Register fs netlink interface and send proper warning if ENOSPC is
encountered. Note that we differentiate between enospc for metadata and
enospc for data.
Signed-off-by: Lukas Czerner <lczer...@redhat.com>
Cc: Chris Mason <chris.ma...@oracle.com>
Cc: linux-btrfs@vger.kernel.org
---
fs/btrfs/extent-tree.c | 13 ++++++++++---
fs/btrfs/super.c | 1 +
2 files changed, 11 insertions(+), 3 deletions(-)
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 66bac22..a47d9b9 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -3029,13 +3029,14 @@ int btrfs_check_data_free_space(struct inode *inode,
u64 bytes)
{
struct btrfs_space_info *data_sinfo;
struct btrfs_root *root = BTRFS_I(inode)->root;
+ struct btrfs_fs_info *fs_info = root->fs_info;
u64 used;
int ret = 0, committed = 0, alloc_chunk = 1;
/* make sure bytes are sectorsize aligned */
bytes = (bytes + root->sectorsize - 1) & ~((u64)root->sectorsize - 1);
- if (root == root->fs_info->tree_root ||
+ if (root == fs_info->tree_root ||
BTRFS_I(inode)->location.objectid == BTRFS_FREE_INO_OBJECTID) {
alloc_chunk = 0;
committed = 1;
@@ -3070,7 +3071,7 @@ alloc:
if (IS_ERR(trans))
return PTR_ERR(trans);
- ret = do_chunk_alloc(trans, root->fs_info->extent_root,
+ ret = do_chunk_alloc(trans, fs_info->extent_root,
bytes + 2 * 1024 * 1024,
alloc_target,
CHUNK_ALLOC_NO_FORCE);
@@ -3100,7 +3101,7 @@ alloc:
/* commit the current transaction and try again */
commit_trans:
if (!committed &&
- !atomic_read(&root->fs_info->open_ioctl_trans)) {
+ !atomic_read(&fs_info->open_ioctl_trans)) {
committed = 1;
trans = btrfs_join_transaction(root);
if (IS_ERR(trans))
@@ -3111,6 +3112,8 @@ commit_trans:
goto again;
}
+ fs_nl_send_warning(fs_info->fs_devices->latest_bdev->bd_dev,
+ FS_NL_ENOSPC_WARN);
return -ENOSPC;
}
data_sinfo->bytes_may_use += bytes;
@@ -3522,6 +3525,10 @@ again:
}
out:
+ if (unlikely(-ENOSPC == ret)) {
+ dev_t bdev = root->fs_info->fs_devices->latest_bdev->bd_dev;
+ fs_nl_send_warning(bdev, FS_NL_META_ENOSPC_WARN);
+ }
if (flushing) {
spin_lock(&space_info->lock);
space_info->flush = 0;
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 15634d4..8ac9e01 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -1266,6 +1266,7 @@ static int __init init_btrfs_fs(void)
if (err)
goto unregister_ioctl;
+ init_fs_nl_family();
printk(KERN_INFO "%s loaded\n", BTRFS_BUILD_VERSION);
return 0;
--
1.7.4.4
--
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