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| author | Chris Mason <chris.mason@oracle.com> | 2008-04-29 09:38:00 -0400 |
|---|---|---|
| committer | Chris Mason <chris.mason@oracle.com> | 2008-09-25 11:04:02 -0400 |
| commit | a236aed14ccb0661611d4416f6b573d892bdc60a (patch) | |
| tree | b275333ab5bfaa9ea68756aa0a5c6d5c6fef5405 /fs/btrfs/disk-io.c | |
| parent | 4235298e4fc3c1a09f659cfe2fd285024eeb2241 (diff) | |
| download | lwn-a236aed14ccb0661611d4416f6b573d892bdc60a.tar.gz lwn-a236aed14ccb0661611d4416f6b573d892bdc60a.zip | |
Btrfs: Deal with failed writes in mirrored configurations
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/disk-io.c')
| -rw-r--r-- | fs/btrfs/disk-io.c | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index 1c7d84aff864..e35e70165b53 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -1385,7 +1385,10 @@ int write_all_supers(struct btrfs_root *root) struct buffer_head *bh; int ret; int do_barriers; + int max_errors; + int total_errors = 0; + max_errors = btrfs_super_num_devices(&root->fs_info->super_copy) - 1; do_barriers = !btrfs_test_opt(root, NOBARRIER); sb = root->fs_info->sb_buffer; @@ -1433,8 +1436,14 @@ int write_all_supers(struct btrfs_root *root) } else { ret = submit_bh(WRITE, bh); } - BUG_ON(ret); + if (ret) + total_errors++; } + if (total_errors > max_errors) { + printk("btrfs: %d errors while writing supers\n", total_errors); + BUG(); + } + total_errors = 0; list_for_each(cur, head) { dev = list_entry(cur, struct btrfs_device, dev_list); @@ -1454,13 +1463,17 @@ int write_all_supers(struct btrfs_root *root) wait_on_buffer(bh); BUG_ON(!buffer_uptodate(bh)); } else { - BUG(); + total_errors++; } } dev->pending_io = NULL; brelse(bh); } + if (total_errors > max_errors) { + printk("btrfs: %d errors while writing supers\n", total_errors); + BUG(); + } return 0; } |