From af5c269799feaef110e59ce55b497cdd08712b0c Mon Sep 17 00:00:00 2001 From: Steven Whitehouse Date: Fri, 27 Sep 2013 12:49:33 +0100 Subject: [PATCH] GFS2: Clean up reservation removal The reservation for an inode should be cleared when it is truncated so that we can start again at a different offset for future allocations. We could try and do better than that, by resetting the search based on where the truncation started from, but this is only a first step. In addition, there are three callers of gfs2_rs_delete() but only one of those should really be testing the value of i_writecount. While we get away with that in the other cases currently, I think it would be better if we made that test specific to the one case which requires it. Signed-off-by: Steven Whitehouse --- fs/gfs2/bmap.c | 4 +++- fs/gfs2/file.c | 2 +- fs/gfs2/inode.c | 2 +- fs/gfs2/rgrp.c | 7 +++---- fs/gfs2/rgrp.h | 2 +- fs/gfs2/super.c | 2 +- 6 files changed, 10 insertions(+), 9 deletions(-) diff --git a/fs/gfs2/bmap.c b/fs/gfs2/bmap.c index 62a65fc448dc..21ad0f11cad4 100644 --- a/fs/gfs2/bmap.c +++ b/fs/gfs2/bmap.c @@ -1279,6 +1279,7 @@ do_grow_qunlock: int gfs2_setattr_size(struct inode *inode, u64 newsize) { + struct gfs2_inode *ip = GFS2_I(inode); int ret; u64 oldsize; @@ -1294,7 +1295,7 @@ int gfs2_setattr_size(struct inode *inode, u64 newsize) inode_dio_wait(inode); - ret = gfs2_rs_alloc(GFS2_I(inode)); + ret = gfs2_rs_alloc(ip); if (ret) goto out; @@ -1304,6 +1305,7 @@ int gfs2_setattr_size(struct inode *inode, u64 newsize) goto out; } + gfs2_rs_deltree(ip->i_res); ret = do_shrink(inode, oldsize, newsize); out: put_write_access(inode); diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c index 0621b46d474d..9ad20edc9c27 100644 --- a/fs/gfs2/file.c +++ b/fs/gfs2/file.c @@ -620,7 +620,7 @@ static int gfs2_release(struct inode *inode, struct file *file) if (!(file->f_mode & FMODE_WRITE)) return 0; - gfs2_rs_delete(ip); + gfs2_rs_delete(ip, &inode->i_writecount); return 0; } diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c index cd58611912f5..4b79c19100d2 100644 --- a/fs/gfs2/inode.c +++ b/fs/gfs2/inode.c @@ -711,7 +711,7 @@ fail_gunlock2: fail_free_inode: if (ip->i_gl) gfs2_glock_put(ip->i_gl); - gfs2_rs_delete(ip); + gfs2_rs_delete(ip, NULL); free_inode_nonrcu(inode); inode = NULL; fail_gunlock: diff --git a/fs/gfs2/rgrp.c b/fs/gfs2/rgrp.c index 285dd363199a..d4d10fadab79 100644 --- a/fs/gfs2/rgrp.c +++ b/fs/gfs2/rgrp.c @@ -661,14 +661,13 @@ void gfs2_rs_deltree(struct gfs2_blkreserv *rs) /** * gfs2_rs_delete - delete a multi-block reservation * @ip: The inode for this reservation + * @wcount: The inode's write count, or NULL * */ -void gfs2_rs_delete(struct gfs2_inode *ip) +void gfs2_rs_delete(struct gfs2_inode *ip, atomic_t *wcount) { - struct inode *inode = &ip->i_inode; - down_write(&ip->i_rw_mutex); - if (ip->i_res && atomic_read(&inode->i_writecount) <= 1) { + if (ip->i_res && ((wcount == NULL) || (atomic_read(wcount) <= 1))) { gfs2_rs_deltree(ip->i_res); BUG_ON(ip->i_res->rs_free); kmem_cache_free(gfs2_rsrv_cachep, ip->i_res); diff --git a/fs/gfs2/rgrp.h b/fs/gfs2/rgrp.h index 5b3f4a896e6c..57ea16ba3414 100644 --- a/fs/gfs2/rgrp.h +++ b/fs/gfs2/rgrp.h @@ -48,7 +48,7 @@ extern int gfs2_alloc_blocks(struct gfs2_inode *ip, u64 *bn, unsigned int *n, extern int gfs2_rs_alloc(struct gfs2_inode *ip); extern void gfs2_rs_deltree(struct gfs2_blkreserv *rs); -extern void gfs2_rs_delete(struct gfs2_inode *ip); +extern void gfs2_rs_delete(struct gfs2_inode *ip, atomic_t *wcount); extern void __gfs2_free_blocks(struct gfs2_inode *ip, u64 bstart, u32 blen, int meta); extern void gfs2_free_meta(struct gfs2_inode *ip, u64 bstart, u32 blen); extern void gfs2_free_di(struct gfs2_rgrpd *rgd, struct gfs2_inode *ip); diff --git a/fs/gfs2/super.c b/fs/gfs2/super.c index e5639dec66c4..35da5b19c0de 100644 --- a/fs/gfs2/super.c +++ b/fs/gfs2/super.c @@ -1526,7 +1526,7 @@ out_unlock: out: /* Case 3 starts here */ truncate_inode_pages(&inode->i_data, 0); - gfs2_rs_delete(ip); + gfs2_rs_delete(ip, NULL); gfs2_ordered_del_inode(ip); clear_inode(inode); gfs2_dir_hash_inval(ip); -- 2.20.1