diff options
Diffstat (limited to 'fs/xfs/xfs_fsops.c')
| -rw-r--r-- | fs/xfs/xfs_fsops.c | 42 |
1 files changed, 21 insertions, 21 deletions
diff --git a/fs/xfs/xfs_fsops.c b/fs/xfs/xfs_fsops.c index a13919a6a36..37a6f62c57b 100644 --- a/fs/xfs/xfs_fsops.c +++ b/fs/xfs/xfs_fsops.c @@ -167,27 +167,14 @@ xfs_growfs_data_private( } new = nb - mp->m_sb.sb_dblocks; oagcount = mp->m_sb.sb_agcount; - if (nagcount > oagcount) { - void *new_perag, *old_perag; - - xfs_filestream_flush(mp); - - new_perag = kmem_zalloc(sizeof(xfs_perag_t) * nagcount, - KM_MAYFAIL); - if (!new_perag) - return XFS_ERROR(ENOMEM); - - down_write(&mp->m_peraglock); - memcpy(new_perag, mp->m_perag, sizeof(xfs_perag_t) * oagcount); - old_perag = mp->m_perag; - mp->m_perag = new_perag; - - mp->m_flags |= XFS_MOUNT_32BITINODES; - nagimax = xfs_initialize_perag(mp, nagcount); - up_write(&mp->m_peraglock); - kmem_free(old_perag); + /* allocate the new per-ag structures */ + if (nagcount > oagcount) { + error = xfs_initialize_perag(mp, nagcount, &nagimax); + if (error) + return error; } + tp = xfs_trans_alloc(mp, XFS_TRANS_GROWFS); tp->t_flags |= XFS_TRANS_RESERVE; if ((error = xfs_trans_reserve(tp, XFS_GROWFS_SPACE_RES(mp), @@ -196,6 +183,11 @@ xfs_growfs_data_private( return error; } + /* + * Write new AG headers to disk. Non-transactional, but written + * synchronously so they are completed prior to the growfs transaction + * being logged. + */ nfree = 0; for (agno = nagcount - 1; agno >= oagcount; agno--, new -= agsize) { /* @@ -359,6 +351,12 @@ xfs_growfs_data_private( goto error0; } } + + /* + * Update changed superblock fields transactionally. These are not + * seen by the rest of the world until the transaction commit applies + * them atomically to the superblock. + */ if (nagcount > oagcount) xfs_trans_mod_sb(tp, XFS_TRANS_SB_AGCOUNT, nagcount - oagcount); if (nb > mp->m_sb.sb_dblocks) @@ -369,9 +367,9 @@ xfs_growfs_data_private( if (dpct) xfs_trans_mod_sb(tp, XFS_TRANS_SB_IMAXPCT, dpct); error = xfs_trans_commit(tp, 0); - if (error) { + if (error) return error; - } + /* New allocation groups fully initialized, so update mount struct */ if (nagimax) mp->m_maxagi = nagimax; @@ -381,6 +379,8 @@ xfs_growfs_data_private( mp->m_maxicount = icount << mp->m_sb.sb_inopblog; } else mp->m_maxicount = 0; + + /* update secondary superblocks. */ for (agno = 1; agno < nagcount; agno++) { error = xfs_read_buf(mp, mp->m_ddev_targp, XFS_AGB_TO_DADDR(mp, agno, XFS_SB_BLOCK(mp)), |