[PATCH 4/6] sysfs: Add support for tagged directories with untagged members.
From: Eric W. Biederman <hidden>
Date: 2010-03-30 18:31:27
Also in:
linux-fsdevel, lkml
Subsystem:
driver core, kobjects, debugfs and sysfs, filesystems (vfs and infrastructure), the rest · Maintainers:
Greg Kroah-Hartman, "Rafael J. Wysocki", Danilo Krummrich, Alexander Viro, Christian Brauner, Linus Torvalds
From: Eric W. Biederman <redacted> I had hopped to avoid this but the bonding driver adds a file to /sys/class/net/ and the easiest way to handle that file is to make it untagged and to register it only once. So relax the rules on tagged directories, and make bonding work. Signed-off-by: Eric W. Biederman <redacted> --- fs/sysfs/dir.c | 12 +++--------- fs/sysfs/inode.c | 2 ++ 2 files changed, 5 insertions(+), 9 deletions(-)
diff --git a/fs/sysfs/dir.c b/fs/sysfs/dir.c
index b0e7911..d3dd097 100644
--- a/fs/sysfs/dir.c
+++ b/fs/sysfs/dir.c@@ -383,12 +383,6 @@ int __sysfs_add_one(struct sysfs_addrm_cxt *acxt, struct sysfs_dirent *sd) if (sysfs_find_dirent(acxt->parent_sd, sd->s_ns, sd->s_name)) return -EEXIST; - if (sysfs_ns_type(acxt->parent_sd) && !sd->s_ns) { - WARN(1, KERN_WARNING "sysfs: ns required in '%s' for '%s'\n", - acxt->parent_sd->s_name, sd->s_name); - return -EINVAL; - } - sd->s_parent = sysfs_get(acxt->parent_sd); sysfs_link_sibling(sd);
@@ -545,7 +539,7 @@ struct sysfs_dirent *sysfs_find_dirent(struct sysfs_dirent *parent_sd, struct sysfs_dirent *sd; for (sd = parent_sd->s_dir.children; sd; sd = sd->s_sibling) { - if (sd->s_ns != ns) + if (ns && sd->s_ns && (sd->s_ns != ns)) continue; if (!strcmp(sd->s_name, name)) return sd;
@@ -879,7 +873,7 @@ static struct sysfs_dirent *sysfs_dir_pos(const void *ns, while (pos && (ino > pos->s_ino)) pos = pos->s_sibling; } - while (pos && pos->s_ns != ns) + while (pos && pos->s_ns && pos->s_ns != ns) pos = pos->s_sibling; return pos; }
@@ -890,7 +884,7 @@ static struct sysfs_dirent *sysfs_dir_next_pos(const void *ns, pos = sysfs_dir_pos(ns, parent_sd, ino, pos); if (pos) pos = pos->s_sibling; - while (pos && pos->s_ns != ns) + while (pos && pos->s_ns && pos->s_ns != ns) pos = pos->s_sibling; return pos; }
diff --git a/fs/sysfs/inode.c b/fs/sysfs/inode.c
index 90a899e..6c962ca 100644
--- a/fs/sysfs/inode.c
+++ b/fs/sysfs/inode.c@@ -334,6 +334,8 @@ int sysfs_hash_and_remove(struct sysfs_dirent *dir_sd, const void *ns, const cha sysfs_addrm_start(&acxt, dir_sd); sd = sysfs_find_dirent(dir_sd, ns, name); + if (sd && (sd->s_ns != ns)) + sd = NULL; if (sd) sysfs_remove_one(&acxt, sd);
--
1.6.5.2.143.g8cc62