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authorAndreas Dilger <adilger@sun.com>2009-06-13 11:45:35 -0400
committerTheodore Ts'o <tytso@mit.edu>2009-06-13 11:45:35 -0400
commit11013911daea4820147ae6d7094dd7c6894e8651 (patch)
treef8e9f9d2058e0dfc826d4df3d88a7eb18a56b3f3 /fs/ext4/ext4.h
parentf157a4aa98a18bd3817a72bea90d48494e2586e7 (diff)
downloadop-kernel-dev-11013911daea4820147ae6d7094dd7c6894e8651.zip
op-kernel-dev-11013911daea4820147ae6d7094dd7c6894e8651.tar.gz
ext4: teach the inode allocator to use a goal inode number
Enhance the inode allocator to take a goal inode number as a paremeter; if it is specified, it takes precedence over Orlov or parent directory inode allocation algorithms. The extents migration function uses the goal inode number so that the extent trees allocated the migration function use the correct flex_bg. In the future, the goal inode functionality will also be used to allocate an adjacent inode for the extended attributes. Also, for testing purposes the goal inode number can be specified via /sys/fs/{dev}/inode_goal. This can be useful for testing inode allocation beyond 2^32 blocks on very large filesystems. Signed-off-by: Andreas Dilger <adilger@sun.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/ext4.h')
-rw-r--r--fs/ext4/ext4.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index d035cf1..746cdcb 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -863,6 +863,7 @@ struct ext4_sb_info {
int s_inode_size;
int s_first_ino;
unsigned int s_inode_readahead_blks;
+ unsigned int s_inode_goal;
spinlock_t s_next_gen_lock;
u32 s_next_generation;
u32 s_hash_seed[4];
@@ -1316,7 +1317,7 @@ extern int ext4fs_dirhash(const char *name, int len, struct
/* ialloc.c */
extern struct inode *ext4_new_inode(handle_t *, struct inode *, int,
- const struct qstr *qstr);
+ const struct qstr *qstr, __u32 goal);
extern void ext4_free_inode(handle_t *, struct inode *);
extern struct inode * ext4_orphan_get(struct super_block *, unsigned long);
extern unsigned long ext4_count_free_inodes(struct super_block *);
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