/* * (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.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 <asm/unaligned.h> #include "orangefs-dev-proto.h" #ifdef ORANGEFS_KERNEL_DEBUG #define ORANGEFS_DEFAULT_OP_TIMEOUT_SECS 10 #else #define ORANGEFS_DEFAULT_OP_TIMEOUT_SECS 20 #endif #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_LINK_MAX 0x000000FF #define ORANGEFS_PURGE_RETRY_COUNT 0x00000005 #define ORANGEFS_MAX_NUM_OPTIONS 0x00000004 #define ORANGEFS_MAX_MOUNT_OPT_LEN 0x00000080 #define ORANGEFS_MAX_FSKEY_LEN 64 #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 ORANGEFS_KERNEL_DEBUG) && (defined CONFIG_DEBUG_SLAB)) #define ORANGEFS_CACHE_CREATE_FLAGS SLAB_RED_ZONE #else #define ORANGEFS_CACHE_CREATE_FLAGS 0 #endif /* ((defined ORANGEFS_KERNEL_DEBUG) && (defined CONFIG_DEBUG_SLAB)) */ extern int orangefs_init_acl(struct inode *inode, struct inode *dir); extern const struct xattr_handler *orangefs_xattr_handlers[]; extern struct posix_acl *orangefs_get_acl(struct inode *inode, int type); extern int orangefs_set_acl(struct inode *inode, struct posix_acl *acl, int type); /* * Redefine xtvec structure so that we could move helper functions out of * the define */ struct xtvec { __kernel_off_t xtv_off; /* must be off_t */ __kernel_size_t xtv_len; /* must be size_t */ }; /* * 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]; __s64 blksize; /* * 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; /* * State of in-memory attributes not yet flushed to disk associated * with this object */ unsigned long pinode_flags; unsigned long getattr_time; }; #define P_ATIME_FLAG 0 #define P_MTIME_FLAG 1 #define P_CTIME_FLAG 2 #define P_MODE_FLAG 3 #define ClearAtimeFlag(pinode) clear_bit(P_ATIME_FLAG, &(pinode)->pinode_flags) #define SetAtimeFlag(pinode) set_bit(P_ATIME_FLAG, &(pinode)->pinode_flags) #define AtimeFlag(pinode) test_bit(P_ATIME_FLAG, &(pinode)->pinode_flags) #define ClearMtimeFlag(pinode) clear_bit(P_MTIME_FLAG, &(pinode)->pinode_flags) #define SetMtimeFlag(pinode) set_bit(P_MTIME_FLAG, &(pinode)->pinode_flags) #define MtimeFlag(pinode) test_bit(P_MTIME_FLAG, &(pinode)->pinode_flags) #define ClearCtimeFlag(pinode) clear_bit(P_CTIME_FLAG, &(pinode)->pinode_flags) #define SetCtimeFlag(pinode) set_bit(P_CTIME_FLAG, &(pinode)->pinode_flags) #define CtimeFlag(pinode) test_bit(P_CTIME_FLAG, &(pinode)->pinode_flags) #define ClearModeFlag(pinode) clear_bit(P_MODE_FLAG, &(pinode)->pinode_flags) #define SetModeFlag(pinode) set_bit(P_MODE_FLAG, &(pinode)->pinode_flags) #define ModeFlag(pinode) test_bit(P_MODE_FLAG, &(pinode)->pinode_flags) /* 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; struct list_head list; }; /* * structure that holds the state of any async I/O operation issued * through the VFS. Needed especially to handle cancellation requests * or even completion notification so that the VFS client-side daemon * can free up its vfs_request slots. */ struct orangefs_kiocb_s { /* the pointer to the task that initiated the AIO */ struct task_struct *tsk; /* pointer to the kiocb that kicked this operation */ struct kiocb *kiocb; /* buffer index that was used for the I/O */ struct orangefs_bufmap *bufmap; int buffer_index; /* orangefs kernel operation type */ struct orangefs_kernel_op_s *op; /* The user space buffers from/to which I/O is being staged */ struct iovec *iov; /* number of elements in the iovector */ unsigned long nr_segs; /* set to indicate the type of the operation */ int rw; /* file offset */ loff_t offset; /* and the count in bytes */ size_t bytes_to_be_copied; ssize_t bytes_copied; int needs_cleanup; }; struct orangefs_stats { unsigned long cache_hits; unsigned long cache_misses; unsigned long reads; unsigned long writes; }; extern struct orangefs_stats orangefs_stats; /* * NOTE: See Documentation/filesystems/porting 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 __s32 get_fsid_from_ino(struct inode *inode) { return ORANGEFS_I(inode)->refn.fs_id; } static inline ino_t get_ino_from_khandle(struct inode *inode) { struct orangefs_khandle *khandle; ino_t ino; khandle = get_khandle_from_ino(inode); ino = orangefs_khandle_to_ino(khandle); return ino; } static inline ino_t get_parent_ino_from_dentry(struct dentry *dentry) { return get_ino_from_khandle(dentry->d_parent->d_inode); } 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 */ __u32 convert_to_orangefs_mask(unsigned long lite_mask); struct inode *orangefs_new_inode(struct super_block *sb, struct inode *dir, int mode, dev_t dev, struct orangefs_object_kref *ref); int orangefs_setattr(struct dentry *dentry, struct iattr *iattr); int orangefs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *kstat); int orangefs_permission(struct inode *inode, int mask); /* * defined in xattr.c */ int orangefs_setxattr(struct dentry *dentry, const char *name, const void *value, size_t size, int flags); ssize_t orangefs_getxattr(struct dentry *dentry, const char *name, void *buffer, size_t size); 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); ssize_t orangefs_inode_read(struct inode *inode, struct iov_iter *iter, loff_t *offset, loff_t readahead_size); /* * 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 orangefs-utils.c */ __s32 fsid_of_op(struct orangefs_kernel_op_s *op); int orangefs_flush_inode(struct inode *inode); 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); int orangefs_inode_getattr(struct inode *inode, int new, int bypass); int orangefs_inode_check_changed(struct inode *inode); int orangefs_inode_setattr(struct inode *inode, struct iattr *iattr); void orangefs_make_bad_inode(struct inode *inode); int orangefs_unmount_sb(struct super_block *sb); 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_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 address_space_operations orangefs_address_operations; extern struct backing_dev_info orangefs_backing_dev_info; extern const struct inode_operations orangefs_file_inode_operations; 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; extern const struct file_operations orangefs_devreq_file_operations; extern wait_queue_head_t orangefs_bufmap_init_waitq; /* * 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 */ 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_i_size_write(struct inode *inode, loff_t i_size) { #if BITS_PER_LONG == 32 && defined(CONFIG_SMP) inode_lock(inode); #endif i_size_write(inode, i_size); #if BITS_PER_LONG == 32 && defined(CONFIG_SMP) inode_unlock(inode); #endif } 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 */