diff options
Diffstat (limited to 'ANDROID_3.4.5/fs/ocfs2/ocfs2.h')
| -rw-r--r-- | ANDROID_3.4.5/fs/ocfs2/ocfs2.h | 900 |
1 files changed, 0 insertions, 900 deletions
diff --git a/ANDROID_3.4.5/fs/ocfs2/ocfs2.h b/ANDROID_3.4.5/fs/ocfs2/ocfs2.h deleted file mode 100644 index d355e6e3..00000000 --- a/ANDROID_3.4.5/fs/ocfs2/ocfs2.h +++ /dev/null @@ -1,900 +0,0 @@ -/* -*- mode: c; c-basic-offset: 8; -*- - * vim: noexpandtab sw=8 ts=8 sts=0: - * - * ocfs2.h - * - * Defines macros and structures used in OCFS2 - * - * Copyright (C) 2002, 2004 Oracle. All rights reserved. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public - * License as published by the Free Software Foundation; either - * version 2 of the License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public - * License along with this program; if not, write to the - * Free Software Foundation, Inc., 59 Temple Place - Suite 330, - * Boston, MA 021110-1307, USA. - */ - -#ifndef OCFS2_H -#define OCFS2_H - -#include <linux/spinlock.h> -#include <linux/sched.h> -#include <linux/wait.h> -#include <linux/list.h> -#include <linux/rbtree.h> -#include <linux/workqueue.h> -#include <linux/kref.h> -#include <linux/mutex.h> -#include <linux/lockdep.h> -#include <linux/jbd2.h> - -/* For union ocfs2_dlm_lksb */ -#include "stackglue.h" - -#include "ocfs2_fs.h" -#include "ocfs2_lockid.h" -#include "ocfs2_ioctl.h" - -/* For struct ocfs2_blockcheck_stats */ -#include "blockcheck.h" - -#include "reservations.h" - -/* Caching of metadata buffers */ - -/* Most user visible OCFS2 inodes will have very few pieces of - * metadata, but larger files (including bitmaps, etc) must be taken - * into account when designing an access scheme. We allow a small - * amount of inlined blocks to be stored on an array and grow the - * structure into a rb tree when necessary. */ -#define OCFS2_CACHE_INFO_MAX_ARRAY 2 - -/* Flags for ocfs2_caching_info */ - -enum ocfs2_caching_info_flags { - /* Indicates that the metadata cache is using the inline array */ - OCFS2_CACHE_FL_INLINE = 1<<1, -}; - -struct ocfs2_caching_operations; -struct ocfs2_caching_info { - /* - * The parent structure provides the locks, but because the - * parent structure can differ, it provides locking operations - * to struct ocfs2_caching_info. - */ - const struct ocfs2_caching_operations *ci_ops; - - /* next two are protected by trans_inc_lock */ - /* which transaction were we created on? Zero if none. */ - unsigned long ci_created_trans; - /* last transaction we were a part of. */ - unsigned long ci_last_trans; - - /* Cache structures */ - unsigned int ci_flags; - unsigned int ci_num_cached; - union { - sector_t ci_array[OCFS2_CACHE_INFO_MAX_ARRAY]; - struct rb_root ci_tree; - } ci_cache; -}; -/* - * Need this prototype here instead of in uptodate.h because journal.h - * uses it. - */ -struct super_block *ocfs2_metadata_cache_get_super(struct ocfs2_caching_info *ci); - -/* this limits us to 256 nodes - * if we need more, we can do a kmalloc for the map */ -#define OCFS2_NODE_MAP_MAX_NODES 256 -struct ocfs2_node_map { - u16 num_nodes; - unsigned long map[BITS_TO_LONGS(OCFS2_NODE_MAP_MAX_NODES)]; -}; - -enum ocfs2_ast_action { - OCFS2_AST_INVALID = 0, - OCFS2_AST_ATTACH, - OCFS2_AST_CONVERT, - OCFS2_AST_DOWNCONVERT, -}; - -/* actions for an unlockast function to take. */ -enum ocfs2_unlock_action { - OCFS2_UNLOCK_INVALID = 0, - OCFS2_UNLOCK_CANCEL_CONVERT, - OCFS2_UNLOCK_DROP_LOCK, -}; - -/* ocfs2_lock_res->l_flags flags. */ -#define OCFS2_LOCK_ATTACHED (0x00000001) /* we have initialized - * the lvb */ -#define OCFS2_LOCK_BUSY (0x00000002) /* we are currently in - * dlm_lock */ -#define OCFS2_LOCK_BLOCKED (0x00000004) /* blocked waiting to - * downconvert*/ -#define OCFS2_LOCK_LOCAL (0x00000008) /* newly created inode */ -#define OCFS2_LOCK_NEEDS_REFRESH (0x00000010) -#define OCFS2_LOCK_REFRESHING (0x00000020) -#define OCFS2_LOCK_INITIALIZED (0x00000040) /* track initialization - * for shutdown paths */ -#define OCFS2_LOCK_FREEING (0x00000080) /* help dlmglue track - * when to skip queueing - * a lock because it's - * about to be - * dropped. */ -#define OCFS2_LOCK_QUEUED (0x00000100) /* queued for downconvert */ -#define OCFS2_LOCK_NOCACHE (0x00000200) /* don't use a holder count */ -#define OCFS2_LOCK_PENDING (0x00000400) /* This lockres is pending a - call to dlm_lock. Only - exists with BUSY set. */ -#define OCFS2_LOCK_UPCONVERT_FINISHING (0x00000800) /* blocks the dc thread - * from downconverting - * before the upconvert - * has completed */ - -struct ocfs2_lock_res_ops; - -typedef void (*ocfs2_lock_callback)(int status, unsigned long data); - -#ifdef CONFIG_OCFS2_FS_STATS -struct ocfs2_lock_stats { - u64 ls_total; /* Total wait in NSEC */ - u32 ls_gets; /* Num acquires */ - u32 ls_fail; /* Num failed acquires */ - - /* Storing max wait in usecs saves 24 bytes per inode */ - u32 ls_max; /* Max wait in USEC */ -}; -#endif - -struct ocfs2_lock_res { - void *l_priv; - struct ocfs2_lock_res_ops *l_ops; - - - struct list_head l_blocked_list; - struct list_head l_mask_waiters; - - unsigned long l_flags; - char l_name[OCFS2_LOCK_ID_MAX_LEN]; - unsigned int l_ro_holders; - unsigned int l_ex_holders; - signed char l_level; - signed char l_requested; - signed char l_blocking; - - /* Data packed - type enum ocfs2_lock_type */ - unsigned char l_type; - - /* used from AST/BAST funcs. */ - /* Data packed - enum type ocfs2_ast_action */ - unsigned char l_action; - /* Data packed - enum type ocfs2_unlock_action */ - unsigned char l_unlock_action; - unsigned int l_pending_gen; - - spinlock_t l_lock; - - struct ocfs2_dlm_lksb l_lksb; - - wait_queue_head_t l_event; - - struct list_head l_debug_list; - -#ifdef CONFIG_OCFS2_FS_STATS - struct ocfs2_lock_stats l_lock_prmode; /* PR mode stats */ - u32 l_lock_refresh; /* Disk refreshes */ - struct ocfs2_lock_stats l_lock_exmode; /* EX mode stats */ -#endif -#ifdef CONFIG_DEBUG_LOCK_ALLOC - struct lockdep_map l_lockdep_map; -#endif -}; - -enum ocfs2_orphan_scan_state { - ORPHAN_SCAN_ACTIVE, - ORPHAN_SCAN_INACTIVE -}; - -struct ocfs2_orphan_scan { - struct mutex os_lock; - struct ocfs2_super *os_osb; - struct ocfs2_lock_res os_lockres; /* lock to synchronize scans */ - struct delayed_work os_orphan_scan_work; - struct timespec os_scantime; /* time this node ran the scan */ - u32 os_count; /* tracks node specific scans */ - u32 os_seqno; /* tracks cluster wide scans */ - atomic_t os_state; /* ACTIVE or INACTIVE */ -}; - -struct ocfs2_dlm_debug { - struct kref d_refcnt; - struct dentry *d_locking_state; - struct list_head d_lockres_tracking; -}; - -enum ocfs2_vol_state -{ - VOLUME_INIT = 0, - VOLUME_MOUNTED, - VOLUME_MOUNTED_QUOTAS, - VOLUME_DISMOUNTED, - VOLUME_DISABLED -}; - -struct ocfs2_alloc_stats -{ - atomic_t moves; - atomic_t local_data; - atomic_t bitmap_data; - atomic_t bg_allocs; - atomic_t bg_extends; -}; - -enum ocfs2_local_alloc_state -{ - OCFS2_LA_UNUSED = 0, /* Local alloc will never be used for - * this mountpoint. */ - OCFS2_LA_ENABLED, /* Local alloc is in use. */ - OCFS2_LA_THROTTLED, /* Local alloc is in use, but number - * of bits has been reduced. */ - OCFS2_LA_DISABLED /* Local alloc has temporarily been - * disabled. */ -}; - -enum ocfs2_mount_options -{ - OCFS2_MOUNT_HB_LOCAL = 1 << 0, /* Local heartbeat */ - OCFS2_MOUNT_BARRIER = 1 << 1, /* Use block barriers */ - OCFS2_MOUNT_NOINTR = 1 << 2, /* Don't catch signals */ - OCFS2_MOUNT_ERRORS_PANIC = 1 << 3, /* Panic on errors */ - OCFS2_MOUNT_DATA_WRITEBACK = 1 << 4, /* No data ordering */ - OCFS2_MOUNT_LOCALFLOCKS = 1 << 5, /* No cluster aware user file locks */ - OCFS2_MOUNT_NOUSERXATTR = 1 << 6, /* No user xattr */ - OCFS2_MOUNT_INODE64 = 1 << 7, /* Allow inode numbers > 2^32 */ - OCFS2_MOUNT_POSIX_ACL = 1 << 8, /* Force POSIX access control lists */ - OCFS2_MOUNT_NO_POSIX_ACL = 1 << 9, /* Disable POSIX access - control lists */ - OCFS2_MOUNT_USRQUOTA = 1 << 10, /* We support user quotas */ - OCFS2_MOUNT_GRPQUOTA = 1 << 11, /* We support group quotas */ - OCFS2_MOUNT_COHERENCY_BUFFERED = 1 << 12, /* Allow concurrent O_DIRECT - writes */ - OCFS2_MOUNT_HB_NONE = 1 << 13, /* No heartbeat */ - OCFS2_MOUNT_HB_GLOBAL = 1 << 14, /* Global heartbeat */ -}; - -#define OCFS2_OSB_SOFT_RO 0x0001 -#define OCFS2_OSB_HARD_RO 0x0002 -#define OCFS2_OSB_ERROR_FS 0x0004 -#define OCFS2_OSB_DROP_DENTRY_LOCK_IMMED 0x0008 - -#define OCFS2_DEFAULT_ATIME_QUANTUM 60 - -struct ocfs2_journal; -struct ocfs2_slot_info; -struct ocfs2_recovery_map; -struct ocfs2_replay_map; -struct ocfs2_quota_recovery; -struct ocfs2_dentry_lock; -struct ocfs2_super -{ - struct task_struct *commit_task; - struct super_block *sb; - struct inode *root_inode; - struct inode *sys_root_inode; - struct inode *global_system_inodes[NUM_GLOBAL_SYSTEM_INODES]; - struct inode **local_system_inodes; - - struct ocfs2_slot_info *slot_info; - - u32 *slot_recovery_generations; - - spinlock_t node_map_lock; - - u64 root_blkno; - u64 system_dir_blkno; - u64 bitmap_blkno; - u32 bitmap_cpg; - u8 *uuid; - char *uuid_str; - u32 uuid_hash; - u8 *vol_label; - u64 first_cluster_group_blkno; - u32 fs_generation; - - u32 s_feature_compat; - u32 s_feature_incompat; - u32 s_feature_ro_compat; - - /* Protects s_next_generation, osb_flags and s_inode_steal_slot. - * Could protect more on osb as it's very short lived. - */ - spinlock_t osb_lock; - u32 s_next_generation; - unsigned long osb_flags; - s16 s_inode_steal_slot; - s16 s_meta_steal_slot; - atomic_t s_num_inodes_stolen; - atomic_t s_num_meta_stolen; - - unsigned long s_mount_opt; - unsigned int s_atime_quantum; - - unsigned int max_slots; - unsigned int node_num; - int slot_num; - int preferred_slot; - int s_sectsize_bits; - int s_clustersize; - int s_clustersize_bits; - unsigned int s_xattr_inline_size; - - atomic_t vol_state; - struct mutex recovery_lock; - struct ocfs2_recovery_map *recovery_map; - struct ocfs2_replay_map *replay_map; - struct task_struct *recovery_thread_task; - int disable_recovery; - wait_queue_head_t checkpoint_event; - atomic_t needs_checkpoint; - struct ocfs2_journal *journal; - unsigned long osb_commit_interval; - - struct delayed_work la_enable_wq; - - /* - * Must hold local alloc i_mutex and osb->osb_lock to change - * local_alloc_bits. Reads can be done under either lock. - */ - unsigned int local_alloc_bits; - unsigned int local_alloc_default_bits; - /* osb_clusters_at_boot can become stale! Do not trust it to - * be up to date. */ - unsigned int osb_clusters_at_boot; - - enum ocfs2_local_alloc_state local_alloc_state; /* protected - * by osb_lock */ - - struct buffer_head *local_alloc_bh; - - u64 la_last_gd; - - struct ocfs2_reservation_map osb_la_resmap; - - unsigned int osb_resv_level; - unsigned int osb_dir_resv_level; - - /* Next three fields are for local node slot recovery during - * mount. */ - int dirty; - struct ocfs2_dinode *local_alloc_copy; - struct ocfs2_quota_recovery *quota_rec; - - struct ocfs2_blockcheck_stats osb_ecc_stats; - struct ocfs2_alloc_stats alloc_stats; - char dev_str[20]; /* "major,minor" of the device */ - - u8 osb_stackflags; - - char osb_cluster_stack[OCFS2_STACK_LABEL_LEN + 1]; - struct ocfs2_cluster_connection *cconn; - struct ocfs2_lock_res osb_super_lockres; - struct ocfs2_lock_res osb_rename_lockres; - struct ocfs2_lock_res osb_nfs_sync_lockres; - struct ocfs2_dlm_debug *osb_dlm_debug; - - struct dentry *osb_debug_root; - struct dentry *osb_ctxt; - - wait_queue_head_t recovery_event; - - spinlock_t dc_task_lock; - struct task_struct *dc_task; - wait_queue_head_t dc_event; - unsigned long dc_wake_sequence; - unsigned long dc_work_sequence; - - /* - * Any thread can add locks to the list, but the downconvert - * thread is the only one allowed to remove locks. Any change - * to this rule requires updating - * ocfs2_downconvert_thread_do_work(). - */ - struct list_head blocked_lock_list; - unsigned long blocked_lock_count; - - /* List of dentry locks to release. Anyone can add locks to - * the list, ocfs2_wq processes the list */ - struct ocfs2_dentry_lock *dentry_lock_list; - struct work_struct dentry_lock_work; - - wait_queue_head_t osb_mount_event; - - /* Truncate log info */ - struct inode *osb_tl_inode; - struct buffer_head *osb_tl_bh; - struct delayed_work osb_truncate_log_wq; - /* - * How many clusters in our truncate log. - * It must be protected by osb_tl_inode->i_mutex. - */ - unsigned int truncated_clusters; - - struct ocfs2_node_map osb_recovering_orphan_dirs; - unsigned int *osb_orphan_wipes; - wait_queue_head_t osb_wipe_event; - - struct ocfs2_orphan_scan osb_orphan_scan; - - /* used to protect metaecc calculation check of xattr. */ - spinlock_t osb_xattr_lock; - - unsigned int osb_dx_mask; - u32 osb_dx_seed[4]; - - /* the group we used to allocate inodes. */ - u64 osb_inode_alloc_group; - - /* rb tree root for refcount lock. */ - struct rb_root osb_rf_lock_tree; - struct ocfs2_refcount_tree *osb_ref_tree_lru; -}; - -#define OCFS2_SB(sb) ((struct ocfs2_super *)(sb)->s_fs_info) - -/* Useful typedef for passing around journal access functions */ -typedef int (*ocfs2_journal_access_func)(handle_t *handle, - struct ocfs2_caching_info *ci, - struct buffer_head *bh, int type); - -static inline int ocfs2_should_order_data(struct inode *inode) -{ - if (!S_ISREG(inode->i_mode)) - return 0; - if (OCFS2_SB(inode->i_sb)->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) - return 0; - return 1; -} - -static inline int ocfs2_sparse_alloc(struct ocfs2_super *osb) -{ - if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC) - return 1; - return 0; -} - -static inline int ocfs2_writes_unwritten_extents(struct ocfs2_super *osb) -{ - /* - * Support for sparse files is a pre-requisite - */ - if (!ocfs2_sparse_alloc(osb)) - return 0; - - if (osb->s_feature_ro_compat & OCFS2_FEATURE_RO_COMPAT_UNWRITTEN) - return 1; - return 0; -} - -static inline int ocfs2_supports_inline_data(struct ocfs2_super *osb) -{ - if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INLINE_DATA) - return 1; - return 0; -} - -static inline int ocfs2_supports_xattr(struct ocfs2_super *osb) -{ - if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_XATTR) - return 1; - return 0; -} - -static inline int ocfs2_meta_ecc(struct ocfs2_super *osb) -{ - if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_META_ECC) - return 1; - return 0; -} - -static inline int ocfs2_supports_indexed_dirs(struct ocfs2_super *osb) -{ - if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_INDEXED_DIRS) - return 1; - return 0; -} - -static inline int ocfs2_supports_discontig_bg(struct ocfs2_super *osb) -{ - if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_DISCONTIG_BG) - return 1; - return 0; -} - -static inline unsigned int ocfs2_link_max(struct ocfs2_super *osb) -{ - if (ocfs2_supports_indexed_dirs(osb)) - return OCFS2_DX_LINK_MAX; - return OCFS2_LINK_MAX; -} - -static inline unsigned int ocfs2_read_links_count(struct ocfs2_dinode *di) -{ - u32 nlink = le16_to_cpu(di->i_links_count); - u32 hi = le16_to_cpu(di->i_links_count_hi); - - if (di->i_dyn_features & cpu_to_le16(OCFS2_INDEXED_DIR_FL)) - nlink |= (hi << OCFS2_LINKS_HI_SHIFT); - - return nlink; -} - -static inline void ocfs2_set_links_count(struct ocfs2_dinode *di, u32 nlink) -{ - u16 lo, hi; - - lo = nlink; - hi = nlink >> OCFS2_LINKS_HI_SHIFT; - - di->i_links_count = cpu_to_le16(lo); - di->i_links_count_hi = cpu_to_le16(hi); -} - -static inline void ocfs2_add_links_count(struct ocfs2_dinode *di, int n) -{ - u32 links = ocfs2_read_links_count(di); - - links += n; - - ocfs2_set_links_count(di, links); -} - -static inline int ocfs2_refcount_tree(struct ocfs2_super *osb) -{ - if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_REFCOUNT_TREE) - return 1; - return 0; -} - -/* set / clear functions because cluster events can make these happen - * in parallel so we want the transitions to be atomic. this also - * means that any future flags osb_flags must be protected by spinlock - * too! */ -static inline void ocfs2_set_osb_flag(struct ocfs2_super *osb, - unsigned long flag) -{ - spin_lock(&osb->osb_lock); - osb->osb_flags |= flag; - spin_unlock(&osb->osb_lock); -} - - -static inline unsigned long ocfs2_test_osb_flag(struct ocfs2_super *osb, - unsigned long flag) -{ - unsigned long ret; - - spin_lock(&osb->osb_lock); - ret = osb->osb_flags & flag; - spin_unlock(&osb->osb_lock); - return ret; -} - -static inline void ocfs2_set_ro_flag(struct ocfs2_super *osb, - int hard) -{ - spin_lock(&osb->osb_lock); - osb->osb_flags &= ~(OCFS2_OSB_SOFT_RO|OCFS2_OSB_HARD_RO); - if (hard) - osb->osb_flags |= OCFS2_OSB_HARD_RO; - else - osb->osb_flags |= OCFS2_OSB_SOFT_RO; - spin_unlock(&osb->osb_lock); -} - -static inline int ocfs2_is_hard_readonly(struct ocfs2_super *osb) -{ - int ret; - - spin_lock(&osb->osb_lock); - ret = osb->osb_flags & OCFS2_OSB_HARD_RO; - spin_unlock(&osb->osb_lock); - - return ret; -} - -static inline int ocfs2_is_soft_readonly(struct ocfs2_super *osb) -{ - int ret; - - spin_lock(&osb->osb_lock); - ret = osb->osb_flags & OCFS2_OSB_SOFT_RO; - spin_unlock(&osb->osb_lock); - - return ret; -} - -static inline int ocfs2_clusterinfo_valid(struct ocfs2_super *osb) -{ - return (osb->s_feature_incompat & - (OCFS2_FEATURE_INCOMPAT_USERSPACE_STACK | - OCFS2_FEATURE_INCOMPAT_CLUSTERINFO)); -} - -static inline int ocfs2_userspace_stack(struct ocfs2_super *osb) -{ - if (ocfs2_clusterinfo_valid(osb) && - memcmp(osb->osb_cluster_stack, OCFS2_CLASSIC_CLUSTER_STACK, - OCFS2_STACK_LABEL_LEN)) - return 1; - return 0; -} - -static inline int ocfs2_o2cb_stack(struct ocfs2_super *osb) -{ - if (ocfs2_clusterinfo_valid(osb) && - !memcmp(osb->osb_cluster_stack, OCFS2_CLASSIC_CLUSTER_STACK, - OCFS2_STACK_LABEL_LEN)) - return 1; - return 0; -} - -static inline int ocfs2_cluster_o2cb_global_heartbeat(struct ocfs2_super *osb) -{ - return ocfs2_o2cb_stack(osb) && - (osb->osb_stackflags & OCFS2_CLUSTER_O2CB_GLOBAL_HEARTBEAT); -} - -static inline int ocfs2_mount_local(struct ocfs2_super *osb) -{ - return (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT); -} - -static inline int ocfs2_uses_extended_slot_map(struct ocfs2_super *osb) -{ - return (osb->s_feature_incompat & - OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP); -} - - -#define OCFS2_IS_VALID_DINODE(ptr) \ - (!strcmp((ptr)->i_signature, OCFS2_INODE_SIGNATURE)) - -#define OCFS2_IS_VALID_EXTENT_BLOCK(ptr) \ - (!strcmp((ptr)->h_signature, OCFS2_EXTENT_BLOCK_SIGNATURE)) - -#define OCFS2_IS_VALID_GROUP_DESC(ptr) \ - (!strcmp((ptr)->bg_signature, OCFS2_GROUP_DESC_SIGNATURE)) - - -#define OCFS2_IS_VALID_XATTR_BLOCK(ptr) \ - (!strcmp((ptr)->xb_signature, OCFS2_XATTR_BLOCK_SIGNATURE)) - -#define OCFS2_IS_VALID_DIR_TRAILER(ptr) \ - (!strcmp((ptr)->db_signature, OCFS2_DIR_TRAILER_SIGNATURE)) - -#define OCFS2_IS_VALID_DX_ROOT(ptr) \ - (!strcmp((ptr)->dr_signature, OCFS2_DX_ROOT_SIGNATURE)) - -#define OCFS2_IS_VALID_DX_LEAF(ptr) \ - (!strcmp((ptr)->dl_signature, OCFS2_DX_LEAF_SIGNATURE)) - -#define OCFS2_IS_VALID_REFCOUNT_BLOCK(ptr) \ - (!strcmp((ptr)->rf_signature, OCFS2_REFCOUNT_BLOCK_SIGNATURE)) - -static inline unsigned long ino_from_blkno(struct super_block *sb, - u64 blkno) -{ - return (unsigned long)(blkno & (u64)ULONG_MAX); -} - -static inline u64 ocfs2_clusters_to_blocks(struct super_block *sb, - u32 clusters) -{ - int c_to_b_bits = OCFS2_SB(sb)->s_clustersize_bits - - sb->s_blocksize_bits; - - return (u64)clusters << c_to_b_bits; -} - -static inline u32 ocfs2_blocks_to_clusters(struct super_block *sb, - u64 blocks) -{ - int b_to_c_bits = OCFS2_SB(sb)->s_clustersize_bits - - sb->s_blocksize_bits; - - return (u32)(blocks >> b_to_c_bits); -} - -static inline unsigned int ocfs2_clusters_for_bytes(struct super_block *sb, - u64 bytes) -{ - int cl_bits = OCFS2_SB(sb)->s_clustersize_bits; - unsigned int clusters; - - bytes += OCFS2_SB(sb)->s_clustersize - 1; - /* OCFS2 just cannot have enough clusters to overflow this */ - clusters = (unsigned int)(bytes >> cl_bits); - - return clusters; -} - -static inline u64 ocfs2_blocks_for_bytes(struct super_block *sb, - u64 bytes) -{ - bytes += sb->s_blocksize - 1; - return bytes >> sb->s_blocksize_bits; -} - -static inline u64 ocfs2_clusters_to_bytes(struct super_block *sb, - u32 clusters) -{ - return (u64)clusters << OCFS2_SB(sb)->s_clustersize_bits; -} - -static inline u64 ocfs2_block_to_cluster_start(struct super_block *sb, - u64 blocks) -{ - int bits = OCFS2_SB(sb)->s_clustersize_bits - sb->s_blocksize_bits; - unsigned int clusters; - - clusters = ocfs2_blocks_to_clusters(sb, blocks); - return (u64)clusters << bits; -} - -static inline u64 ocfs2_align_bytes_to_clusters(struct super_block *sb, - u64 bytes) -{ - int cl_bits = OCFS2_SB(sb)->s_clustersize_bits; - unsigned int clusters; - - clusters = ocfs2_clusters_for_bytes(sb, bytes); - return (u64)clusters << cl_bits; -} - -static inline u64 ocfs2_align_bytes_to_blocks(struct super_block *sb, - u64 bytes) -{ - u64 blocks; - - blocks = ocfs2_blocks_for_bytes(sb, bytes); - return blocks << sb->s_blocksize_bits; -} - -static inline unsigned long ocfs2_align_bytes_to_sectors(u64 bytes) -{ - return (unsigned long)((bytes + 511) >> 9); -} - -static inline unsigned int ocfs2_page_index_to_clusters(struct super_block *sb, - unsigned long pg_index) -{ - u32 clusters = pg_index; - unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; - - if (unlikely(PAGE_CACHE_SHIFT > cbits)) - clusters = pg_index << (PAGE_CACHE_SHIFT - cbits); - else if (PAGE_CACHE_SHIFT < cbits) - clusters = pg_index >> (cbits - PAGE_CACHE_SHIFT); - - return clusters; -} - -/* - * Find the 1st page index which covers the given clusters. - */ -static inline pgoff_t ocfs2_align_clusters_to_page_index(struct super_block *sb, - u32 clusters) -{ - unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; - pgoff_t index = clusters; - - if (PAGE_CACHE_SHIFT > cbits) { - index = (pgoff_t)clusters >> (PAGE_CACHE_SHIFT - cbits); - } else if (PAGE_CACHE_SHIFT < cbits) { - index = (pgoff_t)clusters << (cbits - PAGE_CACHE_SHIFT); - } - - return index; -} - -static inline unsigned int ocfs2_pages_per_cluster(struct super_block *sb) -{ - unsigned int cbits = OCFS2_SB(sb)->s_clustersize_bits; - unsigned int pages_per_cluster = 1; - - if (PAGE_CACHE_SHIFT < cbits) - pages_per_cluster = 1 << (cbits - PAGE_CACHE_SHIFT); - - return pages_per_cluster; -} - -static inline unsigned int ocfs2_megabytes_to_clusters(struct super_block *sb, - unsigned int megs) -{ - BUILD_BUG_ON(OCFS2_MAX_CLUSTERSIZE > 1048576); - - return megs << (20 - OCFS2_SB(sb)->s_clustersize_bits); -} - -static inline unsigned int ocfs2_clusters_to_megabytes(struct super_block *sb, - unsigned int clusters) -{ - return clusters >> (20 - OCFS2_SB(sb)->s_clustersize_bits); -} - -static inline void _ocfs2_set_bit(unsigned int bit, unsigned long *bitmap) -{ - __set_bit_le(bit, bitmap); -} -#define ocfs2_set_bit(bit, addr) _ocfs2_set_bit((bit), (unsigned long *)(addr)) - -static inline void _ocfs2_clear_bit(unsigned int bit, unsigned long *bitmap) -{ - __clear_bit_le(bit, bitmap); -} -#define ocfs2_clear_bit(bit, addr) _ocfs2_clear_bit((bit), (unsigned long *)(addr)) - -#define ocfs2_test_bit test_bit_le -#define ocfs2_find_next_zero_bit find_next_zero_bit_le -#define ocfs2_find_next_bit find_next_bit_le - -static inline void *correct_addr_and_bit_unaligned(int *bit, void *addr) -{ -#if BITS_PER_LONG == 64 - *bit += ((unsigned long) addr & 7UL) << 3; - addr = (void *) ((unsigned long) addr & ~7UL); -#elif BITS_PER_LONG == 32 - *bit += ((unsigned long) addr & 3UL) << 3; - addr = (void *) ((unsigned long) addr & ~3UL); -#else -#error "how many bits you are?!" -#endif - return addr; -} - -static inline void ocfs2_set_bit_unaligned(int bit, void *bitmap) -{ - bitmap = correct_addr_and_bit_unaligned(&bit, bitmap); - ocfs2_set_bit(bit, bitmap); -} - -static inline void ocfs2_clear_bit_unaligned(int bit, void *bitmap) -{ - bitmap = correct_addr_and_bit_unaligned(&bit, bitmap); - ocfs2_clear_bit(bit, bitmap); -} - -static inline int ocfs2_test_bit_unaligned(int bit, void *bitmap) -{ - bitmap = correct_addr_and_bit_unaligned(&bit, bitmap); - return ocfs2_test_bit(bit, bitmap); -} - -static inline int ocfs2_find_next_zero_bit_unaligned(void *bitmap, int max, - int start) -{ - int fix = 0, ret, tmpmax; - bitmap = correct_addr_and_bit_unaligned(&fix, bitmap); - tmpmax = max + fix; - start += fix; - - ret = ocfs2_find_next_zero_bit(bitmap, tmpmax, start) - fix; - if (ret > max) - return max; - return ret; -} - -#endif /* OCFS2_H */ - |