ASSERT(atomic_read(&ip->i_pincount) == 0);
ASSERT(!spin_is_locked(&ip->i_flags_lock));
- ASSERT(completion_done(&ip->i_flush));
+ ASSERT(!xfs_isiflocked(ip));
ASSERT(ip->i_ino == 0);
mrlock_init(&ip->i_iolock, MRLOCK_BARRIER, "xfsio", ip->i_ino);
/* asserts to verify all state is correct here */
ASSERT(atomic_read(&ip->i_pincount) == 0);
ASSERT(!spin_is_locked(&ip->i_flags_lock));
- ASSERT(completion_done(&ip->i_flush));
+ ASSERT(!xfs_isiflocked(ip));
/*
* Because we use RCU freeing we need to ensure the inode always
return 0;
}
#endif
+
+void
+__xfs_iflock(
+ struct xfs_inode *ip)
+{
+ wait_queue_head_t *wq = bit_waitqueue(&ip->i_flags, __XFS_IFLOCK_BIT);
+ DEFINE_WAIT_BIT(wait, &ip->i_flags, __XFS_IFLOCK_BIT);
+
+ do {
+ prepare_to_wait_exclusive(wq, &wait.wait, TASK_UNINTERRUPTIBLE);
+ if (xfs_isiflocked(ip))
+ io_schedule();
+ } while (!xfs_iflock_nowait(ip));
+
+ finish_wait(wq, &wait.wait);
+}
XFS_STATS_INC(xs_iflush_count);
ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_ILOCK_SHARED));
- ASSERT(!completion_done(&ip->i_flush));
+ ASSERT(xfs_isiflocked(ip));
ASSERT(ip->i_d.di_format != XFS_DINODE_FMT_BTREE ||
ip->i_d.di_nextents > XFS_IFORK_MAXEXT(ip, XFS_DATA_FORK));
#endif
ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_ILOCK_SHARED));
- ASSERT(!completion_done(&ip->i_flush));
+ ASSERT(xfs_isiflocked(ip));
ASSERT(ip->i_d.di_format != XFS_DINODE_FMT_BTREE ||
ip->i_d.di_nextents > XFS_IFORK_MAXEXT(ip, XFS_DATA_FORK));
struct xfs_inode_log_item *i_itemp; /* logging information */
mrlock_t i_lock; /* inode lock */
mrlock_t i_iolock; /* inode IO lock */
- struct completion i_flush; /* inode flush completion q */
atomic_t i_pincount; /* inode pin count */
wait_queue_head_t i_ipin_wait; /* inode pinning wait queue */
spinlock_t i_flags_lock; /* inode i_flags lock */
return ret;
}
+static inline int
+xfs_iflags_test_and_set(xfs_inode_t *ip, unsigned short flags)
+{
+ int ret;
+
+ spin_lock(&ip->i_flags_lock);
+ ret = ip->i_flags & flags;
+ if (!ret)
+ ip->i_flags |= flags;
+ spin_unlock(&ip->i_flags_lock);
+ return ret;
+}
+
/*
* Project quota id helpers (previously projid was 16bit only
* and using two 16bit values to hold new 32bit projid was chosen
ip->i_d.di_projid_lo = (__uint16_t) (projid & 0xffff);
}
-/*
- * Manage the i_flush queue embedded in the inode. This completion
- * queue synchronizes processes attempting to flush the in-core
- * inode back to disk.
- */
-static inline void xfs_iflock(xfs_inode_t *ip)
-{
- wait_for_completion(&ip->i_flush);
-}
-
-static inline int xfs_iflock_nowait(xfs_inode_t *ip)
-{
- return try_wait_for_completion(&ip->i_flush);
-}
-
-static inline void xfs_ifunlock(xfs_inode_t *ip)
-{
- complete(&ip->i_flush);
-}
-
/*
* In-core inode flags.
*/
-#define XFS_IRECLAIM 0x0001 /* started reclaiming this inode */
-#define XFS_ISTALE 0x0002 /* inode has been staled */
-#define XFS_IRECLAIMABLE 0x0004 /* inode can be reclaimed */
-#define XFS_INEW 0x0008 /* inode has just been allocated */
-#define XFS_IFILESTREAM 0x0010 /* inode is in a filestream directory */
-#define XFS_ITRUNCATED 0x0020 /* truncated down so flush-on-close */
-#define XFS_IDIRTY_RELEASE 0x0040 /* dirty release already seen */
+#define XFS_IRECLAIM (1 << 0) /* started reclaiming this inode */
+#define XFS_ISTALE (1 << 1) /* inode has been staled */
+#define XFS_IRECLAIMABLE (1 << 2) /* inode can be reclaimed */
+#define XFS_INEW (1 << 3) /* inode has just been allocated */
+#define XFS_IFILESTREAM (1 << 4) /* inode is in a filestream dir. */
+#define XFS_ITRUNCATED (1 << 5) /* truncated down so flush-on-close */
+#define XFS_IDIRTY_RELEASE (1 << 6) /* dirty release already seen */
+#define __XFS_IFLOCK_BIT 7 /* inode is being flushed right now */
+#define XFS_IFLOCK (1 << __XFS_IFLOCK_BIT)
/*
* Per-lifetime flags need to be reset when re-using a reclaimable inode during
XFS_IDIRTY_RELEASE | XFS_ITRUNCATED | \
XFS_IFILESTREAM);
+/*
+ * Synchronize processes attempting to flush the in-core inode back to disk.
+ */
+
+extern void __xfs_iflock(struct xfs_inode *ip);
+
+static inline int xfs_iflock_nowait(struct xfs_inode *ip)
+{
+ return !xfs_iflags_test_and_set(ip, XFS_IFLOCK);
+}
+
+static inline void xfs_iflock(struct xfs_inode *ip)
+{
+ if (!xfs_iflock_nowait(ip))
+ __xfs_iflock(ip);
+}
+
+static inline void xfs_ifunlock(struct xfs_inode *ip)
+{
+ xfs_iflags_clear(ip, XFS_IFLOCK);
+ wake_up_bit(&ip->i_flags, __XFS_IFLOCK_BIT);
+}
+
+static inline int xfs_isiflocked(struct xfs_inode *ip)
+{
+ return xfs_iflags_test(ip, XFS_IFLOCK);
+}
+
/*
* Flags for inode locking.
* Bit ranges: 1<<1 - 1<<16-1 -- iolock/ilock modes (bitfield)
* If a flush is not in progress anymore, chances are that the
* inode was taken off the AIL. So, just get out.
*/
- if (completion_done(&ip->i_flush) ||
+ if (!xfs_isiflocked(ip) ||
!(lip->li_flags & XFS_LI_IN_AIL)) {
xfs_iunlock(ip, XFS_ILOCK_SHARED);
return true;
struct xfs_inode *ip = iip->ili_inode;
ASSERT(xfs_isilocked(ip, XFS_ILOCK_SHARED));
- ASSERT(!completion_done(&ip->i_flush));
+ ASSERT(xfs_isiflocked(ip));
/*
* Since we were able to lock the inode's flush lock and
atomic_set(&ip->i_pincount, 0);
spin_lock_init(&ip->i_flags_lock);
init_waitqueue_head(&ip->i_ipin_wait);
- /*
- * Because we want to use a counting completion, complete
- * the flush completion once to allow a single access to
- * the flush completion without blocking.
- */
- init_completion(&ip->i_flush);
- complete(&ip->i_flush);
mrlock_init(&ip->i_lock, MRLOCK_ALLOW_EQUAL_PRI|MRLOCK_BARRIER,
"xfsino", ip->i_ino);
return 1;
/*
- * do some unlocked checks first to avoid unnecessary lock traffic.
- * The first is a flush lock check, the second is a already in reclaim
- * check. Only do these checks if we are not going to block on locks.
+ * If we are asked for non-blocking operation, do unlocked checks to
+ * see if the inode already is being flushed or in reclaim to avoid
+ * lock traffic.
*/
if ((flags & SYNC_TRYLOCK) &&
- (!ip->i_flush.done || __xfs_iflags_test(ip, XFS_IRECLAIM))) {
+ __xfs_iflags_test(ip, XFS_IFLOCK | XFS_IRECLAIM))
return 1;
- }
/*
* The radix tree lock here protects a thread in xfs_iget from racing
projects / linux.git / commitdiff