Update bcachefs sources to 5e392aed7a bcachefs: Kill bch2_alloc_write()

[bcachefs-tools-debian] / libbcachefs / super.h

diff --git a/libbcachefs/super.h b/libbcachefs/super.h
index a52ee3bb37ee3e80d3e8e1f3677d5c0f8bed1071..6d3efda26e6354fc45f515f3ed148b9d09da6e60 100644 (file)
--- a/libbcachefs/super.h
+++ b/libbcachefs/super.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _BCACHEFS_SUPER_H
 #define _BCACHEFS_SUPER_H
 
@@ -25,9 +26,34 @@ static inline sector_t bucket_remainder(const struct bch_dev *ca, sector_t s)
        return remainder;
 }
 
+static inline size_t sector_to_bucket_and_offset(const struct bch_dev *ca, sector_t s,
+                                                u32 *offset)
+{
+       return div_u64_rem(s, ca->mi.bucket_size, offset);
+}
+
 static inline bool bch2_dev_is_online(struct bch_dev *ca)
 {
-       return ca->disk_sb.bdev != NULL;
+       return !percpu_ref_is_zero(&ca->io_ref);
+}
+
+static inline bool bch2_dev_is_readable(struct bch_dev *ca)
+{
+       return bch2_dev_is_online(ca) &&
+               ca->mi.state != BCH_MEMBER_STATE_failed;
+}
+
+static inline bool bch2_dev_get_ioref(struct bch_dev *ca, int rw)
+{
+       if (!percpu_ref_tryget(&ca->io_ref))
+               return false;
+
+       if (ca->mi.state == BCH_MEMBER_STATE_rw ||
+           (ca->mi.state == BCH_MEMBER_STATE_ro && rw == READ))
+               return true;
+
+       percpu_ref_put(&ca->io_ref);
+       return false;
 }
 
 static inline unsigned dev_mask_nr(const struct bch_devs_mask *devs)
@@ -87,11 +113,8 @@ static inline struct bch_dev *__bch2_next_dev(struct bch_fs *c, unsigned *iter,
        return ca;
 }
 
-#define __for_each_member_device(ca, c, iter, mask)                    \
-       for ((iter) = 0; ((ca) = __bch2_next_dev((c), &(iter), mask)); (iter)++)
-
 #define for_each_member_device_rcu(ca, c, iter, mask)                  \
-       __for_each_member_device(ca, c, iter, mask)
+       for ((iter) = 0; ((ca) = __bch2_next_dev((c), &(iter), mask)); (iter)++)
 
 static inline struct bch_dev *bch2_get_next_dev(struct bch_fs *c, unsigned *iter)
 {
@@ -138,11 +161,11 @@ static inline struct bch_dev *bch2_get_next_online_dev(struct bch_fs *c,
        __for_each_online_member(ca, c, iter, ~0)
 
 #define for_each_rw_member(ca, c, iter)                                        \
-       __for_each_online_member(ca, c, iter, 1 << BCH_MEMBER_STATE_RW)
+       __for_each_online_member(ca, c, iter, 1 << BCH_MEMBER_STATE_rw)
 
 #define for_each_readable_member(ca, c, iter)                          \
        __for_each_online_member(ca, c, iter,                           \
-               (1 << BCH_MEMBER_STATE_RW)|(1 << BCH_MEMBER_STATE_RO))
+               (1 << BCH_MEMBER_STATE_rw)|(1 << BCH_MEMBER_STATE_ro))
 
 /*
  * If a key exists that references a device, the device won't be going away and
@@ -177,9 +200,29 @@ static inline struct bch_devs_mask bch2_online_devs(struct bch_fs *c)
        return devs;
 }
 
-struct bch_fs *bch2_bdev_to_fs(struct block_device *);
+static inline bool is_superblock_bucket(struct bch_dev *ca, u64 b)
+{
+       struct bch_sb_layout *layout = &ca->disk_sb.sb->layout;
+       u64 b_offset    = bucket_to_sector(ca, b);
+       u64 b_end       = bucket_to_sector(ca, b + 1);
+       unsigned i;
+
+       if (!b)
+               return true;
+
+       for (i = 0; i < layout->nr_superblocks; i++) {
+               u64 offset = le64_to_cpu(layout->sb_offset[i]);
+               u64 end = offset + (1 << layout->sb_max_size_bits);
+
+               if (!(offset >= b_end || end <= b_offset))
+                       return true;
+       }
+
+       return false;
+}
+
+struct bch_fs *bch2_dev_to_fs(dev_t);
 struct bch_fs *bch2_uuid_to_fs(uuid_le);
-int bch2_congested(void *, int);
 
 bool bch2_dev_state_allowed(struct bch_fs *, struct bch_dev *,
                           enum bch_member_state, int);
@@ -198,12 +241,24 @@ struct bch_dev *bch2_dev_lookup(struct bch_fs *, const char *);
 
 bool bch2_fs_emergency_read_only(struct bch_fs *);
 void bch2_fs_read_only(struct bch_fs *);
-const char *bch2_fs_read_write(struct bch_fs *);
 
+int bch2_fs_read_write(struct bch_fs *);
+int bch2_fs_read_write_early(struct bch_fs *);
+
+/*
+ * Only for use in the recovery/fsck path:
+ */
+static inline void bch2_fs_lazy_rw(struct bch_fs *c)
+{
+       if (percpu_ref_is_zero(&c->writes))
+               bch2_fs_read_write_early(c);
+}
+
+void __bch2_fs_stop(struct bch_fs *);
+void bch2_fs_free(struct bch_fs *);
 void bch2_fs_stop(struct bch_fs *);
 
-const char *bch2_fs_start(struct bch_fs *);
+int bch2_fs_start(struct bch_fs *);
 struct bch_fs *bch2_fs_open(char * const *, unsigned, struct bch_opts);
-const char *bch2_fs_open_incremental(const char *path);
 
 #endif /* _BCACHEFS_SUPER_H */