diff options
Diffstat (limited to 'fs/xfs/libxfs/xfs_fs.h')
| -rw-r--r-- | fs/xfs/libxfs/xfs_fs.h | 31 |
1 files changed, 29 insertions, 2 deletions
diff --git a/fs/xfs/libxfs/xfs_fs.h b/fs/xfs/libxfs/xfs_fs.h index 454b63ef7201..860284064c5a 100644 --- a/fs/xfs/libxfs/xfs_fs.h +++ b/fs/xfs/libxfs/xfs_fs.h @@ -8,6 +8,7 @@ /* * SGI's XFS filesystem's major stuff (constants, structures) + * NOTE: This file must be compile-able with C++ compilers. */ /* @@ -826,6 +827,30 @@ struct xfs_exchange_range { }; /* + * Using the same definition of file2 as struct xfs_exchange_range, commit the + * contents of file1 into file2 if file2 has the same inode number, mtime, and + * ctime as the arguments provided to the call. The old contents of file2 will + * be moved to file1. + * + * Returns -EBUSY if there isn't an exact match for the file2 fields. + * + * Filesystems must be able to restart and complete the operation even after + * the system goes down. + */ +struct xfs_commit_range { + __s32 file1_fd; + __u32 pad; /* must be zeroes */ + __u64 file1_offset; /* file1 offset, bytes */ + __u64 file2_offset; /* file2 offset, bytes */ + __u64 length; /* bytes to exchange */ + + __u64 flags; /* see XFS_EXCHANGE_RANGE_* below */ + + /* opaque file2 metadata for freshness checks */ + __u64 file2_freshness[6]; +}; + +/* * Exchange file data all the way to the ends of both files, and then exchange * the file sizes. This flag can be used to replace a file's contents with a * different amount of data. length will be ignored. @@ -906,13 +931,13 @@ static inline struct xfs_getparents_rec * xfs_getparents_next_rec(struct xfs_getparents *gp, struct xfs_getparents_rec *gpr) { - void *next = ((void *)gpr + gpr->gpr_reclen); + void *next = ((char *)gpr + gpr->gpr_reclen); void *end = (void *)(uintptr_t)(gp->gp_buffer + gp->gp_bufsize); if (next >= end) return NULL; - return next; + return (struct xfs_getparents_rec *)next; } /* Iterate through this file handle's directory parent pointers. */ @@ -997,6 +1022,8 @@ struct xfs_getparents_by_handle { #define XFS_IOC_BULKSTAT _IOR ('X', 127, struct xfs_bulkstat_req) #define XFS_IOC_INUMBERS _IOR ('X', 128, struct xfs_inumbers_req) #define XFS_IOC_EXCHANGE_RANGE _IOW ('X', 129, struct xfs_exchange_range) +#define XFS_IOC_START_COMMIT _IOR ('X', 130, struct xfs_commit_range) +#define XFS_IOC_COMMIT_RANGE _IOW ('X', 131, struct xfs_commit_range) /* XFS_IOC_GETFSUUID ---------- deprecated 140 */ |