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-rw-r--r--fs/ocfs2/ocfs2.h936
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diff --git a/fs/ocfs2/ocfs2.h b/fs/ocfs2/ocfs2.h
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+++ b/fs/ocfs2/ocfs2.h
@@ -0,0 +1,936 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/* -*- 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.
+ */
+
+#ifndef OCFS2_H
+#define OCFS2_H
+
+#include <linux/spinlock.h>
+#include <linux/sched.h>
+#include <linux/wait.h>
+#include <linux/list.h>
+#include <linux/llist.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"
+
+#include "filecheck.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 */
+
+#define OCFS2_LOCK_NONBLOCK_FINISHED (0x00001000) /* NONBLOCK cluster
+ * lock has already
+ * returned, do not block
+ * dc thread from
+ * downconverting */
+
+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 */
+ u64 ls_last; /* Last unlock time 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;
+ struct list_head l_holders;
+
+ 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 */
+ u64 l_lock_wait; /* First lock wait time */
+ 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_reco_type {
+ ORPHAN_NO_NEED_TRUNCATE = 0,
+ ORPHAN_NEED_TRUNCATE,
+};
+
+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;
+ time64_t 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;
+ u32 d_filter_secs;
+ 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 */
+
+ OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT = 1 << 15, /* Journal Async Commit */
+ OCFS2_MOUNT_ERRORS_CONT = 1 << 16, /* Return EIO to the calling process on error */
+ OCFS2_MOUNT_ERRORS_ROFS = 1 << 17, /* Change filesystem to read-only on error */
+};
+
+#define OCFS2_OSB_SOFT_RO 0x0001
+#define OCFS2_OSB_HARD_RO 0x0002
+#define OCFS2_OSB_ERROR_FS 0x0004
+#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_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;
+ 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;
+ u16 s_inode_steal_slot;
+ u16 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;
+ 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 two fields are for local node slot recovery during
+ * mount. */
+ 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];
+ char osb_cluster_name[OCFS2_CLUSTER_NAME_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 rw_semaphore nfs_sync_rwlock;
+ struct ocfs2_lock_res osb_trim_fs_lockres;
+ struct mutex obs_trim_fs_mutex;
+ struct ocfs2_dlm_debug *osb_dlm_debug;
+
+ struct dentry *osb_debug_root;
+
+ 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 dquot structures to drop last reference to */
+ struct llist_head dquot_drop_list;
+ struct work_struct dquot_drop_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;
+ atomic_t osb_tl_disable;
+ /*
+ * 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;
+
+ struct mutex system_file_mutex;
+
+ /*
+ * OCFS2 needs to schedule several different types of work which
+ * require cluster locking, disk I/O, recovery waits, etc. Since these
+ * types of work tend to be heavy we avoid using the kernel events
+ * workqueue and schedule on our own.
+ */
+ struct workqueue_struct *ocfs2_wq;
+
+ /* sysfs directory per partition */
+ struct kset *osb_dev_kset;
+
+ /* file check related stuff */
+ struct ocfs2_filecheck_sysfs_entry osb_fc_ent;
+};
+
+#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_append_dio(struct ocfs2_super *osb)
+{
+ if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_APPEND_DIO)
+ 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 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_clusters_for_blocks(struct super_block *sb,
+ u64 blocks)
+{
+ int b_to_c_bits = OCFS2_SB(sb)->s_clustersize_bits -
+ sb->s_blocksize_bits;
+
+ blocks += (1 << b_to_c_bits) - 1;
+ return (u32)(blocks >> b_to_c_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 unsigned int ocfs2_bytes_to_clusters(struct super_block *sb,
+ u64 bytes)
+{
+ int cl_bits = OCFS2_SB(sb)->s_clustersize_bits;
+ unsigned int clusters;
+
+ 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_SHIFT > cbits))
+ clusters = pg_index << (PAGE_SHIFT - cbits);
+ else if (PAGE_SHIFT < cbits)
+ clusters = pg_index >> (cbits - PAGE_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_SHIFT > cbits) {
+ index = (pgoff_t)clusters >> (PAGE_SHIFT - cbits);
+ } else if (PAGE_SHIFT < cbits) {
+ index = (pgoff_t)clusters << (cbits - PAGE_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_SHIFT < cbits)
+ pages_per_cluster = 1 << (cbits - PAGE_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 */
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-09 05:44:12 +0000