diff options
Diffstat (limited to 'fs/jffs2/jffs2_fs_sb.h')
| -rw-r--r-- | fs/jffs2/jffs2_fs_sb.h | 56 |
1 files changed, 42 insertions, 14 deletions
diff --git a/fs/jffs2/jffs2_fs_sb.h b/fs/jffs2/jffs2_fs_sb.h index b98594992ee..413ef89c2d1 100644 --- a/fs/jffs2/jffs2_fs_sb.h +++ b/fs/jffs2/jffs2_fs_sb.h @@ -1,4 +1,14 @@ -/* $Id: jffs2_fs_sb.h,v 1.54 2005/09/21 13:37:34 dedekind Exp $ */ +/* + * 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 @@ -7,7 +17,7 @@ #include <linux/spinlock.h> #include <linux/workqueue.h> #include <linux/completion.h> -#include <asm/semaphore.h> +#include <linux/mutex.h> #include <linux/timer.h> #include <linux/wait.h> #include <linux/list.h> @@ -19,6 +29,18 @@ 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 @@ -35,7 +57,7 @@ struct jffs2_sb_info { struct completion gc_thread_start; /* GC thread start completion */ struct completion gc_thread_exit; /* GC thread exit completion port */ - struct semaphore alloc_sem; /* Used to protect all the following + 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 @@ -60,6 +82,8 @@ struct jffs2_sb_info { 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; @@ -76,6 +100,7 @@ struct jffs2_sb_info { 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 */ @@ -87,34 +112,37 @@ struct jffs2_sb_info { 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 semaphore erase_free_sem; + 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 - /* Write-behind buffer for NAND flash */ - unsigned char *wbuf; - unsigned char *oobbuf; + 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 */ - /* Information about out-of-band area usage... */ - struct nand_ecclayout *ecclayout; - uint32_t badblock_pos; - uint32_t fsdata_pos; - uint32_t fsdata_len; + struct delayed_work wbuf_dwork; /* write-buffer write-out work */ + int wbuf_queued; /* non-zero delayed work is queued */ + spinlock_t wbuf_dwork_lock; /* protects wbuf_dwork and and wbuf_queued */ + + 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) @@ -133,4 +161,4 @@ struct jffs2_sb_info { void *os_priv; }; -#endif /* _JFFS2_FB_SB */ +#endif /* _JFFS2_FS_SB */ |