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-rw-r--r--lib/support/quotaio_tree.c687
1 files changed, 687 insertions, 0 deletions
diff --git a/lib/support/quotaio_tree.c b/lib/support/quotaio_tree.c
new file mode 100644
index 0000000..5910e63
--- /dev/null
+++ b/lib/support/quotaio_tree.c
@@ -0,0 +1,687 @@
+/*
+ * Implementation of new quotafile format
+ *
+ * Jan Kara <jack@suse.cz> - sponsored by SuSE CR
+ */
+
+#include "config.h"
+#include <sys/types.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "common.h"
+#include "quotaio_tree.h"
+#include "quotaio.h"
+
+typedef char *dqbuf_t;
+
+#define freedqbuf(buf) ext2fs_free_mem(&buf)
+
+static inline dqbuf_t getdqbuf(void)
+{
+ dqbuf_t buf;
+ if (ext2fs_get_memzero(QT_BLKSIZE, &buf)) {
+ log_err("Failed to allocate dqbuf");
+ return NULL;
+ }
+
+ return buf;
+}
+
+/* Is given dquot empty? */
+int qtree_entry_unused(struct qtree_mem_dqinfo *info, char *disk)
+{
+ unsigned int i;
+
+ for (i = 0; i < info->dqi_entry_size; i++)
+ if (disk[i])
+ return 0;
+ return 1;
+}
+
+int qtree_dqstr_in_blk(struct qtree_mem_dqinfo *info)
+{
+ return (QT_BLKSIZE - sizeof(struct qt_disk_dqdbheader)) /
+ info->dqi_entry_size;
+}
+
+static int get_index(qid_t id, int depth)
+{
+ return (id >> ((QT_TREEDEPTH - depth - 1) * 8)) & 0xff;
+}
+
+static inline void mark_quotafile_info_dirty(struct quota_handle *h)
+{
+ h->qh_io_flags |= IOFL_INFODIRTY;
+}
+
+/* Read given block */
+static void read_blk(struct quota_handle *h, unsigned int blk, dqbuf_t buf)
+{
+ int err;
+
+ err = h->e2fs_read(&h->qh_qf, blk << QT_BLKSIZE_BITS, buf,
+ QT_BLKSIZE);
+ if (err < 0)
+ log_err("Cannot read block %u: %s", blk, strerror(errno));
+ else if (err != QT_BLKSIZE)
+ memset(buf + err, 0, QT_BLKSIZE - err);
+}
+
+/* Write block */
+static int write_blk(struct quota_handle *h, unsigned int blk, dqbuf_t buf)
+{
+ int err;
+
+ err = h->e2fs_write(&h->qh_qf, blk << QT_BLKSIZE_BITS, buf,
+ QT_BLKSIZE);
+ if (err < 0 && errno != ENOSPC)
+ log_err("Cannot write block (%u): %s", blk, strerror(errno));
+ if (err != QT_BLKSIZE)
+ return -ENOSPC;
+ return 0;
+}
+
+/* Get free block in file (either from free list or create new one) */
+static int get_free_dqblk(struct quota_handle *h)
+{
+ dqbuf_t buf = getdqbuf();
+ struct qt_disk_dqdbheader *dh = (struct qt_disk_dqdbheader *)buf;
+ struct qtree_mem_dqinfo *info = &h->qh_info.u.v2_mdqi.dqi_qtree;
+ int blk;
+
+ if (!buf)
+ return -ENOMEM;
+
+ if (info->dqi_free_blk) {
+ blk = info->dqi_free_blk;
+ read_blk(h, blk, buf);
+ info->dqi_free_blk = ext2fs_le32_to_cpu(dh->dqdh_next_free);
+ } else {
+ memset(buf, 0, QT_BLKSIZE);
+ /* Assure block allocation... */
+ if (write_blk(h, info->dqi_blocks, buf) < 0) {
+ freedqbuf(buf);
+ log_err("Cannot allocate new quota block "
+ "(out of disk space).");
+ return -ENOSPC;
+ }
+ blk = info->dqi_blocks++;
+ }
+ mark_quotafile_info_dirty(h);
+ freedqbuf(buf);
+ return blk;
+}
+
+/* Put given block to free list */
+static void put_free_dqblk(struct quota_handle *h, dqbuf_t buf,
+ unsigned int blk)
+{
+ struct qt_disk_dqdbheader *dh = (struct qt_disk_dqdbheader *)buf;
+ struct qtree_mem_dqinfo *info = &h->qh_info.u.v2_mdqi.dqi_qtree;
+
+ dh->dqdh_next_free = ext2fs_cpu_to_le32(info->dqi_free_blk);
+ dh->dqdh_prev_free = ext2fs_cpu_to_le32(0);
+ dh->dqdh_entries = ext2fs_cpu_to_le16(0);
+ info->dqi_free_blk = blk;
+ mark_quotafile_info_dirty(h);
+ write_blk(h, blk, buf);
+}
+
+/* Remove given block from the list of blocks with free entries */
+static void remove_free_dqentry(struct quota_handle *h, dqbuf_t buf,
+ unsigned int blk)
+{
+ dqbuf_t tmpbuf = getdqbuf();
+ struct qt_disk_dqdbheader *dh = (struct qt_disk_dqdbheader *)buf;
+ unsigned int nextblk = ext2fs_le32_to_cpu(dh->dqdh_next_free), prevblk =
+
+ ext2fs_le32_to_cpu(dh->dqdh_prev_free);
+
+ if (!tmpbuf)
+ return;
+
+ if (nextblk) {
+ read_blk(h, nextblk, tmpbuf);
+ ((struct qt_disk_dqdbheader *)tmpbuf)->dqdh_prev_free =
+ dh->dqdh_prev_free;
+ write_blk(h, nextblk, tmpbuf);
+ }
+ if (prevblk) {
+ read_blk(h, prevblk, tmpbuf);
+ ((struct qt_disk_dqdbheader *)tmpbuf)->dqdh_next_free =
+ dh->dqdh_next_free;
+ write_blk(h, prevblk, tmpbuf);
+ } else {
+ h->qh_info.u.v2_mdqi.dqi_qtree.dqi_free_entry = nextblk;
+ mark_quotafile_info_dirty(h);
+ }
+ freedqbuf(tmpbuf);
+ dh->dqdh_next_free = dh->dqdh_prev_free = ext2fs_cpu_to_le32(0);
+ write_blk(h, blk, buf); /* No matter whether write succeeds
+ * block is out of list */
+}
+
+/* Insert given block to the beginning of list with free entries */
+static void insert_free_dqentry(struct quota_handle *h, dqbuf_t buf,
+ unsigned int blk)
+{
+ dqbuf_t tmpbuf = getdqbuf();
+ struct qt_disk_dqdbheader *dh = (struct qt_disk_dqdbheader *)buf;
+ struct qtree_mem_dqinfo *info = &h->qh_info.u.v2_mdqi.dqi_qtree;
+
+ if (!tmpbuf)
+ return;
+
+ dh->dqdh_next_free = ext2fs_cpu_to_le32(info->dqi_free_entry);
+ dh->dqdh_prev_free = ext2fs_cpu_to_le32(0);
+ write_blk(h, blk, buf);
+ if (info->dqi_free_entry) {
+ read_blk(h, info->dqi_free_entry, tmpbuf);
+ ((struct qt_disk_dqdbheader *)tmpbuf)->dqdh_prev_free =
+ ext2fs_cpu_to_le32(blk);
+ write_blk(h, info->dqi_free_entry, tmpbuf);
+ }
+ freedqbuf(tmpbuf);
+ info->dqi_free_entry = blk;
+ mark_quotafile_info_dirty(h);
+}
+
+/* Find space for dquot */
+static unsigned int find_free_dqentry(struct quota_handle *h,
+ struct dquot *dquot, int *err)
+{
+ int blk, i;
+ struct qt_disk_dqdbheader *dh;
+ struct qtree_mem_dqinfo *info = &h->qh_info.u.v2_mdqi.dqi_qtree;
+ char *ddquot;
+ dqbuf_t buf;
+
+ *err = 0;
+ buf = getdqbuf();
+ if (!buf) {
+ *err = -ENOMEM;
+ return 0;
+ }
+
+ dh = (struct qt_disk_dqdbheader *)buf;
+ if (info->dqi_free_entry) {
+ blk = info->dqi_free_entry;
+ read_blk(h, blk, buf);
+ } else {
+ blk = get_free_dqblk(h);
+ if (blk < 0) {
+ freedqbuf(buf);
+ *err = blk;
+ return 0;
+ }
+ memset(buf, 0, QT_BLKSIZE);
+ info->dqi_free_entry = blk;
+ mark_quotafile_info_dirty(h);
+ }
+
+ /* Block will be full? */
+ if (ext2fs_le16_to_cpu(dh->dqdh_entries) + 1 >=
+ qtree_dqstr_in_blk(info))
+ remove_free_dqentry(h, buf, blk);
+
+ dh->dqdh_entries =
+ ext2fs_cpu_to_le16(ext2fs_le16_to_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) && !qtree_entry_unused(info, ddquot);
+ i++)
+ ddquot += info->dqi_entry_size;
+
+ if (i == qtree_dqstr_in_blk(info))
+ log_err("find_free_dqentry(): Data block full unexpectedly.");
+
+ write_blk(h, blk, buf);
+ dquot->dq_dqb.u.v2_mdqb.dqb_off =
+ (blk << QT_BLKSIZE_BITS) + sizeof(struct qt_disk_dqdbheader) +
+ i * info->dqi_entry_size;
+ freedqbuf(buf);
+ return blk;
+}
+
+/* Insert reference to structure into the trie */
+static int do_insert_tree(struct quota_handle *h, struct dquot *dquot,
+ unsigned int * treeblk, int depth)
+{
+ dqbuf_t buf;
+ int newson = 0, newact = 0;
+ __le32 *ref;
+ unsigned int newblk;
+ int ret = 0;
+
+ log_debug("inserting in tree: treeblk=%u, depth=%d", *treeblk, depth);
+ buf = getdqbuf();
+ if (!buf)
+ return -ENOMEM;
+
+ if (!*treeblk) {
+ ret = get_free_dqblk(h);
+ if (ret < 0)
+ goto out_buf;
+ *treeblk = ret;
+ memset(buf, 0, QT_BLKSIZE);
+ newact = 1;
+ } else {
+ read_blk(h, *treeblk, buf);
+ }
+
+ ref = (__le32 *) buf;
+ newblk = ext2fs_le32_to_cpu(ref[get_index(dquot->dq_id, depth)]);
+ if (!newblk)
+ newson = 1;
+ if (depth == QT_TREEDEPTH - 1) {
+ if (newblk)
+ log_err("Inserting already present quota entry "
+ "(block %u).",
+ ref[get_index(dquot->dq_id, depth)]);
+ newblk = find_free_dqentry(h, dquot, &ret);
+ } else {
+ ret = do_insert_tree(h, dquot, &newblk, depth + 1);
+ }
+
+ if (newson && ret >= 0) {
+ ref[get_index(dquot->dq_id, depth)] =
+ ext2fs_cpu_to_le32(newblk);
+ write_blk(h, *treeblk, buf);
+ } else if (newact && ret < 0) {
+ put_free_dqblk(h, buf, *treeblk);
+ }
+
+out_buf:
+ freedqbuf(buf);
+ return ret;
+}
+
+/* Wrapper for inserting quota structure into tree */
+static void dq_insert_tree(struct quota_handle *h, struct dquot *dquot)
+{
+ unsigned int tmp = QT_TREEOFF;
+
+ if (do_insert_tree(h, dquot, &tmp, 0) < 0)
+ log_err("Cannot write quota (id %u): %s",
+ (unsigned int) dquot->dq_id, strerror(errno));
+}
+
+/* Write dquot to file */
+void qtree_write_dquot(struct dquot *dquot)
+{
+ errcode_t retval;
+ unsigned int ret;
+ char *ddquot;
+ struct quota_handle *h = dquot->dq_h;
+ struct qtree_mem_dqinfo *info =
+ &dquot->dq_h->qh_info.u.v2_mdqi.dqi_qtree;
+ log_debug("writing ddquot 1: off=%llu, info->dqi_entry_size=%u",
+ dquot->dq_dqb.u.v2_mdqb.dqb_off,
+ info->dqi_entry_size);
+ retval = ext2fs_get_mem(info->dqi_entry_size, &ddquot);
+ if (retval) {
+ errno = ENOMEM;
+ log_err("Quota write failed (id %u): %s",
+ (unsigned int)dquot->dq_id, strerror(errno));
+ return;
+ }
+ memset(ddquot, 0, info->dqi_entry_size);
+
+ if (!dquot->dq_dqb.u.v2_mdqb.dqb_off)
+ dq_insert_tree(dquot->dq_h, dquot);
+ info->dqi_ops->mem2disk_dqblk(ddquot, dquot);
+ log_debug("writing ddquot 2: off=%llu, info->dqi_entry_size=%u",
+ dquot->dq_dqb.u.v2_mdqb.dqb_off,
+ info->dqi_entry_size);
+ ret = h->e2fs_write(&h->qh_qf, dquot->dq_dqb.u.v2_mdqb.dqb_off, ddquot,
+ info->dqi_entry_size);
+
+ if (ret != info->dqi_entry_size) {
+ if (ret > 0)
+ errno = ENOSPC;
+ log_err("Quota write failed (id %u): %s",
+ (unsigned int)dquot->dq_id, strerror(errno));
+ }
+ ext2fs_free_mem(&ddquot);
+}
+
+/* Free dquot entry in data block */
+static void free_dqentry(struct quota_handle *h, struct dquot *dquot,
+ unsigned int blk)
+{
+ struct qt_disk_dqdbheader *dh;
+ struct qtree_mem_dqinfo *info = &h->qh_info.u.v2_mdqi.dqi_qtree;
+ dqbuf_t buf = getdqbuf();
+
+ if (!buf)
+ return;
+
+ if (dquot->dq_dqb.u.v2_mdqb.dqb_off >> QT_BLKSIZE_BITS != blk)
+ log_err("Quota structure has offset to other block (%u) "
+ "than it should (%u).", blk,
+ (unsigned int) (dquot->dq_dqb.u.v2_mdqb.dqb_off >>
+ QT_BLKSIZE_BITS));
+
+ read_blk(h, blk, buf);
+ dh = (struct qt_disk_dqdbheader *)buf;
+ dh->dqdh_entries =
+ ext2fs_cpu_to_le16(ext2fs_le16_to_cpu(dh->dqdh_entries) - 1);
+
+ if (!ext2fs_le16_to_cpu(dh->dqdh_entries)) { /* Block got free? */
+ remove_free_dqentry(h, buf, blk);
+ put_free_dqblk(h, buf, blk);
+ } else {
+ memset(buf + (dquot->dq_dqb.u.v2_mdqb.dqb_off &
+ ((1 << QT_BLKSIZE_BITS) - 1)),
+ 0, info->dqi_entry_size);
+
+ /* First free entry? */
+ if (ext2fs_le16_to_cpu(dh->dqdh_entries) ==
+ qtree_dqstr_in_blk(info) - 1)
+ /* This will also write data block */
+ insert_free_dqentry(h, buf, blk);
+ else
+ write_blk(h, blk, buf);
+ }
+ dquot->dq_dqb.u.v2_mdqb.dqb_off = 0;
+ freedqbuf(buf);
+}
+
+/* Remove reference to dquot from tree */
+static void remove_tree(struct quota_handle *h, struct dquot *dquot,
+ unsigned int * blk, int depth)
+{
+ dqbuf_t buf = getdqbuf();
+ unsigned int newblk;
+ __le32 *ref = (__le32 *) buf;
+
+ if (!buf)
+ return;
+
+ read_blk(h, *blk, buf);
+ newblk = ext2fs_le32_to_cpu(ref[get_index(dquot->dq_id, depth)]);
+ if (depth == QT_TREEDEPTH - 1) {
+ free_dqentry(h, dquot, newblk);
+ newblk = 0;
+ } else {
+ remove_tree(h, dquot, &newblk, depth + 1);
+ }
+
+ if (!newblk) {
+ int i;
+
+ ref[get_index(dquot->dq_id, depth)] = ext2fs_cpu_to_le32(0);
+
+ /* Block got empty? */
+ for (i = 0; i < QT_BLKSIZE && !buf[i]; i++);
+
+ /* Don't put the root block into the free block list */
+ if (i == QT_BLKSIZE && *blk != QT_TREEOFF) {
+ put_free_dqblk(h, buf, *blk);
+ *blk = 0;
+ } else {
+ write_blk(h, *blk, buf);
+ }
+ }
+ freedqbuf(buf);
+}
+
+/* Delete dquot from tree */
+void qtree_delete_dquot(struct dquot *dquot)
+{
+ unsigned int tmp = QT_TREEOFF;
+
+ if (!dquot->dq_dqb.u.v2_mdqb.dqb_off) /* Even not allocated? */
+ return;
+ remove_tree(dquot->dq_h, dquot, &tmp, 0);
+}
+
+/* Find entry in block */
+static ext2_loff_t find_block_dqentry(struct quota_handle *h,
+ struct dquot *dquot, unsigned int blk)
+{
+ struct qtree_mem_dqinfo *info = &h->qh_info.u.v2_mdqi.dqi_qtree;
+ dqbuf_t buf = getdqbuf();
+ int i;
+ char *ddquot = buf + sizeof(struct qt_disk_dqdbheader);
+
+ if (!buf)
+ return -ENOMEM;
+
+ read_blk(h, blk, buf);
+ for (i = 0;
+ i < qtree_dqstr_in_blk(info) && !info->dqi_ops->is_id(ddquot, dquot);
+ i++)
+ ddquot += info->dqi_entry_size;
+
+ if (i == qtree_dqstr_in_blk(info))
+ log_err("Quota for id %u referenced but not present.",
+ dquot->dq_id);
+ freedqbuf(buf);
+ return (blk << QT_BLKSIZE_BITS) + sizeof(struct qt_disk_dqdbheader) +
+ i * info->dqi_entry_size;
+}
+
+/* Find entry for given id in the tree */
+static ext2_loff_t find_tree_dqentry(struct quota_handle *h,
+ struct dquot *dquot,
+ unsigned int blk, int depth)
+{
+ dqbuf_t buf = getdqbuf();
+ ext2_loff_t ret = 0;
+ __le32 *ref = (__le32 *) buf;
+
+ if (!buf)
+ return -ENOMEM;
+
+ read_blk(h, blk, buf);
+ ret = 0;
+ blk = ext2fs_le32_to_cpu(ref[get_index(dquot->dq_id, depth)]);
+ if (!blk) /* No reference? */
+ goto out_buf;
+ if (depth < QT_TREEDEPTH - 1)
+ ret = find_tree_dqentry(h, dquot, blk, depth + 1);
+ else
+ ret = find_block_dqentry(h, dquot, blk);
+out_buf:
+ freedqbuf(buf);
+ return ret;
+}
+
+/* Find entry for given id in the tree - wrapper function */
+static inline ext2_loff_t find_dqentry(struct quota_handle *h,
+ struct dquot *dquot)
+{
+ return find_tree_dqentry(h, dquot, QT_TREEOFF, 0);
+}
+
+/*
+ * Read dquot from disk.
+ */
+struct dquot *qtree_read_dquot(struct quota_handle *h, qid_t id)
+{
+ struct qtree_mem_dqinfo *info = &h->qh_info.u.v2_mdqi.dqi_qtree;
+ ext2_loff_t offset;
+ unsigned int ret;
+ char *ddquot;
+ struct dquot *dquot = get_empty_dquot();
+
+ if (!dquot)
+ return NULL;
+ if (ext2fs_get_mem(info->dqi_entry_size, &ddquot)) {
+ ext2fs_free_mem(&dquot);
+ return NULL;
+ }
+
+ dquot->dq_id = id;
+ dquot->dq_h = h;
+ dquot->dq_dqb.u.v2_mdqb.dqb_off = 0;
+ memset(&dquot->dq_dqb, 0, sizeof(struct util_dqblk));
+
+ offset = find_dqentry(h, dquot);
+ if (offset > 0) {
+ dquot->dq_dqb.u.v2_mdqb.dqb_off = offset;
+ ret = h->e2fs_read(&h->qh_qf, offset, ddquot,
+ info->dqi_entry_size);
+ if (ret != info->dqi_entry_size) {
+ if (ret > 0)
+ errno = EIO;
+ log_err("Cannot read quota structure for id %u: %s",
+ dquot->dq_id, strerror(errno));
+ }
+ info->dqi_ops->disk2mem_dqblk(dquot, ddquot);
+ }
+ ext2fs_free_mem(&ddquot);
+ return dquot;
+}
+
+static int check_reference(struct quota_handle *h, unsigned int blk)
+{
+ if (blk >= h->qh_info.u.v2_mdqi.dqi_qtree.dqi_blocks) {
+ log_err("Illegal reference (%u >= %u) in %s quota file",
+ blk, h->qh_info.u.v2_mdqi.dqi_qtree.dqi_blocks,
+ quota_type2name(h->qh_type));
+ return -1;
+ }
+ return 0;
+}
+
+/*
+ * Scan all dquots in file and call callback on each
+ */
+#define set_bit(bmp, ind) ((bmp)[(ind) >> 3] |= (1 << ((ind) & 7)))
+#define get_bit(bmp, ind) ((bmp)[(ind) >> 3] & (1 << ((ind) & 7)))
+
+static int report_block(struct dquot *dquot, unsigned int blk, char *bitmap,
+ int (*process_dquot) (struct dquot *, void *),
+ void *data)
+{
+ struct qtree_mem_dqinfo *info =
+ &dquot->dq_h->qh_info.u.v2_mdqi.dqi_qtree;
+ dqbuf_t buf = getdqbuf();
+ struct qt_disk_dqdbheader *dh;
+ char *ddata;
+ int entries, i;
+
+ if (!buf)
+ return -1;
+
+ set_bit(bitmap, blk);
+ read_blk(dquot->dq_h, blk, buf);
+ dh = (struct qt_disk_dqdbheader *)buf;
+ ddata = buf + sizeof(struct qt_disk_dqdbheader);
+ entries = ext2fs_le16_to_cpu(dh->dqdh_entries);
+ for (i = 0; i < qtree_dqstr_in_blk(info);
+ i++, ddata += info->dqi_entry_size)
+ if (!qtree_entry_unused(info, ddata)) {
+ dquot->dq_dqb.u.v2_mdqb.dqb_off =
+ (blk << QT_BLKSIZE_BITS) +
+ sizeof(struct qt_disk_dqdbheader) +
+ i * info->dqi_entry_size;
+ info->dqi_ops->disk2mem_dqblk(dquot, ddata);
+ if (process_dquot(dquot, data) < 0)
+ break;
+ }
+ freedqbuf(buf);
+ return entries;
+}
+
+static int report_tree(struct dquot *dquot, unsigned int blk, int depth,
+ char *bitmap,
+ int (*process_dquot) (struct dquot *, void *),
+ void *data)
+{
+ int entries = 0, ret, i;
+ dqbuf_t buf = getdqbuf();
+ __le32 *ref = (__le32 *) buf;
+
+ if (!buf)
+ return -1;
+
+ read_blk(dquot->dq_h, blk, buf);
+ if (depth == QT_TREEDEPTH - 1) {
+ for (i = 0; i < QT_BLKSIZE >> 2; i++) {
+ blk = ext2fs_le32_to_cpu(ref[i]);
+ if (check_reference(dquot->dq_h, blk)) {
+ entries = -1;
+ goto errout;
+ }
+ if (blk && !get_bit(bitmap, blk)) {
+ ret = report_block(dquot, blk, bitmap,
+ process_dquot, data);
+ if (ret < 0) {
+ entries = ret;
+ goto errout;
+ }
+ entries += ret;
+ }
+ }
+ } else {
+ for (i = 0; i < QT_BLKSIZE >> 2; i++) {
+ blk = ext2fs_le32_to_cpu(ref[i]);
+ if (blk) {
+ if (check_reference(dquot->dq_h, blk)) {
+ entries = -1;
+ goto errout;
+ }
+ ret = report_tree(dquot, blk, depth + 1,
+ bitmap, process_dquot,
+ data);
+ if (ret < 0) {
+ entries = ret;
+ goto errout;
+ }
+ entries += ret;
+ }
+ }
+ }
+errout:
+ freedqbuf(buf);
+ return entries;
+}
+
+static unsigned int find_set_bits(char *bmp, int blocks)
+{
+ unsigned int used = 0;
+ int i;
+
+ for (i = 0; i < blocks; i++)
+ if (get_bit(bmp, i))
+ used++;
+ return used;
+}
+
+int qtree_scan_dquots(struct quota_handle *h,
+ int (*process_dquot) (struct dquot *, void *),
+ void *data)
+{
+ int ret;
+ char *bitmap;
+ struct v2_mem_dqinfo *v2info = &h->qh_info.u.v2_mdqi;
+ struct qtree_mem_dqinfo *info = &v2info->dqi_qtree;
+ struct dquot *dquot = get_empty_dquot();
+
+ if (!dquot)
+ return -1;
+
+ dquot->dq_h = h;
+ if (ext2fs_get_memzero((info->dqi_blocks + 7) >> 3, &bitmap)) {
+ ext2fs_free_mem(&dquot);
+ return -1;
+ }
+ ret = report_tree(dquot, QT_TREEOFF, 0, bitmap, process_dquot, data);
+ if (ret < 0)
+ goto errout;
+ v2info->dqi_used_entries = ret;
+ v2info->dqi_data_blocks = find_set_bits(bitmap, info->dqi_blocks);
+ ret = 0;
+errout:
+ ext2fs_free_mem(&bitmap);
+ ext2fs_free_mem(&dquot);
+ return ret;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-04 15:55:32 +0000