/* File: linux/ext2_xattr.h On-disk format of extended attributes for the ext2 filesystem. (C) 2001 Andreas Gruenbacher, */ #include #include /* Magic value in attribute blocks */ #define EXT2_XATTR_MAGIC 0xEA020000 /* Maximum number of references to one attribute block */ #define EXT2_XATTR_REFCOUNT_MAX 1024 /* Name indexes */ #define EXT2_XATTR_INDEX_USER 1 #define EXT2_XATTR_INDEX_POSIX_ACL_ACCESS 2 #define EXT2_XATTR_INDEX_POSIX_ACL_DEFAULT 3 #define EXT2_XATTR_INDEX_TRUSTED 4 #define EXT2_XATTR_INDEX_LUSTRE 5 #define EXT2_XATTR_INDEX_SECURITY 6 struct ext2_xattr_header { __le32 h_magic; /* magic number for identification */ __le32 h_refcount; /* reference count */ __le32 h_blocks; /* number of disk blocks used */ __le32 h_hash; /* hash value of all attributes */ __u32 h_reserved[4]; /* zero right now */ }; struct ext2_xattr_entry { __u8 e_name_len; /* length of name */ __u8 e_name_index; /* attribute name index */ __le16 e_value_offs; /* offset in disk block of value */ __le32 e_value_block; /* disk block attribute is stored on (n/i) */ __le32 e_value_size; /* size of attribute value */ __le32 e_hash; /* hash value of name and value */ char e_name[0]; /* attribute name */ }; #define EXT2_XATTR_PAD_BITS 2 #define EXT2_XATTR_PAD (1<e_name_len)) ) #define EXT2_XATTR_SIZE(size) \ (((size) + EXT2_XATTR_ROUND) & ~EXT2_XATTR_ROUND) struct mb_cache; # ifdef CONFIG_EXT2_FS_XATTR extern const struct xattr_handler ext2_xattr_user_handler; extern const struct xattr_handler ext2_xattr_trusted_handler; extern const struct xattr_handler ext2_xattr_security_handler; extern ssize_t ext2_listxattr(struct dentry *, char *, size_t); extern int ext2_xattr_get(struct inode *, int, const char *, void *, size_t); extern int ext2_xattr_set(struct inode *, int, const char *, const void *, size_t, int); extern void ext2_xattr_delete_inode(struct inode *); extern struct mb_cache *ext2_xattr_create_cache(void); extern void ext2_xattr_destroy_cache(struct mb_cache *cache); extern const struct xattr_handler *ext2_xattr_handlers[]; # else /* CONFIG_EXT2_FS_XATTR */ static inline int ext2_xattr_get(struct inode *inode, int name_index, const char *name, void *buffer, size_t size) { return -EOPNOTSUPP; } static inline int ext2_xattr_set(struct inode *inode, int name_index, const char *name, const void *value, size_t size, int flags) { return -EOPNOTSUPP; } static inline void ext2_xattr_delete_inode(struct inode *inode) { } static inline void ext2_xattr_destroy_cache(struct mb_cache *cache) { } #define ext2_xattr_handlers NULL # endif /* CONFIG_EXT2_FS_XATTR */ #ifdef CONFIG_EXT2_FS_SECURITY extern int ext2_init_security(struct inode *inode, struct inode *dir, const struct qstr *qstr); #else static inline int ext2_init_security(struct inode *inode, struct inode *dir, const struct qstr *qstr) { return 0; } #endif 4a9c00980552fe508c'>callback.h
diff options
context:
space:
mode:
authorDexuan Cui <decui@microsoft.com>2017-01-28 11:46:02 -0700
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-01-31 10:59:48 +0100
commit433e19cf33d34bb6751c874a9c00980552fe508c (patch)
treece6547ef2987fbb289fa28f03536328a42781651 /include/xen/interface/callback.h
parent191e885a2e130e639bb0c8ee350d7047294f2ce6 (diff)
Drivers: hv: vmbus: finally fix hv_need_to_signal_on_read()
Commit a389fcfd2cb5 ("Drivers: hv: vmbus: Fix signaling logic in hv_need_to_signal_on_read()") added the proper mb(), but removed the test "prev_write_sz < pending_sz" when making the signal decision. As a result, the guest can signal the host unnecessarily, and then the host can throttle the guest because the host thinks the guest is buggy or malicious; finally the user running stress test can perceive intermittent freeze of the guest. This patch brings back the test, and properly handles the in-place consumption APIs used by NetVSC (see get_next_pkt_raw(), put_pkt_raw() and commit_rd_index()). Fixes: a389fcfd2cb5 ("Drivers: hv: vmbus: Fix signaling logic in hv_need_to_signal_on_read()") Signed-off-by: Dexuan Cui <decui@microsoft.com> Reported-by: Rolf Neugebauer <rolf.neugebauer@docker.com> Tested-by: Rolf Neugebauer <rolf.neugebauer@docker.com> Cc: "K. Y. Srinivasan" <kys@microsoft.com> Cc: Haiyang Zhang <haiyangz@microsoft.com> Cc: Stephen Hemminger <sthemmin@microsoft.com> Cc: <stable@vger.kernel.org> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/xen/interface/callback.h')