vfs: add vfs_get_fsid() helper
Wrapper around statfs() interface. Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Amir Goldstein <amir73il@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
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14
fs/statfs.c
14
fs/statfs.c
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@ -67,6 +67,20 @@ static int statfs_by_dentry(struct dentry *dentry, struct kstatfs *buf)
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return retval;
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return retval;
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}
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}
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int vfs_get_fsid(struct dentry *dentry, __kernel_fsid_t *fsid)
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{
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struct kstatfs st;
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int error;
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error = statfs_by_dentry(dentry, &st);
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if (error)
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return error;
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*fsid = st.f_fsid;
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return 0;
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}
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EXPORT_SYMBOL(vfs_get_fsid);
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int vfs_statfs(const struct path *path, struct kstatfs *buf)
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int vfs_statfs(const struct path *path, struct kstatfs *buf)
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{
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{
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int error;
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int error;
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@ -41,4 +41,7 @@ struct kstatfs {
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#define ST_NODIRATIME 0x0800 /* do not update directory access times */
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#define ST_NODIRATIME 0x0800 /* do not update directory access times */
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#define ST_RELATIME 0x1000 /* update atime relative to mtime/ctime */
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#define ST_RELATIME 0x1000 /* update atime relative to mtime/ctime */
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struct dentry;
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extern int vfs_get_fsid(struct dentry *dentry, __kernel_fsid_t *fsid);
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#endif
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#endif
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