#include <linux/fs.h>
#include <linux/mount.h>
#include <linux/dqblk_v2.h>
-#include <linux/quotaio_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"
+#include "quotaio_v2.h"
+
MODULE_AUTHOR("Jan Kara");
MODULE_DESCRIPTION("Quota format v2 support");
MODULE_LICENSE("GPL");
#define __QUOTA_V2_PARANOIA
-typedef char *dqbuf_t;
+static void v2_mem2diskdqb(void *dp, struct dquot *dquot);
+static void v2_disk2memdqb(struct dquot *dquot, void *dp);
+static int v2_is_id(void *dp, struct dquot *dquot);
+
+static struct qtree_fmt_operations v2_qtree_ops = {
+ .mem2disk_dqblk = v2_mem2diskdqb,
+ .disk2mem_dqblk = v2_disk2memdqb,
+ .is_id = v2_is_id,
+};
+
+#define QUOTABLOCK_BITS 10
+#define QUOTABLOCK_SIZE (1 << QUOTABLOCK_BITS)
-#define GETIDINDEX(id, depth) (((id) >> ((V2_DQTREEDEPTH-(depth)-1)*8)) & 0xff)
-#define GETENTRIES(buf) ((struct v2_disk_dqblk *)(((char *)buf)+sizeof(struct v2_disk_dqdbheader)))
+static inline qsize_t v2_stoqb(qsize_t space)
+{
+ return (space + QUOTABLOCK_SIZE - 1) >> QUOTABLOCK_BITS;
+}
+
+static inline qsize_t v2_qbtos(qsize_t blocks)
+{
+ return blocks << QUOTABLOCK_BITS;
+}
/* Check whether given file is really vfsv0 quotafile */
static int v2_check_quota_file(struct super_block *sb, int type)
size = sb->s_op->quota_read(sb, type, (char *)&dqhead, sizeof(struct v2_disk_dqheader), 0);
if (size != sizeof(struct v2_disk_dqheader)) {
- printk("quota_v2: failed read expected=%d got=%d\n",
+ printk("quota_v2: failed read expected=%zd got=%zd\n",
sizeof(struct v2_disk_dqheader), size);
return 0;
}
static int v2_read_file_info(struct super_block *sb, int type)
{
struct v2_disk_dqinfo dinfo;
- struct mem_dqinfo *info = sb_dqopt(sb)->info+type;
+ struct mem_dqinfo *info = sb_dqinfo(sb, type);
+ struct qtree_mem_dqinfo *qinfo;
ssize_t size;
size = sb->s_op->quota_read(sb, type, (char *)&dinfo,
sb->s_id);
return -1;
}
+ info->dqi_priv = kmalloc(sizeof(struct qtree_mem_dqinfo), GFP_NOFS);
+ if (!info->dqi_priv) {
+ printk(KERN_WARNING
+ "Not enough memory for quota information structure.\n");
+ return -1;
+ }
+ qinfo = info->dqi_priv;
+ /* limits are stored as unsigned 32-bit data */
+ info->dqi_maxblimit = 0xffffffff;
+ info->dqi_maxilimit = 0xffffffff;
info->dqi_bgrace = le32_to_cpu(dinfo.dqi_bgrace);
info->dqi_igrace = le32_to_cpu(dinfo.dqi_igrace);
info->dqi_flags = le32_to_cpu(dinfo.dqi_flags);
- info->u.v2_i.dqi_blocks = le32_to_cpu(dinfo.dqi_blocks);
- info->u.v2_i.dqi_free_blk = le32_to_cpu(dinfo.dqi_free_blk);
- info->u.v2_i.dqi_free_entry = le32_to_cpu(dinfo.dqi_free_entry);
+ qinfo->dqi_sb = sb;
+ qinfo->dqi_type = type;
+ qinfo->dqi_blocks = le32_to_cpu(dinfo.dqi_blocks);
+ qinfo->dqi_free_blk = le32_to_cpu(dinfo.dqi_free_blk);
+ qinfo->dqi_free_entry = le32_to_cpu(dinfo.dqi_free_entry);
+ qinfo->dqi_blocksize_bits = V2_DQBLKSIZE_BITS;
+ qinfo->dqi_usable_bs = 1 << V2_DQBLKSIZE_BITS;
+ qinfo->dqi_qtree_depth = qtree_depth(qinfo);
+ qinfo->dqi_entry_size = sizeof(struct v2_disk_dqblk);
+ qinfo->dqi_ops = &v2_qtree_ops;
return 0;
}
static int v2_write_file_info(struct super_block *sb, int type)
{
struct v2_disk_dqinfo dinfo;
- struct mem_dqinfo *info = sb_dqopt(sb)->info+type;
+ struct mem_dqinfo *info = sb_dqinfo(sb, type);
+ struct qtree_mem_dqinfo *qinfo = info->dqi_priv;
ssize_t size;
spin_lock(&dq_data_lock);
dinfo.dqi_igrace = cpu_to_le32(info->dqi_igrace);
dinfo.dqi_flags = cpu_to_le32(info->dqi_flags & DQF_MASK);
spin_unlock(&dq_data_lock);
- dinfo.dqi_blocks = cpu_to_le32(info->u.v2_i.dqi_blocks);
- dinfo.dqi_free_blk = cpu_to_le32(info->u.v2_i.dqi_free_blk);
- dinfo.dqi_free_entry = cpu_to_le32(info->u.v2_i.dqi_free_entry);
+ dinfo.dqi_blocks = cpu_to_le32(qinfo->dqi_blocks);
+ dinfo.dqi_free_blk = cpu_to_le32(qinfo->dqi_free_blk);
+ dinfo.dqi_free_entry = cpu_to_le32(qinfo->dqi_free_entry);
size = sb->s_op->quota_write(sb, type, (char *)&dinfo,
sizeof(struct v2_disk_dqinfo), V2_DQINFOOFF);
if (size != sizeof(struct v2_disk_dqinfo)) {
return 0;
}
-static void disk2memdqb(struct mem_dqblk *m, struct v2_disk_dqblk *d)
+static void v2_disk2memdqb(struct dquot *dquot, void *dp)
{
+ struct v2_disk_dqblk *d = dp, empty;
+ struct mem_dqblk *m = &dquot->dq_dqb;
+
m->dqb_ihardlimit = le32_to_cpu(d->dqb_ihardlimit);
m->dqb_isoftlimit = le32_to_cpu(d->dqb_isoftlimit);
m->dqb_curinodes = le32_to_cpu(d->dqb_curinodes);
m->dqb_itime = le64_to_cpu(d->dqb_itime);
- m->dqb_bhardlimit = le32_to_cpu(d->dqb_bhardlimit);
- m->dqb_bsoftlimit = le32_to_cpu(d->dqb_bsoftlimit);
+ m->dqb_bhardlimit = v2_qbtos(le32_to_cpu(d->dqb_bhardlimit));
+ m->dqb_bsoftlimit = v2_qbtos(le32_to_cpu(d->dqb_bsoftlimit));
m->dqb_curspace = le64_to_cpu(d->dqb_curspace);
m->dqb_btime = le64_to_cpu(d->dqb_btime);
+ /* We need to escape back all-zero structure */
+ memset(&empty, 0, sizeof(struct v2_disk_dqblk));
+ empty.dqb_itime = cpu_to_le64(1);
+ if (!memcmp(&empty, dp, sizeof(struct v2_disk_dqblk)))
+ m->dqb_itime = 0;
}
-static void mem2diskdqb(struct v2_disk_dqblk *d, struct mem_dqblk *m, qid_t id)
+static void v2_mem2diskdqb(void *dp, struct dquot *dquot)
{
+ struct v2_disk_dqblk *d = dp;
+ struct mem_dqblk *m = &dquot->dq_dqb;
+ struct qtree_mem_dqinfo *info =
+ sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv;
+
d->dqb_ihardlimit = cpu_to_le32(m->dqb_ihardlimit);
d->dqb_isoftlimit = cpu_to_le32(m->dqb_isoftlimit);
d->dqb_curinodes = cpu_to_le32(m->dqb_curinodes);
d->dqb_itime = cpu_to_le64(m->dqb_itime);
- d->dqb_bhardlimit = cpu_to_le32(m->dqb_bhardlimit);
- d->dqb_bsoftlimit = cpu_to_le32(m->dqb_bsoftlimit);
+ d->dqb_bhardlimit = cpu_to_le32(v2_stoqb(m->dqb_bhardlimit));
+ d->dqb_bsoftlimit = cpu_to_le32(v2_stoqb(m->dqb_bsoftlimit));
d->dqb_curspace = cpu_to_le64(m->dqb_curspace);
d->dqb_btime = cpu_to_le64(m->dqb_btime);
- d->dqb_id = cpu_to_le32(id);
-}
-
-static dqbuf_t getdqbuf(void)
-{
- dqbuf_t buf = kmalloc(V2_DQBLKSIZE, GFP_NOFS);
- if (!buf)
- printk(KERN_WARNING "VFS: Not enough memory for quota buffers.\n");
- return buf;
-}
-
-static inline void freedqbuf(dqbuf_t buf)
-{
- kfree(buf);
-}
-
-static inline ssize_t read_blk(struct super_block *sb, int type, uint blk, dqbuf_t buf)
-{
- memset(buf, 0, V2_DQBLKSIZE);
- return sb->s_op->quota_read(sb, type, (char *)buf,
- V2_DQBLKSIZE, blk << V2_DQBLKSIZE_BITS);
-}
-
-static inline ssize_t write_blk(struct super_block *sb, int type, uint blk, dqbuf_t buf)
-{
- return sb->s_op->quota_write(sb, type, (char *)buf,
- V2_DQBLKSIZE, blk << V2_DQBLKSIZE_BITS);
-}
-
-/* Remove empty block from list and return it */
-static int get_free_dqblk(struct super_block *sb, int type)
-{
- dqbuf_t buf = getdqbuf();
- struct mem_dqinfo *info = sb_dqinfo(sb, type);
- struct v2_disk_dqdbheader *dh = (struct v2_disk_dqdbheader *)buf;
- int ret, blk;
-
- if (!buf)
- return -ENOMEM;
- if (info->u.v2_i.dqi_free_blk) {
- blk = info->u.v2_i.dqi_free_blk;
- if ((ret = read_blk(sb, type, blk, buf)) < 0)
- goto out_buf;
- info->u.v2_i.dqi_free_blk = le32_to_cpu(dh->dqdh_next_free);
- }
- else {
- memset(buf, 0, V2_DQBLKSIZE);
- /* Assure block allocation... */
- if ((ret = write_blk(sb, type, info->u.v2_i.dqi_blocks, buf)) < 0)
- goto out_buf;
- blk = info->u.v2_i.dqi_blocks++;
- }
- mark_info_dirty(sb, type);
- ret = blk;
-out_buf:
- freedqbuf(buf);
- return ret;
-}
-
-/* Insert empty block to the list */
-static int put_free_dqblk(struct super_block *sb, int type, dqbuf_t buf, uint blk)
-{
- struct mem_dqinfo *info = sb_dqinfo(sb, type);
- struct v2_disk_dqdbheader *dh = (struct v2_disk_dqdbheader *)buf;
- int err;
-
- dh->dqdh_next_free = cpu_to_le32(info->u.v2_i.dqi_free_blk);
- dh->dqdh_prev_free = cpu_to_le32(0);
- dh->dqdh_entries = cpu_to_le16(0);
- info->u.v2_i.dqi_free_blk = blk;
- mark_info_dirty(sb, type);
- /* Some strange block. We had better leave it... */
- if ((err = write_blk(sb, type, blk, buf)) < 0)
- return err;
- return 0;
+ d->dqb_id = cpu_to_le32(dquot->dq_id);
+ if (qtree_entry_unused(info, dp))
+ d->dqb_itime = cpu_to_le64(1);
}
-/* Remove given block from the list of blocks with free entries */
-static int remove_free_dqentry(struct super_block *sb, int type, dqbuf_t buf, uint blk)
+static int v2_is_id(void *dp, struct dquot *dquot)
{
- dqbuf_t tmpbuf = getdqbuf();
- struct mem_dqinfo *info = sb_dqinfo(sb, type);
- struct v2_disk_dqdbheader *dh = (struct v2_disk_dqdbheader *)buf;
- uint nextblk = le32_to_cpu(dh->dqdh_next_free), prevblk = le32_to_cpu(dh->dqdh_prev_free);
- int err;
+ struct v2_disk_dqblk *d = dp;
+ struct qtree_mem_dqinfo *info =
+ sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv;
- if (!tmpbuf)
- return -ENOMEM;
- if (nextblk) {
- if ((err = read_blk(sb, type, nextblk, tmpbuf)) < 0)
- goto out_buf;
- ((struct v2_disk_dqdbheader *)tmpbuf)->dqdh_prev_free = dh->dqdh_prev_free;
- if ((err = write_blk(sb, type, nextblk, tmpbuf)) < 0)
- goto out_buf;
- }
- if (prevblk) {
- if ((err = read_blk(sb, type, prevblk, tmpbuf)) < 0)
- goto out_buf;
- ((struct v2_disk_dqdbheader *)tmpbuf)->dqdh_next_free = dh->dqdh_next_free;
- if ((err = write_blk(sb, type, prevblk, tmpbuf)) < 0)
- goto out_buf;
- }
- else {
- info->u.v2_i.dqi_free_entry = nextblk;
- mark_info_dirty(sb, type);
- }
- freedqbuf(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(sb, type, blk, buf) < 0)
- printk(KERN_ERR "VFS: Can't write block (%u) with free entries.\n", blk);
- return 0;
-out_buf:
- freedqbuf(tmpbuf);
- return err;
-}
-
-/* Insert given block to the beginning of list with free entries */
-static int insert_free_dqentry(struct super_block *sb, int type, dqbuf_t buf, uint blk)
-{
- dqbuf_t tmpbuf = getdqbuf();
- struct mem_dqinfo *info = sb_dqinfo(sb, type);
- struct v2_disk_dqdbheader *dh = (struct v2_disk_dqdbheader *)buf;
- int err;
-
- if (!tmpbuf)
- return -ENOMEM;
- dh->dqdh_next_free = cpu_to_le32(info->u.v2_i.dqi_free_entry);
- dh->dqdh_prev_free = cpu_to_le32(0);
- if ((err = write_blk(sb, type, blk, buf)) < 0)
- goto out_buf;
- if (info->u.v2_i.dqi_free_entry) {
- if ((err = read_blk(sb, type, info->u.v2_i.dqi_free_entry, tmpbuf)) < 0)
- goto out_buf;
- ((struct v2_disk_dqdbheader *)tmpbuf)->dqdh_prev_free = cpu_to_le32(blk);
- if ((err = write_blk(sb, type, info->u.v2_i.dqi_free_entry, tmpbuf)) < 0)
- goto out_buf;
- }
- freedqbuf(tmpbuf);
- info->u.v2_i.dqi_free_entry = blk;
- mark_info_dirty(sb, type);
- return 0;
-out_buf:
- freedqbuf(tmpbuf);
- return err;
-}
-
-/* Find space for dquot */
-static uint find_free_dqentry(struct dquot *dquot, int *err)
-{
- struct super_block *sb = dquot->dq_sb;
- struct mem_dqinfo *info = sb_dqopt(sb)->info+dquot->dq_type;
- uint blk, i;
- struct v2_disk_dqdbheader *dh;
- struct v2_disk_dqblk *ddquot;
- struct v2_disk_dqblk fakedquot;
- dqbuf_t buf;
-
- *err = 0;
- if (!(buf = getdqbuf())) {
- *err = -ENOMEM;
+ if (qtree_entry_unused(info, dp))
return 0;
- }
- dh = (struct v2_disk_dqdbheader *)buf;
- ddquot = GETENTRIES(buf);
- if (info->u.v2_i.dqi_free_entry) {
- blk = info->u.v2_i.dqi_free_entry;
- if ((*err = read_blk(sb, dquot->dq_type, blk, buf)) < 0)
- goto out_buf;
- }
- else {
- blk = get_free_dqblk(sb, dquot->dq_type);
- if ((int)blk < 0) {
- *err = blk;
- freedqbuf(buf);
- return 0;
- }
- memset(buf, 0, V2_DQBLKSIZE);
- /* This is enough as block is already zeroed and entry list is empty... */
- info->u.v2_i.dqi_free_entry = blk;
- mark_info_dirty(sb, dquot->dq_type);
- }
- if (le16_to_cpu(dh->dqdh_entries)+1 >= V2_DQSTRINBLK) /* Block will be full? */
- if ((*err = remove_free_dqentry(sb, dquot->dq_type, buf, blk)) < 0) {
- printk(KERN_ERR "VFS: find_free_dqentry(): Can't remove block (%u) from entry free list.\n", blk);
- goto out_buf;
- }
- dh->dqdh_entries = cpu_to_le16(le16_to_cpu(dh->dqdh_entries)+1);
- memset(&fakedquot, 0, sizeof(struct v2_disk_dqblk));
- /* Find free structure in block */
- for (i = 0; i < V2_DQSTRINBLK && memcmp(&fakedquot, ddquot+i, sizeof(struct v2_disk_dqblk)); i++);
-#ifdef __QUOTA_V2_PARANOIA
- if (i == V2_DQSTRINBLK) {
- printk(KERN_ERR "VFS: find_free_dqentry(): Data block full but it shouldn't.\n");
- *err = -EIO;
- goto out_buf;
- }
-#endif
- if ((*err = write_blk(sb, dquot->dq_type, blk, buf)) < 0) {
- printk(KERN_ERR "VFS: find_free_dqentry(): Can't write quota data block %u.\n", blk);
- goto out_buf;
- }
- dquot->dq_off = (blk<<V2_DQBLKSIZE_BITS)+sizeof(struct v2_disk_dqdbheader)+i*sizeof(struct v2_disk_dqblk);
- freedqbuf(buf);
- return blk;
-out_buf:
- freedqbuf(buf);
- return 0;
-}
-
-/* Insert reference to structure into the trie */
-static int do_insert_tree(struct dquot *dquot, uint *treeblk, int depth)
-{
- struct super_block *sb = dquot->dq_sb;
- dqbuf_t buf;
- int ret = 0, newson = 0, newact = 0;
- __le32 *ref;
- uint newblk;
-
- if (!(buf = getdqbuf()))
- return -ENOMEM;
- if (!*treeblk) {
- ret = get_free_dqblk(sb, dquot->dq_type);
- if (ret < 0)
- goto out_buf;
- *treeblk = ret;
- memset(buf, 0, V2_DQBLKSIZE);
- newact = 1;
- }
- else {
- if ((ret = read_blk(sb, dquot->dq_type, *treeblk, buf)) < 0) {
- printk(KERN_ERR "VFS: Can't read tree quota block %u.\n", *treeblk);
- goto out_buf;
- }
- }
- ref = (__le32 *)buf;
- newblk = le32_to_cpu(ref[GETIDINDEX(dquot->dq_id, depth)]);
- if (!newblk)
- newson = 1;
- if (depth == V2_DQTREEDEPTH-1) {
-#ifdef __QUOTA_V2_PARANOIA
- if (newblk) {
- printk(KERN_ERR "VFS: Inserting already present quota entry (block %u).\n", le32_to_cpu(ref[GETIDINDEX(dquot->dq_id, depth)]));
- ret = -EIO;
- goto out_buf;
- }
-#endif
- newblk = find_free_dqentry(dquot, &ret);
- }
- else
- ret = do_insert_tree(dquot, &newblk, depth+1);
- if (newson && ret >= 0) {
- ref[GETIDINDEX(dquot->dq_id, depth)] = cpu_to_le32(newblk);
- ret = write_blk(sb, dquot->dq_type, *treeblk, buf);
- }
- else if (newact && ret < 0)
- put_free_dqblk(sb, dquot->dq_type, buf, *treeblk);
-out_buf:
- freedqbuf(buf);
- return ret;
+ return le32_to_cpu(d->dqb_id) == dquot->dq_id;
}
-/* Wrapper for inserting quota structure into tree */
-static inline int dq_insert_tree(struct dquot *dquot)
+static int v2_read_dquot(struct dquot *dquot)
{
- int tmp = V2_DQTREEOFF;
- return do_insert_tree(dquot, &tmp, 0);
+ return qtree_read_dquot(sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv, dquot);
}
-/*
- * We don't have to be afraid of deadlocks as we never have quotas on quota files...
- */
static int v2_write_dquot(struct dquot *dquot)
{
- int type = dquot->dq_type;
- ssize_t ret;
- struct v2_disk_dqblk ddquot, empty;
-
- /* dq_off is guarded by dqio_sem */
- if (!dquot->dq_off)
- if ((ret = dq_insert_tree(dquot)) < 0) {
- printk(KERN_ERR "VFS: Error %zd occurred while creating quota.\n", ret);
- return ret;
- }
- spin_lock(&dq_data_lock);
- mem2diskdqb(&ddquot, &dquot->dq_dqb, dquot->dq_id);
- /* Argh... We may need to write structure full of zeroes but that would be
- * treated as an empty place by the rest of the code. Format change would
- * be definitely cleaner but the problems probably are not worth it */
- memset(&empty, 0, sizeof(struct v2_disk_dqblk));
- if (!memcmp(&empty, &ddquot, sizeof(struct v2_disk_dqblk)))
- ddquot.dqb_itime = cpu_to_le64(1);
- spin_unlock(&dq_data_lock);
- ret = dquot->dq_sb->s_op->quota_write(dquot->dq_sb, type,
- (char *)&ddquot, sizeof(struct v2_disk_dqblk), dquot->dq_off);
- if (ret != sizeof(struct v2_disk_dqblk)) {
- printk(KERN_WARNING "VFS: dquota write failed on dev %s\n", dquot->dq_sb->s_id);
- if (ret >= 0)
- ret = -ENOSPC;
- }
- else
- ret = 0;
- dqstats.writes++;
-
- return ret;
+ return qtree_write_dquot(sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv, dquot);
}
-/* Free dquot entry in data block */
-static int free_dqentry(struct dquot *dquot, uint blk)
-{
- struct super_block *sb = dquot->dq_sb;
- int type = dquot->dq_type;
- struct v2_disk_dqdbheader *dh;
- dqbuf_t buf = getdqbuf();
- int ret = 0;
-
- if (!buf)
- return -ENOMEM;
- if (dquot->dq_off >> V2_DQBLKSIZE_BITS != blk) {
- printk(KERN_ERR "VFS: Quota structure has offset to other "
- "block (%u) than it should (%u).\n", blk,
- (uint)(dquot->dq_off >> V2_DQBLKSIZE_BITS));
- goto out_buf;
- }
- if ((ret = read_blk(sb, type, blk, buf)) < 0) {
- printk(KERN_ERR "VFS: Can't read quota data block %u\n", blk);
- goto out_buf;
- }
- dh = (struct v2_disk_dqdbheader *)buf;
- dh->dqdh_entries = cpu_to_le16(le16_to_cpu(dh->dqdh_entries)-1);
- if (!le16_to_cpu(dh->dqdh_entries)) { /* Block got free? */
- if ((ret = remove_free_dqentry(sb, type, buf, blk)) < 0 ||
- (ret = put_free_dqblk(sb, type, buf, blk)) < 0) {
- printk(KERN_ERR "VFS: Can't move quota data block (%u) "
- "to free list.\n", blk);
- goto out_buf;
- }
- }
- else {
- memset(buf+(dquot->dq_off & ((1 << V2_DQBLKSIZE_BITS)-1)), 0,
- sizeof(struct v2_disk_dqblk));
- if (le16_to_cpu(dh->dqdh_entries) == V2_DQSTRINBLK-1) {
- /* Insert will write block itself */
- if ((ret = insert_free_dqentry(sb, type, buf, blk)) < 0) {
- printk(KERN_ERR "VFS: Can't insert quota data block (%u) to free entry list.\n", blk);
- goto out_buf;
- }
- }
- else
- if ((ret = write_blk(sb, type, blk, buf)) < 0) {
- printk(KERN_ERR "VFS: Can't write quota data "
- "block %u\n", blk);
- goto out_buf;
- }
- }
- dquot->dq_off = 0; /* Quota is now unattached */
-out_buf:
- freedqbuf(buf);
- return ret;
-}
-
-/* Remove reference to dquot from tree */
-static int remove_tree(struct dquot *dquot, uint *blk, int depth)
-{
- struct super_block *sb = dquot->dq_sb;
- int type = dquot->dq_type;
- dqbuf_t buf = getdqbuf();
- int ret = 0;
- uint newblk;
- __le32 *ref = (__le32 *)buf;
-
- if (!buf)
- return -ENOMEM;
- if ((ret = read_blk(sb, type, *blk, buf)) < 0) {
- printk(KERN_ERR "VFS: Can't read quota data block %u\n", *blk);
- goto out_buf;
- }
- newblk = le32_to_cpu(ref[GETIDINDEX(dquot->dq_id, depth)]);
- if (depth == V2_DQTREEDEPTH-1) {
- ret = free_dqentry(dquot, newblk);
- newblk = 0;
- }
- else
- ret = remove_tree(dquot, &newblk, depth+1);
- if (ret >= 0 && !newblk) {
- int i;
- ref[GETIDINDEX(dquot->dq_id, depth)] = cpu_to_le32(0);
- for (i = 0; i < V2_DQBLKSIZE && !buf[i]; i++); /* Block got empty? */
- /* Don't put the root block into the free block list */
- if (i == V2_DQBLKSIZE && *blk != V2_DQTREEOFF) {
- put_free_dqblk(sb, type, buf, *blk);
- *blk = 0;
- }
- else
- if ((ret = write_blk(sb, type, *blk, buf)) < 0)
- printk(KERN_ERR "VFS: Can't write quota tree "
- "block %u.\n", *blk);
- }
-out_buf:
- freedqbuf(buf);
- return ret;
-}
-
-/* Delete dquot from tree */
-static int v2_delete_dquot(struct dquot *dquot)
-{
- uint tmp = V2_DQTREEOFF;
-
- if (!dquot->dq_off) /* Even not allocated? */
- return 0;
- return remove_tree(dquot, &tmp, 0);
-}
-
-/* Find entry in block */
-static loff_t find_block_dqentry(struct dquot *dquot, uint blk)
-{
- dqbuf_t buf = getdqbuf();
- loff_t ret = 0;
- int i;
- struct v2_disk_dqblk *ddquot = GETENTRIES(buf);
-
- if (!buf)
- return -ENOMEM;
- if ((ret = read_blk(dquot->dq_sb, dquot->dq_type, blk, buf)) < 0) {
- printk(KERN_ERR "VFS: Can't read quota tree block %u.\n", blk);
- goto out_buf;
- }
- if (dquot->dq_id)
- for (i = 0; i < V2_DQSTRINBLK &&
- le32_to_cpu(ddquot[i].dqb_id) != dquot->dq_id; i++);
- else { /* ID 0 as a bit more complicated searching... */
- struct v2_disk_dqblk fakedquot;
-
- memset(&fakedquot, 0, sizeof(struct v2_disk_dqblk));
- for (i = 0; i < V2_DQSTRINBLK; i++)
- if (!le32_to_cpu(ddquot[i].dqb_id) &&
- memcmp(&fakedquot, ddquot+i, sizeof(struct v2_disk_dqblk)))
- break;
- }
- if (i == V2_DQSTRINBLK) {
- printk(KERN_ERR "VFS: Quota for id %u referenced "
- "but not present.\n", dquot->dq_id);
- ret = -EIO;
- goto out_buf;
- }
- else
- ret = (blk << V2_DQBLKSIZE_BITS) + sizeof(struct
- v2_disk_dqdbheader) + i * sizeof(struct v2_disk_dqblk);
-out_buf:
- freedqbuf(buf);
- return ret;
-}
-
-/* Find entry for given id in the tree */
-static loff_t find_tree_dqentry(struct dquot *dquot, uint blk, int depth)
-{
- dqbuf_t buf = getdqbuf();
- loff_t ret = 0;
- __le32 *ref = (__le32 *)buf;
-
- if (!buf)
- return -ENOMEM;
- if ((ret = read_blk(dquot->dq_sb, dquot->dq_type, blk, buf)) < 0) {
- printk(KERN_ERR "VFS: Can't read quota tree block %u.\n", blk);
- goto out_buf;
- }
- ret = 0;
- blk = le32_to_cpu(ref[GETIDINDEX(dquot->dq_id, depth)]);
- if (!blk) /* No reference? */
- goto out_buf;
- if (depth < V2_DQTREEDEPTH-1)
- ret = find_tree_dqentry(dquot, blk, depth+1);
- else
- ret = find_block_dqentry(dquot, blk);
-out_buf:
- freedqbuf(buf);
- return ret;
-}
-
-/* Find entry for given id in the tree - wrapper function */
-static inline loff_t find_dqentry(struct dquot *dquot)
-{
- return find_tree_dqentry(dquot, V2_DQTREEOFF, 0);
-}
-
-static int v2_read_dquot(struct dquot *dquot)
+static int v2_release_dquot(struct dquot *dquot)
{
- int type = dquot->dq_type;
- loff_t offset;
- struct v2_disk_dqblk ddquot, empty;
- int ret = 0;
-
-#ifdef __QUOTA_V2_PARANOIA
- /* Invalidated quota? */
- if (!dquot->dq_sb || !sb_dqopt(dquot->dq_sb)->files[type]) {
- printk(KERN_ERR "VFS: Quota invalidated while reading!\n");
- return -EIO;
- }
-#endif
- offset = find_dqentry(dquot);
- if (offset <= 0) { /* Entry not present? */
- if (offset < 0)
- printk(KERN_ERR "VFS: Can't read quota "
- "structure for id %u.\n", 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;
- }
- else {
- dquot->dq_off = offset;
- if ((ret = dquot->dq_sb->s_op->quota_read(dquot->dq_sb, type,
- (char *)&ddquot, sizeof(struct v2_disk_dqblk), offset))
- != sizeof(struct v2_disk_dqblk)) {
- if (ret >= 0)
- ret = -EIO;
- printk(KERN_ERR "VFS: Error while reading quota "
- "structure for id %u.\n", dquot->dq_id);
- memset(&ddquot, 0, sizeof(struct v2_disk_dqblk));
- }
- else {
- ret = 0;
- /* We need to escape back all-zero structure */
- memset(&empty, 0, sizeof(struct v2_disk_dqblk));
- empty.dqb_itime = cpu_to_le64(1);
- if (!memcmp(&empty, &ddquot, sizeof(struct v2_disk_dqblk)))
- ddquot.dqb_itime = 0;
- }
- disk2memdqb(&dquot->dq_dqb, &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);
- }
- dqstats.reads++;
-
- return ret;
+ return qtree_release_dquot(sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv, dquot);
}
-/* Check whether dquot should not be deleted. We know we are
- * the only one operating on dquot (thanks to dq_lock) */
-static int v2_release_dquot(struct dquot *dquot)
+static int v2_free_file_info(struct super_block *sb, int type)
{
- if (test_bit(DQ_FAKE_B, &dquot->dq_flags) && !(dquot->dq_dqb.dqb_curinodes | dquot->dq_dqb.dqb_curspace))
- return v2_delete_dquot(dquot);
+ kfree(sb_dqinfo(sb, type)->dqi_priv);
return 0;
}
.check_quota_file = v2_check_quota_file,
.read_file_info = v2_read_file_info,
.write_file_info = v2_write_file_info,
- .free_file_info = NULL,
+ .free_file_info = v2_free_file_info,
.read_dqblk = v2_read_dquot,
.commit_dqblk = v2_write_dquot,
.release_dqblk = v2_release_dquot,
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff