From 1abfbcdf56d9485f050149bc4968c1609f9a0773 Mon Sep 17 00:00:00 2001 From: Omar Sandoval Date: Tue, 29 Sep 2015 20:50:32 -0700 Subject: [PATCH] Btrfs: add helpers for read-only compat bits We're finally going to add one of these for the free space tree, so let's add the same nice helpers that we have for the incompat bits. While we're add it, also add helpers to clear the bits. Reviewed-by: Josef Bacik Signed-off-by: Omar Sandoval Signed-off-by: Chris Mason --- fs/btrfs/ctree.h | 82 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 82 insertions(+) diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index 938efe33be80..42c41dc68cbb 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -4100,6 +4100,30 @@ static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info, } } +#define btrfs_clear_fs_incompat(__fs_info, opt) \ + __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt) + +static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info, + u64 flag) +{ + struct btrfs_super_block *disk_super; + u64 features; + + disk_super = fs_info->super_copy; + features = btrfs_super_incompat_flags(disk_super); + if (features & flag) { + spin_lock(&fs_info->super_lock); + features = btrfs_super_incompat_flags(disk_super); + if (features & flag) { + features &= ~flag; + btrfs_set_super_incompat_flags(disk_super, features); + btrfs_info(fs_info, "clearing %llu feature flag", + flag); + } + spin_unlock(&fs_info->super_lock); + } +} + #define btrfs_fs_incompat(fs_info, opt) \ __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt) @@ -4110,6 +4134,64 @@ static inline int __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag) return !!(btrfs_super_incompat_flags(disk_super) & flag); } +#define btrfs_set_fs_compat_ro(__fs_info, opt) \ + __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt) + +static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info, + u64 flag) +{ + struct btrfs_super_block *disk_super; + u64 features; + + disk_super = fs_info->super_copy; + features = btrfs_super_compat_ro_flags(disk_super); + if (!(features & flag)) { + spin_lock(&fs_info->super_lock); + features = btrfs_super_compat_ro_flags(disk_super); + if (!(features & flag)) { + features |= flag; + btrfs_set_super_compat_ro_flags(disk_super, features); + btrfs_info(fs_info, "setting %llu ro feature flag", + flag); + } + spin_unlock(&fs_info->super_lock); + } +} + +#define btrfs_clear_fs_compat_ro(__fs_info, opt) \ + __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt) + +static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info, + u64 flag) +{ + struct btrfs_super_block *disk_super; + u64 features; + + disk_super = fs_info->super_copy; + features = btrfs_super_compat_ro_flags(disk_super); + if (features & flag) { + spin_lock(&fs_info->super_lock); + features = btrfs_super_compat_ro_flags(disk_super); + if (features & flag) { + features &= ~flag; + btrfs_set_super_compat_ro_flags(disk_super, features); + btrfs_info(fs_info, "clearing %llu ro feature flag", + flag); + } + spin_unlock(&fs_info->super_lock); + } +} + +#define btrfs_fs_compat_ro(fs_info, opt) \ + __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt) + +static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag) +{ + struct btrfs_super_block *disk_super; + disk_super = fs_info->super_copy; + return !!(btrfs_super_compat_ro_flags(disk_super) & flag); +} + /* * Call btrfs_abort_transaction as early as possible when an error condition is * detected, that way the exact line number is reported.