494 lines
13 KiB
C
494 lines
13 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* (C) 2001 Clemson University and The University of Chicago
|
|
*
|
|
* See COPYING in top-level directory.
|
|
*/
|
|
|
|
/*
|
|
* The ORANGEFS Linux kernel support allows ORANGEFS volumes to be mounted and
|
|
* accessed through the Linux VFS (i.e. using standard I/O system calls).
|
|
* This support is only needed on clients that wish to mount the file system.
|
|
*
|
|
*/
|
|
|
|
/*
|
|
* Declarations and macros for the ORANGEFS Linux kernel support.
|
|
*/
|
|
|
|
#ifndef __ORANGEFSKERNEL_H
|
|
#define __ORANGEFSKERNEL_H
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/moduleparam.h>
|
|
#include <linux/statfs.h>
|
|
#include <linux/backing-dev.h>
|
|
#include <linux/device.h>
|
|
#include <linux/mpage.h>
|
|
#include <linux/namei.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/init.h>
|
|
#include <linux/module.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/types.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/vmalloc.h>
|
|
|
|
#include <linux/aio.h>
|
|
#include <linux/posix_acl.h>
|
|
#include <linux/posix_acl_xattr.h>
|
|
#include <linux/compat.h>
|
|
#include <linux/mount.h>
|
|
#include <linux/uaccess.h>
|
|
#include <linux/atomic.h>
|
|
#include <linux/uio.h>
|
|
#include <linux/sched/signal.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/wait.h>
|
|
#include <linux/dcache.h>
|
|
#include <linux/pagemap.h>
|
|
#include <linux/poll.h>
|
|
#include <linux/rwsem.h>
|
|
#include <linux/xattr.h>
|
|
#include <linux/exportfs.h>
|
|
#include <linux/hashtable.h>
|
|
|
|
#include <asm/unaligned.h>
|
|
|
|
#include "orangefs-dev-proto.h"
|
|
|
|
#define ORANGEFS_DEFAULT_OP_TIMEOUT_SECS 20
|
|
|
|
#define ORANGEFS_BUFMAP_WAIT_TIMEOUT_SECS 30
|
|
|
|
#define ORANGEFS_DEFAULT_SLOT_TIMEOUT_SECS 900 /* 15 minutes */
|
|
|
|
#define ORANGEFS_REQDEVICE_NAME "pvfs2-req"
|
|
|
|
#define ORANGEFS_DEVREQ_MAGIC 0x20030529
|
|
#define ORANGEFS_PURGE_RETRY_COUNT 0x00000005
|
|
|
|
#define MAX_DEV_REQ_UPSIZE (2 * sizeof(__s32) + \
|
|
sizeof(__u64) + sizeof(struct orangefs_upcall_s))
|
|
#define MAX_DEV_REQ_DOWNSIZE (2 * sizeof(__s32) + \
|
|
sizeof(__u64) + sizeof(struct orangefs_downcall_s))
|
|
|
|
/*
|
|
* valid orangefs kernel operation states
|
|
*
|
|
* unknown - op was just initialized
|
|
* waiting - op is on request_list (upward bound)
|
|
* inprogr - op is in progress (waiting for downcall)
|
|
* serviced - op has matching downcall; ok
|
|
* purged - op has to start a timer since client-core
|
|
* exited uncleanly before servicing op
|
|
* given up - submitter has given up waiting for it
|
|
*/
|
|
enum orangefs_vfs_op_states {
|
|
OP_VFS_STATE_UNKNOWN = 0,
|
|
OP_VFS_STATE_WAITING = 1,
|
|
OP_VFS_STATE_INPROGR = 2,
|
|
OP_VFS_STATE_SERVICED = 4,
|
|
OP_VFS_STATE_PURGED = 8,
|
|
OP_VFS_STATE_GIVEN_UP = 16,
|
|
};
|
|
|
|
/*
|
|
* orangefs kernel memory related flags
|
|
*/
|
|
|
|
#if (defined CONFIG_DEBUG_SLAB)
|
|
#define ORANGEFS_CACHE_CREATE_FLAGS SLAB_RED_ZONE
|
|
#else
|
|
#define ORANGEFS_CACHE_CREATE_FLAGS 0
|
|
#endif
|
|
|
|
extern const struct xattr_handler * const orangefs_xattr_handlers[];
|
|
|
|
extern struct posix_acl *orangefs_get_acl(struct inode *inode, int type, bool rcu);
|
|
extern int orangefs_set_acl(struct mnt_idmap *idmap,
|
|
struct dentry *dentry, struct posix_acl *acl,
|
|
int type);
|
|
int __orangefs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
|
|
|
|
/*
|
|
* orangefs data structures
|
|
*/
|
|
struct orangefs_kernel_op_s {
|
|
enum orangefs_vfs_op_states op_state;
|
|
__u64 tag;
|
|
|
|
/*
|
|
* Set uses_shared_memory to non zero if this operation uses
|
|
* shared memory. If true, then a retry on the op must also
|
|
* get a new shared memory buffer and re-populate it.
|
|
* Cancels don't care - it only matters for service_operation()
|
|
* retry logics and cancels don't go through it anymore. It
|
|
* safely stays non-zero when we use it as slot_to_free.
|
|
*/
|
|
union {
|
|
int uses_shared_memory;
|
|
int slot_to_free;
|
|
};
|
|
|
|
struct orangefs_upcall_s upcall;
|
|
struct orangefs_downcall_s downcall;
|
|
|
|
struct completion waitq;
|
|
spinlock_t lock;
|
|
|
|
int attempts;
|
|
|
|
struct list_head list;
|
|
};
|
|
|
|
#define set_op_state_waiting(op) ((op)->op_state = OP_VFS_STATE_WAITING)
|
|
#define set_op_state_inprogress(op) ((op)->op_state = OP_VFS_STATE_INPROGR)
|
|
#define set_op_state_given_up(op) ((op)->op_state = OP_VFS_STATE_GIVEN_UP)
|
|
static inline void set_op_state_serviced(struct orangefs_kernel_op_s *op)
|
|
{
|
|
op->op_state = OP_VFS_STATE_SERVICED;
|
|
complete(&op->waitq);
|
|
}
|
|
|
|
#define op_state_waiting(op) ((op)->op_state & OP_VFS_STATE_WAITING)
|
|
#define op_state_in_progress(op) ((op)->op_state & OP_VFS_STATE_INPROGR)
|
|
#define op_state_serviced(op) ((op)->op_state & OP_VFS_STATE_SERVICED)
|
|
#define op_state_purged(op) ((op)->op_state & OP_VFS_STATE_PURGED)
|
|
#define op_state_given_up(op) ((op)->op_state & OP_VFS_STATE_GIVEN_UP)
|
|
#define op_is_cancel(op) ((op)->upcall.type == ORANGEFS_VFS_OP_CANCEL)
|
|
|
|
void op_release(struct orangefs_kernel_op_s *op);
|
|
|
|
extern void orangefs_bufmap_put(int);
|
|
static inline void put_cancel(struct orangefs_kernel_op_s *op)
|
|
{
|
|
orangefs_bufmap_put(op->slot_to_free);
|
|
op_release(op);
|
|
}
|
|
|
|
static inline void set_op_state_purged(struct orangefs_kernel_op_s *op)
|
|
{
|
|
spin_lock(&op->lock);
|
|
if (unlikely(op_is_cancel(op))) {
|
|
list_del_init(&op->list);
|
|
spin_unlock(&op->lock);
|
|
put_cancel(op);
|
|
} else {
|
|
op->op_state |= OP_VFS_STATE_PURGED;
|
|
complete(&op->waitq);
|
|
spin_unlock(&op->lock);
|
|
}
|
|
}
|
|
|
|
/* per inode private orangefs info */
|
|
struct orangefs_inode_s {
|
|
struct orangefs_object_kref refn;
|
|
char link_target[ORANGEFS_NAME_MAX];
|
|
/*
|
|
* Reading/Writing Extended attributes need to acquire the appropriate
|
|
* reader/writer semaphore on the orangefs_inode_s structure.
|
|
*/
|
|
struct rw_semaphore xattr_sem;
|
|
|
|
struct inode vfs_inode;
|
|
sector_t last_failed_block_index_read;
|
|
|
|
unsigned long getattr_time;
|
|
unsigned long mapping_time;
|
|
int attr_valid;
|
|
kuid_t attr_uid;
|
|
kgid_t attr_gid;
|
|
unsigned long bitlock;
|
|
|
|
DECLARE_HASHTABLE(xattr_cache, 4);
|
|
};
|
|
|
|
/* per superblock private orangefs info */
|
|
struct orangefs_sb_info_s {
|
|
struct orangefs_khandle root_khandle;
|
|
__s32 fs_id;
|
|
int id;
|
|
int flags;
|
|
#define ORANGEFS_OPT_INTR 0x01
|
|
#define ORANGEFS_OPT_LOCAL_LOCK 0x02
|
|
char devname[ORANGEFS_MAX_SERVER_ADDR_LEN];
|
|
struct super_block *sb;
|
|
int mount_pending;
|
|
int no_list;
|
|
struct list_head list;
|
|
};
|
|
|
|
struct orangefs_stats {
|
|
unsigned long cache_hits;
|
|
unsigned long cache_misses;
|
|
unsigned long reads;
|
|
unsigned long writes;
|
|
};
|
|
|
|
struct orangefs_cached_xattr {
|
|
struct hlist_node node;
|
|
char key[ORANGEFS_MAX_XATTR_NAMELEN];
|
|
char val[ORANGEFS_MAX_XATTR_VALUELEN];
|
|
ssize_t length;
|
|
unsigned long timeout;
|
|
};
|
|
|
|
struct orangefs_write_range {
|
|
loff_t pos;
|
|
size_t len;
|
|
kuid_t uid;
|
|
kgid_t gid;
|
|
};
|
|
|
|
extern struct orangefs_stats orangefs_stats;
|
|
|
|
/*
|
|
* NOTE: See Documentation/filesystems/porting.rst for information
|
|
* on implementing FOO_I and properly accessing fs private data
|
|
*/
|
|
static inline struct orangefs_inode_s *ORANGEFS_I(struct inode *inode)
|
|
{
|
|
return container_of(inode, struct orangefs_inode_s, vfs_inode);
|
|
}
|
|
|
|
static inline struct orangefs_sb_info_s *ORANGEFS_SB(struct super_block *sb)
|
|
{
|
|
return (struct orangefs_sb_info_s *) sb->s_fs_info;
|
|
}
|
|
|
|
/* ino_t descends from "unsigned long", 8 bytes, 64 bits. */
|
|
static inline ino_t orangefs_khandle_to_ino(struct orangefs_khandle *khandle)
|
|
{
|
|
union {
|
|
unsigned char u[8];
|
|
__u64 ino;
|
|
} ihandle;
|
|
|
|
ihandle.u[0] = khandle->u[0] ^ khandle->u[4];
|
|
ihandle.u[1] = khandle->u[1] ^ khandle->u[5];
|
|
ihandle.u[2] = khandle->u[2] ^ khandle->u[6];
|
|
ihandle.u[3] = khandle->u[3] ^ khandle->u[7];
|
|
ihandle.u[4] = khandle->u[12] ^ khandle->u[8];
|
|
ihandle.u[5] = khandle->u[13] ^ khandle->u[9];
|
|
ihandle.u[6] = khandle->u[14] ^ khandle->u[10];
|
|
ihandle.u[7] = khandle->u[15] ^ khandle->u[11];
|
|
|
|
return ihandle.ino;
|
|
}
|
|
|
|
static inline struct orangefs_khandle *get_khandle_from_ino(struct inode *inode)
|
|
{
|
|
return &(ORANGEFS_I(inode)->refn.khandle);
|
|
}
|
|
|
|
static inline int is_root_handle(struct inode *inode)
|
|
{
|
|
gossip_debug(GOSSIP_DCACHE_DEBUG,
|
|
"%s: root handle: %pU, this handle: %pU:\n",
|
|
__func__,
|
|
&ORANGEFS_SB(inode->i_sb)->root_khandle,
|
|
get_khandle_from_ino(inode));
|
|
|
|
if (ORANGEFS_khandle_cmp(&(ORANGEFS_SB(inode->i_sb)->root_khandle),
|
|
get_khandle_from_ino(inode)))
|
|
return 0;
|
|
else
|
|
return 1;
|
|
}
|
|
|
|
static inline int match_handle(struct orangefs_khandle resp_handle,
|
|
struct inode *inode)
|
|
{
|
|
gossip_debug(GOSSIP_DCACHE_DEBUG,
|
|
"%s: one handle: %pU, another handle:%pU:\n",
|
|
__func__,
|
|
&resp_handle,
|
|
get_khandle_from_ino(inode));
|
|
|
|
if (ORANGEFS_khandle_cmp(&resp_handle, get_khandle_from_ino(inode)))
|
|
return 0;
|
|
else
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* defined in orangefs-cache.c
|
|
*/
|
|
int op_cache_initialize(void);
|
|
int op_cache_finalize(void);
|
|
struct orangefs_kernel_op_s *op_alloc(__s32 type);
|
|
void orangefs_new_tag(struct orangefs_kernel_op_s *op);
|
|
char *get_opname_string(struct orangefs_kernel_op_s *new_op);
|
|
|
|
int orangefs_inode_cache_initialize(void);
|
|
int orangefs_inode_cache_finalize(void);
|
|
|
|
/*
|
|
* defined in orangefs-mod.c
|
|
*/
|
|
void purge_inprogress_ops(void);
|
|
|
|
/*
|
|
* defined in waitqueue.c
|
|
*/
|
|
void purge_waiting_ops(void);
|
|
|
|
/*
|
|
* defined in super.c
|
|
*/
|
|
extern uint64_t orangefs_features;
|
|
|
|
struct dentry *orangefs_mount(struct file_system_type *fst,
|
|
int flags,
|
|
const char *devname,
|
|
void *data);
|
|
|
|
void orangefs_kill_sb(struct super_block *sb);
|
|
int orangefs_remount(struct orangefs_sb_info_s *);
|
|
|
|
int fsid_key_table_initialize(void);
|
|
void fsid_key_table_finalize(void);
|
|
|
|
/*
|
|
* defined in inode.c
|
|
*/
|
|
vm_fault_t orangefs_page_mkwrite(struct vm_fault *);
|
|
struct inode *orangefs_new_inode(struct super_block *sb,
|
|
struct inode *dir,
|
|
umode_t mode,
|
|
dev_t dev,
|
|
struct orangefs_object_kref *ref);
|
|
|
|
int __orangefs_setattr(struct inode *, struct iattr *);
|
|
int __orangefs_setattr_mode(struct dentry *dentry, struct iattr *iattr);
|
|
int orangefs_setattr(struct mnt_idmap *, struct dentry *, struct iattr *);
|
|
|
|
int orangefs_getattr(struct mnt_idmap *idmap, const struct path *path,
|
|
struct kstat *stat, u32 request_mask, unsigned int flags);
|
|
|
|
int orangefs_permission(struct mnt_idmap *idmap,
|
|
struct inode *inode, int mask);
|
|
|
|
int orangefs_update_time(struct inode *, int);
|
|
|
|
/*
|
|
* defined in xattr.c
|
|
*/
|
|
ssize_t orangefs_listxattr(struct dentry *dentry, char *buffer, size_t size);
|
|
|
|
/*
|
|
* defined in namei.c
|
|
*/
|
|
struct inode *orangefs_iget(struct super_block *sb,
|
|
struct orangefs_object_kref *ref);
|
|
|
|
/*
|
|
* defined in devorangefs-req.c
|
|
*/
|
|
extern uint32_t orangefs_userspace_version;
|
|
|
|
int orangefs_dev_init(void);
|
|
void orangefs_dev_cleanup(void);
|
|
int is_daemon_in_service(void);
|
|
bool __is_daemon_in_service(void);
|
|
|
|
/*
|
|
* defined in file.c
|
|
*/
|
|
int orangefs_revalidate_mapping(struct inode *);
|
|
ssize_t wait_for_direct_io(enum ORANGEFS_io_type, struct inode *, loff_t *,
|
|
struct iov_iter *, size_t, loff_t, struct orangefs_write_range *, int *,
|
|
struct file *);
|
|
ssize_t do_readv_writev(enum ORANGEFS_io_type, struct file *, loff_t *,
|
|
struct iov_iter *);
|
|
|
|
/*
|
|
* defined in orangefs-utils.c
|
|
*/
|
|
__s32 fsid_of_op(struct orangefs_kernel_op_s *op);
|
|
|
|
ssize_t orangefs_inode_getxattr(struct inode *inode,
|
|
const char *name,
|
|
void *buffer,
|
|
size_t size);
|
|
|
|
int orangefs_inode_setxattr(struct inode *inode,
|
|
const char *name,
|
|
const void *value,
|
|
size_t size,
|
|
int flags);
|
|
|
|
#define ORANGEFS_GETATTR_NEW 1
|
|
#define ORANGEFS_GETATTR_SIZE 2
|
|
|
|
int orangefs_inode_getattr(struct inode *, int);
|
|
|
|
int orangefs_inode_check_changed(struct inode *inode);
|
|
|
|
int orangefs_inode_setattr(struct inode *inode);
|
|
|
|
bool orangefs_cancel_op_in_progress(struct orangefs_kernel_op_s *op);
|
|
|
|
int orangefs_normalize_to_errno(__s32 error_code);
|
|
|
|
extern struct mutex orangefs_request_mutex;
|
|
extern int op_timeout_secs;
|
|
extern int slot_timeout_secs;
|
|
extern int orangefs_cache_timeout_msecs;
|
|
extern int orangefs_dcache_timeout_msecs;
|
|
extern int orangefs_getattr_timeout_msecs;
|
|
extern struct list_head orangefs_superblocks;
|
|
extern spinlock_t orangefs_superblocks_lock;
|
|
extern struct list_head orangefs_request_list;
|
|
extern spinlock_t orangefs_request_list_lock;
|
|
extern wait_queue_head_t orangefs_request_list_waitq;
|
|
extern struct list_head *orangefs_htable_ops_in_progress;
|
|
extern spinlock_t orangefs_htable_ops_in_progress_lock;
|
|
extern int hash_table_size;
|
|
|
|
extern const struct file_operations orangefs_file_operations;
|
|
extern const struct inode_operations orangefs_symlink_inode_operations;
|
|
extern const struct inode_operations orangefs_dir_inode_operations;
|
|
extern const struct file_operations orangefs_dir_operations;
|
|
extern const struct dentry_operations orangefs_dentry_operations;
|
|
|
|
/*
|
|
* misc convenience macros
|
|
*/
|
|
|
|
#define ORANGEFS_OP_INTERRUPTIBLE 1 /* service_operation() is interruptible */
|
|
#define ORANGEFS_OP_PRIORITY 2 /* service_operation() is high priority */
|
|
#define ORANGEFS_OP_CANCELLATION 4 /* this is a cancellation */
|
|
#define ORANGEFS_OP_NO_MUTEX 8 /* don't acquire request_mutex */
|
|
#define ORANGEFS_OP_ASYNC 16 /* Queue it, but don't wait */
|
|
#define ORANGEFS_OP_WRITEBACK 32
|
|
|
|
int service_operation(struct orangefs_kernel_op_s *op,
|
|
const char *op_name,
|
|
int flags);
|
|
|
|
#define get_interruptible_flag(inode) \
|
|
((ORANGEFS_SB(inode->i_sb)->flags & ORANGEFS_OPT_INTR) ? \
|
|
ORANGEFS_OP_INTERRUPTIBLE : 0)
|
|
|
|
#define fill_default_sys_attrs(sys_attr, type, mode) \
|
|
do { \
|
|
sys_attr.owner = from_kuid(&init_user_ns, current_fsuid()); \
|
|
sys_attr.group = from_kgid(&init_user_ns, current_fsgid()); \
|
|
sys_attr.perms = ORANGEFS_util_translate_mode(mode); \
|
|
sys_attr.mtime = 0; \
|
|
sys_attr.atime = 0; \
|
|
sys_attr.ctime = 0; \
|
|
sys_attr.mask = ORANGEFS_ATTR_SYS_ALL_SETABLE; \
|
|
} while (0)
|
|
|
|
static inline void orangefs_set_timeout(struct dentry *dentry)
|
|
{
|
|
unsigned long time = jiffies + orangefs_dcache_timeout_msecs*HZ/1000;
|
|
|
|
dentry->d_fsdata = (void *) time;
|
|
}
|
|
|
|
#endif /* __ORANGEFSKERNEL_H */
|