| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Jeff Layton | 3811 | 24.76% | 41 | 13.90% |
| Sage Weil | 2729 | 17.73% | 40 | 13.56% |
| Yan Zheng | 2699 | 17.54% | 58 | 19.66% |
| Luis Henriques | 1733 | 11.26% | 19 | 6.44% |
| Xiubo Li | 1124 | 7.30% | 26 | 8.81% |
| Li Wang | 775 | 5.04% | 1 | 0.34% |
| Ilya Dryomov | 545 | 3.54% | 11 | 3.73% |
| Jianpeng Ma | 449 | 2.92% | 6 | 2.03% |
| David Howells | 405 | 2.63% | 5 | 1.69% |
| Chengguang Xu | 216 | 1.40% | 6 | 2.03% |
| Al Viro | 148 | 0.96% | 20 | 6.78% |
| Yehuda Sadeh Weinraub | 120 | 0.78% | 7 | 2.37% |
| Zhu, Caifeng | 108 | 0.70% | 1 | 0.34% |
| Christian Brauner | 97 | 0.63% | 2 | 0.68% |
| Alexander Graf | 97 | 0.63% | 1 | 0.34% |
| Alex Elder | 54 | 0.35% | 8 | 2.71% |
| David Chinner | 49 | 0.32% | 1 | 0.34% |
| Christoph Hellwig | 36 | 0.23% | 4 | 1.36% |
| Amir Goldstein | 21 | 0.14% | 3 | 1.02% |
| Sam Lang | 18 | 0.12% | 1 | 0.34% |
| Jan Kara | 14 | 0.09% | 1 | 0.34% |
| Peng Tao | 14 | 0.09% | 1 | 0.34% |
| Miklos Szeredi | 13 | 0.08% | 1 | 0.34% |
| Greg Farnum | 12 | 0.08% | 1 | 0.34% |
| Kirill A. Shutemov | 10 | 0.06% | 1 | 0.34% |
| Milosz Tanski | 9 | 0.06% | 1 | 0.34% |
| Zach Brown | 9 | 0.06% | 1 | 0.34% |
| Deepa Dinamani | 8 | 0.05% | 2 | 0.68% |
| zhengbin | 6 | 0.04% | 1 | 0.34% |
| Hu Weiwen | 6 | 0.04% | 1 | 0.34% |
| Dan Carpenter | 6 | 0.04% | 2 | 0.68% |
| Libo Chen | 5 | 0.03% | 1 | 0.34% |
| Tejun Heo | 5 | 0.03% | 1 | 0.34% |
| Nikolay Borisov | 4 | 0.03% | 1 | 0.34% |
| Andrew Morton | 4 | 0.03% | 1 | 0.34% |
| Arnd Bergmann | 4 | 0.03% | 2 | 0.68% |
| Jie Liu | 4 | 0.03% | 1 | 0.34% |
| Jens Axboe | 3 | 0.02% | 2 | 0.68% |
| Josef Bacik | 3 | 0.02% | 1 | 0.34% |
| Neil Brown | 3 | 0.02% | 1 | 0.34% |
| Niels de Vos | 3 | 0.02% | 1 | 0.34% |
| Gustavo A. R. Silva | 2 | 0.01% | 1 | 0.34% |
| Linus Torvalds (pre-git) | 2 | 0.01% | 1 | 0.34% |
| Greg Kroah-Hartman | 1 | 0.01% | 1 | 0.34% |
| Zhi Zhang | 1 | 0.01% | 1 | 0.34% |
| Henry C Chang | 1 | 0.01% | 1 | 0.34% |
| Linus Torvalds | 1 | 0.01% | 1 | 0.34% |
| Geliang Tang | 1 | 0.01% | 1 | 0.34% |
| Matthew Wilcox | 1 | 0.01% | 1 | 0.34% |
| SF Markus Elfring | 1 | 0.01% | 1 | 0.34% |
| Total | 15390 | 295 |
// SPDX-License-Identifier: GPL-2.0 #include <linux/ceph/ceph_debug.h> #include <linux/ceph/striper.h> #include <linux/module.h> #include <linux/sched.h> #include <linux/slab.h> #include <linux/file.h> #include <linux/mount.h> #include <linux/namei.h> #include <linux/writeback.h> #include <linux/falloc.h> #include <linux/iversion.h> #include <linux/ktime.h> #include <linux/splice.h> #include "super.h" #include "mds_client.h" #include "cache.h" #include "io.h" #include "metric.h" static __le32 ceph_flags_sys2wire(struct ceph_mds_client *mdsc, u32 flags) { struct ceph_client *cl = mdsc->fsc->client; u32 wire_flags = 0; switch (flags & O_ACCMODE) { case O_RDONLY: wire_flags |= CEPH_O_RDONLY; break; case O_WRONLY: wire_flags |= CEPH_O_WRONLY; break; case O_RDWR: wire_flags |= CEPH_O_RDWR; break; } flags &= ~O_ACCMODE; #define ceph_sys2wire(a) if (flags & a) { wire_flags |= CEPH_##a; flags &= ~a; } ceph_sys2wire(O_CREAT); ceph_sys2wire(O_EXCL); ceph_sys2wire(O_TRUNC); ceph_sys2wire(O_DIRECTORY); ceph_sys2wire(O_NOFOLLOW); #undef ceph_sys2wire if (flags) doutc(cl, "unused open flags: %x\n", flags); return cpu_to_le32(wire_flags); } /* * Ceph file operations * * Implement basic open/close functionality, and implement * read/write. * * We implement three modes of file I/O: * - buffered uses the generic_file_aio_{read,write} helpers * * - synchronous is used when there is multi-client read/write * sharing, avoids the page cache, and synchronously waits for an * ack from the OSD. * * - direct io takes the variant of the sync path that references * user pages directly. * * fsync() flushes and waits on dirty pages, but just queues metadata * for writeback: since the MDS can recover size and mtime there is no * need to wait for MDS acknowledgement. */ /* * How many pages to get in one call to iov_iter_get_pages(). This * determines the size of the on-stack array used as a buffer. */ #define ITER_GET_BVECS_PAGES 64 static ssize_t __iter_get_bvecs(struct iov_iter *iter, size_t maxsize, struct bio_vec *bvecs) { size_t size = 0; int bvec_idx = 0; if (maxsize > iov_iter_count(iter)) maxsize = iov_iter_count(iter); while (size < maxsize) { struct page *pages[ITER_GET_BVECS_PAGES]; ssize_t bytes; size_t start; int idx = 0; bytes = iov_iter_get_pages2(iter, pages, maxsize - size, ITER_GET_BVECS_PAGES, &start); if (bytes < 0) return size ?: bytes; size += bytes; for ( ; bytes; idx++, bvec_idx++) { int len = min_t(int, bytes, PAGE_SIZE - start); bvec_set_page(&bvecs[bvec_idx], pages[idx], len, start); bytes -= len; start = 0; } } return size; } /* * iov_iter_get_pages() only considers one iov_iter segment, no matter * what maxsize or maxpages are given. For ITER_BVEC that is a single * page. * * Attempt to get up to @maxsize bytes worth of pages from @iter. * Return the number of bytes in the created bio_vec array, or an error. */ static ssize_t iter_get_bvecs_alloc(struct iov_iter *iter, size_t maxsize, struct bio_vec **bvecs, int *num_bvecs) { struct bio_vec *bv; size_t orig_count = iov_iter_count(iter); ssize_t bytes; int npages; iov_iter_truncate(iter, maxsize); npages = iov_iter_npages(iter, INT_MAX); iov_iter_reexpand(iter, orig_count); /* * __iter_get_bvecs() may populate only part of the array -- zero it * out. */ bv = kvmalloc_array(npages, sizeof(*bv), GFP_KERNEL | __GFP_ZERO); if (!bv) return -ENOMEM; bytes = __iter_get_bvecs(iter, maxsize, bv); if (bytes < 0) { /* * No pages were pinned -- just free the array. */ kvfree(bv); return bytes; } *bvecs = bv; *num_bvecs = npages; return bytes; } static void put_bvecs(struct bio_vec *bvecs, int num_bvecs, bool should_dirty) { int i; for (i = 0; i < num_bvecs; i++) { if (bvecs[i].bv_page) { if (should_dirty) set_page_dirty_lock(bvecs[i].bv_page); put_page(bvecs[i].bv_page); } } kvfree(bvecs); } /* * Prepare an open request. Preallocate ceph_cap to avoid an * inopportune ENOMEM later. */ static struct ceph_mds_request * prepare_open_request(struct super_block *sb, int flags, int create_mode) { struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(sb); struct ceph_mds_request *req; int want_auth = USE_ANY_MDS; int op = (flags & O_CREAT) ? CEPH_MDS_OP_CREATE : CEPH_MDS_OP_OPEN; if (flags & (O_WRONLY|O_RDWR|O_CREAT|O_TRUNC)) want_auth = USE_AUTH_MDS; req = ceph_mdsc_create_request(mdsc, op, want_auth); if (IS_ERR(req)) goto out; req->r_fmode = ceph_flags_to_mode(flags); req->r_args.open.flags = ceph_flags_sys2wire(mdsc, flags); req->r_args.open.mode = cpu_to_le32(create_mode); out: return req; } static int ceph_init_file_info(struct inode *inode, struct file *file, int fmode, bool isdir) { struct ceph_inode_info *ci = ceph_inode(inode); struct ceph_mount_options *opt = ceph_inode_to_fs_client(&ci->netfs.inode)->mount_options; struct ceph_client *cl = ceph_inode_to_client(inode); struct ceph_file_info *fi; int ret; doutc(cl, "%p %llx.%llx %p 0%o (%s)\n", inode, ceph_vinop(inode), file, inode->i_mode, isdir ? "dir" : "regular"); BUG_ON(inode->i_fop->release != ceph_release); if (isdir) { struct ceph_dir_file_info *dfi = kmem_cache_zalloc(ceph_dir_file_cachep, GFP_KERNEL); if (!dfi) return -ENOMEM; file->private_data = dfi; fi = &dfi->file_info; dfi->next_offset = 2; dfi->readdir_cache_idx = -1; } else { fi = kmem_cache_zalloc(ceph_file_cachep, GFP_KERNEL); if (!fi) return -ENOMEM; if (opt->flags & CEPH_MOUNT_OPT_NOPAGECACHE) fi->flags |= CEPH_F_SYNC; file->private_data = fi; } ceph_get_fmode(ci, fmode, 1); fi->fmode = fmode; spin_lock_init(&fi->rw_contexts_lock); INIT_LIST_HEAD(&fi->rw_contexts); fi->filp_gen = READ_ONCE(ceph_inode_to_fs_client(inode)->filp_gen); if ((file->f_mode & FMODE_WRITE) && ceph_has_inline_data(ci)) { ret = ceph_uninline_data(file); if (ret < 0) goto error; } return 0; error: ceph_fscache_unuse_cookie(inode, file->f_mode & FMODE_WRITE); ceph_put_fmode(ci, fi->fmode, 1); kmem_cache_free(ceph_file_cachep, fi); /* wake up anyone waiting for caps on this inode */ wake_up_all(&ci->i_cap_wq); return ret; } /* * initialize private struct file data. * if we fail, clean up by dropping fmode reference on the ceph_inode */ static int ceph_init_file(struct inode *inode, struct file *file, int fmode) { struct ceph_client *cl = ceph_inode_to_client(inode); int ret = 0; switch (inode->i_mode & S_IFMT) { case S_IFREG: ceph_fscache_use_cookie(inode, file->f_mode & FMODE_WRITE); fallthrough; case S_IFDIR: ret = ceph_init_file_info(inode, file, fmode, S_ISDIR(inode->i_mode)); break; case S_IFLNK: doutc(cl, "%p %llx.%llx %p 0%o (symlink)\n", inode, ceph_vinop(inode), file, inode->i_mode); break; default: doutc(cl, "%p %llx.%llx %p 0%o (special)\n", inode, ceph_vinop(inode), file, inode->i_mode); /* * we need to drop the open ref now, since we don't * have .release set to ceph_release. */ BUG_ON(inode->i_fop->release == ceph_release); /* call the proper open fop */ ret = inode->i_fop->open(inode, file); } return ret; } /* * try renew caps after session gets killed. */ int ceph_renew_caps(struct inode *inode, int fmode) { struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(inode->i_sb); struct ceph_client *cl = mdsc->fsc->client; struct ceph_inode_info *ci = ceph_inode(inode); struct ceph_mds_request *req; int err, flags, wanted; spin_lock(&ci->i_ceph_lock); __ceph_touch_fmode(ci, mdsc, fmode); wanted = __ceph_caps_file_wanted(ci); if (__ceph_is_any_real_caps(ci) && (!(wanted & CEPH_CAP_ANY_WR) || ci->i_auth_cap)) { int issued = __ceph_caps_issued(ci, NULL); spin_unlock(&ci->i_ceph_lock); doutc(cl, "%p %llx.%llx want %s issued %s updating mds_wanted\n", inode, ceph_vinop(inode), ceph_cap_string(wanted), ceph_cap_string(issued)); ceph_check_caps(ci, 0); return 0; } spin_unlock(&ci->i_ceph_lock); flags = 0; if ((wanted & CEPH_CAP_FILE_RD) && (wanted & CEPH_CAP_FILE_WR)) flags = O_RDWR; else if (wanted & CEPH_CAP_FILE_RD) flags = O_RDONLY; else if (wanted & CEPH_CAP_FILE_WR) flags = O_WRONLY; #ifdef O_LAZY if (wanted & CEPH_CAP_FILE_LAZYIO) flags |= O_LAZY; #endif req = prepare_open_request(inode->i_sb, flags, 0); if (IS_ERR(req)) { err = PTR_ERR(req); goto out; } req->r_inode = inode; ihold(inode); req->r_num_caps = 1; err = ceph_mdsc_do_request(mdsc, NULL, req); ceph_mdsc_put_request(req); out: doutc(cl, "%p %llx.%llx open result=%d\n", inode, ceph_vinop(inode), err); return err < 0 ? err : 0; } /* * If we already have the requisite capabilities, we can satisfy * the open request locally (no need to request new caps from the * MDS). We do, however, need to inform the MDS (asynchronously) * if our wanted caps set expands. */ int ceph_open(struct inode *inode, struct file *file) { struct ceph_inode_info *ci = ceph_inode(inode); struct ceph_fs_client *fsc = ceph_sb_to_fs_client(inode->i_sb); struct ceph_client *cl = fsc->client; struct ceph_mds_client *mdsc = fsc->mdsc; struct ceph_mds_request *req; struct ceph_file_info *fi = file->private_data; int err; int flags, fmode, wanted; if (fi) { doutc(cl, "file %p is already opened\n", file); return 0; } /* filter out O_CREAT|O_EXCL; vfs did that already. yuck. */ flags = file->f_flags & ~(O_CREAT|O_EXCL); if (S_ISDIR(inode->i_mode)) { flags = O_DIRECTORY; /* mds likes to know */ } else if (S_ISREG(inode->i_mode)) { err = fscrypt_file_open(inode, file); if (err) return err; } doutc(cl, "%p %llx.%llx file %p flags %d (%d)\n", inode, ceph_vinop(inode), file, flags, file->f_flags); fmode = ceph_flags_to_mode(flags); wanted = ceph_caps_for_mode(fmode); /* snapped files are read-only */ if (ceph_snap(inode) != CEPH_NOSNAP && (file->f_mode & FMODE_WRITE)) return -EROFS; /* trivially open snapdir */ if (ceph_snap(inode) == CEPH_SNAPDIR) { return ceph_init_file(inode, file, fmode); } /* * No need to block if we have caps on the auth MDS (for * write) or any MDS (for read). Update wanted set * asynchronously. */ spin_lock(&ci->i_ceph_lock); if (__ceph_is_any_real_caps(ci) && (((fmode & CEPH_FILE_MODE_WR) == 0) || ci->i_auth_cap)) { int mds_wanted = __ceph_caps_mds_wanted(ci, true); int issued = __ceph_caps_issued(ci, NULL); doutc(cl, "open %p fmode %d want %s issued %s using existing\n", inode, fmode, ceph_cap_string(wanted), ceph_cap_string(issued)); __ceph_touch_fmode(ci, mdsc, fmode); spin_unlock(&ci->i_ceph_lock); /* adjust wanted? */ if ((issued & wanted) != wanted && (mds_wanted & wanted) != wanted && ceph_snap(inode) != CEPH_SNAPDIR) ceph_check_caps(ci, 0); return ceph_init_file(inode, file, fmode); } else if (ceph_snap(inode) != CEPH_NOSNAP && (ci->i_snap_caps & wanted) == wanted) { __ceph_touch_fmode(ci, mdsc, fmode); spin_unlock(&ci->i_ceph_lock); return ceph_init_file(inode, file, fmode); } spin_unlock(&ci->i_ceph_lock); doutc(cl, "open fmode %d wants %s\n", fmode, ceph_cap_string(wanted)); req = prepare_open_request(inode->i_sb, flags, 0); if (IS_ERR(req)) { err = PTR_ERR(req); goto out; } req->r_inode = inode; ihold(inode); req->r_num_caps = 1; err = ceph_mdsc_do_request(mdsc, NULL, req); if (!err) err = ceph_init_file(inode, file, req->r_fmode); ceph_mdsc_put_request(req); doutc(cl, "open result=%d on %llx.%llx\n", err, ceph_vinop(inode)); out: return err; } /* Clone the layout from a synchronous create, if the dir now has Dc caps */ static void cache_file_layout(struct inode *dst, struct inode *src) { struct ceph_inode_info *cdst = ceph_inode(dst); struct ceph_inode_info *csrc = ceph_inode(src); spin_lock(&cdst->i_ceph_lock); if ((__ceph_caps_issued(cdst, NULL) & CEPH_CAP_DIR_CREATE) && !ceph_file_layout_is_valid(&cdst->i_cached_layout)) { memcpy(&cdst->i_cached_layout, &csrc->i_layout, sizeof(cdst->i_cached_layout)); rcu_assign_pointer(cdst->i_cached_layout.pool_ns, ceph_try_get_string(csrc->i_layout.pool_ns)); } spin_unlock(&cdst->i_ceph_lock); } /* * Try to set up an async create. We need caps, a file layout, and inode number, * and either a lease on the dentry or complete dir info. If any of those * criteria are not satisfied, then return false and the caller can go * synchronous. */ static int try_prep_async_create(struct inode *dir, struct dentry *dentry, struct ceph_file_layout *lo, u64 *pino) { struct ceph_inode_info *ci = ceph_inode(dir); struct ceph_dentry_info *di = ceph_dentry(dentry); int got = 0, want = CEPH_CAP_FILE_EXCL | CEPH_CAP_DIR_CREATE; u64 ino; spin_lock(&ci->i_ceph_lock); /* No auth cap means no chance for Dc caps */ if (!ci->i_auth_cap) goto no_async; /* Any delegated inos? */ if (xa_empty(&ci->i_auth_cap->session->s_delegated_inos)) goto no_async; if (!ceph_file_layout_is_valid(&ci->i_cached_layout)) goto no_async; if ((__ceph_caps_issued(ci, NULL) & want) != want) goto no_async; if (d_in_lookup(dentry)) { if (!__ceph_dir_is_complete(ci)) goto no_async; spin_lock(&dentry->d_lock); di->lease_shared_gen = atomic_read(&ci->i_shared_gen); spin_unlock(&dentry->d_lock); } else if (atomic_read(&ci->i_shared_gen) != READ_ONCE(di->lease_shared_gen)) { goto no_async; } ino = ceph_get_deleg_ino(ci->i_auth_cap->session); if (!ino) goto no_async; *pino = ino; ceph_take_cap_refs(ci, want, false); memcpy(lo, &ci->i_cached_layout, sizeof(*lo)); rcu_assign_pointer(lo->pool_ns, ceph_try_get_string(ci->i_cached_layout.pool_ns)); got = want; no_async: spin_unlock(&ci->i_ceph_lock); return got; } static void restore_deleg_ino(struct inode *dir, u64 ino) { struct ceph_client *cl = ceph_inode_to_client(dir); struct ceph_inode_info *ci = ceph_inode(dir); struct ceph_mds_session *s = NULL; spin_lock(&ci->i_ceph_lock); if (ci->i_auth_cap) s = ceph_get_mds_session(ci->i_auth_cap->session); spin_unlock(&ci->i_ceph_lock); if (s) { int err = ceph_restore_deleg_ino(s, ino); if (err) pr_warn_client(cl, "unable to restore delegated ino 0x%llx to session: %d\n", ino, err); ceph_put_mds_session(s); } } static void wake_async_create_waiters(struct inode *inode, struct ceph_mds_session *session) { struct ceph_inode_info *ci = ceph_inode(inode); bool check_cap = false; spin_lock(&ci->i_ceph_lock); if (ci->i_ceph_flags & CEPH_I_ASYNC_CREATE) { ci->i_ceph_flags &= ~CEPH_I_ASYNC_CREATE; wake_up_bit(&ci->i_ceph_flags, CEPH_ASYNC_CREATE_BIT); if (ci->i_ceph_flags & CEPH_I_ASYNC_CHECK_CAPS) { ci->i_ceph_flags &= ~CEPH_I_ASYNC_CHECK_CAPS; check_cap = true; } } ceph_kick_flushing_inode_caps(session, ci); spin_unlock(&ci->i_ceph_lock); if (check_cap) ceph_check_caps(ci, CHECK_CAPS_FLUSH); } static void ceph_async_create_cb(struct ceph_mds_client *mdsc, struct ceph_mds_request *req) { struct ceph_client *cl = mdsc->fsc->client; struct dentry *dentry = req->r_dentry; struct inode *dinode = d_inode(dentry); struct inode *tinode = req->r_target_inode; int result = req->r_err ? req->r_err : le32_to_cpu(req->r_reply_info.head->result); WARN_ON_ONCE(dinode && tinode && dinode != tinode); /* MDS changed -- caller must resubmit */ if (result == -EJUKEBOX) goto out; mapping_set_error(req->r_parent->i_mapping, result); if (result) { int pathlen = 0; u64 base = 0; char *path = ceph_mdsc_build_path(mdsc, req->r_dentry, &pathlen, &base, 0); pr_warn_client(cl, "async create failure path=(%llx)%s result=%d!\n", base, IS_ERR(path) ? "<<bad>>" : path, result); ceph_mdsc_free_path(path, pathlen); ceph_dir_clear_complete(req->r_parent); if (!d_unhashed(dentry)) d_drop(dentry); if (dinode) { mapping_set_error(dinode->i_mapping, result); ceph_inode_shutdown(dinode); wake_async_create_waiters(dinode, req->r_session); } } if (tinode) { u64 ino = ceph_vino(tinode).ino; if (req->r_deleg_ino != ino) pr_warn_client(cl, "inode number mismatch! err=%d deleg_ino=0x%llx target=0x%llx\n", req->r_err, req->r_deleg_ino, ino); mapping_set_error(tinode->i_mapping, result); wake_async_create_waiters(tinode, req->r_session); } else if (!result) { pr_warn_client(cl, "no req->r_target_inode for 0x%llx\n", req->r_deleg_ino); } out: ceph_mdsc_release_dir_caps(req); } static int ceph_finish_async_create(struct inode *dir, struct inode *inode, struct dentry *dentry, struct file *file, umode_t mode, struct ceph_mds_request *req, struct ceph_acl_sec_ctx *as_ctx, struct ceph_file_layout *lo) { int ret; char xattr_buf[4]; struct ceph_mds_reply_inode in = { }; struct ceph_mds_reply_info_in iinfo = { .in = &in }; struct ceph_inode_info *ci = ceph_inode(dir); struct ceph_dentry_info *di = ceph_dentry(dentry); struct timespec64 now; struct ceph_string *pool_ns; struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(dir->i_sb); struct ceph_client *cl = mdsc->fsc->client; struct ceph_vino vino = { .ino = req->r_deleg_ino, .snap = CEPH_NOSNAP }; ktime_get_real_ts64(&now); iinfo.inline_version = CEPH_INLINE_NONE; iinfo.change_attr = 1; ceph_encode_timespec64(&iinfo.btime, &now); if (req->r_pagelist) { iinfo.xattr_len = req->r_pagelist->length; iinfo.xattr_data = req->r_pagelist->mapped_tail; } else { /* fake it */ iinfo.xattr_len = ARRAY_SIZE(xattr_buf); iinfo.xattr_data = xattr_buf; memset(iinfo.xattr_data, 0, iinfo.xattr_len); } in.ino = cpu_to_le64(vino.ino); in.snapid = cpu_to_le64(CEPH_NOSNAP); in.version = cpu_to_le64(1); // ??? in.cap.caps = in.cap.wanted = cpu_to_le32(CEPH_CAP_ALL_FILE); in.cap.cap_id = cpu_to_le64(1); in.cap.realm = cpu_to_le64(ci->i_snap_realm->ino); in.cap.flags = CEPH_CAP_FLAG_AUTH; in.ctime = in.mtime = in.atime = iinfo.btime; in.truncate_seq = cpu_to_le32(1); in.truncate_size = cpu_to_le64(-1ULL); in.xattr_version = cpu_to_le64(1); in.uid = cpu_to_le32(from_kuid(&init_user_ns, mapped_fsuid(req->r_mnt_idmap, &init_user_ns))); if (dir->i_mode & S_ISGID) { in.gid = cpu_to_le32(from_kgid(&init_user_ns, dir->i_gid)); /* Directories always inherit the setgid bit. */ if (S_ISDIR(mode)) mode |= S_ISGID; } else { in.gid = cpu_to_le32(from_kgid(&init_user_ns, mapped_fsgid(req->r_mnt_idmap, &init_user_ns))); } in.mode = cpu_to_le32((u32)mode); in.nlink = cpu_to_le32(1); in.max_size = cpu_to_le64(lo->stripe_unit); ceph_file_layout_to_legacy(lo, &in.layout); /* lo is private, so pool_ns can't change */ pool_ns = rcu_dereference_raw(lo->pool_ns); if (pool_ns) { iinfo.pool_ns_len = pool_ns->len; iinfo.pool_ns_data = pool_ns->str; } down_read(&mdsc->snap_rwsem); ret = ceph_fill_inode(inode, NULL, &iinfo, NULL, req->r_session, req->r_fmode, NULL); up_read(&mdsc->snap_rwsem); if (ret) { doutc(cl, "failed to fill inode: %d\n", ret); ceph_dir_clear_complete(dir); if (!d_unhashed(dentry)) d_drop(dentry); discard_new_inode(inode); } else { struct dentry *dn; doutc(cl, "d_adding new inode 0x%llx to 0x%llx/%s\n", vino.ino, ceph_ino(dir), dentry->d_name.name); ceph_dir_clear_ordered(dir); ceph_init_inode_acls(inode, as_ctx); if (inode->i_state & I_NEW) { /* * If it's not I_NEW, then someone created this before * we got here. Assume the server is aware of it at * that point and don't worry about setting * CEPH_I_ASYNC_CREATE. */ ceph_inode(inode)->i_ceph_flags = CEPH_I_ASYNC_CREATE; unlock_new_inode(inode); } if (d_in_lookup(dentry) || d_really_is_negative(dentry)) { if (!d_unhashed(dentry)) d_drop(dentry); dn = d_splice_alias(inode, dentry); WARN_ON_ONCE(dn && dn != dentry); } file->f_mode |= FMODE_CREATED; ret = finish_open(file, dentry, ceph_open); } spin_lock(&dentry->d_lock); di->flags &= ~CEPH_DENTRY_ASYNC_CREATE; wake_up_bit(&di->flags, CEPH_DENTRY_ASYNC_CREATE_BIT); spin_unlock(&dentry->d_lock); return ret; } /* * Do a lookup + open with a single request. If we get a non-existent * file or symlink, return 1 so the VFS can retry. */ int ceph_atomic_open(struct inode *dir, struct dentry *dentry, struct file *file, unsigned flags, umode_t mode) { struct mnt_idmap *idmap = file_mnt_idmap(file); struct ceph_fs_client *fsc = ceph_sb_to_fs_client(dir->i_sb); struct ceph_client *cl = fsc->client; struct ceph_mds_client *mdsc = fsc->mdsc; struct ceph_mds_request *req; struct inode *new_inode = NULL; struct dentry *dn; struct ceph_acl_sec_ctx as_ctx = {}; bool try_async = ceph_test_mount_opt(fsc, ASYNC_DIROPS); int mask; int err; doutc(cl, "%p %llx.%llx dentry %p '%pd' %s flags %d mode 0%o\n", dir, ceph_vinop(dir), dentry, dentry, d_unhashed(dentry) ? "unhashed" : "hashed", flags, mode); if (dentry->d_name.len > NAME_MAX) return -ENAMETOOLONG; err = ceph_wait_on_conflict_unlink(dentry); if (err) return err; /* * Do not truncate the file, since atomic_open is called before the * permission check. The caller will do the truncation afterward. */ flags &= ~O_TRUNC; retry: if (flags & O_CREAT) { if (ceph_quota_is_max_files_exceeded(dir)) return -EDQUOT; new_inode = ceph_new_inode(dir, dentry, &mode, &as_ctx); if (IS_ERR(new_inode)) { err = PTR_ERR(new_inode); goto out_ctx; } /* Async create can't handle more than a page of xattrs */ if (as_ctx.pagelist && !list_is_singular(&as_ctx.pagelist->head)) try_async = false; } else if (!d_in_lookup(dentry)) { /* If it's not being looked up, it's negative */ return -ENOENT; } /* do the open */ req = prepare_open_request(dir->i_sb, flags, mode); if (IS_ERR(req)) { err = PTR_ERR(req); goto out_ctx; } req->r_dentry = dget(dentry); req->r_num_caps = 2; mask = CEPH_STAT_CAP_INODE | CEPH_CAP_AUTH_SHARED; if (ceph_security_xattr_wanted(dir)) mask |= CEPH_CAP_XATTR_SHARED; req->r_args.open.mask = cpu_to_le32(mask); req->r_parent = dir; if (req->r_op == CEPH_MDS_OP_CREATE) req->r_mnt_idmap = mnt_idmap_get(idmap); ihold(dir); if (IS_ENCRYPTED(dir)) { set_bit(CEPH_MDS_R_FSCRYPT_FILE, &req->r_req_flags); err = fscrypt_prepare_lookup_partial(dir, dentry); if (err < 0) goto out_req; } if (flags & O_CREAT) { struct ceph_file_layout lo; req->r_dentry_drop = CEPH_CAP_FILE_SHARED | CEPH_CAP_AUTH_EXCL | CEPH_CAP_XATTR_EXCL; req->r_dentry_unless = CEPH_CAP_FILE_EXCL; ceph_as_ctx_to_req(req, &as_ctx); if (try_async && (req->r_dir_caps = try_prep_async_create(dir, dentry, &lo, &req->r_deleg_ino))) { struct ceph_vino vino = { .ino = req->r_deleg_ino, .snap = CEPH_NOSNAP }; struct ceph_dentry_info *di = ceph_dentry(dentry); set_bit(CEPH_MDS_R_ASYNC, &req->r_req_flags); req->r_args.open.flags |= cpu_to_le32(CEPH_O_EXCL); req->r_callback = ceph_async_create_cb; /* Hash inode before RPC */ new_inode = ceph_get_inode(dir->i_sb, vino, new_inode); if (IS_ERR(new_inode)) { err = PTR_ERR(new_inode); new_inode = NULL; goto out_req; } WARN_ON_ONCE(!(new_inode->i_state & I_NEW)); spin_lock(&dentry->d_lock); di->flags |= CEPH_DENTRY_ASYNC_CREATE; spin_unlock(&dentry->d_lock); err = ceph_mdsc_submit_request(mdsc, dir, req); if (!err) { err = ceph_finish_async_create(dir, new_inode, dentry, file, mode, req, &as_ctx, &lo); new_inode = NULL; } else if (err == -EJUKEBOX) { restore_deleg_ino(dir, req->r_deleg_ino); ceph_mdsc_put_request(req); discard_new_inode(new_inode); ceph_release_acl_sec_ctx(&as_ctx); memset(&as_ctx, 0, sizeof(as_ctx)); new_inode = NULL; try_async = false; ceph_put_string(rcu_dereference_raw(lo.pool_ns)); goto retry; } ceph_put_string(rcu_dereference_raw(lo.pool_ns)); goto out_req; } } set_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags); req->r_new_inode = new_inode; new_inode = NULL; err = ceph_mdsc_do_request(mdsc, (flags & O_CREAT) ? dir : NULL, req); if (err == -ENOENT) { dentry = ceph_handle_snapdir(req, dentry); if (IS_ERR(dentry)) { err = PTR_ERR(dentry); goto out_req; } err = 0; } if (!err && (flags & O_CREAT) && !req->r_reply_info.head->is_dentry) err = ceph_handle_notrace_create(dir, dentry); if (d_in_lookup(dentry)) { dn = ceph_finish_lookup(req, dentry, err); if (IS_ERR(dn)) err = PTR_ERR(dn); } else { /* we were given a hashed negative dentry */ dn = NULL; } if (err) goto out_req; if (dn || d_really_is_negative(dentry) || d_is_symlink(dentry)) { /* make vfs retry on splice, ENOENT, or symlink */ doutc(cl, "finish_no_open on dn %p\n", dn); err = finish_no_open(file, dn); } else { if (IS_ENCRYPTED(dir) && !fscrypt_has_permitted_context(dir, d_inode(dentry))) { pr_warn_client(cl, "Inconsistent encryption context (parent %llx:%llx child %llx:%llx)\n", ceph_vinop(dir), ceph_vinop(d_inode(dentry))); goto out_req; } doutc(cl, "finish_open on dn %p\n", dn); if (req->r_op == CEPH_MDS_OP_CREATE && req->r_reply_info.has_create_ino) { struct inode *newino = d_inode(dentry); cache_file_layout(dir, newino); ceph_init_inode_acls(newino, &as_ctx); file->f_mode |= FMODE_CREATED; } err = finish_open(file, dentry, ceph_open); } out_req: ceph_mdsc_put_request(req); iput(new_inode); out_ctx: ceph_release_acl_sec_ctx(&as_ctx); doutc(cl, "result=%d\n", err); return err; } int ceph_release(struct inode *inode, struct file *file) { struct ceph_client *cl = ceph_inode_to_client(inode); struct ceph_inode_info *ci = ceph_inode(inode); if (S_ISDIR(inode->i_mode)) { struct ceph_dir_file_info *dfi = file->private_data; doutc(cl, "%p %llx.%llx dir file %p\n", inode, ceph_vinop(inode), file); WARN_ON(!list_empty(&dfi->file_info.rw_contexts)); ceph_put_fmode(ci, dfi->file_info.fmode, 1); if (dfi->last_readdir) ceph_mdsc_put_request(dfi->last_readdir); kfree(dfi->last_name); kfree(dfi->dir_info); kmem_cache_free(ceph_dir_file_cachep, dfi); } else { struct ceph_file_info *fi = file->private_data; doutc(cl, "%p %llx.%llx regular file %p\n", inode, ceph_vinop(inode), file); WARN_ON(!list_empty(&fi->rw_contexts)); ceph_fscache_unuse_cookie(inode, file->f_mode & FMODE_WRITE); ceph_put_fmode(ci, fi->fmode, 1); kmem_cache_free(ceph_file_cachep, fi); } /* wake up anyone waiting for caps on this inode */ wake_up_all(&ci->i_cap_wq); return 0; } enum { HAVE_RETRIED = 1, CHECK_EOF = 2, READ_INLINE = 3, }; /* * Completely synchronous read and write methods. Direct from __user * buffer to osd, or directly to user pages (if O_DIRECT). * * If the read spans object boundary, just do multiple reads. (That's not * atomic, but good enough for now.) * * If we get a short result from the OSD, check against i_size; we need to * only return a short read to the caller if we hit EOF. */ ssize_t __ceph_sync_read(struct inode *inode, loff_t *ki_pos, struct iov_iter *to, int *retry_op, u64 *last_objver) { struct ceph_inode_info *ci = ceph_inode(inode); struct ceph_fs_client *fsc = ceph_inode_to_fs_client(inode); struct ceph_client *cl = fsc->client; struct ceph_osd_client *osdc = &fsc->client->osdc; ssize_t ret; u64 off = *ki_pos; u64 len = iov_iter_count(to); u64 i_size = i_size_read(inode); bool sparse = IS_ENCRYPTED(inode) || ceph_test_mount_opt(fsc, SPARSEREAD); u64 objver = 0; doutc(cl, "on inode %p %llx.%llx %llx~%llx\n", inode, ceph_vinop(inode), *ki_pos, len); if (ceph_inode_is_shutdown(inode)) return -EIO; if (!len) return 0; /* * flush any page cache pages in this range. this * will make concurrent normal and sync io slow, * but it will at least behave sensibly when they are * in sequence. */ ret = filemap_write_and_wait_range(inode->i_mapping, off, off + len - 1); if (ret < 0) return ret; ret = 0; while ((len = iov_iter_count(to)) > 0) { struct ceph_osd_request *req; struct page **pages; int num_pages; size_t page_off; bool more; int idx; size_t left; struct ceph_osd_req_op *op; u64 read_off = off; u64 read_len = len; int extent_cnt; /* determine new offset/length if encrypted */ ceph_fscrypt_adjust_off_and_len(inode, &read_off, &read_len); doutc(cl, "orig %llu~%llu reading %llu~%llu", off, len, read_off, read_len); req = ceph_osdc_new_request(osdc, &ci->i_layout, ci->i_vino, read_off, &read_len, 0, 1, sparse ? CEPH_OSD_OP_SPARSE_READ : CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ, NULL, ci->i_truncate_seq, ci->i_truncate_size, false); if (IS_ERR(req)) { ret = PTR_ERR(req); break; } /* adjust len downward if the request truncated the len */ if (off + len > read_off + read_len) len = read_off + read_len - off; more = len < iov_iter_count(to); num_pages = calc_pages_for(read_off, read_len); page_off = offset_in_page(off); pages = ceph_alloc_page_vector(num_pages, GFP_KERNEL); if (IS_ERR(pages)) { ceph_osdc_put_request(req); ret = PTR_ERR(pages); break; } osd_req_op_extent_osd_data_pages(req, 0, pages, read_len, offset_in_page(read_off), false, false); op = &req->r_ops[0]; if (sparse) { extent_cnt = __ceph_sparse_read_ext_count(inode, read_len); ret = ceph_alloc_sparse_ext_map(op, extent_cnt); if (ret) { ceph_osdc_put_request(req); break; } } ceph_osdc_start_request(osdc, req); ret = ceph_osdc_wait_request(osdc, req); ceph_update_read_metrics(&fsc->mdsc->metric, req->r_start_latency, req->r_end_latency, read_len, ret); if (ret > 0) objver = req->r_version; i_size = i_size_read(inode); doutc(cl, "%llu~%llu got %zd i_size %llu%s\n", off, len, ret, i_size, (more ? " MORE" : "")); /* Fix it to go to end of extent map */ if (sparse && ret >= 0) ret = ceph_sparse_ext_map_end(op); else if (ret == -ENOENT) ret = 0; if (ret > 0 && IS_ENCRYPTED(inode)) { int fret; fret = ceph_fscrypt_decrypt_extents(inode, pages, read_off, op->extent.sparse_ext, op->extent.sparse_ext_cnt); if (fret < 0) { ret = fret; ceph_osdc_put_request(req); break; } /* account for any partial block at the beginning */ fret -= (off - read_off); /* * Short read after big offset adjustment? * Nothing is usable, just call it a zero * len read. */ fret = max(fret, 0); /* account for partial block at the end */ ret = min_t(ssize_t, fret, len); } ceph_osdc_put_request(req); /* Short read but not EOF? Zero out the remainder. */ if (ret >= 0 && ret < len && (off + ret < i_size)) { int zlen = min(len - ret, i_size - off - ret); int zoff = page_off + ret; doutc(cl, "zero gap %llu~%llu\n", off + ret, off + ret + zlen); ceph_zero_page_vector_range(zoff, zlen, pages); ret += zlen; } idx = 0; if (ret <= 0) left = 0; else if (off + ret > i_size) left = i_size - off; else left = ret; while (left > 0) { size_t plen, copied; plen = min_t(size_t, left, PAGE_SIZE - page_off); SetPageUptodate(pages[idx]); copied = copy_page_to_iter(pages[idx++], page_off, plen, to); off += copied; left -= copied; page_off = 0; if (copied < plen) { ret = -EFAULT; break; } } ceph_release_page_vector(pages, num_pages); if (ret < 0) { if (ret == -EBLOCKLISTED) fsc->blocklisted = true; break; } if (off >= i_size || !more) break; } if (ret > 0) { if (off >= i_size) { *retry_op = CHECK_EOF; ret = i_size - *ki_pos; *ki_pos = i_size; } else { ret = off - *ki_pos; *ki_pos = off; } if (last_objver) *last_objver = objver; } doutc(cl, "result %zd retry_op %d\n", ret, *retry_op); return ret; } static ssize_t ceph_sync_read(struct kiocb *iocb, struct iov_iter *to, int *retry_op) { struct file *file = iocb->ki_filp; struct inode *inode = file_inode(file); struct ceph_client *cl = ceph_inode_to_client(inode); doutc(cl, "on file %p %llx~%zx %s\n", file, iocb->ki_pos, iov_iter_count(to), (file->f_flags & O_DIRECT) ? "O_DIRECT" : ""); return __ceph_sync_read(inode, &iocb->ki_pos, to, retry_op, NULL); } struct ceph_aio_request { struct kiocb *iocb; size_t total_len; bool write; bool should_dirty; int error; struct list_head osd_reqs; unsigned num_reqs; atomic_t pending_reqs; struct timespec64 mtime; struct ceph_cap_flush *prealloc_cf; }; struct ceph_aio_work { struct work_struct work; struct ceph_osd_request *req; }; static void ceph_aio_retry_work(struct work_struct *work); static void ceph_aio_complete(struct inode *inode, struct ceph_aio_request *aio_req) { struct ceph_client *cl = ceph_inode_to_client(inode); struct ceph_inode_info *ci = ceph_inode(inode); int ret; if (!atomic_dec_and_test(&aio_req->pending_reqs)) return; if (aio_req->iocb->ki_flags & IOCB_DIRECT) inode_dio_end(inode); ret = aio_req->error; if (!ret) ret = aio_req->total_len; doutc(cl, "%p %llx.%llx rc %d\n", inode, ceph_vinop(inode), ret); if (ret >= 0 && aio_req->write) { int dirty; loff_t endoff = aio_req->iocb->ki_pos + aio_req->total_len; if (endoff > i_size_read(inode)) { if (ceph_inode_set_size(inode, endoff)) ceph_check_caps(ci, CHECK_CAPS_AUTHONLY); } spin_lock(&ci->i_ceph_lock); dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_FILE_WR, &aio_req->prealloc_cf); spin_unlock(&ci->i_ceph_lock); if (dirty) __mark_inode_dirty(inode, dirty); } ceph_put_cap_refs(ci, (aio_req->write ? CEPH_CAP_FILE_WR : CEPH_CAP_FILE_RD)); aio_req->iocb->ki_complete(aio_req->iocb, ret); ceph_free_cap_flush(aio_req->prealloc_cf); kfree(aio_req); } static void ceph_aio_complete_req(struct ceph_osd_request *req) { int rc = req->r_result; struct inode *inode = req->r_inode; struct ceph_aio_request *aio_req = req->r_priv; struct ceph_osd_data *osd_data = osd_req_op_extent_osd_data(req, 0); struct ceph_osd_req_op *op = &req->r_ops[0]; struct ceph_client_metric *metric = &ceph_sb_to_mdsc(inode->i_sb)->metric; unsigned int len = osd_data->bvec_pos.iter.bi_size; bool sparse = (op->op == CEPH_OSD_OP_SPARSE_READ); struct ceph_client *cl = ceph_inode_to_client(inode); BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_BVECS); BUG_ON(!osd_data->num_bvecs); doutc(cl, "req %p inode %p %llx.%llx, rc %d bytes %u\n", req, inode, ceph_vinop(inode), rc, len); if (rc == -EOLDSNAPC) { struct ceph_aio_work *aio_work; BUG_ON(!aio_req->write); aio_work = kmalloc(sizeof(*aio_work), GFP_NOFS); if (aio_work) { INIT_WORK(&aio_work->work, ceph_aio_retry_work); aio_work->req = req; queue_work(ceph_inode_to_fs_client(inode)->inode_wq, &aio_work->work); return; } rc = -ENOMEM; } else if (!aio_req->write) { if (sparse && rc >= 0) rc = ceph_sparse_ext_map_end(op); if (rc == -ENOENT) rc = 0; if (rc >= 0 && len > rc) { struct iov_iter i; int zlen = len - rc; /* * If read is satisfied by single OSD request, * it can pass EOF. Otherwise read is within * i_size. */ if (aio_req->num_reqs == 1) { loff_t i_size = i_size_read(inode); loff_t endoff = aio_req->iocb->ki_pos + rc; if (endoff < i_size) zlen = min_t(size_t, zlen, i_size - endoff); aio_req->total_len = rc + zlen; } iov_iter_bvec(&i, ITER_DEST, osd_data->bvec_pos.bvecs, osd_data->num_bvecs, len); iov_iter_advance(&i, rc); iov_iter_zero(zlen, &i); } } /* r_start_latency == 0 means the request was not submitted */ if (req->r_start_latency) { if (aio_req->write) ceph_update_write_metrics(metric, req->r_start_latency, req->r_end_latency, len, rc); else ceph_update_read_metrics(metric, req->r_start_latency, req->r_end_latency, len, rc); } put_bvecs(osd_data->bvec_pos.bvecs, osd_data->num_bvecs, aio_req->should_dirty); ceph_osdc_put_request(req); if (rc < 0) cmpxchg(&aio_req->error, 0, rc); ceph_aio_complete(inode, aio_req); return; } static void ceph_aio_retry_work(struct work_struct *work) { struct ceph_aio_work *aio_work = container_of(work, struct ceph_aio_work, work); struct ceph_osd_request *orig_req = aio_work->req; struct ceph_aio_request *aio_req = orig_req->r_priv; struct inode *inode = orig_req->r_inode; struct ceph_inode_info *ci = ceph_inode(inode); struct ceph_snap_context *snapc; struct ceph_osd_request *req; int ret; spin_lock(&ci->i_ceph_lock); if (__ceph_have_pending_cap_snap(ci)) { struct ceph_cap_snap *capsnap = list_last_entry(&ci->i_cap_snaps, struct ceph_cap_snap, ci_item); snapc = ceph_get_snap_context(capsnap->context); } else { BUG_ON(!ci->i_head_snapc); snapc = ceph_get_snap_context(ci->i_head_snapc); } spin_unlock(&ci->i_ceph_lock); req = ceph_osdc_alloc_request(orig_req->r_osdc, snapc, 1, false, GFP_NOFS); if (!req) { ret = -ENOMEM; req = orig_req; goto out; } req->r_flags = /* CEPH_OSD_FLAG_ORDERSNAP | */ CEPH_OSD_FLAG_WRITE; ceph_oloc_copy(&req->r_base_oloc, &orig_req->r_base_oloc); ceph_oid_copy(&req->r_base_oid, &orig_req->r_base_oid); req->r_ops[0] = orig_req->r_ops[0]; req->r_mtime = aio_req->mtime; req->r_data_offset = req->r_ops[0].extent.offset; ret = ceph_osdc_alloc_messages(req, GFP_NOFS); if (ret) { ceph_osdc_put_request(req); req = orig_req; goto out; } ceph_osdc_put_request(orig_req); req->r_callback = ceph_aio_complete_req; req->r_inode = inode; req->r_priv = aio_req; ceph_osdc_start_request(req->r_osdc, req); out: if (ret < 0) { req->r_result = ret; ceph_aio_complete_req(req); } ceph_put_snap_context(snapc); kfree(aio_work); } static ssize_t ceph_direct_read_write(struct kiocb *iocb, struct iov_iter *iter, struct ceph_snap_context *snapc, struct ceph_cap_flush **pcf) { struct file *file = iocb->ki_filp; struct inode *inode = file_inode(file); struct ceph_inode_info *ci = ceph_inode(inode); struct ceph_fs_client *fsc = ceph_inode_to_fs_client(inode); struct ceph_client *cl = fsc->client; struct ceph_client_metric *metric = &fsc->mdsc->metric; struct ceph_vino vino; struct ceph_osd_request *req; struct bio_vec *bvecs; struct ceph_aio_request *aio_req = NULL; int num_pages = 0; int flags; int ret = 0; struct timespec64 mtime = current_time(inode); size_t count = iov_iter_count(iter); loff_t pos = iocb->ki_pos; bool write = iov_iter_rw(iter) == WRITE; bool should_dirty = !write && user_backed_iter(iter); bool sparse = ceph_test_mount_opt(fsc, SPARSEREAD); if (write && ceph_snap(file_inode(file)) != CEPH_NOSNAP) return -EROFS; doutc(cl, "sync_direct_%s on file %p %lld~%u snapc %p seq %lld\n", (write ? "write" : "read"), file, pos, (unsigned)count, snapc, snapc ? snapc->seq : 0); if (write) { int ret2; ceph_fscache_invalidate(inode, true); ret2 = invalidate_inode_pages2_range(inode->i_mapping, pos >> PAGE_SHIFT, (pos + count - 1) >> PAGE_SHIFT); if (ret2 < 0) doutc(cl, "invalidate_inode_pages2_range returned %d\n", ret2); flags = /* CEPH_OSD_FLAG_ORDERSNAP | */ CEPH_OSD_FLAG_WRITE; } else { flags = CEPH_OSD_FLAG_READ; } while (iov_iter_count(iter) > 0) { u64 size = iov_iter_count(iter); ssize_t len; struct ceph_osd_req_op *op; int readop = sparse ? CEPH_OSD_OP_SPARSE_READ : CEPH_OSD_OP_READ; int extent_cnt; if (write) size = min_t(u64, size, fsc->mount_options->wsize); else size = min_t(u64, size, fsc->mount_options->rsize); vino = ceph_vino(inode); req = ceph_osdc_new_request(&fsc->client->osdc, &ci->i_layout, vino, pos, &size, 0, 1, write ? CEPH_OSD_OP_WRITE : readop, flags, snapc, ci->i_truncate_seq, ci->i_truncate_size, false); if (IS_ERR(req)) { ret = PTR_ERR(req); break; } len = iter_get_bvecs_alloc(iter, size, &bvecs, &num_pages); if (len < 0) { ceph_osdc_put_request(req); ret = len; break; } if (len != size) osd_req_op_extent_update(req, 0, len); /* * To simplify error handling, allow AIO when IO within i_size * or IO can be satisfied by single OSD request. */ if (pos == iocb->ki_pos && !is_sync_kiocb(iocb) && (len == count || pos + count <= i_size_read(inode))) { aio_req = kzalloc(sizeof(*aio_req), GFP_KERNEL); if (aio_req) { aio_req->iocb = iocb; aio_req->write = write; aio_req->should_dirty = should_dirty; INIT_LIST_HEAD(&aio_req->osd_reqs); if (write) { aio_req->mtime = mtime; swap(aio_req->prealloc_cf, *pcf); } } /* ignore error */ } if (write) { /* * throw out any page cache pages in this range. this * may block. */ truncate_inode_pages_range(inode->i_mapping, pos, PAGE_ALIGN(pos + len) - 1); req->r_mtime = mtime; } osd_req_op_extent_osd_data_bvecs(req, 0, bvecs, num_pages, len); op = &req->r_ops[0]; if (sparse) { extent_cnt = __ceph_sparse_read_ext_count(inode, size); ret = ceph_alloc_sparse_ext_map(op, extent_cnt); if (ret) { ceph_osdc_put_request(req); break; } } if (aio_req) { aio_req->total_len += len; aio_req->num_reqs++; atomic_inc(&aio_req->pending_reqs); req->r_callback = ceph_aio_complete_req; req->r_inode = inode; req->r_priv = aio_req; list_add_tail(&req->r_private_item, &aio_req->osd_reqs); pos += len; continue; } ceph_osdc_start_request(req->r_osdc, req); ret = ceph_osdc_wait_request(&fsc->client->osdc, req); if (write) ceph_update_write_metrics(metric, req->r_start_latency, req->r_end_latency, len, ret); else ceph_update_read_metrics(metric, req->r_start_latency, req->r_end_latency, len, ret); size = i_size_read(inode); if (!write) { if (sparse && ret >= 0) ret = ceph_sparse_ext_map_end(op); else if (ret == -ENOENT) ret = 0; if (ret >= 0 && ret < len && pos + ret < size) { struct iov_iter i; int zlen = min_t(size_t, len - ret, size - pos - ret); iov_iter_bvec(&i, ITER_DEST, bvecs, num_pages, len); iov_iter_advance(&i, ret); iov_iter_zero(zlen, &i); ret += zlen; } if (ret >= 0) len = ret; } put_bvecs(bvecs, num_pages, should_dirty); ceph_osdc_put_request(req); if (ret < 0) break; pos += len; if (!write && pos >= size) break; if (write && pos > size) { if (ceph_inode_set_size(inode, pos)) ceph_check_caps(ceph_inode(inode), CHECK_CAPS_AUTHONLY); } } if (aio_req) { LIST_HEAD(osd_reqs); if (aio_req->num_reqs == 0) { kfree(aio_req); return ret; } ceph_get_cap_refs(ci, write ? CEPH_CAP_FILE_WR : CEPH_CAP_FILE_RD); list_splice(&aio_req->osd_reqs, &osd_reqs); inode_dio_begin(inode); while (!list_empty(&osd_reqs)) { req = list_first_entry(&osd_reqs, struct ceph_osd_request, r_private_item); list_del_init(&req->r_private_item); if (ret >= 0) ceph_osdc_start_request(req->r_osdc, req); if (ret < 0) { req->r_result = ret; ceph_aio_complete_req(req); } } return -EIOCBQUEUED; } if (ret != -EOLDSNAPC && pos > iocb->ki_pos) { ret = pos - iocb->ki_pos; iocb->ki_pos = pos; } return ret; } /* * Synchronous write, straight from __user pointer or user pages. * * If write spans object boundary, just do multiple writes. (For a * correct atomic write, we should e.g. take write locks on all * objects, rollback on failure, etc.) */ static ssize_t ceph_sync_write(struct kiocb *iocb, struct iov_iter *from, loff_t pos, struct ceph_snap_context *snapc) { struct file *file = iocb->ki_filp; struct inode *inode = file_inode(file); struct ceph_inode_info *ci = ceph_inode(inode); struct ceph_fs_client *fsc = ceph_inode_to_fs_client(inode); struct ceph_client *cl = fsc->client; struct ceph_osd_client *osdc = &fsc->client->osdc; struct ceph_osd_request *req; struct page **pages; u64 len; int num_pages; int written = 0; int ret; bool check_caps = false; struct timespec64 mtime = current_time(inode); size_t count = iov_iter_count(from); if (ceph_snap(file_inode(file)) != CEPH_NOSNAP) return -EROFS; doutc(cl, "on file %p %lld~%u snapc %p seq %lld\n", file, pos, (unsigned)count, snapc, snapc->seq); ret = filemap_write_and_wait_range(inode->i_mapping, pos, pos + count - 1); if (ret < 0) return ret; ceph_fscache_invalidate(inode, false); while ((len = iov_iter_count(from)) > 0) { size_t left; int n; u64 write_pos = pos; u64 write_len = len; u64 objnum, objoff; u32 xlen; u64 assert_ver = 0; bool rmw; bool first, last; struct iov_iter saved_iter = *from; size_t off; ceph_fscrypt_adjust_off_and_len(inode, &write_pos, &write_len); /* clamp the length to the end of first object */ ceph_calc_file_object_mapping(&ci->i_layout, write_pos, write_len, &objnum, &objoff, &xlen); write_len = xlen; /* adjust len downward if it goes beyond current object */ if (pos + len > write_pos + write_len) len = write_pos + write_len - pos; /* * If we had to adjust the length or position to align with a * crypto block, then we must do a read/modify/write cycle. We * use a version assertion to redrive the thing if something * changes in between. */ first = pos != write_pos; last = (pos + len) != (write_pos + write_len); rmw = first || last; doutc(cl, "ino %llx %lld~%llu adjusted %lld~%llu -- %srmw\n", ci->i_vino.ino, pos, len, write_pos, write_len, rmw ? "" : "no "); /* * The data is emplaced into the page as it would be if it were * in an array of pagecache pages. */ num_pages = calc_pages_for(write_pos, write_len); pages = ceph_alloc_page_vector(num_pages, GFP_KERNEL); if (IS_ERR(pages)) { ret = PTR_ERR(pages); break; } /* Do we need to preload the pages? */ if (rmw) { u64 first_pos = write_pos; u64 last_pos = (write_pos + write_len) - CEPH_FSCRYPT_BLOCK_SIZE; u64 read_len = CEPH_FSCRYPT_BLOCK_SIZE; struct ceph_osd_req_op *op; /* We should only need to do this for encrypted inodes */ WARN_ON_ONCE(!IS_ENCRYPTED(inode)); /* No need to do two reads if first and last blocks are same */ if (first && last_pos == first_pos) last = false; /* * Allocate a read request for one or two extents, * depending on how the request was aligned. */ req = ceph_osdc_new_request(osdc, &ci->i_layout, ci->i_vino, first ? first_pos : last_pos, &read_len, 0, (first && last) ? 2 : 1, CEPH_OSD_OP_SPARSE_READ, CEPH_OSD_FLAG_READ, NULL, ci->i_truncate_seq, ci->i_truncate_size, false); if (IS_ERR(req)) { ceph_release_page_vector(pages, num_pages); ret = PTR_ERR(req); break; } /* Something is misaligned! */ if (read_len != CEPH_FSCRYPT_BLOCK_SIZE) { ceph_osdc_put_request(req); ceph_release_page_vector(pages, num_pages); ret = -EIO; break; } /* Add extent for first block? */ op = &req->r_ops[0]; if (first) { osd_req_op_extent_osd_data_pages(req, 0, pages, CEPH_FSCRYPT_BLOCK_SIZE, offset_in_page(first_pos), false, false); /* We only expect a single extent here */ ret = __ceph_alloc_sparse_ext_map(op, 1); if (ret) { ceph_osdc_put_request(req); ceph_release_page_vector(pages, num_pages); break; } } /* Add extent for last block */ if (last) { /* Init the other extent if first extent has been used */ if (first) { op = &req->r_ops[1]; osd_req_op_extent_init(req, 1, CEPH_OSD_OP_SPARSE_READ, last_pos, CEPH_FSCRYPT_BLOCK_SIZE, ci->i_truncate_size, ci->i_truncate_seq); } ret = __ceph_alloc_sparse_ext_map(op, 1); if (ret) { ceph_osdc_put_request(req); ceph_release_page_vector(pages, num_pages); break; } osd_req_op_extent_osd_data_pages(req, first ? 1 : 0, &pages[num_pages - 1], CEPH_FSCRYPT_BLOCK_SIZE, offset_in_page(last_pos), false, false); } ceph_osdc_start_request(osdc, req); ret = ceph_osdc_wait_request(osdc, req); /* FIXME: length field is wrong if there are 2 extents */ ceph_update_read_metrics(&fsc->mdsc->metric, req->r_start_latency, req->r_end_latency, read_len, ret); /* Ok if object is not already present */ if (ret == -ENOENT) { /* * If there is no object, then we can't assert * on its version. Set it to 0, and we'll use an * exclusive create instead. */ ceph_osdc_put_request(req); ret = 0; /* * zero out the soon-to-be uncopied parts of the * first and last pages. */ if (first) zero_user_segment(pages[0], 0, offset_in_page(first_pos)); if (last) zero_user_segment(pages[num_pages - 1], offset_in_page(last_pos), PAGE_SIZE); } else { if (ret < 0) { ceph_osdc_put_request(req); ceph_release_page_vector(pages, num_pages); break; } op = &req->r_ops[0]; if (op->extent.sparse_ext_cnt == 0) { if (first) zero_user_segment(pages[0], 0, offset_in_page(first_pos)); else zero_user_segment(pages[num_pages - 1], offset_in_page(last_pos), PAGE_SIZE); } else if (op->extent.sparse_ext_cnt != 1 || ceph_sparse_ext_map_end(op) != CEPH_FSCRYPT_BLOCK_SIZE) { ret = -EIO; ceph_osdc_put_request(req); ceph_release_page_vector(pages, num_pages); break; } if (first && last) { op = &req->r_ops[1]; if (op->extent.sparse_ext_cnt == 0) { zero_user_segment(pages[num_pages - 1], offset_in_page(last_pos), PAGE_SIZE); } else if (op->extent.sparse_ext_cnt != 1 || ceph_sparse_ext_map_end(op) != CEPH_FSCRYPT_BLOCK_SIZE) { ret = -EIO; ceph_osdc_put_request(req); ceph_release_page_vector(pages, num_pages); break; } } /* Grab assert version. It must be non-zero. */ assert_ver = req->r_version; WARN_ON_ONCE(ret > 0 && assert_ver == 0); ceph_osdc_put_request(req); if (first) { ret = ceph_fscrypt_decrypt_block_inplace(inode, pages[0], CEPH_FSCRYPT_BLOCK_SIZE, offset_in_page(first_pos), first_pos >> CEPH_FSCRYPT_BLOCK_SHIFT); if (ret < 0) { ceph_release_page_vector(pages, num_pages); break; } } if (last) { ret = ceph_fscrypt_decrypt_block_inplace(inode, pages[num_pages - 1], CEPH_FSCRYPT_BLOCK_SIZE, offset_in_page(last_pos), last_pos >> CEPH_FSCRYPT_BLOCK_SHIFT); if (ret < 0) { ceph_release_page_vector(pages, num_pages); break; } } } } left = len; off = offset_in_page(pos); for (n = 0; n < num_pages; n++) { size_t plen = min_t(size_t, left, PAGE_SIZE - off); /* copy the data */ ret = copy_page_from_iter(pages[n], off, plen, from); if (ret != plen) { ret = -EFAULT; break; } off = 0; left -= ret; } if (ret < 0) { doutc(cl, "write failed with %d\n", ret); ceph_release_page_vector(pages, num_pages); break; } if (IS_ENCRYPTED(inode)) { ret = ceph_fscrypt_encrypt_pages(inode, pages, write_pos, write_len, GFP_KERNEL); if (ret < 0) { doutc(cl, "encryption failed with %d\n", ret); ceph_release_page_vector(pages, num_pages); break; } } req = ceph_osdc_new_request(osdc, &ci->i_layout, ci->i_vino, write_pos, &write_len, rmw ? 1 : 0, rmw ? 2 : 1, CEPH_OSD_OP_WRITE, CEPH_OSD_FLAG_WRITE, snapc, ci->i_truncate_seq, ci->i_truncate_size, false); if (IS_ERR(req)) { ret = PTR_ERR(req); ceph_release_page_vector(pages, num_pages); break; } doutc(cl, "write op %lld~%llu\n", write_pos, write_len); osd_req_op_extent_osd_data_pages(req, rmw ? 1 : 0, pages, write_len, offset_in_page(write_pos), false, true); req->r_inode = inode; req->r_mtime = mtime; /* Set up the assertion */ if (rmw) { /* * Set up the assertion. If we don't have a version * number, then the object doesn't exist yet. Use an * exclusive create instead of a version assertion in * that case. */ if (assert_ver) { osd_req_op_init(req, 0, CEPH_OSD_OP_ASSERT_VER, 0); req->r_ops[0].assert_ver.ver = assert_ver; } else { osd_req_op_init(req, 0, CEPH_OSD_OP_CREATE, CEPH_OSD_OP_FLAG_EXCL); } } ceph_osdc_start_request(osdc, req); ret = ceph_osdc_wait_request(osdc, req); ceph_update_write_metrics(&fsc->mdsc->metric, req->r_start_latency, req->r_end_latency, len, ret); ceph_osdc_put_request(req); if (ret != 0) { doutc(cl, "osd write returned %d\n", ret); /* Version changed! Must re-do the rmw cycle */ if ((assert_ver && (ret == -ERANGE || ret == -EOVERFLOW)) || (!assert_ver && ret == -EEXIST)) { /* We should only ever see this on a rmw */ WARN_ON_ONCE(!rmw); /* The version should never go backward */ WARN_ON_ONCE(ret == -EOVERFLOW); *from = saved_iter; /* FIXME: limit number of times we loop? */ continue; } ceph_set_error_write(ci); break; } ceph_clear_error_write(ci); /* * We successfully wrote to a range of the file. Declare * that region of the pagecache invalid. */ ret = invalidate_inode_pages2_range( inode->i_mapping, pos >> PAGE_SHIFT, (pos + len - 1) >> PAGE_SHIFT); if (ret < 0) { doutc(cl, "invalidate_inode_pages2_range returned %d\n", ret); ret = 0; } pos += len; written += len; doutc(cl, "written %d\n", written); if (pos > i_size_read(inode)) { check_caps = ceph_inode_set_size(inode, pos); if (check_caps) ceph_check_caps(ceph_inode(inode), CHECK_CAPS_AUTHONLY); } } if (ret != -EOLDSNAPC && written > 0) { ret = written; iocb->ki_pos = pos; } doutc(cl, "returning %d\n", ret); return ret; } /* * Wrap generic_file_aio_read with checks for cap bits on the inode. * Atomically grab references, so that those bits are not released * back to the MDS mid-read. * * Hmm, the sync read case isn't actually async... should it be? */ static ssize_t ceph_read_iter(struct kiocb *iocb, struct iov_iter *to) { struct file *filp = iocb->ki_filp; struct ceph_file_info *fi = filp->private_data; size_t len = iov_iter_count(to); struct inode *inode = file_inode(filp); struct ceph_inode_info *ci = ceph_inode(inode); bool direct_lock = iocb->ki_flags & IOCB_DIRECT; struct ceph_client *cl = ceph_inode_to_client(inode); ssize_t ret; int want = 0, got = 0; int retry_op = 0, read = 0; again: doutc(cl, "%llu~%u trying to get caps on %p %llx.%llx\n", iocb->ki_pos, (unsigned)len, inode, ceph_vinop(inode)); if (ceph_inode_is_shutdown(inode)) return -ESTALE; if (direct_lock) ceph_start_io_direct(inode); else ceph_start_io_read(inode); if (!(fi->flags & CEPH_F_SYNC) && !direct_lock) want |= CEPH_CAP_FILE_CACHE; if (fi->fmode & CEPH_FILE_MODE_LAZY) want |= CEPH_CAP_FILE_LAZYIO; ret = ceph_get_caps(filp, CEPH_CAP_FILE_RD, want, -1, &got); if (ret < 0) { if (direct_lock) ceph_end_io_direct(inode); else ceph_end_io_read(inode); return ret; } if ((got & (CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_LAZYIO)) == 0 || (iocb->ki_flags & IOCB_DIRECT) || (fi->flags & CEPH_F_SYNC)) { doutc(cl, "sync %p %llx.%llx %llu~%u got cap refs on %s\n", inode, ceph_vinop(inode), iocb->ki_pos, (unsigned)len, ceph_cap_string(got)); if (!ceph_has_inline_data(ci)) { if (!retry_op && (iocb->ki_flags & IOCB_DIRECT) && !IS_ENCRYPTED(inode)) { ret = ceph_direct_read_write(iocb, to, NULL, NULL); if (ret >= 0 && ret < len) retry_op = CHECK_EOF; } else { ret = ceph_sync_read(iocb, to, &retry_op); } } else { retry_op = READ_INLINE; } } else { CEPH_DEFINE_RW_CONTEXT(rw_ctx, got); doutc(cl, "async %p %llx.%llx %llu~%u got cap refs on %s\n", inode, ceph_vinop(inode), iocb->ki_pos, (unsigned)len, ceph_cap_string(got)); ceph_add_rw_context(fi, &rw_ctx); ret = generic_file_read_iter(iocb, to); ceph_del_rw_context(fi, &rw_ctx); } doutc(cl, "%p %llx.%llx dropping cap refs on %s = %d\n", inode, ceph_vinop(inode), ceph_cap_string(got), (int)ret); ceph_put_cap_refs(ci, got); if (direct_lock) ceph_end_io_direct(inode); else ceph_end_io_read(inode); if (retry_op > HAVE_RETRIED && ret >= 0) { int statret; struct page *page = NULL; loff_t i_size; int mask = CEPH_STAT_CAP_SIZE; if (retry_op == READ_INLINE) { page = __page_cache_alloc(GFP_KERNEL); if (!page) return -ENOMEM; mask = CEPH_STAT_CAP_INLINE_DATA; } statret = __ceph_do_getattr(inode, page, mask, !!page); if (statret < 0) { if (page) __free_page(page); if (statret == -ENODATA) { BUG_ON(retry_op != READ_INLINE); goto again; } return statret; } i_size = i_size_read(inode); if (retry_op == READ_INLINE) { BUG_ON(ret > 0 || read > 0); if (iocb->ki_pos < i_size && iocb->ki_pos < PAGE_SIZE) { loff_t end = min_t(loff_t, i_size, iocb->ki_pos + len); end = min_t(loff_t, end, PAGE_SIZE); if (statret < end) zero_user_segment(page, statret, end); ret = copy_page_to_iter(page, iocb->ki_pos & ~PAGE_MASK, end - iocb->ki_pos, to); iocb->ki_pos += ret; read += ret; } if (iocb->ki_pos < i_size && read < len) { size_t zlen = min_t(size_t, len - read, i_size - iocb->ki_pos); ret = iov_iter_zero(zlen, to); iocb->ki_pos += ret; read += ret; } __free_pages(page, 0); return read; } /* hit EOF or hole? */ if (retry_op == CHECK_EOF && iocb->ki_pos < i_size && ret < len) { doutc(cl, "may hit hole, ppos %lld < size %lld, reading more\n", iocb->ki_pos, i_size); read += ret; len -= ret; retry_op = HAVE_RETRIED; goto again; } } if (ret >= 0) ret += read; return ret; } /* * Wrap filemap_splice_read with checks for cap bits on the inode. * Atomically grab references, so that those bits are not released * back to the MDS mid-read. */ static ssize_t ceph_splice_read(struct file *in, loff_t *ppos, struct pipe_inode_info *pipe, size_t len, unsigned int flags) { struct ceph_file_info *fi = in->private_data; struct inode *inode = file_inode(in); struct ceph_inode_info *ci = ceph_inode(inode); ssize_t ret; int want = 0, got = 0; CEPH_DEFINE_RW_CONTEXT(rw_ctx, 0); dout("splice_read %p %llx.%llx %llu~%zu trying to get caps on %p\n", inode, ceph_vinop(inode), *ppos, len, inode); if (ceph_inode_is_shutdown(inode)) return -ESTALE; if (ceph_has_inline_data(ci) || (fi->flags & CEPH_F_SYNC)) return copy_splice_read(in, ppos, pipe, len, flags); ceph_start_io_read(inode); want = CEPH_CAP_FILE_CACHE; if (fi->fmode & CEPH_FILE_MODE_LAZY) want |= CEPH_CAP_FILE_LAZYIO; ret = ceph_get_caps(in, CEPH_CAP_FILE_RD, want, -1, &got); if (ret < 0) goto out_end; if ((got & (CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_LAZYIO)) == 0) { dout("splice_read/sync %p %llx.%llx %llu~%zu got cap refs on %s\n", inode, ceph_vinop(inode), *ppos, len, ceph_cap_string(got)); ceph_put_cap_refs(ci, got); ceph_end_io_read(inode); return copy_splice_read(in, ppos, pipe, len, flags); } dout("splice_read %p %llx.%llx %llu~%zu got cap refs on %s\n", inode, ceph_vinop(inode), *ppos, len, ceph_cap_string(got)); rw_ctx.caps = got; ceph_add_rw_context(fi, &rw_ctx); ret = filemap_splice_read(in, ppos, pipe, len, flags); ceph_del_rw_context(fi, &rw_ctx); dout("splice_read %p %llx.%llx dropping cap refs on %s = %zd\n", inode, ceph_vinop(inode), ceph_cap_string(got), ret); ceph_put_cap_refs(ci, got); out_end: ceph_end_io_read(inode); return ret; } /* * Take cap references to avoid releasing caps to MDS mid-write. * * If we are synchronous, and write with an old snap context, the OSD * may return EOLDSNAPC. In that case, retry the write.. _after_ * dropping our cap refs and allowing the pending snap to logically * complete _before_ this write occurs. * * If we are near ENOSPC, write synchronously. */ static ssize_t ceph_write_iter(struct kiocb *iocb, struct iov_iter *from) { struct file *file = iocb->ki_filp; struct ceph_file_info *fi = file->private_data; struct inode *inode = file_inode(file); struct ceph_inode_info *ci = ceph_inode(inode); struct ceph_fs_client *fsc = ceph_inode_to_fs_client(inode); struct ceph_client *cl = fsc->client; struct ceph_osd_client *osdc = &fsc->client->osdc; struct ceph_cap_flush *prealloc_cf; ssize_t count, written = 0; int err, want = 0, got; bool direct_lock = false; u32 map_flags; u64 pool_flags; loff_t pos; loff_t limit = max(i_size_read(inode), fsc->max_file_size); if (ceph_inode_is_shutdown(inode)) return -ESTALE; if (ceph_snap(inode) != CEPH_NOSNAP) return -EROFS; prealloc_cf = ceph_alloc_cap_flush(); if (!prealloc_cf) return -ENOMEM; if ((iocb->ki_flags & (IOCB_DIRECT | IOCB_APPEND)) == IOCB_DIRECT) direct_lock = true; retry_snap: if (direct_lock) ceph_start_io_direct(inode); else ceph_start_io_write(inode); if (iocb->ki_flags & IOCB_APPEND) { err = ceph_do_getattr(inode, CEPH_STAT_CAP_SIZE, false); if (err < 0) goto out; } err = generic_write_checks(iocb, from); if (err <= 0) goto out; pos = iocb->ki_pos; if (unlikely(pos >= limit)) { err = -EFBIG; goto out; } else { iov_iter_truncate(from, limit - pos); } count = iov_iter_count(from); if (ceph_quota_is_max_bytes_exceeded(inode, pos + count)) { err = -EDQUOT; goto out; } down_read(&osdc->lock); map_flags = osdc->osdmap->flags; pool_flags = ceph_pg_pool_flags(osdc->osdmap, ci->i_layout.pool_id); up_read(&osdc->lock); if ((map_flags & CEPH_OSDMAP_FULL) || (pool_flags & CEPH_POOL_FLAG_FULL)) { err = -ENOSPC; goto out; } err = file_remove_privs(file); if (err) goto out; doutc(cl, "%p %llx.%llx %llu~%zd getting caps. i_size %llu\n", inode, ceph_vinop(inode), pos, count, i_size_read(inode)); if (!(fi->flags & CEPH_F_SYNC) && !direct_lock) want |= CEPH_CAP_FILE_BUFFER; if (fi->fmode & CEPH_FILE_MODE_LAZY) want |= CEPH_CAP_FILE_LAZYIO; got = 0; err = ceph_get_caps(file, CEPH_CAP_FILE_WR, want, pos + count, &got); if (err < 0) goto out; err = file_update_time(file); if (err) goto out_caps; inode_inc_iversion_raw(inode); doutc(cl, "%p %llx.%llx %llu~%zd got cap refs on %s\n", inode, ceph_vinop(inode), pos, count, ceph_cap_string(got)); if ((got & (CEPH_CAP_FILE_BUFFER|CEPH_CAP_FILE_LAZYIO)) == 0 || (iocb->ki_flags & IOCB_DIRECT) || (fi->flags & CEPH_F_SYNC) || (ci->i_ceph_flags & CEPH_I_ERROR_WRITE)) { struct ceph_snap_context *snapc; struct iov_iter data; spin_lock(&ci->i_ceph_lock); if (__ceph_have_pending_cap_snap(ci)) { struct ceph_cap_snap *capsnap = list_last_entry(&ci->i_cap_snaps, struct ceph_cap_snap, ci_item); snapc = ceph_get_snap_context(capsnap->context); } else { BUG_ON(!ci->i_head_snapc); snapc = ceph_get_snap_context(ci->i_head_snapc); } spin_unlock(&ci->i_ceph_lock); /* we might need to revert back to that point */ data = *from; if ((iocb->ki_flags & IOCB_DIRECT) && !IS_ENCRYPTED(inode)) written = ceph_direct_read_write(iocb, &data, snapc, &prealloc_cf); else written = ceph_sync_write(iocb, &data, pos, snapc); if (direct_lock) ceph_end_io_direct(inode); else ceph_end_io_write(inode); if (written > 0) iov_iter_advance(from, written); ceph_put_snap_context(snapc); } else { /* * No need to acquire the i_truncate_mutex. Because * the MDS revokes Fwb caps before sending truncate * message to us. We can't get Fwb cap while there * are pending vmtruncate. So write and vmtruncate * can not run at the same time */ written = generic_perform_write(iocb, from); ceph_end_io_write(inode); } if (written >= 0) { int dirty; spin_lock(&ci->i_ceph_lock); dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_FILE_WR, &prealloc_cf); spin_unlock(&ci->i_ceph_lock); if (dirty) __mark_inode_dirty(inode, dirty); if (ceph_quota_is_max_bytes_approaching(inode, iocb->ki_pos)) ceph_check_caps(ci, CHECK_CAPS_FLUSH); } doutc(cl, "%p %llx.%llx %llu~%u dropping cap refs on %s\n", inode, ceph_vinop(inode), pos, (unsigned)count, ceph_cap_string(got)); ceph_put_cap_refs(ci, got); if (written == -EOLDSNAPC) { doutc(cl, "%p %llx.%llx %llu~%u" "got EOLDSNAPC, retrying\n", inode, ceph_vinop(inode), pos, (unsigned)count); goto retry_snap; } if (written >= 0) { if ((map_flags & CEPH_OSDMAP_NEARFULL) || (pool_flags & CEPH_POOL_FLAG_NEARFULL)) iocb->ki_flags |= IOCB_DSYNC; written = generic_write_sync(iocb, written); } goto out_unlocked; out_caps: ceph_put_cap_refs(ci, got); out: if (direct_lock) ceph_end_io_direct(inode); else ceph_end_io_write(inode); out_unlocked: ceph_free_cap_flush(prealloc_cf); return written ? written : err; } /* * llseek. be sure to verify file size on SEEK_END. */ static loff_t ceph_llseek(struct file *file, loff_t offset, int whence) { if (whence == SEEK_END || whence == SEEK_DATA || whence == SEEK_HOLE) { struct inode *inode = file_inode(file); int ret; ret = ceph_do_getattr(inode, CEPH_STAT_CAP_SIZE, false); if (ret < 0) return ret; } return generic_file_llseek(file, offset, whence); } static inline void ceph_zero_partial_page( struct inode *inode, loff_t offset, unsigned size) { struct page *page; pgoff_t index = offset >> PAGE_SHIFT; page = find_lock_page(inode->i_mapping, index); if (page) { wait_on_page_writeback(page); zero_user(page, offset & (PAGE_SIZE - 1), size); unlock_page(page); put_page(page); } } static void ceph_zero_pagecache_range(struct inode *inode, loff_t offset, loff_t length) { loff_t nearly = round_up(offset, PAGE_SIZE); if (offset < nearly) { loff_t size = nearly - offset; if (length < size) size = length; ceph_zero_partial_page(inode, offset, size); offset += size; length -= size; } if (length >= PAGE_SIZE) { loff_t size = round_down(length, PAGE_SIZE); truncate_pagecache_range(inode, offset, offset + size - 1); offset += size; length -= size; } if (length) ceph_zero_partial_page(inode, offset, length); } static int ceph_zero_partial_object(struct inode *inode, loff_t offset, loff_t *length) { struct ceph_inode_info *ci = ceph_inode(inode); struct ceph_fs_client *fsc = ceph_inode_to_fs_client(inode); struct ceph_osd_request *req; int ret = 0; loff_t zero = 0; int op; if (ceph_inode_is_shutdown(inode)) return -EIO; if (!length) { op = offset ? CEPH_OSD_OP_DELETE : CEPH_OSD_OP_TRUNCATE; length = &zero; } else { op = CEPH_OSD_OP_ZERO; } req = ceph_osdc_new_request(&fsc->client->osdc, &ci->i_layout, ceph_vino(inode), offset, length, 0, 1, op, CEPH_OSD_FLAG_WRITE, NULL, 0, 0, false); if (IS_ERR(req)) { ret = PTR_ERR(req); goto out; } req->r_mtime = inode_get_mtime(inode); ceph_osdc_start_request(&fsc->client->osdc, req); ret = ceph_osdc_wait_request(&fsc->client->osdc, req); if (ret == -ENOENT) ret = 0; ceph_osdc_put_request(req); out: return ret; } static int ceph_zero_objects(struct inode *inode, loff_t offset, loff_t length) { int ret = 0; struct ceph_inode_info *ci = ceph_inode(inode); s32 stripe_unit = ci->i_layout.stripe_unit; s32 stripe_count = ci->i_layout.stripe_count; s32 object_size = ci->i_layout.object_size; u64 object_set_size = object_size * stripe_count; u64 nearly, t; /* round offset up to next period boundary */ nearly = offset + object_set_size - 1; t = nearly; nearly -= do_div(t, object_set_size); while (length && offset < nearly) { loff_t size = length; ret = ceph_zero_partial_object(inode, offset, &size); if (ret < 0) return ret; offset += size; length -= size; } while (length >= object_set_size) { int i; loff_t pos = offset; for (i = 0; i < stripe_count; ++i) { ret = ceph_zero_partial_object(inode, pos, NULL); if (ret < 0) return ret; pos += stripe_unit; } offset += object_set_size; length -= object_set_size; } while (length) { loff_t size = length; ret = ceph_zero_partial_object(inode, offset, &size); if (ret < 0) return ret; offset += size; length -= size; } return ret; } static long ceph_fallocate(struct file *file, int mode, loff_t offset, loff_t length) { struct ceph_file_info *fi = file->private_data; struct inode *inode = file_inode(file); struct ceph_inode_info *ci = ceph_inode(inode); struct ceph_cap_flush *prealloc_cf; struct ceph_client *cl = ceph_inode_to_client(inode); int want, got = 0; int dirty; int ret = 0; loff_t endoff = 0; loff_t size; doutc(cl, "%p %llx.%llx mode %x, offset %llu length %llu\n", inode, ceph_vinop(inode), mode, offset, length); if (mode != (FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE)) return -EOPNOTSUPP; if (!S_ISREG(inode->i_mode)) return -EOPNOTSUPP; if (IS_ENCRYPTED(inode)) return -EOPNOTSUPP; prealloc_cf = ceph_alloc_cap_flush(); if (!prealloc_cf) return -ENOMEM; inode_lock(inode); if (ceph_snap(inode) != CEPH_NOSNAP) { ret = -EROFS; goto unlock; } size = i_size_read(inode); /* Are we punching a hole beyond EOF? */ if (offset >= size) goto unlock; if ((offset + length) > size) length = size - offset; if (fi->fmode & CEPH_FILE_MODE_LAZY) want = CEPH_CAP_FILE_BUFFER | CEPH_CAP_FILE_LAZYIO; else want = CEPH_CAP_FILE_BUFFER; ret = ceph_get_caps(file, CEPH_CAP_FILE_WR, want, endoff, &got); if (ret < 0) goto unlock; ret = file_modified(file); if (ret) goto put_caps; filemap_invalidate_lock(inode->i_mapping); ceph_fscache_invalidate(inode, false); ceph_zero_pagecache_range(inode, offset, length); ret = ceph_zero_objects(inode, offset, length); if (!ret) { spin_lock(&ci->i_ceph_lock); dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_FILE_WR, &prealloc_cf); spin_unlock(&ci->i_ceph_lock); if (dirty) __mark_inode_dirty(inode, dirty); } filemap_invalidate_unlock(inode->i_mapping); put_caps: ceph_put_cap_refs(ci, got); unlock: inode_unlock(inode); ceph_free_cap_flush(prealloc_cf); return ret; } /* * This function tries to get FILE_WR capabilities for dst_ci and FILE_RD for * src_ci. Two attempts are made to obtain both caps, and an error is return if * this fails; zero is returned on success. */ static int get_rd_wr_caps(struct file *src_filp, int *src_got, struct file *dst_filp, loff_t dst_endoff, int *dst_got) { int ret = 0; bool retrying = false; retry_caps: ret = ceph_get_caps(dst_filp, CEPH_CAP_FILE_WR, CEPH_CAP_FILE_BUFFER, dst_endoff, dst_got); if (ret < 0) return ret; /* * Since we're already holding the FILE_WR capability for the dst file, * we would risk a deadlock by using ceph_get_caps. Thus, we'll do some * retry dance instead to try to get both capabilities. */ ret = ceph_try_get_caps(file_inode(src_filp), CEPH_CAP_FILE_RD, CEPH_CAP_FILE_SHARED, false, src_got); if (ret <= 0) { /* Start by dropping dst_ci caps and getting src_ci caps */ ceph_put_cap_refs(ceph_inode(file_inode(dst_filp)), *dst_got); if (retrying) { if (!ret) /* ceph_try_get_caps masks EAGAIN */ ret = -EAGAIN; return ret; } ret = ceph_get_caps(src_filp, CEPH_CAP_FILE_RD, CEPH_CAP_FILE_SHARED, -1, src_got); if (ret < 0) return ret; /*... drop src_ci caps too, and retry */ ceph_put_cap_refs(ceph_inode(file_inode(src_filp)), *src_got); retrying = true; goto retry_caps; } return ret; } static void put_rd_wr_caps(struct ceph_inode_info *src_ci, int src_got, struct ceph_inode_info *dst_ci, int dst_got) { ceph_put_cap_refs(src_ci, src_got); ceph_put_cap_refs(dst_ci, dst_got); } /* * This function does several size-related checks, returning an error if: * - source file is smaller than off+len * - destination file size is not OK (inode_newsize_ok()) * - max bytes quotas is exceeded */ static int is_file_size_ok(struct inode *src_inode, struct inode *dst_inode, loff_t src_off, loff_t dst_off, size_t len) { struct ceph_client *cl = ceph_inode_to_client(src_inode); loff_t size, endoff; size = i_size_read(src_inode); /* * Don't copy beyond source file EOF. Instead of simply setting length * to (size - src_off), just drop to VFS default implementation, as the * local i_size may be stale due to other clients writing to the source * inode. */ if (src_off + len > size) { doutc(cl, "Copy beyond EOF (%llu + %zu > %llu)\n", src_off, len, size); return -EOPNOTSUPP; } size = i_size_read(dst_inode); endoff = dst_off + len; if (inode_newsize_ok(dst_inode, endoff)) return -EOPNOTSUPP; if (ceph_quota_is_max_bytes_exceeded(dst_inode, endoff)) return -EDQUOT; return 0; } static struct ceph_osd_request * ceph_alloc_copyfrom_request(struct ceph_osd_client *osdc, u64 src_snapid, struct ceph_object_id *src_oid, struct ceph_object_locator *src_oloc, struct ceph_object_id *dst_oid, struct ceph_object_locator *dst_oloc, u32 truncate_seq, u64 truncate_size) { struct ceph_osd_request *req; int ret; u32 src_fadvise_flags = CEPH_OSD_OP_FLAG_FADVISE_SEQUENTIAL | CEPH_OSD_OP_FLAG_FADVISE_NOCACHE; u32 dst_fadvise_flags = CEPH_OSD_OP_FLAG_FADVISE_SEQUENTIAL | CEPH_OSD_OP_FLAG_FADVISE_DONTNEED; req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_KERNEL); if (!req) return ERR_PTR(-ENOMEM); req->r_flags = CEPH_OSD_FLAG_WRITE; ceph_oloc_copy(&req->r_t.base_oloc, dst_oloc); ceph_oid_copy(&req->r_t.base_oid, dst_oid); ret = osd_req_op_copy_from_init(req, src_snapid, 0, src_oid, src_oloc, src_fadvise_flags, dst_fadvise_flags, truncate_seq, truncate_size, CEPH_OSD_COPY_FROM_FLAG_TRUNCATE_SEQ); if (ret) goto out; ret = ceph_osdc_alloc_messages(req, GFP_KERNEL); if (ret) goto out; return req; out: ceph_osdc_put_request(req); return ERR_PTR(ret); } static ssize_t ceph_do_objects_copy(struct ceph_inode_info *src_ci, u64 *src_off, struct ceph_inode_info *dst_ci, u64 *dst_off, struct ceph_fs_client *fsc, size_t len, unsigned int flags) { struct ceph_object_locator src_oloc, dst_oloc; struct ceph_object_id src_oid, dst_oid; struct ceph_osd_client *osdc; struct ceph_osd_request *req; size_t bytes = 0; u64 src_objnum, src_objoff, dst_objnum, dst_objoff; u32 src_objlen, dst_objlen; u32 object_size = src_ci->i_layout.object_size; struct ceph_client *cl = fsc->client; int ret; src_oloc.pool = src_ci->i_layout.pool_id; src_oloc.pool_ns = ceph_try_get_string(src_ci->i_layout.pool_ns); dst_oloc.pool = dst_ci->i_layout.pool_id; dst_oloc.pool_ns = ceph_try_get_string(dst_ci->i_layout.pool_ns); osdc = &fsc->client->osdc; while (len >= object_size) { ceph_calc_file_object_mapping(&src_ci->i_layout, *src_off, object_size, &src_objnum, &src_objoff, &src_objlen); ceph_calc_file_object_mapping(&dst_ci->i_layout, *dst_off, object_size, &dst_objnum, &dst_objoff, &dst_objlen); ceph_oid_init(&src_oid); ceph_oid_printf(&src_oid, "%llx.%08llx", src_ci->i_vino.ino, src_objnum); ceph_oid_init(&dst_oid); ceph_oid_printf(&dst_oid, "%llx.%08llx", dst_ci->i_vino.ino, dst_objnum); /* Do an object remote copy */ req = ceph_alloc_copyfrom_request(osdc, src_ci->i_vino.snap, &src_oid, &src_oloc, &dst_oid, &dst_oloc, dst_ci->i_truncate_seq, dst_ci->i_truncate_size); if (IS_ERR(req)) ret = PTR_ERR(req); else { ceph_osdc_start_request(osdc, req); ret = ceph_osdc_wait_request(osdc, req); ceph_update_copyfrom_metrics(&fsc->mdsc->metric, req->r_start_latency, req->r_end_latency, object_size, ret); ceph_osdc_put_request(req); } if (ret) { if (ret == -EOPNOTSUPP) { fsc->have_copy_from2 = false; pr_notice_client(cl, "OSDs don't support copy-from2; disabling copy offload\n"); } doutc(cl, "returned %d\n", ret); if (!bytes) bytes = ret; goto out; } len -= object_size; bytes += object_size; *src_off += object_size; *dst_off += object_size; } out: ceph_oloc_destroy(&src_oloc); ceph_oloc_destroy(&dst_oloc); return bytes; } static ssize_t __ceph_copy_file_range(struct file *src_file, loff_t src_off, struct file *dst_file, loff_t dst_off, size_t len, unsigned int flags) { struct inode *src_inode = file_inode(src_file); struct inode *dst_inode = file_inode(dst_file); struct ceph_inode_info *src_ci = ceph_inode(src_inode); struct ceph_inode_info *dst_ci = ceph_inode(dst_inode); struct ceph_cap_flush *prealloc_cf; struct ceph_fs_client *src_fsc = ceph_inode_to_fs_client(src_inode); struct ceph_client *cl = src_fsc->client; loff_t size; ssize_t ret = -EIO, bytes; u64 src_objnum, dst_objnum, src_objoff, dst_objoff; u32 src_objlen, dst_objlen; int src_got = 0, dst_got = 0, err, dirty; if (src_inode->i_sb != dst_inode->i_sb) { struct ceph_fs_client *dst_fsc = ceph_inode_to_fs_client(dst_inode); if (ceph_fsid_compare(&src_fsc->client->fsid, &dst_fsc->client->fsid)) { dout("Copying files across clusters: src: %pU dst: %pU\n", &src_fsc->client->fsid, &dst_fsc->client->fsid); return -EXDEV; } } if (ceph_snap(dst_inode) != CEPH_NOSNAP) return -EROFS; /* * Some of the checks below will return -EOPNOTSUPP, which will force a * fallback to the default VFS copy_file_range implementation. This is * desirable in several cases (for ex, the 'len' is smaller than the * size of the objects, or in cases where that would be more * efficient). */ if (ceph_test_mount_opt(src_fsc, NOCOPYFROM)) return -EOPNOTSUPP; if (!src_fsc->have_copy_from2) return -EOPNOTSUPP; /* * Striped file layouts require that we copy partial objects, but the * OSD copy-from operation only supports full-object copies. Limit * this to non-striped file layouts for now. */ if ((src_ci->i_layout.stripe_unit != dst_ci->i_layout.stripe_unit) || (src_ci->i_layout.stripe_count != 1) || (dst_ci->i_layout.stripe_count != 1) || (src_ci->i_layout.object_size != dst_ci->i_layout.object_size)) { doutc(cl, "Invalid src/dst files layout\n"); return -EOPNOTSUPP; } /* Every encrypted inode gets its own key, so we can't offload them */ if (IS_ENCRYPTED(src_inode) || IS_ENCRYPTED(dst_inode)) return -EOPNOTSUPP; if (len < src_ci->i_layout.object_size) return -EOPNOTSUPP; /* no remote copy will be done */ prealloc_cf = ceph_alloc_cap_flush(); if (!prealloc_cf) return -ENOMEM; /* Start by sync'ing the source and destination files */ ret = file_write_and_wait_range(src_file, src_off, (src_off + len)); if (ret < 0) { doutc(cl, "failed to write src file (%zd)\n", ret); goto out; } ret = file_write_and_wait_range(dst_file, dst_off, (dst_off + len)); if (ret < 0) { doutc(cl, "failed to write dst file (%zd)\n", ret); goto out; } /* * We need FILE_WR caps for dst_ci and FILE_RD for src_ci as other * clients may have dirty data in their caches. And OSDs know nothing * about caps, so they can't safely do the remote object copies. */ err = get_rd_wr_caps(src_file, &src_got, dst_file, (dst_off + len), &dst_got); if (err < 0) { doutc(cl, "get_rd_wr_caps returned %d\n", err); ret = -EOPNOTSUPP; goto out; } ret = is_file_size_ok(src_inode, dst_inode, src_off, dst_off, len); if (ret < 0) goto out_caps; /* Drop dst file cached pages */ ceph_fscache_invalidate(dst_inode, false); ret = invalidate_inode_pages2_range(dst_inode->i_mapping, dst_off >> PAGE_SHIFT, (dst_off + len) >> PAGE_SHIFT); if (ret < 0) { doutc(cl, "Failed to invalidate inode pages (%zd)\n", ret); ret = 0; /* XXX */ } ceph_calc_file_object_mapping(&src_ci->i_layout, src_off, src_ci->i_layout.object_size, &src_objnum, &src_objoff, &src_objlen); ceph_calc_file_object_mapping(&dst_ci->i_layout, dst_off, dst_ci->i_layout.object_size, &dst_objnum, &dst_objoff, &dst_objlen); /* object-level offsets need to the same */ if (src_objoff != dst_objoff) { ret = -EOPNOTSUPP; goto out_caps; } /* * Do a manual copy if the object offset isn't object aligned. * 'src_objlen' contains the bytes left until the end of the object, * starting at the src_off */ if (src_objoff) { doutc(cl, "Initial partial copy of %u bytes\n", src_objlen); /* * we need to temporarily drop all caps as we'll be calling * {read,write}_iter, which will get caps again. */ put_rd_wr_caps(src_ci, src_got, dst_ci, dst_got); ret = splice_file_range(src_file, &src_off, dst_file, &dst_off, src_objlen); /* Abort on short copies or on error */ if (ret < (long)src_objlen) { doutc(cl, "Failed partial copy (%zd)\n", ret); goto out; } len -= ret; err = get_rd_wr_caps(src_file, &src_got, dst_file, (dst_off + len), &dst_got); if (err < 0) goto out; err = is_file_size_ok(src_inode, dst_inode, src_off, dst_off, len); if (err < 0) goto out_caps; } size = i_size_read(dst_inode); bytes = ceph_do_objects_copy(src_ci, &src_off, dst_ci, &dst_off, src_fsc, len, flags); if (bytes <= 0) { if (!ret) ret = bytes; goto out_caps; } doutc(cl, "Copied %zu bytes out of %zu\n", bytes, len); len -= bytes; ret += bytes; file_update_time(dst_file); inode_inc_iversion_raw(dst_inode); if (dst_off > size) { /* Let the MDS know about dst file size change */ if (ceph_inode_set_size(dst_inode, dst_off) || ceph_quota_is_max_bytes_approaching(dst_inode, dst_off)) ceph_check_caps(dst_ci, CHECK_CAPS_AUTHONLY | CHECK_CAPS_FLUSH); } /* Mark Fw dirty */ spin_lock(&dst_ci->i_ceph_lock); dirty = __ceph_mark_dirty_caps(dst_ci, CEPH_CAP_FILE_WR, &prealloc_cf); spin_unlock(&dst_ci->i_ceph_lock); if (dirty) __mark_inode_dirty(dst_inode, dirty); out_caps: put_rd_wr_caps(src_ci, src_got, dst_ci, dst_got); /* * Do the final manual copy if we still have some bytes left, unless * there were errors in remote object copies (len >= object_size). */ if (len && (len < src_ci->i_layout.object_size)) { doutc(cl, "Final partial copy of %zu bytes\n", len); bytes = splice_file_range(src_file, &src_off, dst_file, &dst_off, len); if (bytes > 0) ret += bytes; else doutc(cl, "Failed partial copy (%zd)\n", bytes); } out: ceph_free_cap_flush(prealloc_cf); return ret; } static ssize_t ceph_copy_file_range(struct file *src_file, loff_t src_off, struct file *dst_file, loff_t dst_off, size_t len, unsigned int flags) { ssize_t ret; ret = __ceph_copy_file_range(src_file, src_off, dst_file, dst_off, len, flags); if (ret == -EOPNOTSUPP || ret == -EXDEV) ret = splice_copy_file_range(src_file, src_off, dst_file, dst_off, len); return ret; } const struct file_operations ceph_file_fops = { .open = ceph_open, .release = ceph_release, .llseek = ceph_llseek, .read_iter = ceph_read_iter, .write_iter = ceph_write_iter, .mmap = ceph_mmap, .fsync = ceph_fsync, .lock = ceph_lock, .setlease = simple_nosetlease, .flock = ceph_flock, .splice_read = ceph_splice_read, .splice_write = iter_file_splice_write, .unlocked_ioctl = ceph_ioctl, .compat_ioctl = compat_ptr_ioctl, .fallocate = ceph_fallocate, .copy_file_range = ceph_copy_file_range, };
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