[thirdparty/e2fsprogs.git] / lib / support / mkquota.c

/*
 * 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, dq->dq_dqb.dqb_curspace,
		dq->dq_dqb.dqb_bsoftlimit, dq->dq_dqb.dqb_bhardlimit,
		dq->dq_dqb.dqb_curinodes,
		dq->dq_dqb.dqb_isoftlimit, 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, int 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, int qtype)
{
	ext2_ino_t *inump;

	inump = (qtype == USRQUOTA) ? &fs->super->s_usr_quota_inum :
		&fs->super->s_grp_quota_inum;

	log_debug("setting quota ino in superblock: ino=%u, type=%d", ino,
		 qtype);
	*inump = ino;
	ext2fs_mark_super_dirty(fs);
}

errcode_t quota_remove_inode(ext2_filsys fs, int qtype)
{
	ext2_ino_t qf_ino;
	errcode_t	retval;

	retval = ext2fs_read_bitmaps(fs);
	if (retval) {
		log_err("Couldn't read bitmaps: %s", error_message(retval));
		return retval;
	}
	qf_ino = (qtype == USRQUOTA) ? fs->super->s_usr_quota_inum :
		fs->super->s_grp_quota_inum;
	quota_set_sb_inum(fs, 0, qtype);
	/* Truncate the inode only if its a reserved one. */
	if (qf_ino < EXT2_FIRST_INODE(fs->super))
		quota_inode_truncate(fs, qf_ino);

	ext2fs_mark_super_dirty(fs);
	fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
	retval = ext2fs_write_bitmaps(fs);
	if (retval) {
		log_err("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, int qtype)
{
	int		retval = 0, i;
	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_err("Unable to allocate quota handle: %s",
			error_message(retval));
		goto out;
	}

	retval = ext2fs_read_bitmaps(fs);
	if (retval) {
		log_err("Couldn't read bitmaps: %s", error_message(retval));
		goto out;
	}

	for (i = 0; i < MAXQUOTAS; i++) {
		if ((qtype != -1) && (i != qtype))
			continue;

		dict = qctx->quota_dict[i];
		if (!dict)
			continue;

		retval = quota_file_create(h, fs, i, fmt);
		if (retval < 0) {
			log_err("Cannot initialize io on quotafile");
			continue;
		}

		write_dquots(dict, h);
		retval = quota_file_close(qctx, h);
		if (retval < 0) {
			log_err("Cannot finish IO on new quotafile: %s",
				strerror(errno));
			if (h->qh_qf.e2_file)
				ext2fs_file_close(h->qh_qf.e2_file);
			quota_inode_truncate(fs, h->qh_qf.ino);
			continue;
		}

		/* Set quota inode numbers in superblock. */
		quota_set_sb_inum(fs, h->qh_qf.ino, i);
		ext2fs_mark_super_dirty(fs);
		ext2fs_mark_bb_dirty(fs);
		fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
	}

	retval = ext2fs_write_bitmaps(fs);
	if (retval) {
		log_err("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 *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 qid_t get_qid(struct ext2_inode *inode, int qtype)
{
	if (qtype == USRQUOTA)
		return inode_uid(*inode);
	return inode_gid(*inode);
}

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, int qtype)
{
	errcode_t err;
	dict_t	*dict;
	quota_ctx_t ctx;
	int	i;

	err = ext2fs_get_mem(sizeof(struct quota_ctx), &ctx);
	if (err) {
		log_err("Failed to allocate quota context");
		return err;
	}

	memset(ctx, 0, sizeof(struct quota_ctx));
	for (i = 0; i < MAXQUOTAS; i++) {
		ctx->quota_file[i] = NULL;
		if ((qtype != -1) && (i != qtype))
			continue;
		err = ext2fs_get_mem(sizeof(dict_t), &dict);
		if (err) {
			log_err("Failed to allocate dictionary");
			quota_release_context(&ctx);
			return err;
		}
		ctx->quota_dict[i] = 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;
	int	i;
	quota_ctx_t ctx;

	if (!qctx)
		return;

	ctx = *qctx;
	for (i = 0; i < MAXQUOTAS; i++) {
		dict = ctx->quota_dict[i];
		ctx->quota_dict[i] = 0;
		if (dict) {
			dict_free_nodes(dict);
			free(dict);
		}
		if (ctx->quota_file[i]) {
			err = quota_file_close(ctx, ctx->quota_file[i]);
			if (err) {
				log_err("Cannot close quotafile: %s",
					strerror(errno));
				ext2fs_free_mem(&ctx->quota_file[i]);
			}
		}
	}
	*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 *inode,
		    ext2_ino_t ino EXT2FS_ATTR((unused)),
		    qsize_t space)
{
	struct dquot	*dq;
	dict_t		*dict;
	int		i;

	if (!qctx)
		return;

	log_debug("ADD_DATA: Inode: %u, UID/GID: %u/%u, space: %ld", ino,
			inode_uid(*inode),
			inode_gid(*inode), space);
	for (i = 0; i < MAXQUOTAS; i++) {
		dict = qctx->quota_dict[i];
		if (dict) {
			dq = get_dq(dict, get_qid(inode, i));
			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 *inode,
		    ext2_ino_t ino EXT2FS_ATTR((unused)),
		    qsize_t space)
{
	struct dquot	*dq;
	dict_t		*dict;
	int		i;

	if (!qctx)
		return;

	log_debug("SUB_DATA: Inode: %u, UID/GID: %u/%u, space: %ld", ino,
			inode_uid(*inode),
			inode_gid(*inode), space);
	for (i = 0; i < MAXQUOTAS; i++) {
		dict = qctx->quota_dict[i];
		if (dict) {
			dq = get_dq(dict, get_qid(inode, i));
			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 *inode,
		       ext2_ino_t ino EXT2FS_ATTR((unused)), int adjust)
{
	struct dquot	*dq;
	dict_t		*dict;
	int		i;

	if (!qctx)
		return;

	log_debug("ADJ_INODE: Inode: %u, UID/GID: %u/%u, adjust: %d", ino,
			inode_uid(*inode),
			inode_gid(*inode), adjust);
	for (i = 0; i < MAXQUOTAS; i++) {
		dict = qctx->quota_dict[i];
		if (dict) {
			dq = get_dq(dict, get_qid(inode, i));
			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 inode;
	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;
	}

	while (1) {
		ret = ext2fs_get_next_inode(scan, &ino, &inode);
		if (ret) {
			log_err("while getting next inode. ret=%ld", ret);
			ext2fs_close_inode_scan(scan);
			return ret;
		}
		if (ino == 0)
			break;
		if (inode.i_links_count &&
		    (ino == EXT2_ROOT_INO ||
		     ino >= EXT2_FIRST_INODE(fs->super))) {
			space = ext2fs_inode_i_blocks(fs, &inode) << 9;
			quota_data_add(qctx, &inode, ino, space);
			quota_data_inodes(qctx, &inode, ino, +1);
		}
	}

	ext2fs_close_inode_scan(scan);

	return 0;
}

struct scan_dquots_data {
	dict_t		*quota_dict;
	int             update_limits; /* update limits from disk */
	int		update_usage;
	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);
	dq->dq_id = dquot->dq_id;
	dq->dq_flags |= DQF_SEEN;

	print_dquot("mem", dq);
	print_dquot("dsk", dquot);

	/* Check if there is inconsistancy. */
	if (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 %d:"
			"actual (%llu, %llu) != expected (%llu, %llu)\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 all dquots from quota file into memory
 */
static errcode_t quota_read_all_dquots(struct quota_handle *qh,
                                       quota_ctx_t qctx, int update_limits)
{
	struct scan_dquots_data scan_data;

	scan_data.quota_dict = qctx->quota_dict[qh->qh_type];
	scan_data.update_limits = update_limits;
	scan_data.update_usage = 0;

	return qh->qh_ops->scan_dquots(qh, scan_dquots_callback, &scan_data);
}

/*
 * Write all memory dquots into quota file
 */
#if 0 /* currently unused, but may be useful in the future? */
static errcode_t quota_write_all_dquots(struct quota_handle *qh,
                                        quota_ctx_t qctx)
{
	errcode_t err;

	err = ext2fs_read_bitmaps(qctx->fs);
	if (err)
		return err;
	write_dquots(qctx->quota_dict[qh->qh_type], qh);
	ext2fs_mark_bb_dirty(qctx->fs);
	qctx->fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
	ext2fs_write_bitmaps(qctx->fs);
	return 0;
}
#endif

/*
 * Updates the in-memory quota limits from the given quota inode.
 */
errcode_t quota_update_limits(quota_ctx_t qctx, ext2_ino_t qf_ino, int type)
{
	struct quota_handle *qh;
	errcode_t err;

	if (!qctx)
		return 0;

	err = ext2fs_get_mem(sizeof(struct quota_handle), &qh);
	if (err) {
		log_err("Unable to allocate quota handle");
		return err;
	}

	err = quota_file_open(qctx, qh, qf_ino, type, -1, 0);
	if (err) {
		log_err("Open quota file failed");
		goto out;
	}

	quota_read_all_dquots(qh, qctx, 1);

	err = quota_file_close(qctx, qh);
	if (err) {
		log_err("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, int 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_err("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.usage_is_inconsistent = 0;
	err = qh.qh_ops->scan_dquots(&qh, scan_dquots_callback, &scan_data);
	if (err) {
		log_err("Error scanning dquots");
		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_err("Cannot close quotafile: %s", error_message(errno));
		if (qh.qh_qf.e2_file)
			ext2fs_file_close(qh.qh_qf.e2_file);
	}
out:
	return err;
}
Commit	Line	Data
f239fefc AK	1	/*
	2	* mkquota.c --- create quota files for a filesystem
	3	*
	4	* Aditya Kali <adityakali@google.com>
	5	*/
d1154eb4	6	#include "config.h"
f239fefc AK	7	#include <sys/types.h>
	8	#include <sys/stat.h>
	9	#include <unistd.h>
	10	#include <errno.h>
	11	#include <string.h>
	12	#include <fcntl.h>
	13
	14	#include "ext2fs/ext2_fs.h"
	15	#include "ext2fs/ext2fs.h"
	16	#include "e2p/e2p.h"
	17
f239fefc AK	18	#include "quotaio.h"
	19	#include "quotaio_v2.h"
	20	#include "quotaio_tree.h"
f239fefc	21	#include "common.h"
3dca12fb	22	#include "dict.h"
f239fefc AK	23
	24	/* Needed for architectures where sizeof(int) != sizeof(void ) /
	25	#define UINT_TO_VOIDPTR(val) ((void *)(intptr_t)(val))
	26	#define VOIDPTR_TO_UINT(ptr) ((unsigned int)(intptr_t)(ptr))
	27
00eb0eee	28	#if DEBUG_QUOTA
f239fefc AK	29	static void print_inode(struct ext2_inode *inode)
	30	{
	31	if (!inode)
	32	return;
	33
	34	fprintf(stderr, " i_mode = %d\n", inode->i_mode);
	35	fprintf(stderr, " i_uid = %d\n", inode->i_uid);
	36	fprintf(stderr, " i_size = %d\n", inode->i_size);
	37	fprintf(stderr, " i_atime = %d\n", inode->i_atime);
	38	fprintf(stderr, " i_ctime = %d\n", inode->i_ctime);
	39	fprintf(stderr, " i_mtime = %d\n", inode->i_mtime);
	40	fprintf(stderr, " i_dtime = %d\n", inode->i_dtime);
	41	fprintf(stderr, " i_gid = %d\n", inode->i_gid);
	42	fprintf(stderr, " i_links_count = %d\n", inode->i_links_count);
	43	fprintf(stderr, " i_blocks = %d\n", inode->i_blocks);
	44	fprintf(stderr, " i_flags = %d\n", inode->i_flags);
	45
	46	return;
	47	}
a0811c1a TT	48
	49	static void print_dquot(const char desc, struct dquot dq)
	50	{
	51	if (desc)
	52	fprintf(stderr, "%s: ", desc);
	53	fprintf(stderr, "%u %lld:%lld:%lld %lld:%lld:%lld\n",
	54	dq->dq_id, dq->dq_dqb.dqb_curspace,
	55	dq->dq_dqb.dqb_bsoftlimit, dq->dq_dqb.dqb_bhardlimit,
	56	dq->dq_dqb.dqb_curinodes,
	57	dq->dq_dqb.dqb_isoftlimit, dq->dq_dqb.dqb_ihardlimit);
	58	}
	59	#else
25f291c9 TT	60	static void print_dquot(const char *desc EXT2FS_ATTR((unused)),
25f291c9 TT	61	struct dquot *dq EXT2FS_ATTR((unused)))
a0811c1a TT	62	{
a0811c1a TT	63	}
00eb0eee	64	#endif
f239fefc	65
f239fefc AK	66	/*
	67	* Returns 0 if not able to find the quota file, otherwise returns its
	68	* inode number.
	69	*/
25f291c9	70	int quota_file_exists(ext2_filsys fs, int qtype)
f239fefc AK	71	{
	72	char qf_name[256];
	73	errcode_t ret;
	74	ext2_ino_t ino;
	75
36e4e21f	76	if (qtype >= MAXQUOTAS)
f239fefc AK	77	return -EINVAL;
f239fefc AK	78
2ae58b6d	79	quota_get_qf_name(qtype, QFMT_VFS_V1, qf_name);
f239fefc AK	80
	81	ret = ext2fs_lookup(fs, EXT2_ROOT_INO, qf_name, strlen(qf_name), 0,
	82	&ino);
	83	if (ret)
	84	return 0;
	85
	86	return ino;
	87	}
	88
	89	/*
	90	* Set the value for reserved quota inode number field in superblock.
	91	*/
a86d55da	92	void quota_set_sb_inum(ext2_filsys fs, ext2_ino_t ino, int qtype)
f239fefc AK	93	{
	94	ext2_ino_t *inump;
	95
	96	inump = (qtype == USRQUOTA) ? &fs->super->s_usr_quota_inum :
	97	&fs->super->s_grp_quota_inum;
	98
	99	log_debug("setting quota ino in superblock: ino=%u, type=%d", ino,
	100	qtype);
	101	*inump = ino;
	102	ext2fs_mark_super_dirty(fs);
	103	}
	104
a86d55da	105	errcode_t quota_remove_inode(ext2_filsys fs, int qtype)
f239fefc AK	106	{
f239fefc AK	107	ext2_ino_t qf_ino;
fa8b1c02	108	errcode_t retval;
f239fefc	109
fa8b1c02 TT	110	retval = ext2fs_read_bitmaps(fs);
	111	if (retval) {
	112	log_err("Couldn't read bitmaps: %s", error_message(retval));
	113	return retval;
	114	}
f239fefc AK	115	qf_ino = (qtype == USRQUOTA) ? fs->super->s_usr_quota_inum :
f239fefc AK	116	fs->super->s_grp_quota_inum;
a86d55da	117	quota_set_sb_inum(fs, 0, qtype);
f239fefc AK	118	/* Truncate the inode only if its a reserved one. */
f239fefc AK	119	if (qf_ino < EXT2_FIRST_INODE(fs->super))
a86d55da	120	quota_inode_truncate(fs, qf_ino);
f239fefc AK	121
f239fefc AK	122	ext2fs_mark_super_dirty(fs);
43075b42	123	fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
fa8b1c02 TT	124	retval = ext2fs_write_bitmaps(fs);
	125	if (retval) {
	126	log_err("Couldn't write bitmaps: %s", error_message(retval));
	127	return retval;
	128	}
f239fefc AK	129	return 0;
	130	}
	131
	132	static void write_dquots(dict_t dict, struct quota_handle qh)
	133	{
f239fefc AK	134	dnode_t *n;
f239fefc AK	135	struct dquot *dq;
f239fefc AK	136
	137	for (n = dict_first(dict); n; n = dict_next(dict, n)) {
	138	dq = dnode_get(n);
	139	if (dq) {
a0811c1a	140	print_dquot("write", dq);
f239fefc AK	141	dq->dq_h = qh;
f239fefc AK	142	update_grace_times(dq);
b5ba6f5b	143	qh->qh_ops->commit_dquot(dq);
f239fefc AK	144	}
	145	}
	146	}
	147
a86d55da	148	errcode_t quota_write_inode(quota_ctx_t qctx, int qtype)
f239fefc	149	{
edbfd75d	150	int retval = 0, i;
f239fefc AK	151	dict_t *dict;
f239fefc AK	152	ext2_filsys fs;
00eb0eee	153	struct quota_handle *h = NULL;
f239fefc AK	154	int fmt = QFMT_VFS_V1;
	155
	156	if (!qctx)
edbfd75d	157	return 0;
f239fefc AK	158
f239fefc AK	159	fs = qctx->fs;
a86d55da AK	160	retval = ext2fs_get_mem(sizeof(struct quota_handle), &h);
a86d55da AK	161	if (retval) {
3f10707d TT	162	log_err("Unable to allocate quota handle: %s",
3f10707d TT	163	error_message(retval));
a86d55da AK	164	goto out;
	165	}
	166
3f10707d TT	167	retval = ext2fs_read_bitmaps(fs);
	168	if (retval) {
	169	log_err("Couldn't read bitmaps: %s", error_message(retval));
	170	goto out;
	171	}
f239fefc AK	172
	173	for (i = 0; i < MAXQUOTAS; i++) {
	174	if ((qtype != -1) && (i != qtype))
	175	continue;
	176
	177	dict = qctx->quota_dict[i];
	178	if (!dict)
	179	continue;
	180
a86d55da	181	retval = quota_file_create(h, fs, i, fmt);
f239fefc	182	if (retval < 0) {
0ce01729	183	log_err("Cannot initialize io on quotafile");
f239fefc AK	184	continue;
	185	}
	186
	187	write_dquots(dict, h);
cbc1280d	188	retval = quota_file_close(qctx, h);
f239fefc AK	189	if (retval < 0) {
	190	log_err("Cannot finish IO on new quotafile: %s",
	191	strerror(errno));
	192	if (h->qh_qf.e2_file)
	193	ext2fs_file_close(h->qh_qf.e2_file);
a86d55da	194	quota_inode_truncate(fs, h->qh_qf.ino);
f239fefc AK	195	continue;
	196	}
	197
	198	/* Set quota inode numbers in superblock. */
a86d55da	199	quota_set_sb_inum(fs, h->qh_qf.ino, i);
f239fefc AK	200	ext2fs_mark_super_dirty(fs);
	201	ext2fs_mark_bb_dirty(fs);
	202	fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
	203	}
	204
3f10707d TT	205	retval = ext2fs_write_bitmaps(fs);
	206	if (retval) {
	207	log_err("Couldn't write bitmaps: %s", error_message(retval));
	208	goto out;
	209	}
a86d55da AK	210	out:
	211	if (h)
	212	ext2fs_free_mem(&h);
f239fefc AK	213	return retval;
	214	}
	215
	216	/******************************************************************/
	217	/* Helper functions for computing quota in memory. */
	218	/******************************************************************/
	219
	220	static int dict_uint_cmp(const void a, const void b)
	221	{
	222	unsigned int c, d;
	223
	224	c = VOIDPTR_TO_UINT(a);
	225	d = VOIDPTR_TO_UINT(b);
	226
4cf0b0fe NY	227	if (c == d)
	228	return 0;
	229	else if (c > d)
	230	return 1;
	231	else
	232	return -1;
f239fefc AK	233	}
f239fefc AK	234
a86d55da	235	static inline qid_t get_qid(struct ext2_inode *inode, int qtype)
f239fefc	236	{
a86d55da	237	if (qtype == USRQUOTA)
f239fefc	238	return inode_uid(*inode);
a86d55da	239	return inode_gid(*inode);
f239fefc AK	240	}
	241
	242	static void quota_dnode_free(dnode_t *node,
	243	void *context EXT2FS_ATTR((unused)))
	244	{
	245	void *ptr = node ? dnode_get(node) : 0;
	246
a86d55da	247	ext2fs_free_mem(&ptr);
f239fefc AK	248	free(node);
	249	}
	250
	251	/*
a86d55da	252	* Set up the quota tracking data structures.
f239fefc	253	*/
a86d55da	254	errcode_t quota_init_context(quota_ctx_t *qctx, ext2_filsys fs, int qtype)
f239fefc	255	{
cbc1280d	256	errcode_t err;
f239fefc AK	257	dict_t *dict;
f239fefc AK	258	quota_ctx_t ctx;
cbc1280d	259	int i;
f239fefc	260
a86d55da AK	261	err = ext2fs_get_mem(sizeof(struct quota_ctx), &ctx);
a86d55da AK	262	if (err) {
0ce01729	263	log_err("Failed to allocate quota context");
a86d55da AK	264	return err;
	265	}
	266
f239fefc AK	267	memset(ctx, 0, sizeof(struct quota_ctx));
f239fefc AK	268	for (i = 0; i < MAXQUOTAS; i++) {
cbc1280d	269	ctx->quota_file[i] = NULL;
f239fefc AK	270	if ((qtype != -1) && (i != qtype))
f239fefc AK	271	continue;
a86d55da AK	272	err = ext2fs_get_mem(sizeof(dict_t), &dict);
a86d55da AK	273	if (err) {
0ce01729	274	log_err("Failed to allocate dictionary");
b2778bcb	275	quota_release_context(&ctx);
a86d55da AK	276	return err;
a86d55da AK	277	}
f239fefc AK	278	ctx->quota_dict[i] = dict;
	279	dict_init(dict, DICTCOUNT_T_MAX, dict_uint_cmp);
	280	dict_set_allocator(dict, NULL, quota_dnode_free, NULL);
	281	}
	282
	283	ctx->fs = fs;
	284	*qctx = ctx;
a86d55da	285	return 0;
f239fefc AK	286	}
f239fefc AK	287
a86d55da	288	void quota_release_context(quota_ctx_t *qctx)
f239fefc	289	{
cbc1280d	290	errcode_t err;
f239fefc AK	291	dict_t *dict;
	292	int i;
	293	quota_ctx_t ctx;
	294
	295	if (!qctx)
	296	return;
	297
	298	ctx = *qctx;
	299	for (i = 0; i < MAXQUOTAS; i++) {
	300	dict = ctx->quota_dict[i];
	301	ctx->quota_dict[i] = 0;
	302	if (dict) {
	303	dict_free_nodes(dict);
	304	free(dict);
	305	}
cbc1280d TT	306	if (ctx->quota_file[i]) {
	307	err = quota_file_close(ctx, ctx->quota_file[i]);
	308	if (err) {
	309	log_err("Cannot close quotafile: %s",
	310	strerror(errno));
	311	ext2fs_free_mem(&ctx->quota_file[i]);
	312	}
	313	}
f239fefc AK	314	}
	315	*qctx = NULL;
	316	free(ctx);
	317	}
	318
	319	static struct dquot get_dq(dict_t dict, __u32 key)
	320	{
	321	struct dquot *dq;
	322	dnode_t *n;
	323
	324	n = dict_lookup(dict, UINT_TO_VOIDPTR(key));
	325	if (n)
	326	dq = dnode_get(n);
	327	else {
a86d55da	328	if (ext2fs_get_mem(sizeof(struct dquot), &dq)) {
0ce01729	329	log_err("Unable to allocate dquot");
a86d55da AK	330	return NULL;
a86d55da AK	331	}
f239fefc AK	332	memset(dq, 0, sizeof(struct dquot));
f239fefc AK	333	dict_alloc_insert(dict, UINT_TO_VOIDPTR(key), dq);
1527d99d	334	dq->dq_id = key;
f239fefc AK	335	}
	336	return dq;
	337	}
	338
	339
	340	/*
	341	* Called to update the blocks used by a particular inode
	342	*/
25f291c9 TT	343	void quota_data_add(quota_ctx_t qctx, struct ext2_inode *inode,
25f291c9 TT	344	ext2_ino_t ino EXT2FS_ATTR((unused)),
f239fefc AK	345	qsize_t space)
	346	{
	347	struct dquot *dq;
	348	dict_t *dict;
	349	int i;
	350
	351	if (!qctx)
	352	return;
	353
	354	log_debug("ADD_DATA: Inode: %u, UID/GID: %u/%u, space: %ld", ino,
	355	inode_uid(*inode),
	356	inode_gid(*inode), space);
	357	for (i = 0; i < MAXQUOTAS; i++) {
	358	dict = qctx->quota_dict[i];
	359	if (dict) {
	360	dq = get_dq(dict, get_qid(inode, i));
a86d55da AK	361	if (dq)
a86d55da AK	362	dq->dq_dqb.dqb_curspace += space;
f239fefc AK	363	}
	364	}
	365	}
	366
	367	/*
	368	* Called to remove some blocks used by a particular inode
	369	*/
25f291c9 TT	370	void quota_data_sub(quota_ctx_t qctx, struct ext2_inode *inode,
25f291c9 TT	371	ext2_ino_t ino EXT2FS_ATTR((unused)),
f239fefc AK	372	qsize_t space)
	373	{
	374	struct dquot *dq;
	375	dict_t *dict;
	376	int i;
	377
	378	if (!qctx)
	379	return;
	380
	381	log_debug("SUB_DATA: Inode: %u, UID/GID: %u/%u, space: %ld", ino,
	382	inode_uid(*inode),
	383	inode_gid(*inode), space);
	384	for (i = 0; i < MAXQUOTAS; i++) {
	385	dict = qctx->quota_dict[i];
	386	if (dict) {
	387	dq = get_dq(dict, get_qid(inode, i));
	388	dq->dq_dqb.dqb_curspace -= space;
	389	}
	390	}
	391	}
	392
	393	/*
	394	* Called to count the files used by an inode's user/group
	395	*/
	396	void quota_data_inodes(quota_ctx_t qctx, struct ext2_inode *inode,
25f291c9	397	ext2_ino_t ino EXT2FS_ATTR((unused)), int adjust)
f239fefc AK	398	{
	399	struct dquot *dq;
	400	dict_t *dict;
	401	int i;
	402
	403	if (!qctx)
	404	return;
	405
	406	log_debug("ADJ_INODE: Inode: %u, UID/GID: %u/%u, adjust: %d", ino,
	407	inode_uid(*inode),
	408	inode_gid(*inode), adjust);
	409	for (i = 0; i < MAXQUOTAS; i++) {
	410	dict = qctx->quota_dict[i];
	411	if (dict) {
	412	dq = get_dq(dict, get_qid(inode, i));
	413	dq->dq_dqb.dqb_curinodes += adjust;
	414	}
	415	}
	416	}
	417
a86d55da	418	errcode_t quota_compute_usage(quota_ctx_t qctx)
f239fefc AK	419	{
f239fefc AK	420	ext2_filsys fs;
f239fefc AK	421	ext2_ino_t ino;
	422	errcode_t ret;
	423	struct ext2_inode inode;
	424	qsize_t space;
	425	ext2_inode_scan scan;
	426
	427	if (!qctx)
edbfd75d	428	return 0;
f239fefc AK	429
	430	fs = qctx->fs;
	431	ret = ext2fs_open_inode_scan(fs, 0, &scan);
	432	if (ret) {
	433	log_err("while opening inode scan. ret=%ld", ret);
	434	return ret;
	435	}
	436
	437	while (1) {
	438	ret = ext2fs_get_next_inode(scan, &ino, &inode);
	439	if (ret) {
	440	log_err("while getting next inode. ret=%ld", ret);
	441	ext2fs_close_inode_scan(scan);
	442	return ret;
	443	}
	444	if (ino == 0)
	445	break;
50277515 AK	446	if (inode.i_links_count &&
	447	(ino == EXT2_ROOT_INO \|\|
	448	ino >= EXT2_FIRST_INODE(fs->super))) {
7bed9a78	449	space = ext2fs_inode_i_blocks(fs, &inode) << 9;
f239fefc AK	450	quota_data_add(qctx, &inode, ino, space);
	451	quota_data_inodes(qctx, &inode, ino, +1);
	452	}
	453	}
	454
	455	ext2fs_close_inode_scan(scan);
	456
	457	return 0;
	458	}
198d20fc N	459
198d20fc N	460	struct scan_dquots_data {
7943ccf5 AK	461	dict_t *quota_dict;
	462	int update_limits; /* update limits from disk */
	463	int update_usage;
	464	int usage_is_inconsistent;
198d20fc N	465	};
	466
	467	static int scan_dquots_callback(struct dquot dquot, void cb_data)
	468	{
7943ccf5 AK	469	struct scan_dquots_data *scan_data = cb_data;
7943ccf5 AK	470	dict_t *quota_dict = scan_data->quota_dict;
198d20fc N	471	struct dquot *dq;
198d20fc N	472
7943ccf5	473	dq = get_dq(quota_dict, dquot->dq_id);
198d20fc	474	dq->dq_id = dquot->dq_id;
68ba77ca	475	dq->dq_flags \|= DQF_SEEN;
7943ccf5	476
a0811c1a TT	477	print_dquot("mem", dq);
	478	print_dquot("dsk", dquot);
	479
7943ccf5 AK	480	/* Check if there is inconsistancy. */
	481	if (dq->dq_dqb.dqb_curspace != dquot->dq_dqb.dqb_curspace \|\|
	482	dq->dq_dqb.dqb_curinodes != dquot->dq_dqb.dqb_curinodes) {
	483	scan_data->usage_is_inconsistent = 1;
50277515 AK	484	fprintf(stderr, "[QUOTA WARNING] Usage inconsistent for ID %d:"
50277515 AK	485	"actual (%llu, %llu) != expected (%llu, %llu)\n",
0ce01729 AD	486	dq->dq_id, (long long)dq->dq_dqb.dqb_curspace,
	487	(long long)dq->dq_dqb.dqb_curinodes,
	488	(long long)dquot->dq_dqb.dqb_curspace,
	489	(long long)dquot->dq_dqb.dqb_curinodes);
7943ccf5 AK	490	}
	491
	492	if (scan_data->update_limits) {
198d20fc N	493	dq->dq_dqb.dqb_ihardlimit = dquot->dq_dqb.dqb_ihardlimit;
	494	dq->dq_dqb.dqb_isoftlimit = dquot->dq_dqb.dqb_isoftlimit;
	495	dq->dq_dqb.dqb_bhardlimit = dquot->dq_dqb.dqb_bhardlimit;
	496	dq->dq_dqb.dqb_bsoftlimit = dquot->dq_dqb.dqb_bsoftlimit;
198d20fc	497	}
7943ccf5 AK	498
	499	if (scan_data->update_usage) {
	500	dq->dq_dqb.dqb_curspace = dquot->dq_dqb.dqb_curspace;
	501	dq->dq_dqb.dqb_curinodes = dquot->dq_dqb.dqb_curinodes;
	502	}
	503
198d20fc N	504	return 0;
	505	}
	506
	507	/*
	508	* Read all dquots from quota file into memory
	509	*/
	510	static errcode_t quota_read_all_dquots(struct quota_handle *qh,
7943ccf5	511	quota_ctx_t qctx, int update_limits)
198d20fc N	512	{
	513	struct scan_dquots_data scan_data;
	514
7943ccf5 AK	515	scan_data.quota_dict = qctx->quota_dict[qh->qh_type];
	516	scan_data.update_limits = update_limits;
	517	scan_data.update_usage = 0;
198d20fc N	518
	519	return qh->qh_ops->scan_dquots(qh, scan_dquots_callback, &scan_data);
	520	}
	521
	522	/*
	523	* Write all memory dquots into quota file
	524	*/
0ce01729	525	#if 0 /* currently unused, but may be useful in the future? */
198d20fc N	526	static errcode_t quota_write_all_dquots(struct quota_handle *qh,
	527	quota_ctx_t qctx)
	528	{
	529	errcode_t err;
	530
	531	err = ext2fs_read_bitmaps(qctx->fs);
	532	if (err)
	533	return err;
	534	write_dquots(qctx->quota_dict[qh->qh_type], qh);
	535	ext2fs_mark_bb_dirty(qctx->fs);
	536	qctx->fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
	537	ext2fs_write_bitmaps(qctx->fs);
	538	return 0;
	539	}
0ce01729	540	#endif
198d20fc N	541
198d20fc N	542	/*
50277515	543	* Updates the in-memory quota limits from the given quota inode.
198d20fc	544	*/
50277515	545	errcode_t quota_update_limits(quota_ctx_t qctx, ext2_ino_t qf_ino, int type)
198d20fc N	546	{
	547	struct quota_handle *qh;
	548	errcode_t err;
	549
	550	if (!qctx)
	551	return 0;
	552
	553	err = ext2fs_get_mem(sizeof(struct quota_handle), &qh);
	554	if (err) {
0ce01729	555	log_err("Unable to allocate quota handle");
198d20fc N	556	return err;
	557	}
	558
cbc1280d	559	err = quota_file_open(qctx, qh, qf_ino, type, -1, 0);
198d20fc	560	if (err) {
0ce01729	561	log_err("Open quota file failed");
198d20fc N	562	goto out;
	563	}
	564
	565	quota_read_all_dquots(qh, qctx, 1);
198d20fc	566
cbc1280d	567	err = quota_file_close(qctx, qh);
198d20fc N	568	if (err) {
	569	log_err("Cannot finish IO on new quotafile: %s",
	570	strerror(errno));
	571	if (qh->qh_qf.e2_file)
	572	ext2fs_file_close(qh->qh_qf.e2_file);
	573	}
	574	out:
	575	ext2fs_free_mem(&qh);
	576	return err;
	577	}
7943ccf5 AK	578
	579	/*
	580	* Compares the measured quota in qctx->quota_dict with that in the quota inode
	581	* on disk and updates the limits in qctx->quota_dict. 'usage_inconsistent' is
	582	* set to 1 if the supplied and on-disk quota usage values are not identical.
	583	*/
	584	errcode_t quota_compare_and_update(quota_ctx_t qctx, int qtype,
	585	int *usage_inconsistent)
	586	{
7943ccf5 AK	587	struct quota_handle qh;
7943ccf5 AK	588	struct scan_dquots_data scan_data;
68ba77ca TT	589	struct dquot *dq;
	590	dnode_t *n;
	591	dict_t *dict = qctx->quota_dict[qtype];
7943ccf5 AK	592	errcode_t err = 0;
7943ccf5 AK	593
68ba77ca	594	if (!dict)
7943ccf5 AK	595	goto out;
7943ccf5 AK	596
cbc1280d	597	err = quota_file_open(qctx, &qh, 0, qtype, -1, 0);
7943ccf5	598	if (err) {
0ce01729	599	log_err("Open quota file failed");
7943ccf5 AK	600	goto out;
	601	}
	602
	603	scan_data.quota_dict = qctx->quota_dict[qtype];
	604	scan_data.update_limits = 1;
	605	scan_data.update_usage = 0;
	606	scan_data.usage_is_inconsistent = 0;
	607	err = qh.qh_ops->scan_dquots(&qh, scan_dquots_callback, &scan_data);
	608	if (err) {
0ce01729	609	log_err("Error scanning dquots");
4af2b156	610	goto out_close_qh;
7943ccf5	611	}
68ba77ca TT	612
	613	for (n = dict_first(dict); n; n = dict_next(dict, n)) {
	614	dq = dnode_get(n);
	615	if (!dq)
	616	continue;
	617	if ((dq->dq_flags & DQF_SEEN) == 0) {
	618	fprintf(stderr, "[QUOTA WARNING] "
	619	"Missing quota entry ID %d\n", dq->dq_id);
	620	scan_data.usage_is_inconsistent = 1;
	621	}
	622	}
7943ccf5 AK	623	*usage_inconsistent = scan_data.usage_is_inconsistent;
7943ccf5 AK	624
4af2b156	625	out_close_qh:
cbc1280d	626	err = quota_file_close(qctx, &qh);
4af2b156 TT	627	if (err) {
	628	log_err("Cannot close quotafile: %s", error_message(errno));
	629	if (qh.qh_qf.e2_file)
	630	ext2fs_file_close(qh.qh_qf.e2_file);
	631	}
7943ccf5 AK	632	out:
	633	return err;
	634	}