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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /fs/btrfs/space-info.h
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'fs/btrfs/space-info.h')
-rw-r--r--fs/btrfs/space-info.h163
1 files changed, 163 insertions, 0 deletions
diff --git a/fs/btrfs/space-info.h b/fs/btrfs/space-info.h
new file mode 100644
index 000000000..ce66023a9
--- /dev/null
+++ b/fs/btrfs/space-info.h
@@ -0,0 +1,163 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef BTRFS_SPACE_INFO_H
+#define BTRFS_SPACE_INFO_H
+
+#include "volumes.h"
+
+struct btrfs_space_info {
+ spinlock_t lock;
+
+ u64 total_bytes; /* total bytes in the space,
+ this doesn't take mirrors into account */
+ u64 bytes_used; /* total bytes used,
+ this doesn't take mirrors into account */
+ u64 bytes_pinned; /* total bytes pinned, will be freed when the
+ transaction finishes */
+ u64 bytes_reserved; /* total bytes the allocator has reserved for
+ current allocations */
+ u64 bytes_may_use; /* number of bytes that may be used for
+ delalloc/allocations */
+ u64 bytes_readonly; /* total bytes that are read only */
+ /* Total bytes in the space, but only accounts active block groups. */
+ u64 active_total_bytes;
+ u64 bytes_zone_unusable; /* total bytes that are unusable until
+ resetting the device zone */
+
+ u64 max_extent_size; /* This will hold the maximum extent size of
+ the space info if we had an ENOSPC in the
+ allocator. */
+ /* Chunk size in bytes */
+ u64 chunk_size;
+
+ /*
+ * Once a block group drops below this threshold (percents) we'll
+ * schedule it for reclaim.
+ */
+ int bg_reclaim_threshold;
+
+ int clamp; /* Used to scale our threshold for preemptive
+ flushing. The value is >> clamp, so turns
+ out to be a 2^clamp divisor. */
+
+ unsigned int full:1; /* indicates that we cannot allocate any more
+ chunks for this space */
+ unsigned int chunk_alloc:1; /* set if we are allocating a chunk */
+
+ unsigned int flush:1; /* set if we are trying to make space */
+
+ unsigned int force_alloc; /* set if we need to force a chunk
+ alloc for this space */
+
+ u64 disk_used; /* total bytes used on disk */
+ u64 disk_total; /* total bytes on disk, takes mirrors into
+ account */
+
+ u64 flags;
+
+ struct list_head list;
+ /* Protected by the spinlock 'lock'. */
+ struct list_head ro_bgs;
+ struct list_head priority_tickets;
+ struct list_head tickets;
+
+ /*
+ * Size of space that needs to be reclaimed in order to satisfy pending
+ * tickets
+ */
+ u64 reclaim_size;
+
+ /*
+ * tickets_id just indicates the next ticket will be handled, so note
+ * it's not stored per ticket.
+ */
+ u64 tickets_id;
+
+ struct rw_semaphore groups_sem;
+ /* for block groups in our same type */
+ struct list_head block_groups[BTRFS_NR_RAID_TYPES];
+
+ struct kobject kobj;
+ struct kobject *block_group_kobjs[BTRFS_NR_RAID_TYPES];
+};
+
+struct reserve_ticket {
+ u64 bytes;
+ int error;
+ bool steal;
+ struct list_head list;
+ wait_queue_head_t wait;
+};
+
+static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info)
+{
+ return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) &&
+ (space_info->flags & BTRFS_BLOCK_GROUP_DATA));
+}
+
+/*
+ *
+ * Declare a helper function to detect underflow of various space info members
+ */
+#define DECLARE_SPACE_INFO_UPDATE(name, trace_name) \
+static inline void \
+btrfs_space_info_update_##name(struct btrfs_fs_info *fs_info, \
+ struct btrfs_space_info *sinfo, \
+ s64 bytes) \
+{ \
+ const u64 abs_bytes = (bytes < 0) ? -bytes : bytes; \
+ lockdep_assert_held(&sinfo->lock); \
+ trace_update_##name(fs_info, sinfo, sinfo->name, bytes); \
+ trace_btrfs_space_reservation(fs_info, trace_name, \
+ sinfo->flags, abs_bytes, \
+ bytes > 0); \
+ if (bytes < 0 && sinfo->name < -bytes) { \
+ WARN_ON(1); \
+ sinfo->name = 0; \
+ return; \
+ } \
+ sinfo->name += bytes; \
+}
+
+DECLARE_SPACE_INFO_UPDATE(bytes_may_use, "space_info");
+DECLARE_SPACE_INFO_UPDATE(bytes_pinned, "pinned");
+
+int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
+void btrfs_add_bg_to_space_info(struct btrfs_fs_info *info,
+ struct btrfs_block_group *block_group);
+void btrfs_update_space_info_chunk_size(struct btrfs_space_info *space_info,
+ u64 chunk_size);
+struct btrfs_space_info *btrfs_find_space_info(struct btrfs_fs_info *info,
+ u64 flags);
+u64 __pure btrfs_space_info_used(struct btrfs_space_info *s_info,
+ bool may_use_included);
+void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
+void btrfs_dump_space_info(struct btrfs_fs_info *fs_info,
+ struct btrfs_space_info *info, u64 bytes,
+ int dump_block_groups);
+int btrfs_reserve_metadata_bytes(struct btrfs_fs_info *fs_info,
+ struct btrfs_block_rsv *block_rsv,
+ u64 orig_bytes,
+ enum btrfs_reserve_flush_enum flush);
+void btrfs_try_granting_tickets(struct btrfs_fs_info *fs_info,
+ struct btrfs_space_info *space_info);
+int btrfs_can_overcommit(struct btrfs_fs_info *fs_info,
+ struct btrfs_space_info *space_info, u64 bytes,
+ enum btrfs_reserve_flush_enum flush);
+
+static inline void btrfs_space_info_free_bytes_may_use(
+ struct btrfs_fs_info *fs_info,
+ struct btrfs_space_info *space_info,
+ u64 num_bytes)
+{
+ spin_lock(&space_info->lock);
+ btrfs_space_info_update_bytes_may_use(fs_info, space_info, -num_bytes);
+ btrfs_try_granting_tickets(fs_info, space_info);
+ spin_unlock(&space_info->lock);
+}
+int btrfs_reserve_data_bytes(struct btrfs_fs_info *fs_info, u64 bytes,
+ enum btrfs_reserve_flush_enum flush);
+void btrfs_dump_space_info_for_trans_abort(struct btrfs_fs_info *fs_info);
+void btrfs_init_async_reclaim_work(struct btrfs_fs_info *fs_info);
+
+#endif /* BTRFS_SPACE_INFO_H */