On Thu, Oct 10, 2024 at 12:06:17PM +0530, Ojaswin Mujoo wrote: > Extsize is allowed to be set on files with no data in it. For this, > we were checking if the files have extents but missed to check if > delayed extents were present. This patch adds that check. > > While we are at it, also refactor this check into a helper since > its used in some other places as well like xfs_inactive() or > xfs_ioctl_setattr_xflags() > > **Without the patch (SUCCEEDS)** > > $ xfs_io -c 'open -f testfile' -c 'pwrite 0 1024' -c 'extsize 65536' > > wrote 1024/1024 bytes at offset 0 > 1 KiB, 1 ops; 0.0002 sec (4.628 MiB/sec and 4739.3365 ops/sec) > > **With the patch (FAILS as expected)** > > $ xfs_io -c 'open -f testfile' -c 'pwrite 0 1024' -c 'extsize 65536' > > wrote 1024/1024 bytes at offset 0 > 1 KiB, 1 ops; 0.0002 sec (4.628 MiB/sec and 4739.3365 ops/sec) > xfs_io: FS_IOC_FSSETXATTR testfile: Invalid argument > > Reviewed-by: Christoph Hellwig <hch@xxxxxx> > Signed-off-by: Ojaswin Mujoo <ojaswin@xxxxxxxxxxxxx> > --- > > * Changes since v1 * > > - RVB by Christoph > - Added a helper to check if inode has data instead of > open coding. > > v1: > https://lore.kernel.org/linux-xfs/Zv_cTc6cgxszKGy3@xxxxxxxxxxxxx/T/#mf949dafb2b2f63bea1f7c0ce5265a2527aaf22a9 > > fs/xfs/xfs_inode.c | 2 +- > fs/xfs/xfs_inode.h | 5 +++++ > fs/xfs/xfs_ioctl.c | 5 +++-- > 3 files changed, 9 insertions(+), 3 deletions(-) > > diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c > index bcc277fc0a83..3d083a8fd8ed 100644 > --- a/fs/xfs/xfs_inode.c > +++ b/fs/xfs/xfs_inode.c > @@ -1409,7 +1409,7 @@ xfs_inactive( > > if (S_ISREG(VFS_I(ip)->i_mode) && > (ip->i_disk_size != 0 || XFS_ISIZE(ip) != 0 || > - ip->i_df.if_nextents > 0 || ip->i_delayed_blks > 0)) > + xfs_inode_has_data(ip))) > truncate = 1; > > if (xfs_iflags_test(ip, XFS_IQUOTAUNCHECKED)) { > diff --git a/fs/xfs/xfs_inode.h b/fs/xfs/xfs_inode.h > index 97ed912306fd..ae1ccf2a3c8b 100644 > --- a/fs/xfs/xfs_inode.h > +++ b/fs/xfs/xfs_inode.h > @@ -292,6 +292,11 @@ static inline bool xfs_is_cow_inode(struct xfs_inode *ip) > return xfs_is_reflink_inode(ip) || xfs_is_always_cow_inode(ip); > } > > +static inline bool xfs_inode_has_data(struct xfs_inode *ip) Can you please change this to "const struct xfs_inode *ip"? This predicate function doesn't change @ip. I might've called it xfs_inode_has_filedata fwiw, but the current name is fine with me. --D > +{ > + return (ip->i_df.if_nextents > 0 || ip->i_delayed_blks > 0); > +} > + > /* > * Check if an inode has any data in the COW fork. This might be often false > * even for inodes with the reflink flag when there is no pending COW operation. > diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c > index a20d426ef021..88b9c8cf0272 100644 > --- a/fs/xfs/xfs_ioctl.c > +++ b/fs/xfs/xfs_ioctl.c > @@ -481,7 +481,7 @@ xfs_ioctl_setattr_xflags( > > if (rtflag != XFS_IS_REALTIME_INODE(ip)) { > /* Can't change realtime flag if any extents are allocated. */ > - if (ip->i_df.if_nextents || ip->i_delayed_blks) > + if (xfs_inode_has_data(ip)) > return -EINVAL; > > /* > @@ -602,7 +602,8 @@ xfs_ioctl_setattr_check_extsize( > if (!fa->fsx_valid) > return 0; > > - if (S_ISREG(VFS_I(ip)->i_mode) && ip->i_df.if_nextents && > + if (S_ISREG(VFS_I(ip)->i_mode) && > + xfs_inode_has_data(ip) && > XFS_FSB_TO_B(mp, ip->i_extsize) != fa->fsx_extsize) > return -EINVAL; > > -- > 2.43.5 >
