
+
+	if (old_link_change == 0)
+		return 0;
+
+	addr = (void *)nova_get_block(sb, old_link_change);
+	old_entry = (struct nova_link_change_entry *)addr;
+
+	if (!old_entry_freeable(sb, old_entry->epoch_id))
+		return 0;
+
+	ret = nova_invalidate_logentry(sb, old_entry, LINK_CHANGE, 0);
+
+	return ret;
+}
+
 static int nova_can_inplace_update_lcentry(struct super_block *sb,
 	struct nova_inode_info_header *sih, u64 epoch_id)
 {
@@ -481,6 +610,37 @@ int nova_append_file_write_entry(struct super_block *sb, struct nova_inode *pi,
 	return ret;
 }
 
+/* Create dentry and delete dentry must be invalidated together */
+int nova_invalidate_dentries(struct super_block *sb,
+	struct nova_inode_update *update)
+{
+	struct nova_sb_info *sbi = NOVA_SB(sb);
+	struct nova_dentry *create_dentry;
+	struct nova_dentry *delete_dentry;
+	u64 create_curr, delete_curr;
+	int ret;
+
+	create_dentry = update->create_dentry;
+	delete_dentry = update->delete_dentry;
+
+	if (!create_dentry)
+		return 0;
+
+	nova_reassign_logentry(sb, create_dentry, DIR_LOG);
+
+	if (!old_entry_freeable(sb, create_dentry->epoch_id))
+		return 0;
+
+	create_curr = nova_get_addr_off(sbi, create_dentry);
+	delete_curr = nova_get_addr_off(sbi, delete_dentry);
+
+	nova_invalidate_logentry(sb, create_dentry, DIR_LOG, 0);
+
+	ret = nova_invalidate_logentry(sb, delete_dentry, DIR_LOG, 0);
+
+	return ret;
+}
+
 int nova_inplace_update_dentry(struct super_block *sb,
 	struct inode *dir, struct nova_dentry *dentry, int link_change,
 	u64 epoch_id)
diff --git a/fs/nova/log.h b/fs/nova/log.h
index 74891b3..2548083 100644
--- a/fs/nova/log.h
+++ b/fs/nova/log.h
@@ -367,6 +367,8 @@ static inline int is_dir_init_entry(struct super_block *sb,
 int nova_handle_setattr_operation(struct super_block *sb, struct inode *inode,
 	struct nova_inode *pi, unsigned int ia_valid, struct iattr *attr,
 	u64 epoch_id);
+int nova_invalidate_link_change_entry(struct super_block *sb,
+	u64 old_link_change);
 int nova_append_link_change_entry(struct super_block *sb,
 	struct nova_inode *pi, struct inode *inode,
 	struct nova_inode_update *update, u64 *old_linkc, u64 epoch_id);
@@ -376,6 +378,8 @@ int nova_inplace_update_write_entry(struct super_block *sb,
 int nova_append_file_write_entry(struct super_block *sb, struct nova_inode *pi,
 	struct inode *inode, struct nova_file_write_item *item,
 	struct nova_inode_update *update);
+int nova_invalidate_dentries(struct super_block *sb,
+	struct nova_inode_update *update);
 int nova_inplace_update_dentry(struct super_block *sb,
 	struct inode *dir, struct nova_dentry *dentry, int link_change,
 	u64 epoch_id);
diff --git a/fs/nova/nova.h b/fs/nova/nova.h
index 03c4991..6cf3c33 100644
--- a/fs/nova/nova.h
+++ b/fs/nova/nova.h
@@ -328,6 +328,18 @@ struct inode_map {
 	int			freed;
 };
 
+
+/* Old entry is freeable if it is appended after the latest snapshot */
+static inline int old_entry_freeable(struct super_block *sb, u64 epoch_id)
+{
+	struct nova_sb_info *sbi = NOVA_SB(sb);
+
+	if (epoch_id == sbi->s_epoch_id)
+		return 1;
+
+	return 0;
+}
+
 #include "balloc.h"
 
 static inline unsigned long
-- 
2.7.4

  parent reply index

Thread overview: 119+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-03-10 18:17 [RFC v2 00/83] NOVA: a new file system for persistent memory Andiry Xu
2018-03-10 18:17 ` [RFC v2 01/83] Introduction and documentation of NOVA filesystem Andiry Xu
2018-03-19 20:43   ` Randy Dunlap
2018-03-19 23:00     ` Andiry Xu
2018-04-22  8:05   ` Pavel Machek
2018-03-10 18:17 ` [RFC v2 02/83] Add nova_def.h Andiry Xu
2018-03-10 18:17 ` [RFC v2 03/83] Add super.h Andiry Xu
2018-03-15  4:54   ` Darrick J. Wong
2018-03-15  6:11     ` Andiry Xu
2018-03-15  9:05       ` Arnd Bergmann
2018-03-15 17:51         ` Andiry Xu
2018-03-15 20:04           ` Andreas Dilger
2018-03-15 20:38           ` Arnd Bergmann
2018-03-16  2:59             ` Theodore Y. Ts'o
2018-03-16  6:17               ` Andiry Xu
2018-03-16  6:30                 ` Darrick J. Wong
2018-03-16  9:19               ` Arnd Bergmann
2018-03-10 18:17 ` [RFC v2 04/83] NOVA inode definition Andiry Xu
2018-03-15  5:06   ` Darrick J. Wong
2018-03-15  6:16     ` Andiry Xu
2018-03-10 18:17 ` [RFC v2 05/83] Add NOVA filesystem definitions and useful helper routines Andiry Xu
2018-03-11 12:00   ` Nikolay Borisov
2018-03-11 19:22     ` Eric Biggers
2018-03-11 21:45       ` Andiry Xu
2018-03-19 19:39       ` Andiry Xu
2018-03-19 20:30         ` Eric Biggers
2018-03-19 21:59           ` Andiry Xu
2018-03-10 18:17 ` [RFC v2 06/83] Add inode get/read methods Andiry Xu
2018-04-23  6:12   ` Darrick J. Wong
2018-04-23 15:55     ` Andiry Xu
2018-03-10 18:17 ` [RFC v2 07/83] Initialize inode_info and rebuild inode information in nova_iget() Andiry Xu
2018-03-10 18:17 ` [RFC v2 08/83] NOVA superblock operations Andiry Xu
2018-03-10 18:17 ` [RFC v2 09/83] Add Kconfig and Makefile Andiry Xu
2018-03-11 12:15   ` Nikolay Borisov
2018-03-11 21:32     ` Andiry Xu
2018-03-10 18:17 ` [RFC v2 10/83] Add superblock integrity check Andiry Xu
2018-03-10 18:17 ` [RFC v2 11/83] Add timing and I/O statistics for performance analysis and profiling Andiry Xu
2018-03-10 18:17 ` [RFC v2 12/83] Add timing for mount and init Andiry Xu
2018-03-10 18:17 ` [RFC v2 13/83] Add remount_fs and show_options methods Andiry Xu
2018-03-10 18:17 ` [RFC v2 14/83] Add range node kmem cache Andiry Xu
2018-03-11 11:55   ` Nikolay Borisov
2018-03-11 21:31     ` Andiry Xu
2018-03-10 18:17 ` [RFC v2 15/83] Add free list data structure Andiry Xu
2018-03-10 18:17 ` [RFC v2 16/83] Initialize block map and free lists in nova_init() Andiry Xu
2018-03-11 12:12   ` Nikolay Borisov
2018-03-11 21:30     ` Andiry Xu
2018-03-10 18:17 ` [RFC v2 17/83] Add statfs support Andiry Xu
2018-03-10 18:17 ` [RFC v2 18/83] Add freelist statistics printing Andiry Xu
2018-03-10 18:18 ` [RFC v2 19/83] Add pmem block free routines Andiry Xu
2018-03-10 18:18 ` [RFC v2 20/83] Pmem block allocation routines Andiry Xu
2018-03-10 18:18 ` [RFC v2 21/83] Add log structure Andiry Xu
2018-03-10 18:18 ` [RFC v2 22/83] Inode log pages allocation and reclaimation Andiry Xu
2018-03-10 18:18 ` [RFC v2 23/83] Save allocator to pmem in put_super Andiry Xu
2018-03-10 18:18 ` [RFC v2 24/83] Initialize and allocate inode table Andiry Xu
2018-03-10 18:18 ` [RFC v2 25/83] Support get normal inode address and inode table extentsion Andiry Xu
2018-03-10 18:18 ` [RFC v2 26/83] Add inode_map to track inuse inodes Andiry Xu
2018-03-10 18:18 ` [RFC v2 27/83] Save the inode inuse list to pmem upon umount Andiry Xu
2018-03-10 18:18 ` [RFC v2 28/83] Add NOVA address space operations Andiry Xu
2018-03-10 18:18 ` [RFC v2 29/83] Add write_inode and dirty_inode routines Andiry Xu
2018-03-10 18:18 ` [RFC v2 30/83] New NOVA inode allocation Andiry Xu
2018-03-10 18:18 ` [RFC v2 31/83] Add new vfs " Andiry Xu
2018-03-10 18:18 ` [RFC v2 32/83] Add log entry definitions Andiry Xu
2018-03-10 18:18 ` [RFC v2 33/83] Inode log and entry printing for debug purpose Andiry Xu
2018-03-10 18:18 ` [RFC v2 34/83] Journal: NOVA light weight journal definitions Andiry Xu
2018-03-10 18:18 ` [RFC v2 35/83] Journal: Lite journal helper routines Andiry Xu
2018-03-10 18:18 ` [RFC v2 36/83] Journal: Lite journal recovery Andiry Xu
2018-03-10 18:18 ` [RFC v2 37/83] Journal: Lite journal create and commit Andiry Xu
2018-03-10 18:18 ` [RFC v2 38/83] Journal: NOVA lite journal initialization Andiry Xu
2018-03-10 18:18 ` [RFC v2 39/83] Log operation: dentry append Andiry Xu
2018-03-10 18:18 ` [RFC v2 40/83] Log operation: file write entry append Andiry Xu
2018-03-10 18:18 ` [RFC v2 41/83] Log operation: setattr " Andiry Xu
2018-03-10 18:18 ` [RFC v2 42/83] Log operation: link change append Andiry Xu
2018-03-10 18:18 ` [RFC v2 43/83] Log operation: in-place update log entry Andiry Xu
2018-03-10 18:18 ` Andiry Xu [this message]
2018-03-10 18:18 ` [RFC v2 45/83] Log operation: file inode log lookup and assign Andiry Xu
2018-03-10 18:18 ` [RFC v2 46/83] Dir: Add Directory radix tree insert/remove methods Andiry Xu
2018-03-10 18:18 ` [RFC v2 47/83] Dir: Add initial dentries when initializing a directory inode log Andiry Xu
2018-03-10 18:18 ` [RFC v2 48/83] Dir: Readdir operation Andiry Xu
2018-03-10 18:18 ` [RFC v2 49/83] Dir: Append create/remove dentry Andiry Xu
2018-03-10 18:18 ` [RFC v2 50/83] Inode: Add nova_evict_inode Andiry Xu
2018-03-10 18:18 ` [RFC v2 51/83] Rebuild: directory inode Andiry Xu
2018-03-10 18:18 ` [RFC v2 52/83] Rebuild: file inode Andiry Xu
2018-03-10 18:18 ` [RFC v2 53/83] Namei: lookup Andiry Xu
2018-03-10 18:18 ` [RFC v2 54/83] Namei: create and mknod Andiry Xu
2018-03-10 18:18 ` [RFC v2 55/83] Namei: mkdir Andiry Xu
2018-03-10 18:18 ` [RFC v2 56/83] Namei: link and unlink Andiry Xu
2018-03-10 18:18 ` [RFC v2 57/83] Namei: rmdir Andiry Xu
2018-03-10 18:18 ` [RFC v2 58/83] Namei: rename Andiry Xu
2018-03-10 18:18 ` [RFC v2 59/83] Namei: setattr Andiry Xu
2018-03-10 18:18 ` [RFC v2 60/83] Add special inode operations Andiry Xu
2018-03-10 18:18 ` [RFC v2 61/83] Super: Add nova_export_ops Andiry Xu
2018-03-10 18:18 ` [RFC v2 62/83] File: getattr and file inode operations Andiry Xu
2018-03-10 18:18 ` [RFC v2 63/83] File operation: llseek Andiry Xu
2018-03-10 18:18 ` [RFC v2 64/83] File operation: open, fsync, flush Andiry Xu
2018-03-10 18:18 ` [RFC v2 65/83] File operation: read Andiry Xu
2018-03-10 18:18 ` [RFC v2 66/83] Super: Add file write item cache Andiry Xu
2018-03-10 18:18 ` [RFC v2 67/83] Dax: commit list of file write items to log Andiry Xu
2018-03-10 18:18 ` [RFC v2 68/83] File operation: copy-on-write write Andiry Xu
2018-03-10 18:18 ` [RFC v2 69/83] Super: Add module param inplace_data_updates Andiry Xu
2018-03-10 18:18 ` [RFC v2 70/83] File operation: Inplace write Andiry Xu
2018-03-10 18:18 ` [RFC v2 71/83] Symlink support Andiry Xu
2018-03-10 18:18 ` [RFC v2 72/83] File operation: fallocate Andiry Xu
2018-03-10 18:18 ` [RFC v2 73/83] Dax: Add iomap operations Andiry Xu
2018-03-10 18:18 ` [RFC v2 74/83] File operation: Mmap Andiry Xu
2018-03-10 18:18 ` [RFC v2 75/83] File operation: read/write iter Andiry Xu
2018-03-10 18:18 ` [RFC v2 76/83] Ioctl support Andiry Xu
2018-03-10 18:18 ` [RFC v2 77/83] GC: Fast garbage collection Andiry Xu
2018-03-10 18:18 ` [RFC v2 78/83] GC: Thorough " Andiry Xu
2018-03-10 18:19 ` [RFC v2 79/83] Normal recovery Andiry Xu
2018-03-10 18:19 ` [RFC v2 80/83] Failure recovery: bitmap operations Andiry Xu
2018-03-10 18:19 ` [RFC v2 81/83] Failure recovery: Inode pages recovery routines Andiry Xu
2018-03-10 18:19 ` [RFC v2 82/83] Failure recovery: Per-CPU recovery Andiry Xu
2018-03-10 18:19 ` [RFC v2 83/83] Sysfs support Andiry Xu
2018-03-15  0:33   ` Randy Dunlap
2018-03-15  6:07     ` Andiry Xu
2018-03-22 15:00   ` David Sterba
2018-03-23  0:31     ` Andiry Xu
2018-03-11  2:14 ` [RFC v2 00/83] NOVA: a new file system for persistent memory Theodore Y. Ts'o
2018-03-11  4:58   ` Andiry Xu

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