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Diffstat (limited to 'fs/xfs/libxfs/xfs_alloc.h')
-rw-r--r--fs/xfs/libxfs/xfs_alloc.h52
1 files changed, 14 insertions, 38 deletions
diff --git a/fs/xfs/libxfs/xfs_alloc.h b/fs/xfs/libxfs/xfs_alloc.h
index cf268b2d0b6c..6fe2d6b7cfe9 100644
--- a/fs/xfs/libxfs/xfs_alloc.h
+++ b/fs/xfs/libxfs/xfs_alloc.h
@@ -54,41 +54,8 @@ typedef unsigned int xfs_alloctype_t;
*/
#define XFS_ALLOC_FLAG_TRYLOCK 0x00000001 /* use trylock for buffer locking */
#define XFS_ALLOC_FLAG_FREEING 0x00000002 /* indicate caller is freeing extents*/
-
-/*
- * In order to avoid ENOSPC-related deadlock caused by
- * out-of-order locking of AGF buffer (PV 947395), we place
- * constraints on the relationship among actual allocations for
- * data blocks, freelist blocks, and potential file data bmap
- * btree blocks. However, these restrictions may result in no
- * actual space allocated for a delayed extent, for example, a data
- * block in a certain AG is allocated but there is no additional
- * block for the additional bmap btree block due to a split of the
- * bmap btree of the file. The result of this may lead to an
- * infinite loop in xfssyncd when the file gets flushed to disk and
- * all delayed extents need to be actually allocated. To get around
- * this, we explicitly set aside a few blocks which will not be
- * reserved in delayed allocation. Considering the minimum number of
- * needed freelist blocks is 4 fsbs _per AG_, a potential split of file's bmap
- * btree requires 1 fsb, so we set the number of set-aside blocks
- * to 4 + 4*agcount.
- */
-#define XFS_ALLOC_SET_ASIDE(mp) (4 + ((mp)->m_sb.sb_agcount * 4))
-
-/*
- * When deciding how much space to allocate out of an AG, we limit the
- * allocation maximum size to the size the AG. However, we cannot use all the
- * blocks in the AG - some are permanently used by metadata. These
- * blocks are generally:
- * - the AG superblock, AGF, AGI and AGFL
- * - the AGF (bno and cnt) and AGI btree root blocks
- * - 4 blocks on the AGFL according to XFS_ALLOC_SET_ASIDE() limits
- *
- * The AG headers are sector sized, so the amount of space they take up is
- * dependent on filesystem geometry. The others are all single blocks.
- */
-#define XFS_ALLOC_AG_MAX_USABLE(mp) \
- ((mp)->m_sb.sb_agblocks - XFS_BB_TO_FSB(mp, XFS_FSS_TO_BB(mp, 4)) - 7)
+#define XFS_ALLOC_FLAG_NORMAP 0x00000004 /* don't modify the rmapbt */
+#define XFS_ALLOC_FLAG_NOSHRINK 0x00000008 /* don't shrink the freelist */
/*
@@ -123,6 +90,7 @@ typedef struct xfs_alloc_arg {
char isfl; /* set if is freelist blocks - !acctg */
char userdata; /* mask defining userdata treatment */
xfs_fsblock_t firstblock; /* io first block allocated */
+ struct xfs_owner_info oinfo; /* owner of blocks being allocated */
} xfs_alloc_arg_t;
/*
@@ -132,6 +100,11 @@ typedef struct xfs_alloc_arg {
#define XFS_ALLOC_INITIAL_USER_DATA (1 << 1)/* special case start of file */
#define XFS_ALLOC_USERDATA_ZERO (1 << 2)/* zero extent on allocation */
+/* freespace limit calculations */
+#define XFS_ALLOC_AGFL_RESERVE 4
+unsigned int xfs_alloc_set_aside(struct xfs_mount *mp);
+unsigned int xfs_alloc_ag_max_usable(struct xfs_mount *mp);
+
xfs_extlen_t xfs_alloc_longest_free_extent(struct xfs_mount *mp,
struct xfs_perag *pag, xfs_extlen_t need);
unsigned int xfs_alloc_min_freelist(struct xfs_mount *mp,
@@ -208,9 +181,10 @@ xfs_alloc_vextent(
*/
int /* error */
xfs_free_extent(
- struct xfs_trans *tp, /* transaction pointer */
- xfs_fsblock_t bno, /* starting block number of extent */
- xfs_extlen_t len); /* length of extent */
+ struct xfs_trans *tp, /* transaction pointer */
+ xfs_fsblock_t bno, /* starting block number of extent */
+ xfs_extlen_t len, /* length of extent */
+ struct xfs_owner_info *oinfo);/* extent owner */
int /* error */
xfs_alloc_lookup_ge(
@@ -232,4 +206,6 @@ int xfs_alloc_fix_freelist(struct xfs_alloc_arg *args, int flags);
int xfs_free_extent_fix_freelist(struct xfs_trans *tp, xfs_agnumber_t agno,
struct xfs_buf **agbp);
+xfs_extlen_t xfs_prealloc_blocks(struct xfs_mount *mp);
+
#endif /* __XFS_ALLOC_H__ */