simplify checks for I_CLEAR/I_FREEING
add I_CLEAR instead of replacing I_FREEING with it. I_CLEAR is
equivalent to I_FREEING for almost all code looking at either;
it's there to keep track of having called clear_inode() exactly
once per inode lifetime, at some point after having set I_FREEING.
I_CLEAR and I_FREEING never get set at the same time with the
current code, so we can switch to setting i_flags to I_FREEING | I_CLEAR
instead of I_CLEAR without loss of information. As the result of
such change, checks become simpler and the amount of code that needs
to know about I_CLEAR shrinks a lot.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 7f9e053..95eac01 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -3860,7 +3860,7 @@
p = &parent->rb_right;
else {
WARN_ON(!(entry->vfs_inode.i_state &
- (I_WILL_FREE | I_FREEING | I_CLEAR)));
+ (I_WILL_FREE | I_FREEING)));
rb_erase(parent, &root->inode_tree);
RB_CLEAR_NODE(parent);
spin_unlock(&root->inode_lock);
diff --git a/fs/drop_caches.c b/fs/drop_caches.c
index 83c4f60..2195c21 100644
--- a/fs/drop_caches.c
+++ b/fs/drop_caches.c
@@ -18,7 +18,7 @@
spin_lock(&inode_lock);
list_for_each_entry(inode, &sb->s_inodes, i_sb_list) {
- if (inode->i_state & (I_FREEING|I_CLEAR|I_WILL_FREE|I_NEW))
+ if (inode->i_state & (I_FREEING|I_WILL_FREE|I_NEW))
continue;
if (inode->i_mapping->nrpages == 0)
continue;
diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index d5be169..7608880 100644
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c
@@ -352,7 +352,7 @@
spin_lock(&inode_lock);
inode->i_state &= ~I_SYNC;
- if (!(inode->i_state & (I_FREEING | I_CLEAR))) {
+ if (!(inode->i_state & I_FREEING)) {
if ((inode->i_state & I_DIRTY_PAGES) && wbc->for_kupdate) {
/*
* More pages get dirtied by a fast dirtier.
@@ -499,7 +499,7 @@
if (inode_dirtied_after(inode, wbc->wb_start))
return 1;
- BUG_ON(inode->i_state & (I_FREEING | I_CLEAR));
+ BUG_ON(inode->i_state & I_FREEING);
__iget(inode);
pages_skipped = wbc->pages_skipped;
writeback_single_inode(inode, wbc);
@@ -935,7 +935,7 @@
if (hlist_unhashed(&inode->i_hash))
goto out;
}
- if (inode->i_state & (I_FREEING|I_CLEAR))
+ if (inode->i_state & I_FREEING)
goto out;
/*
@@ -1001,7 +1001,7 @@
list_for_each_entry(inode, &sb->s_inodes, i_sb_list) {
struct address_space *mapping;
- if (inode->i_state & (I_FREEING|I_CLEAR|I_WILL_FREE|I_NEW))
+ if (inode->i_state & (I_FREEING|I_WILL_FREE|I_NEW))
continue;
mapping = inode->i_mapping;
if (mapping->nrpages == 0)
diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
index 6c023a3..08140f1 100644
--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -84,7 +84,7 @@
struct gfs2_skip_data *data = opaque;
if (ip->i_no_addr == data->no_addr) {
- if (inode->i_state & (I_FREEING|I_CLEAR|I_WILL_FREE)){
+ if (inode->i_state & (I_FREEING|I_WILL_FREE)){
data->skipped = 1;
return 0;
}
diff --git a/fs/inode.c b/fs/inode.c
index 722860b..71fe079 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -317,7 +317,7 @@
bd_forget(inode);
if (S_ISCHR(inode->i_mode) && inode->i_cdev)
cd_forget(inode);
- inode->i_state = I_CLEAR;
+ inode->i_state = I_FREEING | I_CLEAR;
}
EXPORT_SYMBOL(clear_inode);
@@ -553,7 +553,7 @@
continue;
if (!test(inode, data))
continue;
- if (inode->i_state & (I_FREEING|I_CLEAR|I_WILL_FREE)) {
+ if (inode->i_state & (I_FREEING|I_WILL_FREE)) {
__wait_on_freeing_inode(inode);
goto repeat;
}
@@ -578,7 +578,7 @@
continue;
if (inode->i_sb != sb)
continue;
- if (inode->i_state & (I_FREEING|I_CLEAR|I_WILL_FREE)) {
+ if (inode->i_state & (I_FREEING|I_WILL_FREE)) {
__wait_on_freeing_inode(inode);
goto repeat;
}
@@ -840,7 +840,7 @@
struct inode *igrab(struct inode *inode)
{
spin_lock(&inode_lock);
- if (!(inode->i_state & (I_FREEING|I_CLEAR|I_WILL_FREE)))
+ if (!(inode->i_state & (I_FREEING|I_WILL_FREE)))
__iget(inode);
else
/*
@@ -1089,7 +1089,7 @@
continue;
if (old->i_sb != sb)
continue;
- if (old->i_state & (I_FREEING|I_CLEAR|I_WILL_FREE))
+ if (old->i_state & (I_FREEING|I_WILL_FREE))
continue;
break;
}
@@ -1128,7 +1128,7 @@
continue;
if (!test(old, data))
continue;
- if (old->i_state & (I_FREEING|I_CLEAR|I_WILL_FREE))
+ if (old->i_state & (I_FREEING|I_WILL_FREE))
continue;
break;
}
@@ -1218,7 +1218,7 @@
hlist_del_init(&inode->i_hash);
spin_unlock(&inode_lock);
wake_up_inode(inode);
- BUG_ON(inode->i_state != I_CLEAR);
+ BUG_ON(inode->i_state != (I_FREEING | I_CLEAR));
destroy_inode(inode);
}
EXPORT_SYMBOL(generic_delete_inode);
@@ -1322,7 +1322,7 @@
void iput(struct inode *inode)
{
if (inode) {
- BUG_ON(inode->i_state == I_CLEAR);
+ BUG_ON(inode->i_state & I_CLEAR);
if (atomic_dec_and_lock(&inode->i_count, &inode_lock))
iput_final(inode);
diff --git a/fs/nilfs2/gcdat.c b/fs/nilfs2/gcdat.c
index dd5f7e0..84a45d1 100644
--- a/fs/nilfs2/gcdat.c
+++ b/fs/nilfs2/gcdat.c
@@ -78,7 +78,7 @@
struct inode *gcdat = nilfs->ns_gc_dat;
struct nilfs_inode_info *gii = NILFS_I(gcdat);
- gcdat->i_state = I_CLEAR;
+ gcdat->i_state = I_FREEING | I_CLEAR;
gii->i_flags = 0;
nilfs_palloc_clear_cache(gcdat);
diff --git a/fs/notify/inode_mark.c b/fs/notify/inode_mark.c
index 0399bcb..152b83e 100644
--- a/fs/notify/inode_mark.c
+++ b/fs/notify/inode_mark.c
@@ -369,11 +369,11 @@
struct inode *need_iput_tmp;
/*
- * We cannot __iget() an inode in state I_CLEAR, I_FREEING,
+ * We cannot __iget() an inode in state I_FREEING,
* I_WILL_FREE, or I_NEW which is fine because by that point
* the inode cannot have any associated watches.
*/
- if (inode->i_state & (I_CLEAR|I_FREEING|I_WILL_FREE|I_NEW))
+ if (inode->i_state & (I_FREEING|I_WILL_FREE|I_NEW))
continue;
/*
@@ -397,7 +397,7 @@
/* In case the dropping of a reference would nuke next_i. */
if ((&next_i->i_sb_list != list) &&
atomic_read(&next_i->i_count) &&
- !(next_i->i_state & (I_CLEAR | I_FREEING | I_WILL_FREE))) {
+ !(next_i->i_state & (I_FREEING | I_WILL_FREE))) {
__iget(next_i);
need_iput = next_i;
}
diff --git a/fs/notify/inotify/inotify.c b/fs/notify/inotify/inotify.c
index 27b75eb..cf6b042 100644
--- a/fs/notify/inotify/inotify.c
+++ b/fs/notify/inotify/inotify.c
@@ -377,11 +377,11 @@
struct list_head *watches;
/*
- * We cannot __iget() an inode in state I_CLEAR, I_FREEING,
+ * We cannot __iget() an inode in state I_FREEING,
* I_WILL_FREE, or I_NEW which is fine because by that point
* the inode cannot have any associated watches.
*/
- if (inode->i_state & (I_CLEAR|I_FREEING|I_WILL_FREE|I_NEW))
+ if (inode->i_state & (I_FREEING|I_WILL_FREE|I_NEW))
continue;
/*
@@ -403,8 +403,7 @@
/* In case the dropping of a reference would nuke next_i. */
if ((&next_i->i_sb_list != list) &&
atomic_read(&next_i->i_count) &&
- !(next_i->i_state & (I_CLEAR | I_FREEING |
- I_WILL_FREE))) {
+ !(next_i->i_state & (I_FREEING|I_WILL_FREE))) {
__iget(next_i);
need_iput = next_i;
}
diff --git a/fs/quota/dquot.c b/fs/quota/dquot.c
index 437d2ca..5cec3e2 100644
--- a/fs/quota/dquot.c
+++ b/fs/quota/dquot.c
@@ -885,7 +885,7 @@
spin_lock(&inode_lock);
list_for_each_entry(inode, &sb->s_inodes, i_sb_list) {
- if (inode->i_state & (I_FREEING|I_CLEAR|I_WILL_FREE|I_NEW))
+ if (inode->i_state & (I_FREEING|I_WILL_FREE|I_NEW))
continue;
#ifdef CONFIG_QUOTA_DEBUG
if (unlikely(inode_get_rsv_space(inode) > 0))
diff --git a/fs/xfs/linux-2.6/xfs_iops.c b/fs/xfs/linux-2.6/xfs_iops.c
index 62dd349..68be25d 100644
--- a/fs/xfs/linux-2.6/xfs_iops.c
+++ b/fs/xfs/linux-2.6/xfs_iops.c
@@ -80,7 +80,7 @@
{
struct inode *inode = VFS_I(ip);
- if (!(inode->i_state & (I_WILL_FREE|I_FREEING|I_CLEAR)))
+ if (!(inode->i_state & (I_WILL_FREE|I_FREEING)))
mark_inode_dirty_sync(inode);
}
@@ -90,7 +90,7 @@
{
struct inode *inode = VFS_I(ip);
- if (!(inode->i_state & (I_WILL_FREE|I_FREEING|I_CLEAR)))
+ if (!(inode->i_state & (I_WILL_FREE|I_FREEING)))
mark_inode_dirty(inode);
}
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 5547b1b..218693d 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1616,8 +1616,8 @@
* I_FREEING Set when inode is about to be freed but still has dirty
* pages or buffers attached or the inode itself is still
* dirty.
- * I_CLEAR Set by clear_inode(). In this state the inode is clean
- * and can be destroyed.
+ * I_CLEAR Added by clear_inode(). In this state the inode is clean
+ * and can be destroyed. Inode keeps I_FREEING.
*
* Inodes that are I_WILL_FREE, I_FREEING or I_CLEAR are
* prohibited for many purposes. iget() must wait for
