Merge remote-tracking branch 'remotes/kevin/tags/for-upstream' into staging

Block layer patches:

- file-posix: Fix max transfer length for non-SCSI-passthrough
- iotests: Fix 082 reference output

# gpg: Signature made Fri 12 Jul 2019 14:49:14 BST
# gpg:                using RSA key 7F09B272C88F2FD6
# gpg: Good signature from "Kevin Wolf <kwolf@redhat.com>" [full]
# Primary key fingerprint: DC3D EB15 9A9A F95D 3D74  56FE 7F09 B272 C88F 2FD6

* remotes/kevin/tags/for-upstream:
  file-posix: Use max transfer length/segment count only for SCSI passthrough
  iotests: Update 082 expected output

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

2 files changed, 55 insertions, 53 deletions

diff --git a/block/file-posix.c b/block/file-posix.c
index ab05b51a66..4479cc7ab4 100644
--- a/block/file-posix.c
+++ b/block/file-posix.c
@@ -1038,15 +1038,13 @@ static void raw_reopen_abort(BDRVReopenState *state)
     s->reopen_state = NULL;
 }
 
-static int hdev_get_max_transfer_length(BlockDriverState *bs, int fd)
+static int sg_get_max_transfer_length(int fd)
 {
 #ifdef BLKSECTGET
     int max_bytes = 0;
-    short max_sectors = 0;
-    if (bs->sg && ioctl(fd, BLKSECTGET, &max_bytes) == 0) {
+
+    if (ioctl(fd, BLKSECTGET, &max_bytes) == 0) {
         return max_bytes;
-    } else if (!bs->sg && ioctl(fd, BLKSECTGET, &max_sectors) == 0) {
-        return max_sectors << BDRV_SECTOR_BITS;
     } else {
         return -errno;
     }
@@ -1055,25 +1053,31 @@ static int hdev_get_max_transfer_length(BlockDriverState *bs, int fd)
 #endif
 }
 
-static int hdev_get_max_segments(const struct stat *st)
+static int sg_get_max_segments(int fd)
 {
 #ifdef CONFIG_LINUX
     char buf[32];
     const char *end;
-    char *sysfspath;
+    char *sysfspath = NULL;
     int ret;
-    int fd = -1;
+    int sysfd = -1;
     long max_segments;
+    struct stat st;
+
+    if (fstat(fd, &st)) {
+        ret = -errno;
+        goto out;
+    }
 
     sysfspath = g_strdup_printf("/sys/dev/block/%u:%u/queue/max_segments",
-                                major(st->st_rdev), minor(st->st_rdev));
-    fd = open(sysfspath, O_RDONLY);
-    if (fd == -1) {
+                                major(st.st_rdev), minor(st.st_rdev));
+    sysfd = open(sysfspath, O_RDONLY);
+    if (sysfd == -1) {
         ret = -errno;
         goto out;
     }
     do {
-        ret = read(fd, buf, sizeof(buf) - 1);
+        ret = read(sysfd, buf, sizeof(buf) - 1);
     } while (ret == -1 && errno == EINTR);
     if (ret < 0) {
         ret = -errno;
@@ -1090,8 +1094,8 @@ static int hdev_get_max_segments(const struct stat *st)
     }
 
 out:
-    if (fd != -1) {
-        close(fd);
+    if (sysfd != -1) {
+        close(sysfd);
     }
     g_free(sysfspath);
     return ret;
@@ -1103,19 +1107,17 @@ out:
 static void raw_refresh_limits(BlockDriverState *bs, Error **errp)
 {
     BDRVRawState *s = bs->opaque;
-    struct stat st;
 
-    if (!fstat(s->fd, &st)) {
-        if (S_ISBLK(st.st_mode) || S_ISCHR(st.st_mode)) {
-            int ret = hdev_get_max_transfer_length(bs, s->fd);
-            if (ret > 0 && ret <= BDRV_REQUEST_MAX_BYTES) {
-                bs->bl.max_transfer = pow2floor(ret);
-            }
-            ret = hdev_get_max_segments(&st);
-            if (ret > 0) {
-                bs->bl.max_transfer = MIN(bs->bl.max_transfer,
-                                          ret * getpagesize());
-            }
+    if (bs->sg) {
+        int ret = sg_get_max_transfer_length(s->fd);
+
+        if (ret > 0 && ret <= BDRV_REQUEST_MAX_BYTES) {
+            bs->bl.max_transfer = pow2floor(ret);
+        }
+
+        ret = sg_get_max_segments(s->fd);
+        if (ret > 0) {
+            bs->bl.max_transfer = MIN(bs->bl.max_transfer, ret * getpagesize());
         }
     }
 
diff --git a/tests/qemu-iotests/082.out b/tests/qemu-iotests/082.out
index 58de358b38..9d4ed4dc9d 100644
--- a/tests/qemu-iotests/082.out
+++ b/tests/qemu-iotests/082.out
@@ -47,7 +47,7 @@ Supported options:
   backing_file=<str>     - File name of a base image
   backing_fmt=<str>      - Image format of the base image
   cluster_size=<size>    - qcow2 cluster size
-  compat=<str>           - Compatibility level (0.10 or 1.1)
+  compat=<str>           - Compatibility level (v2 [0.10] or v3 [1.1])
   data_file=<str>        - File name of an external data file
   data_file_raw=<bool (on/off)> - The external data file must stay valid as a raw image
   encrypt.cipher-alg=<str> - Name of encryption cipher algorithm
@@ -70,7 +70,7 @@ Supported options:
   backing_file=<str>     - File name of a base image
   backing_fmt=<str>      - Image format of the base image
   cluster_size=<size>    - qcow2 cluster size
-  compat=<str>           - Compatibility level (0.10 or 1.1)
+  compat=<str>           - Compatibility level (v2 [0.10] or v3 [1.1])
   data_file=<str>        - File name of an external data file
   data_file_raw=<bool (on/off)> - The external data file must stay valid as a raw image
   encrypt.cipher-alg=<str> - Name of encryption cipher algorithm
@@ -93,7 +93,7 @@ Supported options:
   backing_file=<str>     - File name of a base image
   backing_fmt=<str>      - Image format of the base image
   cluster_size=<size>    - qcow2 cluster size
-  compat=<str>           - Compatibility level (0.10 or 1.1)
+  compat=<str>           - Compatibility level (v2 [0.10] or v3 [1.1])
   data_file=<str>        - File name of an external data file
   data_file_raw=<bool (on/off)> - The external data file must stay valid as a raw image
   encrypt.cipher-alg=<str> - Name of encryption cipher algorithm
@@ -116,7 +116,7 @@ Supported options:
   backing_file=<str>     - File name of a base image
   backing_fmt=<str>      - Image format of the base image
   cluster_size=<size>    - qcow2 cluster size
-  compat=<str>           - Compatibility level (0.10 or 1.1)
+  compat=<str>           - Compatibility level (v2 [0.10] or v3 [1.1])
   data_file=<str>        - File name of an external data file
   data_file_raw=<bool (on/off)> - The external data file must stay valid as a raw image
   encrypt.cipher-alg=<str> - Name of encryption cipher algorithm
@@ -139,7 +139,7 @@ Supported options:
   backing_file=<str>     - File name of a base image
   backing_fmt=<str>      - Image format of the base image
   cluster_size=<size>    - qcow2 cluster size
-  compat=<str>           - Compatibility level (0.10 or 1.1)
+  compat=<str>           - Compatibility level (v2 [0.10] or v3 [1.1])
   data_file=<str>        - File name of an external data file
   data_file_raw=<bool (on/off)> - The external data file must stay valid as a raw image
   encrypt.cipher-alg=<str> - Name of encryption cipher algorithm
@@ -162,7 +162,7 @@ Supported options:
   backing_file=<str>     - File name of a base image
   backing_fmt=<str>      - Image format of the base image
   cluster_size=<size>    - qcow2 cluster size
-  compat=<str>           - Compatibility level (0.10 or 1.1)
+  compat=<str>           - Compatibility level (v2 [0.10] or v3 [1.1])
   data_file=<str>        - File name of an external data file
   data_file_raw=<bool (on/off)> - The external data file must stay valid as a raw image
   encrypt.cipher-alg=<str> - Name of encryption cipher algorithm
@@ -185,7 +185,7 @@ Supported options:
   backing_file=<str>     - File name of a base image
   backing_fmt=<str>      - Image format of the base image
   cluster_size=<size>    - qcow2 cluster size
-  compat=<str>           - Compatibility level (0.10 or 1.1)
+  compat=<str>           - Compatibility level (v2 [0.10] or v3 [1.1])
   data_file=<str>        - File name of an external data file
   data_file_raw=<bool (on/off)> - The external data file must stay valid as a raw image
   encrypt.cipher-alg=<str> - Name of encryption cipher algorithm
@@ -208,7 +208,7 @@ Supported options:
   backing_file=<str>     - File name of a base image
   backing_fmt=<str>      - Image format of the base image
   cluster_size=<size>    - qcow2 cluster size
-  compat=<str>           - Compatibility level (0.10 or 1.1)
+  compat=<str>           - Compatibility level (v2 [0.10] or v3 [1.1])
   data_file=<str>        - File name of an external data file
   data_file_raw=<bool (on/off)> - The external data file must stay valid as a raw image
   encrypt.cipher-alg=<str> - Name of encryption cipher algorithm
@@ -246,7 +246,7 @@ Supported qcow2 options:
   backing_file=<str>     - File name of a base image
   backing_fmt=<str>      - Image format of the base image
   cluster_size=<size>    - qcow2 cluster size
-  compat=<str>           - Compatibility level (0.10 or 1.1)
+  compat=<str>           - Compatibility level (v2 [0.10] or v3 [1.1])
   data_file=<str>        - File name of an external data file
   data_file_raw=<bool (on/off)> - The external data file must stay valid as a raw image
   encrypt.cipher-alg=<str> - Name of encryption cipher algorithm
@@ -327,7 +327,7 @@ Supported options:
   backing_file=<str>     - File name of a base image
   backing_fmt=<str>      - Image format of the base image
   cluster_size=<size>    - qcow2 cluster size
-  compat=<str>           - Compatibility level (0.10 or 1.1)
+  compat=<str>           - Compatibility level (v2 [0.10] or v3 [1.1])
   data_file=<str>        - File name of an external data file
   data_file_raw=<bool (on/off)> - The external data file must stay valid as a raw image
   encrypt.cipher-alg=<str> - Name of encryption cipher algorithm
@@ -350,7 +350,7 @@ Supported options:
   backing_file=<str>     - File name of a base image
   backing_fmt=<str>      - Image format of the base image
   cluster_size=<size>    - qcow2 cluster size
-  compat=<str>           - Compatibility level (0.10 or 1.1)
+  compat=<str>           - Compatibility level (v2 [0.10] or v3 [1.1])
   data_file=<str>        - File name of an external data file
   data_file_raw=<bool (on/off)> - The external data file must stay valid as a raw image
   encrypt.cipher-alg=<str> - Name of encryption cipher algorithm
@@ -373,7 +373,7 @@ Supported options:
   backing_file=<str>     - File name of a base image
   backing_fmt=<str>      - Image format of the base image
   cluster_size=<size>    - qcow2 cluster size
-  compat=<str>           - Compatibility level (0.10 or 1.1)
+  compat=<str>           - Compatibility level (v2 [0.10] or v3 [1.1])
   data_file=<str>        - File name of an external data file
   data_file_raw=<bool (on/off)> - The external data file must stay valid as a raw image
   encrypt.cipher-alg=<str> - Name of encryption cipher algorithm
@@ -396,7 +396,7 @@ Supported options:
   backing_file=<str>     - File name of a base image
   backing_fmt=<str>      - Image format of the base image
   cluster_size=<size>    - qcow2 cluster size
-  compat=<str>           - Compatibility level (0.10 or 1.1)
+  compat=<str>           - Compatibility level (v2 [0.10] or v3 [1.1])
   data_file=<str>        - File name of an external data file
   data_file_raw=<bool (on/off)> - The external data file must stay valid as a raw image
   encrypt.cipher-alg=<str> - Name of encryption cipher algorithm
@@ -419,7 +419,7 @@ Supported options:
   backing_file=<str>     - File name of a base image
   backing_fmt=<str>      - Image format of the base image
   cluster_size=<size>    - qcow2 cluster size
-  compat=<str>           - Compatibility level (0.10 or 1.1)
+  compat=<str>           - Compatibility level (v2 [0.10] or v3 [1.1])
   data_file=<str>        - File name of an external data file
   data_file_raw=<bool (on/off)> - The external data file must stay valid as a raw image
   encrypt.cipher-alg=<str> - Name of encryption cipher algorithm
@@ -442,7 +442,7 @@ Supported options:
   backing_file=<str>     - File name of a base image
   backing_fmt=<str>      - Image format of the base image
   cluster_size=<size>    - qcow2 cluster size
-  compat=<str>           - Compatibility level (0.10 or 1.1)
+  compat=<str>           - Compatibility level (v2 [0.10] or v3 [1.1])
   data_file=<str>        - File name of an external data file
   data_file_raw=<bool (on/off)> - The external data file must stay valid as a raw image
   encrypt.cipher-alg=<str> - Name of encryption cipher algorithm
@@ -465,7 +465,7 @@ Supported options:
   backing_file=<str>     - File name of a base image
   backing_fmt=<str>      - Image format of the base image
   cluster_size=<size>    - qcow2 cluster size
-  compat=<str>           - Compatibility level (0.10 or 1.1)
+  compat=<str>           - Compatibility level (v2 [0.10] or v3 [1.1])
   data_file=<str>        - File name of an external data file
   data_file_raw=<bool (on/off)> - The external data file must stay valid as a raw image
   encrypt.cipher-alg=<str> - Name of encryption cipher algorithm
@@ -488,7 +488,7 @@ Supported options:
   backing_file=<str>     - File name of a base image
   backing_fmt=<str>      - Image format of the base image
   cluster_size=<size>    - qcow2 cluster size
-  compat=<str>           - Compatibility level (0.10 or 1.1)
+  compat=<str>           - Compatibility level (v2 [0.10] or v3 [1.1])
   data_file=<str>        - File name of an external data file
   data_file_raw=<bool (on/off)> - The external data file must stay valid as a raw image
   encrypt.cipher-alg=<str> - Name of encryption cipher algorithm
@@ -526,7 +526,7 @@ Supported qcow2 options:
   backing_file=<str>     - File name of a base image
   backing_fmt=<str>      - Image format of the base image
   cluster_size=<size>    - qcow2 cluster size
-  compat=<str>           - Compatibility level (0.10 or 1.1)
+  compat=<str>           - Compatibility level (v2 [0.10] or v3 [1.1])
   data_file=<str>        - File name of an external data file
   data_file_raw=<bool (on/off)> - The external data file must stay valid as a raw image
   encrypt.cipher-alg=<str> - Name of encryption cipher algorithm
@@ -618,7 +618,7 @@ Creation options for 'qcow2':
   backing_file=<str>     - File name of a base image
   backing_fmt=<str>      - Image format of the base image
   cluster_size=<size>    - qcow2 cluster size
-  compat=<str>           - Compatibility level (0.10 or 1.1)
+  compat=<str>           - Compatibility level (v2 [0.10] or v3 [1.1])
   data_file=<str>        - File name of an external data file
   data_file_raw=<bool (on/off)> - The external data file must stay valid as a raw image
   encrypt.cipher-alg=<str> - Name of encryption cipher algorithm
@@ -642,7 +642,7 @@ Creation options for 'qcow2':
   backing_file=<str>     - File name of a base image
   backing_fmt=<str>      - Image format of the base image
   cluster_size=<size>    - qcow2 cluster size
-  compat=<str>           - Compatibility level (0.10 or 1.1)
+  compat=<str>           - Compatibility level (v2 [0.10] or v3 [1.1])
   data_file=<str>        - File name of an external data file
   data_file_raw=<bool (on/off)> - The external data file must stay valid as a raw image
   encrypt.cipher-alg=<str> - Name of encryption cipher algorithm
@@ -666,7 +666,7 @@ Creation options for 'qcow2':
   backing_file=<str>     - File name of a base image
   backing_fmt=<str>      - Image format of the base image
   cluster_size=<size>    - qcow2 cluster size
-  compat=<str>           - Compatibility level (0.10 or 1.1)
+  compat=<str>           - Compatibility level (v2 [0.10] or v3 [1.1])
   data_file=<str>        - File name of an external data file
   data_file_raw=<bool (on/off)> - The external data file must stay valid as a raw image
   encrypt.cipher-alg=<str> - Name of encryption cipher algorithm
@@ -690,7 +690,7 @@ Creation options for 'qcow2':
   backing_file=<str>     - File name of a base image
   backing_fmt=<str>      - Image format of the base image
   cluster_size=<size>    - qcow2 cluster size
-  compat=<str>           - Compatibility level (0.10 or 1.1)
+  compat=<str>           - Compatibility level (v2 [0.10] or v3 [1.1])
   data_file=<str>        - File name of an external data file
   data_file_raw=<bool (on/off)> - The external data file must stay valid as a raw image
   encrypt.cipher-alg=<str> - Name of encryption cipher algorithm
@@ -714,7 +714,7 @@ Creation options for 'qcow2':
   backing_file=<str>     - File name of a base image
   backing_fmt=<str>      - Image format of the base image
   cluster_size=<size>    - qcow2 cluster size
-  compat=<str>           - Compatibility level (0.10 or 1.1)
+  compat=<str>           - Compatibility level (v2 [0.10] or v3 [1.1])
   data_file=<str>        - File name of an external data file
   data_file_raw=<bool (on/off)> - The external data file must stay valid as a raw image
   encrypt.cipher-alg=<str> - Name of encryption cipher algorithm
@@ -738,7 +738,7 @@ Creation options for 'qcow2':
   backing_file=<str>     - File name of a base image
   backing_fmt=<str>      - Image format of the base image
   cluster_size=<size>    - qcow2 cluster size
-  compat=<str>           - Compatibility level (0.10 or 1.1)
+  compat=<str>           - Compatibility level (v2 [0.10] or v3 [1.1])
   data_file=<str>        - File name of an external data file
   data_file_raw=<bool (on/off)> - The external data file must stay valid as a raw image
   encrypt.cipher-alg=<str> - Name of encryption cipher algorithm
@@ -762,7 +762,7 @@ Creation options for 'qcow2':
   backing_file=<str>     - File name of a base image
   backing_fmt=<str>      - Image format of the base image
   cluster_size=<size>    - qcow2 cluster size
-  compat=<str>           - Compatibility level (0.10 or 1.1)
+  compat=<str>           - Compatibility level (v2 [0.10] or v3 [1.1])
   data_file=<str>        - File name of an external data file
   data_file_raw=<bool (on/off)> - The external data file must stay valid as a raw image
   encrypt.cipher-alg=<str> - Name of encryption cipher algorithm
@@ -786,7 +786,7 @@ Creation options for 'qcow2':
   backing_file=<str>     - File name of a base image
   backing_fmt=<str>      - Image format of the base image
   cluster_size=<size>    - qcow2 cluster size
-  compat=<str>           - Compatibility level (0.10 or 1.1)
+  compat=<str>           - Compatibility level (v2 [0.10] or v3 [1.1])
   data_file=<str>        - File name of an external data file
   data_file_raw=<bool (on/off)> - The external data file must stay valid as a raw image
   encrypt.cipher-alg=<str> - Name of encryption cipher algorithm
@@ -827,7 +827,7 @@ Creation options for 'qcow2':
   backing_file=<str>     - File name of a base image
   backing_fmt=<str>      - Image format of the base image
   cluster_size=<size>    - qcow2 cluster size
-  compat=<str>           - Compatibility level (0.10 or 1.1)
+  compat=<str>           - Compatibility level (v2 [0.10] or v3 [1.1])
   data_file=<str>        - File name of an external data file
   data_file_raw=<bool (on/off)> - The external data file must stay valid as a raw image
   encrypt.cipher-alg=<str> - Name of encryption cipher algorithm