diff options
Diffstat (limited to 'fs/overlayfs/super.c')
| -rw-r--r-- | fs/overlayfs/super.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c index 290983bcfbb3..4717244e7d7a 100644 --- a/fs/overlayfs/super.c +++ b/fs/overlayfs/super.c @@ -356,6 +356,8 @@ static int ovl_show_options(struct seq_file *m, struct dentry *dentry) seq_printf(m, ",redirect_dir=%s", ofs->config.redirect_mode); if (ofs->config.index != ovl_index_def) seq_printf(m, ",index=%s", ofs->config.index ? "on" : "off"); + if (!ofs->config.uuid) + seq_puts(m, ",uuid=off"); if (ofs->config.nfs_export != ovl_nfs_export_def) seq_printf(m, ",nfs_export=%s", ofs->config.nfs_export ? "on" : "off"); @@ -410,6 +412,8 @@ enum { OPT_REDIRECT_DIR, OPT_INDEX_ON, OPT_INDEX_OFF, + OPT_UUID_ON, + OPT_UUID_OFF, OPT_NFS_EXPORT_ON, OPT_NFS_EXPORT_OFF, OPT_XINO_ON, @@ -429,6 +433,8 @@ static const match_table_t ovl_tokens = { {OPT_REDIRECT_DIR, "redirect_dir=%s"}, {OPT_INDEX_ON, "index=on"}, {OPT_INDEX_OFF, "index=off"}, + {OPT_UUID_ON, "uuid=on"}, + {OPT_UUID_OFF, "uuid=off"}, {OPT_NFS_EXPORT_ON, "nfs_export=on"}, {OPT_NFS_EXPORT_OFF, "nfs_export=off"}, {OPT_XINO_ON, "xino=on"}, @@ -549,6 +555,14 @@ static int ovl_parse_opt(char *opt, struct ovl_config *config) index_opt = true; break; + case OPT_UUID_ON: + config->uuid = true; + break; + + case OPT_UUID_OFF: + config->uuid = false; + break; + case OPT_NFS_EXPORT_ON: config->nfs_export = true; nfs_export_opt = true; @@ -1877,6 +1891,7 @@ static int ovl_fill_super(struct super_block *sb, void *data, int silent) ofs->share_whiteout = true; ofs->config.index = ovl_index_def; + ofs->config.uuid = true; ofs->config.nfs_export = ovl_nfs_export_def; ofs->config.xino = ovl_xino_def(); ofs->config.metacopy = ovl_metacopy_def; @@ -1956,6 +1971,11 @@ static int ovl_fill_super(struct super_block *sb, void *data, int silent) if (!ovl_upper_mnt(ofs)) sb->s_flags |= SB_RDONLY; + if (!ofs->config.uuid && ofs->numfs > 1) { + pr_warn("The uuid=off requires a single fs for lower and upper, falling back to uuid=on.\n"); + ofs->config.uuid = true; + } + if (!ovl_force_readonly(ofs) && ofs->config.index) { err = ovl_get_indexdir(sb, ofs, oe, &upperpath); if (err) |