diff options
Diffstat (limited to 'include/linux/fs.h')
-rw-r--r-- | include/linux/fs.h | 152 |
1 files changed, 45 insertions, 107 deletions
diff --git a/include/linux/fs.h b/include/linux/fs.h index 6e765d28841b..c3f46e499dd0 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -48,6 +48,7 @@ struct cred; struct swap_info_struct; struct seq_file; struct workqueue_struct; +struct iov_iter; extern void __init inode_init(void); extern void __init inode_init_early(void); @@ -125,6 +126,8 @@ typedef void (dio_iodone_t)(struct kiocb *iocb, loff_t offset, /* File needs atomic accesses to f_pos */ #define FMODE_ATOMIC_POS ((__force fmode_t)0x8000) +/* Write access to underlying fs */ +#define FMODE_WRITER ((__force fmode_t)0x10000) /* File was opened by fanotify and shouldn't generate fanotify events */ #define FMODE_NONOTIFY ((__force fmode_t)0x1000000) @@ -293,38 +296,6 @@ struct page; struct address_space; struct writeback_control; -struct iov_iter { - const struct iovec *iov; - unsigned long nr_segs; - size_t iov_offset; - size_t count; -}; - -size_t iov_iter_copy_from_user_atomic(struct page *page, - struct iov_iter *i, unsigned long offset, size_t bytes); -size_t iov_iter_copy_from_user(struct page *page, - struct iov_iter *i, unsigned long offset, size_t bytes); -void iov_iter_advance(struct iov_iter *i, size_t bytes); -int iov_iter_fault_in_readable(struct iov_iter *i, size_t bytes); -size_t iov_iter_single_seg_count(const struct iov_iter *i); - -static inline void iov_iter_init(struct iov_iter *i, - const struct iovec *iov, unsigned long nr_segs, - size_t count, size_t written) -{ - i->iov = iov; - i->nr_segs = nr_segs; - i->iov_offset = 0; - i->count = count + written; - - iov_iter_advance(i, written); -} - -static inline size_t iov_iter_count(struct iov_iter *i) -{ - return i->count; -} - /* * "descriptor" for what we're up to with a read. * This allows us to use the same read code yet @@ -383,7 +354,7 @@ struct address_space_operations { int (*migratepage) (struct address_space *, struct page *, struct page *, enum migrate_mode); int (*launder_page) (struct page *); - int (*is_partially_uptodate) (struct page *, read_descriptor_t *, + int (*is_partially_uptodate) (struct page *, unsigned long, unsigned long); void (*is_dirty_writeback) (struct page *, bool *, bool *); int (*error_remove_page)(struct address_space *, struct page *); @@ -419,6 +390,7 @@ struct address_space { 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 */ + unsigned long nrshadows; /* number of shadow entries */ pgoff_t writeback_index;/* writeback starts here */ const struct address_space_operations *a_ops; /* methods */ unsigned long flags; /* error bits/gfp mask */ @@ -769,9 +741,6 @@ static inline int ra_has_index(struct file_ra_state *ra, pgoff_t index) index < ra->start + ra->size); } -#define FILE_MNT_WRITE_TAKEN 1 -#define FILE_MNT_WRITE_RELEASED 2 - struct file { union { struct llist_node fu_llist; @@ -809,9 +778,6 @@ struct file { struct list_head f_tfile_llink; #endif /* #ifdef CONFIG_EPOLL */ struct address_space *f_mapping; -#ifdef CONFIG_DEBUG_WRITECOUNT - unsigned long f_mnt_write_state; -#endif } __attribute__((aligned(4))); /* lest something weird decides that 2 is OK */ struct file_handle { @@ -829,49 +795,6 @@ static inline struct file *get_file(struct file *f) #define fput_atomic(x) atomic_long_add_unless(&(x)->f_count, -1, 1) #define file_count(x) atomic_long_read(&(x)->f_count) -#ifdef CONFIG_DEBUG_WRITECOUNT -static inline void file_take_write(struct file *f) -{ - WARN_ON(f->f_mnt_write_state != 0); - f->f_mnt_write_state = FILE_MNT_WRITE_TAKEN; -} -static inline void file_release_write(struct file *f) -{ - f->f_mnt_write_state |= FILE_MNT_WRITE_RELEASED; -} -static inline void file_reset_write(struct file *f) -{ - f->f_mnt_write_state = 0; -} -static inline void file_check_state(struct file *f) -{ - /* - * At this point, either both or neither of these bits - * should be set. - */ - WARN_ON(f->f_mnt_write_state == FILE_MNT_WRITE_TAKEN); - WARN_ON(f->f_mnt_write_state == FILE_MNT_WRITE_RELEASED); -} -static inline int file_check_writeable(struct file *f) -{ - if (f->f_mnt_write_state == FILE_MNT_WRITE_TAKEN) - return 0; - printk(KERN_WARNING "writeable file with no " - "mnt_want_write()\n"); - WARN_ON(1); - return -EINVAL; -} -#else /* !CONFIG_DEBUG_WRITECOUNT */ -static inline void file_take_write(struct file *filp) {} -static inline void file_release_write(struct file *filp) {} -static inline void file_reset_write(struct file *filp) {} -static inline void file_check_state(struct file *filp) {} -static inline int file_check_writeable(struct file *filp) -{ - return 0; -} -#endif /* CONFIG_DEBUG_WRITECOUNT */ - #define MAX_NON_LFS ((1UL<<31) - 1) /* Page cache limit. The filesystems should put that into their s_maxbytes @@ -892,6 +815,7 @@ static inline int file_check_writeable(struct file *filp) #define FL_SLEEP 128 /* A blocking lock */ #define FL_DOWNGRADE_PENDING 256 /* Lease is being downgraded */ #define FL_UNLOCK_PENDING 512 /* Lease is being broken */ +#define FL_OFDLCK 1024 /* lock is "owned" by struct file */ /* * Special return value from posix_lock_file() and vfs_lock_file() for @@ -996,12 +920,12 @@ struct file_lock { extern void send_sigio(struct fown_struct *fown, int fd, int band); #ifdef CONFIG_FILE_LOCKING -extern int fcntl_getlk(struct file *, struct flock __user *); +extern int fcntl_getlk(struct file *, unsigned int, struct flock __user *); extern int fcntl_setlk(unsigned int, struct file *, unsigned int, struct flock __user *); #if BITS_PER_LONG == 32 -extern int fcntl_getlk64(struct file *, struct flock64 __user *); +extern int fcntl_getlk64(struct file *, unsigned int, struct flock64 __user *); extern int fcntl_setlk64(unsigned int, struct file *, unsigned int, struct flock64 __user *); #endif @@ -1016,7 +940,7 @@ extern struct file_lock * locks_alloc_lock(void); extern void locks_copy_lock(struct file_lock *, struct file_lock *); extern void __locks_copy_lock(struct file_lock *, const struct file_lock *); extern void locks_remove_posix(struct file *, fl_owner_t); -extern void locks_remove_flock(struct file *); +extern void locks_remove_file(struct file *); extern void locks_release_private(struct file_lock *); extern void posix_test_lock(struct file *, struct file_lock *); extern int posix_lock_file(struct file *, struct file_lock *, struct file_lock *); @@ -1034,7 +958,8 @@ extern int lease_modify(struct file_lock **, int); extern int lock_may_read(struct inode *, loff_t start, unsigned long count); extern int lock_may_write(struct inode *, loff_t start, unsigned long count); #else /* !CONFIG_FILE_LOCKING */ -static inline int fcntl_getlk(struct file *file, struct flock __user *user) +static inline int fcntl_getlk(struct file *file, unsigned int cmd, + struct flock __user *user) { return -EINVAL; } @@ -1046,7 +971,8 @@ static inline int fcntl_setlk(unsigned int fd, struct file *file, } #if BITS_PER_LONG == 32 -static inline int fcntl_getlk64(struct file *file, struct flock64 __user *user) +static inline int fcntl_getlk64(struct file *file, unsigned int cmd, + struct flock64 __user *user) { return -EINVAL; } @@ -1087,7 +1013,7 @@ static inline void locks_remove_posix(struct file *filp, fl_owner_t owner) return; } -static inline void locks_remove_flock(struct file *filp) +static inline void locks_remove_file(struct file *filp) { return; } @@ -1460,7 +1386,7 @@ extern int vfs_symlink(struct inode *, struct dentry *, const char *); extern int vfs_link(struct dentry *, struct inode *, struct dentry *, struct inode **); extern int vfs_rmdir(struct inode *, struct dentry *); extern int vfs_unlink(struct inode *, struct dentry *, struct inode **); -extern int vfs_rename(struct inode *, struct dentry *, struct inode *, struct dentry *, struct inode **); +extern int vfs_rename(struct inode *, struct dentry *, struct inode *, struct dentry *, struct inode **, unsigned int); /* * VFS dentry helper functions. @@ -1571,6 +1497,8 @@ struct inode_operations { int (*mknod) (struct inode *,struct dentry *,umode_t,dev_t); int (*rename) (struct inode *, struct dentry *, struct inode *, struct dentry *); + int (*rename2) (struct inode *, struct dentry *, + struct inode *, struct dentry *, unsigned int); int (*setattr) (struct dentry *, struct iattr *); int (*getattr) (struct vfsmount *mnt, struct dentry *, struct kstat *); int (*setxattr) (struct dentry *, const char *,const void *,size_t,int); @@ -1913,6 +1841,11 @@ extern int current_umask(void); extern void ihold(struct inode * inode); extern void iput(struct inode *); +static inline struct inode *file_inode(struct file *f) +{ + return f->f_inode; +} + /* /sys/fs */ extern struct kobject *fs_kobj; @@ -1922,7 +1855,7 @@ extern struct kobject *fs_kobj; #define FLOCK_VERIFY_WRITE 2 #ifdef CONFIG_FILE_LOCKING -extern int locks_mandatory_locked(struct inode *); +extern int locks_mandatory_locked(struct file *); extern int locks_mandatory_area(int, struct inode *, struct file *, loff_t, size_t); /* @@ -1945,10 +1878,10 @@ static inline int mandatory_lock(struct inode *ino) return IS_MANDLOCK(ino) && __mandatory_lock(ino); } -static inline int locks_verify_locked(struct inode *inode) +static inline int locks_verify_locked(struct file *file) { - if (mandatory_lock(inode)) - return locks_mandatory_locked(inode); + if (mandatory_lock(file_inode(file))) + return locks_mandatory_locked(file); return 0; } @@ -1968,6 +1901,12 @@ static inline int locks_verify_truncate(struct inode *inode, static inline int break_lease(struct inode *inode, unsigned int mode) { + /* + * Since this check is lockless, we must ensure that any refcounts + * taken are done before checking inode->i_flock. Otherwise, we could + * end up racing with tasks trying to set a new lease on this file. + */ + smp_mb(); if (inode->i_flock) return __break_lease(inode, mode, FL_LEASE); return 0; @@ -2003,7 +1942,7 @@ static inline int break_deleg_wait(struct inode **delegated_inode) } #else /* !CONFIG_FILE_LOCKING */ -static inline int locks_mandatory_locked(struct inode *inode) +static inline int locks_mandatory_locked(struct file *file) { return 0; } @@ -2025,7 +1964,7 @@ static inline int mandatory_lock(struct inode *inode) return 0; } -static inline int locks_verify_locked(struct inode *inode) +static inline int locks_verify_locked(struct file *file) { return 0; } @@ -2299,11 +2238,6 @@ static inline bool execute_ok(struct inode *inode) return (inode->i_mode & S_IXUGO) || S_ISDIR(inode->i_mode); } -static inline struct inode *file_inode(struct file *f) -{ - return f->f_inode; -} - static inline void file_start_write(struct file *file) { if (!S_ISREG(file_inode(file)->i_mode)) @@ -2469,16 +2403,13 @@ extern int generic_file_mmap(struct file *, struct vm_area_struct *); extern int generic_file_readonly_mmap(struct file *, struct vm_area_struct *); extern int generic_file_remap_pages(struct vm_area_struct *, unsigned long addr, unsigned long size, pgoff_t pgoff); -extern int file_read_actor(read_descriptor_t * desc, struct page *page, unsigned long offset, unsigned long size); int generic_write_checks(struct file *file, loff_t *pos, size_t *count, int isblk); extern ssize_t generic_file_aio_read(struct kiocb *, const struct iovec *, unsigned long, loff_t); -extern ssize_t __generic_file_aio_write(struct kiocb *, const struct iovec *, unsigned long, - loff_t *); +extern ssize_t __generic_file_aio_write(struct kiocb *, const struct iovec *, unsigned long); extern ssize_t generic_file_aio_write(struct kiocb *, const struct iovec *, unsigned long, loff_t); extern ssize_t generic_file_direct_write(struct kiocb *, const struct iovec *, - unsigned long *, loff_t, loff_t *, size_t, size_t); -extern ssize_t generic_file_buffered_write(struct kiocb *, const struct iovec *, - unsigned long, loff_t, loff_t *, size_t, ssize_t); + unsigned long *, loff_t, size_t, size_t); +extern ssize_t generic_perform_write(struct file *, struct iov_iter *, loff_t); extern ssize_t do_sync_read(struct file *filp, char __user *buf, size_t len, loff_t *ppos); extern ssize_t do_sync_write(struct file *filp, const char __user *buf, size_t len, loff_t *ppos); extern int generic_segment_checks(const struct iovec *iov, @@ -2538,6 +2469,9 @@ enum { /* filesystem does not support filling holes */ DIO_SKIP_HOLES = 0x02, + + /* filesystem can handle aio writes beyond i_size */ + DIO_ASYNC_EXTEND = 0x04, }; void dio_end_io(struct bio *bio, int error); @@ -2560,11 +2494,14 @@ static inline ssize_t blockdev_direct_IO(int rw, struct kiocb *iocb, void inode_dio_wait(struct inode *inode); void inode_dio_done(struct inode *inode); +extern void inode_set_flags(struct inode *inode, unsigned int flags, + unsigned int mask); + extern const struct file_operations generic_ro_fops; #define special_file(m) (S_ISCHR(m)||S_ISBLK(m)||S_ISFIFO(m)||S_ISSOCK(m)) -extern int vfs_readlink(struct dentry *, char __user *, int, const char *); +extern int readlink_copy(char __user *, int, const char *); extern int page_readlink(struct dentry *, char __user *, int); extern void *page_follow_link_light(struct dentry *, struct nameidata *); extern void page_put_link(struct dentry *, struct nameidata *, void *); @@ -2653,6 +2590,7 @@ extern ssize_t simple_read_from_buffer(void __user *to, size_t count, extern ssize_t simple_write_to_buffer(void *to, size_t available, loff_t *ppos, const void __user *from, size_t count); +extern int __generic_file_fsync(struct file *, loff_t, loff_t, int); extern int generic_file_fsync(struct file *, loff_t, loff_t, int); extern int generic_check_addressable(unsigned, u64); |