From 36b21dde6e899d2f25077b7c239d2d6bcff17d73 Mon Sep 17 00:00:00 2001 From: Brian Foster Date: Fri, 20 Sep 2013 11:06:09 -0400 Subject: [PATCH] xfs: push down inactive transaction mgmt for remote symlinks Push down the transaction management for remote symlinks from xfs_inactive() down to xfs_inactive_symlink_rmt(). The latter is cleaned up to avoid transaction management intended for the calling context (i.e., trans duplication, reservation, item attachment). Signed-off-by: Brian Foster Reviewed-by: Dave Chinner Signed-off-by: Ben Myers --- fs/xfs/xfs_inode.c | 15 ++++---- fs/xfs/xfs_symlink.c | 86 +++++++++++++++++++++----------------------- fs/xfs/xfs_symlink.h | 2 +- 3 files changed, 49 insertions(+), 54 deletions(-) diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c index 5ac716b2df22..c26990b50941 100644 --- a/fs/xfs/xfs_inode.c +++ b/fs/xfs/xfs_inode.c @@ -1724,9 +1724,14 @@ xfs_inactive( if (error) return VN_INACTIVE_CACHE; + if (S_ISLNK(ip->i_d.di_mode)) { + error = xfs_inactive_symlink(ip); + if (error) + goto out; + } + tp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE); - resp = (truncate || S_ISLNK(ip->i_d.di_mode)) ? - &M_RES(mp)->tr_itruncate : &M_RES(mp)->tr_ifree; + resp = truncate ? &M_RES(mp)->tr_itruncate : &M_RES(mp)->tr_ifree; error = xfs_trans_reserve(tp, resp, 0, 0); if (error) { @@ -1738,11 +1743,7 @@ xfs_inactive( xfs_ilock(ip, XFS_ILOCK_EXCL); xfs_trans_ijoin(tp, ip, 0); - if (S_ISLNK(ip->i_d.di_mode)) { - error = xfs_inactive_symlink(ip, &tp); - if (error) - goto out_cancel; - } else if (truncate) { + if (truncate) { ip->i_d.di_size = 0; xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); diff --git a/fs/xfs/xfs_symlink.c b/fs/xfs/xfs_symlink.c index f622a97a7e33..ded282b10bc2 100644 --- a/fs/xfs/xfs_symlink.c +++ b/fs/xfs/xfs_symlink.c @@ -424,8 +424,7 @@ xfs_symlink( */ STATIC int xfs_inactive_symlink_rmt( - xfs_inode_t *ip, - xfs_trans_t **tpp) + struct xfs_inode *ip) { xfs_buf_t *bp; int committed; @@ -437,11 +436,9 @@ xfs_inactive_symlink_rmt( xfs_mount_t *mp; xfs_bmbt_irec_t mval[XFS_SYMLINK_MAPS]; int nmaps; - xfs_trans_t *ntp; int size; xfs_trans_t *tp; - tp = *tpp; mp = ip->i_mount; ASSERT(ip->i_df.if_flags & XFS_IFEXTENTS); /* @@ -453,6 +450,16 @@ xfs_inactive_symlink_rmt( */ ASSERT(ip->i_d.di_nextents > 0 && ip->i_d.di_nextents <= 2); + tp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE); + error = xfs_trans_reserve(tp, &M_RES(mp)->tr_itruncate, 0, 0); + if (error) { + xfs_trans_cancel(tp, 0); + return error; + } + + xfs_ilock(ip, XFS_ILOCK_EXCL); + xfs_trans_ijoin(tp, ip, 0); + /* * Lock the inode, fix the size, and join it to the transaction. * Hold it so in the normal path, we still have it locked for @@ -471,7 +478,7 @@ xfs_inactive_symlink_rmt( error = xfs_bmapi_read(ip, 0, xfs_symlink_blocks(mp, size), mval, &nmaps, 0); if (error) - goto error0; + goto error_trans_cancel; /* * Invalidate the block(s). No validation is done. */ @@ -481,22 +488,24 @@ xfs_inactive_symlink_rmt( XFS_FSB_TO_BB(mp, mval[i].br_blockcount), 0); if (!bp) { error = ENOMEM; - goto error1; + goto error_bmap_cancel; } xfs_trans_binval(tp, bp); } /* * Unmap the dead block(s) to the free_list. */ - if ((error = xfs_bunmapi(tp, ip, 0, size, XFS_BMAPI_METADATA, nmaps, - &first_block, &free_list, &done))) - goto error1; + error = xfs_bunmapi(tp, ip, 0, size, XFS_BMAPI_METADATA, nmaps, + &first_block, &free_list, &done); + if (error) + goto error_bmap_cancel; ASSERT(done); /* * Commit the first transaction. This logs the EFI and the inode. */ - if ((error = xfs_bmap_finish(&tp, &free_list, &committed))) - goto error1; + error = xfs_bmap_finish(&tp, &free_list, &committed); + if (error) + goto error_bmap_cancel; /* * The transaction must have been committed, since there were * actually extents freed by xfs_bunmapi. See xfs_bmap_finish. @@ -510,27 +519,14 @@ xfs_inactive_symlink_rmt( */ xfs_trans_ijoin(tp, ip, 0); xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); - /* - * Get a new, empty transaction to return to our caller. - */ - ntp = xfs_trans_dup(tp); /* * Commit the transaction containing extent freeing and EFDs. - * If we get an error on the commit here or on the reserve below, - * we need to unlock the inode since the new transaction doesn't - * have the inode attached. */ - error = xfs_trans_commit(tp, 0); - tp = ntp; + error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); if (error) { ASSERT(XFS_FORCED_SHUTDOWN(mp)); - goto error0; + goto error_unlock; } - /* - * transaction commit worked ok so we can drop the extra ticket - * reference that we gained in xfs_trans_dup() - */ - xfs_log_ticket_put(tp->t_ticket); /* * Remove the memory for extent descriptions (just bookkeeping). @@ -538,23 +534,16 @@ xfs_inactive_symlink_rmt( if (ip->i_df.if_bytes) xfs_idata_realloc(ip, -ip->i_df.if_bytes, XFS_DATA_FORK); ASSERT(ip->i_df.if_bytes == 0); - /* - * Put an itruncate log reservation in the new transaction - * for our caller. - */ - error = xfs_trans_reserve(tp, &M_RES(mp)->tr_itruncate, 0, 0); - if (error) { - ASSERT(XFS_FORCED_SHUTDOWN(mp)); - goto error0; - } - xfs_trans_ijoin(tp, ip, 0); - *tpp = tp; + xfs_iunlock(ip, XFS_ILOCK_EXCL); return 0; - error1: +error_bmap_cancel: xfs_bmap_cancel(&free_list); - error0: +error_trans_cancel: + xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); +error_unlock: + xfs_iunlock(ip, XFS_ILOCK_EXCL); return error; } @@ -563,41 +552,46 @@ xfs_inactive_symlink_rmt( */ int xfs_inactive_symlink( - struct xfs_inode *ip, - struct xfs_trans **tp) + struct xfs_inode *ip) { struct xfs_mount *mp = ip->i_mount; int pathlen; trace_xfs_inactive_symlink(ip); - ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); - if (XFS_FORCED_SHUTDOWN(mp)) return XFS_ERROR(EIO); + xfs_ilock(ip, XFS_ILOCK_EXCL); + /* * Zero length symlinks _can_ exist. */ pathlen = (int)ip->i_d.di_size; - if (!pathlen) + if (!pathlen) { + xfs_iunlock(ip, XFS_ILOCK_EXCL); return 0; + } if (pathlen < 0 || pathlen > MAXPATHLEN) { xfs_alert(mp, "%s: inode (0x%llx) bad symlink length (%d)", __func__, (unsigned long long)ip->i_ino, pathlen); + xfs_iunlock(ip, XFS_ILOCK_EXCL); ASSERT(0); return XFS_ERROR(EFSCORRUPTED); } if (ip->i_df.if_flags & XFS_IFINLINE) { - if (ip->i_df.if_bytes > 0) + if (ip->i_df.if_bytes > 0) xfs_idata_realloc(ip, -(ip->i_df.if_bytes), XFS_DATA_FORK); + xfs_iunlock(ip, XFS_ILOCK_EXCL); ASSERT(ip->i_df.if_bytes == 0); return 0; } + xfs_iunlock(ip, XFS_ILOCK_EXCL); + /* remove the remote symlink */ - return xfs_inactive_symlink_rmt(ip, tp); + return xfs_inactive_symlink_rmt(ip); } diff --git a/fs/xfs/xfs_symlink.h b/fs/xfs/xfs_symlink.h index 99338ba666ac..e75245d09116 100644 --- a/fs/xfs/xfs_symlink.h +++ b/fs/xfs/xfs_symlink.h @@ -22,6 +22,6 @@ int xfs_symlink(struct xfs_inode *dp, struct xfs_name *link_name, const char *target_path, umode_t mode, struct xfs_inode **ipp); int xfs_readlink(struct xfs_inode *ip, char *link); -int xfs_inactive_symlink(struct xfs_inode *ip, struct xfs_trans **tpp); +int xfs_inactive_symlink(struct xfs_inode *ip); #endif /* __XFS_SYMLINK_H */ -- 2.20.1