Adding upstream version 1.47.0.upstream/1.47.0upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 707 insertions, 0 deletions

diff --git a/lib/support/mkquota.c b/lib/support/mkquota.c
new file mode 100644
index 0000000..9339c99
--- /dev/null
+++ b/lib/support/mkquota.c
@@ -0,0 +1,707 @@
+/*
+ * mkquota.c --- create quota files for a filesystem
+ *
+ * Aditya Kali <adityakali@google.com>
+ */
+#include "config.h"
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <errno.h>
+#include <string.h>
+#include <fcntl.h>
+
+#include "ext2fs/ext2_fs.h"
+#include "ext2fs/ext2fs.h"
+#include "e2p/e2p.h"
+
+#include "quotaio.h"
+#include "quotaio_v2.h"
+#include "quotaio_tree.h"
+#include "common.h"
+#include "dict.h"
+
+/* Needed for architectures where sizeof(int) != sizeof(void *) */
+#define UINT_TO_VOIDPTR(val)  ((void *)(intptr_t)(val))
+#define VOIDPTR_TO_UINT(ptr)  ((unsigned int)(intptr_t)(ptr))
+
+#if DEBUG_QUOTA
+static void print_inode(struct ext2_inode *inode)
+{
+	if (!inode)
+		return;
+
+	fprintf(stderr, "  i_mode = %d\n", inode->i_mode);
+	fprintf(stderr, "  i_uid = %d\n", inode->i_uid);
+	fprintf(stderr, "  i_size = %d\n", inode->i_size);
+	fprintf(stderr, "  i_atime = %d\n", inode->i_atime);
+	fprintf(stderr, "  i_ctime = %d\n", inode->i_ctime);
+	fprintf(stderr, "  i_mtime = %d\n", inode->i_mtime);
+	fprintf(stderr, "  i_dtime = %d\n", inode->i_dtime);
+	fprintf(stderr, "  i_gid = %d\n", inode->i_gid);
+	fprintf(stderr, "  i_links_count = %d\n", inode->i_links_count);
+	fprintf(stderr, "  i_blocks = %d\n", inode->i_blocks);
+	fprintf(stderr, "  i_flags = %d\n", inode->i_flags);
+
+	return;
+}
+
+static void print_dquot(const char *desc, struct dquot *dq)
+{
+	if (desc)
+		fprintf(stderr, "%s: ", desc);
+	fprintf(stderr, "%u %lld:%lld:%lld %lld:%lld:%lld\n",
+		dq->dq_id, (long long) dq->dq_dqb.dqb_curspace,
+		(long long) dq->dq_dqb.dqb_bsoftlimit,
+		(long long) dq->dq_dqb.dqb_bhardlimit,
+		(long long) dq->dq_dqb.dqb_curinodes,
+		(long long) dq->dq_dqb.dqb_isoftlimit,
+		(long long) dq->dq_dqb.dqb_ihardlimit);
+}
+#else
+static void print_dquot(const char *desc EXT2FS_ATTR((unused)),
+			struct dquot *dq EXT2FS_ATTR((unused)))
+{
+}
+#endif
+
+/*
+ * Returns 0 if not able to find the quota file, otherwise returns its
+ * inode number.
+ */
+int quota_file_exists(ext2_filsys fs, enum quota_type qtype)
+{
+	char qf_name[256];
+	errcode_t ret;
+	ext2_ino_t ino;
+
+	if (qtype >= MAXQUOTAS)
+		return -EINVAL;
+
+	quota_get_qf_name(qtype, QFMT_VFS_V1, qf_name);
+
+	ret = ext2fs_lookup(fs, EXT2_ROOT_INO, qf_name, strlen(qf_name), 0,
+			    &ino);
+	if (ret)
+		return 0;
+
+	return ino;
+}
+
+/*
+ * Set the value for reserved quota inode number field in superblock.
+ */
+void quota_set_sb_inum(ext2_filsys fs, ext2_ino_t ino, enum quota_type qtype)
+{
+	ext2_ino_t *inump;
+
+	inump = quota_sb_inump(fs->super, qtype);
+
+	log_debug("setting quota ino in superblock: ino=%u, type=%d", ino,
+		 qtype);
+	if (inump == NULL)
+		return;
+	*inump = ino;
+	ext2fs_mark_super_dirty(fs);
+}
+
+errcode_t quota_remove_inode(ext2_filsys fs, enum quota_type qtype)
+{
+	ext2_ino_t qf_ino;
+	errcode_t	retval;
+
+	retval = ext2fs_read_bitmaps(fs);
+	if (retval) {
+		log_debug("Couldn't read bitmaps: %s", error_message(retval));
+		return retval;
+	}
+
+	qf_ino = *quota_sb_inump(fs->super, qtype);
+	if (qf_ino == 0)
+		return 0;
+	retval = quota_inode_truncate(fs, qf_ino);
+	if (retval)
+		return retval;
+	if (qf_ino >= EXT2_FIRST_INODE(fs->super)) {
+		struct ext2_inode inode;
+
+		retval = ext2fs_read_inode(fs, qf_ino, &inode);
+		if (!retval) {
+			memset(&inode, 0, sizeof(struct ext2_inode));
+			ext2fs_write_inode(fs, qf_ino, &inode);
+		}
+		ext2fs_inode_alloc_stats2(fs, qf_ino, -1, 0);
+		ext2fs_mark_ib_dirty(fs);
+
+	}
+	quota_set_sb_inum(fs, 0, qtype);
+
+	ext2fs_mark_super_dirty(fs);
+	fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
+	retval = ext2fs_write_bitmaps(fs);
+	if (retval) {
+		log_debug("Couldn't write bitmaps: %s", error_message(retval));
+		return retval;
+	}
+	return 0;
+}
+
+static void write_dquots(dict_t *dict, struct quota_handle *qh)
+{
+	dnode_t		*n;
+	struct dquot	*dq;
+
+	for (n = dict_first(dict); n; n = dict_next(dict, n)) {
+		dq = dnode_get(n);
+		if (dq) {
+			print_dquot("write", dq);
+			dq->dq_h = qh;
+			update_grace_times(dq);
+			qh->qh_ops->commit_dquot(dq);
+		}
+	}
+}
+
+errcode_t quota_write_inode(quota_ctx_t qctx, unsigned int qtype_bits)
+{
+	int		retval = 0;
+	enum quota_type	qtype;
+	dict_t		*dict;
+	ext2_filsys	fs;
+	struct quota_handle *h = NULL;
+	int		fmt = QFMT_VFS_V1;
+
+	if (!qctx)
+		return 0;
+
+	fs = qctx->fs;
+	retval = ext2fs_get_mem(sizeof(struct quota_handle), &h);
+	if (retval) {
+		log_debug("Unable to allocate quota handle: %s",
+			error_message(retval));
+		goto out;
+	}
+
+	retval = ext2fs_read_bitmaps(fs);
+	if (retval) {
+		log_debug("Couldn't read bitmaps: %s", error_message(retval));
+		goto out;
+	}
+
+	for (qtype = 0; qtype < MAXQUOTAS; qtype++) {
+		if (((1 << qtype) & qtype_bits) == 0)
+			continue;
+
+		dict = qctx->quota_dict[qtype];
+		if (!dict)
+			continue;
+
+		retval = quota_file_create(h, fs, qtype, fmt);
+		if (retval) {
+			log_debug("Cannot initialize io on quotafile: %s",
+				  error_message(retval));
+			goto out;
+		}
+
+		write_dquots(dict, h);
+		retval = quota_file_close(qctx, h);
+		if (retval) {
+			log_debug("Cannot finish IO on new quotafile: %s",
+				  strerror(errno));
+			if (h->qh_qf.e2_file)
+				ext2fs_file_close(h->qh_qf.e2_file);
+			(void) quota_inode_truncate(fs, h->qh_qf.ino);
+			goto out;
+		}
+
+		/* Set quota inode numbers in superblock. */
+		quota_set_sb_inum(fs, h->qh_qf.ino, qtype);
+		ext2fs_mark_super_dirty(fs);
+		ext2fs_mark_bb_dirty(fs);
+		fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
+	}
+
+	retval = ext2fs_write_bitmaps(fs);
+	if (retval) {
+		log_debug("Couldn't write bitmaps: %s", error_message(retval));
+		goto out;
+	}
+out:
+	if (h)
+		ext2fs_free_mem(&h);
+	return retval;
+}
+
+/******************************************************************/
+/* Helper functions for computing quota in memory.                */
+/******************************************************************/
+
+static int dict_uint_cmp(const void *cmp_ctx EXT2FS_ATTR((unused)),
+			 const void *a, const void *b)
+{
+	unsigned int	c, d;
+
+	c = VOIDPTR_TO_UINT(a);
+	d = VOIDPTR_TO_UINT(b);
+
+	if (c == d)
+		return 0;
+	else if (c > d)
+		return 1;
+	else
+		return -1;
+}
+
+static inline int project_quota_valid(quota_ctx_t qctx)
+{
+	return (EXT2_INODE_SIZE(qctx->fs->super) > EXT2_GOOD_OLD_INODE_SIZE);
+}
+
+static inline qid_t get_qid(struct ext2_inode_large *inode, enum quota_type qtype)
+{
+	unsigned int inode_size;
+
+	switch (qtype) {
+	case USRQUOTA:
+		return inode_uid(*inode);
+	case GRPQUOTA:
+		return inode_gid(*inode);
+	case PRJQUOTA:
+		inode_size = EXT2_GOOD_OLD_INODE_SIZE +
+			inode->i_extra_isize;
+		if (inode_includes(inode_size, i_projid))
+			return inode_projid(*inode);
+		return 0;
+	default:
+		return 0;
+	}
+
+	return 0;
+}
+
+static void quota_dnode_free(dnode_t *node,
+			     void *context EXT2FS_ATTR((unused)))
+{
+	void *ptr = node ? dnode_get(node) : 0;
+
+	ext2fs_free_mem(&ptr);
+	free(node);
+}
+
+/*
+ * Set up the quota tracking data structures.
+ */
+errcode_t quota_init_context(quota_ctx_t *qctx, ext2_filsys fs,
+			     unsigned int qtype_bits)
+{
+	errcode_t err;
+	dict_t	*dict;
+	quota_ctx_t ctx;
+	enum quota_type	qtype;
+
+	err = ext2fs_get_mem(sizeof(struct quota_ctx), &ctx);
+	if (err) {
+		log_debug("Failed to allocate quota context");
+		return err;
+	}
+
+	memset(ctx, 0, sizeof(struct quota_ctx));
+	for (qtype = 0; qtype < MAXQUOTAS; qtype++) {
+		ctx->quota_file[qtype] = NULL;
+		if (qtype_bits) {
+			if (((1 << qtype) & qtype_bits) == 0)
+				continue;
+		} else {
+			if (*quota_sb_inump(fs->super, qtype) == 0)
+				continue;
+		}
+		err = ext2fs_get_mem(sizeof(dict_t), &dict);
+		if (err) {
+			log_debug("Failed to allocate dictionary");
+			quota_release_context(&ctx);
+			return err;
+		}
+		ctx->quota_dict[qtype] = dict;
+		dict_init(dict, DICTCOUNT_T_MAX, dict_uint_cmp);
+		dict_set_allocator(dict, NULL, quota_dnode_free, NULL);
+	}
+
+	ctx->fs = fs;
+	*qctx = ctx;
+	return 0;
+}
+
+void quota_release_context(quota_ctx_t *qctx)
+{
+	errcode_t err;
+	dict_t	*dict;
+	enum quota_type	qtype;
+	quota_ctx_t ctx;
+
+	if (!qctx)
+		return;
+
+	ctx = *qctx;
+	for (qtype = 0; qtype < MAXQUOTAS; qtype++) {
+		dict = ctx->quota_dict[qtype];
+		ctx->quota_dict[qtype] = 0;
+		if (dict) {
+			dict_free_nodes(dict);
+			free(dict);
+		}
+		if (ctx->quota_file[qtype]) {
+			err = quota_file_close(ctx, ctx->quota_file[qtype]);
+			if (err) {
+				log_err("Cannot close quotafile: %s",
+					strerror(errno));
+				ext2fs_free_mem(&ctx->quota_file[qtype]);
+			}
+		}
+	}
+	*qctx = NULL;
+	free(ctx);
+}
+
+static struct dquot *get_dq(dict_t *dict, __u32 key)
+{
+	struct dquot	*dq;
+	dnode_t		*n;
+
+	n = dict_lookup(dict, UINT_TO_VOIDPTR(key));
+	if (n)
+		dq = dnode_get(n);
+	else {
+		if (ext2fs_get_mem(sizeof(struct dquot), &dq)) {
+			log_err("Unable to allocate dquot");
+			return NULL;
+		}
+		memset(dq, 0, sizeof(struct dquot));
+		dict_alloc_insert(dict, UINT_TO_VOIDPTR(key), dq);
+		dq->dq_id = key;
+	}
+	return dq;
+}
+
+
+/*
+ * Called to update the blocks used by a particular inode
+ */
+void quota_data_add(quota_ctx_t qctx, struct ext2_inode_large *inode,
+		    ext2_ino_t ino EXT2FS_ATTR((unused)),
+		    qsize_t space)
+{
+	struct dquot	*dq;
+	dict_t		*dict;
+	enum quota_type	qtype;
+
+	if (!qctx)
+		return;
+
+	log_debug("ADD_DATA: Inode: %u, UID/GID: %u/%u, space: %ld", ino,
+			inode_uid(*inode),
+			inode_gid(*inode), space);
+	for (qtype = 0; qtype < MAXQUOTAS; qtype++) {
+		if (qtype == PRJQUOTA && !project_quota_valid(qctx))
+			continue;
+		dict = qctx->quota_dict[qtype];
+		if (dict) {
+			dq = get_dq(dict, get_qid(inode, qtype));
+			if (dq)
+				dq->dq_dqb.dqb_curspace += space;
+		}
+	}
+}
+
+/*
+ * Called to remove some blocks used by a particular inode
+ */
+void quota_data_sub(quota_ctx_t qctx, struct ext2_inode_large *inode,
+		    ext2_ino_t ino EXT2FS_ATTR((unused)),
+		    qsize_t space)
+{
+	struct dquot	*dq;
+	dict_t		*dict;
+	enum quota_type	qtype;
+
+	if (!qctx)
+		return;
+
+	log_debug("SUB_DATA: Inode: %u, UID/GID: %u/%u, space: %ld", ino,
+			inode_uid(*inode),
+			inode_gid(*inode), space);
+	for (qtype = 0; qtype < MAXQUOTAS; qtype++) {
+		if (qtype == PRJQUOTA && !project_quota_valid(qctx))
+			continue;
+		dict = qctx->quota_dict[qtype];
+		if (dict) {
+			dq = get_dq(dict, get_qid(inode, qtype));
+			if (dq)
+				dq->dq_dqb.dqb_curspace -= space;
+		}
+	}
+}
+
+/*
+ * Called to count the files used by an inode's user/group
+ */
+void quota_data_inodes(quota_ctx_t qctx, struct ext2_inode_large *inode,
+		       ext2_ino_t ino EXT2FS_ATTR((unused)), int adjust)
+{
+	struct dquot	*dq;
+	dict_t		*dict;
+	enum quota_type	qtype;
+
+	if (!qctx)
+		return;
+
+	log_debug("ADJ_INODE: Inode: %u, UID/GID: %u/%u, adjust: %d", ino,
+			inode_uid(*inode),
+			inode_gid(*inode), adjust);
+	for (qtype = 0; qtype < MAXQUOTAS; qtype++) {
+		if (qtype == PRJQUOTA && !project_quota_valid(qctx))
+			continue;
+		dict = qctx->quota_dict[qtype];
+		if (dict) {
+			dq = get_dq(dict, get_qid(inode, qtype));
+			if (dq)
+				dq->dq_dqb.dqb_curinodes += adjust;
+		}
+	}
+}
+
+errcode_t quota_compute_usage(quota_ctx_t qctx)
+{
+	ext2_filsys fs;
+	ext2_ino_t ino;
+	errcode_t ret;
+	struct ext2_inode_large *inode;
+	int inode_size;
+	qsize_t space;
+	ext2_inode_scan scan;
+
+	if (!qctx)
+		return 0;
+
+	fs = qctx->fs;
+	ret = ext2fs_open_inode_scan(fs, 0, &scan);
+	if (ret) {
+		log_err("while opening inode scan. ret=%ld", ret);
+		return ret;
+	}
+	inode_size = fs->super->s_inode_size;
+	inode = malloc(inode_size);
+	if (!inode) {
+		ext2fs_close_inode_scan(scan);
+		return ENOMEM;
+	}
+	while (1) {
+		ret = ext2fs_get_next_inode_full(scan, &ino,
+						 EXT2_INODE(inode), inode_size);
+		if (ret) {
+			log_err("while getting next inode. ret=%ld", ret);
+			ext2fs_close_inode_scan(scan);
+			free(inode);
+			return ret;
+		}
+		if (ino == 0)
+			break;
+		if (!inode->i_links_count)
+			continue;
+		if (ino == EXT2_ROOT_INO ||
+		    (ino >= EXT2_FIRST_INODE(fs->super) &&
+		     ino != quota_type2inum(PRJQUOTA, fs->super) &&
+		     ino != fs->super->s_orphan_file_inum)) {
+			space = ext2fs_get_stat_i_blocks(fs,
+						EXT2_INODE(inode)) << 9;
+			quota_data_add(qctx, inode, ino, space);
+			quota_data_inodes(qctx, inode, ino, +1);
+		}
+	}
+
+	ext2fs_close_inode_scan(scan);
+	free(inode);
+	return 0;
+}
+
+struct scan_dquots_data {
+	dict_t		*quota_dict;
+	int             update_limits; /* update limits from disk */
+	int		update_usage;
+	int		check_consistency;
+	int		usage_is_inconsistent;
+};
+
+static int scan_dquots_callback(struct dquot *dquot, void *cb_data)
+{
+	struct scan_dquots_data *scan_data = cb_data;
+	dict_t *quota_dict = scan_data->quota_dict;
+	struct dquot *dq;
+
+	dq = get_dq(quota_dict, dquot->dq_id);
+	if (!dq)
+		return -1;
+	dq->dq_id = dquot->dq_id;
+	dq->dq_flags |= DQF_SEEN;
+
+	print_dquot("mem", dq);
+	print_dquot("dsk", dquot);
+
+	/* Check if there is inconsistency */
+	if (scan_data->check_consistency &&
+	    (dq->dq_dqb.dqb_curspace != dquot->dq_dqb.dqb_curspace ||
+	     dq->dq_dqb.dqb_curinodes != dquot->dq_dqb.dqb_curinodes)) {
+		scan_data->usage_is_inconsistent = 1;
+		fprintf(stderr, "[QUOTA WARNING] Usage inconsistent for ID %u:"
+			"actual (%lld, %lld) != expected (%lld, %lld)\n",
+			dq->dq_id, (long long) dq->dq_dqb.dqb_curspace,
+			(long long) dq->dq_dqb.dqb_curinodes,
+			(long long) dquot->dq_dqb.dqb_curspace,
+			(long long) dquot->dq_dqb.dqb_curinodes);
+	}
+
+	if (scan_data->update_limits) {
+		dq->dq_dqb.dqb_ihardlimit = dquot->dq_dqb.dqb_ihardlimit;
+		dq->dq_dqb.dqb_isoftlimit = dquot->dq_dqb.dqb_isoftlimit;
+		dq->dq_dqb.dqb_bhardlimit = dquot->dq_dqb.dqb_bhardlimit;
+		dq->dq_dqb.dqb_bsoftlimit = dquot->dq_dqb.dqb_bsoftlimit;
+	}
+
+	if (scan_data->update_usage) {
+		dq->dq_dqb.dqb_curspace = dquot->dq_dqb.dqb_curspace;
+		dq->dq_dqb.dqb_curinodes = dquot->dq_dqb.dqb_curinodes;
+	}
+
+	return 0;
+}
+
+/*
+ * Read quotas from disk and updates the in-memory information determined by
+ * 'flags' from the on-disk data.
+ */
+errcode_t quota_read_all_dquots(quota_ctx_t qctx, ext2_ino_t qf_ino,
+				enum quota_type qtype, unsigned int flags)
+{
+	struct scan_dquots_data scan_data;
+	struct quota_handle *qh;
+	errcode_t err;
+
+	if (!qctx)
+		return 0;
+
+	err = ext2fs_get_mem(sizeof(struct quota_handle), &qh);
+	if (err) {
+		log_debug("Unable to allocate quota handle");
+		return err;
+	}
+
+	err = quota_file_open(qctx, qh, qf_ino, qtype, -1, 0);
+	if (err) {
+		log_debug("Open quota file failed");
+		goto out;
+	}
+
+	scan_data.quota_dict = qctx->quota_dict[qh->qh_type];
+	scan_data.check_consistency = 0;
+	scan_data.update_limits = !!(flags & QREAD_LIMITS);
+	scan_data.update_usage = !!(flags & QREAD_USAGE);
+	qh->qh_ops->scan_dquots(qh, scan_dquots_callback, &scan_data);
+
+	err = quota_file_close(qctx, qh);
+	if (err) {
+		log_debug("Cannot finish IO on new quotafile: %s",
+			strerror(errno));
+		if (qh->qh_qf.e2_file)
+			ext2fs_file_close(qh->qh_qf.e2_file);
+	}
+out:
+	ext2fs_free_mem(&qh);
+	return err;
+}
+
+/*
+ * Compares the measured quota in qctx->quota_dict with that in the quota inode
+ * on disk and updates the limits in qctx->quota_dict. 'usage_inconsistent' is
+ * set to 1 if the supplied and on-disk quota usage values are not identical.
+ */
+errcode_t quota_compare_and_update(quota_ctx_t qctx, enum quota_type qtype,
+				   int *usage_inconsistent)
+{
+	struct quota_handle qh;
+	struct scan_dquots_data scan_data;
+	struct dquot *dq;
+	dnode_t *n;
+	dict_t *dict = qctx->quota_dict[qtype];
+	errcode_t err = 0;
+
+	if (!dict)
+		goto out;
+
+	err = quota_file_open(qctx, &qh, 0, qtype, -1, 0);
+	if (err) {
+		log_debug("Open quota file failed");
+		goto out;
+	}
+
+	scan_data.quota_dict = qctx->quota_dict[qtype];
+	scan_data.update_limits = 1;
+	scan_data.update_usage = 0;
+	scan_data.check_consistency = 1;
+	scan_data.usage_is_inconsistent = 0;
+	err = qh.qh_ops->scan_dquots(&qh, scan_dquots_callback, &scan_data);
+	if (err) {
+		log_debug("Error scanning dquots");
+		*usage_inconsistent = 1;
+		goto out_close_qh;
+	}
+
+	for (n = dict_first(dict); n; n = dict_next(dict, n)) {
+		dq = dnode_get(n);
+		if (!dq)
+			continue;
+		if ((dq->dq_flags & DQF_SEEN) == 0) {
+			fprintf(stderr, "[QUOTA WARNING] "
+				"Missing quota entry ID %d\n", dq->dq_id);
+			scan_data.usage_is_inconsistent = 1;
+		}
+	}
+	*usage_inconsistent = scan_data.usage_is_inconsistent;
+
+out_close_qh:
+	err = quota_file_close(qctx, &qh);
+	if (err) {
+		log_debug("Cannot close quotafile: %s", error_message(errno));
+		if (qh.qh_qf.e2_file)
+			ext2fs_file_close(qh.qh_qf.e2_file);
+	}
+out:
+	return err;
+}
+
+int parse_quota_opts(const char *opts, int (*func)(char *))
+{
+	char	*buf, *token, *next, *p;
+	int	len;
+	int	ret = 0;
+
+	len = strlen(opts);
+	buf = malloc(len + 1);
+	if (!buf) {
+		fprintf(stderr,
+			"Couldn't allocate memory to parse quota options!\n");
+		return -ENOMEM;
+	}
+	strcpy(buf, opts);
+	for (token = buf; token && *token; token = next) {
+		p = strchr(token, ',');
+		next = 0;
+		if (p) {
+			*p = 0;
+			next = p + 1;
+		}
+		ret = func(token);
+		if (ret)
+			break;
+	}
+	free(buf);
+	return ret;
+}