summaryrefslogtreecommitdiffstats
path: root/libglusterfsclient/src/libglusterfsclient-dentry.c
diff options
context:
space:
mode:
Diffstat (limited to 'libglusterfsclient/src/libglusterfsclient-dentry.c')
-rw-r--r--libglusterfsclient/src/libglusterfsclient-dentry.c404
1 files changed, 0 insertions, 404 deletions
diff --git a/libglusterfsclient/src/libglusterfsclient-dentry.c b/libglusterfsclient/src/libglusterfsclient-dentry.c
deleted file mode 100644
index 3fa5f6e1e74..00000000000
--- a/libglusterfsclient/src/libglusterfsclient-dentry.c
+++ /dev/null
@@ -1,404 +0,0 @@
-/*
- Copyright (c) 2008-2012 Red Hat, Inc. <http://www.redhat.com>
- This file is part of GlusterFS.
-
- This file is licensed to you under your choice of the GNU Lesser
- General Public License, version 3 or any later version (LGPLv3 or
- later), or the GNU General Public License, version 2 (GPLv2), in all
- cases as published by the Free Software Foundation.
-*/
-
-#include "libglusterfsclient.h"
-#include "libglusterfsclient-internals.h"
-#include <libgen.h>
-
-#define LIBGLUSTERFS_CLIENT_DENTRY_LOC_PREPARE(_new_loc, _loc, _parent, \
- _resolved) do { \
- size_t pathlen = 0; \
- size_t resolvedlen = 0; \
- char *path = NULL; \
- int pad = 0; \
- pathlen = strlen (_loc->path) + 1; \
- path = CALLOC (1, pathlen); \
- _new_loc.parent = _parent; \
- resolvedlen = strlen (_resolved); \
- strncpy (path, _resolved, resolvedlen); \
- if (resolvedlen == 1) /* only root resolved */ \
- pad = 0; \
- else { \
- pad = 1; \
- path[resolvedlen] = '/'; \
- } \
- strcpy_till (path + resolvedlen + pad, \
- loc->path + resolvedlen + pad, '/'); \
- _new_loc.path = path; \
- _new_loc.name = strrchr (path, '/'); \
- if (_new_loc.name) \
- _new_loc.name++; \
- }while (0);
-
-
-/* strcpy_till - copy @dname to @dest, until 'delim' is encountered in @dest
- * @dest - destination string
- * @dname - source string
- * @delim - delimiter character
- *
- * return - NULL is returned if '0' is encountered in @dname, otherwise returns
- * a pointer to remaining string begining in @dest.
- */
-static char *
-strcpy_till (char *dest, const char *dname, char delim)
-{
- char *src = NULL;
- int idx = 0;
- char *ret = NULL;
-
- src = (char *)dname;
- while (src[idx] && (src[idx] != delim)) {
- dest[idx] = src[idx];
- idx++;
- }
-
- dest[idx] = 0;
-
- if (src[idx] == 0)
- ret = NULL;
- else
- ret = &(src[idx]);
-
- return ret;
-}
-
-/* __libgf_client_path_to_parenti - derive parent inode for @path. if immediate
- * parent is not available in the dentry cache, return nearest
- * available parent inode and set @reslv to the path of
- * the returned directory.
- *
- * @itable - inode table
- * @path - path whose parent has to be looked up.
- * @reslv - if immediate parent is not available, reslv will be set to path of the
- * resolved parent.
- *
- * return - should never return NULL. should at least return '/' inode.
- */
-static inode_t *
-__libgf_client_path_to_parenti (libglusterfs_client_ctx_t *ctx,
- inode_table_t *itable, const char *path,
- char **reslv)
-{
- char *resolved_till = NULL;
- char *strtokptr = NULL;
- char *component = NULL;
- char *next_component = NULL;
- char *pathdup = NULL;
- inode_t *curr = NULL;
- inode_t *parent = NULL;
- size_t pathlen = 0;
- loc_t rootloc = {0, };
- int ret = -1;
-
- pathlen = STRLEN_0 (path);
- resolved_till = CALLOC (1, pathlen);
-
- GF_VALIDATE_OR_GOTO("libglusterfsclient-dentry", resolved_till, out);
- pathdup = strdup (path);
- GF_VALIDATE_OR_GOTO("libglusterfsclient-dentry", pathdup, out);
-
- parent = inode_ref (itable->root);
- /* If the root inode's is outdated, send a revalidate on it.
- * A revalidate on root inode also reduces the window in which an
- * op will fail over distribute because the layout of the root
- * directory did not get constructed when we sent the lookup on
- * root in glusterfs_init. That can happen when not all children of a
- * distribute volume were up at the time of glusterfs_init.
- */
- if (!libgf_is_iattr_cache_valid (ctx, parent, NULL,
- LIBGF_VALIDATE_LOOKUP)) {
- libgf_client_loc_fill (&rootloc, ctx, 1, 0, "/");
- ret = libgf_client_lookup (ctx, &rootloc, NULL, NULL, NULL);
- if (ret == -1) {
- gf_log ("libglusterfsclient-dentry", GF_LOG_ERROR,
- "Root inode revalidation failed");
- inode_unref (parent);
- parent = NULL;
- goto out;
- }
- libgf_client_loc_wipe (&rootloc);
- }
-
- curr = NULL;
-
- component = strtok_r (pathdup, "/", &strtokptr);
-
- while (component) {
- curr = inode_search (itable, parent->ino, component);
- if (!curr) {
- break;
- }
- if (!libgf_is_iattr_cache_valid (ctx, curr, NULL,
- LIBGF_VALIDATE_LOOKUP))
- break;
-
- /* It is OK to append the component even if it is the
- last component in the path, because, if 'next_component'
- returns NULL, @parent will remain the same and
- @resolved_till will not be sent back
- */
- strcat (resolved_till, "/");
- strcat (resolved_till, component);
-
- next_component = strtok_r (NULL, "/", &strtokptr);
-
- if (next_component) {
- inode_unref (parent);
- parent = curr;
- curr = NULL;
- } else {
- /* will break */
- inode_unref (curr);
- }
-
- component = next_component;
- }
-
- if (resolved_till[0] == '\0') {
- strcat (resolved_till, "/");
- }
-
- free (pathdup);
-
- if (reslv) {
- *reslv = resolved_till;
- } else {
- FREE (resolved_till);
- }
-
-out:
- return parent;
-}
-
-static inline void
-libgf_client_update_resolved (const char *path, char *resolved)
-{
- int32_t pathlen = 0;
- char *tmp = NULL, *dest = NULL, *dname = NULL;
- char append_slash = 0;
-
- pathlen = strlen (resolved);
- tmp = (char *)(resolved + pathlen);
- if (*((char *) (resolved + pathlen - 1)) != '/') {
- tmp[0] = '/';
- append_slash = 1;
- }
-
- if (append_slash) {
- dest = tmp + 1;
- } else {
- dest = tmp;
- }
-
- if (*((char *) path + pathlen) == '/') {
- dname = (char *) path + pathlen + 1;
- } else {
- dname = (char *) path + pathlen;
- }
-
- strcpy_till (dest, dname, '/');
-}
-
-/* __do_path_resolve - resolve @loc->path into @loc->inode and @loc->parent. also
- * update the dentry cache
- *
- * @loc - loc to resolve.
- * @ctx - libglusterfsclient context
- * @lookup_basename - flag whether to lookup basename(loc->path)
- *
- * return - 0 on success
- * -1 on failure
- *
- */
-static int32_t
-__do_path_resolve (loc_t *loc, libglusterfs_client_ctx_t *ctx,
- char lookup_basename)
-{
- int32_t op_ret = -1;
- char *resolved = NULL;
- inode_t *parent = NULL, *inode = NULL;
- dentry_t *dentry = NULL;
- loc_t new_loc = {0, };
- char *pathname = NULL, *directory = NULL;
- char *file = NULL;
-
- parent = loc->parent;
- if (parent) {
- inode_ref (parent);
- gf_log ("libglusterfsclient-dentry", GF_LOG_DEBUG,
- "loc->parent(%"PRId64") already present. sending "
- "lookup for %"PRId64"/%s", parent->ino, parent->ino,
- loc->path);
- resolved = strdup (loc->path);
- resolved = dirname (resolved);
- } else {
- parent = __libgf_client_path_to_parenti (ctx, ctx->itable,
- loc->path, &resolved);
- }
-
- if (parent == NULL) {
- /* fire in the bush.. run! run!! run!!! */
- gf_log ("libglusterfsclient-dentry",
- GF_LOG_CRITICAL,
- "failed to get parent inode number");
- op_ret = -1;
- goto out;
- }
-
- gf_log ("libglusterfsclient-dentry",
- GF_LOG_DEBUG,
- "resolved path(%s) till %"PRId64"(%s). "
- "sending lookup for remaining path",
- loc->path, parent->ino, resolved);
-
- pathname = strdup (loc->path);
- directory = dirname (pathname);
- pathname = NULL;
-
- while (strcmp (resolved, directory) != 0)
- {
- dentry = NULL;
-
- LIBGLUSTERFS_CLIENT_DENTRY_LOC_PREPARE (new_loc, loc, parent,
- resolved);
-
- if (pathname) {
- free (pathname);
- pathname = NULL;
- }
-
- pathname = strdup (new_loc.path);
- file = basename (pathname);
-
- new_loc.inode = inode_search (ctx->itable, parent->ino, file);
- if (new_loc.inode) {
- if (libgf_is_iattr_cache_valid (ctx, new_loc.inode,
- NULL,
- LIBGF_VALIDATE_LOOKUP))
- dentry = dentry_search_for_inode (new_loc.inode,
- parent->ino,
- file);
- }
-
- if (dentry == NULL) {
- op_ret = libgf_client_lookup (ctx, &new_loc, NULL, NULL,
- 0);
- if (op_ret == -1) {
- inode_ref (new_loc.parent);
- libgf_client_loc_wipe (&new_loc);
- goto out;
- }
- }
-
- parent = inode_ref (new_loc.inode);
- libgf_client_loc_wipe (&new_loc);
-
- libgf_client_update_resolved (loc->path, resolved);
- }
-
- if (pathname) {
- free (pathname);
- pathname = NULL;
- }
-
- if (lookup_basename) {
- pathname = strdup (loc->path);
- file = basename (pathname);
-
- inode = inode_search (ctx->itable, parent->ino, file);
- if (!inode) {
- libgf_client_loc_fill (&new_loc, ctx, 0, parent->ino,
- file);
-
- op_ret = libgf_client_lookup (ctx, &new_loc, NULL, NULL,
- 0);
- if (op_ret == -1) {
- libgf_client_loc_wipe (&new_loc);
- goto out;
- }
-
- inode = inode_ref (new_loc.inode);
- libgf_client_loc_wipe (&new_loc);
- }
- }
-
- op_ret = 0;
-out:
- loc->inode = inode;
- loc->parent = parent;
-
- FREE (resolved);
- if (pathname) {
- FREE (pathname);
- }
-
- if (directory) {
- FREE (directory);
- }
-
- return op_ret;
-}
-
-
-/* resolves loc->path to loc->parent and loc->inode */
-int32_t
-libgf_client_path_lookup (loc_t *loc,
- libglusterfs_client_ctx_t *ctx,
- char lookup_basename)
-{
- char *pathname = NULL;
- char *directory = NULL;
- inode_t *inode = NULL;
- inode_t *parent = NULL;
- int32_t op_ret = 0;
-
- pathname = strdup (loc->path);
- directory = dirname (pathname);
- parent = inode_from_path (ctx->itable, directory);
-
- if (parent != NULL) {
- loc->parent = parent;
-
- if (!lookup_basename) {
- gf_log ("libglusterfsclient",
- GF_LOG_DEBUG,
- "resolved dirname(%s) to %"PRId64,
- loc->path, parent->ino);
- goto out;
- } else {
- inode = inode_from_path (ctx->itable, loc->path);
- if (inode != NULL) {
- gf_log ("libglusterfsclient",
- GF_LOG_DEBUG,
- "resolved path(%s) to %"PRId64"/%"PRId64,
- loc->path, parent->ino, inode->ino);
- loc->inode = inode;
- goto out;
- }
- }
- }
-
- if (parent) {
- inode_unref (parent);
- } else if (inode) {
- inode_unref (inode);
- gf_log ("libglusterfsclient",
- GF_LOG_ERROR,
- "undesired behaviour. inode(%"PRId64") for %s "
- "exists without parent (%s)",
- inode->ino, loc->path, directory);
- }
- op_ret = __do_path_resolve (loc, ctx, lookup_basename);
-out:
- if (pathname)
- free (pathname);
-
- return op_ret;
-}
generated by cgit (git 2.34.1) at 2025-11-04 08:23:04 +0000