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[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>
This commit is contained in:
Steven Whitehouse 2006-11-01 14:04:17 -05:00
parent 2933f9254a
commit 4f56110a00
4 changed files with 31 additions and 22 deletions
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37
fs/gfs2/inode.c
View File

@ -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;

3
fs/gfs2/ondisk.c
View File

@ -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);

12
fs/gfs2/ops_inode.c
View File

@ -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;
}

1
include/linux/gfs2_ondisk.h
View File

@ -322,7 +322,6 @@ struct gfs2_dinode {
};
struct gfs2_dinode_host {
__u32 di_nlink; /* number of links to this file */
__u64 di_size; /* number of bytes in file */
__u64 di_blocks; /* number of blocks in file */
__u64 di_atime; /* time last accessed */