diff options
Diffstat (limited to 'libglusterfs/src/iatt.h')
| -rw-r--r-- | libglusterfs/src/iatt.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/libglusterfs/src/iatt.h b/libglusterfs/src/iatt.h index eb916ad5edc..60ae5904703 100644 --- a/libglusterfs/src/iatt.h +++ b/libglusterfs/src/iatt.h @@ -265,6 +265,24 @@ iatt_from_stat (struct iatt *iatt, struct stat *stat) iatt->ia_blksize = stat->st_blksize; iatt->ia_blocks = stat->st_blocks; + /* There is a possibility that the backend FS (like XFS) can + allocate blocks beyond EOF for better performance reasons, which + results in 'st_blocks' with higher values than what is consumed by + the file descriptor. This would break few logic inside GlusterFS, + like quota behavior etc, thus we need the exact number of blocks + which are consumed by the file to the higher layers inside GlusterFS. + Currently, this logic won't work for sparse files (ie, file with + holes) + */ + { + uint64_t maxblocks; + + maxblocks = (iatt->ia_size + 511) / 512; + + if (iatt->ia_blocks > maxblocks) + iatt->ia_blocks = maxblocks; + } + iatt->ia_atime = stat->st_atime; iatt->ia_atime_nsec = ST_ATIM_NSEC (stat); |