diff options
| -rw-r--r-- | fs/ext4/extents_status.c | 67 | ||||
| -rw-r--r-- | fs/ext4/extents_status.h | 64 | ||||
| -rw-r--r-- | fs/ext4/inode.c | 3 | ||||
| -rw-r--r-- | include/trace/events/ext4.h | 34 |
4 files changed, 142 insertions, 26 deletions
diff --git a/fs/ext4/extents_status.c b/fs/ext4/extents_status.c index c9921cf..1f5fd44 100644 --- a/fs/ext4/extents_status.c +++ b/fs/ext4/extents_status.c @@ -179,7 +179,9 @@ static void ext4_es_print_tree(struct inode *inode) while (node) { struct extent_status *es; es = rb_entry(node, struct extent_status, rb_node); - printk(KERN_DEBUG " [%u/%u)", es->es_lblk, es->es_len); + printk(KERN_DEBUG " [%u/%u) %llu %llx", + es->es_lblk, es->es_len, + ext4_es_pblock(es), ext4_es_status(es)); node = rb_next(node); } printk(KERN_DEBUG "\n"); @@ -234,7 +236,7 @@ static struct extent_status *__es_tree_search(struct rb_root *root, * @es: delayed extent that we found * * Returns the first block of the next extent after es, otherwise - * EXT_MAX_BLOCKS if no delay extent is found. + * EXT_MAX_BLOCKS if no extent is found. * Delayed extent is returned via @es. */ ext4_lblk_t ext4_es_find_extent(struct inode *inode, struct extent_status *es) @@ -249,17 +251,18 @@ ext4_lblk_t ext4_es_find_extent(struct inode *inode, struct extent_status *es) read_lock(&EXT4_I(inode)->i_es_lock); tree = &EXT4_I(inode)->i_es_tree; - /* find delay extent in cache firstly */ + /* find extent in cache firstly */ + es->es_len = es->es_pblk = 0; if (tree->cache_es) { es1 = tree->cache_es; if (in_range(es->es_lblk, es1->es_lblk, es1->es_len)) { - es_debug("%u cached by [%u/%u)\n", - es->es_lblk, es1->es_lblk, es1->es_len); + es_debug("%u cached by [%u/%u) %llu %llx\n", + es->es_lblk, es1->es_lblk, es1->es_len, + ext4_es_pblock(es1), ext4_es_status(es1)); goto out; } } - es->es_len = 0; es1 = __es_tree_search(&tree->root, es->es_lblk); out: @@ -267,6 +270,7 @@ out: tree->cache_es = es1; es->es_lblk = es1->es_lblk; es->es_len = es1->es_len; + es->es_pblk = es1->es_pblk; node = rb_next(&es1->rb_node); if (node) { es1 = rb_entry(node, struct extent_status, rb_node); @@ -281,7 +285,7 @@ out: } static struct extent_status * -ext4_es_alloc_extent(ext4_lblk_t lblk, ext4_lblk_t len) +ext4_es_alloc_extent(ext4_lblk_t lblk, ext4_lblk_t len, ext4_fsblk_t pblk) { struct extent_status *es; es = kmem_cache_alloc(ext4_es_cachep, GFP_ATOMIC); @@ -289,6 +293,7 @@ ext4_es_alloc_extent(ext4_lblk_t lblk, ext4_lblk_t len) return NULL; es->es_lblk = lblk; es->es_len = len; + es->es_pblk = pblk; return es; } @@ -301,6 +306,8 @@ static void ext4_es_free_extent(struct extent_status *es) * Check whether or not two extents can be merged * Condition: * - logical block number is contiguous + * - physical block number is contiguous + * - status is equal */ static int ext4_es_can_be_merged(struct extent_status *es1, struct extent_status *es2) @@ -308,6 +315,13 @@ static int ext4_es_can_be_merged(struct extent_status *es1, if (es1->es_lblk + es1->es_len != es2->es_lblk) return 0; + if (ext4_es_status(es1) != ext4_es_status(es2)) + return 0; + + if ((ext4_es_is_written(es1) || ext4_es_is_unwritten(es1)) && + (ext4_es_pblock(es1) + es1->es_len != ext4_es_pblock(es2))) + return 0; + return 1; } @@ -371,6 +385,10 @@ static int __es_insert_extent(struct ext4_es_tree *tree, */ es->es_lblk = newes->es_lblk; es->es_len += newes->es_len; + if (ext4_es_is_written(es) || + ext4_es_is_unwritten(es)) + ext4_es_store_pblock(es, + newes->es_pblk); es = ext4_es_try_to_merge_left(tree, es); goto out; } @@ -388,7 +406,8 @@ static int __es_insert_extent(struct ext4_es_tree *tree, } } - es = ext4_es_alloc_extent(newes->es_lblk, newes->es_len); + es = ext4_es_alloc_extent(newes->es_lblk, newes->es_len, + newes->es_pblk); if (!es) return -ENOMEM; rb_link_node(&es->rb_node, parent, p); @@ -408,21 +427,24 @@ out: * Return 0 on success, error code on failure. */ int ext4_es_insert_extent(struct inode *inode, ext4_lblk_t lblk, - ext4_lblk_t len) + ext4_lblk_t len, ext4_fsblk_t pblk, + unsigned long long status) { struct ext4_es_tree *tree; struct extent_status newes; ext4_lblk_t end = lblk + len - 1; int err = 0; - trace_ext4_es_insert_extent(inode, lblk, len); - es_debug("add [%u/%u) to extent status tree of inode %lu\n", - lblk, len, inode->i_ino); + es_debug("add [%u/%u) %llu %llx to extent status tree of inode %lu\n", + lblk, len, pblk, status, inode->i_ino); BUG_ON(end < lblk); newes.es_lblk = lblk; newes.es_len = len; + ext4_es_store_pblock(&newes, pblk); + ext4_es_store_status(&newes, status); + trace_ext4_es_insert_extent(inode, &newes); write_lock(&EXT4_I(inode)->i_es_lock); tree = &EXT4_I(inode)->i_es_tree; @@ -446,6 +468,7 @@ static int __es_remove_extent(struct ext4_es_tree *tree, ext4_lblk_t lblk, struct extent_status *es; struct extent_status orig_es; ext4_lblk_t len1, len2; + ext4_fsblk_t block; int err = 0; es = __es_tree_search(&tree->root, lblk); @@ -459,6 +482,8 @@ static int __es_remove_extent(struct ext4_es_tree *tree, ext4_lblk_t lblk, orig_es.es_lblk = es->es_lblk; orig_es.es_len = es->es_len; + orig_es.es_pblk = es->es_pblk; + len1 = lblk > es->es_lblk ? lblk - es->es_lblk : 0; len2 = ext4_es_end(es) > end ? ext4_es_end(es) - end : 0; if (len1 > 0) @@ -469,6 +494,13 @@ static int __es_remove_extent(struct ext4_es_tree *tree, ext4_lblk_t lblk, newes.es_lblk = end + 1; newes.es_len = len2; + if (ext4_es_is_written(&orig_es) || + ext4_es_is_unwritten(&orig_es)) { + block = ext4_es_pblock(&orig_es) + + orig_es.es_len - len2; + ext4_es_store_pblock(&newes, block); + } + ext4_es_store_status(&newes, ext4_es_status(&orig_es)); err = __es_insert_extent(tree, &newes); if (err) { es->es_lblk = orig_es.es_lblk; @@ -478,6 +510,11 @@ static int __es_remove_extent(struct ext4_es_tree *tree, ext4_lblk_t lblk, } else { es->es_lblk = end + 1; es->es_len = len2; + if (ext4_es_is_written(es) || + ext4_es_is_unwritten(es)) { + block = orig_es.es_pblk + orig_es.es_len - len2; + ext4_es_store_pblock(es, block); + } } goto out; } @@ -502,9 +539,15 @@ static int __es_remove_extent(struct ext4_es_tree *tree, ext4_lblk_t lblk, } if (es && es->es_lblk < end + 1) { + ext4_lblk_t orig_len = es->es_len; + len1 = ext4_es_end(es) - end; es->es_lblk = end + 1; es->es_len = len1; + if (ext4_es_is_written(es) || ext4_es_is_unwritten(es)) { + block = es->es_pblk + orig_len - len1; + ext4_es_store_pblock(es, block); + } } out: diff --git a/fs/ext4/extents_status.h b/fs/ext4/extents_status.h index 81e9339..3cad833 100644 --- a/fs/ext4/extents_status.h +++ b/fs/ext4/extents_status.h @@ -20,10 +20,21 @@ #define es_debug(fmt, ...) no_printk(fmt, ##__VA_ARGS__) #endif +#define EXTENT_STATUS_WRITTEN 0x80000000 /* written extent */ +#define EXTENT_STATUS_UNWRITTEN 0x40000000 /* unwritten extent */ +#define EXTENT_STATUS_DELAYED 0x20000000 /* delayed extent */ +#define EXTENT_STATUS_HOLE 0x10000000 /* hole */ + +#define EXTENT_STATUS_FLAGS (EXTENT_STATUS_WRITTEN | \ + EXTENT_STATUS_UNWRITTEN | \ + EXTENT_STATUS_DELAYED | \ + EXTENT_STATUS_HOLE) + struct extent_status { struct rb_node rb_node; ext4_lblk_t es_lblk; /* first logical block extent covers */ ext4_lblk_t es_len; /* length of extent in block */ + ext4_fsblk_t es_pblk; /* first physical block */ }; struct ext4_es_tree { @@ -36,10 +47,61 @@ extern void ext4_exit_es(void); extern void ext4_es_init_tree(struct ext4_es_tree *tree); extern int ext4_es_insert_extent(struct inode *inode, ext4_lblk_t lblk, - ext4_lblk_t len); + ext4_lblk_t len, ext4_fsblk_t pblk, + unsigned long long status); extern int ext4_es_remove_extent(struct inode *inode, ext4_lblk_t lblk, ext4_lblk_t len); extern ext4_lblk_t ext4_es_find_extent(struct inode *inode, struct extent_status *es); +static inline int ext4_es_is_written(struct extent_status *es) +{ + return (es->es_pblk & EXTENT_STATUS_WRITTEN); +} + +static inline int ext4_es_is_unwritten(struct extent_status *es) +{ + return (es->es_pblk & EXTENT_STATUS_UNWRITTEN); +} + +static inline int ext4_es_is_delayed(struct extent_status *es) +{ + return (es->es_pblk & EXTENT_STATUS_DELAYED); +} + +static inline int ext4_es_is_hole(struct extent_status *es) +{ + return (es->es_pblk & EXTENT_STATUS_HOLE); +} + +static inline ext4_fsblk_t ext4_es_status(struct extent_status *es) +{ + return (es->es_pblk & EXTENT_STATUS_FLAGS); +} + +static inline ext4_fsblk_t ext4_es_pblock(struct extent_status *es) +{ + return (es->es_pblk & ~EXTENT_STATUS_FLAGS); +} + +static inline void ext4_es_store_pblock(struct extent_status *es, + ext4_fsblk_t pb) +{ + ext4_fsblk_t block; + + block = (pb & ~EXTENT_STATUS_FLAGS) | + (es->es_pblk & EXTENT_STATUS_FLAGS); + es->es_pblk = block; +} + +static inline void ext4_es_store_status(struct extent_status *es, + unsigned long long status) +{ + ext4_fsblk_t block; + + block = (status & EXTENT_STATUS_FLAGS) | + (es->es_pblk & ~EXTENT_STATUS_FLAGS); + es->es_pblk = block; +} + #endif /* _EXT4_EXTENTS_STATUS_H */ diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index f4466c3..e0e1cb0 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -1784,7 +1784,8 @@ static int ext4_da_map_blocks(struct inode *inode, sector_t iblock, goto out_unlock; } - retval = ext4_es_insert_extent(inode, map->m_lblk, map->m_len); + retval = ext4_es_insert_extent(inode, map->m_lblk, map->m_len, + ~0, EXTENT_STATUS_DELAYED); if (retval) goto out_unlock; diff --git a/include/trace/events/ext4.h b/include/trace/events/ext4.h index 52c9238..0ee507f 100644 --- a/include/trace/events/ext4.h +++ b/include/trace/events/ext4.h @@ -2093,28 +2093,33 @@ TRACE_EVENT(ext4_ext_remove_space_done, ); TRACE_EVENT(ext4_es_insert_extent, - TP_PROTO(struct inode *inode, ext4_lblk_t lblk, ext4_lblk_t len), + TP_PROTO(struct inode *inode, struct extent_status *es), - TP_ARGS(inode, lblk, len), + TP_ARGS(inode, es), TP_STRUCT__entry( - __field( dev_t, dev ) - __field( ino_t, ino ) - __field( loff_t, lblk ) - __field( loff_t, len ) + __field( dev_t, dev ) + __field( ino_t, ino ) + __field( ext4_lblk_t, lblk ) + __field( ext4_lblk_t, len ) + __field( ext4_fsblk_t, pblk ) + __field( unsigned long long, status ) ), TP_fast_assign( __entry->dev = inode->i_sb->s_dev; __entry->ino = inode->i_ino; - __entry->lblk = lblk; - __entry->len = len; + __entry->lblk = es->es_lblk; + __entry->len = es->es_len; + __entry->pblk = ext4_es_pblock(es); + __entry->status = ext4_es_status(es); ), - TP_printk("dev %d,%d ino %lu es [%lld/%lld)", + TP_printk("dev %d,%d ino %lu es [%u/%u) mapped %llu status %llx", MAJOR(__entry->dev), MINOR(__entry->dev), (unsigned long) __entry->ino, - __entry->lblk, __entry->len) + __entry->lblk, __entry->len, + __entry->pblk, __entry->status) ); TRACE_EVENT(ext4_es_remove_extent, @@ -2175,6 +2180,8 @@ TRACE_EVENT(ext4_es_find_extent_exit, __field( ino_t, ino ) __field( ext4_lblk_t, lblk ) __field( ext4_lblk_t, len ) + __field( ext4_fsblk_t, pblk ) + __field( unsigned long long, status ) __field( ext4_lblk_t, ret ) ), @@ -2183,13 +2190,16 @@ TRACE_EVENT(ext4_es_find_extent_exit, __entry->ino = inode->i_ino; __entry->lblk = es->es_lblk; __entry->len = es->es_len; + __entry->pblk = ext4_es_pblock(es); + __entry->status = ext4_es_status(es); __entry->ret = ret; ), - TP_printk("dev %d,%d ino %lu es [%u/%u) ret %u", + TP_printk("dev %d,%d ino %lu es [%u/%u) mapped %llu status %llx ret %u", MAJOR(__entry->dev), MINOR(__entry->dev), (unsigned long) __entry->ino, - __entry->lblk, __entry->len, __entry->ret) + __entry->lblk, __entry->len, + __entry->pblk, __entry->status, __entry->ret) ); #endif /* _TRACE_EXT4_H */ |
