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xfs: introduce xfs_sb.c for sharing with libxfs

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xfs_mount.c is shared with userspace, but the only functions that
are shared are to do with physical superblock manipulations. This
means that less than 25% of the xfs_mount.c code is actually shared
with userspace. Move all the superblock functions to xfs_sb.c and
share that instead with libxfs.

Note that this will leave all the in-core transaction related
superblock counter modifications in xfs_mount.c as none of that is
shared with userspace. With a few more small changes, xfs_mount.h
won't need to be shared with userspace anymore, either.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Mark Tinguely <tinguely@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
This commit is contained in:
Dave Chinner
2013-08-12 16:44:11 -05:00
committed by Ben Myers
parent 1fb7e48db6
commit ff55068c20
5 changed files with 863 additions and 797 deletions
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fs/xfs/Makefile
+2 -1
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@@ -47,6 +47,7 @@ xfs-y += xfs_aops.o \
xfs_iops.o \
xfs_itable.o \
xfs_message.o \
xfs_mount.o \
xfs_mru_cache.o \
xfs_rename.o \
xfs_super.o \
@@ -81,7 +82,7 @@ xfs-y += xfs_alloc.o \
xfs_inode_fork.o \
xfs_inode_buf.o \
xfs_log_recover.o \
xfs_mount.o \
xfs_sb.o \
xfs_symlink_remote.o \
xfs_trans_resv.o
fs/xfs/xfs_mount.c
+5 -779
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File diff suppressed because it is too large Load Diff
fs/xfs/xfs_mount.h
+2 -17
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@@ -291,14 +291,6 @@ xfs_daddr_to_agbno(struct xfs_mount *mp, xfs_daddr_t d)
return (xfs_agblock_t) do_div(ld, mp->m_sb.sb_agblocks);
}
/*
* perag get/put wrappers for ref counting
*/
struct xfs_perag *xfs_perag_get(struct xfs_mount *mp, xfs_agnumber_t agno);
struct xfs_perag *xfs_perag_get_tag(struct xfs_mount *mp, xfs_agnumber_t agno,
int tag);
void xfs_perag_put(struct xfs_perag *pag);
/*
* Per-cpu superblock locking functions
*/
@@ -331,6 +323,8 @@ typedef struct xfs_mod_sb {
extern int xfs_log_sbcount(xfs_mount_t *);
extern __uint64_t xfs_default_resblks(xfs_mount_t *mp);
extern int xfs_mountfs(xfs_mount_t *mp);
extern int xfs_initialize_perag(xfs_mount_t *mp, xfs_agnumber_t agcount,
xfs_agnumber_t *maxagi);
extern void xfs_unmountfs(xfs_mount_t *);
extern int xfs_mod_incore_sb(xfs_mount_t *, xfs_sb_field_t, int64_t, int);
@@ -349,13 +343,4 @@ extern void xfs_set_low_space_thresholds(struct xfs_mount *);
#endif /* __KERNEL__ */
extern void xfs_sb_calc_crc(struct xfs_buf *);
extern void xfs_mod_sb(struct xfs_trans *, __int64_t);
extern int xfs_initialize_perag(struct xfs_mount *, xfs_agnumber_t,
xfs_agnumber_t *);
extern void xfs_sb_from_disk(struct xfs_sb *, struct xfs_dsb *);
extern void xfs_sb_to_disk(struct xfs_dsb *, struct xfs_sb *, __int64_t);
extern const struct xfs_buf_ops xfs_sb_buf_ops;
#endif /* __XFS_MOUNT_H__ */
fs/xfs/xfs_sb.c
+834
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File diff suppressed because it is too large Load Diff
fs/xfs/xfs_sb.h
+20
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@@ -26,6 +26,7 @@
struct xfs_buf;
struct xfs_mount;
struct xfs_trans;
#define XFS_SB_MAGIC 0x58465342 /* 'XFSB' */
#define XFS_SB_VERSION_1 1 /* 5.3, 6.0.1, 6.1 */
@@ -674,4 +675,23 @@ xfs_is_quota_inode(struct xfs_sb *sbp, xfs_ino_t ino)
#define XFS_B_TO_FSBT(mp,b) (((__uint64_t)(b)) >> (mp)->m_sb.sb_blocklog)
#define XFS_B_FSB_OFFSET(mp,b) ((b) & (mp)->m_blockmask)
/*
* perag get/put wrappers for ref counting
*/
extern struct xfs_perag *xfs_perag_get(struct xfs_mount *, xfs_agnumber_t);
extern struct xfs_perag *xfs_perag_get_tag(struct xfs_mount *, xfs_agnumber_t,
int tag);
extern void xfs_perag_put(struct xfs_perag *pag);
extern int xfs_initialize_perag_data(struct xfs_mount *, xfs_agnumber_t);
extern void xfs_sb_calc_crc(struct xfs_buf *);
extern void xfs_mod_sb(struct xfs_trans *, __int64_t);
extern void xfs_sb_mount_common(struct xfs_mount *, struct xfs_sb *);
extern void xfs_sb_from_disk(struct xfs_sb *, struct xfs_dsb *);
extern void xfs_sb_to_disk(struct xfs_dsb *, struct xfs_sb *, __int64_t);
extern void xfs_sb_quota_from_disk(struct xfs_sb *sbp);
extern const struct xfs_buf_ops xfs_sb_buf_ops;
extern const struct xfs_buf_ops xfs_sb_quiet_buf_ops;
#endif /* __XFS_SB_H__ */