/* ARGSUSED */
static int
zfsctl_shares_lookup(vnode_t *dvp, char *nm, vnode_t **vpp, pathname_t *pnp,
int flags, vnode_t *rdir, cred_t *cr, caller_context_t *ct,
int *direntflags, pathname_t *realpnp)
{
zfsvfs_t *zfsvfs = dvp->v_vfsp->vfs_data;
znode_t *dzp;
int error;
ZFS_ENTER(zfsvfs);
if (gfs_lookup_dot(vpp, dvp, zfsvfs->z_ctldir, nm) == 0) {
ZFS_EXIT(zfsvfs);
return (0);
}
if (zfsvfs->z_shares_dir == 0) {
ZFS_EXIT(zfsvfs);
return (ENOTSUP);
}
if ((error = zfs_zget(zfsvfs, zfsvfs->z_shares_dir, &dzp)) == 0)
error = VOP_LOOKUP(ZTOV(dzp), nm, vpp, pnp,
flags, rdir, cr, ct, direntflags, realpnp);
VN_RELE(ZTOV(dzp));
ZFS_EXIT(zfsvfs);
return (error);
}
/* ARGSUSED */
static int
zfsctl_shares_readdir(vnode_t *vp, uio_t *uiop, cred_t *cr, int *eofp,
caller_context_t *ct, int flags)
{
zfsvfs_t *zfsvfs = vp->v_vfsp->vfs_data;
znode_t *dzp;
int error;
ZFS_ENTER(zfsvfs);
if (zfsvfs->z_shares_dir == 0) {
ZFS_EXIT(zfsvfs);
return (ENOTSUP);
}
if ((error = zfs_zget(zfsvfs, zfsvfs->z_shares_dir, &dzp)) == 0) {
error = VOP_READDIR(ZTOV(dzp), uiop, cr, eofp, ct, flags);
VN_RELE(ZTOV(dzp));
} else {
*eofp = 1;
error = ENOENT;
}
ZFS_EXIT(zfsvfs);
return (error);
}
/* ARGSUSED */
int
zfsctl_root_lookup(vnode_t *dvp, char *nm, vnode_t **vpp, pathname_t *pnp,
int flags, vnode_t *rdir, cred_t *cr, caller_context_t *ct,
int *direntflags, pathname_t *realpnp)
{
zfsvfs_t *zfsvfs = dvp->v_vfsp->vfs_data;
int err;
/*
* No extended attributes allowed under .zfs
*/
if (flags & LOOKUP_XATTR)
return (EINVAL);
ZFS_ENTER(zfsvfs);
if (strcmp(nm, "..") == 0) {
err = VFS_ROOT(dvp->v_vfsp, vpp);
} else {
err = gfs_vop_lookup(dvp, nm, vpp, pnp, flags, rdir,
cr, ct, direntflags, realpnp);
}
ZFS_EXIT(zfsvfs);
return (err);
}
/* ARGSUSED */
static int
zpl_shares_getattr(struct vfsmount *mnt, struct dentry *dentry,
struct kstat *stat)
{
struct inode *ip = dentry->d_inode;
zfs_sb_t *zsb = ITOZSB(ip);
znode_t *dzp;
int error;
ZFS_ENTER(zsb);
if (zsb->z_shares_dir == 0) {
error = simple_getattr(mnt, dentry, stat);
stat->nlink = stat->size = 2;
stat->atime = CURRENT_TIME;
ZFS_EXIT(zsb);
return (error);
}
error = -zfs_zget(zsb, zsb->z_shares_dir, &dzp);
if (error == 0) {
error = -zfs_getattr_fast(ZTOI(dzp), stat);
iput(ZTOI(dzp));
}
//VN_RELE(ZTOI(dzp));
ZFS_EXIT(zsb);
ASSERT3S(error, <=, 0);
return (error);
}
/*
* Get root directory contents.
*/
static int
zpl_root_iterate(struct file *filp, struct dir_context *ctx)
{
zfs_sb_t *zsb = ITOZSB(filp->f_path.dentry->d_inode);
int error = 0;
ZFS_ENTER(zsb);
if (!dir_emit_dots(filp, ctx))
goto out;
if (ctx->pos == 2) {
if (!dir_emit(ctx, ZFS_SNAPDIR_NAME, strlen(ZFS_SNAPDIR_NAME),
ZFSCTL_INO_SNAPDIR, DT_DIR))
goto out;
ctx->pos++;
}
if (ctx->pos == 3) {
if (!dir_emit(ctx, ZFS_SHAREDIR_NAME, strlen(ZFS_SHAREDIR_NAME),
ZFSCTL_INO_SHARES, DT_DIR))
goto out;
ctx->pos++;
}
out:
ZFS_EXIT(zsb);
return (error);
}
/*ARGSUSED*/
static int
zfsctl_common_fid(vnode_t *vp, fid_t *fidp, caller_context_t *ct)
{
zfsvfs_t *zfsvfs = vp->v_vfsp->vfs_data;
zfsctl_node_t *zcp = vp->v_data;
uint64_t object = zcp->zc_id;
zfid_short_t *zfid;
int i;
ZFS_ENTER(zfsvfs);
if (fidp->fid_len < SHORT_FID_LEN) {
fidp->fid_len = SHORT_FID_LEN;
ZFS_EXIT(zfsvfs);
return (ENOSPC);
}
zfid = (zfid_short_t *)fidp;
zfid->zf_len = SHORT_FID_LEN;
for (i = 0; i < sizeof (zfid->zf_object); i++)
zfid->zf_object[i] = (uint8_t)(object >> (8 * i));
/* .zfs znodes always have a generation number of 0 */
for (i = 0; i < sizeof (zfid->zf_gen); i++)
zfid->zf_gen[i] = 0;
ZFS_EXIT(zfsvfs);
return (0);
}
/*ARGSUSED*/
int
zfsctl_fid(struct inode *ip, fid_t *fidp)
{
znode_t *zp = ITOZ(ip);
zfs_sb_t *zsb = ITOZSB(ip);
uint64_t object = zp->z_id;
zfid_short_t *zfid;
int i;
ZFS_ENTER(zsb);
if (fidp->fid_len < SHORT_FID_LEN) {
fidp->fid_len = SHORT_FID_LEN;
ZFS_EXIT(zsb);
return (ENOSPC);
}
zfid = (zfid_short_t *)fidp;
zfid->zf_len = SHORT_FID_LEN;
for (i = 0; i < sizeof (zfid->zf_object); i++)
zfid->zf_object[i] = (uint8_t)(object >> (8 * i));
/* .zfs znodes always have a generation number of 0 */
for (i = 0; i < sizeof (zfid->zf_gen); i++)
zfid->zf_gen[i] = 0;
ZFS_EXIT(zsb);
return (0);
}
static int zfsfuse_unlink(fuse_req_t req, fuse_ino_t parent, const char *name)
{
if(strlen(name) >= MAXNAMELEN)
return ENAMETOOLONG;
vfs_t *vfs = (vfs_t *) fuse_req_userdata(req);
zfsvfs_t *zfsvfs = vfs->vfs_data;
ZFS_ENTER(zfsvfs);
znode_t *znode;
int error = zfs_zget(zfsvfs, parent, &znode, B_FALSE);
if(error) {
ZFS_EXIT(zfsvfs);
/* If the inode we are trying to get was recently deleted
dnode_hold_impl will return EEXIST instead of ENOENT */
return error == EEXIST ? ENOENT : error;
}
ASSERT(znode != NULL);
vnode_t *dvp = ZTOV(znode);
ASSERT(dvp != NULL);
cred_t cred;
zfsfuse_getcred(req, &cred);
error = VOP_REMOVE(dvp, (char *) name, &cred, NULL, 0);
VN_RELE(dvp);
ZFS_EXIT(zfsvfs);
return error;
}
static int zfsfuse_lookup(fuse_req_t req, fuse_ino_t parent, const char *name)
{
if(strlen(name) >= MAXNAMELEN)
return ENAMETOOLONG;
vfs_t *vfs = (vfs_t *) fuse_req_userdata(req);
zfsvfs_t *zfsvfs = vfs->vfs_data;
ZFS_ENTER(zfsvfs);
znode_t *znode;
int error = zfs_zget(zfsvfs, parent, &znode, B_TRUE);
if(error) {
ZFS_EXIT(zfsvfs);
/* If the inode we are trying to get was recently deleted
dnode_hold_impl will return EEXIST instead of ENOENT */
return error == EEXIST ? ENOENT : error;
}
ASSERT(znode != NULL);
vnode_t *dvp = ZTOV(znode);
ASSERT(dvp != NULL);
vnode_t *vp = NULL;
cred_t cred;
zfsfuse_getcred(req, &cred);
error = VOP_LOOKUP(dvp, (char *) name, &vp, NULL, 0, NULL, &cred, NULL, NULL, NULL);
if(error)
goto out;
struct fuse_entry_param e = { 0 };
e.attr_timeout = 0.0;
e.entry_timeout = 0.0;
if(vp == NULL)
goto out;
e.ino = VTOZ(vp)->z_id;
if(e.ino == 3)
e.ino = 1;
e.generation = VTOZ(vp)->z_phys->zp_gen;
error = zfsfuse_stat(vp, &e.attr, &cred);
out:
if(vp != NULL)
VN_RELE(vp);
VN_RELE(dvp);
ZFS_EXIT(zfsvfs);
if(!error)
fuse_reply_entry(req, &e);
return error;
}
static int zfsfuse_release(fuse_req_t req, fuse_ino_t ino, struct fuse_file_info *fi)
{
vfs_t *vfs = (vfs_t *) fuse_req_userdata(req);
zfsvfs_t *zfsvfs = vfs->vfs_data;
ZFS_ENTER(zfsvfs);
file_info_t *info = (file_info_t *)(uintptr_t) fi->fh;
ASSERT(info->vp != NULL);
ASSERT(VTOZ(info->vp) != NULL);
ASSERT(VTOZ(info->vp)->z_id == ino);
cred_t cred;
zfsfuse_getcred(req, &cred);
int error = VOP_CLOSE(info->vp, info->flags, 1, (offset_t) 0, &cred, NULL);
VERIFY(error == 0);
VN_RELE(info->vp);
kmem_cache_free(file_info_cache, info);
ZFS_EXIT(zfsvfs);
return error;
}
static int zfsfuse_getattr(fuse_req_t req, fuse_ino_t ino, struct fuse_file_info *fi)
{
vfs_t *vfs = (vfs_t *) fuse_req_userdata(req);
zfsvfs_t *zfsvfs = vfs->vfs_data;
ZFS_ENTER(zfsvfs);
znode_t *znode;
int error = zfs_zget(zfsvfs, ino, &znode, B_TRUE);
if(error) {
ZFS_EXIT(zfsvfs);
/* If the inode we are trying to get was recently deleted
dnode_hold_impl will return EEXIST instead of ENOENT */
return error == EEXIST ? ENOENT : error;
}
ASSERT(znode != NULL);
vnode_t *vp = ZTOV(znode);
ASSERT(vp != NULL);
cred_t cred;
zfsfuse_getcred(req, &cred);
struct stat stbuf;
error = zfsfuse_stat(vp, &stbuf, &cred);
VN_RELE(vp);
ZFS_EXIT(zfsvfs);
if(!error)
fuse_reply_attr(req, &stbuf, 0.0);
return error;
}
/* ARGSUSED */
int
zfsctl_root_lookup(struct inode *dip, char *name, struct inode **ipp,
int flags, cred_t *cr, int *direntflags, pathname_t *realpnp)
{
zfs_sb_t *zsb = ITOZSB(dip);
int error = 0;
ZFS_ENTER(zsb);
if (strcmp(name, "..") == 0) {
*ipp = dip->i_sb->s_root->d_inode;
} else if (strcmp(name, ZFS_SNAPDIR_NAME) == 0) {
*ipp = zfsctl_inode_lookup(zsb, ZFSCTL_INO_SNAPDIR,
&zpl_fops_snapdir, &zpl_ops_snapdir);
} else if (strcmp(name, ZFS_SHAREDIR_NAME) == 0) {
*ipp = zfsctl_inode_lookup(zsb, ZFSCTL_INO_SHARES,
&zpl_fops_shares, &zpl_ops_shares);
} else {
*ipp = NULL;
}
if (*ipp == NULL)
error = ENOENT;
ZFS_EXIT(zsb);
return (error);
}
/* ARGSUSED */
int
zfsctl_snapdir_lookup(struct inode *dip, char *name, struct inode **ipp,
int flags, cred_t *cr, int *direntflags, pathname_t *realpnp)
{
zfs_sb_t *zsb = ITOZSB(dip);
uint64_t id;
int error;
ZFS_ENTER(zsb);
error = dmu_snapshot_lookup(zsb->z_os, name, &id);
if (error) {
ZFS_EXIT(zsb);
return (error);
}
*ipp = zfsctl_inode_lookup(zsb, ZFSCTL_INO_SNAPDIRS - id,
&simple_dir_operations, &simple_dir_inode_operations);
if (*ipp) {
#ifdef HAVE_AUTOMOUNT
(*ipp)->i_flags |= S_AUTOMOUNT;
#endif /* HAVE_AUTOMOUNT */
} else {
error = ENOENT;
}
ZFS_EXIT(zsb);
return (error);
}
static int
zpl_shares_iterate(struct file *filp, struct dir_context *ctx)
{
fstrans_cookie_t cookie;
cred_t *cr = CRED();
zfs_sb_t *zsb = ITOZSB(filp->f_path.dentry->d_inode);
znode_t *dzp;
int error = 0;
ZFS_ENTER(zsb);
cookie = spl_fstrans_mark();
if (zsb->z_shares_dir == 0) {
dir_emit_dots(filp, ctx);
goto out;
}
error = -zfs_zget(zsb, zsb->z_shares_dir, &dzp);
if (error)
goto out;
crhold(cr);
error = -zfs_readdir(ZTOI(dzp), ctx, cr);
crfree(cr);
VN_RELE(ZTOV(dzp));
out:
spl_fstrans_unmark(cookie);
ZFS_EXIT(zsb);
ASSERT3S(error, <=, 0);
return (error);
}
/* ARGSUSED */
int
zfsctl_shares_lookup(struct inode *dip, char *name, struct inode **ipp,
int flags, cred_t *cr, int *direntflags, pathname_t *realpnp)
{
zfs_sb_t *zsb = ITOZSB(dip);
struct inode *ip;
znode_t *dzp;
int error;
ZFS_ENTER(zsb);
if (zsb->z_shares_dir == 0) {
ZFS_EXIT(zsb);
return (ENOTSUP);
}
error = zfs_zget(zsb, zsb->z_shares_dir, &dzp);
if (error) {
ZFS_EXIT(zsb);
return (error);
}
error = zfs_lookup(ZTOI(dzp), name, &ip, 0, cr, NULL, NULL);
iput(ZTOI(dzp));
ZFS_EXIT(zsb);
return (error);
}
static int
zfs_statfs(vfs_t *vfsp, struct statfs *statp)
{
zfsvfs_t *zfsvfs = vfsp->vfs_data;
uint64_t refdbytes, availbytes, usedobjs, availobjs;
statp->f_version = STATFS_VERSION;
ZFS_ENTER(zfsvfs);
dmu_objset_space(zfsvfs->z_os,
&refdbytes, &availbytes, &usedobjs, &availobjs);
/*
* The underlying storage pool actually uses multiple block sizes.
* We report the fragsize as the smallest block size we support,
* and we report our blocksize as the filesystem's maximum blocksize.
*/
statp->f_bsize = zfsvfs->z_vfs->vfs_bsize;
statp->f_iosize = zfsvfs->z_vfs->vfs_bsize;
/*
* The following report "total" blocks of various kinds in the
* file system, but reported in terms of f_frsize - the
* "fragment" size.
*/
statp->f_blocks = (refdbytes + availbytes) / statp->f_bsize;
statp->f_bfree = availbytes / statp->f_bsize;
statp->f_bavail = statp->f_bfree; /* no root reservation */
/*
* statvfs() should really be called statufs(), because it assumes
* static metadata. ZFS doesn't preallocate files, so the best
* we can do is report the max that could possibly fit in f_files,
* and that minus the number actually used in f_ffree.
* For f_ffree, report the smaller of the number of object available
* and the number of blocks (each object will take at least a block).
*/
statp->f_ffree = MIN(availobjs, statp->f_bfree);
statp->f_files = statp->f_ffree + usedobjs;
/*
* We're a zfs filesystem.
*/
(void) strlcpy(statp->f_fstypename, "zfs", sizeof(statp->f_fstypename));
strlcpy(statp->f_mntfromname, vfsp->mnt_stat.f_mntfromname,
sizeof(statp->f_mntfromname));
strlcpy(statp->f_mntonname, vfsp->mnt_stat.f_mntonname,
sizeof(statp->f_mntonname));
statp->f_namemax = ZFS_MAXNAMELEN;
ZFS_EXIT(zfsvfs);
return (0);
}
/*
* The ARC has requested that the filesystem drop entries from the dentry
* and inode caches. This can occur when the ARC needs to free meta data
* blocks but can't because they are all pinned by entries in these caches.
*/
int
zfs_sb_prune(struct super_block *sb, unsigned long nr_to_scan, int *objects)
{
zfs_sb_t *zsb = sb->s_fs_info;
int error = 0;
#if defined(HAVE_SHRINK) || defined(HAVE_SPLIT_SHRINKER_CALLBACK)
struct shrinker *shrinker = &sb->s_shrink;
struct shrink_control sc = {
.nr_to_scan = nr_to_scan,
.gfp_mask = GFP_KERNEL,
};
#endif
ZFS_ENTER(zsb);
#if defined(HAVE_SPLIT_SHRINKER_CALLBACK) && \
defined(SHRINK_CONTROL_HAS_NID) && \
defined(SHRINKER_NUMA_AWARE)
if (sb->s_shrink.flags & SHRINKER_NUMA_AWARE) {
*objects = 0;
for_each_online_node(sc.nid)
*objects += (*shrinker->scan_objects)(shrinker, &sc);
} else {
*objects = (*shrinker->scan_objects)(shrinker, &sc);
}
#elif defined(HAVE_SPLIT_SHRINKER_CALLBACK)
*objects = (*shrinker->scan_objects)(shrinker, &sc);
#elif defined(HAVE_SHRINK)
*objects = (*shrinker->shrink)(shrinker, &sc);
#elif defined(HAVE_D_PRUNE_ALIASES)
#define D_PRUNE_ALIASES_IS_DEFAULT
*objects = zfs_sb_prune_aliases(zsb, nr_to_scan);
#else
#error "No available dentry and inode cache pruning mechanism."
#endif
#if defined(HAVE_D_PRUNE_ALIASES) && !defined(D_PRUNE_ALIASES_IS_DEFAULT)
#undef D_PRUNE_ALIASES_IS_DEFAULT
/*
* Fall back to zfs_sb_prune_aliases if the kernel's per-superblock
* shrinker couldn't free anything, possibly due to the inodes being
* allocated in a different memcg.
*/
if (*objects == 0)
*objects = zfs_sb_prune_aliases(zsb, nr_to_scan);
#endif
ZFS_EXIT(zsb);
dprintf_ds(zsb->z_os->os_dsl_dataset,
"pruning, nr_to_scan=%lu objects=%d error=%d\n",
nr_to_scan, *objects, error);
return (error);
}
static int
zpl_writepages(struct address_space *mapping, struct writeback_control *wbc)
{
znode_t *zp = ITOZ(mapping->host);
zfs_sb_t *zsb = ITOZSB(mapping->host);
enum writeback_sync_modes sync_mode;
int result;
ZFS_ENTER(zsb);
if (zsb->z_os->os_sync == ZFS_SYNC_ALWAYS)
wbc->sync_mode = WB_SYNC_ALL;
ZFS_EXIT(zsb);
sync_mode = wbc->sync_mode;
/*
* We don't want to run write_cache_pages() in SYNC mode here, because
* that would make putpage() wait for a single page to be committed to
* disk every single time, resulting in atrocious performance. Instead
* we run it once in non-SYNC mode so that the ZIL gets all the data,
* and then we commit it all in one go.
*/
wbc->sync_mode = WB_SYNC_NONE;
result = write_cache_pages(mapping, wbc, zpl_putpage, mapping);
if (sync_mode != wbc->sync_mode) {
ZFS_ENTER(zsb);
ZFS_VERIFY_ZP(zp);
if (zsb->z_log != NULL)
zil_commit(zsb->z_log, zp->z_id);
ZFS_EXIT(zsb);
/*
* We need to call write_cache_pages() again (we can't just
* return after the commit) because the previous call in
* non-SYNC mode does not guarantee that we got all the dirty
* pages (see the implementation of write_cache_pages() for
* details). That being said, this is a no-op in most cases.
*/
wbc->sync_mode = sync_mode;
result = write_cache_pages(mapping, wbc, zpl_putpage, mapping);
}
return (result);
}
/* ARGSUSED */
static int
zfsctl_snapdir_remove(vnode_t *dvp, char *name, vnode_t *cwd, cred_t *cr,
caller_context_t *ct, int flags)
{
zfsctl_snapdir_t *sdp = dvp->v_data;
zfs_snapentry_t *sep;
zfs_snapentry_t search;
zfsvfs_t *zfsvfs;
char snapname[MAXNAMELEN];
char real[MAXNAMELEN];
int err;
zfsvfs = dvp->v_vfsp->vfs_data;
ZFS_ENTER(zfsvfs);
if ((flags & FIGNORECASE) || zfsvfs->z_case == ZFS_CASE_INSENSITIVE) {
err = dmu_snapshot_realname(zfsvfs->z_os, name, real,
MAXNAMELEN, NULL);
if (err == 0) {
name = real;
} else if (err != ENOTSUP) {
ZFS_EXIT(zfsvfs);
return (err);
}
}
ZFS_EXIT(zfsvfs);
err = zfsctl_snapshot_zname(dvp, name, MAXNAMELEN, snapname);
if (!err)
err = zfs_secpolicy_destroy_perms(snapname, cr);
if (err)
return (err);
mutex_enter(&sdp->sd_lock);
search.se_name = name;
sep = avl_find(&sdp->sd_snaps, &search, NULL);
if (sep) {
avl_remove(&sdp->sd_snaps, sep);
err = zfsctl_unmount_snap(sep, MS_FORCE, cr);
if (err)
avl_add(&sdp->sd_snaps, sep);
else
err = dmu_objset_destroy(snapname, B_FALSE);
} else {
err = ENOENT;
}
mutex_exit(&sdp->sd_lock);
return (err);
}
/*ARGSUSED*/
int
zfs_sync(struct super_block *sb, int wait, cred_t *cr)
{
zfs_sb_t *zsb = sb->s_fs_info;
/*
* Data integrity is job one. We don't want a compromised kernel
* writing to the storage pool, so we never sync during panic.
*/
if (unlikely(oops_in_progress))
return (0);
/*
* Semantically, the only requirement is that the sync be initiated.
* The DMU syncs out txgs frequently, so there's nothing to do.
*/
if (!wait)
return (0);
if (zsb != NULL) {
/*
* Sync a specific filesystem.
*/
dsl_pool_t *dp;
ZFS_ENTER(zsb);
dp = dmu_objset_pool(zsb->z_os);
/*
* If the system is shutting down, then skip any
* filesystems which may exist on a suspended pool.
*/
if (spa_suspended(dp->dp_spa)) {
ZFS_EXIT(zsb);
return (0);
}
if (zsb->z_log != NULL)
zil_commit(zsb->z_log, 0);
ZFS_EXIT(zsb);
} else {
/*
* Sync all ZFS filesystems. This is what happens when you
* run sync(1M). Unlike other filesystems, ZFS honors the
* request by waiting for all pools to commit all dirty data.
*/
spa_sync_allpools();
}
return (0);
}
static int
zfs_vfs_sync(struct mount *mp, __unused int waitfor, __unused vfs_context_t context)
{
zfsvfs_t *zfsvfs = vfs_fsprivate(mp);
ZFS_ENTER(zfsvfs);
/*
* Mac OS X needs a file system modify time
*
* We use the mtime of the "com.apple.system.mtime"
* extended attribute, which is associated with the
* file system root directory.
*
* Here we sync any mtime changes to this attribute.
*/
if (zfsvfs->z_mtime_vp != NULL) {
timestruc_t mtime;
znode_t *zp;
top:
zp = VTOZ(zfsvfs->z_mtime_vp);
ZFS_TIME_DECODE(&mtime, zp->z_phys->zp_mtime);
if (zfsvfs->z_last_mtime_synced < mtime.tv_sec) {
dmu_tx_t *tx;
int error;
tx = dmu_tx_create(zfsvfs->z_os);
dmu_tx_hold_bonus(tx, zp->z_id);
error = dmu_tx_assign(tx, zfsvfs->z_assign);
if (error) {
if (error == ERESTART && zfsvfs->z_assign == TXG_NOWAIT) {
dmu_tx_wait(tx);
dmu_tx_abort(tx);
goto top;
}
dmu_tx_abort(tx);
} else {
dmu_buf_will_dirty(zp->z_dbuf, tx);
dmu_tx_commit(tx);
zfsvfs->z_last_mtime_synced = mtime.tv_sec;
}
}
}
if (zfsvfs->z_log != NULL)
zil_commit(zfsvfs->z_log, UINT64_MAX, 0);
else
txg_wait_synced(dmu_objset_pool(zfsvfs->z_os), 0);
ZFS_EXIT(zfsvfs);
return (0);
}
static int zfsfuse_readlink(fuse_req_t req, fuse_ino_t ino)
{
vfs_t *vfs = (vfs_t *) fuse_req_userdata(req);
zfsvfs_t *zfsvfs = vfs->vfs_data;
ZFS_ENTER(zfsvfs);
znode_t *znode;
int error = zfs_zget(zfsvfs, ino, &znode, B_FALSE);
if(error) {
ZFS_EXIT(zfsvfs);
/* If the inode we are trying to get was recently deleted
dnode_hold_impl will return EEXIST instead of ENOENT */
return error == EEXIST ? ENOENT : error;
}
ASSERT(znode != NULL);
vnode_t *vp = ZTOV(znode);
ASSERT(vp != NULL);
char buffer[PATH_MAX + 1];
iovec_t iovec;
uio_t uio;
uio.uio_iov = &iovec;
uio.uio_iovcnt = 1;
uio.uio_segflg = UIO_SYSSPACE;
uio.uio_fmode = 0;
uio.uio_llimit = RLIM64_INFINITY;
iovec.iov_base = buffer;
iovec.iov_len = sizeof(buffer) - 1;
uio.uio_resid = iovec.iov_len;
uio.uio_loffset = 0;
cred_t cred;
zfsfuse_getcred(req, &cred);
error = VOP_READLINK(vp, &uio, &cred, NULL);
VN_RELE(vp);
ZFS_EXIT(zfsvfs);
if(!error) {
VERIFY(uio.uio_loffset < sizeof(buffer));
buffer[uio.uio_loffset] = '\0';
fuse_reply_readlink(req, buffer);
}
return error;
}
/*
* File handle to vnode pointer
*/
static int
zfs_vfs_fhtovp(struct mount *mp, int fhlen, unsigned char *fhp,
struct vnode **vpp, __unused vfs_context_t context)
{
zfsvfs_t *zfsvfs = vfs_fsprivate(mp);
zfs_zfid_t *zfid = (zfs_zfid_t *)fhp;
znode_t *zp;
uint64_t obj_num = 0;
uint64_t fid_gen = 0;
uint64_t zp_gen;
int i;
int error;
*vpp = NULL;
ZFS_ENTER(zfsvfs);
if (fhlen < sizeof (zfs_zfid_t)) {
error = EINVAL;
goto out;
}
/*
* Grab the object and gen numbers in an endian neutral manner
*/
for (i = 0; i < sizeof (zfid->zf_object); i++)
obj_num |= ((uint64_t)zfid->zf_object[i]) << (8 * i);
for (i = 0; i < sizeof (zfid->zf_gen); i++)
fid_gen |= ((uint64_t)zfid->zf_gen[i]) << (8 * i);
if ((error = zfs_zget(zfsvfs, obj_num, &zp))) {
goto out;
}
zp_gen = zp->z_phys->zp_gen;
if (zp_gen == 0)
zp_gen = 1;
if (zp->z_unlinked || zp_gen != fid_gen) {
vnode_put(ZTOV(zp));
error = EINVAL;
goto out;
}
*vpp = ZTOV(zp);
out:
ZFS_EXIT(zfsvfs);
return (error);
}
/* ARGSUSED */
static int
zfsctl_snapdir_getattr(vnode_t *vp, vattr_t *vap, int flags, cred_t *cr,
caller_context_t *ct)
{
zfsvfs_t *zfsvfs = vp->v_vfsp->vfs_data;
zfsctl_snapdir_t *sdp = vp->v_data;
ZFS_ENTER(zfsvfs);
zfsctl_common_getattr(vp, vap);
vap->va_nodeid = gfs_file_inode(vp);
vap->va_nlink = vap->va_size = avl_numnodes(&sdp->sd_snaps) + 2;
ZFS_EXIT(zfsvfs);
return (0);
}
/* ARGSUSED */
static int
zfsctl_root_getattr(vnode_t *vp, vattr_t *vap, int flags, cred_t *cr,
caller_context_t *ct)
{
zfsvfs_t *zfsvfs = vp->v_vfsp->vfs_data;
ZFS_ENTER(zfsvfs);
vap->va_nodeid = ZFSCTL_INO_ROOT;
vap->va_nlink = vap->va_size = NROOT_ENTRIES;
zfsctl_common_getattr(vp, vap);
ZFS_EXIT(zfsvfs);
return (0);
}
int
zfs_root(zfs_sb_t *zsb, struct inode **ipp)
{
znode_t *rootzp;
int error;
ZFS_ENTER(zsb);
error = zfs_zget(zsb, zsb->z_root, &rootzp);
if (error == 0)
*ipp = ZTOI(rootzp);
ZFS_EXIT(zsb);
return (error);
}
int
zfs_sb_prune(struct super_block *sb, unsigned long nr_to_scan, int *objects)
{
zfs_sb_t *zsb = sb->s_fs_info;
struct shrinker *shrinker = &sb->s_shrink;
struct shrink_control sc = {
.nr_to_scan = nr_to_scan,
.gfp_mask = GFP_KERNEL,
};
ZFS_ENTER(zsb);
*objects = (*shrinker->shrink)(shrinker, &sc);
ZFS_EXIT(zsb);
return (0);
}
static int
zfs_root(vfs_t *vfsp, vnode_t **vpp)
{
zfsvfs_t *zfsvfs = vfsp->vfs_data;
znode_t *rootzp;
int error;
ZFS_ENTER(zfsvfs);
error = zfs_zget(zfsvfs, zfsvfs->z_root, &rootzp);
if (error == 0)
*vpp = ZTOV(rootzp);
ZFS_EXIT(zfsvfs);
return (error);
}
/* ARGSUSED */
static int
zpl_snapdir_getattr(struct vfsmount *mnt, struct dentry *dentry,
struct kstat *stat)
{
zfs_sb_t *zsb = ITOZSB(dentry->d_inode);
int error;
ZFS_ENTER(zsb);
error = simple_getattr(mnt, dentry, stat);
stat->nlink = stat->size = 2;
stat->ctime = stat->mtime = dmu_objset_snap_cmtime(zsb->z_os);
stat->atime = CURRENT_TIME;
ZFS_EXIT(zsb);
return (error);
}
static int
zfs_vfs_root(struct mount *mp, struct vnode **vpp, __unused vfs_context_t context)
{
zfsvfs_t *zfsvfs = vfs_fsprivate(mp);
znode_t *rootzp;
int error;
ZFS_ENTER(zfsvfs);
error = zfs_zget(zfsvfs, zfsvfs->z_root, &rootzp);
if (error == 0)
*vpp = ZTOV(rootzp);
ZFS_EXIT(zfsvfs);
return (error);
}
