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fs/nilfs2/segment.c
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/* * segment.c - NILFS segment constructor. * * Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA * * Written by Ryusuke Konishi <ryusuke@osrg.net> * */ #include <linux/pagemap.h> #include <linux/buffer_head.h> #include <linux/writeback.h> #include <linux/bio.h> #include <linux/completion.h> #include <linux/blkdev.h> #include <linux/backing-dev.h> #include <linux/freezer.h> #include <linux/kthread.h> #include <linux/crc32.h> #include <linux/pagevec.h> |
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#include <linux/slab.h> |
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#include "nilfs.h" #include "btnode.h" #include "page.h" #include "segment.h" #include "sufile.h" #include "cpfile.h" #include "ifile.h" |
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#include "segbuf.h" /* * Segment constructor */ #define SC_N_INODEVEC 16 /* Size of locally allocated inode vector */ #define SC_MAX_SEGDELTA 64 /* Upper limit of the number of segments appended in collection retry loop */ /* Construction mode */ enum { SC_LSEG_SR = 1, /* Make a logical segment having a super root */ SC_LSEG_DSYNC, /* Flush data blocks of a given file and make a logical segment without a super root */ SC_FLUSH_FILE, /* Flush data files, leads to segment writes without creating a checkpoint */ SC_FLUSH_DAT, /* Flush DAT file. This also creates segments without a checkpoint */ }; /* Stage numbers of dirty block collection */ enum { NILFS_ST_INIT = 0, NILFS_ST_GC, /* Collecting dirty blocks for GC */ NILFS_ST_FILE, |
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NILFS_ST_IFILE, NILFS_ST_CPFILE, NILFS_ST_SUFILE, NILFS_ST_DAT, NILFS_ST_SR, /* Super root */ NILFS_ST_DSYNC, /* Data sync blocks */ NILFS_ST_DONE, }; /* State flags of collection */ #define NILFS_CF_NODE 0x0001 /* Collecting node blocks */ #define NILFS_CF_IFILE_STARTED 0x0002 /* IFILE stage has started */ |
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#define NILFS_CF_SUFREED 0x0004 /* segment usages has been freed */ #define NILFS_CF_HISTORY_MASK (NILFS_CF_IFILE_STARTED | NILFS_CF_SUFREED) |
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/* Operations depending on the construction mode and file type */ struct nilfs_sc_operations { int (*collect_data)(struct nilfs_sc_info *, struct buffer_head *, struct inode *); int (*collect_node)(struct nilfs_sc_info *, struct buffer_head *, struct inode *); int (*collect_bmap)(struct nilfs_sc_info *, struct buffer_head *, struct inode *); void (*write_data_binfo)(struct nilfs_sc_info *, struct nilfs_segsum_pointer *, union nilfs_binfo *); void (*write_node_binfo)(struct nilfs_sc_info *, struct nilfs_segsum_pointer *, union nilfs_binfo *); }; /* * Other definitions */ static void nilfs_segctor_start_timer(struct nilfs_sc_info *); static void nilfs_segctor_do_flush(struct nilfs_sc_info *, int); static void nilfs_segctor_do_immediate_flush(struct nilfs_sc_info *); |
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static void nilfs_dispose_list(struct the_nilfs *, struct list_head *, int); |
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#define nilfs_cnt32_gt(a, b) \ (typecheck(__u32, a) && typecheck(__u32, b) && \ ((__s32)(b) - (__s32)(a) < 0)) #define nilfs_cnt32_ge(a, b) \ (typecheck(__u32, a) && typecheck(__u32, b) && \ ((__s32)(a) - (__s32)(b) >= 0)) #define nilfs_cnt32_lt(a, b) nilfs_cnt32_gt(b, a) #define nilfs_cnt32_le(a, b) nilfs_cnt32_ge(b, a) |
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static int nilfs_prepare_segment_lock(struct nilfs_transaction_info *ti) { struct nilfs_transaction_info *cur_ti = current->journal_info; void *save = NULL; if (cur_ti) { if (cur_ti->ti_magic == NILFS_TI_MAGIC) return ++cur_ti->ti_count; else { /* * If journal_info field is occupied by other FS, |
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* it is saved and will be restored on * nilfs_transaction_commit(). |
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*/ printk(KERN_WARNING "NILFS warning: journal info from a different " "FS "); save = current->journal_info; } } if (!ti) { ti = kmem_cache_alloc(nilfs_transaction_cachep, GFP_NOFS); if (!ti) return -ENOMEM; ti->ti_flags = NILFS_TI_DYNAMIC_ALLOC; } else { ti->ti_flags = 0; } ti->ti_count = 0; ti->ti_save = save; ti->ti_magic = NILFS_TI_MAGIC; current->journal_info = ti; return 0; } /** * nilfs_transaction_begin - start indivisible file operations. * @sb: super block * @ti: nilfs_transaction_info * @vacancy_check: flags for vacancy rate checks * * nilfs_transaction_begin() acquires a reader/writer semaphore, called * the segment semaphore, to make a segment construction and write tasks |
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* exclusive. The function is used with nilfs_transaction_commit() in pairs. |
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* The region enclosed by these two functions can be nested. To avoid a * deadlock, the semaphore is only acquired or released in the outermost call. * * This function allocates a nilfs_transaction_info struct to keep context * information on it. It is initialized and hooked onto the current task in * the outermost call. If a pre-allocated struct is given to @ti, it is used |
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* instead; otherwise a new struct is assigned from a slab. |
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* * When @vacancy_check flag is set, this function will check the amount of * free space, and will wait for the GC to reclaim disk space if low capacity. * * Return Value: On success, 0 is returned. On error, one of the following * negative error code is returned. * * %-ENOMEM - Insufficient memory available. * |
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* %-ENOSPC - No space left on device */ int nilfs_transaction_begin(struct super_block *sb, struct nilfs_transaction_info *ti, int vacancy_check) { |
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struct the_nilfs *nilfs; int ret = nilfs_prepare_segment_lock(ti); if (unlikely(ret < 0)) return ret; if (ret > 0) return 0; |
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vfs_check_frozen(sb, SB_FREEZE_WRITE); |
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nilfs = sb->s_fs_info; |
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down_read(&nilfs->ns_segctor_sem); if (vacancy_check && nilfs_near_disk_full(nilfs)) { up_read(&nilfs->ns_segctor_sem); ret = -ENOSPC; goto failed; } return 0; failed: ti = current->journal_info; current->journal_info = ti->ti_save; if (ti->ti_flags & NILFS_TI_DYNAMIC_ALLOC) kmem_cache_free(nilfs_transaction_cachep, ti); return ret; } /** |
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* nilfs_transaction_commit - commit indivisible file operations. |
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* @sb: super block |
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* |
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* nilfs_transaction_commit() releases the read semaphore which is * acquired by nilfs_transaction_begin(). This is only performed * in outermost call of this function. If a commit flag is set, * nilfs_transaction_commit() sets a timer to start the segment * constructor. If a sync flag is set, it starts construction * directly. |
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*/ |
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int nilfs_transaction_commit(struct super_block *sb) |
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{ struct nilfs_transaction_info *ti = current->journal_info; |
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struct the_nilfs *nilfs = sb->s_fs_info; |
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int err = 0; BUG_ON(ti == NULL || ti->ti_magic != NILFS_TI_MAGIC); |
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ti->ti_flags |= NILFS_TI_COMMIT; |
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if (ti->ti_count > 0) { ti->ti_count--; return 0; } |
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if (nilfs->ns_writer) { struct nilfs_sc_info *sci = nilfs->ns_writer; |
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if (ti->ti_flags & NILFS_TI_COMMIT) nilfs_segctor_start_timer(sci); |
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if (atomic_read(&nilfs->ns_ndirtyblks) > sci->sc_watermark) |
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nilfs_segctor_do_flush(sci, 0); } |
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up_read(&nilfs->ns_segctor_sem); |
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current->journal_info = ti->ti_save; if (ti->ti_flags & NILFS_TI_SYNC) err = nilfs_construct_segment(sb); if (ti->ti_flags & NILFS_TI_DYNAMIC_ALLOC) kmem_cache_free(nilfs_transaction_cachep, ti); return err; } |
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void nilfs_transaction_abort(struct super_block *sb) { struct nilfs_transaction_info *ti = current->journal_info; |
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struct the_nilfs *nilfs = sb->s_fs_info; |
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BUG_ON(ti == NULL || ti->ti_magic != NILFS_TI_MAGIC); if (ti->ti_count > 0) { ti->ti_count--; return; } |
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up_read(&nilfs->ns_segctor_sem); |
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current->journal_info = ti->ti_save; if (ti->ti_flags & NILFS_TI_DYNAMIC_ALLOC) kmem_cache_free(nilfs_transaction_cachep, ti); } |
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void nilfs_relax_pressure_in_lock(struct super_block *sb) { |
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struct the_nilfs *nilfs = sb->s_fs_info; |
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struct nilfs_sc_info *sci = nilfs->ns_writer; |
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if (!sci || !sci->sc_flush_request) return; set_bit(NILFS_SC_PRIOR_FLUSH, &sci->sc_flags); up_read(&nilfs->ns_segctor_sem); down_write(&nilfs->ns_segctor_sem); if (sci->sc_flush_request && test_bit(NILFS_SC_PRIOR_FLUSH, &sci->sc_flags)) { struct nilfs_transaction_info *ti = current->journal_info; ti->ti_flags |= NILFS_TI_WRITER; nilfs_segctor_do_immediate_flush(sci); ti->ti_flags &= ~NILFS_TI_WRITER; } downgrade_write(&nilfs->ns_segctor_sem); } |
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static void nilfs_transaction_lock(struct super_block *sb, |
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struct nilfs_transaction_info *ti, int gcflag) { struct nilfs_transaction_info *cur_ti = current->journal_info; |
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struct the_nilfs *nilfs = sb->s_fs_info; |
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struct nilfs_sc_info *sci = nilfs->ns_writer; |
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|
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WARN_ON(cur_ti); |
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ti->ti_flags = NILFS_TI_WRITER; ti->ti_count = 0; ti->ti_save = cur_ti; ti->ti_magic = NILFS_TI_MAGIC; INIT_LIST_HEAD(&ti->ti_garbage); current->journal_info = ti; for (;;) { |
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down_write(&nilfs->ns_segctor_sem); if (!test_bit(NILFS_SC_PRIOR_FLUSH, &sci->sc_flags)) |
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break; |
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nilfs_segctor_do_immediate_flush(sci); |
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|
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up_write(&nilfs->ns_segctor_sem); |
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yield(); } if (gcflag) ti->ti_flags |= NILFS_TI_GC; } |
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static void nilfs_transaction_unlock(struct super_block *sb) |
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{ struct nilfs_transaction_info *ti = current->journal_info; |
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struct the_nilfs *nilfs = sb->s_fs_info; |
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BUG_ON(ti == NULL || ti->ti_magic != NILFS_TI_MAGIC); BUG_ON(ti->ti_count > 0); |
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up_write(&nilfs->ns_segctor_sem); |
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current->journal_info = ti->ti_save; if (!list_empty(&ti->ti_garbage)) |
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nilfs_dispose_list(nilfs, &ti->ti_garbage, 0); |
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} static void *nilfs_segctor_map_segsum_entry(struct nilfs_sc_info *sci, struct nilfs_segsum_pointer *ssp, unsigned bytes) { struct nilfs_segment_buffer *segbuf = sci->sc_curseg; unsigned blocksize = sci->sc_super->s_blocksize; void *p; if (unlikely(ssp->offset + bytes > blocksize)) { ssp->offset = 0; BUG_ON(NILFS_SEGBUF_BH_IS_LAST(ssp->bh, &segbuf->sb_segsum_buffers)); ssp->bh = NILFS_SEGBUF_NEXT_BH(ssp->bh); } p = ssp->bh->b_data + ssp->offset; ssp->offset += bytes; return p; } /** * nilfs_segctor_reset_segment_buffer - reset the current segment buffer * @sci: nilfs_sc_info */ static int nilfs_segctor_reset_segment_buffer(struct nilfs_sc_info *sci) { struct nilfs_segment_buffer *segbuf = sci->sc_curseg; struct buffer_head *sumbh; unsigned sumbytes; unsigned flags = 0; int err; if (nilfs_doing_gc()) flags = NILFS_SS_GC; |
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err = nilfs_segbuf_reset(segbuf, flags, sci->sc_seg_ctime, sci->sc_cno); |
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if (unlikely(err)) return err; sumbh = NILFS_SEGBUF_FIRST_BH(&segbuf->sb_segsum_buffers); sumbytes = segbuf->sb_sum.sumbytes; sci->sc_finfo_ptr.bh = sumbh; sci->sc_finfo_ptr.offset = sumbytes; sci->sc_binfo_ptr.bh = sumbh; sci->sc_binfo_ptr.offset = sumbytes; sci->sc_blk_cnt = sci->sc_datablk_cnt = 0; return 0; } static int nilfs_segctor_feed_segment(struct nilfs_sc_info *sci) { sci->sc_nblk_this_inc += sci->sc_curseg->sb_sum.nblocks; if (NILFS_SEGBUF_IS_LAST(sci->sc_curseg, &sci->sc_segbufs)) return -E2BIG; /* The current segment is filled up (internal code) */ sci->sc_curseg = NILFS_NEXT_SEGBUF(sci->sc_curseg); return nilfs_segctor_reset_segment_buffer(sci); } static int nilfs_segctor_add_super_root(struct nilfs_sc_info *sci) { struct nilfs_segment_buffer *segbuf = sci->sc_curseg; int err; if (segbuf->sb_sum.nblocks >= segbuf->sb_rest_blocks) { err = nilfs_segctor_feed_segment(sci); if (err) return err; segbuf = sci->sc_curseg; } |
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err = nilfs_segbuf_extend_payload(segbuf, &segbuf->sb_super_root); |
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if (likely(!err)) segbuf->sb_sum.flags |= NILFS_SS_SR; return err; } /* * Functions for making segment summary and payloads */ static int nilfs_segctor_segsum_block_required( struct nilfs_sc_info *sci, const struct nilfs_segsum_pointer *ssp, unsigned binfo_size) { unsigned blocksize = sci->sc_super->s_blocksize; /* Size of finfo and binfo is enough small against blocksize */ return ssp->offset + binfo_size + (!sci->sc_blk_cnt ? sizeof(struct nilfs_finfo) : 0) > blocksize; } static void nilfs_segctor_begin_finfo(struct nilfs_sc_info *sci, struct inode *inode) { sci->sc_curseg->sb_sum.nfinfo++; sci->sc_binfo_ptr = sci->sc_finfo_ptr; nilfs_segctor_map_segsum_entry( sci, &sci->sc_binfo_ptr, sizeof(struct nilfs_finfo)); |
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if (NILFS_I(inode)->i_root && !test_bit(NILFS_SC_HAVE_DELTA, &sci->sc_flags)) |
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set_bit(NILFS_SC_HAVE_DELTA, &sci->sc_flags); |
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/* skip finfo */ } static void nilfs_segctor_end_finfo(struct nilfs_sc_info *sci, struct inode *inode) { struct nilfs_finfo *finfo; struct nilfs_inode_info *ii; struct nilfs_segment_buffer *segbuf; |
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__u64 cno; |
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if (sci->sc_blk_cnt == 0) return; ii = NILFS_I(inode); |
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if (test_bit(NILFS_I_GCINODE, &ii->i_state)) cno = ii->i_cno; else if (NILFS_ROOT_METADATA_FILE(inode->i_ino)) cno = 0; else cno = sci->sc_cno; |
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finfo = nilfs_segctor_map_segsum_entry(sci, &sci->sc_finfo_ptr, sizeof(*finfo)); finfo->fi_ino = cpu_to_le64(inode->i_ino); finfo->fi_nblocks = cpu_to_le32(sci->sc_blk_cnt); finfo->fi_ndatablk = cpu_to_le32(sci->sc_datablk_cnt); |
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finfo->fi_cno = cpu_to_le64(cno); |
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segbuf = sci->sc_curseg; segbuf->sb_sum.sumbytes = sci->sc_binfo_ptr.offset + sci->sc_super->s_blocksize * (segbuf->sb_sum.nsumblk - 1); sci->sc_finfo_ptr = sci->sc_binfo_ptr; sci->sc_blk_cnt = sci->sc_datablk_cnt = 0; } static int nilfs_segctor_add_file_block(struct nilfs_sc_info *sci, struct buffer_head *bh, struct inode *inode, unsigned binfo_size) { struct nilfs_segment_buffer *segbuf; int required, err = 0; retry: segbuf = sci->sc_curseg; required = nilfs_segctor_segsum_block_required( sci, &sci->sc_binfo_ptr, binfo_size); if (segbuf->sb_sum.nblocks + required + 1 > segbuf->sb_rest_blocks) { nilfs_segctor_end_finfo(sci, inode); err = nilfs_segctor_feed_segment(sci); if (err) return err; goto retry; } if (unlikely(required)) { err = nilfs_segbuf_extend_segsum(segbuf); if (unlikely(err)) goto failed; } if (sci->sc_blk_cnt == 0) nilfs_segctor_begin_finfo(sci, inode); nilfs_segctor_map_segsum_entry(sci, &sci->sc_binfo_ptr, binfo_size); /* Substitution to vblocknr is delayed until update_blocknr() */ nilfs_segbuf_add_file_buffer(segbuf, bh); sci->sc_blk_cnt++; failed: return err; } |
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/* * Callback functions that enumerate, mark, and collect dirty blocks */ static int nilfs_collect_file_data(struct nilfs_sc_info *sci, struct buffer_head *bh, struct inode *inode) { int err; |
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err = nilfs_bmap_propagate(NILFS_I(inode)->i_bmap, bh); |
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if (err < 0) return err; |
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err = nilfs_segctor_add_file_block(sci, bh, inode, sizeof(struct nilfs_binfo_v)); if (!err) sci->sc_datablk_cnt++; return err; } static int nilfs_collect_file_node(struct nilfs_sc_info *sci, struct buffer_head *bh, struct inode *inode) { |
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return nilfs_bmap_propagate(NILFS_I(inode)->i_bmap, bh); |
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} static int nilfs_collect_file_bmap(struct nilfs_sc_info *sci, struct buffer_head *bh, struct inode *inode) { |
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WARN_ON(!buffer_dirty(bh)); |
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return nilfs_segctor_add_file_block(sci, bh, inode, sizeof(__le64)); } static void nilfs_write_file_data_binfo(struct nilfs_sc_info *sci, struct nilfs_segsum_pointer *ssp, union nilfs_binfo *binfo) { struct nilfs_binfo_v *binfo_v = nilfs_segctor_map_segsum_entry( sci, ssp, sizeof(*binfo_v)); *binfo_v = binfo->bi_v; } static void nilfs_write_file_node_binfo(struct nilfs_sc_info *sci, struct nilfs_segsum_pointer *ssp, union nilfs_binfo *binfo) { __le64 *vblocknr = nilfs_segctor_map_segsum_entry( sci, ssp, sizeof(*vblocknr)); *vblocknr = binfo->bi_v.bi_vblocknr; } |
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static struct nilfs_sc_operations nilfs_sc_file_ops = { |
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.collect_data = nilfs_collect_file_data, .collect_node = nilfs_collect_file_node, .collect_bmap = nilfs_collect_file_bmap, .write_data_binfo = nilfs_write_file_data_binfo, .write_node_binfo = nilfs_write_file_node_binfo, }; static int nilfs_collect_dat_data(struct nilfs_sc_info *sci, struct buffer_head *bh, struct inode *inode) { int err; err = nilfs_bmap_propagate(NILFS_I(inode)->i_bmap, bh); |
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if (err < 0) return err; |
9ff05123e nilfs2: segment c... |
561 562 563 564 565 566 567 568 569 570 |
err = nilfs_segctor_add_file_block(sci, bh, inode, sizeof(__le64)); if (!err) sci->sc_datablk_cnt++; return err; } static int nilfs_collect_dat_bmap(struct nilfs_sc_info *sci, struct buffer_head *bh, struct inode *inode) { |
1f5abe7e7 nilfs2: replace B... |
571 |
WARN_ON(!buffer_dirty(bh)); |
9ff05123e nilfs2: segment c... |
572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 |
return nilfs_segctor_add_file_block(sci, bh, inode, sizeof(struct nilfs_binfo_dat)); } static void nilfs_write_dat_data_binfo(struct nilfs_sc_info *sci, struct nilfs_segsum_pointer *ssp, union nilfs_binfo *binfo) { __le64 *blkoff = nilfs_segctor_map_segsum_entry(sci, ssp, sizeof(*blkoff)); *blkoff = binfo->bi_dat.bi_blkoff; } static void nilfs_write_dat_node_binfo(struct nilfs_sc_info *sci, struct nilfs_segsum_pointer *ssp, union nilfs_binfo *binfo) { struct nilfs_binfo_dat *binfo_dat = nilfs_segctor_map_segsum_entry(sci, ssp, sizeof(*binfo_dat)); *binfo_dat = binfo->bi_dat; } |
4e819509c nilfs2: make nilf... |
593 |
static struct nilfs_sc_operations nilfs_sc_dat_ops = { |
9ff05123e nilfs2: segment c... |
594 595 596 597 598 599 |
.collect_data = nilfs_collect_dat_data, .collect_node = nilfs_collect_file_node, .collect_bmap = nilfs_collect_dat_bmap, .write_data_binfo = nilfs_write_dat_data_binfo, .write_node_binfo = nilfs_write_dat_node_binfo, }; |
4e819509c nilfs2: make nilf... |
600 |
static struct nilfs_sc_operations nilfs_sc_dsync_ops = { |
9ff05123e nilfs2: segment c... |
601 602 603 604 605 606 |
.collect_data = nilfs_collect_file_data, .collect_node = NULL, .collect_bmap = NULL, .write_data_binfo = nilfs_write_file_data_binfo, .write_node_binfo = NULL, }; |
f30bf3e40 nilfs2: fix misse... |
607 608 609 610 |
static size_t nilfs_lookup_dirty_data_buffers(struct inode *inode, struct list_head *listp, size_t nlimit, loff_t start, loff_t end) |
9ff05123e nilfs2: segment c... |
611 |
{ |
9ff05123e nilfs2: segment c... |
612 613 |
struct address_space *mapping = inode->i_mapping; struct pagevec pvec; |
f30bf3e40 nilfs2: fix misse... |
614 615 616 |
pgoff_t index = 0, last = ULONG_MAX; size_t ndirties = 0; int i; |
9ff05123e nilfs2: segment c... |
617 |
|
f30bf3e40 nilfs2: fix misse... |
618 619 620 621 622 623 624 625 626 |
if (unlikely(start != 0 || end != LLONG_MAX)) { /* * A valid range is given for sync-ing data pages. The * range is rounded to per-page; extra dirty buffers * may be included if blocksize < pagesize. */ index = start >> PAGE_SHIFT; last = end >> PAGE_SHIFT; } |
9ff05123e nilfs2: segment c... |
627 628 |
pagevec_init(&pvec, 0); repeat: |
f30bf3e40 nilfs2: fix misse... |
629 630 631 632 633 |
if (unlikely(index > last) || !pagevec_lookup_tag(&pvec, mapping, &index, PAGECACHE_TAG_DIRTY, min_t(pgoff_t, last - index, PAGEVEC_SIZE - 1) + 1)) return ndirties; |
9ff05123e nilfs2: segment c... |
634 635 636 637 |
for (i = 0; i < pagevec_count(&pvec); i++) { struct buffer_head *bh, *head; struct page *page = pvec.pages[i]; |
f30bf3e40 nilfs2: fix misse... |
638 639 |
if (unlikely(page->index > last)) break; |
aa405b1f4 nilfs2: always se... |
640 641 642 643 |
lock_page(page); if (!page_has_buffers(page)) create_empty_buffers(page, 1 << inode->i_blkbits, 0); unlock_page(page); |
9ff05123e nilfs2: segment c... |
644 645 646 |
bh = head = page_buffers(page); do { |
f30bf3e40 nilfs2: fix misse... |
647 648 649 650 651 652 653 654 655 |
if (!buffer_dirty(bh)) continue; get_bh(bh); list_add_tail(&bh->b_assoc_buffers, listp); ndirties++; if (unlikely(ndirties >= nlimit)) { pagevec_release(&pvec); cond_resched(); return ndirties; |
9ff05123e nilfs2: segment c... |
656 |
} |
f30bf3e40 nilfs2: fix misse... |
657 |
} while (bh = bh->b_this_page, bh != head); |
9ff05123e nilfs2: segment c... |
658 659 660 |
} pagevec_release(&pvec); cond_resched(); |
f30bf3e40 nilfs2: fix misse... |
661 |
goto repeat; |
9ff05123e nilfs2: segment c... |
662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 |
} static void nilfs_lookup_dirty_node_buffers(struct inode *inode, struct list_head *listp) { struct nilfs_inode_info *ii = NILFS_I(inode); struct address_space *mapping = &ii->i_btnode_cache; struct pagevec pvec; struct buffer_head *bh, *head; unsigned int i; pgoff_t index = 0; pagevec_init(&pvec, 0); while (pagevec_lookup_tag(&pvec, mapping, &index, PAGECACHE_TAG_DIRTY, PAGEVEC_SIZE)) { for (i = 0; i < pagevec_count(&pvec); i++) { bh = head = page_buffers(pvec.pages[i]); do { if (buffer_dirty(bh)) { get_bh(bh); list_add_tail(&bh->b_assoc_buffers, listp); } bh = bh->b_this_page; } while (bh != head); } pagevec_release(&pvec); cond_resched(); } } |
693dd3212 nilfs2: move s_in... |
693 |
static void nilfs_dispose_list(struct the_nilfs *nilfs, |
9ff05123e nilfs2: segment c... |
694 695 696 697 698 699 700 |
struct list_head *head, int force) { struct nilfs_inode_info *ii, *n; struct nilfs_inode_info *ivec[SC_N_INODEVEC], **pii; unsigned nv = 0; while (!list_empty(head)) { |
693dd3212 nilfs2: move s_in... |
701 |
spin_lock(&nilfs->ns_inode_lock); |
9ff05123e nilfs2: segment c... |
702 703 704 705 706 707 708 709 710 711 |
list_for_each_entry_safe(ii, n, head, i_dirty) { list_del_init(&ii->i_dirty); if (force) { if (unlikely(ii->i_bh)) { brelse(ii->i_bh); ii->i_bh = NULL; } } else if (test_bit(NILFS_I_DIRTY, &ii->i_state)) { set_bit(NILFS_I_QUEUED, &ii->i_state); list_add_tail(&ii->i_dirty, |
693dd3212 nilfs2: move s_in... |
712 |
&nilfs->ns_dirty_files); |
9ff05123e nilfs2: segment c... |
713 714 715 716 717 718 |
continue; } ivec[nv++] = ii; if (nv == SC_N_INODEVEC) break; } |
693dd3212 nilfs2: move s_in... |
719 |
spin_unlock(&nilfs->ns_inode_lock); |
9ff05123e nilfs2: segment c... |
720 721 722 723 724 |
for (pii = ivec; nv > 0; pii++, nv--) iput(&(*pii)->vfs_inode); } } |
e912a5b66 nilfs2: use root ... |
725 726 |
static int nilfs_test_metadata_dirty(struct the_nilfs *nilfs, struct nilfs_root *root) |
9ff05123e nilfs2: segment c... |
727 |
{ |
9ff05123e nilfs2: segment c... |
728 |
int ret = 0; |
e912a5b66 nilfs2: use root ... |
729 |
if (nilfs_mdt_fetch_dirty(root->ifile)) |
9ff05123e nilfs2: segment c... |
730 731 732 733 734 |
ret++; if (nilfs_mdt_fetch_dirty(nilfs->ns_cpfile)) ret++; if (nilfs_mdt_fetch_dirty(nilfs->ns_sufile)) ret++; |
365e215ce nilfs2: unfold ni... |
735 736 |
if ((ret || nilfs_doing_gc()) && nilfs_mdt_fetch_dirty(nilfs->ns_dat)) ret++; |
9ff05123e nilfs2: segment c... |
737 738 739 740 741 742 743 |
return ret; } static int nilfs_segctor_clean(struct nilfs_sc_info *sci) { return list_empty(&sci->sc_dirty_files) && !test_bit(NILFS_SC_DIRTY, &sci->sc_flags) && |
071cb4b81 nilfs2: eliminate... |
744 |
sci->sc_nfreesegs == 0 && |
9ff05123e nilfs2: segment c... |
745 746 747 748 749 |
(!nilfs_doing_gc() || list_empty(&sci->sc_gc_inodes)); } static int nilfs_segctor_confirm(struct nilfs_sc_info *sci) { |
e3154e974 nilfs2: get rid o... |
750 |
struct the_nilfs *nilfs = sci->sc_super->s_fs_info; |
9ff05123e nilfs2: segment c... |
751 |
int ret = 0; |
693dd3212 nilfs2: move s_in... |
752 |
if (nilfs_test_metadata_dirty(nilfs, sci->sc_root)) |
9ff05123e nilfs2: segment c... |
753 |
set_bit(NILFS_SC_DIRTY, &sci->sc_flags); |
693dd3212 nilfs2: move s_in... |
754 755 |
spin_lock(&nilfs->ns_inode_lock); if (list_empty(&nilfs->ns_dirty_files) && nilfs_segctor_clean(sci)) |
9ff05123e nilfs2: segment c... |
756 |
ret++; |
693dd3212 nilfs2: move s_in... |
757 |
spin_unlock(&nilfs->ns_inode_lock); |
9ff05123e nilfs2: segment c... |
758 759 760 761 762 |
return ret; } static void nilfs_segctor_clear_metadata_dirty(struct nilfs_sc_info *sci) { |
e3154e974 nilfs2: get rid o... |
763 |
struct the_nilfs *nilfs = sci->sc_super->s_fs_info; |
9ff05123e nilfs2: segment c... |
764 |
|
e912a5b66 nilfs2: use root ... |
765 |
nilfs_mdt_clear_dirty(sci->sc_root->ifile); |
9ff05123e nilfs2: segment c... |
766 767 |
nilfs_mdt_clear_dirty(nilfs->ns_cpfile); nilfs_mdt_clear_dirty(nilfs->ns_sufile); |
365e215ce nilfs2: unfold ni... |
768 |
nilfs_mdt_clear_dirty(nilfs->ns_dat); |
9ff05123e nilfs2: segment c... |
769 770 771 772 |
} static int nilfs_segctor_create_checkpoint(struct nilfs_sc_info *sci) { |
e3154e974 nilfs2: get rid o... |
773 |
struct the_nilfs *nilfs = sci->sc_super->s_fs_info; |
9ff05123e nilfs2: segment c... |
774 775 776 777 778 779 780 781 782 783 784 |
struct buffer_head *bh_cp; struct nilfs_checkpoint *raw_cp; int err; /* XXX: this interface will be changed */ err = nilfs_cpfile_get_checkpoint(nilfs->ns_cpfile, nilfs->ns_cno, 1, &raw_cp, &bh_cp); if (likely(!err)) { /* The following code is duplicated with cpfile. But, it is needed to collect the checkpoint even if it was not newly created */ |
5fc7b1417 nilfs2: use mark_... |
785 |
mark_buffer_dirty(bh_cp); |
9ff05123e nilfs2: segment c... |
786 787 788 |
nilfs_mdt_mark_dirty(nilfs->ns_cpfile); nilfs_cpfile_put_checkpoint( nilfs->ns_cpfile, nilfs->ns_cno, bh_cp); |
1f5abe7e7 nilfs2: replace B... |
789 790 |
} else WARN_ON(err == -EINVAL || err == -ENOENT); |
9ff05123e nilfs2: segment c... |
791 792 793 794 795 |
return err; } static int nilfs_segctor_fill_in_checkpoint(struct nilfs_sc_info *sci) { |
e3154e974 nilfs2: get rid o... |
796 |
struct the_nilfs *nilfs = sci->sc_super->s_fs_info; |
9ff05123e nilfs2: segment c... |
797 798 799 800 801 802 803 |
struct buffer_head *bh_cp; struct nilfs_checkpoint *raw_cp; int err; err = nilfs_cpfile_get_checkpoint(nilfs->ns_cpfile, nilfs->ns_cno, 0, &raw_cp, &bh_cp); if (unlikely(err)) { |
1f5abe7e7 nilfs2: replace B... |
804 |
WARN_ON(err == -EINVAL || err == -ENOENT); |
9ff05123e nilfs2: segment c... |
805 806 807 808 809 |
goto failed_ibh; } raw_cp->cp_snapshot_list.ssl_next = 0; raw_cp->cp_snapshot_list.ssl_prev = 0; raw_cp->cp_inodes_count = |
b7c063420 nilfs2: move inod... |
810 |
cpu_to_le64(atomic_read(&sci->sc_root->inodes_count)); |
9ff05123e nilfs2: segment c... |
811 |
raw_cp->cp_blocks_count = |
b7c063420 nilfs2: move inod... |
812 |
cpu_to_le64(atomic_read(&sci->sc_root->blocks_count)); |
9ff05123e nilfs2: segment c... |
813 814 815 816 |
raw_cp->cp_nblk_inc = cpu_to_le64(sci->sc_nblk_inc + sci->sc_nblk_this_inc); raw_cp->cp_create = cpu_to_le64(sci->sc_seg_ctime); raw_cp->cp_cno = cpu_to_le64(nilfs->ns_cno); |
458c5b082 nilfs2: clean up ... |
817 |
|
c96fa464a nilfs2: mark mino... |
818 819 820 821 |
if (test_bit(NILFS_SC_HAVE_DELTA, &sci->sc_flags)) nilfs_checkpoint_clear_minor(raw_cp); else nilfs_checkpoint_set_minor(raw_cp); |
e912a5b66 nilfs2: use root ... |
822 823 |
nilfs_write_inode_common(sci->sc_root->ifile, &raw_cp->cp_ifile_inode, 1); |
9ff05123e nilfs2: segment c... |
824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 |
nilfs_cpfile_put_checkpoint(nilfs->ns_cpfile, nilfs->ns_cno, bh_cp); return 0; failed_ibh: return err; } static void nilfs_fill_in_file_bmap(struct inode *ifile, struct nilfs_inode_info *ii) { struct buffer_head *ibh; struct nilfs_inode *raw_inode; if (test_bit(NILFS_I_BMAP, &ii->i_state)) { ibh = ii->i_bh; BUG_ON(!ibh); raw_inode = nilfs_ifile_map_inode(ifile, ii->vfs_inode.i_ino, ibh); nilfs_bmap_write(ii->i_bmap, raw_inode); nilfs_ifile_unmap_inode(ifile, ii->vfs_inode.i_ino, ibh); } } |
e912a5b66 nilfs2: use root ... |
847 |
static void nilfs_segctor_fill_in_file_bmap(struct nilfs_sc_info *sci) |
9ff05123e nilfs2: segment c... |
848 849 850 851 |
{ struct nilfs_inode_info *ii; list_for_each_entry(ii, &sci->sc_dirty_files, i_dirty) { |
e912a5b66 nilfs2: use root ... |
852 |
nilfs_fill_in_file_bmap(sci->sc_root->ifile, ii); |
9ff05123e nilfs2: segment c... |
853 854 |
set_bit(NILFS_I_COLLECTED, &ii->i_state); } |
9ff05123e nilfs2: segment c... |
855 |
} |
9ff05123e nilfs2: segment c... |
856 857 858 |
static void nilfs_segctor_fill_in_super_root(struct nilfs_sc_info *sci, struct the_nilfs *nilfs) { |
1e2b68bf2 nilfs2: move poin... |
859 860 |
struct buffer_head *bh_sr; struct nilfs_super_root *raw_sr; |
56eb55388 nilfs2: zero fill... |
861 |
unsigned isz, srsz; |
9ff05123e nilfs2: segment c... |
862 |
|
1e2b68bf2 nilfs2: move poin... |
863 864 |
bh_sr = NILFS_LAST_SEGBUF(&sci->sc_segbufs)->sb_super_root; raw_sr = (struct nilfs_super_root *)bh_sr->b_data; |
56eb55388 nilfs2: zero fill... |
865 866 |
isz = nilfs->ns_inode_size; srsz = NILFS_SR_BYTES(isz); |
1e2b68bf2 nilfs2: move poin... |
867 |
|
56eb55388 nilfs2: zero fill... |
868 |
raw_sr->sr_bytes = cpu_to_le16(srsz); |
9ff05123e nilfs2: segment c... |
869 870 871 872 |
raw_sr->sr_nongc_ctime = cpu_to_le64(nilfs_doing_gc() ? nilfs->ns_nongc_ctime : sci->sc_seg_ctime); raw_sr->sr_flags = 0; |
365e215ce nilfs2: unfold ni... |
873 |
nilfs_write_inode_common(nilfs->ns_dat, (void *)raw_sr + |
3961f0e27 nilfs2: eliminate... |
874 875 876 877 878 |
NILFS_SR_DAT_OFFSET(isz), 1); nilfs_write_inode_common(nilfs->ns_cpfile, (void *)raw_sr + NILFS_SR_CPFILE_OFFSET(isz), 1); nilfs_write_inode_common(nilfs->ns_sufile, (void *)raw_sr + NILFS_SR_SUFILE_OFFSET(isz), 1); |
56eb55388 nilfs2: zero fill... |
879 |
memset((void *)raw_sr + srsz, 0, nilfs->ns_blocksize - srsz); |
9ff05123e nilfs2: segment c... |
880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 |
} static void nilfs_redirty_inodes(struct list_head *head) { struct nilfs_inode_info *ii; list_for_each_entry(ii, head, i_dirty) { if (test_bit(NILFS_I_COLLECTED, &ii->i_state)) clear_bit(NILFS_I_COLLECTED, &ii->i_state); } } static void nilfs_drop_collected_inodes(struct list_head *head) { struct nilfs_inode_info *ii; list_for_each_entry(ii, head, i_dirty) { if (!test_and_clear_bit(NILFS_I_COLLECTED, &ii->i_state)) continue; clear_bit(NILFS_I_INODE_DIRTY, &ii->i_state); set_bit(NILFS_I_UPDATED, &ii->i_state); } } |
9ff05123e nilfs2: segment c... |
904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 |
static int nilfs_segctor_apply_buffers(struct nilfs_sc_info *sci, struct inode *inode, struct list_head *listp, int (*collect)(struct nilfs_sc_info *, struct buffer_head *, struct inode *)) { struct buffer_head *bh, *n; int err = 0; if (collect) { list_for_each_entry_safe(bh, n, listp, b_assoc_buffers) { list_del_init(&bh->b_assoc_buffers); err = collect(sci, bh, inode); brelse(bh); if (unlikely(err)) goto dispose_buffers; } return 0; } dispose_buffers: while (!list_empty(listp)) { |
0cc128388 nilfs2: use list_... |
927 928 |
bh = list_first_entry(listp, struct buffer_head, b_assoc_buffers); |
9ff05123e nilfs2: segment c... |
929 930 931 932 933 |
list_del_init(&bh->b_assoc_buffers); brelse(bh); } return err; } |
f30bf3e40 nilfs2: fix misse... |
934 935 936 937 938 939 |
static size_t nilfs_segctor_buffer_rest(struct nilfs_sc_info *sci) { /* Remaining number of blocks within segment buffer */ return sci->sc_segbuf_nblocks - (sci->sc_nblk_this_inc + sci->sc_curseg->sb_sum.nblocks); } |
9ff05123e nilfs2: segment c... |
940 941 942 943 944 945 |
static int nilfs_segctor_scan_file(struct nilfs_sc_info *sci, struct inode *inode, struct nilfs_sc_operations *sc_ops) { LIST_HEAD(data_buffers); LIST_HEAD(node_buffers); |
f30bf3e40 nilfs2: fix misse... |
946 |
int err; |
9ff05123e nilfs2: segment c... |
947 948 |
if (!(sci->sc_stage.flags & NILFS_CF_NODE)) { |
f30bf3e40 nilfs2: fix misse... |
949 950 951 952 953 954 |
size_t n, rest = nilfs_segctor_buffer_rest(sci); n = nilfs_lookup_dirty_data_buffers( inode, &data_buffers, rest + 1, 0, LLONG_MAX); if (n > rest) { err = nilfs_segctor_apply_buffers( |
9ff05123e nilfs2: segment c... |
955 |
sci, inode, &data_buffers, |
f30bf3e40 nilfs2: fix misse... |
956 957 |
sc_ops->collect_data); BUG_ON(!err); /* always receive -E2BIG or true error */ |
9ff05123e nilfs2: segment c... |
958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 |
goto break_or_fail; } } nilfs_lookup_dirty_node_buffers(inode, &node_buffers); if (!(sci->sc_stage.flags & NILFS_CF_NODE)) { err = nilfs_segctor_apply_buffers( sci, inode, &data_buffers, sc_ops->collect_data); if (unlikely(err)) { /* dispose node list */ nilfs_segctor_apply_buffers( sci, inode, &node_buffers, NULL); goto break_or_fail; } sci->sc_stage.flags |= NILFS_CF_NODE; } /* Collect node */ err = nilfs_segctor_apply_buffers( sci, inode, &node_buffers, sc_ops->collect_node); if (unlikely(err)) goto break_or_fail; nilfs_bmap_lookup_dirty_buffers(NILFS_I(inode)->i_bmap, &node_buffers); err = nilfs_segctor_apply_buffers( sci, inode, &node_buffers, sc_ops->collect_bmap); if (unlikely(err)) goto break_or_fail; nilfs_segctor_end_finfo(sci, inode); sci->sc_stage.flags &= ~NILFS_CF_NODE; break_or_fail: return err; } static int nilfs_segctor_scan_file_dsync(struct nilfs_sc_info *sci, struct inode *inode) { LIST_HEAD(data_buffers); |
f30bf3e40 nilfs2: fix misse... |
997 998 |
size_t n, rest = nilfs_segctor_buffer_rest(sci); int err; |
9ff05123e nilfs2: segment c... |
999 |
|
f30bf3e40 nilfs2: fix misse... |
1000 1001 1002 1003 1004 1005 1006 |
n = nilfs_lookup_dirty_data_buffers(inode, &data_buffers, rest + 1, sci->sc_dsync_start, sci->sc_dsync_end); err = nilfs_segctor_apply_buffers(sci, inode, &data_buffers, nilfs_collect_file_data); if (!err) { |
9ff05123e nilfs2: segment c... |
1007 |
nilfs_segctor_end_finfo(sci, inode); |
f30bf3e40 nilfs2: fix misse... |
1008 1009 1010 |
BUG_ON(n > rest); /* always receive -E2BIG or true error if n > rest */ } |
9ff05123e nilfs2: segment c... |
1011 1012 1013 1014 1015 |
return err; } static int nilfs_segctor_collect_blocks(struct nilfs_sc_info *sci, int mode) { |
e3154e974 nilfs2: get rid o... |
1016 |
struct the_nilfs *nilfs = sci->sc_super->s_fs_info; |
9ff05123e nilfs2: segment c... |
1017 1018 |
struct list_head *head; struct nilfs_inode_info *ii; |
071cb4b81 nilfs2: eliminate... |
1019 |
size_t ndone; |
9ff05123e nilfs2: segment c... |
1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 |
int err = 0; switch (sci->sc_stage.scnt) { case NILFS_ST_INIT: /* Pre-processes */ sci->sc_stage.flags = 0; if (!test_bit(NILFS_SC_UNCLOSED, &sci->sc_flags)) { sci->sc_nblk_inc = 0; sci->sc_curseg->sb_sum.flags = NILFS_SS_LOGBGN; if (mode == SC_LSEG_DSYNC) { sci->sc_stage.scnt = NILFS_ST_DSYNC; goto dsync_mode; } } sci->sc_stage.dirty_file_ptr = NULL; sci->sc_stage.gc_inode_ptr = NULL; if (mode == SC_FLUSH_DAT) { sci->sc_stage.scnt = NILFS_ST_DAT; goto dat_stage; } sci->sc_stage.scnt++; /* Fall through */ case NILFS_ST_GC: if (nilfs_doing_gc()) { head = &sci->sc_gc_inodes; ii = list_prepare_entry(sci->sc_stage.gc_inode_ptr, head, i_dirty); list_for_each_entry_continue(ii, head, i_dirty) { err = nilfs_segctor_scan_file( sci, &ii->vfs_inode, &nilfs_sc_file_ops); if (unlikely(err)) { sci->sc_stage.gc_inode_ptr = list_entry( ii->i_dirty.prev, struct nilfs_inode_info, i_dirty); goto break_or_fail; } set_bit(NILFS_I_COLLECTED, &ii->i_state); } sci->sc_stage.gc_inode_ptr = NULL; } sci->sc_stage.scnt++; /* Fall through */ case NILFS_ST_FILE: head = &sci->sc_dirty_files; ii = list_prepare_entry(sci->sc_stage.dirty_file_ptr, head, i_dirty); list_for_each_entry_continue(ii, head, i_dirty) { clear_bit(NILFS_I_DIRTY, &ii->i_state); err = nilfs_segctor_scan_file(sci, &ii->vfs_inode, &nilfs_sc_file_ops); if (unlikely(err)) { sci->sc_stage.dirty_file_ptr = list_entry(ii->i_dirty.prev, struct nilfs_inode_info, i_dirty); goto break_or_fail; } /* sci->sc_stage.dirty_file_ptr = NILFS_I(inode); */ /* XXX: required ? */ } sci->sc_stage.dirty_file_ptr = NULL; if (mode == SC_FLUSH_FILE) { sci->sc_stage.scnt = NILFS_ST_DONE; return 0; } |
9ff05123e nilfs2: segment c... |
1088 1089 1090 1091 |
sci->sc_stage.scnt++; sci->sc_stage.flags |= NILFS_CF_IFILE_STARTED; /* Fall through */ case NILFS_ST_IFILE: |
e912a5b66 nilfs2: use root ... |
1092 |
err = nilfs_segctor_scan_file(sci, sci->sc_root->ifile, |
9ff05123e nilfs2: segment c... |
1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 |
&nilfs_sc_file_ops); if (unlikely(err)) break; sci->sc_stage.scnt++; /* Creating a checkpoint */ err = nilfs_segctor_create_checkpoint(sci); if (unlikely(err)) break; /* Fall through */ case NILFS_ST_CPFILE: err = nilfs_segctor_scan_file(sci, nilfs->ns_cpfile, &nilfs_sc_file_ops); if (unlikely(err)) break; sci->sc_stage.scnt++; /* Fall through */ case NILFS_ST_SUFILE: |
071cb4b81 nilfs2: eliminate... |
1109 1110 1111 1112 1113 1114 |
err = nilfs_sufile_freev(nilfs->ns_sufile, sci->sc_freesegs, sci->sc_nfreesegs, &ndone); if (unlikely(err)) { nilfs_sufile_cancel_freev(nilfs->ns_sufile, sci->sc_freesegs, ndone, NULL); |
9ff05123e nilfs2: segment c... |
1115 |
break; |
071cb4b81 nilfs2: eliminate... |
1116 1117 |
} sci->sc_stage.flags |= NILFS_CF_SUFREED; |
9ff05123e nilfs2: segment c... |
1118 1119 1120 1121 1122 1123 1124 |
err = nilfs_segctor_scan_file(sci, nilfs->ns_sufile, &nilfs_sc_file_ops); if (unlikely(err)) break; sci->sc_stage.scnt++; /* Fall through */ case NILFS_ST_DAT: dat_stage: |
365e215ce nilfs2: unfold ni... |
1125 |
err = nilfs_segctor_scan_file(sci, nilfs->ns_dat, |
9ff05123e nilfs2: segment c... |
1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 |
&nilfs_sc_dat_ops); if (unlikely(err)) break; if (mode == SC_FLUSH_DAT) { sci->sc_stage.scnt = NILFS_ST_DONE; return 0; } sci->sc_stage.scnt++; /* Fall through */ case NILFS_ST_SR: if (mode == SC_LSEG_SR) { /* Appending a super root */ err = nilfs_segctor_add_super_root(sci); if (unlikely(err)) break; } /* End of a logical segment */ sci->sc_curseg->sb_sum.flags |= NILFS_SS_LOGEND; sci->sc_stage.scnt = NILFS_ST_DONE; return 0; case NILFS_ST_DSYNC: dsync_mode: sci->sc_curseg->sb_sum.flags |= NILFS_SS_SYNDT; |
f30bf3e40 nilfs2: fix misse... |
1148 |
ii = sci->sc_dsync_inode; |
9ff05123e nilfs2: segment c... |
1149 1150 1151 1152 1153 1154 |
if (!test_bit(NILFS_I_BUSY, &ii->i_state)) break; err = nilfs_segctor_scan_file_dsync(sci, &ii->vfs_inode); if (unlikely(err)) break; |
9ff05123e nilfs2: segment c... |
1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 |
sci->sc_curseg->sb_sum.flags |= NILFS_SS_LOGEND; sci->sc_stage.scnt = NILFS_ST_DONE; return 0; case NILFS_ST_DONE: return 0; default: BUG(); } break_or_fail: return err; } |
a694291a6 nilfs2: separate ... |
1167 1168 1169 1170 1171 |
/** * nilfs_segctor_begin_construction - setup segment buffer to make a new log * @sci: nilfs_sc_info * @nilfs: nilfs object */ |
9ff05123e nilfs2: segment c... |
1172 1173 1174 |
static int nilfs_segctor_begin_construction(struct nilfs_sc_info *sci, struct the_nilfs *nilfs) { |
a694291a6 nilfs2: separate ... |
1175 |
struct nilfs_segment_buffer *segbuf, *prev; |
9ff05123e nilfs2: segment c... |
1176 |
__u64 nextnum; |
a694291a6 nilfs2: separate ... |
1177 |
int err, alloc = 0; |
9ff05123e nilfs2: segment c... |
1178 |
|
a694291a6 nilfs2: separate ... |
1179 1180 1181 |
segbuf = nilfs_segbuf_new(sci->sc_super); if (unlikely(!segbuf)) return -ENOMEM; |
9ff05123e nilfs2: segment c... |
1182 |
|
a694291a6 nilfs2: separate ... |
1183 1184 1185 1186 1187 1188 1189 |
if (list_empty(&sci->sc_write_logs)) { nilfs_segbuf_map(segbuf, nilfs->ns_segnum, nilfs->ns_pseg_offset, nilfs); if (segbuf->sb_rest_blocks < NILFS_PSEG_MIN_BLOCKS) { nilfs_shift_to_next_segment(nilfs); nilfs_segbuf_map(segbuf, nilfs->ns_segnum, 0, nilfs); } |
9ff05123e nilfs2: segment c... |
1190 |
|
a694291a6 nilfs2: separate ... |
1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 |
segbuf->sb_sum.seg_seq = nilfs->ns_seg_seq; nextnum = nilfs->ns_nextnum; if (nilfs->ns_segnum == nilfs->ns_nextnum) /* Start from the head of a new full segment */ alloc++; } else { /* Continue logs */ prev = NILFS_LAST_SEGBUF(&sci->sc_write_logs); nilfs_segbuf_map_cont(segbuf, prev); segbuf->sb_sum.seg_seq = prev->sb_sum.seg_seq; nextnum = prev->sb_nextnum; if (segbuf->sb_rest_blocks < NILFS_PSEG_MIN_BLOCKS) { nilfs_segbuf_map(segbuf, prev->sb_nextnum, 0, nilfs); segbuf->sb_sum.seg_seq++; alloc++; } |
9ff05123e nilfs2: segment c... |
1209 |
} |
9ff05123e nilfs2: segment c... |
1210 |
|
61a189e9c nilfs2: move rout... |
1211 |
err = nilfs_sufile_mark_dirty(nilfs->ns_sufile, segbuf->sb_segnum); |
a694291a6 nilfs2: separate ... |
1212 1213 |
if (err) goto failed; |
9ff05123e nilfs2: segment c... |
1214 |
|
a694291a6 nilfs2: separate ... |
1215 |
if (alloc) { |
cece55207 nilfs2: simplify ... |
1216 |
err = nilfs_sufile_alloc(nilfs->ns_sufile, &nextnum); |
a694291a6 nilfs2: separate ... |
1217 1218 1219 |
if (err) goto failed; } |
9ff05123e nilfs2: segment c... |
1220 |
nilfs_segbuf_set_next_segnum(segbuf, nextnum, nilfs); |
a694291a6 nilfs2: separate ... |
1221 1222 1223 |
BUG_ON(!list_empty(&sci->sc_segbufs)); list_add_tail(&segbuf->sb_list, &sci->sc_segbufs); sci->sc_segbuf_nblocks = segbuf->sb_rest_blocks; |
cece55207 nilfs2: simplify ... |
1224 |
return 0; |
a694291a6 nilfs2: separate ... |
1225 1226 1227 1228 |
failed: nilfs_segbuf_free(segbuf); return err; |
9ff05123e nilfs2: segment c... |
1229 1230 1231 1232 1233 |
} static int nilfs_segctor_extend_segments(struct nilfs_sc_info *sci, struct the_nilfs *nilfs, int nadd) { |
e29df395b nilfs2: add itera... |
1234 |
struct nilfs_segment_buffer *segbuf, *prev; |
9ff05123e nilfs2: segment c... |
1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 |
struct inode *sufile = nilfs->ns_sufile; __u64 nextnextnum; LIST_HEAD(list); int err, ret, i; prev = NILFS_LAST_SEGBUF(&sci->sc_segbufs); /* * Since the segment specified with nextnum might be allocated during * the previous construction, the buffer including its segusage may * not be dirty. The following call ensures that the buffer is dirty * and will pin the buffer on memory until the sufile is written. */ |
61a189e9c nilfs2: move rout... |
1247 |
err = nilfs_sufile_mark_dirty(sufile, prev->sb_nextnum); |
9ff05123e nilfs2: segment c... |
1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 |
if (unlikely(err)) return err; for (i = 0; i < nadd; i++) { /* extend segment info */ err = -ENOMEM; segbuf = nilfs_segbuf_new(sci->sc_super); if (unlikely(!segbuf)) goto failed; /* map this buffer to region of segment on-disk */ |
cece55207 nilfs2: simplify ... |
1259 |
nilfs_segbuf_map(segbuf, prev->sb_nextnum, 0, nilfs); |
9ff05123e nilfs2: segment c... |
1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 |
sci->sc_segbuf_nblocks += segbuf->sb_rest_blocks; /* allocate the next next full segment */ err = nilfs_sufile_alloc(sufile, &nextnextnum); if (unlikely(err)) goto failed_segbuf; segbuf->sb_sum.seg_seq = prev->sb_sum.seg_seq + 1; nilfs_segbuf_set_next_segnum(segbuf, nextnextnum, nilfs); list_add_tail(&segbuf->sb_list, &list); prev = segbuf; } |
0935db747 nilfs2: use list_... |
1273 |
list_splice_tail(&list, &sci->sc_segbufs); |
9ff05123e nilfs2: segment c... |
1274 1275 1276 1277 1278 |
return 0; failed_segbuf: nilfs_segbuf_free(segbuf); failed: |
e29df395b nilfs2: add itera... |
1279 |
list_for_each_entry(segbuf, &list, sb_list) { |
9ff05123e nilfs2: segment c... |
1280 |
ret = nilfs_sufile_free(sufile, segbuf->sb_nextnum); |
1f5abe7e7 nilfs2: replace B... |
1281 |
WARN_ON(ret); /* never fails */ |
9ff05123e nilfs2: segment c... |
1282 |
} |
e29df395b nilfs2: add itera... |
1283 |
nilfs_destroy_logs(&list); |
9ff05123e nilfs2: segment c... |
1284 1285 |
return err; } |
a694291a6 nilfs2: separate ... |
1286 1287 |
static void nilfs_free_incomplete_logs(struct list_head *logs, struct the_nilfs *nilfs) |
9ff05123e nilfs2: segment c... |
1288 |
{ |
a694291a6 nilfs2: separate ... |
1289 1290 |
struct nilfs_segment_buffer *segbuf, *prev; struct inode *sufile = nilfs->ns_sufile; |
9284ad2a9 nilfs2: relocate ... |
1291 |
int ret; |
9ff05123e nilfs2: segment c... |
1292 |
|
a694291a6 nilfs2: separate ... |
1293 |
segbuf = NILFS_FIRST_SEGBUF(logs); |
9ff05123e nilfs2: segment c... |
1294 |
if (nilfs->ns_nextnum != segbuf->sb_nextnum) { |
a694291a6 nilfs2: separate ... |
1295 |
ret = nilfs_sufile_free(sufile, segbuf->sb_nextnum); |
1f5abe7e7 nilfs2: replace B... |
1296 |
WARN_ON(ret); /* never fails */ |
9ff05123e nilfs2: segment c... |
1297 |
} |
9284ad2a9 nilfs2: relocate ... |
1298 |
if (atomic_read(&segbuf->sb_err)) { |
9ff05123e nilfs2: segment c... |
1299 1300 1301 1302 1303 1304 1305 1306 |
/* Case 1: The first segment failed */ if (segbuf->sb_pseg_start != segbuf->sb_fseg_start) /* Case 1a: Partial segment appended into an existing segment */ nilfs_terminate_segment(nilfs, segbuf->sb_fseg_start, segbuf->sb_fseg_end); else /* Case 1b: New full segment */ set_nilfs_discontinued(nilfs); |
9ff05123e nilfs2: segment c... |
1307 |
} |
a694291a6 nilfs2: separate ... |
1308 1309 1310 1311 1312 1313 |
prev = segbuf; list_for_each_entry_continue(segbuf, logs, sb_list) { if (prev->sb_nextnum != segbuf->sb_nextnum) { ret = nilfs_sufile_free(sufile, segbuf->sb_nextnum); WARN_ON(ret); /* never fails */ } |
9284ad2a9 nilfs2: relocate ... |
1314 1315 1316 |
if (atomic_read(&segbuf->sb_err) && segbuf->sb_segnum != nilfs->ns_nextnum) /* Case 2: extended segment (!= next) failed */ |
a694291a6 nilfs2: separate ... |
1317 1318 |
nilfs_sufile_set_error(sufile, segbuf->sb_segnum); prev = segbuf; |
9ff05123e nilfs2: segment c... |
1319 |
} |
9ff05123e nilfs2: segment c... |
1320 1321 1322 1323 1324 1325 |
} static void nilfs_segctor_update_segusage(struct nilfs_sc_info *sci, struct inode *sufile) { struct nilfs_segment_buffer *segbuf; |
9ff05123e nilfs2: segment c... |
1326 1327 1328 1329 |
unsigned long live_blocks; int ret; list_for_each_entry(segbuf, &sci->sc_segbufs, sb_list) { |
9ff05123e nilfs2: segment c... |
1330 1331 |
live_blocks = segbuf->sb_sum.nblocks + (segbuf->sb_pseg_start - segbuf->sb_fseg_start); |
071ec54dd nilfs2: move rout... |
1332 1333 1334 1335 |
ret = nilfs_sufile_set_segment_usage(sufile, segbuf->sb_segnum, live_blocks, sci->sc_seg_ctime); WARN_ON(ret); /* always succeed because the segusage is dirty */ |
9ff05123e nilfs2: segment c... |
1336 1337 |
} } |
a694291a6 nilfs2: separate ... |
1338 |
static void nilfs_cancel_segusage(struct list_head *logs, struct inode *sufile) |
9ff05123e nilfs2: segment c... |
1339 1340 |
{ struct nilfs_segment_buffer *segbuf; |
9ff05123e nilfs2: segment c... |
1341 |
int ret; |
a694291a6 nilfs2: separate ... |
1342 |
segbuf = NILFS_FIRST_SEGBUF(logs); |
071ec54dd nilfs2: move rout... |
1343 1344 1345 1346 |
ret = nilfs_sufile_set_segment_usage(sufile, segbuf->sb_segnum, segbuf->sb_pseg_start - segbuf->sb_fseg_start, 0); WARN_ON(ret); /* always succeed because the segusage is dirty */ |
9ff05123e nilfs2: segment c... |
1347 |
|
a694291a6 nilfs2: separate ... |
1348 |
list_for_each_entry_continue(segbuf, logs, sb_list) { |
071ec54dd nilfs2: move rout... |
1349 1350 |
ret = nilfs_sufile_set_segment_usage(sufile, segbuf->sb_segnum, 0, 0); |
1f5abe7e7 nilfs2: replace B... |
1351 |
WARN_ON(ret); /* always succeed */ |
9ff05123e nilfs2: segment c... |
1352 1353 1354 1355 1356 1357 1358 |
} } static void nilfs_segctor_truncate_segments(struct nilfs_sc_info *sci, struct nilfs_segment_buffer *last, struct inode *sufile) { |
e29df395b nilfs2: add itera... |
1359 |
struct nilfs_segment_buffer *segbuf = last; |
9ff05123e nilfs2: segment c... |
1360 |
int ret; |
e29df395b nilfs2: add itera... |
1361 |
list_for_each_entry_continue(segbuf, &sci->sc_segbufs, sb_list) { |
9ff05123e nilfs2: segment c... |
1362 1363 |
sci->sc_segbuf_nblocks -= segbuf->sb_rest_blocks; ret = nilfs_sufile_free(sufile, segbuf->sb_nextnum); |
1f5abe7e7 nilfs2: replace B... |
1364 |
WARN_ON(ret); |
9ff05123e nilfs2: segment c... |
1365 |
} |
e29df395b nilfs2: add itera... |
1366 |
nilfs_truncate_logs(&sci->sc_segbufs, last); |
9ff05123e nilfs2: segment c... |
1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 |
} static int nilfs_segctor_collect(struct nilfs_sc_info *sci, struct the_nilfs *nilfs, int mode) { struct nilfs_cstage prev_stage = sci->sc_stage; int err, nadd = 1; /* Collection retry loop */ for (;;) { |
9ff05123e nilfs2: segment c... |
1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 |
sci->sc_nblk_this_inc = 0; sci->sc_curseg = NILFS_FIRST_SEGBUF(&sci->sc_segbufs); err = nilfs_segctor_reset_segment_buffer(sci); if (unlikely(err)) goto failed; err = nilfs_segctor_collect_blocks(sci, mode); sci->sc_nblk_this_inc += sci->sc_curseg->sb_sum.nblocks; if (!err) break; if (unlikely(err != -E2BIG)) goto failed; /* The current segment is filled up */ if (mode != SC_LSEG_SR || sci->sc_stage.scnt < NILFS_ST_CPFILE) break; |
2d8428aca nilfs2: fix dupli... |
1396 1397 1398 1399 1400 |
nilfs_clear_logs(&sci->sc_segbufs); err = nilfs_segctor_extend_segments(sci, nilfs, nadd); if (unlikely(err)) return err; |
071cb4b81 nilfs2: eliminate... |
1401 1402 1403 1404 1405 1406 1407 |
if (sci->sc_stage.flags & NILFS_CF_SUFREED) { err = nilfs_sufile_cancel_freev(nilfs->ns_sufile, sci->sc_freesegs, sci->sc_nfreesegs, NULL); WARN_ON(err); /* do not happen */ } |
9ff05123e nilfs2: segment c... |
1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 |
nadd = min_t(int, nadd << 1, SC_MAX_SEGDELTA); sci->sc_stage = prev_stage; } nilfs_segctor_truncate_segments(sci, sci->sc_curseg, nilfs->ns_sufile); return 0; failed: return err; } static void nilfs_list_replace_buffer(struct buffer_head *old_bh, struct buffer_head *new_bh) { BUG_ON(!list_empty(&new_bh->b_assoc_buffers)); list_replace_init(&old_bh->b_assoc_buffers, &new_bh->b_assoc_buffers); /* The caller must release old_bh */ } static int nilfs_segctor_update_payload_blocknr(struct nilfs_sc_info *sci, struct nilfs_segment_buffer *segbuf, int mode) { struct inode *inode = NULL; sector_t blocknr; unsigned long nfinfo = segbuf->sb_sum.nfinfo; unsigned long nblocks = 0, ndatablk = 0; struct nilfs_sc_operations *sc_op = NULL; struct nilfs_segsum_pointer ssp; struct nilfs_finfo *finfo = NULL; union nilfs_binfo binfo; struct buffer_head *bh, *bh_org; ino_t ino = 0; int err = 0; if (!nfinfo) goto out; blocknr = segbuf->sb_pseg_start + segbuf->sb_sum.nsumblk; ssp.bh = NILFS_SEGBUF_FIRST_BH(&segbuf->sb_segsum_buffers); ssp.offset = sizeof(struct nilfs_segment_summary); list_for_each_entry(bh, &segbuf->sb_payload_buffers, b_assoc_buffers) { |
1e2b68bf2 nilfs2: move poin... |
1452 |
if (bh == segbuf->sb_super_root) |
9ff05123e nilfs2: segment c... |
1453 1454 1455 1456 1457 1458 1459 |
break; if (!finfo) { finfo = nilfs_segctor_map_segsum_entry( sci, &ssp, sizeof(*finfo)); ino = le64_to_cpu(finfo->fi_ino); nblocks = le32_to_cpu(finfo->fi_nblocks); ndatablk = le32_to_cpu(finfo->fi_ndatablk); |
aa405b1f4 nilfs2: always se... |
1460 |
inode = bh->b_page->mapping->host; |
9ff05123e nilfs2: segment c... |
1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 |
if (mode == SC_LSEG_DSYNC) sc_op = &nilfs_sc_dsync_ops; else if (ino == NILFS_DAT_INO) sc_op = &nilfs_sc_dat_ops; else /* file blocks */ sc_op = &nilfs_sc_file_ops; } bh_org = bh; get_bh(bh_org); err = nilfs_bmap_assign(NILFS_I(inode)->i_bmap, &bh, blocknr, &binfo); if (bh != bh_org) nilfs_list_replace_buffer(bh_org, bh); brelse(bh_org); if (unlikely(err)) goto failed_bmap; if (ndatablk > 0) sc_op->write_data_binfo(sci, &ssp, &binfo); else sc_op->write_node_binfo(sci, &ssp, &binfo); blocknr++; if (--nblocks == 0) { finfo = NULL; if (--nfinfo == 0) break; } else if (ndatablk > 0) ndatablk--; } out: return 0; failed_bmap: |
9ff05123e nilfs2: segment c... |
1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 |
return err; } static int nilfs_segctor_assign(struct nilfs_sc_info *sci, int mode) { struct nilfs_segment_buffer *segbuf; int err; list_for_each_entry(segbuf, &sci->sc_segbufs, sb_list) { err = nilfs_segctor_update_payload_blocknr(sci, segbuf, mode); if (unlikely(err)) return err; nilfs_segbuf_fill_in_segsum(segbuf); } return 0; } |
1cb2d38cb nilfs2: get rid o... |
1512 |
static void nilfs_begin_page_io(struct page *page) |
9ff05123e nilfs2: segment c... |
1513 1514 1515 1516 |
{ if (!page || PageWriteback(page)) /* For split b-tree node pages, this function may be called twice. We ignore the 2nd or later calls by this check. */ |
1cb2d38cb nilfs2: get rid o... |
1517 |
return; |
9ff05123e nilfs2: segment c... |
1518 1519 1520 1521 1522 |
lock_page(page); clear_page_dirty_for_io(page); set_page_writeback(page); unlock_page(page); |
9ff05123e nilfs2: segment c... |
1523 |
} |
1cb2d38cb nilfs2: get rid o... |
1524 |
static void nilfs_segctor_prepare_write(struct nilfs_sc_info *sci) |
9ff05123e nilfs2: segment c... |
1525 1526 1527 |
{ struct nilfs_segment_buffer *segbuf; struct page *bd_page = NULL, *fs_page = NULL; |
9ff05123e nilfs2: segment c... |
1528 |
|
9ff05123e nilfs2: segment c... |
1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 |
list_for_each_entry(segbuf, &sci->sc_segbufs, sb_list) { struct buffer_head *bh; list_for_each_entry(bh, &segbuf->sb_segsum_buffers, b_assoc_buffers) { if (bh->b_page != bd_page) { if (bd_page) { lock_page(bd_page); clear_page_dirty_for_io(bd_page); set_page_writeback(bd_page); unlock_page(bd_page); } bd_page = bh->b_page; } } list_for_each_entry(bh, &segbuf->sb_payload_buffers, b_assoc_buffers) { |
1e2b68bf2 nilfs2: move poin... |
1547 |
if (bh == segbuf->sb_super_root) { |
9ff05123e nilfs2: segment c... |
1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 |
if (bh->b_page != bd_page) { lock_page(bd_page); clear_page_dirty_for_io(bd_page); set_page_writeback(bd_page); unlock_page(bd_page); bd_page = bh->b_page; } break; } if (bh->b_page != fs_page) { |
1cb2d38cb nilfs2: get rid o... |
1558 |
nilfs_begin_page_io(fs_page); |
9ff05123e nilfs2: segment c... |
1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 |
fs_page = bh->b_page; } } } if (bd_page) { lock_page(bd_page); clear_page_dirty_for_io(bd_page); set_page_writeback(bd_page); unlock_page(bd_page); } |
1cb2d38cb nilfs2: get rid o... |
1569 |
nilfs_begin_page_io(fs_page); |
9ff05123e nilfs2: segment c... |
1570 1571 1572 |
} static int nilfs_segctor_write(struct nilfs_sc_info *sci, |
9c965bac1 nilfs2: hide nilf... |
1573 |
struct the_nilfs *nilfs) |
9ff05123e nilfs2: segment c... |
1574 |
{ |
d1c6b72a7 nilfs2: move iter... |
1575 |
int ret; |
9ff05123e nilfs2: segment c... |
1576 |
|
d1c6b72a7 nilfs2: move iter... |
1577 |
ret = nilfs_write_logs(&sci->sc_segbufs, nilfs); |
a694291a6 nilfs2: separate ... |
1578 1579 |
list_splice_tail_init(&sci->sc_segbufs, &sci->sc_write_logs); return ret; |
9ff05123e nilfs2: segment c... |
1580 |
} |
9ff05123e nilfs2: segment c... |
1581 1582 1583 1584 |
static void nilfs_end_page_io(struct page *page, int err) { if (!page) return; |
a97778457 nilfs2: fix oops ... |
1585 |
if (buffer_nilfs_node(page_buffers(page)) && !PageWriteback(page)) { |
8227b2972 nilfs2: fix hang ... |
1586 1587 1588 1589 |
/* * For b-tree node pages, this function may be called twice * or more because they might be split in a segment. */ |
a97778457 nilfs2: fix oops ... |
1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 |
if (PageDirty(page)) { /* * For pages holding split b-tree node buffers, dirty * flag on the buffers may be cleared discretely. * In that case, the page is once redirtied for * remaining buffers, and it must be cancelled if * all the buffers get cleaned later. */ lock_page(page); if (nilfs_page_buffers_clean(page)) __nilfs_clear_page_dirty(page); unlock_page(page); } |
9ff05123e nilfs2: segment c... |
1603 |
return; |
a97778457 nilfs2: fix oops ... |
1604 |
} |
9ff05123e nilfs2: segment c... |
1605 |
|
1cb2d38cb nilfs2: get rid o... |
1606 1607 1608 1609 1610 1611 1612 |
if (!err) { if (!nilfs_page_buffers_clean(page)) __set_page_dirty_nobuffers(page); ClearPageError(page); } else { __set_page_dirty_nobuffers(page); SetPageError(page); |
9ff05123e nilfs2: segment c... |
1613 |
} |
1cb2d38cb nilfs2: get rid o... |
1614 1615 |
end_page_writeback(page); |
9ff05123e nilfs2: segment c... |
1616 |
} |
1cb2d38cb nilfs2: get rid o... |
1617 |
static void nilfs_abort_logs(struct list_head *logs, int err) |
9ff05123e nilfs2: segment c... |
1618 1619 1620 |
{ struct nilfs_segment_buffer *segbuf; struct page *bd_page = NULL, *fs_page = NULL; |
a694291a6 nilfs2: separate ... |
1621 |
struct buffer_head *bh; |
9ff05123e nilfs2: segment c... |
1622 |
|
a694291a6 nilfs2: separate ... |
1623 1624 |
if (list_empty(logs)) return; |
9ff05123e nilfs2: segment c... |
1625 |
|
a694291a6 nilfs2: separate ... |
1626 |
list_for_each_entry(segbuf, logs, sb_list) { |
9ff05123e nilfs2: segment c... |
1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 |
list_for_each_entry(bh, &segbuf->sb_segsum_buffers, b_assoc_buffers) { if (bh->b_page != bd_page) { if (bd_page) end_page_writeback(bd_page); bd_page = bh->b_page; } } list_for_each_entry(bh, &segbuf->sb_payload_buffers, b_assoc_buffers) { |
1e2b68bf2 nilfs2: move poin... |
1638 |
if (bh == segbuf->sb_super_root) { |
9ff05123e nilfs2: segment c... |
1639 1640 1641 1642 1643 1644 1645 1646 |
if (bh->b_page != bd_page) { end_page_writeback(bd_page); bd_page = bh->b_page; } break; } if (bh->b_page != fs_page) { nilfs_end_page_io(fs_page, err); |
9ff05123e nilfs2: segment c... |
1647 1648 1649 1650 1651 1652 1653 1654 |
fs_page = bh->b_page; } } } if (bd_page) end_page_writeback(bd_page); nilfs_end_page_io(fs_page, err); |
a694291a6 nilfs2: separate ... |
1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 |
} static void nilfs_segctor_abort_construction(struct nilfs_sc_info *sci, struct the_nilfs *nilfs, int err) { LIST_HEAD(logs); int ret; list_splice_tail_init(&sci->sc_write_logs, &logs); ret = nilfs_wait_on_logs(&logs); |
1cb2d38cb nilfs2: get rid o... |
1665 |
nilfs_abort_logs(&logs, ret ? : err); |
a694291a6 nilfs2: separate ... |
1666 1667 1668 1669 |
list_splice_tail_init(&sci->sc_segbufs, &logs); nilfs_cancel_segusage(&logs, nilfs->ns_sufile); nilfs_free_incomplete_logs(&logs, nilfs); |
a694291a6 nilfs2: separate ... |
1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 |
if (sci->sc_stage.flags & NILFS_CF_SUFREED) { ret = nilfs_sufile_cancel_freev(nilfs->ns_sufile, sci->sc_freesegs, sci->sc_nfreesegs, NULL); WARN_ON(ret); /* do not happen */ } nilfs_destroy_logs(&logs); |
9ff05123e nilfs2: segment c... |
1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 |
} static void nilfs_set_next_segment(struct the_nilfs *nilfs, struct nilfs_segment_buffer *segbuf) { nilfs->ns_segnum = segbuf->sb_segnum; nilfs->ns_nextnum = segbuf->sb_nextnum; nilfs->ns_pseg_offset = segbuf->sb_pseg_start - segbuf->sb_fseg_start + segbuf->sb_sum.nblocks; nilfs->ns_seg_seq = segbuf->sb_sum.seg_seq; nilfs->ns_ctime = segbuf->sb_sum.ctime; } static void nilfs_segctor_complete_write(struct nilfs_sc_info *sci) { struct nilfs_segment_buffer *segbuf; struct page *bd_page = NULL, *fs_page = NULL; |
e3154e974 nilfs2: get rid o... |
1697 |
struct the_nilfs *nilfs = sci->sc_super->s_fs_info; |
1e2b68bf2 nilfs2: move poin... |
1698 |
int update_sr = false; |
9ff05123e nilfs2: segment c... |
1699 |
|
a694291a6 nilfs2: separate ... |
1700 |
list_for_each_entry(segbuf, &sci->sc_write_logs, sb_list) { |
9ff05123e nilfs2: segment c... |
1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 |
struct buffer_head *bh; list_for_each_entry(bh, &segbuf->sb_segsum_buffers, b_assoc_buffers) { set_buffer_uptodate(bh); clear_buffer_dirty(bh); if (bh->b_page != bd_page) { if (bd_page) end_page_writeback(bd_page); bd_page = bh->b_page; } } /* * We assume that the buffers which belong to the same page * continue over the buffer list. * Under this assumption, the last BHs of pages is * identifiable by the discontinuity of bh->b_page * (page != fs_page). * * For B-tree node blocks, however, this assumption is not * guaranteed. The cleanup code of B-tree node pages needs * special care. */ list_for_each_entry(bh, &segbuf->sb_payload_buffers, b_assoc_buffers) { set_buffer_uptodate(bh); clear_buffer_dirty(bh); |
27e6c7a3c nilfs2: mark buff... |
1728 |
clear_buffer_delay(bh); |
9ff05123e nilfs2: segment c... |
1729 |
clear_buffer_nilfs_volatile(bh); |
b1f6a4f29 nilfs2: add routi... |
1730 |
clear_buffer_nilfs_redirected(bh); |
1e2b68bf2 nilfs2: move poin... |
1731 |
if (bh == segbuf->sb_super_root) { |
9ff05123e nilfs2: segment c... |
1732 1733 1734 1735 |
if (bh->b_page != bd_page) { end_page_writeback(bd_page); bd_page = bh->b_page; } |
1e2b68bf2 nilfs2: move poin... |
1736 |
update_sr = true; |
9ff05123e nilfs2: segment c... |
1737 1738 1739 1740 1741 1742 1743 |
break; } if (bh->b_page != fs_page) { nilfs_end_page_io(fs_page, 0); fs_page = bh->b_page; } } |
4762077c7 nilfs2: get rid o... |
1744 1745 |
if (!nilfs_segbuf_simplex(segbuf)) { if (segbuf->sb_sum.flags & NILFS_SS_LOGBGN) { |
9ff05123e nilfs2: segment c... |
1746 1747 1748 |
set_bit(NILFS_SC_UNCLOSED, &sci->sc_flags); sci->sc_lseg_stime = jiffies; } |
4762077c7 nilfs2: get rid o... |
1749 |
if (segbuf->sb_sum.flags & NILFS_SS_LOGEND) |
9ff05123e nilfs2: segment c... |
1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 |
clear_bit(NILFS_SC_UNCLOSED, &sci->sc_flags); } } /* * Since pages may continue over multiple segment buffers, * end of the last page must be checked outside of the loop. */ if (bd_page) end_page_writeback(bd_page); nilfs_end_page_io(fs_page, 0); |
9ff05123e nilfs2: segment c... |
1761 |
nilfs_drop_collected_inodes(&sci->sc_dirty_files); |
c1c1d7092 nilfs2: get rid o... |
1762 |
if (nilfs_doing_gc()) |
9ff05123e nilfs2: segment c... |
1763 |
nilfs_drop_collected_inodes(&sci->sc_gc_inodes); |
c1c1d7092 nilfs2: get rid o... |
1764 |
else |
9ff05123e nilfs2: segment c... |
1765 |
nilfs->ns_nongc_ctime = sci->sc_seg_ctime; |
9ff05123e nilfs2: segment c... |
1766 1767 |
sci->sc_nblk_inc += sci->sc_nblk_this_inc; |
a694291a6 nilfs2: separate ... |
1768 |
segbuf = NILFS_LAST_SEGBUF(&sci->sc_write_logs); |
9ff05123e nilfs2: segment c... |
1769 1770 1771 1772 |
nilfs_set_next_segment(nilfs, segbuf); if (update_sr) { nilfs_set_last_segment(nilfs, segbuf->sb_pseg_start, |
e339ad31f nilfs2: introduce... |
1773 |
segbuf->sb_sum.seg_seq, nilfs->ns_cno++); |
9ff05123e nilfs2: segment c... |
1774 |
|
c96fa464a nilfs2: mark mino... |
1775 |
clear_bit(NILFS_SC_HAVE_DELTA, &sci->sc_flags); |
9ff05123e nilfs2: segment c... |
1776 1777 |
clear_bit(NILFS_SC_DIRTY, &sci->sc_flags); set_bit(NILFS_SC_SUPER_ROOT, &sci->sc_flags); |
a694291a6 nilfs2: separate ... |
1778 |
nilfs_segctor_clear_metadata_dirty(sci); |
9ff05123e nilfs2: segment c... |
1779 1780 1781 |
} else clear_bit(NILFS_SC_SUPER_ROOT, &sci->sc_flags); } |
a694291a6 nilfs2: separate ... |
1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 |
static int nilfs_segctor_wait(struct nilfs_sc_info *sci) { int ret; ret = nilfs_wait_on_logs(&sci->sc_write_logs); if (!ret) { nilfs_segctor_complete_write(sci); nilfs_destroy_logs(&sci->sc_write_logs); } return ret; } |
693dd3212 nilfs2: move s_in... |
1793 1794 |
static int nilfs_segctor_collect_dirty_files(struct nilfs_sc_info *sci, struct the_nilfs *nilfs) |
9ff05123e nilfs2: segment c... |
1795 1796 |
{ struct nilfs_inode_info *ii, *n; |
e912a5b66 nilfs2: use root ... |
1797 |
struct inode *ifile = sci->sc_root->ifile; |
9ff05123e nilfs2: segment c... |
1798 |
|
693dd3212 nilfs2: move s_in... |
1799 |
spin_lock(&nilfs->ns_inode_lock); |
9ff05123e nilfs2: segment c... |
1800 |
retry: |
693dd3212 nilfs2: move s_in... |
1801 |
list_for_each_entry_safe(ii, n, &nilfs->ns_dirty_files, i_dirty) { |
9ff05123e nilfs2: segment c... |
1802 1803 1804 |
if (!ii->i_bh) { struct buffer_head *ibh; int err; |
693dd3212 nilfs2: move s_in... |
1805 |
spin_unlock(&nilfs->ns_inode_lock); |
9ff05123e nilfs2: segment c... |
1806 |
err = nilfs_ifile_get_inode_block( |
e912a5b66 nilfs2: use root ... |
1807 |
ifile, ii->vfs_inode.i_ino, &ibh); |
9ff05123e nilfs2: segment c... |
1808 |
if (unlikely(err)) { |
693dd3212 nilfs2: move s_in... |
1809 |
nilfs_warning(sci->sc_super, __func__, |
9ff05123e nilfs2: segment c... |
1810 1811 1812 1813 |
"failed to get inode block. "); return err; } |
5fc7b1417 nilfs2: use mark_... |
1814 |
mark_buffer_dirty(ibh); |
e912a5b66 nilfs2: use root ... |
1815 |
nilfs_mdt_mark_dirty(ifile); |
693dd3212 nilfs2: move s_in... |
1816 |
spin_lock(&nilfs->ns_inode_lock); |
9ff05123e nilfs2: segment c... |
1817 1818 1819 1820 1821 1822 |
if (likely(!ii->i_bh)) ii->i_bh = ibh; else brelse(ibh); goto retry; } |
9ff05123e nilfs2: segment c... |
1823 1824 1825 |
clear_bit(NILFS_I_QUEUED, &ii->i_state); set_bit(NILFS_I_BUSY, &ii->i_state); |
eaae0f37d nilfs2: merge lis... |
1826 |
list_move_tail(&ii->i_dirty, &sci->sc_dirty_files); |
9ff05123e nilfs2: segment c... |
1827 |
} |
693dd3212 nilfs2: move s_in... |
1828 |
spin_unlock(&nilfs->ns_inode_lock); |
9ff05123e nilfs2: segment c... |
1829 |
|
9ff05123e nilfs2: segment c... |
1830 1831 |
return 0; } |
693dd3212 nilfs2: move s_in... |
1832 1833 |
static void nilfs_segctor_drop_written_files(struct nilfs_sc_info *sci, struct the_nilfs *nilfs) |
9ff05123e nilfs2: segment c... |
1834 1835 1836 |
{ struct nilfs_transaction_info *ti = current->journal_info; struct nilfs_inode_info *ii, *n; |
9ff05123e nilfs2: segment c... |
1837 |
|
693dd3212 nilfs2: move s_in... |
1838 |
spin_lock(&nilfs->ns_inode_lock); |
9ff05123e nilfs2: segment c... |
1839 1840 |
list_for_each_entry_safe(ii, n, &sci->sc_dirty_files, i_dirty) { if (!test_and_clear_bit(NILFS_I_UPDATED, &ii->i_state) || |
6c43f4100 nilfs2: keep zero... |
1841 |
test_bit(NILFS_I_DIRTY, &ii->i_state)) |
9ff05123e nilfs2: segment c... |
1842 |
continue; |
6c43f4100 nilfs2: keep zero... |
1843 |
|
9ff05123e nilfs2: segment c... |
1844 1845 1846 |
clear_bit(NILFS_I_BUSY, &ii->i_state); brelse(ii->i_bh); ii->i_bh = NULL; |
eaae0f37d nilfs2: merge lis... |
1847 |
list_move_tail(&ii->i_dirty, &ti->ti_garbage); |
9ff05123e nilfs2: segment c... |
1848 |
} |
693dd3212 nilfs2: move s_in... |
1849 |
spin_unlock(&nilfs->ns_inode_lock); |
9ff05123e nilfs2: segment c... |
1850 1851 1852 |
} /* |
9ff05123e nilfs2: segment c... |
1853 1854 1855 1856 |
* Main procedure of segment constructor */ static int nilfs_segctor_do_construct(struct nilfs_sc_info *sci, int mode) { |
e3154e974 nilfs2: get rid o... |
1857 |
struct the_nilfs *nilfs = sci->sc_super->s_fs_info; |
1e2b68bf2 nilfs2: move poin... |
1858 |
int err; |
9ff05123e nilfs2: segment c... |
1859 1860 |
sci->sc_stage.scnt = NILFS_ST_INIT; |
6c43f4100 nilfs2: keep zero... |
1861 |
sci->sc_cno = nilfs->ns_cno; |
9ff05123e nilfs2: segment c... |
1862 |
|
693dd3212 nilfs2: move s_in... |
1863 |
err = nilfs_segctor_collect_dirty_files(sci, nilfs); |
9ff05123e nilfs2: segment c... |
1864 1865 |
if (unlikely(err)) goto out; |
e912a5b66 nilfs2: use root ... |
1866 |
if (nilfs_test_metadata_dirty(nilfs, sci->sc_root)) |
9ff05123e nilfs2: segment c... |
1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 |
set_bit(NILFS_SC_DIRTY, &sci->sc_flags); if (nilfs_segctor_clean(sci)) goto out; do { sci->sc_stage.flags &= ~NILFS_CF_HISTORY_MASK; err = nilfs_segctor_begin_construction(sci, nilfs); if (unlikely(err)) goto out; /* Update time stamp */ sci->sc_seg_ctime = get_seconds(); err = nilfs_segctor_collect(sci, nilfs, mode); if (unlikely(err)) goto failed; |
9ff05123e nilfs2: segment c... |
1885 1886 |
/* Avoid empty segment */ if (sci->sc_stage.scnt == NILFS_ST_DONE && |
4762077c7 nilfs2: get rid o... |
1887 |
nilfs_segbuf_empty(sci->sc_curseg)) { |
a694291a6 nilfs2: separate ... |
1888 |
nilfs_segctor_abort_construction(sci, nilfs, 1); |
9ff05123e nilfs2: segment c... |
1889 1890 1891 1892 1893 1894 |
goto out; } err = nilfs_segctor_assign(sci, mode); if (unlikely(err)) goto failed; |
9ff05123e nilfs2: segment c... |
1895 |
if (sci->sc_stage.flags & NILFS_CF_IFILE_STARTED) |
e912a5b66 nilfs2: use root ... |
1896 |
nilfs_segctor_fill_in_file_bmap(sci); |
9ff05123e nilfs2: segment c... |
1897 |
|
1e2b68bf2 nilfs2: move poin... |
1898 1899 |
if (mode == SC_LSEG_SR && sci->sc_stage.scnt >= NILFS_ST_CPFILE) { |
9ff05123e nilfs2: segment c... |
1900 1901 |
err = nilfs_segctor_fill_in_checkpoint(sci); if (unlikely(err)) |
a694291a6 nilfs2: separate ... |
1902 |
goto failed_to_write; |
9ff05123e nilfs2: segment c... |
1903 1904 1905 1906 1907 1908 |
nilfs_segctor_fill_in_super_root(sci, nilfs); } nilfs_segctor_update_segusage(sci, nilfs->ns_sufile); /* Write partial segments */ |
1cb2d38cb nilfs2: get rid o... |
1909 |
nilfs_segctor_prepare_write(sci); |
aaed1d5bf nilfs2: move out ... |
1910 1911 1912 |
nilfs_add_checksums_on_logs(&sci->sc_segbufs, nilfs->ns_crc_seed); |
9ff05123e nilfs2: segment c... |
1913 |
|
9c965bac1 nilfs2: hide nilf... |
1914 |
err = nilfs_segctor_write(sci, nilfs); |
9ff05123e nilfs2: segment c... |
1915 1916 |
if (unlikely(err)) goto failed_to_write; |
a694291a6 nilfs2: separate ... |
1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 |
if (sci->sc_stage.scnt == NILFS_ST_DONE || nilfs->ns_blocksize_bits != PAGE_CACHE_SHIFT) { /* * At this point, we avoid double buffering * for blocksize < pagesize because page dirty * flag is turned off during write and dirty * buffers are not properly collected for * pages crossing over segments. */ err = nilfs_segctor_wait(sci); if (err) goto failed_to_write; } |
9ff05123e nilfs2: segment c... |
1930 |
} while (sci->sc_stage.scnt != NILFS_ST_DONE); |
9ff05123e nilfs2: segment c... |
1931 |
out: |
693dd3212 nilfs2: move s_in... |
1932 |
nilfs_segctor_drop_written_files(sci, nilfs); |
9ff05123e nilfs2: segment c... |
1933 1934 1935 |
return err; failed_to_write: |
9ff05123e nilfs2: segment c... |
1936 1937 |
if (sci->sc_stage.flags & NILFS_CF_IFILE_STARTED) nilfs_redirty_inodes(&sci->sc_dirty_files); |
9ff05123e nilfs2: segment c... |
1938 1939 1940 1941 |
failed: if (nilfs_doing_gc()) nilfs_redirty_inodes(&sci->sc_gc_inodes); |
a694291a6 nilfs2: separate ... |
1942 |
nilfs_segctor_abort_construction(sci, nilfs, err); |
9ff05123e nilfs2: segment c... |
1943 1944 1945 1946 |
goto out; } /** |
9ccf56c13 nilfs2: fix funct... |
1947 |
* nilfs_segctor_start_timer - set timer of background write |
9ff05123e nilfs2: segment c... |
1948 1949 1950 1951 1952 1953 1954 1955 1956 |
* @sci: nilfs_sc_info * * If the timer has already been set, it ignores the new request. * This function MUST be called within a section locking the segment * semaphore. */ static void nilfs_segctor_start_timer(struct nilfs_sc_info *sci) { spin_lock(&sci->sc_state_lock); |
fdce895ea nilfs2: change sc... |
1957 1958 1959 |
if (!(sci->sc_state & NILFS_SEGCTOR_COMMIT)) { sci->sc_timer.expires = jiffies + sci->sc_interval; add_timer(&sci->sc_timer); |
9ff05123e nilfs2: segment c... |
1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 |
sci->sc_state |= NILFS_SEGCTOR_COMMIT; } spin_unlock(&sci->sc_state_lock); } static void nilfs_segctor_do_flush(struct nilfs_sc_info *sci, int bn) { spin_lock(&sci->sc_state_lock); if (!(sci->sc_flush_request & (1 << bn))) { unsigned long prev_req = sci->sc_flush_request; sci->sc_flush_request |= (1 << bn); if (!prev_req) wake_up(&sci->sc_wait_daemon); } spin_unlock(&sci->sc_state_lock); } /** * nilfs_flush_segment - trigger a segment construction for resource control * @sb: super block * @ino: inode number of the file to be flushed out. */ void nilfs_flush_segment(struct super_block *sb, ino_t ino) { |
e3154e974 nilfs2: get rid o... |
1985 |
struct the_nilfs *nilfs = sb->s_fs_info; |
3fd3fe5ae nilfs2: move log ... |
1986 |
struct nilfs_sc_info *sci = nilfs->ns_writer; |
9ff05123e nilfs2: segment c... |
1987 1988 1989 1990 1991 1992 |
if (!sci || nilfs_doing_construction()) return; nilfs_segctor_do_flush(sci, NILFS_MDT_INODE(sb, ino) ? ino : 0); /* assign bit 0 to data files */ } |
9ff05123e nilfs2: segment c... |
1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 |
struct nilfs_segctor_wait_request { wait_queue_t wq; __u32 seq; int err; atomic_t done; }; static int nilfs_segctor_sync(struct nilfs_sc_info *sci) { struct nilfs_segctor_wait_request wait_req; int err = 0; spin_lock(&sci->sc_state_lock); init_wait(&wait_req.wq); wait_req.err = 0; atomic_set(&wait_req.done, 0); wait_req.seq = ++sci->sc_seq_request; spin_unlock(&sci->sc_state_lock); init_waitqueue_entry(&wait_req.wq, current); add_wait_queue(&sci->sc_wait_request, &wait_req.wq); set_current_state(TASK_INTERRUPTIBLE); wake_up(&sci->sc_wait_daemon); for (;;) { if (atomic_read(&wait_req.done)) { err = wait_req.err; break; } if (!signal_pending(current)) { schedule(); continue; } err = -ERESTARTSYS; break; } finish_wait(&sci->sc_wait_request, &wait_req.wq); return err; } static void nilfs_segctor_wakeup(struct nilfs_sc_info *sci, int err) { struct nilfs_segctor_wait_request *wrq, *n; unsigned long flags; spin_lock_irqsave(&sci->sc_wait_request.lock, flags); list_for_each_entry_safe(wrq, n, &sci->sc_wait_request.task_list, wq.task_list) { if (!atomic_read(&wrq->done) && nilfs_cnt32_ge(sci->sc_seq_done, wrq->seq)) { wrq->err = err; atomic_set(&wrq->done, 1); } if (atomic_read(&wrq->done)) { wrq->wq.func(&wrq->wq, TASK_UNINTERRUPTIBLE | TASK_INTERRUPTIBLE, 0, NULL); } } spin_unlock_irqrestore(&sci->sc_wait_request.lock, flags); } /** * nilfs_construct_segment - construct a logical segment * @sb: super block * * Return Value: On success, 0 is retured. On errors, one of the following * negative error code is returned. * * %-EROFS - Read only filesystem. * * %-EIO - I/O error * * %-ENOSPC - No space left on device (only in a panic state). * * %-ERESTARTSYS - Interrupted. * * %-ENOMEM - Insufficient memory available. */ int nilfs_construct_segment(struct super_block *sb) { |
e3154e974 nilfs2: get rid o... |
2074 |
struct the_nilfs *nilfs = sb->s_fs_info; |
3fd3fe5ae nilfs2: move log ... |
2075 |
struct nilfs_sc_info *sci = nilfs->ns_writer; |
9ff05123e nilfs2: segment c... |
2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 |
struct nilfs_transaction_info *ti; int err; if (!sci) return -EROFS; /* A call inside transactions causes a deadlock. */ BUG_ON((ti = current->journal_info) && ti->ti_magic == NILFS_TI_MAGIC); err = nilfs_segctor_sync(sci); return err; } /** * nilfs_construct_dsync_segment - construct a data-only logical segment * @sb: super block |
f30bf3e40 nilfs2: fix misse... |
2092 2093 2094 |
* @inode: inode whose data blocks should be written out * @start: start byte offset * @end: end byte offset (inclusive) |
9ff05123e nilfs2: segment c... |
2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 |
* * Return Value: On success, 0 is retured. On errors, one of the following * negative error code is returned. * * %-EROFS - Read only filesystem. * * %-EIO - I/O error * * %-ENOSPC - No space left on device (only in a panic state). * * %-ERESTARTSYS - Interrupted. * * %-ENOMEM - Insufficient memory available. */ |
f30bf3e40 nilfs2: fix misse... |
2109 2110 |
int nilfs_construct_dsync_segment(struct super_block *sb, struct inode *inode, loff_t start, loff_t end) |
9ff05123e nilfs2: segment c... |
2111 |
{ |
e3154e974 nilfs2: get rid o... |
2112 |
struct the_nilfs *nilfs = sb->s_fs_info; |
3fd3fe5ae nilfs2: move log ... |
2113 |
struct nilfs_sc_info *sci = nilfs->ns_writer; |
9ff05123e nilfs2: segment c... |
2114 2115 2116 2117 2118 2119 |
struct nilfs_inode_info *ii; struct nilfs_transaction_info ti; int err = 0; if (!sci) return -EROFS; |
f7545144c nilfs2: use sb in... |
2120 |
nilfs_transaction_lock(sb, &ti, 0); |
9ff05123e nilfs2: segment c... |
2121 2122 2123 |
ii = NILFS_I(inode); if (test_bit(NILFS_I_INODE_DIRTY, &ii->i_state) || |
3b2ce58b0 nilfs2: move moun... |
2124 |
nilfs_test_opt(nilfs, STRICT_ORDER) || |
9ff05123e nilfs2: segment c... |
2125 |
test_bit(NILFS_SC_UNCLOSED, &sci->sc_flags) || |
3b2ce58b0 nilfs2: move moun... |
2126 |
nilfs_discontinued(nilfs)) { |
f7545144c nilfs2: use sb in... |
2127 |
nilfs_transaction_unlock(sb); |
9ff05123e nilfs2: segment c... |
2128 2129 2130 |
err = nilfs_segctor_sync(sci); return err; } |
693dd3212 nilfs2: move s_in... |
2131 |
spin_lock(&nilfs->ns_inode_lock); |
9ff05123e nilfs2: segment c... |
2132 2133 |
if (!test_bit(NILFS_I_QUEUED, &ii->i_state) && !test_bit(NILFS_I_BUSY, &ii->i_state)) { |
693dd3212 nilfs2: move s_in... |
2134 |
spin_unlock(&nilfs->ns_inode_lock); |
f7545144c nilfs2: use sb in... |
2135 |
nilfs_transaction_unlock(sb); |
9ff05123e nilfs2: segment c... |
2136 2137 |
return 0; } |
693dd3212 nilfs2: move s_in... |
2138 |
spin_unlock(&nilfs->ns_inode_lock); |
f30bf3e40 nilfs2: fix misse... |
2139 2140 2141 |
sci->sc_dsync_inode = ii; sci->sc_dsync_start = start; sci->sc_dsync_end = end; |
9ff05123e nilfs2: segment c... |
2142 2143 |
err = nilfs_segctor_do_construct(sci, SC_LSEG_DSYNC); |
f7545144c nilfs2: use sb in... |
2144 |
nilfs_transaction_unlock(sb); |
9ff05123e nilfs2: segment c... |
2145 2146 |
return err; } |
9ff05123e nilfs2: segment c... |
2147 2148 |
#define FLUSH_FILE_BIT (0x1) /* data file only */ #define FLUSH_DAT_BIT (1 << NILFS_DAT_INO) /* DAT only */ |
dcd761869 nilfs2: get rid o... |
2149 2150 2151 2152 2153 |
/** * nilfs_segctor_accept - record accepted sequence count of log-write requests * @sci: segment constructor object */ static void nilfs_segctor_accept(struct nilfs_sc_info *sci) |
9ff05123e nilfs2: segment c... |
2154 |
{ |
9ff05123e nilfs2: segment c... |
2155 |
spin_lock(&sci->sc_state_lock); |
dcd761869 nilfs2: get rid o... |
2156 |
sci->sc_seq_accepted = sci->sc_seq_request; |
9ff05123e nilfs2: segment c... |
2157 |
spin_unlock(&sci->sc_state_lock); |
fdce895ea nilfs2: change sc... |
2158 |
del_timer_sync(&sci->sc_timer); |
9ff05123e nilfs2: segment c... |
2159 |
} |
dcd761869 nilfs2: get rid o... |
2160 2161 2162 2163 2164 2165 2166 |
/** * nilfs_segctor_notify - notify the result of request to caller threads * @sci: segment constructor object * @mode: mode of log forming * @err: error code to be notified */ static void nilfs_segctor_notify(struct nilfs_sc_info *sci, int mode, int err) |
9ff05123e nilfs2: segment c... |
2167 2168 2169 |
{ /* Clear requests (even when the construction failed) */ spin_lock(&sci->sc_state_lock); |
dcd761869 nilfs2: get rid o... |
2170 |
if (mode == SC_LSEG_SR) { |
aeda7f634 nilfs2: fix irreg... |
2171 |
sci->sc_state &= ~NILFS_SEGCTOR_COMMIT; |
dcd761869 nilfs2: get rid o... |
2172 2173 |
sci->sc_seq_done = sci->sc_seq_accepted; nilfs_segctor_wakeup(sci, err); |
9ff05123e nilfs2: segment c... |
2174 |
sci->sc_flush_request = 0; |
aeda7f634 nilfs2: fix irreg... |
2175 |
} else { |
dcd761869 nilfs2: get rid o... |
2176 |
if (mode == SC_FLUSH_FILE) |
aeda7f634 nilfs2: fix irreg... |
2177 |
sci->sc_flush_request &= ~FLUSH_FILE_BIT; |
dcd761869 nilfs2: get rid o... |
2178 |
else if (mode == SC_FLUSH_DAT) |
aeda7f634 nilfs2: fix irreg... |
2179 2180 2181 |
sci->sc_flush_request &= ~FLUSH_DAT_BIT; /* re-enable timer if checkpoint creation was not done */ |
fdce895ea nilfs2: change sc... |
2182 2183 2184 |
if ((sci->sc_state & NILFS_SEGCTOR_COMMIT) && time_before(jiffies, sci->sc_timer.expires)) add_timer(&sci->sc_timer); |
aeda7f634 nilfs2: fix irreg... |
2185 |
} |
9ff05123e nilfs2: segment c... |
2186 2187 |
spin_unlock(&sci->sc_state_lock); } |
dcd761869 nilfs2: get rid o... |
2188 2189 2190 2191 2192 2193 |
/** * nilfs_segctor_construct - form logs and write them to disk * @sci: segment constructor object * @mode: mode of log forming */ static int nilfs_segctor_construct(struct nilfs_sc_info *sci, int mode) |
9ff05123e nilfs2: segment c... |
2194 |
{ |
e3154e974 nilfs2: get rid o... |
2195 |
struct the_nilfs *nilfs = sci->sc_super->s_fs_info; |
d26493b6f nilfs2: introduce... |
2196 |
struct nilfs_super_block **sbp; |
9ff05123e nilfs2: segment c... |
2197 |
int err = 0; |
dcd761869 nilfs2: get rid o... |
2198 |
nilfs_segctor_accept(sci); |
9ff05123e nilfs2: segment c... |
2199 |
if (nilfs_discontinued(nilfs)) |
dcd761869 nilfs2: get rid o... |
2200 2201 2202 |
mode = SC_LSEG_SR; if (!nilfs_segctor_confirm(sci)) err = nilfs_segctor_do_construct(sci, mode); |
9ff05123e nilfs2: segment c... |
2203 |
if (likely(!err)) { |
dcd761869 nilfs2: get rid o... |
2204 |
if (mode != SC_FLUSH_DAT) |
9ff05123e nilfs2: segment c... |
2205 2206 2207 2208 |
atomic_set(&nilfs->ns_ndirtyblks, 0); if (test_bit(NILFS_SC_SUPER_ROOT, &sci->sc_flags) && nilfs_discontinued(nilfs)) { down_write(&nilfs->ns_sem); |
d26493b6f nilfs2: introduce... |
2209 |
err = -EIO; |
f7545144c nilfs2: use sb in... |
2210 |
sbp = nilfs_prepare_super(sci->sc_super, |
b2ac86e1a nilfs2: sync supe... |
2211 2212 2213 |
nilfs_sb_will_flip(nilfs)); if (likely(sbp)) { nilfs_set_log_cursor(sbp[0], nilfs); |
f7545144c nilfs2: use sb in... |
2214 2215 |
err = nilfs_commit_super(sci->sc_super, NILFS_SB_COMMIT); |
b2ac86e1a nilfs2: sync supe... |
2216 |
} |
9ff05123e nilfs2: segment c... |
2217 2218 2219 |
up_write(&nilfs->ns_sem); } } |
dcd761869 nilfs2: get rid o... |
2220 2221 |
nilfs_segctor_notify(sci, mode, err); |
9ff05123e nilfs2: segment c... |
2222 2223 2224 2225 2226 2227 2228 2229 2230 2231 2232 2233 2234 2235 2236 2237 2238 |
return err; } static void nilfs_construction_timeout(unsigned long data) { struct task_struct *p = (struct task_struct *)data; wake_up_process(p); } static void nilfs_remove_written_gcinodes(struct the_nilfs *nilfs, struct list_head *head) { struct nilfs_inode_info *ii, *n; list_for_each_entry_safe(ii, n, head, i_dirty) { if (!test_bit(NILFS_I_UPDATED, &ii->i_state)) continue; |
9ff05123e nilfs2: segment c... |
2239 |
list_del_init(&ii->i_dirty); |
263d90cef nilfs2: remove ow... |
2240 |
iput(&ii->vfs_inode); |
9ff05123e nilfs2: segment c... |
2241 2242 |
} } |
4f6b82883 nilfs2: fix lock ... |
2243 2244 |
int nilfs_clean_segments(struct super_block *sb, struct nilfs_argv *argv, void **kbufs) |
9ff05123e nilfs2: segment c... |
2245 |
{ |
e3154e974 nilfs2: get rid o... |
2246 |
struct the_nilfs *nilfs = sb->s_fs_info; |
3fd3fe5ae nilfs2: move log ... |
2247 |
struct nilfs_sc_info *sci = nilfs->ns_writer; |
9ff05123e nilfs2: segment c... |
2248 |
struct nilfs_transaction_info ti; |
9ff05123e nilfs2: segment c... |
2249 2250 2251 2252 |
int err; if (unlikely(!sci)) return -EROFS; |
f7545144c nilfs2: use sb in... |
2253 |
nilfs_transaction_lock(sb, &ti, 1); |
9ff05123e nilfs2: segment c... |
2254 |
|
c1c1d7092 nilfs2: get rid o... |
2255 |
err = nilfs_mdt_save_to_shadow_map(nilfs->ns_dat); |
9ff05123e nilfs2: segment c... |
2256 2257 |
if (unlikely(err)) goto out_unlock; |
071cb4b81 nilfs2: eliminate... |
2258 |
|
4f6b82883 nilfs2: fix lock ... |
2259 |
err = nilfs_ioctl_prepare_clean_segments(nilfs, argv, kbufs); |
c1c1d7092 nilfs2: get rid o... |
2260 2261 |
if (unlikely(err)) { nilfs_mdt_restore_from_shadow_map(nilfs->ns_dat); |
9ff05123e nilfs2: segment c... |
2262 |
goto out_unlock; |
c1c1d7092 nilfs2: get rid o... |
2263 |
} |
9ff05123e nilfs2: segment c... |
2264 |
|
071cb4b81 nilfs2: eliminate... |
2265 2266 |
sci->sc_freesegs = kbufs[4]; sci->sc_nfreesegs = argv[4].v_nmembs; |
0935db747 nilfs2: use list_... |
2267 |
list_splice_tail_init(&nilfs->ns_gc_inodes, &sci->sc_gc_inodes); |
9ff05123e nilfs2: segment c... |
2268 2269 |
for (;;) { |
dcd761869 nilfs2: get rid o... |
2270 |
err = nilfs_segctor_construct(sci, SC_LSEG_SR); |
9ff05123e nilfs2: segment c... |
2271 |
nilfs_remove_written_gcinodes(nilfs, &sci->sc_gc_inodes); |
9ff05123e nilfs2: segment c... |
2272 2273 2274 2275 2276 2277 2278 2279 2280 |
if (likely(!err)) break; nilfs_warning(sb, __func__, "segment construction failed. (err=%d)", err); set_current_state(TASK_INTERRUPTIBLE); schedule_timeout(sci->sc_interval); } |
3b2ce58b0 nilfs2: move moun... |
2281 |
if (nilfs_test_opt(nilfs, DISCARD)) { |
e902ec990 nilfs2: issue dis... |
2282 2283 2284 2285 2286 2287 2288 |
int ret = nilfs_discard_segments(nilfs, sci->sc_freesegs, sci->sc_nfreesegs); if (ret) { printk(KERN_WARNING "NILFS warning: error %d on discard request, " "turning discards off for the device ", ret); |
3b2ce58b0 nilfs2: move moun... |
2289 |
nilfs_clear_opt(nilfs, DISCARD); |
e902ec990 nilfs2: issue dis... |
2290 2291 |
} } |
9ff05123e nilfs2: segment c... |
2292 2293 |
out_unlock: |
071cb4b81 nilfs2: eliminate... |
2294 2295 |
sci->sc_freesegs = NULL; sci->sc_nfreesegs = 0; |
c1c1d7092 nilfs2: get rid o... |
2296 |
nilfs_mdt_clear_shadow_map(nilfs->ns_dat); |
f7545144c nilfs2: use sb in... |
2297 |
nilfs_transaction_unlock(sb); |
9ff05123e nilfs2: segment c... |
2298 2299 2300 2301 2302 |
return err; } static void nilfs_segctor_thread_construct(struct nilfs_sc_info *sci, int mode) { |
9ff05123e nilfs2: segment c... |
2303 |
struct nilfs_transaction_info ti; |
9ff05123e nilfs2: segment c... |
2304 |
|
f7545144c nilfs2: use sb in... |
2305 |
nilfs_transaction_lock(sci->sc_super, &ti, 0); |
dcd761869 nilfs2: get rid o... |
2306 |
nilfs_segctor_construct(sci, mode); |
9ff05123e nilfs2: segment c... |
2307 2308 2309 2310 2311 2312 2313 2314 |
/* * Unclosed segment should be retried. We do this using sc_timer. * Timeout of sc_timer will invoke complete construction which leads * to close the current logical segment. */ if (test_bit(NILFS_SC_UNCLOSED, &sci->sc_flags)) nilfs_segctor_start_timer(sci); |
f7545144c nilfs2: use sb in... |
2315 |
nilfs_transaction_unlock(sci->sc_super); |
9ff05123e nilfs2: segment c... |
2316 2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331 2332 2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 2345 2346 2347 2348 2349 2350 2351 2352 2353 2354 2355 2356 2357 2358 2359 2360 |
} static void nilfs_segctor_do_immediate_flush(struct nilfs_sc_info *sci) { int mode = 0; int err; spin_lock(&sci->sc_state_lock); mode = (sci->sc_flush_request & FLUSH_DAT_BIT) ? SC_FLUSH_DAT : SC_FLUSH_FILE; spin_unlock(&sci->sc_state_lock); if (mode) { err = nilfs_segctor_do_construct(sci, mode); spin_lock(&sci->sc_state_lock); sci->sc_flush_request &= (mode == SC_FLUSH_FILE) ? ~FLUSH_FILE_BIT : ~FLUSH_DAT_BIT; spin_unlock(&sci->sc_state_lock); } clear_bit(NILFS_SC_PRIOR_FLUSH, &sci->sc_flags); } static int nilfs_segctor_flush_mode(struct nilfs_sc_info *sci) { if (!test_bit(NILFS_SC_UNCLOSED, &sci->sc_flags) || time_before(jiffies, sci->sc_lseg_stime + sci->sc_mjcp_freq)) { if (!(sci->sc_flush_request & ~FLUSH_FILE_BIT)) return SC_FLUSH_FILE; else if (!(sci->sc_flush_request & ~FLUSH_DAT_BIT)) return SC_FLUSH_DAT; } return SC_LSEG_SR; } /** * nilfs_segctor_thread - main loop of the segment constructor thread. * @arg: pointer to a struct nilfs_sc_info. * * nilfs_segctor_thread() initializes a timer and serves as a daemon * to execute segment constructions. */ static int nilfs_segctor_thread(void *arg) { struct nilfs_sc_info *sci = (struct nilfs_sc_info *)arg; |
e3154e974 nilfs2: get rid o... |
2361 |
struct the_nilfs *nilfs = sci->sc_super->s_fs_info; |
9ff05123e nilfs2: segment c... |
2362 |
int timeout = 0; |
fdce895ea nilfs2: change sc... |
2363 2364 |
sci->sc_timer.data = (unsigned long)current; sci->sc_timer.function = nilfs_construction_timeout; |
9ff05123e nilfs2: segment c... |
2365 2366 2367 2368 2369 2370 2371 2372 2373 2374 2375 2376 2377 2378 2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394 2395 2396 2397 2398 |
/* start sync. */ sci->sc_task = current; wake_up(&sci->sc_wait_task); /* for nilfs_segctor_start_thread() */ printk(KERN_INFO "segctord starting. Construction interval = %lu seconds, " "CP frequency < %lu seconds ", sci->sc_interval / HZ, sci->sc_mjcp_freq / HZ); spin_lock(&sci->sc_state_lock); loop: for (;;) { int mode; if (sci->sc_state & NILFS_SEGCTOR_QUIT) goto end_thread; if (timeout || sci->sc_seq_request != sci->sc_seq_done) mode = SC_LSEG_SR; else if (!sci->sc_flush_request) break; else mode = nilfs_segctor_flush_mode(sci); spin_unlock(&sci->sc_state_lock); nilfs_segctor_thread_construct(sci, mode); spin_lock(&sci->sc_state_lock); timeout = 0; } if (freezing(current)) { spin_unlock(&sci->sc_state_lock); |
a0acae0e8 freezer: unexport... |
2399 |
try_to_freeze(); |
9ff05123e nilfs2: segment c... |
2400 2401 2402 2403 2404 2405 2406 2407 2408 2409 2410 2411 2412 2413 |
spin_lock(&sci->sc_state_lock); } else { DEFINE_WAIT(wait); int should_sleep = 1; prepare_to_wait(&sci->sc_wait_daemon, &wait, TASK_INTERRUPTIBLE); if (sci->sc_seq_request != sci->sc_seq_done) should_sleep = 0; else if (sci->sc_flush_request) should_sleep = 0; else if (sci->sc_state & NILFS_SEGCTOR_COMMIT) should_sleep = time_before(jiffies, |
fdce895ea nilfs2: change sc... |
2414 |
sci->sc_timer.expires); |
9ff05123e nilfs2: segment c... |
2415 2416 2417 2418 2419 2420 2421 2422 |
if (should_sleep) { spin_unlock(&sci->sc_state_lock); schedule(); spin_lock(&sci->sc_state_lock); } finish_wait(&sci->sc_wait_daemon, &wait); timeout = ((sci->sc_state & NILFS_SEGCTOR_COMMIT) && |
fdce895ea nilfs2: change sc... |
2423 |
time_after_eq(jiffies, sci->sc_timer.expires)); |
e605f0a72 nilfs2: get rid o... |
2424 2425 |
if (nilfs_sb_dirty(nilfs) && nilfs_sb_need_update(nilfs)) |
1dfa27105 nilfs2: stop usin... |
2426 |
set_nilfs_discontinued(nilfs); |
9ff05123e nilfs2: segment c... |
2427 2428 2429 2430 2431 |
} goto loop; end_thread: spin_unlock(&sci->sc_state_lock); |
9ff05123e nilfs2: segment c... |
2432 2433 2434 2435 2436 2437 2438 2439 2440 2441 2442 2443 2444 2445 2446 2447 2448 2449 2450 2451 2452 2453 2454 2455 2456 |
/* end sync. */ sci->sc_task = NULL; wake_up(&sci->sc_wait_task); /* for nilfs_segctor_kill_thread() */ return 0; } static int nilfs_segctor_start_thread(struct nilfs_sc_info *sci) { struct task_struct *t; t = kthread_run(nilfs_segctor_thread, sci, "segctord"); if (IS_ERR(t)) { int err = PTR_ERR(t); printk(KERN_ERR "NILFS: error %d creating segctord thread ", err); return err; } wait_event(sci->sc_wait_task, sci->sc_task != NULL); return 0; } static void nilfs_segctor_kill_thread(struct nilfs_sc_info *sci) |
6b81e14e6 nilfs2: eliminate... |
2457 2458 |
__acquires(&sci->sc_state_lock) __releases(&sci->sc_state_lock) |
9ff05123e nilfs2: segment c... |
2459 2460 2461 2462 2463 2464 2465 2466 2467 2468 |
{ sci->sc_state |= NILFS_SEGCTOR_QUIT; while (sci->sc_task) { wake_up(&sci->sc_wait_daemon); spin_unlock(&sci->sc_state_lock); wait_event(sci->sc_wait_task, sci->sc_task == NULL); spin_lock(&sci->sc_state_lock); } } |
9ff05123e nilfs2: segment c... |
2469 2470 2471 |
/* * Setup & clean-up functions */ |
f7545144c nilfs2: use sb in... |
2472 |
static struct nilfs_sc_info *nilfs_segctor_new(struct super_block *sb, |
e912a5b66 nilfs2: use root ... |
2473 |
struct nilfs_root *root) |
9ff05123e nilfs2: segment c... |
2474 |
{ |
e3154e974 nilfs2: get rid o... |
2475 |
struct the_nilfs *nilfs = sb->s_fs_info; |
9ff05123e nilfs2: segment c... |
2476 2477 2478 2479 2480 |
struct nilfs_sc_info *sci; sci = kzalloc(sizeof(*sci), GFP_KERNEL); if (!sci) return NULL; |
f7545144c nilfs2: use sb in... |
2481 |
sci->sc_super = sb; |
9ff05123e nilfs2: segment c... |
2482 |
|
e912a5b66 nilfs2: use root ... |
2483 2484 |
nilfs_get_root(root); sci->sc_root = root; |
9ff05123e nilfs2: segment c... |
2485 2486 2487 2488 2489 2490 |
init_waitqueue_head(&sci->sc_wait_request); init_waitqueue_head(&sci->sc_wait_daemon); init_waitqueue_head(&sci->sc_wait_task); spin_lock_init(&sci->sc_state_lock); INIT_LIST_HEAD(&sci->sc_dirty_files); INIT_LIST_HEAD(&sci->sc_segbufs); |
a694291a6 nilfs2: separate ... |
2491 |
INIT_LIST_HEAD(&sci->sc_write_logs); |
9ff05123e nilfs2: segment c... |
2492 |
INIT_LIST_HEAD(&sci->sc_gc_inodes); |
fdce895ea nilfs2: change sc... |
2493 |
init_timer(&sci->sc_timer); |
9ff05123e nilfs2: segment c... |
2494 2495 2496 2497 |
sci->sc_interval = HZ * NILFS_SC_DEFAULT_TIMEOUT; sci->sc_mjcp_freq = HZ * NILFS_SC_DEFAULT_SR_FREQ; sci->sc_watermark = NILFS_SC_DEFAULT_WATERMARK; |
574e6c314 nilfs2: move para... |
2498 |
if (nilfs->ns_interval) |
071d73cfe nilfs2: fix probl... |
2499 |
sci->sc_interval = HZ * nilfs->ns_interval; |
574e6c314 nilfs2: move para... |
2500 2501 |
if (nilfs->ns_watermark) sci->sc_watermark = nilfs->ns_watermark; |
9ff05123e nilfs2: segment c... |
2502 2503 2504 2505 2506 2507 2508 2509 2510 2511 |
return sci; } static void nilfs_segctor_write_out(struct nilfs_sc_info *sci) { int ret, retrycount = NILFS_SC_CLEANUP_RETRY; /* The segctord thread was stopped and its timer was removed. But some tasks remain. */ do { |
9ff05123e nilfs2: segment c... |
2512 |
struct nilfs_transaction_info ti; |
9ff05123e nilfs2: segment c... |
2513 |
|
f7545144c nilfs2: use sb in... |
2514 |
nilfs_transaction_lock(sci->sc_super, &ti, 0); |
dcd761869 nilfs2: get rid o... |
2515 |
ret = nilfs_segctor_construct(sci, SC_LSEG_SR); |
f7545144c nilfs2: use sb in... |
2516 |
nilfs_transaction_unlock(sci->sc_super); |
9ff05123e nilfs2: segment c... |
2517 2518 2519 2520 2521 2522 2523 2524 2525 2526 2527 2528 2529 2530 |
} while (ret && retrycount-- > 0); } /** * nilfs_segctor_destroy - destroy the segment constructor. * @sci: nilfs_sc_info * * nilfs_segctor_destroy() kills the segctord thread and frees * the nilfs_sc_info struct. * Caller must hold the segment semaphore. */ static void nilfs_segctor_destroy(struct nilfs_sc_info *sci) { |
e3154e974 nilfs2: get rid o... |
2531 |
struct the_nilfs *nilfs = sci->sc_super->s_fs_info; |
9ff05123e nilfs2: segment c... |
2532 |
int flag; |
693dd3212 nilfs2: move s_in... |
2533 |
up_write(&nilfs->ns_segctor_sem); |
9ff05123e nilfs2: segment c... |
2534 2535 2536 2537 2538 2539 |
spin_lock(&sci->sc_state_lock); nilfs_segctor_kill_thread(sci); flag = ((sci->sc_state & NILFS_SEGCTOR_COMMIT) || sci->sc_flush_request || sci->sc_seq_request != sci->sc_seq_done); spin_unlock(&sci->sc_state_lock); |
3256a0553 nilfs2: fix poten... |
2540 |
if (flag || !nilfs_segctor_confirm(sci)) |
9ff05123e nilfs2: segment c... |
2541 |
nilfs_segctor_write_out(sci); |
9ff05123e nilfs2: segment c... |
2542 |
if (!list_empty(&sci->sc_dirty_files)) { |
693dd3212 nilfs2: move s_in... |
2543 |
nilfs_warning(sci->sc_super, __func__, |
9ff05123e nilfs2: segment c... |
2544 2545 |
"dirty file(s) after the final construction "); |
693dd3212 nilfs2: move s_in... |
2546 |
nilfs_dispose_list(nilfs, &sci->sc_dirty_files, 1); |
9ff05123e nilfs2: segment c... |
2547 |
} |
9ff05123e nilfs2: segment c... |
2548 |
|
1f5abe7e7 nilfs2: replace B... |
2549 |
WARN_ON(!list_empty(&sci->sc_segbufs)); |
a694291a6 nilfs2: separate ... |
2550 |
WARN_ON(!list_empty(&sci->sc_write_logs)); |
9ff05123e nilfs2: segment c... |
2551 |
|
e912a5b66 nilfs2: use root ... |
2552 |
nilfs_put_root(sci->sc_root); |
693dd3212 nilfs2: move s_in... |
2553 |
down_write(&nilfs->ns_segctor_sem); |
9ff05123e nilfs2: segment c... |
2554 |
|
fdce895ea nilfs2: change sc... |
2555 |
del_timer_sync(&sci->sc_timer); |
9ff05123e nilfs2: segment c... |
2556 2557 2558 2559 |
kfree(sci); } /** |
f7545144c nilfs2: use sb in... |
2560 2561 |
* nilfs_attach_log_writer - attach log writer * @sb: super block instance |
e912a5b66 nilfs2: use root ... |
2562 |
* @root: root object of the current filesystem tree |
9ff05123e nilfs2: segment c... |
2563 |
* |
f7545144c nilfs2: use sb in... |
2564 2565 |
* This allocates a log writer object, initializes it, and starts the * log writer. |
9ff05123e nilfs2: segment c... |
2566 2567 2568 2569 2570 2571 |
* * Return Value: On success, 0 is returned. On error, one of the following * negative error code is returned. * * %-ENOMEM - Insufficient memory available. */ |
f7545144c nilfs2: use sb in... |
2572 |
int nilfs_attach_log_writer(struct super_block *sb, struct nilfs_root *root) |
9ff05123e nilfs2: segment c... |
2573 |
{ |
e3154e974 nilfs2: get rid o... |
2574 |
struct the_nilfs *nilfs = sb->s_fs_info; |
9ff05123e nilfs2: segment c... |
2575 |
int err; |
3fd3fe5ae nilfs2: move log ... |
2576 |
if (nilfs->ns_writer) { |
fe5f171bb nilfs2: fix poten... |
2577 2578 2579 2580 2581 |
/* * This happens if the filesystem was remounted * read/write after nilfs_error degenerated it into a * read-only mount. */ |
f7545144c nilfs2: use sb in... |
2582 |
nilfs_detach_log_writer(sb); |
fe5f171bb nilfs2: fix poten... |
2583 |
} |
f7545144c nilfs2: use sb in... |
2584 |
nilfs->ns_writer = nilfs_segctor_new(sb, root); |
3fd3fe5ae nilfs2: move log ... |
2585 |
if (!nilfs->ns_writer) |
9ff05123e nilfs2: segment c... |
2586 |
return -ENOMEM; |
3fd3fe5ae nilfs2: move log ... |
2587 |
err = nilfs_segctor_start_thread(nilfs->ns_writer); |
9ff05123e nilfs2: segment c... |
2588 |
if (err) { |
3fd3fe5ae nilfs2: move log ... |
2589 2590 |
kfree(nilfs->ns_writer); nilfs->ns_writer = NULL; |
9ff05123e nilfs2: segment c... |
2591 2592 2593 2594 2595 |
} return err; } /** |
f7545144c nilfs2: use sb in... |
2596 2597 |
* nilfs_detach_log_writer - destroy log writer * @sb: super block instance |
9ff05123e nilfs2: segment c... |
2598 |
* |
f7545144c nilfs2: use sb in... |
2599 2600 |
* This kills log writer daemon, frees the log writer object, and * destroys list of dirty files. |
9ff05123e nilfs2: segment c... |
2601 |
*/ |
f7545144c nilfs2: use sb in... |
2602 |
void nilfs_detach_log_writer(struct super_block *sb) |
9ff05123e nilfs2: segment c... |
2603 |
{ |
e3154e974 nilfs2: get rid o... |
2604 |
struct the_nilfs *nilfs = sb->s_fs_info; |
9ff05123e nilfs2: segment c... |
2605 2606 2607 |
LIST_HEAD(garbage_list); down_write(&nilfs->ns_segctor_sem); |
3fd3fe5ae nilfs2: move log ... |
2608 2609 2610 |
if (nilfs->ns_writer) { nilfs_segctor_destroy(nilfs->ns_writer); nilfs->ns_writer = NULL; |
9ff05123e nilfs2: segment c... |
2611 2612 2613 |
} /* Force to free the list of dirty files */ |
693dd3212 nilfs2: move s_in... |
2614 2615 2616 |
spin_lock(&nilfs->ns_inode_lock); if (!list_empty(&nilfs->ns_dirty_files)) { list_splice_init(&nilfs->ns_dirty_files, &garbage_list); |
f7545144c nilfs2: use sb in... |
2617 2618 2619 |
nilfs_warning(sb, __func__, "Hit dirty file after stopped log writer "); |
9ff05123e nilfs2: segment c... |
2620 |
} |
693dd3212 nilfs2: move s_in... |
2621 |
spin_unlock(&nilfs->ns_inode_lock); |
9ff05123e nilfs2: segment c... |
2622 |
up_write(&nilfs->ns_segctor_sem); |
693dd3212 nilfs2: move s_in... |
2623 |
nilfs_dispose_list(nilfs, &garbage_list, 1); |
9ff05123e nilfs2: segment c... |
2624 |
} |