xfs: unlock i_mutex in xfs_break_layouts
We want to drop all I/O path locks when recalling layouts, and that includes
i_mutex for the write path. Without this we get stuck processe when recalls
take too long.
[dchinner: fix build with !CONFIG_PNFS]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c
index edeaccc..f63aedd 100644
--- a/fs/xfs/xfs_file.c
+++ b/fs/xfs/xfs_file.c
@@ -555,7 +555,7 @@
if (error)
return error;
- error = xfs_break_layouts(inode, iolock);
+ error = xfs_break_layouts(inode, iolock, true);
if (error)
return error;
@@ -842,7 +842,7 @@
return -EOPNOTSUPP;
xfs_ilock(ip, iolock);
- error = xfs_break_layouts(inode, &iolock);
+ error = xfs_break_layouts(inode, &iolock, false);
if (error)
goto out_unlock;
diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c
index ac4feae..3a21cc7 100644
--- a/fs/xfs/xfs_ioctl.c
+++ b/fs/xfs/xfs_ioctl.c
@@ -639,7 +639,7 @@
return error;
xfs_ilock(ip, iolock);
- error = xfs_break_layouts(inode, &iolock);
+ error = xfs_break_layouts(inode, &iolock, false);
if (error)
goto out_unlock;
diff --git a/fs/xfs/xfs_iops.c b/fs/xfs/xfs_iops.c
index d7782ae..1d4efee 100644
--- a/fs/xfs/xfs_iops.c
+++ b/fs/xfs/xfs_iops.c
@@ -988,7 +988,7 @@
uint iolock = XFS_IOLOCK_EXCL;
xfs_ilock(ip, iolock);
- error = xfs_break_layouts(dentry->d_inode, &iolock);
+ error = xfs_break_layouts(dentry->d_inode, &iolock, true);
if (!error)
error = xfs_setattr_size(ip, iattr);
xfs_iunlock(ip, iolock);
diff --git a/fs/xfs/xfs_pnfs.c b/fs/xfs/xfs_pnfs.c
index 4b33ef1..cbb424f 100644
--- a/fs/xfs/xfs_pnfs.c
+++ b/fs/xfs/xfs_pnfs.c
@@ -31,7 +31,8 @@
int
xfs_break_layouts(
struct inode *inode,
- uint *iolock)
+ uint *iolock,
+ bool with_imutex)
{
struct xfs_inode *ip = XFS_I(inode);
int error;
@@ -40,8 +41,12 @@
while ((error = break_layout(inode, false) == -EWOULDBLOCK)) {
xfs_iunlock(ip, *iolock);
+ if (with_imutex && (*iolock & XFS_IOLOCK_EXCL))
+ mutex_unlock(&inode->i_mutex);
error = break_layout(inode, true);
*iolock = XFS_IOLOCK_EXCL;
+ if (with_imutex)
+ mutex_lock(&inode->i_mutex);
xfs_ilock(ip, *iolock);
}
diff --git a/fs/xfs/xfs_pnfs.h b/fs/xfs/xfs_pnfs.h
index b7fbfce..8147ac1 100644
--- a/fs/xfs/xfs_pnfs.h
+++ b/fs/xfs/xfs_pnfs.h
@@ -8,9 +8,10 @@
int xfs_fs_commit_blocks(struct inode *inode, struct iomap *maps, int nr_maps,
struct iattr *iattr);
-int xfs_break_layouts(struct inode *inode, uint *iolock);
+int xfs_break_layouts(struct inode *inode, uint *iolock, bool with_imutex);
#else
-static inline int xfs_break_layouts(struct inode *inode, uint *iolock)
+static inline int
+xfs_break_layouts(struct inode *inode, uint *iolock, bool with_imutex)
{
return 0;
}
