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authorDave Chinner <david@fromorbit.com>2016-10-03 09:52:31 +1100
committerDave Chinner <david@fromorbit.com>2016-10-03 09:52:31 +1100
commit79ad57612495744d3875a6fba25c467a87b3ad64 (patch)
tree34532ea5817090e1b650da0c67135d169e7c5e16 /fs/xfs/xfs_mount.h
parentb036b97050a9799aaaee78a8501aa255a74a2db7 (diff)
parent3fd129b63fd062a0d8f5d55994a6e98896c20fa7 (diff)
downloadlinux-79ad57612495744d3875a6fba25c467a87b3ad64.tar.bz2
Merge branch 'xfs-4.9-reflink-prep' into for-next
Diffstat (limited to 'fs/xfs/xfs_mount.h')
-rw-r--r--fs/xfs/xfs_mount.h36
1 files changed, 36 insertions, 0 deletions
diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h
index efd4a5526f37..041d9493e798 100644
--- a/fs/xfs/xfs_mount.h
+++ b/fs/xfs/xfs_mount.h
@@ -331,6 +331,22 @@ xfs_mp_fail_writes(struct xfs_mount *mp)
}
#endif
+/* per-AG block reservation data structures*/
+enum xfs_ag_resv_type {
+ XFS_AG_RESV_NONE = 0,
+ XFS_AG_RESV_METADATA,
+ XFS_AG_RESV_AGFL,
+};
+
+struct xfs_ag_resv {
+ /* number of blocks originally reserved here */
+ xfs_extlen_t ar_orig_reserved;
+ /* number of blocks reserved here */
+ xfs_extlen_t ar_reserved;
+ /* number of blocks originally asked for */
+ xfs_extlen_t ar_asked;
+};
+
/*
* Per-ag incore structure, copies of information in agf and agi, to improve the
* performance of allocation group selection.
@@ -378,8 +394,28 @@ typedef struct xfs_perag {
/* for rcu-safe freeing */
struct rcu_head rcu_head;
int pagb_count; /* pagb slots in use */
+
+ /* Blocks reserved for all kinds of metadata. */
+ struct xfs_ag_resv pag_meta_resv;
+ /* Blocks reserved for just AGFL-based metadata. */
+ struct xfs_ag_resv pag_agfl_resv;
} xfs_perag_t;
+static inline struct xfs_ag_resv *
+xfs_perag_resv(
+ struct xfs_perag *pag,
+ enum xfs_ag_resv_type type)
+{
+ switch (type) {
+ case XFS_AG_RESV_METADATA:
+ return &pag->pag_meta_resv;
+ case XFS_AG_RESV_AGFL:
+ return &pag->pag_agfl_resv;
+ default:
+ return NULL;
+ }
+}
+
extern void xfs_uuid_table_free(void);
extern int xfs_log_sbcount(xfs_mount_t *);
extern __uint64_t xfs_default_resblks(xfs_mount_t *mp);