forked from luck/tmp_suning_uos_patched
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: Dave Kleikamp <shaggy@austin.ibm.com>
This commit is contained in:
Dave Kleikamp
parent
64821324ca
commit
115ff50bad
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@ -168,16 +168,15 @@ void jfs_dirty_inode(struct inode *inode)
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set_cflag(COMMIT_Dirty, inode);
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}
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static int
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jfs_get_blocks(struct inode *ip, sector_t lblock, unsigned long max_blocks,
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struct buffer_head *bh_result, int create)
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int jfs_get_block(struct inode *ip, sector_t lblock,
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struct buffer_head *bh_result, int create)
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{
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s64 lblock64 = lblock;
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int rc = 0;
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xad_t xad;
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s64 xaddr;
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int xflag;
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s32 xlen = max_blocks;
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s32 xlen = bh_result->b_size >> ip->i_blkbits;
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/*
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* Take appropriate lock on inode
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@ -188,7 +187,7 @@ jfs_get_blocks(struct inode *ip, sector_t lblock, unsigned long max_blocks,
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IREAD_LOCK(ip);
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if (((lblock64 << ip->i_sb->s_blocksize_bits) < ip->i_size) &&
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(!xtLookup(ip, lblock64, max_blocks, &xflag, &xaddr, &xlen, 0)) &&
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(!xtLookup(ip, lblock64, xlen, &xflag, &xaddr, &xlen, 0)) &&
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xaddr) {
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if (xflag & XAD_NOTRECORDED) {
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if (!create)
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@ -255,13 +254,6 @@ jfs_get_blocks(struct inode *ip, sector_t lblock, unsigned long max_blocks,
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return rc;
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}
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static int jfs_get_block(struct inode *ip, sector_t lblock,
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struct buffer_head *bh_result, int create)
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{
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return jfs_get_blocks(ip, lblock, bh_result->b_size >> ip->i_blkbits,
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bh_result, create);
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}
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static int jfs_writepage(struct page *page, struct writeback_control *wbc)
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{
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return nobh_writepage(page, jfs_get_block, wbc);
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@ -32,6 +32,7 @@ extern void jfs_truncate_nolock(struct inode *, loff_t);
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extern void jfs_free_zero_link(struct inode *);
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extern struct dentry *jfs_get_parent(struct dentry *dentry);
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extern void jfs_set_inode_flags(struct inode *);
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extern int jfs_get_block(struct inode *, sector_t, struct buffer_head *, int);
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extern const struct address_space_operations jfs_aops;
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extern struct inode_operations jfs_dir_inode_operations;
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117
fs/jfs/super.c
117
fs/jfs/super.c
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@ -26,6 +26,7 @@
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#include <linux/moduleparam.h>
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#include <linux/kthread.h>
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#include <linux/posix_acl.h>
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#include <linux/buffer_head.h>
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#include <asm/uaccess.h>
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#include <linux/seq_file.h>
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@ -298,7 +299,7 @@ static int parse_options(char *options, struct super_block *sb, s64 *newLVSize,
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break;
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}
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#if defined(CONFIG_QUOTA)
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#ifdef CONFIG_QUOTA
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case Opt_quota:
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case Opt_usrquota:
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*flag |= JFS_USRQUOTA;
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@ -597,7 +598,7 @@ static int jfs_show_options(struct seq_file *seq, struct vfsmount *vfs)
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if (sbi->flag & JFS_NOINTEGRITY)
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seq_puts(seq, ",nointegrity");
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#if defined(CONFIG_QUOTA)
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#ifdef CONFIG_QUOTA
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if (sbi->flag & JFS_USRQUOTA)
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seq_puts(seq, ",usrquota");
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@ -608,6 +609,112 @@ static int jfs_show_options(struct seq_file *seq, struct vfsmount *vfs)
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return 0;
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}
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#ifdef CONFIG_QUOTA
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/* Read data from quotafile - avoid pagecache and such because we cannot afford
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* acquiring the locks... As quota files are never truncated and quota code
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* itself serializes the operations (and noone else should touch the files)
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* we don't have to be afraid of races */
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static ssize_t jfs_quota_read(struct super_block *sb, int type, char *data,
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size_t len, loff_t off)
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{
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struct inode *inode = sb_dqopt(sb)->files[type];
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sector_t blk = off >> sb->s_blocksize_bits;
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int err = 0;
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int offset = off & (sb->s_blocksize - 1);
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int tocopy;
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size_t toread;
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struct buffer_head tmp_bh;
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struct buffer_head *bh;
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loff_t i_size = i_size_read(inode);
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if (off > i_size)
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return 0;
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if (off+len > i_size)
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len = i_size-off;
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toread = len;
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while (toread > 0) {
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tocopy = sb->s_blocksize - offset < toread ?
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sb->s_blocksize - offset : toread;
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tmp_bh.b_state = 0;
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tmp_bh.b_size = 1 << inode->i_blkbits;
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err = jfs_get_block(inode, blk, &tmp_bh, 0);
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if (err)
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return err;
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if (!buffer_mapped(&tmp_bh)) /* A hole? */
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memset(data, 0, tocopy);
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else {
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bh = sb_bread(sb, tmp_bh.b_blocknr);
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if (!bh)
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return -EIO;
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memcpy(data, bh->b_data+offset, tocopy);
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brelse(bh);
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}
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offset = 0;
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toread -= tocopy;
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data += tocopy;
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blk++;
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}
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return len;
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}
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/* Write to quotafile */
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static ssize_t jfs_quota_write(struct super_block *sb, int type,
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const char *data, size_t len, loff_t off)
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{
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struct inode *inode = sb_dqopt(sb)->files[type];
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sector_t blk = off >> sb->s_blocksize_bits;
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int err = 0;
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int offset = off & (sb->s_blocksize - 1);
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int tocopy;
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size_t towrite = len;
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struct buffer_head tmp_bh;
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struct buffer_head *bh;
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mutex_lock(&inode->i_mutex);
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while (towrite > 0) {
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tocopy = sb->s_blocksize - offset < towrite ?
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sb->s_blocksize - offset : towrite;
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tmp_bh.b_state = 0;
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err = jfs_get_block(inode, blk, &tmp_bh, 1);
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if (err)
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goto out;
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if (offset || tocopy != sb->s_blocksize)
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bh = sb_bread(sb, tmp_bh.b_blocknr);
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else
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bh = sb_getblk(sb, tmp_bh.b_blocknr);
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if (!bh) {
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err = -EIO;
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goto out;
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}
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lock_buffer(bh);
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memcpy(bh->b_data+offset, data, tocopy);
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flush_dcache_page(bh->b_page);
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set_buffer_uptodate(bh);
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mark_buffer_dirty(bh);
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unlock_buffer(bh);
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brelse(bh);
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offset = 0;
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towrite -= tocopy;
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data += tocopy;
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blk++;
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}
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out:
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if (len == towrite)
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return err;
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if (inode->i_size < off+len-towrite)
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i_size_write(inode, off+len-towrite);
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inode->i_version++;
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inode->i_mtime = inode->i_ctime = CURRENT_TIME;
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mark_inode_dirty(inode);
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mutex_unlock(&inode->i_mutex);
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return len - towrite;
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}
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#endif
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static struct super_operations jfs_super_operations = {
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.alloc_inode = jfs_alloc_inode,
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.destroy_inode = jfs_destroy_inode,
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@ -621,7 +728,11 @@ static struct super_operations jfs_super_operations = {
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.unlockfs = jfs_unlockfs,
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.statfs = jfs_statfs,
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.remount_fs = jfs_remount,
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.show_options = jfs_show_options
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.show_options = jfs_show_options,
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#ifdef CONFIG_QUOTA
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.quota_read = jfs_quota_read,
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.quota_write = jfs_quota_write,
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#endif
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};
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static struct export_operations jfs_export_operations = {
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