This makes it possible for sufile to get the number of clean segments faster.
Signed-off-by: Ryusuke Konishi <[email protected]> --- fs/nilfs2/sufile.c | 53 ++++++++++++++++++++++++++++++++++++++++++--------- 1 files changed, 43 insertions(+), 10 deletions(-) diff --git a/fs/nilfs2/sufile.c b/fs/nilfs2/sufile.c index 8834472..e9b4cec 100644 --- a/fs/nilfs2/sufile.c +++ b/fs/nilfs2/sufile.c @@ -31,6 +31,16 @@ #include "sufile.h" +struct nilfs_sufile_info { + struct nilfs_mdt_info mi; + unsigned long ncleansegs; +}; + +static inline struct nilfs_sufile_info *NILFS_SUI(struct inode *sufile) +{ + return (struct nilfs_sufile_info *)NILFS_MDT(sufile); +} + static inline unsigned long nilfs_sufile_segment_usages_per_block(const struct inode *sufile) { @@ -300,6 +310,7 @@ int nilfs_sufile_alloc(struct inode *sufile, __u64 *segnump) header->sh_last_alloc = cpu_to_le64(segnum); kunmap_atomic(kaddr, KM_USER0); + NILFS_SUI(sufile)->ncleansegs--; nilfs_mdt_mark_buffer_dirty(header_bh); nilfs_mdt_mark_buffer_dirty(su_bh); nilfs_mdt_mark_dirty(sufile); @@ -342,6 +353,8 @@ void nilfs_sufile_do_cancel_free(struct inode *sufile, __u64 segnum, kunmap_atomic(kaddr, KM_USER0); nilfs_sufile_mod_counter(header_bh, -1, 1); + NILFS_SUI(sufile)->ncleansegs--; + nilfs_mdt_mark_buffer_dirty(su_bh); nilfs_mdt_mark_dirty(sufile); } @@ -371,6 +384,8 @@ void nilfs_sufile_do_scrap(struct inode *sufile, __u64 segnum, kunmap_atomic(kaddr, KM_USER0); nilfs_sufile_mod_counter(header_bh, clean ? (u64)-1 : 0, dirty ? 0 : 1); + NILFS_SUI(sufile)->ncleansegs -= clean; + nilfs_mdt_mark_buffer_dirty(su_bh); nilfs_mdt_mark_dirty(sufile); } @@ -400,6 +415,8 @@ void nilfs_sufile_do_free(struct inode *sufile, __u64 segnum, nilfs_mdt_mark_buffer_dirty(su_bh); nilfs_sufile_mod_counter(header_bh, 1, sudirty ? (u64)-1 : 0); + NILFS_SUI(sufile)->ncleansegs++; + nilfs_mdt_mark_dirty(sufile); } @@ -541,13 +558,8 @@ int nilfs_sufile_get_stat(struct inode *sufile, struct nilfs_sustat *sustat) */ int nilfs_sufile_get_ncleansegs(struct inode *sufile, unsigned long *nsegsp) { - struct nilfs_sustat sustat; - int ret; - - ret = nilfs_sufile_get_stat(sufile, &sustat); - if (ret == 0) - *nsegsp = sustat.ss_ncleansegs; - return ret; + *nsegsp = NILFS_SUI(sufile)->ncleansegs; + return 0; } void nilfs_sufile_do_set_error(struct inode *sufile, __u64 segnum, @@ -568,8 +580,10 @@ void nilfs_sufile_do_set_error(struct inode *sufile, __u64 segnum, nilfs_segment_usage_set_error(su); kunmap_atomic(kaddr, KM_USER0); - if (suclean) + if (suclean) { nilfs_sufile_mod_counter(header_bh, -1, 0); + NILFS_SUI(sufile)->ncleansegs--; + } nilfs_mdt_mark_buffer_dirty(su_bh); nilfs_mdt_mark_dirty(sufile); } @@ -656,7 +670,25 @@ ssize_t nilfs_sufile_get_suinfo(struct inode *sufile, __u64 segnum, void *buf, */ int nilfs_sufile_read(struct inode *sufile, struct nilfs_inode *raw_inode) { - return nilfs_read_inode_common(sufile, raw_inode); + struct nilfs_sufile_info *sui = NILFS_SUI(sufile); + struct buffer_head *header_bh; + struct nilfs_sufile_header *header; + void *kaddr; + int ret; + + ret = nilfs_read_inode_common(sufile, raw_inode); + if (ret < 0) + return ret; + + ret = nilfs_sufile_get_header_block(sufile, &header_bh); + if (!ret) { + kaddr = kmap_atomic(header_bh->b_page, KM_USER0); + header = kaddr + bh_offset(header_bh); + sui->ncleansegs = le64_to_cpu(header->sh_ncleansegs); + kunmap_atomic(kaddr, KM_USER0); + brelse(header_bh); + } + return ret; } /** @@ -668,7 +700,8 @@ struct inode *nilfs_sufile_new(struct the_nilfs *nilfs, size_t susize) { struct inode *sufile; - sufile = nilfs_mdt_new(nilfs, NULL, NILFS_SUFILE_INO, 0); + sufile = nilfs_mdt_new(nilfs, NULL, NILFS_SUFILE_INO, + sizeof(struct nilfs_sufile_info)); if (sufile) nilfs_mdt_set_entry_size(sufile, susize, sizeof(struct nilfs_sufile_header)); -- 1.6.3.4 _______________________________________________ users mailing list [email protected] https://www.nilfs.org/mailman/listinfo/users
