Lines Matching defs:segbuf
17 #include "segbuf.h"
30 static int nilfs_segbuf_write(struct nilfs_segment_buffer *segbuf,
32 static int nilfs_segbuf_wait(struct nilfs_segment_buffer *segbuf);
36 struct nilfs_segment_buffer *segbuf;
38 segbuf = kmem_cache_alloc(nilfs_segbuf_cachep, GFP_NOFS);
39 if (unlikely(!segbuf))
42 segbuf->sb_super = sb;
43 INIT_LIST_HEAD(&segbuf->sb_list);
44 INIT_LIST_HEAD(&segbuf->sb_segsum_buffers);
45 INIT_LIST_HEAD(&segbuf->sb_payload_buffers);
46 segbuf->sb_super_root = NULL;
48 init_completion(&segbuf->sb_bio_event);
49 atomic_set(&segbuf->sb_err, 0);
50 segbuf->sb_nbio = 0;
52 return segbuf;
55 void nilfs_segbuf_free(struct nilfs_segment_buffer *segbuf)
57 kmem_cache_free(nilfs_segbuf_cachep, segbuf);
60 void nilfs_segbuf_map(struct nilfs_segment_buffer *segbuf, __u64 segnum,
63 segbuf->sb_segnum = segnum;
64 nilfs_get_segment_range(nilfs, segnum, &segbuf->sb_fseg_start,
65 &segbuf->sb_fseg_end);
67 segbuf->sb_pseg_start = segbuf->sb_fseg_start + offset;
68 segbuf->sb_rest_blocks =
69 segbuf->sb_fseg_end - segbuf->sb_pseg_start + 1;
74 * @segbuf: new segment buffer
77 void nilfs_segbuf_map_cont(struct nilfs_segment_buffer *segbuf,
80 segbuf->sb_segnum = prev->sb_segnum;
81 segbuf->sb_fseg_start = prev->sb_fseg_start;
82 segbuf->sb_fseg_end = prev->sb_fseg_end;
83 segbuf->sb_pseg_start = prev->sb_pseg_start + prev->sb_sum.nblocks;
84 segbuf->sb_rest_blocks =
85 segbuf->sb_fseg_end - segbuf->sb_pseg_start + 1;
88 void nilfs_segbuf_set_next_segnum(struct nilfs_segment_buffer *segbuf,
91 segbuf->sb_nextnum = nextnum;
92 segbuf->sb_sum.next = nilfs_get_segment_start_blocknr(nilfs, nextnum);
95 int nilfs_segbuf_extend_segsum(struct nilfs_segment_buffer *segbuf)
99 bh = sb_getblk(segbuf->sb_super,
100 segbuf->sb_pseg_start + segbuf->sb_sum.nsumblk);
110 nilfs_segbuf_add_segsum_buffer(segbuf, bh);
114 int nilfs_segbuf_extend_payload(struct nilfs_segment_buffer *segbuf,
119 bh = sb_getblk(segbuf->sb_super,
120 segbuf->sb_pseg_start + segbuf->sb_sum.nblocks);
124 nilfs_segbuf_add_payload_buffer(segbuf, bh);
129 int nilfs_segbuf_reset(struct nilfs_segment_buffer *segbuf, unsigned int flags,
134 segbuf->sb_sum.nblocks = segbuf->sb_sum.nsumblk = 0;
135 err = nilfs_segbuf_extend_segsum(segbuf);
139 segbuf->sb_sum.flags = flags;
140 segbuf->sb_sum.sumbytes = sizeof(struct nilfs_segment_summary);
141 segbuf->sb_sum.nfinfo = segbuf->sb_sum.nfileblk = 0;
142 segbuf->sb_sum.ctime = ctime;
143 segbuf->sb_sum.cno = cno;
150 void nilfs_segbuf_fill_in_segsum(struct nilfs_segment_buffer *segbuf)
155 bh_sum = list_entry(segbuf->sb_segsum_buffers.next,
161 raw_sum->ss_flags = cpu_to_le16(segbuf->sb_sum.flags);
162 raw_sum->ss_seq = cpu_to_le64(segbuf->sb_sum.seg_seq);
163 raw_sum->ss_create = cpu_to_le64(segbuf->sb_sum.ctime);
164 raw_sum->ss_next = cpu_to_le64(segbuf->sb_sum.next);
165 raw_sum->ss_nblocks = cpu_to_le32(segbuf->sb_sum.nblocks);
166 raw_sum->ss_nfinfo = cpu_to_le32(segbuf->sb_sum.nfinfo);
167 raw_sum->ss_sumbytes = cpu_to_le32(segbuf->sb_sum.sumbytes);
169 raw_sum->ss_cno = cpu_to_le64(segbuf->sb_sum.cno);
176 nilfs_segbuf_fill_in_segsum_crc(struct nilfs_segment_buffer *segbuf, u32 seed)
180 unsigned long size, bytes = segbuf->sb_sum.sumbytes;
183 bh = list_entry(segbuf->sb_segsum_buffers.next, struct buffer_head,
194 list_for_each_entry_continue(bh, &segbuf->sb_segsum_buffers,
203 static void nilfs_segbuf_fill_in_data_crc(struct nilfs_segment_buffer *segbuf,
210 bh = list_entry(segbuf->sb_segsum_buffers.next, struct buffer_head,
217 list_for_each_entry_continue(bh, &segbuf->sb_segsum_buffers,
221 list_for_each_entry(bh, &segbuf->sb_payload_buffers, b_assoc_buffers) {
234 nilfs_segbuf_fill_in_super_root_crc(struct nilfs_segment_buffer *segbuf,
238 struct the_nilfs *nilfs = segbuf->sb_super->s_fs_info;
242 raw_sr = (struct nilfs_super_root *)segbuf->sb_super_root->b_data;
260 static void nilfs_segbuf_clear(struct nilfs_segment_buffer *segbuf)
262 nilfs_release_buffers(&segbuf->sb_segsum_buffers);
263 nilfs_release_buffers(&segbuf->sb_payload_buffers);
264 segbuf->sb_super_root = NULL;
272 struct nilfs_segment_buffer *segbuf;
274 list_for_each_entry(segbuf, logs, sb_list)
275 nilfs_segbuf_clear(segbuf);
281 struct nilfs_segment_buffer *n, *segbuf;
283 segbuf = list_prepare_entry(last, logs, sb_list);
284 list_for_each_entry_safe_continue(segbuf, n, logs, sb_list) {
285 list_del_init(&segbuf->sb_list);
286 nilfs_segbuf_clear(segbuf);
287 nilfs_segbuf_free(segbuf);
293 struct nilfs_segment_buffer *segbuf;
296 list_for_each_entry(segbuf, logs, sb_list) {
297 ret = nilfs_segbuf_write(segbuf, nilfs);
306 struct nilfs_segment_buffer *segbuf;
309 list_for_each_entry(segbuf, logs, sb_list) {
310 err = nilfs_segbuf_wait(segbuf);
324 struct nilfs_segment_buffer *segbuf;
326 list_for_each_entry(segbuf, logs, sb_list) {
327 if (segbuf->sb_super_root)
328 nilfs_segbuf_fill_in_super_root_crc(segbuf, seed);
329 nilfs_segbuf_fill_in_segsum_crc(segbuf, seed);
330 nilfs_segbuf_fill_in_data_crc(segbuf, seed);
339 struct nilfs_segment_buffer *segbuf = bio->bi_private;
342 atomic_inc(&segbuf->sb_err);
345 complete(&segbuf->sb_bio_event);
348 static int nilfs_segbuf_submit_bio(struct nilfs_segment_buffer *segbuf,
354 bio->bi_private = segbuf;
356 segbuf->sb_nbio++;
365 static void nilfs_segbuf_prepare_write(struct nilfs_segment_buffer *segbuf,
369 wi->rest_blocks = segbuf->sb_sum.nblocks;
373 wi->blocknr = segbuf->sb_pseg_start;
376 static int nilfs_segbuf_submit_bh(struct nilfs_segment_buffer *segbuf,
397 err = nilfs_segbuf_submit_bio(segbuf, wi);
406 * @segbuf: buffer storing a log to be written
411 static int nilfs_segbuf_write(struct nilfs_segment_buffer *segbuf,
419 nilfs_segbuf_prepare_write(segbuf, &wi);
421 list_for_each_entry(bh, &segbuf->sb_segsum_buffers, b_assoc_buffers) {
422 res = nilfs_segbuf_submit_bh(segbuf, &wi, bh);
427 list_for_each_entry(bh, &segbuf->sb_payload_buffers, b_assoc_buffers) {
428 res = nilfs_segbuf_submit_bh(segbuf, &wi, bh);
439 res = nilfs_segbuf_submit_bio(segbuf, &wi);
448 * @segbuf: segment buffer
452 static int nilfs_segbuf_wait(struct nilfs_segment_buffer *segbuf)
456 if (!segbuf->sb_nbio)
460 wait_for_completion(&segbuf->sb_bio_event);
461 } while (--segbuf->sb_nbio > 0);
463 if (unlikely(atomic_read(&segbuf->sb_err) > 0)) {
464 nilfs_err(segbuf->sb_super,
466 (unsigned long long)segbuf->sb_pseg_start,
467 segbuf->sb_sum.nblocks,
468 (unsigned long long)segbuf->sb_segnum);