On Thu 26-02-26 10:55:03, Jeff Layton wrote:
Change the inode hash/lookup VFS API functions to accept u64 parameters instead of unsigned long for inode numbers and hash values. This is preparation for widening i_ino itself to u64, which will allow filesystems to store full 64-bit inode numbers on 32-bit architectures.
Since unsigned long implicitly widens to u64 on all architectures, this change is backward-compatible with all existing callers.
Functions updated:
- hash(), find_inode_fast(), find_inode_by_ino_rcu(), test_inode_iunique()
- __insert_inode_hash(), iget_locked(), iget5_locked(), iget5_locked_rcu()
- ilookup(), ilookup5(), ilookup5_nowait()
- find_inode_nowait(), find_inode_rcu()
- inode_insert5(), insert_inode_locked4()
- insert_inode_locked() (local variable)
- dump_mapping() (local variable and format string)
Signed-off-by: Jeff Layton jlayton@kernel.org
Looks good. Feel free to add:
Reviewed-by: Jan Kara jack@suse.cz
Honza
fs/inode.c | 46 +++++++++++++++++++++++----------------------- include/linux/fs.h | 26 +++++++++++++------------- 2 files changed, 36 insertions(+), 36 deletions(-)
diff --git a/fs/inode.c b/fs/inode.c index cc12b68e021b2c97cc88a46ddc736334ecb8edfa..2cabec9043e8176d20aecc5ce7e0f276c114f122 100644 --- a/fs/inode.c +++ b/fs/inode.c @@ -672,7 +672,7 @@ static inline void inode_sb_list_del(struct inode *inode) } } -static unsigned long hash(struct super_block *sb, unsigned long hashval) +static unsigned long hash(struct super_block *sb, u64 hashval) { unsigned long tmp; @@ -685,12 +685,12 @@ static unsigned long hash(struct super_block *sb, unsigned long hashval) /**
- __insert_inode_hash - hash an inode
- @inode: unhashed inode
- @hashval: unsigned long value used to locate this object in the
*/
- @hashval: u64 value used to locate this object in the
inode_hashtable.- Add an inode to the inode hash for this superblock.
-void __insert_inode_hash(struct inode *inode, unsigned long hashval) +void __insert_inode_hash(struct inode *inode, u64 hashval) { struct hlist_head *b = inode_hashtable + hash(inode->i_sb, hashval); @@ -726,7 +726,7 @@ void dump_mapping(const struct address_space *mapping) struct dentry *dentry_ptr; struct dentry dentry; char fname[64] = {};
- unsigned long ino;
- u64 ino;
/* * If mapping is an invalid pointer, we don't want to crash @@ -750,14 +750,14 @@ void dump_mapping(const struct address_space *mapping) } if (!dentry_first) {
pr_warn("aops:%ps ino:%lx\n", a_ops, ino);
pr_warn("aops:%ps ino:%llx\n", a_ops, ino);dentry_ptr = container_of(dentry_first, struct dentry, d_u.d_alias); if (get_kernel_nofault(dentry, dentry_ptr) || !dentry.d_parent || !dentry.d_name.name) {
pr_warn("aops:%ps ino:%lx invalid dentry:%px\n",
pr_warn("aops:%ps ino:%llx invalid dentry:%px\n", a_ops, ino, dentry_ptr);@@ -768,7 +768,7 @@ void dump_mapping(const struct address_space *mapping) * Even if strncpy_from_kernel_nofault() succeeded, * the fname could be unreliable */
- pr_warn("aops:%ps ino:%lx dentry name(?):"%s"\n",
- pr_warn("aops:%ps ino:%llx dentry name(?):"%s"\n", a_ops, ino, fname);
} @@ -1087,7 +1087,7 @@ static struct inode *find_inode(struct super_block *sb,
- iget_locked for details.
*/ static struct inode *find_inode_fast(struct super_block *sb,
struct hlist_head *head, unsigned long ino,
struct hlist_head *head, u64 ino, bool hash_locked, bool *isnew){ struct inode *inode = NULL; @@ -1301,7 +1301,7 @@ EXPORT_SYMBOL(unlock_two_nondirectories);
- Note that both @test and @set are called with the inode_hash_lock held, so
- they can't sleep.
*/ -struct inode *inode_insert5(struct inode *inode, unsigned long hashval, +struct inode *inode_insert5(struct inode *inode, u64 hashval, int (*test)(struct inode *, void *), int (*set)(struct inode *, void *), void *data) { @@ -1378,7 +1378,7 @@ EXPORT_SYMBOL(inode_insert5);
- Note that both @test and @set are called with the inode_hash_lock held, so
- they can't sleep.
*/ -struct inode *iget5_locked(struct super_block *sb, unsigned long hashval, +struct inode *iget5_locked(struct super_block *sb, u64 hashval, int (*test)(struct inode *, void *), int (*set)(struct inode *, void *), void *data) { @@ -1408,7 +1408,7 @@ EXPORT_SYMBOL(iget5_locked);
- This is equivalent to iget5_locked, except the @test callback must
- tolerate the inode not being stable, including being mid-teardown.
*/ -struct inode *iget5_locked_rcu(struct super_block *sb, unsigned long hashval, +struct inode *iget5_locked_rcu(struct super_block *sb, u64 hashval, int (*test)(struct inode *, void *), int (*set)(struct inode *, void *), void *data) { @@ -1455,7 +1455,7 @@ EXPORT_SYMBOL_GPL(iget5_locked_rcu);
- hashed, and with the I_NEW flag set. The file system gets to fill it in
- before unlocking it via unlock_new_inode().
*/ -struct inode *iget_locked(struct super_block *sb, unsigned long ino) +struct inode *iget_locked(struct super_block *sb, u64 ino) { struct hlist_head *head = inode_hashtable + hash(sb, ino); struct inode *inode; @@ -1527,7 +1527,7 @@ EXPORT_SYMBOL(iget_locked);
- Returns 1 if the inode number is unique, 0 if it is not.
*/ -static int test_inode_iunique(struct super_block *sb, unsigned long ino) +static int test_inode_iunique(struct super_block *sb, u64 ino) { struct hlist_head *b = inode_hashtable + hash(sb, ino); struct inode *inode; @@ -1616,7 +1616,7 @@ EXPORT_SYMBOL(igrab);
- Note2: @test is called with the inode_hash_lock held, so can't sleep.
*/ -struct inode *ilookup5_nowait(struct super_block *sb, unsigned long hashval, +struct inode *ilookup5_nowait(struct super_block *sb, u64 hashval, int (*test)(struct inode *, void *), void *data, bool *isnew) { struct hlist_head *head = inode_hashtable + hash(sb, hashval); @@ -1647,7 +1647,7 @@ EXPORT_SYMBOL(ilookup5_nowait);
- Note: @test is called with the inode_hash_lock held, so can't sleep.
*/ -struct inode *ilookup5(struct super_block *sb, unsigned long hashval, +struct inode *ilookup5(struct super_block *sb, u64 hashval, int (*test)(struct inode *, void *), void *data) { struct inode *inode; @@ -1677,7 +1677,7 @@ EXPORT_SYMBOL(ilookup5);
- Search for the inode @ino in the inode cache, and if the inode is in the
- cache, the inode is returned with an incremented reference count.
*/ -struct inode *ilookup(struct super_block *sb, unsigned long ino) +struct inode *ilookup(struct super_block *sb, u64 ino) { struct hlist_head *head = inode_hashtable + hash(sb, ino); struct inode *inode; @@ -1726,8 +1726,8 @@ EXPORT_SYMBOL(ilookup);
- very carefully implemented.
*/ struct inode *find_inode_nowait(struct super_block *sb,
unsigned long hashval,int (*match)(struct inode *, unsigned long,
u64 hashval,int (*match)(struct inode *, u64, void *), void *data){ @@ -1773,7 +1773,7 @@ EXPORT_SYMBOL(find_inode_nowait);
- The caller must hold the RCU read lock.
*/ -struct inode *find_inode_rcu(struct super_block *sb, unsigned long hashval, +struct inode *find_inode_rcu(struct super_block *sb, u64 hashval, int (*test)(struct inode *, void *), void *data) { struct hlist_head *head = inode_hashtable + hash(sb, hashval); @@ -1812,7 +1812,7 @@ EXPORT_SYMBOL(find_inode_rcu);
- The caller must hold the RCU read lock.
*/ struct inode *find_inode_by_ino_rcu(struct super_block *sb,
unsigned long ino)
u64 ino){ struct hlist_head *head = inode_hashtable + hash(sb, ino); struct inode *inode; @@ -1833,7 +1833,7 @@ EXPORT_SYMBOL(find_inode_by_ino_rcu); int insert_inode_locked(struct inode *inode) { struct super_block *sb = inode->i_sb;
- ino_t ino = inode->i_ino;
- u64 ino = inode->i_ino; struct hlist_head *head = inode_hashtable + hash(sb, ino); bool isnew;
@@ -1884,7 +1884,7 @@ int insert_inode_locked(struct inode *inode) } EXPORT_SYMBOL(insert_inode_locked); -int insert_inode_locked4(struct inode *inode, unsigned long hashval, +int insert_inode_locked4(struct inode *inode, u64 hashval, int (*test)(struct inode *, void *), void *data) { struct inode *old; @@ -2642,7 +2642,7 @@ void init_special_inode(struct inode *inode, umode_t mode, dev_t rdev) break; default: printk(KERN_DEBUG "init_special_inode: bogus i_mode (%o) for"
" inode %s:%lu\n", mode, inode->i_sb->s_id,
" inode %s:%llu\n", mode, inode->i_sb->s_id, inode->i_ino);diff --git a/include/linux/fs.h b/include/linux/fs.h index 8b3dd145b25ec12b00ac1df17a952d9116b88047..dfa1f475b1c480c503ab6f00e891aa9b051607fa 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -2935,32 +2935,32 @@ static inline int inode_generic_drop(struct inode *inode) extern void d_mark_dontcache(struct inode *inode); extern struct inode *ilookup5_nowait(struct super_block *sb,
unsigned long hashval, int (*test)(struct inode *, void *),
u64 hashval, int (*test)(struct inode *, void *),-extern struct inode *ilookup5(struct super_block *sb, unsigned long hashval, +extern struct inode *ilookup5(struct super_block *sb, u64 hashval, int (*test)(struct inode *, void *), void *data); -extern struct inode *ilookup(struct super_block *sb, unsigned long ino); +extern struct inode *ilookup(struct super_block *sb, u64 ino); -extern struct inode *inode_insert5(struct inode *inode, unsigned long hashval, +extern struct inode *inode_insert5(struct inode *inode, u64 hashval, int (*test)(struct inode *, void *), int (*set)(struct inode *, void *), void *data); -struct inode *iget5_locked(struct super_block *, unsigned long, +struct inode *iget5_locked(struct super_block *, u64, int (*test)(struct inode *, void *), int (*set)(struct inode *, void *), void *); -struct inode *iget5_locked_rcu(struct super_block *, unsigned long, +struct inode *iget5_locked_rcu(struct super_block *, u64, int (*test)(struct inode *, void *), int (*set)(struct inode *, void *), void *); -extern struct inode * iget_locked(struct super_block *, unsigned long); +extern struct inode *iget_locked(struct super_block *, u64); extern struct inode *find_inode_nowait(struct super_block *,
unsigned long,
u64, int (*match)(struct inode *,
unsigned long, void *),
u64, void *), void *data);-extern struct inode *find_inode_rcu(struct super_block *, unsigned long, +extern struct inode *find_inode_rcu(struct super_block *, u64, int (*)(struct inode *, void *), void *); -extern struct inode *find_inode_by_ino_rcu(struct super_block *, unsigned long); -extern int insert_inode_locked4(struct inode *, unsigned long, int (*test)(struct inode *, void *), void *); +extern struct inode *find_inode_by_ino_rcu(struct super_block *, u64); +extern int insert_inode_locked4(struct inode *, u64, int (*test)(struct inode *, void *), void *); extern int insert_inode_locked(struct inode *); #ifdef CONFIG_DEBUG_LOCK_ALLOC extern void lockdep_annotate_inode_mutex_key(struct inode *inode); @@ -3015,7 +3015,7 @@ int setattr_should_drop_sgid(struct mnt_idmap *idmap, */ #define alloc_inode_sb(_sb, _cache, _gfp) kmem_cache_alloc_lru(_cache, &_sb->s_inode_lru, _gfp) -extern void __insert_inode_hash(struct inode *, unsigned long hashval); +extern void __insert_inode_hash(struct inode *, u64 hashval); static inline void insert_inode_hash(struct inode *inode) { __insert_inode_hash(inode, inode->i_ino);
-- 2.53.0