fs/btrfs/fs.c

   1 // SPDX-License-Identifier: GPL-2.0
   2
   3 #include "messages.h"
   4 #include "ctree.h"
   5 #include "fs.h"
   6 #include "accessors.h"
   7
   8 void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag,
   9                              const char *name)
  10 {
  11         struct btrfs_super_block *disk_super;
  12         u64 features;
  13
  14         disk_super = fs_info->super_copy;
  15         features = btrfs_super_incompat_flags(disk_super);
  16         if (!(features & flag)) {
  17                 spin_lock(&fs_info->super_lock);
  18                 features = btrfs_super_incompat_flags(disk_super);
  19                 if (!(features & flag)) {
  20                         features |= flag;
  21                         btrfs_set_super_incompat_flags(disk_super, features);
  22                         btrfs_info(fs_info,
  23                                 "setting incompat feature flag for %s (0x%llx)",
  24                                 name, flag);
  25                 }
  26                 spin_unlock(&fs_info->super_lock);
  27                 set_bit(BTRFS_FS_FEATURE_CHANGED, &fs_info->flags);
  28         }
  29 }
  30
  31 void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag,
  32                                const char *name)
  33 {
  34         struct btrfs_super_block *disk_super;
  35         u64 features;
  36
  37         disk_super = fs_info->super_copy;
  38         features = btrfs_super_incompat_flags(disk_super);
  39         if (features & flag) {
  40                 spin_lock(&fs_info->super_lock);
  41                 features = btrfs_super_incompat_flags(disk_super);
  42                 if (features & flag) {
  43                         features &= ~flag;
  44                         btrfs_set_super_incompat_flags(disk_super, features);
  45                         btrfs_info(fs_info,
  46                                 "clearing incompat feature flag for %s (0x%llx)",
  47                                 name, flag);
  48                 }
  49                 spin_unlock(&fs_info->super_lock);
  50                 set_bit(BTRFS_FS_FEATURE_CHANGED, &fs_info->flags);
  51         }
  52 }
  53
  54 void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag,
  55                               const char *name)
  56 {
  57         struct btrfs_super_block *disk_super;
  58         u64 features;
  59
  60         disk_super = fs_info->super_copy;
  61         features = btrfs_super_compat_ro_flags(disk_super);
  62         if (!(features & flag)) {
  63                 spin_lock(&fs_info->super_lock);
  64                 features = btrfs_super_compat_ro_flags(disk_super);
  65                 if (!(features & flag)) {
  66                         features |= flag;
  67                         btrfs_set_super_compat_ro_flags(disk_super, features);
  68                         btrfs_info(fs_info,
  69                                 "setting compat-ro feature flag for %s (0x%llx)",
  70                                 name, flag);
  71                 }
  72                 spin_unlock(&fs_info->super_lock);
  73                 set_bit(BTRFS_FS_FEATURE_CHANGED, &fs_info->flags);
  74         }
  75 }
  76
  77 void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag,
  78                                 const char *name)
  79 {
  80         struct btrfs_super_block *disk_super;
  81         u64 features;
  82
  83         disk_super = fs_info->super_copy;
  84         features = btrfs_super_compat_ro_flags(disk_super);
  85         if (features & flag) {
  86                 spin_lock(&fs_info->super_lock);
  87                 features = btrfs_super_compat_ro_flags(disk_super);
  88                 if (features & flag) {
  89                         features &= ~flag;
  90                         btrfs_set_super_compat_ro_flags(disk_super, features);
  91                         btrfs_info(fs_info,
  92                                 "clearing compat-ro feature flag for %s (0x%llx)",
  93                                 name, flag);
  94                 }
  95                 spin_unlock(&fs_info->super_lock);
  96                 set_bit(BTRFS_FS_FEATURE_CHANGED, &fs_info->flags);
  97         }
  98 }