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authorLinus Torvalds <torvalds@linux-foundation.org>2012-07-23 12:27:27 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-07-23 12:27:27 -0700
commita66d2c8f7ec1284206ca7c14569e2a607583f1e3 (patch)
tree08cf68bcef3559b370843cab8191e5cc0f740bde /include
parenta6be1fcbc57f95bb47ef3c8e4ee3d83731b8f21e (diff)
parent8cae6f7158ec1fa44c8a04a43db7d8020ec60437 (diff)
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Merge branch 'for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull the big VFS changes from Al Viro: "This one is *big* and changes quite a few things around VFS. What's in there: - the first of two really major architecture changes - death to open intents. The former is finally there; it was very long in making, but with Miklos getting through really hard and messy final push in fs/namei.c, we finally have it. Unlike his variant, this one doesn't introduce struct opendata; what we have instead is ->atomic_open() taking preallocated struct file * and passing everything via its fields. Instead of returning struct file *, it returns -E... on error, 0 on success and 1 in "deal with it yourself" case (e.g. symlink found on server, etc.). See comments before fs/namei.c:atomic_open(). That made a lot of goodies finally possible and quite a few are in that pile: ->lookup(), ->d_revalidate() and ->create() do not get struct nameidata * anymore; ->lookup() and ->d_revalidate() get lookup flags instead, ->create() gets "do we want it exclusive" flag. With the introduction of new helper (kern_path_locked()) we are rid of all struct nameidata instances outside of fs/namei.c; it's still visible in namei.h, but not for long. Come the next cycle, declaration will move either to fs/internal.h or to fs/namei.c itself. [me, miklos, hch] - The second major change: behaviour of final fput(). Now we have __fput() done without any locks held by caller *and* not from deep in call stack. That obviously lifts a lot of constraints on the locking in there. Moreover, it's legal now to call fput() from atomic contexts (which has immediately simplified life for aio.c). We also don't need anti-recursion logics in __scm_destroy() anymore. There is a price, though - the damn thing has become partially asynchronous. For fput() from normal process we are guaranteed that pending __fput() will be done before the caller returns to userland, exits or gets stopped for ptrace. For kernel threads and atomic contexts it's done via schedule_work(), so theoretically we might need a way to make sure it's finished; so far only one such place had been found, but there might be more. There's flush_delayed_fput() (do all pending __fput()) and there's __fput_sync() (fput() analog doing __fput() immediately). I hope we won't need them often; see warnings in fs/file_table.c for details. [me, based on task_work series from Oleg merged last cycle] - sync series from Jan - large part of "death to sync_supers()" work from Artem; the only bits missing here are exofs and ext4 ones. As far as I understand, those are going via the exofs and ext4 trees resp.; once they are in, we can put ->write_super() to the rest, along with the thread calling it. - preparatory bits from unionmount series (from dhowells). - assorted cleanups and fixes all over the place, as usual. This is not the last pile for this cycle; there's at least jlayton's ESTALE work and fsfreeze series (the latter - in dire need of fixes, so I'm not sure it'll make the cut this cycle). I'll probably throw symlink/hardlink restrictions stuff from Kees into the next pile, too. Plus there's a lot of misc patches I hadn't thrown into that one - it's large enough as it is..." * 'for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (127 commits) ext4: switch EXT4_IOC_RESIZE_FS to mnt_want_write_file() btrfs: switch btrfs_ioctl_balance() to mnt_want_write_file() switch dentry_open() to struct path, make it grab references itself spufs: shift dget/mntget towards dentry_open() zoran: don't bother with struct file * in zoran_map ecryptfs: don't reinvent the wheels, please - use struct completion don't expose I_NEW inodes via dentry->d_inode tidy up namei.c a bit unobfuscate follow_up() a bit ext3: pass custom EOF to generic_file_llseek_size() ext4: use core vfs llseek code for dir seeks vfs: allow custom EOF in generic_file_llseek code vfs: Avoid unnecessary WB_SYNC_NONE writeback during sys_sync and reorder sync passes vfs: Remove unnecessary flushing of block devices vfs: Make sys_sync writeout also block device inodes vfs: Create function for iterating over block devices vfs: Reorder operations during sys_sync quota: Move quota syncing to ->sync_fs method quota: Split dquot_quota_sync() to writeback and cache flushing part vfs: Move noop_backing_dev_info check from sync into writeback ...
Diffstat (limited to 'include')
-rw-r--r--include/linux/dcache.h4
-rw-r--r--include/linux/file.h3
-rw-r--r--include/linux/fs.h33
-rw-r--r--include/linux/namei.h18
-rw-r--r--include/linux/nfs_xdr.h2
-rw-r--r--include/linux/quota.h2
-rw-r--r--include/linux/quotaops.h8
-rw-r--r--include/linux/sched.h3
-rw-r--r--include/linux/task_work.h18
-rw-r--r--include/linux/tracehook.h2
-rw-r--r--include/linux/types.h9
-rw-r--r--include/net/scm.h1
12 files changed, 53 insertions, 50 deletions
diff --git a/include/linux/dcache.h b/include/linux/dcache.h
index 094789ff3e9f..caa34e50537e 100644
--- a/include/linux/dcache.h
+++ b/include/linux/dcache.h
@@ -128,7 +128,7 @@ struct dentry {
struct rcu_head d_rcu;
} d_u;
struct list_head d_subdirs; /* our children */
- struct list_head d_alias; /* inode alias list */
+ struct hlist_node d_alias; /* inode alias list */
};
/*
@@ -144,7 +144,7 @@ enum dentry_d_lock_class
};
struct dentry_operations {
- int (*d_revalidate)(struct dentry *, struct nameidata *);
+ int (*d_revalidate)(struct dentry *, unsigned int);
int (*d_hash)(const struct dentry *, const struct inode *,
struct qstr *);
int (*d_compare)(const struct dentry *, const struct inode *,
diff --git a/include/linux/file.h b/include/linux/file.h
index 58bf158c53d9..a22408bac0d0 100644
--- a/include/linux/file.h
+++ b/include/linux/file.h
@@ -39,4 +39,7 @@ extern void put_unused_fd(unsigned int fd);
extern void fd_install(unsigned int fd, struct file *file);
+extern void flush_delayed_fput(void);
+extern void __fput_sync(struct file *);
+
#endif /* __LINUX_FILE_H */
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 17fd887c798f..8fabb037a48d 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -826,7 +826,7 @@ struct inode {
struct list_head i_lru; /* inode LRU list */
struct list_head i_sb_list;
union {
- struct list_head i_dentry;
+ struct hlist_head i_dentry;
struct rcu_head i_rcu;
};
u64 i_version;
@@ -1571,7 +1571,7 @@ extern void unlock_super(struct super_block *);
/*
* VFS helper functions..
*/
-extern int vfs_create(struct inode *, struct dentry *, umode_t, struct nameidata *);
+extern int vfs_create(struct inode *, struct dentry *, umode_t, bool);
extern int vfs_mkdir(struct inode *, struct dentry *, umode_t);
extern int vfs_mknod(struct inode *, struct dentry *, umode_t, dev_t);
extern int vfs_symlink(struct inode *, struct dentry *, const char *);
@@ -1666,7 +1666,7 @@ struct file_operations {
};
struct inode_operations {
- struct dentry * (*lookup) (struct inode *,struct dentry *, struct nameidata *);
+ struct dentry * (*lookup) (struct inode *,struct dentry *, unsigned int);
void * (*follow_link) (struct dentry *, struct nameidata *);
int (*permission) (struct inode *, int);
struct posix_acl * (*get_acl)(struct inode *, int);
@@ -1674,7 +1674,7 @@ struct inode_operations {
int (*readlink) (struct dentry *, char __user *,int);
void (*put_link) (struct dentry *, struct nameidata *, void *);
- int (*create) (struct inode *,struct dentry *,umode_t,struct nameidata *);
+ int (*create) (struct inode *,struct dentry *, umode_t, bool);
int (*link) (struct dentry *,struct inode *,struct dentry *);
int (*unlink) (struct inode *,struct dentry *);
int (*symlink) (struct inode *,struct dentry *,const char *);
@@ -1693,6 +1693,9 @@ struct inode_operations {
int (*fiemap)(struct inode *, struct fiemap_extent_info *, u64 start,
u64 len);
int (*update_time)(struct inode *, struct timespec *, int);
+ int (*atomic_open)(struct inode *, struct dentry *,
+ struct file *, unsigned open_flag,
+ umode_t create_mode, int *opened);
} ____cacheline_aligned;
struct seq_file;
@@ -1911,7 +1914,7 @@ void free_anon_bdev(dev_t);
struct super_block *sget(struct file_system_type *type,
int (*test)(struct super_block *,void *),
int (*set)(struct super_block *,void *),
- void *data);
+ int flags, void *data);
extern struct dentry *mount_pseudo(struct file_system_type *, char *,
const struct super_operations *ops,
const struct dentry_operations *dops,
@@ -2057,10 +2060,17 @@ extern long do_sys_open(int dfd, const char __user *filename, int flags,
extern struct file *filp_open(const char *, int, umode_t);
extern struct file *file_open_root(struct dentry *, struct vfsmount *,
const char *, int);
-extern struct file * dentry_open(struct dentry *, struct vfsmount *, int,
- const struct cred *);
+extern struct file * dentry_open(const struct path *, int, const struct cred *);
extern int filp_close(struct file *, fl_owner_t id);
extern char * getname(const char __user *);
+enum {
+ FILE_CREATED = 1,
+ FILE_OPENED = 2
+};
+extern int finish_open(struct file *file, struct dentry *dentry,
+ int (*open)(struct inode *, struct file *),
+ int *opened);
+extern int finish_no_open(struct file *file, struct dentry *dentry);
/* fs/ioctl.c */
@@ -2091,6 +2101,7 @@ extern sector_t blkdev_max_block(struct block_device *bdev);
extern void bd_forget(struct inode *inode);
extern void bdput(struct block_device *);
extern void invalidate_bdev(struct block_device *);
+extern void iterate_bdevs(void (*)(struct block_device *, void *), void *);
extern int sync_blockdev(struct block_device *bdev);
extern void kill_bdev(struct block_device *);
extern struct super_block *freeze_bdev(struct block_device *);
@@ -2112,6 +2123,10 @@ static inline int thaw_bdev(struct block_device *bdev, struct super_block *sb)
{
return 0;
}
+
+static inline void iterate_bdevs(void (*f)(struct block_device *, void *), void *arg)
+{
+}
#endif
extern int sync_filesystem(struct super_block *);
extern const struct file_operations def_blk_fops;
@@ -2438,7 +2453,7 @@ extern loff_t noop_llseek(struct file *file, loff_t offset, int origin);
extern loff_t no_llseek(struct file *file, loff_t offset, int origin);
extern loff_t generic_file_llseek(struct file *file, loff_t offset, int origin);
extern loff_t generic_file_llseek_size(struct file *file, loff_t offset,
- int origin, loff_t maxsize);
+ int origin, loff_t maxsize, loff_t eof);
extern int generic_file_open(struct inode * inode, struct file * filp);
extern int nonseekable_open(struct inode * inode, struct file * filp);
@@ -2560,7 +2575,7 @@ extern int simple_write_end(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned copied,
struct page *page, void *fsdata);
-extern struct dentry *simple_lookup(struct inode *, struct dentry *, struct nameidata *);
+extern struct dentry *simple_lookup(struct inode *, struct dentry *, unsigned int flags);
extern ssize_t generic_read_dir(struct file *, char __user *, size_t, loff_t *);
extern const struct file_operations simple_dir_operations;
extern const struct inode_operations simple_dir_inode_operations;
diff --git a/include/linux/namei.h b/include/linux/namei.h
index ffc02135c483..d2ef8b34b967 100644
--- a/include/linux/namei.h
+++ b/include/linux/namei.h
@@ -7,12 +7,6 @@
struct vfsmount;
-struct open_intent {
- int flags;
- int create_mode;
- struct file *file;
-};
-
enum { MAX_NESTED_LINKS = 8 };
struct nameidata {
@@ -25,11 +19,6 @@ struct nameidata {
int last_type;
unsigned depth;
char *saved_names[MAX_NESTED_LINKS + 1];
-
- /* Intent data */
- union {
- struct open_intent open;
- } intent;
};
/*
@@ -78,13 +67,10 @@ extern int kern_path(const char *, unsigned, struct path *);
extern struct dentry *kern_path_create(int, const char *, struct path *, int);
extern struct dentry *user_path_create(int, const char __user *, struct path *, int);
-extern int kern_path_parent(const char *, struct nameidata *);
+extern struct dentry *kern_path_locked(const char *, struct path *);
extern int vfs_path_lookup(struct dentry *, struct vfsmount *,
const char *, unsigned int, struct path *);
-extern struct file *lookup_instantiate_filp(struct nameidata *nd, struct dentry *dentry,
- int (*open)(struct inode *, struct file *));
-
extern struct dentry *lookup_one_len(const char *, struct dentry *, int);
extern int follow_down_one(struct path *);
@@ -94,6 +80,8 @@ extern int follow_up(struct path *);
extern struct dentry *lock_rename(struct dentry *, struct dentry *);
extern void unlock_rename(struct dentry *, struct dentry *);
+extern void nd_jump_link(struct nameidata *nd, struct path *path);
+
static inline void nd_set_link(struct nameidata *nd, char *path)
{
nd->saved_names[nd->depth] = path;
diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h
index 8aadd90b808a..d3b7c18b18f4 100644
--- a/include/linux/nfs_xdr.h
+++ b/include/linux/nfs_xdr.h
@@ -1374,7 +1374,7 @@ struct nfs_rpc_ops {
int (*readlink)(struct inode *, struct page *, unsigned int,
unsigned int);
int (*create) (struct inode *, struct dentry *,
- struct iattr *, int, struct nfs_open_context *);
+ struct iattr *, int);
int (*remove) (struct inode *, struct qstr *);
void (*unlink_setup) (struct rpc_message *, struct inode *dir);
void (*unlink_rpc_prepare) (struct rpc_task *, struct nfs_unlinkdata *);
diff --git a/include/linux/quota.h b/include/linux/quota.h
index c09fa042b5ea..524ede8a160a 100644
--- a/include/linux/quota.h
+++ b/include/linux/quota.h
@@ -333,7 +333,7 @@ struct quotactl_ops {
int (*quota_on)(struct super_block *, int, int, struct path *);
int (*quota_on_meta)(struct super_block *, int, int);
int (*quota_off)(struct super_block *, int);
- int (*quota_sync)(struct super_block *, int, int);
+ int (*quota_sync)(struct super_block *, int);
int (*get_info)(struct super_block *, int, struct if_dqinfo *);
int (*set_info)(struct super_block *, int, struct if_dqinfo *);
int (*get_dqblk)(struct super_block *, int, qid_t, struct fs_disk_quota *);
diff --git a/include/linux/quotaops.h b/include/linux/quotaops.h
index 17b977304a09..ec6b65feaaba 100644
--- a/include/linux/quotaops.h
+++ b/include/linux/quotaops.h
@@ -83,7 +83,8 @@ int dquot_quota_on(struct super_block *sb, int type, int format_id,
int dquot_quota_on_mount(struct super_block *sb, char *qf_name,
int format_id, int type);
int dquot_quota_off(struct super_block *sb, int type);
-int dquot_quota_sync(struct super_block *sb, int type, int wait);
+int dquot_writeback_dquots(struct super_block *sb, int type);
+int dquot_quota_sync(struct super_block *sb, int type);
int dquot_get_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii);
int dquot_set_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii);
int dquot_get_dqblk(struct super_block *sb, int type, qid_t id,
@@ -255,6 +256,11 @@ static inline int dquot_resume(struct super_block *sb, int type)
#define dquot_file_open generic_file_open
+static inline int dquot_writeback_dquots(struct super_block *sb, int type)
+{
+ return 0;
+}
+
#endif /* CONFIG_QUOTA */
static inline int dquot_alloc_space_nodirty(struct inode *inode, qsize_t nr)
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 64d9df5c3a49..1a2ebd39b800 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1405,7 +1405,7 @@ struct task_struct {
int (*notifier)(void *priv);
void *notifier_data;
sigset_t *notifier_mask;
- struct hlist_head task_works;
+ struct callback_head *task_works;
struct audit_context *audit_context;
#ifdef CONFIG_AUDITSYSCALL
@@ -1546,7 +1546,6 @@ struct task_struct {
unsigned long timer_slack_ns;
unsigned long default_timer_slack_ns;
- struct list_head *scm_work_list;
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
/* Index of current stored address in ret_stack */
int curr_ret_stack;
diff --git a/include/linux/task_work.h b/include/linux/task_work.h
index 294d5d5e90b1..fb46b03b1852 100644
--- a/include/linux/task_work.h
+++ b/include/linux/task_work.h
@@ -4,29 +4,21 @@
#include <linux/list.h>
#include <linux/sched.h>
-struct task_work;
-typedef void (*task_work_func_t)(struct task_work *);
-
-struct task_work {
- struct hlist_node hlist;
- task_work_func_t func;
- void *data;
-};
+typedef void (*task_work_func_t)(struct callback_head *);
static inline void
-init_task_work(struct task_work *twork, task_work_func_t func, void *data)
+init_task_work(struct callback_head *twork, task_work_func_t func)
{
twork->func = func;
- twork->data = data;
}
-int task_work_add(struct task_struct *task, struct task_work *twork, bool);
-struct task_work *task_work_cancel(struct task_struct *, task_work_func_t);
+int task_work_add(struct task_struct *task, struct callback_head *twork, bool);
+struct callback_head *task_work_cancel(struct task_struct *, task_work_func_t);
void task_work_run(void);
static inline void exit_task_work(struct task_struct *task)
{
- if (unlikely(!hlist_empty(&task->task_works)))
+ if (unlikely(task->task_works))
task_work_run();
}
diff --git a/include/linux/tracehook.h b/include/linux/tracehook.h
index 6a4d82bedb03..1e98b5530425 100644
--- a/include/linux/tracehook.h
+++ b/include/linux/tracehook.h
@@ -192,7 +192,7 @@ static inline void tracehook_notify_resume(struct pt_regs *regs)
* hlist_add_head(task->task_works);
*/
smp_mb__after_clear_bit();
- if (unlikely(!hlist_empty(&current->task_works)))
+ if (unlikely(current->task_works))
task_work_run();
}
diff --git a/include/linux/types.h b/include/linux/types.h
index 9c1bd539ea70..bf0dd7524b2a 100644
--- a/include/linux/types.h
+++ b/include/linux/types.h
@@ -246,14 +246,15 @@ struct ustat {
};
/**
- * struct rcu_head - callback structure for use with RCU
+ * struct callback_head - callback structure for use with RCU and task_work
* @next: next update requests in a list
* @func: actual update function to call after the grace period.
*/
-struct rcu_head {
- struct rcu_head *next;
- void (*func)(struct rcu_head *head);
+struct callback_head {
+ struct callback_head *next;
+ void (*func)(struct callback_head *head);
};
+#define rcu_head callback_head
#endif /* __KERNEL__ */
#endif /* __ASSEMBLY__ */
diff --git a/include/net/scm.h b/include/net/scm.h
index d456f4c71a32..079d7887dac1 100644
--- a/include/net/scm.h
+++ b/include/net/scm.h
@@ -13,7 +13,6 @@
#define SCM_MAX_FD 253
struct scm_fp_list {
- struct list_head list;
short count;
short max;
struct file *fp[SCM_MAX_FD];