1004 lines
29 KiB
C
1004 lines
29 KiB
C
/*
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* Implementation of operations over global quota file
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*/
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#include <linux/spinlock.h>
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#include <linux/fs.h>
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#include <linux/slab.h>
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#include <linux/quota.h>
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#include <linux/quotaops.h>
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#include <linux/dqblk_qtree.h>
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#include <linux/jiffies.h>
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#include <linux/writeback.h>
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#include <linux/workqueue.h>
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#include <linux/llist.h>
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#include <cluster/masklog.h>
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#include "ocfs2_fs.h"
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#include "ocfs2.h"
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#include "alloc.h"
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#include "blockcheck.h"
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#include "inode.h"
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#include "journal.h"
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#include "file.h"
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#include "sysfile.h"
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#include "dlmglue.h"
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#include "uptodate.h"
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#include "super.h"
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#include "buffer_head_io.h"
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#include "quota.h"
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#include "ocfs2_trace.h"
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/*
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* Locking of quotas with OCFS2 is rather complex. Here are rules that
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* should be obeyed by all the functions:
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* - any write of quota structure (either to local or global file) is protected
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* by dqio_mutex or dquot->dq_lock.
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* - any modification of global quota file holds inode cluster lock, i_mutex,
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* and ip_alloc_sem of the global quota file (achieved by
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* ocfs2_lock_global_qf). It also has to hold qinfo_lock.
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* - an allocation of new blocks for local quota file is protected by
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* its ip_alloc_sem
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*
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* A rough sketch of locking dependencies (lf = local file, gf = global file):
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* Normal filesystem operation:
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* start_trans -> dqio_mutex -> write to lf
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* Syncing of local and global file:
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* ocfs2_lock_global_qf -> start_trans -> dqio_mutex -> qinfo_lock ->
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* write to gf
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* -> write to lf
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* Acquire dquot for the first time:
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* dq_lock -> ocfs2_lock_global_qf -> qinfo_lock -> read from gf
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* -> alloc space for gf
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* -> start_trans -> qinfo_lock -> write to gf
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* -> ip_alloc_sem of lf -> alloc space for lf
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* -> write to lf
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* Release last reference to dquot:
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* dq_lock -> ocfs2_lock_global_qf -> start_trans -> qinfo_lock -> write to gf
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* -> write to lf
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* Note that all the above operations also hold the inode cluster lock of lf.
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* Recovery:
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* inode cluster lock of recovered lf
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* -> read bitmaps -> ip_alloc_sem of lf
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* -> ocfs2_lock_global_qf -> start_trans -> dqio_mutex -> qinfo_lock ->
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* write to gf
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*/
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static void qsync_work_fn(struct work_struct *work);
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static void ocfs2_global_disk2memdqb(struct dquot *dquot, void *dp)
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{
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struct ocfs2_global_disk_dqblk *d = dp;
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struct mem_dqblk *m = &dquot->dq_dqb;
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/* Update from disk only entries not set by the admin */
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if (!test_bit(DQ_LASTSET_B + QIF_ILIMITS_B, &dquot->dq_flags)) {
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m->dqb_ihardlimit = le64_to_cpu(d->dqb_ihardlimit);
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m->dqb_isoftlimit = le64_to_cpu(d->dqb_isoftlimit);
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}
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if (!test_bit(DQ_LASTSET_B + QIF_INODES_B, &dquot->dq_flags))
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m->dqb_curinodes = le64_to_cpu(d->dqb_curinodes);
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if (!test_bit(DQ_LASTSET_B + QIF_BLIMITS_B, &dquot->dq_flags)) {
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m->dqb_bhardlimit = le64_to_cpu(d->dqb_bhardlimit);
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m->dqb_bsoftlimit = le64_to_cpu(d->dqb_bsoftlimit);
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}
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if (!test_bit(DQ_LASTSET_B + QIF_SPACE_B, &dquot->dq_flags))
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m->dqb_curspace = le64_to_cpu(d->dqb_curspace);
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if (!test_bit(DQ_LASTSET_B + QIF_BTIME_B, &dquot->dq_flags))
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m->dqb_btime = le64_to_cpu(d->dqb_btime);
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if (!test_bit(DQ_LASTSET_B + QIF_ITIME_B, &dquot->dq_flags))
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m->dqb_itime = le64_to_cpu(d->dqb_itime);
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OCFS2_DQUOT(dquot)->dq_use_count = le32_to_cpu(d->dqb_use_count);
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}
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static void ocfs2_global_mem2diskdqb(void *dp, struct dquot *dquot)
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{
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struct ocfs2_global_disk_dqblk *d = dp;
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struct mem_dqblk *m = &dquot->dq_dqb;
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d->dqb_id = cpu_to_le32(from_kqid(&init_user_ns, dquot->dq_id));
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d->dqb_use_count = cpu_to_le32(OCFS2_DQUOT(dquot)->dq_use_count);
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d->dqb_ihardlimit = cpu_to_le64(m->dqb_ihardlimit);
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d->dqb_isoftlimit = cpu_to_le64(m->dqb_isoftlimit);
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d->dqb_curinodes = cpu_to_le64(m->dqb_curinodes);
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d->dqb_bhardlimit = cpu_to_le64(m->dqb_bhardlimit);
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d->dqb_bsoftlimit = cpu_to_le64(m->dqb_bsoftlimit);
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d->dqb_curspace = cpu_to_le64(m->dqb_curspace);
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d->dqb_btime = cpu_to_le64(m->dqb_btime);
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d->dqb_itime = cpu_to_le64(m->dqb_itime);
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d->dqb_pad1 = d->dqb_pad2 = 0;
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}
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static int ocfs2_global_is_id(void *dp, struct dquot *dquot)
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{
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struct ocfs2_global_disk_dqblk *d = dp;
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struct ocfs2_mem_dqinfo *oinfo =
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sb_dqinfo(dquot->dq_sb, dquot->dq_id.type)->dqi_priv;
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if (qtree_entry_unused(&oinfo->dqi_gi, dp))
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return 0;
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return qid_eq(make_kqid(&init_user_ns, dquot->dq_id.type,
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le32_to_cpu(d->dqb_id)),
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dquot->dq_id);
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}
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const struct qtree_fmt_operations ocfs2_global_ops = {
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.mem2disk_dqblk = ocfs2_global_mem2diskdqb,
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.disk2mem_dqblk = ocfs2_global_disk2memdqb,
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.is_id = ocfs2_global_is_id,
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};
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int ocfs2_validate_quota_block(struct super_block *sb, struct buffer_head *bh)
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{
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struct ocfs2_disk_dqtrailer *dqt =
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ocfs2_block_dqtrailer(sb->s_blocksize, bh->b_data);
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trace_ocfs2_validate_quota_block((unsigned long long)bh->b_blocknr);
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BUG_ON(!buffer_uptodate(bh));
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/*
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* If the ecc fails, we return the error but otherwise
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* leave the filesystem running. We know any error is
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* local to this block.
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*/
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return ocfs2_validate_meta_ecc(sb, bh->b_data, &dqt->dq_check);
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}
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int ocfs2_read_quota_phys_block(struct inode *inode, u64 p_block,
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struct buffer_head **bhp)
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{
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int rc;
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*bhp = NULL;
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rc = ocfs2_read_blocks(INODE_CACHE(inode), p_block, 1, bhp, 0,
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ocfs2_validate_quota_block);
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if (rc)
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mlog_errno(rc);
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return rc;
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}
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/* Read data from global quotafile - avoid pagecache and such because we cannot
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* afford acquiring the locks... We use quota cluster lock to serialize
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* operations. Caller is responsible for acquiring it. */
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ssize_t ocfs2_quota_read(struct super_block *sb, int type, char *data,
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size_t len, loff_t off)
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{
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struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
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struct inode *gqinode = oinfo->dqi_gqinode;
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loff_t i_size = i_size_read(gqinode);
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int offset = off & (sb->s_blocksize - 1);
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sector_t blk = off >> sb->s_blocksize_bits;
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int err = 0;
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struct buffer_head *bh;
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size_t toread, tocopy;
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u64 pblock = 0, pcount = 0;
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if (off > i_size)
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return 0;
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if (off + len > i_size)
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len = i_size - off;
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toread = len;
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while (toread > 0) {
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tocopy = min_t(size_t, (sb->s_blocksize - offset), toread);
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if (!pcount) {
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err = ocfs2_extent_map_get_blocks(gqinode, blk, &pblock,
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&pcount, NULL);
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if (err) {
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mlog_errno(err);
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return err;
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}
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} else {
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pcount--;
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pblock++;
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}
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bh = NULL;
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err = ocfs2_read_quota_phys_block(gqinode, pblock, &bh);
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if (err) {
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mlog_errno(err);
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return err;
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}
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memcpy(data, bh->b_data + offset, tocopy);
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brelse(bh);
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offset = 0;
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toread -= tocopy;
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data += tocopy;
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blk++;
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}
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return len;
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}
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/* Write to quotafile (we know the transaction is already started and has
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* enough credits) */
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ssize_t ocfs2_quota_write(struct super_block *sb, int type,
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const char *data, size_t len, loff_t off)
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{
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struct mem_dqinfo *info = sb_dqinfo(sb, type);
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struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
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struct inode *gqinode = oinfo->dqi_gqinode;
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int offset = off & (sb->s_blocksize - 1);
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sector_t blk = off >> sb->s_blocksize_bits;
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int err = 0, new = 0, ja_type;
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struct buffer_head *bh = NULL;
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handle_t *handle = journal_current_handle();
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u64 pblock, pcount;
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if (!handle) {
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mlog(ML_ERROR, "Quota write (off=%llu, len=%llu) cancelled "
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"because transaction was not started.\n",
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(unsigned long long)off, (unsigned long long)len);
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return -EIO;
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}
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if (len > sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE - offset) {
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WARN_ON(1);
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len = sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE - offset;
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}
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if (i_size_read(gqinode) < off + len) {
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loff_t rounded_end =
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ocfs2_align_bytes_to_blocks(sb, off + len);
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/* Space is already allocated in ocfs2_acquire_dquot() */
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err = ocfs2_simple_size_update(gqinode,
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oinfo->dqi_gqi_bh,
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rounded_end);
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if (err < 0)
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goto out;
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new = 1;
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}
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err = ocfs2_extent_map_get_blocks(gqinode, blk, &pblock, &pcount, NULL);
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if (err) {
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mlog_errno(err);
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goto out;
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}
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/* Not rewriting whole block? */
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if ((offset || len < sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE) &&
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!new) {
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err = ocfs2_read_quota_phys_block(gqinode, pblock, &bh);
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ja_type = OCFS2_JOURNAL_ACCESS_WRITE;
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} else {
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bh = sb_getblk(sb, pblock);
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if (!bh)
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err = -ENOMEM;
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ja_type = OCFS2_JOURNAL_ACCESS_CREATE;
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}
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if (err) {
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mlog_errno(err);
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goto out;
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}
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lock_buffer(bh);
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if (new)
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memset(bh->b_data, 0, sb->s_blocksize);
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memcpy(bh->b_data + offset, data, len);
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flush_dcache_page(bh->b_page);
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set_buffer_uptodate(bh);
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unlock_buffer(bh);
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ocfs2_set_buffer_uptodate(INODE_CACHE(gqinode), bh);
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err = ocfs2_journal_access_dq(handle, INODE_CACHE(gqinode), bh,
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ja_type);
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if (err < 0) {
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brelse(bh);
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goto out;
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}
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ocfs2_journal_dirty(handle, bh);
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brelse(bh);
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out:
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if (err) {
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mlog_errno(err);
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return err;
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}
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gqinode->i_version++;
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ocfs2_mark_inode_dirty(handle, gqinode, oinfo->dqi_gqi_bh);
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return len;
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}
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int ocfs2_lock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex)
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{
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int status;
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struct buffer_head *bh = NULL;
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status = ocfs2_inode_lock(oinfo->dqi_gqinode, &bh, ex);
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if (status < 0)
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return status;
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spin_lock(&dq_data_lock);
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if (!oinfo->dqi_gqi_count++)
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oinfo->dqi_gqi_bh = bh;
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else
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WARN_ON(bh != oinfo->dqi_gqi_bh);
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spin_unlock(&dq_data_lock);
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if (ex) {
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inode_lock(oinfo->dqi_gqinode);
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down_write(&OCFS2_I(oinfo->dqi_gqinode)->ip_alloc_sem);
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} else {
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down_read(&OCFS2_I(oinfo->dqi_gqinode)->ip_alloc_sem);
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}
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return 0;
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}
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void ocfs2_unlock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex)
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{
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if (ex) {
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up_write(&OCFS2_I(oinfo->dqi_gqinode)->ip_alloc_sem);
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inode_unlock(oinfo->dqi_gqinode);
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} else {
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up_read(&OCFS2_I(oinfo->dqi_gqinode)->ip_alloc_sem);
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}
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ocfs2_inode_unlock(oinfo->dqi_gqinode, ex);
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brelse(oinfo->dqi_gqi_bh);
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spin_lock(&dq_data_lock);
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if (!--oinfo->dqi_gqi_count)
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oinfo->dqi_gqi_bh = NULL;
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spin_unlock(&dq_data_lock);
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}
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/* Read information header from global quota file */
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int ocfs2_global_read_info(struct super_block *sb, int type)
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{
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struct inode *gqinode = NULL;
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unsigned int ino[OCFS2_MAXQUOTAS] = { USER_QUOTA_SYSTEM_INODE,
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GROUP_QUOTA_SYSTEM_INODE };
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struct ocfs2_global_disk_dqinfo dinfo;
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struct mem_dqinfo *info = sb_dqinfo(sb, type);
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struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
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u64 pcount;
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int status;
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/* Read global header */
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gqinode = ocfs2_get_system_file_inode(OCFS2_SB(sb), ino[type],
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OCFS2_INVALID_SLOT);
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if (!gqinode) {
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mlog(ML_ERROR, "failed to get global quota inode (type=%d)\n",
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type);
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status = -EINVAL;
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goto out_err;
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}
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oinfo->dqi_gi.dqi_sb = sb;
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oinfo->dqi_gi.dqi_type = type;
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ocfs2_qinfo_lock_res_init(&oinfo->dqi_gqlock, oinfo);
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oinfo->dqi_gi.dqi_entry_size = sizeof(struct ocfs2_global_disk_dqblk);
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oinfo->dqi_gi.dqi_ops = &ocfs2_global_ops;
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oinfo->dqi_gqi_bh = NULL;
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oinfo->dqi_gqi_count = 0;
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oinfo->dqi_gqinode = gqinode;
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status = ocfs2_lock_global_qf(oinfo, 0);
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if (status < 0) {
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mlog_errno(status);
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goto out_err;
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}
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status = ocfs2_extent_map_get_blocks(gqinode, 0, &oinfo->dqi_giblk,
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&pcount, NULL);
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if (status < 0)
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goto out_unlock;
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status = ocfs2_qinfo_lock(oinfo, 0);
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if (status < 0)
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goto out_unlock;
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status = sb->s_op->quota_read(sb, type, (char *)&dinfo,
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sizeof(struct ocfs2_global_disk_dqinfo),
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OCFS2_GLOBAL_INFO_OFF);
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ocfs2_qinfo_unlock(oinfo, 0);
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ocfs2_unlock_global_qf(oinfo, 0);
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if (status != sizeof(struct ocfs2_global_disk_dqinfo)) {
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mlog(ML_ERROR, "Cannot read global quota info (%d).\n",
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status);
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if (status >= 0)
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status = -EIO;
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mlog_errno(status);
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goto out_err;
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}
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info->dqi_bgrace = le32_to_cpu(dinfo.dqi_bgrace);
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info->dqi_igrace = le32_to_cpu(dinfo.dqi_igrace);
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oinfo->dqi_syncms = le32_to_cpu(dinfo.dqi_syncms);
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oinfo->dqi_gi.dqi_blocks = le32_to_cpu(dinfo.dqi_blocks);
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oinfo->dqi_gi.dqi_free_blk = le32_to_cpu(dinfo.dqi_free_blk);
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oinfo->dqi_gi.dqi_free_entry = le32_to_cpu(dinfo.dqi_free_entry);
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oinfo->dqi_gi.dqi_blocksize_bits = sb->s_blocksize_bits;
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oinfo->dqi_gi.dqi_usable_bs = sb->s_blocksize -
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OCFS2_QBLK_RESERVED_SPACE;
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oinfo->dqi_gi.dqi_qtree_depth = qtree_depth(&oinfo->dqi_gi);
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INIT_DELAYED_WORK(&oinfo->dqi_sync_work, qsync_work_fn);
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schedule_delayed_work(&oinfo->dqi_sync_work,
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msecs_to_jiffies(oinfo->dqi_syncms));
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out_err:
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return status;
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out_unlock:
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ocfs2_unlock_global_qf(oinfo, 0);
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mlog_errno(status);
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goto out_err;
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}
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/* Write information to global quota file. Expects exlusive lock on quota
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* file inode and quota info */
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static int __ocfs2_global_write_info(struct super_block *sb, int type)
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{
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struct mem_dqinfo *info = sb_dqinfo(sb, type);
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struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
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struct ocfs2_global_disk_dqinfo dinfo;
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ssize_t size;
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spin_lock(&dq_data_lock);
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info->dqi_flags &= ~DQF_INFO_DIRTY;
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dinfo.dqi_bgrace = cpu_to_le32(info->dqi_bgrace);
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dinfo.dqi_igrace = cpu_to_le32(info->dqi_igrace);
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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;
|
|
time64_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(osb->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);
|
|
if (!sb_has_quota_loaded(sb, type)) {
|
|
status = -ESRCH;
|
|
goto out;
|
|
}
|
|
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 and
|
|
* ESRCH which means quota isn't enabled for the filesystem.
|
|
*/
|
|
if (status && status != -ENOENT && status != -ESRCH)
|
|
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,
|
|
};
|