d984561b32
With the switch to using inode->i_mutex locking during lookups/creation in the xattr root, the per-super xattr lock is no longer needed. This patch removes it. Signed-off-by: Jeff Mahoney <jeffm@suse.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
113 lines
3.3 KiB
C
113 lines
3.3 KiB
C
/*
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File: linux/reiserfs_xattr.h
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*/
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#ifndef _LINUX_REISERFS_XATTR_H
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#define _LINUX_REISERFS_XATTR_H
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#include <linux/types.h>
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/* Magic value in header */
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#define REISERFS_XATTR_MAGIC 0x52465841 /* "RFXA" */
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struct reiserfs_xattr_header {
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__le32 h_magic; /* magic number for identification */
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__le32 h_hash; /* hash of the value */
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};
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#ifdef __KERNEL__
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#include <linux/init.h>
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#include <linux/list.h>
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#include <linux/rwsem.h>
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#include <linux/reiserfs_fs_i.h>
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#include <linux/reiserfs_fs.h>
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struct inode;
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struct dentry;
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struct iattr;
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struct super_block;
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struct nameidata;
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struct reiserfs_xattr_handler {
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char *prefix;
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int (*init) (void);
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void (*exit) (void);
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int (*get) (struct inode * inode, const char *name, void *buffer,
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size_t size);
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int (*set) (struct inode * inode, const char *name, const void *buffer,
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size_t size, int flags);
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int (*del) (struct inode * inode, const char *name);
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int (*list) (struct inode * inode, const char *name, int namelen,
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char *out);
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struct list_head handlers;
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};
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int reiserfs_xattr_register_handlers(void) __init;
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void reiserfs_xattr_unregister_handlers(void);
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int reiserfs_xattr_init(struct super_block *sb, int mount_flags);
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int reiserfs_delete_xattrs(struct inode *inode);
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int reiserfs_chown_xattrs(struct inode *inode, struct iattr *attrs);
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#ifdef CONFIG_REISERFS_FS_XATTR
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#define has_xattr_dir(inode) (REISERFS_I(inode)->i_flags & i_has_xattr_dir)
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ssize_t reiserfs_getxattr(struct dentry *dentry, const char *name,
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void *buffer, size_t size);
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int reiserfs_setxattr(struct dentry *dentry, const char *name,
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const void *value, size_t size, int flags);
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ssize_t reiserfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
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int reiserfs_removexattr(struct dentry *dentry, const char *name);
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int reiserfs_permission(struct inode *inode, int mask);
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int reiserfs_xattr_del(struct inode *, const char *);
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int reiserfs_xattr_get(const struct inode *, const char *, void *, size_t);
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int reiserfs_xattr_set(struct inode *, const char *, const void *, size_t, int);
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extern struct reiserfs_xattr_handler user_handler;
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extern struct reiserfs_xattr_handler trusted_handler;
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extern struct reiserfs_xattr_handler security_handler;
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static inline void reiserfs_write_lock_xattr_i(struct inode *inode)
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{
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down_write(&REISERFS_I(inode)->i_xattr_sem);
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}
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static inline void reiserfs_write_unlock_xattr_i(struct inode *inode)
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{
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up_write(&REISERFS_I(inode)->i_xattr_sem);
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}
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static inline void reiserfs_read_lock_xattr_i(struct inode *inode)
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{
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down_read(&REISERFS_I(inode)->i_xattr_sem);
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}
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static inline void reiserfs_read_unlock_xattr_i(struct inode *inode)
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{
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up_read(&REISERFS_I(inode)->i_xattr_sem);
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}
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static inline void reiserfs_init_xattr_rwsem(struct inode *inode)
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{
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init_rwsem(&REISERFS_I(inode)->i_xattr_sem);
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}
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#else
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#define reiserfs_getxattr NULL
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#define reiserfs_setxattr NULL
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#define reiserfs_listxattr NULL
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#define reiserfs_removexattr NULL
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#define reiserfs_write_lock_xattrs(sb) do {;} while(0)
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#define reiserfs_write_unlock_xattrs(sb) do {;} while(0)
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#define reiserfs_read_lock_xattrs(sb)
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#define reiserfs_read_unlock_xattrs(sb)
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#define reiserfs_permission NULL
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static inline void reiserfs_init_xattr_rwsem(struct inode *inode)
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{
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}
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#endif /* CONFIG_REISERFS_FS_XATTR */
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#endif /* __KERNEL__ */
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#endif /* _LINUX_REISERFS_XATTR_H */
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