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Merge branch 'linux-next' of git://git.infradead.org/ubifs-2.6

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* 'linux-next' of git://git.infradead.org/ubifs-2.6:
  UBIFS: fix corruption dump
  UBIFS: clean up free space checking
  UBIFS: small amendments in the LEB scanning code
  UBIFS: dump a little more in case of corruptions
  MAINTAINERS: update ahunter's e-mail address
  UBIFS: allow more than one volume to be mounted
  UBIFS: fix assertion warning
  UBIFS: minor spelling and grammar fixes
  UBIFS: fix 64-bit divisions in debug print
  UBIFS: few spelling fixes
  UBIFS: set write-buffer timout to 3-5 seconds
  UBIFS: slightly optimize write-buffer timer usage
  UBIFS: improve debugging messaged
  UBIFS: fix integer overflow warning
This commit is contained in:
Linus Torvalds 2009-07-10 19:14:48 -07:00
commit 44c695b13b
7 changed files with 93 additions and 77 deletions
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2
MAINTAINERS
View File

@ -5854,7 +5854,7 @@ UBI FILE SYSTEM (UBIFS)
P: Artem Bityutskiy
M: dedekind@infradead.org
P: Adrian Hunter
M: ext-adrian.hunter@nokia.com
M: adrian.hunter@nokia.com
L: linux-mtd@lists.infradead.org
T: git git://git.infradead.org/ubifs-2.6.git
W: http://www.linux-mtd.infradead.org/doc/ubifs.html

57
fs/ubifs/io.c
View File

@ -297,6 +297,7 @@ static enum hrtimer_restart wbuf_timer_callback_nolock(struct hrtimer *timer)
{
struct ubifs_wbuf *wbuf = container_of(timer, struct ubifs_wbuf, timer);
dbg_io("jhead %d", wbuf->jhead);
wbuf->need_sync = 1;
wbuf->c->need_wbuf_sync = 1;
ubifs_wake_up_bgt(wbuf->c);
@ -311,8 +312,12 @@ static void new_wbuf_timer_nolock(struct ubifs_wbuf *wbuf)
{
ubifs_assert(!hrtimer_active(&wbuf->timer));
if (!ktime_to_ns(wbuf->softlimit))
if (wbuf->no_timer)
return;
dbg_io("set timer for jhead %d, %llu-%llu millisecs", wbuf->jhead,
div_u64(ktime_to_ns(wbuf->softlimit), USEC_PER_SEC),
div_u64(ktime_to_ns(wbuf->softlimit) + wbuf->delta,
USEC_PER_SEC));
hrtimer_start_range_ns(&wbuf->timer, wbuf->softlimit, wbuf->delta,
HRTIMER_MODE_REL);
}
@ -323,11 +328,8 @@ static void new_wbuf_timer_nolock(struct ubifs_wbuf *wbuf)
*/
static void cancel_wbuf_timer_nolock(struct ubifs_wbuf *wbuf)
{
/*
* If the syncer is waiting for the lock (from the background thread's
* context) and another task is changing write-buffer then the syncing
* should be canceled.
*/
if (wbuf->no_timer)
return;
wbuf->need_sync = 0;
hrtimer_cancel(&wbuf->timer);
}
@ -349,8 +351,8 @@ int ubifs_wbuf_sync_nolock(struct ubifs_wbuf *wbuf)
/* Write-buffer is empty or not seeked */
return 0;
dbg_io("LEB %d:%d, %d bytes",
wbuf->lnum, wbuf->offs, wbuf->used);
dbg_io("LEB %d:%d, %d bytes, jhead %d",
wbuf->lnum, wbuf->offs, wbuf->used, wbuf->jhead);
ubifs_assert(!(c->vfs_sb->s_flags & MS_RDONLY));
ubifs_assert(!(wbuf->avail & 7));
ubifs_assert(wbuf->offs + c->min_io_size <= c->leb_size);
@ -390,7 +392,7 @@ int ubifs_wbuf_sync_nolock(struct ubifs_wbuf *wbuf)
* @offs: logical eraseblock offset to seek to
* @dtype: data type
*
* This function targets the write buffer to logical eraseblock @lnum:@offs.
* This function targets the write-buffer to logical eraseblock @lnum:@offs.
* The write-buffer is synchronized if it is not empty. Returns zero in case of
* success and a negative error code in case of failure.
*/
@ -399,7 +401,7 @@ int ubifs_wbuf_seek_nolock(struct ubifs_wbuf *wbuf, int lnum, int offs,
{
const struct ubifs_info *c = wbuf->c;
dbg_io("LEB %d:%d", lnum, offs);
dbg_io("LEB %d:%d, jhead %d", lnum, offs, wbuf->jhead);
ubifs_assert(lnum >= 0 && lnum < c->leb_cnt);
ubifs_assert(offs >= 0 && offs <= c->leb_size);
ubifs_assert(offs % c->min_io_size == 0 && !(offs & 7));
@ -506,9 +508,9 @@ int ubifs_wbuf_write_nolock(struct ubifs_wbuf *wbuf, void *buf, int len)
struct ubifs_info *c = wbuf->c;
int err, written, n, aligned_len = ALIGN(len, 8), offs;
dbg_io("%d bytes (%s) to wbuf at LEB %d:%d", len,
dbg_ntype(((struct ubifs_ch *)buf)->node_type), wbuf->lnum,
wbuf->offs + wbuf->used);
dbg_io("%d bytes (%s) to jhead %d wbuf at LEB %d:%d", len,
dbg_ntype(((struct ubifs_ch *)buf)->node_type), wbuf->jhead,
wbuf->lnum, wbuf->offs + wbuf->used);
ubifs_assert(len > 0 && wbuf->lnum >= 0 && wbuf->lnum < c->leb_cnt);
ubifs_assert(wbuf->offs >= 0 && wbuf->offs % c->min_io_size == 0);
ubifs_assert(!(wbuf->offs & 7) && wbuf->offs <= c->leb_size);
@ -533,8 +535,8 @@ int ubifs_wbuf_write_nolock(struct ubifs_wbuf *wbuf, void *buf, int len)
memcpy(wbuf->buf + wbuf->used, buf, len);
if (aligned_len == wbuf->avail) {
dbg_io("flush wbuf to LEB %d:%d", wbuf->lnum,
wbuf->offs);
dbg_io("flush jhead %d wbuf to LEB %d:%d",
wbuf->jhead, wbuf->lnum, wbuf->offs);
err = ubi_leb_write(c->ubi, wbuf->lnum, wbuf->buf,
wbuf->offs, c->min_io_size,
wbuf->dtype);
@ -562,7 +564,8 @@ int ubifs_wbuf_write_nolock(struct ubifs_wbuf *wbuf, void *buf, int len)
* minimal I/O unit. We have to fill and flush write-buffer and switch
* to the next min. I/O unit.
*/
dbg_io("flush wbuf to LEB %d:%d", wbuf->lnum, wbuf->offs);
dbg_io("flush jhead %d wbuf to LEB %d:%d",
wbuf->jhead, wbuf->lnum, wbuf->offs);
memcpy(wbuf->buf + wbuf->used, buf, wbuf->avail);
err = ubi_leb_write(c->ubi, wbuf->lnum, wbuf->buf, wbuf->offs,
c->min_io_size, wbuf->dtype);
@ -695,7 +698,8 @@ int ubifs_read_node_wbuf(struct ubifs_wbuf *wbuf, void *buf, int type, int len,
int err, rlen, overlap;
struct ubifs_ch *ch = buf;
dbg_io("LEB %d:%d, %s, length %d", lnum, offs, dbg_ntype(type), len);
dbg_io("LEB %d:%d, %s, length %d, jhead %d", lnum, offs,
dbg_ntype(type), len, wbuf->jhead);
ubifs_assert(wbuf && lnum >= 0 && lnum < c->leb_cnt && offs >= 0);
ubifs_assert(!(offs & 7) && offs < c->leb_size);
ubifs_assert(type >= 0 && type < UBIFS_NODE_TYPES_CNT);
@ -819,13 +823,12 @@ int ubifs_read_node(const struct ubifs_info *c, void *buf, int type, int len,
* @c: UBIFS file-system description object
* @wbuf: write-buffer to initialize
*
* This function initializes write buffer. Returns zero in case of success
* This function initializes write-buffer. Returns zero in case of success
* %-ENOMEM in case of failure.
*/
int ubifs_wbuf_init(struct ubifs_info *c, struct ubifs_wbuf *wbuf)
{
size_t size;
ktime_t hardlimit;
wbuf->buf = kmalloc(c->min_io_size, GFP_KERNEL);
if (!wbuf->buf)
@ -851,22 +854,16 @@ int ubifs_wbuf_init(struct ubifs_info *c, struct ubifs_wbuf *wbuf)
hrtimer_init(&wbuf->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
wbuf->timer.function = wbuf_timer_callback_nolock;
/*
* Make write-buffer soft limit to be 20% of the hard limit. The
* write-buffer timer is allowed to expire any time between the soft
* and hard limits.
*/
hardlimit = ktime_set(DEFAULT_WBUF_TIMEOUT_SECS, 0);
wbuf->delta = (DEFAULT_WBUF_TIMEOUT_SECS * NSEC_PER_SEC) * 2 / 10;
wbuf->softlimit = ktime_sub_ns(hardlimit, wbuf->delta);
hrtimer_set_expires_range_ns(&wbuf->timer, wbuf->softlimit,
wbuf->delta);
wbuf->softlimit = ktime_set(WBUF_TIMEOUT_SOFTLIMIT, 0);
wbuf->delta = WBUF_TIMEOUT_HARDLIMIT - WBUF_TIMEOUT_SOFTLIMIT;
wbuf->delta *= 1000000000ULL;
ubifs_assert(wbuf->delta <= ULONG_MAX);
return 0;
}
/**
* ubifs_wbuf_add_ino_nolock - add an inode number into the wbuf inode array.
* @wbuf: the write-buffer whereto add
* @wbuf: the write-buffer where to add
* @inum: the inode number
*
* This function adds an inode number to the inode array of the write-buffer.

57
fs/ubifs/recovery.c
View File

@ -52,6 +52,25 @@ static int is_empty(void *buf, int len)
return 1;
}
/**
* first_non_ff - find offset of the first non-0xff byte.
* @buf: buffer to search in
* @len: length of buffer
*
* This function returns offset of the first non-0xff byte in @buf or %-1 if
* the buffer contains only 0xff bytes.
*/
static int first_non_ff(void *buf, int len)
{
uint8_t *p = buf;
int i;
for (i = 0; i < len; i++)
if (*p++ != 0xff)
return i;
return -1;
}
/**
* get_master_node - get the last valid master node allowing for corruption.
* @c: UBIFS file-system description object
@ -357,11 +376,7 @@ static int is_last_write(const struct ubifs_info *c, void *buf, int offs)
empty_offs = ALIGN(offs + 1, c->min_io_size);
check_len = c->leb_size - empty_offs;
p = buf + empty_offs - offs;
for (; check_len > 0; check_len--)
if (*p++ != 0xff)
return 0;
return 1;
return is_empty(p, check_len);
}
/**
@ -543,8 +558,8 @@ static int drop_incomplete_group(struct ubifs_scan_leb *sleb, int *offs)
*
* This function does a scan of a LEB, but caters for errors that might have
* been caused by the unclean unmount from which we are attempting to recover.
*
* This function returns %0 on success and a negative error code on failure.
* Returns %0 in case of success, %-EUCLEAN if an unrecoverable corruption is
* found, and a negative error code in case of failure.
*/
struct ubifs_scan_leb *ubifs_recover_leb(struct ubifs_info *c, int lnum,
int offs, void *sbuf, int grouped)
@ -643,7 +658,8 @@ struct ubifs_scan_leb *ubifs_recover_leb(struct ubifs_info *c, int lnum,
goto corrupted;
default:
dbg_err("unknown");
goto corrupted;
err = -EINVAL;
goto error;
}
}
@ -652,8 +668,13 @@ struct ubifs_scan_leb *ubifs_recover_leb(struct ubifs_info *c, int lnum,
clean_buf(c, &buf, lnum, &offs, &len);
need_clean = 1;
} else {
ubifs_err("corrupt empty space at LEB %d:%d",
lnum, offs);
int corruption = first_non_ff(buf, len);
ubifs_err("corrupt empty space LEB %d:%d, corruption "
"starts at %d", lnum, offs, corruption);
/* Make sure we dump interesting non-0xFF data */
offs = corruption;
buf += corruption;
goto corrupted;
}
}
@ -813,7 +834,7 @@ struct ubifs_scan_leb *ubifs_recover_log_leb(struct ubifs_info *c, int lnum,
static int recover_head(const struct ubifs_info *c, int lnum, int offs,
void *sbuf)
{
int len, err, need_clean = 0;
int len, err;
if (c->min_io_size > 1)
len = c->min_io_size;
@ -827,19 +848,7 @@ static int recover_head(const struct ubifs_info *c, int lnum, int offs,
/* Read at the head location and check it is empty flash */
err = ubi_read(c->ubi, lnum, sbuf, offs, len);
if (err)
need_clean = 1;
else {
uint8_t *p = sbuf;
while (len--)
if (*p++ != 0xff) {
need_clean = 1;
break;
}
}
if (need_clean) {
if (err || !is_empty(sbuf, len)) {
dbg_rcvry("cleaning head at %d:%d", lnum, offs);
if (offs == 0)
return ubifs_leb_unmap(c, lnum);

9
fs/ubifs/replay.c
View File

@ -837,9 +837,10 @@ static int replay_log_leb(struct ubifs_info *c, int lnum, int offs, void *sbuf)
dbg_mnt("replay log LEB %d:%d", lnum, offs);
sleb = ubifs_scan(c, lnum, offs, sbuf);
if (IS_ERR(sleb)) {
if (c->need_recovery)
sleb = ubifs_recover_log_leb(c, lnum, offs, sbuf);
if (IS_ERR(sleb) ) {
if (PTR_ERR(sleb) != -EUCLEAN || !c->need_recovery)
return PTR_ERR(sleb);
sleb = ubifs_recover_log_leb(c, lnum, offs, sbuf);
if (IS_ERR(sleb))
return PTR_ERR(sleb);
}
@ -957,7 +958,7 @@ static int replay_log_leb(struct ubifs_info *c, int lnum, int offs, void *sbuf)
return err;
out_dump:
ubifs_err("log error detected while replying the log at LEB %d:%d",
ubifs_err("log error detected while replaying the log at LEB %d:%d",
lnum, offs + snod->offs);
dbg_dump_node(c, snod->node);
ubifs_scan_destroy(sleb);

20
fs/ubifs/scan.c
View File

@ -238,12 +238,12 @@ void ubifs_scanned_corruption(const struct ubifs_info *c, int lnum, int offs,
{
int len;
ubifs_err("corrupted data at LEB %d:%d", lnum, offs);
ubifs_err("corruption at LEB %d:%d", lnum, offs);
if (dbg_failure_mode)
return;
len = c->leb_size - offs;
if (len > 4096)
len = 4096;
if (len > 8192)
len = 8192;
dbg_err("first %d bytes from LEB %d:%d", len, lnum, offs);
print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 32, 4, buf, len, 1);
}
@ -256,7 +256,9 @@ void ubifs_scanned_corruption(const struct ubifs_info *c, int lnum, int offs,
* @sbuf: scan buffer (must be c->leb_size)
*
* This function scans LEB number @lnum and returns complete information about
* its contents. Returns an error code in case of failure.
* its contents. Returns the scaned information in case of success and,
* %-EUCLEAN if the LEB neads recovery, and other negative error codes in case
* of failure.
*/
struct ubifs_scan_leb *ubifs_scan(const struct ubifs_info *c, int lnum,
int offs, void *sbuf)
@ -279,7 +281,6 @@ struct ubifs_scan_leb *ubifs_scan(const struct ubifs_info *c, int lnum,
cond_resched();
ret = ubifs_scan_a_node(c, buf, len, lnum, offs, 0);
if (ret > 0) {
/* Padding bytes or a valid padding node */
offs += ret;
@ -304,7 +305,8 @@ struct ubifs_scan_leb *ubifs_scan(const struct ubifs_info *c, int lnum,
goto corrupted;
default:
dbg_err("unknown");
goto corrupted;
err = -EINVAL;
goto error;
}
err = ubifs_add_snod(c, sleb, buf, offs);
@ -317,8 +319,10 @@ struct ubifs_scan_leb *ubifs_scan(const struct ubifs_info *c, int lnum,
len -= node_len;
}
if (offs % c->min_io_size)
goto corrupted;
if (offs % c->min_io_size) {
ubifs_err("empty space starts at non-aligned offset %d", offs);
goto corrupted;;
}
ubifs_end_scan(c, sleb, lnum, offs);

14
fs/ubifs/super.c
View File

@ -797,7 +797,7 @@ static int alloc_wbufs(struct ubifs_info *c)
* does not need to be synchronized by timer.
*/
c->jheads[GCHD].wbuf.dtype = UBI_LONGTERM;
c->jheads[GCHD].wbuf.softlimit = ktime_set(0, 0);
c->jheads[GCHD].wbuf.no_timer = 1;
return 0;
}
@ -986,7 +986,7 @@ static int ubifs_parse_options(struct ubifs_info *c, char *options,
switch (token) {
/*
* %Opt_fast_unmount and %Opt_norm_unmount options are ignored.
* We accepte them in order to be backware-compatible. But this
* We accept them in order to be backward-compatible. But this
* should be removed at some point.
*/
case Opt_fast_unmount:
@ -1287,6 +1287,9 @@ static int mount_ubifs(struct ubifs_info *c)
if (err)
goto out_journal;
/* Calculate 'min_idx_lebs' after journal replay */
c->min_idx_lebs = ubifs_calc_min_idx_lebs(c);
err = ubifs_mount_orphans(c, c->need_recovery, mounted_read_only);
if (err)
goto out_orphans;
@ -1754,10 +1757,8 @@ static void ubifs_put_super(struct super_block *sb)
/* Synchronize write-buffers */
if (c->jheads)
for (i = 0; i < c->jhead_cnt; i++) {
for (i = 0; i < c->jhead_cnt; i++)
ubifs_wbuf_sync(&c->jheads[i].wbuf);
hrtimer_cancel(&c->jheads[i].wbuf.timer);
}
/*
* On fatal errors c->ro_media is set to 1, in which case we do
@ -1975,7 +1976,8 @@ static int ubifs_fill_super(struct super_block *sb, void *data, int silent)
err = bdi_init(&c->bdi);
if (err)
goto out_close;
err = bdi_register(&c->bdi, NULL, "ubifs");
err = bdi_register(&c->bdi, NULL, "ubifs_%d_%d",
c->vi.ubi_num, c->vi.vol_id);
if (err)
goto out_bdi;

11
fs/ubifs/ubifs.h
View File

@ -95,8 +95,9 @@
*/
#define BGT_NAME_PATTERN "ubifs_bgt%d_%d"
/* Default write-buffer synchronization timeout in seconds */
#define DEFAULT_WBUF_TIMEOUT_SECS 5
/* Write-buffer synchronization timeout interval in seconds */
#define WBUF_TIMEOUT_SOFTLIMIT 3
#define WBUF_TIMEOUT_HARDLIMIT 5
/* Maximum possible inode number (only 32-bit inodes are supported now) */
#define MAX_INUM 0xFFFFFFFF
@ -654,7 +655,8 @@ typedef int (*ubifs_lpt_scan_callback)(struct ubifs_info *c,
* @delta: hard and soft timeouts delta (the timer expire inteval is @softlimit
* and @softlimit + @delta)
* @timer: write-buffer timer
* @need_sync: it is set if its timer expired and needs sync
* @no_timer: non-zero if this write-buffer does not have a timer
* @need_sync: non-zero if the timer expired and the wbuf needs sync'ing
* @next_ino: points to the next position of the following inode number
* @inodes: stores the inode numbers of the nodes which are in wbuf
*
@ -683,7 +685,8 @@ struct ubifs_wbuf {
ktime_t softlimit;
unsigned long long delta;
struct hrtimer timer;
int need_sync;
unsigned int no_timer:1;
unsigned int need_sync:1;
int next_ino;
ino_t *inodes;
};