From mboxrd@z Thu Jan 1 00:00:00 1970 From: NeilBrown Date: Tue, 19 Feb 2019 11:09:05 +1100 Subject: [lustre-devel] [PATCH 12/37] lustre: remove unused function in linkea. In-Reply-To: <155053473693.24125.6976971762921761309.stgit@noble.brown> References: <155053473693.24125.6976971762921761309.stgit@noble.brown> Message-ID: <155053494549.24125.14755296858886216830.stgit@noble.brown> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: lustre-devel@lists.lustre.org Much of the linkea functionality is server-only. Keep the parts used on the client, but remove the rest. Signed-off-by: NeilBrown --- .../staging/lustre/lustre/include/lustre_linkea.h | 8 - drivers/staging/lustre/lustre/obdclass/linkea.c | 150 -------------------- 2 files changed, 1 insertion(+), 157 deletions(-) diff --git a/drivers/staging/lustre/lustre/include/lustre_linkea.h b/drivers/staging/lustre/lustre/include/lustre_linkea.h index 03db1511bfd3..a028d91dd151 100644 --- a/drivers/staging/lustre/lustre/include/lustre_linkea.h +++ b/drivers/staging/lustre/lustre/include/lustre_linkea.h @@ -55,17 +55,9 @@ struct linkea_data { }; int linkea_data_new(struct linkea_data *ldata, struct lu_buf *buf); -int linkea_init(struct linkea_data *ldata); int linkea_init_with_rec(struct linkea_data *ldata); void linkea_entry_unpack(const struct link_ea_entry *lee, int *reclen, struct lu_name *lname, struct lu_fid *pfid); -int linkea_entry_pack(struct link_ea_entry *lee, const struct lu_name *lname, - const struct lu_fid *pfid); -int linkea_add_buf(struct linkea_data *ldata, const struct lu_name *lname, - const struct lu_fid *pfid); -void linkea_del_buf(struct linkea_data *ldata, const struct lu_name *lname); -int linkea_links_find(struct linkea_data *ldata, const struct lu_name *lname, - const struct lu_fid *pfid); static inline void linkea_first_entry(struct linkea_data *ldata) { diff --git a/drivers/staging/lustre/lustre/obdclass/linkea.c b/drivers/staging/lustre/lustre/obdclass/linkea.c index 33594bd26794..b1aa80a73a2c 100644 --- a/drivers/staging/lustre/lustre/obdclass/linkea.c +++ b/drivers/staging/lustre/lustre/obdclass/linkea.c @@ -48,7 +48,7 @@ int linkea_data_new(struct linkea_data *ldata, struct lu_buf *buf) } EXPORT_SYMBOL(linkea_data_new); -int linkea_init(struct linkea_data *ldata) +static int linkea_init(struct linkea_data *ldata) { struct link_ea_header *leh; @@ -72,7 +72,6 @@ int linkea_init(struct linkea_data *ldata) ldata->ld_leh = leh; return 0; } -EXPORT_SYMBOL(linkea_init); int linkea_init_with_rec(struct linkea_data *ldata) { @@ -86,32 +85,6 @@ int linkea_init_with_rec(struct linkea_data *ldata) } EXPORT_SYMBOL(linkea_init_with_rec); -/** - * Pack a link_ea_entry. - * All elements are stored as chars to avoid alignment issues. - * Numbers are always big-endian - * \retval record length - */ -int linkea_entry_pack(struct link_ea_entry *lee, const struct lu_name *lname, - const struct lu_fid *pfid) -{ - struct lu_fid tmpfid; - int reclen; - - tmpfid = *pfid; - if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_LINKEA_CRASH)) - tmpfid.f_ver = ~0; - fid_cpu_to_be(&tmpfid, &tmpfid); - memcpy(&lee->lee_parent_fid, &tmpfid, sizeof(tmpfid)); - memcpy(lee->lee_name, lname->ln_name, lname->ln_namelen); - reclen = sizeof(struct link_ea_entry) + lname->ln_namelen; - - lee->lee_reclen[0] = (reclen >> 8) & 0xff; - lee->lee_reclen[1] = reclen & 0xff; - return reclen; -} -EXPORT_SYMBOL(linkea_entry_pack); - void linkea_entry_unpack(const struct link_ea_entry *lee, int *reclen, struct lu_name *lname, struct lu_fid *pfid) { @@ -126,124 +99,3 @@ void linkea_entry_unpack(const struct link_ea_entry *lee, int *reclen, } } EXPORT_SYMBOL(linkea_entry_unpack); - -/** - * Add a record to the end of link ea buf - **/ -int linkea_add_buf(struct linkea_data *ldata, const struct lu_name *lname, - const struct lu_fid *pfid) -{ - struct link_ea_header *leh = ldata->ld_leh; - int reclen; - - LASSERT(leh); - - if (!lname || !pfid) - return -EINVAL; - - reclen = lname->ln_namelen + sizeof(struct link_ea_entry); - if (unlikely(leh->leh_len + reclen > MAX_LINKEA_SIZE)) { - /* - * Use 32-bits to save the overflow time, although it will - * shrink the ktime_get_real_seconds() returned 64-bits value - * to 32-bits value, it is still quite large and can be used - * for about 140 years. That is enough. - */ - leh->leh_overflow_time = ktime_get_real_seconds(); - if (unlikely(leh->leh_overflow_time == 0)) - leh->leh_overflow_time++; - - CDEBUG(D_INODE, "No enough space to hold linkea entry '" DFID ": %.*s' at %u\n", - PFID(pfid), lname->ln_namelen, - lname->ln_name, leh->leh_overflow_time); - return 0; - } - - if (leh->leh_len + reclen > ldata->ld_buf->lb_len) { - /* Note: this never happens as MAX_LINKEA_SIZE is 4096, while - * the initial allocation is PAGE_SIZE. - */ - void *b = krealloc(ldata->ld_buf->lb_buf, leh->leh_len + reclen, GFP_NOFS); - if (!b) - return -ENOMEM; - - ldata->ld_buf->lb_len = leh->leh_len + reclen; - leh = ldata->ld_leh = ldata->ld_buf->lb_buf = b; - } - - ldata->ld_lee = ldata->ld_buf->lb_buf + leh->leh_len; - ldata->ld_reclen = linkea_entry_pack(ldata->ld_lee, lname, pfid); - leh->leh_len += ldata->ld_reclen; - leh->leh_reccount++; - CDEBUG(D_INODE, "New link_ea name '" DFID ":%.*s' is added\n", - PFID(pfid), lname->ln_namelen, lname->ln_name); - return 0; -} -EXPORT_SYMBOL(linkea_add_buf); - -/** Del the current record from the link ea buf */ -void linkea_del_buf(struct linkea_data *ldata, const struct lu_name *lname) -{ - LASSERT(ldata->ld_leh && ldata->ld_lee); - LASSERT(ldata->ld_leh->leh_reccount > 0); - - ldata->ld_leh->leh_reccount--; - ldata->ld_leh->leh_len -= ldata->ld_reclen; - memmove(ldata->ld_lee, (char *)ldata->ld_lee + ldata->ld_reclen, - (char *)ldata->ld_leh + ldata->ld_leh->leh_len - - (char *)ldata->ld_lee); - CDEBUG(D_INODE, "Old link_ea name '%.*s' is removed\n", - lname->ln_namelen, lname->ln_name); - - if ((char *)ldata->ld_lee >= ((char *)ldata->ld_leh + - ldata->ld_leh->leh_len)) - ldata->ld_lee = NULL; -} -EXPORT_SYMBOL(linkea_del_buf); - -/** - * Check if such a link exists in linkEA. - * - * \param ldata link data the search to be done on - * \param lname name in the parent's directory entry pointing to this object - * \param pfid parent fid the link to be found for - * - * \retval 0 success - * \retval -ENOENT link does not exist - * \retval -ve on error - */ -int linkea_links_find(struct linkea_data *ldata, const struct lu_name *lname, - const struct lu_fid *pfid) -{ - struct lu_name tmpname; - struct lu_fid tmpfid; - int count; - - LASSERT(ldata->ld_leh); - - /* link #0, if leh_reccount == 0 we skip the loop and return -ENOENT */ - if (likely(ldata->ld_leh->leh_reccount > 0)) - ldata->ld_lee = (struct link_ea_entry *)(ldata->ld_leh + 1); - - for (count = 0; count < ldata->ld_leh->leh_reccount; count++) { - linkea_entry_unpack(ldata->ld_lee, &ldata->ld_reclen, - &tmpname, &tmpfid); - if (tmpname.ln_namelen == lname->ln_namelen && - lu_fid_eq(&tmpfid, pfid) && - (strncmp(tmpname.ln_name, lname->ln_name, - tmpname.ln_namelen) == 0)) - break; - ldata->ld_lee = (struct link_ea_entry *)((char *)ldata->ld_lee + - ldata->ld_reclen); - } - - if (count == ldata->ld_leh->leh_reccount) { - CDEBUG(D_INODE, "Old link_ea name '%.*s' not found\n", - lname->ln_namelen, lname->ln_name); - ldata->ld_lee = NULL; - ldata->ld_reclen = 0; - return -ENOENT; - } - return 0; -} -EXPORT_SYMBOL(linkea_links_find);