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authorSteven Whitehouse <swhiteho@redhat.com>2006-11-01 14:04:17 -0500
committerSteven Whitehouse <swhiteho@redhat.com>2006-11-30 10:34:20 -0500
commit4f56110a00af5fb2e22fbccfcaf944d62cae8fcf (patch)
tree764e9b9e6b48637f6b3339496fa11e7047c37899 /fs/gfs2
parent2933f9254a6af33db25270778c998a42029da668 (diff)
[GFS2] Shrink gfs2_inode (5) - di_nlink
Remove the di_nlink field in favour of inode->i_nlink and update the nlink handling to use the proper macros. This saves 4 bytes. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Diffstat (limited to 'fs/gfs2')
-rw-r--r--fs/gfs2/inode.c37
-rw-r--r--fs/gfs2/ondisk.c3
-rw-r--r--fs/gfs2/ops_inode.c12
3 files changed, 31 insertions, 21 deletions
diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
index 0de9b22f454..71120398482 100644
--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -51,7 +51,6 @@ void gfs2_inode_attr_in(struct gfs2_inode *ip)
struct gfs2_dinode_host *di = &ip->i_di;
inode->i_ino = ip->i_num.no_addr;
- inode->i_nlink = di->di_nlink;
i_size_write(inode, di->di_size);
inode->i_atime.tv_sec = di->di_atime;
inode->i_mtime.tv_sec = di->di_mtime;
@@ -214,7 +213,12 @@ static int gfs2_dinode_in(struct gfs2_inode *ip, const void *buf)
ip->i_inode.i_uid = be32_to_cpu(str->di_uid);
ip->i_inode.i_gid = be32_to_cpu(str->di_gid);
- di->di_nlink = be32_to_cpu(str->di_nlink);
+ /*
+ * We will need to review setting the nlink count here in the
+ * light of the forthcoming ro bind mount work. This is a reminder
+ * to do that.
+ */
+ ip->i_inode.i_nlink = be32_to_cpu(str->di_nlink);
di->di_size = be64_to_cpu(str->di_size);
di->di_blocks = be64_to_cpu(str->di_blocks);
di->di_atime = be64_to_cpu(str->di_atime);
@@ -336,12 +340,12 @@ int gfs2_change_nlink(struct gfs2_inode *ip, int diff)
u32 nlink;
int error;
- BUG_ON(ip->i_di.di_nlink != ip->i_inode.i_nlink);
- nlink = ip->i_di.di_nlink + diff;
+ BUG_ON(diff != 1 && diff != -1);
+ nlink = ip->i_inode.i_nlink + diff;
/* If we are reducing the nlink count, but the new value ends up being
bigger than the old one, we must have underflowed. */
- if (diff < 0 && nlink > ip->i_di.di_nlink) {
+ if (diff < 0 && nlink > ip->i_inode.i_nlink) {
if (gfs2_consist_inode(ip))
gfs2_dinode_print(ip);
return -EIO;
@@ -351,16 +355,19 @@ int gfs2_change_nlink(struct gfs2_inode *ip, int diff)
if (error)
return error;
- ip->i_di.di_nlink = nlink;
+ if (diff > 0)
+ inc_nlink(&ip->i_inode);
+ else
+ drop_nlink(&ip->i_inode);
+
ip->i_di.di_ctime = get_seconds();
- ip->i_inode.i_nlink = nlink;
gfs2_trans_add_bh(ip->i_gl, dibh, 1);
gfs2_dinode_out(ip, dibh->b_data);
brelse(dibh);
mark_inode_dirty(&ip->i_inode);
- if (ip->i_di.di_nlink == 0) {
+ if (ip->i_inode.i_nlink == 0) {
struct gfs2_rgrpd *rgd;
struct gfs2_holder ri_gh, rg_gh;
@@ -375,7 +382,6 @@ int gfs2_change_nlink(struct gfs2_inode *ip, int diff)
if (error)
goto out_norgrp;
- clear_nlink(&ip->i_inode);
gfs2_unlink_di(&ip->i_inode); /* mark inode unlinked */
gfs2_glock_dq_uninit(&rg_gh);
out_norgrp:
@@ -586,7 +592,7 @@ static int create_ok(struct gfs2_inode *dip, const struct qstr *name,
return error;
/* Don't create entries in an unlinked directory */
- if (!dip->i_di.di_nlink)
+ if (!dip->i_inode.i_nlink)
return -EPERM;
error = gfs2_dir_search(&dip->i_inode, name, NULL, NULL);
@@ -602,7 +608,7 @@ static int create_ok(struct gfs2_inode *dip, const struct qstr *name,
if (dip->i_di.di_entries == (u32)-1)
return -EFBIG;
- if (S_ISDIR(mode) && dip->i_di.di_nlink == (u32)-1)
+ if (S_ISDIR(mode) && dip->i_inode.i_nlink == (u32)-1)
return -EMLINK;
return 0;
@@ -808,7 +814,7 @@ static int link_dinode(struct gfs2_inode *dip, const struct qstr *name,
error = gfs2_meta_inode_buffer(ip, &dibh);
if (error)
goto fail_end_trans;
- ip->i_di.di_nlink = 1;
+ ip->i_inode.i_nlink = 1;
gfs2_trans_add_bh(ip->i_gl, dibh, 1);
gfs2_dinode_out(ip, dibh->b_data);
brelse(dibh);
@@ -1016,7 +1022,12 @@ int gfs2_rmdiri(struct gfs2_inode *dip, const struct qstr *name,
if (error)
return error;
- error = gfs2_change_nlink(ip, -2);
+ /* It looks odd, but it really should be done twice */
+ error = gfs2_change_nlink(ip, -1);
+ if (error)
+ return error;
+
+ error = gfs2_change_nlink(ip, -1);
if (error)
return error;
diff --git a/fs/gfs2/ondisk.c b/fs/gfs2/ondisk.c
index e224f6a2264..b4e354b1881 100644
--- a/fs/gfs2/ondisk.c
+++ b/fs/gfs2/ondisk.c
@@ -164,7 +164,7 @@ void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf)
str->di_mode = cpu_to_be32(ip->i_inode.i_mode);
str->di_uid = cpu_to_be32(ip->i_inode.i_uid);
str->di_gid = cpu_to_be32(ip->i_inode.i_gid);
- str->di_nlink = cpu_to_be32(di->di_nlink);
+ str->di_nlink = cpu_to_be32(ip->i_inode.i_nlink);
str->di_size = cpu_to_be64(di->di_size);
str->di_blocks = cpu_to_be64(di->di_blocks);
str->di_atime = cpu_to_be64(di->di_atime);
@@ -191,7 +191,6 @@ void gfs2_dinode_print(const struct gfs2_inode *ip)
gfs2_inum_print(&ip->i_num);
- pv(di, di_nlink, "%u");
printk(KERN_INFO " di_size = %llu\n", (unsigned long long)di->di_size);
printk(KERN_INFO " di_blocks = %llu\n", (unsigned long long)di->di_blocks);
printk(KERN_INFO " di_atime = %lld\n", (long long)di->di_atime);
diff --git a/fs/gfs2/ops_inode.c b/fs/gfs2/ops_inode.c
index efbcec3311b..06176dee155 100644
--- a/fs/gfs2/ops_inode.c
+++ b/fs/gfs2/ops_inode.c
@@ -169,7 +169,7 @@ static int gfs2_link(struct dentry *old_dentry, struct inode *dir,
}
error = -EINVAL;
- if (!dip->i_di.di_nlink)
+ if (!dip->i_inode.i_nlink)
goto out_gunlock;
error = -EFBIG;
if (dip->i_di.di_entries == (u32)-1)
@@ -178,10 +178,10 @@ static int gfs2_link(struct dentry *old_dentry, struct inode *dir,
if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
goto out_gunlock;
error = -EINVAL;
- if (!ip->i_di.di_nlink)
+ if (!ip->i_inode.i_nlink)
goto out_gunlock;
error = -EMLINK;
- if (ip->i_di.di_nlink == (u32)-1)
+ if (ip->i_inode.i_nlink == (u32)-1)
goto out_gunlock;
alloc_required = error = gfs2_diradd_alloc_required(dir, &dentry->d_name);
@@ -386,7 +386,7 @@ static int gfs2_mkdir(struct inode *dir, struct dentry *dentry, int mode)
ip = ghs[1].gh_gl->gl_object;
- ip->i_di.di_nlink = 2;
+ ip->i_inode.i_nlink = 2;
ip->i_di.di_size = sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode);
ip->i_di.di_flags |= GFS2_DIF_JDATA;
ip->i_di.di_payload_format = GFS2_FORMAT_DE;
@@ -636,7 +636,7 @@ static int gfs2_rename(struct inode *odir, struct dentry *odentry,
};
if (odip != ndip) {
- if (!ndip->i_di.di_nlink) {
+ if (!ndip->i_inode.i_nlink) {
error = -EINVAL;
goto out_gunlock;
}
@@ -645,7 +645,7 @@ static int gfs2_rename(struct inode *odir, struct dentry *odentry,
goto out_gunlock;
}
if (S_ISDIR(ip->i_inode.i_mode) &&
- ndip->i_di.di_nlink == (u32)-1) {
+ ndip->i_inode.i_nlink == (u32)-1) {
error = -EMLINK;
goto out_gunlock;
}