diff options
Diffstat (limited to 'include/linux/fs.h')
| -rw-r--r-- | include/linux/fs.h | 97 |
1 files changed, 36 insertions, 61 deletions
diff --git a/include/linux/fs.h b/include/linux/fs.h index 34406ed467c3..adce6e1d70c2 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -269,6 +269,7 @@ extern int dir_notify_enable; #include <linux/types.h> #include <linux/kdev_t.h> #include <linux/dcache.h> +#include <linux/namei.h> #include <linux/stat.h> #include <linux/cache.h> #include <linux/kobject.h> @@ -276,7 +277,7 @@ extern int dir_notify_enable; #include <linux/radix-tree.h> #include <linux/prio_tree.h> #include <linux/init.h> -#include <linux/sched.h> +#include <linux/pid.h> #include <linux/mutex.h> #include <asm/atomic.h> @@ -482,21 +483,6 @@ struct block_device { }; /* - * bdev->bd_mutex nesting subclasses for the lock validator: - * - * 0: normal - * 1: 'whole' - * 2: 'partition' - */ -enum bdev_bd_mutex_lock_class -{ - BD_MUTEX_NORMAL, - BD_MUTEX_WHOLE, - BD_MUTEX_PARTITION -}; - - -/* * Radix-tree tags, for tagging dirty and writeback pages within the pagecache * radix trees */ @@ -543,19 +529,22 @@ struct inode { struct list_head i_dentry; unsigned long i_ino; atomic_t i_count; - umode_t i_mode; unsigned int i_nlink; uid_t i_uid; gid_t i_gid; dev_t i_rdev; + unsigned long i_version; loff_t i_size; +#ifdef __NEED_I_SIZE_ORDERED + seqcount_t i_size_seqcount; +#endif struct timespec i_atime; struct timespec i_mtime; struct timespec i_ctime; unsigned int i_blkbits; - unsigned long i_version; blkcnt_t i_blocks; unsigned short i_bytes; + umode_t i_mode; spinlock_t i_lock; /* i_blocks, i_bytes, maybe i_size */ struct mutex i_mutex; struct rw_semaphore i_alloc_sem; @@ -598,9 +587,6 @@ struct inode { void *i_security; #endif void *i_private; /* fs or device private pointer */ -#ifdef __NEED_I_SIZE_ORDERED - seqcount_t i_size_seqcount; -#endif }; /* @@ -623,6 +609,9 @@ enum inode_i_mutex_lock_class I_MUTEX_QUOTA }; +extern void inode_double_lock(struct inode *inode1, struct inode *inode2); +extern void inode_double_unlock(struct inode *inode1, struct inode *inode2); + /* * NOTE: in a 32bit arch with a preemptable kernel and * an UP compile the i_size_read/write must be atomic @@ -633,7 +622,7 @@ enum inode_i_mutex_lock_class * cmpxchg8b without the need of the lock prefix). For SMP compiles * and 64bit archs it makes no difference if preempt is enabled or not. */ -static inline loff_t i_size_read(struct inode *inode) +static inline loff_t i_size_read(const struct inode *inode) { #if BITS_PER_LONG==32 && defined(CONFIG_SMP) loff_t i_size; @@ -656,7 +645,11 @@ static inline loff_t i_size_read(struct inode *inode) #endif } - +/* + * NOTE: unlike i_size_read(), i_size_write() does need locking around it + * (normally i_mutex), otherwise on 32bit/SMP an update of i_size_seqcount + * can be lost, resulting in subsequent i_size_read() calls spinning forever. + */ static inline void i_size_write(struct inode *inode, loff_t i_size) { #if BITS_PER_LONG==32 && defined(CONFIG_SMP) @@ -672,12 +665,12 @@ static inline void i_size_write(struct inode *inode, loff_t i_size) #endif } -static inline unsigned iminor(struct inode *inode) +static inline unsigned iminor(const struct inode *inode) { return MINOR(inode->i_rdev); } -static inline unsigned imajor(struct inode *inode) +static inline unsigned imajor(const struct inode *inode) { return MAJOR(inode->i_rdev); } @@ -719,8 +712,9 @@ struct file { struct list_head fu_list; struct rcu_head fu_rcuhead; } f_u; - struct dentry *f_dentry; - struct vfsmount *f_vfsmnt; + struct path f_path; +#define f_dentry f_path.dentry +#define f_vfsmnt f_path.mnt const struct file_operations *f_op; atomic_t f_count; unsigned int f_flags; @@ -970,36 +964,13 @@ enum { #define vfs_check_frozen(sb, level) \ wait_event((sb)->s_wait_unfrozen, ((sb)->s_frozen < (level))) -static inline void get_fs_excl(void) -{ - atomic_inc(¤t->fs_excl); -} - -static inline void put_fs_excl(void) -{ - atomic_dec(¤t->fs_excl); -} - -static inline int has_fs_excl(void) -{ - return atomic_read(¤t->fs_excl); -} +#define get_fs_excl() atomic_inc(¤t->fs_excl) +#define put_fs_excl() atomic_dec(¤t->fs_excl) +#define has_fs_excl() atomic_read(¤t->fs_excl) - -/* - * Superblock locking. - */ -static inline void lock_super(struct super_block * sb) -{ - get_fs_excl(); - mutex_lock(&sb->s_lock); -} - -static inline void unlock_super(struct super_block * sb) -{ - put_fs_excl(); - mutex_unlock(&sb->s_lock); -} +/* not quite ready to be deprecated, but... */ +extern void lock_super(struct super_block *); +extern void unlock_super(struct super_block *); /* * VFS helper functions.. @@ -1255,7 +1226,7 @@ extern void touch_atime(struct vfsmount *mnt, struct dentry *dentry); static inline void file_accessed(struct file *file) { if (!(file->f_flags & O_NOATIME)) - touch_atime(file->f_vfsmnt, file->f_dentry); + touch_atime(file->f_path.mnt, file->f_path.dentry); } int sync_inode(struct inode *inode, struct writeback_control *wbc); @@ -1497,7 +1468,9 @@ extern char * getname(const char __user *); extern void __init vfs_caches_init_early(void); extern void __init vfs_caches_init(unsigned long); -#define __getname() kmem_cache_alloc(names_cachep, SLAB_KERNEL) +extern struct kmem_cache *names_cachep; + +#define __getname() kmem_cache_alloc(names_cachep, GFP_KERNEL) #define __putname(name) kmem_cache_free(names_cachep, (void *)(name)) #ifndef CONFIG_AUDITSYSCALL #define putname(name) __putname(name) @@ -1513,7 +1486,6 @@ extern void bd_set_size(struct block_device *, loff_t size); extern void bd_forget(struct inode *inode); extern void bdput(struct block_device *); extern struct block_device *open_by_devnum(dev_t, unsigned); -extern struct block_device *open_partition_by_devnum(dev_t, unsigned); extern const struct address_space_operations def_blk_aops; #else static inline void bd_forget(struct inode *inode) {} @@ -1531,7 +1503,6 @@ extern int blkdev_driver_ioctl(struct inode *inode, struct file *file, extern long compat_blkdev_ioctl(struct file *, unsigned, unsigned long); extern int blkdev_get(struct block_device *, mode_t, unsigned); extern int blkdev_put(struct block_device *); -extern int blkdev_put_partition(struct block_device *); extern int bd_claim(struct block_device *, void *); extern void bd_release(struct block_device *); #ifdef CONFIG_SYSFS @@ -1646,7 +1617,7 @@ static inline void put_write_access(struct inode * inode) static inline void allow_write_access(struct file *file) { if (file) - atomic_inc(&file->f_dentry->d_inode->i_writecount); + atomic_inc(&file->f_path.dentry->d_inode->i_writecount); } extern int do_pipe(int *); extern struct file *create_read_pipe(struct file *f); @@ -1705,6 +1676,8 @@ extern void __iget(struct inode * inode); extern void clear_inode(struct inode *); extern void destroy_inode(struct inode *); extern struct inode *new_inode(struct super_block *); +extern int __remove_suid(struct dentry *, int); +extern int should_remove_suid(struct dentry *); extern int remove_suid(struct dentry *); extern void remove_dquot_ref(struct super_block *, int, struct list_head *); @@ -1751,6 +1724,8 @@ extern ssize_t generic_file_splice_read(struct file *, loff_t *, struct pipe_inode_info *, size_t, unsigned int); extern ssize_t generic_file_splice_write(struct pipe_inode_info *, struct file *, loff_t *, size_t, unsigned int); +extern ssize_t generic_file_splice_write_nolock(struct pipe_inode_info *, + struct file *, loff_t *, size_t, unsigned int); extern ssize_t generic_splice_sendpage(struct pipe_inode_info *pipe, struct file *out, loff_t *, size_t len, unsigned int flags); extern long do_splice_direct(struct file *in, loff_t *ppos, struct file *out, |