diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2010-05-21 18:47:00 +0400 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-05-21 18:47:00 +0400 |
commit | d7dbf4ffee1c7a17e2e5b5f01efe76fbd1671db6 (patch) | |
tree | 2f4eda25c0c9eb6de1e573dba92b4d23fc383db5 /fs | |
parent | 677abe49ad017679627af9d3bbd9a7ecb3d94c42 (diff) | |
parent | d240e06713007bba309b074a386b7072b73c31a6 (diff) | |
download | linux-d7dbf4ffee1c7a17e2e5b5f01efe76fbd1671db6.tar.xz |
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ryusuke/nilfs2
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ryusuke/nilfs2: (23 commits)
nilfs2: disallow remount of snapshot from/to a regular mount
nilfs2: use huge_encode_dev/huge_decode_dev
nilfs2: update comment on deactivate_super at nilfs_get_sb
nilfs2: replace MS_VERBOSE with MS_SILENT
nilfs2: add missing initialization of s_mode
nilfs2: fix misuse of open_bdev_exclusive/close_bdev_exclusive
nilfs2: enlarge s_volume_name member in nilfs_super_block
nilfs2: use checkpoint number instead of timestamp to select super block
nilfs2: add missing endian conversion on super block magic number
nilfs2: make nilfs_sc_*_ops static
nilfs2: add kernel doc comments to persistent object allocator functions
nilfs2: change sc_timer from a pointer to an embedded one in struct nilfs_sc_info
nilfs2: remove nilfs_segctor_init() in segment.c
nilfs2: insert checkpoint number in segment summary header
nilfs2: add a print message after loading nilfs2
nilfs2: cleanup multi kmem_cache_{create,destroy} code
nilfs2: move out checksum routines to segment buffer code
nilfs2: move pointer to super root block into logs
nilfs2: change default of 'errors' mount option to 'remount-ro' mode
nilfs2: Combine nilfs_btree_release_path() and nilfs_btree_free_path()
...
Diffstat (limited to 'fs')
-rw-r--r-- | fs/nilfs2/alloc.c | 154 | ||||
-rw-r--r-- | fs/nilfs2/alloc.h | 7 | ||||
-rw-r--r-- | fs/nilfs2/btree.c | 91 | ||||
-rw-r--r-- | fs/nilfs2/btree.h | 23 | ||||
-rw-r--r-- | fs/nilfs2/inode.c | 4 | ||||
-rw-r--r-- | fs/nilfs2/recovery.c | 2 | ||||
-rw-r--r-- | fs/nilfs2/segbuf.c | 70 | ||||
-rw-r--r-- | fs/nilfs2/segbuf.h | 10 | ||||
-rw-r--r-- | fs/nilfs2/segment.c | 157 | ||||
-rw-r--r-- | fs/nilfs2/segment.h | 6 | ||||
-rw-r--r-- | fs/nilfs2/super.c | 218 | ||||
-rw-r--r-- | fs/nilfs2/the_nilfs.c | 10 |
12 files changed, 412 insertions, 340 deletions
diff --git a/fs/nilfs2/alloc.c b/fs/nilfs2/alloc.c index 7cfb87e692da..d7fd696e595c 100644 --- a/fs/nilfs2/alloc.c +++ b/fs/nilfs2/alloc.c @@ -31,6 +31,11 @@ #include "alloc.h" +/** + * nilfs_palloc_groups_per_desc_block - get the number of groups that a group + * descriptor block can maintain + * @inode: inode of metadata file using this allocator + */ static inline unsigned long nilfs_palloc_groups_per_desc_block(const struct inode *inode) { @@ -38,12 +43,21 @@ nilfs_palloc_groups_per_desc_block(const struct inode *inode) sizeof(struct nilfs_palloc_group_desc); } +/** + * nilfs_palloc_groups_count - get maximum number of groups + * @inode: inode of metadata file using this allocator + */ static inline unsigned long nilfs_palloc_groups_count(const struct inode *inode) { return 1UL << (BITS_PER_LONG - (inode->i_blkbits + 3 /* log2(8) */)); } +/** + * nilfs_palloc_init_blockgroup - initialize private variables for allocator + * @inode: inode of metadata file using this allocator + * @entry_size: size of the persistent object + */ int nilfs_palloc_init_blockgroup(struct inode *inode, unsigned entry_size) { struct nilfs_mdt_info *mi = NILFS_MDT(inode); @@ -69,6 +83,12 @@ int nilfs_palloc_init_blockgroup(struct inode *inode, unsigned entry_size) return 0; } +/** + * nilfs_palloc_group - get group number and offset from an entry number + * @inode: inode of metadata file using this allocator + * @nr: serial number of the entry (e.g. inode number) + * @offset: pointer to store offset number in the group + */ static unsigned long nilfs_palloc_group(const struct inode *inode, __u64 nr, unsigned long *offset) { @@ -78,6 +98,14 @@ static unsigned long nilfs_palloc_group(const struct inode *inode, __u64 nr, return group; } +/** + * nilfs_palloc_desc_blkoff - get block offset of a group descriptor block + * @inode: inode of metadata file using this allocator + * @group: group number + * + * nilfs_palloc_desc_blkoff() returns block offset of the descriptor + * block which contains a descriptor of the specified group. + */ static unsigned long nilfs_palloc_desc_blkoff(const struct inode *inode, unsigned long group) { @@ -86,6 +114,14 @@ nilfs_palloc_desc_blkoff(const struct inode *inode, unsigned long group) return desc_block * NILFS_MDT(inode)->mi_blocks_per_desc_block; } +/** + * nilfs_palloc_bitmap_blkoff - get block offset of a bitmap block + * @inode: inode of metadata file using this allocator + * @group: group number + * + * nilfs_palloc_bitmap_blkoff() returns block offset of the bitmap + * block used to allocate/deallocate entries in the specified group. + */ static unsigned long nilfs_palloc_bitmap_blkoff(const struct inode *inode, unsigned long group) { @@ -95,6 +131,12 @@ nilfs_palloc_bitmap_blkoff(const struct inode *inode, unsigned long group) desc_offset * NILFS_MDT(inode)->mi_blocks_per_group; } +/** + * nilfs_palloc_group_desc_nfrees - get the number of free entries in a group + * @inode: inode of metadata file using this allocator + * @group: group number + * @desc: pointer to descriptor structure for the group + */ static unsigned long nilfs_palloc_group_desc_nfrees(struct inode *inode, unsigned long group, const struct nilfs_palloc_group_desc *desc) @@ -107,6 +149,13 @@ nilfs_palloc_group_desc_nfrees(struct inode *inode, unsigned long group, return nfree; } +/** + * nilfs_palloc_group_desc_add_entries - adjust count of free entries + * @inode: inode of metadata file using this allocator + * @group: group number + * @desc: pointer to descriptor structure for the group + * @n: delta to be added + */ static void nilfs_palloc_group_desc_add_entries(struct inode *inode, unsigned long group, @@ -118,6 +167,11 @@ nilfs_palloc_group_desc_add_entries(struct inode *inode, spin_unlock(nilfs_mdt_bgl_lock(inode, group)); } +/** + * nilfs_palloc_entry_blkoff - get block offset of an entry block + * @inode: inode of metadata file using this allocator + * @nr: serial number of the entry (e.g. inode number) + */ static unsigned long nilfs_palloc_entry_blkoff(const struct inode *inode, __u64 nr) { @@ -129,6 +183,12 @@ nilfs_palloc_entry_blkoff(const struct inode *inode, __u64 nr) group_offset / NILFS_MDT(inode)->mi_entries_per_block; } +/** + * nilfs_palloc_desc_block_init - initialize buffer of a group descriptor block + * @inode: inode of metadata file + * @bh: buffer head of the buffer to be initialized + * @kaddr: kernel address mapped for the page including the buffer + */ static void nilfs_palloc_desc_block_init(struct inode *inode, struct buffer_head *bh, void *kaddr) { @@ -179,6 +239,13 @@ static int nilfs_palloc_get_block(struct inode *inode, unsigned long blkoff, return ret; } +/** + * nilfs_palloc_get_desc_block - get buffer head of a group descriptor block + * @inode: inode of metadata file using this allocator + * @group: group number + * @create: create flag + * @bhp: pointer to store the resultant buffer head + */ static int nilfs_palloc_get_desc_block(struct inode *inode, unsigned long group, int create, struct buffer_head **bhp) @@ -191,6 +258,13 @@ static int nilfs_palloc_get_desc_block(struct inode *inode, bhp, &cache->prev_desc, &cache->lock); } +/** + * nilfs_palloc_get_bitmap_block - get buffer head of a bitmap block + * @inode: inode of metadata file using this allocator + * @group: group number + * @create: create flag + * @bhp: pointer to store the resultant buffer head + */ static int nilfs_palloc_get_bitmap_block(struct inode *inode, unsigned long group, int create, struct buffer_head **bhp) @@ -203,6 +277,13 @@ static int nilfs_palloc_get_bitmap_block(struct inode *inode, &cache->prev_bitmap, &cache->lock); } +/** + * nilfs_palloc_get_entry_block - get buffer head of an entry block + * @inode: inode of metadata file using this allocator + * @nr: serial number of the entry (e.g. inode number) + * @create: create flag + * @bhp: pointer to store the resultant buffer head + */ int nilfs_palloc_get_entry_block(struct inode *inode, __u64 nr, int create, struct buffer_head **bhp) { @@ -214,6 +295,13 @@ int nilfs_palloc_get_entry_block(struct inode *inode, __u64 nr, &cache->prev_entry, &cache->lock); } +/** + * nilfs_palloc_block_get_group_desc - get kernel address of a group descriptor + * @inode: inode of metadata file using this allocator + * @group: group number + * @bh: buffer head of the buffer storing the group descriptor block + * @kaddr: kernel address mapped for the page including the buffer + */ static struct nilfs_palloc_group_desc * nilfs_palloc_block_get_group_desc(const struct inode *inode, unsigned long group, @@ -223,6 +311,13 @@ nilfs_palloc_block_get_group_desc(const struct inode *inode, group % nilfs_palloc_groups_per_desc_block(inode); } +/** + * nilfs_palloc_block_get_entry - get kernel address of an entry + * @inode: inode of metadata file using this allocator + * @nr: serial number of the entry (e.g. inode number) + * @bh: buffer head of the buffer storing the entry block + * @kaddr: kernel address mapped for the page including the buffer + */ void *nilfs_palloc_block_get_entry(const struct inode *inode, __u64 nr, const struct buffer_head *bh, void *kaddr) { @@ -235,11 +330,19 @@ void *nilfs_palloc_block_get_entry(const struct inode *inode, __u64 nr, entry_offset * NILFS_MDT(inode)->mi_entry_size; } +/** + * nilfs_palloc_find_available_slot - find available slot in a group + * @inode: inode of metadata file using this allocator + * @group: group number + * @target: offset number of an entry in the group (start point) + * @bitmap: bitmap of the group + * @bsize: size in bits + */ static int nilfs_palloc_find_available_slot(struct inode *inode, unsigned long group, unsigned long target, unsigned char *bitmap, - int bsize) /* size in bits */ + int bsize) { int curr, pos, end, i; @@ -277,6 +380,13 @@ static int nilfs_palloc_find_available_slot(struct inode *inode, return -ENOSPC; } +/** + * nilfs_palloc_rest_groups_in_desc_block - get the remaining number of groups + * in a group descriptor block + * @inode: inode of metadata file using this allocator + * @curr: current group number + * @max: maximum number of groups + */ static unsigned long nilfs_palloc_rest_groups_in_desc_block(const struct inode *inode, unsigned long curr, unsigned long max) @@ -287,6 +397,11 @@ nilfs_palloc_rest_groups_in_desc_block(const struct inode *inode, max - curr + 1); } +/** + * nilfs_palloc_prepare_alloc_entry - prepare to allocate a persistent object + * @inode: inode of metadata file using this allocator + * @req: nilfs_palloc_req structure exchanged for the allocation + */ int nilfs_palloc_prepare_alloc_entry(struct inode *inode, struct nilfs_palloc_req *req) { @@ -366,6 +481,11 @@ int nilfs_palloc_prepare_alloc_entry(struct inode *inode, return ret; } +/** + * nilfs_palloc_commit_alloc_entry - finish allocation of a persistent object + * @inode: inode of metadata file using this allocator + * @req: nilfs_palloc_req structure exchanged for the allocation + */ void nilfs_palloc_commit_alloc_entry(struct inode *inode, struct nilfs_palloc_req *req) { @@ -377,6 +497,11 @@ void nilfs_palloc_commit_alloc_entry(struct inode *inode, brelse(req->pr_desc_bh); } +/** + * nilfs_palloc_commit_free_entry - finish deallocating a persistent object + * @inode: inode of metadata file using this allocator + * @req: nilfs_palloc_req structure exchanged for the removal + */ void nilfs_palloc_commit_free_entry(struct inode *inode, struct nilfs_palloc_req *req) { @@ -410,6 +535,11 @@ void nilfs_palloc_commit_free_entry(struct inode *inode, brelse(req->pr_desc_bh); } +/** + * nilfs_palloc_abort_alloc_entry - cancel allocation of a persistent object + * @inode: inode of metadata file using this allocator + * @req: nilfs_palloc_req structure exchanged for the allocation + */ void nilfs_palloc_abort_alloc_entry(struct inode *inode, struct nilfs_palloc_req *req) { @@ -442,6 +572,11 @@ void nilfs_palloc_abort_alloc_entry(struct inode *inode, req->pr_desc_bh = NULL; } +/** + * nilfs_palloc_prepare_free_entry - prepare to deallocate a persistent object + * @inode: inode of metadata file using this allocator + * @req: nilfs_palloc_req structure exchanged for the removal + */ int nilfs_palloc_prepare_free_entry(struct inode *inode, struct nilfs_palloc_req *req) { @@ -464,6 +599,11 @@ int nilfs_palloc_prepare_free_entry(struct inode *inode, return 0; } +/** + * nilfs_palloc_abort_free_entry - cancel deallocating a persistent object + * @inode: inode of metadata file using this allocator + * @req: nilfs_palloc_req structure exchanged for the removal + */ void nilfs_palloc_abort_free_entry(struct inode *inode, struct nilfs_palloc_req *req) { @@ -475,6 +615,12 @@ void nilfs_palloc_abort_free_entry(struct inode *inode, req->pr_desc_bh = NULL; } +/** + * nilfs_palloc_group_is_in - judge if an entry is in a group + * @inode: inode of metadata file using this allocator + * @group: group number + * @nr: serial number of the entry (e.g. inode number) + */ static int nilfs_palloc_group_is_in(struct inode *inode, unsigned long group, __u64 nr) { @@ -485,6 +631,12 @@ nilfs_palloc_group_is_in(struct inode *inode, unsigned long group, __u64 nr) return (nr >= first) && (nr <= last); } +/** + * nilfs_palloc_freev - deallocate a set of persistent objects + * @inode: inode of metadata file using this allocator + * @entry_nrs: array of entry numbers to be deallocated + * @nitems: number of entries stored in @entry_nrs + */ int nilfs_palloc_freev(struct inode *inode, __u64 *entry_nrs, size_t nitems) { struct buffer_head *desc_bh, *bitmap_bh; diff --git a/fs/nilfs2/alloc.h b/fs/nilfs2/alloc.h index 5cccf874d692..9af34a7e6e13 100644 --- a/fs/nilfs2/alloc.h +++ b/fs/nilfs2/alloc.h @@ -29,6 +29,13 @@ #include <linux/buffer_head.h> #include <linux/fs.h> +/** + * nilfs_palloc_entries_per_group - get the number of entries per group + * @inode: inode of metadata file using this allocator + * + * The number of entries per group is defined by the number of bits + * that a bitmap block can maintain. + */ static inline unsigned long nilfs_palloc_entries_per_group(const struct inode *inode) { diff --git a/fs/nilfs2/btree.c b/fs/nilfs2/btree.c index 76c38e3e19d2..b27a342c5af6 100644 --- a/fs/nilfs2/btree.c +++ b/fs/nilfs2/btree.c @@ -31,63 +31,16 @@ #include "alloc.h" #include "dat.h" -/** - * struct nilfs_btree_path - A path on which B-tree operations are executed - * @bp_bh: buffer head of node block - * @bp_sib_bh: buffer head of sibling node block - * @bp_index: index of child node - * @bp_oldreq: ptr end request for old ptr - * @bp_newreq: ptr alloc request for new ptr - * @bp_op: rebalance operation - */ -struct nilfs_btree_path { - struct buffer_head *bp_bh; - struct buffer_head *bp_sib_bh; - int bp_index; - union nilfs_bmap_ptr_req bp_oldreq; - union nilfs_bmap_ptr_req bp_newreq; - struct nilfs_btnode_chkey_ctxt bp_ctxt; - void (*bp_op)(struct nilfs_btree *, struct nilfs_btree_path *, - int, __u64 *, __u64 *); -}; - -/* - * B-tree path operations - */ - -static struct kmem_cache *nilfs_btree_path_cache; - -int __init nilfs_btree_path_cache_init(void) -{ - nilfs_btree_path_cache = - kmem_cache_create("nilfs2_btree_path_cache", - sizeof(struct nilfs_btree_path) * - NILFS_BTREE_LEVEL_MAX, 0, 0, NULL); - return (nilfs_btree_path_cache != NULL) ? 0 : -ENOMEM; -} - -void nilfs_btree_path_cache_destroy(void) -{ - kmem_cache_destroy(nilfs_btree_path_cache); -} - -static inline struct nilfs_btree_path *nilfs_btree_alloc_path(void) -{ - return kmem_cache_alloc(nilfs_btree_path_cache, GFP_NOFS); -} - -static inline void nilfs_btree_free_path(struct nilfs_btree_path *path) +static struct nilfs_btree_path *nilfs_btree_alloc_path(void) { - kmem_cache_free(nilfs_btree_path_cache, path); -} + struct nilfs_btree_path *path; + int level = NILFS_BTREE_LEVEL_DATA; -static void nilfs_btree_init_path(struct nilfs_btree_path *path) -{ - int level; + path = kmem_cache_alloc(nilfs_btree_path_cache, GFP_NOFS); + if (path == NULL) + goto out; - for (level = NILFS_BTREE_LEVEL_DATA; - level < NILFS_BTREE_LEVEL_MAX; - level++) { + for (; level < NILFS_BTREE_LEVEL_MAX; level++) { path[level].bp_bh = NULL; path[level].bp_sib_bh = NULL; path[level].bp_index = 0; @@ -95,15 +48,19 @@ static void nilfs_btree_init_path(struct nilfs_btree_path *path) path[level].bp_newreq.bpr_ptr = NILFS_BMAP_INVALID_PTR; path[level].bp_op = NULL; } + +out: + return path; } -static void nilfs_btree_release_path(struct nilfs_btree_path *path) +static void nilfs_btree_free_path(struct nilfs_btree_path *path) { - int level; + int level = NILFS_BTREE_LEVEL_DATA; - for (level = NILFS_BTREE_LEVEL_DATA; level < NILFS_BTREE_LEVEL_MAX; - level++) + for (; level < NILFS_BTREE_LEVEL_MAX; level++) brelse(path[level].bp_bh); + + kmem_cache_free(nilfs_btree_path_cache, path); } /* @@ -566,14 +523,12 @@ static int nilfs_btree_lookup(const struct nilfs_bmap *bmap, path = nilfs_btree_alloc_path(); if (path == NULL) return -ENOMEM; - nilfs_btree_init_path(path); ret = nilfs_btree_do_lookup(btree, path, key, &ptr, level); if (ptrp != NULL) *ptrp = ptr; - nilfs_btree_release_path(path); nilfs_btree_free_path(path); return ret; @@ -594,7 +549,7 @@ static int nilfs_btree_lookup_contig(const struct nilfs_bmap *bmap, path = nilfs_btree_alloc_path(); if (path == NULL) return -ENOMEM; - nilfs_btree_init_path(path); + ret = nilfs_btree_do_lookup(btree, path, key, &ptr, level); if (ret < 0) goto out; @@ -655,7 +610,6 @@ static int nilfs_btree_lookup_contig(const struct nilfs_bmap *bmap, *ptrp = ptr; ret = cnt; out: - nilfs_btree_release_path(path); nilfs_btree_free_path(path); return ret; } @@ -1123,7 +1077,6 @@ static int nilfs_btree_insert(struct nilfs_bmap *bmap, __u64 key, __u64 ptr) path = nilfs_btree_alloc_path(); if (path == NULL) return -ENOMEM; - nilfs_btree_init_path(path); ret = nilfs_btree_do_lookup(btree, path, key, NULL, NILFS_BTREE_LEVEL_NODE_MIN); @@ -1140,7 +1093,6 @@ static int nilfs_btree_insert(struct nilfs_bmap *bmap, __u64 key, __u64 ptr) nilfs_bmap_add_blocks(bmap, stats.bs_nblocks); out: - nilfs_btree_release_path(path); nilfs_btree_free_path(path); return ret; } @@ -1456,7 +1408,7 @@ static int nilfs_btree_delete(struct nilfs_bmap *bmap, __u64 key) path = nilfs_btree_alloc_path(); if (path == NULL) return -ENOMEM; - nilfs_btree_init_path(path); + ret = nilfs_btree_do_lookup(btree, path, key, NULL, NILFS_BTREE_LEVEL_NODE_MIN); if (ret < 0) @@ -1473,7 +1425,6 @@ static int nilfs_btree_delete(struct nilfs_bmap *bmap, __u64 key) nilfs_bmap_sub_blocks(bmap, stats.bs_nblocks); out: - nilfs_btree_release_path(path); nilfs_btree_free_path(path); return ret; } @@ -1488,11 +1439,9 @@ static int nilfs_btree_last_key(const struct nilfs_bmap *bmap, __u64 *keyp) path = nilfs_btree_alloc_path(); if (path == NULL) return -ENOMEM; - nilfs_btree_init_path(path); ret = nilfs_btree_do_lookup_last(btree, path, keyp, NULL); - nilfs_btree_release_path(path); nilfs_btree_free_path(path); return ret; @@ -1923,7 +1872,6 @@ static int nilfs_btree_propagate(const struct nilfs_bmap *bmap, path = nilfs_btree_alloc_path(); if (path == NULL) return -ENOMEM; - nilfs_btree_init_path(path); if (buffer_nilfs_node(bh)) { node = (struct nilfs_btree_node *)bh->b_data; @@ -1947,7 +1895,6 @@ static int nilfs_btree_propagate(const struct nilfs_bmap *bmap, nilfs_btree_propagate_p(btree, path, level, bh); out: - nilfs_btree_release_path(path); nilfs_btree_free_path(path); return ret; @@ -2108,7 +2055,6 @@ static int nilfs_btree_assign(struct nilfs_bmap *bmap, path = nilfs_btree_alloc_path(); if (path == NULL) return -ENOMEM; - nilfs_btree_init_path(path); if (buffer_nilfs_node(*bh)) { node = (struct nilfs_btree_node *)(*bh)->b_data; @@ -2130,7 +2076,6 @@ static int nilfs_btree_assign(struct nilfs_bmap *bmap, nilfs_btree_assign_p(btree, path, level, bh, blocknr, binfo); out: - nilfs_btree_release_path(path); nilfs_btree_free_path(path); return ret; @@ -2175,7 +2120,6 @@ static int nilfs_btree_mark(struct nilfs_bmap *bmap, __u64 key, int level) path = nilfs_btree_alloc_path(); if (path == NULL) return -ENOMEM; - nilfs_btree_init_path(path); ret = nilfs_btree_do_lookup(btree, path, key, &ptr, level + 1); if (ret < 0) { @@ -2195,7 +2139,6 @@ static int nilfs_btree_mark(struct nilfs_bmap *bmap, __u64 key, int level) nilfs_bmap_set_dirty(&btree->bt_bmap); out: - nilfs_btree_release_path(path); nilfs_btree_free_path(path); return ret; } diff --git a/fs/nilfs2/btree.h b/fs/nilfs2/btree.h index 4b82d84ade75..af638d59e3bf 100644 --- a/fs/nilfs2/btree.h +++ b/fs/nilfs2/btree.h @@ -30,9 +30,6 @@ #include "btnode.h" #include "bmap.h" -struct nilfs_btree; -struct nilfs_btree_path; - /** * struct nilfs_btree - B-tree structure * @bt_bmap: bmap base structure @@ -41,6 +38,25 @@ struct nilfs_btree { struct nilfs_bmap bt_bmap; }; +/** + * struct nilfs_btree_path - A path on which B-tree operations are executed + * @bp_bh: buffer head of node block + * @bp_sib_bh: buffer head of sibling node block + * @bp_index: index of child node + * @bp_oldreq: ptr end request for old ptr + * @bp_newreq: ptr alloc request for new ptr + * @bp_op: rebalance operation + */ +struct nilfs_btree_path { + struct buffer_head *bp_bh; + struct buffer_head *bp_sib_bh; + int bp_index; + union nilfs_bmap_ptr_req bp_oldreq; + union nilfs_bmap_ptr_req bp_newreq; + struct nilfs_btnode_chkey_ctxt bp_ctxt; + void (*bp_op)(struct nilfs_btree *, struct nilfs_btree_path *, + int, __u64 *, __u64 *); +}; #define NILFS_BTREE_ROOT_SIZE NILFS_BMAP_SIZE #define NILFS_BTREE_ROOT_NCHILDREN_MAX \ @@ -57,6 +73,7 @@ struct nilfs_btree { #define NILFS_BTREE_KEY_MIN ((__u64)0) #define NILFS_BTREE_KEY_MAX (~(__u64)0) +extern struct kmem_cache *nilfs_btree_path_cache; int nilfs_btree_path_cache_init(void); void nilfs_btree_path_cache_destroy(void); diff --git a/fs/nilfs2/inode.c b/fs/nilfs2/inode.c index 0957b58f909d..5e226d4b41d3 100644 --- a/fs/nilfs2/inode.c +++ b/fs/nilfs2/inode.c @@ -451,7 +451,7 @@ static int __nilfs_read_inode(struct super_block *sb, unsigned long ino, inode->i_op = &nilfs_special_inode_operations; init_special_inode( inode, inode->i_mode, - new_decode_dev(le64_to_cpu(raw_inode->i_device_code))); + huge_decode_dev(le64_to_cpu(raw_inode->i_device_code))); } nilfs_ifile_unmap_inode(sbi->s_ifile, ino, bh); brelse(bh); @@ -511,7 +511,7 @@ void nilfs_write_inode_common(struct inode *inode, nilfs_bmap_write(ii->i_bmap, raw_inode); else if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) raw_inode->i_device_code = - cpu_to_le64(new_encode_dev(inode->i_rdev)); + cpu_to_le64(huge_encode_dev(inode->i_rdev)); /* When extending inode, nilfs->ns_inode_size should be checked for substitutions of appended fields */ } diff --git a/fs/nilfs2/recovery.c b/fs/nilfs2/recovery.c index ba43146f3c30..bae2a516b4ee 100644 --- a/fs/nilfs2/recovery.c +++ b/fs/nilfs2/recovery.c @@ -105,6 +105,8 @@ static void store_segsum_info(struct nilfs_segsum_info *ssi, ssi->nsumblk = DIV_ROUND_UP(ssi->sumbytes, blocksize); ssi->nfileblk = ssi->nblocks - ssi->nsumblk - !!NILFS_SEG_HAS_SR(ssi); + + /* need to verify ->ss_bytes field if read ->ss_cno */ } /** diff --git a/fs/nilfs2/segbuf.c b/fs/nilfs2/segbuf.c index 17851f77f739..2e6a2723b8fa 100644 --- a/fs/nilfs2/segbuf.c +++ b/fs/nilfs2/segbuf.c @@ -40,35 +40,10 @@ struct nilfs_write_info { sector_t blocknr; }; - static int nilfs_segbuf_write(struct nilfs_segment_buffer *segbuf, struct the_nilfs *nilfs); static int nilfs_segbuf_wait(struct nilfs_segment_buffer *segbuf); - -static struct kmem_cache *nilfs_segbuf_cachep; - -static void nilfs_segbuf_init_once(void *obj) -{ - memset(obj, 0, sizeof(struct nilfs_segment_buffer)); -} - -int __init nilfs_init_segbuf_cache(void) -{ - nilfs_segbuf_cachep = - kmem_cache_create("nilfs2_segbuf_cache", - sizeof(struct nilfs_segment_buffer), - 0, SLAB_RECLAIM_ACCOUNT, - nilfs_segbuf_init_once); - - return (nilfs_segbuf_cachep == NULL) ? -ENOMEM : 0; -} - -void nilfs_destroy_segbuf_cache(void) -{ - kmem_cache_destroy(nilfs_segbuf_cachep); -} - struct nilfs_segment_buffer *nilfs_segbuf_new(struct super_block *sb) { struct nilfs_segment_buffer *segbuf; @@ -81,6 +56,7 @@ struct nilfs_segment_buffer *nilfs_segbuf_new(struct super_block *sb) INIT_LIST_HEAD(&segbuf->sb_list); INIT_LIST_HEAD(&segbuf->sb_segsum_buffers); INIT_LIST_HEAD(&segbuf->sb_payload_buffers); + segbuf->sb_super_root = NULL; init_completion(&segbuf->sb_bio_event); atomic_set(&segbuf->sb_err, 0); @@ -158,7 +134,7 @@ int nilfs_segbuf_extend_payload(struct nilfs_segment_buffer *segbuf, } int nilfs_segbuf_reset(struct nilfs_segment_buffer *segbuf, unsigned flags, - time_t ctime) + time_t ctime, __u64 cno) { int err; @@ -171,6 +147,7 @@ int nilfs_segbuf_reset(struct nilfs_segment_buffer *segbuf, unsigned flags, segbuf->sb_sum.sumbytes = sizeof(struct nilfs_segment_summary); segbuf->sb_sum.nfinfo = segbuf->sb_sum.nfileblk = 0; segbuf->sb_sum.ctime = ctime; + segbuf->sb_sum.cno = cno; return 0; } @@ -196,13 +173,14 @@ void nilfs_segbuf_fill_in_segsum(struct nilfs_segment_buffer *segbuf) raw_sum->ss_nfinfo = cpu_to_le32(segbuf->sb_sum.nfinfo); raw_sum->ss_sumbytes = cpu_to_le32(segbuf->sb_sum.sumbytes); raw_sum->ss_pad = 0; + raw_sum->ss_cno = cpu_to_le64(segbuf->sb_sum.cno); } /* * CRC calculation routines */ -void nilfs_segbuf_fill_in_segsum_crc(struct nilfs_segment_buffer *segbuf, - u32 seed) +static void +nilfs_segbuf_fill_in_segsum_crc(struct nilfs_segment_buffer *segbuf, u32 seed) { struct buffer_head *bh; struct nilfs_segment_summary *raw_sum; @@ -229,8 +207,8 @@ void nilfs_segbuf_fill_in_segsum_crc(struct nilfs_segment_buffer *segbuf, raw_sum->ss_sumsum = cpu_to_le32(crc); } -void nilfs_segbuf_fill_in_data_crc(struct nilfs_segment_buffer *segbuf, - u32 seed) +static void nilfs_segbuf_fill_in_data_crc(struct nilfs_segment_buffer *segbuf, + u32 seed) { struct buffer_head *bh; struct nilfs_segment_summary *raw_sum; @@ -256,6 +234,20 @@ void nilfs_segbuf_fill_in_data_crc(struct nilfs_segment_buffer *segbuf, raw_sum->ss_datasum = cpu_to_le32(crc); } +static void +nilfs_segbuf_fill_in_super_root_crc(struct nilfs_segment_buffer *segbuf, + u32 seed) +{ + struct nilfs_super_root *raw_sr; + u32 crc; + + raw_sr = (struct nilfs_super_root *)segbuf->sb_super_root->b_data; + crc = crc32_le(seed, + (unsigned char *)raw_sr + sizeof(raw_sr->sr_sum), + NILFS_SR_BYTES - sizeof(raw_sr->sr_sum)); + raw_sr->sr_sum = cpu_to_le32(crc); +} + static void nilfs_release_buffers(struct list_head *list) { struct buffer_head *bh, *n; @@ -282,6 +274,7 @@ static void nilfs_segbuf_clear(struct nilfs_segment_buffer *segbuf) { nilfs_release_buffers(&segbuf->sb_segsum_buffers); nilfs_release_buffers(&segbuf->sb_payload_buffers); + segbuf->sb_super_root = NULL; } /* @@ -334,6 +327,23 @@ int nilfs_wait_on_logs(struct list_head *logs) return ret; } +/** + * nilfs_add_checksums_on_logs - add checksums on the logs + * @logs: list of segment buffers storing target logs + * @seed: checksum seed value + */ +void nilfs_add_checksums_on_logs(struct list_head *logs, u32 seed) +{ + struct nilfs_segment_buffer *segbuf; + + list_for_each_entry(segbuf, logs, sb_list) { + if (segbuf->sb_super_root) + nilfs_segbuf_fill_in_super_root_crc(segbuf, seed); + nilfs_segbuf_fill_in_segsum_crc(segbuf, seed); + nilfs_segbuf_fill_in_data_crc(segbuf, seed); + } +} + /* * BIO operations */ diff --git a/fs/nilfs2/segbuf.h b/fs/nilfs2/segbuf.h index 94dfd3517bc0..fdf1c3b6d673 100644 --- a/fs/nilfs2/segbuf.h +++ b/fs/nilfs2/segbuf.h @@ -37,6 +37,7 @@ * @sumbytes: Byte count of segment summary * @nfileblk: Total number of file blocks * @seg_seq: Segment sequence number + * @cno: Checkpoint number * @ctime: Creation time * @next: Block number of the next full segment */ @@ -48,6 +49,7 @@ struct nilfs_segsum_info { unsigned long sumbytes; unsigned long nfileblk; u64 seg_seq; + __u64 cno; time_t ctime; sector_t next; }; @@ -76,6 +78,7 @@ struct nilfs_segsum_info { * @sb_rest_blocks: Number of residual blocks in the current segment * @sb_segsum_buffers: List of buffers for segment summaries * @sb_payload_buffers: List of buffers for segment payload + * @sb_super_root: Pointer to buffer storing a super root block (if exists) * @sb_nbio: Number of flying bio requests * @sb_err: I/O error status * @sb_bio_event: Completion event of log writing @@ -95,6 +98,7 @@ struct nilfs_segment_buffer { /* Buffers */ struct list_head sb_segsum_buffers; struct list_head sb_payload_buffers; /* including super root */ + struct buffer_head *sb_super_root; /* io status */ int sb_nbio; @@ -121,6 +125,7 @@ struct nilfs_segment_buffer { b_assoc_buffers)) #define NILFS_SEGBUF_BH_IS_LAST(bh, head) ((bh)->b_assoc_buffers.next == head) +extern struct kmem_cache *nilfs_segbuf_cachep; int __init nilfs_init_segbuf_cache(void); void nilfs_destroy_segbuf_cache(void); @@ -132,13 +137,11 @@ void nilfs_segbuf_map_cont(struct nilfs_segment_buffer *segbuf, struct nilfs_segment_buffer *prev); void nilfs_segbuf_set_next_segnum(struct nilfs_segment_buffer *, __u64, struct the_nilfs *); -int nilfs_segbuf_reset(struct nilfs_segment_buffer *, unsigned, time_t); +int nilfs_segbuf_reset(struct nilfs_segment_buffer *, unsigned, time_t, __u64); int nilfs_segbuf_extend_segsum(struct nilfs_segment_buffer *); int nilfs_segbuf_extend_payload(struct nilfs_segment_buffer *, struct buffer_head **); void nilfs_segbuf_fill_in_segsum(struct nilfs_segment_buffer *); -void nilfs_segbuf_fill_in_segsum_crc(struct nilfs_segment_buffer *, u32); -void nilfs_segbuf_fill_in_data_crc(struct nilfs_segment_buffer *, u32); static inline void nilfs_segbuf_add_segsum_buffer(struct nilfs_segment_buffer *segbuf, @@ -171,6 +174,7 @@ void nilfs_truncate_logs(struct list_head *logs, struct nilfs_segment_buffer *last); int nilfs_write_logs(struct list_head *logs, struct the_nilfs *nilfs); int nilfs_wait_on_logs(struct list_head *logs); +void nilfs_add_checksums_on_logs(struct list_head *logs, u32 seed); static inline void nilfs_destroy_logs(struct list_head *logs) { diff --git a/fs/nilfs2/segment.c b/fs/nilfs2/segment.c index 6a7dbd8451db..c9201649cc49 100644 --- a/fs/nilfs2/segment.c +++ b/fs/nilfs2/segment.c @@ -116,42 +116,6 @@ static void nilfs_dispose_list(struct nilfs_sb_info *, struct list_head *, #define nilfs_cnt32_lt(a, b) nilfs_cnt32_gt(b, a) #define nilfs_cnt32_le(a, b) nilfs_cnt32_ge(b, a) -/* - * Transaction - */ -static struct kmem_cache *nilfs_transaction_cachep; - -/** - * nilfs_init_transaction_cache - create a cache for nilfs_transaction_info - * - * nilfs_init_transaction_cache() creates a slab cache for the struct - * nilfs_transaction_info. - * - * Return Value: On success, it returns 0. On error, one of the following - * negative error code is returned. - * - * %-ENOMEM - Insufficient memory available. - */ -int nilfs_init_transaction_cache(void) -{ - nilfs_transaction_cachep = - kmem_cache_create("nilfs2_transaction_cache", - sizeof(struct nilfs_transaction_info), - 0, SLAB_RECLAIM_ACCOUNT, NULL); - return (nilfs_transaction_cachep == NULL) ? -ENOMEM : 0; -} - -/** - * nilfs_destroy_transaction_cache - destroy the cache for transaction info - * - * nilfs_destroy_transaction_cache() frees the slab cache for the struct - * nilfs_transaction_info. - */ -void nilfs_destroy_transaction_cache(void) -{ - kmem_cache_destroy(nilfs_transaction_cachep); -} - static int nilfs_prepare_segment_lock(struct nilfs_transaction_info *ti) { struct nilfs_transaction_info *cur_ti = current->journal_info; @@ -402,7 +366,8 @@ static int nilfs_segctor_reset_segment_buffer(struct nilfs_sc_info *sci) if (nilfs_doing_gc()) flags = NILFS_SS_GC; - err = nilfs_segbuf_reset(segbuf, flags, sci->sc_seg_ctime); + err = nilfs_segbuf_reset(segbuf, flags, sci->sc_seg_ctime, + sci->sc_sbi->s_nilfs->ns_cno); if (unlikely(err)) return err; @@ -435,7 +400,7 @@ static int nilfs_segctor_add_super_root(struct nilfs_sc_info *sci) return err; segbuf = sci->sc_curseg; } - err = nilfs_segbuf_extend_payload(segbuf, &sci->sc_super_root); + err = nilfs_segbuf_extend_payload(segbuf, &segbuf->sb_super_root); if (likely(!err)) segbuf->sb_sum.flags |= NILFS_SS_SR; return err; @@ -599,7 +564,7 @@ static void nilfs_write_file_node_binfo(struct nilfs_sc_info *sci, *vblocknr = binfo->bi_v.bi_vblocknr; } -struct nilfs_sc_operations nilfs_sc_file_ops = { +static struct nilfs_sc_operations nilfs_sc_file_ops = { .collect_data = nilfs_collect_file_data, .collect_node = nilfs_collect_file_node, .collect_bmap = nilfs_collect_file_bmap, @@ -649,7 +614,7 @@ static void nilfs_write_dat_node_binfo(struct nilfs_sc_info *sci, *binfo_dat = binfo->bi_dat; } -struct nilfs_sc_operations nilfs_sc_dat_ops = { +static struct nilfs_sc_operations nilfs_sc_dat_ops = { .collect_data = nilfs_collect_dat_data, .collect_node = nilfs_collect_file_node, .collect_bmap = nilfs_collect_dat_bmap, @@ -657,7 +622,7 @@ struct nilfs_sc_operations nilfs_sc_dat_ops = { .write_node_binfo = nilfs_write_dat_node_binfo, }; -struct nilfs_sc_operations nilfs_sc_dsync_ops = { +static struct nilfs_sc_operations nilfs_sc_dsync_ops = { .collect_data = nilfs_collect_file_data, .collect_node = NULL, .collect_bmap = NULL, @@ -932,43 +897,16 @@ static void nilfs_segctor_fill_in_file_bmap(struct nilfs_sc_info *sci, } } -/* - * CRC calculation routines - */ -static void nilfs_fill_in_super_root_crc(struct buffer_head *bh_sr, u32 seed) -{ - struct nilfs_super_root *raw_sr = - (struct nilfs_super_root *)bh_sr->b_data; - u32 crc; - - crc = crc32_le(seed, - (unsigned char *)raw_sr + sizeof(raw_sr->sr_sum), - NILFS_SR_BYTES - sizeof(raw_sr->sr_sum)); - raw_sr->sr_sum = cpu_to_le32(crc); -} - -static void nilfs_segctor_fill_in_checksums(struct nilfs_sc_info *sci, - u32 seed) -{ - struct nilfs_segment_buffer *segbuf; - - if (sci->sc_super_root) - nilfs_fill_in_super_root_crc(sci->sc_super_root, seed); - - list_for_each_entry(segbuf, &sci->sc_segbufs, sb_list) { - nilfs_segbuf_fill_in_segsum_crc(segbuf, seed); - nilfs_segbuf_fill_in_data_crc(segbuf, seed); - } -} - static void nilfs_segctor_fill_in_super_root(struct nilfs_sc_info *sci, struct the_nilfs *nilfs) { - struct buffer_head *bh_sr = sci->sc_super_root; - struct nilfs_super_root *raw_sr = - (struct nilfs_super_root *)bh_sr->b_data; + struct buffer_head *bh_sr; + struct nilfs_super_root *raw_sr; unsigned isz = nilfs->ns_inode_size; + bh_sr = NILFS_LAST_SEGBUF(&sci->sc_segbufs)->sb_super_root; + raw_sr = (struct nilfs_super_root *)bh_sr->b_data; + raw_sr->sr_bytes = cpu_to_le16(NILFS_SR_BYTES); raw_sr->sr_nongc_ctime = cpu_to_le64(nilfs_doing_gc() ? @@ -1491,7 +1429,6 @@ static int nilfs_segctor_collect(struct nilfs_sc_info *sci, /* Collection retry loop */ for (;;) { - sci->sc_super_root = NULL; sci->sc_nblk_this_inc = 0; sci->sc_curseg = NILFS_FIRST_SEGBUF(&sci->sc_segbufs); @@ -1568,7 +1505,7 @@ nilfs_segctor_update_payload_blocknr(struct nilfs_sc_info *sci, ssp.offset = sizeof(struct nilfs_segment_summary); list_for_each_entry(bh, &segbuf->sb_payload_buffers, b_assoc_buffers) { - if (bh == sci->sc_super_root) + if (bh == segbuf->sb_super_root) break; if (!finfo) { finfo = nilfs_segctor_map_segsum_entry( @@ -1729,7 +1666,7 @@ static int nilfs_segctor_prepare_write(struct nilfs_sc_info *sci, list_for_each_entry(bh, &segbuf->sb_payload_buffers, b_assoc_buffers) { - if (bh == sci->sc_super_root) { + if (bh == segbuf->sb_super_root) { if (bh->b_page != bd_page) { lock_page(bd_page); clear_page_dirty_for_io(bd_page); @@ -1848,7 +1785,7 @@ static void nilfs_clear_copied_buffers(struct list_head *list, int err) } static void nilfs_abort_logs(struct list_head *logs, struct page *failed_page, - struct buffer_head *bh_sr, int err) + int err) { struct nilfs_segment_buffer *segbuf; struct page *bd_page = NULL, *fs_page = NULL; @@ -1869,7 +1806,7 @@ static void nilfs_abort_logs(struct list_head *logs, struct page *failed_page, list_for_each_entry(bh, &segbuf->sb_payload_buffers, b_assoc_buffers) { - if (bh == bh_sr) { + if (bh == segbuf->sb_super_root) { if (bh->b_page != bd_page) { end_page_writeback(bd_page); bd_page = bh->b_page; @@ -1898,7 +1835,7 @@ static void nilfs_segctor_abort_construction(struct nilfs_sc_info *sci, list_splice_tail_init(&sci->sc_write_logs, &logs); ret = nilfs_wait_on_logs(&logs); - nilfs_abort_logs(&logs, NULL, sci->sc_super_root, ret ? : err); + nilfs_abort_logs(&logs, NULL, ret ? : err); list_splice_tail_init(&sci->sc_segbufs, &logs); nilfs_cancel_segusage(&logs, nilfs->ns_sufile); @@ -1914,7 +1851,6 @@ static void nilfs_segctor_abort_construction(struct nilfs_sc_info *sci, } nilfs_destroy_logs(&logs); - sci->sc_super_root = NULL; } static void nilfs_set_next_segment(struct the_nilfs *nilfs, @@ -1933,7 +1869,7 @@ static void nilfs_segctor_complete_write(struct nilfs_sc_info *sci) struct nilfs_segment_buffer *segbuf; struct page *bd_page = NULL, *fs_page = NULL; struct the_nilfs *nilfs = sci->sc_sbi->s_nilfs; - int update_sr = (sci->sc_super_root != NULL); + int update_sr = false; list_for_each_entry(segbuf, &sci->sc_write_logs, sb_list) { struct buffer_head *bh; @@ -1964,11 +1900,12 @@ static void nilfs_segctor_complete_write(struct nilfs_sc_info *sci) set_buffer_uptodate(bh); clear_buffer_dirty(bh); clear_buffer_nilfs_volatile(bh); - if (bh == sci->sc_super_root) { + if (bh == segbuf->sb_super_root) { if (bh->b_page != bd_page) { end_page_writeback(bd_page); bd_page = bh->b_page; } + update_sr = true; break; } if (bh->b_page != fs_page) { @@ -2115,7 +2052,7 @@ static int nilfs_segctor_do_construct(struct nilfs_sc_info *sci, int mode) struct nilfs_sb_info *sbi = sci->sc_sbi; struct the_nilfs *nilfs = sbi->s_nilfs; struct page *failed_page; - int err, has_sr = 0; + int err; sci->sc_stage.scnt = NILFS_ST_INIT; @@ -2143,8 +2080,6 @@ static int nilfs_segctor_do_construct(struct nilfs_sc_info *sci, int mode) if (unlikely(err)) goto failed; - has_sr = (sci->sc_super_root != NULL); - /* Avoid empty segment */ if (sci->sc_stage.scnt == NILFS_ST_DONE && NILFS_SEG_EMPTY(&sci->sc_curseg->sb_sum)) { @@ -2159,7 +2094,8 @@ static int nilfs_segctor_do_construct(struct nilfs_sc_info *sci, int mode) if (sci->sc_stage.flags & NILFS_CF_IFILE_STARTED) nilfs_segctor_fill_in_file_bmap(sci, sbi->s_ifile); - if (has_sr) { + if (mode == SC_LSEG_SR && + sci->sc_stage.scnt >= NILFS_ST_CPFILE) { err = nilfs_segctor_fill_in_checkpoint(sci); if (unlikely(err)) goto failed_to_write; @@ -2171,11 +2107,12 @@ static int nilfs_segctor_do_construct(struct nilfs_sc_info *sci, int mode) /* Write partial segments */ err = nilfs_segctor_prepare_write(sci, &failed_page); if (err) { - nilfs_abort_logs(&sci->sc_segbufs, failed_page, - sci->sc_super_root, err); + nilfs_abort_logs(&sci->sc_segbufs, failed_page, err); goto failed_to_write; } - nilfs_segctor_fill_in_checksums(sci, nilfs->ns_crc_seed); + + nilfs_add_checksums_on_logs(&sci->sc_segbufs, + nilfs->ns_crc_seed); err = nilfs_segctor_write(sci, nilfs); if (unlikely(err)) @@ -2196,8 +2133,6 @@ static int nilfs_segctor_do_construct(struct nilfs_sc_info *sci, int mode) } } while (sci->sc_stage.scnt != NILFS_ST_DONE); - sci->sc_super_root = NULL; - out: nilfs_segctor_check_out_files(sci, sbi); return err; @@ -2224,9 +2159,9 @@ static int nilfs_segctor_do_construct(struct nilfs_sc_info *sci, int mode) static void nilfs_segctor_start_timer(struct nilfs_sc_info *sci) { spin_lock(&sci->sc_state_lock); - if (sci->sc_timer && !(sci->sc_state & NILFS_SEGCTOR_COMMIT)) { - sci->sc_timer->expires = jiffies + sci->sc_interval; - add_timer(sci->sc_timer); + if (!(sci->sc_state & NILFS_SEGCTOR_COMMIT)) { + sci->sc_timer.expires = jiffies + sci->sc_interval; + add_timer(&sci->sc_timer); sci->sc_state |= NILFS_SEGCTOR_COMMIT; } spin_unlock(&sci->sc_state_lock); @@ -2431,9 +2366,7 @@ static void nilfs_segctor_accept(struct nilfs_sc_info *sci) spin_lock(&sci->sc_state_lock); sci->sc_seq_accepted = sci->sc_seq_request; spin_unlock(&sci->sc_state_lock); - - if (sci->sc_timer) - del_timer_sync(sci->sc_timer); + del_timer_sync(&sci->sc_timer); } /** @@ -2459,9 +2392,9 @@ static void nilfs_segctor_notify(struct nilfs_sc_info *sci, int mode, int err) sci->sc_flush_request &= ~FLUSH_DAT_BIT; /* re-enable timer if checkpoint creation was not done */ - if (sci->sc_timer && (sci->sc_state & NILFS_SEGCTOR_COMMIT) && - time_before(jiffies, sci->sc_timer->expires)) - add_timer(sci->sc_timer); + if ((sci->sc_state & NILFS_SEGCTOR_COMMIT) && + time_before(jiffies, sci->sc_timer.expires)) + add_timer(&sci->sc_timer); } spin_unlock(&sci->sc_state_lock); } @@ -2640,13 +2573,10 @@ static int nilfs_segctor_thread(void *arg) { struct nilfs_sc_info *sci = (struct nilfs_sc_info *)arg; struct the_nilfs *nilfs = sci->sc_sbi->s_nilfs; - struct timer_list timer; int timeout = 0; - init_timer(&timer); - timer.data = (unsigned long)current; - timer.function = nilfs_construction_timeout; - sci->sc_timer = &timer; + sci->sc_timer.data = (unsigned long)current; + sci->sc_timer.function = nilfs_construction_timeout; /* start sync. */ sci->sc_task = current; @@ -2695,7 +2625,7 @@ static int nilfs_segctor_thread(void *arg) should_sleep = 0; else if (sci->sc_state & NILFS_SEGCTOR_COMMIT) should_sleep = time_before(jiffies, - sci->sc_timer->expires); + sci->sc_timer.expires); if (should_sleep) { spin_unlock(&sci->sc_state_lock); @@ -2704,7 +2634,7 @@ static int nilfs_segctor_thread(void *arg) } finish_wait(&sci->sc_wait_daemon, &wait); timeout = ((sci->sc_state & NILFS_SEGCTOR_COMMIT) && - time_after_eq(jiffies, sci->sc_timer->expires)); + time_after_eq(jiffies, sci->sc_timer.expires)); if (nilfs_sb_dirty(nilfs) && nilfs_sb_need_update(nilfs)) set_nilfs_discontinued(nilfs); @@ -2713,8 +2643,6 @@ static int nilfs_segctor_thread(void *arg) end_thread: spin_unlock(&sci->sc_state_lock); - del_timer_sync(sci->sc_timer); - sci->sc_timer = NULL; /* end sync. */ sci->sc_task = NULL; @@ -2750,13 +2678,6 @@ static void nilfs_segctor_kill_thread(struct nilfs_sc_info *sci) } } -static int nilfs_segctor_init(struct nilfs_sc_info *sci) -{ - sci->sc_seq_done = sci->sc_seq_request; - - return nilfs_segctor_start_thread(sci); -} - /* * Setup & clean-up functions */ @@ -2780,6 +2701,7 @@ static struct nilfs_sc_info *nilfs_segctor_new(struct nilfs_sb_info *sbi) INIT_LIST_HEAD(&sci->sc_write_logs); INIT_LIST_HEAD(&sci->sc_gc_inodes); INIT_LIST_HEAD(&sci->sc_copied_buffers); + init_timer(&sci->sc_timer); sci->sc_interval = HZ * NILFS_SC_DEFAULT_TIMEOUT; sci->sc_mjcp_freq = HZ * NILFS_SC_DEFAULT_SR_FREQ; @@ -2846,6 +2768,7 @@ static void nilfs_segctor_destroy(struct nilfs_sc_info *sci) down_write(&sbi->s_nilfs->ns_segctor_sem); + del_timer_sync(&sci->sc_timer); kfree(sci); } @@ -2880,7 +2803,7 @@ int nilfs_attach_segment_constructor(struct nilfs_sb_info *sbi) return -ENOMEM; nilfs_attach_writer(nilfs, sbi); - err = nilfs_segctor_init(NILFS_SC(sbi)); + err = nilfs_segctor_start_thread(NILFS_SC(sbi)); if (err) { nilfs_detach_writer(nilfs, sbi); kfree(sbi->s_sc_info); diff --git a/fs/nilfs2/segment.h b/fs/nilfs2/segment.h index 82dfd6a686b9..dca142361ccf 100644 --- a/fs/nilfs2/segment.h +++ b/fs/nilfs2/segment.h @@ -100,7 +100,6 @@ struct nilfs_segsum_pointer { * @sc_write_logs: List of segment buffers to hold logs under writing * @sc_segbuf_nblocks: Number of available blocks in segment buffers. * @sc_curseg: Current segment buffer - * @sc_super_root: Pointer to the super root buffer * @sc_stage: Collection stage * @sc_finfo_ptr: pointer to the current finfo struct in the segment summary * @sc_binfo_ptr: pointer to the current binfo struct in the segment summary @@ -148,7 +147,6 @@ struct nilfs_sc_info { struct list_head sc_write_logs; unsigned long sc_segbuf_nblocks; struct nilfs_segment_buffer *sc_curseg; - struct buffer_head *sc_super_root; struct nilfs_cstage sc_stage; @@ -179,7 +177,7 @@ struct nilfs_sc_info { unsigned long sc_lseg_stime; /* in 1/HZ seconds */ unsigned long sc_watermark; - struct timer_list *sc_timer; + struct timer_list sc_timer; struct task_struct *sc_task; }; @@ -219,6 +217,8 @@ enum { */ #define NILFS_SC_DEFAULT_WATERMARK 3600 +/* super.c */ +extern struct kmem_cache *nilfs_transaction_cachep; /* segment.c */ extern int nilfs_init_transaction_cache(void); diff --git a/fs/nilfs2/super.c b/fs/nilfs2/super.c index 48145f505a6a..03b34b738993 100644 --- a/fs/nilfs2/super.c +++ b/fs/nilfs2/super.c @@ -67,6 +67,11 @@ MODULE_DESCRIPTION("A New Implementation of the Log-structured Filesystem " "(NILFS)"); MODULE_LICENSE("GPL"); +struct kmem_cache *nilfs_inode_cachep; +struct kmem_cache *nilfs_transaction_cachep; +struct kmem_cache *nilfs_segbuf_cachep; +struct kmem_cache *nilfs_btree_path_cache; + static int nilfs_remount(struct super_block *sb, int *flags, char *data); /** @@ -129,7 +134,6 @@ void nilfs_warning(struct super_block *sb, const char *function, va_end(args); } -static struct kmem_cache *nilfs_inode_cachep; struct inode *nilfs_alloc_inode_common(struct the_nilfs *nilfs) { @@ -155,34 +159,6 @@ void nilfs_destroy_inode(struct inode *inode) kmem_cache_free(nilfs_inode_cachep, NILFS_I(inode)); } -static void init_once(void *obj) -{ - struct nilfs_inode_info *ii = obj; - - INIT_LIST_HEAD(&ii->i_dirty); -#ifdef CONFIG_NILFS_XATTR - init_rwsem(&ii->xattr_sem); -#endif - nilfs_btnode_cache_init_once(&ii->i_btnode_cache); - ii->i_bmap = (struct nilfs_bmap *)&ii->i_bmap_union; - inode_init_once(&ii->vfs_inode); -} - -static int nilfs_init_inode_cache(void) -{ - nilfs_inode_cachep = kmem_cache_create("nilfs2_inode_cache", - sizeof(struct nilfs_inode_info), - 0, SLAB_RECLAIM_ACCOUNT, - init_once); - - return (nilfs_inode_cachep == NULL) ? -ENOMEM : 0; -} - -static inline void nilfs_destroy_inode_cache(void) -{ - kmem_cache_destroy(nilfs_inode_cachep); -} - static void nilfs_clear_inode(struct inode *inode) { struct nilfs_inode_info *ii = NILFS_I(inode); @@ -266,8 +242,8 @@ int nilfs_commit_super(struct nilfs_sb_info *sbi, int dupsb) int err; /* nilfs->sem must be locked by the caller. */ - if (sbp[0]->s_magic != NILFS_SUPER_MAGIC) { - if (sbp[1] && sbp[1]->s_magic == NILFS_SUPER_MAGIC) + if (sbp[0]->s_magic != cpu_to_le16(NILFS_SUPER_MAGIC)) { + if (sbp[1] && sbp[1]->s_magic == cpu_to_le16(NILFS_SUPER_MAGIC)) nilfs_swap_super_block(nilfs); else { printk(KERN_CRIT "NILFS: superblock broke on dev %s\n", @@ -470,10 +446,10 @@ static int nilfs_show_options(struct seq_file *seq, struct vfsmount *vfs) if (nilfs_test_opt(sbi, SNAPSHOT)) seq_printf(seq, ",cp=%llu", (unsigned long long int)sbi->s_snapshot_cno); - if (nilfs_test_opt(sbi, ERRORS_RO)) - seq_printf(seq, ",errors=remount-ro"); if (nilfs_test_opt(sbi, ERRORS_PANIC)) seq_printf(seq, ",errors=panic"); + if (nilfs_test_opt(sbi, ERRORS_CONT)) + seq_printf(seq, ",errors=continue"); if (nilfs_test_opt(sbi, STRICT_ORDER)) seq_printf(seq, ",order=strict"); if (nilfs_test_opt(sbi, NORECOVERY)) @@ -631,7 +607,7 @@ nilfs_set_default_options(struct nilfs_sb_info *sbi, struct nilfs_super_block *sbp) { sbi->s_mount_opt = - NILFS_MOUNT_ERRORS_CONT | NILFS_MOUNT_BARRIER; + NILFS_MOUNT_ERRORS_RO | NILFS_MOUNT_BARRIER; } static int nilfs_setup_super(struct nilfs_sb_info *sbi) @@ -778,9 +754,7 @@ nilfs_fill_super(struct super_block *sb, void *data, int silent, goto failed_sbi; } cno = sbi->s_snapshot_cno; - } else - /* Read-only mount */ - sbi->s_snapshot_cno = cno; + } } err = nilfs_attach_checkpoint(sbi, cno); @@ -849,7 +823,7 @@ static int nilfs_remount(struct super_block *sb, int *flags, char *data) struct the_nilfs *nilfs = sbi->s_nilfs; unsigned long old_sb_flags; struct nilfs_mount_options old_opts; - int err; + int was_snapshot, err; lock_kernel(); @@ -857,6 +831,7 @@ static int nilfs_remount(struct super_block *sb, int *flags, char *data) old_sb_flags = sb->s_flags; old_opts.mount_opt = sbi->s_mount_opt; old_opts.snapshot_cno = sbi->s_snapshot_cno; + was_snapshot = nilfs_test_opt(sbi, SNAPSHOT); if (!parse_options(data, sb)) { err = -EINVAL; @@ -864,20 +839,32 @@ static int nilfs_remount(struct super_block *sb, int *flags, char *data) } sb->s_flags = (sb->s_flags & ~MS_POSIXACL); - if ((*flags & MS_RDONLY) && - sbi->s_snapshot_cno != old_opts.snapshot_cno) { - printk(KERN_WARNING "NILFS (device %s): couldn't " - "remount to a different snapshot.\n", - sb->s_id); - err = -EINVAL; - goto restore_opts; + err = -EINVAL; + if (was_snapshot) { + if (!(*flags & MS_RDONLY)) { + printk(KERN_ERR "NILFS (device %s): cannot remount " + "snapshot read/write.\n", + sb->s_id); + goto restore_opts; + } else if (sbi->s_snapshot_cno != old_opts.snapshot_cno) { + printk(KERN_ERR "NILFS (device %s): cannot " + "remount to a different snapshot.\n", + sb->s_id); + goto restore_opts; + } + } else { + if (nilfs_test_opt(sbi, SNAPSHOT)) { + printk(KERN_ERR "NILFS (device %s): cannot change " + "a regular mount to a snapshot.\n", + sb->s_id); + goto restore_opts; + } } if (!nilfs_valid_fs(nilfs)) { printk(KERN_WARNING "NILFS (device %s): couldn't " "remount because the filesystem is in an " "incomplete recovery state.\n", sb->s_id); - err = -EINVAL; goto restore_opts; } @@ -888,9 +875,6 @@ static int nilfs_remount(struct super_block *sb, int *flags, char *data) nilfs_detach_segment_constructor(sbi); sb->s_flags |= MS_RDONLY; - sbi->s_snapshot_cno = nilfs_last_cno(nilfs); - /* nilfs_set_opt(sbi, SNAPSHOT); */ - /* * Remounting a valid RW partition RDONLY, so set * the RDONLY flag and then mark the partition as valid again. @@ -909,24 +893,7 @@ static int nilfs_remount(struct super_block *sb, int *flags, char *data) * store the current valid flag. (It may have been changed * by fsck since we originally mounted the partition.) */ - if (nilfs->ns_current && nilfs->ns_current != sbi) { - printk(KERN_WARNING "NILFS (device %s): couldn't " - "remount because an RW-mount exists.\n", - sb->s_id); - err = -EBUSY; - goto restore_opts; - } - if (sbi->s_snapshot_cno != nilfs_last_cno(nilfs)) { - printk(KERN_WARNING "NILFS (device %s): couldn't " - "remount because the current RO-mount is not " - "the latest one.\n", - sb->s_id); - err = -EINVAL; - goto restore_opts; - } sb->s_flags &= ~MS_RDONLY; - nilfs_clear_opt(sbi, SNAPSHOT); - sbi->s_snapshot_cno = 0; err = nilfs_attach_segment_constructor(sbi); if (err) @@ -935,8 +902,6 @@ static int nilfs_remount(struct super_block *sb, int *flags, char *data) down_write(&nilfs->ns_sem); nilfs_setup_super(sbi); up_write(&nilfs->ns_sem); - - nilfs->ns_current = sbi; } out: up_write(&nilfs->ns_super_sem); @@ -1022,10 +987,14 @@ nilfs_get_sb(struct file_system_type *fs_type, int flags, { struct nilfs_super_data sd; struct super_block *s; + fmode_t mode = FMODE_READ; struct the_nilfs *nilfs; int err, need_to_close = 1; - sd.bdev = open_bdev_exclusive(dev_name, flags, fs_type); + if (!(flags & MS_RDONLY)) + mode |= FMODE_WRITE; + + sd.bdev = open_bdev_exclusive(dev_name, mode, fs_type); if (IS_ERR(sd.bdev)) return PTR_ERR(sd.bdev); @@ -1092,10 +1061,12 @@ nilfs_get_sb(struct file_system_type *fs_type, int flags, /* New superblock instance created */ s->s_flags = flags; + s->s_mode = mode; strlcpy(s->s_id, bdevname(sd.bdev, b), sizeof(s->s_id)); sb_set_blocksize(s, block_size(sd.bdev)); - err = nilfs_fill_super(s, data, flags & MS_VERBOSE, nilfs); + err = nilfs_fill_super(s, data, flags & MS_SILENT ? 1 : 0, + nilfs); if (err) goto cancel_new; @@ -1106,7 +1077,7 @@ nilfs_get_sb(struct file_system_type *fs_type, int flags, mutex_unlock(&nilfs->ns_mount_mutex); put_nilfs(nilfs); if (need_to_close) - close_bdev_exclusive(sd.bdev, flags); + close_bdev_exclusive(sd.bdev, mode); simple_set_mnt(mnt, s); return 0; @@ -1114,7 +1085,7 @@ nilfs_get_sb(struct file_system_type *fs_type, int flags, mutex_unlock(&nilfs->ns_mount_mutex); put_nilfs(nilfs); failed: - close_bdev_exclusive(sd.bdev, flags); + close_bdev_exclusive(sd.bdev, mode); return err; @@ -1124,7 +1095,7 @@ nilfs_get_sb(struct file_system_type *fs_type, int flags, put_nilfs(nilfs); deactivate_locked_super(s); /* - * deactivate_super() invokes close_bdev_exclusive(). + * deactivate_locked_super() invokes close_bdev_exclusive(). * We must finish all post-cleaning before this call; * put_nilfs() needs the block device. */ @@ -1139,54 +1110,93 @@ struct file_system_type nilfs_fs_type = { .fs_flags = FS_REQUIRES_DEV, }; -static int __init init_nilfs_fs(void) +static void nilfs_inode_init_once(void *obj) { - int err; - - err = nilfs_init_inode_cache(); - if (err) - goto failed; + struct nilfs_inode_info *ii = obj; - err = nilfs_init_transaction_cache(); - if (err) - goto failed_inode_cache; + INIT_LIST_HEAD(&ii->i_dirty); +#ifdef CONFIG_NILFS_XATTR + init_rwsem(&ii->xattr_sem); +#endif + nilfs_btnode_cache_init_once(&ii->i_btnode_cache); + ii->i_bmap = (struct nilfs_bmap *)&ii->i_bmap_union; + inode_init_once(&ii->vfs_inode); +} - err = nilfs_init_segbuf_cache(); - if (err) - goto failed_transaction_cache; +static void nilfs_segbuf_init_once(void *obj) +{ + memset(obj, 0, sizeof(struct nilfs_segment_buffer)); +} - err = nilfs_btree_path_cache_init(); - if (err) - goto failed_segbuf_cache; +static void nilfs_destroy_cachep(void) +{ + if (nilfs_inode_cachep) + kmem_cache_destroy(nilfs_inode_cachep); + if (nilfs_transaction_cachep) + kmem_cache_destroy(nilfs_transaction_cachep); + if (nilfs_segbuf_cachep) + kmem_cache_destroy(nilfs_segbuf_cachep); + if (nilfs_btree_path_cache) + kmem_cache_destroy(nilfs_btree_path_cache); +} - err = register_filesystem(&nilfs_fs_type); - if (err) - goto failed_btree_path_cache; +static int __init nilfs_init_cachep(void) +{ + nilfs_inode_cachep = kmem_cache_create("nilfs2_inode_cache", + sizeof(struct nilfs_inode_info), 0, + SLAB_RECLAIM_ACCOUNT, nilfs_inode_init_once); + if (!nilfs_inode_cachep) + goto fail; + + nilfs_transaction_cachep = kmem_cache_create("nilfs2_transaction_cache", + sizeof(struct nilfs_transaction_info), 0, + SLAB_RECLAIM_ACCOUNT, NULL); + if (!nilfs_transaction_cachep) + goto fail; + + nilfs_segbuf_cachep = kmem_cache_create("nilfs2_segbuf_cache", + sizeof(struct nilfs_segment_buffer), 0, + SLAB_RECLAIM_ACCOUNT, nilfs_segbuf_init_once); + if (!nilfs_segbuf_cachep) + goto fail; + + nilfs_btree_path_cache = kmem_cache_create("nilfs2_btree_path_cache", + sizeof(struct nilfs_btree_path) * NILFS_BTREE_LEVEL_MAX, + 0, 0, NULL); + if (!nilfs_btree_path_cache) + goto fail; return 0; - failed_btree_path_cache: - nilfs_btree_path_cache_destroy(); +fail: + nilfs_destroy_cachep(); + return -ENOMEM; +} + +static int __init init_nilfs_fs(void) +{ + int err; - failed_segbuf_cache: - nilfs_destroy_segbuf_cache(); + err = nilfs_init_cachep(); + if (err) + goto fail; - failed_transaction_cache: - nilfs_destroy_transaction_cache(); + err = register_filesystem(&nilfs_fs_type); + if (err) + goto free_cachep; - failed_inode_cache: - nilfs_destroy_inode_cache(); + printk(KERN_INFO "NILFS version 2 loaded\n"); + return 0; - failed: +free_cachep: + nilfs_destroy_cachep(); +fail: return err; } static void __exit exit_nilfs_fs(void) { - nilfs_destroy_segbuf_cache(); - nilfs_destroy_transaction_cache(); - nilfs_destroy_inode_cache(); - nilfs_btree_path_cache_destroy(); + nilfs_destroy_cachep(); unregister_filesystem(&nilfs_fs_type); } diff --git a/fs/nilfs2/the_nilfs.c b/fs/nilfs2/the_nilfs.c index 33871f7e4f01..a756168a21c2 100644 --- a/fs/nilfs2/the_nilfs.c +++ b/fs/nilfs2/the_nilfs.c @@ -486,11 +486,15 @@ static int nilfs_load_super_block(struct the_nilfs *nilfs, printk(KERN_WARNING "NILFS warning: unable to read secondary superblock\n"); + /* + * Compare two super blocks and set 1 in swp if the secondary + * super block is valid and newer. Otherwise, set 0 in swp. + */ valid[0] = nilfs_valid_sb(sbp[0]); valid[1] = nilfs_valid_sb(sbp[1]); - swp = valid[1] && - (!valid[0] || - le64_to_cpu(sbp[1]->s_wtime) > le64_to_cpu(sbp[0]->s_wtime)); + swp = valid[1] && (!valid[0] || + le64_to_cpu(sbp[1]->s_last_cno) > + le64_to_cpu(sbp[0]->s_last_cno)); if (valid[swp] && nilfs_sb2_bad_offset(sbp[swp], sb2off)) { brelse(sbh[1]); |