From 494baebd78587465d90b9e873cd88c0a83ca52f9 Mon Sep 17 00:00:00 2001

From: Max Reitz <mreitz@redhat.com>

Date: Wed, 3 Apr 2019 17:13:09 +0100

Subject: [PATCH 02/11] file-posix: Include filename in locking error message

RH-Author: Max Reitz <mreitz@redhat.com>

Message-id: <20190403171315.20841-3-mreitz@redhat.com>

Patchwork-id: 85400

O-Subject: [RHEL-8.1 qemu-kvm PATCH 2/8] file-posix: Include filename in locking error message

Bugzilla: 1694148

RH-Acked-by: John Snow <jsnow@redhat.com>

RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>

RH-Acked-by: Stefano Garzarella <sgarzare@redhat.com>

From: Fam Zheng <famz@redhat.com>

Image locking errors happening at device initialization time doesn't say

which file cannot be locked, for instance,

    -device scsi-disk,drive=drive-1: Failed to get shared "write" lock

    Is another process using the image?

could refer to either the overlay image or its backing image.

Hoist the error_append_hint to the caller of raw_check_lock_bytes where

file name is known, and include it in the error hint.

Signed-off-by: Fam Zheng <famz@redhat.com>

Reviewed-by: Eric Blake <eblake@redhat.com>

Signed-off-by: Kevin Wolf <kwolf@redhat.com>

(cherry picked from commit b857431d2abe3945b672b41f33690e9943a8752a)

Signed-off-by: Max Reitz <mreitz@redhat.com>

Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>

---

 block/file-posix.c         | 10 +++---

 tests/qemu-iotests/153.out | 76 +++++++++++++++++++++++-----------------------

 tests/qemu-iotests/182.out |  2 +-

 3 files changed, 45 insertions(+), 43 deletions(-)

diff --git a/block/file-posix.c b/block/file-posix.c

index 7e6869d..c2403ba 100644

--- a/block/file-posix.c

+++ b/block/file-posix.c

@@ -738,8 +738,6 @@ static int raw_check_lock_bytes(int fd, uint64_t perm, uint64_t shared_perm,

                            "Failed to get \"%s\" lock",

                            perm_name);

                 g_free(perm_name);

-                error_append_hint(errp,

-                                  "Is another process using the image?\n");

                 return ret;

             }

         }

@@ -755,8 +753,6 @@ static int raw_check_lock_bytes(int fd, uint64_t perm, uint64_t shared_perm,

                            "Failed to get shared \"%s\" lock",

                            perm_name);

                 g_free(perm_name);

-                error_append_hint(errp,

-                                  "Is another process using the image?\n");

                 return ret;

             }

         }

@@ -793,6 +789,9 @@ static int raw_handle_perm_lock(BlockDriverState *bs,

             if (!ret) {

                 return 0;

             }

+            error_append_hint(errp,

+                              "Is another process using the image [%s]?\n",

+                              bs->filename);

         }

         op = RAW_PL_ABORT;

         /* fall through to unlock bytes. */

@@ -2169,6 +2168,9 @@ raw_co_create(BlockdevCreateOptions *options, Error **errp)

     /* Step two: Check that nobody else has taken conflicting locks */

     result = raw_check_lock_bytes(fd, perm, shared, errp);

     if (result < 0) {

+        error_append_hint(errp,

+                          "Is another process using the image [%s]?\n",

+                          file_opts->filename);

         goto out_unlock;

     }

diff --git a/tests/qemu-iotests/153.out b/tests/qemu-iotests/153.out

index 93eaf10..8842548 100644

--- a/tests/qemu-iotests/153.out

+++ b/tests/qemu-iotests/153.out

@@ -12,11 +12,11 @@ Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=33554432 backing_file=TEST_DIR/t

 == Launching another QEMU, opts: '' ==

 QEMU_PROG: -drive file=TEST_DIR/t.qcow2,if=none,: Failed to get "write" lock

-Is another process using the image?

+Is another process using the image [TEST_DIR/t.qcow2]?

 == Launching another QEMU, opts: 'read-only=on' ==

 QEMU_PROG: -drive file=TEST_DIR/t.qcow2,if=none,read-only=on: Failed to get shared "write" lock

-Is another process using the image?

+Is another process using the image [TEST_DIR/t.qcow2]?

 == Launching another QEMU, opts: 'read-only=on,force-share=on' ==

@@ -24,77 +24,77 @@ Is another process using the image?

 _qemu_io_wrapper -c read 0 512 TEST_DIR/t.qcow2

 can't open device TEST_DIR/t.qcow2: Failed to get "write" lock

-Is another process using the image?

+Is another process using the image [TEST_DIR/t.qcow2]?

 _qemu_io_wrapper -r -c read 0 512 TEST_DIR/t.qcow2

 can't open device TEST_DIR/t.qcow2: Failed to get shared "write" lock

-Is another process using the image?

+Is another process using the image [TEST_DIR/t.qcow2]?

 _qemu_io_wrapper -c open  TEST_DIR/t.qcow2 -c read 0 512

 can't open device TEST_DIR/t.qcow2: Failed to get "write" lock

-Is another process using the image?

+Is another process using the image [TEST_DIR/t.qcow2]?

 no file open, try 'help open'

 _qemu_io_wrapper -c open -r  TEST_DIR/t.qcow2 -c read 0 512

 can't open device TEST_DIR/t.qcow2: Failed to get shared "write" lock

-Is another process using the image?

+Is another process using the image [TEST_DIR/t.qcow2]?

 no file open, try 'help open'

 _qemu_img_wrapper info TEST_DIR/t.qcow2

 qemu-img: Could not open 'TEST_DIR/t.qcow2': Failed to get shared "write" lock

-Is another process using the image?

+Is another process using the image [TEST_DIR/t.qcow2]?

 _qemu_img_wrapper check TEST_DIR/t.qcow2

 qemu-img: Could not open 'TEST_DIR/t.qcow2': Failed to get shared "write" lock

-Is another process using the image?

+Is another process using the image [TEST_DIR/t.qcow2]?

 _qemu_img_wrapper compare TEST_DIR/t.qcow2 TEST_DIR/t.qcow2

 qemu-img: Could not open 'TEST_DIR/t.qcow2': Failed to get shared "write" lock

-Is another process using the image?

+Is another process using the image [TEST_DIR/t.qcow2]?

 _qemu_img_wrapper map TEST_DIR/t.qcow2

 qemu-img: Could not open 'TEST_DIR/t.qcow2': Failed to get shared "write" lock

-Is another process using the image?

+Is another process using the image [TEST_DIR/t.qcow2]?

 _qemu_img_wrapper amend -o  TEST_DIR/t.qcow2

 qemu-img: Could not open 'TEST_DIR/t.qcow2': Failed to get "write" lock

-Is another process using the image?

+Is another process using the image [TEST_DIR/t.qcow2]?

 _qemu_img_wrapper commit TEST_DIR/t.qcow2

 qemu-img: Could not open 'TEST_DIR/t.qcow2': Failed to get "write" lock

-Is another process using the image?

+Is another process using the image [TEST_DIR/t.qcow2]?

 _qemu_img_wrapper resize TEST_DIR/t.qcow2 32M

 qemu-img: Could not open 'TEST_DIR/t.qcow2': Failed to get "write" lock

-Is another process using the image?

+Is another process using the image [TEST_DIR/t.qcow2]?

 _qemu_img_wrapper rebase TEST_DIR/t.qcow2 -b TEST_DIR/t.qcow2.base

 qemu-img: Could not open 'TEST_DIR/t.qcow2': Failed to get "write" lock

-Is another process using the image?

+Is another process using the image [TEST_DIR/t.qcow2]?

 _qemu_img_wrapper snapshot -l TEST_DIR/t.qcow2

 qemu-img: Could not open 'TEST_DIR/t.qcow2': Failed to get shared "write" lock

-Is another process using the image?

+Is another process using the image [TEST_DIR/t.qcow2]?

 _qemu_img_wrapper convert TEST_DIR/t.qcow2 TEST_DIR/t.qcow2.convert

 qemu-img: Could not open 'TEST_DIR/t.qcow2': Failed to get shared "write" lock

-Is another process using the image?

+Is another process using the image [TEST_DIR/t.qcow2]?

 _qemu_img_wrapper dd if=TEST_DIR/t.qcow2 of=TEST_DIR/t.qcow2.convert bs=512 count=1

 qemu-img: Could not open 'TEST_DIR/t.qcow2': Failed to get shared "write" lock

-Is another process using the image?

+Is another process using the image [TEST_DIR/t.qcow2]?

 _qemu_img_wrapper bench -c 1 TEST_DIR/t.qcow2

 qemu-img: Could not open 'TEST_DIR/t.qcow2': Failed to get shared "write" lock

-Is another process using the image?

+Is another process using the image [TEST_DIR/t.qcow2]?

 _qemu_img_wrapper bench -w -c 1 TEST_DIR/t.qcow2

 qemu-img: Could not open 'TEST_DIR/t.qcow2': Failed to get "write" lock

-Is another process using the image?

+Is another process using the image [TEST_DIR/t.qcow2]?

 _qemu_img_wrapper create -f qcow2 TEST_DIR/t.qcow2 -b TEST_DIR/t.qcow2.base

 qemu-img: TEST_DIR/t.qcow2: Failed to get "write" lock

-Is another process using the image?

+Is another process using the image [TEST_DIR/t.qcow2]?

 file format: IMGFMT

 == Running utility commands -U ==

@@ -132,7 +132,7 @@ Try 'qemu-img --help' for more information

 _qemu_img_wrapper rebase -U TEST_DIR/t.qcow2 -b TEST_DIR/t.qcow2.base

 qemu-img: Could not open 'TEST_DIR/t.qcow2': Failed to get "write" lock

-Is another process using the image?

+Is another process using the image [TEST_DIR/t.qcow2]?

 _qemu_img_wrapper snapshot -l -U TEST_DIR/t.qcow2

@@ -157,7 +157,7 @@ Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=33554432 backing_file=TEST_DIR/t

 == Launching another QEMU, opts: '' ==

 QEMU_PROG: -drive file=TEST_DIR/t.qcow2,if=none,: Failed to get "write" lock

-Is another process using the image?

+Is another process using the image [TEST_DIR/t.qcow2]?

 == Launching another QEMU, opts: 'read-only=on' ==

@@ -167,13 +167,13 @@ Is another process using the image?

 _qemu_io_wrapper -c read 0 512 TEST_DIR/t.qcow2

 can't open device TEST_DIR/t.qcow2: Failed to get "write" lock

-Is another process using the image?

+Is another process using the image [TEST_DIR/t.qcow2]?

 _qemu_io_wrapper -r -c read 0 512 TEST_DIR/t.qcow2

 _qemu_io_wrapper -c open  TEST_DIR/t.qcow2 -c read 0 512

 can't open device TEST_DIR/t.qcow2: Failed to get "write" lock

-Is another process using the image?

+Is another process using the image [TEST_DIR/t.qcow2]?

 no file open, try 'help open'

 _qemu_io_wrapper -c open -r  TEST_DIR/t.qcow2 -c read 0 512

@@ -188,19 +188,19 @@ _qemu_img_wrapper map TEST_DIR/t.qcow2

 _qemu_img_wrapper amend -o  TEST_DIR/t.qcow2

 qemu-img: Could not open 'TEST_DIR/t.qcow2': Failed to get "write" lock

-Is another process using the image?

+Is another process using the image [TEST_DIR/t.qcow2]?

 _qemu_img_wrapper commit TEST_DIR/t.qcow2

 qemu-img: Could not open 'TEST_DIR/t.qcow2': Failed to get "write" lock

-Is another process using the image?

+Is another process using the image [TEST_DIR/t.qcow2]?

 _qemu_img_wrapper resize TEST_DIR/t.qcow2 32M

 qemu-img: Could not open 'TEST_DIR/t.qcow2': Failed to get "write" lock

-Is another process using the image?

+Is another process using the image [TEST_DIR/t.qcow2]?

 _qemu_img_wrapper rebase TEST_DIR/t.qcow2 -b TEST_DIR/t.qcow2.base

 qemu-img: Could not open 'TEST_DIR/t.qcow2': Failed to get "write" lock

-Is another process using the image?

+Is another process using the image [TEST_DIR/t.qcow2]?

 _qemu_img_wrapper snapshot -l TEST_DIR/t.qcow2

@@ -212,11 +212,11 @@ _qemu_img_wrapper bench -c 1 TEST_DIR/t.qcow2

 _qemu_img_wrapper bench -w -c 1 TEST_DIR/t.qcow2

 qemu-img: Could not open 'TEST_DIR/t.qcow2': Failed to get "write" lock

-Is another process using the image?

+Is another process using the image [TEST_DIR/t.qcow2]?

 _qemu_img_wrapper create -f qcow2 TEST_DIR/t.qcow2 -b TEST_DIR/t.qcow2.base

 qemu-img: TEST_DIR/t.qcow2: Failed to get "write" lock

-Is another process using the image?

+Is another process using the image [TEST_DIR/t.qcow2]?

 file format: IMGFMT

 == Running utility commands -U ==

@@ -254,7 +254,7 @@ Try 'qemu-img --help' for more information

 _qemu_img_wrapper rebase -U TEST_DIR/t.qcow2 -b TEST_DIR/t.qcow2.base

 qemu-img: Could not open 'TEST_DIR/t.qcow2': Failed to get "write" lock

-Is another process using the image?

+Is another process using the image [TEST_DIR/t.qcow2]?

 _qemu_img_wrapper snapshot -l -U TEST_DIR/t.qcow2

@@ -372,17 +372,17 @@ Round done

 == Two devices with the same image (read-only=off - read-only=off) ==

 QEMU_PROG: -drive if=none,file=TEST_DIR/t.qcow2,read-only=off: Failed to get "write" lock

-Is another process using the image?

+Is another process using the image [TEST_DIR/t.qcow2]?

 == Two devices with the same image (read-only=off - read-only=on) ==

 QEMU_PROG: -drive if=none,file=TEST_DIR/t.qcow2,read-only=on: Failed to get shared "write" lock

-Is another process using the image?

+Is another process using the image [TEST_DIR/t.qcow2]?

 == Two devices with the same image (read-only=off - read-only=on,force-share=on) ==

 == Two devices with the same image (read-only=on - read-only=off) ==

 QEMU_PROG: -drive if=none,file=TEST_DIR/t.qcow2,read-only=off: Failed to get "write" lock

-Is another process using the image?

+Is another process using the image [TEST_DIR/t.qcow2]?

 == Two devices with the same image (read-only=on - read-only=on) ==

@@ -403,13 +403,13 @@ Formatting 'TEST_DIR/t.IMGFMT.c', fmt=IMGFMT size=33554432 backing_file=TEST_DIR

 == Backing image also as an active device ==

 QEMU_PROG: -drive if=none,file=TEST_DIR/t.qcow2: Failed to get "write" lock

-Is another process using the image?

+Is another process using the image [TEST_DIR/t.qcow2]?

 == Backing image also as an active device (ro) ==

 == Symbolic link ==

 QEMU_PROG: -drive if=none,file=TEST_DIR/t.qcow2: Failed to get "write" lock

-Is another process using the image?

+Is another process using the image [TEST_DIR/t.qcow2]?

 == Active commit to intermediate layer should work when base in use ==

 {"return": {}}

@@ -420,7 +420,7 @@ Adding drive

 _qemu_io_wrapper TEST_DIR/t.qcow2 -c write 0 512

 can't open device TEST_DIR/t.qcow2: Failed to get "write" lock

-Is another process using the image?

+Is another process using the image [TEST_DIR/t.qcow2]?

 Creating overlay with qemu-img when the guest is running should be allowed

 _qemu_img_wrapper create -f qcow2 -b TEST_DIR/t.qcow2 TEST_DIR/t.qcow2.overlay

@@ -433,7 +433,7 @@ _qemu_img_wrapper info TEST_DIR/t.qcow2

 _qemu_io_wrapper TEST_DIR/t.qcow2 -c write 0 512

 can't open device TEST_DIR/t.qcow2: Failed to get "write" lock

-Is another process using the image?

+Is another process using the image [TEST_DIR/t.qcow2]?

 Closing the other

 _qemu_io_wrapper TEST_DIR/t.qcow2 -c write 0 512

diff --git a/tests/qemu-iotests/182.out b/tests/qemu-iotests/182.out

index 23a4dbf..f1463c8 100644

--- a/tests/qemu-iotests/182.out

+++ b/tests/qemu-iotests/182.out

@@ -4,5 +4,5 @@ Starting QEMU

 Starting a second QEMU using the same image should fail

 QEMU_PROG: -drive file=TEST_DIR/t.qcow2,if=none,id=drive0,file.locking=on: Failed to get "write" lock

-Is another process using the image?

+Is another process using the image [TEST_DIR/t.qcow2]?

 *** done

-- 

1.8.3.1