diff options
Diffstat (limited to 'fs/9p/fid.h')
| -rw-r--r-- | fs/9p/fid.h | 33 |
1 files changed, 32 insertions, 1 deletions
diff --git a/fs/9p/fid.h b/fs/9p/fid.h index 8a4e8cd12ca2..11576e1364bf 100644 --- a/fs/9p/fid.h +++ b/fs/9p/fid.h @@ -7,14 +7,16 @@ #ifndef FS_9P_FID_H #define FS_9P_FID_H #include <linux/list.h> +#include "v9fs.h" +struct p9_fid *v9fs_fid_find_inode(struct inode *inode, bool want_writeable, + kuid_t uid, bool any); struct p9_fid *v9fs_fid_lookup(struct dentry *dentry); static inline struct p9_fid *v9fs_parent_fid(struct dentry *dentry) { return v9fs_fid_lookup(dentry->d_parent); } void v9fs_fid_add(struct dentry *dentry, struct p9_fid **fid); -struct p9_fid *v9fs_writeback_fid(struct dentry *dentry); void v9fs_open_fid_add(struct inode *inode, struct p9_fid **fid); static inline struct p9_fid *clone_fid(struct p9_fid *fid) { @@ -32,4 +34,33 @@ static inline struct p9_fid *v9fs_fid_clone(struct dentry *dentry) p9_fid_put(fid); return nfid; } +/** + * v9fs_fid_addmodes - add cache flags to fid mode (for client use only) + * @fid: fid to augment + * @s_flags: session info mount flags + * @s_cache: session info cache flags + * @f_flags: unix open flags + * + * make sure mode reflects flags of underlying mounts + * also qid.version == 0 reflects a synthetic or legacy file system + * NOTE: these are set after open so only reflect 9p client not + * underlying file system on server. + */ +static inline void v9fs_fid_add_modes(struct p9_fid *fid, int s_flags, + int s_cache, unsigned int f_flags) +{ + if (fid->qid.type != P9_QTFILE) + return; + + if ((!s_cache) || + ((fid->qid.version == 0) && !(s_flags & V9FS_IGNORE_QV)) || + (s_flags & V9FS_DIRECT_IO) || (f_flags & O_DIRECT)) { + fid->mode |= P9L_DIRECT; /* no read or write cache */ + } else if ((s_cache < CACHE_WRITEBACK) || + (f_flags & O_DSYNC) | (s_flags & V9FS_SYNC)) { + fid->mode |= P9L_NOWRITECACHE; + } else if (s_cache == CACHE_LOOSE) { + fid->mode |= P9L_LOOSE; /* noncoherent cache */ + } +} #endif |