![Greg Kroah-Hartman](/assets/img/avatar_default.png)
Many source files in the tree are missing licensing information, which makes it harder for compliance tools to determine the correct license. By default all files without license information are under the default license of the kernel, which is GPL version 2. Update the files which contain no license information with the 'GPL-2.0' SPDX license identifier. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This patch is based on work done by Thomas Gleixner and Kate Stewart and Philippe Ombredanne. How this work was done: Patches were generated and checked against linux-4.14-rc6 for a subset of the use cases: - file had no licensing information it it. - file was a */uapi/* one with no licensing information in it, - file was a */uapi/* one with existing licensing information, Further patches will be generated in subsequent months to fix up cases where non-standard license headers were used, and references to license had to be inferred by heuristics based on keywords. The analysis to determine which SPDX License Identifier to be applied to a file was done in a spreadsheet of side by side results from of the output of two independent scanners (ScanCode & Windriver) producing SPDX tag:value files created by Philippe Ombredanne. Philippe prepared the base worksheet, and did an initial spot review of a few 1000 files. The 4.13 kernel was the starting point of the analysis with 60,537 files assessed. Kate Stewart did a file by file comparison of the scanner results in the spreadsheet to determine which SPDX license identifier(s) to be applied to the file. She confirmed any determination that was not immediately clear with lawyers working with the Linux Foundation. Criteria used to select files for SPDX license identifier tagging was: - Files considered eligible had to be source code files. - Make and config files were included as candidates if they contained >5 lines of source - File already had some variant of a license header in it (even if <5 lines). All documentation files were explicitly excluded. The following heuristics were used to determine which SPDX license identifiers to apply. - when both scanners couldn't find any license traces, file was considered to have no license information in it, and the top level COPYING file license applied. For non */uapi/* files that summary was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 11139 and resulted in the first patch in this series. If that file was a */uapi/* path one, it was "GPL-2.0 WITH Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 WITH Linux-syscall-note 930 and resulted in the second patch in this series. - if a file had some form of licensing information in it, and was one of the */uapi/* ones, it was denoted with the Linux-syscall-note if any GPL family license was found in the file or had no licensing in it (per prior point). Results summary: SPDX license identifier # files ---------------------------------------------------|------ GPL-2.0 WITH Linux-syscall-note 270 GPL-2.0+ WITH Linux-syscall-note 169 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17 LGPL-2.1+ WITH Linux-syscall-note 15 GPL-1.0+ WITH Linux-syscall-note 14 ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5 LGPL-2.0+ WITH Linux-syscall-note 4 LGPL-2.1 WITH Linux-syscall-note 3 ((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3 ((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1 and that resulted in the third patch in this series. - when the two scanners agreed on the detected license(s), that became the concluded license(s). - when there was disagreement between the two scanners (one detected a license but the other didn't, or they both detected different licenses) a manual inspection of the file occurred. - In most cases a manual inspection of the information in the file resulted in a clear resolution of the license that should apply (and which scanner probably needed to revisit its heuristics). - When it was not immediately clear, the license identifier was confirmed with lawyers working with the Linux Foundation. - If there was any question as to the appropriate license identifier, the file was flagged for further research and to be revisited later in time. In total, over 70 hours of logged manual review was done on the spreadsheet to determine the SPDX license identifiers to apply to the source files by Kate, Philippe, Thomas and, in some cases, confirmation by lawyers working with the Linux Foundation. Kate also obtained a third independent scan of the 4.13 code base from FOSSology, and compared selected files where the other two scanners disagreed against that SPDX file, to see if there was new insights. The Windriver scanner is based on an older version of FOSSology in part, so they are related. Thomas did random spot checks in about 500 files from the spreadsheets for the uapi headers and agreed with SPDX license identifier in the files he inspected. For the non-uapi files Thomas did random spot checks in about 15000 files. In initial set of patches against 4.14-rc6, 3 files were found to have copy/paste license identifier errors, and have been fixed to reflect the correct identifier. Additionally Philippe spent 10 hours this week doing a detailed manual inspection and review of the 12,461 patched files from the initial patch version early this week with: - a full scancode scan run, collecting the matched texts, detected license ids and scores - reviewing anything where there was a license detected (about 500+ files) to ensure that the applied SPDX license was correct - reviewing anything where there was no detection but the patch license was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied SPDX license was correct This produced a worksheet with 20 files needing minor correction. This worksheet was then exported into 3 different .csv files for the different types of files to be modified. These .csv files were then reviewed by Greg. Thomas wrote a script to parse the csv files and add the proper SPDX tag to the file, in the format that the file expected. This script was further refined by Greg based on the output to detect more types of files automatically and to distinguish between header and source .c files (which need different comment types.) Finally Greg ran the script using the .csv files to generate the patches. Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2227 lines
60 KiB
C
2227 lines
60 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/ceph/ceph_debug.h>
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#include <linux/module.h>
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#include <linux/fs.h>
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#include <linux/slab.h>
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#include <linux/string.h>
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#include <linux/uaccess.h>
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#include <linux/kernel.h>
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#include <linux/writeback.h>
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#include <linux/vmalloc.h>
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#include <linux/xattr.h>
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#include <linux/posix_acl.h>
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#include <linux/random.h>
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#include <linux/sort.h>
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#include "super.h"
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#include "mds_client.h"
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#include "cache.h"
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#include <linux/ceph/decode.h>
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/*
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* Ceph inode operations
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*
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* Implement basic inode helpers (get, alloc) and inode ops (getattr,
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* setattr, etc.), xattr helpers, and helpers for assimilating
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* metadata returned by the MDS into our cache.
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*
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* Also define helpers for doing asynchronous writeback, invalidation,
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* and truncation for the benefit of those who can't afford to block
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* (typically because they are in the message handler path).
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*/
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static const struct inode_operations ceph_symlink_iops;
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static void ceph_invalidate_work(struct work_struct *work);
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static void ceph_writeback_work(struct work_struct *work);
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static void ceph_vmtruncate_work(struct work_struct *work);
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/*
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* find or create an inode, given the ceph ino number
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*/
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static int ceph_set_ino_cb(struct inode *inode, void *data)
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{
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ceph_inode(inode)->i_vino = *(struct ceph_vino *)data;
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inode->i_ino = ceph_vino_to_ino(*(struct ceph_vino *)data);
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return 0;
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}
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struct inode *ceph_get_inode(struct super_block *sb, struct ceph_vino vino)
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{
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struct inode *inode;
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ino_t t = ceph_vino_to_ino(vino);
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inode = iget5_locked(sb, t, ceph_ino_compare, ceph_set_ino_cb, &vino);
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if (!inode)
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return ERR_PTR(-ENOMEM);
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if (inode->i_state & I_NEW) {
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dout("get_inode created new inode %p %llx.%llx ino %llx\n",
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inode, ceph_vinop(inode), (u64)inode->i_ino);
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unlock_new_inode(inode);
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}
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dout("get_inode on %lu=%llx.%llx got %p\n", inode->i_ino, vino.ino,
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vino.snap, inode);
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return inode;
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}
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/*
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* get/constuct snapdir inode for a given directory
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*/
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struct inode *ceph_get_snapdir(struct inode *parent)
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{
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struct ceph_vino vino = {
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.ino = ceph_ino(parent),
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.snap = CEPH_SNAPDIR,
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};
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struct inode *inode = ceph_get_inode(parent->i_sb, vino);
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struct ceph_inode_info *ci = ceph_inode(inode);
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BUG_ON(!S_ISDIR(parent->i_mode));
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if (IS_ERR(inode))
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return inode;
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inode->i_mode = parent->i_mode;
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inode->i_uid = parent->i_uid;
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inode->i_gid = parent->i_gid;
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inode->i_op = &ceph_snapdir_iops;
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inode->i_fop = &ceph_snapdir_fops;
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ci->i_snap_caps = CEPH_CAP_PIN; /* so we can open */
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ci->i_rbytes = 0;
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return inode;
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}
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const struct inode_operations ceph_file_iops = {
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.permission = ceph_permission,
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.setattr = ceph_setattr,
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.getattr = ceph_getattr,
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.listxattr = ceph_listxattr,
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.get_acl = ceph_get_acl,
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.set_acl = ceph_set_acl,
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};
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/*
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* We use a 'frag tree' to keep track of the MDS's directory fragments
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* for a given inode (usually there is just a single fragment). We
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* need to know when a child frag is delegated to a new MDS, or when
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* it is flagged as replicated, so we can direct our requests
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* accordingly.
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*/
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/*
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* find/create a frag in the tree
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*/
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static struct ceph_inode_frag *__get_or_create_frag(struct ceph_inode_info *ci,
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u32 f)
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{
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struct rb_node **p;
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struct rb_node *parent = NULL;
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struct ceph_inode_frag *frag;
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int c;
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p = &ci->i_fragtree.rb_node;
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while (*p) {
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parent = *p;
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frag = rb_entry(parent, struct ceph_inode_frag, node);
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c = ceph_frag_compare(f, frag->frag);
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if (c < 0)
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p = &(*p)->rb_left;
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else if (c > 0)
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p = &(*p)->rb_right;
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else
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return frag;
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}
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frag = kmalloc(sizeof(*frag), GFP_NOFS);
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if (!frag)
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return ERR_PTR(-ENOMEM);
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frag->frag = f;
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frag->split_by = 0;
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frag->mds = -1;
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frag->ndist = 0;
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rb_link_node(&frag->node, parent, p);
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rb_insert_color(&frag->node, &ci->i_fragtree);
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dout("get_or_create_frag added %llx.%llx frag %x\n",
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ceph_vinop(&ci->vfs_inode), f);
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return frag;
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}
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/*
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* find a specific frag @f
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*/
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struct ceph_inode_frag *__ceph_find_frag(struct ceph_inode_info *ci, u32 f)
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{
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struct rb_node *n = ci->i_fragtree.rb_node;
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while (n) {
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struct ceph_inode_frag *frag =
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rb_entry(n, struct ceph_inode_frag, node);
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int c = ceph_frag_compare(f, frag->frag);
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if (c < 0)
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n = n->rb_left;
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else if (c > 0)
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n = n->rb_right;
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else
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return frag;
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}
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return NULL;
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}
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/*
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* Choose frag containing the given value @v. If @pfrag is
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* specified, copy the frag delegation info to the caller if
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* it is present.
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*/
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static u32 __ceph_choose_frag(struct ceph_inode_info *ci, u32 v,
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struct ceph_inode_frag *pfrag, int *found)
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{
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u32 t = ceph_frag_make(0, 0);
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struct ceph_inode_frag *frag;
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unsigned nway, i;
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u32 n;
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if (found)
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*found = 0;
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while (1) {
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WARN_ON(!ceph_frag_contains_value(t, v));
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frag = __ceph_find_frag(ci, t);
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if (!frag)
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break; /* t is a leaf */
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if (frag->split_by == 0) {
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if (pfrag)
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memcpy(pfrag, frag, sizeof(*pfrag));
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if (found)
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*found = 1;
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break;
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}
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/* choose child */
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nway = 1 << frag->split_by;
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dout("choose_frag(%x) %x splits by %d (%d ways)\n", v, t,
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frag->split_by, nway);
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for (i = 0; i < nway; i++) {
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n = ceph_frag_make_child(t, frag->split_by, i);
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if (ceph_frag_contains_value(n, v)) {
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t = n;
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break;
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}
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}
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BUG_ON(i == nway);
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}
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dout("choose_frag(%x) = %x\n", v, t);
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return t;
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}
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u32 ceph_choose_frag(struct ceph_inode_info *ci, u32 v,
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struct ceph_inode_frag *pfrag, int *found)
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{
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u32 ret;
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mutex_lock(&ci->i_fragtree_mutex);
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ret = __ceph_choose_frag(ci, v, pfrag, found);
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mutex_unlock(&ci->i_fragtree_mutex);
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return ret;
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}
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/*
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* Process dirfrag (delegation) info from the mds. Include leaf
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* fragment in tree ONLY if ndist > 0. Otherwise, only
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* branches/splits are included in i_fragtree)
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*/
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static int ceph_fill_dirfrag(struct inode *inode,
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struct ceph_mds_reply_dirfrag *dirinfo)
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{
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struct ceph_inode_info *ci = ceph_inode(inode);
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struct ceph_inode_frag *frag;
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u32 id = le32_to_cpu(dirinfo->frag);
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int mds = le32_to_cpu(dirinfo->auth);
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int ndist = le32_to_cpu(dirinfo->ndist);
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int diri_auth = -1;
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int i;
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int err = 0;
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spin_lock(&ci->i_ceph_lock);
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if (ci->i_auth_cap)
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diri_auth = ci->i_auth_cap->mds;
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spin_unlock(&ci->i_ceph_lock);
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if (mds == -1) /* CDIR_AUTH_PARENT */
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mds = diri_auth;
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mutex_lock(&ci->i_fragtree_mutex);
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if (ndist == 0 && mds == diri_auth) {
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/* no delegation info needed. */
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frag = __ceph_find_frag(ci, id);
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if (!frag)
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goto out;
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if (frag->split_by == 0) {
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/* tree leaf, remove */
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dout("fill_dirfrag removed %llx.%llx frag %x"
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" (no ref)\n", ceph_vinop(inode), id);
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rb_erase(&frag->node, &ci->i_fragtree);
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kfree(frag);
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} else {
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/* tree branch, keep and clear */
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dout("fill_dirfrag cleared %llx.%llx frag %x"
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" referral\n", ceph_vinop(inode), id);
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frag->mds = -1;
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frag->ndist = 0;
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}
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goto out;
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}
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/* find/add this frag to store mds delegation info */
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frag = __get_or_create_frag(ci, id);
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if (IS_ERR(frag)) {
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/* this is not the end of the world; we can continue
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with bad/inaccurate delegation info */
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pr_err("fill_dirfrag ENOMEM on mds ref %llx.%llx fg %x\n",
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ceph_vinop(inode), le32_to_cpu(dirinfo->frag));
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err = -ENOMEM;
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goto out;
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}
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frag->mds = mds;
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frag->ndist = min_t(u32, ndist, CEPH_MAX_DIRFRAG_REP);
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for (i = 0; i < frag->ndist; i++)
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frag->dist[i] = le32_to_cpu(dirinfo->dist[i]);
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dout("fill_dirfrag %llx.%llx frag %x ndist=%d\n",
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ceph_vinop(inode), frag->frag, frag->ndist);
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out:
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mutex_unlock(&ci->i_fragtree_mutex);
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return err;
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}
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static int frag_tree_split_cmp(const void *l, const void *r)
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{
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struct ceph_frag_tree_split *ls = (struct ceph_frag_tree_split*)l;
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struct ceph_frag_tree_split *rs = (struct ceph_frag_tree_split*)r;
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return ceph_frag_compare(le32_to_cpu(ls->frag),
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le32_to_cpu(rs->frag));
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}
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static bool is_frag_child(u32 f, struct ceph_inode_frag *frag)
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{
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if (!frag)
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return f == ceph_frag_make(0, 0);
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if (ceph_frag_bits(f) != ceph_frag_bits(frag->frag) + frag->split_by)
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return false;
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return ceph_frag_contains_value(frag->frag, ceph_frag_value(f));
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}
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static int ceph_fill_fragtree(struct inode *inode,
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struct ceph_frag_tree_head *fragtree,
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struct ceph_mds_reply_dirfrag *dirinfo)
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{
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struct ceph_inode_info *ci = ceph_inode(inode);
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struct ceph_inode_frag *frag, *prev_frag = NULL;
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struct rb_node *rb_node;
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unsigned i, split_by, nsplits;
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u32 id;
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bool update = false;
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mutex_lock(&ci->i_fragtree_mutex);
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nsplits = le32_to_cpu(fragtree->nsplits);
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if (nsplits != ci->i_fragtree_nsplits) {
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update = true;
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} else if (nsplits) {
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i = prandom_u32() % nsplits;
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id = le32_to_cpu(fragtree->splits[i].frag);
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if (!__ceph_find_frag(ci, id))
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update = true;
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} else if (!RB_EMPTY_ROOT(&ci->i_fragtree)) {
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rb_node = rb_first(&ci->i_fragtree);
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frag = rb_entry(rb_node, struct ceph_inode_frag, node);
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if (frag->frag != ceph_frag_make(0, 0) || rb_next(rb_node))
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update = true;
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}
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if (!update && dirinfo) {
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id = le32_to_cpu(dirinfo->frag);
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if (id != __ceph_choose_frag(ci, id, NULL, NULL))
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update = true;
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}
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if (!update)
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goto out_unlock;
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if (nsplits > 1) {
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sort(fragtree->splits, nsplits, sizeof(fragtree->splits[0]),
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frag_tree_split_cmp, NULL);
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}
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dout("fill_fragtree %llx.%llx\n", ceph_vinop(inode));
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rb_node = rb_first(&ci->i_fragtree);
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for (i = 0; i < nsplits; i++) {
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id = le32_to_cpu(fragtree->splits[i].frag);
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split_by = le32_to_cpu(fragtree->splits[i].by);
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if (split_by == 0 || ceph_frag_bits(id) + split_by > 24) {
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pr_err("fill_fragtree %llx.%llx invalid split %d/%u, "
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"frag %x split by %d\n", ceph_vinop(inode),
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i, nsplits, id, split_by);
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continue;
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}
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frag = NULL;
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while (rb_node) {
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frag = rb_entry(rb_node, struct ceph_inode_frag, node);
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if (ceph_frag_compare(frag->frag, id) >= 0) {
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if (frag->frag != id)
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frag = NULL;
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else
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rb_node = rb_next(rb_node);
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break;
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}
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rb_node = rb_next(rb_node);
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/* delete stale split/leaf node */
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if (frag->split_by > 0 ||
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!is_frag_child(frag->frag, prev_frag)) {
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rb_erase(&frag->node, &ci->i_fragtree);
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if (frag->split_by > 0)
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ci->i_fragtree_nsplits--;
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kfree(frag);
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}
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frag = NULL;
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}
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if (!frag) {
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frag = __get_or_create_frag(ci, id);
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if (IS_ERR(frag))
|
|
continue;
|
|
}
|
|
if (frag->split_by == 0)
|
|
ci->i_fragtree_nsplits++;
|
|
frag->split_by = split_by;
|
|
dout(" frag %x split by %d\n", frag->frag, frag->split_by);
|
|
prev_frag = frag;
|
|
}
|
|
while (rb_node) {
|
|
frag = rb_entry(rb_node, struct ceph_inode_frag, node);
|
|
rb_node = rb_next(rb_node);
|
|
/* delete stale split/leaf node */
|
|
if (frag->split_by > 0 ||
|
|
!is_frag_child(frag->frag, prev_frag)) {
|
|
rb_erase(&frag->node, &ci->i_fragtree);
|
|
if (frag->split_by > 0)
|
|
ci->i_fragtree_nsplits--;
|
|
kfree(frag);
|
|
}
|
|
}
|
|
out_unlock:
|
|
mutex_unlock(&ci->i_fragtree_mutex);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* initialize a newly allocated inode.
|
|
*/
|
|
struct inode *ceph_alloc_inode(struct super_block *sb)
|
|
{
|
|
struct ceph_inode_info *ci;
|
|
int i;
|
|
|
|
ci = kmem_cache_alloc(ceph_inode_cachep, GFP_NOFS);
|
|
if (!ci)
|
|
return NULL;
|
|
|
|
dout("alloc_inode %p\n", &ci->vfs_inode);
|
|
|
|
spin_lock_init(&ci->i_ceph_lock);
|
|
|
|
ci->i_version = 0;
|
|
ci->i_inline_version = 0;
|
|
ci->i_time_warp_seq = 0;
|
|
ci->i_ceph_flags = 0;
|
|
atomic64_set(&ci->i_ordered_count, 1);
|
|
atomic64_set(&ci->i_release_count, 1);
|
|
atomic64_set(&ci->i_complete_seq[0], 0);
|
|
atomic64_set(&ci->i_complete_seq[1], 0);
|
|
ci->i_symlink = NULL;
|
|
|
|
memset(&ci->i_dir_layout, 0, sizeof(ci->i_dir_layout));
|
|
RCU_INIT_POINTER(ci->i_layout.pool_ns, NULL);
|
|
|
|
ci->i_fragtree = RB_ROOT;
|
|
mutex_init(&ci->i_fragtree_mutex);
|
|
|
|
ci->i_xattrs.blob = NULL;
|
|
ci->i_xattrs.prealloc_blob = NULL;
|
|
ci->i_xattrs.dirty = false;
|
|
ci->i_xattrs.index = RB_ROOT;
|
|
ci->i_xattrs.count = 0;
|
|
ci->i_xattrs.names_size = 0;
|
|
ci->i_xattrs.vals_size = 0;
|
|
ci->i_xattrs.version = 0;
|
|
ci->i_xattrs.index_version = 0;
|
|
|
|
ci->i_caps = RB_ROOT;
|
|
ci->i_auth_cap = NULL;
|
|
ci->i_dirty_caps = 0;
|
|
ci->i_flushing_caps = 0;
|
|
INIT_LIST_HEAD(&ci->i_dirty_item);
|
|
INIT_LIST_HEAD(&ci->i_flushing_item);
|
|
ci->i_prealloc_cap_flush = NULL;
|
|
INIT_LIST_HEAD(&ci->i_cap_flush_list);
|
|
init_waitqueue_head(&ci->i_cap_wq);
|
|
ci->i_hold_caps_min = 0;
|
|
ci->i_hold_caps_max = 0;
|
|
INIT_LIST_HEAD(&ci->i_cap_delay_list);
|
|
INIT_LIST_HEAD(&ci->i_cap_snaps);
|
|
ci->i_head_snapc = NULL;
|
|
ci->i_snap_caps = 0;
|
|
|
|
for (i = 0; i < CEPH_FILE_MODE_BITS; i++)
|
|
ci->i_nr_by_mode[i] = 0;
|
|
|
|
mutex_init(&ci->i_truncate_mutex);
|
|
ci->i_truncate_seq = 0;
|
|
ci->i_truncate_size = 0;
|
|
ci->i_truncate_pending = 0;
|
|
|
|
ci->i_max_size = 0;
|
|
ci->i_reported_size = 0;
|
|
ci->i_wanted_max_size = 0;
|
|
ci->i_requested_max_size = 0;
|
|
|
|
ci->i_pin_ref = 0;
|
|
ci->i_rd_ref = 0;
|
|
ci->i_rdcache_ref = 0;
|
|
ci->i_wr_ref = 0;
|
|
ci->i_wb_ref = 0;
|
|
ci->i_wrbuffer_ref = 0;
|
|
ci->i_wrbuffer_ref_head = 0;
|
|
ci->i_shared_gen = 0;
|
|
ci->i_rdcache_gen = 0;
|
|
ci->i_rdcache_revoking = 0;
|
|
|
|
INIT_LIST_HEAD(&ci->i_unsafe_dirops);
|
|
INIT_LIST_HEAD(&ci->i_unsafe_iops);
|
|
spin_lock_init(&ci->i_unsafe_lock);
|
|
|
|
ci->i_snap_realm = NULL;
|
|
INIT_LIST_HEAD(&ci->i_snap_realm_item);
|
|
INIT_LIST_HEAD(&ci->i_snap_flush_item);
|
|
|
|
INIT_WORK(&ci->i_wb_work, ceph_writeback_work);
|
|
INIT_WORK(&ci->i_pg_inv_work, ceph_invalidate_work);
|
|
|
|
INIT_WORK(&ci->i_vmtruncate_work, ceph_vmtruncate_work);
|
|
|
|
ceph_fscache_inode_init(ci);
|
|
|
|
return &ci->vfs_inode;
|
|
}
|
|
|
|
static void ceph_i_callback(struct rcu_head *head)
|
|
{
|
|
struct inode *inode = container_of(head, struct inode, i_rcu);
|
|
struct ceph_inode_info *ci = ceph_inode(inode);
|
|
|
|
kmem_cache_free(ceph_inode_cachep, ci);
|
|
}
|
|
|
|
void ceph_destroy_inode(struct inode *inode)
|
|
{
|
|
struct ceph_inode_info *ci = ceph_inode(inode);
|
|
struct ceph_inode_frag *frag;
|
|
struct rb_node *n;
|
|
|
|
dout("destroy_inode %p ino %llx.%llx\n", inode, ceph_vinop(inode));
|
|
|
|
ceph_fscache_unregister_inode_cookie(ci);
|
|
|
|
ceph_queue_caps_release(inode);
|
|
|
|
/*
|
|
* we may still have a snap_realm reference if there are stray
|
|
* caps in i_snap_caps.
|
|
*/
|
|
if (ci->i_snap_realm) {
|
|
struct ceph_mds_client *mdsc =
|
|
ceph_sb_to_client(ci->vfs_inode.i_sb)->mdsc;
|
|
struct ceph_snap_realm *realm = ci->i_snap_realm;
|
|
|
|
dout(" dropping residual ref to snap realm %p\n", realm);
|
|
spin_lock(&realm->inodes_with_caps_lock);
|
|
list_del_init(&ci->i_snap_realm_item);
|
|
spin_unlock(&realm->inodes_with_caps_lock);
|
|
ceph_put_snap_realm(mdsc, realm);
|
|
}
|
|
|
|
kfree(ci->i_symlink);
|
|
while ((n = rb_first(&ci->i_fragtree)) != NULL) {
|
|
frag = rb_entry(n, struct ceph_inode_frag, node);
|
|
rb_erase(n, &ci->i_fragtree);
|
|
kfree(frag);
|
|
}
|
|
ci->i_fragtree_nsplits = 0;
|
|
|
|
__ceph_destroy_xattrs(ci);
|
|
if (ci->i_xattrs.blob)
|
|
ceph_buffer_put(ci->i_xattrs.blob);
|
|
if (ci->i_xattrs.prealloc_blob)
|
|
ceph_buffer_put(ci->i_xattrs.prealloc_blob);
|
|
|
|
ceph_put_string(rcu_dereference_raw(ci->i_layout.pool_ns));
|
|
|
|
call_rcu(&inode->i_rcu, ceph_i_callback);
|
|
}
|
|
|
|
int ceph_drop_inode(struct inode *inode)
|
|
{
|
|
/*
|
|
* Positve dentry and corresponding inode are always accompanied
|
|
* in MDS reply. So no need to keep inode in the cache after
|
|
* dropping all its aliases.
|
|
*/
|
|
return 1;
|
|
}
|
|
|
|
static inline blkcnt_t calc_inode_blocks(u64 size)
|
|
{
|
|
return (size + (1<<9) - 1) >> 9;
|
|
}
|
|
|
|
/*
|
|
* Helpers to fill in size, ctime, mtime, and atime. We have to be
|
|
* careful because either the client or MDS may have more up to date
|
|
* info, depending on which capabilities are held, and whether
|
|
* time_warp_seq or truncate_seq have increased. (Ordinarily, mtime
|
|
* and size are monotonically increasing, except when utimes() or
|
|
* truncate() increments the corresponding _seq values.)
|
|
*/
|
|
int ceph_fill_file_size(struct inode *inode, int issued,
|
|
u32 truncate_seq, u64 truncate_size, u64 size)
|
|
{
|
|
struct ceph_inode_info *ci = ceph_inode(inode);
|
|
int queue_trunc = 0;
|
|
|
|
if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) > 0 ||
|
|
(truncate_seq == ci->i_truncate_seq && size > inode->i_size)) {
|
|
dout("size %lld -> %llu\n", inode->i_size, size);
|
|
if (size > 0 && S_ISDIR(inode->i_mode)) {
|
|
pr_err("fill_file_size non-zero size for directory\n");
|
|
size = 0;
|
|
}
|
|
i_size_write(inode, size);
|
|
inode->i_blocks = calc_inode_blocks(size);
|
|
ci->i_reported_size = size;
|
|
if (truncate_seq != ci->i_truncate_seq) {
|
|
dout("truncate_seq %u -> %u\n",
|
|
ci->i_truncate_seq, truncate_seq);
|
|
ci->i_truncate_seq = truncate_seq;
|
|
|
|
/* the MDS should have revoked these caps */
|
|
WARN_ON_ONCE(issued & (CEPH_CAP_FILE_EXCL |
|
|
CEPH_CAP_FILE_RD |
|
|
CEPH_CAP_FILE_WR |
|
|
CEPH_CAP_FILE_LAZYIO));
|
|
/*
|
|
* If we hold relevant caps, or in the case where we're
|
|
* not the only client referencing this file and we
|
|
* don't hold those caps, then we need to check whether
|
|
* the file is either opened or mmaped
|
|
*/
|
|
if ((issued & (CEPH_CAP_FILE_CACHE|
|
|
CEPH_CAP_FILE_BUFFER)) ||
|
|
mapping_mapped(inode->i_mapping) ||
|
|
__ceph_caps_file_wanted(ci)) {
|
|
ci->i_truncate_pending++;
|
|
queue_trunc = 1;
|
|
}
|
|
}
|
|
}
|
|
if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) >= 0 &&
|
|
ci->i_truncate_size != truncate_size) {
|
|
dout("truncate_size %lld -> %llu\n", ci->i_truncate_size,
|
|
truncate_size);
|
|
ci->i_truncate_size = truncate_size;
|
|
}
|
|
|
|
if (queue_trunc)
|
|
ceph_fscache_invalidate(inode);
|
|
|
|
return queue_trunc;
|
|
}
|
|
|
|
void ceph_fill_file_time(struct inode *inode, int issued,
|
|
u64 time_warp_seq, struct timespec *ctime,
|
|
struct timespec *mtime, struct timespec *atime)
|
|
{
|
|
struct ceph_inode_info *ci = ceph_inode(inode);
|
|
int warn = 0;
|
|
|
|
if (issued & (CEPH_CAP_FILE_EXCL|
|
|
CEPH_CAP_FILE_WR|
|
|
CEPH_CAP_FILE_BUFFER|
|
|
CEPH_CAP_AUTH_EXCL|
|
|
CEPH_CAP_XATTR_EXCL)) {
|
|
if (timespec_compare(ctime, &inode->i_ctime) > 0) {
|
|
dout("ctime %ld.%09ld -> %ld.%09ld inc w/ cap\n",
|
|
inode->i_ctime.tv_sec, inode->i_ctime.tv_nsec,
|
|
ctime->tv_sec, ctime->tv_nsec);
|
|
inode->i_ctime = *ctime;
|
|
}
|
|
if (ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) > 0) {
|
|
/* the MDS did a utimes() */
|
|
dout("mtime %ld.%09ld -> %ld.%09ld "
|
|
"tw %d -> %d\n",
|
|
inode->i_mtime.tv_sec, inode->i_mtime.tv_nsec,
|
|
mtime->tv_sec, mtime->tv_nsec,
|
|
ci->i_time_warp_seq, (int)time_warp_seq);
|
|
|
|
inode->i_mtime = *mtime;
|
|
inode->i_atime = *atime;
|
|
ci->i_time_warp_seq = time_warp_seq;
|
|
} else if (time_warp_seq == ci->i_time_warp_seq) {
|
|
/* nobody did utimes(); take the max */
|
|
if (timespec_compare(mtime, &inode->i_mtime) > 0) {
|
|
dout("mtime %ld.%09ld -> %ld.%09ld inc\n",
|
|
inode->i_mtime.tv_sec,
|
|
inode->i_mtime.tv_nsec,
|
|
mtime->tv_sec, mtime->tv_nsec);
|
|
inode->i_mtime = *mtime;
|
|
}
|
|
if (timespec_compare(atime, &inode->i_atime) > 0) {
|
|
dout("atime %ld.%09ld -> %ld.%09ld inc\n",
|
|
inode->i_atime.tv_sec,
|
|
inode->i_atime.tv_nsec,
|
|
atime->tv_sec, atime->tv_nsec);
|
|
inode->i_atime = *atime;
|
|
}
|
|
} else if (issued & CEPH_CAP_FILE_EXCL) {
|
|
/* we did a utimes(); ignore mds values */
|
|
} else {
|
|
warn = 1;
|
|
}
|
|
} else {
|
|
/* we have no write|excl caps; whatever the MDS says is true */
|
|
if (ceph_seq_cmp(time_warp_seq, ci->i_time_warp_seq) >= 0) {
|
|
inode->i_ctime = *ctime;
|
|
inode->i_mtime = *mtime;
|
|
inode->i_atime = *atime;
|
|
ci->i_time_warp_seq = time_warp_seq;
|
|
} else {
|
|
warn = 1;
|
|
}
|
|
}
|
|
if (warn) /* time_warp_seq shouldn't go backwards */
|
|
dout("%p mds time_warp_seq %llu < %u\n",
|
|
inode, time_warp_seq, ci->i_time_warp_seq);
|
|
}
|
|
|
|
/*
|
|
* Populate an inode based on info from mds. May be called on new or
|
|
* existing inodes.
|
|
*/
|
|
static int fill_inode(struct inode *inode, struct page *locked_page,
|
|
struct ceph_mds_reply_info_in *iinfo,
|
|
struct ceph_mds_reply_dirfrag *dirinfo,
|
|
struct ceph_mds_session *session,
|
|
unsigned long ttl_from, int cap_fmode,
|
|
struct ceph_cap_reservation *caps_reservation)
|
|
{
|
|
struct ceph_mds_client *mdsc = ceph_inode_to_client(inode)->mdsc;
|
|
struct ceph_mds_reply_inode *info = iinfo->in;
|
|
struct ceph_inode_info *ci = ceph_inode(inode);
|
|
int issued = 0, implemented, new_issued;
|
|
struct timespec mtime, atime, ctime;
|
|
struct ceph_buffer *xattr_blob = NULL;
|
|
struct ceph_string *pool_ns = NULL;
|
|
struct ceph_cap *new_cap = NULL;
|
|
int err = 0;
|
|
bool wake = false;
|
|
bool queue_trunc = false;
|
|
bool new_version = false;
|
|
bool fill_inline = false;
|
|
|
|
dout("fill_inode %p ino %llx.%llx v %llu had %llu\n",
|
|
inode, ceph_vinop(inode), le64_to_cpu(info->version),
|
|
ci->i_version);
|
|
|
|
/* prealloc new cap struct */
|
|
if (info->cap.caps && ceph_snap(inode) == CEPH_NOSNAP)
|
|
new_cap = ceph_get_cap(mdsc, caps_reservation);
|
|
|
|
/*
|
|
* prealloc xattr data, if it looks like we'll need it. only
|
|
* if len > 4 (meaning there are actually xattrs; the first 4
|
|
* bytes are the xattr count).
|
|
*/
|
|
if (iinfo->xattr_len > 4) {
|
|
xattr_blob = ceph_buffer_new(iinfo->xattr_len, GFP_NOFS);
|
|
if (!xattr_blob)
|
|
pr_err("fill_inode ENOMEM xattr blob %d bytes\n",
|
|
iinfo->xattr_len);
|
|
}
|
|
|
|
if (iinfo->pool_ns_len > 0)
|
|
pool_ns = ceph_find_or_create_string(iinfo->pool_ns_data,
|
|
iinfo->pool_ns_len);
|
|
|
|
spin_lock(&ci->i_ceph_lock);
|
|
|
|
/*
|
|
* provided version will be odd if inode value is projected,
|
|
* even if stable. skip the update if we have newer stable
|
|
* info (ours>=theirs, e.g. due to racing mds replies), unless
|
|
* we are getting projected (unstable) info (in which case the
|
|
* version is odd, and we want ours>theirs).
|
|
* us them
|
|
* 2 2 skip
|
|
* 3 2 skip
|
|
* 3 3 update
|
|
*/
|
|
if (ci->i_version == 0 ||
|
|
((info->cap.flags & CEPH_CAP_FLAG_AUTH) &&
|
|
le64_to_cpu(info->version) > (ci->i_version & ~1)))
|
|
new_version = true;
|
|
|
|
issued = __ceph_caps_issued(ci, &implemented);
|
|
issued |= implemented | __ceph_caps_dirty(ci);
|
|
new_issued = ~issued & le32_to_cpu(info->cap.caps);
|
|
|
|
/* update inode */
|
|
ci->i_version = le64_to_cpu(info->version);
|
|
inode->i_version++;
|
|
inode->i_rdev = le32_to_cpu(info->rdev);
|
|
inode->i_blkbits = fls(le32_to_cpu(info->layout.fl_stripe_unit)) - 1;
|
|
|
|
if ((new_version || (new_issued & CEPH_CAP_AUTH_SHARED)) &&
|
|
(issued & CEPH_CAP_AUTH_EXCL) == 0) {
|
|
inode->i_mode = le32_to_cpu(info->mode);
|
|
inode->i_uid = make_kuid(&init_user_ns, le32_to_cpu(info->uid));
|
|
inode->i_gid = make_kgid(&init_user_ns, le32_to_cpu(info->gid));
|
|
dout("%p mode 0%o uid.gid %d.%d\n", inode, inode->i_mode,
|
|
from_kuid(&init_user_ns, inode->i_uid),
|
|
from_kgid(&init_user_ns, inode->i_gid));
|
|
}
|
|
|
|
if ((new_version || (new_issued & CEPH_CAP_LINK_SHARED)) &&
|
|
(issued & CEPH_CAP_LINK_EXCL) == 0)
|
|
set_nlink(inode, le32_to_cpu(info->nlink));
|
|
|
|
if (new_version || (new_issued & CEPH_CAP_ANY_RD)) {
|
|
/* be careful with mtime, atime, size */
|
|
ceph_decode_timespec(&atime, &info->atime);
|
|
ceph_decode_timespec(&mtime, &info->mtime);
|
|
ceph_decode_timespec(&ctime, &info->ctime);
|
|
ceph_fill_file_time(inode, issued,
|
|
le32_to_cpu(info->time_warp_seq),
|
|
&ctime, &mtime, &atime);
|
|
}
|
|
|
|
if (new_version ||
|
|
(new_issued & (CEPH_CAP_ANY_FILE_RD | CEPH_CAP_ANY_FILE_WR))) {
|
|
s64 old_pool = ci->i_layout.pool_id;
|
|
struct ceph_string *old_ns;
|
|
|
|
ceph_file_layout_from_legacy(&ci->i_layout, &info->layout);
|
|
old_ns = rcu_dereference_protected(ci->i_layout.pool_ns,
|
|
lockdep_is_held(&ci->i_ceph_lock));
|
|
rcu_assign_pointer(ci->i_layout.pool_ns, pool_ns);
|
|
|
|
if (ci->i_layout.pool_id != old_pool || pool_ns != old_ns)
|
|
ci->i_ceph_flags &= ~CEPH_I_POOL_PERM;
|
|
|
|
pool_ns = old_ns;
|
|
|
|
queue_trunc = ceph_fill_file_size(inode, issued,
|
|
le32_to_cpu(info->truncate_seq),
|
|
le64_to_cpu(info->truncate_size),
|
|
le64_to_cpu(info->size));
|
|
/* only update max_size on auth cap */
|
|
if ((info->cap.flags & CEPH_CAP_FLAG_AUTH) &&
|
|
ci->i_max_size != le64_to_cpu(info->max_size)) {
|
|
dout("max_size %lld -> %llu\n", ci->i_max_size,
|
|
le64_to_cpu(info->max_size));
|
|
ci->i_max_size = le64_to_cpu(info->max_size);
|
|
}
|
|
}
|
|
|
|
/* xattrs */
|
|
/* note that if i_xattrs.len <= 4, i_xattrs.data will still be NULL. */
|
|
if ((ci->i_xattrs.version == 0 || !(issued & CEPH_CAP_XATTR_EXCL)) &&
|
|
le64_to_cpu(info->xattr_version) > ci->i_xattrs.version) {
|
|
if (ci->i_xattrs.blob)
|
|
ceph_buffer_put(ci->i_xattrs.blob);
|
|
ci->i_xattrs.blob = xattr_blob;
|
|
if (xattr_blob)
|
|
memcpy(ci->i_xattrs.blob->vec.iov_base,
|
|
iinfo->xattr_data, iinfo->xattr_len);
|
|
ci->i_xattrs.version = le64_to_cpu(info->xattr_version);
|
|
ceph_forget_all_cached_acls(inode);
|
|
xattr_blob = NULL;
|
|
}
|
|
|
|
inode->i_mapping->a_ops = &ceph_aops;
|
|
|
|
switch (inode->i_mode & S_IFMT) {
|
|
case S_IFIFO:
|
|
case S_IFBLK:
|
|
case S_IFCHR:
|
|
case S_IFSOCK:
|
|
init_special_inode(inode, inode->i_mode, inode->i_rdev);
|
|
inode->i_op = &ceph_file_iops;
|
|
break;
|
|
case S_IFREG:
|
|
inode->i_op = &ceph_file_iops;
|
|
inode->i_fop = &ceph_file_fops;
|
|
break;
|
|
case S_IFLNK:
|
|
inode->i_op = &ceph_symlink_iops;
|
|
if (!ci->i_symlink) {
|
|
u32 symlen = iinfo->symlink_len;
|
|
char *sym;
|
|
|
|
spin_unlock(&ci->i_ceph_lock);
|
|
|
|
if (symlen != i_size_read(inode)) {
|
|
pr_err("fill_inode %llx.%llx BAD symlink "
|
|
"size %lld\n", ceph_vinop(inode),
|
|
i_size_read(inode));
|
|
i_size_write(inode, symlen);
|
|
inode->i_blocks = calc_inode_blocks(symlen);
|
|
}
|
|
|
|
err = -ENOMEM;
|
|
sym = kstrndup(iinfo->symlink, symlen, GFP_NOFS);
|
|
if (!sym)
|
|
goto out;
|
|
|
|
spin_lock(&ci->i_ceph_lock);
|
|
if (!ci->i_symlink)
|
|
ci->i_symlink = sym;
|
|
else
|
|
kfree(sym); /* lost a race */
|
|
}
|
|
inode->i_link = ci->i_symlink;
|
|
break;
|
|
case S_IFDIR:
|
|
inode->i_op = &ceph_dir_iops;
|
|
inode->i_fop = &ceph_dir_fops;
|
|
|
|
ci->i_dir_layout = iinfo->dir_layout;
|
|
|
|
ci->i_files = le64_to_cpu(info->files);
|
|
ci->i_subdirs = le64_to_cpu(info->subdirs);
|
|
ci->i_rbytes = le64_to_cpu(info->rbytes);
|
|
ci->i_rfiles = le64_to_cpu(info->rfiles);
|
|
ci->i_rsubdirs = le64_to_cpu(info->rsubdirs);
|
|
ceph_decode_timespec(&ci->i_rctime, &info->rctime);
|
|
break;
|
|
default:
|
|
pr_err("fill_inode %llx.%llx BAD mode 0%o\n",
|
|
ceph_vinop(inode), inode->i_mode);
|
|
}
|
|
|
|
/* were we issued a capability? */
|
|
if (info->cap.caps) {
|
|
if (ceph_snap(inode) == CEPH_NOSNAP) {
|
|
unsigned caps = le32_to_cpu(info->cap.caps);
|
|
ceph_add_cap(inode, session,
|
|
le64_to_cpu(info->cap.cap_id),
|
|
cap_fmode, caps,
|
|
le32_to_cpu(info->cap.wanted),
|
|
le32_to_cpu(info->cap.seq),
|
|
le32_to_cpu(info->cap.mseq),
|
|
le64_to_cpu(info->cap.realm),
|
|
info->cap.flags, &new_cap);
|
|
|
|
/* set dir completion flag? */
|
|
if (S_ISDIR(inode->i_mode) &&
|
|
ci->i_files == 0 && ci->i_subdirs == 0 &&
|
|
(caps & CEPH_CAP_FILE_SHARED) &&
|
|
(issued & CEPH_CAP_FILE_EXCL) == 0 &&
|
|
!__ceph_dir_is_complete(ci)) {
|
|
dout(" marking %p complete (empty)\n", inode);
|
|
i_size_write(inode, 0);
|
|
__ceph_dir_set_complete(ci,
|
|
atomic64_read(&ci->i_release_count),
|
|
atomic64_read(&ci->i_ordered_count));
|
|
}
|
|
|
|
wake = true;
|
|
} else {
|
|
dout(" %p got snap_caps %s\n", inode,
|
|
ceph_cap_string(le32_to_cpu(info->cap.caps)));
|
|
ci->i_snap_caps |= le32_to_cpu(info->cap.caps);
|
|
if (cap_fmode >= 0)
|
|
__ceph_get_fmode(ci, cap_fmode);
|
|
}
|
|
} else if (cap_fmode >= 0) {
|
|
pr_warn("mds issued no caps on %llx.%llx\n",
|
|
ceph_vinop(inode));
|
|
__ceph_get_fmode(ci, cap_fmode);
|
|
}
|
|
|
|
if (iinfo->inline_version > 0 &&
|
|
iinfo->inline_version >= ci->i_inline_version) {
|
|
int cache_caps = CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_LAZYIO;
|
|
ci->i_inline_version = iinfo->inline_version;
|
|
if (ci->i_inline_version != CEPH_INLINE_NONE &&
|
|
(locked_page ||
|
|
(le32_to_cpu(info->cap.caps) & cache_caps)))
|
|
fill_inline = true;
|
|
}
|
|
|
|
spin_unlock(&ci->i_ceph_lock);
|
|
|
|
if (fill_inline)
|
|
ceph_fill_inline_data(inode, locked_page,
|
|
iinfo->inline_data, iinfo->inline_len);
|
|
|
|
if (wake)
|
|
wake_up_all(&ci->i_cap_wq);
|
|
|
|
/* queue truncate if we saw i_size decrease */
|
|
if (queue_trunc)
|
|
ceph_queue_vmtruncate(inode);
|
|
|
|
/* populate frag tree */
|
|
if (S_ISDIR(inode->i_mode))
|
|
ceph_fill_fragtree(inode, &info->fragtree, dirinfo);
|
|
|
|
/* update delegation info? */
|
|
if (dirinfo)
|
|
ceph_fill_dirfrag(inode, dirinfo);
|
|
|
|
err = 0;
|
|
out:
|
|
if (new_cap)
|
|
ceph_put_cap(mdsc, new_cap);
|
|
if (xattr_blob)
|
|
ceph_buffer_put(xattr_blob);
|
|
ceph_put_string(pool_ns);
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* caller should hold session s_mutex.
|
|
*/
|
|
static void update_dentry_lease(struct dentry *dentry,
|
|
struct ceph_mds_reply_lease *lease,
|
|
struct ceph_mds_session *session,
|
|
unsigned long from_time,
|
|
struct ceph_vino *tgt_vino,
|
|
struct ceph_vino *dir_vino)
|
|
{
|
|
struct ceph_dentry_info *di = ceph_dentry(dentry);
|
|
long unsigned duration = le32_to_cpu(lease->duration_ms);
|
|
long unsigned ttl = from_time + (duration * HZ) / 1000;
|
|
long unsigned half_ttl = from_time + (duration * HZ / 2) / 1000;
|
|
struct inode *dir;
|
|
struct ceph_mds_session *old_lease_session = NULL;
|
|
|
|
/*
|
|
* Make sure dentry's inode matches tgt_vino. NULL tgt_vino means that
|
|
* we expect a negative dentry.
|
|
*/
|
|
if (!tgt_vino && d_really_is_positive(dentry))
|
|
return;
|
|
|
|
if (tgt_vino && (d_really_is_negative(dentry) ||
|
|
!ceph_ino_compare(d_inode(dentry), tgt_vino)))
|
|
return;
|
|
|
|
spin_lock(&dentry->d_lock);
|
|
dout("update_dentry_lease %p duration %lu ms ttl %lu\n",
|
|
dentry, duration, ttl);
|
|
|
|
dir = d_inode(dentry->d_parent);
|
|
|
|
/* make sure parent matches dir_vino */
|
|
if (!ceph_ino_compare(dir, dir_vino))
|
|
goto out_unlock;
|
|
|
|
/* only track leases on regular dentries */
|
|
if (ceph_snap(dir) != CEPH_NOSNAP)
|
|
goto out_unlock;
|
|
|
|
di->lease_shared_gen = ceph_inode(dir)->i_shared_gen;
|
|
|
|
if (duration == 0)
|
|
goto out_unlock;
|
|
|
|
if (di->lease_gen == session->s_cap_gen &&
|
|
time_before(ttl, di->time))
|
|
goto out_unlock; /* we already have a newer lease. */
|
|
|
|
if (di->lease_session && di->lease_session != session) {
|
|
old_lease_session = di->lease_session;
|
|
di->lease_session = NULL;
|
|
}
|
|
|
|
ceph_dentry_lru_touch(dentry);
|
|
|
|
if (!di->lease_session)
|
|
di->lease_session = ceph_get_mds_session(session);
|
|
di->lease_gen = session->s_cap_gen;
|
|
di->lease_seq = le32_to_cpu(lease->seq);
|
|
di->lease_renew_after = half_ttl;
|
|
di->lease_renew_from = 0;
|
|
di->time = ttl;
|
|
out_unlock:
|
|
spin_unlock(&dentry->d_lock);
|
|
if (old_lease_session)
|
|
ceph_put_mds_session(old_lease_session);
|
|
}
|
|
|
|
/*
|
|
* splice a dentry to an inode.
|
|
* caller must hold directory i_mutex for this to be safe.
|
|
*/
|
|
static struct dentry *splice_dentry(struct dentry *dn, struct inode *in)
|
|
{
|
|
struct dentry *realdn;
|
|
|
|
BUG_ON(d_inode(dn));
|
|
|
|
/* dn must be unhashed */
|
|
if (!d_unhashed(dn))
|
|
d_drop(dn);
|
|
realdn = d_splice_alias(in, dn);
|
|
if (IS_ERR(realdn)) {
|
|
pr_err("splice_dentry error %ld %p inode %p ino %llx.%llx\n",
|
|
PTR_ERR(realdn), dn, in, ceph_vinop(in));
|
|
dn = realdn; /* note realdn contains the error */
|
|
goto out;
|
|
} else if (realdn) {
|
|
dout("dn %p (%d) spliced with %p (%d) "
|
|
"inode %p ino %llx.%llx\n",
|
|
dn, d_count(dn),
|
|
realdn, d_count(realdn),
|
|
d_inode(realdn), ceph_vinop(d_inode(realdn)));
|
|
dput(dn);
|
|
dn = realdn;
|
|
} else {
|
|
BUG_ON(!ceph_dentry(dn));
|
|
dout("dn %p attached to %p ino %llx.%llx\n",
|
|
dn, d_inode(dn), ceph_vinop(d_inode(dn)));
|
|
}
|
|
out:
|
|
return dn;
|
|
}
|
|
|
|
/*
|
|
* Incorporate results into the local cache. This is either just
|
|
* one inode, or a directory, dentry, and possibly linked-to inode (e.g.,
|
|
* after a lookup).
|
|
*
|
|
* A reply may contain
|
|
* a directory inode along with a dentry.
|
|
* and/or a target inode
|
|
*
|
|
* Called with snap_rwsem (read).
|
|
*/
|
|
int ceph_fill_trace(struct super_block *sb, struct ceph_mds_request *req)
|
|
{
|
|
struct ceph_mds_session *session = req->r_session;
|
|
struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info;
|
|
struct inode *in = NULL;
|
|
struct ceph_vino tvino, dvino;
|
|
struct ceph_fs_client *fsc = ceph_sb_to_client(sb);
|
|
int err = 0;
|
|
|
|
dout("fill_trace %p is_dentry %d is_target %d\n", req,
|
|
rinfo->head->is_dentry, rinfo->head->is_target);
|
|
|
|
if (!rinfo->head->is_target && !rinfo->head->is_dentry) {
|
|
dout("fill_trace reply is empty!\n");
|
|
if (rinfo->head->result == 0 && req->r_parent)
|
|
ceph_invalidate_dir_request(req);
|
|
return 0;
|
|
}
|
|
|
|
if (rinfo->head->is_dentry) {
|
|
struct inode *dir = req->r_parent;
|
|
|
|
if (dir) {
|
|
err = fill_inode(dir, NULL,
|
|
&rinfo->diri, rinfo->dirfrag,
|
|
session, req->r_request_started, -1,
|
|
&req->r_caps_reservation);
|
|
if (err < 0)
|
|
goto done;
|
|
} else {
|
|
WARN_ON_ONCE(1);
|
|
}
|
|
|
|
if (dir && req->r_op == CEPH_MDS_OP_LOOKUPNAME) {
|
|
struct qstr dname;
|
|
struct dentry *dn, *parent;
|
|
|
|
BUG_ON(!rinfo->head->is_target);
|
|
BUG_ON(req->r_dentry);
|
|
|
|
parent = d_find_any_alias(dir);
|
|
BUG_ON(!parent);
|
|
|
|
dname.name = rinfo->dname;
|
|
dname.len = rinfo->dname_len;
|
|
dname.hash = full_name_hash(parent, dname.name, dname.len);
|
|
tvino.ino = le64_to_cpu(rinfo->targeti.in->ino);
|
|
tvino.snap = le64_to_cpu(rinfo->targeti.in->snapid);
|
|
retry_lookup:
|
|
dn = d_lookup(parent, &dname);
|
|
dout("d_lookup on parent=%p name=%.*s got %p\n",
|
|
parent, dname.len, dname.name, dn);
|
|
|
|
if (!dn) {
|
|
dn = d_alloc(parent, &dname);
|
|
dout("d_alloc %p '%.*s' = %p\n", parent,
|
|
dname.len, dname.name, dn);
|
|
if (!dn) {
|
|
dput(parent);
|
|
err = -ENOMEM;
|
|
goto done;
|
|
}
|
|
err = 0;
|
|
} else if (d_really_is_positive(dn) &&
|
|
(ceph_ino(d_inode(dn)) != tvino.ino ||
|
|
ceph_snap(d_inode(dn)) != tvino.snap)) {
|
|
dout(" dn %p points to wrong inode %p\n",
|
|
dn, d_inode(dn));
|
|
d_delete(dn);
|
|
dput(dn);
|
|
goto retry_lookup;
|
|
}
|
|
|
|
req->r_dentry = dn;
|
|
dput(parent);
|
|
}
|
|
}
|
|
|
|
if (rinfo->head->is_target) {
|
|
tvino.ino = le64_to_cpu(rinfo->targeti.in->ino);
|
|
tvino.snap = le64_to_cpu(rinfo->targeti.in->snapid);
|
|
|
|
in = ceph_get_inode(sb, tvino);
|
|
if (IS_ERR(in)) {
|
|
err = PTR_ERR(in);
|
|
goto done;
|
|
}
|
|
req->r_target_inode = in;
|
|
|
|
err = fill_inode(in, req->r_locked_page, &rinfo->targeti, NULL,
|
|
session, req->r_request_started,
|
|
(!test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags) &&
|
|
rinfo->head->result == 0) ? req->r_fmode : -1,
|
|
&req->r_caps_reservation);
|
|
if (err < 0) {
|
|
pr_err("fill_inode badness %p %llx.%llx\n",
|
|
in, ceph_vinop(in));
|
|
goto done;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* ignore null lease/binding on snapdir ENOENT, or else we
|
|
* will have trouble splicing in the virtual snapdir later
|
|
*/
|
|
if (rinfo->head->is_dentry &&
|
|
!test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags) &&
|
|
test_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags) &&
|
|
(rinfo->head->is_target || strncmp(req->r_dentry->d_name.name,
|
|
fsc->mount_options->snapdir_name,
|
|
req->r_dentry->d_name.len))) {
|
|
/*
|
|
* lookup link rename : null -> possibly existing inode
|
|
* mknod symlink mkdir : null -> new inode
|
|
* unlink : linked -> null
|
|
*/
|
|
struct inode *dir = req->r_parent;
|
|
struct dentry *dn = req->r_dentry;
|
|
bool have_dir_cap, have_lease;
|
|
|
|
BUG_ON(!dn);
|
|
BUG_ON(!dir);
|
|
BUG_ON(d_inode(dn->d_parent) != dir);
|
|
|
|
dvino.ino = le64_to_cpu(rinfo->diri.in->ino);
|
|
dvino.snap = le64_to_cpu(rinfo->diri.in->snapid);
|
|
|
|
BUG_ON(ceph_ino(dir) != dvino.ino);
|
|
BUG_ON(ceph_snap(dir) != dvino.snap);
|
|
|
|
/* do we have a lease on the whole dir? */
|
|
have_dir_cap =
|
|
(le32_to_cpu(rinfo->diri.in->cap.caps) &
|
|
CEPH_CAP_FILE_SHARED);
|
|
|
|
/* do we have a dn lease? */
|
|
have_lease = have_dir_cap ||
|
|
le32_to_cpu(rinfo->dlease->duration_ms);
|
|
if (!have_lease)
|
|
dout("fill_trace no dentry lease or dir cap\n");
|
|
|
|
/* rename? */
|
|
if (req->r_old_dentry && req->r_op == CEPH_MDS_OP_RENAME) {
|
|
struct inode *olddir = req->r_old_dentry_dir;
|
|
BUG_ON(!olddir);
|
|
|
|
dout(" src %p '%pd' dst %p '%pd'\n",
|
|
req->r_old_dentry,
|
|
req->r_old_dentry,
|
|
dn, dn);
|
|
dout("fill_trace doing d_move %p -> %p\n",
|
|
req->r_old_dentry, dn);
|
|
|
|
/* d_move screws up sibling dentries' offsets */
|
|
ceph_dir_clear_ordered(dir);
|
|
ceph_dir_clear_ordered(olddir);
|
|
|
|
d_move(req->r_old_dentry, dn);
|
|
dout(" src %p '%pd' dst %p '%pd'\n",
|
|
req->r_old_dentry,
|
|
req->r_old_dentry,
|
|
dn, dn);
|
|
|
|
/* ensure target dentry is invalidated, despite
|
|
rehashing bug in vfs_rename_dir */
|
|
ceph_invalidate_dentry_lease(dn);
|
|
|
|
dout("dn %p gets new offset %lld\n", req->r_old_dentry,
|
|
ceph_dentry(req->r_old_dentry)->offset);
|
|
|
|
dn = req->r_old_dentry; /* use old_dentry */
|
|
}
|
|
|
|
/* null dentry? */
|
|
if (!rinfo->head->is_target) {
|
|
dout("fill_trace null dentry\n");
|
|
if (d_really_is_positive(dn)) {
|
|
ceph_dir_clear_ordered(dir);
|
|
dout("d_delete %p\n", dn);
|
|
d_delete(dn);
|
|
} else if (have_lease) {
|
|
if (d_unhashed(dn))
|
|
d_add(dn, NULL);
|
|
update_dentry_lease(dn, rinfo->dlease,
|
|
session,
|
|
req->r_request_started,
|
|
NULL, &dvino);
|
|
}
|
|
goto done;
|
|
}
|
|
|
|
/* attach proper inode */
|
|
if (d_really_is_negative(dn)) {
|
|
ceph_dir_clear_ordered(dir);
|
|
ihold(in);
|
|
dn = splice_dentry(dn, in);
|
|
if (IS_ERR(dn)) {
|
|
err = PTR_ERR(dn);
|
|
goto done;
|
|
}
|
|
req->r_dentry = dn; /* may have spliced */
|
|
} else if (d_really_is_positive(dn) && d_inode(dn) != in) {
|
|
dout(" %p links to %p %llx.%llx, not %llx.%llx\n",
|
|
dn, d_inode(dn), ceph_vinop(d_inode(dn)),
|
|
ceph_vinop(in));
|
|
d_invalidate(dn);
|
|
have_lease = false;
|
|
}
|
|
|
|
if (have_lease) {
|
|
tvino.ino = le64_to_cpu(rinfo->targeti.in->ino);
|
|
tvino.snap = le64_to_cpu(rinfo->targeti.in->snapid);
|
|
update_dentry_lease(dn, rinfo->dlease, session,
|
|
req->r_request_started,
|
|
&tvino, &dvino);
|
|
}
|
|
dout(" final dn %p\n", dn);
|
|
} else if ((req->r_op == CEPH_MDS_OP_LOOKUPSNAP ||
|
|
req->r_op == CEPH_MDS_OP_MKSNAP) &&
|
|
!test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags)) {
|
|
struct dentry *dn = req->r_dentry;
|
|
struct inode *dir = req->r_parent;
|
|
|
|
/* fill out a snapdir LOOKUPSNAP dentry */
|
|
BUG_ON(!dn);
|
|
BUG_ON(!dir);
|
|
BUG_ON(ceph_snap(dir) != CEPH_SNAPDIR);
|
|
dout(" linking snapped dir %p to dn %p\n", in, dn);
|
|
ceph_dir_clear_ordered(dir);
|
|
ihold(in);
|
|
dn = splice_dentry(dn, in);
|
|
if (IS_ERR(dn)) {
|
|
err = PTR_ERR(dn);
|
|
goto done;
|
|
}
|
|
req->r_dentry = dn; /* may have spliced */
|
|
} else if (rinfo->head->is_dentry) {
|
|
struct ceph_vino *ptvino = NULL;
|
|
|
|
if ((le32_to_cpu(rinfo->diri.in->cap.caps) & CEPH_CAP_FILE_SHARED) ||
|
|
le32_to_cpu(rinfo->dlease->duration_ms)) {
|
|
dvino.ino = le64_to_cpu(rinfo->diri.in->ino);
|
|
dvino.snap = le64_to_cpu(rinfo->diri.in->snapid);
|
|
|
|
if (rinfo->head->is_target) {
|
|
tvino.ino = le64_to_cpu(rinfo->targeti.in->ino);
|
|
tvino.snap = le64_to_cpu(rinfo->targeti.in->snapid);
|
|
ptvino = &tvino;
|
|
}
|
|
|
|
update_dentry_lease(req->r_dentry, rinfo->dlease,
|
|
session, req->r_request_started, ptvino,
|
|
&dvino);
|
|
} else {
|
|
dout("%s: no dentry lease or dir cap\n", __func__);
|
|
}
|
|
}
|
|
done:
|
|
dout("fill_trace done err=%d\n", err);
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* Prepopulate our cache with readdir results, leases, etc.
|
|
*/
|
|
static int readdir_prepopulate_inodes_only(struct ceph_mds_request *req,
|
|
struct ceph_mds_session *session)
|
|
{
|
|
struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info;
|
|
int i, err = 0;
|
|
|
|
for (i = 0; i < rinfo->dir_nr; i++) {
|
|
struct ceph_mds_reply_dir_entry *rde = rinfo->dir_entries + i;
|
|
struct ceph_vino vino;
|
|
struct inode *in;
|
|
int rc;
|
|
|
|
vino.ino = le64_to_cpu(rde->inode.in->ino);
|
|
vino.snap = le64_to_cpu(rde->inode.in->snapid);
|
|
|
|
in = ceph_get_inode(req->r_dentry->d_sb, vino);
|
|
if (IS_ERR(in)) {
|
|
err = PTR_ERR(in);
|
|
dout("new_inode badness got %d\n", err);
|
|
continue;
|
|
}
|
|
rc = fill_inode(in, NULL, &rde->inode, NULL, session,
|
|
req->r_request_started, -1,
|
|
&req->r_caps_reservation);
|
|
if (rc < 0) {
|
|
pr_err("fill_inode badness on %p got %d\n", in, rc);
|
|
err = rc;
|
|
}
|
|
iput(in);
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
void ceph_readdir_cache_release(struct ceph_readdir_cache_control *ctl)
|
|
{
|
|
if (ctl->page) {
|
|
kunmap(ctl->page);
|
|
put_page(ctl->page);
|
|
ctl->page = NULL;
|
|
}
|
|
}
|
|
|
|
static int fill_readdir_cache(struct inode *dir, struct dentry *dn,
|
|
struct ceph_readdir_cache_control *ctl,
|
|
struct ceph_mds_request *req)
|
|
{
|
|
struct ceph_inode_info *ci = ceph_inode(dir);
|
|
unsigned nsize = PAGE_SIZE / sizeof(struct dentry*);
|
|
unsigned idx = ctl->index % nsize;
|
|
pgoff_t pgoff = ctl->index / nsize;
|
|
|
|
if (!ctl->page || pgoff != page_index(ctl->page)) {
|
|
ceph_readdir_cache_release(ctl);
|
|
if (idx == 0)
|
|
ctl->page = grab_cache_page(&dir->i_data, pgoff);
|
|
else
|
|
ctl->page = find_lock_page(&dir->i_data, pgoff);
|
|
if (!ctl->page) {
|
|
ctl->index = -1;
|
|
return idx == 0 ? -ENOMEM : 0;
|
|
}
|
|
/* reading/filling the cache are serialized by
|
|
* i_mutex, no need to use page lock */
|
|
unlock_page(ctl->page);
|
|
ctl->dentries = kmap(ctl->page);
|
|
if (idx == 0)
|
|
memset(ctl->dentries, 0, PAGE_SIZE);
|
|
}
|
|
|
|
if (req->r_dir_release_cnt == atomic64_read(&ci->i_release_count) &&
|
|
req->r_dir_ordered_cnt == atomic64_read(&ci->i_ordered_count)) {
|
|
dout("readdir cache dn %p idx %d\n", dn, ctl->index);
|
|
ctl->dentries[idx] = dn;
|
|
ctl->index++;
|
|
} else {
|
|
dout("disable readdir cache\n");
|
|
ctl->index = -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int ceph_readdir_prepopulate(struct ceph_mds_request *req,
|
|
struct ceph_mds_session *session)
|
|
{
|
|
struct dentry *parent = req->r_dentry;
|
|
struct ceph_inode_info *ci = ceph_inode(d_inode(parent));
|
|
struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info;
|
|
struct qstr dname;
|
|
struct dentry *dn;
|
|
struct inode *in;
|
|
int err = 0, skipped = 0, ret, i;
|
|
struct ceph_mds_request_head *rhead = req->r_request->front.iov_base;
|
|
u32 frag = le32_to_cpu(rhead->args.readdir.frag);
|
|
u32 last_hash = 0;
|
|
u32 fpos_offset;
|
|
struct ceph_readdir_cache_control cache_ctl = {};
|
|
|
|
if (test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags))
|
|
return readdir_prepopulate_inodes_only(req, session);
|
|
|
|
if (rinfo->hash_order) {
|
|
if (req->r_path2) {
|
|
last_hash = ceph_str_hash(ci->i_dir_layout.dl_dir_hash,
|
|
req->r_path2,
|
|
strlen(req->r_path2));
|
|
last_hash = ceph_frag_value(last_hash);
|
|
} else if (rinfo->offset_hash) {
|
|
/* mds understands offset_hash */
|
|
WARN_ON_ONCE(req->r_readdir_offset != 2);
|
|
last_hash = le32_to_cpu(rhead->args.readdir.offset_hash);
|
|
}
|
|
}
|
|
|
|
if (rinfo->dir_dir &&
|
|
le32_to_cpu(rinfo->dir_dir->frag) != frag) {
|
|
dout("readdir_prepopulate got new frag %x -> %x\n",
|
|
frag, le32_to_cpu(rinfo->dir_dir->frag));
|
|
frag = le32_to_cpu(rinfo->dir_dir->frag);
|
|
if (!rinfo->hash_order)
|
|
req->r_readdir_offset = 2;
|
|
}
|
|
|
|
if (le32_to_cpu(rinfo->head->op) == CEPH_MDS_OP_LSSNAP) {
|
|
dout("readdir_prepopulate %d items under SNAPDIR dn %p\n",
|
|
rinfo->dir_nr, parent);
|
|
} else {
|
|
dout("readdir_prepopulate %d items under dn %p\n",
|
|
rinfo->dir_nr, parent);
|
|
if (rinfo->dir_dir)
|
|
ceph_fill_dirfrag(d_inode(parent), rinfo->dir_dir);
|
|
|
|
if (ceph_frag_is_leftmost(frag) &&
|
|
req->r_readdir_offset == 2 &&
|
|
!(rinfo->hash_order && last_hash)) {
|
|
/* note dir version at start of readdir so we can
|
|
* tell if any dentries get dropped */
|
|
req->r_dir_release_cnt =
|
|
atomic64_read(&ci->i_release_count);
|
|
req->r_dir_ordered_cnt =
|
|
atomic64_read(&ci->i_ordered_count);
|
|
req->r_readdir_cache_idx = 0;
|
|
}
|
|
}
|
|
|
|
cache_ctl.index = req->r_readdir_cache_idx;
|
|
fpos_offset = req->r_readdir_offset;
|
|
|
|
/* FIXME: release caps/leases if error occurs */
|
|
for (i = 0; i < rinfo->dir_nr; i++) {
|
|
struct ceph_mds_reply_dir_entry *rde = rinfo->dir_entries + i;
|
|
struct ceph_vino tvino, dvino;
|
|
|
|
dname.name = rde->name;
|
|
dname.len = rde->name_len;
|
|
dname.hash = full_name_hash(parent, dname.name, dname.len);
|
|
|
|
tvino.ino = le64_to_cpu(rde->inode.in->ino);
|
|
tvino.snap = le64_to_cpu(rde->inode.in->snapid);
|
|
|
|
if (rinfo->hash_order) {
|
|
u32 hash = ceph_str_hash(ci->i_dir_layout.dl_dir_hash,
|
|
rde->name, rde->name_len);
|
|
hash = ceph_frag_value(hash);
|
|
if (hash != last_hash)
|
|
fpos_offset = 2;
|
|
last_hash = hash;
|
|
rde->offset = ceph_make_fpos(hash, fpos_offset++, true);
|
|
} else {
|
|
rde->offset = ceph_make_fpos(frag, fpos_offset++, false);
|
|
}
|
|
|
|
retry_lookup:
|
|
dn = d_lookup(parent, &dname);
|
|
dout("d_lookup on parent=%p name=%.*s got %p\n",
|
|
parent, dname.len, dname.name, dn);
|
|
|
|
if (!dn) {
|
|
dn = d_alloc(parent, &dname);
|
|
dout("d_alloc %p '%.*s' = %p\n", parent,
|
|
dname.len, dname.name, dn);
|
|
if (!dn) {
|
|
dout("d_alloc badness\n");
|
|
err = -ENOMEM;
|
|
goto out;
|
|
}
|
|
} else if (d_really_is_positive(dn) &&
|
|
(ceph_ino(d_inode(dn)) != tvino.ino ||
|
|
ceph_snap(d_inode(dn)) != tvino.snap)) {
|
|
dout(" dn %p points to wrong inode %p\n",
|
|
dn, d_inode(dn));
|
|
d_delete(dn);
|
|
dput(dn);
|
|
goto retry_lookup;
|
|
}
|
|
|
|
/* inode */
|
|
if (d_really_is_positive(dn)) {
|
|
in = d_inode(dn);
|
|
} else {
|
|
in = ceph_get_inode(parent->d_sb, tvino);
|
|
if (IS_ERR(in)) {
|
|
dout("new_inode badness\n");
|
|
d_drop(dn);
|
|
dput(dn);
|
|
err = PTR_ERR(in);
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
ret = fill_inode(in, NULL, &rde->inode, NULL, session,
|
|
req->r_request_started, -1,
|
|
&req->r_caps_reservation);
|
|
if (ret < 0) {
|
|
pr_err("fill_inode badness on %p\n", in);
|
|
if (d_really_is_negative(dn))
|
|
iput(in);
|
|
d_drop(dn);
|
|
err = ret;
|
|
goto next_item;
|
|
}
|
|
|
|
if (d_really_is_negative(dn)) {
|
|
struct dentry *realdn;
|
|
|
|
if (ceph_security_xattr_deadlock(in)) {
|
|
dout(" skip splicing dn %p to inode %p"
|
|
" (security xattr deadlock)\n", dn, in);
|
|
iput(in);
|
|
skipped++;
|
|
goto next_item;
|
|
}
|
|
|
|
realdn = splice_dentry(dn, in);
|
|
if (IS_ERR(realdn)) {
|
|
err = PTR_ERR(realdn);
|
|
d_drop(dn);
|
|
dn = NULL;
|
|
goto next_item;
|
|
}
|
|
dn = realdn;
|
|
}
|
|
|
|
ceph_dentry(dn)->offset = rde->offset;
|
|
|
|
dvino = ceph_vino(d_inode(parent));
|
|
update_dentry_lease(dn, rde->lease, req->r_session,
|
|
req->r_request_started, &tvino, &dvino);
|
|
|
|
if (err == 0 && skipped == 0 && cache_ctl.index >= 0) {
|
|
ret = fill_readdir_cache(d_inode(parent), dn,
|
|
&cache_ctl, req);
|
|
if (ret < 0)
|
|
err = ret;
|
|
}
|
|
next_item:
|
|
if (dn)
|
|
dput(dn);
|
|
}
|
|
out:
|
|
if (err == 0 && skipped == 0) {
|
|
set_bit(CEPH_MDS_R_DID_PREPOPULATE, &req->r_req_flags);
|
|
req->r_readdir_cache_idx = cache_ctl.index;
|
|
}
|
|
ceph_readdir_cache_release(&cache_ctl);
|
|
dout("readdir_prepopulate done\n");
|
|
return err;
|
|
}
|
|
|
|
bool ceph_inode_set_size(struct inode *inode, loff_t size)
|
|
{
|
|
struct ceph_inode_info *ci = ceph_inode(inode);
|
|
bool ret;
|
|
|
|
spin_lock(&ci->i_ceph_lock);
|
|
dout("set_size %p %llu -> %llu\n", inode, inode->i_size, size);
|
|
i_size_write(inode, size);
|
|
inode->i_blocks = calc_inode_blocks(size);
|
|
|
|
ret = __ceph_should_report_size(ci);
|
|
|
|
spin_unlock(&ci->i_ceph_lock);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Write back inode data in a worker thread. (This can't be done
|
|
* in the message handler context.)
|
|
*/
|
|
void ceph_queue_writeback(struct inode *inode)
|
|
{
|
|
ihold(inode);
|
|
if (queue_work(ceph_inode_to_client(inode)->wb_wq,
|
|
&ceph_inode(inode)->i_wb_work)) {
|
|
dout("ceph_queue_writeback %p\n", inode);
|
|
} else {
|
|
dout("ceph_queue_writeback %p failed\n", inode);
|
|
iput(inode);
|
|
}
|
|
}
|
|
|
|
static void ceph_writeback_work(struct work_struct *work)
|
|
{
|
|
struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info,
|
|
i_wb_work);
|
|
struct inode *inode = &ci->vfs_inode;
|
|
|
|
dout("writeback %p\n", inode);
|
|
filemap_fdatawrite(&inode->i_data);
|
|
iput(inode);
|
|
}
|
|
|
|
/*
|
|
* queue an async invalidation
|
|
*/
|
|
void ceph_queue_invalidate(struct inode *inode)
|
|
{
|
|
ihold(inode);
|
|
if (queue_work(ceph_inode_to_client(inode)->pg_inv_wq,
|
|
&ceph_inode(inode)->i_pg_inv_work)) {
|
|
dout("ceph_queue_invalidate %p\n", inode);
|
|
} else {
|
|
dout("ceph_queue_invalidate %p failed\n", inode);
|
|
iput(inode);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Invalidate inode pages in a worker thread. (This can't be done
|
|
* in the message handler context.)
|
|
*/
|
|
static void ceph_invalidate_work(struct work_struct *work)
|
|
{
|
|
struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info,
|
|
i_pg_inv_work);
|
|
struct inode *inode = &ci->vfs_inode;
|
|
struct ceph_fs_client *fsc = ceph_inode_to_client(inode);
|
|
u32 orig_gen;
|
|
int check = 0;
|
|
|
|
mutex_lock(&ci->i_truncate_mutex);
|
|
|
|
if (READ_ONCE(fsc->mount_state) == CEPH_MOUNT_SHUTDOWN) {
|
|
pr_warn_ratelimited("invalidate_pages %p %lld forced umount\n",
|
|
inode, ceph_ino(inode));
|
|
mapping_set_error(inode->i_mapping, -EIO);
|
|
truncate_pagecache(inode, 0);
|
|
mutex_unlock(&ci->i_truncate_mutex);
|
|
goto out;
|
|
}
|
|
|
|
spin_lock(&ci->i_ceph_lock);
|
|
dout("invalidate_pages %p gen %d revoking %d\n", inode,
|
|
ci->i_rdcache_gen, ci->i_rdcache_revoking);
|
|
if (ci->i_rdcache_revoking != ci->i_rdcache_gen) {
|
|
if (__ceph_caps_revoking_other(ci, NULL, CEPH_CAP_FILE_CACHE))
|
|
check = 1;
|
|
spin_unlock(&ci->i_ceph_lock);
|
|
mutex_unlock(&ci->i_truncate_mutex);
|
|
goto out;
|
|
}
|
|
orig_gen = ci->i_rdcache_gen;
|
|
spin_unlock(&ci->i_ceph_lock);
|
|
|
|
if (invalidate_inode_pages2(inode->i_mapping) < 0) {
|
|
pr_err("invalidate_pages %p fails\n", inode);
|
|
}
|
|
|
|
spin_lock(&ci->i_ceph_lock);
|
|
if (orig_gen == ci->i_rdcache_gen &&
|
|
orig_gen == ci->i_rdcache_revoking) {
|
|
dout("invalidate_pages %p gen %d successful\n", inode,
|
|
ci->i_rdcache_gen);
|
|
ci->i_rdcache_revoking--;
|
|
check = 1;
|
|
} else {
|
|
dout("invalidate_pages %p gen %d raced, now %d revoking %d\n",
|
|
inode, orig_gen, ci->i_rdcache_gen,
|
|
ci->i_rdcache_revoking);
|
|
if (__ceph_caps_revoking_other(ci, NULL, CEPH_CAP_FILE_CACHE))
|
|
check = 1;
|
|
}
|
|
spin_unlock(&ci->i_ceph_lock);
|
|
mutex_unlock(&ci->i_truncate_mutex);
|
|
out:
|
|
if (check)
|
|
ceph_check_caps(ci, 0, NULL);
|
|
iput(inode);
|
|
}
|
|
|
|
|
|
/*
|
|
* called by trunc_wq;
|
|
*
|
|
* We also truncate in a separate thread as well.
|
|
*/
|
|
static void ceph_vmtruncate_work(struct work_struct *work)
|
|
{
|
|
struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info,
|
|
i_vmtruncate_work);
|
|
struct inode *inode = &ci->vfs_inode;
|
|
|
|
dout("vmtruncate_work %p\n", inode);
|
|
__ceph_do_pending_vmtruncate(inode);
|
|
iput(inode);
|
|
}
|
|
|
|
/*
|
|
* Queue an async vmtruncate. If we fail to queue work, we will handle
|
|
* the truncation the next time we call __ceph_do_pending_vmtruncate.
|
|
*/
|
|
void ceph_queue_vmtruncate(struct inode *inode)
|
|
{
|
|
struct ceph_inode_info *ci = ceph_inode(inode);
|
|
|
|
ihold(inode);
|
|
|
|
if (queue_work(ceph_sb_to_client(inode->i_sb)->trunc_wq,
|
|
&ci->i_vmtruncate_work)) {
|
|
dout("ceph_queue_vmtruncate %p\n", inode);
|
|
} else {
|
|
dout("ceph_queue_vmtruncate %p failed, pending=%d\n",
|
|
inode, ci->i_truncate_pending);
|
|
iput(inode);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Make sure any pending truncation is applied before doing anything
|
|
* that may depend on it.
|
|
*/
|
|
void __ceph_do_pending_vmtruncate(struct inode *inode)
|
|
{
|
|
struct ceph_inode_info *ci = ceph_inode(inode);
|
|
u64 to;
|
|
int wrbuffer_refs, finish = 0;
|
|
|
|
mutex_lock(&ci->i_truncate_mutex);
|
|
retry:
|
|
spin_lock(&ci->i_ceph_lock);
|
|
if (ci->i_truncate_pending == 0) {
|
|
dout("__do_pending_vmtruncate %p none pending\n", inode);
|
|
spin_unlock(&ci->i_ceph_lock);
|
|
mutex_unlock(&ci->i_truncate_mutex);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* make sure any dirty snapped pages are flushed before we
|
|
* possibly truncate them.. so write AND block!
|
|
*/
|
|
if (ci->i_wrbuffer_ref_head < ci->i_wrbuffer_ref) {
|
|
struct ceph_cap_snap *capsnap;
|
|
to = ci->i_truncate_size;
|
|
list_for_each_entry(capsnap, &ci->i_cap_snaps, ci_item) {
|
|
// MDS should have revoked Frw caps
|
|
WARN_ON_ONCE(capsnap->writing);
|
|
if (capsnap->dirty_pages && capsnap->size > to)
|
|
to = capsnap->size;
|
|
}
|
|
spin_unlock(&ci->i_ceph_lock);
|
|
dout("__do_pending_vmtruncate %p flushing snaps first\n",
|
|
inode);
|
|
|
|
truncate_pagecache(inode, to);
|
|
|
|
filemap_write_and_wait_range(&inode->i_data, 0,
|
|
inode->i_sb->s_maxbytes);
|
|
goto retry;
|
|
}
|
|
|
|
/* there should be no reader or writer */
|
|
WARN_ON_ONCE(ci->i_rd_ref || ci->i_wr_ref);
|
|
|
|
to = ci->i_truncate_size;
|
|
wrbuffer_refs = ci->i_wrbuffer_ref;
|
|
dout("__do_pending_vmtruncate %p (%d) to %lld\n", inode,
|
|
ci->i_truncate_pending, to);
|
|
spin_unlock(&ci->i_ceph_lock);
|
|
|
|
truncate_pagecache(inode, to);
|
|
|
|
spin_lock(&ci->i_ceph_lock);
|
|
if (to == ci->i_truncate_size) {
|
|
ci->i_truncate_pending = 0;
|
|
finish = 1;
|
|
}
|
|
spin_unlock(&ci->i_ceph_lock);
|
|
if (!finish)
|
|
goto retry;
|
|
|
|
mutex_unlock(&ci->i_truncate_mutex);
|
|
|
|
if (wrbuffer_refs == 0)
|
|
ceph_check_caps(ci, CHECK_CAPS_AUTHONLY, NULL);
|
|
|
|
wake_up_all(&ci->i_cap_wq);
|
|
}
|
|
|
|
/*
|
|
* symlinks
|
|
*/
|
|
static const struct inode_operations ceph_symlink_iops = {
|
|
.get_link = simple_get_link,
|
|
.setattr = ceph_setattr,
|
|
.getattr = ceph_getattr,
|
|
.listxattr = ceph_listxattr,
|
|
};
|
|
|
|
int __ceph_setattr(struct inode *inode, struct iattr *attr)
|
|
{
|
|
struct ceph_inode_info *ci = ceph_inode(inode);
|
|
const unsigned int ia_valid = attr->ia_valid;
|
|
struct ceph_mds_request *req;
|
|
struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc;
|
|
struct ceph_cap_flush *prealloc_cf;
|
|
int issued;
|
|
int release = 0, dirtied = 0;
|
|
int mask = 0;
|
|
int err = 0;
|
|
int inode_dirty_flags = 0;
|
|
bool lock_snap_rwsem = false;
|
|
|
|
prealloc_cf = ceph_alloc_cap_flush();
|
|
if (!prealloc_cf)
|
|
return -ENOMEM;
|
|
|
|
req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETATTR,
|
|
USE_AUTH_MDS);
|
|
if (IS_ERR(req)) {
|
|
ceph_free_cap_flush(prealloc_cf);
|
|
return PTR_ERR(req);
|
|
}
|
|
|
|
spin_lock(&ci->i_ceph_lock);
|
|
issued = __ceph_caps_issued(ci, NULL);
|
|
|
|
if (!ci->i_head_snapc &&
|
|
(issued & (CEPH_CAP_ANY_EXCL | CEPH_CAP_FILE_WR))) {
|
|
lock_snap_rwsem = true;
|
|
if (!down_read_trylock(&mdsc->snap_rwsem)) {
|
|
spin_unlock(&ci->i_ceph_lock);
|
|
down_read(&mdsc->snap_rwsem);
|
|
spin_lock(&ci->i_ceph_lock);
|
|
issued = __ceph_caps_issued(ci, NULL);
|
|
}
|
|
}
|
|
|
|
dout("setattr %p issued %s\n", inode, ceph_cap_string(issued));
|
|
|
|
if (ia_valid & ATTR_UID) {
|
|
dout("setattr %p uid %d -> %d\n", inode,
|
|
from_kuid(&init_user_ns, inode->i_uid),
|
|
from_kuid(&init_user_ns, attr->ia_uid));
|
|
if (issued & CEPH_CAP_AUTH_EXCL) {
|
|
inode->i_uid = attr->ia_uid;
|
|
dirtied |= CEPH_CAP_AUTH_EXCL;
|
|
} else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 ||
|
|
!uid_eq(attr->ia_uid, inode->i_uid)) {
|
|
req->r_args.setattr.uid = cpu_to_le32(
|
|
from_kuid(&init_user_ns, attr->ia_uid));
|
|
mask |= CEPH_SETATTR_UID;
|
|
release |= CEPH_CAP_AUTH_SHARED;
|
|
}
|
|
}
|
|
if (ia_valid & ATTR_GID) {
|
|
dout("setattr %p gid %d -> %d\n", inode,
|
|
from_kgid(&init_user_ns, inode->i_gid),
|
|
from_kgid(&init_user_ns, attr->ia_gid));
|
|
if (issued & CEPH_CAP_AUTH_EXCL) {
|
|
inode->i_gid = attr->ia_gid;
|
|
dirtied |= CEPH_CAP_AUTH_EXCL;
|
|
} else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 ||
|
|
!gid_eq(attr->ia_gid, inode->i_gid)) {
|
|
req->r_args.setattr.gid = cpu_to_le32(
|
|
from_kgid(&init_user_ns, attr->ia_gid));
|
|
mask |= CEPH_SETATTR_GID;
|
|
release |= CEPH_CAP_AUTH_SHARED;
|
|
}
|
|
}
|
|
if (ia_valid & ATTR_MODE) {
|
|
dout("setattr %p mode 0%o -> 0%o\n", inode, inode->i_mode,
|
|
attr->ia_mode);
|
|
if (issued & CEPH_CAP_AUTH_EXCL) {
|
|
inode->i_mode = attr->ia_mode;
|
|
dirtied |= CEPH_CAP_AUTH_EXCL;
|
|
} else if ((issued & CEPH_CAP_AUTH_SHARED) == 0 ||
|
|
attr->ia_mode != inode->i_mode) {
|
|
inode->i_mode = attr->ia_mode;
|
|
req->r_args.setattr.mode = cpu_to_le32(attr->ia_mode);
|
|
mask |= CEPH_SETATTR_MODE;
|
|
release |= CEPH_CAP_AUTH_SHARED;
|
|
}
|
|
}
|
|
|
|
if (ia_valid & ATTR_ATIME) {
|
|
dout("setattr %p atime %ld.%ld -> %ld.%ld\n", inode,
|
|
inode->i_atime.tv_sec, inode->i_atime.tv_nsec,
|
|
attr->ia_atime.tv_sec, attr->ia_atime.tv_nsec);
|
|
if (issued & CEPH_CAP_FILE_EXCL) {
|
|
ci->i_time_warp_seq++;
|
|
inode->i_atime = attr->ia_atime;
|
|
dirtied |= CEPH_CAP_FILE_EXCL;
|
|
} else if ((issued & CEPH_CAP_FILE_WR) &&
|
|
timespec_compare(&inode->i_atime,
|
|
&attr->ia_atime) < 0) {
|
|
inode->i_atime = attr->ia_atime;
|
|
dirtied |= CEPH_CAP_FILE_WR;
|
|
} else if ((issued & CEPH_CAP_FILE_SHARED) == 0 ||
|
|
!timespec_equal(&inode->i_atime, &attr->ia_atime)) {
|
|
ceph_encode_timespec(&req->r_args.setattr.atime,
|
|
&attr->ia_atime);
|
|
mask |= CEPH_SETATTR_ATIME;
|
|
release |= CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_RD |
|
|
CEPH_CAP_FILE_WR;
|
|
}
|
|
}
|
|
if (ia_valid & ATTR_MTIME) {
|
|
dout("setattr %p mtime %ld.%ld -> %ld.%ld\n", inode,
|
|
inode->i_mtime.tv_sec, inode->i_mtime.tv_nsec,
|
|
attr->ia_mtime.tv_sec, attr->ia_mtime.tv_nsec);
|
|
if (issued & CEPH_CAP_FILE_EXCL) {
|
|
ci->i_time_warp_seq++;
|
|
inode->i_mtime = attr->ia_mtime;
|
|
dirtied |= CEPH_CAP_FILE_EXCL;
|
|
} else if ((issued & CEPH_CAP_FILE_WR) &&
|
|
timespec_compare(&inode->i_mtime,
|
|
&attr->ia_mtime) < 0) {
|
|
inode->i_mtime = attr->ia_mtime;
|
|
dirtied |= CEPH_CAP_FILE_WR;
|
|
} else if ((issued & CEPH_CAP_FILE_SHARED) == 0 ||
|
|
!timespec_equal(&inode->i_mtime, &attr->ia_mtime)) {
|
|
ceph_encode_timespec(&req->r_args.setattr.mtime,
|
|
&attr->ia_mtime);
|
|
mask |= CEPH_SETATTR_MTIME;
|
|
release |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_RD |
|
|
CEPH_CAP_FILE_WR;
|
|
}
|
|
}
|
|
if (ia_valid & ATTR_SIZE) {
|
|
dout("setattr %p size %lld -> %lld\n", inode,
|
|
inode->i_size, attr->ia_size);
|
|
if ((issued & CEPH_CAP_FILE_EXCL) &&
|
|
attr->ia_size > inode->i_size) {
|
|
i_size_write(inode, attr->ia_size);
|
|
inode->i_blocks = calc_inode_blocks(attr->ia_size);
|
|
ci->i_reported_size = attr->ia_size;
|
|
dirtied |= CEPH_CAP_FILE_EXCL;
|
|
} else if ((issued & CEPH_CAP_FILE_SHARED) == 0 ||
|
|
attr->ia_size != inode->i_size) {
|
|
req->r_args.setattr.size = cpu_to_le64(attr->ia_size);
|
|
req->r_args.setattr.old_size =
|
|
cpu_to_le64(inode->i_size);
|
|
mask |= CEPH_SETATTR_SIZE;
|
|
release |= CEPH_CAP_FILE_SHARED | CEPH_CAP_FILE_RD |
|
|
CEPH_CAP_FILE_WR;
|
|
}
|
|
}
|
|
|
|
/* these do nothing */
|
|
if (ia_valid & ATTR_CTIME) {
|
|
bool only = (ia_valid & (ATTR_SIZE|ATTR_MTIME|ATTR_ATIME|
|
|
ATTR_MODE|ATTR_UID|ATTR_GID)) == 0;
|
|
dout("setattr %p ctime %ld.%ld -> %ld.%ld (%s)\n", inode,
|
|
inode->i_ctime.tv_sec, inode->i_ctime.tv_nsec,
|
|
attr->ia_ctime.tv_sec, attr->ia_ctime.tv_nsec,
|
|
only ? "ctime only" : "ignored");
|
|
if (only) {
|
|
/*
|
|
* if kernel wants to dirty ctime but nothing else,
|
|
* we need to choose a cap to dirty under, or do
|
|
* a almost-no-op setattr
|
|
*/
|
|
if (issued & CEPH_CAP_AUTH_EXCL)
|
|
dirtied |= CEPH_CAP_AUTH_EXCL;
|
|
else if (issued & CEPH_CAP_FILE_EXCL)
|
|
dirtied |= CEPH_CAP_FILE_EXCL;
|
|
else if (issued & CEPH_CAP_XATTR_EXCL)
|
|
dirtied |= CEPH_CAP_XATTR_EXCL;
|
|
else
|
|
mask |= CEPH_SETATTR_CTIME;
|
|
}
|
|
}
|
|
if (ia_valid & ATTR_FILE)
|
|
dout("setattr %p ATTR_FILE ... hrm!\n", inode);
|
|
|
|
if (dirtied) {
|
|
inode_dirty_flags = __ceph_mark_dirty_caps(ci, dirtied,
|
|
&prealloc_cf);
|
|
inode->i_ctime = attr->ia_ctime;
|
|
}
|
|
|
|
release &= issued;
|
|
spin_unlock(&ci->i_ceph_lock);
|
|
if (lock_snap_rwsem)
|
|
up_read(&mdsc->snap_rwsem);
|
|
|
|
if (inode_dirty_flags)
|
|
__mark_inode_dirty(inode, inode_dirty_flags);
|
|
|
|
|
|
if (mask) {
|
|
req->r_inode = inode;
|
|
ihold(inode);
|
|
req->r_inode_drop = release;
|
|
req->r_args.setattr.mask = cpu_to_le32(mask);
|
|
req->r_num_caps = 1;
|
|
req->r_stamp = attr->ia_ctime;
|
|
err = ceph_mdsc_do_request(mdsc, NULL, req);
|
|
}
|
|
dout("setattr %p result=%d (%s locally, %d remote)\n", inode, err,
|
|
ceph_cap_string(dirtied), mask);
|
|
|
|
ceph_mdsc_put_request(req);
|
|
ceph_free_cap_flush(prealloc_cf);
|
|
|
|
if (err >= 0 && (mask & CEPH_SETATTR_SIZE))
|
|
__ceph_do_pending_vmtruncate(inode);
|
|
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* setattr
|
|
*/
|
|
int ceph_setattr(struct dentry *dentry, struct iattr *attr)
|
|
{
|
|
struct inode *inode = d_inode(dentry);
|
|
int err;
|
|
|
|
if (ceph_snap(inode) != CEPH_NOSNAP)
|
|
return -EROFS;
|
|
|
|
err = setattr_prepare(dentry, attr);
|
|
if (err != 0)
|
|
return err;
|
|
|
|
err = __ceph_setattr(inode, attr);
|
|
|
|
if (err >= 0 && (attr->ia_valid & ATTR_MODE))
|
|
err = posix_acl_chmod(inode, attr->ia_mode);
|
|
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* Verify that we have a lease on the given mask. If not,
|
|
* do a getattr against an mds.
|
|
*/
|
|
int __ceph_do_getattr(struct inode *inode, struct page *locked_page,
|
|
int mask, bool force)
|
|
{
|
|
struct ceph_fs_client *fsc = ceph_sb_to_client(inode->i_sb);
|
|
struct ceph_mds_client *mdsc = fsc->mdsc;
|
|
struct ceph_mds_request *req;
|
|
int err;
|
|
|
|
if (ceph_snap(inode) == CEPH_SNAPDIR) {
|
|
dout("do_getattr inode %p SNAPDIR\n", inode);
|
|
return 0;
|
|
}
|
|
|
|
dout("do_getattr inode %p mask %s mode 0%o\n",
|
|
inode, ceph_cap_string(mask), inode->i_mode);
|
|
if (!force && ceph_caps_issued_mask(ceph_inode(inode), mask, 1))
|
|
return 0;
|
|
|
|
req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETATTR, USE_ANY_MDS);
|
|
if (IS_ERR(req))
|
|
return PTR_ERR(req);
|
|
req->r_inode = inode;
|
|
ihold(inode);
|
|
req->r_num_caps = 1;
|
|
req->r_args.getattr.mask = cpu_to_le32(mask);
|
|
req->r_locked_page = locked_page;
|
|
err = ceph_mdsc_do_request(mdsc, NULL, req);
|
|
if (locked_page && err == 0) {
|
|
u64 inline_version = req->r_reply_info.targeti.inline_version;
|
|
if (inline_version == 0) {
|
|
/* the reply is supposed to contain inline data */
|
|
err = -EINVAL;
|
|
} else if (inline_version == CEPH_INLINE_NONE) {
|
|
err = -ENODATA;
|
|
} else {
|
|
err = req->r_reply_info.targeti.inline_len;
|
|
}
|
|
}
|
|
ceph_mdsc_put_request(req);
|
|
dout("do_getattr result=%d\n", err);
|
|
return err;
|
|
}
|
|
|
|
|
|
/*
|
|
* Check inode permissions. We verify we have a valid value for
|
|
* the AUTH cap, then call the generic handler.
|
|
*/
|
|
int ceph_permission(struct inode *inode, int mask)
|
|
{
|
|
int err;
|
|
|
|
if (mask & MAY_NOT_BLOCK)
|
|
return -ECHILD;
|
|
|
|
err = ceph_do_getattr(inode, CEPH_CAP_AUTH_SHARED, false);
|
|
|
|
if (!err)
|
|
err = generic_permission(inode, mask);
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* Get all attributes. Hopefully somedata we'll have a statlite()
|
|
* and can limit the fields we require to be accurate.
|
|
*/
|
|
int ceph_getattr(const struct path *path, struct kstat *stat,
|
|
u32 request_mask, unsigned int flags)
|
|
{
|
|
struct inode *inode = d_inode(path->dentry);
|
|
struct ceph_inode_info *ci = ceph_inode(inode);
|
|
int err;
|
|
|
|
err = ceph_do_getattr(inode, CEPH_STAT_CAP_INODE_ALL, false);
|
|
if (!err) {
|
|
generic_fillattr(inode, stat);
|
|
stat->ino = ceph_translate_ino(inode->i_sb, inode->i_ino);
|
|
if (ceph_snap(inode) != CEPH_NOSNAP)
|
|
stat->dev = ceph_snap(inode);
|
|
else
|
|
stat->dev = 0;
|
|
if (S_ISDIR(inode->i_mode)) {
|
|
if (ceph_test_mount_opt(ceph_sb_to_client(inode->i_sb),
|
|
RBYTES))
|
|
stat->size = ci->i_rbytes;
|
|
else
|
|
stat->size = ci->i_files + ci->i_subdirs;
|
|
stat->blocks = 0;
|
|
stat->blksize = 65536;
|
|
}
|
|
}
|
|
return err;
|
|
}
|