diff options
Diffstat (limited to 'xlators/nfs/server/src/nfs-common.c')
| -rw-r--r-- | xlators/nfs/server/src/nfs-common.c | 465 |
1 files changed, 465 insertions, 0 deletions
diff --git a/xlators/nfs/server/src/nfs-common.c b/xlators/nfs/server/src/nfs-common.c new file mode 100644 index 000000000..f74396ee8 --- /dev/null +++ b/xlators/nfs/server/src/nfs-common.c @@ -0,0 +1,465 @@ +/* + Copyright (c) 2010-2011 Gluster, Inc. <http://www.gluster.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. +*/ + +#ifndef _CONFIG_H +#define _CONFIG_H +#include "config.h" +#endif + +#include "rpcsvc.h" +#include "dict.h" +#include "xlator.h" +#include "xdr-nfs3.h" +#include "msg-nfs3.h" +#include "iobuf.h" +#include "nfs-common.h" +#include "nfs-fops.h" +#include "nfs-mem-types.h" +#include "rpcsvc.h" +#include "iatt.h" + +#include <libgen.h> + +xlator_t * +nfs_xlid_to_xlator (xlator_list_t *cl, uint8_t xlid) +{ + xlator_t *xl = NULL; + uint8_t id = 0; + + while (id <= xlid) { + if (!cl) { + xl = NULL; + break; + } + + xl = cl->xlator; + cl = cl->next; + id++; + } + + return xl; +} + + +xlator_t * +nfs_path_to_xlator (xlator_list_t *cl, char *path) +{ + return NULL; +} + + +uint16_t +nfs_xlator_to_xlid (xlator_list_t *cl, xlator_t *xl) +{ + uint16_t xlid = 0; + + if ((!cl) || (!xl)) + return 0; + + while (cl) { + if (xl == cl->xlator) + break; + cl = cl->next; + ++xlid; + } + + return xlid; +} + + +xlator_t * +nfs_mntpath_to_xlator (xlator_list_t *cl, char *path) +{ + char volname[MNTPATHLEN]; + char *volptr = NULL; + size_t pathlen; + xlator_t *targetxl = NULL; + + if ((!cl) || (!path)) + return NULL; + + strncpy (volname, path, MNTPATHLEN); + pathlen = strlen (volname); + gf_log (GF_NFS, GF_LOG_TRACE, "Subvolume search: %s", path); + if (volname[0] == '/') + volptr = &volname[1]; + else + volptr = &volname[0]; + + if (pathlen && volname[pathlen - 1] == '/') + volname[pathlen - 1] = '\0'; + + while (cl) { + if (strcmp (volptr, cl->xlator->name) == 0) { + targetxl = cl->xlator; + break; + } + + cl = cl->next; + } + + return targetxl; + +} + + +/* Returns 1 if the stat seems to be filled with zeroes. */ +int +nfs_zero_filled_stat (struct iatt *buf) +{ + if (!buf) + return 1; + + /* Do not use st_dev because it is transformed to store the xlator id + * in place of the device number. Do not use st_ino because by this time + * we've already mapped the root ino to 1 so it is not guaranteed to be + * 0. + */ + if ((buf->ia_nlink == 0) && (buf->ia_ctime == 0)) + return 1; + + return 0; +} + + +void +nfs_loc_wipe (loc_t *loc) +{ + loc_wipe (loc); +} + + +int +nfs_loc_copy (loc_t *dst, loc_t *src) +{ + int ret = -1; + + ret = loc_copy (dst, src); + + return ret; +} + + +int +nfs_loc_fill (loc_t *loc, inode_t *inode, inode_t *parent, char *path) +{ + int ret = -EFAULT; + + if (!loc) + return ret; + + if (inode) { + loc->inode = inode_ref (inode); + if (!uuid_is_null (inode->gfid)) + uuid_copy (loc->gfid, inode->gfid); + } + + if (parent) + loc->parent = inode_ref (parent); + + if (path) { + loc->path = gf_strdup (path); + if (!loc->path) { + gf_log (GF_NFS, GF_LOG_ERROR, "strdup failed"); + goto loc_wipe; + } + loc->name = strrchr (loc->path, '/'); + if (loc->name) + loc->name++; + } + + ret = 0; +loc_wipe: + if (ret < 0) + nfs_loc_wipe (loc); + + return ret; +} + + +int +nfs_inode_loc_fill (inode_t *inode, loc_t *loc, int how) +{ + char *resolvedpath = NULL; + inode_t *parent = NULL; + int ret = -EFAULT; + + if ((!inode) || (!loc)) + return ret; + + /* If gfid is not null, then the inode is already linked to + * the inode table, and not a newly created one. For newly + * created inode, inode_path returns null gfid as the path. + */ + if (!uuid_is_null (inode->gfid)) { + ret = inode_path (inode, NULL, &resolvedpath); + if (ret < 0) { + gf_log (GF_NFS, GF_LOG_ERROR, "path resolution failed " + "%s", resolvedpath); + goto err; + } + } + + if (resolvedpath == NULL) { + char tmp_path[GFID_STR_PFX_LEN + 1] = {0,}; + snprintf (tmp_path, sizeof (tmp_path), "<gfid:%s>", + uuid_utoa (loc->gfid)); + resolvedpath = gf_strdup (tmp_path); + } else { + parent = inode_parent (inode, loc->pargfid, NULL); + } + + ret = nfs_loc_fill (loc, inode, parent, resolvedpath); + if (ret < 0) { + gf_log (GF_NFS, GF_LOG_ERROR, "loc fill resolution failed %s", + resolvedpath); + goto err; + } + + ret = 0; +err: + if (parent) + inode_unref (parent); + + GF_FREE (resolvedpath); + + return ret; +} + +int +nfs_gfid_loc_fill (inode_table_t *itable, uuid_t gfid, loc_t *loc, int how) +{ + int ret = -EFAULT; + inode_t *inode = NULL; + + if (!loc) + return ret; + + inode = inode_find (itable, gfid); + if (!inode) { + gf_log (GF_NFS, GF_LOG_TRACE, "Inode not found in itable, will try to create one."); + if (how == NFS_RESOLVE_CREATE) { + gf_log (GF_NFS, GF_LOG_TRACE, "Inode needs to be created."); + inode = inode_new (itable); + if (!inode) { + gf_log (GF_NFS, GF_LOG_ERROR, "Failed to " + "allocate memory"); + ret = -ENOMEM; + goto err; + } + + } else { + gf_log (GF_NFS, GF_LOG_ERROR, "Inode not found in itable and no creation was requested."); + ret = -ENOENT; + goto err; + } + } else { + gf_log (GF_NFS, GF_LOG_TRACE, "Inode was found in the itable."); + } + + uuid_copy (loc->gfid, gfid); + + ret = nfs_inode_loc_fill (inode, loc, how); + if (ret < 0) { + gf_log (GF_NFS, GF_LOG_ERROR, "Inode loc filling failed.: %s", strerror (-ret)); + goto err; + } + +err: + if (inode) + inode_unref (inode); + return ret; +} + + +int +nfs_root_loc_fill (inode_table_t *itable, loc_t *loc) +{ + uuid_t rootgfid = {0, }; + + rootgfid[15] = 1; + return nfs_gfid_loc_fill (itable, rootgfid, loc, NFS_RESOLVE_EXIST); +} + + + +int +nfs_parent_inode_loc_fill (inode_t *parent, inode_t *entryinode, char *entry, + loc_t *loc) +{ + int ret = -EFAULT; + char *path = NULL; + + if ((!parent) || (!entry) || (!loc) || (!entryinode)) + return ret; + + ret = inode_path (parent, entry, &path); + if (ret < 0) { + gf_log (GF_NFS, GF_LOG_ERROR, "path resolution failed %s", + path); + goto err; + } + + ret = nfs_loc_fill (loc, entryinode, parent, path); + GF_FREE (path); +err: + return ret; +} + + +/* Returns -1 if parent is not available, return -2 if the entry is not + * available. In case the return is going to be -2, and how = NFS_RESOLVE_CREATE + * it does however fill in the loc so that it can be used to perform a lookup + * fop for the entry. + * On other errors, return -3. 0 on success. + */ +int +nfs_entry_loc_fill (inode_table_t *itable, uuid_t pargfid, char *entry, + loc_t *loc, int how) +{ + inode_t *parent = NULL; + inode_t *entryinode = NULL; + int ret = -3; + char *resolvedpath = NULL; + int pret = -3; + + if ((!itable) || (!entry) || (!loc)) + return ret; + + parent = inode_find (itable, pargfid); + + ret = -1; + /* Will need hard resolution now */ + if (!parent) + goto err; + + uuid_copy (loc->pargfid, pargfid); + + ret = -2; + entryinode = inode_grep (itable, parent, entry); + if (!entryinode) { + if (how == NFS_RESOLVE_CREATE) { + /* Even though we'll create the inode and the loc for + * a missing inode, we still need to return -2 so + * that the caller can use the filled loc to call + * lookup. + */ + entryinode = inode_new (itable); + /* Cannot change ret because that must + * continue to have -2. + */ + pret = nfs_parent_inode_loc_fill (parent, entryinode, + entry, loc); + /* Only if parent loc fill fails, should we notify error + * through ret, otherwise, we still need to force a + * lookup by returning -2. + */ + if (pret < 0) + ret = -3; + } + goto err; + } + + ret = inode_path (parent, entry, &resolvedpath); + if (ret < 0) { + gf_log (GF_NFS, GF_LOG_ERROR, "path resolution failed %s", + resolvedpath); + ret = -3; + goto err; + } + + ret = nfs_loc_fill (loc, entryinode, parent, resolvedpath); + if (ret < 0) { + gf_log (GF_NFS, GF_LOG_ERROR, "loc_fill failed %s", + resolvedpath); + ret = -3; + } + +err: + if (parent) + inode_unref (parent); + + if (entryinode) + inode_unref (entryinode); + + GF_FREE (resolvedpath); + + return ret; +} + + +uint32_t +nfs_hash_gfid (uuid_t gfid) +{ + uint32_t hash = 0; + uint64_t msb64 = 0; + uint64_t lsb64 = 0; + uint32_t a1 = 0; + uint32_t a2 = 0; + uint32_t a3 = 0; + uint32_t a4 = 0; + uint32_t b1 = 0; + uint32_t b2 = 0; + + if (__is_root_gfid (gfid)) + return 0x1; + + memcpy (&msb64, &gfid[8], 8); + memcpy (&lsb64, &gfid[0], 8); + + a1 = (msb64 << 32); + a2 = (msb64 >> 32); + a3 = (lsb64 << 32); + a4 = (lsb64 >> 32); + + b1 = a1 ^ a4; + b2 = a2 ^ a3; + + hash = b1 ^ b2; + + return hash; +} + + +void +nfs_fix_generation (xlator_t *this, inode_t *inode) +{ + uint64_t raw_ctx = 0; + struct nfs_inode_ctx *ictx = NULL; + struct nfs_state *priv = NULL; + int ret = -1; + + if (!inode) { + return; + } + priv = this->private; + + if (inode_ctx_get(inode,this,&raw_ctx) == 0) { + ictx = (struct nfs_inode_ctx *)raw_ctx; + ictx->generation = priv->generation; + } + else { + ictx = GF_CALLOC (1, sizeof (struct nfs_inode_ctx), + gf_nfs_mt_inode_ctx); + if (!ictx) { + gf_log (this->name, GF_LOG_ERROR, + "could not allocate nfs inode ctx"); + return; + } + INIT_LIST_HEAD(&ictx->shares); + ictx->generation = priv->generation; + ret = inode_ctx_put (inode, this, (uint64_t)ictx); + if (ret) { + gf_log (this->name, GF_LOG_ERROR, + "could not store nfs inode ctx"); + return; + } + } +} |