diff options
Diffstat (limited to 'fs/xfs/xfs_inode.c')
| -rw-r--r-- | fs/xfs/xfs_inode.c | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c index 19a868a1ffd0..45cfde935f73 100644 --- a/fs/xfs/xfs_inode.c +++ b/fs/xfs/xfs_inode.c @@ -1786,6 +1786,60 @@ xfs_inactive_ifree( } /* + * Play some accounting tricks with deferred inactivation of unlinked inodes so + * that it looks like the inode got freed immediately. The superblock + * maintains counts of the number of inodes, data blocks, and rt blocks that + * would be freed if we were to force inode inactivation. These counts are + * added to the statfs free counters outside of the regular fdblocks/ifree + * counters. If userspace actually demands those "free" resources we'll force + * an inactivation scan to free things for real. + * + * Note that we can safely skip the block accounting trickery for complicated + * situations (inode with blocks on both devices, inode block counts that seem + * wrong) since the worst that happens is that statfs resource usage decreases + * more slowly. + * + * Positive @direction means we're setting up the accounting trick and + * negative undoes it. + */ +static inline void +xfs_inode_iadjust( + struct xfs_inode *ip, + int direction) +{ + struct xfs_mount *mp = ip->i_mount; + xfs_filblks_t iblocks; + int64_t inodes = 0; + int64_t dblocks = 0; + int64_t rblocks = 0; + + ASSERT(direction != 0); + + if (VFS_I(ip)->i_nlink == 0) { + inodes = 1; + + iblocks = max_t(int64_t, 0, ip->i_d.di_nblocks + + ip->i_delayed_blks); + if (!XFS_IS_REALTIME_INODE(ip)) + dblocks = iblocks; + else if (!XFS_IFORK_Q(ip) || + XFS_IFORK_FORMAT(ip, XFS_ATTR_FORK) == + XFS_DINODE_FMT_LOCAL) + rblocks = iblocks; + } + + if (direction < 0) { + inodes = -inodes; + dblocks = -dblocks; + rblocks = -rblocks; + } + + percpu_counter_add(&mp->m_iinactive, inodes); + percpu_counter_add(&mp->m_dinactive, dblocks); + percpu_counter_add(&mp->m_rinactive, rblocks); +} + +/* * Returns true if we need to update the on-disk metadata before we can free * the memory used by this inode. Updates include freeing post-eof * preallocations; freeing COW staging extents; and marking the inode free in |