From 307cf6e63cfa5025589ea1a06db44439a43819ff Mon Sep 17 00:00:00 2001 From: Steven Whitehouse Date: Wed, 26 Aug 2009 18:51:04 +0100 Subject: GFS2: Rename eattr.[ch] as xattr.[ch] Use the more conventional name for the extended attribute support code. Update all the places which care. Signed-off-by: Steven Whitehouse diff --git a/fs/gfs2/Makefile b/fs/gfs2/Makefile index 2a4fd89..21f7e46 100644 --- a/fs/gfs2/Makefile +++ b/fs/gfs2/Makefile @@ -1,6 +1,6 @@ EXTRA_CFLAGS := -I$(src) obj-$(CONFIG_GFS2_FS) += gfs2.o -gfs2-y := acl.o bmap.o dir.o eattr.o glock.o \ +gfs2-y := acl.o bmap.o dir.o xattr.o glock.o \ glops.o inode.o log.o lops.o main.o meta_io.o \ aops.o dentry.o export.o file.o \ ops_fstype.o ops_inode.o quota.o \ diff --git a/fs/gfs2/acl.c b/fs/gfs2/acl.c index f6777f1..3fc4e3a 100644 --- a/fs/gfs2/acl.c +++ b/fs/gfs2/acl.c @@ -19,7 +19,7 @@ #include "gfs2.h" #include "incore.h" #include "acl.h" -#include "eattr.h" +#include "xattr.h" #include "glock.h" #include "inode.h" #include "meta_io.h" diff --git a/fs/gfs2/eattr.c b/fs/gfs2/eattr.c deleted file mode 100644 index d9a9e26..0000000 --- a/fs/gfs2/eattr.c +++ /dev/null @@ -1,1558 +0,0 @@ -/* - * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. - * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. - * - * This copyrighted material is made available to anyone wishing to use, - * modify, copy, or redistribute it subject to the terms and conditions - * of the GNU General Public License version 2. - */ - -#include -#include -#include -#include -#include -#include -#include - -#include "gfs2.h" -#include "incore.h" -#include "acl.h" -#include "eattr.h" -#include "glock.h" -#include "inode.h" -#include "meta_io.h" -#include "quota.h" -#include "rgrp.h" -#include "trans.h" -#include "util.h" - -/** - * ea_calc_size - returns the acutal number of bytes the request will take up - * (not counting any unstuffed data blocks) - * @sdp: - * @er: - * @size: - * - * Returns: 1 if the EA should be stuffed - */ - -static int ea_calc_size(struct gfs2_sbd *sdp, unsigned int nsize, size_t dsize, - unsigned int *size) -{ - unsigned int jbsize = sdp->sd_jbsize; - - /* Stuffed */ - *size = ALIGN(sizeof(struct gfs2_ea_header) + nsize + dsize, 8); - - if (*size <= jbsize) - return 1; - - /* Unstuffed */ - *size = ALIGN(sizeof(struct gfs2_ea_header) + nsize + - (sizeof(__be64) * DIV_ROUND_UP(dsize, jbsize)), 8); - - return 0; -} - -static int ea_check_size(struct gfs2_sbd *sdp, unsigned int nsize, size_t dsize) -{ - unsigned int size; - - if (dsize > GFS2_EA_MAX_DATA_LEN) - return -ERANGE; - - ea_calc_size(sdp, nsize, dsize, &size); - - /* This can only happen with 512 byte blocks */ - if (size > sdp->sd_jbsize) - return -ERANGE; - - return 0; -} - -typedef int (*ea_call_t) (struct gfs2_inode *ip, struct buffer_head *bh, - struct gfs2_ea_header *ea, - struct gfs2_ea_header *prev, void *private); - -static int ea_foreach_i(struct gfs2_inode *ip, struct buffer_head *bh, - ea_call_t ea_call, void *data) -{ - struct gfs2_ea_header *ea, *prev = NULL; - int error = 0; - - if (gfs2_metatype_check(GFS2_SB(&ip->i_inode), bh, GFS2_METATYPE_EA)) - return -EIO; - - for (ea = GFS2_EA_BH2FIRST(bh);; prev = ea, ea = GFS2_EA2NEXT(ea)) { - if (!GFS2_EA_REC_LEN(ea)) - goto fail; - if (!(bh->b_data <= (char *)ea && (char *)GFS2_EA2NEXT(ea) <= - bh->b_data + bh->b_size)) - goto fail; - if (!GFS2_EATYPE_VALID(ea->ea_type)) - goto fail; - - error = ea_call(ip, bh, ea, prev, data); - if (error) - return error; - - if (GFS2_EA_IS_LAST(ea)) { - if ((char *)GFS2_EA2NEXT(ea) != - bh->b_data + bh->b_size) - goto fail; - break; - } - } - - return error; - -fail: - gfs2_consist_inode(ip); - return -EIO; -} - -static int ea_foreach(struct gfs2_inode *ip, ea_call_t ea_call, void *data) -{ - struct buffer_head *bh, *eabh; - __be64 *eablk, *end; - int error; - - error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT, &bh); - if (error) - return error; - - if (!(ip->i_diskflags & GFS2_DIF_EA_INDIRECT)) { - error = ea_foreach_i(ip, bh, ea_call, data); - goto out; - } - - if (gfs2_metatype_check(GFS2_SB(&ip->i_inode), bh, GFS2_METATYPE_IN)) { - error = -EIO; - goto out; - } - - eablk = (__be64 *)(bh->b_data + sizeof(struct gfs2_meta_header)); - end = eablk + GFS2_SB(&ip->i_inode)->sd_inptrs; - - for (; eablk < end; eablk++) { - u64 bn; - - if (!*eablk) - break; - bn = be64_to_cpu(*eablk); - - error = gfs2_meta_read(ip->i_gl, bn, DIO_WAIT, &eabh); - if (error) - break; - error = ea_foreach_i(ip, eabh, ea_call, data); - brelse(eabh); - if (error) - break; - } -out: - brelse(bh); - return error; -} - -struct ea_find { - int type; - const char *name; - size_t namel; - struct gfs2_ea_location *ef_el; -}; - -static int ea_find_i(struct gfs2_inode *ip, struct buffer_head *bh, - struct gfs2_ea_header *ea, struct gfs2_ea_header *prev, - void *private) -{ - struct ea_find *ef = private; - - if (ea->ea_type == GFS2_EATYPE_UNUSED) - return 0; - - if (ea->ea_type == ef->type) { - if (ea->ea_name_len == ef->namel && - !memcmp(GFS2_EA2NAME(ea), ef->name, ea->ea_name_len)) { - struct gfs2_ea_location *el = ef->ef_el; - get_bh(bh); - el->el_bh = bh; - el->el_ea = ea; - el->el_prev = prev; - return 1; - } - } - - return 0; -} - -int gfs2_ea_find(struct gfs2_inode *ip, int type, const char *name, - struct gfs2_ea_location *el) -{ - struct ea_find ef; - int error; - - ef.type = type; - ef.name = name; - ef.namel = strlen(name); - ef.ef_el = el; - - memset(el, 0, sizeof(struct gfs2_ea_location)); - - error = ea_foreach(ip, ea_find_i, &ef); - if (error > 0) - return 0; - - return error; -} - -/** - * ea_dealloc_unstuffed - - * @ip: - * @bh: - * @ea: - * @prev: - * @private: - * - * Take advantage of the fact that all unstuffed blocks are - * allocated from the same RG. But watch, this may not always - * be true. - * - * Returns: errno - */ - -static int ea_dealloc_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh, - struct gfs2_ea_header *ea, - struct gfs2_ea_header *prev, void *private) -{ - int *leave = private; - struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); - struct gfs2_rgrpd *rgd; - struct gfs2_holder rg_gh; - struct buffer_head *dibh; - __be64 *dataptrs; - u64 bn = 0; - u64 bstart = 0; - unsigned int blen = 0; - unsigned int blks = 0; - unsigned int x; - int error; - - if (GFS2_EA_IS_STUFFED(ea)) - return 0; - - dataptrs = GFS2_EA2DATAPTRS(ea); - for (x = 0; x < ea->ea_num_ptrs; x++, dataptrs++) { - if (*dataptrs) { - blks++; - bn = be64_to_cpu(*dataptrs); - } - } - if (!blks) - return 0; - - rgd = gfs2_blk2rgrpd(sdp, bn); - if (!rgd) { - gfs2_consist_inode(ip); - return -EIO; - } - - error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &rg_gh); - if (error) - return error; - - error = gfs2_trans_begin(sdp, rgd->rd_length + RES_DINODE + - RES_EATTR + RES_STATFS + RES_QUOTA, blks); - if (error) - goto out_gunlock; - - gfs2_trans_add_bh(ip->i_gl, bh, 1); - - dataptrs = GFS2_EA2DATAPTRS(ea); - for (x = 0; x < ea->ea_num_ptrs; x++, dataptrs++) { - if (!*dataptrs) - break; - bn = be64_to_cpu(*dataptrs); - - if (bstart + blen == bn) - blen++; - else { - if (bstart) - gfs2_free_meta(ip, bstart, blen); - bstart = bn; - blen = 1; - } - - *dataptrs = 0; - gfs2_add_inode_blocks(&ip->i_inode, -1); - } - if (bstart) - gfs2_free_meta(ip, bstart, blen); - - if (prev && !leave) { - u32 len; - - len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea); - prev->ea_rec_len = cpu_to_be32(len); - - if (GFS2_EA_IS_LAST(ea)) - prev->ea_flags |= GFS2_EAFLAG_LAST; - } else { - ea->ea_type = GFS2_EATYPE_UNUSED; - ea->ea_num_ptrs = 0; - } - - error = gfs2_meta_inode_buffer(ip, &dibh); - if (!error) { - ip->i_inode.i_ctime = CURRENT_TIME; - gfs2_trans_add_bh(ip->i_gl, dibh, 1); - gfs2_dinode_out(ip, dibh->b_data); - brelse(dibh); - } - - gfs2_trans_end(sdp); - -out_gunlock: - gfs2_glock_dq_uninit(&rg_gh); - return error; -} - -static int ea_remove_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh, - struct gfs2_ea_header *ea, - struct gfs2_ea_header *prev, int leave) -{ - struct gfs2_alloc *al; - int error; - - al = gfs2_alloc_get(ip); - if (!al) - return -ENOMEM; - - error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE); - if (error) - goto out_alloc; - - error = gfs2_rindex_hold(GFS2_SB(&ip->i_inode), &al->al_ri_gh); - if (error) - goto out_quota; - - error = ea_dealloc_unstuffed(ip, bh, ea, prev, (leave) ? &error : NULL); - - gfs2_glock_dq_uninit(&al->al_ri_gh); - -out_quota: - gfs2_quota_unhold(ip); -out_alloc: - gfs2_alloc_put(ip); - return error; -} - -struct ea_list { - struct gfs2_ea_request *ei_er; - unsigned int ei_size; -}; - -static inline unsigned int gfs2_ea_strlen(struct gfs2_ea_header *ea) -{ - switch (ea->ea_type) { - case GFS2_EATYPE_USR: - return 5 + ea->ea_name_len + 1; - case GFS2_EATYPE_SYS: - return 7 + ea->ea_name_len + 1; - case GFS2_EATYPE_SECURITY: - return 9 + ea->ea_name_len + 1; - default: - return 0; - } -} - -static int ea_list_i(struct gfs2_inode *ip, struct buffer_head *bh, - struct gfs2_ea_header *ea, struct gfs2_ea_header *prev, - void *private) -{ - struct ea_list *ei = private; - struct gfs2_ea_request *er = ei->ei_er; - unsigned int ea_size = gfs2_ea_strlen(ea); - - if (ea->ea_type == GFS2_EATYPE_UNUSED) - return 0; - - if (er->er_data_len) { - char *prefix = NULL; - unsigned int l = 0; - char c = 0; - - if (ei->ei_size + ea_size > er->er_data_len) - return -ERANGE; - - switch (ea->ea_type) { - case GFS2_EATYPE_USR: - prefix = "user."; - l = 5; - break; - case GFS2_EATYPE_SYS: - prefix = "system."; - l = 7; - break; - case GFS2_EATYPE_SECURITY: - prefix = "security."; - l = 9; - break; - } - - BUG_ON(l == 0); - - memcpy(er->er_data + ei->ei_size, prefix, l); - memcpy(er->er_data + ei->ei_size + l, GFS2_EA2NAME(ea), - ea->ea_name_len); - memcpy(er->er_data + ei->ei_size + ea_size - 1, &c, 1); - } - - ei->ei_size += ea_size; - - return 0; -} - -/** - * gfs2_listxattr - List gfs2 extended attributes - * @dentry: The dentry whose inode we are interested in - * @buffer: The buffer to write the results - * @size: The size of the buffer - * - * Returns: actual size of data on success, -errno on error - */ - -ssize_t gfs2_listxattr(struct dentry *dentry, char *buffer, size_t size) -{ - struct gfs2_inode *ip = GFS2_I(dentry->d_inode); - struct gfs2_ea_request er; - struct gfs2_holder i_gh; - int error; - - memset(&er, 0, sizeof(struct gfs2_ea_request)); - if (size) { - er.er_data = buffer; - er.er_data_len = size; - } - - error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh); - if (error) - return error; - - if (ip->i_eattr) { - struct ea_list ei = { .ei_er = &er, .ei_size = 0 }; - - error = ea_foreach(ip, ea_list_i, &ei); - if (!error) - error = ei.ei_size; - } - - gfs2_glock_dq_uninit(&i_gh); - - return error; -} - -/** - * ea_get_unstuffed - actually copies the unstuffed data into the - * request buffer - * @ip: The GFS2 inode - * @ea: The extended attribute header structure - * @data: The data to be copied - * - * Returns: errno - */ - -static int ea_get_unstuffed(struct gfs2_inode *ip, struct gfs2_ea_header *ea, - char *data) -{ - struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); - struct buffer_head **bh; - unsigned int amount = GFS2_EA_DATA_LEN(ea); - unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize); - __be64 *dataptrs = GFS2_EA2DATAPTRS(ea); - unsigned int x; - int error = 0; - - bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_NOFS); - if (!bh) - return -ENOMEM; - - for (x = 0; x < nptrs; x++) { - error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs), 0, - bh + x); - if (error) { - while (x--) - brelse(bh[x]); - goto out; - } - dataptrs++; - } - - for (x = 0; x < nptrs; x++) { - error = gfs2_meta_wait(sdp, bh[x]); - if (error) { - for (; x < nptrs; x++) - brelse(bh[x]); - goto out; - } - if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) { - for (; x < nptrs; x++) - brelse(bh[x]); - error = -EIO; - goto out; - } - - memcpy(data, bh[x]->b_data + sizeof(struct gfs2_meta_header), - (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize); - - amount -= sdp->sd_jbsize; - data += sdp->sd_jbsize; - - brelse(bh[x]); - } - -out: - kfree(bh); - return error; -} - -int gfs2_ea_get_copy(struct gfs2_inode *ip, struct gfs2_ea_location *el, - char *data, size_t size) -{ - int ret; - size_t len = GFS2_EA_DATA_LEN(el->el_ea); - if (len > size) - return -ERANGE; - - if (GFS2_EA_IS_STUFFED(el->el_ea)) { - memcpy(data, GFS2_EA2DATA(el->el_ea), len); - return len; - } - ret = ea_get_unstuffed(ip, el->el_ea, data); - if (ret < 0) - return ret; - return len; -} - -/** - * gfs2_xattr_get - Get a GFS2 extended attribute - * @inode: The inode - * @type: The type of extended attribute - * @name: The name of the extended attribute - * @buffer: The buffer to write the result into - * @size: The size of the buffer - * - * Returns: actual size of data on success, -errno on error - */ - -int gfs2_xattr_get(struct inode *inode, int type, const char *name, - void *buffer, size_t size) -{ - struct gfs2_inode *ip = GFS2_I(inode); - struct gfs2_ea_location el; - int error; - - if (!ip->i_eattr) - return -ENODATA; - if (strlen(name) > GFS2_EA_MAX_NAME_LEN) - return -EINVAL; - - error = gfs2_ea_find(ip, type, name, &el); - if (error) - return error; - if (!el.el_ea) - return -ENODATA; - if (size) - error = gfs2_ea_get_copy(ip, &el, buffer, size); - else - error = GFS2_EA_DATA_LEN(el.el_ea); - brelse(el.el_bh); - - return error; -} - -/** - * ea_alloc_blk - allocates a new block for extended attributes. - * @ip: A pointer to the inode that's getting extended attributes - * @bhp: Pointer to pointer to a struct buffer_head - * - * Returns: errno - */ - -static int ea_alloc_blk(struct gfs2_inode *ip, struct buffer_head **bhp) -{ - struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); - struct gfs2_ea_header *ea; - unsigned int n = 1; - u64 block; - int error; - - error = gfs2_alloc_block(ip, &block, &n); - if (error) - return error; - gfs2_trans_add_unrevoke(sdp, block, 1); - *bhp = gfs2_meta_new(ip->i_gl, block); - gfs2_trans_add_bh(ip->i_gl, *bhp, 1); - gfs2_metatype_set(*bhp, GFS2_METATYPE_EA, GFS2_FORMAT_EA); - gfs2_buffer_clear_tail(*bhp, sizeof(struct gfs2_meta_header)); - - ea = GFS2_EA_BH2FIRST(*bhp); - ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize); - ea->ea_type = GFS2_EATYPE_UNUSED; - ea->ea_flags = GFS2_EAFLAG_LAST; - ea->ea_num_ptrs = 0; - - gfs2_add_inode_blocks(&ip->i_inode, 1); - - return 0; -} - -/** - * ea_write - writes the request info to an ea, creating new blocks if - * necessary - * @ip: inode that is being modified - * @ea: the location of the new ea in a block - * @er: the write request - * - * Note: does not update ea_rec_len or the GFS2_EAFLAG_LAST bin of ea_flags - * - * returns : errno - */ - -static int ea_write(struct gfs2_inode *ip, struct gfs2_ea_header *ea, - struct gfs2_ea_request *er) -{ - struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); - int error; - - ea->ea_data_len = cpu_to_be32(er->er_data_len); - ea->ea_name_len = er->er_name_len; - ea->ea_type = er->er_type; - ea->__pad = 0; - - memcpy(GFS2_EA2NAME(ea), er->er_name, er->er_name_len); - - if (GFS2_EAREQ_SIZE_STUFFED(er) <= sdp->sd_jbsize) { - ea->ea_num_ptrs = 0; - memcpy(GFS2_EA2DATA(ea), er->er_data, er->er_data_len); - } else { - __be64 *dataptr = GFS2_EA2DATAPTRS(ea); - const char *data = er->er_data; - unsigned int data_len = er->er_data_len; - unsigned int copy; - unsigned int x; - - ea->ea_num_ptrs = DIV_ROUND_UP(er->er_data_len, sdp->sd_jbsize); - for (x = 0; x < ea->ea_num_ptrs; x++) { - struct buffer_head *bh; - u64 block; - int mh_size = sizeof(struct gfs2_meta_header); - unsigned int n = 1; - - error = gfs2_alloc_block(ip, &block, &n); - if (error) - return error; - gfs2_trans_add_unrevoke(sdp, block, 1); - bh = gfs2_meta_new(ip->i_gl, block); - gfs2_trans_add_bh(ip->i_gl, bh, 1); - gfs2_metatype_set(bh, GFS2_METATYPE_ED, GFS2_FORMAT_ED); - - gfs2_add_inode_blocks(&ip->i_inode, 1); - - copy = data_len > sdp->sd_jbsize ? sdp->sd_jbsize : - data_len; - memcpy(bh->b_data + mh_size, data, copy); - if (copy < sdp->sd_jbsize) - memset(bh->b_data + mh_size + copy, 0, - sdp->sd_jbsize - copy); - - *dataptr++ = cpu_to_be64(bh->b_blocknr); - data += copy; - data_len -= copy; - - brelse(bh); - } - - gfs2_assert_withdraw(sdp, !data_len); - } - - return 0; -} - -typedef int (*ea_skeleton_call_t) (struct gfs2_inode *ip, - struct gfs2_ea_request *er, void *private); - -static int ea_alloc_skeleton(struct gfs2_inode *ip, struct gfs2_ea_request *er, - unsigned int blks, - ea_skeleton_call_t skeleton_call, void *private) -{ - struct gfs2_alloc *al; - struct buffer_head *dibh; - int error; - - al = gfs2_alloc_get(ip); - if (!al) - return -ENOMEM; - - error = gfs2_quota_lock_check(ip); - if (error) - goto out; - - al->al_requested = blks; - - error = gfs2_inplace_reserve(ip); - if (error) - goto out_gunlock_q; - - error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), - blks + al->al_rgd->rd_length + - RES_DINODE + RES_STATFS + RES_QUOTA, 0); - if (error) - goto out_ipres; - - error = skeleton_call(ip, er, private); - if (error) - goto out_end_trans; - - error = gfs2_meta_inode_buffer(ip, &dibh); - if (!error) { - ip->i_inode.i_ctime = CURRENT_TIME; - gfs2_trans_add_bh(ip->i_gl, dibh, 1); - gfs2_dinode_out(ip, dibh->b_data); - brelse(dibh); - } - -out_end_trans: - gfs2_trans_end(GFS2_SB(&ip->i_inode)); -out_ipres: - gfs2_inplace_release(ip); -out_gunlock_q: - gfs2_quota_unlock(ip); -out: - gfs2_alloc_put(ip); - return error; -} - -static int ea_init_i(struct gfs2_inode *ip, struct gfs2_ea_request *er, - void *private) -{ - struct buffer_head *bh; - int error; - - error = ea_alloc_blk(ip, &bh); - if (error) - return error; - - ip->i_eattr = bh->b_blocknr; - error = ea_write(ip, GFS2_EA_BH2FIRST(bh), er); - - brelse(bh); - - return error; -} - -/** - * ea_init - initializes a new eattr block - * @ip: - * @er: - * - * Returns: errno - */ - -static int ea_init(struct gfs2_inode *ip, int type, const char *name, - const void *data, size_t size) -{ - struct gfs2_ea_request er; - unsigned int jbsize = GFS2_SB(&ip->i_inode)->sd_jbsize; - unsigned int blks = 1; - - er.er_type = type; - er.er_name = name; - er.er_name_len = strlen(name); - er.er_data = (void *)data; - er.er_data_len = size; - - if (GFS2_EAREQ_SIZE_STUFFED(&er) > jbsize) - blks += DIV_ROUND_UP(er.er_data_len, jbsize); - - return ea_alloc_skeleton(ip, &er, blks, ea_init_i, NULL); -} - -static struct gfs2_ea_header *ea_split_ea(struct gfs2_ea_header *ea) -{ - u32 ea_size = GFS2_EA_SIZE(ea); - struct gfs2_ea_header *new = (struct gfs2_ea_header *)((char *)ea + - ea_size); - u32 new_size = GFS2_EA_REC_LEN(ea) - ea_size; - int last = ea->ea_flags & GFS2_EAFLAG_LAST; - - ea->ea_rec_len = cpu_to_be32(ea_size); - ea->ea_flags ^= last; - - new->ea_rec_len = cpu_to_be32(new_size); - new->ea_flags = last; - - return new; -} - -static void ea_set_remove_stuffed(struct gfs2_inode *ip, - struct gfs2_ea_location *el) -{ - struct gfs2_ea_header *ea = el->el_ea; - struct gfs2_ea_header *prev = el->el_prev; - u32 len; - - gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1); - - if (!prev || !GFS2_EA_IS_STUFFED(ea)) { - ea->ea_type = GFS2_EATYPE_UNUSED; - return; - } else if (GFS2_EA2NEXT(prev) != ea) { - prev = GFS2_EA2NEXT(prev); - gfs2_assert_withdraw(GFS2_SB(&ip->i_inode), GFS2_EA2NEXT(prev) == ea); - } - - len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea); - prev->ea_rec_len = cpu_to_be32(len); - - if (GFS2_EA_IS_LAST(ea)) - prev->ea_flags |= GFS2_EAFLAG_LAST; -} - -struct ea_set { - int ea_split; - - struct gfs2_ea_request *es_er; - struct gfs2_ea_location *es_el; - - struct buffer_head *es_bh; - struct gfs2_ea_header *es_ea; -}; - -static int ea_set_simple_noalloc(struct gfs2_inode *ip, struct buffer_head *bh, - struct gfs2_ea_header *ea, struct ea_set *es) -{ - struct gfs2_ea_request *er = es->es_er; - struct buffer_head *dibh; - int error; - - error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + 2 * RES_EATTR, 0); - if (error) - return error; - - gfs2_trans_add_bh(ip->i_gl, bh, 1); - - if (es->ea_split) - ea = ea_split_ea(ea); - - ea_write(ip, ea, er); - - if (es->es_el) - ea_set_remove_stuffed(ip, es->es_el); - - error = gfs2_meta_inode_buffer(ip, &dibh); - if (error) - goto out; - ip->i_inode.i_ctime = CURRENT_TIME; - gfs2_trans_add_bh(ip->i_gl, dibh, 1); - gfs2_dinode_out(ip, dibh->b_data); - brelse(dibh); -out: - gfs2_trans_end(GFS2_SB(&ip->i_inode)); - return error; -} - -static int ea_set_simple_alloc(struct gfs2_inode *ip, - struct gfs2_ea_request *er, void *private) -{ - struct ea_set *es = private; - struct gfs2_ea_header *ea = es->es_ea; - int error; - - gfs2_trans_add_bh(ip->i_gl, es->es_bh, 1); - - if (es->ea_split) - ea = ea_split_ea(ea); - - error = ea_write(ip, ea, er); - if (error) - return error; - - if (es->es_el) - ea_set_remove_stuffed(ip, es->es_el); - - return 0; -} - -static int ea_set_simple(struct gfs2_inode *ip, struct buffer_head *bh, - struct gfs2_ea_header *ea, struct gfs2_ea_header *prev, - void *private) -{ - struct ea_set *es = private; - unsigned int size; - int stuffed; - int error; - - stuffed = ea_calc_size(GFS2_SB(&ip->i_inode), es->es_er->er_name_len, - es->es_er->er_data_len, &size); - - if (ea->ea_type == GFS2_EATYPE_UNUSED) { - if (GFS2_EA_REC_LEN(ea) < size) - return 0; - if (!GFS2_EA_IS_STUFFED(ea)) { - error = ea_remove_unstuffed(ip, bh, ea, prev, 1); - if (error) - return error; - } - es->ea_split = 0; - } else if (GFS2_EA_REC_LEN(ea) - GFS2_EA_SIZE(ea) >= size) - es->ea_split = 1; - else - return 0; - - if (stuffed) { - error = ea_set_simple_noalloc(ip, bh, ea, es); - if (error) - return error; - } else { - unsigned int blks; - - es->es_bh = bh; - es->es_ea = ea; - blks = 2 + DIV_ROUND_UP(es->es_er->er_data_len, - GFS2_SB(&ip->i_inode)->sd_jbsize); - - error = ea_alloc_skeleton(ip, es->es_er, blks, - ea_set_simple_alloc, es); - if (error) - return error; - } - - return 1; -} - -static int ea_set_block(struct gfs2_inode *ip, struct gfs2_ea_request *er, - void *private) -{ - struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); - struct buffer_head *indbh, *newbh; - __be64 *eablk; - int error; - int mh_size = sizeof(struct gfs2_meta_header); - - if (ip->i_diskflags & GFS2_DIF_EA_INDIRECT) { - __be64 *end; - - error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT, - &indbh); - if (error) - return error; - - if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) { - error = -EIO; - goto out; - } - - eablk = (__be64 *)(indbh->b_data + mh_size); - end = eablk + sdp->sd_inptrs; - - for (; eablk < end; eablk++) - if (!*eablk) - break; - - if (eablk == end) { - error = -ENOSPC; - goto out; - } - - gfs2_trans_add_bh(ip->i_gl, indbh, 1); - } else { - u64 blk; - unsigned int n = 1; - error = gfs2_alloc_block(ip, &blk, &n); - if (error) - return error; - gfs2_trans_add_unrevoke(sdp, blk, 1); - indbh = gfs2_meta_new(ip->i_gl, blk); - gfs2_trans_add_bh(ip->i_gl, indbh, 1); - gfs2_metatype_set(indbh, GFS2_METATYPE_IN, GFS2_FORMAT_IN); - gfs2_buffer_clear_tail(indbh, mh_size); - - eablk = (__be64 *)(indbh->b_data + mh_size); - *eablk = cpu_to_be64(ip->i_eattr); - ip->i_eattr = blk; - ip->i_diskflags |= GFS2_DIF_EA_INDIRECT; - gfs2_add_inode_blocks(&ip->i_inode, 1); - - eablk++; - } - - error = ea_alloc_blk(ip, &newbh); - if (error) - goto out; - - *eablk = cpu_to_be64((u64)newbh->b_blocknr); - error = ea_write(ip, GFS2_EA_BH2FIRST(newbh), er); - brelse(newbh); - if (error) - goto out; - - if (private) - ea_set_remove_stuffed(ip, private); - -out: - brelse(indbh); - return error; -} - -static int ea_set_i(struct gfs2_inode *ip, int type, const char *name, - const void *value, size_t size, struct gfs2_ea_location *el) -{ - struct gfs2_ea_request er; - struct ea_set es; - unsigned int blks = 2; - int error; - - er.er_type = type; - er.er_name = name; - er.er_data = (void *)value; - er.er_name_len = strlen(name); - er.er_data_len = size; - - memset(&es, 0, sizeof(struct ea_set)); - es.es_er = &er; - es.es_el = el; - - error = ea_foreach(ip, ea_set_simple, &es); - if (error > 0) - return 0; - if (error) - return error; - - if (!(ip->i_diskflags & GFS2_DIF_EA_INDIRECT)) - blks++; - if (GFS2_EAREQ_SIZE_STUFFED(&er) > GFS2_SB(&ip->i_inode)->sd_jbsize) - blks += DIV_ROUND_UP(er.er_data_len, GFS2_SB(&ip->i_inode)->sd_jbsize); - - return ea_alloc_skeleton(ip, &er, blks, ea_set_block, el); -} - -static int ea_set_remove_unstuffed(struct gfs2_inode *ip, - struct gfs2_ea_location *el) -{ - if (el->el_prev && GFS2_EA2NEXT(el->el_prev) != el->el_ea) { - el->el_prev = GFS2_EA2NEXT(el->el_prev); - gfs2_assert_withdraw(GFS2_SB(&ip->i_inode), - GFS2_EA2NEXT(el->el_prev) == el->el_ea); - } - - return ea_remove_unstuffed(ip, el->el_bh, el->el_ea, el->el_prev,0); -} - -static int ea_remove_stuffed(struct gfs2_inode *ip, struct gfs2_ea_location *el) -{ - struct gfs2_ea_header *ea = el->el_ea; - struct gfs2_ea_header *prev = el->el_prev; - struct buffer_head *dibh; - int error; - - error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + RES_EATTR, 0); - if (error) - return error; - - gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1); - - if (prev) { - u32 len; - - len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea); - prev->ea_rec_len = cpu_to_be32(len); - - if (GFS2_EA_IS_LAST(ea)) - prev->ea_flags |= GFS2_EAFLAG_LAST; - } else { - ea->ea_type = GFS2_EATYPE_UNUSED; - } - - error = gfs2_meta_inode_buffer(ip, &dibh); - if (!error) { - ip->i_inode.i_ctime = CURRENT_TIME; - gfs2_trans_add_bh(ip->i_gl, dibh, 1); - gfs2_dinode_out(ip, dibh->b_data); - brelse(dibh); - } - - gfs2_trans_end(GFS2_SB(&ip->i_inode)); - - return error; -} - -/** - * gfs2_xattr_remove - Remove a GFS2 extended attribute - * @inode: The inode - * @type: The type of the extended attribute - * @name: The name of the extended attribute - * - * This is not called directly by the VFS since we use the (common) - * scheme of making a "set with NULL data" mean a remove request. Note - * that this is different from a set with zero length data. - * - * Returns: 0, or errno on failure - */ - -static int gfs2_xattr_remove(struct inode *inode, int type, const char *name) -{ - struct gfs2_inode *ip = GFS2_I(inode); - struct gfs2_ea_location el; - int error; - - if (!ip->i_eattr) - return -ENODATA; - - error = gfs2_ea_find(ip, type, name, &el); - if (error) - return error; - if (!el.el_ea) - return -ENODATA; - - if (GFS2_EA_IS_STUFFED(el.el_ea)) - error = ea_remove_stuffed(ip, &el); - else - error = ea_remove_unstuffed(ip, el.el_bh, el.el_ea, el.el_prev, 0); - - brelse(el.el_bh); - - return error; -} - -/** - * gfs2_xattr_set - Set (or remove) a GFS2 extended attribute - * @inode: The inode - * @type: The type of the extended attribute - * @name: The name of the extended attribute - * @value: The value of the extended attribute (NULL for remove) - * @size: The size of the @value argument - * @flags: Create or Replace - * - * See gfs2_xattr_remove() for details of the removal of xattrs. - * - * Returns: 0 or errno on failure - */ - -int gfs2_xattr_set(struct inode *inode, int type, const char *name, - const void *value, size_t size, int flags) -{ - struct gfs2_sbd *sdp = GFS2_SB(inode); - struct gfs2_inode *ip = GFS2_I(inode); - struct gfs2_ea_location el; - unsigned int namel = strlen(name); - int error; - - if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) - return -EPERM; - if (namel > GFS2_EA_MAX_NAME_LEN) - return -ERANGE; - - if (value == NULL) - return gfs2_xattr_remove(inode, type, name); - - if (ea_check_size(sdp, namel, size)) - return -ERANGE; - - if (!ip->i_eattr) { - if (flags & XATTR_REPLACE) - return -ENODATA; - return ea_init(ip, type, name, value, size); - } - - error = gfs2_ea_find(ip, type, name, &el); - if (error) - return error; - - if (el.el_ea) { - if (ip->i_diskflags & GFS2_DIF_APPENDONLY) { - brelse(el.el_bh); - return -EPERM; - } - - error = -EEXIST; - if (!(flags & XATTR_CREATE)) { - int unstuffed = !GFS2_EA_IS_STUFFED(el.el_ea); - error = ea_set_i(ip, type, name, value, size, &el); - if (!error && unstuffed) - ea_set_remove_unstuffed(ip, &el); - } - - brelse(el.el_bh); - return error; - } - - error = -ENODATA; - if (!(flags & XATTR_REPLACE)) - error = ea_set_i(ip, type, name, value, size, NULL); - - return error; -} - -static int ea_acl_chmod_unstuffed(struct gfs2_inode *ip, - struct gfs2_ea_header *ea, char *data) -{ - struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); - struct buffer_head **bh; - unsigned int amount = GFS2_EA_DATA_LEN(ea); - unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize); - __be64 *dataptrs = GFS2_EA2DATAPTRS(ea); - unsigned int x; - int error; - - bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_NOFS); - if (!bh) - return -ENOMEM; - - error = gfs2_trans_begin(sdp, nptrs + RES_DINODE, 0); - if (error) - goto out; - - for (x = 0; x < nptrs; x++) { - error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs), 0, - bh + x); - if (error) { - while (x--) - brelse(bh[x]); - goto fail; - } - dataptrs++; - } - - for (x = 0; x < nptrs; x++) { - error = gfs2_meta_wait(sdp, bh[x]); - if (error) { - for (; x < nptrs; x++) - brelse(bh[x]); - goto fail; - } - if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) { - for (; x < nptrs; x++) - brelse(bh[x]); - error = -EIO; - goto fail; - } - - gfs2_trans_add_bh(ip->i_gl, bh[x], 1); - - memcpy(bh[x]->b_data + sizeof(struct gfs2_meta_header), data, - (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize); - - amount -= sdp->sd_jbsize; - data += sdp->sd_jbsize; - - brelse(bh[x]); - } - -out: - kfree(bh); - return error; - -fail: - gfs2_trans_end(sdp); - kfree(bh); - return error; -} - -int gfs2_ea_acl_chmod(struct gfs2_inode *ip, struct gfs2_ea_location *el, - struct iattr *attr, char *data) -{ - struct buffer_head *dibh; - int error; - - if (GFS2_EA_IS_STUFFED(el->el_ea)) { - error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + RES_EATTR, 0); - if (error) - return error; - - gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1); - memcpy(GFS2_EA2DATA(el->el_ea), data, - GFS2_EA_DATA_LEN(el->el_ea)); - } else - error = ea_acl_chmod_unstuffed(ip, el->el_ea, data); - - if (error) - return error; - - error = gfs2_meta_inode_buffer(ip, &dibh); - if (!error) { - error = inode_setattr(&ip->i_inode, attr); - gfs2_assert_warn(GFS2_SB(&ip->i_inode), !error); - gfs2_trans_add_bh(ip->i_gl, dibh, 1); - gfs2_dinode_out(ip, dibh->b_data); - brelse(dibh); - } - - gfs2_trans_end(GFS2_SB(&ip->i_inode)); - - return error; -} - -static int ea_dealloc_indirect(struct gfs2_inode *ip) -{ - struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); - struct gfs2_rgrp_list rlist; - struct buffer_head *indbh, *dibh; - __be64 *eablk, *end; - unsigned int rg_blocks = 0; - u64 bstart = 0; - unsigned int blen = 0; - unsigned int blks = 0; - unsigned int x; - int error; - - memset(&rlist, 0, sizeof(struct gfs2_rgrp_list)); - - error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT, &indbh); - if (error) - return error; - - if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) { - error = -EIO; - goto out; - } - - eablk = (__be64 *)(indbh->b_data + sizeof(struct gfs2_meta_header)); - end = eablk + sdp->sd_inptrs; - - for (; eablk < end; eablk++) { - u64 bn; - - if (!*eablk) - break; - bn = be64_to_cpu(*eablk); - - if (bstart + blen == bn) - blen++; - else { - if (bstart) - gfs2_rlist_add(sdp, &rlist, bstart); - bstart = bn; - blen = 1; - } - blks++; - } - if (bstart) - gfs2_rlist_add(sdp, &rlist, bstart); - else - goto out; - - gfs2_rlist_alloc(&rlist, LM_ST_EXCLUSIVE); - - for (x = 0; x < rlist.rl_rgrps; x++) { - struct gfs2_rgrpd *rgd; - rgd = rlist.rl_ghs[x].gh_gl->gl_object; - rg_blocks += rgd->rd_length; - } - - error = gfs2_glock_nq_m(rlist.rl_rgrps, rlist.rl_ghs); - if (error) - goto out_rlist_free; - - error = gfs2_trans_begin(sdp, rg_blocks + RES_DINODE + RES_INDIRECT + - RES_STATFS + RES_QUOTA, blks); - if (error) - goto out_gunlock; - - gfs2_trans_add_bh(ip->i_gl, indbh, 1); - - eablk = (__be64 *)(indbh->b_data + sizeof(struct gfs2_meta_header)); - bstart = 0; - blen = 0; - - for (; eablk < end; eablk++) { - u64 bn; - - if (!*eablk) - break; - bn = be64_to_cpu(*eablk); - - if (bstart + blen == bn) - blen++; - else { - if (bstart) - gfs2_free_meta(ip, bstart, blen); - bstart = bn; - blen = 1; - } - - *eablk = 0; - gfs2_add_inode_blocks(&ip->i_inode, -1); - } - if (bstart) - gfs2_free_meta(ip, bstart, blen); - - ip->i_diskflags &= ~GFS2_DIF_EA_INDIRECT; - - error = gfs2_meta_inode_buffer(ip, &dibh); - if (!error) { - gfs2_trans_add_bh(ip->i_gl, dibh, 1); - gfs2_dinode_out(ip, dibh->b_data); - brelse(dibh); - } - - gfs2_trans_end(sdp); - -out_gunlock: - gfs2_glock_dq_m(rlist.rl_rgrps, rlist.rl_ghs); -out_rlist_free: - gfs2_rlist_free(&rlist); -out: - brelse(indbh); - return error; -} - -static int ea_dealloc_block(struct gfs2_inode *ip) -{ - struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); - struct gfs2_alloc *al = ip->i_alloc; - struct gfs2_rgrpd *rgd; - struct buffer_head *dibh; - int error; - - rgd = gfs2_blk2rgrpd(sdp, ip->i_eattr); - if (!rgd) { - gfs2_consist_inode(ip); - return -EIO; - } - - error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, - &al->al_rgd_gh); - if (error) - return error; - - error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_DINODE + RES_STATFS + - RES_QUOTA, 1); - if (error) - goto out_gunlock; - - gfs2_free_meta(ip, ip->i_eattr, 1); - - ip->i_eattr = 0; - gfs2_add_inode_blocks(&ip->i_inode, -1); - - error = gfs2_meta_inode_buffer(ip, &dibh); - if (!error) { - gfs2_trans_add_bh(ip->i_gl, dibh, 1); - gfs2_dinode_out(ip, dibh->b_data); - brelse(dibh); - } - - gfs2_trans_end(sdp); - -out_gunlock: - gfs2_glock_dq_uninit(&al->al_rgd_gh); - return error; -} - -/** - * gfs2_ea_dealloc - deallocate the extended attribute fork - * @ip: the inode - * - * Returns: errno - */ - -int gfs2_ea_dealloc(struct gfs2_inode *ip) -{ - struct gfs2_alloc *al; - int error; - - al = gfs2_alloc_get(ip); - if (!al) - return -ENOMEM; - - error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE); - if (error) - goto out_alloc; - - error = gfs2_rindex_hold(GFS2_SB(&ip->i_inode), &al->al_ri_gh); - if (error) - goto out_quota; - - error = ea_foreach(ip, ea_dealloc_unstuffed, NULL); - if (error) - goto out_rindex; - - if (ip->i_diskflags & GFS2_DIF_EA_INDIRECT) { - error = ea_dealloc_indirect(ip); - if (error) - goto out_rindex; - } - - error = ea_dealloc_block(ip); - -out_rindex: - gfs2_glock_dq_uninit(&al->al_ri_gh); -out_quota: - gfs2_quota_unhold(ip); -out_alloc: - gfs2_alloc_put(ip); - return error; -} - -static int gfs2_xattr_user_get(struct inode *inode, const char *name, - void *buffer, size_t size) -{ - return gfs2_xattr_get(inode, GFS2_EATYPE_USR, name, buffer, size); -} - -static int gfs2_xattr_user_set(struct inode *inode, const char *name, - const void *value, size_t size, int flags) -{ - return gfs2_xattr_set(inode, GFS2_EATYPE_USR, name, value, size, flags); -} - -static int gfs2_xattr_system_get(struct inode *inode, const char *name, - void *buffer, size_t size) -{ - return gfs2_xattr_get(inode, GFS2_EATYPE_SYS, name, buffer, size); -} - -static int gfs2_xattr_system_set(struct inode *inode, const char *name, - const void *value, size_t size, int flags) -{ - return gfs2_xattr_set(inode, GFS2_EATYPE_SYS, name, value, size, flags); -} - -static int gfs2_xattr_security_get(struct inode *inode, const char *name, - void *buffer, size_t size) -{ - return gfs2_xattr_get(inode, GFS2_EATYPE_SECURITY, name, buffer, size); -} - -static int gfs2_xattr_security_set(struct inode *inode, const char *name, - const void *value, size_t size, int flags) -{ - return gfs2_xattr_set(inode, GFS2_EATYPE_SECURITY, name, value, size, flags); -} - -static struct xattr_handler gfs2_xattr_user_handler = { - .prefix = XATTR_USER_PREFIX, - .get = gfs2_xattr_user_get, - .set = gfs2_xattr_user_set, -}; - -static struct xattr_handler gfs2_xattr_security_handler = { - .prefix = XATTR_SECURITY_PREFIX, - .get = gfs2_xattr_security_get, - .set = gfs2_xattr_security_set, -}; - -static struct xattr_handler gfs2_xattr_system_handler = { - .prefix = XATTR_SYSTEM_PREFIX, - .get = gfs2_xattr_system_get, - .set = gfs2_xattr_system_set, -}; - -struct xattr_handler *gfs2_xattr_handlers[] = { - &gfs2_xattr_user_handler, - &gfs2_xattr_security_handler, - &gfs2_xattr_system_handler, - NULL, -}; - diff --git a/fs/gfs2/eattr.h b/fs/gfs2/eattr.h deleted file mode 100644 index 4040a18..0000000 --- a/fs/gfs2/eattr.h +++ /dev/null @@ -1,72 +0,0 @@ -/* - * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. - * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. - * - * This copyrighted material is made available to anyone wishing to use, - * modify, copy, or redistribute it subject to the terms and conditions - * of the GNU General Public License version 2. - */ - -#ifndef __EATTR_DOT_H__ -#define __EATTR_DOT_H__ - -struct gfs2_inode; -struct iattr; - -#define GFS2_EA_REC_LEN(ea) be32_to_cpu((ea)->ea_rec_len) -#define GFS2_EA_DATA_LEN(ea) be32_to_cpu((ea)->ea_data_len) - -#define GFS2_EA_SIZE(ea) \ -ALIGN(sizeof(struct gfs2_ea_header) + (ea)->ea_name_len + \ - ((GFS2_EA_IS_STUFFED(ea)) ? GFS2_EA_DATA_LEN(ea) : \ - (sizeof(__be64) * (ea)->ea_num_ptrs)), 8) - -#define GFS2_EA_IS_STUFFED(ea) (!(ea)->ea_num_ptrs) -#define GFS2_EA_IS_LAST(ea) ((ea)->ea_flags & GFS2_EAFLAG_LAST) - -#define GFS2_EAREQ_SIZE_STUFFED(er) \ -ALIGN(sizeof(struct gfs2_ea_header) + (er)->er_name_len + (er)->er_data_len, 8) - -#define GFS2_EA2NAME(ea) ((char *)((struct gfs2_ea_header *)(ea) + 1)) -#define GFS2_EA2DATA(ea) (GFS2_EA2NAME(ea) + (ea)->ea_name_len) - -#define GFS2_EA2DATAPTRS(ea) \ -((__be64 *)(GFS2_EA2NAME(ea) + ALIGN((ea)->ea_name_len, 8))) - -#define GFS2_EA2NEXT(ea) \ -((struct gfs2_ea_header *)((char *)(ea) + GFS2_EA_REC_LEN(ea))) - -#define GFS2_EA_BH2FIRST(bh) \ -((struct gfs2_ea_header *)((bh)->b_data + sizeof(struct gfs2_meta_header))) - -struct gfs2_ea_request { - const char *er_name; - char *er_data; - unsigned int er_name_len; - unsigned int er_data_len; - unsigned int er_type; /* GFS2_EATYPE_... */ -}; - -struct gfs2_ea_location { - struct buffer_head *el_bh; - struct gfs2_ea_header *el_ea; - struct gfs2_ea_header *el_prev; -}; - -extern int gfs2_xattr_get(struct inode *inode, int type, const char *name, - void *buffer, size_t size); -extern int gfs2_xattr_set(struct inode *inode, int type, const char *name, - const void *value, size_t size, int flags); -extern ssize_t gfs2_listxattr(struct dentry *dentry, char *buffer, size_t size); -extern int gfs2_ea_dealloc(struct gfs2_inode *ip); - -/* Exported to acl.c */ - -extern int gfs2_ea_find(struct gfs2_inode *ip, int type, const char *name, - struct gfs2_ea_location *el); -extern int gfs2_ea_get_copy(struct gfs2_inode *ip, struct gfs2_ea_location *el, - char *data, size_t size); -extern int gfs2_ea_acl_chmod(struct gfs2_inode *ip, struct gfs2_ea_location *el, - struct iattr *attr, char *data); - -#endif /* __EATTR_DOT_H__ */ diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c index f936d2d..4f5e442 100644 --- a/fs/gfs2/inode.c +++ b/fs/gfs2/inode.c @@ -24,7 +24,7 @@ #include "acl.h" #include "bmap.h" #include "dir.h" -#include "eattr.h" +#include "xattr.h" #include "glock.h" #include "glops.h" #include "inode.h" diff --git a/fs/gfs2/ops_inode.c b/fs/gfs2/ops_inode.c index 1ee0c26..c3ac180 100644 --- a/fs/gfs2/ops_inode.c +++ b/fs/gfs2/ops_inode.c @@ -26,7 +26,7 @@ #include "acl.h" #include "bmap.h" #include "dir.h" -#include "eattr.h" +#include "xattr.h" #include "glock.h" #include "inode.h" #include "meta_io.h" diff --git a/fs/gfs2/super.c b/fs/gfs2/super.c index 7a5c128..2e78a3f 100644 --- a/fs/gfs2/super.c +++ b/fs/gfs2/super.c @@ -38,7 +38,7 @@ #include "trans.h" #include "util.h" #include "sys.h" -#include "eattr.h" +#include "xattr.h" #define args_neq(a1, a2, x) ((a1)->ar_##x != (a2)->ar_##x) diff --git a/fs/gfs2/xattr.c b/fs/gfs2/xattr.c new file mode 100644 index 0000000..34ae9ba --- /dev/null +++ b/fs/gfs2/xattr.c @@ -0,0 +1,1558 @@ +/* + * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. + * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. + * + * This copyrighted material is made available to anyone wishing to use, + * modify, copy, or redistribute it subject to the terms and conditions + * of the GNU General Public License version 2. + */ + +#include +#include +#include +#include +#include +#include +#include + +#include "gfs2.h" +#include "incore.h" +#include "acl.h" +#include "xattr.h" +#include "glock.h" +#include "inode.h" +#include "meta_io.h" +#include "quota.h" +#include "rgrp.h" +#include "trans.h" +#include "util.h" + +/** + * ea_calc_size - returns the acutal number of bytes the request will take up + * (not counting any unstuffed data blocks) + * @sdp: + * @er: + * @size: + * + * Returns: 1 if the EA should be stuffed + */ + +static int ea_calc_size(struct gfs2_sbd *sdp, unsigned int nsize, size_t dsize, + unsigned int *size) +{ + unsigned int jbsize = sdp->sd_jbsize; + + /* Stuffed */ + *size = ALIGN(sizeof(struct gfs2_ea_header) + nsize + dsize, 8); + + if (*size <= jbsize) + return 1; + + /* Unstuffed */ + *size = ALIGN(sizeof(struct gfs2_ea_header) + nsize + + (sizeof(__be64) * DIV_ROUND_UP(dsize, jbsize)), 8); + + return 0; +} + +static int ea_check_size(struct gfs2_sbd *sdp, unsigned int nsize, size_t dsize) +{ + unsigned int size; + + if (dsize > GFS2_EA_MAX_DATA_LEN) + return -ERANGE; + + ea_calc_size(sdp, nsize, dsize, &size); + + /* This can only happen with 512 byte blocks */ + if (size > sdp->sd_jbsize) + return -ERANGE; + + return 0; +} + +typedef int (*ea_call_t) (struct gfs2_inode *ip, struct buffer_head *bh, + struct gfs2_ea_header *ea, + struct gfs2_ea_header *prev, void *private); + +static int ea_foreach_i(struct gfs2_inode *ip, struct buffer_head *bh, + ea_call_t ea_call, void *data) +{ + struct gfs2_ea_header *ea, *prev = NULL; + int error = 0; + + if (gfs2_metatype_check(GFS2_SB(&ip->i_inode), bh, GFS2_METATYPE_EA)) + return -EIO; + + for (ea = GFS2_EA_BH2FIRST(bh);; prev = ea, ea = GFS2_EA2NEXT(ea)) { + if (!GFS2_EA_REC_LEN(ea)) + goto fail; + if (!(bh->b_data <= (char *)ea && (char *)GFS2_EA2NEXT(ea) <= + bh->b_data + bh->b_size)) + goto fail; + if (!GFS2_EATYPE_VALID(ea->ea_type)) + goto fail; + + error = ea_call(ip, bh, ea, prev, data); + if (error) + return error; + + if (GFS2_EA_IS_LAST(ea)) { + if ((char *)GFS2_EA2NEXT(ea) != + bh->b_data + bh->b_size) + goto fail; + break; + } + } + + return error; + +fail: + gfs2_consist_inode(ip); + return -EIO; +} + +static int ea_foreach(struct gfs2_inode *ip, ea_call_t ea_call, void *data) +{ + struct buffer_head *bh, *eabh; + __be64 *eablk, *end; + int error; + + error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT, &bh); + if (error) + return error; + + if (!(ip->i_diskflags & GFS2_DIF_EA_INDIRECT)) { + error = ea_foreach_i(ip, bh, ea_call, data); + goto out; + } + + if (gfs2_metatype_check(GFS2_SB(&ip->i_inode), bh, GFS2_METATYPE_IN)) { + error = -EIO; + goto out; + } + + eablk = (__be64 *)(bh->b_data + sizeof(struct gfs2_meta_header)); + end = eablk + GFS2_SB(&ip->i_inode)->sd_inptrs; + + for (; eablk < end; eablk++) { + u64 bn; + + if (!*eablk) + break; + bn = be64_to_cpu(*eablk); + + error = gfs2_meta_read(ip->i_gl, bn, DIO_WAIT, &eabh); + if (error) + break; + error = ea_foreach_i(ip, eabh, ea_call, data); + brelse(eabh); + if (error) + break; + } +out: + brelse(bh); + return error; +} + +struct ea_find { + int type; + const char *name; + size_t namel; + struct gfs2_ea_location *ef_el; +}; + +static int ea_find_i(struct gfs2_inode *ip, struct buffer_head *bh, + struct gfs2_ea_header *ea, struct gfs2_ea_header *prev, + void *private) +{ + struct ea_find *ef = private; + + if (ea->ea_type == GFS2_EATYPE_UNUSED) + return 0; + + if (ea->ea_type == ef->type) { + if (ea->ea_name_len == ef->namel && + !memcmp(GFS2_EA2NAME(ea), ef->name, ea->ea_name_len)) { + struct gfs2_ea_location *el = ef->ef_el; + get_bh(bh); + el->el_bh = bh; + el->el_ea = ea; + el->el_prev = prev; + return 1; + } + } + + return 0; +} + +int gfs2_ea_find(struct gfs2_inode *ip, int type, const char *name, + struct gfs2_ea_location *el) +{ + struct ea_find ef; + int error; + + ef.type = type; + ef.name = name; + ef.namel = strlen(name); + ef.ef_el = el; + + memset(el, 0, sizeof(struct gfs2_ea_location)); + + error = ea_foreach(ip, ea_find_i, &ef); + if (error > 0) + return 0; + + return error; +} + +/** + * ea_dealloc_unstuffed - + * @ip: + * @bh: + * @ea: + * @prev: + * @private: + * + * Take advantage of the fact that all unstuffed blocks are + * allocated from the same RG. But watch, this may not always + * be true. + * + * Returns: errno + */ + +static int ea_dealloc_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh, + struct gfs2_ea_header *ea, + struct gfs2_ea_header *prev, void *private) +{ + int *leave = private; + struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); + struct gfs2_rgrpd *rgd; + struct gfs2_holder rg_gh; + struct buffer_head *dibh; + __be64 *dataptrs; + u64 bn = 0; + u64 bstart = 0; + unsigned int blen = 0; + unsigned int blks = 0; + unsigned int x; + int error; + + if (GFS2_EA_IS_STUFFED(ea)) + return 0; + + dataptrs = GFS2_EA2DATAPTRS(ea); + for (x = 0; x < ea->ea_num_ptrs; x++, dataptrs++) { + if (*dataptrs) { + blks++; + bn = be64_to_cpu(*dataptrs); + } + } + if (!blks) + return 0; + + rgd = gfs2_blk2rgrpd(sdp, bn); + if (!rgd) { + gfs2_consist_inode(ip); + return -EIO; + } + + error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &rg_gh); + if (error) + return error; + + error = gfs2_trans_begin(sdp, rgd->rd_length + RES_DINODE + + RES_EATTR + RES_STATFS + RES_QUOTA, blks); + if (error) + goto out_gunlock; + + gfs2_trans_add_bh(ip->i_gl, bh, 1); + + dataptrs = GFS2_EA2DATAPTRS(ea); + for (x = 0; x < ea->ea_num_ptrs; x++, dataptrs++) { + if (!*dataptrs) + break; + bn = be64_to_cpu(*dataptrs); + + if (bstart + blen == bn) + blen++; + else { + if (bstart) + gfs2_free_meta(ip, bstart, blen); + bstart = bn; + blen = 1; + } + + *dataptrs = 0; + gfs2_add_inode_blocks(&ip->i_inode, -1); + } + if (bstart) + gfs2_free_meta(ip, bstart, blen); + + if (prev && !leave) { + u32 len; + + len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea); + prev->ea_rec_len = cpu_to_be32(len); + + if (GFS2_EA_IS_LAST(ea)) + prev->ea_flags |= GFS2_EAFLAG_LAST; + } else { + ea->ea_type = GFS2_EATYPE_UNUSED; + ea->ea_num_ptrs = 0; + } + + error = gfs2_meta_inode_buffer(ip, &dibh); + if (!error) { + ip->i_inode.i_ctime = CURRENT_TIME; + gfs2_trans_add_bh(ip->i_gl, dibh, 1); + gfs2_dinode_out(ip, dibh->b_data); + brelse(dibh); + } + + gfs2_trans_end(sdp); + +out_gunlock: + gfs2_glock_dq_uninit(&rg_gh); + return error; +} + +static int ea_remove_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh, + struct gfs2_ea_header *ea, + struct gfs2_ea_header *prev, int leave) +{ + struct gfs2_alloc *al; + int error; + + al = gfs2_alloc_get(ip); + if (!al) + return -ENOMEM; + + error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE); + if (error) + goto out_alloc; + + error = gfs2_rindex_hold(GFS2_SB(&ip->i_inode), &al->al_ri_gh); + if (error) + goto out_quota; + + error = ea_dealloc_unstuffed(ip, bh, ea, prev, (leave) ? &error : NULL); + + gfs2_glock_dq_uninit(&al->al_ri_gh); + +out_quota: + gfs2_quota_unhold(ip); +out_alloc: + gfs2_alloc_put(ip); + return error; +} + +struct ea_list { + struct gfs2_ea_request *ei_er; + unsigned int ei_size; +}; + +static inline unsigned int gfs2_ea_strlen(struct gfs2_ea_header *ea) +{ + switch (ea->ea_type) { + case GFS2_EATYPE_USR: + return 5 + ea->ea_name_len + 1; + case GFS2_EATYPE_SYS: + return 7 + ea->ea_name_len + 1; + case GFS2_EATYPE_SECURITY: + return 9 + ea->ea_name_len + 1; + default: + return 0; + } +} + +static int ea_list_i(struct gfs2_inode *ip, struct buffer_head *bh, + struct gfs2_ea_header *ea, struct gfs2_ea_header *prev, + void *private) +{ + struct ea_list *ei = private; + struct gfs2_ea_request *er = ei->ei_er; + unsigned int ea_size = gfs2_ea_strlen(ea); + + if (ea->ea_type == GFS2_EATYPE_UNUSED) + return 0; + + if (er->er_data_len) { + char *prefix = NULL; + unsigned int l = 0; + char c = 0; + + if (ei->ei_size + ea_size > er->er_data_len) + return -ERANGE; + + switch (ea->ea_type) { + case GFS2_EATYPE_USR: + prefix = "user."; + l = 5; + break; + case GFS2_EATYPE_SYS: + prefix = "system."; + l = 7; + break; + case GFS2_EATYPE_SECURITY: + prefix = "security."; + l = 9; + break; + } + + BUG_ON(l == 0); + + memcpy(er->er_data + ei->ei_size, prefix, l); + memcpy(er->er_data + ei->ei_size + l, GFS2_EA2NAME(ea), + ea->ea_name_len); + memcpy(er->er_data + ei->ei_size + ea_size - 1, &c, 1); + } + + ei->ei_size += ea_size; + + return 0; +} + +/** + * gfs2_listxattr - List gfs2 extended attributes + * @dentry: The dentry whose inode we are interested in + * @buffer: The buffer to write the results + * @size: The size of the buffer + * + * Returns: actual size of data on success, -errno on error + */ + +ssize_t gfs2_listxattr(struct dentry *dentry, char *buffer, size_t size) +{ + struct gfs2_inode *ip = GFS2_I(dentry->d_inode); + struct gfs2_ea_request er; + struct gfs2_holder i_gh; + int error; + + memset(&er, 0, sizeof(struct gfs2_ea_request)); + if (size) { + er.er_data = buffer; + er.er_data_len = size; + } + + error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh); + if (error) + return error; + + if (ip->i_eattr) { + struct ea_list ei = { .ei_er = &er, .ei_size = 0 }; + + error = ea_foreach(ip, ea_list_i, &ei); + if (!error) + error = ei.ei_size; + } + + gfs2_glock_dq_uninit(&i_gh); + + return error; +} + +/** + * ea_get_unstuffed - actually copies the unstuffed data into the + * request buffer + * @ip: The GFS2 inode + * @ea: The extended attribute header structure + * @data: The data to be copied + * + * Returns: errno + */ + +static int ea_get_unstuffed(struct gfs2_inode *ip, struct gfs2_ea_header *ea, + char *data) +{ + struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); + struct buffer_head **bh; + unsigned int amount = GFS2_EA_DATA_LEN(ea); + unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize); + __be64 *dataptrs = GFS2_EA2DATAPTRS(ea); + unsigned int x; + int error = 0; + + bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_NOFS); + if (!bh) + return -ENOMEM; + + for (x = 0; x < nptrs; x++) { + error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs), 0, + bh + x); + if (error) { + while (x--) + brelse(bh[x]); + goto out; + } + dataptrs++; + } + + for (x = 0; x < nptrs; x++) { + error = gfs2_meta_wait(sdp, bh[x]); + if (error) { + for (; x < nptrs; x++) + brelse(bh[x]); + goto out; + } + if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) { + for (; x < nptrs; x++) + brelse(bh[x]); + error = -EIO; + goto out; + } + + memcpy(data, bh[x]->b_data + sizeof(struct gfs2_meta_header), + (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize); + + amount -= sdp->sd_jbsize; + data += sdp->sd_jbsize; + + brelse(bh[x]); + } + +out: + kfree(bh); + return error; +} + +int gfs2_ea_get_copy(struct gfs2_inode *ip, struct gfs2_ea_location *el, + char *data, size_t size) +{ + int ret; + size_t len = GFS2_EA_DATA_LEN(el->el_ea); + if (len > size) + return -ERANGE; + + if (GFS2_EA_IS_STUFFED(el->el_ea)) { + memcpy(data, GFS2_EA2DATA(el->el_ea), len); + return len; + } + ret = ea_get_unstuffed(ip, el->el_ea, data); + if (ret < 0) + return ret; + return len; +} + +/** + * gfs2_xattr_get - Get a GFS2 extended attribute + * @inode: The inode + * @type: The type of extended attribute + * @name: The name of the extended attribute + * @buffer: The buffer to write the result into + * @size: The size of the buffer + * + * Returns: actual size of data on success, -errno on error + */ + +int gfs2_xattr_get(struct inode *inode, int type, const char *name, + void *buffer, size_t size) +{ + struct gfs2_inode *ip = GFS2_I(inode); + struct gfs2_ea_location el; + int error; + + if (!ip->i_eattr) + return -ENODATA; + if (strlen(name) > GFS2_EA_MAX_NAME_LEN) + return -EINVAL; + + error = gfs2_ea_find(ip, type, name, &el); + if (error) + return error; + if (!el.el_ea) + return -ENODATA; + if (size) + error = gfs2_ea_get_copy(ip, &el, buffer, size); + else + error = GFS2_EA_DATA_LEN(el.el_ea); + brelse(el.el_bh); + + return error; +} + +/** + * ea_alloc_blk - allocates a new block for extended attributes. + * @ip: A pointer to the inode that's getting extended attributes + * @bhp: Pointer to pointer to a struct buffer_head + * + * Returns: errno + */ + +static int ea_alloc_blk(struct gfs2_inode *ip, struct buffer_head **bhp) +{ + struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); + struct gfs2_ea_header *ea; + unsigned int n = 1; + u64 block; + int error; + + error = gfs2_alloc_block(ip, &block, &n); + if (error) + return error; + gfs2_trans_add_unrevoke(sdp, block, 1); + *bhp = gfs2_meta_new(ip->i_gl, block); + gfs2_trans_add_bh(ip->i_gl, *bhp, 1); + gfs2_metatype_set(*bhp, GFS2_METATYPE_EA, GFS2_FORMAT_EA); + gfs2_buffer_clear_tail(*bhp, sizeof(struct gfs2_meta_header)); + + ea = GFS2_EA_BH2FIRST(*bhp); + ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize); + ea->ea_type = GFS2_EATYPE_UNUSED; + ea->ea_flags = GFS2_EAFLAG_LAST; + ea->ea_num_ptrs = 0; + + gfs2_add_inode_blocks(&ip->i_inode, 1); + + return 0; +} + +/** + * ea_write - writes the request info to an ea, creating new blocks if + * necessary + * @ip: inode that is being modified + * @ea: the location of the new ea in a block + * @er: the write request + * + * Note: does not update ea_rec_len or the GFS2_EAFLAG_LAST bin of ea_flags + * + * returns : errno + */ + +static int ea_write(struct gfs2_inode *ip, struct gfs2_ea_header *ea, + struct gfs2_ea_request *er) +{ + struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); + int error; + + ea->ea_data_len = cpu_to_be32(er->er_data_len); + ea->ea_name_len = er->er_name_len; + ea->ea_type = er->er_type; + ea->__pad = 0; + + memcpy(GFS2_EA2NAME(ea), er->er_name, er->er_name_len); + + if (GFS2_EAREQ_SIZE_STUFFED(er) <= sdp->sd_jbsize) { + ea->ea_num_ptrs = 0; + memcpy(GFS2_EA2DATA(ea), er->er_data, er->er_data_len); + } else { + __be64 *dataptr = GFS2_EA2DATAPTRS(ea); + const char *data = er->er_data; + unsigned int data_len = er->er_data_len; + unsigned int copy; + unsigned int x; + + ea->ea_num_ptrs = DIV_ROUND_UP(er->er_data_len, sdp->sd_jbsize); + for (x = 0; x < ea->ea_num_ptrs; x++) { + struct buffer_head *bh; + u64 block; + int mh_size = sizeof(struct gfs2_meta_header); + unsigned int n = 1; + + error = gfs2_alloc_block(ip, &block, &n); + if (error) + return error; + gfs2_trans_add_unrevoke(sdp, block, 1); + bh = gfs2_meta_new(ip->i_gl, block); + gfs2_trans_add_bh(ip->i_gl, bh, 1); + gfs2_metatype_set(bh, GFS2_METATYPE_ED, GFS2_FORMAT_ED); + + gfs2_add_inode_blocks(&ip->i_inode, 1); + + copy = data_len > sdp->sd_jbsize ? sdp->sd_jbsize : + data_len; + memcpy(bh->b_data + mh_size, data, copy); + if (copy < sdp->sd_jbsize) + memset(bh->b_data + mh_size + copy, 0, + sdp->sd_jbsize - copy); + + *dataptr++ = cpu_to_be64(bh->b_blocknr); + data += copy; + data_len -= copy; + + brelse(bh); + } + + gfs2_assert_withdraw(sdp, !data_len); + } + + return 0; +} + +typedef int (*ea_skeleton_call_t) (struct gfs2_inode *ip, + struct gfs2_ea_request *er, void *private); + +static int ea_alloc_skeleton(struct gfs2_inode *ip, struct gfs2_ea_request *er, + unsigned int blks, + ea_skeleton_call_t skeleton_call, void *private) +{ + struct gfs2_alloc *al; + struct buffer_head *dibh; + int error; + + al = gfs2_alloc_get(ip); + if (!al) + return -ENOMEM; + + error = gfs2_quota_lock_check(ip); + if (error) + goto out; + + al->al_requested = blks; + + error = gfs2_inplace_reserve(ip); + if (error) + goto out_gunlock_q; + + error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), + blks + al->al_rgd->rd_length + + RES_DINODE + RES_STATFS + RES_QUOTA, 0); + if (error) + goto out_ipres; + + error = skeleton_call(ip, er, private); + if (error) + goto out_end_trans; + + error = gfs2_meta_inode_buffer(ip, &dibh); + if (!error) { + ip->i_inode.i_ctime = CURRENT_TIME; + gfs2_trans_add_bh(ip->i_gl, dibh, 1); + gfs2_dinode_out(ip, dibh->b_data); + brelse(dibh); + } + +out_end_trans: + gfs2_trans_end(GFS2_SB(&ip->i_inode)); +out_ipres: + gfs2_inplace_release(ip); +out_gunlock_q: + gfs2_quota_unlock(ip); +out: + gfs2_alloc_put(ip); + return error; +} + +static int ea_init_i(struct gfs2_inode *ip, struct gfs2_ea_request *er, + void *private) +{ + struct buffer_head *bh; + int error; + + error = ea_alloc_blk(ip, &bh); + if (error) + return error; + + ip->i_eattr = bh->b_blocknr; + error = ea_write(ip, GFS2_EA_BH2FIRST(bh), er); + + brelse(bh); + + return error; +} + +/** + * ea_init - initializes a new eattr block + * @ip: + * @er: + * + * Returns: errno + */ + +static int ea_init(struct gfs2_inode *ip, int type, const char *name, + const void *data, size_t size) +{ + struct gfs2_ea_request er; + unsigned int jbsize = GFS2_SB(&ip->i_inode)->sd_jbsize; + unsigned int blks = 1; + + er.er_type = type; + er.er_name = name; + er.er_name_len = strlen(name); + er.er_data = (void *)data; + er.er_data_len = size; + + if (GFS2_EAREQ_SIZE_STUFFED(&er) > jbsize) + blks += DIV_ROUND_UP(er.er_data_len, jbsize); + + return ea_alloc_skeleton(ip, &er, blks, ea_init_i, NULL); +} + +static struct gfs2_ea_header *ea_split_ea(struct gfs2_ea_header *ea) +{ + u32 ea_size = GFS2_EA_SIZE(ea); + struct gfs2_ea_header *new = (struct gfs2_ea_header *)((char *)ea + + ea_size); + u32 new_size = GFS2_EA_REC_LEN(ea) - ea_size; + int last = ea->ea_flags & GFS2_EAFLAG_LAST; + + ea->ea_rec_len = cpu_to_be32(ea_size); + ea->ea_flags ^= last; + + new->ea_rec_len = cpu_to_be32(new_size); + new->ea_flags = last; + + return new; +} + +static void ea_set_remove_stuffed(struct gfs2_inode *ip, + struct gfs2_ea_location *el) +{ + struct gfs2_ea_header *ea = el->el_ea; + struct gfs2_ea_header *prev = el->el_prev; + u32 len; + + gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1); + + if (!prev || !GFS2_EA_IS_STUFFED(ea)) { + ea->ea_type = GFS2_EATYPE_UNUSED; + return; + } else if (GFS2_EA2NEXT(prev) != ea) { + prev = GFS2_EA2NEXT(prev); + gfs2_assert_withdraw(GFS2_SB(&ip->i_inode), GFS2_EA2NEXT(prev) == ea); + } + + len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea); + prev->ea_rec_len = cpu_to_be32(len); + + if (GFS2_EA_IS_LAST(ea)) + prev->ea_flags |= GFS2_EAFLAG_LAST; +} + +struct ea_set { + int ea_split; + + struct gfs2_ea_request *es_er; + struct gfs2_ea_location *es_el; + + struct buffer_head *es_bh; + struct gfs2_ea_header *es_ea; +}; + +static int ea_set_simple_noalloc(struct gfs2_inode *ip, struct buffer_head *bh, + struct gfs2_ea_header *ea, struct ea_set *es) +{ + struct gfs2_ea_request *er = es->es_er; + struct buffer_head *dibh; + int error; + + error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + 2 * RES_EATTR, 0); + if (error) + return error; + + gfs2_trans_add_bh(ip->i_gl, bh, 1); + + if (es->ea_split) + ea = ea_split_ea(ea); + + ea_write(ip, ea, er); + + if (es->es_el) + ea_set_remove_stuffed(ip, es->es_el); + + error = gfs2_meta_inode_buffer(ip, &dibh); + if (error) + goto out; + ip->i_inode.i_ctime = CURRENT_TIME; + gfs2_trans_add_bh(ip->i_gl, dibh, 1); + gfs2_dinode_out(ip, dibh->b_data); + brelse(dibh); +out: + gfs2_trans_end(GFS2_SB(&ip->i_inode)); + return error; +} + +static int ea_set_simple_alloc(struct gfs2_inode *ip, + struct gfs2_ea_request *er, void *private) +{ + struct ea_set *es = private; + struct gfs2_ea_header *ea = es->es_ea; + int error; + + gfs2_trans_add_bh(ip->i_gl, es->es_bh, 1); + + if (es->ea_split) + ea = ea_split_ea(ea); + + error = ea_write(ip, ea, er); + if (error) + return error; + + if (es->es_el) + ea_set_remove_stuffed(ip, es->es_el); + + return 0; +} + +static int ea_set_simple(struct gfs2_inode *ip, struct buffer_head *bh, + struct gfs2_ea_header *ea, struct gfs2_ea_header *prev, + void *private) +{ + struct ea_set *es = private; + unsigned int size; + int stuffed; + int error; + + stuffed = ea_calc_size(GFS2_SB(&ip->i_inode), es->es_er->er_name_len, + es->es_er->er_data_len, &size); + + if (ea->ea_type == GFS2_EATYPE_UNUSED) { + if (GFS2_EA_REC_LEN(ea) < size) + return 0; + if (!GFS2_EA_IS_STUFFED(ea)) { + error = ea_remove_unstuffed(ip, bh, ea, prev, 1); + if (error) + return error; + } + es->ea_split = 0; + } else if (GFS2_EA_REC_LEN(ea) - GFS2_EA_SIZE(ea) >= size) + es->ea_split = 1; + else + return 0; + + if (stuffed) { + error = ea_set_simple_noalloc(ip, bh, ea, es); + if (error) + return error; + } else { + unsigned int blks; + + es->es_bh = bh; + es->es_ea = ea; + blks = 2 + DIV_ROUND_UP(es->es_er->er_data_len, + GFS2_SB(&ip->i_inode)->sd_jbsize); + + error = ea_alloc_skeleton(ip, es->es_er, blks, + ea_set_simple_alloc, es); + if (error) + return error; + } + + return 1; +} + +static int ea_set_block(struct gfs2_inode *ip, struct gfs2_ea_request *er, + void *private) +{ + struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); + struct buffer_head *indbh, *newbh; + __be64 *eablk; + int error; + int mh_size = sizeof(struct gfs2_meta_header); + + if (ip->i_diskflags & GFS2_DIF_EA_INDIRECT) { + __be64 *end; + + error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT, + &indbh); + if (error) + return error; + + if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) { + error = -EIO; + goto out; + } + + eablk = (__be64 *)(indbh->b_data + mh_size); + end = eablk + sdp->sd_inptrs; + + for (; eablk < end; eablk++) + if (!*eablk) + break; + + if (eablk == end) { + error = -ENOSPC; + goto out; + } + + gfs2_trans_add_bh(ip->i_gl, indbh, 1); + } else { + u64 blk; + unsigned int n = 1; + error = gfs2_alloc_block(ip, &blk, &n); + if (error) + return error; + gfs2_trans_add_unrevoke(sdp, blk, 1); + indbh = gfs2_meta_new(ip->i_gl, blk); + gfs2_trans_add_bh(ip->i_gl, indbh, 1); + gfs2_metatype_set(indbh, GFS2_METATYPE_IN, GFS2_FORMAT_IN); + gfs2_buffer_clear_tail(indbh, mh_size); + + eablk = (__be64 *)(indbh->b_data + mh_size); + *eablk = cpu_to_be64(ip->i_eattr); + ip->i_eattr = blk; + ip->i_diskflags |= GFS2_DIF_EA_INDIRECT; + gfs2_add_inode_blocks(&ip->i_inode, 1); + + eablk++; + } + + error = ea_alloc_blk(ip, &newbh); + if (error) + goto out; + + *eablk = cpu_to_be64((u64)newbh->b_blocknr); + error = ea_write(ip, GFS2_EA_BH2FIRST(newbh), er); + brelse(newbh); + if (error) + goto out; + + if (private) + ea_set_remove_stuffed(ip, private); + +out: + brelse(indbh); + return error; +} + +static int ea_set_i(struct gfs2_inode *ip, int type, const char *name, + const void *value, size_t size, struct gfs2_ea_location *el) +{ + struct gfs2_ea_request er; + struct ea_set es; + unsigned int blks = 2; + int error; + + er.er_type = type; + er.er_name = name; + er.er_data = (void *)value; + er.er_name_len = strlen(name); + er.er_data_len = size; + + memset(&es, 0, sizeof(struct ea_set)); + es.es_er = &er; + es.es_el = el; + + error = ea_foreach(ip, ea_set_simple, &es); + if (error > 0) + return 0; + if (error) + return error; + + if (!(ip->i_diskflags & GFS2_DIF_EA_INDIRECT)) + blks++; + if (GFS2_EAREQ_SIZE_STUFFED(&er) > GFS2_SB(&ip->i_inode)->sd_jbsize) + blks += DIV_ROUND_UP(er.er_data_len, GFS2_SB(&ip->i_inode)->sd_jbsize); + + return ea_alloc_skeleton(ip, &er, blks, ea_set_block, el); +} + +static int ea_set_remove_unstuffed(struct gfs2_inode *ip, + struct gfs2_ea_location *el) +{ + if (el->el_prev && GFS2_EA2NEXT(el->el_prev) != el->el_ea) { + el->el_prev = GFS2_EA2NEXT(el->el_prev); + gfs2_assert_withdraw(GFS2_SB(&ip->i_inode), + GFS2_EA2NEXT(el->el_prev) == el->el_ea); + } + + return ea_remove_unstuffed(ip, el->el_bh, el->el_ea, el->el_prev,0); +} + +static int ea_remove_stuffed(struct gfs2_inode *ip, struct gfs2_ea_location *el) +{ + struct gfs2_ea_header *ea = el->el_ea; + struct gfs2_ea_header *prev = el->el_prev; + struct buffer_head *dibh; + int error; + + error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + RES_EATTR, 0); + if (error) + return error; + + gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1); + + if (prev) { + u32 len; + + len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea); + prev->ea_rec_len = cpu_to_be32(len); + + if (GFS2_EA_IS_LAST(ea)) + prev->ea_flags |= GFS2_EAFLAG_LAST; + } else { + ea->ea_type = GFS2_EATYPE_UNUSED; + } + + error = gfs2_meta_inode_buffer(ip, &dibh); + if (!error) { + ip->i_inode.i_ctime = CURRENT_TIME; + gfs2_trans_add_bh(ip->i_gl, dibh, 1); + gfs2_dinode_out(ip, dibh->b_data); + brelse(dibh); + } + + gfs2_trans_end(GFS2_SB(&ip->i_inode)); + + return error; +} + +/** + * gfs2_xattr_remove - Remove a GFS2 extended attribute + * @inode: The inode + * @type: The type of the extended attribute + * @name: The name of the extended attribute + * + * This is not called directly by the VFS since we use the (common) + * scheme of making a "set with NULL data" mean a remove request. Note + * that this is different from a set with zero length data. + * + * Returns: 0, or errno on failure + */ + +static int gfs2_xattr_remove(struct inode *inode, int type, const char *name) +{ + struct gfs2_inode *ip = GFS2_I(inode); + struct gfs2_ea_location el; + int error; + + if (!ip->i_eattr) + return -ENODATA; + + error = gfs2_ea_find(ip, type, name, &el); + if (error) + return error; + if (!el.el_ea) + return -ENODATA; + + if (GFS2_EA_IS_STUFFED(el.el_ea)) + error = ea_remove_stuffed(ip, &el); + else + error = ea_remove_unstuffed(ip, el.el_bh, el.el_ea, el.el_prev, 0); + + brelse(el.el_bh); + + return error; +} + +/** + * gfs2_xattr_set - Set (or remove) a GFS2 extended attribute + * @inode: The inode + * @type: The type of the extended attribute + * @name: The name of the extended attribute + * @value: The value of the extended attribute (NULL for remove) + * @size: The size of the @value argument + * @flags: Create or Replace + * + * See gfs2_xattr_remove() for details of the removal of xattrs. + * + * Returns: 0 or errno on failure + */ + +int gfs2_xattr_set(struct inode *inode, int type, const char *name, + const void *value, size_t size, int flags) +{ + struct gfs2_sbd *sdp = GFS2_SB(inode); + struct gfs2_inode *ip = GFS2_I(inode); + struct gfs2_ea_location el; + unsigned int namel = strlen(name); + int error; + + if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) + return -EPERM; + if (namel > GFS2_EA_MAX_NAME_LEN) + return -ERANGE; + + if (value == NULL) + return gfs2_xattr_remove(inode, type, name); + + if (ea_check_size(sdp, namel, size)) + return -ERANGE; + + if (!ip->i_eattr) { + if (flags & XATTR_REPLACE) + return -ENODATA; + return ea_init(ip, type, name, value, size); + } + + error = gfs2_ea_find(ip, type, name, &el); + if (error) + return error; + + if (el.el_ea) { + if (ip->i_diskflags & GFS2_DIF_APPENDONLY) { + brelse(el.el_bh); + return -EPERM; + } + + error = -EEXIST; + if (!(flags & XATTR_CREATE)) { + int unstuffed = !GFS2_EA_IS_STUFFED(el.el_ea); + error = ea_set_i(ip, type, name, value, size, &el); + if (!error && unstuffed) + ea_set_remove_unstuffed(ip, &el); + } + + brelse(el.el_bh); + return error; + } + + error = -ENODATA; + if (!(flags & XATTR_REPLACE)) + error = ea_set_i(ip, type, name, value, size, NULL); + + return error; +} + +static int ea_acl_chmod_unstuffed(struct gfs2_inode *ip, + struct gfs2_ea_header *ea, char *data) +{ + struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); + struct buffer_head **bh; + unsigned int amount = GFS2_EA_DATA_LEN(ea); + unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize); + __be64 *dataptrs = GFS2_EA2DATAPTRS(ea); + unsigned int x; + int error; + + bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_NOFS); + if (!bh) + return -ENOMEM; + + error = gfs2_trans_begin(sdp, nptrs + RES_DINODE, 0); + if (error) + goto out; + + for (x = 0; x < nptrs; x++) { + error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs), 0, + bh + x); + if (error) { + while (x--) + brelse(bh[x]); + goto fail; + } + dataptrs++; + } + + for (x = 0; x < nptrs; x++) { + error = gfs2_meta_wait(sdp, bh[x]); + if (error) { + for (; x < nptrs; x++) + brelse(bh[x]); + goto fail; + } + if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) { + for (; x < nptrs; x++) + brelse(bh[x]); + error = -EIO; + goto fail; + } + + gfs2_trans_add_bh(ip->i_gl, bh[x], 1); + + memcpy(bh[x]->b_data + sizeof(struct gfs2_meta_header), data, + (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize); + + amount -= sdp->sd_jbsize; + data += sdp->sd_jbsize; + + brelse(bh[x]); + } + +out: + kfree(bh); + return error; + +fail: + gfs2_trans_end(sdp); + kfree(bh); + return error; +} + +int gfs2_ea_acl_chmod(struct gfs2_inode *ip, struct gfs2_ea_location *el, + struct iattr *attr, char *data) +{ + struct buffer_head *dibh; + int error; + + if (GFS2_EA_IS_STUFFED(el->el_ea)) { + error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + RES_EATTR, 0); + if (error) + return error; + + gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1); + memcpy(GFS2_EA2DATA(el->el_ea), data, + GFS2_EA_DATA_LEN(el->el_ea)); + } else + error = ea_acl_chmod_unstuffed(ip, el->el_ea, data); + + if (error) + return error; + + error = gfs2_meta_inode_buffer(ip, &dibh); + if (!error) { + error = inode_setattr(&ip->i_inode, attr); + gfs2_assert_warn(GFS2_SB(&ip->i_inode), !error); + gfs2_trans_add_bh(ip->i_gl, dibh, 1); + gfs2_dinode_out(ip, dibh->b_data); + brelse(dibh); + } + + gfs2_trans_end(GFS2_SB(&ip->i_inode)); + + return error; +} + +static int ea_dealloc_indirect(struct gfs2_inode *ip) +{ + struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); + struct gfs2_rgrp_list rlist; + struct buffer_head *indbh, *dibh; + __be64 *eablk, *end; + unsigned int rg_blocks = 0; + u64 bstart = 0; + unsigned int blen = 0; + unsigned int blks = 0; + unsigned int x; + int error; + + memset(&rlist, 0, sizeof(struct gfs2_rgrp_list)); + + error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT, &indbh); + if (error) + return error; + + if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) { + error = -EIO; + goto out; + } + + eablk = (__be64 *)(indbh->b_data + sizeof(struct gfs2_meta_header)); + end = eablk + sdp->sd_inptrs; + + for (; eablk < end; eablk++) { + u64 bn; + + if (!*eablk) + break; + bn = be64_to_cpu(*eablk); + + if (bstart + blen == bn) + blen++; + else { + if (bstart) + gfs2_rlist_add(sdp, &rlist, bstart); + bstart = bn; + blen = 1; + } + blks++; + } + if (bstart) + gfs2_rlist_add(sdp, &rlist, bstart); + else + goto out; + + gfs2_rlist_alloc(&rlist, LM_ST_EXCLUSIVE); + + for (x = 0; x < rlist.rl_rgrps; x++) { + struct gfs2_rgrpd *rgd; + rgd = rlist.rl_ghs[x].gh_gl->gl_object; + rg_blocks += rgd->rd_length; + } + + error = gfs2_glock_nq_m(rlist.rl_rgrps, rlist.rl_ghs); + if (error) + goto out_rlist_free; + + error = gfs2_trans_begin(sdp, rg_blocks + RES_DINODE + RES_INDIRECT + + RES_STATFS + RES_QUOTA, blks); + if (error) + goto out_gunlock; + + gfs2_trans_add_bh(ip->i_gl, indbh, 1); + + eablk = (__be64 *)(indbh->b_data + sizeof(struct gfs2_meta_header)); + bstart = 0; + blen = 0; + + for (; eablk < end; eablk++) { + u64 bn; + + if (!*eablk) + break; + bn = be64_to_cpu(*eablk); + + if (bstart + blen == bn) + blen++; + else { + if (bstart) + gfs2_free_meta(ip, bstart, blen); + bstart = bn; + blen = 1; + } + + *eablk = 0; + gfs2_add_inode_blocks(&ip->i_inode, -1); + } + if (bstart) + gfs2_free_meta(ip, bstart, blen); + + ip->i_diskflags &= ~GFS2_DIF_EA_INDIRECT; + + error = gfs2_meta_inode_buffer(ip, &dibh); + if (!error) { + gfs2_trans_add_bh(ip->i_gl, dibh, 1); + gfs2_dinode_out(ip, dibh->b_data); + brelse(dibh); + } + + gfs2_trans_end(sdp); + +out_gunlock: + gfs2_glock_dq_m(rlist.rl_rgrps, rlist.rl_ghs); +out_rlist_free: + gfs2_rlist_free(&rlist); +out: + brelse(indbh); + return error; +} + +static int ea_dealloc_block(struct gfs2_inode *ip) +{ + struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); + struct gfs2_alloc *al = ip->i_alloc; + struct gfs2_rgrpd *rgd; + struct buffer_head *dibh; + int error; + + rgd = gfs2_blk2rgrpd(sdp, ip->i_eattr); + if (!rgd) { + gfs2_consist_inode(ip); + return -EIO; + } + + error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, + &al->al_rgd_gh); + if (error) + return error; + + error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_DINODE + RES_STATFS + + RES_QUOTA, 1); + if (error) + goto out_gunlock; + + gfs2_free_meta(ip, ip->i_eattr, 1); + + ip->i_eattr = 0; + gfs2_add_inode_blocks(&ip->i_inode, -1); + + error = gfs2_meta_inode_buffer(ip, &dibh); + if (!error) { + gfs2_trans_add_bh(ip->i_gl, dibh, 1); + gfs2_dinode_out(ip, dibh->b_data); + brelse(dibh); + } + + gfs2_trans_end(sdp); + +out_gunlock: + gfs2_glock_dq_uninit(&al->al_rgd_gh); + return error; +} + +/** + * gfs2_ea_dealloc - deallocate the extended attribute fork + * @ip: the inode + * + * Returns: errno + */ + +int gfs2_ea_dealloc(struct gfs2_inode *ip) +{ + struct gfs2_alloc *al; + int error; + + al = gfs2_alloc_get(ip); + if (!al) + return -ENOMEM; + + error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE); + if (error) + goto out_alloc; + + error = gfs2_rindex_hold(GFS2_SB(&ip->i_inode), &al->al_ri_gh); + if (error) + goto out_quota; + + error = ea_foreach(ip, ea_dealloc_unstuffed, NULL); + if (error) + goto out_rindex; + + if (ip->i_diskflags & GFS2_DIF_EA_INDIRECT) { + error = ea_dealloc_indirect(ip); + if (error) + goto out_rindex; + } + + error = ea_dealloc_block(ip); + +out_rindex: + gfs2_glock_dq_uninit(&al->al_ri_gh); +out_quota: + gfs2_quota_unhold(ip); +out_alloc: + gfs2_alloc_put(ip); + return error; +} + +static int gfs2_xattr_user_get(struct inode *inode, const char *name, + void *buffer, size_t size) +{ + return gfs2_xattr_get(inode, GFS2_EATYPE_USR, name, buffer, size); +} + +static int gfs2_xattr_user_set(struct inode *inode, const char *name, + const void *value, size_t size, int flags) +{ + return gfs2_xattr_set(inode, GFS2_EATYPE_USR, name, value, size, flags); +} + +static int gfs2_xattr_system_get(struct inode *inode, const char *name, + void *buffer, size_t size) +{ + return gfs2_xattr_get(inode, GFS2_EATYPE_SYS, name, buffer, size); +} + +static int gfs2_xattr_system_set(struct inode *inode, const char *name, + const void *value, size_t size, int flags) +{ + return gfs2_xattr_set(inode, GFS2_EATYPE_SYS, name, value, size, flags); +} + +static int gfs2_xattr_security_get(struct inode *inode, const char *name, + void *buffer, size_t size) +{ + return gfs2_xattr_get(inode, GFS2_EATYPE_SECURITY, name, buffer, size); +} + +static int gfs2_xattr_security_set(struct inode *inode, const char *name, + const void *value, size_t size, int flags) +{ + return gfs2_xattr_set(inode, GFS2_EATYPE_SECURITY, name, value, size, flags); +} + +static struct xattr_handler gfs2_xattr_user_handler = { + .prefix = XATTR_USER_PREFIX, + .get = gfs2_xattr_user_get, + .set = gfs2_xattr_user_set, +}; + +static struct xattr_handler gfs2_xattr_security_handler = { + .prefix = XATTR_SECURITY_PREFIX, + .get = gfs2_xattr_security_get, + .set = gfs2_xattr_security_set, +}; + +static struct xattr_handler gfs2_xattr_system_handler = { + .prefix = XATTR_SYSTEM_PREFIX, + .get = gfs2_xattr_system_get, + .set = gfs2_xattr_system_set, +}; + +struct xattr_handler *gfs2_xattr_handlers[] = { + &gfs2_xattr_user_handler, + &gfs2_xattr_security_handler, + &gfs2_xattr_system_handler, + NULL, +}; + diff --git a/fs/gfs2/xattr.h b/fs/gfs2/xattr.h new file mode 100644 index 0000000..4040a18 --- /dev/null +++ b/fs/gfs2/xattr.h @@ -0,0 +1,72 @@ +/* + * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. + * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. + * + * This copyrighted material is made available to anyone wishing to use, + * modify, copy, or redistribute it subject to the terms and conditions + * of the GNU General Public License version 2. + */ + +#ifndef __EATTR_DOT_H__ +#define __EATTR_DOT_H__ + +struct gfs2_inode; +struct iattr; + +#define GFS2_EA_REC_LEN(ea) be32_to_cpu((ea)->ea_rec_len) +#define GFS2_EA_DATA_LEN(ea) be32_to_cpu((ea)->ea_data_len) + +#define GFS2_EA_SIZE(ea) \ +ALIGN(sizeof(struct gfs2_ea_header) + (ea)->ea_name_len + \ + ((GFS2_EA_IS_STUFFED(ea)) ? GFS2_EA_DATA_LEN(ea) : \ + (sizeof(__be64) * (ea)->ea_num_ptrs)), 8) + +#define GFS2_EA_IS_STUFFED(ea) (!(ea)->ea_num_ptrs) +#define GFS2_EA_IS_LAST(ea) ((ea)->ea_flags & GFS2_EAFLAG_LAST) + +#define GFS2_EAREQ_SIZE_STUFFED(er) \ +ALIGN(sizeof(struct gfs2_ea_header) + (er)->er_name_len + (er)->er_data_len, 8) + +#define GFS2_EA2NAME(ea) ((char *)((struct gfs2_ea_header *)(ea) + 1)) +#define GFS2_EA2DATA(ea) (GFS2_EA2NAME(ea) + (ea)->ea_name_len) + +#define GFS2_EA2DATAPTRS(ea) \ +((__be64 *)(GFS2_EA2NAME(ea) + ALIGN((ea)->ea_name_len, 8))) + +#define GFS2_EA2NEXT(ea) \ +((struct gfs2_ea_header *)((char *)(ea) + GFS2_EA_REC_LEN(ea))) + +#define GFS2_EA_BH2FIRST(bh) \ +((struct gfs2_ea_header *)((bh)->b_data + sizeof(struct gfs2_meta_header))) + +struct gfs2_ea_request { + const char *er_name; + char *er_data; + unsigned int er_name_len; + unsigned int er_data_len; + unsigned int er_type; /* GFS2_EATYPE_... */ +}; + +struct gfs2_ea_location { + struct buffer_head *el_bh; + struct gfs2_ea_header *el_ea; + struct gfs2_ea_header *el_prev; +}; + +extern int gfs2_xattr_get(struct inode *inode, int type, const char *name, + void *buffer, size_t size); +extern int gfs2_xattr_set(struct inode *inode, int type, const char *name, + const void *value, size_t size, int flags); +extern ssize_t gfs2_listxattr(struct dentry *dentry, char *buffer, size_t size); +extern int gfs2_ea_dealloc(struct gfs2_inode *ip); + +/* Exported to acl.c */ + +extern int gfs2_ea_find(struct gfs2_inode *ip, int type, const char *name, + struct gfs2_ea_location *el); +extern int gfs2_ea_get_copy(struct gfs2_inode *ip, struct gfs2_ea_location *el, + char *data, size_t size); +extern int gfs2_ea_acl_chmod(struct gfs2_inode *ip, struct gfs2_ea_location *el, + struct iattr *attr, char *data); + +#endif /* __EATTR_DOT_H__ */ -- cgit v0.10.2