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authorLinus Torvalds <torvalds@linux-foundation.org>2012-07-23 15:50:52 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-07-23 15:50:52 -0700
commit93912fe69d67597ee4c0b451d24539ead550bdc3 (patch)
treed12729aa17d43d0e8010d7ff3d6a0ef7ad70f304 /fs/ubifs
parent0ec4f431eb56d633da3a55da67d5c4b88886ccc7 (diff)
parent7074e5eb233343e4bad8c0a3f9e73167cf85a159 (diff)
Merge tag 'upstream-3.6-rc1' of git://git.infradead.org/linux-ubifs
Pull UBIFS updates from Artem Bityutskiy: - Added another debugfs knob for forcing UBIFS R/O mode without flushing caches or finishing commit or any other I/O operation. I've originally added this knob in order to reproduce the free space fixup bug (see commit c6727932cfdb: "UBIFS: fix a bug in empty space fix-up") on nandsim. Without this knob I would have to do real power-cuts, which would make debugging much harder. Then I've decided to keep this knob because it is also useful for UBIFS power-cut recovery end error-paths testing. - Well-spotted fix from Julia. This bug did not cause real troubles for UBIFS, but nevertheless it could cause issues for someone trying to modify the orphans handling code. Kudos to coccinelle! - Minor cleanups. * tag 'upstream-3.6-rc1' of git://git.infradead.org/linux-ubifs: UBIFS: remove invalid reference to list iterator variable UBIFS: simplify reply code a bit UBIFS: add debugfs knob to switch to R/O mode UBIFS: fix compilation warning
Diffstat (limited to 'fs/ubifs')
-rw-r--r--fs/ubifs/debug.c11
-rw-r--r--fs/ubifs/debug.h5
-rw-r--r--fs/ubifs/dir.c2
-rw-r--r--fs/ubifs/orphan.c4
-rw-r--r--fs/ubifs/replay.c20
5 files changed, 25 insertions, 17 deletions
diff --git a/fs/ubifs/debug.c b/fs/ubifs/debug.c
index 92df3b08153..bb3167257aa 100644
--- a/fs/ubifs/debug.c
+++ b/fs/ubifs/debug.c
@@ -2802,6 +2802,8 @@ static ssize_t dfs_file_read(struct file *file, char __user *u, size_t count,
val = d->chk_fs;
else if (dent == d->dfs_tst_rcvry)
val = d->tst_rcvry;
+ else if (dent == d->dfs_ro_error)
+ val = c->ro_error;
else
return -EINVAL;
@@ -2885,6 +2887,8 @@ static ssize_t dfs_file_write(struct file *file, const char __user *u,
d->chk_fs = val;
else if (dent == d->dfs_tst_rcvry)
d->tst_rcvry = val;
+ else if (dent == d->dfs_ro_error)
+ c->ro_error = !!val;
else
return -EINVAL;
@@ -2996,6 +3000,13 @@ int dbg_debugfs_init_fs(struct ubifs_info *c)
goto out_remove;
d->dfs_tst_rcvry = dent;
+ fname = "ro_error";
+ dent = debugfs_create_file(fname, S_IRUSR | S_IWUSR, d->dfs_dir, c,
+ &dfs_fops);
+ if (IS_ERR_OR_NULL(dent))
+ goto out_remove;
+ d->dfs_ro_error = dent;
+
return 0;
out_remove:
diff --git a/fs/ubifs/debug.h b/fs/ubifs/debug.h
index 486a8e024fb..8b8cc4e945f 100644
--- a/fs/ubifs/debug.h
+++ b/fs/ubifs/debug.h
@@ -79,6 +79,10 @@ typedef int (*dbg_znode_callback)(struct ubifs_info *c,
* @dfs_chk_lprops: debugfs knob to enable UBIFS LEP properties extra checks
* @dfs_chk_fs: debugfs knob to enable UBIFS contents extra checks
* @dfs_tst_rcvry: debugfs knob to enable UBIFS recovery testing
+ * @dfs_ro_error: debugfs knob to switch UBIFS to R/O mode (different to
+ * re-mounting to R/O mode because it does not flush any buffers
+ * and UBIFS just starts returning -EROFS on all write
+ * operations)
*/
struct ubifs_debug_info {
struct ubifs_zbranch old_zroot;
@@ -122,6 +126,7 @@ struct ubifs_debug_info {
struct dentry *dfs_chk_lprops;
struct dentry *dfs_chk_fs;
struct dentry *dfs_tst_rcvry;
+ struct dentry *dfs_ro_error;
};
/**
diff --git a/fs/ubifs/dir.c b/fs/ubifs/dir.c
index b1cca89aeb6..c95681cf1b7 100644
--- a/fs/ubifs/dir.c
+++ b/fs/ubifs/dir.c
@@ -969,7 +969,7 @@ static int ubifs_rename(struct inode *old_dir, struct dentry *old_dentry,
struct ubifs_budget_req ino_req = { .dirtied_ino = 1,
.dirtied_ino_d = ALIGN(old_inode_ui->data_len, 8) };
struct timespec time;
- unsigned int saved_nlink;
+ unsigned int uninitialized_var(saved_nlink);
/*
* Budget request settings: deletion direntry, new direntry, removing
diff --git a/fs/ubifs/orphan.c b/fs/ubifs/orphan.c
index b02734db187..cebf17ea045 100644
--- a/fs/ubifs/orphan.c
+++ b/fs/ubifs/orphan.c
@@ -176,7 +176,7 @@ int ubifs_orphan_start_commit(struct ubifs_info *c)
*last = orphan;
last = &orphan->cnext;
}
- *last = orphan->cnext;
+ *last = NULL;
c->cmt_orphans = c->new_orphans;
c->new_orphans = 0;
dbg_cmt("%d orphans to commit", c->cmt_orphans);
@@ -382,7 +382,7 @@ static int consolidate(struct ubifs_info *c)
last = &orphan->cnext;
cnt += 1;
}
- *last = orphan->cnext;
+ *last = NULL;
ubifs_assert(cnt == c->tot_orphans - c->new_orphans);
c->cmt_orphans = cnt;
c->ohead_lnum = c->orph_first;
diff --git a/fs/ubifs/replay.c b/fs/ubifs/replay.c
index 3a2da7e476e..eba46d4a761 100644
--- a/fs/ubifs/replay.c
+++ b/fs/ubifs/replay.c
@@ -1007,7 +1007,7 @@ out:
*/
int ubifs_replay_journal(struct ubifs_info *c)
{
- int err, i, lnum, offs, free;
+ int err, lnum, free;
BUILD_BUG_ON(UBIFS_TRUN_KEY > 5);
@@ -1025,25 +1025,17 @@ int ubifs_replay_journal(struct ubifs_info *c)
dbg_mnt("start replaying the journal");
c->replaying = 1;
lnum = c->ltail_lnum = c->lhead_lnum;
- offs = c->lhead_offs;
- for (i = 0; i < c->log_lebs; i++, lnum++) {
- if (lnum >= UBIFS_LOG_LNUM + c->log_lebs) {
- /*
- * The log is logically circular, we reached the last
- * LEB, switch to the first one.
- */
- lnum = UBIFS_LOG_LNUM;
- offs = 0;
- }
- err = replay_log_leb(c, lnum, offs, c->sbuf);
+ lnum = UBIFS_LOG_LNUM;
+ do {
+ err = replay_log_leb(c, lnum, 0, c->sbuf);
if (err == 1)
/* We hit the end of the log */
break;
if (err)
goto out;
- offs = 0;
- }
+ lnum = ubifs_next_log_lnum(c, lnum);
+ } while (lnum != UBIFS_LOG_LNUM);
err = replay_buds(c);
if (err)