Adding upstream version 4.19.249.upstream/4.19.249upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 162 insertions, 0 deletions

diff --git a/fs/jffs2/jffs2_fs_sb.h b/fs/jffs2/jffs2_fs_sb.h
new file mode 100644
index 000000000..778275f48
--- /dev/null
+++ b/fs/jffs2/jffs2_fs_sb.h
@@ -0,0 +1,162 @@
+/*
+ * JFFS2 -- Journalling Flash File System, Version 2.
+ *
+ * Copyright © 2001-2007 Red Hat, Inc.
+ * Copyright © 2004-2010 David Woodhouse <dwmw2@infradead.org>
+ *
+ * Created by David Woodhouse <dwmw2@infradead.org>
+ *
+ * For licensing information, see the file 'LICENCE' in this directory.
+ *
+ */
+
+#ifndef _JFFS2_FS_SB
+#define _JFFS2_FS_SB
+
+#include <linux/types.h>
+#include <linux/spinlock.h>
+#include <linux/workqueue.h>
+#include <linux/completion.h>
+#include <linux/mutex.h>
+#include <linux/timer.h>
+#include <linux/wait.h>
+#include <linux/list.h>
+#include <linux/rwsem.h>
+
+#define JFFS2_SB_FLAG_RO 1
+#define JFFS2_SB_FLAG_SCANNING 2 /* Flash scanning is in progress */
+#define JFFS2_SB_FLAG_BUILDING 4 /* File system building is in progress */
+
+struct jffs2_inodirty;
+
+struct jffs2_mount_opts {
+	bool override_compr;
+	unsigned int compr;
+
+	/* The size of the reserved pool. The reserved pool is the JFFS2 flash
+	 * space which may only be used by root cannot be used by the other
+	 * users. This is implemented simply by means of not allowing the
+	 * latter users to write to the file system if the amount if the
+	 * available space is less then 'rp_size'. */
+	unsigned int rp_size;
+};
+
+/* A struct for the overall file system control.  Pointers to
+   jffs2_sb_info structs are named `c' in the source code.
+   Nee jffs_control
+*/
+struct jffs2_sb_info {
+	struct mtd_info *mtd;
+
+	uint32_t highest_ino;
+	uint32_t check_ino;		/* *NEXT* inode to be checked */
+
+	unsigned int flags;
+
+	struct task_struct *gc_task;	/* GC task struct */
+	struct completion gc_thread_start; /* GC thread start completion */
+	struct completion gc_thread_exit; /* GC thread exit completion port */
+
+	struct mutex alloc_sem;		/* Used to protect all the following
+					   fields, and also to protect against
+					   out-of-order writing of nodes. And GC. */
+	uint32_t cleanmarker_size;	/* Size of an _inline_ CLEANMARKER
+					 (i.e. zero for OOB CLEANMARKER */
+
+	uint32_t flash_size;
+	uint32_t used_size;
+	uint32_t dirty_size;
+	uint32_t wasted_size;
+	uint32_t free_size;
+	uint32_t erasing_size;
+	uint32_t bad_size;
+	uint32_t sector_size;
+	uint32_t unchecked_size;
+
+	uint32_t nr_free_blocks;
+	uint32_t nr_erasing_blocks;
+
+	/* Number of free blocks there must be before we... */
+	uint8_t resv_blocks_write;	/* ... allow a normal filesystem write */
+	uint8_t resv_blocks_deletion;	/* ... allow a normal filesystem deletion */
+	uint8_t resv_blocks_gctrigger;	/* ... wake up the GC thread */
+	uint8_t resv_blocks_gcbad;	/* ... pick a block from the bad_list to GC */
+	uint8_t resv_blocks_gcmerge;	/* ... merge pages when garbage collecting */
+	/* Number of 'very dirty' blocks before we trigger immediate GC */
+	uint8_t vdirty_blocks_gctrigger;
+
+	uint32_t nospc_dirty_size;
+
+	uint32_t nr_blocks;
+	struct jffs2_eraseblock *blocks;	/* The whole array of blocks. Used for getting blocks
+						 * from the offset (blocks[ofs / sector_size]) */
+	struct jffs2_eraseblock *nextblock;	/* The block we're currently filling */
+
+	struct jffs2_eraseblock *gcblock;	/* The block we're currently garbage-collecting */
+
+	struct list_head clean_list;		/* Blocks 100% full of clean data */
+	struct list_head very_dirty_list;	/* Blocks with lots of dirty space */
+	struct list_head dirty_list;		/* Blocks with some dirty space */
+	struct list_head erasable_list;		/* Blocks which are completely dirty, and need erasing */
+	struct list_head erasable_pending_wbuf_list;	/* Blocks which need erasing but only after the current wbuf is flushed */
+	struct list_head erasing_list;		/* Blocks which are currently erasing */
+	struct list_head erase_checking_list;	/* Blocks which are being checked and marked */
+	struct list_head erase_pending_list;	/* Blocks which need erasing now */
+	struct list_head erase_complete_list;	/* Blocks which are erased and need the clean marker written to them */
+	struct list_head free_list;		/* Blocks which are free and ready to be used */
+	struct list_head bad_list;		/* Bad blocks. */
+	struct list_head bad_used_list;		/* Bad blocks with valid data in. */
+
+	spinlock_t erase_completion_lock;	/* Protect free_list and erasing_list
+						   against erase completion handler */
+	wait_queue_head_t erase_wait;		/* For waiting for erases to complete */
+
+	wait_queue_head_t inocache_wq;
+	int inocache_hashsize;
+	struct jffs2_inode_cache **inocache_list;
+	spinlock_t inocache_lock;
+
+	/* Sem to allow jffs2_garbage_collect_deletion_dirent to
+	   drop the erase_completion_lock while it's holding a pointer
+	   to an obsoleted node. I don't like this. Alternatives welcomed. */
+	struct mutex erase_free_sem;
+
+	uint32_t wbuf_pagesize; /* 0 for NOR and other flashes with no wbuf */
+
+#ifdef CONFIG_JFFS2_FS_WBUF_VERIFY
+	unsigned char *wbuf_verify; /* read-back buffer for verification */
+#endif
+#ifdef CONFIG_JFFS2_FS_WRITEBUFFER
+	unsigned char *wbuf; /* Write-behind buffer for NAND flash */
+	uint32_t wbuf_ofs;
+	uint32_t wbuf_len;
+	struct jffs2_inodirty *wbuf_inodes;
+	struct rw_semaphore wbuf_sem;	/* Protects the write buffer */
+
+	struct delayed_work wbuf_dwork; /* write-buffer write-out work */
+
+	unsigned char *oobbuf;
+	int oobavail; /* How many bytes are available for JFFS2 in OOB */
+#endif
+
+	struct jffs2_summary *summary;		/* Summary information */
+	struct jffs2_mount_opts mount_opts;
+
+#ifdef CONFIG_JFFS2_FS_XATTR
+#define XATTRINDEX_HASHSIZE	(57)
+	uint32_t highest_xid;
+	uint32_t highest_xseqno;
+	struct list_head xattrindex[XATTRINDEX_HASHSIZE];
+	struct list_head xattr_unchecked;
+	struct list_head xattr_dead_list;
+	struct jffs2_xattr_ref *xref_dead_list;
+	struct jffs2_xattr_ref *xref_temp;
+	struct rw_semaphore xattr_sem;
+	uint32_t xdatum_mem_usage;
+	uint32_t xdatum_mem_threshold;
+#endif
+	/* OS-private pointer for getting back to master superblock info */
+	void *os_priv;
+};
+
+#endif /* _JFFS2_FS_SB */