[XFS] Shutdown the filesystem if all device paths have gone. Made

shutdown vop flags consistent with sync vop flags declarations too.

SGI-PV: 939911
SGI-Modid: xfs-linux-melb:xfs-kern:26096a

Signed-off-by: Nathan Scott <nathans@sgi.com>

5 files changed, 33 insertions, 9 deletions

diff --git a/fs/xfs/linux-2.6/xfs_aops.c b/fs/xfs/linux-2.6/xfs_aops.c
index 4d191ef39b67..1fcdc0abda6e 100644
--- a/fs/xfs/linux-2.6/xfs_aops.c
+++ b/fs/xfs/linux-2.6/xfs_aops.c
@@ -136,9 +136,10 @@ xfs_destroy_ioend(
 
         for (bh = ioend->io_buffer_head; bh; bh = next) {
                 next = bh->b_private;
-                bh->b_end_io(bh, ioend->io_uptodate);
+                bh->b_end_io(bh, !ioend->io_error);
         }
-
+        if (unlikely(ioend->io_error))
+                vn_ioerror(ioend->io_vnode, ioend->io_error, __FILE__,__LINE__);
         vn_iowake(ioend->io_vnode);
         mempool_free(ioend, xfs_ioend_pool);
 }
@@ -185,7 +186,7 @@ xfs_end_bio_unwritten(
         size_t                  size = ioend->io_size;
         int                     error;
 
-        if (ioend->io_uptodate)
+        if (likely(!ioend->io_error))
                 VOP_BMAP(vp, offset, size, BMAPI_UNWRITTEN, NULL, NULL, error);
         xfs_destroy_ioend(ioend);
 }
@@ -211,7 +212,7 @@ xfs_alloc_ioend(
          * all the I/O from calling the completion routine too early.
          */
         atomic_set(&ioend->io_remaining, 1);
-        ioend->io_uptodate = 1; /* cleared if any I/O fails */
+        ioend->io_error = 0;
         ioend->io_list = NULL;
         ioend->io_type = type;
         ioend->io_vnode = vn_from_inode(inode);
@@ -271,16 +272,14 @@ xfs_end_bio(
         if (bio->bi_size)
                 return 1;
 
-        ASSERT(ioend);
         ASSERT(atomic_read(&bio->bi_cnt) >= 1);
+        ioend->io_error = test_bit(BIO_UPTODATE, &bio->bi_flags) ? 0 : error;
 
         /* Toss bio and pass work off to an xfsdatad thread */
-        if (!test_bit(BIO_UPTODATE, &bio->bi_flags))
-                ioend->io_uptodate = 0;
         bio->bi_private = NULL;
         bio->bi_end_io = NULL;
-
         bio_put(bio);
+
         xfs_finish_ioend(ioend);
         return 0;
 }
diff --git a/fs/xfs/linux-2.6/xfs_aops.h b/fs/xfs/linux-2.6/xfs_aops.h
index 60716543c68b..41c7d2da638a 100644
--- a/fs/xfs/linux-2.6/xfs_aops.h
+++ b/fs/xfs/linux-2.6/xfs_aops.h
@@ -30,7 +30,7 @@ typedef void (*xfs_ioend_func_t)(void *);
 typedef struct xfs_ioend {
         struct xfs_ioend        *io_list;       /* next ioend in chain */
         unsigned int            io_type;        /* delalloc / unwritten */
-        unsigned int            io_uptodate;    /* I/O status register */
+        int                     io_error;       /* I/O error code */
         atomic_t                io_remaining;   /* hold count */
         struct vnode            *io_vnode;      /* file being written to */
         struct buffer_head      *io_buffer_head;/* buffer linked list head */
diff --git a/fs/xfs/linux-2.6/xfs_vfs.h b/fs/xfs/linux-2.6/xfs_vfs.h
index 841200c03092..2ca05043a0fd 100644
--- a/fs/xfs/linux-2.6/xfs_vfs.h
+++ b/fs/xfs/linux-2.6/xfs_vfs.h
@@ -94,6 +94,13 @@ typedef enum {
 #define SYNC_REMOUNT            0x0080  /* remount readonly, no dummy LRs */
 #define SYNC_QUIESCE            0x0100  /* quiesce filesystem for a snapshot */
 
+#define SHUTDOWN_META_IO_ERROR  0x0001  /* write attempt to metadata failed */
+#define SHUTDOWN_LOG_IO_ERROR   0x0002  /* write attempt to the log failed */
+#define SHUTDOWN_FORCE_UMOUNT   0x0004  /* shutdown from a forced unmount */
+#define SHUTDOWN_CORRUPT_INCORE 0x0008  /* corrupt in-memory data structures */
+#define SHUTDOWN_REMOTE_REQ     0x0010  /* shutdown came from remote cell */
+#define SHUTDOWN_DEVICE_REQ     0x0020  /* failed all paths to the device */
+
 typedef int     (*vfs_mount_t)(bhv_desc_t *,
                                 struct xfs_mount_args *, struct cred *);
 typedef int     (*vfs_parseargs_t)(bhv_desc_t *, char *,
diff --git a/fs/xfs/linux-2.6/xfs_vnode.c b/fs/xfs/linux-2.6/xfs_vnode.c
index d27c25b27ccd..f17e39cff230 100644
--- a/fs/xfs/linux-2.6/xfs_vnode.c
+++ b/fs/xfs/linux-2.6/xfs_vnode.c
@@ -54,6 +54,22 @@ vn_iowake(
                 wake_up(vptosync(vp));
 }
 
+/*
+ * Volume managers supporting multiple paths can send back ENODEV when the
+ * final path disappears.  In this case continuing to fill the page cache
+ * with dirty data which cannot be written out is evil, so prevent that.
+ */
+void
+vn_ioerror(
+        struct vnode    *vp,
+        int             error,
+        char            *f,
+        int             l)
+{
+        if (unlikely(error == -ENODEV))
+                VFS_FORCE_SHUTDOWN(vp->v_vfsp, SHUTDOWN_DEVICE_REQ, f, l);
+}
+
 struct vnode *
 vn_initialize(
         struct inode    *inode)
diff --git a/fs/xfs/linux-2.6/xfs_vnode.h b/fs/xfs/linux-2.6/xfs_vnode.h
index 2a8e16c22353..a64b7db67003 100644
--- a/fs/xfs/linux-2.6/xfs_vnode.h
+++ b/fs/xfs/linux-2.6/xfs_vnode.h
@@ -514,6 +514,8 @@ extern void	vn_revalidate_core(struct vnode *, vattr_t *);
 extern void     vn_iowait(struct vnode *vp);
 extern void     vn_iowake(struct vnode *vp);
 
+extern void     vn_ioerror(struct vnode *vp, int error, char *f, int l);
+
 static inline int vn_count(struct vnode *vp)
 {
         return atomic_read(&vn_to_inode(vp)->i_count);