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1017 lines
30 KiB
1017 lines
30 KiB
// SPDX-License-Identifier: GPL-2.0 |
|
/* |
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* Implementation of operations over global quota file |
|
*/ |
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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 <linux/iversion.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 |
|
* by dqio_sem 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): |
|
* Normal filesystem operation: |
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* start_trans -> dqio_sem -> write to lf |
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* Syncing of local and global file: |
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* ocfs2_lock_global_qf -> start_trans -> dqio_sem -> 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_sem -> 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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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)) { |
|
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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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, |
|
le32_to_cpu(d->dqb_id)), |
|
dquot->dq_id); |
|
} |
|
|
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const struct qtree_fmt_operations ocfs2_global_ops = { |
|
.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 |
|
* leave the filesystem running. We know any error is |
|
* 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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int ocfs2_read_quota_phys_block(struct inode *inode, u64 p_block, |
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struct buffer_head **bhp) |
|
{ |
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int rc; |
|
|
|
*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); |
|
return rc; |
|
} |
|
|
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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; |
|
if (off + len > i_size) |
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len = i_size - off; |
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toread = len; |
|
while (toread > 0) { |
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tocopy = min_t(size_t, (sb->s_blocksize - offset), toread); |
|
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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|
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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; |
|
|
|
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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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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|
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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) |
|
goto out; |
|
new = 1; |
|
} |
|
err = ocfs2_extent_map_get_blocks(gqinode, blk, &pblock, &pcount, NULL); |
|
if (err) { |
|
mlog_errno(err); |
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goto out; |
|
} |
|
/* 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; |
|
} |
|
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); |
|
if (err < 0) { |
|
brelse(bh); |
|
goto out; |
|
} |
|
ocfs2_journal_dirty(handle, bh); |
|
brelse(bh); |
|
out: |
|
if (err) { |
|
mlog_errno(err); |
|
return err; |
|
} |
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inode_inc_iversion(gqinode); |
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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); |
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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 quota_info *dqopt = sb_dqopt(sb); |
|
struct ocfs2_mem_dqinfo *info = dqopt->info[type].dqi_priv; |
|
|
|
down_write(&dqopt->dqio_sem); |
|
err = ocfs2_qinfo_lock(info, 1); |
|
if (err < 0) |
|
goto out_sem; |
|
err = __ocfs2_global_write_info(sb, type); |
|
ocfs2_qinfo_unlock(info, 1); |
|
out_sem: |
|
up_write(&dqopt->dqio_sem); |
|
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(&dquot->dq_dqb_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(&dquot->dq_dqb_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; |
|
} |
|
down_write(&sb_dqopt(sb)->dqio_sem); |
|
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); |
|
up_write(&sb_dqopt(sb)->dqio_sem); |
|
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; |
|
|
|
/* |
|
* We have to be careful here not to deadlock on s_umount as umount |
|
* disabling quotas may be in progress and it waits for this work to |
|
* complete. If trylock fails, we'll do the sync next time... |
|
*/ |
|
if (down_read_trylock(&sb->s_umount)) { |
|
dquot_scan_active(sb, ocfs2_sync_dquot_helper, oinfo->dqi_type); |
|
up_read(&sb->s_umount); |
|
} |
|
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; |
|
} |
|
down_write(&sb_dqopt(dquot->dq_sb)->dqio_sem); |
|
status = ocfs2_local_write_dquot(dquot); |
|
up_write(&sb_dqopt(dquot->dq_sb)->dqio_sem); |
|
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 (dquot_is_busy(dquot)) |
|
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(&dquot->dq_dqb_lock); |
|
if (dquot->dq_flags & mask) |
|
sync = 1; |
|
spin_unlock(&dquot->dq_dqb_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; |
|
} |
|
down_write(&sb_dqopt(sb)->dqio_sem); |
|
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: |
|
up_write(&sb_dqopt(sb)->dqio_sem); |
|
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, |
|
};
|
|
|