diff options
author | Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> | 2011-05-18 17:38:07 +0530 |
---|---|---|
committer | Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> | 2011-08-25 20:16:41 +0530 |
commit | 84dfb926e508aeedd5088a4f029464bf2d5b3791 (patch) | |
tree | 77f48e09688e99c6073b3e720aac9ae9189486b1 /hw | |
parent | 56a7a874e962e28522857fbf72eaefb1a07e2001 (diff) |
hw/9pfs: Add reference counting for fid
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Diffstat (limited to 'hw')
-rw-r--r-- | hw/9pfs/virtio-9p.c | 273 | ||||
-rw-r--r-- | hw/9pfs/virtio-9p.h | 2 |
2 files changed, 184 insertions, 91 deletions
diff --git a/hw/9pfs/virtio-9p.c b/hw/9pfs/virtio-9p.c index ad70768dce..555f456111 100644 --- a/hw/9pfs/virtio-9p.c +++ b/hw/9pfs/virtio-9p.c @@ -232,16 +232,17 @@ static size_t v9fs_string_size(V9fsString *str) return str->size; } -static V9fsFidState *lookup_fid(V9fsState *s, int32_t fid) +static V9fsFidState *get_fid(V9fsState *s, int32_t fid) { V9fsFidState *f; for (f = s->fid_list; f; f = f->next) { + BUG_ON(f->clunked); if (f->fid == fid) { + f->ref++; return f; } } - return NULL; } @@ -249,16 +250,17 @@ static V9fsFidState *alloc_fid(V9fsState *s, int32_t fid) { V9fsFidState *f; - f = lookup_fid(s, fid); - if (f) { - return NULL; + for (f = s->fid_list; f; f = f->next) { + /* If fid is already there return NULL */ + BUG_ON(f->clunked); + if (f->fid == fid) { + return NULL; + } } - f = g_malloc0(sizeof(V9fsFidState)); - f->fid = fid; f->fid_type = P9_FID_NONE; - + f->ref = 1; f->next = s->fid_list; s->fid_list = f; @@ -299,9 +301,33 @@ free_value: return retval; } -static int free_fid(V9fsState *s, int32_t fid) +static int free_fid(V9fsState *s, V9fsFidState *fidp) { int retval = 0; + + if (fidp->fid_type == P9_FID_FILE) { + retval = v9fs_co_close(s, fidp); + } else if (fidp->fid_type == P9_FID_DIR) { + retval = v9fs_co_closedir(s, fidp); + } else if (fidp->fid_type == P9_FID_XATTR) { + retval = v9fs_xattr_fid_clunk(s, fidp); + } + v9fs_string_free(&fidp->path); + g_free(fidp); + return retval; +} + +static void put_fid(V9fsState *s, V9fsFidState *fidp) +{ + BUG_ON(!fidp->ref); + fidp->ref--; + if (!fidp->ref && fidp->clunked) { + free_fid(s, fidp); + } +} + +static int clunk_fid(V9fsState *s, int32_t fid) +{ V9fsFidState **fidpp, *fidp; for (fidpp = &s->fid_list; *fidpp; fidpp = &(*fidpp)->next) { @@ -313,20 +339,10 @@ static int free_fid(V9fsState *s, int32_t fid) if (*fidpp == NULL) { return -ENOENT; } - fidp = *fidpp; *fidpp = fidp->next; - - if (fidp->fid_type == P9_FID_FILE) { - retval = v9fs_co_close(s, fidp); - } else if (fidp->fid_type == P9_FID_DIR) { - retval = v9fs_co_closedir(s, fidp); - } else if (fidp->fid_type == P9_FID_XATTR) { - retval = v9fs_xattr_fid_clunk(s, fidp); - } - v9fs_string_free(&fidp->path); - g_free(fidp); - return retval; + fidp->clunked = 1; + return 0; } #define P9_QID_TYPE_DIR 0x80 @@ -1014,19 +1030,21 @@ static void v9fs_attach(void *opaque) fidp = alloc_fid(s, fid); if (fidp == NULL) { err = -EINVAL; - goto out; + goto out_nofid; } fidp->uid = n_uname; v9fs_string_sprintf(&fidp->path, "%s", "/"); err = fid_to_qid(s, fidp, &qid); if (err < 0) { err = -EINVAL; - free_fid(s, fid); + clunk_fid(s, fid); goto out; } offset += pdu_marshal(pdu, offset, "Q", &qid); err = offset; out: + put_fid(s, fidp); +out_nofid: complete_pdu(s, pdu, err); v9fs_string_free(&uname); v9fs_string_free(&aname); @@ -1044,10 +1062,11 @@ static void v9fs_stat(void *opaque) V9fsState *s = pdu->s; pdu_unmarshal(pdu, offset, "d", &fid); - fidp = lookup_fid(s, fid); + + fidp = get_fid(s, fid); if (fidp == NULL) { err = -ENOENT; - goto out; + goto out_nofid; } err = v9fs_co_lstat(s, &fidp->path, &stbuf); if (err < 0) { @@ -1061,6 +1080,8 @@ static void v9fs_stat(void *opaque) err = offset; v9fs_stat_free(&v9stat); out: + put_fid(s, fidp); +out_nofid: complete_pdu(s, pdu, err); } @@ -1078,10 +1099,10 @@ static void v9fs_getattr(void *opaque) pdu_unmarshal(pdu, offset, "dq", &fid, &request_mask); - fidp = lookup_fid(s, fid); + fidp = get_fid(s, fid); if (fidp == NULL) { retval = -ENOENT; - goto out; + goto out_nofid; } /* * Currently we only support BASIC fields in stat, so there is no @@ -1095,6 +1116,8 @@ static void v9fs_getattr(void *opaque) retval = offset; retval += pdu_marshal(pdu, offset, "A", &v9stat_dotl); out: + put_fid(s, fidp); +out_nofid: complete_pdu(s, pdu, retval); } @@ -1122,10 +1145,10 @@ static void v9fs_setattr(void *opaque) pdu_unmarshal(pdu, offset, "dI", &fid, &v9iattr); - fidp = lookup_fid(s, fid); + fidp = get_fid(s, fid); if (fidp == NULL) { err = -EINVAL; - goto out; + goto out_nofid; } if (v9iattr.valid & ATTR_MODE) { err = v9fs_co_chmod(s, &fidp->path, v9iattr.mode); @@ -1187,6 +1210,8 @@ static void v9fs_setattr(void *opaque) } err = offset; out: + put_fid(s, fidp); +out_nofid: complete_pdu(s, pdu, err); } @@ -1213,7 +1238,7 @@ static void v9fs_walk(void *opaque) int32_t fid, newfid; V9fsString *wnames = NULL; V9fsFidState *fidp; - V9fsFidState *newfidp; + V9fsFidState *newfidp = NULL;; V9fsPDU *pdu = opaque; V9fsState *s = pdu->s; @@ -1229,12 +1254,12 @@ static void v9fs_walk(void *opaque) } else if (nwnames > P9_MAXWELEM) { err = -EINVAL; - goto out; + goto out_nofid; } - fidp = lookup_fid(s, fid); + fidp = get_fid(s, fid); if (fidp == NULL) { err = -ENOENT; - goto out; + goto out_nofid; } if (fid == newfid) { BUG_ON(fidp->fid_type != P9_FID_NONE); @@ -1267,7 +1292,7 @@ static void v9fs_walk(void *opaque) v9fs_string_copy(&newfidp->path, &path); err = v9fs_co_lstat(s, &newfidp->path, &stbuf); if (err < 0) { - free_fid(s, newfidp->fid); + clunk_fid(s, newfidp->fid); v9fs_string_free(&path); goto out; } @@ -1277,6 +1302,11 @@ static void v9fs_walk(void *opaque) } err = v9fs_walk_marshal(pdu, nwnames, qids); out: + put_fid(s, fidp); + if (newfidp) { + put_fid(s, newfidp); + } +out_nofid: complete_pdu(s, pdu, err); if (nwnames && nwnames <= P9_MAXWELEM) { for (name_idx = 0; name_idx < nwnames; name_idx++) { @@ -1325,10 +1355,10 @@ static void v9fs_open(void *opaque) } else { pdu_unmarshal(pdu, offset, "db", &fid, &mode); } - fidp = lookup_fid(s, fid); + fidp = get_fid(s, fid); if (fidp == NULL) { err = -ENOENT; - goto out; + goto out_nofid; } BUG_ON(fidp->fid_type != P9_FID_NONE); @@ -1364,6 +1394,8 @@ static void v9fs_open(void *opaque) err = offset; } out: + put_fid(s, fidp); +out_nofid: complete_pdu(s, pdu, err); } @@ -1385,10 +1417,10 @@ static void v9fs_lcreate(void *opaque) pdu_unmarshal(pdu, offset, "dsddd", &dfid, &name, &flags, &mode, &gid); - fidp = lookup_fid(pdu->s, dfid); + fidp = get_fid(pdu->s, dfid); if (fidp == NULL) { err = -ENOENT; - goto out; + goto out_nofid; } v9fs_string_sprintf(&fullname, "%s/%s", fidp->path.data, name.data); @@ -1415,6 +1447,8 @@ static void v9fs_lcreate(void *opaque) offset += pdu_marshal(pdu, offset, "Qd", &qid, iounit); err = offset; out: + put_fid(pdu->s, fidp); +out_nofid: complete_pdu(pdu->s, pdu, err); v9fs_string_free(&name); v9fs_string_free(&fullname); @@ -1431,16 +1465,17 @@ static void v9fs_fsync(void *opaque) V9fsState *s = pdu->s; pdu_unmarshal(pdu, offset, "dd", &fid, &datasync); - fidp = lookup_fid(s, fid); + fidp = get_fid(s, fid); if (fidp == NULL) { err = -ENOENT; - goto out; + goto out_nofid; } err = v9fs_co_fsync(s, fidp, datasync); if (!err) { err = offset; } -out: + put_fid(s, fidp); +out_nofid: complete_pdu(s, pdu, err); } @@ -1449,16 +1484,25 @@ static void v9fs_clunk(void *opaque) int err; int32_t fid; size_t offset = 7; + V9fsFidState *fidp; V9fsPDU *pdu = opaque; V9fsState *s = pdu->s; pdu_unmarshal(pdu, offset, "d", &fid); - err = free_fid(s, fid); + + fidp = get_fid(s, fid); + if (fidp == NULL) { + err = -ENOENT; + goto out_nofid; + } + err = clunk_fid(s, fidp->fid); if (err < 0) { goto out; } err = offset; out: + put_fid(s, fidp); +out_nofid: complete_pdu(s, pdu, err); } @@ -1557,10 +1601,11 @@ static void v9fs_read(void *opaque) V9fsState *s = pdu->s; pdu_unmarshal(pdu, offset, "dqd", &fid, &off, &max_count); - fidp = lookup_fid(s, fid); + + fidp = get_fid(s, fid); if (fidp == NULL) { err = -EINVAL; - goto out; + goto out_nofid; } if (fidp->fid_type == P9_FID_DIR) { @@ -1612,6 +1657,8 @@ static void v9fs_read(void *opaque) err = -EINVAL; } out: + put_fid(s, fidp); +out_nofid: complete_pdu(s, pdu, err); } @@ -1696,8 +1743,12 @@ static void v9fs_readdir(void *opaque) pdu_unmarshal(pdu, offset, "dqd", &fid, &initial_offset, &max_count); - fidp = lookup_fid(s, fid); - if (fidp == NULL || !fidp->fs.dir) { + fidp = get_fid(s, fid); + if (fidp == NULL) { + retval = -EINVAL; + goto out_nofid; + } + if (!fidp->fs.dir) { retval = -EINVAL; goto out; } @@ -1715,6 +1766,8 @@ static void v9fs_readdir(void *opaque) retval += pdu_marshal(pdu, offset, "d", count); retval += count; out: + put_fid(s, fidp); +out_nofid: complete_pdu(s, pdu, retval); } @@ -1779,10 +1832,11 @@ static void v9fs_write(void *opaque) V9fsState *s = pdu->s; pdu_unmarshal(pdu, offset, "dqdv", &fid, &off, &count, sg, &cnt); - fidp = lookup_fid(s, fid); + + fidp = get_fid(s, fid); if (fidp == NULL) { err = -EINVAL; - goto out; + goto out_nofid; } if (fidp->fid_type == P9_FID_FILE) { if (fidp->fs.fd == -1) { @@ -1822,6 +1876,8 @@ static void v9fs_write(void *opaque) offset += pdu_marshal(pdu, offset, "d", total); err = offset; out: + put_fid(s, fidp); +out_nofid: complete_pdu(s, pdu, err); } @@ -1846,10 +1902,10 @@ static void v9fs_create(void *opaque) pdu_unmarshal(pdu, offset, "dsdbs", &fid, &name, &perm, &mode, &extension); - fidp = lookup_fid(pdu->s, fid); + fidp = get_fid(pdu->s, fid); if (fidp == NULL) { err = -EINVAL; - goto out; + goto out_nofid; } v9fs_string_sprintf(&fullname, "%s/%s", fidp->path.data, name.data); @@ -1879,15 +1935,17 @@ static void v9fs_create(void *opaque) } } else if (perm & P9_STAT_MODE_LINK) { int32_t nfid = atoi(extension.data); - V9fsFidState *nfidp = lookup_fid(pdu->s, nfid); + V9fsFidState *nfidp = get_fid(pdu->s, nfid); if (nfidp == NULL) { err = -EINVAL; goto out; } err = v9fs_co_link(pdu->s, &nfidp->path, &fullname); if (err < 0) { + put_fid(pdu->s, nfidp); goto out; } + put_fid(pdu->s, nfidp); } else if (perm & P9_STAT_MODE_DEVICE) { char ctype; uint32_t major, minor; @@ -1950,6 +2008,8 @@ static void v9fs_create(void *opaque) offset += pdu_marshal(pdu, offset, "Qd", &qid, iounit); err = offset; out: + put_fid(pdu->s, fidp); +out_nofid: complete_pdu(pdu->s, pdu, err); v9fs_string_free(&name); v9fs_string_free(&extension); @@ -1973,10 +2033,10 @@ static void v9fs_symlink(void *opaque) v9fs_string_init(&fullname); pdu_unmarshal(pdu, offset, "dssd", &dfid, &name, &symname, &gid); - dfidp = lookup_fid(pdu->s, dfid); + dfidp = get_fid(pdu->s, dfid); if (dfidp == NULL) { err = -EINVAL; - goto out; + goto out_nofid; } v9fs_string_sprintf(&fullname, "%s/%s", dfidp->path.data, name.data); @@ -1992,6 +2052,8 @@ static void v9fs_symlink(void *opaque) offset += pdu_marshal(pdu, offset, "Q", &qid); err = offset; out: + put_fid(pdu->s, dfidp); +out_nofid: complete_pdu(pdu->s, pdu, err); v9fs_string_free(&name); v9fs_string_free(&symname); @@ -2021,13 +2083,13 @@ static void v9fs_link(void *opaque) pdu_unmarshal(pdu, offset, "dds", &dfid, &oldfid, &name); - dfidp = lookup_fid(s, dfid); + dfidp = get_fid(s, dfid); if (dfidp == NULL) { err = -ENOENT; - goto out; + goto out_nofid; } - oldfidp = lookup_fid(s, oldfid); + oldfidp = get_fid(s, oldfid); if (oldfidp == NULL) { err = -ENOENT; goto out; @@ -2041,6 +2103,8 @@ static void v9fs_link(void *opaque) v9fs_string_free(&fullname); out: + put_fid(s, dfidp); +out_nofid: v9fs_string_free(&name); complete_pdu(s, pdu, err); } @@ -2055,10 +2119,10 @@ static void v9fs_remove(void *opaque) pdu_unmarshal(pdu, offset, "d", &fid); - fidp = lookup_fid(pdu->s, fid); + fidp = get_fid(pdu->s, fid); if (fidp == NULL) { err = -EINVAL; - goto out; + goto out_nofid; } err = v9fs_co_remove(pdu->s, &fidp->path); if (!err) { @@ -2066,8 +2130,9 @@ static void v9fs_remove(void *opaque) } /* For TREMOVE we need to clunk the fid even on failed remove */ - free_fid(pdu->s, fidp->fid); -out: + clunk_fid(pdu->s, fidp->fid); + put_fid(pdu->s, fidp); +out_nofid: complete_pdu(pdu->s, pdu, err); } @@ -2076,14 +2141,14 @@ static int v9fs_complete_rename(V9fsState *s, V9fsFidState *fidp, { char *end; int err = 0; + V9fsFidState *dirfidp = NULL; char *old_name, *new_name; if (newdirfid != -1) { - V9fsFidState *dirfidp; - dirfidp = lookup_fid(s, newdirfid); + dirfidp = get_fid(s, newdirfid); if (dirfidp == NULL) { err = -ENOENT; - goto out; + goto out_nofid; } BUG_ON(dirfidp->fid_type != P9_FID_NONE); @@ -2136,6 +2201,10 @@ static int v9fs_complete_rename(V9fsState *s, V9fsFidState *fidp, v9fs_string_copy(&fidp->path, name); } out: + if (dirfidp) { + put_fid(s, dirfidp); + } +out_nofid: return err; } @@ -2152,10 +2221,10 @@ static void v9fs_rename(void *opaque) pdu_unmarshal(pdu, offset, "dds", &fid, &newdirfid, &name); - fidp = lookup_fid(s, fid); + fidp = get_fid(s, fid); if (fidp == NULL) { err = -ENOENT; - goto out; + goto out_nofid; } BUG_ON(fidp->fid_type != P9_FID_NONE); @@ -2163,7 +2232,8 @@ static void v9fs_rename(void *opaque) if (!err) { err = offset; } -out: + put_fid(s, fidp); +out_nofid: complete_pdu(s, pdu, err); v9fs_string_free(&name); } @@ -2181,10 +2251,11 @@ static void v9fs_wstat(void *opaque) V9fsState *s = pdu->s; pdu_unmarshal(pdu, offset, "dwS", &fid, &unused, &v9stat); - fidp = lookup_fid(s, fid); + + fidp = get_fid(s, fid); if (fidp == NULL) { err = -EINVAL; - goto out; + goto out_nofid; } /* do we need to sync the file? */ if (donttouch_stat(&v9stat)) { @@ -2250,6 +2321,8 @@ static void v9fs_wstat(void *opaque) } err = offset; out: + put_fid(s, fidp); +out_nofid: v9fs_stat_free(&v9stat); complete_pdu(s, pdu, err); } @@ -2310,10 +2383,10 @@ static void v9fs_statfs(void *opaque) V9fsState *s = pdu->s; pdu_unmarshal(pdu, offset, "d", &fid); - fidp = lookup_fid(s, fid); + fidp = get_fid(s, fid); if (fidp == NULL) { retval = -ENOENT; - goto out; + goto out_nofid; } retval = v9fs_co_statfs(s, &fidp->path, &stbuf); if (retval < 0) { @@ -2322,6 +2395,8 @@ static void v9fs_statfs(void *opaque) retval = offset; retval += v9fs_fill_statfs(s, pdu, &stbuf); out: + put_fid(s, fidp); +out_nofid: complete_pdu(s, pdu, retval); return; } @@ -2347,10 +2422,10 @@ static void v9fs_mknod(void *opaque) pdu_unmarshal(pdu, offset, "dsdddd", &fid, &name, &mode, &major, &minor, &gid); - fidp = lookup_fid(s, fid); + fidp = get_fid(s, fid); if (fidp == NULL) { err = -ENOENT; - goto out; + goto out_nofid; } v9fs_string_sprintf(&fullname, "%s/%s", fidp->path.data, name.data); err = v9fs_co_mknod(s, &fullname, fidp->uid, gid, @@ -2366,6 +2441,8 @@ static void v9fs_mknod(void *opaque) err = offset; err += pdu_marshal(pdu, offset, "Q", &qid); out: + put_fid(s, fidp); +out_nofid: complete_pdu(s, pdu, err); v9fs_string_free(&fullname); v9fs_string_free(&name); @@ -2399,12 +2476,12 @@ static void v9fs_lock(void *opaque) /* We support only block flag now (that too ignored currently) */ if (flock->flags & ~P9_LOCK_FLAGS_BLOCK) { err = -EINVAL; - goto out; + goto out_nofid; } - fidp = lookup_fid(s, fid); + fidp = get_fid(s, fid); if (fidp == NULL) { err = -ENOENT; - goto out; + goto out_nofid; } err = v9fs_co_fstat(s, fidp->fs.fd, &stbuf); if (err < 0) { @@ -2412,6 +2489,8 @@ static void v9fs_lock(void *opaque) } status = P9_LOCK_SUCCESS; out: + put_fid(s, fidp); +out_nofid: err = offset; err += pdu_marshal(pdu, offset, "b", status); complete_pdu(s, pdu, err); @@ -2437,10 +2516,10 @@ static void v9fs_getlock(void *opaque) &glock->start, &glock->length, &glock->proc_id, &glock->client_id); - fidp = lookup_fid(s, fid); + fidp = get_fid(s, fid); if (fidp == NULL) { err = -ENOENT; - goto out; + goto out_nofid; } err = v9fs_co_fstat(s, fidp->fs.fd, &stbuf); if (err < 0) { @@ -2452,6 +2531,8 @@ static void v9fs_getlock(void *opaque) &glock->client_id); err = offset; out: + put_fid(s, fidp); +out_nofid: complete_pdu(s, pdu, err); g_free(glock); } @@ -2472,10 +2553,10 @@ static void v9fs_mkdir(void *opaque) v9fs_string_init(&fullname); pdu_unmarshal(pdu, offset, "dsdd", &fid, &name, &mode, &gid); - fidp = lookup_fid(pdu->s, fid); + fidp = get_fid(pdu->s, fid); if (fidp == NULL) { err = -ENOENT; - goto out; + goto out_nofid; } v9fs_string_sprintf(&fullname, "%s/%s", fidp->path.data, name.data); err = v9fs_co_mkdir(pdu->s, fullname.data, mode, fidp->uid, gid); @@ -2490,6 +2571,8 @@ static void v9fs_mkdir(void *opaque) offset += pdu_marshal(pdu, offset, "Q", &qid); err = offset; out: + put_fid(pdu->s, fidp); +out_nofid: complete_pdu(pdu->s, pdu, err); v9fs_string_free(&fullname); v9fs_string_free(&name); @@ -2503,15 +2586,15 @@ static void v9fs_xattrwalk(void *opaque) size_t offset = 7; int32_t fid, newfid; V9fsFidState *file_fidp; - V9fsFidState *xattr_fidp; + V9fsFidState *xattr_fidp = NULL; V9fsPDU *pdu = opaque; V9fsState *s = pdu->s; pdu_unmarshal(pdu, offset, "dds", &fid, &newfid, &name); - file_fidp = lookup_fid(s, fid); + file_fidp = get_fid(s, fid); if (file_fidp == NULL) { err = -ENOENT; - goto out; + goto out_nofid; } xattr_fidp = alloc_fid(s, newfid); if (xattr_fidp == NULL) { @@ -2526,7 +2609,7 @@ static void v9fs_xattrwalk(void *opaque) size = v9fs_co_llistxattr(s, &xattr_fidp->path, NULL, 0); if (size < 0) { err = size; - free_fid(s, xattr_fidp->fid); + clunk_fid(s, xattr_fidp->fid); goto out; } /* @@ -2541,7 +2624,7 @@ static void v9fs_xattrwalk(void *opaque) xattr_fidp->fs.xattr.value, xattr_fidp->fs.xattr.len); if (err < 0) { - free_fid(s, xattr_fidp->fid); + clunk_fid(s, xattr_fidp->fid); goto out; } } @@ -2556,7 +2639,7 @@ static void v9fs_xattrwalk(void *opaque) &name, NULL, 0); if (size < 0) { err = size; - free_fid(s, xattr_fidp->fid); + clunk_fid(s, xattr_fidp->fid); goto out; } /* @@ -2571,7 +2654,7 @@ static void v9fs_xattrwalk(void *opaque) &name, xattr_fidp->fs.xattr.value, xattr_fidp->fs.xattr.len); if (err < 0) { - free_fid(s, xattr_fidp->fid); + clunk_fid(s, xattr_fidp->fid); goto out; } } @@ -2579,6 +2662,11 @@ static void v9fs_xattrwalk(void *opaque) err = offset; } out: + put_fid(s, file_fidp); + if (xattr_fidp) { + put_fid(s, xattr_fidp); + } +out_nofid: complete_pdu(s, pdu, err); v9fs_string_free(&name); } @@ -2599,10 +2687,10 @@ static void v9fs_xattrcreate(void *opaque) pdu_unmarshal(pdu, offset, "dsqd", &fid, &name, &size, &flags); - file_fidp = lookup_fid(s, fid); + file_fidp = get_fid(s, fid); if (file_fidp == NULL) { err = -EINVAL; - goto out; + goto out_nofid; } /* Make the file fid point to xattr */ xattr_fidp = file_fidp; @@ -2618,7 +2706,8 @@ static void v9fs_xattrcreate(void *opaque) xattr_fidp->fs.xattr.value = NULL; } err = offset; -out: + put_fid(s, file_fidp); +out_nofid: complete_pdu(s, pdu, err); v9fs_string_free(&name); } @@ -2633,10 +2722,10 @@ static void v9fs_readlink(void *opaque) V9fsFidState *fidp; pdu_unmarshal(pdu, offset, "d", &fid); - fidp = lookup_fid(pdu->s, fid); + fidp = get_fid(pdu->s, fid); if (fidp == NULL) { err = -ENOENT; - goto out; + goto out_nofid; } v9fs_string_init(&target); @@ -2648,6 +2737,8 @@ static void v9fs_readlink(void *opaque) err = offset; v9fs_string_free(&target); out: + put_fid(pdu->s, fidp); +out_nofid: complete_pdu(pdu->s, pdu, err); } diff --git a/hw/9pfs/virtio-9p.h b/hw/9pfs/virtio-9p.h index 1d8c1b1093..e16e5f46a1 100644 --- a/hw/9pfs/virtio-9p.h +++ b/hw/9pfs/virtio-9p.h @@ -203,6 +203,8 @@ struct V9fsFidState V9fsXattr xattr; } fs; uid_t uid; + int ref; + int clunked; V9fsFidState *next; }; |