File tune2fs-update-dir-checksums-when-clearing-dir_index.patch of Package e2fsprogs.15537
From 514fde0296c2085fb11685820f3d396d5c41026e Mon Sep 17 00:00:00 2001
From: Jan Kara <jack@suse.cz>
Date: Thu, 13 Feb 2020 11:16:02 +0100
Subject: [PATCH 5/5] tune2fs: update dir checksums when clearing dir_index
feature
References: bsc#1160979
When clearing dir_index feature while metadata_csum is enabled, we have
to rewrite checksums of all indexed directories to update checksums of
internal tree nodes.
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Acked-by: Jan Kara <jack@suse.cz>
---
misc/tune2fs.c | 143 ++++++++++++++++++++++++++++++++++++++-------------------
1 file changed, 95 insertions(+), 48 deletions(-)
Index: e2fsprogs-1.43.8/misc/tune2fs.c
===================================================================
--- e2fsprogs-1.43.8.orig/misc/tune2fs.c
+++ e2fsprogs-1.43.8/misc/tune2fs.c
@@ -553,7 +553,8 @@ struct rewrite_dir_context {
char *buf;
errcode_t errcode;
ext2_ino_t dir;
- int is_htree;
+ int is_htree:1;
+ int clear_htree:1;
};
static int rewrite_dir_block(ext2_filsys fs,
@@ -572,8 +573,13 @@ static int rewrite_dir_block(ext2_filsys
if (ctx->errcode)
return BLOCK_ABORT;
- /* if htree node... */
- if (ctx->is_htree)
+ /*
+ * if htree node... Note that if we are clearing htree structures from
+ * the directory, we treat the htree internal block as an ordinary leaf.
+ * The code below will do the right thing and make space for checksum
+ * there.
+ */
+ if (ctx->is_htree && !ctx->clear_htree)
ext2fs_get_dx_countlimit(fs, (struct ext2_dir_entry *)ctx->buf,
&dcl, &dcl_offset);
if (dcl) {
@@ -702,7 +708,8 @@ static errcode_t rewrite_directory(ext2_
if (retval)
return retval;
- ctx.is_htree = (inode->i_flags & EXT2_INDEX_FL);
+ ctx.is_htree = !!(inode->i_flags & EXT2_INDEX_FL);
+ ctx.clear_htree = !ext2fs_has_feature_dir_index(fs->super);
ctx.dir = dir;
ctx.errcode = 0;
retval = ext2fs_block_iterate3(fs, dir, BLOCK_FLAG_READ_ONLY |
@@ -713,121 +720,169 @@ static errcode_t rewrite_directory(ext2_
if (retval)
return retval;
+ if (ctx.is_htree && ctx.clear_htree) {
+ inode->i_flags &= ~EXT2_INDEX_FL;
+ retval = ext2fs_write_inode(fs, dir, inode);
+ if (retval)
+ return retval;
+ }
+
return ctx.errcode;
}
-/*
- * Forcibly set checksums in all inodes.
- */
-static void rewrite_inodes(ext2_filsys fs)
+struct rewrite_context {
+ ext2_filsys fs;
+ struct ext2_inode *zero_inode;
+ char *ea_buf;
+ int inode_size;
+};
+
+static void rewrite_one_inode(struct rewrite_context *ctx, ext2_ino_t ino,
+ struct ext2_inode *inode)
{
- int length = EXT2_INODE_SIZE(fs->super);
- struct ext2_inode *inode, *zero;
- char *ea_buf;
- ext2_inode_scan scan;
- errcode_t retval;
- ext2_ino_t ino;
- blk64_t file_acl_block;
- int inode_dirty;
+ ext2_filsys fs = ctx->fs;
+ int inode_dirty;
+ errcode_t retval;
+ blk64_t file_acl_block;
- if (fs->super->s_creator_os == EXT2_OS_HURD)
- return;
+ if (ext2fs_test_inode_bitmap2(fs->inode_map, ino)) {
+ inode_dirty = 1;
+ } else {
+ if (memcmp(inode, ctx->zero_inode, ctx->inode_size) != 0) {
+ memset(inode, 0, ctx->inode_size);
+ inode_dirty = 1;
+ } else {
+ inode_dirty = 0;
+ }
+ }
- retval = ext2fs_open_inode_scan(fs, 0, &scan);
+ if (inode_dirty) {
+ retval = ext2fs_write_inode_full(fs, ino, inode,
+ ctx->inode_size);
+ if (retval) {
+ com_err("set_csum", retval, "while writing "
+ "inode");
+ exit(1);
+ }
+ }
+
+ retval = rewrite_extents(fs, ino, inode);
if (retval) {
- com_err("set_csum", retval, "while opening inode scan");
+ com_err("rewrite_extents", retval,
+ "while rewriting extents");
exit(1);
}
- retval = ext2fs_get_mem(length, &inode);
+ if (LINUX_S_ISDIR(inode->i_mode) &&
+ ext2fs_inode_has_valid_blocks2(fs, inode)) {
+ retval = rewrite_directory(fs, ino, inode);
+ if (retval) {
+ com_err("rewrite_directory", retval,
+ "while rewriting directories");
+ exit(1);
+ }
+ }
+
+ file_acl_block = ext2fs_file_acl_block(fs, inode);
+ if (!file_acl_block)
+ return;
+ retval = ext2fs_read_ext_attr3(fs, file_acl_block, ctx->ea_buf, ino);
if (retval) {
- com_err("set_csum", retval, "while allocating memory");
+ com_err("rewrite_eablock", retval,
+ "while rewriting extended attribute");
+ exit(1);
+ }
+ retval = ext2fs_write_ext_attr3(fs, file_acl_block, ctx->ea_buf,
+ ino);
+ if (retval) {
+ com_err("rewrite_eablock", retval,
+ "while rewriting extended attribute");
exit(1);
}
+}
+
+#define REWRITE_DIR_FL 0x02 /* Rewrite directories */
+#define REWRITE_NONDIR_FL 0x04 /* Rewrite other inodes */
+#define REWRITE_ALL (REWRITE_DIR_FL | REWRITE_NONDIR_FL)
+
+static void rewrite_inodes_pass(struct rewrite_context *ctx, unsigned int flags)
+{
+ ext2_filsys fs = ctx->fs;
+ struct ext2_inode *inode;
+ ext2_inode_scan scan;
+ errcode_t retval;
+ ext2_ino_t ino;
+ int rewrite;
- retval = ext2fs_get_memzero(length, &zero);
+ if (fs->super->s_creator_os == EXT2_OS_HURD)
+ return;
+
+ retval = ext2fs_open_inode_scan(fs, 0, &scan);
if (retval) {
- com_err("set_csum", retval, "while allocating memory");
+ com_err("set_csum", retval, "while opening inode scan");
exit(1);
}
- retval = ext2fs_get_mem(fs->blocksize, &ea_buf);
+ retval = ext2fs_get_mem(ctx->inode_size, &inode);
if (retval) {
com_err("set_csum", retval, "while allocating memory");
exit(1);
}
do {
- retval = ext2fs_get_next_inode_full(scan, &ino, inode, length);
+ retval = ext2fs_get_next_inode_full(scan, &ino, inode, ctx->inode_size);
if (retval) {
com_err("set_csum", retval, "while getting next inode");
exit(1);
}
if (!ino)
break;
- if (ext2fs_test_inode_bitmap2(fs->inode_map, ino)) {
- inode_dirty = 1;
+ rewrite = 0;
+ if (LINUX_S_ISDIR(inode->i_mode)) {
+ if (flags & REWRITE_DIR_FL)
+ rewrite = 1;
} else {
- if (memcmp(inode, zero, length) != 0) {
- memset(inode, 0, length);
- inode_dirty = 1;
- } else {
- inode_dirty = 0;
- }
+ if (flags & REWRITE_NONDIR_FL)
+ rewrite = 1;
}
+ if (rewrite)
+ rewrite_one_inode(ctx, ino, inode);
+ } while (ino);
- if (inode_dirty) {
- retval = ext2fs_write_inode_full(fs, ino, inode,
- length);
- if (retval) {
- com_err("set_csum", retval, "while writing "
- "inode");
- exit(1);
- }
- }
+ ext2fs_free_mem(&inode);
+ ext2fs_close_inode_scan(scan);
+}
- retval = rewrite_extents(fs, ino, inode);
- if (retval) {
- com_err("rewrite_extents", retval,
- "while rewriting extents");
- exit(1);
- }
+/*
+ * Forcibly rewrite checksums in inodes specified by 'flags'
+ */
+static void rewrite_inodes(ext2_filsys fs, unsigned int flags)
+{
+ struct rewrite_context ctx = {
+ .fs = fs,
+ .inode_size = EXT2_INODE_SIZE(fs->super),
+ };
+ errcode_t retval;
- if (LINUX_S_ISDIR(inode->i_mode) &&
- ext2fs_inode_has_valid_blocks2(fs, inode)) {
- retval = rewrite_directory(fs, ino, inode);
- if (retval) {
- com_err("rewrite_directory", retval,
- "while rewriting directories");
- exit(1);
- }
- }
+ retval = ext2fs_get_memzero(ctx.inode_size, &ctx.zero_inode);
+ if (retval) {
+ com_err("set_csum", retval, "while allocating memory");
+ exit(1);
+ }
- file_acl_block = ext2fs_file_acl_block(fs, inode);
- if (!file_acl_block)
- continue;
- retval = ext2fs_read_ext_attr3(fs, file_acl_block, ea_buf, ino);
- if (retval) {
- com_err("rewrite_eablock", retval,
- "while rewriting extended attribute");
- exit(1);
- }
- retval = ext2fs_write_ext_attr3(fs, file_acl_block, ea_buf,
- ino);
- if (retval) {
- com_err("rewrite_eablock", retval,
- "while rewriting extended attribute");
- exit(1);
- }
- } while (ino);
+ retval = ext2fs_get_mem(fs->blocksize, &ctx.ea_buf);
+ if (retval) {
+ com_err("set_csum", retval, "while allocating memory");
+ exit(1);
+ }
- ext2fs_free_mem(&zero);
- ext2fs_free_mem(&inode);
- ext2fs_free_mem(&ea_buf);
- ext2fs_close_inode_scan(scan);
+ rewrite_inodes_pass(&ctx, flags);
+
+ ext2fs_free_mem(&ctx.zero_inode);
+ ext2fs_free_mem(&ctx.ea_buf);
}
-static void rewrite_metadata_checksums(ext2_filsys fs)
+static void rewrite_metadata_checksums(ext2_filsys fs, unsigned int flags)
{
errcode_t retval;
dgrp_t i;
@@ -842,7 +897,7 @@ static void rewrite_metadata_checksums(e
"while reading bitmaps");
exit(1);
}
- rewrite_inodes(fs);
+ rewrite_inodes(fs, flags);
ext2fs_mark_ib_dirty(fs);
ext2fs_mark_bb_dirty(fs);
ext2fs_mmp_update2(fs, 1);
@@ -1141,6 +1196,23 @@ mmp_error:
uuid_generate((unsigned char *) sb->s_hash_seed);
}
+ if (FEATURE_OFF(E2P_FEATURE_COMPAT, EXT2_FEATURE_COMPAT_DIR_INDEX) &&
+ ext2fs_has_feature_metadata_csum(sb)) {
+ check_fsck_needed(fs,
+ _("Disabling directory index on filesystem with "
+ "checksums could take some time."));
+ if (mount_flags & EXT2_MF_MOUNTED) {
+ fputs(_("Cannot disable dir_index on a mounted "
+ "filesystem!\n"), stderr);
+ exit(1);
+ }
+ /*
+ * Clearing dir_index on checksummed filesystem requires
+ * rewriting all directories to update checksums.
+ */
+ rewrite_checksums |= REWRITE_DIR_FL;
+ }
+
if (FEATURE_OFF(E2P_FEATURE_INCOMPAT, EXT4_FEATURE_INCOMPAT_FLEX_BG)) {
if (ext2fs_check_desc(fs)) {
fputs(_("Clearing the flex_bg flag would "
@@ -1184,7 +1256,7 @@ mmp_error:
"The larger fields afforded by this feature "
"enable full-strength checksumming. "
"Run resize2fs -b to rectify.\n"));
- rewrite_checksums = 1;
+ rewrite_checksums = REWRITE_ALL;
/* metadata_csum supersedes uninit_bg */
ext2fs_clear_feature_gdt_csum(fs->super);
@@ -1212,7 +1284,7 @@ mmp_error:
"filesystem!\n"), stderr);
exit(1);
}
- rewrite_checksums = 1;
+ rewrite_checksums = REWRITE_ALL;
/* Enable uninit_bg unless the user expressly turned it off */
memcpy(test_features, old_features, sizeof(test_features));
@@ -1375,7 +1447,7 @@ mmp_error:
return 1;
}
- rewrite_checksums = 1;
+ rewrite_checksums = REWRITE_ALL;
}
if (sb->s_rev_level == EXT2_GOOD_OLD_REV &&
@@ -3148,7 +3220,7 @@ retry_open:
ext2fs_mark_super_dirty(fs);
if (ext2fs_has_feature_metadata_csum(fs->super) &&
!ext2fs_has_feature_csum_seed(fs->super))
- rewrite_checksums = 1;
+ rewrite_checksums = REWRITE_ALL;
}
if (I_flag) {
@@ -3180,7 +3252,7 @@ retry_open:
if (retval == 0) {
printf(_("Setting inode size %lu\n"),
new_inode_size);
- rewrite_checksums = 1;
+ rewrite_checksums = REWRITE_ALL;
} else {
printf("%s", _("Failed to change inode size\n"));
rc = 1;
@@ -3189,7 +3261,7 @@ retry_open:
}
if (rewrite_checksums)
- rewrite_metadata_checksums(fs);
+ rewrite_metadata_checksums(fs, rewrite_checksums);
if (l_flag)
list_super(sb);
