From 8b56f083c2a6bd0a88271225f0bcf1d81db20d3c Mon Sep 17 00:00:00 2001 From: Nathan Scott Date: Thu, 28 Sep 2006 11:01:46 +1000 Subject: [PATCH] [XFS] Rework DMAPI bulkstat calls in such a way that we can directly extract inline attributes out of the bulkstat buffer (for that case), rather than using an (extremely expensive for large icount filesystems) iget for fetching attrs. SGI-PV: 944409 SGI-Modid: xfs-linux-melb:xfs-kern:26602a Signed-off-by: Nathan Scott Signed-off-by: Tim Shimmin --- fs/xfs/xfs_itable.c | 65 ++++++++++++++++++++++++++++++++++++++------- fs/xfs/xfs_itable.h | 11 ++++---- 2 files changed, 61 insertions(+), 15 deletions(-) diff --git a/fs/xfs/xfs_itable.c b/fs/xfs/xfs_itable.c index 7521f301ee58..305a9d0436f4 100644 --- a/fs/xfs/xfs_itable.c +++ b/fs/xfs/xfs_itable.c @@ -252,6 +252,46 @@ xfs_bulkstat_one( return error; } +/* + * Test to see whether we can use the ondisk inode directly, based + * on the given bulkstat flags, filling in dipp accordingly. + * Returns zero if the inode is dodgey. + */ +STATIC int +xfs_bulkstat_use_dinode( + xfs_mount_t *mp, + int flags, + xfs_buf_t *bp, + int clustidx, + xfs_dinode_t **dipp) +{ + xfs_dinode_t *dip; + unsigned int aformat; + + *dipp = NULL; + if (!bp || (flags & BULKSTAT_FG_IGET)) + return 1; + dip = (xfs_dinode_t *) + xfs_buf_offset(bp, clustidx << mp->m_sb.sb_inodelog); + if (INT_GET(dip->di_core.di_magic, ARCH_CONVERT) != XFS_DINODE_MAGIC || + !XFS_DINODE_GOOD_VERSION( + INT_GET(dip->di_core.di_version, ARCH_CONVERT))) + return 0; + if (flags & BULKSTAT_FG_QUICK) { + *dipp = dip; + return 1; + } + /* BULKSTAT_FG_INLINE: if attr fork is local, or not there, use it */ + aformat = INT_GET(dip->di_core.di_aformat, ARCH_CONVERT); + if ((XFS_CFORK_Q(&dip->di_core) == 0) || + (aformat == XFS_DINODE_FMT_LOCAL) || + (aformat == XFS_DINODE_FMT_EXTENTS && !dip->di_core.di_anextents)) { + *dipp = dip; + return 1; + } + return 1; +} + /* * Return stat information in bulk (by-inode) for the filesystem. */ @@ -529,7 +569,8 @@ xfs_bulkstat( ((chunkidx & nimask) >> mp->m_sb.sb_inopblog); - if (flags & BULKSTAT_FG_QUICK) { + if (flags & (BULKSTAT_FG_QUICK | + BULKSTAT_FG_INLINE)) { ino = XFS_AGINO_TO_INO(mp, agno, agino); bno = XFS_AGB_TO_DADDR(mp, agno, @@ -573,21 +614,25 @@ xfs_bulkstat( be32_add(&irbp->ir_freecount, 1); ino = XFS_AGINO_TO_INO(mp, agno, agino); bno = XFS_AGB_TO_DADDR(mp, agno, agbno); - if (flags & BULKSTAT_FG_QUICK) { - dip = (xfs_dinode_t *)xfs_buf_offset(bp, - (clustidx << mp->m_sb.sb_inodelog)); - - if (INT_GET(dip->di_core.di_magic, ARCH_CONVERT) - != XFS_DINODE_MAGIC - || !XFS_DINODE_GOOD_VERSION( - INT_GET(dip->di_core.di_version, ARCH_CONVERT))) - continue; + if (!xfs_bulkstat_use_dinode(mp, flags, bp, + clustidx, &dip)) + continue; + /* + * If we need to do an iget, cannot hold bp. + * Drop it, until starting the next cluster. + */ + if ((flags & BULKSTAT_FG_INLINE) && !dip) { + if (bp) + xfs_buf_relse(bp); + bp = NULL; } /* * Get the inode and fill in a single buffer. * BULKSTAT_FG_QUICK uses dip to fill it in. * BULKSTAT_FG_IGET uses igets. + * BULKSTAT_FG_INLINE uses dip if we have an + * inline attr fork, else igets. * See: xfs_bulkstat_one & xfs_dm_bulkstat_one. * This is also used to count inodes/blks, etc * in xfs_qm_quotacheck. diff --git a/fs/xfs/xfs_itable.h b/fs/xfs/xfs_itable.h index be5f12e07d22..6926c373a0a9 100644 --- a/fs/xfs/xfs_itable.h +++ b/fs/xfs/xfs_itable.h @@ -36,15 +36,16 @@ typedef int (*bulkstat_one_pf)(struct xfs_mount *mp, /* * Values for stat return value. */ -#define BULKSTAT_RV_NOTHING 0 -#define BULKSTAT_RV_DIDONE 1 -#define BULKSTAT_RV_GIVEUP 2 +#define BULKSTAT_RV_NOTHING 0 +#define BULKSTAT_RV_DIDONE 1 +#define BULKSTAT_RV_GIVEUP 2 /* * Values for bulkstat flag argument. */ -#define BULKSTAT_FG_IGET 0x1 /* Go through the buffer cache */ -#define BULKSTAT_FG_QUICK 0x2 /* No iget, walk the dinode cluster */ +#define BULKSTAT_FG_IGET 0x1 /* Go through the buffer cache */ +#define BULKSTAT_FG_QUICK 0x2 /* No iget, walk the dinode cluster */ +#define BULKSTAT_FG_INLINE 0x4 /* No iget if inline attrs */ /* * Return stat information in bulk (by-inode) for the filesystem. -- 2.20.1