diff options
| author | Christoph Hellwig <hch@infradead.org> | 2013-12-20 05:16:42 -0800 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2014-01-25 23:58:18 -0500 |
| commit | 37bc15392a2363ca822b2c2828e0ccafbea32f75 (patch) | |
| tree | 66ed7ab55227b74ad0af9d79bde0e95bb49e13ed /fs/posix_acl.c | |
| parent | 5bf3258fd2acd8515450ab8efcd97c9d3b69f7f9 (diff) | |
| download | lwn-37bc15392a2363ca822b2c2828e0ccafbea32f75.tar.gz lwn-37bc15392a2363ca822b2c2828e0ccafbea32f75.zip | |
fs: make posix_acl_create more useful
Rename the current posix_acl_created to __posix_acl_create and add
a fully featured helper to set up the ACLs on file creation that
uses get_acl().
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/posix_acl.c')
| -rw-r--r-- | fs/posix_acl.c | 57 |
1 files changed, 53 insertions, 4 deletions
diff --git a/fs/posix_acl.c b/fs/posix_acl.c index 08218550b0db..8f245ab20143 100644 --- a/fs/posix_acl.c +++ b/fs/posix_acl.c @@ -410,7 +410,7 @@ static int __posix_acl_chmod_masq(struct posix_acl *acl, umode_t mode) } int -posix_acl_create(struct posix_acl **acl, gfp_t gfp, umode_t *mode_p) +__posix_acl_create(struct posix_acl **acl, gfp_t gfp, umode_t *mode_p) { struct posix_acl *clone = posix_acl_clone(*acl, gfp); int err = -ENOMEM; @@ -425,7 +425,7 @@ posix_acl_create(struct posix_acl **acl, gfp_t gfp, umode_t *mode_p) *acl = clone; return err; } -EXPORT_SYMBOL(posix_acl_create); +EXPORT_SYMBOL(__posix_acl_create); int __posix_acl_chmod(struct posix_acl **acl, gfp_t gfp, umode_t mode) @@ -446,7 +446,7 @@ __posix_acl_chmod(struct posix_acl **acl, gfp_t gfp, umode_t mode) EXPORT_SYMBOL(__posix_acl_chmod); int -posix_acl_chmod(struct inode *inode) +posix_acl_chmod(struct inode *inode, umode_t mode) { struct posix_acl *acl; int ret = 0; @@ -460,7 +460,7 @@ posix_acl_chmod(struct inode *inode) if (IS_ERR_OR_NULL(acl)) return PTR_ERR(acl); - ret = __posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode); + ret = __posix_acl_chmod(&acl, GFP_KERNEL, mode); if (ret) return ret; ret = inode->i_op->set_acl(inode, acl, ACL_TYPE_ACCESS); @@ -469,6 +469,55 @@ posix_acl_chmod(struct inode *inode) } EXPORT_SYMBOL(posix_acl_chmod); +int +posix_acl_create(struct inode *dir, umode_t *mode, + struct posix_acl **default_acl, struct posix_acl **acl) +{ + struct posix_acl *p; + int ret; + + if (S_ISLNK(*mode) || !IS_POSIXACL(dir)) + goto no_acl; + + p = get_acl(dir, ACL_TYPE_DEFAULT); + if (IS_ERR(p)) + return PTR_ERR(p); + + if (!p) { + *mode &= ~current_umask(); + goto no_acl; + } + + *acl = posix_acl_clone(p, GFP_NOFS); + if (!*acl) + return -ENOMEM; + + ret = posix_acl_create_masq(*acl, mode); + if (ret < 0) { + posix_acl_release(*acl); + return -ENOMEM; + } + + if (ret == 0) { + posix_acl_release(*acl); + *acl = NULL; + } + + if (!S_ISDIR(*mode)) { + posix_acl_release(p); + *default_acl = NULL; + } else { + *default_acl = p; + } + return 0; + +no_acl: + *default_acl = NULL; + *acl = NULL; + return 0; +} +EXPORT_SYMBOL_GPL(posix_acl_create); + /* * Fix up the uids and gids in posix acl extended attributes in place. */ |