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authorJan Kara <jack@suse.cz>2017-06-08 14:39:48 +0200
committerJan Kara <jack@suse.cz>2017-08-17 18:52:48 +0200
commitbc8230ee8e2ba967af780cdaf2dcc0f8e5eb45ca (patch)
treee35a0236c766c6e9db88548fb8ff0dc7861119e2 /fs/ocfs2
parentaae4e7a8bc44722fe70d58920a36916b1043195e (diff)
downloadlinux-bc8230ee8e2ba967af780cdaf2dcc0f8e5eb45ca.tar.bz2
quota: Convert dqio_mutex to rwsem
Convert dqio_mutex to rwsem and call it dqio_sem. No functional changes yet. Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs/ocfs2')
-rw-r--r--fs/ocfs2/quota_global.c20
-rw-r--r--fs/ocfs2/quota_local.c10
2 files changed, 15 insertions, 15 deletions
diff --git a/fs/ocfs2/quota_global.c b/fs/ocfs2/quota_global.c
index cec495a921e3..4134d557a8e5 100644
--- a/fs/ocfs2/quota_global.c
+++ b/fs/ocfs2/quota_global.c
@@ -33,7 +33,7 @@
* Locking of quotas with OCFS2 is rather complex. Here are rules that
* should be obeyed by all the functions:
* - any write of quota structure (either to local or global file) is protected
- * by dqio_mutex or dquot->dq_lock.
+ * by dqio_sem or dquot->dq_lock.
* - any modification of global quota file holds inode cluster lock, i_mutex,
* and ip_alloc_sem of the global quota file (achieved by
* ocfs2_lock_global_qf). It also has to hold qinfo_lock.
@@ -42,9 +42,9 @@
*
* A rough sketch of locking dependencies (lf = local file, gf = global file):
* Normal filesystem operation:
- * start_trans -> dqio_mutex -> write to lf
+ * start_trans -> dqio_sem -> write to lf
* Syncing of local and global file:
- * ocfs2_lock_global_qf -> start_trans -> dqio_mutex -> qinfo_lock ->
+ * ocfs2_lock_global_qf -> start_trans -> dqio_sem -> qinfo_lock ->
* write to gf
* -> write to lf
* Acquire dquot for the first time:
@@ -60,7 +60,7 @@
* Recovery:
* inode cluster lock of recovered lf
* -> read bitmaps -> ip_alloc_sem of lf
- * -> ocfs2_lock_global_qf -> start_trans -> dqio_mutex -> qinfo_lock ->
+ * -> ocfs2_lock_global_qf -> start_trans -> dqio_sem -> qinfo_lock ->
* write to gf
*/
@@ -611,7 +611,7 @@ static int ocfs2_sync_dquot_helper(struct dquot *dquot, unsigned long type)
mlog_errno(status);
goto out_ilock;
}
- mutex_lock(&sb_dqopt(sb)->dqio_mutex);
+ down_write(&sb_dqopt(sb)->dqio_sem);
status = ocfs2_sync_dquot(dquot);
if (status < 0)
mlog_errno(status);
@@ -619,7 +619,7 @@ static int ocfs2_sync_dquot_helper(struct dquot *dquot, unsigned long type)
status = ocfs2_local_write_dquot(dquot);
if (status < 0)
mlog_errno(status);
- mutex_unlock(&sb_dqopt(sb)->dqio_mutex);
+ up_write(&sb_dqopt(sb)->dqio_sem);
ocfs2_commit_trans(osb, handle);
out_ilock:
ocfs2_unlock_global_qf(oinfo, 1);
@@ -666,9 +666,9 @@ static int ocfs2_write_dquot(struct dquot *dquot)
mlog_errno(status);
goto out;
}
- mutex_lock(&sb_dqopt(dquot->dq_sb)->dqio_mutex);
+ down_write(&sb_dqopt(dquot->dq_sb)->dqio_sem);
status = ocfs2_local_write_dquot(dquot);
- mutex_unlock(&sb_dqopt(dquot->dq_sb)->dqio_mutex);
+ up_write(&sb_dqopt(dquot->dq_sb)->dqio_sem);
ocfs2_commit_trans(osb, handle);
out:
return status;
@@ -939,7 +939,7 @@ static int ocfs2_mark_dquot_dirty(struct dquot *dquot)
mlog_errno(status);
goto out_ilock;
}
- mutex_lock(&sb_dqopt(sb)->dqio_mutex);
+ down_write(&sb_dqopt(sb)->dqio_sem);
status = ocfs2_sync_dquot(dquot);
if (status < 0) {
mlog_errno(status);
@@ -948,7 +948,7 @@ static int ocfs2_mark_dquot_dirty(struct dquot *dquot)
/* Now write updated local dquot structure */
status = ocfs2_local_write_dquot(dquot);
out_dlock:
- mutex_unlock(&sb_dqopt(sb)->dqio_mutex);
+ up_write(&sb_dqopt(sb)->dqio_sem);
ocfs2_commit_trans(osb, handle);
out_ilock:
ocfs2_unlock_global_qf(oinfo, 1);
diff --git a/fs/ocfs2/quota_local.c b/fs/ocfs2/quota_local.c
index 32c5a40c1257..1311eff1c050 100644
--- a/fs/ocfs2/quota_local.c
+++ b/fs/ocfs2/quota_local.c
@@ -520,7 +520,7 @@ static int ocfs2_recover_local_quota_file(struct inode *lqinode,
mlog_errno(status);
goto out_drop_lock;
}
- mutex_lock(&sb_dqopt(sb)->dqio_mutex);
+ down_write(&sb_dqopt(sb)->dqio_sem);
spin_lock(&dq_data_lock);
/* Add usage from quota entry into quota changes
* of our node. Auxiliary variables are important
@@ -553,7 +553,7 @@ static int ocfs2_recover_local_quota_file(struct inode *lqinode,
unlock_buffer(qbh);
ocfs2_journal_dirty(handle, qbh);
out_commit:
- mutex_unlock(&sb_dqopt(sb)->dqio_mutex);
+ up_write(&sb_dqopt(sb)->dqio_sem);
ocfs2_commit_trans(OCFS2_SB(sb), handle);
out_drop_lock:
ocfs2_unlock_global_qf(oinfo, 1);
@@ -693,7 +693,7 @@ static int ocfs2_local_read_info(struct super_block *sb, int type)
/* We don't need the lock and we have to acquire quota file locks
* which will later depend on this lock */
- mutex_unlock(&sb_dqopt(sb)->dqio_mutex);
+ up_write(&sb_dqopt(sb)->dqio_sem);
info->dqi_max_spc_limit = 0x7fffffffffffffffLL;
info->dqi_max_ino_limit = 0x7fffffffffffffffLL;
oinfo = kmalloc(sizeof(struct ocfs2_mem_dqinfo), GFP_NOFS);
@@ -772,7 +772,7 @@ static int ocfs2_local_read_info(struct super_block *sb, int type)
goto out_err;
}
- mutex_lock(&sb_dqopt(sb)->dqio_mutex);
+ down_write(&sb_dqopt(sb)->dqio_sem);
return 0;
out_err:
if (oinfo) {
@@ -786,7 +786,7 @@ out_err:
kfree(oinfo);
}
brelse(bh);
- mutex_lock(&sb_dqopt(sb)->dqio_mutex);
+ down_write(&sb_dqopt(sb)->dqio_sem);
return -1;
}