diff options
Diffstat (limited to 'fs/xfs/xfs_alloc.h')
| -rw-r--r-- | fs/xfs/xfs_alloc.h | 101 |
1 files changed, 61 insertions, 40 deletions
diff --git a/fs/xfs/xfs_alloc.h b/fs/xfs/xfs_alloc.h index 5aec15d0651..feacb061bab 100644 --- a/fs/xfs/xfs_alloc.h +++ b/fs/xfs/xfs_alloc.h @@ -19,23 +19,35 @@ #define __XFS_ALLOC_H__ struct xfs_buf; +struct xfs_btree_cur; struct xfs_mount; struct xfs_perag; struct xfs_trans; +extern struct workqueue_struct *xfs_alloc_wq; + /* * Freespace allocation types. Argument to xfs_alloc_[v]extent. */ -typedef enum xfs_alloctype -{ - XFS_ALLOCTYPE_ANY_AG, /* allocate anywhere, use rotor */ - XFS_ALLOCTYPE_FIRST_AG, /* ... start at ag 0 */ - XFS_ALLOCTYPE_START_AG, /* anywhere, start in this a.g. */ - XFS_ALLOCTYPE_THIS_AG, /* anywhere in this a.g. */ - XFS_ALLOCTYPE_START_BNO, /* near this block else anywhere */ - XFS_ALLOCTYPE_NEAR_BNO, /* in this a.g. and near this block */ - XFS_ALLOCTYPE_THIS_BNO /* at exactly this block */ -} xfs_alloctype_t; +#define XFS_ALLOCTYPE_ANY_AG 0x01 /* allocate anywhere, use rotor */ +#define XFS_ALLOCTYPE_FIRST_AG 0x02 /* ... start at ag 0 */ +#define XFS_ALLOCTYPE_START_AG 0x04 /* anywhere, start in this a.g. */ +#define XFS_ALLOCTYPE_THIS_AG 0x08 /* anywhere in this a.g. */ +#define XFS_ALLOCTYPE_START_BNO 0x10 /* near this block else anywhere */ +#define XFS_ALLOCTYPE_NEAR_BNO 0x20 /* in this a.g. and near this block */ +#define XFS_ALLOCTYPE_THIS_BNO 0x40 /* at exactly this block */ + +/* this should become an enum again when the tracing code is fixed */ +typedef unsigned int xfs_alloctype_t; + +#define XFS_ALLOC_TYPES \ + { XFS_ALLOCTYPE_ANY_AG, "ANY_AG" }, \ + { XFS_ALLOCTYPE_FIRST_AG, "FIRST_AG" }, \ + { XFS_ALLOCTYPE_START_AG, "START_AG" }, \ + { XFS_ALLOCTYPE_THIS_AG, "THIS_AG" }, \ + { XFS_ALLOCTYPE_START_BNO, "START_BNO" }, \ + { XFS_ALLOCTYPE_NEAR_BNO, "NEAR_BNO" }, \ + { XFS_ALLOCTYPE_THIS_BNO, "THIS_BNO" } /* * Flags for xfs_alloc_fix_freelist. @@ -64,6 +76,22 @@ typedef enum xfs_alloctype #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) + + +/* * Argument structure for xfs_alloc routines. * This is turned into a structure to avoid having 20 arguments passed * down several levels of the stack. @@ -100,26 +128,12 @@ typedef struct xfs_alloc_arg { #define XFS_ALLOC_USERDATA 1 /* allocation is for user data*/ #define XFS_ALLOC_INITIAL_USER_DATA 2 /* special case start of file */ - -#ifdef __KERNEL__ - -#if defined(XFS_ALLOC_TRACE) /* - * Allocation tracing buffer size. + * Find the length of the longest extent in an AG. */ -#define XFS_ALLOC_TRACE_SIZE 4096 -extern ktrace_t *xfs_alloc_trace_buf; - -/* - * Types for alloc tracing. - */ -#define XFS_ALLOC_KTRACE_ALLOC 1 -#define XFS_ALLOC_KTRACE_FREE 2 -#define XFS_ALLOC_KTRACE_MODAGF 3 -#define XFS_ALLOC_KTRACE_BUSY 4 -#define XFS_ALLOC_KTRACE_UNBUSY 5 -#define XFS_ALLOC_KTRACE_BUSYSEARCH 6 -#endif +xfs_extlen_t +xfs_alloc_longest_free_extent(struct xfs_mount *mp, + struct xfs_perag *pag); /* * Compute and fill in value of m_ag_maxlevels. @@ -196,18 +210,25 @@ xfs_free_extent( xfs_fsblock_t bno, /* starting block number of extent */ xfs_extlen_t len); /* length of extent */ -void -xfs_alloc_mark_busy(xfs_trans_t *tp, - xfs_agnumber_t agno, - xfs_agblock_t bno, - xfs_extlen_t len); +int /* error */ +xfs_alloc_lookup_le( + struct xfs_btree_cur *cur, /* btree cursor */ + xfs_agblock_t bno, /* starting block of extent */ + xfs_extlen_t len, /* length of extent */ + int *stat); /* success/failure */ -void -xfs_alloc_clear_busy(xfs_trans_t *tp, - xfs_agnumber_t ag, - int idx); - - -#endif /* __KERNEL__ */ +int /* error */ +xfs_alloc_lookup_ge( + struct xfs_btree_cur *cur, /* btree cursor */ + xfs_agblock_t bno, /* starting block of extent */ + xfs_extlen_t len, /* length of extent */ + int *stat); /* success/failure */ + +int /* error */ +xfs_alloc_get_rec( + struct xfs_btree_cur *cur, /* btree cursor */ + xfs_agblock_t *bno, /* output: starting block of extent */ + xfs_extlen_t *len, /* output: length of extent */ + int *stat); /* output: success/failure */ #endif /* __XFS_ALLOC_H__ */ |