/*
- * Copyright 1996, 1997, 1998 Hans Reiser, see reiserfs/README for licensing and copyright details
+ * Copyright 1996, 1997, 1998 Hans Reiser, see reiserfs/README for
+ * licensing and copyright details
*/
#include <linux/reiserfs_fs.h>
struct reiserfs_journal_list;
-/** bitmasks for i_flags field in reiserfs-specific part of inode */
+/* bitmasks for i_flags field in reiserfs-specific part of inode */
typedef enum {
- /** this says what format of key do all items (but stat data) of
- an object have. If this is set, that format is 3.6 otherwise
- - 3.5 */
+ /*
+ * this says what format of key do all items (but stat data) of
+ * an object have. If this is set, that format is 3.6 otherwise - 3.5
+ */
i_item_key_version_mask = 0x0001,
- /** If this is unset, object has 3.5 stat data, otherwise, it has
- 3.6 stat data with 64bit size, 32bit nlink etc. */
+
+ /*
+ * If this is unset, object has 3.5 stat data, otherwise,
+ * it has 3.6 stat data with 64bit size, 32bit nlink etc.
+ */
i_stat_data_version_mask = 0x0002,
- /** file might need tail packing on close */
+
+ /* file might need tail packing on close */
i_pack_on_close_mask = 0x0004,
- /** don't pack tail of file */
+
+ /* don't pack tail of file */
i_nopack_mask = 0x0008,
- /** If those is set, "safe link" was created for this file during
- truncate or unlink. Safe link is used to avoid leakage of disk
- space on crash with some files open, but unlinked. */
+
+ /*
+ * If either of these are set, "safe link" was created for this
+ * file during truncate or unlink. Safe link is used to avoid
+ * leakage of disk space on crash with some files open, but unlinked.
+ */
i_link_saved_unlink_mask = 0x0010,
i_link_saved_truncate_mask = 0x0020,
+
i_has_xattr_dir = 0x0040,
i_data_log = 0x0080,
} reiserfs_inode_flags;
struct reiserfs_inode_info {
__u32 i_key[4]; /* key is still 4 32 bit integers */
- /** transient inode flags that are never stored on disk. Bitmasks
- for this field are defined above. */
+
+ /*
+ * transient inode flags that are never stored on disk. Bitmasks
+ * for this field are defined above.
+ */
__u32 i_flags;
- __u32 i_first_direct_byte; // offset of first byte stored in direct item.
+ /* offset of first byte stored in direct item. */
+ __u32 i_first_direct_byte;
/* copy of persistent inode flags read from sd_attrs. */
__u32 i_attrs;
- int i_prealloc_block; /* first unused block of a sequence of unused blocks */
+ /* first unused block of a sequence of unused blocks */
+ int i_prealloc_block;
int i_prealloc_count; /* length of that sequence */
- struct list_head i_prealloc_list; /* per-transaction list of inodes which
- * have preallocated blocks */
- unsigned new_packing_locality:1; /* new_packig_locality is created; new blocks
- * for the contents of this directory should be
- * displaced */
+ /* per-transaction list of inodes which have preallocated blocks */
+ struct list_head i_prealloc_list;
- /* we use these for fsync or O_SYNC to decide which transaction
- ** needs to be committed in order for this inode to be properly
- ** flushed */
+ /*
+ * new_packing_locality is created; new blocks for the contents
+ * of this directory should be displaced
+ */
+ unsigned new_packing_locality:1;
+
+ /*
+ * we use these for fsync or O_SYNC to decide which transaction
+ * needs to be committed in order for this inode to be properly
+ * flushed
+ */
unsigned int i_trans_id;
+
struct reiserfs_journal_list *i_jl;
atomic_t openers;
struct mutex tailpack;
#ifdef CONFIG_REISERFS_FS_XATTR
struct rw_semaphore i_xattr_sem;
#endif
+#ifdef CONFIG_QUOTA
+ struct dquot *i_dquot[MAXQUOTAS];
+#endif
+
struct inode vfs_inode;
};
reiserfs_attrs_cleared = 0x00000001,
} reiserfs_super_block_flags;
-/* struct reiserfs_super_block accessors/mutators
- * since this is a disk structure, it will always be in
- * little endian format. */
+/*
+ * struct reiserfs_super_block accessors/mutators since this is a disk
+ * structure, it will always be in little endian format.
+ */
#define sb_block_count(sbp) (le32_to_cpu((sbp)->s_v1.s_block_count))
#define set_sb_block_count(sbp,v) ((sbp)->s_v1.s_block_count = cpu_to_le32(v))
#define sb_free_blocks(sbp) (le32_to_cpu((sbp)->s_v1.s_free_blocks))
/* LOGGING -- */
-/* These all interelate for performance.
-**
-** If the journal block count is smaller than n transactions, you lose speed.
-** I don't know what n is yet, I'm guessing 8-16.
-**
-** typical transaction size depends on the application, how often fsync is
-** called, and how many metadata blocks you dirty in a 30 second period.
-** The more small files (<16k) you use, the larger your transactions will
-** be.
-**
-** If your journal fills faster than dirty buffers get flushed to disk, it must flush them before allowing the journal
-** to wrap, which slows things down. If you need high speed meta data updates, the journal should be big enough
-** to prevent wrapping before dirty meta blocks get to disk.
-**
-** If the batch max is smaller than the transaction max, you'll waste space at the end of the journal
-** because journal_end sets the next transaction to start at 0 if the next transaction has any chance of wrapping.
-**
-** The large the batch max age, the better the speed, and the more meta data changes you'll lose after a crash.
-**
-*/
+/*
+ * These all interelate for performance.
+ *
+ * If the journal block count is smaller than n transactions, you lose speed.
+ * I don't know what n is yet, I'm guessing 8-16.
+ *
+ * typical transaction size depends on the application, how often fsync is
+ * called, and how many metadata blocks you dirty in a 30 second period.
+ * The more small files (<16k) you use, the larger your transactions will
+ * be.
+ *
+ * If your journal fills faster than dirty buffers get flushed to disk, it
+ * must flush them before allowing the journal to wrap, which slows things
+ * down. If you need high speed meta data updates, the journal should be
+ * big enough to prevent wrapping before dirty meta blocks get to disk.
+ *
+ * If the batch max is smaller than the transaction max, you'll waste space
+ * at the end of the journal because journal_end sets the next transaction
+ * to start at 0 if the next transaction has any chance of wrapping.
+ *
+ * The large the batch max age, the better the speed, and the more meta
+ * data changes you'll lose after a crash.
+ */
/* don't mess with these for a while */
- /* we have a node size define somewhere in reiserfs_fs.h. -Hans */
+/* we have a node size define somewhere in reiserfs_fs.h. -Hans */
#define JOURNAL_BLOCK_SIZE 4096 /* BUG gotta get rid of this */
#define JOURNAL_MAX_CNODE 1500 /* max cnodes to allocate. */
#define JOURNAL_HASH_SIZE 8192
-#define JOURNAL_NUM_BITMAPS 5 /* number of copies of the bitmaps to have floating. Must be >= 2 */
-
-/* One of these for every block in every transaction
-** Each one is in two hash tables. First, a hash of the current transaction, and after journal_end, a
-** hash of all the in memory transactions.
-** next and prev are used by the current transaction (journal_hash).
-** hnext and hprev are used by journal_list_hash. If a block is in more than one transaction, the journal_list_hash
-** links it in multiple times. This allows flush_journal_list to remove just the cnode belonging
-** to a given transaction.
-*/
+
+/* number of copies of the bitmaps to have floating. Must be >= 2 */
+#define JOURNAL_NUM_BITMAPS 5
+
+/*
+ * One of these for every block in every transaction
+ * Each one is in two hash tables. First, a hash of the current transaction,
+ * and after journal_end, a hash of all the in memory transactions.
+ * next and prev are used by the current transaction (journal_hash).
+ * hnext and hprev are used by journal_list_hash. If a block is in more
+ * than one transaction, the journal_list_hash links it in multiple times.
+ * This allows flush_journal_list to remove just the cnode belonging to a
+ * given transaction.
+ */
struct reiserfs_journal_cnode {
struct buffer_head *bh; /* real buffer head */
struct super_block *sb; /* dev of real buffer head */
- __u32 blocknr; /* block number of real buffer head, == 0 when buffer on disk */
+
+ /* block number of real buffer head, == 0 when buffer on disk */
+ __u32 blocknr;
+
unsigned long state;
- struct reiserfs_journal_list *jlist; /* journal list this cnode lives in */
+
+ /* journal list this cnode lives in */
+ struct reiserfs_journal_list *jlist;
+
struct reiserfs_journal_cnode *next; /* next in transaction list */
struct reiserfs_journal_cnode *prev; /* prev in transaction list */
struct reiserfs_journal_cnode *hprev; /* prev in hash list */
};
/*
-** one of these for each transaction. The most important part here is the j_realblock.
-** this list of cnodes is used to hash all the blocks in all the commits, to mark all the
-** real buffer heads dirty once all the commits hit the disk,
-** and to make sure every real block in a transaction is on disk before allowing the log area
-** to be overwritten */
+ * one of these for each transaction. The most important part here is the
+ * j_realblock. this list of cnodes is used to hash all the blocks in all
+ * the commits, to mark all the real buffer heads dirty once all the commits
+ * hit the disk, and to make sure every real block in a transaction is on
+ * disk before allowing the log area to be overwritten
+ */
struct reiserfs_journal_list {
unsigned long j_start;
unsigned long j_state;
unsigned long j_len;
atomic_t j_nonzerolen;
atomic_t j_commit_left;
- atomic_t j_older_commits_done; /* all commits older than this on disk */
+
+ /* all commits older than this on disk */
+ atomic_t j_older_commits_done;
+
struct mutex j_commit_mutex;
unsigned int j_trans_id;
time_t j_timestamp;
/* time ordered list of all active transactions */
struct list_head j_list;
- /* time ordered list of all transactions we haven't tried to flush yet */
+ /*
+ * time ordered list of all transactions we haven't tried
+ * to flush yet
+ */
struct list_head j_working_list;
/* list of tail conversion targets in need of flush before commit */
struct list_head j_tail_bh_list;
+
/* list of data=ordered buffers in need of flush before commit */
struct list_head j_bh_list;
int j_refcount;
struct reiserfs_journal {
struct buffer_head **j_ap_blocks; /* journal blocks on disk */
- struct reiserfs_journal_cnode *j_last; /* newest journal block */
- struct reiserfs_journal_cnode *j_first; /* oldest journal block. start here for traverse */
+ /* newest journal block */
+ struct reiserfs_journal_cnode *j_last;
+
+ /* oldest journal block. start here for traverse */
+ struct reiserfs_journal_cnode *j_first;
struct block_device *j_dev_bd;
fmode_t j_dev_mode;
- int j_1st_reserved_block; /* first block on s_dev of reserved area journal */
+
+ /* first block on s_dev of reserved area journal */
+ int j_1st_reserved_block;
unsigned long j_state;
unsigned int j_trans_id;
unsigned long j_mount_id;
- unsigned long j_start; /* start of current waiting commit (index into j_ap_blocks) */
+
+ /* start of current waiting commit (index into j_ap_blocks) */
+ unsigned long j_start;
unsigned long j_len; /* length of current waiting commit */
- unsigned long j_len_alloc; /* number of buffers requested by journal_begin() */
+
+ /* number of buffers requested by journal_begin() */
+ unsigned long j_len_alloc;
+
atomic_t j_wcount; /* count of writers for current commit */
- unsigned long j_bcount; /* batch count. allows turning X transactions into 1 */
- unsigned long j_first_unflushed_offset; /* first unflushed transactions offset */
- unsigned j_last_flush_trans_id; /* last fully flushed journal timestamp */
+
+ /* batch count. allows turning X transactions into 1 */
+ unsigned long j_bcount;
+
+ /* first unflushed transactions offset */
+ unsigned long j_first_unflushed_offset;
+
+ /* last fully flushed journal timestamp */
+ unsigned j_last_flush_trans_id;
+
struct buffer_head *j_header_bh;
time_t j_trans_start_time; /* time this transaction started */
struct mutex j_mutex;
struct mutex j_flush_mutex;
- wait_queue_head_t j_join_wait; /* wait for current transaction to finish before starting new one */
- atomic_t j_jlock; /* lock for j_join_wait */
+
+ /* wait for current transaction to finish before starting new one */
+ wait_queue_head_t j_join_wait;
+
+ atomic_t j_jlock; /* lock for j_join_wait */
int j_list_bitmap_index; /* number of next list bitmap to use */
- int j_must_wait; /* no more journal begins allowed. MUST sleep on j_join_wait */
- int j_next_full_flush; /* next journal_end will flush all journal list */
- int j_next_async_flush; /* next journal_end will flush all async commits */
+
+ /* no more journal begins allowed. MUST sleep on j_join_wait */
+ int j_must_wait;
+
+ /* next journal_end will flush all journal list */
+ int j_next_full_flush;
+
+ /* next journal_end will flush all async commits */
+ int j_next_async_flush;
int j_cnode_used; /* number of cnodes on the used list */
int j_cnode_free; /* number of cnodes on the free list */
- unsigned int j_trans_max; /* max number of blocks in a transaction. */
- unsigned int j_max_batch; /* max number of blocks to batch into a trans */
- unsigned int j_max_commit_age; /* in seconds, how old can an async commit be */
- unsigned int j_max_trans_age; /* in seconds, how old can a transaction be */
- unsigned int j_default_max_commit_age; /* the default for the max commit age */
+ /* max number of blocks in a transaction. */
+ unsigned int j_trans_max;
+
+ /* max number of blocks to batch into a trans */
+ unsigned int j_max_batch;
+
+ /* in seconds, how old can an async commit be */
+ unsigned int j_max_commit_age;
+
+ /* in seconds, how old can a transaction be */
+ unsigned int j_max_trans_age;
+
+ /* the default for the max commit age */
+ unsigned int j_default_max_commit_age;
struct reiserfs_journal_cnode *j_cnode_free_list;
- struct reiserfs_journal_cnode *j_cnode_free_orig; /* orig pointer returned from vmalloc */
+
+ /* orig pointer returned from vmalloc */
+ struct reiserfs_journal_cnode *j_cnode_free_orig;
struct reiserfs_journal_list *j_current_jl;
int j_free_bitmap_nodes;
/* list of all active transactions */
struct list_head j_journal_list;
+
/* lists that haven't been touched by writeback attempts */
struct list_head j_working_list;
- struct reiserfs_list_bitmap j_list_bitmap[JOURNAL_NUM_BITMAPS]; /* array of bitmaps to record the deleted blocks */
- struct reiserfs_journal_cnode *j_hash_table[JOURNAL_HASH_SIZE]; /* hash table for real buffer heads in current trans */
- struct reiserfs_journal_cnode *j_list_hash_table[JOURNAL_HASH_SIZE]; /* hash table for all the real buffer heads in all
- the transactions */
- struct list_head j_prealloc_list; /* list of inodes which have preallocated blocks */
+ /* hash table for real buffer heads in current trans */
+ struct reiserfs_journal_cnode *j_hash_table[JOURNAL_HASH_SIZE];
+
+ /* hash table for all the real buffer heads in all the transactions */
+ struct reiserfs_journal_cnode *j_list_hash_table[JOURNAL_HASH_SIZE];
+
+ /* array of bitmaps to record the deleted blocks */
+ struct reiserfs_list_bitmap j_list_bitmap[JOURNAL_NUM_BITMAPS];
+
+ /* list of inodes which have preallocated blocks */
+ struct list_head j_prealloc_list;
int j_persistent_trans;
unsigned long j_max_trans_size;
unsigned long j_max_batch_size;
enum journal_state_bits {
J_WRITERS_BLOCKED = 1, /* set when new writers not allowed */
- J_WRITERS_QUEUED, /* set when log is full due to too many writers */
- J_ABORTED, /* set when log is aborted */
+ J_WRITERS_QUEUED, /* set when log is full due to too many writers */
+ J_ABORTED, /* set when log is aborted */
};
-#define JOURNAL_DESC_MAGIC "ReIsErLB" /* ick. magic string to find desc blocks in the journal */
+/* ick. magic string to find desc blocks in the journal */
+#define JOURNAL_DESC_MAGIC "ReIsErLB"
typedef __u32(*hashf_t) (const signed char *, int);
stat_cnt_t leaked_oid;
stat_cnt_t leaves_removable;
- /* balances per level. Use explicit 5 as MAX_HEIGHT is not visible yet. */
+ /*
+ * balances per level.
+ * Use explicit 5 as MAX_HEIGHT is not visible yet.
+ */
stat_cnt_t balance_at[5]; /* XXX */
/* sbk == search_by_key */
stat_cnt_t sbk_read_at[5]; /* XXX */
} reiserfs_proc_info_data_t;
#endif
+/* Number of quota types we support */
+#define REISERFS_MAXQUOTAS 2
+
/* reiserfs union of in-core super block data */
struct reiserfs_sb_info {
- struct buffer_head *s_sbh; /* Buffer containing the super block */
- /* both the comment and the choice of
- name are unclear for s_rs -Hans */
- struct reiserfs_super_block *s_rs; /* Pointer to the super block in the buffer */
+ /* Buffer containing the super block */
+ struct buffer_head *s_sbh;
+
+ /* Pointer to the on-disk super block in the buffer */
+ struct reiserfs_super_block *s_rs;
struct reiserfs_bitmap_info *s_ap_bitmap;
- struct reiserfs_journal *s_journal; /* pointer to journal information */
+
+ /* pointer to journal information */
+ struct reiserfs_journal *s_journal;
+
unsigned short s_mount_state; /* reiserfs state (valid, invalid) */
/* Serialize writers access, replace the old bkl */
struct mutex lock;
+
/* Owner of the lock (can be recursive) */
struct task_struct *lock_owner;
+
/* Depth of the lock, start from -1 like the bkl */
int lock_depth;
+ struct workqueue_struct *commit_wq;
+
/* Comment? -Hans */
void (*end_io_handler) (struct buffer_head *, int);
- hashf_t s_hash_function; /* pointer to function which is used
- to sort names in directory. Set on
- mount */
- unsigned long s_mount_opt; /* reiserfs's mount options are set
- here (currently - NOTAIL, NOLOG,
- REPLAYONLY) */
-
- struct { /* This is a structure that describes block allocator options */
- unsigned long bits; /* Bitfield for enable/disable kind of options */
- unsigned long large_file_size; /* size started from which we consider file to be a large one(in blocks) */
+
+ /*
+ * pointer to function which is used to sort names in directory.
+ * Set on mount
+ */
+ hashf_t s_hash_function;
+
+ /* reiserfs's mount options are set here */
+ unsigned long s_mount_opt;
+
+ /* This is a structure that describes block allocator options */
+ struct {
+ /* Bitfield for enable/disable kind of options */
+ unsigned long bits;
+
+ /*
+ * size started from which we consider file
+ * to be a large one (in blocks)
+ */
+ unsigned long large_file_size;
+
int border; /* percentage of disk, border takes */
- int preallocmin; /* Minimal file size (in blocks) starting from which we do preallocations */
- int preallocsize; /* Number of blocks we try to prealloc when file
- reaches preallocmin size (in blocks) or
- prealloc_list is empty. */
+
+ /*
+ * Minimal file size (in blocks) starting
+ * from which we do preallocations
+ */
+ int preallocmin;
+
+ /*
+ * Number of blocks we try to prealloc when file
+ * reaches preallocmin size (in blocks) or prealloc_list
+ is empty.
+ */
+ int preallocsize;
} s_alloc_options;
/* Comment? -Hans */
wait_queue_head_t s_wait;
- /* To be obsoleted soon by per buffer seals.. -Hans */
- atomic_t s_generation_counter; // increased by one every time the
- // tree gets re-balanced
- unsigned long s_properties; /* File system properties. Currently holds
- on-disk FS format */
+ /* increased by one every time the tree gets re-balanced */
+ atomic_t s_generation_counter;
+
+ /* File system properties. Currently holds on-disk FS format */
+ unsigned long s_properties;
/* session statistics */
int s_disk_reads;
int s_bmaps_without_search;
int s_direct2indirect;
int s_indirect2direct;
- /* set up when it's ok for reiserfs_read_inode2() to read from
- disk inode with nlink==0. Currently this is only used during
- finish_unfinished() processing at mount time */
+
+ /*
+ * set up when it's ok for reiserfs_read_inode2() to read from
+ * disk inode with nlink==0. Currently this is only used during
+ * finish_unfinished() processing at mount time
+ */
int s_is_unlinked_ok;
+
reiserfs_proc_info_data_t s_proc_info_data;
struct proc_dir_entry *procdir;
- int reserved_blocks; /* amount of blocks reserved for further allocations */
- spinlock_t bitmap_lock; /* this lock on now only used to protect reserved_blocks variable */
+
+ /* amount of blocks reserved for further allocations */
+ int reserved_blocks;
+
+
+ /* this lock on now only used to protect reserved_blocks variable */
+ spinlock_t bitmap_lock;
struct dentry *priv_root; /* root of /.reiserfs_priv */
struct dentry *xattr_root; /* root of /.reiserfs_priv/xattrs */
int j_errno;
spinlock_t old_work_lock; /* protects old_work and work_queued */
#ifdef CONFIG_QUOTA
- char *s_qf_names[MAXQUOTAS];
+ char *s_qf_names[REISERFS_MAXQUOTAS];
int s_jquota_fmt;
#endif
char *s_jdev; /* Stored jdev for mount option showing */
#ifdef CONFIG_REISERFS_CHECK
- struct tree_balance *cur_tb; /*
- * Detects whether more than one
- * copy of tb exists per superblock
- * as a means of checking whether
- * do_balance is executing concurrently
- * against another tree reader/writer
- * on a same mount point.
- */
+ /*
+ * Detects whether more than one copy of tb exists per superblock
+ * as a means of checking whether do_balance is executing
+ * concurrently against another tree reader/writer on a same
+ * mount point.
+ */
+ struct tree_balance *cur_tb;
#endif
};
#define REISERFS_3_6 1
#define REISERFS_OLD_FORMAT 2
-enum reiserfs_mount_options {
/* Mount options */
- REISERFS_LARGETAIL, /* large tails will be created in a session */
- REISERFS_SMALLTAIL, /* small (for files less than block size) tails will be created in a session */
- REPLAYONLY, /* replay journal and return 0. Use by fsck */
- REISERFS_CONVERT, /* -o conv: causes conversion of old
- format super block to the new
- format. If not specified - old
- partition will be dealt with in a
- manner of 3.5.x */
-
-/* -o hash={tea, rupasov, r5, detect} is meant for properly mounting
-** reiserfs disks from 3.5.19 or earlier. 99% of the time, this option
-** is not required. If the normal autodection code can't determine which
-** hash to use (because both hashes had the same value for a file)
-** use this option to force a specific hash. It won't allow you to override
-** the existing hash on the FS, so if you have a tea hash disk, and mount
-** with -o hash=rupasov, the mount will fail.
-*/
+enum reiserfs_mount_options {
+ /* large tails will be created in a session */
+ REISERFS_LARGETAIL,
+ /*
+ * small (for files less than block size) tails will
+ * be created in a session
+ */
+ REISERFS_SMALLTAIL,
+
+ /* replay journal and return 0. Use by fsck */
+ REPLAYONLY,
+
+ /*
+ * -o conv: causes conversion of old format super block to the
+ * new format. If not specified - old partition will be dealt
+ * with in a manner of 3.5.x
+ */
+ REISERFS_CONVERT,
+
+ /*
+ * -o hash={tea, rupasov, r5, detect} is meant for properly mounting
+ * reiserfs disks from 3.5.19 or earlier. 99% of the time, this
+ * option is not required. If the normal autodection code can't
+ * determine which hash to use (because both hashes had the same
+ * value for a file) use this option to force a specific hash.
+ * It won't allow you to override the existing hash on the FS, so
+ * if you have a tea hash disk, and mount with -o hash=rupasov,
+ * the mount will fail.
+ */
FORCE_TEA_HASH, /* try to force tea hash on mount */
FORCE_RUPASOV_HASH, /* try to force rupasov hash on mount */
FORCE_R5_HASH, /* try to force rupasov hash on mount */
REISERFS_DATA_ORDERED,
REISERFS_DATA_WRITEBACK,
-/* used for testing experimental features, makes benchmarking new
- features with and without more convenient, should never be used by
- users in any code shipped to users (ideally) */
+ /*
+ * used for testing experimental features, makes benchmarking new
+ * features with and without more convenient, should never be used by
+ * users in any code shipped to users (ideally)
+ */
REISERFS_NO_BORDER,
REISERFS_NO_UNHASHED_RELOCATION,
#define SB_DISK_JOURNAL_HEAD(s) (SB_JOURNAL(s)->j_header_bh->)
-/* A safe version of the "bdevname", which returns the "s_id" field of
- * a superblock or else "Null superblock" if the super block is NULL.
- */
-static inline char *reiserfs_bdevname(struct super_block *s)
-{
- return (s == NULL) ? "Null superblock" : s->s_id;
-}
-
#define reiserfs_is_journal_aborted(journal) (unlikely (__reiserfs_is_journal_aborted (journal)))
static inline int __reiserfs_is_journal_aborted(struct reiserfs_journal
*journal)
*/
void reiserfs_write_lock(struct super_block *s);
void reiserfs_write_unlock(struct super_block *s);
-int reiserfs_write_lock_once(struct super_block *s);
-void reiserfs_write_unlock_once(struct super_block *s, int lock_depth);
+int __must_check reiserfs_write_unlock_nested(struct super_block *s);
+void reiserfs_write_lock_nested(struct super_block *s, int depth);
#ifdef CONFIG_REISERFS_CHECK
void reiserfs_lock_check_recursive(struct super_block *s);
* - The inode mutex
*/
static inline void reiserfs_mutex_lock_safe(struct mutex *m,
- struct super_block *s)
+ struct super_block *s)
{
- reiserfs_lock_check_recursive(s);
- reiserfs_write_unlock(s);
+ int depth;
+
+ depth = reiserfs_write_unlock_nested(s);
mutex_lock(m);
- reiserfs_write_lock(s);
+ reiserfs_write_lock_nested(s, depth);
}
static inline void
reiserfs_mutex_lock_nested_safe(struct mutex *m, unsigned int subclass,
- struct super_block *s)
+ struct super_block *s)
{
- reiserfs_lock_check_recursive(s);
- reiserfs_write_unlock(s);
+ int depth;
+
+ depth = reiserfs_write_unlock_nested(s);
mutex_lock_nested(m, subclass);
- reiserfs_write_lock(s);
+ reiserfs_write_lock_nested(s, depth);
}
static inline void
reiserfs_down_read_safe(struct rw_semaphore *sem, struct super_block *s)
{
- reiserfs_lock_check_recursive(s);
- reiserfs_write_unlock(s);
- down_read(sem);
- reiserfs_write_lock(s);
+ int depth;
+ depth = reiserfs_write_unlock_nested(s);
+ down_read(sem);
+ reiserfs_write_lock_nested(s, depth);
}
/*
static inline void reiserfs_cond_resched(struct super_block *s)
{
if (need_resched()) {
- reiserfs_write_unlock(s);
+ int depth;
+
+ depth = reiserfs_write_unlock_nested(s);
schedule();
- reiserfs_write_lock(s);
+ reiserfs_write_lock_nested(s, depth);
}
}
struct fid;
-/* in reading the #defines, it may help to understand that they employ
- the following abbreviations:
-
- B = Buffer
- I = Item header
- H = Height within the tree (should be changed to LEV)
- N = Number of the item in the node
- STAT = stat data
- DEH = Directory Entry Header
- EC = Entry Count
- E = Entry number
- UL = Unsigned Long
- BLKH = BLocK Header
- UNFM = UNForMatted node
- DC = Disk Child
- P = Path
-
- These #defines are named by concatenating these abbreviations,
- where first comes the arguments, and last comes the return value,
- of the macro.
-
-*/
+/*
+ * in reading the #defines, it may help to understand that they employ
+ * the following abbreviations:
+ *
+ * B = Buffer
+ * I = Item header
+ * H = Height within the tree (should be changed to LEV)
+ * N = Number of the item in the node
+ * STAT = stat data
+ * DEH = Directory Entry Header
+ * EC = Entry Count
+ * E = Entry number
+ * UL = Unsigned Long
+ * BLKH = BLocK Header
+ * UNFM = UNForMatted node
+ * DC = Disk Child
+ * P = Path
+ *
+ * These #defines are named by concatenating these abbreviations,
+ * where first comes the arguments, and last comes the return value,
+ * of the macro.
+ */
#define USE_INODE_GENERATION_COUNTER
/* n must be power of 2 */
#define _ROUND_UP(x,n) (((x)+(n)-1u) & ~((n)-1u))
-// to be ok for alpha and others we have to align structures to 8 byte
-// boundary.
-// FIXME: do not change 4 by anything else: there is code which relies on that
+/*
+ * to be ok for alpha and others we have to align structures to 8 byte
+ * boundary.
+ * FIXME: do not change 4 by anything else: there is code which relies on that
+ */
#define ROUND_UP(x) _ROUND_UP(x,8LL)
-/* debug levels. Right now, CONFIG_REISERFS_CHECK means print all debug
-** messages.
-*/
+/*
+ * debug levels. Right now, CONFIG_REISERFS_CHECK means print all debug
+ * messages.
+ */
#define REISERFS_DEBUG_CODE 5 /* extra messages to help find/debug errors */
void __reiserfs_warning(struct super_block *s, const char *id,
__reiserfs_warning(s, id, __func__, fmt, ##args)
/* assertions handling */
-/** always check a condition and panic if it's false. */
+/* always check a condition and panic if it's false. */
#define __RASSERT(cond, scond, format, args...) \
do { \
if (!(cond)) \
reiserfs_panic(NULL, "assertion failure", "(" #cond ") at " \
__FILE__ ":%i:%s: " format "\n", \
- in_interrupt() ? -1 : task_pid_nr(current), \
__LINE__, __func__ , ##args); \
} while (0)
* Disk Data Structures
*/
-/***************************************************************************/
-/* SUPER BLOCK */
-/***************************************************************************/
+/***************************************************************************
+ * SUPER BLOCK *
+ ***************************************************************************/
/*
- * Structure of super block on disk, a version of which in RAM is often accessed as REISERFS_SB(s)->s_rs
- * the version in RAM is part of a larger structure containing fields never written to disk.
+ * Structure of super block on disk, a version of which in RAM is often
+ * accessed as REISERFS_SB(s)->s_rs. The version in RAM is part of a larger
+ * structure containing fields never written to disk.
*/
-#define UNSET_HASH 0 // read_super will guess about, what hash names
- // in directories were sorted with
+#define UNSET_HASH 0 /* Detect hash on disk */
#define TEA_HASH 1
#define YURA_HASH 2
#define R5_HASH 3
#define DEFAULT_HASH R5_HASH
struct journal_params {
- __le32 jp_journal_1st_block; /* where does journal start from on its
- * device */
- __le32 jp_journal_dev; /* journal device st_rdev */
- __le32 jp_journal_size; /* size of the journal */
- __le32 jp_journal_trans_max; /* max number of blocks in a transaction. */
- __le32 jp_journal_magic; /* random value made on fs creation (this
- * was sb_journal_block_count) */
- __le32 jp_journal_max_batch; /* max number of blocks to batch into a
- * trans */
- __le32 jp_journal_max_commit_age; /* in seconds, how old can an async
- * commit be */
- __le32 jp_journal_max_trans_age; /* in seconds, how old can a transaction
- * be */
+ /* where does journal start from on its * device */
+ __le32 jp_journal_1st_block;
+
+ /* journal device st_rdev */
+ __le32 jp_journal_dev;
+
+ /* size of the journal */
+ __le32 jp_journal_size;
+
+ /* max number of blocks in a transaction. */
+ __le32 jp_journal_trans_max;
+
+ /*
+ * random value made on fs creation
+ * (this was sb_journal_block_count)
+ */
+ __le32 jp_journal_magic;
+
+ /* max number of blocks to batch into a trans */
+ __le32 jp_journal_max_batch;
+
+ /* in seconds, how old can an async commit be */
+ __le32 jp_journal_max_commit_age;
+
+ /* in seconds, how old can a transaction be */
+ __le32 jp_journal_max_trans_age;
};
/* this is the super from 3.5.X, where X >= 10 */
__le32 s_root_block; /* root block number */
struct journal_params s_journal;
__le16 s_blocksize; /* block size */
- __le16 s_oid_maxsize; /* max size of object id array, see
- * get_objectid() commentary */
+
+ /* max size of object id array, see get_objectid() commentary */
+ __le16 s_oid_maxsize;
__le16 s_oid_cursize; /* current size of object id array */
- __le16 s_umount_state; /* this is set to 1 when filesystem was
- * umounted, to 2 - when not */
- char s_magic[10]; /* reiserfs magic string indicates that
- * file system is reiserfs:
- * "ReIsErFs" or "ReIsEr2Fs" or "ReIsEr3Fs" */
- __le16 s_fs_state; /* it is set to used by fsck to mark which
- * phase of rebuilding is done */
- __le32 s_hash_function_code; /* indicate, what hash function is being use
- * to sort names in a directory*/
+
+ /* this is set to 1 when filesystem was umounted, to 2 - when not */
+ __le16 s_umount_state;
+
+ /*
+ * reiserfs magic string indicates that file system is reiserfs:
+ * "ReIsErFs" or "ReIsEr2Fs" or "ReIsEr3Fs"
+ */
+ char s_magic[10];
+
+ /*
+ * it is set to used by fsck to mark which
+ * phase of rebuilding is done
+ */
+ __le16 s_fs_state;
+ /*
+ * indicate, what hash function is being use
+ * to sort names in a directory
+ */
+ __le32 s_hash_function_code;
__le16 s_tree_height; /* height of disk tree */
- __le16 s_bmap_nr; /* amount of bitmap blocks needed to address
- * each block of file system */
- __le16 s_version; /* this field is only reliable on filesystem
- * with non-standard journal */
- __le16 s_reserved_for_journal; /* size in blocks of journal area on main
- * device, we need to keep after
- * making fs with non-standard journal */
+
+ /*
+ * amount of bitmap blocks needed to address
+ * each block of file system
+ */
+ __le16 s_bmap_nr;
+
+ /*
+ * this field is only reliable on filesystem with non-standard journal
+ */
+ __le16 s_version;
+
+ /*
+ * size in blocks of journal area on main device, we need to
+ * keep after making fs with non-standard journal
+ */
+ __le16 s_reserved_for_journal;
} __attribute__ ((__packed__));
#define SB_SIZE_V1 (sizeof(struct reiserfs_super_block_v1))
struct reiserfs_super_block {
struct reiserfs_super_block_v1 s_v1;
__le32 s_inode_generation;
- __le32 s_flags; /* Right now used only by inode-attributes, if enabled */
+
+ /* Right now used only by inode-attributes, if enabled */
+ __le32 s_flags;
+
unsigned char s_uuid[16]; /* filesystem unique identifier */
unsigned char s_label[16]; /* filesystem volume label */
__le16 s_mnt_count; /* Count of mounts since last fsck */
__le16 s_max_mnt_count; /* Maximum mounts before check */
__le32 s_lastcheck; /* Timestamp of last fsck */
__le32 s_check_interval; /* Interval between checks */
- char s_unused[76]; /* zero filled by mkreiserfs and
- * reiserfs_convert_objectid_map_v1()
- * so any additions must be updated
- * there as well. */
+
+ /*
+ * zero filled by mkreiserfs and reiserfs_convert_objectid_map_v1()
+ * so any additions must be updated there as well. */
+ char s_unused[76];
} __attribute__ ((__packed__));
#define SB_SIZE (sizeof(struct reiserfs_super_block))
#define REISERFS_VERSION_1 0
#define REISERFS_VERSION_2 2
-// on-disk super block fields converted to cpu form
+/* on-disk super block fields converted to cpu form */
#define SB_DISK_SUPER_BLOCK(s) (REISERFS_SB(s)->s_rs)
#define SB_V1_DISK_SUPER_BLOCK(s) (&(SB_DISK_SUPER_BLOCK(s)->s_v1))
#define SB_BLOCKSIZE(s) \
int is_reiserfs_3_6(struct reiserfs_super_block *rs);
int is_reiserfs_jr(struct reiserfs_super_block *rs);
-/* ReiserFS leaves the first 64k unused, so that partition labels have
- enough space. If someone wants to write a fancy bootloader that
- needs more than 64k, let us know, and this will be increased in size.
- This number must be larger than than the largest block size on any
- platform, or code will break. -Hans */
+/*
+ * ReiserFS leaves the first 64k unused, so that partition labels have
+ * enough space. If someone wants to write a fancy bootloader that
+ * needs more than 64k, let us know, and this will be increased in size.
+ * This number must be larger than than the largest block size on any
+ * platform, or code will break. -Hans
+ */
#define REISERFS_DISK_OFFSET_IN_BYTES (64 * 1024)
#define REISERFS_FIRST_BLOCK unused_define
#define REISERFS_JOURNAL_OFFSET_IN_BYTES REISERFS_DISK_OFFSET_IN_BYTES
unsigned short unfm_freespace;
};
-/* there are two formats of keys: 3.5 and 3.6
- */
+/* there are two formats of keys: 3.5 and 3.6 */
#define KEY_FORMAT_3_5 0
#define KEY_FORMAT_3_6 1
return sb->s_fs_info;
}
-/* Don't trust REISERFS_SB(sb)->s_bmap_nr, it's a u16
- * which overflows on large file systems. */
+/*
+ * Don't trust REISERFS_SB(sb)->s_bmap_nr, it's a u16
+ * which overflows on large file systems.
+ */
static inline __u32 reiserfs_bmap_count(struct super_block *sb)
{
return (SB_BLOCK_COUNT(sb) - 1) / (sb->s_blocksize * 8) + 1;
return bmap_nr > ((1LL << 16) - 1);
}
-/** this says about version of key of all items (but stat data) the
- object consists of */
+/*
+ * this says about version of key of all items (but stat data) the
+ * object consists of
+ */
#define get_inode_item_key_version( inode ) \
((REISERFS_I(inode)->i_flags & i_item_key_version_mask) ? KEY_FORMAT_3_6 : KEY_FORMAT_3_5)
else \
REISERFS_I(inode)->i_flags &= ~i_stat_data_version_mask; })
-/* This is an aggressive tail suppression policy, I am hoping it
- improves our benchmarks. The principle behind it is that percentage
- space saving is what matters, not absolute space saving. This is
- non-intuitive, but it helps to understand it if you consider that the
- cost to access 4 blocks is not much more than the cost to access 1
- block, if you have to do a seek and rotate. A tail risks a
- non-linear disk access that is significant as a percentage of total
- time cost for a 4 block file and saves an amount of space that is
- less significant as a percentage of space, or so goes the hypothesis.
- -Hans */
+/*
+ * This is an aggressive tail suppression policy, I am hoping it
+ * improves our benchmarks. The principle behind it is that percentage
+ * space saving is what matters, not absolute space saving. This is
+ * non-intuitive, but it helps to understand it if you consider that the
+ * cost to access 4 blocks is not much more than the cost to access 1
+ * block, if you have to do a seek and rotate. A tail risks a
+ * non-linear disk access that is significant as a percentage of total
+ * time cost for a 4 block file and saves an amount of space that is
+ * less significant as a percentage of space, or so goes the hypothesis.
+ * -Hans
+ */
#define STORE_TAIL_IN_UNFM_S1(n_file_size,n_tail_size,n_block_size) \
(\
(!(n_tail_size)) || \
( (n_tail_size) >= (MAX_DIRECT_ITEM_LEN(n_block_size) * 3)/4) ) ) \
)
-/* Another strategy for tails, this one means only create a tail if all the
- file would fit into one DIRECT item.
- Primary intention for this one is to increase performance by decreasing
- seeking.
+/*
+ * Another strategy for tails, this one means only create a tail if all the
+ * file would fit into one DIRECT item.
+ * Primary intention for this one is to increase performance by decreasing
+ * seeking.
*/
#define STORE_TAIL_IN_UNFM_S2(n_file_size,n_tail_size,n_block_size) \
(\
#define REISERFS_VALID_FS 1
#define REISERFS_ERROR_FS 2
-//
-// there are 5 item types currently
-//
+/*
+ * there are 5 item types currently
+ */
#define TYPE_STAT_DATA 0
#define TYPE_INDIRECT 1
#define TYPE_DIRECT 2
#define TYPE_DIRENTRY 3
#define TYPE_MAXTYPE 3
-#define TYPE_ANY 15 // FIXME: comment is required
+#define TYPE_ANY 15 /* FIXME: comment is required */
-/***************************************************************************/
-/* KEY & ITEM HEAD */
-/***************************************************************************/
+/***************************************************************************
+ * KEY & ITEM HEAD *
+ ***************************************************************************/
-//
-// directories use this key as well as old files
-//
+/* * directories use this key as well as old files */
struct offset_v1 {
__le32 k_offset;
__le32 k_uniqueness;
v2->v = (v2->v & cpu_to_le64(15ULL << 60)) | cpu_to_le64(offset);
}
-/* Key of an item determines its location in the S+tree, and
- is composed of 4 components */
+/*
+ * Key of an item determines its location in the S+tree, and
+ * is composed of 4 components
+ */
struct reiserfs_key {
- __le32 k_dir_id; /* packing locality: by default parent
- directory object id */
+ /* packing locality: by default parent directory object id */
+ __le32 k_dir_id;
+
__le32 k_objectid; /* object identifier */
union {
struct offset_v1 k_offset_v1;
} __attribute__ ((__packed__));
struct in_core_key {
- __u32 k_dir_id; /* packing locality: by default parent
- directory object id */
+ /* packing locality: by default parent directory object id */
+ __u32 k_dir_id;
__u32 k_objectid; /* object identifier */
__u64 k_offset;
__u8 k_type;
struct cpu_key {
struct in_core_key on_disk_key;
int version;
- int key_length; /* 3 in all cases but direct2indirect and
- indirect2direct conversion */
+ /* 3 in all cases but direct2indirect and indirect2direct conversion */
+ int key_length;
};
-/* Our function for comparing keys can compare keys of different
- lengths. It takes as a parameter the length of the keys it is to
- compare. These defines are used in determining what is to be passed
- to it as that parameter. */
+/*
+ * Our function for comparing keys can compare keys of different
+ * lengths. It takes as a parameter the length of the keys it is to
+ * compare. These defines are used in determining what is to be passed
+ * to it as that parameter.
+ */
#define REISERFS_FULL_KEY_LEN 4
#define REISERFS_SHORT_KEY_LEN 2
#define POSITION_FOUND 1
#define POSITION_NOT_FOUND 0
-// return values for reiserfs_find_entry and search_by_entry_key
+/* return values for reiserfs_find_entry and search_by_entry_key */
#define NAME_FOUND 1
#define NAME_NOT_FOUND 0
#define GOTO_PREVIOUS_ITEM 2
#define NAME_FOUND_INVISIBLE 3
-/* Everything in the filesystem is stored as a set of items. The
- item head contains the key of the item, its free space (for
- indirect items) and specifies the location of the item itself
- within the block. */
+/*
+ * Everything in the filesystem is stored as a set of items. The
+ * item head contains the key of the item, its free space (for
+ * indirect items) and specifies the location of the item itself
+ * within the block.
+ */
struct item_head {
- /* Everything in the tree is found by searching for it based on
- * its key.*/
+ /*
+ * Everything in the tree is found by searching for it based on
+ * its key.
+ */
struct reiserfs_key ih_key;
union {
- /* The free space in the last unformatted node of an
- indirect item if this is an indirect item. This
- equals 0xFFFF iff this is a direct item or stat data
- item. Note that the key, not this field, is used to
- determine the item type, and thus which field this
- union contains. */
+ /*
+ * The free space in the last unformatted node of an
+ * indirect item if this is an indirect item. This
+ * equals 0xFFFF iff this is a direct item or stat data
+ * item. Note that the key, not this field, is used to
+ * determine the item type, and thus which field this
+ * union contains.
+ */
__le16 ih_free_space_reserved;
- /* Iff this is a directory item, this field equals the
- number of directory entries in the directory item. */
+
+ /*
+ * Iff this is a directory item, this field equals the
+ * number of directory entries in the directory item.
+ */
__le16 ih_entry_count;
} __attribute__ ((__packed__)) u;
__le16 ih_item_len; /* total size of the item body */
- __le16 ih_item_location; /* an offset to the item body
- * within the block */
- __le16 ih_version; /* 0 for all old items, 2 for new
- ones. Highest bit is set by fsck
- temporary, cleaned after all
- done */
+
+ /* an offset to the item body within the block */
+ __le16 ih_item_location;
+
+ /*
+ * 0 for all old items, 2 for new ones. Highest bit is set by fsck
+ * temporary, cleaned after all done
+ */
+ __le16 ih_version;
} __attribute__ ((__packed__));
/* size of item header */
#define IH_SIZE (sizeof(struct item_head))
#define get_ih_free_space(ih) (ih_version (ih) == KEY_FORMAT_3_6 ? 0 : ih_free_space (ih))
#define set_ih_free_space(ih,val) put_ih_free_space((ih), ((ih_version(ih) == KEY_FORMAT_3_6) ? 0 : (val)))
-/* these operate on indirect items, where you've got an array of ints
-** at a possibly unaligned location. These are a noop on ia32
-**
-** p is the array of __u32, i is the index into the array, v is the value
-** to store there.
-*/
+/*
+ * these operate on indirect items, where you've got an array of ints
+ * at a possibly unaligned location. These are a noop on ia32
+ *
+ * p is the array of __u32, i is the index into the array, v is the value
+ * to store there.
+ */
#define get_block_num(p, i) get_unaligned_le32((p) + (i))
#define put_block_num(p, i, v) put_unaligned_le32((v), (p) + (i))
-//
-// in old version uniqueness field shows key type
-//
+/* * in old version uniqueness field shows key type */
#define V1_SD_UNIQUENESS 0
#define V1_INDIRECT_UNIQUENESS 0xfffffffe
#define V1_DIRECT_UNIQUENESS 0xffffffff
#define V1_DIRENTRY_UNIQUENESS 500
-#define V1_ANY_UNIQUENESS 555 // FIXME: comment is required
+#define V1_ANY_UNIQUENESS 555 /* FIXME: comment is required */
-//
-// here are conversion routines
-//
+/* here are conversion routines */
static inline int uniqueness2type(__u32 uniqueness) CONSTF;
static inline int uniqueness2type(__u32 uniqueness)
{
}
}
-//
-// key is pointer to on disk key which is stored in le, result is cpu,
-// there is no way to get version of object from key, so, provide
-// version to these defines
-//
+/*
+ * key is pointer to on disk key which is stored in le, result is cpu,
+ * there is no way to get version of object from key, so, provide
+ * version to these defines
+ */
static inline loff_t le_key_k_offset(int version,
const struct reiserfs_key *key)
{
static inline loff_t le_key_k_type(int version, const struct reiserfs_key *key)
{
- return (version == KEY_FORMAT_3_5) ?
- uniqueness2type(le32_to_cpu(key->u.k_offset_v1.k_uniqueness)) :
- offset_v2_k_type(&(key->u.k_offset_v2));
+ if (version == KEY_FORMAT_3_5) {
+ loff_t val = le32_to_cpu(key->u.k_offset_v1.k_uniqueness);
+ return uniqueness2type(val);
+ } else
+ return offset_v2_k_type(&(key->u.k_offset_v2));
}
static inline loff_t le_ih_k_type(const struct item_head *ih)
static inline void set_le_key_k_offset(int version, struct reiserfs_key *key,
loff_t offset)
{
- (version == KEY_FORMAT_3_5) ? (void)(key->u.k_offset_v1.k_offset = cpu_to_le32(offset)) : /* jdm check */
- (void)(set_offset_v2_k_offset(&(key->u.k_offset_v2), offset));
+ if (version == KEY_FORMAT_3_5)
+ key->u.k_offset_v1.k_offset = cpu_to_le32(offset);
+ else
+ set_offset_v2_k_offset(&key->u.k_offset_v2, offset);
+}
+
+static inline void add_le_key_k_offset(int version, struct reiserfs_key *key,
+ loff_t offset)
+{
+ set_le_key_k_offset(version, key,
+ le_key_k_offset(version, key) + offset);
+}
+
+static inline void add_le_ih_k_offset(struct item_head *ih, loff_t offset)
+{
+ add_le_key_k_offset(ih_version(ih), &(ih->ih_key), offset);
}
static inline void set_le_ih_k_offset(struct item_head *ih, loff_t offset)
static inline void set_le_key_k_type(int version, struct reiserfs_key *key,
int type)
{
- (version == KEY_FORMAT_3_5) ?
- (void)(key->u.k_offset_v1.k_uniqueness =
- cpu_to_le32(type2uniqueness(type)))
- : (void)(set_offset_v2_k_type(&(key->u.k_offset_v2), type));
+ if (version == KEY_FORMAT_3_5) {
+ type = type2uniqueness(type);
+ key->u.k_offset_v1.k_uniqueness = cpu_to_le32(type);
+ } else
+ set_offset_v2_k_type(&key->u.k_offset_v2, type);
}
static inline void set_le_ih_k_type(struct item_head *ih, int type)
return le_key_k_type(version, key) == TYPE_STAT_DATA;
}
-//
-// item header has version.
-//
+/* item header has version. */
static inline int is_direntry_le_ih(struct item_head *ih)
{
return is_direntry_le_key(ih_version(ih), &ih->ih_key);
return is_statdata_le_key(ih_version(ih), &ih->ih_key);
}
-//
-// key is pointer to cpu key, result is cpu
-//
+/* key is pointer to cpu key, result is cpu */
static inline loff_t cpu_key_k_offset(const struct cpu_key *key)
{
return key->on_disk_key.k_offset;
extern struct reiserfs_key root_key;
-/*
+/*
* Picture represents a leaf of the S+tree
* ______________________________________________________
* | | Array of | | |
* |______|_______________|___________________|___________|
*/
-/* Header of a disk block. More precisely, header of a formatted leaf
- or internal node, and not the header of an unformatted node. */
+/*
+ * Header of a disk block. More precisely, header of a formatted leaf
+ * or internal node, and not the header of an unformatted node.
+ */
struct block_head {
__le16 blk_level; /* Level of a block in the tree. */
__le16 blk_nr_item; /* Number of keys/items in a block. */
__le16 blk_free_space; /* Block free space in bytes. */
__le16 blk_reserved;
/* dump this in v4/planA */
- struct reiserfs_key blk_right_delim_key; /* kept only for compatibility */
+
+ /* kept only for compatibility */
+ struct reiserfs_key blk_right_delim_key;
};
#define BLKH_SIZE (sizeof(struct block_head))
#define blkh_right_delim_key(p_blkh) ((p_blkh)->blk_right_delim_key)
#define set_blkh_right_delim_key(p_blkh,val) ((p_blkh)->blk_right_delim_key = val)
+/* values for blk_level field of the struct block_head */
+
/*
- * values for blk_level field of the struct block_head
+ * When node gets removed from the tree its blk_level is set to FREE_LEVEL.
+ * It is then used to see whether the node is still in the tree
*/
-
-#define FREE_LEVEL 0 /* when node gets removed from the tree its
- blk_level is set to FREE_LEVEL. It is then
- used to see whether the node is still in the
- tree */
+#define FREE_LEVEL 0
#define DISK_LEAF_NODE_LEVEL 1 /* Leaf node level. */
-/* Given the buffer head of a formatted node, resolve to the block head of that node. */
+/*
+ * Given the buffer head of a formatted node, resolve to the
+ * block head of that node.
+ */
#define B_BLK_HEAD(bh) ((struct block_head *)((bh)->b_data))
/* Number of items that are in buffer. */
#define B_NR_ITEMS(bh) (blkh_nr_item(B_BLK_HEAD(bh)))
#define B_IS_KEYS_LEVEL(bh) (B_LEVEL(bh) > DISK_LEAF_NODE_LEVEL \
&& B_LEVEL(bh) <= MAX_HEIGHT)
-/***************************************************************************/
-/* STAT DATA */
-/***************************************************************************/
+/***************************************************************************
+ * STAT DATA *
+ ***************************************************************************/
-//
-// old stat data is 32 bytes long. We are going to distinguish new one by
-// different size
-//
+/*
+ * old stat data is 32 bytes long. We are going to distinguish new one by
+ * different size
+*/
struct stat_data_v1 {
__le16 sd_mode; /* file type, permissions */
__le16 sd_nlink; /* number of hard links */
__le32 sd_size; /* file size */
__le32 sd_atime; /* time of last access */
__le32 sd_mtime; /* time file was last modified */
- __le32 sd_ctime; /* time inode (stat data) was last changed (except changes to sd_atime and sd_mtime) */
+
+ /*
+ * time inode (stat data) was last changed
+ * (except changes to sd_atime and sd_mtime)
+ */
+ __le32 sd_ctime;
union {
__le32 sd_rdev;
__le32 sd_blocks; /* number of blocks file uses */
} __attribute__ ((__packed__)) u;
- __le32 sd_first_direct_byte; /* first byte of file which is stored
- in a direct item: except that if it
- equals 1 it is a symlink and if it
- equals ~(__u32)0 there is no
- direct item. The existence of this
- field really grates on me. Let's
- replace it with a macro based on
- sd_size and our tail suppression
- policy. Someday. -Hans */
+
+ /*
+ * first byte of file which is stored in a direct item: except that if
+ * it equals 1 it is a symlink and if it equals ~(__u32)0 there is no
+ * direct item. The existence of this field really grates on me.
+ * Let's replace it with a macro based on sd_size and our tail
+ * suppression policy. Someday. -Hans
+ */
+ __le32 sd_first_direct_byte;
} __attribute__ ((__packed__));
#define SD_V1_SIZE (sizeof(struct stat_data_v1))
/* inode flags stored in sd_attrs (nee sd_reserved) */
-/* we want common flags to have the same values as in ext2,
- so chattr(1) will work without problems */
+/*
+ * we want common flags to have the same values as in ext2,
+ * so chattr(1) will work without problems
+ */
#define REISERFS_IMMUTABLE_FL FS_IMMUTABLE_FL
#define REISERFS_APPEND_FL FS_APPEND_FL
#define REISERFS_SYNC_FL FS_SYNC_FL
REISERFS_COMPR_FL | \
REISERFS_NOTAIL_FL )
-/* Stat Data on disk (reiserfs version of UFS disk inode minus the
- address blocks) */
+/*
+ * Stat Data on disk (reiserfs version of UFS disk inode minus the
+ * address blocks)
+ */
struct stat_data {
__le16 sd_mode; /* file type, permissions */
__le16 sd_attrs; /* persistent inode flags */
__le32 sd_gid; /* group */
__le32 sd_atime; /* time of last access */
__le32 sd_mtime; /* time file was last modified */
- __le32 sd_ctime; /* time inode (stat data) was last changed (except changes to sd_atime and sd_mtime) */
+
+ /*
+ * time inode (stat data) was last changed
+ * (except changes to sd_atime and sd_mtime)
+ */
+ __le32 sd_ctime;
__le32 sd_blocks;
union {
__le32 sd_rdev;
__le32 sd_generation;
- //__le32 sd_first_direct_byte;
- /* first byte of file which is stored in a
- direct item: except that if it equals 1
- it is a symlink and if it equals
- ~(__u32)0 there is no direct item. The
- existence of this field really grates
- on me. Let's replace it with a macro
- based on sd_size and our tail
- suppression policy? */
} __attribute__ ((__packed__)) u;
} __attribute__ ((__packed__));
-//
-// this is 44 bytes long
-//
+
+/* this is 44 bytes long */
#define SD_SIZE (sizeof(struct stat_data))
#define SD_V2_SIZE SD_SIZE
#define stat_data_v2(ih) (ih_version (ih) == KEY_FORMAT_3_6)
#define sd_v2_attrs(sdp) (le16_to_cpu((sdp)->sd_attrs))
#define set_sd_v2_attrs(sdp,v) ((sdp)->sd_attrs = cpu_to_le16(v))
-/***************************************************************************/
-/* DIRECTORY STRUCTURE */
-/***************************************************************************/
-/*
- Picture represents the structure of directory items
- ________________________________________________
- | Array of | | | | | |
- | directory |N-1| N-2 | .... | 1st |0th|
- | entry headers | | | | | |
- |_______________|___|_____|________|_______|___|
- <---- directory entries ------>
-
- First directory item has k_offset component 1. We store "." and ".."
- in one item, always, we never split "." and ".." into differing
- items. This makes, among other things, the code for removing
- directories simpler. */
+/***************************************************************************
+ * DIRECTORY STRUCTURE *
+ ***************************************************************************/
+/*
+ * Picture represents the structure of directory items
+ * ________________________________________________
+ * | Array of | | | | | |
+ * | directory |N-1| N-2 | .... | 1st |0th|
+ * | entry headers | | | | | |
+ * |_______________|___|_____|________|_______|___|
+ * <---- directory entries ------>
+ *
+ * First directory item has k_offset component 1. We store "." and ".."
+ * in one item, always, we never split "." and ".." into differing
+ * items. This makes, among other things, the code for removing
+ * directories simpler.
+ */
#define SD_OFFSET 0
#define SD_UNIQUENESS 0
#define DOT_OFFSET 1
#define DOT_DOT_OFFSET 2
#define DIRENTRY_UNIQUENESS 500
-/* */
#define FIRST_ITEM_OFFSET 1
/*
- Q: How to get key of object pointed to by entry from entry?
-
- A: Each directory entry has its header. This header has deh_dir_id and deh_objectid fields, those are key
- of object, entry points to */
+ * Q: How to get key of object pointed to by entry from entry?
+ *
+ * A: Each directory entry has its header. This header has deh_dir_id
+ * and deh_objectid fields, those are key of object, entry points to
+ */
-/* NOT IMPLEMENTED:
- Directory will someday contain stat data of object */
+/*
+ * NOT IMPLEMENTED:
+ * Directory will someday contain stat data of object
+ */
struct reiserfs_de_head {
__le32 deh_offset; /* third component of the directory entry key */
- __le32 deh_dir_id; /* objectid of the parent directory of the object, that is referenced
- by directory entry */
- __le32 deh_objectid; /* objectid of the object, that is referenced by directory entry */
+
+ /*
+ * objectid of the parent directory of the object, that is referenced
+ * by directory entry
+ */
+ __le32 deh_dir_id;
+
+ /* objectid of the object, that is referenced by directory entry */
+ __le32 deh_objectid;
__le16 deh_location; /* offset of name in the whole item */
- __le16 deh_state; /* whether 1) entry contains stat data (for future), and 2) whether
- entry is hidden (unlinked) */
+
+ /*
+ * whether 1) entry contains stat data (for future), and
+ * 2) whether entry is hidden (unlinked)
+ */
+ __le16 deh_state;
} __attribute__ ((__packed__));
#define DEH_SIZE sizeof(struct reiserfs_de_head)
#define deh_offset(p_deh) (le32_to_cpu((p_deh)->deh_offset))
# define ADDR_UNALIGNED_BITS (3)
#endif
-/* These are only used to manipulate deh_state.
+/*
+ * These are only used to manipulate deh_state.
* Because of this, we'll use the ext2_ bit routines,
- * since they are little endian */
+ * since they are little endian
+ */
#ifdef ADDR_UNALIGNED_BITS
# define aligned_address(addr) ((void *)((long)(addr) & ~((1UL << ADDR_UNALIGNED_BITS) - 1)))
extern void make_empty_dir_item(char *body, __le32 dirid, __le32 objid,
__le32 par_dirid, __le32 par_objid);
-/* array of the entry headers */
- /* get item body */
-#define B_I_PITEM(bh,ih) ( (bh)->b_data + ih_location(ih) )
-#define B_I_DEH(bh,ih) ((struct reiserfs_de_head *)(B_I_PITEM(bh,ih)))
-
-/* length of the directory entry in directory item. This define
- calculates length of i-th directory entry using directory entry
- locations from dir entry head. When it calculates length of 0-th
- directory entry, it uses length of whole item in place of entry
- location of the non-existent following entry in the calculation.
- See picture above.*/
-/*
-#define I_DEH_N_ENTRY_LENGTH(ih,deh,i) \
-((i) ? (deh_location((deh)-1) - deh_location((deh))) : (ih_item_len((ih)) - deh_location((deh))))
-*/
-static inline int entry_length(const struct buffer_head *bh,
- const struct item_head *ih, int pos_in_item)
-{
- struct reiserfs_de_head *deh;
-
- deh = B_I_DEH(bh, ih) + pos_in_item;
- if (pos_in_item)
- return deh_location(deh - 1) - deh_location(deh);
-
- return ih_item_len(ih) - deh_location(deh);
-}
-
-/* number of entries in the directory item, depends on ENTRY_COUNT being at the start of directory dynamic data. */
-#define I_ENTRY_COUNT(ih) (ih_entry_count((ih)))
-
-/* name by bh, ih and entry_num */
-#define B_I_E_NAME(bh,ih,entry_num) ((char *)(bh->b_data + ih_location(ih) + deh_location(B_I_DEH(bh,ih)+(entry_num))))
-
-// two entries per block (at least)
+/* two entries per block (at least) */
#define REISERFS_MAX_NAME(block_size) 255
-/* this structure is used for operations on directory entries. It is
- not a disk structure. */
-/* When reiserfs_find_entry or search_by_entry_key find directory
- entry, they return filled reiserfs_dir_entry structure */
+/*
+ * this structure is used for operations on directory entries. It is
+ * not a disk structure.
+ *
+ * When reiserfs_find_entry or search_by_entry_key find directory
+ * entry, they return filled reiserfs_dir_entry structure
+ */
struct reiserfs_dir_entry {
struct buffer_head *de_bh;
int de_item_num;
struct cpu_key de_entry_key;
};
-/* these defines are useful when a particular member of a reiserfs_dir_entry is needed */
+/*
+ * these defines are useful when a particular member of
+ * a reiserfs_dir_entry is needed
+ */
/* pointer to file name, stored in entry */
-#define B_I_DEH_ENTRY_FILE_NAME(bh,ih,deh) (B_I_PITEM (bh, ih) + deh_location(deh))
+#define B_I_DEH_ENTRY_FILE_NAME(bh, ih, deh) \
+ (ih_item_body(bh, ih) + deh_location(deh))
/* length of name */
#define I_DEH_N_ENTRY_FILE_NAME_LENGTH(ih,deh,entry_num) \
* |______|_______________|___________________|___________|
*/
-/***************************************************************************/
-/* DISK CHILD */
-/***************************************************************************/
-/* Disk child pointer: The pointer from an internal node of the tree
- to a node that is on disk. */
+/***************************************************************************
+ * DISK CHILD *
+ ***************************************************************************/
+/*
+ * Disk child pointer:
+ * The pointer from an internal node of the tree to a node that is on disk.
+ */
struct disk_child {
__le32 dc_block_number; /* Disk child's block number. */
__le16 dc_size; /* Disk child's used space. */
#define MAX_NR_KEY(bh) ( (MAX_CHILD_SIZE(bh)-DC_SIZE)/(KEY_SIZE+DC_SIZE) )
#define MIN_NR_KEY(bh) (MAX_NR_KEY(bh)/2)
-/***************************************************************************/
-/* PATH STRUCTURES AND DEFINES */
-/***************************************************************************/
+/***************************************************************************
+ * PATH STRUCTURES AND DEFINES *
+ ***************************************************************************/
-/* Search_by_key fills up the path from the root to the leaf as it descends the tree looking for the
- key. It uses reiserfs_bread to try to find buffers in the cache given their block number. If it
- does not find them in the cache it reads them from disk. For each node search_by_key finds using
- reiserfs_bread it then uses bin_search to look through that node. bin_search will find the
- position of the block_number of the next node if it is looking through an internal node. If it
- is looking through a leaf node bin_search will find the position of the item which has key either
- equal to given key, or which is the maximal key less than the given key. */
+/*
+ * search_by_key fills up the path from the root to the leaf as it descends
+ * the tree looking for the key. It uses reiserfs_bread to try to find
+ * buffers in the cache given their block number. If it does not find
+ * them in the cache it reads them from disk. For each node search_by_key
+ * finds using reiserfs_bread it then uses bin_search to look through that
+ * node. bin_search will find the position of the block_number of the next
+ * node if it is looking through an internal node. If it is looking through
+ * a leaf node bin_search will find the position of the item which has key
+ * either equal to given key, or which is the maximal key less than the
+ * given key.
+ */
struct path_element {
- struct buffer_head *pe_buffer; /* Pointer to the buffer at the path in the tree. */
- int pe_position; /* Position in the tree node which is placed in the */
- /* buffer above. */
+ /* Pointer to the buffer at the path in the tree. */
+ struct buffer_head *pe_buffer;
+ /* Position in the tree node which is placed in the buffer above. */
+ int pe_position;
};
-#define MAX_HEIGHT 5 /* maximal height of a tree. don't change this without changing JOURNAL_PER_BALANCE_CNT */
-#define EXTENDED_MAX_HEIGHT 7 /* Must be equals MAX_HEIGHT + FIRST_PATH_ELEMENT_OFFSET */
-#define FIRST_PATH_ELEMENT_OFFSET 2 /* Must be equal to at least 2. */
-
-#define ILLEGAL_PATH_ELEMENT_OFFSET 1 /* Must be equal to FIRST_PATH_ELEMENT_OFFSET - 1 */
-#define MAX_FEB_SIZE 6 /* this MUST be MAX_HEIGHT + 1. See about FEB below */
-
-/* We need to keep track of who the ancestors of nodes are. When we
- perform a search we record which nodes were visited while
- descending the tree looking for the node we searched for. This list
- of nodes is called the path. This information is used while
- performing balancing. Note that this path information may become
- invalid, and this means we must check it when using it to see if it
- is still valid. You'll need to read search_by_key and the comments
- in it, especially about decrement_counters_in_path(), to understand
- this structure.
-
-Paths make the code so much harder to work with and debug.... An
-enormous number of bugs are due to them, and trying to write or modify
-code that uses them just makes my head hurt. They are based on an
-excessive effort to avoid disturbing the precious VFS code.:-( The
-gods only know how we are going to SMP the code that uses them.
-znodes are the way! */
+/*
+ * maximal height of a tree. don't change this without
+ * changing JOURNAL_PER_BALANCE_CNT
+ */
+#define MAX_HEIGHT 5
+
+/* Must be equals MAX_HEIGHT + FIRST_PATH_ELEMENT_OFFSET */
+#define EXTENDED_MAX_HEIGHT 7
+
+/* Must be equal to at least 2. */
+#define FIRST_PATH_ELEMENT_OFFSET 2
+
+/* Must be equal to FIRST_PATH_ELEMENT_OFFSET - 1 */
+#define ILLEGAL_PATH_ELEMENT_OFFSET 1
+
+/* this MUST be MAX_HEIGHT + 1. See about FEB below */
+#define MAX_FEB_SIZE 6
+
+/*
+ * We need to keep track of who the ancestors of nodes are. When we
+ * perform a search we record which nodes were visited while
+ * descending the tree looking for the node we searched for. This list
+ * of nodes is called the path. This information is used while
+ * performing balancing. Note that this path information may become
+ * invalid, and this means we must check it when using it to see if it
+ * is still valid. You'll need to read search_by_key and the comments
+ * in it, especially about decrement_counters_in_path(), to understand
+ * this structure.
+ *
+ * Paths make the code so much harder to work with and debug.... An
+ * enormous number of bugs are due to them, and trying to write or modify
+ * code that uses them just makes my head hurt. They are based on an
+ * excessive effort to avoid disturbing the precious VFS code.:-( The
+ * gods only know how we are going to SMP the code that uses them.
+ * znodes are the way!
+ */
#define PATH_READA 0x1 /* do read ahead */
#define PATH_READA_BACK 0x2 /* read backwards */
struct treepath {
int path_length; /* Length of the array above. */
int reada;
- struct path_element path_elements[EXTENDED_MAX_HEIGHT]; /* Array of the path elements. */
+ /* Array of the path elements. */
+ struct path_element path_elements[EXTENDED_MAX_HEIGHT];
int pos_in_item;
};
#define PATH_OFFSET_POSITION(path, n_offset) (PATH_OFFSET_PELEMENT(path, n_offset)->pe_position)
#define PATH_PLAST_BUFFER(path) (PATH_OFFSET_PBUFFER((path), (path)->path_length))
- /* you know, to the person who didn't
- write this the macro name does not
- at first suggest what it does.
- Maybe POSITION_FROM_PATH_END? Or
- maybe we should just focus on
- dumping paths... -Hans */
+
+/*
+ * you know, to the person who didn't write this the macro name does not
+ * at first suggest what it does. Maybe POSITION_FROM_PATH_END? Or
+ * maybe we should just focus on dumping paths... -Hans
+ */
#define PATH_LAST_POSITION(path) (PATH_OFFSET_POSITION((path), (path)->path_length))
-#define PATH_PITEM_HEAD(path) B_N_PITEM_HEAD(PATH_PLAST_BUFFER(path), PATH_LAST_POSITION(path))
+/*
+ * in do_balance leaf has h == 0 in contrast with path structure,
+ * where root has level == 0. That is why we need these defines
+ */
+
+/* tb->S[h] */
+#define PATH_H_PBUFFER(path, h) \
+ PATH_OFFSET_PBUFFER(path, path->path_length - (h))
+
+/* tb->F[h] or tb->S[0]->b_parent */
+#define PATH_H_PPARENT(path, h) PATH_H_PBUFFER(path, (h) + 1)
-/* in do_balance leaf has h == 0 in contrast with path structure,
- where root has level == 0. That is why we need these defines */
-#define PATH_H_PBUFFER(path, h) PATH_OFFSET_PBUFFER (path, path->path_length - (h)) /* tb->S[h] */
-#define PATH_H_PPARENT(path, h) PATH_H_PBUFFER (path, (h) + 1) /* tb->F[h] or tb->S[0]->b_parent */
-#define PATH_H_POSITION(path, h) PATH_OFFSET_POSITION (path, path->path_length - (h))
-#define PATH_H_B_ITEM_ORDER(path, h) PATH_H_POSITION(path, h + 1) /* tb->S[h]->b_item_order */
+#define PATH_H_POSITION(path, h) \
+ PATH_OFFSET_POSITION(path, path->path_length - (h))
+
+/* tb->S[h]->b_item_order */
+#define PATH_H_B_ITEM_ORDER(path, h) PATH_H_POSITION(path, h + 1)
#define PATH_H_PATH_OFFSET(path, n_h) ((path)->path_length - (n_h))
+static inline void *reiserfs_node_data(const struct buffer_head *bh)
+{
+ return bh->b_data + sizeof(struct block_head);
+}
+
+/* get key from internal node */
+static inline struct reiserfs_key *internal_key(struct buffer_head *bh,
+ int item_num)
+{
+ struct reiserfs_key *key = reiserfs_node_data(bh);
+
+ return &key[item_num];
+}
+
+/* get the item header from leaf node */
+static inline struct item_head *item_head(const struct buffer_head *bh,
+ int item_num)
+{
+ struct item_head *ih = reiserfs_node_data(bh);
+
+ return &ih[item_num];
+}
+
+/* get the key from leaf node */
+static inline struct reiserfs_key *leaf_key(const struct buffer_head *bh,
+ int item_num)
+{
+ return &item_head(bh, item_num)->ih_key;
+}
+
+static inline void *ih_item_body(const struct buffer_head *bh,
+ const struct item_head *ih)
+{
+ return bh->b_data + ih_location(ih);
+}
+
+/* get item body from leaf node */
+static inline void *item_body(const struct buffer_head *bh, int item_num)
+{
+ return ih_item_body(bh, item_head(bh, item_num));
+}
+
+static inline struct item_head *tp_item_head(const struct treepath *path)
+{
+ return item_head(PATH_PLAST_BUFFER(path), PATH_LAST_POSITION(path));
+}
+
+static inline void *tp_item_body(const struct treepath *path)
+{
+ return item_body(PATH_PLAST_BUFFER(path), PATH_LAST_POSITION(path));
+}
+
#define get_last_bh(path) PATH_PLAST_BUFFER(path)
-#define get_ih(path) PATH_PITEM_HEAD(path)
#define get_item_pos(path) PATH_LAST_POSITION(path)
-#define get_item(path) ((void *)B_N_PITEM(PATH_PLAST_BUFFER(path), PATH_LAST_POSITION (path)))
#define item_moved(ih,path) comp_items(ih, path)
#define path_changed(ih,path) comp_items (ih, path)
-/***************************************************************************/
-/* MISC */
-/***************************************************************************/
+/* array of the entry headers */
+ /* get item body */
+#define B_I_DEH(bh, ih) ((struct reiserfs_de_head *)(ih_item_body(bh, ih)))
+
+/*
+ * length of the directory entry in directory item. This define
+ * calculates length of i-th directory entry using directory entry
+ * locations from dir entry head. When it calculates length of 0-th
+ * directory entry, it uses length of whole item in place of entry
+ * location of the non-existent following entry in the calculation.
+ * See picture above.
+ */
+static inline int entry_length(const struct buffer_head *bh,
+ const struct item_head *ih, int pos_in_item)
+{
+ struct reiserfs_de_head *deh;
+
+ deh = B_I_DEH(bh, ih) + pos_in_item;
+ if (pos_in_item)
+ return deh_location(deh - 1) - deh_location(deh);
+
+ return ih_item_len(ih) - deh_location(deh);
+}
+
+/***************************************************************************
+ * MISC *
+ ***************************************************************************/
/* Size of pointer to the unformatted node. */
#define UNFM_P_SIZE (sizeof(unp_t))
#define UNFM_P_SHIFT 2
-// in in-core inode key is stored on le form
+/* in in-core inode key is stored on le form */
#define INODE_PKEY(inode) ((struct reiserfs_key *)(REISERFS_I(inode)->i_key))
#define MAX_UL_INT 0xffffffff
return (loff_t) ((~(__u64) 0) >> 4);
}
-/*#define MAX_KEY_UNIQUENESS MAX_UL_INT*/
#define MAX_KEY_OBJECTID MAX_UL_INT
#define MAX_B_NUM MAX_UL_INT
/* the purpose is to detect overflow of an unsigned short */
#define REISERFS_LINK_MAX (MAX_US_INT - 1000)
-/* The following defines are used in reiserfs_insert_item and reiserfs_append_item */
-#define REISERFS_KERNEL_MEM 0 /* reiserfs kernel memory mode */
-#define REISERFS_USER_MEM 1 /* reiserfs user memory mode */
+/*
+ * The following defines are used in reiserfs_insert_item
+ * and reiserfs_append_item
+ */
+#define REISERFS_KERNEL_MEM 0 /* kernel memory mode */
+#define REISERFS_USER_MEM 1 /* user memory mode */
#define fs_generation(s) (REISERFS_SB(s)->s_generation_counter)
#define get_generation(s) atomic_read (&fs_generation(s))
__fs_changed(gen, s); \
})
-/***************************************************************************/
-/* FIXATE NODES */
-/***************************************************************************/
+/***************************************************************************
+ * FIXATE NODES *
+ ***************************************************************************/
#define VI_TYPE_LEFT_MERGEABLE 1
#define VI_TYPE_RIGHT_MERGEABLE 2
-/* To make any changes in the tree we always first find node, that
- contains item to be changed/deleted or place to insert a new
- item. We call this node S. To do balancing we need to decide what
- we will shift to left/right neighbor, or to a new node, where new
- item will be etc. To make this analysis simpler we build virtual
- node. Virtual node is an array of items, that will replace items of
- node S. (For instance if we are going to delete an item, virtual
- node does not contain it). Virtual node keeps information about
- item sizes and types, mergeability of first and last items, sizes
- of all entries in directory item. We use this array of items when
- calculating what we can shift to neighbors and how many nodes we
- have to have if we do not any shiftings, if we shift to left/right
- neighbor or to both. */
+/*
+ * To make any changes in the tree we always first find node, that
+ * contains item to be changed/deleted or place to insert a new
+ * item. We call this node S. To do balancing we need to decide what
+ * we will shift to left/right neighbor, or to a new node, where new
+ * item will be etc. To make this analysis simpler we build virtual
+ * node. Virtual node is an array of items, that will replace items of
+ * node S. (For instance if we are going to delete an item, virtual
+ * node does not contain it). Virtual node keeps information about
+ * item sizes and types, mergeability of first and last items, sizes
+ * of all entries in directory item. We use this array of items when
+ * calculating what we can shift to neighbors and how many nodes we
+ * have to have if we do not any shiftings, if we shift to left/right
+ * neighbor or to both.
+ */
struct virtual_item {
- int vi_index; // index in the array of item operations
- unsigned short vi_type; // left/right mergeability
- unsigned short vi_item_len; /* length of item that it will have after balancing */
+ int vi_index; /* index in the array of item operations */
+ unsigned short vi_type; /* left/right mergeability */
+
+ /* length of item that it will have after balancing */
+ unsigned short vi_item_len;
+
struct item_head *vi_ih;
- const char *vi_item; // body of item (old or new)
- const void *vi_new_data; // 0 always but paste mode
- void *vi_uarea; // item specific area
+ const char *vi_item; /* body of item (old or new) */
+ const void *vi_new_data; /* 0 always but paste mode */
+ void *vi_uarea; /* item specific area */
};
struct virtual_node {
- char *vn_free_ptr; /* this is a pointer to the free space in the buffer */
+ /* this is a pointer to the free space in the buffer */
+ char *vn_free_ptr;
+
unsigned short vn_nr_item; /* number of items in virtual node */
- short vn_size; /* size of node , that node would have if it has unlimited size and no balancing is performed */
- short vn_mode; /* mode of balancing (paste, insert, delete, cut) */
+
+ /*
+ * size of node , that node would have if it has
+ * unlimited size and no balancing is performed
+ */
+ short vn_size;
+
+ /* mode of balancing (paste, insert, delete, cut) */
+ short vn_mode;
+
short vn_affected_item_num;
short vn_pos_in_item;
- struct item_head *vn_ins_ih; /* item header of inserted item, 0 for other modes */
+
+ /* item header of inserted item, 0 for other modes */
+ struct item_head *vn_ins_ih;
const void *vn_data;
- struct virtual_item *vn_vi; /* array of items (including a new one, excluding item to be deleted) */
+
+ /* array of items (including a new one, excluding item to be deleted) */
+ struct virtual_item *vn_vi;
};
/* used by directory items when creating virtual nodes */
__u16 entry_sizes[1];
} __attribute__ ((__packed__));
-/***************************************************************************/
-/* TREE BALANCE */
-/***************************************************************************/
+/***************************************************************************
+ * TREE BALANCE *
+ ***************************************************************************/
-/* This temporary structure is used in tree balance algorithms, and
- constructed as we go to the extent that its various parts are
- needed. It contains arrays of nodes that can potentially be
- involved in the balancing of node S, and parameters that define how
- each of the nodes must be balanced. Note that in these algorithms
- for balancing the worst case is to need to balance the current node
- S and the left and right neighbors and all of their parents plus
- create a new node. We implement S1 balancing for the leaf nodes
- and S0 balancing for the internal nodes (S1 and S0 are defined in
- our papers.)*/
+/*
+ * This temporary structure is used in tree balance algorithms, and
+ * constructed as we go to the extent that its various parts are
+ * needed. It contains arrays of nodes that can potentially be
+ * involved in the balancing of node S, and parameters that define how
+ * each of the nodes must be balanced. Note that in these algorithms
+ * for balancing the worst case is to need to balance the current node
+ * S and the left and right neighbors and all of their parents plus
+ * create a new node. We implement S1 balancing for the leaf nodes
+ * and S0 balancing for the internal nodes (S1 and S0 are defined in
+ * our papers.)
+ */
-#define MAX_FREE_BLOCK 7 /* size of the array of buffers to free at end of do_balance */
+/* size of the array of buffers to free at end of do_balance */
+#define MAX_FREE_BLOCK 7
/* maximum number of FEB blocknrs on a single level */
#define MAX_AMOUNT_NEEDED 2
struct super_block *tb_sb;
struct reiserfs_transaction_handle *transaction_handle;
struct treepath *tb_path;
- struct buffer_head *L[MAX_HEIGHT]; /* array of left neighbors of nodes in the path */
- struct buffer_head *R[MAX_HEIGHT]; /* array of right neighbors of nodes in the path */
- struct buffer_head *FL[MAX_HEIGHT]; /* array of fathers of the left neighbors */
- struct buffer_head *FR[MAX_HEIGHT]; /* array of fathers of the right neighbors */
- struct buffer_head *CFL[MAX_HEIGHT]; /* array of common parents of center node and its left neighbor */
- struct buffer_head *CFR[MAX_HEIGHT]; /* array of common parents of center node and its right neighbor */
-
- struct buffer_head *FEB[MAX_FEB_SIZE]; /* array of empty buffers. Number of buffers in array equals
- cur_blknum. */
+
+ /* array of left neighbors of nodes in the path */
+ struct buffer_head *L[MAX_HEIGHT];
+
+ /* array of right neighbors of nodes in the path */
+ struct buffer_head *R[MAX_HEIGHT];
+
+ /* array of fathers of the left neighbors */
+ struct buffer_head *FL[MAX_HEIGHT];
+
+ /* array of fathers of the right neighbors */
+ struct buffer_head *FR[MAX_HEIGHT];
+ /* array of common parents of center node and its left neighbor */
+ struct buffer_head *CFL[MAX_HEIGHT];
+
+ /* array of common parents of center node and its right neighbor */
+ struct buffer_head *CFR[MAX_HEIGHT];
+
+ /*
+ * array of empty buffers. Number of buffers in array equals
+ * cur_blknum.
+ */
+ struct buffer_head *FEB[MAX_FEB_SIZE];
struct buffer_head *used[MAX_FEB_SIZE];
struct buffer_head *thrown[MAX_FEB_SIZE];
- int lnum[MAX_HEIGHT]; /* array of number of items which must be
- shifted to the left in order to balance the
- current node; for leaves includes item that
- will be partially shifted; for internal
- nodes, it is the number of child pointers
- rather than items. It includes the new item
- being created. The code sometimes subtracts
- one to get the number of wholly shifted
- items for other purposes. */
- int rnum[MAX_HEIGHT]; /* substitute right for left in comment above */
- int lkey[MAX_HEIGHT]; /* array indexed by height h mapping the key delimiting L[h] and
- S[h] to its item number within the node CFL[h] */
- int rkey[MAX_HEIGHT]; /* substitute r for l in comment above */
- int insert_size[MAX_HEIGHT]; /* the number of bytes by we are trying to add or remove from
- S[h]. A negative value means removing. */
- int blknum[MAX_HEIGHT]; /* number of nodes that will replace node S[h] after
- balancing on the level h of the tree. If 0 then S is
- being deleted, if 1 then S is remaining and no new nodes
- are being created, if 2 or 3 then 1 or 2 new nodes is
- being created */
+
+ /*
+ * array of number of items which must be shifted to the left in
+ * order to balance the current node; for leaves includes item that
+ * will be partially shifted; for internal nodes, it is the number
+ * of child pointers rather than items. It includes the new item
+ * being created. The code sometimes subtracts one to get the
+ * number of wholly shifted items for other purposes.
+ */
+ int lnum[MAX_HEIGHT];
+
+ /* substitute right for left in comment above */
+ int rnum[MAX_HEIGHT];
+
+ /*
+ * array indexed by height h mapping the key delimiting L[h] and
+ * S[h] to its item number within the node CFL[h]
+ */
+ int lkey[MAX_HEIGHT];
+
+ /* substitute r for l in comment above */
+ int rkey[MAX_HEIGHT];
+
+ /*
+ * the number of bytes by we are trying to add or remove from
+ * S[h]. A negative value means removing.
+ */
+ int insert_size[MAX_HEIGHT];
+
+ /*
+ * number of nodes that will replace node S[h] after balancing
+ * on the level h of the tree. If 0 then S is being deleted,
+ * if 1 then S is remaining and no new nodes are being created,
+ * if 2 or 3 then 1 or 2 new nodes is being created
+ */
+ int blknum[MAX_HEIGHT];
/* fields that are used only for balancing leaves of the tree */
- int cur_blknum; /* number of empty blocks having been already allocated */
- int s0num; /* number of items that fall into left most node when S[0] splits */
- int s1num; /* number of items that fall into first new node when S[0] splits */
- int s2num; /* number of items that fall into second new node when S[0] splits */
- int lbytes; /* number of bytes which can flow to the left neighbor from the left */
- /* most liquid item that cannot be shifted from S[0] entirely */
- /* if -1 then nothing will be partially shifted */
- int rbytes; /* number of bytes which will flow to the right neighbor from the right */
- /* most liquid item that cannot be shifted from S[0] entirely */
- /* if -1 then nothing will be partially shifted */
- int s1bytes; /* number of bytes which flow to the first new node when S[0] splits */
- /* note: if S[0] splits into 3 nodes, then items do not need to be cut */
- int s2bytes;
- struct buffer_head *buf_to_free[MAX_FREE_BLOCK]; /* buffers which are to be freed after do_balance finishes by unfix_nodes */
- char *vn_buf; /* kmalloced memory. Used to create
- virtual node and keep map of
- dirtied bitmap blocks */
+
+ /* number of empty blocks having been already allocated */
+ int cur_blknum;
+
+ /* number of items that fall into left most node when S[0] splits */
+ int s0num;
+
+ /*
+ * number of bytes which can flow to the left neighbor from the left
+ * most liquid item that cannot be shifted from S[0] entirely
+ * if -1 then nothing will be partially shifted
+ */
+ int lbytes;
+
+ /*
+ * number of bytes which will flow to the right neighbor from the right
+ * most liquid item that cannot be shifted from S[0] entirely
+ * if -1 then nothing will be partially shifted
+ */
+ int rbytes;
+
+
+ /*
+ * index into the array of item headers in
+ * S[0] of the affected item
+ */
+ int item_pos;
+
+ /* new nodes allocated to hold what could not fit into S */
+ struct buffer_head *S_new[2];
+
+ /*
+ * number of items that will be placed into nodes in S_new
+ * when S[0] splits
+ */
+ int snum[2];
+
+ /*
+ * number of bytes which flow to nodes in S_new when S[0] splits
+ * note: if S[0] splits into 3 nodes, then items do not need to be cut
+ */
+ int sbytes[2];
+
+ int pos_in_item;
+ int zeroes_num;
+
+ /*
+ * buffers which are to be freed after do_balance finishes
+ * by unfix_nodes
+ */
+ struct buffer_head *buf_to_free[MAX_FREE_BLOCK];
+
+ /*
+ * kmalloced memory. Used to create virtual node and keep
+ * map of dirtied bitmap blocks
+ */
+ char *vn_buf;
+
int vn_buf_size; /* size of the vn_buf */
- struct virtual_node *tb_vn; /* VN starts after bitmap of bitmap blocks */
- int fs_gen; /* saved value of `reiserfs_generation' counter
- see FILESYSTEM_CHANGED() macro in reiserfs_fs.h */
+ /* VN starts after bitmap of bitmap blocks */
+ struct virtual_node *tb_vn;
+
+ /*
+ * saved value of `reiserfs_generation' counter see
+ * FILESYSTEM_CHANGED() macro in reiserfs_fs.h
+ */
+ int fs_gen;
+
#ifdef DISPLACE_NEW_PACKING_LOCALITIES
- struct in_core_key key; /* key pointer, to pass to block allocator or
- another low-level subsystem */
+ /*
+ * key pointer, to pass to block allocator or
+ * another low-level subsystem
+ */
+ struct in_core_key key;
#endif
};
/* When inserting an item. */
#define M_INSERT 'i'
-/* When inserting into (directories only) or appending onto an already
- existent item. */
+/*
+ * When inserting into (directories only) or appending onto an already
+ * existent item.
+ */
#define M_PASTE 'p'
/* When deleting an item. */
#define M_DELETE 'd'
/* When truncating an item or removing an entry from a (directory) item. */
-#define M_CUT 'c'
+#define M_CUT 'c'
/* used when balancing on leaf level skipped (in reiserfsck) */
#define M_INTERNAL 'n'
-/* When further balancing is not needed, then do_balance does not need
- to be called. */
-#define M_SKIP_BALANCING 's'
+/*
+ * When further balancing is not needed, then do_balance does not need
+ * to be called.
+ */
+#define M_SKIP_BALANCING 's'
#define M_CONVERT 'v'
/* modes of leaf_move_items */
#define FIRST_TO_LAST 0
#define LAST_TO_FIRST 1
-/* used in do_balance for passing parent of node information that has
- been gotten from tb struct */
+/*
+ * used in do_balance for passing parent of node information that has
+ * been gotten from tb struct
+ */
struct buffer_info {
struct tree_balance *tb;
struct buffer_head *bi_bh;
return bi ? sb_from_tb(bi->tb) : NULL;
}
-/* there are 4 types of items: stat data, directory item, indirect, direct.
-+-------------------+------------+--------------+------------+
-| | k_offset | k_uniqueness | mergeable? |
-+-------------------+------------+--------------+------------+
-| stat data | 0 | 0 | no |
-+-------------------+------------+--------------+------------+
-| 1st directory item| DOT_OFFSET |DIRENTRY_UNIQUENESS| no |
-| non 1st directory | hash value | | yes |
-| item | | | |
-+-------------------+------------+--------------+------------+
-| indirect item | offset + 1 |TYPE_INDIRECT | if this is not the first indirect item of the object
-+-------------------+------------+--------------+------------+
-| direct item | offset + 1 |TYPE_DIRECT | if not this is not the first direct item of the object
-+-------------------+------------+--------------+------------+
+/*
+ * there are 4 types of items: stat data, directory item, indirect, direct.
+ * +-------------------+------------+--------------+------------+
+ * | | k_offset | k_uniqueness | mergeable? |
+ * +-------------------+------------+--------------+------------+
+ * | stat data | 0 | 0 | no |
+ * +-------------------+------------+--------------+------------+
+ * | 1st directory item| DOT_OFFSET | DIRENTRY_ .. | no |
+ * | non 1st directory | hash value | UNIQUENESS | yes |
+ * | item | | | |
+ * +-------------------+------------+--------------+------------+
+ * | indirect item | offset + 1 |TYPE_INDIRECT | [1] |
+ * +-------------------+------------+--------------+------------+
+ * | direct item | offset + 1 |TYPE_DIRECT | [2] |
+ * +-------------------+------------+--------------+------------+
+ *
+ * [1] if this is not the first indirect item of the object
+ * [2] if this is not the first direct item of the object
*/
struct item_operations {
/* number of blocks pointed to by the indirect item */
#define I_UNFM_NUM(ih) (ih_item_len(ih) / UNFM_P_SIZE)
-/* the used space within the unformatted node corresponding to pos within the item pointed to by ih */
+/*
+ * the used space within the unformatted node corresponding
+ * to pos within the item pointed to by ih
+ */
#define I_POS_UNFM_SIZE(ih,pos,size) (((pos) == I_UNFM_NUM(ih) - 1 ) ? (size) - ih_free_space(ih) : (size))
-/* number of bytes contained by the direct item or the unformatted nodes the indirect item points to */
-
-/* get the item header */
-#define B_N_PITEM_HEAD(bh,item_num) ( (struct item_head * )((bh)->b_data + BLKH_SIZE) + (item_num) )
-
-/* get key */
-#define B_N_PDELIM_KEY(bh,item_num) ( (struct reiserfs_key * )((bh)->b_data + BLKH_SIZE) + (item_num) )
-
-/* get the key */
-#define B_N_PKEY(bh,item_num) ( &(B_N_PITEM_HEAD(bh,item_num)->ih_key) )
-
-/* get item body */
-#define B_N_PITEM(bh,item_num) ( (bh)->b_data + ih_location(B_N_PITEM_HEAD((bh),(item_num))))
-
-/* get the stat data by the buffer header and the item order */
-#define B_N_STAT_DATA(bh,nr) \
-( (struct stat_data *)((bh)->b_data + ih_location(B_N_PITEM_HEAD((bh),(nr))) ) )
+/*
+ * number of bytes contained by the direct item or the
+ * unformatted nodes the indirect item points to
+ */
- /* following defines use reiserfs buffer header and item header */
+/* following defines use reiserfs buffer header and item header */
/* get stat-data */
#define B_I_STAT_DATA(bh, ih) ( (struct stat_data * )((bh)->b_data + ih_location(ih)) )
-// this is 3976 for size==4096
+/* this is 3976 for size==4096 */
#define MAX_DIRECT_ITEM_LEN(size) ((size) - BLKH_SIZE - 2*IH_SIZE - SD_SIZE - UNFM_P_SIZE)
-/* indirect items consist of entries which contain blocknrs, pos
- indicates which entry, and B_I_POS_UNFM_POINTER resolves to the
- blocknr contained by the entry pos points to */
-#define B_I_POS_UNFM_POINTER(bh,ih,pos) le32_to_cpu(*(((unp_t *)B_I_PITEM(bh,ih)) + (pos)))
-#define PUT_B_I_POS_UNFM_POINTER(bh,ih,pos, val) do {*(((unp_t *)B_I_PITEM(bh,ih)) + (pos)) = cpu_to_le32(val); } while (0)
+/*
+ * indirect items consist of entries which contain blocknrs, pos
+ * indicates which entry, and B_I_POS_UNFM_POINTER resolves to the
+ * blocknr contained by the entry pos points to
+ */
+#define B_I_POS_UNFM_POINTER(bh, ih, pos) \
+ le32_to_cpu(*(((unp_t *)ih_item_body(bh, ih)) + (pos)))
+#define PUT_B_I_POS_UNFM_POINTER(bh, ih, pos, val) \
+ (*(((unp_t *)ih_item_body(bh, ih)) + (pos)) = cpu_to_le32(val))
struct reiserfs_iget_args {
__u32 objectid;
__u32 dirid;
};
-/***************************************************************************/
-/* FUNCTION DECLARATIONS */
-/***************************************************************************/
+/***************************************************************************
+ * FUNCTION DECLARATIONS *
+ ***************************************************************************/
#define get_journal_desc_magic(bh) (bh->b_data + bh->b_size - 12)
/* first block written in a commit. */
struct reiserfs_journal_desc {
__le32 j_trans_id; /* id of commit */
- __le32 j_len; /* length of commit. len +1 is the commit block */
+
+ /* length of commit. len +1 is the commit block */
+ __le32 j_len;
+
__le32 j_mount_id; /* mount id of this trans */
__le32 j_realblock[1]; /* real locations for each block */
};
#define set_commit_trans_id(c,val) do { (c)->j_trans_id = cpu_to_le32 (val); } while (0)
#define set_commit_trans_len(c,val) do { (c)->j_len = cpu_to_le32 (val); } while (0)
-/* this header block gets written whenever a transaction is considered fully flushed, and is more recent than the
-** last fully flushed transaction. fully flushed means all the log blocks and all the real blocks are on disk,
-** and this transaction does not need to be replayed.
-*/
+/*
+ * this header block gets written whenever a transaction is considered
+ * fully flushed, and is more recent than the last fully flushed transaction.
+ * fully flushed means all the log blocks and all the real blocks are on
+ * disk, and this transaction does not need to be replayed.
+ */
struct reiserfs_journal_header {
- __le32 j_last_flush_trans_id; /* id of last fully flushed transaction */
- __le32 j_first_unflushed_offset; /* offset in the log of where to start replay after a crash */
+ /* id of last fully flushed transaction */
+ __le32 j_last_flush_trans_id;
+
+ /* offset in the log of where to start replay after a crash */
+ __le32 j_first_unflushed_offset;
+
__le32 j_mount_id;
/* 12 */ struct journal_params jh_journal;
};
/* biggest tunable defines are right here */
#define JOURNAL_BLOCK_COUNT 8192 /* number of blocks in the journal */
-#define JOURNAL_TRANS_MAX_DEFAULT 1024 /* biggest possible single transaction, don't change for now (8/3/99) */
+
+/* biggest possible single transaction, don't change for now (8/3/99) */
+#define JOURNAL_TRANS_MAX_DEFAULT 1024
#define JOURNAL_TRANS_MIN_DEFAULT 256
-#define JOURNAL_MAX_BATCH_DEFAULT 900 /* max blocks to batch into one transaction, don't make this any bigger than 900 */
+
+/*
+ * max blocks to batch into one transaction,
+ * don't make this any bigger than 900
+ */
+#define JOURNAL_MAX_BATCH_DEFAULT 900
#define JOURNAL_MIN_RATIO 2
#define JOURNAL_MAX_COMMIT_AGE 30
#define JOURNAL_MAX_TRANS_AGE 30
#define REISERFS_QUOTA_DEL_BLOCKS(s) 0
#endif
-/* both of these can be as low as 1, or as high as you want. The min is the
-** number of 4k bitmap nodes preallocated on mount. New nodes are allocated
-** as needed, and released when transactions are committed. On release, if
-** the current number of nodes is > max, the node is freed, otherwise,
-** it is put on a free list for faster use later.
+/*
+ * both of these can be as low as 1, or as high as you want. The min is the
+ * number of 4k bitmap nodes preallocated on mount. New nodes are allocated
+ * as needed, and released when transactions are committed. On release, if
+ * the current number of nodes is > max, the node is freed, otherwise,
+ * it is put on a free list for faster use later.
*/
#define REISERFS_MIN_BITMAP_NODES 10
#define REISERFS_MAX_BITMAP_NODES 100
-#define JBH_HASH_SHIFT 13 /* these are based on journal hash size of 8192 */
+/* these are based on journal hash size of 8192 */
+#define JBH_HASH_SHIFT 13
#define JBH_HASH_MASK 8191
#define _jhashfn(sb,block) \
(((block)<<(JBH_HASH_SHIFT - 6)) ^ ((block) >> 13) ^ ((block) << (JBH_HASH_SHIFT - 12))))
#define journal_hash(t,sb,block) ((t)[_jhashfn((sb),(block)) & JBH_HASH_MASK])
-// We need these to make journal.c code more readable
+/* We need these to make journal.c code more readable */
#define journal_find_get_block(s, block) __find_get_block(SB_JOURNAL(s)->j_dev_bd, block, s->s_blocksize)
#define journal_getblk(s, block) __getblk(SB_JOURNAL(s)->j_dev_bd, block, s->s_blocksize)
#define journal_bread(s, block) __bread(SB_JOURNAL(s)->j_dev_bd, block, s->s_blocksize)
enum reiserfs_bh_state_bits {
BH_JDirty = BH_PrivateStart, /* buffer is in current transaction */
BH_JDirty_wait,
- BH_JNew, /* disk block was taken off free list before
- * being in a finished transaction, or
- * written to disk. Can be reused immed. */
+ /*
+ * disk block was taken off free list before being in a
+ * finished transaction, or written to disk. Can be reused immed.
+ */
+ BH_JNew,
BH_JPrepared,
BH_JRestore_dirty,
- BH_JTest, // debugging only will go away
+ BH_JTest, /* debugging only will go away */
};
BUFFER_FNS(JDirty, journaled);
BUFFER_FNS(JTest, journal_test);
TAS_BUFFER_FNS(JTest, journal_test);
-/*
-** transaction handle which is passed around for all journal calls
-*/
+/* transaction handle which is passed around for all journal calls */
struct reiserfs_transaction_handle {
- struct super_block *t_super; /* super for this FS when journal_begin was
- called. saves calls to reiserfs_get_super
- also used by nested transactions to make
- sure they are nesting on the right FS
- _must_ be first in the handle
- */
+ /*
+ * super for this FS when journal_begin was called. saves calls to
+ * reiserfs_get_super also used by nested transactions to make
+ * sure they are nesting on the right FS _must_ be first
+ * in the handle
+ */
+ struct super_block *t_super;
+
int t_refcount;
int t_blocks_logged; /* number of blocks this writer has logged */
int t_blocks_allocated; /* number of blocks this writer allocated */
- unsigned int t_trans_id; /* sanity check, equals the current trans id */
+
+ /* sanity check, equals the current trans id */
+ unsigned int t_trans_id;
+
void *t_handle_save; /* save existing current->journal_info */
- unsigned displace_new_blocks:1; /* if new block allocation occurres, that block
- should be displaced from others */
+
+ /*
+ * if new block allocation occurres, that block
+ * should be displaced from others
+ */
+ unsigned displace_new_blocks:1;
+
struct list_head t_list;
};
-/* used to keep track of ordered and tail writes, attached to the buffer
+/*
+ * used to keep track of ordered and tail writes, attached to the buffer
* head through b_journal_head.
*/
struct reiserfs_jh {
int reiserfs_add_tail_list(struct inode *inode, struct buffer_head *bh);
int reiserfs_add_ordered_list(struct inode *inode, struct buffer_head *bh);
int journal_mark_dirty(struct reiserfs_transaction_handle *,
- struct super_block *, struct buffer_head *bh);
+ struct buffer_head *bh);
static inline int reiserfs_file_data_log(struct inode *inode)
{
int journal_release(struct reiserfs_transaction_handle *, struct super_block *);
int journal_release_error(struct reiserfs_transaction_handle *,
struct super_block *);
-int journal_end(struct reiserfs_transaction_handle *, struct super_block *,
- unsigned long);
-int journal_end_sync(struct reiserfs_transaction_handle *, struct super_block *,
- unsigned long);
+int journal_end(struct reiserfs_transaction_handle *);
+int journal_end_sync(struct reiserfs_transaction_handle *);
int journal_mark_freed(struct reiserfs_transaction_handle *,
struct super_block *, b_blocknr_t blocknr);
int journal_transaction_should_end(struct reiserfs_transaction_handle *, int);
int journal_begin(struct reiserfs_transaction_handle *,
struct super_block *sb, unsigned long);
int journal_join_abort(struct reiserfs_transaction_handle *,
- struct super_block *sb, unsigned long);
+ struct super_block *sb);
void reiserfs_abort_journal(struct super_block *sb, int errno);
void reiserfs_abort(struct super_block *sb, int errno, const char *fmt, ...);
int reiserfs_allocate_list_bitmaps(struct super_block *s,
extern void copy_item_head(struct item_head *to,
const struct item_head *from);
-// first key is in cpu form, second - le
+/* first key is in cpu form, second - le */
extern int comp_short_keys(const struct reiserfs_key *le_key,
const struct cpu_key *cpu_key);
extern void le_key2cpu_key(struct cpu_key *to, const struct reiserfs_key *from);
-// both are in le form
+/* both are in le form */
extern int comp_le_keys(const struct reiserfs_key *,
const struct reiserfs_key *);
extern int comp_short_le_keys(const struct reiserfs_key *,
const struct reiserfs_key *);
-//
-// get key version from on disk key - kludge
-//
+/* * get key version from on disk key - kludge */
static inline int le_key_version(const struct reiserfs_key *key)
{
int type;
/* inode.c */
/* args for the create parameter of reiserfs_get_block */
-#define GET_BLOCK_NO_CREATE 0 /* don't create new blocks or convert tails */
-#define GET_BLOCK_CREATE 1 /* add anything you need to find block */
-#define GET_BLOCK_NO_HOLE 2 /* return -ENOENT for file holes */
-#define GET_BLOCK_READ_DIRECT 4 /* read the tail if indirect item not found */
-#define GET_BLOCK_NO_IMUX 8 /* i_mutex is not held, don't preallocate */
-#define GET_BLOCK_NO_DANGLE 16 /* don't leave any transactions running */
+#define GET_BLOCK_NO_CREATE 0 /* don't create new blocks or convert tails */
+#define GET_BLOCK_CREATE 1 /* add anything you need to find block */
+#define GET_BLOCK_NO_HOLE 2 /* return -ENOENT for file holes */
+#define GET_BLOCK_READ_DIRECT 4 /* read the tail if indirect item not found */
+#define GET_BLOCK_NO_IMUX 8 /* i_mutex is not held, don't preallocate */
+#define GET_BLOCK_NO_DANGLE 16 /* don't leave any transactions running */
void reiserfs_read_locked_inode(struct inode *inode,
struct reiserfs_iget_args *args);
extern const struct inode_operations reiserfs_symlink_inode_operations;
extern const struct inode_operations reiserfs_special_inode_operations;
extern const struct file_operations reiserfs_dir_operations;
-int reiserfs_readdir_dentry(struct dentry *, void *, filldir_t, loff_t *);
+int reiserfs_readdir_inode(struct inode *, struct dir_context *);
/* tail_conversion.c */
int direct2indirect(struct reiserfs_transaction_handle *, struct inode *,
void leaf_delete_items(struct buffer_info *cur_bi, int last_first, int first,
int del_num, int del_bytes);
void leaf_insert_into_buf(struct buffer_info *bi, int before,
- struct item_head *inserted_item_ih,
- const char *inserted_item_body, int zeros_number);
-void leaf_paste_in_buffer(struct buffer_info *bi, int pasted_item_num,
- int pos_in_item, int paste_size, const char *body,
+ struct item_head * const inserted_item_ih,
+ const char * const inserted_item_body,
int zeros_number);
+void leaf_paste_in_buffer(struct buffer_info *bi, int pasted_item_num,
+ int pos_in_item, int paste_size,
+ const char * const body, int zeros_number);
void leaf_cut_from_buffer(struct buffer_info *bi, int cut_item_num,
int pos_in_item, int cut_size);
void leaf_paste_entries(struct buffer_info *bi, int item_num, int before,
/* bitmap.c */
-/* structure contains hints for block allocator, and it is a container for
- * arguments, such as node, search path, transaction_handle, etc. */
+/*
+ * structure contains hints for block allocator, and it is a container for
+ * arguments, such as node, search path, transaction_handle, etc.
+ */
struct __reiserfs_blocknr_hint {
- struct inode *inode; /* inode passed to allocator, if we allocate unf. nodes */
+ /* inode passed to allocator, if we allocate unf. nodes */
+ struct inode *inode;
+
sector_t block; /* file offset, in blocks */
struct in_core_key key;
- struct treepath *path; /* search path, used by allocator to deternine search_start by
- * various ways */
- struct reiserfs_transaction_handle *th; /* transaction handle is needed to log super blocks and
- * bitmap blocks changes */
+
+ /*
+ * search path, used by allocator to deternine search_start by
+ * various ways
+ */
+ struct treepath *path;
+
+ /*
+ * transaction handle is needed to log super blocks
+ * and bitmap blocks changes
+ */
+ struct reiserfs_transaction_handle *th;
+
b_blocknr_t beg, end;
- b_blocknr_t search_start; /* a field used to transfer search start value (block number)
- * between different block allocator procedures
- * (determine_search_start() and others) */
- int prealloc_size; /* is set in determine_prealloc_size() function, used by underlayed
- * function that do actual allocation */
-
- unsigned formatted_node:1; /* the allocator uses different polices for getting disk space for
- * formatted/unformatted blocks with/without preallocation */
+
+ /*
+ * a field used to transfer search start value (block number)
+ * between different block allocator procedures
+ * (determine_search_start() and others)
+ */
+ b_blocknr_t search_start;
+
+ /*
+ * is set in determine_prealloc_size() function,
+ * used by underlayed function that do actual allocation
+ */
+ int prealloc_size;
+
+ /*
+ * the allocator uses different polices for getting disk
+ * space for formatted/unformatted blocks with/without preallocation
+ */
+ unsigned formatted_node:1;
unsigned preallocate:1;
};
*/
__le32 reiserfs_choose_packing(struct inode *dir);
+void show_alloc_options(struct seq_file *seq, struct super_block *s);
int reiserfs_init_bitmap_cache(struct super_block *sb);
void reiserfs_free_bitmap_cache(struct super_block *sb);
void reiserfs_cache_bitmap_metadata(struct super_block *sb, struct buffer_head *bh, struct reiserfs_bitmap_info *info);
#define reiserfs_test_le_bit test_bit_le
#define reiserfs_find_next_zero_le_bit find_next_zero_bit_le
-/* sometimes reiserfs_truncate may require to allocate few new blocks
- to perform indirect2direct conversion. People probably used to
- think, that truncate should work without problems on a filesystem
- without free disk space. They may complain that they can not
- truncate due to lack of free disk space. This spare space allows us
- to not worry about it. 500 is probably too much, but it should be
- absolutely safe */
+/*
+ * sometimes reiserfs_truncate may require to allocate few new blocks
+ * to perform indirect2direct conversion. People probably used to
+ * think, that truncate should work without problems on a filesystem
+ * without free disk space. They may complain that they can not
+ * truncate due to lack of free disk space. This spare space allows us
+ * to not worry about it. 500 is probably too much, but it should be
+ * absolutely safe
+ */
#define SPARE_SPACE 500
/* prototypes from ioctl.c */
projects / firefly-linux-kernel-4.4.55.git / blobdiff