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Date: Fri, 22 May 2015 13:28:56 +0200
From: Jan Kara <jack@...e.cz>
To: linux-ext4@...r.kernel.org
Cc: Jan Kara <jack@...e.cz>
Subject: [PATCH 3/4] e2fsck: Add support for handling orphan file
Signed-off-by: Jan Kara <jack@...e.cz>
---
e2fsck/pass1.c | 27 ++++++
e2fsck/problem.c | 55 +++++++++++
e2fsck/problem.h | 36 +++++++
e2fsck/super.c | 288 ++++++++++++++++++++++++++++++++++++++++++++++++-------
e2fsck/unix.c | 60 ++++++++++++
5 files changed, 429 insertions(+), 37 deletions(-)
diff --git a/e2fsck/pass1.c b/e2fsck/pass1.c
index b007f6522ee3..207778113846 100644
--- a/e2fsck/pass1.c
+++ b/e2fsck/pass1.c
@@ -1466,6 +1466,33 @@ void e2fsck_pass1(e2fsck_t ctx)
inode_size, "pass1");
failed_csum = 0;
}
+ } else if (ino == EXT4_ORPHAN_INO) {
+ ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
+ if (fs->super->s_feature_compat &
+ EXT4_FEATURE_COMPAT_ORPHAN_FILE) {
+ if (!LINUX_S_ISREG(inode->i_mode) &&
+ fix_problem(ctx, PR_1_ORPHAN_FILE_BAD_MODE,
+ &pctx)) {
+ inode->i_mode = LINUX_S_IFREG;
+ e2fsck_write_inode(ctx, ino, inode,
+ "pass1");
+ failed_csum = 0;
+ }
+ check_blocks(ctx, &pctx, block_buf);
+ FINISH_INODE_LOOP(ctx, ino, &pctx, failed_csum);
+ continue;
+ }
+ if ((inode->i_links_count ||
+ inode->i_blocks || inode->i_block[0]) &&
+ fix_problem(ctx, PR_1_ORPHAN_FILE_NOT_CLEAR,
+ &pctx)) {
+ memset(inode, 0, inode_size);
+ ext2fs_icount_store(ctx->inode_link_info, ino,
+ 0);
+ e2fsck_write_inode_full(ctx, ino, inode,
+ inode_size, "pass1");
+ failed_csum = 0;
+ }
} else if (ino < EXT2_FIRST_INODE(fs->super)) {
problem_t problem = 0;
diff --git a/e2fsck/problem.c b/e2fsck/problem.c
index 62fce25d97f9..15813deeeafa 100644
--- a/e2fsck/problem.c
+++ b/e2fsck/problem.c
@@ -464,6 +464,26 @@ static struct e2fsck_problem problem_table[] = {
N_("External @j @S checksum does not match @S. "),
PROMPT_FIX, PR_PREEN_OK },
+ /* Orphan file contains holes */
+ { PR_0_ORPHAN_FILE_HOLE,
+ N_("Orphan file (@i %i) contains hole.\n"),
+ PROMPT_NONE, 0 },
+
+ /* Orphan file block has wrong magic */
+ { PR_0_ORPHAN_FILE_BAD_MAGIC,
+ N_("Orphan file (@i %i) block %B contains wrong magic.\n"),
+ PROMPT_NONE, 0 },
+
+ /* Orphan file block has wrong magic */
+ { PR_0_ORPHAN_FILE_BAD_CHECKSUM,
+ N_("Orphan file (@i %i) block %B contains wrong checksum.\n"),
+ PROMPT_NONE, 0 },
+
+ /* orphan_present set without orphan_file set */
+ { PR_0_ORPHAN_PRESENT_WITHOUT_FILE,
+ N_("@S orphan_present flag set without orphan_file flag.\n"),
+ PROMPT_NONE, 0 },
+
/* Pass 1 errors */
/* Pass 1: Checking inodes, blocks, and sizes */
@@ -1101,6 +1121,16 @@ static struct e2fsck_problem problem_table[] = {
N_("@A memory for encrypted @d list\n"),
PROMPT_NONE, PR_FATAL },
+ /* Orphan file has bad mode */
+ { PR_1_ORPHAN_FILE_BAD_MODE,
+ N_("Orphan file @i %i is not regular file. "),
+ PROMPT_CLEAR, PR_PREEN_OK },
+
+ /* Orphan file inode is not in use, but contains data */
+ { PR_1_ORPHAN_FILE_NOT_CLEAR,
+ N_("Orphan file @i %i is not in use, but contains data. "),
+ PROMPT_CLEAR, PR_PREEN_OK },
+
/* Pass 1b errors */
/* Pass 1B: Rescan for duplicate/bad blocks */
@@ -1926,6 +1956,31 @@ static struct e2fsck_problem problem_table[] = {
N_("Error flushing writes to storage device: %m\n"),
PROMPT_NULL, PR_FATAL },
+ /* Orphan file without a journal */
+ { PR_6_ORPHAN_FILE_WITHOUT_JOURNAL,
+ N_("@S has orphan file without a journal.\n"),
+ PROMPT_CLEAR, PR_PREEN_OK },
+
+ /* Orphan file truncation failed */
+ { PR_6_ORPHAN_FILE_TRUNC_FAILED,
+ N_("Failed to truncate orphan file.\n"),
+ PROMPT_NONE, 0 },
+
+ /* Failed to initialize orphan file */
+ { PR_6_ORPHAN_FILE_CORRUPTED,
+ N_("Failed to initialize orphan file.\n"),
+ PROMPT_RECREATE, PR_PREEN_OK },
+
+ /* Cannot fix corrupted orphan file with invalid bitmaps */
+ { PR_6_ORPHAN_FILE_BITMAP_INVALID,
+ N_("Cannot fix corrupted orphan file with invalid bitmaps.\n"),
+ PROMPT_NONE, 0 },
+
+ /* Orphan file creation failed */
+ { PR_6_ORPHAN_FILE_CREATE_FAILED,
+ N_("Failed to truncate orphan file.\n"),
+ PROMPT_NONE, 0 },
+
{ 0 }
};
diff --git a/e2fsck/problem.h b/e2fsck/problem.h
index bc959c483199..3f9cae9cc261 100644
--- a/e2fsck/problem.h
+++ b/e2fsck/problem.h
@@ -249,6 +249,18 @@ struct problem_context {
/* Checking group descriptor failed */
#define PR_0_CHECK_DESC_FAILED 0x000045
+/* Orphan file contains holes */
+#define PR_0_ORPHAN_FILE_HOLE 0x000046
+
+/* Orphan file block has wrong magic */
+#define PR_0_ORPHAN_FILE_BAD_MAGIC 0x000047
+
+/* Orphan file block has wrong checksum */
+#define PR_0_ORPHAN_FILE_BAD_CHECKSUM 0x000048
+
+/* orphan_present set without orphan_file set */
+#define PR_0_ORPHAN_PRESENT_WITHOUT_FILE 0x000049
+
/*
* metadata_csum supersedes uninit_bg; both feature bits cannot be set
* simultaneously.
@@ -644,6 +656,15 @@ struct problem_context {
/* Error allocating memory for encrypted directory list */
#define PR_1_ALLOCATE_ENCRYPTED_DIRLIST 0x01007E
+/* Orphan file inode is not a regular file */
+#define PR_1_ORPHAN_FILE_BAD_MODE 0x01007F
+
+/* Orphan file inode is not in use, but contains data */
+#define PR_1_ORPHAN_FILE_NOT_CLEAR 0x010080
+
+/* Orphan file inode is not clear */
+#define PR_1_ORPHAN_INODE_NOT_CLEAR 0x01007F
+
/*
* Pass 1b errors
*/
@@ -1161,6 +1182,21 @@ struct problem_context {
/* Error flushing writes to storage device */
#define PR_6_IO_FLUSH 0x060005
+/* Orphan file without a journal */
+#define PR_6_ORPHAN_FILE_WITHOUT_JOURNAL 0x060006
+
+/* Orphan file truncation failed */
+#define PR_6_ORPHAN_FILE_TRUNC_FAILED 0x060007
+
+/* Failed to initialize orphan file */
+#define PR_6_ORPHAN_FILE_CORRUPTED 0x060008
+
+/* Cannot fix corrupted orphan file with invalid bitmaps */
+#define PR_6_ORPHAN_FILE_BITMAP_INVALID 0x060009
+
+/* Orphan file creation failed */
+#define PR_6_ORPHAN_FILE_CREATE_FAILED 0x06000A
+
/*
* Function declarations
*/
diff --git a/e2fsck/super.c b/e2fsck/super.c
index 9eebd4da4aa6..95841329b5bf 100644
--- a/e2fsck/super.c
+++ b/e2fsck/super.c
@@ -224,6 +224,153 @@ static int release_inode_blocks(e2fsck_t ctx, ext2_ino_t ino,
return 0;
}
+static int release_orphan_inode(e2fsck_t ctx, ext2_ino_t *ino, char *block_buf)
+{
+ ext2_filsys fs = ctx->fs;
+ struct problem_context pctx;
+ struct ext2_inode inode;
+ ext2_ino_t next_ino;
+
+ e2fsck_read_inode(ctx, *ino, &inode, "release_orphan_inode");
+ clear_problem_context(&pctx);
+ pctx.ino = *ino;
+ pctx.inode = &inode;
+ pctx.str = inode.i_links_count ? _("Truncating") : _("Clearing");
+
+ fix_problem(ctx, PR_0_ORPHAN_CLEAR_INODE, &pctx);
+
+ next_ino = inode.i_dtime;
+ if (next_ino &&
+ ((next_ino < EXT2_FIRST_INODE(fs->super)) ||
+ (next_ino > fs->super->s_inodes_count))) {
+ pctx.ino = next_ino;
+ fix_problem(ctx, PR_0_ORPHAN_ILLEGAL_INODE, &pctx);
+ return 1;
+ }
+ if (release_inode_blocks(ctx, *ino, &inode, block_buf, &pctx))
+ return 1;
+
+ if (!inode.i_links_count) {
+ ext2fs_inode_alloc_stats2(fs, *ino, -1,
+ LINUX_S_ISDIR(inode.i_mode));
+ ctx->free_inodes++;
+ inode.i_dtime = ctx->now;
+ } else {
+ inode.i_dtime = 0;
+ }
+ e2fsck_write_inode(ctx, *ino, &inode, "delete_file");
+ *ino = next_ino;
+
+ return 0;
+}
+
+struct process_orphan_block_data {
+ e2fsck_t ctx;
+ char *buf;
+ char *block_buf;
+ int abort;
+ errcode_t errcode;
+};
+
+static int process_orphan_block(ext2_filsys fs,
+ blk64_t *block_nr,
+ e2_blkcnt_t blockcnt,
+ blk64_t ref_blk EXT2FS_ATTR((unused)),
+ int ref_offset EXT2FS_ATTR((unused)),
+ void *priv_data)
+{
+ struct process_orphan_block_data *pd;
+ e2fsck_t ctx;
+ struct problem_context pctx;
+ blk64_t blk = *block_nr;
+ e2_blkcnt_t i;
+ struct ext4_orphan_block_tail *tail;
+ int j;
+ int inodes_per_ob;
+ __u32 *bdata;
+ ext2_ino_t ino;
+
+ pd = priv_data;
+ ctx = pd->ctx;
+ clear_problem_context(&pctx);
+ pctx.ino = EXT4_ORPHAN_INO;
+
+ /* Orphan file must not have holes */
+ if (!blk) {
+ fix_problem(ctx, PR_0_ORPHAN_FILE_HOLE, &pctx);
+return_abort:
+ pd->abort = 1;
+ return BLOCK_ABORT;
+ }
+ inodes_per_ob = ext2fs_inodes_per_orphan_block(fs);
+ for (i = 0; i < blockcnt; i++) {
+ pctx.blk = blk + i;
+ pd->errcode = io_channel_read_blk64(fs->io, blk + i, 1, pd->buf);
+ if (pd->errcode)
+ goto return_abort;
+ tail = ext2fs_orphan_block_tail(fs, pd->buf);
+ if (ext2fs_le32_to_cpu(tail->ob_magic) !=
+ EXT4_ORPHAN_BLOCK_MAGIC) {
+ fix_problem(ctx, PR_0_ORPHAN_FILE_BAD_MAGIC, &pctx);
+ goto return_abort;
+ }
+ if (!ext2fs_orphan_file_block_csum_verify(fs, pd->buf)) {
+ fix_problem(ctx, PR_0_ORPHAN_FILE_BAD_CHECKSUM, &pctx);
+ goto return_abort;
+ }
+ bdata = (__u32 *)pd->buf;
+ for (j = 0; j < inodes_per_ob; j++) {
+ if (!bdata[j])
+ continue;
+ ino = ext2fs_le32_to_cpu(bdata[j]);
+ if (release_orphan_inode(ctx, &ino, pd->block_buf))
+ goto return_abort;
+ }
+ }
+ return 0;
+}
+
+static int process_orphan_file(e2fsck_t ctx, char *block_buf)
+{
+ ext2_filsys fs = ctx->fs;
+ char *orphan_buf;
+ struct process_orphan_block_data pd;
+ int ret = 0;
+ errcode_t retval;
+
+ if (!(fs->super->s_feature_compat & EXT4_FEATURE_COMPAT_ORPHAN_FILE))
+ return 0;
+
+ orphan_buf = (char *) e2fsck_allocate_memory(ctx, fs->blocksize * 4,
+ "orphan block buffer");
+ pd.buf = orphan_buf + 3 * fs->blocksize;
+ pd.block_buf = block_buf;
+ pd.ctx = ctx;
+ pd.abort = 0;
+ pd.errcode = 0;
+ retval = ext2fs_block_iterate3(fs, EXT4_ORPHAN_INO,
+ BLOCK_FLAG_DATA_ONLY | BLOCK_FLAG_HOLE,
+ orphan_buf, process_orphan_block, &pd);
+ if (retval) {
+ com_err("process_orphan_block", retval,
+ _("while calling ext2fs_block_iterate for inode %d"),
+ EXT4_ORPHAN_INO);
+ ret = 1;
+ goto out;
+ }
+ if (pd.abort) {
+ if (pd.errcode) {
+ com_err("process_orphan_block", pd.errcode,
+ _("while reading blocks of inode %d"),
+ EXT4_ORPHAN_INO);
+ }
+ ret = 1;
+ }
+out:
+ ext2fs_free_mem(&orphan_buf);
+ return 0;
+}
+
/*
* This function releases all of the orphan inodes. It returns 1 if
* it hit some error, and 0 on success.
@@ -231,14 +378,16 @@ static int release_inode_blocks(e2fsck_t ctx, ext2_ino_t ino,
static int release_orphan_inodes(e2fsck_t ctx)
{
ext2_filsys fs = ctx->fs;
- ext2_ino_t ino, next_ino;
- struct ext2_inode inode;
+ ext2_ino_t ino;
struct problem_context pctx;
char *block_buf;
- if ((ino = fs->super->s_last_orphan) == 0)
+ if (fs->super->s_last_orphan == 0 &&
+ !(fs->super->s_feature_ro_compat &
+ EXT4_FEATURE_RO_COMPAT_ORPHAN_PRESENT))
return 0;
+ ino = fs->super->s_last_orphan;
/*
* Win or lose, we won't be using the head of the orphan inode
* list again.
@@ -247,15 +396,16 @@ static int release_orphan_inodes(e2fsck_t ctx)
ext2fs_mark_super_dirty(fs);
/*
- * If the filesystem contains errors, don't run the orphan
- * list, since the orphan list can't be trusted; and we're
- * going to be running a full e2fsck run anyway...
+ * If the filesystem contains errors, don't process the orphan list
+ * or orphan file, since neither can be trusted; and we're going to
+ * be running a full e2fsck run anyway... We clear orphan file contents
+ * after filesystem is checked to avoid clearing someone else's data.
*/
if (fs->super->s_state & EXT2_ERROR_FS)
return 0;
- if ((ino < EXT2_FIRST_INODE(fs->super)) ||
- (ino > fs->super->s_inodes_count)) {
+ if (ino && ((ino < EXT2_FIRST_INODE(fs->super)) ||
+ (ino > fs->super->s_inodes_count))) {
clear_problem_context(&pctx);
pctx.ino = ino;
fix_problem(ctx, PR_0_ORPHAN_ILLEGAL_HEAD_INODE, &pctx);
@@ -266,39 +416,23 @@ static int release_orphan_inodes(e2fsck_t ctx)
"block iterate buffer");
e2fsck_read_bitmaps(ctx);
+ /* First process orphan list */
while (ino) {
- e2fsck_read_inode(ctx, ino, &inode, "release_orphan_inodes");
- clear_problem_context(&pctx);
- pctx.ino = ino;
- pctx.inode = &inode;
- pctx.str = inode.i_links_count ? _("Truncating") :
- _("Clearing");
-
- fix_problem(ctx, PR_0_ORPHAN_CLEAR_INODE, &pctx);
-
- next_ino = inode.i_dtime;
- if (next_ino &&
- ((next_ino < EXT2_FIRST_INODE(fs->super)) ||
- (next_ino > fs->super->s_inodes_count))) {
- pctx.ino = next_ino;
- fix_problem(ctx, PR_0_ORPHAN_ILLEGAL_INODE, &pctx);
- goto return_abort;
- }
-
- if (release_inode_blocks(ctx, ino, &inode, block_buf, &pctx))
+ if (release_orphan_inode(ctx, &ino, block_buf))
goto return_abort;
+ }
- if (!inode.i_links_count) {
- ext2fs_inode_alloc_stats2(fs, ino, -1,
- LINUX_S_ISDIR(inode.i_mode));
- ctx->free_inodes++;
- inode.i_dtime = ctx->now;
- } else {
- inode.i_dtime = 0;
- }
- e2fsck_write_inode(ctx, ino, &inode, "delete_file");
- ino = next_ino;
+ /* Next process orphan file */
+ if (fs->super->s_feature_ro_compat &
+ EXT4_FEATURE_RO_COMPAT_ORPHAN_PRESENT &&
+ !(fs->super->s_feature_compat & EXT4_FEATURE_COMPAT_ORPHAN_FILE)) {
+ fix_problem(ctx, PR_0_ORPHAN_PRESENT_WITHOUT_FILE, &pctx);
+ goto return_abort;
}
+ if (process_orphan_file(ctx, block_buf))
+ goto return_abort;
+
+out:
ext2fs_free_mem(&block_buf);
return 0;
return_abort:
@@ -306,6 +440,86 @@ return_abort:
return 1;
}
+static int reinit_orphan_block(ext2_filsys fs,
+ blk64_t *block_nr,
+ e2_blkcnt_t blockcnt,
+ blk64_t ref_blk EXT2FS_ATTR((unused)),
+ int ref_offset EXT2FS_ATTR((unused)),
+ void *priv_data)
+{
+ struct process_orphan_block_data *pd;
+ e2fsck_t ctx;
+ blk64_t blk = *block_nr;
+ struct ext4_orphan_block_tail *tail;
+ int inodes_per_ob;
+ __u32 *bdata;
+ e2_blkcnt_t i;
+
+ pd = priv_data;
+ ctx = pd->ctx;
+
+ /* Orphan file must not have holes */
+ if (!blk) {
+return_abort:
+ pd->abort = 1;
+ return BLOCK_ABORT;
+ }
+ memset(pd->buf, 0, fs->blocksize);
+ tail = ext2fs_orphan_block_tail(fs, pd->buf);
+ tail->ob_magic = ext2fs_cpu_to_le32(EXT4_ORPHAN_BLOCK_MAGIC);
+ ext2fs_orphan_file_block_csum_set(fs, pd->buf);
+ inodes_per_ob = ext2fs_inodes_per_orphan_block(fs);
+ for (i = 0; i < blockcnt; i++) {
+ pd->errcode = io_channel_write_blk64(fs->io, blk + i, 1,
+ pd->buf);
+ if (pd->errcode)
+ goto return_abort;
+ }
+ return 0;
+}
+
+/*
+ * Check and clear orphan file. We just return non-zero if we hit some
+ * inconsistency. Caller will truncate & recreate new orphan file.
+ */
+int check_init_orphan_file(e2fsck_t ctx)
+{
+ ext2_filsys fs = ctx->fs;
+ char *orphan_buf;
+ struct process_orphan_block_data pd;
+ int ret = 0;
+ errcode_t retval;
+
+ orphan_buf = (char *) e2fsck_allocate_memory(ctx, fs->blocksize * 4,
+ "orphan block buffer");
+ pd.buf = orphan_buf + 3 * fs->blocksize;
+ pd.block_buf = NULL;
+ pd.ctx = ctx;
+ pd.abort = 0;
+ pd.errcode = 0;
+ retval = ext2fs_block_iterate3(fs, EXT4_ORPHAN_INO,
+ BLOCK_FLAG_DATA_ONLY | BLOCK_FLAG_HOLE,
+ orphan_buf, reinit_orphan_block, &pd);
+ if (retval) {
+ com_err("reinit_orphan_block", retval,
+ _("while calling ext2fs_block_iterate for inode %d"),
+ EXT4_ORPHAN_INO);
+ ret = 1;
+ goto out;
+ }
+ if (pd.abort) {
+ if (pd.errcode) {
+ com_err("process_orphan_block", pd.errcode,
+ _("while reading blocks of inode %d"),
+ EXT4_ORPHAN_INO);
+ }
+ ret = 1;
+ }
+out:
+ ext2fs_free_mem(&orphan_buf);
+ return 0;
+}
+
/*
* Check the resize inode to make sure it is sane. We check both for
* the case where on-line resizing is not enabled (in which case the
diff --git a/e2fsck/unix.c b/e2fsck/unix.c
index 3db34802c831..7e312d1c6369 100644
--- a/e2fsck/unix.c
+++ b/e2fsck/unix.c
@@ -1671,8 +1671,68 @@ print_unsupp_features:
_("\n*** journal has been regenerated ***\n"));
}
}
+
no_journal:
+ /* Orphan file will be clear - clear the feature unconditionally */
+ if (!(ctx->options & E2F_OPT_READONLY)) {
+ fs->super->s_feature_ro_compat &=
+ ~EXT4_FEATURE_RO_COMPAT_ORPHAN_PRESENT;
+ ext2fs_mark_super_dirty(fs);
+ }
+
+ /* If there isn't journal, no point in creating orphan file... */
+ if (fs->super->s_feature_compat & EXT4_FEATURE_COMPAT_ORPHAN_FILE) {
+ /* No point in orphan file without a journal... */
+ if (!(fs->super->s_feature_compat &
+ EXT3_FEATURE_COMPAT_HAS_JOURNAL) &&
+ fix_problem(ctx, PR_6_ORPHAN_FILE_WITHOUT_JOURNAL, &pctx)) {
+ retval = ext2fs_truncate_orphan_file(fs);
+ if (retval) {
+ /* Huh, failed to truncate file */
+ fix_problem(ctx, PR_6_ORPHAN_FILE_TRUNC_FAILED,
+ &pctx);
+ goto check_quotas;
+ }
+ goto check_quotas;
+ }
+ if (check_init_orphan_file(ctx) &&
+ fix_problem(ctx, PR_6_ORPHAN_FILE_CORRUPTED, &pctx)) {
+ int orphan_file_blocks;
+
+ if (ctx->invalid_bitmaps) {
+ fix_problem(ctx,
+ PR_6_ORPHAN_FILE_BITMAP_INVALID,
+ &pctx);
+ goto check_quotas;
+ }
+
+ retval = ext2fs_truncate_orphan_file(fs);
+ if (retval) {
+ /* Huh, failed to truncate file */
+ fix_problem(ctx, PR_6_ORPHAN_FILE_TRUNC_FAILED,
+ &pctx);
+ goto check_quotas;
+ }
+
+ orphan_file_blocks = ext2fs_default_orphan_file_blocks(
+ ext2fs_blocks_count(fs->super));
+ log_out(ctx, _("Creating orphan file (%d blocks): "),
+ orphan_file_blocks);
+ fflush(stdout);
+ retval = ext2fs_create_orphan_file(fs,
+ orphan_file_blocks);
+ if (retval) {
+ log_out(ctx, "%s: while trying to create "
+ "orphan file\n", error_message(retval));
+ fix_problem(ctx, PR_6_ORPHAN_FILE_CREATE_FAILED,
+ &pctx);
+ goto check_quotas;
+ }
+ log_out(ctx, "%s", _(" Done.\n"));
+ }
+ }
+check_quotas:
if (ctx->qctx) {
int i, needs_writeout;
for (i = 0; i < MAXQUOTAS; i++) {
--
2.1.4
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