X-Git-Url: https://git.karo-electronics.de/?a=blobdiff_plain;f=fs%2Fnfs%2Fdir.c;h=9ca38ab0e0a7d0c2c36229ac58fab9b413aa9121;hb=0a5ebc148879be68acdb12fbe72b65cb88c410d9;hp=ac92e45432a340fd82213d960660b06273fff4a2;hpb=b42895d6fe66995ab101c15d9a59c78474dbf382;p=karo-tx-linux.git diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c index ac92e45432a3..9ca38ab0e0a7 100644 --- a/fs/nfs/dir.c +++ b/fs/nfs/dir.c @@ -33,6 +33,7 @@ #include #include #include +#include #include "nfs4_fs.h" #include "delegation.h" @@ -199,9 +200,6 @@ int nfs_readdir_filler(nfs_readdir_descriptor_t *desc, struct page *page) desc->timestamp = timestamp; desc->timestamp_valid = 1; SetPageUptodate(page); - spin_lock(&inode->i_lock); - NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATIME; - spin_unlock(&inode->i_lock); /* Ensure consistent page alignment of the data. * Note: assumes we have exclusive access to this mapping either * through inode->i_mutex or some other mechanism. @@ -406,7 +404,7 @@ int nfs_do_filldir(nfs_readdir_descriptor_t *desc, void *dirent, struct file *file = desc->file; struct nfs_entry *entry = desc->entry; struct dentry *dentry = NULL; - unsigned long fileid; + u64 fileid; int loop_count = 0, res; @@ -417,7 +415,7 @@ int nfs_do_filldir(nfs_readdir_descriptor_t *desc, void *dirent, unsigned d_type = DT_UNKNOWN; /* Note: entry->prev_cookie contains the cookie for * retrieving the current dirent on the server */ - fileid = nfs_fileid_to_ino_t(entry->ino); + fileid = entry->ino; /* Get a dentry if we have one */ if (dentry != NULL) @@ -427,7 +425,7 @@ int nfs_do_filldir(nfs_readdir_descriptor_t *desc, void *dirent, /* Use readdirplus info */ if (dentry != NULL && dentry->d_inode != NULL) { d_type = dt_type(dentry->d_inode); - fileid = dentry->d_inode->i_ino; + fileid = NFS_FILEID(dentry->d_inode); } res = filldir(dirent, entry->name, entry->len, @@ -489,9 +487,6 @@ int uncached_readdir(nfs_readdir_descriptor_t *desc, void *dirent, page, NFS_SERVER(inode)->dtsize, desc->plus); - spin_lock(&inode->i_lock); - NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATIME; - spin_unlock(&inode->i_lock); desc->page = page; desc->ptr = kmap(page); /* matching kunmap in nfs_do_filldir */ if (desc->error >= 0) { @@ -557,7 +552,7 @@ static int nfs_readdir(struct file *filp, void *dirent, filldir_t filldir) memset(desc, 0, sizeof(*desc)); desc->file = filp; - desc->dir_cookie = &((struct nfs_open_context *)filp->private_data)->dir_cookie; + desc->dir_cookie = &nfs_file_open_context(filp)->dir_cookie; desc->decode = NFS_PROTO(inode)->decode_dirent; desc->plus = NFS_USE_READDIRPLUS(inode); @@ -622,7 +617,7 @@ static loff_t nfs_llseek_dir(struct file *filp, loff_t offset, int origin) } if (offset != filp->f_pos) { filp->f_pos = offset; - ((struct nfs_open_context *)filp->private_data)->dir_cookie = 0; + nfs_file_open_context(filp)->dir_cookie = 0; } out: mutex_unlock(&filp->f_path.dentry->d_inode->i_mutex); @@ -649,34 +644,21 @@ static int nfs_fsync_dir(struct file *filp, struct dentry *dentry, int datasync) */ static int nfs_check_verifier(struct inode *dir, struct dentry *dentry) { - unsigned long verf; - if (IS_ROOT(dentry)) return 1; - verf = (unsigned long)dentry->d_fsdata; - if (nfs_caches_unstable(dir) - || verf != NFS_I(dir)->cache_change_attribute) + if (!nfs_verify_change_attribute(dir, dentry->d_time)) + return 0; + /* Revalidate nfsi->cache_change_attribute before we declare a match */ + if (nfs_revalidate_inode(NFS_SERVER(dir), dir) < 0) + return 0; + if (!nfs_verify_change_attribute(dir, dentry->d_time)) return 0; return 1; } static inline void nfs_set_verifier(struct dentry * dentry, unsigned long verf) { - dentry->d_fsdata = (void *)verf; -} - -static void nfs_refresh_verifier(struct dentry * dentry, unsigned long verf) -{ - nfs_set_verifier(dentry, verf); -} - -/* - * Whenever an NFS operation succeeds, we know that the dentry - * is valid, so we update the revalidation timestamp. - */ -static inline void nfs_renew_times(struct dentry * dentry) -{ - dentry->d_time = jiffies; + dentry->d_time = verf; } /* @@ -758,7 +740,6 @@ static int nfs_lookup_revalidate(struct dentry * dentry, struct nameidata *nd) int error; struct nfs_fh fhandle; struct nfs_fattr fattr; - unsigned long verifier; parent = dget_parent(dentry); lock_kernel(); @@ -766,10 +747,6 @@ static int nfs_lookup_revalidate(struct dentry * dentry, struct nameidata *nd) nfs_inc_stats(dir, NFSIOS_DENTRYREVALIDATE); inode = dentry->d_inode; - /* Revalidate parent directory attribute cache */ - if (nfs_revalidate_inode(NFS_SERVER(dir), dir) < 0) - goto out_zap_parent; - if (!inode) { if (nfs_neg_need_reval(dir, dentry, nd)) goto out_bad; @@ -793,7 +770,6 @@ static int nfs_lookup_revalidate(struct dentry * dentry, struct nameidata *nd) if (NFS_STALE(inode)) goto out_bad; - verifier = nfs_save_change_attribute(dir); error = NFS_PROTO(dir)->lookup(dir, &dentry->d_name, &fhandle, &fattr); if (error) goto out_bad; @@ -802,8 +778,7 @@ static int nfs_lookup_revalidate(struct dentry * dentry, struct nameidata *nd) if ((error = nfs_refresh_inode(inode, &fattr)) != 0) goto out_bad; - nfs_renew_times(dentry); - nfs_refresh_verifier(dentry, verifier); + nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); out_valid: unlock_kernel(); dput(parent); @@ -814,7 +789,7 @@ static int nfs_lookup_revalidate(struct dentry * dentry, struct nameidata *nd) out_zap_parent: nfs_zap_caches(dir); out_bad: - NFS_CACHEINV(dir); + nfs_mark_for_revalidate(dir); if (inode && S_ISDIR(inode->i_mode)) { /* Purge readdir caches. */ nfs_zap_caches(inode); @@ -868,11 +843,9 @@ static void nfs_dentry_iput(struct dentry *dentry, struct inode *inode) if (dentry->d_flags & DCACHE_NFSFS_RENAMED) { lock_kernel(); drop_nlink(inode); - nfs_complete_unlink(dentry); + nfs_complete_unlink(dentry, inode); unlock_kernel(); } - /* When creating a negative dentry, we want to renew d_time */ - nfs_renew_times(dentry); iput(inode); } @@ -896,14 +869,13 @@ int nfs_is_exclusive_create(struct inode *dir, struct nameidata *nd) return (nd->intent.open.flags & O_EXCL) != 0; } -static inline int nfs_reval_fsid(struct vfsmount *mnt, struct inode *dir, - struct nfs_fh *fh, struct nfs_fattr *fattr) +static inline int nfs_reval_fsid(struct inode *dir, const struct nfs_fattr *fattr) { struct nfs_server *server = NFS_SERVER(dir); if (!nfs_fsid_equal(&server->fsid, &fattr->fsid)) - /* Revalidate fsid on root dir */ - return __nfs_revalidate_inode(server, mnt->mnt_root->d_inode); + /* Revalidate fsid using the parent directory */ + return __nfs_revalidate_inode(server, dir); return 0; } @@ -945,7 +917,7 @@ static struct dentry *nfs_lookup(struct inode *dir, struct dentry * dentry, stru res = ERR_PTR(error); goto out_unlock; } - error = nfs_reval_fsid(nd->mnt, dir, &fhandle, &fattr); + error = nfs_reval_fsid(dir, &fattr); if (error < 0) { res = ERR_PTR(error); goto out_unlock; @@ -958,17 +930,10 @@ static struct dentry *nfs_lookup(struct inode *dir, struct dentry * dentry, stru no_entry: res = d_materialise_unique(dentry, inode); if (res != NULL) { - struct dentry *parent; if (IS_ERR(res)) goto out_unlock; - /* Was a directory renamed! */ - parent = dget_parent(res); - if (!IS_ROOT(parent)) - nfs_mark_for_revalidate(parent->d_inode); - dput(parent); dentry = res; } - nfs_renew_times(dentry); nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); out_unlock: unlock_kernel(); @@ -1020,28 +985,16 @@ static struct dentry *nfs_atomic_lookup(struct inode *dir, struct dentry *dentry } dentry->d_op = NFS_PROTO(dir)->dentry_ops; - /* Let vfs_create() deal with O_EXCL */ + /* Let vfs_create() deal with O_EXCL. Instantiate, but don't hash + * the dentry. */ if (nd->intent.open.flags & O_EXCL) { - d_add(dentry, NULL); + d_instantiate(dentry, NULL); goto out; } /* Open the file on the server */ lock_kernel(); - /* Revalidate parent directory attribute cache */ - error = nfs_revalidate_inode(NFS_SERVER(dir), dir); - if (error < 0) { - res = ERR_PTR(error); - unlock_kernel(); - goto out; - } - - if (nd->intent.open.flags & O_CREAT) { - nfs_begin_data_update(dir); - res = nfs4_atomic_open(dir, dentry, nd); - nfs_end_data_update(dir); - } else - res = nfs4_atomic_open(dir, dentry, nd); + res = nfs4_atomic_open(dir, dentry, nd); unlock_kernel(); if (IS_ERR(res)) { error = PTR_ERR(res); @@ -1063,7 +1016,6 @@ static struct dentry *nfs_atomic_lookup(struct inode *dir, struct dentry *dentry } } else if (res != NULL) dentry = res; - nfs_renew_times(dentry); nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); out: return res; @@ -1076,7 +1028,6 @@ static int nfs_open_revalidate(struct dentry *dentry, struct nameidata *nd) struct dentry *parent = NULL; struct inode *inode = dentry->d_inode; struct inode *dir; - unsigned long verifier; int openflags, ret = 0; parent = dget_parent(dentry); @@ -1104,10 +1055,9 @@ static int nfs_open_revalidate(struct dentry *dentry, struct nameidata *nd) * change attribute *before* we do the RPC call. */ lock_kernel(); - verifier = nfs_save_change_attribute(dir); ret = nfs4_open_revalidate(dir, dentry, openflags, nd); - if (!ret) - nfs_refresh_verifier(dentry, verifier); + if (ret == 1) + nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); unlock_kernel(); out: dput(parent); @@ -1133,6 +1083,7 @@ static struct dentry *nfs_readdir_lookup(nfs_readdir_descriptor_t *desc) .len = entry->len, }; struct inode *inode; + unsigned long verf = nfs_save_change_attribute(dir); switch (name.len) { case 2: @@ -1143,6 +1094,14 @@ static struct dentry *nfs_readdir_lookup(nfs_readdir_descriptor_t *desc) if (name.name[0] == '.') return dget(parent); } + + spin_lock(&dir->i_lock); + if (NFS_I(dir)->cache_validity & NFS_INO_INVALID_DATA) { + spin_unlock(&dir->i_lock); + return NULL; + } + spin_unlock(&dir->i_lock); + name.hash = full_name_hash(name.name, name.len); dentry = d_lookup(parent, &name); if (dentry != NULL) { @@ -1162,6 +1121,8 @@ static struct dentry *nfs_readdir_lookup(nfs_readdir_descriptor_t *desc) } if (!desc->plus || !(entry->fattr->valid & NFS_ATTR_FATTR)) return NULL; + if (name.len > NFS_SERVER(dir)->namelen) + return NULL; /* Note: caller is already holding the dir->i_mutex! */ dentry = d_alloc(parent, &name); if (dentry == NULL) @@ -1181,12 +1142,8 @@ static struct dentry *nfs_readdir_lookup(nfs_readdir_descriptor_t *desc) dentry = alias; } - nfs_renew_times(dentry); - nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); - return dentry; out_renew: - nfs_renew_times(dentry); - nfs_refresh_verifier(dentry, nfs_save_change_attribute(dir)); + nfs_set_verifier(dentry, verf); return dentry; } @@ -1196,32 +1153,40 @@ out_renew: int nfs_instantiate(struct dentry *dentry, struct nfs_fh *fhandle, struct nfs_fattr *fattr) { + struct dentry *parent = dget_parent(dentry); + struct inode *dir = parent->d_inode; struct inode *inode; int error = -EACCES; + d_drop(dentry); + /* We may have been initialized further down */ if (dentry->d_inode) - return 0; + goto out; if (fhandle->size == 0) { - struct inode *dir = dentry->d_parent->d_inode; error = NFS_PROTO(dir)->lookup(dir, &dentry->d_name, fhandle, fattr); if (error) - return error; + goto out_error; } + nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); if (!(fattr->valid & NFS_ATTR_FATTR)) { struct nfs_server *server = NFS_SB(dentry->d_sb); error = server->nfs_client->rpc_ops->getattr(server, fhandle, fattr); if (error < 0) - return error; + goto out_error; } inode = nfs_fhget(dentry->d_sb, fhandle, fattr); error = PTR_ERR(inode); if (IS_ERR(inode)) - return error; - d_instantiate(dentry, inode); - if (d_unhashed(dentry)) - d_rehash(dentry); + goto out_error; + d_add(dentry, inode); +out: + dput(parent); return 0; +out_error: + nfs_mark_for_revalidate(dir); + dput(parent); + return error; } /* @@ -1243,17 +1208,13 @@ static int nfs_create(struct inode *dir, struct dentry *dentry, int mode, attr.ia_mode = mode; attr.ia_valid = ATTR_MODE; - if (nd && (nd->flags & LOOKUP_CREATE)) + if ((nd->flags & LOOKUP_CREATE) != 0) open_flags = nd->intent.open.flags; lock_kernel(); - nfs_begin_data_update(dir); error = NFS_PROTO(dir)->create(dir, dentry, &attr, open_flags, nd); - nfs_end_data_update(dir); if (error != 0) goto out_err; - nfs_renew_times(dentry); - nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); unlock_kernel(); return 0; out_err: @@ -1281,13 +1242,9 @@ nfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev) attr.ia_valid = ATTR_MODE; lock_kernel(); - nfs_begin_data_update(dir); status = NFS_PROTO(dir)->mknod(dir, dentry, &attr, rdev); - nfs_end_data_update(dir); if (status != 0) goto out_err; - nfs_renew_times(dentry); - nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); unlock_kernel(); return 0; out_err: @@ -1311,13 +1268,9 @@ static int nfs_mkdir(struct inode *dir, struct dentry *dentry, int mode) attr.ia_mode = mode | S_IFDIR; lock_kernel(); - nfs_begin_data_update(dir); error = NFS_PROTO(dir)->mkdir(dir, dentry, &attr); - nfs_end_data_update(dir); if (error != 0) goto out_err; - nfs_renew_times(dentry); - nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); unlock_kernel(); return 0; out_err: @@ -1334,12 +1287,10 @@ static int nfs_rmdir(struct inode *dir, struct dentry *dentry) dir->i_sb->s_id, dir->i_ino, dentry->d_name.name); lock_kernel(); - nfs_begin_data_update(dir); error = NFS_PROTO(dir)->rmdir(dir, &dentry->d_name); /* Ensure the VFS deletes this inode */ if (error == 0 && dentry->d_inode != NULL) clear_nlink(dentry->d_inode); - nfs_end_data_update(dir); unlock_kernel(); return error; @@ -1348,9 +1299,9 @@ static int nfs_rmdir(struct inode *dir, struct dentry *dentry) static int nfs_sillyrename(struct inode *dir, struct dentry *dentry) { static unsigned int sillycounter; - const int i_inosize = sizeof(dir->i_ino)*2; + const int fileidsize = sizeof(NFS_FILEID(dentry->d_inode))*2; const int countersize = sizeof(sillycounter)*2; - const int slen = sizeof(".nfs") + i_inosize + countersize - 1; + const int slen = sizeof(".nfs")+fileidsize+countersize-1; char silly[slen+1]; struct qstr qsilly; struct dentry *sdentry; @@ -1368,8 +1319,9 @@ static int nfs_sillyrename(struct inode *dir, struct dentry *dentry) if (dentry->d_flags & DCACHE_NFSFS_RENAMED) goto out; - sprintf(silly, ".nfs%*.*lx", - i_inosize, i_inosize, dentry->d_inode->i_ino); + sprintf(silly, ".nfs%*.*Lx", + fileidsize, fileidsize, + (unsigned long long)NFS_FILEID(dentry->d_inode)); /* Return delegation in anticipation of the rename */ nfs_inode_return_delegation(dentry->d_inode); @@ -1396,22 +1348,17 @@ static int nfs_sillyrename(struct inode *dir, struct dentry *dentry) qsilly.name = silly; qsilly.len = strlen(silly); - nfs_begin_data_update(dir); if (dentry->d_inode) { - nfs_begin_data_update(dentry->d_inode); error = NFS_PROTO(dir)->rename(dir, &dentry->d_name, dir, &qsilly); nfs_mark_for_revalidate(dentry->d_inode); - nfs_end_data_update(dentry->d_inode); } else error = NFS_PROTO(dir)->rename(dir, &dentry->d_name, dir, &qsilly); - nfs_end_data_update(dir); if (!error) { - nfs_renew_times(dentry); nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); d_move(dentry, sdentry); - error = nfs_async_unlink(dentry); + error = nfs_async_unlink(dir, dentry); /* If we return 0 we don't unlink */ } dput(sdentry); @@ -1441,19 +1388,15 @@ static int nfs_safe_remove(struct dentry *dentry) goto out; } - nfs_begin_data_update(dir); if (inode != NULL) { nfs_inode_return_delegation(inode); - nfs_begin_data_update(inode); error = NFS_PROTO(dir)->remove(dir, &dentry->d_name); /* The VFS may want to delete this inode */ if (error == 0) drop_nlink(inode); nfs_mark_for_revalidate(inode); - nfs_end_data_update(inode); } else error = NFS_PROTO(dir)->remove(dir, &dentry->d_name); - nfs_end_data_update(dir); out: return error; } @@ -1491,7 +1434,6 @@ static int nfs_unlink(struct inode *dir, struct dentry *dentry) spin_unlock(&dcache_lock); error = nfs_safe_remove(dentry); if (!error) { - nfs_renew_times(dentry); nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); } else if (need_rehash) d_rehash(dentry); @@ -1534,7 +1476,7 @@ static int nfs_symlink(struct inode *dir, struct dentry *dentry, const char *sym lock_kernel(); - page = alloc_page(GFP_KERNEL); + page = alloc_page(GFP_HIGHUSER); if (!page) { unlock_kernel(); return -ENOMEM; @@ -1546,9 +1488,7 @@ static int nfs_symlink(struct inode *dir, struct dentry *dentry, const char *sym memset(kaddr + pathlen, 0, PAGE_SIZE - pathlen); kunmap_atomic(kaddr, KM_USER0); - nfs_begin_data_update(dir); error = NFS_PROTO(dir)->symlink(dir, dentry, page, pathlen, &attr); - nfs_end_data_update(dir); if (error != 0) { dfprintk(VFS, "NFS: symlink(%s/%ld, %s, %s) error %d\n", dir->i_sb->s_id, dir->i_ino, @@ -1588,15 +1528,11 @@ nfs_link(struct dentry *old_dentry, struct inode *dir, struct dentry *dentry) dentry->d_parent->d_name.name, dentry->d_name.name); lock_kernel(); - nfs_begin_data_update(dir); - nfs_begin_data_update(inode); error = NFS_PROTO(dir)->link(inode, dir, &dentry->d_name); if (error == 0) { atomic_inc(&inode->i_count); d_instantiate(dentry, inode); } - nfs_end_data_update(inode); - nfs_end_data_update(dir); unlock_kernel(); return error; } @@ -1699,22 +1635,16 @@ go_ahead: d_delete(new_dentry); } - nfs_begin_data_update(old_dir); - nfs_begin_data_update(new_dir); - nfs_begin_data_update(old_inode); error = NFS_PROTO(old_dir)->rename(old_dir, &old_dentry->d_name, new_dir, &new_dentry->d_name); nfs_mark_for_revalidate(old_inode); - nfs_end_data_update(old_inode); - nfs_end_data_update(new_dir); - nfs_end_data_update(old_dir); out: if (rehash) d_rehash(rehash); if (!error) { d_move(old_dentry, new_dentry); - nfs_renew_times(new_dentry); - nfs_refresh_verifier(new_dentry, nfs_save_change_attribute(new_dir)); + nfs_set_verifier(new_dentry, + nfs_save_change_attribute(new_dir)); } /* new dentry created? */ @@ -1743,8 +1673,8 @@ int nfs_access_cache_shrinker(int nr_to_scan, gfp_t gfp_mask) struct nfs_inode *nfsi; struct nfs_access_entry *cache; - spin_lock(&nfs_access_lru_lock); restart: + spin_lock(&nfs_access_lru_lock); list_for_each_entry(nfsi, &nfs_access_lru_list, access_cache_inode_lru) { struct inode *inode; @@ -1769,6 +1699,7 @@ remove_lru_entry: clear_bit(NFS_INO_ACL_LRU_SET, &nfsi->flags); } spin_unlock(&inode->i_lock); + spin_unlock(&nfs_access_lru_lock); iput(inode); goto restart; } @@ -1839,7 +1770,7 @@ static struct nfs_access_entry *nfs_access_search_rbtree(struct inode *inode, st return NULL; } -int nfs_access_get_cached(struct inode *inode, struct rpc_cred *cred, struct nfs_access_entry *res) +static int nfs_access_get_cached(struct inode *inode, struct rpc_cred *cred, struct nfs_access_entry *res) { struct nfs_inode *nfsi = NFS_I(inode); struct nfs_access_entry *cache; @@ -1851,7 +1782,7 @@ int nfs_access_get_cached(struct inode *inode, struct rpc_cred *cred, struct nfs cache = nfs_access_search_rbtree(inode, cred); if (cache == NULL) goto out; - if (time_after(jiffies, cache->jiffies + NFS_ATTRTIMEO(inode))) + if (!time_in_range(jiffies, cache->jiffies, cache->jiffies + NFS_ATTRTIMEO(inode))) goto out_stale; res->jiffies = cache->jiffies; res->cred = cache->cred; @@ -1906,7 +1837,7 @@ found: nfs_access_free_entry(entry); } -void nfs_access_add_cache(struct inode *inode, struct nfs_access_entry *set) +static void nfs_access_add_cache(struct inode *inode, struct nfs_access_entry *set) { struct nfs_access_entry *cache = kmalloc(sizeof(*cache), GFP_KERNEL); if (cache == NULL) @@ -1954,6 +1885,24 @@ out: return -EACCES; } +static int nfs_open_permission_mask(int openflags) +{ + int mask = 0; + + if (openflags & FMODE_READ) + mask |= MAY_READ; + if (openflags & FMODE_WRITE) + mask |= MAY_WRITE; + if (openflags & FMODE_EXEC) + mask |= MAY_EXEC; + return mask; +} + +int nfs_may_open(struct inode *inode, struct rpc_cred *cred, int openflags) +{ + return nfs_do_access(inode, cred, nfs_open_permission_mask(openflags)); +} + int nfs_permission(struct inode *inode, int mask, struct nameidata *nd) { struct rpc_cred *cred;