[PATCH v3 4/6] btrfs-progs: check/lowmem mode: Check inline extent size

[Qu Wenruo]

Signed-off-by: Qu Wenruo <w...@suse.com>
---
 check/mode-lowmem.c | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/check/mode-lowmem.c b/check/mode-lowmem.c
index 62bcf3d2e126..e5446f9c7280 100644
--- a/check/mode-lowmem.c
+++ b/check/mode-lowmem.c
@@ -1417,6 +1417,8 @@ static int check_file_extent(struct btrfs_root *root, 
struct btrfs_key *fkey,
        u64 csum_found;         /* In byte size, sectorsize aligned */
        u64 search_start;       /* Logical range start we search for csum */
        u64 search_len;         /* Logical range len we search for csum */
+       u32 max_inline_extent_size = min_t(u32, root->fs_info->sectorsize - 1,
+                               BTRFS_MAX_INLINE_DATA_SIZE(root->fs_info));
        unsigned int extent_type;
        unsigned int is_hole;
        int compressed = 0;
@@ -1440,6 +1442,32 @@ static int check_file_extent(struct btrfs_root *root, 
struct btrfs_key *fkey,
                                root->objectid, fkey->objectid, fkey->offset);
                        err |= FILE_EXTENT_ERROR;
                }
+               if (compressed) {
+                       if (extent_num_bytes > root->fs_info->sectorsize) {
+                               error(
+"root %llu EXTENT_DATA[%llu %llu] too large inline extent ram size, have %llu, 
max: %u",
+                                       root->objectid, fkey->objectid,
+                                       fkey->offset, extent_num_bytes,
+                                       root->fs_info->sectorsize - 1);
+                               err |= FILE_EXTENT_ERROR;
+                       }
+                       if (item_inline_len > max_inline_extent_size) {
+                               error(
+"root %llu EXTENT_DATA[%llu %llu] too large inline extent on-disk size, have 
%u, max: %u",
+                                       root->objectid, fkey->objectid,
+                                       fkey->offset, item_inline_len,
+                                       max_inline_extent_size);
+                               err |= FILE_EXTENT_ERROR;
+                       }
+               } else {
+                       if (extent_num_bytes > max_inline_extent_size) {
+                       error(
+ "root %llu EXTENT_DATA[%llu %llu] too large inline extent size, have %llu, 
max: %u",
+                               root->objectid, fkey->objectid, fkey->offset,
+                               extent_num_bytes, max_inline_extent_size);
+                               err |= FILE_EXTENT_ERROR;
+                       }
+               }
                if (!compressed && extent_num_bytes != item_inline_len) {
                        error(
                "root %llu EXTENT_DATA[%llu %llu] wrong inline size, have: 
%llu, expected: %u",
-- 
2.16.2

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