--------------------------- dentry_operations --------------------------
prototypes:
int (*d_revalidate)(struct dentry *, int);
- int (*d_hash) (struct dentry *, struct qstr *);
- int (*d_compare) (struct dentry *, struct qstr *, struct qstr *);
+ int (*d_hash)(const struct dentry *, const struct inode *,
+ struct qstr *);
+ int (*d_compare)(const struct dentry *, const struct inode *,
+ const struct dentry *, const struct inode *,
+ unsigned int, const char *, const struct qstr *);
int (*d_delete)(struct dentry *);
void (*d_release)(struct dentry *);
void (*d_iput)(struct dentry *, struct inode *);
locking rules:
dcache_lock rename_lock ->d_lock may block
d_revalidate: no no no yes
-d_hash no no no yes
+d_hash no no no no
d_compare: no yes no no
d_delete: yes no yes no
d_release: no no no yes
ssize_t (*quota_read)(struct super_block *, int, char *, size_t, loff_t);
ssize_t (*quota_write)(struct super_block *, int, const char *, size_t, loff_t);
int (*bdev_try_to_free_page)(struct super_block*, struct page*, gfp_t);
- int (*trim_fs) (struct super_block *, struct fstrim_range *);
locking rules:
All may block [not true, see below]
quota_read: no (see below)
quota_write: no (see below)
bdev_try_to_free_page: no (see below)
-trim_fs: no
->statfs() has s_umount (shared) when called by ustat(2) (native or
compat), but that's an accident of bad API; s_umount is used to pin