diff options
Diffstat (limited to 'fs/nilfs2/the_nilfs.h')
| -rw-r--r-- | fs/nilfs2/the_nilfs.h | 68 |
1 files changed, 54 insertions, 14 deletions
diff --git a/fs/nilfs2/the_nilfs.h b/fs/nilfs2/the_nilfs.h index 69226e14b74..de8cc53b4a5 100644 --- a/fs/nilfs2/the_nilfs.h +++ b/fs/nilfs2/the_nilfs.h @@ -31,13 +31,12 @@ #include <linux/blkdev.h> #include <linux/backing-dev.h> #include <linux/slab.h> -#include "sb.h" + +struct nilfs_sc_info; /* the_nilfs struct */ enum { THE_NILFS_INIT = 0, /* Information from super_block is set */ - THE_NILFS_LOADED, /* Roll-back/roll-forward has done and - the latest checkpoint was loaded */ THE_NILFS_DISCONTINUED, /* 'next' pointer chain has broken */ THE_NILFS_GC_RUNNING, /* gc process is running */ THE_NILFS_SB_DIRTY, /* super block is dirty */ @@ -48,11 +47,13 @@ enum { * @ns_flags: flags * @ns_bdev: block device * @ns_sem: semaphore for shared states + * @ns_snapshot_mount_mutex: mutex to protect snapshot mounts * @ns_sbh: buffer heads of on-disk super blocks * @ns_sbp: pointers to super block data * @ns_sbwtime: previous write time of super block * @ns_sbwcount: write count of super block * @ns_sbsize: size of valid data in super block + * @ns_mount_state: file system state * @ns_seg_seq: segment sequence counter * @ns_segnum: index number of the latest full segment. * @ns_nextnum: index number of the full segment index to be used next @@ -67,13 +68,23 @@ enum { * @ns_last_cno: checkpoint number of the latest segment * @ns_prot_seq: least sequence number of segments which must not be reclaimed * @ns_prev_seq: base sequence number used to decide if advance log cursor - * @ns_segctor_sem: segment constructor semaphore + * @ns_writer: log writer + * @ns_segctor_sem: semaphore protecting log write * @ns_dat: DAT file inode * @ns_cpfile: checkpoint file inode * @ns_sufile: segusage file inode * @ns_cptree: rb-tree of all mounted checkpoints (nilfs_root) * @ns_cptree_lock: lock protecting @ns_cptree + * @ns_dirty_files: list of dirty files + * @ns_inode_lock: lock protecting @ns_dirty_files * @ns_gc_inodes: dummy inodes to keep live blocks + * @ns_next_generation: next generation number for inodes + * @ns_next_gen_lock: lock protecting @ns_next_generation + * @ns_mount_opt: mount options + * @ns_resuid: uid for reserved blocks + * @ns_resgid: gid for reserved blocks + * @ns_interval: checkpoint creation interval + * @ns_watermark: watermark for the number of dirty buffers * @ns_blocksize_bits: bit length of block size * @ns_blocksize: block size * @ns_nsegments: number of segments in filesystem @@ -90,13 +101,12 @@ struct the_nilfs { struct block_device *ns_bdev; struct rw_semaphore ns_sem; + struct mutex ns_snapshot_mount_mutex; /* * used for * - loading the latest checkpoint exclusively. * - allocating a new full segment. - * - protecting s_dirt in the super_block struct - * (see nilfs_write_super) and the following fields. */ struct buffer_head *ns_sbh[2]; struct nilfs_super_block *ns_sbp[2]; @@ -133,6 +143,7 @@ struct the_nilfs { u64 ns_prot_seq; u64 ns_prev_seq; + struct nilfs_sc_info *ns_writer; struct rw_semaphore ns_segctor_sem; /* @@ -147,9 +158,25 @@ struct the_nilfs { struct rb_root ns_cptree; spinlock_t ns_cptree_lock; + /* Dirty inode list */ + struct list_head ns_dirty_files; + spinlock_t ns_inode_lock; + /* GC inode list */ struct list_head ns_gc_inodes; + /* Inode allocator */ + u32 ns_next_generation; + spinlock_t ns_next_gen_lock; + + /* Mount options */ + unsigned long ns_mount_opt; + + uid_t ns_resuid; + gid_t ns_resgid; + unsigned long ns_interval; + unsigned long ns_watermark; + /* Disk layout information (static) */ unsigned int ns_blocksize_bits; unsigned int ns_blocksize; @@ -178,11 +205,24 @@ static inline int nilfs_##name(struct the_nilfs *nilfs) \ } THE_NILFS_FNS(INIT, init) -THE_NILFS_FNS(LOADED, loaded) THE_NILFS_FNS(DISCONTINUED, discontinued) THE_NILFS_FNS(GC_RUNNING, gc_running) THE_NILFS_FNS(SB_DIRTY, sb_dirty) +/* + * Mount option operations + */ +#define nilfs_clear_opt(nilfs, opt) \ + do { (nilfs)->ns_mount_opt &= ~NILFS_MOUNT_##opt; } while (0) +#define nilfs_set_opt(nilfs, opt) \ + do { (nilfs)->ns_mount_opt |= NILFS_MOUNT_##opt; } while (0) +#define nilfs_test_opt(nilfs, opt) ((nilfs)->ns_mount_opt & NILFS_MOUNT_##opt) +#define nilfs_write_opt(nilfs, mask, opt) \ + do { (nilfs)->ns_mount_opt = \ + (((nilfs)->ns_mount_opt & ~NILFS_MOUNT_##mask) | \ + NILFS_MOUNT_##opt); \ + } while (0) + /** * struct nilfs_root - nilfs root object * @cno: checkpoint number @@ -190,9 +230,8 @@ THE_NILFS_FNS(SB_DIRTY, sb_dirty) * @count: refcount of this structure * @nilfs: nilfs object * @ifile: inode file - * @root: root inode * @inodes_count: number of inodes - * @blocks_count: number of blocks (Reserved) + * @blocks_count: number of blocks */ struct nilfs_root { __u64 cno; @@ -202,8 +241,8 @@ struct nilfs_root { struct the_nilfs *nilfs; struct inode *ifile; - atomic_t inodes_count; - atomic_t blocks_count; + atomic64_t inodes_count; + atomic64_t blocks_count; }; /* Special checkpoint number */ @@ -227,15 +266,16 @@ static inline int nilfs_sb_will_flip(struct the_nilfs *nilfs) void nilfs_set_last_segment(struct the_nilfs *, sector_t, u64, __u64); struct the_nilfs *alloc_nilfs(struct block_device *bdev); void destroy_nilfs(struct the_nilfs *nilfs); -int init_nilfs(struct the_nilfs *, struct nilfs_sb_info *, char *); -int load_nilfs(struct the_nilfs *, struct nilfs_sb_info *); +int init_nilfs(struct the_nilfs *nilfs, struct super_block *sb, char *data); +int load_nilfs(struct the_nilfs *nilfs, struct super_block *sb); +unsigned long nilfs_nrsvsegs(struct the_nilfs *nilfs, unsigned long nsegs); +void nilfs_set_nsegments(struct the_nilfs *nilfs, unsigned long nsegs); int nilfs_discard_segments(struct the_nilfs *, __u64 *, size_t); int nilfs_count_free_blocks(struct the_nilfs *, sector_t *); struct nilfs_root *nilfs_lookup_root(struct the_nilfs *nilfs, __u64 cno); struct nilfs_root *nilfs_find_or_create_root(struct the_nilfs *nilfs, __u64 cno); void nilfs_put_root(struct nilfs_root *root); -struct nilfs_sb_info *nilfs_find_sbinfo(struct the_nilfs *, int, __u64); int nilfs_near_disk_full(struct the_nilfs *); void nilfs_fall_back_super_block(struct the_nilfs *); void nilfs_swap_super_block(struct the_nilfs *); |