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-rw-r--r--fs/9p/vfs_inode.c5
-rw-r--r--fs/affs/inode.c2
-rw-r--r--fs/afs/dir.c2
-rw-r--r--fs/aio.c5
-rw-r--r--fs/anon_inodes.c5
-rw-r--r--fs/bfs/dir.c2
-rw-r--r--fs/block_dev.c8
-rw-r--r--fs/btrfs/inode.c2
-rw-r--r--fs/coda/dir.c2
-rw-r--r--fs/exofs/namei.c2
-rw-r--r--fs/ext2/namei.c2
-rw-r--r--fs/ext3/namei.c2
-rw-r--r--fs/ext4/namei.c2
-rw-r--r--fs/gfs2/ops_inode.c2
-rw-r--r--fs/hfsplus/dir.c2
-rw-r--r--fs/inode.c9
-rw-r--r--fs/jffs2/dir.c4
-rw-r--r--fs/jfs/jfs_txnmgr.c2
-rw-r--r--fs/jfs/namei.c2
-rw-r--r--fs/libfs.c2
-rw-r--r--fs/logfs/dir.c2
-rw-r--r--fs/minix/namei.c2
-rw-r--r--fs/namei.c2
-rw-r--r--fs/nfs/dir.c2
-rw-r--r--fs/nfs/getroot.c3
-rw-r--r--fs/nilfs2/namei.c2
-rw-r--r--fs/ntfs/super.c4
-rw-r--r--fs/ocfs2/namei.c2
-rw-r--r--fs/reiserfs/namei.c2
-rw-r--r--fs/sysv/namei.c2
-rw-r--r--fs/ubifs/dir.c2
-rw-r--r--fs/udf/namei.c2
-rw-r--r--fs/ufs/namei.c2
-rw-r--r--fs/xfs/linux-2.6/xfs_iops.c2
-rw-r--r--fs/xfs/xfs_inode.h2
35 files changed, 52 insertions, 45 deletions
diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c
index 9e670d52764..ef5905f7c8a 100644
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -1789,9 +1789,10 @@ v9fs_vfs_link_dotl(struct dentry *old_dentry, struct inode *dir,
kfree(st);
} else {
/* Caching disabled. No need to get upto date stat info.
- * This dentry will be released immediately. So, just i_count++
+ * This dentry will be released immediately. So, just hold the
+ * inode
*/
- atomic_inc(&old_dentry->d_inode->i_count);
+ ihold(old_dentry->d_inode);
}
dentry->d_op = old_dentry->d_op;
diff --git a/fs/affs/inode.c b/fs/affs/inode.c
index 3a0fdec175b..5d828903ac6 100644
--- a/fs/affs/inode.c
+++ b/fs/affs/inode.c
@@ -388,7 +388,7 @@ affs_add_entry(struct inode *dir, struct inode *inode, struct dentry *dentry, s3
affs_adjust_checksum(inode_bh, block - be32_to_cpu(chain));
mark_buffer_dirty_inode(inode_bh, inode);
inode->i_nlink = 2;
- atomic_inc(&inode->i_count);
+ ihold(inode);
}
affs_fix_checksum(sb, bh);
mark_buffer_dirty_inode(bh, inode);
diff --git a/fs/afs/dir.c b/fs/afs/dir.c
index 0d38c09bd55..5439e1bc9a8 100644
--- a/fs/afs/dir.c
+++ b/fs/afs/dir.c
@@ -1045,7 +1045,7 @@ static int afs_link(struct dentry *from, struct inode *dir,
if (ret < 0)
goto link_error;
- atomic_inc(&vnode->vfs_inode.i_count);
+ ihold(&vnode->vfs_inode);
d_instantiate(dentry, &vnode->vfs_inode);
key_put(key);
_leave(" = 0");
diff --git a/fs/aio.c b/fs/aio.c
index 9e319a04780..8c8f6c5b6d7 100644
--- a/fs/aio.c
+++ b/fs/aio.c
@@ -1553,10 +1553,9 @@ static void aio_batch_add(struct address_space *mapping,
*
* When we're called, we always have a reference
* on the file, so we must always have a reference
- * on the inode, so igrab must always just
- * bump the count and move on.
+ * on the inode, so ihold() is safe here.
*/
- atomic_inc(&mapping->host->i_count);
+ ihold(mapping->host);
abe->mapping = mapping;
hlist_add_head(&abe->list, &batch_hash[bucket]);
return;
diff --git a/fs/anon_inodes.c b/fs/anon_inodes.c
index e4b75d6eda8..9c8e87b0361 100644
--- a/fs/anon_inodes.c
+++ b/fs/anon_inodes.c
@@ -111,10 +111,9 @@ struct file *anon_inode_getfile(const char *name,
path.mnt = mntget(anon_inode_mnt);
/*
* We know the anon_inode inode count is always greater than zero,
- * so we can avoid doing an igrab() and we can use an open-coded
- * atomic_inc().
+ * so ihold() is safe.
*/
- atomic_inc(&anon_inode_inode->i_count);
+ ihold(anon_inode_inode);
path.dentry->d_op = &anon_inodefs_dentry_operations;
d_instantiate(path.dentry, anon_inode_inode);
diff --git a/fs/bfs/dir.c b/fs/bfs/dir.c
index d967e052b77..685ecff3ab3 100644
--- a/fs/bfs/dir.c
+++ b/fs/bfs/dir.c
@@ -176,7 +176,7 @@ static int bfs_link(struct dentry *old, struct inode *dir,
inc_nlink(inode);
inode->i_ctime = CURRENT_TIME_SEC;
mark_inode_dirty(inode);
- atomic_inc(&inode->i_count);
+ ihold(inode);
d_instantiate(new, inode);
mutex_unlock(&info->bfs_lock);
return 0;
diff --git a/fs/block_dev.c b/fs/block_dev.c
index b737451e2e9..81972eb34b3 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -550,7 +550,7 @@ EXPORT_SYMBOL(bdget);
*/
struct block_device *bdgrab(struct block_device *bdev)
{
- atomic_inc(&bdev->bd_inode->i_count);
+ ihold(bdev->bd_inode);
return bdev;
}
@@ -580,7 +580,7 @@ static struct block_device *bd_acquire(struct inode *inode)
spin_lock(&bdev_lock);
bdev = inode->i_bdev;
if (bdev) {
- atomic_inc(&bdev->bd_inode->i_count);
+ ihold(bdev->bd_inode);
spin_unlock(&bdev_lock);
return bdev;
}
@@ -591,12 +591,12 @@ static struct block_device *bd_acquire(struct inode *inode)
spin_lock(&bdev_lock);
if (!inode->i_bdev) {
/*
- * We take an additional bd_inode->i_count for inode,
+ * We take an additional reference to bd_inode,
* and it's released in clear_inode() of inode.
* So, we can access it via ->i_mapping always
* without igrab().
*/
- atomic_inc(&bdev->bd_inode->i_count);
+ ihold(bdev->bd_inode);
inode->i_bdev = bdev;
inode->i_mapping = bdev->bd_inode->i_mapping;
list_add(&inode->i_devices, &bdev->bd_inodes);
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index f6f2a0da269..64f99cf69ce 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -4758,7 +4758,7 @@ static int btrfs_link(struct dentry *old_dentry, struct inode *dir,
}
btrfs_set_trans_block_group(trans, dir);
- atomic_inc(&inode->i_count);
+ ihold(inode);
err = btrfs_add_nondir(trans, dentry, inode, 1, index);
diff --git a/fs/coda/dir.c b/fs/coda/dir.c
index 96fbeab77f2..5d8b3553960 100644
--- a/fs/coda/dir.c
+++ b/fs/coda/dir.c
@@ -276,7 +276,7 @@ static int coda_link(struct dentry *source_de, struct inode *dir_inode,
}
coda_dir_update_mtime(dir_inode);
- atomic_inc(&inode->i_count);
+ ihold(inode);
d_instantiate(de, inode);
inc_nlink(inode);
return 0;
diff --git a/fs/exofs/namei.c b/fs/exofs/namei.c
index b7dd0c23686..264e95d0283 100644
--- a/fs/exofs/namei.c
+++ b/fs/exofs/namei.c
@@ -153,7 +153,7 @@ static int exofs_link(struct dentry *old_dentry, struct inode *dir,
inode->i_ctime = CURRENT_TIME;
inode_inc_link_count(inode);
- atomic_inc(&inode->i_count);
+ ihold(inode);
return exofs_add_nondir(dentry, inode);
}
diff --git a/fs/ext2/namei.c b/fs/ext2/namei.c
index 71efb0e9a3f..f8aecd2e329 100644
--- a/fs/ext2/namei.c
+++ b/fs/ext2/namei.c
@@ -206,7 +206,7 @@ static int ext2_link (struct dentry * old_dentry, struct inode * dir,
inode->i_ctime = CURRENT_TIME_SEC;
inode_inc_link_count(inode);
- atomic_inc(&inode->i_count);
+ ihold(inode);
err = ext2_add_link(dentry, inode);
if (!err) {
diff --git a/fs/ext3/namei.c b/fs/ext3/namei.c
index 2b35ddb70d6..bce9dce639b 100644
--- a/fs/ext3/namei.c
+++ b/fs/ext3/namei.c
@@ -2260,7 +2260,7 @@ retry:
inode->i_ctime = CURRENT_TIME_SEC;
inc_nlink(inode);
- atomic_inc(&inode->i_count);
+ ihold(inode);
err = ext3_add_entry(handle, dentry, inode);
if (!err) {
diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index 314c0d3b3fa..bd39885b599 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -2312,7 +2312,7 @@ retry:
inode->i_ctime = ext4_current_time(inode);
ext4_inc_count(handle, inode);
- atomic_inc(&inode->i_count);
+ ihold(inode);
err = ext4_add_entry(handle, dentry, inode);
if (!err) {
diff --git a/fs/gfs2/ops_inode.c b/fs/gfs2/ops_inode.c
index 48a274f1674..12cbea7502c 100644
--- a/fs/gfs2/ops_inode.c
+++ b/fs/gfs2/ops_inode.c
@@ -255,7 +255,7 @@ out_parent:
gfs2_holder_uninit(ghs);
gfs2_holder_uninit(ghs + 1);
if (!error) {
- atomic_inc(&inode->i_count);
+ ihold(inode);
d_instantiate(dentry, inode);
mark_inode_dirty(inode);
}
diff --git a/fs/hfsplus/dir.c b/fs/hfsplus/dir.c
index d236d85ec9d..e318bbc0daf 100644
--- a/fs/hfsplus/dir.c
+++ b/fs/hfsplus/dir.c
@@ -286,7 +286,7 @@ static int hfsplus_link(struct dentry *src_dentry, struct inode *dst_dir,
inc_nlink(inode);
hfsplus_instantiate(dst_dentry, inode, cnid);
- atomic_inc(&inode->i_count);
+ ihold(inode);
inode->i_ctime = CURRENT_TIME_SEC;
mark_inode_dirty(inode);
sbi->file_count++;
diff --git a/fs/inode.c b/fs/inode.c
index 430d70f2abe..05ea293d5f3 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -320,6 +320,15 @@ void __iget(struct inode *inode)
atomic_inc(&inode->i_count);
}
+/*
+ * get additional reference to inode; caller must already hold one.
+ */
+void ihold(struct inode *inode)
+{
+ WARN_ON(atomic_inc_return(&inode->i_count) < 2);
+}
+EXPORT_SYMBOL(ihold);
+
static void inode_lru_list_add(struct inode *inode)
{
if (list_empty(&inode->i_list)) {
diff --git a/fs/jffs2/dir.c b/fs/jffs2/dir.c
index ed78a3cf3cb..79121aa5858 100644
--- a/fs/jffs2/dir.c
+++ b/fs/jffs2/dir.c
@@ -289,7 +289,7 @@ static int jffs2_link (struct dentry *old_dentry, struct inode *dir_i, struct de
mutex_unlock(&f->sem);
d_instantiate(dentry, old_dentry->d_inode);
dir_i->i_mtime = dir_i->i_ctime = ITIME(now);
- atomic_inc(&old_dentry->d_inode->i_count);
+ ihold(old_dentry->d_inode);
}
return ret;
}
@@ -864,7 +864,7 @@ static int jffs2_rename (struct inode *old_dir_i, struct dentry *old_dentry,
printk(KERN_NOTICE "jffs2_rename(): Link succeeded, unlink failed (err %d). You now have a hard link\n", ret);
/* Might as well let the VFS know */
d_instantiate(new_dentry, old_dentry->d_inode);
- atomic_inc(&old_dentry->d_inode->i_count);
+ ihold(old_dentry->d_inode);
new_dir_i->i_mtime = new_dir_i->i_ctime = ITIME(now);
return ret;
}
diff --git a/fs/jfs/jfs_txnmgr.c b/fs/jfs/jfs_txnmgr.c
index d945ea76b44..9466957ec84 100644
--- a/fs/jfs/jfs_txnmgr.c
+++ b/fs/jfs/jfs_txnmgr.c
@@ -1279,7 +1279,7 @@ int txCommit(tid_t tid, /* transaction identifier */
* lazy commit thread finishes processing
*/
if (tblk->xflag & COMMIT_DELETE) {
- atomic_inc(&tblk->u.ip->i_count);
+ ihold(tblk->u.ip);
/*
* Avoid a rare deadlock
*
diff --git a/fs/jfs/namei.c b/fs/jfs/namei.c
index a9cf8e8675b..231ca4af9bc 100644
--- a/fs/jfs/namei.c
+++ b/fs/jfs/namei.c
@@ -839,7 +839,7 @@ static int jfs_link(struct dentry *old_dentry,
ip->i_ctime = CURRENT_TIME;
dir->i_ctime = dir->i_mtime = CURRENT_TIME;
mark_inode_dirty(dir);
- atomic_inc(&ip->i_count);
+ ihold(ip);
iplist[0] = ip;
iplist[1] = dir;
diff --git a/fs/libfs.c b/fs/libfs.c
index 2dbf4877d7e..304a5132ca2 100644
--- a/fs/libfs.c
+++ b/fs/libfs.c
@@ -255,7 +255,7 @@ int simple_link(struct dentry *old_dentry, struct inode *dir, struct dentry *den
inode->i_ctime = dir->i_ctime = dir->i_mtime = CURRENT_TIME;
inc_nlink(inode);
- atomic_inc(&inode->i_count);
+ ihold(inode);
dget(dentry);
d_instantiate(dentry, inode);
return 0;
diff --git a/fs/logfs/dir.c b/fs/logfs/dir.c
index 1eb4e89e045..409dfd65e9a 100644
--- a/fs/logfs/dir.c
+++ b/fs/logfs/dir.c
@@ -569,7 +569,7 @@ static int logfs_link(struct dentry *old_dentry, struct inode *dir,
return -EMLINK;
inode->i_ctime = dir->i_ctime = dir->i_mtime = CURRENT_TIME;
- atomic_inc(&inode->i_count);
+ ihold(inode);
inode->i_nlink++;
mark_inode_dirty_sync(inode);
diff --git a/fs/minix/namei.c b/fs/minix/namei.c
index f3f3578393a..c0d35a3acce 100644
--- a/fs/minix/namei.c
+++ b/fs/minix/namei.c
@@ -101,7 +101,7 @@ static int minix_link(struct dentry * old_dentry, struct inode * dir,
inode->i_ctime = CURRENT_TIME_SEC;
inode_inc_link_count(inode);
- atomic_inc(&inode->i_count);
+ ihold(inode);
return add_nondir(dentry, inode);
}
diff --git a/fs/namei.c b/fs/namei.c
index f1ef97dbc6c..f7dbc06857a 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -2285,7 +2285,7 @@ static long do_unlinkat(int dfd, const char __user *pathname)
goto slashes;
inode = dentry->d_inode;
if (inode)
- atomic_inc(&inode->i_count);
+ ihold(inode);
error = mnt_want_write(nd.path.mnt);
if (error)
goto exit2;
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index e257172d438..0fac7fea18e 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -1580,7 +1580,7 @@ nfs_link(struct dentry *old_dentry, struct inode *dir, struct dentry *dentry)
d_drop(dentry);
error = NFS_PROTO(dir)->link(inode, dir, &dentry->d_name);
if (error == 0) {
- atomic_inc(&inode->i_count);
+ ihold(inode);
d_add(dentry, inode);
}
return error;
diff --git a/fs/nfs/getroot.c b/fs/nfs/getroot.c
index a70e446e160..ac7b814ce16 100644
--- a/fs/nfs/getroot.c
+++ b/fs/nfs/getroot.c
@@ -54,8 +54,7 @@ static int nfs_superblock_set_dummy_root(struct super_block *sb, struct inode *i
iput(inode);
return -ENOMEM;
}
- /* Circumvent igrab(): we know the inode is not being freed */
- atomic_inc(&inode->i_count);
+ ihold(inode);
/*
* Ensure that this dentry is invisible to d_find_alias().
* Otherwise, it may be spliced into the tree by
diff --git a/fs/nilfs2/namei.c b/fs/nilfs2/namei.c
index 185d1607cb0..6e9557ecf16 100644
--- a/fs/nilfs2/namei.c
+++ b/fs/nilfs2/namei.c
@@ -207,7 +207,7 @@ static int nilfs_link(struct dentry *old_dentry, struct inode *dir,
inode->i_ctime = CURRENT_TIME;
inode_inc_link_count(inode);
- atomic_inc(&inode->i_count);
+ ihold(inode);
err = nilfs_add_nondir(dentry, inode);
if (!err)
diff --git a/fs/ntfs/super.c b/fs/ntfs/super.c
index d4dec2d3211..d3fbe5730bf 100644
--- a/fs/ntfs/super.c
+++ b/fs/ntfs/super.c
@@ -2911,8 +2911,8 @@ static int ntfs_fill_super(struct super_block *sb, void *opt, const int silent)
goto unl_upcase_iput_tmp_ino_err_out_now;
}
if ((sb->s_root = d_alloc_root(vol->root_ino))) {
- /* We increment i_count simulating an ntfs_iget(). */
- atomic_inc(&vol->root_ino->i_count);
+ /* We grab a reference, simulating an ntfs_iget(). */
+ ihold(vol->root_ino);
ntfs_debug("Exiting, status successful.");
/* Release the default upcase if it has no users. */
mutex_lock(&ntfs_lock);
diff --git a/fs/ocfs2/namei.c b/fs/ocfs2/namei.c
index e7bde21149a..ff5744e1e36 100644
--- a/fs/ocfs2/namei.c
+++ b/fs/ocfs2/namei.c
@@ -742,7 +742,7 @@ static int ocfs2_link(struct dentry *old_dentry,
goto out_commit;
}
- atomic_inc(&inode->i_count);
+ ihold(inode);
dentry->d_op = &ocfs2_dentry_ops;
d_instantiate(dentry, inode);
diff --git a/fs/reiserfs/namei.c b/fs/reiserfs/namei.c
index ee78d4a0086..ba5f51ec345 100644
--- a/fs/reiserfs/namei.c
+++ b/fs/reiserfs/namei.c
@@ -1156,7 +1156,7 @@ static int reiserfs_link(struct dentry *old_dentry, struct inode *dir,
inode->i_ctime = CURRENT_TIME_SEC;
reiserfs_update_sd(&th, inode);
- atomic_inc(&inode->i_count);
+ ihold(inode);
d_instantiate(dentry, inode);
retval = journal_end(&th, dir->i_sb, jbegin_count);
reiserfs_write_unlock(dir->i_sb);
diff --git a/fs/sysv/namei.c b/fs/sysv/namei.c
index 33e047b59b8..11e7f7d11cd 100644
--- a/fs/sysv/namei.c
+++ b/fs/sysv/namei.c
@@ -126,7 +126,7 @@ static int sysv_link(struct dentry * old_dentry, struct inode * dir,
inode->i_ctime = CURRENT_TIME_SEC;
inode_inc_link_count(inode);
- atomic_inc(&inode->i_count);
+ ihold(inode);
return add_nondir(dentry, inode);
}
diff --git a/fs/ubifs/dir.c b/fs/ubifs/dir.c
index 87ebcce7221..14f64b689d7 100644
--- a/fs/ubifs/dir.c
+++ b/fs/ubifs/dir.c
@@ -550,7 +550,7 @@ static int ubifs_link(struct dentry *old_dentry, struct inode *dir,
lock_2_inodes(dir, inode);
inc_nlink(inode);
- atomic_inc(&inode->i_count);
+ ihold(inode);
inode->i_ctime = ubifs_current_time(inode);
dir->i_size += sz_change;
dir_ui->ui_size = dir->i_size;
diff --git a/fs/udf/namei.c b/fs/udf/namei.c
index bf5fc674193..6d8dc02baeb 100644
--- a/fs/udf/namei.c
+++ b/fs/udf/namei.c
@@ -1101,7 +1101,7 @@ static int udf_link(struct dentry *old_dentry, struct inode *dir,
inc_nlink(inode);
inode->i_ctime = current_fs_time(inode->i_sb);
mark_inode_dirty(inode);
- atomic_inc(&inode->i_count);
+ ihold(inode);
d_instantiate(dentry, inode);
unlock_kernel();
diff --git a/fs/ufs/namei.c b/fs/ufs/namei.c
index b056f02b1fb..12f39b9e443 100644
--- a/fs/ufs/namei.c
+++ b/fs/ufs/namei.c
@@ -180,7 +180,7 @@ static int ufs_link (struct dentry * old_dentry, struct inode * dir,
inode->i_ctime = CURRENT_TIME_SEC;
inode_inc_link_count(inode);
- atomic_inc(&inode->i_count);
+ ihold(inode);
error = ufs_add_nondir(dentry, inode);
unlock_kernel();
diff --git a/fs/xfs/linux-2.6/xfs_iops.c b/fs/xfs/linux-2.6/xfs_iops.c
index 71d83c93621..96107efc0c6 100644
--- a/fs/xfs/linux-2.6/xfs_iops.c
+++ b/fs/xfs/linux-2.6/xfs_iops.c
@@ -317,7 +317,7 @@ xfs_vn_link(
if (unlikely(error))
return -error;
- atomic_inc(&inode->i_count);
+ ihold(inode);
d_instantiate(dentry, inode);
return 0;
}
diff --git a/fs/xfs/xfs_inode.h b/fs/xfs/xfs_inode.h
index fac52290de9..fb2ca2e4cdc 100644
--- a/fs/xfs/xfs_inode.h
+++ b/fs/xfs/xfs_inode.h
@@ -500,7 +500,7 @@ void xfs_mark_inode_dirty_sync(xfs_inode_t *);
#define IHOLD(ip) \
do { \
ASSERT(atomic_read(&VFS_I(ip)->i_count) > 0) ; \
- atomic_inc(&(VFS_I(ip)->i_count)); \
+ ihold(VFS_I(ip)); \
trace_xfs_ihold(ip, _THIS_IP_); \
} while (0)