Merge branch '3.4-urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending

Pull two more target-core updates from Nicholas Bellinger:
 "The first patch addresses a SPC-2 reservations RELEASE bug in a
  special (iscsi specific) multi-ISID setup case that was allowing the
  same initiator to be able to incorrect release it's own reservation on
  a different SCSI path with enforce_pr_isid=1 operation.  This bug was
  caught by Bernhard Kohl.

  The second patch is to address a bug with FILEIO backends where the
  incorrect number of blocks for READ_CAPACITY was being reported after
  an underlying device-mapper block_device size change.  This patch uses
  now i_size_read() in fd_get_blocks() for FILEIO backends with an
  underlying block_device, instead of trying to determine this value at
  setup time during fd_create_virtdevice().  (hch CC'ed)

  Both are CC'ed to stable."

* '3.4-urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending:
  target: Fix bug in handling of FILEIO + block_device resize ops
  target: Fix SPC-2 RELEASE bug for multi-session iSCSI client setups

2 files changed, 19 insertions, 6 deletions

diff --git a/drivers/target/target_core_file.c b/drivers/target/target_core_file.c
index 7ed58e2df791..f286955331a2 100644
--- a/drivers/target/target_core_file.c
+++ b/drivers/target/target_core_file.c
@@ -169,6 +169,7 @@ static struct se_device *fd_create_virtdevice(
         inode = file->f_mapping->host;
         if (S_ISBLK(inode->i_mode)) {
                 struct request_queue *q;
+                unsigned long long dev_size;
                 /*
                  * Setup the local scope queue_limits from struct request_queue->limits
                  * to pass into transport_add_device_to_core_hba() as struct se_dev_limits.
@@ -183,13 +184,12 @@ static struct se_device *fd_create_virtdevice(
                  * one (1) logical sector from underlying struct block_device
                  */
                 fd_dev->fd_block_size = bdev_logical_block_size(inode->i_bdev);
-                fd_dev->fd_dev_size = (i_size_read(file->f_mapping->host) -
+                dev_size = (i_size_read(file->f_mapping->host) -
                                        fd_dev->fd_block_size);
 
                 pr_debug("FILEIO: Using size: %llu bytes from struct"
                         " block_device blocks: %llu logical_block_size: %d\n",
-                        fd_dev->fd_dev_size,
-                        div_u64(fd_dev->fd_dev_size, fd_dev->fd_block_size),
+                        dev_size, div_u64(dev_size, fd_dev->fd_block_size),
                         fd_dev->fd_block_size);
         } else {
                 if (!(fd_dev->fbd_flags & FBDF_HAS_SIZE)) {
@@ -605,10 +605,20 @@ static u32 fd_get_device_type(struct se_device *dev)
 static sector_t fd_get_blocks(struct se_device *dev)
 {
         struct fd_dev *fd_dev = dev->dev_ptr;
-        unsigned long long blocks_long = div_u64(fd_dev->fd_dev_size,
-                        dev->se_sub_dev->se_dev_attrib.block_size);
+        struct file *f = fd_dev->fd_file;
+        struct inode *i = f->f_mapping->host;
+        unsigned long long dev_size;
+        /*
+         * When using a file that references an underlying struct block_device,
+         * ensure dev_size is always based on the current inode size in order
+         * to handle underlying block_device resize operations.
+         */
+        if (S_ISBLK(i->i_mode))
+                dev_size = (i_size_read(i) - fd_dev->fd_block_size);
+        else
+                dev_size = fd_dev->fd_dev_size;
 
-        return blocks_long;
+        return div_u64(dev_size, dev->se_sub_dev->se_dev_attrib.block_size);
 }
 
 static struct se_subsystem_api fileio_template = {
diff --git a/drivers/target/target_core_pr.c b/drivers/target/target_core_pr.c
index 86f0c3b5d500..c3148b10b4b3 100644
--- a/drivers/target/target_core_pr.c
+++ b/drivers/target/target_core_pr.c
@@ -220,6 +220,9 @@ int target_scsi2_reservation_release(struct se_task *task)
         if (dev->dev_reserved_node_acl != sess->se_node_acl)
                 goto out_unlock;
 
+        if (dev->dev_res_bin_isid != sess->sess_bin_isid)
+                goto out_unlock;
+
         dev->dev_reserved_node_acl = NULL;
         dev->dev_flags &= ~DF_SPC2_RESERVATIONS;
         if (dev->dev_flags & DF_SPC2_RESERVATIONS_WITH_ISID) {