Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2)  * JFFS2 -- Journalling Flash File System, Version 2.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  * Copyright © 2001-2007 Red Hat, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Copyright © 2004-2010 David Woodhouse <dwmw2@infradead.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  * Created by David Woodhouse <dwmw2@infradead.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  * For licensing information, see the file 'LICENCE' in this directory.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #ifndef _JFFS2_FS_SB
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #define _JFFS2_FS_SB
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include <linux/spinlock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include <linux/workqueue.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #include <linux/completion.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #include <linux/mutex.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) #include <linux/timer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) #include <linux/wait.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) #include <linux/list.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) #include <linux/rwsem.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) #define JFFS2_SB_FLAG_RO 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) #define JFFS2_SB_FLAG_SCANNING 2 /* Flash scanning is in progress */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) #define JFFS2_SB_FLAG_BUILDING 4 /* File system building is in progress */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) struct jffs2_inodirty;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) struct jffs2_mount_opts {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 	bool override_compr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 	unsigned int compr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 	/* The size of the reserved pool. The reserved pool is the JFFS2 flash
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 	 * space which may only be used by root cannot be used by the other
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	 * users. This is implemented simply by means of not allowing the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 	 * latter users to write to the file system if the amount if the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	 * available space is less then 'rp_size'. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 	bool set_rp_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	unsigned int rp_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) /* A struct for the overall file system control.  Pointers to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46)    jffs2_sb_info structs are named `c' in the source code.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47)    Nee jffs_control
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) struct jffs2_sb_info {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	struct mtd_info *mtd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	uint32_t highest_ino;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	uint32_t check_ino;		/* *NEXT* inode to be checked */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	unsigned int flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	struct task_struct *gc_task;	/* GC task struct */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 	struct completion gc_thread_start; /* GC thread start completion */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	struct completion gc_thread_exit; /* GC thread exit completion port */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	struct mutex alloc_sem;		/* Used to protect all the following
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 					   fields, and also to protect against
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 					   out-of-order writing of nodes. And GC. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	uint32_t cleanmarker_size;	/* Size of an _inline_ CLEANMARKER
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 					 (i.e. zero for OOB CLEANMARKER */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	uint32_t flash_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	uint32_t used_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	uint32_t dirty_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 	uint32_t wasted_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	uint32_t free_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	uint32_t erasing_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	uint32_t bad_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	uint32_t sector_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	uint32_t unchecked_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	uint32_t nr_free_blocks;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	uint32_t nr_erasing_blocks;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	/* Number of free blocks there must be before we... */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 	uint8_t resv_blocks_write;	/* ... allow a normal filesystem write */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 	uint8_t resv_blocks_deletion;	/* ... allow a normal filesystem deletion */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	uint8_t resv_blocks_gctrigger;	/* ... wake up the GC thread */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	uint8_t resv_blocks_gcbad;	/* ... pick a block from the bad_list to GC */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 	uint8_t resv_blocks_gcmerge;	/* ... merge pages when garbage collecting */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	/* Number of 'very dirty' blocks before we trigger immediate GC */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 	uint8_t vdirty_blocks_gctrigger;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	uint32_t nospc_dirty_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	uint32_t nr_blocks;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	struct jffs2_eraseblock *blocks;	/* The whole array of blocks. Used for getting blocks
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 						 * from the offset (blocks[ofs / sector_size]) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	struct jffs2_eraseblock *nextblock;	/* The block we're currently filling */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 	struct jffs2_eraseblock *gcblock;	/* The block we're currently garbage-collecting */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	struct list_head clean_list;		/* Blocks 100% full of clean data */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 	struct list_head very_dirty_list;	/* Blocks with lots of dirty space */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 	struct list_head dirty_list;		/* Blocks with some dirty space */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	struct list_head erasable_list;		/* Blocks which are completely dirty, and need erasing */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	struct list_head erasable_pending_wbuf_list;	/* Blocks which need erasing but only after the current wbuf is flushed */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	struct list_head erasing_list;		/* Blocks which are currently erasing */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	struct list_head erase_checking_list;	/* Blocks which are being checked and marked */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	struct list_head erase_pending_list;	/* Blocks which need erasing now */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	struct list_head erase_complete_list;	/* Blocks which are erased and need the clean marker written to them */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	struct list_head free_list;		/* Blocks which are free and ready to be used */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	struct list_head bad_list;		/* Bad blocks. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	struct list_head bad_used_list;		/* Bad blocks with valid data in. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	spinlock_t erase_completion_lock;	/* Protect free_list and erasing_list
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 						   against erase completion handler */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	wait_queue_head_t erase_wait;		/* For waiting for erases to complete */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	wait_queue_head_t inocache_wq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 	int inocache_hashsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	struct jffs2_inode_cache **inocache_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	spinlock_t inocache_lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	/* Sem to allow jffs2_garbage_collect_deletion_dirent to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	   drop the erase_completion_lock while it's holding a pointer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 	   to an obsoleted node. I don't like this. Alternatives welcomed. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	struct mutex erase_free_sem;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	uint32_t wbuf_pagesize; /* 0 for NOR and other flashes with no wbuf */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) #ifdef CONFIG_JFFS2_FS_WBUF_VERIFY
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	unsigned char *wbuf_verify; /* read-back buffer for verification */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) #ifdef CONFIG_JFFS2_FS_WRITEBUFFER
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	unsigned char *wbuf; /* Write-behind buffer for NAND flash */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	uint32_t wbuf_ofs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	uint32_t wbuf_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 	struct jffs2_inodirty *wbuf_inodes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	struct rw_semaphore wbuf_sem;	/* Protects the write buffer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	struct delayed_work wbuf_dwork; /* write-buffer write-out work */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	unsigned char *oobbuf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	int oobavail; /* How many bytes are available for JFFS2 in OOB */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	struct jffs2_summary *summary;		/* Summary information */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	struct jffs2_mount_opts mount_opts;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) #ifdef CONFIG_JFFS2_FS_XATTR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) #define XATTRINDEX_HASHSIZE	(57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	uint32_t highest_xid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 	uint32_t highest_xseqno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	struct list_head xattrindex[XATTRINDEX_HASHSIZE];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	struct list_head xattr_unchecked;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	struct list_head xattr_dead_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	struct jffs2_xattr_ref *xref_dead_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	struct jffs2_xattr_ref *xref_temp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	struct rw_semaphore xattr_sem;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	uint32_t xdatum_mem_usage;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 	uint32_t xdatum_mem_threshold;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	/* OS-private pointer for getting back to master superblock info */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	void *os_priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) #endif /* _JFFS2_FS_SB */