From f98bbe37ae96873ce93f36f4cdc7b47d85cc4455 Mon Sep 17 00:00:00 2001 From: Jan Kara Date: Thu, 17 Aug 2017 19:20:28 +0200 Subject: [PATCH] quota: Propagate ->quota_read errors from v2_read_file_info() Currently we return -EIO on any error (or short read) from ->quota_read() while reading quota info. Propagate the error code instead. Suggested-by: Andreas Dilger Signed-off-by: Jan Kara --- fs/quota/quota_v2.c | 18 +++++++++++------- 1 file changed, 11 insertions(+), 7 deletions(-) diff --git a/fs/quota/quota_v2.c b/fs/quota/quota_v2.c index 21a8bdf7cfec..cdbf71664cdc 100644 --- a/fs/quota/quota_v2.c +++ b/fs/quota/quota_v2.c @@ -65,9 +65,11 @@ static int v2_read_header(struct super_block *sb, int type, if (size != sizeof(struct v2_disk_dqheader)) { quota_error(sb, "Failed header read: expected=%zd got=%zd", sizeof(struct v2_disk_dqheader), size); - return 0; + if (size < 0) + return size; + return -EIO; } - return 1; + return 0; } /* Check whether given file is really vfsv0 quotafile */ @@ -77,7 +79,7 @@ static int v2_check_quota_file(struct super_block *sb, int type) static const uint quota_magics[] = V2_INITQMAGICS; static const uint quota_versions[] = V2_INITQVERSIONS; - if (!v2_read_header(sb, type, &dqhead)) + if (v2_read_header(sb, type, &dqhead)) return 0; if (le32_to_cpu(dqhead.dqh_magic) != quota_magics[type] || le32_to_cpu(dqhead.dqh_version) > quota_versions[type]) @@ -98,10 +100,9 @@ static int v2_read_file_info(struct super_block *sb, int type) int ret; down_read(&dqopt->dqio_sem); - if (!v2_read_header(sb, type, &dqhead)) { - ret = -EIO; + ret = v2_read_header(sb, type, &dqhead); + if (ret < 0) 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)) { @@ -113,7 +114,10 @@ static int v2_read_file_info(struct super_block *sb, int type) sizeof(struct v2_disk_dqinfo), V2_DQINFOOFF); if (size != sizeof(struct v2_disk_dqinfo)) { quota_error(sb, "Can't read info structure"); - ret = -EIO; + if (size < 0) + ret = size; + else + ret = -EIO; goto out; } info->dqi_priv = kmalloc(sizeof(struct qtree_mem_dqinfo), GFP_NOFS); -- 2.20.1