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authorJan Kara <jack@suse.cz>2017-06-09 09:59:46 +0300
committerJan Kara <jack@suse.cz>2017-08-17 20:16:24 +0300
commit42fdb8583d5a7eaf916c7323fce6cb4728f364c4 (patch)
treeab56d2a8a3735eb3e94c35cf834050ab54851e4b /fs/quota/quota_v2.c
parent9a8ae30e73cb8827dd0a8ae5fd505db457cfb7ed (diff)
downloadlinux-42fdb8583d5a7eaf916c7323fce6cb4728f364c4.tar.xz
quota: Push dqio_sem down to ->read_file_info()
Push down acquisition of dqio_sem into ->read_file_info() callback. This is for consistency with other operations and it also allows us to get rid of an ugliness in OCFS2. Reviewed-by: Andreas Dilger <adilger@dilger.ca> Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs/quota/quota_v2.c')
-rw-r--r--fs/quota/quota_v2.c28
1 files changed, 20 insertions, 8 deletions
diff --git a/fs/quota/quota_v2.c b/fs/quota/quota_v2.c
index 5e47012d2f57..373d7cfea5b0 100644
--- a/fs/quota/quota_v2.c
+++ b/fs/quota/quota_v2.c
@@ -90,29 +90,38 @@ static int v2_read_file_info(struct super_block *sb, int type)
{
struct v2_disk_dqinfo dinfo;
struct v2_disk_dqheader dqhead;
- struct mem_dqinfo *info = sb_dqinfo(sb, type);
+ struct quota_info *dqopt = sb_dqopt(sb);
+ struct mem_dqinfo *info = &dqopt->info[type];
struct qtree_mem_dqinfo *qinfo;
ssize_t size;
unsigned int version;
+ int ret;
- if (!v2_read_header(sb, type, &dqhead))
- return -1;
+ down_read(&dqopt->dqio_sem);
+ if (!v2_read_header(sb, type, &dqhead)) {
+ ret = -1;
+ goto out;
+ }
version = le32_to_cpu(dqhead.dqh_version);
if ((info->dqi_fmt_id == QFMT_VFS_V0 && version != 0) ||
- (info->dqi_fmt_id == QFMT_VFS_V1 && version != 1))
- return -1;
+ (info->dqi_fmt_id == QFMT_VFS_V1 && version != 1)) {
+ ret = -1;
+ goto out;
+ }
size = sb->s_op->quota_read(sb, type, (char *)&dinfo,
sizeof(struct v2_disk_dqinfo), V2_DQINFOOFF);
if (size != sizeof(struct v2_disk_dqinfo)) {
quota_error(sb, "Can't read info structure");
- return -1;
+ ret = -1;
+ goto out;
}
info->dqi_priv = kmalloc(sizeof(struct qtree_mem_dqinfo), GFP_NOFS);
if (!info->dqi_priv) {
printk(KERN_WARNING
"Not enough memory for quota information structure.\n");
- return -ENOMEM;
+ ret = -ENOMEM;
+ goto out;
}
qinfo = info->dqi_priv;
if (version == 0) {
@@ -147,7 +156,10 @@ static int v2_read_file_info(struct super_block *sb, int type)
qinfo->dqi_entry_size = sizeof(struct v2r1_disk_dqblk);
qinfo->dqi_ops = &v2r1_qtree_ops;
}
- return 0;
+ ret = 0;
+out:
+ up_read(&dqopt->dqio_sem);
+ return ret;
}
/* Write information header to quota file */