btrfs: fix upper limit for max_inline for page size 64K

commit 6f93e834fa7c5faa0372e46828b4b2a966ac61d7 upstream.

The mount option max_inline ranges from 0 to the sectorsize (which is
now equal to page size). But we parse the mount options too early and
before the actual sectorsize is read from the superblock. So the upper
limit of max_inline is unaware of the actual sectorsize and is limited
by the temporary sectorsize 4096, even on a system where the default
sectorsize is 64K.

Fix this by reading the superblock sectorsize before the mount option
parse.

Reported-by: Alexander Tsvetkov <alexander.tsvetkov@oracle.com>
CC: stable@vger.kernel.org # 5.4+
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index dacd67dca43fe02306dee1c94cf31a14983991d7..946ae198b3449f0f2d54366523a510eb2d1c72e5 100644 (file)
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -2894,6 +2894,29 @@ int open_ctree(struct super_block *sb,
         */
        fs_info->compress_type = BTRFS_COMPRESS_ZLIB;
 
+       /*
+        * Flag our filesystem as having big metadata blocks if they are bigger
+        * than the page size
+        */
+       if (btrfs_super_nodesize(disk_super) > PAGE_SIZE) {
+               if (!(features & BTRFS_FEATURE_INCOMPAT_BIG_METADATA))
+                       btrfs_info(fs_info,
+                               "flagging fs with big metadata feature");
+               features |= BTRFS_FEATURE_INCOMPAT_BIG_METADATA;
+       }
+
+       /* Set up fs_info before parsing mount options */
+       nodesize = btrfs_super_nodesize(disk_super);
+       sectorsize = btrfs_super_sectorsize(disk_super);
+       stripesize = sectorsize;
+       fs_info->dirty_metadata_batch = nodesize * (1 + ilog2(nr_cpu_ids));
+       fs_info->delalloc_batch = sectorsize * 512 * (1 + ilog2(nr_cpu_ids));
+
+       /* Cache block sizes */
+       fs_info->nodesize = nodesize;
+       fs_info->sectorsize = sectorsize;
+       fs_info->stripesize = stripesize;
+
        ret = btrfs_parse_options(fs_info, options, sb->s_flags);
        if (ret) {
                err = ret;
@@ -2920,28 +2943,6 @@ int open_ctree(struct super_block *sb,
        if (features & BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA)
                btrfs_info(fs_info, "has skinny extents");
 
-       /*
-        * flag our filesystem as having big metadata blocks if
-        * they are bigger than the page size
-        */
-       if (btrfs_super_nodesize(disk_super) > PAGE_SIZE) {
-               if (!(features & BTRFS_FEATURE_INCOMPAT_BIG_METADATA))
-                       btrfs_info(fs_info,
-                               "flagging fs with big metadata feature");
-               features |= BTRFS_FEATURE_INCOMPAT_BIG_METADATA;
-       }
-
-       nodesize = btrfs_super_nodesize(disk_super);
-       sectorsize = btrfs_super_sectorsize(disk_super);
-       stripesize = sectorsize;
-       fs_info->dirty_metadata_batch = nodesize * (1 + ilog2(nr_cpu_ids));
-       fs_info->delalloc_batch = sectorsize * 512 * (1 + ilog2(nr_cpu_ids));
-
-       /* Cache block sizes */
-       fs_info->nodesize = nodesize;
-       fs_info->sectorsize = sectorsize;
-       fs_info->stripesize = stripesize;
-
        /*
         * mixed block groups end up with duplicate but slightly offset
         * extent buffers for the same range.  It leads to corruptions