Merge git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6-nmw

* git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6-nmw: (31 commits)
  GFS2: Fix glock refcount issues
  writeback: remove unused nonblocking and congestion checks (gfs2)
  GFS2: drop rindex glock to refresh rindex list
  GFS2: Tag all metadata with jid
  GFS2: Locking order fix in gfs2_check_blk_state
  GFS2: Remove dirent_first() function
  GFS2: Display nobarrier option in /proc/mounts
  GFS2: add barrier/nobarrier mount options
  GFS2: remove division from new statfs code
  GFS2: Improve statfs and quota usability
  GFS2: Use dquot_send_warning()
  VFS: Export dquot_send_warning
  GFS2: Add set_xquota support
  GFS2: Add get_xquota support
  GFS2: Clean up gfs2_adjust_quota() and do_glock()
  GFS2: Remove constant argument from qd_get()
  GFS2: Remove constant argument from qdsb_get()
  GFS2: Add proper error reporting to quota sync via sysfs
  GFS2: Add get_xstate quota function
  GFS2: Remove obsolete code in quota.c
  ...

fs/gfs2/Kconfig

@@ -8,6 +8,8 @@ config GFS2_FS
 	select FS_POSIX_ACL
 	select CRC32
 	select SLOW_WORK
+	select QUOTA
+	select QUOTACTL
 	help
 	  A cluster filesystem.
 

fs/gfs2/acl.c

@@ -12,6 +12,7 @@
 #include <linux/spinlock.h>
 #include <linux/completion.h>
 #include <linux/buffer_head.h>
+#include <linux/xattr.h>
 #include <linux/posix_acl.h>
 #include <linux/posix_acl_xattr.h>
 #include <linux/gfs2_ondisk.h>
@@ -26,108 +27,44 @@
 #include "trans.h"
 #include "util.h"
 
-#define ACL_ACCESS 1
+static const char *gfs2_acl_name(int type)
-#define ACL_DEFAULT 0
+{
+	switch (type) {
+	case ACL_TYPE_ACCESS:
+		return GFS2_POSIX_ACL_ACCESS;
+	case ACL_TYPE_DEFAULT:
+		return GFS2_POSIX_ACL_DEFAULT;
+	}
+	return NULL;
+}
 
-int gfs2_acl_validate_set(struct gfs2_inode *ip, int access,
+static struct posix_acl *gfs2_acl_get(struct gfs2_inode *ip, int type)
-			  struct gfs2_ea_request *er, int *remove, mode_t *mode)
 {
 	struct posix_acl *acl;
-	int error;
+	const char *name;
-
-	error = gfs2_acl_validate_remove(ip, access);
-	if (error)
-		return error;
-
-	if (!er->er_data)
-		return -EINVAL;
-
-	acl = posix_acl_from_xattr(er->er_data, er->er_data_len);
-	if (IS_ERR(acl))
-		return PTR_ERR(acl);
-	if (!acl) {
-		*remove = 1;
-		return 0;
-	}
-
-	error = posix_acl_valid(acl);
-	if (error)
-		goto out;
-
-	if (access) {
-		error = posix_acl_equiv_mode(acl, mode);
-		if (!error)
-			*remove = 1;
-		else if (error > 0)
-			error = 0;
-	}
-
-out:
-	posix_acl_release(acl);
-	return error;
-}
-
-int gfs2_acl_validate_remove(struct gfs2_inode *ip, int access)
-{
-	if (!GFS2_SB(&ip->i_inode)->sd_args.ar_posix_acl)
-		return -EOPNOTSUPP;
-	if (!is_owner_or_cap(&ip->i_inode))
-		return -EPERM;
-	if (S_ISLNK(ip->i_inode.i_mode))
-		return -EOPNOTSUPP;
-	if (!access && !S_ISDIR(ip->i_inode.i_mode))
-		return -EACCES;
-
-	return 0;
-}
-
-static int acl_get(struct gfs2_inode *ip, const char *name,
-		   struct posix_acl **acl, struct gfs2_ea_location *el,
-		   char **datap, unsigned int *lenp)
-{
 	char *data;
-	unsigned int len;
+	int len;
-	int error;
-
-	el->el_bh = NULL;
 
 	if (!ip->i_eattr)
-		return 0;
+		return NULL;
 
-	error = gfs2_ea_find(ip, GFS2_EATYPE_SYS, name, el);
+	acl = get_cached_acl(&ip->i_inode, type);
-	if (error)
+	if (acl != ACL_NOT_CACHED)
-		return error;
+		return acl;
-	if (!el->el_ea)
-		return 0;
-	if (!GFS2_EA_DATA_LEN(el->el_ea))
-		goto out;
 
-	len = GFS2_EA_DATA_LEN(el->el_ea);
+	name = gfs2_acl_name(type);
-	data = kmalloc(len, GFP_NOFS);
+	if (name == NULL)
-	error = -ENOMEM;
+		return ERR_PTR(-EINVAL);
-	if (!data)
-		goto out;
 
-	error = gfs2_ea_get_copy(ip, el, data, len);
+	len = gfs2_xattr_acl_get(ip, name, &data);
-	if (error < 0)
+	if (len < 0)
-		goto out_kfree;
+		return ERR_PTR(len);
-	error = 0;
+	if (len == 0)
+		return NULL;
 
-	if (acl) {
+	acl = posix_acl_from_xattr(data, len);
-		*acl = posix_acl_from_xattr(data, len);
+	kfree(data);
-		if (IS_ERR(*acl))
+	return acl;
-			error = PTR_ERR(*acl);
-	}
-
-out_kfree:
-	if (error || !datap) {
-		kfree(data);
-	} else {
-		*datap = data;
-		*lenp = len;
-	}
-out:
-	return error;
 }
 
 /**
@@ -140,14 +77,12 @@ out:
 
 int gfs2_check_acl(struct inode *inode, int mask)
 {
-	struct gfs2_ea_location el;
+	struct posix_acl *acl;
-	struct posix_acl *acl = NULL;
 	int error;
 
-	error = acl_get(GFS2_I(inode), GFS2_POSIX_ACL_ACCESS, &acl, &el, NULL, NULL);
+	acl = gfs2_acl_get(GFS2_I(inode), ACL_TYPE_ACCESS);
-	brelse(el.el_bh);
+	if (IS_ERR(acl))
-	if (error)
+		return PTR_ERR(acl);
-		return error;
 
 	if (acl) {
 		error = posix_acl_permission(inode, acl, mask);
@@ -158,57 +93,75 @@ int gfs2_check_acl(struct inode *inode, int mask)
 	return -EAGAIN;
 }
 
-static int munge_mode(struct gfs2_inode *ip, mode_t mode)
+static int gfs2_set_mode(struct inode *inode, mode_t mode)
 {
-	struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
+	int error = 0;
-	struct buffer_head *dibh;
-	int error;
 
-	error = gfs2_trans_begin(sdp, RES_DINODE, 0);
+	if (mode != inode->i_mode) {
-	if (error)
+		struct iattr iattr;
-		return error;
 
-	error = gfs2_meta_inode_buffer(ip, &dibh);
+		iattr.ia_valid = ATTR_MODE;
-	if (!error) {
+		iattr.ia_mode = mode;
-		gfs2_assert_withdraw(sdp,
+
-				(ip->i_inode.i_mode & S_IFMT) == (mode & S_IFMT));
+		error = gfs2_setattr_simple(GFS2_I(inode), &iattr);
-		ip->i_inode.i_mode = mode;
-		gfs2_trans_add_bh(ip->i_gl, dibh, 1);
-		gfs2_dinode_out(ip, dibh->b_data);
-		brelse(dibh);
 	}
 
-	gfs2_trans_end(sdp);
+	return error;
-
-	return 0;
 }
 
-int gfs2_acl_create(struct gfs2_inode *dip, struct gfs2_inode *ip)
+static int gfs2_acl_set(struct inode *inode, int type, struct posix_acl *acl)
 {
-	struct gfs2_ea_location el;
-	struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
-	struct posix_acl *acl = NULL, *clone;
-	mode_t mode = ip->i_inode.i_mode;
-	char *data = NULL;
-	unsigned int len;
 	int error;
+	int len;
+	char *data;
+	const char *name = gfs2_acl_name(type);
+
+	BUG_ON(name == NULL);
+	len = posix_acl_to_xattr(acl, NULL, 0);
+	if (len == 0)
+		return 0;
+	data = kmalloc(len, GFP_NOFS);
+	if (data == NULL)
+		return -ENOMEM;
+	error = posix_acl_to_xattr(acl, data, len);
+	if (error < 0)
+		goto out;
+	error = gfs2_xattr_set(inode, GFS2_EATYPE_SYS, name, data, len, 0);
+	if (!error)
+		set_cached_acl(inode, type, acl);
+out:
+	kfree(data);
+	return error;
+}
+
+int gfs2_acl_create(struct gfs2_inode *dip, struct inode *inode)
+{
+	struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
+	struct posix_acl *acl, *clone;
+	mode_t mode = inode->i_mode;
+	int error = 0;
 
 	if (!sdp->sd_args.ar_posix_acl)
 		return 0;
-	if (S_ISLNK(ip->i_inode.i_mode))
+	if (S_ISLNK(inode->i_mode))
 		return 0;
 
-	error = acl_get(dip, GFS2_POSIX_ACL_DEFAULT, &acl, &el, &data, &len);
+	acl = gfs2_acl_get(dip, ACL_TYPE_DEFAULT);
-	brelse(el.el_bh);
+	if (IS_ERR(acl))
-	if (error)
+		return PTR_ERR(acl);
-		return error;
 	if (!acl) {
 		mode &= ~current_umask();
-		if (mode != ip->i_inode.i_mode)
+		if (mode != inode->i_mode)
-			error = munge_mode(ip, mode);
+			error = gfs2_set_mode(inode, mode);
 		return error;
 	}
 
+	if (S_ISDIR(inode->i_mode)) {
+		error = gfs2_acl_set(inode, ACL_TYPE_DEFAULT, acl);
+		if (error)
+			goto out;
+	}
+
 	clone = posix_acl_clone(acl, GFP_NOFS);
 	error = -ENOMEM;
 	if (!clone)
@@ -216,43 +169,32 @@ int gfs2_acl_create(struct gfs2_inode *dip, struct gfs2_inode *ip)
 	posix_acl_release(acl);
 	acl = clone;
 
-	if (S_ISDIR(ip->i_inode.i_mode)) {
-		error = gfs2_xattr_set(&ip->i_inode, GFS2_EATYPE_SYS,
-				       GFS2_POSIX_ACL_DEFAULT, data, len, 0);
-		if (error)
-			goto out;
-	}
-
 	error = posix_acl_create_masq(acl, &mode);
 	if (error < 0)
 		goto out;
 	if (error == 0)
 		goto munge;
 
-	posix_acl_to_xattr(acl, data, len);
+	error = gfs2_acl_set(inode, ACL_TYPE_ACCESS, acl);
-	error = gfs2_xattr_set(&ip->i_inode, GFS2_EATYPE_SYS,
-			       GFS2_POSIX_ACL_ACCESS, data, len, 0);
 	if (error)
 		goto out;
 munge:
-	error = munge_mode(ip, mode);
+	error = gfs2_set_mode(inode, mode);
 out:
 	posix_acl_release(acl);
-	kfree(data);
 	return error;
 }
 
 int gfs2_acl_chmod(struct gfs2_inode *ip, struct iattr *attr)
 {
-	struct posix_acl *acl = NULL, *clone;
+	struct posix_acl *acl, *clone;
-	struct gfs2_ea_location el;
 	char *data;
 	unsigned int len;
 	int error;
 
-	error = acl_get(ip, GFS2_POSIX_ACL_ACCESS, &acl, &el, &data, &len);
+	acl = gfs2_acl_get(ip, ACL_TYPE_ACCESS);
-	if (error)
+	if (IS_ERR(acl))
-		goto out_brelse;
+		return PTR_ERR(acl);
 	if (!acl)
 		return gfs2_setattr_simple(ip, attr);
 
@@ -265,15 +207,134 @@ int gfs2_acl_chmod(struct gfs2_inode *ip, struct iattr *attr)
 
 	error = posix_acl_chmod_masq(acl, attr->ia_mode);
 	if (!error) {
+		len = posix_acl_to_xattr(acl, NULL, 0);
+		data = kmalloc(len, GFP_NOFS);
+		error = -ENOMEM;
+		if (data == NULL)
+			goto out;
 		posix_acl_to_xattr(acl, data, len);
-		error = gfs2_ea_acl_chmod(ip, &el, attr, data);
+		error = gfs2_xattr_acl_chmod(ip, attr, data);
+		kfree(data);
+		set_cached_acl(&ip->i_inode, ACL_TYPE_ACCESS, acl);
 	}
 
 out:
 	posix_acl_release(acl);
-	kfree(data);
-out_brelse:
-	brelse(el.el_bh);
 	return error;
 }
 
+static int gfs2_acl_type(const char *name)
+{
+	if (strcmp(name, GFS2_POSIX_ACL_ACCESS) == 0)
+		return ACL_TYPE_ACCESS;
+	if (strcmp(name, GFS2_POSIX_ACL_DEFAULT) == 0)
+		return ACL_TYPE_DEFAULT;
+	return -EINVAL;
+}
+
+static int gfs2_xattr_system_get(struct inode *inode, const char *name,
+				 void *buffer, size_t size)
+{
+	struct posix_acl *acl;
+	int type;
+	int error;
+
+	type = gfs2_acl_type(name);
+	if (type < 0)
+		return type;
+
+	acl = gfs2_acl_get(GFS2_I(inode), type);
+	if (IS_ERR(acl))
+		return PTR_ERR(acl);
+	if (acl == NULL)
+		return -ENODATA;
+
+	error = posix_acl_to_xattr(acl, buffer, size);
+	posix_acl_release(acl);
+
+	return error;
+}
+
+static int gfs2_xattr_system_set(struct inode *inode, const char *name,
+				 const void *value, size_t size, int flags)
+{
+	struct gfs2_sbd *sdp = GFS2_SB(inode);
+	struct posix_acl *acl = NULL;
+	int error = 0, type;
+
+	if (!sdp->sd_args.ar_posix_acl)
+		return -EOPNOTSUPP;
+
+	type = gfs2_acl_type(name);
+	if (type < 0)
+		return type;
+	if (flags & XATTR_CREATE)
+		return -EINVAL;
+	if (type == ACL_TYPE_DEFAULT && !S_ISDIR(inode->i_mode))
+		return value ? -EACCES : 0;
+	if ((current_fsuid() != inode->i_uid) && !capable(CAP_FOWNER))
+		return -EPERM;
+	if (S_ISLNK(inode->i_mode))
+		return -EOPNOTSUPP;
+
+	if (!value)
+		goto set_acl;
+
+	acl = posix_acl_from_xattr(value, size);
+	if (!acl) {
+		/*
+		 * acl_set_file(3) may request that we set default ACLs with
+		 * zero length -- defend (gracefully) against that here.
+		 */
+		goto out;
+	}
+	if (IS_ERR(acl)) {
+		error = PTR_ERR(acl);
+		goto out;
+	}
+
+	error = posix_acl_valid(acl);
+	if (error)
+		goto out_release;
+
+	error = -EINVAL;
+	if (acl->a_count > GFS2_ACL_MAX_ENTRIES)
+		goto out_release;
+
+	if (type == ACL_TYPE_ACCESS) {
+		mode_t mode = inode->i_mode;
+		error = posix_acl_equiv_mode(acl, &mode);
+
+		if (error <= 0) {
+			posix_acl_release(acl);
+			acl = NULL;
+
+			if (error < 0)
+				return error;
+		}
+
+		error = gfs2_set_mode(inode, mode);
+		if (error)
+			goto out_release;
+	}
+
+set_acl:
+	error = gfs2_xattr_set(inode, GFS2_EATYPE_SYS, name, value, size, 0);
+	if (!error) {
+		if (acl)
+			set_cached_acl(inode, type, acl);
+		else
+			forget_cached_acl(inode, type);
+	}
+out_release:
+	posix_acl_release(acl);
+out:
+	return error;
+}
+
+struct xattr_handler gfs2_xattr_system_handler = {
+	.prefix = XATTR_SYSTEM_PREFIX,
+	.get    = gfs2_xattr_system_get,
+	.set    = gfs2_xattr_system_set,
+};
+

fs/gfs2/acl.h

@@ -13,26 +13,12 @@
 #include "incore.h"
 
 #define GFS2_POSIX_ACL_ACCESS		"posix_acl_access"
-#define GFS2_POSIX_ACL_ACCESS_LEN	16
 #define GFS2_POSIX_ACL_DEFAULT		"posix_acl_default"
-#define GFS2_POSIX_ACL_DEFAULT_LEN	17
+#define GFS2_ACL_MAX_ENTRIES		25
 
-#define GFS2_ACL_IS_ACCESS(name, len) \
+extern int gfs2_check_acl(struct inode *inode, int mask);
-         ((len) == GFS2_POSIX_ACL_ACCESS_LEN && \
+extern int gfs2_acl_create(struct gfs2_inode *dip, struct inode *inode);
-         !memcmp(GFS2_POSIX_ACL_ACCESS, (name), (len)))
+extern int gfs2_acl_chmod(struct gfs2_inode *ip, struct iattr *attr);
-
+extern struct xattr_handler gfs2_xattr_system_handler;
-#define GFS2_ACL_IS_DEFAULT(name, len) \
-         ((len) == GFS2_POSIX_ACL_DEFAULT_LEN && \
-         !memcmp(GFS2_POSIX_ACL_DEFAULT, (name), (len)))
-
-struct gfs2_ea_request;
-
-int gfs2_acl_validate_set(struct gfs2_inode *ip, int access,
-			  struct gfs2_ea_request *er,
-			  int *remove, mode_t *mode);
-int gfs2_acl_validate_remove(struct gfs2_inode *ip, int access);
-int gfs2_check_acl(struct inode *inode, int mask);
-int gfs2_acl_create(struct gfs2_inode *dip, struct gfs2_inode *ip);
-int gfs2_acl_chmod(struct gfs2_inode *ip, struct iattr *attr);
 
 #endif /* __ACL_DOT_H__ */

fs/gfs2/aops.c

@@ -269,7 +269,6 @@ static int gfs2_write_jdata_pagevec(struct address_space *mapping,
 	pgoff_t end_index = i_size >> PAGE_CACHE_SHIFT;
 	unsigned offset = i_size & (PAGE_CACHE_SIZE-1);
 	unsigned nrblocks = nr_pages * (PAGE_CACHE_SIZE/inode->i_sb->s_blocksize);
-	struct backing_dev_info *bdi = mapping->backing_dev_info;
 	int i;
 	int ret;
 
@@ -313,11 +312,6 @@ static int gfs2_write_jdata_pagevec(struct address_space *mapping,
 
 		if (ret || (--(wbc->nr_to_write) <= 0))
 			ret = 1;
-		if (wbc->nonblocking && bdi_write_congested(bdi)) {
-			wbc->encountered_congestion = 1;
-			ret = 1;
-		}
-
 	}
 	gfs2_trans_end(sdp);
 	return ret;
@@ -338,7 +332,6 @@ static int gfs2_write_jdata_pagevec(struct address_space *mapping,
 static int gfs2_write_cache_jdata(struct address_space *mapping,
 				  struct writeback_control *wbc)
 {
-	struct backing_dev_info *bdi = mapping->backing_dev_info;
 	int ret = 0;
 	int done = 0;
 	struct pagevec pvec;
@@ -348,11 +341,6 @@ static int gfs2_write_cache_jdata(struct address_space *mapping,
 	int scanned = 0;
 	int range_whole = 0;
 
-	if (wbc->nonblocking && bdi_write_congested(bdi)) {
-		wbc->encountered_congestion = 1;
-		return 0;
-	}
-
 	pagevec_init(&pvec, 0);
 	if (wbc->range_cyclic) {
 		index = mapping->writeback_index; /* Start from prev offset */
@@ -819,8 +807,10 @@ static int gfs2_stuffed_write_end(struct inode *inode, struct buffer_head *dibh,
 		mark_inode_dirty(inode);
 	}
 
-	if (inode == sdp->sd_rindex)
+	if (inode == sdp->sd_rindex) {
 		adjust_fs_space(inode);
+		ip->i_gh.gh_flags |= GL_NOCACHE;
+	}
 
 	brelse(dibh);
 	gfs2_trans_end(sdp);
@@ -889,8 +879,10 @@ static int gfs2_write_end(struct file *file, struct address_space *mapping,
 		mark_inode_dirty(inode);
 	}
 
-	if (inode == sdp->sd_rindex)
+	if (inode == sdp->sd_rindex) {
 		adjust_fs_space(inode);
+		ip->i_gh.gh_flags |= GL_NOCACHE;
+	}
 
 	brelse(dibh);
 	gfs2_trans_end(sdp);

fs/gfs2/dir.c

@@ -525,38 +525,6 @@ consist_inode:
 	return ERR_PTR(-EIO);
 }
 
-
-/**
- * dirent_first - Return the first dirent
- * @dip: the directory
- * @bh: The buffer
- * @dent: Pointer to list of dirents
- *
- * return first dirent whether bh points to leaf or stuffed dinode
- *
- * Returns: IS_LEAF, IS_DINODE, or -errno
- */
-
-static int dirent_first(struct gfs2_inode *dip, struct buffer_head *bh,
-			struct gfs2_dirent **dent)
-{
-	struct gfs2_meta_header *h = (struct gfs2_meta_header *)bh->b_data;
-
-	if (be32_to_cpu(h->mh_type) == GFS2_METATYPE_LF) {
-		if (gfs2_meta_check(GFS2_SB(&dip->i_inode), bh))
-			return -EIO;
-		*dent = (struct gfs2_dirent *)(bh->b_data +
-					       sizeof(struct gfs2_leaf));
-		return IS_LEAF;
-	} else {
-		if (gfs2_metatype_check(GFS2_SB(&dip->i_inode), bh, GFS2_METATYPE_DI))
-			return -EIO;
-		*dent = (struct gfs2_dirent *)(bh->b_data +
-					       sizeof(struct gfs2_dinode));
-		return IS_DINODE;
-	}
-}
-
 static int dirent_check_reclen(struct gfs2_inode *dip,
 			       const struct gfs2_dirent *d, const void *end_p)
 {
@@ -1006,7 +974,7 @@ static int dir_split_leaf(struct inode *inode, const struct qstr *name)
 	divider = (start + half_len) << (32 - dip->i_depth);
 
 	/*  Copy the entries  */
-	dirent_first(dip, obh, &dent);
+	dent = (struct gfs2_dirent *)(obh->b_data + sizeof(struct gfs2_leaf));
 
 	do {
 		next = dent;

fs/gfs2/glock.c

@@ -241,15 +241,14 @@ int gfs2_glock_put(struct gfs2_glock *gl)
 	int rv = 0;
 
 	write_lock(gl_lock_addr(gl->gl_hash));
-	if (atomic_dec_and_test(&gl->gl_ref)) {
+	if (atomic_dec_and_lock(&gl->gl_ref, &lru_lock)) {
 		hlist_del(&gl->gl_list);
-		write_unlock(gl_lock_addr(gl->gl_hash));
-		spin_lock(&lru_lock);
 		if (!list_empty(&gl->gl_lru)) {
 			list_del_init(&gl->gl_lru);
 			atomic_dec(&lru_count);
 		}
 		spin_unlock(&lru_lock);
+		write_unlock(gl_lock_addr(gl->gl_hash));
 		GLOCK_BUG_ON(gl, !list_empty(&gl->gl_holders));
 		glock_free(gl);
 		rv = 1;
@@ -513,7 +512,6 @@ retry:
 			GLOCK_BUG_ON(gl, 1);
 		}
 		spin_unlock(&gl->gl_spin);
-		gfs2_glock_put(gl);
 		return;
 	}
 
@@ -524,8 +522,6 @@ retry:
 		if (glops->go_xmote_bh) {
 			spin_unlock(&gl->gl_spin);
 			rv = glops->go_xmote_bh(gl, gh);
-			if (rv == -EAGAIN)
-				return;
 			spin_lock(&gl->gl_spin);
 			if (rv) {
 				do_error(gl, rv);
@@ -540,7 +536,6 @@ out:
 	clear_bit(GLF_LOCK, &gl->gl_flags);
 out_locked:
 	spin_unlock(&gl->gl_spin);
-	gfs2_glock_put(gl);
 }
 
 static unsigned int gfs2_lm_lock(struct gfs2_sbd *sdp, void *lock,
@@ -600,7 +595,6 @@ __acquires(&gl->gl_spin)
 
 	if (!(ret & LM_OUT_ASYNC)) {
 		finish_xmote(gl, ret);
-		gfs2_glock_hold(gl);
 		if (queue_delayed_work(glock_workqueue, &gl->gl_work, 0) == 0)
 			gfs2_glock_put(gl);
 	} else {
@@ -672,12 +666,17 @@ out:
 	return;
 
 out_sched:
+	clear_bit(GLF_LOCK, &gl->gl_flags);
+	smp_mb__after_clear_bit();
 	gfs2_glock_hold(gl);
 	if (queue_delayed_work(glock_workqueue, &gl->gl_work, 0) == 0)
 		gfs2_glock_put_nolock(gl);
+	return;
+
 out_unlock:
 	clear_bit(GLF_LOCK, &gl->gl_flags);
-	goto out;
+	smp_mb__after_clear_bit();
+	return;
 }
 
 static void delete_work_func(struct work_struct *work)
@@ -707,9 +706,12 @@ static void glock_work_func(struct work_struct *work)
 {
 	unsigned long delay = 0;
 	struct gfs2_glock *gl = container_of(work, struct gfs2_glock, gl_work.work);
+	int drop_ref = 0;
 
-	if (test_and_clear_bit(GLF_REPLY_PENDING, &gl->gl_flags))
+	if (test_and_clear_bit(GLF_REPLY_PENDING, &gl->gl_flags)) {
 		finish_xmote(gl, gl->gl_reply);
+		drop_ref = 1;
+	}
 	down_read(&gfs2_umount_flush_sem);
 	spin_lock(&gl->gl_spin);
 	if (test_and_clear_bit(GLF_PENDING_DEMOTE, &gl->gl_flags) &&
@@ -727,6 +729,8 @@ static void glock_work_func(struct work_struct *work)
 	if (!delay ||
 	    queue_delayed_work(glock_workqueue, &gl->gl_work, delay) == 0)
 		gfs2_glock_put(gl);
+	if (drop_ref)
+		gfs2_glock_put(gl);
 }
 
 /**
@@ -1361,10 +1365,6 @@ static int gfs2_shrink_glock_memory(int nr, gfp_t gfp_mask)
 		list_del_init(&gl->gl_lru);
 		atomic_dec(&lru_count);
 
-		/* Check if glock is about to be freed */
-		if (atomic_read(&gl->gl_ref) == 0)
-			continue;
-
 		/* Test for being demotable */
 		if (!test_and_set_bit(GLF_LOCK, &gl->gl_flags)) {
 			gfs2_glock_hold(gl);
@@ -1375,10 +1375,11 @@ static int gfs2_shrink_glock_memory(int nr, gfp_t gfp_mask)
 				handle_callback(gl, LM_ST_UNLOCKED, 0);
 				nr--;
 			}
+			clear_bit(GLF_LOCK, &gl->gl_flags);
+			smp_mb__after_clear_bit();
 			if (queue_delayed_work(glock_workqueue, &gl->gl_work, 0) == 0)
 				gfs2_glock_put_nolock(gl);
 			spin_unlock(&gl->gl_spin);
-			clear_bit(GLF_LOCK, &gl->gl_flags);
 			spin_lock(&lru_lock);
 			continue;
 		}

fs/gfs2/glock.h

@@ -180,15 +180,6 @@ static inline int gfs2_glock_is_held_shrd(struct gfs2_glock *gl)
 	return gl->gl_state == LM_ST_SHARED;
 }
 
-static inline int gfs2_glock_is_blocking(struct gfs2_glock *gl)
-{
-	int ret;
-	spin_lock(&gl->gl_spin);
-	ret = test_bit(GLF_DEMOTE, &gl->gl_flags);
-	spin_unlock(&gl->gl_spin);
-	return ret;
-}
-
 int gfs2_glock_get(struct gfs2_sbd *sdp,
 		   u64 number, const struct gfs2_glock_operations *glops,
 		   int create, struct gfs2_glock **glp);

fs/gfs2/glops.c

@@ -13,6 +13,7 @@
 #include <linux/buffer_head.h>
 #include <linux/gfs2_ondisk.h>
 #include <linux/bio.h>
+#include <linux/posix_acl.h>
 
 #include "gfs2.h"
 #include "incore.h"
@@ -184,8 +185,10 @@ static void inode_go_inval(struct gfs2_glock *gl, int flags)
 	if (flags & DIO_METADATA) {
 		struct address_space *mapping = gl->gl_aspace->i_mapping;
 		truncate_inode_pages(mapping, 0);
-		if (ip)
+		if (ip) {
 			set_bit(GIF_INVALID, &ip->i_flags);
+			forget_all_cached_acls(&ip->i_inode);
+		}
 	}
 
 	if (ip == GFS2_I(gl->gl_sbd->sd_rindex))

fs/gfs2/incore.h

@@ -429,7 +429,11 @@ struct gfs2_args {
 	unsigned int ar_meta:1;			/* mount metafs */
 	unsigned int ar_discard:1;		/* discard requests */
 	unsigned int ar_errors:2;               /* errors=withdraw | panic */
+	unsigned int ar_nobarrier:1;            /* do not send barriers */
 	int ar_commit;				/* Commit interval */
+	int ar_statfs_quantum;			/* The fast statfs interval */
+	int ar_quota_quantum;			/* The quota interval */
+	int ar_statfs_percent;			/* The % change to force sync */
 };
 
 struct gfs2_tune {
@@ -558,6 +562,7 @@ struct gfs2_sbd {
 	spinlock_t sd_statfs_spin;
 	struct gfs2_statfs_change_host sd_statfs_master;
 	struct gfs2_statfs_change_host sd_statfs_local;
+	int sd_statfs_force_sync;
 
 	/* Resource group stuff */
 

fs/gfs2/inode.c

@@ -871,7 +871,7 @@ struct inode *gfs2_createi(struct gfs2_holder *ghs, const struct qstr *name,
 	if (error)
 		goto fail_gunlock2;
 
-	error = gfs2_acl_create(dip, GFS2_I(inode));
+	error = gfs2_acl_create(dip, inode);
 	if (error)
 		goto fail_gunlock2;
 
@@ -947,9 +947,7 @@ void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf)
 
 	str->di_header.mh_magic = cpu_to_be32(GFS2_MAGIC);
 	str->di_header.mh_type = cpu_to_be32(GFS2_METATYPE_DI);
-	str->di_header.__pad0 = 0;
 	str->di_header.mh_format = cpu_to_be32(GFS2_FORMAT_DI);
-	str->di_header.__pad1 = 0;
 	str->di_num.no_addr = cpu_to_be64(ip->i_no_addr);
 	str->di_num.no_formal_ino = cpu_to_be64(ip->i_no_formal_ino);
 	str->di_mode = cpu_to_be32(ip->i_inode.i_mode);

fs/gfs2/log.c

@@ -596,7 +596,9 @@ static void log_write_header(struct gfs2_sbd *sdp, u32 flags, int pull)
 	memset(lh, 0, sizeof(struct gfs2_log_header));
 	lh->lh_header.mh_magic = cpu_to_be32(GFS2_MAGIC);
 	lh->lh_header.mh_type = cpu_to_be32(GFS2_METATYPE_LH);
+	lh->lh_header.__pad0 = cpu_to_be64(0);
 	lh->lh_header.mh_format = cpu_to_be32(GFS2_FORMAT_LH);
+	lh->lh_header.mh_jid = cpu_to_be32(sdp->sd_jdesc->jd_jid);
 	lh->lh_sequence = cpu_to_be64(sdp->sd_log_sequence++);
 	lh->lh_flags = cpu_to_be32(flags);
 	lh->lh_tail = cpu_to_be32(tail);

fs/gfs2/lops.c

@@ -132,6 +132,7 @@ static struct buffer_head *gfs2_get_log_desc(struct gfs2_sbd *sdp, u32 ld_type)
 static void buf_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le)
 {
 	struct gfs2_bufdata *bd = container_of(le, struct gfs2_bufdata, bd_le);
+	struct gfs2_meta_header *mh;
 	struct gfs2_trans *tr;
 
 	lock_buffer(bd->bd_bh);
@@ -148,6 +149,9 @@ static void buf_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le)
 	set_bit(GLF_DIRTY, &bd->bd_gl->gl_flags);
 	gfs2_meta_check(sdp, bd->bd_bh);
 	gfs2_pin(sdp, bd->bd_bh);
+	mh = (struct gfs2_meta_header *)bd->bd_bh->b_data;
+	mh->__pad0 = cpu_to_be64(0);
+	mh->mh_jid = cpu_to_be32(sdp->sd_jdesc->jd_jid);
 	sdp->sd_log_num_buf++;
 	list_add(&le->le_list, &sdp->sd_log_le_buf);
 	tr->tr_num_buf_new++;

fs/gfs2/ops_fstype.c

@@ -18,6 +18,7 @@
 #include <linux/mount.h>
 #include <linux/gfs2_ondisk.h>
 #include <linux/slow-work.h>
+#include <linux/quotaops.h>
 
 #include "gfs2.h"
 #include "incore.h"
@@ -62,13 +63,10 @@ static void gfs2_tune_init(struct gfs2_tune *gt)
 	gt->gt_quota_warn_period = 10;
 	gt->gt_quota_scale_num = 1;
 	gt->gt_quota_scale_den = 1;
-	gt->gt_quota_quantum = 60;
 	gt->gt_new_files_jdata = 0;
 	gt->gt_max_readahead = 1 << 18;
 	gt->gt_stall_secs = 600;
 	gt->gt_complain_secs = 10;
-	gt->gt_statfs_quantum = 30;
-	gt->gt_statfs_slow = 0;
 }
 
 static struct gfs2_sbd *init_sbd(struct super_block *sb)
@@ -1114,7 +1112,7 @@ void gfs2_online_uevent(struct gfs2_sbd *sdp)
  * Returns: errno
  */
 
-static int fill_super(struct super_block *sb, void *data, int silent)
+static int fill_super(struct super_block *sb, struct gfs2_args *args, int silent)
 {
 	struct gfs2_sbd *sdp;
 	struct gfs2_holder mount_gh;
@@ -1125,17 +1123,7 @@ static int fill_super(struct super_block *sb, void *data, int silent)
 		printk(KERN_WARNING "GFS2: can't alloc struct gfs2_sbd\n");
 		return -ENOMEM;
 	}
-
+	sdp->sd_args = *args;
-	sdp->sd_args.ar_quota = GFS2_QUOTA_DEFAULT;
-	sdp->sd_args.ar_data = GFS2_DATA_DEFAULT;
-	sdp->sd_args.ar_commit = 60;
-	sdp->sd_args.ar_errors = GFS2_ERRORS_DEFAULT;
-
-	error = gfs2_mount_args(sdp, &sdp->sd_args, data);
-	if (error) {
-		printk(KERN_WARNING "GFS2: can't parse mount arguments\n");
-		goto fail;
-	}
 
 	if (sdp->sd_args.ar_spectator) {
                 sb->s_flags |= MS_RDONLY;
@@ -1143,11 +1131,15 @@ static int fill_super(struct super_block *sb, void *data, int silent)
 	}
 	if (sdp->sd_args.ar_posix_acl)
 		sb->s_flags |= MS_POSIXACL;
+	if (sdp->sd_args.ar_nobarrier)
+		set_bit(SDF_NOBARRIERS, &sdp->sd_flags);
 
 	sb->s_magic = GFS2_MAGIC;
 	sb->s_op = &gfs2_super_ops;
 	sb->s_export_op = &gfs2_export_ops;
 	sb->s_xattr = gfs2_xattr_handlers;
+	sb->s_qcop = &gfs2_quotactl_ops;
+	sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE;
 	sb->s_time_gran = 1;
 	sb->s_maxbytes = MAX_LFS_FILESIZE;
 
@@ -1160,6 +1152,15 @@ static int fill_super(struct super_block *sb, void *data, int silent)
 	sdp->sd_fsb2bb = 1 << sdp->sd_fsb2bb_shift;
 
 	sdp->sd_tune.gt_log_flush_secs = sdp->sd_args.ar_commit;
+	sdp->sd_tune.gt_quota_quantum = sdp->sd_args.ar_quota_quantum;
+	if (sdp->sd_args.ar_statfs_quantum) {
+		sdp->sd_tune.gt_statfs_slow = 0;
+		sdp->sd_tune.gt_statfs_quantum = sdp->sd_args.ar_statfs_quantum;
+	}
+	else {
+		sdp->sd_tune.gt_statfs_slow = 1;
+		sdp->sd_tune.gt_statfs_quantum = 30;
+	}
 
 	error = init_names(sdp, silent);
 	if (error)
@@ -1243,18 +1244,127 @@ fail:
 	return error;
 }
 
-static int gfs2_get_sb(struct file_system_type *fs_type, int flags,
+static int set_gfs2_super(struct super_block *s, void *data)
-		       const char *dev_name, void *data, struct vfsmount *mnt)
 {
-	return get_sb_bdev(fs_type, flags, dev_name, data, fill_super, mnt);
+	s->s_bdev = data;
+	s->s_dev = s->s_bdev->bd_dev;
+
+	/*
+	 * We set the bdi here to the queue backing, file systems can
+	 * overwrite this in ->fill_super()
+	 */
+	s->s_bdi = &bdev_get_queue(s->s_bdev)->backing_dev_info;
+	return 0;
 }
 
-static int test_meta_super(struct super_block *s, void *ptr)
+static int test_gfs2_super(struct super_block *s, void *ptr)
 {
 	struct block_device *bdev = ptr;
 	return (bdev == s->s_bdev);
 }
 
+/**
+ * gfs2_get_sb - Get the GFS2 superblock
+ * @fs_type: The GFS2 filesystem type
+ * @flags: Mount flags
+ * @dev_name: The name of the device
+ * @data: The mount arguments
+ * @mnt: The vfsmnt for this mount
+ *
+ * Q. Why not use get_sb_bdev() ?
+ * A. We need to select one of two root directories to mount, independent
+ *    of whether this is the initial, or subsequent, mount of this sb
+ *
+ * Returns: 0 or -ve on error
+ */
+
+static int gfs2_get_sb(struct file_system_type *fs_type, int flags,
+		       const char *dev_name, void *data, struct vfsmount *mnt)
+{
+	struct block_device *bdev;
+	struct super_block *s;
+	fmode_t mode = FMODE_READ;
+	int error;
+	struct gfs2_args args;
+	struct gfs2_sbd *sdp;
+
+	if (!(flags & MS_RDONLY))
+		mode |= FMODE_WRITE;
+
+	bdev = open_bdev_exclusive(dev_name, mode, fs_type);
+	if (IS_ERR(bdev))
+		return PTR_ERR(bdev);
+
+	/*
+	 * once the super is inserted into the list by sget, s_umount
+	 * will protect the lockfs code from trying to start a snapshot
+	 * while we are mounting
+	 */
+	mutex_lock(&bdev->bd_fsfreeze_mutex);
+	if (bdev->bd_fsfreeze_count > 0) {
+		mutex_unlock(&bdev->bd_fsfreeze_mutex);
+		error = -EBUSY;
+		goto error_bdev;
+	}
+	s = sget(fs_type, test_gfs2_super, set_gfs2_super, bdev);
+	mutex_unlock(&bdev->bd_fsfreeze_mutex);
+	error = PTR_ERR(s);
+	if (IS_ERR(s))
+		goto error_bdev;
+
+	memset(&args, 0, sizeof(args));
+	args.ar_quota = GFS2_QUOTA_DEFAULT;
+	args.ar_data = GFS2_DATA_DEFAULT;
+	args.ar_commit = 60;
+	args.ar_statfs_quantum = 30;
+	args.ar_quota_quantum = 60;
+	args.ar_errors = GFS2_ERRORS_DEFAULT;
+
+	error = gfs2_mount_args(&args, data);
+	if (error) {
+		printk(KERN_WARNING "GFS2: can't parse mount arguments\n");
+		if (s->s_root)
+			goto error_super;
+		deactivate_locked_super(s);
+		return error;
+	}
+
+	if (s->s_root) {
+		error = -EBUSY;
+		if ((flags ^ s->s_flags) & MS_RDONLY)
+			goto error_super;
+		close_bdev_exclusive(bdev, mode);
+	} else {
+		char b[BDEVNAME_SIZE];
+
+		s->s_flags = flags;
+		s->s_mode = mode;
+		strlcpy(s->s_id, bdevname(bdev, b), sizeof(s->s_id));
+		sb_set_blocksize(s, block_size(bdev));
+		error = fill_super(s, &args, flags & MS_SILENT ? 1 : 0);
+		if (error) {
+			deactivate_locked_super(s);
+			return error;
+		}
+		s->s_flags |= MS_ACTIVE;
+		bdev->bd_super = s;
+	}
+
+	sdp = s->s_fs_info;
+	mnt->mnt_sb = s;
+	if (args.ar_meta)
+		mnt->mnt_root = dget(sdp->sd_master_dir);
+	else
+		mnt->mnt_root = dget(sdp->sd_root_dir);
+	return 0;
+
+error_super:
+	deactivate_locked_super(s);
+error_bdev:
+	close_bdev_exclusive(bdev, mode);
+	return error;
+}
+
 static int set_meta_super(struct super_block *s, void *ptr)
 {
 	return -EINVAL;
@@ -1274,13 +1384,17 @@ static int gfs2_get_sb_meta(struct file_system_type *fs_type, int flags,
 		       dev_name, error);
 		return error;
 	}
-	s = sget(&gfs2_fs_type, test_meta_super, set_meta_super,
+	s = sget(&gfs2_fs_type, test_gfs2_super, set_meta_super,
 		 path.dentry->d_inode->i_sb->s_bdev);
 	path_put(&path);
 	if (IS_ERR(s)) {
 		printk(KERN_WARNING "GFS2: gfs2 mount does not exist\n");
 		return PTR_ERR(s);
 	}
+	if ((flags ^ s->s_flags) & MS_RDONLY) {
+		deactivate_locked_super(s);
+		return -EBUSY;
+	}
 	sdp = s->s_fs_info;
 	mnt->mnt_sb = s;
 	mnt->mnt_root = dget(sdp->sd_master_dir);

fs/gfs2/quota.c

@@ -15,7 +15,7 @@
  * fuzziness in the current usage value of IDs that are being used on different
  * nodes in the cluster simultaneously.  So, it is possible for a user on
  * multiple nodes to overrun their quota, but that overrun is controlable.
- * Since quota tags are part of transactions, there is no need to a quota check
+ * Since quota tags are part of transactions, there is no need for a quota check
  * program to be run on node crashes or anything like that.
  *
  * There are couple of knobs that let the administrator manage the quota
@@ -47,6 +47,8 @@
 #include <linux/gfs2_ondisk.h>
 #include <linux/kthread.h>
 #include <linux/freezer.h>
+#include <linux/quota.h>
+#include <linux/dqblk_xfs.h>
 
 #include "gfs2.h"
 #include "incore.h"
@@ -65,13 +67,6 @@
 #define QUOTA_USER 1
 #define QUOTA_GROUP 0
 
-struct gfs2_quota_host {
-	u64 qu_limit;
-	u64 qu_warn;
-	s64 qu_value;
-	u32 qu_ll_next;
-};
-
 struct gfs2_quota_change_host {
 	u64 qc_change;
 	u32 qc_flags; /* GFS2_QCF_... */
@@ -164,7 +159,7 @@ fail:
 	return error;
 }
 
-static int qd_get(struct gfs2_sbd *sdp, int user, u32 id, int create,
+static int qd_get(struct gfs2_sbd *sdp, int user, u32 id,
 		  struct gfs2_quota_data **qdp)
 {
 	struct gfs2_quota_data *qd = NULL, *new_qd = NULL;
@@ -202,7 +197,7 @@ static int qd_get(struct gfs2_sbd *sdp, int user, u32 id, int create,
 
 		spin_unlock(&qd_lru_lock);
 
-		if (qd || !create) {
+		if (qd) {
 			if (new_qd) {
 				gfs2_glock_put(new_qd->qd_gl);
 				kmem_cache_free(gfs2_quotad_cachep, new_qd);
@@ -461,12 +456,12 @@ static void qd_unlock(struct gfs2_quota_data *qd)
 	qd_put(qd);
 }
 
-static int qdsb_get(struct gfs2_sbd *sdp, int user, u32 id, int create,
+static int qdsb_get(struct gfs2_sbd *sdp, int user, u32 id,
 		    struct gfs2_quota_data **qdp)
 {
 	int error;
 
-	error = qd_get(sdp, user, id, create, qdp);
+	error = qd_get(sdp, user, id, qdp);
 	if (error)
 		return error;
 
@@ -508,20 +503,20 @@ int gfs2_quota_hold(struct gfs2_inode *ip, u32 uid, u32 gid)
 	if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
 		return 0;
 
-	error = qdsb_get(sdp, QUOTA_USER, ip->i_inode.i_uid, CREATE, qd);
+	error = qdsb_get(sdp, QUOTA_USER, ip->i_inode.i_uid, qd);
 	if (error)
 		goto out;
 	al->al_qd_num++;
 	qd++;
 
-	error = qdsb_get(sdp, QUOTA_GROUP, ip->i_inode.i_gid, CREATE, qd);
+	error = qdsb_get(sdp, QUOTA_GROUP, ip->i_inode.i_gid, qd);
 	if (error)
 		goto out;
 	al->al_qd_num++;
 	qd++;
 
 	if (uid != NO_QUOTA_CHANGE && uid != ip->i_inode.i_uid) {
-		error = qdsb_get(sdp, QUOTA_USER, uid, CREATE, qd);
+		error = qdsb_get(sdp, QUOTA_USER, uid, qd);
 		if (error)
 			goto out;
 		al->al_qd_num++;
@@ -529,7 +524,7 @@ int gfs2_quota_hold(struct gfs2_inode *ip, u32 uid, u32 gid)
 	}
 
 	if (gid != NO_QUOTA_CHANGE && gid != ip->i_inode.i_gid) {
-		error = qdsb_get(sdp, QUOTA_GROUP, gid, CREATE, qd);
+		error = qdsb_get(sdp, QUOTA_GROUP, gid, qd);
 		if (error)
 			goto out;
 		al->al_qd_num++;
@@ -617,48 +612,36 @@ static void do_qc(struct gfs2_quota_data *qd, s64 change)
 	mutex_unlock(&sdp->sd_quota_mutex);
 }
 
-static void gfs2_quota_in(struct gfs2_quota_host *qu, const void *buf)
-{
-	const struct gfs2_quota *str = buf;
-
-	qu->qu_limit = be64_to_cpu(str->qu_limit);
-	qu->qu_warn = be64_to_cpu(str->qu_warn);
-	qu->qu_value = be64_to_cpu(str->qu_value);
-	qu->qu_ll_next = be32_to_cpu(str->qu_ll_next);
-}
-
-static void gfs2_quota_out(const struct gfs2_quota_host *qu, void *buf)
-{
-	struct gfs2_quota *str = buf;
-
-	str->qu_limit = cpu_to_be64(qu->qu_limit);
-	str->qu_warn = cpu_to_be64(qu->qu_warn);
-	str->qu_value = cpu_to_be64(qu->qu_value);
-	str->qu_ll_next = cpu_to_be32(qu->qu_ll_next);
-	memset(&str->qu_reserved, 0, sizeof(str->qu_reserved));
-}
-
 /**
- * gfs2_adjust_quota
+ * gfs2_adjust_quota - adjust record of current block usage
+ * @ip: The quota inode
+ * @loc: Offset of the entry in the quota file
+ * @change: The amount of usage change to record
+ * @qd: The quota data
+ * @fdq: The updated limits to record
  *
  * This function was mostly borrowed from gfs2_block_truncate_page which was
  * in turn mostly borrowed from ext3
+ *
+ * Returns: 0 or -ve on error
  */
+
 static int gfs2_adjust_quota(struct gfs2_inode *ip, loff_t loc,
-			     s64 change, struct gfs2_quota_data *qd)
+			     s64 change, struct gfs2_quota_data *qd,
+			     struct fs_disk_quota *fdq)
 {
 	struct inode *inode = &ip->i_inode;
 	struct address_space *mapping = inode->i_mapping;
 	unsigned long index = loc >> PAGE_CACHE_SHIFT;
 	unsigned offset = loc & (PAGE_CACHE_SIZE - 1);
 	unsigned blocksize, iblock, pos;
-	struct buffer_head *bh;
+	struct buffer_head *bh, *dibh;
 	struct page *page;
 	void *kaddr;
-	char *ptr;
+	struct gfs2_quota *qp;
-	struct gfs2_quota_host qp;
 	s64 value;
 	int err = -EIO;
+	u64 size;
 
 	if (gfs2_is_stuffed(ip))
 		gfs2_unstuff_dinode(ip, NULL);
@@ -700,18 +683,38 @@ static int gfs2_adjust_quota(struct gfs2_inode *ip, loff_t loc,
 	gfs2_trans_add_bh(ip->i_gl, bh, 0);
 
 	kaddr = kmap_atomic(page, KM_USER0);
-	ptr = kaddr + offset;
+	qp = kaddr + offset;
-	gfs2_quota_in(&qp, ptr);
+	value = (s64)be64_to_cpu(qp->qu_value) + change;
-	qp.qu_value += change;
+	qp->qu_value = cpu_to_be64(value);
-	value = qp.qu_value;
+	qd->qd_qb.qb_value = qp->qu_value;
-	gfs2_quota_out(&qp, ptr);
+	if (fdq) {
+		if (fdq->d_fieldmask & FS_DQ_BSOFT) {
+			qp->qu_warn = cpu_to_be64(fdq->d_blk_softlimit);
+			qd->qd_qb.qb_warn = qp->qu_warn;
+		}
+		if (fdq->d_fieldmask & FS_DQ_BHARD) {
+			qp->qu_limit = cpu_to_be64(fdq->d_blk_hardlimit);
+			qd->qd_qb.qb_limit = qp->qu_limit;
+		}
+	}
 	flush_dcache_page(page);
 	kunmap_atomic(kaddr, KM_USER0);
-	err = 0;
+
-	qd->qd_qb.qb_magic = cpu_to_be32(GFS2_MAGIC);
+	err = gfs2_meta_inode_buffer(ip, &dibh);
-	qd->qd_qb.qb_value = cpu_to_be64(value);
+	if (err)
-	((struct gfs2_quota_lvb*)(qd->qd_gl->gl_lvb))->qb_magic = cpu_to_be32(GFS2_MAGIC);
+		goto unlock;
-	((struct gfs2_quota_lvb*)(qd->qd_gl->gl_lvb))->qb_value = cpu_to_be64(value);
+
+	size = loc + sizeof(struct gfs2_quota);
+	if (size > inode->i_size) {
+		ip->i_disksize = size;
+		i_size_write(inode, size);
+	}
+	inode->i_mtime = inode->i_atime = CURRENT_TIME;
+	gfs2_trans_add_bh(ip->i_gl, dibh, 1);
+	gfs2_dinode_out(ip, dibh->b_data);
+	brelse(dibh);
+	mark_inode_dirty(inode);
+
 unlock:
 	unlock_page(page);
 	page_cache_release(page);
@@ -739,9 +742,9 @@ static int do_sync(unsigned int num_qd, struct gfs2_quota_data **qda)
 		return -ENOMEM;
 
 	sort(qda, num_qd, sizeof(struct gfs2_quota_data *), sort_qd, NULL);
+	mutex_lock_nested(&ip->i_inode.i_mutex, I_MUTEX_QUOTA);
 	for (qx = 0; qx < num_qd; qx++) {
-		error = gfs2_glock_nq_init(qda[qx]->qd_gl,
+		error = gfs2_glock_nq_init(qda[qx]->qd_gl, LM_ST_EXCLUSIVE,
-					   LM_ST_EXCLUSIVE,
 					   GL_NOCACHE, &ghs[qx]);
 		if (error)
 			goto out;
@@ -795,9 +798,7 @@ static int do_sync(unsigned int num_qd, struct gfs2_quota_data **qda)
 	for (x = 0; x < num_qd; x++) {
 		qd = qda[x];
 		offset = qd2offset(qd);
-		error = gfs2_adjust_quota(ip, offset, qd->qd_change_sync,
+		error = gfs2_adjust_quota(ip, offset, qd->qd_change_sync, qd, NULL);
-					  (struct gfs2_quota_data *)
-					  qd);
 		if (error)
 			goto out_end_trans;
 
@@ -817,21 +818,44 @@ out_gunlock:
 out:
 	while (qx--)
 		gfs2_glock_dq_uninit(&ghs[qx]);
+	mutex_unlock(&ip->i_inode.i_mutex);
 	kfree(ghs);
 	gfs2_log_flush(ip->i_gl->gl_sbd, ip->i_gl);
 	return error;
 }
 
+static int update_qd(struct gfs2_sbd *sdp, struct gfs2_quota_data *qd)
+{
+	struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
+	struct gfs2_quota q;
+	struct gfs2_quota_lvb *qlvb;
+	loff_t pos;
+	int error;
+
+	memset(&q, 0, sizeof(struct gfs2_quota));
+	pos = qd2offset(qd);
+	error = gfs2_internal_read(ip, NULL, (char *)&q, &pos, sizeof(q));
+	if (error < 0)
+		return error;
+
+	qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lvb;
+	qlvb->qb_magic = cpu_to_be32(GFS2_MAGIC);
+	qlvb->__pad = 0;
+	qlvb->qb_limit = q.qu_limit;
+	qlvb->qb_warn = q.qu_warn;
+	qlvb->qb_value = q.qu_value;
+	qd->qd_qb = *qlvb;
+
+	return 0;
+}
+
 static int do_glock(struct gfs2_quota_data *qd, int force_refresh,
 		    struct gfs2_holder *q_gh)
 {
 	struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
 	struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
 	struct gfs2_holder i_gh;
-	struct gfs2_quota_host q;
-	char buf[sizeof(struct gfs2_quota)];
 	int error;
-	struct gfs2_quota_lvb *qlvb;
 
 restart:
 	error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_SHARED, 0, q_gh);
@@ -841,11 +865,9 @@ restart:
 	qd->qd_qb = *(struct gfs2_quota_lvb *)qd->qd_gl->gl_lvb;
 
 	if (force_refresh || qd->qd_qb.qb_magic != cpu_to_be32(GFS2_MAGIC)) {
-		loff_t pos;
 		gfs2_glock_dq_uninit(q_gh);
-		error = gfs2_glock_nq_init(qd->qd_gl,
+		error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE,
-					   LM_ST_EXCLUSIVE, GL_NOCACHE,
+					   GL_NOCACHE, q_gh);
-					   q_gh);
 		if (error)
 			return error;
 
@@ -853,29 +875,14 @@ restart:
 		if (error)
 			goto fail;
 
-		memset(buf, 0, sizeof(struct gfs2_quota));
+		error = update_qd(sdp, qd);
-		pos = qd2offset(qd);
+		if (error)
-		error = gfs2_internal_read(ip, NULL, buf, &pos,
-					   sizeof(struct gfs2_quota));
-		if (error < 0)
 			goto fail_gunlock;
 
 		gfs2_glock_dq_uninit(&i_gh);
-
+		gfs2_glock_dq_uninit(q_gh);
-		gfs2_quota_in(&q, buf);
+		force_refresh = 0;
-		qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lvb;
+		goto restart;
-		qlvb->qb_magic = cpu_to_be32(GFS2_MAGIC);
-		qlvb->__pad = 0;
-		qlvb->qb_limit = cpu_to_be64(q.qu_limit);
-		qlvb->qb_warn = cpu_to_be64(q.qu_warn);
-		qlvb->qb_value = cpu_to_be64(q.qu_value);
-		qd->qd_qb = *qlvb;
-
-		if (gfs2_glock_is_blocking(qd->qd_gl)) {
-			gfs2_glock_dq_uninit(q_gh);
-			force_refresh = 0;
-			goto restart;
-		}
 	}
 
 	return 0;
@@ -995,7 +1002,7 @@ static int print_message(struct gfs2_quota_data *qd, char *type)
 {
 	struct gfs2_sbd *sdp = qd->qd_gl->gl_sbd;
 
-	printk(KERN_INFO "GFS2: fsid=%s: quota %s for %s %u\r\n",
+	printk(KERN_INFO "GFS2: fsid=%s: quota %s for %s %u\n",
 	       sdp->sd_fsname, type,
 	       (test_bit(QDF_USER, &qd->qd_flags)) ? "user" : "group",
 	       qd->qd_id);
@@ -1032,6 +1039,10 @@ int gfs2_quota_check(struct gfs2_inode *ip, u32 uid, u32 gid)
 
 		if (be64_to_cpu(qd->qd_qb.qb_limit) && (s64)be64_to_cpu(qd->qd_qb.qb_limit) < value) {
 			print_message(qd, "exceeded");
+			quota_send_warning(test_bit(QDF_USER, &qd->qd_flags) ?
+					   USRQUOTA : GRPQUOTA, qd->qd_id,
+					   sdp->sd_vfs->s_dev, QUOTA_NL_BHARDWARN);
+
 			error = -EDQUOT;
 			break;
 		} else if (be64_to_cpu(qd->qd_qb.qb_warn) &&
@@ -1039,6 +1050,9 @@ int gfs2_quota_check(struct gfs2_inode *ip, u32 uid, u32 gid)
 			   time_after_eq(jiffies, qd->qd_last_warn +
 					 gfs2_tune_get(sdp,
 						gt_quota_warn_period) * HZ)) {
+			quota_send_warning(test_bit(QDF_USER, &qd->qd_flags) ?
+					   USRQUOTA : GRPQUOTA, qd->qd_id,
+					   sdp->sd_vfs->s_dev, QUOTA_NL_BSOFTWARN);
 			error = print_message(qd, "warning");
 			qd->qd_last_warn = jiffies;
 		}
@@ -1069,8 +1083,9 @@ void gfs2_quota_change(struct gfs2_inode *ip, s64 change,
 	}
 }
 
-int gfs2_quota_sync(struct gfs2_sbd *sdp)
+int gfs2_quota_sync(struct super_block *sb, int type)
 {
+	struct gfs2_sbd *sdp = sb->s_fs_info;
 	struct gfs2_quota_data **qda;
 	unsigned int max_qd = gfs2_tune_get(sdp, gt_quota_simul_sync);
 	unsigned int num_qd;
@@ -1118,7 +1133,7 @@ int gfs2_quota_refresh(struct gfs2_sbd *sdp, int user, u32 id)
 	struct gfs2_holder q_gh;
 	int error;
 
-	error = qd_get(sdp, user, id, CREATE, &qd);
+	error = qd_get(sdp, user, id, &qd);
 	if (error)
 		return error;
 
@@ -1127,7 +1142,6 @@ int gfs2_quota_refresh(struct gfs2_sbd *sdp, int user, u32 id)
 		gfs2_glock_dq_uninit(&q_gh);
 
 	qd_put(qd);
-
 	return error;
 }
 
@@ -1298,12 +1312,12 @@ static void quotad_error(struct gfs2_sbd *sdp, const char *msg, int error)
 }
 
 static void quotad_check_timeo(struct gfs2_sbd *sdp, const char *msg,
-			       int (*fxn)(struct gfs2_sbd *sdp),
+			       int (*fxn)(struct super_block *sb, int type),
 			       unsigned long t, unsigned long *timeo,
 			       unsigned int *new_timeo)
 {
 	if (t >= *timeo) {
-		int error = fxn(sdp);
+		int error = fxn(sdp->sd_vfs, 0);
 		quotad_error(sdp, msg, error);
 		*timeo = gfs2_tune_get_i(&sdp->sd_tune, new_timeo) * HZ;
 	} else {
@@ -1330,6 +1344,14 @@ static void quotad_check_trunc_list(struct gfs2_sbd *sdp)
 	}
 }
 
+void gfs2_wake_up_statfs(struct gfs2_sbd *sdp) {
+	if (!sdp->sd_statfs_force_sync) {
+		sdp->sd_statfs_force_sync = 1;
+		wake_up(&sdp->sd_quota_wait);
+	}
+}
+
+
 /**
  * gfs2_quotad - Write cached quota changes into the quota file
  * @sdp: Pointer to GFS2 superblock
@@ -1349,8 +1371,15 @@ int gfs2_quotad(void *data)
 	while (!kthread_should_stop()) {
 
 		/* Update the master statfs file */
-		quotad_check_timeo(sdp, "statfs", gfs2_statfs_sync, t,
+		if (sdp->sd_statfs_force_sync) {
-				   &statfs_timeo, &tune->gt_statfs_quantum);
+			int error = gfs2_statfs_sync(sdp->sd_vfs, 0);
+			quotad_error(sdp, "statfs", error);
+			statfs_timeo = gfs2_tune_get(sdp, gt_statfs_quantum) * HZ;
+		}
+		else
+			quotad_check_timeo(sdp, "statfs", gfs2_statfs_sync, t,
+				   	   &statfs_timeo,
+					   &tune->gt_statfs_quantum);
 
 		/* Update quota file */
 		quotad_check_timeo(sdp, "sync", gfs2_quota_sync, t,
@@ -1367,7 +1396,7 @@ int gfs2_quotad(void *data)
 		spin_lock(&sdp->sd_trunc_lock);
 		empty = list_empty(&sdp->sd_trunc_list);
 		spin_unlock(&sdp->sd_trunc_lock);
-		if (empty)
+		if (empty && !sdp->sd_statfs_force_sync)
 			t -= schedule_timeout(t);
 		else
 			t = 0;
@@ -1377,3 +1406,181 @@ int gfs2_quotad(void *data)
 	return 0;
 }
 
+static int gfs2_quota_get_xstate(struct super_block *sb,
+				 struct fs_quota_stat *fqs)
+{
+	struct gfs2_sbd *sdp = sb->s_fs_info;
+
+	memset(fqs, 0, sizeof(struct fs_quota_stat));
+	fqs->qs_version = FS_QSTAT_VERSION;
+	if (sdp->sd_args.ar_quota == GFS2_QUOTA_ON)
+		fqs->qs_flags = (XFS_QUOTA_UDQ_ENFD | XFS_QUOTA_GDQ_ENFD);
+	else if (sdp->sd_args.ar_quota == GFS2_QUOTA_ACCOUNT)
+		fqs->qs_flags = (XFS_QUOTA_UDQ_ACCT | XFS_QUOTA_GDQ_ACCT);
+	if (sdp->sd_quota_inode) {
+		fqs->qs_uquota.qfs_ino = GFS2_I(sdp->sd_quota_inode)->i_no_addr;
+		fqs->qs_uquota.qfs_nblks = sdp->sd_quota_inode->i_blocks;
+	}
+	fqs->qs_uquota.qfs_nextents = 1; /* unsupported */
+	fqs->qs_gquota = fqs->qs_uquota; /* its the same inode in both cases */
+	fqs->qs_incoredqs = atomic_read(&qd_lru_count);
+	return 0;
+}
+
+static int gfs2_xquota_get(struct super_block *sb, int type, qid_t id,
+			   struct fs_disk_quota *fdq)
+{
+	struct gfs2_sbd *sdp = sb->s_fs_info;
+	struct gfs2_quota_lvb *qlvb;
+	struct gfs2_quota_data *qd;
+	struct gfs2_holder q_gh;
+	int error;
+
+	memset(fdq, 0, sizeof(struct fs_disk_quota));
+
+	if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
+		return -ESRCH; /* Crazy XFS error code */
+
+	if (type == USRQUOTA)
+		type = QUOTA_USER;
+	else if (type == GRPQUOTA)
+		type = QUOTA_GROUP;
+	else
+		return -EINVAL;
+
+	error = qd_get(sdp, type, id, &qd);
+	if (error)
+		return error;
+	error = do_glock(qd, FORCE, &q_gh);
+	if (error)
+		goto out;
+
+	qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lvb;
+	fdq->d_version = FS_DQUOT_VERSION;
+	fdq->d_flags = (type == QUOTA_USER) ? XFS_USER_QUOTA : XFS_GROUP_QUOTA;
+	fdq->d_id = id;
+	fdq->d_blk_hardlimit = be64_to_cpu(qlvb->qb_limit);
+	fdq->d_blk_softlimit = be64_to_cpu(qlvb->qb_warn);
+	fdq->d_bcount = be64_to_cpu(qlvb->qb_value);
+
+	gfs2_glock_dq_uninit(&q_gh);
+out:
+	qd_put(qd);
+	return error;
+}
+
+/* GFS2 only supports a subset of the XFS fields */
+#define GFS2_FIELDMASK (FS_DQ_BSOFT|FS_DQ_BHARD)
+
+static int gfs2_xquota_set(struct super_block *sb, int type, qid_t id,
+			   struct fs_disk_quota *fdq)
+{
+	struct gfs2_sbd *sdp = sb->s_fs_info;
+	struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
+	struct gfs2_quota_data *qd;
+	struct gfs2_holder q_gh, i_gh;
+	unsigned int data_blocks, ind_blocks;
+	unsigned int blocks = 0;
+	int alloc_required;
+	struct gfs2_alloc *al;
+	loff_t offset;
+	int error;
+
+	if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
+		return -ESRCH; /* Crazy XFS error code */
+
+	switch(type) {
+	case USRQUOTA:
+		type = QUOTA_USER;
+		if (fdq->d_flags != XFS_USER_QUOTA)
+			return -EINVAL;
+		break;
+	case GRPQUOTA:
+		type = QUOTA_GROUP;
+		if (fdq->d_flags != XFS_GROUP_QUOTA)
+			return -EINVAL;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	if (fdq->d_fieldmask & ~GFS2_FIELDMASK)
+		return -EINVAL;
+	if (fdq->d_id != id)
+		return -EINVAL;
+
+	error = qd_get(sdp, type, id, &qd);
+	if (error)
+		return error;
+
+	mutex_lock(&ip->i_inode.i_mutex);
+	error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE, 0, &q_gh);
+	if (error)
+		goto out_put;
+	error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
+	if (error)
+		goto out_q;
+
+	/* Check for existing entry, if none then alloc new blocks */
+	error = update_qd(sdp, qd);
+	if (error)
+		goto out_i;
+
+	/* If nothing has changed, this is a no-op */
+	if ((fdq->d_fieldmask & FS_DQ_BSOFT) &&
+	    (fdq->d_blk_softlimit == be64_to_cpu(qd->qd_qb.qb_warn)))
+		fdq->d_fieldmask ^= FS_DQ_BSOFT;
+	if ((fdq->d_fieldmask & FS_DQ_BHARD) &&
+	    (fdq->d_blk_hardlimit == be64_to_cpu(qd->qd_qb.qb_limit)))
+		fdq->d_fieldmask ^= FS_DQ_BHARD;
+	if (fdq->d_fieldmask == 0)
+		goto out_i;
+
+	offset = qd2offset(qd);
+	error = gfs2_write_alloc_required(ip, offset, sizeof(struct gfs2_quota),
+					  &alloc_required);
+	if (error)
+		goto out_i;
+	if (alloc_required) {
+		al = gfs2_alloc_get(ip);
+		if (al == NULL)
+			goto out_i;
+		gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota),
+				       &data_blocks, &ind_blocks);
+		blocks = al->al_requested = 1 + data_blocks + ind_blocks;
+		error = gfs2_inplace_reserve(ip);
+		if (error)
+			goto out_alloc;
+	}
+
+	error = gfs2_trans_begin(sdp, blocks + RES_DINODE + 1, 0);
+	if (error)
+		goto out_release;
+
+	/* Apply changes */
+	error = gfs2_adjust_quota(ip, offset, 0, qd, fdq);
+
+	gfs2_trans_end(sdp);
+out_release:
+	if (alloc_required) {
+		gfs2_inplace_release(ip);
+out_alloc:
+		gfs2_alloc_put(ip);
+	}
+out_i:
+	gfs2_glock_dq_uninit(&i_gh);
+out_q:
+	gfs2_glock_dq_uninit(&q_gh);
+out_put:
+	mutex_unlock(&ip->i_inode.i_mutex);
+	qd_put(qd);
+	return error;
+}
+
+const struct quotactl_ops gfs2_quotactl_ops = {
+	.quota_sync     = gfs2_quota_sync,
+	.get_xstate     = gfs2_quota_get_xstate,
+	.get_xquota	= gfs2_xquota_get,
+	.set_xquota	= gfs2_xquota_set,
+};
+

fs/gfs2/quota.h

@@ -25,13 +25,15 @@ extern int gfs2_quota_check(struct gfs2_inode *ip, u32 uid, u32 gid);
 extern void gfs2_quota_change(struct gfs2_inode *ip, s64 change,
 			      u32 uid, u32 gid);
 
-extern int gfs2_quota_sync(struct gfs2_sbd *sdp);
+extern int gfs2_quota_sync(struct super_block *sb, int type);
 extern int gfs2_quota_refresh(struct gfs2_sbd *sdp, int user, u32 id);
 
 extern int gfs2_quota_init(struct gfs2_sbd *sdp);
 extern void gfs2_quota_cleanup(struct gfs2_sbd *sdp);
 extern int gfs2_quotad(void *data);
 
+extern void gfs2_wake_up_statfs(struct gfs2_sbd *sdp);
+
 static inline int gfs2_quota_lock_check(struct gfs2_inode *ip)
 {
 	struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
@@ -50,5 +52,6 @@ static inline int gfs2_quota_lock_check(struct gfs2_inode *ip)
 }
 
 extern int gfs2_shrink_qd_memory(int nr, gfp_t gfp_mask);
+extern const struct quotactl_ops gfs2_quotactl_ops;
 
 #endif /* __QUOTA_DOT_H__ */

fs/gfs2/recovery.c

@@ -410,7 +410,9 @@ static int clean_journal(struct gfs2_jdesc *jd, struct gfs2_log_header_host *hea
 	memset(lh, 0, sizeof(struct gfs2_log_header));
 	lh->lh_header.mh_magic = cpu_to_be32(GFS2_MAGIC);
 	lh->lh_header.mh_type = cpu_to_be32(GFS2_METATYPE_LH);
+	lh->lh_header.__pad0 = cpu_to_be64(0);
 	lh->lh_header.mh_format = cpu_to_be32(GFS2_FORMAT_LH);
+	lh->lh_header.mh_jid = cpu_to_be32(sdp->sd_jdesc->jd_jid);
 	lh->lh_sequence = cpu_to_be64(head->lh_sequence + 1);
 	lh->lh_flags = cpu_to_be32(GFS2_LOG_HEAD_UNMOUNT);
 	lh->lh_blkno = cpu_to_be32(lblock);

fs/gfs2/rgrp.c

@@ -1710,11 +1710,16 @@ int gfs2_check_blk_type(struct gfs2_sbd *sdp, u64 no_addr, unsigned int type)
 {
 	struct gfs2_rgrpd *rgd;
 	struct gfs2_holder ri_gh, rgd_gh;
+	struct gfs2_inode *ip = GFS2_I(sdp->sd_rindex);
+	int ri_locked = 0;
 	int error;
 
-	error = gfs2_rindex_hold(sdp, &ri_gh);
+	if (!gfs2_glock_is_locked_by_me(ip->i_gl)) {
-	if (error)
+		error = gfs2_rindex_hold(sdp, &ri_gh);
-		goto fail;
+		if (error)
+			goto fail;
+		ri_locked = 1;
+	}
 
 	error = -EINVAL;
 	rgd = gfs2_blk2rgrpd(sdp, no_addr);
@@ -1730,7 +1735,8 @@ int gfs2_check_blk_type(struct gfs2_sbd *sdp, u64 no_addr, unsigned int type)
 
 	gfs2_glock_dq_uninit(&rgd_gh);
 fail_rindex:
-	gfs2_glock_dq_uninit(&ri_gh);
+	if (ri_locked)
+		gfs2_glock_dq_uninit(&ri_gh);
 fail:
 	return error;
 }

fs/gfs2/super.c

@@ -70,6 +70,11 @@ enum {
 	Opt_commit,
 	Opt_err_withdraw,
 	Opt_err_panic,
+	Opt_statfs_quantum,
+	Opt_statfs_percent,
+	Opt_quota_quantum,
+	Opt_barrier,
+	Opt_nobarrier,
 	Opt_error,
 };
 
@@ -101,18 +106,23 @@ static const match_table_t tokens = {
 	{Opt_commit, "commit=%d"},
 	{Opt_err_withdraw, "errors=withdraw"},
 	{Opt_err_panic, "errors=panic"},
+	{Opt_statfs_quantum, "statfs_quantum=%d"},
+	{Opt_statfs_percent, "statfs_percent=%d"},
+	{Opt_quota_quantum, "quota_quantum=%d"},
+	{Opt_barrier, "barrier"},
+	{Opt_nobarrier, "nobarrier"},
 	{Opt_error, NULL}
 };
 
 /**
  * gfs2_mount_args - Parse mount options
- * @sdp:
+ * @args: The structure into which the parsed options will be written
- * @data:
+ * @options: The options to parse
  *
  * Return: errno
  */
 
-int gfs2_mount_args(struct gfs2_sbd *sdp, struct gfs2_args *args, char *options)
+int gfs2_mount_args(struct gfs2_args *args, char *options)
 {
 	char *o;
 	int token;
@@ -157,7 +167,7 @@ int gfs2_mount_args(struct gfs2_sbd *sdp, struct gfs2_args *args, char *options)
 			break;
 		case Opt_debug:
 			if (args->ar_errors == GFS2_ERRORS_PANIC) {
-				fs_info(sdp, "-o debug and -o errors=panic "
+				printk(KERN_WARNING "GFS2: -o debug and -o errors=panic "
 				       "are mutually exclusive.\n");
 				return -EINVAL;
 			}
@@ -210,7 +220,29 @@ int gfs2_mount_args(struct gfs2_sbd *sdp, struct gfs2_args *args, char *options)
 		case Opt_commit:
 			rv = match_int(&tmp[0], &args->ar_commit);
 			if (rv || args->ar_commit <= 0) {
-				fs_info(sdp, "commit mount option requires a positive numeric argument\n");
+				printk(KERN_WARNING "GFS2: commit mount option requires a positive numeric argument\n");
+				return rv ? rv : -EINVAL;
+			}
+			break;
+		case Opt_statfs_quantum:
+			rv = match_int(&tmp[0], &args->ar_statfs_quantum);
+			if (rv || args->ar_statfs_quantum < 0) {
+				printk(KERN_WARNING "GFS2: statfs_quantum mount option requires a non-negative numeric argument\n");
+				return rv ? rv : -EINVAL;
+			}
+			break;
+		case Opt_quota_quantum:
+			rv = match_int(&tmp[0], &args->ar_quota_quantum);
+			if (rv || args->ar_quota_quantum <= 0) {
+				printk(KERN_WARNING "GFS2: quota_quantum mount option requires a positive numeric argument\n");
+				return rv ? rv : -EINVAL;
+			}
+			break;
+		case Opt_statfs_percent:
+			rv = match_int(&tmp[0], &args->ar_statfs_percent);
+			if (rv || args->ar_statfs_percent < 0 ||
+			    args->ar_statfs_percent > 100) {
+				printk(KERN_WARNING "statfs_percent mount option requires a numeric argument between 0 and 100\n");
 				return rv ? rv : -EINVAL;
 			}
 			break;
@@ -219,15 +251,21 @@ int gfs2_mount_args(struct gfs2_sbd *sdp, struct gfs2_args *args, char *options)
 			break;
 		case Opt_err_panic:
 			if (args->ar_debug) {
-				fs_info(sdp, "-o debug and -o errors=panic "
+				printk(KERN_WARNING "GFS2: -o debug and -o errors=panic "
 					"are mutually exclusive.\n");
 				return -EINVAL;
 			}
 			args->ar_errors = GFS2_ERRORS_PANIC;
 			break;
+		case Opt_barrier:
+			args->ar_nobarrier = 0;
+			break;
+		case Opt_nobarrier:
+			args->ar_nobarrier = 1;
+			break;
 		case Opt_error:
 		default:
-			fs_info(sdp, "invalid mount option: %s\n", o);
+			printk(KERN_WARNING "GFS2: invalid mount option: %s\n", o);
 			return -EINVAL;
 		}
 	}
@@ -442,7 +480,10 @@ void gfs2_statfs_change(struct gfs2_sbd *sdp, s64 total, s64 free,
 {
 	struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode);
 	struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local;
+	struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master;
 	struct buffer_head *l_bh;
+	s64 x, y;
+	int need_sync = 0;
 	int error;
 
 	error = gfs2_meta_inode_buffer(l_ip, &l_bh);
@@ -456,9 +497,17 @@ void gfs2_statfs_change(struct gfs2_sbd *sdp, s64 total, s64 free,
 	l_sc->sc_free += free;
 	l_sc->sc_dinodes += dinodes;
 	gfs2_statfs_change_out(l_sc, l_bh->b_data + sizeof(struct gfs2_dinode));
+	if (sdp->sd_args.ar_statfs_percent) {
+		x = 100 * l_sc->sc_free;
+		y = m_sc->sc_free * sdp->sd_args.ar_statfs_percent;
+		if (x >= y || x <= -y)
+			need_sync = 1;
+	}
 	spin_unlock(&sdp->sd_statfs_spin);
 
 	brelse(l_bh);
+	if (need_sync)
+		gfs2_wake_up_statfs(sdp);
 }
 
 void update_statfs(struct gfs2_sbd *sdp, struct buffer_head *m_bh,
@@ -484,8 +533,9 @@ void update_statfs(struct gfs2_sbd *sdp, struct buffer_head *m_bh,
 	gfs2_statfs_change_out(m_sc, m_bh->b_data + sizeof(struct gfs2_dinode));
 }
 
-int gfs2_statfs_sync(struct gfs2_sbd *sdp)
+int gfs2_statfs_sync(struct super_block *sb, int type)
 {
+	struct gfs2_sbd *sdp = sb->s_fs_info;
 	struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode);
 	struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode);
 	struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master;
@@ -521,6 +571,7 @@ int gfs2_statfs_sync(struct gfs2_sbd *sdp)
 		goto out_bh2;
 
 	update_statfs(sdp, m_bh, l_bh);
+	sdp->sd_statfs_force_sync = 0;
 
 	gfs2_trans_end(sdp);
 
@@ -712,8 +763,8 @@ static int gfs2_make_fs_ro(struct gfs2_sbd *sdp)
 	int error;
 
 	flush_workqueue(gfs2_delete_workqueue);
-	gfs2_quota_sync(sdp);
+	gfs2_quota_sync(sdp->sd_vfs, 0);
-	gfs2_statfs_sync(sdp);
+	gfs2_statfs_sync(sdp->sd_vfs, 0);
 
 	error = gfs2_glock_nq_init(sdp->sd_trans_gl, LM_ST_SHARED, GL_NOCACHE,
 				   &t_gh);
@@ -1061,8 +1112,13 @@ static int gfs2_remount_fs(struct super_block *sb, int *flags, char *data)
 
 	spin_lock(&gt->gt_spin);
 	args.ar_commit = gt->gt_log_flush_secs;
+	args.ar_quota_quantum = gt->gt_quota_quantum;
+	if (gt->gt_statfs_slow)
+		args.ar_statfs_quantum = 0;
+	else
+		args.ar_statfs_quantum = gt->gt_statfs_quantum;
 	spin_unlock(&gt->gt_spin);
-	error = gfs2_mount_args(sdp, &args, data);
+	error = gfs2_mount_args(&args, data);
 	if (error)
 		return error;
 
@@ -1097,8 +1153,21 @@ static int gfs2_remount_fs(struct super_block *sb, int *flags, char *data)
 		sb->s_flags |= MS_POSIXACL;
 	else
 		sb->s_flags &= ~MS_POSIXACL;
+	if (sdp->sd_args.ar_nobarrier)
+		set_bit(SDF_NOBARRIERS, &sdp->sd_flags);
+	else
+		clear_bit(SDF_NOBARRIERS, &sdp->sd_flags);
 	spin_lock(&gt->gt_spin);
 	gt->gt_log_flush_secs = args.ar_commit;
+	gt->gt_quota_quantum = args.ar_quota_quantum;
+	if (args.ar_statfs_quantum) {
+		gt->gt_statfs_slow = 0;
+		gt->gt_statfs_quantum = args.ar_statfs_quantum;
+	}
+	else {
+		gt->gt_statfs_slow = 1;
+		gt->gt_statfs_quantum = 30;
+	}
 	spin_unlock(&gt->gt_spin);
 
 	gfs2_online_uevent(sdp);
@@ -1179,7 +1248,7 @@ static int gfs2_show_options(struct seq_file *s, struct vfsmount *mnt)
 {
 	struct gfs2_sbd *sdp = mnt->mnt_sb->s_fs_info;
 	struct gfs2_args *args = &sdp->sd_args;
-	int lfsecs;
+	int val;
 
 	if (is_ancestor(mnt->mnt_root, sdp->sd_master_dir))
 		seq_printf(s, ",meta");
@@ -1240,9 +1309,17 @@ static int gfs2_show_options(struct seq_file *s, struct vfsmount *mnt)
 	}
 	if (args->ar_discard)
 		seq_printf(s, ",discard");
-	lfsecs = sdp->sd_tune.gt_log_flush_secs;
+	val = sdp->sd_tune.gt_log_flush_secs;
-	if (lfsecs != 60)
+	if (val != 60)
-		seq_printf(s, ",commit=%d", lfsecs);
+		seq_printf(s, ",commit=%d", val);
+	val = sdp->sd_tune.gt_statfs_quantum;
+	if (val != 30)
+		seq_printf(s, ",statfs_quantum=%d", val);
+	val = sdp->sd_tune.gt_quota_quantum;
+	if (val != 60)
+		seq_printf(s, ",quota_quantum=%d", val);
+	if (args->ar_statfs_percent)
+		seq_printf(s, ",statfs_percent=%d", args->ar_statfs_percent);
 	if (args->ar_errors != GFS2_ERRORS_DEFAULT) {
 		const char *state;
 
@@ -1259,6 +1336,9 @@ static int gfs2_show_options(struct seq_file *s, struct vfsmount *mnt)
 		}
 		seq_printf(s, ",errors=%s", state);
 	}
+	if (test_bit(SDF_NOBARRIERS, &sdp->sd_flags))
+		seq_printf(s, ",nobarrier");
+
 	return 0;
 }
 

fs/gfs2/super.h

@@ -27,7 +27,7 @@ static inline unsigned int gfs2_jindex_size(struct gfs2_sbd *sdp)
 
 extern void gfs2_jindex_free(struct gfs2_sbd *sdp);
 
-extern int gfs2_mount_args(struct gfs2_sbd *sdp, struct gfs2_args *args, char *data);
+extern int gfs2_mount_args(struct gfs2_args *args, char *data);
 
 extern struct gfs2_jdesc *gfs2_jdesc_find(struct gfs2_sbd *sdp, unsigned int jid);
 extern int gfs2_jdesc_check(struct gfs2_jdesc *jd);
@@ -44,7 +44,7 @@ extern void gfs2_statfs_change_in(struct gfs2_statfs_change_host *sc,
 				  const void *buf);
 extern void update_statfs(struct gfs2_sbd *sdp, struct buffer_head *m_bh,
 			  struct buffer_head *l_bh);
-extern int gfs2_statfs_sync(struct gfs2_sbd *sdp);
+extern int gfs2_statfs_sync(struct super_block *sb, int type);
 
 extern int gfs2_freeze_fs(struct gfs2_sbd *sdp);
 extern void gfs2_unfreeze_fs(struct gfs2_sbd *sdp);

fs/gfs2/sys.c

@@ -158,7 +158,7 @@ static ssize_t statfs_sync_store(struct gfs2_sbd *sdp, const char *buf,
 	if (simple_strtol(buf, NULL, 0) != 1)
 		return -EINVAL;
 
-	gfs2_statfs_sync(sdp);
+	gfs2_statfs_sync(sdp->sd_vfs, 0);
 	return len;
 }
 
@@ -171,13 +171,14 @@ static ssize_t quota_sync_store(struct gfs2_sbd *sdp, const char *buf,
 	if (simple_strtol(buf, NULL, 0) != 1)
 		return -EINVAL;
 
-	gfs2_quota_sync(sdp);
+	gfs2_quota_sync(sdp->sd_vfs, 0);
 	return len;
 }
 
 static ssize_t quota_refresh_user_store(struct gfs2_sbd *sdp, const char *buf,
 					size_t len)
 {
+	int error;
 	u32 id;
 
 	if (!capable(CAP_SYS_ADMIN))
@@ -185,13 +186,14 @@ static ssize_t quota_refresh_user_store(struct gfs2_sbd *sdp, const char *buf,
 
 	id = simple_strtoul(buf, NULL, 0);
 
-	gfs2_quota_refresh(sdp, 1, id);
+	error = gfs2_quota_refresh(sdp, 1, id);
-	return len;
+	return error ? error : len;
 }
 
 static ssize_t quota_refresh_group_store(struct gfs2_sbd *sdp, const char *buf,
 					 size_t len)
 {
+	int error;
 	u32 id;
 
 	if (!capable(CAP_SYS_ADMIN))
@@ -199,8 +201,8 @@ static ssize_t quota_refresh_group_store(struct gfs2_sbd *sdp, const char *buf,
 
 	id = simple_strtoul(buf, NULL, 0);
 
-	gfs2_quota_refresh(sdp, 0, id);
+	error = gfs2_quota_refresh(sdp, 0, id);
-	return len;
+	return error ? error : len;
 }
 
 static ssize_t demote_rq_store(struct gfs2_sbd *sdp, const char *buf, size_t len)

fs/gfs2/xattr.c

@@ -186,8 +186,8 @@ static int ea_find_i(struct gfs2_inode *ip, struct buffer_head *bh,
 	return 0;
 }
 
-int gfs2_ea_find(struct gfs2_inode *ip, int type, const char *name,
+static int gfs2_ea_find(struct gfs2_inode *ip, int type, const char *name,
-		 struct gfs2_ea_location *el)
+			struct gfs2_ea_location *el)
 {
 	struct ea_find ef;
 	int error;
@@ -516,8 +516,8 @@ out:
 	return error;
 }
 
-int gfs2_ea_get_copy(struct gfs2_inode *ip, struct gfs2_ea_location *el,
+static int gfs2_ea_get_copy(struct gfs2_inode *ip, struct gfs2_ea_location *el,
-		     char *data, size_t size)
+			    char *data, size_t size)
 {
 	int ret;
 	size_t len = GFS2_EA_DATA_LEN(el->el_ea);
@@ -534,6 +534,36 @@ int gfs2_ea_get_copy(struct gfs2_inode *ip, struct gfs2_ea_location *el,
 	return len;
 }
 
+int gfs2_xattr_acl_get(struct gfs2_inode *ip, const char *name, char **ppdata)
+{
+	struct gfs2_ea_location el;
+	int error;
+	int len;
+	char *data;
+
+	error = gfs2_ea_find(ip, GFS2_EATYPE_SYS, name, &el);
+	if (error)
+		return error;
+	if (!el.el_ea)
+		goto out;
+	if (!GFS2_EA_DATA_LEN(el.el_ea))
+		goto out;
+
+	len = GFS2_EA_DATA_LEN(el.el_ea);
+	data = kmalloc(len, GFP_NOFS);
+	error = -ENOMEM;
+	if (data == NULL)
+		goto out;
+
+	error = gfs2_ea_get_copy(ip, &el, data, len);
+	if (error == 0)
+		error = len;
+	*ppdata = data;
+out:
+	brelse(el.el_bh);
+	return error;
+}
+
 /**
  * gfs2_xattr_get - Get a GFS2 extended attribute
  * @inode: The inode
@@ -1259,22 +1289,26 @@ fail:
 	return error;
 }
 
-int gfs2_ea_acl_chmod(struct gfs2_inode *ip, struct gfs2_ea_location *el,
+int gfs2_xattr_acl_chmod(struct gfs2_inode *ip, struct iattr *attr, char *data)
-		      struct iattr *attr, char *data)
 {
+	struct gfs2_ea_location el;
 	struct buffer_head *dibh;
 	int error;
 
-	if (GFS2_EA_IS_STUFFED(el->el_ea)) {
+	error = gfs2_ea_find(ip, GFS2_EATYPE_SYS, GFS2_POSIX_ACL_ACCESS, &el);
+	if (error)
+		return error;
+
+	if (GFS2_EA_IS_STUFFED(el.el_ea)) {
 		error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + RES_EATTR, 0);
 		if (error)
 			return error;
 
-		gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1);
+		gfs2_trans_add_bh(ip->i_gl, el.el_bh, 1);
-		memcpy(GFS2_EA2DATA(el->el_ea), data,
+		memcpy(GFS2_EA2DATA(el.el_ea), data,
-		       GFS2_EA_DATA_LEN(el->el_ea));
+		       GFS2_EA_DATA_LEN(el.el_ea));
 	} else
-		error = ea_acl_chmod_unstuffed(ip, el->el_ea, data);
+		error = ea_acl_chmod_unstuffed(ip, el.el_ea, data);
 
 	if (error)
 		return error;
@@ -1507,18 +1541,6 @@ static int gfs2_xattr_user_set(struct inode *inode, const char *name,
 	return gfs2_xattr_set(inode, GFS2_EATYPE_USR, name, value, size, flags);
 }
 
-static int gfs2_xattr_system_get(struct inode *inode, const char *name,
-				 void *buffer, size_t size)
-{
-	return gfs2_xattr_get(inode, GFS2_EATYPE_SYS, name, buffer, size);
-}
-
-static int gfs2_xattr_system_set(struct inode *inode, const char *name,
-				 const void *value, size_t size, int flags)
-{
-	return gfs2_xattr_set(inode, GFS2_EATYPE_SYS, name, value, size, flags);
-}
-
 static int gfs2_xattr_security_get(struct inode *inode, const char *name,
 				   void *buffer, size_t size)
 {
@@ -1543,12 +1565,6 @@ static struct xattr_handler gfs2_xattr_security_handler = {
 	.set    = gfs2_xattr_security_set,
 };
 
-static struct xattr_handler gfs2_xattr_system_handler = {
-	.prefix = XATTR_SYSTEM_PREFIX,
-	.get    = gfs2_xattr_system_get,
-	.set    = gfs2_xattr_system_set,
-};
-
 struct xattr_handler *gfs2_xattr_handlers[] = {
 	&gfs2_xattr_user_handler,
 	&gfs2_xattr_security_handler,

fs/gfs2/xattr.h

@@ -62,11 +62,7 @@ extern int gfs2_ea_dealloc(struct gfs2_inode *ip);
 
 /* Exported to acl.c */
 
-extern int gfs2_ea_find(struct gfs2_inode *ip, int type, const char *name,
+extern int gfs2_xattr_acl_get(struct gfs2_inode *ip, const char *name, char **data);
-			struct gfs2_ea_location *el);
+extern int gfs2_xattr_acl_chmod(struct gfs2_inode *ip, struct iattr *attr, char *data);
-extern int gfs2_ea_get_copy(struct gfs2_inode *ip, struct gfs2_ea_location *el,
-			    char *data, size_t size);
-extern int gfs2_ea_acl_chmod(struct gfs2_inode *ip, struct gfs2_ea_location *el,
-			     struct iattr *attr, char *data);
 
 #endif /* __EATTR_DOT_H__ */

fs/quota/Kconfig

@@ -17,7 +17,7 @@ config QUOTA
 
 config QUOTA_NETLINK_INTERFACE
 	bool "Report quota messages through netlink interface"
-	depends on QUOTA && NET
+	depends on QUOTACTL && NET
 	help
 	  If you say Y here, quota warnings (about exceeding softlimit, reaching
 	  hardlimit, etc.) will be reported through netlink interface. If unsure,

fs/quota/dquot.c

@@ -77,10 +77,6 @@
 #include <linux/capability.h>
 #include <linux/quotaops.h>
 #include <linux/writeback.h> /* for inode_lock, oddly enough.. */
-#ifdef CONFIG_QUOTA_NETLINK_INTERFACE
-#include <net/netlink.h>
-#include <net/genetlink.h>
-#endif
 
 #include <asm/uaccess.h>
 
@@ -1071,73 +1067,6 @@ static void print_warning(struct dquot *dquot, const int warntype)
 }
 #endif
 
-#ifdef CONFIG_QUOTA_NETLINK_INTERFACE
-
-/* Netlink family structure for quota */
-static struct genl_family quota_genl_family = {
-	.id = GENL_ID_GENERATE,
-	.hdrsize = 0,
-	.name = "VFS_DQUOT",
-	.version = 1,
-	.maxattr = QUOTA_NL_A_MAX,
-};
-
-/* Send warning to userspace about user which exceeded quota */
-static void send_warning(const struct dquot *dquot, const char warntype)
-{
-	static atomic_t seq;
-	struct sk_buff *skb;
-	void *msg_head;
-	int ret;
-	int msg_size = 4 * nla_total_size(sizeof(u32)) +
-		       2 * nla_total_size(sizeof(u64));
-
-	/* We have to allocate using GFP_NOFS as we are called from a
-	 * filesystem performing write and thus further recursion into
-	 * the fs to free some data could cause deadlocks. */
-	skb = genlmsg_new(msg_size, GFP_NOFS);
-	if (!skb) {
-		printk(KERN_ERR
-		  "VFS: Not enough memory to send quota warning.\n");
-		return;
-	}
-	msg_head = genlmsg_put(skb, 0, atomic_add_return(1, &seq),
-			&quota_genl_family, 0, QUOTA_NL_C_WARNING);
-	if (!msg_head) {
-		printk(KERN_ERR
-		  "VFS: Cannot store netlink header in quota warning.\n");
-		goto err_out;
-	}
-	ret = nla_put_u32(skb, QUOTA_NL_A_QTYPE, dquot->dq_type);
-	if (ret)
-		goto attr_err_out;
-	ret = nla_put_u64(skb, QUOTA_NL_A_EXCESS_ID, dquot->dq_id);
-	if (ret)
-		goto attr_err_out;
-	ret = nla_put_u32(skb, QUOTA_NL_A_WARNING, warntype);
-	if (ret)
-		goto attr_err_out;
-	ret = nla_put_u32(skb, QUOTA_NL_A_DEV_MAJOR,
-		MAJOR(dquot->dq_sb->s_dev));
-	if (ret)
-		goto attr_err_out;
-	ret = nla_put_u32(skb, QUOTA_NL_A_DEV_MINOR,
-		MINOR(dquot->dq_sb->s_dev));
-	if (ret)
-		goto attr_err_out;
-	ret = nla_put_u64(skb, QUOTA_NL_A_CAUSED_ID, current_uid());
-	if (ret)
-		goto attr_err_out;
-	genlmsg_end(skb, msg_head);
-
-	genlmsg_multicast(skb, 0, quota_genl_family.id, GFP_NOFS);
-	return;
-attr_err_out:
-	printk(KERN_ERR "VFS: Not enough space to compose quota message!\n");
-err_out:
-	kfree_skb(skb);
-}
-#endif
 /*
  * Write warnings to the console and send warning messages over netlink.
  *
@@ -1145,18 +1074,20 @@ err_out:
  */
 static void flush_warnings(struct dquot *const *dquots, char *warntype)
 {
+	struct dquot *dq;
 	int i;
 
-	for (i = 0; i < MAXQUOTAS; i++)
+	for (i = 0; i < MAXQUOTAS; i++) {
-		if (dquots[i] && warntype[i] != QUOTA_NL_NOWARN &&
+		dq = dquots[i];
-		    !warning_issued(dquots[i], warntype[i])) {
+		if (dq && warntype[i] != QUOTA_NL_NOWARN &&
+		    !warning_issued(dq, warntype[i])) {
 #ifdef CONFIG_PRINT_QUOTA_WARNING
-			print_warning(dquots[i], warntype[i]);
+			print_warning(dq, warntype[i]);
-#endif
-#ifdef CONFIG_QUOTA_NETLINK_INTERFACE
-			send_warning(dquots[i], warntype[i]);
 #endif
+			quota_send_warning(dq->dq_type, dq->dq_id,
+					   dq->dq_sb->s_dev, warntype[i]);
 		}
+	}
 }
 
 static int ignore_hardlimit(struct dquot *dquot)
@@ -2607,12 +2538,6 @@ static int __init dquot_init(void)
 
 	register_shrinker(&dqcache_shrinker);
 
-#ifdef CONFIG_QUOTA_NETLINK_INTERFACE
-	if (genl_register_family(&quota_genl_family) != 0)
-		printk(KERN_ERR
-		       "VFS: Failed to create quota netlink interface.\n");
-#endif
-
 	return 0;
 }
 module_init(dquot_init);

fs/quota/quota.c

@@ -18,6 +18,8 @@
 #include <linux/capability.h>
 #include <linux/quotaops.h>
 #include <linux/types.h>
+#include <net/netlink.h>
+#include <net/genetlink.h>
 
 /* Check validity of generic quotactl commands */
 static int generic_quotactl_valid(struct super_block *sb, int type, int cmd,
@@ -525,3 +527,94 @@ asmlinkage long sys32_quotactl(unsigned int cmd, const char __user *special,
 	return ret;
 }
 #endif
+
+
+#ifdef CONFIG_QUOTA_NETLINK_INTERFACE
+
+/* Netlink family structure for quota */
+static struct genl_family quota_genl_family = {
+	.id = GENL_ID_GENERATE,
+	.hdrsize = 0,
+	.name = "VFS_DQUOT",
+	.version = 1,
+	.maxattr = QUOTA_NL_A_MAX,
+};
+
+/**
+ * quota_send_warning - Send warning to userspace about exceeded quota
+ * @type: The quota type: USRQQUOTA, GRPQUOTA,...
+ * @id: The user or group id of the quota that was exceeded
+ * @dev: The device on which the fs is mounted (sb->s_dev)
+ * @warntype: The type of the warning: QUOTA_NL_...
+ *
+ * This can be used by filesystems (including those which don't use
+ * dquot) to send a message to userspace relating to quota limits.
+ *
+ */
+
+void quota_send_warning(short type, unsigned int id, dev_t dev,
+			const char warntype)
+{
+	static atomic_t seq;
+	struct sk_buff *skb;
+	void *msg_head;
+	int ret;
+	int msg_size = 4 * nla_total_size(sizeof(u32)) +
+		       2 * nla_total_size(sizeof(u64));
+
+	/* We have to allocate using GFP_NOFS as we are called from a
+	 * filesystem performing write and thus further recursion into
+	 * the fs to free some data could cause deadlocks. */
+	skb = genlmsg_new(msg_size, GFP_NOFS);
+	if (!skb) {
+		printk(KERN_ERR
+		  "VFS: Not enough memory to send quota warning.\n");
+		return;
+	}
+	msg_head = genlmsg_put(skb, 0, atomic_add_return(1, &seq),
+			&quota_genl_family, 0, QUOTA_NL_C_WARNING);
+	if (!msg_head) {
+		printk(KERN_ERR
+		  "VFS: Cannot store netlink header in quota warning.\n");
+		goto err_out;
+	}
+	ret = nla_put_u32(skb, QUOTA_NL_A_QTYPE, type);
+	if (ret)
+		goto attr_err_out;
+	ret = nla_put_u64(skb, QUOTA_NL_A_EXCESS_ID, id);
+	if (ret)
+		goto attr_err_out;
+	ret = nla_put_u32(skb, QUOTA_NL_A_WARNING, warntype);
+	if (ret)
+		goto attr_err_out;
+	ret = nla_put_u32(skb, QUOTA_NL_A_DEV_MAJOR, MAJOR(dev));
+	if (ret)
+		goto attr_err_out;
+	ret = nla_put_u32(skb, QUOTA_NL_A_DEV_MINOR, MINOR(dev));
+	if (ret)
+		goto attr_err_out;
+	ret = nla_put_u64(skb, QUOTA_NL_A_CAUSED_ID, current_uid());
+	if (ret)
+		goto attr_err_out;
+	genlmsg_end(skb, msg_head);
+
+	genlmsg_multicast(skb, 0, quota_genl_family.id, GFP_NOFS);
+	return;
+attr_err_out:
+	printk(KERN_ERR "VFS: Not enough space to compose quota message!\n");
+err_out:
+	kfree_skb(skb);
+}
+EXPORT_SYMBOL(quota_send_warning);
+
+static int __init quota_init(void)
+{
+	if (genl_register_family(&quota_genl_family) != 0)
+		printk(KERN_ERR
+		       "VFS: Failed to create quota netlink interface.\n");
+	return 0;
+};
+
+module_init(quota_init);
+#endif
+

fs/xattr_acl.c

@@ -36,7 +36,7 @@ posix_acl_from_xattr(const void *value, size_t size)
 	if (count == 0)
 		return NULL;
 	
-	acl = posix_acl_alloc(count, GFP_KERNEL);
+	acl = posix_acl_alloc(count, GFP_NOFS);
 	if (!acl)
 		return ERR_PTR(-ENOMEM);
 	acl_e = acl->a_entries;

include/linux/gfs2_ondisk.h

@@ -81,7 +81,11 @@ struct gfs2_meta_header {
 	__be32 mh_type;
 	__be64 __pad0;		/* Was generation number in gfs1 */
 	__be32 mh_format;
-	__be32 __pad1;		/* Was incarnation number in gfs1 */
+	/* This union is to keep userspace happy */
+	union {
+		__be32 mh_jid;		/* Was incarnation number in gfs1 */
+		__be32 __pad1;
+	};
 };
 
 /*

include/linux/posix_acl.h

@@ -147,6 +147,20 @@ static inline void forget_cached_acl(struct inode *inode, int type)
 	if (old != ACL_NOT_CACHED)
 		posix_acl_release(old);
 }
+
+static inline void forget_all_cached_acls(struct inode *inode)
+{
+	struct posix_acl *old_access, *old_default;
+	spin_lock(&inode->i_lock);
+	old_access = inode->i_acl;
+	old_default = inode->i_default_acl;
+	inode->i_acl = inode->i_default_acl = ACL_NOT_CACHED;
+	spin_unlock(&inode->i_lock);
+	if (old_access != ACL_NOT_CACHED)
+		posix_acl_release(old_access);
+	if (old_default != ACL_NOT_CACHED)
+		posix_acl_release(old_default);
+}
 #endif
 
 static inline void cache_no_acl(struct inode *inode)

include/linux/quota.h

@@ -376,6 +376,17 @@ static inline unsigned int dquot_generic_flag(unsigned int flags, int type)
 	return flags >> _DQUOT_STATE_FLAGS;
 }
 
+#ifdef CONFIG_QUOTA_NETLINK_INTERFACE
+extern void quota_send_warning(short type, unsigned int id, dev_t dev,
+			       const char warntype);
+#else
+static inline void quota_send_warning(short type, unsigned int id, dev_t dev,
+				      const char warntype)
+{
+	return;
+}
+#endif /* CONFIG_QUOTA_NETLINK_INTERFACE */
+
 struct quota_info {
 	unsigned int flags;			/* Flags for diskquotas on this device */
 	struct mutex dqio_mutex;		/* lock device while I/O in progress */