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afs: Fix large file support

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By default s_maxbytes is set to MAX_NON_LFS, which limits the usable
file size to 2GB, enforced by the vfs.

Commit b9b1f8d593 ("AFS: write support fixes") added support for the
64-bit fetch and store server operations, but did not change this value.
As a result, attempts to write past the 2G mark result in EFBIG errors:

 $ dd if=/dev/zero of=foo bs=1M count=1 seek=2048
 dd: error writing 'foo': File too large

Set s_maxbytes to MAX_LFS_FILESIZE.

Fixes: b9b1f8d593 ("AFS: write support fixes")
Signed-off-by: Marc Dionne <marc.dionne@auristor.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Marc Dionne 2019-11-21 15:37:26 +00:00 committed by Linus Torvalds
parent cd340703c2
commit b485275f1a
1 changed files with 1 additions and 0 deletions
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1
fs/afs/super.c
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@ -435,6 +435,7 @@ static int afs_fill_super(struct super_block *sb, struct afs_fs_context *ctx)
/* fill in the superblock */ /* fill in the superblock */
sb->s_blocksize = PAGE_SIZE; sb->s_blocksize = PAGE_SIZE;
sb->s_blocksize_bits = PAGE_SHIFT; sb->s_blocksize_bits = PAGE_SHIFT;
sb->s_maxbytes = MAX_LFS_FILESIZE;
sb->s_magic = AFS_FS_MAGIC; sb->s_magic = AFS_FS_MAGIC;
sb->s_op = &afs_super_ops; sb->s_op = &afs_super_ops;
if (!as->dyn_root) if (!as->dyn_root)