| Message ID | 1443549913-8091-4-git-send-email-Anna.Schumaker@Netapp.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
Hi, Anna Schumaker > -----Original Message----- > From: linux-btrfs-owner@vger.kernel.org > [mailto:linux-btrfs-owner@vger.kernel.org] On Behalf Of Anna Schumaker > Sent: Wednesday, September 30, 2015 2:05 AM > To: linux-nfs@vger.kernel.org; linux-btrfs@vger.kernel.org; > linux-fsdevel@vger.kernel.org; linux-api@vger.kernel.org; zab@zabbo.net; > viro@zeniv.linux.org.uk; clm@fb.com; darrick.wong@oracle.com; > mtk.manpages@gmail.com; andros@netapp.com; hch@infradead.org > Subject: [PATCH v4 3/9] btrfs: add .copy_file_range file operation > > From: Zach Brown <zab@redhat.com> > > This rearranges the existing COPY_RANGE ioctl implementation so that > the .copy_file_range file operation can call the core loop that copies file data > extent items. > > The extent copying loop is lifted up into its own function. It retains the core > btrfs error checks that should be shared. > > Signed-off-by: Zach Brown <zab@redhat.com> > Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com> > Reviewed-by: Josef Bacik <jbacik@fb.com> > Reviewed-by: David Sterba <dsterba@suse.com> > --- > fs/btrfs/ctree.h | 3 ++ > fs/btrfs/file.c | 1 + > fs/btrfs/ioctl.c | 91 ++++++++++++++++++++++++++++++++------------------------ > 3 files changed, 56 insertions(+), 39 deletions(-) > > diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index 938efe3..5d06a4f 100644 > --- a/fs/btrfs/ctree.h > +++ b/fs/btrfs/ctree.h > @@ -3996,6 +3996,9 @@ int btrfs_dirty_pages(struct btrfs_root *root, struct > inode *inode, > loff_t pos, size_t write_bytes, > struct extent_state **cached); > int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end); > +ssize_t btrfs_copy_file_range(struct file *file_in, loff_t pos_in, > + struct file *file_out, loff_t pos_out, > + size_t len, int flags); > It is different with declaration: ssize_t (*copy_file_range)(struct file *, loff_t, struct file *, loff_t, size_t, unsigned int); (flags changed from unsigned int to int) > /* tree-defrag.c */ > int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, diff --git > a/fs/btrfs/file.c b/fs/btrfs/file.c index b823fac..b05449c 100644 > --- a/fs/btrfs/file.c > +++ b/fs/btrfs/file.c > @@ -2816,6 +2816,7 @@ const struct file_operations btrfs_file_operations = > { #ifdef CONFIG_COMPAT > .compat_ioctl = btrfs_ioctl, > #endif > + .copy_file_range = btrfs_copy_file_range, And cause compiler warning at this line: fs/btrfs/file.c:2819: warning: initialization from incompatible pointer type Small problem, but better to fix. Thanks Zhaolei > }; > > void btrfs_auto_defrag_exit(void) > diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index 0adf542..4311554 100644 > --- a/fs/btrfs/ioctl.c > +++ b/fs/btrfs/ioctl.c > @@ -3727,17 +3727,16 @@ out: > return ret; > } > > -static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd, > - u64 off, u64 olen, u64 destoff) > +static noinline int btrfs_clone_files(struct file *file, struct file *file_src, > + u64 off, u64 olen, u64 destoff) > { > struct inode *inode = file_inode(file); > + struct inode *src = file_inode(file_src); > struct btrfs_root *root = BTRFS_I(inode)->root; > - struct fd src_file; > - struct inode *src; > int ret; > u64 len = olen; > u64 bs = root->fs_info->sb->s_blocksize; > - int same_inode = 0; > + int same_inode = src == inode; > > /* > * TODO: > @@ -3750,49 +3749,20 @@ static noinline long btrfs_ioctl_clone(struct file > *file, unsigned long srcfd, > * be either compressed or non-compressed. > */ > > - /* the destination must be opened for writing */ > - if (!(file->f_mode & FMODE_WRITE) || (file->f_flags & O_APPEND)) > - return -EINVAL; > - > if (btrfs_root_readonly(root)) > return -EROFS; > > - ret = mnt_want_write_file(file); > - if (ret) > - return ret; > - > - src_file = fdget(srcfd); > - if (!src_file.file) { > - ret = -EBADF; > - goto out_drop_write; > - } > - > - ret = -EXDEV; > - if (src_file.file->f_path.mnt != file->f_path.mnt) > - goto out_fput; > - > - src = file_inode(src_file.file); > - > - ret = -EINVAL; > - if (src == inode) > - same_inode = 1; > - > - /* the src must be open for reading */ > - if (!(src_file.file->f_mode & FMODE_READ)) > - goto out_fput; > + if (file_src->f_path.mnt != file->f_path.mnt || > + src->i_sb != inode->i_sb) > + return -EXDEV; > > /* don't make the dst file partly checksummed */ > if ((BTRFS_I(src)->flags & BTRFS_INODE_NODATASUM) != > (BTRFS_I(inode)->flags & BTRFS_INODE_NODATASUM)) > - goto out_fput; > + return -EINVAL; > > - ret = -EISDIR; > if (S_ISDIR(src->i_mode) || S_ISDIR(inode->i_mode)) > - goto out_fput; > - > - ret = -EXDEV; > - if (src->i_sb != inode->i_sb) > - goto out_fput; > + return -EISDIR; > > if (!same_inode) { > btrfs_double_inode_lock(src, inode); > @@ -3869,6 +3839,49 @@ out_unlock: > btrfs_double_inode_unlock(src, inode); > else > mutex_unlock(&src->i_mutex); > + return ret; > +} > + > +ssize_t btrfs_copy_file_range(struct file *file_in, loff_t pos_in, > + struct file *file_out, loff_t pos_out, > + size_t len, int flags) > +{ > + ssize_t ret; > + > + ret = btrfs_clone_files(file_out, file_in, pos_in, len, pos_out); > + if (ret == 0) > + ret = len; > + return ret; > +} > + > +static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd, > + u64 off, u64 olen, u64 destoff) { > + struct fd src_file; > + int ret; > + > + /* the destination must be opened for writing */ > + if (!(file->f_mode & FMODE_WRITE) || (file->f_flags & O_APPEND)) > + return -EINVAL; > + > + ret = mnt_want_write_file(file); > + if (ret) > + return ret; > + > + src_file = fdget(srcfd); > + if (!src_file.file) { > + ret = -EBADF; > + goto out_drop_write; > + } > + > + /* the src must be open for reading */ > + if (!(src_file.file->f_mode & FMODE_READ)) { > + ret = -EINVAL; > + goto out_fput; > + } > + > + ret = btrfs_clone_files(file, src_file.file, off, olen, destoff); > + > out_fput: > fdput(src_file); > out_drop_write: > -- > 2.5.3 > > -- > To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body > of a message to majordomo@vger.kernel.org More majordomo info at > http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On 09/29/2015 11:20 PM, Zhao Lei wrote: > Hi, Anna Schumaker > >> -----Original Message----- >> From: linux-btrfs-owner@vger.kernel.org >> [mailto:linux-btrfs-owner@vger.kernel.org] On Behalf Of Anna Schumaker >> Sent: Wednesday, September 30, 2015 2:05 AM >> To: linux-nfs@vger.kernel.org; linux-btrfs@vger.kernel.org; >> linux-fsdevel@vger.kernel.org; linux-api@vger.kernel.org; zab@zabbo.net; >> viro@zeniv.linux.org.uk; clm@fb.com; darrick.wong@oracle.com; >> mtk.manpages@gmail.com; andros@netapp.com; hch@infradead.org >> Subject: [PATCH v4 3/9] btrfs: add .copy_file_range file operation >> >> From: Zach Brown <zab@redhat.com> >> >> This rearranges the existing COPY_RANGE ioctl implementation so that >> the .copy_file_range file operation can call the core loop that copies file data >> extent items. >> >> The extent copying loop is lifted up into its own function. It retains the core >> btrfs error checks that should be shared. >> >> Signed-off-by: Zach Brown <zab@redhat.com> >> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com> >> Reviewed-by: Josef Bacik <jbacik@fb.com> >> Reviewed-by: David Sterba <dsterba@suse.com> >> --- >> fs/btrfs/ctree.h | 3 ++ >> fs/btrfs/file.c | 1 + >> fs/btrfs/ioctl.c | 91 ++++++++++++++++++++++++++++++++------------------------ >> 3 files changed, 56 insertions(+), 39 deletions(-) >> >> diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index 938efe3..5d06a4f 100644 >> --- a/fs/btrfs/ctree.h >> +++ b/fs/btrfs/ctree.h >> @@ -3996,6 +3996,9 @@ int btrfs_dirty_pages(struct btrfs_root *root, struct >> inode *inode, >> loff_t pos, size_t write_bytes, >> struct extent_state **cached); >> int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end); >> +ssize_t btrfs_copy_file_range(struct file *file_in, loff_t pos_in, >> + struct file *file_out, loff_t pos_out, >> + size_t len, int flags); >> > > It is different with declaration: > ssize_t (*copy_file_range)(struct file *, loff_t, struct file *, loff_t, size_t, unsigned int); > > (flags changed from unsigned int to int) > >> /* tree-defrag.c */ >> int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, diff --git >> a/fs/btrfs/file.c b/fs/btrfs/file.c index b823fac..b05449c 100644 >> --- a/fs/btrfs/file.c >> +++ b/fs/btrfs/file.c >> @@ -2816,6 +2816,7 @@ const struct file_operations btrfs_file_operations = >> { #ifdef CONFIG_COMPAT >> .compat_ioctl = btrfs_ioctl, >> #endif >> + .copy_file_range = btrfs_copy_file_range, > > And cause compiler warning at this line: > fs/btrfs/file.c:2819: warning: initialization from incompatible pointer type > > Small problem, but better to fix. Thanks! I must have missed it when I switched flags to unsigned int. Anna > > Thanks > Zhaolei > >> }; >> >> void btrfs_auto_defrag_exit(void) >> diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index 0adf542..4311554 100644 >> --- a/fs/btrfs/ioctl.c >> +++ b/fs/btrfs/ioctl.c >> @@ -3727,17 +3727,16 @@ out: >> return ret; >> } >> >> -static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd, >> - u64 off, u64 olen, u64 destoff) >> +static noinline int btrfs_clone_files(struct file *file, struct file *file_src, >> + u64 off, u64 olen, u64 destoff) >> { >> struct inode *inode = file_inode(file); >> + struct inode *src = file_inode(file_src); >> struct btrfs_root *root = BTRFS_I(inode)->root; >> - struct fd src_file; >> - struct inode *src; >> int ret; >> u64 len = olen; >> u64 bs = root->fs_info->sb->s_blocksize; >> - int same_inode = 0; >> + int same_inode = src == inode; >> >> /* >> * TODO: >> @@ -3750,49 +3749,20 @@ static noinline long btrfs_ioctl_clone(struct file >> *file, unsigned long srcfd, >> * be either compressed or non-compressed. >> */ >> >> - /* the destination must be opened for writing */ >> - if (!(file->f_mode & FMODE_WRITE) || (file->f_flags & O_APPEND)) >> - return -EINVAL; >> - >> if (btrfs_root_readonly(root)) >> return -EROFS; >> >> - ret = mnt_want_write_file(file); >> - if (ret) >> - return ret; >> - >> - src_file = fdget(srcfd); >> - if (!src_file.file) { >> - ret = -EBADF; >> - goto out_drop_write; >> - } >> - >> - ret = -EXDEV; >> - if (src_file.file->f_path.mnt != file->f_path.mnt) >> - goto out_fput; >> - >> - src = file_inode(src_file.file); >> - >> - ret = -EINVAL; >> - if (src == inode) >> - same_inode = 1; >> - >> - /* the src must be open for reading */ >> - if (!(src_file.file->f_mode & FMODE_READ)) >> - goto out_fput; >> + if (file_src->f_path.mnt != file->f_path.mnt || >> + src->i_sb != inode->i_sb) >> + return -EXDEV; >> >> /* don't make the dst file partly checksummed */ >> if ((BTRFS_I(src)->flags & BTRFS_INODE_NODATASUM) != >> (BTRFS_I(inode)->flags & BTRFS_INODE_NODATASUM)) >> - goto out_fput; >> + return -EINVAL; >> >> - ret = -EISDIR; >> if (S_ISDIR(src->i_mode) || S_ISDIR(inode->i_mode)) >> - goto out_fput; >> - >> - ret = -EXDEV; >> - if (src->i_sb != inode->i_sb) >> - goto out_fput; >> + return -EISDIR; >> >> if (!same_inode) { >> btrfs_double_inode_lock(src, inode); >> @@ -3869,6 +3839,49 @@ out_unlock: >> btrfs_double_inode_unlock(src, inode); >> else >> mutex_unlock(&src->i_mutex); >> + return ret; >> +} >> + >> +ssize_t btrfs_copy_file_range(struct file *file_in, loff_t pos_in, >> + struct file *file_out, loff_t pos_out, >> + size_t len, int flags) >> +{ >> + ssize_t ret; >> + >> + ret = btrfs_clone_files(file_out, file_in, pos_in, len, pos_out); >> + if (ret == 0) >> + ret = len; >> + return ret; >> +} >> + >> +static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd, >> + u64 off, u64 olen, u64 destoff) { >> + struct fd src_file; >> + int ret; >> + >> + /* the destination must be opened for writing */ >> + if (!(file->f_mode & FMODE_WRITE) || (file->f_flags & O_APPEND)) >> + return -EINVAL; >> + >> + ret = mnt_want_write_file(file); >> + if (ret) >> + return ret; >> + >> + src_file = fdget(srcfd); >> + if (!src_file.file) { >> + ret = -EBADF; >> + goto out_drop_write; >> + } >> + >> + /* the src must be open for reading */ >> + if (!(src_file.file->f_mode & FMODE_READ)) { >> + ret = -EINVAL; >> + goto out_fput; >> + } >> + >> + ret = btrfs_clone_files(file, src_file.file, off, olen, destoff); >> + >> out_fput: >> fdput(src_file); >> out_drop_write: >> -- >> 2.5.3 >> >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body >> of a message to majordomo@vger.kernel.org More majordomo info at >> http://vger.kernel.org/majordomo-info.html > > -- > To unsubscribe from this list: send the line "unsubscribe linux-nfs" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index 938efe3..5d06a4f 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -3996,6 +3996,9 @@ int btrfs_dirty_pages(struct btrfs_root *root, struct inode *inode, loff_t pos, size_t write_bytes, struct extent_state **cached); int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end); +ssize_t btrfs_copy_file_range(struct file *file_in, loff_t pos_in, + struct file *file_out, loff_t pos_out, + size_t len, int flags); /* tree-defrag.c */ int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c index b823fac..b05449c 100644 --- a/fs/btrfs/file.c +++ b/fs/btrfs/file.c @@ -2816,6 +2816,7 @@ const struct file_operations btrfs_file_operations = { #ifdef CONFIG_COMPAT .compat_ioctl = btrfs_ioctl, #endif + .copy_file_range = btrfs_copy_file_range, }; void btrfs_auto_defrag_exit(void) diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index 0adf542..4311554 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -3727,17 +3727,16 @@ out: return ret; } -static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd, - u64 off, u64 olen, u64 destoff) +static noinline int btrfs_clone_files(struct file *file, struct file *file_src, + u64 off, u64 olen, u64 destoff) { struct inode *inode = file_inode(file); + struct inode *src = file_inode(file_src); struct btrfs_root *root = BTRFS_I(inode)->root; - struct fd src_file; - struct inode *src; int ret; u64 len = olen; u64 bs = root->fs_info->sb->s_blocksize; - int same_inode = 0; + int same_inode = src == inode; /* * TODO: @@ -3750,49 +3749,20 @@ static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd, * be either compressed or non-compressed. */ - /* the destination must be opened for writing */ - if (!(file->f_mode & FMODE_WRITE) || (file->f_flags & O_APPEND)) - return -EINVAL; - if (btrfs_root_readonly(root)) return -EROFS; - ret = mnt_want_write_file(file); - if (ret) - return ret; - - src_file = fdget(srcfd); - if (!src_file.file) { - ret = -EBADF; - goto out_drop_write; - } - - ret = -EXDEV; - if (src_file.file->f_path.mnt != file->f_path.mnt) - goto out_fput; - - src = file_inode(src_file.file); - - ret = -EINVAL; - if (src == inode) - same_inode = 1; - - /* the src must be open for reading */ - if (!(src_file.file->f_mode & FMODE_READ)) - goto out_fput; + if (file_src->f_path.mnt != file->f_path.mnt || + src->i_sb != inode->i_sb) + return -EXDEV; /* don't make the dst file partly checksummed */ if ((BTRFS_I(src)->flags & BTRFS_INODE_NODATASUM) != (BTRFS_I(inode)->flags & BTRFS_INODE_NODATASUM)) - goto out_fput; + return -EINVAL; - ret = -EISDIR; if (S_ISDIR(src->i_mode) || S_ISDIR(inode->i_mode)) - goto out_fput; - - ret = -EXDEV; - if (src->i_sb != inode->i_sb) - goto out_fput; + return -EISDIR; if (!same_inode) { btrfs_double_inode_lock(src, inode); @@ -3869,6 +3839,49 @@ out_unlock: btrfs_double_inode_unlock(src, inode); else mutex_unlock(&src->i_mutex); + return ret; +} + +ssize_t btrfs_copy_file_range(struct file *file_in, loff_t pos_in, + struct file *file_out, loff_t pos_out, + size_t len, int flags) +{ + ssize_t ret; + + ret = btrfs_clone_files(file_out, file_in, pos_in, len, pos_out); + if (ret == 0) + ret = len; + return ret; +} + +static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd, + u64 off, u64 olen, u64 destoff) +{ + struct fd src_file; + int ret; + + /* the destination must be opened for writing */ + if (!(file->f_mode & FMODE_WRITE) || (file->f_flags & O_APPEND)) + return -EINVAL; + + ret = mnt_want_write_file(file); + if (ret) + return ret; + + src_file = fdget(srcfd); + if (!src_file.file) { + ret = -EBADF; + goto out_drop_write; + } + + /* the src must be open for reading */ + if (!(src_file.file->f_mode & FMODE_READ)) { + ret = -EINVAL; + goto out_fput; + } + + ret = btrfs_clone_files(file, src_file.file, off, olen, destoff); + out_fput: fdput(src_file); out_drop_write: