1 files changed, 0 insertions, 659 deletions

diff --git a/ANDROID_3.4.5/fs/quota/quota_tree.c b/ANDROID_3.4.5/fs/quota/quota_tree.c
deleted file mode 100644
index e41c1bec..00000000
--- a/ANDROID_3.4.5/fs/quota/quota_tree.c
+++ /dev/null
@@ -1,659 +0,0 @@
-/*
- *	vfsv0 quota IO operations on file
- */
-
-#include <linux/errno.h>
-#include <linux/fs.h>
-#include <linux/mount.h>
-#include <linux/dqblk_v2.h>
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/quotaops.h>
-
-#include <asm/byteorder.h>
-
-#include "quota_tree.h"
-
-MODULE_AUTHOR("Jan Kara");
-MODULE_DESCRIPTION("Quota trie support");
-MODULE_LICENSE("GPL");
-
-#define __QUOTA_QT_PARANOIA
-
-static int get_index(struct qtree_mem_dqinfo *info, qid_t id, int depth)
-{
-	unsigned int epb = info->dqi_usable_bs >> 2;
-
-	depth = info->dqi_qtree_depth - depth - 1;
-	while (depth--)
-		id /= epb;
-	return id % epb;
-}
-
-/* Number of entries in one blocks */
-static int qtree_dqstr_in_blk(struct qtree_mem_dqinfo *info)
-{
-	return (info->dqi_usable_bs - sizeof(struct qt_disk_dqdbheader))
-	       / info->dqi_entry_size;
-}
-
-static char *getdqbuf(size_t size)
-{
-	char *buf = kmalloc(size, GFP_NOFS);
-	if (!buf)
-		printk(KERN_WARNING
-		       "VFS: Not enough memory for quota buffers.\n");
-	return buf;
-}
-
-static ssize_t read_blk(struct qtree_mem_dqinfo *info, uint blk, char *buf)
-{
-	struct super_block *sb = info->dqi_sb;
-
-	memset(buf, 0, info->dqi_usable_bs);
-	return sb->s_op->quota_read(sb, info->dqi_type, buf,
-	       info->dqi_usable_bs, blk << info->dqi_blocksize_bits);
-}
-
-static ssize_t write_blk(struct qtree_mem_dqinfo *info, uint blk, char *buf)
-{
-	struct super_block *sb = info->dqi_sb;
-	ssize_t ret;
-
-	ret = sb->s_op->quota_write(sb, info->dqi_type, buf,
-	       info->dqi_usable_bs, blk << info->dqi_blocksize_bits);
-	if (ret != info->dqi_usable_bs) {
-		quota_error(sb, "dquota write failed");
-		if (ret >= 0)
-			ret = -EIO;
-	}
-	return ret;
-}
-
-/* Remove empty block from list and return it */
-static int get_free_dqblk(struct qtree_mem_dqinfo *info)
-{
-	char *buf = getdqbuf(info->dqi_usable_bs);
-	struct qt_disk_dqdbheader *dh = (struct qt_disk_dqdbheader *)buf;
-	int ret, blk;
-
-	if (!buf)
-		return -ENOMEM;
-	if (info->dqi_free_blk) {
-		blk = info->dqi_free_blk;
-		ret = read_blk(info, blk, buf);
-		if (ret < 0)
-			goto out_buf;
-		info->dqi_free_blk = le32_to_cpu(dh->dqdh_next_free);
-	}
-	else {
-		memset(buf, 0, info->dqi_usable_bs);
-		/* Assure block allocation... */
-		ret = write_blk(info, info->dqi_blocks, buf);
-		if (ret < 0)
-			goto out_buf;
-		blk = info->dqi_blocks++;
-	}
-	mark_info_dirty(info->dqi_sb, info->dqi_type);
-	ret = blk;
-out_buf:
-	kfree(buf);
-	return ret;
-}
-
-/* Insert empty block to the list */
-static int put_free_dqblk(struct qtree_mem_dqinfo *info, char *buf, uint blk)
-{
-	struct qt_disk_dqdbheader *dh = (struct qt_disk_dqdbheader *)buf;
-	int err;
-
-	dh->dqdh_next_free = cpu_to_le32(info->dqi_free_blk);
-	dh->dqdh_prev_free = cpu_to_le32(0);
-	dh->dqdh_entries = cpu_to_le16(0);
-	err = write_blk(info, blk, buf);
-	if (err < 0)
-		return err;
-	info->dqi_free_blk = blk;
-	mark_info_dirty(info->dqi_sb, info->dqi_type);
-	return 0;
-}
-
-/* Remove given block from the list of blocks with free entries */
-static int remove_free_dqentry(struct qtree_mem_dqinfo *info, char *buf,
-			       uint blk)
-{
-	char *tmpbuf = getdqbuf(info->dqi_usable_bs);
-	struct qt_disk_dqdbheader *dh = (struct qt_disk_dqdbheader *)buf;
-	uint nextblk = le32_to_cpu(dh->dqdh_next_free);
-	uint prevblk = le32_to_cpu(dh->dqdh_prev_free);
-	int err;
-
-	if (!tmpbuf)
-		return -ENOMEM;
-	if (nextblk) {
-		err = read_blk(info, nextblk, tmpbuf);
-		if (err < 0)
-			goto out_buf;
-		((struct qt_disk_dqdbheader *)tmpbuf)->dqdh_prev_free =
-							dh->dqdh_prev_free;
-		err = write_blk(info, nextblk, tmpbuf);
-		if (err < 0)
-			goto out_buf;
-	}
-	if (prevblk) {
-		err = read_blk(info, prevblk, tmpbuf);
-		if (err < 0)
-			goto out_buf;
-		((struct qt_disk_dqdbheader *)tmpbuf)->dqdh_next_free =
-							dh->dqdh_next_free;
-		err = write_blk(info, prevblk, tmpbuf);
-		if (err < 0)
-			goto out_buf;
-	} else {
-		info->dqi_free_entry = nextblk;
-		mark_info_dirty(info->dqi_sb, info->dqi_type);
-	}
-	kfree(tmpbuf);
-	dh->dqdh_next_free = dh->dqdh_prev_free = cpu_to_le32(0);
-	/* No matter whether write succeeds block is out of list */
-	if (write_blk(info, blk, buf) < 0)
-		quota_error(info->dqi_sb, "Can't write block (%u) "
-			    "with free entries", blk);
-	return 0;
-out_buf:
-	kfree(tmpbuf);
-	return err;
-}
-
-/* Insert given block to the beginning of list with free entries */
-static int insert_free_dqentry(struct qtree_mem_dqinfo *info, char *buf,
-			       uint blk)
-{
-	char *tmpbuf = getdqbuf(info->dqi_usable_bs);
-	struct qt_disk_dqdbheader *dh = (struct qt_disk_dqdbheader *)buf;
-	int err;
-
-	if (!tmpbuf)
-		return -ENOMEM;
-	dh->dqdh_next_free = cpu_to_le32(info->dqi_free_entry);
-	dh->dqdh_prev_free = cpu_to_le32(0);
-	err = write_blk(info, blk, buf);
-	if (err < 0)
-		goto out_buf;
-	if (info->dqi_free_entry) {
-		err = read_blk(info, info->dqi_free_entry, tmpbuf);
-		if (err < 0)
-			goto out_buf;
-		((struct qt_disk_dqdbheader *)tmpbuf)->dqdh_prev_free =
-							cpu_to_le32(blk);
-		err = write_blk(info, info->dqi_free_entry, tmpbuf);
-		if (err < 0)
-			goto out_buf;
-	}
-	kfree(tmpbuf);
-	info->dqi_free_entry = blk;
-	mark_info_dirty(info->dqi_sb, info->dqi_type);
-	return 0;
-out_buf:
-	kfree(tmpbuf);
-	return err;
-}
-
-/* Is the entry in the block free? */
-int qtree_entry_unused(struct qtree_mem_dqinfo *info, char *disk)
-{
-	int i;
-
-	for (i = 0; i < info->dqi_entry_size; i++)
-		if (disk[i])
-			return 0;
-	return 1;
-}
-EXPORT_SYMBOL(qtree_entry_unused);
-
-/* Find space for dquot */
-static uint find_free_dqentry(struct qtree_mem_dqinfo *info,
-			      struct dquot *dquot, int *err)
-{
-	uint blk, i;
-	struct qt_disk_dqdbheader *dh;
-	char *buf = getdqbuf(info->dqi_usable_bs);
-	char *ddquot;
-
-	*err = 0;
-	if (!buf) {
-		*err = -ENOMEM;
-		return 0;
-	}
-	dh = (struct qt_disk_dqdbheader *)buf;
-	if (info->dqi_free_entry) {
-		blk = info->dqi_free_entry;
-		*err = read_blk(info, blk, buf);
-		if (*err < 0)
-			goto out_buf;
-	} else {
-		blk = get_free_dqblk(info);
-		if ((int)blk < 0) {
-			*err = blk;
-			kfree(buf);
-			return 0;
-		}
-		memset(buf, 0, info->dqi_usable_bs);
-		/* This is enough as the block is already zeroed and the entry
-		 * list is empty... */
-		info->dqi_free_entry = blk;
-		mark_info_dirty(dquot->dq_sb, dquot->dq_type);
-	}
-	/* Block will be full? */
-	if (le16_to_cpu(dh->dqdh_entries) + 1 >= qtree_dqstr_in_blk(info)) {
-		*err = remove_free_dqentry(info, buf, blk);
-		if (*err < 0) {
-			quota_error(dquot->dq_sb, "Can't remove block (%u) "
-				    "from entry free list", blk);
-			goto out_buf;
-		}
-	}
-	le16_add_cpu(&dh->dqdh_entries, 1);
-	/* Find free structure in block */
-	ddquot = buf + sizeof(struct qt_disk_dqdbheader);
-	for (i = 0; i < qtree_dqstr_in_blk(info); i++) {
-		if (qtree_entry_unused(info, ddquot))
-			break;
-		ddquot += info->dqi_entry_size;
-	}
-#ifdef __QUOTA_QT_PARANOIA
-	if (i == qtree_dqstr_in_blk(info)) {
-		quota_error(dquot->dq_sb, "Data block full but it shouldn't");
-		*err = -EIO;
-		goto out_buf;
-	}
-#endif
-	*err = write_blk(info, blk, buf);
-	if (*err < 0) {
-		quota_error(dquot->dq_sb, "Can't write quota data block %u",
-			    blk);
-		goto out_buf;
-	}
-	dquot->dq_off = (blk << info->dqi_blocksize_bits) +
-			sizeof(struct qt_disk_dqdbheader) +
-			i * info->dqi_entry_size;
-	kfree(buf);
-	return blk;
-out_buf:
-	kfree(buf);
-	return 0;
-}
-
-/* Insert reference to structure into the trie */
-static int do_insert_tree(struct qtree_mem_dqinfo *info, struct dquot *dquot,
-			  uint *treeblk, int depth)
-{
-	char *buf = getdqbuf(info->dqi_usable_bs);
-	int ret = 0, newson = 0, newact = 0;
-	__le32 *ref;
-	uint newblk;
-
-	if (!buf)
-		return -ENOMEM;
-	if (!*treeblk) {
-		ret = get_free_dqblk(info);
-		if (ret < 0)
-			goto out_buf;
-		*treeblk = ret;
-		memset(buf, 0, info->dqi_usable_bs);
-		newact = 1;
-	} else {
-		ret = read_blk(info, *treeblk, buf);
-		if (ret < 0) {
-			quota_error(dquot->dq_sb, "Can't read tree quota "
-				    "block %u", *treeblk);
-			goto out_buf;
-		}
-	}
-	ref = (__le32 *)buf;
-	newblk = le32_to_cpu(ref[get_index(info, dquot->dq_id, depth)]);
-	if (!newblk)
-		newson = 1;
-	if (depth == info->dqi_qtree_depth - 1) {
-#ifdef __QUOTA_QT_PARANOIA
-		if (newblk) {
-			quota_error(dquot->dq_sb, "Inserting already present "
-				    "quota entry (block %u)",
-				    le32_to_cpu(ref[get_index(info,
-						dquot->dq_id, depth)]));
-			ret = -EIO;
-			goto out_buf;
-		}
-#endif
-		newblk = find_free_dqentry(info, dquot, &ret);
-	} else {
-		ret = do_insert_tree(info, dquot, &newblk, depth+1);
-	}
-	if (newson && ret >= 0) {
-		ref[get_index(info, dquot->dq_id, depth)] =
-							cpu_to_le32(newblk);
-		ret = write_blk(info, *treeblk, buf);
-	} else if (newact && ret < 0) {
-		put_free_dqblk(info, buf, *treeblk);
-	}
-out_buf:
-	kfree(buf);
-	return ret;
-}
-
-/* Wrapper for inserting quota structure into tree */
-static inline int dq_insert_tree(struct qtree_mem_dqinfo *info,
-				 struct dquot *dquot)
-{
-	int tmp = QT_TREEOFF;
-	return do_insert_tree(info, dquot, &tmp, 0);
-}
-
-/*
- * We don't have to be afraid of deadlocks as we never have quotas on quota
- * files...
- */
-int qtree_write_dquot(struct qtree_mem_dqinfo *info, struct dquot *dquot)
-{
-	int type = dquot->dq_type;
-	struct super_block *sb = dquot->dq_sb;
-	ssize_t ret;
-	char *ddquot = getdqbuf(info->dqi_entry_size);
-
-	if (!ddquot)
-		return -ENOMEM;
-
-	/* dq_off is guarded by dqio_mutex */
-	if (!dquot->dq_off) {
-		ret = dq_insert_tree(info, dquot);
-		if (ret < 0) {
-			quota_error(sb, "Error %zd occurred while creating "
-				    "quota", ret);
-			kfree(ddquot);
-			return ret;
-		}
-	}
-	spin_lock(&dq_data_lock);
-	info->dqi_ops->mem2disk_dqblk(ddquot, dquot);
-	spin_unlock(&dq_data_lock);
-	ret = sb->s_op->quota_write(sb, type, ddquot, info->dqi_entry_size,
-				    dquot->dq_off);
-	if (ret != info->dqi_entry_size) {
-		quota_error(sb, "dquota write failed");
-		if (ret >= 0)
-			ret = -ENOSPC;
-	} else {
-		ret = 0;
-	}
-	dqstats_inc(DQST_WRITES);
-	kfree(ddquot);
-
-	return ret;
-}
-EXPORT_SYMBOL(qtree_write_dquot);
-
-/* Free dquot entry in data block */
-static int free_dqentry(struct qtree_mem_dqinfo *info, struct dquot *dquot,
-			uint blk)
-{
-	struct qt_disk_dqdbheader *dh;
-	char *buf = getdqbuf(info->dqi_usable_bs);
-	int ret = 0;
-
-	if (!buf)
-		return -ENOMEM;
-	if (dquot->dq_off >> info->dqi_blocksize_bits != blk) {
-		quota_error(dquot->dq_sb, "Quota structure has offset to "
-			"other block (%u) than it should (%u)", blk,
-			(uint)(dquot->dq_off >> info->dqi_blocksize_bits));
-		goto out_buf;
-	}
-	ret = read_blk(info, blk, buf);
-	if (ret < 0) {
-		quota_error(dquot->dq_sb, "Can't read quota data block %u",
-			    blk);
-		goto out_buf;
-	}
-	dh = (struct qt_disk_dqdbheader *)buf;
-	le16_add_cpu(&dh->dqdh_entries, -1);
-	if (!le16_to_cpu(dh->dqdh_entries)) {	/* Block got free? */
-		ret = remove_free_dqentry(info, buf, blk);
-		if (ret >= 0)
-			ret = put_free_dqblk(info, buf, blk);
-		if (ret < 0) {
-			quota_error(dquot->dq_sb, "Can't move quota data block "
-				    "(%u) to free list", blk);
-			goto out_buf;
-		}
-	} else {
-		memset(buf +
-		       (dquot->dq_off & ((1 << info->dqi_blocksize_bits) - 1)),
-		       0, info->dqi_entry_size);
-		if (le16_to_cpu(dh->dqdh_entries) ==
-		    qtree_dqstr_in_blk(info) - 1) {
-			/* Insert will write block itself */
-			ret = insert_free_dqentry(info, buf, blk);
-			if (ret < 0) {
-				quota_error(dquot->dq_sb, "Can't insert quota "
-				    "data block (%u) to free entry list", blk);
-				goto out_buf;
-			}
-		} else {
-			ret = write_blk(info, blk, buf);
-			if (ret < 0) {
-				quota_error(dquot->dq_sb, "Can't write quota "
-					    "data block %u", blk);
-				goto out_buf;
-			}
-		}
-	}
-	dquot->dq_off = 0;	/* Quota is now unattached */
-out_buf:
-	kfree(buf);
-	return ret;
-}
-
-/* Remove reference to dquot from tree */
-static int remove_tree(struct qtree_mem_dqinfo *info, struct dquot *dquot,
-		       uint *blk, int depth)
-{
-	char *buf = getdqbuf(info->dqi_usable_bs);
-	int ret = 0;
-	uint newblk;
-	__le32 *ref = (__le32 *)buf;
-
-	if (!buf)
-		return -ENOMEM;
-	ret = read_blk(info, *blk, buf);
-	if (ret < 0) {
-		quota_error(dquot->dq_sb, "Can't read quota data block %u",
-			    *blk);
-		goto out_buf;
-	}
-	newblk = le32_to_cpu(ref[get_index(info, dquot->dq_id, depth)]);
-	if (depth == info->dqi_qtree_depth - 1) {
-		ret = free_dqentry(info, dquot, newblk);
-		newblk = 0;
-	} else {
-		ret = remove_tree(info, dquot, &newblk, depth+1);
-	}
-	if (ret >= 0 && !newblk) {
-		int i;
-		ref[get_index(info, dquot->dq_id, depth)] = cpu_to_le32(0);
-		/* Block got empty? */
-		for (i = 0; i < (info->dqi_usable_bs >> 2) && !ref[i]; i++)
-			;
-		/* Don't put the root block into the free block list */
-		if (i == (info->dqi_usable_bs >> 2)
-		    && *blk != QT_TREEOFF) {
-			put_free_dqblk(info, buf, *blk);
-			*blk = 0;
-		} else {
-			ret = write_blk(info, *blk, buf);
-			if (ret < 0)
-				quota_error(dquot->dq_sb,
-					    "Can't write quota tree block %u",
-					    *blk);
-		}
-	}
-out_buf:
-	kfree(buf);
-	return ret;
-}
-
-/* Delete dquot from tree */
-int qtree_delete_dquot(struct qtree_mem_dqinfo *info, struct dquot *dquot)
-{
-	uint tmp = QT_TREEOFF;
-
-	if (!dquot->dq_off)	/* Even not allocated? */
-		return 0;
-	return remove_tree(info, dquot, &tmp, 0);
-}
-EXPORT_SYMBOL(qtree_delete_dquot);
-
-/* Find entry in block */
-static loff_t find_block_dqentry(struct qtree_mem_dqinfo *info,
-				 struct dquot *dquot, uint blk)
-{
-	char *buf = getdqbuf(info->dqi_usable_bs);
-	loff_t ret = 0;
-	int i;
-	char *ddquot;
-
-	if (!buf)
-		return -ENOMEM;
-	ret = read_blk(info, blk, buf);
-	if (ret < 0) {
-		quota_error(dquot->dq_sb, "Can't read quota tree "
-			    "block %u", blk);
-		goto out_buf;
-	}
-	ddquot = buf + sizeof(struct qt_disk_dqdbheader);
-	for (i = 0; i < qtree_dqstr_in_blk(info); i++) {
-		if (info->dqi_ops->is_id(ddquot, dquot))
-			break;
-		ddquot += info->dqi_entry_size;
-	}
-	if (i == qtree_dqstr_in_blk(info)) {
-		quota_error(dquot->dq_sb, "Quota for id %u referenced "
-			    "but not present", dquot->dq_id);
-		ret = -EIO;
-		goto out_buf;
-	} else {
-		ret = (blk << info->dqi_blocksize_bits) + sizeof(struct
-		  qt_disk_dqdbheader) + i * info->dqi_entry_size;
-	}
-out_buf:
-	kfree(buf);
-	return ret;
-}
-
-/* Find entry for given id in the tree */
-static loff_t find_tree_dqentry(struct qtree_mem_dqinfo *info,
-				struct dquot *dquot, uint blk, int depth)
-{
-	char *buf = getdqbuf(info->dqi_usable_bs);
-	loff_t ret = 0;
-	__le32 *ref = (__le32 *)buf;
-
-	if (!buf)
-		return -ENOMEM;
-	ret = read_blk(info, blk, buf);
-	if (ret < 0) {
-		quota_error(dquot->dq_sb, "Can't read quota tree block %u",
-			    blk);
-		goto out_buf;
-	}
-	ret = 0;
-	blk = le32_to_cpu(ref[get_index(info, dquot->dq_id, depth)]);
-	if (!blk)	/* No reference? */
-		goto out_buf;
-	if (depth < info->dqi_qtree_depth - 1)
-		ret = find_tree_dqentry(info, dquot, blk, depth+1);
-	else
-		ret = find_block_dqentry(info, dquot, blk);
-out_buf:
-	kfree(buf);
-	return ret;
-}
-
-/* Find entry for given id in the tree - wrapper function */
-static inline loff_t find_dqentry(struct qtree_mem_dqinfo *info,
-				  struct dquot *dquot)
-{
-	return find_tree_dqentry(info, dquot, QT_TREEOFF, 0);
-}
-
-int qtree_read_dquot(struct qtree_mem_dqinfo *info, struct dquot *dquot)
-{
-	int type = dquot->dq_type;
-	struct super_block *sb = dquot->dq_sb;
-	loff_t offset;
-	char *ddquot;
-	int ret = 0;
-
-#ifdef __QUOTA_QT_PARANOIA
-	/* Invalidated quota? */
-	if (!sb_dqopt(dquot->dq_sb)->files[type]) {
-		quota_error(sb, "Quota invalidated while reading!");
-		return -EIO;
-	}
-#endif
-	/* Do we know offset of the dquot entry in the quota file? */
-	if (!dquot->dq_off) {
-		offset = find_dqentry(info, dquot);
-		if (offset <= 0) {	/* Entry not present? */
-			if (offset < 0)
-				quota_error(sb, "Can't read quota structure "
-					    "for id %u", dquot->dq_id);
-			dquot->dq_off = 0;
-			set_bit(DQ_FAKE_B, &dquot->dq_flags);
-			memset(&dquot->dq_dqb, 0, sizeof(struct mem_dqblk));
-			ret = offset;
-			goto out;
-		}
-		dquot->dq_off = offset;
-	}
-	ddquot = getdqbuf(info->dqi_entry_size);
-	if (!ddquot)
-		return -ENOMEM;
-	ret = sb->s_op->quota_read(sb, type, ddquot, info->dqi_entry_size,
-				   dquot->dq_off);
-	if (ret != info->dqi_entry_size) {
-		if (ret >= 0)
-			ret = -EIO;
-		quota_error(sb, "Error while reading quota structure for id %u",
-			    dquot->dq_id);
-		set_bit(DQ_FAKE_B, &dquot->dq_flags);
-		memset(&dquot->dq_dqb, 0, sizeof(struct mem_dqblk));
-		kfree(ddquot);
-		goto out;
-	}
-	spin_lock(&dq_data_lock);
-	info->dqi_ops->disk2mem_dqblk(dquot, ddquot);
-	if (!dquot->dq_dqb.dqb_bhardlimit &&
-	    !dquot->dq_dqb.dqb_bsoftlimit &&
-	    !dquot->dq_dqb.dqb_ihardlimit &&
-	    !dquot->dq_dqb.dqb_isoftlimit)
-		set_bit(DQ_FAKE_B, &dquot->dq_flags);
-	spin_unlock(&dq_data_lock);
-	kfree(ddquot);
-out:
-	dqstats_inc(DQST_READS);
-	return ret;
-}
-EXPORT_SYMBOL(qtree_read_dquot);
-
-/* Check whether dquot should not be deleted. We know we are
- * the only one operating on dquot (thanks to dq_lock) */
-int qtree_release_dquot(struct qtree_mem_dqinfo *info, struct dquot *dquot)
-{
-	if (test_bit(DQ_FAKE_B, &dquot->dq_flags) &&
-	    !(dquot->dq_dqb.dqb_curinodes | dquot->dq_dqb.dqb_curspace))
-		return qtree_delete_dquot(info, dquot);
-	return 0;
-}
-EXPORT_SYMBOL(qtree_release_dquot);