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authorLinus Torvalds <torvalds@linux-foundation.org>2009-02-03 16:50:20 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2009-02-03 16:50:20 -0800
commit3e1c4005134e3a090c64c1bc35f965043bb451f4 (patch)
treeaae42aa4706ac44091eb119776183f2c61f0aed0 /fs
parentb987e8e5a986e77069c99fda5da6878751808fe9 (diff)
parentfd4ef231962ab44fd1004e87f9d7c6809f00cd64 (diff)
downloadlinux-3e1c4005134e3a090c64c1bc35f965043bb451f4.tar.gz
Merge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mfasheh/ocfs2
* 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mfasheh/ocfs2: ocfs2: add quota call to ocfs2_remove_btree_range() ocfs2: Wakeup the downconvert thread after a successful cancel convert ocfs2: Access the xattr bucket only before modifying it. configfs: Silence lockdep on mkdir(), rmdir() and configfs_depend_item() ocfs2: Fix possible deadlock in ocfs2_write_dquot() ocfs2: Push out dropping of dentry lock to ocfs2_wq
Diffstat (limited to 'fs')
-rw-r--r--fs/configfs/dir.c59
-rw-r--r--fs/ocfs2/alloc.c3
-rw-r--r--fs/ocfs2/dcache.c42
-rw-r--r--fs/ocfs2/dcache.h9
-rw-r--r--fs/ocfs2/dlmglue.c4
-rw-r--r--fs/ocfs2/ocfs2.h6
-rw-r--r--fs/ocfs2/quota_global.c4
-rw-r--r--fs/ocfs2/super.c3
-rw-r--r--fs/ocfs2/xattr.c17
9 files changed, 133 insertions, 14 deletions
diff --git a/fs/configfs/dir.c b/fs/configfs/dir.c
index 8e93341f3e8..9c235839114 100644
--- a/fs/configfs/dir.c
+++ b/fs/configfs/dir.c
@@ -553,12 +553,24 @@ static void detach_groups(struct config_group *group)
child = sd->s_dentry;
+ /*
+ * Note: we hide this from lockdep since we have no way
+ * to teach lockdep about recursive
+ * I_MUTEX_PARENT -> I_MUTEX_CHILD patterns along a path
+ * in an inode tree, which are valid as soon as
+ * I_MUTEX_PARENT -> I_MUTEX_CHILD is valid from a
+ * parent inode to one of its children.
+ */
+ lockdep_off();
mutex_lock(&child->d_inode->i_mutex);
+ lockdep_on();
configfs_detach_group(sd->s_element);
child->d_inode->i_flags |= S_DEAD;
+ lockdep_off();
mutex_unlock(&child->d_inode->i_mutex);
+ lockdep_on();
d_delete(child);
dput(child);
@@ -748,11 +760,22 @@ static int configfs_attach_item(struct config_item *parent_item,
* We are going to remove an inode and its dentry but
* the VFS may already have hit and used them. Thus,
* we must lock them as rmdir() would.
+ *
+ * Note: we hide this from lockdep since we have no way
+ * to teach lockdep about recursive
+ * I_MUTEX_PARENT -> I_MUTEX_CHILD patterns along a path
+ * in an inode tree, which are valid as soon as
+ * I_MUTEX_PARENT -> I_MUTEX_CHILD is valid from a
+ * parent inode to one of its children.
*/
+ lockdep_off();
mutex_lock(&dentry->d_inode->i_mutex);
+ lockdep_on();
configfs_remove_dir(item);
dentry->d_inode->i_flags |= S_DEAD;
+ lockdep_off();
mutex_unlock(&dentry->d_inode->i_mutex);
+ lockdep_on();
d_delete(dentry);
}
}
@@ -787,14 +810,25 @@ static int configfs_attach_group(struct config_item *parent_item,
*
* We must also lock the inode to remove it safely in case of
* error, as rmdir() would.
+ *
+ * Note: we hide this from lockdep since we have no way
+ * to teach lockdep about recursive
+ * I_MUTEX_PARENT -> I_MUTEX_CHILD patterns along a path
+ * in an inode tree, which are valid as soon as
+ * I_MUTEX_PARENT -> I_MUTEX_CHILD is valid from a
+ * parent inode to one of its children.
*/
+ lockdep_off();
mutex_lock_nested(&dentry->d_inode->i_mutex, I_MUTEX_CHILD);
+ lockdep_on();
ret = populate_groups(to_config_group(item));
if (ret) {
configfs_detach_item(item);
dentry->d_inode->i_flags |= S_DEAD;
}
+ lockdep_off();
mutex_unlock(&dentry->d_inode->i_mutex);
+ lockdep_on();
if (ret)
d_delete(dentry);
}
@@ -956,7 +990,17 @@ static int configfs_depend_prep(struct dentry *origin,
BUG_ON(!origin || !sd);
/* Lock this guy on the way down */
+ /*
+ * Note: we hide this from lockdep since we have no way
+ * to teach lockdep about recursive
+ * I_MUTEX_PARENT -> I_MUTEX_CHILD patterns along a path
+ * in an inode tree, which are valid as soon as
+ * I_MUTEX_PARENT -> I_MUTEX_CHILD is valid from a
+ * parent inode to one of its children.
+ */
+ lockdep_off();
mutex_lock(&sd->s_dentry->d_inode->i_mutex);
+ lockdep_on();
if (sd->s_element == target) /* Boo-yah */
goto out;
@@ -970,7 +1014,9 @@ static int configfs_depend_prep(struct dentry *origin,
}
/* We looped all our children and didn't find target */
+ lockdep_off();
mutex_unlock(&sd->s_dentry->d_inode->i_mutex);
+ lockdep_on();
ret = -ENOENT;
out:
@@ -990,11 +1036,16 @@ static void configfs_depend_rollback(struct dentry *origin,
struct dentry *dentry = item->ci_dentry;
while (dentry != origin) {
+ /* See comments in configfs_depend_prep() */
+ lockdep_off();
mutex_unlock(&dentry->d_inode->i_mutex);
+ lockdep_on();
dentry = dentry->d_parent;
}
+ lockdep_off();
mutex_unlock(&origin->d_inode->i_mutex);
+ lockdep_on();
}
int configfs_depend_item(struct configfs_subsystem *subsys,
@@ -1329,8 +1380,16 @@ static int configfs_rmdir(struct inode *dir, struct dentry *dentry)
}
/* Wait until the racing operation terminates */
+ /*
+ * Note: we hide this from lockdep since we are locked
+ * with subclass I_MUTEX_NORMAL from vfs_rmdir() (why
+ * not I_MUTEX_CHILD?), and I_MUTEX_XATTR or
+ * I_MUTEX_QUOTA are not relevant for the locked inode.
+ */
+ lockdep_off();
mutex_lock(wait_mutex);
mutex_unlock(wait_mutex);
+ lockdep_on();
}
} while (ret == -EAGAIN);
diff --git a/fs/ocfs2/alloc.c b/fs/ocfs2/alloc.c
index d861096c9d8..60fe74035db 100644
--- a/fs/ocfs2/alloc.c
+++ b/fs/ocfs2/alloc.c
@@ -5390,6 +5390,9 @@ int ocfs2_remove_btree_range(struct inode *inode,
goto out;
}
+ vfs_dq_free_space_nodirty(inode,
+ ocfs2_clusters_to_bytes(inode->i_sb, len));
+
ret = ocfs2_remove_extent(inode, et, cpos, len, handle, meta_ac,
dealloc);
if (ret) {
diff --git a/fs/ocfs2/dcache.c b/fs/ocfs2/dcache.c
index b1cc7c381e8..e9d7c2038c0 100644
--- a/fs/ocfs2/dcache.c
+++ b/fs/ocfs2/dcache.c
@@ -38,6 +38,7 @@
#include "dlmglue.h"
#include "file.h"
#include "inode.h"
+#include "super.h"
static int ocfs2_dentry_revalidate(struct dentry *dentry,
@@ -294,6 +295,34 @@ out_attach:
return ret;
}
+static DEFINE_SPINLOCK(dentry_list_lock);
+
+/* We limit the number of dentry locks to drop in one go. We have
+ * this limit so that we don't starve other users of ocfs2_wq. */
+#define DL_INODE_DROP_COUNT 64
+
+/* Drop inode references from dentry locks */
+void ocfs2_drop_dl_inodes(struct work_struct *work)
+{
+ struct ocfs2_super *osb = container_of(work, struct ocfs2_super,
+ dentry_lock_work);
+ struct ocfs2_dentry_lock *dl;
+ int drop_count = DL_INODE_DROP_COUNT;
+
+ spin_lock(&dentry_list_lock);
+ while (osb->dentry_lock_list && drop_count--) {
+ dl = osb->dentry_lock_list;
+ osb->dentry_lock_list = dl->dl_next;
+ spin_unlock(&dentry_list_lock);
+ iput(dl->dl_inode);
+ kfree(dl);
+ spin_lock(&dentry_list_lock);
+ }
+ if (osb->dentry_lock_list)
+ queue_work(ocfs2_wq, &osb->dentry_lock_work);
+ spin_unlock(&dentry_list_lock);
+}
+
/*
* ocfs2_dentry_iput() and friends.
*
@@ -318,16 +347,23 @@ out_attach:
static void ocfs2_drop_dentry_lock(struct ocfs2_super *osb,
struct ocfs2_dentry_lock *dl)
{
- iput(dl->dl_inode);
ocfs2_simple_drop_lockres(osb, &dl->dl_lockres);
ocfs2_lock_res_free(&dl->dl_lockres);
- kfree(dl);
+
+ /* We leave dropping of inode reference to ocfs2_wq as that can
+ * possibly lead to inode deletion which gets tricky */
+ spin_lock(&dentry_list_lock);
+ if (!osb->dentry_lock_list)
+ queue_work(ocfs2_wq, &osb->dentry_lock_work);
+ dl->dl_next = osb->dentry_lock_list;
+ osb->dentry_lock_list = dl;
+ spin_unlock(&dentry_list_lock);
}
void ocfs2_dentry_lock_put(struct ocfs2_super *osb,
struct ocfs2_dentry_lock *dl)
{
- int unlock = 0;
+ int unlock;
BUG_ON(dl->dl_count == 0);
diff --git a/fs/ocfs2/dcache.h b/fs/ocfs2/dcache.h
index c091c34d988..d06e16c0664 100644
--- a/fs/ocfs2/dcache.h
+++ b/fs/ocfs2/dcache.h
@@ -29,8 +29,13 @@
extern struct dentry_operations ocfs2_dentry_ops;
struct ocfs2_dentry_lock {
+ /* Use count of dentry lock */
unsigned int dl_count;
- u64 dl_parent_blkno;
+ union {
+ /* Linked list of dentry locks to release */
+ struct ocfs2_dentry_lock *dl_next;
+ u64 dl_parent_blkno;
+ };
/*
* The ocfs2_dentry_lock keeps an inode reference until
@@ -47,6 +52,8 @@ int ocfs2_dentry_attach_lock(struct dentry *dentry, struct inode *inode,
void ocfs2_dentry_lock_put(struct ocfs2_super *osb,
struct ocfs2_dentry_lock *dl);
+void ocfs2_drop_dl_inodes(struct work_struct *work);
+
struct dentry *ocfs2_find_local_alias(struct inode *inode, u64 parent_blkno,
int skip_unhashed);
diff --git a/fs/ocfs2/dlmglue.c b/fs/ocfs2/dlmglue.c
index b0c4cadd4c4..206a2370876 100644
--- a/fs/ocfs2/dlmglue.c
+++ b/fs/ocfs2/dlmglue.c
@@ -2860,6 +2860,10 @@ static void ocfs2_unlock_ast(void *opaque, int error)
case OCFS2_UNLOCK_CANCEL_CONVERT:
mlog(0, "Cancel convert success for %s\n", lockres->l_name);
lockres->l_action = OCFS2_AST_INVALID;
+ /* Downconvert thread may have requeued this lock, we
+ * need to wake it. */
+ if (lockres->l_flags & OCFS2_LOCK_BLOCKED)
+ ocfs2_wake_downconvert_thread(ocfs2_get_lockres_osb(lockres));
break;
case OCFS2_UNLOCK_DROP_LOCK:
lockres->l_level = DLM_LOCK_IV;
diff --git a/fs/ocfs2/ocfs2.h b/fs/ocfs2/ocfs2.h
index ad5c24a29ed..077384135f4 100644
--- a/fs/ocfs2/ocfs2.h
+++ b/fs/ocfs2/ocfs2.h
@@ -210,6 +210,7 @@ struct ocfs2_journal;
struct ocfs2_slot_info;
struct ocfs2_recovery_map;
struct ocfs2_quota_recovery;
+struct ocfs2_dentry_lock;
struct ocfs2_super
{
struct task_struct *commit_task;
@@ -325,6 +326,11 @@ struct ocfs2_super
struct list_head blocked_lock_list;
unsigned long blocked_lock_count;
+ /* List of dentry locks to release. Anyone can add locks to
+ * the list, ocfs2_wq processes the list */
+ struct ocfs2_dentry_lock *dentry_lock_list;
+ struct work_struct dentry_lock_work;
+
wait_queue_head_t osb_mount_event;
/* Truncate log info */
diff --git a/fs/ocfs2/quota_global.c b/fs/ocfs2/quota_global.c
index f4efa89baee..1ed0f7c8686 100644
--- a/fs/ocfs2/quota_global.c
+++ b/fs/ocfs2/quota_global.c
@@ -754,7 +754,9 @@ static int ocfs2_mark_dquot_dirty(struct dquot *dquot)
if (dquot->dq_flags & mask)
sync = 1;
spin_unlock(&dq_data_lock);
- if (!sync) {
+ /* This is a slight hack but we can't afford getting global quota
+ * lock if we already have a transaction started. */
+ if (!sync || journal_current_handle()) {
status = ocfs2_write_dquot(dquot);
goto out;
}
diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c
index 43ed11345b5..b1cb38fbe80 100644
--- a/fs/ocfs2/super.c
+++ b/fs/ocfs2/super.c
@@ -1887,6 +1887,9 @@ static int ocfs2_initialize_super(struct super_block *sb,
INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery);
journal->j_state = OCFS2_JOURNAL_FREE;
+ INIT_WORK(&osb->dentry_lock_work, ocfs2_drop_dl_inodes);
+ osb->dentry_lock_list = NULL;
+
/* get some pseudo constants for clustersize bits */
osb->s_clustersize_bits =
le32_to_cpu(di->id2.i_super.s_clustersize_bits);
diff --git a/fs/ocfs2/xattr.c b/fs/ocfs2/xattr.c
index e1d638af6ac..915039fffe6 100644
--- a/fs/ocfs2/xattr.c
+++ b/fs/ocfs2/xattr.c
@@ -4729,13 +4729,6 @@ static int ocfs2_xattr_bucket_value_truncate(struct inode *inode,
vb.vb_xv = (struct ocfs2_xattr_value_root *)
(vb.vb_bh->b_data + offset % blocksize);
- ret = ocfs2_xattr_bucket_journal_access(ctxt->handle, bucket,
- OCFS2_JOURNAL_ACCESS_WRITE);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
-
/*
* From here on out we have to dirty the bucket. The generic
* value calls only modify one of the bucket's bhs, but we need
@@ -4748,12 +4741,18 @@ static int ocfs2_xattr_bucket_value_truncate(struct inode *inode,
ret = ocfs2_xattr_value_truncate(inode, &vb, len, ctxt);
if (ret) {
mlog_errno(ret);
- goto out_dirty;
+ goto out;
+ }
+
+ ret = ocfs2_xattr_bucket_journal_access(ctxt->handle, bucket,
+ OCFS2_JOURNAL_ACCESS_WRITE);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
}
xe->xe_value_size = cpu_to_le64(len);
-out_dirty:
ocfs2_xattr_bucket_journal_dirty(ctxt->handle, bucket);
out: