From 3a2e176905b1a8d1b51cbfda719058f5ce893efd Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Fri, 13 Nov 2015 09:38:46 +0100 Subject: nfs: offer native ioctls even if CONFIG_COMPAT is set Without this for example 64-bit binaries on typical amd64 distributions would not be able to use ioctls on NFS. For now this only affects clones. Additionally ->compat_ioctl is defined even for non-compat builds, so get rid of the pointless ifdef. Signed-off-by: Christoph Hellwig Signed-off-by: Trond Myklebust --- fs/nfs/nfs4file.c | 3 --- 1 file changed, 3 deletions(-) (limited to 'fs/nfs/nfs4file.c') diff --git a/fs/nfs/nfs4file.c b/fs/nfs/nfs4file.c index 4aa571956cd6..e45f686a5a60 100644 --- a/fs/nfs/nfs4file.c +++ b/fs/nfs/nfs4file.c @@ -347,9 +347,6 @@ const struct file_operations nfs4_file_operations = { #endif /* CONFIG_NFS_V4_2 */ .check_flags = nfs_check_flags, .setlease = simple_nosetlease, -#ifdef CONFIG_COMPAT .unlocked_ioctl = nfs4_ioctl, -#else .compat_ioctl = nfs4_ioctl, -#endif /* CONFIG_COMPAT */ }; -- cgit From 21fad313d5890b674432fe3ad0c7bcf040320340 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Fri, 13 Nov 2015 09:38:47 +0100 Subject: nfs: allow intra-file CLONE Originally CLONE didn't allow for intra-file clones, but we recently updated the spec to support this feature which is also supported by local Linux file systems. Signed-off-by: Christoph Hellwig Signed-off-by: Trond Myklebust --- fs/nfs/nfs4file.c | 19 ++++++++++++++----- 1 file changed, 14 insertions(+), 5 deletions(-) (limited to 'fs/nfs/nfs4file.c') diff --git a/fs/nfs/nfs4file.c b/fs/nfs/nfs4file.c index e45f686a5a60..61f1c1c02d06 100644 --- a/fs/nfs/nfs4file.c +++ b/fs/nfs/nfs4file.c @@ -203,6 +203,7 @@ nfs42_ioctl_clone(struct file *dst_file, unsigned long srcfd, struct fd src_file; struct inode *src_inode; unsigned int bs = server->clone_blksize; + bool same_inode = false; int ret; /* dst file must be opened for writing */ @@ -221,10 +222,8 @@ nfs42_ioctl_clone(struct file *dst_file, unsigned long srcfd, src_inode = file_inode(src_file.file); - /* src and dst must be different files */ - ret = -EINVAL; if (src_inode == dst_inode) - goto out_fput; + same_inode = true; /* src file must be opened for reading */ if (!(src_file.file->f_mode & FMODE_READ)) @@ -249,8 +248,16 @@ nfs42_ioctl_clone(struct file *dst_file, unsigned long srcfd, goto out_fput; } + /* verify if ranges are overlapped within the same file */ + if (same_inode) { + if (dst_off + count > src_off && dst_off < src_off + count) + goto out_fput; + } + /* XXX: do we lock at all? what if server needs CB_RECALL_LAYOUT? */ - if (dst_inode < src_inode) { + if (same_inode) { + mutex_lock(&src_inode->i_mutex); + } else if (dst_inode < src_inode) { mutex_lock_nested(&dst_inode->i_mutex, I_MUTEX_PARENT); mutex_lock_nested(&src_inode->i_mutex, I_MUTEX_CHILD); } else { @@ -275,7 +282,9 @@ nfs42_ioctl_clone(struct file *dst_file, unsigned long srcfd, truncate_inode_pages_range(&dst_inode->i_data, dst_off, dst_off + count - 1); out_unlock: - if (dst_inode < src_inode) { + if (same_inode) { + mutex_unlock(&src_inode->i_mutex); + } else if (dst_inode < src_inode) { mutex_unlock(&src_inode->i_mutex); mutex_unlock(&dst_inode->i_mutex); } else { -- cgit From 0f42a6a9b807b092841f7e1b381f8c7e80a0d86a Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Fri, 13 Nov 2015 09:38:48 +0100 Subject: nfs: use btrfs ioctl defintions for clone The NFS CLONE_RANGE defintion was wrong and thus never worked. Fix this by simply using the btrfs ioctl defintion. Signed-off-by: Christoph Hellwig Signed-off-by: Trond Myklebust --- fs/nfs/nfs4file.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) (limited to 'fs/nfs/nfs4file.c') diff --git a/fs/nfs/nfs4file.c b/fs/nfs/nfs4file.c index 61f1c1c02d06..135353074c25 100644 --- a/fs/nfs/nfs4file.c +++ b/fs/nfs/nfs4file.c @@ -7,6 +7,7 @@ #include #include #include +#include /* BTRFS_IOC_CLONE/BTRFS_IOC_CLONE_RANGE */ #include "delegation.h" #include "internal.h" #include "iostat.h" @@ -300,12 +301,13 @@ out_drop_write: static long nfs42_ioctl_clone_range(struct file *dst_file, void __user *argp) { - struct nfs_ioctl_clone_range_args args; + struct btrfs_ioctl_clone_range_args args; if (copy_from_user(&args, argp, sizeof(args))) return -EFAULT; - return nfs42_ioctl_clone(dst_file, args.src_fd, args.src_off, args.dst_off, args.count); + return nfs42_ioctl_clone(dst_file, args.src_fd, args.src_offset, + args.dest_offset, args.src_length); } #else static long nfs42_ioctl_clone(struct file *dst_file, unsigned long srcfd, @@ -325,9 +327,9 @@ long nfs4_ioctl(struct file *file, unsigned int cmd, unsigned long arg) void __user *argp = (void __user *)arg; switch (cmd) { - case NFS_IOC_CLONE: + case BTRFS_IOC_CLONE: return nfs42_ioctl_clone(file, arg, 0, 0, 0); - case NFS_IOC_CLONE_RANGE: + case BTRFS_IOC_CLONE_RANGE: return nfs42_ioctl_clone_range(file, argp); } -- cgit From 6b7153da2c1a58b0e809a8c50bcc3bab7374ce7b Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Fri, 13 Nov 2015 09:38:49 +0100 Subject: nfs: reduce the amount of ifdefs for v4.2 in nfs4file.c Signed-off-by: Christoph Hellwig Signed-off-by: Trond Myklebust --- fs/nfs/nfs4file.c | 27 +++++++-------------------- 1 file changed, 7 insertions(+), 20 deletions(-) (limited to 'fs/nfs/nfs4file.c') diff --git a/fs/nfs/nfs4file.c b/fs/nfs/nfs4file.c index 135353074c25..db9b5fea5b3e 100644 --- a/fs/nfs/nfs4file.c +++ b/fs/nfs/nfs4file.c @@ -309,18 +309,6 @@ static long nfs42_ioctl_clone_range(struct file *dst_file, void __user *argp) return nfs42_ioctl_clone(dst_file, args.src_fd, args.src_offset, args.dest_offset, args.src_length); } -#else -static long nfs42_ioctl_clone(struct file *dst_file, unsigned long srcfd, - u64 src_off, u64 dst_off, u64 count) -{ - return -ENOTTY; -} - -static long nfs42_ioctl_clone_range(struct file *dst_file, void __user *argp) -{ - return -ENOTTY; -} -#endif /* CONFIG_NFS_V4_2 */ long nfs4_ioctl(struct file *file, unsigned int cmd, unsigned long arg) { @@ -335,13 +323,9 @@ long nfs4_ioctl(struct file *file, unsigned int cmd, unsigned long arg) return -ENOTTY; } +#endif /* CONFIG_NFS_V4_2 */ const struct file_operations nfs4_file_operations = { -#ifdef CONFIG_NFS_V4_2 - .llseek = nfs4_file_llseek, -#else - .llseek = nfs_file_llseek, -#endif .read_iter = nfs_file_read, .write_iter = nfs_file_write, .mmap = nfs_file_mmap, @@ -353,11 +337,14 @@ const struct file_operations nfs4_file_operations = { .flock = nfs_flock, .splice_read = nfs_file_splice_read, .splice_write = iter_file_splice_write, -#ifdef CONFIG_NFS_V4_2 - .fallocate = nfs42_fallocate, -#endif /* CONFIG_NFS_V4_2 */ .check_flags = nfs_check_flags, .setlease = simple_nosetlease, +#ifdef CONFIG_NFS_V4_2 + .llseek = nfs4_file_llseek, + .fallocate = nfs42_fallocate, .unlocked_ioctl = nfs4_ioctl, .compat_ioctl = nfs4_ioctl, +#else + .llseek = nfs_file_llseek, +#endif }; -- cgit