aboutsummaryrefslogtreecommitdiffstats
path: root/fs/ext4/ext4.h
diff options
context:
space:
mode:
Diffstat (limited to 'fs/ext4/ext4.h')
-rw-r--r--fs/ext4/ext4.h125
1 files changed, 101 insertions, 24 deletions
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index f8578caba40d..61b37a052052 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -1052,8 +1052,6 @@ struct ext4_inode_info {
/* allocation reservation info for delalloc */
/* In case of bigalloc, this refer to clusters rather than blocks */
unsigned int i_reserved_data_blocks;
- ext4_lblk_t i_da_metadata_calc_last_lblock;
- int i_da_metadata_calc_len;
/* pending cluster reservations for bigalloc file systems */
struct ext4_pending_tree i_pending_tree;
@@ -1343,7 +1341,8 @@ struct ext4_super_block {
__u8 s_lastcheck_hi;
__u8 s_first_error_time_hi;
__u8 s_last_error_time_hi;
- __u8 s_pad[2];
+ __u8 s_first_error_errcode;
+ __u8 s_last_error_errcode;
__le16 s_encoding; /* Filename charset encoding */
__le16 s_encoding_flags; /* Filename charset encoding flags */
__le32 s_reserved[95]; /* Padding to the end of the block */
@@ -1401,7 +1400,7 @@ struct ext4_sb_info {
loff_t s_bitmap_maxbytes; /* max bytes for bitmap files */
struct buffer_head * s_sbh; /* Buffer containing the super block */
struct ext4_super_block *s_es; /* Pointer to the super block in the buffer */
- struct buffer_head **s_group_desc;
+ struct buffer_head * __rcu *s_group_desc;
unsigned int s_mount_opt;
unsigned int s_mount_opt2;
unsigned int s_mount_flags;
@@ -1463,7 +1462,7 @@ struct ext4_sb_info {
#endif
/* for buddy allocator */
- struct ext4_group_info ***s_group_info;
+ struct ext4_group_info ** __rcu *s_group_info;
struct inode *s_buddy_cache;
spinlock_t s_md_lock;
unsigned short *s_mb_offsets;
@@ -1513,7 +1512,7 @@ struct ext4_sb_info {
unsigned int s_extent_max_zeroout_kb;
unsigned int s_log_groups_per_flex;
- struct flex_groups *s_flex_groups;
+ struct flex_groups * __rcu *s_flex_groups;
ext4_group_t s_flex_groups_allocated;
/* workqueue for reserved extent conversions (buffered io) */
@@ -1553,9 +1552,15 @@ struct ext4_sb_info {
struct ratelimit_state s_warning_ratelimit_state;
struct ratelimit_state s_msg_ratelimit_state;
- /* Barrier between changing inodes' journal flags and writepages ops. */
- struct percpu_rw_semaphore s_journal_flag_rwsem;
+ /*
+ * Barrier between writepages ops and changing any inode's JOURNAL_DATA
+ * or EXTENTS flag.
+ */
+ struct percpu_rw_semaphore s_writepages_rwsem;
struct dax_device *s_daxdev;
+#ifdef CONFIG_EXT4_DEBUG
+ unsigned long s_simulate_fail;
+#endif
};
static inline struct ext4_sb_info *EXT4_SB(struct super_block *sb)
@@ -1575,6 +1580,83 @@ static inline int ext4_valid_inum(struct super_block *sb, unsigned long ino)
}
/*
+ * Returns: sbi->field[index]
+ * Used to access an array element from the following sbi fields which require
+ * rcu protection to avoid dereferencing an invalid pointer due to reassignment
+ * - s_group_desc
+ * - s_group_info
+ * - s_flex_group
+ */
+#define sbi_array_rcu_deref(sbi, field, index) \
+({ \
+ typeof(*((sbi)->field)) _v; \
+ rcu_read_lock(); \
+ _v = ((typeof(_v)*)rcu_dereference((sbi)->field))[index]; \
+ rcu_read_unlock(); \
+ _v; \
+})
+
+/*
+ * Simulate_fail codes
+ */
+#define EXT4_SIM_BBITMAP_EIO 1
+#define EXT4_SIM_BBITMAP_CRC 2
+#define EXT4_SIM_IBITMAP_EIO 3
+#define EXT4_SIM_IBITMAP_CRC 4
+#define EXT4_SIM_INODE_EIO 5
+#define EXT4_SIM_INODE_CRC 6
+#define EXT4_SIM_DIRBLOCK_EIO 7
+#define EXT4_SIM_DIRBLOCK_CRC 8
+
+static inline bool ext4_simulate_fail(struct super_block *sb,
+ unsigned long code)
+{
+#ifdef CONFIG_EXT4_DEBUG
+ struct ext4_sb_info *sbi = EXT4_SB(sb);
+
+ if (unlikely(sbi->s_simulate_fail == code)) {
+ sbi->s_simulate_fail = 0;
+ return true;
+ }
+#endif
+ return false;
+}
+
+static inline void ext4_simulate_fail_bh(struct super_block *sb,
+ struct buffer_head *bh,
+ unsigned long code)
+{
+ if (!IS_ERR(bh) && ext4_simulate_fail(sb, code))
+ clear_buffer_uptodate(bh);
+}
+
+/*
+ * Error number codes for s_{first,last}_error_errno
+ *
+ * Linux errno numbers are architecture specific, so we need to translate
+ * them into something which is architecture independent. We don't define
+ * codes for all errno's; just the ones which are most likely to be the cause
+ * of an ext4_error() call.
+ */
+#define EXT4_ERR_UNKNOWN 1
+#define EXT4_ERR_EIO 2
+#define EXT4_ERR_ENOMEM 3
+#define EXT4_ERR_EFSBADCRC 4
+#define EXT4_ERR_EFSCORRUPTED 5
+#define EXT4_ERR_ENOSPC 6
+#define EXT4_ERR_ENOKEY 7
+#define EXT4_ERR_EROFS 8
+#define EXT4_ERR_EFBIG 9
+#define EXT4_ERR_EEXIST 10
+#define EXT4_ERR_ERANGE 11
+#define EXT4_ERR_EOVERFLOW 12
+#define EXT4_ERR_EBUSY 13
+#define EXT4_ERR_ENOTDIR 14
+#define EXT4_ERR_ENOTEMPTY 15
+#define EXT4_ERR_ESHUTDOWN 16
+#define EXT4_ERR_EFAULT 17
+
+/*
* Inode dynamic state flags
*/
enum {
@@ -2482,8 +2564,11 @@ void ext4_insert_dentry(struct inode *inode,
struct ext4_filename *fname);
static inline void ext4_update_dx_flag(struct inode *inode)
{
- if (!ext4_has_feature_dir_index(inode->i_sb))
+ if (!ext4_has_feature_dir_index(inode->i_sb)) {
+ /* ext4_iget() should have caught this... */
+ WARN_ON_ONCE(ext4_has_feature_metadata_csum(inode->i_sb));
ext4_clear_inode_flag(inode, EXT4_INODE_INDEX);
+ }
}
static const unsigned char ext4_filetype_table[] = {
DT_UNKNOWN, DT_REG, DT_DIR, DT_CHR, DT_BLK, DT_FIFO, DT_SOCK, DT_LNK
@@ -2628,7 +2713,6 @@ extern int ext4_issue_zeroout(struct inode *inode, ext4_lblk_t lblk,
/* indirect.c */
extern int ext4_ind_map_blocks(handle_t *handle, struct inode *inode,
struct ext4_map_blocks *map, int flags);
-extern int ext4_ind_calc_metadata_amount(struct inode *inode, sector_t lblock);
extern int ext4_ind_trans_blocks(struct inode *inode, int nrblocks);
extern void ext4_ind_truncate(handle_t *, struct inode *inode);
extern int ext4_ind_remove_space(handle_t *handle, struct inode *inode,
@@ -2666,6 +2750,7 @@ extern int ext4_generic_delete_entry(handle_t *handle,
extern bool ext4_empty_dir(struct inode *inode);
/* resize.c */
+extern void ext4_kvfree_array_rcu(void *to_free);
extern int ext4_group_add(struct super_block *sb,
struct ext4_new_group_data *input);
extern int ext4_group_extend(struct super_block *sb,
@@ -2679,8 +2764,6 @@ extern struct buffer_head *ext4_sb_bread(struct super_block *sb,
extern int ext4_seq_options_show(struct seq_file *seq, void *offset);
extern int ext4_calculate_overhead(struct super_block *sb);
extern void ext4_superblock_csum_set(struct super_block *sb);
-extern void *ext4_kvmalloc(size_t size, gfp_t flags);
-extern void *ext4_kvzalloc(size_t size, gfp_t flags);
extern int ext4_alloc_flex_bg_array(struct super_block *sb,
ext4_group_t ngroup);
extern const char *ext4_decode_error(struct super_block *sb, int errno,
@@ -2688,6 +2771,7 @@ extern const char *ext4_decode_error(struct super_block *sb, int errno,
extern void ext4_mark_group_bitmap_corrupted(struct super_block *sb,
ext4_group_t block_group,
unsigned int flags);
+extern void ext4_set_errno(struct super_block *sb, int err);
extern __printf(4, 5)
void __ext4_error(struct super_block *, const char *, unsigned int,
@@ -2913,13 +2997,13 @@ static inline
struct ext4_group_info *ext4_get_group_info(struct super_block *sb,
ext4_group_t group)
{
- struct ext4_group_info ***grp_info;
+ struct ext4_group_info **grp_info;
long indexv, indexh;
BUG_ON(group >= EXT4_SB(sb)->s_groups_count);
- grp_info = EXT4_SB(sb)->s_group_info;
indexv = group >> (EXT4_DESC_PER_BLOCK_BITS(sb));
indexh = group & ((EXT4_DESC_PER_BLOCK(sb)) - 1);
- return grp_info[indexv][indexh];
+ grp_info = sbi_array_rcu_deref(EXT4_SB(sb), s_group_info, indexv);
+ return grp_info[indexh];
}
/*
@@ -2969,7 +3053,7 @@ static inline void ext4_update_i_disksize(struct inode *inode, loff_t newsize)
!inode_is_locked(inode));
down_write(&EXT4_I(inode)->i_data_sem);
if (newsize > EXT4_I(inode)->i_disksize)
- EXT4_I(inode)->i_disksize = newsize;
+ WRITE_ONCE(EXT4_I(inode)->i_disksize, newsize);
up_write(&EXT4_I(inode)->i_data_sem);
}
@@ -3254,7 +3338,6 @@ struct ext4_extent;
#define EXT_MAX_BLOCKS 0xffffffff
extern int ext4_ext_tree_init(handle_t *handle, struct inode *);
-extern int ext4_ext_writepage_trans_blocks(struct inode *, int);
extern int ext4_ext_index_trans_blocks(struct inode *inode, int extents);
extern int ext4_ext_map_blocks(handle_t *handle, struct inode *inode,
struct ext4_map_blocks *map, int flags);
@@ -3271,14 +3354,9 @@ extern int ext4_convert_unwritten_io_end_vec(handle_t *handle,
ext4_io_end_t *io_end);
extern int ext4_map_blocks(handle_t *handle, struct inode *inode,
struct ext4_map_blocks *map, int flags);
-extern int ext4_ext_calc_metadata_amount(struct inode *inode,
- ext4_lblk_t lblocks);
extern int ext4_ext_calc_credits_for_single_extent(struct inode *inode,
int num,
struct ext4_ext_path *path);
-extern int ext4_can_extents_be_merged(struct inode *inode,
- struct ext4_extent *ex1,
- struct ext4_extent *ex2);
extern int ext4_ext_insert_extent(handle_t *, struct inode *,
struct ext4_ext_path **,
struct ext4_extent *, int);
@@ -3294,8 +3372,6 @@ extern int ext4_get_es_cache(struct inode *inode,
struct fiemap_extent_info *fieinfo,
__u64 start, __u64 len);
extern int ext4_ext_precache(struct inode *inode);
-extern int ext4_collapse_range(struct inode *inode, loff_t offset, loff_t len);
-extern int ext4_insert_range(struct inode *inode, loff_t offset, loff_t len);
extern int ext4_swap_extents(handle_t *handle, struct inode *inode1,
struct inode *inode2, ext4_lblk_t lblk1,
ext4_lblk_t lblk2, ext4_lblk_t count,
@@ -3390,6 +3466,7 @@ static inline void ext4_clear_io_unwritten_flag(ext4_io_end_t *io_end)
}
extern const struct iomap_ops ext4_iomap_ops;
+extern const struct iomap_ops ext4_iomap_overwrite_ops;
extern const struct iomap_ops ext4_iomap_report_ops;
static inline int ext4_buffer_uptodate(struct buffer_head *bh)
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.