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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 43/83] Log operation: in-place update log entry
Date: Sat, 10 Mar 2018 10:18:24 -0800
Message-ID: <1520705944-6723-44-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>

To in-place update a log entry, NOVA starts a lite transaction
to journal the log entry, then performs update and commits the transaction.

Signed-off-by: Andiry Xu <jix024@cs.ucsd.edu>
---
 fs/nova/inode.h |  12 ++++
 fs/nova/log.c   | 183 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 fs/nova/log.h   |   9 +++
 3 files changed, 204 insertions(+)

diff --git a/fs/nova/inode.h b/fs/nova/inode.h
index 943f77f..6970872 100644
--- a/fs/nova/inode.h
+++ b/fs/nova/inode.h
@@ -5,6 +5,7 @@ struct nova_inode_info_header;
 struct nova_inode;
 
 #include "super.h"
+#include "log.h"
 
 enum nova_new_inode_type {
 	TYPE_CREATE = 0,
@@ -143,6 +144,17 @@ static inline void nova_update_tail(struct nova_inode *pi, u64 new_tail)
 	NOVA_END_TIMING(update_tail_t, update_time);
 }
 
+static inline void nova_update_inode(struct super_block *sb,
+	struct inode *inode, struct nova_inode *pi,
+	struct nova_inode_update *update)
+{
+	struct nova_inode_info *si = NOVA_I(inode);
+	struct nova_inode_info_header *sih = &si->header;
+
+	sih->log_tail = update->tail;
+	nova_update_tail(pi, update->tail);
+}
+
 static inline
 struct inode_table *nova_get_inode_table(struct super_block *sb, int cpu)
 {
diff --git a/fs/nova/log.c b/fs/nova/log.c
index 4638ccf..c8b7d2e 100644
--- a/fs/nova/log.c
+++ b/fs/nova/log.c
@@ -218,6 +218,35 @@ static int nova_append_log_entry(struct super_block *sb,
 	return 0;
 }
 
+/* Perform lite transaction to atomically in-place update log entry */
+static int nova_inplace_update_log_entry(struct super_block *sb,
+	struct inode *inode, void *entry,
+	struct nova_log_entry_info *entry_info)
+{
+	struct nova_sb_info *sbi = NOVA_SB(sb);
+	enum nova_entry_type type = entry_info->type;
+	u64 journal_tail;
+	size_t size;
+	int cpu;
+	timing_t update_time;
+
+	NOVA_START_TIMING(update_entry_t, update_time);
+	size = nova_get_log_entry_size(sb, type);
+
+	cpu = smp_processor_id();
+	spin_lock(&sbi->journal_locks[cpu]);
+	journal_tail = nova_create_logentry_transaction(sb, entry, type, cpu);
+	nova_update_log_entry(sb, inode, entry, entry_info);
+
+	PERSISTENT_BARRIER();
+
+	nova_commit_lite_transaction(sb, journal_tail, cpu);
+	spin_unlock(&sbi->journal_locks[cpu]);
+
+	NOVA_END_TIMING(update_entry_t, update_time);
+	return 0;
+}
+
 /* Returns new tail after append */
 static int nova_append_setattr_entry(struct super_block *sb,
 	struct nova_inode *pi, struct inode *inode, struct iattr *attr,
@@ -250,6 +279,125 @@ static int nova_append_setattr_entry(struct super_block *sb,
 	return ret;
 }
 
+static int nova_can_inplace_update_setattr(struct super_block *sb,
+	struct nova_inode_info_header *sih, u64 epoch_id)
+{
+	u64 last_log = 0;
+	struct nova_setattr_logentry *entry = NULL;
+
+	last_log = sih->last_setattr;
+	if (last_log) {
+		entry = (struct nova_setattr_logentry *)nova_get_block(sb,
+								last_log);
+		/* Do not overwrite setsize entry */
+		if (entry->attr & ATTR_SIZE)
+			return 0;
+		if (entry->epoch_id == epoch_id)
+			return 1;
+	}
+
+	return 0;
+}
+
+static int nova_inplace_update_setattr_entry(struct super_block *sb,
+	struct inode *inode, struct nova_inode_info_header *sih,
+	struct iattr *attr, u64 epoch_id)
+{
+	struct nova_setattr_logentry *entry = NULL;
+	struct nova_log_entry_info entry_info;
+	u64 last_log = 0;
+
+	nova_dbgv("%s : Modifying last log entry for inode %lu\n",
+				__func__, inode->i_ino);
+	last_log = sih->last_setattr;
+	entry = (struct nova_setattr_logentry *)nova_get_block(sb,
+							last_log);
+
+	entry_info.type = SET_ATTR;
+	entry_info.attr = attr;
+	entry_info.epoch_id = epoch_id;
+	entry_info.trans_id = sih->trans_id;
+
+	return nova_inplace_update_log_entry(sb, inode, entry,
+					&entry_info);
+}
+
+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)
+{
+	struct nova_inode_info *si = NOVA_I(inode);
+	struct nova_inode_info_header *sih = &si->header;
+	struct nova_inode_update update;
+	u64 last_setattr = 0;
+	int ret;
+
+	if (ia_valid & ATTR_MODE)
+		sih->i_mode = inode->i_mode;
+
+	/*
+	 * Let's try to do inplace update.
+	 */
+	if (!(ia_valid & ATTR_SIZE) &&
+			nova_can_inplace_update_setattr(sb, sih, epoch_id)) {
+		nova_inplace_update_setattr_entry(sb, inode, sih,
+						attr, epoch_id);
+	} else {
+		/* We are holding inode lock so OK to append the log */
+		nova_dbgv("%s : Appending last log entry for inode ino = %lu\n",
+				__func__, inode->i_ino);
+		update.tail = 0;
+		ret = nova_append_setattr_entry(sb, pi, inode, attr, &update,
+						&last_setattr, epoch_id);
+		if (ret) {
+			nova_dbg("%s: append setattr entry failure\n",
+								__func__);
+			return ret;
+		}
+
+		nova_update_inode(sb, inode, pi, &update);
+	}
+
+	return 0;
+}
+
+static int nova_can_inplace_update_lcentry(struct super_block *sb,
+	struct nova_inode_info_header *sih, u64 epoch_id)
+{
+	u64 last_log = 0;
+	struct nova_link_change_entry *entry = NULL;
+
+	last_log = sih->last_link_change;
+	if (last_log) {
+		entry = (struct nova_link_change_entry *)nova_get_block(sb,
+								last_log);
+		if (entry->epoch_id == epoch_id)
+			return 1;
+	}
+
+	return 0;
+}
+
+static int nova_inplace_update_lcentry(struct super_block *sb,
+	struct inode *inode, struct nova_inode_info_header *sih,
+	u64 epoch_id)
+{
+	struct nova_link_change_entry *entry = NULL;
+	struct nova_log_entry_info entry_info;
+	u64 last_log = 0;
+
+	last_log = sih->last_link_change;
+	entry = (struct nova_link_change_entry *)nova_get_block(sb,
+							last_log);
+
+	entry_info.type = LINK_CHANGE;
+	entry_info.epoch_id = epoch_id;
+	entry_info.trans_id = sih->trans_id;
+
+	return nova_inplace_update_log_entry(sb, inode, entry,
+					&entry_info);
+}
+
 /* Returns new tail after append */
 int nova_append_link_change_entry(struct super_block *sb,
 	struct nova_inode *pi, struct inode *inode,
@@ -263,6 +411,15 @@ int nova_append_link_change_entry(struct super_block *sb,
 
 	NOVA_START_TIMING(append_link_change_t, append_time);
 
+	if (nova_can_inplace_update_lcentry(sb, sih, epoch_id)) {
+		nova_inplace_update_lcentry(sb, inode, sih, epoch_id);
+		update->tail = sih->log_tail;
+
+		*old_linkc = 0;
+		sih->trans_id++;
+		goto out;
+	}
+
 	entry_info.type = LINK_CHANGE;
 	entry_info.update = update;
 	entry_info.epoch_id = epoch_id;
@@ -282,6 +439,14 @@ int nova_append_link_change_entry(struct super_block *sb,
 	return ret;
 }
 
+int nova_inplace_update_write_entry(struct super_block *sb,
+	struct inode *inode, struct nova_file_write_entry *entry,
+	struct nova_log_entry_info *entry_info)
+{
+	return nova_inplace_update_log_entry(sb, inode, entry,
+					entry_info);
+}
+
 /*
  * Append a nova_file_write_entry to the current nova_inode_log_page.
  * blocknr and start_blk are pgoff.
@@ -316,6 +481,24 @@ int nova_append_file_write_entry(struct super_block *sb, struct nova_inode *pi,
 	return ret;
 }
 
+int nova_inplace_update_dentry(struct super_block *sb,
+	struct inode *dir, struct nova_dentry *dentry, int link_change,
+	u64 epoch_id)
+{
+	struct nova_inode_info *si = NOVA_I(dir);
+	struct nova_inode_info_header *sih = &si->header;
+	struct nova_log_entry_info entry_info;
+
+	entry_info.type = DIR_LOG;
+	entry_info.link_change = link_change;
+	entry_info.epoch_id = epoch_id;
+	entry_info.trans_id = sih->trans_id;
+	entry_info.inplace = 1;
+
+	return nova_inplace_update_log_entry(sb, dir, dentry,
+					&entry_info);
+}
+
 int nova_append_dentry(struct super_block *sb, struct nova_inode *pi,
 	struct inode *dir, struct dentry *dentry, u64 ino,
 	unsigned short de_len, struct nova_inode_update *update,
diff --git a/fs/nova/log.h b/fs/nova/log.h
index f36f4a3..74891b3 100644
--- a/fs/nova/log.h
+++ b/fs/nova/log.h
@@ -364,12 +364,21 @@ 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_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);
+int nova_inplace_update_write_entry(struct super_block *sb,
+	struct inode *inode, struct nova_file_write_entry *entry,
+	struct nova_log_entry_info *entry_info);
 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_inplace_update_dentry(struct super_block *sb,
+	struct inode *dir, struct nova_dentry *dentry, int link_change,
+	u64 epoch_id);
 int nova_append_dentry(struct super_block *sb, struct nova_inode *pi,
 	struct inode *dir, struct dentry *dentry, u64 ino,
 	unsigned short de_len, struct nova_inode_update *update,
-- 
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 ` Andiry Xu [this message]
2018-03-10 18:18 ` [RFC v2 44/83] Log operation: invalidate log entries Andiry Xu
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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