diff options
Diffstat (limited to 'fs/xfs/libxfs/xfs_bmap_btree.c')
| -rw-r--r-- | fs/xfs/libxfs/xfs_bmap_btree.c | 250 |
1 files changed, 29 insertions, 221 deletions
diff --git a/fs/xfs/libxfs/xfs_bmap_btree.c b/fs/xfs/libxfs/xfs_bmap_btree.c index a6331ffa51e3..c10aecaaae44 100644 --- a/fs/xfs/libxfs/xfs_bmap_btree.c +++ b/fs/xfs/libxfs/xfs_bmap_btree.c @@ -38,22 +38,6 @@ #include "xfs_rmap.h" /* - * Determine the extent state. - */ -/* ARGSUSED */ -STATIC xfs_exntst_t -xfs_extent_state( - xfs_filblks_t blks, - int extent_flag) -{ - if (extent_flag) { - ASSERT(blks != 0); /* saved for DMIG */ - return XFS_EXT_UNWRITTEN; - } - return XFS_EXT_NORM; -} - -/* * Convert on-disk form of btree root to in-memory form. */ void @@ -87,84 +71,21 @@ xfs_bmdr_to_bmbt( memcpy(tpp, fpp, sizeof(*fpp) * dmxr); } -/* - * Convert a compressed bmap extent record to an uncompressed form. - * This code must be in sync with the routines xfs_bmbt_get_startoff, - * xfs_bmbt_get_startblock, xfs_bmbt_get_blockcount and xfs_bmbt_get_state. - */ -STATIC void -__xfs_bmbt_get_all( - uint64_t l0, - uint64_t l1, - xfs_bmbt_irec_t *s) -{ - int ext_flag; - xfs_exntst_t st; - - ext_flag = (int)(l0 >> (64 - BMBT_EXNTFLAG_BITLEN)); - s->br_startoff = ((xfs_fileoff_t)l0 & - xfs_mask64lo(64 - BMBT_EXNTFLAG_BITLEN)) >> 9; - s->br_startblock = (((xfs_fsblock_t)l0 & xfs_mask64lo(9)) << 43) | - (((xfs_fsblock_t)l1) >> 21); - s->br_blockcount = (xfs_filblks_t)(l1 & xfs_mask64lo(21)); - /* This is xfs_extent_state() in-line */ - if (ext_flag) { - ASSERT(s->br_blockcount != 0); /* saved for DMIG */ - st = XFS_EXT_UNWRITTEN; - } else - st = XFS_EXT_NORM; - s->br_state = st; -} - void -xfs_bmbt_get_all( - xfs_bmbt_rec_host_t *r, - xfs_bmbt_irec_t *s) -{ - __xfs_bmbt_get_all(r->l0, r->l1, s); -} - -/* - * Extract the blockcount field from an in memory bmap extent record. - */ -xfs_filblks_t -xfs_bmbt_get_blockcount( - xfs_bmbt_rec_host_t *r) -{ - return (xfs_filblks_t)(r->l1 & xfs_mask64lo(21)); -} - -/* - * Extract the startblock field from an in memory bmap extent record. - */ -xfs_fsblock_t -xfs_bmbt_get_startblock( - xfs_bmbt_rec_host_t *r) -{ - return (((xfs_fsblock_t)r->l0 & xfs_mask64lo(9)) << 43) | - (((xfs_fsblock_t)r->l1) >> 21); -} - -/* - * Extract the startoff field from an in memory bmap extent record. - */ -xfs_fileoff_t -xfs_bmbt_get_startoff( - xfs_bmbt_rec_host_t *r) -{ - return ((xfs_fileoff_t)r->l0 & - xfs_mask64lo(64 - BMBT_EXNTFLAG_BITLEN)) >> 9; -} - -xfs_exntst_t -xfs_bmbt_get_state( - xfs_bmbt_rec_host_t *r) -{ - int ext_flag; - - ext_flag = (int)((r->l0) >> (64 - BMBT_EXNTFLAG_BITLEN)); - return xfs_extent_state(xfs_bmbt_get_blockcount(r), - ext_flag); +xfs_bmbt_disk_get_all( + struct xfs_bmbt_rec *rec, + struct xfs_bmbt_irec *irec) +{ + uint64_t l0 = get_unaligned_be64(&rec->l0); + uint64_t l1 = get_unaligned_be64(&rec->l1); + + irec->br_startoff = (l0 & xfs_mask64lo(64 - BMBT_EXNTFLAG_BITLEN)) >> 9; + irec->br_startblock = ((l0 & xfs_mask64lo(9)) << 43) | (l1 >> 21); + irec->br_blockcount = l1 & xfs_mask64lo(21); + if (l0 >> (64 - BMBT_EXNTFLAG_BITLEN)) + irec->br_state = XFS_EXT_UNWRITTEN; + else + irec->br_state = XFS_EXT_NORM; } /* @@ -188,142 +109,29 @@ xfs_bmbt_disk_get_startoff( xfs_mask64lo(64 - BMBT_EXNTFLAG_BITLEN)) >> 9; } - -/* - * Set all the fields in a bmap extent record from the arguments. - */ -void -xfs_bmbt_set_allf( - xfs_bmbt_rec_host_t *r, - xfs_fileoff_t startoff, - xfs_fsblock_t startblock, - xfs_filblks_t blockcount, - xfs_exntst_t state) -{ - int extent_flag = (state == XFS_EXT_NORM) ? 0 : 1; - - ASSERT(state == XFS_EXT_NORM || state == XFS_EXT_UNWRITTEN); - ASSERT((startoff & xfs_mask64hi(64-BMBT_STARTOFF_BITLEN)) == 0); - ASSERT((blockcount & xfs_mask64hi(64-BMBT_BLOCKCOUNT_BITLEN)) == 0); - - ASSERT((startblock & xfs_mask64hi(64-BMBT_STARTBLOCK_BITLEN)) == 0); - - r->l0 = ((xfs_bmbt_rec_base_t)extent_flag << 63) | - ((xfs_bmbt_rec_base_t)startoff << 9) | - ((xfs_bmbt_rec_base_t)startblock >> 43); - r->l1 = ((xfs_bmbt_rec_base_t)startblock << 21) | - ((xfs_bmbt_rec_base_t)blockcount & - (xfs_bmbt_rec_base_t)xfs_mask64lo(21)); -} - /* * Set all the fields in a bmap extent record from the uncompressed form. */ void -xfs_bmbt_set_all( - xfs_bmbt_rec_host_t *r, - xfs_bmbt_irec_t *s) -{ - xfs_bmbt_set_allf(r, s->br_startoff, s->br_startblock, - s->br_blockcount, s->br_state); -} - - -/* - * Set all the fields in a disk format bmap extent record from the arguments. - */ -void -xfs_bmbt_disk_set_allf( - xfs_bmbt_rec_t *r, - xfs_fileoff_t startoff, - xfs_fsblock_t startblock, - xfs_filblks_t blockcount, - xfs_exntst_t state) -{ - int extent_flag = (state == XFS_EXT_NORM) ? 0 : 1; - - ASSERT(state == XFS_EXT_NORM || state == XFS_EXT_UNWRITTEN); - ASSERT((startoff & xfs_mask64hi(64-BMBT_STARTOFF_BITLEN)) == 0); - ASSERT((blockcount & xfs_mask64hi(64-BMBT_BLOCKCOUNT_BITLEN)) == 0); - ASSERT((startblock & xfs_mask64hi(64-BMBT_STARTBLOCK_BITLEN)) == 0); - - r->l0 = cpu_to_be64( - ((xfs_bmbt_rec_base_t)extent_flag << 63) | - ((xfs_bmbt_rec_base_t)startoff << 9) | - ((xfs_bmbt_rec_base_t)startblock >> 43)); - r->l1 = cpu_to_be64( - ((xfs_bmbt_rec_base_t)startblock << 21) | - ((xfs_bmbt_rec_base_t)blockcount & - (xfs_bmbt_rec_base_t)xfs_mask64lo(21))); -} - -/* - * Set all the fields in a bmap extent record from the uncompressed form. - */ -STATIC void xfs_bmbt_disk_set_all( - xfs_bmbt_rec_t *r, - xfs_bmbt_irec_t *s) -{ - xfs_bmbt_disk_set_allf(r, s->br_startoff, s->br_startblock, - s->br_blockcount, s->br_state); -} - -/* - * Set the blockcount field in a bmap extent record. - */ -void -xfs_bmbt_set_blockcount( - xfs_bmbt_rec_host_t *r, - xfs_filblks_t v) + struct xfs_bmbt_rec *r, + struct xfs_bmbt_irec *s) { - ASSERT((v & xfs_mask64hi(43)) == 0); - r->l1 = (r->l1 & (xfs_bmbt_rec_base_t)xfs_mask64hi(43)) | - (xfs_bmbt_rec_base_t)(v & xfs_mask64lo(21)); -} - -/* - * Set the startblock field in a bmap extent record. - */ -void -xfs_bmbt_set_startblock( - xfs_bmbt_rec_host_t *r, - xfs_fsblock_t v) -{ - ASSERT((v & xfs_mask64hi(12)) == 0); - r->l0 = (r->l0 & (xfs_bmbt_rec_base_t)xfs_mask64hi(55)) | - (xfs_bmbt_rec_base_t)(v >> 43); - r->l1 = (r->l1 & (xfs_bmbt_rec_base_t)xfs_mask64lo(21)) | - (xfs_bmbt_rec_base_t)(v << 21); -} + int extent_flag = (s->br_state != XFS_EXT_NORM); -/* - * Set the startoff field in a bmap extent record. - */ -void -xfs_bmbt_set_startoff( - xfs_bmbt_rec_host_t *r, - xfs_fileoff_t v) -{ - ASSERT((v & xfs_mask64hi(9)) == 0); - r->l0 = (r->l0 & (xfs_bmbt_rec_base_t) xfs_mask64hi(1)) | - ((xfs_bmbt_rec_base_t)v << 9) | - (r->l0 & (xfs_bmbt_rec_base_t)xfs_mask64lo(9)); -} + ASSERT(s->br_state == XFS_EXT_NORM || s->br_state == XFS_EXT_UNWRITTEN); + ASSERT(!(s->br_startoff & xfs_mask64hi(64-BMBT_STARTOFF_BITLEN))); + ASSERT(!(s->br_blockcount & xfs_mask64hi(64-BMBT_BLOCKCOUNT_BITLEN))); + ASSERT(!(s->br_startblock & xfs_mask64hi(64-BMBT_STARTBLOCK_BITLEN))); -/* - * Set the extent state field in a bmap extent record. - */ -void -xfs_bmbt_set_state( - xfs_bmbt_rec_host_t *r, - xfs_exntst_t v) -{ - ASSERT(v == XFS_EXT_NORM || v == XFS_EXT_UNWRITTEN); - if (v == XFS_EXT_NORM) - r->l0 &= xfs_mask64lo(64 - BMBT_EXNTFLAG_BITLEN); - else - r->l0 |= xfs_mask64hi(BMBT_EXNTFLAG_BITLEN); + put_unaligned_be64( + ((xfs_bmbt_rec_base_t)extent_flag << 63) | + ((xfs_bmbt_rec_base_t)s->br_startoff << 9) | + ((xfs_bmbt_rec_base_t)s->br_startblock >> 43), &r->l0); + put_unaligned_be64( + ((xfs_bmbt_rec_base_t)s->br_startblock << 21) | + ((xfs_bmbt_rec_base_t)s->br_blockcount & + (xfs_bmbt_rec_base_t)xfs_mask64lo(21)), &r->l1); } /* |