From 253f4911f297b83745938b7f2c5649b94730b002 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Wed, 6 Apr 2016 09:19:55 +1000 Subject: xfs: better xfs_trans_alloc interface Merge xfs_trans_reserve and xfs_trans_alloc into a single function call that returns a transaction with all the required log and block reservations, and which allows passing transaction flags directly to avoid the cumbersome _xfs_trans_alloc interface. While we're at it we also get rid of the transaction type argument that has been superflous since we stopped supporting the non-CIL logging mode. The guts of it will be removed in another patch. [dchinner: fixed transaction leak in error path in xfs_setattr_nonsize] Signed-off-by: Christoph Hellwig Reviewed-by: Dave Chinner Signed-off-by: Dave Chinner --- fs/xfs/xfs_trans.c | 88 +++++++++++++++++++++++++----------------------------- 1 file changed, 41 insertions(+), 47 deletions(-) (limited to 'fs/xfs/xfs_trans.c') diff --git a/fs/xfs/xfs_trans.c b/fs/xfs/xfs_trans.c index 20c53666cb4b..b3669efb2a0a 100644 --- a/fs/xfs/xfs_trans.c +++ b/fs/xfs/xfs_trans.c @@ -46,47 +46,6 @@ xfs_trans_init( xfs_trans_resv_calc(mp, M_RES(mp)); } -/* - * This routine is called to allocate a transaction structure. - * The type parameter indicates the type of the transaction. These - * are enumerated in xfs_trans.h. - * - * Dynamically allocate the transaction structure from the transaction - * zone, initialize it, and return it to the caller. - */ -xfs_trans_t * -xfs_trans_alloc( - xfs_mount_t *mp, - uint type) -{ - xfs_trans_t *tp; - - sb_start_intwrite(mp->m_super); - tp = _xfs_trans_alloc(mp, type, KM_SLEEP); - tp->t_flags |= XFS_TRANS_FREEZE_PROT; - return tp; -} - -xfs_trans_t * -_xfs_trans_alloc( - xfs_mount_t *mp, - uint type, - xfs_km_flags_t memflags) -{ - xfs_trans_t *tp; - - WARN_ON(mp->m_super->s_writers.frozen == SB_FREEZE_COMPLETE); - atomic_inc(&mp->m_active_trans); - - tp = kmem_zone_zalloc(xfs_trans_zone, memflags); - tp->t_magic = XFS_TRANS_HEADER_MAGIC; - tp->t_type = type; - tp->t_mountp = mp; - INIT_LIST_HEAD(&tp->t_items); - INIT_LIST_HEAD(&tp->t_busy); - return tp; -} - /* * Free the transaction structure. If there is more clean up * to do when the structure is freed, add it here. @@ -99,7 +58,7 @@ xfs_trans_free( xfs_extent_busy_clear(tp->t_mountp, &tp->t_busy, false); atomic_dec(&tp->t_mountp->m_active_trans); - if (tp->t_flags & XFS_TRANS_FREEZE_PROT) + if (!(tp->t_flags & XFS_TRANS_NO_WRITECOUNT)) sb_end_intwrite(tp->t_mountp->m_super); xfs_trans_free_dqinfo(tp); kmem_zone_free(xfs_trans_zone, tp); @@ -125,7 +84,6 @@ xfs_trans_dup( * Initialize the new transaction structure. */ ntp->t_magic = XFS_TRANS_HEADER_MAGIC; - ntp->t_type = tp->t_type; ntp->t_mountp = tp->t_mountp; INIT_LIST_HEAD(&ntp->t_items); INIT_LIST_HEAD(&ntp->t_busy); @@ -135,9 +93,9 @@ xfs_trans_dup( ntp->t_flags = XFS_TRANS_PERM_LOG_RES | (tp->t_flags & XFS_TRANS_RESERVE) | - (tp->t_flags & XFS_TRANS_FREEZE_PROT); + (tp->t_flags & XFS_TRANS_NO_WRITECOUNT); /* We gave our writer reference to the new transaction */ - tp->t_flags &= ~XFS_TRANS_FREEZE_PROT; + tp->t_flags |= XFS_TRANS_NO_WRITECOUNT; ntp->t_ticket = xfs_log_ticket_get(tp->t_ticket); ntp->t_blk_res = tp->t_blk_res - tp->t_blk_res_used; tp->t_blk_res = tp->t_blk_res_used; @@ -165,7 +123,7 @@ xfs_trans_dup( * This does not do quota reservations. That typically is done by the * caller afterwards. */ -int +static int xfs_trans_reserve( struct xfs_trans *tp, struct xfs_trans_res *resp, @@ -219,7 +177,7 @@ xfs_trans_reserve( resp->tr_logres, resp->tr_logcount, &tp->t_ticket, XFS_TRANSACTION, - permanent, tp->t_type); + permanent, 0); } if (error) @@ -268,6 +226,42 @@ undo_blocks: return error; } +int +xfs_trans_alloc( + struct xfs_mount *mp, + struct xfs_trans_res *resp, + uint blocks, + uint rtextents, + uint flags, + struct xfs_trans **tpp) +{ + struct xfs_trans *tp; + int error; + + if (!(flags & XFS_TRANS_NO_WRITECOUNT)) + sb_start_intwrite(mp->m_super); + + WARN_ON(mp->m_super->s_writers.frozen == SB_FREEZE_COMPLETE); + atomic_inc(&mp->m_active_trans); + + tp = kmem_zone_zalloc(xfs_trans_zone, + (flags & XFS_TRANS_NOFS) ? KM_NOFS : KM_SLEEP); + tp->t_magic = XFS_TRANS_HEADER_MAGIC; + tp->t_flags = flags; + tp->t_mountp = mp; + INIT_LIST_HEAD(&tp->t_items); + INIT_LIST_HEAD(&tp->t_busy); + + error = xfs_trans_reserve(tp, resp, blocks, rtextents); + if (error) { + xfs_trans_cancel(tp); + return error; + } + + *tpp = tp; + return 0; +} + /* * Record the indicated change to the given field for application * to the file system's superblock when the transaction commits. -- cgit v1.2.3