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| author | Amir Goldstein | 2017-01-17 05:34:53 +0100 |
|---|---|---|
| committer | Miklos Szeredi | 2017-02-07 15:47:14 +0100 |
| commit | e7f52429b4a5b2e3224948d1737eb264c8f7e15f (patch) | |
| tree | c3d1a5bec15caa0f01768772f9bc7334ff7dfd43 /fs/overlayfs/overlayfs.h | |
| parent | vfs: wrap write f_ops with file_{start,end}_write() (diff) | |
| download | kernel-qcow2-linux-e7f52429b4a5b2e3224948d1737eb264c8f7e15f.tar.gz kernel-qcow2-linux-e7f52429b4a5b2e3224948d1737eb264c8f7e15f.tar.xz kernel-qcow2-linux-e7f52429b4a5b2e3224948d1737eb264c8f7e15f.zip | |
ovl: check if upperdir fs supports O_TMPFILE
This is needed for choosing between concurrent copyup
using O_TMPFILE and legacy copyup using workdir+rename.
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Diffstat (limited to 'fs/overlayfs/overlayfs.h')
| -rw-r--r-- | fs/overlayfs/overlayfs.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/fs/overlayfs/overlayfs.h b/fs/overlayfs/overlayfs.h index 8af450b0e57a..3822a909ce1f 100644 --- a/fs/overlayfs/overlayfs.h +++ b/fs/overlayfs/overlayfs.h @@ -127,6 +127,15 @@ static inline int ovl_do_whiteout(struct inode *dir, struct dentry *dentry) return err; } +static inline struct dentry *ovl_do_tmpfile(struct dentry *dentry, umode_t mode) +{ + struct dentry *ret = vfs_tmpfile(dentry, mode, 0); + int err = IS_ERR(ret) ? PTR_ERR(ret) : 0; + + pr_debug("tmpfile(%pd2, 0%o) = %i\n", dentry, mode, err); + return ret; +} + static inline struct inode *ovl_inode_real(struct inode *inode, bool *is_upper) { unsigned long x = (unsigned long) READ_ONCE(inode->i_private); |