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Commit e7f14f4d authored by Steven Whitehouse's avatar Steven Whitehouse
Browse files

[GFS2] Shrink gfs2_inode (2) - di_major/di_minor 



This removes the device numbers from this structure by using
inode->i_rdev instead. It also cleans up the code in gfs2_mknod.
It results in shrinking the gfs2_inode by 8 bytes.

Signed-off-by: default avatarSteven Whitehouse <swhiteho@redhat.com>
parent af339c02

fs/gfs2/inode.c

+16 −20
Original line number Diff line number Diff line
@@ -51,17 +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;



	switch (di->di_mode & S_IFMT) {

	case S_IFBLK:

	case S_IFCHR:

		inode->i_rdev = MKDEV(di->di_major, di->di_minor);

		break;

	default:

		inode->i_rdev = 0;

		break;

	};



	inode->i_mode = di->di_mode;

	inode->i_nlink = di->di_nlink;

	inode->i_uid = di->di_uid;
@@ -222,6 +211,15 @@ static int gfs2_dinode_in(struct gfs2_inode *ip, const void *buf) 
		return -ESTALE;



	di->di_mode = be32_to_cpu(str->di_mode);

	ip->i_inode.i_rdev = 0;

	switch (di->di_mode & S_IFMT) {

	case S_IFBLK:

	case S_IFCHR:

		ip->i_inode.i_rdev = MKDEV(be32_to_cpu(str->di_major),

					   be32_to_cpu(str->di_minor));

		break;

	};



	di->di_uid = be32_to_cpu(str->di_uid);

	di->di_gid = be32_to_cpu(str->di_gid);

	di->di_nlink = be32_to_cpu(str->di_nlink);
@@ -230,8 +228,6 @@ static int gfs2_dinode_in(struct gfs2_inode *ip, const void *buf) 
	di->di_atime = be64_to_cpu(str->di_atime);

	di->di_mtime = be64_to_cpu(str->di_mtime);

	di->di_ctime = be64_to_cpu(str->di_ctime);

	di->di_major = be32_to_cpu(str->di_major);

	di->di_minor = be32_to_cpu(str->di_minor);



	di->di_goal_meta = be64_to_cpu(str->di_goal_meta);

	di->di_goal_data = be64_to_cpu(str->di_goal_data);
@@ -270,7 +266,6 @@ int gfs2_inode_refresh(struct gfs2_inode *ip) 
	}



	error = gfs2_dinode_in(ip, dibh->b_data);



	brelse(dibh);

	ip->i_vn = ip->i_gl->gl_vn;
@@ -684,7 +679,7 @@ static int alloc_dinode(struct gfs2_inode *dip, struct gfs2_inum_host *inum, 
static void init_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl,

			const struct gfs2_inum_host *inum, unsigned int mode,

			unsigned int uid, unsigned int gid,

			const u64 *generation)

			const u64 *generation, dev_t dev)

{

	struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);

	struct gfs2_dinode *di;
@@ -705,7 +700,8 @@ static void init_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl, 
	di->di_size = cpu_to_be64(0);

	di->di_blocks = cpu_to_be64(1);

	di->di_atime = di->di_mtime = di->di_ctime = cpu_to_be64(get_seconds());

	di->di_major = di->di_minor = cpu_to_be32(0);

	di->di_major = cpu_to_be32(MAJOR(dev));

	di->di_minor = cpu_to_be32(MINOR(dev));

	di->di_goal_meta = di->di_goal_data = cpu_to_be64(inum->no_addr);

	di->di_generation = cpu_to_be64(*generation);

	di->di_flags = cpu_to_be32(0);
@@ -740,7 +736,7 @@ static void init_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl, 


static int make_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl,

		       unsigned int mode, const struct gfs2_inum_host *inum,

		       const u64 *generation)

		       const u64 *generation, dev_t dev)

{

	struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);

	unsigned int uid, gid;
@@ -761,7 +757,7 @@ static int make_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl, 
	if (error)

		goto out_quota;



	init_dinode(dip, gl, inum, mode, uid, gid, generation);

	init_dinode(dip, gl, inum, mode, uid, gid, generation, dev);

	gfs2_quota_change(dip, +1, uid, gid);

	gfs2_trans_end(sdp);
@@ -892,7 +888,7 @@ static int gfs2_security_init(struct gfs2_inode *dip, struct gfs2_inode *ip) 
 */



struct inode *gfs2_createi(struct gfs2_holder *ghs, const struct qstr *name,

			   unsigned int mode)

			   unsigned int mode, dev_t dev)

{

	struct inode *inode;

	struct gfs2_inode *dip = ghs->gh_gl->gl_object;
@@ -950,7 +946,7 @@ struct inode *gfs2_createi(struct gfs2_holder *ghs, const struct qstr *name, 
			goto fail_gunlock;

	}



	error = make_dinode(dip, ghs[1].gh_gl, mode, &inum, &generation);

	error = make_dinode(dip, ghs[1].gh_gl, mode, &inum, &generation, dev);

	if (error)

		goto fail_gunlock2;

fs/gfs2/inode.h

+1 −1
Original line number Diff line number Diff line
@@ -37,7 +37,7 @@ int gfs2_change_nlink(struct gfs2_inode *ip, int diff); 
struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name,

			   int is_root, struct nameidata *nd);

struct inode *gfs2_createi(struct gfs2_holder *ghs, const struct qstr *name,

			   unsigned int mode);

			   unsigned int mode, dev_t dev);

int gfs2_rmdiri(struct gfs2_inode *dip, const struct qstr *name,

		struct gfs2_inode *ip);

int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name,

fs/gfs2/ondisk.c

+0 −4
Original line number Diff line number Diff line
@@ -170,8 +170,6 @@ void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf) 
	str->di_atime = cpu_to_be64(di->di_atime);

	str->di_mtime = cpu_to_be64(di->di_mtime);

	str->di_ctime = cpu_to_be64(di->di_ctime);

	str->di_major = cpu_to_be32(di->di_major);

	str->di_minor = cpu_to_be32(di->di_minor);



	str->di_goal_meta = cpu_to_be64(di->di_goal_meta);

	str->di_goal_data = cpu_to_be64(di->di_goal_data);
@@ -202,8 +200,6 @@ void gfs2_dinode_print(const struct gfs2_inode *ip) 
	printk(KERN_INFO "  di_atime = %lld\n", (long long)di->di_atime);

	printk(KERN_INFO "  di_mtime = %lld\n", (long long)di->di_mtime);

	printk(KERN_INFO "  di_ctime = %lld\n", (long long)di->di_ctime);

	pv(di, di_major, "%u");

	pv(di, di_minor, "%u");



	printk(KERN_INFO "  di_goal_meta = %llu\n", (unsigned long long)di->di_goal_meta);

	printk(KERN_INFO "  di_goal_data = %llu\n", (unsigned long long)di->di_goal_data);

fs/gfs2/ops_inode.c

+5 −33
Original line number Diff line number Diff line
@@ -59,7 +59,7 @@ static int gfs2_create(struct inode *dir, struct dentry *dentry, 
	gfs2_holder_init(dip->i_gl, 0, 0, ghs);



	for (;;) {

		inode = gfs2_createi(ghs, &dentry->d_name, S_IFREG | mode);

		inode = gfs2_createi(ghs, &dentry->d_name, S_IFREG | mode, 0);

		if (!IS_ERR(inode)) {

			gfs2_trans_end(sdp);

			if (dip->i_alloc.al_rgd)
@@ -326,7 +326,7 @@ static int gfs2_symlink(struct inode *dir, struct dentry *dentry, 


	gfs2_holder_init(dip->i_gl, 0, 0, ghs);



	inode = gfs2_createi(ghs, &dentry->d_name, S_IFLNK | S_IRWXUGO);

	inode = gfs2_createi(ghs, &dentry->d_name, S_IFLNK | S_IRWXUGO, 0);

	if (IS_ERR(inode)) {

		gfs2_holder_uninit(ghs);

		return PTR_ERR(inode);
@@ -379,7 +379,7 @@ static int gfs2_mkdir(struct inode *dir, struct dentry *dentry, int mode) 


	gfs2_holder_init(dip->i_gl, 0, 0, ghs);



	inode = gfs2_createi(ghs, &dentry->d_name, S_IFDIR | mode);

	inode = gfs2_createi(ghs, &dentry->d_name, S_IFDIR | mode, 0);

	if (IS_ERR(inode)) {

		gfs2_holder_uninit(ghs);

		return PTR_ERR(inode);
@@ -504,47 +504,19 @@ static int gfs2_rmdir(struct inode *dir, struct dentry *dentry) 
static int gfs2_mknod(struct inode *dir, struct dentry *dentry, int mode,

		      dev_t dev)

{

	struct gfs2_inode *dip = GFS2_I(dir), *ip;

	struct gfs2_inode *dip = GFS2_I(dir);

	struct gfs2_sbd *sdp = GFS2_SB(dir);

	struct gfs2_holder ghs[2];

	struct inode *inode;

	struct buffer_head *dibh;

	u32 major = 0, minor = 0;

	int error;



	switch (mode & S_IFMT) {

	case S_IFBLK:

	case S_IFCHR:

		major = MAJOR(dev);

		minor = MINOR(dev);

		break;

	case S_IFIFO:

	case S_IFSOCK:

		break;

	default:

		return -EOPNOTSUPP;

	};



	gfs2_holder_init(dip->i_gl, 0, 0, ghs);



	inode = gfs2_createi(ghs, &dentry->d_name, mode);

	inode = gfs2_createi(ghs, &dentry->d_name, mode, dev);

	if (IS_ERR(inode)) {

		gfs2_holder_uninit(ghs);

		return PTR_ERR(inode);

	}



	ip = ghs[1].gh_gl->gl_object;



	ip->i_di.di_major = major;

	ip->i_di.di_minor = minor;



	error = gfs2_meta_inode_buffer(ip, &dibh);



	if (!gfs2_assert_withdraw(sdp, !error)) {

		gfs2_dinode_out(ip, dibh->b_data);

		brelse(dibh);

	}



	gfs2_trans_end(sdp);

	if (dip->i_alloc.al_rgd)

		gfs2_inplace_release(dip);

include/linux/gfs2_ondisk.h

+0 −2
Original line number Diff line number Diff line
@@ -331,8 +331,6 @@ struct gfs2_dinode_host { 
	__u64 di_atime;	/* time last accessed */

	__u64 di_mtime;	/* time last modified */

	__u64 di_ctime;	/* time last changed */

	__u32 di_major;	/* device major number */

	__u32 di_minor;	/* device minor number */



	/* This section varies from gfs1. Padding added to align with

         * remainder of dinode