/* * 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 */Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp | |
| linus torvalds | linus torvalds | 150 | 36.67% | 2 | 6.06% |
| david woodhouse | david woodhouse | 141 | 34.47% | 14 | 42.42% |
| kaigai kohei | kaigai kohei | 50 | 12.22% | 3 | 9.09% |
| artem bityutskiy | artem bityutskiy | 23 | 5.62% | 4 | 12.12% |
| andres salomon | andres salomon | 16 | 3.91% | 1 | 3.03% |
| daniel drake | daniel drake | 8 | 1.96% | 2 | 6.06% |
| thomas gleixner | thomas gleixner | 7 | 1.71% | 2 | 6.06% |
| ferenc havasi | ferenc havasi | 6 | 1.47% | 1 | 3.03% |
| dave jones | dave jones | 3 | 0.73% | 1 | 3.03% |
| andrew victor | andrew victor | 3 | 0.73% | 1 | 3.03% |
| ingo molnar | ingo molnar | 1 | 0.24% | 1 | 3.03% |
| dan carpenter | dan carpenter | 1 | 0.24% | 1 | 3.03% |
| Total | 409 | 100.00% | 33 | 100.00% |