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[readdir] convert ceph
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
parent
23db862060
commit
77acfa29e1
@ -111,11 +111,10 @@ static unsigned fpos_off(loff_t p)
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* defined IFF we hold CEPH_CAP_FILE_SHARED (which will be revoked by
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* the MDS if/when the directory is modified).
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*/
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static int __dcache_readdir(struct file *filp,
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void *dirent, filldir_t filldir)
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static int __dcache_readdir(struct file *file, struct dir_context *ctx)
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{
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struct ceph_file_info *fi = filp->private_data;
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struct dentry *parent = filp->f_dentry;
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struct ceph_file_info *fi = file->private_data;
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struct dentry *parent = file->f_dentry;
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struct inode *dir = parent->d_inode;
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struct list_head *p;
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struct dentry *dentry, *last;
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@ -126,14 +125,14 @@ static int __dcache_readdir(struct file *filp,
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last = fi->dentry;
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fi->dentry = NULL;
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dout("__dcache_readdir %p at %llu (last %p)\n", dir, filp->f_pos,
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dout("__dcache_readdir %p at %llu (last %p)\n", dir, ctx->pos,
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last);
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spin_lock(&parent->d_lock);
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/* start at beginning? */
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if (filp->f_pos == 2 || last == NULL ||
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filp->f_pos < ceph_dentry(last)->offset) {
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if (ctx->pos == 2 || last == NULL ||
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ctx->pos < ceph_dentry(last)->offset) {
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if (list_empty(&parent->d_subdirs))
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goto out_unlock;
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p = parent->d_subdirs.prev;
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@ -157,11 +156,11 @@ more:
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if (!d_unhashed(dentry) && dentry->d_inode &&
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ceph_snap(dentry->d_inode) != CEPH_SNAPDIR &&
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ceph_ino(dentry->d_inode) != CEPH_INO_CEPH &&
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filp->f_pos <= di->offset)
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ctx->pos <= di->offset)
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break;
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dout(" skipping %p %.*s at %llu (%llu)%s%s\n", dentry,
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dentry->d_name.len, dentry->d_name.name, di->offset,
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filp->f_pos, d_unhashed(dentry) ? " unhashed" : "",
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ctx->pos, d_unhashed(dentry) ? " unhashed" : "",
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!dentry->d_inode ? " null" : "");
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spin_unlock(&dentry->d_lock);
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p = p->prev;
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@ -173,29 +172,27 @@ more:
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spin_unlock(&dentry->d_lock);
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spin_unlock(&parent->d_lock);
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dout(" %llu (%llu) dentry %p %.*s %p\n", di->offset, filp->f_pos,
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dout(" %llu (%llu) dentry %p %.*s %p\n", di->offset, ctx->pos,
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dentry, dentry->d_name.len, dentry->d_name.name, dentry->d_inode);
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filp->f_pos = di->offset;
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err = filldir(dirent, dentry->d_name.name,
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dentry->d_name.len, di->offset,
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ctx->pos = di->offset;
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if (!dir_emit(ctx, dentry->d_name.name,
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dentry->d_name.len,
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ceph_translate_ino(dentry->d_sb, dentry->d_inode->i_ino),
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dentry->d_inode->i_mode >> 12);
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if (last) {
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if (err < 0) {
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dentry->d_inode->i_mode >> 12)) {
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if (last) {
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/* remember our position */
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fi->dentry = last;
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fi->next_offset = di->offset;
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} else {
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dput(last);
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}
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dput(dentry);
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return 0;
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}
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if (last)
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dput(last);
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last = dentry;
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if (err < 0)
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goto out;
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filp->f_pos++;
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ctx->pos++;
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/* make sure a dentry wasn't dropped while we didn't have parent lock */
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if (!ceph_dir_is_complete(dir)) {
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@ -235,59 +232,59 @@ static int note_last_dentry(struct ceph_file_info *fi, const char *name,
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return 0;
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}
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static int ceph_readdir(struct file *filp, void *dirent, filldir_t filldir)
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static int ceph_readdir(struct file *file, struct dir_context *ctx)
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{
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struct ceph_file_info *fi = filp->private_data;
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struct inode *inode = file_inode(filp);
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struct ceph_file_info *fi = file->private_data;
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struct inode *inode = file_inode(file);
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struct ceph_inode_info *ci = ceph_inode(inode);
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struct ceph_fs_client *fsc = ceph_inode_to_client(inode);
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struct ceph_mds_client *mdsc = fsc->mdsc;
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unsigned frag = fpos_frag(filp->f_pos);
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int off = fpos_off(filp->f_pos);
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unsigned frag = fpos_frag(ctx->pos);
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int off = fpos_off(ctx->pos);
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int err;
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u32 ftype;
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struct ceph_mds_reply_info_parsed *rinfo;
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const int max_entries = fsc->mount_options->max_readdir;
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const int max_bytes = fsc->mount_options->max_readdir_bytes;
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dout("readdir %p filp %p frag %u off %u\n", inode, filp, frag, off);
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dout("readdir %p file %p frag %u off %u\n", inode, file, frag, off);
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if (fi->flags & CEPH_F_ATEND)
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return 0;
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/* always start with . and .. */
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if (filp->f_pos == 0) {
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if (ctx->pos == 0) {
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/* note dir version at start of readdir so we can tell
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* if any dentries get dropped */
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fi->dir_release_count = atomic_read(&ci->i_release_count);
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dout("readdir off 0 -> '.'\n");
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if (filldir(dirent, ".", 1, ceph_make_fpos(0, 0),
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if (!dir_emit(ctx, ".", 1,
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ceph_translate_ino(inode->i_sb, inode->i_ino),
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inode->i_mode >> 12) < 0)
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inode->i_mode >> 12))
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return 0;
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filp->f_pos = 1;
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ctx->pos = 1;
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off = 1;
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}
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if (filp->f_pos == 1) {
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ino_t ino = parent_ino(filp->f_dentry);
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if (ctx->pos == 1) {
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ino_t ino = parent_ino(file->f_dentry);
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dout("readdir off 1 -> '..'\n");
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if (filldir(dirent, "..", 2, ceph_make_fpos(0, 1),
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if (!dir_emit(ctx, "..", 2,
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ceph_translate_ino(inode->i_sb, ino),
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inode->i_mode >> 12) < 0)
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inode->i_mode >> 12))
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return 0;
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filp->f_pos = 2;
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ctx->pos = 2;
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off = 2;
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}
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/* can we use the dcache? */
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spin_lock(&ci->i_ceph_lock);
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if ((filp->f_pos == 2 || fi->dentry) &&
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if ((ctx->pos == 2 || fi->dentry) &&
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!ceph_test_mount_opt(fsc, NOASYNCREADDIR) &&
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ceph_snap(inode) != CEPH_SNAPDIR &&
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__ceph_dir_is_complete(ci) &&
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__ceph_caps_issued_mask(ci, CEPH_CAP_FILE_SHARED, 1)) {
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spin_unlock(&ci->i_ceph_lock);
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err = __dcache_readdir(filp, dirent, filldir);
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err = __dcache_readdir(file, ctx);
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if (err != -EAGAIN)
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return err;
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} else {
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@ -327,7 +324,7 @@ more:
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return PTR_ERR(req);
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req->r_inode = inode;
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ihold(inode);
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req->r_dentry = dget(filp->f_dentry);
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req->r_dentry = dget(file->f_dentry);
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/* hints to request -> mds selection code */
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req->r_direct_mode = USE_AUTH_MDS;
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req->r_direct_hash = ceph_frag_value(frag);
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@ -379,15 +376,16 @@ more:
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rinfo = &fi->last_readdir->r_reply_info;
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dout("readdir frag %x num %d off %d chunkoff %d\n", frag,
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rinfo->dir_nr, off, fi->offset);
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ctx->pos = ceph_make_fpos(frag, off);
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while (off >= fi->offset && off - fi->offset < rinfo->dir_nr) {
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u64 pos = ceph_make_fpos(frag, off);
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struct ceph_mds_reply_inode *in =
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rinfo->dir_in[off - fi->offset].in;
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struct ceph_vino vino;
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ino_t ino;
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dout("readdir off %d (%d/%d) -> %lld '%.*s' %p\n",
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off, off - fi->offset, rinfo->dir_nr, pos,
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off, off - fi->offset, rinfo->dir_nr, ctx->pos,
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rinfo->dir_dname_len[off - fi->offset],
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rinfo->dir_dname[off - fi->offset], in);
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BUG_ON(!in);
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@ -395,16 +393,15 @@ more:
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vino.ino = le64_to_cpu(in->ino);
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vino.snap = le64_to_cpu(in->snapid);
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ino = ceph_vino_to_ino(vino);
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if (filldir(dirent,
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if (!dir_emit(ctx,
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rinfo->dir_dname[off - fi->offset],
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rinfo->dir_dname_len[off - fi->offset],
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pos,
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ceph_translate_ino(inode->i_sb, ino), ftype) < 0) {
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ceph_translate_ino(inode->i_sb, ino), ftype)) {
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dout("filldir stopping us...\n");
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return 0;
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}
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off++;
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filp->f_pos = pos + 1;
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ctx->pos++;
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}
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if (fi->last_name) {
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@ -417,7 +414,7 @@ more:
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if (!ceph_frag_is_rightmost(frag)) {
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frag = ceph_frag_next(frag);
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off = 0;
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filp->f_pos = ceph_make_fpos(frag, off);
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ctx->pos = ceph_make_fpos(frag, off);
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dout("readdir next frag is %x\n", frag);
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goto more;
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}
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@ -432,11 +429,11 @@ more:
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if (atomic_read(&ci->i_release_count) == fi->dir_release_count) {
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dout(" marking %p complete\n", inode);
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__ceph_dir_set_complete(ci, fi->dir_release_count);
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ci->i_max_offset = filp->f_pos;
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ci->i_max_offset = ctx->pos;
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}
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spin_unlock(&ci->i_ceph_lock);
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dout("readdir %p filp %p done.\n", inode, filp);
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dout("readdir %p file %p done.\n", inode, file);
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return 0;
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}
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@ -1268,7 +1265,7 @@ unsigned ceph_dentry_hash(struct inode *dir, struct dentry *dn)
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const struct file_operations ceph_dir_fops = {
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.read = ceph_read_dir,
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.readdir = ceph_readdir,
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.iterate = ceph_readdir,
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.llseek = ceph_dir_llseek,
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.open = ceph_open,
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.release = ceph_release,
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