mirror of https://github.com/hak5/openwrt.git
123 lines
4.0 KiB
Diff
123 lines
4.0 KiB
Diff
From 90bea5a3f0bf680b87b90516f3c231997f4b8f3b Mon Sep 17 00:00:00 2001
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From: Daniel Golle <daniel@makrotopia.org>
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Date: Mon, 2 Jun 2014 15:51:10 +0200
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X-Git-Url: http://git.infradead.org/linux-ubifs.git/commitdiff_plain/90bea5a3f0bf680b87b90516f3c231997f4b8f3b
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X-Git-Url: https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git/commit/?id=90bea5a3f0bf680b87b90516f3c231997f4b8f3b
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Subject: UBIFS: respect MS_SILENT mount flag
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When attempting to mount a non-ubifs formatted volume, lots of error
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messages (including a stack dump) are thrown to the kernel log even if
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the MS_SILENT mount flag is set.
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Fix this by introducing adding an additional state-variable in
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struct ubifs_info and suppress error messages in ubifs_read_node if
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MS_SILENT is set.
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Signed-off-by: Daniel Golle <daniel@makrotopia.org>
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Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
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---
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fs/ubifs/io.c | 18 ++++++++++--------
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fs/ubifs/super.c | 5 +++++
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fs/ubifs/ubifs.h | 11 +++++++++++
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3 files changed, 26 insertions(+), 8 deletions(-)
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---
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--- a/fs/ubifs/io.c
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+++ b/fs/ubifs/io.c
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@@ -988,30 +988,32 @@ int ubifs_read_node(const struct ubifs_i
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return err;
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if (type != ch->node_type) {
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- ubifs_err("bad node type (%d but expected %d)",
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- ch->node_type, type);
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+ ubifs_errc(c, "bad node type (%d but expected %d)",
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+ ch->node_type, type);
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goto out;
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}
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err = ubifs_check_node(c, buf, lnum, offs, 0, 0);
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if (err) {
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- ubifs_err("expected node type %d", type);
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+ ubifs_errc(c, "expected node type %d", type);
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return err;
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}
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l = le32_to_cpu(ch->len);
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if (l != len) {
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- ubifs_err("bad node length %d, expected %d", l, len);
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+ ubifs_errc(c, "bad node length %d, expected %d", l, len);
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goto out;
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}
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return 0;
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out:
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- ubifs_err("bad node at LEB %d:%d, LEB mapping status %d", lnum, offs,
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- ubi_is_mapped(c->ubi, lnum));
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- ubifs_dump_node(c, buf);
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- dump_stack();
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+ ubifs_errc(c, "bad node at LEB %d:%d, LEB mapping status %d", lnum,
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+ offs, ubi_is_mapped(c->ubi, lnum));
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+ if (!c->probing) {
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+ ubifs_dump_node(c, buf);
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+ dump_stack();
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+ }
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return -EINVAL;
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}
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--- a/fs/ubifs/super.c
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+++ b/fs/ubifs/super.c
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@@ -1149,6 +1149,9 @@ static int mount_ubifs(struct ubifs_info
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size_t sz;
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c->ro_mount = !!(c->vfs_sb->s_flags & MS_RDONLY);
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+ /* Suppress error messages while probing if MS_SILENT is set */
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+ c->probing = !!(c->vfs_sb->s_flags & MS_SILENT);
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+
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err = init_constants_early(c);
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if (err)
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return err;
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@@ -1214,6 +1217,8 @@ static int mount_ubifs(struct ubifs_info
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if (err)
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goto out_free;
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+ c->probing = 0;
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+
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/*
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* Make sure the compressor which is set as default in the superblock
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* or overridden by mount options is actually compiled in.
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--- a/fs/ubifs/ubifs.h
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+++ b/fs/ubifs/ubifs.h
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@@ -51,6 +51,15 @@
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#define ubifs_warn(fmt, ...) \
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pr_warn("UBIFS warning (pid %d): %s: " fmt "\n", \
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current->pid, __func__, ##__VA_ARGS__)
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+/*
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+ * A variant of 'ubifs_err()' which takes the UBIFS file-sytem description
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+ * object as an argument.
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+ */
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+#define ubifs_errc(c, fmt, ...) \
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+ do { \
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+ if (!(c)->probing) \
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+ ubifs_err(fmt, ##__VA_ARGS__); \
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+ } while (0)
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/* UBIFS file system VFS magic number */
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#define UBIFS_SUPER_MAGIC 0x24051905
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@@ -1209,6 +1218,7 @@ struct ubifs_debug_info;
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* @need_recovery: %1 if the file-system needs recovery
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* @replaying: %1 during journal replay
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* @mounting: %1 while mounting
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+ * @probing: %1 while attempting to mount if MS_SILENT mount flag is set
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* @remounting_rw: %1 while re-mounting from R/O mode to R/W mode
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* @replay_list: temporary list used during journal replay
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* @replay_buds: list of buds to replay
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@@ -1441,6 +1451,7 @@ struct ubifs_info {
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unsigned int replaying:1;
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unsigned int mounting:1;
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unsigned int remounting_rw:1;
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+ unsigned int probing:1;
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struct list_head replay_list;
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struct list_head replay_buds;
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unsigned long long cs_sqnum;
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