From: Junjiro Okajima <hooanon05@xxxxxxxxxxx> initial commit sub-routines or simple wrappers for VFS Signed-off-by: Junjiro Okajima <hooanon05@xxxxxxxxxxx> --- fs/aufs/vfsub.c | 633 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ fs/aufs/vfsub.h | 472 +++++++++++++++++++++++++++++++++++++++++ 2 files changed, 1105 insertions(+), 0 deletions(-) create mode 100644 fs/aufs/vfsub.c create mode 100644 fs/aufs/vfsub.h diff --git a/fs/aufs/vfsub.c b/fs/aufs/vfsub.c new file mode 100644 index 0000000..bc3ce64 --- /dev/null +++ b/fs/aufs/vfsub.c @@ -0,0 +1,633 @@ +/* + * Copyright (C) 2007-2008 Junjiro Okajima + * + * This program, aufs is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +/* + * sub-routines for VFS + */ + +#include <linux/uaccess.h> +#include "aufs.h" + +/* ---------------------------------------------------------------------- */ + +void vfsub_args_init(struct vfsub_args *vargs, struct au_hin_ignore *ign, + int dlgt, int force_unlink) +{ + do_vfsub_args_reinit(vargs, ign); + vargs->flags = 0; + if (unlikely(dlgt)) + vfsub_fset(vargs->flags, DLGT); + if (force_unlink) + vfsub_fset(vargs->flags, FORCE_UNLINK); +} + +/* ---------------------------------------------------------------------- */ + +struct file *vfsub_filp_open(const char *path, int oflags, int mode) +{ + struct file *err; + + LKTRTrace("%s\n", path); + + lockdep_off(); + err = filp_open(path, oflags, mode); + lockdep_on(); + if (!IS_ERR(err)) + au_update_fuse_h_inode(err->f_vfsmnt, err->f_dentry); /*ignore*/ + return err; +} + +int vfsub_path_lookup(const char *name, unsigned int flags, + struct nameidata *nd) +{ + int err; + + LKTRTrace("%s\n", name); + + /* lockdep_off(); */ + err = path_lookup(name, flags, nd); + /* lockdep_on(); */ + if (!err) + au_update_fuse_h_inode(nd->path.mnt, nd->path.dentry); + /*ignore*/ + return err; +} + +struct dentry *vfsub_lookup_one_len(const char *name, struct dentry *parent, + int len) +{ + struct dentry *d; + + LKTRTrace("%.*s/%.*s\n", AuDLNPair(parent), len, name); + IMustLock(parent->d_inode); + + d = lookup_one_len(name, parent, len); + if (!IS_ERR(d)) + au_update_fuse_h_inode(NULL, d); /*ignore*/ + return d; +} + +struct dentry *vfsub__lookup_hash(struct qstr *name, struct dentry *parent, + struct nameidata *nd) +{ + struct dentry *d; + + LKTRTrace("%.*s/%.*s, nd %d\n", + AuDLNPair(parent), AuLNPair(name), !!nd); + if (nd) + LKTRTrace("nd{0x%x}\n", nd->flags); + IMustLock(parent->d_inode); + + d = __lookup_hash(name, parent, nd); + if (!IS_ERR(d)) + au_update_fuse_h_inode(NULL, d); /*ignore*/ + return d; +} + +/* ---------------------------------------------------------------------- */ + +int do_vfsub_create(struct inode *dir, struct dentry *dentry, int mode, + struct nameidata *nd) +{ + int err; + struct vfsmount *mnt; + + LKTRTrace("i%lu, %.*s, 0x%x\n", dir->i_ino, AuDLNPair(dentry), mode); + IMustLock(dir); + + err = vfs_create(dir, dentry, mode, nd); + if (!err) { + mnt = NULL; + if (nd) + mnt = nd->path.mnt; + /* dir inode is locked */ + au_update_fuse_h_inode(mnt, dentry->d_parent); /*ignore*/ + au_update_fuse_h_inode(mnt, dentry); /*ignore*/ + } + return err; +} + +int do_vfsub_symlink(struct inode *dir, struct dentry *dentry, + const char *symname, int mode) +{ + int err; + + LKTRTrace("i%lu, %.*s, %s, 0x%x\n", + dir->i_ino, AuDLNPair(dentry), symname, mode); + IMustLock(dir); + + err = vfs_symlink(dir, dentry, symname, mode); + if (!err) { + /* dir inode is locked */ + au_update_fuse_h_inode(NULL, dentry->d_parent); /*ignore*/ + au_update_fuse_h_inode(NULL, dentry); /*ignore*/ + } + return err; +} + +int do_vfsub_mknod(struct inode *dir, struct dentry *dentry, int mode, + dev_t dev) +{ + int err; + + LKTRTrace("i%lu, %.*s, 0x%x\n", dir->i_ino, AuDLNPair(dentry), mode); + IMustLock(dir); + + err = vfs_mknod(dir, dentry, mode, dev); + if (!err) { + /* dir inode is locked */ + au_update_fuse_h_inode(NULL, dentry->d_parent); /*ignore*/ + au_update_fuse_h_inode(NULL, dentry); /*ignore*/ + } + return err; +} + +int do_vfsub_link(struct dentry *src_dentry, struct inode *dir, + struct dentry *dentry) +{ + int err; + + LKTRTrace("%.*s, i%lu, %.*s\n", + AuDLNPair(src_dentry), dir->i_ino, AuDLNPair(dentry)); + IMustLock(dir); + + lockdep_off(); + err = vfs_link(src_dentry, dir, dentry); + lockdep_on(); + if (!err) { + LKTRTrace("src_i %p, dst_i %p\n", + src_dentry->d_inode, dentry->d_inode); + /* fuse has different memory inode for the same inumber */ + au_update_fuse_h_inode(NULL, src_dentry); /*ignore*/ + /* dir inode is locked */ + au_update_fuse_h_inode(NULL, dentry->d_parent); /*ignore*/ + au_update_fuse_h_inode(NULL, dentry); /*ignore*/ + } + return err; +} + +int do_vfsub_rename(struct inode *src_dir, struct dentry *src_dentry, + struct inode *dir, struct dentry *dentry) +{ + int err; + + LKTRTrace("i%lu, %.*s, i%lu, %.*s\n", + src_dir->i_ino, AuDLNPair(src_dentry), + dir->i_ino, AuDLNPair(dentry)); + IMustLock(dir); + IMustLock(src_dir); + + lockdep_off(); + err = vfs_rename(src_dir, src_dentry, dir, dentry); + lockdep_on(); + if (!err) { + /* dir inode is locked */ + au_update_fuse_h_inode(NULL, dentry->d_parent); /*ignore*/ + au_update_fuse_h_inode(NULL, src_dentry->d_parent); /*ignore*/ + au_update_fuse_h_inode(NULL, src_dentry); /*ignore*/ + } + return err; +} + +int do_vfsub_mkdir(struct inode *dir, struct dentry *dentry, int mode) +{ + int err; + + LKTRTrace("i%lu, %.*s, 0x%x\n", dir->i_ino, AuDLNPair(dentry), mode); + IMustLock(dir); + + err = vfs_mkdir(dir, dentry, mode); + if (!err) { + /* dir inode is locked */ + au_update_fuse_h_inode(NULL, dentry->d_parent); /*ignore*/ + au_update_fuse_h_inode(NULL, dentry); /*ignore*/ + } + return err; +} + +int do_vfsub_rmdir(struct inode *dir, struct dentry *dentry) +{ + int err; + + LKTRTrace("i%lu, %.*s\n", dir->i_ino, AuDLNPair(dentry)); + IMustLock(dir); + + lockdep_off(); + err = vfs_rmdir(dir, dentry); + lockdep_on(); + /* dir inode is locked */ + if (!err) + au_update_fuse_h_inode(NULL, dentry->d_parent); /*ignore*/ + return err; +} + +int do_vfsub_unlink(struct inode *dir, struct dentry *dentry) +{ + int err; + + LKTRTrace("i%lu, %.*s\n", dir->i_ino, AuDLNPair(dentry)); + IMustLock(dir); + + /* vfs_unlink() locks inode */ + lockdep_off(); + err = vfs_unlink(dir, dentry); + lockdep_on(); + /* dir inode is locked */ + if (!err) + au_update_fuse_h_inode(NULL, dentry->d_parent); /*ignore*/ + return err; +} + +/* ---------------------------------------------------------------------- */ + +ssize_t do_vfsub_read_u(struct file *file, char __user *ubuf, size_t count, + loff_t *ppos) +{ + ssize_t err; + + LKTRTrace("%.*s, cnt %lu, pos %Ld\n", + AuDLNPair(file->f_dentry), (unsigned long)count, *ppos); + + if (0 /*!au_test_nfs(file->f_vfsmnt->mnt_sb)*/) + err = vfs_read(file, ubuf, count, ppos); + else { + lockdep_off(); + err = vfs_read(file, ubuf, count, ppos); + lockdep_on(); + } + if (err >= 0) + au_update_fuse_h_inode(file->f_vfsmnt, file->f_dentry); + /*ignore*/ + return err; +} + +/* todo: kernel_read()? */ +ssize_t do_vfsub_read_k(struct file *file, void *kbuf, size_t count, + loff_t *ppos) +{ + ssize_t err; + mm_segment_t oldfs; + + oldfs = get_fs(); + set_fs(KERNEL_DS); + err = do_vfsub_read_u(file, (char __user *)kbuf, count, ppos); + set_fs(oldfs); + return err; +} + +ssize_t do_vfsub_write_u(struct file *file, const char __user *ubuf, + size_t count, loff_t *ppos) +{ + ssize_t err; + + LKTRTrace("%.*s, cnt %lu, pos %Ld\n", + AuDLNPair(file->f_dentry), (unsigned long)count, *ppos); + + lockdep_off(); + err = vfs_write(file, ubuf, count, ppos); + lockdep_on(); + if (err >= 0) + au_update_fuse_h_inode(file->f_vfsmnt, file->f_dentry); + /*ignore*/ + return err; +} + +ssize_t do_vfsub_write_k(struct file *file, void *kbuf, size_t count, + loff_t *ppos) +{ + ssize_t err; + mm_segment_t oldfs; + + oldfs = get_fs(); + set_fs(KERNEL_DS); + err = do_vfsub_write_u(file, (const char __user *)kbuf, count, ppos); + set_fs(oldfs); + return err; +} + +int do_vfsub_readdir(struct file *file, filldir_t filldir, void *arg) +{ + int err; + + LKTRTrace("%.*s\n", AuDLNPair(file->f_dentry)); + + lockdep_off(); + err = vfs_readdir(file, filldir, arg); + lockdep_on(); + if (err >= 0) + au_update_fuse_h_inode(file->f_vfsmnt, file->f_dentry); + /*ignore*/ + return err; +} + +long do_vfsub_splice_to(struct file *in, loff_t *ppos, + struct pipe_inode_info *pipe, size_t len, + unsigned int flags) +{ + long err; + + LKTRTrace("%.*s, pos %Ld, len %lu, 0x%x\n", + AuDLNPair(in->f_dentry), *ppos, (unsigned long)len, flags); + + lockdep_off(); + err = vfs_splice_to(in, ppos, pipe, len, flags); + lockdep_on(); + if (err >= 0) + au_update_fuse_h_inode(in->f_vfsmnt, in->f_dentry); /*ignore*/ + return err; +} + +long do_vfsub_splice_from(struct pipe_inode_info *pipe, struct file *out, + loff_t *ppos, size_t len, unsigned int flags) +{ + long err; + + LKTRTrace("%.*s, pos %Ld, len %lu, 0x%x\n", + AuDLNPair(out->f_dentry), *ppos, (unsigned long)len, flags); + + lockdep_off(); + err = vfs_splice_from(pipe, out, ppos, len, flags); + lockdep_on(); + if (err >= 0) + au_update_fuse_h_inode(out->f_vfsmnt, out->f_dentry); /*ignore*/ + return err; +} + +/* ---------------------------------------------------------------------- */ + +struct au_vfsub_mkdir_args { + int *errp; + struct inode *dir; + struct dentry *dentry; + int mode; + int dlgt; +}; + +static void au_call_vfsub_mkdir(void *args) +{ + struct au_vfsub_mkdir_args *a = args; + *a->errp = vfsub_mkdir(a->dir, a->dentry, a->mode, a->dlgt); +} + +int vfsub_sio_mkdir(struct inode *dir, struct dentry *dentry, int mode, + int dlgt) +{ + int err, do_sio, wkq_err; + + LKTRTrace("i%lu, %.*s\n", dir->i_ino, AuDLNPair(dentry)); + + do_sio = au_test_h_perm_sio(dir, MAY_EXEC | MAY_WRITE, dlgt); + if (!do_sio) + err = vfsub_mkdir(dir, dentry, mode, dlgt); + else { + struct au_vfsub_mkdir_args args = { + .errp = &err, + .dir = dir, + .dentry = dentry, + .mode = mode, + .dlgt = dlgt + }; + wkq_err = au_wkq_wait(au_call_vfsub_mkdir, &args, /*dlgt*/0); + if (unlikely(wkq_err)) + err = wkq_err; + } + + AuTraceErr(err); + return err; +} + +struct au_vfsub_rmdir_args { + int *errp; + struct inode *dir; + struct dentry *dentry; + struct vfsub_args *vargs; +}; + +static void au_call_vfsub_rmdir(void *args) +{ + struct au_vfsub_rmdir_args *a = args; + *a->errp = vfsub_rmdir(a->dir, a->dentry, a->vargs); +} + +int vfsub_sio_rmdir(struct inode *dir, struct dentry *dentry, int dlgt) +{ + int err, do_sio, wkq_err; + struct vfsub_args vargs; + + LKTRTrace("i%lu, %.*s\n", dir->i_ino, AuDLNPair(dentry)); + + vfsub_args_init(&vargs, /*ign*/NULL, dlgt, /*force_unlink*/0); + do_sio = au_test_h_perm_sio(dir, MAY_EXEC | MAY_WRITE, dlgt); + if (!do_sio) + err = vfsub_rmdir(dir, dentry, &vargs); + else { + struct au_vfsub_rmdir_args args = { + .errp = &err, + .dir = dir, + .dentry = dentry, + .vargs = &vargs + }; + wkq_err = au_wkq_wait(au_call_vfsub_rmdir, &args, /*dlgt*/0); + if (unlikely(wkq_err)) + err = wkq_err; + } + + AuTraceErr(err); + return err; +} + +/* ---------------------------------------------------------------------- */ + +struct notify_change_args { + int *errp; + struct dentry *h_dentry; + struct iattr *ia; + struct vfsub_args *vargs; +}; + +static void call_notify_change(void *args) +{ + struct notify_change_args *a = args; + struct inode *h_inode; + + LKTRTrace("%.*s, ia_valid 0x%x\n", + AuDLNPair(a->h_dentry), a->ia->ia_valid); + h_inode = a->h_dentry->d_inode; + IMustLock(h_inode); + + *a->errp = -EPERM; + if (!IS_IMMUTABLE(h_inode) && !IS_APPEND(h_inode)) { + vfsub_ignore(a->vargs); + lockdep_off(); + *a->errp = notify_change(a->h_dentry, a->ia); + lockdep_on(); + if (!*a->errp) + au_update_fuse_h_inode(NULL, a->h_dentry); /*ignore*/ + else + vfsub_unignore(a->vargs); + } + AuTraceErr(*a->errp); +} + +#ifdef CONFIG_AUFS_DLGT +static void vfsub_notify_change_dlgt(struct notify_change_args *args, + unsigned int flags) +{ + if (!vfsub_ftest(flags, DLGT)) + call_notify_change(args); + else { + int wkq_err; + wkq_err = au_wkq_wait(call_notify_change, args, /*dlgt*/1); + if (unlikely(wkq_err)) + *args->errp = wkq_err; + } +} +#else +static void vfsub_notify_change_dlgt(struct notify_change_args *args, + unsigned int flags) +{ + call_notify_change(args); +} +#endif + +int vfsub_notify_change(struct dentry *dentry, struct iattr *ia, + struct vfsub_args *vargs) +{ + int err; + struct notify_change_args args = { + .errp = &err, + .h_dentry = dentry, + .ia = ia, + .vargs = vargs + }; + + vfsub_notify_change_dlgt(&args, vargs->flags); + + AuTraceErr(err); + return err; +} + +/* ---------------------------------------------------------------------- */ + +struct unlink_args { + int *errp; + struct inode *dir; + struct dentry *dentry; + struct vfsub_args *vargs; +}; + +static void call_unlink(void *args) +{ + struct unlink_args *a = args; + struct inode *h_inode; + const int stop_sillyrename = (au_test_nfs(a->dentry->d_sb) + && atomic_read(&a->dentry->d_count) == 1); + + LKTRTrace("%.*s, stop_silly %d, cnt %d\n", + AuDLNPair(a->dentry), stop_sillyrename, + atomic_read(&a->dentry->d_count)); + + if (!stop_sillyrename) + dget(a->dentry); + h_inode = a->dentry->d_inode; + if (h_inode) + atomic_inc_return(&h_inode->i_count); + *a->errp = do_vfsub_unlink(a->dir, a->dentry); + if (!stop_sillyrename) + dput(a->dentry); + if (h_inode) + iput(h_inode); + + AuTraceErr(*a->errp); +} + +/* + * @dir: must be locked. + * @dentry: target dentry. + */ +int vfsub_unlink(struct inode *dir, struct dentry *dentry, + struct vfsub_args *vargs) +{ + int err; + struct unlink_args args = { + .errp = &err, + .dir = dir, + .dentry = dentry, + .vargs = vargs + }; + + if (!vfsub_ftest(vargs->flags, DLGT) + && !vfsub_ftest(vargs->flags, FORCE_UNLINK)) + call_unlink(&args); + else { + int wkq_err; + wkq_err = au_wkq_wait(call_unlink, &args, + vfsub_ftest(vargs->flags, DLGT)); + if (unlikely(wkq_err)) + err = wkq_err; + } + + return err; +} + +/* ---------------------------------------------------------------------- */ + +struct statfs_args { + int *errp; + void *arg; + struct kstatfs *buf; +}; + +static void call_statfs(void *args) +{ + struct statfs_args *a = args; + *a->errp = vfs_statfs(a->arg, a->buf); +} + +#ifdef CONFIG_AUFS_DLGT +static void vfsub_statfs_dlgt(struct statfs_args *args, int dlgt) +{ + if (!dlgt) + call_statfs(args); + else { + int wkq_err; + wkq_err = au_wkq_wait(call_statfs, args, /*dlgt*/1); + if (unlikely(wkq_err)) + *args->errp = wkq_err; + } +} +#else +static void vfsub_statfs_dlgt(struct statfs_args *args, int dlgt) +{ + call_statfs(args); +} +#endif + +int vfsub_statfs(void *arg, struct kstatfs *buf, int dlgt) +{ + int err; + struct statfs_args args = { + .errp = &err, + .arg = arg, + .buf = buf + }; + + vfsub_statfs_dlgt(&args, dlgt); + + return err; +} diff --git a/fs/aufs/vfsub.h b/fs/aufs/vfsub.h new file mode 100644 index 0000000..d949833 --- /dev/null +++ b/fs/aufs/vfsub.h @@ -0,0 +1,472 @@ +/* + * Copyright (C) 2007-2008 Junjiro Okajima + * + * This program, aufs is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +/* + * sub-routines for VFS + */ + +#ifndef __AUFS_VFSUB_H__ +#define __AUFS_VFSUB_H__ + +#ifdef __KERNEL__ + +#include <linux/fs.h> +#include <linux/namei.h> +#include <linux/splice.h> +#include <linux/inotify.h> + +/* ---------------------------------------------------------------------- */ + +/* vfsub flags */ +#define Vfsub_DLGT 1 /* operation with delegation */ +#define Vfsub_FORCE_UNLINK (1 << 1) /* force unlinking */ +#define vfsub_ftest(flags, name) ((flags) & Vfsub_##name) +#define vfsub_fset(flags, name) { (flags) |= Vfsub_##name; } +#define vfsub_fclr(flags, name) { (flags) &= ~Vfsub_##name; } +#ifndef CONFIG_AUFS_DLGT +#undef Vfsub_DLGT +#define Vfsub_DLGT 0 +#endif + +struct au_hin_ignore; +struct vfsub_args { +#ifdef CONFIG_AUFS_HINOTIFY + /* inotify events to be ignored */ + int nignore; + struct au_hin_ignore *ignore; +#endif + + unsigned int flags; +}; + +struct au_hinode; +#ifdef CONFIG_AUFS_HINOTIFY +static inline +void do_vfsub_args_reinit(struct vfsub_args *vargs, struct au_hin_ignore *ign) +{ + vargs->nignore = 0; + vargs->ignore = ign; +} + +static inline void vfsub_args_reinit(struct vfsub_args *vargs) +{ + vargs->nignore = 0; +} + +__u32 vfsub_events_notify_change(struct iattr *ia); +void vfsub_ign_hinode(struct vfsub_args *vargs, __u32 events, + struct au_hinode *hinode); +void vfsub_ign_inode(struct vfsub_args *vargs, __u32 events, + struct inode *inode, struct inode *h_inode); + +void vfsub_ignore(struct vfsub_args *vargs); +void vfsub_unignore(struct vfsub_args *vargs); +#else +static inline +void do_vfsub_args_reinit(struct vfsub_args *vargs, struct au_hin_ignore *ign) +{ + /* empty */ +} + +static inline void vfsub_args_reinit(struct vfsub_args *vargs) +{ + /* empty */ +} + +static inline __u32 vfsub_events_notify_change(struct iattr *ia) +{ + return 0; +} + +static inline void vfsub_ign_hinode(struct vfsub_args *vargs, __u32 events, + struct au_hinode *hinode) +{ + /* empty */ +} + +static inline void vfsub_ign_inode(struct vfsub_args *vargs, __u32 events, + struct inode *inode, struct inode *h_inode) +{ + /* empty */ +} + +static inline void vfsub_ignore(struct vfsub_args *vargs) +{ + /* empty */ +} + +static inline void vfsub_unignore(struct vfsub_args *vargs) +{ + /* empty */ +} +#endif /* CONFIG_AUFS_HINOTIFY */ + +void vfsub_args_init(struct vfsub_args *vargs, struct au_hin_ignore *ign, + int dlgt, int force_unlink); + +/* ---------------------------------------------------------------------- */ + +/* inotify_inode_watched() is not exported */ +static inline int au_test_inotify(struct inode *inode) +{ +#ifdef CONFIG_INOTIFY + return !list_empty(&inode->inotify_watches); +#endif + return 0; +} + +/* ---------------------------------------------------------------------- */ + +/* lock subclass for hidden inode */ +/* default MAX_LOCKDEP_SUBCLASSES(8) is not enough */ +/* todo: reduce? */ +enum { + AuLsc_I_Begin = I_MUTEX_QUOTA, /* 4 */ + AuLsc_I_PARENT, /* hidden inode, parent first */ + AuLsc_I_CHILD, + AuLsc_I_PARENT2, /* copyup dirs */ + AuLsc_I_CHILD2, + AuLsc_I_End +}; + +#define IMustLock(i) MtxMustLock(&(i)->i_mutex) + +static inline +struct dentry *vfsub_lock_rename(struct dentry *d1, struct dentry *d2) +{ + struct dentry *d; + + lockdep_off(); + d = lock_rename(d1, d2); + lockdep_on(); + return d; +} + +static inline void vfsub_unlock_rename(struct dentry *d1, struct dentry *d2) +{ + lockdep_off(); + unlock_rename(d1, d2); + lockdep_on(); +} + +/* ---------------------------------------------------------------------- */ + +#ifdef CONFIG_AUFS_WORKAROUND_FUSE +/* br_fuse.c */ +int au_update_fuse_h_inode(struct vfsmount *h_mnt, struct dentry *h_dentry); +#else +static inline +int au_update_fuse_h_inode(struct vfsmount *h_mnt, struct dentry *h_dentry) +{ + return 0; +} +#endif + +#ifdef CONFIG_AUFS_BR_XFS +/* br_xfs.c */ +dev_t au_h_rdev(struct inode *h_inode, struct vfsmount *h_mnt, + struct dentry *h_dentry); +#else +static inline +dev_t au_h_rdev(struct inode *h_inode, struct vfsmount *h_mnt, + struct dentry *h_dentry) +{ + return h_inode->i_rdev; +} +#endif + +/* simple abstractions, for future use */ +static inline +int do_vfsub_permission(struct inode *inode, int mask, struct nameidata *nd) +{ + LKTRTrace("i%lu, mask 0x%x, nd %d\n", inode->i_ino, mask, !!nd); + IMustLock(inode); + return permission(inode, mask, nd); +} + +/* ---------------------------------------------------------------------- */ + +struct file *vfsub_filp_open(const char *path, int oflags, int mode); +int vfsub_path_lookup(const char *name, unsigned int flags, + struct nameidata *nd); +struct dentry *vfsub_lookup_one_len(const char *name, struct dentry *parent, + int len); + +struct dentry *vfsub__lookup_hash(struct qstr *name, struct dentry *parent, + struct nameidata *nd); + +/* ---------------------------------------------------------------------- */ + +int do_vfsub_create(struct inode *dir, struct dentry *dentry, int mode, + struct nameidata *nd); +int do_vfsub_symlink(struct inode *dir, struct dentry *dentry, + const char *symname, int mode); +int do_vfsub_mknod(struct inode *dir, struct dentry *dentry, int mode, + dev_t dev); +int do_vfsub_link(struct dentry *src_dentry, struct inode *dir, + struct dentry *dentry); +int do_vfsub_rename(struct inode *src_dir, struct dentry *src_dentry, + struct inode *dir, struct dentry *dentry); +int do_vfsub_mkdir(struct inode *dir, struct dentry *dentry, int mode); +int do_vfsub_rmdir(struct inode *dir, struct dentry *dentry); +int do_vfsub_unlink(struct inode *dir, struct dentry *dentry); + +/* ---------------------------------------------------------------------- */ + +ssize_t do_vfsub_read_u(struct file *file, char __user *ubuf, size_t count, + loff_t *ppos); +/* todo: kernel_read()? */ +ssize_t do_vfsub_read_k(struct file *file, void *kbuf, size_t count, + loff_t *ppos); +ssize_t do_vfsub_write_u(struct file *file, const char __user *ubuf, + size_t count, loff_t *ppos); +ssize_t do_vfsub_write_k(struct file *file, void *kbuf, size_t count, + loff_t *ppos); +int do_vfsub_readdir(struct file *file, filldir_t filldir, void *arg); + +/* ---------------------------------------------------------------------- */ + +long do_vfsub_splice_to(struct file *in, loff_t *ppos, + struct pipe_inode_info *pipe, size_t len, + unsigned int flags); +long do_vfsub_splice_from(struct pipe_inode_info *pipe, struct file *out, + loff_t *ppos, size_t len, unsigned int flags); + +/* ---------------------------------------------------------------------- */ + +static inline loff_t vfsub_llseek(struct file *file, loff_t offset, int origin) +{ + loff_t err; + + LKTRTrace("%.*s\n", AuDLNPair(file->f_dentry)); + + lockdep_off(); + err = vfs_llseek(file, offset, origin); + lockdep_on(); + return err; +} + +static inline int do_vfsub_getattr(struct vfsmount *mnt, struct dentry *dentry, + struct kstat *st) +{ + LKTRTrace("%.*s\n", AuDLNPair(dentry)); + return vfs_getattr(mnt, dentry, st); +} + +/* ---------------------------------------------------------------------- */ + +#if defined(CONFIG_AUFS_HINOTIFY) || defined(CONFIG_AUFS_DLGT) +/* hin_or_dlgt.c */ +int vfsub_permission(struct inode *inode, int mask, struct nameidata *nd, + int dlgt); + +int vfsub_create(struct inode *dir, struct dentry *dentry, int mode, + struct nameidata *nd, int dlgt); +int vfsub_symlink(struct inode *dir, struct dentry *dentry, const char *symname, + int mode, int dlgt); +int vfsub_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t dev, + int dlgt); +int vfsub_link(struct dentry *src_dentry, struct inode *dir, + struct dentry *dentry, int dlgt); +int vfsub_rename(struct inode *src_dir, struct dentry *src_dentry, + struct inode *dir, struct dentry *dentry, + struct vfsub_args *vargs); +int vfsub_mkdir(struct inode *dir, struct dentry *dentry, int mode, int dlgt); +int vfsub_rmdir(struct inode *dir, struct dentry *dentry, + struct vfsub_args *vargs); + +ssize_t vfsub_read_u(struct file *file, char __user *ubuf, size_t count, + loff_t *ppos, int dlgt); +ssize_t vfsub_read_k(struct file *file, void *kbuf, size_t count, loff_t *ppos, + int dlgt); +ssize_t vfsub_write_u(struct file *file, const char __user *ubuf, size_t count, + loff_t *ppos, struct vfsub_args *vargs); +ssize_t vfsub_write_k(struct file *file, void *kbuf, size_t count, loff_t *ppos, + struct vfsub_args *vargs); +int vfsub_readdir(struct file *file, filldir_t filldir, void *arg, int dlgt); +long vfsub_splice_to(struct file *in, loff_t *ppos, + struct pipe_inode_info *pipe, size_t len, + unsigned int flags, int dlgt); +long vfsub_splice_from(struct pipe_inode_info *pipe, struct file *out, + loff_t *ppos, size_t len, unsigned int flags, + struct vfsub_args *vargs); + +int vfsub_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *st, + int dlgt); +#else + +static inline +int vfsub_permission(struct inode *inode, int mask, struct nameidata *nd, + int dlgt) +{ + return do_vfsub_permission(inode, mask, nd); +} + +static inline +int vfsub_create(struct inode *dir, struct dentry *dentry, int mode, + struct nameidata *nd, int dlgt) +{ + return do_vfsub_create(dir, dentry, mode, nd); +} + +static inline +int vfsub_symlink(struct inode *dir, struct dentry *dentry, const char *symname, + int mode, int dlgt) +{ + return do_vfsub_symlink(dir, dentry, symname, mode); +} + +static inline +int vfsub_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t dev, + int dlgt) +{ + return do_vfsub_mknod(dir, dentry, mode, dev); +} + +static inline +int vfsub_link(struct dentry *src_dentry, struct inode *dir, + struct dentry *dentry, int dlgt) +{ + return do_vfsub_link(src_dentry, dir, dentry); +} + +static inline +int vfsub_rename(struct inode *src_dir, struct dentry *src_dentry, + struct inode *dir, struct dentry *dentry, + struct vfsub_args *vargs) +{ + int err; + + vfsub_ignore(vargs); + err = do_vfsub_rename(src_dir, src_dentry, dir, dentry); + if (unlikely(err)) + vfsub_unignore(vargs); + return err; +} + +static inline +int vfsub_mkdir(struct inode *dir, struct dentry *dentry, int mode, int dlgt) +{ + return do_vfsub_mkdir(dir, dentry, mode); +} + +static inline +int vfsub_rmdir(struct inode *dir, struct dentry *dentry, + struct vfsub_args *vargs) +{ + int err; + + vfsub_ignore(vargs); + err = do_vfsub_rmdir(dir, dentry); + if (unlikely(err)) + vfsub_unignore(vargs); + return err; +} + +static inline +ssize_t vfsub_read_u(struct file *file, char __user *ubuf, size_t count, + loff_t *ppos, int dlgt) +{ + return do_vfsub_read_u(file, ubuf, count, ppos); +} + +static inline +ssize_t vfsub_read_k(struct file *file, void *kbuf, size_t count, loff_t *ppos, + int dlgt) +{ + return do_vfsub_read_k(file, kbuf, count, ppos); +} + +static inline +ssize_t vfsub_write_u(struct file *file, const char __user *ubuf, size_t count, + loff_t *ppos, struct vfsub_args *vargs) +{ + int err; + + vfsub_ignore(vargs); + err = do_vfsub_write_u(file, ubuf, count, ppos); + if (unlikely(err < 0)) + vfsub_unignore(vargs); + return err; +} + +static inline +ssize_t vfsub_write_k(struct file *file, void *kbuf, size_t count, loff_t *ppos, + struct vfsub_args *vargs) +{ + int err; + + vfsub_ignore(vargs); + err = do_vfsub_write_k(file, kbuf, count, ppos); + if (unlikely(err < 0)) + vfsub_unignore(vargs); + return err; +} + +static inline +int vfsub_readdir(struct file *file, filldir_t filldir, void *arg, int dlgt) +{ + return do_vfsub_readdir(file, filldir, arg); +} + +static inline +long vfsub_splice_to(struct file *in, loff_t *ppos, + struct pipe_inode_info *pipe, size_t len, + unsigned int flags, int dlgt) +{ + return do_vfsub_splice_to(in, ppos, pipe, len, flags); +} + +static inline +long vfsub_splice_from(struct pipe_inode_info *pipe, struct file *out, + loff_t *ppos, size_t len, unsigned int flags, + struct vfsub_args *vargs) +{ + long err; + + vfsub_ignore(vargs); + err = do_vfsub_splice_from(pipe, out, ppos, len, flags); + if (unlikely(err < 0)) + vfsub_unignore(vargs); + return err; +} + +static inline +int vfsub_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *st, + int dlgt) +{ + return do_vfsub_getattr(mnt, dentry, st); +} +#endif /* CONFIG_AUFS_DLGT || CONFIG_AUFS_HINOTIFY */ + +/* ---------------------------------------------------------------------- */ + +int vfsub_sio_mkdir(struct inode *dir, struct dentry *dentry, int mode, + int dlgt); +int vfsub_sio_rmdir(struct inode *dir, struct dentry *dentry, int dlgt); + +/* ---------------------------------------------------------------------- */ + +int vfsub_notify_change(struct dentry *dentry, struct iattr *ia, + struct vfsub_args *vargs); +int vfsub_unlink(struct inode *dir, struct dentry *dentry, + struct vfsub_args *vargs); +int vfsub_statfs(void *arg, struct kstatfs *buf, int dlgt); + +#endif /* __KERNEL__ */ +#endif /* __AUFS_VFSUB_H__ */ -- 1.5.5.1.308.g1fbb5.dirty -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html