diff options
Diffstat (limited to 'ANDROID_3.4.5/fs/ceph/inode.c')
| -rw-r--r-- | ANDROID_3.4.5/fs/ceph/inode.c | 1811 |
1 files changed, 0 insertions, 1811 deletions
diff --git a/ANDROID_3.4.5/fs/ceph/inode.c b/ANDROID_3.4.5/fs/ceph/inode.c deleted file mode 100644 index 9fff9f3b..00000000 --- a/ANDROID_3.4.5/fs/ceph/inode.c +++ /dev/null @@ -1,1811 +0,0 @@ -#include <linux/ceph/ceph_debug.h> - -#include <linux/module.h> -#include <linux/fs.h> -#include <linux/slab.h> -#include <linux/string.h> -#include <linux/uaccess.h> -#include <linux/kernel.h> -#include <linux/namei.h> -#include <linux/writeback.h> -#include <linux/vmalloc.h> - -#include "super.h" -#include "mds_client.h" -#include <linux/ceph/decode.h> - -/* - * Ceph inode operations - * - * Implement basic inode helpers (get, alloc) and inode ops (getattr, - * setattr, etc.), xattr helpers, and helpers for assimilating - * metadata returned by the MDS into our cache. - * - * Also define helpers for doing asynchronous writeback, invalidation, - * and truncation for the benefit of those who can't afford to block - * (typically because they are in the message handler path). - */ - -static const struct inode_operations ceph_symlink_iops; - -static void ceph_invalidate_work(struct work_struct *work); -static void ceph_writeback_work(struct work_struct *work); -static void ceph_vmtruncate_work(struct work_struct *work); - -/* - * find or create an inode, given the ceph ino number - */ -static int ceph_set_ino_cb(struct inode *inode, void *data) -{ - ceph_inode(inode)->i_vino = *(struct ceph_vino *)data; - inode->i_ino = ceph_vino_to_ino(*(struct ceph_vino *)data); - return 0; -} - -struct inode *ceph_get_inode(struct super_block *sb, struct ceph_vino vino) -{ - struct inode *inode; - ino_t t = ceph_vino_to_ino(vino); - - inode = iget5_locked(sb, t, ceph_ino_compare, ceph_set_ino_cb, &vino); - if (inode == NULL) - return ERR_PTR(-ENOMEM); - if (inode->i_state & I_NEW) { - dout("get_inode created new inode %p %llx.%llx ino %llx\n", - inode, ceph_vinop(inode), (u64)inode->i_ino); - unlock_new_inode(inode); - } - - dout("get_inode on %lu=%llx.%llx got %p\n", inode->i_ino, vino.ino, - vino.snap, inode); - return inode; -} - -/* - * get/constuct snapdir inode for a given directory - */ -struct inode *ceph_get_snapdir(struct inode *parent) -{ - struct ceph_vino vino = { - .ino = ceph_ino(parent), - .snap = CEPH_SNAPDIR, - }; - struct inode *inode = ceph_get_inode(parent->i_sb, vino); - struct ceph_inode_info *ci = ceph_inode(inode); - - BUG_ON(!S_ISDIR(parent->i_mode)); - if (IS_ERR(inode)) - return inode; - inode->i_mode = parent->i_mode; - inode->i_uid = parent->i_uid; - inode->i_gid = parent->i_gid; - inode->i_op = &ceph_dir_iops; - inode->i_fop = &ceph_dir_fops; - ci->i_snap_caps = CEPH_CAP_PIN; /* so we can open */ - ci->i_rbytes = 0; - return inode; -} - -const struct inode_operations ceph_file_iops = { - .permission = ceph_permission, - .setattr = ceph_setattr, - .getattr = ceph_getattr, - .setxattr = ceph_setxattr, - .getxattr = ceph_getxattr, - .listxattr = ceph_listxattr, - .removexattr = ceph_removexattr, -}; - - -/* - * We use a 'frag tree' to keep track of the MDS's directory fragments - * for a given inode (usually there is just a single fragment). We - * need to know when a child frag is delegated to a new MDS, or when - * it is flagged as replicated, so we can direct our requests - * accordingly. - */ - -/* - * find/create a frag in the tree - */ -static struct ceph_inode_frag *__get_or_create_frag(struct ceph_inode_info *ci, - u32 f) -{ - struct rb_node **p; - struct rb_node *parent = NULL; - struct ceph_inode_frag *frag; - int c; - - p = &ci->i_fragtree.rb_node; - while (*p) { - parent = *p; - frag = rb_entry(parent, struct ceph_inode_frag, node); - c = ceph_frag_compare(f, frag->frag); - if (c < 0) - p = &(*p)->rb_left; - else if (c > 0) - p = &(*p)->rb_right; - else - return frag; - } - - frag = kmalloc(sizeof(*frag), GFP_NOFS); - if (!frag) { - pr_err("__get_or_create_frag ENOMEM on %p %llx.%llx " - "frag %x\n", &ci->vfs_inode, - ceph_vinop(&ci->vfs_inode), f); - return ERR_PTR(-ENOMEM); - } - frag->frag = f; - frag->split_by = 0; - frag->mds = -1; - frag->ndist = 0; - - rb_link_node(&frag->node, parent, p); - rb_insert_color(&frag->node, &ci->i_fragtree); - - dout("get_or_create_frag added %llx.%llx frag %x\n", - ceph_vinop(&ci->vfs_inode), f); - return frag; -} - -/* - * find a specific frag @f - */ -struct ceph_inode_frag *__ceph_find_frag(struct ceph_inode_info *ci, u32 f) -{ - struct rb_node *n = ci->i_fragtree.rb_node; - - while (n) { - struct ceph_inode_frag *frag = - rb_entry(n, struct ceph_inode_frag, node); - int c = ceph_frag_compare(f, frag->frag); - if (c < 0) - n = n->rb_left; - else if (c > 0) - n = n->rb_right; - else - return frag; - } - return NULL; -} - -/* - * Choose frag containing the given value @v. If @pfrag is - * specified, copy the frag delegation info to the caller if - * it is present. - */ -u32 ceph_choose_frag(struct ceph_inode_info *ci, u32 v, - struct ceph_inode_frag *pfrag, - int *found) -{ - u32 t = ceph_frag_make(0, 0); - struct ceph_inode_frag *frag; - unsigned nway, i; - u32 n; - - if (found) - *found = 0; - - mutex_lock(&ci->i_fragtree_mutex); - while (1) { - WARN_ON(!ceph_frag_contains_value(t, v)); - frag = __ceph_find_frag(ci, t); - if (!frag) - break; /* t is a leaf */ - if (frag->split_by == 0) { - if (pfrag) - memcpy(pfrag, frag, sizeof(*pfrag)); - if (found) - *found = 1; - break; - } - - /* choose child */ - nway = 1 << frag->split_by; - dout("choose_frag(%x) %x splits by %d (%d ways)\n", v, t, - frag->split_by, nway); - for (i = 0; i < nway; i++) { - n = ceph_frag_make_child(t, frag->split_by, i); - if (ceph_frag_contains_value(n, v)) { - t = n; - break; - } - } - BUG_ON(i == nway); - } - dout("choose_frag(%x) = %x\n", v, t); - - mutex_unlock(&ci->i_fragtree_mutex); - return t; -} - -/* - * Process dirfrag (delegation) info from the mds. Include leaf - * fragment in tree ONLY if ndist > 0. Otherwise, only - * branches/splits are included in i_fragtree) - */ -static int ceph_fill_dirfrag(struct inode *inode, - struct ceph_mds_reply_dirfrag *dirinfo) -{ - struct ceph_inode_info *ci = ceph_inode(inode); - struct ceph_inode_frag *frag; - u32 id = le32_to_cpu(dirinfo->frag); - int mds = le32_to_cpu(dirinfo->auth); - int ndist = le32_to_cpu(dirinfo->ndist); - int i; - int err = 0; - - mutex_lock(&ci->i_fragtree_mutex); - if (ndist == 0) { - /* no delegation info needed. */ - frag = __ceph_find_frag(ci, id); - if (!frag) - goto out; - if (frag->split_by == 0) { - /* tree leaf, remove */ - dout("fill_dirfrag removed %llx.%llx frag %x" - " (no ref)\n", ceph_vinop(inode), id); - rb_erase(&frag->node, &ci->i_fragtree); - kfree(frag); - } else { - /* tree branch, keep and clear */ - dout("fill_dirfrag cleared %llx.%llx frag %x" - " referral\n", ceph_vinop(inode), id); - frag->mds = -1; - frag->ndist = 0; - } - goto out; - } - - - /* find/add this frag to store mds delegation info */ - frag = __get_or_create_frag(ci, id); - if (IS_ERR(frag)) { - /* this is not the end of the world; we can continue - with bad/inaccurate delegation info */ - pr_err("fill_dirfrag ENOMEM on mds ref %llx.%llx fg %x\n", - ceph_vinop(inode), le32_to_cpu(dirinfo->frag)); - err = -ENOMEM; - goto out; - } - - frag->mds = mds; - frag->ndist = min_t(u32, ndist, CEPH_MAX_DIRFRAG_REP); - for (i = 0; i < frag->ndist; i++) - frag->dist[i] = le32_to_cpu(dirinfo->dist[i]); - dout("fill_dirfrag %llx.%llx frag %x ndist=%d\n", - ceph_vinop(inode), frag->frag, frag->ndist); - -out: - mutex_unlock(&ci->i_fragtree_mutex); - return err; -} - - -/* - * 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_time_warp_seq = 0; - ci->i_ceph_flags = 0; - ci->i_release_count = 0; - ci->i_symlink = NULL; - - memset(&ci->i_dir_layout, 0, sizeof(ci->i_dir_layout)); - - 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_cap_flush_seq = 0; - ci->i_cap_flush_last_tid = 0; - memset(&ci->i_cap_flush_tid, 0, sizeof(ci->i_cap_flush_tid)); - 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); - ci->i_cap_exporting_mds = 0; - ci->i_cap_exporting_mseq = 0; - ci->i_cap_exporting_issued = 0; - INIT_LIST_HEAD(&ci->i_cap_snaps); - ci->i_head_snapc = NULL; - ci->i_snap_caps = 0; - - for (i = 0; i < CEPH_FILE_MODE_NUM; i++) - ci->i_nr_by_mode[i] = 0; - - 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_writes); - INIT_LIST_HEAD(&ci->i_unsafe_dirops); - 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); - - 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_queue_caps_release(inode); - - /* - * we may still have a snap_realm reference if there are stray - * caps in i_cap_exporting_issued or 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); - } - - __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); - - call_rcu(&inode->i_rcu, ceph_i_callback); -} - - -/* - * 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); - inode->i_size = size; - inode->i_blocks = (size + (1<<9) - 1) >> 9; - 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; - /* - * 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_RD| - CEPH_CAP_FILE_WR|CEPH_CAP_FILE_BUFFER| - CEPH_CAP_FILE_EXCL| - CEPH_CAP_FILE_LAZYIO)) || - 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; - } - 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 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_reply_inode *info = iinfo->in; - struct ceph_inode_info *ci = ceph_inode(inode); - int i; - int issued = 0, implemented; - int updating_inode = 0; - struct timespec mtime, atime, ctime; - u32 nsplits; - struct ceph_buffer *xattr_blob = NULL; - int err = 0; - int queue_trunc = 0; - - 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 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); - } - - 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 (le64_to_cpu(info->version) > 0 && - (ci->i_version & ~1) >= le64_to_cpu(info->version)) - goto no_change; - - updating_inode = 1; - issued = __ceph_caps_issued(ci, &implemented); - issued |= implemented | __ceph_caps_dirty(ci); - - /* update inode */ - ci->i_version = le64_to_cpu(info->version); - inode->i_version++; - inode->i_rdev = le32_to_cpu(info->rdev); - - if ((issued & CEPH_CAP_AUTH_EXCL) == 0) { - inode->i_mode = le32_to_cpu(info->mode); - inode->i_uid = le32_to_cpu(info->uid); - inode->i_gid = le32_to_cpu(info->gid); - dout("%p mode 0%o uid.gid %d.%d\n", inode, inode->i_mode, - inode->i_uid, inode->i_gid); - } - - if ((issued & CEPH_CAP_LINK_EXCL) == 0) - set_nlink(inode, le32_to_cpu(info->nlink)); - - /* be careful with mtime, atime, size */ - ceph_decode_timespec(&atime, &info->atime); - ceph_decode_timespec(&mtime, &info->mtime); - ceph_decode_timespec(&ctime, &info->ctime); - 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)); - ceph_fill_file_time(inode, issued, - le32_to_cpu(info->time_warp_seq), - &ctime, &mtime, &atime); - - /* 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); - } - - ci->i_layout = info->layout; - inode->i_blkbits = fls(le32_to_cpu(info->layout.fl_stripe_unit)) - 1; - - /* xattrs */ - /* note that if i_xattrs.len <= 4, i_xattrs.data will still be NULL. */ - if ((issued & CEPH_CAP_XATTR_EXCL) == 0 && - 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); - xattr_blob = NULL; - } - - inode->i_mapping->a_ops = &ceph_aops; - inode->i_mapping->backing_dev_info = - &ceph_sb_to_client(inode->i_sb)->backing_dev_info; - - 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); - - err = -EINVAL; - if (WARN_ON(symlen != inode->i_size)) - goto out; - - 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 */ - } - 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); - } - -no_change: - spin_unlock(&ci->i_ceph_lock); - - /* queue truncate if we saw i_size decrease */ - if (queue_trunc) - ceph_queue_vmtruncate(inode); - - /* populate frag tree */ - /* FIXME: move me up, if/when version reflects fragtree changes */ - nsplits = le32_to_cpu(info->fragtree.nsplits); - mutex_lock(&ci->i_fragtree_mutex); - for (i = 0; i < nsplits; i++) { - u32 id = le32_to_cpu(info->fragtree.splits[i].frag); - struct ceph_inode_frag *frag = __get_or_create_frag(ci, id); - - if (IS_ERR(frag)) - continue; - frag->split_by = le32_to_cpu(info->fragtree.splits[i].by); - dout(" frag %x split by %d\n", frag->frag, frag->split_by); - } - mutex_unlock(&ci->i_fragtree_mutex); - - /* were we issued a capability? */ - if (info->cap.caps) { - if (ceph_snap(inode) == CEPH_NOSNAP) { - ceph_add_cap(inode, session, - le64_to_cpu(info->cap.cap_id), - cap_fmode, - le32_to_cpu(info->cap.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, - caps_reservation); - } else { - spin_lock(&ci->i_ceph_lock); - 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); - spin_unlock(&ci->i_ceph_lock); - } - } else if (cap_fmode >= 0) { - pr_warning("mds issued no caps on %llx.%llx\n", - ceph_vinop(inode)); - __ceph_get_fmode(ci, cap_fmode); - } - - /* set dir completion flag? */ - if (S_ISDIR(inode->i_mode) && - updating_inode && /* didn't jump to no_change */ - ci->i_files == 0 && ci->i_subdirs == 0 && - ceph_snap(inode) == CEPH_NOSNAP && - (le32_to_cpu(info->cap.caps) & CEPH_CAP_FILE_SHARED) && - (issued & CEPH_CAP_FILE_EXCL) == 0 && - !ceph_dir_test_complete(inode)) { - dout(" marking %p complete (empty)\n", inode); - ceph_dir_set_complete(inode); - ci->i_max_offset = 2; - } - - /* update delegation info? */ - if (dirinfo) - ceph_fill_dirfrag(inode, dirinfo); - - err = 0; - -out: - if (xattr_blob) - ceph_buffer_put(xattr_blob); - 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_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; - - /* only track leases on regular dentries */ - if (dentry->d_op != &ceph_dentry_ops) - return; - - spin_lock(&dentry->d_lock); - dout("update_dentry_lease %p duration %lu ms ttl %lu\n", - dentry, duration, ttl); - - /* make lease_rdcache_gen match directory */ - dir = dentry->d_parent->d_inode; - 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, dentry->d_time)) - goto out_unlock; /* we already have a newer lease. */ - - if (di->lease_session && di->lease_session != session) - goto out_unlock; - - 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; - dentry->d_time = ttl; -out_unlock: - spin_unlock(&dentry->d_lock); - return; -} - -/* - * Set dentry's directory position based on the current dir's max, and - * order it in d_subdirs, so that dcache_readdir behaves. - * - * Always called under directory's i_mutex. - */ -static void ceph_set_dentry_offset(struct dentry *dn) -{ - struct dentry *dir = dn->d_parent; - struct inode *inode = dir->d_inode; - struct ceph_inode_info *ci; - struct ceph_dentry_info *di; - - BUG_ON(!inode); - - ci = ceph_inode(inode); - di = ceph_dentry(dn); - - spin_lock(&ci->i_ceph_lock); - if (!ceph_dir_test_complete(inode)) { - spin_unlock(&ci->i_ceph_lock); - return; - } - di->offset = ceph_inode(inode)->i_max_offset++; - spin_unlock(&ci->i_ceph_lock); - - spin_lock(&dir->d_lock); - spin_lock_nested(&dn->d_lock, DENTRY_D_LOCK_NESTED); - list_move(&dn->d_u.d_child, &dir->d_subdirs); - dout("set_dentry_offset %p %lld (%p %p)\n", dn, di->offset, - dn->d_u.d_child.prev, dn->d_u.d_child.next); - spin_unlock(&dn->d_lock); - spin_unlock(&dir->d_lock); -} - -/* - * splice a dentry to an inode. - * caller must hold directory i_mutex for this to be safe. - * - * we will only rehash the resulting dentry if @prehash is - * true; @prehash will be set to false (for the benefit of - * the caller) if we fail. - */ -static struct dentry *splice_dentry(struct dentry *dn, struct inode *in, - bool *prehash, bool set_offset) -{ - struct dentry *realdn; - - BUG_ON(dn->d_inode); - - /* dn must be unhashed */ - if (!d_unhashed(dn)) - d_drop(dn); - realdn = d_materialise_unique(dn, in); - 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)); - if (prehash) - *prehash = false; /* don't rehash on error */ - 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, dn->d_count, - realdn, realdn->d_count, - realdn->d_inode, ceph_vinop(realdn->d_inode)); - dput(dn); - dn = realdn; - } else { - BUG_ON(!ceph_dentry(dn)); - dout("dn %p attached to %p ino %llx.%llx\n", - dn, dn->d_inode, ceph_vinop(dn->d_inode)); - } - if ((!prehash || *prehash) && d_unhashed(dn)) - d_rehash(dn); - if (set_offset) - ceph_set_dentry_offset(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) -{ - struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info; - struct inode *in = NULL; - struct ceph_mds_reply_inode *ininfo; - struct ceph_vino vino; - struct ceph_fs_client *fsc = ceph_sb_to_client(sb); - int i = 0; - int err = 0; - - dout("fill_trace %p is_dentry %d is_target %d\n", req, - rinfo->head->is_dentry, rinfo->head->is_target); - -#if 0 - /* - * Debugging hook: - * - * If we resend completed ops to a recovering mds, we get no - * trace. Since that is very rare, pretend this is the case - * to ensure the 'no trace' handlers in the callers behave. - * - * Fill in inodes unconditionally to avoid breaking cap - * invariants. - */ - if (rinfo->head->op & CEPH_MDS_OP_WRITE) { - pr_info("fill_trace faking empty trace on %lld %s\n", - req->r_tid, ceph_mds_op_name(rinfo->head->op)); - if (rinfo->head->is_dentry) { - rinfo->head->is_dentry = 0; - err = fill_inode(req->r_locked_dir, - &rinfo->diri, rinfo->dirfrag, - session, req->r_request_started, -1); - } - if (rinfo->head->is_target) { - rinfo->head->is_target = 0; - ininfo = rinfo->targeti.in; - vino.ino = le64_to_cpu(ininfo->ino); - vino.snap = le64_to_cpu(ininfo->snapid); - in = ceph_get_inode(sb, vino); - err = fill_inode(in, &rinfo->targeti, NULL, - session, req->r_request_started, - req->r_fmode); - iput(in); - } - } -#endif - - if (!rinfo->head->is_target && !rinfo->head->is_dentry) { - dout("fill_trace reply is empty!\n"); - if (rinfo->head->result == 0 && req->r_locked_dir) - ceph_invalidate_dir_request(req); - return 0; - } - - if (rinfo->head->is_dentry) { - struct inode *dir = req->r_locked_dir; - - err = fill_inode(dir, &rinfo->diri, rinfo->dirfrag, - session, req->r_request_started, -1, - &req->r_caps_reservation); - if (err < 0) - return err; - } - - /* - * ignore null lease/binding on snapdir ENOENT, or else we - * will have trouble splicing in the virtual snapdir later - */ - if (rinfo->head->is_dentry && !req->r_aborted && - (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_locked_dir; - struct dentry *dn = req->r_dentry; - bool have_dir_cap, have_lease; - - BUG_ON(!dn); - BUG_ON(!dir); - BUG_ON(dn->d_parent->d_inode != dir); - BUG_ON(ceph_ino(dir) != - le64_to_cpu(rinfo->diri.in->ino)); - BUG_ON(ceph_snap(dir) != - le64_to_cpu(rinfo->diri.in->snapid)); - - /* 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) { - dout(" src %p '%.*s' dst %p '%.*s'\n", - req->r_old_dentry, - req->r_old_dentry->d_name.len, - req->r_old_dentry->d_name.name, - dn, dn->d_name.len, dn->d_name.name); - dout("fill_trace doing d_move %p -> %p\n", - req->r_old_dentry, dn); - - d_move(req->r_old_dentry, dn); - dout(" src %p '%.*s' dst %p '%.*s'\n", - req->r_old_dentry, - req->r_old_dentry->d_name.len, - req->r_old_dentry->d_name.name, - dn, dn->d_name.len, dn->d_name.name); - - /* ensure target dentry is invalidated, despite - rehashing bug in vfs_rename_dir */ - ceph_invalidate_dentry_lease(dn); - - /* - * d_move() puts the renamed dentry at the end of - * d_subdirs. We need to assign it an appropriate - * directory offset so we can behave when holding - * D_COMPLETE. - */ - ceph_set_dentry_offset(req->r_old_dentry); - 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 */ - in = dn->d_inode; - } - - /* null dentry? */ - if (!rinfo->head->is_target) { - dout("fill_trace null dentry\n"); - if (dn->d_inode) { - dout("d_delete %p\n", dn); - d_delete(dn); - } else { - dout("d_instantiate %p NULL\n", dn); - d_instantiate(dn, NULL); - if (have_lease && d_unhashed(dn)) - d_rehash(dn); - update_dentry_lease(dn, rinfo->dlease, - session, - req->r_request_started); - } - goto done; - } - - /* attach proper inode */ - ininfo = rinfo->targeti.in; - vino.ino = le64_to_cpu(ininfo->ino); - vino.snap = le64_to_cpu(ininfo->snapid); - in = dn->d_inode; - if (!in) { - in = ceph_get_inode(sb, vino); - if (IS_ERR(in)) { - pr_err("fill_trace bad get_inode " - "%llx.%llx\n", vino.ino, vino.snap); - err = PTR_ERR(in); - d_delete(dn); - goto done; - } - dn = splice_dentry(dn, in, &have_lease, true); - if (IS_ERR(dn)) { - err = PTR_ERR(dn); - goto done; - } - req->r_dentry = dn; /* may have spliced */ - ihold(in); - } else if (ceph_ino(in) == vino.ino && - ceph_snap(in) == vino.snap) { - ihold(in); - } else { - dout(" %p links to %p %llx.%llx, not %llx.%llx\n", - dn, in, ceph_ino(in), ceph_snap(in), - vino.ino, vino.snap); - have_lease = false; - in = NULL; - } - - if (have_lease) - update_dentry_lease(dn, rinfo->dlease, session, - req->r_request_started); - dout(" final dn %p\n", dn); - i++; - } else if (req->r_op == CEPH_MDS_OP_LOOKUPSNAP || - req->r_op == CEPH_MDS_OP_MKSNAP) { - struct dentry *dn = req->r_dentry; - - /* fill out a snapdir LOOKUPSNAP dentry */ - BUG_ON(!dn); - BUG_ON(!req->r_locked_dir); - BUG_ON(ceph_snap(req->r_locked_dir) != CEPH_SNAPDIR); - ininfo = rinfo->targeti.in; - vino.ino = le64_to_cpu(ininfo->ino); - vino.snap = le64_to_cpu(ininfo->snapid); - in = ceph_get_inode(sb, vino); - if (IS_ERR(in)) { - pr_err("fill_inode get_inode badness %llx.%llx\n", - vino.ino, vino.snap); - err = PTR_ERR(in); - d_delete(dn); - goto done; - } - dout(" linking snapped dir %p to dn %p\n", in, dn); - dn = splice_dentry(dn, in, NULL, true); - if (IS_ERR(dn)) { - err = PTR_ERR(dn); - goto done; - } - req->r_dentry = dn; /* may have spliced */ - ihold(in); - rinfo->head->is_dentry = 1; /* fool notrace handlers */ - } - - if (rinfo->head->is_target) { - vino.ino = le64_to_cpu(rinfo->targeti.in->ino); - vino.snap = le64_to_cpu(rinfo->targeti.in->snapid); - - if (in == NULL || ceph_ino(in) != vino.ino || - ceph_snap(in) != vino.snap) { - in = ceph_get_inode(sb, vino); - if (IS_ERR(in)) { - err = PTR_ERR(in); - goto done; - } - } - req->r_target_inode = in; - - err = fill_inode(in, - &rinfo->targeti, NULL, - session, req->r_request_started, - (le32_to_cpu(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; - } - } - -done: - dout("fill_trace done err=%d\n", err); - return err; -} - -/* - * Prepopulate our cache with readdir results, leases, etc. - */ -int ceph_readdir_prepopulate(struct ceph_mds_request *req, - struct ceph_mds_session *session) -{ - struct dentry *parent = req->r_dentry; - struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info; - struct qstr dname; - struct dentry *dn; - struct inode *in; - int err = 0, i; - struct inode *snapdir = NULL; - struct ceph_mds_request_head *rhead = req->r_request->front.iov_base; - u64 frag = le32_to_cpu(rhead->args.readdir.frag); - struct ceph_dentry_info *di; - - if (le32_to_cpu(rinfo->head->op) == CEPH_MDS_OP_LSSNAP) { - snapdir = ceph_get_snapdir(parent->d_inode); - parent = d_find_alias(snapdir); - 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(parent->d_inode, rinfo->dir_dir); - } - - for (i = 0; i < rinfo->dir_nr; i++) { - struct ceph_vino vino; - - dname.name = rinfo->dir_dname[i]; - dname.len = rinfo->dir_dname_len[i]; - dname.hash = full_name_hash(dname.name, dname.len); - - vino.ino = le64_to_cpu(rinfo->dir_in[i].in->ino); - vino.snap = le64_to_cpu(rinfo->dir_in[i].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 == NULL) { - dout("d_alloc badness\n"); - err = -ENOMEM; - goto out; - } - err = ceph_init_dentry(dn); - if (err < 0) { - dput(dn); - goto out; - } - } else if (dn->d_inode && - (ceph_ino(dn->d_inode) != vino.ino || - ceph_snap(dn->d_inode) != vino.snap)) { - dout(" dn %p points to wrong inode %p\n", - dn, dn->d_inode); - d_delete(dn); - dput(dn); - goto retry_lookup; - } else { - /* reorder parent's d_subdirs */ - spin_lock(&parent->d_lock); - spin_lock_nested(&dn->d_lock, DENTRY_D_LOCK_NESTED); - list_move(&dn->d_u.d_child, &parent->d_subdirs); - spin_unlock(&dn->d_lock); - spin_unlock(&parent->d_lock); - } - - di = dn->d_fsdata; - di->offset = ceph_make_fpos(frag, i + req->r_readdir_offset); - - /* inode */ - if (dn->d_inode) { - in = dn->d_inode; - } else { - in = ceph_get_inode(parent->d_sb, vino); - if (IS_ERR(in)) { - dout("new_inode badness\n"); - d_delete(dn); - dput(dn); - err = PTR_ERR(in); - goto out; - } - dn = splice_dentry(dn, in, NULL, false); - if (IS_ERR(dn)) - dn = NULL; - } - - if (fill_inode(in, &rinfo->dir_in[i], NULL, session, - req->r_request_started, -1, - &req->r_caps_reservation) < 0) { - pr_err("fill_inode badness on %p\n", in); - goto next_item; - } - if (dn) - update_dentry_lease(dn, rinfo->dir_dlease[i], - req->r_session, - req->r_request_started); -next_item: - if (dn) - dput(dn); - } - req->r_did_prepopulate = true; - -out: - if (snapdir) { - iput(snapdir); - dput(parent); - } - dout("readdir_prepopulate done\n"); - return err; -} - -int ceph_inode_set_size(struct inode *inode, loff_t size) -{ - struct ceph_inode_info *ci = ceph_inode(inode); - int ret = 0; - - spin_lock(&ci->i_ceph_lock); - dout("set_size %p %llu -> %llu\n", inode, inode->i_size, size); - inode->i_size = size; - inode->i_blocks = (size + (1 << 9) - 1) >> 9; - - /* tell the MDS if we are approaching max_size */ - if ((size << 1) >= ci->i_max_size && - (ci->i_reported_size << 1) < ci->i_max_size) - ret = 1; - - 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; - u32 orig_gen; - int check = 0; - - 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) { - /* nevermind! */ - spin_unlock(&ci->i_ceph_lock); - goto out; - } - orig_gen = ci->i_rdcache_gen; - spin_unlock(&ci->i_ceph_lock); - - truncate_inode_pages(&inode->i_data, 0); - - 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); - } - spin_unlock(&ci->i_ceph_lock); - - if (check) - ceph_check_caps(ci, 0, NULL); -out: - iput(inode); -} - - -/* - * called by trunc_wq; take i_mutex ourselves - * - * 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); - mutex_lock(&inode->i_mutex); - __ceph_do_pending_vmtruncate(inode); - mutex_unlock(&inode->i_mutex); - 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); - } -} - -/* - * called with i_mutex held. - * - * 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, wake = 0; - -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); - 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) { - dout("__do_pending_vmtruncate %p flushing snaps first\n", - inode); - spin_unlock(&ci->i_ceph_lock); - filemap_write_and_wait_range(&inode->i_data, 0, - inode->i_sb->s_maxbytes); - goto retry; - } - - 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_inode_pages(inode->i_mapping, to); - - spin_lock(&ci->i_ceph_lock); - ci->i_truncate_pending--; - if (ci->i_truncate_pending == 0) - wake = 1; - spin_unlock(&ci->i_ceph_lock); - - if (wrbuffer_refs == 0) - ceph_check_caps(ci, CHECK_CAPS_AUTHONLY, NULL); - if (wake) - wake_up_all(&ci->i_cap_wq); -} - - -/* - * symlinks - */ -static void *ceph_sym_follow_link(struct dentry *dentry, struct nameidata *nd) -{ - struct ceph_inode_info *ci = ceph_inode(dentry->d_inode); - nd_set_link(nd, ci->i_symlink); - return NULL; -} - -static const struct inode_operations ceph_symlink_iops = { - .readlink = generic_readlink, - .follow_link = ceph_sym_follow_link, -}; - -/* - * setattr - */ -int ceph_setattr(struct dentry *dentry, struct iattr *attr) -{ - struct inode *inode = dentry->d_inode; - struct ceph_inode_info *ci = ceph_inode(inode); - struct inode *parent_inode; - const unsigned int ia_valid = attr->ia_valid; - struct ceph_mds_request *req; - struct ceph_mds_client *mdsc = ceph_sb_to_client(dentry->d_sb)->mdsc; - int issued; - int release = 0, dirtied = 0; - int mask = 0; - int err = 0; - int inode_dirty_flags = 0; - - if (ceph_snap(inode) != CEPH_NOSNAP) - return -EROFS; - - __ceph_do_pending_vmtruncate(inode); - - err = inode_change_ok(inode, attr); - if (err != 0) - return err; - - req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SETATTR, - USE_AUTH_MDS); - if (IS_ERR(req)) - return PTR_ERR(req); - - 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, - inode->i_uid, 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 || - attr->ia_uid != inode->i_uid) { - req->r_args.setattr.uid = cpu_to_le32(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, - inode->i_gid, 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 || - attr->ia_gid != inode->i_gid) { - req->r_args.setattr.gid = cpu_to_le32(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) { - 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 (attr->ia_size > inode->i_sb->s_maxbytes) { - err = -EINVAL; - goto out; - } - if ((issued & CEPH_CAP_FILE_EXCL) && - attr->ia_size > inode->i_size) { - inode->i_size = attr->ia_size; - inode->i_blocks = - (attr->ia_size + (1 << 9) - 1) >> 9; - inode->i_ctime = attr->ia_ctime; - 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"); - inode->i_ctime = attr->ia_ctime; - 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); - inode->i_ctime = CURRENT_TIME; - } - - release &= issued; - spin_unlock(&ci->i_ceph_lock); - - 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; - parent_inode = ceph_get_dentry_parent_inode(dentry); - err = ceph_mdsc_do_request(mdsc, parent_inode, req); - iput(parent_inode); - } - dout("setattr %p result=%d (%s locally, %d remote)\n", inode, err, - ceph_cap_string(dirtied), mask); - - ceph_mdsc_put_request(req); - __ceph_do_pending_vmtruncate(inode); - return err; -out: - spin_unlock(&ci->i_ceph_lock); - ceph_mdsc_put_request(req); - 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, int mask) -{ - 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 (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); - err = ceph_mdsc_do_request(mdsc, NULL, req); - 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); - - 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(struct vfsmount *mnt, struct dentry *dentry, - struct kstat *stat) -{ - struct inode *inode = dentry->d_inode; - struct ceph_inode_info *ci = ceph_inode(inode); - int err; - - err = ceph_do_getattr(inode, CEPH_STAT_CAP_INODE_ALL); - 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; -} |