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log.c
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/*
* BRIEF DESCRIPTION
*
* Log methods
*
* Copyright 2015-2016 Regents of the University of California,
* UCSD Non-Volatile Systems Lab, Andiry Xu <[email protected]>
* Copyright 2012-2013 Intel Corporation
* Copyright 2009-2011 Marco Stornelli <[email protected]>
* Copyright 2003 Sony Corporation
* Copyright 2003 Matsushita Electric Industrial Co., Ltd.
* 2003-2004 (c) MontaVista Software, Inc. , Steve Longerbeam
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
*/
#include "nova.h"
#include "journal.h"
#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;
case MMAP_WRITE:
((struct nova_mmap_entry *)entry)->invalid = 1;
invalid = 1;
break;
case SNAPSHOT_INFO:
((struct nova_snapshot_info_entry *)entry)->deleted = 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_update_entry_csum(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)
{
unsigned long irq_flags = 0;
nova_memunlock_range(sb, entry, CACHELINE_SIZE, &irq_flags);
nova_execute_invalidate_reassign_logentry(sb, entry, type,
reassign, num_free);
nova_update_alter_entry(sb, entry);
nova_memlock_range(sb, entry, CACHELINE_SIZE, &irq_flags);
return 0;
}
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);
}
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)
{
struct nova_file_write_entry *entryc, entry_copy;
if (!entry)
return 0;
if (metadata_csum == 0)
entryc = entry;
else {
entryc = &entry_copy;
if (!nova_verify_entry_csum(sb, entry, entryc))
return -EIO;
}
if (num_free == 0 && entryc->reassigned == 1)
return 0;
return nova_invalidate_reassign_logentry(sb, entry, FILE_WRITE,
reassign, num_free);
}
unsigned int nova_free_old_entry(struct super_block *sb,
struct nova_inode_info_header *sih,
struct nova_file_write_entry *entry,
unsigned long pgoff, unsigned int num_free,
bool delete_dead, u64 epoch_id)
{
struct nova_file_write_entry *entryc, entry_copy;
unsigned long old_nvmm;
long ret = 0;
INIT_TIMING(free_time);
if (!entry)
return 0;
NOVA_START_TIMING(free_old_t, free_time);
if (metadata_csum == 0)
entryc = entry;
else {
entryc = &entry_copy;
if (!nova_verify_entry_csum(sb, entry, entryc))
return -EIO;
}
old_nvmm = get_nvmm(sb, sih, entryc, pgoff);
if (!delete_dead) {
ret = nova_append_data_to_snapshot(sb, entryc, old_nvmm,
num_free, epoch_id);
if (ret == 0) {
nova_invalidate_write_entry(sb, entry, 1, 0);
goto out;
}
nova_invalidate_write_entry(sb, entry, 1, num_free);
}
nova_dbgv("%s: pgoff %lu, free %u blocks\n",
__func__, pgoff, num_free);
nova_deref_blocks(sb, old_nvmm, num_free);
out:
sih->i_blocks -= num_free;
NOVA_END_TIMING(free_old_t, free_time);
return num_free;
}
struct nova_file_write_entry *nova_find_next_entry(struct super_block *sb,
struct nova_inode_info_header *sih, pgoff_t pgoff)
{
struct nova_file_write_entry *entry = NULL;
struct nova_file_write_entry *entries[1];
int nr_entries;
nr_entries = radix_tree_gang_lookup(&sih->tree,
(void **)entries, pgoff, 1);
if (nr_entries == 1)
entry = entries[0];
return entry;
}
/*
* Zero the tail page. Used in resize request
* to avoid to keep data in case the file grows again.
*/
void nova_clear_last_page_tail(struct super_block *sb,
struct inode *inode, loff_t newsize)
{
struct nova_sb_info *sbi = NOVA_SB(sb);
struct nova_inode_info *si = NOVA_I(inode);
struct nova_inode_info_header *sih = &si->header;
unsigned long offset = newsize & (sb->s_blocksize - 1);
unsigned long pgoff, length;
u64 nvmm;
char *nvmm_addr;
unsigned long irq_flags = 0;
if (offset == 0 || newsize > inode->i_size)
return;
length = sb->s_blocksize - offset;
pgoff = newsize >> sb->s_blocksize_bits;
nvmm = nova_find_nvmm_block(sb, sih, NULL, pgoff);
if (nvmm == 0)
return;
nvmm_addr = (char *)nova_get_block(sb, nvmm);
nova_memunlock_range(sb, nvmm_addr + offset, length, &irq_flags);
memcpy_to_pmem_nocache(nvmm_addr + offset, sbi->zeroed_page, length);
nova_memlock_range(sb, nvmm_addr + offset, length, &irq_flags);
if (data_csum > 0)
nova_update_truncated_block_csum(sb, inode, newsize);
if (data_parity > 0)
nova_update_truncated_block_parity(sb, inode, newsize);
}
static void nova_update_setattr_entry(struct inode *inode,
struct nova_setattr_logentry *entry,
struct nova_log_entry_info *entry_info)
{
struct iattr *attr = entry_info->attr;
unsigned int ia_valid = attr->ia_valid, attr_mask;
/* These files are in the lowest byte */
attr_mask = ATTR_MODE | ATTR_UID | ATTR_GID | ATTR_SIZE |
ATTR_ATIME | ATTR_MTIME | ATTR_CTIME;
entry->entry_type = SET_ATTR;
entry->attr = ia_valid & attr_mask;
entry->mode = cpu_to_le16(inode->i_mode);
entry->uid = cpu_to_le32(i_uid_read(inode));
entry->gid = cpu_to_le32(i_gid_read(inode));
entry->atime = cpu_to_le32(inode->i_atime.tv_sec);
entry->ctime = cpu_to_le32(inode->i_ctime.tv_sec);
entry->mtime = cpu_to_le32(inode->i_mtime.tv_sec);
entry->epoch_id = cpu_to_le64(entry_info->epoch_id);
entry->trans_id = cpu_to_le64(entry_info->trans_id);
entry->invalid = 0;
if (ia_valid & ATTR_SIZE)
entry->size = cpu_to_le64(attr->ia_size);
else
entry->size = cpu_to_le64(inode->i_size);
nova_update_entry_csum(entry);
}
static void nova_update_link_change_entry(struct inode *inode,
struct nova_link_change_entry *entry,
struct nova_log_entry_info *entry_info)
{
struct nova_inode_info *si = NOVA_I(inode);
struct nova_inode_info_header *sih = &si->header;
entry->entry_type = LINK_CHANGE;
entry->epoch_id = cpu_to_le64(entry_info->epoch_id);
entry->trans_id = cpu_to_le64(entry_info->trans_id);
entry->invalid = 0;
entry->links = cpu_to_le16(inode->i_nlink);
entry->ctime = cpu_to_le32(inode->i_ctime.tv_sec);
entry->flags = cpu_to_le32(sih->i_flags);
entry->generation = cpu_to_le32(inode->i_generation);
nova_update_entry_csum(entry);
}
static int nova_update_write_entry(struct super_block *sb,
struct nova_file_write_entry *entry,
struct nova_log_entry_info *entry_info)
{
entry->block = cpu_to_le64(entry_info->block);
entry->epoch_id = cpu_to_le64(entry_info->epoch_id);
entry->trans_id = cpu_to_le64(entry_info->trans_id);
entry->mtime = cpu_to_le32(entry_info->time);
entry->size = cpu_to_le64(entry_info->file_size);
entry->updating = 0;
nova_update_entry_csum(entry);
return 0;
}
static int nova_update_old_dentry(struct super_block *sb,
struct inode *dir, struct nova_dentry *dentry,
struct nova_log_entry_info *entry_info)
{
unsigned short links_count;
int link_change = entry_info->link_change;
u64 addr;
dentry->epoch_id = entry_info->epoch_id;
dentry->trans_id = entry_info->trans_id;
/* Remove_dentry */
dentry->ino = cpu_to_le64(0);
dentry->invalid = 1;
dentry->mtime = cpu_to_le32(dir->i_mtime.tv_sec);
links_count = cpu_to_le16(dir->i_nlink);
if (links_count == 0 && link_change == -1)
links_count = 0;
else
links_count += link_change;
dentry->links_count = cpu_to_le16(links_count);
addr = nova_get_addr_off(NOVA_SB(sb), dentry);
nova_inc_page_invalid_entries(sb, addr);
/* Update checksum */
nova_update_entry_csum(dentry);
return 0;
}
static int nova_update_new_dentry(struct super_block *sb,
struct inode *dir, struct nova_dentry *entry,
struct nova_log_entry_info *entry_info)
{
struct dentry *dentry = entry_info->data;
unsigned short links_count;
int link_change = entry_info->link_change;
entry->entry_type = DIR_LOG;
entry->epoch_id = entry_info->epoch_id;
entry->trans_id = entry_info->trans_id;
entry->ino = entry_info->ino;
entry->name_len = dentry->d_name.len;
memcpy_to_pmem_nocache(entry->name, dentry->d_name.name,
dentry->d_name.len);
entry->name[dentry->d_name.len] = '\0';
entry->mtime = cpu_to_le32(dir->i_mtime.tv_sec);
//entry->size = cpu_to_le64(dir->i_size);
links_count = cpu_to_le16(dir->i_nlink);
if (links_count == 0 && link_change == -1)
links_count = 0;
else
links_count += link_change;
entry->links_count = cpu_to_le16(links_count);
/* Update actual de_len */
entry->de_len = cpu_to_le16(entry_info->file_size);
/* Update checksum */
nova_update_entry_csum(entry);
return 0;
}
static int nova_update_log_entry(struct super_block *sb, struct inode *inode,
void *entry, struct nova_log_entry_info *entry_info)
{
enum nova_entry_type type = entry_info->type;
switch (type) {
case FILE_WRITE:
if (entry_info->inplace)
nova_update_write_entry(sb, entry, entry_info);
else {
// memcpy_to_pmem_nocache(entry, entry_info->data,
// sizeof(struct nova_file_write_entry));
memcpy(entry, entry_info->data, sizeof(struct nova_file_write_entry));
nova_flush_buffer(entry, sizeof(struct nova_file_write_entry), 1);
}
break;
case DIR_LOG:
if (entry_info->inplace)
nova_update_old_dentry(sb, inode, entry, entry_info);
else
nova_update_new_dentry(sb, inode, entry, entry_info);
break;
case SET_ATTR:
nova_update_setattr_entry(inode, entry, entry_info);
break;
case LINK_CHANGE:
nova_update_link_change_entry(inode, entry, entry_info);
break;
case MMAP_WRITE:
memcpy_to_pmem_nocache(entry, entry_info->data,
sizeof(struct nova_mmap_entry));
break;
case SNAPSHOT_INFO:
memcpy_to_pmem_nocache(entry, entry_info->data,
sizeof(struct nova_snapshot_info_entry));
break;
default:
break;
}
return 0;
}
static int nova_append_log_entry(struct super_block *sb,
struct nova_inode *pi, struct inode *inode,
struct nova_inode_info_header *sih,
struct nova_log_entry_info *entry_info)
{
void *entry, *alter_entry;
enum nova_entry_type type = entry_info->type;
struct nova_inode_update *update = entry_info->update;
u64 tail, alter_tail;
u64 curr_p, alter_curr_p;
size_t size;
int extended = 0;
unsigned long irq_flags = 0;
if (type == DIR_LOG)
size = entry_info->file_size;
else
size = nova_get_log_entry_size(sb, type);
tail = update->tail;
alter_tail = update->alter_tail;
curr_p = nova_get_append_head(sb, pi, sih, tail, size,
MAIN_LOG, 0, &extended);
if (curr_p == 0)
return -ENOSPC;
nova_dbg_verbose("%s: inode %lu attr change entry @ 0x%llx\n",
__func__, sih->ino, curr_p);
entry = nova_get_block(sb, curr_p);
/* inode is already updated with attr */
nova_memunlock_range(sb, entry, size, &irq_flags);
nova_inc_page_num_entries(sb, curr_p);
// memset(entry, 0, size);
nova_update_log_entry(sb, inode, entry, entry_info);
nova_memlock_range(sb, entry, size, &irq_flags);
update->curr_entry = curr_p;
update->tail = curr_p + size;
if (metadata_csum) {
alter_curr_p = nova_get_append_head(sb, pi, sih, alter_tail,
size, ALTER_LOG, 0, &extended);
if (alter_curr_p == 0)
return -ENOSPC;
alter_entry = nova_get_block(sb, alter_curr_p);
nova_memunlock_range(sb, alter_entry, size, &irq_flags);
memset(alter_entry, 0, size);
nova_update_log_entry(sb, inode, alter_entry, entry_info);
nova_memlock_range(sb, alter_entry, size, &irq_flags);
update->alter_entry = alter_curr_p;
update->alter_tail = alter_curr_p + size;
}
entry_info->curr_p = curr_p;
if (type == FILE_WRITE)
nova_assign_write_entry(sb, sih, entry, entry, true);
return 0;
}
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;
unsigned long irq_flags = 0;
INIT_TIMING(update_time);
NOVA_START_TIMING(update_entry_t, update_time);
size = nova_get_log_entry_size(sb, type);
if (metadata_csum) {
nova_memunlock_range(sb, entry, size, &irq_flags);
nova_update_log_entry(sb, inode, entry, entry_info);
// Also update the alter inode log entry.
nova_update_alter_entry(sb, entry);
nova_memlock_range(sb, entry, size, &irq_flags);
goto out;
}
cpu = nova_get_cpuid(sb);
spin_lock(&sbi->journal_locks[cpu]);
nova_memunlock_journal(sb, &irq_flags);
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);
nova_memlock_journal(sb, &irq_flags);
spin_unlock(&sbi->journal_locks[cpu]);
out:
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,
struct nova_inode_update *update, u64 *last_setattr, u64 epoch_id)
{
struct nova_inode_info *si = NOVA_I(inode);
struct nova_inode_info_header *sih = &si->header;
struct nova_inode inode_copy;
struct nova_log_entry_info entry_info;
INIT_TIMING(append_time);
int ret;
NOVA_START_TIMING(append_setattr_t, append_time);
entry_info.type = SET_ATTR;
entry_info.attr = attr;
entry_info.update = update;
entry_info.epoch_id = epoch_id;
entry_info.trans_id = sih->trans_id;
if (nova_check_inode_integrity(sb, sih->ino, sih->pi_addr,
sih->alter_pi_addr, &inode_copy, 0) < 0) {
ret = -EIO;
goto out;
}
ret = nova_append_log_entry(sb, pi, inode, sih, &entry_info);
if (ret) {
nova_err(sb, "%s failed\n", __func__);
goto out;
}
*last_setattr = sih->last_setattr;
sih->last_setattr = entry_info.curr_p;
out:
NOVA_END_TIMING(append_setattr_t, append_time);
return ret;
}
/* Invalidate old link change entry */
static int nova_invalidate_setattr_entry(struct super_block *sb,
u64 last_setattr)
{
struct nova_setattr_logentry *old_entry;
struct nova_setattr_logentry *old_entryc, old_entry_copy;
void *addr;
int ret;
addr = (void *)nova_get_block(sb, last_setattr);
old_entry = (struct nova_setattr_logentry *)addr;
if (metadata_csum == 0)
old_entryc = old_entry;
else {
old_entryc = &old_entry_copy;
if (!nova_verify_entry_csum(sb, old_entry, old_entryc))
return -EIO;
}
/* Do not invalidate setsize entries */
if (!old_entry_freeable(sb, old_entryc->epoch_id) ||
(old_entryc->attr & ATTR_SIZE))
return 0;
ret = nova_invalidate_logentry(sb, old_entry, SET_ATTR, 0);
return ret;
}
#if 0
static void setattr_copy_to_nova_inode(struct super_block *sb,
struct inode *inode, struct nova_inode *pi, u64 epoch_id)
{
pi->i_mode = cpu_to_le16(inode->i_mode);
pi->i_uid = cpu_to_le32(i_uid_read(inode));
pi->i_gid = cpu_to_le32(i_gid_read(inode));
pi->i_atime = cpu_to_le32(inode->i_atime.tv_sec);
pi->i_ctime = cpu_to_le32(inode->i_ctime.tv_sec);
pi->i_mtime = cpu_to_le32(inode->i_mtime.tv_sec);
pi->create_epoch_id = epoch_id;
nova_update_alter_inode(sb, inode, pi);
}
#endif
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;
unsigned long irq_flags = 0;
if (ia_valid & ATTR_MODE)
sih->i_mode = inode->i_mode;
/*
* Let's try to do inplace update.
* If there are currently no snapshots holding this inode,
* we can update the inode in place. If a snapshot creation
* is in progress, we will use the create_snapshot_epoch_id
* as the latest snapshot id.
*/
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 = update.alter_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_memunlock_inode(sb, pi, &irq_flags);
nova_update_inode(sb, inode, pi, &update, 1);
nova_memlock_inode(sb, pi, &irq_flags);
}
/* 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;
struct nova_link_change_entry *old_entryc, old_entry_copy;
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 (metadata_csum == 0)
old_entryc = old_entry;
else {
old_entryc = &old_entry_copy;
if (!nova_verify_entry_csum(sb, old_entry, old_entryc))
return -EIO;
}
if (!old_entry_freeable(sb, old_entryc->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)
{
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,
struct nova_inode_update *update, u64 *old_linkc, u64 epoch_id)
{
struct nova_inode_info *si = NOVA_I(inode);
struct nova_inode_info_header *sih = &si->header;
struct nova_inode inode_copy;
struct nova_log_entry_info entry_info;
int ret = 0;
INIT_TIMING(append_time);
NOVA_START_TIMING(append_link_change_t, append_time);
if (nova_check_inode_integrity(sb, sih->ino, sih->pi_addr,
sih->alter_pi_addr, &inode_copy, 0) < 0) {
ret = -EIO;
goto out;
}
if (nova_can_inplace_update_lcentry(sb, sih, epoch_id)) {
nova_inplace_update_lcentry(sb, inode, sih, epoch_id);
update->tail = sih->log_tail;
update->alter_tail = sih->alter_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;
entry_info.trans_id = sih->trans_id;
ret = nova_append_log_entry(sb, pi, inode, sih, &entry_info);
if (ret) {
nova_err(sb, "%s failed\n", __func__);
goto out;
}
*old_linkc = sih->last_link_change;
sih->last_link_change = entry_info.curr_p;
sih->trans_id++;
out:
NOVA_END_TIMING(append_link_change_t, append_time);
return ret;
}
int nova_assign_write_entry(struct super_block *sb,
struct nova_inode_info_header *sih,
struct nova_file_write_entry *entry,
struct nova_file_write_entry *entryc,
bool free)
{
struct nova_file_write_entry *old_entry;
struct nova_file_write_entry *start_old_entry = NULL;
void **pentry;
unsigned long start_pgoff = entryc->pgoff;
unsigned long start_old_pgoff = 0;
unsigned int num = entryc->num_pages;
unsigned int num_free = 0;
unsigned long curr_pgoff;
int i;
int ret = 0;
INIT_TIMING(assign_time);
NOVA_START_TIMING(assign_t, assign_time);
for (i = 0; i < num; i++) {
curr_pgoff = start_pgoff + i;
pentry = radix_tree_lookup_slot(&sih->tree, curr_pgoff);
if (pentry) {
old_entry = radix_tree_deref_slot(pentry);
if (old_entry != start_old_entry) {
if (start_old_entry && free)
nova_free_old_entry(sb, sih,
start_old_entry,
start_old_pgoff,
num_free, false,
entryc->epoch_id);
nova_invalidate_write_entry(sb,
start_old_entry, 1, 0);
start_old_entry = old_entry;
start_old_pgoff = curr_pgoff;
num_free = 1;
} else {
num_free++;
}
radix_tree_replace_slot(&sih->tree, pentry, entry);
} else {
ret = radix_tree_insert(&sih->tree, curr_pgoff, entry);
if (ret) {
nova_dbg("%s: ERROR %d\n", __func__, ret);
goto out;
}
}
}
if (start_old_entry && free)
nova_free_old_entry(sb, sih, start_old_entry,
start_old_pgoff, num_free, false,
entryc->epoch_id);
nova_invalidate_write_entry(sb, start_old_entry, 1, 0);
out:
NOVA_END_TIMING(assign_t, assign_time);
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);
}
int nova_set_write_entry_updating(struct super_block *sb,
struct nova_file_write_entry *entry, int set)
{
unsigned long irq_flags = 0;
nova_memunlock_range(sb, entry, sizeof(*entry), &irq_flags);
entry->updating = set ? 1 : 0;
nova_update_entry_csum(entry);
nova_update_alter_entry(sb, entry);
nova_memlock_range(sb, entry, sizeof(*entry), &irq_flags);
return 0;
}
/*
* Append a nova_file_write_entry to the current nova_inode_log_page.
* blocknr and start_blk are pgoff.
* We cannot update pi->log_tail here because a transaction may contain
* multiple entries.
*/
int nova_append_file_write_entry(struct super_block *sb, struct nova_inode *pi,
struct inode *inode, struct nova_file_write_entry *data,
struct nova_inode_update *update)
{
struct nova_inode_info *si = NOVA_I(inode);
struct nova_inode_info_header *sih = &si->header;
struct nova_log_entry_info entry_info;
INIT_TIMING(append_time);
int ret;
NOVA_START_TIMING(append_file_entry_t, append_time);
nova_update_entry_csum(data);
entry_info.type = FILE_WRITE;
entry_info.update = update;
entry_info.data = data;
entry_info.epoch_id = data->epoch_id;
entry_info.trans_id = data->trans_id;
entry_info.inplace = 0;
ret = nova_append_log_entry(sb, pi, inode, sih, &entry_info);
if (ret)
nova_err(sb, "%s failed\n", __func__);
NOVA_END_TIMING(append_file_entry_t, append_time);
return ret;
}
int nova_append_mmap_entry(struct super_block *sb, struct nova_inode *pi,
struct inode *inode, struct nova_mmap_entry *data,
struct nova_inode_update *update, struct vma_item *item)
{
struct nova_inode_info *si = NOVA_I(inode);
struct nova_inode_info_header *sih = &si->header;
struct nova_inode inode_copy;
struct nova_log_entry_info entry_info;
INIT_TIMING(append_time);
int ret;
NOVA_START_TIMING(append_mmap_entry_t, append_time);
nova_update_entry_csum(data);
entry_info.type = MMAP_WRITE;
entry_info.update = update;
entry_info.data = data;
entry_info.epoch_id = data->epoch_id;
if (nova_check_inode_integrity(sb, sih->ino, sih->pi_addr,
sih->alter_pi_addr, &inode_copy, 0) < 0) {
ret = -EIO;
goto out;
}
ret = nova_append_log_entry(sb, pi, inode, sih, &entry_info);
if (ret)
nova_err(sb, "%s failed\n", __func__);
item->mmap_entry = entry_info.curr_p;
out:
NOVA_END_TIMING(append_mmap_entry_t, append_time);
return ret;
}
int nova_append_snapshot_info_entry(struct super_block *sb,
struct nova_inode *pi, struct nova_inode_info *si,
struct snapshot_info *info, struct nova_snapshot_info_entry *data,
struct nova_inode_update *update)
{
struct nova_inode_info_header *sih = &si->header;
struct nova_inode inode_copy;
struct nova_log_entry_info entry_info;
INIT_TIMING(append_time);
int ret;
NOVA_START_TIMING(append_snapshot_info_t, append_time);
nova_update_entry_csum(data);
entry_info.type = SNAPSHOT_INFO;
entry_info.update = update;
entry_info.data = data;
entry_info.epoch_id = data->epoch_id;
entry_info.inplace = 0;
if (nova_check_inode_integrity(sb, sih->ino, sih->pi_addr,
sih->alter_pi_addr, &inode_copy, 0) < 0) {
ret = -EIO;
goto out;
}
ret = nova_append_log_entry(sb, pi, NULL, sih, &entry_info);
if (ret)
nova_err(sb, "%s failed\n", __func__);
info->snapshot_entry = entry_info.curr_p;
out:
NOVA_END_TIMING(append_snapshot_info_t, append_time);
return ret;
}
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,
int link_change, u64 epoch_id)
{