| /* |
| * Implementation of operations over global quota file |
| */ |
| #include <linux/spinlock.h> |
| #include <linux/fs.h> |
| #include <linux/slab.h> |
| #include <linux/quota.h> |
| #include <linux/quotaops.h> |
| #include <linux/dqblk_qtree.h> |
| #include <linux/jiffies.h> |
| #include <linux/writeback.h> |
| #include <linux/workqueue.h> |
| #include <linux/llist.h> |
| |
| #include <cluster/masklog.h> |
| |
| #include "ocfs2_fs.h" |
| #include "ocfs2.h" |
| #include "alloc.h" |
| #include "blockcheck.h" |
| #include "inode.h" |
| #include "journal.h" |
| #include "file.h" |
| #include "sysfile.h" |
| #include "dlmglue.h" |
| #include "uptodate.h" |
| #include "super.h" |
| #include "buffer_head_io.h" |
| #include "quota.h" |
| #include "ocfs2_trace.h" |
| |
| /* |
| * Locking of quotas with OCFS2 is rather complex. Here are rules that |
| * should be obeyed by all the functions: |
| * - any write of quota structure (either to local or global file) is protected |
| * by dqio_mutex or dquot->dq_lock. |
| * - any modification of global quota file holds inode cluster lock, i_mutex, |
| * and ip_alloc_sem of the global quota file (achieved by |
| * ocfs2_lock_global_qf). It also has to hold qinfo_lock. |
| * - an allocation of new blocks for local quota file is protected by |
| * its ip_alloc_sem |
| * |
| * A rough sketch of locking dependencies (lf = local file, gf = global file): |
| * Normal filesystem operation: |
| * start_trans -> dqio_mutex -> write to lf |
| * Syncing of local and global file: |
| * ocfs2_lock_global_qf -> start_trans -> dqio_mutex -> qinfo_lock -> |
| * write to gf |
| * -> write to lf |
| * Acquire dquot for the first time: |
| * dq_lock -> ocfs2_lock_global_qf -> qinfo_lock -> read from gf |
| * -> alloc space for gf |
| * -> start_trans -> qinfo_lock -> write to gf |
| * -> ip_alloc_sem of lf -> alloc space for lf |
| * -> write to lf |
| * Release last reference to dquot: |
| * dq_lock -> ocfs2_lock_global_qf -> start_trans -> qinfo_lock -> write to gf |
| * -> write to lf |
| * Note that all the above operations also hold the inode cluster lock of lf. |
| * Recovery: |
| * inode cluster lock of recovered lf |
| * -> read bitmaps -> ip_alloc_sem of lf |
| * -> ocfs2_lock_global_qf -> start_trans -> dqio_mutex -> qinfo_lock -> |
| * write to gf |
| */ |
| |
| static void qsync_work_fn(struct work_struct *work); |
| |
| static void ocfs2_global_disk2memdqb(struct dquot *dquot, void *dp) |
| { |
| struct ocfs2_global_disk_dqblk *d = dp; |
| struct mem_dqblk *m = &dquot->dq_dqb; |
| |
| /* Update from disk only entries not set by the admin */ |
| if (!test_bit(DQ_LASTSET_B + QIF_ILIMITS_B, &dquot->dq_flags)) { |
| m->dqb_ihardlimit = le64_to_cpu(d->dqb_ihardlimit); |
| m->dqb_isoftlimit = le64_to_cpu(d->dqb_isoftlimit); |
| } |
| if (!test_bit(DQ_LASTSET_B + QIF_INODES_B, &dquot->dq_flags)) |
| m->dqb_curinodes = le64_to_cpu(d->dqb_curinodes); |
| if (!test_bit(DQ_LASTSET_B + QIF_BLIMITS_B, &dquot->dq_flags)) { |
| m->dqb_bhardlimit = le64_to_cpu(d->dqb_bhardlimit); |
| m->dqb_bsoftlimit = le64_to_cpu(d->dqb_bsoftlimit); |
| } |
| if (!test_bit(DQ_LASTSET_B + QIF_SPACE_B, &dquot->dq_flags)) |
| m->dqb_curspace = le64_to_cpu(d->dqb_curspace); |
| if (!test_bit(DQ_LASTSET_B + QIF_BTIME_B, &dquot->dq_flags)) |
| m->dqb_btime = le64_to_cpu(d->dqb_btime); |
| if (!test_bit(DQ_LASTSET_B + QIF_ITIME_B, &dquot->dq_flags)) |
| m->dqb_itime = le64_to_cpu(d->dqb_itime); |
| OCFS2_DQUOT(dquot)->dq_use_count = le32_to_cpu(d->dqb_use_count); |
| } |
| |
| static void ocfs2_global_mem2diskdqb(void *dp, struct dquot *dquot) |
| { |
| struct ocfs2_global_disk_dqblk *d = dp; |
| struct mem_dqblk *m = &dquot->dq_dqb; |
| |
| d->dqb_id = cpu_to_le32(from_kqid(&init_user_ns, dquot->dq_id)); |
| d->dqb_use_count = cpu_to_le32(OCFS2_DQUOT(dquot)->dq_use_count); |
| d->dqb_ihardlimit = cpu_to_le64(m->dqb_ihardlimit); |
| d->dqb_isoftlimit = cpu_to_le64(m->dqb_isoftlimit); |
| d->dqb_curinodes = cpu_to_le64(m->dqb_curinodes); |
| d->dqb_bhardlimit = cpu_to_le64(m->dqb_bhardlimit); |
| d->dqb_bsoftlimit = cpu_to_le64(m->dqb_bsoftlimit); |
| d->dqb_curspace = cpu_to_le64(m->dqb_curspace); |
| d->dqb_btime = cpu_to_le64(m->dqb_btime); |
| d->dqb_itime = cpu_to_le64(m->dqb_itime); |
| d->dqb_pad1 = d->dqb_pad2 = 0; |
| } |
| |
| static int ocfs2_global_is_id(void *dp, struct dquot *dquot) |
| { |
| struct ocfs2_global_disk_dqblk *d = dp; |
| struct ocfs2_mem_dqinfo *oinfo = |
| sb_dqinfo(dquot->dq_sb, dquot->dq_id.type)->dqi_priv; |
| |
| if (qtree_entry_unused(&oinfo->dqi_gi, dp)) |
| return 0; |
| |
| return qid_eq(make_kqid(&init_user_ns, dquot->dq_id.type, |
| le32_to_cpu(d->dqb_id)), |
| dquot->dq_id); |
| } |
| |
| const struct qtree_fmt_operations ocfs2_global_ops = { |
| .mem2disk_dqblk = ocfs2_global_mem2diskdqb, |
| .disk2mem_dqblk = ocfs2_global_disk2memdqb, |
| .is_id = ocfs2_global_is_id, |
| }; |
| |
| int ocfs2_validate_quota_block(struct super_block *sb, struct buffer_head *bh) |
| { |
| struct ocfs2_disk_dqtrailer *dqt = |
| ocfs2_block_dqtrailer(sb->s_blocksize, bh->b_data); |
| |
| trace_ocfs2_validate_quota_block((unsigned long long)bh->b_blocknr); |
| |
| BUG_ON(!buffer_uptodate(bh)); |
| |
| /* |
| * If the ecc fails, we return the error but otherwise |
| * leave the filesystem running. We know any error is |
| * local to this block. |
| */ |
| return ocfs2_validate_meta_ecc(sb, bh->b_data, &dqt->dq_check); |
| } |
| |
| int ocfs2_read_quota_phys_block(struct inode *inode, u64 p_block, |
| struct buffer_head **bhp) |
| { |
| int rc; |
| |
| *bhp = NULL; |
| rc = ocfs2_read_blocks(INODE_CACHE(inode), p_block, 1, bhp, 0, |
| ocfs2_validate_quota_block); |
| if (rc) |
| mlog_errno(rc); |
| return rc; |
| } |
| |
| /* Read data from global quotafile - avoid pagecache and such because we cannot |
| * afford acquiring the locks... We use quota cluster lock to serialize |
| * operations. Caller is responsible for acquiring it. */ |
| ssize_t ocfs2_quota_read(struct super_block *sb, int type, char *data, |
| size_t len, loff_t off) |
| { |
| struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv; |
| struct inode *gqinode = oinfo->dqi_gqinode; |
| loff_t i_size = i_size_read(gqinode); |
| int offset = off & (sb->s_blocksize - 1); |
| sector_t blk = off >> sb->s_blocksize_bits; |
| int err = 0; |
| struct buffer_head *bh; |
| size_t toread, tocopy; |
| u64 pblock = 0, pcount = 0; |
| |
| if (off > i_size) |
| return 0; |
| if (off + len > i_size) |
| len = i_size - off; |
| toread = len; |
| while (toread > 0) { |
| tocopy = min_t(size_t, (sb->s_blocksize - offset), toread); |
| if (!pcount) { |
| err = ocfs2_extent_map_get_blocks(gqinode, blk, &pblock, |
| &pcount, NULL); |
| if (err) { |
| mlog_errno(err); |
| return err; |
| } |
| } else { |
| pcount--; |
| pblock++; |
| } |
| bh = NULL; |
| err = ocfs2_read_quota_phys_block(gqinode, pblock, &bh); |
| if (err) { |
| mlog_errno(err); |
| return err; |
| } |
| memcpy(data, bh->b_data + offset, tocopy); |
| brelse(bh); |
| offset = 0; |
| toread -= tocopy; |
| data += tocopy; |
| blk++; |
| } |
| return len; |
| } |
| |
| /* Write to quotafile (we know the transaction is already started and has |
| * enough credits) */ |
| ssize_t ocfs2_quota_write(struct super_block *sb, int type, |
| const char *data, size_t len, loff_t off) |
| { |
| struct mem_dqinfo *info = sb_dqinfo(sb, type); |
| struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv; |
| struct inode *gqinode = oinfo->dqi_gqinode; |
| int offset = off & (sb->s_blocksize - 1); |
| sector_t blk = off >> sb->s_blocksize_bits; |
| int err = 0, new = 0, ja_type; |
| struct buffer_head *bh = NULL; |
| handle_t *handle = journal_current_handle(); |
| u64 pblock, pcount; |
| |
| if (!handle) { |
| mlog(ML_ERROR, "Quota write (off=%llu, len=%llu) cancelled " |
| "because transaction was not started.\n", |
| (unsigned long long)off, (unsigned long long)len); |
| return -EIO; |
| } |
| if (len > sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE - offset) { |
| WARN_ON(1); |
| len = sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE - offset; |
| } |
| |
| if (i_size_read(gqinode) < off + len) { |
| loff_t rounded_end = |
| ocfs2_align_bytes_to_blocks(sb, off + len); |
| |
| /* Space is already allocated in ocfs2_acquire_dquot() */ |
| err = ocfs2_simple_size_update(gqinode, |
| oinfo->dqi_gqi_bh, |
| rounded_end); |
| if (err < 0) |
| goto out; |
| new = 1; |
| } |
| err = ocfs2_extent_map_get_blocks(gqinode, blk, &pblock, &pcount, NULL); |
| if (err) { |
| mlog_errno(err); |
| goto out; |
| } |
| /* Not rewriting whole block? */ |
| if ((offset || len < sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE) && |
| !new) { |
| err = ocfs2_read_quota_phys_block(gqinode, pblock, &bh); |
| ja_type = OCFS2_JOURNAL_ACCESS_WRITE; |
| } else { |
| bh = sb_getblk(sb, pblock); |
| if (!bh) |
| err = -ENOMEM; |
| ja_type = OCFS2_JOURNAL_ACCESS_CREATE; |
| } |
| if (err) { |
| mlog_errno(err); |
| goto out; |
| } |
| lock_buffer(bh); |
| if (new) |
| memset(bh->b_data, 0, sb->s_blocksize); |
| memcpy(bh->b_data + offset, data, len); |
| flush_dcache_page(bh->b_page); |
| set_buffer_uptodate(bh); |
| unlock_buffer(bh); |
| ocfs2_set_buffer_uptodate(INODE_CACHE(gqinode), bh); |
| err = ocfs2_journal_access_dq(handle, INODE_CACHE(gqinode), bh, |
| ja_type); |
| if (err < 0) { |
| brelse(bh); |
| goto out; |
| } |
| ocfs2_journal_dirty(handle, bh); |
| brelse(bh); |
| out: |
| if (err) { |
| mlog_errno(err); |
| return err; |
| } |
| gqinode->i_version++; |
| ocfs2_mark_inode_dirty(handle, gqinode, oinfo->dqi_gqi_bh); |
| return len; |
| } |
| |
| int ocfs2_lock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex) |
| { |
| int status; |
| struct buffer_head *bh = NULL; |
| |
| status = ocfs2_inode_lock(oinfo->dqi_gqinode, &bh, ex); |
| if (status < 0) |
| return status; |
| spin_lock(&dq_data_lock); |
| if (!oinfo->dqi_gqi_count++) |
| oinfo->dqi_gqi_bh = bh; |
| else |
| WARN_ON(bh != oinfo->dqi_gqi_bh); |
| spin_unlock(&dq_data_lock); |
| if (ex) { |
| inode_lock(oinfo->dqi_gqinode); |
| down_write(&OCFS2_I(oinfo->dqi_gqinode)->ip_alloc_sem); |
| } else { |
| down_read(&OCFS2_I(oinfo->dqi_gqinode)->ip_alloc_sem); |
| } |
| return 0; |
| } |
| |
| void ocfs2_unlock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex) |
| { |
| if (ex) { |
| up_write(&OCFS2_I(oinfo->dqi_gqinode)->ip_alloc_sem); |
| inode_unlock(oinfo->dqi_gqinode); |
| } else { |
| up_read(&OCFS2_I(oinfo->dqi_gqinode)->ip_alloc_sem); |
| } |
| ocfs2_inode_unlock(oinfo->dqi_gqinode, ex); |
| brelse(oinfo->dqi_gqi_bh); |
| spin_lock(&dq_data_lock); |
| if (!--oinfo->dqi_gqi_count) |
| oinfo->dqi_gqi_bh = NULL; |
| spin_unlock(&dq_data_lock); |
| } |
| |
| /* Read information header from global quota file */ |
| int ocfs2_global_read_info(struct super_block *sb, int type) |
| { |
| struct inode *gqinode = NULL; |
| unsigned int ino[OCFS2_MAXQUOTAS] = { USER_QUOTA_SYSTEM_INODE, |
| GROUP_QUOTA_SYSTEM_INODE }; |
| struct ocfs2_global_disk_dqinfo dinfo; |
| struct mem_dqinfo *info = sb_dqinfo(sb, type); |
| struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv; |
| u64 pcount; |
| int status; |
| |
| /* Read global header */ |
| gqinode = ocfs2_get_system_file_inode(OCFS2_SB(sb), ino[type], |
| OCFS2_INVALID_SLOT); |
| if (!gqinode) { |
| mlog(ML_ERROR, "failed to get global quota inode (type=%d)\n", |
| type); |
| status = -EINVAL; |
| goto out_err; |
| } |
| oinfo->dqi_gi.dqi_sb = sb; |
| oinfo->dqi_gi.dqi_type = type; |
| ocfs2_qinfo_lock_res_init(&oinfo->dqi_gqlock, oinfo); |
| oinfo->dqi_gi.dqi_entry_size = sizeof(struct ocfs2_global_disk_dqblk); |
| oinfo->dqi_gi.dqi_ops = &ocfs2_global_ops; |
| oinfo->dqi_gqi_bh = NULL; |
| oinfo->dqi_gqi_count = 0; |
| oinfo->dqi_gqinode = gqinode; |
| status = ocfs2_lock_global_qf(oinfo, 0); |
| if (status < 0) { |
| mlog_errno(status); |
| goto out_err; |
| } |
| |
| status = ocfs2_extent_map_get_blocks(gqinode, 0, &oinfo->dqi_giblk, |
| &pcount, NULL); |
| if (status < 0) |
| goto out_unlock; |
| |
| status = ocfs2_qinfo_lock(oinfo, 0); |
| if (status < 0) |
| goto out_unlock; |
| status = sb->s_op->quota_read(sb, type, (char *)&dinfo, |
| sizeof(struct ocfs2_global_disk_dqinfo), |
| OCFS2_GLOBAL_INFO_OFF); |
| ocfs2_qinfo_unlock(oinfo, 0); |
| ocfs2_unlock_global_qf(oinfo, 0); |
| if (status != sizeof(struct ocfs2_global_disk_dqinfo)) { |
| mlog(ML_ERROR, "Cannot read global quota info (%d).\n", |
| status); |
| if (status >= 0) |
| status = -EIO; |
| mlog_errno(status); |
| goto out_err; |
| } |
| info->dqi_bgrace = le32_to_cpu(dinfo.dqi_bgrace); |
| info->dqi_igrace = le32_to_cpu(dinfo.dqi_igrace); |
| oinfo->dqi_syncms = le32_to_cpu(dinfo.dqi_syncms); |
| oinfo->dqi_gi.dqi_blocks = le32_to_cpu(dinfo.dqi_blocks); |
| oinfo->dqi_gi.dqi_free_blk = le32_to_cpu(dinfo.dqi_free_blk); |
| oinfo->dqi_gi.dqi_free_entry = le32_to_cpu(dinfo.dqi_free_entry); |
| oinfo->dqi_gi.dqi_blocksize_bits = sb->s_blocksize_bits; |
| oinfo->dqi_gi.dqi_usable_bs = sb->s_blocksize - |
| OCFS2_QBLK_RESERVED_SPACE; |
| oinfo->dqi_gi.dqi_qtree_depth = qtree_depth(&oinfo->dqi_gi); |
| INIT_DELAYED_WORK(&oinfo->dqi_sync_work, qsync_work_fn); |
| schedule_delayed_work(&oinfo->dqi_sync_work, |
| msecs_to_jiffies(oinfo->dqi_syncms)); |
| |
| out_err: |
| return status; |
| out_unlock: |
| ocfs2_unlock_global_qf(oinfo, 0); |
| mlog_errno(status); |
| goto out_err; |
| } |
| |
| /* Write information to global quota file. Expects exlusive lock on quota |
| * file inode and quota info */ |
| static int __ocfs2_global_write_info(struct super_block *sb, int type) |
| { |
| struct mem_dqinfo *info = sb_dqinfo(sb, type); |
| struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv; |
| struct ocfs2_global_disk_dqinfo dinfo; |
| ssize_t size; |
| |
| spin_lock(&dq_data_lock); |
| info->dqi_flags &= ~DQF_INFO_DIRTY; |
| dinfo.dqi_bgrace = cpu_to_le32(info->dqi_bgrace); |
| dinfo.dqi_igrace = cpu_to_le32(info->dqi_igrace); |
| spin_unlock(&dq_data_lock); |
| dinfo.dqi_syncms = cpu_to_le32(oinfo->dqi_syncms); |
| dinfo.dqi_blocks = cpu_to_le32(oinfo->dqi_gi.dqi_blocks); |
| dinfo.dqi_free_blk = cpu_to_le32(oinfo->dqi_gi.dqi_free_blk); |
| dinfo.dqi_free_entry = cpu_to_le32(oinfo->dqi_gi.dqi_free_entry); |
| size = sb->s_op->quota_write(sb, type, (char *)&dinfo, |
| sizeof(struct ocfs2_global_disk_dqinfo), |
| OCFS2_GLOBAL_INFO_OFF); |
| if (size != sizeof(struct ocfs2_global_disk_dqinfo)) { |
| mlog(ML_ERROR, "Cannot write global quota info structure\n"); |
| if (size >= 0) |
| size = -EIO; |
| return size; |
| } |
| return 0; |
| } |
| |
| int ocfs2_global_write_info(struct super_block *sb, int type) |
| { |
| int err; |
| struct ocfs2_mem_dqinfo *info = sb_dqinfo(sb, type)->dqi_priv; |
| |
| err = ocfs2_qinfo_lock(info, 1); |
| if (err < 0) |
| return err; |
| err = __ocfs2_global_write_info(sb, type); |
| ocfs2_qinfo_unlock(info, 1); |
| return err; |
| } |
| |
| static int ocfs2_global_qinit_alloc(struct super_block *sb, int type) |
| { |
| struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv; |
| |
| /* |
| * We may need to allocate tree blocks and a leaf block but not the |
| * root block |
| */ |
| return oinfo->dqi_gi.dqi_qtree_depth; |
| } |
| |
| static int ocfs2_calc_global_qinit_credits(struct super_block *sb, int type) |
| { |
| /* We modify all the allocated blocks, tree root, info block and |
| * the inode */ |
| return (ocfs2_global_qinit_alloc(sb, type) + 2) * |
| OCFS2_QUOTA_BLOCK_UPDATE_CREDITS + 1; |
| } |
| |
| /* Sync local information about quota modifications with global quota file. |
| * Caller must have started the transaction and obtained exclusive lock for |
| * global quota file inode */ |
| int __ocfs2_sync_dquot(struct dquot *dquot, int freeing) |
| { |
| int err, err2; |
| struct super_block *sb = dquot->dq_sb; |
| int type = dquot->dq_id.type; |
| struct ocfs2_mem_dqinfo *info = sb_dqinfo(sb, type)->dqi_priv; |
| struct ocfs2_global_disk_dqblk dqblk; |
| s64 spacechange, inodechange; |
| time_t olditime, oldbtime; |
| |
| err = sb->s_op->quota_read(sb, type, (char *)&dqblk, |
| sizeof(struct ocfs2_global_disk_dqblk), |
| dquot->dq_off); |
| if (err != sizeof(struct ocfs2_global_disk_dqblk)) { |
| if (err >= 0) { |
| mlog(ML_ERROR, "Short read from global quota file " |
| "(%u read)\n", err); |
| err = -EIO; |
| } |
| goto out; |
| } |
| |
| /* Update space and inode usage. Get also other information from |
| * global quota file so that we don't overwrite any changes there. |
| * We are */ |
| spin_lock(&dq_data_lock); |
| spacechange = dquot->dq_dqb.dqb_curspace - |
| OCFS2_DQUOT(dquot)->dq_origspace; |
| inodechange = dquot->dq_dqb.dqb_curinodes - |
| OCFS2_DQUOT(dquot)->dq_originodes; |
| olditime = dquot->dq_dqb.dqb_itime; |
| oldbtime = dquot->dq_dqb.dqb_btime; |
| ocfs2_global_disk2memdqb(dquot, &dqblk); |
| trace_ocfs2_sync_dquot(from_kqid(&init_user_ns, dquot->dq_id), |
| dquot->dq_dqb.dqb_curspace, |
| (long long)spacechange, |
| dquot->dq_dqb.dqb_curinodes, |
| (long long)inodechange); |
| if (!test_bit(DQ_LASTSET_B + QIF_SPACE_B, &dquot->dq_flags)) |
| dquot->dq_dqb.dqb_curspace += spacechange; |
| if (!test_bit(DQ_LASTSET_B + QIF_INODES_B, &dquot->dq_flags)) |
| dquot->dq_dqb.dqb_curinodes += inodechange; |
| /* Set properly space grace time... */ |
| if (dquot->dq_dqb.dqb_bsoftlimit && |
| dquot->dq_dqb.dqb_curspace > dquot->dq_dqb.dqb_bsoftlimit) { |
| if (!test_bit(DQ_LASTSET_B + QIF_BTIME_B, &dquot->dq_flags) && |
| oldbtime > 0) { |
| if (dquot->dq_dqb.dqb_btime > 0) |
| dquot->dq_dqb.dqb_btime = |
| min(dquot->dq_dqb.dqb_btime, oldbtime); |
| else |
| dquot->dq_dqb.dqb_btime = oldbtime; |
| } |
| } else { |
| dquot->dq_dqb.dqb_btime = 0; |
| clear_bit(DQ_BLKS_B, &dquot->dq_flags); |
| } |
| /* Set properly inode grace time... */ |
| if (dquot->dq_dqb.dqb_isoftlimit && |
| dquot->dq_dqb.dqb_curinodes > dquot->dq_dqb.dqb_isoftlimit) { |
| if (!test_bit(DQ_LASTSET_B + QIF_ITIME_B, &dquot->dq_flags) && |
| olditime > 0) { |
| if (dquot->dq_dqb.dqb_itime > 0) |
| dquot->dq_dqb.dqb_itime = |
| min(dquot->dq_dqb.dqb_itime, olditime); |
| else |
| dquot->dq_dqb.dqb_itime = olditime; |
| } |
| } else { |
| dquot->dq_dqb.dqb_itime = 0; |
| clear_bit(DQ_INODES_B, &dquot->dq_flags); |
| } |
| /* All information is properly updated, clear the flags */ |
| __clear_bit(DQ_LASTSET_B + QIF_SPACE_B, &dquot->dq_flags); |
| __clear_bit(DQ_LASTSET_B + QIF_INODES_B, &dquot->dq_flags); |
| __clear_bit(DQ_LASTSET_B + QIF_BLIMITS_B, &dquot->dq_flags); |
| __clear_bit(DQ_LASTSET_B + QIF_ILIMITS_B, &dquot->dq_flags); |
| __clear_bit(DQ_LASTSET_B + QIF_BTIME_B, &dquot->dq_flags); |
| __clear_bit(DQ_LASTSET_B + QIF_ITIME_B, &dquot->dq_flags); |
| OCFS2_DQUOT(dquot)->dq_origspace = dquot->dq_dqb.dqb_curspace; |
| OCFS2_DQUOT(dquot)->dq_originodes = dquot->dq_dqb.dqb_curinodes; |
| spin_unlock(&dq_data_lock); |
| err = ocfs2_qinfo_lock(info, freeing); |
| if (err < 0) { |
| mlog(ML_ERROR, "Failed to lock quota info, losing quota write" |
| " (type=%d, id=%u)\n", dquot->dq_id.type, |
| (unsigned)from_kqid(&init_user_ns, dquot->dq_id)); |
| goto out; |
| } |
| if (freeing) |
| OCFS2_DQUOT(dquot)->dq_use_count--; |
| err = qtree_write_dquot(&info->dqi_gi, dquot); |
| if (err < 0) |
| goto out_qlock; |
| if (freeing && !OCFS2_DQUOT(dquot)->dq_use_count) { |
| err = qtree_release_dquot(&info->dqi_gi, dquot); |
| if (info_dirty(sb_dqinfo(sb, type))) { |
| err2 = __ocfs2_global_write_info(sb, type); |
| if (!err) |
| err = err2; |
| } |
| } |
| out_qlock: |
| ocfs2_qinfo_unlock(info, freeing); |
| out: |
| if (err < 0) |
| mlog_errno(err); |
| return err; |
| } |
| |
| /* |
| * Functions for periodic syncing of dquots with global file |
| */ |
| static int ocfs2_sync_dquot_helper(struct dquot *dquot, unsigned long type) |
| { |
| handle_t *handle; |
| struct super_block *sb = dquot->dq_sb; |
| struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv; |
| struct ocfs2_super *osb = OCFS2_SB(sb); |
| int status = 0; |
| |
| trace_ocfs2_sync_dquot_helper(from_kqid(&init_user_ns, dquot->dq_id), |
| dquot->dq_id.type, |
| type, sb->s_id); |
| if (type != dquot->dq_id.type) |
| goto out; |
| status = ocfs2_lock_global_qf(oinfo, 1); |
| if (status < 0) |
| goto out; |
| |
| handle = ocfs2_start_trans(osb, OCFS2_QSYNC_CREDITS); |
| if (IS_ERR(handle)) { |
| status = PTR_ERR(handle); |
| mlog_errno(status); |
| goto out_ilock; |
| } |
| mutex_lock(&sb_dqopt(sb)->dqio_mutex); |
| status = ocfs2_sync_dquot(dquot); |
| if (status < 0) |
| mlog_errno(status); |
| /* We have to write local structure as well... */ |
| status = ocfs2_local_write_dquot(dquot); |
| if (status < 0) |
| mlog_errno(status); |
| mutex_unlock(&sb_dqopt(sb)->dqio_mutex); |
| ocfs2_commit_trans(osb, handle); |
| out_ilock: |
| ocfs2_unlock_global_qf(oinfo, 1); |
| out: |
| return status; |
| } |
| |
| static void qsync_work_fn(struct work_struct *work) |
| { |
| struct ocfs2_mem_dqinfo *oinfo = container_of(work, |
| struct ocfs2_mem_dqinfo, |
| dqi_sync_work.work); |
| struct super_block *sb = oinfo->dqi_gqinode->i_sb; |
| |
| dquot_scan_active(sb, ocfs2_sync_dquot_helper, oinfo->dqi_type); |
| schedule_delayed_work(&oinfo->dqi_sync_work, |
| msecs_to_jiffies(oinfo->dqi_syncms)); |
| } |
| |
| /* |
| * Wrappers for generic quota functions |
| */ |
| |
| static int ocfs2_write_dquot(struct dquot *dquot) |
| { |
| handle_t *handle; |
| struct ocfs2_super *osb = OCFS2_SB(dquot->dq_sb); |
| int status = 0; |
| |
| trace_ocfs2_write_dquot(from_kqid(&init_user_ns, dquot->dq_id), |
| dquot->dq_id.type); |
| |
| handle = ocfs2_start_trans(osb, OCFS2_QWRITE_CREDITS); |
| if (IS_ERR(handle)) { |
| status = PTR_ERR(handle); |
| mlog_errno(status); |
| goto out; |
| } |
| mutex_lock(&sb_dqopt(dquot->dq_sb)->dqio_mutex); |
| status = ocfs2_local_write_dquot(dquot); |
| mutex_unlock(&sb_dqopt(dquot->dq_sb)->dqio_mutex); |
| ocfs2_commit_trans(osb, handle); |
| out: |
| return status; |
| } |
| |
| static int ocfs2_calc_qdel_credits(struct super_block *sb, int type) |
| { |
| struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv; |
| /* |
| * We modify tree, leaf block, global info, local chunk header, |
| * global and local inode; OCFS2_QINFO_WRITE_CREDITS already |
| * accounts for inode update |
| */ |
| return (oinfo->dqi_gi.dqi_qtree_depth + 2) * |
| OCFS2_QUOTA_BLOCK_UPDATE_CREDITS + |
| OCFS2_QINFO_WRITE_CREDITS + |
| OCFS2_INODE_UPDATE_CREDITS; |
| } |
| |
| void ocfs2_drop_dquot_refs(struct work_struct *work) |
| { |
| struct ocfs2_super *osb = container_of(work, struct ocfs2_super, |
| dquot_drop_work); |
| struct llist_node *list; |
| struct ocfs2_dquot *odquot, *next_odquot; |
| |
| list = llist_del_all(&osb->dquot_drop_list); |
| llist_for_each_entry_safe(odquot, next_odquot, list, list) { |
| /* Drop the reference we acquired in ocfs2_dquot_release() */ |
| dqput(&odquot->dq_dquot); |
| } |
| } |
| |
| /* |
| * Called when the last reference to dquot is dropped. If we are called from |
| * downconvert thread, we cannot do all the handling here because grabbing |
| * quota lock could deadlock (the node holding the quota lock could need some |
| * other cluster lock to proceed but with blocked downconvert thread we cannot |
| * release any lock). |
| */ |
| static int ocfs2_release_dquot(struct dquot *dquot) |
| { |
| handle_t *handle; |
| struct ocfs2_mem_dqinfo *oinfo = |
| sb_dqinfo(dquot->dq_sb, dquot->dq_id.type)->dqi_priv; |
| struct ocfs2_super *osb = OCFS2_SB(dquot->dq_sb); |
| int status = 0; |
| |
| trace_ocfs2_release_dquot(from_kqid(&init_user_ns, dquot->dq_id), |
| dquot->dq_id.type); |
| |
| mutex_lock(&dquot->dq_lock); |
| /* Check whether we are not racing with some other dqget() */ |
| if (atomic_read(&dquot->dq_count) > 1) |
| goto out; |
| /* Running from downconvert thread? Postpone quota processing to wq */ |
| if (current == osb->dc_task) { |
| /* |
| * Grab our own reference to dquot and queue it for delayed |
| * dropping. Quota code rechecks after calling |
| * ->release_dquot() and won't free dquot structure. |
| */ |
| dqgrab(dquot); |
| /* First entry on list -> queue work */ |
| if (llist_add(&OCFS2_DQUOT(dquot)->list, &osb->dquot_drop_list)) |
| queue_work(ocfs2_wq, &osb->dquot_drop_work); |
| goto out; |
| } |
| status = ocfs2_lock_global_qf(oinfo, 1); |
| if (status < 0) |
| goto out; |
| handle = ocfs2_start_trans(osb, |
| ocfs2_calc_qdel_credits(dquot->dq_sb, dquot->dq_id.type)); |
| if (IS_ERR(handle)) { |
| status = PTR_ERR(handle); |
| mlog_errno(status); |
| goto out_ilock; |
| } |
| |
| status = ocfs2_global_release_dquot(dquot); |
| if (status < 0) { |
| mlog_errno(status); |
| goto out_trans; |
| } |
| status = ocfs2_local_release_dquot(handle, dquot); |
| /* |
| * If we fail here, we cannot do much as global structure is |
| * already released. So just complain... |
| */ |
| if (status < 0) |
| mlog_errno(status); |
| /* |
| * Clear dq_off so that we search for the structure in quota file next |
| * time we acquire it. The structure might be deleted and reallocated |
| * elsewhere by another node while our dquot structure is on freelist. |
| */ |
| dquot->dq_off = 0; |
| clear_bit(DQ_ACTIVE_B, &dquot->dq_flags); |
| out_trans: |
| ocfs2_commit_trans(osb, handle); |
| out_ilock: |
| ocfs2_unlock_global_qf(oinfo, 1); |
| out: |
| mutex_unlock(&dquot->dq_lock); |
| if (status) |
| mlog_errno(status); |
| return status; |
| } |
| |
| /* |
| * Read global dquot structure from disk or create it if it does |
| * not exist. Also update use count of the global structure and |
| * create structure in node-local quota file. |
| */ |
| static int ocfs2_acquire_dquot(struct dquot *dquot) |
| { |
| int status = 0, err; |
| int ex = 0; |
| struct super_block *sb = dquot->dq_sb; |
| struct ocfs2_super *osb = OCFS2_SB(sb); |
| int type = dquot->dq_id.type; |
| struct ocfs2_mem_dqinfo *info = sb_dqinfo(sb, type)->dqi_priv; |
| struct inode *gqinode = info->dqi_gqinode; |
| int need_alloc = ocfs2_global_qinit_alloc(sb, type); |
| handle_t *handle; |
| |
| trace_ocfs2_acquire_dquot(from_kqid(&init_user_ns, dquot->dq_id), |
| type); |
| mutex_lock(&dquot->dq_lock); |
| /* |
| * We need an exclusive lock, because we're going to update use count |
| * and instantiate possibly new dquot structure |
| */ |
| status = ocfs2_lock_global_qf(info, 1); |
| if (status < 0) |
| goto out; |
| status = ocfs2_qinfo_lock(info, 0); |
| if (status < 0) |
| goto out_dq; |
| /* |
| * We always want to read dquot structure from disk because we don't |
| * know what happened with it while it was on freelist. |
| */ |
| status = qtree_read_dquot(&info->dqi_gi, dquot); |
| ocfs2_qinfo_unlock(info, 0); |
| if (status < 0) |
| goto out_dq; |
| |
| OCFS2_DQUOT(dquot)->dq_use_count++; |
| OCFS2_DQUOT(dquot)->dq_origspace = dquot->dq_dqb.dqb_curspace; |
| OCFS2_DQUOT(dquot)->dq_originodes = dquot->dq_dqb.dqb_curinodes; |
| if (!dquot->dq_off) { /* No real quota entry? */ |
| ex = 1; |
| /* |
| * Add blocks to quota file before we start a transaction since |
| * locking allocators ranks above a transaction start |
| */ |
| WARN_ON(journal_current_handle()); |
| status = ocfs2_extend_no_holes(gqinode, NULL, |
| i_size_read(gqinode) + (need_alloc << sb->s_blocksize_bits), |
| i_size_read(gqinode)); |
| if (status < 0) |
| goto out_dq; |
| } |
| |
| handle = ocfs2_start_trans(osb, |
| ocfs2_calc_global_qinit_credits(sb, type)); |
| if (IS_ERR(handle)) { |
| status = PTR_ERR(handle); |
| goto out_dq; |
| } |
| status = ocfs2_qinfo_lock(info, ex); |
| if (status < 0) |
| goto out_trans; |
| status = qtree_write_dquot(&info->dqi_gi, dquot); |
| if (ex && info_dirty(sb_dqinfo(sb, type))) { |
| err = __ocfs2_global_write_info(sb, type); |
| if (!status) |
| status = err; |
| } |
| ocfs2_qinfo_unlock(info, ex); |
| out_trans: |
| ocfs2_commit_trans(osb, handle); |
| out_dq: |
| ocfs2_unlock_global_qf(info, 1); |
| if (status < 0) |
| goto out; |
| |
| status = ocfs2_create_local_dquot(dquot); |
| if (status < 0) |
| goto out; |
| set_bit(DQ_ACTIVE_B, &dquot->dq_flags); |
| out: |
| mutex_unlock(&dquot->dq_lock); |
| if (status) |
| mlog_errno(status); |
| return status; |
| } |
| |
| static int ocfs2_get_next_id(struct super_block *sb, struct kqid *qid) |
| { |
| int type = qid->type; |
| struct ocfs2_mem_dqinfo *info = sb_dqinfo(sb, type)->dqi_priv; |
| int status = 0; |
| |
| trace_ocfs2_get_next_id(from_kqid(&init_user_ns, *qid), type); |
| status = ocfs2_lock_global_qf(info, 0); |
| if (status < 0) |
| goto out; |
| status = ocfs2_qinfo_lock(info, 0); |
| if (status < 0) |
| goto out_global; |
| status = qtree_get_next_id(&info->dqi_gi, qid); |
| ocfs2_qinfo_unlock(info, 0); |
| out_global: |
| ocfs2_unlock_global_qf(info, 0); |
| out: |
| /* Avoid logging ENOENT since it just means there isn't next ID */ |
| if (status && status != -ENOENT) |
| mlog_errno(status); |
| return status; |
| } |
| |
| static int ocfs2_mark_dquot_dirty(struct dquot *dquot) |
| { |
| unsigned long mask = (1 << (DQ_LASTSET_B + QIF_ILIMITS_B)) | |
| (1 << (DQ_LASTSET_B + QIF_BLIMITS_B)) | |
| (1 << (DQ_LASTSET_B + QIF_INODES_B)) | |
| (1 << (DQ_LASTSET_B + QIF_SPACE_B)) | |
| (1 << (DQ_LASTSET_B + QIF_BTIME_B)) | |
| (1 << (DQ_LASTSET_B + QIF_ITIME_B)); |
| int sync = 0; |
| int status; |
| struct super_block *sb = dquot->dq_sb; |
| int type = dquot->dq_id.type; |
| struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv; |
| handle_t *handle; |
| struct ocfs2_super *osb = OCFS2_SB(sb); |
| |
| trace_ocfs2_mark_dquot_dirty(from_kqid(&init_user_ns, dquot->dq_id), |
| type); |
| |
| /* In case user set some limits, sync dquot immediately to global |
| * quota file so that information propagates quicker */ |
| spin_lock(&dq_data_lock); |
| if (dquot->dq_flags & mask) |
| sync = 1; |
| spin_unlock(&dq_data_lock); |
| /* This is a slight hack but we can't afford getting global quota |
| * lock if we already have a transaction started. */ |
| if (!sync || journal_current_handle()) { |
| status = ocfs2_write_dquot(dquot); |
| goto out; |
| } |
| status = ocfs2_lock_global_qf(oinfo, 1); |
| if (status < 0) |
| goto out; |
| handle = ocfs2_start_trans(osb, OCFS2_QSYNC_CREDITS); |
| if (IS_ERR(handle)) { |
| status = PTR_ERR(handle); |
| mlog_errno(status); |
| goto out_ilock; |
| } |
| mutex_lock(&sb_dqopt(sb)->dqio_mutex); |
| status = ocfs2_sync_dquot(dquot); |
| if (status < 0) { |
| mlog_errno(status); |
| goto out_dlock; |
| } |
| /* Now write updated local dquot structure */ |
| status = ocfs2_local_write_dquot(dquot); |
| out_dlock: |
| mutex_unlock(&sb_dqopt(sb)->dqio_mutex); |
| ocfs2_commit_trans(osb, handle); |
| out_ilock: |
| ocfs2_unlock_global_qf(oinfo, 1); |
| out: |
| if (status) |
| mlog_errno(status); |
| return status; |
| } |
| |
| /* This should happen only after set_dqinfo(). */ |
| static int ocfs2_write_info(struct super_block *sb, int type) |
| { |
| handle_t *handle; |
| int status = 0; |
| struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv; |
| |
| status = ocfs2_lock_global_qf(oinfo, 1); |
| if (status < 0) |
| goto out; |
| handle = ocfs2_start_trans(OCFS2_SB(sb), OCFS2_QINFO_WRITE_CREDITS); |
| if (IS_ERR(handle)) { |
| status = PTR_ERR(handle); |
| mlog_errno(status); |
| goto out_ilock; |
| } |
| status = dquot_commit_info(sb, type); |
| ocfs2_commit_trans(OCFS2_SB(sb), handle); |
| out_ilock: |
| ocfs2_unlock_global_qf(oinfo, 1); |
| out: |
| if (status) |
| mlog_errno(status); |
| return status; |
| } |
| |
| static struct dquot *ocfs2_alloc_dquot(struct super_block *sb, int type) |
| { |
| struct ocfs2_dquot *dquot = |
| kmem_cache_zalloc(ocfs2_dquot_cachep, GFP_NOFS); |
| |
| if (!dquot) |
| return NULL; |
| return &dquot->dq_dquot; |
| } |
| |
| static void ocfs2_destroy_dquot(struct dquot *dquot) |
| { |
| kmem_cache_free(ocfs2_dquot_cachep, dquot); |
| } |
| |
| const struct dquot_operations ocfs2_quota_operations = { |
| /* We never make dquot dirty so .write_dquot is never called */ |
| .acquire_dquot = ocfs2_acquire_dquot, |
| .release_dquot = ocfs2_release_dquot, |
| .mark_dirty = ocfs2_mark_dquot_dirty, |
| .write_info = ocfs2_write_info, |
| .alloc_dquot = ocfs2_alloc_dquot, |
| .destroy_dquot = ocfs2_destroy_dquot, |
| .get_next_id = ocfs2_get_next_id, |
| }; |