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-rw-r--r--MAINTAINERS8
-rw-r--r--fs/btrfs/async-thread.c1
-rw-r--r--fs/btrfs/compression.c1
-rw-r--r--fs/btrfs/ctree.c21
-rw-r--r--fs/btrfs/ctree.h23
-rw-r--r--fs/btrfs/disk-io.c104
-rw-r--r--fs/btrfs/disk-io.h2
-rw-r--r--fs/btrfs/extent-tree.c41
-rw-r--r--fs/btrfs/extent_io.c93
-rw-r--r--fs/btrfs/extent_io.h2
-rw-r--r--fs/btrfs/extent_map.c1
-rw-r--r--fs/btrfs/file.c5
-rw-r--r--fs/btrfs/inode.c25
-rw-r--r--fs/btrfs/ioctl.c1
-rw-r--r--fs/btrfs/ordered-data.c4
-rw-r--r--fs/btrfs/super.c6
-rw-r--r--fs/btrfs/transaction.c4
-rw-r--r--fs/btrfs/tree-log.c350
-rw-r--r--fs/btrfs/volumes.c38
-rw-r--r--fs/btrfs/xattr.c14
20 files changed, 426 insertions, 318 deletions
diff --git a/MAINTAINERS b/MAINTAINERS
index d992d407197b..8a7b0b36e8b4 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1021,6 +1021,14 @@ M: mb@bu3sch.de
1021W: http://bu3sch.de/btgpio.php 1021W: http://bu3sch.de/btgpio.php
1022S: Maintained 1022S: Maintained
1023 1023
1024BTRFS FILE SYSTEM
1025P: Chris Mason
1026M: chris.mason@oracle.com
1027L: linux-btrfs@vger.kernel.org
1028W: http://btrfs.wiki.kernel.org/
1029T: git kernel.org:/pub/scm/linux/kernel/git/mason/btrfs-unstable.git
1030S: Maintained
1031
1024BTTV VIDEO4LINUX DRIVER 1032BTTV VIDEO4LINUX DRIVER
1025P: Mauro Carvalho Chehab 1033P: Mauro Carvalho Chehab
1026M: mchehab@infradead.org 1034M: mchehab@infradead.org
diff --git a/fs/btrfs/async-thread.c b/fs/btrfs/async-thread.c
index 8e2fec05dbe0..d5f4e94f2ca2 100644
--- a/fs/btrfs/async-thread.c
+++ b/fs/btrfs/async-thread.c
@@ -16,7 +16,6 @@
16 * Boston, MA 021110-1307, USA. 16 * Boston, MA 021110-1307, USA.
17 */ 17 */
18 18
19#include <linux/version.h>
20#include <linux/kthread.h> 19#include <linux/kthread.h>
21#include <linux/list.h> 20#include <linux/list.h>
22#include <linux/spinlock.h> 21#include <linux/spinlock.h>
diff --git a/fs/btrfs/compression.c b/fs/btrfs/compression.c
index ee848d8585d9..ab07627084f1 100644
--- a/fs/btrfs/compression.c
+++ b/fs/btrfs/compression.c
@@ -32,7 +32,6 @@
32#include <linux/swap.h> 32#include <linux/swap.h>
33#include <linux/writeback.h> 33#include <linux/writeback.h>
34#include <linux/bit_spinlock.h> 34#include <linux/bit_spinlock.h>
35#include <linux/version.h>
36#include <linux/pagevec.h> 35#include <linux/pagevec.h>
37#include "compat.h" 36#include "compat.h"
38#include "ctree.h" 37#include "ctree.h"
diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index 9e46c0776816..2603ee539b7a 100644
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -1210,8 +1210,7 @@ static noinline void reada_for_search(struct btrfs_root *root,
1210 struct btrfs_disk_key disk_key; 1210 struct btrfs_disk_key disk_key;
1211 u32 nritems; 1211 u32 nritems;
1212 u64 search; 1212 u64 search;
1213 u64 lowest_read; 1213 u64 target;
1214 u64 highest_read;
1215 u64 nread = 0; 1214 u64 nread = 0;
1216 int direction = path->reada; 1215 int direction = path->reada;
1217 struct extent_buffer *eb; 1216 struct extent_buffer *eb;
@@ -1235,8 +1234,7 @@ static noinline void reada_for_search(struct btrfs_root *root,
1235 return; 1234 return;
1236 } 1235 }
1237 1236
1238 highest_read = search; 1237 target = search;
1239 lowest_read = search;
1240 1238
1241 nritems = btrfs_header_nritems(node); 1239 nritems = btrfs_header_nritems(node);
1242 nr = slot; 1240 nr = slot;
@@ -1256,24 +1254,15 @@ static noinline void reada_for_search(struct btrfs_root *root,
1256 break; 1254 break;
1257 } 1255 }
1258 search = btrfs_node_blockptr(node, nr); 1256 search = btrfs_node_blockptr(node, nr);
1259 if ((search >= lowest_read && search <= highest_read) || 1257 if ((search <= target && target - search <= 65536) ||
1260 (search < lowest_read && lowest_read - search <= 16384) || 1258 (search > target && search - target <= 65536)) {
1261 (search > highest_read && search - highest_read <= 16384)) {
1262 readahead_tree_block(root, search, blocksize, 1259 readahead_tree_block(root, search, blocksize,
1263 btrfs_node_ptr_generation(node, nr)); 1260 btrfs_node_ptr_generation(node, nr));
1264 nread += blocksize; 1261 nread += blocksize;
1265 } 1262 }
1266 nscan++; 1263 nscan++;
1267 if (path->reada < 2 && (nread > (64 * 1024) || nscan > 32)) 1264 if ((nread > 65536 || nscan > 32))
1268 break; 1265 break;
1269
1270 if (nread > (256 * 1024) || nscan > 128)
1271 break;
1272
1273 if (search < lowest_read)
1274 lowest_read = search;
1275 if (search > highest_read)
1276 highest_read = search;
1277 } 1266 }
1278} 1267}
1279 1268
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index eee060f88113..de103a8a815e 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -454,17 +454,11 @@ struct btrfs_timespec {
454 __le32 nsec; 454 __le32 nsec;
455} __attribute__ ((__packed__)); 455} __attribute__ ((__packed__));
456 456
457typedef enum { 457enum btrfs_compression_type {
458 BTRFS_COMPRESS_NONE = 0, 458 BTRFS_COMPRESS_NONE = 0,
459 BTRFS_COMPRESS_ZLIB = 1, 459 BTRFS_COMPRESS_ZLIB = 1,
460 BTRFS_COMPRESS_LAST = 2, 460 BTRFS_COMPRESS_LAST = 2,
461} btrfs_compression_type; 461};
462
463/* we don't understand any encryption methods right now */
464typedef enum {
465 BTRFS_ENCRYPTION_NONE = 0,
466 BTRFS_ENCRYPTION_LAST = 1,
467} btrfs_encryption_type;
468 462
469struct btrfs_inode_item { 463struct btrfs_inode_item {
470 /* nfs style generation number */ 464 /* nfs style generation number */
@@ -701,9 +695,7 @@ struct btrfs_fs_info {
701 struct btrfs_transaction *running_transaction; 695 struct btrfs_transaction *running_transaction;
702 wait_queue_head_t transaction_throttle; 696 wait_queue_head_t transaction_throttle;
703 wait_queue_head_t transaction_wait; 697 wait_queue_head_t transaction_wait;
704
705 wait_queue_head_t async_submit_wait; 698 wait_queue_head_t async_submit_wait;
706 wait_queue_head_t tree_log_wait;
707 699
708 struct btrfs_super_block super_copy; 700 struct btrfs_super_block super_copy;
709 struct btrfs_super_block super_for_commit; 701 struct btrfs_super_block super_for_commit;
@@ -730,10 +722,6 @@ struct btrfs_fs_info {
730 atomic_t async_submit_draining; 722 atomic_t async_submit_draining;
731 atomic_t nr_async_bios; 723 atomic_t nr_async_bios;
732 atomic_t async_delalloc_pages; 724 atomic_t async_delalloc_pages;
733 atomic_t tree_log_writers;
734 atomic_t tree_log_commit;
735 unsigned long tree_log_batch;
736 u64 tree_log_transid;
737 725
738 /* 726 /*
739 * this is used by the balancing code to wait for all the pending 727 * this is used by the balancing code to wait for all the pending
@@ -833,7 +821,14 @@ struct btrfs_root {
833 struct kobject root_kobj; 821 struct kobject root_kobj;
834 struct completion kobj_unregister; 822 struct completion kobj_unregister;
835 struct mutex objectid_mutex; 823 struct mutex objectid_mutex;
824
836 struct mutex log_mutex; 825 struct mutex log_mutex;
826 wait_queue_head_t log_writer_wait;
827 wait_queue_head_t log_commit_wait[2];
828 atomic_t log_writers;
829 atomic_t log_commit[2];
830 unsigned long log_transid;
831 unsigned long log_batch;
837 832
838 u64 objectid; 833 u64 objectid;
839 u64 last_trans; 834 u64 last_trans;
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 81a313874ae5..7feac5a475e9 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -16,7 +16,6 @@
16 * Boston, MA 021110-1307, USA. 16 * Boston, MA 021110-1307, USA.
17 */ 17 */
18 18
19#include <linux/version.h>
20#include <linux/fs.h> 19#include <linux/fs.h>
21#include <linux/blkdev.h> 20#include <linux/blkdev.h>
22#include <linux/scatterlist.h> 21#include <linux/scatterlist.h>
@@ -850,6 +849,14 @@ static int __setup_root(u32 nodesize, u32 leafsize, u32 sectorsize,
850 spin_lock_init(&root->list_lock); 849 spin_lock_init(&root->list_lock);
851 mutex_init(&root->objectid_mutex); 850 mutex_init(&root->objectid_mutex);
852 mutex_init(&root->log_mutex); 851 mutex_init(&root->log_mutex);
852 init_waitqueue_head(&root->log_writer_wait);
853 init_waitqueue_head(&root->log_commit_wait[0]);
854 init_waitqueue_head(&root->log_commit_wait[1]);
855 atomic_set(&root->log_commit[0], 0);
856 atomic_set(&root->log_commit[1], 0);
857 atomic_set(&root->log_writers, 0);
858 root->log_batch = 0;
859 root->log_transid = 0;
853 extent_io_tree_init(&root->dirty_log_pages, 860 extent_io_tree_init(&root->dirty_log_pages,
854 fs_info->btree_inode->i_mapping, GFP_NOFS); 861 fs_info->btree_inode->i_mapping, GFP_NOFS);
855 862
@@ -934,15 +941,16 @@ int btrfs_free_log_root_tree(struct btrfs_trans_handle *trans,
934 return 0; 941 return 0;
935} 942}
936 943
937int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans, 944static struct btrfs_root *alloc_log_tree(struct btrfs_trans_handle *trans,
938 struct btrfs_fs_info *fs_info) 945 struct btrfs_fs_info *fs_info)
939{ 946{
940 struct btrfs_root *root; 947 struct btrfs_root *root;
941 struct btrfs_root *tree_root = fs_info->tree_root; 948 struct btrfs_root *tree_root = fs_info->tree_root;
949 struct extent_buffer *leaf;
942 950
943 root = kzalloc(sizeof(*root), GFP_NOFS); 951 root = kzalloc(sizeof(*root), GFP_NOFS);
944 if (!root) 952 if (!root)
945 return -ENOMEM; 953 return ERR_PTR(-ENOMEM);
946 954
947 __setup_root(tree_root->nodesize, tree_root->leafsize, 955 __setup_root(tree_root->nodesize, tree_root->leafsize,
948 tree_root->sectorsize, tree_root->stripesize, 956 tree_root->sectorsize, tree_root->stripesize,
@@ -951,12 +959,23 @@ int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans,
951 root->root_key.objectid = BTRFS_TREE_LOG_OBJECTID; 959 root->root_key.objectid = BTRFS_TREE_LOG_OBJECTID;
952 root->root_key.type = BTRFS_ROOT_ITEM_KEY; 960 root->root_key.type = BTRFS_ROOT_ITEM_KEY;
953 root->root_key.offset = BTRFS_TREE_LOG_OBJECTID; 961 root->root_key.offset = BTRFS_TREE_LOG_OBJECTID;
962 /*
963 * log trees do not get reference counted because they go away
964 * before a real commit is actually done. They do store pointers
965 * to file data extents, and those reference counts still get
966 * updated (along with back refs to the log tree).
967 */
954 root->ref_cows = 0; 968 root->ref_cows = 0;
955 969
956 root->node = btrfs_alloc_free_block(trans, root, root->leafsize, 970 leaf = btrfs_alloc_free_block(trans, root, root->leafsize,
957 0, BTRFS_TREE_LOG_OBJECTID, 971 0, BTRFS_TREE_LOG_OBJECTID,
958 trans->transid, 0, 0, 0); 972 trans->transid, 0, 0, 0);
973 if (IS_ERR(leaf)) {
974 kfree(root);
975 return ERR_CAST(leaf);
976 }
959 977
978 root->node = leaf;
960 btrfs_set_header_nritems(root->node, 0); 979 btrfs_set_header_nritems(root->node, 0);
961 btrfs_set_header_level(root->node, 0); 980 btrfs_set_header_level(root->node, 0);
962 btrfs_set_header_bytenr(root->node, root->node->start); 981 btrfs_set_header_bytenr(root->node, root->node->start);
@@ -968,7 +987,48 @@ int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans,
968 BTRFS_FSID_SIZE); 987 BTRFS_FSID_SIZE);
969 btrfs_mark_buffer_dirty(root->node); 988 btrfs_mark_buffer_dirty(root->node);
970 btrfs_tree_unlock(root->node); 989 btrfs_tree_unlock(root->node);
971 fs_info->log_root_tree = root; 990 return root;
991}
992
993int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans,
994 struct btrfs_fs_info *fs_info)
995{
996 struct btrfs_root *log_root;
997
998 log_root = alloc_log_tree(trans, fs_info);
999 if (IS_ERR(log_root))
1000 return PTR_ERR(log_root);
1001 WARN_ON(fs_info->log_root_tree);
1002 fs_info->log_root_tree = log_root;
1003 return 0;
1004}
1005
1006int btrfs_add_log_tree(struct btrfs_trans_handle *trans,
1007 struct btrfs_root *root)
1008{
1009 struct btrfs_root *log_root;
1010 struct btrfs_inode_item *inode_item;
1011
1012 log_root = alloc_log_tree(trans, root->fs_info);
1013 if (IS_ERR(log_root))
1014 return PTR_ERR(log_root);
1015
1016 log_root->last_trans = trans->transid;
1017 log_root->root_key.offset = root->root_key.objectid;
1018
1019 inode_item = &log_root->root_item.inode;
1020 inode_item->generation = cpu_to_le64(1);
1021 inode_item->size = cpu_to_le64(3);
1022 inode_item->nlink = cpu_to_le32(1);
1023 inode_item->nbytes = cpu_to_le64(root->leafsize);
1024 inode_item->mode = cpu_to_le32(S_IFDIR | 0755);
1025
1026 btrfs_set_root_bytenr(&log_root->root_item, log_root->node->start);
1027 btrfs_set_root_generation(&log_root->root_item, trans->transid);
1028
1029 WARN_ON(root->log_root);
1030 root->log_root = log_root;
1031 root->log_transid = 0;
972 return 0; 1032 return 0;
973} 1033}
974 1034
@@ -1136,7 +1196,6 @@ static int btrfs_congested_fn(void *congested_data, int bdi_bits)
1136{ 1196{
1137 struct btrfs_fs_info *info = (struct btrfs_fs_info *)congested_data; 1197 struct btrfs_fs_info *info = (struct btrfs_fs_info *)congested_data;
1138 int ret = 0; 1198 int ret = 0;
1139 struct list_head *cur;
1140 struct btrfs_device *device; 1199 struct btrfs_device *device;
1141 struct backing_dev_info *bdi; 1200 struct backing_dev_info *bdi;
1142#if 0 1201#if 0
@@ -1144,8 +1203,7 @@ static int btrfs_congested_fn(void *congested_data, int bdi_bits)
1144 btrfs_congested_async(info, 0)) 1203 btrfs_congested_async(info, 0))
1145 return 1; 1204 return 1;
1146#endif 1205#endif
1147 list_for_each(cur, &info->fs_devices->devices) { 1206 list_for_each_entry(device, &info->fs_devices->devices, dev_list) {
1148 device = list_entry(cur, struct btrfs_device, dev_list);
1149 if (!device->bdev) 1207 if (!device->bdev)
1150 continue; 1208 continue;
1151 bdi = blk_get_backing_dev_info(device->bdev); 1209 bdi = blk_get_backing_dev_info(device->bdev);
@@ -1163,13 +1221,11 @@ static int btrfs_congested_fn(void *congested_data, int bdi_bits)
1163 */ 1221 */
1164static void __unplug_io_fn(struct backing_dev_info *bdi, struct page *page) 1222static void __unplug_io_fn(struct backing_dev_info *bdi, struct page *page)
1165{ 1223{
1166 struct list_head *cur;
1167 struct btrfs_device *device; 1224 struct btrfs_device *device;
1168 struct btrfs_fs_info *info; 1225 struct btrfs_fs_info *info;
1169 1226
1170 info = (struct btrfs_fs_info *)bdi->unplug_io_data; 1227 info = (struct btrfs_fs_info *)bdi->unplug_io_data;
1171 list_for_each(cur, &info->fs_devices->devices) { 1228 list_for_each_entry(device, &info->fs_devices->devices, dev_list) {
1172 device = list_entry(cur, struct btrfs_device, dev_list);
1173 if (!device->bdev) 1229 if (!device->bdev)
1174 continue; 1230 continue;
1175 1231
@@ -1535,10 +1591,6 @@ struct btrfs_root *open_ctree(struct super_block *sb,
1535 init_waitqueue_head(&fs_info->transaction_throttle); 1591 init_waitqueue_head(&fs_info->transaction_throttle);
1536 init_waitqueue_head(&fs_info->transaction_wait); 1592 init_waitqueue_head(&fs_info->transaction_wait);
1537 init_waitqueue_head(&fs_info->async_submit_wait); 1593 init_waitqueue_head(&fs_info->async_submit_wait);
1538 init_waitqueue_head(&fs_info->tree_log_wait);
1539 atomic_set(&fs_info->tree_log_commit, 0);
1540 atomic_set(&fs_info->tree_log_writers, 0);
1541 fs_info->tree_log_transid = 0;
1542 1594
1543 __setup_root(4096, 4096, 4096, 4096, tree_root, 1595 __setup_root(4096, 4096, 4096, 4096, tree_root,
1544 fs_info, BTRFS_ROOT_TREE_OBJECTID); 1596 fs_info, BTRFS_ROOT_TREE_OBJECTID);
@@ -1740,13 +1792,13 @@ struct btrfs_root *open_ctree(struct super_block *sb,
1740 fs_info->system_alloc_profile = fs_info->metadata_alloc_profile; 1792 fs_info->system_alloc_profile = fs_info->metadata_alloc_profile;
1741 fs_info->cleaner_kthread = kthread_run(cleaner_kthread, tree_root, 1793 fs_info->cleaner_kthread = kthread_run(cleaner_kthread, tree_root,
1742 "btrfs-cleaner"); 1794 "btrfs-cleaner");
1743 if (!fs_info->cleaner_kthread) 1795 if (IS_ERR(fs_info->cleaner_kthread))
1744 goto fail_csum_root; 1796 goto fail_csum_root;
1745 1797
1746 fs_info->transaction_kthread = kthread_run(transaction_kthread, 1798 fs_info->transaction_kthread = kthread_run(transaction_kthread,
1747 tree_root, 1799 tree_root,
1748 "btrfs-transaction"); 1800 "btrfs-transaction");
1749 if (!fs_info->transaction_kthread) 1801 if (IS_ERR(fs_info->transaction_kthread))
1750 goto fail_cleaner; 1802 goto fail_cleaner;
1751 1803
1752 if (btrfs_super_log_root(disk_super) != 0) { 1804 if (btrfs_super_log_root(disk_super) != 0) {
@@ -1828,13 +1880,14 @@ fail_sb_buffer:
1828fail_iput: 1880fail_iput:
1829 invalidate_inode_pages2(fs_info->btree_inode->i_mapping); 1881 invalidate_inode_pages2(fs_info->btree_inode->i_mapping);
1830 iput(fs_info->btree_inode); 1882 iput(fs_info->btree_inode);
1831fail: 1883
1832 btrfs_close_devices(fs_info->fs_devices); 1884 btrfs_close_devices(fs_info->fs_devices);
1833 btrfs_mapping_tree_free(&fs_info->mapping_tree); 1885 btrfs_mapping_tree_free(&fs_info->mapping_tree);
1886 bdi_destroy(&fs_info->bdi);
1834 1887
1888fail:
1835 kfree(extent_root); 1889 kfree(extent_root);
1836 kfree(tree_root); 1890 kfree(tree_root);
1837 bdi_destroy(&fs_info->bdi);
1838 kfree(fs_info); 1891 kfree(fs_info);
1839 kfree(chunk_root); 1892 kfree(chunk_root);
1840 kfree(dev_root); 1893 kfree(dev_root);
@@ -1995,7 +2048,6 @@ static int write_dev_supers(struct btrfs_device *device,
1995 2048
1996int write_all_supers(struct btrfs_root *root, int max_mirrors) 2049int write_all_supers(struct btrfs_root *root, int max_mirrors)
1997{ 2050{
1998 struct list_head *cur;
1999 struct list_head *head = &root->fs_info->fs_devices->devices; 2051 struct list_head *head = &root->fs_info->fs_devices->devices;
2000 struct btrfs_device *dev; 2052 struct btrfs_device *dev;
2001 struct btrfs_super_block *sb; 2053 struct btrfs_super_block *sb;
@@ -2011,8 +2063,7 @@ int write_all_supers(struct btrfs_root *root, int max_mirrors)
2011 2063
2012 sb = &root->fs_info->super_for_commit; 2064 sb = &root->fs_info->super_for_commit;
2013 dev_item = &sb->dev_item; 2065 dev_item = &sb->dev_item;
2014 list_for_each(cur, head) { 2066 list_for_each_entry(dev, head, dev_list) {
2015 dev = list_entry(cur, struct btrfs_device, dev_list);
2016 if (!dev->bdev) { 2067 if (!dev->bdev) {
2017 total_errors++; 2068 total_errors++;
2018 continue; 2069 continue;
@@ -2045,8 +2096,7 @@ int write_all_supers(struct btrfs_root *root, int max_mirrors)
2045 } 2096 }
2046 2097
2047 total_errors = 0; 2098 total_errors = 0;
2048 list_for_each(cur, head) { 2099 list_for_each_entry(dev, head, dev_list) {
2049 dev = list_entry(cur, struct btrfs_device, dev_list);
2050 if (!dev->bdev) 2100 if (!dev->bdev)
2051 continue; 2101 continue;
2052 if (!dev->in_fs_metadata || !dev->writeable) 2102 if (!dev->in_fs_metadata || !dev->writeable)
diff --git a/fs/btrfs/disk-io.h b/fs/btrfs/disk-io.h
index c0ff404c31b7..494a56eb2986 100644
--- a/fs/btrfs/disk-io.h
+++ b/fs/btrfs/disk-io.h
@@ -98,5 +98,7 @@ int btrfs_free_log_root_tree(struct btrfs_trans_handle *trans,
98 struct btrfs_fs_info *fs_info); 98 struct btrfs_fs_info *fs_info);
99int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans, 99int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans,
100 struct btrfs_fs_info *fs_info); 100 struct btrfs_fs_info *fs_info);
101int btrfs_add_log_tree(struct btrfs_trans_handle *trans,
102 struct btrfs_root *root);
101int btree_lock_page_hook(struct page *page); 103int btree_lock_page_hook(struct page *page);
102#endif 104#endif
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 293da650873f..3b26f0980946 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -19,7 +19,6 @@
19#include <linux/pagemap.h> 19#include <linux/pagemap.h>
20#include <linux/writeback.h> 20#include <linux/writeback.h>
21#include <linux/blkdev.h> 21#include <linux/blkdev.h>
22#include <linux/version.h>
23#include "compat.h" 22#include "compat.h"
24#include "hash.h" 23#include "hash.h"
25#include "crc32c.h" 24#include "crc32c.h"
@@ -30,7 +29,6 @@
30#include "volumes.h" 29#include "volumes.h"
31#include "locking.h" 30#include "locking.h"
32#include "ref-cache.h" 31#include "ref-cache.h"
33#include "compat.h"
34 32
35#define PENDING_EXTENT_INSERT 0 33#define PENDING_EXTENT_INSERT 0
36#define PENDING_EXTENT_DELETE 1 34#define PENDING_EXTENT_DELETE 1
@@ -326,10 +324,8 @@ static struct btrfs_space_info *__find_space_info(struct btrfs_fs_info *info,
326 u64 flags) 324 u64 flags)
327{ 325{
328 struct list_head *head = &info->space_info; 326 struct list_head *head = &info->space_info;
329 struct list_head *cur;
330 struct btrfs_space_info *found; 327 struct btrfs_space_info *found;
331 list_for_each(cur, head) { 328 list_for_each_entry(found, head, list) {
332 found = list_entry(cur, struct btrfs_space_info, list);
333 if (found->flags == flags) 329 if (found->flags == flags)
334 return found; 330 return found;
335 } 331 }
@@ -2159,7 +2155,8 @@ again:
2159 ret = find_first_extent_bit(&info->extent_ins, search, &start, 2155 ret = find_first_extent_bit(&info->extent_ins, search, &start,
2160 &end, EXTENT_WRITEBACK); 2156 &end, EXTENT_WRITEBACK);
2161 if (ret) { 2157 if (ret) {
2162 if (skipped && all && !num_inserts) { 2158 if (skipped && all && !num_inserts &&
2159 list_empty(&update_list)) {
2163 skipped = 0; 2160 skipped = 0;
2164 search = 0; 2161 search = 0;
2165 continue; 2162 continue;
@@ -2547,6 +2544,7 @@ again:
2547 if (ret) { 2544 if (ret) {
2548 if (all && skipped && !nr) { 2545 if (all && skipped && !nr) {
2549 search = 0; 2546 search = 0;
2547 skipped = 0;
2550 continue; 2548 continue;
2551 } 2549 }
2552 mutex_unlock(&info->extent_ins_mutex); 2550 mutex_unlock(&info->extent_ins_mutex);
@@ -2700,13 +2698,9 @@ static int __btrfs_free_extent(struct btrfs_trans_handle *trans,
2700 /* if metadata always pin */ 2698 /* if metadata always pin */
2701 if (owner_objectid < BTRFS_FIRST_FREE_OBJECTID) { 2699 if (owner_objectid < BTRFS_FIRST_FREE_OBJECTID) {
2702 if (root->root_key.objectid == BTRFS_TREE_LOG_OBJECTID) { 2700 if (root->root_key.objectid == BTRFS_TREE_LOG_OBJECTID) {
2703 struct btrfs_block_group_cache *cache; 2701 mutex_lock(&root->fs_info->pinned_mutex);
2704 2702 btrfs_update_pinned_extents(root, bytenr, num_bytes, 1);
2705 /* btrfs_free_reserved_extent */ 2703 mutex_unlock(&root->fs_info->pinned_mutex);
2706 cache = btrfs_lookup_block_group(root->fs_info, bytenr);
2707 BUG_ON(!cache);
2708 btrfs_add_free_space(cache, bytenr, num_bytes);
2709 put_block_group(cache);
2710 update_reserved_extents(root, bytenr, num_bytes, 0); 2704 update_reserved_extents(root, bytenr, num_bytes, 0);
2711 return 0; 2705 return 0;
2712 } 2706 }
@@ -3014,7 +3008,6 @@ loop_check:
3014static void dump_space_info(struct btrfs_space_info *info, u64 bytes) 3008static void dump_space_info(struct btrfs_space_info *info, u64 bytes)
3015{ 3009{
3016 struct btrfs_block_group_cache *cache; 3010 struct btrfs_block_group_cache *cache;
3017 struct list_head *l;
3018 3011
3019 printk(KERN_INFO "space_info has %llu free, is %sfull\n", 3012 printk(KERN_INFO "space_info has %llu free, is %sfull\n",
3020 (unsigned long long)(info->total_bytes - info->bytes_used - 3013 (unsigned long long)(info->total_bytes - info->bytes_used -
@@ -3022,8 +3015,7 @@ static void dump_space_info(struct btrfs_space_info *info, u64 bytes)
3022 (info->full) ? "" : "not "); 3015 (info->full) ? "" : "not ");
3023 3016
3024 down_read(&info->groups_sem); 3017 down_read(&info->groups_sem);
3025 list_for_each(l, &info->block_groups) { 3018 list_for_each_entry(cache, &info->block_groups, list) {
3026 cache = list_entry(l, struct btrfs_block_group_cache, list);
3027 spin_lock(&cache->lock); 3019 spin_lock(&cache->lock);
3028 printk(KERN_INFO "block group %llu has %llu bytes, %llu used " 3020 printk(KERN_INFO "block group %llu has %llu bytes, %llu used "
3029 "%llu pinned %llu reserved\n", 3021 "%llu pinned %llu reserved\n",
@@ -4444,7 +4436,7 @@ static noinline int replace_one_extent(struct btrfs_trans_handle *trans,
4444 u64 lock_end = 0; 4436 u64 lock_end = 0;
4445 u64 num_bytes; 4437 u64 num_bytes;
4446 u64 ext_offset; 4438 u64 ext_offset;
4447 u64 first_pos; 4439 u64 search_end = (u64)-1;
4448 u32 nritems; 4440 u32 nritems;
4449 int nr_scaned = 0; 4441 int nr_scaned = 0;
4450 int extent_locked = 0; 4442 int extent_locked = 0;
@@ -4452,7 +4444,6 @@ static noinline int replace_one_extent(struct btrfs_trans_handle *trans,
4452 int ret; 4444 int ret;
4453 4445
4454 memcpy(&key, leaf_key, sizeof(key)); 4446 memcpy(&key, leaf_key, sizeof(key));
4455 first_pos = INT_LIMIT(loff_t) - extent_key->offset;
4456 if (ref_path->owner_objectid != BTRFS_MULTIPLE_OBJECTIDS) { 4447 if (ref_path->owner_objectid != BTRFS_MULTIPLE_OBJECTIDS) {
4457 if (key.objectid < ref_path->owner_objectid || 4448 if (key.objectid < ref_path->owner_objectid ||
4458 (key.objectid == ref_path->owner_objectid && 4449 (key.objectid == ref_path->owner_objectid &&
@@ -4501,7 +4492,7 @@ next:
4501 if ((key.objectid > ref_path->owner_objectid) || 4492 if ((key.objectid > ref_path->owner_objectid) ||
4502 (key.objectid == ref_path->owner_objectid && 4493 (key.objectid == ref_path->owner_objectid &&
4503 key.type > BTRFS_EXTENT_DATA_KEY) || 4494 key.type > BTRFS_EXTENT_DATA_KEY) ||
4504 (key.offset >= first_pos + extent_key->offset)) 4495 key.offset >= search_end)
4505 break; 4496 break;
4506 } 4497 }
4507 4498
@@ -4534,8 +4525,10 @@ next:
4534 num_bytes = btrfs_file_extent_num_bytes(leaf, fi); 4525 num_bytes = btrfs_file_extent_num_bytes(leaf, fi);
4535 ext_offset = btrfs_file_extent_offset(leaf, fi); 4526 ext_offset = btrfs_file_extent_offset(leaf, fi);
4536 4527
4537 if (first_pos > key.offset - ext_offset) 4528 if (search_end == (u64)-1) {
4538 first_pos = key.offset - ext_offset; 4529 search_end = key.offset - ext_offset +
4530 btrfs_file_extent_ram_bytes(leaf, fi);
4531 }
4539 4532
4540 if (!extent_locked) { 4533 if (!extent_locked) {
4541 lock_start = key.offset; 4534 lock_start = key.offset;
@@ -4724,7 +4717,7 @@ next:
4724 } 4717 }
4725skip: 4718skip:
4726 if (ref_path->owner_objectid != BTRFS_MULTIPLE_OBJECTIDS && 4719 if (ref_path->owner_objectid != BTRFS_MULTIPLE_OBJECTIDS &&
4727 key.offset >= first_pos + extent_key->offset) 4720 key.offset >= search_end)
4728 break; 4721 break;
4729 4722
4730 cond_resched(); 4723 cond_resched();
@@ -5957,9 +5950,11 @@ int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
5957 path = btrfs_alloc_path(); 5950 path = btrfs_alloc_path();
5958 BUG_ON(!path); 5951 BUG_ON(!path);
5959 5952
5960 btrfs_remove_free_space_cache(block_group); 5953 spin_lock(&root->fs_info->block_group_cache_lock);
5961 rb_erase(&block_group->cache_node, 5954 rb_erase(&block_group->cache_node,
5962 &root->fs_info->block_group_cache_tree); 5955 &root->fs_info->block_group_cache_tree);
5956 spin_unlock(&root->fs_info->block_group_cache_lock);
5957 btrfs_remove_free_space_cache(block_group);
5963 down_write(&block_group->space_info->groups_sem); 5958 down_write(&block_group->space_info->groups_sem);
5964 list_del(&block_group->list); 5959 list_del(&block_group->list);
5965 up_write(&block_group->space_info->groups_sem); 5960 up_write(&block_group->space_info->groups_sem);
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index e086d407f1fa..a3b0676403f7 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -9,7 +9,6 @@
9#include <linux/spinlock.h> 9#include <linux/spinlock.h>
10#include <linux/blkdev.h> 10#include <linux/blkdev.h>
11#include <linux/swap.h> 11#include <linux/swap.h>
12#include <linux/version.h>
13#include <linux/writeback.h> 12#include <linux/writeback.h>
14#include <linux/pagevec.h> 13#include <linux/pagevec.h>
15#include "extent_io.h" 14#include "extent_io.h"
@@ -2855,6 +2854,98 @@ out:
2855 return sector; 2854 return sector;
2856} 2855}
2857 2856
2857int extent_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
2858 __u64 start, __u64 len, get_extent_t *get_extent)
2859{
2860 int ret;
2861 u64 off = start;
2862 u64 max = start + len;
2863 u32 flags = 0;
2864 u64 disko = 0;
2865 struct extent_map *em = NULL;
2866 int end = 0;
2867 u64 em_start = 0, em_len = 0;
2868 unsigned long emflags;
2869 ret = 0;
2870
2871 if (len == 0)
2872 return -EINVAL;
2873
2874 lock_extent(&BTRFS_I(inode)->io_tree, start, start + len,
2875 GFP_NOFS);
2876 em = get_extent(inode, NULL, 0, off, max - off, 0);
2877 if (!em)
2878 goto out;
2879 if (IS_ERR(em)) {
2880 ret = PTR_ERR(em);
2881 goto out;
2882 }
2883 while (!end) {
2884 off = em->start + em->len;
2885 if (off >= max)
2886 end = 1;
2887
2888 em_start = em->start;
2889 em_len = em->len;
2890
2891 disko = 0;
2892 flags = 0;
2893
2894 switch (em->block_start) {
2895 case EXTENT_MAP_LAST_BYTE:
2896 end = 1;
2897 flags |= FIEMAP_EXTENT_LAST;
2898 break;
2899 case EXTENT_MAP_HOLE:
2900 flags |= FIEMAP_EXTENT_UNWRITTEN;
2901 break;
2902 case EXTENT_MAP_INLINE:
2903 flags |= (FIEMAP_EXTENT_DATA_INLINE |
2904 FIEMAP_EXTENT_NOT_ALIGNED);
2905 break;
2906 case EXTENT_MAP_DELALLOC:
2907 flags |= (FIEMAP_EXTENT_DELALLOC |
2908 FIEMAP_EXTENT_UNKNOWN);
2909 break;
2910 default:
2911 disko = em->block_start;
2912 break;
2913 }
2914 if (test_bit(EXTENT_FLAG_COMPRESSED, &em->flags))
2915 flags |= FIEMAP_EXTENT_ENCODED;
2916
2917 emflags = em->flags;
2918 free_extent_map(em);
2919 em = NULL;
2920
2921 if (!end) {
2922 em = get_extent(inode, NULL, 0, off, max - off, 0);
2923 if (!em)
2924 goto out;
2925 if (IS_ERR(em)) {
2926 ret = PTR_ERR(em);
2927 goto out;
2928 }
2929 emflags = em->flags;
2930 }
2931 if (test_bit(EXTENT_FLAG_VACANCY, &emflags)) {
2932 flags |= FIEMAP_EXTENT_LAST;
2933 end = 1;
2934 }
2935
2936 ret = fiemap_fill_next_extent(fieinfo, em_start, disko,
2937 em_len, flags);
2938 if (ret)
2939 goto out_free;
2940 }
2941out_free:
2942 free_extent_map(em);
2943out:
2944 unlock_extent(&BTRFS_I(inode)->io_tree, start, start + len,
2945 GFP_NOFS);
2946 return ret;
2947}
2948
2858static inline struct page *extent_buffer_page(struct extent_buffer *eb, 2949static inline struct page *extent_buffer_page(struct extent_buffer *eb,
2859 unsigned long i) 2950 unsigned long i)
2860{ 2951{
diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h
index c5b483a79137..e80c6d96b318 100644
--- a/fs/btrfs/extent_io.h
+++ b/fs/btrfs/extent_io.h
@@ -193,6 +193,8 @@ int extent_commit_write(struct extent_io_tree *tree,
193 unsigned from, unsigned to); 193 unsigned from, unsigned to);
194sector_t extent_bmap(struct address_space *mapping, sector_t iblock, 194sector_t extent_bmap(struct address_space *mapping, sector_t iblock,
195 get_extent_t *get_extent); 195 get_extent_t *get_extent);
196int extent_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
197 __u64 start, __u64 len, get_extent_t *get_extent);
196int set_range_dirty(struct extent_io_tree *tree, u64 start, u64 end); 198int set_range_dirty(struct extent_io_tree *tree, u64 start, u64 end);
197int set_state_private(struct extent_io_tree *tree, u64 start, u64 private); 199int set_state_private(struct extent_io_tree *tree, u64 start, u64 private);
198int get_state_private(struct extent_io_tree *tree, u64 start, u64 *private); 200int get_state_private(struct extent_io_tree *tree, u64 start, u64 *private);
diff --git a/fs/btrfs/extent_map.c b/fs/btrfs/extent_map.c
index 4a83e33ada32..50da69da20ce 100644
--- a/fs/btrfs/extent_map.c
+++ b/fs/btrfs/extent_map.c
@@ -3,7 +3,6 @@
3#include <linux/slab.h> 3#include <linux/slab.h>
4#include <linux/module.h> 4#include <linux/module.h>
5#include <linux/spinlock.h> 5#include <linux/spinlock.h>
6#include <linux/version.h>
7#include <linux/hardirq.h> 6#include <linux/hardirq.h>
8#include "extent_map.h" 7#include "extent_map.h"
9 8
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 90268334145e..3e8023efaff7 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -29,7 +29,6 @@
29#include <linux/writeback.h> 29#include <linux/writeback.h>
30#include <linux/statfs.h> 30#include <linux/statfs.h>
31#include <linux/compat.h> 31#include <linux/compat.h>
32#include <linux/version.h>
33#include "ctree.h" 32#include "ctree.h"
34#include "disk-io.h" 33#include "disk-io.h"
35#include "transaction.h" 34#include "transaction.h"
@@ -1215,10 +1214,10 @@ int btrfs_sync_file(struct file *file, struct dentry *dentry, int datasync)
1215 } 1214 }
1216 mutex_unlock(&root->fs_info->trans_mutex); 1215 mutex_unlock(&root->fs_info->trans_mutex);
1217 1216
1218 root->fs_info->tree_log_batch++; 1217 root->log_batch++;
1219 filemap_fdatawrite(inode->i_mapping); 1218 filemap_fdatawrite(inode->i_mapping);
1220 btrfs_wait_ordered_range(inode, 0, (u64)-1); 1219 btrfs_wait_ordered_range(inode, 0, (u64)-1);
1221 root->fs_info->tree_log_batch++; 1220 root->log_batch++;
1222 1221
1223 /* 1222 /*
1224 * ok we haven't committed the transaction yet, lets do a commit 1223 * ok we haven't committed the transaction yet, lets do a commit
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 8adfe059ab41..288c2cdc7543 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -34,7 +34,6 @@
34#include <linux/statfs.h> 34#include <linux/statfs.h>
35#include <linux/compat.h> 35#include <linux/compat.h>
36#include <linux/bit_spinlock.h> 36#include <linux/bit_spinlock.h>
37#include <linux/version.h>
38#include <linux/xattr.h> 37#include <linux/xattr.h>
39#include <linux/posix_acl.h> 38#include <linux/posix_acl.h>
40#include <linux/falloc.h> 39#include <linux/falloc.h>
@@ -1324,12 +1323,11 @@ static noinline int add_pending_csums(struct btrfs_trans_handle *trans,
1324 struct inode *inode, u64 file_offset, 1323 struct inode *inode, u64 file_offset,
1325 struct list_head *list) 1324 struct list_head *list)
1326{ 1325{
1327 struct list_head *cur;
1328 struct btrfs_ordered_sum *sum; 1326 struct btrfs_ordered_sum *sum;
1329 1327
1330 btrfs_set_trans_block_group(trans, inode); 1328 btrfs_set_trans_block_group(trans, inode);
1331 list_for_each(cur, list) { 1329
1332 sum = list_entry(cur, struct btrfs_ordered_sum, list); 1330 list_for_each_entry(sum, list, list) {
1333 btrfs_csum_file_blocks(trans, 1331 btrfs_csum_file_blocks(trans,
1334 BTRFS_I(inode)->root->fs_info->csum_root, sum); 1332 BTRFS_I(inode)->root->fs_info->csum_root, sum);
1335 } 1333 }
@@ -4158,9 +4156,10 @@ static ssize_t btrfs_direct_IO(int rw, struct kiocb *iocb,
4158 return -EINVAL; 4156 return -EINVAL;
4159} 4157}
4160 4158
4161static sector_t btrfs_bmap(struct address_space *mapping, sector_t iblock) 4159static int btrfs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
4160 __u64 start, __u64 len)
4162{ 4161{
4163 return extent_bmap(mapping, iblock, btrfs_get_extent); 4162 return extent_fiemap(inode, fieinfo, start, len, btrfs_get_extent);
4164} 4163}
4165 4164
4166int btrfs_readpage(struct file *file, struct page *page) 4165int btrfs_readpage(struct file *file, struct page *page)
@@ -4987,13 +4986,24 @@ static struct extent_io_ops btrfs_extent_io_ops = {
4987 .clear_bit_hook = btrfs_clear_bit_hook, 4986 .clear_bit_hook = btrfs_clear_bit_hook,
4988}; 4987};
4989 4988
4989/*
4990 * btrfs doesn't support the bmap operation because swapfiles
4991 * use bmap to make a mapping of extents in the file. They assume
4992 * these extents won't change over the life of the file and they
4993 * use the bmap result to do IO directly to the drive.
4994 *
4995 * the btrfs bmap call would return logical addresses that aren't
4996 * suitable for IO and they also will change frequently as COW
4997 * operations happen. So, swapfile + btrfs == corruption.
4998 *
4999 * For now we're avoiding this by dropping bmap.
5000 */
4990static struct address_space_operations btrfs_aops = { 5001static struct address_space_operations btrfs_aops = {
4991 .readpage = btrfs_readpage, 5002 .readpage = btrfs_readpage,
4992 .writepage = btrfs_writepage, 5003 .writepage = btrfs_writepage,
4993 .writepages = btrfs_writepages, 5004 .writepages = btrfs_writepages,
4994 .readpages = btrfs_readpages, 5005 .readpages = btrfs_readpages,
4995 .sync_page = block_sync_page, 5006 .sync_page = block_sync_page,
4996 .bmap = btrfs_bmap,
4997 .direct_IO = btrfs_direct_IO, 5007 .direct_IO = btrfs_direct_IO,
4998 .invalidatepage = btrfs_invalidatepage, 5008 .invalidatepage = btrfs_invalidatepage,
4999 .releasepage = btrfs_releasepage, 5009 .releasepage = btrfs_releasepage,
@@ -5017,6 +5027,7 @@ static struct inode_operations btrfs_file_inode_operations = {
5017 .removexattr = btrfs_removexattr, 5027 .removexattr = btrfs_removexattr,
5018 .permission = btrfs_permission, 5028 .permission = btrfs_permission,
5019 .fallocate = btrfs_fallocate, 5029 .fallocate = btrfs_fallocate,
5030 .fiemap = btrfs_fiemap,
5020}; 5031};
5021static struct inode_operations btrfs_special_inode_operations = { 5032static struct inode_operations btrfs_special_inode_operations = {
5022 .getattr = btrfs_getattr, 5033 .getattr = btrfs_getattr,
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index c2aa33e3feb5..988fdc8b49eb 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -38,7 +38,6 @@
38#include <linux/compat.h> 38#include <linux/compat.h>
39#include <linux/bit_spinlock.h> 39#include <linux/bit_spinlock.h>
40#include <linux/security.h> 40#include <linux/security.h>
41#include <linux/version.h>
42#include <linux/xattr.h> 41#include <linux/xattr.h>
43#include <linux/vmalloc.h> 42#include <linux/vmalloc.h>
44#include "compat.h" 43#include "compat.h"
diff --git a/fs/btrfs/ordered-data.c b/fs/btrfs/ordered-data.c
index a20940170274..77c2411a5f0f 100644
--- a/fs/btrfs/ordered-data.c
+++ b/fs/btrfs/ordered-data.c
@@ -613,7 +613,6 @@ int btrfs_find_ordered_sum(struct inode *inode, u64 offset, u64 disk_bytenr,
613 struct btrfs_sector_sum *sector_sums; 613 struct btrfs_sector_sum *sector_sums;
614 struct btrfs_ordered_extent *ordered; 614 struct btrfs_ordered_extent *ordered;
615 struct btrfs_ordered_inode_tree *tree = &BTRFS_I(inode)->ordered_tree; 615 struct btrfs_ordered_inode_tree *tree = &BTRFS_I(inode)->ordered_tree;
616 struct list_head *cur;
617 unsigned long num_sectors; 616 unsigned long num_sectors;
618 unsigned long i; 617 unsigned long i;
619 u32 sectorsize = BTRFS_I(inode)->root->sectorsize; 618 u32 sectorsize = BTRFS_I(inode)->root->sectorsize;
@@ -624,8 +623,7 @@ int btrfs_find_ordered_sum(struct inode *inode, u64 offset, u64 disk_bytenr,
624 return 1; 623 return 1;
625 624
626 mutex_lock(&tree->mutex); 625 mutex_lock(&tree->mutex);
627 list_for_each_prev(cur, &ordered->list) { 626 list_for_each_entry_reverse(ordered_sum, &ordered->list, list) {
628 ordered_sum = list_entry(cur, struct btrfs_ordered_sum, list);
629 if (disk_bytenr >= ordered_sum->bytenr) { 627 if (disk_bytenr >= ordered_sum->bytenr) {
630 num_sectors = ordered_sum->len / sectorsize; 628 num_sectors = ordered_sum->len / sectorsize;
631 sector_sums = ordered_sum->sums; 629 sector_sums = ordered_sum->sums;
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index db9fb3bc1e33..f3fd7e2cbc38 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -37,7 +37,6 @@
37#include <linux/ctype.h> 37#include <linux/ctype.h>
38#include <linux/namei.h> 38#include <linux/namei.h>
39#include <linux/miscdevice.h> 39#include <linux/miscdevice.h>
40#include <linux/version.h>
41#include <linux/magic.h> 40#include <linux/magic.h>
42#include "compat.h" 41#include "compat.h"
43#include "ctree.h" 42#include "ctree.h"
@@ -583,17 +582,18 @@ static long btrfs_control_ioctl(struct file *file, unsigned int cmd,
583 struct btrfs_ioctl_vol_args *vol; 582 struct btrfs_ioctl_vol_args *vol;
584 struct btrfs_fs_devices *fs_devices; 583 struct btrfs_fs_devices *fs_devices;
585 int ret = -ENOTTY; 584 int ret = -ENOTTY;
586 int len;
587 585
588 if (!capable(CAP_SYS_ADMIN)) 586 if (!capable(CAP_SYS_ADMIN))
589 return -EPERM; 587 return -EPERM;
590 588
591 vol = kmalloc(sizeof(*vol), GFP_KERNEL); 589 vol = kmalloc(sizeof(*vol), GFP_KERNEL);
590 if (!vol)
591 return -ENOMEM;
592
592 if (copy_from_user(vol, (void __user *)arg, sizeof(*vol))) { 593 if (copy_from_user(vol, (void __user *)arg, sizeof(*vol))) {
593 ret = -EFAULT; 594 ret = -EFAULT;
594 goto out; 595 goto out;
595 } 596 }
596 len = strnlen(vol->name, BTRFS_PATH_NAME_MAX);
597 597
598 switch (cmd) { 598 switch (cmd) {
599 case BTRFS_IOC_SCAN_DEV: 599 case BTRFS_IOC_SCAN_DEV:
diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index 8a08f9443340..919172de5c9a 100644
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -852,11 +852,9 @@ static noinline int create_pending_snapshots(struct btrfs_trans_handle *trans,
852{ 852{
853 struct btrfs_pending_snapshot *pending; 853 struct btrfs_pending_snapshot *pending;
854 struct list_head *head = &trans->transaction->pending_snapshots; 854 struct list_head *head = &trans->transaction->pending_snapshots;
855 struct list_head *cur;
856 int ret; 855 int ret;
857 856
858 list_for_each(cur, head) { 857 list_for_each_entry(pending, head, list) {
859 pending = list_entry(cur, struct btrfs_pending_snapshot, list);
860 ret = create_pending_snapshot(trans, fs_info, pending); 858 ret = create_pending_snapshot(trans, fs_info, pending);
861 BUG_ON(ret); 859 BUG_ON(ret);
862 } 860 }
diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c
index d81cda2e077c..4f26f3ed0c87 100644
--- a/fs/btrfs/tree-log.c
+++ b/fs/btrfs/tree-log.c
@@ -78,104 +78,6 @@ static int link_to_fixup_dir(struct btrfs_trans_handle *trans,
78 */ 78 */
79 79
80/* 80/*
81 * btrfs_add_log_tree adds a new per-subvolume log tree into the
82 * tree of log tree roots. This must be called with a tree log transaction
83 * running (see start_log_trans).
84 */
85static int btrfs_add_log_tree(struct btrfs_trans_handle *trans,
86 struct btrfs_root *root)
87{
88 struct btrfs_key key;
89 struct btrfs_root_item root_item;
90 struct btrfs_inode_item *inode_item;
91 struct extent_buffer *leaf;
92 struct btrfs_root *new_root = root;
93 int ret;
94 u64 objectid = root->root_key.objectid;
95
96 leaf = btrfs_alloc_free_block(trans, root, root->leafsize, 0,
97 BTRFS_TREE_LOG_OBJECTID,
98 trans->transid, 0, 0, 0);
99 if (IS_ERR(leaf)) {
100 ret = PTR_ERR(leaf);
101 return ret;
102 }
103
104 btrfs_set_header_nritems(leaf, 0);
105 btrfs_set_header_level(leaf, 0);
106 btrfs_set_header_bytenr(leaf, leaf->start);
107 btrfs_set_header_generation(leaf, trans->transid);
108 btrfs_set_header_owner(leaf, BTRFS_TREE_LOG_OBJECTID);
109
110 write_extent_buffer(leaf, root->fs_info->fsid,
111 (unsigned long)btrfs_header_fsid(leaf),
112 BTRFS_FSID_SIZE);
113 btrfs_mark_buffer_dirty(leaf);
114
115 inode_item = &root_item.inode;
116 memset(inode_item, 0, sizeof(*inode_item));
117 inode_item->generation = cpu_to_le64(1);
118 inode_item->size = cpu_to_le64(3);
119 inode_item->nlink = cpu_to_le32(1);
120 inode_item->nbytes = cpu_to_le64(root->leafsize);
121 inode_item->mode = cpu_to_le32(S_IFDIR | 0755);
122
123 btrfs_set_root_bytenr(&root_item, leaf->start);
124 btrfs_set_root_generation(&root_item, trans->transid);
125 btrfs_set_root_level(&root_item, 0);
126 btrfs_set_root_refs(&root_item, 0);
127 btrfs_set_root_used(&root_item, 0);
128
129 memset(&root_item.drop_progress, 0, sizeof(root_item.drop_progress));
130 root_item.drop_level = 0;
131
132 btrfs_tree_unlock(leaf);
133 free_extent_buffer(leaf);
134 leaf = NULL;
135
136 btrfs_set_root_dirid(&root_item, 0);
137
138 key.objectid = BTRFS_TREE_LOG_OBJECTID;
139 key.offset = objectid;
140 btrfs_set_key_type(&key, BTRFS_ROOT_ITEM_KEY);
141 ret = btrfs_insert_root(trans, root->fs_info->log_root_tree, &key,
142 &root_item);
143 if (ret)
144 goto fail;
145
146 new_root = btrfs_read_fs_root_no_radix(root->fs_info->log_root_tree,
147 &key);
148 BUG_ON(!new_root);
149
150 WARN_ON(root->log_root);
151 root->log_root = new_root;
152
153 /*
154 * log trees do not get reference counted because they go away
155 * before a real commit is actually done. They do store pointers
156 * to file data extents, and those reference counts still get
157 * updated (along with back refs to the log tree).
158 */
159 new_root->ref_cows = 0;
160 new_root->last_trans = trans->transid;
161
162 /*
163 * we need to make sure the root block for this new tree
164 * is marked as dirty in the dirty_log_pages tree. This
165 * is how it gets flushed down to disk at tree log commit time.
166 *
167 * the tree logging mutex keeps others from coming in and changing
168 * the new_root->node, so we can safely access it here
169 */
170 set_extent_dirty(&new_root->dirty_log_pages, new_root->node->start,
171 new_root->node->start + new_root->node->len - 1,
172 GFP_NOFS);
173
174fail:
175 return ret;
176}
177
178/*
179 * start a sub transaction and setup the log tree 81 * start a sub transaction and setup the log tree
180 * this increments the log tree writer count to make the people 82 * this increments the log tree writer count to make the people
181 * syncing the tree wait for us to finish 83 * syncing the tree wait for us to finish
@@ -184,6 +86,14 @@ static int start_log_trans(struct btrfs_trans_handle *trans,
184 struct btrfs_root *root) 86 struct btrfs_root *root)
185{ 87{
186 int ret; 88 int ret;
89
90 mutex_lock(&root->log_mutex);
91 if (root->log_root) {
92 root->log_batch++;
93 atomic_inc(&root->log_writers);
94 mutex_unlock(&root->log_mutex);
95 return 0;
96 }
187 mutex_lock(&root->fs_info->tree_log_mutex); 97 mutex_lock(&root->fs_info->tree_log_mutex);
188 if (!root->fs_info->log_root_tree) { 98 if (!root->fs_info->log_root_tree) {
189 ret = btrfs_init_log_root_tree(trans, root->fs_info); 99 ret = btrfs_init_log_root_tree(trans, root->fs_info);
@@ -193,9 +103,10 @@ static int start_log_trans(struct btrfs_trans_handle *trans,
193 ret = btrfs_add_log_tree(trans, root); 103 ret = btrfs_add_log_tree(trans, root);
194 BUG_ON(ret); 104 BUG_ON(ret);
195 } 105 }
196 atomic_inc(&root->fs_info->tree_log_writers);
197 root->fs_info->tree_log_batch++;
198 mutex_unlock(&root->fs_info->tree_log_mutex); 106 mutex_unlock(&root->fs_info->tree_log_mutex);
107 root->log_batch++;
108 atomic_inc(&root->log_writers);
109 mutex_unlock(&root->log_mutex);
199 return 0; 110 return 0;
200} 111}
201 112
@@ -212,13 +123,12 @@ static int join_running_log_trans(struct btrfs_root *root)
212 if (!root->log_root) 123 if (!root->log_root)
213 return -ENOENT; 124 return -ENOENT;
214 125
215 mutex_lock(&root->fs_info->tree_log_mutex); 126 mutex_lock(&root->log_mutex);
216 if (root->log_root) { 127 if (root->log_root) {
217 ret = 0; 128 ret = 0;
218 atomic_inc(&root->fs_info->tree_log_writers); 129 atomic_inc(&root->log_writers);
219 root->fs_info->tree_log_batch++;
220 } 130 }
221 mutex_unlock(&root->fs_info->tree_log_mutex); 131 mutex_unlock(&root->log_mutex);
222 return ret; 132 return ret;
223} 133}
224 134
@@ -228,10 +138,11 @@ static int join_running_log_trans(struct btrfs_root *root)
228 */ 138 */
229static int end_log_trans(struct btrfs_root *root) 139static int end_log_trans(struct btrfs_root *root)
230{ 140{
231 atomic_dec(&root->fs_info->tree_log_writers); 141 if (atomic_dec_and_test(&root->log_writers)) {
232 smp_mb(); 142 smp_mb();
233 if (waitqueue_active(&root->fs_info->tree_log_wait)) 143 if (waitqueue_active(&root->log_writer_wait))
234 wake_up(&root->fs_info->tree_log_wait); 144 wake_up(&root->log_writer_wait);
145 }
235 return 0; 146 return 0;
236} 147}
237 148
@@ -1902,26 +1813,65 @@ static int walk_log_tree(struct btrfs_trans_handle *trans,
1902 } 1813 }
1903 } 1814 }
1904 btrfs_free_path(path); 1815 btrfs_free_path(path);
1905 if (wc->free)
1906 free_extent_buffer(log->node);
1907 return ret; 1816 return ret;
1908} 1817}
1909 1818
1910static int wait_log_commit(struct btrfs_root *log) 1819/*
1820 * helper function to update the item for a given subvolumes log root
1821 * in the tree of log roots
1822 */
1823static int update_log_root(struct btrfs_trans_handle *trans,
1824 struct btrfs_root *log)
1825{
1826 int ret;
1827
1828 if (log->log_transid == 1) {
1829 /* insert root item on the first sync */
1830 ret = btrfs_insert_root(trans, log->fs_info->log_root_tree,
1831 &log->root_key, &log->root_item);
1832 } else {
1833 ret = btrfs_update_root(trans, log->fs_info->log_root_tree,
1834 &log->root_key, &log->root_item);
1835 }
1836 return ret;
1837}
1838
1839static int wait_log_commit(struct btrfs_root *root, unsigned long transid)
1911{ 1840{
1912 DEFINE_WAIT(wait); 1841 DEFINE_WAIT(wait);
1913 u64 transid = log->fs_info->tree_log_transid; 1842 int index = transid % 2;
1914 1843
1844 /*
1845 * we only allow two pending log transactions at a time,
1846 * so we know that if ours is more than 2 older than the
1847 * current transaction, we're done
1848 */
1915 do { 1849 do {
1916 prepare_to_wait(&log->fs_info->tree_log_wait, &wait, 1850 prepare_to_wait(&root->log_commit_wait[index],
1917 TASK_UNINTERRUPTIBLE); 1851 &wait, TASK_UNINTERRUPTIBLE);
1918 mutex_unlock(&log->fs_info->tree_log_mutex); 1852 mutex_unlock(&root->log_mutex);
1919 if (atomic_read(&log->fs_info->tree_log_commit)) 1853 if (root->log_transid < transid + 2 &&
1854 atomic_read(&root->log_commit[index]))
1920 schedule(); 1855 schedule();
1921 finish_wait(&log->fs_info->tree_log_wait, &wait); 1856 finish_wait(&root->log_commit_wait[index], &wait);
1922 mutex_lock(&log->fs_info->tree_log_mutex); 1857 mutex_lock(&root->log_mutex);
1923 } while (transid == log->fs_info->tree_log_transid && 1858 } while (root->log_transid < transid + 2 &&
1924 atomic_read(&log->fs_info->tree_log_commit)); 1859 atomic_read(&root->log_commit[index]));
1860 return 0;
1861}
1862
1863static int wait_for_writer(struct btrfs_root *root)
1864{
1865 DEFINE_WAIT(wait);
1866 while (atomic_read(&root->log_writers)) {
1867 prepare_to_wait(&root->log_writer_wait,
1868 &wait, TASK_UNINTERRUPTIBLE);
1869 mutex_unlock(&root->log_mutex);
1870 if (atomic_read(&root->log_writers))
1871 schedule();
1872 mutex_lock(&root->log_mutex);
1873 finish_wait(&root->log_writer_wait, &wait);
1874 }
1925 return 0; 1875 return 0;
1926} 1876}
1927 1877
@@ -1933,57 +1883,114 @@ static int wait_log_commit(struct btrfs_root *log)
1933int btrfs_sync_log(struct btrfs_trans_handle *trans, 1883int btrfs_sync_log(struct btrfs_trans_handle *trans,
1934 struct btrfs_root *root) 1884 struct btrfs_root *root)
1935{ 1885{
1886 int index1;
1887 int index2;
1936 int ret; 1888 int ret;
1937 unsigned long batch;
1938 struct btrfs_root *log = root->log_root; 1889 struct btrfs_root *log = root->log_root;
1890 struct btrfs_root *log_root_tree = root->fs_info->log_root_tree;
1939 1891
1940 mutex_lock(&log->fs_info->tree_log_mutex); 1892 mutex_lock(&root->log_mutex);
1941 if (atomic_read(&log->fs_info->tree_log_commit)) { 1893 index1 = root->log_transid % 2;
1942 wait_log_commit(log); 1894 if (atomic_read(&root->log_commit[index1])) {
1943 goto out; 1895 wait_log_commit(root, root->log_transid);
1896 mutex_unlock(&root->log_mutex);
1897 return 0;
1944 } 1898 }
1945 atomic_set(&log->fs_info->tree_log_commit, 1); 1899 atomic_set(&root->log_commit[index1], 1);
1900
1901 /* wait for previous tree log sync to complete */
1902 if (atomic_read(&root->log_commit[(index1 + 1) % 2]))
1903 wait_log_commit(root, root->log_transid - 1);
1946 1904
1947 while (1) { 1905 while (1) {
1948 batch = log->fs_info->tree_log_batch; 1906 unsigned long batch = root->log_batch;
1949 mutex_unlock(&log->fs_info->tree_log_mutex); 1907 mutex_unlock(&root->log_mutex);
1950 schedule_timeout_uninterruptible(1); 1908 schedule_timeout_uninterruptible(1);
1951 mutex_lock(&log->fs_info->tree_log_mutex); 1909 mutex_lock(&root->log_mutex);
1952 1910 wait_for_writer(root);
1953 while (atomic_read(&log->fs_info->tree_log_writers)) { 1911 if (batch == root->log_batch)
1954 DEFINE_WAIT(wait);
1955 prepare_to_wait(&log->fs_info->tree_log_wait, &wait,
1956 TASK_UNINTERRUPTIBLE);
1957 mutex_unlock(&log->fs_info->tree_log_mutex);
1958 if (atomic_read(&log->fs_info->tree_log_writers))
1959 schedule();
1960 mutex_lock(&log->fs_info->tree_log_mutex);
1961 finish_wait(&log->fs_info->tree_log_wait, &wait);
1962 }
1963 if (batch == log->fs_info->tree_log_batch)
1964 break; 1912 break;
1965 } 1913 }
1966 1914
1967 ret = btrfs_write_and_wait_marked_extents(log, &log->dirty_log_pages); 1915 ret = btrfs_write_and_wait_marked_extents(log, &log->dirty_log_pages);
1968 BUG_ON(ret); 1916 BUG_ON(ret);
1969 ret = btrfs_write_and_wait_marked_extents(root->fs_info->log_root_tree, 1917
1970 &root->fs_info->log_root_tree->dirty_log_pages); 1918 btrfs_set_root_bytenr(&log->root_item, log->node->start);
1919 btrfs_set_root_generation(&log->root_item, trans->transid);
1920 btrfs_set_root_level(&log->root_item, btrfs_header_level(log->node));
1921
1922 root->log_batch = 0;
1923 root->log_transid++;
1924 log->log_transid = root->log_transid;
1925 smp_mb();
1926 /*
1927 * log tree has been flushed to disk, new modifications of
1928 * the log will be written to new positions. so it's safe to
1929 * allow log writers to go in.
1930 */
1931 mutex_unlock(&root->log_mutex);
1932
1933 mutex_lock(&log_root_tree->log_mutex);
1934 log_root_tree->log_batch++;
1935 atomic_inc(&log_root_tree->log_writers);
1936 mutex_unlock(&log_root_tree->log_mutex);
1937
1938 ret = update_log_root(trans, log);
1939 BUG_ON(ret);
1940
1941 mutex_lock(&log_root_tree->log_mutex);
1942 if (atomic_dec_and_test(&log_root_tree->log_writers)) {
1943 smp_mb();
1944 if (waitqueue_active(&log_root_tree->log_writer_wait))
1945 wake_up(&log_root_tree->log_writer_wait);
1946 }
1947
1948 index2 = log_root_tree->log_transid % 2;
1949 if (atomic_read(&log_root_tree->log_commit[index2])) {
1950 wait_log_commit(log_root_tree, log_root_tree->log_transid);
1951 mutex_unlock(&log_root_tree->log_mutex);
1952 goto out;
1953 }
1954 atomic_set(&log_root_tree->log_commit[index2], 1);
1955
1956 if (atomic_read(&log_root_tree->log_commit[(index2 + 1) % 2]))
1957 wait_log_commit(log_root_tree, log_root_tree->log_transid - 1);
1958
1959 wait_for_writer(log_root_tree);
1960
1961 ret = btrfs_write_and_wait_marked_extents(log_root_tree,
1962 &log_root_tree->dirty_log_pages);
1971 BUG_ON(ret); 1963 BUG_ON(ret);
1972 1964
1973 btrfs_set_super_log_root(&root->fs_info->super_for_commit, 1965 btrfs_set_super_log_root(&root->fs_info->super_for_commit,
1974 log->fs_info->log_root_tree->node->start); 1966 log_root_tree->node->start);
1975 btrfs_set_super_log_root_level(&root->fs_info->super_for_commit, 1967 btrfs_set_super_log_root_level(&root->fs_info->super_for_commit,
1976 btrfs_header_level(log->fs_info->log_root_tree->node)); 1968 btrfs_header_level(log_root_tree->node));
1969
1970 log_root_tree->log_batch = 0;
1971 log_root_tree->log_transid++;
1972 smp_mb();
1973
1974 mutex_unlock(&log_root_tree->log_mutex);
1975
1976 /*
1977 * nobody else is going to jump in and write the the ctree
1978 * super here because the log_commit atomic below is protecting
1979 * us. We must be called with a transaction handle pinning
1980 * the running transaction open, so a full commit can't hop
1981 * in and cause problems either.
1982 */
1983 write_ctree_super(trans, root->fs_info->tree_root, 2);
1977 1984
1978 write_ctree_super(trans, log->fs_info->tree_root, 2); 1985 atomic_set(&log_root_tree->log_commit[index2], 0);
1979 log->fs_info->tree_log_transid++;
1980 log->fs_info->tree_log_batch = 0;
1981 atomic_set(&log->fs_info->tree_log_commit, 0);
1982 smp_mb(); 1986 smp_mb();
1983 if (waitqueue_active(&log->fs_info->tree_log_wait)) 1987 if (waitqueue_active(&log_root_tree->log_commit_wait[index2]))
1984 wake_up(&log->fs_info->tree_log_wait); 1988 wake_up(&log_root_tree->log_commit_wait[index2]);
1985out: 1989out:
1986 mutex_unlock(&log->fs_info->tree_log_mutex); 1990 atomic_set(&root->log_commit[index1], 0);
1991 smp_mb();
1992 if (waitqueue_active(&root->log_commit_wait[index1]))
1993 wake_up(&root->log_commit_wait[index1]);
1987 return 0; 1994 return 0;
1988} 1995}
1989 1996
@@ -2019,38 +2026,18 @@ int btrfs_free_log(struct btrfs_trans_handle *trans, struct btrfs_root *root)
2019 start, end, GFP_NOFS); 2026 start, end, GFP_NOFS);
2020 } 2027 }
2021 2028
2022 log = root->log_root; 2029 if (log->log_transid > 0) {
2023 ret = btrfs_del_root(trans, root->fs_info->log_root_tree, 2030 ret = btrfs_del_root(trans, root->fs_info->log_root_tree,
2024 &log->root_key); 2031 &log->root_key);
2025 BUG_ON(ret); 2032 BUG_ON(ret);
2033 }
2026 root->log_root = NULL; 2034 root->log_root = NULL;
2027 kfree(root->log_root); 2035 free_extent_buffer(log->node);
2036 kfree(log);
2028 return 0; 2037 return 0;
2029} 2038}
2030 2039
2031/* 2040/*
2032 * helper function to update the item for a given subvolumes log root
2033 * in the tree of log roots
2034 */
2035static int update_log_root(struct btrfs_trans_handle *trans,
2036 struct btrfs_root *log)
2037{
2038 u64 bytenr = btrfs_root_bytenr(&log->root_item);
2039 int ret;
2040
2041 if (log->node->start == bytenr)
2042 return 0;
2043
2044 btrfs_set_root_bytenr(&log->root_item, log->node->start);
2045 btrfs_set_root_generation(&log->root_item, trans->transid);
2046 btrfs_set_root_level(&log->root_item, btrfs_header_level(log->node));
2047 ret = btrfs_update_root(trans, log->fs_info->log_root_tree,
2048 &log->root_key, &log->root_item);
2049 BUG_ON(ret);
2050 return ret;
2051}
2052
2053/*
2054 * If both a file and directory are logged, and unlinks or renames are 2041 * If both a file and directory are logged, and unlinks or renames are
2055 * mixed in, we have a few interesting corners: 2042 * mixed in, we have a few interesting corners:
2056 * 2043 *
@@ -2711,11 +2698,6 @@ next_slot:
2711 2698
2712 btrfs_free_path(path); 2699 btrfs_free_path(path);
2713 btrfs_free_path(dst_path); 2700 btrfs_free_path(dst_path);
2714
2715 mutex_lock(&root->fs_info->tree_log_mutex);
2716 ret = update_log_root(trans, log);
2717 BUG_ON(ret);
2718 mutex_unlock(&root->fs_info->tree_log_mutex);
2719out: 2701out:
2720 return 0; 2702 return 0;
2721} 2703}
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 3451e1cca2b5..fd0bedb07a64 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -20,7 +20,6 @@
20#include <linux/buffer_head.h> 20#include <linux/buffer_head.h>
21#include <linux/blkdev.h> 21#include <linux/blkdev.h>
22#include <linux/random.h> 22#include <linux/random.h>
23#include <linux/version.h>
24#include <asm/div64.h> 23#include <asm/div64.h>
25#include "compat.h" 24#include "compat.h"
26#include "ctree.h" 25#include "ctree.h"
@@ -104,10 +103,8 @@ static noinline struct btrfs_device *__find_device(struct list_head *head,
104 u64 devid, u8 *uuid) 103 u64 devid, u8 *uuid)
105{ 104{
106 struct btrfs_device *dev; 105 struct btrfs_device *dev;
107 struct list_head *cur;
108 106
109 list_for_each(cur, head) { 107 list_for_each_entry(dev, head, dev_list) {
110 dev = list_entry(cur, struct btrfs_device, dev_list);
111 if (dev->devid == devid && 108 if (dev->devid == devid &&
112 (!uuid || !memcmp(dev->uuid, uuid, BTRFS_UUID_SIZE))) { 109 (!uuid || !memcmp(dev->uuid, uuid, BTRFS_UUID_SIZE))) {
113 return dev; 110 return dev;
@@ -118,11 +115,9 @@ static noinline struct btrfs_device *__find_device(struct list_head *head,
118 115
119static noinline struct btrfs_fs_devices *find_fsid(u8 *fsid) 116static noinline struct btrfs_fs_devices *find_fsid(u8 *fsid)
120{ 117{
121 struct list_head *cur;
122 struct btrfs_fs_devices *fs_devices; 118 struct btrfs_fs_devices *fs_devices;
123 119
124 list_for_each(cur, &fs_uuids) { 120 list_for_each_entry(fs_devices, &fs_uuids, list) {
125 fs_devices = list_entry(cur, struct btrfs_fs_devices, list);
126 if (memcmp(fsid, fs_devices->fsid, BTRFS_FSID_SIZE) == 0) 121 if (memcmp(fsid, fs_devices->fsid, BTRFS_FSID_SIZE) == 0)
127 return fs_devices; 122 return fs_devices;
128 } 123 }
@@ -345,14 +340,11 @@ error:
345 340
346int btrfs_close_extra_devices(struct btrfs_fs_devices *fs_devices) 341int btrfs_close_extra_devices(struct btrfs_fs_devices *fs_devices)
347{ 342{
348 struct list_head *tmp; 343 struct btrfs_device *device, *next;
349 struct list_head *cur;
350 struct btrfs_device *device;
351 344
352 mutex_lock(&uuid_mutex); 345 mutex_lock(&uuid_mutex);
353again: 346again:
354 list_for_each_safe(cur, tmp, &fs_devices->devices) { 347 list_for_each_entry_safe(device, next, &fs_devices->devices, dev_list) {
355 device = list_entry(cur, struct btrfs_device, dev_list);
356 if (device->in_fs_metadata) 348 if (device->in_fs_metadata)
357 continue; 349 continue;
358 350
@@ -383,14 +375,12 @@ again:
383 375
384static int __btrfs_close_devices(struct btrfs_fs_devices *fs_devices) 376static int __btrfs_close_devices(struct btrfs_fs_devices *fs_devices)
385{ 377{
386 struct list_head *cur;
387 struct btrfs_device *device; 378 struct btrfs_device *device;
388 379
389 if (--fs_devices->opened > 0) 380 if (--fs_devices->opened > 0)
390 return 0; 381 return 0;
391 382
392 list_for_each(cur, &fs_devices->devices) { 383 list_for_each_entry(device, &fs_devices->devices, dev_list) {
393 device = list_entry(cur, struct btrfs_device, dev_list);
394 if (device->bdev) { 384 if (device->bdev) {
395 close_bdev_exclusive(device->bdev, device->mode); 385 close_bdev_exclusive(device->bdev, device->mode);
396 fs_devices->open_devices--; 386 fs_devices->open_devices--;
@@ -439,7 +429,6 @@ static int __btrfs_open_devices(struct btrfs_fs_devices *fs_devices,
439{ 429{
440 struct block_device *bdev; 430 struct block_device *bdev;
441 struct list_head *head = &fs_devices->devices; 431 struct list_head *head = &fs_devices->devices;
442 struct list_head *cur;
443 struct btrfs_device *device; 432 struct btrfs_device *device;
444 struct block_device *latest_bdev = NULL; 433 struct block_device *latest_bdev = NULL;
445 struct buffer_head *bh; 434 struct buffer_head *bh;
@@ -450,8 +439,7 @@ static int __btrfs_open_devices(struct btrfs_fs_devices *fs_devices,
450 int seeding = 1; 439 int seeding = 1;
451 int ret = 0; 440 int ret = 0;
452 441
453 list_for_each(cur, head) { 442 list_for_each_entry(device, head, dev_list) {
454 device = list_entry(cur, struct btrfs_device, dev_list);
455 if (device->bdev) 443 if (device->bdev)
456 continue; 444 continue;
457 if (!device->name) 445 if (!device->name)
@@ -578,7 +566,7 @@ int btrfs_scan_one_device(const char *path, fmode_t flags, void *holder,
578 *(unsigned long long *)disk_super->fsid, 566 *(unsigned long long *)disk_super->fsid,
579 *(unsigned long long *)(disk_super->fsid + 8)); 567 *(unsigned long long *)(disk_super->fsid + 8));
580 } 568 }
581 printk(KERN_INFO "devid %llu transid %llu %s\n", 569 printk(KERN_CONT "devid %llu transid %llu %s\n",
582 (unsigned long long)devid, (unsigned long long)transid, path); 570 (unsigned long long)devid, (unsigned long long)transid, path);
583 ret = device_list_add(path, disk_super, devid, fs_devices_ret); 571 ret = device_list_add(path, disk_super, devid, fs_devices_ret);
584 572
@@ -1017,14 +1005,12 @@ int btrfs_rm_device(struct btrfs_root *root, char *device_path)
1017 } 1005 }
1018 1006
1019 if (strcmp(device_path, "missing") == 0) { 1007 if (strcmp(device_path, "missing") == 0) {
1020 struct list_head *cur;
1021 struct list_head *devices; 1008 struct list_head *devices;
1022 struct btrfs_device *tmp; 1009 struct btrfs_device *tmp;
1023 1010
1024 device = NULL; 1011 device = NULL;
1025 devices = &root->fs_info->fs_devices->devices; 1012 devices = &root->fs_info->fs_devices->devices;
1026 list_for_each(cur, devices) { 1013 list_for_each_entry(tmp, devices, dev_list) {
1027 tmp = list_entry(cur, struct btrfs_device, dev_list);
1028 if (tmp->in_fs_metadata && !tmp->bdev) { 1014 if (tmp->in_fs_metadata && !tmp->bdev) {
1029 device = tmp; 1015 device = tmp;
1030 break; 1016 break;
@@ -1280,7 +1266,6 @@ int btrfs_init_new_device(struct btrfs_root *root, char *device_path)
1280 struct btrfs_trans_handle *trans; 1266 struct btrfs_trans_handle *trans;
1281 struct btrfs_device *device; 1267 struct btrfs_device *device;
1282 struct block_device *bdev; 1268 struct block_device *bdev;
1283 struct list_head *cur;
1284 struct list_head *devices; 1269 struct list_head *devices;
1285 struct super_block *sb = root->fs_info->sb; 1270 struct super_block *sb = root->fs_info->sb;
1286 u64 total_bytes; 1271 u64 total_bytes;
@@ -1304,8 +1289,7 @@ int btrfs_init_new_device(struct btrfs_root *root, char *device_path)
1304 mutex_lock(&root->fs_info->volume_mutex); 1289 mutex_lock(&root->fs_info->volume_mutex);
1305 1290
1306 devices = &root->fs_info->fs_devices->devices; 1291 devices = &root->fs_info->fs_devices->devices;
1307 list_for_each(cur, devices) { 1292 list_for_each_entry(device, devices, dev_list) {
1308 device = list_entry(cur, struct btrfs_device, dev_list);
1309 if (device->bdev == bdev) { 1293 if (device->bdev == bdev) {
1310 ret = -EEXIST; 1294 ret = -EEXIST;
1311 goto error; 1295 goto error;
@@ -1704,7 +1688,6 @@ static u64 div_factor(u64 num, int factor)
1704int btrfs_balance(struct btrfs_root *dev_root) 1688int btrfs_balance(struct btrfs_root *dev_root)
1705{ 1689{
1706 int ret; 1690 int ret;
1707 struct list_head *cur;
1708 struct list_head *devices = &dev_root->fs_info->fs_devices->devices; 1691 struct list_head *devices = &dev_root->fs_info->fs_devices->devices;
1709 struct btrfs_device *device; 1692 struct btrfs_device *device;
1710 u64 old_size; 1693 u64 old_size;
@@ -1723,8 +1706,7 @@ int btrfs_balance(struct btrfs_root *dev_root)
1723 dev_root = dev_root->fs_info->dev_root; 1706 dev_root = dev_root->fs_info->dev_root;
1724 1707
1725 /* step one make some room on all the devices */ 1708 /* step one make some room on all the devices */
1726 list_for_each(cur, devices) { 1709 list_for_each_entry(device, devices, dev_list) {
1727 device = list_entry(cur, struct btrfs_device, dev_list);
1728 old_size = device->total_bytes; 1710 old_size = device->total_bytes;
1729 size_to_free = div_factor(old_size, 1); 1711 size_to_free = div_factor(old_size, 1);
1730 size_to_free = min(size_to_free, (u64)1 * 1024 * 1024); 1712 size_to_free = min(size_to_free, (u64)1 * 1024 * 1024);
diff --git a/fs/btrfs/xattr.c b/fs/btrfs/xattr.c
index 7f332e270894..b4fa5f4b6ad1 100644
--- a/fs/btrfs/xattr.c
+++ b/fs/btrfs/xattr.c
@@ -45,9 +45,12 @@ ssize_t __btrfs_getxattr(struct inode *inode, const char *name,
45 /* lookup the xattr by name */ 45 /* lookup the xattr by name */
46 di = btrfs_lookup_xattr(NULL, root, path, inode->i_ino, name, 46 di = btrfs_lookup_xattr(NULL, root, path, inode->i_ino, name,
47 strlen(name), 0); 47 strlen(name), 0);
48 if (!di || IS_ERR(di)) { 48 if (!di) {
49 ret = -ENODATA; 49 ret = -ENODATA;
50 goto out; 50 goto out;
51 } else if (IS_ERR(di)) {
52 ret = PTR_ERR(di);
53 goto out;
51 } 54 }
52 55
53 leaf = path->nodes[0]; 56 leaf = path->nodes[0];
@@ -62,6 +65,14 @@ ssize_t __btrfs_getxattr(struct inode *inode, const char *name,
62 ret = -ERANGE; 65 ret = -ERANGE;
63 goto out; 66 goto out;
64 } 67 }
68
69 /*
70 * The way things are packed into the leaf is like this
71 * |struct btrfs_dir_item|name|data|
72 * where name is the xattr name, so security.foo, and data is the
73 * content of the xattr. data_ptr points to the location in memory
74 * where the data starts in the in memory leaf
75 */
65 data_ptr = (unsigned long)((char *)(di + 1) + 76 data_ptr = (unsigned long)((char *)(di + 1) +
66 btrfs_dir_name_len(leaf, di)); 77 btrfs_dir_name_len(leaf, di));
67 read_extent_buffer(leaf, buffer, data_ptr, 78 read_extent_buffer(leaf, buffer, data_ptr,
@@ -176,7 +187,6 @@ ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size)
176 ret = btrfs_search_slot(NULL, root, &key, path, 0, 0); 187 ret = btrfs_search_slot(NULL, root, &key, path, 0, 0);
177 if (ret < 0) 188 if (ret < 0)
178 goto err; 189 goto err;
179 ret = 0;
180 advance = 0; 190 advance = 0;
181 while (1) { 191 while (1) {
182 leaf = path->nodes[0]; 192 leaf = path->nodes[0];
generated by cgit v1.2.2 (git 2.25.0) at 2025-12-04 09:38:45 -0500