https://bugzilla.kernel.org/show_bug.cgi?id=205957 Andreas Dilger (adilger.kernelbugzilla@xxxxxxxxx) changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |adilger.kernelbugzilla@dilg | |er.ca --- Comment #2 from Andreas Dilger (adilger.kernelbugzilla@xxxxxxxxx) --- IMHO, it is broken to be calling a 64-bit interface like getdents64() and then be unhappy when it is returning 64-bit values. As previously stated, it would be possible to add a "32bitapi" mount option to force ext4 to always return 32-bit offset values, as is done with NFS. The alternative is for QEMU's telldir() to see that d_off is a 64-bit value, but is exporting a 32-bit interface and downshift the offset to fit into a 32-bit field. It would store a '64BITOFFSET' flag in the file descriptor in this case, and if seekdir() is called on that fd it will upshift the offset to a 64-bit value again. That will lose the low bits of the offset, but that is unlikely to be noticeable until there are more than 65000 entries in a directory. Since the hash values are uniformly distributed, they will almost immediately exceed 32 bits, and telldir() is uncommon for use after the first entry is read, so this detection will work reliably. -- You are receiving this mail because: You are watching the assignee of the bug.
