diff options
Diffstat (limited to 'lib/support/mkquota.c')
| -rw-r--r-- | lib/support/mkquota.c | 707 |
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; +} |