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authorUlrich Drepper <drepper@redhat.com>2007-07-23 18:43:46 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-07-24 12:24:58 -0700
commit0d786d4a2773f06a791e8c3730d049077fb81df6 (patch)
treede553420b6b1a70b80034385ff94eb706bac12ab
parent4f640efb3170dbcf99a37a3cc99060647b95428c (diff)
fallocate syscall interface deficiency
The fallocate syscall returns ENOSYS in case the filesystem does not support the operation and expects the userlevel code to fill in. This is good in concept. The problem is that the libc code for old kernels should be able to distinguish the case where the syscall is not at all available vs not functioning for a specific mount point. As is this is not possible and we always have to invoke the syscall even if the kernel doesn't support it. I suggest the following patch. Using EOPNOTSUPP is IMO the right thing to do. Cc: Amit Arora <aarora@in.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--fs/open.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/open.c b/fs/open.c
index a6b054edacb..e27c205364d 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -403,7 +403,7 @@ asmlinkage long sys_fallocate(int fd, int mode, loff_t offset, loff_t len)
if (inode->i_op && inode->i_op->fallocate)
ret = inode->i_op->fallocate(inode, mode, offset, len);
else
- ret = -ENOSYS;
+ ret = -EOPNOTSUPP;
out_fput:
fput(file);