From 2211d5ba5c6c4e972ba6dbc912b2897425ea6621 Mon Sep 17 00:00:00 2001 From: Andreas Gruenbacher Date: Tue, 27 Sep 2016 13:03:22 +0200 Subject: [PATCH] posix_acl: xattr representation cleanups Remove the unnecessary typedefs and the zero-length a_entries array in struct posix_acl_xattr_header. Signed-off-by: Andreas Gruenbacher Signed-off-by: Al Viro --- .../lustre/lustre/include/lustre_acl.h | 6 +-- .../staging/lustre/lustre/ptlrpc/wiretest.c | 44 +++++++++---------- fs/btrfs/send.c | 2 +- fs/cifs/cifssmb.c | 14 +++--- fs/posix_acl.c | 18 ++++---- include/linux/posix_acl_xattr.h | 21 +++++---- 6 files changed, 51 insertions(+), 54 deletions(-) diff --git a/drivers/staging/lustre/lustre/include/lustre_acl.h b/drivers/staging/lustre/lustre/include/lustre_acl.h index fecabe139b1f..9786f6caaade 100644 --- a/drivers/staging/lustre/lustre/include/lustre_acl.h +++ b/drivers/staging/lustre/lustre/include/lustre_acl.h @@ -38,8 +38,8 @@ #include #define LUSTRE_POSIX_ACL_MAX_ENTRIES 32 -#define LUSTRE_POSIX_ACL_MAX_SIZE \ - (sizeof(posix_acl_xattr_header) + \ - LUSTRE_POSIX_ACL_MAX_ENTRIES * sizeof(posix_acl_xattr_entry)) +#define LUSTRE_POSIX_ACL_MAX_SIZE \ + (sizeof(struct posix_acl_xattr_header) + \ + LUSTRE_POSIX_ACL_MAX_ENTRIES * sizeof(struct posix_acl_xattr_entry)) #endif diff --git a/drivers/staging/lustre/lustre/ptlrpc/wiretest.c b/drivers/staging/lustre/lustre/ptlrpc/wiretest.c index 6cc2b2edf3fc..bcdf0f340083 100644 --- a/drivers/staging/lustre/lustre/ptlrpc/wiretest.c +++ b/drivers/staging/lustre/lustre/ptlrpc/wiretest.c @@ -3745,32 +3745,28 @@ void lustre_assert_wire_constants(void) CLASSERT(FIEMAP_EXTENT_NET == 0x80000000); /* Checks for type posix_acl_xattr_entry */ - LASSERTF((int)sizeof(posix_acl_xattr_entry) == 8, "found %lld\n", - (long long)(int)sizeof(posix_acl_xattr_entry)); - LASSERTF((int)offsetof(posix_acl_xattr_entry, e_tag) == 0, "found %lld\n", - (long long)(int)offsetof(posix_acl_xattr_entry, e_tag)); - LASSERTF((int)sizeof(((posix_acl_xattr_entry *)0)->e_tag) == 2, "found %lld\n", - (long long)(int)sizeof(((posix_acl_xattr_entry *)0)->e_tag)); - LASSERTF((int)offsetof(posix_acl_xattr_entry, e_perm) == 2, "found %lld\n", - (long long)(int)offsetof(posix_acl_xattr_entry, e_perm)); - LASSERTF((int)sizeof(((posix_acl_xattr_entry *)0)->e_perm) == 2, "found %lld\n", - (long long)(int)sizeof(((posix_acl_xattr_entry *)0)->e_perm)); - LASSERTF((int)offsetof(posix_acl_xattr_entry, e_id) == 4, "found %lld\n", - (long long)(int)offsetof(posix_acl_xattr_entry, e_id)); - LASSERTF((int)sizeof(((posix_acl_xattr_entry *)0)->e_id) == 4, "found %lld\n", - (long long)(int)sizeof(((posix_acl_xattr_entry *)0)->e_id)); + LASSERTF((int)sizeof(struct posix_acl_xattr_entry) == 8, "found %lld\n", + (long long)(int)sizeof(struct posix_acl_xattr_entry)); + LASSERTF((int)offsetof(struct posix_acl_xattr_entry, e_tag) == 0, "found %lld\n", + (long long)(int)offsetof(struct posix_acl_xattr_entry, e_tag)); + LASSERTF((int)sizeof(((struct posix_acl_xattr_entry *)0)->e_tag) == 2, "found %lld\n", + (long long)(int)sizeof(((struct posix_acl_xattr_entry *)0)->e_tag)); + LASSERTF((int)offsetof(struct posix_acl_xattr_entry, e_perm) == 2, "found %lld\n", + (long long)(int)offsetof(struct posix_acl_xattr_entry, e_perm)); + LASSERTF((int)sizeof(((struct posix_acl_xattr_entry *)0)->e_perm) == 2, "found %lld\n", + (long long)(int)sizeof(((struct posix_acl_xattr_entry *)0)->e_perm)); + LASSERTF((int)offsetof(struct posix_acl_xattr_entry, e_id) == 4, "found %lld\n", + (long long)(int)offsetof(struct posix_acl_xattr_entry, e_id)); + LASSERTF((int)sizeof(((struct posix_acl_xattr_entry *)0)->e_id) == 4, "found %lld\n", + (long long)(int)sizeof(((struct posix_acl_xattr_entry *)0)->e_id)); /* Checks for type posix_acl_xattr_header */ - LASSERTF((int)sizeof(posix_acl_xattr_header) == 4, "found %lld\n", - (long long)(int)sizeof(posix_acl_xattr_header)); - LASSERTF((int)offsetof(posix_acl_xattr_header, a_version) == 0, "found %lld\n", - (long long)(int)offsetof(posix_acl_xattr_header, a_version)); - LASSERTF((int)sizeof(((posix_acl_xattr_header *)0)->a_version) == 4, "found %lld\n", - (long long)(int)sizeof(((posix_acl_xattr_header *)0)->a_version)); - LASSERTF((int)offsetof(posix_acl_xattr_header, a_entries) == 4, "found %lld\n", - (long long)(int)offsetof(posix_acl_xattr_header, a_entries)); - LASSERTF((int)sizeof(((posix_acl_xattr_header *)0)->a_entries) == 0, "found %lld\n", - (long long)(int)sizeof(((posix_acl_xattr_header *)0)->a_entries)); + LASSERTF((int)sizeof(struct posix_acl_xattr_header) == 4, "found %lld\n", + (long long)(int)sizeof(struct posix_acl_xattr_header)); + LASSERTF((int)offsetof(struct posix_acl_xattr_header, a_version) == 0, "found %lld\n", + (long long)(int)offsetof(struct posix_acl_xattr_header, a_version)); + LASSERTF((int)sizeof(((struct posix_acl_xattr_header *)0)->a_version) == 4, "found %lld\n", + (long long)(int)sizeof(((struct posix_acl_xattr_header *)0)->a_version)); /* Checks for struct link_ea_header */ LASSERTF((int)sizeof(struct link_ea_header) == 24, "found %lld\n", diff --git a/fs/btrfs/send.c b/fs/btrfs/send.c index a87675ffd02b..1379e59277e2 100644 --- a/fs/btrfs/send.c +++ b/fs/btrfs/send.c @@ -4329,7 +4329,7 @@ static int __process_new_xattr(int num, struct btrfs_key *di_key, int ret; struct send_ctx *sctx = ctx; struct fs_path *p; - posix_acl_xattr_header dummy_acl; + struct posix_acl_xattr_header dummy_acl; p = fs_path_alloc(); if (!p) diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c index d47197ea4ab6..fb63e4c70cff 100644 --- a/fs/cifs/cifssmb.c +++ b/fs/cifs/cifssmb.c @@ -3334,7 +3334,7 @@ CIFSSMB_set_compression(const unsigned int xid, struct cifs_tcon *tcon, #ifdef CONFIG_CIFS_POSIX /*Convert an Access Control Entry from wire format to local POSIX xattr format*/ -static void cifs_convert_ace(posix_acl_xattr_entry *ace, +static void cifs_convert_ace(struct posix_acl_xattr_entry *ace, struct cifs_posix_ace *cifs_ace) { /* u8 cifs fields do not need le conversion */ @@ -3358,7 +3358,7 @@ static int cifs_copy_posix_acl(char *trgt, char *src, const int buflen, __u16 count; struct cifs_posix_ace *pACE; struct cifs_posix_acl *cifs_acl = (struct cifs_posix_acl *)src; - posix_acl_xattr_header *local_acl = (posix_acl_xattr_header *)trgt; + struct posix_acl_xattr_header *local_acl = (void *)trgt; if (le16_to_cpu(cifs_acl->version) != CIFS_ACL_VERSION) return -EOPNOTSUPP; @@ -3396,9 +3396,11 @@ static int cifs_copy_posix_acl(char *trgt, char *src, const int buflen, } else if (size > buflen) { return -ERANGE; } else /* buffer big enough */ { + struct posix_acl_xattr_entry *ace = (void *)(local_acl + 1); + local_acl->a_version = cpu_to_le32(POSIX_ACL_XATTR_VERSION); for (i = 0; i < count ; i++) { - cifs_convert_ace(&local_acl->a_entries[i], pACE); + cifs_convert_ace(&ace[i], pACE); pACE++; } } @@ -3406,7 +3408,7 @@ static int cifs_copy_posix_acl(char *trgt, char *src, const int buflen, } static __u16 convert_ace_to_cifs_ace(struct cifs_posix_ace *cifs_ace, - const posix_acl_xattr_entry *local_ace) + const struct posix_acl_xattr_entry *local_ace) { __u16 rc = 0; /* 0 = ACL converted ok */ @@ -3431,7 +3433,7 @@ static __u16 ACL_to_cifs_posix(char *parm_data, const char *pACL, { __u16 rc = 0; struct cifs_posix_acl *cifs_acl = (struct cifs_posix_acl *)parm_data; - posix_acl_xattr_header *local_acl = (posix_acl_xattr_header *)pACL; + struct posix_acl_xattr_header *local_acl = (void *)pACL; int count; int i; @@ -3459,7 +3461,7 @@ static __u16 ACL_to_cifs_posix(char *parm_data, const char *pACL, } for (i = 0; i < count; i++) { rc = convert_ace_to_cifs_ace(&cifs_acl->ace_array[i], - &local_acl->a_entries[i]); + (struct posix_acl_xattr_entry *)(local_acl + 1)); if (rc != 0) { /* ACE not converted */ break; diff --git a/fs/posix_acl.c b/fs/posix_acl.c index 59d47ab0791a..8cdcbb1dd092 100644 --- a/fs/posix_acl.c +++ b/fs/posix_acl.c @@ -633,15 +633,15 @@ static void posix_acl_fix_xattr_userns( struct user_namespace *to, struct user_namespace *from, void *value, size_t size) { - posix_acl_xattr_header *header = (posix_acl_xattr_header *)value; - posix_acl_xattr_entry *entry = (posix_acl_xattr_entry *)(header+1), *end; + struct posix_acl_xattr_header *header = value; + struct posix_acl_xattr_entry *entry = (void *)(header + 1), *end; int count; kuid_t uid; kgid_t gid; if (!value) return; - if (size < sizeof(posix_acl_xattr_header)) + if (size < sizeof(struct posix_acl_xattr_header)) return; if (header->a_version != cpu_to_le32(POSIX_ACL_XATTR_VERSION)) return; @@ -691,15 +691,15 @@ struct posix_acl * posix_acl_from_xattr(struct user_namespace *user_ns, const void *value, size_t size) { - posix_acl_xattr_header *header = (posix_acl_xattr_header *)value; - posix_acl_xattr_entry *entry = (posix_acl_xattr_entry *)(header+1), *end; + const struct posix_acl_xattr_header *header = value; + const struct posix_acl_xattr_entry *entry = (const void *)(header + 1), *end; int count; struct posix_acl *acl; struct posix_acl_entry *acl_e; if (!value) return NULL; - if (size < sizeof(posix_acl_xattr_header)) + if (size < sizeof(struct posix_acl_xattr_header)) return ERR_PTR(-EINVAL); if (header->a_version != cpu_to_le32(POSIX_ACL_XATTR_VERSION)) return ERR_PTR(-EOPNOTSUPP); @@ -760,8 +760,8 @@ int posix_acl_to_xattr(struct user_namespace *user_ns, const struct posix_acl *acl, void *buffer, size_t size) { - posix_acl_xattr_header *ext_acl = (posix_acl_xattr_header *)buffer; - posix_acl_xattr_entry *ext_entry; + struct posix_acl_xattr_header *ext_acl = buffer; + struct posix_acl_xattr_entry *ext_entry; int real_size, n; real_size = posix_acl_xattr_size(acl->a_count); @@ -770,7 +770,7 @@ posix_acl_to_xattr(struct user_namespace *user_ns, const struct posix_acl *acl, if (real_size > size) return -ERANGE; - ext_entry = ext_acl->a_entries; + ext_entry = (void *)(ext_acl + 1); ext_acl->a_version = cpu_to_le32(POSIX_ACL_XATTR_VERSION); for (n=0; n < acl->a_count; n++, ext_entry++) { diff --git a/include/linux/posix_acl_xattr.h b/include/linux/posix_acl_xattr.h index e5e8ec40278d..d23d36842322 100644 --- a/include/linux/posix_acl_xattr.h +++ b/include/linux/posix_acl_xattr.h @@ -18,34 +18,33 @@ /* An undefined entry e_id value */ #define ACL_UNDEFINED_ID (-1) -typedef struct { +struct posix_acl_xattr_entry { __le16 e_tag; __le16 e_perm; __le32 e_id; -} posix_acl_xattr_entry; +}; -typedef struct { +struct posix_acl_xattr_header { __le32 a_version; - posix_acl_xattr_entry a_entries[0]; -} posix_acl_xattr_header; +}; static inline size_t posix_acl_xattr_size(int count) { - return (sizeof(posix_acl_xattr_header) + - (count * sizeof(posix_acl_xattr_entry))); + return (sizeof(struct posix_acl_xattr_header) + + (count * sizeof(struct posix_acl_xattr_entry))); } static inline int posix_acl_xattr_count(size_t size) { - if (size < sizeof(posix_acl_xattr_header)) + if (size < sizeof(struct posix_acl_xattr_header)) return -1; - size -= sizeof(posix_acl_xattr_header); - if (size % sizeof(posix_acl_xattr_entry)) + size -= sizeof(struct posix_acl_xattr_header); + if (size % sizeof(struct posix_acl_xattr_entry)) return -1; - return size / sizeof(posix_acl_xattr_entry); + return size / sizeof(struct posix_acl_xattr_entry); } #ifdef CONFIG_FS_POSIX_ACL -- 2.20.1