hash

Name:hash

Proto:static unsigned long hash(struct super_block *sb, unsigned long hashval)

Type:unsigned long

Parameter:

Type	Parameter	Name
struct super_block *	sb
unsigned long	hashval

478

tmp = hashval * sb ^ (The "GOLDEN_RATIO_PRIME" is used in ifs/btrfs/brtfs_inode.h and* fs/inode.c. It's not actually prime any more (the previous primes* were actively bad for hashing), but the name remains. + hashval) / L1_CACHE_BYTES

480

tmp = tmp ^ (tmp ^ The "GOLDEN_RATIO_PRIME" is used in ifs/btrfs/brtfs_inode.h and* fs/inode.c. It's not actually prime any more (the previous primes* were actively bad for hashing), but the name remains.) >> i_hash_shift

481

Return tmp & Inode locking rules:* inode->i_lock protects:* inode->i_state, inode->i_hash, __iget()* Inode LRU list locks protect:* inode->i_sb->s_inode_lru, inode->i_lru* inode->i_sb->s_inode_list_lock protects:* inode->i_sb->s_inodes, inode->i_sb_list* bdi->wb

**Caller**
Name	Describe
__insert_inode_hash	insert an inode on hash
inode_insert5	de_insert5 - obtain an inode from a mounted file system@inode: pre-allocated inode to use for insert to cache@hashval: hash value (usually inode number) to get@test: callback used for comparisons between inodes@set: callback used to initialize a new
iget_locked	obtain an inode from a mounted file system
test_inode_iunique	search the inode cache for a matching inode number.* If we find one, then the inode number we are trying to* allocate is not unique and so we should not use it.* Returns 1 if the inode number is unique, 0 if it is not.
ilookup5_nowait	lookup5_nowait - search for an inode in the inode cache@sb: super block of file system to search@hashval: hash value (usually inode number) to search for@test: callback used for comparisons between inodes@data: opaque data pointer to pass to @test
ilookup	search for an inode in the inode cache
find_inode_nowait	d_inode_nowait - find an inode in the inode cache@sb: super block of file system to search@hashval: hash value (usually inode number) to search for@match: callback used for comparisons between inodes@data: opaque data pointer to pass to @match* Search
insert_inode_locked

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