Merge branch 'linux-next' of git://git.infradead.org/ubifs-2.6 (b7c142db) · Commits · e / devices / android_kernel_fairphone_FP3

fs/ubifs/budget.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -91,7 +91,6 @@ static int shrink_liability(struct ubifs_info *c, int nr_to_write)
		return nr_written;
		}


		/**
		* run_gc - run garbage collector.
		* @c: UBIFS file-system description object
		@@ -628,7 +627,7 @@ void ubifs_convert_page_budget(struct ubifs_info *c)
		*
		* This function releases budget corresponding to a dirty inode. It is usually
		* called when after the inode has been written to the media and marked as
		* clean.
		* clean. It also causes the "no space" flags to be cleared.
		*/
		void ubifs_release_dirty_inode_budget(struct ubifs_info *c,
		struct ubifs_inode *ui)
		@@ -636,6 +635,7 @@ void ubifs_release_dirty_inode_budget(struct ubifs_info *c,
		struct ubifs_budget_req req;

		memset(&req, 0, sizeof(struct ubifs_budget_req));
		/* The "no space" flags will be cleared because dd_growth is > 0 */
		req.dd_growth = c->inode_budget + ALIGN(ui->data_len, 8);
		ubifs_release_budget(c, &req);
		}

fs/ubifs/dir.c

+19 −0

Original line number	Diff line number	Diff line
		@@ -528,6 +528,25 @@ static int ubifs_link(struct dentry old_dentry, struct inode dir,
		inode->i_nlink, dir->i_ino);
		ubifs_assert(mutex_is_locked(&dir->i_mutex));
		ubifs_assert(mutex_is_locked(&inode->i_mutex));

		/*
		* Return -ENOENT if we've raced with unlink and i_nlink is 0. Doing
		* otherwise has the potential to corrupt the orphan inode list.
		*
		* Indeed, consider a scenario when 'vfs_link(dirA/fileA)' and
		* 'vfs_unlink(dirA/fileA, dirB/fileB)' race. 'vfs_link()' does not
		* lock 'dirA->i_mutex', so this is possible. Both of the functions
		* lock 'fileA->i_mutex' though. Suppose 'vfs_unlink()' wins, and takes
		* 'fileA->i_mutex' mutex first. Suppose 'fileA->i_nlink' is 1. In this
		* case 'ubifs_unlink()' will drop the last reference, and put 'inodeA'
		* to the list of orphans. After this, 'vfs_link()' will link
		* 'dirB/fileB' to 'inodeA'. This is a problem because, for example,
		* the subsequent 'vfs_unlink(dirB/fileB)' will add the same inode
		* to the list of orphans.
		*/
		if (inode->i_nlink == 0)
		return -ENOENT;

		err = dbg_check_synced_i_size(inode);
		if (err)
		return err;

fs/ubifs/io.c

+21 −13

Original line number	Diff line number	Diff line
		@@ -293,13 +293,14 @@ void ubifs_prep_grp_node(struct ubifs_info c, void node, int len, int last)
		*
		* This function is called when the write-buffer timer expires.
		*/
		static void wbuf_timer_callback_nolock(unsigned long data)
		static enum hrtimer_restart wbuf_timer_callback_nolock(struct hrtimer *timer)
		{
		struct ubifs_wbuf wbuf = (struct ubifs_wbuf )data;
		struct ubifs_wbuf *wbuf = container_of(timer, struct ubifs_wbuf, timer);

		wbuf->need_sync = 1;
		wbuf->c->need_wbuf_sync = 1;
		ubifs_wake_up_bgt(wbuf->c);
		return HRTIMER_NORESTART;
		}

		/**
		@@ -308,13 +309,12 @@ static void wbuf_timer_callback_nolock(unsigned long data)
		*/
		static void new_wbuf_timer_nolock(struct ubifs_wbuf *wbuf)
		{
		ubifs_assert(!timer_pending(&wbuf->timer));
		ubifs_assert(!hrtimer_active(&wbuf->timer));

		if (!wbuf->timeout)
		if (!ktime_to_ns(wbuf->softlimit))
		return;

		wbuf->timer.expires = jiffies + wbuf->timeout;
		add_timer(&wbuf->timer);
		hrtimer_start_range_ns(&wbuf->timer, wbuf->softlimit, wbuf->delta,
		HRTIMER_MODE_REL);
		}

		/**
		@@ -329,7 +329,7 @@ static void cancel_wbuf_timer_nolock(struct ubifs_wbuf *wbuf)
		* should be canceled.
		*/
		wbuf->need_sync = 0;
		del_timer(&wbuf->timer);
		hrtimer_cancel(&wbuf->timer);
		}

		/**
		@@ -825,6 +825,7 @@ int ubifs_read_node(const struct ubifs_info c, void buf, int type, int len,
		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)
		@@ -845,14 +846,21 @@ int ubifs_wbuf_init(struct ubifs_info c, struct ubifs_wbuf wbuf)
		wbuf->sync_callback = NULL;
		mutex_init(&wbuf->io_mutex);
		spin_lock_init(&wbuf->lock);

		wbuf->c = c;
		init_timer(&wbuf->timer);
		wbuf->timer.function = wbuf_timer_callback_nolock;
		wbuf->timer.data = (unsigned long)wbuf;
		wbuf->timeout = DEFAULT_WBUF_TIMEOUT;
		wbuf->next_ino = 0;

		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);
		return 0;
		}

fs/ubifs/recovery.c

+4 −27

Original line number	Diff line number	Diff line
		@@ -343,33 +343,15 @@ int ubifs_write_rcvrd_mst_node(struct ubifs_info *c)
		*
		* This function returns %1 if @offs was in the last write to the LEB whose data
		* is in @buf, otherwise %0 is returned. The determination is made by checking
		* for subsequent empty space starting from the next min_io_size boundary (or a
		* bit less than the common header size if min_io_size is one).
		* for subsequent empty space starting from the next @c->min_io_size boundary.
		*/
		static int is_last_write(const struct ubifs_info c, void buf, int offs)
		{
		int empty_offs;
		int check_len;
		int empty_offs, check_len;
		uint8_t *p;

		if (c->min_io_size == 1) {
		check_len = c->leb_size - offs;
		p = buf + check_len;
		for (; check_len > 0; check_len--)
		if (*--p != 0xff)
		break;
		/*
		* 'check_len' is the size of the corruption which cannot be
		* more than the size of 1 node if it was caused by an unclean
		* unmount.
		*/
		if (check_len > UBIFS_MAX_NODE_SZ)
		return 0;
		return 1;
		}

		/*
		* Round up to the next c->min_io_size boundary i.e. 'offs' is in the
		* Round up to the next @c->min_io_size boundary i.e. @offs is in the
		* last wbuf written. After that should be empty space.
		*/
		empty_offs = ALIGN(offs + 1, c->min_io_size);
		@@ -392,7 +374,7 @@ static int is_last_write(const struct ubifs_info c, void buf, int offs)
		*
		* This function pads up to the next min_io_size boundary (if there is one) and
		* sets empty space to all 0xff. @buf, @offs and @len are updated to the next
		* min_io_size boundary (if there is one).
		* @c->min_io_size boundary.
		*/
		static void clean_buf(const struct ubifs_info c, void *buf, int lnum,
		int offs, int len)
		@@ -402,11 +384,6 @@ static void clean_buf(const struct ubifs_info c, void *buf, int lnum,
		lnum = lnum;
		dbg_rcvry("cleaning corruption at %d:%d", lnum, *offs);

		if (c->min_io_size == 1) {
		memset(buf, 0xff, c->leb_size - offs);
		return;
		}

		ubifs_assert(!(*offs & 7));
		empty_offs = ALIGN(*offs, c->min_io_size);
		pad_len = empty_offs - *offs;

fs/ubifs/super.c

+48 −25

Original line number	Diff line number	Diff line
		@@ -361,6 +361,11 @@ static void ubifs_delete_inode(struct inode *inode)
		out:
		if (ui->dirty)
		ubifs_release_dirty_inode_budget(c, ui);
		else {
		/* We've deleted something - clean the "no space" flags */
		c->nospace = c->nospace_rp = 0;
		smp_wmb();
		}
		clear_inode(inode);
		}

		@@ -792,7 +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.timeout = 0;
		c->jheads[GCHD].wbuf.softlimit = ktime_set(0, 0);

		return 0;
		}
		@@ -932,6 +937,27 @@ static const match_table_t tokens = {
		{Opt_err, NULL},
		};

		/**
		* parse_standard_option - parse a standard mount option.
		* @option: the option to parse
		*
		* Normally, standard mount options like "sync" are passed to file-systems as
		* flags. However, when a "rootflags=" kernel boot parameter is used, they may
		* be present in the options string. This function tries to deal with this
		* situation and parse standard options. Returns 0 if the option was not
		* recognized, and the corresponding integer flag if it was.
		*
		* UBIFS is only interested in the "sync" option, so do not check for anything
		* else.
		*/
		static int parse_standard_option(const char *option)
		{
		ubifs_msg("parse %s", option);
		if (!strcmp(option, "sync"))
		return MS_SYNCHRONOUS;
		return 0;
		}

		/**
		* ubifs_parse_options - parse mount parameters.
		* @c: UBIFS file-system description object
		@@ -1008,10 +1034,20 @@ static int ubifs_parse_options(struct ubifs_info c, char options,
		break;
		}
		default:
		{
		unsigned long flag;
		struct super_block *sb = c->vfs_sb;

		flag = parse_standard_option(p);
		if (!flag) {
		ubifs_err("unrecognized mount option \"%s\" "
		"or missing value", p);
		return -EINVAL;
		}
		sb->s_flags \|= flag;
		break;
		}
		}
		}

		return 0;
		@@ -1180,6 +1216,7 @@ static int mount_ubifs(struct ubifs_info *c)
		if (!ubifs_compr_present(c->default_compr)) {
		ubifs_err("'compressor \"%s\" is not compiled in",
		ubifs_compr_name(c->default_compr));
		err = -ENOTSUPP;
		goto out_free;
		}

		@@ -1656,7 +1693,7 @@ static void ubifs_remount_ro(struct ubifs_info *c)

		for (i = 0; i < c->jhead_cnt; i++) {
		ubifs_wbuf_sync(&c->jheads[i].wbuf);
		del_timer_sync(&c->jheads[i].wbuf.timer);
		hrtimer_cancel(&c->jheads[i].wbuf.timer);
		}

		c->mst_node->flags &= ~cpu_to_le32(UBIFS_MST_DIRTY);
		@@ -1719,7 +1756,7 @@ static void ubifs_put_super(struct super_block *sb)
		if (c->jheads)
		for (i = 0; i < c->jhead_cnt; i++) {
		ubifs_wbuf_sync(&c->jheads[i].wbuf);
		del_timer_sync(&c->jheads[i].wbuf.timer);
		hrtimer_cancel(&c->jheads[i].wbuf.timer);
		}

		/*
		@@ -1911,6 +1948,7 @@ static int ubifs_fill_super(struct super_block sb, void data, int silent)
		INIT_LIST_HEAD(&c->orph_list);
		INIT_LIST_HEAD(&c->orph_new);

		c->vfs_sb = sb;
		c->highest_inum = UBIFS_FIRST_INO;
		c->lhead_lnum = c->ltail_lnum = UBIFS_LOG_LNUM;

		@@ -1945,13 +1983,10 @@ static int ubifs_fill_super(struct super_block sb, void data, int silent)
		if (err)
		goto out_bdi;

		c->vfs_sb = sb;

		sb->s_fs_info = c;
		sb->s_magic = UBIFS_SUPER_MAGIC;
		sb->s_blocksize = UBIFS_BLOCK_SIZE;
		sb->s_blocksize_bits = UBIFS_BLOCK_SHIFT;
		sb->s_dev = c->vi.cdev;
		sb->s_maxbytes = c->max_inode_sz = key_max_inode_size(c);
		if (c->max_inode_sz > MAX_LFS_FILESIZE)
		sb->s_maxbytes = c->max_inode_sz = MAX_LFS_FILESIZE;
		@@ -1996,16 +2031,9 @@ static int ubifs_fill_super(struct super_block sb, void data, int silent)
		static int sb_test(struct super_block sb, void data)
		{
		dev_t *dev = data;
		struct ubifs_info *c = sb->s_fs_info;

		return sb->s_dev == *dev;
		}

		static int sb_set(struct super_block sb, void data)
		{
		dev_t *dev = data;

		sb->s_dev = *dev;
		return 0;
		return c->vi.cdev == *dev;
		}

		static int ubifs_get_sb(struct file_system_type *fs_type, int flags,
		@@ -2033,7 +2061,7 @@ static int ubifs_get_sb(struct file_system_type *fs_type, int flags,

		dbg_gen("opened ubi%d_%d", vi.ubi_num, vi.vol_id);

		sb = sget(fs_type, &sb_test, &sb_set, &vi.cdev);
		sb = sget(fs_type, &sb_test, &set_anon_super, &vi.cdev);
		if (IS_ERR(sb)) {
		err = PTR_ERR(sb);
		goto out_close;
		@@ -2073,16 +2101,11 @@ static int ubifs_get_sb(struct file_system_type *fs_type, int flags,
		return err;
		}

		static void ubifs_kill_sb(struct super_block *sb)
		{
		generic_shutdown_super(sb);
		}

		static struct file_system_type ubifs_fs_type = {
		.name = "ubifs",
		.owner = THIS_MODULE,
		.get_sb = ubifs_get_sb,
		.kill_sb = ubifs_kill_sb
		.kill_sb = kill_anon_super,
		};

		/*