diff options
| -rw-r--r-- | fs/btrfs/ctree.h | 45 | ||||
| -rw-r--r-- | fs/btrfs/disk-io.c | 6 | ||||
| -rw-r--r-- | fs/btrfs/transaction.c | 16 | ||||
| -rw-r--r-- | fs/btrfs/transaction.h | 2 |
4 files changed, 69 insertions, 0 deletions
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index fe69edda11fb..f30b061ef77d 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -1402,6 +1402,11 @@ struct btrfs_fs_info { */ u64 last_trans_log_full_commit; unsigned long mount_opt; + /* + * Track requests for actions that need to be done during transaction + * commit (like for some mount options). + */ + unsigned long pending_changes; unsigned long compress_type:4; int commit_interval; /* @@ -2103,6 +2108,7 @@ struct btrfs_ioctl_defrag_range_args { #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt) #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \ BTRFS_MOUNT_##opt) + #define btrfs_set_and_info(root, opt, fmt, args...) \ { \ if (!btrfs_test_opt(root, opt)) \ @@ -2118,6 +2124,45 @@ struct btrfs_ioctl_defrag_range_args { } /* + * Requests for changes that need to be done during transaction commit. + * + * Internal mount options that are used for special handling of the real + * mount options (eg. cannot be set during remount and have to be set during + * transaction commit) + */ + +#define btrfs_test_pending(info, opt) \ + test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) +#define btrfs_set_pending(info, opt) \ + set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) +#define btrfs_clear_pending(info, opt) \ + clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) + +/* + * Helpers for setting pending mount option changes. + * + * Expects corresponding macros + * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name + */ +#define btrfs_set_pending_and_info(info, opt, fmt, args...) \ +do { \ + if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \ + btrfs_info((info), fmt, ##args); \ + btrfs_set_pending((info), SET_##opt); \ + btrfs_clear_pending((info), CLEAR_##opt); \ + } \ +} while(0) + +#define btrfs_clear_pending_and_info(info, opt, fmt, args...) \ +do { \ + if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \ + btrfs_info((info), fmt, ##args); \ + btrfs_set_pending((info), CLEAR_##opt); \ + btrfs_clear_pending((info), SET_##opt); \ + } \ +} while(0) + +/* * Inode flags */ #define BTRFS_INODE_NODATASUM (1 << 0) diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index 1bf9f897065d..fd80c0d98421 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -2834,6 +2834,12 @@ retry_root_backup: if (btrfs_test_opt(tree_root, CHANGE_INODE_CACHE)) btrfs_set_opt(tree_root->fs_info->mount_opt, INODE_MAP_CACHE); + /* + * Mount does not set all options immediatelly, we can do it now and do + * not have to wait for transaction commit + */ + btrfs_apply_pending_changes(fs_info); + #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY if (btrfs_test_opt(tree_root, CHECK_INTEGRITY)) { ret = btrfsic_mount(tree_root, fs_devices, diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c index dcaae3616728..7a4024a55e5c 100644 --- a/fs/btrfs/transaction.c +++ b/fs/btrfs/transaction.c @@ -1850,6 +1850,8 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans, else btrfs_clear_opt(root->fs_info->mount_opt, INODE_MAP_CACHE); + btrfs_apply_pending_changes(root->fs_info); + /* commit_fs_roots gets rid of all the tree log roots, it is now * safe to free the root of tree log roots */ @@ -2019,3 +2021,17 @@ int btrfs_clean_one_deleted_snapshot(struct btrfs_root *root) return (ret < 0) ? 0 : 1; } + +void btrfs_apply_pending_changes(struct btrfs_fs_info *fs_info) +{ + unsigned long prev; + unsigned long bit; + + prev = cmpxchg(&fs_info->pending_changes, 0, 0); + if (!prev) + return; + + if (prev) + btrfs_warn(fs_info, + "unknown pending changes left 0x%lx, ignoring", prev); +} diff --git a/fs/btrfs/transaction.h b/fs/btrfs/transaction.h index d8f40e1a5d2d..75ebcfce9d57 100644 --- a/fs/btrfs/transaction.h +++ b/fs/btrfs/transaction.h @@ -170,4 +170,6 @@ int btrfs_wait_marked_extents(struct btrfs_root *root, int btrfs_transaction_blocked(struct btrfs_fs_info *info); int btrfs_transaction_in_commit(struct btrfs_fs_info *info); void btrfs_put_transaction(struct btrfs_transaction *transaction); +void btrfs_apply_pending_changes(struct btrfs_fs_info *fs_info); + #endif |