diff options
Diffstat (limited to 'fs/ubifs/ubifs.h')
| -rw-r--r-- | fs/ubifs/ubifs.h | 540 |
1 files changed, 1 insertions, 539 deletions
diff --git a/fs/ubifs/ubifs.h b/fs/ubifs/ubifs.h index 5c5a82637e..22b24a1161 100644 --- a/fs/ubifs/ubifs.h +++ b/fs/ubifs/ubifs.h @@ -42,6 +42,7 @@ #include <linux/math64.h> #include <linux/rbtree.h> #include <linux/mtd/ubi.h> +#include <linux/pagemap.h> #include <asm/atomic.h> #include <asm-generic/atomic-long.h> #include "ubifs-media.h" @@ -96,550 +97,11 @@ void *kmemdup(const void *src, size_t len, gfp_t gfp); /* uapi/linux/limits.h */ #define XATTR_LIST_MAX 65536 /* size of extended attribute namelist (64k) */ -#ifndef __BAREBOX__ -/* linux/include/time.h */ -#define NSEC_PER_SEC 1000000000L -#define get_seconds() 0 -#define CURRENT_TIME_SEC ((struct timespec) { get_seconds(), 0 }) - -struct timespec { - time_t tv_sec; /* seconds */ - long tv_nsec; /* nanoseconds */ -}; - -static struct timespec current_fs_time(struct super_block *sb) -{ - struct timespec now; - now.tv_sec = 0; - now.tv_nsec = 0; - return now; -}; - -/* linux/include/dcache.h */ - -/* - * "quick string" -- eases parameter passing, but more importantly - * saves "metadata" about the string (ie length and the hash). - * - * hash comes first so it snuggles against d_parent in the - * dentry. - */ -struct qstr { - unsigned int hash; - unsigned int len; -#ifndef __BAREBOX__ - const char *name; -#else - char *name; -#endif -}; - -/* include/linux/fs.h */ - -/* Possible states of 'frozen' field */ -enum { - SB_UNFROZEN = 0, /* FS is unfrozen */ - SB_FREEZE_WRITE = 1, /* Writes, dir ops, ioctls frozen */ - SB_FREEZE_PAGEFAULT = 2, /* Page faults stopped as well */ - SB_FREEZE_FS = 3, /* For internal FS use (e.g. to stop - * internal threads if needed) */ - SB_FREEZE_COMPLETE = 4, /* ->freeze_fs finished successfully */ -}; - -#define SB_FREEZE_LEVELS (SB_FREEZE_COMPLETE - 1) - -struct sb_writers { -#ifndef __BAREBOX__ - /* Counters for counting writers at each level */ - struct percpu_counter counter[SB_FREEZE_LEVELS]; -#endif - wait_queue_head_t wait; /* queue for waiting for - writers / faults to finish */ - int frozen; /* Is sb frozen? */ - wait_queue_head_t wait_unfrozen; /* queue for waiting for - sb to be thawed */ -#ifdef CONFIG_DEBUG_LOCK_ALLOC - struct lockdep_map lock_map[SB_FREEZE_LEVELS]; -#endif -}; - -struct address_space { - struct inode *host; /* owner: inode, block_device */ -#ifndef __BAREBOX__ - struct radix_tree_root page_tree; /* radix tree of all pages */ -#endif - spinlock_t tree_lock; /* and lock protecting it */ - unsigned int i_mmap_writable;/* count VM_SHARED mappings */ - struct rb_root i_mmap; /* tree of private and shared mappings */ - struct list_head i_mmap_nonlinear;/*list VM_NONLINEAR mappings */ - struct mutex i_mmap_mutex; /* protect tree, count, list */ - /* Protected by tree_lock together with the radix tree */ - unsigned long nrpages; /* number of total pages */ - pgoff_t writeback_index;/* writeback starts here */ - const struct address_space_operations *a_ops; /* methods */ - unsigned long flags; /* error bits/gfp mask */ -#ifndef __BAREBOX__ - struct backing_dev_info *backing_dev_info; /* device readahead, etc */ -#endif - spinlock_t private_lock; /* for use by the address_space */ - struct list_head private_list; /* ditto */ - void *private_data; /* ditto */ -} __attribute__((aligned(sizeof(long)))); - -/* - * Keep mostly read-only and often accessed (especially for - * the RCU path lookup and 'stat' data) fields at the beginning - * of the 'struct inode' - */ -struct inode { - umode_t i_mode; - unsigned short i_opflags; - kuid_t i_uid; - kgid_t i_gid; - unsigned int i_flags; - -#ifdef CONFIG_FS_POSIX_ACL - struct posix_acl *i_acl; - struct posix_acl *i_default_acl; -#endif - - const struct inode_operations *i_op; - struct super_block *i_sb; - struct address_space *i_mapping; - -#ifdef CONFIG_SECURITY - void *i_security; -#endif - - /* Stat data, not accessed from path walking */ - unsigned long i_ino; - /* - * Filesystems may only read i_nlink directly. They shall use the - * following functions for modification: - * - * (set|clear|inc|drop)_nlink - * inode_(inc|dec)_link_count - */ - union { - const unsigned int i_nlink; - unsigned int __i_nlink; - }; - dev_t i_rdev; - loff_t i_size; - struct timespec i_atime; - struct timespec i_mtime; - struct timespec i_ctime; - spinlock_t i_lock; /* i_blocks, i_bytes, maybe i_size */ - unsigned short i_bytes; - unsigned int i_blkbits; - blkcnt_t i_blocks; - -#ifdef __NEED_I_SIZE_ORDERED - seqcount_t i_size_seqcount; -#endif - - /* Misc */ - unsigned long i_state; - struct mutex i_mutex; - - unsigned long dirtied_when; /* jiffies of first dirtying */ - - struct hlist_node i_hash; - struct list_head i_wb_list; /* backing dev IO list */ - struct list_head i_lru; /* inode LRU list */ - struct list_head i_sb_list; - union { - struct hlist_head i_dentry; - struct rcu_head i_rcu; - }; - u64 i_version; - atomic_t i_count; - atomic_t i_dio_count; - atomic_t i_writecount; - const struct file_operations *i_fop; /* former ->i_op->default_file_ops */ - struct file_lock *i_flock; - struct address_space i_data; -#ifdef CONFIG_QUOTA - struct dquot *i_dquot[MAXQUOTAS]; -#endif - struct list_head i_devices; - union { - struct pipe_inode_info *i_pipe; - struct block_device *i_bdev; - struct cdev *i_cdev; - }; - - __u32 i_generation; - -#ifdef CONFIG_FSNOTIFY - __u32 i_fsnotify_mask; /* all events this inode cares about */ - struct hlist_head i_fsnotify_marks; -#endif - -#ifdef CONFIG_IMA - atomic_t i_readcount; /* struct files open RO */ -#endif - void *i_private; /* fs or device private pointer */ -}; -#endif - -struct super_operations { - struct inode *(*alloc_inode)(struct super_block *sb); - void (*destroy_inode)(struct inode *); - - void (*dirty_inode) (struct inode *, int flags); -#ifndef __BAREBOX__ - int (*write_inode) (struct inode *, struct writeback_control *wbc); -#endif - int (*drop_inode) (struct inode *); - void (*evict_inode) (struct inode *); - void (*put_super) (struct super_block *); - int (*sync_fs)(struct super_block *sb, int wait); - int (*freeze_fs) (struct super_block *); - int (*unfreeze_fs) (struct super_block *); -#ifndef __BAREBOX__ - int (*statfs) (struct dentry *, struct kstatfs *); -#endif - int (*remount_fs) (struct super_block *, int *, char *); - void (*umount_begin) (struct super_block *); - -#ifndef __BAREBOX__ - int (*show_options)(struct seq_file *, struct dentry *); - int (*show_devname)(struct seq_file *, struct dentry *); - int (*show_path)(struct seq_file *, struct dentry *); - int (*show_stats)(struct seq_file *, struct dentry *); -#endif -#ifdef CONFIG_QUOTA - ssize_t (*quota_read)(struct super_block *, int, char *, size_t, loff_t); - ssize_t (*quota_write)(struct super_block *, int, const char *, size_t, loff_t); -#endif - int (*bdev_try_to_free_page)(struct super_block*, struct page*, gfp_t); - long (*nr_cached_objects)(struct super_block *, int); - long (*free_cached_objects)(struct super_block *, long, int); -}; - -#ifndef __BAREBOX__ -struct super_block { - struct list_head s_list; /* Keep this first */ - dev_t s_dev; /* search index; _not_ kdev_t */ - unsigned char s_blocksize_bits; - unsigned long s_blocksize; - loff_t s_maxbytes; /* Max file size */ - struct file_system_type *s_type; - const struct super_operations *s_op; - const struct dquot_operations *dq_op; - const struct quotactl_ops *s_qcop; - const struct export_operations *s_export_op; - unsigned long s_flags; - unsigned long s_magic; - struct dentry *s_root; - struct rw_semaphore s_umount; - int s_count; - atomic_t s_active; -#ifdef CONFIG_SECURITY - void *s_security; -#endif - const struct xattr_handler **s_xattr; - - struct list_head s_inodes; /* all inodes */ -#ifndef __BAREBOX__ - struct hlist_bl_head s_anon; /* anonymous dentries for (nfs) exporting */ -#endif - struct list_head s_mounts; /* list of mounts; _not_ for fs use */ - struct block_device *s_bdev; -#ifndef __BAREBOX__ - struct backing_dev_info *s_bdi; -#endif - struct mtd_info *s_mtd; - struct hlist_node s_instances; -#ifndef __BAREBOX__ - struct quota_info s_dquot; /* Diskquota specific options */ -#endif - - struct sb_writers s_writers; - - char s_id[32]; /* Informational name */ - u8 s_uuid[16]; /* UUID */ - - void *s_fs_info; /* Filesystem private info */ - unsigned int s_max_links; -#ifndef __BAREBOX__ - fmode_t s_mode; -#endif - - /* Granularity of c/m/atime in ns. - Cannot be worse than a second */ - u32 s_time_gran; - - /* - * The next field is for VFS *only*. No filesystems have any business - * even looking at it. You had been warned. - */ - struct mutex s_vfs_rename_mutex; /* Kludge */ - - /* - * Filesystem subtype. If non-empty the filesystem type field - * in /proc/mounts will be "type.subtype" - */ - char *s_subtype; - -#ifndef __BAREBOX__ - /* - * Saved mount options for lazy filesystems using - * generic_show_options() - */ - char __rcu *s_options; -#endif - const struct dentry_operations *s_d_op; /* default d_op for dentries */ - - /* - * Saved pool identifier for cleancache (-1 means none) - */ - int cleancache_poolid; - -#ifndef __BAREBOX__ - struct shrinker s_shrink; /* per-sb shrinker handle */ -#endif - - /* Number of inodes with nlink == 0 but still referenced */ - atomic_long_t s_remove_count; - - /* Being remounted read-only */ - int s_readonly_remount; - - /* AIO completions deferred from interrupt context */ - struct workqueue_struct *s_dio_done_wq; - -#ifndef __BAREBOX__ - /* - * Keep the lru lists last in the structure so they always sit on their - * own individual cachelines. - */ - struct list_lru s_dentry_lru ____cacheline_aligned_in_smp; - struct list_lru s_inode_lru ____cacheline_aligned_in_smp; -#endif - struct rcu_head rcu; -}; - -struct file_system_type { - const char *name; - int fs_flags; -#define FS_REQUIRES_DEV 1 -#define FS_BINARY_MOUNTDATA 2 -#define FS_HAS_SUBTYPE 4 -#define FS_USERNS_MOUNT 8 /* Can be mounted by userns root */ -#define FS_USERNS_DEV_MOUNT 16 /* A userns mount does not imply MNT_NODEV */ -#define FS_RENAME_DOES_D_MOVE 32768 /* FS will handle d_move() during rename() internally. */ - struct dentry *(*mount) (struct file_system_type *, int, - const char *, void *); - void (*kill_sb) (struct super_block *); - struct module *owner; - struct file_system_type * next; - struct hlist_head fs_supers; - -#ifndef __BAREBOX__ - struct lock_class_key s_lock_key; - struct lock_class_key s_umount_key; - struct lock_class_key s_vfs_rename_key; - struct lock_class_key s_writers_key[SB_FREEZE_LEVELS]; - - struct lock_class_key i_lock_key; - struct lock_class_key i_mutex_key; - struct lock_class_key i_mutex_dir_key; -#endif -}; - -/* include/linux/mount.h */ -struct vfsmount { - struct dentry *mnt_root; /* root of the mounted tree */ - struct super_block *mnt_sb; /* pointer to superblock */ - int mnt_flags; -}; - -struct path { - struct vfsmount *mnt; - struct dentry *dentry; -}; - -struct file { - struct path f_path; -#define f_dentry f_path.dentry -#define f_vfsmnt f_path.mnt - const struct file_operations *f_op; - unsigned int f_flags; - loff_t f_pos; - unsigned int f_uid, f_gid; - - u64 f_version; -#ifdef CONFIG_SECURITY - void *f_security; -#endif - /* needed for tty driver, and maybe others */ - void *private_data; - -#ifdef CONFIG_EPOLL - /* Used by fs/eventpoll.c to link all the hooks to this file */ - struct list_head f_ep_links; - spinlock_t f_ep_lock; -#endif /* #ifdef CONFIG_EPOLL */ -#ifdef CONFIG_DEBUG_WRITECOUNT - unsigned long f_mnt_write_state; -#endif -}; -#endif - /* * get_seconds() not really needed in the read-only implmentation */ #define get_seconds() 0 -/* 4k page size */ -#define PAGE_CACHE_SHIFT 12 -#define PAGE_CACHE_SIZE (1 << PAGE_CACHE_SHIFT) - -#ifndef __BAREBOX__ -/* Page cache limit. The filesystems should put that into their s_maxbytes - limits, otherwise bad things can happen in VM. */ -#if BITS_PER_LONG==32 -#define MAX_LFS_FILESIZE (((u64)PAGE_CACHE_SIZE << (BITS_PER_LONG-1))-1) -#elif BITS_PER_LONG==64 -#define MAX_LFS_FILESIZE 0x7fffffffffffffffUL -#endif - -/* - * These are the fs-independent mount-flags: up to 32 flags are supported - */ -#define MS_RDONLY 1 /* Mount read-only */ -#define MS_NOSUID 2 /* Ignore suid and sgid bits */ -#define MS_NODEV 4 /* Disallow access to device special files */ -#define MS_NOEXEC 8 /* Disallow program execution */ -#define MS_SYNCHRONOUS 16 /* Writes are synced at once */ -#define MS_REMOUNT 32 /* Alter flags of a mounted FS */ -#define MS_MANDLOCK 64 /* Allow mandatory locks on an FS */ -#define MS_DIRSYNC 128 /* Directory modifications are synchronous */ -#define MS_NOATIME 1024 /* Do not update access times. */ -#define MS_NODIRATIME 2048 /* Do not update directory access times */ -#define MS_BIND 4096 -#define MS_MOVE 8192 -#define MS_REC 16384 -#define MS_VERBOSE 32768 /* War is peace. Verbosity is silence. - MS_VERBOSE is deprecated. */ -#define MS_SILENT 32768 -#define MS_POSIXACL (1<<16) /* VFS does not apply the umask */ -#define MS_UNBINDABLE (1<<17) /* change to unbindable */ -#define MS_PRIVATE (1<<18) /* change to private */ -#define MS_SLAVE (1<<19) /* change to slave */ -#define MS_SHARED (1<<20) /* change to shared */ -#define MS_RELATIME (1<<21) /* Update atime relative to mtime/ctime. */ -#define MS_KERNMOUNT (1<<22) /* this is a kern_mount call */ -#define MS_I_VERSION (1<<23) /* Update inode I_version field */ -#define MS_ACTIVE (1<<30) -#define MS_NOUSER (1<<31) - -#define I_NEW 8 - -/* Inode flags - they have nothing to superblock flags now */ - -#define S_SYNC 1 /* Writes are synced at once */ -#define S_NOATIME 2 /* Do not update access times */ -#define S_APPEND 4 /* Append-only file */ -#define S_IMMUTABLE 8 /* Immutable file */ -#define S_DEAD 16 /* removed, but still open directory */ -#define S_NOQUOTA 32 /* Inode is not counted to quota */ -#define S_DIRSYNC 64 /* Directory modifications are synchronous */ -#define S_NOCMTIME 128 /* Do not update file c/mtime */ -#define S_SWAPFILE 256 /* Do not truncate: swapon got its bmaps */ -#define S_PRIVATE 512 /* Inode is fs-internal */ - -/* include/linux/stat.h */ - -#define S_IFMT 00170000 -#define S_IFSOCK 0140000 -#define S_IFLNK 0120000 -#define S_IFREG 0100000 -#define S_IFBLK 0060000 -#define S_IFDIR 0040000 -#define S_IFCHR 0020000 -#define S_IFIFO 0010000 -#define S_ISUID 0004000 -#define S_ISGID 0002000 -#define S_ISVTX 0001000 - -/* include/linux/fs.h */ - -/* - * File types - * - * NOTE! These match bits 12..15 of stat.st_mode - * (ie "(i_mode >> 12) & 15"). - */ -#define DT_UNKNOWN 0 -#define DT_FIFO 1 -#define DT_CHR 2 -#define DT_DIR 4 -#define DT_BLK 6 -#define DT_REG 8 -#define DT_LNK 10 -#define DT_SOCK 12 -#define DT_WHT 14 - -#define I_DIRTY_SYNC 1 -#define I_DIRTY_DATASYNC 2 -#define I_DIRTY_PAGES 4 -#define I_NEW 8 -#define I_WILL_FREE 16 -#define I_FREEING 32 -#define I_CLEAR 64 -#define __I_LOCK 7 -#define I_LOCK (1 << __I_LOCK) -#define __I_SYNC 8 -#define I_SYNC (1 << __I_SYNC) - -#define I_DIRTY (I_DIRTY_SYNC | I_DIRTY_DATASYNC | I_DIRTY_PAGES) - -/* linux/include/dcache.h */ - -#define DNAME_INLINE_LEN_MIN 36 - -struct dentry { - unsigned int d_flags; /* protected by d_lock */ - spinlock_t d_lock; /* per dentry lock */ - struct inode *d_inode; /* Where the name belongs to - NULL is - * negative */ - /* - * The next three fields are touched by __d_lookup. Place them here - * so they all fit in a cache line. - */ - struct hlist_node d_hash; /* lookup hash list */ - struct dentry *d_parent; /* parent directory */ - struct qstr d_name; - - struct list_head d_lru; /* LRU list */ - /* - * d_child and d_rcu can share memory - */ - struct list_head d_subdirs; /* our children */ - struct list_head d_alias; /* inode alias list */ - unsigned long d_time; /* used by d_revalidate */ - struct super_block *d_sb; /* The root of the dentry tree */ - void *d_fsdata; /* fs-specific data */ -#ifdef CONFIG_PROFILING - struct dcookie_struct *d_cookie; /* cookie, if any */ -#endif - int d_mounted; - unsigned char d_iname[DNAME_INLINE_LEN_MIN]; /* small names */ -}; -#endif -static inline ino_t parent_ino(struct dentry *dentry) -{ - ino_t res; - - spin_lock(&dentry->d_lock); - res = dentry->d_parent->d_inode->i_ino; - spin_unlock(&dentry->d_lock); - return res; -} - /* debug.c */ #define module_param_named(...) |