xfs: set up per-AG free space reservations

[cascardo/linux.git] / fs / xfs / xfs_mount.h

diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h
index c1b798c..a3c2e2d 100644 (file)
--- a/fs/xfs/xfs_mount.h
+++ b/fs/xfs/xfs_mount.h
@@ -116,9 +116,15 @@ typedef struct xfs_mount {
        uint                    m_bmap_dmnr[2]; /* min bmap btree records */
        uint                    m_inobt_mxr[2]; /* max inobt btree records */
        uint                    m_inobt_mnr[2]; /* min inobt btree records */
+       uint                    m_rmap_mxr[2];  /* max rmap btree records */
+       uint                    m_rmap_mnr[2];  /* min rmap btree records */
        uint                    m_ag_maxlevels; /* XFS_AG_MAXLEVELS */
        uint                    m_bm_maxlevels[2]; /* XFS_BM_MAXLEVELS */
        uint                    m_in_maxlevels; /* max inobt btree levels. */
+       uint                    m_rmap_maxlevels; /* max rmap btree levels */
+       xfs_extlen_t            m_ag_prealloc_blocks; /* reserved ag blocks */
+       uint                    m_alloc_set_aside; /* space we can't use */
+       uint                    m_ag_max_usable; /* max space per AG */
        struct radix_tree_root  m_perag_tree;   /* per-ag accounting info */
        spinlock_t              m_perag_lock;   /* lock for m_perag_tree */
        struct mutex            m_growlock;     /* growfs mutex */
@@ -319,6 +325,22 @@ 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.
@@ -366,8 +388,28 @@ 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);