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Message-Id: <20210825221143.30705-2-jack@suse.cz>
Date: Thu, 26 Aug 2021 00:11:31 +0200
From: Jan Kara <jack@...e.cz>
To: Ted Tso <tytso@....edu>
Cc: <linux-ext4@...r.kernel.org>, Jan Kara <jack@...e.cz>
Subject: [PATCH 2/5] mke2fs: Add support for orphan_file feature
Signed-off-by: Jan Kara <jack@...e.cz>
---
misc/mke2fs.8.in | 5 +++++
misc/mke2fs.c | 53 +++++++++++++++++++++++++++++++++++++++++++++---
2 files changed, 55 insertions(+), 3 deletions(-)
diff --git a/misc/mke2fs.8.in b/misc/mke2fs.8.in
index c0b5324569a1..b378e4d7c5e1 100644
--- a/misc/mke2fs.8.in
+++ b/misc/mke2fs.8.in
@@ -403,6 +403,11 @@ file system to change based on the user running \fBmke2fs\fR.
Set a flag in the file system superblock indicating that it may be
mounted using experimental kernel code, such as the ext4dev file system.
.TP
+.BI orphan_file_size= size
+Set size of the file for tracking unlinked but still open inodes and inodes
+with truncate in progress. Larger file allows for better scalability, reserving
+a few blocks per cpu is ideal.
+.TP
.B discard
Attempt to discard blocks at mkfs time (discarding blocks initially is useful
on solid state devices and sparse / thin-provisioned storage). When the device
diff --git a/misc/mke2fs.c b/misc/mke2fs.c
index 04b2fbce638a..c955b318e960 100644
--- a/misc/mke2fs.c
+++ b/misc/mke2fs.c
@@ -94,6 +94,7 @@ static gid_t root_gid;
int journal_size;
int journal_flags;
int journal_fc_size;
+static e2_blkcnt_t orphan_file_blocks;
static int lazy_itable_init;
static int packed_meta_blocks;
int no_copy_xattrs;
@@ -1089,6 +1090,21 @@ static void parse_extended_opts(struct ext2_super_block *param,
continue;
}
encoding_flags = arg;
+ } else if (!strcmp(token, "orphan_file_size")) {
+ if (!arg) {
+ r_usage++;
+ badopt = token;
+ continue;
+ }
+ orphan_file_blocks = parse_num_blocks2(arg,
+ fs_param.s_log_block_size);
+ if (orphan_file_blocks == 0) {
+ fprintf(stderr,
+ _("Invalid size of orphan file %s\n"),
+ arg);
+ r_usage++;
+ continue;
+ }
} else {
r_usage++;
badopt = token;
@@ -1156,7 +1172,8 @@ static __u32 ok_features[3] = {
EXT2_FEATURE_COMPAT_EXT_ATTR |
EXT4_FEATURE_COMPAT_SPARSE_SUPER2 |
EXT4_FEATURE_COMPAT_FAST_COMMIT |
- EXT4_FEATURE_COMPAT_STABLE_INODES,
+ EXT4_FEATURE_COMPAT_STABLE_INODES |
+ EXT4_FEATURE_COMPAT_ORPHAN_FILE,
/* Incompat */
EXT2_FEATURE_INCOMPAT_FILETYPE|
EXT3_FEATURE_INCOMPAT_EXTENTS|
@@ -1551,6 +1568,7 @@ static void PRS(int argc, char *argv[])
int lsector_size = 0, psector_size = 0;
int show_version_only = 0, is_device = 0;
unsigned long long num_inodes = 0; /* unsigned long long to catch too-large input */
+ int default_orphan_file = 0;
errcode_t retval;
char * oldpath = getenv("PATH");
char * extended_opts = 0;
@@ -2101,8 +2119,20 @@ profile_error:
ext2fs_clear_feature_ea_inode(&fs_param);
ext2fs_clear_feature_casefold(&fs_param);
}
- edit_feature(fs_features ? fs_features : tmp,
- &fs_param.s_feature_compat);
+ if (!fs_features && tmp)
+ edit_feature(tmp, &fs_param.s_feature_compat);
+ /*
+ * Now all the defaults are incorporated in fs_param. Check the state
+ * of orphan_file feature so that we know whether we should silently
+ * disabled in case journal gets disabled.
+ */
+ if (ext2fs_has_feature_orphan_file(&fs_param))
+ default_orphan_file = 1;
+ if (fs_features)
+ edit_feature(fs_features, &fs_param.s_feature_compat);
+ /* Silently disable orphan_file if user chose fs without journal */
+ if (default_orphan_file && !ext2fs_has_feature_journal(&fs_param))
+ ext2fs_clear_feature_orphan_file(&fs_param);
if (tmp)
free(tmp);
(void) ext2fs_free_mem(&fs_features);
@@ -3471,6 +3501,23 @@ no_journal:
fix_cluster_bg_counts(fs);
if (ext2fs_has_feature_quota(&fs_param))
create_quota_inodes(fs);
+ if (ext2fs_has_feature_orphan_file(&fs_param)) {
+ if (!ext2fs_has_feature_journal(&fs_param)) {
+ com_err(program_name, 0, _("cannot set orphan_file "
+ "feature without a journal."));
+ exit(1);
+ }
+ if (!orphan_file_blocks) {
+ orphan_file_blocks =
+ ext2fs_default_orphan_file_blocks(fs);
+ }
+ retval = ext2fs_create_orphan_file(fs, orphan_file_blocks);
+ if (retval) {
+ com_err(program_name, retval,
+ _("while creating orphan file"));
+ exit(1);
+ }
+ }
retval = mk_hugefiles(fs, device_name);
if (retval)
--
2.26.2
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