Merge tag 'v2.6.38' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6

[mv-sheeva.git] / fs / btrfs / ctree.h

diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index af52f6d7a4d8ed8269f0cf835ab09c14d9a5c8a1..7f78cc78fdd0a3dcc77218be33be516b5f2ac038 100644 (file)
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -27,6 +27,7 @@
 #include <linux/backing-dev.h>
 #include <linux/wait.h>
 #include <linux/slab.h>
+#include <linux/kobject.h>
 #include <asm/kmap_types.h>
 #include "extent_io.h"
 #include "extent_map.h"
@@ -294,6 +295,14 @@ static inline unsigned long btrfs_chunk_item_size(int num_stripes)
 #define BTRFS_FSID_SIZE 16
 #define BTRFS_HEADER_FLAG_WRITTEN      (1ULL << 0)
 #define BTRFS_HEADER_FLAG_RELOC                (1ULL << 1)
+
+/*
+ * File system states
+ */
+
+/* Errors detected */
+#define BTRFS_SUPER_FLAG_ERROR         (1ULL << 2)
+
 #define BTRFS_SUPER_FLAG_SEEDING       (1ULL << 32)
 #define BTRFS_SUPER_FLAG_METADUMP      (1ULL << 33)
 
@@ -398,13 +407,15 @@ struct btrfs_super_block {
 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF   (1ULL << 0)
 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL  (1ULL << 1)
 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS    (1ULL << 2)
+#define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO    (1ULL << 3)
 
 #define BTRFS_FEATURE_COMPAT_SUPP              0ULL
 #define BTRFS_FEATURE_COMPAT_RO_SUPP           0ULL
 #define BTRFS_FEATURE_INCOMPAT_SUPP                    \
        (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF |         \
         BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL |        \
-        BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS)
+        BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS |          \
+        BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO)
 
 /*
  * A leaf is full of items. offset and size tell us where to find
@@ -551,9 +562,11 @@ struct btrfs_timespec {
 } __attribute__ ((__packed__));
 
 enum btrfs_compression_type {
-       BTRFS_COMPRESS_NONE = 0,
-       BTRFS_COMPRESS_ZLIB = 1,
-       BTRFS_COMPRESS_LAST = 2,
+       BTRFS_COMPRESS_NONE  = 0,
+       BTRFS_COMPRESS_ZLIB  = 1,
+       BTRFS_COMPRESS_LZO   = 2,
+       BTRFS_COMPRESS_TYPES = 2,
+       BTRFS_COMPRESS_LAST  = 3,
 };
 
 struct btrfs_inode_item {
@@ -597,6 +610,8 @@ struct btrfs_dir_item {
        u8 type;
 } __attribute__ ((__packed__));
 
+#define BTRFS_ROOT_SUBVOL_RDONLY       (1ULL << 0)
+
 struct btrfs_root_item {
        struct btrfs_inode_item inode;
        __le64 generation;
@@ -714,6 +729,15 @@ struct btrfs_space_info {
        u64 disk_total;         /* total bytes on disk, takes mirrors into
                                   account */
 
+       /*
+        * we bump reservation progress every time we decrement
+        * bytes_reserved.  This way people waiting for reservations
+        * know something good has happened and they can check
+        * for progress.  The number here isn't to be trusted, it
+        * just shows reclaim activity
+        */
+       unsigned long reservation_progress;
+
        int full;               /* indicates that we cannot allocate any more
                                   chunks for this space */
        int force_alloc;        /* set if we need to force a chunk alloc for
@@ -895,7 +919,8 @@ struct btrfs_fs_info {
         */
        u64 last_trans_log_full_commit;
        u64 open_ioctl_trans;
-       unsigned long mount_opt;
+       unsigned long mount_opt:20;
+       unsigned long compress_type:4;
        u64 max_inline;
        u64 alloc_start;
        struct btrfs_transaction *running_transaction;
@@ -1050,6 +1075,9 @@ struct btrfs_fs_info {
        unsigned metadata_ratio;
 
        void *bdev_holder;
+
+       /* filesystem state */
+       u64 fs_state;
 };
 
 /*
@@ -1235,6 +1263,7 @@ struct btrfs_root {
 #define BTRFS_MOUNT_SPACE_CACHE                (1 << 12)
 #define BTRFS_MOUNT_CLEAR_CACHE                (1 << 13)
 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
+#define BTRFS_MOUNT_ENOSPC_DEBUG        (1 << 15)
 
 #define btrfs_clear_opt(o, opt)                ((o) &= ~BTRFS_MOUNT_##opt)
 #define btrfs_set_opt(o, opt)          ((o) |= BTRFS_MOUNT_##opt)
@@ -1893,6 +1922,11 @@ BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
                         last_snapshot, 64);
 
+static inline bool btrfs_root_readonly(struct btrfs_root *root)
+{
+       return root->root_item.flags & BTRFS_ROOT_SUBVOL_RDONLY;
+}
+
 /* struct btrfs_super_block */
 
 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
@@ -2145,6 +2179,7 @@ int btrfs_make_block_group(struct btrfs_trans_handle *trans,
 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
                             struct btrfs_root *root, u64 group_start);
 u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags);
+u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data);
 void btrfs_set_inode_space_info(struct btrfs_root *root, struct inode *ionde);
 void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
 int btrfs_check_data_free_space(struct inode *inode, u64 bytes);
@@ -2188,6 +2223,14 @@ int btrfs_set_block_group_ro(struct btrfs_root *root,
 int btrfs_set_block_group_rw(struct btrfs_root *root,
                             struct btrfs_block_group_cache *cache);
 void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
+u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
+int btrfs_error_unpin_extent_range(struct btrfs_root *root,
+                                  u64 start, u64 end);
+int btrfs_error_discard_extent(struct btrfs_root *root, u64 bytenr,
+                              u64 num_bytes);
+int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans,
+                           struct btrfs_root *root, u64 type);
+
 /* ctree.c */
 int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key,
                     int level, int *slot);
@@ -2541,10 +2584,18 @@ ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
 /* super.c */
 int btrfs_parse_options(struct btrfs_root *root, char *options);
 int btrfs_sync_fs(struct super_block *sb, int wait);
+void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function,
+                    unsigned int line, int errno);
+
+#define btrfs_std_error(fs_info, errno)                                \
+do {                                                           \
+       if ((errno))                                            \
+               __btrfs_std_error((fs_info), __func__, __LINE__, (errno));\
+} while (0)
 
 /* acl.c */
 #ifdef CONFIG_BTRFS_FS_POSIX_ACL
-int btrfs_check_acl(struct inode *inode, int mask);
+int btrfs_check_acl(struct inode *inode, int mask, unsigned int flags);
 #else
 #define btrfs_check_acl NULL
 #endif