diff options
author | Martin Brandenburg <martin@omnibond.com> | 2016-03-17 20:15:16 +0100 |
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committer | Mike Marshall <hubcap@omnibond.com> | 2016-03-23 22:36:15 +0100 |
commit | 5859d77e56e470ba16960befcd948c97a6f62102 (patch) | |
tree | ba4c3743738156281a9f43268c787b86e01b2a80 /fs/orangefs/orangefs-utils.c | |
parent | orangefs: use new getattr in inode getattr and permission (diff) | |
download | linux-5859d77e56e470ba16960befcd948c97a6f62102.tar.xz linux-5859d77e56e470ba16960befcd948c97a6f62102.zip |
orangefs: use new getattr for revalidate and remove old getattr
Signed-off-by: Martin Brandenburg <martin@omnibond.com>
Signed-off-by: Mike Marshall <hubcap@omnibond.com>
Diffstat (limited to 'fs/orangefs/orangefs-utils.c')
-rw-r--r-- | fs/orangefs/orangefs-utils.c | 367 |
1 files changed, 46 insertions, 321 deletions
diff --git a/fs/orangefs/orangefs-utils.c b/fs/orangefs/orangefs-utils.c index 59c51e2c5a71..6643a6a87fa1 100644 --- a/fs/orangefs/orangefs-utils.c +++ b/fs/orangefs/orangefs-utils.c @@ -129,141 +129,6 @@ static int orangefs_inode_perms(struct ORANGEFS_sys_attr_s *attrs) return perm_mode; } -/* NOTE: symname is ignored unless the inode is a sym link */ -static int copy_attributes_to_inode(struct inode *inode, - struct ORANGEFS_sys_attr_s *attrs, - char *symname) -{ - int ret = -1; - struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode); - loff_t inode_size = 0; - loff_t rounded_up_size = 0; - - - /* - * arbitrarily set the inode block size; FIXME: we need to - * resolve the difference between the reported inode blocksize - * and the PAGE_CACHE_SIZE, since our block count will always - * be wrong. - * - * For now, we're setting the block count to be the proper - * number assuming the block size is 512 bytes, and the size is - * rounded up to the nearest 4K. This is apparently required - * to get proper size reports from the 'du' shell utility. - * - * changing the inode->i_blkbits to something other than - * PAGE_CACHE_SHIFT breaks mmap/execution as we depend on that. - */ - gossip_debug(GOSSIP_UTILS_DEBUG, - "attrs->mask = %x (objtype = %s)\n", - attrs->mask, - attrs->objtype == ORANGEFS_TYPE_METAFILE ? "file" : - attrs->objtype == ORANGEFS_TYPE_DIRECTORY ? "directory" : - attrs->objtype == ORANGEFS_TYPE_SYMLINK ? "symlink" : - "invalid/unknown"); - - switch (attrs->objtype) { - case ORANGEFS_TYPE_METAFILE: - inode->i_flags = orangefs_inode_flags(attrs); - if (attrs->mask & ORANGEFS_ATTR_SYS_SIZE) { - inode_size = (loff_t) attrs->size; - rounded_up_size = - (inode_size + (4096 - (inode_size % 4096))); - - spin_lock(&inode->i_lock); - inode->i_bytes = inode_size; - inode->i_blocks = - (unsigned long)(rounded_up_size / 512); - spin_unlock(&inode->i_lock); - - /* - * NOTE: make sure all the places we're called - * from have the inode->i_sem lock. We're fine - * in 99% of the cases since we're mostly - * called from a lookup. - */ - inode->i_size = inode_size; - } - break; - case ORANGEFS_TYPE_SYMLINK: - if (symname != NULL) { - inode->i_size = (loff_t) strlen(symname); - break; - } - /*FALLTHRU*/ - default: - inode->i_size = PAGE_CACHE_SIZE; - - spin_lock(&inode->i_lock); - inode_set_bytes(inode, inode->i_size); - spin_unlock(&inode->i_lock); - break; - } - - inode->i_uid = make_kuid(&init_user_ns, attrs->owner); - inode->i_gid = make_kgid(&init_user_ns, attrs->group); - inode->i_atime.tv_sec = (time64_t) attrs->atime; - inode->i_mtime.tv_sec = (time64_t) attrs->mtime; - inode->i_ctime.tv_sec = (time64_t) attrs->ctime; - inode->i_atime.tv_nsec = 0; - inode->i_mtime.tv_nsec = 0; - inode->i_ctime.tv_nsec = 0; - - inode->i_mode = orangefs_inode_perms(attrs); - - if (is_root_handle(inode)) { - /* special case: mark the root inode as sticky */ - inode->i_mode |= S_ISVTX; - gossip_debug(GOSSIP_UTILS_DEBUG, - "Marking inode %pU as sticky\n", - get_khandle_from_ino(inode)); - } - - switch (attrs->objtype) { - case ORANGEFS_TYPE_METAFILE: - inode->i_mode |= S_IFREG; - ret = 0; - break; - case ORANGEFS_TYPE_DIRECTORY: - inode->i_mode |= S_IFDIR; - /* NOTE: we have no good way to keep nlink consistent - * for directories across clients; keep constant at 1. - * Why 1? If we go with 2, then find(1) gets confused - * and won't work properly withouth the -noleaf option - */ - set_nlink(inode, 1); - ret = 0; - break; - case ORANGEFS_TYPE_SYMLINK: - inode->i_mode |= S_IFLNK; - - /* copy link target to inode private data */ - if (orangefs_inode && symname) { - strncpy(orangefs_inode->link_target, - symname, - ORANGEFS_NAME_MAX); - gossip_debug(GOSSIP_UTILS_DEBUG, - "Copied attr link target %s\n", - orangefs_inode->link_target); - } - gossip_debug(GOSSIP_UTILS_DEBUG, - "symlink mode %o\n", - inode->i_mode); - ret = 0; - break; - default: - gossip_err("orangefs: copy_attributes_to_inode: got invalid attribute type %x\n", - attrs->objtype); - } - - gossip_debug(GOSSIP_UTILS_DEBUG, - "orangefs: copy_attributes_to_inode: setting i_mode to %o, i_size to %lu\n", - inode->i_mode, - (unsigned long)i_size_read(inode)); - - return ret; -} - /* * NOTE: in kernel land, we never use the sys_attr->link_target for * anything, so don't bother copying it into the sys_attr object here. @@ -351,192 +216,6 @@ static inline int copy_attributes_from_inode(struct inode *inode, return 0; } -static int compare_attributes_to_inode(struct inode *inode, - struct ORANGEFS_sys_attr_s *attrs, - char *symname, - int mask) -{ - struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode); - loff_t inode_size, rounded_up_size; - - /* Much of what happens below relies on the type being around. */ - if (!(mask & ORANGEFS_ATTR_SYS_TYPE)) - return 0; - - if (attrs->objtype == ORANGEFS_TYPE_METAFILE && - inode->i_flags != orangefs_inode_flags(attrs)) - return 0; - - /* Compare file size. */ - - switch (attrs->objtype) { - case ORANGEFS_TYPE_METAFILE: - if (mask & ORANGEFS_ATTR_SYS_SIZE) { - inode_size = attrs->size; - rounded_up_size = inode_size + - (4096 - (inode_size % 4096)); - if (inode->i_bytes != inode_size || - inode->i_blocks != rounded_up_size/512) - return 0; - } - break; - case ORANGEFS_TYPE_SYMLINK: - if (mask & ORANGEFS_ATTR_SYS_SIZE) - if (symname && strlen(symname) != inode->i_size) - return 0; - break; - default: - if (inode->i_size != PAGE_CACHE_SIZE && - inode_get_bytes(inode) != PAGE_CACHE_SIZE) - return 0; - } - - /* Compare general attributes. */ - - if (mask & ORANGEFS_ATTR_SYS_UID && - !uid_eq(inode->i_uid, make_kuid(&init_user_ns, attrs->owner))) - return 0; - if (mask & ORANGEFS_ATTR_SYS_GID && - !gid_eq(inode->i_gid, make_kgid(&init_user_ns, attrs->group))) - return 0; - if (mask & ORANGEFS_ATTR_SYS_ATIME && - inode->i_atime.tv_sec != attrs->atime) - return 0; - if (mask & ORANGEFS_ATTR_SYS_MTIME && - inode->i_atime.tv_sec != attrs->mtime) - return 0; - if (mask & ORANGEFS_ATTR_SYS_CTIME && - inode->i_atime.tv_sec != attrs->ctime) - return 0; - if (inode->i_atime.tv_nsec != 0 || - inode->i_mtime.tv_nsec != 0 || - inode->i_ctime.tv_nsec != 0) - return 0; - - if (mask & ORANGEFS_ATTR_SYS_PERM && - (inode->i_mode & ~(S_ISVTX|S_IFREG|S_IFDIR|S_IFLNK)) != - orangefs_inode_perms(attrs)) - return 0; - - if (is_root_handle(inode)) - if (!(inode->i_mode & S_ISVTX)) - return 0; - - /* Compare file type. */ - - switch (attrs->objtype) { - case ORANGEFS_TYPE_METAFILE: - if (!S_ISREG(inode->i_mode)) - return 0; - break; - case ORANGEFS_TYPE_DIRECTORY: - if (!S_ISDIR(inode->i_mode)) - return 0; - if (inode->i_nlink != 1) - return 0; - break; - case ORANGEFS_TYPE_SYMLINK: - if (!S_ISLNK(inode->i_mode)) - return 0; - if (orangefs_inode && symname && - mask & ORANGEFS_ATTR_SYS_LNK_TARGET) - if (strcmp(orangefs_inode->link_target, symname)) - return 0; - break; - default: - gossip_err("orangefs: compare_attributes_to_inode: got invalid attribute type %x\n", - attrs->objtype); - - } - - return 1; -} - -/* - * Issues a orangefs getattr request and fills in the appropriate inode - * attributes if successful. When check is 0, returns 0 on success and -errno - * otherwise. When check is 1, returns 1 on success where the inode is valid - * and 0 on success where the inode is stale and -errno otherwise. - */ -int orangefs_inode_old_getattr(struct inode *inode, __u32 getattr_mask, - int check) -{ - struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode); - struct orangefs_kernel_op_s *new_op; - int ret = -EINVAL; - - gossip_debug(GOSSIP_UTILS_DEBUG, - "%s: called on inode %pU\n", - __func__, - get_khandle_from_ino(inode)); - - new_op = op_alloc(ORANGEFS_VFS_OP_GETATTR); - if (!new_op) - return -ENOMEM; - new_op->upcall.req.getattr.refn = orangefs_inode->refn; - new_op->upcall.req.getattr.mask = getattr_mask; - - ret = service_operation(new_op, __func__, - get_interruptible_flag(inode)); - if (ret != 0) - goto out; - - if (check) { - ret = compare_attributes_to_inode(inode, - &new_op->downcall.resp.getattr.attributes, - new_op->downcall.resp.getattr.link_target, - getattr_mask); - - if (new_op->downcall.resp.getattr.attributes.objtype == - ORANGEFS_TYPE_METAFILE) { - if (orangefs_inode->blksize != - new_op->downcall.resp.getattr.attributes.blksize) - ret = 0; - } else { - if (orangefs_inode->blksize != 1 << inode->i_blkbits) - ret = 0; - } - } else { - if (copy_attributes_to_inode(inode, - &new_op->downcall.resp.getattr.attributes, - new_op->downcall.resp.getattr.link_target)) { - gossip_err("%s: failed to copy attributes\n", __func__); - ret = -ENOENT; - goto out; - } - - /* - * Store blksize in orangefs specific part of inode structure; - * we are only going to use this to report to stat to make sure - * it doesn't perturb any inode related code paths. - */ - if (new_op->downcall.resp.getattr.attributes.objtype == - ORANGEFS_TYPE_METAFILE) { - orangefs_inode->blksize = new_op->downcall.resp. - getattr.attributes.blksize; - } else { - /* - * mimic behavior of generic_fillattr() for other file - * types. - */ - orangefs_inode->blksize = (1 << inode->i_blkbits); - - } - } - -out: - gossip_debug(GOSSIP_UTILS_DEBUG, - "Getattr on handle %pU, " - "fsid %d\n (inode ct = %d) returned %d\n", - &orangefs_inode->refn.khandle, - orangefs_inode->refn.fs_id, - (int)atomic_read(&inode->i_count), - ret); - - op_release(new_op); - return ret; -} - static int orangefs_inode_type(enum orangefs_ds_type objtype) { if (objtype == ORANGEFS_TYPE_METAFILE) @@ -655,6 +334,52 @@ out: return ret; } +int orangefs_inode_check_changed(struct inode *inode) +{ + struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode); + struct orangefs_kernel_op_s *new_op; + int ret; + + gossip_debug(GOSSIP_UTILS_DEBUG, "%s: called on inode %pU\n", __func__, + get_khandle_from_ino(inode)); + + new_op = op_alloc(ORANGEFS_VFS_OP_GETATTR); + if (!new_op) + return -ENOMEM; + new_op->upcall.req.getattr.refn = orangefs_inode->refn; + new_op->upcall.req.getattr.mask = ORANGEFS_ATTR_SYS_TYPE | + ORANGEFS_ATTR_SYS_LNK_TARGET; + + ret = service_operation(new_op, __func__, + get_interruptible_flag(inode)); + if (ret != 0) + goto out; + + ret = orangefs_inode_type(new_op-> + downcall.resp.getattr.attributes.objtype); + /* + * If the inode type or symlink target have changed then this + * inode is stale. + */ + if (ret == -1 || !(inode->i_mode & ret)) { + orangefs_make_bad_inode(inode); + ret = 1; + goto out; + } + if (ret == S_IFLNK && strncmp(orangefs_inode->link_target, + new_op->downcall.resp.getattr.link_target, + ORANGEFS_NAME_MAX)) { + orangefs_make_bad_inode(inode); + ret = 1; + goto out; + } + + ret = 0; +out: + op_release(new_op); + return ret; +} + /* * issues a orangefs setattr request to make sure the new attribute values * take effect if successful. returns 0 on success; -errno otherwise |