Commit 115ff50b authored by Dave Kleikamp's avatar Dave Kleikamp
Browse files

JFS: Quota support broken, no quota_read and quota_write 



jfs_quota_read/write are very near duplicates of ext2_quota_read/write.

Cleaned up jfs_get_block as long as I had to change it to be non-static.

Signed-off-by: default avatarDave Kleikamp <shaggy@austin.ibm.com>
parent 64821324

fs/jfs/inode.c

+4 −12
Original line number Diff line number Diff line
@@ -168,8 +168,7 @@ void jfs_dirty_inode(struct inode *inode) 
	set_cflag(COMMIT_Dirty, inode);

}



static int

jfs_get_blocks(struct inode *ip, sector_t lblock, unsigned long max_blocks,

int jfs_get_block(struct inode *ip, sector_t lblock,

		  struct buffer_head *bh_result, int create)

{

	s64 lblock64 = lblock;
@@ -177,7 +176,7 @@ jfs_get_blocks(struct inode *ip, sector_t lblock, unsigned long max_blocks, 
	xad_t xad;

	s64 xaddr;

	int xflag;

	s32 xlen = max_blocks;

	s32 xlen = bh_result->b_size >> ip->i_blkbits;



	/*

	 * Take appropriate lock on inode
@@ -188,7 +187,7 @@ jfs_get_blocks(struct inode *ip, sector_t lblock, unsigned long max_blocks, 
		IREAD_LOCK(ip);



	if (((lblock64 << ip->i_sb->s_blocksize_bits) < ip->i_size) &&

	    (!xtLookup(ip, lblock64, max_blocks, &xflag, &xaddr, &xlen, 0)) &&

	    (!xtLookup(ip, lblock64, xlen, &xflag, &xaddr, &xlen, 0)) &&

	    xaddr) {

		if (xflag & XAD_NOTRECORDED) {

			if (!create)
@@ -255,13 +254,6 @@ jfs_get_blocks(struct inode *ip, sector_t lblock, unsigned long max_blocks, 
	return rc;

}



static int jfs_get_block(struct inode *ip, sector_t lblock,

			 struct buffer_head *bh_result, int create)

{

	return jfs_get_blocks(ip, lblock, bh_result->b_size >> ip->i_blkbits,

			bh_result, create);

}



static int jfs_writepage(struct page *page, struct writeback_control *wbc)

{

	return nobh_writepage(page, jfs_get_block, wbc);

fs/jfs/jfs_inode.h

+1 −0
Original line number Diff line number Diff line
@@ -32,6 +32,7 @@ extern void jfs_truncate_nolock(struct inode *, loff_t); 
extern void jfs_free_zero_link(struct inode *);

extern struct dentry *jfs_get_parent(struct dentry *dentry);

extern void jfs_set_inode_flags(struct inode *);

extern int jfs_get_block(struct inode *, sector_t, struct buffer_head *, int);



extern const struct address_space_operations jfs_aops;

extern struct inode_operations jfs_dir_inode_operations;

fs/jfs/super.c

+114 −3
Original line number Diff line number Diff line
@@ -26,6 +26,7 @@ 
#include <linux/moduleparam.h>

#include <linux/kthread.h>

#include <linux/posix_acl.h>

#include <linux/buffer_head.h>

#include <asm/uaccess.h>

#include <linux/seq_file.h>
@@ -298,7 +299,7 @@ static int parse_options(char *options, struct super_block *sb, s64 *newLVSize, 
			break;

		}



#if defined(CONFIG_QUOTA)

#ifdef CONFIG_QUOTA

		case Opt_quota:

		case Opt_usrquota:

			*flag |= JFS_USRQUOTA;
@@ -597,7 +598,7 @@ static int jfs_show_options(struct seq_file *seq, struct vfsmount *vfs) 
	if (sbi->flag & JFS_NOINTEGRITY)

		seq_puts(seq, ",nointegrity");



#if defined(CONFIG_QUOTA)

#ifdef CONFIG_QUOTA

	if (sbi->flag & JFS_USRQUOTA)

		seq_puts(seq, ",usrquota");
@@ -608,6 +609,112 @@ static int jfs_show_options(struct seq_file *seq, struct vfsmount *vfs) 
	return 0;

}



#ifdef CONFIG_QUOTA



/* Read data from quotafile - avoid pagecache and such because we cannot afford

 * acquiring the locks... As quota files are never truncated and quota code

 * itself serializes the operations (and noone else should touch the files)

 * we don't have to be afraid of races */

static ssize_t jfs_quota_read(struct super_block *sb, int type, char *data,

			      size_t len, loff_t off)

{

	struct inode *inode = sb_dqopt(sb)->files[type];

	sector_t blk = off >> sb->s_blocksize_bits;

	int err = 0;

	int offset = off & (sb->s_blocksize - 1);

	int tocopy;

	size_t toread;

	struct buffer_head tmp_bh;

	struct buffer_head *bh;

	loff_t i_size = i_size_read(inode);



	if (off > i_size)

		return 0;

	if (off+len > i_size)

		len = i_size-off;

	toread = len;

	while (toread > 0) {

		tocopy = sb->s_blocksize - offset < toread ?

				sb->s_blocksize - offset : toread;



		tmp_bh.b_state = 0;

		tmp_bh.b_size = 1 << inode->i_blkbits;

		err = jfs_get_block(inode, blk, &tmp_bh, 0);

		if (err)

			return err;

		if (!buffer_mapped(&tmp_bh))	/* A hole? */

			memset(data, 0, tocopy);

		else {

			bh = sb_bread(sb, tmp_bh.b_blocknr);

			if (!bh)

				return -EIO;

			memcpy(data, bh->b_data+offset, tocopy);

			brelse(bh);

		}

		offset = 0;

		toread -= tocopy;

		data += tocopy;

		blk++;

	}

	return len;

}



/* Write to quotafile */

static ssize_t jfs_quota_write(struct super_block *sb, int type,

			       const char *data, size_t len, loff_t off)

{

	struct inode *inode = sb_dqopt(sb)->files[type];

	sector_t blk = off >> sb->s_blocksize_bits;

	int err = 0;

	int offset = off & (sb->s_blocksize - 1);

	int tocopy;

	size_t towrite = len;

	struct buffer_head tmp_bh;

	struct buffer_head *bh;



	mutex_lock(&inode->i_mutex);

	while (towrite > 0) {

		tocopy = sb->s_blocksize - offset < towrite ?

				sb->s_blocksize - offset : towrite;



		tmp_bh.b_state = 0;

		err = jfs_get_block(inode, blk, &tmp_bh, 1);

		if (err)

			goto out;

		if (offset || tocopy != sb->s_blocksize)

			bh = sb_bread(sb, tmp_bh.b_blocknr);

		else

			bh = sb_getblk(sb, tmp_bh.b_blocknr);

		if (!bh) {

			err = -EIO;

			goto out;

		}

		lock_buffer(bh);

		memcpy(bh->b_data+offset, data, tocopy);

		flush_dcache_page(bh->b_page);

		set_buffer_uptodate(bh);

		mark_buffer_dirty(bh);

		unlock_buffer(bh);

		brelse(bh);

		offset = 0;

		towrite -= tocopy;

		data += tocopy;

		blk++;

	}

out:

	if (len == towrite)

		return err;

	if (inode->i_size < off+len-towrite)

		i_size_write(inode, off+len-towrite);

	inode->i_version++;

	inode->i_mtime = inode->i_ctime = CURRENT_TIME;

	mark_inode_dirty(inode);

	mutex_unlock(&inode->i_mutex);

	return len - towrite;

}



#endif



static struct super_operations jfs_super_operations = {

	.alloc_inode	= jfs_alloc_inode,

	.destroy_inode	= jfs_destroy_inode,
@@ -621,7 +728,11 @@ static struct super_operations jfs_super_operations = { 
	.unlockfs       = jfs_unlockfs,

	.statfs		= jfs_statfs,

	.remount_fs	= jfs_remount,

	.show_options	= jfs_show_options

	.show_options	= jfs_show_options,

#ifdef CONFIG_QUOTA

	.quota_read	= jfs_quota_read,

	.quota_write	= jfs_quota_write,

#endif

};



static struct export_operations jfs_export_operations = {

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