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authorSteven Whitehouse <swhiteho@redhat.com>2012-02-24 15:09:14 +0000
committerSteven Whitehouse <swhiteho@redhat.com>2012-02-28 09:52:39 +0000
commita365fbf354907430e6852f0c373b4b3eeff81ba3 (patch)
tree65d5ed095e3150d6061860f5aefd150a5ab76cfd /fs/gfs2
parent9e73f571ea3afffca78c1f54128d57796e27532f (diff)
downloadop-kernel-dev-a365fbf354907430e6852f0c373b4b3eeff81ba3.zip
op-kernel-dev-a365fbf354907430e6852f0c373b4b3eeff81ba3.tar.gz
GFS2: Read resource groups on mount
This makes mount take slightly longer, but at the same time, the first write to the filesystem will be faster too. It also means that if there is a problem in the resource index, then we can refuse to mount rather than having to try and report that when the first write occurs. In addition, to avoid recursive locking, we hvae to take account of instances when the rindex glock may already be held when we are trying to update the rbtree of resource groups. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Diffstat (limited to 'fs/gfs2')
-rw-r--r--fs/gfs2/file.c5
-rw-r--r--fs/gfs2/inode.c14
-rw-r--r--fs/gfs2/ops_fstype.c5
-rw-r--r--fs/gfs2/rgrp.c13
4 files changed, 17 insertions, 20 deletions
diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c
index 7f906c8..c5fb359 100644
--- a/fs/gfs2/file.c
+++ b/fs/gfs2/file.c
@@ -772,11 +772,6 @@ static long gfs2_fallocate(struct file *file, int mode, loff_t offset,
if (bytes == 0)
bytes = sdp->sd_sb.sb_bsize;
- error = gfs2_rindex_update(sdp);
- if (error) {
- fs_warn(sdp, "rindex update returns %d\n", error);
- return error;
- }
gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &ip->i_gh);
error = gfs2_glock_nq(&ip->i_gh);
if (unlikely(error))
diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
index c87faf4..5698746 100644
--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -391,10 +391,6 @@ static int alloc_dinode(struct gfs2_inode *dip, u64 *no_addr, u64 *generation)
int error;
int dblocks = 1;
- error = gfs2_rindex_update(sdp);
- if (error)
- fs_warn(sdp, "rindex update returns %d\n", error);
-
error = gfs2_inplace_reserve(dip, RES_DINODE);
if (error)
goto out;
@@ -1035,19 +1031,15 @@ static int gfs2_unlink(struct inode *dir, struct dentry *dentry)
struct buffer_head *bh;
struct gfs2_holder ghs[3];
struct gfs2_rgrpd *rgd;
- int error;
+ int error = -EROFS;
- error = gfs2_rindex_update(sdp);
- if (error)
- return error;
gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1);
rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr);
- if (!rgd) {
- error = -EROFS;
+ if (!rgd)
goto out_inodes;
- }
+
gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, ghs + 2);
diff --git a/fs/gfs2/ops_fstype.c b/fs/gfs2/ops_fstype.c
index 6aacf3f..24f609c 100644
--- a/fs/gfs2/ops_fstype.c
+++ b/fs/gfs2/ops_fstype.c
@@ -800,6 +800,11 @@ static int init_inodes(struct gfs2_sbd *sdp, int undo)
fs_err(sdp, "can't get quota file inode: %d\n", error);
goto fail_rindex;
}
+
+ error = gfs2_rindex_update(sdp);
+ if (error)
+ goto fail_qinode;
+
return 0;
fail_qinode:
diff --git a/fs/gfs2/rgrp.c b/fs/gfs2/rgrp.c
index 981bfa3..49ada95 100644
--- a/fs/gfs2/rgrp.c
+++ b/fs/gfs2/rgrp.c
@@ -683,16 +683,21 @@ int gfs2_rindex_update(struct gfs2_sbd *sdp)
struct gfs2_glock *gl = ip->i_gl;
struct gfs2_holder ri_gh;
int error = 0;
+ int unlock_required = 0;
/* Read new copy from disk if we don't have the latest */
if (!sdp->sd_rindex_uptodate) {
mutex_lock(&sdp->sd_rindex_mutex);
- error = gfs2_glock_nq_init(gl, LM_ST_SHARED, 0, &ri_gh);
- if (error)
- return error;
+ if (!gfs2_glock_is_locked_by_me(gl)) {
+ error = gfs2_glock_nq_init(gl, LM_ST_SHARED, 0, &ri_gh);
+ if (error)
+ return error;
+ unlock_required = 1;
+ }
if (!sdp->sd_rindex_uptodate)
error = gfs2_ri_update(ip);
- gfs2_glock_dq_uninit(&ri_gh);
+ if (unlock_required)
+ gfs2_glock_dq_uninit(&ri_gh);
mutex_unlock(&sdp->sd_rindex_mutex);
}
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